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38ca285044
The eMMC v4.5 Spec is released now: EXT_CSD_REV Extended CSD Revision 255-7 Reserved 6 Revision 1.6 (for MMC v4.5) 5 Revision 1.5 (for MMV v4.41) ... Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
1085 lines
27 KiB
C
1085 lines
27 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/slab.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 "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.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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printk(KERN_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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printk(KERN_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->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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/*
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* Read extended CSD.
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*/
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static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
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{
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int err;
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u8 *ext_csd;
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BUG_ON(!card);
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BUG_ON(!new_ext_csd);
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*new_ext_csd = NULL;
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if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
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return 0;
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/*
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* As the ext_csd is so large and mostly unused, we don't store the
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* raw block in mmc_card.
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*/
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ext_csd = kmalloc(512, GFP_KERNEL);
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if (!ext_csd) {
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printk(KERN_ERR "%s: could not allocate a buffer to "
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"receive the ext_csd.\n", mmc_hostname(card->host));
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return -ENOMEM;
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}
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err = mmc_send_ext_csd(card, ext_csd);
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if (err) {
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kfree(ext_csd);
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*new_ext_csd = NULL;
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/* If the host or the card can't do the switch,
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* fail more gracefully. */
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if ((err != -EINVAL)
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&& (err != -ENOSYS)
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&& (err != -EFAULT))
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return err;
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/*
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* High capacity cards should have this "magic" size
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* stored in their CSD.
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*/
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if (card->csd.capacity == (4096 * 512)) {
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printk(KERN_ERR "%s: unable to read EXT_CSD "
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"on a possible high capacity card. "
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"Card will be ignored.\n",
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mmc_hostname(card->host));
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} else {
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printk(KERN_WARNING "%s: unable to read "
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"EXT_CSD, performance might "
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"suffer.\n",
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mmc_hostname(card->host));
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err = 0;
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}
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} else
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*new_ext_csd = ext_csd;
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return err;
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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_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
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{
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int err = 0;
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BUG_ON(!card);
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if (!ext_csd)
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return 0;
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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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printk(KERN_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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card->ext_csd.rev = ext_csd[EXT_CSD_REV];
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if (card->ext_csd.rev > 6) {
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printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
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mmc_hostname(card->host), card->ext_csd.rev);
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err = -EINVAL;
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goto out;
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}
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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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card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
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switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
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case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
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EXT_CSD_CARD_TYPE_26:
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card->ext_csd.hs_max_dtr = 52000000;
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card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
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break;
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case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
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EXT_CSD_CARD_TYPE_26:
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card->ext_csd.hs_max_dtr = 52000000;
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card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
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break;
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case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
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EXT_CSD_CARD_TYPE_26:
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card->ext_csd.hs_max_dtr = 52000000;
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card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
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break;
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case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
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card->ext_csd.hs_max_dtr = 52000000;
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break;
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case EXT_CSD_CARD_TYPE_26:
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card->ext_csd.hs_max_dtr = 26000000;
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break;
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default:
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/* MMC v4 spec says this cannot happen */
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printk(KERN_WARNING "%s: card is mmc v4 but doesn't "
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"support any high-speed modes.\n",
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mmc_hostname(card->host));
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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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/* 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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/* 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 =
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ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
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card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
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/*
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* There are two boot regions of equal size, defined in
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* multiples of 128K.
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*/
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card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
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}
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card->ext_csd.raw_hc_erase_gap_size =
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ext_csd[EXT_CSD_PARTITION_ATTRIBUTE];
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card->ext_csd.raw_sec_trim_mult =
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ext_csd[EXT_CSD_SEC_TRIM_MULT];
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card->ext_csd.raw_sec_erase_mult =
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ext_csd[EXT_CSD_SEC_ERASE_MULT];
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card->ext_csd.raw_sec_feature_support =
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ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
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card->ext_csd.raw_trim_mult =
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ext_csd[EXT_CSD_TRIM_MULT];
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if (card->ext_csd.rev >= 4) {
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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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u8 hc_erase_grp_sz =
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ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
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u8 hc_wp_grp_sz =
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ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
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card->ext_csd.enhanced_area_en = 1;
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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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(ext_csd[139] << 24) + (ext_csd[138] << 16) +
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(ext_csd[137] << 8) + 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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/*
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* If the enhanced area is not enabled, disable these
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* device attributes.
