[people/ms/u-boot.git] / board / sl8245 / flash.c

/*
 * (C) Copyright 2001 - 2003
 * 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 <mpc824x.h>
#include <asm/processor.h>

#if defined(CONFIG_ENV_IS_IN_FLASH)
# ifndef  CONFIG_ENV_ADDR
#  define CONFIG_ENV_ADDR	(CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
# endif
# ifndef  CONFIG_ENV_SIZE
#  define CONFIG_ENV_SIZE	CONFIG_ENV_SECT_SIZE
# endif
# ifndef  CONFIG_ENV_SECT_SIZE
#  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
# endif
#endif

#define FLASH_BANK_SIZE 0x800000
#define MAIN_SECT_SIZE  0x40000
#define PARAM_SECT1_SIZE 0x20000
#define PARAM_SECT23_SIZE 0x8000
#define PARAM_SECT4_SIZE 0x10000

flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

static int write_data (flash_info_t *info, ulong dest, ulong *data);
static void write_via_fpu(vu_long *addr, ulong *data);
static __inline__ unsigned long get_msr(void);
static __inline__ void set_msr(unsigned long msr);

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

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

#define __align__ __attribute__ ((aligned (8)))
static __align__ ulong precmd0[2]   = { 0x00aa00aa, 0x00aa00aa };
static __align__ ulong precmd1[2]   = { 0x00550055, 0x00550055 };
static __align__ ulong cmdid[2]     = { 0x00900090, 0x00900090 };
static __align__ ulong cmderase[2]  = { 0x00800080, 0x00800080 };
static __align__ ulong cmdersusp[2] = { 0x00b000b0, 0x00b000b0 };
static __align__ ulong cmdsecter[2] = { 0x00300030, 0x00300030 };
static __align__ ulong cmdprog[2]   = { 0x00a000a0, 0x00a000a0 };
static __align__ ulong cmdres[2]    = { 0x00f000f0, 0x00f000f0 };

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

unsigned long flash_init (void)
{
	int i, j;
	ulong size = 0;

	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
		vu_long *addr = (vu_long *) (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE);

		write_via_fpu (&addr[0xaaa], precmd0);
		write_via_fpu (&addr[0x554], precmd1);
		write_via_fpu (&addr[0xaaa], cmdid);

		DEBUGF ("Flash bank # %d:\n"
			"\tManuf. ID @ 0x%08lX: 0x%08lX\n"
			"\tDevice ID @ 0x%08lX: 0x%08lX\n",
			i,
			(ulong) (&addr[0]), addr[0],
			(ulong) (&addr[2]), addr[2]);

		if ((addr[0] == addr[1]) && (addr[0] == AMD_MANUFACT) &&
			(addr[2] == addr[3]) && (addr[2] == AMD_ID_LV160T)) {
			flash_info[i].flash_id = (FLASH_MAN_AMD & FLASH_VENDMASK) |
					(FLASH_AM160T & FLASH_TYPEMASK);
		} else {
			flash_info[i].flash_id = FLASH_UNKNOWN;
			write_via_fpu (addr, cmdres);
			goto Done;
		}

		DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);

		write_via_fpu (addr, cmdres);

		flash_info[i].size = FLASH_BANK_SIZE;
		flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
		memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
		for (j = 0; j < 32; j++) {
			flash_info[i].start[j] = CONFIG_SYS_FLASH_BASE +
					i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE;
		}
		flash_info[i].start[32] =
				flash_info[i].start[31] + PARAM_SECT1_SIZE;
		flash_info[i].start[33] =
				flash_info[i].start[32] + PARAM_SECT23_SIZE;
		flash_info[i].start[34] =
				flash_info[i].start[33] + PARAM_SECT23_SIZE;
		size += flash_info[i].size;
	}

	/* Protect monitor and environment sectors
	 */
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
	flash_protect ( FLAG_PROTECT_SET,
			CONFIG_SYS_MONITOR_BASE,
			CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
			&flash_info[1]);
#else
	flash_protect ( FLAG_PROTECT_SET,
			CONFIG_SYS_MONITOR_BASE,
			CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
			&flash_info[0]);
#endif
#endif

#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
#if CONFIG_ENV_ADDR >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
	flash_protect ( FLAG_PROTECT_SET,
			CONFIG_ENV_ADDR,
			CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[1]);
#else
	flash_protect ( FLAG_PROTECT_SET,
			CONFIG_ENV_ADDR,
			CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
#endif
#endif

