forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2287 lines
60 KiB
2287 lines
60 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* 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. |
|
*/ |
|
|
|
#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 "card.h" |
|
#include "host.h" |
|
#include "bus.h" |
|
#include "mmc_ops.h" |
|
#include "quirks.h" |
|
#include "sd_ops.h" |
|
#include "pwrseq.h" |
|
|
|
#define DEFAULT_CMD6_TIMEOUT_MS 500 |
|
#define MIN_CACHE_EN_TIMEOUT_MS 1600 |
|
|
|
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 taac_exp[] = { |
|
1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, |
|
}; |
|
|
|
static const unsigned int taac_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.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->taac_ns = (taac_exp[e] * taac_mant[m] + 9) / 10; |
|
csd->taac_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 | MMC_CAP_3_3V_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_part_add(struct mmc_card *card, u64 size, |
|
unsigned int part_cfg, char *name, int idx, bool ro, |
|
int area_type) |
|
{ |
|
card->part[card->nr_parts].size = size; |
|
card->part[card->nr_parts].part_cfg = part_cfg; |
|
sprintf(card->part[card->nr_parts].name, name, idx); |
|
card->part[card->nr_parts].force_ro = ro; |
|
card->part[card->nr_parts].area_type = area_type; |
|
card->nr_parts++; |
|
} |
|
|
|
static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) |
|
{ |
|
int idx; |
|
u8 hc_erase_grp_sz, hc_wp_grp_sz; |
|
u64 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 *= (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; |
|
u64 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]; |
|
|
|
/* 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 (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 set\n", |
|
mmc_hostname(card->host)); |
|
card->ext_csd.auto_bkops_en = |
|
(ext_csd[EXT_CSD_BKOPS_EN] & |
|
EXT_CSD_AUTO_BKOPS_MASK); |
|
if (card->ext_csd.auto_bkops_en) |
|
pr_debug("%s: AUTO_BKOPS_EN bit is 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 */ |
|
card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS; |
|
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; |
|
} |
|
|
|
/* |
|
* GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined |
|
* when accessing a specific field", so use it here if there is no |
|
* PARTITION_SWITCH_TIME. |
|
*/ |
|
if (!card->ext_csd.part_time) |
|
card->ext_csd.part_time = card->ext_csd.generic_cmd6_time; |
|
/* Some eMMC set the value too low so set a minimum */ |
|
if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME) |
|
card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME; |
|
|
|
/* 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); |
|
|
|
card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO]; |
|
card->ext_csd.device_life_time_est_typ_a = |
|
ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]; |
|
card->ext_csd.device_life_time_est_typ_b = |
|
ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]; |
|
} |
|
|
|
/* eMMC v5.1 or later */ |
|
if (card->ext_csd.rev >= 8) { |
|
card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] & |
|
EXT_CSD_CMDQ_SUPPORTED; |
|
card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] & |
|
EXT_CSD_CMDQ_DEPTH_MASK) + 1; |
|
/* Exclude inefficiently small queue depths */ |
|
if (card->ext_csd.cmdq_depth <= 2) { |
|
card->ext_csd.cmdq_support = false; |
|
card->ext_csd.cmdq_depth = 0; |
|
} |
|
if (card->ext_csd.cmdq_support) { |
|
pr_debug("%s: Command Queue supported depth %u\n", |
|
mmc_hostname(card->host), |
|
card->ext_csd.cmdq_depth); |
|
} |
|
card->ext_csd.enhanced_rpmb_supported = |
|
(card->ext_csd.rel_param & |
|
EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR); |
|
} |
|
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(rev, "0x%x\n", card->ext_csd.rev); |
|
MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info); |
|
MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n", |
|
card->ext_csd.device_life_time_est_typ_a, |
|
card->ext_csd.device_life_time_est_typ_b); |
|
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(enhanced_rpmb_supported, "%#x\n", |
|
card->ext_csd.enhanced_rpmb_supported); |
|
MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); |
|
MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr); |
|
MMC_DEV_ATTR(rca, "0x%04x\n", card->rca); |
|
MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en); |
|
|
|
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_rev.attr, |
|
&dev_attr_pre_eol_info.attr, |
|
&dev_attr_life_time.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_enhanced_rpmb_supported.attr, |
|
&dev_attr_rel_sectors.attr, |
|
&dev_attr_ocr.attr, |
|
&dev_attr_rca.attr, |
|
&dev_attr_dsr.attr, |
|
&dev_attr_cmdq_en.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; |
|
} |
|
|
|
/* |
|
* 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, MMC_TIMING_MMC_HS, |
|
true, true); |
|
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, |
|
MMC_TIMING_MMC_DDR52, |
|
true, true); |
|
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 |
|
*/ |
|
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) { |
|
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); |
|
if (!err) |
|
return 0; |
|
} |
|
|
|
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V && |
|
host->caps & MMC_CAP_1_8V_DDR) |
|
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); |
|
|
|
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, 0, |
|
false, true); |
|
if (err) { |
|
pr_err("%s: switch to high-speed from hs200 failed, err:%d\n", |
|
mmc_hostname(host), err); |
|
return err; |
|
} |
|
|
|
/* Prepare host to downgrade to HS timing */ |
|
if (host->ops->hs400_downgrade) |
|
host->ops->hs400_downgrade(host); |
|
|
|
/* Set host controller to HS timing */ |
|
mmc_set_timing(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, true); |
|
if (err) |
|
goto out_err; |
|
|
|
if (host->ops->hs400_prepare_ddr) |
|
host->ops->hs400_prepare_ddr(host); |
|
|
|
/* 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, 0, |
|
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); |
|
|
|
if (host->ops->hs400_complete) |
|
host->ops->hs400_complete(host); |
|
|
|
err = mmc_switch_status(card, true); |
|
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, 0, |
|
false, true); |
|
if (err) |
|
goto out_err; |
|
|
|
if (host->ops->hs400_downgrade) |
|
host->ops->hs400_downgrade(host); |
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_DDR52); |
|
|
|
err = mmc_switch_status(card, true); |
|
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, |
|
0, false, true); |
|
if (err) |
|
goto out_err; |
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_HS); |
|
|
|
err = mmc_switch_status(card, true); |
|
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, 0, |
|
false, true); |
|
if (err) |
|
goto out_err; |
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_HS200); |
|
|
|
/* |
|
* For HS200, CRC errors are not a reliable way to know the switch |
|
* failed. If there really is a problem, we would expect tuning will |
|
* fail and the result ends up the same. |
|
*/ |
|
err = mmc_switch_status(card, false); |
|
if (err) |
|
goto out_err; |
|
|
|
mmc_set_bus_speed(card); |
|
|
|
/* Prepare tuning for HS400 mode. */ |
|
if (host->ops->prepare_hs400_tuning) |
|
host->ops->prepare_hs400_tuning(host, &host->ios); |
|
|
|
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 = 0; |
|
int fixed_drv_type = card->host->fixed_drv_type; |
|
|
|
card_drv_type = card->ext_csd.raw_driver_strength | |
|
mmc_driver_type_mask(0); |
|
|
|
if (fixed_drv_type >= 0) |
|
drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type) |
|
? fixed_drv_type : 0; |
|
else |
|
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); |
|
} |
|
|
|
static int mmc_select_hs400es(struct mmc_card *card) |
|
{ |
|
