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-rw-r--r--drivers/spi/Kconfig19
-rw-r--r--drivers/spi/Makefile3
-rw-r--r--drivers/spi/amba-pl022.c73
-rw-r--r--drivers/spi/davinci_spi.c43
-rw-r--r--drivers/spi/omap2_mcspi.c38
-rw-r--r--drivers/spi/spi_altera.c339
-rw-r--r--drivers/spi/spi_bfin5xx.c104
-rw-r--r--drivers/spi/spi_bitbang.c13
-rw-r--r--drivers/spi/spi_imx.c12
-rw-r--r--drivers/spi/spi_oc_tiny.c425
-rw-r--r--drivers/spi/spi_sh.c543
-rw-r--r--drivers/spi/spi_sh_msiof.c127
-rw-r--r--drivers/spi/spidev.c12
13 files changed, 1612 insertions, 139 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index bb233a9cbad2..cdeb01f45bc2 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -53,6 +53,12 @@ if SPI_MASTER
comment "SPI Master Controller Drivers"
+config SPI_ALTERA
+ tristate "Altera SPI Controller"
+ select SPI_BITBANG
+ help
+ This is the driver for the Altera SPI Controller.
+
config SPI_ATH79
tristate "Atheros AR71XX/AR724X/AR913X SPI controller driver"
depends on ATH79 && GENERIC_GPIO
@@ -231,6 +237,13 @@ config SPI_FSL_ESPI
From MPC8536, 85xx platform uses the controller, and all P10xx,
P20xx, P30xx,P40xx, P50xx uses this controller.
+config SPI_OC_TINY
+ tristate "OpenCores tiny SPI"
+ depends on GENERIC_GPIO
+ select SPI_BITBANG
+ help
+ This is the driver for OpenCores tiny SPI master controller.
+
config SPI_OMAP_UWIRE
tristate "OMAP1 MicroWire"
depends on ARCH_OMAP1
@@ -330,6 +343,12 @@ config SPI_SH_MSIOF
help
SPI driver for SuperH MSIOF blocks.
+config SPI_SH
+ tristate "SuperH SPI controller"
+ depends on SUPERH
+ help
+ SPI driver for SuperH SPI blocks.
+
config SPI_SH_SCI
tristate "SuperH SCI SPI controller"
depends on SUPERH
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index 86d1b5f9bbd9..8b5a315045a6 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -9,6 +9,7 @@ ccflags-$(CONFIG_SPI_DEBUG) := -DDEBUG
obj-$(CONFIG_SPI_MASTER) += spi.o
# SPI master controller drivers (bus)
+obj-$(CONFIG_SPI_ALTERA) += spi_altera.o
obj-$(CONFIG_SPI_ATMEL) += atmel_spi.o
obj-$(CONFIG_SPI_ATH79) += ath79_spi.o
obj-$(CONFIG_SPI_BFIN) += spi_bfin5xx.o
@@ -27,6 +28,7 @@ obj-$(CONFIG_SPI_IMX) += spi_imx.o
obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o
obj-$(CONFIG_SPI_PXA2XX) += pxa2xx_spi.o
obj-$(CONFIG_SPI_PXA2XX_PCI) += pxa2xx_spi_pci.o
+obj-$(CONFIG_SPI_OC_TINY) += spi_oc_tiny.o
obj-$(CONFIG_SPI_OMAP_UWIRE) += omap_uwire.o
obj-$(CONFIG_SPI_OMAP24XX) += omap2_mcspi.o
obj-$(CONFIG_SPI_OMAP_100K) += omap_spi_100k.o
@@ -46,6 +48,7 @@ obj-$(CONFIG_SPI_TEGRA) += spi_tegra.o
obj-$(CONFIG_SPI_TOPCLIFF_PCH) += spi_topcliff_pch.o
obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
+obj-$(CONFIG_SPI_SH) += spi_sh.o
obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o
obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_msiof.o
obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c
index 71a1219a995d..14a451b2ad63 100644
--- a/drivers/spi/amba-pl022.c
+++ b/drivers/spi/amba-pl022.c
@@ -329,15 +329,16 @@ struct vendor_data {
/**
* struct pl022 - This is the private SSP driver data structure
* @adev: AMBA device model hookup
- * @vendor: Vendor data for the IP block
- * @phybase: The physical memory where the SSP device resides
- * @virtbase: The virtual memory where the SSP is mapped
+ * @vendor: vendor data for the IP block
+ * @phybase: the physical memory where the SSP device resides
+ * @virtbase: the virtual memory where the SSP is mapped
+ * @clk: outgoing clock "SPICLK" for the SPI bus
* @master: SPI framework hookup
* @master_info: controller-specific data from machine setup
- * @regs: SSP controller register's virtual address
- * @pump_messages: Work struct for scheduling work to the workqueue
- * @lock: spinlock to syncronise access to driver data
* @workqueue: a workqueue on which any spi_message request is queued
+ * @pump_messages: work struct for scheduling work to the workqueue
+ * @queue_lock: spinlock to syncronise access to message queue
+ * @queue: message queue
* @busy: workqueue is busy
* @running: workqueue is running
* @pump_transfers: Tasklet used in Interrupt Transfer mode
@@ -348,8 +349,14 @@ struct vendor_data {
* @tx_end: end position in TX buffer to be read
* @rx: current position in RX buffer to be written
* @rx_end: end position in RX buffer to be written
- * @readingtype: the type of read currently going on
- * @writingtype: the type or write currently going on
+ * @read: the type of read currently going on
+ * @write: the type of write currently going on
+ * @exp_fifo_level: expected FIFO level
+ * @dma_rx_channel: optional channel for RX DMA
+ * @dma_tx_channel: optional channel for TX DMA
+ * @sgt_rx: scattertable for the RX transfer
+ * @sgt_tx: scattertable for the TX transfer
+ * @dummypage: a dummy page used for driving data on the bus with DMA
*/
struct pl022 {
struct amba_device *adev;
@@ -397,8 +404,8 @@ struct pl022 {
* @cpsr: Value of Clock prescale register
* @n_bytes: how many bytes(power of 2) reqd for a given data width of client
* @enable_dma: Whether to enable DMA or not
- * @write: function ptr to be used to write when doing xfer for this chip
* @read: function ptr to be used to read when doing xfer for this chip
+ * @write: function ptr to be used to write when doing xfer for this chip
* @cs_control: chip select callback provided by chip
* @xfer_type: polling/interrupt/DMA
*
@@ -508,9 +515,10 @@ static void giveback(struct pl022 *pl022)
msg->state = NULL;
if (msg->complete)
msg->complete(msg->context);
- /* This message is completed, so let's turn off the clocks! */
+ /* This message is completed, so let's turn off the clocks & power */
clk_disable(pl022->clk);
amba_pclk_disable(pl022->adev);
+ amba_vcore_disable(pl022->adev);
}
/**
@@ -917,7 +925,6 @@ static int configure_dma(struct pl022 *pl022)
struct dma_chan *txchan = pl022->dma_tx_channel;
struct dma_async_tx_descriptor *rxdesc;
struct dma_async_tx_descriptor *txdesc;
- dma_cookie_t cookie;
/* Check that the channels are available */
if (!rxchan || !txchan)
@@ -962,10 +969,8 @@ static int configure_dma(struct pl022 *pl022)
tx_conf.dst_addr_width = rx_conf.src_addr_width;
BUG_ON(rx_conf.src_addr_width != tx_conf.dst_addr_width);
- rxchan->device->device_control(rxchan, DMA_SLAVE_CONFIG,
- (unsigned long) &rx_conf);
- txchan->device->device_control(txchan, DMA_SLAVE_CONFIG,
- (unsigned long) &tx_conf);
+ dmaengine_slave_config(rxchan, &rx_conf);
+ dmaengine_slave_config(txchan, &tx_conf);
/* Create sglists for the transfers */
pages = (pl022->cur_transfer->len >> PAGE_SHIFT) + 1;
@@ -1018,23 +1023,17 @@ static int configure_dma(struct pl022 *pl022)
rxdesc->callback_param = pl022;
/* Submit and fire RX and TX with TX last so we're ready to read! */
- cookie = rxdesc->tx_submit(rxdesc);
- if (dma_submit_error(cookie))
- goto err_submit_rx;
- cookie = txdesc->tx_submit(txdesc);
- if (dma_submit_error(cookie))
- goto err_submit_tx;
- rxchan->device->device_issue_pending(rxchan);
- txchan->device->device_issue_pending(txchan);
+ dmaengine_submit(rxdesc);
+ dmaengine_submit(txdesc);
+ dma_async_issue_pending(rxchan);
+ dma_async_issue_pending(txchan);
return 0;
-err_submit_tx:
-err_submit_rx:
err_txdesc:
- txchan->device->device_control(txchan, DMA_TERMINATE_ALL, 0);
+ dmaengine_terminate_all(txchan);
err_rxdesc:
- rxchan->device->device_control(rxchan, DMA_TERMINATE_ALL, 0);
+ dmaengine_terminate_all(rxchan);
dma_unmap_sg(txchan->device->dev, pl022->sgt_tx.sgl,
pl022->sgt_tx.nents, DMA_TO_DEVICE);
err_tx_sgmap:
@@ -1101,8 +1100,8 @@ static void terminate_dma(struct pl022 *pl022)
struct dma_chan *rxchan = pl022->dma_rx_channel;
struct dma_chan *txchan = pl022->dma_tx_channel;
- rxchan->device->device_control(rxchan, DMA_TERMINATE_ALL, 0);
- txchan->device->device_control(txchan, DMA_TERMINATE_ALL, 0);
+ dmaengine_terminate_all(rxchan);
+ dmaengine_terminate_all(txchan);
unmap_free_dma_scatter(pl022);
}
@@ -1482,9 +1481,11 @@ static void pump_messages(struct work_struct *work)
/* Setup the SPI using the per chip configuration */
pl022->cur_chip = spi_get_ctldata(pl022->cur_msg->spi);
/*
- * We enable the clocks here, then the clocks will be disabled when
- * giveback() is called in each method (poll/interrupt/DMA)
+ * We enable the core voltage and clocks here, then the clocks
+ * and core will be disabled when giveback() is called in each method
+ * (poll/interrupt/DMA)
*/
+ amba_vcore_enable(pl022->adev);
amba_pclk_enable(pl022->adev);
clk_enable(pl022->clk);
restore_state(pl022);
@@ -1910,8 +1911,6 @@ static int pl022_setup(struct spi_device *spi)
&& ((pl022->master_info)->enable_dma)) {
chip->enable_dma = true;
dev_dbg(&spi->dev, "DMA mode set in controller state\n");
- if (status < 0)
- goto err_config_params;
SSP_WRITE_BITS(chip->dmacr, SSP_DMA_ENABLED,
SSP_DMACR_MASK_RXDMAE, 0);
SSP_WRITE_BITS(chip->dmacr, SSP_DMA_ENABLED,
@@ -2130,8 +2129,12 @@ pl022_probe(struct amba_device *adev, struct amba_id *id)
goto err_spi_register;
}
dev_dbg(dev, "probe succeded\n");
- /* Disable the silicon block pclk and clock it when needed */
+ /*
+ * Disable the silicon block pclk and any voltage domain and just
+ * power it up and clock it when it's needed
+ */
amba_pclk_disable(adev);
+ amba_vcore_disable(adev);
return 0;
err_spi_register:
@@ -2196,9 +2199,11 @@ static int pl022_suspend(struct amba_device *adev, pm_message_t state)
return status;
}
+ amba_vcore_enable(adev);
amba_pclk_enable(adev);
load_ssp_default_config(pl022);
amba_pclk_disable(adev);
+ amba_vcore_disable(adev);
dev_dbg(&adev->dev, "suspended\n");
return 0;
}
diff --git a/drivers/spi/davinci_spi.c b/drivers/spi/davinci_spi.c
index 6beab99bf95b..e90c2d6a84b3 100644
--- a/drivers/spi/davinci_spi.c
+++ b/drivers/spi/davinci_spi.c
@@ -571,6 +571,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
unsigned long tx_reg, rx_reg;
struct edmacc_param param;
void *rx_buf;
+ int b, c;
dma = &dspi->dma;
@@ -591,22 +592,38 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
if (t->tx_buf) {
t->tx_dma = dma_map_single(&spi->dev, (void *)t->tx_buf,
- dspi->wcount, DMA_TO_DEVICE);
+ t->len, DMA_TO_DEVICE);
if (dma_mapping_error(&spi->dev, t->tx_dma)) {
dev_dbg(sdev, "Unable to DMA map %d bytes"
- "TX buffer\n", dspi->wcount);
+ "TX buffer\n", t->len);
return -ENOMEM;
}
}
+ /*
+ * If number of words is greater than 65535, then we need
+ * to configure a 3 dimension transfer. Use the BCNTRLD
+ * feature to allow for transfers that aren't even multiples
+ * of 65535 (or any other possible b size) by first transferring
+ * the remainder amount then grabbing the next N blocks of
+ * 65535 words.
