blob: 217f90c473df35d2cd32820cbe40760e320945af [file] [log] [blame]
/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/* Define a simple and generic interface to access eMMC and SD-card devices. */
#include <arch_helpers.h>
#include <assert.h>
#include <debug.h>
#include <delay_timer.h>
#include <errno.h>
#include <mmc.h>
#include <stdbool.h>
#include <string.h>
#include <utils.h>
#define MMC_DEFAULT_MAX_RETRIES 5
#define SEND_OP_COND_MAX_RETRIES 100
#define MULT_BY_512K_SHIFT 19
static const struct mmc_ops *ops;
static unsigned int mmc_ocr_value;
static struct mmc_csd_emmc mmc_csd;
static unsigned char mmc_ext_csd[512] __aligned(16);
static unsigned int mmc_flags;
static struct mmc_device_info *mmc_dev_info;
static unsigned int rca;
static const unsigned char tran_speed_base[16] = {
0, 10, 12, 13, 15, 20, 26, 30, 35, 40, 45, 52, 55, 60, 70, 80
};
static const unsigned char sd_tran_speed_base[16] = {
0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80
};
static bool is_cmd23_enabled(void)
{
return ((mmc_flags & MMC_FLAG_CMD23) != 0U);
}
static int mmc_send_cmd(unsigned int idx, unsigned int arg,
unsigned int r_type, unsigned int *r_data)
{
struct mmc_cmd cmd;
int ret;
zeromem(&cmd, sizeof(struct mmc_cmd));
cmd.cmd_idx = idx;
cmd.cmd_arg = arg;
cmd.resp_type = r_type;
ret = ops->send_cmd(&cmd);
if ((ret == 0) && (r_data != NULL)) {
int i;
for (i = 0; i < 4; i++) {
*r_data = cmd.resp_data[i];
r_data++;
}
}
if (ret != 0) {
VERBOSE("Send command %u error: %d\n", idx, ret);
}
return ret;
}
static int mmc_device_state(void)
{
int retries = MMC_DEFAULT_MAX_RETRIES;
unsigned int resp_data[4];
do {
int ret;
if (retries == 0) {
ERROR("CMD13 failed after %d retries\n",
MMC_DEFAULT_MAX_RETRIES);
return -EIO;
}
ret = mmc_send_cmd(MMC_CMD(13), rca << RCA_SHIFT_OFFSET,
MMC_RESPONSE_R(1), &resp_data[0]);
if (ret != 0) {
return ret;
}
if ((resp_data[0] & STATUS_SWITCH_ERROR) != 0U) {
return -EIO;
}
retries--;
} while ((resp_data[0] & STATUS_READY_FOR_DATA) == 0U);
return MMC_GET_STATE(resp_data[0]);
}
static int mmc_set_ext_csd(unsigned int ext_cmd, unsigned int value)
{
int ret;
ret = mmc_send_cmd(MMC_CMD(6),
EXTCSD_WRITE_BYTES | EXTCSD_CMD(ext_cmd) |
EXTCSD_VALUE(value) | EXTCSD_CMD_SET_NORMAL,
0, NULL);
if (ret != 0) {
return ret;
}
do {
ret = mmc_device_state();
if (ret < 0) {
return ret;
}
} while (ret == MMC_STATE_PRG);
return 0;
}
static int mmc_sd_switch(unsigned int bus_width)
{
int ret;
int retries = MMC_DEFAULT_MAX_RETRIES;
unsigned int scr[2] = { 0 };
unsigned int bus_width_arg = 0;
ret = ops->prepare(0, (uintptr_t)&scr, sizeof(scr));
if (ret != 0) {
