x-loader/cpu/omap3/mmc.c - nest-learning-thermostat/5.5/x-loader - Git at Google

 /*
  * (C) Copyright 2008
  * Texas Instruments, <www.ti.com>
  * Syed Mohammed Khasim <khasim@ti.com>
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation's version 2 of
  * the License.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */


 #include <config.h>
 #include <common.h>
 #include <mmc.h>
 #include <part.h>

 #ifdef CFG_CMD_MMC

 #include "mmc_host_def.h"
 #include "mmc_protocol.h"

 #define OMAP_MMC_MASTER_CLOCK   96000000
 extern int fat_register_device(block_dev_desc_t *dev_desc, int part_no);

 mmc_card_data cur_card_data;
 static block_dev_desc_t mmc_blk_dev;

 block_dev_desc_t *mmc_get_dev(int dev)
 {
 	return ((block_dev_desc_t *) &mmc_blk_dev);
 }

 unsigned char mmc_board_init(void)
 {
 #if defined (CONFIG_OMAP34XX) && !defined (CONFIG_AM3517EVM)
 	unsigned int value = 0;

 	value = CONTROL_PBIAS_LITE;
 	CONTROL_PBIAS_LITE = value | (1 << 2) | (1 << 1) | (1 << 9);

 	value = CONTROL_DEV_CONF0;
 	CONTROL_DEV_CONF0 = value | (1 << 24);
 #endif
 	return 1;
 }

 void mmc_init_stream(void)
 {
 	volatile unsigned int mmc_stat;

 	OMAP_HSMMC_CON |= INIT_INITSTREAM;

 	OMAP_HSMMC_CMD = MMC_CMD0;
 	do {
 		mmc_stat = OMAP_HSMMC_STAT;
 	} while (!(mmc_stat & CC_MASK));

 	OMAP_HSMMC_STAT = CC_MASK;

 	OMAP_HSMMC_CMD = MMC_CMD0;
 	do {
 		mmc_stat = OMAP_HSMMC_STAT;
 	} while (!(mmc_stat & CC_MASK));

 	OMAP_HSMMC_STAT = OMAP_HSMMC_STAT;
 	OMAP_HSMMC_CON &= ~INIT_INITSTREAM;
 }

 unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div)
 {
 	unsigned int val;

 	mmc_reg_out(OMAP_HSMMC_SYSCTL, (ICE_MASK | DTO_MASK | CEN_MASK),
 		    (ICE_STOP | DTO_15THDTO | CEN_DISABLE));

 	switch (iclk) {
 	case CLK_INITSEQ:
 		val = MMC_INIT_SEQ_CLK / 2;
 		break;
 	case CLK_400KHZ:
 		val = MMC_400kHz_CLK;
 		break;
 	case CLK_MISC:
 		val = clk_div;
 		break;
 	default:
 		return 0;
 	}
 	mmc_reg_out(OMAP_HSMMC_SYSCTL,
 		    ICE_MASK | CLKD_MASK, (val << CLKD_OFFSET) | ICE_OSCILLATE);

 	while ((OMAP_HSMMC_SYSCTL & ICS_MASK) == ICS_NOTREADY);


 	OMAP_HSMMC_SYSCTL |= CEN_ENABLE;
 	return 1;
 }

 unsigned char mmc_init_setup(void)
 {
 	unsigned int reg_val;

 	mmc_board_init();

 	OMAP_HSMMC_SYSCONFIG |= MMC_SOFTRESET;
 	while ((OMAP_HSMMC_SYSSTATUS & RESETDONE) == 0) ;

 	OMAP_HSMMC_SYSCTL |= SOFTRESETALL;
 	while ((OMAP_HSMMC_SYSCTL & SOFTRESETALL) != 0x0) ;

 	OMAP_HSMMC_HCTL = DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0;
 	OMAP_HSMMC_CAPA |= VS30_3V0SUP | VS18_1V8SUP;

 	reg_val = OMAP_HSMMC_CON & RESERVED_MASK;

 	OMAP_HSMMC_CON = CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH |
 	    CDP_ACTIVEHIGH | MIT_CTO | DW8_1_4BITMODE | MODE_FUNC |
 	    STR_BLOCK | HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN;

 	mmc_clock_config(CLK_INITSEQ, 0);
 	OMAP_HSMMC_HCTL |= SDBP_PWRON;

