board/pm826/flash.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2001, 2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * Flash Routines for Intel devices
  *
  *--------------------------------------------------------------------
  * 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];

 /*-----------------------------------------------------------------------
  */
 ulong flash_get_size (volatile unsigned long *baseaddr,
 					  flash_info_t * info)
 {
 	short i;
 	unsigned long flashtest_h, flashtest_l;

 	info->sector_count = info->size = 0;
 	info->flash_id = FLASH_UNKNOWN;

 	/* Write query command sequence and test FLASH answer
 	 */
 	baseaddr[0] = 0x00980098;
 	baseaddr[1] = 0x00980098;

 	flashtest_h = baseaddr[0];	/* manufacturer ID	*/
 	flashtest_l = baseaddr[1];

 	if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)
 		return (0);		/* no or unknown flash	*/

 	flashtest_h = baseaddr[2];	/* device ID	        */
 	flashtest_l = baseaddr[3];

 	if (flashtest_h != flashtest_l)
 		return (0);

 	switch (flashtest_h) {
 	case INTEL_ID_28F160C3B:
 		info->flash_id = FLASH_28F160C3B;
 		info->sector_count = 39;
 		info->size = 0x00800000;	/* 4 * 2 MB = 8 MB	*/
 		break;
 	case INTEL_ID_28F160F3B:
 		info->flash_id = FLASH_28F160F3B;
 		info->sector_count = 39;
 		info->size = 0x00800000;	/* 4 * 2 MB = 8 MB      */
 		break;
 	default:
 		return (0);			/* no or unknown flash	*/
 	}

 	info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */

 	if (info->flash_id & FLASH_BTYPE) {
 		volatile unsigned long *tmp = baseaddr;

 		/* set up sector start adress table (bottom sector type)
 		 * AND unlock the sectors (if our chip is 160C3)
 		 */
 		for (i = 0; i < info->sector_count; i++) {
 			if ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) {
 				tmp[0] = 0x00600060;
 				tmp[1] = 0x00600060;
 				tmp[0] = 0x00D000D0;
 				tmp[1] = 0x00D000D0;
 			}
 			info->start[i] = (uint) tmp;
 			tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith       */
 		}
 	}

 	memset (info->protect, 0, info->sector_count);

 	baseaddr[0] = 0x00FF00FF;
 	baseaddr[1] = 0x00FF00FF;

 	return (info->size);
 }

 /*-----------------------------------------------------------------------
  */
 unsigned long flash_init (void)
 {
 	unsigned long size_b0 = 0;
 	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 (only one bank) */

 	size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]);
 	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
 		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 				size_b0, size_b0 >> 20);
 	}

 	/* protect monitor and environment sectors
 	 */

 #ifndef CONFIG_BOOT_ROM
 	/* If U-Boot is  booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE
 	 * but we shouldn't protect it.
 	 */

 # if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
 	flash_protect (FLAG_PROTECT_SET,
 		       CFG_MONITOR_BASE,
 		       CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]
 	);
 # endif
 #endif	/* CONFIG_BOOT_ROM */

 #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
 # ifndef  CFG_ENV_SIZE
 #  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
 # endif
 	flash_protect (FLAG_PROTECT_SET,
 		       CFG_ENV_ADDR,
 		       CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
 #endif

 	return (size_b0);
 }

 /*-----------------------------------------------------------------------
  */
 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 >> 16) & 0xff) {
 	case 0x89:
 		printf ("INTEL ");
 		break;
 	default:
 		printf ("Unknown Vendor ");
 		break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case FLASH_28F160C3B:
 		printf ("28F160C3B (16 M, bottom sector)\n");
 		break;
 	case FLASH_28F160F3B:
 		printf ("28F160F3B (16 M, bottom 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");
 }

 /*-----------------------------------------------------------------------
  */
 int flash_erase (flash_info_t * info, int s_first, int s_last)
 {
 	int flag, prot, 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;
 	}

 	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 erase on unprotected sectors
 	 */
 	for (sect = s_first; sect <= s_last; sect++) {
 		volatile ulong *addr =
 				(volatile unsigned long *) info->start[sect];

 		start = get_timer (0);
 		last = start;
 		if (info->protect[sect] == 0) {
 			/* Disable interrupts which might cause a timeout here
 			 */
 			flag = disable_interrupts ();

 			/* Erase the block
 			 */
 			addr[0] = 0x00200020;
 			addr[1] = 0x00200020;
 			addr[0] = 0x00D000D0;
 			addr[1] = 0x00D000D0;

