board/netstar/flash.c - uboot/windcharger - Git at Google

 /*
  * (C) Copyright 2002
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Alex Zuepke <azu@sysgo.de>
  *
  * (C) Copyright 2005
  * 2N Telekomunikace, a.s. <www.2n.cz>
  * Ladislav Michl <michl@2n.cz>
  *
  * 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>

 /*#if 0 */
 #if (PHYS_SDRAM_1_SIZE != SZ_32M)

 #include "crcek.h"

 #if (CFG_MAX_FLASH_BANKS > 1)
 #error There is always only _one_ flash chip
 #endif

 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

 #define CMD_READ_ARRAY		0x000000f0
 #define CMD_UNLOCK1		0x000000aa
 #define CMD_UNLOCK2		0x00000055
 #define CMD_ERASE_SETUP		0x00000080
 #define CMD_ERASE_CONFIRM	0x00000030
 #define CMD_PROGRAM		0x000000a0
 #define CMD_UNLOCK_BYPASS	0x00000020

 #define MEM_FLASH_ADDR1		(*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1)))
 #define MEM_FLASH_ADDR2		(*(volatile u16 *)(CFG_FLASH_BASE + (0x000002aa << 1)))

 #define BIT_ERASE_DONE		0x00000080
 #define BIT_RDY_MASK		0x00000080
 #define BIT_PROGRAM_ERROR	0x00000020
 #define BIT_TIMEOUT		0x80000000	/* our flag */

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

 ulong flash_init(void)
 {
 	int i;

 	flash_info[0].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) |
 				 (AMD_ID_LV800B & FLASH_TYPEMASK);
 	flash_info[0].size = PHYS_FLASH_1_SIZE;
 	flash_info[0].sector_count = CFG_MAX_FLASH_SECT;
 	memset(flash_info[0].protect, 0, CFG_MAX_FLASH_SECT);

 	for (i = 0; i < flash_info[0].sector_count; i++) {
 		switch (i) {
 		case 0: /* 16kB */
 			flash_info[0].start[0] = CFG_FLASH_BASE;
 			break;
 		case 1: /* 8kB */
 			flash_info[0].start[1] = CFG_FLASH_BASE + 0x4000;
 			break;
 		case 2: /* 8kB */
 			flash_info[0].start[2] = CFG_FLASH_BASE + 0x4000 +
 						 0x2000;
 			break;
 		case 3: /* 32 KB */
 			flash_info[0].start[3] = CFG_FLASH_BASE + 0x4000 +
 						 2 * 0x2000;
 			break;
 		case 4:
 			flash_info[0].start[4] = CFG_FLASH_BASE + 0x4000 +
 						 2 * 0x2000 + 0x8000;
 			break;
 		default: /* 64kB */
 			flash_info[0].start[i] = flash_info[0].start[i-1] +
 						 0x10000;
 			break;
 		}
 	}

 	/* U-Boot */
 	flash_protect(FLAG_PROTECT_SET,
 		      LOADER1_OFFSET,
 		      LOADER1_OFFSET + LOADER_SIZE - 1, flash_info);
 	/* Protect crcek, env and r_env as well */
 	flash_protect(FLAG_PROTECT_SET, 0, 0x8000 - 1, flash_info);

 	return flash_info[0].size;
 }

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

 	switch (info->flash_id & FLASH_VENDMASK) {
 	case (AMD_MANUFACT & FLASH_VENDMASK):
 		puts("AMD: ");
 		break;
 	default:
 		puts("Unknown vendor ");
 		break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case (AMD_ID_LV800B & FLASH_TYPEMASK):
 		puts("AM29LV800BB (8Mb)\n");
 		break;
 	default:
 		puts("Unknown chip type\n");
 		return;
 	}

 	printf("  Size: %ld MB in %d sectors\n",
 	       info->size >> 20, info->sector_count);

 	puts("  Sector start addresses:");
 	for (i = 0; i < info->sector_count; i++) {
 		if ((i % 5) == 0)
 			puts("\n   ");

 		printf(" %08lX%s", info->start[i],
 		       info->protect[i] ? " (RO)" : "     ");
 	}
 	puts("\n");
 }

