2006-12-31 00:11:32 +01:00
|
|
|
/*
|
|
|
|
* linux/drivers/mmc/sd.c
|
|
|
|
*
|
|
|
|
* Copyright (C) 2003-2004 Russell King, All Rights Reserved.
|
|
|
|
* SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
|
|
|
|
* Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
|
|
* published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/err.h>
|
|
|
|
|
|
|
|
#include <linux/mmc/host.h>
|
|
|
|
#include <linux/mmc/card.h>
|
|
|
|
#include <linux/mmc/mmc.h>
|
2007-05-31 22:25:11 +02:00
|
|
|
#include <linux/mmc/sd.h>
|
2006-12-31 00:11:32 +01:00
|
|
|
|
|
|
|
#include "core.h"
|
|
|
|
#include "sysfs.h"
|
|
|
|
#include "mmc_ops.h"
|
|
|
|
#include "sd_ops.h"
|
|
|
|
|
|
|
|
#include "core.h"
|
|
|
|
|
|
|
|
static const unsigned int tran_exp[] = {
|
|
|
|
10000, 100000, 1000000, 10000000,
|
|
|
|
0, 0, 0, 0
|
|
|
|
};
|
|
|
|
|
|
|
|
static const unsigned char tran_mant[] = {
|
|
|
|
0, 10, 12, 13, 15, 20, 25, 30,
|
|
|
|
35, 40, 45, 50, 55, 60, 70, 80,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const unsigned int tacc_exp[] = {
|
|
|
|
1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const unsigned int tacc_mant[] = {
|
|
|
|
0, 10, 12, 13, 15, 20, 25, 30,
|
|
|
|
35, 40, 45, 50, 55, 60, 70, 80,
|
|
|
|
};
|
|
|
|
|
|
|
|
#define UNSTUFF_BITS(resp,start,size) \
|
|
|
|
({ \
|
|
|
|
const int __size = size; \
|
|
|
|
const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
|
|
|
|
const int __off = 3 - ((start) / 32); \
|
|
|
|
const int __shft = (start) & 31; \
|
|
|
|
u32 __res; \
|
|
|
|
\
|
|
|
|
__res = resp[__off] >> __shft; \
|
|
|
|
if (__size + __shft > 32) \
|
|
|
|
__res |= resp[__off-1] << ((32 - __shft) % 32); \
|
|
|
|
__res & __mask; \
|
|
|
|
})
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Given the decoded CSD structure, decode the raw CID to our CID structure.
|
|
|
|
*/
|
|
|
|
static void mmc_decode_cid(struct mmc_card *card)
|
|
|
|
{
|
|
|
|
u32 *resp = card->raw_cid;
|
|
|
|
|
|
|
|
memset(&card->cid, 0, sizeof(struct mmc_cid));
|
|
|
|
|
|
|
|
/*
|
|
|
|
* SD doesn't currently have a version field so we will
|
|
|
|
* have to assume we can parse this.
|
|
|
|
*/
|
|
|
|
card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
|
|
|
|
card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
|
|
|
|
card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
|
|
|
|
card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
|
|
|
|
card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
|
|
|
|
card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
|
|
|
|
card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
|
|
|
|
card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
|
|
|
|
card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
|
|
|
|
card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
|
|
|
|
card->cid.year = UNSTUFF_BITS(resp, 12, 8);
|
|
|
|
card->cid.month = UNSTUFF_BITS(resp, 8, 4);
|
|
|
|
|
|
|
|
card->cid.year += 2000; /* SD cards year offset */
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Given a 128-bit response, decode to our card CSD structure.
