[J-u-boot.git] / board / rmu / flash.c

/*
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, [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
 */

/* #define DEBUG */

#include <common.h>
#include <mpc8xx.h>

flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t *info);

/*-----------------------------------------------------------------------
 */

unsigned long flash_init (void)
{
	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long size_b0 ;
	int i;

	/* Init: no FLASHes known */
	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	/* Static FLASH Bank configuration here - FIXME XXX */

	debug ("\n## Get flash bank size @ 0x%08x\n", FLASH_BASE_PRELIM);

	size_b0 = flash_get_size((vu_long *)FLASH_BASE_PRELIM, &flash_info[0]);
	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0<<20);
	}

	debug  ("## Before remap:  BR0: 0x%08x    OR0: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0);

	/* Remap FLASH according to real size */
	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;

	debug ("## BR0: 0x%08x    OR0: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0);

	/* Re-do sizing to get full correct info */

	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);

	/* monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CFG_MONITOR_BASE,
		      CFG_MONITOR_BASE+monitor_flash_len-1,
		      &flash_info[0]);

#ifdef	CONFIG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_ENV_ADDR,
		      CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
		      &flash_info[0]);
#endif

#if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
	debug ("Protect redundand environment: %08lx ... %08lx\n",
		(ulong)CONFIG_ENV_ADDR_REDUND,
		(ulong)CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE - 1);

	flash_protect(FLAG_PROTECT_SET,
		      CONFIG_ENV_ADDR_REDUND,
		      CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE_REDUND - 1,
		      &flash_info[0]);
#endif

	flash_info[0].size = size_b0;

	debug ("## Final Flash bank size: %08lx\n", size_b0);

	return (size_b0);
}

/*-----------------------------------------------------------------------
 */
static void flash_get_offsets (ulong base, flash_info_t *info)
{
	int i;

	/* set up sector start address table */
	if (info->flash_id & FLASH_BTYPE) {
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00010000;
		info->start[2] = base + 0x00018000;
		info->start[3] = base + 0x00020000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + ((i-3) * 0x00040000) ;
		}
	} else {
		/* set sector offsets for top boot block type		*/
		i = info->sector_count - 1;
		info->start[i--] = base + info->size - 0x00010000;
		info->start[i--] = base + info->size - 0x00018000;
		info->start[i--] = base + info->size - 0x00020000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00040000;
		}
	}

}

/*-----------------------------------------------------------------------
 */
void flash_print_info  (flash_info_t *info)
{
	int i;

	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("missing or unknown FLASH type\n");
		return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:	printf ("AMD ");		break;
	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit, top boot sector)\n");
				break;
	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit, top boot sector)\n");
				break;
	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit, top boot sector)\n");
				break;
	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit, top boot sector)\n");
				break;
	default:		printf ("Unknown Chip Type\n");
				break;
	}

	printf ("  Size: %ld MB in %d Sectors\n",
		info->size >> 20, info->sector_count);

	printf ("  Sector Start Addresses:");
	for (i=0; i<info->sector_count; ++i) {
		if ((i % 5) == 0)
			printf ("\n   ");
		printf (" %08lX%s",
			info->start[i],
			info->protect[i] ? " (RO)" : "     "
		);
	}
	printf ("\n");
	return;
}

/*-----------------------------------------------------------------------
 */


/*-----------------------------------------------------------------------
 */

/*
 * The following code cannot be run from FLASH!
 */

static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
	short i;
	ulong value;
	ulong base = (ulong)addr;

	/* Write auto select command: read Manufacturer ID */
	addr[0xAAA] = 0xAAAAAAAA ;
	addr[0x555] = 0x55555555 ;
	addr[0xAAA] = 0x90909090 ;

	value = addr[0] ;

	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);

	switch (value & 0x00FF00FF) {
	case AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	case FUJ_MANUFACT:
		info->flash_id = FLASH_MAN_FUJ;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}

	value = addr[2] ;		/* device ID		*/

	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);

	switch (value & 0x00FF00FF) {
	case (AMD_ID_LV400T & 0x00FF00FF):
		info->flash_id += FLASH_AM400T;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (AMD_ID_LV400B & 0x00FF00FF):
		info->flash_id += FLASH_AM400B;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (AMD_ID_LV800T & 0x00FF00FF):
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (AMD_ID_LV800B & 0x00FF00FF):
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00400000;	/*%%% Size doubled by yooth */
		break;				/* => 4 MB		*/

	case (AMD_ID_LV160T & 0x00FF00FF):
		info->flash_id += FLASH_AM160T;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/

	case (AMD_ID_LV160B & 0x00FF00FF):
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/
	case (AMD_ID_LV320T & 0x00FF00FF):
		info->flash_id += FLASH_AM320T;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

	case (AMD_ID_LV320B & 0x00FF00FF):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 67;
		info->size = 0x01000000;
		break;				/* => 16 MB		*/
	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */

	}
	/* set up sector start address table */
	if (info->flash_id & FLASH_BTYPE) {
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00010000;
		info->start[2] = base + 0x00018000;
		info->start[3] = base + 0x00020000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + ((i-3) * 0x00040000) ;
		}
	} else {
		/* set sector offsets for top boot block type		*/
		i = info->sector_count - 1;
		info->start[i--] = base + info->size - 0x00010000;
		info->start[i--] = base + info->size - 0x00018000;
		info->start[i--] = base + info->size - 0x00020000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00040000;
		}
	}

	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
		/* D0 = 1 if protected */
		addr = (volatile unsigned long *)(info->start[i]);
		info->protect[i] = addr[4] & 1 ;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr = (volatile unsigned long *)info->start[0];

		*addr = 0xF0F0F0F0;	/* reset bank */
	}

	return (info->size);
}


/*-----------------------------------------------------------------------
 */

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	vu_long *addr = (vu_long*)(info->start[0]);
	int flag, prot, sect, l_sect;
	ulong start, now, last;

	debug ("flash_erase: first: %d last: %d\n", s_first, s_last);

	if ((s_first < 0) || (s_first > s_last)) {
		if (info->flash_id == FLASH_UNKNOWN) {
			printf ("- missing\n");
		} else {
			printf ("- no sectors to erase\n");
		}
		return 1;
	}

	if ((info->flash_id == FLASH_UNKNOWN) ||
	    (info->flash_id > FLASH_AMD_COMP)) {
		printf ("Can't erase unknown flash type %08lx - aborted\n",
			info->flash_id);
		return 1;
	}

	prot = 0;
	for (sect=s_first; sect<=s_last; ++sect) {
		if (info->protect[sect]) {
			prot++;
		}
	}

	if (prot) {
		printf ("- Warning: %d protected sectors will not be erased!\n",
			prot);
	} else {
		printf ("\n");
	}

	l_sect = -1;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr[0xAAA] = 0xAAAAAAAA;
	addr[0x555] = 0x55555555;
	addr[0xAAA] = 0x80808080;
	addr[0xAAA] = 0xAAAAAAAA;
	addr[0x555] = 0x55555555;

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_long *)(info->start[sect]) ;
			addr[0] = 0x30303030 ;
			l_sect = sect;
		}
	}

	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts();

	/* wait at least 80us - let's wait 1 ms */
	udelay (1000);

	/*
	 * We wait for the last triggered sector
	 */
	if (l_sect < 0)
		goto DONE;

	start = get_timer (0);
	last  = start;
	addr = (vu_long *)(info->start[l_sect]);
	while ((addr[0] & 0x80808080) != 0x80808080) {
		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			putc ('.');
			last = now;
		}
	}

DONE:
	/* reset to read mode */
	addr = (vu_long *)info->start[0];
	addr[0] = 0xF0F0F0F0;	/* reset bank */

	printf (" done\n");
	return 0;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	ulong cp, wp, data;
	int i, l, rc;

	wp = (addr & ~3);	/* get lower word aligned address */

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - wp) != 0) {
		data = 0;
		for (i=0, cp=wp; i<l; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}
		for (; i<4 && cnt>0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt==0 && i<4; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}

		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp += 4;
	}

	/*
	 * handle word aligned part
	 */
	while (cnt >= 4) {
		data = 0;
		for (i=0; i<4; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += 4;
		cnt -= 4;
	}

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

	/*
	 * handle unaligned tail bytes
	 */
	data = 0;
	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}
	for (; i<4; ++i, ++cp) {
		data = (data << 8) | (*(uchar *)cp);
	}

	return (write_word(info, wp, data));
}

/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_word (flash_info_t *info, ulong dest, ulong data)
{
	vu_long *addr = (vu_long *)(info->start[0]);
	ulong start;
	int flag;

	/* Check if Flash is (sufficiently) erased */
	if ((*((vu_long *)dest) & data) != data) {
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr[0xAAA] = 0xAAAAAAAA;
	addr[0x555] = 0x55555555;
	addr[0xAAA] = 0xA0A0A0A0;

