| /* |
| * 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/slab.h> |
| #include <linux/stat.h> |
| |
| #include <linux/mmc/host.h> |
| #include <linux/mmc/card.h> |
| #include <linux/mmc/mmc.h> |
| |
| #include "core.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, |
| }; |
| |
| #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.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->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; |
| } |
| |
| /* |
| * Read extended CSD. |
| */ |
| static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd) |
| { |
| int err; |
| u8 *ext_csd; |
| |
| BUG_ON(!card); |
| BUG_ON(!new_ext_csd); |
| |
| *new_ext_csd = NULL; |
| |
| if (card->csd.mmca_vsn < CSD_SPEC_VER_4) |
| return 0; |
| |
| /* |
| * 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; |
| } |
| |
| err = mmc_send_ext_csd(card, ext_csd); |
| if (err) { |
| kfree(ext_csd); |
| *new_ext_csd = NULL; |
| |
| /* 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_warning("%s: unable to read " |
| "EXT_CSD, performance might " |
| "suffer.\n", |
| mmc_hostname(card->host)); |
| err = 0; |
| } |
| } else |
| *new_ext_csd = ext_csd; |
| |
| return err; |
| } |
| |
| /* |
| * Decode extended CSD. |
| */ |
| static int mmc_read_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; |
| |
| /* 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; |
| } |
| } |
| |
| card->ext_csd.rev = ext_csd[EXT_CSD_REV]; |
| if (card->ext_csd.rev > 6) { |
| printk(KERN_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]; |
| 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.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE]; |
| switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) { |
| case EXT_CSD_CARD_TYPE_SDR_ALL: |
| case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_8V: |
| case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_2V: |
| case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_52: |
| card->ext_csd.hs_max_dtr = 200000000; |
| card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_200; |
| break; |
| case EXT_CSD_CARD_TYPE_SDR_1_2V_ALL: |
| case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_8V: |
| case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_2V: |
| case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_52: |
| card->ext_csd.hs_max_dtr = 200000000; |
| card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_2V; |
| break; |
| case EXT_CSD_CARD_TYPE_SDR_1_8V_ALL: |
| case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_8V: |
| case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_2V: |
| case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_52: |
| card->ext_csd.hs_max_dtr = 200000000; |
| card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_8V; |
| break; |
| case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 | |
| EXT_CSD_CARD_TYPE_26: |
| card->ext_csd.hs_max_dtr = 52000000; |
| card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52; |
| break; |
| case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 | |
| EXT_CSD_CARD_TYPE_26: |
| card->ext_csd.hs_max_dtr = 52000000; |
| card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V; |
| break; |
| case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 | |
| EXT_CSD_CARD_TYPE_26: |
| card->ext_csd.hs_max_dtr = 52000000; |
| card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V; |
| break; |
| case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26: |
| card->ext_csd.hs_max_dtr = 52000000; |
| break; |
| case EXT_CSD_CARD_TYPE_26: |
| card->ext_csd.hs_max_dtr = 26000000; |
| break; |
| default: |
| /* MMC v4 spec says this cannot happen */ |
| pr_warning("%s: card is mmc v4 but doesn't " |
| "support any high-speed modes.\n", |
| mmc_hostname(card->host)); |
| } |
| |
| 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]; |
| |
| /* 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]; |
| 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. |
| */ |
| card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; |
