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u-boot/drivers/mmc/mmc.c
Aswath Govindraju 2153a08a24 mmc: Check for device with a seq number equal to num before checking against index 
First check if there is an alias for the device tree node defined with the
given num before checking against device index.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-04-06 18:36:27 +08:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2008, Freescale Semiconductor, Inc
* Copyright 2020 NXP
* Andy Fleming
*
* Based vaguely on the Linux code
*/
#include <config.h>
#include <common.h>
#include <blk.h>
#include <command.h>
#include <dm.h>
#include <log.h>
#include <dm/device-internal.h>
#include <errno.h>
#include <mmc.h>
#include <part.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <power/regulator.h>
#include <malloc.h>
#include <memalign.h>
#include <linux/list.h>
#include <div64.h>
#include "mmc_private.h"
#define DEFAULT_CMD6_TIMEOUT_MS 500
static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage);
#if !CONFIG_IS_ENABLED(DM_MMC)
static int mmc_wait_dat0(struct mmc *mmc, int state, int timeout_us)
{
return -ENOSYS;
}
__weak int board_mmc_getwp(struct mmc *mmc)
{
return -1;
}
int mmc_getwp(struct mmc *mmc)
{
int wp;
wp = board_mmc_getwp(mmc);
if (wp < 0) {
if (mmc->cfg->ops->getwp)
wp = mmc->cfg->ops->getwp(mmc);
else
wp = 0;
}
return wp;
}
__weak int board_mmc_getcd(struct mmc *mmc)
{
return -1;
}
#endif
#ifdef CONFIG_MMC_TRACE
void mmmc_trace_before_send(struct mmc *mmc, struct mmc_cmd *cmd)
{
printf("CMD_SEND:%d\n", cmd->cmdidx);
printf("\t\tARG\t\t\t 0x%08x\n", cmd->cmdarg);
}
void mmmc_trace_after_send(struct mmc *mmc, struct mmc_cmd *cmd, int ret)
{
int i;
u8 *ptr;
if (ret) {
printf("\t\tRET\t\t\t %d\n", ret);
} else {
switch (cmd->resp_type) {
case MMC_RSP_NONE:
printf("\t\tMMC_RSP_NONE\n");
break;
case MMC_RSP_R1:
printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08x \n",
cmd->response[0]);
break;
case MMC_RSP_R1b:
printf("\t\tMMC_RSP_R1b\t\t 0x%08x \n",
cmd->response[0]);
break;
case MMC_RSP_R2:
printf("\t\tMMC_RSP_R2\t\t 0x%08x \n",
cmd->response[0]);
printf("\t\t \t\t 0x%08x \n",
cmd->response[1]);
printf("\t\t \t\t 0x%08x \n",
cmd->response[2]);
printf("\t\t \t\t 0x%08x \n",
cmd->response[3]);
printf("\n");
printf("\t\t\t\t\tDUMPING DATA\n");
for (i = 0; i < 4; i++) {
int j;
printf("\t\t\t\t\t%03d - ", i*4);
ptr = (u8 *)&cmd->response[i];
ptr += 3;
for (j = 0; j < 4; j++)
printf("%02x ", *ptr--);
printf("\n");
}
break;
case MMC_RSP_R3:
printf("\t\tMMC_RSP_R3,4\t\t 0x%08x \n",
cmd->response[0]);
break;
default:
printf("\t\tERROR MMC rsp not supported\n");
break;
}
}
}
void mmc_trace_state(struct mmc *mmc, struct mmc_cmd *cmd)
{
int status;
status = (cmd->response[0] & MMC_STATUS_CURR_STATE) >> 9;
printf("CURR STATE:%d\n", status);
}
#endif
#if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG)
const char *mmc_mode_name(enum bus_mode mode)
{
static const char *const names[] = {
[MMC_LEGACY] = "MMC legacy",
[MMC_HS] = "MMC High Speed (26MHz)",
[SD_HS] = "SD High Speed (50MHz)",
[UHS_SDR12] = "UHS SDR12 (25MHz)",
[UHS_SDR25] = "UHS SDR25 (50MHz)",
[UHS_SDR50] = "UHS SDR50 (100MHz)",
[UHS_SDR104] = "UHS SDR104 (208MHz)",
[UHS_DDR50] = "UHS DDR50 (50MHz)",
[MMC_HS_52] = "MMC High Speed (52MHz)",
[MMC_DDR_52] = "MMC DDR52 (52MHz)",
[MMC_HS_200] = "HS200 (200MHz)",
[MMC_HS_400] = "HS400 (200MHz)",
[MMC_HS_400_ES] = "HS400ES (200MHz)",
};
if (mode >= MMC_MODES_END)
return "Unknown mode";
else
return names[mode];
}
#endif
static uint mmc_mode2freq(struct mmc *mmc, enum bus_mode mode)
{
static const int freqs[] = {
[MMC_LEGACY] = 25000000,
[MMC_HS] = 26000000,
[SD_HS] = 50000000,
[MMC_HS_52] = 52000000,
[MMC_DDR_52] = 52000000,
[UHS_SDR12] = 25000000,
[UHS_SDR25] = 50000000,
[UHS_SDR50] = 100000000,
[UHS_DDR50] = 50000000,
[UHS_SDR104] = 208000000,
[MMC_HS_200] = 200000000,
[MMC_HS_400] = 200000000,
[MMC_HS_400_ES] = 200000000,
};
if (mode == MMC_LEGACY)
return mmc->legacy_speed;
else if (mode >= MMC_MODES_END)
return 0;
else
return freqs[mode];
}
static int mmc_select_mode(struct mmc *mmc, enum bus_mode mode)
{
mmc->selected_mode = mode;
mmc->tran_speed = mmc_mode2freq(mmc, mode);
mmc->ddr_mode = mmc_is_mode_ddr(mode);
pr_debug("selecting mode %s (freq : %d MHz)\n", mmc_mode_name(mode),
mmc->tran_speed / 1000000);
return 0;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
int ret;
mmmc_trace_before_send(mmc, cmd);
ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
mmmc_trace_after_send(mmc, cmd, ret);
return ret;
}
#endif
/**
* mmc_send_cmd_retry() - send a command to the mmc device, retrying on error
*
* @dev: device to receive the command
* @cmd: command to send
* @data: additional data to send/receive
* @retries: how many times to retry; mmc_send_cmd is always called at least
* once
* @return 0 if ok, -ve on error
*/
static int mmc_send_cmd_retry(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data, uint retries)
{
int ret;
do {
ret = mmc_send_cmd(mmc, cmd, data);
} while (ret && retries--);
return ret;
}
/**
* mmc_send_cmd_quirks() - send a command to the mmc device, retrying if a
* specific quirk is enabled
*
* @dev: device to receive the command
* @cmd: command to send
* @data: additional data to send/receive
* @quirk: retry only if this quirk is enabled
* @retries: how many times to retry; mmc_send_cmd is always called at least
* once
* @return 0 if ok, -ve on error
*/
static int mmc_send_cmd_quirks(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data, u32 quirk, uint retries)
{
if (CONFIG_IS_ENABLED(MMC_QUIRKS) && mmc->quirks & quirk)
return mmc_send_cmd_retry(mmc, cmd, data, retries);
else
return mmc_send_cmd(mmc, cmd, data);
}
int mmc_send_status(struct mmc *mmc, unsigned int *status)
{
struct mmc_cmd cmd;
int ret;
cmd.cmdidx = MMC_CMD_SEND_STATUS;
cmd.resp_type = MMC_RSP_R1;
if (!mmc_host_is_spi(mmc))
cmd.cmdarg = mmc->rca << 16;
ret = mmc_send_cmd_retry(mmc, &cmd, NULL, 4);
mmc_trace_state(mmc, &cmd);
if (!ret)
*status = cmd.response[0];
return ret;
}
int mmc_poll_for_busy(struct mmc *mmc, int timeout_ms)
{
unsigned int status;
int err;
err = mmc_wait_dat0(mmc, 1, timeout_ms * 1000);
if (err != -ENOSYS)
return err;
while (1) {
err = mmc_send_status(mmc, &status);
if (err)
return err;
if ((status & MMC_STATUS_RDY_FOR_DATA) &&
(status & MMC_STATUS_CURR_STATE) !=
MMC_STATE_PRG)
break;
if (status & MMC_STATUS_MASK) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
pr_err("Status Error: 0x%08x\n", status);
#endif
return -ECOMM;
}
if (timeout_ms-- <= 0)
break;
udelay(1000);
}
if (timeout_ms <= 0) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
pr_err("Timeout waiting card ready\n");
#endif
return -ETIMEDOUT;
}
return 0;
}
int mmc_set_blocklen(struct mmc *mmc, int len)
{
struct mmc_cmd cmd;
if (mmc->ddr_mode)
return 0;
cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = len;
return mmc_send_cmd_quirks(mmc, &cmd, NULL,
MMC_QUIRK_RETRY_SET_BLOCKLEN, 4);
}
#ifdef MMC_SUPPORTS_TUNING
static const u8 tuning_blk_pattern_4bit[] = {
0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
};
static const u8 tuning_blk_pattern_8bit[] = {
0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
};
int mmc_send_tuning(struct mmc *mmc, u32 opcode, int *cmd_error)
{
struct mmc_cmd cmd;
struct mmc_data data;
const u8 *tuning_block_pattern;
int size, err;
if (mmc->bus_width == 8) {
tuning_block_pattern = tuning_blk_pattern_8bit;
size = sizeof(tuning_blk_pattern_8bit);
} else if (mmc->bus_width == 4) {
tuning_block_pattern = tuning_blk_pattern_4bit;
size = sizeof(tuning_blk_pattern_4bit);
} else {
return -EINVAL;
}
ALLOC_CACHE_ALIGN_BUFFER(u8, data_buf, size);
cmd.cmdidx = opcode;
cmd.cmdarg = 0;
cmd.resp_type = MMC_RSP_R1;
data.dest = (void *)data_buf;
data.blocks = 1;
data.blocksize = size;
data.flags = MMC_DATA_READ;
err = mmc_send_cmd(mmc, &cmd, &data);
if (err)
return err;
if (memcmp(data_buf, tuning_block_pattern, size))
return -EIO;
return 0;
}
#endif
static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start,
lbaint_t blkcnt)
{
struct mmc_cmd cmd;
struct mmc_data data;
if (blkcnt > 1)
cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
else
cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
if (mmc->high_capacity)
