[people/ms/u-boot.git] / board / MAI / AmigaOneG3SE / flash_new.c

/*
 * (C) Copyright 2001
 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
 *
 * (C) Copyright 2002
 * 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 <flash.h>
#include <asm/io.h>
#include "memio.h"

/*---------------------------------------------------------------------*/
#undef DEBUG_FLASH

#ifdef DEBUG_FLASH
#define DEBUGF(fmt,args...) printf(fmt ,##args)
#else
#define DEBUGF(fmt,args...)
#endif
/*---------------------------------------------------------------------*/

flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

static ulong flash_get_size (ulong addr, flash_info_t *info);
static int flash_get_offsets (ulong base, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
static void flash_reset (ulong addr);

int flash_xd_nest;

static void flash_to_xd(void)
{
    unsigned char x;

    flash_xd_nest ++;

    if (flash_xd_nest == 1)
    {
	DEBUGF("Flash on XD\n");
	x = pci_read_cfg_byte(0, 0, 0x74);
	pci_write_cfg_byte(0, 0, 0x74, x|1);
    }
}

static void flash_to_mem(void)
{
    unsigned char x;

    flash_xd_nest --;

    if (flash_xd_nest == 0)
    {
	DEBUGF("Flash on memory bus\n");
	x = pci_read_cfg_byte(0, 0, 0x74);
	pci_write_cfg_byte(0, 0, 0x74, x&0xFE);
    }
}

unsigned long flash_init_old(void)
{
    int i;

    for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)
    {
	flash_info[i].flash_id = FLASH_UNKNOWN;
	flash_info[i].sector_count = 0;
	flash_info[i].size = 0;
    }


    return 1;
}

unsigned long flash_init (void)
{
	unsigned int i;
	unsigned long flash_size = 0;

	flash_xd_nest = 0;

	flash_to_xd();

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

	DEBUGF("\n## Get flash size @ 0x%08x\n", CONFIG_SYS_FLASH_BASE);

	flash_size = flash_get_size (CONFIG_SYS_FLASH_BASE, flash_info);

	DEBUGF("## Flash bank size: %08lx\n", flash_size);

	if (flash_size) {
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE && \
    CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_MAX_SIZE
		/* monitor protection ON by default */
		flash_protect(FLAG_PROTECT_SET,
			      CONFIG_SYS_MONITOR_BASE,
			      CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
			      &flash_info[0]);
#endif

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

	} else {
		puts ("Warning: the BOOT Flash is not initialised !");
	}

	flash_to_mem();

	return flash_size;
}

/*
 * The following code cannot be run from FLASH!
 */
static ulong flash_get_size (ulong addr, flash_info_t *info)
{
	short i;
	uchar value;
	uchar *x = (uchar *)addr;

	flash_to_xd();

	/* Write auto select command: read Manufacturer ID */
	x[0x0555] =  0xAA;
	__asm volatile ("sync\n eieio");
	x[0x02AA] =  0x55;
	__asm volatile ("sync\n eieio");
	x[0x0555] =  0x90;
	__asm volatile ("sync\n eieio");

	value = x[0];
	__asm volatile ("sync\n eieio");

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

	switch (value | (value << 16)) {
		case AMD_MANUFACT:
			info->flash_id = FLASH_MAN_AMD;
			break;

		case FUJ_MANUFACT:
			info->flash_id = FLASH_MAN_FUJ;
			break;

		case STM_MANUFACT:
			info->flash_id = FLASH_MAN_STM;
			break;

		default:
			info->flash_id = FLASH_UNKNOWN;
			info->sector_count = 0;
			info->size = 0;
			flash_reset (addr);
			return 0;
	}

	value = x[1];
	__asm volatile ("sync\n eieio");

	DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr+1, value);

	switch (value) {
		case AMD_ID_F040B:
			DEBUGF("Am29F040B\n");
			info->flash_id += FLASH_AM040;
			info->sector_count = 8;
			info->size = 0x00080000;
			break;			/* => 512 kB		*/

		case AMD_ID_LV040B:
			DEBUGF("Am29LV040B\n");
			info->flash_id += FLASH_AM040;
			info->sector_count = 8;
			info->size = 0x00080000;
			break;			/* => 512 kB		*/

		case AMD_ID_LV400T:
			DEBUGF("Am29LV400T\n");
			info->flash_id += FLASH_AM400T;
			info->sector_count = 11;
			info->size = 0x00100000;
			break;			/* => 1 MB		*/

		case AMD_ID_LV400B:
			DEBUGF("Am29LV400B\n");
			info->flash_id += FLASH_AM400B;
			info->sector_count = 11;
			info->size = 0x00100000;
			break;			/* => 1 MB		*/

		case AMD_ID_LV800T:
			DEBUGF("Am29LV800T\n");
			info->flash_id += FLASH_AM800T;
			info->sector_count = 19;
			info->size = 0x00200000;
			break;			/* => 2 MB		*/

		case AMD_ID_LV800B:
			DEBUGF("Am29LV400B\n");
			info->flash_id += FLASH_AM800B;
			info->sector_count = 19;
			info->size = 0x00200000;
			break;			/* => 2 MB		*/

		case AMD_ID_LV160T:
			DEBUGF("Am29LV160T\n");
			info->flash_id += FLASH_AM160T;
			info->sector_count = 35;
			info->size = 0x00400000;
			break;			/* => 4 MB		*/

		case AMD_ID_LV160B:
			DEBUGF("Am29LV160B\n");
			info->flash_id += FLASH_AM160B;
			info->sector_count = 35;
			info->size = 0x00400000;
			break;			/* => 4 MB		*/

		case AMD_ID_LV320T:
			DEBUGF("Am29LV320T\n");
			info->flash_id += FLASH_AM320T;
			info->sector_count = 67;
			info->size = 0x00800000;
			break;			/* => 8 MB		*/

#if 0
		/* Has the same ID as AMD_ID_LV320T, to be fixed */
		case AMD_ID_LV320B:
			DEBUGF("Am29LV320B\n");
			info->flash_id += FLASH_AM320B;
			info->sector_count = 67;
			info->size = 0x00800000;
			break;			/* => 8 MB		*/
#endif

		case AMD_ID_LV033C:
			DEBUGF("Am29LV033C\n");
			info->flash_id += FLASH_AM033C;
			info->sector_count = 64;
			info->size = 0x01000000;
			break;			/* => 16Mb		*/

		case STM_ID_F040B:
			DEBUGF("M29F040B\n");
			info->flash_id += FLASH_AM040;
			info->sector_count = 8;
			info->size = 0x00080000;
			break;			/* => 512 kB		*/

		default:
			info->flash_id = FLASH_UNKNOWN;
			flash_reset (addr);
			flash_to_mem();
			return (0);		/* => no or unknown flash */

	}

	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
		printf ("** ERROR: sector count %d > max (%d) **\n",
			info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
		info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
	}

	if (! flash_get_offsets (addr, info)) {
		flash_reset (addr);
		flash_to_mem();
		return 0;
	}

	/* 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 */
		value = in8(info->start[i] + 2);
		iobarrier_rw();
		info->protect[i] = (value & 1) != 0;
	}

	/*
	 * Reset bank to read mode
	 */
	flash_reset (addr);

	flash_to_mem();

	return (info->size);
}

static int flash_get_offsets (ulong base, flash_info_t *info)
{
	unsigned int i;

	switch (info->flash_id & FLASH_TYPEMASK) {
		case FLASH_AM040:
			/* set sector offsets for uniform sector type	*/
			for (i = 0; i < info->sector_count; i++) {
				info->start[i] = base + i * info->size /
							    info->sector_count;
			}
			break;
		default:
			return 0;
	}

	return 1;
}

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

	flash_to_xd();

