Merge pull request #1582 from ldts/rcar_gen3/upstream

rcar_gen3: initial support

drivers/renesas/rcar/emmc/emmc_interrupt.c

+/*
+ * Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights
+ * reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include "emmc_config.h"
+#include "emmc_def.h"
+#include "emmc_hal.h"
+#include "emmc_registers.h"
+#include "emmc_std.h"
+#include "rcar_def.h"
+
+#include <mmio.h>
+#include <stddef.h>
+
+static EMMC_ERROR_CODE emmc_trans_sector(uint32_t *buff_address_virtual);
+
+uint32_t emmc_interrupt(void)
+{
+	EMMC_ERROR_CODE result;
+	uint32_t prr_data;
+	uint32_t cut_ver;
+	uint32_t end_bit;
+
+	prr_data = mmio_read_32((uintptr_t) RCAR_PRR);
+	cut_ver = prr_data & RCAR_CUT_MASK;
+	if ((prr_data & RCAR_PRODUCT_MASK) == RCAR_PRODUCT_H3) {
+		if (cut_ver == RCAR_CUT_VER10) {
+			end_bit = BIT17;
+		} else if (cut_ver == RCAR_CUT_VER11) {
+			end_bit = BIT17;
+		} else {
+			end_bit = BIT20;
+		}
+	} else if ((prr_data & RCAR_PRODUCT_MASK) == RCAR_PRODUCT_M3) {
+		if (cut_ver == RCAR_CUT_VER10) {
+			end_bit = BIT17;
+		} else {
+			end_bit = BIT20;
+		}
+	} else {
+		end_bit = BIT20;
+	}
+
+	/* SD_INFO */
+	mmc_drv_obj.error_info.info1 = GETR_32(SD_INFO1);
+	mmc_drv_obj.error_info.info2 = GETR_32(SD_INFO2);
+
+	/* SD_INFO EVENT */
+	mmc_drv_obj.int_event1 =
+	    mmc_drv_obj.error_info.info1 & GETR_32(SD_INFO1_MASK);
+	mmc_drv_obj.int_event2 =
+	    mmc_drv_obj.error_info.info2 & GETR_32(SD_INFO2_MASK);
+
+	/* ERR_STS */
+	mmc_drv_obj.error_info.status1 = GETR_32(SD_ERR_STS1);
+	mmc_drv_obj.error_info.status2 = GETR_32(SD_ERR_STS2);
+
+	/* DM_CM_INFO */
+	mmc_drv_obj.error_info.dm_info1 = GETR_32(DM_CM_INFO1);
+	mmc_drv_obj.error_info.dm_info2 = GETR_32(DM_CM_INFO2);
+
+	/* DM_CM_INFO EVENT */
+	mmc_drv_obj.dm_event1 =
+	    mmc_drv_obj.error_info.dm_info1 & GETR_32(DM_CM_INFO1_MASK);
+	mmc_drv_obj.dm_event2 =
+	    mmc_drv_obj.error_info.dm_info2 & GETR_32(DM_CM_INFO2_MASK);
+
+	/* ERR SD_INFO2 */
+	if ((SD_INFO2_ALL_ERR & mmc_drv_obj.int_event2) != 0) {
+		SETR_32(SD_INFO1_MASK, 0x00000000U);	/* interrupt disable */
+		SETR_32(SD_INFO2_MASK, SD_INFO2_CLEAR);	/* interrupt disable */
+		SETR_32(SD_INFO1, 0x00000000U);	/* interrupt clear */
+		SETR_32(SD_INFO2, SD_INFO2_CLEAR);	/* interrupt clear */
+		mmc_drv_obj.state_machine_blocking = FALSE;
+	}
+
+	/* PIO Transfer */
+	/* BWE/BRE */
+	else if (((SD_INFO2_BWE | SD_INFO2_BRE) & mmc_drv_obj.int_event2)) {
+		/* BWE */
+		if (SD_INFO2_BWE & mmc_drv_obj.int_event2) {
+			SETR_32(SD_INFO2, (GETR_32(SD_INFO2) & ~SD_INFO2_BWE));
+		}
+		/* BRE */
+		else {
+			SETR_32(SD_INFO2, (GETR_32(SD_INFO2) & ~SD_INFO2_BRE));
+		}
+
+		result = emmc_trans_sector(mmc_drv_obj.buff_address_virtual);
+		mmc_drv_obj.buff_address_virtual += EMMC_BLOCK_LENGTH;
+		mmc_drv_obj.remain_size -= EMMC_BLOCK_LENGTH;
+
+		if (result != EMMC_SUCCESS) {
+			/* data transfer error */
+			emmc_write_error_info(EMMC_FUNCNO_NONE, result);
+
+			/* Panic */
+			SETR_32(SD_INFO1_MASK, 0x00000000U);
+			SETR_32(SD_INFO2_MASK, SD_INFO2_CLEAR);
+			SETR_32(SD_INFO1, 0x00000000U);
+			/* interrupt clear */
+			SETR_32(SD_INFO2, SD_INFO2_CLEAR);
