| /* |
| * linux/drivers/mmc/core/mmc.c |
| * |
| * Copyright (C) 2003-2004 Russell King, All Rights Reserved. |
| * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved. |
| * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/of.h> |
| #include <linux/slab.h> |
| #include <linux/stat.h> |
| #include <linux/pm_runtime.h> |
| |
| #include <linux/mmc/host.h> |
| #include <linux/mmc/card.h> |
| #include <linux/mmc/mmc.h> |
| |
| #include "core.h" |
| #include "host.h" |
| #include "bus.h" |
| #include "mmc_ops.h" |
| #include "sd_ops.h" |
| |
| static const unsigned int tran_exp[] = { |
| 10000, 100000, 1000000, 10000000, |
| 0, 0, 0, 0 |
| }; |
| |
| static const unsigned char tran_mant[] = { |
| 0, 10, 12, 13, 15, 20, 25, 30, |
| 35, 40, 45, 50, 55, 60, 70, 80, |
| }; |
| |
| static const unsigned int tacc_exp[] = { |
| 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, |
| }; |
| |
| static const unsigned int tacc_mant[] = { |
| 0, 10, 12, 13, 15, 20, 25, 30, |
| 35, 40, 45, 50, 55, 60, 70, 80, |
| }; |
| |
| static const struct mmc_fixup mmc_ext_csd_fixups[] = { |
| /* |
| * Certain Hynix eMMC 4.41 cards might get broken when HPI feature |
| * is used so disable the HPI feature for such buggy cards. |
| */ |
| MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX, |
| 0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5), |
| |
| END_FIXUP |
| }; |
| |
| #define UNSTUFF_BITS(resp,start,size) \ |
| ({ \ |
| const int __size = size; \ |
| const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \ |
| const int __off = 3 - ((start) / 32); \ |
| const int __shft = (start) & 31; \ |
| u32 __res; \ |
| \ |
| __res = resp[__off] >> __shft; \ |
| if (__size + __shft > 32) \ |
| __res |= resp[__off-1] << ((32 - __shft) % 32); \ |
| __res & __mask; \ |
| }) |
| |
| /* |
| * Given the decoded CSD structure, decode the raw CID to our CID structure. |
| */ |
| static int mmc_decode_cid(struct mmc_card *card) |
| { |
| u32 *resp = card->raw_cid; |
| |
| /* |
| * The selection of the format here is based upon published |
| * specs from sandisk and from what people have reported. |
| */ |
| switch (card->csd.mmca_vsn) { |
| case 0: /* MMC v1.0 - v1.2 */ |
| case 1: /* MMC v1.4 */ |
| card->cid.manfid = UNSTUFF_BITS(resp, 104, 24); |
| card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8); |
| card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); |
| card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); |
| card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); |
| card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); |
| card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); |
| card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8); |
| card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4); |
| card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4); |
| card->cid.serial = UNSTUFF_BITS(resp, 16, 24); |
| card->cid.month = UNSTUFF_BITS(resp, 12, 4); |
| card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; |
| break; |
| |
| 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); |
| card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8); |
| card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8); |
| card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8); |
| card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8); |
| card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8); |
| card->cid.prv = UNSTUFF_BITS(resp, 48, 8); |
| card->cid.serial = UNSTUFF_BITS(resp, 16, 32); |
| card->cid.month = UNSTUFF_BITS(resp, 12, 4); |
| card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997; |
| break; |
| |
| default: |
| pr_err("%s: card has unknown MMCA version %d\n", |
| mmc_hostname(card->host), card->csd.mmca_vsn); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static void mmc_set_erase_size(struct mmc_card *card) |
| { |
| if (card->ext_csd.erase_group_def & 1) |
| card->erase_size = card->ext_csd.hc_erase_size; |
| else |
| card->erase_size = card->csd.erase_size; |
| |
| mmc_init_erase(card); |
| } |
| |
| /* |
| * Given a 128-bit response, decode to our card CSD structure. |
| */ |
| static int mmc_decode_csd(struct mmc_card *card) |
| { |
| struct mmc_csd *csd = &card->csd; |
| unsigned int e, m, a, b; |
| u32 *resp = card->raw_csd; |
| |
| /* |
| * We only understand CSD structure v1.1 and v1.2. |
| * v1.2 has extra information in bits 15, 11 and 10. |
| * We also support eMMC v4.4 & v4.41. |
| */ |
| csd->structure = UNSTUFF_BITS(resp, 126, 2); |
| if (csd->structure == 0) { |
| pr_err("%s: unrecognised CSD structure version %d\n", |