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

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

 	/* first look for protection bits */

 	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) !=
 	    (AMD_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)
 		printf("- Warning: %d protected sectors will not be erased!\n",
 		       prot);
 	else
 		putc('\n');

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

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

 			MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 			MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 			MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;

 			MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 			MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 			*addr = CMD_ERASE_CONFIRM;

 			/* wait until flash is ready */
 			while (1) {
 				result = *addr;

 				/* check timeout */
 				if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
 					MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
 					rc = ERR_TIMOUT;
 					break;
 				}

 				if ((result & 0xfff) & BIT_ERASE_DONE)
 					break;

 				if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
 					rc = ERR_PROG_ERROR;
 					break;
 				}
 			}

 			MEM_FLASH_ADDR1 = CMD_READ_ARRAY;

 			if (rc != ERR_OK)
 				goto out;

 			putc('.');
 		}
 	}
 out:
 	/* allow flash to settle - wait 10 ms */
 	udelay_masked(10000);

 	return rc;
 }

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

 static int write_hword(flash_info_t *info, ulong dest, ushort data)
 {
 	vu_short *addr = (vu_short *) dest;
 	ushort result;
 	int rc = ERR_OK;

 	/* check if flash is (sufficiently) erased */
 	result = *addr;
 	if ((result & data) != data)
 		return ERR_NOT_ERASED;

 	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
 	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
 	MEM_FLASH_ADDR1 = CMD_PROGRAM;
 	*addr = data;

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

 	/* wait until flash is ready */
 	while (1) {
 		result = *addr;

 		/* check timeout */
 		if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
 			rc = ERR_TIMOUT;
 			break;
 		}

 		if ((result & 0x80) == (data & 0x80))
 			break;

 		if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
 			result = *addr;

 			if ((result & 0x80) != (data & 0x80))
 				rc = ERR_PROG_ERROR;
 		}
 	}

 	*addr = CMD_READ_ARRAY;

 	if (*addr != data)
 		rc = ERR_PROG_ERROR;

 	return rc;
 }

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

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

 	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_hword(info, wp, data)) != 0)
 			return (rc);
 		wp += 2;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cnt >= 2) {
 		data = *((vu_short *) src);
 		if ((rc = write_hword(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_hword(info, wp, data);
 }

 #endif
	/*
	* (C) Copyright 2002
	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	* Alex Zuepke <azu@sysgo.de>
	*
	* (C) Copyright 2005
	* 2N Telekomunikace, a.s. <www.2n.cz>
	* Ladislav Michl <michl@2n.cz>
	*
	* 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>

	/#if 0 /
	#if (PHYS_SDRAM_1_SIZE != SZ_32M)

	#include "crcek.h"

	#if (CFG_MAX_FLASH_BANKS > 1)
	#error There is always only _one_ flash chip
	#endif

	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

	#define CMD_READ_ARRAY 0x000000f0
	#define CMD_UNLOCK1 0x000000aa
	#define CMD_UNLOCK2 0x00000055
	#define CMD_ERASE_SETUP 0x00000080
	#define CMD_ERASE_CONFIRM 0x00000030
	#define CMD_PROGRAM 0x000000a0
	#define CMD_UNLOCK_BYPASS 0x00000020

	#define MEM_FLASH_ADDR1 ((volatile u16 )(CFG_FLASH_BASE + (0x00000555 << 1)))
	#define MEM_FLASH_ADDR2 ((volatile u16 )(CFG_FLASH_BASE + (0x000002aa << 1)))

	#define BIT_ERASE_DONE 0x00000080
	#define BIT_RDY_MASK 0x00000080
	#define BIT_PROGRAM_ERROR 0x00000020
	#define BIT_TIMEOUT 0x80000000 /* our flag */