return ret;
}
/* CMD55: Application Specific Command */
ret = mmc_send_cmd(MMC_CMD(55), rca << RCA_SHIFT_OFFSET,
MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return ret;
}
/* ACMD51: SEND_SCR */
do {
ret = mmc_send_cmd(MMC_ACMD(51), 0, MMC_RESPONSE_R(1), NULL);
if ((ret != 0) && (retries == 0)) {
ERROR("ACMD51 failed after %d retries (ret=%d)\n",
MMC_DEFAULT_MAX_RETRIES, ret);
return ret;
}
retries--;
} while (ret != 0);
ret = ops->read(0, (uintptr_t)&scr, sizeof(scr));
if (ret != 0) {
return ret;
}
if (((scr[0] & SD_SCR_BUS_WIDTH_4) != 0U) &&
(bus_width == MMC_BUS_WIDTH_4)) {
bus_width_arg = 2;
}
/* CMD55: Application Specific Command */
ret = mmc_send_cmd(MMC_CMD(55), rca << RCA_SHIFT_OFFSET,
MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return ret;
}
/* ACMD6: SET_BUS_WIDTH */
ret = mmc_send_cmd(MMC_ACMD(6), bus_width_arg, MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return ret;
}
do {
ret = mmc_device_state();
if (ret < 0) {
return ret;
}
} while (ret == MMC_STATE_PRG);
return 0;
}
static int mmc_set_ios(unsigned int clk, unsigned int bus_width)
{
int ret;
unsigned int width = bus_width;
if (mmc_dev_info->mmc_dev_type != MMC_IS_EMMC) {
if (width == MMC_BUS_WIDTH_8) {
WARN("Wrong bus config for SD-card, force to 4\n");
width = MMC_BUS_WIDTH_4;
}
ret = mmc_sd_switch(width);
if (ret != 0) {
return ret;
}
} else if (mmc_csd.spec_vers == 4U) {
ret = mmc_set_ext_csd(CMD_EXTCSD_BUS_WIDTH,
(unsigned int)width);
if (ret != 0) {
return ret;
}
} else {
VERBOSE("Wrong MMC type or spec version\n");
}
return ops->set_ios(clk, width);
}
static int mmc_fill_device_info(void)
{
unsigned long long c_size;
unsigned int speed_idx;
unsigned int nb_blocks;
unsigned int freq_unit;
int ret;
struct mmc_csd_sd_v2 *csd_sd_v2;
switch (mmc_dev_info->mmc_dev_type) {
case MMC_IS_EMMC:
mmc_dev_info->block_size = MMC_BLOCK_SIZE;
ret = ops->prepare(0, (uintptr_t)&mmc_ext_csd,
sizeof(mmc_ext_csd));
if (ret != 0) {
return ret;
}
/* MMC CMD8: SEND_EXT_CSD */
ret = mmc_send_cmd(MMC_CMD(8), 0, MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return ret;
}
ret = ops->read(0, (uintptr_t)&mmc_ext_csd,
sizeof(mmc_ext_csd));
if (ret != 0) {
return ret;
}
nb_blocks = (mmc_ext_csd[CMD_EXTCSD_SEC_CNT] << 0) |
(mmc_ext_csd[CMD_EXTCSD_SEC_CNT + 1] << 8) |
(mmc_ext_csd[CMD_EXTCSD_SEC_CNT + 2] << 16) |
(mmc_ext_csd[CMD_EXTCSD_SEC_CNT + 3] << 24);
mmc_dev_info->device_size = (unsigned long long)nb_blocks *
mmc_dev_info->block_size;
break;
case MMC_IS_SD:
/*
* Use the same mmc_csd struct, as required fields here
* (READ_BL_LEN, C_SIZE, CSIZE_MULT) are common with eMMC.
