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u-boot/cpu/pxa/mmc.c

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/*
* (C) Copyright 2003
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <common.h>
#include <mmc.h>
#include <asm/errno.h>
#include <asm/arch/hardware.h>
#include <part.h>
#ifdef CONFIG_MMC
extern int fat_register_device(block_dev_desc_t * dev_desc, int part_no);
static block_dev_desc_t mmc_dev;
block_dev_desc_t *mmc_get_dev(int dev)
{
return ((block_dev_desc_t *) & mmc_dev);
}
/*
* FIXME needs to read cid and csd info to determine block size
* and other parameters
*/
static uchar mmc_buf[MMC_BLOCK_SIZE];
static uchar spec_ver;
static int mmc_ready = 0;
static int wide = 0;
static uint32_t *
/****************************************************/
mmc_cmd(ushort cmd, ushort argh, ushort argl, ushort cmdat)
/****************************************************/
{
static uint32_t resp[4], a, b, c;
ulong status;
int i;
debug("mmc_cmd %u 0x%04x 0x%04x 0x%04x\n", cmd, argh, argl,
cmdat | wide);
MMC_STRPCL = MMC_STRPCL_STOP_CLK;
MMC_I_MASK = ~MMC_I_MASK_CLK_IS_OFF;
while (!(MMC_I_REG & MMC_I_REG_CLK_IS_OFF)) ;
MMC_CMD = cmd;
MMC_ARGH = argh;
MMC_ARGL = argl;
MMC_CMDAT = cmdat | wide;
MMC_I_MASK = ~MMC_I_MASK_END_CMD_RES;
MMC_STRPCL = MMC_STRPCL_START_CLK;
while (!(MMC_I_REG & MMC_I_REG_END_CMD_RES)) ;
status = MMC_STAT;
debug("MMC status 0x%08x\n", status);
if (status & MMC_STAT_TIME_OUT_RESPONSE) {
return 0;
}
/* Linux says:
* Did I mention this is Sick. We always need to
* discard the upper 8 bits of the first 16-bit word.
*/
a = (MMC_RES & 0xffff);
for (i = 0; i < 4; i++) {
b = (MMC_RES & 0xffff);
c = (MMC_RES & 0xffff);
resp[i] = (a << 24) | (b << 8) | (c >> 8);
a = c;
debug("MMC resp[%d] = %#08x\n", i, resp[i]);
}
return resp;
}
int
/****************************************************/
mmc_block_read(uchar * dst, ulong src, ulong len)
/****************************************************/
{
ushort argh, argl;
ulong status;
if (len == 0) {
return 0;
}
debug("mmc_block_rd dst %lx src %lx len %d\n", (ulong) dst, src, len);
argh = len >> 16;
argl = len & 0xffff;
/* set block len */
mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
/* send read command */
argh = src >> 16;
argl = src & 0xffff;
MMC_STRPCL = MMC_STRPCL_STOP_CLK;
MMC_RDTO = 0xffff;
MMC_NOB = 1;
MMC_BLKLEN = len;
mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK, argh, argl,
MMC_CMDAT_R1 | MMC_CMDAT_READ | MMC_CMDAT_BLOCK |
MMC_CMDAT_DATA_EN);
MMC_I_MASK = ~MMC_I_MASK_RXFIFO_RD_REQ;
while (len) {
if (MMC_I_REG & MMC_I_REG_RXFIFO_RD_REQ) {
#ifdef CONFIG_PXA27X
int i;
for (i = min(len, 32); i; i--) {
*dst++ = *((volatile uchar *)&MMC_RXFIFO);
len--;
}
#else
*dst++ = MMC_RXFIFO;
len--;
#endif
}
status = MMC_STAT;
if (status & MMC_STAT_ERRORS) {
printf("MMC_STAT error %lx\n", status);
return -1;
}
}
MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE)) ;
status = MMC_STAT;
if (status & MMC_STAT_ERRORS) {
printf("MMC_STAT error %lx\n", status);
return -1;
}
return 0;
}
int
/****************************************************/
