ENGR00116472-1 U-BOOT upgrade to V2009.08

U-BOOT upgrade from V2009.01 to V2009.08
Initial version for i.MX51 BBG board.
Support:
 FEC, SPI, spi Nor Flash
 Boot from spi nor flash and mmc/sd

Signed-off-by:Fred Fan <r01011@freescale.com>

1 files changed, 58 insertions, 590 deletions

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index fab39eb..c6e9e6e 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -1,5 +1,6 @@
 /*
- * Copyright 2008-2009 Freescale Semiconductor, Inc.
+ * Copyright 2007, Freescale Semiconductor, Inc
+ * Andy Fleming
  *
  * Based vaguely on the pxa mmc code:
  * (C) Copyright 2003
@@ -24,18 +25,7 @@
  * MA 02111-1307 USA
  */
 
-/*!
- * @file esdhc.c
- *
- * @brief source code for the mmc card operation
- *
- * @ingroup mmc
- */
-
 #include <config.h>
-#include <asm/arch/sdhc.h>
-#include <linux/mmc/sdhci.h>
-#include <asm/errno.h>
 #include <common.h>
 #include <command.h>
 #include <hwconfig.h>
@@ -45,9 +35,9 @@
 #include <mmc.h>
 #include <fsl_esdhc.h>
 #include <fdt_support.h>
-#include <linux/types.h>
 #include <asm/io.h>
 
+
 DECLARE_GLOBAL_DATA_PTR;
 
 struct fsl_esdhc {
@@ -77,41 +67,6 @@ struct fsl_esdhc {
 	uint	scr;
 };
 
-#define RETRIES_TIMES 100
-
-#define REG_WRITE_OR(val, reg) { \
-		u32 temp = 0; \
-		temp = readl(reg); \
-		(temp) |= (val); \
-		writel((temp), (reg)); \
-		}
-
-#define REG_WRITE_AND(val, reg) { \
-		u32 temp = 0; \
-		temp = readl(reg); \
-		(temp) &= (val); \
-		writel((temp), (reg)); \
-		}
-
-#define SDHC_DELAY_BY_100(x) { \
-		u32 i; \
-		for (i = 0; i < x; ++i) \
-			udelay(100); \
-		}
-
-extern volatile u32 esdhc_base_pointer;
-
-static void esdhc_cmd_config(esdhc_cmd_t *);
-static u32 esdhc_check_response(void);
-static u32 esdhc_wait_buf_rdy_intr(u32, u32);
-static void esdhc_wait_op_done_intr(void);
-static u32 esdhc_check_data(void);
-static void esdhc_set_data_transfer_width(u32 data_transfer_width);
-static u32 esdhc_poll_cihb_cdihb(data_present_select data_present);
-static void esdhc_set_endianness(u32 endian_mode);
-static void esdhc_clear_buf_rdy_intr(u32 mask);
-static u32 esdhc_check_data_crc_status(void);
-
 /* Return the XFERTYP flags for a given command and data packet */
 uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
 {
@@ -119,9 +74,12 @@ uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
 
 	if (data) {
 		xfertyp |= XFERTYP_DPSEL | XFERTYP_DMAEN;
+
 		if (data->blocks > 1) {
 			xfertyp |= XFERTYP_MSBSEL;
 			xfertyp |= XFERTYP_BCEN;
+		}
+
 		if (data->flags & MMC_DATA_READ)
 			xfertyp |= XFERTYP_DTDSEL;
 	}
@@ -140,30 +98,20 @@ uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
 	return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
 }
 