+ */
+
+ c = dspi->wcount / (SZ_64K - 1); /* N 65535 Blocks */
+ b = dspi->wcount - c * (SZ_64K - 1); /* Remainder */
+ if (b)
+ c++;
+ else
+ b = SZ_64K - 1;
+
param.opt = TCINTEN | EDMA_TCC(dma->tx_channel);
param.src = t->tx_buf ? t->tx_dma : tx_reg;
- param.a_b_cnt = dspi->wcount << 16 | data_type;
+ param.a_b_cnt = b << 16 | data_type;
param.dst = tx_reg;
param.src_dst_bidx = t->tx_buf ? data_type : 0;
- param.link_bcntrld = 0xffff;
- param.src_dst_cidx = 0;
- param.ccnt = 1;
+ param.link_bcntrld = 0xffffffff;
+ param.src_dst_cidx = t->tx_buf ? data_type : 0;
+ param.ccnt = c;
edma_write_slot(dma->tx_channel, &param);
edma_link(dma->tx_channel, dma->dummy_param_slot);
@@ -624,7 +641,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
if (t->rx_buf) {
rx_buf = t->rx_buf;
- rx_buf_count = dspi->rcount;
+ rx_buf_count = t->len;
} else {
rx_buf = dspi->rx_tmp_buf;
rx_buf_count = sizeof(dspi->rx_tmp_buf);
@@ -636,19 +653,19 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
dev_dbg(sdev, "Couldn't DMA map a %d bytes RX buffer\n",
rx_buf_count);
if (t->tx_buf)
- dma_unmap_single(NULL, t->tx_dma, dspi->wcount,
+ dma_unmap_single(NULL, t->tx_dma, t->len,
DMA_TO_DEVICE);
return -ENOMEM;
}
param.opt = TCINTEN | EDMA_TCC(dma->rx_channel);
param.src = rx_reg;
- param.a_b_cnt = dspi->rcount << 16 | data_type;
+ param.a_b_cnt = b << 16 | data_type;
param.dst = t->rx_dma;
param.src_dst_bidx = (t->rx_buf ? data_type : 0) << 16;
- param.link_bcntrld = 0xffff;
- param.src_dst_cidx = 0;
- param.ccnt = 1;
+ param.link_bcntrld = 0xffffffff;
+ param.src_dst_cidx = (t->rx_buf ? data_type : 0) << 16;
+ param.ccnt = c;
edma_write_slot(dma->rx_channel, &param);
if (pdata->cshold_bug)
@@ -675,7 +692,7 @@ static int davinci_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
if (spicfg->io_type == SPI_IO_TYPE_DMA) {
if (t->tx_buf)
- dma_unmap_single(NULL, t->tx_dma, dspi->wcount,
+ dma_unmap_single(NULL, t->tx_dma, t->len,
DMA_TO_DEVICE);
dma_unmap_single(NULL, t->rx_dma, rx_buf_count,
diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index abb1ffbf3d20..6a982a25b7c3 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -487,6 +487,9 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
rx_reg = base + OMAP2_MCSPI_RX0;
chstat_reg = base + OMAP2_MCSPI_CHSTAT0;
+ if (c < (word_len>>3))
+ return 0;
+
if (word_len <= 8) {
u8 *rx;
const u8 *tx;
@@ -534,7 +537,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
dev_vdbg(&spi->dev, "read-%d %02x\n",
word_len, *(rx - 1));
}
- } while (c);
+ } while (c > (word_len>>3));
} else if (word_len <= 16) {
u16 *rx;
const u16 *tx;
@@ -581,7 +584,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
dev_vdbg(&spi->dev, "read-%d %04x\n",
word_len, *(rx - 1));
}
- } while (c);
+ } while (c > (word_len>>3));
} else if (word_len <= 32) {
u32 *rx;
const u32 *tx;
@@ -628,7 +631,7 @@ omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
dev_vdbg(&spi->dev, "read-%d %08x\n",
word_len, *(rx - 1));
}
- } while (c);
+ } while (c > (word_len>>3));
}
/* for TX_ONLY mode, be sure all words have shifted out */
@@ -651,6 +654,17 @@ out:
return count - c;
}
+static u32 omap2_mcspi_calc_divisor(u32 speed_hz)
+{
+ u32 div;
+
+ for (div = 0; div < 15; div++)
+ if (speed_hz >= (OMAP2_MCSPI_MAX_FREQ >> div))
+ return div;
+
+ return 15;
+}
+
/* called only when no transfer is active to this device */
static int omap2_mcspi_setup_transfer(struct spi_device *spi,
struct spi_transfer *t)
@@ -673,12 +687,8 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi,
if (t && t->speed_hz)
speed_hz = t->speed_hz;
- if (speed_hz) {
- while (div <= 15 && (OMAP2_MCSPI_MAX_FREQ / (1 << div))
- > speed_hz)
- div++;
- } else
- div = 15;
+ speed_hz = min_t(u32, speed_hz, OMAP2_MCSPI_MAX_FREQ);
+ div = omap2_mcspi_calc_divisor(speed_hz);
l = mcspi_cached_chconf0(spi);
@@ -715,7 +725,7 @@ static int omap2_mcspi_setup_transfer(struct spi_device *spi,
mcspi_write_chconf0(spi, l);
dev_dbg(&spi->dev, "setup: speed %d, sample %s edge, clk %s\n",
- OMAP2_MCSPI_MAX_FREQ / (1 << div),
+ OMAP2_MCSPI_MAX_FREQ >> div,
(spi->mode & SPI_CPHA) ? "trailing" : "leading",
(spi->mode & SPI_CPOL) ? "inverted" : "normal");
@@ -1015,10 +1025,10 @@ static int omap2_mcspi_transfer(struct spi_device *spi, struct spi_message *m)
t->bits_per_word);
return -EINVAL;
}
- if (t->speed_hz && t->speed_hz < OMAP2_MCSPI_MAX_FREQ/(1<<16)) {
- dev_dbg(&spi->dev, "%d Hz max exceeds %d\n",
- t->speed_hz,
- OMAP2_MCSPI_MAX_FREQ/(1<<16));
+ if (t->speed_hz && t->speed_hz < (OMAP2_MCSPI_MAX_FREQ >> 15)) {
+ dev_dbg(&spi->dev, "speed_hz %d below minimum %d Hz\n",
+ t->speed_hz,
+ OMAP2_MCSPI_MAX_FREQ >> 15);
return -EINVAL;
}
diff --git a/drivers/spi/spi_altera.c b/drivers/spi/spi_altera.c
new file mode 100644
index 000000000000..4813a63ce6fb
--- /dev/null
+++ b/drivers/spi/spi_altera.c
@@ -0,0 +1,339 @@
+/*
+ * Altera SPI driver
+ *
+ * Copyright (C) 2008 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * Based on spi_s3c24xx.c, which is:
+ * Copyright (c) 2006 Ben Dooks
+ * Copyright (c) 2006 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * 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/init.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+#include <linux/io.h>
+#include <linux/of.h>
+
+#define DRV_NAME "spi_altera"
+
+#define ALTERA_SPI_RXDATA 0
+#define ALTERA_SPI_TXDATA 4
+#define ALTERA_SPI_STATUS 8
+#define ALTERA_SPI_CONTROL 12
+#define ALTERA_SPI_SLAVE_SEL 20
+
+#define ALTERA_SPI_STATUS_ROE_MSK 0x8
+#define ALTERA_SPI_STATUS_TOE_MSK 0x10
+#define ALTERA_SPI_STATUS_TMT_MSK 0x20
+#define ALTERA_SPI_STATUS_TRDY_MSK 0x40
+#define ALTERA_SPI_STATUS_RRDY_MSK 0x80
+#define ALTERA_SPI_STATUS_E_MSK 0x100
+
+#define ALTERA_SPI_CONTROL_IROE_MSK 0x8
+#define ALTERA_SPI_CONTROL_ITOE_MSK 0x10
+#define ALTERA_SPI_CONTROL_ITRDY_MSK 0x40
+#define ALTERA_SPI_CONTROL_IRRDY_MSK 0x80
+#define ALTERA_SPI_CONTROL_IE_MSK 0x100
+#define ALTERA_SPI_CONTROL_SSO_MSK 0x400
+
+struct altera_spi {
+ /* bitbang has to be first */
+ struct spi_bitbang bitbang;
+ struct completion done;
+
+ void __iomem *base;
+ int irq;
+ int len;
+ int count;
+ int bytes_per_word;
+ unsigned long imr;
+
+ /* data buffers */
+ const unsigned char *tx;
+ unsigned char *rx;
+};
+
+static inline struct altera_spi *altera_spi_to_hw(struct spi_device *sdev)
+{
+ return spi_master_get_devdata(sdev->master);
+}
+
+static void altera_spi_chipsel(struct spi_device *spi, int value)
+{
+ struct altera_spi *hw = altera_spi_to_hw(spi);
+
+ if (spi->mode & SPI_CS_HIGH) {
+ switch (value) {
+ case BITBANG_CS_INACTIVE:
+ writel(1 << spi->chip_select,
+ hw->base + ALTERA_SPI_SLAVE_SEL);
+ hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
+ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+ break;
+
+ case BITBANG_CS_ACTIVE:
+ hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
+ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+ writel(0, hw->base + ALTERA_SPI_SLAVE_SEL);
+ break;
+ }
+ } else {
+ switch (value) {
+ case BITBANG_CS_INACTIVE:
+ hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
+ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+ break;
+
+ case BITBANG_CS_ACTIVE:
+ writel(1 << spi->chip_select,
+ hw->base + ALTERA_SPI_SLAVE_SEL);
+ hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
+ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+ break;
+ }
+ }
+}
+
+static int altera_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
+{
+ return 0;
+}
+
+static int altera_spi_setup(struct spi_device *spi)
+{
+ return 0;
+}
+
+static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
+{
+ if (hw->tx) {
+ switch (hw->bytes_per_word) {
+ case 1:
+ return hw->tx[count];
+ case 2:
+ return (hw->tx[count * 2]
+ | (hw->tx[count * 2 + 1] << 8));
+ }
+ }
+ return 0;
+}
+
+static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
+{
+ struct altera_spi *hw = altera_spi_to_hw(spi);
+
+ hw->tx = t->tx_buf;
+ hw->rx = t->rx_buf;
+ hw->count = 0;
+ hw->bytes_per_word = (t->bits_per_word ? : spi->bits_per_word) / 8;
+ hw->len = t->len / hw->bytes_per_word;
+
+ if (hw->irq >= 0) {
+ /* enable receive interrupt */
+ hw->imr |= ALTERA_SPI_CONTROL_IRRDY_MSK;
+ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+
+ /* send the first byte */
+ writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA);
+
+ wait_for_completion(&hw->done);
+ /* disable receive interrupt */
+ hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK;
+ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+ } else {
+ /* send the first byte */
+ writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA);
+
+ while (1) {
+ unsigned int rxd;
+
+ while (!(readl(hw->base + ALTERA_SPI_STATUS) &
+ ALTERA_SPI_STATUS_RRDY_MSK))
+ cpu_relax();
+
+ rxd = readl(hw->base + ALTERA_SPI_RXDATA);
+ if (hw->rx) {
+ switch (hw->bytes_per_word) {
+ case 1:
+ hw->rx[hw->count] = rxd;
+ break;
+ case 2:
+ hw->rx[hw->count * 2] = rxd;
+ hw->rx[hw->count * 2 + 1] = rxd >> 8;
+ break;
+ }
+ }
+
+ hw->count++;
+
+ if (hw->count < hw->len)
+ writel(hw_txbyte(hw, hw->count),
+ hw->base + ALTERA_SPI_TXDATA);
+ else
+ break;
+ }
+
+ }
+
+ return hw->count * hw->bytes_per_word;
+}
+
+static irqreturn_t altera_spi_irq(int irq, void *dev)
+{
+ struct altera_spi *hw = dev;
+ unsigned int rxd;
+
+ rxd = readl(hw->base + ALTERA_SPI_RXDATA);
+ if (hw->rx) {
+ switch (hw->bytes_per_word) {
+ case 1:
+ hw->rx[hw->count] = rxd;
+ break;
+ case 2:
+ hw->rx[hw->count * 2] = rxd;
+ hw->rx[hw->count * 2 + 1] = rxd >> 8;
+ break;
+ }
+ }
+
+ hw->count++;
+
+ if (hw->count < hw->len)
+ writel(hw_txbyte(hw, hw->count), hw->base + ALTERA_SPI_TXDATA);
+ else
+ complete(&hw->done);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit altera_spi_probe(struct platform_device *pdev)
+{
+ struct altera_spi_platform_data *platp = pdev->dev.platform_data;
+ struct altera_spi *hw;
+ struct spi_master *master;
+ struct resource *res;
+ int err = -ENODEV;
+
+ master = spi_alloc_master(&pdev->dev, sizeof(struct altera_spi));
+ if (!master)
+ return err;
+
+ /* setup the master state. */
+ master->bus_num = pdev->id;
+ master->num_chipselect = 16;
+ master->mode_bits = SPI_CS_HIGH;
+ master->setup = altera_spi_setup;
+
+ hw = spi_master_get_devdata(master);
+ platform_set_drvdata(pdev, hw);
+
+ /* setup the state for the bitbang driver */
+ hw->bitbang.master = spi_master_get(master);
+ if (!hw->bitbang.master)
+ return err;
+ hw->bitbang.setup_transfer = altera_spi_setupxfer;
+ hw->bitbang.chipselect = altera_spi_chipsel;
+ hw->bitbang.txrx_bufs = altera_spi_txrx;
+
+ /* find and map our resources */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ goto exit_busy;
+ if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
+ pdev->name))
+ goto exit_busy;
+ hw->base = devm_ioremap_nocache(&pdev->dev, res->start,
+ resource_size(res));
+ if (!hw->base)
+ goto exit_busy;
+ /* program defaults into the registers */
+ hw->imr = 0; /* disable spi interrupts */
+ writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
+ writel(0, hw->base + ALTERA_SPI_STATUS); /* clear status reg */
+ if (readl(hw->base + ALTERA_SPI_STATUS) & ALTERA_SPI_STATUS_RRDY_MSK)
+ readl(hw->base + ALTERA_SPI_RXDATA); /* flush rxdata */
+ /* irq is optional */
+ hw->irq = platform_get_irq(pdev, 0);
+ if (hw->irq >= 0) {
+ init_completion(&hw->done);
+ err = devm_request_irq(&pdev->dev, hw->irq, altera_spi_irq, 0,
+ pdev->name, hw);
+ if (err)
+ goto exit;
+ }
+ /* find platform data */
+ if (!platp)
+ hw->bitbang.master->dev.of_node = pdev->dev.of_node;
+
+ /* register our spi controller */
+ err = spi_bitbang_start(&hw->bitbang);
+ if (err)
+ goto exit;
+ dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);
+
+ return 0;
+
+exit_busy:
+ err = -EBUSY;
+exit:
+ platform_set_drvdata(pdev, NULL);
+ spi_master_put(master);
+ return err;
+}
+
+static int __devexit altera_spi_remove(struct platform_device *dev)
+{
+ struct altera_spi *hw = platform_get_drvdata(dev);
+ struct spi_master *master = hw->bitbang.master;
+
+ spi_bitbang_stop(&hw->bitbang);
+ platform_set_drvdata(dev, NULL);
+ spi_master_put(master);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id altera_spi_match[] = {
+ { .compatible = "ALTR,spi-1.0", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, altera_spi_match);
+#else /* CONFIG_OF */
+#define altera_spi_match NULL
+#endif /* CONFIG_OF */
+
+static struct platform_driver altera_spi_driver = {
+ .probe = altera_spi_probe,
+ .remove = __devexit_p(altera_spi_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .pm = NULL,
+ .of_match_table = altera_spi_match,
+ },
+};
+
+static int __init altera_spi_init(void)
+{
+ return platform_driver_register(&altera_spi_driver);
+}
+module_init(altera_spi_init);
+
+static void __exit altera_spi_exit(void)
+{
+ platform_driver_unregister(&altera_spi_driver);
+}
+module_exit(altera_spi_exit);
+
+MODULE_DESCRIPTION("Altera SPI driver");
+MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 3f223511127b..a28462486df8 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -425,6 +425,7 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id)
struct bfin_spi_slave_data *chip = drv_data->cur_chip;
struct spi_message *msg = drv_data->cur_msg;
int n_bytes = drv_data->n_bytes;
+ int loop = 0;
/* wait until transfer finished. */
while (!(read_STAT(drv_data) & BIT_STAT_RXS))
@@ -435,10 +436,15 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id)
/* last read */
if (drv_data->rx) {
dev_dbg(&drv_data->pdev->dev, "last read\n");
- if (n_bytes == 2)
- *(u16 *) (drv_data->rx) = read_RDBR(drv_data);
- else if (n_bytes == 1)