mmc_block_write(ulong dst, uchar * src, int len)
/****************************************************/
{
ushort argh, argl;
ulong status;
if (len == 0) {
return 0;
}
debug("mmc_block_wr dst %lx src %lx len %d\n", dst, (ulong) src, len);
argh = len >> 16;
argl = len & 0xffff;
/* set block len */
mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
/* send write command */
argh = dst >> 16;
argl = dst & 0xffff;
MMC_STRPCL = MMC_STRPCL_STOP_CLK;
MMC_NOB = 1;
MMC_BLKLEN = len;
mmc_cmd(MMC_CMD_WRITE_BLOCK, argh, argl,
MMC_CMDAT_R1 | MMC_CMDAT_WRITE | MMC_CMDAT_BLOCK |
MMC_CMDAT_DATA_EN);
MMC_I_MASK = ~MMC_I_MASK_TXFIFO_WR_REQ;
while (len) {
if (MMC_I_REG & MMC_I_REG_TXFIFO_WR_REQ) {
int i, bytes = min(32, len);
for (i = 0; i < bytes; i++) {
MMC_TXFIFO = *src++;
}
if (bytes < 32) {
MMC_PRTBUF = MMC_PRTBUF_BUF_PART_FULL;
}
len -= bytes;
}
status = MMC_STAT;
if (status & MMC_STAT_ERRORS) {
printf("MMC_STAT error %lx\n", status);
return -1;
}
}
MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE)) ;
MMC_I_MASK = ~MMC_I_MASK_PRG_DONE;
while (!(MMC_I_REG & MMC_I_REG_PRG_DONE)) ;
status = MMC_STAT;
if (status & MMC_STAT_ERRORS) {
printf("MMC_STAT error %lx\n", status);
return -1;
}
return 0;
}
int
/****************************************************/
mmc_read(ulong src, uchar * dst, int size)
/****************************************************/
{
ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
ulong mmc_block_size, mmc_block_address;
if (size == 0) {
return 0;
}
if (!mmc_ready) {
printf("Please initial the MMC first\n");
return -1;
}
mmc_block_size = MMC_BLOCK_SIZE;
mmc_block_address = ~(mmc_block_size - 1);
src -= CONFIG_SYS_MMC_BASE;
end = src + size;
part_start = ~mmc_block_address & src;
part_end = ~mmc_block_address & end;
aligned_start = mmc_block_address & src;
aligned_end = mmc_block_address & end;
/* all block aligned accesses */
debug
("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if (part_start) {
part_len = mmc_block_size - part_start;
debug
("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) <
0) {
return -1;
}
memcpy(dst, mmc_buf + part_start, part_len);
dst += part_len;
src += part_len;
}
debug
("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
for (; src < aligned_end; src += mmc_block_size, dst += mmc_block_size) {
debug
("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if ((mmc_block_read((uchar *) (dst), src, mmc_block_size)) < 0) {
return -1;
}
}
debug
("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if (part_end && src < end) {
debug
("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0) {
return -1;
}
memcpy(dst, mmc_buf, part_end);
}
return 0;
}
int
/****************************************************/
mmc_write(uchar * src, ulong dst, int size)
/****************************************************/
{
ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
ulong mmc_block_size, mmc_block_address;
if (size == 0) {
return 0;
}
if (!mmc_ready) {
printf("Please initial the MMC first\n");
return -1;
}
mmc_block_size = MMC_BLOCK_SIZE;