| mmc_hostname(card->host), csd->structure); |
| return -EINVAL; |
| } |
| |
| csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4); |
| m = UNSTUFF_BITS(resp, 115, 4); |
| e = UNSTUFF_BITS(resp, 112, 3); |
| csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10; |
| csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100; |
| |
| m = UNSTUFF_BITS(resp, 99, 4); |
| e = UNSTUFF_BITS(resp, 96, 3); |
| csd->max_dtr = tran_exp[e] * tran_mant[m]; |
| csd->cmdclass = UNSTUFF_BITS(resp, 84, 12); |
| |
| e = UNSTUFF_BITS(resp, 47, 3); |
| m = UNSTUFF_BITS(resp, 62, 12); |
| 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->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); |
| |
| if (csd->write_blkbits >= 9) { |
| a = UNSTUFF_BITS(resp, 42, 5); |
| b = UNSTUFF_BITS(resp, 37, 5); |
| csd->erase_size = (a + 1) * (b + 1); |
| csd->erase_size <<= csd->write_blkbits - 9; |
| } |
| |
| return 0; |
| } |
| |
| static void mmc_select_card_type(struct mmc_card *card) |
| { |
| 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; |
| |
| 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; |
| } |
| |
| 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 (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; |
| } |
| |
| 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; |
| } |
| |
| 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 (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; |
| } |
| |
| 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; |
| } |
| |
| 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; |
| } |
| |
| if ((caps2 & MMC_CAP2_HS400_ES) && |
| card->ext_csd.strobe_support && |
| (avail_type & EXT_CSD_CARD_TYPE_HS400)) |
| avail_type |= EXT_CSD_CARD_TYPE_HS400ES; |
| |
| 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_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) |
| { |
| u8 hc_erase_grp_sz, hc_wp_grp_sz; |
| |
| /* |
| * Disable these attributes by default |
| */ |
| card->ext_csd.enhanced_area_offset = -EINVAL; |
| card->ext_csd.enhanced_area_size = -EINVAL; |
| |
| /* |
| * 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]; |
| |
| /* |
| * 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)); |
| } |
| } |
| } |
| |
| 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; |
| |
| /* |
| * 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 */ |
| #define MMC_MIN_PART_SWITCH_TIME 300 |
| |
| /* |
| * Decode extended CSD. |
| */ |
| static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) |
| { |
| int err = 0, idx; |
| unsigned int part_size; |
| 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]; |
| if (card->csd.structure == 3) { |
| if (card->ext_csd.raw_ext_csd_structure > 2) { |
| pr_err("%s: unrecognised EXT_CSD structure " |
| "version %d\n", mmc_hostname(card->host), |
| card->ext_csd.raw_ext_csd_structure); |
| err = -EINVAL; |
| goto out; |
| } |
| } |
| |
| 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]; |
| |
| /* fixup device after ext_csd revision field is updated */ |
| mmc_fixup_device(card, mmc_ext_csd_fixups); |
| |
| 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]; |
| card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2]; |
| card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3]; |
| if (card->ext_csd.rev >= 2) { |
| card->ext_csd.sectors = |
| ext_csd[EXT_CSD_SEC_CNT + 0] << 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; |
| |
| /* Cards with density > 2GiB are sector addressed */ |
| if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512) |
| mmc_card_set_blockaddr(card); |
| } |
| |
| card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT]; |
| card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; |
| mmc_select_card_type(card); |
| |
| card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT]; |
| card->ext_csd.raw_erase_timeout_mult = |
| ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; |
| card->ext_csd.raw_hc_erase_grp_size = |
| ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; |
| if (card->ext_csd.rev >= 3) { |
| u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT]; |
| card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG]; |
| |
| /* EXT_CSD value is in units of 10ms, but we store in ms */ |
| card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME]; |
| /* Some eMMC set the value too low so set a minimum */ |
| if (card->ext_csd.part_time && |
| card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) |
| card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; |
| |
| /* Sleep / awake timeout in 100ns units */ |
