From 9a0da648ff3a5020406ac7784eb3b519014f66f6 Mon Sep 17 00:00:00 2001
From: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Date: Thu, 15 Sep 2011 17:43:04 +0200
Subject: mmc: sdio: Workaround for dev with broken CMD53
Adds a quirk which can be turned on for SDIO devices that do not support
512 byte requests in byte mode during CMD53. These requests will always
be sent in block mode instead.
This patch also enables this quirk for ST-Ericsson CW1200 WLAN device.
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>
---
include/linux/mmc/card.h | 7 +++++++
1 file changed, 7 insertions(+)
(limited to 'include/linux/mmc/card.h')
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index b460fc2af8a..6dfb293326e 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -188,6 +188,8 @@ struct mmc_card {
#define MMC_QUIRK_DISABLE_CD (1<<5) /* disconnect CD/DAT[3] resistor */
#define MMC_QUIRK_INAND_CMD38 (1<<6) /* iNAND devices have broken CMD38 */
#define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */
+#define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid sending 512 bytes in */
+ /* byte mode */
unsigned int erase_size; /* erase size in sectors */
unsigned int erase_shift; /* if erase unit is power 2 */
@@ -377,6 +379,11 @@ static inline int mmc_card_nonstd_func_interface(const struct mmc_card *c)
return c->quirks & MMC_QUIRK_NONSTD_FUNC_IF;
}
+static inline int mmc_card_broken_byte_mode_512(const struct mmc_card *c)
+{
+ return c->quirks & MMC_QUIRK_BROKEN_BYTE_MODE_512;
+}
+
#define mmc_card_name(c) ((c)->cid.prod_name)
#define mmc_card_id(c) (dev_name(&(c)->dev))
--
cgit v1.2.3-70-g09d2
From b2499518b5ad7e28bb3ed348fd3f370eeb1e36c0 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Mon, 29 Aug 2011 16:42:11 +0300
Subject: mmc: core: add eMMC hardware reset support
eMMC's may have a hardware reset line. This patch provides a
host controller operation to implement hardware reset and
a function to reset and reinitialize the card. Also, for MMC,
the reset is always performed before initialization.
The host must set the new host capability MMC_CAP_HW_RESET
to enable hardware reset.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/core/core.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/mmc/core/mmc.c | 4 ++-
include/linux/mmc/card.h | 1 +
include/linux/mmc/core.h | 3 ++
include/linux/mmc/host.h | 2 ++
include/linux/mmc/mmc.h | 4 +++
6 files changed, 107 insertions(+), 1 deletion(-)
(limited to 'include/linux/mmc/card.h')
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 0b4c2ed22bc..da6bd95fa4b 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1776,6 +1776,94 @@ int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
}
EXPORT_SYMBOL(mmc_set_blocklen);
+static void mmc_hw_reset_for_init(struct mmc_host *host)
+{
+ if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
+ return;
+ mmc_host_clk_hold(host);
+ host->ops->hw_reset(host);
+ mmc_host_clk_release(host);
+}
+
+int mmc_can_reset(struct mmc_card *card)
+{
+ u8 rst_n_function;
+
+ if (!mmc_card_mmc(card))
+ return 0;
+ rst_n_function = card->ext_csd.rst_n_function;
+ if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
+ return 0;
+ return 1;
+}
+EXPORT_SYMBOL(mmc_can_reset);
+
+static int mmc_do_hw_reset(struct mmc_host *host, int check)
+{
+ struct mmc_card *card = host->card;
+
+ if (!host->bus_ops->power_restore)
+ return -EOPNOTSUPP;
+
+ if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
+ return -EOPNOTSUPP;
+
+ if (!card)
+ return -EINVAL;
+
+ if (!mmc_can_reset(card))
+ return -EOPNOTSUPP;
+
+ mmc_host_clk_hold(host);
+ mmc_set_clock(host, host->f_init);
+
+ host->ops->hw_reset(host);
+
+ /* If the reset has happened, then a status command will fail */
+ if (check) {
+ struct mmc_command cmd = {0};
+ int err;
+
+ cmd.opcode = MMC_SEND_STATUS;
+ if (!mmc_host_is_spi(card->host))
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (!err) {
+ mmc_host_clk_release(host);
+ return -ENOSYS;
+ }
+ }
+
+ host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_DDR);
+ if (mmc_host_is_spi(host)) {
+ host->ios.chip_select = MMC_CS_HIGH;
+ host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+ } else {
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ }
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
+ host->ios.timing = MMC_TIMING_LEGACY;
+ mmc_set_ios(host);
+
+ mmc_host_clk_release(host);
+
+ return host->bus_ops->power_restore(host);
+}
+
+int mmc_hw_reset(struct mmc_host *host)
+{
+ return mmc_do_hw_reset(host, 0);
+}
+EXPORT_SYMBOL(mmc_hw_reset);
+
+int mmc_hw_reset_check(struct mmc_host *host)
+{
+ return mmc_do_hw_reset(host, 1);
+}
+EXPORT_SYMBOL(mmc_hw_reset_check);
+
static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
{
host->f_init = freq;
@@ -1786,6 +1874,12 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
#endif
mmc_power_up(host);
+ /*
+ * Some eMMCs (with VCCQ always on) may not be reset after power up, so
+ * do a hardware reset if possible.