- *(u8 *) (drv_data->rx) = read_RDBR(drv_data);
+ if (n_bytes % 2) {
+ u16 *buf = (u16 *)drv_data->rx;
+ for (loop = 0; loop < n_bytes / 2; loop++)
+ *buf++ = read_RDBR(drv_data);
+ } else {
+ u8 *buf = (u8 *)drv_data->rx;
+ for (loop = 0; loop < n_bytes; loop++)
+ *buf++ = read_RDBR(drv_data);
+ }
drv_data->rx += n_bytes;
}
@@ -458,29 +464,53 @@ static irqreturn_t bfin_spi_pio_irq_handler(int irq, void *dev_id)
if (drv_data->rx && drv_data->tx) {
/* duplex */
dev_dbg(&drv_data->pdev->dev, "duplex: write_TDBR\n");
- if (drv_data->n_bytes == 2) {
- *(u16 *) (drv_data->rx) = read_RDBR(drv_data);
- write_TDBR(drv_data, (*(u16 *) (drv_data->tx)));
- } else if (drv_data->n_bytes == 1) {
- *(u8 *) (drv_data->rx) = read_RDBR(drv_data);
- write_TDBR(drv_data, (*(u8 *) (drv_data->tx)));
+ if (n_bytes % 2) {
+ u16 *buf = (u16 *)drv_data->rx;
+ u16 *buf2 = (u16 *)drv_data->tx;
+ for (loop = 0; loop < n_bytes / 2; loop++) {
+ *buf++ = read_RDBR(drv_data);
+ write_TDBR(drv_data, *buf2++);
+ }
+ } else {
+ u8 *buf = (u8 *)drv_data->rx;
+ u8 *buf2 = (u8 *)drv_data->tx;
+ for (loop = 0; loop < n_bytes; loop++) {
+ *buf++ = read_RDBR(drv_data);
+ write_TDBR(drv_data, *buf2++);
+ }
}
} else if (drv_data->rx) {
/* read */
dev_dbg(&drv_data->pdev->dev, "read: write_TDBR\n");
- if (drv_data->n_bytes == 2)
- *(u16 *) (drv_data->rx) = read_RDBR(drv_data);
- else if (drv_data->n_bytes == 1)
- *(u8 *) (drv_data->rx) = read_RDBR(drv_data);
- write_TDBR(drv_data, chip->idle_tx_val);
+ if (n_bytes % 2) {
+ u16 *buf = (u16 *)drv_data->rx;
+ for (loop = 0; loop < n_bytes / 2; loop++) {
+ *buf++ = read_RDBR(drv_data);
+ write_TDBR(drv_data, chip->idle_tx_val);
+ }
+ } else {
+ u8 *buf = (u8 *)drv_data->rx;
+ for (loop = 0; loop < n_bytes; loop++) {
+ *buf++ = read_RDBR(drv_data);
+ write_TDBR(drv_data, chip->idle_tx_val);
+ }
+ }
} else if (drv_data->tx) {
/* write */
dev_dbg(&drv_data->pdev->dev, "write: write_TDBR\n");
- bfin_spi_dummy_read(drv_data);
- if (drv_data->n_bytes == 2)
- write_TDBR(drv_data, (*(u16 *) (drv_data->tx)));
- else if (drv_data->n_bytes == 1)
- write_TDBR(drv_data, (*(u8 *) (drv_data->tx)));
+ if (n_bytes % 2) {
+ u16 *buf = (u16 *)drv_data->tx;
+ for (loop = 0; loop < n_bytes / 2; loop++) {
+ read_RDBR(drv_data);
+ write_TDBR(drv_data, *buf++);
+ }
+ } else {
+ u8 *buf = (u8 *)drv_data->tx;
+ for (loop = 0; loop < n_bytes; loop++) {
+ read_RDBR(drv_data);
+ write_TDBR(drv_data, *buf++);
+ }
+ }
}
if (drv_data->tx)
@@ -623,6 +653,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
message->state = bfin_spi_next_transfer(drv_data);
/* Schedule next transfer tasklet */
tasklet_schedule(&drv_data->pump_transfers);
+ return;
}
if (transfer->tx_buf != NULL) {
@@ -651,16 +682,16 @@ static void bfin_spi_pump_transfers(unsigned long data)
/* Bits per word setup */
bits_per_word = transfer->bits_per_word ? : message->spi->bits_per_word;
- if (bits_per_word == 8) {
- drv_data->n_bytes = 1;
- drv_data->len = transfer->len;
- cr_width = 0;
- drv_data->ops = &bfin_bfin_spi_transfer_ops_u8;
- } else if (bits_per_word == 16) {
- drv_data->n_bytes = 2;
+ if ((bits_per_word > 0) && (bits_per_word % 16 == 0)) {
+ drv_data->n_bytes = bits_per_word/8;
drv_data->len = (transfer->len) >> 1;
cr_width = BIT_CTL_WORDSIZE;
drv_data->ops = &bfin_bfin_spi_transfer_ops_u16;
+ } else if ((bits_per_word > 0) && (bits_per_word % 8 == 0)) {
+ drv_data->n_bytes = bits_per_word/8;
+ drv_data->len = transfer->len;
+ cr_width = 0;
+ drv_data->ops = &bfin_bfin_spi_transfer_ops_u8;
} else {
dev_err(&drv_data->pdev->dev, "transfer: unsupported bits_per_word\n");
message->status = -EINVAL;
@@ -815,10 +846,19 @@ static void bfin_spi_pump_transfers(unsigned long data)
if (drv_data->tx == NULL)
write_TDBR(drv_data, chip->idle_tx_val);
else {
- if (bits_per_word == 8)
- write_TDBR(drv_data, (*(u8 *) (drv_data->tx)));
- else
- write_TDBR(drv_data, (*(u16 *) (drv_data->tx)));
+ int loop;
+ if (bits_per_word % 16 == 0) {
+ u16 *buf = (u16 *)drv_data->tx;
+ for (loop = 0; loop < bits_per_word / 16;
+ loop++) {
+ write_TDBR(drv_data, *buf++);
+ }
+ } else if (bits_per_word % 8 == 0) {
+ u8 *buf = (u8 *)drv_data->tx;
+ for (loop = 0; loop < bits_per_word / 8; loop++)
+ write_TDBR(drv_data, *buf++);
+ }
+
drv_data->tx += drv_data->n_bytes;
}
@@ -1031,7 +1071,7 @@ static int bfin_spi_setup(struct spi_device *spi)
chip->ctl_reg &= bfin_ctl_reg;
}
- if (spi->bits_per_word != 8 && spi->bits_per_word != 16) {
+ if (spi->bits_per_word % 8) {
dev_err(&spi->dev, "%d bits_per_word is not supported\n",
spi->bits_per_word);
goto error;
diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c
index 8b55724d5f39..14a63f6010d1 100644
--- a/drivers/spi/spi_bitbang.c
+++ b/drivers/spi/spi_bitbang.c
@@ -259,10 +259,6 @@ static void bitbang_work(struct work_struct *work)
struct spi_bitbang *bitbang =
container_of(work, struct spi_bitbang, work);
unsigned long flags;
- int (*setup_transfer)(struct spi_device *,
- struct spi_transfer *);
-
- setup_transfer = bitbang->setup_transfer;
spin_lock_irqsave(&bitbang->lock, flags);
bitbang->busy = 1;
@@ -300,11 +296,7 @@ static void bitbang_work(struct work_struct *work)
/* init (-1) or override (1) transfer params */
if (do_setup != 0) {
- if (!setup_transfer) {
- status = -ENOPROTOOPT;
- break;
- }
- status = setup_transfer(spi, t);
+ status = bitbang->setup_transfer(spi, t);
if (status < 0)
break;
if (do_setup == -1)
@@ -465,6 +457,9 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
}
} else if (!bitbang->master->setup)
return -EINVAL;
+ if (bitbang->master->transfer == spi_bitbang_transfer &&
+ !bitbang->setup_transfer)
+ return -EINVAL;
/* this task is the only thing to touch the SPI bits */
bitbang->busy = 0;
diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c
index 1cf9d5faabf4..69d6dba67c19 100644
--- a/drivers/spi/spi_imx.c
+++ b/drivers/spi/spi_imx.c
@@ -174,7 +174,7 @@ static unsigned int spi_imx_clkdiv_2(unsigned int fin,
#define SPI_IMX2_3_CTRL 0x08
#define SPI_IMX2_3_CTRL_ENABLE (1 << 0)
#define SPI_IMX2_3_CTRL_XCH (1 << 2)
-#define SPI_IMX2_3_CTRL_MODE(cs) (1 << ((cs) + 4))
+#define SPI_IMX2_3_CTRL_MODE_MASK (0xf << 4)
#define SPI_IMX2_3_CTRL_POSTDIV_OFFSET 8
#define SPI_IMX2_3_CTRL_PREDIV_OFFSET 12
#define SPI_IMX2_3_CTRL_CS(cs) ((cs) << 18)
@@ -253,8 +253,14 @@ static int __maybe_unused spi_imx2_3_config(struct spi_imx_data *spi_imx,
{
u32 ctrl = SPI_IMX2_3_CTRL_ENABLE, cfg = 0;
- /* set master mode */
- ctrl |= SPI_IMX2_3_CTRL_MODE(config->cs);
+ /*
+ * The hardware seems to have a race condition when changing modes. The
+ * current assumption is that the selection of the channel arrives
+ * earlier in the hardware than the mode bits when they are written at
+ * the same time.
+ * So set master mode for all channels as we do not support slave mode.