struct mmc_host *host = card->host; |
|
int err = -EINVAL; |
|
u8 val; |
|
|
|
if (!(host->caps & MMC_CAP_8_BIT_DATA)) { |
|
err = -ENOTSUPP; |
|
goto out_err; |
|
} |
|
|
|
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V) |
|
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120); |
|
|
|
if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V) |
|
err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180); |
|
|
|
/* If fails try again during next card power cycle */ |
|
if (err) |
|
goto out_err; |
|
|
|
err = mmc_select_bus_width(card); |
|
if (err != MMC_BUS_WIDTH_8) { |
|
pr_err("%s: switch to 8bit bus width failed, err:%d\n", |
|
mmc_hostname(host), err); |
|
err = err < 0 ? err : -ENOTSUPP; |
|
goto out_err; |
|
} |
|
|
|
/* Switch card to HS mode */ |
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
|
EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS, |
|
card->ext_csd.generic_cmd6_time, 0, |
|
false, true); |
|
if (err) { |
|
pr_err("%s: switch to hs for hs400es failed, err:%d\n", |
|
mmc_hostname(host), err); |
|
goto out_err; |
|
} |
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_HS); |
|
err = mmc_switch_status(card, true); |
|
if (err) |
|
goto out_err; |
|
|
|
mmc_set_clock(host, card->ext_csd.hs_max_dtr); |
|
|
|
/* 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; |
|
} |
|
|
|
mmc_select_driver_type(card); |
|
|
|
/* 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, 0, |
|
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, true); |
|
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; |
|
} |
|
|
|
/* |
|
* 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, 0, |
|
false, true); |
|
if (err) |
|
goto err; |
|
old_timing = host->ios.timing; |
|
mmc_set_timing(host, MMC_TIMING_MMC_HS200); |
|
|
|
/* |
|
* For HS200, CRC errors are not a reliable way to know the |
|
* switch failed. If there really is a problem, we would expect |
|
* tuning will fail and the result ends up the same. |
|
*/ |
|
err = mmc_switch_status(card, false); |
|
|
|
/* |
|
* 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; |
|
|
|
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. |
|
*/ |
|
err = mmc_send_cid(host, cid); |
|
if (err) |
|
goto err; |
|
|
|
if (oldcard) { |
|
if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) { |
|
pr_debug("%s: Perhaps the card was replaced\n", |
|
mmc_hostname(host)); |
|
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); |
|
} |
|
|
|
/* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */ |
|
if (card->ext_csd.rev >= 3) { |
|
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) { |
|
/* |
|
* 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; |
|
} |
|
|
|
/* set erase_arg */ |
|
if (mmc_can_discard(card)) |
|
card->erase_arg = MMC_DISCARD_ARG; |
|
else if (mmc_can_trim(card)) |
|
card->erase_arg = MMC_TRIM_ARG; |
|
else |
|
card->erase_arg = MMC_ERASE_ARG; |
|
|
|
/* |
|
* Select timing interface |
|
*/ |
|
err = mmc_select_timing(card); |
|
if (err) |
|
goto free_card; |
|
|
|
if (mmc_card_hs200(card)) { |
|
host->doing_init_tune = 1; |
|
|
|
err = mmc_hs200_tuning(card); |
|
if (!err) |
|
err = mmc_select_hs400(card); |
|
|
|
host->doing_init_tune = 0; |
|
|
|
if (err) |
|
goto free_card; |
|
|
|
} else if (!mmc_card_hs400es(card)) { |
|
/* Select the desired bus width optionally */ |
|
err = mmc_select_bus_width(card); |
|
if (err > 0 && mmc_card_hs(card)) { |
|
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)); |
|
card->ext_csd.hpi_en = 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. Note that some eMMCs from Micron has been |
|
* reported to need ~800 ms timeout, while enabling the cache after |
|
* sudden power failure tests. Let's extend the timeout to a minimum of |
|
* DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards. |
|
*/ |
|
if (card->ext_csd.cache_size > 0) { |
|
unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS; |
|
|
|
timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms); |
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, |
|
EXT_CSD_CACHE_CTRL, 1, timeout_ms); |
|
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; |
|
} else { |
|
card->ext_csd.cache_ctrl = 1; |
|
} |
|
} |
|
|
|
/* |
|
* Enable Command Queue if supported. Note that Packed Commands cannot |
|
* be used with Command Queue. |
|
*/ |
|
card->ext_csd.cmdq_en = false; |
|
if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) { |
|
err = mmc_cmdq_enable(card); |
|
if (err && err != -EBADMSG) |
|
goto free_card; |
|
if (err) { |
|
pr_warn("%s: Enabling CMDQ failed\n", |
|
mmc_hostname(card->host)); |
|
card->ext_csd.cmdq_support = false; |
|
card->ext_csd.cmdq_depth = 0; |
|
} |
|
} |
|
/* |
|
* In some cases (e.g. RPMB or mmc_test), the Command Queue must be |
|
* disabled for a time, so a flag is needed to indicate to re-enable the |
|
* Command Queue. |
|
*/ |
|
card->reenable_cmdq = card->ext_csd.cmdq_en; |
|
|
|
if (host->cqe_ops && !host->cqe_enabled) { |
|
err = host->cqe_ops->cqe_enable(host, card); |
|
if (!err) { |
|
host->cqe_enabled = true; |
|
|
|
if (card->ext_csd.cmdq_en) { |
|
pr_info("%s: Command Queue Engine enabled\n", |
|
mmc_hostname(host)); |
|
} else { |
|
host->hsq_enabled = true; |
|
pr_info("%s: Host Software Queue enabled\n", |
|
mmc_hostname(host)); |
|
} |
|
} |
|
} |
|
|
|
if (host->caps2 & MMC_CAP2_AVOID_3_3V && |
|
host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) { |
|
pr_err("%s: Host failed to negotiate down from 3.3V\n", |
|
mmc_hostname(host)); |
|
err = -EINVAL; |
|
goto free_card; |
|
} |
|
|
|
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->ext_csd.rev >= 3; |
|
} |
|
|
|
static int mmc_sleep(struct mmc_host *host) |
|
{ |
|
struct mmc_command cmd = {}; |
|
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. Note, some hosts requires R1B, which also |
|
* means they are on their own when it comes to deal with the busy |
|
* timeout. |
|
*/ |
|
if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && 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, 0, 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) |
|
{ |
|
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; |
|
|
|
mmc_get_card(host->card, NULL); |
|
|
|
/* |
|
* Just check if our card has been removed. |
|
*/ |
|
err = _mmc_detect_card_removed(host); |
|
|
|
mmc_put_card(host->card, NULL); |
|
|
|
if (err) { |
|
mmc_remove(host); |
|
|
|
mmc_claim_host(host); |
|
mmc_detach_bus(host); |
|
mmc_power_off(host); |
|
mmc_release_host(host); |
|
} |
|
} |
|
|
|
static bool _mmc_cache_enabled(struct mmc_host *host) |
|
{ |
|
return host->card->ext_csd.cache_size > 0 && |
|
host->card->ext_csd.cache_ctrl & 1; |
|
} |
|
|
|
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; |
|
|
|
mmc_claim_host(host); |
|
|
|
if (mmc_card_suspended(host->card)) |
|
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 || |
|
(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE_IN_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; |
|
|
|
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; |
|
} |
|
|
|
static 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; |
|
} |
|
|
|
static int _mmc_hw_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); |
|
mmc_pwrseq_reset(host); |
|
} |
|
return mmc_init_card(host, card->ocr, card); |
|
} |
|
|
|
static const struct mmc_bus_ops mmc_ops = { |
|
.remove = mmc_remove, |
|
.detect = mmc_detect, |
|
.suspend = mmc_suspend, |
|
.resume = mmc_resume, |
|
.runtime_suspend = mmc_runtime_suspend, |
|
.runtime_resume = mmc_runtime_resume, |
|
.alive = mmc_alive, |
|
.shutdown = mmc_shutdown, |
|
.hw_reset = _mmc_hw_reset, |
|
.cache_enabled = _mmc_cache_enabled, |
|
}; |
|
|
|
/* |
|
* Starting point for MMC card init. |
|
*/ |
|
int mmc_attach_mmc(struct mmc_host *host) |
|
{ |
|
int err; |
|
u32 ocr, rocr; |
|
|
|
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; |
|
}
|
|
|