+ */
+ mmc_hw_reset_for_init(host);
+
/*
* sdio_reset sends CMD52 to reset card. Since we do not know
* if the card is being re-initialized, just send it. CMD52
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index b74e6f14b3a..7adc30da836 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -402,8 +402,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
ext_csd[EXT_CSD_TRIM_MULT];
}
- if (card->ext_csd.rev >= 5)
+ if (card->ext_csd.rev >= 5) {
card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
+ card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
+ }
if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
card->erased_byte = 0xFF;
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 6dfb293326e..5294ddf382a 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -50,6 +50,7 @@ struct mmc_ext_csd {
u8 rel_sectors;
u8 rel_param;
u8 part_config;
+ u8 rst_n_function;
unsigned int part_time; /* Units: ms */
unsigned int sa_timeout; /* Units: 100ns */
unsigned int hs_max_dtr;
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index b8b1b7a311f..56e5625b6f4 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -162,6 +162,9 @@ extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
extern unsigned int mmc_calc_max_discard(struct mmc_card *card);
extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
+extern int mmc_hw_reset(struct mmc_host *host);
+extern int mmc_hw_reset_check(struct mmc_host *host);
+extern int mmc_can_reset(struct mmc_card *card);
extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *);
extern unsigned int mmc_align_data_size(struct mmc_card *, unsigned int);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 340cc0c9409..b2aefea9704 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -151,6 +151,7 @@ struct mmc_host_ops {
int (*execute_tuning)(struct mmc_host *host);
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);
};
struct mmc_card;
@@ -233,6 +234,7 @@ struct mmc_host {
#define MMC_CAP_MAX_CURRENT_600 (1 << 28) /* Host max current limit is 600mA */
#define MMC_CAP_MAX_CURRENT_800 (1 << 29) /* Host max current limit is 800mA */
#define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */
+#define MMC_CAP_HW_RESET (1 << 31) /* Hardware reset */
mmc_pm_flag_t pm_caps; /* supported pm features */
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 5a794cb503e..ed8fca890ee 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -272,6 +272,7 @@ struct _mmc_csd {
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
+#define EXT_CSD_RST_N_FUNCTION 162 /* R/W */
#define EXT_CSD_WR_REL_PARAM 166 /* RO */
#define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */
#define EXT_CSD_PART_CONFIG 179 /* R/W */
@@ -328,6 +329,9 @@ struct _mmc_csd {
#define EXT_CSD_SEC_BD_BLK_EN BIT(2)
#define EXT_CSD_SEC_GB_CL_EN BIT(4)
+#define EXT_CSD_RST_N_EN_MASK 0x3
+#define EXT_CSD_RST_N_ENABLED 1 /* RST_n is enabled on card */
+
/*
* MMC_SWITCH access modes
*/
--
cgit v1.2.3-70-g09d2
From e0c368d571d946ff40f068344b5c2df90c93dd2e Mon Sep 17 00:00:00 2001
From: Namjae Jeon <linkinjeon@gmail.com>
Date: Thu, 6 Oct 2011 23:41:38 +0900
Subject: mmc: core: general purpose MMC partition support.
It allows gerneral purpose partitions in MMC Device. And I try to simply
make mmc_blk_alloc_parts using mmc_part structure suggested by Andrei
Warkentin. After patching, we see general purpose partitions like this:
> cat /proc/partitions
179 0 847872 mmcblk0
179 192 4096 mmcblk0gp3
179 160 4096 mmcblk0gp2
179 128 4096 mmcblk0gp1
179 96 1052672 mmcblk0gp0
179 64 1024 mmcblk0boot1
179 32 1024 mmcblk0boot0
Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Acked-by: Andrei Warkentin <awarkentin@vmware.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/card/block.c | 31 ++++++++++++++++-------------
drivers/mmc/core/mmc.c | 52 ++++++++++++++++++++++++++++++++++++++++++++----
include/linux/mmc/card.h | 34 ++++++++++++++++++++++++++++++-
include/linux/mmc/mmc.h | 5 ++++-
4 files changed, 102 insertions(+), 20 deletions(-)
(limited to 'include/linux/mmc/card.h')
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index aa66d3f3abb..2cf1ba6db91 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1473,26 +1473,29 @@ static int mmc_blk_alloc_part(struct mmc_card *card,
return 0;
}
+/* MMC Physical partitions consist of two boot partitions and
+ * up to four general purpose partitions.
+ * For each partition enabled in EXT_CSD a block device will be allocatedi
+ * to provide access to the partition.
+ */
+
static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
{
- int ret = 0;
+ int idx, ret = 0;
if (!mmc_card_mmc(card))
return 0;
- if (card->ext_csd.boot_size && mmc_boot_partition_access(card->host)) {
- ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0,
- card->ext_csd.boot_size >> 9,
- true,
- "boot0");
- if (ret)
- return ret;
- ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT1,
- card->ext_csd.boot_size >> 9,
- true,
- "boot1");
- if (ret)
- return ret;
+ for (idx = 0; idx < card->nr_parts; idx++) {
+ if (card->part[idx].size) {
+ ret = mmc_blk_alloc_part(card, md,
+ card->part[idx].part_cfg,
+ card->part[idx].size >> 9,
+ card->part[idx].force_ro,
+ card->part[idx].name);
+ if (ret)
+ return ret;
+ }
}
return ret;
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index c632b1faf70..2a4c9a4d3c0 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -239,7 +239,9 @@ static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
*/
static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
{
- int err = 0;
+ int err = 0, idx;
+ unsigned int part_size;
+ u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
BUG_ON(!card);
@@ -340,7 +342,14 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
* There are two boot regions of equal size, defined in
* multiples of 128K.
*/
- card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
+ if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
+ for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
+ 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);
+ }
+ }
}
card->ext_csd.raw_hc_erase_gap_size =
@@ -362,9 +371,9 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
(ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
- u8 hc_erase_grp_sz =
+ hc_erase_grp_sz =
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
- u8 hc_wp_grp_sz =
+ hc_wp_grp_sz =
ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
card->ext_csd.enhanced_area_en = 1;
@@ -393,6 +402,41 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
card->ext_csd.enhanced_area_offset = -EINVAL;
card->ext_csd.enhanced_area_size = -EINVAL;
}
+
+ /*
+ * General purpose partition feature support --
+ * If ext_csd has the size of general purpose partitions,
+ * set size, part_cfg, partition name in mmc_part.
