From c4028958b6ecad064b1a6303a6a5906d4fe48d73 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 22 Nov 2006 14:57:56 +0000 Subject: WorkStruct: make allyesconfig Fix up for make allyesconfig. Signed-Off-By: David Howells --- drivers/mmc/mmc.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) (limited to 'drivers/mmc/mmc.c') diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 766bc54406e5..21fd39e4a20f 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1165,18 +1165,16 @@ static void mmc_setup(struct mmc_host *host) */ void mmc_detect_change(struct mmc_host *host, unsigned long delay) { - if (delay) - mmc_schedule_delayed_work(&host->detect, delay); - else - mmc_schedule_work(&host->detect); + mmc_schedule_delayed_work(&host->detect, delay); } EXPORT_SYMBOL(mmc_detect_change); -static void mmc_rescan(void *data) +static void mmc_rescan(struct work_struct *work) { - struct mmc_host *host = data; + struct mmc_host *host = + container_of(work, struct mmc_host, detect.work); struct list_head *l, *n; unsigned char power_mode; @@ -1259,7 +1257,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) spin_lock_init(&host->lock); init_waitqueue_head(&host->wq); INIT_LIST_HEAD(&host->cards); - INIT_WORK(&host->detect, mmc_rescan, host); + INIT_DELAYED_WORK(&host->detect, mmc_rescan); /* * By default, hosts do not support SGIO or large requests. @@ -1357,7 +1355,7 @@ EXPORT_SYMBOL(mmc_suspend_host); */ int mmc_resume_host(struct mmc_host *host) { - mmc_rescan(host); + mmc_rescan(&host->detect.work); return 0; } -- cgit v1.2.3 From bce40a36de574376f41f1ff3c4d212a7da2a3c90 Mon Sep 17 00:00:00 2001 From: Philip Langdale Date: Sat, 21 Oct 2006 12:35:02 +0200 Subject: [PATCH] mmc: Add support for mmc v4 high speed mode This adds support for the high-speed modes defined by mmc v4 (assuming the host controller is up to it). On a TI sdhci controller, it improves read speed from 1.3MBps to 2.3MBps. The TI controller can only go up to 24MHz, but everything helps. Another person has taken this basic patch and used it on a Nokia 770 to get a bigger boost because that controller can run at 48MHZ. Signed-off-by: Philip Langdale Signed-off-by: Pierre Ossman --- drivers/mmc/mmc.c | 121 ++++++++++++++++++++++++++++++++++++++++++- include/linux/mmc/card.h | 8 +++ include/linux/mmc/protocol.h | 47 +++++++++++++++-- 3 files changed, 171 insertions(+), 5 deletions(-) (limited to 'drivers/mmc/mmc.c') diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 766bc54406e5..2d5b93000dee 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -4,6 +4,7 @@ * Copyright (C) 2003-2004 Russell King, All Rights Reserved. * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. * SD support Copyright (C) 2005 Pierre Ossman, All Rights Reserved. + * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. * * 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 @@ -953,6 +954,114 @@ static void mmc_read_csds(struct mmc_host *host) } } +static void mmc_process_ext_csds(struct mmc_host *host) +{ + int err; + struct mmc_card *card; + + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + + struct scatterlist sg; + + /* + * As the ext_csd is so large and mostly unused, we don't store the + * raw block in mmc_card. + */ + u8 *ext_csd; + ext_csd = kmalloc(512, GFP_KERNEL); + if (!ext_csd) { + printk("%s: could not allocate a buffer to receive the ext_csd." + "mmc v4 cards will be treated as v3.