cmd.cmdarg = start;
else
cmd.cmdarg = start * mmc->read_bl_len;
cmd.resp_type = MMC_RSP_R1;
data.dest = dst;
data.blocks = blkcnt;
data.blocksize = mmc->read_bl_len;
data.flags = MMC_DATA_READ;
if (mmc_send_cmd(mmc, &cmd, &data))
return 0;
if (blkcnt > 1) {
cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
cmd.cmdarg = 0;
cmd.resp_type = MMC_RSP_R1b;
if (mmc_send_cmd(mmc, &cmd, NULL)) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
pr_err("mmc fail to send stop cmd\n");
#endif
return 0;
}
}
return blkcnt;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
static int mmc_get_b_max(struct mmc *mmc, void *dst, lbaint_t blkcnt)
{
if (mmc->cfg->ops->get_b_max)
return mmc->cfg->ops->get_b_max(mmc, dst, blkcnt);
else
return mmc->cfg->b_max;
}
#endif
#if CONFIG_IS_ENABLED(BLK)
ulong mmc_bread(struct udevice *dev, lbaint_t start, lbaint_t blkcnt, void *dst)
#else
ulong mmc_bread(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt,
void *dst)
#endif
{
#if CONFIG_IS_ENABLED(BLK)
struct blk_desc *block_dev = dev_get_uclass_plat(dev);
#endif
int dev_num = block_dev->devnum;
int err;
lbaint_t cur, blocks_todo = blkcnt;
uint b_max;
if (blkcnt == 0)
return 0;
struct mmc *mmc = find_mmc_device(dev_num);
if (!mmc)
return 0;
if (CONFIG_IS_ENABLED(MMC_TINY))
err = mmc_switch_part(mmc, block_dev->hwpart);
else
err = blk_dselect_hwpart(block_dev, block_dev->hwpart);
if (err < 0)
return 0;
if ((start + blkcnt) > block_dev->lba) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
pr_err("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
start + blkcnt, block_dev->lba);
#endif
return 0;
}
if (mmc_set_blocklen(mmc, mmc->read_bl_len)) {
pr_debug("%s: Failed to set blocklen\n", __func__);
return 0;
}
b_max = mmc_get_b_max(mmc, dst, blkcnt);
do {
cur = (blocks_todo > b_max) ? b_max : blocks_todo;
if (mmc_read_blocks(mmc, dst, start, cur) != cur) {
pr_debug("%s: Failed to read blocks\n", __func__);
return 0;
}
blocks_todo -= cur;
start += cur;
dst += cur * mmc->read_bl_len;
} while (blocks_todo > 0);
return blkcnt;
}
static int mmc_go_idle(struct mmc *mmc)
{
struct mmc_cmd cmd;
int err;
udelay(1000);
cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
cmd.cmdarg = 0;
cmd.resp_type = MMC_RSP_NONE;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
udelay(2000);
return 0;
}
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage)
{
struct mmc_cmd cmd;
int err = 0;
/*
* Send CMD11 only if the request is to switch the card to
* 1.8V signalling.
*/
if (signal_voltage == MMC_SIGNAL_VOLTAGE_330)
return mmc_set_signal_voltage(mmc, signal_voltage);
cmd.cmdidx = SD_CMD_SWITCH_UHS18V;
cmd.cmdarg = 0;
cmd.resp_type = MMC_RSP_R1;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
if (!mmc_host_is_spi(mmc) && (cmd.response[0] & MMC_STATUS_ERROR))
return -EIO;
/*
* The card should drive cmd and dat[0:3] low immediately
* after the response of cmd11, but wait 100 us to be sure
*/
err = mmc_wait_dat0(mmc, 0, 100);
if (err == -ENOSYS)
udelay(100);
else if (err)
return -ETIMEDOUT;
/*
* During a signal voltage level switch, the clock must be gated
* for 5 ms according to the SD spec
*/
mmc_set_clock(mmc, mmc->clock, MMC_CLK_DISABLE);
err = mmc_set_signal_voltage(mmc, signal_voltage);
if (err)
return err;
/* Keep clock gated for at least 10 ms, though spec only says 5 ms */
mdelay(10);
mmc_set_clock(mmc, mmc->clock, MMC_CLK_ENABLE);
/*
* Failure to switch is indicated by the card holding
* dat[0:3] low. Wait for at least 1 ms according to spec
*/
err = mmc_wait_dat0(mmc, 1, 1000);
if (err == -ENOSYS)
udelay(1000);
else if (err)
return -ETIMEDOUT;
return 0;
}
#endif
static int sd_send_op_cond(struct mmc *mmc, bool uhs_en)
{
int timeout = 1000;
int err;
struct mmc_cmd cmd;
while (1) {
cmd.cmdidx = MMC_CMD_APP_CMD;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = 0;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
cmd.resp_type = MMC_RSP_R3;
/*
* Most cards do not answer if some reserved bits
* in the ocr are set. However, Some controller
* can set bit 7 (reserved for low voltages), but
* how to manage low voltages SD card is not yet
* specified.
*/
cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
(mmc->cfg->voltages & 0xff8000);
if (mmc->version == SD_VERSION_2)
cmd.cmdarg |= OCR_HCS;
if (uhs_en)
cmd.cmdarg |= OCR_S18R;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
if (cmd.response[0] & OCR_BUSY)
break;
if (timeout-- <= 0)
return -EOPNOTSUPP;
udelay(1000);
}
if (mmc->version != SD_VERSION_2)
mmc->version = SD_VERSION_1_0;
if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
cmd.resp_type = MMC_RSP_R3;
cmd.cmdarg = 0;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
}
mmc->ocr = cmd.response[0];
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
if (uhs_en && !(mmc_host_is_spi(mmc)) && (cmd.response[0] & 0x41000000)
== 0x41000000) {
err = mmc_switch_voltage(mmc, MMC_SIGNAL_VOLTAGE_180);
if (err)
return err;
}
#endif
mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
mmc->rca = 0;
return 0;
}
static int mmc_send_op_cond_iter(struct mmc *mmc, int use_arg)
{
struct mmc_cmd cmd;
int err;
cmd.cmdidx = MMC_CMD_SEND_OP_COND;
cmd.resp_type = MMC_RSP_R3;
cmd.cmdarg = 0;
if (use_arg && !mmc_host_is_spi(mmc))
cmd.cmdarg = OCR_HCS |
(mmc->cfg->voltages &
(mmc->ocr & OCR_VOLTAGE_MASK)) |
(mmc->ocr & OCR_ACCESS_MODE);
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
mmc->ocr = cmd.response[0];
return 0;
}
static int mmc_send_op_cond(struct mmc *mmc)
{
int err, i;
int timeout = 1000;
uint start;
/* Some cards seem to need this */
mmc_go_idle(mmc);
start = get_timer(0);
/* Asking to the card its capabilities */
for (i = 0; ; i++) {
err = mmc_send_op_cond_iter(mmc, i != 0);
if (err)
return err;
/* exit if not busy (flag seems to be inverted) */
if (mmc->ocr & OCR_BUSY)
break;
if (get_timer(start) > timeout)
return -ETIMEDOUT;
udelay(100);
}
mmc->op_cond_pending = 1;
return 0;
}
static int mmc_complete_op_cond(struct mmc *mmc)
{
struct mmc_cmd cmd;
int timeout = 1000;
ulong start;
int err;
mmc->op_cond_pending = 0;
if (!(mmc->ocr & OCR_BUSY)) {
/* Some cards seem to need this */
mmc_go_idle(mmc);
start = get_timer(0);
while (1) {
err = mmc_send_op_cond_iter(mmc, 1);
if (err)
return err;
if (mmc->ocr & OCR_BUSY)
break;
if (get_timer(start) > timeout)
return -EOPNOTSUPP;
udelay(100);
}
}
if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
cmd.resp_type = MMC_RSP_R3;
cmd.cmdarg = 0;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
mmc->ocr = cmd.response[0];
}
mmc->version = MMC_VERSION_UNKNOWN;
mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
mmc->rca = 1;
return 0;
}
int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
{
struct mmc_cmd cmd;
struct mmc_data data;
int err;
/* Get the Card Status Register */
cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = 0;
data.dest = (char *)ext_csd;
data.blocks = 1;
data.blocksize = MMC_MAX_BLOCK_LEN;
data.flags = MMC_DATA_READ;
err = mmc_send_cmd(mmc, &cmd, &data);
return err;
}
static int __mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value,
bool send_status)
{
unsigned int status, start;
struct mmc_cmd cmd;
int timeout_ms = DEFAULT_CMD6_TIMEOUT_MS;
bool is_part_switch = (set == EXT_CSD_CMD_SET_NORMAL) &&
(index == EXT_CSD_PART_CONF);
int ret;
if (mmc->gen_cmd6_time)
timeout_ms = mmc->gen_cmd6_time * 10;
if (is_part_switch && mmc->part_switch_time)
timeout_ms = mmc->part_switch_time * 10;
cmd.cmdidx = MMC_CMD_SWITCH;
cmd.resp_type = MMC_RSP_R1b;
cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
(index << 16) |
(value << 8);
ret = mmc_send_cmd_retry(mmc, &cmd, NULL, 3);
if (ret)
return ret;
start = get_timer(0);
/* poll dat0 for rdy/buys status */
ret = mmc_wait_dat0(mmc, 1, timeout_ms * 1000);
if (ret && ret != -ENOSYS)
return ret;
/*
* In cases when not allowed to poll by using CMD13 or because we aren't
* capable of polling by using mmc_wait_dat0, then rely on waiting the
* stated timeout to be sufficient.
*/
if (ret == -ENOSYS && !send_status) {
mdelay(timeout_ms);
return 0;
}
/* Finally wait until the card is ready or indicates a failure
* to switch. It doesn't hurt to use CMD13 here even if send_status
* is false, because by now (after 'timeout_ms' ms) the bus should be
* reliable.
