[u-boot.git] / cpu / pxa / mmc.c

/*
 * (C) Copyright 2003
 * Kyle Harris, Nexus Technologies, Inc. [email protected]
 *
 * 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 <config.h>
#include <common.h>
#include <mmc.h>
#include <asm/errno.h>
#include <asm/arch/hardware.h>
#include <part.h>

#ifdef CONFIG_MMC

extern int
fat_register_device(block_dev_desc_t *dev_desc, int part_no);

static block_dev_desc_t mmc_dev;

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

/*
 * FIXME needs to read cid and csd info to determine block size
 * and other parameters
 */
static uchar mmc_buf[MMC_BLOCK_SIZE];
static mmc_csd_t mmc_csd;
static int mmc_ready = 0;


static uchar *
/****************************************************/
mmc_cmd(ushort cmd, ushort argh, ushort argl, ushort cmdat)
/****************************************************/
{
	static uchar resp[20];
	ulong status;
	int words, i;

	debug("mmc_cmd %x %x %x %x\n", cmd, argh, argl, cmdat);
	MMC_STRPCL = MMC_STRPCL_STOP_CLK;
	MMC_I_MASK = ~MMC_I_MASK_CLK_IS_OFF;
	while (!(MMC_I_REG & MMC_I_REG_CLK_IS_OFF));
	MMC_CMD    = cmd;
	MMC_ARGH   = argh;
	MMC_ARGL   = argl;
	MMC_CMDAT  = cmdat;
	MMC_I_MASK = ~MMC_I_MASK_END_CMD_RES;
	MMC_STRPCL = MMC_STRPCL_START_CLK;
	while (!(MMC_I_REG & MMC_I_REG_END_CMD_RES));

	status = MMC_STAT;
	debug("MMC status %x\n", status);
	if (status & MMC_STAT_TIME_OUT_RESPONSE)
	{
		return 0;
	}

	switch (cmdat & 0x3)
	{
		case MMC_CMDAT_R1:
		case MMC_CMDAT_R3:
			words = 3;
			break;

		case MMC_CMDAT_R2:
			words = 8;
			break;

		default:
			return 0;
	}
	for (i = words-1; i >= 0; i--)
	{
		ulong res_fifo = MMC_RES;
		int offset = i << 1;

		resp[offset] = ((uchar *)&res_fifo)[0];
		resp[offset+1] = ((uchar *)&res_fifo)[1];
	}
#ifdef MMC_DEBUG
	for (i=0; i<words*2; i += 2)
	{
		printf("MMC resp[%d] = %02x\n", i, resp[i]);
		printf("MMC resp[%d] = %02x\n", i+1, resp[i+1]);
	}
#endif
	return resp;
}

int
/****************************************************/
mmc_block_read(uchar *dst, ulong src, ulong len)
/****************************************************/
{
	uchar *resp;
	ushort argh, argl;
	ulong status;

	if (len == 0)
	{
		return 0;
	}

	debug("mmc_block_rd dst %lx src %lx len %d\n", (ulong)dst, src, len);

	argh = len >> 16;
	argl = len & 0xffff;

	/* set block len */
	resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);

	/* send read command */
	argh = src >> 16;
	argl = src & 0xffff;
	MMC_STRPCL = MMC_STRPCL_STOP_CLK;
	MMC_RDTO = 0xffff;
	MMC_NOB = 1;
	MMC_BLKLEN = len;
	resp = mmc_cmd(MMC_CMD_READ_BLOCK, argh, argl,
			MMC_CMDAT_R1|MMC_CMDAT_READ|MMC_CMDAT_BLOCK|MMC_CMDAT_DATA_EN);