\n", + mmc_hostname(host)); + return; + } + + list_for_each_entry(card, &host->cards, node) { + if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT)) + continue; + if (mmc_card_sd(card)) + continue; + if (card->csd.mmca_vsn < CSD_SPEC_VER_4) + continue; + + err = mmc_select_card(host, card); + if (err != MMC_ERR_NONE) { + mmc_card_set_dead(card); + continue; + } + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = MMC_SEND_EXT_CSD; + cmd.arg = 0; + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + memset(&data, 0, sizeof(struct mmc_data)); + + mmc_set_data_timeout(&data, card, 0); + + data.blksz = 512; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + memset(&mrq, 0, sizeof(struct mmc_request)); + + mrq.cmd = &cmd; + mrq.data = &data; + + sg_init_one(&sg, ext_csd, 512); + + mmc_wait_for_req(host, &mrq); + + if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { + mmc_card_set_dead(card); + continue; + } + + switch (ext_csd[EXT_CSD_CARD_TYPE]) { + case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: + card->ext_csd.hs_max_dtr = 52000000; + break; + case EXT_CSD_CARD_TYPE_26: + card->ext_csd.hs_max_dtr = 26000000; + break; + default: + /* MMC v4 spec says this cannot happen */ + printk("%s: card is mmc v4 but doesn't support " + "any high-speed modes.\n", + mmc_hostname(card->host)); + mmc_card_set_bad(card); + continue; + } + + /* Activate highspeed support. */ + cmd.opcode = MMC_SWITCH; + cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (EXT_CSD_HS_TIMING << 16) | + (1 << 8) | + EXT_CSD_CMD_SET_NORMAL; + cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; + + err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); + if (err != MMC_ERR_NONE) { + printk("%s: failed to switch card to mmc v4 " + "high-speed mode.\n", + mmc_hostname(card->host)); + continue; + } + + mmc_card_set_highspeed(card); + } + + kfree(ext_csd); + + mmc_deselect_cards(host); +} + static void mmc_read_scrs(struct mmc_host *host) { int err; @@ -1031,8 +1140,14 @@ static unsigned int mmc_calculate_clock(struct mmc_host *host) unsigned int max_dtr = host->f_max; list_for_each_entry(card, &host->cards, node) - if (!mmc_card_dead(card) && max_dtr > card->csd.max_dtr) - max_dtr = card->csd.max_dtr; + if (!mmc_card_dead(card)) { + if (mmc_card_highspeed(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) { + max_dtr = card->csd.max_dtr; + } + } pr_debug("%s: selected %d.%03dMHz transfer rate\n", mmc_hostname(host), @@ -1152,6 +1267,8 @@ static void mmc_setup(struct mmc_host *host) if (host->mode == MMC_MODE_SD) mmc_read_scrs(host); + else + mmc_process_ext_csds(host); } diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 991a37382a22..ce25256f80d5 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -39,6 +39,10 @@ struct mmc_csd { write_misalign:1; }; +struct mmc_ext_csd { + unsigned int hs_max_dtr; +}; + struct sd_scr { unsigned char sda_vsn; unsigned char bus_widths; @@ -62,11 +66,13 @@ struct mmc_card { #define MMC_STATE_BAD (1<<2) /* unrecognised device */ #define MMC_STATE_SDCARD (1<<3) /* is an SD card */ #define MMC_STATE_READONLY (1<<4) /* card is read-only */ +#define MMC_STATE_HIGHSPEED (1<<5) /* card is in mmc4 highspeed mode */ u32 raw_cid[4]; /* raw card CID */ u32 raw_csd[4]; /* raw card CSD */ u32 raw_scr[2]; /* raw card SCR */ struct mmc_cid cid; /* card identification */ struct mmc_csd csd; /* card specific */ + struct mmc_ext_csd ext_csd; /* mmc v4 extended card specific */ struct sd_scr scr; /* extra SD information */ }; @@ -75,12 +81,14 @@ struct mmc_card { #define mmc_card_bad(c) ((c)->state & MMC_STATE_BAD) #define mmc_card_sd(c) ((c)->state & MMC_STATE_SDCARD) #define mmc_card_readonly(c) ((c)->state & MMC_STATE_READONLY) +#define mmc_card_highspeed(c) ((c)->state & MMC_STATE_HIGHSPEED) #define mmc_card_set_present(c) ((c)->state |= MMC_STATE_PRESENT) #define mmc_card_set_dead(c) ((c)->state |= MMC_STATE_DEAD) #define mmc_card_set_bad(c) ((c)->state |= MMC_STATE_BAD) #define