+ */
+ if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
+ EXT_CSD_PART_SUPPORT_PART_EN) {
+ if (card->ext_csd.enhanced_area_en != 1) {
+ hc_erase_grp_sz =
+ ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+ hc_wp_grp_sz =
+ ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+ card->ext_csd.enhanced_area_en = 1;
+ }
+
+ for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
+ if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
+ !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
+ !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
+ continue;
+ part_size =
+ (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
+ << 16) +
+ (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
+ << 8) +
+ ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
+ part_size *= (size_t)(hc_erase_grp_sz *
+ hc_wp_grp_sz);
+ mmc_part_add(card, part_size << 19,
+ EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
+ "gp%d", idx, false);
+ }
+ }
card->ext_csd.sec_trim_mult =
ext_csd[EXT_CSD_SEC_TRIM_MULT];
card->ext_csd.sec_erase_mult =
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 5294ddf382a..92762865f7e 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -12,6 +12,7 @@
#include <linux/mmc/core.h>
#include <linux/mod_devicetable.h>
+#include <linux/genhd.h>
struct mmc_cid {
unsigned int manfid;
@@ -64,7 +65,6 @@ struct mmc_ext_csd {
bool enhanced_area_en; /* enable bit */
unsigned long long enhanced_area_offset; /* Units: Byte */
unsigned int enhanced_area_size; /* Units: KB */
- unsigned int boot_size; /* in bytes */
u8 raw_partition_support; /* 160 */
u8 raw_erased_mem_count; /* 181 */
u8 raw_ext_csd_structure; /* 194 */
@@ -158,6 +158,23 @@ struct sdio_func_tuple;
#define SDIO_MAX_FUNCS 7
+/* The number of MMC physical partitions. These consist of:
+ * boot partitions (2), general purpose partitions (4) in MMC v4.4.
+ */
+#define MMC_NUM_BOOT_PARTITION 2
+#define MMC_NUM_GP_PARTITION 4
+#define MMC_NUM_PHY_PARTITION 6
+
+/*
+ * MMC Physical partitions
+ */
+struct mmc_part {
+ unsigned int size; /* partition size (in bytes) */
+ unsigned int part_cfg; /* partition type */
+ char name[DISK_NAME_LEN];
+ bool force_ro; /* to make boot parts RO by default */
+};
+
/*
* MMC device
*/
@@ -219,8 +236,23 @@ struct mmc_card {
unsigned int sd_bus_speed; /* Bus Speed Mode set for the card */
struct dentry *debugfs_root;
+ struct mmc_part part[MMC_NUM_PHY_PARTITION]; /* physical partitions */
+ unsigned int nr_parts;
};
+/*
+ * 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)
+{
+ 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->nr_parts++;
+}
+
/*
* The world is not perfect and supplies us with broken mmc/sdio devices.
* For at least some of these bugs we need a work-around.
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 50af22730c7..ea558eb44c7 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -270,6 +270,7 @@ struct _mmc_csd {
* EXT_CSD fields
*/
+#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
#define EXT_CSD_RST_N_FUNCTION 162 /* R/W */
@@ -313,7 +314,9 @@ struct _mmc_csd {
#define EXT_CSD_PART_CONFIG_ACC_MASK (0x7)
#define EXT_CSD_PART_CONFIG_ACC_BOOT0 (0x1)
-#define EXT_CSD_PART_CONFIG_ACC_BOOT1 (0x2)
+#define EXT_CSD_PART_CONFIG_ACC_GP0 (0x4)
+
+#define EXT_CSD_PART_SUPPORT_PART_EN (0x1)
#define EXT_CSD_CMD_SET_NORMAL (1<<0)
#define EXT_CSD_CMD_SET_SECURE (1<<1)
--
cgit v1.2.3-70-g09d2
From b23cf0bd55b0c6b703982446f679e00d6d929524 Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Fri, 23 Sep 2011 14:15:29 +0900
Subject: mmc: core: Add default timeout value for CMD6
EXT_CSD[248] includes the default maximum timeout for CMD6.