*/
do {
ret = mmc_send_status(mmc, &status);
if (!ret && (status & MMC_STATUS_SWITCH_ERROR)) {
pr_debug("switch failed %d/%d/0x%x !\n", set, index,
value);
return -EIO;
}
if (!ret && (status & MMC_STATUS_RDY_FOR_DATA) &&
(status & MMC_STATUS_CURR_STATE) == MMC_STATE_TRANS)
return 0;
udelay(100);
} while (get_timer(start) < timeout_ms);
return -ETIMEDOUT;
}
int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
{
return __mmc_switch(mmc, set, index, value, true);
}
int mmc_boot_wp(struct mmc *mmc)
{
return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP, 1);
}
#if !CONFIG_IS_ENABLED(MMC_TINY)
static int mmc_set_card_speed(struct mmc *mmc, enum bus_mode mode,
bool hsdowngrade)
{
int err;
int speed_bits;
ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
switch (mode) {
case MMC_HS:
case MMC_HS_52:
case MMC_DDR_52:
speed_bits = EXT_CSD_TIMING_HS;
break;
#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
case MMC_HS_200:
speed_bits = EXT_CSD_TIMING_HS200;
break;
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
case MMC_HS_400:
speed_bits = EXT_CSD_TIMING_HS400;
break;
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
case MMC_HS_400_ES:
speed_bits = EXT_CSD_TIMING_HS400;
break;
#endif
case MMC_LEGACY:
speed_bits = EXT_CSD_TIMING_LEGACY;
break;
default:
return -EINVAL;
}
err = __mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
speed_bits, !hsdowngrade);
if (err)
return err;
#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
/*
* In case the eMMC is in HS200/HS400 mode and we are downgrading
* to HS mode, the card clock are still running much faster than
* the supported HS mode clock, so we can not reliably read out
* Extended CSD. Reconfigure the controller to run at HS mode.
*/
if (hsdowngrade) {
mmc_select_mode(mmc, MMC_HS);
mmc_set_clock(mmc, mmc_mode2freq(mmc, MMC_HS), false);
}
#endif
if ((mode == MMC_HS) || (mode == MMC_HS_52)) {
/* Now check to see that it worked */
err = mmc_send_ext_csd(mmc, test_csd);
if (err)
return err;
/* No high-speed support */
if (!test_csd[EXT_CSD_HS_TIMING])
return -ENOTSUPP;
}
return 0;
}
static int mmc_get_capabilities(struct mmc *mmc)
{
u8 *ext_csd = mmc->ext_csd;
char cardtype;
mmc->card_caps = MMC_MODE_1BIT | MMC_CAP(MMC_LEGACY);
if (mmc_host_is_spi(mmc))
return 0;
/* Only version 4 supports high-speed */
if (mmc->version < MMC_VERSION_4)
return 0;
if (!ext_csd) {
pr_err("No ext_csd found!\n"); /* this should enver happen */
return -ENOTSUPP;
}
mmc->card_caps |= MMC_MODE_4BIT | MMC_MODE_8BIT;
cardtype = ext_csd[EXT_CSD_CARD_TYPE];
mmc->cardtype = cardtype;
#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
if (cardtype & (EXT_CSD_CARD_TYPE_HS200_1_2V |
EXT_CSD_CARD_TYPE_HS200_1_8V)) {
mmc->card_caps |= MMC_MODE_HS200;
}
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
if (cardtype & (EXT_CSD_CARD_TYPE_HS400_1_2V |
EXT_CSD_CARD_TYPE_HS400_1_8V)) {
mmc->card_caps |= MMC_MODE_HS400;
}
#endif
if (cardtype & EXT_CSD_CARD_TYPE_52) {
if (cardtype & EXT_CSD_CARD_TYPE_DDR_52)
mmc->card_caps |= MMC_MODE_DDR_52MHz;
mmc->card_caps |= MMC_MODE_HS_52MHz;
}
if (cardtype & EXT_CSD_CARD_TYPE_26)
mmc->card_caps |= MMC_MODE_HS;
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
if (ext_csd[EXT_CSD_STROBE_SUPPORT] &&
(mmc->card_caps & MMC_MODE_HS400)) {
mmc->card_caps |= MMC_MODE_HS400_ES;
}
#endif
return 0;
}
#endif
static int mmc_set_capacity(struct mmc *mmc, int part_num)
{
switch (part_num) {
case 0:
mmc->capacity = mmc->capacity_user;
break;
case 1:
case 2:
mmc->capacity = mmc->capacity_boot;
break;
case 3:
mmc->capacity = mmc->capacity_rpmb;
break;
case 4:
case 5:
case 6:
case 7:
mmc->capacity = mmc->capacity_gp[part_num - 4];
break;
default:
return -1;
}
mmc_get_blk_desc(mmc)->lba = lldiv(mmc->capacity, mmc->read_bl_len);
return 0;
}
int mmc_switch_part(struct mmc *mmc, unsigned int part_num)
{
int ret;
int retry = 3;
do {
ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PART_CONF,
(mmc->part_config & ~PART_ACCESS_MASK)
| (part_num & PART_ACCESS_MASK));
} while (ret && retry--);
/*
* Set the capacity if the switch succeeded or was intended
* to return to representing the raw device.
*/
if ((ret == 0) || ((ret == -ENODEV) && (part_num == 0))) {
ret = mmc_set_capacity(mmc, part_num);
mmc_get_blk_desc(mmc)->hwpart = part_num;
}
return ret;
}
#if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING)
int mmc_hwpart_config(struct mmc *mmc,
const struct mmc_hwpart_conf *conf,
enum mmc_hwpart_conf_mode mode)
{
u8 part_attrs = 0;
u32 enh_size_mult;
u32 enh_start_addr;
u32 gp_size_mult[4];
u32 max_enh_size_mult;
u32 tot_enh_size_mult = 0;
u8 wr_rel_set;
int i, pidx, err;
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
if (mode < MMC_HWPART_CONF_CHECK || mode > MMC_HWPART_CONF_COMPLETE)
return -EINVAL;
if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4_41)) {
pr_err("eMMC >= 4.4 required for enhanced user data area\n");
return -EMEDIUMTYPE;
}
if (!(mmc->part_support & PART_SUPPORT)) {
pr_err("Card does not support partitioning\n");
return -EMEDIUMTYPE;
}
if (!mmc->hc_wp_grp_size) {
pr_err("Card does not define HC WP group size\n");
return -EMEDIUMTYPE;
}
/* check partition alignment and total enhanced size */
if (conf->user.enh_size) {
if (conf->user.enh_size % mmc->hc_wp_grp_size ||
conf->user.enh_start % mmc->hc_wp_grp_size) {
pr_err("User data enhanced area not HC WP group "
"size aligned\n");
return -EINVAL;
}
part_attrs |= EXT_CSD_ENH_USR;
enh_size_mult = conf->user.enh_size / mmc->hc_wp_grp_size;
if (mmc->high_capacity) {
enh_start_addr = conf->user.enh_start;
} else {
enh_start_addr = (conf->user.enh_start << 9);
}
} else {
enh_size_mult = 0;
enh_start_addr = 0;
}
tot_enh_size_mult += enh_size_mult;
for (pidx = 0; pidx < 4; pidx++) {
if (conf->gp_part[pidx].size % mmc->hc_wp_grp_size) {
pr_err("GP%i partition not HC WP group size "
"aligned\n", pidx+1);
return -EINVAL;
}
gp_size_mult[pidx] = conf->gp_part[pidx].size / mmc->hc_wp_grp_size;
if (conf->gp_part[pidx].size && conf->gp_part[pidx].enhanced) {
part_attrs |= EXT_CSD_ENH_GP(pidx);
tot_enh_size_mult += gp_size_mult[pidx];
}
}
if (part_attrs && ! (mmc->part_support & ENHNCD_SUPPORT)) {
pr_err("Card does not support enhanced attribute\n");
return -EMEDIUMTYPE;
}
err = mmc_send_ext_csd(mmc, ext_csd);
if (err)
return err;
max_enh_size_mult =
(ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+2] << 16) +
(ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+1] << 8) +
ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT];
if (tot_enh_size_mult > max_enh_size_mult) {
pr_err("Total enhanced size exceeds maximum (%u > %u)\n",
tot_enh_size_mult, max_enh_size_mult);
return -EMEDIUMTYPE;
}
/* The default value of EXT_CSD_WR_REL_SET is device
* dependent, the values can only be changed if the
* EXT_CSD_HS_CTRL_REL bit is set. The values can be
* changed only once and before partitioning is completed. */
wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET];
if (conf->user.wr_rel_change) {
if (conf->user.wr_rel_set)
wr_rel_set |= EXT_CSD_WR_DATA_REL_USR;
else
wr_rel_set &= ~EXT_CSD_WR_DATA_REL_USR;
}
for (pidx = 0; pidx < 4; pidx++) {
if (conf->gp_part[pidx].wr_rel_change) {
if (conf->gp_part[pidx].wr_rel_set)
wr_rel_set |= EXT_CSD_WR_DATA_REL_GP(pidx);
else
wr_rel_set &= ~EXT_CSD_WR_DATA_REL_GP(pidx);
}
}
if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET] &&
!(ext_csd[EXT_CSD_WR_REL_PARAM] & EXT_CSD_HS_CTRL_REL)) {
puts("Card does not support host controlled partition write "
"reliability settings\n");
return -EMEDIUMTYPE;
}
if (ext_csd[EXT_CSD_PARTITION_SETTING] &
EXT_CSD_PARTITION_SETTING_COMPLETED) {
pr_err("Card already partitioned\n");
return -EPERM;
}
if (mode == MMC_HWPART_CONF_CHECK)
return 0;
/* Partitioning requires high-capacity size definitions */
if (!(ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01)) {
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ERASE_GROUP_DEF, 1);
if (err)
return err;
ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
#if CONFIG_IS_ENABLED(MMC_WRITE)
/* update erase group size to be high-capacity */
mmc->erase_grp_size =
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024;
#endif
}
/* all OK, write the configuration */
for (i = 0; i < 4; i++) {
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ENH_START_ADDR+i,
(enh_start_addr >> (i*8)) & 0xFF);
if (err)
return err;
}
for (i = 0; i < 3; i++) {
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ENH_SIZE_MULT+i,
(enh_size_mult >> (i*8)) & 0xFF);
if (err)
return err;
}
for (pidx = 0; pidx < 4; pidx++) {
