Newer
Older
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2011, Marvell Semiconductor Inc.
* Lei Wen <leiwen@marvell.com>
*
* Back ported to the 8xx platform (from the 8260 platform) by
* Murray.Jensen@cmst.csiro.au, 27-Jan-01.
*/
#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <mmc.h>
#include <sdhci.h>
#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
void *aligned_buffer = (void *)CONFIG_FIXED_SDHCI_ALIGNED_BUFFER;
#else
#endif
static void sdhci_reset(struct sdhci_host *host, u8 mask)
{
unsigned long timeout;
/* Wait max 100 ms */
timeout = 100;
sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
if (timeout == 0) {
printf("%s: Reset 0x%x never completed.\n",
__func__, (int)mask);
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
return;
}
timeout--;
udelay(1000);
}
}
static void sdhci_cmd_done(struct sdhci_host *host, struct mmc_cmd *cmd)
{
int i;
if (cmd->resp_type & MMC_RSP_136) {
/* CRC is stripped so we need to do some shifting. */
for (i = 0; i < 4; i++) {
cmd->response[i] = sdhci_readl(host,
SDHCI_RESPONSE + (3-i)*4) << 8;
if (i != 3)
cmd->response[i] |= sdhci_readb(host,
SDHCI_RESPONSE + (3-i)*4-1);
}
} else {
cmd->response[0] = sdhci_readl(host, SDHCI_RESPONSE);
}
}
static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
{
int i;
char *offs;
for (i = 0; i < data->blocksize; i += 4) {
offs = data->dest + i;
if (data->flags == MMC_DATA_READ)
*(u32 *)offs = sdhci_readl(host, SDHCI_BUFFER);
else
sdhci_writel(host, *(u32 *)offs, SDHCI_BUFFER);
}
}
static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
unsigned int start_addr)
{
unsigned int stat, rdy, mask, timeout, block = 0;
bool transfer_done = false;
#ifdef CONFIG_MMC_SDHCI_SDMA
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
timeout = 1000000;
rdy = SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_AVAIL;
mask = SDHCI_DATA_AVAILABLE | SDHCI_SPACE_AVAILABLE;
do {
stat = sdhci_readl(host, SDHCI_INT_STATUS);
if (stat & SDHCI_INT_ERROR) {
pr_debug("%s: Error detected in status(0x%X)!\n",
__func__, stat);
if (!transfer_done && (stat & rdy)) {
if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & mask))
continue;
sdhci_writel(host, rdy, SDHCI_INT_STATUS);
sdhci_transfer_pio(host, data);
data->dest += data->blocksize;
if (++block >= data->blocks) {
/* Keep looping until the SDHCI_INT_DATA_END is
* cleared, even if we finished sending all the
* blocks.
*/
transfer_done = true;
continue;
}
#ifdef CONFIG_MMC_SDHCI_SDMA
if (!transfer_done && (stat & SDHCI_INT_DMA_END)) {
sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS);
start_addr &= ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1);
start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE;
sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
}
#endif
if (timeout-- > 0)
udelay(10);
else {
printf("%s: Transfer data timeout\n", __func__);
} while (!(stat & SDHCI_INT_DATA_END));
return 0;
}
/*
* No command will be sent by driver if card is busy, so driver must wait
* for card ready state.
* Every time when card is busy after timeout then (last) timeout value will be
* increased twice but only if it doesn't exceed global defined maximum.
* Each function call will use last timeout value.