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

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

	out8(addr + 0x555, 0xAA);
	iobarrier_rw();
	out8(addr + 0x2AA, 0x55);
	iobarrier_rw();
	out8(addr + 0x555, 0x80);
	iobarrier_rw();
	out8(addr + 0x555, 0xAA);
	iobarrier_rw();
	out8(addr + 0x2AA, 0x55);
	iobarrier_rw();

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = info->start[sect];
			out8(addr, 0x30);
			iobarrier_rw();
			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 = info->start[l_sect];

	DEBUGF ("Start erase timeout: %d\n", CONFIG_SYS_FLASH_ERASE_TOUT);

	while ((in8(addr) & 0x80) != 0x80) {
		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			flash_reset (info->start[0]);
			flash_to_mem();
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			putc ('.');
			last = now;
		}
		iobarrier_rw();
	}

DONE:
	/* reset to read mode */
	flash_reset (info->start[0]);
	flash_to_mem();

	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;

	flash_to_xd();

	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) {
			flash_to_mem();
			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) {
			flash_to_mem();
			return (rc);
		}
		wp  += 4;
		cnt -= 4;
	}

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


	flash_to_mem();
	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)
{
	volatile ulong addr = info->start[0];
	ulong start;
	int i;

	flash_to_xd();

	/* Check if Flash is (sufficiently) erased */
	if ((in32(dest) & data) != data) {
		flash_to_mem();
		return (2);
	}

	/* write each byte out */
	for (i = 0; i < 4; i++) {
		char *data_ch = (char *)&data;
		int flag = disable_interrupts();

		out8(addr + 0x555, 0xAA);
		iobarrier_rw();
		out8(addr + 0x2AA, 0x55);
		iobarrier_rw();
		out8(addr + 0x555, 0xA0);
		iobarrier_rw();
		out8(dest+i, data_ch[i]);
		iobarrier_rw();

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

		/* data polling for D7 */
		start = get_timer (0);
		while ((in8(dest+i) & 0x80) != (data_ch[i] & 0x80)) {
			if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
				flash_reset (addr);
				flash_to_mem();
				return (1);
			}
			iobarrier_rw();
		}
	}

	flash_reset (addr);
	flash_to_mem();
	return (0);
}

/*
 * Reset bank to read mode
 */
static void flash_reset (ulong addr)
{
	flash_to_xd();
	out8(addr, 0xF0);	/* reset bank */
	iobarrier_rw();
	flash_to_mem();
}

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;
	case FLASH_MAN_BM:	printf ("BRIGHT MICRO ");	break;
	case FLASH_MAN_STM:	printf ("SGS THOMSON ");	break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:	printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
				break;
	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;
	}

