![Ulf Hansson](/assets/img/avatar_default.png)
Since the ->reset() callback is implemented for MMC, the ->power_restore() callback has become redundant, let's remove it. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2035 lines
52 KiB
C
2035 lines
52 KiB
C
/*
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* linux/drivers/mmc/core/mmc.c
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*
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* Copyright (C) 2003-2004 Russell King, All Rights Reserved.
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* Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
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* MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/pm_runtime.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/mmc.h>
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#include "core.h"
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#include "host.h"
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#include "bus.h"
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#include "mmc_ops.h"
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#include "sd_ops.h"
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static const unsigned int tran_exp[] = {
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10000, 100000, 1000000, 10000000,
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0, 0, 0, 0
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};
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static const unsigned char tran_mant[] = {
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0, 10, 12, 13, 15, 20, 25, 30,
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35, 40, 45, 50, 55, 60, 70, 80,
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};
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static const unsigned int tacc_exp[] = {
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1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
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};
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static const unsigned int tacc_mant[] = {
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0, 10, 12, 13, 15, 20, 25, 30,
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35, 40, 45, 50, 55, 60, 70, 80,
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};
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#define UNSTUFF_BITS(resp,start,size) \
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({ \
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const int __size = size; \
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const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
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const int __off = 3 - ((start) / 32); \
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const int __shft = (start) & 31; \
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u32 __res; \
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\
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__res = resp[__off] >> __shft; \
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if (__size + __shft > 32) \
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__res |= resp[__off-1] << ((32 - __shft) % 32); \
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__res & __mask; \
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})
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/*
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* Given the decoded CSD structure, decode the raw CID to our CID structure.
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*/
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static int mmc_decode_cid(struct mmc_card *card)
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{
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u32 *resp = card->raw_cid;
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/*
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* The selection of the format here is based upon published
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* specs from sandisk and from what people have reported.
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*/
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switch (card->csd.mmca_vsn) {
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case 0: /* MMC v1.0 - v1.2 */
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case 1: /* MMC v1.4 */
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card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
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card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
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card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
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card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
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card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
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card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
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card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
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card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
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card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
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card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
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card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
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card->cid.month = UNSTUFF_BITS(resp, 12, 4);
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card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
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break;
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case 2: /* MMC v2.0 - v2.2 */
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case 3: /* MMC v3.1 - v3.3 */
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case 4: /* MMC v4 */
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card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
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card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
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card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
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card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
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card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
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card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
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card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
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card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
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card->cid.prv = UNSTUFF_BITS(resp, 48, 8);
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card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
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card->cid.month = UNSTUFF_BITS(resp, 12, 4);
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card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
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break;
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default:
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pr_err("%s: card has unknown MMCA version %d\n",
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mmc_hostname(card->host), card->csd.mmca_vsn);
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return -EINVAL;
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}
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return 0;
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}
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static void mmc_set_erase_size(struct mmc_card *card)
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{
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if (card->ext_csd.erase_group_def & 1)
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card->erase_size = card->ext_csd.hc_erase_size;
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else
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card->erase_size = card->csd.erase_size;
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mmc_init_erase(card);
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}
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/*
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* Given a 128-bit response, decode to our card CSD structure.
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*/
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static int mmc_decode_csd(struct mmc_card *card)
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{
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struct mmc_csd *csd = &card->csd;
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unsigned int e, m, a, b;
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u32 *resp = card->raw_csd;
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/*
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* We only understand CSD structure v1.1 and v1.2.
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* v1.2 has extra information in bits 15, 11 and 10.
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* We also support eMMC v4.4 & v4.41.
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*/
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csd->structure = UNSTUFF_BITS(resp, 126, 2);
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if (csd->structure == 0) {
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pr_err("%s: unrecognised CSD structure version %d\n",
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mmc_hostname(card->host), csd->structure);
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return -EINVAL;
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}
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csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
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m = UNSTUFF_BITS(resp, 115, 4);
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e = UNSTUFF_BITS(resp, 112, 3);
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csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
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csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
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m = UNSTUFF_BITS(resp, 99, 4);
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e = UNSTUFF_BITS(resp, 96, 3);
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csd->max_dtr = tran_exp[e] * tran_mant[m];
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csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
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e = UNSTUFF_BITS(resp, 47, 3);
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m = UNSTUFF_BITS(resp, 62, 12);
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csd->capacity = (1 + m) << (e + 2);
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csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
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csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
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csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
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csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
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csd->dsr_imp = UNSTUFF_BITS(resp, 76, 1);
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csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
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csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
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csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
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if (csd->write_blkbits >= 9) {
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a = UNSTUFF_BITS(resp, 42, 5);
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b = UNSTUFF_BITS(resp, 37, 5);
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csd->erase_size = (a + 1) * (b + 1);
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csd->erase_size <<= csd->write_blkbits - 9;
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}
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return 0;
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}
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static void mmc_select_card_type(struct mmc_card *card)
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{
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struct mmc_host *host = card->host;
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u8 card_type = card->ext_csd.raw_card_type;
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u32 caps = host->caps, caps2 = host->caps2;
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unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
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unsigned int avail_type = 0;
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if (caps & MMC_CAP_MMC_HIGHSPEED &&
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card_type & EXT_CSD_CARD_TYPE_HS_26) {
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hs_max_dtr = MMC_HIGH_26_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_HS_26;
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}
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if (caps & MMC_CAP_MMC_HIGHSPEED &&
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card_type & EXT_CSD_CARD_TYPE_HS_52) {
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hs_max_dtr = MMC_HIGH_52_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_HS_52;
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}
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if (caps & MMC_CAP_1_8V_DDR &&
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card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
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hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
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}
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if (caps & MMC_CAP_1_2V_DDR &&
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card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
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hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
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}
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if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
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card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
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hs200_max_dtr = MMC_HS200_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
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}
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if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
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card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
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hs200_max_dtr = MMC_HS200_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
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}
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if (caps2 & MMC_CAP2_HS400_1_8V &&
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card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
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hs200_max_dtr = MMC_HS200_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
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}
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if (caps2 & MMC_CAP2_HS400_1_2V &&
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card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
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hs200_max_dtr = MMC_HS200_MAX_DTR;
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avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
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}
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card->ext_csd.hs_max_dtr = hs_max_dtr;
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card->ext_csd.hs200_max_dtr = hs200_max_dtr;
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card->mmc_avail_type = avail_type;
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}
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static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
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{
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u8 hc_erase_grp_sz, hc_wp_grp_sz;
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/*
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* Disable these attributes by default
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*/
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card->ext_csd.enhanced_area_offset = -EINVAL;
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card->ext_csd.enhanced_area_size = -EINVAL;
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/*
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* Enhanced area feature support -- check whether the eMMC
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* card has the Enhanced area enabled. If so, export enhanced
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* area offset and size to user by adding sysfs interface.