|
|
|
|
*/
|
2007-05-01 16:11:57 +02:00
|
|
|
static int mmc_decode_csd(struct mmc_card *card)
|
2006-12-31 00:11:32 +01:00
|
|
|
{
|
|
|
|
struct mmc_csd *csd = &card->csd;
|
|
|
|
unsigned int e, m, csd_struct;
|
|
|
|
u32 *resp = card->raw_csd;
|
|
|
|
|
|
|
|
csd_struct = UNSTUFF_BITS(resp, 126, 2);
|
|
|
|
|
|
|
|
switch (csd_struct) {
|
|
|
|
case 0:
|
|
|
|
m = UNSTUFF_BITS(resp, 115, 4);
|
|
|
|
e = UNSTUFF_BITS(resp, 112, 3);
|
|
|
|
csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
|
|
|
|
csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
|
|
|
|
|
|
|
|
m = UNSTUFF_BITS(resp, 99, 4);
|
|
|
|
e = UNSTUFF_BITS(resp, 96, 3);
|
|
|
|
csd->max_dtr = tran_exp[e] * tran_mant[m];
|
|
|
|
csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
|
|
|
|
|
|
|
|
e = UNSTUFF_BITS(resp, 47, 3);
|
|
|
|
m = UNSTUFF_BITS(resp, 62, 12);
|
|
|
|
csd->capacity = (1 + m) << (e + 2);
|
|
|
|
|
|
|
|
csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
|
|
|
|
csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
|
|
|
|
csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
|
|
|
|
csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
|
|
|
|
csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
|
|
|
|
csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
|
|
|
|
csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
/*
|
|
|
|
* This is a block-addressed SDHC card. Most
|
|
|
|
* interesting fields are unused and have fixed
|
|
|
|
* values. To avoid getting tripped by buggy cards,
|
|
|
|
* we assume those fixed values ourselves.
|
|
|
|
*/
|
|
|
|
mmc_card_set_blockaddr(card);
|
|
|
|
|
|
|
|
csd->tacc_ns = 0; /* Unused */
|
|
|
|
csd->tacc_clks = 0; /* Unused */
|
|
|
|
|
|
|
|
m = UNSTUFF_BITS(resp, 99, 4);
|
|
|
|
e = UNSTUFF_BITS(resp, 96, 3);
|
|
|
|
csd->max_dtr = tran_exp[e] * tran_mant[m];
|
|
|
|
csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
|
|
|
|
|
|
|
|
m = UNSTUFF_BITS(resp, 48, 22);
|
|
|
|
csd->capacity = (1 + m) << 10;
|
|
|
|
|
|
|
|
csd->read_blkbits = 9;
|
|
|
|
csd->read_partial = 0;
|
|
|
|
csd->write_misalign = 0;
|
|
|
|
csd->read_misalign = 0;
|
|
|
|
csd->r2w_factor = 4; /* Unused */
|
|
|
|
csd->write_blkbits = 9;
|
|
|
|
csd->write_partial = 0;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
printk("%s: unrecognised CSD structure version %d\n",
|
|
|
|
mmc_hostname(card->host), csd_struct);
|
2007-05-01 16:11:57 +02:00
|
|
|
return -EINVAL;
|
2006-12-31 00:11:32 +01:00
|
|
|
}
|
2007-05-01 16:11:57 +02:00
|
|
|
|
|
|
|
return 0;
|
2006-12-31 00:11:32 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Given a 64-bit response, decode to our card SCR structure.
|
|
|
|
*/
|
2007-05-01 16:11:57 +02:00
|
|
|
static int mmc_decode_scr(struct mmc_card *card)
|
2006-12-31 00:11:32 +01:00
|
|
|
{
|
|
|
|
struct sd_scr *scr = &card->scr;
|
|
|
|
unsigned int scr_struct;
|
|
|
|
u32 resp[4];
|
|
|
|
|
|
|
|
BUG_ON(!mmc_card_sd(card));
|
|
|
|
|
|
|
|
resp[3] = card->raw_scr[1];
|
|
|
|
resp[2] = card->raw_scr[0];
|
|
|
|
|
|
|
|
scr_struct = UNSTUFF_BITS(resp, 60, 4);
|
|
|
|
if (scr_struct != 0) {
|
|
|
|
printk("%s: unrecognised SCR structure version %d\n",
|
|
|
|
mmc_hostname(card->host), scr_struct);
|
2007-05-01 16:11:57 +02:00
|
|
|
return -EINVAL;
|
2006-12-31 00:11:32 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
|
|
|
|
scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
|
2007-05-01 16:11:57 +02:00
|
|
|
|
|
|
|
return 0;
|
2006-12-31 00:11:32 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2007-05-01 14:46:08 +02:00
|
|
|
* Fetches and decodes switch information
|
2006-12-31 00:11:32 +01:00
|
|
|
*/
|