	*((vu_long *)dest) = data;

	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts();

	/* data polling for D7 */
	start = get_timer (0);
	while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
73a8b27c	1	/*
7e780369	2	* (C) Copyright 2000-2004
73a8b27c WD	3	* Wolfgang Denk, DENX Software Engineering, [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
7e780369 WD	24	/* #define DEBUG */
7e780369 WD	25
73a8b27c WD	26	#include <common.h>
	27	#include <mpc8xx.h>
	28
	29	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	30
	31	/*-----------------------------------------------------------------------
	32	* Functions
	33	*/
	34	static ulong flash_get_size (vu_long addr, flash_info_t info);
	35	static int write_word (flash_info_t *info, ulong dest, ulong data);
	36	static void flash_get_offsets (ulong base, flash_info_t *info);
	37
	38	/*-----------------------------------------------------------------------
	39	*/
	40
	41	unsigned long flash_init (void)
	42	{
	43	volatile immap_t immap = (immap_t )CFG_IMMR;
	44	volatile memctl8xx_t *memctl = &immap->im_memctl;
	45	unsigned long size_b0 ;
	46	int i;
	47
	48	/* Init: no FLASHes known */
	49	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
	50	flash_info[i].flash_id = FLASH_UNKNOWN;
	51	}
	52
	53	/* Static FLASH Bank configuration here - FIXME XXX */
7e780369 WD	54
	55	debug ("\n## Get flash bank size @ 0x%08x\n", FLASH_BASE_PRELIM);
	56
73a8b27c WD	57	size_b0 = flash_get_size((vu_long *)FLASH_BASE_PRELIM, &flash_info[0]);
	58	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	59	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	60	size_b0, size_b0<<20);
	61	}
	62
7e780369 WD	63	debug ("## Before remap: BR0: 0x%08x OR0: 0x%08x\n",
	64	memctl->memc_br0, memctl->memc_or0);
	65
73a8b27c WD	66	/* Remap FLASH according to real size */
	67	memctl->memc_or0 = CFG_OR_TIMING_FLASH \| (-size_b0 & 0xFFFF8000);
	68	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) \| BR_MS_GPCM \| BR_V;
	69
7e780369 WD	70	debug ("## BR0: 0x%08x OR0: 0x%08x\n",
	71	memctl->memc_br0, memctl->memc_or0);
	72
73a8b27c WD	73	/* Re-do sizing to get full correct info */
	74
	75	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
	76	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
	77
73a8b27c WD	78	/* monitor protection ON by default */
	79	flash_protect(FLAG_PROTECT_SET,
	80	CFG_MONITOR_BASE,
	81	CFG_MONITOR_BASE+monitor_flash_len-1,
	82	&flash_info[0]);
73a8b27c	83
5a1aceb0	84	#ifdef CONFIG_ENV_IS_IN_FLASH
73a8b27c WD	85	/* ENV protection ON by default */
73a8b27c WD	86	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	87	CONFIG_ENV_ADDR,
0e8d1586 JCPV	88	CONFIG_ENV_ADDR+CONFIG_ENV_SIZE-1,
73a8b27c WD	89	&flash_info[0]);
	90	#endif
	91
0e8d1586	92	#if defined(CONFIG_ENV_ADDR_REDUND) \|\| defined(CONFIG_ENV_OFFSET_REDUND)
7e780369	93	debug ("Protect redundand environment: %08lx ... %08lx\n",
0e8d1586 JCPV	94	(ulong)CONFIG_ENV_ADDR_REDUND,
0e8d1586 JCPV	95	(ulong)CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE - 1);
7e780369 WD	96
7e780369 WD	97	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	98	CONFIG_ENV_ADDR_REDUND,
0e8d1586 JCPV	99	CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE_REDUND - 1,
7e780369 WD	100	&flash_info[0]);
	101	#endif
	102
73a8b27c WD	103	flash_info[0].size = size_b0;
73a8b27c WD	104
7e780369 WD	105	debug ("## Final Flash bank size: %08lx\n", size_b0);
7e780369 WD	106
73a8b27c WD	107	return (size_b0);
	108	}
	109
	110	/*-----------------------------------------------------------------------
	111	*/
	112	static void flash_get_offsets (ulong base, flash_info_t *info)
	113	{
	114	int i;
	115
	116	/* set up sector start address table */
	117	if (info->flash_id & FLASH_BTYPE) {