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*/
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if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
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(ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
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if (card->ext_csd.partition_setting_completed) {
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hc_erase_grp_sz =
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ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
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hc_wp_grp_sz =
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ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
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/*
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* calculate the enhanced data area offset, in bytes
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*/
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card->ext_csd.enhanced_area_offset =
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(((unsigned long long)ext_csd[139]) << 24) +
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(((unsigned long long)ext_csd[138]) << 16) +
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(((unsigned long long)ext_csd[137]) << 8) +
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(((unsigned long long)ext_csd[136]));
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if (mmc_card_blockaddr(card))
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card->ext_csd.enhanced_area_offset <<= 9;
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/*
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* calculate the enhanced data area size, in kilobytes
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*/
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card->ext_csd.enhanced_area_size =
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(ext_csd[142] << 16) + (ext_csd[141] << 8) +
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ext_csd[140];
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card->ext_csd.enhanced_area_size *=
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(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
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card->ext_csd.enhanced_area_size <<= 9;
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} else {
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pr_warn("%s: defines enhanced area without partition setting complete\n",
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mmc_hostname(card->host));
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}
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}
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}
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static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
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{
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int idx;
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u8 hc_erase_grp_sz, hc_wp_grp_sz;
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unsigned int part_size;
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/*
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* General purpose partition feature support --
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* If ext_csd has the size of general purpose partitions,
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* set size, part_cfg, partition name in mmc_part.
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*/
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if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
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EXT_CSD_PART_SUPPORT_PART_EN) {
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hc_erase_grp_sz =
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ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
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hc_wp_grp_sz =
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ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
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for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
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if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
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!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
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!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
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continue;
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if (card->ext_csd.partition_setting_completed == 0) {
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pr_warn("%s: has partition size defined without partition complete\n",
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mmc_hostname(card->host));
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break;
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}
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part_size =
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(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
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<< 16) +
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(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
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<< 8) +
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ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
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part_size *= (size_t)(hc_erase_grp_sz *
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hc_wp_grp_sz);
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mmc_part_add(card, part_size << 19,
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EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
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"gp%d", idx, false,
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MMC_BLK_DATA_AREA_GP);
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}
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}
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}
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/*
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* Decode extended CSD.
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*/
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static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
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{
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int err = 0, idx;
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unsigned int part_size;
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struct device_node *np;
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bool broken_hpi = false;
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/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
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card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
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if (card->csd.structure == 3) {
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if (card->ext_csd.raw_ext_csd_structure > 2) {
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pr_err("%s: unrecognised EXT_CSD structure "
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"version %d\n", mmc_hostname(card->host),
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card->ext_csd.raw_ext_csd_structure);
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err = -EINVAL;
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goto out;
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}
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}
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np = mmc_of_find_child_device(card->host, 0);
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if (np && of_device_is_compatible(np, "mmc-card"))
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broken_hpi = of_property_read_bool(np, "broken-hpi");
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of_node_put(np);
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/*
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* The EXT_CSD format is meant to be forward compatible. As long
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* as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
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* are authorized, see JEDEC JESD84-B50 section B.8.
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*/
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card->ext_csd.rev = ext_csd[EXT_CSD_REV];
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card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
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card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
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card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
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card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
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if (card->ext_csd.rev >= 2) {
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card->ext_csd.sectors =
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ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
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ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
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ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
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ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
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/* Cards with density > 2GiB are sector addressed */
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if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
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mmc_card_set_blockaddr(card);
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}
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|
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card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
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mmc_select_card_type(card);
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|
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card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
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card->ext_csd.raw_erase_timeout_mult =
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ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
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card->ext_csd.raw_hc_erase_grp_size =
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ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
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if (card->ext_csd.rev >= 3) {
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u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
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card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
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|
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/* EXT_CSD value is in units of 10ms, but we store in ms */
|
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card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
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|
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/* Sleep / awake timeout in 100ns units */
|
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if (sa_shift > 0 && sa_shift <= 0x17)
|
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card->ext_csd.sa_timeout =
|
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1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
|
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card->ext_csd.erase_group_def =
|
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ext_csd[EXT_CSD_ERASE_GROUP_DEF];
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card->ext_csd.hc_erase_timeout = 300 *
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ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
|
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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_info("%s: MAN_BKOPS_EN bit is not set\n",
|
|
mmc_hostname(card->host));
|
|
}
|
|
|
|
/* check whether the eMMC card supports HPI */
|
|
if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
|
|
card->ext_csd.hpi = 1;
|
|
if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
|
|
card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
|
|
else
|
|
card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
|
|
/*
|
|
* Indicate the maximum timeout to close
|
|
* a command interrupted by HPI
|
|
*/
|
|
card->ext_csd.out_of_int_time =
|
|
ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
|
|
}
|
|
|
|
card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
|
|
card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
|
|
|
|
/*
|
|
* RPMB regions are defined in multiples of 128K.
