[people/ms/u-boot.git] / board / siemens / CCM / flash.c

/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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 <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, size_b1;
	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 */

	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_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);
	}

	size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);

	if (size_b1 > size_b0) {
		printf ("## ERROR: "
			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
			size_b1, size_b1<<20,
			size_b0, size_b0<<20
		);
		flash_info[0].flash_id	= FLASH_UNKNOWN;
		flash_info[1].flash_id	= FLASH_UNKNOWN;
		flash_info[0].sector_count	= -1;
		flash_info[1].sector_count	= -1;
		flash_info[0].size		= 0;
		flash_info[1].size		= 0;
		return (0);
	}

	/* 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;

	/* 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]);

#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	/* monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CFG_MONITOR_BASE,
		      CFG_MONITOR_BASE+monitor_flash_len-1,
		      &flash_info[0]);
#endif

	if (size_b1) {
		memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
		memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) |
				    BR_MS_GPCM | BR_V;

		/* Re-do sizing to get full correct info */
		size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
					  &flash_info[1]);

		flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);

#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
		/* monitor protection ON by default */
		flash_protect(FLAG_PROTECT_SET,
			      CFG_MONITOR_BASE,
			      CFG_MONITOR_BASE+monitor_flash_len-1,
			      &flash_info[1]);
#endif
	} else {
		memctl->memc_br1 = 0;		/* invalidate bank */

		flash_info[1].flash_id = FLASH_UNKNOWN;
		flash_info[1].sector_count = -1;
	}

	flash_info[0].size = size_b0;
	flash_info[1].size = size_b1;

	return (size_b0 + size_b1);
}

/*-----------------------------------------------------------------------
 */
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 + 0x00008000;
		info->start[2] = base + 0x0000C000;
		info->start[3] = base + 0x00010000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x00060000;
		}
	} else {
		/* set sector offsets for top boot block type		*/
		i = info->sector_count - 1;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}
	}

}

/*-----------------------------------------------------------------------
 */
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[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00900090;

	value = addr[0];

	switch (value) {
	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[1];			/* device ID		*/

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

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

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

	case AMD_ID_LV800B:
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

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

	case AMD_ID_LV160B:
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/
#if 0	/* enable when device IDs are available */
	case AMD_ID_LV320T:
		info->flash_id += FLASH_AM320T;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

	case AMD_ID_LV320B:
		info->flash_id += FLASH_AM320B;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/
#endif
	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 + 0x00008000;
		info->start[2] = base + 0x0000C000;
		info->start[3] = base + 0x00010000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x00060000;
		}
	} else {
		/* set sector offsets for top boot block type		*/
		i = info->sector_count - 1;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}
	}

	/* 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[2] & 1;
	}

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

		*addr = 0x00F000F0;	/* 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;

	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[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00800080;
	addr[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;

	/* 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] = 0x00300030;
			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] & 0x00800080) != 0x00800080) {
		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 = (volatile unsigned long *)info->start[0];
	addr[0] = 0x00F000F0;	/* 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[0x0555] = 0x00AA00AA;
	addr[0x02AA] = 0x00550055;
	addr[0x0555] = 0x00A000A0;