-/*!
- * Send 80 SD clock to card and wait for INITA bit to get cleared.
- */
-void interface_initialization_active(void)
-{
-	/* Send 80 clock ticks for card to power up */
-	REG_WRITE_OR(ESDHC_SYSCTL_INITA, \
-			esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-
-	/* Start a general purpose timer */
-	udelay(ESDHC_CARD_INIT_TIMEOUT);
-}
-
 static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
 {
 	uint wml_value;
 	int timeout;
 	struct fsl_esdhc *regs = mmc->priv;
+
 	wml_value = data->blocksize/4;
 
 	if (data->flags & MMC_DATA_READ) {
 		if (wml_value > 0x10)
 			wml_value = 0x10;
+
 		wml_value = 0x100000 | wml_value;
+
 		out_be32(&regs->dsaddr, (u32)data->dest);
 	} else {
 		if (wml_value > 0x80)
@@ -177,127 +125,24 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
 	}
 
 	out_be32(&regs->wml, wml_value);
+
 	out_be32(&regs->blkattr, data->blocks << 16 | data->blocksize);
+
 	/* Calculate the timeout period for data transactions */
 	timeout = __ilog2(mmc->tran_speed/10);
 	timeout -= 13;
+
 	if (timeout > 14)
 		timeout = 14;
+
 	if (timeout < 0)
 		timeout = 0;
-	clrsetbits_be32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
-	return 0;
-}
-
-/*!
- * Execute a software reset and set data bus width for eSDHC.
- */
-u32 interface_reset(void)
-{
-	u32 reset_status = 0;
-	u32 u32Retries = 0;
-	u32 u32Temp = 0;
-
-	debug("Entry: interface_reset");
-
-	/* Reset the entire host controller by writing
-	1 to RSTA bit of SYSCTRL Register */
-	REG_WRITE_OR(ESDHC_SOFTWARE_RESET, \
-			esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-
-	/* Start a general purpose timer (3 millsec delay) */
-	/* udelay(ESDHC_OPER_TIMEOUT); */
-
-	/* Wait for clearance of CIHB and CDIHB Bits */
-	for (u32Retries = RETRIES_TIMES; u32Retries > 0; --u32Retries) {
-		if (readl(esdhc_base_pointer + SDHCI_SYSTEM_CONTROL) \
-					& ESDHC_SOFTWARE_RESET) {
-			reset_status = 1;
-		} else {
-			reset_status = 0;
-			break;
-		}
-	}
-
-	/* Set data bus width of ESDCH */
-	esdhc_set_data_transfer_width(0x00000000);
-	/* Set Endianness of ESDHC */
-	esdhc_set_endianness(0x00000020);
-
-	/* set data timeout delay to max */
-	u32Temp = (readl(esdhc_base_pointer + SDHCI_SYSTEM_CONTROL) & \
-						0xfff0ffff) | 0x000e0000;
-	writel(u32Temp, esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
 
-	return reset_status;
-}
+	clrsetbits_be32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
 
-/*!
- * Clear interrupts at eSDHC level.
- */
-void interface_clear_interrupt(void)
-{
-	/* Clear Interrupt status register */
-	writel(ESDHC_CLEAR_INTERRUPT, esdhc_base_pointer + SDHCI_INT_STATUS);
+	return 0;
 }
 