 	OMAP_HSMMC_IE = 0x307f0033;

 	mmc_init_stream();
 	return 1;
 }

 unsigned char mmc_send_cmd(unsigned int cmd, unsigned int arg,
 			   unsigned int *response)
 {
 	unsigned int mmc_stat;

 	while ((OMAP_HSMMC_PSTATE & DATI_MASK) == DATI_CMDDIS);


 	OMAP_HSMMC_BLK = BLEN_512BYTESLEN | NBLK_STPCNT;
 	OMAP_HSMMC_STAT = 0xFFFFFFFF;
 	OMAP_HSMMC_ARG = arg;
 	OMAP_HSMMC_CMD = cmd | CMD_TYPE_NORMAL | CICE_NOCHECK |
 	    CCCE_NOCHECK | MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE |
 	    DE_DISABLE;

 	while (1) {
 		do {
 			mmc_stat = OMAP_HSMMC_STAT;
 		} while (mmc_stat == 0);

 		if ((mmc_stat & ERRI_MASK) != 0)
 			return (unsigned char)mmc_stat;


 		if (mmc_stat & CC_MASK) {
 			OMAP_HSMMC_STAT = CC_MASK;
 			response[0] = OMAP_HSMMC_RSP10;
 			if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) {
 				response[1] = OMAP_HSMMC_RSP32;
 				response[2] = OMAP_HSMMC_RSP54;
 				response[3] = OMAP_HSMMC_RSP76;
 			}
 			break;
 		}
 	}
 	return 1;
 }

 unsigned char mmc_read_data(unsigned int *output_buf)
 {
 	unsigned int mmc_stat;
 	unsigned int read_count = 0;

 	/*
 	 * Start Polled Read
 	 */
 	while (1) {
 		do {
 			mmc_stat = OMAP_HSMMC_STAT;
 		} while (mmc_stat == 0);

 		if ((mmc_stat & ERRI_MASK) != 0)
 			return (unsigned char)mmc_stat;

 		if (mmc_stat & BRR_MASK) {
 			unsigned int k;

 			OMAP_HSMMC_STAT |= BRR_MASK;
 			for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) {
 				*output_buf = OMAP_HSMMC_DATA;
 				output_buf++;
 				read_count += 4;
 			}
 		}

 		if (mmc_stat & BWR_MASK)
 			OMAP_HSMMC_STAT |= BWR_MASK;

 		if (mmc_stat & TC_MASK) {
 			OMAP_HSMMC_STAT |= TC_MASK;
 			break;
 		}
 	}
 	return 1;
 }

 unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur)
 {
 	unsigned char err;
 	unsigned int argument = 0;
 	unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val;
 	unsigned int resp[4];
 	unsigned short retry_cnt = 2000;

 	/* Set to Initialization Clock */
 	err = mmc_clock_config(CLK_400KHZ, 0);
 	if (err != 1)
 		return err;

 	mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS;
 	argument = 0x00000000;

 	ocr_value = (0x1FF << 15);
 	err = mmc_send_cmd(MMC_CMD0, argument, resp);
 	if (err != 1)
 		return err;

 	argument = SD_CMD8_CHECK_PATTERN | SD_CMD8_2_7_3_6_V_RANGE;
 	err = mmc_send_cmd(MMC_SDCMD8, argument, resp);
 	hcs_val = (err == 1) ?
 	    MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR :
 	    MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE;

 	argument = 0x0000 << 16;
 	err = mmc_send_cmd(MMC_CMD55, argument, resp);
 	if (err == 1) {
 		mmc_card_cur->card_type = SD_CARD;
 		ocr_value |= hcs_val;
 		ret_cmd41 = MMC_ACMD41;
 	} else {
 		mmc_card_cur->card_type = MMC_CARD;
 		ocr_value |= MMC_OCR_REG_ACCESS_MODE_SECTOR;
 		ret_cmd41 = MMC_CMD1;
 		OMAP_HSMMC_CON &= ~OD;
 		OMAP_HSMMC_CON |= OPENDRAIN;
 	}

 	argument = ocr_value;
 	err = mmc_send_cmd(ret_cmd41, argument, resp);
 	if (err != 1)
 		return err;