	*((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) & 0x00800080) != (data & 0x00800080)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
affae2bf WD	1	/*
	2	* (C) Copyright 2001
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	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 <common.h>
	25	#include <mpc8xx.h>
	26
	27	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	28
	29	/*-----------------------------------------------------------------------
	30	* Functions
	31	*/
	32	static ulong flash_get_size (vu_long addr, flash_info_t info);
	33	static int write_word (flash_info_t *info, ulong dest, ulong data);
	34	static void flash_get_offsets (ulong base, flash_info_t *info);
	35
	36	/*-----------------------------------------------------------------------
	37	*/
	38
	39	unsigned long flash_init (void)
	40	{
	41	volatile immap_t immap = (immap_t )CFG_IMMR;
	42	volatile memctl8xx_t *memctl = &immap->im_memctl;
	43	unsigned long size_b0, size_b1;
	44	int i;
	45
	46	/* Init: no FLASHes known */
	47	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
	48	flash_info[i].flash_id = FLASH_UNKNOWN;
	49	}
	50
	51	/* Static FLASH Bank configuration here - FIXME XXX */
	52
	53	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
	54
	55	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	56	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	57	size_b0, size_b0<<20);
	58	}
	59
	60	size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);
	61
	62	if (size_b1 > size_b0) {
	63	printf ("## ERROR: "
	64	"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
65	size_b1, size_b1<<20,
66	size_b0, size_b0<<20
67	);
68	flash_info[0].flash_id = FLASH_UNKNOWN;
69	flash_info[1].flash_id = FLASH_UNKNOWN;
70	flash_info[0].sector_count = -1;
71	flash_info[1].sector_count = -1;
72	flash_info[0].size = 0;
73	flash_info[1].size = 0;
74	return (0);
75	}
76
77	/* Remap FLASH according to real size */
78	memctl->memc_or0 = CFG_OR_TIMING_FLASH \| (-size_b0 & 0xFFFF8000);
79	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) \| BR_MS_GPCM \| BR_V;
80
81	/* Re-do sizing to get full correct info */
82	size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
83
84	flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]);
85
86	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
87	/* monitor protection ON by default */
88	flash_protect(FLAG_PROTECT_SET,
89	CFG_MONITOR_BASE,
3b57fe0a	90	CFG_MONITOR_BASE+monitor_flash_len-1,
affae2bf WD	91	&flash_info[0]);
	92	#endif
	93
	94	if (size_b1) {
	95	memctl->memc_or1 = CFG_OR_TIMING_FLASH \| (-size_b1 & 0xFFFF8000);
	96	memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) \|
	97	BR_MS_GPCM \| BR_V;
	98
	99	/* Re-do sizing to get full correct info */
	100	size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0),
	101	&flash_info[1]);
	102
	103	flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]);
	104
	105	#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
	106	/* monitor protection ON by default */
	107	flash_protect(FLAG_PROTECT_SET,
	108	CFG_MONITOR_BASE,
3b57fe0a	109	CFG_MONITOR_BASE+monitor_flash_len-1,
affae2bf WD	110	&flash_info[1]);
	111	#endif
	112	} else {
	113	memctl->memc_br1 = 0; /* invalidate bank */
	114
	115	flash_info[1].flash_id = FLASH_UNKNOWN;
	116	flash_info[1].sector_count = -1;
	117	}
	118
	119	flash_info[0].size = size_b0;
	120	flash_info[1].size = size_b1;
	121
	122	return (size_b0 + size_b1);
	123	}
	124
	125	/*-----------------------------------------------------------------------
	126	*/
	127	static void flash_get_offsets (ulong base, flash_info_t *info)
	128	{
	129	int i;
	130
	131	/* set up sector start address table */
	132	if (info->flash_id & FLASH_BTYPE) {
	133	/* set sector offsets for bottom boot block type */
	134	info->start[0] = base + 0x00000000;
	135	info->start[1] = base + 0x00008000;
	136	info->start[2] = base + 0x0000C000;
	137	info->start[3] = base + 0x00010000;
	138	for (i = 4; i < info->sector_count; i++) {
	139	info->start[i] = base + (i * 0x00020000) - 0x00060000;
	140	}
	141	} else {
	142	/* set sector offsets for top boot block type */
	143	i = info->sector_count - 1;
	144	info->start[i--] = base + info->size - 0x00008000;
	145	info->start[i--] = base + info->size - 0x0000C000;
	146	info->start[i--] = base + info->size - 0x00010000;
	147	for (; i >= 0; i--) {
	148	info->start[i] = base + i * 0x00020000;
	149	}
	150	}
	151
	152	}
	153
	154	/*-----------------------------------------------------------------------
	155	*/
	156	void flash_print_info (flash_info_t *info)
	157	{
	158	int i;
	159
	160	if (info->flash_id == FLASH_UNKNOWN) {
	161	printf ("missing or unknown FLASH type\n");
	162	return;
	163	}
	164
	165	switch (info->flash_id & FLASH_VENDMASK) {