|
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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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card->ext_csd.sec_trim_mult =
|
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ext_csd[EXT_CSD_SEC_TRIM_MULT];
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card->ext_csd.sec_erase_mult =
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ext_csd[EXT_CSD_SEC_ERASE_MULT];
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card->ext_csd.sec_feature_support =
|
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ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
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card->ext_csd.trim_timeout = 300 *
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ext_csd[EXT_CSD_TRIM_MULT];
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}
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|
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if (card->ext_csd.rev >= 5)
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card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
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|
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if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
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card->erased_byte = 0xFF;
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else
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card->erased_byte = 0x0;
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|
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out:
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return err;
|
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}
|
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|
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static inline void mmc_free_ext_csd(u8 *ext_csd)
|
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{
|
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kfree(ext_csd);
|
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}
|
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|
|
|
|
static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
|
|
{
|
|
u8 *bw_ext_csd;
|
|
int err;
|
|
|
|
if (bus_width == MMC_BUS_WIDTH_1)
|
|
return 0;
|
|
|
|
err = mmc_get_ext_csd(card, &bw_ext_csd);
|
|
|
|
if (err || bw_ext_csd == NULL) {
|
|
if (bus_width != MMC_BUS_WIDTH_1)
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (bus_width == MMC_BUS_WIDTH_1)
|
|
goto out;
|
|
|
|
/* only compare read only fields */
|
|
err = (!(card->ext_csd.raw_partition_support ==
|
|
bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
|
|
(card->ext_csd.raw_erased_mem_count ==
|
|
bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
|
|
(card->ext_csd.rev ==
|
|
bw_ext_csd[EXT_CSD_REV]) &&
|
|
(card->ext_csd.raw_ext_csd_structure ==
|
|
bw_ext_csd[EXT_CSD_STRUCTURE]) &&
|
|
(card->ext_csd.raw_card_type ==
|
|
bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
|
|
(card->ext_csd.raw_s_a_timeout ==
|
|
bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
|
|
(card->ext_csd.raw_hc_erase_gap_size ==
|
|
bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
|
|
(card->ext_csd.raw_erase_timeout_mult ==
|
|
bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
|
|
(card->ext_csd.raw_hc_erase_grp_size ==
|
|
bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
|
|
(card->ext_csd.raw_sec_trim_mult ==
|
|
bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
|
|
(card->ext_csd.raw_sec_erase_mult ==
|
|
bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
|
|
(card->ext_csd.raw_sec_feature_support ==
|
|
bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
|
|
(card->ext_csd.raw_trim_mult ==
|
|
bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
|
|
(card->ext_csd.raw_sectors[0] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
|
|
(card->ext_csd.raw_sectors[1] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
|
|
(card->ext_csd.raw_sectors[2] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
|
|
(card->ext_csd.raw_sectors[3] ==
|
|
bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
|
|
if (err)
|
|
err = -EINVAL;
|
|
|
|
out:
|
|
mmc_free_ext_csd(bw_ext_csd);
|
|
return err;
|
|
}
|
|
|
|
MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
|
|
card->raw_cid[2], card->raw_cid[3]);
|
|
MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
|
|
card->raw_csd[2], card->raw_csd[3]);
|
|
MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
|
|
MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
|
|
MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
|
|
MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
|
|
MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
|
|
MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
|
|
MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
|
|
MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
|
|
MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
|
|
MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
|
|
card->ext_csd.enhanced_area_offset);
|
|
MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
|
|
|
|
static struct attribute *mmc_std_attrs[] = {
|
|
&dev_attr_cid.attr,
|
|
&dev_attr_csd.attr,
|
|
&dev_attr_date.attr,
|
|
&dev_attr_erase_size.attr,
|
|
&dev_attr_preferred_erase_size.attr,
|
|
&dev_attr_fwrev.attr,
|
|
&dev_attr_hwrev.attr,
|
|
&dev_attr_manfid.attr,
|
|
&dev_attr_name.attr,
|
|
&dev_attr_oemid.attr,
|
|
&dev_attr_serial.attr,
|
|
&dev_attr_enhanced_area_offset.attr,
|
|
&dev_attr_enhanced_area_size.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group mmc_std_attr_group = {
|
|
.attrs = mmc_std_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *mmc_attr_groups[] = {
|
|
&mmc_std_attr_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct device_type mmc_type = {
|
|
.groups = mmc_attr_groups,
|
|
};
|
|
|
|
/*
|
|
* Handle the detection and initialisation of a card.