mmc_block_address = ~(mmc_block_size - 1);
dst -= CONFIG_SYS_MMC_BASE;
end = dst + size;
part_start = ~mmc_block_address & dst;
part_end = ~mmc_block_address & end;
aligned_start = mmc_block_address & dst;
aligned_end = mmc_block_address & end;
/* all block aligned accesses */
debug
("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if (part_start) {
part_len = mmc_block_size - part_start;
debug
("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
(ulong) src, dst, end, part_start, part_end, aligned_start,
aligned_end);
if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) <
0) {
return -1;
}
memcpy(mmc_buf + part_start, src, part_len);
if ((mmc_block_write(aligned_start, mmc_buf, mmc_block_size)) <
0) {
return -1;
}
dst += part_len;
src += part_len;
}
debug
("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
for (; dst < aligned_end; src += mmc_block_size, dst += mmc_block_size) {
debug
("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if ((mmc_block_write(dst, (uchar *) src, mmc_block_size)) < 0) {
return -1;
}
}
debug
("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if (part_end && dst < end) {
debug
("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
src, (ulong) dst, end, part_start, part_end, aligned_start,
aligned_end);
if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0) {
return -1;
}
memcpy(mmc_buf, src, part_end);
if ((mmc_block_write(aligned_end, mmc_buf, mmc_block_size)) < 0) {
return -1;
}
}
return 0;
}
ulong
/****************************************************/
mmc_bread(int dev_num, ulong blknr, lbaint_t blkcnt, void *dst)
/****************************************************/
{
int mmc_block_size = MMC_BLOCK_SIZE;
ulong src = blknr * mmc_block_size + CONFIG_SYS_MMC_BASE;
mmc_read(src, (uchar *) dst, blkcnt * mmc_block_size);
return blkcnt;
}
#ifdef __GNUC__
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define likely(x) (x)
#define unlikely(x) (x)
#endif
#define UNSTUFF_BITS(resp,start,size) \
({ \
const int __size = size; \
const uint32_t __mask = (__size < 32 ? 1 << __size : 0) - 1; \
const int32_t __off = 3 - ((start) / 32); \
const int32_t __shft = (start) & 31; \
uint32_t __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(uint32_t * resp)
{
if (IF_TYPE_SD == mmc_dev.if_type) {
/*
* SD doesn't currently have a version field so we will
* have to assume we can parse this.
*/
sprintf((char *)mmc_dev.vendor,
"Man %02x OEM %c%c \"%c%c%c%c%c\" Date %02u/%04u",
UNSTUFF_BITS(resp, 120, 8), UNSTUFF_BITS(resp, 112, 8),
UNSTUFF_BITS(resp, 104, 8), UNSTUFF_BITS(resp, 96, 8),
UNSTUFF_BITS(resp, 88, 8), UNSTUFF_BITS(resp, 80, 8),
UNSTUFF_BITS(resp, 72, 8), UNSTUFF_BITS(resp, 64, 8),
UNSTUFF_BITS(resp, 8, 4), UNSTUFF_BITS(resp, 12,
8) + 2000);
sprintf((char *)mmc_dev.revision, "%d.%d",
UNSTUFF_BITS(resp, 60, 4), UNSTUFF_BITS(resp, 56, 4));
sprintf((char *)mmc_dev.product, "%u",
UNSTUFF_BITS(resp, 24, 32));
} else {
/*
* The selection of the format here is based upon published
* specs from sandisk and from what people have reported.