This field is added at eMMC4.5 Spec. And it can be used for default
timeout except for some operations which don't define the timeout
(i.e. background operation, sanitize, flush cache) in eMMC4.5 Spec.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/core/mmc.c | 16 ++++++++++++----
include/linux/mmc/card.h | 1 +
include/linux/mmc/mmc.h | 1 +
3 files changed, 14 insertions(+), 4 deletions(-)
(limited to 'include/linux/mmc/card.h')
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 2a4c9a4d3c0..7dde373d143 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -458,6 +458,12 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
else
card->erased_byte = 0x0;
+ if (card->ext_csd.rev >= 6)
+ card->ext_csd.generic_cmd6_time = 10 *
+ ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
+ else
+ card->ext_csd.generic_cmd6_time = 0;
+
out:
return err;
}
@@ -801,7 +807,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
*/
if (card->ext_csd.enhanced_area_en) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_ERASE_GROUP_DEF, 1, 0);
+ EXT_CSD_ERASE_GROUP_DEF, 1,
+ card->ext_csd.generic_cmd6_time);
if (err && err != -EBADMSG)
goto free_card;
@@ -844,7 +851,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
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, 0);
+ EXT_CSD_HS_TIMING, 1,
+ card->ext_csd.generic_cmd6_time);
if (err && err != -EBADMSG)
goto free_card;
@@ -924,7 +932,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
ext_csd_bits[idx][0],
- 0);
+ card->ext_csd.generic_cmd6_time);
if (!err) {
mmc_set_bus_width(card->host, bus_width);
@@ -955,7 +963,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
ext_csd_bits[idx][1],
- 0);
+ card->ext_csd.generic_cmd6_time);
}
if (err) {
printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 92762865f7e..2fcd24ccd38 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -54,6 +54,7 @@ struct mmc_ext_csd {
u8 rst_n_function;
unsigned int part_time; /* Units: ms */
unsigned int sa_timeout; /* Units: 100ns */
+ unsigned int generic_cmd6_time; /* Units: 10ms */
unsigned int hs_max_dtr;
unsigned int sectors;
unsigned int card_type;
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index ea558eb44c7..cd63c2dc95c 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -305,6 +305,7 @@ struct _mmc_csd {
#define EXT_CSD_PWR_CL_DDR_52_195 238 /* RO */
#define EXT_CSD_PWR_CL_DDR_52_360 239 /* RO */
#define EXT_CSD_POWER_OFF_LONG_TIME 247 /* RO */
+#define EXT_CSD_GENERIC_CMD6_TIME 248 /* RO */
/*
* EXT_CSD field definitions
--
cgit v1.2.3-70-g09d2
From bec8726abc72bf30d2743a722aa37cd69e7a0580 Mon Sep 17 00:00:00 2001
From: Girish K S <girish.shivananjappa@linaro.org>
Date: Thu, 13 Oct 2011 12:04:16 +0530
Subject: mmc: core: Add Power Off Notify Feature eMMC 4.5
This patch adds support for the power off notify feature, available in
eMMC 4.5 devices. If the host has support for this feature, then the
mmc core will notify the device by setting the POWER_OFF_NOTIFICATION
byte in the extended csd register with a value of 1 (POWER_ON).
For suspend mode short timeout is used, whereas for the normal poweroff
long timeout is used.
Signed-off-by: Girish K S <girish.shivananjappa@linaro.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/core/core.c | 34 ++++++++++++++++++++++++++++++++++
drivers/mmc/core/mmc.c | 23 +++++++++++++++++++++--
drivers/mmc/host/sdhci.c | 9 +++++++++
include/linux/mmc/card.h | 6 ++++++
include/linux/mmc/host.h | 5 +++++
include/linux/mmc/mmc.h | 6 ++++++
6 files changed, 81 insertions(+), 2 deletions(-)
(limited to 'include/linux/mmc/card.h')
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 61d7730bc8b..a3c4e0fe943 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1212,11 +1212,43 @@ static void mmc_power_up(struct mmc_host *host)
void mmc_power_off(struct mmc_host *host)
{
+ struct mmc_card *card;
+ unsigned int notify_type;
+ unsigned int timeout;
+ int err;
+
mmc_host_clk_hold(host);
+ card = host->card;
host->ios.clock = 0;
host->ios.vdd = 0;
+ if (card && mmc_card_mmc(card) &&
+ (card->poweroff_notify_state == MMC_POWERED_ON)) {
+
+ if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) {
+ notify_type = EXT_CSD_POWER_OFF_SHORT;
+ timeout = card->ext_csd.generic_cmd6_time;
+ card->poweroff_notify_state = MMC_POWEROFF_SHORT;
+ } else {
+ notify_type = EXT_CSD_POWER_OFF_LONG;
+ timeout = card->ext_csd.power_off_longtime;
+ card->poweroff_notify_state = MMC_POWEROFF_LONG;
+ }
+
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_POWER_OFF_NOTIFICATION,
+ notify_type, timeout);
+
+ if (err && err != -EBADMSG)
+ pr_err("Device failed to respond within %d poweroff "
+ "time. Forcefully powering down the device\n",
+ timeout);
+
+ /* Set the card state to no notification after the poweroff */
+ card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION;
+ }
+
/*
* Reset ocr mask to be the highest possible voltage supported for
* this mmc host. This value will be used at next power up.
@@ -2208,6 +2240,7 @@ int mmc_pm_notify(struct notifier_block *notify_block,
spin_lock_irqsave(&host->lock, flags);
host->rescan_disable = 1;
+ host->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
spin_unlock_irqrestore(&host->lock, flags);
cancel_delayed_work_sync(&host->detect);
@@ -2231,6 +2264,7 @@ int mmc_pm_notify(struct notifier_block *notify_block,
spin_lock_irqsave(&host->lock, flags);
host->rescan_disable = 0;
+ host->power_notify_type = MMC_HOST_PW_NOTIFY_LONG;
spin_unlock_irqrestore(&host->lock, flags);
mmc_detect_change(host, 0);
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 4e869d371a0..f8ea9387d75 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -458,10 +458,12 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
else
card->erased_byte = 0x0;
- if (card->ext_csd.rev >= 6)
+ if (card->ext_csd.rev >= 6) {
card->ext_csd.generic_cmd6_time = 10 *
ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
- else
+ card->ext_csd.power_off_longtime = 10 *
+ ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
+ } else
card->ext_csd.generic_cmd6_time = 0;
out:
@@ -845,6 +847,23 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
goto free_card;
}
+ /*
+ * If the host supports the power_off_notify capability then
+ * set the notification byte in the ext_csd register of device
+ */
+ if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
+ (card->poweroff_notify_state == MMC_NO_POWER_NOTIFICATION)) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_POWER_OFF_NOTIFICATION,
+ EXT_CSD_POWER_ON,
+ card->ext_csd.generic_cmd6_time);
+ if (err && err != -EBADMSG)
+ goto free_card;
+ }
+
+ if (!err)
+ card->poweroff_notify_state = MMC_POWERED_ON;
+
/*
* Activate high speed (if supported)
*/
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 2cc3ffa7d76..6d8eea32354 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2739,6 +2739,15 @@ int sdhci_add_host(struct sdhci_host *host)
if (caps[1] & SDHCI_DRIVER_TYPE_D)
mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
+ /*
+ * If Power Off Notify capability is enabled by the host,
+ * set notify to short power off notify timeout value.
