Merge branch 'master' of git://git.denx.de/u-boot-arm

drivers/i2c/Makefile

@@ -30,6 +30,7 @@ COBJS-$(CONFIG_FSL_I2C) += fsl_i2c.o
 COBJS-$(CONFIG_I2C_MXC) += mxc_i2c.o
 COBJS-$(CONFIG_DRIVER_OMAP1510_I2C) += omap1510_i2c.o
 COBJS-$(CONFIG_DRIVER_OMAP24XX_I2C) += omap24xx_i2c.o
+COBJS-$(CONFIG_DRIVER_OMAP34XX_I2C) += omap24xx_i2c.o
 COBJS-$(CONFIG_SOFT_I2C) += soft_i2c.o
 COBJS-$(CONFIG_TSI108_I2C) += tsi108_i2c.o
 

drivers/i2c/omap24xx_i2c.c

@@ -109,7 +109,11 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
 
 		status = wait_for_pin ();
 		if (status & I2C_STAT_RRDY) {
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+			*value = readb (I2C_DATA);
+#else
 			*value = readw (I2C_DATA);
+#endif
 			udelay (20000);
 		} else {
 			i2c_error = 1;
@@ -150,8 +154,23 @@ static int i2c_write_byte (u8 devaddr, u8 regoffset, u8 value)
 	status = wait_for_pin ();
 
 	if (status & I2C_STAT_XRDY) {
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+		/* send out 1 byte */
+		writeb (regoffset, I2C_DATA);
+		writew (I2C_STAT_XRDY, I2C_STAT);
+
+		status = wait_for_pin ();
+		if ((status & I2C_STAT_XRDY)) {
+			/* send out next 1 byte */
+			writeb (value, I2C_DATA);
+			writew (I2C_STAT_XRDY, I2C_STAT);
+		} else {
+			i2c_error = 1;
+		}
+#else
 		/* send out two bytes */
 		writew ((value << 8) + regoffset, I2C_DATA);
+#endif
 		/* must have enough delay to allow BB bit to go low */
 		udelay (50000);
 		if (readw (I2C_STAT) & I2C_STAT_NACK) {
@@ -188,7 +207,11 @@ static void flush_fifo(void)
 	while(1){
 		stat = readw(I2C_STAT);
 		if(stat == I2C_STAT_RRDY){
+#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX)
+			readb(I2C_DATA);
+#else
 			readw(I2C_DATA);
+#endif
 			writew(I2C_STAT_RRDY,I2C_STAT);
 			udelay(1000);
 		}else

drivers/mmc/Makefile

@@ -26,6 +26,7 @@ include $(TOPDIR)/config.mk
 LIB	:= $(obj)libmmc.a
 
 COBJS-$(CONFIG_ATMEL_MCI) += atmel_mci.o
+COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)