	118	/* set sector offsets for bottom boot block type */
	119	info->start[0] = base + 0x00000000;
	120	info->start[1] = base + 0x00010000;
	121	info->start[2] = base + 0x00018000;
	122	info->start[3] = base + 0x00020000;
	123	for (i = 4; i < info->sector_count; i++) {
	124	info->start[i] = base + ((i-3) * 0x00040000) ;
	125	}
	126	} else {
	127	/* set sector offsets for top boot block type */
	128	i = info->sector_count - 1;
	129	info->start[i--] = base + info->size - 0x00010000;
	130	info->start[i--] = base + info->size - 0x00018000;
	131	info->start[i--] = base + info->size - 0x00020000;
	132	for (; i >= 0; i--) {
	133	info->start[i] = base + i * 0x00040000;
	134	}
	135	}
	136
	137	}
	138
	139	/*-----------------------------------------------------------------------
	140	*/
	141	void flash_print_info (flash_info_t *info)
	142	{
	143	int i;
	144
	145	if (info->flash_id == FLASH_UNKNOWN) {
	146	printf ("missing or unknown FLASH type\n");
	147	return;
	148	}
	149
	150	switch (info->flash_id & FLASH_VENDMASK) {
	151	case FLASH_MAN_AMD: printf ("AMD "); break;
	152	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	153	default: printf ("Unknown Vendor "); break;
	154	}
	155
	156	switch (info->flash_id & FLASH_TYPEMASK) {
	157	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	158	break;
	159	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	160	break;
	161	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	162	break;
	163	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	164	break;
	165	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	166	break;
	167	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	168	break;
	169	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
	170	break;
171	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
172	break;
173	default: printf ("Unknown Chip Type\n");
174	break;
175	}
176
177	printf (" Size: %ld MB in %d Sectors\n",
178	info->size >> 20, info->sector_count);
179
180	printf (" Sector Start Addresses:");
181	for (i=0; i<info->sector_count; ++i) {
182	if ((i % 5) == 0)
183	printf ("\n ");
184	printf (" %08lX%s",
185	info->start[i],
186	info->protect[i] ? " (RO)" : " "
187	);
188	}
189	printf ("\n");
190	return;
191	}
192
193	/*-----------------------------------------------------------------------
194	*/
195
196
197	/*-----------------------------------------------------------------------
198	*/
199
200	/*
201	* The following code cannot be run from FLASH!
202	*/
203
204	static ulong flash_get_size (vu_long addr, flash_info_t info)
205	{
206	short i;
207	ulong value;
208	ulong base = (ulong)addr;
209
210	/* Write auto select command: read Manufacturer ID */
211	addr[0xAAA] = 0xAAAAAAAA ;
212	addr[0x555] = 0x55555555 ;
213	addr[0xAAA] = 0x90909090 ;
214
215	value = addr[0] ;
216
7e780369 WD	217	debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
7e780369 WD	218
73a8b27c WD	219	switch (value & 0x00FF00FF) {
	220	case AMD_MANUFACT:
	221	info->flash_id = FLASH_MAN_AMD;
	222	break;
	223	case FUJ_MANUFACT:
	224	info->flash_id = FLASH_MAN_FUJ;
	225	break;
	226	default:
	227	info->flash_id = FLASH_UNKNOWN;
	228	info->sector_count = 0;
	229	info->size = 0;
	230	return (0); /* no or unknown flash */
	231	}
	232
	233	value = addr[2] ; /* device ID */
	234
7e780369 WD	235	debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
7e780369 WD	236
73a8b27c WD	237	switch (value & 0x00FF00FF) {
	238	case (AMD_ID_LV400T & 0x00FF00FF):
	239	info->flash_id += FLASH_AM400T;
	240	info->sector_count = 11;
	241	info->size = 0x00100000;
	242	break; /* => 1 MB */
	243
	244	case (AMD_ID_LV400B & 0x00FF00FF):
	245	info->flash_id += FLASH_AM400B;
	246	info->sector_count = 11;
	247	info->size = 0x00100000;
	248	break; /* => 1 MB */
	249