|
|
*/
|
|
card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
|
|
if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
|
|
mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
|
|
EXT_CSD_PART_CONFIG_ACC_RPMB,
|
|
"rpmb", 0, false,
|
|
MMC_BLK_DATA_AREA_RPMB);
|
|
}
|
|
}
|
|
|
|
card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
|
|
if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
|
|
card->erased_byte = 0xFF;
|
|
else
|
|
card->erased_byte = 0x0;
|
|
|
|
/* eMMC v4.5 or later */
|
|
if (card->ext_csd.rev >= 6) {
|
|
card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
|
|
|
|
card->ext_csd.generic_cmd6_time = 10 *
|
|
ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
|
|
card->ext_csd.power_off_longtime = 10 *
|
|
ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
|
|
|
|
card->ext_csd.cache_size =
|
|
ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
|
|
ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
|
|
ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
|
|
ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
|
|
|
|
if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
|
|
card->ext_csd.data_sector_size = 4096;
|
|
else
|
|
card->ext_csd.data_sector_size = 512;
|
|
|
|
if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
|
|
(ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
|
|
card->ext_csd.data_tag_unit_size =
|
|
((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
|
|
(card->ext_csd.data_sector_size);
|
|
} else {
|
|
card->ext_csd.data_tag_unit_size = 0;
|
|
}
|
|
|
|
card->ext_csd.max_packed_writes =
|
|
ext_csd[EXT_CSD_MAX_PACKED_WRITES];
|
|
card->ext_csd.max_packed_reads =
|
|
ext_csd[EXT_CSD_MAX_PACKED_READS];
|
|
} else {
|
|
card->ext_csd.data_sector_size = 512;
|
|
}
|
|
|
|
/* eMMC v5 or later */
|
|
if (card->ext_csd.rev >= 7) {
|
|
memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
|
|
MMC_FIRMWARE_LEN);
|
|
card->ext_csd.ffu_capable =
|
|
(ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
|
|
!(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int mmc_read_ext_csd(struct mmc_card *card)
|
|
{
|
|
u8 *ext_csd;
|
|
int err;
|
|
|
|
if (!mmc_can_ext_csd(card))
|
|
return 0;
|
|
|
|
err = mmc_get_ext_csd(card, &ext_csd);
|
|
if (err) {
|
|
/* If the host or the card can't do the switch,
|
|
* fail more gracefully. */
|
|
if ((err != -EINVAL)
|
|
&& (err != -ENOSYS)
|
|
&& (err != -EFAULT))
|
|
return err;
|
|
|
|
/*
|
|
* High capacity cards should have this "magic" size
|
|
* stored in their CSD.
|
|
*/
|
|
if (card->csd.capacity == (4096 * 512)) {
|
|
pr_err("%s: unable to read EXT_CSD on a possible high capacity card. Card will be ignored.\n",
|
|
mmc_hostname(card->host));
|
|
} else {
|
|
pr_warn("%s: unable to read EXT_CSD, performance might suffer\n",
|
|
mmc_hostname(card->host));
|
|
err = 0;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
err = mmc_decode_ext_csd(card, ext_csd);
|
|
kfree(ext_csd);
|
|
return err;
|
|
}
|
|
|
|
static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
|
|
{
|
|
u8 *bw_ext_csd;
|
|
int err;
|
|
|
|
if (bus_width == MMC_BUS_WIDTH_1)
|
|
return 0;
|
|
|
|
err = mmc_get_ext_csd(card, &bw_ext_csd);
|
|
if (err)
|
|
return err;
|
|
|
|
/* only compare read only fields */
|
|
err = !((card->ext_csd.raw_partition_support ==
|
|
bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
|
|
(card->ext_csd.raw_erased_mem_count ==
|
|
bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
|
|
(card->ext_csd.rev ==
|
|
bw_ext_csd[EXT_CSD_REV]) &&
|
|
(card->ext_csd.raw_ext_csd_structure ==
|
|
bw_ext_csd[EXT_CSD_STRUCTURE]) &&
|
|
(card->ext_csd.raw_card_type ==
|
|
bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
|
|
(card->ext_csd.raw_s_a_timeout ==
|
|
bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
|
|
(card->ext_csd.raw_hc_erase_gap_size ==
|
|
bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
|
|
(card->ext_csd.raw_erase_timeout_mult ==
|
|
bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
|
|
(card->ext_csd.raw_hc_erase_grp_size ==
|
|
bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
|
|
(card->ext_csd.raw_sec_trim_mult ==
|
|
bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
|
|
(card->ext_csd.raw_sec_erase_mult ==
|
|
bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
|
|
(card->ext_csd.raw_sec_feature_support ==
|
|
bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
|
|
(card->ext_csd.raw_trim_mult ==
|
|
bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
|
|
(card->ext_csd.raw_sectors[0] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
|
|
(card->ext_csd.raw_sectors[1] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
|
|
(card->ext_csd.raw_sectors[2] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
|
|
(card->ext_csd.raw_sectors[3] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 3]) &&
|
|
(card->ext_csd.raw_pwr_cl_52_195 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
|
|
(card->ext_csd.raw_pwr_cl_26_195 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
|
|
(card->ext_csd.raw_pwr_cl_52_360 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
|
|
(card->ext_csd.raw_pwr_cl_26_360 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
|
|
(card->ext_csd.raw_pwr_cl_200_195 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