| if (sa_shift > 0 && sa_shift <= 0x17) |
| card->ext_csd.sa_timeout = |
| 1 << ext_csd[EXT_CSD_S_A_TIMEOUT]; |
| card->ext_csd.erase_group_def = |
| ext_csd[EXT_CSD_ERASE_GROUP_DEF]; |
| card->ext_csd.hc_erase_timeout = 300 * |
| ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]; |
| card->ext_csd.hc_erase_size = |
| ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10; |
| |
| card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C]; |
| |
| /* |
| * There are two boot regions of equal size, defined in |
| * multiples of 128K. |
| */ |
| if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { |
| for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { |
| part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; |
| mmc_part_add(card, part_size, |
| EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, |
| "boot%d", idx, true, |
| MMC_BLK_DATA_AREA_BOOT); |
| } |
| } |
| } |
| |
| card->ext_csd.raw_hc_erase_gap_size = |
| ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; |
| card->ext_csd.raw_sec_trim_mult = |
| ext_csd[EXT_CSD_SEC_TRIM_MULT]; |
| card->ext_csd.raw_sec_erase_mult = |
| ext_csd[EXT_CSD_SEC_ERASE_MULT]; |
| card->ext_csd.raw_sec_feature_support = |
| ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; |
| 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) { |
| 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; |
| |
| mmc_manage_enhanced_area(card, ext_csd); |
| |
| mmc_manage_gp_partitions(card, ext_csd); |
| |
| card->ext_csd.sec_trim_mult = |
| ext_csd[EXT_CSD_SEC_TRIM_MULT]; |
| card->ext_csd.sec_erase_mult = |
| ext_csd[EXT_CSD_SEC_ERASE_MULT]; |
| card->ext_csd.sec_feature_support = |
| ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]; |
| card->ext_csd.trim_timeout = 300 * |
| ext_csd[EXT_CSD_TRIM_MULT]; |
| |
| /* |
| * Note that the call to mmc_part_add above defaults to read |
| * only. If this default assumption is changed, the call must |
| * take into account the value of boot_locked below. |
| */ |
| 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 (!mmc_card_broken_hpi(card) && |
| ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) { |
| card->ext_csd.bkops = 1; |
| 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.man_bkops_en) |
| pr_debug("%s: MAN_BKOPS_EN bit is not set\n", |
| mmc_hostname(card->host)); |
| } |
| |
| /* check whether the eMMC card supports HPI */ |
| if (!mmc_card_broken_hpi(card) && |
| !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; |
| else |
| card->ext_csd.hpi_cmd = MMC_SEND_STATUS; |
| /* |
| * Indicate the maximum timeout to close |
| * a command interrupted by HPI |
| */ |
| card->ext_csd.out_of_int_time = |
| ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10; |
| } |
| |
| card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; |
| card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; |
| |
| /* |
| * RPMB regions are defined in multiples of 128K. |
| */ |
| card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; |
| if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) { |
| mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, |
| EXT_CSD_PART_CONFIG_ACC_RPMB, |
| "rpmb", 0, false, |
| MMC_BLK_DATA_AREA_RPMB); |
| } |
| } |
| |
| card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; |
| if (ext_csd[EXT_CSD_ERASED_MEM_CONT]) |
| card->erased_byte = 0xFF; |
| else |
| card->erased_byte = 0x0; |
| |
| /* eMMC v4.5 or later */ |
| if (card->ext_csd.rev >= 6) { |
| card->ext_csd.feature_support |= MMC_DISCARD_FEATURE; |
| |
| card->ext_csd.generic_cmd6_time = 10 * |
| ext_csd[EXT_CSD_GENERIC_CMD6_TIME]; |
| card->ext_csd.power_off_longtime = 10 * |
| ext_csd[EXT_CSD_POWER_OFF_LONG_TIME]; |
| |
| card->ext_csd.cache_size = |
| ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 | |
| ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 | |
| ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 | |
| ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24; |
| |
| if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1) |
| card->ext_csd.data_sector_size = 4096; |
| else |
| card->ext_csd.data_sector_size = 512; |
| |
| if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) && |
| (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) { |
| card->ext_csd.data_tag_unit_size = |
| ((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) * |
| (card->ext_csd.data_sector_size); |
| } else { |
| card->ext_csd.data_tag_unit_size = 0; |
| } |
| |
| card->ext_csd.max_packed_writes = |
| ext_csd[EXT_CSD_MAX_PACKED_WRITES]; |
| card->ext_csd.max_packed_reads = |