+ */
+ ctrl |= SPI_IMX2_3_CTRL_MODE_MASK;
/* set clock speed */
ctrl |= spi_imx2_3_clkdiv(spi_imx->spi_clk, config->speed_hz);
diff --git a/drivers/spi/spi_oc_tiny.c b/drivers/spi/spi_oc_tiny.c
new file mode 100644
index 000000000000..f1bde66cea19
--- /dev/null
+++ b/drivers/spi/spi_oc_tiny.c
@@ -0,0 +1,425 @@
+/*
+ * OpenCores tiny SPI master driver
+ *
+ * http://opencores.org/project,tiny_spi
+ *
+ * Copyright (C) 2011 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * Based on spi_s3c24xx.c, which is:
+ * Copyright (c) 2006 Ben Dooks
+ * Copyright (c) 2006 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * 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/init.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+#include <linux/spi/spi_oc_tiny.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+
+#define DRV_NAME "spi_oc_tiny"
+
+#define TINY_SPI_RXDATA 0
+#define TINY_SPI_TXDATA 4
+#define TINY_SPI_STATUS 8
+#define TINY_SPI_CONTROL 12
+#define TINY_SPI_BAUD 16
+
+#define TINY_SPI_STATUS_TXE 0x1
+#define TINY_SPI_STATUS_TXR 0x2
+
+struct tiny_spi {
+ /* bitbang has to be first */
+ struct spi_bitbang bitbang;
+ struct completion done;
+
+ void __iomem *base;
+ int irq;
+ unsigned int freq;
+ unsigned int baudwidth;
+ unsigned int baud;
+ unsigned int speed_hz;
+ unsigned int mode;
+ unsigned int len;
+ unsigned int txc, rxc;
+ const u8 *txp;
+ u8 *rxp;
+ unsigned int gpio_cs_count;
+ int *gpio_cs;
+};
+
+static inline struct tiny_spi *tiny_spi_to_hw(struct spi_device *sdev)
+{
+ return spi_master_get_devdata(sdev->master);
+}
+
+static unsigned int tiny_spi_baud(struct spi_device *spi, unsigned int hz)
+{
+ struct tiny_spi *hw = tiny_spi_to_hw(spi);
+
+ return min(DIV_ROUND_UP(hw->freq, hz * 2), (1U << hw->baudwidth)) - 1;
+}
+
+static void tiny_spi_chipselect(struct spi_device *spi, int is_active)
+{
+ struct tiny_spi *hw = tiny_spi_to_hw(spi);
+
+ if (hw->gpio_cs_count) {
+ gpio_set_value(hw->gpio_cs[spi->chip_select],
+ (spi->mode & SPI_CS_HIGH) ? is_active : !is_active);
+ }
+}
+
+static int tiny_spi_setup_transfer(struct spi_device *spi,
+ struct spi_transfer *t)
+{
+ struct tiny_spi *hw = tiny_spi_to_hw(spi);
+ unsigned int baud = hw->baud;
+
+ if (t) {
+ if (t->speed_hz && t->speed_hz != hw->speed_hz)
+ baud = tiny_spi_baud(spi, t->speed_hz);
+ }
+ writel(baud, hw->base + TINY_SPI_BAUD);
+ writel(hw->mode, hw->base + TINY_SPI_CONTROL);
+ return 0;
+}
+
+static int tiny_spi_setup(struct spi_device *spi)
+{
+ struct tiny_spi *hw = tiny_spi_to_hw(spi);
+
+ if (spi->max_speed_hz != hw->speed_hz) {
+ hw->speed_hz = spi->max_speed_hz;
+ hw->baud = tiny_spi_baud(spi, hw->speed_hz);
+ }
+ hw->mode = spi->mode & (SPI_CPOL | SPI_CPHA);
+ return 0;
+}
+
+static inline void tiny_spi_wait_txr(struct tiny_spi *hw)
+{
+ while (!(readb(hw->base + TINY_SPI_STATUS) &
+ TINY_SPI_STATUS_TXR))
+ cpu_relax();
+}
+
+static inline void tiny_spi_wait_txe(struct tiny_spi *hw)
+{
+ while (!(readb(hw->base + TINY_SPI_STATUS) &
+ TINY_SPI_STATUS_TXE))
+ cpu_relax();
+}
+
+static int tiny_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t)
+{
+ struct tiny_spi *hw = tiny_spi_to_hw(spi);
+ const u8 *txp = t->tx_buf;
+ u8 *rxp = t->rx_buf;
+ unsigned int i;
+
+ if (hw->irq >= 0) {
+ /* use intrrupt driven data transfer */
+ hw->len = t->len;
+ hw->txp = t->tx_buf;
+ hw->rxp = t->rx_buf;
+ hw->txc = 0;
+ hw->rxc = 0;
+
+ /* send the first byte */
+ if (t->len > 1) {
+ writeb(hw->txp ? *hw->txp++ : 0,
+ hw->base + TINY_SPI_TXDATA);
+ hw->txc++;
+ writeb(hw->txp ? *hw->txp++ : 0,
+ hw->base + TINY_SPI_TXDATA);
+ hw->txc++;
+ writeb(TINY_SPI_STATUS_TXR, hw->base + TINY_SPI_STATUS);
+ } else {
+ writeb(hw->txp ? *hw->txp++ : 0,
+ hw->base + TINY_SPI_TXDATA);
+ hw->txc++;
+ writeb(TINY_SPI_STATUS_TXE, hw->base + TINY_SPI_STATUS);
+ }
+
+ wait_for_completion(&hw->done);
+ } else if (txp && rxp) {
+ /* we need to tighten the transfer loop */
+ writeb(*txp++, hw->base + TINY_SPI_TXDATA);
+ if (t->len > 1) {
+ writeb(*txp++, hw->base + TINY_SPI_TXDATA);
+ for (i = 2; i < t->len; i++) {
+ u8 rx, tx = *txp++;
+ tiny_spi_wait_txr(hw);
+ rx = readb(hw->base + TINY_SPI_TXDATA);
+ writeb(tx, hw->base + TINY_SPI_TXDATA);
+ *rxp++ = rx;
+ }
+ tiny_spi_wait_txr(hw);
+ *rxp++ = readb(hw->base + TINY_SPI_TXDATA);
+ }
+ tiny_spi_wait_txe(hw);
+ *rxp++ = readb(hw->base + TINY_SPI_RXDATA);
+ } else if (rxp) {
+ writeb(0, hw->base + TINY_SPI_TXDATA);
+ if (t->len > 1) {
+ writeb(0,
+ hw->base + TINY_SPI_TXDATA);
+ for (i = 2; i < t->len; i++) {
+ u8 rx;
+ tiny_spi_wait_txr(hw);
+ rx = readb(hw->base + TINY_SPI_TXDATA);
+ writeb(0, hw->base + TINY_SPI_TXDATA);
+ *rxp++ = rx;
+ }
+ tiny_spi_wait_txr(hw);
+ *rxp++ = readb(hw->base + TINY_SPI_TXDATA);
+ }
+ tiny_spi_wait_txe(hw);
+ *rxp++ = readb(hw->base + TINY_SPI_RXDATA);
+ } else if (txp) {
+ writeb(*txp++, hw->base + TINY_SPI_TXDATA);
+ if (t->len > 1) {
+ writeb(*txp++, hw->base + TINY_SPI_TXDATA);
+ for (i = 2; i < t->len; i++) {
+ u8 tx = *txp++;
+ tiny_spi_wait_txr(hw);
+ writeb(tx, hw->base + TINY_SPI_TXDATA);
+ }
+ }
+ tiny_spi_wait_txe(hw);
+ } else {
+ writeb(0, hw->base + TINY_SPI_TXDATA);
+ if (t->len > 1) {
+ writeb(0, hw->base + TINY_SPI_TXDATA);
+ for (i = 2; i < t->len; i++) {
+ tiny_spi_wait_txr(hw);
+ writeb(0, hw->base + TINY_SPI_TXDATA);
+ }
+ }
+ tiny_spi_wait_txe(hw);
+ }
+ return t->len;
+}
+
+static irqreturn_t tiny_spi_irq(int irq, void *dev)
+{
+ struct tiny_spi *hw = dev;
+
+ writeb(0, hw->base + TINY_SPI_STATUS);
+ if (hw->rxc + 1 == hw->len) {
+ if (hw->rxp)
+ *hw->rxp++ = readb(hw->base + TINY_SPI_RXDATA);
+ hw->rxc++;
+ complete(&hw->done);
+ } else {
+ if (hw->rxp)
+ *hw->rxp++ = readb(hw->base + TINY_SPI_TXDATA);
+ hw->rxc++;
+ if (hw->txc < hw->len) {
+ writeb(hw->txp ? *hw->txp++ : 0,
+ hw->base + TINY_SPI_TXDATA);
+ hw->txc++;
+ writeb(TINY_SPI_STATUS_TXR,
+ hw->base + TINY_SPI_STATUS);
+ } else {
+ writeb(TINY_SPI_STATUS_TXE,
+ hw->base + TINY_SPI_STATUS);
+ }
+ }
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_OF
+#include <linux/of_gpio.h>
+
+static int __devinit tiny_spi_of_probe(struct platform_device *pdev)
+{
+ struct tiny_spi *hw = platform_get_drvdata(pdev);
+ struct device_node *np = pdev->dev.of_node;
+ unsigned int i;
+ const __be32 *val;
+ int len;
+
+ if (!np)
+ return 0;
+ hw->gpio_cs_count = of_gpio_count(np);
+ if (hw->gpio_cs_count) {
+ hw->gpio_cs = devm_kzalloc(&pdev->dev,
+ hw->gpio_cs_count * sizeof(unsigned int),
+ GFP_KERNEL);
+ if (!hw->gpio_cs)
+ return -ENOMEM;
+ }
+ for (i = 0; i < hw->gpio_cs_count; i++) {
+ hw->gpio_cs[i] = of_get_gpio_flags(np, i, NULL);
+ if (hw->gpio_cs[i] < 0)
+ return -ENODEV;
+ }
+ hw->bitbang.master->dev.of_node = pdev->dev.of_node;
+ val = of_get_property(pdev->dev.of_node,
+ "clock-frequency", &len);
+ if (val && len >= sizeof(__be32))
+ hw->freq = be32_to_cpup(val);
+ val = of_get_property(pdev->dev.of_node, "baud-width", &len);
+ if (val && len >= sizeof(__be32))
+ hw->baudwidth = be32_to_cpup(val);
+ return 0;
+}
+#else /* !CONFIG_OF */
+static int __devinit tiny_spi_of_probe(struct platform_device *pdev)
+{
+ return 0;
+}
+#endif /* CONFIG_OF */
+
+static int __devinit tiny_spi_probe(struct platform_device *pdev)
+{
+ struct tiny_spi_platform_data *platp = pdev->dev.platform_data;
+ struct tiny_spi *hw;
+ struct spi_master *master;
+ struct resource *res;
+ unsigned int i;
+ int err = -ENODEV;
+
+ master = spi_alloc_master(&pdev->dev, sizeof(struct tiny_spi));
+ if (!master)
+ return err;
+
+ /* setup the master state. */
+ master->bus_num = pdev->id;
+ master->num_chipselect = 255;
+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
+ master->setup = tiny_spi_setup;
+
+ hw = spi_master_get_devdata(master);
+ platform_set_drvdata(pdev, hw);
+
+ /* setup the state for the bitbang driver */
+ hw->bitbang.master = spi_master_get(master);
+ if (!hw->bitbang.master)
+ return err;