2007-05-01 14:46:08 +02:00
|
|
|
static int mmc_read_switch(struct mmc_card *card)
|
2006-12-31 00:11:32 +01:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
u8 *status;
|
|
|
|
|
2007-05-31 22:25:11 +02:00
|
|
|
if (card->scr.sda_vsn < SCR_SPEC_VER_1)
|
|
|
|
return MMC_ERR_NONE;
|
|
|
|
|
|
|
|
if (!(card->csd.cmdclass & CCC_SWITCH)) {
|
|
|
|
printk(KERN_WARNING "%s: card lacks mandatory switch "
|
|
|
|
"function, performance might suffer.\n",
|
|
|
|
mmc_hostname(card->host));
|
|
|
|
return MMC_ERR_NONE;
|
|
|
|
}
|
|
|
|
|
2006-12-31 00:11:32 +01:00
|
|
|
err = MMC_ERR_FAILED;
|
|
|
|
|
|
|
|
status = kmalloc(64, GFP_KERNEL);
|
|
|
|
if (!status) {
|
|
|
|
printk("%s: could not allocate a buffer for switch "
|
|
|
|
"capabilities.\n",
|
|
|
|
mmc_hostname(card->host));
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = mmc_sd_switch(card, 0, 0, 1, status);
|
|
|
|
if (err != MMC_ERR_NONE) {
|
2007-05-31 22:25:11 +02:00
|
|
|
printk(KERN_WARNING "%s: problem reading switch "
|
|
|
|
"capabilities, performance might suffer.\n",
|
|
|
|
mmc_hostname(card->host));
|
2007-05-01 14:46:08 +02:00
|
|
|
err = MMC_ERR_NONE;
|
2006-12-31 00:11:32 +01:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (status[13] & 0x02)
|
|
|
|
card->sw_caps.hs_max_dtr = 50000000;
|
|
|
|
|
2007-05-01 14:46:08 +02:00
|
|
|
out:
|
|
|
|
kfree(status);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test if the card supports high-speed mode and, if so, switch to it.
|
|
|
|
*/
|
|
|
|
static int mmc_switch_hs(struct mmc_card *card)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
u8 *status;
|
|
|
|
|
2007-05-31 22:25:11 +02:00
|
|
|
if (card->scr.sda_vsn < SCR_SPEC_VER_1)
|
|
|
|
return MMC_ERR_NONE;
|
|
|
|
|
|
|
|
if (!(card->csd.cmdclass & CCC_SWITCH))
|
|
|
|
return MMC_ERR_NONE;
|
|
|
|
|
2007-05-01 14:46:08 +02:00
|
|
|
if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
|
|
|
|
return MMC_ERR_NONE;
|
|
|
|
|
|
|
|
if (card->sw_caps.hs_max_dtr == 0)
|
|
|
|
return MMC_ERR_NONE;
|
|
|
|
|
|
|
|
err = MMC_ERR_FAILED;
|
|
|
|
|
|
|
|
status = kmalloc(64, GFP_KERNEL);
|
|
|
|
if (!status) {
|
|
|
|
printk("%s: could not allocate a buffer for switch "
|
|
|
|
"capabilities.\n",
|
|
|
|
mmc_hostname(card->host));
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2006-12-31 00:11:32 +01:00
|
|
|
err = mmc_sd_switch(card, 1, 0, 1, status);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if ((status[16] & 0xF) != 1) {
|
|
|
|
printk(KERN_WARNING "%s: Problem switching card "
|
|
|
|
"into high-speed mode!\n",
|
|
|
|
mmc_hostname(card->host));
|
|
|
|
} else {
|
|
|
|
mmc_card_set_highspeed(card);
|
|
|
|
mmc_set_timing(card->host, MMC_TIMING_SD_HS);
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
kfree(status);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2007-05-01 16:00:02 +02:00
|
|
|
* Handle the detection and initialisation of a card.
|
|
|
|
*
|
|
|
|
* In the case of a resume, "curcard" will contain the card
|
|
|
|
* we're trying to reinitialise.
|
2006-12-31 00:11:32 +01:00
|
|
|
*/
|
2007-05-01 16:00:02 +02:00
|
|
|
static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
|
|
|
|
struct mmc_card *oldcard)
|
2006-12-31 00:11:32 +01:00
|
|
|
{
|
|
|
|
struct mmc_card *card;
|
|
|
|
int err;
|
|
|
|
u32 cid[4];
|
|
|
|
unsigned int max_dtr;
|
|
|
|
|
|
|
|
BUG_ON(!host);
|
|
|
|
BUG_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);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If SD_SEND_IF_COND indicates an SD 2.0
|
|
|
|
* compliant card and we should set bit 30
|
|
|
|
* of the ocr to indicate that we can handle
|
|
|
|
* block-addressed SDHC cards.