-/*!
- * Enable Clock and set operating frequency.
- */
-void interface_configure_clock(sdhc_freq_t frequency)
-{
-	u32 ident_freq = 0;
-	u32 oper_freq  = 0;
-
-	/* Clear SDCLKEN bit */
-	REG_WRITE_OR((~ESDHC_SYSCTL_SDCLKEN_MASK), \
-		esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-
-	/* Clear DTOCV, SDCLKFS, DVFS bits */
-	REG_WRITE_OR((~ESDHC_SYSCTL_FREQ_MASK), \
-		esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-	ident_freq = ESDHC_SYSCTL_IDENT_FREQ_TO2;
-	oper_freq  = ESDHC_SYSCTL_OPERT_FREQ_TO2;
-
-	/* Disable the PEREN, HCKEN and IPGEN */
-	REG_WRITE_OR((~ESDHC_SYSCTL_INPUT_CLOCK_MASK), \
-			esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-
-	if (frequency == IDENTIFICATION_FREQ) {
-		/* Input frequecy to eSDHC is 36 MHZ */
-		/* PLL3 is the source of input frequency*/
-		/*Set DTOCV and SDCLKFS bit to get SD_CLK
-		of frequency below 400 KHZ (70.31 KHZ) */
-		REG_WRITE_OR(ident_freq, \
-			esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-	} else if (frequency == OPERATING_FREQ) {
-		/*Set DTOCV and SDCLKFS bit to get SD_CLK
-		of frequency around 25 MHz.(18 MHz)*/
-		REG_WRITE_OR(oper_freq, \
-			esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-	}
-
-	/* Start a general purpose timer */
-	/* Wait for clock to be stable */
-	SDHC_DELAY_BY_100(96);
-
-	/* Set SDCLKEN bit to enable clock */
-	REG_WRITE_OR(ESDHC_SYSCTL_SDCLKEN_MASK, \
-		esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-
-	/* Mask Data Timeout Error Status Enable Interrupt (DTOESEN) */
-	REG_WRITE_AND((~ESDHC_IRQSTATEN_DTOESEN), \
-			esdhc_base_pointer + SDHCI_INT_ENABLE);
-
-	/* Set the Data Timeout Counter Value(DTOCV) */
-	REG_WRITE_OR(ESDHC_SYSCTL_DTOCV_VAL, \
-		esdhc_base_pointer + SDHCI_SYSTEM_CONTROL);
-
-	/* Enable Data Timeout Error Status
-		Enable Interrupt (DTOESEN) */
-	REG_WRITE_OR(ESDHC_IRQSTATEN_DTOESEN, \
-			esdhc_base_pointer + SDHCI_INT_ENABLE);
-}
 
 /*
  * Sends a command out on the bus.  Takes the mmc pointer,
@@ -309,18 +154,24 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 	uint	xfertyp;
 	uint	irqstat;
 	volatile struct fsl_esdhc *regs = mmc->priv;
+
 	out_be32(&regs->irqstat, -1);
+
 	sync();
+
 	/* Wait for the bus to be idle */
 	while ((in_be32(&regs->prsstat) & PRSSTAT_CICHB) ||
 			(in_be32(&regs->prsstat) & PRSSTAT_CIDHB));
+
 	while (in_be32(&regs->prsstat) & PRSSTAT_DLA);
+
 	/* Wait at least 8 SD clock cycles before the next command */
 	/*
 	 * Note: This is way more than 8 cycles, but 1ms seems to
 	 * resolve timing issues with some cards
 	 */
 	udelay(1000);
+
 	/* Set up for a data transfer if we have one */
 	if (data) {
 		int err;
@@ -329,23 +180,30 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 		if(err)
 			return err;
 	}
+
 	/* Figure out the transfer arguments */
 	xfertyp = esdhc_xfertyp(cmd, data);
+
 	/* Send the command */
 	out_be32(&regs->cmdarg, cmd->cmdarg);
 	out_be32(&regs->xfertyp, xfertyp);
+
 	/* Wait for the command to complete */
 	while (!(in_be32(&regs->irqstat) & IRQSTAT_CC));
 
 	irqstat = in_be32(&regs->irqstat);
 	out_be32(&regs->irqstat, irqstat);
+
 	if (irqstat & CMD_ERR)
 		return COMM_ERR;
+
 	if (irqstat & IRQSTAT_CTOE)
 		return TIMEOUT;
+
 	/* Copy the response to the response buffer */
 	if (cmd->resp_type & MMC_RSP_136) {
 		u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
+
 		cmdrsp3 = in_be32(&regs->cmdrsp3);
 		cmdrsp2 = in_be32(&regs->cmdrsp2);
 		cmdrsp1 = in_be32(&regs->cmdrsp1);
@@ -356,12 +214,15 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 		cmd->response[3] = (cmdrsp0 << 8);
 	} else
 		cmd->response[0] = in_be32(&regs->cmdrsp0);
+
 	/* Wait until all of the blocks are transferred */
 	if (data) {
 		do {
 			irqstat = in_be32(&regs->irqstat);
+
 			if (irqstat & DATA_ERR)
 				return COMM_ERR;
+
 			if (irqstat & IRQSTAT_DTOE)
 				return TIMEOUT;
 		} while (!(irqstat & IRQSTAT_TC) &&
@@ -369,128 +230,10 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 	}
 