|
|
*
|
|
* In the case of a resume, "oldcard" will contain the card
|
|
* we're trying to reinitialise.
|
|
*/
|
|
static int mmc_init_card(struct mmc_host *host, u32 ocr,
|
|
struct mmc_card *oldcard)
|
|
{
|
|
struct mmc_card *card;
|
|
int err, ddr = 0;
|
|
u32 cid[4];
|
|
unsigned int max_dtr;
|
|
u32 rocr;
|
|
u8 *ext_csd = NULL;
|
|
|
|
BUG_ON(!host);
|
|
WARN_ON(!host->claimed);
|
|
|
|
/*
|
|
* 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(host);
|
|
|
|
/* The extra bit indicates that we support high capacity */
|
|
err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
|
|
if (err)
|
|
goto err;
|
|
|
|
/*
|
|
* For SPI, enable CRC as appropriate.
|
|
*/
|
|
if (mmc_host_is_spi(host)) {
|
|
err = mmc_spi_set_crc(host, use_spi_crc);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Fetch CID from card.
|
|
*/
|
|
if (mmc_host_is_spi(host))
|
|
err = mmc_send_cid(host, cid);
|
|
else
|
|
err = mmc_all_send_cid(host, cid);
|
|
if (err)
|
|
goto err;
|
|
|
|
if (oldcard) {
|
|
if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
|
|
err = -ENOENT;
|
|
goto err;
|
|
}
|
|
|
|
card = oldcard;
|
|
} else {
|
|
/*
|
|
* Allocate card structure.
|
|
*/
|
|
card = mmc_alloc_card(host, &mmc_type);
|
|
if (IS_ERR(card)) {
|
|
err = PTR_ERR(card);
|
|
goto err;
|
|
}
|
|
|
|
card->type = MMC_TYPE_MMC;
|
|
card->rca = 1;
|
|
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
|
|
}
|
|
|
|
/*
|
|
* For native busses: set card RCA and quit open drain mode.
|
|
*/
|
|
if (!mmc_host_is_spi(host)) {
|
|
err = mmc_set_relative_addr(card);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
|
|
}
|
|
|
|
if (!oldcard) {
|
|
/*
|
|
* Fetch CSD from card.
|
|
*/
|
|
err = mmc_send_csd(card, card->raw_csd);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
err = mmc_decode_csd(card);
|
|
if (err)
|
|
goto free_card;
|
|
err = mmc_decode_cid(card);
|
|
if (err)
|
|
goto free_card;
|
|
}
|
|
|
|
/*
|
|
* Select card, as all following commands rely on that.
|
|
*/
|
|
if (!mmc_host_is_spi(host)) {
|
|
err = mmc_select_card(card);
|
|
if (err)
|
|
goto free_card;
|
|
}
|
|
|
|
if (!oldcard) {
|
|
/*
|
|
* Fetch and process extended CSD.