|
|
|
|
*/
|
2007-05-01 16:00:02 +02:00
|
|
|
err = mmc_send_if_cond(host, ocr);
|
2006-12-31 00:11:32 +01:00
|
|
|
if (err == MMC_ERR_NONE)
|
2007-05-01 16:00:02 +02:00
|
|
|
ocr |= 1 << 30;
|
2006-12-31 00:11:32 +01:00
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
err = mmc_send_app_op_cond(host, ocr, NULL);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto err;
|
2006-12-31 00:11:32 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Fetch CID from card.
|
|
|
|
*/
|
|
|
|
err = mmc_all_send_cid(host, cid);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto err;
|
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
if (oldcard) {
|
|
|
|
if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
|
|
|
|
goto err;
|
2006-12-31 00:11:32 +01:00
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
card = oldcard;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Allocate card structure.
|
|
|
|
*/
|
|
|
|
card = mmc_alloc_card(host);
|
|
|
|
if (IS_ERR(card))
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
card->type = MMC_TYPE_SD;
|
|
|
|
memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
|
|
|
|
}
|
2006-12-31 00:11:32 +01:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Set card RCA.
|
|
|
|
*/
|
|
|
|
err = mmc_send_relative_addr(host, &card->rca);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto free_card;
|
|
|
|
|
|
|
|
mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
|
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
if (!oldcard) {
|
|
|
|
/*
|
|
|
|
* Fetch CSD from card.
|
|
|
|
*/
|
|
|
|
err = mmc_send_csd(card, card->raw_csd);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto free_card;
|
2006-12-31 00:11:32 +01:00
|
|
|
|
2007-05-01 16:11:57 +02:00
|
|
|
err = mmc_decode_csd(card);
|
|
|
|
if (err < 0)
|
|
|
|
goto free_card;
|
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
mmc_decode_cid(card);
|
|
|
|
}
|
2006-12-31 00:11:32 +01:00
|
|
|
|
|
|
|
/*
|
2007-05-01 16:00:02 +02:00
|
|
|
* Select card, as all following commands rely on that.
|
2006-12-31 00:11:32 +01:00
|
|
|
*/
|
|
|
|
err = mmc_select_card(card);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto free_card;
|
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
if (!oldcard) {
|
|
|
|
/*
|
|
|
|
* Fetch SCR from card.
|
|
|
|
*/
|
|
|
|
err = mmc_app_send_scr(card, card->raw_scr);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto free_card;
|
2006-12-31 00:11:32 +01:00
|
|
|
|
2007-05-01 16:11:57 +02:00
|
|
|
err = mmc_decode_scr(card);
|
|
|
|
if (err < 0)
|
|
|
|
goto free_card;
|
2006-12-31 00:11:32 +01:00
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
/*
|
|
|
|
* Fetch switch information from card.
|
|
|
|
*/
|
|
|
|
err = mmc_read_switch(card);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto free_card;
|
|
|
|
}
|
2007-05-01 14:46:08 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Attempt to change to high-speed (if supported)
|
2006-12-31 00:11:32 +01:00
|
|
|
*/
|
|
|
|
err = mmc_switch_hs(card);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto free_card;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Compute bus speed.
|
|
|
|
*/
|
|
|
|
max_dtr = (unsigned int)-1;
|
|
|
|
|
|
|
|
if (mmc_card_highspeed(card)) {
|
|
|
|
if (max_dtr > card->sw_caps.hs_max_dtr)
|
|
|
|
max_dtr = card->sw_caps.hs_max_dtr;
|
|
|
|
} else if (max_dtr > card->csd.max_dtr) {
|
|
|
|
max_dtr = card->csd.max_dtr;
|
|
|
|
}
|
|
|
|
|
|
|
|
mmc_set_clock(host, max_dtr);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Switch to wider bus (if supported).
|
|
|
|
*/
|
2007-06-06 20:23:25 +02:00
|
|
|
if ((host->caps & MMC_CAP_4_BIT_DATA) &&
|
2006-12-31 00:11:32 +01:00
|
|
|
(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
|
|
|
|
err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto free_card;
|
|
|
|
|
|
|
|
mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
|
|
|
|
}
|
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
if (!oldcard)
|
|
|
|
host->card = card;
|
|
|
|
|
|
|
|
return MMC_ERR_NONE;
|
|
|
|
|
|
|
|
free_card:
|
|
|
|
if (!oldcard)
|
|
|
|
mmc_remove_card(card);
|
|
|
|
err:
|
|
|
|
|
|
|
|
return MMC_ERR_FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Host is being removed. Free up the current card.
