From fffe5d5aa05b4e69f79bc75a51c5ee0fc6203fa5 Mon Sep 17 00:00:00 2001
From: Qiang Liu <qiang.liu@freescale.com>
Date: Tue, 8 Nov 2011 08:43:08 -0500
Subject: mmc: sd: Macro name cleanup for high speed dtr

Add new macros for the high speed 50MHz case, rather than having
a confusing reuse of the value for UHS SDR50, which is 100MHz.

Reported-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/sd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index f2a05ea40f2a..f54392c4638a 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -307,8 +307,8 @@ static int mmc_read_switch(struct mmc_card *card)
 		goto out;
 	}
 
-	if (status[13] & UHS_SDR50_BUS_SPEED)
-		card->sw_caps.hs_max_dtr = 50000000;
+	if (status[13] & SD_MODE_HIGH_SPEED)
+		card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
 
 	if (card->scr.sda_spec3) {
 		card->sw_caps.sd3_bus_mode = status[13];
-- 
cgit v1.2.3


From 052d81da6e6f0f8839ef6d5a46f215fc8cd99d5a Mon Sep 17 00:00:00 2001
From: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Date: Wed, 26 Oct 2011 10:52:17 +0200
Subject: mmc: sdio: Fix to support any block size optimally

This patch allows any block size to be set on the SDIO link,
and still have an arbitrary sized packet (adjusted in size by
using sdio_align_size) transferred in an optimal way
(preferably one transfer).

Previously if the block size was larger than the default of
512 bytes and the transfer size was exactly one block size
(possibly thanks to using sdio_align_size to get an optimal
transfer size), it was sent as a number of byte transfers instead
of one block transfer. Also if the number of blocks was
(max_blocks * N) + 1, the tranfer would be conducted with a number
of blocks and finished off with a number of byte transfers.

When doing this change it was also possible to break out the quirk
for broken byte mode in a much cleaner way, and collect the logic of
when to do byte or block transfer in one function instead of two.

Signed-off-by: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/sdio_io.c  |  8 ++++++--
 drivers/mmc/core/sdio_ops.c | 14 +++++---------
 2 files changed, 11 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
index b1f3168f791b..8f6f5ac131fc 100644
--- a/drivers/mmc/core/sdio_io.c
+++ b/drivers/mmc/core/sdio_io.c
@@ -196,6 +196,9 @@ static inline unsigned int sdio_max_byte_size(struct sdio_func *func)
 	else
 		mval = min(mval, func->max_blksize);
 
+	if (mmc_card_broken_byte_mode_512(func->card))
+		return min(mval, 511u);
+
 	return min(mval, 512u); /* maximum size for byte mode */
 }
 
@@ -314,7 +317,7 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 			func->card->host->max_seg_size / func->cur_blksize);
 		max_blocks = min(max_blocks, 511u);
 
-		while (remainder > func->cur_blksize) {
+		while (remainder >= func->cur_blksize) {
 			unsigned blocks;
 
 			blocks = remainder / func->cur_blksize;
@@ -339,8 +342,9 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
 	while (remainder > 0) {
 		size = min(remainder, sdio_max_byte_size(func));
 
+		/* Indicate byte mode by setting "blocks" = 0 */
 		ret = mmc_io_rw_extended(func->card, write, func->num, addr,
-			 incr_addr, buf, 1, size);
+			 incr_addr, buf, 0, size);
 		if (ret)
 			return ret;
 
diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index b0517cc06200..d29e20630eed 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -128,8 +128,6 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 
 	BUG_ON(!card);
 	BUG_ON(fn > 7);
-	BUG_ON(blocks == 1 && blksz > 512);
-	WARN_ON(blocks == 0);
 	WARN_ON(blksz == 0);
 
 	/* sanity check */
@@ -144,22 +142,20 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 	cmd.arg |= fn << 28;
 	cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
 	cmd.arg |= addr << 9;
-	if (blocks == 1 && blksz < 512)
-		cmd.arg |= blksz;			/* byte mode */
-	else if (blocks == 1 && blksz == 512 &&
-		 !(mmc_card_broken_byte_mode_512(card)))
-		cmd.arg |= 0;				/* byte mode, 0==512 */
+	if (blocks == 0)
+		cmd.arg |= (blksz == 512) ? 0 : blksz;	/* byte mode */
 	else
 		cmd.arg |= 0x08000000 | blocks;		/* block mode */
 	cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
 
 	data.blksz = blksz;
-	data.blocks = blocks;
+	/* Code in host drivers/fwk assumes that "blocks" always is >=1 */
+	data.blocks = blocks ? blocks : 1;
 	data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
 	data.sg = &sg;
 	data.sg_len = 1;
 
-	sg_init_one(&sg, buf, blksz * blocks);
+	sg_init_one(&sg, buf, data.blksz * data.blocks);
 
 	mmc_set_data_timeout(&data, card);
 
-- 
cgit v1.2.3


From df16219f365f7f5a2d88a6e123251d57255cca3f Mon Sep 17 00:00:00 2001
From: Giuseppe CAVALLARO <peppe.cavallaro@st.com>
Date: Fri, 4 Nov 2011 13:53:19 +0100
Subject: mmc: debugfs: expose the SDCLK frq in sys ios

This patch is to expose the actual SDCLK frequency in
/sys/kernel/debug/mmcX/ios entry.

For example, if the max clk for a normal speed card is 20MHz this
is reported in /sys/kernel/debug/mmcX/ios.  Unfortunately the actual
SDCLK frequency (i.e. Baseclock / divisor) is not reported at all:
for example, in that case, on Arasan HC, it should be 48/4=12 (MHz).

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/debugfs.c |  2 ++
 drivers/mmc/host/sdhci.c   | 10 ++++++++++
 include/linux/mmc/host.h   |  2 ++
 3 files changed, 14 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index 3923880118b6..027615d3bf3e 100644
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -57,6 +57,8 @@ static int mmc_ios_show(struct seq_file *s, void *data)
 	const char *str;
 
 	seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
+	if (host->actual_clock)
+		seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
 	seq_printf(s, "vdd:\t\t%u ", ios->vdd);
 	if ((1 << ios->vdd) & MMC_VDD_165_195)
 		seq_printf(s, "(1.65 - 1.95 V)\n");
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 19ed580f2cab..a7c23118dab2 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1066,12 +1066,15 @@ static void sdhci_finish_command(struct sdhci_host *host)
 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	int div = 0; /* Initialized for compiler warning */
+	int real_div = div, clk_mul = 1;
 	u16 clk = 0;
 	unsigned long timeout;
 
 	if (clock == host->clock)
 		return;
 
+	host->mmc->actual_clock = 0;
+
 	if (host->ops->set_clock) {
 		host->ops->set_clock(host, clock);
 		if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK)
@@ -1109,6 +1112,8 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 				 * Control register.
 				 */
 				clk = SDHCI_PROG_CLOCK_MODE;
+				real_div = div;
+				clk_mul = host->clk_mul;
 				div--;
 			}
 		} else {
@@ -1122,6 +1127,7 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 						break;
 				}
 			}
+			real_div = div;
 			div >>= 1;
 		}
 	} else {
@@ -1130,9 +1136,13 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 			if ((host->max_clk / div) <= clock)
 				break;
 		}
+		real_div = div;
 		div >>= 1;
 	}
 
+	if (real_div)
+		host->mmc->actual_clock = (host->max_clk * clk_mul) / real_div;
+
 	clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
 	clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
 		<< SDHCI_DIVIDER_HI_SHIFT;
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index a3ac9c48e5de..cea064f73514 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -323,6 +323,8 @@ struct mmc_host {
 	struct fault_attr	fail_mmc_request;
 #endif
 
+	unsigned int		actual_clock;	/* Actual HC clock rate */
+
 	unsigned long		private[0] ____cacheline_aligned;
 };
 
-- 
cgit v1.2.3


From c59d44739a8519cb7abdcd7cb7fd88f807dec9fd Mon Sep 17 00:00:00 2001
From: Chris Ball <cjb@laptop.org>
Date: Fri, 11 Nov 2011 22:01:43 -0500
Subject: mmc: card: Use manufacturer ID symbols in card quirks.

No functional change; adds macros for card manufacturer IDs.

Signed-off-by: Chris Ball <cjb@laptop.org>
Cc: Andrei E. Warkentin <andrey.warkentin@gmail.com>
Cc: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
---
 drivers/mmc/card/block.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 1e0e27cbe987..c80bb6de40b8 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1584,13 +1584,22 @@ static int mmc_add_disk(struct mmc_blk_data *md)
 	return ret;
 }
 
+#define CID_MANFID_SANDISK	0x2
+#define CID_MANFID_TOSHIBA	0x11
+#define CID_MANFID_MICRON	0x13
+
 static const struct mmc_fixup blk_fixups[] =
 {
-	MMC_FIXUP("SEM02G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
-	MMC_FIXUP("SEM04G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
-	MMC_FIXUP("SEM08G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
-	MMC_FIXUP("SEM16G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
-	MMC_FIXUP("SEM32G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
 
 	/*
 	 * Some MMC cards experience performance degradation with CMD23
@@ -1600,18 +1609,18 @@ static const struct mmc_fixup blk_fixups[] =
 	 *
 	 * N.B. This doesn't affect SD cards.
 	 */
-	MMC_FIXUP("MMC08G", 0x11, CID_OEMID_ANY, add_quirk_mmc,
+	MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
 		  MMC_QUIRK_BLK_NO_CMD23),
-	MMC_FIXUP("MMC16G", 0x11, CID_OEMID_ANY, add_quirk_mmc,
+	MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
 		  MMC_QUIRK_BLK_NO_CMD23),
-	MMC_FIXUP("MMC32G", 0x11, CID_OEMID_ANY, add_quirk_mmc,
+	MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
 		  MMC_QUIRK_BLK_NO_CMD23),
 
 	/*
 	 * Some Micron MMC cards needs longer data read timeout than
 	 * indicated in CSD.
 	 */
-	MMC_FIXUP(CID_NAME_ANY, 0x13, 0x200, add_quirk_mmc,
+	MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
 		  MMC_QUIRK_LONG_READ_TIME),
 
 	END_FIXUP
-- 
cgit v1.2.3


From 597dd9d79cfbbb1636d00a7fd0880355d9b20c41 Mon Sep 17 00:00:00 2001
From: Sujit Reddy Thumma <sthumma@codeaurora.org>
Date: Mon, 14 Nov 2011 13:53:29 +0530
Subject: mmc: core: Use delayed work in clock gating framework

Current clock gating framework disables the MCI clock as soon as the
request is completed and enables it when a request arrives. This aggressive
clock gating framework, when enabled, cause following issues:

When there are back-to-back requests from the Queue layer, we unnecessarily
end up disabling and enabling the clocks between these requests since 8MCLK
clock cycles is a very short duration compared to the time delay between
back to back requests reaching the MMC layer. This overhead can effect the
overall performance depending on how long the clock enable and disable
calls take which is platform dependent. For example on some platforms we
can have clock control not on the local processor, but on a different
subsystem and the time taken to perform the clock enable/disable can add
significant overhead.

Also if the host controller driver decides to disable the host clock too
when mmc_set_ios function is called with ios.clock=0, it adds additional
delay and it is highly possible that the next request had already arrived
and unnecessarily blocked in enabling the clocks. This is seen frequently
when the processor is executing at high speeds and in multi-core platforms
thus reduces the overall throughput compared to if clock gating is
disabled.

Fix this by delaying turning off the clocks by posting request on
delayed workqueue. Also cancel the unscheduled pending work, if any,
when there is access to card.

sysfs entry is provided to tune the delay as needed, default
value set to 200ms.

Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 Documentation/mmc/mmc-dev-attrs.txt | 10 +++++++
 drivers/mmc/core/host.c             | 57 ++++++++++++++++++++++++++++++++++---
 include/linux/mmc/host.h            |  4 ++-
 3 files changed, 66 insertions(+), 5 deletions(-)

(limited to 'drivers')

diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
index 8898a95b41e5..b0245565875a 100644
--- a/Documentation/mmc/mmc-dev-attrs.txt
+++ b/Documentation/mmc/mmc-dev-attrs.txt
@@ -64,3 +64,13 @@ Note on Erase Size and Preferred Erase Size:
 	size specified by the card.
 
 	"preferred_erase_size" is in bytes.
+
+SD/MMC/SDIO Clock Gating Attribute
+==================================
+
+Read and write access is provided to following attribute.
+This attribute appears only if CONFIG_MMC_CLKGATE is enabled.
+
+	clkgate_delay	Tune the clock gating delay with desired value in milli seconds.
+
+echo <desired delay> > /sys/class/mmc_host/mmcX/clkgate_delay
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index d31c78b72b0f..817a76039743 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -54,6 +54,31 @@ static DEFINE_IDR(mmc_host_idr);
 static DEFINE_SPINLOCK(mmc_host_lock);
 
 #ifdef CONFIG_MMC_CLKGATE
+static ssize_t clkgate_delay_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+	return snprintf(buf, PAGE_SIZE, "%lu millisecs\n",
+			host->clkgate_delay);
+}
+
+static ssize_t clkgate_delay_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+	unsigned long flags, value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	spin_lock_irqsave(&host->clk_lock, flags);
+	host->clkgate_delay = value;
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+
+	pr_info("%s: clock gate delay set to %lu ms\n",
+			mmc_hostname(host), value);
+	return count;
+}
 
 /*
  * Enabling clock gating will make the core call out to the host
@@ -114,7 +139,7 @@ static void mmc_host_clk_gate_delayed(struct mmc_host *host)
 static void mmc_host_clk_gate_work(struct work_struct *work)
 {
 	struct mmc_host *host = container_of(work, struct mmc_host,
-					      clk_gate_work);
+					      clk_gate_work.work);
 
 	mmc_host_clk_gate_delayed(host);
 }
@@ -131,6 +156,8 @@ void mmc_host_clk_hold(struct mmc_host *host)
 {
 	unsigned long flags;
 
+	/* cancel any clock gating work scheduled by mmc_host_clk_release() */
+	cancel_delayed_work_sync(&host->clk_gate_work);
 	mutex_lock(&host->clk_gate_mutex);
 	spin_lock_irqsave(&host->clk_lock, flags);
 	if (host->clk_gated) {
@@ -180,7 +207,8 @@ void mmc_host_clk_release(struct mmc_host *host)
 	host->clk_requests--;
 	if (mmc_host_may_gate_card(host->card) &&
 	    !host->clk_requests)
-		queue_work(system_nrt_wq, &host->clk_gate_work);
+		queue_delayed_work(system_nrt_wq, &host->clk_gate_work,
+				msecs_to_jiffies(host->clkgate_delay));
 	spin_unlock_irqrestore(&host->clk_lock, flags);
 }
 
@@ -213,8 +241,13 @@ static inline void mmc_host_clk_init(struct mmc_host *host)
 	host->clk_requests = 0;
 	/* Hold MCI clock for 8 cycles by default */
 	host->clk_delay = 8;
+	/*
+	 * Default clock gating delay is 200ms.
+	 * This value can be tuned by writing into sysfs entry.
+	 */
+	host->clkgate_delay = 200;
 	host->clk_gated = false;
-	INIT_WORK(&host->clk_gate_work, mmc_host_clk_gate_work);
+	INIT_DELAYED_WORK(&host->clk_gate_work, mmc_host_clk_gate_work);
 	spin_lock_init(&host->clk_lock);
 	mutex_init(&host->clk_gate_mutex);
 }
@@ -229,7 +262,7 @@ static inline void mmc_host_clk_exit(struct mmc_host *host)
 	 * Wait for any outstanding gate and then make sure we're
 	 * ungated before exiting.
 	 */
-	if (cancel_work_sync(&host->clk_gate_work))
+	if (cancel_delayed_work_sync(&host->clk_gate_work))
 		mmc_host_clk_gate_delayed(host);
 	if (host->clk_gated)
 		mmc_host_clk_hold(host);
@@ -237,6 +270,17 @@ static inline void mmc_host_clk_exit(struct mmc_host *host)
 	WARN_ON(host->clk_requests > 1);
 }
 
+static inline void mmc_host_clk_sysfs_init(struct mmc_host *host)
+{
+	host->clkgate_delay_attr.show = clkgate_delay_show;
+	host->clkgate_delay_attr.store = clkgate_delay_store;
+	sysfs_attr_init(&host->clkgate_delay_attr.attr);
+	host->clkgate_delay_attr.attr.name = "clkgate_delay";
+	host->clkgate_delay_attr.attr.mode = S_IRUGO | S_IWUSR;
+	if (device_create_file(&host->class_dev, &host->clkgate_delay_attr))
+		pr_err("%s: Failed to create clkgate_delay sysfs entry\n",
+				mmc_hostname(host));
+}
 #else
 
 static inline void mmc_host_clk_init(struct mmc_host *host)
@@ -247,6 +291,10 @@ static inline void mmc_host_clk_exit(struct mmc_host *host)
 {
 }
 
+static inline void mmc_host_clk_sysfs_init(struct mmc_host *host)
+{
+}
+
 #endif
 
 /**
@@ -335,6 +383,7 @@ int mmc_add_host(struct mmc_host *host)
 #ifdef CONFIG_DEBUG_FS
 	mmc_add_host_debugfs(host);
 #endif
+	mmc_host_clk_sysfs_init(host);
 
 	mmc_start_host(host);
 	register_pm_notifier(&host->pm_notify);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index cea064f73514..706f72279a17 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -253,10 +253,12 @@ struct mmc_host {
 	int			clk_requests;	/* internal reference counter */
 	unsigned int		clk_delay;	/* number of MCI clk hold cycles */
 	bool			clk_gated;	/* clock gated */
-	struct work_struct	clk_gate_work; /* delayed clock gate */
+	struct delayed_work	clk_gate_work; /* delayed clock gate */
 	unsigned int		clk_old;	/* old clock value cache */
 	spinlock_t		clk_lock;	/* lock for clk fields */
 	struct mutex		clk_gate_mutex;	/* mutex for clock gating */
+	struct device_attribute clkgate_delay_attr;
+	unsigned long           clkgate_delay;
 #endif
 
 	/* host specific block data */
-- 
cgit v1.2.3


From b70a7fab26db65f7daaf04f49a3bd673250f48c7 Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@st.com>
Date: Tue, 15 Nov 2011 16:24:40 +0530
Subject: mmc: sdhci-spear: Implement suspend/resume

Suspend/Resume is missing from sdhci-spear driver. This patch adds
support for suspend/resume for this driver.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-spear.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c
index 63cc8b6a1c9e..dee70b66305a 100644
--- a/drivers/mmc/host/sdhci-spear.c
+++ b/drivers/mmc/host/sdhci-spear.c
@@ -21,6 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/platform_device.h>
+#include <linux/pm.h>
 #include <linux/slab.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/sdhci-spear.h>
@@ -271,10 +272,49 @@ static int __devexit sdhci_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int sdhci_suspend(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct spear_sdhci *sdhci = dev_get_platdata(dev);
+	pm_message_t state = {.event = 0};
+	int ret;
+
+	ret = sdhci_suspend_host(host, state);
+	if (!ret)
+		clk_disable(sdhci->clk);
+
+	return ret;
+}
+
+static int sdhci_resume(struct device *dev)
+{
+	struct sdhci_host *host = dev_get_drvdata(dev);
+	struct spear_sdhci *sdhci = dev_get_platdata(dev);
+	int ret;
+
+	ret = clk_enable(sdhci->clk);
+	if (ret) {
+		dev_dbg(dev, "Resume: Error enabling clock\n");
+		return ret;
+	}
+
+	return sdhci_resume_host(host);
+}
+
+const struct dev_pm_ops sdhci_pm_ops = {
+	.suspend	= sdhci_suspend,
+	.resume		= sdhci_resume,
+};
+#endif
+
 static struct platform_driver sdhci_driver = {
 	.driver = {
 		.name	= "sdhci",
 		.owner	= THIS_MODULE,
+#ifdef CONFIG_PM
+		.pm	= &sdhci_pm_ops,
+#endif
 	},
 	.probe		= sdhci_probe,
 	.remove		= __devexit_p(sdhci_remove),
-- 
cgit v1.2.3


From a303c5319c8e6ab0e744ebca118da8420043b2c3 Mon Sep 17 00:00:00 2001
From: Philip Rakity <prakity@marvell.com>
Date: Mon, 14 Nov 2011 19:14:38 -0800
Subject: mmc: sdio: support SDIO UHS cards

This patch adds support for sdio UHS cards per the version 3.0
spec.

UHS mode is only enabled for version 3.0 cards when both the
host and the controller support UHS modes.

1.8v signaling support is removed if both the card and the
host do not support UHS.  This is done to maintain
compatibility and some system/card combinations break when
1.8v signaling is enabled when the host does not support UHS.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Aaron Lu <Aaron.lu@amd.com>
Reviewed-by: Arindam Nath <arindam.nath@amd.com>
Tested-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/bus.c   |   2 +-
 drivers/mmc/core/sd.c    |   2 +-
 drivers/mmc/core/sdio.c  | 329 +++++++++++++++++++++++++++++++++++++++++++----
 include/linux/mmc/card.h |   4 +-
 include/linux/mmc/sdio.h |  29 ++++-
 5 files changed, 336 insertions(+), 30 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 6be49249895a..f8a228a61fd4 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -305,7 +305,7 @@ int mmc_add_card(struct mmc_card *card)
 	} else {
 		printk(KERN_INFO "%s: new %s%s%s card at address %04x\n",
 			mmc_hostname(card->host),
-			mmc_sd_card_uhs(card) ? "ultra high speed " :
+			mmc_card_uhs(card) ? "ultra high speed " :
 			(mmc_card_highspeed(card) ? "high speed " : ""),
 			mmc_card_ddr_mode(card) ? "DDR " : "",
 			type, card->rca);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index f54392c4638a..85b858f6d5d4 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -960,7 +960,7 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 			goto free_card;
 
 		/* Card is an ultra-high-speed card */
-		mmc_sd_card_set_uhs(card);
+		mmc_card_set_uhs(card);
 
 		/*
 		 * Since initialization is now complete, enable preset
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 3ab565e32a6a..8c04f7f46dec 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -102,6 +102,7 @@ static int sdio_read_cccr(struct mmc_card *card)
 	int ret;
 	int cccr_vsn;
 	unsigned char data;
+	unsigned char speed;
 
 	memset(&card->cccr, 0, sizeof(struct sdio_cccr));
 
@@ -140,12 +141,60 @@ static int sdio_read_cccr(struct mmc_card *card)
 	}
 
 	if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
-		ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data);
+		ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
 		if (ret)
 			goto out;
 
-		if (data & SDIO_SPEED_SHS)
-			card->cccr.high_speed = 1;
+		card->scr.sda_spec3 = 0;
+		card->sw_caps.sd3_bus_mode = 0;
+		card->sw_caps.sd3_drv_type = 0;
+		if (cccr_vsn >= SDIO_CCCR_REV_3_00) {
+			card->scr.sda_spec3 = 1;
+			ret = mmc_io_rw_direct(card, 0, 0,
+				SDIO_CCCR_UHS, 0, &data);
+			if (ret)
+				goto out;
+
+			if (card->host->caps &
+				(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+				 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
+				 MMC_CAP_UHS_DDR50)) {
+				if (data & SDIO_UHS_DDR50)
+					card->sw_caps.sd3_bus_mode
+						|= SD_MODE_UHS_DDR50;
+
+				if (data & SDIO_UHS_SDR50)
+					card->sw_caps.sd3_bus_mode
+						|= SD_MODE_UHS_SDR50;
+
+				if (data & SDIO_UHS_SDR104)
+					card->sw_caps.sd3_bus_mode
+						|= SD_MODE_UHS_SDR104;
+			}
+
+			ret = mmc_io_rw_direct(card, 0, 0,
+				SDIO_CCCR_DRIVE_STRENGTH, 0, &data);
+			if (ret)
+				goto out;
+
+			if (data & SDIO_DRIVE_SDTA)
+				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A;
+			if (data & SDIO_DRIVE_SDTC)
+				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;
+			if (data & SDIO_DRIVE_SDTD)
+				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;
+		}
+
+		/* if no uhs mode ensure we check for high speed */
+		if (!card->sw_caps.sd3_bus_mode) {
+			if (speed & SDIO_SPEED_SHS) {
+				card->cccr.high_speed = 1;
+				card->sw_caps.hs_max_dtr = 50000000;
+			} else {
+				card->cccr.high_speed = 0;
+				card->sw_caps.hs_max_dtr = 25000000;
+			}
+		}
 	}
 
 out:
@@ -327,6 +376,193 @@ static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
 	return max_dtr;
 }
 
+static unsigned char host_drive_to_sdio_drive(int host_strength)
+{
+	switch (host_strength) {
+	case MMC_SET_DRIVER_TYPE_A:
+		return SDIO_DTSx_SET_TYPE_A;
+	case MMC_SET_DRIVER_TYPE_B:
+		return SDIO_DTSx_SET_TYPE_B;
+	case MMC_SET_DRIVER_TYPE_C:
+		return SDIO_DTSx_SET_TYPE_C;
+	case MMC_SET_DRIVER_TYPE_D:
+		return SDIO_DTSx_SET_TYPE_D;
+	default:
+		return SDIO_DTSx_SET_TYPE_B;
+	}
+}
+
+static void sdio_select_driver_type(struct mmc_card *card)
+{
+	int host_drv_type = SD_DRIVER_TYPE_B;
+	int card_drv_type = SD_DRIVER_TYPE_B;
+	int drive_strength;
+	unsigned char card_strength;
+	int err;
+
+	/*
+	 * If the host doesn't support any of the Driver Types A,C or D,
+	 * or there is no board specific handler then default Driver
+	 * Type B is used.
+	 */
+	if (!(card->host->caps &
+		(MMC_CAP_DRIVER_TYPE_A |
+		 MMC_CAP_DRIVER_TYPE_C |
+		 MMC_CAP_DRIVER_TYPE_D)))
+		return;
+
+	if (!card->host->ops->select_drive_strength)
+		return;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_A)
+		host_drv_type |= SD_DRIVER_TYPE_A;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_C)
+		host_drv_type |= SD_DRIVER_TYPE_C;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_D)
+		host_drv_type |= SD_DRIVER_TYPE_D;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
+		card_drv_type |= SD_DRIVER_TYPE_A;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+		card_drv_type |= SD_DRIVER_TYPE_C;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D)
+		card_drv_type |= SD_DRIVER_TYPE_D;
+
+	/*
+	 * The drive strength that the hardware can support
+	 * depends on the board design.  Pass the appropriate
+	 * information and let the hardware specific code
+	 * return what is possible given the options
+	 */
+	drive_strength = card->host->ops->select_drive_strength(
+		card->sw_caps.uhs_max_dtr,
+		host_drv_type, card_drv_type);
+
+	/* if error just use default for drive strength B */
+	err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0,
+		&card_strength);
+	if (err)
+		return;
+
+	card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT);
+	card_strength |= host_drive_to_sdio_drive(drive_strength);
+
+	err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
+		card_strength, NULL);
+
+	/* if error default to drive strength B */
+	if (!err)
+		mmc_set_driver_type(card->host, drive_strength);
+}
+
+
+static int sdio_set_bus_speed_mode(struct mmc_card *card)
+{
+	unsigned int bus_speed, timing;
+	int err;
+	unsigned char speed;
+
+	/*
+	 * If the host doesn't support any of the UHS-I modes, fallback on
+	 * default speed.
+	 */
+	if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+	    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)))
+		return 0;
+
+	bus_speed = SDIO_SPEED_SDR12;
+	timing = MMC_TIMING_UHS_SDR12;
+	if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
+	    (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
+			bus_speed = SDIO_SPEED_SDR104;
+			timing = MMC_TIMING_UHS_SDR104;
+			card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
+	} else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
+			bus_speed = SDIO_SPEED_DDR50;
+			timing = MMC_TIMING_UHS_DDR50;
+			card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR50)) {
+			bus_speed = SDIO_SPEED_SDR50;
+			timing = MMC_TIMING_UHS_SDR50;
+			card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
+			bus_speed = SDIO_SPEED_SDR25;
+			timing = MMC_TIMING_UHS_SDR25;
+			card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
+		    MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR12)) {
+			bus_speed = SDIO_SPEED_SDR12;
+			timing = MMC_TIMING_UHS_SDR12;
+			card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
+	}
+
+	err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
+	if (err)
+		return err;
+
+	speed &= ~SDIO_SPEED_BSS_MASK;
+	speed |= bus_speed;
+	err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
+	if (err)
+		return err;
+
+	if (bus_speed) {
+		mmc_set_timing(card->host, timing);
+		mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
+	}
+
+	return 0;
+}
+
+/*
+ * UHS-I specific initialization procedure
+ */
+static int mmc_sdio_init_uhs_card(struct mmc_card *card)
+{
+	int err;
+
+	if (!card->scr.sda_spec3)
+		return 0;
+
+	/*
+	 * Switch to wider bus (if supported).
+	 */
+	if (card->host->caps & MMC_CAP_4_BIT_DATA) {
+		err = sdio_enable_4bit_bus(card);
+		if (err > 0) {
+			mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+			err = 0;
+		}
+	}
+
+	/* Set the driver strength for the card */
+	sdio_select_driver_type(card);
+
+	/* Set bus speed mode of the card */
+	err = sdio_set_bus_speed_mode(card);
+	if (err)
+		goto out;
+
+	/* Initialize and start re-tuning timer */
+	if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning)
+		err = card->host->ops->execute_tuning(card->host);
+
+out:
+
+	return err;
+}
+
 /*
  * Handle the detection and initialisation of a card.
  *
@@ -393,6 +629,30 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 	if (host->ops->init_card)
 		host->ops->init_card(host, card);
 