 	out_be32(&regs->irqstat, -1);
-	return 0;
-}
-
-/*!
- * Set data transfer width for e-SDHC.
- */
-static void esdhc_set_data_transfer_width(u32 data_transfer_width)
-{
-	/* Set DWT bit of protocol control register according to bus_width */
-	REG_WRITE_AND((~ESDHC_BUS_WIDTH_MASK), \
-			esdhc_base_pointer + SDHCI_HOST_CONTROL);
-
-	REG_WRITE_OR((data_transfer_width), \
-			esdhc_base_pointer + SDHCI_HOST_CONTROL);
-}
-
-/*!
- * Set endianness mode for e-SDHC.
- */
-static void esdhc_set_endianness(u32 endian_mode)
-{
-	REG_WRITE_AND((~ESDHC_ENDIAN_MODE_MASK), \
-		esdhc_base_pointer + SDHCI_HOST_CONTROL);
-	/* Set DWT bit of protocol control register according to bus_width */
-	REG_WRITE_OR((endian_mode), \
-			esdhc_base_pointer + SDHCI_HOST_CONTROL);
-}
-
-/*!
- * Poll the CIHB & CDIHB bits of the present
- * state register and wait until it goes low.
- */
-static u32 esdhc_poll_cihb_cdihb(data_present_select data_present)
-{
-	u32 init_status = 0;
-	u32 u32Retries = 0;
-
-	/* Start a general purpose timer */
-	for (u32Retries = RETRIES_TIMES; u32Retries > 0; u32Retries--) {
-		if (!(readl(esdhc_base_pointer + SDHCI_PRESENT_STATE) & \
-					ESDHC_PRESENT_STATE_CIHB)) {
-			init_status = 0;
-			break;
-		}
-		SDHC_DELAY_BY_100(10);
-	}
-
-	/*
-	 * Wait for the data line to be free (poll the CDIHB bit of
-	 * the present state register).
-	 */
-	if ((0 == init_status) && (data_present == DATA_PRESENT)) {
-		/* Start a general purpose timer */
-		SDHC_DELAY_BY_100(32);
-
-		if (readl(esdhc_base_pointer + SDHCI_PRESENT_STATE) & \
-			ESDHC_PRESENT_STATE_CDIHB) {
-			init_status =  1;
-		}
-	}
-
-	return init_status;
-}
-
-/*!
- * Wait until the command and data lines are free.
- */
-u32 interface_wait_cmd_data_lines(data_present_select data_present)
-{
-	u32 cmd_status = 0;
-
-	cmd_status = esdhc_poll_cihb_cdihb(data_present);
-
-	return cmd_status;
-}
-
-u32 interface_set_bus_width(u32 bus_width)
-{
-	u32 tmp;
-
-	tmp = readl(esdhc_base_pointer + SDHCI_HOST_CONTROL);
-	tmp &= ~SDHCI_CTRL_8BITBUS;
-	tmp |= SDHCI_CTRL_4BITBUS;
-
-	writel(tmp, esdhc_base_pointer + SDHCI_HOST_CONTROL);
 