+ */
+ if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY)
+ mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
+ else
+ mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE;
+
/* Initial value for re-tuning timer count */
host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
SDHCI_RETUNING_TIMER_COUNT_SHIFT;
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 2fcd24ccd38..711c3f8bfab 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -55,6 +55,7 @@ struct mmc_ext_csd {
unsigned int part_time; /* Units: ms */
unsigned int sa_timeout; /* Units: 100ns */
unsigned int generic_cmd6_time; /* Units: 10ms */
+ unsigned int power_off_longtime; /* Units: ms */
unsigned int hs_max_dtr;
unsigned int sectors;
unsigned int card_type;
@@ -209,6 +210,11 @@ struct mmc_card {
#define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */
#define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8) /* Avoid sending 512 bytes in */
/* byte mode */
+ unsigned int poweroff_notify_state; /* eMMC4.5 notify feature */
+#define MMC_NO_POWER_NOTIFICATION 0
+#define MMC_POWERED_ON 1
+#define MMC_POWEROFF_SHORT 2
+#define MMC_POWEROFF_LONG 3
unsigned int erase_size; /* erase size in sectors */
unsigned int erase_shift; /* if erase unit is power 2 */
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index aed5bc7245f..cd10208d9a0 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -239,8 +239,13 @@ struct mmc_host {
unsigned int caps2; /* More host capabilities */
#define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */
+#define MMC_CAP2_POWEROFF_NOTIFY (1 << 2) /* Notify poweroff supported */
mmc_pm_flag_t pm_caps; /* supported pm features */
+ unsigned int power_notify_type;
+#define MMC_HOST_PW_NOTIFY_NONE 0
+#define MMC_HOST_PW_NOTIFY_SHORT 1
+#define MMC_HOST_PW_NOTIFY_LONG 2
#ifdef CONFIG_MMC_CLKGATE
int clk_requests; /* internal reference counter */
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index cd63c2dc95c..02e9e3de960 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -270,6 +270,7 @@ struct _mmc_csd {
* EXT_CSD fields
*/
+#define EXT_CSD_POWER_OFF_NOTIFICATION 34 /* R/W */
#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
@@ -346,6 +347,11 @@ struct _mmc_csd {
#define EXT_CSD_RST_N_EN_MASK 0x3
#define EXT_CSD_RST_N_ENABLED 1 /* RST_n is enabled on card */
+#define EXT_CSD_NO_POWER_NOTIFICATION 0
+#define EXT_CSD_POWER_ON 1
+#define EXT_CSD_POWER_OFF_SHORT 2
+#define EXT_CSD_POWER_OFF_LONG 3
+
#define EXT_CSD_PWR_CL_8BIT_MASK 0xF0 /* 8 bit PWR CLS */
#define EXT_CSD_PWR_CL_4BIT_MASK 0x0F /* 8 bit PWR CLS */
#define EXT_CSD_PWR_CL_8BIT_SHIFT 4
--
cgit v1.2.3-70-g09d2
From b3bf915308ca2b50f3beec6cc824083870f0f4b5 Mon Sep 17 00:00:00 2001
From: Kyungmin Park <kyungmin.park@samsung.com>
Date: Tue, 18 Oct 2011 09:34:04 +0900
Subject: mmc: core: new discard feature support at eMMC v4.5
MMC v4.5 supports the DISCARD feature (CMD38). It's different from
trim and there's no check bit. Currently it's only supported at v4.5.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/card/block.c | 4 +++-
drivers/mmc/core/core.c | 14 ++++++++++++++
drivers/mmc/core/mmc.c | 4 ++++
include/linux/mmc/card.h | 3 +++
include/linux/mmc/core.h | 2 ++
5 files changed, 26 insertions(+), 1 deletion(-)
(limited to 'include/linux/mmc/card.h')
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index e85816e1634..370472797ff 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -756,7 +756,9 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
- if (mmc_can_trim(card))
+ if (mmc_can_discard(card))
+ arg = MMC_DISCARD_ARG;
+ else if (mmc_can_trim(card))
arg = MMC_TRIM_ARG;
else
arg = MMC_ERASE_ARG;
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index d9836e5a4e5..772de2cdfd1 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1709,10 +1709,24 @@ int mmc_can_trim(struct mmc_card *card)
{
if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)
return 1;
+ if (mmc_can_discard(card))
+ return 1;
return 0;
}
EXPORT_SYMBOL(mmc_can_trim);
+int mmc_can_discard(struct mmc_card *card)
+{
+ /*
+ * As there's no way to detect the discard support bit at v4.5
+ * use the s/w feature support filed.
