diff options
Diffstat (limited to 'drivers/mmc/mmc.c')
| -rw-r--r-- | drivers/mmc/mmc.c | 83 |
1 files changed, 53 insertions, 30 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index e5fedb39519..37ce6e85a13 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -631,14 +631,12 @@ int mmc_change_freq(struct mmc *mmc) if (mmc->version < MMC_VERSION_4) return 0; - mmc->card_caps |= MMC_MODE_4BIT; - err = mmc_send_ext_csd(mmc, ext_csd); if (err) return err; - cardtype = ext_csd[196] & 0xf; + cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf; err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1); @@ -652,7 +650,7 @@ int mmc_change_freq(struct mmc *mmc) return err; /* No high-speed support */ - if (!ext_csd[185]) + if (!ext_csd[EXT_CSD_HS_TIMING]) return 0; /* High Speed is set, there are two types: 52MHz and 26MHz */ @@ -856,11 +854,12 @@ void mmc_set_bus_width(struct mmc *mmc, uint width) int mmc_startup(struct mmc *mmc) { - int err; + int err, width; uint mult, freq; u64 cmult, csize, capacity; struct mmc_cmd cmd; ALLOC_CACHE_ALIGN_BUFFER(char, ext_csd, 512); + ALLOC_CACHE_ALIGN_BUFFER(char, test_csd, 512); int timeout = 1000; #ifdef CONFIG_MMC_SPI_CRC_ON @@ -989,7 +988,7 @@ int mmc_startup(struct mmc *mmc) /* Select the card, and put it into Transfer Mode */ if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */ cmd.cmdidx = MMC_CMD_SELECT_CARD; - cmd.resp_type = MMC_RSP_R1b; + cmd.resp_type = MMC_RSP_R1; cmd.cmdarg = mmc->rca << 16; cmd.flags = 0; err = mmc_send_cmd(mmc, &cmd, NULL); @@ -1006,14 +1005,16 @@ int mmc_startup(struct mmc *mmc) if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { /* check ext_csd version and capacity */ err = mmc_send_ext_csd(mmc, ext_csd); - if (!err & (ext_csd[192] >= 2)) { + if (!err & (ext_csd[EXT_CSD_REV] >= 2)) { /* * According to the JEDEC Standard, the value of * ext_csd's capacity is valid if the value is more * than 2GB */ - capacity = ext_csd[212] << 0 | ext_csd[213] << 8 | - ext_csd[214] << 16 | ext_csd[215] << 24; + capacity = ext_csd[EXT_CSD_SEC_CNT] << 0 + | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 + | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 + | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; capacity *= 512; if ((capacity >> 20) > 2 * 1024) mmc->capacity = capacity; @@ -1024,8 +1025,9 @@ int mmc_startup(struct mmc *mmc) * group size from ext_csd directly, or calculate * the group size from the csd value. */ - if (ext_csd[175]) - mmc->erase_grp_size = ext_csd[224] * 512 * 1024; + if (ext_csd[EXT_CSD_ERASE_GROUP_DEF]) + mmc->erase_grp_size = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 512 * 1024; else { int erase_gsz, erase_gmul; erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10; @@ -1035,8 +1037,8 @@ int mmc_startup(struct mmc *mmc) } /* store the partition info of emmc */ - if (ext_csd[160] & PART_SUPPORT) - mmc->part_config = ext_csd[179]; + if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) + mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; } if (IS_SD(mmc)) @@ -1077,26 +1079,35 @@ int mmc_startup(struct mmc *mmc) else mmc_set_clock(mmc, 25000000); } else { - if (mmc->card_caps & MMC_MODE_4BIT) { + for (width = EXT_CSD_BUS_WIDTH_8; width >= 0; width--) { /* Set the card to use 4 bit*/ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BUS_WIDTH, - EXT_CSD_BUS_WIDTH_4); - - if (err) - return err; - - mmc_set_bus_width(mmc, 4); - } else if (mmc->card_caps & MMC_MODE_8BIT) { - /* Set the card to use 8 bit*/ - err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BUS_WIDTH, - EXT_CSD_BUS_WIDTH_8); + EXT_CSD_BUS_WIDTH, width); if (err) - return err; + continue; - mmc_set_bus_width(mmc, 8); + if (!width) { + mmc_set_bus_width(mmc, 1); + break; + } else + mmc_set_bus_width(mmc, 4 * width); + + err = mmc_send_ext_csd(mmc, test_csd); + if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] \ + == test_csd[EXT_CSD_PARTITIONING_SUPPORT] + && ext_csd[EXT_CSD_ERASE_GROUP_DEF] \ + == test_csd[EXT_CSD_ERASE_GROUP_DEF] \ + && ext_csd[EXT_CSD_REV] \ + == test_csd[EXT_CSD_REV] + && ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] \ + == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE] + && memcmp(&ext_csd[EXT_CSD_SEC_CNT], \ + &test_csd[EXT_CSD_SEC_CNT], 4) == 0) { + + mmc->card_caps |= width; + break; + } } if (mmc->card_caps & MMC_MODE_HS) { @@ -1179,7 +1190,7 @@ block_dev_desc_t *mmc_get_dev(int dev) int mmc_init(struct mmc *mmc) { - int err; + int err, retry = 3; if (mmc->has_init) return 0; @@ -1202,7 +1213,19 @@ int mmc_init(struct mmc *mmc) mmc->part_num = 0; /* Test for SD version 2 */ - err = mmc_send_if_cond(mmc); + /* + * retry here for 3 times, as for some controller it has dynamic + * clock gating, and only toggle out clk when the first cmd0 send + * out, while some card strictly obey the 74 clocks rule, the interval + * may not be sufficient between the cmd0 and this cmd8, retry to + * fulfil the clock requirement + */ + do { + err = mmc_send_if_cond(mmc); + } while (--retry > 0 && err); + + if (err) + return err; /* Now try to get the SD card's operating condition */ err = sd_send_op_cond(mmc); |