| 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; |
| } |
| |
| /* |
| * 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]; |
| |
| card->ext_csd.enhanced_area_en = 1; |
| } |
| |
| 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 = |
| 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; |
| } |
| |
| if (card->ext_csd.rev >= 5) { |
| /* check whether the eMMC card support 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.raw_bkops_status = |
| ext_csd[EXT_CSD_BKOPS_STATUS]; |
| if (!card->ext_csd.bkops_en && |
| card->host->caps2 & MMC_CAP2_INIT_BKOPS) { |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_BKOPS_EN, 1, 0); |
| if (err) |
| pr_warning("%s: Enabling BKOPS failed\n", |
| mmc_hostname(card->host)); |
| else |
| card->ext_csd.bkops_en = 1; |
| } |
| } |
| |
| /* check whether the eMMC card supports HPI */ |
| if (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]; |
| } |
| |
| 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]; |
| } |
| |
| out: |
| return err; |
| } |
| |
| static inline void mmc_free_ext_csd(u8 *ext_csd) |
| { |
| kfree(ext_csd); |
| } |
| |
| |
| 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 || bw_ext_csd == NULL) { |
| if (bus_width != MMC_BUS_WIDTH_1) |
| err = -EINVAL; |
| goto out; |
| } |
| |
| if (bus_width == MMC_BUS_WIDTH_1) |
| goto out; |
| |
| /* 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])); |
| if (err) |
| err = -EINVAL; |
| |
| out: |
| mmc_free_ext_csd(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(fwrev, "0x%x\n", card->cid.fwrev); |
| 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(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); |
| |
| 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_hwrev.attr, |
| &dev_attr_manfid.attr, |
| &dev_attr_name.attr, |
| &dev_attr_oemid.attr, |
| &dev_attr_serial.attr, |
| &dev_attr_enhanced_area_offset.attr, |
| &dev_attr_enhanced_area_size.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, |
| }; |
| |
| static struct device_type mmc_type = { |
| .groups = mmc_attr_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, u8 *ext_csd) |
| { |
| 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; |
| 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 <= 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; |
| break; |
| default: |
| pr_warning("%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; |
| 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; |
| } |
| |
| /* |
| * Selects the desired buswidth and switch to the HS200 mode |
| * if bus width set without error |
| */ |
| static int mmc_select_hs200(struct mmc_card *card) |
| { |
| int idx, err = 0; |
| struct mmc_host *host; |
| static unsigned ext_csd_bits[] = { |
| EXT_CSD_BUS_WIDTH_4, |
| EXT_CSD_BUS_WIDTH_8, |
| }; |
| static unsigned bus_widths[] = { |
| MMC_BUS_WIDTH_4, |
| MMC_BUS_WIDTH_8, |
| }; |
| |
| 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) |
| if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0)) |
| err = mmc_set_signal_voltage(host, |
| MMC_SIGNAL_VOLTAGE_180, 0); |
| |
| /* If fails try again during next card power cycle */ |
| if (err) |
| goto err; |
| |
| idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0; |
| |
| /* |
| * 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 >= 0; 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; |
| |
| mmc_set_bus_width(card->host, bus_widths[idx]); |
| |
| if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST)) |
| err = mmc_compare_ext_csds(card, bus_widths[idx]); |
| else |
| err = mmc_bus_test(card, bus_widths[idx]); |
| if (!err) |
| break; |
| } |
| |
| /* switch to HS200 mode if bus width set successfully */ |
| if (!err) |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_HS_TIMING, 2, 0); |
| err: |
| return err; |
| } |
| |
| /* |
| * 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, ddr = 0; |
| u32 cid[4]; |
| unsigned int max_dtr; |
| u32 rocr; |
| u8 *ext_csd = NULL; |
| |
| 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); |