+			mmc_drv_obj.force_terminate = TRUE;
+		} else {
+			mmc_drv_obj.during_transfer = FALSE;
+		}
+		mmc_drv_obj.state_machine_blocking = FALSE;
+	}
+
+	/* DMA_TRANSFER */
+	/* DM_CM_INFO1: DMA-ch0 transfer complete or error occurred */
+	else if ((BIT16 & mmc_drv_obj.dm_event1) != 0) {
+		SETR_32(DM_CM_INFO1, 0x00000000U);
+		SETR_32(DM_CM_INFO2, 0x00000000U);
+		/* interrupt clear */
+		SETR_32(SD_INFO2, (GETR_32(SD_INFO2) & ~SD_INFO2_BWE));
+		/* DM_CM_INFO2:  DMA-ch0 error occured */
+		if ((BIT16 & mmc_drv_obj.dm_event2) != 0) {
+			mmc_drv_obj.dma_error_flag = TRUE;
+		} else {
+			mmc_drv_obj.during_dma_transfer = FALSE;
+			mmc_drv_obj.during_transfer = FALSE;
+		}
+		/* wait next interrupt */
+		mmc_drv_obj.state_machine_blocking = FALSE;
+	}
+	/* DM_CM_INFO1: DMA-ch1 transfer complete or error occured */
+	else if ((end_bit & mmc_drv_obj.dm_event1) != 0U) {
+		SETR_32(DM_CM_INFO1, 0x00000000U);
+		SETR_32(DM_CM_INFO2, 0x00000000U);
+		/* interrupt clear */
+		SETR_32(SD_INFO2, (GETR_32(SD_INFO2) & ~SD_INFO2_BRE));
+		/* DM_CM_INFO2: DMA-ch1 error occured */
+		if ((BIT17 & mmc_drv_obj.dm_event2) != 0) {
+			mmc_drv_obj.dma_error_flag = TRUE;
+		} else {
+			mmc_drv_obj.during_dma_transfer = FALSE;
+			mmc_drv_obj.during_transfer = FALSE;
+		}
+		/* wait next interrupt */
+		mmc_drv_obj.state_machine_blocking = FALSE;
+	}
+
+	/* Response end  */
+	else if ((SD_INFO1_INFO0 & mmc_drv_obj.int_event1) != 0) {
+		/* interrupt clear */
+		SETR_32(SD_INFO1, (GETR_32(SD_INFO1) & ~SD_INFO1_INFO0));
+		mmc_drv_obj.state_machine_blocking = FALSE;
+	}
+	/* Access end  */
+	else if ((SD_INFO1_INFO2 & mmc_drv_obj.int_event1) != 0) {
+		/* interrupt clear */
+		SETR_32(SD_INFO1, (GETR_32(SD_INFO1) & ~SD_INFO1_INFO2));
+		mmc_drv_obj.state_machine_blocking = FALSE;
+	} else {
+		/* nothing to do. */
+	}
+
+	return (uint32_t) 0;
+}
+
+static EMMC_ERROR_CODE emmc_trans_sector(uint32_t *buff_address_virtual)
+{
+	uint32_t length, i;
+	uint64_t *bufPtrLL;
+
+	if (buff_address_virtual == NULL) {
+		return EMMC_ERR_PARAM;
+	}
+
+	if ((mmc_drv_obj.during_transfer != TRUE)
+	    || (mmc_drv_obj.remain_size == 0)) {
+		return EMMC_ERR_STATE;
+	}
+
+	bufPtrLL = (uint64_t *) buff_address_virtual;
+	length = mmc_drv_obj.remain_size;
+
+	/* data transefer */
+	for (i = 0; i < (length >> 3); i++) {
+		/* Write */
+		if (mmc_drv_obj.cmd_info.dir == HAL_MEMCARD_WRITE) {
+			SETR_64(SD_BUF0, *bufPtrLL);	/* buffer --> FIFO */
+		}
+		/* Read */
+		else {
+			/* Checks when the read data reaches SD_SIZE. */
+			/* The BRE bit is cleared at emmc_interrupt function. */
+			if (((i %
+			      (uint32_t) (EMMC_BLOCK_LENGTH >>
+					  EMMC_BUF_SIZE_SHIFT)) == 0U)
+			    && (i != 0U)) {
+				/* BRE check */
+				while (((GETR_32(SD_INFO2)) & SD_INFO2_BRE) ==
+				       0U) {
+					/* ERROR check */
+					if (((GETR_32(SD_INFO2)) &
+					     SD_INFO2_ALL_ERR) != 0U) {
+						return EMMC_ERR_TRANSFER;
+					}
+				}
+				/* BRE clear */
+				SETR_32(SD_INFO2,
+					(uint32_t) (GETR_32(SD_INFO2) &
+						    ~SD_INFO2_BRE));
+			}
+			*bufPtrLL = GETR_64(SD_BUF0);	/* FIFO --> buffer */
+		}
+		bufPtrLL++;
+	}
+
+	return EMMC_SUCCESS;
+}