for (i = 0; i < 3; i++) {
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_GP_SIZE_MULT+pidx*3+i,
(gp_size_mult[pidx] >> (i*8)) & 0xFF);
if (err)
return err;
}
}
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PARTITIONS_ATTRIBUTE, part_attrs);
if (err)
return err;
if (mode == MMC_HWPART_CONF_SET)
return 0;
/* The WR_REL_SET is a write-once register but shall be
* written before setting PART_SETTING_COMPLETED. As it is
* write-once we can only write it when completing the
* partitioning. */
if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET]) {
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_WR_REL_SET, wr_rel_set);
if (err)
return err;
}
/* Setting PART_SETTING_COMPLETED confirms the partition
* configuration but it only becomes effective after power
* cycle, so we do not adjust the partition related settings
* in the mmc struct. */
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PARTITION_SETTING,
EXT_CSD_PARTITION_SETTING_COMPLETED);
if (err)
return err;
return 0;
}
#endif
#if !CONFIG_IS_ENABLED(DM_MMC)
int mmc_getcd(struct mmc *mmc)
{
int cd;
cd = board_mmc_getcd(mmc);
if (cd < 0) {
if (mmc->cfg->ops->getcd)
cd = mmc->cfg->ops->getcd(mmc);
else
cd = 1;
}
return cd;
}
#endif
#if !CONFIG_IS_ENABLED(MMC_TINY)
static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
{
struct mmc_cmd cmd;
struct mmc_data data;
/* Switch the frequency */
cmd.cmdidx = SD_CMD_SWITCH_FUNC;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = (mode << 31) | 0xffffff;
cmd.cmdarg &= ~(0xf << (group * 4));
cmd.cmdarg |= value << (group * 4);
data.dest = (char *)resp;
data.blocksize = 64;
data.blocks = 1;
data.flags = MMC_DATA_READ;
return mmc_send_cmd(mmc, &cmd, &data);
}
static int sd_get_capabilities(struct mmc *mmc)
{
int err;
struct mmc_cmd cmd;
ALLOC_CACHE_ALIGN_BUFFER(__be32, scr, 2);
ALLOC_CACHE_ALIGN_BUFFER(__be32, switch_status, 16);
struct mmc_data data;
int timeout;
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
u32 sd3_bus_mode;
#endif
mmc->card_caps = MMC_MODE_1BIT | MMC_CAP(MMC_LEGACY);
if (mmc_host_is_spi(mmc))
return 0;
/* Read the SCR to find out if this card supports higher speeds */
cmd.cmdidx = MMC_CMD_APP_CMD;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = mmc->rca << 16;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
cmd.cmdidx = SD_CMD_APP_SEND_SCR;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = 0;
data.dest = (char *)scr;
data.blocksize = 8;
data.blocks = 1;
data.flags = MMC_DATA_READ;
err = mmc_send_cmd_retry(mmc, &cmd, &data, 3);
if (err)
return err;
mmc->scr[0] = __be32_to_cpu(scr[0]);
mmc->scr[1] = __be32_to_cpu(scr[1]);
switch ((mmc->scr[0] >> 24) & 0xf) {
case 0:
mmc->version = SD_VERSION_1_0;
break;
case 1:
mmc->version = SD_VERSION_1_10;
break;
case 2:
mmc->version = SD_VERSION_2;
if ((mmc->scr[0] >> 15) & 0x1)
mmc->version = SD_VERSION_3;
break;
default:
mmc->version = SD_VERSION_1_0;
break;
}
if (mmc->scr[0] & SD_DATA_4BIT)
mmc->card_caps |= MMC_MODE_4BIT;
/* Version 1.0 doesn't support switching */
if (mmc->version == SD_VERSION_1_0)
return 0;
timeout = 4;
while (timeout--) {
err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
(u8 *)switch_status);
if (err)
return err;
/* The high-speed function is busy. Try again */
if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
break;
}
/* If high-speed isn't supported, we return */
if (__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED)
mmc->card_caps |= MMC_CAP(SD_HS);
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
/* Version before 3.0 don't support UHS modes */
if (mmc->version < SD_VERSION_3)
return 0;
sd3_bus_mode = __be32_to_cpu(switch_status[3]) >> 16 & 0x1f;
if (sd3_bus_mode & SD_MODE_UHS_SDR104)
mmc->card_caps |= MMC_CAP(UHS_SDR104);
if (sd3_bus_mode & SD_MODE_UHS_SDR50)
mmc->card_caps |= MMC_CAP(UHS_SDR50);
if (sd3_bus_mode & SD_MODE_UHS_SDR25)
mmc->card_caps |= MMC_CAP(UHS_SDR25);
if (sd3_bus_mode & SD_MODE_UHS_SDR12)
mmc->card_caps |= MMC_CAP(UHS_SDR12);
if (sd3_bus_mode & SD_MODE_UHS_DDR50)
mmc->card_caps |= MMC_CAP(UHS_DDR50);
#endif
return 0;
}
static int sd_set_card_speed(struct mmc *mmc, enum bus_mode mode)
{
int err;
ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
int speed;
/* SD version 1.00 and 1.01 does not support CMD 6 */
if (mmc->version == SD_VERSION_1_0)
return 0;
switch (mode) {
case MMC_LEGACY:
speed = UHS_SDR12_BUS_SPEED;
break;
case SD_HS:
speed = HIGH_SPEED_BUS_SPEED;
break;
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
case UHS_SDR12:
speed = UHS_SDR12_BUS_SPEED;
break;
case UHS_SDR25:
speed = UHS_SDR25_BUS_SPEED;
break;
case UHS_SDR50:
speed = UHS_SDR50_BUS_SPEED;
break;
case UHS_DDR50:
speed = UHS_DDR50_BUS_SPEED;
break;
case UHS_SDR104:
speed = UHS_SDR104_BUS_SPEED;
break;
#endif
default:
return -EINVAL;
}
err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, speed, (u8 *)switch_status);
if (err)
return err;
if (((__be32_to_cpu(switch_status[4]) >> 24) & 0xF) != speed)
return -ENOTSUPP;
return 0;
}
static int sd_select_bus_width(struct mmc *mmc, int w)
{
int err;
struct mmc_cmd cmd;
if ((w != 4) && (w != 1))
return -EINVAL;
cmd.cmdidx = MMC_CMD_APP_CMD;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = mmc->rca << 16;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
cmd.resp_type = MMC_RSP_R1;
if (w == 4)
cmd.cmdarg = 2;
else if (w == 1)
cmd.cmdarg = 0;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
return 0;
}
#endif
#if CONFIG_IS_ENABLED(MMC_WRITE)
static int sd_read_ssr(struct mmc *mmc)
{
static const unsigned int sd_au_size[] = {
0, SZ_16K / 512, SZ_32K / 512,
SZ_64K / 512, SZ_128K / 512, SZ_256K / 512,
SZ_512K / 512, SZ_1M / 512, SZ_2M / 512,
SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512,
SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512,
SZ_64M / 512,
};
int err, i;
struct mmc_cmd cmd;
ALLOC_CACHE_ALIGN_BUFFER(uint, ssr, 16);
struct mmc_data data;
unsigned int au, eo, et, es;
cmd.cmdidx = MMC_CMD_APP_CMD;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = mmc->rca << 16;
err = mmc_send_cmd_quirks(mmc, &cmd, NULL, MMC_QUIRK_RETRY_APP_CMD, 4);
if (err)
return err;
cmd.cmdidx = SD_CMD_APP_SD_STATUS;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = 0;
data.dest = (char *)ssr;
data.blocksize = 64;
data.blocks = 1;
data.flags = MMC_DATA_READ;
err = mmc_send_cmd_retry(mmc, &cmd, &data, 3);
if (err)
return err;
for (i = 0; i < 16; i++)
ssr[i] = be32_to_cpu(ssr[i]);
au = (ssr[2] >> 12) & 0xF;
if ((au <= 9) || (mmc->version == SD_VERSION_3)) {
mmc->ssr.au = sd_au_size[au];
es = (ssr[3] >> 24) & 0xFF;
es |= (ssr[2] & 0xFF) << 8;
et = (ssr[3] >> 18) & 0x3F;
if (es && et) {
eo = (ssr[3] >> 16) & 0x3;
mmc->ssr.erase_timeout = (et * 1000) / es;
mmc->ssr.erase_offset = eo * 1000;
}
} else {
pr_debug("Invalid Allocation Unit Size.\n");
}
return 0;
}
#endif
/* frequency bases */
/* divided by 10 to be nice to platforms without floating point */
static const int fbase[] = {
10000,
100000,
1000000,
10000000,
};
/* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
* to platforms without floating point.
*/
static const u8 multipliers[] = {
0, /* reserved */
10,
12,
13,
15,
20,
25,
30,
35,
40,
45,
50,
55,
60,
70,
80,
};
static inline int bus_width(uint cap)
{
if (cap == MMC_MODE_8BIT)
return 8;
if (cap == MMC_MODE_4BIT)
return 4;
if (cap == MMC_MODE_1BIT)
return 1;
pr_warn("invalid bus witdh capability 0x%x\n", cap);
return 0;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
#ifdef MMC_SUPPORTS_TUNING
static int mmc_execute_tuning(struct mmc *mmc, uint opcode)
{
return -ENOTSUPP;
}
#endif
static int mmc_set_ios(struct mmc *mmc)
{
int ret = 0;
if (mmc->cfg->ops->set_ios)
ret = mmc->cfg->ops->set_ios(mmc);
return ret;
}
static int mmc_host_power_cycle(struct mmc *mmc)
{
int ret = 0;
if (mmc->cfg->ops->host_power_cycle)
ret = mmc->cfg->ops->host_power_cycle(mmc);
return ret;
}
#endif
int mmc_set_clock(struct mmc *mmc, uint clock, bool disable)
{
if (!disable) {
if (clock > mmc->cfg->f_max)
clock = mmc->cfg->f_max;
if (clock < mmc->cfg->f_min)
clock = mmc->cfg->f_min;
}
mmc->clock = clock;
mmc->clk_disable = disable;
debug("clock is %s (%dHz)\n", disable ? "disabled" : "enabled", clock);
return mmc_set_ios(mmc);
}
static int mmc_set_bus_width(struct mmc *mmc, uint width)
{
mmc->bus_width = width;
return mmc_set_ios(mmc);
}
#if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG)
/*
* helper function to display the capabilities in a human
* friendly manner. The capabilities include bus width and
* supported modes.