	MMC_I_MASK = ~MMC_I_MASK_RXFIFO_RD_REQ;
	while (len)
	{
		if (MMC_I_REG & MMC_I_REG_RXFIFO_RD_REQ)
		{
			*dst++ = MMC_RXFIFO;
			len--;
		}
		status = MMC_STAT;
		if (status & MMC_STAT_ERRORS)
		{
			printf("MMC_STAT error %lx\n", status);
			return -1;
		}
	}
	MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
	while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
	status = MMC_STAT;
	if (status & MMC_STAT_ERRORS)
	{
		printf("MMC_STAT error %lx\n", status);
		return -1;
	}
	return 0;
}

int
/****************************************************/
mmc_block_write(ulong dst, uchar *src, int len)
/****************************************************/
{
	uchar *resp;
	ushort argh, argl;
	ulong status;

	if (len == 0)
	{
		return 0;
	}

	debug("mmc_block_wr dst %lx src %lx len %d\n", dst, (ulong)src, len);

	argh = len >> 16;
	argl = len & 0xffff;

	/* set block len */
	resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);

	/* send write command */
	argh = dst >> 16;
	argl = dst & 0xffff;
	MMC_STRPCL = MMC_STRPCL_STOP_CLK;
	MMC_NOB = 1;
	MMC_BLKLEN = len;
	resp = mmc_cmd(MMC_CMD_WRITE_BLOCK, argh, argl,
			MMC_CMDAT_R1|MMC_CMDAT_WRITE|MMC_CMDAT_BLOCK|MMC_CMDAT_DATA_EN);

	MMC_I_MASK = ~MMC_I_MASK_TXFIFO_WR_REQ;
	while (len)
	{
		if (MMC_I_REG & MMC_I_REG_TXFIFO_WR_REQ)
		{
			int i, bytes = min(32,len);

			for (i=0; i<bytes; i++)
			{
				MMC_TXFIFO = *src++;
			}
			if (bytes < 32)
			{
				MMC_PRTBUF = MMC_PRTBUF_BUF_PART_FULL;
			}
			len -= bytes;
		}
		status = MMC_STAT;
		if (status & MMC_STAT_ERRORS)
		{
			printf("MMC_STAT error %lx\n", status);
			return -1;
		}
	}
	MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
	while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
	MMC_I_MASK = ~MMC_I_MASK_PRG_DONE;
	while (!(MMC_I_REG & MMC_I_REG_PRG_DONE));
	status = MMC_STAT;
	if (status & MMC_STAT_ERRORS)
	{
		printf("MMC_STAT error %lx\n", status);
		return -1;
	}
	return 0;
}


int
/****************************************************/
mmc_read(ulong src, uchar *dst, int size)
/****************************************************/
{
	ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
	ulong mmc_block_size, mmc_block_address;

	if (size == 0)
	{
		return 0;
	}

	if (!mmc_ready)
	{
		printf("Please initial the MMC first\n");
		return -1;
	}

	mmc_block_size = MMC_BLOCK_SIZE;
	mmc_block_address = ~(mmc_block_size - 1);

	src -= CFG_MMC_BASE;
	end = src + size;
	part_start = ~mmc_block_address & src;
	part_end = ~mmc_block_address & end;
	aligned_start = mmc_block_address & src;
	aligned_end = mmc_block_address & end;

	/* all block aligned accesses */
	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
	if (part_start)
	{
		part_len = mmc_block_size - part_start;
		debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
		src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
		if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0)
		{
			return -1;
		}
		memcpy(dst, mmc_buf+part_start, part_len);
		dst += part_len;
		src += part_len;
	}
	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
	for (; src < aligned_end; src += mmc_block_size, dst += mmc_block_size)
	{
		debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
		src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
		if ((mmc_block_read((uchar *)(dst), src, mmc_block_size)) < 0)
		{
			return -1;
		}
	}
	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
	if (part_end && src < end)
	{
		debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
		src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
		if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0)
		{
			return -1;
		}
		memcpy(dst, mmc_buf, part_end);
	}
	return 0;
}

int
/****************************************************/
mmc_write(uchar *src, ulong dst, int size)
/****************************************************/
{
	ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
	ulong mmc_block_size, mmc_block_address;

	if (size == 0)
	{
		return 0;
	}

	if (!mmc_ready)
	{
		printf("Please initial the MMC first\n");
		return -1;
	}

	mmc_block_size = MMC_BLOCK_SIZE;
	mmc_block_address = ~(mmc_block_size - 1);

	dst -= CFG_MMC_BASE;
	end = dst + size;
	part_start = ~mmc_block_address & dst;
	part_end = ~mmc_block_address & end;
	aligned_start = mmc_block_address & dst;
	aligned_end = mmc_block_address & end;