drivers/renesas/rcar/emmc/emmc_mount.c

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <debug.h>
+#include <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;
+}

drivers/renesas/rcar/emmc/emmc_read.c

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <arch_helpers.h>
+#include "emmc_config.h"
+#include "emmc_hal.h"
+#include "emmc_std.h"
+#include "emmc_registers.h"
+#include "emmc_def.h"
+
+#define MIN_EMMC(a, b)        (((a) < (b)) ? (a) : (b))
+#define EMMC_RW_SECTOR_COUNT_MAX        0x0000ffffU
+
+static EMMC_ERROR_CODE emmc_multiple_block_read (uint32_t *buff_address_virtual,
+		uint32_t sector_number, uint32_t count,
+		HAL_MEMCARD_DATA_TRANSFER_MODE transfer_mode)
+{
+	EMMC_ERROR_CODE result;
+
+	/* parameter check */
+	if ((count > EMMC_RW_SECTOR_COUNT_MAX)
+	    || (count == 0)
+	    || ((transfer_mode != HAL_MEMCARD_DMA)
+		&& (transfer_mode != HAL_MEMCARD_NOT_DMA))
+	    ) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR, EMMC_ERR_PARAM);
+		return EMMC_ERR_PARAM;
+	}
+
+	/* CMD23 */
+	emmc_make_nontrans_cmd(CMD23_SET_BLOCK_COUNT, count);
+	result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
+	if (result != EMMC_SUCCESS) {
+		return result;
+	}
+	SETR_32(SD_SECCNT, count);
+	SETR_32(SD_STOP, 0x00000100);
+	SETR_32(CC_EXT_MODE, (CC_EXT_MODE_CLEAR | CC_EXT_MODE_DMASDRW_ENABLE));	/* SD_BUF Read/Write DMA Transfer enable */
+
+	/* CMD18 */
+	emmc_make_trans_cmd(CMD18_READ_MULTIPLE_BLOCK, sector_number,
+			    buff_address_virtual,
+			    count << EMMC_SECTOR_SIZE_SHIFT, HAL_MEMCARD_READ,
+			    transfer_mode);
+	result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
+	if (result != EMMC_SUCCESS) {
+		return result;	/* CMD18 error code */
+	}
+
+	/* 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;
+	}
+#if RCAR_BL2_DCACHE == 1
+	if (transfer_mode == HAL_MEMCARD_NOT_DMA) {
+		flush_dcache_range((uint64_t) buff_address_virtual,
+				   ((size_t) count << EMMC_SECTOR_SIZE_SHIFT));
+	}
+#endif /* RCAR_BL2_DCACHE == 1 */
+
+	/* ready status check */
+	if ((mmc_drv_obj.r1_card_status & EMMC_R1_READY) == 0) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR,
+				      EMMC_ERR_CARD_BUSY);
+		return EMMC_ERR_CARD_BUSY;
+	}
+
+	/* state check */
+	if (mmc_drv_obj.current_state != EMMC_R1_STATE_TRAN) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR,
+				      EMMC_ERR_CARD_STATE);
+		return EMMC_ERR_CARD_STATE;
+	}
+
+	return EMMC_SUCCESS;
+}
+
+EMMC_ERROR_CODE emmc_read_sector(uint32_t *buff_address_virtual,
+				 uint32_t sector_number,
+				 uint32_t count, uint32_t feature_flags)
+{
+	uint32_t trans_count;
+	uint32_t remain;
+	EMMC_ERROR_CODE result;
+	HAL_MEMCARD_DATA_TRANSFER_MODE transfer_mode;
+
+	/* parameter check */
+	if (count == 0) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR, EMMC_ERR_PARAM);
+		return EMMC_ERR_PARAM;
+	}
+
+	/* state check */
+	if (mmc_drv_obj.mount != TRUE) {
+		emmc_write_error_info(EMMC_FUNCNO_READ_SECTOR, EMMC_ERR_STATE);
+		return EMMC_ERR_STATE;
+	}
+
+	/* DMA? */
+	if ((feature_flags & LOADIMAGE_FLAGS_DMA_ENABLE) != 0) {
+		transfer_mode = HAL_MEMCARD_DMA;
+	} else {
+		transfer_mode = HAL_MEMCARD_NOT_DMA;
+	}
+
+	remain = count;
+	while (remain != 0) {
+		trans_count = MIN_EMMC(remain, EMMC_RW_SECTOR_COUNT_MAX);
+		result =
+		    emmc_multiple_block_read(buff_address_virtual,
+					     sector_number, trans_count,
+					     transfer_mode);
+		if (result != EMMC_SUCCESS) {
+			return result;
+		}
+
+		buff_address_virtual += (EMMC_BLOCK_LENGTH_DW * trans_count);
+		sector_number += trans_count;
+		remain -= trans_count;
+	}
+
+	return EMMC_SUCCESS;
+}

