--- zzzz-none-000/linux-3.10.107/drivers/mmc/core/mmc.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/mmc/core/mmc.c 2021-02-04 17:41:59.000000000 +0000 @@ -11,14 +11,17 @@ */ #include +#include #include #include +#include #include #include #include #include "core.h" +#include "host.h" #include "bus.h" #include "mmc_ops.h" #include "sd_ops.h" @@ -161,6 +164,7 @@ 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->dsr_imp = UNSTUFF_BITS(resp, 76, 1); csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3); csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4); csd->write_partial = UNSTUFF_BITS(resp, 21, 1); @@ -175,95 +179,158 @@ return 0; } -/* - * Read extended CSD. - */ -static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd) +static void mmc_select_card_type(struct mmc_card *card) { - int err; - u8 *ext_csd; + struct mmc_host *host = card->host; + u8 card_type = card->ext_csd.raw_card_type; + u32 caps = host->caps, caps2 = host->caps2; + unsigned int hs_max_dtr = 0, hs200_max_dtr = 0; + unsigned int avail_type = 0; - BUG_ON(!card); - BUG_ON(!new_ext_csd); + if (caps & MMC_CAP_MMC_HIGHSPEED && + card_type & EXT_CSD_CARD_TYPE_HS_26) { + hs_max_dtr = MMC_HIGH_26_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_HS_26; + } - *new_ext_csd = NULL; + if (caps & MMC_CAP_MMC_HIGHSPEED && + card_type & EXT_CSD_CARD_TYPE_HS_52) { + hs_max_dtr = MMC_HIGH_52_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_HS_52; + } - if (card->csd.mmca_vsn < CSD_SPEC_VER_4) - return 0; + if (caps & MMC_CAP_1_8V_DDR && + card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) { + hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V; + } - /* - * As the ext_csd is so large and mostly unused, we don't store the - * raw block in mmc_card. - */ - ext_csd = kmalloc(512, GFP_KERNEL); - if (!ext_csd) { - pr_err("%s: could not allocate a buffer to " - "receive the ext_csd.\n", mmc_hostname(card->host)); - return -ENOMEM; + if (caps & MMC_CAP_1_2V_DDR && + card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { + hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V; } - err = mmc_send_ext_csd(card, ext_csd); - if (err) { - kfree(ext_csd); - *new_ext_csd = NULL; + if (caps2 & MMC_CAP2_HS200_1_8V_SDR && + card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) { + hs200_max_dtr = MMC_HS200_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V; + } - /* If the host or the card can't do the switch, - * fail more gracefully. */ - if ((err != -EINVAL) - && (err != -ENOSYS) - && (err != -EFAULT)) - return err; + if (caps2 & MMC_CAP2_HS200_1_2V_SDR && + card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) { + hs200_max_dtr = MMC_HS200_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V; + } - /* - * High capacity cards should have this "magic" size - * stored in their CSD. - */ - if (card->csd.capacity == (4096 * 512)) { - pr_err("%s: unable to read EXT_CSD " - "on a possible high capacity card. " - "Card will be ignored.\n", - mmc_hostname(card->host)); - } else { - pr_warning("%s: unable to read " - "EXT_CSD, performance might " - "suffer.\n", - mmc_hostname(card->host)); - err = 0; - } - } else - *new_ext_csd = ext_csd; + if (caps2 & MMC_CAP2_HS400_1_8V && + card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) { + hs200_max_dtr = MMC_HS200_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V; + } - return err; + if (caps2 & MMC_CAP2_HS400_1_2V && + card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) { + hs200_max_dtr = MMC_HS200_MAX_DTR; + avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V; + } + + card->ext_csd.hs_max_dtr = hs_max_dtr; + card->ext_csd.hs200_max_dtr = hs200_max_dtr; + card->mmc_avail_type = avail_type; } -static void mmc_select_card_type(struct mmc_card *card) +static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) { - struct mmc_host *host = card->host; - u8 card_type = card->ext_csd.raw_card_type & EXT_CSD_CARD_TYPE_MASK; - u32 caps = host->caps, caps2 = host->caps2; - unsigned int hs_max_dtr = 0; + u8 hc_erase_grp_sz, hc_wp_grp_sz; - if (card_type & EXT_CSD_CARD_TYPE_26) - hs_max_dtr = MMC_HIGH_26_MAX_DTR; + /* + * Disable these attributes by default + */ + card->ext_csd.enhanced_area_offset = -EINVAL; + card->ext_csd.enhanced_area_size = -EINVAL; - if (caps & MMC_CAP_MMC_HIGHSPEED && - card_type & EXT_CSD_CARD_TYPE_52) - hs_max_dtr = MMC_HIGH_52_MAX_DTR; + /* + * Enhanced area feature support -- check whether the eMMC + * card has the Enhanced area enabled. If so, export enhanced + * area offset and size to user by adding sysfs interface. + */ + if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && + (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { + if (card->ext_csd.partition_setting_completed) { + hc_erase_grp_sz = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + hc_wp_grp_sz = + ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; - if ((caps & MMC_CAP_1_8V_DDR && - card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) || - (caps & MMC_CAP_1_2V_DDR && - card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)) - hs_max_dtr = MMC_HIGH_DDR_MAX_DTR; + /* + * calculate the enhanced data area offset, in bytes + */ + card->ext_csd.enhanced_area_offset = + (((unsigned long long)ext_csd[139]) << 24) + + (((unsigned long long)ext_csd[138]) << 16) + + (((unsigned long long)ext_csd[137]) << 8) + + (((unsigned long long)ext_csd[136])); + if (mmc_card_blockaddr(card)) + card->ext_csd.enhanced_area_offset <<= 9; + /* + * calculate the enhanced data area size, in kilobytes + */ + card->ext_csd.enhanced_area_size = + (ext_csd[142] << 16) + (ext_csd[141] << 8) + + ext_csd[140]; + card->ext_csd.enhanced_area_size *= + (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); + card->ext_csd.enhanced_area_size <<= 9; + } else { + pr_warn("%s: defines enhanced area without partition setting complete\n", + mmc_hostname(card->host)); + } + } +} - if ((caps2 & MMC_CAP2_HS200_1_8V_SDR && - card_type & EXT_CSD_CARD_TYPE_SDR_1_8V) || - (caps2 & MMC_CAP2_HS200_1_2V_SDR && - card_type & EXT_CSD_CARD_TYPE_SDR_1_2V)) - hs_max_dtr = MMC_HS200_MAX_DTR; +static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) +{ + int idx; + u8 hc_erase_grp_sz, hc_wp_grp_sz; + unsigned int part_size; - card->ext_csd.hs_max_dtr = hs_max_dtr; - card->ext_csd.card_type = card_type; + /* + * General purpose partition feature support -- + * If ext_csd has the size of general purpose partitions, + * set size, part_cfg, partition name in mmc_part. + */ + if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & + EXT_CSD_PART_SUPPORT_PART_EN) { + hc_erase_grp_sz = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + hc_wp_grp_sz = + ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + + for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { + if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && + !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && + !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) + continue; + if (card->ext_csd.partition_setting_completed == 0) { + pr_warn("%s: has partition size defined without partition complete\n", + mmc_hostname(card->host)); + break; + } + part_size = + (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] + << 16) + + (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] + << 8) + + ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; + part_size *= (size_t)(hc_erase_grp_sz * + hc_wp_grp_sz); + mmc_part_add(card, part_size << 19, + EXT_CSD_PART_CONFIG_ACC_GP0 + idx, + "gp%d", idx, false, + MMC_BLK_DATA_AREA_GP); + } + } } /* Minimum partition switch timeout in milliseconds */ @@ -272,16 +339,12 @@ /* * Decode extended CSD. */ -static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) +static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) { int err = 0, idx; unsigned int part_size; - u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0; - - BUG_ON(!card); - - if (!ext_csd) - return 0; + struct device_node *np; + bool broken_hpi = false; /* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */ card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE]; @@ -295,13 +358,17 @@ } } + np = mmc_of_find_child_device(card->host, 0); + if (np && of_device_is_compatible(np, "mmc-card")) + broken_hpi = of_property_read_bool(np, "broken-hpi"); + of_node_put(np); + + /* + * The EXT_CSD format is meant to be forward compatible. As long + * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV + * are authorized, see JEDEC JESD84-B50 section B.8. + */ card->ext_csd.rev = ext_csd[EXT_CSD_REV]; - if (card->ext_csd.rev > 6) { - pr_err("%s: unrecognised EXT_CSD revision %d\n", - mmc_hostname(card->host), card->ext_csd.rev); - err = -EINVAL; - goto out; - } card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; @@ -377,81 +444,18 @@ card->ext_csd.raw_trim_mult = ext_csd[EXT_CSD_TRIM_MULT]; card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; + card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; if (card->ext_csd.rev >= 4) { - /* - * Enhanced area feature support -- check whether the eMMC - * card has the Enhanced area enabled. If so, export enhanced - * area offset and size to user by adding sysfs interface. - */ - if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && - (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { - hc_erase_grp_sz = - ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; - hc_wp_grp_sz = - ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; - - card->ext_csd.enhanced_area_en = 1; - /* - * calculate the enhanced data area offset, in bytes - */ - card->ext_csd.enhanced_area_offset = - (ext_csd[139] << 24) + (ext_csd[138] << 16) + - (ext_csd[137] << 8) + ext_csd[136]; - if (mmc_card_blockaddr(card)) - card->ext_csd.enhanced_area_offset <<= 9; - /* - * calculate the enhanced data area size, in kilobytes - */ - card->ext_csd.enhanced_area_size = - (ext_csd[142] << 16) + (ext_csd[141] << 8) + - ext_csd[140]; - card->ext_csd.enhanced_area_size *= - (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); - card->ext_csd.enhanced_area_size <<= 9; - } else { - /* - * If the enhanced area is not enabled, disable these - * device attributes. - */ - card->ext_csd.enhanced_area_offset = -EINVAL; - card->ext_csd.enhanced_area_size = -EINVAL; - } + if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & + EXT_CSD_PART_SETTING_COMPLETED) + card->ext_csd.partition_setting_completed = 1; + else + card->ext_csd.partition_setting_completed = 0; - /* - * General purpose partition feature support -- - * If ext_csd has the size of general purpose partitions, - * set size, part_cfg, partition name in mmc_part. - */ - if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & - EXT_CSD_PART_SUPPORT_PART_EN) { - if (card->ext_csd.enhanced_area_en != 1) { - hc_erase_grp_sz = - ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; - hc_wp_grp_sz = - ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + mmc_manage_enhanced_area(card, ext_csd); - card->ext_csd.enhanced_area_en = 1; - } + mmc_manage_gp_partitions(card, ext_csd); - for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { - if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && - !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && - !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) - continue; - part_size = - (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] - << 16) + - (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] - << 8) + - ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; - part_size *= (size_t)(hc_erase_grp_sz * - hc_wp_grp_sz); - mmc_part_add(card, part_size << 19, - EXT_CSD_PART_CONFIG_ACC_GP0 + idx, - "gp%d", idx, false, - MMC_BLK_DATA_AREA_GP); - } - } card->ext_csd.sec_trim_mult = ext_csd[EXT_CSD_SEC_TRIM_MULT]; card->ext_csd.sec_erase_mult = @@ -468,22 +472,48 @@ */ card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP]; card->ext_csd.boot_ro_lockable = true; + + /* Save power class values */ + card->ext_csd.raw_pwr_cl_52_195 = + ext_csd[EXT_CSD_PWR_CL_52_195]; + card->ext_csd.raw_pwr_cl_26_195 = + ext_csd[EXT_CSD_PWR_CL_26_195]; + card->ext_csd.raw_pwr_cl_52_360 = + ext_csd[EXT_CSD_PWR_CL_52_360]; + card->ext_csd.raw_pwr_cl_26_360 = + ext_csd[EXT_CSD_PWR_CL_26_360]; + card->ext_csd.raw_pwr_cl_200_195 = + ext_csd[EXT_CSD_PWR_CL_200_195]; + card->ext_csd.raw_pwr_cl_200_360 = + ext_csd[EXT_CSD_PWR_CL_200_360]; + card->ext_csd.raw_pwr_cl_ddr_52_195 = + ext_csd[EXT_CSD_PWR_CL_DDR_52_195]; + card->ext_csd.raw_pwr_cl_ddr_52_360 = + ext_csd[EXT_CSD_PWR_CL_DDR_52_360]; + card->ext_csd.raw_pwr_cl_ddr_200_360 = + ext_csd[EXT_CSD_PWR_CL_DDR_200_360]; } if (card->ext_csd.rev >= 5) { + /* Adjust production date as per JEDEC JESD84-B451 */ + if (card->cid.year < 2010) + card->cid.year += 16; + /* check whether the eMMC card supports BKOPS */ if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { card->ext_csd.bkops = 1; - card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN]; + card->ext_csd.man_bkops_en = + (ext_csd[EXT_CSD_BKOPS_EN] & + EXT_CSD_MANUAL_BKOPS_MASK); card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; - if (!card->ext_csd.bkops_en) - pr_info("%s: BKOPS_EN bit is not set\n", + if (!card->ext_csd.man_bkops_en) + pr_info("%s: MAN_BKOPS_EN bit is not set\n", mmc_hostname(card->host)); } /* check whether the eMMC card supports HPI */ - if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) { + if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) { card->ext_csd.hpi = 1; if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2) card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION; @@ -555,16 +585,64 @@ card->ext_csd.data_sector_size = 512; } + if (card->ext_csd.rev >= 7) { + /* Enhance Strobe is supported since v5.1 which rev should be + * 8 but some eMMC devices can support it with rev 7. So handle + * Enhance Strobe here. + */ + card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT]; + } + + /* eMMC v5 or later */ + if (card->ext_csd.rev >= 7) { + memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION], + MMC_FIRMWARE_LEN); + card->ext_csd.ffu_capable = + (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && + !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); + } out: return err; } -static inline void mmc_free_ext_csd(u8 *ext_csd) +static int mmc_read_ext_csd(struct mmc_card *card) { + u8 *ext_csd; + int err; + + if (!mmc_can_ext_csd(card)) + return 0; + + err = mmc_get_ext_csd(card, &ext_csd); + if (err) { + /* If the host or the card can't do the switch, + * fail more gracefully. */ + if ((err != -EINVAL) + && (err != -ENOSYS) + && (err != -EFAULT)) + return err; + + /* + * High capacity cards should have this "magic" size + * stored in their CSD. + */ + if (card->csd.capacity == (4096 * 512)) { + pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n", + mmc_hostname(card->host)); + } else { + pr_warn("%s: unable to read EXT_CSD, performance might suffer\n", + mmc_hostname(card->host)); + err = 0; + } + + return err; + } + + err = mmc_decode_ext_csd(card, ext_csd); kfree(ext_csd); + return err; } - static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width) { u8 *bw_ext_csd; @@ -574,11 +652,8 @@ return 0; err = mmc_get_ext_csd(card, &bw_ext_csd); - - if (err || bw_ext_csd == NULL) { - err = -EINVAL; - goto out; - } + if (err) + return err; /* only compare read only fields */ err = !((card->ext_csd.raw_partition_support == @@ -614,12 +689,30 @@ (card->ext_csd.raw_sectors[2] == bw_ext_csd[EXT_CSD_SEC_CNT + 2]) && (card->ext_csd.raw_sectors[3] == - bw_ext_csd[EXT_CSD_SEC_CNT + 3])); + bw_ext_csd[EXT_CSD_SEC_CNT + 3]) && + (card->ext_csd.raw_pwr_cl_52_195 == + bw_ext_csd[EXT_CSD_PWR_CL_52_195]) && + (card->ext_csd.raw_pwr_cl_26_195 == + bw_ext_csd[EXT_CSD_PWR_CL_26_195]) && + (card->ext_csd.raw_pwr_cl_52_360 == + bw_ext_csd[EXT_CSD_PWR_CL_52_360]) && + (card->ext_csd.raw_pwr_cl_26_360 == + bw_ext_csd[EXT_CSD_PWR_CL_26_360]) && + (card->ext_csd.raw_pwr_cl_200_195 == + bw_ext_csd[EXT_CSD_PWR_CL_200_195]) && + (card->ext_csd.raw_pwr_cl_200_360 == + bw_ext_csd[EXT_CSD_PWR_CL_200_360]) && + (card->ext_csd.raw_pwr_cl_ddr_52_195 == + bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) && + (card->ext_csd.raw_pwr_cl_ddr_52_360 == + bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) && + (card->ext_csd.raw_pwr_cl_ddr_200_360 == + bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360])); + if (err) err = -EINVAL; -out: - mmc_free_ext_csd(bw_ext_csd); + kfree(bw_ext_csd); return err; } @@ -630,7 +723,7 @@ MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); -MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev); +MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); @@ -643,6 +736,22 @@ MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); +static ssize_t mmc_fwrev_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + + if (card->ext_csd.rev < 7) { + return sprintf(buf, "0x%x\n", card->cid.fwrev); + } else { + return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN, + card->ext_csd.fwrev); + } +} + +static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL); + static struct attribute *mmc_std_attrs[] = { &dev_attr_cid.attr, &dev_attr_csd.attr, @@ -650,6 +759,7 @@ &dev_attr_erase_size.attr, &dev_attr_preferred_erase_size.attr, &dev_attr_fwrev.attr, + &dev_attr_ffu_capable.attr, &dev_attr_hwrev.attr, &dev_attr_manfid.attr, &dev_attr_name.attr, @@ -662,18 +772,10 @@ &dev_attr_rel_sectors.attr, NULL, }; - -static struct attribute_group mmc_std_attr_group = { - .attrs = mmc_std_attrs, -}; - -static const struct attribute_group *mmc_attr_groups[] = { - &mmc_std_attr_group, - NULL, -}; +ATTRIBUTE_GROUPS(mmc_std); static struct device_type mmc_type = { - .groups = mmc_attr_groups, + .groups = mmc_std_groups, }; /* @@ -682,40 +784,24 @@ * extended CSD register, select it by executing the * mmc_switch command. */ -static int mmc_select_powerclass(struct mmc_card *card, - unsigned int bus_width, u8 *ext_csd) +static int __mmc_select_powerclass(struct mmc_card *card, + unsigned int bus_width) { + struct mmc_host *host = card->host; + struct mmc_ext_csd *ext_csd = &card->ext_csd; + unsigned int pwrclass_val = 0; int err = 0; - unsigned int pwrclass_val; - unsigned int index = 0; - struct mmc_host *host; - - BUG_ON(!card); - - host = card->host; - BUG_ON(!host); - - if (ext_csd == NULL) - return 0; - - /* Power class selection is supported for versions >= 4.0 */ - if (card->csd.mmca_vsn < CSD_SPEC_VER_4) - return 0; - - /* Power class values are defined only for 4/8 bit bus */ - if (bus_width == EXT_CSD_BUS_WIDTH_1) - return 0; switch (1 << host->ios.vdd) { case MMC_VDD_165_195: - if (host->ios.clock <= 26000000) - index = EXT_CSD_PWR_CL_26_195; - else if (host->ios.clock <= 52000000) - index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? - EXT_CSD_PWR_CL_52_195 : - EXT_CSD_PWR_CL_DDR_52_195; - else if (host->ios.clock <= 200000000) - index = EXT_CSD_PWR_CL_200_195; + if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) + pwrclass_val = ext_csd->raw_pwr_cl_26_195; + else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) + pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? + ext_csd->raw_pwr_cl_52_195 : + ext_csd->raw_pwr_cl_ddr_52_195; + else if (host->ios.clock <= MMC_HS200_MAX_DTR) + pwrclass_val = ext_csd->raw_pwr_cl_200_195; break; case MMC_VDD_27_28: case MMC_VDD_28_29: @@ -726,23 +812,23 @@ case MMC_VDD_33_34: case MMC_VDD_34_35: case MMC_VDD_35_36: - if (host->ios.clock <= 26000000) - index = EXT_CSD_PWR_CL_26_360; - else if (host->ios.clock <= 52000000) - index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? - EXT_CSD_PWR_CL_52_360 : - EXT_CSD_PWR_CL_DDR_52_360; - else if (host->ios.clock <= 200000000) - index = EXT_CSD_PWR_CL_200_360; + if (host->ios.clock <= MMC_HIGH_26_MAX_DTR) + pwrclass_val = ext_csd->raw_pwr_cl_26_360; + else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR) + pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ? + ext_csd->raw_pwr_cl_52_360 : + ext_csd->raw_pwr_cl_ddr_52_360; + else if (host->ios.clock <= MMC_HS200_MAX_DTR) + pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ? + ext_csd->raw_pwr_cl_ddr_200_360 : + ext_csd->raw_pwr_cl_200_360; break; default: - pr_warning("%s: Voltage range not supported " - "for power class.