|
|
(card->ext_csd.raw_pwr_cl_200_360 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
|
|
(card->ext_csd.raw_pwr_cl_ddr_52_195 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
|
|
(card->ext_csd.raw_pwr_cl_ddr_52_360 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
|
|
(card->ext_csd.raw_pwr_cl_ddr_200_360 ==
|
|
bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
|
|
|
|
if (err)
|
|
err = -EINVAL;
|
|
|
|
kfree(bw_ext_csd);
|
|
return err;
|
|
}
|
|
|
|
MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
|
|
card->raw_cid[2], card->raw_cid[3]);
|
|
MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
|
|
card->raw_csd[2], card->raw_csd[3]);
|
|
MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
|
|
MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
|
|
MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
|
|
MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
|
|
MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
|
|
MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
|
|
MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
|
|
MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
|
|
MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv);
|
|
MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
|
|
MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
|
|
card->ext_csd.enhanced_area_offset);
|
|
MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
|
|
MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
|
|
MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
|
|
|
|
static ssize_t mmc_fwrev_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct mmc_card *card = mmc_dev_to_card(dev);
|
|
|
|
if (card->ext_csd.rev < 7) {
|
|
return sprintf(buf, "0x%x\n", card->cid.fwrev);
|
|
} else {
|
|
return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
|
|
card->ext_csd.fwrev);
|
|
}
|
|
}
|
|
|
|
static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
|
|
|
|
static struct attribute *mmc_std_attrs[] = {
|
|
&dev_attr_cid.attr,
|
|
&dev_attr_csd.attr,
|
|
&dev_attr_date.attr,
|
|
&dev_attr_erase_size.attr,
|
|
&dev_attr_preferred_erase_size.attr,
|
|
&dev_attr_fwrev.attr,
|
|
&dev_attr_ffu_capable.attr,
|
|
&dev_attr_hwrev.attr,
|
|
&dev_attr_manfid.attr,
|
|
&dev_attr_name.attr,
|
|
&dev_attr_oemid.attr,
|
|
&dev_attr_prv.attr,
|
|
&dev_attr_serial.attr,
|
|
&dev_attr_enhanced_area_offset.attr,
|
|
&dev_attr_enhanced_area_size.attr,
|
|
&dev_attr_raw_rpmb_size_mult.attr,
|
|
&dev_attr_rel_sectors.attr,
|
|
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), ext_csd_bits[idx]);
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Switch to the high-speed mode
|
|
*/
|
|
static int mmc_select_hs(struct mmc_card *card)
|
|
{
|
|
int err;
|
|
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
|
|
card->ext_csd.generic_cmd6_time,
|
|
true, true, true);
|
|
if (!err)
|
|
mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Activate wide bus and DDR if supported.
|
|
*/
|
|
static int mmc_select_hs_ddr(struct mmc_card *card)
|
|
{
|
|
struct mmc_host *host = card->host;
|
|
u32 bus_width, ext_csd_bits;
|
|
int err = 0;
|
|
|
|
if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
|
|
return 0;
|
|
|
|
bus_width = host->ios.bus_width;
|
|
if (bus_width == MMC_BUS_WIDTH_1)
|
|
return 0;
|
|
|
|
ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
|
|
EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
|
|
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_BUS_WIDTH,
|
|
ext_csd_bits,
|
|
card->ext_csd.generic_cmd6_time);
|
|
if (err) {
|
|
pr_err("%s: switch to bus width %d ddr failed\n",
|
|
mmc_hostname(host), 1 << bus_width);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* eMMC cards can support 3.3V to 1.2V i/o (vccq)
|
|
* signaling.
|
|
*
|
|
* EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
|
|
*
|
|
* 1.8V vccq at 3.3V core voltage (vcc) is not required
|
|
* in the JEDEC spec for DDR.
|
|
*
|
|
* Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
|
|
* host controller can support this, like some of the SDHCI
|
|
* controller which connect to an eMMC device. Some of these
|
|
* host controller still needs to use 1.8v vccq for supporting
|
|
* DDR mode.
|
|
*
|
|
* So the sequence will be:
|
|
* if (host and device can both support 1.2v IO)
|
|
* use 1.2v IO;
|
|
* else if (host and device can both support 1.8v IO)
|
|
* use 1.8v IO;
|
|
* so if host and device can only support 3.3v IO, this is the
|
|
* last choice.
|
|
*
|
|
* WARNING: eMMC rules are NOT the same as SD DDR
|
|
*/
|
|
err = -EINVAL;
|
|
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
|
|
err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
|
|
|
|
if (err && (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V))
|
|
err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
|
|
|
|
/* make sure vccq is 3.3v after switching disaster */
|
|
if (err)
|
|
err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
|
|
|
|
if (!err)
|
|
mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int mmc_select_hs400(struct mmc_card *card)
|
|
{
|
|
struct mmc_host *host = card->host;
|
|
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;
|
|
|
|
/*
|
|
* Before switching to dual data rate operation for HS400,
|
|
* it is required to convert from HS200 mode to HS mode.
