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mmc: core: Add default timeout value for CMD6

Browse source 
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 <[email protected]>
Signed-off-by: Jaehoon Chung <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
This commit is contained in:
Seungwon Jeon 2011-09-23 14:15:29 +09:00 • committed by Chris Ball
commit b23cf0bd55
3 changed files with 14 additions and 4 deletions
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16
drivers/mmc/core/mmc.c
View file

@ -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 "