drivers/mmc/omap3_mmc.c

@@ -0,0 +1,558 @@
+/*
+ * (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 <fat.h>
+#include <mmc.h>
+#include <part.h>
+#include <i2c.h>
+
+const unsigned short mmc_transspeed_val[15][4] = {
+	{CLKD(10, 1), CLKD(10, 10), CLKD(10, 100), CLKD(10, 1000)},
+	{CLKD(12, 1), CLKD(12, 10), CLKD(12, 100), CLKD(12, 1000)},
+	{CLKD(13, 1), CLKD(13, 10), CLKD(13, 100), CLKD(13, 1000)},
+	{CLKD(15, 1), CLKD(15, 10), CLKD(15, 100), CLKD(15, 1000)},
+	{CLKD(20, 1), CLKD(20, 10), CLKD(20, 100), CLKD(20, 1000)},
+	{CLKD(26, 1), CLKD(26, 10), CLKD(26, 100), CLKD(26, 1000)},
+	{CLKD(30, 1), CLKD(30, 10), CLKD(30, 100), CLKD(30, 1000)},
+	{CLKD(35, 1), CLKD(35, 10), CLKD(35, 100), CLKD(35, 1000)},
+	{CLKD(40, 1), CLKD(40, 10), CLKD(40, 100), CLKD(40, 1000)},
+	{CLKD(45, 1), CLKD(45, 10), CLKD(45, 100), CLKD(45, 1000)},
+	{CLKD(52, 1), CLKD(52, 10), CLKD(52, 100), CLKD(52, 1000)},
+	{CLKD(55, 1), CLKD(55, 10), CLKD(55, 100), CLKD(55, 1000)},
+	{CLKD(60, 1), CLKD(60, 10), CLKD(60, 100), CLKD(60, 1000)},
+	{CLKD(70, 1), CLKD(70, 10), CLKD(70, 100), CLKD(70, 1000)},
+	{CLKD(80, 1), CLKD(80, 10), CLKD(80, 100), CLKD(80, 1000)}
+};
+
+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;
+}
+
+void twl4030_mmc_config(void)
+{
+	unsigned char data;
+
+	data = 0x20;
+	i2c_write(0x4B, 0x82, 1, &data, 1);
+	data = 0x2;
+	i2c_write(0x4B, 0x85, 1, &data, 1);
+}
+
+unsigned char mmc_board_init(void)
+{
+	unsigned int value = 0;
+
+	twl4030_mmc_config();
+
+	value = CONTROL_PBIAS_LITE;
+	CONTROL_PBIAS_LITE = value | (1 << 2) | (1 << 1) | (1 << 9);
+
+	value = CONTROL_DEV_CONF0;
+	CONTROL_DEV_CONF0 = value | (1 << 24);
+
+	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)
+{
+	volatile 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)
+{
+	volatile 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 long *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((unsigned int *) 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_clk, trans_fact, trans_unit, retries = 2;
+	mmc_csd_reg_t Card_CSD;
+	unsigned char trans_speed;
+
+	ret_val = mmc_init_setup();
+
+	if (ret_val != 1)
+		return ret_val;
+
+	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;
+
+	trans_clk = mmc_transspeed_val[trans_fact - 1][trans_unit] * 2;
+	ret_val = mmc_clock_config(CLK_MISC, trans_clk);
+
+	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, &Card_CSD);
+	if (ret_val != 1)
+		return ret_val;
+
+	return 1;
+}
+unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt,
+			void *dst)
+{
+	omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE), &cur_card_data,
+			   (unsigned long *) dst);
+	return 1;
+}
+
+int mmc_init(int verbose)
+{
+	if (configure_mmc(&cur_card_data) != 1)
+		return 1;
+
+	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 0;
+}
+
+int mmc_read(ulong src, uchar *dst, int size)
+{
+	return 0;
+}
+
+int mmc_write(uchar *src, ulong dst, int size)
+{
+	return 0;
+}
+
+int mmc2info(ulong addr)
+{
+	return 0;
+}

drivers/mtd/nand/Makefile

@@ -38,6 +38,7 @@ endif
 COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_nand.o
 COBJS-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o
 COBJS-$(CONFIG_NAND_S3C64XX) += s3c64xx.o
+COBJS-$(CONFIG_NAND_OMAP_GPMC) += omap_gpmc.o
 endif
 
 COBJS	:= $(COBJS-y)