+ */
+ if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_discard);
+
int mmc_can_sanitize(struct mmc_card *card)
{
if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index f8ea9387d75..54088768776 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -452,6 +452,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
}
+ /* eMMC v4.5 or later */
+ if (card->ext_csd.rev >= 6)
+ card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
+
card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
card->erased_byte = 0xFF;
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 711c3f8bfab..55137850878 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -80,6 +80,9 @@ struct mmc_ext_csd {
u8 raw_sec_feature_support;/* 231 */
u8 raw_trim_mult; /* 232 */
u8 raw_sectors[4]; /* 212 - 4 bytes */
+
+ unsigned int feature_support;
+#define MMC_DISCARD_FEATURE BIT(0) /* CMD38 feature */
};
struct sd_scr {
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 9585835cbc4..e918120235b 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -146,6 +146,7 @@ extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
#define MMC_ERASE_ARG 0x00000000
#define MMC_SECURE_ERASE_ARG 0x80000000
#define MMC_TRIM_ARG 0x00000001
+#define MMC_DISCARD_ARG 0x00000003
#define MMC_SECURE_TRIM1_ARG 0x80000001
#define MMC_SECURE_TRIM2_ARG 0x80008000
@@ -156,6 +157,7 @@ extern int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
unsigned int arg);
extern int mmc_can_erase(struct mmc_card *card);
extern int mmc_can_trim(struct mmc_card *card);
+extern int mmc_can_discard(struct mmc_card *card);
extern int mmc_can_sanitize(struct mmc_card *card);
extern int mmc_can_secure_erase_trim(struct mmc_card *card);
extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
--
cgit v1.2.3-70-g09d2
From 881d1c25f765938a95def5afe39486ce39f9fc96 Mon Sep 17 00:00:00 2001
From: Seungwon Jeon <tgih.jun@samsung.com>
Date: Fri, 14 Oct 2011 14:03:21 +0900
Subject: mmc: core: Add cache control for eMMC4.5 device
This patch adds cache feature of eMMC4.5 Spec.
If device supports cache capability, host can utilize some specific
operations.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/card/block.c | 14 ++++++-----
drivers/mmc/core/core.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/mmc/core/mmc.c | 23 ++++++++++++++++++
include/linux/mmc/card.h | 2 ++
include/linux/mmc/core.h | 2 ++
include/linux/mmc/host.h | 3 +++
include/linux/mmc/mmc.h | 3 +++
7 files changed, 104 insertions(+), 6 deletions(-)
(limited to 'include/linux/mmc/card.h')
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 370472797ff..c0cb225bbb4 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -851,16 +851,18 @@ out:
static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
{
struct mmc_blk_data *md = mq->data;
+ struct mmc_card *card = md->queue.card;
+ int ret = 0;
+
+ ret = mmc_flush_cache(card);
+ if (ret)
+ ret = -EIO;
- /*
- * No-op, only service this because we need REQ_FUA for reliable
- * writes.
- */
spin_lock_irq(&md->lock);
- __blk_end_request_all(req, 0);
+ __blk_end_request_all(req, ret);
spin_unlock_irq(&md->lock);
- return 1;
+ return ret ? 0 : 1;
}
/*
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 772de2cdfd1..235bb6a1f97 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2158,6 +2158,65 @@ int mmc_card_can_sleep(struct mmc_host *host)
}
EXPORT_SYMBOL(mmc_card_can_sleep);
+/*
+ * Flush the cache to the non-volatile storage.
+ */
+int mmc_flush_cache(struct mmc_card *card)
+{
+ struct mmc_host *host = card->host;
+ int err = 0;
+
+ if (!(host->caps2 & MMC_CAP2_CACHE_CTRL))
+ return err;
+
+ if (mmc_card_mmc(card) &&
+ (card->ext_csd.cache_size > 0) &&
+ (card->ext_csd.cache_ctrl & 1)) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_FLUSH_CACHE, 1, 0);
+ if (err)
+ pr_err("%s: cache flush error %d\n",
+ mmc_hostname(card->host), err);
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(mmc_flush_cache);
+
+/*
+ * Turn the cache ON/OFF.
+ * Turning the cache OFF shall trigger flushing of the data
+ * to the non-volatile storage.
+ */
+int mmc_cache_ctrl(struct mmc_host *host, u8 enable)
+{
+ struct mmc_card *card = host->card;
+ int err = 0;
+
+ if (!(host->caps2 & MMC_CAP2_CACHE_CTRL) ||
+ mmc_card_is_removable(host))
+ return err;
+
+ if (card && mmc_card_mmc(card) &&
+ (card->ext_csd.cache_size > 0)) {
+ enable = !!enable;
+
+ if (card->ext_csd.cache_ctrl ^ enable)
+ 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;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(mmc_cache_ctrl);
+
#ifdef CONFIG_PM
/**
@@ -2172,6 +2231,9 @@ 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 (err)
+ goto out;
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
@@ -2197,6 +2259,7 @@ int mmc_suspend_host(struct mmc_host *host)
if (!err && !mmc_card_keep_power(host))
mmc_power_off(host);
+out:
return err;
}
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 79390151920..de5900aa81c 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -470,6 +470,12 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
} else
card->ext_csd.generic_cmd6_time = 0;
+ card->ext_csd.cache_size =
+ ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
+ ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
+ ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
+ ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
+
out:
return err;
}
@@ -1020,6 +1026,23 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
}
}
+ /*
+ * If cache size is higher than 0, this indicates
+ * the existence of cache and it can be turned on.
