/*
* Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <common/debug.h>
#include <lib/mmio.h>
#include "emmc_config.h"
#include "emmc_hal.h"
#include "emmc_std.h"
#include "emmc_registers.h"
#include "emmc_def.h"
#include "micro_delay.h"
#include "rcar_def.h"
static EMMC_ERROR_CODE emmc_clock_ctrl(uint8_t mode);
static EMMC_ERROR_CODE emmc_card_init(void);
static EMMC_ERROR_CODE emmc_high_speed(void);
static EMMC_ERROR_CODE emmc_bus_width(uint32_t width);
static uint32_t emmc_set_timeout_register_value(uint32_t freq);
static void set_sd_clk(uint32_t clkDiv);
static uint32_t emmc_calc_tran_speed(uint32_t *freq);
static void emmc_get_partition_access(void);
static void emmc_set_bootpartition(void);
static void emmc_set_bootpartition(void)
{
uint32_t reg;
reg = mmio_read_32(RCAR_PRR) & (RCAR_PRODUCT_MASK | RCAR_CUT_MASK);
if (reg == RCAR_PRODUCT_M3_CUT10) {
mmc_drv_obj.boot_partition_en =
(EMMC_PARTITION_ID) ((mmc_drv_obj.ext_csd_data[179] &
EMMC_BOOT_PARTITION_EN_MASK) >>
EMMC_BOOT_PARTITION_EN_SHIFT);
} else if ((reg == RCAR_PRODUCT_H3_CUT20)
|| (reg == RCAR_PRODUCT_M3_CUT11)) {
mmc_drv_obj.boot_partition_en = mmc_drv_obj.partition_access;
} else {
if ((mmio_read_32(MFISBTSTSR) & MFISBTSTSR_BOOT_PARTITION) !=
0U) {
mmc_drv_obj.boot_partition_en = PARTITION_ID_BOOT_2;
} else {
mmc_drv_obj.boot_partition_en = PARTITION_ID_BOOT_1;
}
}
}
static EMMC_ERROR_CODE emmc_card_init(void)
{
int32_t retry;
uint32_t freq = MMC_400KHZ; /* 390KHz */
EMMC_ERROR_CODE result;
uint32_t resultCalc;
/* state check */
if ((mmc_drv_obj.initialize != TRUE)
|| (mmc_drv_obj.card_power_enable != TRUE)
|| ((GETR_32(SD_INFO2) & SD_INFO2_CBSY) != 0)
) {
emmc_write_error_info(EMMC_FUNCNO_CARD_INIT, EMMC_ERR_STATE);
return EMMC_ERR_STATE;
}
/* clock on (force change) */
mmc_drv_obj.current_freq = 0;
mmc_drv_obj.max_freq = MMC_20MHZ;
result = emmc_set_request_mmc_clock(&freq);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return EMMC_ERR;
}
rcar_micro_delay(1000U); /* wait 1ms */
/* Get current access partition */
emmc_get_partition_access();
/* CMD0, arg=0x00000000 */
result = emmc_send_idle_cmd(0x00000000);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
rcar_micro_delay(200U); /* wait 74clock 390kHz(189.74us) */
/* CMD1 */
emmc_make_nontrans_cmd(CMD1_SEND_OP_COND, EMMC_HOST_OCR_VALUE);
for (retry = 300; retry > 0; retry--) {
result =
emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
if ((mmc_drv_obj.r3_ocr & EMMC_OCR_STATUS_BIT) != 0) {
break; /* card is ready. exit loop */
}
rcar_micro_delay(1000U); /* wait 1ms */
}
if (retry == 0) {
emmc_write_error_info(EMMC_FUNCNO_CARD_INIT, EMMC_ERR_TIMEOUT);
return EMMC_ERR_TIMEOUT;
}
switch (mmc_drv_obj.r3_ocr & EMMC_OCR_ACCESS_MODE_MASK) {
case EMMC_OCR_ACCESS_MODE_SECT:
mmc_drv_obj.access_mode = TRUE; /* sector mode */
break;
default:
/* unknown value */
emmc_write_error_info(EMMC_FUNCNO_CARD_INIT, EMMC_ERR);
return EMMC_ERR;
}
/* CMD2 */
emmc_make_nontrans_cmd(CMD2_ALL_SEND_CID_MMC, 0x00000000);
mmc_drv_obj.response = (uint32_t *) (&mmc_drv_obj.cid_data[0]); /* use CID special buffer */
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