| |
| /* Initialization should be done at 3.3 V I/O voltage. */ |
| mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0); |
| |
| /* |
| * 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->type = MMC_TYPE_MMC; |
| card->rca = 1; |
| memcpy(card->raw_cid, cid, sizeof(card->raw_cid)); |
| } |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * 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) { |
| /* |
| * 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); |
| 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 (!(mmc_card_blockaddr(card)) && (rocr & (1<<30))) |
| mmc_card_set_blockaddr(card); |
| |
| /* Erase size depends on CSD and Extended CSD */ |
| mmc_set_erase_size(card); |
| |
| if (card->ext_csd.sectors && (rocr & MMC_CARD_SECTOR_ADDR)) |
| mmc_card_set_blockaddr(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.enhanced_area_en || |
| (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; |
| } |
| |
| /* |
| * If the host supports the power_off_notify capability then |
| * set the notification byte in the ext_csd register of device |
| */ |
| if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) && |
| (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->poweroff_notify_state = MMC_POWERED_ON; |
| } |
| |
| /* |
| * Activate high speed (if supported) |
| */ |
| 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); |
| |
| if (err && err != -EBADMSG) |
| 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); |
| } |
| } |
| } |
| |
| /* |
| * 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; |
| } 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). |
| */ |
| 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, 0); |
| 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); |
| } |
| } |
| |
| /* |
| * 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_warning("%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 ((host->caps2 & MMC_CAP2_CACHE_CTRL) && |
| 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_warning("%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; |
| } |
| } |
| |
| if ((host->caps2 & MMC_CAP2_PACKED_CMD) && |
| (card->ext_csd.max_packed_writes > 0) && |
| (card->ext_csd.max_packed_reads > 0)) { |
| 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_warning("%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) { |
| if ((host->caps2 & MMC_CAP2_PACKED_CMD) && |
| (card->ext_csd.max_packed_writes > 0)) { |
| /* |
| * We would like to keep the statistics in an index |
| * that equals the num of packed requests |
| * (1 to max_packed_writes) |
| */ |
| card->wr_pack_stats.packing_events = kzalloc( |
| (card->ext_csd.max_packed_writes + 1) * |
| sizeof(*card->wr_pack_stats.packing_events), |
| GFP_KERNEL); |
| if (!card->wr_pack_stats.packing_events) |
| goto free_card; |
| } |
| } |
| |
| if (!oldcard) |
| host->card = card; |
| |
| mmc_free_ext_csd(ext_csd); |
| return 0; |
| |
| free_card: |
| if (!oldcard) |
| mmc_remove_card(card); |
| err: |
| mmc_free_ext_csd(ext_csd); |
| |
| return err; |
| } |
| |
| static int mmc_poweroff_notify(struct mmc_host *host, int notify) |
| { |
| struct mmc_card *card; |
| unsigned int timeout; |
| unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION; |
| int err; |
| |
| card = host->card; |
| |
| if (notify == MMC_PW_OFF_NOTIFY_SHORT) { |
| notify_type = EXT_CSD_POWER_OFF_SHORT; |
| timeout = card->ext_csd.generic_cmd6_time; |
| } else if (notify == MMC_PW_OFF_NOTIFY_LONG) { |
| notify_type = EXT_CSD_POWER_OFF_LONG; |
| timeout = card->ext_csd.power_off_longtime; |
| } else { |
| pr_info("%s: mmc_poweroff_notify called " |
| "with notify type %d\n", mmc_hostname(host), notify); |
| return -EINVAL; |
| } |
| |
| err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
| EXT_CSD_POWER_OFF_NOTIFICATION, |
| notify_type, timeout); |
| |
| if (err) |
| pr_err("%s: Device failed to respond within %d " |
| "poweroff timeout.\n", mmc_hostname(host), timeout); |
| else |
| card->poweroff_notify_state = |
| MMC_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); |
