mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
mmc: core: Bus width testing needs to handle suspend/resume
On reading the ext_csd for the first time (in 1 bit mode), save the
ext_csd information needed for bus width compare.
On every pass we make re-reading the ext_csd, compare the data
against the saved ext_csd data.
This fixes a regression introduced in 3.0-rc1 by 08ee80cc39
("mmc: core: eMMC bus width may not work on all platforms"), which
incorrectly assumed we would be re-reading the ext_csd at resume-
time.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
parent
c31b55cd4e
commit
f39b2dd9d0
2 changed files with 64 additions and 28 deletions
|
@ -247,12 +247,12 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
|
|||
return 0;
|
||||
|
||||
/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
|
||||
card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
|
||||
if (card->csd.structure == 3) {
|
||||
int ext_csd_struct = ext_csd[EXT_CSD_STRUCTURE];
|
||||
if (ext_csd_struct > 2) {
|
||||
if (card->ext_csd.raw_ext_csd_structure > 2) {
|
||||
printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
|
||||
"version %d\n", mmc_hostname(card->host),
|
||||
ext_csd_struct);
|
||||
card->ext_csd.raw_ext_csd_structure);
|
||||
err = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
@ -266,6 +266,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
|
|||
goto out;
|
||||
}
|
||||
|
||||
card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
|
||||
card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
|
||||
card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
|
||||
card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
|
||||
if (card->ext_csd.rev >= 2) {
|
||||
card->ext_csd.sectors =
|
||||
ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
|
||||
|
@ -277,7 +281,7 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
|
|||
if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
|
||||
mmc_card_set_blockaddr(card);
|
||||
}
|
||||
|
||||
card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
|
||||
switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
|
||||
case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
|
||||
EXT_CSD_CARD_TYPE_26:
|
||||
|
@ -307,6 +311,11 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
|
|||
mmc_hostname(card->host));
|
||||
}
|
||||
|
||||
card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
|
||||
card->ext_csd.raw_erase_timeout_mult =
|
||||
ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
|
||||
card->ext_csd.raw_hc_erase_grp_size =
|
||||
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
|
||||
if (card->ext_csd.rev >= 3) {
|
||||
u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
|
||||
card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
|
||||
|
@ -334,6 +343,16 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
|
|||
card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
|
||||
}
|
||||
|
||||
card->ext_csd.raw_hc_erase_gap_size =
|
||||
ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
|
||||
card->ext_csd.raw_sec_trim_mult =
|
||||
ext_csd[EXT_CSD_SEC_TRIM_MULT];
|
||||
card->ext_csd.raw_sec_erase_mult =
|
||||
ext_csd[EXT_CSD_SEC_ERASE_MULT];
|
||||
card->ext_csd.raw_sec_feature_support =
|
||||
ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
|
||||
card->ext_csd.raw_trim_mult =
|
||||
ext_csd[EXT_CSD_TRIM_MULT];
|
||||
if (card->ext_csd.rev >= 4) {
|
||||
/*
|
||||
* Enhanced area feature support -- check whether the eMMC
|
||||
|
@ -341,7 +360,7 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
|
|||
* area offset and size to user by adding sysfs interface.