mmc_card_set_sd(c) ((c)->state |= MMC_STATE_SDCARD) #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_name(c) ((c)->cid.prod_name) #define mmc_card_id(c) ((c)->dev.bus_id) diff --git a/include/linux/mmc/protocol.h b/include/linux/mmc/protocol.h index 08dec8d9e703..311b6547f561 100644 --- a/include/linux/mmc/protocol.h +++ b/include/linux/mmc/protocol.h @@ -25,14 +25,16 @@ #ifndef MMC_MMC_PROTOCOL_H #define MMC_MMC_PROTOCOL_H -/* Standard MMC commands (3.1) type argument response */ +/* Standard MMC commands (4.1) type argument response */ /* class 1 */ #define MMC_GO_IDLE_STATE 0 /* bc */ #define MMC_SEND_OP_COND 1 /* bcr [31:0] OCR R3 */ #define MMC_ALL_SEND_CID 2 /* bcr R2 */ #define MMC_SET_RELATIVE_ADDR 3 /* ac [31:16] RCA R1 */ #define MMC_SET_DSR 4 /* bc [31:16] RCA */ +#define MMC_SWITCH 6 /* ac [31:0] See below R1b */ #define MMC_SELECT_CARD 7 /* ac [31:16] RCA R1 */ +#define MMC_SEND_EXT_CSD 8 /* adtc R1 */ #define MMC_SEND_CSD 9 /* ac [31:16] RCA R2 */ #define MMC_SEND_CID 10 /* ac [31:16] RCA R2 */ #define MMC_READ_DAT_UNTIL_STOP 11 /* adtc [31:0] dadr R1 */ @@ -87,6 +89,17 @@ #define SD_APP_OP_COND 41 /* bcr [31:0] OCR R3 */ #define SD_APP_SEND_SCR 51 /* adtc R1 */ +/* + * MMC_SWITCH argument format: + * + * [31:26] Always 0 + * [25:24] Access Mode + * [23:16] Location of target Byte in EXT_CSD + * [15:08] Value Byte + * [07:03] Always 0 + * [02:00] Command Set + */ + /* MMC status in R1 Type @@ -230,13 +243,41 @@ struct _mmc_csd { #define CSD_STRUCT_VER_1_0 0 /* Valid for system specification 1.0 - 1.2 */ #define CSD_STRUCT_VER_1_1 1 /* Valid for system specification 1.4 - 2.2 */ -#define CSD_STRUCT_VER_1_2 2 /* Valid for system specification 3.1 */ +#define CSD_STRUCT_VER_1_2 2 /* Valid for system specification 3.1 - 3.2 - 3.31 - 4.0 - 4.1 */ +#define CSD_STRUCT_EXT_CSD 3 /* Version is coded in CSD_STRUCTURE in EXT_CSD */ #define CSD_SPEC_VER_0 0 /* Implements system specification 1.0 - 1.2 */ #define CSD_SPEC_VER_1 1 /* Implements system specification 1.4 */ #define CSD_SPEC_VER_2 2 /* Implements system specification 2.0 - 2.2 */ -#define CSD_SPEC_VER_3 3 /* Implements system specification 3.1 */ +#define CSD_SPEC_VER_3 3 /* Implements system specification 3.1 - 3.2 - 3.31 */ +#define CSD_SPEC_VER_4 4 /* Implements system specification 4.0 - 4.1 */ + +/* + * EXT_CSD fields + */ + +#define EXT_CSD_HS_TIMING 185 /* R/W */ +#define EXT_CSD_CARD_TYPE 196 /* RO */ + +/* + * EXT_CSD field definitions + */ + +#define EXT_CSD_CMD_SET_NORMAL (1<<0) +#define EXT_CSD_CMD_SET_SECURE (1<<1) +#define EXT_CSD_CMD_SET_CPSECURE (1<<2) + +#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 */ + +/* + * MMC_SWITCH access modes + */ +#define MMC_SWITCH_MODE_CMD_SET 0x00 /* Change the command set */ +#define MMC_SWITCH_MODE_SET_BITS 0x01 /* Set bits which are 1 in value */ +#define MMC_SWITCH_MODE_CLEAR_BITS 0x02 /* Clear bits which are 1 in value */ +#define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target to value */ /* * SD bus widths -- cgit v1.2.3 From e45a1bd20fa5b920901879e85cdf5eda21f78d7c Mon Sep 17 00:00:00 2001 From: Philip Langdale Date: Sun, 29 Oct 2006 10:14:19 +0100 Subject: mmc: Add support for mmc v4 wide-bus modes This change adds support for the mmc4 4-bit wide-bus mode. The mmc4 spec defines 8-bit and 4-bit transfer modes. As we do not support any 8-bit hardware, this patch only adds support for the 4-bit mode, but it can easily be built upon when the time comes. The 4-bit mode is electrically compatible with SD's 4-bit mode but the procedure for turning it on is different. This patch implements only the essential parts of the procedure as defined by the spec. Two additional steps are recommended but not compulsory. I am documenting them here so that there's a record. 