 	ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;

 	while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) {
 		retry_cnt--;
 		if (mmc_card_cur->card_type == SD_CARD) {
 			argument = 0x0000 << 16;
 			err = mmc_send_cmd(MMC_CMD55, argument, resp);
 		}

 		argument = ocr_value;
 		err = mmc_send_cmd(ret_cmd41, argument, resp);
 		if (err != 1)
 			return err;
 		ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 	}

 	if (!(ocr_recvd & (0x1 << 31)))
 		return 0;

 	if (mmc_card_cur->card_type == MMC_CARD) {
 		if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) ==
 		    MMC_OCR_REG_ACCESS_MODE_SECTOR) {
 			mmc_card_cur->mode = SECTOR_MODE;
 		} else {
 			mmc_card_cur->mode = BYTE_MODE;
 		}

 		ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK;
 	} else {
 		if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK)
 		    == MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) {
 			mmc_card_cur->mode = SECTOR_MODE;
 		} else {
 			mmc_card_cur->mode = BYTE_MODE;
 		}
 		ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK;
 	}

 	ocr_recvd &= ~(0x1 << 31);
 	if (!(ocr_recvd & ocr_value))
 		return 0;

 	err = mmc_send_cmd(MMC_CMD2, argument, resp);
 	if (err != 1)
 		return err;

 	if (mmc_card_cur->card_type == MMC_CARD) {
 		argument = mmc_card_cur->RCA << 16;
 		err = mmc_send_cmd(MMC_CMD3, argument, resp);
 		if (err != 1)
 			return err;
 	} else {
 		argument = 0x00000000;
 		err = mmc_send_cmd(MMC_SDCMD3, argument, resp);
 		if (err != 1)
 			return err;

 		mmc_card_cur->RCA = ((mmc_resp_r6 *) resp)->newpublishedrca;
 	}

 	OMAP_HSMMC_CON &= ~OD;
 	OMAP_HSMMC_CON |= NOOPENDRAIN;
 	return 1;
 }

 unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data,
 				mmc_csd_reg_t *cur_csd)
 {
 	mmc_extended_csd_reg_t ext_csd;
 	unsigned int size, count, blk_len, blk_no, card_size, argument;
 	unsigned char err;
 	unsigned int resp[4];

 	if (mmc_dev_data->mode == SECTOR_MODE) {
 		if (mmc_dev_data->card_type == SD_CARD) {
 			card_size =
 			    (((mmc_sd2_csd_reg_t *) cur_csd)->
 			     c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) |
 			    ((((mmc_sd2_csd_reg_t *) cur_csd)->
 			      c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK)
 			     << MMC_SD2_CSD_C_SIZE_MSB_OFFSET);
 			mmc_dev_data->size = card_size * 1024;
 			if (mmc_dev_data->size == 0)
 				return 0;
 		} else {
 			argument = 0x00000000;
 			err = mmc_send_cmd(MMC_CMD8, argument, resp);
 			if (err != 1)
 				return err;
 			err = mmc_read_data((unsigned int *)&ext_csd);
 			if (err != 1)
 				return err;
 			mmc_dev_data->size = ext_csd.sectorcount;

 			if (mmc_dev_data->size == 0)
 				mmc_dev_data->size = 8388608;
 		}
 	} else {
 		if (cur_csd->c_size_mult >= 8)
 			return 0;

 		if (cur_csd->read_bl_len >= 12)
 			return 0;

 		/* Compute size */
 		count = 1 << (cur_csd->c_size_mult + 2);
 		card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) |
 		    ((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK)
 		     << MMC_CSD_C_SIZE_MSB_OFFSET);

 		blk_no = (card_size + 1) * count;
 		blk_len = 1 << cur_csd->read_bl_len;
 		size = blk_no * blk_len;

 		mmc_dev_data->size = size / MMCSD_SECTOR_SIZE;
 		if (mmc_dev_data->size == 0)
 			return 0;
 	}
 	return 1;
 }

 unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes,
 				 mmc_card_data *mmc_c,
 				 unsigned int *output_buf)
 {
 	unsigned char err;
 	unsigned int argument;
 	unsigned int resp[4];
 	unsigned int num_sec_val =
 	    (num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE;
 	unsigned int sec_inc_val;

 	if (num_sec_val == 0)
 		return 1;

 	if (mmc_c->mode == SECTOR_MODE) {
 		argument = start_sec;
 		sec_inc_val = 1;
 	} else {
 		argument = start_sec * MMCSD_SECTOR_SIZE;
 		sec_inc_val = MMCSD_SECTOR_SIZE;
 	}