| ext_csd[EXT_CSD_MAX_PACKED_READS]; |
| } else { |
| card->ext_csd.data_sector_size = 512; |
| } |
| |
| /* 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 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; |
| int err; |
| |
| if (bus_width == MMC_BUS_WIDTH_1) |
| return 0; |
| |
| err = mmc_get_ext_csd(card, &bw_ext_csd); |
| if (err) |
| return err; |
| |
| /* only compare read only fields */ |
| err = !((card->ext_csd.raw_partition_support == |
| bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) && |
| (card->ext_csd.raw_erased_mem_count == |
| bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) && |
| (card->ext_csd.rev == |
| bw_ext_csd[EXT_CSD_REV]) && |
| (card->ext_csd.raw_ext_csd_structure == |
| bw_ext_csd[EXT_CSD_STRUCTURE]) && |
| (card->ext_csd.raw_card_type == |
| bw_ext_csd[EXT_CSD_CARD_TYPE]) && |
| (card->ext_csd.raw_s_a_timeout == |
| bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) && |
| (card->ext_csd.raw_hc_erase_gap_size == |
| bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) && |
| (card->ext_csd.raw_erase_timeout_mult == |
| bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) && |
| (card->ext_csd.raw_hc_erase_grp_size == |
| bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) && |
| (card->ext_csd.raw_sec_trim_mult == |
| bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) && |
| (card->ext_csd.raw_sec_erase_mult == |
| bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) && |
| (card->ext_csd.raw_sec_feature_support == |
| bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) && |
| (card->ext_csd.raw_trim_mult == |
| bw_ext_csd[EXT_CSD_TRIM_MULT]) && |
| (card->ext_csd.raw_sectors[0] == |
| bw_ext_csd[EXT_CSD_SEC_CNT + 0]) && |
| (card->ext_csd.raw_sectors[1] == |
| bw_ext_csd[EXT_CSD_SEC_CNT + 1]) && |
| (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]) && |
| (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; |
| |
| kfree(bw_ext_csd); |
| return err; |
| } |
| |
| MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], |
| card->raw_cid[2], card->raw_cid[3]); |
| MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], |
| card->raw_csd[2], card->raw_csd[3]); |
| 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(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); |
| MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); |
| MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); |
| MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); |
| MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", |
| card->ext_csd.enhanced_area_offset); |
| MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); |
| 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); |
| MMC_DEV_ATTR(ocr, "%08x\n", card->ocr); |
| |
| 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 ssize_t mmc_dsr_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct mmc_card *card = mmc_dev_to_card(dev); |
| struct mmc_host *host = card->host; |
| |
| if (card->csd.dsr_imp && host->dsr_req) |
| return sprintf(buf, "0x%x\n", host->dsr); |
| else |
| /* return default DSR value */ |
| return sprintf(buf, "0x%x\n", 0x404); |
| } |
| |
| static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL); |
| |
| static struct attribute *mmc_std_attrs[] = { |
| &dev_attr_cid.attr, |
| &dev_attr_csd.attr, |
| &dev_attr_date.attr, |
| &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, |
| &dev_attr_oemid.attr, |
| &dev_attr_prv.attr, |
| &dev_attr_serial.attr, |
| &dev_attr_enhanced_area_offset.attr, |
| &dev_attr_enhanced_area_size.attr, |
| &dev_attr_raw_rpmb_size_mult.attr, |
| &dev_attr_rel_sectors.attr, |
| &dev_attr_ocr.attr, |
| &dev_attr_dsr.attr, |
| NULL, |
| }; |
| ATTRIBUTE_GROUPS(mmc_std); |
| |
| static struct device_type mmc_type = { |
| .groups = mmc_std_groups, |
| }; |
| |
| /* |
| * Select the PowerClass for the current bus width |
| * If power class is defined for 4/8 bit bus in the |
| * extended CSD register, select it by executing the |
| * mmc_switch command. |
| */ |
| 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; |
| |
| switch (1 << host->ios.vdd) { |
| case MMC_VDD_165_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: |
| case MMC_VDD_29_30: |
| case MMC_VDD_30_31: |
| case MMC_VDD_31_32: |
| case MMC_VDD_32_33: |
| case MMC_VDD_33_34: |
| case MMC_VDD_34_35: |
| case MMC_VDD_35_36: |
| 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_warn("%s: Voltage range not supported for power class\n", |
| mmc_hostname(host)); |
| return -EINVAL; |
| } |
| |
| 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; |
| else |
| pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >> |
| EXT_CSD_PWR_CL_4BIT_SHIFT; |
| |
| /* If the power class is different from the default value */ |
| if (pwrclass_val > 0) { |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_POWER_CLASS, |
| pwrclass_val, |
| card->ext_csd.generic_cmd6_time); |
| } |
| |
| 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; |
| } |
| |
| /* |
| * Set the bus speed for the selected speed mode. |
| */ |
| 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) |
| { |
| static unsigned ext_csd_bits[] = { |
| EXT_CSD_BUS_WIDTH_8, |
| EXT_CSD_BUS_WIDTH_4, |
| }; |
| static unsigned bus_widths[] = { |
| MMC_BUS_WIDTH_8, |
| MMC_BUS_WIDTH_4, |
| }; |
| struct mmc_host *host = card->host; |
| unsigned idx, bus_width = 0; |
| int err = 0; |
| |
| 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) ? 0 : 1; |
| |
| /* |
| * Unlike SD, MMC cards dont have a configuration register to notify |
| * supported bus width. So bus test command should be run to identify |
| * 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 < ARRAY_SIZE(bus_widths); idx++) { |
| /* |
| * Host is capable of 8bit transfer, then switch |
| * the device to work in 8bit transfer mode. If the |
| * mmc switch command returns error then switch to |
| * 4bit transfer mode. On success set the corresponding |
| * bus width on the host. |
| */ |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_BUS_WIDTH, |
| ext_csd_bits[idx], |
| card->ext_csd.generic_cmd6_time); |
| if (err) |
| continue; |
| |
| 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_width); |
| else |
| 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), 1 << bus_width); |
| } |
| } |
| |
| 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); |
| } |
| |
| /* |
| * 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, false, true); |
| if (!err) { |
| mmc_set_timing(card->host, MMC_TIMING_MMC_HS); |
| err = mmc_switch_status(card); |
| } |
| |
| if (err) |
| pr_warn("%s: switch to high-speed failed, err:%d\n", |
| mmc_hostname(card->host), err); |
| |
| 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; |
| } |
| |
| static int mmc_select_hs400(struct mmc_card *card) |
| { |
| struct mmc_host *host = card->host; |
| unsigned int max_dtr; |
| int err = 0; |
| u8 val; |
| |
| /* |
| * HS400 mode requires 8-bit bus width |
| */ |
| if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 && |
| host->ios.bus_width == MMC_BUS_WIDTH_8)) |
| return 0; |
| |
| /* 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, false, 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); |
| |
| /* Reduce frequency to HS frequency */ |
| max_dtr = card->ext_csd.hs_max_dtr; |
| mmc_set_clock(host, max_dtr); |
| |
| err = mmc_switch_status(card); |
| if (err) |
| goto out_err; |
| |
| /* Switch card to DDR */ |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_BUS_WIDTH, |
| EXT_CSD_DDR_BUS_WIDTH_8, |
| 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; |
| } |
| |
| /* 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, false, 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); |
| |
| 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; |
| unsigned int max_dtr; |
| int err; |
| u8 val; |
| |
| /* 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, false, true); |
| if (err) |
| goto out_err; |
| |
| mmc_set_timing(host, MMC_TIMING_MMC_DDR52); |
| |
| 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, false, true); |
| if (err) |
| goto out_err; |
| |
| mmc_set_timing(host, MMC_TIMING_MMC_HS); |
| |
| 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, false, true); |
| if (err) |
| goto out_err; |
| |
| mmc_set_timing(host, MMC_TIMING_MMC_HS200); |
| |
| 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 int mmc_select_hs400es(struct mmc_card *card) |
| { |
| struct mmc_host *host = card->host; |
| int err = 0; |
| u8 val; |
| |
| if (!(host->caps & MMC_CAP_8_BIT_DATA)) { |
| err = -ENOTSUPP; |
| goto out_err; |
| } |
| |
| err = mmc_select_bus_width(card); |
| if (err < 0) |
| goto out_err; |
| |
| /* Switch card to HS mode */ |
| err = mmc_select_hs(card); |
| if (err) |
| goto out_err; |
| |
| err = mmc_switch_status(card); |
| if (err) |
| goto out_err; |
| |
| /* Switch card to DDR with strobe bit */ |
| val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE; |
| 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 hs400es failed, err:%d\n", |
| mmc_hostname(host), err); |
| goto out_err; |
| } |
| |
| /* 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, false, true); |
| if (err) { |