1) A bus-test mechanism is implemented using dedicated mmc commands which allow for testing the functionality of the data bus at the electrical level. This is pretty paranoid and they way the commands work is not compatible with the mmc subsystem (they don't set valid CRC values). 2) MMC v4 cards can indicate they would like to draw more than the default amount of current in wide-bus modes. We currently will never switch the card into a higher draw mode. Supposedly, allowing the card to draw more current will let it perform better, but the specs seem to indicate that the card will function correctly without the mode change. Empirical testing supports this interpretation. Signed-off-by: Philip Langdale Signed-off-by: Pierre Ossman --- drivers/mmc/mmc.c | 51 ++++++++++++++++++++++++++++++++------------ include/linux/mmc/protocol.h | 5 +++++ 2 files changed, 42 insertions(+), 14 deletions(-) (limited to 'drivers/mmc/mmc.c') diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 2d5b93000dee..1593a6a632cf 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -397,23 +397,23 @@ static int mmc_select_card(struct mmc_host *host, struct mmc_card *card) return err; /* - * Default bus width is 1 bit. - */ - host->ios.bus_width = MMC_BUS_WIDTH_1; - - /* - * We can only change the bus width of the selected - * card so therefore we have to put the handling + * We can only change the bus width of SD cards when + * they are selected so we have to put the handling * here. + * + * The card is in 1 bit mode by default so + * we only need to change if it supports the + * wider version. */ - if (host->caps & MMC_CAP_4_BIT_DATA) { + if (mmc_card_sd(card) && + (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { + /* - * The card is in 1 bit mode by default so - * we only need to change if it supports the - * wider version. - */ - if (mmc_card_sd(card) && - (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) { + * Default bus width is 1 bit. + */ + host->ios.bus_width = MMC_BUS_WIDTH_1; + + if (host->caps & MMC_CAP_4_BIT_DATA) { struct mmc_command cmd; cmd.opcode = SD_APP_SET_BUS_WIDTH; cmd.arg = SD_BUS_WIDTH_4; @@ -1055,6 +1055,29 @@ static void mmc_process_ext_csds(struct mmc_host *host) } mmc_card_set_highspeed(card); + + /* Check for host support for wide-bus modes. */ + if (!(host->caps & MMC_CAP_4_BIT_DATA)) { + continue; + } + + /* Activate 4-bit support. */ + cmd.opcode = MMC_SWITCH; + cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (EXT_CSD_BUS_WIDTH << 16) | + (EXT_CSD_BUS_WIDTH_4 << 8) | + EXT_CSD_CMD_SET_NORMAL; + cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; + + err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES); + if (err != MMC_ERR_NONE) { + printk("%s: failed to switch card to " + "mmc v4 4-bit bus mode.\n", + mmc_hostname(card->host)); + continue; + } + + host->ios.bus_width = MMC_BUS_WIDTH_4; } kfree(ext_csd); diff --git a/include/linux/mmc/protocol.h b/include/linux/mmc/protocol.h index 311b6547f561..45c51fd85786 100644 --- a/include/linux/mmc/protocol.h +++ b/include/linux/mmc/protocol.h @@ -256,6 +256,7 @@ struct _mmc_csd { * EXT_CSD fields */ +#define EXT_CSD_BUS_WIDTH 183 /* R/W */ #define EXT_CSD_HS_TIMING 185 /* R/W */ #define EXT_CSD_CARD_TYPE 196 /* RO */ @@ -270,6 +271,10 @@ 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_BUS_WIDTH_1 0 /* Card is in 1 bit mode */ +#define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */ +#define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */ + /* * MMC_SWITCH access modes */ -- cgit v1.2.3 From 73778120c4088a0a7b59c4c378904f7a230b4820 Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Sun, 