\n", mmc_hostname(host)); + pr_warn("%s: Voltage range not supported for power class\n", + mmc_hostname(host)); return -EINVAL; } - pwrclass_val = ext_csd[index]; - if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8)) pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >> EXT_CSD_PWR_CL_8BIT_SHIFT; @@ -761,40 +847,79 @@ return err; } +static int mmc_select_powerclass(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + u32 bus_width, ext_csd_bits; + int err, ddr; + + /* Power class selection is supported for versions >= 4.0 */ + if (!mmc_can_ext_csd(card)) + return 0; + + bus_width = host->ios.bus_width; + /* Power class values are defined only for 4/8 bit bus */ + if (bus_width == MMC_BUS_WIDTH_1) + return 0; + + ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52; + if (ddr) + ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? + EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; + else + ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? + EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; + + err = __mmc_select_powerclass(card, ext_csd_bits); + if (err) + pr_warn("%s: power class selection to bus width %d ddr %d failed\n", + mmc_hostname(host), 1 << bus_width, ddr); + + return err; +} + /* - * Selects the desired buswidth and switch to the HS200 mode - * if bus width set without error + * Set the bus speed for the selected speed mode. */ -static int mmc_select_hs200(struct mmc_card *card) +static void mmc_set_bus_speed(struct mmc_card *card) +{ + unsigned int max_dtr = (unsigned int)-1; + + if ((mmc_card_hs200(card) || mmc_card_hs400(card)) && + max_dtr > card->ext_csd.hs200_max_dtr) + max_dtr = card->ext_csd.hs200_max_dtr; + else if (mmc_card_hs(card) && max_dtr > card->ext_csd.hs_max_dtr) + max_dtr = card->ext_csd.hs_max_dtr; + else if (max_dtr > card->csd.max_dtr) + max_dtr = card->csd.max_dtr; + + mmc_set_clock(card->host, max_dtr); +} + +/* + * Select the bus width amoung 4-bit and 8-bit(SDR). + * If the bus width is changed successfully, return the selected width value. + * Zero is returned instead of error value if the wide width is not supported. + */ +static int mmc_select_bus_width(struct mmc_card *card) { - int idx, err = -EINVAL; - struct mmc_host *host; static unsigned ext_csd_bits[] = { - EXT_CSD_BUS_WIDTH_4, EXT_CSD_BUS_WIDTH_8, + EXT_CSD_BUS_WIDTH_4, }; static unsigned bus_widths[] = { - MMC_BUS_WIDTH_4, MMC_BUS_WIDTH_8, + MMC_BUS_WIDTH_4, }; + struct mmc_host *host = card->host; + unsigned idx, bus_width = 0; + int err = 0; - BUG_ON(!card); - - host = card->host; - - if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V && - host->caps2 & MMC_CAP2_HS200_1_2V_SDR) - err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); - - if (err && card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_8V && - host->caps2 & MMC_CAP2_HS200_1_8V_SDR) - err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); - - /* If fails try again during next card power cycle */ - if (err) - goto err; + if (!mmc_can_ext_csd(card) || + !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) + return 0; - idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0; + idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1; /* * Unlike SD, MMC cards dont have a configuration register to notify @@ -802,8 +927,7 @@ * the supported bus width or compare the ext csd values of current * bus width and ext csd values of 1 bit mode read earlier. */ - for (; idx >= 0; idx--) { - + for (; idx < ARRAY_SIZE(bus_widths); idx++) { /* * Host is capable of 8bit transfer, then switch * the device to work in 8bit transfer mode. If the @@ -818,25 +942,473 @@ if (err) continue; - mmc_set_bus_width(card->host, bus_widths[idx]); + bus_width = bus_widths[idx]; + mmc_set_bus_width(host, bus_width); + /* + * If controller can't handle bus width test, + * compare ext_csd previously read in 1 bit mode + * against ext_csd at new bus width + */ if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) - err = mmc_compare_ext_csds(card, bus_widths[idx]); + err = mmc_compare_ext_csds(card, bus_width); else - err = mmc_bus_test(card, bus_widths[idx]); - if (!err) + err = mmc_bus_test(card, bus_width); + + if (!err) { + err = bus_width; break; + } else { + pr_warn("%s: switch to bus width %d failed\n", + mmc_hostname(host), ext_csd_bits[idx]); + } } - /* switch to HS200 mode if bus width set successfully */ + return err; +} + +/* + * Switch to the high-speed mode + */ +static int mmc_select_hs(struct mmc_card *card) +{ + int err; + + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, + card->ext_csd.generic_cmd6_time, + true, true, true); if (!err) - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_HS_TIMING, 2, 0); + mmc_set_timing(card->host, MMC_TIMING_MMC_HS); + + return err; +} + +/* + * Activate wide bus and DDR if supported. + */ +static int mmc_select_hs_ddr(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + u32 bus_width, ext_csd_bits; + int err = 0; + + if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52)) + return 0; + + bus_width = host->ios.bus_width; + if (bus_width == MMC_BUS_WIDTH_1) + return 0; + + ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? + EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4; + + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BUS_WIDTH, + ext_csd_bits, + card->ext_csd.generic_cmd6_time); + if (err) { + pr_err("%s: switch to bus width %d ddr failed\n", + mmc_hostname(host), 1 << bus_width); + return err; + } + + /* + * eMMC cards can support 3.3V to 1.2V i/o (vccq) + * signaling. + * + * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. + * + * 1.8V vccq at 3.3V core voltage (vcc) is not required + * in the JEDEC spec for DDR. + * + * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all + * host controller can support this, like some of the SDHCI + * controller which connect to an eMMC device. Some of these + * host controller still needs to use 1.8v vccq for supporting + * DDR mode. + * + * So the sequence will be: + * if (host and device can both support 1.2v IO) + * use 1.2v IO; + * else if (host and device can both support 1.8v IO) + * use 1.8v IO; + * so if host and device can only support 3.3v IO, this is the + * last choice. + * + * WARNING: eMMC rules are NOT the same as SD DDR + */ + err = -EINVAL; + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) + err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); + + if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V)) + err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); + + /* make sure vccq is 3.3v after switching disaster */ + if (err) + err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); + + if (!err) + mmc_set_timing(host, MMC_TIMING_MMC_DDR52); + + return err; +} + +/* Caller must hold re-tuning */ +static int mmc_switch_status(struct mmc_card *card) +{ + u32 status; + int err; + + err = mmc_send_status(card, &status); + if (err) + return err; + + return mmc_switch_status_error(card->host, status); +} + +static int mmc_select_hs400(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + bool send_status = true; + unsigned int max_dtr; + int err = 0; + u8 val; + + /* + * HS400 mode requires 8-bit bus width + */ + if (card->ext_csd.strobe_support) { + if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && + host->caps & MMC_CAP_8_BIT_DATA)) + return 0; + + /* For Enhance Strobe flow. For non Enhance Strobe, signal + * voltage will not be set. + */ + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) + err = __mmc_set_signal_voltage(host, + MMC_SIGNAL_VOLTAGE_120); + + if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) + err = __mmc_set_signal_voltage(host, + MMC_SIGNAL_VOLTAGE_180); + if (err) + return err; + } else { + if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && + host->ios.bus_width == MMC_BUS_WIDTH_8)) + return 0; + } + + if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) + send_status = false; + + /* Reduce frequency to HS frequency */ + max_dtr = card->ext_csd.hs_max_dtr; + mmc_set_clock(host, max_dtr); + + /* Switch card to HS mode */ + val = EXT_CSD_TIMING_HS; + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_HS_TIMING, val, + card->ext_csd.generic_cmd6_time, + true, send_status, true); + if (err) { + pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", + mmc_hostname(host), err); + return err; + } + + /* Set host controller to HS timing */ + mmc_set_timing(card->host, MMC_TIMING_MMC_HS); + + if (!send_status) { + err = mmc_switch_status(card); + if (err) + goto out_err; + } + + val = EXT_CSD_DDR_BUS_WIDTH_8; + if (card->ext_csd.strobe_support) + val |= EXT_CSD_BUS_WIDTH_STROBE; + + /* Switch card to DDR */ + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BUS_WIDTH, + val, + card->ext_csd.generic_cmd6_time); + if (err) { + pr_err("%s: switch to bus width for hs400 failed, err:%d\n", + mmc_hostname(host), err); + return err; + } + + if (card->ext_csd.strobe_support) + mmc_set_bus_width(host, MMC_BUS_WIDTH_8); + + /* Switch card to HS400 */ + val = EXT_CSD_TIMING_HS400 | + card->drive_strength << EXT_CSD_DRV_STR_SHIFT; + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_HS_TIMING, val, + card->ext_csd.generic_cmd6_time, + true, send_status, true); + if (err) { + pr_err("%s: switch to hs400 failed, err:%d\n", + mmc_hostname(host), err); + return err; + } + + /* Set host controller to HS400 timing and frequency */ + mmc_set_timing(host, MMC_TIMING_MMC_HS400); + mmc_set_bus_speed(card); + + if (card->ext_csd.strobe_support && host->ops->enhanced_strobe) { + err = host->ops->enhanced_strobe(host); + } else if ((host->caps2 & MMC_CAP2_HS400_POST_TUNING) && + host->ops->execute_tuning) { + err = host->ops->execute_tuning(host, + MMC_SEND_TUNING_BLOCK_HS200); + if (err) + pr_warn("%s: post tuning execution failed\n", + mmc_hostname(host)); + } + + if (!send_status) { + err = mmc_switch_status(card); + if (err) + goto out_err; + } + + return 0; + +out_err: + pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), + __func__, err); + return err; +} + +int mmc_hs200_to_hs400(struct mmc_card *card) +{ + return mmc_select_hs400(card); +} + +int mmc_hs400_to_hs200(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + bool send_status = true; + unsigned int max_dtr; + int err; + u8 val; + + if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) + send_status = false; + + /* Reduce frequency to HS */ + max_dtr = card->ext_csd.hs_max_dtr; + mmc_set_clock(host, max_dtr); + + /* Switch HS400 to HS DDR */ + val = EXT_CSD_TIMING_HS; + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, + val, card->ext_csd.generic_cmd6_time, + true, send_status, true); + if (err) + goto out_err; + + mmc_set_timing(host, MMC_TIMING_MMC_DDR52); + + if (!send_status) { + err = mmc_switch_status(card); + if (err) + goto out_err; + } + + /* Switch HS DDR to HS */ + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, + EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time, + true, send_status, true); + if (err) + goto out_err; + + mmc_set_timing(host, MMC_TIMING_MMC_HS); + + if (!send_status) { + err = mmc_switch_status(card); + if (err) + goto out_err; + } + + /* Switch HS to HS200 */ + val = EXT_CSD_TIMING_HS200 | + card->drive_strength << EXT_CSD_DRV_STR_SHIFT; + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, + val, card->ext_csd.generic_cmd6_time, true, + send_status, true); + if (err) + goto out_err; + + mmc_set_timing(host, MMC_TIMING_MMC_HS200); + + if (!send_status) { + err = mmc_switch_status(card); + if (err) + goto out_err; + } + + mmc_set_bus_speed(card); + + return 0; + +out_err: + pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), + __func__, err); + return err; +} + +static void mmc_select_driver_type(struct mmc_card *card) +{ + int card_drv_type, drive_strength, drv_type; + + card_drv_type = card->ext_csd.raw_driver_strength | + mmc_driver_type_mask(0); + + drive_strength = mmc_select_drive_strength(card, + card->ext_csd.hs200_max_dtr, + card_drv_type, &drv_type); + + card->drive_strength = drive_strength; + + if (drv_type) + mmc_set_driver_type(card->host, drv_type); +} + +/* + * For device supporting HS200 mode, the following sequence + * should be done before executing the tuning process. + * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported) + * 2. switch to HS200 mode + * 3. set the clock to > 52Mhz and <=200MHz + */ +static int mmc_select_hs200(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + bool send_status = true; + unsigned int old_timing; + int err = -EINVAL; + u8 val; + + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V) + err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); + + if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V) + err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); + + /* If fails try again during next card power cycle */ + if (err) + goto err; + + mmc_select_driver_type(card); + + if (host->caps & MMC_CAP_WAIT_WHILE_BUSY) + send_status = false; + + /* + * Set the bus width(4 or 8) with host's support and + * switch to HS200 mode if bus width is set successfully. + */ + err = mmc_select_bus_width(card); + if (!IS_ERR_VALUE(err)) { + val = EXT_CSD_TIMING_HS200 | + card->drive_strength << EXT_CSD_DRV_STR_SHIFT; + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_HS_TIMING, val, + card->ext_csd.generic_cmd6_time, + true, send_status, true); + if (err) + goto err; + old_timing = host->ios.timing; + mmc_set_timing(host, MMC_TIMING_MMC_HS200); + if (!send_status) { + err = mmc_switch_status(card); + /* + * mmc_select_timing() assumes timing has not changed if + * it is a switch error. + */ + if (err == -EBADMSG) + mmc_set_timing(host, old_timing); + } + } err: + if (err) + pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), + __func__, err); return err; } /* + * Activate High Speed or HS200 mode if supported. + */ +static int mmc_select_timing(struct mmc_card *card) +{ + int err = 0; + + if (!mmc_can_ext_csd(card)) + goto bus_speed; + + /* For Enhance Strobe HS400 flow */ + if (card->ext_csd.strobe_support && + card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && + card->host->caps & MMC_CAP_8_BIT_DATA) + err = mmc_select_hs400(card); + else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) + err = mmc_select_hs200(card); + else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS) + err = mmc_select_hs(card); + + if (err && err != -EBADMSG) + return err; + + if (err) { + pr_warn("%s: switch to %s failed\n", + mmc_card_hs(card) ? "high-speed" : + (mmc_card_hs200(card) ? "hs200" : ""), + mmc_hostname(card->host)); + err = 0; + } + +bus_speed: + /* + * Set the bus speed to the selected bus timing. + * If timing is not selected, backward compatible is the default. + */ + mmc_set_bus_speed(card); + return err; +} + +/* + * Execute tuning sequence to seek the proper bus operating + * conditions for HS200 and HS400, which sends CMD21 to the device. + */ +static int mmc_hs200_tuning(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + + /* + * Timing should be adjusted to the HS400 target + * operation frequency for tuning process + */ + if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && + host->ios.bus_width == MMC_BUS_WIDTH_8) + if (host->ops->prepare_hs400_tuning) + host->ops->prepare_hs400_tuning(host, &host->ios); + + return mmc_execute_tuning(card); +} + +/* * Handle the detection and initialisation of a card. * * In the case of a resume, "oldcard" will contain the card @@ -846,11 +1418,9 @@ struct mmc_card *oldcard) { struct mmc_card *card; - int err, ddr = 0; + int err; u32 cid[4]; - unsigned int max_dtr; u32 rocr; - u8 *ext_csd = NULL; BUG_ON(!host); WARN_ON(!host->claimed); @@ -909,12 +1479,20 @@ goto err; } + card->ocr = ocr; card->type = MMC_TYPE_MMC; card->rca = 1; memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); + host->card = card; } /* + * Call the optional HC's init_card function to handle quirks. + */ + if (host->ops->init_card) + host->ops->init_card(host, card); + + /* * For native busses: set card RCA and quit open drain mode. */ if (!mmc_host_is_spi(host)) { @@ -942,6 +1520,13 @@ } /* + * handling only for cards supporting DSR and hosts requesting + * DSR configuration + */ + if (card->csd.dsr_imp && host->dsr_req) + mmc_set_dsr(host); + + /* * Select card, as all following commands rely on that. */ if (!mmc_host_is_spi(host)) { @@ -951,14 +1536,8 @@ } if (!oldcard) { - /* - * Fetch and process extended CSD. - */ - - err = mmc_get_ext_csd(card, &ext_csd); - if (err) - goto free_card; - err = mmc_read_ext_csd(card, ext_csd); + /* Read extended CSD. */ + err = mmc_read_ext_csd(card); if (err) goto free_card; @@ -978,7 +1557,7 @@ * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF * bit. This bit will be lost every time after a reset or power off. */ - if (card->ext_csd.enhanced_area_en || + if (card->ext_csd.partition_setting_completed || (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_ERASE_GROUP_DEF, 1, @@ -1020,11 +1599,9 @@ } /* - * If the host supports the power_off_notify capability then - * set the notification byte in the ext_csd register of device + * Enable power_off_notification byte in the ext_csd register */ - if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) && - (card->ext_csd.rev >= 6)) { + if (card->ext_csd.rev >= 6) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_POWER_OFF_NOTIFICATION, EXT_CSD_POWER_ON, @@ -1041,211 +1618,34 @@ } /* - * Activate high speed (if supported) + * Select timing interface */ - if (card->ext_csd.hs_max_dtr != 0) { - err = 0; - if (card->ext_csd.hs_max_dtr > 52000000 && - host->caps2 & MMC_CAP2_HS200) - err = mmc_select_hs200(card); - else if (host->caps & MMC_CAP_MMC_HIGHSPEED) - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_HS_TIMING, 1, - card->ext_csd.generic_cmd6_time); + err = mmc_select_timing(card); + if (err) + goto free_card; - if (err && err != -EBADMSG) + if (mmc_card_hs200(card)) { + err = mmc_hs200_tuning(card); + if (err) goto free_card; - if (err) { - pr_warning("%s: switch to highspeed failed\n", - mmc_hostname(card->host)); - err = 0; - } else { - if (card->ext_csd.hs_max_dtr > 52000000 && - host->caps2 & MMC_CAP2_HS200) { - mmc_card_set_hs200(card); - mmc_set_timing(card->host, - MMC_TIMING_MMC_HS200); - } else { - mmc_card_set_highspeed(card); - mmc_set_timing(card->host, MMC_TIMING_MMC_HS); - } + err = mmc_select_hs400(card); + if (err) + goto free_card; + } else if (!mmc_card_hs400(card)) { + /* Select the desired bus width optionally */ + err = mmc_select_bus_width(card); + if (!IS_ERR_VALUE(err) && mmc_card_hs(card)) { + err = mmc_select_hs_ddr(card); + if (err) + goto free_card; } } /* - * Compute bus speed. - */ - max_dtr = (unsigned int)-1; - - if (mmc_card_highspeed(card) || mmc_card_hs200(card)) { - if (max_dtr > card->ext_csd.hs_max_dtr) - max_dtr = card->ext_csd.hs_max_dtr; - if (mmc_card_highspeed(card) && (max_dtr > 52000000)) - max_dtr = 52000000; - } else if (max_dtr > card->csd.max_dtr) { - max_dtr = card->csd.max_dtr; - } - - mmc_set_clock(host, max_dtr); - - /* - * Indicate DDR mode (if supported). + * Choose the power class with selected bus interface */ - if (mmc_card_highspeed(card)) { - if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) - && ((host->caps & (MMC_CAP_1_8V_DDR | - MMC_CAP_UHS_DDR50)) - == (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50))) - ddr = MMC_1_8V_DDR_MODE; - else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) - && ((host->caps & (MMC_CAP_1_2V_DDR | - MMC_CAP_UHS_DDR50)) - == (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50))) - ddr = MMC_1_2V_DDR_MODE; - } - - /* - * Indicate HS200 SDR mode (if supported). - */ - if (mmc_card_hs200(card)) { - u32 ext_csd_bits; - u32 bus_width = card->host->ios.bus_width; - - /* - * For devices supporting HS200 mode, the bus width has - * to be set before executing the tuning function. If - * set before tuning, then device will respond with CRC - * errors for responses on CMD line. So for HS200 the - * sequence will be - * 1. set bus width 4bit / 8 bit (1 bit not supported) - * 2. switch to HS200 mode - * 3. set the clock to > 52Mhz <=200MHz and - * 4. execute tuning for HS200 - */ - if ((host->caps2 & MMC_CAP2_HS200) && - card->host->ops->execute_tuning) { - mmc_host_clk_hold(card->host); - err = card->host->ops->execute_tuning(card->host, - MMC_SEND_TUNING_BLOCK_HS200); - mmc_host_clk_release(card->host); - } - if (err) { - pr_warning("%s: tuning execution failed\n", - mmc_hostname(card->host)); - goto err; - } - - ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ? - EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4; - err = mmc_select_powerclass(card, ext_csd_bits, ext_csd); - if (err) - pr_warning("%s: power class selection to bus width %d" - " failed\n", mmc_hostname(card->host), - 1 << bus_width); - } - - /* - * Activate wide bus and DDR (if supported). - */ - if (!mmc_card_hs200(card) && - (card->csd.mmca_vsn >= CSD_SPEC_VER_4) && - (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { - static unsigned ext_csd_bits[][2] = { - { EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 }, - { EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 }, - { EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 }, - }; - static unsigned bus_widths[] = { - MMC_BUS_WIDTH_8, - MMC_BUS_WIDTH_4, - MMC_BUS_WIDTH_1 - }; - unsigned idx, bus_width = 0; - - if (host->caps & MMC_CAP_8_BIT_DATA) - idx = 0; - else - idx = 1; - for (; idx < ARRAY_SIZE(bus_widths); idx++) { - bus_width = bus_widths[idx]; - if (bus_width == MMC_BUS_WIDTH_1) - ddr = 0; /* no DDR for 1-bit width */ - err = mmc_select_powerclass(card, ext_csd_bits[idx][0], - ext_csd); - if (err) - pr_warning("%s: power class selection to " - "bus width %d failed\n", - mmc_hostname(card->host), - 1 << bus_width); - - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BUS_WIDTH, - ext_csd_bits[idx][0], - card->ext_csd.generic_cmd6_time); - if (!err) { - mmc_set_bus_width(card->host, bus_width); - - /* - * If controller can't handle bus width test, - * compare ext_csd previously read in 1 bit mode - * against ext_csd at new bus width - */ - if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) - err = mmc_compare_ext_csds(card, - bus_width); - else - err = mmc_bus_test(card, bus_width); - if (!err) - break; - } - } - - if (!err && ddr) { - err = mmc_select_powerclass(card, ext_csd_bits[idx][1], - ext_csd); - if (err) - pr_warning("%s: power class selection to " - "bus width %d ddr %d failed\n", - mmc_hostname(card->host), - 1 << bus_width, ddr); - - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BUS_WIDTH, - ext_csd_bits[idx][1], - card->ext_csd.generic_cmd6_time); - } - if (err) { - pr_warning("%s: switch to bus width %d ddr %d " - "failed\n", mmc_hostname(card->host), - 1 << bus_width, ddr); - goto free_card; - } else if (ddr) { - /* - * eMMC cards can support 3.3V to 1.2V i/o (vccq) - * signaling. - * - * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq. - * - * 1.8V vccq at 3.3V core voltage (vcc) is not required - * in the JEDEC spec for DDR. - * - * Do not force change in vccq since we are obviously - * working and no change to vccq is needed. - * - * WARNING: eMMC rules are NOT the same as SD DDR - */ - if (ddr == MMC_1_2V_DDR_MODE) { - err = __mmc_set_signal_voltage(host, - MMC_SIGNAL_VOLTAGE_120); - if (err) - goto err; - } - mmc_card_set_ddr_mode(card); - mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50); - mmc_set_bus_width(card->host, bus_width); - } - } + mmc_select_powerclass(card); /* * Enable HPI feature (if supported) @@ -1257,8 +1657,8 @@ if (err && err != -EBADMSG) goto free_card; if (err) { - pr_warning("%s: Enabling HPI failed\n", - mmc_hostname(card->host)); + pr_warn("%s: Enabling HPI failed\n", + mmc_hostname(card->host)); err = 0; } else card->ext_csd.hpi_en = 1; @@ -1268,8 +1668,7 @@ * If cache size is higher than 0, this indicates * the existence of cache and it can be turned on. */ - if ((host->caps2 & MMC_CAP2_CACHE_CTRL) && - card->ext_csd.cache_size > 0) { + if (card->ext_csd.cache_size > 0) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CACHE_CTRL, 1, card->ext_csd.generic_cmd6_time); @@ -1280,9 +1679,8 @@ * Only if no error, cache is turned on successfully. */ if (err) { - pr_warning("%s: Cache is supported, " - "but failed to turn on (%d)\n", - mmc_hostname(card->host), err); + pr_warn("%s: Cache is supported, but failed to turn on (%d)\n", + mmc_hostname(card->host), err); card->ext_csd.cache_ctrl = 0; err = 0; } else { @@ -1316,15 +1714,68 @@ if (!oldcard) host->card = card; - mmc_free_ext_csd(ext_csd); return 0; free_card: - if (!oldcard) + if (!oldcard) { + host->card = NULL; mmc_remove_card(card); + } err: - mmc_free_ext_csd(ext_csd); + return err; +} +static int mmc_can_sleep(struct mmc_card *card) +{ + return (card && card->ext_csd.rev >= 3); +} + +static int mmc_sleep(struct mmc_host *host) +{ + struct mmc_command cmd = {0}; + struct mmc_card *card = host->card; + unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000); + int err; + + /* Re-tuning can't be done once the card is deselected */ + mmc_retune_hold(host); + + err = mmc_deselect_cards(host); + if (err) + goto out_release; + + cmd.opcode = MMC_SLEEP_AWAKE; + cmd.arg = card->rca << 16; + cmd.arg |= 1 << 15; + + /* + * If the max_busy_timeout of the host is specified, validate it against + * the sleep cmd timeout. A failure means we need to prevent the host + * from doing hw busy detection, which is done by converting to a R1 + * response instead of a R1B. + */ + if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) { + cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; + } else { + cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; + cmd.busy_timeout = timeout_ms; + } + + err = mmc_wait_for_cmd(host, &cmd, 0); + if (err) + goto out_release; + + /* + * If the host does not wait while the card signals busy, then we will + * will have to wait the sleep/awake timeout. Note, we cannot use the + * SEND_STATUS command to poll the status because that command (and most + * others) is invalid while the card sleeps. + */ + if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY)) + mmc_delay(timeout_ms); + +out_release: + mmc_retune_release(host); return err; } @@ -1344,9 +1795,9 @@ if (notify_type == EXT_CSD_POWER_OFF_LONG) timeout = card->ext_csd.power_off_longtime; - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_POWER_OFF_NOTIFICATION, - notify_type, timeout); + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_POWER_OFF_NOTIFICATION, + notify_type, timeout, true, false, false); if (err) pr_err("%s: Power Off Notification timed out, %u\n", mmc_hostname(card->host), timeout); @@ -1387,14 +1838,14 @@ BUG_ON(!host); BUG_ON(!host->card); - mmc_claim_host(host); + mmc_get_card(host->card); /* * Just check if our card has been removed. */ err = _mmc_detect_card_removed(host); - mmc_release_host(host); + mmc_put_card(host->card); if (err) { mmc_remove(host); @@ -1406,137 +1857,212 @@ } } -/* - * Suspend callback from host. - */ -static int mmc_suspend(struct mmc_host *host) +static int _mmc_suspend(struct mmc_host *host, bool is_suspend) { int err = 0; + unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT : + EXT_CSD_POWER_OFF_LONG; BUG_ON(!host); BUG_ON(!host->card); mmc_claim_host(host); - err = mmc_cache_ctrl(host, 0); + if (mmc_card_suspended(host->card)) + goto out; + + if (mmc_card_doing_bkops(host->card)) { + err = mmc_stop_bkops(host->card); + if (err) + goto out; + } + + err = mmc_flush_cache(host->card); if (err) goto out; - if (mmc_can_poweroff_notify(host->card)) - err = mmc_poweroff_notify(host->card, EXT_CSD_POWER_OFF_SHORT); - else if (mmc_card_can_sleep(host)) - err = mmc_card_sleep(host); + if (mmc_can_poweroff_notify(host->card) && + ((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend)) + err = mmc_poweroff_notify(host->card, notify_type); + else if (mmc_can_sleep(host->card)) + err = mmc_sleep(host); else if (!mmc_host_is_spi(host)) err = mmc_deselect_cards(host); - host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200); + if (!err) { + mmc_power_off(host); + mmc_card_set_suspended(host->card); + } out: mmc_release_host(host); return err; } /* - * Resume callback from host. - * + * Suspend callback + */ +static int mmc_suspend(struct mmc_host *host) +{ + int err; + + err = _mmc_suspend(host, true); + if (!err) { + pm_runtime_disable(&host->card->dev); + pm_runtime_set_suspended(&host->card->dev); + } + + return err; +} + +/* * This function tries to determine if the same card is still present * and, if so, restore all state to it. */ -static int mmc_resume(struct mmc_host *host) +static int _mmc_resume(struct mmc_host *host) { - int err; + int err = 0; BUG_ON(!host); BUG_ON(!host->card); mmc_claim_host(host); - err = mmc_init_card(host, host->ocr, host->card); - mmc_release_host(host); + if (!mmc_card_suspended(host->card)) + goto out; + + mmc_power_up(host, host->card->ocr); + err = mmc_init_card(host, host->card->ocr, host->card); + mmc_card_clr_suspended(host->card); + +out: + mmc_release_host(host); return err; } -static int mmc_power_restore(struct mmc_host *host) +/* + * Shutdown callback + */ +static int mmc_shutdown(struct mmc_host *host) { - int ret; + int err = 0; - host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200); - mmc_claim_host(host); - ret = mmc_init_card(host, host->ocr, host->card); - mmc_release_host(host); + /* + * In a specific case for poweroff notify, we need to resume the card + * before we can shutdown it properly. + */ + if (mmc_can_poweroff_notify(host->card) && + !(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE)) + err = _mmc_resume(host); - return ret; + if (!err) + err = _mmc_suspend(host, false); + + return err; } -static int mmc_sleep(struct mmc_host *host) +/* + * Callback for resume. + */ +static int mmc_resume(struct mmc_host *host) { - struct mmc_card *card = host->card; - int err = -ENOSYS; + int err = 0; - if (card && card->ext_csd.rev >= 3) { - err = mmc_card_sleepawake(host, 1); - if (err < 0) - pr_debug("%s: Error %d while putting card into sleep", - mmc_hostname(host), err); + if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) { + err = _mmc_resume(host); + pm_runtime_set_active(&host->card->dev); + pm_runtime_mark_last_busy(&host->card->dev); } + pm_runtime_enable(&host->card->dev); return err; } -static int mmc_awake(struct mmc_host *host) +/* + * Callback for runtime_suspend. + */ +static int mmc_runtime_suspend(struct mmc_host *host) { - struct mmc_card *card = host->card; - int err = -ENOSYS; + int err; - if (card && card->ext_csd.rev >= 3) { - err = mmc_card_sleepawake(host, 0); - if (err < 0) - pr_debug("%s: Error %d while awaking sleeping card", - mmc_hostname(host), err); - } + if (!(host->caps & MMC_CAP_AGGRESSIVE_PM)) + return 0; + + err = _mmc_suspend(host, true); + if (err) + pr_err("%s: error %d doing aggressive suspend\n", + mmc_hostname(host), err); return err; } -static const struct mmc_bus_ops mmc_ops = { - .awake = mmc_awake, - .sleep = mmc_sleep, - .remove = mmc_remove, - .detect = mmc_detect, - .suspend = NULL, - .resume = NULL, - .power_restore = mmc_power_restore, - .alive = mmc_alive, -}; +/* + * Callback for runtime_resume. + */ +static int mmc_runtime_resume(struct mmc_host *host) +{ + int err; + + if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME))) + return 0; + + err = _mmc_resume(host); + if (err) + pr_err("%s: error %d doing aggressive resume\n", + mmc_hostname(host), err); + + return 0; +} + +int mmc_can_reset(struct mmc_card *card) +{ + u8 rst_n_function; + + rst_n_function = card->ext_csd.rst_n_function; + if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) + return 0; + return 1; +} +EXPORT_SYMBOL(mmc_can_reset); + +static int mmc_reset(struct mmc_host *host) +{ + struct mmc_card *card = host->card; -static const struct mmc_bus_ops mmc_ops_unsafe = { - .awake = mmc_awake, - .sleep = mmc_sleep, + if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) + return -EOPNOTSUPP; + + if (!mmc_can_reset(card)) + return -EOPNOTSUPP; + + mmc_set_clock(host, host->f_init); + + host->ops->hw_reset(host); + + /* Set initial state and call mmc_set_ios */ + mmc_set_initial_state(host); + + return mmc_init_card(host, card->ocr, card); +} + +static const struct mmc_bus_ops mmc_ops = { .remove = mmc_remove, .detect = mmc_detect, .suspend = mmc_suspend, .resume = mmc_resume, - .power_restore = mmc_power_restore, + .runtime_suspend = mmc_runtime_suspend, + .runtime_resume = mmc_runtime_resume, .alive = mmc_alive, + .shutdown = mmc_shutdown, + .reset = mmc_reset, }; -static void mmc_attach_bus_ops(struct mmc_host *host) -{ - const struct mmc_bus_ops *bus_ops; - - if (!mmc_card_is_removable(host)) - bus_ops = &mmc_ops_unsafe; - else - bus_ops = &mmc_ops; - mmc_attach_bus(host, bus_ops); -} - /* * Starting point for MMC card init. */ int mmc_attach_mmc(struct mmc_host *host) { int err; - u32 ocr; + u32 ocr, rocr; BUG_ON(!host); WARN_ON(!host->claimed); @@ -1549,7 +2075,7 @@ if (err) return err; - mmc_attach_bus_ops(host); + mmc_attach_bus(host, &mmc_ops); if (host->ocr_avail_mmc) host->ocr_avail = host->ocr_avail_mmc; @@ -1562,23 +2088,12 @@ goto err; } - /* - * Sanity check the voltages that the card claims to - * support. - */ - if (ocr & 0x7F) { - pr_warning("%s: card claims to support voltages " - "below the defined range. These will be ignored.\n", - mmc_hostname(host)); - ocr &= ~0x7F; - } - - host->ocr = mmc_select_voltage(host, ocr); + rocr = mmc_select_voltage(host, ocr); /* * Can we support the voltage of the card? */ - if (!host->ocr) { + if (!rocr) { err = -EINVAL; goto err; } @@ -1586,20 +2101,19 @@ /* * Detect and init the card. */ - err = mmc_init_card(host, host->ocr, NULL); + err = mmc_init_card(host, rocr, NULL); if (err) goto err; mmc_release_host(host); err = mmc_add_card(host->card); - mmc_claim_host(host); if (err) goto remove_card; + mmc_claim_host(host); return 0; remove_card: - mmc_release_host(host); mmc_remove_card(host->card); mmc_claim_host(host); host->card = NULL;