	/* all block aligned accesses */
	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
	if (part_start)
	{
		part_len = mmc_block_size - part_start;
		debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
		(ulong)src, dst, end, part_start, part_end, aligned_start, aligned_end);
		if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0)
		{
			return -1;
		}
		memcpy(mmc_buf+part_start, src, part_len);
		if ((mmc_block_write(aligned_start, mmc_buf, mmc_block_size)) < 0)
		{
			return -1;
		}
		dst += part_len;
		src += part_len;
	}
	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
	for (; dst < aligned_end; src += mmc_block_size, dst += mmc_block_size)
	{
		debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
		src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
		if ((mmc_block_write(dst, (uchar *)src, mmc_block_size)) < 0)
		{
			return -1;
		}
	}
	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
	if (part_end && dst < end)
	{
		debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
		src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
		if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0)
		{
			return -1;
		}
		memcpy(mmc_buf, src, part_end);
		if ((mmc_block_write(aligned_end, mmc_buf, mmc_block_size)) < 0)
		{
			return -1;
		}
	}
	return 0;
}

ulong
/****************************************************/
mmc_bread(int dev_num, ulong blknr, ulong blkcnt, ulong *dst)
/****************************************************/
{
	int mmc_block_size = MMC_BLOCK_SIZE;
	ulong src = blknr * mmc_block_size + CFG_MMC_BASE;

	mmc_read(src, (uchar *)dst, blkcnt*mmc_block_size);
	return blkcnt;
}

int
/****************************************************/
mmc_init(int verbose)
/****************************************************/
{
 	int retries, rc = -ENODEV;
	uchar *resp;

#ifdef CONFIG_LUBBOCK
	set_GPIO_mode( GPIO6_MMCCLK_MD );
	set_GPIO_mode( GPIO8_MMCCS0_MD );
#endif
	CKEN |= CKEN12_MMC; /* enable MMC unit clock */

	mmc_csd.c_size = 0;

	MMC_CLKRT  = MMC_CLKRT_0_3125MHZ;
	MMC_RESTO  = MMC_RES_TO_MAX;
	MMC_SPI    = MMC_SPI_DISABLE;

	/* reset */
	retries = 10;
	resp = mmc_cmd(0, 0, 0, 0);
	resp = mmc_cmd(1, 0x00ff, 0xc000, MMC_CMDAT_INIT|MMC_CMDAT_BUSY|MMC_CMDAT_R3);
	while (retries-- && resp && !(resp[4] & 0x80))
	{
		debug("resp %x %x\n", resp[0], resp[1]);
		udelay(50);
		resp = mmc_cmd(1, 0x00ff, 0xff00, MMC_CMDAT_BUSY|MMC_CMDAT_R3);
	}