22 Oct 2006 22:13:10 +0200 Subject: mmc: Fix mmc_delay() function Several fixes for mmc_delay(): * Repair if-clause that was supposed to detect sub-hz delays. * Change yield() to cond_resched() as yield() no longer has the semantics we desire. * mmc_delay() is used to guarantee protocol delays, so we cannot return early (i.e. use _interruptable). Based on patch by Amol Lad. Signed-off-by: Pierre Ossman --- drivers/mmc/mmc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/mmc/mmc.c') diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 1593a6a632cf..82b7643c1654 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -454,11 +454,11 @@ static void mmc_deselect_cards(struct mmc_host *host) static inline void mmc_delay(unsigned int ms) { - if (ms < HZ / 1000) { - yield(); + if (ms < 1000 / HZ) { + cond_resched(); mdelay(ms); } else { - msleep_interruptible (ms); + msleep(ms); } } -- cgit v1.2.3 From 7ccd266e676a3f0c6f8f897f58b684cac3dd1650 Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Wed, 8 Nov 2006 23:03:10 +0100 Subject: mmc: Support for high speed SD cards Modern SD cards support a clock speed of 50 MHz. Make sure we test for this capability and do the song and dance required to activate it. Activating high speed support actually modifies the TRAN_SPEED field of the CSD. But as the spec says that the cards must report 50 MHz, we might as well skip re-reading the CSD. Signed-off-by: Pierre Ossman --- drivers/mmc/mmc.c | 122 +++++++++++++++++++++++++++++++++++++++++-- include/linux/mmc/card.h | 7 ++- include/linux/mmc/protocol.h | 22 ++++++++ 3 files changed, 146 insertions(+), 5 deletions(-) (limited to 'drivers/mmc/mmc.c') diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 82b7643c1654..9d190022a490 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1157,6 +1157,116 @@ static void mmc_read_scrs(struct mmc_host *host) mmc_deselect_cards(host); } +static void mmc_read_switch_caps(struct mmc_host *host) +{ + int err; + struct mmc_card *card; + struct mmc_request mrq; + struct mmc_command cmd; + struct mmc_data data; + unsigned char *status; + struct scatterlist sg; + + status = kmalloc(64, GFP_KERNEL); + if (!status) { + printk(KERN_WARNING "%s: Unable to allocate buffer for " + "reading switch capabilities.\n", + mmc_hostname(host)); + return; + } + + list_for_each_entry(card, &host->cards, node) { + if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT)) + continue; + if (!mmc_card_sd(card)) + continue; + if (card->scr.sda_vsn < SCR_SPEC_VER_1) + continue; + + err = mmc_select_card(host, card); + if (err != MMC_ERR_NONE) { + mmc_card_set_dead(card); + continue; + } + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_SWITCH; + cmd.arg = 0x00FFFFF1; + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + memset(&data, 0, sizeof(struct mmc_data)); + + mmc_set_data_timeout(&data, card, 0); + + data.blksz = 64; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + memset(&mrq, 0, sizeof(struct mmc_request)); + + mrq.cmd = &cmd; + mrq.data = &data; + + sg_init_one(&sg, status, 64); + + mmc_wait_for_req(host, &mrq); + + if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { + mmc_card_set_dead(card); + continue; + } + + if (status[13] & 0x02) + card->sw_caps.hs_max_dtr = 50000000; + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_SWITCH; + cmd.arg = 0x80FFFFF1; + cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; + + memset(&data, 0, sizeof(struct mmc_data)); + + mmc_set_data_timeout(&data, card, 0); + + data.blksz = 64; + data.blocks = 1; + data.flags = MMC_DATA_READ; + data.sg = &sg; + data.sg_len = 1; + + memset(&mrq, 0, sizeof(struct mmc_request)); + + mrq.cmd = &cmd; + mrq.data = &data; + + sg_init_one(&sg, status, 64); + + mmc_wait_for_req(host, &mrq); + + if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { + mmc_card_set_dead(card); + continue; + } + + if ((status[16] & 0xF) != 1) { + printk(KERN_WARNING "%s: Problem switching card " + "into high-speed mode!