drivers/mtd/nand/omap_gpmc.c

@@ -0,0 +1,353 @@
+/*
+ * (C) Copyright 2004-2008 Texas Instruments, <www.ti.com>
+ * Rohit Choraria <rohitkc@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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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 <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/arch/mem.h>
+#include <asm/arch/omap_gpmc.h>
+#include <linux/mtd/nand_ecc.h>
+#include <nand.h>
+
+static uint8_t cs;
+static gpmc_t *gpmc_base = (gpmc_t *)GPMC_BASE;
+static gpmc_csx_t *gpmc_cs_base;
+static struct nand_ecclayout hw_nand_oob = GPMC_NAND_HW_ECC_LAYOUT;
+
+/*
+ * omap_nand_hwcontrol - Set the address pointers corretly for the
+ *			following address/data/command operation
+ */
+static void omap_nand_hwcontrol(struct mtd_info *mtd, int32_t cmd,
+				uint32_t ctrl)
+{
+	register struct nand_chip *this = mtd->priv;
+
+	/*
+	 * Point the IO_ADDR to DATA and ADDRESS registers instead
+	 * of chip address
+	 */
+	switch (ctrl) {
+	case NAND_CTRL_CHANGE | NAND_CTRL_CLE:
+		this->IO_ADDR_W = (void __iomem *)&gpmc_cs_base->nand_cmd;
+		break;
+	case NAND_CTRL_CHANGE | NAND_CTRL_ALE:
+		this->IO_ADDR_W = (void __iomem *)&gpmc_cs_base->nand_adr;
+		break;
+	case NAND_CTRL_CHANGE | NAND_NCE:
+		this->IO_ADDR_W = (void __iomem *)&gpmc_cs_base->nand_dat;
+		break;
+	}
+
+	if (cmd != NAND_CMD_NONE)
+		writeb(cmd, this->IO_ADDR_W);
+}
+
+/*
+ * omap_hwecc_init - Initialize the Hardware ECC for NAND flash in
+ *                   GPMC controller
+ * @mtd:        MTD device structure
+ *
+ */
+static void omap_hwecc_init(struct nand_chip *chip)
+{
+	/*
+	 * Init ECC Control Register
+	 * Clear all ECC | Enable Reg1
+	 */
+	writel(ECCCLEAR | ECCRESULTREG1, &gpmc_base->ecc_control);
+	writel(ECCSIZE1 | ECCSIZE0 | ECCSIZE0SEL, &gpmc_base->ecc_size_config);
+}
+
+/*
+ * gen_true_ecc - This function will generate true ECC value, which
+ * can be used when correcting data read from NAND flash memory core
+ *
+ * @ecc_buf:	buffer to store ecc code
+ *
+ * @return:	re-formatted ECC value
+ */
+static uint32_t gen_true_ecc(uint8_t *ecc_buf)
+{
+	return ecc_buf[0] | (ecc_buf[1] << 16) | ((ecc_buf[2] & 0xF0) << 20) |
+		((ecc_buf[2] & 0x0F) << 8);
+}
+
+/*
+ * omap_correct_data - Compares the ecc read from nand spare area with ECC
+ * registers values and corrects one bit error if it has occured
+ * Further details can be had from OMAP TRM and the following selected links:
+ * http://en.wikipedia.org/wiki/Hamming_code
+ * http://www.cs.utexas.edu/users/plaxton/c/337/05f/slides/ErrorCorrection-4.pdf
+ *
+ * @mtd:		 MTD device structure
+ * @dat:		 page data
+ * @read_ecc:		 ecc read from nand flash
+ * @calc_ecc:		 ecc read from ECC registers
+ *
+ * @return 0 if data is OK or corrected, else returns -1
+ */
+static int omap_correct_data(struct mtd_info *mtd, uint8_t *dat,
+				uint8_t *read_ecc, uint8_t *calc_ecc)
+{
+	uint32_t orig_ecc, new_ecc, res, hm;
+	uint16_t parity_bits, byte;
+	uint8_t bit;
+
+	/* Regenerate the orginal ECC */
+	orig_ecc = gen_true_ecc(read_ecc);
+	new_ecc = gen_true_ecc(calc_ecc);
+	/* Get the XOR of real ecc */
+	res = orig_ecc ^ new_ecc;
+	if (res) {
+		/* Get the hamming width */
+		hm = hweight32(res);
+		/* Single bit errors can be corrected! */
+		if (hm == 12) {
+			/* Correctable data! */
+			parity_bits = res >> 16;
+			bit = (parity_bits & 0x7);
+			byte = (parity_bits >> 3) & 0x1FF;