|
|
*/
|
|
mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
|
|
mmc_set_bus_speed(card);
|
|
|
|
val = EXT_CSD_TIMING_HS |
|
|
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_HS_TIMING, val,
|
|
card->ext_csd.generic_cmd6_time,
|
|
true, true, true);
|
|
if (err) {
|
|
pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
|
|
mmc_hostname(host), err);
|
|
return err;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
val = EXT_CSD_TIMING_HS400 |
|
|
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_HS_TIMING, val,
|
|
card->ext_csd.generic_cmd6_time,
|
|
true, true, true);
|
|
if (err) {
|
|
pr_err("%s: switch to hs400 failed, err:%d\n",
|
|
mmc_hostname(host), err);
|
|
return err;
|
|
}
|
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_HS400);
|
|
mmc_set_bus_speed(card);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mmc_hs200_to_hs400(struct mmc_card *card)
|
|
{
|
|
return mmc_select_hs400(card);
|
|
}
|
|
|
|
/* Caller must hold re-tuning */
|
|
static int mmc_switch_status(struct mmc_card *card)
|
|
{
|
|
u32 status;
|
|
int err;
|
|
|
|
err = mmc_send_status(card, &status);
|
|
if (err)
|
|
return err;
|
|
|
|
return mmc_switch_status_error(card->host, status);
|
|
}
|
|
|
|
int mmc_hs400_to_hs200(struct mmc_card *card)
|
|
{
|
|
struct mmc_host *host = card->host;
|
|
bool send_status = true;
|
|
unsigned int max_dtr;
|
|
int err;
|
|
u8 val;
|
|
|
|
if (host->caps & MMC_CAP_WAIT_WHILE_BUSY)
|
|
send_status = false;
|
|
|
|
/* Reduce frequency to HS */
|
|
max_dtr = card->ext_csd.hs_max_dtr;
|
|
mmc_set_clock(host, max_dtr);
|
|
|
|
/* Switch HS400 to HS DDR */
|
|
val = EXT_CSD_TIMING_HS |
|
|
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
|
|
val, card->ext_csd.generic_cmd6_time,
|
|
true, send_status, true);
|
|
if (err)
|
|
goto out_err;
|
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
|
|
|
|
if (!send_status) {
|
|
err = mmc_switch_status(card);
|
|
if (err)
|
|
goto out_err;
|
|
}
|
|
|
|
/* Switch HS DDR to HS */
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
|
|
EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
|
|
true, send_status, true);
|
|
if (err)
|
|
goto out_err;
|
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_HS);
|
|
|
|
if (!send_status) {
|
|
err = mmc_switch_status(card);
|
|
if (err)
|
|
goto out_err;
|
|
}
|
|
|
|
/* Switch HS to HS200 */
|
|
val = EXT_CSD_TIMING_HS200 |
|
|
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
|
|
val, card->ext_csd.generic_cmd6_time, true,
|
|
send_status, true);
|
|
if (err)
|
|
goto out_err;
|
|
|
|
mmc_set_timing(host, MMC_TIMING_MMC_HS200);
|
|
|
|
if (!send_status) {
|
|
err = mmc_switch_status(card);
|
|
if (err)
|
|
goto out_err;
|
|
}
|
|
|
|
mmc_set_bus_speed(card);
|
|
|
|
return 0;
|
|
|
|
out_err:
|
|
pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
|
|
__func__, err);
|
|
return err;
|
|
}
|
|
|
|
static void mmc_select_driver_type(struct mmc_card *card)
|
|
{
|
|
int card_drv_type, drive_strength, drv_type;
|
|
|
|
card_drv_type = card->ext_csd.raw_driver_strength |
|
|
mmc_driver_type_mask(0);
|
|
|
|
drive_strength = mmc_select_drive_strength(card,
|
|
card->ext_csd.hs200_max_dtr,
|
|
card_drv_type, &drv_type);
|
|
|
|
card->drive_strength = drive_strength;
|
|
|
|
if (drv_type)
|
|
mmc_set_driver_type(card->host, drv_type);
|
|
}
|
|
|
|
/*
|
|
* For device supporting HS200 mode, the following sequence
|
|
* should be done before executing the tuning process.
|
|
* 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
|
|
* 2. switch to HS200 mode
|
|
* 3. set the clock to > 52Mhz and <=200MHz
|
|
*/
|
|
static int mmc_select_hs200(struct mmc_card *card)
|
|
{
|
|
struct mmc_host *host = card->host;
|
|
int err = -EINVAL;
|
|
u8 val;
|
|
|
|
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
|
|
err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
|
|
|
|
if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
|
|
err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
|
|
|
|
/* If fails try again during next card power cycle */
|
|
if (err)
|
|
goto err;
|
|
|
|
mmc_select_driver_type(card);
|
|
|
|
/*
|
|
* Set the bus width(4 or 8) with host's support and
|
|
* switch to HS200 mode if bus width is set successfully.
|
|
*/
|
|
err = mmc_select_bus_width(card);
|
|
if (!IS_ERR_VALUE(err)) {
|
|
val = EXT_CSD_TIMING_HS200 |
|
|
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_HS_TIMING, val,
|
|
card->ext_csd.generic_cmd6_time,
|
|
true, true, true);
|
|
if (!err)
|
|
mmc_set_timing(host, MMC_TIMING_MMC_HS200);
|
|
}
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Activate High Speed or HS200 mode if supported.
|
|
*/
|
|
static int mmc_select_timing(struct mmc_card *card)
|
|
{
|
|
int err = 0;
|
|
|
|
if (!mmc_can_ext_csd(card))
|
|
goto bus_speed;
|
|
|
|
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
|
|
err = mmc_select_hs200(card);
|
|
else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
|
|
err = mmc_select_hs(card);
|
|
|
|
if (err && err != -EBADMSG)
|
|
return err;
|
|
|
|
if (err) {
|
|
pr_warn("%s: switch to %s failed\n",
|
|
mmc_card_hs(card) ? "high-speed" :
|
|
(mmc_card_hs200(card) ? "hs200" : ""),
|
|
mmc_hostname(card->host));
|
|
err = 0;
|
|
}
|
|
|
|
bus_speed:
|
|
/*
|
|
* Set the bus speed to the selected bus timing.
|
|
* If timing is not selected, backward compatible is the default.
|
|
*/
|
|
mmc_set_bus_speed(card);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Execute tuning sequence to seek the proper bus operating
|
|
* conditions for HS200 and HS400, which sends CMD21 to the device.
|
|
*/
|
|
static int mmc_hs200_tuning(struct mmc_card *card)
|
|
{
|
|
struct mmc_host *host = card->host;
|
|
|
|
/*
|
|
* Timing should be adjusted to the HS400 target
|
|
* operation frequency for tuning process
|
|
*/
|
|
if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
|
|
host->ios.bus_width == MMC_BUS_WIDTH_8)
|
|
if (host->ops->prepare_hs400_tuning)
|
|
host->ops->prepare_hs400_tuning(host, &host->ios);
|
|
|
|
return mmc_execute_tuning(card);
|
|
}
|
|
|
|
/*
|
|
* Handle the detection and initialisation of a card.
|
|
*
|
|
* In the case of a resume, "oldcard" will contain the card
|
|
* we're trying to reinitialise.
|
|
*/
|
|
static int mmc_init_card(struct mmc_host *host, u32 ocr,
|
|
struct mmc_card *oldcard)
|
|
{
|
|
struct mmc_card *card;
|
|
int err;
|
|
u32 cid[4];
|
|
u32 rocr;
|
|
|
|
BUG_ON(!host);
|
|
WARN_ON(!host->claimed);
|
|
|
|
/* Set correct bus mode for MMC before attempting init */
|
|
if (!mmc_host_is_spi(host))
|
|
mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
|
|
|
|
/*
|
|
* Since we're changing the OCR value, we seem to
|
|
* need to tell some cards to go back to the idle
|
|
* state. We wait 1ms to give cards time to
|
|
* respond.