drivers/renesas/rcar/emmc/emmc_registers.h

+/*
+ * Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/**
+ * @file  emmc_registers.h
+ * @brief emmc boot driver is expecting this header file. HS-MMC module header file.
+ *
+ */
+
+#ifndef __EMMC_REGISTERS_H__
+#define __EMMC_REGISTERS_H__
+
+/* ************************ HEADER (INCLUDE) SECTION *********************** */
+
+/* ***************** MACROS, CONSTANTS, COMPILATION FLAGS ****************** */
+
+/* MMC channel select */
+#define MMC_CH0		(0U)	/* SDHI2/MMC0 */
+#define MMC_CH1		(1U)	/* SDHI3/MMC1 */
+
+#if RCAR_LSI == RCAR_E3
+#define USE_MMC_CH	(MMC_CH1)	/* R-Car E3 */
+#else /* RCAR_LSI == RCAR_E3 */
+#define USE_MMC_CH	(MMC_CH0)	/* R-Car H3/M3/M3N */
+#endif /* RCAR_LSI == RCAR_E3 */
+
+#define		BIT0	(0x00000001U)
+#define		BIT1	(0x00000002U)
+#define		BIT2	(0x00000004U)
+#define		BIT3	(0x00000008U)
+#define		BIT4	(0x00000010U)
+#define		BIT5	(0x00000020U)
+#define		BIT6	(0x00000040U)
+#define		BIT7	(0x00000080U)
+#define		BIT8	(0x00000100U)
+#define		BIT9	(0x00000200U)
+#define		BIT10	(0x00000400U)
+#define		BIT11	(0x00000800U)
+#define		BIT12	(0x00001000U)
+#define		BIT13	(0x00002000U)
+#define		BIT14	(0x00004000U)
+#define		BIT15	(0x00008000U)
+#define		BIT16	(0x00010000U)
+#define		BIT17	(0x00020000U)
+#define		BIT18	(0x00040000U)
+#define		BIT19	(0x00080000U)
+#define		BIT20	(0x00100000U)
+#define		BIT21	(0x00200000U)
+#define		BIT22	(0x00400000U)
+#define		BIT23	(0x00800000U)
+#define		BIT24	(0x01000000U)
+#define		BIT25	(0x02000000U)
+#define		BIT26	(0x04000000U)
+#define		BIT27	(0x08000000U)
+#define		BIT28	(0x10000000U)
+#define		BIT29	(0x20000000U)
+#define		BIT30	(0x40000000U)
+#define		BIT31	(0x80000000U)
+
+/** @brief Clock Pulse Generator (CPG) registers
+ */
+#define	CPG_BASE		(0xE6150000U)
+
+#define	CPG_MSTPSR3		(CPG_BASE+0x0048U)	/* Module stop status register 3 */
+
+#define	CPG_SMSTPCR3		(CPG_BASE+0x013CU)	/* System module stop control register 3 */
+
+#define	CPG_SD2CKCR		(CPG_BASE+0x0268U)	/* SDHI2 clock frequency control register */
+#define CPG_SD3CKCR		(CPG_BASE+0x026CU)	/* SDHI3 clock frequency control register */
+
+#define	CPG_CPGWPR		(CPG_BASE+0x0900U)	/* CPG Write Protect Register */
+
+#if USE_MMC_CH == MMC_CH0
+#define	CPG_SDxCKCR		(CPG_SD2CKCR)	/* SDHI2/MMC0 */
+#else /* USE_MMC_CH == MMC_CH0 */
+#define	CPG_SDxCKCR		(CPG_SD3CKCR)	/* SDHI3/MMC1 */
+#endif /* USE_MMC_CH == MMC_CH0 */
+
+/** Boot Status register
+ */
+#define  MFISBTSTSR			(0xE6260604U)
+
+#define  MFISBTSTSR_BOOT_PARTITION	(0x00000010U)
+
+/** brief eMMC registers
+ */
+#define	MMC0_SD_BASE		(0xEE140000U)
+#define MMC1_SD_BASE		(0xEE160000U)
+
+#if USE_MMC_CH == MMC_CH0
+#define	MMC_SD_BASE		(MMC0_SD_BASE)
+#else /* USE_MMC_CH == MMC_CH0 */
+#define	MMC_SD_BASE		(MMC1_SD_BASE)
+#endif /* USE_MMC_CH == MMC_CH0 */
+
+#define SD_CMD			(MMC_SD_BASE + 0x0000U)
+#define SD_PORTSEL		(MMC_SD_BASE + 0x0008U)
+#define SD_ARG			(MMC_SD_BASE + 0x0010U)
+#define SD_ARG1			(MMC_SD_BASE + 0x0018U)
+#define SD_STOP			(MMC_SD_BASE + 0x0020U)
+#define SD_SECCNT		(MMC_SD_BASE + 0x0028U)
+#define SD_RSP10		(MMC_SD_BASE + 0x0030U)
+#define SD_RSP1			(MMC_SD_BASE + 0x0038U)
+#define SD_RSP32		(MMC_SD_BASE + 0x0040U)
+#define SD_RSP3			(MMC_SD_BASE + 0x0048U)
+#define SD_RSP54		(MMC_SD_BASE + 0x0050U)
+#define SD_RSP5			(MMC_SD_BASE + 0x0058U)
+#define SD_RSP76		(MMC_SD_BASE + 0x0060U)
+#define SD_RSP7			(MMC_SD_BASE + 0x0068U)
