board/ep7312/flash.c - uboot/prism - Git at Google

 /*
  * (C) Copyright 2002
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Marius Groeger <mgroeger@sysgo.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>

 #define FLASH_BANK_SIZE 0x1000000
 #define MAIN_SECT_SIZE  0x20000

 flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS];


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

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

 	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
 		ulong flashbase = 0;

 		flash_info[i].flash_id =
 				(INTEL_MANUFACT & FLASH_VENDMASK) |
 				(INTEL_ID_28F128J3 & FLASH_TYPEMASK);
 		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);
 		if (i == 0)
 			flashbase = PHYS_FLASH_1;
 		else
 			panic ("configured too many flash banks!\n");
 		for (j = 0; j < flash_info[i].sector_count; j++) {
 			flash_info[i].start[j] = flashbase + j * MAIN_SECT_SIZE;
 		}
 		size += flash_info[i].size;
 	}

 	/* Protect monitor and environment sectors
 	 */
 	flash_protect ( FLAG_PROTECT_SET,
 			CONFIG_SYS_FLASH_BASE,
 			CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
 			&flash_info[0]);

 	flash_protect ( FLAG_PROTECT_SET,
 			CONFIG_ENV_ADDR,
 			CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);

 	return size;
 }

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

 	switch (info->flash_id & FLASH_VENDMASK) {
 	case (INTEL_MANUFACT & FLASH_VENDMASK):
 		printf ("Intel: ");
 		break;
 	default:
 		printf ("Unknown Vendor ");
 		break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
 		printf ("28F128J3 (128Mbit)\n");
 		break;
 	default:
 		printf ("Unknown Chip Type\n");
 		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:	;
 }

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

 int flash_erase (flash_info_t * info, int s_first, int s_last)
 {
 	int flag, prot, sect;
 	int rc = ERR_OK;

 	if (info->flash_id == FLASH_UNKNOWN)
 		return ERR_UNKNOWN_FLASH_TYPE;

 	if ((s_first < 0) || (s_first > s_last)) {
 		return ERR_INVAL;
 	}

 	if ((info->flash_id & FLASH_VENDMASK) !=
 		(INTEL_MANUFACT & FLASH_VENDMASK)) {
 		return ERR_UNKNOWN_FLASH_VENDOR;
 	}

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

 	/*
 	 * Disable interrupts which might cause a timeout
 	 * here. Remember that our exception vectors are
 	 * at address 0 in the flash, and we don't want a
 	 * (ticker) exception to happen while the flash
 	 * chip is in programming mode.
 	 */
 	flag = disable_interrupts ();

 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {

 		printf ("Erasing sector %2d ... ", sect);

 		/* arm simple, non interrupt dependent timer */
 		reset_timer_masked ();

 		if (info->protect[sect] == 0) {	/* not protected */
 			vu_short *addr = (vu_short *) (info->start[sect]);

 			*addr = 0x20;		/* erase setup */
 			*addr = 0xD0;		/* erase confirm */

 			while ((*addr & 0x80) != 0x80) {
 				if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
 					*addr = 0xB0;	/* suspend erase */
 					*addr = 0xFF;	/* reset to read mode */
 					rc = ERR_TIMOUT;
 					goto outahere;
 				}
 			}

 			/* clear status register command */
 			*addr = 0x50;
 			/* reset to read mode */
 			*addr = 0xFF;
 		}
 		printf ("ok.\n");
 	}
 	if (ctrlc ())
 		printf ("User Interrupt!\n");

   outahere:

 	/* allow flash to settle - wait 10 ms */
 	udelay_masked (10000);

 	if (flag)
 		enable_interrupts ();

 	return rc;
 }

 /*-----------------------------------------------------------------------
  * Copy memory to flash
  */

 static int write_word (flash_info_t * info, ulong dest, ushort data)
 {
 	vu_short *addr = (vu_short *) dest, val;
 	int rc = ERR_OK;
 	int flag;

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

 	/*
 	 * Disable interrupts which might cause a timeout
 	 * here. Remember that our exception vectors are
 	 * at address 0 in the flash, and we don't want a
 	 * (ticker) exception to happen while the flash
 	 * chip is in programming mode.
 	 */
 	flag = disable_interrupts ();

 	/* clear status register command */
 	*addr = 0x50;

 	/* program set-up command */
 	*addr = 0x40;