	/* try to get card id */
	resp = mmc_cmd(2, 0, 0, MMC_CMDAT_R2);
	if (resp)
	{
		/* TODO configure mmc driver depending on card attributes */
		mmc_cid_t *cid = (mmc_cid_t *)resp;
		if (verbose)
		{
			printf("MMC found. Card desciption is:\n");
			printf("Manufacturer ID = %02x%02x%02x\n",
							cid->id[0], cid->id[1], cid->id[2]);
			printf("HW/FW Revision = %x %x\n",cid->hwrev, cid->fwrev);
			cid->hwrev = cid->fwrev = 0;	/* null terminate string */
			printf("Product Name = %s\n",cid->name);
			printf("Serial Number = %02x%02x%02x\n",
							cid->sn[0], cid->sn[1], cid->sn[2]);
			printf("Month = %d\n",cid->month);
			printf("Year = %d\n",1997 + cid->year);
		}
		/* fill in device description */
		mmc_dev.if_type = IF_TYPE_MMC;
		mmc_dev.dev = 0;
		mmc_dev.lun = 0;
		mmc_dev.type = 0;
		/* FIXME fill in the correct size (is set to 32MByte) */
		mmc_dev.blksz = 512;
		mmc_dev.lba = 0x10000;
		sprintf(mmc_dev.vendor,"Man %02x%02x%02x Snr %02x%02x%02x",
				cid->id[0], cid->id[1], cid->id[2],
				cid->sn[0], cid->sn[1], cid->sn[2]);
		sprintf(mmc_dev.product,"%s",cid->name);
		sprintf(mmc_dev.revision,"%x %x",cid->hwrev, cid->fwrev);
		mmc_dev.removable = 0;
		mmc_dev.block_read = mmc_bread;

		/* MMC exists, get CSD too */
		resp = mmc_cmd(MMC_CMD_SET_RCA, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);
		resp = mmc_cmd(MMC_CMD_SEND_CSD, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R2);
		if (resp)
		{
			mmc_csd_t *csd = (mmc_csd_t *)resp;
			memcpy(&mmc_csd, csd, sizeof(csd));
			rc = 0;
			mmc_ready = 1;
			/* FIXME add verbose printout for csd */
		}
	}

	MMC_CLKRT = 0;	/* 20 MHz */
	resp = mmc_cmd(7, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);

	fat_register_device(&mmc_dev,1); /* partitions start counting with 1 */

	return rc;
}

int
mmc_ident(block_dev_desc_t *dev)
{
	return 0;
}

int
mmc2info(ulong addr)
{
	/* FIXME hard codes to 32 MB device */
	if (addr >= CFG_MMC_BASE && addr < CFG_MMC_BASE + 0x02000000)
	{
		return 1;
	}
	return 0;
}

