diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/mmc/core/mmc.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/mmc/core/mmc.c | 1553 |
1 files changed, 0 insertions, 1553 deletions
diff --git a/ANDROID_3.4.5/drivers/mmc/core/mmc.c b/ANDROID_3.4.5/drivers/mmc/core/mmc.c deleted file mode 100644 index 0eb26c64..00000000 --- a/ANDROID_3.4.5/drivers/mmc/core/mmc.c +++ /dev/null @@ -1,1553 +0,0 @@ -/* - * 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) { - pr_err("%s: unrecognised EXT_CSD revision %d\n", - mmc_hostname(card->host), card->ext_csd.rev); - err = -EINVAL; - goto out; - } - - card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0]; - card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1]; - 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 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; - } - } - -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 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 (!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; -} - -/* - * 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_claim_host(host); - - /* - * Just check if our card has been removed. - */ - err = _mmc_detect_card_removed(host); - - mmc_release_host(host); -#ifdef CONFIG_MMC_UNSAFE_RESUME - if (err || (host->card_attath_status == card_attach_status_change)) { - host->card_attath_status = card_attach_status_unchange; - mmc_remove(host); - - mmc_claim_host(host); - mmc_detach_bus(host); - mmc_power_off(host); - mmc_release_host(host); - } -#else - if (err) { - mmc_remove(host); - - mmc_claim_host(host); - mmc_detach_bus(host); - mmc_power_off(host); - mmc_release_host(host); - } -#endif -} - -/* - * 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); - if (mmc_card_can_sleep(host)) { - err = mmc_card_sleep(host); - if (!err) - mmc_card_set_sleep(host->card); - } else if (!mmc_host_is_spi(host)) - mmc_deselect_cards(host); - 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)) { - err = mmc_card_awake(host); - mmc_card_clr_sleep(host->card); - } else - err = mmc_init_card(host, host->ocr, host->card); - mmc_release_host(host); - -#ifdef CONFIG_MMC_UNSAFE_RESUME - if (err) - host->card_attath_status = card_attach_status_change; -#endif - - 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, -}; - -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, -}; - -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; -} |