|
|
*/
|
|
|
|
err = mmc_get_ext_csd(card, &ext_csd);
|
|
if (err)
|
|
goto free_card;
|
|
err = mmc_read_ext_csd(card, ext_csd);
|
|
if (err)
|
|
goto free_card;
|
|
|
|
/* If doing byte addressing, check if required to do sector
|
|
* addressing. Handle the case of <2GB cards needing sector
|
|
* addressing. See section 8.1 JEDEC Standard JED84-A441;
|
|
* ocr register has bit 30 set for sector addressing.
|
|
*/
|
|
if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
|
|
mmc_card_set_blockaddr(card);
|
|
|
|
/* Erase size depends on CSD and Extended CSD */
|
|
mmc_set_erase_size(card);
|
|
}
|
|
|
|
/*
|
|
* If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
|
|
* bit. This bit will be lost every time after a reset or power off.
|
|
*/
|
|
if (card->ext_csd.enhanced_area_en) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_ERASE_GROUP_DEF, 1, 0);
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Activate high speed (if supported)
|
|
*/
|
|
if ((card->ext_csd.hs_max_dtr != 0) &&
|
|
(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_HS_TIMING, 1, 0);
|
|
if (err && err != -EBADMSG)
|
|
goto free_card;
|
|
|
|
if (err) {
|
|
printk(KERN_WARNING "%s: switch to highspeed failed\n",
|
|
mmc_hostname(card->host));
|
|
err = 0;
|
|
} else {
|
|
mmc_card_set_highspeed(card);
|
|
mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compute bus speed.
|
|
*/
|
|
max_dtr = (unsigned int)-1;
|
|
|
|
if (mmc_card_highspeed(card)) {
|
|
if (max_dtr > card->ext_csd.hs_max_dtr)
|
|
max_dtr = card->ext_csd.hs_max_dtr;
|
|
} else if (max_dtr > card->csd.max_dtr) {
|
|
max_dtr = card->csd.max_dtr;
|
|
}
|
|
|
|
mmc_set_clock(host, max_dtr);
|
|
|
|
/*
|
|
* Indicate DDR mode (if supported).
|
|
*/
|
|
if (mmc_card_highspeed(card)) {
|
|
if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
|
|
&& ((host->caps & (MMC_CAP_1_8V_DDR |
|
|
MMC_CAP_UHS_DDR50))
|
|
== (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
|
|
ddr = MMC_1_8V_DDR_MODE;
|
|
else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
|
|
&& ((host->caps & (MMC_CAP_1_2V_DDR |
|
|
MMC_CAP_UHS_DDR50))
|
|
== (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
|
|
ddr = MMC_1_2V_DDR_MODE;
|
|
}
|
|
|
|
/*
|
|
* Activate wide bus and DDR (if supported).
|
|
*/
|
|
if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
|
|
(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
|
|
static unsigned ext_csd_bits[][2] = {
|
|
{ EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
|
|
{ EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
|
|
{ EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
|
|
};
|
|
static unsigned bus_widths[] = {
|
|
MMC_BUS_WIDTH_8,
|
|
MMC_BUS_WIDTH_4,
|
|
MMC_BUS_WIDTH_1
|
|
};
|
|
unsigned idx, bus_width = 0;
|
|
|
|
if (host->caps & MMC_CAP_8_BIT_DATA)
|
|
idx = 0;
|
|
else
|
|
idx = 1;
|
|
for (; idx < ARRAY_SIZE(bus_widths); idx++) {
|
|
bus_width = bus_widths[idx];
|
|
if (bus_width == MMC_BUS_WIDTH_1)
|
|
ddr = 0; /* no DDR for 1-bit width */
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_BUS_WIDTH,
|
|
ext_csd_bits[idx][0],
|
|
0);
|
|
if (!err) {
|
|
mmc_set_bus_width(card->host, bus_width);
|
|
|
|
/*
|
|
* If controller can't handle bus width test,
|
|
* compare ext_csd previously read in 1 bit mode
|
|
* against ext_csd at new bus width
|
|
*/
|
|
if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
|
|
err = mmc_compare_ext_csds(card,
|
|
bus_width);
|
|
else
|
|
err = mmc_bus_test(card, bus_width);
|
|
if (!err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!err && ddr) {
|
|
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_BUS_WIDTH,
|
|
ext_csd_bits[idx][1],
|
|
0);
|
|
}
|
|
if (err) {
|
|
printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
|
|
"failed\n", mmc_hostname(card->host),
|
|
1 << bus_width, ddr);
|
|
goto free_card;
|
|
} else if (ddr) {
|
|
/*
|
|
* eMMC cards can support 3.3V to 1.2V i/o (vccq)
|
|
* signaling.