*/
switch (spec_ver) {
case 0: /* MMC v1.0 - v1.2 */
case 1: /* MMC v1.4 */
sprintf((char *)mmc_dev.vendor,
"Man %02x%02x%02x \"%c%c%c%c%c%c%c\" Date %02u/%04u",
UNSTUFF_BITS(resp, 120, 8), UNSTUFF_BITS(resp,
112,
8),
UNSTUFF_BITS(resp, 104, 8), UNSTUFF_BITS(resp,
96, 8),
UNSTUFF_BITS(resp, 88, 8), UNSTUFF_BITS(resp,
80, 8),
UNSTUFF_BITS(resp, 72, 8), UNSTUFF_BITS(resp,
64, 8),
UNSTUFF_BITS(resp, 56, 8), UNSTUFF_BITS(resp,
48, 8),
UNSTUFF_BITS(resp, 12, 4), UNSTUFF_BITS(resp, 8,
4) +
1997);
sprintf((char *)mmc_dev.revision, "%d.%d",
UNSTUFF_BITS(resp, 44, 4), UNSTUFF_BITS(resp,
40, 4));
sprintf((char *)mmc_dev.product, "%u",
UNSTUFF_BITS(resp, 16, 24));
break;
case 2: /* MMC v2.0 - v2.2 */
case 3: /* MMC v3.1 - v3.3 */
case 4: /* MMC v4 */
sprintf((char *)mmc_dev.vendor,
"Man %02x OEM %04x \"%c%c%c%c%c%c\" Date %02u/%04u",
UNSTUFF_BITS(resp, 120, 8), UNSTUFF_BITS(resp,
104,
16),
UNSTUFF_BITS(resp, 96, 8), UNSTUFF_BITS(resp,
88, 8),
UNSTUFF_BITS(resp, 80, 8), UNSTUFF_BITS(resp,
72, 8),
UNSTUFF_BITS(resp, 64, 8), UNSTUFF_BITS(resp,
56, 8),
UNSTUFF_BITS(resp, 12, 4), UNSTUFF_BITS(resp, 8,
4) +
1997);
sprintf((char *)mmc_dev.product, "%u",
UNSTUFF_BITS(resp, 16, 32));
sprintf((char *)mmc_dev.revision, "N/A");
break;
default:
printf("MMC card has unknown MMCA version %d\n",
spec_ver);
break;
}
}
printf("%s card.\nVendor: %s\nProduct: %s\nRevision: %s\n",
(IF_TYPE_SD == mmc_dev.if_type) ? "SD" : "MMC", mmc_dev.vendor,
mmc_dev.product, mmc_dev.revision);
}
/*
* Given a 128-bit response, decode to our card CSD structure.
*/
static void mmc_decode_csd(uint32_t * resp)
{
unsigned int mult, csd_struct;
if (IF_TYPE_SD == mmc_dev.if_type) {
csd_struct = UNSTUFF_BITS(resp, 126, 2);
if (csd_struct != 0) {
printf("SD: unrecognised CSD structure version %d\n",
csd_struct);
return;
}
} else {
/*
* We only understand CSD structure v1.1 and v1.2.
* v1.2 has extra information in bits 15, 11 and 10.
*/
csd_struct = UNSTUFF_BITS(resp, 126, 2);
if (csd_struct != 1 && csd_struct != 2) {
printf("MMC: unrecognised CSD structure version %d\n",
csd_struct);
return;
}
spec_ver = UNSTUFF_BITS(resp, 122, 4);
mmc_dev.if_type = IF_TYPE_MMC;
}
mult = 1 << (UNSTUFF_BITS(resp, 47, 3) + 2);
mmc_dev.lba = (1 + UNSTUFF_BITS(resp, 62, 12)) * mult;
mmc_dev.blksz = 1 << UNSTUFF_BITS(resp, 80, 4);
/* FIXME: The following just makes assumes that's the partition type -- should really read it */
mmc_dev.part_type = PART_TYPE_DOS;
mmc_dev.dev = 0;
mmc_dev.lun = 0;
mmc_dev.type = DEV_TYPE_HARDDISK;
mmc_dev.removable = 0;
mmc_dev.block_read = mmc_bread;
printf("Detected: %lu blocks of %lu bytes (%luMB) ",
mmc_dev.lba,
mmc_dev.blksz,
mmc_dev.lba * mmc_dev.blksz / (1024 * 1024));
}
int
