From f866a46d6ee86335f60c542e294ec2c01d689eba Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Tue, 11 Jun 2013 15:14:01 -0600 Subject: [PATCH] mmc: report capacity for the selected partition Enhance the MMC core to calculate the size of each MMC partition, and update mmc->capacity whenever a partition is selected. This causes: mmc dev 0 1 ; mmcinfo ... to report the size of the currently selected partition, rather than always reporting the size of the user partition. Signed-off-by: Stephen Warren Signed-off-by: Andy Fleming --- drivers/mmc/mmc.c | 68 ++++++++++++++++++++++++++++++++++++++++++----- include/mmc.h | 7 +++++ 2 files changed, 68 insertions(+), 7 deletions(-) diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index fe83934b92..e6a296a576 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -702,16 +702,49 @@ static int mmc_change_freq(struct mmc *mmc) return 0; } +static int mmc_set_capacity(struct mmc *mmc, int part_num) +{ + switch (part_num) { + case 0: + mmc->capacity = mmc->capacity_user; + break; + case 1: + case 2: + mmc->capacity = mmc->capacity_boot; + break; + case 3: + mmc->capacity = mmc->capacity_rpmb; + break; + case 4: + case 5: + case 6: + case 7: + mmc->capacity = mmc->capacity_gp[part_num - 4]; + break; + default: + return -1; + } + + mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len); + + return 0; +} + int mmc_switch_part(int dev_num, unsigned int part_num) { struct mmc *mmc = find_mmc_device(dev_num); + int ret; if (!mmc) return -1; - return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, - (mmc->part_config & ~PART_ACCESS_MASK) - | (part_num & PART_ACCESS_MASK)); + ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, + (mmc->part_config & ~PART_ACCESS_MASK) + | (part_num & PART_ACCESS_MASK)); + if (ret) + return ret; + + return mmc_set_capacity(mmc, part_num); } int mmc_getcd(struct mmc *mmc) @@ -919,7 +952,7 @@ static void mmc_set_bus_width(struct mmc *mmc, uint width) static int mmc_startup(struct mmc *mmc) { - int err; + int err, i; uint mult, freq; u64 cmult, csize, capacity; struct mmc_cmd cmd; @@ -1037,8 +1070,12 @@ static int mmc_startup(struct mmc *mmc) cmult = (mmc->csd[2] & 0x00038000) >> 15; } - mmc->capacity = (csize + 1) << (cmult + 2); - mmc->capacity *= mmc->read_bl_len; + mmc->capacity_user = (csize + 1) << (cmult + 2); + mmc->capacity_user *= mmc->read_bl_len; + mmc->capacity_boot = 0; + mmc->capacity_rpmb = 0; + for (i = 0; i < 4; i++) + mmc->capacity_gp[i] = 0; if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN) mmc->read_bl_len = MMC_MAX_BLOCK_LEN; @@ -1077,7 +1114,7 @@ static int mmc_startup(struct mmc *mmc) | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; capacity *= MMC_MAX_BLOCK_LEN; if ((capacity >> 20) > 2 * 1024) - mmc->capacity = capacity; + mmc->capacity_user = capacity; } switch (ext_csd[EXT_CSD_REV]) { @@ -1119,8 +1156,25 @@ static int mmc_startup(struct mmc *mmc) if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || ext_csd[EXT_CSD_BOOT_MULT]) mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; + + mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17; + + mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17; + + for (i = 0; i < 4; i++) { + int idx = EXT_CSD_GP_SIZE_MULT + i * 3; + mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) + + (ext_csd[idx + 1] << 8) + ext_csd[idx]; + mmc->capacity_gp[i] *= + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + } } + err = mmc_set_capacity(mmc, mmc->part_num); + if (err) + return err; + if (IS_SD(mmc)) err = sd_change_freq(mmc); else diff --git a/include/mmc.h b/include/mmc.h index 566db59ac9..ea198d87b7 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -158,7 +158,9 @@ /* * EXT_CSD fields */ +#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */ #define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */ +#define EXT_CSD_RPMB_MULT 168 /* RO */ #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ #define EXT_CSD_PART_CONF 179 /* R/W */ #define EXT_CSD_BUS_WIDTH 183 /* R/W */ @@ -166,6 +168,7 @@ #define EXT_CSD_REV 192 /* RO */ #define EXT_CSD_CARD_TYPE 196 /* RO */ #define EXT_CSD_SEC_CNT 212 /* RO, 4 bytes */ +#define EXT_CSD_HC_WP_GRP_SIZE 221 /* RO */ #define EXT_CSD_HC_ERASE_GRP_SIZE 224 /* RO */ #define EXT_CSD_BOOT_MULT 226 /* RO */ @@ -263,6 +266,10 @@ struct mmc { uint write_bl_len; uint erase_grp_size; u64 capacity; + u64 capacity_user; + u64 capacity_boot; + u64 capacity_rpmb; + u64 capacity_gp[4]; block_dev_desc_t block_dev; int (*send_cmd)(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data); -- 2.39.5