/* CMD3 */
emmc_make_nontrans_cmd(CMD3_SET_RELATIVE_ADDR, EMMC_RCA << 16);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
/* CMD9 (CSD) */
emmc_make_nontrans_cmd(CMD9_SEND_CSD, EMMC_RCA << 16);
mmc_drv_obj.response = (uint32_t *) (&mmc_drv_obj.csd_data[0]); /* use CSD special buffer */
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
/* card version check */
if (EMMC_CSD_SPEC_VARS() < 4) {
emmc_write_error_info(EMMC_FUNCNO_CARD_INIT,
EMMC_ERR_ILLEGAL_CARD);
return EMMC_ERR_ILLEGAL_CARD;
}
/* CMD7 (select card) */
emmc_make_nontrans_cmd(CMD7_SELECT_CARD, EMMC_RCA << 16);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
mmc_drv_obj.selected = TRUE;
/* card speed check */
resultCalc = emmc_calc_tran_speed(&freq); /* Card spec is calculated from TRAN_SPEED(CSD). */
if (resultCalc == 0) {
emmc_write_error_info(EMMC_FUNCNO_CARD_INIT,
EMMC_ERR_ILLEGAL_CARD);
return EMMC_ERR_ILLEGAL_CARD;
}
mmc_drv_obj.max_freq = freq; /* max frequency (card spec) */
result = emmc_set_request_mmc_clock(&freq);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return EMMC_ERR;
}
/* set read/write timeout */
mmc_drv_obj.data_timeout = emmc_set_timeout_register_value(freq);
SETR_32(SD_OPTION,
((GETR_32(SD_OPTION) & ~(SD_OPTION_TIMEOUT_CNT_MASK)) |
mmc_drv_obj.data_timeout));
/* SET_BLOCKLEN(512byte) */
/* CMD16 */
emmc_make_nontrans_cmd(CMD16_SET_BLOCKLEN, EMMC_BLOCK_LENGTH);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
/* Transfer Data Length */
SETR_32(SD_SIZE, EMMC_BLOCK_LENGTH);
/* CMD8 (EXT_CSD) */
emmc_make_trans_cmd(CMD8_SEND_EXT_CSD, 0x00000000,
(uint32_t *) (&mmc_drv_obj.ext_csd_data[0]),
EMMC_MAX_EXT_CSD_LENGTH, HAL_MEMCARD_READ,
HAL_MEMCARD_NOT_DMA);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
/* CMD12 is not send.
* If BUS initialization is failed, user must be execute Bus initialization again.
* Bus initialization is start CMD0(soft reset command).
*/
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
return result;
}
/* Set boot partition */
emmc_set_bootpartition();
return EMMC_SUCCESS;
}
static EMMC_ERROR_CODE emmc_high_speed(void)
{
uint32_t freq; /**< High speed mode clock frequency */
EMMC_ERROR_CODE result;
uint8_t cardType;
/* state check */
if (mmc_drv_obj.selected != TRUE) {
emmc_write_error_info(EMMC_FUNCNO_HIGH_SPEED, EMMC_ERR_STATE);
return EMMC_ERR_STATE;
}
/* max frequency */
cardType = (uint8_t) mmc_drv_obj.ext_csd_data[EMMC_EXT_CSD_CARD_TYPE];
if ((cardType & EMMC_EXT_CSD_CARD_TYPE_52MHZ) != 0)
freq = MMC_52MHZ;
else if ((cardType & EMMC_EXT_CSD_CARD_TYPE_26MHZ) != 0)
freq = MMC_26MHZ;
else
freq = MMC_20MHZ;
/* Hi-Speed-mode selction */
if ((MMC_52MHZ == freq) || (MMC_26MHZ == freq)) {
/* CMD6 */
emmc_make_nontrans_cmd(CMD6_SWITCH, EMMC_SWITCH_HS_TIMING);
result =
emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_HIGH_SPEED);
return result;
}
mmc_drv_obj.hs_timing = TIMING_HIGH_SPEED; /* High-Speed */
}
/* set mmc clock */
mmc_drv_obj.max_freq = freq;
result = emmc_set_request_mmc_clock(&freq);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_HIGH_SPEED);
return EMMC_ERR;
}