|
|
* mmc_go_idle is needed for eMMC that are asleep
|
|
*/
|
|
mmc_go_idle(host);
|
|
|
|
/* The extra bit indicates that we support high capacity */
|
|
err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
|
|
if (err)
|
|
goto err;
|
|
|
|
/*
|
|
* For SPI, enable CRC as appropriate.
|
|
*/
|
|
if (mmc_host_is_spi(host)) {
|
|
err = mmc_spi_set_crc(host, use_spi_crc);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Fetch CID from card.
|
|
*/
|
|
if (mmc_host_is_spi(host))
|
|
err = mmc_send_cid(host, cid);
|
|
else
|
|
err = mmc_all_send_cid(host, cid);
|
|
if (err)
|
|
goto err;
|
|
|
|
if (oldcard) {
|
|
if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
|
|
err = -ENOENT;
|
|
goto err;
|
|
}
|
|
|
|
card = oldcard;
|
|
} else {
|
|
/*
|
|
* Allocate card structure.
|
|
*/
|
|
card = mmc_alloc_card(host, &mmc_type);
|
|
if (IS_ERR(card)) {
|
|
err = PTR_ERR(card);
|
|
goto err;
|
|
}
|
|
|
|
card->ocr = ocr;
|
|
card->type = MMC_TYPE_MMC;
|
|
card->rca = 1;
|
|
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
|
|
}
|
|
|
|
/*
|
|
* Call the optional HC's init_card function to handle quirks.
|
|
*/
|
|
if (host->ops->init_card)
|
|
host->ops->init_card(host, card);
|
|
|
|
/*
|
|
* For native busses: set card RCA and quit open drain mode.
|
|
*/
|
|
if (!mmc_host_is_spi(host)) {
|
|
err = mmc_set_relative_addr(card);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
|
|
}
|
|
|
|
if (!oldcard) {
|
|
/*
|
|
* Fetch CSD from card.
|
|
*/
|
|
err = mmc_send_csd(card, card->raw_csd);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
err = mmc_decode_csd(card);
|
|
if (err)
|
|
goto free_card;
|
|
err = mmc_decode_cid(card);
|
|
if (err)
|
|
goto free_card;
|
|
}
|
|
|
|
/*
|
|
* handling only for cards supporting DSR and hosts requesting
|
|
* DSR configuration
|
|
*/
|
|
if (card->csd.dsr_imp && host->dsr_req)
|
|
mmc_set_dsr(host);
|
|
|
|
/*
|
|
* Select card, as all following commands rely on that.
|
|
*/
|
|
if (!mmc_host_is_spi(host)) {
|
|
err = mmc_select_card(card);
|
|
if (err)
|
|
goto free_card;
|
|
}
|
|
|
|
if (!oldcard) {
|
|
/* Read extended CSD. */
|
|
err = mmc_read_ext_csd(card);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
/* If doing byte addressing, check if required to do sector
|
|
* addressing. Handle the case of <2GB cards needing sector
|
|
* addressing. See section 8.1 JEDEC Standard JED84-A441;
|
|
* ocr register has bit 30 set for sector addressing.
|
|
*/
|
|
if (!(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.partition_setting_completed ||
|
|
(card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_ERASE_GROUP_DEF, 1,
|
|
card->ext_csd.generic_cmd6_time);
|
|
|
|
if (err && err != -EBADMSG)
|
|
goto free_card;
|
|
|
|
if (err) {
|
|
err = 0;
|
|
/*
|
|
* Just disable enhanced area off & sz
|
|
* will try to enable ERASE_GROUP_DEF
|
|
* during next time reinit
|
|
*/
|
|
card->ext_csd.enhanced_area_offset = -EINVAL;
|
|
card->ext_csd.enhanced_area_size = -EINVAL;
|
|
} else {
|
|
card->ext_csd.erase_group_def = 1;
|
|
/*
|
|
* enable ERASE_GRP_DEF successfully.
|
|
* This will affect the erase size, so
|
|
* here need to reset erase size
|
|
*/
|
|
mmc_set_erase_size(card);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Ensure eMMC user default partition is enabled
|
|
*/
|
|
if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
|
|
card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
|
|
card->ext_csd.part_config,
|
|
card->ext_csd.part_time);
|
|
if (err && err != -EBADMSG)
|
|
goto free_card;
|
|
}
|
|
|
|
/*
|
|
* Enable power_off_notification byte in the ext_csd register
|
|
*/
|
|
if (card->ext_csd.rev >= 6) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_POWER_OFF_NOTIFICATION,
|
|
EXT_CSD_POWER_ON,
|
|
card->ext_csd.generic_cmd6_time);
|
|
if (err && err != -EBADMSG)
|
|
goto free_card;
|
|
|
|
/*
|
|
* The err can be -EBADMSG or 0,
|
|
* so check for success and update the flag
|
|
*/
|
|
if (!err)
|
|
card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
|
|
}
|
|
|
|
/*
|
|
* Select timing interface
|
|
*/
|
|
err = mmc_select_timing(card);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
if (mmc_card_hs200(card)) {
|
|
err = mmc_hs200_tuning(card);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
err = mmc_select_hs400(card);
|
|
if (err)
|
|
goto free_card;
|
|
} else if (mmc_card_hs(card)) {
|
|
/* Select the desired bus width optionally */
|
|
err = mmc_select_bus_width(card);
|
|
if (!IS_ERR_VALUE(err)) {
|
|
err = mmc_select_hs_ddr(card);
|
|
if (err)
|
|
goto free_card;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Choose the power class with selected bus interface
|
|
*/
|
|
mmc_select_powerclass(card);
|
|
|
|
/*
|
|
* Enable HPI feature (if supported)
|
|
*/
|
|
if (card->ext_csd.hpi) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_HPI_MGMT, 1,
|
|
card->ext_csd.generic_cmd6_time);
|
|
if (err && err != -EBADMSG)
|
|
goto free_card;
|
|
if (err) {
|
|
pr_warn("%s: Enabling HPI failed\n",
|
|
mmc_hostname(card->host));
|
|
err = 0;
|
|
} else
|
|
card->ext_csd.hpi_en = 1;
|
|
}
|
|
|
|
/*
|
|
* If cache size is higher than 0, this indicates
|
|
* the existence of cache and it can be turned on.