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

	ulong flash_init(void)
	{
	int i;

	flash_info[0].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) \|
	(AMD_ID_LV800B & FLASH_TYPEMASK);
	flash_info[0].size = PHYS_FLASH_1_SIZE;
	flash_info[0].sector_count = CFG_MAX_FLASH_SECT;
	memset(flash_info[0].protect, 0, CFG_MAX_FLASH_SECT);

	for (i = 0; i < flash_info[0].sector_count; i++) {
	switch (i) {
	case 0: /* 16kB */
	flash_info[0].start[0] = CFG_FLASH_BASE;
	break;
	case 1: /* 8kB */
	flash_info[0].start[1] = CFG_FLASH_BASE + 0x4000;
	break;
	case 2: /* 8kB */
	flash_info[0].start[2] = CFG_FLASH_BASE + 0x4000 +
	0x2000;
	break;
	case 3: /* 32 KB */
	flash_info[0].start[3] = CFG_FLASH_BASE + 0x4000 +
	2 * 0x2000;
	break;
	case 4:
	flash_info[0].start[4] = CFG_FLASH_BASE + 0x4000 +
	2 * 0x2000 + 0x8000;
	break;
	default: /* 64kB */
	flash_info[0].start[i] = flash_info[0].start[i-1] +
	0x10000;
	break;
	}
	}

	/* U-Boot */
	flash_protect(FLAG_PROTECT_SET,
	LOADER1_OFFSET,
	LOADER1_OFFSET + LOADER_SIZE - 1, flash_info);
	/* Protect crcek, env and r_env as well */
	flash_protect(FLAG_PROTECT_SET, 0, 0x8000 - 1, flash_info);

	return flash_info[0].size;
	}

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

	switch (info->flash_id & FLASH_VENDMASK) {
	case (AMD_MANUFACT & FLASH_VENDMASK):
	puts("AMD: ");
	break;
	default:
	puts("Unknown vendor ");
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case (AMD_ID_LV800B & FLASH_TYPEMASK):
	puts("AM29LV800BB (8Mb)\n");
	break;
	default:
	puts("Unknown chip type\n");
	return;
	}

	printf(" Size: %ld MB in %d sectors\n",
	info->size >> 20, info->sector_count);

	puts(" Sector start addresses:");
	for (i = 0; i < info->sector_count; i++) {
	if ((i % 5) == 0)
	puts("\n ");

	printf(" %08lX%s", info->start[i],
	info->protect[i] ? " (RO)" : " ");
	}
	puts("\n");
	}

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

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

	/* first look for protection bits */

	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) !=
	(AMD_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)
	printf("- Warning: %d protected sectors will not be erased!\n",
	prot);
	else
	putc('\n');

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

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

	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;

	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	*addr = CMD_ERASE_CONFIRM;

	/* wait until flash is ready */
	while (1) {
	result = *addr;

	/* check timeout */
	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
	MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
	rc = ERR_TIMOUT;
	break;
	}

	if ((result & 0xfff) & BIT_ERASE_DONE)
	break;

	if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
	rc = ERR_PROG_ERROR;
	break;
	}
	}

	MEM_FLASH_ADDR1 = CMD_READ_ARRAY;

	if (rc != ERR_OK)
	goto out;

	putc('.');
	}
	}
	out:
	/* allow flash to settle - wait 10 ms */
	udelay_masked(10000);

	return rc;
	}

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

	static int write_hword(flash_info_t *info, ulong dest, ushort data)
	{
	vu_short addr = (vu_short ) dest;
	ushort result;
	int rc = ERR_OK;

	/* check if flash is (sufficiently) erased */
	result = *addr;
	if ((result & data) != data)
	return ERR_NOT_ERASED;

	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	MEM_FLASH_ADDR1 = CMD_PROGRAM;
	*addr = data;

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

	/* wait until flash is ready */
	while (1) {
	result = *addr;

	/* check timeout */
	if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
	rc = ERR_TIMOUT;
	break;
	}

	if ((result & 0x80) == (data & 0x80))
	break;

	if ((result & 0xffff) & BIT_PROGRAM_ERROR) {
	result = *addr;

	if ((result & 0x80) != (data & 0x80))
	rc = ERR_PROG_ERROR;
	}
	}

	*addr = CMD_READ_ARRAY;

	if (*addr != data)
	rc = ERR_PROG_ERROR;

	return rc;
	}

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

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

	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_hword(info, wp, data)) != 0)
	return (rc);
	wp += 2;
	}

	/*
	* handle word aligned part
	*/
	while (cnt >= 2) {
	data = ((vu_short ) src);
	if ((rc = write_hword(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_hword(info, wp, data);
	}

	#endif