| pr_err("%s: switch to hs400es failed, err:%d\n", |
| mmc_hostname(host), err); |
| goto out_err; |
| } |
| |
| /* Set host controller to HS400 timing and frequency */ |
| mmc_set_timing(host, MMC_TIMING_MMC_HS400); |
| |
| /* Controller enable enhanced strobe function */ |
| host->ios.enhanced_strobe = true; |
| if (host->ops->hs400_enhanced_strobe) |
| host->ops->hs400_enhanced_strobe(host, &host->ios); |
| |
| 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; |
| } |
| |
| 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; |
| unsigned int old_timing, old_signal_voltage; |
| int err = -EINVAL; |
| u8 val; |
| |
| old_signal_voltage = host->ios.signal_voltage; |
| 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) |
| return err; |
| |
| mmc_select_driver_type(card); |
| |
| /* |
| * 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 (err > 0) { |
| 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, false, true); |
| if (err) |
| goto err; |
| old_timing = host->ios.timing; |
| mmc_set_timing(host, MMC_TIMING_MMC_HS200); |
| |
| 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) { |
| /* fall back to the old signal voltage, if fails report error */ |
| if (__mmc_set_signal_voltage(host, old_signal_voltage)) |
| err = -EIO; |
| |
| pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host), |
| __func__, err); |
| } |
| return err; |
| } |
| |
| /* |
| * Activate High Speed, HS200 or HS400ES mode if supported. |
| */ |
| static int mmc_select_timing(struct mmc_card *card) |
| { |
| int err = 0; |
| |
| if (!mmc_can_ext_csd(card)) |
| goto bus_speed; |
| |
| if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) |
| err = mmc_select_hs400es(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; |
| |
| 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 0; |
| } |
| |
| /* |
| * 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 |
| * we're trying to reinitialise. |
| */ |
| static int mmc_init_card(struct mmc_host *host, u32 ocr, |
| struct mmc_card *oldcard) |
| { |
| struct mmc_card *card; |
| int err; |
| u32 cid[4]; |
| u32 rocr; |
| |
| BUG_ON(!host); |
| WARN_ON(!host->claimed); |
| |
| /* Set correct bus mode for MMC before attempting init */ |
| if (!mmc_host_is_spi(host)) |
| mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); |
| |
| /* |
| * Since we're changing the OCR value, we seem to |
| * need to tell some cards to go back to the idle |
| * state. We wait 1ms to give cards time to |
| * respond. |
| * mmc_go_idle is needed for eMMC that are asleep |
| */ |
| mmc_go_idle(host); |
| |
| /* The extra bit indicates that we support high capacity */ |
| err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr); |
| if (err) |
| goto err; |
| |
| /* |
| * For SPI, enable CRC as appropriate. |
| */ |
| if (mmc_host_is_spi(host)) { |
| err = mmc_spi_set_crc(host, use_spi_crc); |
| if (err) |
| goto err; |
| } |
| |
| /* |
| * Fetch CID from card. |
| */ |
| if (mmc_host_is_spi(host)) |
| err = mmc_send_cid(host, cid); |
| else |
| err = mmc_all_send_cid(host, cid); |
| if (err) |
| goto err; |
| |
| if (oldcard) { |
| if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { |
| err = -ENOENT; |
| goto err; |
| } |
| |
| card = oldcard; |
| } else { |
| /* |
| * Allocate card structure. |
| */ |
| card = mmc_alloc_card(host, &mmc_type); |
| if (IS_ERR(card)) { |
| err = PTR_ERR(card); |
| goto err; |
| } |
| |
| card->ocr = ocr; |
| card->type = MMC_TYPE_MMC; |
| card->rca = 1; |
| memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); |
| } |
| |
| /* |
| * 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)) { |
| err = mmc_set_relative_addr(card); |
| if (err) |
| goto free_card; |
| |
| mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
| } |
| |
| if (!oldcard) { |
| /* |
| * Fetch CSD from card. |
| */ |
| err = mmc_send_csd(card, card->raw_csd); |
| if (err) |
| goto free_card; |
| |
| err = mmc_decode_csd(card); |
| if (err) |
| goto free_card; |
| err = mmc_decode_cid(card); |
| if (err) |
| goto free_card; |
| } |
| |
| /* |
| * 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)) { |
| err = mmc_select_card(card); |
| if (err) |
| goto free_card; |
| } |
| |
| if (!oldcard) { |
| /* Read extended CSD. */ |
| err = mmc_read_ext_csd(card); |
| if (err) |
| goto free_card; |
| |
| /* |
| * If doing byte addressing, check if required to do sector |
| * addressing. Handle the case of <2GB cards needing sector |
| * addressing. See section 8.1 JEDEC Standard JED84-A441; |
| * ocr register has bit 30 set for sector addressing. |
| */ |
| if (rocr & BIT(30)) |