*/
void mmc_dump_capabilities(const char *text, uint caps)
{
enum bus_mode mode;
pr_debug("%s: widths [", text);
if (caps & MMC_MODE_8BIT)
pr_debug("8, ");
if (caps & MMC_MODE_4BIT)
pr_debug("4, ");
if (caps & MMC_MODE_1BIT)
pr_debug("1, ");
pr_debug("\b\b] modes [");
for (mode = MMC_LEGACY; mode < MMC_MODES_END; mode++)
if (MMC_CAP(mode) & caps)
pr_debug("%s, ", mmc_mode_name(mode));
pr_debug("\b\b]\n");
}
#endif
struct mode_width_tuning {
enum bus_mode mode;
uint widths;
#ifdef MMC_SUPPORTS_TUNING
uint tuning;
#endif
};
#if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
int mmc_voltage_to_mv(enum mmc_voltage voltage)
{
switch (voltage) {
case MMC_SIGNAL_VOLTAGE_000: return 0;
case MMC_SIGNAL_VOLTAGE_330: return 3300;
case MMC_SIGNAL_VOLTAGE_180: return 1800;
case MMC_SIGNAL_VOLTAGE_120: return 1200;
}
return -EINVAL;
}
static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)
{
int err;
if (mmc->signal_voltage == signal_voltage)
return 0;
mmc->signal_voltage = signal_voltage;
err = mmc_set_ios(mmc);
if (err)
pr_debug("unable to set voltage (err %d)\n", err);
return err;
}
#else
static inline int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)
{
return 0;
}
#endif
#if !CONFIG_IS_ENABLED(MMC_TINY)
static const struct mode_width_tuning sd_modes_by_pref[] = {
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
#ifdef MMC_SUPPORTS_TUNING
{
.mode = UHS_SDR104,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
.tuning = MMC_CMD_SEND_TUNING_BLOCK
},
#endif
{
.mode = UHS_SDR50,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
},
{
.mode = UHS_DDR50,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
},
{
.mode = UHS_SDR25,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
},
#endif
{
.mode = SD_HS,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
},
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
{
.mode = UHS_SDR12,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
},
#endif
{
.mode = MMC_LEGACY,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
}
};
#define for_each_sd_mode_by_pref(caps, mwt) \
for (mwt = sd_modes_by_pref;\
mwt < sd_modes_by_pref + ARRAY_SIZE(sd_modes_by_pref);\
mwt++) \
if (caps & MMC_CAP(mwt->mode))
static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
{
int err;
uint widths[] = {MMC_MODE_4BIT, MMC_MODE_1BIT};
const struct mode_width_tuning *mwt;
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
bool uhs_en = (mmc->ocr & OCR_S18R) ? true : false;
#else
bool uhs_en = false;
#endif
uint caps;
#ifdef DEBUG
mmc_dump_capabilities("sd card", card_caps);
mmc_dump_capabilities("host", mmc->host_caps);
#endif
if (mmc_host_is_spi(mmc)) {
mmc_set_bus_width(mmc, 1);
mmc_select_mode(mmc, MMC_LEGACY);
mmc_set_clock(mmc, mmc->tran_speed, MMC_CLK_ENABLE);
#if CONFIG_IS_ENABLED(MMC_WRITE)
err = sd_read_ssr(mmc);
if (err)
pr_warn("unable to read ssr\n");
#endif
return 0;
}
/* Restrict card's capabilities by what the host can do */
caps = card_caps & mmc->host_caps;
if (!uhs_en)
caps &= ~UHS_CAPS;
for_each_sd_mode_by_pref(caps, mwt) {
uint *w;
for (w = widths; w < widths + ARRAY_SIZE(widths); w++) {
if (*w & caps & mwt->widths) {
pr_debug("trying mode %s width %d (at %d MHz)\n",
mmc_mode_name(mwt->mode),
bus_width(*w),
mmc_mode2freq(mmc, mwt->mode) / 1000000);
/* configure the bus width (card + host) */
err = sd_select_bus_width(mmc, bus_width(*w));
if (err)
goto error;
mmc_set_bus_width(mmc, bus_width(*w));
/* configure the bus mode (card) */
err = sd_set_card_speed(mmc, mwt->mode);
if (err)
goto error;
/* configure the bus mode (host) */
mmc_select_mode(mmc, mwt->mode);
mmc_set_clock(mmc, mmc->tran_speed,
MMC_CLK_ENABLE);
#ifdef MMC_SUPPORTS_TUNING
/* execute tuning if needed */
if (mwt->tuning && !mmc_host_is_spi(mmc)) {
err = mmc_execute_tuning(mmc,
mwt->tuning);
if (err) {
pr_debug("tuning failed\n");
goto error;
}
}
#endif
#if CONFIG_IS_ENABLED(MMC_WRITE)
err = sd_read_ssr(mmc);
if (err)
pr_warn("unable to read ssr\n");
#endif
if (!err)
return 0;
error:
/* revert to a safer bus speed */
mmc_select_mode(mmc, MMC_LEGACY);
mmc_set_clock(mmc, mmc->tran_speed,
MMC_CLK_ENABLE);
}
}
}
pr_err("unable to select a mode\n");
return -ENOTSUPP;
}
/*
* read the compare the part of ext csd that is constant.
* This can be used to check that the transfer is working
* as expected.
*/
static int mmc_read_and_compare_ext_csd(struct mmc *mmc)
{
int err;
const u8 *ext_csd = mmc->ext_csd;
ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
if (mmc->version < MMC_VERSION_4)
return 0;
err = mmc_send_ext_csd(mmc, test_csd);
if (err)
return err;
/* Only compare read only fields */
if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT]
== test_csd[EXT_CSD_PARTITIONING_SUPPORT] &&
ext_csd[EXT_CSD_HC_WP_GRP_SIZE]
== test_csd[EXT_CSD_HC_WP_GRP_SIZE] &&
ext_csd[EXT_CSD_REV]
== test_csd[EXT_CSD_REV] &&
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
== test_csd[EXT_CSD_HC_ERASE_GRP_SIZE] &&
memcmp(&ext_csd[EXT_CSD_SEC_CNT],
&test_csd[EXT_CSD_SEC_CNT], 4) == 0)
return 0;
return -EBADMSG;
}
#if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
static int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
uint32_t allowed_mask)
{
u32 card_mask = 0;
switch (mode) {
case MMC_HS_400_ES:
case MMC_HS_400:
case MMC_HS_200:
if (mmc->cardtype & (EXT_CSD_CARD_TYPE_HS200_1_8V |
EXT_CSD_CARD_TYPE_HS400_1_8V))
card_mask |= MMC_SIGNAL_VOLTAGE_180;
if (mmc->cardtype & (EXT_CSD_CARD_TYPE_HS200_1_2V |
EXT_CSD_CARD_TYPE_HS400_1_2V))
card_mask |= MMC_SIGNAL_VOLTAGE_120;
break;
case MMC_DDR_52:
if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_8V)
card_mask |= MMC_SIGNAL_VOLTAGE_330 |
MMC_SIGNAL_VOLTAGE_180;
if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_2V)
card_mask |= MMC_SIGNAL_VOLTAGE_120;
break;
default:
card_mask |= MMC_SIGNAL_VOLTAGE_330;
break;
}
while (card_mask & allowed_mask) {
enum mmc_voltage best_match;
best_match = 1 << (ffs(card_mask & allowed_mask) - 1);
if (!mmc_set_signal_voltage(mmc, best_match))
return 0;
allowed_mask &= ~best_match;
}
return -ENOTSUPP;
}
#else
static inline int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
uint32_t allowed_mask)
{
return 0;
}
#endif
static const struct mode_width_tuning mmc_modes_by_pref[] = {
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
{
.mode = MMC_HS_400_ES,
.widths = MMC_MODE_8BIT,
},
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
{
.mode = MMC_HS_400,
.widths = MMC_MODE_8BIT,
.tuning = MMC_CMD_SEND_TUNING_BLOCK_HS200
},
#endif
#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
{
.mode = MMC_HS_200,
.widths = MMC_MODE_8BIT | MMC_MODE_4BIT,
.tuning = MMC_CMD_SEND_TUNING_BLOCK_HS200
},
#endif
{
.mode = MMC_DDR_52,
.widths = MMC_MODE_8BIT | MMC_MODE_4BIT,
},
{
.mode = MMC_HS_52,
.widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT,
},
{
.mode = MMC_HS,
.widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT,
},
{
.mode = MMC_LEGACY,
.widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT,
}
};
#define for_each_mmc_mode_by_pref(caps, mwt) \
for (mwt = mmc_modes_by_pref;\
mwt < mmc_modes_by_pref + ARRAY_SIZE(mmc_modes_by_pref);\
mwt++) \
if (caps & MMC_CAP(mwt->mode))
static const struct ext_csd_bus_width {
uint cap;
bool is_ddr;
uint ext_csd_bits;
} ext_csd_bus_width[] = {
{MMC_MODE_8BIT, true, EXT_CSD_DDR_BUS_WIDTH_8},