\n", + mmc_hostname(host)); + continue; + } + + mmc_card_set_highspeed(card); + } + + kfree(status); + + mmc_deselect_cards(host); +} + static unsigned int mmc_calculate_clock(struct mmc_host *host) { struct mmc_card *card; @@ -1164,9 +1274,12 @@ static unsigned int mmc_calculate_clock(struct mmc_host *host) list_for_each_entry(card, &host->cards, node) if (!mmc_card_dead(card)) { - if (mmc_card_highspeed(card)) { + if (mmc_card_highspeed(card) && mmc_card_sd(card)) { + if (max_dtr > card->sw_caps.hs_max_dtr) + max_dtr = card->sw_caps.hs_max_dtr; + } else if (mmc_card_highspeed(card) && !mmc_card_sd(card)) { if (max_dtr > card->ext_csd.hs_max_dtr) - max_dtr = card->ext_csd.hs_max_dtr; + max_dtr = card->ext_csd.hs_max_dtr; } else if (max_dtr > card->csd.max_dtr) { max_dtr = card->csd.max_dtr; } @@ -1288,9 +1401,10 @@ static void mmc_setup(struct mmc_host *host) mmc_read_csds(host); - if (host->mode == MMC_MODE_SD) + if (host->mode == MMC_MODE_SD) { mmc_read_scrs(host); - else + mmc_read_switch_caps(host); + } else mmc_process_ext_csds(host); } diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index ce25256f80d5..d0e6a5497614 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -50,6 +50,10 @@ struct sd_scr { #define SD_SCR_BUS_WIDTH_4 (1<<2) }; +struct sd_switch_caps { + unsigned int hs_max_dtr; +}; + struct mmc_host; /* @@ -66,7 +70,7 @@ struct mmc_card { #define MMC_STATE_BAD (1<<2) /* unrecognised device */ #define MMC_STATE_SDCARD (1<<3) /* is an SD card */ #define MMC_STATE_READONLY (1<<4) /* card is read-only */ -#define MMC_STATE_HIGHSPEED (1<<5) /* card is in mmc4 highspeed mode */ +#define MMC_STATE_HIGHSPEED (1<<5) /* card is in high speed mode */ u32 raw_cid[4]; /* raw card CID */ u32 raw_csd[4]; /* raw card CSD */ u32 raw_scr[2]; /* raw card SCR */ @@ -74,6 +78,7 @@ struct mmc_card { struct mmc_csd csd; /* card specific */ struct mmc_ext_csd ext_csd; /* mmc v4 extended card specific */ struct sd_scr scr; /* extra SD information */ + struct sd_switch_caps sw_caps; /* switch (CMD6) caps */ }; #define mmc_card_present(c) ((c)->state & MMC_STATE_PRESENT) diff --git a/include/linux/mmc/protocol.h b/include/linux/mmc/protocol.h index 45c51fd85786..2dce60c43f4b 100644 --- a/include/linux/mmc/protocol.h +++ b/include/linux/mmc/protocol.h @@ -82,6 +82,7 @@ /* class 8 */ /* This is basically the same command as for MMC with some quirks. */ #define SD_SEND_RELATIVE_ADDR 3 /* bcr R6 */ +#define SD_SWITCH 6 /* adtc [31:0] See below R1 */ /* Application commands */ #define SD_APP_SET_BUS_WIDTH 6 /* ac [1:0] bus width R1 */ @@ -100,6 +101,19 @@ * [02:00] Command Set */ +/* + * SD_SWITCH argument format: + * + * [31] Check (0) or switch (1) + * [30:24] Reserved (0) + * [23:20] Function group 6 + * [19:16] Function group 5 + * [15:12] Function group 4 + * [11:8] Function group 3 + * [7:4] Function group 2 + * [3:0] Function group 1 + */ + /* MMC status in R1 Type @@ -284,6 +298,14 @@ struct _mmc_csd { #define MMC_SWITCH_MODE_CLEAR_BITS 0x02 /* Clear bits which are 1 in value */ #define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target to value */ +/* + * SCR field definitions + */ + +#define SCR_SPEC_VER_0 0 /* Implements system specification 1.0 - 1.01 */ +#define SCR_SPEC_VER_1 1 /* Implements system specification 1.10 */ +#define SCR_SPEC_VER_2 2 /* Implements system specification 2.00 */ + /* * SD bus widths */ -- cgit v1.2.3