|
|
*/
|
|
if (card->ext_csd.cache_size > 0) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_CACHE_CTRL, 1,
|
|
card->ext_csd.generic_cmd6_time);
|
|
if (err && err != -EBADMSG)
|
|
goto free_card;
|
|
|
|
/*
|
|
* Only if no error, cache is turned on successfully.
|
|
*/
|
|
if (err) {
|
|
pr_warn("%s: Cache is supported, but failed to turn on (%d)\n",
|
|
mmc_hostname(card->host), err);
|
|
card->ext_csd.cache_ctrl = 0;
|
|
err = 0;
|
|
} else {
|
|
card->ext_csd.cache_ctrl = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The mandatory minimum values are defined for packed command.
|
|
* read: 5, write: 3
|
|
*/
|
|
if (card->ext_csd.max_packed_writes >= 3 &&
|
|
card->ext_csd.max_packed_reads >= 5 &&
|
|
host->caps2 & MMC_CAP2_PACKED_CMD) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_EXP_EVENTS_CTRL,
|
|
EXT_CSD_PACKED_EVENT_EN,
|
|
card->ext_csd.generic_cmd6_time);
|
|
if (err && err != -EBADMSG)
|
|
goto free_card;
|
|
if (err) {
|
|
pr_warn("%s: Enabling packed event failed\n",
|
|
mmc_hostname(card->host));
|
|
card->ext_csd.packed_event_en = 0;
|
|
err = 0;
|
|
} else {
|
|
card->ext_csd.packed_event_en = 1;
|
|
}
|
|
}
|
|
|
|
if (!oldcard)
|
|
host->card = card;
|
|
|
|
return 0;
|
|
|
|
free_card:
|
|
if (!oldcard)
|
|
mmc_remove_card(card);
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
static int mmc_can_sleep(struct mmc_card *card)
|
|
{
|
|
return (card && card->ext_csd.rev >= 3);
|
|
}
|
|
|
|
static int mmc_sleep(struct mmc_host *host)
|
|
{
|
|
struct mmc_command cmd = {0};
|
|
struct mmc_card *card = host->card;
|
|
unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
|
|
int err;
|
|
|
|
/* Re-tuning can't be done once the card is deselected */
|
|
mmc_retune_hold(host);
|
|
|
|
err = mmc_deselect_cards(host);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
cmd.opcode = MMC_SLEEP_AWAKE;
|
|
cmd.arg = card->rca << 16;
|
|
cmd.arg |= 1 << 15;
|
|
|
|
/*
|
|
* If the max_busy_timeout of the host is specified, validate it against
|
|
* the sleep cmd timeout. A failure means we need to prevent the host
|
|
* from doing hw busy detection, which is done by converting to a R1
|
|
* response instead of a R1B.
|
|
*/
|
|
if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {
|
|
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
|
|
} else {
|
|
cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
|
|
cmd.busy_timeout = timeout_ms;
|
|
}
|
|
|
|
err = mmc_wait_for_cmd(host, &cmd, 0);
|
|
if (err)
|
|
goto out_release;
|
|
|
|
/*
|
|
* If the host does not wait while the card signals busy, then we will
|
|
* will have to wait the sleep/awake timeout. Note, we cannot use the
|
|
* SEND_STATUS command to poll the status because that command (and most
|
|
* others) is invalid while the card sleeps.
|
|
*/
|
|
if (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
|
|
mmc_delay(timeout_ms);
|
|
|
|
out_release:
|
|
mmc_retune_release(host);
|
|
return err;
|
|
}
|
|
|
|
static int mmc_can_poweroff_notify(const struct mmc_card *card)
|
|
{
|
|
return card &&
|
|
mmc_card_mmc(card) &&
|
|
(card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
|
|
}
|
|
|
|
static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
|
|
{
|
|
unsigned int timeout = card->ext_csd.generic_cmd6_time;
|
|
int err;
|
|
|
|
/* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
|
|
if (notify_type == EXT_CSD_POWER_OFF_LONG)
|
|
timeout = card->ext_csd.power_off_longtime;
|
|
|
|
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_POWER_OFF_NOTIFICATION,
|
|
notify_type, timeout, true, false, false);
|
|
if (err)
|
|
pr_err("%s: Power Off Notification timed out, %u\n",
|
|
mmc_hostname(card->host), timeout);
|
|
|
|
/* Disable the power off notification after the switch operation. */
|
|
card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Host is being removed. Free up the current card.
|
|
*/
|
|
static void mmc_remove(struct mmc_host *host)
|
|
{
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_remove_card(host->card);
|
|
host->card = NULL;
|
|
}
|
|
|
|
/*
|
|
* Card detection - card is alive.
|
|
*/
|
|
static int mmc_alive(struct mmc_host *host)
|
|
{
|
|
return mmc_send_status(host->card, NULL);
|
|
}
|
|
|
|
/*
|
|
* Card detection callback from host.
|
|
*/
|
|
static void mmc_detect(struct mmc_host *host)
|
|
{
|
|
int err;
|
|
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_get_card(host->card);
|
|
|
|
/*
|
|
* Just check if our card has been removed.