{MMC_MODE_4BIT, true, EXT_CSD_DDR_BUS_WIDTH_4},
{MMC_MODE_8BIT, false, EXT_CSD_BUS_WIDTH_8},
{MMC_MODE_4BIT, false, EXT_CSD_BUS_WIDTH_4},
{MMC_MODE_1BIT, false, EXT_CSD_BUS_WIDTH_1},
};
#if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
static int mmc_select_hs400(struct mmc *mmc)
{
int err;
/* Set timing to HS200 for tuning */
err = mmc_set_card_speed(mmc, MMC_HS_200, false);
if (err)
return err;
/* configure the bus mode (host) */
mmc_select_mode(mmc, MMC_HS_200);
mmc_set_clock(mmc, mmc->tran_speed, false);
/* execute tuning if needed */
mmc->hs400_tuning = 1;
err = mmc_execute_tuning(mmc, MMC_CMD_SEND_TUNING_BLOCK_HS200);
mmc->hs400_tuning = 0;
if (err) {
debug("tuning failed\n");
return err;
}
/* Set back to HS */
mmc_set_card_speed(mmc, MMC_HS, true);
err = mmc_hs400_prepare_ddr(mmc);
if (err)
return err;
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_FLAG);
if (err)
return err;
err = mmc_set_card_speed(mmc, MMC_HS_400, false);
if (err)
return err;
mmc_select_mode(mmc, MMC_HS_400);
err = mmc_set_clock(mmc, mmc->tran_speed, false);
if (err)
return err;
return 0;
}
#else
static int mmc_select_hs400(struct mmc *mmc)
{
return -ENOTSUPP;
}
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
#if !CONFIG_IS_ENABLED(DM_MMC)
static int mmc_set_enhanced_strobe(struct mmc *mmc)
{
return -ENOTSUPP;
}
#endif
static int mmc_select_hs400es(struct mmc *mmc)
{
int err;
err = mmc_set_card_speed(mmc, MMC_HS, true);
if (err)
return err;
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_FLAG |
EXT_CSD_BUS_WIDTH_STROBE);
if (err) {
printf("switch to bus width for hs400 failed\n");
return err;
}
/* TODO: driver strength */
err = mmc_set_card_speed(mmc, MMC_HS_400_ES, false);
if (err)
return err;
mmc_select_mode(mmc, MMC_HS_400_ES);
err = mmc_set_clock(mmc, mmc->tran_speed, false);
if (err)
return err;
return mmc_set_enhanced_strobe(mmc);
}
#else
static int mmc_select_hs400es(struct mmc *mmc)
{
return -ENOTSUPP;
}
#endif
#define for_each_supported_width(caps, ddr, ecbv) \
for (ecbv = ext_csd_bus_width;\
ecbv < ext_csd_bus_width + ARRAY_SIZE(ext_csd_bus_width);\
ecbv++) \
if ((ddr == ecbv->is_ddr) && (caps & ecbv->cap))
static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps)
{
int err = 0;
const struct mode_width_tuning *mwt;
const struct ext_csd_bus_width *ecbw;
#ifdef DEBUG
mmc_dump_capabilities("mmc", card_caps);
mmc_dump_capabilities("host", mmc->host_caps);
#endif
if (mmc_host_is_spi(mmc)) {
mmc_set_bus_width(mmc, 1);
mmc_select_mode(mmc, MMC_LEGACY);
mmc_set_clock(mmc, mmc->tran_speed, MMC_CLK_ENABLE);
return 0;
}
/* Restrict card's capabilities by what the host can do */
card_caps &= mmc->host_caps;
/* Only version 4 of MMC supports wider bus widths */
if (mmc->version < MMC_VERSION_4)
return 0;
if (!mmc->ext_csd) {
pr_debug("No ext_csd found!\n"); /* this should enver happen */
return -ENOTSUPP;
}
#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
/*
* In case the eMMC is in HS200/HS400 mode, downgrade to HS mode
* before doing anything else, since a transition from either of
* the HS200/HS400 mode directly to legacy mode is not supported.
*/
if (mmc->selected_mode == MMC_HS_200 ||
mmc->selected_mode == MMC_HS_400)
mmc_set_card_speed(mmc, MMC_HS, true);
else
#endif
mmc_set_clock(mmc, mmc->legacy_speed, MMC_CLK_ENABLE);
for_each_mmc_mode_by_pref(card_caps, mwt) {
for_each_supported_width(card_caps & mwt->widths,
mmc_is_mode_ddr(mwt->mode), ecbw) {
enum mmc_voltage old_voltage;
pr_debug("trying mode %s width %d (at %d MHz)\n",
mmc_mode_name(mwt->mode),
bus_width(ecbw->cap),
mmc_mode2freq(mmc, mwt->mode) / 1000000);
old_voltage = mmc->signal_voltage;
err = mmc_set_lowest_voltage(mmc, mwt->mode,
MMC_ALL_SIGNAL_VOLTAGE);
if (err)
continue;
/* configure the bus width (card + host) */
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
ecbw->ext_csd_bits & ~EXT_CSD_DDR_FLAG);
if (err)
goto error;
mmc_set_bus_width(mmc, bus_width(ecbw->cap));
if (mwt->mode == MMC_HS_400) {
err = mmc_select_hs400(mmc);
if (err) {
printf("Select HS400 failed %d\n", err);
goto error;
}
} else if (mwt->mode == MMC_HS_400_ES) {
err = mmc_select_hs400es(mmc);
if (err) {
printf("Select HS400ES failed %d\n",
err);
goto error;
}
} else {
/* configure the bus speed (card) */
err = mmc_set_card_speed(mmc, mwt->mode, false);
if (err)
goto error;
/*
* configure the bus width AND the ddr mode
* (card). The host side will be taken care
* of in the next step
*/
if (ecbw->ext_csd_bits & EXT_CSD_DDR_FLAG) {
err = mmc_switch(mmc,
EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
ecbw->ext_csd_bits);
if (err)
goto error;
}
/* configure the bus mode (host) */
mmc_select_mode(mmc, mwt->mode);
mmc_set_clock(mmc, mmc->tran_speed,
MMC_CLK_ENABLE);
#ifdef MMC_SUPPORTS_TUNING
/* execute tuning if needed */
if (mwt->tuning) {
err = mmc_execute_tuning(mmc,
mwt->tuning);
if (err) {
pr_debug("tuning failed : %d\n", err);
goto error;
}
}
#endif
}
/* do a transfer to check the configuration */
err = mmc_read_and_compare_ext_csd(mmc);
if (!err)
return 0;
error:
mmc_set_signal_voltage(mmc, old_voltage);
/* if an error occurred, revert to a safer bus mode */
mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_1);
mmc_select_mode(mmc, MMC_LEGACY);
mmc_set_bus_width(mmc, 1);
}
}
pr_err("unable to select a mode : %d\n", err);
return -ENOTSUPP;
}
#endif
#if CONFIG_IS_ENABLED(MMC_TINY)
DEFINE_CACHE_ALIGN_BUFFER(u8, ext_csd_bkup, MMC_MAX_BLOCK_LEN);
#endif
static int mmc_startup_v4(struct mmc *mmc)
{
int err, i;
u64 capacity;
bool has_parts = false;
bool part_completed;
static const u32 mmc_versions[] = {
MMC_VERSION_4,
MMC_VERSION_4_1,
MMC_VERSION_4_2,
MMC_VERSION_4_3,
MMC_VERSION_4_4,
MMC_VERSION_4_41,
MMC_VERSION_4_5,
MMC_VERSION_5_0,
MMC_VERSION_5_1
};
#if CONFIG_IS_ENABLED(MMC_TINY)
u8 *ext_csd = ext_csd_bkup;
if (IS_SD(mmc) || mmc->version < MMC_VERSION_4)
return 0;
if (!mmc->ext_csd)
memset(ext_csd_bkup, 0, sizeof(ext_csd_bkup));
err = mmc_send_ext_csd(mmc, ext_csd);
if (err)
goto error;
/* store the ext csd for future reference */
if (!mmc->ext_csd)
mmc->ext_csd = ext_csd;
#else
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4))
return 0;
/* check ext_csd version and capacity */
err = mmc_send_ext_csd(mmc, ext_csd);
if (err)
goto error;
/* store the ext csd for future reference */
if (!mmc->ext_csd)
mmc->ext_csd = malloc(MMC_MAX_BLOCK_LEN);
if (!mmc->ext_csd)
return -ENOMEM;
memcpy(mmc->ext_csd, ext_csd, MMC_MAX_BLOCK_LEN);
#endif
if (ext_csd[EXT_CSD_REV] >= ARRAY_SIZE(mmc_versions))
return -EINVAL;
mmc->version = mmc_versions[ext_csd[EXT_CSD_REV]];
if (mmc->version >= MMC_VERSION_4_2) {
/*
* According to the JEDEC Standard, the value of
* ext_csd's capacity is valid if the value is more
* than 2GB
*/
capacity = ext_csd[EXT_CSD_SEC_CNT] << 0
| ext_csd[EXT_CSD_SEC_CNT + 1] << 8
| ext_csd[EXT_CSD_SEC_CNT + 2] << 16
| ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
capacity *= MMC_MAX_BLOCK_LEN;
if ((capacity >> 20) > 2 * 1024)
mmc->capacity_user = capacity;
}
if (mmc->version >= MMC_VERSION_4_5)
mmc->gen_cmd6_time = ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
/* The partition data may be non-zero but it is only
* effective if PARTITION_SETTING_COMPLETED is set in
* EXT_CSD, so ignore any data if this bit is not set,
* except for enabling the high-capacity group size
* definition (see below).