#endif
Commit	Line	Data
71f95118 WD	1	/*
	2	* (C) Copyright 2003
	3	* Kyle Harris, Nexus Technologies, Inc. [email protected]
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <config.h>
	25	#include <common.h>
	26	#include <mmc.h>
	27	#include <asm/errno.h>
	28	#include <asm/arch/hardware.h>
7205e407	29	#include <part.h>
71f95118 WD	30
	31	#ifdef CONFIG_MMC
	32
	33	extern int
7205e407 WD	34	fat_register_device(block_dev_desc_t *dev_desc, int part_no);
	35
	36	static block_dev_desc_t mmc_dev;
	37
	38	block_dev_desc_t * mmc_get_dev(int dev)
	39	{
	40	return ((block_dev_desc_t *)&mmc_dev);
	41	}
71f95118	42
8bde7f77	43	/*
71f95118 WD	44	* FIXME needs to read cid and csd info to determine block size
	45	* and other parameters
	46	*/
	47	static uchar mmc_buf[MMC_BLOCK_SIZE];
	48	static mmc_csd_t mmc_csd;
	49	static int mmc_ready = 0;
	50
	51
8bde7f77	52	static uchar *
71f95118 WD	53	/****************************************************/
	54	mmc_cmd(ushort cmd, ushort argh, ushort argl, ushort cmdat)
	55	/****************************************************/
	56	{
	57	static uchar resp[20];
	58	ulong status;
	59	int words, i;
	60
	61	debug("mmc_cmd %x %x %x %x\n", cmd, argh, argl, cmdat);
	62	MMC_STRPCL = MMC_STRPCL_STOP_CLK;
	63	MMC_I_MASK = ~MMC_I_MASK_CLK_IS_OFF;
	64	while (!(MMC_I_REG & MMC_I_REG_CLK_IS_OFF));
8bde7f77	65	MMC_CMD = cmd;
71f95118 WD	66	MMC_ARGH = argh;
	67	MMC_ARGL = argl;
	68	MMC_CMDAT = cmdat;
	69	MMC_I_MASK = ~MMC_I_MASK_END_CMD_RES;
	70	MMC_STRPCL = MMC_STRPCL_START_CLK;
	71	while (!(MMC_I_REG & MMC_I_REG_END_CMD_RES));
	72
	73	status = MMC_STAT;
	74	debug("MMC status %x\n", status);
	75	if (status & MMC_STAT_TIME_OUT_RESPONSE)
	76	{
	77	return 0;
	78	}
	79
	80	switch (cmdat & 0x3)
	81	{
	82	case MMC_CMDAT_R1:
	83	case MMC_CMDAT_R3:
8bde7f77	84	words = 3;
71f95118 WD	85	break;
	86
	87	case MMC_CMDAT_R2:
8bde7f77	88	words = 8;
71f95118 WD	89	break;
	90
	91	default:
	92	return 0;
	93	}
	94	for (i = words-1; i >= 0; i--)
	95	{
	96	ulong res_fifo = MMC_RES;
	97	int offset = i << 1;
	98
	99	resp[offset] = ((uchar *)&res_fifo)[0];
	100	resp[offset+1] = ((uchar *)&res_fifo)[1];
	101	}
	102	#ifdef MMC_DEBUG
	103	for (i=0; i<words*2; i += 2)
	104	{
	105	printf("MMC resp[%d] = %02x\n", i, resp[i]);
	106	printf("MMC resp[%d] = %02x\n", i+1, resp[i+1]);
	107	}
	108	#endif
	109	return resp;
	110	}
	111
	112	int
	113	/****************************************************/
	114	mmc_block_read(uchar *dst, ulong src, ulong len)
	115	/****************************************************/
	116	{
	117	uchar *resp;
	118	ushort argh, argl;
	119	ulong status;
	120
	121	if (len == 0)
	122	{
	123	return 0;
	124	}
	125
	126	debug("mmc_block_rd dst %lx src %lx len %d\n", (ulong)dst, src, len);
	127
	128	argh = len >> 16;
	129	argl = len & 0xffff;
	130
	131	/* set block len */
	132	resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
	133
	134	/* send read command */
	135	argh = src >> 16;
	136	argl = src & 0xffff;
	137	MMC_STRPCL = MMC_STRPCL_STOP_CLK;
	138	MMC_RDTO = 0xffff;
	139	MMC_NOB = 1;
	140	MMC_BLKLEN = len;
8bde7f77	141	resp = mmc_cmd(MMC_CMD_READ_BLOCK, argh, argl,
71f95118 WD	142	MMC_CMDAT_R1\|MMC_CMDAT_READ\|MMC_CMDAT_BLOCK\|MMC_CMDAT_DATA_EN);
71f95118 WD	143
8bde7f77	144
71f95118 WD	145	MMC_I_MASK = ~MMC_I_MASK_RXFIFO_RD_REQ;
	146	while (len)
	147	{
	148	if (MMC_I_REG & MMC_I_REG_RXFIFO_RD_REQ)
	149	{
	150	*dst++ = MMC_RXFIFO;
	151	len--;
	152	}
	153	status = MMC_STAT;
