system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-01 08:50:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

mmc: core: Add helper function for EXT_CSD support

Browse source 
The helper function mmc_can_ext_csd() will return a positive value if
the card supports the EXT_CSD register. Start using it at relavant
places in the mmc core.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ulf Hansson 2014-10-20 11:33:53 +02:00
parent a1fc444e83
commit 148bcab28f
3 changed files with 10 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/mmc/core/mmc.c
View file

@ -190,7 +190,7 @@ static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
*new_ext_csd = NULL;
if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
if (!mmc_can_ext_csd(card))
return 0;
/*
@ -852,7 +852,7 @@ static int mmc_select_powerclass(struct mmc_card *card)
int err, ddr;
/* Power class selection is supported for versions >= 4.0 */
if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
if (!mmc_can_ext_csd(card))
return 0;
bus_width = host->ios.bus_width;
@ -913,7 +913,7 @@ static int mmc_select_bus_width(struct mmc_card *card)
unsigned idx, bus_width = 0;
int err = 0;
if ((card->csd.mmca_vsn < CSD_SPEC_VER_4) &&
if (!mmc_can_ext_csd(card) &&
!(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
return 0;
@ -1154,7 +1154,7 @@ static int mmc_select_timing(struct mmc_card *card)
{
int err = 0;
if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
if (!mmc_can_ext_csd(card))
goto bus_speed;
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)

5
drivers/mmc/core/mmc_ops.c
View file

@ -675,3 +675,8 @@ int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
return 0;
}
int mmc_can_ext_csd(struct mmc_card *card)
{
return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
}

1
drivers/mmc/core/mmc_ops.h
View file

@ -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_bus_test(struct mmc_card *card, u8 bus_width);
int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status);
int mmc_can_ext_csd(struct mmc_card *card);
#endif