Done:
	return size;
}

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

	switch ((i = info->flash_id & FLASH_VENDMASK)) {
	case (FLASH_MAN_AMD & FLASH_VENDMASK):
		printf ("Intel: ");
		break;
	default:
		printf ("Unknown Vendor 0x%04x ", i);
		break;
	}

	switch ((i = info->flash_id & FLASH_TYPEMASK)) {
	case (FLASH_AM160T & FLASH_TYPEMASK):
		printf ("AM29LV160BT (16Mbit)\n");
		break;
	default:
		printf ("Unknown Chip Type 0x%04x\n", i);
		goto Done;
		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");

  Done:
	return;
}

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

int flash_erase (flash_info_t * info, int s_first, int s_last)
{
	int flag, prot, sect;
	ulong start, now, last;

	DEBUGF ("Erase flash bank %d sect %d ... %d\n",
		info - &flash_info[0], 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_VENDMASK) !=
		(FLASH_MAN_AMD & FLASH_VENDMASK)) {
		printf ("Can erase only AMD flash types - aborted\n");
		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");
	}

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

			DEBUGF ("Erase sect %d @ 0x%08lX\n", sect, (ulong) addr);

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

			write_via_fpu (&addr[0xaaa], precmd0);
			write_via_fpu (&addr[0x554], precmd1);
			write_via_fpu (&addr[0xaaa], cmderase);
			write_via_fpu (&addr[0xaaa], precmd0);
			write_via_fpu (&addr[0x554], precmd1);
			write_via_fpu (&addr[0xaaa], cmdsecter);

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

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

			while (((addr[0] & 0x00800080) != 0x00800080) ||
				   ((addr[1] & 0x00800080) != 0x00800080)) {
				if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					write_via_fpu (addr, cmdersusp);
					write_via_fpu (addr, cmdres);
					return 1;
				}

				/* show that we're waiting */
				if ((now - last) > 1000) {	/* every second  */
					putc ('.');
					last = now;
				}
			}

			write_via_fpu (addr, cmdres);
		}
	}
	printf (" done\n");
	return 0;
}

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

#define	FLASH_WIDTH	8		/* flash bus width in bytes */

int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
	ulong wp, cp, msr;
	int l, rc, i;
	ulong data[2];
	ulong *datah = &data[0];
	ulong *datal = &data[1];

	DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n",
		addr, (ulong) src, cnt);

	if (info->flash_id == FLASH_UNKNOWN) {
		return 4;
	}

	msr = get_msr ();
	set_msr (msr | MSR_FP);

	wp = (addr & ~(FLASH_WIDTH - 1));	/* get lower aligned address */

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - wp) != 0) {
		*datah = *datal = 0;

		for (i = 0, cp = wp; i < l; i++, cp++) {
			if (i >= 4) {
				*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
			}

			*datal = (*datal << 8) | (*(uchar *) cp);
		}
		for (; i < FLASH_WIDTH && cnt > 0; ++i) {
			char tmp;

			tmp = *src;

			src++;

			if (i >= 4) {
				*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
			}

			*datal = (*datal << 8) | tmp;

			--cnt;
			++cp;
		}

		for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) {
			if (i >= 4) {
				*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
			}

			*datal = (*datah << 8) | (*(uchar *) cp);
		}

		if ((rc = write_data (info, wp, data)) != 0) {
			set_msr (msr);
			return (rc);
		}

		wp += FLASH_WIDTH;
	}

	/*
	 * handle FLASH_WIDTH aligned part
	 */
	while (cnt >= FLASH_WIDTH) {
		*datah = *(ulong *) src;
		*datal = *(ulong *) (src + 4);
		if ((rc = write_data (info, wp, data)) != 0) {
			set_msr (msr);
			return (rc);
		}
		wp += FLASH_WIDTH;
		cnt -= FLASH_WIDTH;
		src += FLASH_WIDTH;
	}

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

	/*
	 * handle unaligned tail bytes
	 */
	*datah = *datal = 0;
	for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
		char tmp;

		tmp = *src;

		src++;

		if (i >= 4) {
			*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
		}

		*datal = (*datal << 8) | tmp;

		--cnt;
	}

	for (; i < FLASH_WIDTH; ++i, ++cp) {
		if (i >= 4) {
			*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
		}