/****************************************************/
mmc_init(int verbose)
/****************************************************/
{
int retries, rc = -ENODEV;
uint32_t cid_resp[4];
uint32_t *resp;
uint16_t rca = 0;
/* Reset device interface type */
mmc_dev.if_type = IF_TYPE_UNKNOWN;
#if defined (CONFIG_LUBBOCK) || (defined (CONFIG_GUMSTIX) && !defined(CONFIG_PXA27X))
set_GPIO_mode(GPIO6_MMCCLK_MD);
set_GPIO_mode(GPIO8_MMCCS0_MD);
#endif
CKEN |= CKEN12_MMC; /* enable MMC unit clock */
MMC_CLKRT = MMC_CLKRT_0_3125MHZ;
MMC_RESTO = MMC_RES_TO_MAX;
MMC_SPI = MMC_SPI_DISABLE;
/* reset */
mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, 0, MMC_CMDAT_INIT | MMC_CMDAT_R0);
udelay(200000);
retries = 3;
while (retries--) {
resp = mmc_cmd(MMC_CMD_APP_CMD, 0, 0, MMC_CMDAT_R1);
if (!(resp[0] & 0x00000020)) { /* Card does not support APP_CMD */
debug("Card does not support APP_CMD\n");
break;
}
/* Select 3.2-3.3V and 3.3-3.4V */
resp = mmc_cmd(SD_CMD_APP_SEND_OP_COND, 0x0030, 0x0000,
MMC_CMDAT_R3 | (retries < 2 ? 0
: MMC_CMDAT_INIT));
if (resp[0] & 0x80000000) {
mmc_dev.if_type = IF_TYPE_SD;
debug("Detected SD card\n");
break;
}
#ifdef CONFIG_PXA27X
udelay(10000);
#else
udelay(200000);
#endif
}
if (retries <= 0 || !(IF_TYPE_SD == mmc_dev.if_type)) {
debug("Failed to detect SD Card, trying MMC\n");
resp =
mmc_cmd(MMC_CMD_SEND_OP_COND, 0x00ff, 0x8000, MMC_CMDAT_R3);
retries = 10;
while (retries-- && resp && !(resp[0] & 0x80000000)) {
#ifdef CONFIG_PXA27X
udelay(10000);
#else
udelay(200000);
#endif
resp =
mmc_cmd(MMC_CMD_SEND_OP_COND, 0x00ff, 0x8000,
MMC_CMDAT_R3);
}
}
/* try to get card id */
resp =
mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, 0, MMC_CMDAT_R2 | MMC_CMDAT_BUSY);
if (resp) {
memcpy(cid_resp, resp, sizeof(cid_resp));
/* MMC exists, get CSD too */
resp = mmc_cmd(MMC_CMD_SET_RELATIVE_ADDR, 0, 0, MMC_CMDAT_R1);
if (IF_TYPE_SD == mmc_dev.if_type)
rca = ((resp[0] & 0xffff0000) >> 16);
resp = mmc_cmd(MMC_CMD_SEND_CSD, rca, 0, MMC_CMDAT_R2);
if (resp) {
mmc_decode_csd(resp);
rc = 0;
mmc_ready = 1;
}
mmc_decode_cid(cid_resp);
}
MMC_CLKRT = 0; /* 20 MHz */
resp = mmc_cmd(MMC_CMD_SELECT_CARD, rca, 0, MMC_CMDAT_R1);
#ifdef CONFIG_PXA27X
if (IF_TYPE_SD == mmc_dev.if_type) {
resp = mmc_cmd(MMC_CMD_APP_CMD, rca, 0, MMC_CMDAT_R1);
resp = mmc_cmd(SD_CMD_APP_SET_BUS_WIDTH, 0, 2, MMC_CMDAT_R1);
wide = MMC_CMDAT_SD_4DAT;
}
#endif
fat_register_device(&mmc_dev, 1); /* partitions start counting with 1 */
return rc;
}
int mmc_ident(block_dev_desc_t * dev)
{
return 0;
}
int mmc2info(ulong addr)
{
if (addr >= CONFIG_SYS_MMC_BASE
&& addr < CONFIG_SYS_MMC_BASE + (mmc_dev.lba * mmc_dev.blksz)) {
return 1;
}
return 0;
}
#endif /* CONFIG_MMC */
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