+	/*
+	 * If the host and card support UHS-I mode request the card
+	 * to switch to 1.8V signaling level.  No 1.8v signalling if
+	 * UHS mode is not enabled to maintain compatibilty and some
+	 * systems that claim 1.8v signalling in fact do not support
+	 * it.
+	 */
+	if ((ocr & R4_18V_PRESENT) &&
+		(host->caps &
+			(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+			 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
+			 MMC_CAP_UHS_DDR50))) {
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180,
+				true);
+		if (err) {
+			ocr &= ~R4_18V_PRESENT;
+			host->ocr &= ~R4_18V_PRESENT;
+		}
+		err = 0;
+	} else {
+		ocr &= ~R4_18V_PRESENT;
+		host->ocr &= ~R4_18V_PRESENT;
+	}
+
 	/*
 	 * For native busses:  set card RCA and quit open drain mode.
 	 */
@@ -492,29 +752,39 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 	if (err)
 		goto remove;
 
-	/*
-	 * Switch to high-speed (if supported).
-	 */
-	err = sdio_enable_hs(card);
-	if (err > 0)
-		mmc_sd_go_highspeed(card);
-	else if (err)
-		goto remove;
+	/* Initialization sequence for UHS-I cards */
+	/* Only if card supports 1.8v and UHS signaling */
+	if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) {
+		err = mmc_sdio_init_uhs_card(card);
+		if (err)
+			goto remove;
 
-	/*
-	 * Change to the card's maximum speed.
-	 */
-	mmc_set_clock(host, mmc_sdio_get_max_clock(card));
+		/* Card is an ultra-high-speed card */
+		mmc_card_set_uhs(card);
+	} else {
+		/*
+		 * Switch to high-speed (if supported).
+		 */
+		err = sdio_enable_hs(card);
+		if (err > 0)
+			mmc_sd_go_highspeed(card);
+		else if (err)
+			goto remove;
 
-	/*
-	 * Switch to wider bus (if supported).
-	 */
-	err = sdio_enable_4bit_bus(card);
-	if (err > 0)
-		mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
-	else if (err)
-		goto remove;
+		/*
+		 * Change to the card's maximum speed.
+		 */
+		mmc_set_clock(host, mmc_sdio_get_max_clock(card));
 
+		/*
+		 * Switch to wider bus (if supported).
+		 */
+		err = sdio_enable_4bit_bus(card);
+		if (err > 0)
+			mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+		else if (err)
+			goto remove;
+	}
 finish:
 	if (!oldcard)
 		host->card = card;
@@ -797,8 +1067,17 @@ int mmc_attach_sdio(struct mmc_host *host)
 	 * Detect and init the card.
 	 */
 	err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
-	if (err)
-		goto err;
+	if (err) {
+		if (err == -EAGAIN) {
+			/*
+			 * Retry initialization with S18R set to 0.
+			 */
+			host->ocr &= ~R4_18V_PRESENT;
+			err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
+		}
+		if (err)
+			goto err;
+	}
 	card = host->card;
 
 	/*
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 2c9be29684cf..534974c3ef0c 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -367,7 +367,8 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_card_highspeed(c)	((c)->state & MMC_STATE_HIGHSPEED)
 #define mmc_card_blockaddr(c)	((c)->state & MMC_STATE_BLOCKADDR)
 #define mmc_card_ddr_mode(c)	((c)->state & MMC_STATE_HIGHSPEED_DDR)
-#define mmc_sd_card_uhs(c) ((c)->state & MMC_STATE_ULTRAHIGHSPEED)
+#define mmc_card_uhs(c)		((c)->state & MMC_STATE_ULTRAHIGHSPEED)
+#define mmc_sd_card_uhs(c)	((c)->state & MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_card_ext_capacity(c) ((c)->state & MMC_CARD_SDXC)
 
 #define mmc_card_set_present(c)	((c)->state |= MMC_STATE_PRESENT)
@@ -375,6 +376,7 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_card_set_highspeed(c) ((c)->state |= MMC_STATE_HIGHSPEED)
 #define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR)
 #define mmc_card_set_ddr_mode(c) ((c)->state |= MMC_STATE_HIGHSPEED_DDR)
+#define mmc_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_sd_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC)
 
diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h
index e0b1123497b9..c9fe66c58f8f 100644
--- a/include/linux/mmc/sdio.h
+++ b/include/linux/mmc/sdio.h
@@ -38,6 +38,7 @@
  *      [8:0] Byte/block count
  */
 
+#define R4_18V_PRESENT (1<<24)
 #define R4_MEMORY_PRESENT (1 << 27)
 
 /*
@@ -85,6 +86,7 @@
 #define  SDIO_SD_REV_1_01	0	/* SD Physical Spec Version 1.01 */
 #define  SDIO_SD_REV_1_10	1	/* SD Physical Spec Version 1.10 */
 #define  SDIO_SD_REV_2_00	2	/* SD Physical Spec Version 2.00 */
+#define  SDIO_SD_REV_3_00	3	/* SD Physical Spev Version 3.00 */
 
 #define SDIO_CCCR_IOEx		0x02
 #define SDIO_CCCR_IORx		0x03
@@ -134,8 +136,31 @@
 #define SDIO_CCCR_SPEED		0x13
 
 #define  SDIO_SPEED_SHS		0x01	/* Supports High-Speed mode */
-#define  SDIO_SPEED_EHS		0x02	/* Enable High-Speed mode */
-
+#define  SDIO_SPEED_BSS_SHIFT	1
+#define  SDIO_SPEED_BSS_MASK	(7<<SDIO_SPEED_BSS_SHIFT)
+#define  SDIO_SPEED_SDR12	(0<<SDIO_SPEED_BSS_SHIFT)
+#define  SDIO_SPEED_SDR25	(1<<SDIO_SPEED_BSS_SHIFT)
+#define  SDIO_SPEED_SDR50	(2<<SDIO_SPEED_BSS_SHIFT)
+#define  SDIO_SPEED_SDR104	(3<<SDIO_SPEED_BSS_SHIFT)
+#define  SDIO_SPEED_DDR50	(4<<SDIO_SPEED_BSS_SHIFT)
+#define  SDIO_SPEED_EHS		SDIO_SPEED_SDR25	/* Enable High-Speed */
+
+#define SDIO_CCCR_UHS		0x14
+#define  SDIO_UHS_SDR50		0x01
+#define  SDIO_UHS_SDR104	0x02
+#define  SDIO_UHS_DDR50		0x04
+
+#define SDIO_CCCR_DRIVE_STRENGTH 0x15
+#define  SDIO_SDTx_MASK		0x07
+#define  SDIO_DRIVE_SDTA	(1<<0)
+#define  SDIO_DRIVE_SDTC	(1<<1)
+#define  SDIO_DRIVE_SDTD	(1<<2)
+#define  SDIO_DRIVE_DTSx_MASK	0x03
+#define  SDIO_DRIVE_DTSx_SHIFT	4
+#define  SDIO_DTSx_SET_TYPE_B	(0 << SDIO_DRIVE_DTSx_SHIFT)
+#define  SDIO_DTSx_SET_TYPE_A	(1 << SDIO_DRIVE_DTSx_SHIFT)
+#define  SDIO_DTSx_SET_TYPE_C	(2 << SDIO_DRIVE_DTSx_SHIFT)
+#define  SDIO_DTSx_SET_TYPE_D	(3 << SDIO_DRIVE_DTSx_SHIFT)
 /*
  * Function Basic Registers (FBR)
  */
-- 
cgit v1.2.3


From 5a09262744a0b84719b933ac66801de058776755 Mon Sep 17 00:00:00 2001
From: Per Forlin <per.forlin@stericsson.com>
Date: Mon, 14 Nov 2011 12:02:28 +0100
Subject: mmc: mmci: add capabilities2 for MMC_CAP2

Signed-off-by: Per Forlin <per.forlin@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/mmci.c   | 1 +
 include/linux/amba/mmci.h | 2 ++
 2 files changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 50b5f9926f64..8eabf999a858 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1239,6 +1239,7 @@ static int __devinit mmci_probe(struct amba_device *dev,
 	if (host->vcc == NULL)
 		mmc->ocr_avail = plat->ocr_mask;
 	mmc->caps = plat->capabilities;
+	mmc->caps2 = plat->capabilities2;
 
 	/*
 	 * We can do SGIO
diff --git a/include/linux/amba/mmci.h b/include/linux/amba/mmci.h
index 21114810c7c0..0101e9c17fa1 100644
--- a/include/linux/amba/mmci.h
+++ b/include/linux/amba/mmci.h
@@ -30,6 +30,7 @@ struct dma_chan;
  * @cd_invert: true if the gpio_cd pin value is active low
  * @capabilities: the capabilities of the block as implemented in
  * this platform, signify anything MMC_CAP_* from mmc/host.h
+ * @capabilities2: more capabilities, MMC_CAP2_* from mmc/host.h
  * @dma_filter: function used to select an appropriate RX and TX
  * DMA channel to be used for DMA, if and only if you're deploying the
  * generic DMA engine
@@ -52,6 +53,7 @@ struct mmci_platform_data {
 	int	gpio_cd;
 	bool	cd_invert;
 	unsigned long capabilities;
+	unsigned long capabilities2;
 	bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
 	void *dma_rx_param;
 	void *dma_tx_param;
-- 
cgit v1.2.3


From 739c69c964fb4c040df451ef2e4cd6ea4f8b8e2d Mon Sep 17 00:00:00 2001
From: Per Forlin <per.forlin@stericsson.com>
Date: Mon, 14 Nov 2011 12:04:24 +0100
Subject: mmc: mmc_test: align max_seg_size

If max_seg_size is unaligned, mmc_test_map_sg() may create sg element
sizes that are not aligned with 512 byte. Fix, align max_seg_size at
mmc_test_area_init().

Signed-off-by: Per Forlin <per.forlin@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/card/mmc_test.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers')

diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index b038c4a9468b..584899889e8f 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -1581,6 +1581,7 @@ static int mmc_test_area_init(struct mmc_test_card *test, int erase, int fill)
 
 	t->max_segs = test->card->host->max_segs;
 	t->max_seg_sz = test->card->host->max_seg_size;
+	t->max_seg_sz -= t->max_seg_sz % 512;
 
 	t->max_tfr = t->max_sz;
 	if (t->max_tfr >> 9 > test->card->host->max_blk_count)
-- 
cgit v1.2.3


From 4ee5ebaf74ba1b3e2e3f9aad442bf38db96c20d2 Mon Sep 17 00:00:00 2001
From: Tony Lin <tony.lin@freescale.com>
Date: Tue, 22 Nov 2011 14:42:30 +0800
Subject: mmc: sdhci-esdhc: Change delay after setting clock from 100ms to 1ms

1ms is enough for hardware to change the clock to stable.
100ms is too long in the tasklet.

Signed-off-by: Tony Lin <tony.lin@freescale.com>
CC: Xiaobo Xie <X.Xie@freescale.com>
CC: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-esdhc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
index c3b08f111942..b97b2f5dafdb 100644
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ b/drivers/mmc/host/sdhci-esdhc.h
@@ -73,7 +73,7 @@ static inline void esdhc_set_clock(struct sdhci_host *host, unsigned int clock)
 		| (div << ESDHC_DIVIDER_SHIFT)
 		| (pre_div << ESDHC_PREDIV_SHIFT));
 	sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
-	mdelay(100);
+	mdelay(1);
 out:
 	host->clock = clock;
 }
-- 
cgit v1.2.3


From 4d6144de8ba263eb3691a737c547e5b2fdc45287 Mon Sep 17 00:00:00 2001
From: Johan Rudholm <johan.rudholm@stericsson.com>
Date: Wed, 23 Nov 2011 09:05:58 +0100
Subject: mmc: core: check for zero length ioctl data

If the read or write buffer size associated with the command sent
through the mmc_blk_ioctl is zero, do not prepare data buffer.

This enables a ioctl(2) call to for instance send a MMC_SWITCH to set
a byte in the ext_csd.

Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/card/block.c | 82 ++++++++++++++++++++++++++----------------------
 1 file changed, 45 insertions(+), 37 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index c80bb6de40b8..ad0fb8d74dda 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -266,6 +266,9 @@ static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
 		goto idata_err;
 	}
 
+	if (!idata->buf_bytes)
+		return idata;
+
 	idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
 	if (!idata->buf) {
 		err = -ENOMEM;
@@ -312,25 +315,6 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
 	if (IS_ERR(idata))
 		return PTR_ERR(idata);
 
-	cmd.opcode = idata->ic.opcode;
-	cmd.arg = idata->ic.arg;
-	cmd.flags = idata->ic.flags;
-
-	data.sg = &sg;
-	data.sg_len = 1;
-	data.blksz = idata->ic.blksz;
-	data.blocks = idata->ic.blocks;
-
-	sg_init_one(data.sg, idata->buf, idata->buf_bytes);
-
-	if (idata->ic.write_flag)
-		data.flags = MMC_DATA_WRITE;
-	else
-		data.flags = MMC_DATA_READ;
-
-	mrq.cmd = &cmd;
-	mrq.data = &data;
-
 	md = mmc_blk_get(bdev->bd_disk);
 	if (!md) {
 		err = -EINVAL;
@@ -343,6 +327,48 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
 		goto cmd_done;
 	}
 
+	cmd.opcode = idata->ic.opcode;
+	cmd.arg = idata->ic.arg;
+	cmd.flags = idata->ic.flags;
+
+	if (idata->buf_bytes) {
+		data.sg = &sg;
+		data.sg_len = 1;
+		data.blksz = idata->ic.blksz;
+		data.blocks = idata->ic.blocks;
+
+		sg_init_one(data.sg, idata->buf, idata->buf_bytes);
+
+		if (idata->ic.write_flag)
+			data.flags = MMC_DATA_WRITE;
+		else
+			data.flags = MMC_DATA_READ;
+
+		/* data.flags must already be set before doing this. */
+		mmc_set_data_timeout(&data, card);
+
+		/* Allow overriding the timeout_ns for empirical tuning. */
+		if (idata->ic.data_timeout_ns)
+			data.timeout_ns = idata->ic.data_timeout_ns;
+
+		if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
+			/*
+			 * Pretend this is a data transfer and rely on the
+			 * host driver to compute timeout.  When all host
+			 * drivers support cmd.cmd_timeout for R1B, this
+			 * can be changed to:
+			 *
+			 *     mrq.data = NULL;
+			 *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
+			 */
+			data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
+		}
+
+		mrq.data = &data;
+	}
+
+	mrq.cmd = &cmd;
+
 	mmc_claim_host(card->host);
 
 	if (idata->ic.is_acmd) {
@@ -351,24 +377,6 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
 			goto cmd_rel_host;
 	}
 
-	/* data.flags must already be set before doing this. */
-	mmc_set_data_timeout(&data, card);
-	/* Allow overriding the timeout_ns for empirical tuning. */
-	if (idata->ic.data_timeout_ns)
-		data.timeout_ns = idata->ic.data_timeout_ns;
-
-	if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
-		/*
-		 * Pretend this is a data transfer and rely on the host driver
-		 * to compute timeout.  When all host drivers support
-		 * cmd.cmd_timeout for R1B, this can be changed to:
-		 *
-		 *     mrq.data = NULL;
-		 *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
-		 */
-		data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
-	}
-
 	mmc_wait_for_req(card->host, &mrq);
 
 	if (cmd.error) {
-- 
cgit v1.2.3


From 86df174585de79a460e3515ec413ea1f5a0bcf68 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Wed, 23 Nov 2011 15:52:30 +0100
Subject: mmc: sh_mmcif: simplify clock divisor calculation

Replace ilog2(__rounddown_pow_of_two(x)) with the equivalent but much
simpler fls(x) - 1.

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sh_mmcif.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index d5505f3fe2a1..2ec23b0053b6 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -16,6 +16,7 @@
  *
  */
 
+#include <linux/bitops.h>
 #include <linux/clk.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
@@ -399,7 +400,7 @@ static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
 		sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK);
 	else
 		sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR &
-			(ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16));
+				((fls(host->clk / clk) - 1) << 16));
 
 	sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
 }
-- 
cgit v1.2.3


From 6601056a96034fa08120b10b8dc728f213f91ec4 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Thu, 24 Nov 2011 16:29:17 +0100
Subject: mmc: Remove redundant spi driver bus initialization

In ancient times it was necessary to manually initialize the bus field of an
spi_driver to spi_bus_type. These days this is done in spi_driver_register(),
so we can drop the manual assignment.

The patch was generated using the following coccinelle semantic patch:
// <smpl>
@@
identifier _driver;
@@
struct spi_driver _driver = {
	.driver = {
-		.bus = &spi_bus_type,
	},
};
// </smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/mmc_spi.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 92946b84e9fa..273306c68d58 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1525,7 +1525,6 @@ static struct of_device_id mmc_spi_of_match_table[] __devinitdata = {
 static struct spi_driver mmc_spi_driver = {
 	.driver = {
 		.name =		"mmc_spi",
-		.bus =		&spi_bus_type,
 		.owner =	THIS_MODULE,
 		.of_match_table = mmc_spi_of_match_table,
 	},
-- 
cgit v1.2.3


From d1f81a64a4250bdd776978be06ae2b8e13ec7471 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@gmail.com>
Date: Sat, 26 Nov 2011 12:55:43 +0800
Subject: mmc: convert drivers/mmc/host/* to use module_platform_driver()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This patch converts the drivers in drivers/mmc/host/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Acked-by: David Brown <davidb@codeaurora.org>
Acked-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/bfin_sdh.c        | 12 +-----------
 drivers/mmc/host/cb710-mmc.c       | 13 +------------
 drivers/mmc/host/jz4740_mmc.c      | 12 +-----------
 drivers/mmc/host/msm_sdcc.c        | 13 +------------
 drivers/mmc/host/mxcmmc.c          | 13 +------------
 drivers/mmc/host/mxs-mmc.c         | 13 +------------
 drivers/mmc/host/pxamci.c          | 13 +------------
 drivers/mmc/host/s3cmci.c          | 13 +------------
 drivers/mmc/host/sdhci-cns3xxx.c   | 12 +-----------
 drivers/mmc/host/sdhci-dove.c      | 12 +-----------
 drivers/mmc/host/sdhci-esdhc-imx.c | 12 +-----------
 drivers/mmc/host/sdhci-of-esdhc.c  | 12 +-----------
 drivers/mmc/host/sdhci-of-hlwd.c   | 12 +-----------
 drivers/mmc/host/sdhci-pxav2.c     | 12 +-----------
 drivers/mmc/host/sdhci-pxav3.c     | 12 +-----------
 drivers/mmc/host/sdhci-s3c.c       | 13 +------------
 drivers/mmc/host/sdhci-spear.c     | 12 +-----------
 drivers/mmc/host/sdhci-tegra.c     | 12 +-----------
 drivers/mmc/host/sh_mmcif.c        | 14 +-------------
 drivers/mmc/host/sh_mobile_sdhi.c  | 13 +------------
 drivers/mmc/host/tmio_mmc.c        | 14 +-------------
 21 files changed, 21 insertions(+), 243 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/bfin_sdh.c b/drivers/mmc/host/bfin_sdh.c
index 0371bf502249..03666174ca48 100644
--- a/drivers/mmc/host/bfin_sdh.c
+++ b/drivers/mmc/host/bfin_sdh.c
@@ -627,17 +627,7 @@ static struct platform_driver sdh_driver = {
 	},
 };
 
-static int __init sdh_init(void)
-{
-	return platform_driver_register(&sdh_driver);
-}
-module_init(sdh_init);
-
-static void __exit sdh_exit(void)
-{
-	platform_driver_unregister(&sdh_driver);
-}
-module_exit(sdh_exit);
+module_platform_driver(sdh_driver);
 
 MODULE_DESCRIPTION("Blackfin Secure Digital Host Driver");
 MODULE_AUTHOR("Cliff Cai, Roy Huang");
diff --git a/drivers/mmc/host/cb710-mmc.c b/drivers/mmc/host/cb710-mmc.c
index ce2a47b71dd6..83693fd7c6b3 100644
--- a/drivers/mmc/host/cb710-mmc.c
+++ b/drivers/mmc/host/cb710-mmc.c
@@ -780,18 +780,7 @@ static struct platform_driver cb710_mmc_driver = {
 #endif
 };
 
-static int __init cb710_mmc_init_module(void)
-{
-	return platform_driver_register(&cb710_mmc_driver);
-}
-
-static void __exit cb710_mmc_cleanup_module(void)
-{
-	platform_driver_unregister(&cb710_mmc_driver);
-}
-
-module_init(cb710_mmc_init_module);
-module_exit(cb710_mmc_cleanup_module);
+module_platform_driver(cb710_mmc_driver);
 
 MODULE_AUTHOR("Michał Mirosław <mirq-linux@rere.qmqm.pl>");
 MODULE_DESCRIPTION("ENE CB710 memory card reader driver - MMC/SD part");
diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
index 74218ad677e4..c8852a8128a9 100644
--- a/drivers/mmc/host/jz4740_mmc.c
+++ b/drivers/mmc/host/jz4740_mmc.c
@@ -1012,17 +1012,7 @@ static struct platform_driver jz4740_mmc_driver = {
 	},
 };
 
-static int __init jz4740_mmc_init(void)
-{
-	return platform_driver_register(&jz4740_mmc_driver);
-}
-module_init(jz4740_mmc_init);
-
-static void __exit jz4740_mmc_exit(void)
-{
-	platform_driver_unregister(&jz4740_mmc_driver);
-}
-module_exit(jz4740_mmc_exit);
+module_platform_driver(jz4740_mmc_driver);
 
 MODULE_DESCRIPTION("JZ4740 SD/MMC controller driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index 80d8eb143b48..475596653c19 100644
--- a/drivers/mmc/host/msm_sdcc.c
+++ b/drivers/mmc/host/msm_sdcc.c
@@ -1480,18 +1480,7 @@ static struct platform_driver msmsdcc_driver = {
 	},
 };
 
-static int __init msmsdcc_init(void)
-{
-	return platform_driver_register(&msmsdcc_driver);
-}
-
-static void __exit msmsdcc_exit(void)
-{
-	platform_driver_unregister(&msmsdcc_driver);
-}
-
-module_init(msmsdcc_init);
-module_exit(msmsdcc_exit);
+module_platform_driver(msmsdcc_driver);
 
 MODULE_DESCRIPTION("Qualcomm MSM 7X00A Multimedia Card Interface driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 8e0fbe994047..7088b40f9579 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -1047,18 +1047,7 @@ static struct platform_driver mxcmci_driver = {
 	}
 };
 
-static int __init mxcmci_init(void)
-{
-	return platform_driver_register(&mxcmci_driver);
-}
-
-static void __exit mxcmci_exit(void)
-{
-	platform_driver_unregister(&mxcmci_driver);
-}
-
-module_init(mxcmci_init);
-module_exit(mxcmci_exit);
+module_platform_driver(mxcmci_driver);
 
 MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver");
 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 99b449d26a4d..cf18fc2b24cd 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -855,18 +855,7 @@ static struct platform_driver mxs_mmc_driver = {
 	},
 };
 
-static int __init mxs_mmc_init(void)
-{
-	return platform_driver_register(&mxs_mmc_driver);
-}
-
-static void __exit mxs_mmc_exit(void)
-{
-	platform_driver_unregister(&mxs_mmc_driver);
-}
-
-module_init(mxs_mmc_init);
-module_exit(mxs_mmc_exit);
+module_platform_driver(mxs_mmc_driver);
 
 MODULE_DESCRIPTION("FREESCALE MXS MMC peripheral");
 MODULE_AUTHOR("Freescale Semiconductor");
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index fc4356e00d46..cb2dc0e75ba7 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -872,18 +872,7 @@ static struct platform_driver pxamci_driver = {
 	},
 };
 
-static int __init pxamci_init(void)
-{
-	return platform_driver_register(&pxamci_driver);
-}
-
-static void __exit pxamci_exit(void)
-{
-	platform_driver_unregister(&pxamci_driver);
-}
-
-module_init(pxamci_init);
-module_exit(pxamci_exit);
+module_platform_driver(pxamci_driver);
 
 MODULE_DESCRIPTION("PXA Multimedia Card Interface Driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index 720f99334a7f..1bcfd6dbb5cc 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -1914,18 +1914,7 @@ static struct platform_driver s3cmci_driver = {
 	.shutdown	= s3cmci_shutdown,
 };
 
-static int __init s3cmci_init(void)
-{
-	return platform_driver_register(&s3cmci_driver);
-}
-
-static void __exit s3cmci_exit(void)
-{
-	platform_driver_unregister(&s3cmci_driver);
-}
-
-module_init(s3cmci_init);
-module_exit(s3cmci_exit);
+module_platform_driver(s3cmci_driver);
 
 MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver");
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/sdhci-cns3xxx.c b/drivers/mmc/host/sdhci-cns3xxx.c
index b4257e700617..28a870804f60 100644
--- a/drivers/mmc/host/sdhci-cns3xxx.c
+++ b/drivers/mmc/host/sdhci-cns3xxx.c
@@ -115,17 +115,7 @@ static struct platform_driver sdhci_cns3xxx_driver = {
 	.remove		= __devexit_p(sdhci_cns3xxx_remove),
 };
 
-static int __init sdhci_cns3xxx_init(void)
-{
-	return platform_driver_register(&sdhci_cns3xxx_driver);
-}
-module_init(sdhci_cns3xxx_init);
-
-static void __exit sdhci_cns3xxx_exit(void)
-{
-	platform_driver_unregister(&sdhci_cns3xxx_driver);
-}
-module_exit(sdhci_cns3xxx_exit);
+module_platform_driver(sdhci_cns3xxx_driver);
 
 MODULE_DESCRIPTION("SDHCI driver for CNS3xxx");
 MODULE_AUTHOR("Scott Shu, "
diff --git a/drivers/mmc/host/sdhci-dove.c b/drivers/mmc/host/sdhci-dove.c
index a81312c91f70..46fd1fd1b605 100644
--- a/drivers/mmc/host/sdhci-dove.c
+++ b/drivers/mmc/host/sdhci-dove.c
@@ -88,17 +88,7 @@ static struct platform_driver sdhci_dove_driver = {
 	.remove		= __devexit_p(sdhci_dove_remove),
 };
 
-static int __init sdhci_dove_init(void)
-{
-	return platform_driver_register(&sdhci_dove_driver);
-}
-module_init(sdhci_dove_init);
-
-static void __exit sdhci_dove_exit(void)
-{
-	platform_driver_unregister(&sdhci_dove_driver);
-}
-module_exit(sdhci_dove_exit);
+module_platform_driver(sdhci_dove_driver);
 
 MODULE_DESCRIPTION("SDHCI driver for Dove");
 MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 38ebc4ea259f..d601e41af282 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -606,17 +606,7 @@ static struct platform_driver sdhci_esdhc_imx_driver = {
 	.remove		= __devexit_p(sdhci_esdhc_imx_remove),
 };
 
-static int __init sdhci_esdhc_imx_init(void)
-{
-	return platform_driver_register(&sdhci_esdhc_imx_driver);
-}
-module_init(sdhci_esdhc_imx_init);
-
-static void __exit sdhci_esdhc_imx_exit(void)
-{
-	platform_driver_unregister(&sdhci_esdhc_imx_driver);
-}
-module_exit(sdhci_esdhc_imx_exit);
+module_platform_driver(sdhci_esdhc_imx_driver);
 
 MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC");
 MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 01e5f627e0f0..ff4adc018041 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -131,17 +131,7 @@ static struct platform_driver sdhci_esdhc_driver = {
 	.remove = __devexit_p(sdhci_esdhc_remove),
 };
 
-static int __init sdhci_esdhc_init(void)
-{
-	return platform_driver_register(&sdhci_esdhc_driver);
-}
-module_init(sdhci_esdhc_init);
-
-static void __exit sdhci_esdhc_exit(void)
-{
-	platform_driver_unregister(&sdhci_esdhc_driver);
-}
-module_exit(sdhci_esdhc_exit);
+module_platform_driver(sdhci_esdhc_driver);
 
 MODULE_DESCRIPTION("SDHCI OF driver for Freescale MPC eSDHC");
 MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, "
diff --git a/drivers/mmc/host/sdhci-of-hlwd.c b/drivers/mmc/host/sdhci-of-hlwd.c
index 3619adc7d9fc..0ce088ae0228 100644
--- a/drivers/mmc/host/sdhci-of-hlwd.c
+++ b/drivers/mmc/host/sdhci-of-hlwd.c
@@ -93,17 +93,7 @@ static struct platform_driver sdhci_hlwd_driver = {
 	.remove = __devexit_p(sdhci_hlwd_remove),
 };
 
-static int __init sdhci_hlwd_init(void)
-{
-	return platform_driver_register(&sdhci_hlwd_driver);
-}
-module_init(sdhci_hlwd_init);
-
-static void __exit sdhci_hlwd_exit(void)
-{
-	platform_driver_unregister(&sdhci_hlwd_driver);
-}
-module_exit(sdhci_hlwd_exit);
+module_platform_driver(sdhci_hlwd_driver);
 
 MODULE_DESCRIPTION("Nintendo Wii SDHCI OF driver");
 MODULE_AUTHOR("The GameCube Linux Team, Albert Herranz");
diff --git a/drivers/mmc/host/sdhci-pxav2.c b/drivers/mmc/host/sdhci-pxav2.c
index 7a039c3cb1f1..dbb75bfbcffb 100644
--- a/drivers/mmc/host/sdhci-pxav2.c
+++ b/drivers/mmc/host/sdhci-pxav2.c
@@ -223,18 +223,8 @@ static struct platform_driver sdhci_pxav2_driver = {
 	.probe		= sdhci_pxav2_probe,
 	.remove		= __devexit_p(sdhci_pxav2_remove),
 };
-static int __init sdhci_pxav2_init(void)
-{
-	return platform_driver_register(&sdhci_pxav2_driver);
-}
-
-static void __exit sdhci_pxav2_exit(void)
-{
-	platform_driver_unregister(&sdhci_pxav2_driver);
-}
 