 	return 0;
 }
 
-/*!
- * Execute a command and wait for the response.
- */
-u32 interface_send_cmd_wait_resp(esdhc_cmd_t *cmd)
-{
-	u32 cmd_status = 0;
-
-	/* Clear Interrupt status register */
-	writel(ESDHC_CLEAR_INTERRUPT, \
-			esdhc_base_pointer + SDHCI_INT_STATUS);
-
-	/* Enable Interrupt */
-	REG_WRITE_OR(ESDHC_INTERRUPT_ENABLE, \
-			esdhc_base_pointer + SDHCI_INT_ENABLE);
-
-	cmd_status = interface_wait_cmd_data_lines(cmd->data_present);
-
-	if (cmd_status == 1)
-		return 1;
-
-	/* Configure Command */
-	esdhc_cmd_config(cmd);
-
-	/* Wait for interrupt CTOE or CC */
-	SDHC_DELAY_BY_100(96);
-
-	/* Mask all interrupts */
-	writel(0, esdhc_base_pointer + SDHCI_SIGNAL_ENABLE);
-
-	/* Check if an error occured */
-	return esdhc_check_response();
-}
-
 void set_sysctl(struct mmc *mmc, uint clock)
 {
 	int sdhc_clk = gd->sdhc_clk;
@@ -504,176 +247,39 @@ void set_sysctl(struct mmc *mmc, uint clock)
 				break;
 	} else
 		pre_div = 2;
+
 	for (div = 1; div <= 16; div++)
 		if ((sdhc_clk / (div * pre_div)) <= clock)
 			break;
+
 	pre_div >>= 1;
 	div -= 1;
-	clk = (pre_div << 8) | (div << 4);
-	clrsetbits_be32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
-	udelay(10000);
-	setbits_be32(&regs->sysctl, SYSCTL_PEREN);
-}
 
-/*!
- * Configure ESDHC registers for sending a command to MMC.
- */
-static void esdhc_cmd_config(esdhc_cmd_t *cmd)
-{
-	u32 u32Temp = 0;
-
-	/* Write Command Argument in Command Argument Register */
-	writel(cmd->arg, esdhc_base_pointer + SDHCI_ARGUMENT);
-
-	/*
-	*Configure e-SDHC Register value according to Command
-	*/
-	u32Temp = \
-		(((cmd->data_transfer)<<ESDHC_DATA_TRANSFER_SHIFT) |
-		((cmd->response_format)<<ESDHC_RESPONSE_FORMAT_SHIFT) |
-		((cmd->data_present)<<ESDHC_DATA_PRESENT_SHIFT) |
-		((cmd->crc_check) << ESDHC_CRC_CHECK_SHIFT) |
-		((cmd->cmdindex_check) << ESDHC_CMD_INDEX_CHECK_SHIFT) |
-		((cmd->command) << ESDHC_CMD_INDEX_SHIFT) |
-		((cmd->block_count_enable_check) << \
-			ESDHC_BLOCK_COUNT_ENABLE_SHIFT) |
-		((cmd->multi_single_block) << \
-			ESDHC_MULTI_SINGLE_BLOCK_SELECT_SHIFT));
-
-	writel(u32Temp, esdhc_base_pointer + SDHCI_TRANSFER_MODE);
-}
-
-/*!
- * Wait a END_CMD_RESP interrupt by interrupt status register.
- * e-SDHC sets this bit after receving command response.
- */
-static u32 esdhc_check_response(void)
-{
-	u32 status = 1;
-
-	/* Check whether the interrupt is an END_CMD_RESP
-	* or a response time out or a CRC error
-	*/
-	if ((readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_END_CMD_RESP_MSK) &&
-		!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_TIME_OUT_RESP_MSK) &&
-		!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_RESP_CRC_ERR_MSK) &&
-		!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_RESP_CMD_INDEX_ERR_MSK))
-		status = 0;
-
-	return status;
-}
-
-/*!
- * This function will read response from e-SDHC
- * register according to reponse format.
- */
-void interface_read_response(esdhc_resp_t *cmd_resp)
-{
-	/* get response values from e-SDHC CMDRSP registers.*/
-	cmd_resp->cmd_rsp0 = (u32)readl(esdhc_base_pointer + SDHCI_RESPONSE);
-	cmd_resp->cmd_rsp1 = (u32)readl(esdhc_base_pointer + \
-							SDHCI_RESPONSE + 4);
-	cmd_resp->cmd_rsp2 = (u32)readl(esdhc_base_pointer + \
-							SDHCI_RESPONSE + 8);
-	cmd_resp->cmd_rsp3 = (u32)readl(esdhc_base_pointer + \
-							SDHCI_RESPONSE + 12);
-}
-
-/*!
- * This function will read response from e-SDHC register
- * according to reponse format.
- */
-u32 interface_data_read(u32 *dest_ptr, u32 blk_len)
-{
-	u32 i = 0;
-	u32 j = 0;
-	u32 status = 1;
-	u32 *tmp_ptr = dest_ptr;
-
-	debug("Entry: interface_data_read()\n");
-
-	/* Enable Interrupt */
-	REG_WRITE_OR(ESDHC_INTERRUPT_ENABLE, \
-			esdhc_base_pointer + SDHCI_INT_ENABLE);
-
-	for (i = 0; i < (blk_len) / (ESDHC_FIFO_SIZE * 4); ++i) {
-		/* Wait for BRR bit to be set */
-		status = esdhc_wait_buf_rdy_intr(ESDHC_STATUS_BUF_READ_RDY_MSK,
-						 ESDHC_READ_DATA_TIME_OUT);
-
-		debug("esdhc_wait_buf_rdy_intr: %d\n", status);
-
-		if (!status) {
-			for (j = 0; j < ESDHC_FIFO_SIZE; ++j) {
-				*tmp_ptr++ = \
-				readl(esdhc_base_pointer + SDHCI_BUFFER);
-			}
-			/* Clear the BRR */
-			esdhc_clear_buf_rdy_intr(ESDHC_STATUS_BUF_READ_RDY_MSK);
-		} else {
-			debug("esdhc_wait_buf_rdy_intr failed\n");
-			break;
-		}
-	}
-
-	esdhc_wait_op_done_intr();
-
-	status = esdhc_check_data();
+	clk = (pre_div << 8) | (div << 4);
 
