OMAP3: Add MMC support

Add MMC support.

Signed-off-by: Dirk Behme <dirk.behme@googlemail.com>

2 files changed, 559 insertions, 0 deletions

diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 3dc031b..bb0d52e 100644
--- a/drivers/mmc/Makefile
+++ b/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)
diff --git a/drivers/mmc/omap3_mmc.c b/drivers/mmc/omap3_mmc.c
new file mode 100644
index 0000000..0148702
--- /dev/null
+++ b/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;
+}