-module_init(sdhci_pxav2_init);
-module_exit(sdhci_pxav2_exit);
+module_platform_driver(sdhci_pxav2_driver);
 
 MODULE_DESCRIPTION("SDHCI driver for pxav2");
 MODULE_AUTHOR("Marvell International Ltd.");
diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
index 15673a7ee6a5..f29695683556 100644
--- a/drivers/mmc/host/sdhci-pxav3.c
+++ b/drivers/mmc/host/sdhci-pxav3.c
@@ -269,18 +269,8 @@ static struct platform_driver sdhci_pxav3_driver = {
 	.probe		= sdhci_pxav3_probe,
 	.remove		= __devexit_p(sdhci_pxav3_remove),
 };
-static int __init sdhci_pxav3_init(void)
-{
-	return platform_driver_register(&sdhci_pxav3_driver);
-}
-
-static void __exit sdhci_pxav3_exit(void)
-{
-	platform_driver_unregister(&sdhci_pxav3_driver);
-}
 
-module_init(sdhci_pxav3_init);
-module_exit(sdhci_pxav3_exit);
+module_platform_driver(sdhci_pxav3_driver);
 
 MODULE_DESCRIPTION("SDHCI driver for pxav3");
 MODULE_AUTHOR("Marvell International Ltd.");
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index 0d33ff0d67fb..55c1e870da83 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -657,18 +657,7 @@ static struct platform_driver sdhci_s3c_driver = {
 	},
 };
 
-static int __init sdhci_s3c_init(void)
-{
-	return platform_driver_register(&sdhci_s3c_driver);
-}
-
-static void __exit sdhci_s3c_exit(void)
-{
-	platform_driver_unregister(&sdhci_s3c_driver);
-}
-
-module_init(sdhci_s3c_init);
-module_exit(sdhci_s3c_exit);
+module_platform_driver(sdhci_s3c_driver);
 
 MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue");
 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c
index dee70b66305a..883548eaa09e 100644
--- a/drivers/mmc/host/sdhci-spear.c
+++ b/drivers/mmc/host/sdhci-spear.c
@@ -320,17 +320,7 @@ static struct platform_driver sdhci_driver = {
 	.remove		= __devexit_p(sdhci_remove),
 };
 
-static int __init sdhci_init(void)
-{
-	return platform_driver_register(&sdhci_driver);
-}
-module_init(sdhci_init);
-
-static void __exit sdhci_exit(void)
-{
-	platform_driver_unregister(&sdhci_driver);
-}
-module_exit(sdhci_exit);
+module_platform_driver(sdhci_driver);
 
 MODULE_DESCRIPTION("SPEAr Secure Digital Host Controller Interface driver");
 MODULE_AUTHOR("Viresh Kumar <viresh.kumar@st.com>");
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index e2e18d3f949c..78a36eba4df0 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -324,17 +324,7 @@ static struct platform_driver sdhci_tegra_driver = {
 	.remove		= __devexit_p(sdhci_tegra_remove),
 };
 
-static int __init sdhci_tegra_init(void)
-{
-	return platform_driver_register(&sdhci_tegra_driver);
-}
-module_init(sdhci_tegra_init);
-
-static void __exit sdhci_tegra_exit(void)
-{
-	platform_driver_unregister(&sdhci_tegra_driver);
-}
-module_exit(sdhci_tegra_exit);
+module_platform_driver(sdhci_tegra_driver);
 
 MODULE_DESCRIPTION("SDHCI driver for Tegra");
 MODULE_AUTHOR(" Google, Inc.");
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 2ec23b0053b6..7bec007bcefa 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -1207,19 +1207,7 @@ static struct platform_driver sh_mmcif_driver = {
 	},
 };
 
-static int __init sh_mmcif_init(void)
-{
-	return platform_driver_register(&sh_mmcif_driver);
-}
-
-static void __exit sh_mmcif_exit(void)
-{
-	platform_driver_unregister(&sh_mmcif_driver);
-}
-
-module_init(sh_mmcif_init);
-module_exit(sh_mmcif_exit);
-
+module_platform_driver(sh_mmcif_driver);
 
 MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 41ae6466bd83..58da3c44acc5 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -282,18 +282,7 @@ static struct platform_driver sh_mobile_sdhi_driver = {
 	.remove		= __devexit_p(sh_mobile_sdhi_remove),
 };
 
-static int __init sh_mobile_sdhi_init(void)
-{
-	return platform_driver_register(&sh_mobile_sdhi_driver);
-}
-
-static void __exit sh_mobile_sdhi_exit(void)
-{
-	platform_driver_unregister(&sh_mobile_sdhi_driver);
-}
-
-module_init(sh_mobile_sdhi_init);
-module_exit(sh_mobile_sdhi_exit);
+module_platform_driver(sh_mobile_sdhi_driver);
 
 MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
 MODULE_AUTHOR("Magnus Damm");
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index a4ea10242787..113ce6c9cf32 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -138,19 +138,7 @@ static struct platform_driver tmio_mmc_driver = {
 	.resume = tmio_mmc_resume,
 };
 
-
-static int __init tmio_mmc_init(void)
-{
-	return platform_driver_register(&tmio_mmc_driver);
-}
-
-static void __exit tmio_mmc_exit(void)
-{
-	platform_driver_unregister(&tmio_mmc_driver);
-}
-
-module_init(tmio_mmc_init);
-module_exit(tmio_mmc_exit);
+module_platform_driver(tmio_mmc_driver);
 
 MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
-- 
cgit v1.2.3


From 482fce997e143a8d5429406fe066d31aa76ef70a Mon Sep 17 00:00:00 2001
From: Cong Wang <amwang@redhat.com>
Date: Sun, 27 Nov 2011 13:27:00 +0800
Subject: mmc: remove the second argument of k[un]map_atomic()

Signed-off-by: Cong Wang <amwang@redhat.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/at91_mci.c |  8 ++++----
 drivers/mmc/host/msm_sdcc.c |  6 +++---
 drivers/mmc/host/sdhci.c    |  4 ++--
 drivers/mmc/host/tifm_sd.c  | 16 ++++++++--------
 drivers/mmc/host/tmio_mmc.h |  4 ++--
 5 files changed, 19 insertions(+), 19 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index a8b4d2aa18e5..9a32922265e5 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -236,7 +236,7 @@ static inline void at91_mci_sg_to_dma(struct at91mci_host *host, struct mmc_data
 
 		sg = &data->sg[i];
 
-		sgbuffer = kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
+		sgbuffer = kmap_atomic(sg_page(sg)) + sg->offset;
 		amount = min(size, sg->length);
 		size -= amount;
 
@@ -252,7 +252,7 @@ static inline void at91_mci_sg_to_dma(struct at91mci_host *host, struct mmc_data
 			dmabuf = (unsigned *)tmpv;
 		}
 
-		kunmap_atomic(sgbuffer, KM_BIO_SRC_IRQ);
+		kunmap_atomic(sgbuffer);
 
 		if (size == 0)
 			break;
@@ -302,7 +302,7 @@ static void at91_mci_post_dma_read(struct at91mci_host *host)
 
 		sg = &data->sg[i];
 
-		sgbuffer = kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
+		sgbuffer = kmap_atomic(sg_page(sg)) + sg->offset;
 		amount = min(size, sg->length);
 		size -= amount;
 
@@ -318,7 +318,7 @@ static void at91_mci_post_dma_read(struct at91mci_host *host)
 		}
 
 		flush_kernel_dcache_page(sg_page(sg));
-		kunmap_atomic(sgbuffer, KM_BIO_SRC_IRQ);
+		kunmap_atomic(sgbuffer);
 		data->bytes_xfered += amount;
 		if (size == 0)
 			break;
diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
index 475596653c19..1d14cda95e56 100644
--- a/drivers/mmc/host/msm_sdcc.c
+++ b/drivers/mmc/host/msm_sdcc.c
@@ -689,8 +689,8 @@ msmsdcc_pio_irq(int irq, void *dev_id)
 
 		/* Map the current scatter buffer */
 		local_irq_save(flags);
-		buffer = kmap_atomic(sg_page(host->pio.sg),
-				     KM_BIO_SRC_IRQ) + host->pio.sg->offset;
+		buffer = kmap_atomic(sg_page(host->pio.sg))
+				     + host->pio.sg->offset;
 		buffer += host->pio.sg_off;
 		remain = host->pio.sg->length - host->pio.sg_off;
 		len = 0;
@@ -700,7 +700,7 @@ msmsdcc_pio_irq(int irq, void *dev_id)
 			len = msmsdcc_pio_write(host, buffer, remain, status);
 
 		/* Unmap the buffer */
-		kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
+		kunmap_atomic(buffer);
 		local_irq_restore(flags);
 
 		host->pio.sg_off += len;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index a7c23118dab2..ab6018fc2338 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -423,12 +423,12 @@ static void sdhci_transfer_pio(struct sdhci_host *host)
 static char *sdhci_kmap_atomic(struct scatterlist *sg, unsigned long *flags)
 {
 	local_irq_save(*flags);
-	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
+	return kmap_atomic(sg_page(sg)) + sg->offset;
 }
 
 static void sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
 {
-	kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
+	kunmap_atomic(buffer);
 	local_irq_restore(*flags);
 }
 
diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c
index f70d04664cac..fc00081687b9 100644
--- a/drivers/mmc/host/tifm_sd.c
+++ b/drivers/mmc/host/tifm_sd.c
@@ -118,7 +118,7 @@ static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg,
 	unsigned char *buf;
 	unsigned int pos = 0, val;
 
-	buf = kmap_atomic(pg, KM_BIO_DST_IRQ) + off;
+	buf = kmap_atomic(pg) + off;
 	if (host->cmd_flags & DATA_CARRY) {
 		buf[pos++] = host->bounce_buf_data[0];
 		host->cmd_flags &= ~DATA_CARRY;
@@ -134,7 +134,7 @@ static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg,
 		}
 		buf[pos++] = (val >> 8) & 0xff;
 	}
-	kunmap_atomic(buf - off, KM_BIO_DST_IRQ);
+	kunmap_atomic(buf - off);
 }
 
 static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg,
@@ -144,7 +144,7 @@ static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg,
 	unsigned char *buf;
 	unsigned int pos = 0, val;
 
-	buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + off;
+	buf = kmap_atomic(pg) + off;
 	if (host->cmd_flags & DATA_CARRY) {
 		val = host->bounce_buf_data[0] | ((buf[pos++] << 8) & 0xff00);
 		writel(val, sock->addr + SOCK_MMCSD_DATA);
@@ -161,7 +161,7 @@ static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg,
 		val |= (buf[pos++] << 8) & 0xff00;
 		writel(val, sock->addr + SOCK_MMCSD_DATA);
 	}
-	kunmap_atomic(buf - off, KM_BIO_SRC_IRQ);
+	kunmap_atomic(buf - off);
 }
 
 static void tifm_sd_transfer_data(struct tifm_sd *host)
@@ -212,13 +212,13 @@ static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off,
 			      struct page *src, unsigned int src_off,
 			      unsigned int count)
 {
-	unsigned char *src_buf = kmap_atomic(src, KM_BIO_SRC_IRQ) + src_off;
-	unsigned char *dst_buf = kmap_atomic(dst, KM_BIO_DST_IRQ) + dst_off;
+	unsigned char *src_buf = kmap_atomic(src) + src_off;
+	unsigned char *dst_buf = kmap_atomic(dst) + dst_off;
 
 	memcpy(dst_buf, src_buf, count);
 
-	kunmap_atomic(dst_buf - dst_off, KM_BIO_DST_IRQ);
-	kunmap_atomic(src_buf - src_off, KM_BIO_SRC_IRQ);
+	kunmap_atomic(dst_buf - dst_off);
+	kunmap_atomic(src_buf - src_off);
 }
 
 static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data)
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 3020f98218f0..a95e6d901726 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -105,13 +105,13 @@ static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 					 unsigned long *flags)
 {
 	local_irq_save(*flags);
-	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
+	return kmap_atomic(sg_page(sg)) + sg->offset;
 }
 
 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
 					  unsigned long *flags, void *virt)
 {
-	kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
+	kunmap_atomic(virt - sg->offset);
 	local_irq_restore(*flags);
 }
 
-- 
cgit v1.2.3


From d30495048892980e5d453328d1cc9343b3f7e917 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Mon, 28 Nov 2011 16:22:00 +0200
Subject: mmc: allow upper layers to know immediately if card has been removed

Add a function mmc_detect_card_removed() which upper layers can use to
determine immediately if a card has been removed. This function should
be called after an I/O request fails so that all queued I/O requests
can be errored out immediately instead of waiting for the card device
to be removed.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/core.c  | 51 +++++++++++++++++++++++++++++++++++++++++++++---
 drivers/mmc/core/core.h  |  3 +++
 drivers/mmc/core/mmc.c   | 12 +++++++++++-
 drivers/mmc/core/sd.c    | 12 +++++++++++-
 drivers/mmc/core/sdio.c  | 11 ++++++++++-
 include/linux/mmc/card.h |  3 +++
 include/linux/mmc/core.h |  2 ++
 include/linux/mmc/host.h |  1 +
 8 files changed, 89 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 950b97d7412a..a2aa860956ef 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -140,7 +140,7 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
 			cmd->retries = 0;
 	}
 
-	if (err && cmd->retries) {
+	if (err && cmd->retries && !mmc_card_removed(host->card)) {
 		/*
 		 * Request starter must handle retries - see
 		 * mmc_wait_for_req_done().
@@ -247,6 +247,11 @@ static void __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
 {
 	init_completion(&mrq->completion);
 	mrq->done = mmc_wait_done;
+	if (mmc_card_removed(host->card)) {
+		mrq->cmd->error = -ENOMEDIUM;
+		complete(&mrq->completion);
+		return;
+	}
 	mmc_start_request(host, mrq);
 }
 
@@ -259,7 +264,8 @@ static void mmc_wait_for_req_done(struct mmc_host *host,
 		wait_for_completion(&mrq->completion);
 
 		cmd = mrq->cmd;
-		if (!cmd->error || !cmd->retries)
+		if (!cmd->error || !cmd->retries ||
+		    mmc_card_removed(host->card))
 			break;
 
 		pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
@@ -1456,7 +1462,7 @@ void mmc_detect_change(struct mmc_host *host, unsigned long delay)
 	WARN_ON(host->removed);
 	spin_unlock_irqrestore(&host->lock, flags);
 #endif
-
+	host->detect_change = 1;
 	mmc_schedule_delayed_work(&host->detect, delay);
 }
 
@@ -2049,6 +2055,43 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
 	return -EIO;
 }
 
+int _mmc_detect_card_removed(struct mmc_host *host)
+{
+	int ret;
+
+	if ((host->caps & MMC_CAP_NONREMOVABLE) || !host->bus_ops->alive)
+		return 0;
+
+	if (!host->card || mmc_card_removed(host->card))
+		return 1;
+
+	ret = host->bus_ops->alive(host);
+	if (ret) {
+		mmc_card_set_removed(host->card);
+		pr_debug("%s: card remove detected\n", mmc_hostname(host));
+	}
+
+	return ret;
+}
+
+int mmc_detect_card_removed(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+
+	WARN_ON(!host->claimed);
+	/*
+	 * The card will be considered unchanged unless we have been asked to
+	 * detect a change or host requires polling to provide card detection.
+	 */
+	if (card && !host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL))
+		return mmc_card_removed(card);
+
+	host->detect_change = 0;
+
+	return _mmc_detect_card_removed(host);
+}
+EXPORT_SYMBOL(mmc_detect_card_removed);
+
 void mmc_rescan(struct work_struct *work)
 {
 	static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
@@ -2069,6 +2112,8 @@ void mmc_rescan(struct work_struct *work)
 	    && !(host->caps & MMC_CAP_NONREMOVABLE))
 		host->bus_ops->detect(host);
 
+	host->detect_change = 0;
+
 	/*
 	 * Let mmc_bus_put() free the bus/bus_ops if we've found that
 	 * the card is no longer present.
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 14664f1fb16f..34009241213c 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -24,6 +24,7 @@ struct mmc_bus_ops {
 	int (*resume)(struct mmc_host *);
 	int (*power_save)(struct mmc_host *);
 	int (*power_restore)(struct mmc_host *);
+	int (*alive)(struct mmc_host *);
 };
 
 void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
@@ -59,6 +60,8 @@ void mmc_rescan(struct work_struct *work);
 void mmc_start_host(struct mmc_host *host);
 void mmc_stop_host(struct mmc_host *host);
 
+int _mmc_detect_card_removed(struct mmc_host *host);
+
 int mmc_attach_mmc(struct mmc_host *host);
 int mmc_attach_sd(struct mmc_host *host);
 int mmc_attach_sdio(struct mmc_host *host);
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index d240427c1246..fc1059bb6a08 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1104,6 +1104,14 @@ static void mmc_remove(struct mmc_host *host)
 	host->card = NULL;
 }
 
+/*
+ * Card detection - card is alive.
+ */
+static int mmc_alive(struct mmc_host *host)
+{
+	return mmc_send_status(host->card, NULL);
+}
+
 /*
  * Card detection callback from host.
  */
@@ -1119,7 +1127,7 @@ static void mmc_detect(struct mmc_host *host)
 	/*
 	 * Just check if our card has been removed.
 	 */
-	err = mmc_send_status(host->card, NULL);
+	err = _mmc_detect_card_removed(host);
 
 	mmc_release_host(host);
 
@@ -1224,6 +1232,7 @@ static const struct mmc_bus_ops mmc_ops = {
 	.suspend = NULL,
 	.resume = NULL,
 	.power_restore = mmc_power_restore,
+	.alive = mmc_alive,
 };
 
 static const struct mmc_bus_ops mmc_ops_unsafe = {
@@ -1234,6 +1243,7 @@ static const struct mmc_bus_ops mmc_ops_unsafe = {
 	.suspend = mmc_suspend,
 	.resume = mmc_resume,
 	.power_restore = mmc_power_restore,
+	.alive = mmc_alive,
 };
 
 static void mmc_attach_bus_ops(struct mmc_host *host)
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 85b858f6d5d4..6f27d35081b8 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -1018,6 +1018,14 @@ static void mmc_sd_remove(struct mmc_host *host)
 	host->card = NULL;
 }
 
+/*
+ * Card detection - card is alive.
+ */
+static int mmc_sd_alive(struct mmc_host *host)
+{
+	return mmc_send_status(host->card, NULL);
+}
+
 /*
  * Card detection callback from host.
  */
@@ -1033,7 +1041,7 @@ static void mmc_sd_detect(struct mmc_host *host)
 	/*
 	 * Just check if our card has been removed.
 	 */
-	err = mmc_send_status(host->card, NULL);
+	err = _mmc_detect_card_removed(host);
 
 	mmc_release_host(host);
 
@@ -1102,6 +1110,7 @@ static const struct mmc_bus_ops mmc_sd_ops = {
 	.suspend = NULL,
 	.resume = NULL,
 	.power_restore = mmc_sd_power_restore,
+	.alive = mmc_sd_alive,
 };
 
 static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
@@ -1110,6 +1119,7 @@ static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
 	.suspend = mmc_sd_suspend,
 	.resume = mmc_sd_resume,
 	.power_restore = mmc_sd_power_restore,
+	.alive = mmc_sd_alive,
 };
 
 static void mmc_sd_attach_bus_ops(struct mmc_host *host)
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 8c04f7f46dec..b77f770ce5d1 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -819,6 +819,14 @@ static void mmc_sdio_remove(struct mmc_host *host)
 	host->card = NULL;
 }
 
+/*
+ * Card detection - card is alive.
+ */
+static int mmc_sdio_alive(struct mmc_host *host)
+{
+	return mmc_select_card(host->card);
+}
+
 /*
  * Card detection callback from host.
  */
@@ -841,7 +849,7 @@ static void mmc_sdio_detect(struct mmc_host *host)
 	/*
 	 * Just check if our card has been removed.
 	 */
-	err = mmc_select_card(host->card);
+	err = _mmc_detect_card_removed(host);
 
 	mmc_release_host(host);
 
@@ -1019,6 +1027,7 @@ static const struct mmc_bus_ops mmc_sdio_ops = {
 	.suspend = mmc_sdio_suspend,
 	.resume = mmc_sdio_resume,
 	.power_restore = mmc_sdio_power_restore,
+	.alive = mmc_sdio_alive,
 };
 
 
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 534974c3ef0c..6402d9224d6a 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -209,6 +209,7 @@ struct mmc_card {
 #define MMC_STATE_HIGHSPEED_DDR (1<<4)		/* card is in high speed mode */
 #define MMC_STATE_ULTRAHIGHSPEED (1<<5)		/* card is in ultra high speed mode */
 #define MMC_CARD_SDXC		(1<<6)		/* card is SDXC */
+#define MMC_CARD_REMOVED	(1<<7)		/* card has been removed */
 	unsigned int		quirks; 	/* card quirks */
 #define MMC_QUIRK_LENIENT_FN0	(1<<0)		/* allow SDIO FN0 writes outside of the VS CCCR range */
 #define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1)	/* use func->cur_blksize */
@@ -370,6 +371,7 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_card_uhs(c)		((c)->state & MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_sd_card_uhs(c)	((c)->state & MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_card_ext_capacity(c) ((c)->state & MMC_CARD_SDXC)
+#define mmc_card_removed(c)	((c) && ((c)->state & MMC_CARD_REMOVED))
 
 #define mmc_card_set_present(c)	((c)->state |= MMC_STATE_PRESENT)
 #define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
@@ -379,6 +381,7 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_sd_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
 #define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC)
+#define mmc_card_set_removed(c) ((c)->state |= MMC_CARD_REMOVED)
 
 /*
  * Quirk add/remove for MMC products.
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 174a844a5dda..87a976cc5654 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -180,6 +180,8 @@ extern int mmc_try_claim_host(struct mmc_host *host);
 
 extern int mmc_flush_cache(struct mmc_card *);
 
+extern int mmc_detect_card_removed(struct mmc_host *host);
+
 /**
  *	mmc_claim_host - exclusively claim a host
  *	@host: mmc host to claim
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 706f72279a17..9a03d0335745 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -299,6 +299,7 @@ struct mmc_host {
 	int			claim_cnt;	/* "claim" nesting count */
 
 	struct delayed_work	detect;
+	int			detect_change;	/* card detect flag */
 
 	const struct mmc_bus_ops *bus_ops;	/* current bus driver */
 	unsigned int		bus_refs;	/* reference counter */
-- 
cgit v1.2.3


From fa1773cc5b78faa1ef0ab1ab0f48bce7bc72cec5 Mon Sep 17 00:00:00 2001
From: Sangwook Lee <sangwook.lee@linaro.org>
Date: Mon, 7 Nov 2011 17:05:22 +0000
Subject: mmc: sdhci-s3c: Add pm_caps into SD/MMC host

sdhci-s3c updates pm_caps from platform data for SDIO PM.

Signed-off-by: Sangwook Lee <sangwook.lee@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-s3c.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index 55c1e870da83..b6558b829a9c 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -524,6 +524,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
 	if (pdata->host_caps)
 		host->mmc->caps |= pdata->host_caps;
 
+	if (pdata->pm_caps)
+		host->mmc->pm_caps |= pdata->pm_caps;
+
 	host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR |
 			 SDHCI_QUIRK_32BIT_DMA_SIZE);
 
-- 
cgit v1.2.3


From add710eaa88606de8ba98a014d37178579e6dbaf Mon Sep 17 00:00:00 2001
From: Johan Rudholm <johan.rudholm@stericsson.com>
Date: Fri, 2 Dec 2011 08:51:06 +0100
Subject: mmc: boot partition ro lock support

Enable boot partitions to be read-only locked until next power on via
a sysfs entry. There will be one sysfs entry for each boot partition:

/sys/block/mmcblkXbootY/ro_lock_until_next_power_on

Each boot partition is locked by writing 1 to its file.

Signed-off-by: Johan Rudholm <johan.rudholm@stericsson.com>
Signed-off-by: John Beckett <john.beckett@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 Documentation/mmc/mmc-dev-parts.txt |  13 ++++
 drivers/mmc/card/block.c            | 121 +++++++++++++++++++++++++++++++++---
 drivers/mmc/core/mmc.c              |  14 ++++-
 include/linux/mmc/card.h            |  10 ++-
 include/linux/mmc/mmc.h             |   6 ++
 5 files changed, 153 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/Documentation/mmc/mmc-dev-parts.txt b/Documentation/mmc/mmc-dev-parts.txt
index 2db28b8e662f..f08d078d43cf 100644
--- a/Documentation/mmc/mmc-dev-parts.txt
+++ b/Documentation/mmc/mmc-dev-parts.txt
@@ -25,3 +25,16 @@ echo 0 > /sys/block/mmcblkXbootY/force_ro
 To re-enable read-only access:
 
 echo 1 > /sys/block/mmcblkXbootY/force_ro
+
+The boot partitions can also be locked read only until the next power on,
+with:
+
+echo 1 > /sys/block/mmcblkXbootY/ro_lock_until_next_power_on
+
+This is a feature of the card and not of the kernel. If the card does
+not support boot partition locking, the file will not exist. If the
+feature has been disabled on the card, the file will be read-only.
+
+The boot partitions can also be locked permanently, but this feature is
+not accessible through sysfs in order to avoid accidental or malicious
+bricking.
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index ad0fb8d74dda..0c959c96005e 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -107,6 +107,8 @@ struct mmc_blk_data {
 	 */
 	unsigned int	part_curr;
 	struct device_attribute force_ro;
+	struct device_attribute power_ro_lock;
+	int	area_type;
 };
 
 static DEFINE_MUTEX(open_lock);
@@ -165,6 +167,70 @@ static void mmc_blk_put(struct mmc_blk_data *md)
 	mutex_unlock(&open_lock);
 }
 
+static ssize_t power_ro_lock_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	int ret;
+	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
+	struct mmc_card *card = md->queue.card;
+	int locked = 0;
+
+	if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
+		locked = 2;
+	else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
+		locked = 1;
+
+	ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
+
+	return ret;
+}
+
+static ssize_t power_ro_lock_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	int ret;
+	struct mmc_blk_data *md, *part_md;
+	struct mmc_card *card;
+	unsigned long set;
+
+	if (kstrtoul(buf, 0, &set))
+		return -EINVAL;
+
+	if (set != 1)
+		return count;
+
+	md = mmc_blk_get(dev_to_disk(dev));
+	card = md->queue.card;
+
+	mmc_claim_host(card->host);
+
+	ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
+				card->ext_csd.boot_ro_lock |
+				EXT_CSD_BOOT_WP_B_PWR_WP_EN,
+				card->ext_csd.part_time);
+	if (ret)
+		pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
+	else
+		card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
+
+	mmc_release_host(card->host);
+
+	if (!ret) {
+		pr_info("%s: Locking boot partition ro until next power on\n",
+			md->disk->disk_name);
+		set_disk_ro(md->disk, 1);
+
+		list_for_each_entry(part_md, &md->part, part)
+			if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
+				pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
+				set_disk_ro(part_md->disk, 1);
+			}
+	}
+
+	mmc_blk_put(md);
+	return count;
+}
+
 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
@@ -1347,7 +1413,8 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 					      struct device *parent,
 					      sector_t size,
 					      bool default_ro,
-					      const char *subname)
+					      const char *subname,
+					      int area_type)
 {
 	struct mmc_blk_data *md;
 	int devidx, ret;
@@ -1372,11 +1439,12 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 	if (!subname) {
 		md->name_idx = find_first_zero_bit(name_use, max_devices);
 		__set_bit(md->name_idx, name_use);
-	}
-	else
+	} else
 		md->name_idx = ((struct mmc_blk_data *)
 				dev_to_disk(parent)->private_data)->name_idx;
 
+	md->area_type = area_type;
+
 	/*
 	 * Set the read-only status based on the supported commands
 	 * and the write protect switch.
@@ -1470,7 +1538,8 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 		size = card->csd.capacity << (card->csd.read_blkbits - 9);
 	}
 
-	md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL);
+	md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
+					MMC_BLK_DATA_AREA_MAIN);
 	return md;
 }
 
@@ -1479,13 +1548,14 @@ static int mmc_blk_alloc_part(struct mmc_card *card,
 			      unsigned int part_type,
 			      sector_t size,
 			      bool default_ro,
-			      const char *subname)
+			      const char *subname,
+			      int area_type)
 {
 	char cap_str[10];
 	struct mmc_blk_data *part_md;
 
 	part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
-				    subname);
+				    subname, area_type);
 	if (IS_ERR(part_md))
 		return PTR_ERR(part_md);
 	part_md->part_type = part_type;
@@ -1518,7 +1588,8 @@ static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
 				card->part[idx].part_cfg,
 				card->part[idx].size >> 9,
 				card->part[idx].force_ro,
-				card->part[idx].name);
+				card->part[idx].name,
+				card->part[idx].area_type);
 			if (ret)
 				return ret;
 		}
@@ -1547,9 +1618,16 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card)
 
 static void mmc_blk_remove_req(struct mmc_blk_data *md)
 {
+	struct mmc_card *card;
+
 	if (md) {
+		card = md->queue.card;
 		if (md->disk->flags & GENHD_FL_UP) {
 			device_remove_file(disk_to_dev(md->disk), &md->force_ro);
+			if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
+					card->ext_csd.boot_ro_lockable)
+				device_remove_file(disk_to_dev(md->disk),
+					&md->power_ro_lock);
 