-	if (!status)
-		status = 0;
+	clrsetbits_be32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
 
-	debug("esdhc_check_data: %d\n", status);
-	debug("Exit: interface_data_read()\n");
+	udelay(10000);
 
-	return status;
+	setbits_be32(&regs->sysctl, SYSCTL_PEREN);
 }
 
 static void esdhc_set_ios(struct mmc *mmc)
 {
 	struct fsl_esdhc *regs = mmc->priv;
+
 	/* Set the clock speed */
 	set_sysctl(mmc, mmc->clock);
+
 	/* Set the bus width */
 	clrbits_be32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
+
 	if (mmc->bus_width == 4)
 		setbits_be32(&regs->proctl, PROCTL_DTW_4);
 	else if (mmc->bus_width == 8)
 		setbits_be32(&regs->proctl, PROCTL_DTW_8);
 }
 
-/*!
- * Wait a BUF_READ_READY  interrupt by pooling STATUS register.
- */
-static u32 esdhc_wait_buf_rdy_intr(u32 mask, u32 multi_single_block)
-{
-	u32 status = 0;
-	u32 u32Retries = 0;
-
-	/* Wait interrupt (BUF_READ_RDY)
-	*/
-
-	for (u32Retries = RETRIES_TIMES; u32Retries > 0; --u32Retries) {
-		if (!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & mask)) {
-			status = 1;
-		} else {
-			status = 0;
-			break;
-		}
-		SDHC_DELAY_BY_100(10);
-	}
-
-	if (multi_single_block == MULTIPLE && \
-		readl(esdhc_base_pointer + SDHCI_INT_STATUS) & mask)
-		REG_WRITE_OR(mask, (esdhc_base_pointer + SDHCI_INT_STATUS));
-
-	return status;
-}
-
 static int esdhc_init(struct mmc *mmc)
 {
 	struct fsl_esdhc *regs = mmc->priv;
@@ -681,90 +287,25 @@ static int esdhc_init(struct mmc *mmc)
 