#define SDHCI_CMD_MAX_TIMEOUT 3200
#define SDHCI_CMD_DEFAULT_TIMEOUT 100
#define SDHCI_READ_STATUS_TIMEOUT 1000
static int sdhci_send_command(struct udevice *dev, struct mmc_cmd *cmd,
struct mmc_data *data)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
#else
static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
struct sdhci_host *host = mmc->priv;
unsigned int stat = 0;
int ret = 0;
int trans_bytes = 0, is_aligned = 1;
u32 mask, flags, mode;
unsigned int time = 0, start_addr = 0;
int mmc_dev = mmc_get_blk_desc(mmc)->devnum;
ulong start = get_timer(0);
/* Timeout unit - ms */
static unsigned int cmd_timeout = SDHCI_CMD_DEFAULT_TIMEOUT;
mask = SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT;
/* We shouldn't wait for data inihibit for stop commands, even
though they might use busy signaling */
Siva Durga Prasad Paladugu
committed
if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION ||
cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK ||
cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200)
mask &= ~SDHCI_DATA_INHIBIT;
while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
if (time >= cmd_timeout) {
printf("%s: MMC: %d busy ", __func__, mmc_dev);
if (2 * cmd_timeout <= SDHCI_CMD_MAX_TIMEOUT) {
cmd_timeout += cmd_timeout;
printf("timeout increasing to: %u ms.\n",
cmd_timeout);
} else {
puts("timeout.\n");
time++;
sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
if (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK ||
cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200)
Siva Durga Prasad Paladugu
committed
mask = SDHCI_INT_DATA_AVAIL;
if (!(cmd->resp_type & MMC_RSP_PRESENT))
flags = SDHCI_CMD_RESP_NONE;
else if (cmd->resp_type & MMC_RSP_136)
flags = SDHCI_CMD_RESP_LONG;
else if (cmd->resp_type & MMC_RSP_BUSY) {
flags = SDHCI_CMD_RESP_SHORT_BUSY;
if (data)
mask |= SDHCI_INT_DATA_END;
} else
flags = SDHCI_CMD_RESP_SHORT;
if (cmd->resp_type & MMC_RSP_CRC)
flags |= SDHCI_CMD_CRC;
if (cmd->resp_type & MMC_RSP_OPCODE)
flags |= SDHCI_CMD_INDEX;
if (data || cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK ||
cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200)
/* Set Transfer mode regarding to data flag */
sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
mode = SDHCI_TRNS_BLK_CNT_EN;
trans_bytes = data->blocks * data->blocksize;
if (data->blocks > 1)
mode |= SDHCI_TRNS_MULTI;
if (data->flags == MMC_DATA_READ)
mode |= SDHCI_TRNS_READ;
#ifdef CONFIG_MMC_SDHCI_SDMA
start_addr = (unsigned long)data->dest;
start_addr = (unsigned long)data->src;
if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
(start_addr & 0x7) != 0x0) {
is_aligned = 0;
start_addr = (unsigned long)aligned_buffer;
if (data->flags != MMC_DATA_READ)
memcpy(aligned_buffer, data->src, trans_bytes);
}
#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
/*
* Always use this bounce-buffer when
* CONFIG_FIXED_SDHCI_ALIGNED_BUFFER is defined
*/
is_aligned = 0;
start_addr = (unsigned long)aligned_buffer;
if (data->flags != MMC_DATA_READ)
memcpy(aligned_buffer, data->src, trans_bytes);
#endif
sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
mode |= SDHCI_TRNS_DMA;
#endif
sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
data->blocksize),
SDHCI_BLOCK_SIZE);
sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
} else if (cmd->resp_type & MMC_RSP_BUSY) {
sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
}
sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT);
#ifdef CONFIG_MMC_SDHCI_SDMA
trans_bytes = ALIGN(trans_bytes, CONFIG_SYS_CACHELINE_SIZE);
flush_cache(start_addr, trans_bytes);
}
#endif
sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND);
start = get_timer(0);
do {
stat = sdhci_readl(host, SDHCI_INT_STATUS);
if (stat & SDHCI_INT_ERROR)
break;
if (get_timer(start) >= SDHCI_READ_STATUS_TIMEOUT) {
if (host->quirks & SDHCI_QUIRK_BROKEN_R1B) {
return 0;
} else {
printf("%s: Timeout for status update!\n",
__func__);
} while ((stat & mask) != mask);
if ((stat & (SDHCI_INT_ERROR | mask)) == mask) {
sdhci_cmd_done(host, cmd);
sdhci_writel(host, mask, SDHCI_INT_STATUS);
} else
ret = -1;
if (!ret && data)
ret = sdhci_transfer_data(host, data, start_addr);
if (host->quirks & SDHCI_QUIRK_WAIT_SEND_CMD)
udelay(1000);
stat = sdhci_readl(host, SDHCI_INT_STATUS);
sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
if (!ret) {
if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
!is_aligned && (data->flags == MMC_DATA_READ))
memcpy(data->dest, aligned_buffer, trans_bytes);
return 0;
}
sdhci_reset(host, SDHCI_RESET_CMD);
sdhci_reset(host, SDHCI_RESET_DATA);
if (stat & SDHCI_INT_TIMEOUT)
#if defined(CONFIG_DM_MMC) && defined(MMC_SUPPORTS_TUNING)
static int sdhci_execute_tuning(struct udevice *dev, uint opcode)
{
int err;
struct mmc *mmc = mmc_get_mmc_dev(dev);
struct sdhci_host *host = mmc->priv;
debug("%s\n", __func__);
if (host->ops && host->ops->platform_execute_tuning) {
err = host->ops->platform_execute_tuning(mmc, opcode);
if (err)
return err;
return 0;
}
return 0;
}
#endif
static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
{
struct sdhci_host *host = mmc->priv;
unsigned int div, clk = 0, timeout;
/* Wait max 20 ms */
timeout = 200;
while (sdhci_readl(host, SDHCI_PRESENT_STATE) &
(SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
if (timeout == 0) {
printf("%s: Timeout to wait cmd & data inhibit\n",
__func__);
}
timeout--;
udelay(100);
}
sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
if (host->ops && host->ops->set_delay)
host->ops->set_delay(host);
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
/*
* Check if the Host Controller supports Programmable Clock
* Mode.