 			/* Stop new requests from getting into the queue */
 			del_gendisk(md->disk);
@@ -1578,6 +1656,7 @@ static void mmc_blk_remove_parts(struct mmc_card *card,
 static int mmc_add_disk(struct mmc_blk_data *md)
 {
 	int ret;
+	struct mmc_card *card = md->queue.card;
 
 	add_disk(md->disk);
 	md->force_ro.show = force_ro_show;
@@ -1587,7 +1666,33 @@ static int mmc_add_disk(struct mmc_blk_data *md)
 	md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
 	ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
 	if (ret)
-		del_gendisk(md->disk);
+		goto force_ro_fail;
+
+	if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
+	     card->ext_csd.boot_ro_lockable) {
+		mode_t mode;
+
+		if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
+			mode = S_IRUGO;
+		else
+			mode = S_IRUGO | S_IWUSR;
+
+		md->power_ro_lock.show = power_ro_lock_show;
+		md->power_ro_lock.store = power_ro_lock_store;
+		md->power_ro_lock.attr.mode = mode;
+		md->power_ro_lock.attr.name =
+					"ro_lock_until_next_power_on";
+		ret = device_create_file(disk_to_dev(md->disk),
+				&md->power_ro_lock);
+		if (ret)
+			goto power_ro_lock_fail;
+	}
+	return ret;
+
+power_ro_lock_fail:
+	device_remove_file(disk_to_dev(md->disk), &md->force_ro);
+force_ro_fail:
+	del_gendisk(md->disk);
 
 	return ret;
 }
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index fc1059bb6a08..006e932a3ae3 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -348,7 +348,8 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 				part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
 				mmc_part_add(card, part_size,
 					EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
-					"boot%d", idx, true);
+					"boot%d", idx, true,
+					MMC_BLK_DATA_AREA_BOOT);
 			}
 		}
 	}
@@ -435,7 +436,8 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 					hc_wp_grp_sz);
 				mmc_part_add(card, part_size << 19,
 					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
-					"gp%d", idx, false);
+					"gp%d", idx, false,
+					MMC_BLK_DATA_AREA_GP);
 			}
 		}
 		card->ext_csd.sec_trim_mult =
@@ -446,6 +448,14 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 			ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 		card->ext_csd.trim_timeout = 300 *
 			ext_csd[EXT_CSD_TRIM_MULT];
+
+		/*
+		 * Note that the call to mmc_part_add above defaults to read
+		 * only. If this default assumption is changed, the call must
+		 * take into account the value of boot_locked below.
+		 */
+		card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
+		card->ext_csd.boot_ro_lockable = true;
 	}
 
 	if (card->ext_csd.rev >= 5) {
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 6402d9224d6a..9478a6bf1bb1 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -71,6 +71,8 @@ struct mmc_ext_csd {
 	bool			hpi_en;			/* HPI enablebit */
 	bool			hpi;			/* HPI support bit */
 	unsigned int		hpi_cmd;		/* cmd used as HPI */
+	unsigned int		boot_ro_lock;		/* ro lock support */
+	bool			boot_ro_lockable;
 	u8			raw_partition_support;	/* 160 */
 	u8			raw_erased_mem_count;	/* 181 */
 	u8			raw_ext_csd_structure;	/* 194 */
@@ -187,6 +189,10 @@ struct mmc_part {
 	unsigned int	part_cfg;	/* partition type */
 	char	name[MAX_MMC_PART_NAME_LEN];
 	bool	force_ro;	/* to make boot parts RO by default */
+	unsigned int	area_type;
+#define MMC_BLK_DATA_AREA_MAIN	(1<<0)
+#define MMC_BLK_DATA_AREA_BOOT	(1<<1)
+#define MMC_BLK_DATA_AREA_GP	(1<<2)
 };
 
 /*
@@ -265,12 +271,14 @@ struct mmc_card {
  * This function fill contents in mmc_part.
  */
 static inline void mmc_part_add(struct mmc_card *card, unsigned int size,
-			unsigned int part_cfg, char *name, int idx, bool ro)
+			unsigned int part_cfg, char *name, int idx, bool ro,
+			int area_type)
 {
 	card->part[card->nr_parts].size = size;
 	card->part[card->nr_parts].part_cfg = part_cfg;
 	sprintf(card->part[card->nr_parts].name, name, idx);
 	card->part[card->nr_parts].force_ro = ro;
+	card->part[card->nr_parts].area_type = area_type;
 	card->nr_parts++;
 }
 
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 0e7135697d11..665548e639e8 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -280,6 +280,7 @@ struct _mmc_csd {
 #define EXT_CSD_RST_N_FUNCTION		162	/* R/W */
 #define EXT_CSD_SANITIZE_START		165     /* W */
 #define EXT_CSD_WR_REL_PARAM		166	/* RO */
+#define EXT_CSD_BOOT_WP			173	/* R/W */
 #define EXT_CSD_ERASE_GROUP_DEF		175	/* R/W */
 #define EXT_CSD_PART_CONFIG		179	/* R/W */
 #define EXT_CSD_ERASED_MEM_CONT		181	/* RO */
@@ -321,6 +322,11 @@ struct _mmc_csd {
 
 #define EXT_CSD_WR_REL_PARAM_EN		(1<<2)
 
+#define EXT_CSD_BOOT_WP_B_PWR_WP_DIS	(0x40)
+#define EXT_CSD_BOOT_WP_B_PERM_WP_DIS	(0x10)
+#define EXT_CSD_BOOT_WP_B_PERM_WP_EN	(0x04)
+#define EXT_CSD_BOOT_WP_B_PWR_WP_EN	(0x01)
+
 #define EXT_CSD_PART_CONFIG_ACC_MASK	(0x7)
 #define EXT_CSD_PART_CONFIG_ACC_BOOT0	(0x1)
 #define EXT_CSD_PART_CONFIG_ACC_GP0	(0x4)
-- 
cgit v1.2.3


From b678b91f22debd5f8efa04895652989004761d06 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@gmail.com>
Date: Sat, 3 Dec 2011 15:28:05 +0800
Subject: mmc: sdhci-pci: simplify error handling

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-pci.c | 38 ++++++++++++++++++--------------------
 1 file changed, 18 insertions(+), 20 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 6878a94626bc..d2e77fb21b26 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -1012,11 +1012,8 @@ static int sdhci_pci_suspend(struct device *dev)
 
 		ret = sdhci_suspend_host(slot->host);
 
-		if (ret) {
-			for (i--; i >= 0; i--)
-				sdhci_resume_host(chip->slots[i]->host);
-			return ret;
-		}
+		if (ret)
+			goto err_pci_suspend;
 
 		slot_pm_flags = slot->host->mmc->pm_flags;
 		if (slot_pm_flags & MMC_PM_WAKE_SDIO_IRQ)
@@ -1027,11 +1024,8 @@ static int sdhci_pci_suspend(struct device *dev)
 
 	if (chip->fixes && chip->fixes->suspend) {
 		ret = chip->fixes->suspend(chip);
-		if (ret) {
-			for (i = chip->num_slots - 1; i >= 0; i--)
-				sdhci_resume_host(chip->slots[i]->host);
-			return ret;
-		}
+		if (ret)
+			goto err_pci_suspend;
 	}
 
 	pci_save_state(pdev);
@@ -1048,6 +1042,11 @@ static int sdhci_pci_suspend(struct device *dev)
 	}
 
 	return 0;
+
+err_pci_suspend:
+	while (--i >= 0)
+		sdhci_resume_host(chip->slots[i]->host);
+	return ret;
 }
 
 static int sdhci_pci_resume(struct device *dev)
@@ -1113,23 +1112,22 @@ static int sdhci_pci_runtime_suspend(struct device *dev)
 
 		ret = sdhci_runtime_suspend_host(slot->host);
 
-		if (ret) {
-			for (i--; i >= 0; i--)
-				sdhci_runtime_resume_host(chip->slots[i]->host);
-			return ret;
-		}
+		if (ret)
+			goto err_pci_runtime_suspend;
 	}
 
 	if (chip->fixes && chip->fixes->suspend) {
 		ret = chip->fixes->suspend(chip);
-		if (ret) {
-			for (i = chip->num_slots - 1; i >= 0; i--)
-				sdhci_runtime_resume_host(chip->slots[i]->host);
-			return ret;
-		}
+		if (ret)
+			goto err_pci_runtime_suspend;
 	}
 
 	return 0;
+
+err_pci_runtime_suspend:
+	while (--i >= 0)
+		sdhci_runtime_resume_host(chip->slots[i]->host);
+	return ret;
 }
 
 static int sdhci_pci_runtime_resume(struct device *dev)
-- 
cgit v1.2.3


From 4137e50494cb3496fbb6ccd27aa7b6d7c9634c1e Mon Sep 17 00:00:00 2001
From: Stephen Boyd <sboyd@codeaurora.org>
Date: Mon, 5 Dec 2011 10:28:44 -0800
Subject: mmc: core: Fixup delayed work clock gating patch

c31b50e (mmc: core: Use delayed work in clock gating framework,
2011-11-14) missed a few things during review:

 o A useless pr_info()

 o milliseconds was written as two words

 o The sysfs file had units in its output

Fix all three problems.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 Documentation/mmc/mmc-dev-attrs.txt | 2 +-
 drivers/mmc/core/host.c             | 6 +-----
 2 files changed, 2 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
index b0245565875a..22ae8441489f 100644
--- a/Documentation/mmc/mmc-dev-attrs.txt
+++ b/Documentation/mmc/mmc-dev-attrs.txt
@@ -71,6 +71,6 @@ SD/MMC/SDIO Clock Gating Attribute
 Read and write access is provided to following attribute.
 This attribute appears only if CONFIG_MMC_CLKGATE is enabled.
 
-	clkgate_delay	Tune the clock gating delay with desired value in milli seconds.
+	clkgate_delay	Tune the clock gating delay with desired value in milliseconds.
 
 echo <desired delay> > /sys/class/mmc_host/mmcX/clkgate_delay
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 817a76039743..30055f2b0d44 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -58,8 +58,7 @@ static ssize_t clkgate_delay_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
 	struct mmc_host *host = cls_dev_to_mmc_host(dev);
-	return snprintf(buf, PAGE_SIZE, "%lu millisecs\n",
-			host->clkgate_delay);
+	return snprintf(buf, PAGE_SIZE, "%lu\n", host->clkgate_delay);
 }
 
 static ssize_t clkgate_delay_store(struct device *dev,
@@ -74,9 +73,6 @@ static ssize_t clkgate_delay_store(struct device *dev,
 	spin_lock_irqsave(&host->clk_lock, flags);
 	host->clkgate_delay = value;
 	spin_unlock_irqrestore(&host->clk_lock, flags);
-
-	pr_info("%s: clock gate delay set to %lu ms\n",
-			mmc_hostname(host), value);
 	return count;
 }
 
-- 
cgit v1.2.3


From a8ad82cc1b22d04916d9cdb1dc75052e80ac803c Mon Sep 17 00:00:00 2001
From: Sujit Reddy Thumma <sthumma@codeaurora.org>
Date: Thu, 8 Dec 2011 14:05:50 +0530
Subject: mmc: card: Kill block requests if card is removed

Kill block requests when the host realizes that the card is
removed from the slot and is sure that subsequent requests
are bound to fail. Do this silently so that the block
layer doesn't output unnecessary error messages.

Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/card/block.c | 17 ++++++++++++++++-
 drivers/mmc/card/queue.c |  5 +++++
 2 files changed, 21 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 0c959c96005e..0cad48a284a8 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -121,6 +121,7 @@ enum mmc_blk_status {
 	MMC_BLK_ABORT,
 	MMC_BLK_DATA_ERR,
 	MMC_BLK_ECC_ERR,
+	MMC_BLK_NOMEDIUM,
 };
 
 module_param(perdev_minors, int, 0444);
@@ -639,6 +640,7 @@ static int get_card_status(struct mmc_card *card, u32 *status, int retries)
 	return err;
 }
 
+#define ERR_NOMEDIUM	3
 #define ERR_RETRY	2
 #define ERR_ABORT	1
 #define ERR_CONTINUE	0
@@ -706,6 +708,9 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
 	u32 status, stop_status = 0;
 	int err, retry;
 
+	if (mmc_card_removed(card))
+		return ERR_NOMEDIUM;
+
 	/*
 	 * Try to get card status which indicates both the card state
 	 * and why there was no response.  If the first attempt fails,
@@ -722,8 +727,12 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
 	}
 
 	/* We couldn't get a response from the card.  Give up. */
-	if (err)
+	if (err) {
+		/* Check if the card is removed */
+		if (mmc_detect_card_removed(card->host))
+			return ERR_NOMEDIUM;
 		return ERR_ABORT;
+	}
 
 	/* Flag ECC errors */
 	if ((status & R1_CARD_ECC_FAILED) ||
@@ -996,6 +1005,8 @@ static int mmc_blk_err_check(struct mmc_card *card,
 			return MMC_BLK_RETRY;
 		case ERR_ABORT:
 			return MMC_BLK_ABORT;
+		case ERR_NOMEDIUM:
+			return MMC_BLK_NOMEDIUM;
 		case ERR_CONTINUE:
 			break;
 		}
@@ -1329,6 +1340,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
 			if (!ret)
 				goto start_new_req;
 			break;
+		case MMC_BLK_NOMEDIUM:
+			goto cmd_abort;
 		}
 
 		if (ret) {
@@ -1345,6 +1358,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
 
  cmd_abort:
 	spin_lock_irq(&md->lock);
+	if (mmc_card_removed(card))
+		req->cmd_flags |= REQ_QUIET;
 	while (ret)
 		ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req));
 	spin_unlock_irq(&md->lock);
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index dcad59cbfef1..2517547b4366 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -29,6 +29,8 @@
  */
 static int mmc_prep_request(struct request_queue *q, struct request *req)
 {
+	struct mmc_queue *mq = q->queuedata;
+
 	/*
 	 * We only like normal block requests and discards.
 	 */
@@ -37,6 +39,9 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
 		return BLKPREP_KILL;
 	}
 
+	if (mq && mmc_card_removed(mq->card))
+		return BLKPREP_KILL;
+
 	req->cmd_flags |= REQ_DONTPREP;
 
 	return BLKPREP_OK;
-- 
cgit v1.2.3


From 6fe8890d0200ea0c2b7d83936d58f97d7ba7c1ff Mon Sep 17 00:00:00 2001
From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Thu, 8 Dec 2011 19:23:03 +0900
Subject: mmc: dw_mmc: use dev_pm_ops for dw_mmc controllers

This patch modifies dw_mmc to use dev_pm_ops.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/dw_mmc.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 3aaeb0841914..44bc11e8761e 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2062,14 +2062,14 @@ static int __exit dw_mci_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 /*
  * TODO: we should probably disable the clock to the card in the suspend path.
  */
-static int dw_mci_suspend(struct platform_device *pdev, pm_message_t mesg)
+static int dw_mci_suspend(struct device *dev)
 {
 	int i, ret;
-	struct dw_mci *host = platform_get_drvdata(pdev);
+	struct dw_mci *host = dev_get_drvdata(dev);
 
 	for (i = 0; i < host->num_slots; i++) {
 		struct dw_mci_slot *slot = host->slot[i];
@@ -2092,10 +2092,10 @@ static int dw_mci_suspend(struct platform_device *pdev, pm_message_t mesg)
 	return 0;
 }
 
-static int dw_mci_resume(struct platform_device *pdev)
+static int dw_mci_resume(struct device *dev)
 {
 	int i, ret;
-	struct dw_mci *host = platform_get_drvdata(pdev);
+	struct dw_mci *host = dev_get_drvdata(dev);
 
 	if (host->vmmc)
 		regulator_enable(host->vmmc);
@@ -2103,7 +2103,7 @@ static int dw_mci_resume(struct platform_device *pdev)
 	if (host->dma_ops->init)
 		host->dma_ops->init(host);
 
-	if (!mci_wait_reset(&pdev->dev, host)) {
+	if (!mci_wait_reset(dev, host)) {
 		ret = -ENODEV;
 		return ret;
 	}
@@ -2131,14 +2131,15 @@ static int dw_mci_resume(struct platform_device *pdev)
 #else
 #define dw_mci_suspend	NULL
 #define dw_mci_resume	NULL
-#endif /* CONFIG_PM */
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(dw_mci_pmops, dw_mci_suspend, dw_mci_resume);
 
 static struct platform_driver dw_mci_driver = {
 	.remove		= __exit_p(dw_mci_remove),
-	.suspend	= dw_mci_suspend,
-	.resume		= dw_mci_resume,
 	.driver		= {
 		.name		= "dw_mmc",
+		.pm		= &dw_mci_pmops,
 	},
 };
 
-- 
cgit v1.2.3


From 4f408cc67a0613f969d1e02fff6de74d31a29fb3 Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Fri, 9 Dec 2011 14:55:52 +0900
Subject: mmc: dw_mmc: Add more capabilities field

This patch adds another capabilities field for MMC_CAPS2_XXX.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/dw_mmc.c  | 6 ++++++
 include/linux/mmc/dw_mmc.h | 1 +
 2 files changed, 7 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 44bc11e8761e..69e588960e79 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1681,6 +1681,12 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	else
 		mmc->caps = 0;
 
+	if (host->pdata->caps2)
+		mmc->caps2 = host->pdata->caps2;
+	else
+		mmc->caps2 = 0;
+
+
 	if (host->pdata->get_bus_wd)
 		if (host->pdata->get_bus_wd(slot->id) >= 4)
 			mmc->caps |= MMC_CAP_4_BIT_DATA;
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index 6dc9b80568a0..e8779c6d1759 100644
--- a/include/linux/mmc/dw_mmc.h
+++ b/include/linux/mmc/dw_mmc.h
@@ -214,6 +214,7 @@ struct dw_mci_board {
 	unsigned int bus_hz; /* Bus speed */
 
 	unsigned int caps;	/* Capabilities */
+	unsigned int caps2;	/* More capabilities */
 	/*
 	 * Override fifo depth. If 0, autodetect it from the FIFOTH register,
 	 * but note that this may not be reliable after a bootloader has used
-- 
cgit v1.2.3


From 5b93a4595b6c39f78b69cc6eb9a3fa0ae6efe4a6 Mon Sep 17 00:00:00 2001
From: Chris Ball <cjb@laptop.org>
Date: Sat, 24 Dec 2011 21:06:06 -0500
Subject: mmc: dw_mmc: Remove unnecessary else clauses

Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/dw_mmc.c | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 69e588960e79..9b839fabfb3c 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1678,14 +1678,9 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 
 	if (host->pdata->caps)
 		mmc->caps = host->pdata->caps;
-	else
-		mmc->caps = 0;
 
 	if (host->pdata->caps2)
 		mmc->caps2 = host->pdata->caps2;
-	else
-		mmc->caps2 = 0;
-
 
 	if (host->pdata->get_bus_wd)
 		if (host->pdata->get_bus_wd(slot->id) >= 4)
-- 
cgit v1.2.3


From 053b3ce6c15f0199c20b3fb06c3ae479de0324e2 Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Thu, 22 Dec 2011 18:01:29 +0900
Subject: mmc: dw_mmc: Support predefined mutiple block transfers

This patch adds the support for predefined multiple block r/w.
dw_mmc can support MMC_CAP_CMD23 capability.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/dw_mmc.c | 34 ++++++++++++++++++++++++++++------
 1 file changed, 28 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 9b839fabfb3c..c583b943f615 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -588,11 +588,11 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot)
 	mci_writel(host, CTYPE, (slot->ctype << slot->id));
 }
 
-static void dw_mci_start_request(struct dw_mci *host,
-				 struct dw_mci_slot *slot)
+static void __dw_mci_start_request(struct dw_mci *host,
+				   struct dw_mci_slot *slot,
+				   struct mmc_command *cmd)
 {
 	struct mmc_request *mrq;
-	struct mmc_command *cmd;
 	struct mmc_data	*data;
 	u32 cmdflags;
 
@@ -610,14 +610,13 @@ static void dw_mci_start_request(struct dw_mci *host,
 	host->completed_events = 0;
 	host->data_status = 0;
 
-	data = mrq->data;
+	data = cmd->data;
 	if (data) {
 		dw_mci_set_timeout(host);
 		mci_writel(host, BYTCNT, data->blksz*data->blocks);
 		mci_writel(host, BLKSIZ, data->blksz);
 	}
 
-	cmd = mrq->cmd;
 	cmdflags = dw_mci_prepare_command(slot->mmc, cmd);
 
 	/* this is the first command, send the initialization clock */
@@ -635,6 +634,16 @@ static void dw_mci_start_request(struct dw_mci *host,
 		host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop);
 }
 
+static void dw_mci_start_request(struct dw_mci *host,
+				 struct dw_mci_slot *slot)
+{
+	struct mmc_request *mrq = slot->mrq;
+	struct mmc_command *cmd;
+
+	cmd = mrq->sbc ? mrq->sbc : mrq->cmd;
+	__dw_mci_start_request(host, slot, cmd);
+}
+
 /* must be called with host->lock held */
 static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot,
 				 struct mmc_request *mrq)
@@ -889,7 +898,14 @@ static void dw_mci_tasklet_func(unsigned long priv)
 			cmd = host->cmd;
 			host->cmd = NULL;
 			set_bit(EVENT_CMD_COMPLETE, &host->completed_events);
-			dw_mci_command_complete(host, host->mrq->cmd);
+			dw_mci_command_complete(host, cmd);
+			if (cmd == host->mrq->sbc && !cmd->error) {
+				prev_state = state = STATE_SENDING_CMD;
+				__dw_mci_start_request(host, host->cur_slot,
+						       host->mrq->cmd);
+				goto unlock;
+			}
+
 			if (!host->mrq->data || cmd->error) {
 				dw_mci_request_end(host, host->mrq);
 				goto unlock;
@@ -967,6 +983,12 @@ static void dw_mci_tasklet_func(unsigned long priv)
 				goto unlock;
 			}
 
+			if (host->mrq->sbc && !data->error) {
+				data->stop->error = 0;
+				dw_mci_request_end(host, host->mrq);
+				goto unlock;
+			}
+
 			prev_state = state = STATE_SENDING_STOP;
 			if (!data->error)
 				send_stop_cmd(host, data);
-- 
cgit v1.2.3


From 7003fecbf0c9f7dde75d93ba75e0cb7ddb662749 Mon Sep 17 00:00:00 2001
From: Jingoo Han <jg1.han@samsung.com>
Date: Wed, 14 Dec 2011 13:25:46 +0900
Subject: mmc: sdhci-s3c: use S3C_SDHCI_CONTROL2 instead of hardcoded offset
 value

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-s3c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index b6558b829a9c..d065e3749e56 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -80,7 +80,7 @@ static void sdhci_s3c_check_sclk(struct sdhci_host *host)
 
 		tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
 		tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT;
-		writel(tmp, host->ioaddr + 0x80);
+		writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2);
 	}
 }
 
-- 
cgit v1.2.3


From 913047e9e5787a90696533a9f109552b7694ecc9 Mon Sep 17 00:00:00 2001
From: Girish K S <girish.shivananjappa@linaro.org>
Date: Thu, 15 Dec 2011 17:27:42 +0530
Subject: mmc: core: Fix voltage select in DDR mode

This patch fixes the wrong comparison before setting the interface
voltage in DDR mode.

The assignment to the variable ddr before comaprison is either
ddr = MMC_1_2V_DDR_MODE; or ddr == MMC_1_8V_DDR_MODE. But the comparison
is done with the extended csd value if ddr == EXT_CSD_CARD_TYPE_DDR_1_2V.

Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Acked-by: Subhash Jadavani <subhashj@codeaurora.org>
Acked-by: Philip Rakity <prakity@marvell.com>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/mmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 006e932a3ae3..f0a9f1fbd1f6 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1058,7 +1058,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 			 *
 			 * WARNING: eMMC rules are NOT the same as SD DDR
 			 */
-			if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
+			if (ddr == MMC_1_2V_DDR_MODE) {
 				err = mmc_set_signal_voltage(host,
 					MMC_SIGNAL_VOLTAGE_120, 0);
 				if (err)
-- 
cgit v1.2.3


From cbb18b309d3d6b6661f931279697eac77b6591c9 Mon Sep 17 00:00:00 2001
From: Bastian Hecht <hechtb@googlemail.com>
Date: Fri, 23 Dec 2011 23:03:13 +0100
Subject: mmc: tmio_mmc: Hotplug code regrouping

This patch regroups the code slightly, adds documentation and allows
the rtpm counter of MMC_CAP_NEEDS_POLL devices to reach 0 again.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
[g.liakhovetski@gmx.de: restore pm_runtime_get_noresume()]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/tmio_mmc_pio.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 4208b3958069..abad01b37cfb 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -800,8 +800,7 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	} else if (ios->power_mode != MMC_POWER_UP) {
 		if (host->set_pwr && ios->power_mode == MMC_POWER_OFF)
 			host->set_pwr(host->pdev, 0);
-		if ((pdata->flags & TMIO_MMC_HAS_COLD_CD) &&
-		    pdata->power) {
+		if (pdata->power) {
 			pdata->power = false;
 			pm_runtime_put(&host->pdev->dev);
 		}
@@ -915,6 +914,23 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
 	if (ret < 0)
 		goto pm_disable;
 
+	/*
+	 * There are 4 different scenarios for the card detection:
+	 *  1) an external gpio irq handles the cd (best for power savings)
+	 *  2) internal sdhi irq handles the cd
+	 *  3) a worker thread polls the sdhi - indicated by MMC_CAP_NEEDS_POLL
+	 *  4) the medium is non-removable - indicated by MMC_CAP_NONREMOVABLE
+	 *
+	 *  While we increment the rtpm counter for all scenarios when the mmc
+	 *  core activates us by calling an appropriate set_ios(), we must
+	 *  additionally ensure that in case 2) the tmio mmc hardware stays
+	 *  powered on during runtime for the card detection to work.
+	 */
+	if (!(pdata->flags & TMIO_MMC_HAS_COLD_CD
+		|| mmc->caps & MMC_CAP_NEEDS_POLL
+		|| mmc->caps & MMC_CAP_NONREMOVABLE))
+		pm_runtime_get_noresume(&pdev->dev);
+
 	tmio_mmc_clk_stop(_host);
 	tmio_mmc_reset(_host);
 
@@ -933,12 +949,6 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
 	/* See if we also get DMA */
 	tmio_mmc_request_dma(_host, pdata);
 
-	/* We have to keep the device powered for its card detection to work */
-	if (!(pdata->flags & TMIO_MMC_HAS_COLD_CD)) {
-		pdata->power = true;
-		pm_runtime_get_noresume(&pdev->dev);
-	}
-
 	mmc_add_host(mmc);
 
 	/* Unmask the IRQs we want to know about */
@@ -974,7 +984,9 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
 	 * the controller, the runtime PM is suspended and pdata->power == false,
 	 * so, our .runtime_resume() will not try to detect a card in the slot.
 	 */
-	if (host->pdata->flags & TMIO_MMC_HAS_COLD_CD)
+	if (host->pdata->flags & TMIO_MMC_HAS_COLD_CD
+		|| host->mmc->caps & MMC_CAP_NEEDS_POLL
+		|| host->mmc->caps & MMC_CAP_NONREMOVABLE)
 		pm_runtime_get_sync(&pdev->dev);
 
 	mmc_remove_host(host->mmc);
-- 
cgit v1.2.3


From 349ab52446772a359bc7e7699cae3880d48fa5c9 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Sun, 25 Dec 2011 21:36:02 +0100
Subject: mmc: add a generic GPIO card-detect helper

This patch adds a primitive helper to support card hotplug detection on
platforms, where a GPIO, capable of producing interrupts, is used for
detection of card-insertion and -removal events.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/Makefile   |  2 +-
 drivers/mmc/core/cd-gpio.c  | 74 +++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mmc/cd-gpio.h | 19 ++++++++++++
 3 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mmc/core/cd-gpio.c
 create mode 100644 include/linux/mmc/cd-gpio.h

(limited to 'drivers')

diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index 639501970b41..dca4428380f1 100644
--- a/drivers/mmc/core/Makefile
+++ b/drivers/mmc/core/Makefile
@@ -7,6 +7,6 @@ mmc_core-y			:= core.o bus.o host.o \
 				   mmc.o mmc_ops.o sd.o sd_ops.o \
 				   sdio.o sdio_ops.o sdio_bus.o \
 				   sdio_cis.o sdio_io.o sdio_irq.o \
-				   quirks.o
+				   quirks.o cd-gpio.o
 
 mmc_core-$(CONFIG_DEBUG_FS)	+= debugfs.o
diff --git a/drivers/mmc/core/cd-gpio.c b/drivers/mmc/core/cd-gpio.c
new file mode 100644
index 000000000000..082202ae4a03
--- /dev/null
+++ b/drivers/mmc/core/cd-gpio.c
@@ -0,0 +1,74 @@
+/*
+ * Generic GPIO card-detect helper
+ *
+ * Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/mmc/host.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+struct mmc_cd_gpio {
+	unsigned int gpio;
+	char label[0];
+};
+
+static irqreturn_t mmc_cd_gpio_irqt(int irq, void *dev_id)
+{
+	/* Schedule a card detection after a debounce timeout */
+	mmc_detect_change(dev_id, msecs_to_jiffies(100));
+	return IRQ_HANDLED;
+}
+
+int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio,
+			unsigned int irq, unsigned long flags)
+{
+	size_t len = strlen(dev_name(host->parent)) + 4;
+	struct mmc_cd_gpio *cd = kmalloc(sizeof(*cd) + len, GFP_KERNEL);
+	int ret;
+
+	if (!cd)
+		return -ENOMEM;
+
+	snprintf(cd->label, len, "%s cd", dev_name(host->parent));
+
+	ret = gpio_request_one(gpio, GPIOF_DIR_IN, cd->label);
+	if (ret < 0)
+		goto egpioreq;
+
+	ret = request_threaded_irq(irq, NULL, mmc_cd_gpio_irqt,
+				   flags, cd->label, host);
+	if (ret < 0)
+		goto eirqreq;
+
+	cd->gpio = gpio;
+	host->hotplug.irq = irq;
+	host->hotplug.handler_priv = cd;
+
+	return 0;
+
+eirqreq:
+	gpio_free(gpio);
+egpioreq:
+	kfree(cd);
+	return ret;
+}
+EXPORT_SYMBOL(mmc_cd_gpio_request);
+
+void mmc_cd_gpio_free(struct mmc_host *host)
+{
+	struct mmc_cd_gpio *cd = host->hotplug.handler_priv;
+
+	free_irq(host->hotplug.irq, host);
+	gpio_free(cd->gpio);
+	kfree(cd);
+}
+EXPORT_SYMBOL(mmc_cd_gpio_free);
diff --git a/include/linux/mmc/cd-gpio.h b/include/linux/mmc/cd-gpio.h
new file mode 100644
index 000000000000..a8e469783318
--- /dev/null
+++ b/include/linux/mmc/cd-gpio.h
@@ -0,0 +1,19 @@
+/*
+ * Generic GPIO card-detect helper header
+ *
+ * Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef MMC_CD_GPIO_H
+#define MMC_CD_GPIO_H
+
+struct mmc_host;
+int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio,
+			unsigned int irq, unsigned long flags);
+void mmc_cd_gpio_free(struct mmc_host *host);
+
+#endif
-- 
cgit v1.2.3