	154	if (status & MMC_STAT_ERRORS)
	155	{
	156	printf("MMC_STAT error %lx\n", status);
	157	return -1;
	158	}
	159	}
	160	MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
	161	while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
	162	status = MMC_STAT;
	163	if (status & MMC_STAT_ERRORS)
	164	{
	165	printf("MMC_STAT error %lx\n", status);
	166	return -1;
	167	}
	168	return 0;
	169	}
	170
	171	int
	172	/****************************************************/
	173	mmc_block_write(ulong dst, uchar *src, int len)
	174	/****************************************************/
	175	{
	176	uchar *resp;
	177	ushort argh, argl;
	178	ulong status;
	179
	180	if (len == 0)
	181	{
	182	return 0;
	183	}
	184
	185	debug("mmc_block_wr dst %lx src %lx len %d\n", dst, (ulong)src, len);
	186
	187	argh = len >> 16;
	188	argl = len & 0xffff;
	189
	190	/* set block len */
	191	resp = mmc_cmd(MMC_CMD_SET_BLOCKLEN, argh, argl, MMC_CMDAT_R1);
	192
	193	/* send write command */
	194	argh = dst >> 16;
	195	argl = dst & 0xffff;
	196	MMC_STRPCL = MMC_STRPCL_STOP_CLK;
	197	MMC_NOB = 1;
	198	MMC_BLKLEN = len;
8bde7f77	199	resp = mmc_cmd(MMC_CMD_WRITE_BLOCK, argh, argl,
71f95118	200	MMC_CMDAT_R1\|MMC_CMDAT_WRITE\|MMC_CMDAT_BLOCK\|MMC_CMDAT_DATA_EN);
8bde7f77	201
71f95118 WD	202	MMC_I_MASK = ~MMC_I_MASK_TXFIFO_WR_REQ;
	203	while (len)
	204	{
	205	if (MMC_I_REG & MMC_I_REG_TXFIFO_WR_REQ)
	206	{
	207	int i, bytes = min(32,len);
	208
	209	for (i=0; i<bytes; i++)
	210	{
	211	MMC_TXFIFO = *src++;
	212	}
	213	if (bytes < 32)
	214	{
	215	MMC_PRTBUF = MMC_PRTBUF_BUF_PART_FULL;
	216	}
	217	len -= bytes;
	218	}
	219	status = MMC_STAT;
	220	if (status & MMC_STAT_ERRORS)
	221	{
	222	printf("MMC_STAT error %lx\n", status);
	223	return -1;
	224	}
	225	}
	226	MMC_I_MASK = ~MMC_I_MASK_DATA_TRAN_DONE;
	227	while (!(MMC_I_REG & MMC_I_REG_DATA_TRAN_DONE));
	228	MMC_I_MASK = ~MMC_I_MASK_PRG_DONE;
	229	while (!(MMC_I_REG & MMC_I_REG_PRG_DONE));
	230	status = MMC_STAT;
	231	if (status & MMC_STAT_ERRORS)
	232	{
	233	printf("MMC_STAT error %lx\n", status);
	234	return -1;
	235	}
	236	return 0;
	237	}
	238
	239
	240	int
	241	/****************************************************/
	242	mmc_read(ulong src, uchar *dst, int size)
	243	/****************************************************/
	244	{
	245	ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
	246	ulong mmc_block_size, mmc_block_address;
	247
	248	if (size == 0)
	249	{
	250	return 0;
	251	}
	252
	253	if (!mmc_ready)
	254	{
	255	printf("Please initial the MMC first\n");
	256	return -1;
	257	}
	258
	259	mmc_block_size = MMC_BLOCK_SIZE;
	260	mmc_block_address = ~(mmc_block_size - 1);
	261
	262	src -= CFG_MMC_BASE;
	263	end = src + size;
	264	part_start = ~mmc_block_address & src;
	265	part_end = ~mmc_block_address & end;
266	aligned_start = mmc_block_address & src;
267	aligned_end = mmc_block_address & end;
268
269	/* all block aligned accesses */
270	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
271	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
272	if (part_start)
273	{
274	part_len = mmc_block_size - part_start;
275	debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
276	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
277	if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0)
278	{
279	return -1;
280	}
281	memcpy(dst, mmc_buf+part_start, part_len);
282	dst += part_len;
283	src += part_len;
284	}
285	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