+#define SD_INFO1		(MMC_SD_BASE + 0x0070U)
+#define SD_INFO2		(MMC_SD_BASE + 0x0078U)
+#define SD_INFO1_MASK		(MMC_SD_BASE + 0x0080U)
+#define SD_INFO2_MASK		(MMC_SD_BASE + 0x0088U)
+#define SD_CLK_CTRL		(MMC_SD_BASE + 0x0090U)
+#define SD_SIZE			(MMC_SD_BASE + 0x0098U)
+#define SD_OPTION		(MMC_SD_BASE + 0x00A0U)
+#define SD_ERR_STS1		(MMC_SD_BASE + 0x00B0U)
+#define SD_ERR_STS2		(MMC_SD_BASE + 0x00B8U)
+#define SD_BUF0			(MMC_SD_BASE + 0x00C0U)
+#define SDIO_MODE		(MMC_SD_BASE + 0x00D0U)
+#define SDIO_INFO1		(MMC_SD_BASE + 0x00D8U)
+#define SDIO_INFO1_MASK		(MMC_SD_BASE + 0x00E0U)
+#define CC_EXT_MODE		(MMC_SD_BASE + 0x0360U)
+#define SOFT_RST		(MMC_SD_BASE + 0x0380U)
+#define VERSION			(MMC_SD_BASE + 0x0388U)
+#define HOST_MODE		(MMC_SD_BASE + 0x0390U)
+#define DM_CM_DTRAN_MODE	(MMC_SD_BASE + 0x0820U)
+#define DM_CM_DTRAN_CTRL	(MMC_SD_BASE + 0x0828U)
+#define DM_CM_RST		(MMC_SD_BASE + 0x0830U)
+#define DM_CM_INFO1		(MMC_SD_BASE + 0x0840U)
+#define DM_CM_INFO1_MASK	(MMC_SD_BASE + 0x0848U)
+#define DM_CM_INFO2		(MMC_SD_BASE + 0x0850U)
+#define DM_CM_INFO2_MASK	(MMC_SD_BASE + 0x0858U)
+#define DM_DTRAN_ADDR		(MMC_SD_BASE + 0x0880U)
+
+/** @brief SD_INFO1 Registers
+ */
+#define SD_INFO1_HPIRES				0x00010000UL	/* Response Reception Completion        */
+#define SD_INFO1_INFO10				0x00000400UL	/* Indicates the SDDAT3 state           */
+#define SD_INFO1_INFO9				0x00000200UL	/* SDDAT3 Card Insertion                        */
+#define SD_INFO1_INFO8				0x00000100UL	/* SDDAT3 Card Removal                          */
+#define SD_INFO1_INFO7				0x00000080UL	/* Write Protect                                        */
+#define SD_INFO1_INFO5				0x00000020UL	/* Indicates the ISDCD state            */
+#define SD_INFO1_INFO4				0x00000010UL	/* ISDCD Card Insertion                         */
+#define SD_INFO1_INFO3				0x00000008UL	/* ISDCD Card Removal                           */
+#define SD_INFO1_INFO2				0x00000004UL	/* Access end                                           */
+#define SD_INFO1_INFO0				0x00000001UL	/* Response end                                         */
+
+/** @brief SD_INFO2 Registers
+ */
+#define SD_INFO2_ILA				0x00008000UL	/* Illegal Access Error                 */
+#define SD_INFO2_CBSY				0x00004000UL	/* Command Type Register Busy   */
+#define SD_INFO2_SCLKDIVEN			0x00002000UL
+#define SD_INFO2_BWE				0x00000200UL	/* SD_BUF Write Enable                  */
+#define SD_INFO2_BRE				0x00000100UL	/* SD_BUF Read Enable                   */
+#define SD_INFO2_DAT0				0x00000080UL	/* SDDAT0                                               */
+#define SD_INFO2_ERR6				0x00000040UL	/* Response Timeout                             */
+#define SD_INFO2_ERR5				0x00000020UL	/* SD_BUF Illegal Read Access   */
+#define SD_INFO2_ERR4				0x00000010UL	/* SD_BUF Illegal Write Access  */
+#define SD_INFO2_ERR3				0x00000008UL	/* Data Timeout                                 */
+#define SD_INFO2_ERR2				0x00000004UL	/* END Error                                    */
+#define SD_INFO2_ERR1				0x00000002UL	/* CRC Error                                    */
+#define SD_INFO2_ERR0				0x00000001UL	/* CMD Error                                    */
+#define SD_INFO2_ALL_ERR			0x0000807FUL
+#define SD_INFO2_CLEAR				0x00000800UL	/* BIT11 The write value should always be 1. HWM_0003 */
+
+/** @brief SOFT_RST
+ */
+#define SOFT_RST_SDRST				0x00000001UL
+