*/
mmc_dev_info->block_size = BIT_32(mmc_csd.read_bl_len);
c_size = ((unsigned long long)mmc_csd.c_size_high << 2U) |
(unsigned long long)mmc_csd.c_size_low;
assert(c_size != 0xFFFU);
mmc_dev_info->device_size = (c_size + 1U) *
BIT_64(mmc_csd.c_size_mult + 2U) *
mmc_dev_info->block_size;
break;
case MMC_IS_SD_HC:
assert(mmc_csd.csd_structure == 1U);
mmc_dev_info->block_size = MMC_BLOCK_SIZE;
/* Need to use mmc_csd_sd_v2 struct */
csd_sd_v2 = (struct mmc_csd_sd_v2 *)&mmc_csd;
c_size = ((unsigned long long)csd_sd_v2->c_size_high << 16) |
(unsigned long long)csd_sd_v2->c_size_low;
mmc_dev_info->device_size = (c_size + 1U) << MULT_BY_512K_SHIFT;
break;
default:
ret = -EINVAL;
break;
}
if (ret != 0) {
return ret;
}
speed_idx = (mmc_csd.tran_speed & CSD_TRAN_SPEED_MULT_MASK) >>
CSD_TRAN_SPEED_MULT_SHIFT;
assert(speed_idx > 0U);
if (mmc_dev_info->mmc_dev_type == MMC_IS_EMMC) {
mmc_dev_info->max_bus_freq = tran_speed_base[speed_idx];
} else {
mmc_dev_info->max_bus_freq = sd_tran_speed_base[speed_idx];
}
freq_unit = mmc_csd.tran_speed & CSD_TRAN_SPEED_UNIT_MASK;
while (freq_unit != 0U) {
mmc_dev_info->max_bus_freq *= 10U;
--freq_unit;
}
mmc_dev_info->max_bus_freq *= 10000U;
return 0;
}
static int sd_send_op_cond(void)
{
int n;
unsigned int resp_data[4];
for (n = 0; n < SEND_OP_COND_MAX_RETRIES; n++) {
int ret;
/* CMD55: Application Specific Command */
ret = mmc_send_cmd(MMC_CMD(55), 0, MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return ret;
}
/* ACMD41: SD_SEND_OP_COND */
ret = mmc_send_cmd(MMC_ACMD(41), OCR_HCS, MMC_RESPONSE_R(3),
&resp_data[0]);
if (ret != 0) {
return ret;
}
if ((resp_data[0] & OCR_POWERUP) != 0U) {
mmc_ocr_value = resp_data[0];
if ((mmc_ocr_value & OCR_HCS) != 0U) {
mmc_dev_info->mmc_dev_type = MMC_IS_SD_HC;
} else {
mmc_dev_info->mmc_dev_type = MMC_IS_SD;
}
return 0;
}
mdelay(1);
}
ERROR("ACMD41 failed after %d retries\n", SEND_OP_COND_MAX_RETRIES);
return -EIO;
}
static int mmc_reset_to_idle(void)
{
int ret;
/* CMD0: reset to IDLE */
ret = mmc_send_cmd(MMC_CMD(0), 0, 0, NULL);
if (ret != 0) {
return ret;
}
mdelay(2);
return 0;
}
static int mmc_send_op_cond(void)
{
int ret, n;
unsigned int resp_data[4];
mmc_reset_to_idle();
for (n = 0; n < SEND_OP_COND_MAX_RETRIES; n++) {
ret = mmc_send_cmd(MMC_CMD(1), OCR_SECTOR_MODE |
OCR_VDD_MIN_2V7 | OCR_VDD_MIN_1V7,
MMC_RESPONSE_R(3), &resp_data[0]);
if (ret != 0) {
return ret;
}
if ((resp_data[0] & OCR_POWERUP) != 0U) {
mmc_ocr_value = resp_data[0];
return 0;
}
mdelay(1);
}
ERROR("CMD1 failed after %d retries\n", SEND_OP_COND_MAX_RETRIES);
return -EIO;
}
static int mmc_enumerate(unsigned int clk, unsigned int bus_width)
{
int ret;
unsigned int resp_data[4];
ops->init();
mmc_reset_to_idle();
if (mmc_dev_info->mmc_dev_type == MMC_IS_EMMC) {
ret = mmc_send_op_cond();
} else {
/* CMD8: Send Interface Condition Command */