	if (info->size % 0x100000 == 0) {
		printf ("  Size: %ld MB in %d Sectors\n",
			info->size / 0x100000, info->sector_count);
	} else if (info->size % 0x400 == 0) {
		printf ("  Size: %ld KB in %d Sectors\n",
			info->size / 0x400, info->sector_count);
	} else {
		printf ("  Size: %ld B in %d Sectors\n",
			info->size, 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");
}
Commit	Line	Data
c7de829c WD	1	/*
	2	* (C) Copyright 2001
	3	* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
	4	*
	5	* (C) Copyright 2002
	6	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	7	*
	8	* See file CREDITS for list of people who contributed to this
	9	* project.
	10	*
	11	* This program is free software; you can redistribute it and/or
	12	* modify it under the terms of the GNU General Public License as
	13	* published by the Free Software Foundation; either version 2 of
	14	* the License, or (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	24	* MA 02111-1307 USA
	25	*/
	26
	27	#include <common.h>
	28	#include <flash.h>
	29	#include <asm/io.h>
8bde7f77	30	#include "memio.h"
c7de829c WD	31
	32	/---------------------------------------------------------------------/
	33	#undef DEBUG_FLASH
c7de829c WD	34
	35	#ifdef DEBUG_FLASH
	36	#define DEBUGF(fmt,args...) printf(fmt ,##args)
	37	#else
	38	#define DEBUGF(fmt,args...)
	39	#endif
	40	/---------------------------------------------------------------------/
	41
6d0f6bcf	42	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
c7de829c WD	43
	44	static ulong flash_get_size (ulong addr, flash_info_t *info);
	45	static int flash_get_offsets (ulong base, flash_info_t *info);
	46	static int write_word (flash_info_t *info, ulong dest, ulong data);
	47	static void flash_reset (ulong addr);
	48
	49	int flash_xd_nest;
	50
	51	static void flash_to_xd(void)
	52	{
	53	unsigned char x;
	54
	55	flash_xd_nest ++;
	56
	57	if (flash_xd_nest == 1)
	58	{
	59	DEBUGF("Flash on XD\n");
	60	x = pci_read_cfg_byte(0, 0, 0x74);
	61	pci_write_cfg_byte(0, 0, 0x74, x\|1);
	62	}
	63	}
	64
	65	static void flash_to_mem(void)
	66	{
	67	unsigned char x;
	68
	69	flash_xd_nest --;
8bde7f77	70
c7de829c WD	71	if (flash_xd_nest == 0)
	72	{
	73	DEBUGF("Flash on memory bus\n");
	74	x = pci_read_cfg_byte(0, 0, 0x74);
	75	pci_write_cfg_byte(0, 0, 0x74, x&0xFE);
	76	}
	77	}
	78
	79	unsigned long flash_init_old(void)
	80	{
	81	int i;
	82
6d0f6bcf	83	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++)
c7de829c WD	84	{
	85	flash_info[i].flash_id = FLASH_UNKNOWN;
	86	flash_info[i].sector_count = 0;
	87	flash_info[i].size = 0;
	88	}
	89
	90
	91	return 1;
	92	}
	93
	94	unsigned long flash_init (void)
	95	{
	96	unsigned int i;
	97	unsigned long flash_size = 0;
	98
	99	flash_xd_nest = 0;
	100
	101	flash_to_xd();
	102
	103	/* Init: no FLASHes known */
6d0f6bcf	104	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
c7de829c WD	105	flash_info[i].flash_id = FLASH_UNKNOWN;
	106	flash_info[i].sector_count = 0;
	107	flash_info[i].size = 0;
	108	}
	109
6d0f6bcf	110	DEBUGF("\n## Get flash size @ 0x%08x\n", CONFIG_SYS_FLASH_BASE);
c7de829c	111
6d0f6bcf	112	flash_size = flash_get_size (CONFIG_SYS_FLASH_BASE, flash_info);
c7de829c WD	113
	114	DEBUGF("## Flash bank size: %08lx\n", flash_size);
	115
	116	if (flash_size) {
6d0f6bcf JCPV	117	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE && \
6d0f6bcf JCPV	118	CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_MAX_SIZE
c7de829c WD	119	/* monitor protection ON by default */
c7de829c WD	120	flash_protect(FLAG_PROTECT_SET,
6d0f6bcf JCPV	121	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	122	CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
c7de829c WD	123	&flash_info[0]);
	124	#endif
	125
5a1aceb0	126	#ifdef CONFIG_ENV_IS_IN_FLASH
c7de829c WD	127	/* ENV protection ON by default */
c7de829c WD	128	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	129	CONFIG_ENV_ADDR,
0e8d1586 JCPV	130	CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
c7de829c WD	131	&flash_info[0]);
	132	#endif
	133
	134	} else {
	135	puts ("Warning: the BOOT Flash is not initialised !");
	136	}
	137
	138	flash_to_mem();
	139
	140	return flash_size;
	141	}
	142
	143	/*
	144	* The following code cannot be run from FLASH!
	145	*/
	146	static ulong flash_get_size (ulong addr, flash_info_t *info)
	147	{
	148	short i;
	149	uchar value;
	150	uchar x = (uchar )addr;
	151
	152	flash_to_xd();
	153
	154	/* Write auto select command: read Manufacturer ID */
	155	x[0x0555] = 0xAA;
	156	__asm volatile ("sync\n eieio");
	157	x[0x02AA] = 0x55;
	158	__asm volatile ("sync\n eieio");
	159	x[0x0555] = 0x90;
	160	__asm volatile ("sync\n eieio");
	161
	162	value = x[0];
	163	__asm volatile ("sync\n eieio");
	164
	165	DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, value);
	166
	167	switch (value \| (value << 16)) {
	168	case AMD_MANUFACT:
	169	info->flash_id = FLASH_MAN_AMD;
	170	break;
	171
	172	case FUJ_MANUFACT:
	173	info->flash_id = FLASH_MAN_FUJ;
	174	break;
	175
	176	case STM_MANUFACT:
	177	info->flash_id = FLASH_MAN_STM;
	178	break;
	179
	180	default:
	181	info->flash_id = FLASH_UNKNOWN;
	182	info->sector_count = 0;
	183	info->size = 0;
	184	flash_reset (addr);
	185	return 0;
	186	}
	187
	188	value = x[1];
	189	__asm volatile ("sync\n eieio");
	190
	191	DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr+1, value);
	192
	193	switch (value) {
	194	case AMD_ID_F040B:
195	DEBUGF("Am29F040B\n");
196	info->flash_id += FLASH_AM040;
197	info->sector_count = 8;
198	info->size = 0x00080000;
199	break; /* => 512 kB */
200
201	case AMD_ID_LV040B:
202	DEBUGF("Am29LV040B\n");
203	info->flash_id += FLASH_AM040;
204	info->sector_count = 8;
205	info->size = 0x00080000;
206	break; /* => 512 kB */
207
208	case AMD_ID_LV400T:
209	DEBUGF("Am29LV400T\n");
210	info->flash_id += FLASH_AM400T;
211	info->sector_count = 11;
212	info->size = 0x00100000;
213	break; /* => 1 MB */
214
215	case AMD_ID_LV400B:
216	DEBUGF("Am29LV400B\n");
217	info->flash_id += FLASH_AM400B;
218	info->sector_count = 11;
219	info->size = 0x00100000;
220	break; /* => 1 MB */
221
222	case AMD_ID_LV800T:
223	DEBUGF("Am29LV800T\n");
224	info->flash_id += FLASH_AM800T;
225	info->sector_count = 19;
226	info->size = 0x00200000;
227	break; /* => 2 MB */
228
229	case AMD_ID_LV800B:
230	DEBUGF("Am29LV400B\n");
231	info->flash_id += FLASH_AM800B;
232	info->sector_count = 19;
233	info->size = 0x00200000;
234	break; /* => 2 MB */
235
236	case AMD_ID_LV160T:
237	DEBUGF("Am29LV160T\n");
238	info->flash_id += FLASH_AM160T;
239	info->sector_count = 35;
240	info->size = 0x00400000;
241	break; /* => 4 MB */
242
243	case AMD_ID_LV160B:
244	DEBUGF("Am29LV160B\n");
245	info->flash_id += FLASH_AM160B;
246	info->sector_count = 35;
247	info->size = 0x00400000;
248	break; /* => 4 MB */
249
250	case AMD_ID_LV320T:
251	DEBUGF("Am29LV320T\n");
252	info->flash_id += FLASH_AM320T;
253	info->sector_count = 67;
254	info->size = 0x00800000;
255	break; /* => 8 MB */
256
257	#if 0
258	/* Has the same ID as AMD_ID_LV320T, to be fixed */
259	case AMD_ID_LV320B:
260	DEBUGF("Am29LV320B\n");
261	info->flash_id += FLASH_AM320B;
262	info->sector_count = 67;
263	info->size = 0x00800000;
264	break; /* => 8 MB */
265	#endif
266
267	case AMD_ID_LV033C:
268	DEBUGF("Am29LV033C\n");
269	info->flash_id += FLASH_AM033C;
270	info->sector_count = 64;
271	info->size = 0x01000000;
272	break; /* => 16Mb */
273
274	case STM_ID_F040B:
275	DEBUGF("M29F040B\n");
276	info->flash_id += FLASH_AM040;
277	info->sector_count = 8;
278	info->size = 0x00080000;
279	break; /* => 512 kB */
280
281	default:
282	info->flash_id = FLASH_UNKNOWN;
283	flash_reset (addr);
284	flash_to_mem();
285	return (0); /* => no or unknown flash */
286
287	}
288
6d0f6bcf	289	if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
c7de829c	290	printf (" ERROR: sector count %d > max (%d) \n",
6d0f6bcf JCPV	291	info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
6d0f6bcf JCPV	292	info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
c7de829c WD	293	}
	294
	295	if (! flash_get_offsets (addr, info)) {
	296	flash_reset (addr);
	297	flash_to_mem();
	298	return 0;
	299	}
	300
	301	/* check for protected sectors */
	302	for (i = 0; i < info->sector_count; i++) {
	303	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	304	/* D0 = 1 if protected */
	305	value = in8(info->start[i] + 2);
	306	iobarrier_rw();
	307	info->protect[i] = (value & 1) != 0;
	308	}
	309
	310	/*
	311	* Reset bank to read mode
	312	*/
	313	flash_reset (addr);
	314
	315	flash_to_mem();
	316
	317	return (info->size);
	318	}
	319
	320	static int flash_get_offsets (ulong base, flash_info_t *info)
	321	{
	322	unsigned int i;
	323
	324	switch (info->flash_id & FLASH_TYPEMASK) {
	325	case FLASH_AM040:
	326	/* set sector offsets for uniform sector type */
	327	for (i = 0; i < info->sector_count; i++) {
	328	info->start[i] = base + i * info->size /
8bde7f77	329	info->sector_count;
c7de829c WD	330	}
	331	break;
	332	default:
	333	return 0;
	334	}
	335
	336	return 1;
	337	}
	338
	339	int flash_erase (flash_info_t *info, int s_first, int s_last)
	340	{
	341	volatile ulong addr = info->start[0];
	342	int flag, prot, sect, l_sect;
	343	ulong start, now, last;
	344
	345	flash_to_xd();
	346
	347	if (s_first < 0 \|\| s_first > s_last) {
	348	if (info->flash_id == FLASH_UNKNOWN) {
	349	printf ("- missing\n");
	350	} else {
	351	printf ("- no sectors to erase\n");
	352	}
	353	flash_to_mem();
	354	return 1;
	355	}
	356
	357	if (info->flash_id == FLASH_UNKNOWN) {
	358	printf ("Can't erase unknown flash type %08lx - aborted\n",
	359	info->flash_id);
	360	flash_to_mem();
	361	return 1;
	362	}
	363
	364	prot = 0;
	365	for (sect=s_first; sect<=s_last; ++sect) {
	366	if (info->protect[sect]) {
	367	prot++;
	368	}
	369	}
	370
	371	if (prot) {
	372	printf ("- Warning: %d protected sectors will not be erased!\n",
	373	prot);
	374	} else {
	375	printf ("\n");
	376	}
	377
	378	l_sect = -1;
	379