+ hw->bitbang.setup_transfer = tiny_spi_setup_transfer;
+ hw->bitbang.chipselect = tiny_spi_chipselect;
+ hw->bitbang.txrx_bufs = tiny_spi_txrx_bufs;
+
+ /* find and map our resources */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ goto exit_busy;
+ if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
+ pdev->name))
+ goto exit_busy;
+ hw->base = devm_ioremap_nocache(&pdev->dev, res->start,
+ resource_size(res));
+ if (!hw->base)
+ goto exit_busy;
+ /* irq is optional */
+ hw->irq = platform_get_irq(pdev, 0);
+ if (hw->irq >= 0) {
+ init_completion(&hw->done);
+ err = devm_request_irq(&pdev->dev, hw->irq, tiny_spi_irq, 0,
+ pdev->name, hw);
+ if (err)
+ goto exit;
+ }
+ /* find platform data */
+ if (platp) {
+ hw->gpio_cs_count = platp->gpio_cs_count;
+ hw->gpio_cs = platp->gpio_cs;
+ if (platp->gpio_cs_count && !platp->gpio_cs)
+ goto exit_busy;
+ hw->freq = platp->freq;
+ hw->baudwidth = platp->baudwidth;
+ } else {
+ err = tiny_spi_of_probe(pdev);
+ if (err)
+ goto exit;
+ }
+ for (i = 0; i < hw->gpio_cs_count; i++) {
+ err = gpio_request(hw->gpio_cs[i], dev_name(&pdev->dev));
+ if (err)
+ goto exit_gpio;
+ gpio_direction_output(hw->gpio_cs[i], 1);
+ }
+ hw->bitbang.master->num_chipselect = max(1U, hw->gpio_cs_count);
+
+ /* register our spi controller */
+ err = spi_bitbang_start(&hw->bitbang);
+ if (err)
+ goto exit;
+ dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);
+
+ return 0;
+
+exit_gpio:
+ while (i-- > 0)
+ gpio_free(hw->gpio_cs[i]);
+exit_busy:
+ err = -EBUSY;
+exit:
+ platform_set_drvdata(pdev, NULL);
+ spi_master_put(master);
+ return err;
+}
+
+static int __devexit tiny_spi_remove(struct platform_device *pdev)
+{
+ struct tiny_spi *hw = platform_get_drvdata(pdev);
+ struct spi_master *master = hw->bitbang.master;
+ unsigned int i;
+
+ spi_bitbang_stop(&hw->bitbang);
+ for (i = 0; i < hw->gpio_cs_count; i++)
+ gpio_free(hw->gpio_cs[i]);
+ platform_set_drvdata(pdev, NULL);
+ spi_master_put(master);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id tiny_spi_match[] = {
+ { .compatible = "opencores,tiny-spi-rtlsvn2", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, tiny_spi_match);
+#else /* CONFIG_OF */
+#define tiny_spi_match NULL
+#endif /* CONFIG_OF */
+
+static struct platform_driver tiny_spi_driver = {
+ .probe = tiny_spi_probe,
+ .remove = __devexit_p(tiny_spi_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .pm = NULL,
+ .of_match_table = tiny_spi_match,
+ },
+};
+
+static int __init tiny_spi_init(void)
+{
+ return platform_driver_register(&tiny_spi_driver);
+}
+module_init(tiny_spi_init);
+
+static void __exit tiny_spi_exit(void)
+{
+ platform_driver_unregister(&tiny_spi_driver);
+}
+module_exit(tiny_spi_exit);
+
+MODULE_DESCRIPTION("OpenCores tiny SPI driver");
+MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/spi/spi_sh.c b/drivers/spi/spi_sh.c
new file mode 100644
index 000000000000..869a07d375d6
--- /dev/null
+++ b/drivers/spi/spi_sh.c
@@ -0,0 +1,543 @@
+/*
+ * SH SPI bus driver
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ *
+ * Based on pxa2xx_spi.c:
+ * Copyright (C) 2005 Stephen Street / StreetFire Sound Labs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/spi/spi.h>
+
+#define SPI_SH_TBR 0x00
+#define SPI_SH_RBR 0x00
+#define SPI_SH_CR1 0x08
+#define SPI_SH_CR2 0x10
+#define SPI_SH_CR3 0x18
+#define SPI_SH_CR4 0x20
+#define SPI_SH_CR5 0x28
+
+/* CR1 */
+#define SPI_SH_TBE 0x80
+#define SPI_SH_TBF 0x40
+#define SPI_SH_RBE 0x20
+#define SPI_SH_RBF 0x10
+#define SPI_SH_PFONRD 0x08
+#define SPI_SH_SSDB 0x04
+#define SPI_SH_SSD 0x02
+#define SPI_SH_SSA 0x01
+
+/* CR2 */
+#define SPI_SH_RSTF 0x80
+#define SPI_SH_LOOPBK 0x40
+#define SPI_SH_CPOL 0x20
+#define SPI_SH_CPHA 0x10
+#define SPI_SH_L1M0 0x08
+
+/* CR3 */
+#define SPI_SH_MAX_BYTE 0xFF
+
+/* CR4 */
+#define SPI_SH_TBEI 0x80
+#define SPI_SH_TBFI 0x40
+#define SPI_SH_RBEI 0x20
+#define SPI_SH_RBFI 0x10
+#define SPI_SH_WPABRT 0x04
+#define SPI_SH_SSS 0x01
+
+/* CR8 */
+#define SPI_SH_P1L0 0x80
+#define SPI_SH_PP1L0 0x40
+#define SPI_SH_MUXI 0x20
+#define SPI_SH_MUXIRQ 0x10
+
+#define SPI_SH_FIFO_SIZE 32
+#define SPI_SH_SEND_TIMEOUT (3 * HZ)
+#define SPI_SH_RECEIVE_TIMEOUT (HZ >> 3)
+
+#undef DEBUG
+
+struct spi_sh_data {
+ void __iomem *addr;
+ int irq;
+ struct spi_master *master;
+ struct list_head queue;
+ struct workqueue_struct *workqueue;
+ struct work_struct ws;
+ unsigned long cr1;
+ wait_queue_head_t wait;
+ spinlock_t lock;
+};
+
+static void spi_sh_write(struct spi_sh_data *ss, unsigned long data,
+ unsigned long offset)
+{
+ writel(data, ss->addr + offset);
+}
+
+static unsigned long spi_sh_read(struct spi_sh_data *ss, unsigned long offset)
+{
+ return readl(ss->addr + offset);
+}
+
+static void spi_sh_set_bit(struct spi_sh_data *ss, unsigned long val,
+ unsigned long offset)
+{
+ unsigned long tmp;
+
+ tmp = spi_sh_read(ss, offset);
+ tmp |= val;
+ spi_sh_write(ss, tmp, offset);
+}
+
+static void spi_sh_clear_bit(struct spi_sh_data *ss, unsigned long val,
+ unsigned long offset)
+{
+ unsigned long tmp;
+
+ tmp = spi_sh_read(ss, offset);
+ tmp &= ~val;
+ spi_sh_write(ss, tmp, offset);
+}
+
+static void clear_fifo(struct spi_sh_data *ss)
+{
+ spi_sh_set_bit(ss, SPI_SH_RSTF, SPI_SH_CR2);
+ spi_sh_clear_bit(ss, SPI_SH_RSTF, SPI_SH_CR2);
+}
+
+static int spi_sh_wait_receive_buffer(struct spi_sh_data *ss)
+{
+ int timeout = 100000;
+
+ while (spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {
+ udelay(10);
+ if (timeout-- < 0)
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+static int spi_sh_wait_write_buffer_empty(struct spi_sh_data *ss)
+{
+ int timeout = 100000;
+
+ while (!(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBE)) {
+ udelay(10);
+ if (timeout-- < 0)
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+static int spi_sh_send(struct spi_sh_data *ss, struct spi_message *mesg,
+ struct spi_transfer *t)
+{
+ int i, retval = 0;
+ int remain = t->len;
+ int cur_len;
+ unsigned char *data;
+ unsigned long tmp;
+ long ret;
+
+ if (t->len)
+ spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
+
+ data = (unsigned char *)t->tx_buf;
+ while (remain > 0) {
+ cur_len = min(SPI_SH_FIFO_SIZE, remain);
+ for (i = 0; i < cur_len &&
+ !(spi_sh_read(ss, SPI_SH_CR4) &
+ SPI_SH_WPABRT) &&
+ !(spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_TBF);
+ i++)
+ spi_sh_write(ss, (unsigned long)data[i], SPI_SH_TBR);
+
+ if (spi_sh_read(ss, SPI_SH_CR4) & SPI_SH_WPABRT) {
+ /* Abort SPI operation */
+ spi_sh_set_bit(ss, SPI_SH_WPABRT, SPI_SH_CR4);
+ retval = -EIO;
+ break;
+ }
+
+ cur_len = i;
+
+ remain -= cur_len;
+ data += cur_len;
+
+ if (remain > 0) {
+ ss->cr1 &= ~SPI_SH_TBE;
+ spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4);
+ ret = wait_event_interruptible_timeout(ss->wait,
+ ss->cr1 & SPI_SH_TBE,
+ SPI_SH_SEND_TIMEOUT);
+ if (ret == 0 && !(ss->cr1 & SPI_SH_TBE)) {
+ printk(KERN_ERR "%s: timeout\n", __func__);
+ return -ETIMEDOUT;
+ }
+ }
+ }
+
+ if (list_is_last(&t->transfer_list, &mesg->transfers)) {
+ tmp = spi_sh_read(ss, SPI_SH_CR1);
+ tmp = tmp & ~(SPI_SH_SSD | SPI_SH_SSDB);
+ spi_sh_write(ss, tmp, SPI_SH_CR1);
+ spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
+
+ ss->cr1 &= ~SPI_SH_TBE;
+ spi_sh_set_bit(ss, SPI_SH_TBE, SPI_SH_CR4);
+ ret = wait_event_interruptible_timeout(ss->wait,
+ ss->cr1 & SPI_SH_TBE,
+ SPI_SH_SEND_TIMEOUT);
+ if (ret == 0 && (ss->cr1 & SPI_SH_TBE)) {
+ printk(KERN_ERR "%s: timeout\n", __func__);
+ return -ETIMEDOUT;
+ }
+ }
+
+ return retval;
+}
+
+static int spi_sh_receive(struct spi_sh_data *ss, struct spi_message *mesg,
+ struct spi_transfer *t)
+{
+ int i;
+ int remain = t->len;
+ int cur_len;
+ unsigned char *data;
+ unsigned long tmp;
+ long ret;
+
+ if (t->len > SPI_SH_MAX_BYTE)
+ spi_sh_write(ss, SPI_SH_MAX_BYTE, SPI_SH_CR3);
+ else
+ spi_sh_write(ss, t->len, SPI_SH_CR3);
+
+ tmp = spi_sh_read(ss, SPI_SH_CR1);