	166	case FLASH_MAN_AMD: printf ("AMD "); break;
	167	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	168	default: printf ("Unknown Vendor "); break;
	169	}
	170
	171	switch (info->flash_id & FLASH_TYPEMASK) {
	172	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	173	break;
174	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
175	break;
176	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
177	break;
178	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
179	break;
180	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
181	break;
182	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
183	break;
184	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
185	break;
186	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
187	break;
188	default: printf ("Unknown Chip Type\n");
189	break;
190	}
191
192	printf (" Size: %ld MB in %d Sectors\n",
193	info->size >> 20, info->sector_count);
194
195	printf (" Sector Start Addresses:");
196	for (i=0; i<info->sector_count; ++i) {
197	if ((i % 5) == 0)
198	printf ("\n ");
199	printf (" %08lX%s",
200	info->start[i],
201	info->protect[i] ? " (RO)" : " "
202	);
203	}
204	printf ("\n");
205	return;
206	}
207
208	/*-----------------------------------------------------------------------
209	*/
210
211
212	/*-----------------------------------------------------------------------
213	*/
214
215	/*
216	* The following code cannot be run from FLASH!
217	*/
218
219	static ulong flash_get_size (vu_long addr, flash_info_t info)
220	{
221	short i;
222	ulong value;
223	ulong base = (ulong)addr;
224
225
226	/* Write auto select command: read Manufacturer ID */
227	addr[0x0555] = 0x00AA00AA;
228	addr[0x02AA] = 0x00550055;
229	addr[0x0555] = 0x00900090;
230
231	value = addr[0];
232
233	switch (value) {
234	case AMD_MANUFACT:
235	info->flash_id = FLASH_MAN_AMD;
236	break;
237	case FUJ_MANUFACT:
238	info->flash_id = FLASH_MAN_FUJ;
239	break;
240	default:
241	info->flash_id = FLASH_UNKNOWN;
242	info->sector_count = 0;
243	info->size = 0;
244	return (0); /* no or unknown flash */
245	}
246
247	value = addr[1]; /* device ID */
248
249	switch (value) {
250	case AMD_ID_LV400T:
251	info->flash_id += FLASH_AM400T;
252	info->sector_count = 11;
253	info->size = 0x00100000;
254	break; /* => 1 MB */
255
256	case AMD_ID_LV400B:
257	info->flash_id += FLASH_AM400B;
258	info->sector_count = 11;
259	info->size = 0x00100000;
260	break; /* => 1 MB */
261
262	case AMD_ID_LV800T:
263	info->flash_id += FLASH_AM800T;
264	info->sector_count = 19;
265	info->size = 0x00200000;
266	break; /* => 2 MB */
267
268	case AMD_ID_LV800B:
269	info->flash_id += FLASH_AM800B;
270	info->sector_count = 19;
271	info->size = 0x00200000;
272	break; /* => 2 MB */
273
274	case AMD_ID_LV160T:
275	info->flash_id += FLASH_AM160T;
276	info->sector_count = 35;
277	info->size = 0x00400000;
278	break; /* => 4 MB */
279
280	case AMD_ID_LV160B:
281	info->flash_id += FLASH_AM160B;
282	info->sector_count = 35;
283	info->size = 0x00400000;
284	break; /* => 4 MB */
285	#if 0 /* enable when device IDs are available */
286	case AMD_ID_LV320T:
287	info->flash_id += FLASH_AM320T;
288	info->sector_count = 67;
289	info->size = 0x00800000;
290	break; /* => 8 MB */
291
292	case AMD_ID_LV320B:
293	info->flash_id += FLASH_AM320B;
294	info->sector_count = 67;
295	info->size = 0x00800000;
296	break; /* => 8 MB */
297	#endif
298	default:
299	info->flash_id = FLASH_UNKNOWN;
300	return (0); /* => no or unknown flash */
301
302	}
303
304	/* set up sector start address table */
305	if (info->flash_id & FLASH_BTYPE) {
306	/* set sector offsets for bottom boot block type */
307	info->start[0] = base + 0x00000000;
308	info->start[1] = base + 0x00008000;
309	info->start[2] = base + 0x0000C000;
310	info->start[3] = base + 0x00010000;
311	for (i = 4; i < info->sector_count; i++) {
312	info->start[i] = base + (i * 0x00020000) - 0x00060000;
313	}
314	} else {
315	/* set sector offsets for top boot block type */
316	i = info->sector_count - 1;
317	info->start[i--] = base + info->size - 0x00008000;
318	info->start[i--] = base + info->size - 0x0000C000;
319	info->start[i--] = base + info->size - 0x00010000;
320	for (; i >= 0; i--) {
321	info->start[i] = base + i * 0x00020000;
322	}
323	}
324
325	/* check for protected sectors */
326	for (i = 0; i < info->sector_count; i++) {
327	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
328	/* D0 = 1 if protected */
329	addr = (volatile unsigned long *)(info->start[i]);
330	info->protect[i] = addr[2] & 1;
331	}
332
333	/*
334	* Prevent writes to uninitialized FLASH.
335	*/
336	if (info->flash_id != FLASH_UNKNOWN) {
337	addr = (volatile unsigned long *)info->start[0];
338
339	addr = 0x00F000F0; / reset bank */
340	}
341
342	return (info->size);
343	}
344
345