| |
| mmc_claim_host(host); |
| host->card = NULL; |
| mmc_release_host(host); |
| } |
| |
| /* |
| * 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_claim_host(host); |
| |
| /* |
| * Just check if our card has been removed. |
| */ |
| err = _mmc_detect_card_removed(host); |
| |
| mmc_release_host(host); |
| |
| if (err) { |
| mmc_remove(host); |
| |
| mmc_claim_host(host); |
| mmc_detach_bus(host); |
| mmc_power_off(host); |
| mmc_release_host(host); |
| } |
| } |
| |
| /* |
| * Save ios settings |
| */ |
| static void mmc_save_ios(struct mmc_host *host) |
| { |
| BUG_ON(!host); |
| |
| mmc_host_clk_hold(host); |
| |
| memcpy(&host->saved_ios, &host->ios, sizeof(struct mmc_ios)); |
| |
| mmc_host_clk_release(host); |
| } |
| |
| /* |
| * Restore ios setting |
| */ |
| static void mmc_restore_ios(struct mmc_host *host) |
| { |
| BUG_ON(!host); |
| |
| memcpy(&host->ios, &host->saved_ios, sizeof(struct mmc_ios)); |
| mmc_set_ios(host); |
| } |
| |
| /* |
| * Suspend callback from host. |
| */ |
| static int mmc_suspend(struct mmc_host *host) |
| { |
| int err = 0; |
| |
| BUG_ON(!host); |
| BUG_ON(!host->card); |
| |
| mmc_claim_host(host); |
| mmc_save_ios(host); |
| if (mmc_can_poweroff_notify(host->card) && |
| (host->caps2 & MMC_CAP2_POWER_OFF_VCCQ_DURING_SUSPEND)) { |
| err = mmc_poweroff_notify(host, MMC_PW_OFF_NOTIFY_SHORT); |
| } else { |
| if (mmc_card_can_sleep(host)) |
| err = mmc_card_sleep(host); |
| else if (!mmc_host_is_spi(host)) |
| mmc_deselect_cards(host); |
| } |
| if (!err) |
| host->card->state &= |
| ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200); |
| mmc_release_host(host); |
| |
| return err; |
| } |
| |
| /* |
| * Resume callback from host. |
| * |
| * 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; |
| |
| BUG_ON(!host); |
| BUG_ON(!host->card); |
| |
| mmc_claim_host(host); |
| if (mmc_card_is_sleep(host->card)) { |
| mmc_restore_ios(host); |
| err = mmc_card_awake(host); |
| } else |
| err = mmc_init_card(host, host->ocr, host->card); |
| mmc_release_host(host); |
| |
| return err; |
| } |
| |
| static int mmc_power_restore(struct mmc_host *host) |
| { |
| int ret; |
| |
| host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200); |
| mmc_card_clr_sleep(host->card); |
| mmc_claim_host(host); |
| ret = mmc_init_card(host, host->ocr, host->card); |
| mmc_release_host(host); |
| |
| return ret; |
| } |
| |
| static int mmc_sleep(struct mmc_host *host) |
| { |
| struct mmc_card *card = host->card; |
| int err = -ENOSYS; |
| |
| 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); |
| } |
| |
| return err; |
| } |
| |
| static int mmc_awake(struct mmc_host *host) |
| { |
| struct mmc_card *card = host->card; |
| int err = -ENOSYS; |
| |
| 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); |
| } |
| |
| 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, |
| .poweroff_notify = mmc_poweroff_notify, |
| }; |
| |
| static const struct mmc_bus_ops mmc_ops_unsafe = { |
| .awake = mmc_awake, |
| .sleep = mmc_sleep, |
| .remove = mmc_remove, |
| .detect = mmc_detect, |
| .suspend = mmc_suspend, |
| .resume = mmc_resume, |
| .power_restore = mmc_power_restore, |
| .alive = mmc_alive, |
| .poweroff_notify = mmc_poweroff_notify, |
| }; |
| |
| 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; |
| |
| 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_ops(host); |
| 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; |
| } |
| |
| /* |
| * 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); |
| |
| /* |
| * Can we support the voltage of the card? |
| */ |
| if (!host->ocr) { |
| err = -EINVAL; |
| goto err; |
| } |
| |
| /* |
| * Detect and init the card. |
| */ |
| err = mmc_init_card(host, host->ocr, NULL); |
| if (err) |
| goto err; |
| |
| mmc_release_host(host); |
| err = mmc_add_card(host->card); |
| mmc_claim_host(host); |
| if (err) |
| goto remove_card; |
| |
| return 0; |
| |
| remove_card: |
| mmc_release_host(host); |
| 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; |
| } |