From 8a8284a98c1a58f5aa3eebce7971f81bcdb29d98 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Wed, 14 Dec 2011 19:31:51 +0100
Subject: mmc: sh_mmcif: process error interrupts first

If an interrupt is coming with both error and data completion status bits
set, it has to be handled as an error interrupt, for which error interrupts
have to be processed first. The current version of the driver on the
contrary doesn't recognise such interrupts as an error event, which leads
to data corruption and breaks the error recovery.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sh_mmcif.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 7bec007bcefa..0cba85a7f561 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -961,7 +961,12 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 
 	state = sh_mmcif_readl(host->addr, MMCIF_CE_INT);
 
-	if (state & INT_RBSYE) {
+	if (state & INT_ERR_STS) {
+		/* error interrupts - process first */
+		sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
+		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
+		err = 1;
+	} else if (state & INT_RBSYE) {
 		sh_mmcif_writel(host->addr, MMCIF_CE_INT,
 				~(INT_RBSYE | INT_CRSPE));
 		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE);
@@ -989,11 +994,6 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 		sh_mmcif_writel(host->addr, MMCIF_CE_INT,
 				~(INT_CMD12RBE | INT_CMD12CRE));
 		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
-	} else if (state & INT_ERR_STS) {
-		/* err interrupts */
-		sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
-		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
-		err = 1;
 	} else {
 		dev_dbg(&host->pd->dev, "Unsupported interrupt: 0x%x\n", state);
 		sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
-- 
cgit v1.2.3


From ee4b88879f23badd54f5557852745fa28a1570f6 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Wed, 14 Dec 2011 19:31:52 +0100
Subject: mmc: sh_mmcif: cosmetic clean up

This patch doesn't introduce any functional changes, it only simplifies
some code fragments, removes superfluous parameters, fixes typos.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sh_mmcif.c | 79 +++++++++++++++++++--------------------------
 1 file changed, 34 insertions(+), 45 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 0cba85a7f561..8aee127e60b8 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -124,6 +124,11 @@
 #define MASK_MRBSYTO		(1 << 1)
 #define MASK_MRSPTO		(1 << 0)
 
+#define MASK_START_CMD		(MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR | \
+				 MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR | \
+				 MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO | \
+				 MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO)
+
 /* CE_HOST_STS1 */
 #define STS1_CMDSEQ		(1 << 31)
 
@@ -176,8 +181,8 @@ struct sh_mmcif_host {
 	long timeout;
 	void __iomem *addr;
 	struct completion intr_wait;
+	spinlock_t lock;		/* protect sh_mmcif_host::state */
 	enum mmcif_state state;
-	spinlock_t lock;
 	bool power;
 	bool card_present;
 
@@ -422,7 +427,7 @@ static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
 static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
 {
 	u32 state1, state2;
-	int ret, timeout = 10000000;
+	int ret, timeout;
 
 	host->sd_error = false;
 
@@ -434,31 +439,30 @@ static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
 	if (state1 & STS1_CMDSEQ) {
 		sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK);
 		sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK);
-		while (1) {
-			timeout--;
-			if (timeout < 0) {
-				dev_err(&host->pd->dev,
-					"Forceed end of command sequence timeout err\n");
-				return -EIO;
-			}
+		for (timeout = 10000000; timeout; timeout--) {
 			if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1)
-								& STS1_CMDSEQ))
+			      & STS1_CMDSEQ))
 				break;
 			mdelay(1);
 		}
+		if (!timeout) {
+			dev_err(&host->pd->dev,
+				"Forced end of command sequence timeout err\n");
+			return -EIO;
+		}
 		sh_mmcif_sync_reset(host);
 		dev_dbg(&host->pd->dev, "Forced end of command sequence\n");
 		return -EIO;
 	}
 
 	if (state2 & STS2_CRC_ERR) {
-		dev_dbg(&host->pd->dev, ": Happened CRC error\n");
+		dev_dbg(&host->pd->dev, ": CRC error\n");
 		ret = -EIO;
 	} else if (state2 & STS2_TIMEOUT_ERR) {
-		dev_dbg(&host->pd->dev, ": Happened Timeout error\n");
+		dev_dbg(&host->pd->dev, ": Timeout\n");
 		ret = -ETIMEDOUT;
 	} else {
-		dev_dbg(&host->pd->dev, ": Happened End/Index error\n");
+		dev_dbg(&host->pd->dev, ": End/Index error\n");
 		ret = -EIO;
 	}
 	return ret;
@@ -681,55 +685,44 @@ static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
 static int sh_mmcif_data_trans(struct sh_mmcif_host *host,
 				struct mmc_request *mrq, u32 opc)
 {
-	int ret;
-
 	switch (opc) {
 	case MMC_READ_MULTIPLE_BLOCK:
-		ret = sh_mmcif_multi_read(host, mrq);
-		break;
+		return sh_mmcif_multi_read(host, mrq);
 	case MMC_WRITE_MULTIPLE_BLOCK:
-		ret = sh_mmcif_multi_write(host, mrq);
-		break;
+		return sh_mmcif_multi_write(host, mrq);
 	case MMC_WRITE_BLOCK:
-		ret = sh_mmcif_single_write(host, mrq);
-		break;
+		return sh_mmcif_single_write(host, mrq);
 	case MMC_READ_SINGLE_BLOCK:
 	case MMC_SEND_EXT_CSD:
-		ret = sh_mmcif_single_read(host, mrq);
-		break;
+		return sh_mmcif_single_read(host, mrq);
 	default:
 		dev_err(&host->pd->dev, "UNSUPPORTED CMD = d'%08d\n", opc);
-		ret = -EINVAL;
-		break;
+		return -EINVAL;
 	}
-	return ret;
 }
 
 static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
-			struct mmc_request *mrq, struct mmc_command *cmd)
+			       struct mmc_request *mrq)
 {
+	struct mmc_command *cmd = mrq->cmd;
 	long time;
-	int ret = 0, mask = 0;
-	u32 opc = cmd->opcode;
+	int ret = 0;
+	u32 mask, opc = cmd->opcode;
 
 	switch (opc) {
-	/* respons busy check */
+	/* response busy check */
 	case MMC_SWITCH:
 	case MMC_STOP_TRANSMISSION:
 	case MMC_SET_WRITE_PROT:
 	case MMC_CLR_WRITE_PROT:
 	case MMC_ERASE:
 	case MMC_GEN_CMD:
-		mask = MASK_MRBSYE;
+		mask = MASK_START_CMD | MASK_MRBSYE;
 		break;
 	default:
-		mask = MASK_MCRSPE;
+		mask = MASK_START_CMD | MASK_MCRSPE;
 		break;
 	}
-	mask |=	MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
-		MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
-		MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
-		MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
 
 	if (host->data) {
 		sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0);
@@ -797,8 +790,9 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
 }
 
 static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
-		struct mmc_request *mrq, struct mmc_command *cmd)
+			      struct mmc_request *mrq)
 {
+	struct mmc_command *cmd = mrq->stop;
 	long time;
 
 	if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
@@ -867,11 +861,11 @@ static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
 				sh_mmcif_start_dma_tx(host);
 		}
 	}
-	sh_mmcif_start_cmd(host, mrq, mrq->cmd);
+	sh_mmcif_start_cmd(host, mrq);
 	host->data = NULL;
 
 	if (!mrq->cmd->error && mrq->stop)
-		sh_mmcif_stop_cmd(host, mrq, mrq->stop);
+		sh_mmcif_stop_cmd(host, mrq);
 	host->state = STATE_IDLE;
 	mmc_request_done(mmc, mrq);
 }
@@ -948,11 +942,6 @@ static struct mmc_host_ops sh_mmcif_ops = {
 	.get_cd		= sh_mmcif_get_cd,
 };
 
-static void sh_mmcif_detect(struct mmc_host *mmc)
-{
-	mmc_detect_change(mmc, 0);
-}
-
 static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 {
 	struct sh_mmcif_host *host = dev_id;
@@ -1114,7 +1103,7 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
 		goto clean_up3;
 	}
 
-	sh_mmcif_detect(host->mmc);
+	mmc_detect_change(host->mmc, 0);
 
 	dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION);
 	dev_dbg(&pdev->dev, "chip ver H'%04x\n",
-- 
cgit v1.2.3


From f985da17f4d368896fb30d94531e4ffaa18e68d8 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Sun, 25 Dec 2011 21:07:52 +0100
Subject: mmc: sh_mmcif: process requests asynchronously

This patch converts the sh_mmcif MMC host driver to process requests
asynchronously instead of waiting in its .request() method for completion.
This is achieved by using threaded IRQs.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sh_mmcif.c | 588 +++++++++++++++++++++++++++++++-------------
 1 file changed, 416 insertions(+), 172 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 8aee127e60b8..9371f3a4939b 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -16,6 +16,32 @@
  *
  */
 
+/*
+ * The MMCIF driver is now processing MMC requests asynchronously, according
+ * to the Linux MMC API requirement.
+ *
+ * The MMCIF driver processes MMC requests in up to 3 stages: command, optional
+ * data, and optional stop. To achieve asynchronous processing each of these
+ * stages is split into two halves: a top and a bottom half. The top half
+ * initialises the hardware, installs a timeout handler to handle completion
+ * timeouts, and returns. In case of the command stage this immediately returns
+ * control to the caller, leaving all further processing to run asynchronously.
+ * All further request processing is performed by the bottom halves.
+ *
+ * The bottom half further consists of a "hard" IRQ handler, an IRQ handler
+ * thread, a DMA completion callback, if DMA is used, a timeout work, and
+ * request- and stage-specific handler methods.
+ *
+ * Each bottom half run begins with either a hardware interrupt, a DMA callback
+ * invocation, or a timeout work run. In case of an error or a successful
+ * processing completion, the MMC core is informed and the request processing is
+ * finished. In case processing has to continue, i.e., if data has to be read
+ * from or written to the card, or if a stop command has to be sent, the next
+ * top half is called, which performs the necessary hardware handling and
+ * reschedules the timeout work. This returns the driver state machine into the
+ * bottom half waiting state.
+ */
+
 #include <linux/bitops.h>
 #include <linux/clk.h>
 #include <linux/completion.h>
@@ -168,9 +194,22 @@ enum mmcif_state {
 	STATE_IOS,
 };
 
+enum mmcif_wait_for {
+	MMCIF_WAIT_FOR_REQUEST,
+	MMCIF_WAIT_FOR_CMD,
+	MMCIF_WAIT_FOR_MREAD,
+	MMCIF_WAIT_FOR_MWRITE,
+	MMCIF_WAIT_FOR_READ,
+	MMCIF_WAIT_FOR_WRITE,
+	MMCIF_WAIT_FOR_READ_END,
+	MMCIF_WAIT_FOR_WRITE_END,
+	MMCIF_WAIT_FOR_STOP,
+};
+
 struct sh_mmcif_host {
 	struct mmc_host *mmc;
 	struct mmc_data *data;
+	struct mmc_request *mrq;
 	struct platform_device *pd;
 	struct sh_dmae_slave dma_slave_tx;
 	struct sh_dmae_slave dma_slave_rx;
@@ -178,11 +217,17 @@ struct sh_mmcif_host {
 	unsigned int clk;
 	int bus_width;
 	bool sd_error;
+	bool dying;
 	long timeout;
 	void __iomem *addr;
-	struct completion intr_wait;
+	u32 *pio_ptr;
 	spinlock_t lock;		/* protect sh_mmcif_host::state */
 	enum mmcif_state state;
+	enum mmcif_wait_for wait_for;
+	struct delayed_work timeout_work;
+	size_t blocksize;
+	int sg_idx;
+	int sg_blkidx;
 	bool power;
 	bool card_present;
 
@@ -468,125 +513,183 @@ static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
 	return ret;
 }
 
-static int sh_mmcif_single_read(struct sh_mmcif_host *host,
-					struct mmc_request *mrq)
+static bool sh_mmcif_next_block(struct sh_mmcif_host *host, u32 *p)
 {
-	struct mmc_data *data = mrq->data;
-	long time;
-	u32 blocksize, i, *p = sg_virt(data->sg);
+	struct mmc_data *data = host->mrq->data;
+
+	host->sg_blkidx += host->blocksize;
+
+	/* data->sg->length must be a multiple of host->blocksize? */
+	BUG_ON(host->sg_blkidx > data->sg->length);
+
+	if (host->sg_blkidx == data->sg->length) {
+		host->sg_blkidx = 0;
+		if (++host->sg_idx < data->sg_len)
+			host->pio_ptr = sg_virt(++data->sg);
+	} else {
+		host->pio_ptr = p;
+	}
+
+	if (host->sg_idx == data->sg_len)
+		return false;
+
+	return true;
+}
+
+static void sh_mmcif_single_read(struct sh_mmcif_host *host,
+				 struct mmc_request *mrq)
+{
+	host->blocksize = (sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
+			   BLOCK_SIZE_MASK) + 3;
+
+	host->wait_for = MMCIF_WAIT_FOR_READ;
+	schedule_delayed_work(&host->timeout_work, host->timeout);
 
 	/* buf read enable */
 	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
-	time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-			host->timeout);
-	if (time <= 0 || host->sd_error)
-		return sh_mmcif_error_manage(host);
-
-	blocksize = (BLOCK_SIZE_MASK &
-			sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
-	for (i = 0; i < blocksize / 4; i++)
+}
+
+static bool sh_mmcif_read_block(struct sh_mmcif_host *host)
+{
+	struct mmc_data *data = host->mrq->data;
+	u32 *p = sg_virt(data->sg);
+	int i;
+
+	if (host->sd_error) {
+		data->error = sh_mmcif_error_manage(host);
+		return false;
+	}
+
+	for (i = 0; i < host->blocksize / 4; i++)
 		*p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);
 
 	/* buffer read end */
 	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
-	time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-			host->timeout);
-	if (time <= 0 || host->sd_error)
-		return sh_mmcif_error_manage(host);
+	host->wait_for = MMCIF_WAIT_FOR_READ_END;
 
-	return 0;
+	return true;
 }
 
-static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
-					struct mmc_request *mrq)
+static void sh_mmcif_multi_read(struct sh_mmcif_host *host,
+				struct mmc_request *mrq)
 {
 	struct mmc_data *data = mrq->data;
-	long time;
-	u32 blocksize, i, j, sec, *p;
-
-	blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
-						     MMCIF_CE_BLOCK_SET);
-	for (j = 0; j < data->sg_len; j++) {
-		p = sg_virt(data->sg);
-		for (sec = 0; sec < data->sg->length / blocksize; sec++) {
-			sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
-			/* buf read enable */
-			time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-				host->timeout);
-
-			if (time <= 0 || host->sd_error)
-				return sh_mmcif_error_manage(host);
-
-			for (i = 0; i < blocksize / 4; i++)
-				*p++ = sh_mmcif_readl(host->addr,
-						      MMCIF_CE_DATA);
-		}
-		if (j < data->sg_len - 1)
-			data->sg++;
+
+	if (!data->sg_len || !data->sg->length)
+		return;
+
+	host->blocksize = sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
+		BLOCK_SIZE_MASK;
+
+	host->wait_for = MMCIF_WAIT_FOR_MREAD;
+	host->sg_idx = 0;
+	host->sg_blkidx = 0;
+	host->pio_ptr = sg_virt(data->sg);
+	schedule_delayed_work(&host->timeout_work, host->timeout);
+	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
+}
+
+static bool sh_mmcif_mread_block(struct sh_mmcif_host *host)
+{
+	struct mmc_data *data = host->mrq->data;
+	u32 *p = host->pio_ptr;
+	int i;
+
+	if (host->sd_error) {
+		data->error = sh_mmcif_error_manage(host);
+		return false;
 	}
-	return 0;
+
+	BUG_ON(!data->sg->length);
+
+	for (i = 0; i < host->blocksize / 4; i++)
+		*p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);
+
+	if (!sh_mmcif_next_block(host, p))
+		return false;
+
+	schedule_delayed_work(&host->timeout_work, host->timeout);
+	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
+
+	return true;
 }
 
-static int sh_mmcif_single_write(struct sh_mmcif_host *host,
+static void sh_mmcif_single_write(struct sh_mmcif_host *host,
 					struct mmc_request *mrq)
 {
-	struct mmc_data *data = mrq->data;
-	long time;
-	u32 blocksize, i, *p = sg_virt(data->sg);
+	host->blocksize = (sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
+			   BLOCK_SIZE_MASK) + 3;
 
-	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
+	host->wait_for = MMCIF_WAIT_FOR_WRITE;
+	schedule_delayed_work(&host->timeout_work, host->timeout);
 
 	/* buf write enable */
-	time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-			host->timeout);
-	if (time <= 0 || host->sd_error)
-		return sh_mmcif_error_manage(host);
-
-	blocksize = (BLOCK_SIZE_MASK &
-			sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
-	for (i = 0; i < blocksize / 4; i++)
+	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
+}
+
+static bool sh_mmcif_write_block(struct sh_mmcif_host *host)
+{
+	struct mmc_data *data = host->mrq->data;
+	u32 *p = sg_virt(data->sg);
+	int i;
+
+	if (host->sd_error) {
+		data->error = sh_mmcif_error_manage(host);
+		return false;
+	}
+
+	for (i = 0; i < host->blocksize / 4; i++)
 		sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);
 
 	/* buffer write end */
 	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
+	host->wait_for = MMCIF_WAIT_FOR_WRITE_END;
 
-	time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-			host->timeout);
-	if (time <= 0 || host->sd_error)
-		return sh_mmcif_error_manage(host);
-
-	return 0;
+	return true;
 }
 
-static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
-						struct mmc_request *mrq)
+static void sh_mmcif_multi_write(struct sh_mmcif_host *host,
+				struct mmc_request *mrq)
 {
 	struct mmc_data *data = mrq->data;
-	long time;
-	u32 i, sec, j, blocksize, *p;
 
-	blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
-						     MMCIF_CE_BLOCK_SET);
+	if (!data->sg_len || !data->sg->length)
+		return;
 
-	for (j = 0; j < data->sg_len; j++) {
-		p = sg_virt(data->sg);
-		for (sec = 0; sec < data->sg->length / blocksize; sec++) {
-			sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
-			/* buf write enable*/
-			time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-				host->timeout);
+	host->blocksize = sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) &
+		BLOCK_SIZE_MASK;
 
-			if (time <= 0 || host->sd_error)
-				return sh_mmcif_error_manage(host);
+	host->wait_for = MMCIF_WAIT_FOR_MWRITE;
+	host->sg_idx = 0;
+	host->sg_blkidx = 0;
+	host->pio_ptr = sg_virt(data->sg);
+	schedule_delayed_work(&host->timeout_work, host->timeout);
+	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
+}
 
-			for (i = 0; i < blocksize / 4; i++)
-				sh_mmcif_writel(host->addr,
-						MMCIF_CE_DATA, *p++);
-		}
-		if (j < data->sg_len - 1)
-			data->sg++;
+static bool sh_mmcif_mwrite_block(struct sh_mmcif_host *host)
+{
+	struct mmc_data *data = host->mrq->data;
+	u32 *p = host->pio_ptr;
+	int i;
+
+	if (host->sd_error) {
+		data->error = sh_mmcif_error_manage(host);
+		return false;
 	}
-	return 0;
+
+	BUG_ON(!data->sg->length);
+
+	for (i = 0; i < host->blocksize / 4; i++)
+		sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);
+
+	if (!sh_mmcif_next_block(host, p))
+		return false;
+
+	schedule_delayed_work(&host->timeout_work, host->timeout);
+	sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
+
+	return true;
 }
 
 static void sh_mmcif_get_response(struct sh_mmcif_host *host,
@@ -683,18 +786,22 @@ static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
 }
 
 static int sh_mmcif_data_trans(struct sh_mmcif_host *host,
-				struct mmc_request *mrq, u32 opc)
+			       struct mmc_request *mrq, u32 opc)
 {
 	switch (opc) {
 	case MMC_READ_MULTIPLE_BLOCK:
-		return sh_mmcif_multi_read(host, mrq);
+		sh_mmcif_multi_read(host, mrq);
+		return 0;
 	case MMC_WRITE_MULTIPLE_BLOCK:
-		return sh_mmcif_multi_write(host, mrq);
+		sh_mmcif_multi_write(host, mrq);
+		return 0;
 	case MMC_WRITE_BLOCK:
-		return sh_mmcif_single_write(host, mrq);
+		sh_mmcif_single_write(host, mrq);
+		return 0;
 	case MMC_READ_SINGLE_BLOCK:
 	case MMC_SEND_EXT_CSD:
-		return sh_mmcif_single_read(host, mrq);
+		sh_mmcif_single_read(host, mrq);
+		return 0;
 	default:
 		dev_err(&host->pd->dev, "UNSUPPORTED CMD = d'%08d\n", opc);
 		return -EINVAL;
@@ -705,9 +812,8 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
 			       struct mmc_request *mrq)
 {
 	struct mmc_command *cmd = mrq->cmd;
-	long time;
-	int ret = 0;
-	u32 mask, opc = cmd->opcode;
+	u32 opc = cmd->opcode;
+	u32 mask;
 
 	switch (opc) {
 	/* response busy check */
@@ -738,62 +844,14 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
 	/* set cmd */
 	sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc);
 
-	time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-		host->timeout);
-	if (time <= 0) {
-		cmd->error = sh_mmcif_error_manage(host);
-		return;
-	}
-	if (host->sd_error) {
-		switch (cmd->opcode) {
-		case MMC_ALL_SEND_CID:
-		case MMC_SELECT_CARD:
-		case MMC_APP_CMD:
-			cmd->error = -ETIMEDOUT;
-			break;
-		default:
-			dev_dbg(&host->pd->dev, "Cmd(d'%d) err\n",
-					cmd->opcode);
-			cmd->error = sh_mmcif_error_manage(host);
-			break;
-		}
-		host->sd_error = false;
-		return;
-	}
-	if (!(cmd->flags & MMC_RSP_PRESENT)) {
-		cmd->error = 0;
-		return;
-	}
-	sh_mmcif_get_response(host, cmd);
-	if (host->data) {
-		if (!host->dma_active) {
-			ret = sh_mmcif_data_trans(host, mrq, cmd->opcode);
-		} else {
-			long time =
-				wait_for_completion_interruptible_timeout(&host->dma_complete,
-									  host->timeout);
-			if (!time)
-				ret = -ETIMEDOUT;
-			else if (time < 0)
-				ret = time;
-			sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC,
-					BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
-			host->dma_active = false;
-		}
-		if (ret < 0)
-			mrq->data->bytes_xfered = 0;
-		else
-			mrq->data->bytes_xfered =
-				mrq->data->blocks * mrq->data->blksz;
-	}
-	cmd->error = ret;
+	host->wait_for = MMCIF_WAIT_FOR_CMD;
+	schedule_delayed_work(&host->timeout_work, host->timeout);
 }
 
 static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
 			      struct mmc_request *mrq)
 {
 	struct mmc_command *cmd = mrq->stop;
-	long time;
 
 	if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
 		sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
@@ -805,14 +863,8 @@ static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
 		return;
 	}
 
-	time = wait_for_completion_interruptible_timeout(&host->intr_wait,
-			host->timeout);
-	if (time <= 0 || host->sd_error) {
-		cmd->error = sh_mmcif_error_manage(host);
-		return;
-	}
-	sh_mmcif_get_cmd12response(host, cmd);
-	cmd->error = 0;
+	host->wait_for = MMCIF_WAIT_FOR_STOP;
+	schedule_delayed_work(&host->timeout_work, host->timeout);
 }
 
 static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
@@ -851,23 +903,11 @@ static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	default:
 		break;
 	}
+
+	host->mrq = mrq;
 	host->data = mrq->data;
-	if (mrq->data) {
-		if (mrq->data->flags & MMC_DATA_READ) {
-			if (host->chan_rx)
-				sh_mmcif_start_dma_rx(host);
-		} else {
-			if (host->chan_tx)
-				sh_mmcif_start_dma_tx(host);
-		}
-	}
-	sh_mmcif_start_cmd(host, mrq);
-	host->data = NULL;
 
-	if (!mrq->cmd->error && mrq->stop)
-		sh_mmcif_stop_cmd(host, mrq);
-	host->state = STATE_IDLE;
-	mmc_request_done(mmc, mrq);
+	sh_mmcif_start_cmd(host, mrq);
 }
 
 static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
@@ -942,6 +982,157 @@ static struct mmc_host_ops sh_mmcif_ops = {
 	.get_cd		= sh_mmcif_get_cd,
 };
 
+static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
+{
+	struct mmc_command *cmd = host->mrq->cmd;
+	long time;
+
+	if (host->sd_error) {
+		switch (cmd->opcode) {
+		case MMC_ALL_SEND_CID:
+		case MMC_SELECT_CARD:
+		case MMC_APP_CMD:
+			cmd->error = -ETIMEDOUT;
+			host->sd_error = false;
+			break;
+		default:
+			cmd->error = sh_mmcif_error_manage(host);
+			dev_dbg(&host->pd->dev, "Cmd(d'%d) error %d\n",
+				cmd->opcode, cmd->error);
+			break;
+		}
+		return false;
+	}
+	if (!(cmd->flags & MMC_RSP_PRESENT)) {
+		cmd->error = 0;
+		return false;
+	}
+
+	sh_mmcif_get_response(host, cmd);
+
+	if (!host->data)
+		return false;
+
+	if (host->mrq->data->flags & MMC_DATA_READ) {
+		if (host->chan_rx)
+			sh_mmcif_start_dma_rx(host);
+	} else {
+		if (host->chan_tx)
+			sh_mmcif_start_dma_tx(host);
+	}
+
+	if (!host->dma_active) {
+		host->data->error = sh_mmcif_data_trans(host, host->mrq, cmd->opcode);
+		if (!host->data->error)
+			return true;
+		return false;
+	}
+
+	/* Running in the IRQ thread, can sleep */
+	time = wait_for_completion_interruptible_timeout(&host->dma_complete,
+							 host->timeout);
+	if (host->sd_error) {
+		dev_err(host->mmc->parent,
+			"Error IRQ while waiting for DMA completion!\n");
+		/* Woken up by an error IRQ: abort DMA */
+		if (host->data->flags & MMC_DATA_READ)
+			dmaengine_terminate_all(host->chan_rx);
+		else
+			dmaengine_terminate_all(host->chan_tx);
+		host->data->error = sh_mmcif_error_manage(host);
+	} else if (!time) {
+		host->data->error = -ETIMEDOUT;
+	} else if (time < 0) {
+		host->data->error = time;
+	}
+	sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC,
+			BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
+	host->dma_active = false;
+
+	if (host->data->error)
+		host->data->bytes_xfered = 0;
+
+	return false;
+}
+
+static irqreturn_t sh_mmcif_irqt(int irq, void *dev_id)
+{
+	struct sh_mmcif_host *host = dev_id;
+	struct mmc_request *mrq = host->mrq;
+
+	cancel_delayed_work_sync(&host->timeout_work);
+
+	/*
+	 * All handlers return true, if processing continues, and false, if the
+	 * request has to be completed - successfully or not
+	 */
+	switch (host->wait_for) {
+	case MMCIF_WAIT_FOR_REQUEST:
+		/* We're too late, the timeout has already kicked in */
+		return IRQ_HANDLED;
+	case MMCIF_WAIT_FOR_CMD:
+		if (sh_mmcif_end_cmd(host))
+			/* Wait for data */
+			return IRQ_HANDLED;
+		break;
+	case MMCIF_WAIT_FOR_MREAD:
+		if (sh_mmcif_mread_block(host))
+			/* Wait for more data */
+			return IRQ_HANDLED;
+		break;
+	case MMCIF_WAIT_FOR_READ:
+		if (sh_mmcif_read_block(host))
+			/* Wait for data end */
+			return IRQ_HANDLED;
+		break;
+	case MMCIF_WAIT_FOR_MWRITE:
+		if (sh_mmcif_mwrite_block(host))
+			/* Wait data to write */
+			return IRQ_HANDLED;
+		break;
+	case MMCIF_WAIT_FOR_WRITE:
+		if (sh_mmcif_write_block(host))
+			/* Wait for data end */
+			return IRQ_HANDLED;
+		break;
+	case MMCIF_WAIT_FOR_STOP:
+		if (host->sd_error) {
+			mrq->stop->error = sh_mmcif_error_manage(host);
+			break;
+		}
+		sh_mmcif_get_cmd12response(host, mrq->stop);
+		mrq->stop->error = 0;
+		break;
+	case MMCIF_WAIT_FOR_READ_END:
+	case MMCIF_WAIT_FOR_WRITE_END:
+		if (host->sd_error)
+			mrq->data->error = sh_mmcif_error_manage(host);
+		break;
+	default:
+		BUG();
+	}
+
+	if (host->wait_for != MMCIF_WAIT_FOR_STOP) {
+		host->data = NULL;
+
+		if (!mrq->cmd->error && mrq->data && !mrq->data->error)
+			mrq->data->bytes_xfered =
+				mrq->data->blocks * mrq->data->blksz;
+
+		if (mrq->stop && !mrq->cmd->error && (!mrq->data || !mrq->data->error)) {
+			sh_mmcif_stop_cmd(host, mrq);
+			if (!mrq->stop->error)
+				return IRQ_HANDLED;
+		}
+	}
+
+	host->wait_for = MMCIF_WAIT_FOR_REQUEST;
+	host->state = STATE_IDLE;
+	mmc_request_done(host->mmc, mrq);
+
+	return IRQ_HANDLED;
+}
+
 static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 {
 	struct sh_mmcif_host *host = dev_id;
@@ -993,14 +1184,58 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 		host->sd_error = true;
 		dev_dbg(&host->pd->dev, "int err state = %08x\n", state);
 	}
-	if (state & ~(INT_CMD12RBE | INT_CMD12CRE))
-		complete(&host->intr_wait);
-	else
+	if (state & ~(INT_CMD12RBE | INT_CMD12CRE)) {
+		if (!host->dma_active)
+			return IRQ_WAKE_THREAD;
+		else if (host->sd_error)
+			mmcif_dma_complete(host);
+	} else {
 		dev_dbg(&host->pd->dev, "Unexpected IRQ 0x%x\n", state);
+	}
 
 	return IRQ_HANDLED;
 }
 
+static void mmcif_timeout_work(struct work_struct *work)
+{
+	struct delayed_work *d = container_of(work, struct delayed_work, work);
+	struct sh_mmcif_host *host = container_of(d, struct sh_mmcif_host, timeout_work);
+	struct mmc_request *mrq = host->mrq;
+
+	if (host->dying)
+		/* Don't run after mmc_remove_host() */
+		return;
+
+	/*
+	 * Handle races with cancel_delayed_work(), unless
+	 * cancel_delayed_work_sync() is used
+	 */
+	switch (host->wait_for) {
+	case MMCIF_WAIT_FOR_CMD:
+		mrq->cmd->error = sh_mmcif_error_manage(host);
+		break;
+	case MMCIF_WAIT_FOR_STOP:
+		mrq->stop->error = sh_mmcif_error_manage(host);
+		break;
+	case MMCIF_WAIT_FOR_MREAD:
+	case MMCIF_WAIT_FOR_MWRITE:
+	case MMCIF_WAIT_FOR_READ:
+	case MMCIF_WAIT_FOR_WRITE:
+	case MMCIF_WAIT_FOR_READ_END:
+	case MMCIF_WAIT_FOR_WRITE_END:
+		host->data->error = sh_mmcif_error_manage(host);
+		break;
+	default:
+		BUG();
+	}
+
+	host->state = STATE_IDLE;
+	host->wait_for = MMCIF_WAIT_FOR_REQUEST;
+	host->data = NULL;
+	host->mrq = NULL;
+	mmc_request_done(host->mmc, mrq);
+}
+
 static int __devinit sh_mmcif_probe(struct platform_device *pdev)
 {
 	int ret = 0, irq[2];
@@ -1054,7 +1289,6 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
 	host->clk = clk_get_rate(host->hclk);
 	host->pd = pdev;
 