/* set read/write timeout */
mmc_drv_obj.data_timeout = emmc_set_timeout_register_value(freq);
SETR_32(SD_OPTION,
((GETR_32(SD_OPTION) & ~(SD_OPTION_TIMEOUT_CNT_MASK)) |
mmc_drv_obj.data_timeout));
/* CMD13 */
emmc_make_nontrans_cmd(CMD13_SEND_STATUS, EMMC_RCA << 16);
result =
emmc_exec_cmd(EMMC_R1_ERROR_MASK_WITHOUT_CRC, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_HIGH_SPEED);
return result;
}
return EMMC_SUCCESS;
}
static EMMC_ERROR_CODE emmc_clock_ctrl(uint8_t mode)
{
uint32_t value;
/* busy check */
if ((GETR_32(SD_INFO2) & SD_INFO2_CBSY) != 0) {
emmc_write_error_info(EMMC_FUNCNO_SET_CLOCK,
EMMC_ERR_CARD_BUSY);
return EMMC_ERR;
}
if (mode == TRUE) {
/* clock ON */
value =
((GETR_32(SD_CLK_CTRL) | MMC_SD_CLK_START) &
SD_CLK_WRITE_MASK);
SETR_32(SD_CLK_CTRL, value); /* on */
mmc_drv_obj.clock_enable = TRUE;
} else {
/* clock OFF */
value =
((GETR_32(SD_CLK_CTRL) & MMC_SD_CLK_STOP) &
SD_CLK_WRITE_MASK);
SETR_32(SD_CLK_CTRL, value); /* off */
mmc_drv_obj.clock_enable = FALSE;
}
return EMMC_SUCCESS;
}
static EMMC_ERROR_CODE emmc_bus_width(uint32_t width)
{
EMMC_ERROR_CODE result = EMMC_ERR;
/* parameter check */
if ((width != 8) && (width != 4) && (width != 1)) {
emmc_write_error_info(EMMC_FUNCNO_BUS_WIDTH, EMMC_ERR_PARAM);
return EMMC_ERR_PARAM;
}
/* state check */
if (mmc_drv_obj.selected != TRUE) {
emmc_write_error_info(EMMC_FUNCNO_BUS_WIDTH, EMMC_ERR_STATE);
return EMMC_ERR_STATE;
}
mmc_drv_obj.bus_width = (HAL_MEMCARD_DATA_WIDTH) (width >> 2); /* 2 = 8bit, 1 = 4bit, 0 =1bit */
/* CMD6 */
emmc_make_nontrans_cmd(CMD6_SWITCH,
(EMMC_SWITCH_BUS_WIDTH_1 |
(mmc_drv_obj.bus_width << 8)));
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
/* occurred error */
mmc_drv_obj.bus_width = HAL_MEMCARD_DATA_WIDTH_1_BIT;
goto EXIT;
}
switch (mmc_drv_obj.bus_width) {
case HAL_MEMCARD_DATA_WIDTH_1_BIT:
SETR_32(SD_OPTION,
((GETR_32(SD_OPTION) & ~(BIT15 | BIT13)) | BIT15));
break;
case HAL_MEMCARD_DATA_WIDTH_4_BIT:
SETR_32(SD_OPTION, (GETR_32(SD_OPTION) & ~(BIT15 | BIT13)));
break;
case HAL_MEMCARD_DATA_WIDTH_8_BIT:
SETR_32(SD_OPTION,
((GETR_32(SD_OPTION) & ~(BIT15 | BIT13)) | BIT13));
break;
default:
goto EXIT;
}
/* CMD13 */
emmc_make_nontrans_cmd(CMD13_SEND_STATUS, EMMC_RCA << 16);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
goto EXIT;
}
/* CMD8 (EXT_CSD) */
emmc_make_trans_cmd(CMD8_SEND_EXT_CSD, 0x00000000,
(uint32_t *) (&mmc_drv_obj.ext_csd_data[0]),
EMMC_MAX_EXT_CSD_LENGTH, HAL_MEMCARD_READ,
HAL_MEMCARD_NOT_DMA);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
goto EXIT;
}
return EMMC_SUCCESS;
EXIT:
emmc_write_error_info(EMMC_FUNCNO_BUS_WIDTH, result);
ERROR("BL2: emmc bus_width error end\n");
return result;
}
EMMC_ERROR_CODE emmc_select_partition(EMMC_PARTITION_ID id)
{
EMMC_ERROR_CODE result;
uint32_t arg;
uint32_t partition_config;
/* state check */
if (mmc_drv_obj.mount != TRUE) {
emmc_write_error_info(EMMC_FUNCNO_NONE, EMMC_ERR_STATE);
return EMMC_ERR_STATE;
}
/* id = PARTITION_ACCESS(Bit[2:0]) */
if ((id & ~PARTITION_ID_MASK) != 0) {
emmc_write_error_info(EMMC_FUNCNO_NONE, EMMC_ERR_PARAM);
return EMMC_ERR_PARAM;
}
/* EXT_CSD[179] value */