|
|
*/
|
|
err = _mmc_detect_card_removed(host);
|
|
|
|
mmc_put_card(host->card);
|
|
|
|
if (err) {
|
|
mmc_remove(host);
|
|
|
|
mmc_claim_host(host);
|
|
mmc_detach_bus(host);
|
|
mmc_power_off(host);
|
|
mmc_release_host(host);
|
|
}
|
|
}
|
|
|
|
static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
|
|
{
|
|
int err = 0;
|
|
unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
|
|
EXT_CSD_POWER_OFF_LONG;
|
|
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_claim_host(host);
|
|
|
|
if (mmc_card_suspended(host->card))
|
|
goto out;
|
|
|
|
if (mmc_card_doing_bkops(host->card)) {
|
|
err = mmc_stop_bkops(host->card);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
err = mmc_flush_cache(host->card);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (mmc_can_poweroff_notify(host->card) &&
|
|
((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
|
|
err = mmc_poweroff_notify(host->card, notify_type);
|
|
else if (mmc_can_sleep(host->card))
|
|
err = mmc_sleep(host);
|
|
else if (!mmc_host_is_spi(host))
|
|
err = mmc_deselect_cards(host);
|
|
|
|
if (!err) {
|
|
mmc_power_off(host);
|
|
mmc_card_set_suspended(host->card);
|
|
}
|
|
out:
|
|
mmc_release_host(host);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Suspend callback
|
|
*/
|
|
static int mmc_suspend(struct mmc_host *host)
|
|
{
|
|
int err;
|
|
|
|
err = _mmc_suspend(host, true);
|
|
if (!err) {
|
|
pm_runtime_disable(&host->card->dev);
|
|
pm_runtime_set_suspended(&host->card->dev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* This function tries to determine if the same card is still present
|
|
* and, if so, restore all state to it.
|
|
*/
|
|
static int _mmc_resume(struct mmc_host *host)
|
|
{
|
|
int err = 0;
|
|
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_claim_host(host);
|
|
|
|
if (!mmc_card_suspended(host->card))
|
|
goto out;
|
|
|
|
mmc_power_up(host, host->card->ocr);
|
|
err = mmc_init_card(host, host->card->ocr, host->card);
|
|
mmc_card_clr_suspended(host->card);
|
|
|
|
out:
|
|
mmc_release_host(host);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Shutdown callback
|
|
*/
|
|
static int mmc_shutdown(struct mmc_host *host)
|
|
{
|
|
int err = 0;
|
|
|
|
/*
|
|
* In a specific case for poweroff notify, we need to resume the card
|
|
* before we can shutdown it properly.
|
|
*/
|
|
if (mmc_can_poweroff_notify(host->card) &&
|
|
!(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
|
|
err = _mmc_resume(host);
|
|
|
|
if (!err)
|
|
err = _mmc_suspend(host, false);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Callback for resume.
|
|
*/
|
|
static int mmc_resume(struct mmc_host *host)
|
|
{
|
|
int err = 0;
|
|
|
|
if (!(host->caps & MMC_CAP_RUNTIME_RESUME)) {
|
|
err = _mmc_resume(host);
|
|
pm_runtime_set_active(&host->card->dev);
|
|
pm_runtime_mark_last_busy(&host->card->dev);
|
|
}
|
|
pm_runtime_enable(&host->card->dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if (!(host->caps & (MMC_CAP_AGGRESSIVE_PM | MMC_CAP_RUNTIME_RESUME)))
|
|
return 0;
|
|
|
|
err = _mmc_resume(host);
|
|
if (err)
|
|
pr_err("%s: error %d doing aggressive resume\n",
|
|
mmc_hostname(host), err);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mmc_can_reset(struct mmc_card *card)
|
|
{
|
|
u8 rst_n_function;
|
|
|
|
rst_n_function = card->ext_csd.rst_n_function;
|
|
if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL(mmc_can_reset);
|
|
|
|
static int mmc_reset(struct mmc_host *host)
|
|
{
|
|
struct mmc_card *card = host->card;
|
|
u32 status;
|
|
|
|
if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!mmc_can_reset(card))
|
|
return -EOPNOTSUPP;
|
|
|
|
mmc_host_clk_hold(host);
|
|
mmc_set_clock(host, host->f_init);
|
|
|
|
host->ops->hw_reset(host);
|
|
|
|
/* If the reset has happened, then a status command will fail */
|
|
if (!mmc_send_status(card, &status)) {
|
|
mmc_host_clk_release(host);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/* Set initial state and call mmc_set_ios */
|
|
mmc_set_initial_state(host);
|
|
mmc_host_clk_release(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,
|
|
.reset = mmc_reset,
|
|
};
|
|
|
|
/*
|
|
* Starting point for MMC card init.
|
|
*/
|
|
int mmc_attach_mmc(struct mmc_host *host)
|
|
{
|
|
int err;
|
|
u32 ocr, rocr;
|
|
|
|
BUG_ON(!host);
|
|
WARN_ON(!host->claimed);
|
|
|
|
/* Set correct bus mode for MMC before attempting attach */
|
|
if (!mmc_host_is_spi(host))
|
|
mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
|
|
|
|
err = mmc_send_op_cond(host, 0, &ocr);
|
|
if (err)
|
|
return err;
|
|
|
|
mmc_attach_bus(host, &mmc_ops);
|
|
if (host->ocr_avail_mmc)
|
|
host->ocr_avail = host->ocr_avail_mmc;
|
|
|
|
/*
|
|
* We need to get OCR a different way for SPI.
|
|
*/
|
|
if (mmc_host_is_spi(host)) {
|
|
err = mmc_spi_read_ocr(host, 1, &ocr);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
rocr = mmc_select_voltage(host, ocr);
|
|
|
|
/*
|
|
* Can we support the voltage of the card?
|
|
*/
|
|
if (!rocr) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Detect and init the card.
|
|
*/
|
|
err = mmc_init_card(host, rocr, NULL);
|
|
if (err)
|
|
goto err;
|
|
|
|
mmc_release_host(host);
|
|
err = mmc_add_card(host->card);
|
|
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;
|
|
}
|