*/
part_completed = !!(ext_csd[EXT_CSD_PARTITION_SETTING] &
EXT_CSD_PARTITION_SETTING_COMPLETED);
mmc->part_switch_time = ext_csd[EXT_CSD_PART_SWITCH_TIME];
/* Some eMMC set the value too low so set a minimum */
if (mmc->part_switch_time < MMC_MIN_PART_SWITCH_TIME && mmc->part_switch_time)
mmc->part_switch_time = MMC_MIN_PART_SWITCH_TIME;
/* store the partition info of emmc */
mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT];
if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
ext_csd[EXT_CSD_BOOT_MULT])
mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
if (part_completed &&
(ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT))
mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE];
mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17;
mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17;
for (i = 0; i < 4; i++) {
int idx = EXT_CSD_GP_SIZE_MULT + i * 3;
uint mult = (ext_csd[idx + 2] << 16) +
(ext_csd[idx + 1] << 8) + ext_csd[idx];
if (mult)
has_parts = true;
if (!part_completed)
continue;
mmc->capacity_gp[i] = mult;
mmc->capacity_gp[i] *=
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
mmc->capacity_gp[i] <<= 19;
}
#ifndef CONFIG_SPL_BUILD
if (part_completed) {
mmc->enh_user_size =
(ext_csd[EXT_CSD_ENH_SIZE_MULT + 2] << 16) +
(ext_csd[EXT_CSD_ENH_SIZE_MULT + 1] << 8) +
ext_csd[EXT_CSD_ENH_SIZE_MULT];
mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
mmc->enh_user_size <<= 19;
mmc->enh_user_start =
(ext_csd[EXT_CSD_ENH_START_ADDR + 3] << 24) +
(ext_csd[EXT_CSD_ENH_START_ADDR + 2] << 16) +
(ext_csd[EXT_CSD_ENH_START_ADDR + 1] << 8) +
ext_csd[EXT_CSD_ENH_START_ADDR];
if (mmc->high_capacity)
mmc->enh_user_start <<= 9;
}
#endif
/*
* Host needs to enable ERASE_GRP_DEF bit if device is
* partitioned. This bit will be lost every time after a reset
* or power off. This will affect erase size.
*/
if (part_completed)
has_parts = true;
if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) &&
(ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB))
has_parts = true;
if (has_parts) {
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ERASE_GROUP_DEF, 1);
if (err)
goto error;
ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
}
if (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) {
#if CONFIG_IS_ENABLED(MMC_WRITE)
/* Read out group size from ext_csd */
mmc->erase_grp_size =
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024;
#endif
/*
* if high capacity and partition setting completed
* SEC_COUNT is valid even if it is smaller than 2 GiB
* JEDEC Standard JESD84-B45, 6.2.4
*/
if (mmc->high_capacity && part_completed) {
capacity = (ext_csd[EXT_CSD_SEC_CNT]) |
(ext_csd[EXT_CSD_SEC_CNT + 1] << 8) |
(ext_csd[EXT_CSD_SEC_CNT + 2] << 16) |
(ext_csd[EXT_CSD_SEC_CNT + 3] << 24);
capacity *= MMC_MAX_BLOCK_LEN;
mmc->capacity_user = capacity;
}
}
#if CONFIG_IS_ENABLED(MMC_WRITE)
else {
/* Calculate the group size from the csd value. */
int erase_gsz, erase_gmul;
erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
mmc->erase_grp_size = (erase_gsz + 1)
* (erase_gmul + 1);
}
#endif
#if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING)
mmc->hc_wp_grp_size = 1024
* ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
* ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
#endif
mmc->wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET];
return 0;
error:
if (mmc->ext_csd) {
#if !CONFIG_IS_ENABLED(MMC_TINY)
free(mmc->ext_csd);
#endif
mmc->ext_csd = NULL;
}
return err;
}
static int mmc_startup(struct mmc *mmc)
{
int err, i;
uint mult, freq;
u64 cmult, csize;
struct mmc_cmd cmd;
struct blk_desc *bdesc;
#ifdef CONFIG_MMC_SPI_CRC_ON
if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = 1;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
}
#endif
/* Put the Card in Identify Mode */
cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
cmd.resp_type = MMC_RSP_R2;
cmd.cmdarg = 0;
err = mmc_send_cmd_quirks(mmc, &cmd, NULL, MMC_QUIRK_RETRY_SEND_CID, 4);
if (err)
return err;
memcpy(mmc->cid, cmd.response, 16);
/*
* For MMC cards, set the Relative Address.
* For SD cards, get the Relatvie Address.
* This also puts the cards into Standby State
*/
if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
cmd.cmdarg = mmc->rca << 16;
cmd.resp_type = MMC_RSP_R6;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
if (IS_SD(mmc))
mmc->rca = (cmd.response[0] >> 16) & 0xffff;
}
/* Get the Card-Specific Data */
cmd.cmdidx = MMC_CMD_SEND_CSD;
cmd.resp_type = MMC_RSP_R2;
cmd.cmdarg = mmc->rca << 16;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
mmc->csd[0] = cmd.response[0];
mmc->csd[1] = cmd.response[1];
mmc->csd[2] = cmd.response[2];
mmc->csd[3] = cmd.response[3];
if (mmc->version == MMC_VERSION_UNKNOWN) {
int version = (cmd.response[0] >> 26) & 0xf;
switch (version) {
case 0:
mmc->version = MMC_VERSION_1_2;
break;
case 1:
mmc->version = MMC_VERSION_1_4;
break;
case 2:
mmc->version = MMC_VERSION_2_2;
break;
case 3:
mmc->version = MMC_VERSION_3;
break;
case 4:
mmc->version = MMC_VERSION_4;
break;
default:
mmc->version = MMC_VERSION_1_2;
break;
}
}
/* divide frequency by 10, since the mults are 10x bigger */
freq = fbase[(cmd.response[0] & 0x7)];
mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
mmc->legacy_speed = freq * mult;
mmc_select_mode(mmc, MMC_LEGACY);
mmc->dsr_imp = ((cmd.response[1] >> 12) & 0x1);
mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
#if CONFIG_IS_ENABLED(MMC_WRITE)
if (IS_SD(mmc))
mmc->write_bl_len = mmc->read_bl_len;
else
mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
#endif
if (mmc->high_capacity) {
csize = (mmc->csd[1] & 0x3f) << 16
| (mmc->csd[2] & 0xffff0000) >> 16;
cmult = 8;
} else {
csize = (mmc->csd[1] & 0x3ff) << 2
| (mmc->csd[2] & 0xc0000000) >> 30;
cmult = (mmc->csd[2] & 0x00038000) >> 15;
}
mmc->capacity_user = (csize + 1) << (cmult + 2);
mmc->capacity_user *= mmc->read_bl_len;
mmc->capacity_boot = 0;
mmc->capacity_rpmb = 0;
for (i = 0; i < 4; i++)
mmc->capacity_gp[i] = 0;
if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN)
mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
#if CONFIG_IS_ENABLED(MMC_WRITE)
if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN)
mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
#endif
if ((mmc->dsr_imp) && (0xffffffff != mmc->dsr)) {
cmd.cmdidx = MMC_CMD_SET_DSR;
cmd.cmdarg = (mmc->dsr & 0xffff) << 16;
cmd.resp_type = MMC_RSP_NONE;
if (mmc_send_cmd(mmc, &cmd, NULL))
pr_warn("MMC: SET_DSR failed\n");
}
/* Select the card, and put it into Transfer Mode */
if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
cmd.cmdidx = MMC_CMD_SELECT_CARD;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = mmc->rca << 16;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
}
/*
* For SD, its erase group is always one sector
*/
#if CONFIG_IS_ENABLED(MMC_WRITE)
mmc->erase_grp_size = 1;
#endif
mmc->part_config = MMCPART_NOAVAILABLE;
err = mmc_startup_v4(mmc);
if (err)
return err;
err = mmc_set_capacity(mmc, mmc_get_blk_desc(mmc)->hwpart);
if (err)
return err;
#if CONFIG_IS_ENABLED(MMC_TINY)
mmc_set_clock(mmc, mmc->legacy_speed, false);
mmc_select_mode(mmc, MMC_LEGACY);
mmc_set_bus_width(mmc, 1);
#else
if (IS_SD(mmc)) {
err = sd_get_capabilities(mmc);
if (err)
return err;
err = sd_select_mode_and_width(mmc, mmc->card_caps);
} else {
err = mmc_get_capabilities(mmc);
if (err)
return err;
err = mmc_select_mode_and_width(mmc, mmc->card_caps);
}
#endif
if (err)
return err;
mmc->best_mode = mmc->selected_mode;
/* Fix the block length for DDR mode */
if (mmc->ddr_mode) {
mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
#if CONFIG_IS_ENABLED(MMC_WRITE)
mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
#endif
}
/* fill in device description */
bdesc = mmc_get_blk_desc(mmc);
bdesc->lun = 0;
bdesc->hwpart = 0;
bdesc->type = 0;
bdesc->blksz = mmc->read_bl_len;
bdesc->log2blksz = LOG2(bdesc->blksz);
bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len);
#if !defined(CONFIG_SPL_BUILD) || \
(defined(CONFIG_SPL_LIBCOMMON_SUPPORT) && \
!CONFIG_IS_ENABLED(USE_TINY_PRINTF))
sprintf(bdesc->vendor, "Man %06x Snr %04x%04x",
mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
(mmc->cid[3] >> 16) & 0xffff);
sprintf(bdesc->product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
(mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
(mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
(mmc->cid[2] >> 24) & 0xff);
sprintf(bdesc->revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
(mmc->cid[2] >> 16) & 0xf);
#else
bdesc->vendor[0] = 0;
bdesc->product[0] = 0;
bdesc->revision[0] = 0;
#endif
#if !defined(CONFIG_DM_MMC) && (!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT))
part_init(bdesc);
#endif
return 0;
}
static int mmc_send_if_cond(struct mmc *mmc)
{
struct mmc_cmd cmd;
int err;
cmd.cmdidx = SD_CMD_SEND_IF_COND;
/* We set the bit if the host supports voltages between 2.7 and 3.6 V */
cmd.cmdarg = ((mmc->cfg->voltages & 0xff8000) != 0) << 8 | 0xaa;
cmd.resp_type = MMC_RSP_R7;
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
return err;
if ((cmd.response[0] & 0xff) != 0xaa)
return -EOPNOTSUPP;
else
mmc->version = SD_VERSION_2;
return 0;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
/* board-specific MMC power initializations. */
__weak void board_mmc_power_init(void)
{
}
#endif
static int mmc_power_init(struct mmc *mmc)
{
#if CONFIG_IS_ENABLED(DM_MMC)
#if CONFIG_IS_ENABLED(DM_REGULATOR)
int ret;
ret = device_get_supply_regulator(mmc->dev, "vmmc-supply",
&mmc->vmmc_supply);
if (ret)
pr_debug("%s: No vmmc supply\n", mmc->dev->name);
ret = device_get_supply_regulator(mmc->dev, "vqmmc-supply",
&mmc->vqmmc_supply);
if (ret)
pr_debug("%s: No vqmmc supply\n", mmc->dev->name);
#endif
#else /* !CONFIG_DM_MMC */
/*
* Driver model should use a regulator, as above, rather than calling
* out to board code.