 	/* Enable cache snooping */
 	out_be32(&regs->scr, 0x00000040);
+
 	out_be32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
+
 	/* Set the initial clock speed */
 	set_sysctl(mmc, 400000);
+
 	/* Disable the BRR and BWR bits in IRQSTAT */
 	clrbits_be32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
+
 	/* Put the PROCTL reg back to the default */
 	out_be32(&regs->proctl, PROCTL_INIT);
+
 	while (!(in_be32(&regs->prsstat) & PRSSTAT_CINS) && --timeout)
 		udelay(1000);
+
 	if (timeout <= 0)
 		return NO_CARD_ERR;
-	return 0;
-}
-/*!
- * Clear BUF_READ_READY/BUF_WRITE_READY interrupt
- * by writing 1 to STATUS register.
- */
-static void esdhc_clear_buf_rdy_intr(u32 mask)
-{
-	writel(mask, (esdhc_base_pointer + SDHCI_INT_STATUS));
-}
-
-/*!
- * Wait for TC, DEBE, DCE or DTOE by polling Interrupt STATUS register.
- */
-static void esdhc_wait_op_done_intr(void)
-{
-	while (!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-			ESDHC_STATUS_TRANSFER_COMPLETE_MSK))
-	;
-}
-
-/*!
- * If READ_OP_DONE occured check ESDHC_STATUS_TIME_OUT_READ
- * and RD_CRC_ERR_CODE and
- * to determine if an error occured
- */
-static u32 esdhc_check_data(void)
-{
-	u32 status = 1;
-
-	debug("Entry: esdhc_check_data()\n");
-
-	/* Check whether the interrupt is an OP_DONE
-	* or a data time out or a CRC error
-	*/
-	if ((readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_TRANSFER_COMPLETE_MSK) &&
-		!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_TIME_OUT_READ_MASK) &&
-		!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_READ_CRC_ERR_MSK)) {
-		writel(ESDHC_STATUS_TRANSFER_COMPLETE_MSK, \
-			(esdhc_base_pointer + SDHCI_INT_STATUS));
-		status = 0;
-	} else {
-		status = 1;
-	}
-
-	debug("Exit: esdhc_check_data()\n");
-	return status;
-}
 
-/*!
- * Check for Data timeout error, data CRC error and data end bit error
- * to determine if an error occured.
- */
-static u32 esdhc_check_data_crc_status(void)
-{
-	u32 status = 1;
-
-	/* Check whether the interrupt is DTOE/DCE/DEBE */
-	if (!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_TIME_OUT_READ_MASK) &&
-		!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_READ_CRC_ERR_MSK) &&
-		!(readl(esdhc_base_pointer + SDHCI_INT_STATUS) & \
-		ESDHC_STATUS_RW_DATA_END_BIT_ERR_MSK)) {
-		status = 0;
-	} else {
-		status = 1;
-	}
-
-	return status;
+	return 0;
 }
 
 static int esdhc_initialize(bd_t *bis)
@@ -772,75 +313,35 @@ static int esdhc_initialize(bd_t *bis)
 	struct fsl_esdhc *regs = (struct fsl_esdhc *)CONFIG_SYS_FSL_ESDHC_ADDR;
 	struct mmc *mmc;
 	u32 caps;
+
 	mmc = malloc(sizeof(struct mmc));
+
 	sprintf(mmc->name, "FSL_ESDHC");
 	mmc->priv = regs;
 	mmc->send_cmd = esdhc_send_cmd;
 	mmc->set_ios = esdhc_set_ios;
 	mmc->init = esdhc_init;
+
 	caps = regs->hostcapblt;
+
 	if (caps & ESDHC_HOSTCAPBLT_VS18)
 		mmc->voltages |= MMC_VDD_165_195;
 	if (caps & ESDHC_HOSTCAPBLT_VS30)
 		mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
 	if (caps & ESDHC_HOSTCAPBLT_VS33)
 		mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
+
 	mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
+
 	if (caps & ESDHC_HOSTCAPBLT_HSS)
 		mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
+
 	mmc->f_min = 400000;
 	mmc->f_max = MIN(gd->sdhc_clk, 50000000);
-	mmc_register(mmc);
-	return 0;
-}
-
-/*!
- * Set Block length.
- */
-void interface_config_block_info(u32 blk_len, u32 nob, u32 wml)
-{
-	/* Configre block Attributes register */
-	writel(((nob << ESDHC_BLOCK_SHIFT) | blk_len), \
-			(esdhc_base_pointer + SDHCI_BLOCK_SIZE));
-	/* Set Read Water MArk Level register */
-	writel(wml, esdhc_base_pointer + SDHCI_WML_LEV);
-}
 