*/
if (host->clk_mul) {
for (div = 1; div <= 1024; div++) {
if ((host->max_clk / div) <= clock)
/*
* Set Programmable Clock Mode in the Clock
* Control register.
*/
clk = SDHCI_PROG_CLOCK_MODE;
div--;
} else {
/* Version 3.00 divisors must be a multiple of 2. */
Stefan Herbrechtsmeier
committed
if (host->max_clk <= clock) {
div = 1;
} else {
for (div = 2;
div < SDHCI_MAX_DIV_SPEC_300;
div += 2) {
Stefan Herbrechtsmeier
committed
if ((host->max_clk / div) <= clock)
break;
}
}
div >>= 1;
}
} else {
/* Version 2.00 divisors must be a power of 2. */
for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
Stefan Herbrechtsmeier
committed
if ((host->max_clk / div) <= clock)
if (host->ops && host->ops->set_clock)
host->ops->set_clock(host, div);
clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
<< SDHCI_DIVIDER_HI_SHIFT;
clk |= SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
/* Wait max 20 ms */
timeout = 20;
while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
& SDHCI_CLOCK_INT_STABLE)) {
if (timeout == 0) {
printf("%s: Internal clock never stabilised.\n",
__func__);
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
}
timeout--;
udelay(1000);
}
clk |= SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
return 0;
}
static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
{
u8 pwr = 0;
if (power != (unsigned short)-1) {
switch (1 << power) {
case MMC_VDD_165_195:
pwr = SDHCI_POWER_180;
break;
case MMC_VDD_29_30:
case MMC_VDD_30_31:
pwr = SDHCI_POWER_300;
break;
case MMC_VDD_32_33:
case MMC_VDD_33_34:
pwr = SDHCI_POWER_330;
break;
}
}
if (pwr == 0) {
sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
return;
}
pwr |= SDHCI_POWER_ON;
sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
}
static int sdhci_set_ios(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
#else
static int sdhci_set_ios(struct mmc *mmc)
struct sdhci_host *host = mmc->priv;
if (host->ops && host->ops->set_control_reg)
host->ops->set_control_reg(host);
if (mmc->clock != host->clock)
sdhci_set_clock(mmc, mmc->clock);
if (mmc->clk_disable)
sdhci_set_clock(mmc, 0);
/* Set bus width */
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
if (mmc->bus_width == 8) {
ctrl &= ~SDHCI_CTRL_4BITBUS;
if ((SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) ||
(host->quirks & SDHCI_QUIRK_USE_WIDE8))
if ((SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) ||
(host->quirks & SDHCI_QUIRK_USE_WIDE8))
ctrl &= ~SDHCI_CTRL_8BITBUS;
if (mmc->bus_width == 4)
ctrl |= SDHCI_CTRL_4BITBUS;
else
ctrl &= ~SDHCI_CTRL_4BITBUS;
}
if (mmc->clock > 26000000)
ctrl |= SDHCI_CTRL_HISPD;
else
ctrl &= ~SDHCI_CTRL_HISPD;
if ((host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) ||
(host->quirks & SDHCI_QUIRK_BROKEN_HISPD_MODE))
ctrl &= ~SDHCI_CTRL_HISPD;
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
/* If available, call the driver specific "post" set_ios() function */
if (host->ops && host->ops->set_ios_post)
host->ops->set_ios_post(host);
static int sdhci_init(struct mmc *mmc)
struct sdhci_host *host = mmc->priv;
sdhci_reset(host, SDHCI_RESET_ALL);
if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && !aligned_buffer) {
aligned_buffer = memalign(8, 512*1024);
if (!aligned_buffer) {
printf("%s: Aligned buffer alloc failed!!!\n",
__func__);
sdhci_set_power(host, fls(mmc->cfg->voltages) - 1);
if (host->ops && host->ops->get_cd)
/* Enable only interrupts served by the SD controller */
sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK,
SDHCI_INT_ENABLE);
/* Mask all sdhci interrupt sources */
sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);
int sdhci_probe(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
return sdhci_init(mmc);
}
const struct dm_mmc_ops sdhci_ops = {
.send_cmd = sdhci_send_command,
.set_ios = sdhci_set_ios,