 	while (num_sec_val) {
 		err = mmc_send_cmd(MMC_CMD17, argument, resp);
 		if (err != 1)
 			return err;


 		err = mmc_read_data(output_buf);
 		if (err != 1)
 			return err;

 		output_buf += (MMCSD_SECTOR_SIZE / 4);
 		argument += sec_inc_val;
 		num_sec_val--;
 	}
 	return 1;
 }

 unsigned char configure_mmc(mmc_card_data *mmc_card_cur)
 {
 	unsigned char ret_val;
 	unsigned int argument;
 	unsigned int resp[4];
 	unsigned int trans_fact, trans_unit, retries = 2;
 	unsigned int max_dtr;
 	int dsor;
 	volatile mmc_csd_reg_t Card_CSD;
 	unsigned char trans_speed;

 	mmc_init_setup();

 	do {
 		ret_val = mmc_detect_card(mmc_card_cur);
 		retries--;
 	} while ((retries > 0) && (ret_val != 1));

 	argument = mmc_card_cur->RCA << 16;
 	ret_val = mmc_send_cmd(MMC_CMD9, argument, resp);
 	if (ret_val != 1)
 		return ret_val;

 	((unsigned int *)&Card_CSD)[3] = resp[3];
 	((unsigned int *)&Card_CSD)[2] = resp[2];
 	((unsigned int *)&Card_CSD)[1] = resp[1];
 	((unsigned int *)&Card_CSD)[0] = resp[0];

 	if (mmc_card_cur->card_type == MMC_CARD)
 		mmc_card_cur->version = Card_CSD.spec_vers;

 	trans_speed = Card_CSD.tran_speed;

 	ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, resp);
 	if (ret_val != 1)
 		return ret_val;

 	trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK;
 	trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK;

 	if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ)
 		return 0;

 	if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) ||
 	    (trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0))
 		return 0;

 	trans_unit >>= 0;
 	trans_fact >>= 3;

 	max_dtr = tran_exp[trans_unit] * tran_mant[trans_fact];
 	dsor = OMAP_MMC_MASTER_CLOCK / max_dtr;

 	if (dsor == 4)
 		dsor = 5;
 	if (dsor == 3)
 		dsor = 4;

 	ret_val = mmc_clock_config(CLK_MISC, dsor);
 	if (ret_val != 1)
 		return ret_val;

 	argument = mmc_card_cur->RCA << 16;
 	ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, resp);
 	if (ret_val != 1)
 		return ret_val;

 	/* Configure the block length to 512 bytes */
 	argument = MMCSD_SECTOR_SIZE;
 	ret_val = mmc_send_cmd(MMC_CMD16, argument, resp);
 	if (ret_val != 1)
 		return ret_val;

 	/* get the card size in sectors */
 	ret_val = mmc_read_cardsize(mmc_card_cur, (mmc_csd_reg_t *)&Card_CSD);
 	if (ret_val != 1)
 		return ret_val;

 	return 1;
 }

 unsigned long mmc_bread(int dev_num, ulong blknr, ulong blkcnt, ulong *dst)
 {
 	unsigned long ret;
 	ret = omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE),
 			&cur_card_data, (unsigned int *)dst);
 	return ret;
 }

 int mmc_init(int verbose)
 {
 	unsigned char ret = 0;

 	ret = configure_mmc(&cur_card_data);
 	if (ret == 0)
 		return 0;

 	mmc_blk_dev.if_type = IF_TYPE_MMC;
 	mmc_blk_dev.part_type = PART_TYPE_DOS;
 	mmc_blk_dev.dev = 0;
 	mmc_blk_dev.lun = 0;
 	mmc_blk_dev.type = 0;