		*datal = (*datal << 8) | (*(uchar *) cp);
	}

	rc = write_data (info, wp, data);
	set_msr (msr);

	return (rc);
}

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

	/* Check if Flash is (sufficiently) erased */
	if (((addr[0] & data[0]) != data[0]) ||
		((addr[1] & data[1]) != data[1])) {
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts ();

	write_via_fpu (&chip[0xaaa], precmd0);
	write_via_fpu (&chip[0x554], precmd1);
	write_via_fpu (&chip[0xaaa], cmdprog);
	write_via_fpu (addr, data);

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

	start = get_timer (0);

	while (((addr[0] & 0x00800080) != (data[0] & 0x00800080)) ||
	       ((addr[1] & 0x00800080) != (data[1] & 0x00800080))) {
		if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
			write_via_fpu (chip, cmdres);
			return (1);
		}
	}

	write_via_fpu (chip, cmdres);

	return (0);
}

/*-----------------------------------------------------------------------
 */
static void write_via_fpu (vu_long * addr, ulong * data)
{
	__asm__ __volatile__ ("lfd  1, 0(%0)"::"r" (data));
	__asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
}

/*-----------------------------------------------------------------------
 */
static __inline__ unsigned long get_msr (void)
{
	unsigned long msr;

	__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);

	return msr;
}

static __inline__ void set_msr (unsigned long msr)
{
	__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
}
Commit	Line	Data
d1cbe85b WD	1	/*
	2	* (C) Copyright 2001 - 2003
	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 <mpc824x.h>
	26	#include <asm/processor.h>
	27
5a1aceb0	28	#if defined(CONFIG_ENV_IS_IN_FLASH)
0e8d1586	29	# ifndef CONFIG_ENV_ADDR
6d0f6bcf	30	# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
d1cbe85b	31	# endif
0e8d1586 JCPV	32	# ifndef CONFIG_ENV_SIZE
0e8d1586 JCPV	33	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
d1cbe85b	34	# endif
0e8d1586 JCPV	35	# ifndef CONFIG_ENV_SECT_SIZE
0e8d1586 JCPV	36	# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
d1cbe85b WD	37	# endif
	38	#endif
	39
	40	#define FLASH_BANK_SIZE 0x800000
	41	#define MAIN_SECT_SIZE 0x40000
	42	#define PARAM_SECT1_SIZE 0x20000
	43	#define PARAM_SECT23_SIZE 0x8000
	44	#define PARAM_SECT4_SIZE 0x10000
	45
6d0f6bcf	46	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
d1cbe85b WD	47
	48	static int write_data (flash_info_t info, ulong dest, ulong data);
	49	static void write_via_fpu(vu_long addr, ulong data);
	50	static __inline__ unsigned long get_msr(void);
	51	static __inline__ void set_msr(unsigned long msr);
	52
	53	/---------------------------------------------------------------------/
	54	#undef DEBUG_FLASH
	55
	56	/---------------------------------------------------------------------/
	57	#ifdef DEBUG_FLASH
	58	#define DEBUGF(fmt,args...) printf(fmt ,##args)
	59	#else
	60	#define DEBUGF(fmt,args...)
	61	#endif
	62	/---------------------------------------------------------------------/
	63
	64	#define __align__ __attribute__ ((aligned (8)))
	65	static __align__ ulong precmd0[2] = { 0x00aa00aa, 0x00aa00aa };
	66	static __align__ ulong precmd1[2] = { 0x00550055, 0x00550055 };
	67	static __align__ ulong cmdid[2] = { 0x00900090, 0x00900090 };
	68	static __align__ ulong cmderase[2] = { 0x00800080, 0x00800080 };
	69	static __align__ ulong cmdersusp[2] = { 0x00b000b0, 0x00b000b0 };
	70	static __align__ ulong cmdsecter[2] = { 0x00300030, 0x00300030 };
	71	static __align__ ulong cmdprog[2] = { 0x00a000a0, 0x00a000a0 };
	72	static __align__ ulong cmdres[2] = { 0x00f000f0, 0x00f000f0 };
	73
	74	/*-----------------------------------------------------------------------