+			/* Flip the bit to correct */
+			dat[byte] ^= (0x1 << bit);
+		} else if (hm == 1) {
+			printf("Error: Ecc is wrong\n");
+			/* ECC itself is corrupted */
+			return 2;
+		} else {
+			/*
+			 * hm distance != parity pairs OR one, could mean 2 bit
+			 * error OR potentially be on a blank page..
+			 * orig_ecc: contains spare area data from nand flash.
+			 * new_ecc: generated ecc while reading data area.
+			 * Note: if the ecc = 0, all data bits from which it was
+			 * generated are 0xFF.
+			 * The 3 byte(24 bits) ecc is generated per 512byte
+			 * chunk of a page. If orig_ecc(from spare area)
+			 * is 0xFF && new_ecc(computed now from data area)=0x0,
+			 * this means that data area is 0xFF and spare area is
+			 * 0xFF. A sure sign of a erased page!
+			 */
+			if ((orig_ecc == 0x0FFF0FFF) && (new_ecc == 0x00000000))
+				return 0;
+			printf("Error: Bad compare! failed\n");
+			/* detected 2 bit error */
+			return -1;
+		}
+	}
+	return 0;
+}
+
+/*
+ *  omap_calculate_ecc - Generate non-inverted ECC bytes.
+ *
+ *  Using noninverted ECC can be considered ugly since writing a blank
+ *  page ie. padding will clear the ECC bytes. This is no problem as
+ *  long nobody is trying to write data on the seemingly unused page.
+ *  Reading an erased page will produce an ECC mismatch between
+ *  generated and read ECC bytes that has to be dealt with separately.
+ *  E.g. if page is 0xFF (fresh erased), and if HW ECC engine within GPMC
+ *  is used, the result of read will be 0x0 while the ECC offsets of the
+ *  spare area will be 0xFF which will result in an ECC mismatch.
+ *  @mtd:	MTD structure
+ *  @dat:	unused
+ *  @ecc_code:	ecc_code buffer
+ */
+static int omap_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat,
+				uint8_t *ecc_code)
+{
+	u_int32_t val;
+
+	/* Start Reading from HW ECC1_Result = 0x200 */
+	val = readl(&gpmc_base->ecc1_result);
+
+	ecc_code[0] = val & 0xFF;
+	ecc_code[1] = (val >> 16) & 0xFF;
+	ecc_code[2] = ((val >> 8) & 0x0F) | ((val >> 20) & 0xF0);
+
+	/*
+	 * Stop reading anymore ECC vals and clear old results
+	 * enable will be called if more reads are required
+	 */
+	writel(0x000, &gpmc_base->ecc_config);
+
+	return 0;
+}
+
+/*
+ * omap_enable_ecc - This function enables the hardware ecc functionality
+ * @mtd:        MTD device structure
+ * @mode:       Read/Write mode
+ */
+static void omap_enable_hwecc(struct mtd_info *mtd, int32_t mode)
+{
+	struct nand_chip *chip = mtd->priv;
+	uint32_t val, dev_width = (chip->options & NAND_BUSWIDTH_16) >> 1;
+
+	switch (mode) {
+	case NAND_ECC_READ:
+	case NAND_ECC_WRITE:
+		/* Clear the ecc result registers, select ecc reg as 1 */
+		writel(ECCCLEAR | ECCRESULTREG1, &gpmc_base->ecc_control);
+
+		/*
+		 * Size 0 = 0xFF, Size1 is 0xFF - both are 512 bytes
+		 * tell all regs to generate size0 sized regs
+		 * we just have a single ECC engine for all CS
+		 */
+		writel(ECCSIZE1 | ECCSIZE0 | ECCSIZE0SEL,
+			&gpmc_base->ecc_size_config);
+		val = (dev_width << 7) | (cs << 1) | (0x1);
+		writel(val, &gpmc_base->ecc_config);
+		break;
+	default:
+		printf("Error: Unrecognized Mode[%d]!\n", mode);
+		break;
+	}
+}
+
+/*
+ * omap_nand_switch_ecc - switch the ECC operation b/w h/w ecc and s/w ecc.
+ * The default is to come up on s/w ecc
+ *
+ * @hardware - 1 -switch to h/w ecc, 0 - s/w ecc
+ *
+ */
+void omap_nand_switch_ecc(int32_t hardware)
+{
+	struct nand_chip *nand;
+	struct mtd_info *mtd;
+