 	/* FIXME fill in the correct size (is set to 32MByte) */
 	mmc_blk_dev.blksz = MMCSD_SECTOR_SIZE;
 	mmc_blk_dev.lba = 0x10000;
 	mmc_blk_dev.removable = 0;
 	mmc_blk_dev.block_read = mmc_bread;

 	fat_register_device(&mmc_blk_dev, 1);

 	return 1;
 }

 int mmc_read(unsigned int src, unsigned char *dst, int size)
 {
 	/*
 	 * NOT Implemented
 	 */
 	return 0;
 }
 int mmc_write(unsigned char *src, unsigned long dst, int size)
 {
 	/*
 	 * NOT Implemented
 	 */
 	return 0;
 }

 int mmc2info(unsigned int addr)
 {
 	/*
 	 * NOT Implemented
 	 */
 	return 0;
 }
 #endif
	/*
	* (C) Copyright 2008
	* Texas Instruments, <www.ti.com>
	* Syed Mohammed Khasim <khasim@ti.com>
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation's version 2 of
	* the License.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/


	#include <config.h>
	#include <common.h>
	#include <mmc.h>
	#include <part.h>

	#ifdef CFG_CMD_MMC

	#include "mmc_host_def.h"
	#include "mmc_protocol.h"

	#define OMAP_MMC_MASTER_CLOCK 96000000
	extern int fat_register_device(block_dev_desc_t *dev_desc, int part_no);

	mmc_card_data cur_card_data;
	static block_dev_desc_t mmc_blk_dev;

	block_dev_desc_t *mmc_get_dev(int dev)
	{
	return ((block_dev_desc_t *) &mmc_blk_dev);
	}

	unsigned char mmc_board_init(void)
	{
	#if defined (CONFIG_OMAP34XX) && !defined (CONFIG_AM3517EVM)
	unsigned int value = 0;

	value = CONTROL_PBIAS_LITE;
	CONTROL_PBIAS_LITE = value \| (1 << 2) \| (1 << 1) \| (1 << 9);

	value = CONTROL_DEV_CONF0;
	CONTROL_DEV_CONF0 = value \| (1 << 24);
	#endif
	return 1;
	}

	void mmc_init_stream(void)
	{
	volatile unsigned int mmc_stat;

	OMAP_HSMMC_CON \|= INIT_INITSTREAM;

	OMAP_HSMMC_CMD = MMC_CMD0;
	do {
	mmc_stat = OMAP_HSMMC_STAT;
	} while (!(mmc_stat & CC_MASK));

	OMAP_HSMMC_STAT = CC_MASK;

	OMAP_HSMMC_CMD = MMC_CMD0;
	do {
	mmc_stat = OMAP_HSMMC_STAT;
	} while (!(mmc_stat & CC_MASK));

	OMAP_HSMMC_STAT = OMAP_HSMMC_STAT;
	OMAP_HSMMC_CON &= ~INIT_INITSTREAM;
	}

	unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div)
	{
	unsigned int val;

	mmc_reg_out(OMAP_HSMMC_SYSCTL, (ICE_MASK \| DTO_MASK \| CEN_MASK),
	(ICE_STOP \| DTO_15THDTO \| CEN_DISABLE));

	switch (iclk) {
	case CLK_INITSEQ:
	val = MMC_INIT_SEQ_CLK / 2;
	break;
	case CLK_400KHZ:
	val = MMC_400kHz_CLK;
	break;
	case CLK_MISC:
	val = clk_div;
	break;
	default:
	return 0;
	}
	mmc_reg_out(OMAP_HSMMC_SYSCTL,
	ICE_MASK \| CLKD_MASK, (val << CLKD_OFFSET) \| ICE_OSCILLATE);

	while ((OMAP_HSMMC_SYSCTL & ICS_MASK) == ICS_NOTREADY);


	OMAP_HSMMC_SYSCTL \|= CEN_ENABLE;
	return 1;
	}

	unsigned char mmc_init_setup(void)
	{
	unsigned int reg_val;

	mmc_board_init();

	OMAP_HSMMC_SYSCONFIG \|= MMC_SOFTRESET;
	while ((OMAP_HSMMC_SYSSTATUS & RESETDONE) == 0) ;

	OMAP_HSMMC_SYSCTL \|= SOFTRESETALL;
	while ((OMAP_HSMMC_SYSCTL & SOFTRESETALL) != 0x0) ;

	OMAP_HSMMC_HCTL = DTW_1_BITMODE \| SDBP_PWROFF \| SDVS_3V0;
	OMAP_HSMMC_CAPA \|= VS30_3V0SUP \| VS18_1V8SUP;

	reg_val = OMAP_HSMMC_CON & RESERVED_MASK;