#ifdef MMC_SUPPORTS_TUNING
.execute_tuning = sdhci_execute_tuning,
#endif
static const struct mmc_ops sdhci_ops = {
.send_cmd = sdhci_send_command,
.set_ios = sdhci_set_ios,
.init = sdhci_init,
};
int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
Stefan Herbrechtsmeier
committed
u32 f_max, u32 f_min)
u32 caps, caps_1 = 0;
caps = sdhci_readl(host, SDHCI_CAPABILITIES);
#ifdef CONFIG_MMC_SDHCI_SDMA
if (!(caps & SDHCI_CAN_DO_SDMA)) {
printf("%s: Your controller doesn't support SDMA!!\n",
__func__);
return -EINVAL;
}
#endif
if (host->quirks & SDHCI_QUIRK_REG32_RW)
host->version =
sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
else
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
cfg->name = host->name;
cfg->ops = &sdhci_ops;
/* Check whether the clock multiplier is supported or not */
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
host->clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >>
SDHCI_CLOCK_MUL_SHIFT;
}
Stefan Herbrechtsmeier
committed
if (host->max_clk == 0) {
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
Stefan Herbrechtsmeier
committed
host->max_clk = (caps & SDHCI_CLOCK_V3_BASE_MASK) >>
SDHCI_CLOCK_BASE_SHIFT;
Stefan Herbrechtsmeier
committed
host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK) >>
SDHCI_CLOCK_BASE_SHIFT;
Stefan Herbrechtsmeier
committed
host->max_clk *= 1000000;
if (host->clk_mul)
host->max_clk *= host->clk_mul;
Stefan Herbrechtsmeier
committed
if (host->max_clk == 0) {
printf("%s: Hardware doesn't specify base clock frequency\n",
__func__);
return -EINVAL;
Stefan Herbrechtsmeier
committed
if (f_max && (f_max < host->max_clk))
cfg->f_max = f_max;
else
cfg->f_max = host->max_clk;
if (f_min)
cfg->f_min = f_min;
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
cfg->f_min = cfg->f_max / SDHCI_MAX_DIV_SPEC_300;
cfg->f_min = cfg->f_max / SDHCI_MAX_DIV_SPEC_200;
cfg->voltages = 0;
cfg->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
cfg->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
cfg->voltages |= MMC_VDD_165_195;
if (host->quirks & SDHCI_QUIRK_BROKEN_VOLTAGE)
cfg->voltages |= host->voltages;
cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT;
/* Since Host Controller Version3.0 */
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
if (!(caps & SDHCI_CAN_DO_8BIT))
cfg->host_caps &= ~MMC_MODE_8BIT;
if (host->quirks & SDHCI_QUIRK_BROKEN_HISPD_MODE) {
cfg->host_caps &= ~MMC_MODE_HS;
cfg->host_caps &= ~MMC_MODE_HS_52MHz;
}
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
if (!(cfg->voltages & MMC_VDD_165_195) ||
(host->quirks & SDHCI_QUIRK_NO_1_8_V))
caps_1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
SDHCI_SUPPORT_DDR50);
if (caps_1 & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
SDHCI_SUPPORT_DDR50))
cfg->host_caps |= MMC_CAP(UHS_SDR12) | MMC_CAP(UHS_SDR25);
if (caps_1 & SDHCI_SUPPORT_SDR104) {
cfg->host_caps |= MMC_CAP(UHS_SDR104) | MMC_CAP(UHS_SDR50);
/*
* SD3.0: SDR104 is supported so (for eMMC) the caps2
* field can be promoted to support HS200.
*/
cfg->host_caps |= MMC_CAP(MMC_HS_200);
} else if (caps_1 & SDHCI_SUPPORT_SDR50) {
cfg->host_caps |= MMC_CAP(UHS_SDR50);
}
if (caps_1 & SDHCI_SUPPORT_DDR50)
cfg->host_caps |= MMC_CAP(UHS_DDR50);
if (host->host_caps)
cfg->host_caps |= host->host_caps;
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
return 0;
}
#ifdef CONFIG_BLK
int sdhci_bind(struct udevice *dev, struct mmc *mmc, struct mmc_config *cfg)
{
return mmc_bind(dev, mmc, cfg);
}
#else
Stefan Herbrechtsmeier
committed
int add_sdhci(struct sdhci_host *host, u32 f_max, u32 f_min)
Stefan Herbrechtsmeier
committed
ret = sdhci_setup_cfg(&host->cfg, host, f_max, f_min);
if (ret)
return ret;
host->mmc = mmc_create(&host->cfg, host);
if (host->mmc == NULL) {
printf("%s: mmc create fail!\n", __func__);