|
|
*
|
|
* EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
|
|
*
|
|
* 1.8V vccq at 3.3V core voltage (vcc) is not required
|
|
* in the JEDEC spec for DDR.
|
|
*
|
|
* Do not force change in vccq since we are obviously
|
|
* working and no change to vccq is needed.
|
|
*
|
|
* WARNING: eMMC rules are NOT the same as SD DDR
|
|
*/
|
|
if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
|
|
err = mmc_set_signal_voltage(host,
|
|
MMC_SIGNAL_VOLTAGE_120, 0);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
mmc_card_set_ddr_mode(card);
|
|
mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
|
|
mmc_set_bus_width(card->host, bus_width);
|
|
}
|
|
}
|
|
|
|
if (!oldcard)
|
|
host->card = card;
|
|
|
|
mmc_free_ext_csd(ext_csd);
|
|
return 0;
|
|
|
|
free_card:
|
|
if (!oldcard)
|
|
mmc_remove_card(card);
|
|
err:
|
|
mmc_free_ext_csd(ext_csd);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Host is being removed. Free up the current card.
|
|
*/
|
|
static void mmc_remove(struct mmc_host *host)
|
|
{
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_remove_card(host->card);
|
|
host->card = NULL;
|
|
}
|
|
|
|
/*
|
|
* Card detection callback from host.
|
|
*/
|
|
static void mmc_detect(struct mmc_host *host)
|
|
{
|
|
int err;
|
|
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_claim_host(host);
|
|
|
|
/*
|
|
* Just check if our card has been removed.
|
|
*/
|
|
err = mmc_send_status(host->card, NULL);
|
|
|
|
mmc_release_host(host);
|
|
|
|
if (err) {
|
|
mmc_remove(host);
|
|
|
|
mmc_claim_host(host);
|
|
mmc_detach_bus(host);
|
|
mmc_release_host(host);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Suspend callback from host.
|
|
*/
|
|
static int mmc_suspend(struct mmc_host *host)
|
|
{
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_claim_host(host);
|
|
if (!mmc_host_is_spi(host))
|
|
mmc_deselect_cards(host);
|
|
host->card->state &= ~MMC_STATE_HIGHSPEED;
|
|
mmc_release_host(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Resume callback from host.
|
|
*
|
|
* This function tries to determine if the same card is still present
|
|
* and, if so, restore all state to it.