	250	case (AMD_ID_LV800T & 0x00FF00FF):
	251	info->flash_id += FLASH_AM800T;
	252	info->sector_count = 19;
	253	info->size = 0x00200000;
	254	break; /* => 2 MB */
	255
	256	case (AMD_ID_LV800B & 0x00FF00FF):
	257	info->flash_id += FLASH_AM800B;
	258	info->sector_count = 19;
	259	info->size = 0x00400000; /%%% Size doubled by yooth /
	260	break; /* => 4 MB */
	261
	262	case (AMD_ID_LV160T & 0x00FF00FF):
	263	info->flash_id += FLASH_AM160T;
	264	info->sector_count = 35;
	265	info->size = 0x00400000;
	266	break; /* => 4 MB */
	267
	268	case (AMD_ID_LV160B & 0x00FF00FF):
	269	info->flash_id += FLASH_AM160B;
	270	info->sector_count = 35;
	271	info->size = 0x00800000;
	272	break; /* => 8 MB */
7e780369	273	case (AMD_ID_LV320T & 0x00FF00FF):
73a8b27c WD	274	info->flash_id += FLASH_AM320T;
	275	info->sector_count = 67;
	276	info->size = 0x00800000;
	277	break; /* => 8 MB */
	278
7e780369	279	case (AMD_ID_LV320B & 0x00FF00FF):
73a8b27c WD	280	info->flash_id += FLASH_AM320B;
	281	info->sector_count = 67;
	282	info->size = 0x01000000;
	283	break; /* => 16 MB */
73a8b27c WD	284	default:
	285	info->flash_id = FLASH_UNKNOWN;
	286	return (0); /* => no or unknown flash */
	287
	288	}
73a8b27c WD	289	/* set up sector start address table */
	290	if (info->flash_id & FLASH_BTYPE) {
	291	/* set sector offsets for bottom boot block type */
	292	info->start[0] = base + 0x00000000;
	293	info->start[1] = base + 0x00010000;
	294	info->start[2] = base + 0x00018000;
	295	info->start[3] = base + 0x00020000;
	296	for (i = 4; i < info->sector_count; i++) {
	297	info->start[i] = base + ((i-3) * 0x00040000) ;
	298	}
	299	} else {
	300	/* set sector offsets for top boot block type */
	301	i = info->sector_count - 1;
	302	info->start[i--] = base + info->size - 0x00010000;
	303	info->start[i--] = base + info->size - 0x00018000;
	304	info->start[i--] = base + info->size - 0x00020000;
	305	for (; i >= 0; i--) {
	306	info->start[i] = base + i * 0x00040000;
	307	}
	308	}
	309
	310	/* check for protected sectors */
	311	for (i = 0; i < info->sector_count; i++) {
	312	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	313	/* D0 = 1 if protected */
	314	addr = (volatile unsigned long *)(info->start[i]);
	315	info->protect[i] = addr[4] & 1 ;
	316	}
	317
	318	/*
	319	* Prevent writes to uninitialized FLASH.
	320	*/
	321	if (info->flash_id != FLASH_UNKNOWN) {
	322	addr = (volatile unsigned long *)info->start[0];
	323
	324	addr = 0xF0F0F0F0; / reset bank */
	325	}
	326
	327	return (info->size);
	328	}
	329
	330
	331	/*-----------------------------------------------------------------------
	332	*/
	333
	334	int flash_erase (flash_info_t *info, int s_first, int s_last)
	335	{
	336	vu_long addr = (vu_long)(info->start[0]);
	337	int flag, prot, sect, l_sect;
	338	ulong start, now, last;
	339
7e780369 WD	340	debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
7e780369 WD	341
73a8b27c WD	342	if ((s_first < 0) \|\| (s_first > s_last)) {
	343	if (info->flash_id == FLASH_UNKNOWN) {
	344	printf ("- missing\n");
	345	} else {
	346	printf ("- no sectors to erase\n");
	347	}
	348	return 1;
	349	}
	350
	351	if ((info->flash_id == FLASH_UNKNOWN) \|\|
	352	(info->flash_id > FLASH_AMD_COMP)) {
	353	printf ("Can't erase unknown flash type %08lx - aborted\n",
	354	info->flash_id);
	355	return 1;
	356	}
	357
	358	prot = 0;
	359	for (sect=s_first; sect<=s_last; ++sect) {
	360	if (info->protect[sect]) {
	361	prot++;
	362	}
	363	}
	364
	365	if (prot) {
	366	printf ("- Warning: %d protected sectors will not be erased!\n",
	367	prot);
	368	} else {
	369	printf ("\n");
	370	}
	371
	372	l_sect = -1;
	373
	374	/* Disable interrupts which might cause a timeout here */
	375	flag = disable_interrupts();
	376
	377	addr[0xAAA] = 0xAAAAAAAA;