 	/* latch address/data */
 	*addr = data;

 	/* arm simple, non interrupt dependent timer */
 	reset_timer_masked ();

 	/* wait while polling the status register */
 	while (((val = *addr) & 0x80) != 0x80) {
 		if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
 			rc = ERR_TIMOUT;
 			/* suspend program command */
 			*addr = 0xB0;
 			goto outahere;
 		}
 	}

 	if (val & 0x1A) {			/* check for error */
 		printf ("\nFlash write error %02x at address %08lx\n",
 				(int) val, (unsigned long) dest);
 		if (val & (1 << 3)) {
 			printf ("Voltage range error.\n");
 			rc = ERR_PROG_ERROR;
 			goto outahere;
 		}
 		if (val & (1 << 1)) {
 			printf ("Device protect error.\n");
 			rc = ERR_PROTECTED;
 			goto outahere;
 		}
 		if (val & (1 << 4)) {
 			printf ("Programming error.\n");
 			rc = ERR_PROG_ERROR;
 			goto outahere;
 		}
 		rc = ERR_PROG_ERROR;
 		goto outahere;
 	}

   outahere:
 	/* read array command */
 	*addr = 0xFF;

 	if (flag)
 		enable_interrupts ();

 	return rc;
 }

 /*-----------------------------------------------------------------------
  * Copy memory to flash.
  */

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

 	wp = (addr & ~1);			/* 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 << 8);
 		}
 		for (; i < 2 && cnt > 0; ++i) {
 			data = (data >> 8) | (*src++ << 8);
 			--cnt;
 			++cp;
 		}
 		for (; cnt == 0 && i < 2; ++i, ++cp) {
 			data = (data >> 8) | (*(uchar *) cp << 8);
 		}

 		if ((rc = write_word (info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp += 2;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cnt >= 2) {
 		data = *((vu_short *) src);
 		if ((rc = write_word (info, wp, data)) != 0) {
 			return (rc);
 		}
 		src += 2;
 		wp += 2;
 		cnt -= 2;
 	}

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

 	/*
 	 * handle unaligned tail bytes
 	 */
 	data = 0;
 	for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
 		data = (data >> 8) | (*src++ << 8);
 		--cnt;
 	}
 	for (; i < 2; ++i, ++cp) {
 		data = (data >> 8) | (*(uchar *) cp << 8);
 	}

 	return write_word (info, wp, data);
 }
	/*
	* (C) Copyright 2002
	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	* Marius Groeger <mgroeger@sysgo.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>

	#define FLASH_BANK_SIZE 0x1000000
	#define MAIN_SECT_SIZE 0x20000

	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];


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

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

	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
	ulong flashbase = 0;

	flash_info[i].flash_id =
	(INTEL_MANUFACT & FLASH_VENDMASK) \|
	(INTEL_ID_28F128J3 & FLASH_TYPEMASK);
	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);
	if (i == 0)
	flashbase = PHYS_FLASH_1;
	else
	panic ("configured too many flash banks!\n");
	for (j = 0; j < flash_info[i].sector_count; j++) {
	flash_info[i].start[j] = flashbase + j * MAIN_SECT_SIZE;
	}
	size += flash_info[i].size;
	}

	/* Protect monitor and environment sectors
	*/
	flash_protect ( FLAG_PROTECT_SET,
	CONFIG_SYS_FLASH_BASE,
	CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
	&flash_info[0]);

	flash_protect ( FLAG_PROTECT_SET,
	CONFIG_ENV_ADDR,
	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);

	return size;
	}

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

	switch (info->flash_id & FLASH_VENDMASK) {
	case (INTEL_MANUFACT & FLASH_VENDMASK):
	printf ("Intel: ");
	break;
	default:
	printf ("Unknown Vendor ");
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
	printf ("28F128J3 (128Mbit)\n");
	break;
	default:
	printf ("Unknown Chip Type\n");
	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: ;
	}

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

	int flash_erase (flash_info_t * info, int s_first, int s_last)
	{
	int flag, prot, sect;
	int rc = ERR_OK;

	if (info->flash_id == FLASH_UNKNOWN)
	return ERR_UNKNOWN_FLASH_TYPE;

	if ((s_first < 0) \|\| (s_first > s_last)) {
	return ERR_INVAL;
	}

	if ((info->flash_id & FLASH_VENDMASK) !=
	(INTEL_MANUFACT & FLASH_VENDMASK)) {
	return ERR_UNKNOWN_FLASH_VENDOR;
	}