*/
board_mmc_power_init();
#endif
return 0;
}
/*
* put the host in the initial state:
* - turn on Vdd (card power supply)
* - configure the bus width and clock to minimal values
*/
static void mmc_set_initial_state(struct mmc *mmc)
{
int err;
/* First try to set 3.3V. If it fails set to 1.8V */
err = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_330);
if (err != 0)
err = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_180);
if (err != 0)
pr_warn("mmc: failed to set signal voltage\n");
mmc_select_mode(mmc, MMC_LEGACY);
mmc_set_bus_width(mmc, 1);
mmc_set_clock(mmc, 0, MMC_CLK_ENABLE);
}
static int mmc_power_on(struct mmc *mmc)
{
#if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR)
if (mmc->vmmc_supply) {
int ret = regulator_set_enable(mmc->vmmc_supply, true);
if (ret && ret != -EACCES) {
printf("Error enabling VMMC supply : %d\n", ret);
return ret;
}
}
#endif
return 0;
}
static int mmc_power_off(struct mmc *mmc)
{
mmc_set_clock(mmc, 0, MMC_CLK_DISABLE);
#if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR)
if (mmc->vmmc_supply) {
int ret = regulator_set_enable(mmc->vmmc_supply, false);
if (ret && ret != -EACCES) {
pr_debug("Error disabling VMMC supply : %d\n", ret);
return ret;
}
}
#endif
return 0;
}
static int mmc_power_cycle(struct mmc *mmc)
{
int ret;
ret = mmc_power_off(mmc);
if (ret)
return ret;
ret = mmc_host_power_cycle(mmc);
if (ret)
return ret;
/*
* SD spec recommends at least 1ms of delay. Let's wait for 2ms
* to be on the safer side.
*/
udelay(2000);
return mmc_power_on(mmc);
}
int mmc_get_op_cond(struct mmc *mmc)
{
bool uhs_en = supports_uhs(mmc->cfg->host_caps);
int err;
if (mmc->has_init)
return 0;
err = mmc_power_init(mmc);
if (err)
return err;
#ifdef CONFIG_MMC_QUIRKS
mmc->quirks = MMC_QUIRK_RETRY_SET_BLOCKLEN |
MMC_QUIRK_RETRY_SEND_CID |
MMC_QUIRK_RETRY_APP_CMD;
#endif
err = mmc_power_cycle(mmc);
if (err) {
/*
* if power cycling is not supported, we should not try
* to use the UHS modes, because we wouldn't be able to
* recover from an error during the UHS initialization.
*/
pr_debug("Unable to do a full power cycle. Disabling the UHS modes for safety\n");
uhs_en = false;
mmc->host_caps &= ~UHS_CAPS;
err = mmc_power_on(mmc);
}
if (err)
return err;
#if CONFIG_IS_ENABLED(DM_MMC)
/*
* Re-initialization is needed to clear old configuration for
* mmc rescan.
*/
err = mmc_reinit(mmc);
#else
/* made sure it's not NULL earlier */
err = mmc->cfg->ops->init(mmc);
#endif
if (err)
return err;
mmc->ddr_mode = 0;
retry:
mmc_set_initial_state(mmc);
/* Reset the Card */
err = mmc_go_idle(mmc);
if (err)
return err;
/* The internal partition reset to user partition(0) at every CMD0 */
mmc_get_blk_desc(mmc)->hwpart = 0;
/* Test for SD version 2 */
err = mmc_send_if_cond(mmc);
/* Now try to get the SD card's operating condition */
err = sd_send_op_cond(mmc, uhs_en);
if (err && uhs_en) {
uhs_en = false;
mmc_power_cycle(mmc);
goto retry;
}
/* If the command timed out, we check for an MMC card */
if (err == -ETIMEDOUT) {
err = mmc_send_op_cond(mmc);
if (err) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
pr_err("Card did not respond to voltage select! : %d\n", err);
#endif
return -EOPNOTSUPP;
}
}
return err;
}
int mmc_start_init(struct mmc *mmc)
{
bool no_card;
int err = 0;
/*
* all hosts are capable of 1 bit bus-width and able to use the legacy
* timings.
*/
mmc->host_caps = mmc->cfg->host_caps | MMC_CAP(MMC_LEGACY) |
MMC_CAP(MMC_LEGACY) | MMC_MODE_1BIT;
#if CONFIG_IS_ENABLED(DM_MMC)
mmc_deferred_probe(mmc);
#endif
#if !defined(CONFIG_MMC_BROKEN_CD)
no_card = mmc_getcd(mmc) == 0;
#else
no_card = 0;
#endif
#if !CONFIG_IS_ENABLED(DM_MMC)
/* we pretend there's no card when init is NULL */
no_card = no_card || (mmc->cfg->ops->init == NULL);
#endif
if (no_card) {
mmc->has_init = 0;
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
pr_err("MMC: no card present\n");
#endif
return -ENOMEDIUM;
}
err = mmc_get_op_cond(mmc);
if (!err)
mmc->init_in_progress = 1;
return err;
}
static int mmc_complete_init(struct mmc *mmc)
{
int err = 0;
mmc->init_in_progress = 0;
if (mmc->op_cond_pending)
err = mmc_complete_op_cond(mmc);
if (!err)
err = mmc_startup(mmc);
if (err)
mmc->has_init = 0;
else
mmc->has_init = 1;
return err;
}
int mmc_init(struct mmc *mmc)
{
int err = 0;
__maybe_unused ulong start;
#if CONFIG_IS_ENABLED(DM_MMC)
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(mmc->dev);
upriv->mmc = mmc;
#endif
if (mmc->has_init)
return 0;
start = get_timer(0);
if (!mmc->init_in_progress)
err = mmc_start_init(mmc);
if (!err)
err = mmc_complete_init(mmc);
if (err)
pr_info("%s: %d, time %lu\n", __func__, err, get_timer(start));
return err;
}
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
int mmc_deinit(struct mmc *mmc)
{
u32 caps_filtered;
if (!mmc->has_init)
return 0;
if (IS_SD(mmc)) {
caps_filtered = mmc->card_caps &
~(MMC_CAP(UHS_SDR12) | MMC_CAP(UHS_SDR25) |
MMC_CAP(UHS_SDR50) | MMC_CAP(UHS_DDR50) |
MMC_CAP(UHS_SDR104));
return sd_select_mode_and_width(mmc, caps_filtered);
} else {
caps_filtered = mmc->card_caps &
~(MMC_CAP(MMC_HS_200) | MMC_CAP(MMC_HS_400));
return mmc_select_mode_and_width(mmc, caps_filtered);
}
}
#endif
int mmc_set_dsr(struct mmc *mmc, u16 val)
{
mmc->dsr = val;
return 0;
}
/* CPU-specific MMC initializations */
__weak int cpu_mmc_init(struct bd_info *bis)
{
return -1;
}
/* board-specific MMC initializations. */
__weak int board_mmc_init(struct bd_info *bis)
{
return -1;
}
void mmc_set_preinit(struct mmc *mmc, int preinit)
{
mmc->preinit = preinit;
}
#if CONFIG_IS_ENABLED(DM_MMC)
static int mmc_probe(struct bd_info *bis)
{
int ret, i;
struct uclass *uc;
struct udevice *dev;
ret = uclass_get(UCLASS_MMC, &uc);
if (ret)
return ret;
/*
* Try to add them in sequence order. Really with driver model we
* should allow holes, but the current MMC list does not allow that.
* So if we request 0, 1, 3 we will get 0, 1, 2.
*/
for (i = 0; ; i++) {
ret = uclass_get_device_by_seq(UCLASS_MMC, i, &dev);
if (ret == -ENODEV)
break;
}
uclass_foreach_dev(dev, uc) {
ret = device_probe(dev);
if (ret)
pr_err("%s - probe failed: %d\n", dev->name, ret);
}
return 0;
}
#else
static int mmc_probe(struct bd_info *bis)
{
if (board_mmc_init(bis) < 0)
cpu_mmc_init(bis);
return 0;
}
#endif
int mmc_initialize(struct bd_info *bis)
{
static int initialized = 0;
int ret;
if (initialized) /* Avoid initializing mmc multiple times */
return 0;
initialized = 1;
#if !CONFIG_IS_ENABLED(BLK)
#if !CONFIG_IS_ENABLED(MMC_TINY)
mmc_list_init();
#endif
#endif
ret = mmc_probe(bis);
if (ret)
return ret;
#ifndef CONFIG_SPL_BUILD
print_mmc_devices(',');
#endif
mmc_do_preinit();
return 0;
}
#if CONFIG_IS_ENABLED(DM_MMC)
int mmc_init_device(int num)
{
struct udevice *dev;
struct mmc *m;
int ret;
if (uclass_get_device_by_seq(UCLASS_MMC, num, &dev)) {
ret = uclass_get_device(UCLASS_MMC, num, &dev);
if (ret)
return ret;
}
m = mmc_get_mmc_dev(dev);
if (!m)
return 0;
if (m->preinit)
mmc_start_init(m);
return 0;
}
#endif
#ifdef CONFIG_CMD_BKOPS_ENABLE
int mmc_set_bkops_enable(struct mmc *mmc)
{
int err;
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
err = mmc_send_ext_csd(mmc, ext_csd);
if (err) {
puts("Could not get ext_csd register values\n");
return err;
}
if (!(ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1)) {
puts("Background operations not supported on device\n");
return -EMEDIUMTYPE;
}
if (ext_csd[EXT_CSD_BKOPS_EN] & 0x1) {
puts("Background operations already enabled\n");
return 0;
}
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BKOPS_EN, 1);
if (err) {
puts("Failed to enable manual background operations\n");
return err;
}
puts("Enabled manual background operations\n");
return 0;
}
#endif
__weak int mmc_get_env_dev(void)
{
#ifdef CONFIG_SYS_MMC_ENV_DEV
return CONFIG_SYS_MMC_ENV_DEV;
#else
return 0;
#endif
}
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