346	/*-----------------------------------------------------------------------
347	*/
348
349	int flash_erase (flash_info_t *info, int s_first, int s_last)
350	{
351	vu_long addr = (vu_long)(info->start[0]);
352	int flag, prot, sect, l_sect;
353	ulong start, now, last;
354
355	if ((s_first < 0) \|\| (s_first > s_last)) {
356	if (info->flash_id == FLASH_UNKNOWN) {
357	printf ("- missing\n");
358	} else {
359	printf ("- no sectors to erase\n");
360	}
361	return 1;
362	}
363
364	if ((info->flash_id == FLASH_UNKNOWN) \|\|
365	(info->flash_id > FLASH_AMD_COMP)) {
366	printf ("Can't erase unknown flash type %08lx - aborted\n",
367	info->flash_id);
368	return 1;
369	}
370
371	prot = 0;
372	for (sect=s_first; sect<=s_last; ++sect) {
373	if (info->protect[sect]) {
374	prot++;
375	}
376	}
377
378	if (prot) {
379	printf ("- Warning: %d protected sectors will not be erased!\n",
380	prot);
381	} else {
382	printf ("\n");
383	}
384
385	l_sect = -1;
386
387	/* Disable interrupts which might cause a timeout here */
388	flag = disable_interrupts();
389
390	addr[0x0555] = 0x00AA00AA;
391	addr[0x02AA] = 0x00550055;
392	addr[0x0555] = 0x00800080;
393	addr[0x0555] = 0x00AA00AA;
394	addr[0x02AA] = 0x00550055;
395
396	/* Start erase on unprotected sectors */
397	for (sect = s_first; sect<=s_last; sect++) {
398	if (info->protect[sect] == 0) { /* not protected */
399	addr = (vu_long*)(info->start[sect]);
400	addr[0] = 0x00300030;
401	l_sect = sect;
402	}
403	}
404
405	/* re-enable interrupts if necessary */
406	if (flag)
407	enable_interrupts();
408
409	/* wait at least 80us - let's wait 1 ms */
410	udelay (1000);
411
412	/*
413	* We wait for the last triggered sector
414	*/
415	if (l_sect < 0)
416	goto DONE;
417
418	start = get_timer (0);
419	last = start;
420	addr = (vu_long*)(info->start[l_sect]);
421	while ((addr[0] & 0x00800080) != 0x00800080) {
422	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
423	printf ("Timeout\n");
424	return 1;
425	}
426	/* show that we're waiting */
427	if ((now - last) > 1000) { /* every second */
428	putc ('.');
429	last = now;
430	}
431	}
432
433	DONE:
434	/* reset to read mode */
435	addr = (volatile unsigned long *)info->start[0];
436	addr[0] = 0x00F000F0; /* reset bank */
437
438	printf (" done\n");
439	return 0;
440	}
441
442	/*-----------------------------------------------------------------------
443	* Copy memory to flash, returns:
444	* 0 - OK
445	* 1 - write timeout
446	* 2 - Flash not erased
447	*/
448
449	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
450	{
451	ulong cp, wp, data;
452	int i, l, rc;
453
454	wp = (addr & ~3); /* get lower word aligned address */
455
456	/*
457	* handle unaligned start bytes
458	*/
459	if ((l = addr - wp) != 0) {
460	data = 0;
461	for (i=0, cp=wp; i<l; ++i, ++cp) {
462	data = (data << 8) \| ((uchar )cp);
463	}
464	for (; i<4 && cnt>0; ++i) {
465	data = (data << 8) \| *src++;
466	--cnt;
467	++cp;
468	}
469	for (; cnt==0 && i<4; ++i, ++cp) {
470	data = (data << 8) \| ((uchar )cp);
471	}
472
473	if ((rc = write_word(info, wp, data)) != 0) {
474	return (rc);
475	}
476	wp += 4;
477	}
478
479	/*
480	* handle word aligned part
481	*/
482	while (cnt >= 4) {
483	data = 0;
484	for (i=0; i<4; ++i) {
485	data = (data << 8) \| *src++;
486	}
487	if ((rc = write_word(info, wp, data)) != 0) {
488	return (rc);
489	}
490	wp += 4;
491	cnt -= 4;
492	}
493
494	if (cnt == 0) {
495	return (0);
496	}
497
498	/*
499	* handle unaligned tail bytes
500	*/
501	data = 0;
502	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
503	data = (data << 8) \| *src++;
504	--cnt;
505	}
506	for (; i<4; ++i, ++cp) {
507	data = (data << 8) \| ((uchar )cp);
508	}
509
510	return (write_word(info, wp, data));
511	}
512
513	/*-----------------------------------------------------------------------
514	* Write a word to Flash, returns:
515	* 0 - OK
516	* 1 - write timeout
517	* 2 - Flash not erased
518	*/
519	static int write_word (flash_info_t *info, ulong dest, ulong data)
520	{
521	vu_long addr = (vu_long)(info->start[0]);
522	ulong start;
523	int flag;
524
525	/* Check if Flash is (sufficiently) erased */
526	if ((((vu_long )dest) & data) != data) {
527	return (2);
528	}
529	/* Disable interrupts which might cause a timeout here */
530	flag = disable_interrupts();
531
532	addr[0x0555] = 0x00AA00AA;
533	addr[0x02AA] = 0x00550055;
534	addr[0x0555] = 0x00A000A0;
535
536	((vu_long )dest) = data;
537
538	/* re-enable interrupts if necessary */
539	if (flag)
540	enable_interrupts();
541
542	/* data polling for D7 */
543	start = get_timer (0);
544	while ((((vu_long )dest) & 0x00800080) != (data & 0x00800080)) {
545	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
546	return (1);
547	}
548	}
549	return (0);
550	}
551
552	/*-----------------------------------------------------------------------
553	*/