-/*!
- * This function will write data to device  attached to interface.
- */
-u32 interface_data_write(u32 *dest_ptr, u32 blk_len)
-{
-	u32 i = 0;
-	u32 j = 0;
-	u32 status = 1;
-	u32 *tmp_ptr = dest_ptr;
-
-	debug("Entry: interface_data_write()\n");
-
-	/* Enable Interrupt */
-	REG_WRITE_OR(ESDHC_INTERRUPT_ENABLE, \
-			(esdhc_base_pointer + SDHCI_INT_ENABLE));
-
-	for (i = 0; i < (blk_len) / (ESDHC_FIFO_SIZE * 4); ++i) {
-		/* Wait for BWR bit to be set */
-		esdhc_wait_buf_rdy_intr(ESDHC_STATUS_BUF_WRITE_RDY_MSK, \
-						SINGLE);
-		for (j = 0; j < ESDHC_FIFO_SIZE; ++j) {
-			writel((*tmp_ptr), esdhc_base_pointer + SDHCI_BUFFER);
-			++tmp_ptr;
-		}
-		esdhc_clear_buf_rdy_intr(ESDHC_STATUS_BUF_WRITE_RDY_MSK);
-	}
-
-	/* Wait for transfer complete operation interrupt */
-	esdhc_wait_op_done_intr();
-
-	/* Check for status errors */
-	status = esdhc_check_data();
+	mmc_register(mmc);
 
-	debug("Exit: interface_data_write()\n");
-	return status;
+	return 0;
 }
 
 int fsl_esdhc_mmc_init(bd_t *bis)
@@ -852,48 +353,15 @@ void fdt_fixup_esdhc(void *blob, bd_t *bd)
 {
 	const char *compat = "fsl,esdhc";
 	const char *status = "okay";
+
 	if (!hwconfig("esdhc")) {
 		status = "disabled";
 		goto out;
 	}
+
 	do_fixup_by_compat_u32(blob, compat, "clock-frequency",
 			       gd->sdhc_clk, 1);
 out:
 	do_fixup_by_compat(blob, compat, "status", status,
 			   strlen(status) + 1, 1);
 }
-
-/*!
- * Configure the CMD line PAD configuration for strong or weak pull-up.
- */
-/*
-void esdhc_set_cmd_pullup(esdhc_pullup_t pull_up)
-{
-	u32 interface_esdhc = 0;
-	u32 pad_val = 0;
-
-	interface_esdhc = (readl(0x53ff080c)) & (0x000000C0) >> 6;
-
-	if (pull_up == STRONG) {
-		pad_val = PAD_CTL_PUE_PUD | PAD_CTL_PKE_ENABLE |
-			PAD_CTL_HYS_SCHMITZ | PAD_CTL_DRV_HIGH |
-			PAD_CTL_22K_PU | PAD_CTL_SRE_FAST;
-	} else {
-		pad_val = PAD_CTL_PUE_PUD | PAD_CTL_PKE_ENABLE |
-			PAD_CTL_HYS_SCHMITZ | PAD_CTL_DRV_MAX |
-			PAD_CTL_100K_PU | PAD_CTL_SRE_FAST;
-	}
-
-	switch (interface_esdhc) {
-	case ESDHC1:
-		mxc_iomux_set_pad(MX51_PIN_SD1_CMD, pad_val);
-		break;
-	case ESDHC2:
-		mxc_iomux_set_pad(MX51_PIN_SD2_CMD, pad_val);
-		break;
-	case ESDHC3:
-	default:
-		break;
-	}
-}
-*/