	75	*/
	76
	77	unsigned long flash_init (void)
	78	{
	79	int i, j;
	80	ulong size = 0;
	81
6d0f6bcf JCPV	82	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
6d0f6bcf JCPV	83	vu_long addr = (vu_long ) (CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE);
d1cbe85b WD	84
	85	write_via_fpu (&addr[0xaaa], precmd0);
	86	write_via_fpu (&addr[0x554], precmd1);
	87	write_via_fpu (&addr[0xaaa], cmdid);
	88
	89	DEBUGF ("Flash bank # %d:\n"
	90	"\tManuf. ID @ 0x%08lX: 0x%08lX\n"
	91	"\tDevice ID @ 0x%08lX: 0x%08lX\n",
	92	i,
	93	(ulong) (&addr[0]), addr[0],
	94	(ulong) (&addr[2]), addr[2]);
	95
	96	if ((addr[0] == addr[1]) && (addr[0] == AMD_MANUFACT) &&
	97	(addr[2] == addr[3]) && (addr[2] == AMD_ID_LV160T)) {
	98	flash_info[i].flash_id = (FLASH_MAN_AMD & FLASH_VENDMASK) \|
	99	(FLASH_AM160T & FLASH_TYPEMASK);
	100	} else {
	101	flash_info[i].flash_id = FLASH_UNKNOWN;
	102	write_via_fpu (addr, cmdres);
	103	goto Done;
	104	}
	105
	106	DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);
	107
	108	write_via_fpu (addr, cmdres);
	109
	110	flash_info[i].size = FLASH_BANK_SIZE;
6d0f6bcf JCPV	111	flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
6d0f6bcf JCPV	112	memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
d1cbe85b	113	for (j = 0; j < 32; j++) {
6d0f6bcf	114	flash_info[i].start[j] = CONFIG_SYS_FLASH_BASE +
d1cbe85b WD	115	i * FLASH_BANK_SIZE + j * MAIN_SECT_SIZE;
	116	}
	117	flash_info[i].start[32] =
	118	flash_info[i].start[31] + PARAM_SECT1_SIZE;
	119	flash_info[i].start[33] =
	120	flash_info[i].start[32] + PARAM_SECT23_SIZE;
	121	flash_info[i].start[34] =
	122	flash_info[i].start[33] + PARAM_SECT23_SIZE;
	123	size += flash_info[i].size;
	124	}
	125
	126	/* Protect monitor and environment sectors
	127	*/
6d0f6bcf JCPV	128	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
6d0f6bcf JCPV	129	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
d1cbe85b	130	flash_protect ( FLAG_PROTECT_SET,
6d0f6bcf JCPV	131	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	132	CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
d1cbe85b WD	133	&flash_info[1]);
	134	#else
	135	flash_protect ( FLAG_PROTECT_SET,
6d0f6bcf JCPV	136	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	137	CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
d1cbe85b WD	138	&flash_info[0]);
	139	#endif
	140	#endif
	141
0e8d1586	142	#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
6d0f6bcf	143	#if CONFIG_ENV_ADDR >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
d1cbe85b	144	flash_protect ( FLAG_PROTECT_SET,
0e8d1586 JCPV	145	CONFIG_ENV_ADDR,
0e8d1586 JCPV	146	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[1]);
d1cbe85b WD	147	#else
d1cbe85b WD	148	flash_protect ( FLAG_PROTECT_SET,
0e8d1586 JCPV	149	CONFIG_ENV_ADDR,
0e8d1586 JCPV	150	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
d1cbe85b WD	151	#endif
	152	#endif
	153
	154	Done:
	155	return size;
	156	}
	157
	158	/*-----------------------------------------------------------------------
	159	*/
	160	void flash_print_info (flash_info_t * info)
	161	{
	162	int i;
	163
	164	switch ((i = info->flash_id & FLASH_VENDMASK)) {
	165	case (FLASH_MAN_AMD & FLASH_VENDMASK):
	166	printf ("Intel: ");
	167	break;
	168	default:
	169	printf ("Unknown Vendor 0x%04x ", i);
	170	break;
	171	}
	172
	173	switch ((i = info->flash_id & FLASH_TYPEMASK)) {
	174	case (FLASH_AM160T & FLASH_TYPEMASK):
	175	printf ("AM29LV160BT (16Mbit)\n");
	176	break;
	177	default:
	178	printf ("Unknown Chip Type 0x%04x\n", i);
	179	goto Done;
	180	break;
	181	}
	182
	183	printf (" Size: %ld MB in %d Sectors\n",
	184	info->size >> 20, info->sector_count);