+	if (nand_curr_device < 0 ||
+	    nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE ||
+	    !nand_info[nand_curr_device].name) {
+		printf("Error: Can't switch ecc, no devices available\n");
+		return;
+	}
+
+	mtd = &nand_info[nand_curr_device];
+	nand = mtd->priv;
+
+	nand->options |= NAND_OWN_BUFFERS;
+
+	/* Reset ecc interface */
+	nand->ecc.read_page = NULL;
+	nand->ecc.write_page = NULL;
+	nand->ecc.read_oob = NULL;
+	nand->ecc.write_oob = NULL;
+	nand->ecc.hwctl = NULL;
+	nand->ecc.correct = NULL;
+	nand->ecc.calculate = NULL;
+
+	/* Setup the ecc configurations again */
+	if (hardware) {
+		nand->ecc.mode = NAND_ECC_HW;
+		nand->ecc.layout = &hw_nand_oob;
+		nand->ecc.size = 512;
+		nand->ecc.bytes = 3;
+		nand->ecc.hwctl = omap_enable_hwecc;
+		nand->ecc.correct = omap_correct_data;
+		nand->ecc.calculate = omap_calculate_ecc;
+		omap_hwecc_init(nand);
+		printf("HW ECC selected\n");
+	} else {
+		nand->ecc.mode = NAND_ECC_SOFT;
+		/* Use mtd default settings */
+		nand->ecc.layout = NULL;
+		printf("SW ECC selected\n");
+	}
+
+	/* Update NAND handling after ECC mode switch */
+	nand_scan_tail(mtd);
+
+	nand->options &= ~NAND_OWN_BUFFERS;
+}
+
+/*
+ * Board-specific NAND initialization. The following members of the
+ * argument are board-specific:
+ * - IO_ADDR_R: address to read the 8 I/O lines of the flash device
+ * - IO_ADDR_W: address to write the 8 I/O lines of the flash device
+ * - cmd_ctrl: hardwarespecific function for accesing control-lines
+ * - waitfunc: hardwarespecific function for accesing device ready/busy line
+ * - ecc.hwctl: function to enable (reset) hardware ecc generator
+ * - ecc.mode: mode of ecc, see defines
+ * - chip_delay: chip dependent delay for transfering data from array to
+ *   read regs (tR)
+ * - options: various chip options. They can partly be set to inform
+ *   nand_scan about special functionality. See the defines for further
+ *   explanation
+ */
+int board_nand_init(struct nand_chip *nand)
+{
+	int32_t gpmc_config = 0;
+	cs = 0;
+
+	/*
+	 * xloader/Uboot's gpmc configuration would have configured GPMC for
+	 * nand type of memory. The following logic scans and latches on to the
+	 * first CS with NAND type memory.
+	 * TBD: need to make this logic generic to handle multiple CS NAND
+	 * devices.
+	 */
+	while (cs < GPMC_MAX_CS) {
+		/*
+		 * Each GPMC set for a single CS is at offset 0x30
+		 * - already remapped for us
+		 */
+		gpmc_cs_base = (gpmc_csx_t *)(GPMC_CONFIG_CS0_BASE +
+				(cs * GPMC_CONFIG_WIDTH));
+		/* Check if NAND type is set */
+		if ((readl(&gpmc_cs_base->config1) & 0xC00) ==
+		     0x800) {
+			/* Found it!! */
+			break;
+		}
+		cs++;
+	}
+	if (cs >= GPMC_MAX_CS) {
+		printf("NAND: Unable to find NAND settings in "
+			"GPMC Configuration - quitting\n");
+		return -ENODEV;
+	}
+
+	gpmc_config = readl(&gpmc_base->config);
+	/* Disable Write protect */
+	gpmc_config |= 0x10;
+	writel(gpmc_config, &gpmc_base->config);
+
+	nand->IO_ADDR_R = (void __iomem *)&gpmc_cs_base->nand_dat;
+	nand->IO_ADDR_W = (void __iomem *)&gpmc_cs_base->nand_cmd;
+
+	nand->cmd_ctrl = omap_nand_hwcontrol;
+	nand->options = NAND_NO_PADDING | NAND_CACHEPRG | NAND_NO_AUTOINCR;
+	/* If we are 16 bit dev, our gpmc config tells us that */
+	if ((readl(gpmc_cs_base) & 0x3000) == 0x1000)
+		nand->options |= NAND_BUSWIDTH_16;
+
+	nand->chip_delay = 100;
+	/* Default ECC mode */
+	nand->ecc.mode = NAND_ECC_SOFT;
+
+	return 0;
+}