| mmc_card_set_blockaddr(card); |
| |
| /* Erase size depends on CSD and Extended CSD */ |
| mmc_set_erase_size(card); |
| } |
| |
| /* |
| * 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.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, |
| card->ext_csd.generic_cmd6_time); |
| |
| if (err && err != -EBADMSG) |
| goto free_card; |
| |
| if (err) { |
| err = 0; |
| /* |
| * Just disable enhanced area off & sz |
| * will try to enable ERASE_GROUP_DEF |
| * during next time reinit |
| */ |
| card->ext_csd.enhanced_area_offset = -EINVAL; |
| card->ext_csd.enhanced_area_size = -EINVAL; |
| } else { |
| card->ext_csd.erase_group_def = 1; |
| /* |
| * enable ERASE_GRP_DEF successfully. |
| * This will affect the erase size, so |
| * here need to reset erase size |
| */ |
| mmc_set_erase_size(card); |
| } |
| } |
| |
| /* |
| * Ensure eMMC user default partition is enabled |
| */ |
| if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) { |
| card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, |
| card->ext_csd.part_config, |
| card->ext_csd.part_time); |
| if (err && err != -EBADMSG) |
| goto free_card; |
| } |
| |
| /* |
| * Enable power_off_notification byte in the ext_csd register |
| */ |
| if (card->ext_csd.rev >= 6) { |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_POWER_OFF_NOTIFICATION, |
| EXT_CSD_POWER_ON, |
| card->ext_csd.generic_cmd6_time); |
| if (err && err != -EBADMSG) |
| goto free_card; |
| |
| /* |
| * The err can be -EBADMSG or 0, |
| * so check for success and update the flag |
| */ |
| if (!err) |
| card->ext_csd.power_off_notification = EXT_CSD_POWER_ON; |
| } |
| |
| /* |
| * Select timing interface |
| */ |
| err = mmc_select_timing(card); |
| if (err) |
| goto free_card; |
| |
| if (mmc_card_hs200(card)) { |
| err = mmc_hs200_tuning(card); |
| if (err) |
| goto free_card; |
| |
| err = mmc_select_hs400(card); |
| if (err) |
| goto free_card; |
| } else if (mmc_card_hs(card)) { |
| /* Select the desired bus width optionally */ |
| err = mmc_select_bus_width(card); |
| if (err > 0) { |
| err = mmc_select_hs_ddr(card); |
| if (err) |
| goto free_card; |
| } |
| } |
| |
| /* |
| * Choose the power class with selected bus interface |
| */ |
| mmc_select_powerclass(card); |
| |
| /* |
| * Enable HPI feature (if supported) |
| */ |
| if (card->ext_csd.hpi) { |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_HPI_MGMT, 1, |
| card->ext_csd.generic_cmd6_time); |
| if (err && err != -EBADMSG) |
| goto free_card; |
| if (err) { |
| pr_warn("%s: Enabling HPI failed\n", |
| mmc_hostname(card->host)); |
| err = 0; |
| } else |
| card->ext_csd.hpi_en = 1; |
| } |
| |
| /* |
| * If cache size is higher than 0, this indicates |
| * the existence of cache and it can be turned on. |
| */ |
| if (!mmc_card_broken_hpi(card) && |
| 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); |
| if (err && err != -EBADMSG) |
| goto free_card; |
| |
| /* |
| * Only if no error, cache is turned on successfully. |
| */ |
| if (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 { |
| card->ext_csd.cache_ctrl = 1; |
| } |
| } |
| |
| /* |
| * The mandatory minimum values are defined for packed command. |
| * read: 5, write: 3 |
| */ |
| if (card->ext_csd.max_packed_writes >= 3 && |
| card->ext_csd.max_packed_reads >= 5 && |
| host->caps2 & MMC_CAP2_PACKED_CMD) { |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_EXP_EVENTS_CTRL, |
| EXT_CSD_PACKED_EVENT_EN, |
| card->ext_csd.generic_cmd6_time); |
| if (err && err != -EBADMSG) |
| goto free_card; |
| if (err) { |
| pr_warn("%s: Enabling packed event failed\n", |
| mmc_hostname(card->host)); |
| card->ext_csd.packed_event_en = 0; |
| err = 0; |
| } else { |
| card->ext_csd.packed_event_en = 1; |
| } |
| } |
| |
| if (!oldcard) |
| host->card = card; |
| |
| return 0; |
| |
| free_card: |
| if (!oldcard) |
| mmc_remove_card(card); |
| err: |
| 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; |
| } |
| |
| static int mmc_can_poweroff_notify(const struct mmc_card *card) |
| { |
| return card && |
| mmc_card_mmc(card) && |
| (card->ext_csd.power_off_notification == EXT_CSD_POWER_ON); |
| } |
| |
| static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type) |
| { |
| unsigned int timeout = card->ext_csd.generic_cmd6_time; |
| int err; |
| |
| /* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */ |
| 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, true, false, false); |
| if (err) |
| pr_err("%s: Power Off Notification timed out, %u\n", |
| mmc_hostname(card->host), timeout); |
| |
| /* Disable the power off notification after the switch operation. */ |