-	init_completion(&host->intr_wait);
 	spin_lock_init(&host->lock);
 
 	mmc->ops = &sh_mmcif_ops;
@@ -1091,18 +1325,20 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
 
 	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
 
-	ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
+	ret = request_threaded_irq(irq[0], sh_mmcif_intr, sh_mmcif_irqt, 0, "sh_mmc:error", host);
 	if (ret) {
 		dev_err(&pdev->dev, "request_irq error (sh_mmc:error)\n");
 		goto clean_up3;
 	}
-	ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
+	ret = request_threaded_irq(irq[1], sh_mmcif_intr, sh_mmcif_irqt, 0, "sh_mmc:int", host);
 	if (ret) {
 		free_irq(irq[0], host);
 		dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
 		goto clean_up3;
 	}
 
+	INIT_DELAYED_WORK(&host->timeout_work, mmcif_timeout_work);
+
 	mmc_detect_change(host->mmc, 0);
 
 	dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION);
@@ -1129,11 +1365,19 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
 	struct sh_mmcif_host *host = platform_get_drvdata(pdev);
 	int irq[2];
 
+	host->dying = true;
 	pm_runtime_get_sync(&pdev->dev);
 
 	mmc_remove_host(host->mmc);
 	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
 
+	/*
+	 * FIXME: cancel_delayed_work(_sync)() and free_irq() race with the
+	 * mmc_remove_host() call above. But swapping order doesn't help either
+	 * (a query on the linux-mmc mailing list didn't bring any replies).
+	 */
+	cancel_delayed_work_sync(&host->timeout_work);
+
 	if (host->addr)
 		iounmap(host->addr);
 
-- 
cgit v1.2.3


From 699834045f1ec30156dd51c362a6840e737baaba Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Mon, 26 Dec 2011 12:52:13 -0500
Subject: mmc: sh_mmcif: remove now superfluous sh_mmcif_host::data member

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sh_mmcif.c | 94 ++++++++++++++++++++++++---------------------
 1 file changed, 50 insertions(+), 44 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 9371f3a4939b..4a2c5b2355f2 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -208,7 +208,6 @@ enum mmcif_wait_for {
 
 struct sh_mmcif_host {
 	struct mmc_host *mmc;
-	struct mmc_data *data;
 	struct mmc_request *mrq;
 	struct platform_device *pd;
 	struct sh_dmae_slave dma_slave_tx;
@@ -253,19 +252,21 @@ static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host,
 static void mmcif_dma_complete(void *arg)
 {
 	struct sh_mmcif_host *host = arg;
+	struct mmc_data *data = host->mrq->data;
+
 	dev_dbg(&host->pd->dev, "Command completed\n");
 
-	if (WARN(!host->data, "%s: NULL data in DMA completion!\n",
+	if (WARN(!data, "%s: NULL data in DMA completion!\n",
 		 dev_name(&host->pd->dev)))
 		return;
 
-	if (host->data->flags & MMC_DATA_READ)
+	if (data->flags & MMC_DATA_READ)
 		dma_unmap_sg(host->chan_rx->device->dev,
-			     host->data->sg, host->data->sg_len,
+			     data->sg, data->sg_len,
 			     DMA_FROM_DEVICE);
 	else
 		dma_unmap_sg(host->chan_tx->device->dev,
-			     host->data->sg, host->data->sg_len,
+			     data->sg, data->sg_len,
 			     DMA_TO_DEVICE);
 
 	complete(&host->dma_complete);
@@ -273,13 +274,14 @@ static void mmcif_dma_complete(void *arg)
 
 static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
 {
-	struct scatterlist *sg = host->data->sg;
+	struct mmc_data *data = host->mrq->data;
+	struct scatterlist *sg = data->sg;
 	struct dma_async_tx_descriptor *desc = NULL;
 	struct dma_chan *chan = host->chan_rx;
 	dma_cookie_t cookie = -EINVAL;
 	int ret;
 
-	ret = dma_map_sg(chan->device->dev, sg, host->data->sg_len,
+	ret = dma_map_sg(chan->device->dev, sg, data->sg_len,
 			 DMA_FROM_DEVICE);
 	if (ret > 0) {
 		host->dma_active = true;
@@ -295,7 +297,7 @@ static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
 		dma_async_issue_pending(chan);
 	}
 	dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n",
-		__func__, host->data->sg_len, ret, cookie);
+		__func__, data->sg_len, ret, cookie);
 
 	if (!desc) {
 		/* DMA failed, fall back to PIO */
@@ -316,18 +318,19 @@ static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
 	}
 
 	dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__,
-		desc, cookie, host->data->sg_len);
+		desc, cookie, data->sg_len);
 }
 
 static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
 {
-	struct scatterlist *sg = host->data->sg;
+	struct mmc_data *data = host->mrq->data;
+	struct scatterlist *sg = data->sg;
 	struct dma_async_tx_descriptor *desc = NULL;
 	struct dma_chan *chan = host->chan_tx;
 	dma_cookie_t cookie = -EINVAL;
 	int ret;
 
-	ret = dma_map_sg(chan->device->dev, sg, host->data->sg_len,
+	ret = dma_map_sg(chan->device->dev, sg, data->sg_len,
 			 DMA_TO_DEVICE);
 	if (ret > 0) {
 		host->dma_active = true;
@@ -343,7 +346,7 @@ static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
 		dma_async_issue_pending(chan);
 	}
 	dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n",
-		__func__, host->data->sg_len, ret, cookie);
+		__func__, data->sg_len, ret, cookie);
 
 	if (!desc) {
 		/* DMA failed, fall back to PIO */
@@ -711,8 +714,11 @@ static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
 }
 
 static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
-		struct mmc_request *mrq, struct mmc_command *cmd, u32 opc)
+			    struct mmc_request *mrq)
 {
+	struct mmc_data *data = mrq->data;
+	struct mmc_command *cmd = mrq->cmd;
+	u32 opc = cmd->opcode;
 	u32 tmp = 0;
 
 	/* Response Type check */
@@ -744,7 +750,7 @@ static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
 		break;
 	}
 	/* WDAT / DATW */
-	if (host->data) {
+	if (data) {
 		tmp |= CMD_SET_WDAT;
 		switch (host->bus_width) {
 		case MMC_BUS_WIDTH_1:
@@ -768,7 +774,7 @@ static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
 	if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) {
 		tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
 		sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET,
-					mrq->data->blocks << 16);
+				data->blocks << 16);
 	}
 	/* RIDXC[1:0] check bits */
 	if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID ||
@@ -782,7 +788,7 @@ static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
 		opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
 		tmp |= CMD_SET_CRC7C_INTERNAL;
 
-	return opc = ((opc << 24) | tmp);
+	return (opc << 24) | tmp;
 }
 
 static int sh_mmcif_data_trans(struct sh_mmcif_host *host,
@@ -830,12 +836,12 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
 		break;
 	}
 
-	if (host->data) {
+	if (mrq->data) {
 		sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0);
 		sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET,
 				mrq->data->blksz);
 	}
-	opc = sh_mmcif_set_cmd(host, mrq, cmd, opc);
+	opc = sh_mmcif_set_cmd(host, mrq);
 
 	sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0);
 	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask);
@@ -851,15 +857,16 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
 static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
 			      struct mmc_request *mrq)
 {
-	struct mmc_command *cmd = mrq->stop;
-
-	if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
+	switch (mrq->cmd->opcode) {
+	case MMC_READ_MULTIPLE_BLOCK:
 		sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
-	else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK)
+		break;
+	case MMC_WRITE_MULTIPLE_BLOCK:
 		sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
-	else {
+		break;
+	default:
 		dev_err(&host->pd->dev, "unsupported stop cmd\n");
-		cmd->error = sh_mmcif_error_manage(host);
+		mrq->stop->error = sh_mmcif_error_manage(host);
 		return;
 	}
 
@@ -905,7 +912,6 @@ static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	}
 
 	host->mrq = mrq;
-	host->data = mrq->data;
 
 	sh_mmcif_start_cmd(host, mrq);
 }
@@ -985,6 +991,7 @@ static struct mmc_host_ops sh_mmcif_ops = {
 static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
 {
 	struct mmc_command *cmd = host->mrq->cmd;
+	struct mmc_data *data = host->mrq->data;
 	long time;
 
 	if (host->sd_error) {
@@ -1010,10 +1017,10 @@ static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
 
 	sh_mmcif_get_response(host, cmd);
 
-	if (!host->data)
+	if (!data)
 		return false;
 
-	if (host->mrq->data->flags & MMC_DATA_READ) {
+	if (data->flags & MMC_DATA_READ) {
 		if (host->chan_rx)
 			sh_mmcif_start_dma_rx(host);
 	} else {
@@ -1022,8 +1029,8 @@ static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
 	}
 
 	if (!host->dma_active) {
-		host->data->error = sh_mmcif_data_trans(host, host->mrq, cmd->opcode);
-		if (!host->data->error)
+		data->error = sh_mmcif_data_trans(host, host->mrq, cmd->opcode);
+		if (!data->error)
 			return true;
 		return false;
 	}
@@ -1035,22 +1042,22 @@ static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host)
 		dev_err(host->mmc->parent,
 			"Error IRQ while waiting for DMA completion!\n");
 		/* Woken up by an error IRQ: abort DMA */
-		if (host->data->flags & MMC_DATA_READ)
+		if (data->flags & MMC_DATA_READ)
 			dmaengine_terminate_all(host->chan_rx);
 		else
 			dmaengine_terminate_all(host->chan_tx);
-		host->data->error = sh_mmcif_error_manage(host);
+		data->error = sh_mmcif_error_manage(host);
 	} else if (!time) {
-		host->data->error = -ETIMEDOUT;
+		data->error = -ETIMEDOUT;
 	} else if (time < 0) {
-		host->data->error = time;
+		data->error = time;
 	}
 	sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC,
 			BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
 	host->dma_active = false;
 
-	if (host->data->error)
-		host->data->bytes_xfered = 0;
+	if (data->error)
+		data->bytes_xfered = 0;
 
 	return false;
 }
@@ -1059,6 +1066,7 @@ static irqreturn_t sh_mmcif_irqt(int irq, void *dev_id)
 {
 	struct sh_mmcif_host *host = dev_id;
 	struct mmc_request *mrq = host->mrq;
+	struct mmc_data *data = mrq->data;
 
 	cancel_delayed_work_sync(&host->timeout_work);
 
@@ -1106,20 +1114,18 @@ static irqreturn_t sh_mmcif_irqt(int irq, void *dev_id)
 	case MMCIF_WAIT_FOR_READ_END:
 	case MMCIF_WAIT_FOR_WRITE_END:
 		if (host->sd_error)
-			mrq->data->error = sh_mmcif_error_manage(host);
+			data->error = sh_mmcif_error_manage(host);
 		break;
 	default:
 		BUG();
 	}
 
 	if (host->wait_for != MMCIF_WAIT_FOR_STOP) {
-		host->data = NULL;
+		if (!mrq->cmd->error && data && !data->error)
+			data->bytes_xfered =
+				data->blocks * data->blksz;
 
-		if (!mrq->cmd->error && mrq->data && !mrq->data->error)
-			mrq->data->bytes_xfered =
-				mrq->data->blocks * mrq->data->blksz;
-
-		if (mrq->stop && !mrq->cmd->error && (!mrq->data || !mrq->data->error)) {
+		if (mrq->stop && !mrq->cmd->error && (!data || !data->error)) {
 			sh_mmcif_stop_cmd(host, mrq);
 			if (!mrq->stop->error)
 				return IRQ_HANDLED;
@@ -1128,6 +1134,7 @@ static irqreturn_t sh_mmcif_irqt(int irq, void *dev_id)
 
 	host->wait_for = MMCIF_WAIT_FOR_REQUEST;
 	host->state = STATE_IDLE;
+	host->mrq = NULL;
 	mmc_request_done(host->mmc, mrq);
 
 	return IRQ_HANDLED;
@@ -1223,7 +1230,7 @@ static void mmcif_timeout_work(struct work_struct *work)
 	case MMCIF_WAIT_FOR_WRITE:
 	case MMCIF_WAIT_FOR_READ_END:
 	case MMCIF_WAIT_FOR_WRITE_END:
-		host->data->error = sh_mmcif_error_manage(host);
+		mrq->data->error = sh_mmcif_error_manage(host);
 		break;
 	default:
 		BUG();
@@ -1231,7 +1238,6 @@ static void mmcif_timeout_work(struct work_struct *work)
 
 	host->state = STATE_IDLE;
 	host->wait_for = MMCIF_WAIT_FOR_REQUEST;
-	host->data = NULL;
 	host->mrq = NULL;
 	mmc_request_done(host->mmc, mrq);
 }
-- 
cgit v1.2.3


From d83b6e035f983ec2833bf175ae093281b42ba551 Mon Sep 17 00:00:00 2001
From: Balaji TK <balajitk@ti.com>
Date: Tue, 20 Dec 2011 15:12:00 +0530
Subject: mmc: omap: remove clock rate hard coding

MMC master clock rate can vary for each instance of the MMC controller
on the device. Use clk_get_rate instead to get the value.

Signed-off-by: Balaji TK  <balajitk@ti.com>
Reviewed-by: Venkatraman S <svenkatr@ti.com>
Tested-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/omap_hsmmc.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index d5fe43d53c51..5b35c7e5a26d 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -120,7 +120,6 @@
 
 #define MMC_AUTOSUSPEND_DELAY	100
 #define MMC_TIMEOUT_MS		20
-#define OMAP_MMC_MASTER_CLOCK	96000000
 #define OMAP_MMC_MIN_CLOCK	400000
 #define OMAP_MMC_MAX_CLOCK	52000000
 #define DRIVER_NAME		"omap_hsmmc"
@@ -598,12 +597,12 @@ static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host)
 }
 
 /* Calculate divisor for the given clock frequency */
-static u16 calc_divisor(struct mmc_ios *ios)
+static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios)
 {
 	u16 dsor = 0;
 
 	if (ios->clock) {
-		dsor = DIV_ROUND_UP(OMAP_MMC_MASTER_CLOCK, ios->clock);
+		dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock);
 		if (dsor > 250)
 			dsor = 250;
 	}
@@ -623,7 +622,7 @@ static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host)
 
 	regval = OMAP_HSMMC_READ(host->base, SYSCTL);
 	regval = regval & ~(CLKD_MASK | DTO_MASK);
-	regval = regval | (calc_divisor(ios) << 6) | (DTO << 16);
+	regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16);
 	OMAP_HSMMC_WRITE(host->base, SYSCTL, regval);
 	OMAP_HSMMC_WRITE(host->base, SYSCTL,
 		OMAP_HSMMC_READ(host->base, SYSCTL) | ICE);
-- 
cgit v1.2.3


From 17e9ff559a7dbb7a6df332007d2ffcd3e7d83fba Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Mon, 26 Dec 2011 18:03:05 +0900
Subject: mmc: core: Add claiming of hosts during mmc_cache_ctrl

While calling mmc_cache_ctrl() a host is not claimed. This patch
adds the mmc_try_claim_host() for quick response in suspend.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/core.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index a2aa860956ef..22050525be84 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2355,7 +2355,13 @@ int mmc_suspend_host(struct mmc_host *host)
 		cancel_delayed_work(&host->disable);
 	cancel_delayed_work(&host->detect);
 	mmc_flush_scheduled_work();
-	err = mmc_cache_ctrl(host, 0);
+	if (mmc_try_claim_host(host)) {
+		err = mmc_cache_ctrl(host, 0);
+		mmc_do_release_host(host);
+	} else {
+		err = -EBUSY;
+	}
+
 	if (err)
 		goto out;
 
-- 
cgit v1.2.3


From ceb6143b2df81c8a554bd5de898087926568cc51 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 27 Dec 2011 15:48:41 +0200
Subject: mmc: sdhci: fix vmmc handling

Presently the vmmc regulator is enabled when the host
controller is added and disabled when it is removed.
However, the vmmc regulator should be under the control
of the upper layers via ->set_ios().  Make it so.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c | 43 +++++++++++++++++++++----------------------
 1 file changed, 21 insertions(+), 22 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index ab6018fc2338..6a35d0368117 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1170,7 +1170,7 @@ out:
 	host->clock = clock;
 }
 
-static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
+static int sdhci_set_power(struct sdhci_host *host, unsigned short power)
 {
 	u8 pwr = 0;
 
@@ -1193,13 +1193,13 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 	}
 
 	if (host->pwr == pwr)
-		return;
+		return -1;
 
 	host->pwr = pwr;
 
 	if (pwr == 0) {
 		sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
-		return;
+		return 0;
 	}
 
 	/*
@@ -1226,6 +1226,8 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 	 */
 	if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
 		mdelay(10);
+
+	return power;
 }
 
 /*****************************************************************************\
@@ -1307,12 +1309,17 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
 {
 	unsigned long flags;
+	int vdd_bit = -1;
 	u8 ctrl;
 
 	spin_lock_irqsave(&host->lock, flags);
 
-	if (host->flags & SDHCI_DEVICE_DEAD)
-		goto out;
+	if (host->flags & SDHCI_DEVICE_DEAD) {
+		spin_unlock_irqrestore(&host->lock, flags);
+		if (host->vmmc && ios->power_mode == MMC_POWER_OFF)
+			mmc_regulator_set_ocr(host->mmc, host->vmmc, 0);
+		return;
+	}
 
 	/*
 	 * Reset the chip on each power off.
@@ -1326,9 +1333,15 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
 	sdhci_set_clock(host, ios->clock);
 
 	if (ios->power_mode == MMC_POWER_OFF)
-		sdhci_set_power(host, -1);
+		vdd_bit = sdhci_set_power(host, -1);
 	else
-		sdhci_set_power(host, ios->vdd);
+		vdd_bit = sdhci_set_power(host, ios->vdd);
+
+	if (host->vmmc && vdd_bit != -1) {
+		spin_unlock_irqrestore(&host->lock, flags);
+		mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd_bit);
+		spin_lock_irqsave(&host->lock, flags);
+	}
 
 	if (host->ops->platform_send_init_74_clocks)
 		host->ops->platform_send_init_74_clocks(host, ios->power_mode);
@@ -1453,7 +1466,6 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
 	if(host->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
 		sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
 
-out:
 	mmiowb();
 	spin_unlock_irqrestore(&host->lock, flags);
 }
@@ -2357,9 +2369,6 @@ int sdhci_suspend_host(struct sdhci_host *host)
 
 	free_irq(host->irq, host);
 
-	if (host->vmmc)
-		ret = regulator_disable(host->vmmc);
-
 	return ret;
 }
 
@@ -2369,12 +2378,6 @@ int sdhci_resume_host(struct sdhci_host *host)
 {
 	int ret;
 
-	if (host->vmmc) {
-		int ret = regulator_enable(host->vmmc);
-		if (ret)
-			return ret;
-	}
-
 	if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
 		if (host->ops->enable_dma)
 			host->ops->enable_dma(host);
@@ -2936,8 +2939,6 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (IS_ERR(host->vmmc)) {
 		pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
 		host->vmmc = NULL;
-	} else {
-		regulator_enable(host->vmmc);
 	}
 
 	sdhci_init(host, 0);
@@ -3026,10 +3027,8 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
 	tasklet_kill(&host->card_tasklet);
 	tasklet_kill(&host->finish_tasklet);
 
-	if (host->vmmc) {
-		regulator_disable(host->vmmc);
+	if (host->vmmc)
 		regulator_put(host->vmmc);
-	}
 
 	kfree(host->adma_desc);
 	kfree(host->align_buffer);
-- 
cgit v1.2.3


From c79396c191bc19703df6eb6bbd0f673ed0df6c9d Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 27 Dec 2011 15:48:42 +0200
Subject: mmc: sdhci: prevent card detection activity for non-removable cards

Do not enable card detection interrupts for non-removable cards.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6a35d0368117..e6c6cd6e95f2 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -146,10 +146,9 @@ static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
 {
 	u32 present, irqs;
 
-	if (host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION)
-		return;
-
-	if (host->quirks2 & SDHCI_QUIRK2_OWN_CARD_DETECTION)
+	if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
+	    (host->quirks2 & SDHCI_QUIRK2_OWN_CARD_DETECTION) ||
+	    !mmc_card_is_removable(host->mmc))
 		return;
 
 	present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
-- 
cgit v1.2.3


From 52c506f0bc72530fb786838e7ffd4f158a2e5c3a Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 27 Dec 2011 15:48:43 +0200
Subject: mmc: sdhci-pci: add platform data

Add a means of getting platform data for the SDHCI PCI
devices.  The data is stored against the slot not the
device in order to support multi-slot devices.

The data allows platform-specific setup (such as getting
GPIO numbers from firmware or setting up wl12xx for SDIO)
to be done in platform support files instead of the
sdhci-pci driver.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/Makefile                   |  2 +-
 drivers/mmc/Makefile               |  3 +--
 drivers/mmc/host/Makefile          |  1 +
 drivers/mmc/host/sdhci-pci-data.c  |  5 +++++
 drivers/mmc/host/sdhci-pci.c       | 32 ++++++++++++++++++++++++++++----
 include/linux/mmc/sdhci-pci-data.h | 18 ++++++++++++++++++
 6 files changed, 54 insertions(+), 7 deletions(-)
 create mode 100644 drivers/mmc/host/sdhci-pci-data.c
 create mode 100644 include/linux/mmc/sdhci-pci-data.h

(limited to 'drivers')

diff --git a/drivers/Makefile b/drivers/Makefile
index 1b3142127bf5..c07be024b962 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -97,7 +97,7 @@ obj-$(CONFIG_EISA)		+= eisa/
 obj-y				+= lguest/
 obj-$(CONFIG_CPU_FREQ)		+= cpufreq/
 obj-$(CONFIG_CPU_IDLE)		+= cpuidle/
-obj-$(CONFIG_MMC)		+= mmc/
+obj-y				+= mmc/
 obj-$(CONFIG_MEMSTICK)		+= memstick/
 obj-y				+= leds/
 obj-$(CONFIG_INFINIBAND)	+= infiniband/
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 12eef393e216..400756ec7c49 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -6,5 +6,4 @@ subdir-ccflags-$(CONFIG_MMC_DEBUG) := -DDEBUG
 
 obj-$(CONFIG_MMC)		+= core/
 obj-$(CONFIG_MMC)		+= card/
-obj-$(CONFIG_MMC)		+= host/
-
+obj-$(subst m,y,$(CONFIG_MMC))	+= host/
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index b4b83f302e32..745f8fce2519 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_MMC_MXC)		+= mxcmmc.o
 obj-$(CONFIG_MMC_MXS)		+= mxs-mmc.o
 obj-$(CONFIG_MMC_SDHCI)		+= sdhci.o
 obj-$(CONFIG_MMC_SDHCI_PCI)	+= sdhci-pci.o
+obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI))	+= sdhci-pci-data.o
 obj-$(CONFIG_MMC_SDHCI_PXAV3)	+= sdhci-pxav3.o
 obj-$(CONFIG_MMC_SDHCI_PXAV2)	+= sdhci-pxav2.o
 obj-$(CONFIG_MMC_SDHCI_S3C)	+= sdhci-s3c.o
diff --git a/drivers/mmc/host/sdhci-pci-data.c b/drivers/mmc/host/sdhci-pci-data.c
new file mode 100644
index 000000000000..a611217769f5
--- /dev/null
+++ b/drivers/mmc/host/sdhci-pci-data.c
@@ -0,0 +1,5 @@
+#include <linux/module.h>
+#include <linux/mmc/sdhci-pci-data.h>
+
+struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev, int slotno);
+EXPORT_SYMBOL_GPL(sdhci_pci_get_data);
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index d2e77fb21b26..4e8f324e2c84 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -25,6 +25,7 @@
 #include <linux/gpio.h>
 #include <linux/sfi.h>
 #include <linux/pm_runtime.h>
+#include <linux/mmc/sdhci-pci-data.h>
 
 #include "sdhci.h"
 
@@ -61,6 +62,7 @@ struct sdhci_pci_fixes {
 struct sdhci_pci_slot {
 	struct sdhci_pci_chip	*chip;
 	struct sdhci_host	*host;
+	struct sdhci_pci_data	*data;
 
 	int			pci_bar;
 	int			rst_n_gpio;
@@ -1188,11 +1190,12 @@ static const struct dev_pm_ops sdhci_pci_pm_ops = {
 \*****************************************************************************/
 
 static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
-	struct pci_dev *pdev, struct sdhci_pci_chip *chip, int bar)
+	struct pci_dev *pdev, struct sdhci_pci_chip *chip, int first_bar,
+	int slotno)
 {
 	struct sdhci_pci_slot *slot;
 	struct sdhci_host *host;
-	int ret;
+	int ret, bar = first_bar + slotno;
 
 	if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
 		dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
@@ -1227,6 +1230,20 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
 	slot->pci_bar = bar;
 	slot->rst_n_gpio = -EINVAL;
 
+	/* Retrieve platform data if there is any */
+	if (*sdhci_pci_get_data)
+		slot->data = sdhci_pci_get_data(pdev, slotno);
+
+	if (slot->data) {
+		if (slot->data->setup) {
+			ret = slot->data->setup(slot->data);
+			if (ret) {
+				dev_err(&pdev->dev, "platform setup failed\n");
+				goto free;
+			}
+		}
+	}
+
 	host->hw_name = "PCI";
 	host->ops = &sdhci_pci_ops;
 	host->quirks = chip->quirks;
@@ -1236,7 +1253,7 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
 	ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc));
 	if (ret) {
 		dev_err(&pdev->dev, "cannot request region\n");
-		goto free;
+		goto cleanup;
 	}
 
 	host->ioaddr = pci_ioremap_bar(pdev, bar);
@@ -1270,6 +1287,10 @@ unmap:
 release:
 	pci_release_region(pdev, bar);
 
+cleanup:
+	if (slot->data && slot->data->cleanup)
+		slot->data->cleanup(slot->data);
+
 free:
 	sdhci_free_host(host);
 
@@ -1291,6 +1312,9 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 	if (slot->chip->fixes && slot->chip->fixes->remove_slot)
 		slot->chip->fixes->remove_slot(slot, dead);
 