	185
	186	printf (" Sector Start Addresses:");
	187	for (i = 0; i < info->sector_count; i++) {
	188	if ((i % 5) == 0) {
	189	printf ("\n ");
	190	}
	191	printf (" %08lX%s", info->start[i],
	192	info->protect[i] ? " (RO)" : " ");
	193	}
	194	printf ("\n");
	195
	196	Done:
	197	return;
	198	}
	199
	200	/*-----------------------------------------------------------------------
	201	*/
	202
	203	int flash_erase (flash_info_t * info, int s_first, int s_last)
	204	{
	205	int flag, prot, sect;
	206	ulong start, now, last;
	207
	208	DEBUGF ("Erase flash bank %d sect %d ... %d\n",
	209	info - &flash_info[0], s_first, s_last);
	210
	211	if ((s_first < 0) \|\| (s_first > s_last)) {
	212	if (info->flash_id == FLASH_UNKNOWN) {
	213	printf ("- missing\n");
	214	} else {
215	printf ("- no sectors to erase\n");
216	}
217	return 1;
218	}
219
220	if ((info->flash_id & FLASH_VENDMASK) !=
221	(FLASH_MAN_AMD & FLASH_VENDMASK)) {
222	printf ("Can erase only AMD flash types - aborted\n");
223	return 1;
224	}
225
226	prot = 0;
227	for (sect = s_first; sect <= s_last; ++sect) {
228	if (info->protect[sect]) {
229	prot++;
230	}
231	}
232
233	if (prot) {
234	printf ("- Warning: %d protected sectors will not be erased!\n",
235	prot);
236	} else {
237	printf ("\n");
238	}
239
240	start = get_timer (0);
241	last = start;
242	/* Start erase on unprotected sectors */
243	for (sect = s_first; sect <= s_last; sect++) {
244	if (info->protect[sect] == 0) { /* not protected */
245	vu_long addr = (vu_long ) (info->start[sect]);
246
247	DEBUGF ("Erase sect %d @ 0x%08lX\n", sect, (ulong) addr);
248
249	/* Disable interrupts which might cause a timeout
250	* here.
251	*/
252	flag = disable_interrupts ();
253
254	write_via_fpu (&addr[0xaaa], precmd0);
255	write_via_fpu (&addr[0x554], precmd1);
256	write_via_fpu (&addr[0xaaa], cmderase);
257	write_via_fpu (&addr[0xaaa], precmd0);
258	write_via_fpu (&addr[0x554], precmd1);
259	write_via_fpu (&addr[0xaaa], cmdsecter);
260
261	/* re-enable interrupts if necessary */
262	if (flag)
263	enable_interrupts ();
264
265	/* wait at least 80us - let's wait 1 ms */
266	udelay (1000);
267
268	while (((addr[0] & 0x00800080) != 0x00800080) \|\|
269	((addr[1] & 0x00800080) != 0x00800080)) {
6d0f6bcf	270	if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
d1cbe85b WD	271	printf ("Timeout\n");
	272	write_via_fpu (addr, cmdersusp);
	273	write_via_fpu (addr, cmdres);
	274	return 1;
	275	}
	276
	277	/* show that we're waiting */
	278	if ((now - last) > 1000) { /* every second */
	279	putc ('.');
	280	last = now;
	281	}
	282	}
	283
	284	write_via_fpu (addr, cmdres);
	285	}
	286	}
	287	printf (" done\n");
	288	return 0;
	289	}
	290
	291	/*-----------------------------------------------------------------------
	292	* Copy memory to flash, returns:
	293	* 0 - OK
	294	* 1 - write timeout
	295	* 2 - Flash not erased
	296	* 4 - Flash not identified
	297	*/
	298
	299	#define FLASH_WIDTH 8 /* flash bus width in bytes */
	300
	301	int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	302	{
	303	ulong wp, cp, msr;
	304	int l, rc, i;
	305	ulong data[2];
	306	ulong *datah = &data[0];
	307	ulong *datal = &data[1];
	308
	309	DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n",
	310	addr, (ulong) src, cnt);
	311
	312	if (info->flash_id == FLASH_UNKNOWN) {
	313	return 4;
	314	}
	315
	316	msr = get_msr ();
	317	set_msr (msr \| MSR_FP);
	318
	319	wp = (addr & ~(FLASH_WIDTH - 1)); /* get lower aligned address */
	320
	321	/*
	322	* handle unaligned start bytes
	323	*/
	324	if ((l = addr - wp) != 0) {
	325	datah = datal = 0;
	326
	327	for (i = 0, cp = wp; i < l; i++, cp++) {
	328	if (i >= 4) {