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

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

 			last = start;
 			while ((addr[0] & 0x00800080) != 0x00800080 ||
 				   (addr[1] & 0x00800080) != 0x00800080) {
 				if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
 					printf ("Timeout (erase suspended!)\n");
 					/* Suspend erase
 					 */
 					addr[0] = 0x00B000B0;
 					addr[1] = 0x00B000B0;
 					goto DONE;
 				}
 				/* show that we're waiting
 				 */
 				if ((now - last) > 1000) {	/* every second */
 					serial_putc ('.');
 					last = now;
 				}
 			}
 			if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
 				printf ("*** ERROR: erase failed!\n");
 				goto DONE;
 			}
 		}
 		/* Clear status register and reset to read mode
 		 */
 		addr[0] = 0x00500050;
 		addr[1] = 0x00500050;
 		addr[0] = 0x00FF00FF;
 		addr[1] = 0x00FF00FF;
 	}

 	printf (" done\n");

 DONE:
 	return 0;
 }

 static int write_word (flash_info_t *, volatile unsigned long *, ulong);

 /*-----------------------------------------------------------------------
  * 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 v;
 	int i, l, cc = cnt, res = 0;


 	for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
 		l = (addr & 3);
 		addr &= ~3;

 		for (i = 0; i < 4; i++) {
 			v = (v << 8) + (i < l || i - l >= cc ?
 				*((unsigned char *) addr + i) : *src++);
 		}

 		if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
 			break;
 	}

 	return (res);
 }

 /*-----------------------------------------------------------------------
  * Write a word to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 static int write_word (flash_info_t * info, volatile unsigned long *addr,
 					   ulong data)
 {
 	int flag, res = 0;
 	ulong start;

 	/* Check if Flash is (sufficiently) erased
 	 */
 	if ((*addr & data) != data)
 		return (2);

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

 	*addr = 0x00400040;
 	*addr = data;

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

 	start = get_timer (0);
 	while ((*addr & 0x00800080) != 0x00800080) {
 		if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
 			/* Suspend program
 			 */
 			*addr = 0x00B000B0;
 			res = 1;
 			goto OUT;
 		}
 	}

 	if (*addr & 0x00220022) {
 		printf ("*** ERROR: program failed!\n");
 		res = 1;
 	}

 OUT:
 	/* Clear status register and reset to read mode
 	 */
 	*addr = 0x00500050;
 	*addr = 0x00FF00FF;

 	return (res);
 }
	/*
	* (C) Copyright 2001, 2002
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* Flash Routines for Intel devices
	*
	*--------------------------------------------------------------------
	* 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];

	/*-----------------------------------------------------------------------
	*/
	ulong flash_get_size (volatile unsigned long *baseaddr,
	flash_info_t * info)
	{
	short i;
	unsigned long flashtest_h, flashtest_l;

	info->sector_count = info->size = 0;
	info->flash_id = FLASH_UNKNOWN;

	/* Write query command sequence and test FLASH answer
	*/
	baseaddr[0] = 0x00980098;
	baseaddr[1] = 0x00980098;

	flashtest_h = baseaddr[0]; /* manufacturer ID */
	flashtest_l = baseaddr[1];

	if (flashtest_h != INTEL_MANUFACT \|\| flashtest_l != INTEL_MANUFACT)
	return (0); /* no or unknown flash */

	flashtest_h = baseaddr[2]; /* device ID */
	flashtest_l = baseaddr[3];

	if (flashtest_h != flashtest_l)
	return (0);

	switch (flashtest_h) {
	case INTEL_ID_28F160C3B:
	info->flash_id = FLASH_28F160C3B;
	info->sector_count = 39;
	info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
	break;
	case INTEL_ID_28F160F3B:
	info->flash_id = FLASH_28F160F3B;
	info->sector_count = 39;
	info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
	break;
	default:
	return (0); /* no or unknown flash */
	}

	info->flash_id \|= INTEL_MANUFACT << 16; /* set manufacturer offset */

	if (info->flash_id & FLASH_BTYPE) {
	volatile unsigned long *tmp = baseaddr;

	/* set up sector start adress table (bottom sector type)
	* AND unlock the sectors (if our chip is 160C3)
	*/
	for (i = 0; i < info->sector_count; i++) {
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) {
	tmp[0] = 0x00600060;
	tmp[1] = 0x00600060;
	tmp[0] = 0x00D000D0;
	tmp[1] = 0x00D000D0;
	}
	info->start[i] = (uint) tmp;
	tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */
	}
	}

	memset (info->protect, 0, info->sector_count);

	baseaddr[0] = 0x00FF00FF;
	baseaddr[1] = 0x00FF00FF;

	return (info->size);
	}

	/*-----------------------------------------------------------------------
	*/
	unsigned long flash_init (void)
	{
	unsigned long size_b0 = 0;
	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 (only one bank) */

	size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]);
	if (flash_info[0].flash_id == FLASH_UNKNOWN \|\| size_b0 == 0) {
	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	size_b0, size_b0 >> 20);
	}