+	if (slot->data && slot->data->cleanup)
+		slot->data->cleanup(slot->data);
+
 	pci_release_region(slot->chip->pdev, slot->pci_bar);
 
 	sdhci_free_host(slot->host);
@@ -1377,7 +1401,7 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
 	slots = chip->num_slots;	/* Quirk may have changed this */
 
 	for (i = 0; i < slots; i++) {
-		slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i);
+		slot = sdhci_pci_probe_slot(pdev, chip, first_bar, i);
 		if (IS_ERR(slot)) {
 			for (i--; i >= 0; i--)
 				sdhci_pci_remove_slot(chip->slots[i]);
diff --git a/include/linux/mmc/sdhci-pci-data.h b/include/linux/mmc/sdhci-pci-data.h
new file mode 100644
index 000000000000..8959604a13d3
--- /dev/null
+++ b/include/linux/mmc/sdhci-pci-data.h
@@ -0,0 +1,18 @@
+#ifndef LINUX_MMC_SDHCI_PCI_DATA_H
+#define LINUX_MMC_SDHCI_PCI_DATA_H
+
+struct pci_dev;
+
+struct sdhci_pci_data {
+	struct pci_dev	*pdev;
+	int		slotno;
+	int		rst_n_gpio; /* Set to -EINVAL if unused */
+	int		cd_gpio;    /* Set to -EINVAL if unused */
+	int		(*setup)(struct sdhci_pci_data *data);
+	void		(*cleanup)(struct sdhci_pci_data *data);
+};
+
+extern struct sdhci_pci_data *(*sdhci_pci_get_data)(struct pci_dev *pdev,
+				int slotno);
+
+#endif
-- 
cgit v1.2.3


From c5e027a4a19d6267e36107fc32b5a4f3cd27976a Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 27 Dec 2011 15:48:44 +0200
Subject: mmc: sdhci-pci: get gpio numbers from platform data

Retrieve the GPIO numbers for hardware reset and
card detect from platform data.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-pci.c | 109 ++++++++++++++++---------------------------
 1 file changed, 41 insertions(+), 68 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 4e8f324e2c84..646680a5993a 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -23,7 +23,6 @@
 #include <linux/scatterlist.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
-#include <linux/sfi.h>
 #include <linux/pm_runtime.h>
 #include <linux/mmc/sdhci-pci-data.h>
 
@@ -173,32 +172,9 @@ static int mrst_hc_probe(struct sdhci_pci_chip *chip)
 	return 0;
 }
 
-/* Medfield eMMC hardware reset GPIOs */
-static int mfd_emmc0_rst_gpio = -EINVAL;
-static int mfd_emmc1_rst_gpio = -EINVAL;
-
-static int mfd_emmc_gpio_parse(struct sfi_table_header *table)
-{
-	struct sfi_table_simple *sb = (struct sfi_table_simple *)table;
-	struct sfi_gpio_table_entry *entry;
-	int i, num;
-
-	num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry);
-	entry = (struct sfi_gpio_table_entry *)sb->pentry;
-
-	for (i = 0; i < num; i++, entry++) {
-		if (!strncmp(entry->pin_name, "emmc0_rst", SFI_NAME_LEN))
-			mfd_emmc0_rst_gpio = entry->pin_no;
-		else if (!strncmp(entry->pin_name, "emmc1_rst", SFI_NAME_LEN))
-			mfd_emmc1_rst_gpio = entry->pin_no;
-	}
-
-	return 0;
-}
-
 #ifdef CONFIG_PM_RUNTIME
 
-static irqreturn_t mfd_sd_cd(int irq, void *dev_id)
+static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
 {
 	struct sdhci_pci_slot *slot = dev_id;
 	struct sdhci_host *host = slot->host;
@@ -207,15 +183,16 @@ static irqreturn_t mfd_sd_cd(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-#define MFLD_SD_CD_PIN 69
-
-static int mfd_sd_probe_slot(struct sdhci_pci_slot *slot)
+static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
 {
-	int err, irq, gpio = MFLD_SD_CD_PIN;
+	int err, irq, gpio = slot->cd_gpio;
 
 	slot->cd_gpio = -EINVAL;
 	slot->cd_irq = -EINVAL;
 
+	if (!gpio_is_valid(gpio))
+		return;
+
 	err = gpio_request(gpio, "sd_cd");
 	if (err < 0)
 		goto out;
@@ -228,7 +205,7 @@ static int mfd_sd_probe_slot(struct sdhci_pci_slot *slot)
 	if (irq < 0)
 		goto out_free;
 
-	err = request_irq(irq, mfd_sd_cd, IRQF_TRIGGER_RISING |
+	err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
 			  IRQF_TRIGGER_FALLING, "sd_cd", slot);
 	if (err)
 		goto out_free;
@@ -237,65 +214,41 @@ static int mfd_sd_probe_slot(struct sdhci_pci_slot *slot)
 	slot->cd_irq = irq;
 	slot->host->quirks2 |= SDHCI_QUIRK2_OWN_CARD_DETECTION;
 
-	return 0;
+	return;
 
 out_free:
 	gpio_free(gpio);
 out:
 	dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n");
-	return 0;
 }
 
-static void mfd_sd_remove_slot(struct sdhci_pci_slot *slot, int dead)
+static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
 {
 	if (slot->cd_irq >= 0)
 		free_irq(slot->cd_irq, slot);
-	gpio_free(slot->cd_gpio);
+	if (gpio_is_valid(slot->cd_gpio))
+		gpio_free(slot->cd_gpio);
 }
 
 #else
 
-#define mfd_sd_probe_slot	NULL
-#define mfd_sd_remove_slot	NULL
+static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
+{
+}
+
+static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
+{
+}
 
 #endif
 
 static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
 {
-	const char *name = NULL;
-	int gpio = -EINVAL;
-
-	sfi_table_parse(SFI_SIG_GPIO, NULL, NULL, mfd_emmc_gpio_parse);
-
-	switch (slot->chip->pdev->device) {
-	case PCI_DEVICE_ID_INTEL_MFD_EMMC0:
-		gpio = mfd_emmc0_rst_gpio;
-		name = "eMMC0_reset";
-		break;
-	case PCI_DEVICE_ID_INTEL_MFD_EMMC1:
-		gpio = mfd_emmc1_rst_gpio;
-		name = "eMMC1_reset";
-		break;
-	}
-
-	if (!gpio_request(gpio, name)) {
-		gpio_direction_output(gpio, 1);
-		slot->rst_n_gpio = gpio;
-		slot->host->mmc->caps |= MMC_CAP_HW_RESET;
-	}
-
 	slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
-
 	slot->host->mmc->caps2 = MMC_CAP2_BOOTPART_NOACC;
-
 	return 0;
 }
 
-static void mfd_emmc_remove_slot(struct sdhci_pci_slot *slot, int dead)
-{
-	gpio_free(slot->rst_n_gpio);
-}
-
 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
 	.quirks		= SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
 	.probe_slot	= mrst_hc_probe_slot,
@@ -309,8 +262,6 @@ static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
 static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 	.allow_runtime_pm = true,
-	.probe_slot	= mfd_sd_probe_slot,
-	.remove_slot	= mfd_sd_remove_slot,
 };
 
 static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
@@ -322,7 +273,6 @@ static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 	.allow_runtime_pm = true,
 	.probe_slot	= mfd_emmc_probe_slot,
-	.remove_slot	= mfd_emmc_remove_slot,
 };
 
 /* O2Micro extra registers */
@@ -1229,6 +1179,7 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
 	slot->host = host;
 	slot->pci_bar = bar;
 	slot->rst_n_gpio = -EINVAL;
+	slot->cd_gpio = -EINVAL;
 
 	/* Retrieve platform data if there is any */
 	if (*sdhci_pci_get_data)
@@ -1242,6 +1193,8 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
 				goto free;
 			}
 		}
+		slot->rst_n_gpio = slot->data->rst_n_gpio;
+		slot->cd_gpio = slot->data->cd_gpio;
 	}
 
 	host->hw_name = "PCI";
@@ -1269,15 +1222,30 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
 			goto unmap;
 	}
 
+	if (gpio_is_valid(slot->rst_n_gpio)) {
+		if (!gpio_request(slot->rst_n_gpio, "eMMC_reset")) {
+			gpio_direction_output(slot->rst_n_gpio, 1);
+			slot->host->mmc->caps |= MMC_CAP_HW_RESET;
+		} else {
+			dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
+			slot->rst_n_gpio = -EINVAL;
+		}
+	}
+
 	host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
 
 	ret = sdhci_add_host(host);
 	if (ret)
 		goto remove;
 
+	sdhci_pci_add_own_cd(slot);
+
 	return slot;
 
 remove:
+	if (gpio_is_valid(slot->rst_n_gpio))
+		gpio_free(slot->rst_n_gpio);
+
 	if (chip->fixes && chip->fixes->remove_slot)
 		chip->fixes->remove_slot(slot, 0);
 
@@ -1302,6 +1270,8 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 	int dead;
 	u32 scratch;
 
+	sdhci_pci_remove_own_cd(slot);
+
 	dead = 0;
 	scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
 	if (scratch == (u32)-1)
@@ -1309,6 +1279,9 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 
 	sdhci_remove_host(slot->host, dead);
 
+	if (gpio_is_valid(slot->rst_n_gpio))
+		gpio_free(slot->rst_n_gpio);
+
 	if (slot->chip->fixes && slot->chip->fixes->remove_slot)
 		slot->chip->fixes->remove_slot(slot, dead);
 
-- 
cgit v1.2.3


From e2a0a5829c4069ee4a0f28c7301187ffaba91a46 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 27 Dec 2011 15:48:45 +0200
Subject: mmc: sdhci-pci: remove SDHCI_QUIRK2_OWN_CARD_DETECTION

Even if a driver provides separate card detection, an interrupt
is still needed to abort mmc requests that are in progress.
SDHCI_QUIRK2_OWN_CARD_DETECTION prevents that, so remove it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-pci.c | 1 -
 drivers/mmc/host/sdhci.c     | 1 -
 include/linux/mmc/sdhci.h    | 2 --
 3 files changed, 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 646680a5993a..83a152e9b976 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -212,7 +212,6 @@ static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
 
 	slot->cd_gpio = gpio;
 	slot->cd_irq = irq;
-	slot->host->quirks2 |= SDHCI_QUIRK2_OWN_CARD_DETECTION;
 
 	return;
 
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index e6c6cd6e95f2..6f1fd02fe01b 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -147,7 +147,6 @@ static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
 	u32 present, irqs;
 
 	if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
-	    (host->quirks2 & SDHCI_QUIRK2_OWN_CARD_DETECTION) ||
 	    !mmc_card_is_removable(host->mmc))
 		return;
 
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index e4b69353678d..dad7a469f09c 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -90,8 +90,6 @@ struct sdhci_host {
 
 	unsigned int quirks2;	/* More deviations from spec. */
 
-#define SDHCI_QUIRK2_OWN_CARD_DETECTION			(1<<0)
-
 	int irq;		/* Device IRQ */
 	void __iomem *ioaddr;	/* Mapped address */
 
-- 
cgit v1.2.3


From 30832ab56c80d96cfaf5a786524f0d8c57fadfa1 Mon Sep 17 00:00:00 2001
From: Todd Poynor <toddpoynor@google.com>
Date: Tue, 27 Dec 2011 15:48:46 +0200
Subject: mmc: sdhci: Always pass clock request value zero to set_clock host op

To allow the set_clock host op to disable the SDCLK source when not
needed, always call the host op when the requested clock speed is
zero.  Do this even if host->clock already equals zero, because
the SDHCI driver may set that value (without calling the host op)
to force an update at the next (non-zero-speed) call.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6f1fd02fe01b..e06299734f5d 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1068,7 +1068,7 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 	u16 clk = 0;
 	unsigned long timeout;
 
-	if (clock == host->clock)
+	if (clock && clock == host->clock)
 		return;
 
 	host->mmc->actual_clock = 0;
-- 
cgit v1.2.3


From 93933508ce3753b9ef1fefb75531b5b1622de03f Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 27 Dec 2011 15:48:47 +0200
Subject: mmc: sdhci-pci: enable runtime PM for Medfield SDIO

Runtime PM for SDIO is no longer enabled by default (see
5c7f0e083d2d98ba14ddd10e88f001a0ead4cae4) so it must now
be enabled per platform, in this case Medfield uses it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-pci.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 83a152e9b976..7165e6a09274 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -248,6 +248,12 @@ static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
 	return 0;
 }
 
+static int mfd_sdio_probe_slot(struct sdhci_pci_slot *slot)
+{
+	slot->host->mmc->caps |= MMC_CAP_POWER_OFF_CARD;
+	return 0;
+}
+
 static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
 	.quirks		= SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
 	.probe_slot	= mrst_hc_probe_slot,
@@ -266,6 +272,7 @@ static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = {
 static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
 	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 	.allow_runtime_pm = true,
+	.probe_slot	= mfd_sdio_probe_slot,
 };
 
 static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
-- 
cgit v1.2.3


From 7efab4f35740c63502e438886cf1e4aa3f3b800f Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Fri, 30 Dec 2011 12:35:13 +1100
Subject: mmc: omap_hsmmc: use threaded irq handler for card-detect.

As the card-detect irq handler just schedules work to be done by a
thread, we can use request_threaded_irq to do much of the work for
us.  This means that interrupts which arrive by handle_nested_irq
actually work.

Reviewed-by: Felipe Balbi <balbi@ti.com>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Kishore Kadiyala <kishorek.kadiyala@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/omap_hsmmc.c | 36 +++++++++---------------------------
 1 file changed, 9 insertions(+), 27 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 5b35c7e5a26d..09fc4f8967ad 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -24,7 +24,6 @@
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
-#include <linux/workqueue.h>
 #include <linux/timer.h>
 #include <linux/clk.h>
 #include <linux/mmc/host.h>
@@ -162,7 +161,6 @@ struct omap_hsmmc_host {
 	 */
 	struct	regulator	*vcc;
 	struct	regulator	*vcc_aux;
-	struct	work_struct	mmc_carddetect_work;
 	void	__iomem		*base;
 	resource_size_t		mapbase;
 	spinlock_t		irq_lock; /* Prevent races with irq handler */
@@ -1279,17 +1277,16 @@ static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host)
 }
 
 /*
- * Work Item to notify the core about card insertion/removal
+ * irq handler to notify the core about card insertion/removal
  */
-static void omap_hsmmc_detect(struct work_struct *work)
+static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id)
 {
-	struct omap_hsmmc_host *host =
-		container_of(work, struct omap_hsmmc_host, mmc_carddetect_work);
+	struct omap_hsmmc_host *host = dev_id;
 	struct omap_mmc_slot_data *slot = &mmc_slot(host);
 	int carddetect;
 
 	if (host->suspended)
-		return;
+		return IRQ_HANDLED;
 
 	sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
 
@@ -1304,19 +1301,6 @@ static void omap_hsmmc_detect(struct work_struct *work)
 		mmc_detect_change(host->mmc, (HZ * 200) / 1000);
 	else
 		mmc_detect_change(host->mmc, (HZ * 50) / 1000);
-}
-
-/*
- * ISR for handling card insertion and removal
- */
-static irqreturn_t omap_hsmmc_cd_handler(int irq, void *dev_id)
-{
-	struct omap_hsmmc_host *host = (struct omap_hsmmc_host *)dev_id;
-
-	if (host->suspended)
-		return IRQ_HANDLED;
-	schedule_work(&host->mmc_carddetect_work);
-
 	return IRQ_HANDLED;
 }
 
@@ -1918,7 +1902,6 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
 	host->next_data.cookie = 1;
 
 	platform_set_drvdata(pdev, host);
-	INIT_WORK(&host->mmc_carddetect_work, omap_hsmmc_detect);
 
 	mmc->ops	= &omap_hsmmc_ops;
 
@@ -2046,10 +2029,11 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
 
 	/* Request IRQ for card detect */
 	if ((mmc_slot(host).card_detect_irq)) {
-		ret = request_irq(mmc_slot(host).card_detect_irq,
-				  omap_hsmmc_cd_handler,
-				  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-				  mmc_hostname(mmc), host);
+		ret = request_threaded_irq(mmc_slot(host).card_detect_irq,
+					   NULL,
+					   omap_hsmmc_detect,
+					   IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+					   mmc_hostname(mmc), host);
 		if (ret) {
 			dev_dbg(mmc_dev(host->mmc),
 				"Unable to grab MMC CD IRQ\n");
@@ -2128,7 +2112,6 @@ static int omap_hsmmc_remove(struct platform_device *pdev)
 		free_irq(host->irq, host);
 		if (mmc_slot(host).card_detect_irq)
 			free_irq(mmc_slot(host).card_detect_irq, host);
-		flush_work_sync(&host->mmc_carddetect_work);
 
 		pm_runtime_put_sync(host->dev);
 		pm_runtime_disable(host->dev);
@@ -2175,7 +2158,6 @@ static int omap_hsmmc_suspend(struct device *dev)
 				return ret;
 			}
 		}
-		cancel_work_sync(&host->mmc_carddetect_work);
 		ret = mmc_suspend_host(host->mmc);
 
 		if (ret == 0) {
-- 
cgit v1.2.3


From aa9df4fb2adcc73d36fa41e23059519be770aaa5 Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@stericsson.com>
Date: Mon, 19 Dec 2011 16:24:19 +0100
Subject: mmc: core: Add option to prevent eMMC sleep command

Host may now use MMC_CAP2_NO_SLEEP_CMD to disable the use
of eMMC sleep/awake command.

This option can be used when your platform has a buggy
kernel crash dump software, which is supposed to store
the dump on the eMMC, but is not able to wake up the eMMC
from sleep state.

In particular, failures have been seen with u-boot; even if
it is fixed there, platforms will be slow to update their
bootloader binaries.

Signed-off-by: Ulf Hansson <ulf.hansson@stericsson.com>
Reviewed-by: Hanumath Prasad <hanumath.prasad@stericsson.com>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Acked-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/core.c  | 6 ++++++
 include/linux/mmc/host.h | 1 +
 2 files changed, 7 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 22050525be84..be7569f3fb56 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2246,6 +2246,9 @@ int mmc_card_awake(struct mmc_host *host)
 {
 	int err = -ENOSYS;
 
+	if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD)
+		return 0;
+
 	mmc_bus_get(host);
 
 	if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
@@ -2261,6 +2264,9 @@ int mmc_card_sleep(struct mmc_host *host)
 {
 	int err = -ENOSYS;
 
+	if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD)
+		return 0;
+
 	mmc_bus_get(host);
 
 	if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep)
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 742f0e102e1e..031d865167a2 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -247,6 +247,7 @@ struct mmc_host {
 #define MMC_CAP2_CACHE_CTRL	(1 << 1)	/* Allow cache control */
 #define MMC_CAP2_POWEROFF_NOTIFY (1 << 2)	/* Notify poweroff supported */
 #define MMC_CAP2_NO_MULTI_READ	(1 << 3)	/* Multiblock reads don't work */
+#define MMC_CAP2_NO_SLEEP_CMD	(1 << 4)	/* Don't allow sleep command */
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
 	unsigned int        power_notify_type;
-- 
cgit v1.2.3


From c6ced0db08010ed75df221a2946c5228454b38d5 Mon Sep 17 00:00:00 2001
From: Aaron Lu <aaron.lu@amd.com>
Date: Wed, 28 Dec 2011 11:11:12 +0800
Subject: mmc: sdhci: Fix tuning timer incorrect setting when suspending host

When suspending host, the tuning timer shoule be deactivated.
And the HOST_NEEDS_TUNING flag should be set after tuning timer is
deactivated.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Aaron Lu <aaron.lu@amd.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index e06299734f5d..988ae06d1a09 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2356,9 +2356,8 @@ int sdhci_suspend_host(struct sdhci_host *host)
 	/* Disable tuning since we are suspending */
 	if (host->version >= SDHCI_SPEC_300 && host->tuning_count &&
 	    host->tuning_mode == SDHCI_TUNING_MODE_1) {
+		del_timer_sync(&host->tuning_timer);
 		host->flags &= ~SDHCI_NEEDS_RETUNING;
-		mod_timer(&host->tuning_timer, jiffies +
-			host->tuning_count * HZ);
 	}
 
 	ret = mmc_suspend_host(host->mmc);
-- 
cgit v1.2.3


From dd8df17fe83483d7ea06ff229895e35a42071599 Mon Sep 17 00:00:00 2001
From: Alexander Elbs <alex@segv.de>
Date: Tue, 3 Jan 2012 23:26:53 -0500
Subject: mmc: sd: Fix SDR12 timing regression

This patch fixes a failure to recognize SD cards reported on a Dell
Vostro with O2 Micro SD card reader.  Patch 49c468f ("mmc: sd: add
support for uhs bus speed mode selection") caused the problem, by
setting the SDHCI_CTRL_HISPD flag even for legacy timings.

Signed-off-by: Alexander Elbs <alex@segv.de>
Acked-by: Philip Rakity <prakity@marvell.com>
Acked-by: Arindam Nath <arindam.nath@amd.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 988ae06d1a09..3d338b4b416a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1385,8 +1385,7 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
 		if ((ios->timing == MMC_TIMING_UHS_SDR50) ||
 		    (ios->timing == MMC_TIMING_UHS_SDR104) ||
 		    (ios->timing == MMC_TIMING_UHS_DDR50) ||
-		    (ios->timing == MMC_TIMING_UHS_SDR25) ||
-		    (ios->timing == MMC_TIMING_UHS_SDR12))
+		    (ios->timing == MMC_TIMING_UHS_SDR25))
 			ctrl |= SDHCI_CTRL_HISPD;
 
 		ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
-- 
cgit v1.2.3


From 3f514291df96e0a34bc61c7c456ca1d3fdc1f1bb Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Mon, 2 Jan 2012 16:00:02 +0900
Subject: mmc: dw_mmc: Clear the DDR mode for non-DDR

UHS_REG should be cleared for non-DDR mode. But currently there is
no way to clear DDR mode, if it is already set once. This patch adds
clearing DDR mode for non-DDR mode.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/dw_mmc.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index c583b943f615..94e223825a45 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -707,12 +707,15 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		break;
 	}
 
+	regs = mci_readl(slot->host, UHS_REG);
+
 	/* DDR mode set */
-	if (ios->timing == MMC_TIMING_UHS_DDR50) {
-		regs = mci_readl(slot->host, UHS_REG);
+	if (ios->timing == MMC_TIMING_UHS_DDR50)
 		regs |= (0x1 << slot->id) << 16;
-		mci_writel(slot->host, UHS_REG, regs);
-	}
+	else
+		regs &= ~(0x1 << slot->id) << 16;
+
+	mci_writel(slot->host, UHS_REG, regs);
 
 	if (ios->clock) {
 		/*
-- 
cgit v1.2.3


From 38a60ea2e7b33ab33ee11d6ef527f259edb102cf Mon Sep 17 00:00:00 2001
From: Aaron Lu <aaron.lu@amd.com>
Date: Wed, 4 Jan 2012 10:07:43 +0800
Subject: mmc: sdhci: Deal with failure case in sdhci_suspend_host

If there are errors happened in sdhci_suspend_host, handle it so that
when the function returns with an error, the host's behaviour is the
same before this function call, e.g. card detection is enabled and
tuning timer is active, etc.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Aaron Lu <aaron.lu@amd.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 3d338b4b416a..0636e9a587b1 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2349,19 +2349,30 @@ out:
 int sdhci_suspend_host(struct sdhci_host *host)
 {
 	int ret;
+	bool has_tuning_timer;
 
 	sdhci_disable_card_detection(host);
 
 	/* Disable tuning since we are suspending */
-	if (host->version >= SDHCI_SPEC_300 && host->tuning_count &&
-	    host->tuning_mode == SDHCI_TUNING_MODE_1) {
+	has_tuning_timer = host->version >= SDHCI_SPEC_300 &&
+		host->tuning_count && host->tuning_mode == SDHCI_TUNING_MODE_1;
+	if (has_tuning_timer) {
 		del_timer_sync(&host->tuning_timer);
 		host->flags &= ~SDHCI_NEEDS_RETUNING;
 	}
 
 	ret = mmc_suspend_host(host->mmc);
-	if (ret)
+	if (ret) {
+		if (has_tuning_timer) {
+			host->flags |= SDHCI_NEEDS_RETUNING;
+			mod_timer(&host->tuning_timer, jiffies +
+					host->tuning_count * HZ);
+		}
+
+		sdhci_enable_card_detection(host);
+
 		return ret;
+	}
 
 	free_irq(host->irq, host);
 
-- 
cgit v1.2.3


From 984589e59f5796b4ef9a778c6a1937fc9319c423 Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@st.com>
Date: Wed, 4 Jan 2012 11:48:42 +0530
Subject: mmc: sdhci-spear: Fix compilation error
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

With the inclusion of following patch (59b5bc3929b37):
"mmc: sdhci: remove "state" argument from sdhci_suspend_host"

we get a compilation error for sdhci-spear:
drivers/mmc/host/sdhci-spear.c:283:2: error: too many arguments to function
‘sdhci_suspend_host’

This patch fixes this error.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci-spear.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c
index 883548eaa09e..b7f8b33c5f19 100644
--- a/drivers/mmc/host/sdhci-spear.c
+++ b/drivers/mmc/host/sdhci-spear.c
@@ -277,10 +277,9 @@ static int sdhci_suspend(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	struct spear_sdhci *sdhci = dev_get_platdata(dev);
-	pm_message_t state = {.event = 0};
 	int ret;
 
-	ret = sdhci_suspend_host(host, state);
+	ret = sdhci_suspend_host(host);
 	if (!ret)
 		clk_disable(sdhci->clk);
 
-- 
cgit v1.2.3


From 8bc0678b845531221ba2ea6efe34db66e587705b Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Fri, 9 Dec 2011 17:47:17 +0900
Subject: mmc: core: Separate the timeout value for cache-ctrl

Turning the cache off implies flushing cache which doesn't define
maximum timeout unlike cache-on. This patch will apply the generic
CMD6 timeout only for cache-on. Additionally the kernel message is
added for checking failure case of cache-on.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/core.c | 21 ++++++++++++---------
 drivers/mmc/core/mmc.c  | 13 +++++++++++--
 2 files changed, 23 insertions(+), 11 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index be7569f3fb56..1da45e051328 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2321,6 +2321,7 @@ EXPORT_SYMBOL(mmc_flush_cache);
 int mmc_cache_ctrl(struct mmc_host *host, u8 enable)
 {
 	struct mmc_card *card = host->card;
+	unsigned int timeout;
 	int err = 0;
 
 	if (!(host->caps2 & MMC_CAP2_CACHE_CTRL) ||
@@ -2331,16 +2332,18 @@ int mmc_cache_ctrl(struct mmc_host *host, u8 enable)
 			(card->ext_csd.cache_size > 0)) {
 		enable = !!enable;
 
-		if (card->ext_csd.cache_ctrl ^ enable)
+		if (card->ext_csd.cache_ctrl ^ enable) {
+			timeout = enable ? card->ext_csd.generic_cmd6_time : 0;
 			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-					EXT_CSD_CACHE_CTRL, enable, 0);
-		if (err)
-			pr_err("%s: cache %s error %d\n",
-					mmc_hostname(card->host),
-					enable ? "on" : "off",
-					err);
-		else
-			card->ext_csd.cache_ctrl = enable;
+					EXT_CSD_CACHE_CTRL, enable, timeout);
+			if (err)
+				pr_err("%s: cache %s error %d\n",
+						mmc_hostname(card->host),
+						enable ? "on" : "off",
+						err);
+			else
+				card->ext_csd.cache_ctrl = enable;
+		}
 	}
 
 	return err;
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index f0a9f1fbd1f6..67f346e0d105 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1077,14 +1077,23 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
 			card->ext_csd.cache_size > 0) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-				EXT_CSD_CACHE_CTRL, 1, 0);
+				EXT_CSD_CACHE_CTRL, 1,
+				card->ext_csd.generic_cmd6_time);
 		if (err && err != -EBADMSG)
 			goto free_card;
 
 		/*
 		 * Only if no error, cache is turned on successfully.
 		 */
-		card->ext_csd.cache_ctrl = err ? 0 : 1;
+		if (err) {
+			pr_warning("%s: Cache is supported, "
+					"but failed to turn on (%d)\n",
+					mmc_hostname(card->host), err);
+			card->ext_csd.cache_ctrl = 0;
+			err = 0;
+		} else {
+			card->ext_csd.cache_ctrl = 1;
+		}
 	}
 
 	if (!oldcard)
-- 
cgit v1.2.3


From ee5d19b20a711dca3848450979e3cd20b6b795cc Mon Sep 17 00:00:00 2001
From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Thu, 5 Jan 2012 19:12:57 +0900
Subject: mmc: dw_mmc: fixed wrong bit operation for SDMMC_GET_FCNT()

In status register, fifo_count is bit[29:17].
(0x1FFF is correct)

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Will Newton <will.newton@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/dw_mmc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 72c071f6e001..df392a1143f2 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -126,7 +126,7 @@
 #define SDMMC_CMD_RESP_EXP		BIT(6)
 #define SDMMC_CMD_INDX(n)		((n) & 0x1F)
 /* Status register defines */
-#define SDMMC_GET_FCNT(x)		(((x)>>17) & 0x1FF)
+#define SDMMC_GET_FCNT(x)		(((x)>>17) & 0x1FFF)
 /* Internal DMAC interrupt defines */
 #define SDMMC_IDMAC_INT_AI		BIT(9)
 #define SDMMC_IDMAC_INT_NI		BIT(8)
-- 
cgit v1.2.3


From a4924c71aa43d4f8a3f342b1f71788349472e684 Mon Sep 17 00:00:00 2001
From: Girish K S <girish.shivananjappa@linaro.org>
Date: Wed, 11 Jan 2012 14:04:52 -0500
Subject: mmc: core: HS200 mode support for eMMC 4.5

This patch adds the support of the HS200 bus speed for eMMC 4.5 devices.
The eMMC 4.5 devices have support for 200MHz bus speed. The function
prototype of the tuning function is modified to handle the tuning
command number which is different in sd and mmc case.

Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/bus.c     |   3 +-
 drivers/mmc/core/debugfs.c |   3 +
 drivers/mmc/core/mmc.c     | 162 ++++++++++++++++++++++++++++++++++++++++++---
 drivers/mmc/core/sd.c      |   3 +-
 drivers/mmc/core/sdio.c    |   4 +-
 include/linux/mmc/card.h   |   3 +
 include/linux/mmc/host.h   |  11 ++-
 include/linux/mmc/mmc.h    |  66 +++++++++++++++++-
 8 files changed, 241 insertions(+), 14 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index f8a228a61fd4..5d011a39dfff 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -303,10 +303,11 @@ int mmc_add_card(struct mmc_card *card)
 			mmc_card_ddr_mode(card) ? "DDR " : "",
 			type);
 	} else {
-		printk(KERN_INFO "%s: new %s%s%s card at address %04x\n",
+		pr_info("%s: new %s%s%s%s card at address %04x\n",
 			mmc_hostname(card->host),
 			mmc_card_uhs(card) ? "ultra high speed " :
 			(mmc_card_highspeed(card) ? "high speed " : ""),
+			(mmc_card_hs200(card) ? "HS200 " : ""),
 			mmc_card_ddr_mode(card) ? "DDR " : "",
 			type, card->rca);
 	}
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index 027615d3bf3e..9ab5b17d488a 100644
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -135,6 +135,9 @@ static int mmc_ios_show(struct seq_file *s, void *data)
 	case MMC_TIMING_UHS_DDR50:
 		str = "sd uhs DDR50";
 		break;
+	case MMC_TIMING_MMC_HS200:
+		str = "mmc high-speed SDR200";
+		break;
 	default:
 		str = "invalid";
 		break;
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 67f346e0d105..59b9ba52e66a 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -286,6 +286,27 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 	}
 	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
 	switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
+	case EXT_CSD_CARD_TYPE_SDR_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_200;
+		break;
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_2V;
+		break;
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_8V;
+		break;
 	case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
 	     EXT_CSD_CARD_TYPE_26:
 		card->ext_csd.hs_max_dtr = 52000000;
@@ -699,6 +720,79 @@ static int mmc_select_powerclass(struct mmc_card *card,
 	return err;
 }
 
+/*
+ * Selects the desired buswidth and switch to the HS200 mode
+ * if bus width set without error
+ */
+static int mmc_select_hs200(struct mmc_card *card)
+{
+	int idx, err = 0;
+	struct mmc_host *host;
+	static unsigned ext_csd_bits[] = {
+		EXT_CSD_BUS_WIDTH_4,
+		EXT_CSD_BUS_WIDTH_8,
+	};
+	static unsigned bus_widths[] = {
+		MMC_BUS_WIDTH_4,
+		MMC_BUS_WIDTH_8,
+	};
+
+	BUG_ON(!card);
+
+	host = card->host;
+
+	if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
+	    host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
+		if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0))
+			err = mmc_set_signal_voltage(host,
+						     MMC_SIGNAL_VOLTAGE_180, 0);
+
+	/* If fails try again during next card power cycle */
+	if (err)
+		goto err;
+
+	idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
+
+	/*
+	 * Unlike SD, MMC cards dont have a configuration register to notify
+	 * supported bus width. So bus test command should be run to identify
+	 * the supported bus width or compare the ext csd values of current
+	 * bus width and ext csd values of 1 bit mode read earlier.
+	 */
+	for (; idx >= 0; idx--) {
+
+		/*
+		 * Host is capable of 8bit transfer, then switch
+		 * the device to work in 8bit transfer mode. If the
+		 * mmc switch command returns error then switch to
+		 * 4bit transfer mode. On success set the corresponding
+		 * bus width on the host.
+		 */
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_BUS_WIDTH,
+				 ext_csd_bits[idx],
+				 card->ext_csd.generic_cmd6_time);
+		if (err)
+			continue;
+
+		mmc_set_bus_width(card->host, bus_widths[idx]);
+
+		if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
+			err = mmc_compare_ext_csds(card, bus_widths[idx]);
+		else
+			err = mmc_bus_test(card, bus_widths[idx]);
+		if (!err)
+			break;
+	}
+
+	/* switch to HS200 mode if bus width set successfully */
+	if (!err)
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_HS_TIMING, 2, 0);
+err:
+	return err;
+}
+
 /*
  * Handle the detection and initialisation of a card.
  *
@@ -905,11 +999,15 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	/*
 	 * Activate high speed (if supported)
 	 */
-	if ((card->ext_csd.hs_max_dtr != 0) &&
-		(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
-		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-				 EXT_CSD_HS_TIMING, 1,
-				 card->ext_csd.generic_cmd6_time);
+	if (card->ext_csd.hs_max_dtr != 0) {
+		err = 0;
+		if (card->ext_csd.hs_max_dtr > 52000000 &&
+		    host->caps2 & MMC_CAP2_HS200)
+			err = mmc_select_hs200(card);
+		else if	(host->caps & MMC_CAP_MMC_HIGHSPEED)
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 EXT_CSD_HS_TIMING, 1, 0);
+
 		if (err && err != -EBADMSG)
 			goto free_card;
 
@@ -918,8 +1016,15 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 			       mmc_hostname(card->host));
 			err = 0;
 		} else {
-			mmc_card_set_highspeed(card);
-			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+			if (card->ext_csd.hs_max_dtr > 52000000 &&
+			    host->caps2 & MMC_CAP2_HS200) {
+				mmc_card_set_hs200(card);
+				mmc_set_timing(card->host,
+					       MMC_TIMING_MMC_HS200);
+			} else {
+				mmc_card_set_highspeed(card);
+				mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+			}
 		}
 	}
 
@@ -944,7 +1049,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	 */
 	max_dtr = (unsigned int)-1;
 
-	if (mmc_card_highspeed(card)) {
+	if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
 		if (max_dtr > card->ext_csd.hs_max_dtr)
 			max_dtr = card->ext_csd.hs_max_dtr;
 	} else if (max_dtr > card->csd.max_dtr) {
@@ -969,10 +1074,49 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 				ddr = MMC_1_2V_DDR_MODE;
 	}
 
+	/*
+	 * Indicate HS200 SDR mode (if supported).
+	 */
+	if (mmc_card_hs200(card)) {
+		u32 ext_csd_bits;
+		u32 bus_width = card->host->ios.bus_width;
+
+		/*
+		 * For devices supporting HS200 mode, the bus width has
+		 * to be set before executing the tuning function. If
+		 * set before tuning, then device will respond with CRC
+		 * errors for responses on CMD line. So for HS200 the
+		 * sequence will be
+		 * 1. set bus width 4bit / 8 bit (1 bit not supported)
+		 * 2. switch to HS200 mode
+		 * 3. set the clock to > 52Mhz <=200MHz and
+		 * 4. execute tuning for HS200
+		 */
+		if ((host->caps2 & MMC_CAP2_HS200) &&
+		    card->host->ops->execute_tuning)
+			err = card->host->ops->execute_tuning(card->host,
+				MMC_SEND_TUNING_BLOCK_HS200);
+		if (err) {
+			pr_warning("%s: tuning execution failed\n",
+				   mmc_hostname(card->host));
+			goto err;
+		}
+
+		ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
+				EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
+		err = mmc_select_powerclass(card, ext_csd_bits, ext_csd);
+		if (err) {
+			pr_err("%s: power class selection to bus width %d failed\n",
+				mmc_hostname(card->host), 1 << bus_width);
+			goto err;
+		}
+	}
+
 	/*
 	 * Activate wide bus and DDR (if supported).
 	 */
-	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
+	if (!mmc_card_hs200(card) &&
+	    (card->csd.mmca_vsn >= CSD_SPEC_VER_3) &&
 	    (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
 		static unsigned ext_csd_bits[][2] = {
 			{ EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 6f27d35081b8..c63ad03c29c7 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -661,7 +661,8 @@ static int mmc_sd_init_uhs_card(struct mmc_card *card)
 
 	/* SPI mode doesn't define CMD19 */
 	if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning)
-		err = card->host->ops->execute_tuning(card->host);
+		err = card->host->ops->execute_tuning(card->host,
+						      MMC_SEND_TUNING_BLOCK);
 
 out:
 	kfree(status);
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index b77f770ce5d1..bd7bacc950dc 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -14,6 +14,7 @@
 
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
 #include <linux/mmc/sdio_func.h>
 #include <linux/mmc/sdio_ids.h>
@@ -556,7 +557,8 @@ static int mmc_sdio_init_uhs_card(struct mmc_card *card)
 
 	/* Initialize and start re-tuning timer */
 	if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning)
-		err = card->host->ops->execute_tuning(card->host);
+		err = card->host->ops->execute_tuning(card->host,
+						      MMC_SEND_TUNING_BLOCK);
 
 out:
 
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 9478a6bf1bb1..9f22ba572de0 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -216,6 +216,7 @@ struct mmc_card {
 #define MMC_STATE_ULTRAHIGHSPEED (1<<5)		/* card is in ultra high speed mode */
 #define MMC_CARD_SDXC		(1<<6)		/* card is SDXC */
 #define MMC_CARD_REMOVED	(1<<7)		/* card has been removed */
+#define MMC_STATE_HIGHSPEED_200	(1<<8)		/* card is in HS200 mode */
 	unsigned int		quirks; 	/* card quirks */
 #define MMC_QUIRK_LENIENT_FN0	(1<<0)		/* allow SDIO FN0 writes outside of the VS CCCR range */
 #define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1)	/* use func->cur_blksize */
@@ -374,6 +375,7 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_card_present(c)	((c)->state & MMC_STATE_PRESENT)
 #define mmc_card_readonly(c)	((c)->state & MMC_STATE_READONLY)
 #define mmc_card_highspeed(c)	((c)->state & MMC_STATE_HIGHSPEED)
+#define mmc_card_hs200(c)	((c)->state & MMC_STATE_HIGHSPEED_200)
 #define mmc_card_blockaddr(c)	((c)->state & MMC_STATE_BLOCKADDR)
 #define mmc_card_ddr_mode(c)	((c)->state & MMC_STATE_HIGHSPEED_DDR)
 #define mmc_card_uhs(c)		((c)->state & MMC_STATE_ULTRAHIGHSPEED)
@@ -384,6 +386,7 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
 #define mmc_card_set_present(c)	((c)->state |= MMC_STATE_PRESENT)
 #define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
 #define mmc_card_set_highspeed(c) ((c)->state |= MMC_STATE_HIGHSPEED)
+#define mmc_card_set_hs200(c)	((c)->state |= MMC_STATE_HIGHSPEED_200)
 #define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR)
 #define mmc_card_set_ddr_mode(c) ((c)->state |= MMC_STATE_HIGHSPEED_DDR)
 #define mmc_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 031d865167a2..dd13e0539092 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -56,10 +56,13 @@ struct mmc_ios {
 #define MMC_TIMING_UHS_SDR50	3
 #define MMC_TIMING_UHS_SDR104	4
 #define MMC_TIMING_UHS_DDR50	5
+#define MMC_TIMING_MMC_HS200	6
 
 #define MMC_SDR_MODE		0
 #define MMC_1_2V_DDR_MODE	1
 #define MMC_1_8V_DDR_MODE	2
+#define MMC_1_2V_SDR_MODE	3
+#define MMC_1_8V_SDR_MODE	4
 
 	unsigned char	signal_voltage;		/* signalling voltage (1.8V or 3.3V) */
 
@@ -148,7 +151,9 @@ struct mmc_host_ops {
 	void	(*init_card)(struct mmc_host *host, struct mmc_card *card);
 
 	int	(*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
-	int	(*execute_tuning)(struct mmc_host *host);
+
+	/* The tuning command opcode value is different for SD and eMMC cards */
+	int	(*execute_tuning)(struct mmc_host *host, u32 opcode);
 	void	(*enable_preset_value)(struct mmc_host *host, bool enable);
 	int	(*select_drive_strength)(unsigned int max_dtr, int host_drv, int card_drv);
 	void	(*hw_reset)(struct mmc_host *host);
@@ -248,6 +253,10 @@ struct mmc_host {
 #define MMC_CAP2_POWEROFF_NOTIFY (1 << 2)	/* Notify poweroff supported */
 #define MMC_CAP2_NO_MULTI_READ	(1 << 3)	/* Multiblock reads don't work */
 #define MMC_CAP2_NO_SLEEP_CMD	(1 << 4)	/* Don't allow sleep command */
+#define MMC_CAP2_HS200_1_8V_SDR	(1 << 5)        /* can support */
+#define MMC_CAP2_HS200_1_2V_SDR	(1 << 6)        /* can support */
+#define MMC_CAP2_HS200		(MMC_CAP2_HS200_1_8V_SDR | \
+				 MMC_CAP2_HS200_1_2V_SDR)
 
 	mmc_pm_flag_t		pm_caps;	/* supported pm features */
 	unsigned int        power_notify_type;
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 665548e639e8..fb9f6e116e1c 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -51,6 +51,7 @@
 #define MMC_READ_SINGLE_BLOCK    17   /* adtc [31:0] data addr   R1  */
 #define MMC_READ_MULTIPLE_BLOCK  18   /* adtc [31:0] data addr   R1  */
 #define MMC_SEND_TUNING_BLOCK    19   /* adtc                    R1  */
+#define MMC_SEND_TUNING_BLOCK_HS200	21	/* adtc R1  */
 
   /* class 3 */
 #define MMC_WRITE_DAT_UNTIL_STOP 20   /* adtc [31:0] data addr   R1  */
@@ -339,13 +340,76 @@ struct _mmc_csd {
 
 #define EXT_CSD_CARD_TYPE_26	(1<<0)	/* Card can run at 26MHz */
 #define EXT_CSD_CARD_TYPE_52	(1<<1)	/* Card can run at 52MHz */
-#define EXT_CSD_CARD_TYPE_MASK	0xF	/* Mask out reserved bits */
+#define EXT_CSD_CARD_TYPE_MASK	0x3F	/* Mask out reserved bits */
 #define EXT_CSD_CARD_TYPE_DDR_1_8V  (1<<2)   /* Card can run at 52MHz */
 					     /* DDR mode @1.8V or 3V I/O */
 #define EXT_CSD_CARD_TYPE_DDR_1_2V  (1<<3)   /* Card can run at 52MHz */
 					     /* DDR mode @1.2V I/O */
 #define EXT_CSD_CARD_TYPE_DDR_52       (EXT_CSD_CARD_TYPE_DDR_1_8V  \
 					| EXT_CSD_CARD_TYPE_DDR_1_2V)
+#define EXT_CSD_CARD_TYPE_SDR_1_8V	(1<<4)	/* Card can run at 200MHz */
+#define EXT_CSD_CARD_TYPE_SDR_1_2V	(1<<5)	/* Card can run at 200MHz */
+						/* SDR mode @1.2V I/O */
+
+#define EXT_CSD_CARD_TYPE_SDR_200	(EXT_CSD_CARD_TYPE_SDR_1_8V | \
+					 EXT_CSD_CARD_TYPE_SDR_1_2V)
+
+#define EXT_CSD_CARD_TYPE_SDR_ALL	(EXT_CSD_CARD_TYPE_SDR_200 | \
+					 EXT_CSD_CARD_TYPE_52 | \
+					 EXT_CSD_CARD_TYPE_26)
+
+#define	EXT_CSD_CARD_TYPE_SDR_1_2V_ALL	(EXT_CSD_CARD_TYPE_SDR_1_2V | \
+					 EXT_CSD_CARD_TYPE_52 | \
+					 EXT_CSD_CARD_TYPE_26)
+
+#define	EXT_CSD_CARD_TYPE_SDR_1_8V_ALL	(EXT_CSD_CARD_TYPE_SDR_1_8V | \
+					 EXT_CSD_CARD_TYPE_52 | \
+					 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_8V	(EXT_CSD_CARD_TYPE_SDR_1_2V | \
+						 EXT_CSD_CARD_TYPE_DDR_1_8V | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_8V	(EXT_CSD_CARD_TYPE_SDR_1_8V | \
+						 EXT_CSD_CARD_TYPE_DDR_1_8V | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_2V	(EXT_CSD_CARD_TYPE_SDR_1_2V | \
+						 EXT_CSD_CARD_TYPE_DDR_1_2V | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_2V	(EXT_CSD_CARD_TYPE_SDR_1_8V | \
+						 EXT_CSD_CARD_TYPE_DDR_1_2V | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_52	(EXT_CSD_CARD_TYPE_SDR_1_2V | \
+						 EXT_CSD_CARD_TYPE_DDR_52 | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_52	(EXT_CSD_CARD_TYPE_SDR_1_8V | \
+						 EXT_CSD_CARD_TYPE_DDR_52 | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_8V	(EXT_CSD_CARD_TYPE_SDR_200 | \
+						 EXT_CSD_CARD_TYPE_DDR_1_8V | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_2V	(EXT_CSD_CARD_TYPE_SDR_200 | \
+						 EXT_CSD_CARD_TYPE_DDR_1_2V | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
+
+#define EXT_CSD_CARD_TYPE_SDR_ALL_DDR_52	(EXT_CSD_CARD_TYPE_SDR_200 | \
+						 EXT_CSD_CARD_TYPE_DDR_52 | \
+						 EXT_CSD_CARD_TYPE_52 | \
+						 EXT_CSD_CARD_TYPE_26)
 
 #define EXT_CSD_BUS_WIDTH_1	0	/* Card is in 1 bit mode */
 #define EXT_CSD_BUS_WIDTH_4	1	/* Card is in 4 bit mode */
-- 
cgit v1.2.3


From 069c9f142822d552ec885572945d8bce9eff0519 Mon Sep 17 00:00:00 2001
From: Girish K S <girish.shivananjappa@linaro.org>
Date: Fri, 6 Jan 2012 09:56:39 +0530
Subject: mmc: host: Adds support for eMMC 4.5 HS200 mode

This patch adds support for the HS200 mode on the host side.
Also enables the tuning feature required when the HS200 mode
is selected.

Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c  | 57 ++++++++++++++++++++++++++++++++++-------------
 drivers/mmc/host/sdhci.h  |  1 +
 include/linux/mmc/sdhci.h |  1 +
 3 files changed, 44 insertions(+), 15 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0636e9a587b1..96f4e548ba22 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -49,7 +49,7 @@ static void sdhci_finish_data(struct sdhci_host *);
 
 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
 static void sdhci_finish_command(struct sdhci_host *);
-static int sdhci_execute_tuning(struct mmc_host *mmc);
+static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode);
 static void sdhci_tuning_timer(unsigned long data);
 
 #ifdef CONFIG_PM_RUNTIME
@@ -1014,7 +1014,8 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 		flags |= SDHCI_CMD_INDEX;
 
 	/* CMD19 is special in that the Data Present Select should be set */
-	if (cmd->data || (cmd->opcode == MMC_SEND_TUNING_BLOCK))
+	if (cmd->data || cmd->opcode == MMC_SEND_TUNING_BLOCK ||
+	    cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200)
 		flags |= SDHCI_CMD_DATA;
 
 	sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
@@ -1287,7 +1288,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 		if ((host->flags & SDHCI_NEEDS_RETUNING) &&
 		    !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) {
 			spin_unlock_irqrestore(&host->lock, flags);
-			sdhci_execute_tuning(mmc);
+			sdhci_execute_tuning(mmc, mrq->cmd->opcode);
 			spin_lock_irqsave(&host->lock, flags);
 
 			/* Restore original mmc_request structure */
@@ -1382,7 +1383,8 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
 		unsigned int clock;
 
 		/* In case of UHS-I modes, set High Speed Enable */
-		if ((ios->timing == MMC_TIMING_UHS_SDR50) ||
+		if ((ios->timing == MMC_TIMING_MMC_HS200) ||
+		    (ios->timing == MMC_TIMING_UHS_SDR50) ||
 		    (ios->timing == MMC_TIMING_UHS_SDR104) ||
 		    (ios->timing == MMC_TIMING_UHS_DDR50) ||
 		    (ios->timing == MMC_TIMING_UHS_SDR25))
@@ -1435,7 +1437,9 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
 			ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 			/* Select Bus Speed Mode for host */
 			ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
-			if (ios->timing == MMC_TIMING_UHS_SDR12)
+			if (ios->timing == MMC_TIMING_MMC_HS200)
+				ctrl_2 |= SDHCI_CTRL_HS_SDR200;
+			else if (ios->timing == MMC_TIMING_UHS_SDR12)
 				ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
 			else if (ios->timing == MMC_TIMING_UHS_SDR25)
 				ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
@@ -1682,7 +1686,7 @@ static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
 	return err;
 }
 
-static int sdhci_execute_tuning(struct mmc_host *mmc)
+static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 {
 	struct sdhci_host *host;
 	u16 ctrl;
@@ -1690,6 +1694,7 @@ static int sdhci_execute_tuning(struct mmc_host *mmc)
 	int tuning_loop_counter = MAX_TUNING_LOOP;
 	unsigned long timeout;
 	int err = 0;
+	bool requires_tuning_nonuhs = false;
 
 	host = mmc_priv(mmc);
 
@@ -1700,13 +1705,19 @@ static int sdhci_execute_tuning(struct mmc_host *mmc)
 	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 
 	/*
-	 * Host Controller needs tuning only in case of SDR104 mode
-	 * and for SDR50 mode when Use Tuning for SDR50 is set in
+	 * The Host Controller needs tuning only in case of SDR104 mode
+	 * and for SDR50 mode when Use Tuning for SDR50 is set in the
 	 * Capabilities register.
+	 * If the Host Controller supports the HS200 mode then the
+	 * tuning function has to be executed.
 	 */
+	if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) &&
+	    (host->flags & SDHCI_SDR50_NEEDS_TUNING ||
+	     host->flags & SDHCI_HS200_NEEDS_TUNING))
+		requires_tuning_nonuhs = true;
+
 	if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) ||
-	    (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) &&
-	    (host->flags & SDHCI_SDR50_NEEDS_TUNING)))
+	    requires_tuning_nonuhs)
 		ctrl |= SDHCI_CTRL_EXEC_TUNING;
 	else {
 		spin_unlock(&host->lock);
@@ -1742,7 +1753,7 @@ static int sdhci_execute_tuning(struct mmc_host *mmc)
 		if (!tuning_loop_counter && !timeout)
 			break;
 
-		cmd.opcode = MMC_SEND_TUNING_BLOCK;
+		cmd.opcode = opcode;
 		cmd.arg = 0;
 		cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
 		cmd.retries = 0;
@@ -1757,7 +1768,17 @@ static int sdhci_execute_tuning(struct mmc_host *mmc)
 		 * block to the Host Controller. So we set the block size
 		 * to 64 here.
 		 */
-		sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), SDHCI_BLOCK_SIZE);
+		if (cmd.opcode == MMC_SEND_TUNING_BLOCK_HS200) {
+			if (mmc->ios.bus_width == MMC_BUS_WIDTH_8)
+				sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 128),
+					     SDHCI_BLOCK_SIZE);
+			else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4)
+				sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64),
+					     SDHCI_BLOCK_SIZE);
+		} else {
+			sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64),
+				     SDHCI_BLOCK_SIZE);
+		}
 
 		/*
 		 * The tuning block is sent by the card to the host controller.
@@ -2140,12 +2161,14 @@ static void sdhci_show_adma_error(struct sdhci_host *host) { }
 
 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 {
+	u32 command;
 	BUG_ON(intmask == 0);
 
 	/* CMD19 generates _only_ Buffer Read Ready interrupt */
 	if (intmask & SDHCI_INT_DATA_AVAIL) {
-		if (SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) ==
-		    MMC_SEND_TUNING_BLOCK) {
+		command = SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND));
+		if (command == MMC_SEND_TUNING_BLOCK ||
+		    command == MMC_SEND_TUNING_BLOCK_HS200) {
 			host->tuning_done = 1;
 			wake_up(&host->buf_ready_int);
 			return;
@@ -2747,10 +2770,14 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (caps[1] & SDHCI_SUPPORT_DDR50)
 		mmc->caps |= MMC_CAP_UHS_DDR50;
 
-	/* Does the host needs tuning for SDR50? */
+	/* Does the host need tuning for SDR50? */
 	if (caps[1] & SDHCI_USE_SDR50_TUNING)
 		host->flags |= SDHCI_SDR50_NEEDS_TUNING;
 
+	/* Does the host need tuning for HS200? */
+	if (mmc->caps2 & MMC_CAP2_HS200)
+		host->flags |= SDHCI_HS200_NEEDS_TUNING;
+
 	/* Driver Type(s) (A, C, D) supported by the host */
 	if (caps[1] & SDHCI_DRIVER_TYPE_A)
 		mmc->caps |= MMC_CAP_DRIVER_TYPE_A;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index a04d4d0c6fd2..ad265b96b75b 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -158,6 +158,7 @@
 #define   SDHCI_CTRL_UHS_SDR50		0x0002
 #define   SDHCI_CTRL_UHS_SDR104		0x0003
 #define   SDHCI_CTRL_UHS_DDR50		0x0004
+#define   SDHCI_CTRL_HS_SDR200		0x0005 /* reserved value in SDIO spec */
 #define  SDHCI_CTRL_VDD_180		0x0008
 #define  SDHCI_CTRL_DRV_TYPE_MASK	0x0030
 #define   SDHCI_CTRL_DRV_TYPE_B		0x0000
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index dad7a469f09c..c750f85177d9 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -119,6 +119,7 @@ struct sdhci_host {
 #define SDHCI_AUTO_CMD23	(1<<7)	/* Auto CMD23 support */
 #define SDHCI_PV_ENABLED	(1<<8)	/* Preset value enabled */
 #define SDHCI_SDIO_IRQ_ENABLED	(1<<9)	/* SDIO irq enabled */
+#define SDHCI_HS200_NEEDS_TUNING (1<<10)	/* HS200 needs tuning */
 
 	unsigned int version;	/* SDHCI spec. version */
 
-- 
cgit v1.2.3


From 8234e86960b07f5a3cf9973de3f9ba9a50450464 Mon Sep 17 00:00:00 2001
From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Wed, 11 Jan 2012 09:28:21 +0000
Subject: mmc: dw_mmc: miscaculated the fifo-depth with wrong bit operation

In FIFOTH register, the RX_WMark field (bits[27:16]) defaults to
FIFO_DEPTH - 1. When reading it, bits[26:16] were being used, so
fix it to use the mask 0xfff instead of 0x7ff.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/dw_mmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 94e223825a45..0e342793ff14 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1949,7 +1949,7 @@ static int dw_mci_probe(struct platform_device *pdev)
 		 * should put it in the platform data.
 		 */
 		fifo_size = mci_readl(host, FIFOTH);
-		fifo_size = 1 + ((fifo_size >> 16) & 0x7ff);
+		fifo_size = 1 + ((fifo_size >> 16) & 0xfff);
 	} else {
 		fifo_size = host->pdata->fifo_depth;
 	}
-- 
cgit v1.2.3


From 3abc1e804253add41990cbe1461e79c1165108e0 Mon Sep 17 00:00:00 2001
From: Shaohui Xie <Shaohui.Xie@freescale.com>
Date: Thu, 29 Dec 2011 16:33:00 +0800
Subject: mmc: sdhci: restore the enabled dma when do reset all

If dma is enabled, it'll be cleared when reset all is performed, this can
be observed on some platforms, such as P2041 which has a version 2.3
controller, but platform like P4080 which has a version 2.2 controller,
does not suffer this, so we will check if the dma is enabled, we should
restore it after reset all.

Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/host/sdhci.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'drivers')

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 96f4e548ba22..8d66706824a6 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -212,6 +212,11 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
 
 	if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
 		sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier);
+
+	if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
+		if ((host->ops->enable_dma) && (mask & SDHCI_RESET_ALL))
+			host->ops->enable_dma(host);
+	}
 }
 
 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
-- 
cgit v1.2.3


From 0db13fc2abbb0b1a8d8efee20dfbd7f3c5d54022 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Wed, 4 Jan 2012 15:28:45 +0100
Subject: mmc: fix a deadlock between system suspend and MMC block IO

Performing MMC block IO with simultaneous STR can lead to a deadlock: the
mmc_pm_notify() function claims the host and then calls bus .remove()
method, which lands in mmc_blk_remove(), which calls mmc_blk_remove_req()
then it goes to -> mmc_cleanup_queue() -> kthread_stop(), which waits for
the mmc-block thread to stop. If the mmc-block thread at that time is
processing block requests, it will also try to claim the host in
mmc_blk_issue_rq() and block there. This patch fixes the problem by
calling .remove() before claiming the host.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
 drivers/mmc/core/core.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'drivers')

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 1da45e051328..bec0bf21c879 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2175,6 +2175,7 @@ void mmc_stop_host(struct mmc_host *host)
 
 	mmc_bus_get(host);
 	if (host->bus_ops && !host->bus_dead) {
+		/* Calling bus_ops->remove() with a claimed host can deadlock */
 		if (host->bus_ops->remove)
 			host->bus_ops->remove(host);
 
@@ -2398,7 +2399,9 @@ int mmc_suspend_host(struct mmc_host *host)
 			if (err == -ENOSYS || !host->bus_ops->resume) {
 				/*
 				 * We simply "remove" the card in this case.
-				 * It will be redetected on resume.
+				 * It will be redetected on resume.  (Calling
+				 * bus_ops->remove() with a claimed host can
+				 * deadlock.)
 				 */
 				if (host->bus_ops->remove)
 					host->bus_ops->remove(host);
@@ -2491,11 +2494,11 @@ int mmc_pm_notify(struct notifier_block *notify_block,
 		if (!host->bus_ops || host->bus_ops->suspend)
 			break;
 
-		mmc_claim_host(host);
-
+		/* Calling bus_ops->remove() with a claimed host can deadlock */
 		if (host->bus_ops->remove)
 			host->bus_ops->remove(host);
 
+		mmc_claim_host(host);
 		mmc_detach_bus(host);
 		mmc_power_off(host);
 		mmc_release_host(host);
-- 
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