+ tmp = tmp & ~(SPI_SH_SSD | SPI_SH_SSDB);
+ spi_sh_write(ss, tmp, SPI_SH_CR1);
+ spi_sh_set_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
+
+ spi_sh_wait_write_buffer_empty(ss);
+
+ data = (unsigned char *)t->rx_buf;
+ while (remain > 0) {
+ if (remain >= SPI_SH_FIFO_SIZE) {
+ ss->cr1 &= ~SPI_SH_RBF;
+ spi_sh_set_bit(ss, SPI_SH_RBF, SPI_SH_CR4);
+ ret = wait_event_interruptible_timeout(ss->wait,
+ ss->cr1 & SPI_SH_RBF,
+ SPI_SH_RECEIVE_TIMEOUT);
+ if (ret == 0 &&
+ spi_sh_read(ss, SPI_SH_CR1) & SPI_SH_RBE) {
+ printk(KERN_ERR "%s: timeout\n", __func__);
+ return -ETIMEDOUT;
+ }
+ }
+
+ cur_len = min(SPI_SH_FIFO_SIZE, remain);
+ for (i = 0; i < cur_len; i++) {
+ if (spi_sh_wait_receive_buffer(ss))
+ break;
+ data[i] = (unsigned char)spi_sh_read(ss, SPI_SH_RBR);
+ }
+
+ remain -= cur_len;
+ data += cur_len;
+ }
+
+ /* deassert CS when SPI is receiving. */
+ if (t->len > SPI_SH_MAX_BYTE) {
+ clear_fifo(ss);
+ spi_sh_write(ss, 1, SPI_SH_CR3);
+ } else {
+ spi_sh_write(ss, 0, SPI_SH_CR3);
+ }
+
+ return 0;
+}
+
+static void spi_sh_work(struct work_struct *work)
+{
+ struct spi_sh_data *ss = container_of(work, struct spi_sh_data, ws);
+ struct spi_message *mesg;
+ struct spi_transfer *t;
+ unsigned long flags;
+ int ret;
+
+ pr_debug("%s: enter\n", __func__);
+
+ spin_lock_irqsave(&ss->lock, flags);
+ while (!list_empty(&ss->queue)) {
+ mesg = list_entry(ss->queue.next, struct spi_message, queue);
+ list_del_init(&mesg->queue);
+
+ spin_unlock_irqrestore(&ss->lock, flags);
+ list_for_each_entry(t, &mesg->transfers, transfer_list) {
+ pr_debug("tx_buf = %p, rx_buf = %p\n",
+ t->tx_buf, t->rx_buf);
+ pr_debug("len = %d, delay_usecs = %d\n",
+ t->len, t->delay_usecs);
+
+ if (t->tx_buf) {
+ ret = spi_sh_send(ss, mesg, t);
+ if (ret < 0)
+ goto error;
+ }
+ if (t->rx_buf) {
+ ret = spi_sh_receive(ss, mesg, t);
+ if (ret < 0)
+ goto error;
+ }
+ mesg->actual_length += t->len;
+ }
+ spin_lock_irqsave(&ss->lock, flags);
+
+ mesg->status = 0;
+ mesg->complete(mesg->context);
+ }
+
+ clear_fifo(ss);
+ spi_sh_set_bit(ss, SPI_SH_SSD, SPI_SH_CR1);
+ udelay(100);
+
+ spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,
+ SPI_SH_CR1);
+
+ clear_fifo(ss);
+
+ spin_unlock_irqrestore(&ss->lock, flags);
+
+ return;
+
+ error:
+ mesg->status = ret;
+ mesg->complete(mesg->context);
+
+ spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,
+ SPI_SH_CR1);
+ clear_fifo(ss);
+
+}
+
+static int spi_sh_setup(struct spi_device *spi)
+{
+ struct spi_sh_data *ss = spi_master_get_devdata(spi->master);
+
+ if (!spi->bits_per_word)
+ spi->bits_per_word = 8;
+
+ pr_debug("%s: enter\n", __func__);
+
+ spi_sh_write(ss, 0xfe, SPI_SH_CR1); /* SPI sycle stop */
+ spi_sh_write(ss, 0x00, SPI_SH_CR1); /* CR1 init */
+ spi_sh_write(ss, 0x00, SPI_SH_CR3); /* CR3 init */
+
+ clear_fifo(ss);
+
+ /* 1/8 clock */
+ spi_sh_write(ss, spi_sh_read(ss, SPI_SH_CR2) | 0x07, SPI_SH_CR2);
+ udelay(10);
+
+ return 0;
+}
+
+static int spi_sh_transfer(struct spi_device *spi, struct spi_message *mesg)
+{
+ struct spi_sh_data *ss = spi_master_get_devdata(spi->master);
+ unsigned long flags;
+
+ pr_debug("%s: enter\n", __func__);
+ pr_debug("\tmode = %02x\n", spi->mode);
+
+ spin_lock_irqsave(&ss->lock, flags);
+
+ mesg->actual_length = 0;
+ mesg->status = -EINPROGRESS;
+
+ spi_sh_clear_bit(ss, SPI_SH_SSA, SPI_SH_CR1);
+
+ list_add_tail(&mesg->queue, &ss->queue);
+ queue_work(ss->workqueue, &ss->ws);
+
+ spin_unlock_irqrestore(&ss->lock, flags);
+
+ return 0;
+}
+
+static void spi_sh_cleanup(struct spi_device *spi)
+{
+ struct spi_sh_data *ss = spi_master_get_devdata(spi->master);
+
+ pr_debug("%s: enter\n", __func__);
+
+ spi_sh_clear_bit(ss, SPI_SH_SSA | SPI_SH_SSDB | SPI_SH_SSD,
+ SPI_SH_CR1);
+}
+
+static irqreturn_t spi_sh_irq(int irq, void *_ss)
+{
+ struct spi_sh_data *ss = (struct spi_sh_data *)_ss;
+ unsigned long cr1;
+
+ cr1 = spi_sh_read(ss, SPI_SH_CR1);
+ if (cr1 & SPI_SH_TBE)
+ ss->cr1 |= SPI_SH_TBE;
+ if (cr1 & SPI_SH_TBF)
+ ss->cr1 |= SPI_SH_TBF;
+ if (cr1 & SPI_SH_RBE)
+ ss->cr1 |= SPI_SH_RBE;
+ if (cr1 & SPI_SH_RBF)
+ ss->cr1 |= SPI_SH_RBF;
+
+ if (ss->cr1) {
+ spi_sh_clear_bit(ss, ss->cr1, SPI_SH_CR4);
+ wake_up(&ss->wait);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int __devexit spi_sh_remove(struct platform_device *pdev)
+{
+ struct spi_sh_data *ss = dev_get_drvdata(&pdev->dev);
+
+ destroy_workqueue(ss->workqueue);
+ free_irq(ss->irq, ss);
+ iounmap(ss->addr);
+ spi_master_put(ss->master);
+
+ return 0;
+}
+
+static int __devinit spi_sh_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct spi_master *master;
+ struct spi_sh_data *ss;
+ int ret, irq;
+
+ /* get base addr */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (unlikely(res == NULL)) {
+ dev_err(&pdev->dev, "invalid resource\n");
+ return -EINVAL;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "platform_get_irq error\n");
+ return -ENODEV;
+ }
+
+ master = spi_alloc_master(&pdev->dev, sizeof(struct spi_sh_data));
+ if (master == NULL) {
+ dev_err(&pdev->dev, "spi_alloc_master error.\n");
+ return -ENOMEM;
+ }
+
+ ss = spi_master_get_devdata(master);
+ dev_set_drvdata(&pdev->dev, ss);
+
+ ss->irq = irq;
+ ss->master = master;
+ ss->addr = ioremap(res->start, resource_size(res));
+ if (ss->addr == NULL) {
+ dev_err(&pdev->dev, "ioremap error.\n");
+ ret = -ENOMEM;
+ goto error1;
+ }
+ INIT_LIST_HEAD(&ss->queue);
+ spin_lock_init(&ss->lock);
+ INIT_WORK(&ss->ws, spi_sh_work);
+ init_waitqueue_head(&ss->wait);
+ ss->workqueue = create_singlethread_workqueue(
+ dev_name(master->dev.parent));
+ if (ss->workqueue == NULL) {
+ dev_err(&pdev->dev, "create workqueue error\n");
+ ret = -EBUSY;
+ goto error2;
+ }
+
+ ret = request_irq(irq, spi_sh_irq, IRQF_DISABLED, "spi_sh", ss);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "request_irq error\n");
+ goto error3;
+ }
+
+ master->num_chipselect = 2;
+ master->bus_num = pdev->id;
+ master->setup = spi_sh_setup;
+ master->transfer = spi_sh_transfer;
+ master->cleanup = spi_sh_cleanup;
+
+ ret = spi_register_master(master);
+ if (ret < 0) {
+ printk(KERN_ERR "spi_register_master error.\n");
+ goto error4;
+ }
+
+ return 0;
+
+ error4:
+ free_irq(irq, ss);
+ error3:
+ destroy_workqueue(ss->workqueue);
+ error2:
+ iounmap(ss->addr);
+ error1:
+ spi_master_put(master);
+
+ return ret;
+}
+
+static struct platform_driver spi_sh_driver = {
+ .probe = spi_sh_probe,
+ .remove = __devexit_p(spi_sh_remove),
+ .driver = {
+ .name = "sh_spi",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init spi_sh_init(void)
+{
+ return platform_driver_register(&spi_sh_driver);
+}
+module_init(spi_sh_init);
+
+static void __exit spi_sh_exit(void)
+{
+ platform_driver_unregister(&spi_sh_driver);
+}
+module_exit(spi_sh_exit);
+
+MODULE_DESCRIPTION("SH SPI bus driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yoshihiro Shimoda");
+MODULE_ALIAS("platform:sh_spi");
diff --git a/drivers/spi/spi_sh_msiof.c b/drivers/spi/spi_sh_msiof.c
index 2c665fceaac7..e00d94b22250 100644
--- a/drivers/spi/spi_sh_msiof.c
+++ b/drivers/spi/spi_sh_msiof.c
@@ -9,22 +9,22 @@
*
*/
-#include <linux/kernel.h>
-#include <linux/init.h>
+#include <linux/bitmap.h>
+#include <linux/clk.h>
+#include <linux/completion.h>
#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
#include <linux/platform_device.h>
-#include <linux/completion.h>
#include <linux/pm_runtime.h>
-#include <linux/gpio.h>
-#include <linux/bitmap.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/err.h>
+#include <linux/spi/sh_msiof.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
-#include <linux/spi/sh_msiof.h>
#include <asm/unaligned.h>
@@ -67,7 +67,7 @@ struct sh_msiof_spi_priv {
#define STR_TEOF (1 << 23)
#define STR_REOF (1 << 7)
-static unsigned long sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs)
+static u32 sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs)