+/** @brief SD_CLK_CTRL
+ */
+#define SD_CLK_CTRL_SDCLKOFFEN		0x00000200UL
+#define SD_CLK_CTRL_SCLKEN			0x00000100UL
+#define SD_CLK_CTRL_CLKDIV_MASK     0x000000FFUL
+#define SD_CLOCK_ENABLE             0x00000100UL
+#define SD_CLOCK_DISABLE            0x00000000UL
+#define SD_CLK_WRITE_MASK           0x000003FFUL
+#define SD_CLK_CLKDIV_CLEAR_MASK    0xFFFFFF0FUL
+
+/** @brief SD_OPTION
+ */
+#define SD_OPTION_TIMEOUT_CNT_MASK	0x000000F0UL
+
+/** @brief MMC Clock Frequency
+ * 200MHz * 1/x = output clock
+ */
+#define MMC_CLK_OFF			0UL	/* Clock output is disabled                                                             */
+#define MMC_400KHZ			512UL	/* 200MHz * 1/512 = 390 KHz                             */
+#define MMC_20MHZ			16UL	/* 200MHz * 1/16   = 12.5 MHz Normal speed mode         */
+#define MMC_26MHZ			8UL	/* 200MHz * 1/8   = 25 MHz High speed mode 26Mhz        */
+#define MMC_52MHZ			4UL	/* 200MHz * 1/4   = 50 MHz High speed mode 52Mhz        */
+#define MMC_100MHZ			2UL	/* 200MHz * 1/2   = 100 MHz                             */
+#define MMC_200MHZ			1UL	/* 200MHz * 1/1   = 200 MHz                             */
+
+#define MMC_FREQ_52MHZ		52000000UL
+#define MMC_FREQ_26MHZ		26000000UL
+#define MMC_FREQ_20MHZ		20000000UL
+
+/** @brief MMC Clock DIV
+ */
+#define MMC_SD_CLK_START	0x00000100UL	/* CLOCK On             */
+#define MMC_SD_CLK_STOP		(~0x00000100UL)	/* CLOCK stop   */
+#define MMC_SD_CLK_DIV1		0x000000FFUL	/* 1/1          */
+#define MMC_SD_CLK_DIV2		0x00000000UL	/* 1/2          */
+#define MMC_SD_CLK_DIV4		0x00000001UL	/* 1/4          */
+#define MMC_SD_CLK_DIV8		0x00000002UL	/* 1/8          */
+#define MMC_SD_CLK_DIV16	0x00000004UL	/* 1/16         */
+#define MMC_SD_CLK_DIV32	0x00000008UL	/* 1/32         */
+#define MMC_SD_CLK_DIV64	0x00000010UL	/* 1/64         */
+#define MMC_SD_CLK_DIV128	0x00000020UL	/* 1/128        */
+#define MMC_SD_CLK_DIV256	0x00000040UL	/* 1/256        */
+#define MMC_SD_CLK_DIV512	0x00000080UL	/* 1/512        */
+
+/** @brief DM_CM_DTRAN_MODE
+ */
+#define DM_CM_DTRAN_MODE_CH0		0x00000000UL	/* CH0(downstream)      */
+#define DM_CM_DTRAN_MODE_CH1		0x00010000UL	/* CH1(upstream)        */
+#define DM_CM_DTRAN_MODE_BIT_WIDTH	0x00000030UL
+
+/** @brief CC_EXT_MODE
+ */
+#define CC_EXT_MODE_DMASDRW_ENABLE	0x00000002UL	/* SD_BUF Read/Write DMA Transfer */
+#define CC_EXT_MODE_CLEAR			0x00001010UL	/* BIT 12 & 4 always 1. */
+
+/** @brief DM_CM_INFO_MASK
+ */
+#define DM_CM_INFO_MASK_CLEAR		0xFFFCFFFEUL
+#define DM_CM_INFO_CH0_ENABLE		0x00010001UL
+#define DM_CM_INFO_CH1_ENABLE		0x00020001UL
+
+/** @brief DM_DTRAN_ADDR
+ */
+#define DM_DTRAN_ADDR_WRITE_MASK	0xFFFFFFF8UL
+
+/** @brief DM_CM_DTRAN_CTRL
+ */
+#define DM_CM_DTRAN_CTRL_START		0x00000001UL
+
+/** @brief SYSC Registers
+ */
+#if USE_MMC_CH == MMC_CH0
+#define CPG_MSTP_MMC		(BIT12)	/* SDHI2/MMC0 */
+#else /* USE_MMC_CH == MMC_CH0 */
+#define CPG_MSTP_MMC		(BIT11)	/* SDHI3/MMC1 */
+#endif /* USE_MMC_CH == MMC_CH0 */
+
+/* ********************** STRUCTURES, TYPE DEFINITIONS ********************* */
+
+/* ********************** DECLARATION OF EXTERNAL DATA ********************* */
+
+/* ************************** FUNCTION PROTOTYPES ************************** */
+
+/* ********************************* CODE ********************************** */
+
+#endif /* __EMMC_REGISTERS_H__ */
+/* ******************************** END ************************************ */