	/* protect monitor and environment sectors
	*/

	#ifndef CONFIG_BOOT_ROM
	/* If U-Boot is booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE
	* but we shouldn't protect it.
	*/

	# if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
	flash_protect (FLAG_PROTECT_SET,
	CFG_MONITOR_BASE,
	CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]
	);
	# endif
	#endif /* CONFIG_BOOT_ROM */

	#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
	# ifndef CFG_ENV_SIZE
	# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
	# endif
	flash_protect (FLAG_PROTECT_SET,
	CFG_ENV_ADDR,
	CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
	#endif

	return (size_b0);
	}

	/*-----------------------------------------------------------------------
	*/
	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 >> 16) & 0xff) {
	case 0x89:
	printf ("INTEL ");
	break;
	default:
	printf ("Unknown Vendor ");
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_28F160C3B:
	printf ("28F160C3B (16 M, bottom sector)\n");
	break;
	case FLASH_28F160F3B:
	printf ("28F160F3B (16 M, bottom 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");
	}

	/*-----------------------------------------------------------------------
	*/
	int flash_erase (flash_info_t * info, int s_first, int s_last)
	{
	int flag, prot, 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;
	}

	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 erase on unprotected sectors
	*/
	for (sect = s_first; sect <= s_last; sect++) {
	volatile ulong *addr =
	(volatile unsigned long *) info->start[sect];

	start = get_timer (0);
	last = start;
	if (info->protect[sect] == 0) {
	/* Disable interrupts which might cause a timeout here
	*/
	flag = disable_interrupts ();

	/* Erase the block
	*/
	addr[0] = 0x00200020;
	addr[1] = 0x00200020;
	addr[0] = 0x00D000D0;
	addr[1] = 0x00D000D0;

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

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

	last = start;
	while ((addr[0] & 0x00800080) != 0x00800080 \|\|
	(addr[1] & 0x00800080) != 0x00800080) {
	if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
	printf ("Timeout (erase suspended!)\n");
	/* Suspend erase
	*/
	addr[0] = 0x00B000B0;
	addr[1] = 0x00B000B0;
	goto DONE;
	}
	/* show that we're waiting
	*/
	if ((now - last) > 1000) { /* every second */
	serial_putc ('.');
	last = now;
	}
	}
	if (addr[0] & 0x00220022 \|\| addr[1] & 0x00220022) {
	printf ("*** ERROR: erase failed!\n");
	goto DONE;
	}
	}
	/* Clear status register and reset to read mode
	*/
	addr[0] = 0x00500050;
	addr[1] = 0x00500050;
	addr[0] = 0x00FF00FF;
	addr[1] = 0x00FF00FF;
	}

	printf (" done\n");

	DONE:
	return 0;
	}

	static int write_word (flash_info_t , volatile unsigned long , ulong);

	/*-----------------------------------------------------------------------
	* 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 v;
	int i, l, cc = cnt, res = 0;


	for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
	l = (addr & 3);
	addr &= ~3;

	for (i = 0; i < 4; i++) {
	v = (v << 8) + (i < l \|\| i - l >= cc ?
	((unsigned char ) addr + i) : *src++);
	}

	if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
	break;
	}

	return (res);
	}

	/*-----------------------------------------------------------------------
	* Write a word to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	static int write_word (flash_info_t * info, volatile unsigned long *addr,
	ulong data)
	{
	int flag, res = 0;
	ulong start;

	/* Check if Flash is (sufficiently) erased
	*/
	if ((*addr & data) != data)
	return (2);

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

	*addr = 0x00400040;
	*addr = data;

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

	start = get_timer (0);
	while ((*addr & 0x00800080) != 0x00800080) {
	if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
	/* Suspend program
	*/
	*addr = 0x00B000B0;
	res = 1;
	goto OUT;
	}
	}

	if (*addr & 0x00220022) {
	printf ("*** ERROR: program failed!\n");
	res = 1;
	}

	OUT:
	/* Clear status register and reset to read mode
	*/
	*addr = 0x00500050;
	*addr = 0x00FF00FF;

	return (res);
	}