+ */
+ 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);
+ 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 (!oldcard)
host->card = card;
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 55137850878..32492b78aed 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -51,6 +51,7 @@ struct mmc_ext_csd {
u8 rel_sectors;
u8 rel_param;
u8 part_config;
+ u8 cache_ctrl;
u8 rst_n_function;
unsigned int part_time; /* Units: ms */
unsigned int sa_timeout; /* Units: 100ns */
@@ -67,6 +68,7 @@ struct mmc_ext_csd {
bool enhanced_area_en; /* enable bit */
unsigned long long enhanced_area_offset; /* Units: Byte */
unsigned int enhanced_area_size; /* Units: KB */
+ unsigned int cache_size; /* Units: KB */
u8 raw_partition_support; /* 160 */
u8 raw_erased_mem_count; /* 181 */
u8 raw_ext_csd_structure; /* 194 */
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index e918120235b..67bac374d12 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -177,6 +177,8 @@ extern void mmc_release_host(struct mmc_host *host);
extern void mmc_do_release_host(struct mmc_host *host);
extern int mmc_try_claim_host(struct mmc_host *host);
+extern int mmc_flush_cache(struct mmc_card *);
+
/**
* 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 cd10208d9a0..16e9338944e 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -239,6 +239,7 @@ struct mmc_host {
unsigned int caps2; /* More host capabilities */
#define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */
+#define MMC_CAP2_CACHE_CTRL (1 << 1) /* Allow cache control */
#define MMC_CAP2_POWEROFF_NOTIFY (1 << 2) /* Notify poweroff supported */
mmc_pm_flag_t pm_caps; /* supported pm features */
@@ -349,6 +350,8 @@ extern int mmc_power_restore_host(struct mmc_host *host);
extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
+extern int mmc_cache_ctrl(struct mmc_host *, u8);
+
static inline void mmc_signal_sdio_irq(struct mmc_host *host)
{
host->ops->enable_sdio_irq(host, 0);
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 8a05a21fc7c..160e4c5bdae 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -270,6 +270,8 @@ struct _mmc_csd {
* EXT_CSD fields
*/
+#define EXT_CSD_FLUSH_CACHE 32 /* W */
+#define EXT_CSD_CACHE_CTRL 33 /* R/W */
#define EXT_CSD_POWER_OFF_NOTIFICATION 34 /* R/W */
#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
@@ -308,6 +310,7 @@ struct _mmc_csd {
#define EXT_CSD_PWR_CL_DDR_52_360 239 /* RO */
#define EXT_CSD_POWER_OFF_LONG_TIME 247 /* RO */
#define EXT_CSD_GENERIC_CMD6_TIME 248 /* RO */
+#define EXT_CSD_CACHE_SIZE 249 /* RO, 4 bytes */
/*
* EXT_CSD field definitions
--
cgit v1.2.3-70-g09d2
From eb0d8f135b6730d6d0324a064664d121334290e7 Mon Sep 17 00:00:00 2001
From: Jaehoon Chung <jh80.chung@samsung.com>
Date: Tue, 18 Oct 2011 01:26:42 -0400
Subject: mmc: core: support HPI send command
HPI command is defined in eMMC4.41.
This feature is important for eMMC4.5 devices.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
drivers/mmc/core/core.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++
drivers/mmc/core/mmc.c | 31 +++++++++++++++++++++++++
drivers/mmc/core/mmc_ops.c | 31 +++++++++++++++++++++++++
drivers/mmc/core/mmc_ops.h | 1 +
include/linux/mmc/card.h | 4 ++++
include/linux/mmc/core.h | 1 +
include/linux/mmc/mmc.h | 3 +++
7 files changed, 128 insertions(+)
(limited to 'include/linux/mmc/card.h')
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 235bb6a1f97..fe65bb377e2 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -379,6 +379,63 @@ void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
}
EXPORT_SYMBOL(mmc_wait_for_req);
+/**
+ * mmc_interrupt_hpi - Issue for High priority Interrupt
+ * @card: the MMC card associated with the HPI transfer
+ *
+ * Issued High Priority Interrupt, and check for card status
+ * util out-of prg-state.
+ */
+int mmc_interrupt_hpi(struct mmc_card *card)
+{
+ int err;
+ u32 status;
+
+ BUG_ON(!card);
+
+ if (!card->ext_csd.hpi_en) {
+ pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
+ return 1;
+ }
+
+ mmc_claim_host(card->host);
+ err = mmc_send_status(card, &status);
+ if (err) {
+ pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
+ goto out;
+ }
+
+ /*
+ * If the card status is in PRG-state, we can send the HPI command.
+ */
+ if (R1_CURRENT_STATE(status) == R1_STATE_PRG) {
+ do {
+ /*
+ * We don't know when the HPI command will finish
+ * processing, so we need to resend HPI until out
+ * of prg-state, and keep checking the card status
+ * with SEND_STATUS. If a timeout error occurs when
+ * sending the HPI command, we are already out of
+ * prg-state.
+ */
+ err = mmc_send_hpi_cmd(card, &status);
+ if (err)
+ pr_debug("%s: abort HPI (%d error)\n",
+ mmc_hostname(card->host), err);
+
+ err = mmc_send_status(card, &status);
+ if (err)
+ break;
+ } while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
+ } else
+ pr_debug("%s: Left prg-state\n", mmc_hostname(card->host));
+
+out:
+ mmc_release_host(card->host);
+ return err;
+}
+EXPORT_SYMBOL(mmc_interrupt_hpi);
+
/**
* mmc_wait_for_cmd - start a command and wait for completion
* @host: MMC host to start command
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index de5900aa81c..fb5bf01dd1b 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -448,6 +448,21 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
}
if (card->ext_csd.rev >= 5) {
+ /* check whether the eMMC card supports HPI */
+ if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
+ card->ext_csd.hpi = 1;
+ if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
+ card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
+ else
+ card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
+ /*
+ * Indicate the maximum timeout to close
+ * a command interrupted by HPI
+ */
+ card->ext_csd.out_of_int_time =
+ ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
+ }
+
card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
}
@@ -895,6 +910,22 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
}
}
+ /*
+ * Enable HPI feature (if supported)
+ */
+ if (card->ext_csd.hpi) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_HPI_MGMT, 1, 0);
+ if (err && err != -EBADMSG)
+ goto free_card;
+ if (err) {
+ pr_warning("%s: Enabling HPI failed\n",
+ mmc_hostname(card->host));
+ err = 0;
+ } else
+ card->ext_csd.hpi_en = 1;
+ }
+
/*
* Compute bus speed.