	378	addr[0x555] = 0x55555555;
	379	addr[0xAAA] = 0x80808080;
	380	addr[0xAAA] = 0xAAAAAAAA;
	381	addr[0x555] = 0x55555555;
	382
	383	/* Start erase on unprotected sectors */
	384	for (sect = s_first; sect<=s_last; sect++) {
	385	if (info->protect[sect] == 0) { /* not protected */
	386	addr = (vu_long *)(info->start[sect]) ;
	387	addr[0] = 0x30303030 ;
	388	l_sect = sect;
	389	}
	390	}
	391
	392	/* re-enable interrupts if necessary */
	393	if (flag)
	394	enable_interrupts();
	395
	396	/* wait at least 80us - let's wait 1 ms */
	397	udelay (1000);
	398
	399	/*
	400	* We wait for the last triggered sector
	401	*/
	402	if (l_sect < 0)
	403	goto DONE;
	404
	405	start = get_timer (0);
406	last = start;
407	addr = (vu_long *)(info->start[l_sect]);
408	while ((addr[0] & 0x80808080) != 0x80808080) {
409	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
410	printf ("Timeout\n");
411	return 1;
412	}
413	/* show that we're waiting */
414	if ((now - last) > 1000) { /* every second */
415	putc ('.');
416	last = now;
417	}
418	}
419
420	DONE:
421	/* reset to read mode */
422	addr = (vu_long *)info->start[0];
423	addr[0] = 0xF0F0F0F0; /* reset bank */
424
425	printf (" done\n");
426	return 0;
427	}
428
429	/*-----------------------------------------------------------------------
430	* Copy memory to flash, returns:
431	* 0 - OK
432	* 1 - write timeout
433	* 2 - Flash not erased
434	*/
435
436	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
437	{
438	ulong cp, wp, data;
439	int i, l, rc;
440
441	wp = (addr & ~3); /* get lower word aligned address */
442
443	/*
444	* handle unaligned start bytes
445	*/
446	if ((l = addr - wp) != 0) {
447	data = 0;
448	for (i=0, cp=wp; i<l; ++i, ++cp) {
449	data = (data << 8) \| ((uchar )cp);
450	}
451	for (; i<4 && cnt>0; ++i) {
452	data = (data << 8) \| *src++;
453	--cnt;
454	++cp;
455	}
456	for (; cnt==0 && i<4; ++i, ++cp) {
457	data = (data << 8) \| ((uchar )cp);
458	}
459
460	if ((rc = write_word(info, wp, data)) != 0) {
461	return (rc);
462	}
463	wp += 4;
464	}
465
466	/*
467	* handle word aligned part
468	*/
469	while (cnt >= 4) {
470	data = 0;
471	for (i=0; i<4; ++i) {
472	data = (data << 8) \| *src++;
473	}
474	if ((rc = write_word(info, wp, data)) != 0) {
475	return (rc);
476	}
477	wp += 4;
478	cnt -= 4;
479	}
480
481	if (cnt == 0) {
482	return (0);
483	}
484
485	/*
486	* handle unaligned tail bytes
487	*/
488	data = 0;
489	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
490	data = (data << 8) \| *src++;
491	--cnt;
492	}
493	for (; i<4; ++i, ++cp) {
494	data = (data << 8) \| ((uchar )cp);
495	}
496
497	return (write_word(info, wp, data));
498	}
499
500	/*-----------------------------------------------------------------------
501	* Write a word to Flash, returns:
502	* 0 - OK
503	* 1 - write timeout
504	* 2 - Flash not erased
505	*/
506	static int write_word (flash_info_t *info, ulong dest, ulong data)
507	{
508	vu_long addr = (vu_long )(info->start[0]);
509	ulong start;
510	int flag;
511
512	/* Check if Flash is (sufficiently) erased */
513	if ((((vu_long )dest) & data) != data) {
514	return (2);
515	}
516	/* Disable interrupts which might cause a timeout here */
517	flag = disable_interrupts();
518
519	addr[0xAAA] = 0xAAAAAAAA;
520	addr[0x555] = 0x55555555;
521	addr[0xAAA] = 0xA0A0A0A0;
522
523	((vu_long )dest) = data;
524
525	/* re-enable interrupts if necessary */
526	if (flag)
527	enable_interrupts();
528
529	/* data polling for D7 */
530	start = get_timer (0);
531	while ((((vu_long )dest) & 0x80808080) != (data & 0x80808080)) {
532	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
533	return (1);
534	}
535	}
536	return (0);
537	}
538
539	/*-----------------------------------------------------------------------
540	*/