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

	/*
	* Disable interrupts which might cause a timeout
	* here. Remember that our exception vectors are
	* at address 0 in the flash, and we don't want a
	* (ticker) exception to happen while the flash
	* chip is in programming mode.
	*/
	flag = disable_interrupts ();

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {

	printf ("Erasing sector %2d ... ", sect);

	/* arm simple, non interrupt dependent timer */
	reset_timer_masked ();

	if (info->protect[sect] == 0) { /* not protected */
	vu_short addr = (vu_short ) (info->start[sect]);

	addr = 0x20; / erase setup */
	addr = 0xD0; / erase confirm */

	while ((*addr & 0x80) != 0x80) {
	if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
	addr = 0xB0; / suspend erase */
	addr = 0xFF; / reset to read mode */
	rc = ERR_TIMOUT;
	goto outahere;
	}
	}

	/* clear status register command */
	*addr = 0x50;
	/* reset to read mode */
	*addr = 0xFF;
	}
	printf ("ok.\n");
	}
	if (ctrlc ())
	printf ("User Interrupt!\n");

	outahere:

	/* allow flash to settle - wait 10 ms */
	udelay_masked (10000);

	if (flag)
	enable_interrupts ();

	return rc;
	}

	/*-----------------------------------------------------------------------
	* Copy memory to flash
	*/

	static int write_word (flash_info_t * info, ulong dest, ushort data)
	{
	vu_short addr = (vu_short ) dest, val;
	int rc = ERR_OK;
	int flag;

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

	/*
	* Disable interrupts which might cause a timeout
	* here. Remember that our exception vectors are
	* at address 0 in the flash, and we don't want a
	* (ticker) exception to happen while the flash
	* chip is in programming mode.
	*/
	flag = disable_interrupts ();

	/* clear status register command */
	*addr = 0x50;

	/* program set-up command */
	*addr = 0x40;

	/* latch address/data */
	*addr = data;

	/* arm simple, non interrupt dependent timer */
	reset_timer_masked ();

	/* wait while polling the status register */
	while (((val = *addr) & 0x80) != 0x80) {
	if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
	rc = ERR_TIMOUT;
	/* suspend program command */
	*addr = 0xB0;
	goto outahere;
	}
	}

	if (val & 0x1A) { /* check for error */
	printf ("\nFlash write error %02x at address %08lx\n",
	(int) val, (unsigned long) dest);
	if (val & (1 << 3)) {
	printf ("Voltage range error.\n");
	rc = ERR_PROG_ERROR;
	goto outahere;
	}
	if (val & (1 << 1)) {
	printf ("Device protect error.\n");
	rc = ERR_PROTECTED;
	goto outahere;
	}
	if (val & (1 << 4)) {
	printf ("Programming error.\n");
	rc = ERR_PROG_ERROR;
	goto outahere;
	}
	rc = ERR_PROG_ERROR;
	goto outahere;
	}

	outahere:
	/* read array command */
	*addr = 0xFF;

	if (flag)
	enable_interrupts ();

	return rc;
	}

	/*-----------------------------------------------------------------------
	* Copy memory to flash.
	*/

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

	wp = (addr & ~1); /* 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 << 8);
	}
	for (; i < 2 && cnt > 0; ++i) {
	data = (data >> 8) \| (*src++ << 8);
	--cnt;
	++cp;
	}
	for (; cnt == 0 && i < 2; ++i, ++cp) {
	data = (data >> 8) \| ((uchar ) cp << 8);
	}

	if ((rc = write_word (info, wp, data)) != 0) {
	return (rc);
	}
	wp += 2;
	}

	/*
	* handle word aligned part
	*/
	while (cnt >= 2) {
	data = ((vu_short ) src);
	if ((rc = write_word (info, wp, data)) != 0) {
	return (rc);
	}
	src += 2;
	wp += 2;
	cnt -= 2;
	}

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

	/*
	* handle unaligned tail bytes
	*/
	data = 0;
	for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
	data = (data >> 8) \| (*src++ << 8);
	--cnt;
	}
	for (; i < 2; ++i, ++cp) {
	data = (data >> 8) \| ((uchar ) cp << 8);
	}

	return write_word (info, wp, data);
	}