{
switch (reg_offs) {
case TSCR:
@@ -79,7 +79,7 @@ static unsigned long sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs)
}
static void sh_msiof_write(struct sh_msiof_spi_priv *p, int reg_offs,
- unsigned long value)
+ u32 value)
{
switch (reg_offs) {
case TSCR:
@@ -93,10 +93,10 @@ static void sh_msiof_write(struct sh_msiof_spi_priv *p, int reg_offs,
}
static int sh_msiof_modify_ctr_wait(struct sh_msiof_spi_priv *p,
- unsigned long clr, unsigned long set)
+ u32 clr, u32 set)
{
- unsigned long mask = clr | set;
- unsigned long data;
+ u32 mask = clr | set;
+ u32 data;
int k;
data = sh_msiof_read(p, CTR);
@@ -166,10 +166,10 @@ static void sh_msiof_spi_set_clk_regs(struct sh_msiof_spi_priv *p,
}
static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p,
- int cpol, int cpha,
- int tx_hi_z, int lsb_first)
+ u32 cpol, u32 cpha,
+ u32 tx_hi_z, u32 lsb_first)
{
- unsigned long tmp;
+ u32 tmp;
int edge;
/*
@@ -187,7 +187,7 @@ static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p,
tmp |= cpol << 30; /* TSCKIZ */
tmp |= cpol << 28; /* RSCKIZ */
- edge = cpol ? cpha : !cpha;
+ edge = cpol ^ !cpha;
tmp |= edge << 27; /* TEDG */
tmp |= edge << 26; /* REDG */
@@ -197,11 +197,9 @@ static void sh_msiof_spi_set_pin_regs(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_set_mode_regs(struct sh_msiof_spi_priv *p,
const void *tx_buf, void *rx_buf,
- int bits, int words)
+ u32 bits, u32 words)
{
- unsigned long dr2;
-
- dr2 = ((bits - 1) << 24) | ((words - 1) << 16);
+ u32 dr2 = ((bits - 1) << 24) | ((words - 1) << 16);
if (tx_buf)
sh_msiof_write(p, TMDR2, dr2);
@@ -222,7 +220,7 @@ static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p)
static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p,
const void *tx_buf, int words, int fs)
{
- const unsigned char *buf_8 = tx_buf;
+ const u8 *buf_8 = tx_buf;
int k;
for (k = 0; k < words; k++)
@@ -232,7 +230,7 @@ static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_write_fifo_16(struct sh_msiof_spi_priv *p,
const void *tx_buf, int words, int fs)
{
- const unsigned short *buf_16 = tx_buf;
+ const u16 *buf_16 = tx_buf;
int k;
for (k = 0; k < words; k++)
@@ -242,7 +240,7 @@ static void sh_msiof_spi_write_fifo_16(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_write_fifo_16u(struct sh_msiof_spi_priv *p,
const void *tx_buf, int words, int fs)
{
- const unsigned short *buf_16 = tx_buf;
+ const u16 *buf_16 = tx_buf;
int k;
for (k = 0; k < words; k++)
@@ -252,7 +250,7 @@ static void sh_msiof_spi_write_fifo_16u(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_write_fifo_32(struct sh_msiof_spi_priv *p,
const void *tx_buf, int words, int fs)
{
- const unsigned int *buf_32 = tx_buf;
+ const u32 *buf_32 = tx_buf;
int k;
for (k = 0; k < words; k++)
@@ -262,17 +260,37 @@ static void sh_msiof_spi_write_fifo_32(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_write_fifo_32u(struct sh_msiof_spi_priv *p,
const void *tx_buf, int words, int fs)
{
- const unsigned int *buf_32 = tx_buf;
+ const u32 *buf_32 = tx_buf;
int k;
for (k = 0; k < words; k++)
sh_msiof_write(p, TFDR, get_unaligned(&buf_32[k]) << fs);
}
+static void sh_msiof_spi_write_fifo_s32(struct sh_msiof_spi_priv *p,
+ const void *tx_buf, int words, int fs)
+{
+ const u32 *buf_32 = tx_buf;
+ int k;
+
+ for (k = 0; k < words; k++)
+ sh_msiof_write(p, TFDR, swab32(buf_32[k] << fs));
+}
+
+static void sh_msiof_spi_write_fifo_s32u(struct sh_msiof_spi_priv *p,
+ const void *tx_buf, int words, int fs)
+{
+ const u32 *buf_32 = tx_buf;
+ int k;
+
+ for (k = 0; k < words; k++)
+ sh_msiof_write(p, TFDR, swab32(get_unaligned(&buf_32[k]) << fs));
+}
+
static void sh_msiof_spi_read_fifo_8(struct sh_msiof_spi_priv *p,
void *rx_buf, int words, int fs)
{
- unsigned char *buf_8 = rx_buf;
+ u8 *buf_8 = rx_buf;
int k;
for (k = 0; k < words; k++)
@@ -282,7 +300,7 @@ static void sh_msiof_spi_read_fifo_8(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_read_fifo_16(struct sh_msiof_spi_priv *p,
void *rx_buf, int words, int fs)
{
- unsigned short *buf_16 = rx_buf;
+ u16 *buf_16 = rx_buf;
int k;
for (k = 0; k < words; k++)
@@ -292,7 +310,7 @@ static void sh_msiof_spi_read_fifo_16(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_read_fifo_16u(struct sh_msiof_spi_priv *p,
void *rx_buf, int words, int fs)
{
- unsigned short *buf_16 = rx_buf;
+ u16 *buf_16 = rx_buf;
int k;
for (k = 0; k < words; k++)
@@ -302,7 +320,7 @@ static void sh_msiof_spi_read_fifo_16u(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_read_fifo_32(struct sh_msiof_spi_priv *p,
void *rx_buf, int words, int fs)
{
- unsigned int *buf_32 = rx_buf;
+ u32 *buf_32 = rx_buf;
int k;
for (k = 0; k < words; k++)
@@ -312,19 +330,40 @@ static void sh_msiof_spi_read_fifo_32(struct sh_msiof_spi_priv *p,
static void sh_msiof_spi_read_fifo_32u(struct sh_msiof_spi_priv *p,
void *rx_buf, int words, int fs)
{
- unsigned int *buf_32 = rx_buf;
+ u32 *buf_32 = rx_buf;
int k;
for (k = 0; k < words; k++)
put_unaligned(sh_msiof_read(p, RFDR) >> fs, &buf_32[k]);
}
+static void sh_msiof_spi_read_fifo_s32(struct sh_msiof_spi_priv *p,
+ void *rx_buf, int words, int fs)
+{
+ u32 *buf_32 = rx_buf;
+ int k;
+
+ for (k = 0; k < words; k++)
+ buf_32[k] = swab32(sh_msiof_read(p, RFDR) >> fs);
+}
+
+static void sh_msiof_spi_read_fifo_s32u(struct sh_msiof_spi_priv *p,
+ void *rx_buf, int words, int fs)
+{
+ u32 *buf_32 = rx_buf;
+ int k;
+
+ for (k = 0; k < words; k++)
+ put_unaligned(swab32(sh_msiof_read(p, RFDR) >> fs), &buf_32[k]);
+}
+
static int sh_msiof_spi_bits(struct spi_device *spi, struct spi_transfer *t)
{
int bits;
bits = t ? t->bits_per_word : 0;
- bits = bits ? bits : spi->bits_per_word;
+ if (!bits)
+ bits = spi->bits_per_word;
return bits;
}
@@ -334,7 +373,8 @@ static unsigned long sh_msiof_spi_hz(struct spi_device *spi,
unsigned long hz;
hz = t ? t->speed_hz : 0;
- hz = hz ? hz : spi->max_speed_hz;
+ if (!hz)
+ hz = spi->max_speed_hz;
return hz;
}
@@ -468,9 +508,17 @@ static int sh_msiof_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
int bytes_done;
int words;
int n;
+ bool swab;
bits = sh_msiof_spi_bits(spi, t);
+ if (bits <= 8 && t->len > 15 && !(t->len & 3)) {
+ bits = 32;
+ swab = true;
+ } else {
+ swab = false;
+ }
+
/* setup bytes per word and fifo read/write functions */
if (bits <= 8) {
bytes_per_word = 1;
@@ -487,6 +535,17 @@ static int sh_msiof_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
rx_fifo = sh_msiof_spi_read_fifo_16u;
else
rx_fifo = sh_msiof_spi_read_fifo_16;
+ } else if (swab) {
+ bytes_per_word = 4;
+ if ((unsigned long)t->tx_buf & 0x03)
+ tx_fifo = sh_msiof_spi_write_fifo_s32u;
+ else
+ tx_fifo = sh_msiof_spi_write_fifo_s32;
+
+ if ((unsigned long)t->rx_buf & 0x03)
+ rx_fifo = sh_msiof_spi_read_fifo_s32u;
+ else
+ rx_fifo = sh_msiof_spi_read_fifo_s32;
} else {
bytes_per_word = 4;
if ((unsigned long)t->tx_buf & 0x03)
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 603428213d21..d9fd86211365 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -30,6 +30,7 @@
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/compat.h>
#include <linux/spi/spi.h>
#include <linux/spi/spidev.h>
@@ -471,6 +472,16 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return retval;
}
+#ifdef CONFIG_COMPAT
+static long
+spidev_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ return spidev_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#else
+#define spidev_compat_ioctl NULL
+#endif /* CONFIG_COMPAT */
+
static int spidev_open(struct inode *inode, struct file *filp)
{
struct spidev_data *spidev;
@@ -543,6 +554,7 @@ static const struct file_operations spidev_fops = {
.write = spidev_write,
.read = spidev_read,
.unlocked_ioctl = spidev_ioctl,
+ .compat_ioctl = spidev_compat_ioctl,
.open = spidev_open,
.release = spidev_release,
.llseek = no_llseek,
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 11:43:13 +0300