board/csb226/flash.c - github/trini/u-boot - Gitiles

 /*
  * (C) Copyright 2002
  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
  *
  * (C) Copyright 2002
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Marius Groeger <mgroeger@sysgo.de>
  *
  * (C) Copyright 2002
  * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
  *
  * (C) Copyright 2003 (2 x 16 bit Flash bank patches)
  * Rolf Peukert, IMMS gGmbH, <rolf.peukert@imms.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 <asm/arch/pxa-regs.h>

 #define FLASH_BANK_SIZE 0x02000000
 #define MAIN_SECT_SIZE	0x40000		/* 2x16 = 256k per sector */

 flash_info_t	flash_info[CFG_MAX_FLASH_BANKS];


 /**
  * flash_init: - initialize data structures for flash chips
  *
  * @return: size of the flash
  */

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

 	for (i = 0; i < CFG_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 = CFG_MAX_FLASH_SECT;
 		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);

 		switch (i) {
 		case 0:
 			flashbase = PHYS_FLASH_1;
 			break;
 		default:
 			panic("configured too many flash banks!\n");
 			break;
 		}
 		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,
 			CFG_FLASH_BASE,
 			CFG_FLASH_BASE + monitor_flash_len - 1,
 			&flash_info[0]);

 	flash_protect(FLAG_PROTECT_SET,
 			CFG_ENV_ADDR,
 			CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 			&flash_info[0]);

 	return size;
 }


 /**
  * flash_print_info: - print information about the flash situation
  */

 void flash_print_info  (flash_info_t *info)
 {
 	int i, j;

 	for (j=0; j<CFG_MAX_FLASH_BANKS; j++) {

 		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");
 			return;
 		}

 		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");
 		info++;
 	}
 }


 /**
  * flash_erase: - erase flash sectors
  */

 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 */
 			u32 * volatile addr = (u32 * volatile)(info->start[sect]);

 			/* erase sector:				    */
 			/* The strata flashs are aligned side by side on    */
 			/* the data bus, so we have to write the commands   */
 			/* to both chips here:				    */

 			*addr = 0x00200020;	/* erase setup */
 			*addr = 0x00D000D0;	/* erase confirm */

 			while ((*addr & 0x00800080) != 0x00800080) {
 				if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
 					*addr = 0x00B000B0; /* suspend erase*/
 					*addr = 0x00FF00FF; /* read mode    */
 					rc = ERR_TIMOUT;
 					goto outahere;
 				}
 			}
 			*addr = 0x00500050; /* clear status register cmd.   */
 			*addr = 0x00FF00FF; /* reset to read mode	    */
 		}
 		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;
 }

 /**
  * write_long: - copy memory to flash, assume a bank of 2 devices with 16bit each
  */

 static int write_long (flash_info_t *info, ulong dest, ulong data)
 {
 	u32 * volatile addr = (u32 * volatile)dest, val;
 	int rc = ERR_OK;
 	int flag;

 	/* read array command - just for the case... */
 	*addr = 0x00FF00FF;

 	/* 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 = 0x00500050;

 	/* program set-up command */
 	*addr = 0x00400040;

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

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

 	/* wait while polling the status register */
 	while(((val = *addr) & 0x00800080) != 0x00800080) {
 		if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
 			rc = ERR_TIMOUT;
 			/* suspend program command */
 			*addr = 0x00B000B0;
 			goto outahere;
 		}
 	}

 	/* check for errors */
 	if(val & 0x001A001A) {
 		printf("\nFlash write error %02x at address %08lx\n",
 			(int)val, (unsigned long)dest);
 		if(val & 0x00080008) {
 			printf("Voltage range error.\n");
 			rc = ERR_PROG_ERROR;
 			goto outahere;
 		}
 		if(val & 0x00020002) {
 			printf("Device protect error.\n");
 			rc = ERR_PROTECTED;
 			goto outahere;
 		}
 		if(val & 0x00100010) {
 			printf("Programming error.\n");
 			rc = ERR_PROG_ERROR;
 			goto outahere;
 		}
 		rc = ERR_PROG_ERROR;
 		goto outahere;
 	}

 outahere:
 	/* read array command */
 	*addr = 0x00FF00FF;
 	if (flag) enable_interrupts();

 	return rc;
 }


 /**
  * write_buf: - Copy memory to flash.
  *
  * @param info:
  * @param src:	source of copy transaction
  * @param addr: where to copy to
  * @param cnt:	number of bytes to copy
  *
  * @return	error code
  */

 /* "long" version, uses 32bit words */
 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 {
 	ulong cp, wp;
 	ulong data;
 	int l;
 	int i, 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 << 24);
 		}
 		for (; i<4 && cnt>0; ++i) {
 			data = (data >> 8) | (*src++ << 24);
 			--cnt;
 			++cp;
 		}
 		for (; cnt==0 && i<4; ++i, ++cp) {
 			data = (data >> 8) | (*(uchar *)cp << 24);
 		}

 		if ((rc = write_long(info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp += 4;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cnt >= 4) {
 		data = *((ulong*)src);
 		if ((rc = write_long(info, wp, data)) != 0) {
 			return (rc);
 		}
 		src += 4;
 		wp  += 4;
 		cnt -= 4;
 	}

 	if (cnt == 0) return ERR_OK;