	380	/* Disable interrupts which might cause a timeout here */
	381	flag = disable_interrupts();
	382
	383	out8(addr + 0x555, 0xAA);
	384	iobarrier_rw();
	385	out8(addr + 0x2AA, 0x55);
	386	iobarrier_rw();
	387	out8(addr + 0x555, 0x80);
	388	iobarrier_rw();
	389	out8(addr + 0x555, 0xAA);
	390	iobarrier_rw();
	391	out8(addr + 0x2AA, 0x55);
	392	iobarrier_rw();
	393
394	/* Start erase on unprotected sectors */
395	for (sect = s_first; sect<=s_last; sect++) {
396	if (info->protect[sect] == 0) { /* not protected */
397	addr = info->start[sect];
398	out8(addr, 0x30);
399	iobarrier_rw();
400	l_sect = sect;
401	}
402	}
403
404	/* re-enable interrupts if necessary */
405	if (flag)
406	enable_interrupts();
407
408	/* wait at least 80us - let's wait 1 ms */
409	udelay (1000);
410
411	/*
412	* We wait for the last triggered sector
413	*/
414	if (l_sect < 0)
415	goto DONE;
416
417	start = get_timer (0);
418	last = start;
419	addr = info->start[l_sect];
420
6d0f6bcf	421	DEBUGF ("Start erase timeout: %d\n", CONFIG_SYS_FLASH_ERASE_TOUT);
c7de829c WD	422
c7de829c WD	423	while ((in8(addr) & 0x80) != 0x80) {
6d0f6bcf	424	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
c7de829c WD	425	printf ("Timeout\n");
	426	flash_reset (info->start[0]);
	427	flash_to_mem();
	428	return 1;
	429	}
	430	/* show that we're waiting */
	431	if ((now - last) > 1000) { /* every second */
	432	putc ('.');
	433	last = now;
	434	}
	435	iobarrier_rw();
	436	}
	437
	438	DONE:
	439	/* reset to read mode */
	440	flash_reset (info->start[0]);
	441	flash_to_mem();
	442
	443	printf (" done\n");
	444	return 0;
	445	}
	446
	447	/*
	448	* Copy memory to flash, returns:
	449	* 0 - OK
	450	* 1 - write timeout
	451	* 2 - Flash not erased
	452	*/
	453	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	454	{
	455	ulong cp, wp, data;
	456	int i, l, rc;
	457
	458	flash_to_xd();
	459
	460	wp = (addr & ~3); /* get lower word aligned address */
	461
	462	/*
	463	* handle unaligned start bytes
	464	*/
	465	if ((l = addr - wp) != 0) {
	466	data = 0;
	467	for (i=0, cp=wp; i<l; ++i, ++cp) {
	468	data = (data << 8) \| ((uchar )cp);
	469	}
	470	for (; i<4 && cnt>0; ++i) {
	471	data = (data << 8) \| *src++;
	472	--cnt;
	473	++cp;
	474	}
	475	for (; cnt==0 && i<4; ++i, ++cp) {
	476	data = (data << 8) \| ((uchar )cp);
	477	}
	478
	479	if ((rc = write_word(info, wp, data)) != 0) {
8bde7f77	480	flash_to_mem();
c7de829c WD	481	return (rc);
	482	}
	483	wp += 4;
	484	}
	485
	486	/*
	487	* handle word aligned part
	488	*/
	489	while (cnt >= 4) {
	490	data = 0;
	491	for (i=0; i<4; ++i) {
	492	data = (data << 8) \| *src++;
	493	}
	494	if ((rc = write_word(info, wp, data)) != 0) {
8bde7f77	495	flash_to_mem();
c7de829c WD	496	return (rc);
	497	}
	498	wp += 4;
	499	cnt -= 4;
	500	}
	501
	502	if (cnt == 0) {
	503	flash_to_mem();
	504	return (0);
	505	}
	506
	507	/*
	508	* handle unaligned tail bytes
	509	*/
	510	data = 0;
	511	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
	512	data = (data << 8) \| *src++;
	513	--cnt;
	514	}
	515	for (; i<4; ++i, ++cp) {
	516	data = (data << 8) \| ((uchar )cp);
	517	}
	518
	519
	520	flash_to_mem();
	521	return (write_word(info, wp, data));
	522	}
	523
	524	/*
	525	* Write a word to Flash, returns:
	526	* 0 - OK
	527	* 1 - write timeout
	528	* 2 - Flash not erased
	529	*/