|
||||
*/
|
||||
if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
|
||||
(ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
|
||||
(ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
|
||||
u8 hc_erase_grp_sz =
|
||||
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
|
||||
u8 hc_wp_grp_sz =
|
||||
|
@ -401,17 +420,17 @@ static inline void mmc_free_ext_csd(u8 *ext_csd)
|
|||
}
|
||||
|
||||
|
||||
static int mmc_compare_ext_csds(struct mmc_card *card, u8 *ext_csd,
|
||||
unsigned bus_width)
|
||||
static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
|
||||
{
|
||||
u8 *bw_ext_csd;
|
||||
int err;
|
||||
|
||||
err = mmc_get_ext_csd(card, &bw_ext_csd);
|
||||
if (err)
|
||||
return err;
|
||||
if (bus_width == MMC_BUS_WIDTH_1)
|
||||
return 0;
|
||||
|
||||
if ((ext_csd == NULL || bw_ext_csd == NULL)) {
|
||||
err = mmc_get_ext_csd(card, &bw_ext_csd);
|
||||
|
||||
if (err || bw_ext_csd == NULL) {
|
||||
if (bus_width != MMC_BUS_WIDTH_1)
|
||||
err = -EINVAL;
|
||||
goto out;
|
||||
|
@ -421,35 +440,40 @@ static int mmc_compare_ext_csds(struct mmc_card *card, u8 *ext_csd,
|
|||
goto out;
|
||||
|
||||
/* only compare read only fields */
|
||||
err = (!(ext_csd[EXT_CSD_PARTITION_SUPPORT] ==
|
||||
err = (!(card->ext_csd.raw_partition_support ==
|
||||
bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
|
||||
(ext_csd[EXT_CSD_ERASED_MEM_CONT] ==
|
||||
(card->ext_csd.raw_erased_mem_count ==
|
||||
bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
|
||||
(ext_csd[EXT_CSD_REV] ==
|
||||
(card->ext_csd.rev ==
|
||||
bw_ext_csd[EXT_CSD_REV]) &&
|
||||
(ext_csd[EXT_CSD_STRUCTURE] ==
|
||||
(card->ext_csd.raw_ext_csd_structure ==
|
||||
bw_ext_csd[EXT_CSD_STRUCTURE]) &&
|
||||
(ext_csd[EXT_CSD_CARD_TYPE] ==
|
||||
(card->ext_csd.raw_card_type ==
|
||||
bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
|
||||
(ext_csd[EXT_CSD_S_A_TIMEOUT] ==
|
||||
(card->ext_csd.raw_s_a_timeout ==
|
||||
bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
|
||||
(ext_csd[EXT_CSD_HC_WP_GRP_SIZE] ==
|
||||
(card->ext_csd.raw_hc_erase_gap_size ==
|
||||
bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
|
||||
(ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT] ==
|
||||
(card->ext_csd.raw_erase_timeout_mult ==
|
||||
bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
|
||||
(ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] ==
|
||||
(card->ext_csd.raw_hc_erase_grp_size ==
|
||||
bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
|
||||
(ext_csd[EXT_CSD_SEC_TRIM_MULT] ==
|
||||
(card->ext_csd.raw_sec_trim_mult ==
|
||||
bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
|
||||
(ext_csd[EXT_CSD_SEC_ERASE_MULT] ==
|
||||
(card->ext_csd.raw_sec_erase_mult ==
|
||||
bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
|
||||
(ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT] ==
|
||||
(card->ext_csd.raw_sec_feature_support ==
|
||||
bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
|
||||
(ext_csd[EXT_CSD_TRIM_MULT] ==
|
||||
(card->ext_csd.raw_trim_mult ==
|
||||
bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
|
||||
memcmp(&ext_csd[EXT_CSD_SEC_CNT],
|
||||
&bw_ext_csd[EXT_CSD_SEC_CNT],
|
||||
4) != 0);
|
||||
(card->ext_csd.raw_sectors[0] ==
|
||||
bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
|
||||
(card->ext_csd.raw_sectors[1] ==
|
||||
bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
|
||||
(card->ext_csd.raw_sectors[2] ==
|
||||
bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
|
||||
(card->ext_csd.raw_sectors[3] ==
|
||||
bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
|
||||
if (err)
|
||||
err = -EINVAL;
|
||||
|
||||
|
@ -770,7 +794,6 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
|
|||
*/
|
||||
if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
|
||||
err = mmc_compare_ext_csds(card,
|
||||
ext_csd,
|
||||
bus_width);
|
||||
else
|
||||
err = mmc_bus_test(card, bus_width);
|
||||
|
|
|
@ -64,6 +64,19 @@ struct mmc_ext_csd {
|
|||
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 */
|
||||
u8 raw_card_type; /* 196 */
|
||||
u8 raw_s_a_timeout; /* 217 */
|
||||
u8 raw_hc_erase_gap_size; /* 221 */
|
||||
u8 raw_erase_timeout_mult; /* 223 */
|
||||
u8 raw_hc_erase_grp_size; /* 224 */
|
||||
u8 raw_sec_trim_mult; /* 229 */
|
||||
u8 raw_sec_erase_mult; /* 230 */
|
||||
u8 raw_sec_feature_support;/* 231 */
|
||||
u8 raw_trim_mult; /* 232 */
|
||||
u8 raw_sectors[4]; /* 212 - 4 bytes */
|
||||
};
|
||||
|
||||
struct sd_scr {
|
||||
|
|
Loading…
Reference in a new issue