	329	datah = (datah << 8) \| ((*datal & 0xFF000000) >> 24);
	330	}
	331
	332	datal = (datal << 8) \| ((uchar ) cp);
	333	}
	334	for (; i < FLASH_WIDTH && cnt > 0; ++i) {
335	char tmp;
336
337	tmp = *src;
338
339	src++;
340
341	if (i >= 4) {
342	datah = (datah << 8) \| ((*datal & 0xFF000000) >> 24);
343	}
344
345	datal = (datal << 8) \| tmp;
346
347	--cnt;
348	++cp;
349	}
350
351	for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) {
352	if (i >= 4) {
353	datah = (datah << 8) \| ((*datal & 0xFF000000) >> 24);
354	}
355
356	datal = (datah << 8) \| ((uchar ) cp);
357	}
358
359	if ((rc = write_data (info, wp, data)) != 0) {
360	set_msr (msr);
361	return (rc);
362	}
363
364	wp += FLASH_WIDTH;
365	}
366
367	/*
368	* handle FLASH_WIDTH aligned part
369	*/
370	while (cnt >= FLASH_WIDTH) {
371	datah = (ulong *) src;
372	datal = (ulong *) (src + 4);
373	if ((rc = write_data (info, wp, data)) != 0) {
374	set_msr (msr);
375	return (rc);
376	}
377	wp += FLASH_WIDTH;
378	cnt -= FLASH_WIDTH;
379	src += FLASH_WIDTH;
380	}
381
382	if (cnt == 0) {
383	set_msr (msr);
384	return (0);
385	}
386
387	/*
388	* handle unaligned tail bytes
389	*/
390	datah = datal = 0;
391	for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
392	char tmp;
393
394	tmp = *src;
395
396	src++;
397
398	if (i >= 4) {
399	datah = (datah << 8) \| ((*datal & 0xFF000000) >> 24);
400	}
401
402	datal = (datal << 8) \| tmp;
403
404	--cnt;
405	}
406
407	for (; i < FLASH_WIDTH; ++i, ++cp) {
408	if (i >= 4) {
409	datah = (datah << 8) \| ((*datal & 0xFF000000) >> 24);
410	}
411
412	datal = (datal << 8) \| ((uchar ) cp);
413	}
414
415	rc = write_data (info, wp, data);
416	set_msr (msr);
417
418	return (rc);
419	}
420
421	/*-----------------------------------------------------------------------
422	* Write a word to Flash, returns:
423	* 0 - OK
424	* 1 - write timeout
425	* 2 - Flash not erased
426	*/
427	static int write_data (flash_info_t * info, ulong dest, ulong * data)
428	{
429	vu_long chip = (vu_long ) (info->start[0]);
430	vu_long addr = (vu_long ) dest;
431	ulong start;
432	int flag;
433
434	/* Check if Flash is (sufficiently) erased */
435	if (((addr[0] & data[0]) != data[0]) \|\|
436	((addr[1] & data[1]) != data[1])) {
437	return (2);
438	}
439	/* Disable interrupts which might cause a timeout here */
440	flag = disable_interrupts ();
441
442	write_via_fpu (&chip[0xaaa], precmd0);
443	write_via_fpu (&chip[0x554], precmd1);
444	write_via_fpu (&chip[0xaaa], cmdprog);
445	write_via_fpu (addr, data);
446
447	/* re-enable interrupts if necessary */
448	if (flag)
449	enable_interrupts ();
450
451	start = get_timer (0);
452
453	while (((addr[0] & 0x00800080) != (data[0] & 0x00800080)) \|\|
454	((addr[1] & 0x00800080) != (data[1] & 0x00800080))) {
6d0f6bcf	455	if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
d1cbe85b WD	456	write_via_fpu (chip, cmdres);
	457	return (1);
	458	}
	459	}
	460
	461	write_via_fpu (chip, cmdres);
	462
	463	return (0);
	464	}
	465
	466	/*-----------------------------------------------------------------------
	467	*/
	468	static void write_via_fpu (vu_long * addr, ulong * data)
	469	{
	470	__asm__ __volatile__ ("lfd 1, 0(%0)"::"r" (data));
	471	__asm__ __volatile__ ("stfd 1, 0(%0)"::"r" (addr));
	472	}
	473
	474	/*-----------------------------------------------------------------------
	475	*/
	476	static __inline__ unsigned long get_msr (void)
	477	{
	478	unsigned long msr;
	479
	480	__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);
	481
	482	return msr;
	483	}
	484
	485	static __inline__ void set_msr (unsigned long msr)
	486	{
	487	__asm__ __volatile__ ("mtmsr %0"::"r" (msr));
	488	}