|
|
*/
|
|
static int mmc_resume(struct mmc_host *host)
|
|
{
|
|
int err;
|
|
|
|
BUG_ON(!host);
|
|
BUG_ON(!host->card);
|
|
|
|
mmc_claim_host(host);
|
|
err = mmc_init_card(host, host->ocr, host->card);
|
|
mmc_release_host(host);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int mmc_power_restore(struct mmc_host *host)
|
|
{
|
|
int ret;
|
|
|
|
host->card->state &= ~MMC_STATE_HIGHSPEED;
|
|
mmc_claim_host(host);
|
|
ret = mmc_init_card(host, host->ocr, host->card);
|
|
mmc_release_host(host);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mmc_sleep(struct mmc_host *host)
|
|
{
|
|
struct mmc_card *card = host->card;
|
|
int err = -ENOSYS;
|
|
|
|
if (card && card->ext_csd.rev >= 3) {
|
|
err = mmc_card_sleepawake(host, 1);
|
|
if (err < 0)
|
|
pr_debug("%s: Error %d while putting card into sleep",
|
|
mmc_hostname(host), err);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int mmc_awake(struct mmc_host *host)
|
|
{
|
|
struct mmc_card *card = host->card;
|
|
int err = -ENOSYS;
|
|
|
|
if (card && card->ext_csd.rev >= 3) {
|
|
err = mmc_card_sleepawake(host, 0);
|
|
if (err < 0)
|
|
pr_debug("%s: Error %d while awaking sleeping card",
|
|
mmc_hostname(host), err);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct mmc_bus_ops mmc_ops = {
|
|
.awake = mmc_awake,
|
|
.sleep = mmc_sleep,
|
|
.remove = mmc_remove,
|
|
.detect = mmc_detect,
|
|
.suspend = NULL,
|
|
.resume = NULL,
|
|
.power_restore = mmc_power_restore,
|
|
};
|
|
|
|
static const struct mmc_bus_ops mmc_ops_unsafe = {
|
|
.awake = mmc_awake,
|
|
.sleep = mmc_sleep,
|
|
.remove = mmc_remove,
|
|
.detect = mmc_detect,
|
|
.suspend = mmc_suspend,
|
|
.resume = mmc_resume,
|
|
.power_restore = mmc_power_restore,
|
|
};
|
|
|
|
static void mmc_attach_bus_ops(struct mmc_host *host)
|
|
{
|
|
const struct mmc_bus_ops *bus_ops;
|
|
|
|
if (!mmc_card_is_removable(host))
|
|
bus_ops = &mmc_ops_unsafe;
|
|
else
|
|
bus_ops = &mmc_ops;
|
|
mmc_attach_bus(host, bus_ops);
|
|
}
|
|
|
|
/*
|
|
* Starting point for MMC card init.
|
|
*/
|
|
int mmc_attach_mmc(struct mmc_host *host)
|
|
{
|
|
int err;
|
|
u32 ocr;
|
|
|
|
BUG_ON(!host);
|
|
WARN_ON(!host->claimed);
|
|
|
|
err = mmc_send_op_cond(host, 0, &ocr);
|
|
if (err)
|
|
return err;
|
|
|
|
mmc_attach_bus_ops(host);
|
|
if (host->ocr_avail_mmc)
|
|
host->ocr_avail = host->ocr_avail_mmc;
|
|
|
|
/*
|
|
* We need to get OCR a different way for SPI.
|
|
*/
|
|
if (mmc_host_is_spi(host)) {
|
|
err = mmc_spi_read_ocr(host, 1, &ocr);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Sanity check the voltages that the card claims to
|
|
* support.
|
|
*/
|
|
if (ocr & 0x7F) {
|
|
printk(KERN_WARNING "%s: card claims to support voltages "
|
|
"below the defined range. These will be ignored.\n",
|
|
mmc_hostname(host));
|
|
ocr &= ~0x7F;
|
|
}
|
|
|
|
host->ocr = mmc_select_voltage(host, ocr);
|
|
|
|
/*
|
|
* Can we support the voltage of the card?
|
|
*/
|
|
if (!host->ocr) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Detect and init the card.
|
|
*/
|
|
err = mmc_init_card(host, host->ocr, NULL);
|
|
if (err)
|
|
goto err;
|
|
|
|
mmc_release_host(host);
|
|
err = mmc_add_card(host->card);
|
|
mmc_claim_host(host);
|
|
if (err)
|
|
goto remove_card;
|
|
|
|
return 0;
|
|
|
|
remove_card:
|
|
mmc_release_host(host);
|
|
mmc_remove_card(host->card);
|
|
mmc_claim_host(host);
|
|
host->card = NULL;
|
|
err:
|
|
mmc_detach_bus(host);
|
|
|
|
printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
|
|
mmc_hostname(host), err);
|
|
|
|
return err;
|
|
}
|