diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2007-06-11 20:25:43 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-09-23 20:12:18 +0200 |
| commit | 35c66c19088bddb11110c124bad8abd4441a8421 (patch) | |
| tree | 54f62d67396b50716945d7ef321097715bcc3365 /drivers/mmc/core | |
| parent | fa64efa1f2a0672767ad0753a6e4bfa4bcc77b87 (diff) | |
sdio: read and decode interesting parts of the CCCR
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 444328581ce..7ce3e3104d2 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -13,6 +13,7 @@ #include <linux/mmc/host.h> #include <linux/mmc/card.h> +#include <linux/mmc/sdio.h> #include <linux/mmc/sdio_func.h> #include "core.h" @@ -39,6 +40,61 @@ static int sdio_init_func(struct mmc_card *card, unsigned int fn) return 0; } +static int sdio_read_cccr(struct mmc_card *card) +{ + int ret; + int cccr_vsn; + unsigned char data; + + memset(&card->cccr, 0, sizeof(struct sdio_cccr)); + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data); + if (ret) + goto out; + + cccr_vsn = data & 0x0f; + + if (cccr_vsn > SDIO_CCCR_REV_1_20) { + printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n", + mmc_hostname(card->host), cccr_vsn); + return -EINVAL; + } + + card->cccr.sdio_vsn = (data & 0xf0) >> 4; + + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data); + if (ret) + goto out; + + if (data & SDIO_CCCR_CAP_SMB) + card->cccr.multi_block = 1; + if (data & SDIO_CCCR_CAP_LSC) + card->cccr.low_speed = 1; + if (data & SDIO_CCCR_CAP_4BLS) + card->cccr.wide_bus = 1; + + if (cccr_vsn >= SDIO_CCCR_REV_1_10) { + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data); + if (ret) + goto out; + + if (data & SDIO_POWER_SMPC) + card->cccr.high_power = 1; + } + + if (cccr_vsn >= SDIO_CCCR_REV_1_20) { + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data); + if (ret) + goto out; + + if (data & SDIO_SPEED_SHS) + card->cccr.high_speed = 1; + } + +out: + return ret; +} + /* * Host is being removed. Free up the current card. */ @@ -181,6 +237,13 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr) goto remove; /* + * Read the common registers. + */ + err = sdio_read_cccr(card); + if (err) + goto remove; + + /* * Initialize (but don't add) all present functions. */ for (i = 0;i < funcs;i++) { |