|
|
|
|
*/
|
|
|
|
static void mmc_sd_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_sd_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);
|
2006-12-31 00:11:32 +01:00
|
|
|
|
|
|
|
mmc_release_host(host);
|
|
|
|
|
2007-05-01 16:00:02 +02:00
|
|
|
if (err != MMC_ERR_NONE) {
|
|
|
|
mmc_remove_card(host->card);
|
|
|
|
host->card = NULL;
|
|
|
|
|
|
|
|
mmc_claim_host(host);
|
|
|
|
mmc_detach_bus(host);
|
|
|
|
mmc_release_host(host);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_MMC_UNSAFE_RESUME
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Suspend callback from host.
|
|
|
|
*/
|
|
|
|
static void mmc_sd_suspend(struct mmc_host *host)
|
|
|
|
{
|
|
|
|
BUG_ON(!host);
|
|
|
|
BUG_ON(!host->card);
|
|
|
|
|
|
|
|
mmc_claim_host(host);
|
|
|
|
mmc_deselect_cards(host);
|
|
|
|
host->card->state &= ~MMC_STATE_HIGHSPEED;
|
|
|
|
mmc_release_host(host);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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 void mmc_sd_resume(struct mmc_host *host)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
BUG_ON(!host);
|
|
|
|
BUG_ON(!host->card);
|
|
|
|
|
|
|
|
mmc_claim_host(host);
|
|
|
|
|
|
|
|
err = mmc_sd_init_card(host, host->ocr, host->card);
|
|
|
|
if (err != MMC_ERR_NONE) {
|
|
|
|
mmc_remove_card(host->card);
|
|
|
|
host->card = NULL;
|
|
|
|
|
|
|
|
mmc_detach_bus(host);
|
|
|
|
}
|
|
|
|
|
|
|
|
mmc_release_host(host);
|
|
|
|
}
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
|
|
|
#define mmc_sd_suspend NULL
|
|
|
|
#define mmc_sd_resume NULL
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static const struct mmc_bus_ops mmc_sd_ops = {
|
|
|
|
.remove = mmc_sd_remove,
|
|
|
|
.detect = mmc_sd_detect,
|
|
|
|
.suspend = mmc_sd_suspend,
|
|
|
|
.resume = mmc_sd_resume,
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Starting point for SD card init.
|
|
|
|
*/
|
|
|
|
int mmc_attach_sd(struct mmc_host *host, u32 ocr)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
BUG_ON(!host);
|
|
|
|
BUG_ON(!host->claimed);
|
|
|
|
|
|
|
|
mmc_attach_bus(host, &mmc_sd_ops);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ocr & MMC_VDD_165_195) {
|
|
|
|
printk(KERN_WARNING "%s: SD card claims to support the "
|
|
|
|
"incompletely defined 'low voltage range'. This "
|
|
|
|
"will be ignored.\n", mmc_hostname(host));
|
|
|
|
ocr &= ~MMC_VDD_165_195;
|
|
|
|
}
|
|
|
|
|
|
|
|
host->ocr = mmc_select_voltage(host, ocr);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Can we support the voltage(s) of the card(s)?
|
|
|
|
*/
|
|
|
|
if (!host->ocr)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Detect and init the card.
|
|
|
|
*/
|
|
|
|
err = mmc_sd_init_card(host, host->ocr, NULL);
|
|
|
|
if (err != MMC_ERR_NONE)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
mmc_release_host(host);
|
|
|
|
|
|
|
|
err = mmc_register_card(host->card);
|
2006-12-31 00:11:32 +01:00
|
|
|
if (err)
|
|
|
|
goto reclaim_host;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
reclaim_host:
|
|
|
|
mmc_claim_host(host);
|
2007-05-01 16:00:02 +02:00
|
|
|
mmc_remove_card(host->card);
|
2006-12-31 00:11:32 +01:00
|
|
|
host->card = NULL;
|
|
|
|
err:
|
|
|
|
mmc_detach_bus(host);
|
|
|
|
mmc_release_host(host);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|