diff options
Diffstat (limited to 'drivers/mmc/mmc.c')
| -rw-r--r-- | drivers/mmc/mmc.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index d336a1d65dc..bfca5c176e8 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -495,6 +495,7 @@ static void mmc_decode_cid(struct mmc_card *card) case 2: /* MMC v2.0 - v2.2 */ case 3: /* MMC v3.1 - v3.3 */ + case 4: /* MMC v4 */ card->cid.manfid = UNSTUFF_BITS(resp, 120, 8); card->cid.oemid = UNSTUFF_BITS(resp, 104, 16); card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); @@ -550,6 +551,11 @@ static void mmc_decode_csd(struct mmc_card *card) csd->capacity = (1 + m) << (e + 2); csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); + csd->read_partial = UNSTUFF_BITS(resp, 79, 1); + csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); + csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); + csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); + csd->write_partial = UNSTUFF_BITS(resp, 21, 1); } else { /* * We only understand CSD structure v1.1 and v1.2. @@ -579,6 +585,11 @@ static void mmc_decode_csd(struct mmc_card *card) csd->capacity = (1 + m) << (e + 2); csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4); + csd->read_partial = UNSTUFF_BITS(resp, 79, 1); + csd->write_misalign = UNSTUFF_BITS(resp, 78, 1); + csd->read_misalign = UNSTUFF_BITS(resp, 77, 1); + csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); + csd->write_partial = UNSTUFF_BITS(resp, 21, 1); } } @@ -679,7 +690,15 @@ static void mmc_idle_cards(struct mmc_host *host) } /* - * Apply power to the MMC stack. + * Apply power to the MMC stack. This is a two-stage process. + * First, we enable power to the card without the clock running. + * We then wait a bit for the power to stabilise. Finally, + * enable the bus drivers and clock to the card. + * + * We must _NOT_ enable the clock prior to power stablising. + * + * If a host does all the power sequencing itself, ignore the + * initial MMC_POWER_UP stage. */ static void mmc_power_up(struct mmc_host *host) { @@ -932,8 +951,9 @@ static void mmc_read_scrs(struct mmc_host *host) sg_init_one(&sg, (u8*)card->raw_scr, 8); - err = mmc_wait_for_req(host, &mrq); - if (err != MMC_ERR_NONE) { + mmc_wait_for_req(host, &mrq); + + if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) { mmc_card_set_dead(card); continue; } |