drivers/renesas/rcar/emmc/emmc_utility.c

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <debug.h>
+#include "emmc_config.h"
+#include "emmc_hal.h"
+#include "emmc_std.h"
+#include "emmc_registers.h"
+#include "emmc_def.h"
+
+static const uint32_t cmd_reg_hw[EMMC_CMD_MAX + 1] = {
+	0x00000000,		/* CMD0 */
+	0x00000701,		/* CMD1 */
+	0x00000002,		/* CMD2 */
+	0x00000003,		/* CMD3 */
+	0x00000004,		/* CMD4 */
+	0x00000505,		/* CMD5 */
+	0x00000406,		/* CMD6 */
+	0x00000007,		/* CMD7 */
+	0x00001C08,		/* CMD8 */
+	0x00000009,		/* CMD9 */
+	0x0000000A,		/* CMD10 */
+	0x00000000,		/* reserved */
+	0x0000000C,		/* CMD12 */
+	0x0000000D,		/* CMD13 */
+	0x00001C0E,		/* CMD14 */
+	0x0000000F,		/* CMD15 */
+	0x00000010,		/* CMD16 */
+	0x00000011,		/* CMD17 */
+	0x00007C12,		/* CMD18 */
+	0x00000C13,		/* CMD19 */
+	0x00000000,
+	0x00001C15,		/* CMD21 */
+	0x00000000,
+	0x00000017,		/* CMD23 */
+	0x00000018,		/* CMD24 */
+	0x00006C19,		/* CMD25 */
+	0x00000C1A,		/* CMD26 */
+	0x0000001B,		/* CMD27 */
+	0x0000001C,		/* CMD28 */
+	0x0000001D,		/* CMD29 */
+	0x0000001E,		/* CMD30 */
+	0x00001C1F,		/* CMD31 */
+	0x00000000,
+	0x00000000,
+	0x00000000,
+	0x00000423,		/* CMD35 */
+	0x00000424,		/* CMD36 */
+	0x00000000,
+	0x00000026,		/* CMD38 */
+	0x00000427,		/* CMD39 */
+	0x00000428,		/* CMD40(send cmd) */
+	0x00000000,
+	0x0000002A,		/* CMD42 */
+	0x00000000,
+	0x00000000,
+	0x00000000,
+	0x00000000,
+	0x00000000,
+	0x00000000,
+	0x00000C31,
+	0x00000000,
+	0x00000000,
+	0x00000000,
+	0x00007C35,
+	0x00006C36,
+	0x00000037,		/* CMD55 */
+	0x00000038,		/* CMD56(Read) */
+	0x00000000,
+	0x00000000,
+	0x00000000,
+	0x00000000
+};
+
+uint32_t emmc_bit_field(uint8_t *data, uint32_t top, uint32_t bottom)
+{
+	uint32_t value;
+
+	uint32_t index_top = (uint32_t) (15 - (top >> 3));
+	uint32_t index_bottom = (uint32_t) (15 - (bottom >> 3));
+
+	if (index_top == index_bottom) {
+		value = data[index_top];
+	} else if ((index_top + 1) == index_bottom) {
+		value =
+		    (uint32_t) ((data[index_top] << 8) | data[index_bottom]);
+	} else if ((index_top + 2) == index_bottom) {
+		value =
+		    (uint32_t) ((data[index_top] << 16) |
+				(data[index_top + 1] << 8) | data[index_top +
+								  2]);
+	} else {
+		value =
+		    (uint32_t) ((data[index_top] << 24) |
+				(data[index_top + 1] << 16) |
+				(data[index_top + 2] << 8) | data[index_top +
+								  3]);
+	}
+
+	value = ((value >> (bottom & 0x07)) & ((1 << (top - bottom + 1)) - 1));
+
+	return value;
+}
+
+void emmc_write_error_info(uint16_t func_no, EMMC_ERROR_CODE error_code)
+{
+
+	mmc_drv_obj.error_info.num = func_no;
+	mmc_drv_obj.error_info.code = (uint16_t) error_code;
+
+	ERROR("BL2: emmc err:func_no=0x%x code=0x%x\n", func_no, error_code);
+}
+
+void emmc_write_error_info_func_no(uint16_t func_no)
+{
+
+	mmc_drv_obj.error_info.num = func_no;
+
+	ERROR("BL2: emmc err:func_no=0x%x\n", func_no);
+}
+
+void emmc_make_nontrans_cmd(HAL_MEMCARD_COMMAND cmd, uint32_t arg)
+{
+	/* command information */
+	mmc_drv_obj.cmd_info.cmd = cmd;
+	mmc_drv_obj.cmd_info.arg = arg;
+	mmc_drv_obj.cmd_info.dir = HAL_MEMCARD_READ;
+	mmc_drv_obj.cmd_info.hw =
+	    cmd_reg_hw[cmd & HAL_MEMCARD_COMMAND_INDEX_MASK];
+
+	/* clear data transfer information */
+	mmc_drv_obj.trans_size = 0;
+	mmc_drv_obj.remain_size = 0;
+	mmc_drv_obj.buff_address_virtual = NULL;
+	mmc_drv_obj.buff_address_physical = NULL;
+
+	/* response information */
+	mmc_drv_obj.response_length = 6;
+
+	switch (mmc_drv_obj.cmd_info.cmd & HAL_MEMCARD_RESPONSE_TYPE_MASK) {
+	case HAL_MEMCARD_RESPONSE_NONE:
+		mmc_drv_obj.response = (uint32_t *) mmc_drv_obj.response_data;
+		mmc_drv_obj.response_length = 0;
+		break;
+	case HAL_MEMCARD_RESPONSE_R1:
+		mmc_drv_obj.response = &mmc_drv_obj.r1_card_status;
+		break;
+	case HAL_MEMCARD_RESPONSE_R1b:
+		mmc_drv_obj.cmd_info.hw |= BIT10;	/* bit10 = R1 busy bit */
+		mmc_drv_obj.response = &mmc_drv_obj.r1_card_status;
+		break;
+	case HAL_MEMCARD_RESPONSE_R2:
+		mmc_drv_obj.response = (uint32_t *) mmc_drv_obj.response_data;
+		mmc_drv_obj.response_length = 17;
+		break;
+	case HAL_MEMCARD_RESPONSE_R3:
+		mmc_drv_obj.response = &mmc_drv_obj.r3_ocr;
+		break;
+	case HAL_MEMCARD_RESPONSE_R4:
+		mmc_drv_obj.response = &mmc_drv_obj.r4_resp;
+		break;
+	case HAL_MEMCARD_RESPONSE_R5:
+		mmc_drv_obj.response = &mmc_drv_obj.r5_resp;
+		break;
+	default:
+		mmc_drv_obj.response = (uint32_t *) mmc_drv_obj.response_data;
+		break;
+	}
+}
+
+void emmc_make_trans_cmd(HAL_MEMCARD_COMMAND cmd, uint32_t arg,
+			 uint32_t *buff_address_virtual,
+			 uint32_t len,
+			 HAL_MEMCARD_OPERATION dir,
+			 HAL_MEMCARD_DATA_TRANSFER_MODE transfer_mode)
+{
+	emmc_make_nontrans_cmd(cmd, arg);	/* update common information */
+
+	/* for data transfer command */
+	mmc_drv_obj.cmd_info.dir = dir;
+	mmc_drv_obj.buff_address_virtual = buff_address_virtual;
+	mmc_drv_obj.buff_address_physical = buff_address_virtual;
+	mmc_drv_obj.trans_size = len;
+	mmc_drv_obj.remain_size = len;
+	mmc_drv_obj.transfer_mode = transfer_mode;
+}
+
+EMMC_ERROR_CODE emmc_send_idle_cmd(uint32_t arg)
+{
+	EMMC_ERROR_CODE result;
+	uint32_t freq;
+
+	/* initialize state */
+	mmc_drv_obj.mount = FALSE;
+	mmc_drv_obj.selected = FALSE;
+	mmc_drv_obj.during_transfer = FALSE;
+	mmc_drv_obj.during_cmd_processing = FALSE;
+	mmc_drv_obj.during_dma_transfer = FALSE;
+	mmc_drv_obj.dma_error_flag = FALSE;
+	mmc_drv_obj.force_terminate = FALSE;
+	mmc_drv_obj.state_machine_blocking = FALSE;
+
+	mmc_drv_obj.bus_width = HAL_MEMCARD_DATA_WIDTH_1_BIT;
+	mmc_drv_obj.max_freq = MMC_20MHZ;	/* 20MHz */
+	mmc_drv_obj.current_state = EMMC_R1_STATE_IDLE;
+
+	/* CMD0 (MMC clock is current frequency. if Data transfer mode, 20MHz or higher.) */
+	emmc_make_nontrans_cmd(CMD0_GO_IDLE_STATE, arg);	/* CMD0 */
+	result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
+	if (result != EMMC_SUCCESS) {
+		return result;
+	}
+
+	/* change MMC clock(400KHz) */
+	freq = MMC_400KHZ;
+	result = emmc_set_request_mmc_clock(&freq);
+	if (result != EMMC_SUCCESS) {
+		return result;
+	}
+
+	return EMMC_SUCCESS;
+}