*/
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 4e11d56b3f7..007863eea4f 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -547,3 +547,34 @@ int mmc_bus_test(struct mmc_card *card, u8 bus_width)
err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
return err;
}
+
+int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
+{
+ struct mmc_command cmd = {0};
+ unsigned int opcode;
+ unsigned int flags;
+ int err;
+
+ opcode = card->ext_csd.hpi_cmd;
+ if (opcode == MMC_STOP_TRANSMISSION)
+ flags = MMC_RSP_R1 | MMC_CMD_AC;
+ else if (opcode == MMC_SEND_STATUS)
+ flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+ cmd.opcode = opcode;
+ cmd.arg = card->rca << 16 | 1;
+ cmd.flags = flags;
+ cmd.cmd_timeout_ms = card->ext_csd.out_of_int_time;
+
+ err = mmc_wait_for_cmd(card->host, &cmd, 0);
+ if (err) {
+ pr_warn("%s: error %d interrupting operation. "
+ "HPI command response %#x\n", mmc_hostname(card->host),
+ err, cmd.resp[0]);
+ return err;
+ }
+ if (status)
+ *status = cmd.resp[0];
+
+ return 0;
+}
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
index 9276946fa5b..3dd8941c298 100644
--- a/drivers/mmc/core/mmc_ops.h
+++ b/drivers/mmc/core/mmc_ops.h
@@ -26,6 +26,7 @@ int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
int mmc_card_sleepawake(struct mmc_host *host, int sleep);
int mmc_bus_test(struct mmc_card *card, u8 bus_width);
+int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status);
#endif
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 32492b78aed..1684d92a801 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -69,10 +69,14 @@ struct mmc_ext_csd {
unsigned long long enhanced_area_offset; /* Units: Byte */
unsigned int enhanced_area_size; /* Units: KB */
unsigned int cache_size; /* Units: KB */
+ bool hpi_en; /* HPI enablebit */
+ bool hpi; /* HPI support bit */
+ unsigned int hpi_cmd; /* cmd used as HPI */
u8 raw_partition_support; /* 160 */
u8 raw_erased_mem_count; /* 181 */
u8 raw_ext_csd_structure; /* 194 */
u8 raw_card_type; /* 196 */
+ u8 out_of_int_time; /* 198 */
u8 raw_s_a_timeout; /* 217 */
u8 raw_hc_erase_gap_size; /* 221 */
u8 raw_erase_timeout_mult; /* 223 */
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 67bac374d12..174a844a5dd 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -136,6 +136,7 @@ struct mmc_async_req;
extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
struct mmc_async_req *, int *);
+extern int mmc_interrupt_hpi(struct mmc_card *);
extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 160e4c5bdae..0e7135697d1 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -276,6 +276,7 @@ struct _mmc_csd {
#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
+#define EXT_CSD_HPI_MGMT 161 /* R/W */
#define EXT_CSD_RST_N_FUNCTION 162 /* R/W */
#define EXT_CSD_SANITIZE_START 165 /* W */
#define EXT_CSD_WR_REL_PARAM 166 /* RO */
@@ -288,6 +289,7 @@ struct _mmc_csd {
#define EXT_CSD_REV 192 /* RO */
#define EXT_CSD_STRUCTURE 194 /* RO */
#define EXT_CSD_CARD_TYPE 196 /* RO */
+#define EXT_CSD_OUT_OF_INTERRUPT_TIME 198 /* RO */
#define EXT_CSD_PART_SWITCH_TIME 199 /* RO */
#define EXT_CSD_PWR_CL_52_195 200 /* RO */
#define EXT_CSD_PWR_CL_26_195 201 /* RO */
@@ -311,6 +313,7 @@ struct _mmc_csd {
#define EXT_CSD_POWER_OFF_LONG_TIME 247 /* RO */
#define EXT_CSD_GENERIC_CMD6_TIME 248 /* RO */
#define EXT_CSD_CACHE_SIZE 249 /* RO, 4 bytes */
+#define EXT_CSD_HPI_FEATURES 503 /* RO */
/*
* EXT_CSD field definitions
--
cgit v1.2.3-70-g09d2
From a6029e1f75bb484c1f5bc68b6a8572e4024795bc Mon Sep 17 00:00:00 2001
From: Namjae Jeon <linkinjeon@gmail.com>
Date: Thu, 13 Oct 2011 00:43:14 +0900
Subject: mmc: fix compile error when CONFIG_BLOCK is not enabled
'DISK_NAME_LEN' is undeclared when CONFIG_BLOCK is disabled; its use was
introduced via genhd.h by the general purpose partition patch.
To fix, we just add our own MAX_MMC_PART_NAME_LEN macro instead of using
DISK_NAME_LEN.
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Andrei Warkentin <andreiw@vmware.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
---
include/linux/mmc/card.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
(limited to 'include/linux/mmc/card.h')
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 1684d92a801..415f2db414e 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -12,7 +12,6 @@
#include <linux/mmc/core.h>
#include <linux/mod_devicetable.h>
-#include <linux/genhd.h>
struct mmc_cid {
unsigned int manfid;
@@ -175,6 +174,7 @@ struct sdio_func_tuple;
#define MMC_NUM_BOOT_PARTITION 2
#define MMC_NUM_GP_PARTITION 4
#define MMC_NUM_PHY_PARTITION 6
+#define MAX_MMC_PART_NAME_LEN 20
/*
* MMC Physical partitions
@@ -182,7 +182,7 @@ struct sdio_func_tuple;
struct mmc_part {
unsigned int size; /* partition size (in bytes) */
unsigned int part_cfg; /* partition type */
- char name[DISK_NAME_LEN];
+ char name[MAX_MMC_PART_NAME_LEN];
bool force_ro; /* to make boot parts RO by default */
};
--
cgit v1.2.3-70-g09d2