	OMAP_HSMMC_CON = CTPL_MMC_SD \| reg_val \| WPP_ACTIVEHIGH \|
	CDP_ACTIVEHIGH \| MIT_CTO \| DW8_1_4BITMODE \| MODE_FUNC \|
	STR_BLOCK \| HR_NOHOSTRESP \| INIT_NOINIT \| NOOPENDRAIN;

	mmc_clock_config(CLK_INITSEQ, 0);
	OMAP_HSMMC_HCTL \|= SDBP_PWRON;

	OMAP_HSMMC_IE = 0x307f0033;

	mmc_init_stream();
	return 1;
	}

	unsigned char mmc_send_cmd(unsigned int cmd, unsigned int arg,
	unsigned int *response)
	{
	unsigned int mmc_stat;

	while ((OMAP_HSMMC_PSTATE & DATI_MASK) == DATI_CMDDIS);


	OMAP_HSMMC_BLK = BLEN_512BYTESLEN \| NBLK_STPCNT;
	OMAP_HSMMC_STAT = 0xFFFFFFFF;
	OMAP_HSMMC_ARG = arg;
	OMAP_HSMMC_CMD = cmd \| CMD_TYPE_NORMAL \| CICE_NOCHECK \|
	CCCE_NOCHECK \| MSBS_SGLEBLK \| ACEN_DISABLE \| BCE_DISABLE \|
	DE_DISABLE;

	while (1) {
	do {
	mmc_stat = OMAP_HSMMC_STAT;
	} while (mmc_stat == 0);

	if ((mmc_stat & ERRI_MASK) != 0)
	return (unsigned char)mmc_stat;


	if (mmc_stat & CC_MASK) {
	OMAP_HSMMC_STAT = CC_MASK;
	response[0] = OMAP_HSMMC_RSP10;
	if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) {
	response[1] = OMAP_HSMMC_RSP32;
	response[2] = OMAP_HSMMC_RSP54;
	response[3] = OMAP_HSMMC_RSP76;
	}
	break;
	}
	}
	return 1;
	}

	unsigned char mmc_read_data(unsigned int *output_buf)
	{
	unsigned int mmc_stat;
	unsigned int read_count = 0;

	/*
	* Start Polled Read
	*/
	while (1) {
	do {
	mmc_stat = OMAP_HSMMC_STAT;
	} while (mmc_stat == 0);

	if ((mmc_stat & ERRI_MASK) != 0)
	return (unsigned char)mmc_stat;

	if (mmc_stat & BRR_MASK) {
	unsigned int k;

	OMAP_HSMMC_STAT \|= BRR_MASK;
	for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) {
	*output_buf = OMAP_HSMMC_DATA;
	output_buf++;
	read_count += 4;
	}
	}

	if (mmc_stat & BWR_MASK)
	OMAP_HSMMC_STAT \|= BWR_MASK;

	if (mmc_stat & TC_MASK) {
	OMAP_HSMMC_STAT \|= TC_MASK;
	break;
	}
	}
	return 1;
	}

	unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur)
	{
	unsigned char err;
	unsigned int argument = 0;
	unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val;
	unsigned int resp[4];
	unsigned short retry_cnt = 2000;

	/* Set to Initialization Clock */
	err = mmc_clock_config(CLK_400KHZ, 0);
	if (err != 1)
	return err;

	mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS;
	argument = 0x00000000;

	ocr_value = (0x1FF << 15);
	err = mmc_send_cmd(MMC_CMD0, argument, resp);
	if (err != 1)
	return err;

	argument = SD_CMD8_CHECK_PATTERN \| SD_CMD8_2_7_3_6_V_RANGE;
	err = mmc_send_cmd(MMC_SDCMD8, argument, resp);
	hcs_val = (err == 1) ?
	MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR :
	MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE;

	argument = 0x0000 << 16;
	err = mmc_send_cmd(MMC_CMD55, argument, resp);
	if (err == 1) {
	mmc_card_cur->card_type = SD_CARD;
	ocr_value \|= hcs_val;
	ret_cmd41 = MMC_ACMD41;
	} else {
	mmc_card_cur->card_type = MMC_CARD;
	ocr_value \|= MMC_OCR_REG_ACCESS_MODE_SECTOR;
	ret_cmd41 = MMC_CMD1;
	OMAP_HSMMC_CON &= ~OD;
	OMAP_HSMMC_CON \|= OPENDRAIN;
	}

	argument = ocr_value;
	err = mmc_send_cmd(ret_cmd41, argument, resp);
	if (err != 1)
	return err;

	ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;

	while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) {
	retry_cnt--;
	if (mmc_card_cur->card_type == SD_CARD) {
	argument = 0x0000 << 16;
	err = mmc_send_cmd(MMC_CMD55, argument, resp);
	}

	argument = ocr_value;
	err = mmc_send_cmd(ret_cmd41, argument, resp);
	if (err != 1)
	return err;
	ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
	}

	if (!(ocr_recvd & (0x1 << 31)))
	return 0;

	if (mmc_card_cur->card_type == MMC_CARD) {
	if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) ==
	MMC_OCR_REG_ACCESS_MODE_SECTOR) {
	mmc_card_cur->mode = SECTOR_MODE;
	} else {
	mmc_card_cur->mode = BYTE_MODE;
	}

	ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK;
	} else {
	if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK)
	== MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) {
	mmc_card_cur->mode = SECTOR_MODE;
	} else {
	mmc_card_cur->mode = BYTE_MODE;
	}
	ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK;
	}

	ocr_recvd &= ~(0x1 << 31);
	if (!(ocr_recvd & ocr_value))
	return 0;

	err = mmc_send_cmd(MMC_CMD2, argument, resp);
	if (err != 1)
	return err;

	if (mmc_card_cur->card_type == MMC_CARD) {
	argument = mmc_card_cur->RCA << 16;
	err = mmc_send_cmd(MMC_CMD3, argument, resp);
	if (err != 1)
	return err;
	} else {
	argument = 0x00000000;
	err = mmc_send_cmd(MMC_SDCMD3, argument, resp);
	if (err != 1)
	return err;

	mmc_card_cur->RCA = ((mmc_resp_r6 *) resp)->newpublishedrca;
	}

	OMAP_HSMMC_CON &= ~OD;
	OMAP_HSMMC_CON \|= NOOPENDRAIN;
	return 1;
	}

	unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data,
	mmc_csd_reg_t *cur_csd)
	{
	mmc_extended_csd_reg_t ext_csd;
	unsigned int size, count, blk_len, blk_no, card_size, argument;
	unsigned char err;
	unsigned int resp[4];

	if (mmc_dev_data->mode == SECTOR_MODE) {
	if (mmc_dev_data->card_type == SD_CARD) {
	card_size =
	(((mmc_sd2_csd_reg_t *) cur_csd)->
	c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) \|
	((((mmc_sd2_csd_reg_t *) cur_csd)->
	c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK)
	<< MMC_SD2_CSD_C_SIZE_MSB_OFFSET);
	mmc_dev_data->size = card_size * 1024;
	if (mmc_dev_data->size == 0)
	return 0;
	} else {
	argument = 0x00000000;
	err = mmc_send_cmd(MMC_CMD8, argument, resp);
	if (err != 1)
	return err;
	err = mmc_read_data((unsigned int *)&ext_csd);
	if (err != 1)
	return err;
	mmc_dev_data->size = ext_csd.sectorcount;

	if (mmc_dev_data->size == 0)
	mmc_dev_data->size = 8388608;
	}
	} else {
	if (cur_csd->c_size_mult >= 8)
	return 0;

	if (cur_csd->read_bl_len >= 12)
	return 0;

	/* Compute size */
	count = 1 << (cur_csd->c_size_mult + 2);
	card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) \|
	((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK)
	<< MMC_CSD_C_SIZE_MSB_OFFSET);

	blk_no = (card_size + 1) * count;
	blk_len = 1 << cur_csd->read_bl_len;
	size = blk_no * blk_len;

	mmc_dev_data->size = size / MMCSD_SECTOR_SIZE;
	if (mmc_dev_data->size == 0)
	return 0;
	}
	return 1;
	}

	unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes,
	mmc_card_data *mmc_c,
	unsigned int *output_buf)
	{
	unsigned char err;
	unsigned int argument;
	unsigned int resp[4];
	unsigned int num_sec_val =
	(num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE;
	unsigned int sec_inc_val;

	if (num_sec_val == 0)
	return 1;

	if (mmc_c->mode == SECTOR_MODE) {
	argument = start_sec;
	sec_inc_val = 1;
	} else {
	argument = start_sec * MMCSD_SECTOR_SIZE;
	sec_inc_val = MMCSD_SECTOR_SIZE;
	}