 	/*
 	 * handle unaligned tail bytes
 	 */
 	data = 0;
 	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
 		data = (data >> 8) | (*src++ << 24);
 		--cnt;
 	}
 	for (; i<4; ++i, ++cp) {
 		data = (data >> 8) | (*(uchar *)cp << 24);
 	}

 	return write_long(info, wp, data);
 }
	/*
	* (C) Copyright 2002
	* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
	*
	* (C) Copyright 2002
	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	* Marius Groeger <mgroeger@sysgo.de>
	*
	* (C) Copyright 2002
	* Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
	*
	* (C) Copyright 2003 (2 x 16 bit Flash bank patches)
	* Rolf Peukert, IMMS gGmbH, <rolf.peukert@imms.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 <asm/arch/pxa-regs.h>

	#define FLASH_BANK_SIZE 0x02000000
	#define MAIN_SECT_SIZE 0x40000 /* 2x16 = 256k per sector */

	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];


	/**
	* flash_init: - initialize data structures for flash chips
	*
	* @return: size of the flash
	*/

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

	for (i = 0; i < CFG_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 = CFG_MAX_FLASH_SECT;
	memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);

	switch (i) {
	case 0:
	flashbase = PHYS_FLASH_1;
	break;
	default:
	panic("configured too many flash banks!\n");
	break;
	}
	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,
	CFG_FLASH_BASE,
	CFG_FLASH_BASE + monitor_flash_len - 1,
	&flash_info[0]);

	flash_protect(FLAG_PROTECT_SET,
	CFG_ENV_ADDR,
	CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
	&flash_info[0]);

	return size;
	}


	/**
	* flash_print_info: - print information about the flash situation
	*/

	void flash_print_info (flash_info_t *info)
	{
	int i, j;

	for (j=0; j<CFG_MAX_FLASH_BANKS; j++) {

	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");
	return;
	}

	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");
	info++;
	}
	}


	/**
	* flash_erase: - erase flash sectors
	*/

	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 */
	u32 * volatile addr = (u32 * volatile)(info->start[sect]);

	/* erase sector: */
	/* The strata flashs are aligned side by side on */
	/* the data bus, so we have to write the commands */
	/* to both chips here: */

	addr = 0x00200020; / erase setup */
	addr = 0x00D000D0; / erase confirm */

	while ((*addr & 0x00800080) != 0x00800080) {
	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
	addr = 0x00B000B0; / suspend erase*/
	addr = 0x00FF00FF; / read mode */
	rc = ERR_TIMOUT;
	goto outahere;
	}
	}
	addr = 0x00500050; / clear status register cmd. */
	addr = 0x00FF00FF; / reset to read mode */
	}
	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;
	}

	/**
	* write_long: - copy memory to flash, assume a bank of 2 devices with 16bit each
	*/

	static int write_long (flash_info_t *info, ulong dest, ulong data)
	{
	u32 * volatile addr = (u32 * volatile)dest, val;
	int rc = ERR_OK;
	int flag;

	/* read array command - just for the case... */
	*addr = 0x00FF00FF;

	/* 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 = 0x00500050;

	/* program set-up command */
	*addr = 0x00400040;

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

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

	/* wait while polling the status register */
	while(((val = *addr) & 0x00800080) != 0x00800080) {
	if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
	rc = ERR_TIMOUT;
	/* suspend program command */
	*addr = 0x00B000B0;
	goto outahere;
	}
	}

	/* check for errors */
	if(val & 0x001A001A) {
	printf("\nFlash write error %02x at address %08lx\n",
	(int)val, (unsigned long)dest);
	if(val & 0x00080008) {
	printf("Voltage range error.\n");
	rc = ERR_PROG_ERROR;
	goto outahere;
	}
	if(val & 0x00020002) {
	printf("Device protect error.\n");
	rc = ERR_PROTECTED;
	goto outahere;
	}
	if(val & 0x00100010) {
	printf("Programming error.\n");
	rc = ERR_PROG_ERROR;
	goto outahere;
	}
	rc = ERR_PROG_ERROR;
	goto outahere;
	}

	outahere:
	/* read array command */
	*addr = 0x00FF00FF;
	if (flag) enable_interrupts();

	return rc;
	}


	/**
	* write_buf: - Copy memory to flash.
	*
	* @param info:
	* @param src: source of copy transaction
	* @param addr: where to copy to
	* @param cnt: number of bytes to copy
	*
	* @return error code
	*/

	/* "long" version, uses 32bit words */
	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	{
	ulong cp, wp;
	ulong data;
	int l;
	int i, 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 << 24);
	}
	for (; i<4 && cnt>0; ++i) {
	data = (data >> 8) \| (*src++ << 24);
	--cnt;
	++cp;
	}
	for (; cnt==0 && i<4; ++i, ++cp) {
	data = (data >> 8) \| ((uchar )cp << 24);
	}

	if ((rc = write_long(info, wp, data)) != 0) {
	return (rc);
	}
	wp += 4;
	}

	/*
	* handle word aligned part
	*/
	while (cnt >= 4) {
	data = ((ulong)src);
	if ((rc = write_long(info, wp, data)) != 0) {
	return (rc);
	}
	src += 4;
	wp += 4;
	cnt -= 4;
	}

	if (cnt == 0) return ERR_OK;

	/*
	* handle unaligned tail bytes
	*/
	data = 0;
	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
	data = (data >> 8) \| (*src++ << 24);
	--cnt;
	}
	for (; i<4; ++i, ++cp) {
	data = (data >> 8) \| ((uchar )cp << 24);
	}

	return write_long(info, wp, data);
	}