ret = mmc_send_cmd(MMC_CMD(8), VHS_2_7_3_6_V | CMD8_CHECK_PATTERN,
MMC_RESPONSE_R(7), &resp_data[0]);
if ((ret == 0) && ((resp_data[0] & 0xffU) == CMD8_CHECK_PATTERN)) {
ret = sd_send_op_cond();
}
}
if (ret != 0) {
return ret;
}
/* CMD2: Card Identification */
ret = mmc_send_cmd(MMC_CMD(2), 0, MMC_RESPONSE_R(2), NULL);
if (ret != 0) {
return ret;
}
/* CMD3: Set Relative Address */
if (mmc_dev_info->mmc_dev_type == MMC_IS_EMMC) {
rca = MMC_FIX_RCA;
ret = mmc_send_cmd(MMC_CMD(3), rca << RCA_SHIFT_OFFSET,
MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return ret;
}
} else {
ret = mmc_send_cmd(MMC_CMD(3), 0,
MMC_RESPONSE_R(6), &resp_data[0]);
if (ret != 0) {
return ret;
}
rca = (resp_data[0] & 0xFFFF0000U) >> 16;
}
/* CMD9: CSD Register */
ret = mmc_send_cmd(MMC_CMD(9), rca << RCA_SHIFT_OFFSET,
MMC_RESPONSE_R(2), &resp_data[0]);
if (ret != 0) {
return ret;
}
memcpy(&mmc_csd, &resp_data, sizeof(resp_data));
/* CMD7: Select Card */
ret = mmc_send_cmd(MMC_CMD(7), rca << RCA_SHIFT_OFFSET,
MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return ret;
}
do {
ret = mmc_device_state();
if (ret < 0) {
return ret;
}
} while (ret != MMC_STATE_TRAN);
ret = mmc_set_ios(clk, bus_width);
if (ret != 0) {
return ret;
}
return mmc_fill_device_info();
}
size_t mmc_read_blocks(int lba, uintptr_t buf, size_t size)
{
int ret;
unsigned int cmd_idx, cmd_arg;
assert((ops != NULL) &&
(ops->read != NULL) &&
(size != 0U) &&
((size & MMC_BLOCK_MASK) == 0U));
ret = ops->prepare(lba, buf, size);
if (ret != 0) {
return 0;
}
if (is_cmd23_enabled()) {
/* Set block count */
ret = mmc_send_cmd(MMC_CMD(23), size / MMC_BLOCK_SIZE,
MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return 0;
}
cmd_idx = MMC_CMD(18);
} else {
if (size > MMC_BLOCK_SIZE) {
cmd_idx = MMC_CMD(18);
} else {
cmd_idx = MMC_CMD(17);
}
}
if (((mmc_ocr_value & OCR_ACCESS_MODE_MASK) == OCR_BYTE_MODE) &&
(mmc_dev_info->mmc_dev_type != MMC_IS_SD_HC)) {
cmd_arg = lba * MMC_BLOCK_SIZE;
} else {
cmd_arg = lba;
}
ret = mmc_send_cmd(cmd_idx, cmd_arg, MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return 0;
}
ret = ops->read(lba, buf, size);
if (ret != 0) {
return 0;
}
/* Wait buffer empty */
do {
ret = mmc_device_state();
if (ret < 0) {
return 0;
}
} while ((ret != MMC_STATE_TRAN) && (ret != MMC_STATE_DATA));
if (!is_cmd23_enabled() && (size > MMC_BLOCK_SIZE)) {
ret = mmc_send_cmd(MMC_CMD(12), 0, 0, NULL);
if (ret != 0) {
return 0;
}
}
return size;
}
size_t mmc_write_blocks(int lba, const uintptr_t buf, size_t size)
{
int ret;
unsigned int cmd_idx, cmd_arg;
assert((ops != NULL) &&
(ops->write != NULL) &&
(size != 0U) &&
((buf & MMC_BLOCK_MASK) == 0U) &&
((size & MMC_BLOCK_MASK) == 0U));
ret = ops->prepare(lba, buf, size);
if (ret != 0) {
return 0;
}
if (is_cmd23_enabled()) {
/* Set block count */
ret = mmc_send_cmd(MMC_CMD(23), size / MMC_BLOCK_SIZE,
MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return 0;
}
cmd_idx = MMC_CMD(25);
} else {
if (size > MMC_BLOCK_SIZE) {
cmd_idx = MMC_CMD(25);
} else {
cmd_idx = MMC_CMD(24);
}
}
if ((mmc_ocr_value & OCR_ACCESS_MODE_MASK) == OCR_BYTE_MODE) {
cmd_arg = lba * MMC_BLOCK_SIZE;
} else {
cmd_arg = lba;
}
ret = mmc_send_cmd(cmd_idx, cmd_arg, MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return 0;
}
ret = ops->write(lba, buf, size);
if (ret != 0) {
return 0;
}
/* Wait buffer empty */
do {
ret = mmc_device_state();
if (ret < 0) {
return 0;
}
} while ((ret != MMC_STATE_TRAN) && (ret != MMC_STATE_RCV));
if (!is_cmd23_enabled() && (size > MMC_BLOCK_SIZE)) {
ret = mmc_send_cmd(MMC_CMD(12), 0, 0, NULL);
if (ret != 0) {
return 0;
}
}
return size;
}
size_t mmc_erase_blocks(int lba, size_t size)
{
int ret;
assert(ops != NULL);
assert((size != 0U) && ((size & MMC_BLOCK_MASK) == 0U));
ret = mmc_send_cmd(MMC_CMD(35), lba, MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return 0;
}
ret = mmc_send_cmd(MMC_CMD(36), lba + (size / MMC_BLOCK_SIZE) - 1U,
MMC_RESPONSE_R(1), NULL);
if (ret != 0) {
return 0;
}
ret = mmc_send_cmd(MMC_CMD(38), lba, MMC_RESPONSE_R(0x1B), NULL);
if (ret != 0) {
return 0;
}
do {
ret = mmc_device_state();
if (ret < 0) {
return 0;
}
} while (ret != MMC_STATE_TRAN);
return size;
}
static inline void mmc_rpmb_enable(void)
{
mmc_set_ext_csd(CMD_EXTCSD_PARTITION_CONFIG,
PART_CFG_BOOT_PARTITION1_ENABLE |
PART_CFG_PARTITION1_ACCESS);
}
static inline void mmc_rpmb_disable(void)
{
mmc_set_ext_csd(CMD_EXTCSD_PARTITION_CONFIG,
PART_CFG_BOOT_PARTITION1_ENABLE);
}
size_t mmc_rpmb_read_blocks(int lba, uintptr_t buf, size_t size)
{
size_t size_read;
mmc_rpmb_enable();
size_read = mmc_read_blocks(lba, buf, size);
mmc_rpmb_disable();
return size_read;
}
size_t mmc_rpmb_write_blocks(int lba, const uintptr_t buf, size_t size)
{
size_t size_written;
mmc_rpmb_enable();
size_written = mmc_write_blocks(lba, buf, size);
mmc_rpmb_disable();
return size_written;
}
size_t mmc_rpmb_erase_blocks(int lba, size_t size)
{
size_t size_erased;
mmc_rpmb_enable();
size_erased = mmc_erase_blocks(lba, size);
mmc_rpmb_disable();
return size_erased;
}
int mmc_init(const struct mmc_ops *ops_ptr, unsigned int clk,
unsigned int width, unsigned int flags,
struct mmc_device_info *device_info)
{
assert((ops_ptr != NULL) &&
(ops_ptr->init != NULL) &&
(ops_ptr->send_cmd != NULL) &&
(ops_ptr->set_ios != NULL) &&
(ops_ptr->prepare != NULL) &&
(ops_ptr->read != NULL) &&
(ops_ptr->write != NULL) &&
(device_info != NULL) &&
(clk != 0) &&
((width == MMC_BUS_WIDTH_1) ||
(width == MMC_BUS_WIDTH_4) ||
(width == MMC_BUS_WIDTH_8) ||
(width == MMC_BUS_WIDTH_DDR_4) ||
(width == MMC_BUS_WIDTH_DDR_8)));
ops = ops_ptr;
mmc_flags = flags;
mmc_dev_info = device_info;
return mmc_enumerate(clk, width);
}