	while (num_sec_val) {
	err = mmc_send_cmd(MMC_CMD17, argument, resp);
	if (err != 1)
	return err;


	err = mmc_read_data(output_buf);
	if (err != 1)
	return err;

	output_buf += (MMCSD_SECTOR_SIZE / 4);
	argument += sec_inc_val;
	num_sec_val--;
	}
	return 1;
	}

	unsigned char configure_mmc(mmc_card_data *mmc_card_cur)
	{
	unsigned char ret_val;
	unsigned int argument;
	unsigned int resp[4];
	unsigned int trans_fact, trans_unit, retries = 2;
	unsigned int max_dtr;
	int dsor;
	volatile mmc_csd_reg_t Card_CSD;
	unsigned char trans_speed;

	mmc_init_setup();

	do {
	ret_val = mmc_detect_card(mmc_card_cur);
	retries--;
	} while ((retries > 0) && (ret_val != 1));

	argument = mmc_card_cur->RCA << 16;
	ret_val = mmc_send_cmd(MMC_CMD9, argument, resp);
	if (ret_val != 1)
	return ret_val;

	((unsigned int *)&Card_CSD)[3] = resp[3];
	((unsigned int *)&Card_CSD)[2] = resp[2];
	((unsigned int *)&Card_CSD)[1] = resp[1];
	((unsigned int *)&Card_CSD)[0] = resp[0];

	if (mmc_card_cur->card_type == MMC_CARD)
	mmc_card_cur->version = Card_CSD.spec_vers;

	trans_speed = Card_CSD.tran_speed;

	ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, resp);
	if (ret_val != 1)
	return ret_val;

	trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK;
	trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK;

	if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ)
	return 0;

	if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) \|\|
	(trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0))
	return 0;

	trans_unit >>= 0;
	trans_fact >>= 3;

	max_dtr = tran_exp[trans_unit] * tran_mant[trans_fact];
	dsor = OMAP_MMC_MASTER_CLOCK / max_dtr;

	if (dsor == 4)
	dsor = 5;
	if (dsor == 3)
	dsor = 4;

	ret_val = mmc_clock_config(CLK_MISC, dsor);
	if (ret_val != 1)
	return ret_val;

	argument = mmc_card_cur->RCA << 16;
	ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, resp);
	if (ret_val != 1)
	return ret_val;

	/* Configure the block length to 512 bytes */
	argument = MMCSD_SECTOR_SIZE;
	ret_val = mmc_send_cmd(MMC_CMD16, argument, resp);
	if (ret_val != 1)
	return ret_val;

	/* get the card size in sectors */
	ret_val = mmc_read_cardsize(mmc_card_cur, (mmc_csd_reg_t *)&Card_CSD);
	if (ret_val != 1)
	return ret_val;

	return 1;
	}

	unsigned long mmc_bread(int dev_num, ulong blknr, ulong blkcnt, ulong *dst)
	{
	unsigned long ret;
	ret = omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE),
	&cur_card_data, (unsigned int *)dst);
	return ret;
	}

	int mmc_init(int verbose)
	{
	unsigned char ret = 0;

	ret = configure_mmc(&cur_card_data);
	if (ret == 0)
	return 0;

	mmc_blk_dev.if_type = IF_TYPE_MMC;
	mmc_blk_dev.part_type = PART_TYPE_DOS;
	mmc_blk_dev.dev = 0;
	mmc_blk_dev.lun = 0;
	mmc_blk_dev.type = 0;

	/* FIXME fill in the correct size (is set to 32MByte) */
	mmc_blk_dev.blksz = MMCSD_SECTOR_SIZE;
	mmc_blk_dev.lba = 0x10000;
	mmc_blk_dev.removable = 0;
	mmc_blk_dev.block_read = mmc_bread;

	fat_register_device(&mmc_blk_dev, 1);

	return 1;
	}

	int mmc_read(unsigned int src, unsigned char *dst, int size)
	{
	/*
	* NOT Implemented
	*/
	return 0;
	}
	int mmc_write(unsigned char *src, unsigned long dst, int size)
	{
	/*
	* NOT Implemented
	*/
	return 0;
	}

	int mmc2info(unsigned int addr)
	{
	/*
	* NOT Implemented
	*/
	return 0;
	}
	#endif