286	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
287	for (; src < aligned_end; src += mmc_block_size, dst += mmc_block_size)
288	{
289	debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
290	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
291	if ((mmc_block_read((uchar *)(dst), src, mmc_block_size)) < 0)
292	{
293	return -1;
294	}
295	}
296	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
297	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
298	if (part_end && src < end)
299	{
300	debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
301	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
302	if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0)
303	{
304	return -1;
305	}
306	memcpy(dst, mmc_buf, part_end);
307	}
308	return 0;
309	}
310
311	int
312	/****************************************************/
313	mmc_write(uchar *src, ulong dst, int size)
314	/****************************************************/
315	{
316	ulong end, part_start, part_end, part_len, aligned_start, aligned_end;
317	ulong mmc_block_size, mmc_block_address;
318
319	if (size == 0)
320	{
321	return 0;
322	}
323
324	if (!mmc_ready)
325	{
326	printf("Please initial the MMC first\n");
327	return -1;
328	}
329
330	mmc_block_size = MMC_BLOCK_SIZE;
331	mmc_block_address = ~(mmc_block_size - 1);
332
333	dst -= CFG_MMC_BASE;
334	end = dst + size;
335	part_start = ~mmc_block_address & dst;
336	part_end = ~mmc_block_address & end;
337	aligned_start = mmc_block_address & dst;
338	aligned_end = mmc_block_address & end;
339
340	/* all block aligned accesses */
341	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
342	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
343	if (part_start)
344	{
345	part_len = mmc_block_size - part_start;
346	debug("ps src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
347	(ulong)src, dst, end, part_start, part_end, aligned_start, aligned_end);
348	if ((mmc_block_read(mmc_buf, aligned_start, mmc_block_size)) < 0)
349	{
350	return -1;
351	}
352	memcpy(mmc_buf+part_start, src, part_len);
353	if ((mmc_block_write(aligned_start, mmc_buf, mmc_block_size)) < 0)
354	{
355	return -1;
356	}
357	dst += part_len;
358	src += part_len;
359	}
360	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
361	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
362	for (; dst < aligned_end; src += mmc_block_size, dst += mmc_block_size)
363	{
364	debug("al src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
365	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
366	if ((mmc_block_write(dst, (uchar *)src, mmc_block_size)) < 0)
367	{
368	return -1;
369	}
370	}
371	debug("src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
372	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
373	if (part_end && dst < end)
374	{
375	debug("pe src %lx dst %lx end %lx pstart %lx pend %lx astart %lx aend %lx\n",
376	src, (ulong)dst, end, part_start, part_end, aligned_start, aligned_end);
377	if ((mmc_block_read(mmc_buf, aligned_end, mmc_block_size)) < 0)
378	{
379	return -1;
380	}
381	memcpy(mmc_buf, src, part_end);
382	if ((mmc_block_write(aligned_end, mmc_buf, mmc_block_size)) < 0)
383	{
384	return -1;
385	}
386	}
387	return 0;
388	}
389
7205e407	390	ulong
71f95118	391	/****************************************************/
7205e407	392	mmc_bread(int dev_num, ulong blknr, ulong blkcnt, ulong *dst)
71f95118 WD	393	/****************************************************/