drivers/renesas/rcar/iic_dvfs/iic_dvfs.h

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef IIC_DVFS_H__
+#define IIC_DVFS_H__
+
+/* PMIC slave */
+#define PMIC			(0x30)
+#define	BKUP_MODE_CNT		(0x20)
+#define	DVFS_SET_VID		(0x54)
+#define	REG_KEEP10		(0x79)
+
+/* EEPROM slave */
+#define EEPROM			(0x50)
+#define	BOARD_ID		(0x70)
+
+int32_t rcar_iic_dvfs_receive(uint8_t slave, uint8_t reg, uint8_t *data);
+int32_t rcar_iic_dvfs_send(uint8_t slave, uint8_t regr, uint8_t data);
+
+#endif

drivers/renesas/rcar/io/io_common.h

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef IO_COMMON_H__
+#define IO_COMMON_H__
+
+typedef struct io_drv_spec {
+	size_t offset;
+	size_t length;
+	uint32_t partition;
+} io_drv_spec_t;
+
+#endif

drivers/renesas/rcar/io/io_emmcdrv.h

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef IO_EMMCDRV_H__
+#define IO_EMMCDRV_H__
+
+struct io_dev_connector;
+int32_t rcar_register_io_dev_emmcdrv(const io_dev_connector_t **connector);
+
+#endif

drivers/renesas/rcar/io/io_memdrv.h

+/*
+ * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef IO_MEMDRV_H__
+#define IO_MEMDRV_H__
+
+struct io_dev_connector;
+int32_t rcar_register_io_dev_memdrv(const io_dev_connector_t **connector);
+
+#endif