| card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION; |
| |
| return err; |
| } |
| |
| /* |
| * Host is being removed. Free up the current card. |
| */ |
| static void mmc_remove(struct mmc_host *host) |
| { |
| BUG_ON(!host); |
| BUG_ON(!host->card); |
| |
| mmc_remove_card(host->card); |
| host->card = NULL; |
| } |
| |
| /* |
| * Card detection - card is alive. |
| */ |
| static int mmc_alive(struct mmc_host *host) |
| { |
| return mmc_send_status(host->card, NULL); |
| } |
| |
| /* |
| * Card detection callback from host. |
| */ |
| static void mmc_detect(struct mmc_host *host) |
| { |
| int err; |
| |
| BUG_ON(!host); |
| BUG_ON(!host->card); |
| |
| mmc_get_card(host->card); |
| |
| /* |
| * Just check if our card has been removed. |
| */ |
| err = _mmc_detect_card_removed(host); |
| |
| mmc_put_card(host->card); |
| |
| if (err) { |
| mmc_remove(host); |
| |
| mmc_claim_host(host); |
| mmc_detach_bus(host); |
| mmc_power_off(host); |
| mmc_release_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); |
| |
| 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) && |
| ((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); |
| |
| if (!err) { |
| mmc_power_off(host); |
| mmc_card_set_suspended(host->card); |
| } |
| out: |
| mmc_release_host(host); |
| return err; |
| } |
| |
| /* |
| * 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) |
| { |
| int err = 0; |
| |
| BUG_ON(!host); |
| BUG_ON(!host->card); |
| |
| mmc_claim_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; |
| } |
| |
| /* |
| * Shutdown callback |
| */ |
| static int mmc_shutdown(struct mmc_host *host) |
| { |
| int err = 0; |
| |
| /* |
| * 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); |
| |
| if (!err) |
| err = _mmc_suspend(host, false); |
| |
| return err; |
| } |
| |
| /* |
| * Callback for resume. |
| */ |
| static int mmc_resume(struct mmc_host *host) |
| { |
| pm_runtime_enable(&host->card->dev); |
| return 0; |
| } |
| |
| /* |
| * Callback for runtime_suspend. |
| */ |
| static int mmc_runtime_suspend(struct mmc_host *host) |
| { |
| int 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; |
| } |
| |
| /* |
| * Callback for runtime_resume. |
| */ |
| static int mmc_runtime_resume(struct mmc_host *host) |
| { |
| int err; |
| |
| err = _mmc_resume(host); |
| if (err && err != -ENOMEDIUM) |
| pr_err("%s: error %d doing runtime 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; |
| |
| /* |
| * In the case of recovery, we can't expect flushing the cache to work |
| * always, but we have a go and ignore errors. |
| */ |
| mmc_flush_cache(host->card); |
| |
| if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset && |
| mmc_can_reset(card)) { |
| /* If the card accept RST_n signal, send it. */ |
| 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); |
| } else { |
| /* Do a brute force power cycle */ |
| mmc_power_cycle(host, card->ocr); |
| } |
| 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, |
| .runtime_suspend = mmc_runtime_suspend, |
| .runtime_resume = mmc_runtime_resume, |
| .alive = mmc_alive, |
| .shutdown = mmc_shutdown, |
| .reset = mmc_reset, |
| }; |
| |
| /* |
| * Starting point for MMC card init. |
| */ |
| int mmc_attach_mmc(struct mmc_host *host) |
| { |
| int err; |
| u32 ocr, rocr; |
| |
| BUG_ON(!host); |
| WARN_ON(!host->claimed); |
| |
| /* Set correct bus mode for MMC before attempting attach */ |
| if (!mmc_host_is_spi(host)) |
| mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN); |
| |
| err = mmc_send_op_cond(host, 0, &ocr); |
| if (err) |
| return err; |
| |
| mmc_attach_bus(host, &mmc_ops); |
| if (host->ocr_avail_mmc) |
| host->ocr_avail = host->ocr_avail_mmc; |
| |
| /* |
| * We need to get OCR a different way for SPI. |
| */ |
| if (mmc_host_is_spi(host)) { |
| err = mmc_spi_read_ocr(host, 1, &ocr); |
| if (err) |
| goto err; |
| } |
| |
| rocr = mmc_select_voltage(host, ocr); |
| |
| /* |
| * Can we support the voltage of the card? |
| */ |
| if (!rocr) { |
| err = -EINVAL; |
| goto err; |
| } |
| |
| /* |
| * Detect and init the card. |
| */ |
| err = mmc_init_card(host, rocr, NULL); |
| if (err) |
| goto err; |
| |
| mmc_release_host(host); |
| err = mmc_add_card(host->card); |
| if (err) |
| goto remove_card; |
| |
| mmc_claim_host(host); |
| return 0; |
| |
| remove_card: |
| mmc_remove_card(host->card); |
| mmc_claim_host(host); |
| host->card = NULL; |
| err: |
| mmc_detach_bus(host); |
| |
| pr_err("%s: error %d whilst initialising MMC card\n", |
| mmc_hostname(host), err); |
| |
| return err; |
| } |