	394	{
	395	int mmc_block_size = MMC_BLOCK_SIZE;
	396	ulong src = blknr * mmc_block_size + CFG_MMC_BASE;
	397
	398	mmc_read(src, (uchar )dst, blkcntmmc_block_size);
	399	return blkcnt;
	400	}
	401
	402	int
	403	/****************************************************/
	404	mmc_init(int verbose)
	405	/****************************************************/
	406	{
	407	int retries, rc = -ENODEV;
	408	uchar *resp;
	409
	410	#ifdef CONFIG_LUBBOCK
	411	set_GPIO_mode( GPIO6_MMCCLK_MD );
	412	set_GPIO_mode( GPIO8_MMCCS0_MD );
	413	#endif
	414	CKEN \|= CKEN12_MMC; /* enable MMC unit clock */
	415
	416	mmc_csd.c_size = 0;
	417
	418	MMC_CLKRT = MMC_CLKRT_0_3125MHZ;
8bde7f77	419	MMC_RESTO = MMC_RES_TO_MAX;
71f95118 WD	420	MMC_SPI = MMC_SPI_DISABLE;
	421
	422	/* reset */
	423	retries = 10;
	424	resp = mmc_cmd(0, 0, 0, 0);
	425	resp = mmc_cmd(1, 0x00ff, 0xc000, MMC_CMDAT_INIT\|MMC_CMDAT_BUSY\|MMC_CMDAT_R3);
	426	while (retries-- && resp && !(resp[4] & 0x80))
	427	{
	428	debug("resp %x %x\n", resp[0], resp[1]);
	429	udelay(50);
	430	resp = mmc_cmd(1, 0x00ff, 0xff00, MMC_CMDAT_BUSY\|MMC_CMDAT_R3);
	431	}
	432
	433	/* try to get card id */
	434	resp = mmc_cmd(2, 0, 0, MMC_CMDAT_R2);
	435	if (resp)
	436	{
	437	/* TODO configure mmc driver depending on card attributes */
	438	mmc_cid_t cid = (mmc_cid_t )resp;
	439	if (verbose)
	440	{
	441	printf("MMC found. Card desciption is:\n");
8bde7f77	442	printf("Manufacturer ID = %02x%02x%02x\n",
71f95118 WD	443	cid->id[0], cid->id[1], cid->id[2]);
	444	printf("HW/FW Revision = %x %x\n",cid->hwrev, cid->fwrev);
	445	cid->hwrev = cid->fwrev = 0; /* null terminate string */
	446	printf("Product Name = %s\n",cid->name);
8bde7f77	447	printf("Serial Number = %02x%02x%02x\n",
71f95118 WD	448	cid->sn[0], cid->sn[1], cid->sn[2]);
	449	printf("Month = %d\n",cid->month);
	450	printf("Year = %d\n",1997 + cid->year);
	451	}
7205e407 WD	452	/* fill in device description */
	453	mmc_dev.if_type = IF_TYPE_MMC;
	454	mmc_dev.dev = 0;
	455	mmc_dev.lun = 0;
	456	mmc_dev.type = 0;
	457	/* FIXME fill in the correct size (is set to 32MByte) */
	458	mmc_dev.blksz = 512;
	459	mmc_dev.lba = 0x10000;
	460	sprintf(mmc_dev.vendor,"Man %02x%02x%02x Snr %02x%02x%02x",
	461	cid->id[0], cid->id[1], cid->id[2],
	462	cid->sn[0], cid->sn[1], cid->sn[2]);
	463	sprintf(mmc_dev.product,"%s",cid->name);
	464	sprintf(mmc_dev.revision,"%x %x",cid->hwrev, cid->fwrev);
	465	mmc_dev.removable = 0;
	466	mmc_dev.block_read = mmc_bread;
71f95118 WD	467
	468	/* MMC exists, get CSD too */
	469	resp = mmc_cmd(MMC_CMD_SET_RCA, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);
	470	resp = mmc_cmd(MMC_CMD_SEND_CSD, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R2);
	471	if (resp)
	472	{
	473	mmc_csd_t csd = (mmc_csd_t )resp;
	474	memcpy(&mmc_csd, csd, sizeof(csd));
	475	rc = 0;
	476	mmc_ready = 1;
	477	/* FIXME add verbose printout for csd */
	478	}
	479	}
	480
	481	MMC_CLKRT = 0; /* 20 MHz */
	482	resp = mmc_cmd(7, MMC_DEFAULT_RCA, 0, MMC_CMDAT_R1);
	483
42d1f039	484	fat_register_device(&mmc_dev,1); /* partitions start counting with 1 */
71f95118 WD	485
	486	return rc;
	487	}
	488
	489	int
	490	mmc_ident(block_dev_desc_t *dev)
	491	{
	492	return 0;
	493	}
	494
	495	int
	496	mmc2info(ulong addr)
	497	{
	498	/* FIXME hard codes to 32 MB device */
	499	if (addr >= CFG_MMC_BASE && addr < CFG_MMC_BASE + 0x02000000)
	500	{
	501	return 1;
	502	}
	503	return 0;
	504	}
	505
	506	#endif