partition_config =
(uint32_t) mmc_drv_obj.ext_csd_data[EMMC_EXT_CSD_PARTITION_CONFIG];
if ((partition_config & PARTITION_ID_MASK) == id) {
result = EMMC_SUCCESS;
} else {
partition_config =
(uint32_t) ((partition_config & ~PARTITION_ID_MASK) | id);
arg = EMMC_SWITCH_PARTITION_CONFIG | (partition_config << 8);
result = emmc_set_ext_csd(arg);
}
return result;
}
static void set_sd_clk(uint32_t clkDiv)
{
uint32_t dataL;
dataL = (GETR_32(SD_CLK_CTRL) & (~SD_CLK_CTRL_CLKDIV_MASK));
switch (clkDiv) {
case 1:
dataL |= 0x000000FFU;
break; /* 1/1 */
case 2:
dataL |= 0x00000000U;
break; /* 1/2 */
case 4:
dataL |= 0x00000001U;
break; /* 1/4 */
case 8:
dataL |= 0x00000002U;
break; /* 1/8 */
case 16:
dataL |= 0x00000004U;
break; /* 1/16 */
case 32:
dataL |= 0x00000008U;
break; /* 1/32 */
case 64:
dataL |= 0x00000010U;
break; /* 1/64 */
case 128:
dataL |= 0x00000020U;
break; /* 1/128 */
case 256:
dataL |= 0x00000040U;
break; /* 1/256 */
case 512:
dataL |= 0x00000080U;
break; /* 1/512 */
}
SETR_32(SD_CLK_CTRL, dataL);
mmc_drv_obj.current_freq = (uint32_t) clkDiv;
}
static void emmc_get_partition_access(void)
{
uint32_t reg;
EMMC_ERROR_CODE result;
reg = mmio_read_32(RCAR_PRR) & (RCAR_PRODUCT_MASK | RCAR_CUT_MASK);
if ((reg == RCAR_PRODUCT_H3_CUT20) || (reg == RCAR_PRODUCT_M3_CUT11)) {
SETR_32(SD_OPTION, 0x000060EEU); /* 8 bits width */
/* CMD8 (EXT_CSD) */
emmc_make_trans_cmd(CMD8_SEND_EXT_CSD, 0x00000000U,
(uint32_t *) (&mmc_drv_obj.ext_csd_data[0]),
EMMC_MAX_EXT_CSD_LENGTH,
HAL_MEMCARD_READ, HAL_MEMCARD_NOT_DMA);
mmc_drv_obj.get_partition_access_flag = TRUE;
result =
emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
mmc_drv_obj.get_partition_access_flag = FALSE;
if (result == EMMC_SUCCESS) {
mmc_drv_obj.partition_access =
(EMMC_PARTITION_ID) (mmc_drv_obj.ext_csd_data[179]
& PARTITION_ID_MASK);
} else if (result == EMMC_ERR_CMD_TIMEOUT) {
mmc_drv_obj.partition_access = PARTITION_ID_BOOT_1;
} else {
emmc_write_error_info(EMMC_FUNCNO_GET_PERTITION_ACCESS,
result);
panic();
}
SETR_32(SD_OPTION, 0x0000C0EEU); /* Initialize */
}
}
static uint32_t emmc_calc_tran_speed(uint32_t *freq)
{
const uint32_t unit[8] = { 10000, 100000, 1000000, 10000000,
0, 0, 0, 0 }; /**< frequency unit (1/10) */
const uint32_t mult[16] = { 0, 10, 12, 13, 15, 20, 26, 30, 35, 40, 45,
52, 55, 60, 70, 80 };
uint32_t maxFreq;
uint32_t result;
uint32_t tran_speed = EMMC_CSD_TRAN_SPEED();
/* tran_speed = 0x32
* unit[tran_speed&0x7] = uint[0x2] = 1000000
* mult[(tran_speed&0x78)>>3] = mult[0x30>>3] = mult[6] = 26
* 1000000 * 26 = 26000000 (26MHz)
*/
result = 1;
maxFreq =
unit[tran_speed & EMMC_TRANSPEED_FREQ_UNIT_MASK] *
mult[(tran_speed & EMMC_TRANSPEED_MULT_MASK) >>
EMMC_TRANSPEED_MULT_SHIFT];
if (maxFreq == 0) {
result = 0;
} else if (MMC_FREQ_52MHZ <= maxFreq)
*freq = MMC_52MHZ;
else if (MMC_FREQ_26MHZ <= maxFreq)
*freq = MMC_26MHZ;
else if (MMC_FREQ_20MHZ <= maxFreq)
*freq = MMC_20MHZ;
else
*freq = MMC_400KHZ;
return result;
}
static uint32_t emmc_set_timeout_register_value(uint32_t freq)
{
uint32_t timeoutCnt; /* SD_OPTION - Timeout Counter */
switch (freq) {
case 1U:
timeoutCnt = 0xE0U;
break; /* SDCLK * 2^27 */
case 2U:
timeoutCnt = 0xE0U;
break; /* SDCLK * 2^27 */
case 4U:
timeoutCnt = 0xD0U;
break; /* SDCLK * 2^26 */
case 8U:
timeoutCnt = 0xC0U;
break; /* SDCLK * 2^25 */
case 16U:
timeoutCnt = 0xB0U;
break; /* SDCLK * 2^24 */
case 32U:
timeoutCnt = 0xA0U;
break; /* SDCLK * 2^23 */
case 64U:
timeoutCnt = 0x90U;
break; /* SDCLK * 2^22 */
case 128U:
timeoutCnt = 0x80U;
break; /* SDCLK * 2^21 */
case 256U:
timeoutCnt = 0x70U;
break; /* SDCLK * 2^20 */
case 512U:
timeoutCnt = 0x70U;
break; /* SDCLK * 2^20 */
default:
timeoutCnt = 0xE0U;
break; /* SDCLK * 2^27 */
}
return timeoutCnt;
}
EMMC_ERROR_CODE emmc_set_ext_csd(uint32_t arg)
{
EMMC_ERROR_CODE result;
/* CMD6 */
emmc_make_nontrans_cmd(CMD6_SWITCH, arg);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
return result;
}
/* CMD13 */
emmc_make_nontrans_cmd(CMD13_SEND_STATUS, EMMC_RCA << 16);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
return result;
}
/* CMD8 (EXT_CSD) */
emmc_make_trans_cmd(CMD8_SEND_EXT_CSD, 0x00000000,
(uint32_t *) (&mmc_drv_obj.ext_csd_data[0]),
EMMC_MAX_EXT_CSD_LENGTH, HAL_MEMCARD_READ,
HAL_MEMCARD_NOT_DMA);
result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
if (result != EMMC_SUCCESS) {
return result;
}
return EMMC_SUCCESS;
}
EMMC_ERROR_CODE emmc_set_request_mmc_clock(uint32_t *freq)
{
/* parameter check */
if (freq == NULL) {
emmc_write_error_info(EMMC_FUNCNO_SET_CLOCK, EMMC_ERR_PARAM);
return EMMC_ERR_PARAM;
}
/* state check */
if ((mmc_drv_obj.initialize != TRUE)
|| (mmc_drv_obj.card_power_enable != TRUE)) {
emmc_write_error_info(EMMC_FUNCNO_SET_CLOCK, EMMC_ERR_STATE);
return EMMC_ERR_STATE;
}
/* clock is already running in the desired frequency. */
if ((mmc_drv_obj.clock_enable == TRUE)
&& (mmc_drv_obj.current_freq == *freq)) {
return EMMC_SUCCESS;
}
/* busy check */
if ((GETR_32(SD_INFO2) & SD_INFO2_CBSY) != 0) {
emmc_write_error_info(EMMC_FUNCNO_SET_CLOCK,
EMMC_ERR_CARD_BUSY);
return EMMC_ERR;
}
set_sd_clk(*freq);
mmc_drv_obj.clock_enable = FALSE;
return emmc_clock_ctrl(TRUE); /* clock on */
}
EMMC_ERROR_CODE rcar_emmc_mount(void)
{
EMMC_ERROR_CODE result;
/* state check */
if ((mmc_drv_obj.initialize != TRUE)
|| (mmc_drv_obj.card_power_enable != TRUE)
|| ((GETR_32(SD_INFO2) & SD_INFO2_CBSY) != 0)
) {
emmc_write_error_info(EMMC_FUNCNO_MOUNT, EMMC_ERR_STATE);
return EMMC_ERR_STATE;
}
/* initialize card (IDLE state --> Transfer state) */
result = emmc_card_init();
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_CARD_INIT);
if (emmc_clock_ctrl(FALSE) != EMMC_SUCCESS) {
/* nothing to do. */
}
return result;
}
/* Switching high speed mode */
result = emmc_high_speed();
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_HIGH_SPEED);
if (emmc_clock_ctrl(FALSE) != EMMC_SUCCESS) {
/* nothing to do. */
}
return result;
}
/* Changing the data bus width */
result = emmc_bus_width(8);
if (result != EMMC_SUCCESS) {
emmc_write_error_info_func_no(EMMC_FUNCNO_BUS_WIDTH);
if (emmc_clock_ctrl(FALSE) != EMMC_SUCCESS) {
/* nothing to do. */
}
return result;
}
/* mount complete */
mmc_drv_obj.mount = TRUE;
return EMMC_SUCCESS;
}