	530	static int write_word (flash_info_t *info, ulong dest, ulong data)
	531	{
	532	volatile ulong addr = info->start[0];
	533	ulong start;
	534	int i;
	535
	536	flash_to_xd();
	537
	538	/* Check if Flash is (sufficiently) erased */
	539	if ((in32(dest) & data) != data) {
	540	flash_to_mem();
	541	return (2);
	542	}
	543
	544	/* write each byte out */
	545	for (i = 0; i < 4; i++) {
	546	char data_ch = (char )&data;
	547	int flag = disable_interrupts();
	548
	549	out8(addr + 0x555, 0xAA);
	550	iobarrier_rw();
	551	out8(addr + 0x2AA, 0x55);
	552	iobarrier_rw();
	553	out8(addr + 0x555, 0xA0);
	554	iobarrier_rw();
	555	out8(dest+i, data_ch[i]);
	556	iobarrier_rw();
	557
	558	/* re-enable interrupts if necessary */
	559	if (flag)
560	enable_interrupts();
561
562	/* data polling for D7 */
563	start = get_timer (0);
564	while ((in8(dest+i) & 0x80) != (data_ch[i] & 0x80)) {
6d0f6bcf	565	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
c7de829c WD	566	flash_reset (addr);
	567	flash_to_mem();
	568	return (1);
	569	}
	570	iobarrier_rw();
	571	}
	572	}
	573
	574	flash_reset (addr);
	575	flash_to_mem();
	576	return (0);
	577	}
	578
	579	/*
	580	* Reset bank to read mode
	581	*/
	582	static void flash_reset (ulong addr)
	583	{
8bde7f77	584	flash_to_xd();
c7de829c WD	585	out8(addr, 0xF0); /* reset bank */
	586	iobarrier_rw();
	587	flash_to_mem();
	588	}
	589
	590	void flash_print_info (flash_info_t *info)
	591	{
	592	int i;
	593
	594	if (info->flash_id == FLASH_UNKNOWN) {
	595	printf ("missing or unknown FLASH type\n");
	596	return;
	597	}
	598
	599	switch (info->flash_id & FLASH_VENDMASK) {
	600	case FLASH_MAN_AMD: printf ("AMD "); break;
	601	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	602	case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
	603	case FLASH_MAN_STM: printf ("SGS THOMSON "); break;
	604	default: printf ("Unknown Vendor "); break;
	605	}
	606
	607	switch (info->flash_id & FLASH_TYPEMASK) {
	608	case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
	609	break;
	610	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	611	break;
	612	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	613	break;
	614	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	615	break;
	616	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	617	break;
	618	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	619	break;
	620	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
	621	break;
	622	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
	623	break;
	624	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
	625	break;
	626	default: printf ("Unknown Chip Type\n");
	627	break;
	628	}
	629
	630	if (info->size % 0x100000 == 0) {
	631	printf (" Size: %ld MB in %d Sectors\n",
	632	info->size / 0x100000, info->sector_count);
	633	} else if (info->size % 0x400 == 0) {
	634	printf (" Size: %ld KB in %d Sectors\n",
8bde7f77	635	info->size / 0x400, info->sector_count);
c7de829c WD	636	} else {
c7de829c WD	637	printf (" Size: %ld B in %d Sectors\n",
8bde7f77	638	info->size, info->sector_count);
c7de829c WD	639	}
	640
	641	printf (" Sector Start Addresses:");
	642	for (i=0; i<info->sector_count; ++i) {
	643	if ((i % 5) == 0)
	644	printf ("\n ");
	645	printf (" %08lX%s",
	646	info->start[i],
	647	info->protect[i] ? " (RO)" : " "
	648	);
	649	}
	650	printf ("\n");
	651	}