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

 /*
  * (C) Copyright 2000-2011
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <mpc8xx.h>

 flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

 /*-----------------------------------------------------------------------
  * Functions
  */
 static ulong flash_get_size(vu_long *addr, flash_info_t *info);
 static int write_word(flash_info_t *info, ulong dest, ulong data);
 static void flash_get_offsets(ulong base, flash_info_t *info);

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

 unsigned long flash_init(void)
 {
 	unsigned long size_b0;
 	int i;

 	/* Init: no FLASHes known */
 	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
 		flash_info[i].flash_id = FLASH_UNKNOWN;

 	/* Detect size */
 	size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE,
 			&flash_info[0]);

 	/* Setup offsets */
 	flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);

 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 	/* Monitor protection ON by default */
 	flash_protect(FLAG_PROTECT_SET,
 		      CONFIG_SYS_MONITOR_BASE,
 		      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 		      &flash_info[0]);
 #endif

 	flash_info[0].size = size_b0;

 	return size_b0;
 }

 /*-----------------------------------------------------------------------
  * Fix this to support variable sector sizes
 */
 static void flash_get_offsets(ulong base, flash_info_t *info)
 {
 	int i;

 	/* set up sector start address table */
 	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
 		/* set sector offsets for bottom boot block type	*/
 		for (i = 0; i < info->sector_count; i++)
 			info->start[i] = base + (i * 0x00010000);
 	}
 }

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

 	if (info->flash_id == FLASH_UNKNOWN) {
 		puts("missing or unknown FLASH type\n");
 		return;
 	}

 	switch (info->flash_id & FLASH_VENDMASK) {
 	case FLASH_MAN_AMD:
 		printf("AMD ");
 		break;
 	case FLASH_MAN_FUJ:
 		printf("FUJITSU ");
 		break;
 	case FLASH_MAN_BM:
 		printf("BRIGHT MICRO ");
 		break;
 	default:
 		printf("Unknown Vendor ");
 		break;
 	}

 	switch (info->flash_id & FLASH_TYPEMASK) {
 	case FLASH_AM040:
 		printf("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
 		break;
 	case FLASH_AM400B:
 		printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
 		break;
 	case FLASH_AM400T:
 		printf("AM29LV400T (4 Mbit, top boot sector)\n");
 		break;
 	case FLASH_AM800B:
 		printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
 		break;
 	case FLASH_AM800T:
 		printf("AM29LV800T (8 Mbit, top boot sector)\n");
 		break;
 	case FLASH_AM160B:
 		printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
 		break;
 	case FLASH_AM160T:
 		printf("AM29LV160T (16 Mbit, top boot sector)\n");
 		break;
 	case FLASH_AM320B:
 		printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
 		break;
 	case FLASH_AM320T:
 		printf("AM29LV320T (32 Mbit, top boot sector)\n");
 		break;
 	default:
 		printf("Unknown Chip Type\n");
 		break;
 	}

 	if (info->size >> 20) {
 		printf("  Size: %ld MB in %d Sectors\n",
 			info->size >> 20,
 			info->sector_count);
 	} else {
 		printf("  Size: %ld KB in %d Sectors\n",
 			info->size >> 10,
 			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)" : "     ");
 	}

 	putc('\n');
 	return;
 }
 /*-----------------------------------------------------------------------
  */

 /*
  * The following code cannot be run from FLASH!
  */

 static ulong flash_get_size(vu_long *addr, flash_info_t *info)
 {
 	short i;
 	volatile unsigned char *caddr;
 	char value;

 	caddr = (volatile unsigned char *)addr ;

 	/* Write auto select command: read Manufacturer ID */

 	debug("Base address is: %8p\n", caddr);

 	caddr[0x0555] = 0xAA;
 	caddr[0x02AA] = 0x55;
 	caddr[0x0555] = 0x90;

 	value = caddr[0];

 	debug("Manufact ID: %02x\n", value);

 	switch (value) {
 	case 0x1: /* AMD_MANUFACT */
 		info->flash_id = FLASH_MAN_AMD;
 		break;
 	case 0x4: /* FUJ_MANUFACT */
 		info->flash_id = FLASH_MAN_FUJ;
 		break;
 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		info->sector_count = 0;
 		info->size = 0;
 		break;
 	}

 	value = caddr[1];			/* device ID		*/

 	debug("Device ID: %02x\n", value);

 	switch (value) {
 	case AMD_ID_LV040B:
 		info->flash_id += FLASH_AM040;
 		info->sector_count = 8;
 		info->size = 0x00080000;
 		break;				/* => 512Kb		*/

 	default:
 		info->flash_id = FLASH_UNKNOWN;
 		return 0;			/* => no or unknown flash */
 	}

 	flash_get_offsets((ulong)addr, &flash_info[0]);

 	/* check for protected sectors */
 	for (i = 0; i < info->sector_count; i++) {
 		/*
 		 * read sector protection at sector address,
 		 * (A7 .. A0) = 0x02
 		 * D0 = 1 if protected
 		 */
 		caddr = (volatile unsigned char *)(info->start[i]);
 		info->protect[i] = caddr[2] & 1;
 	}

 	/*
 	 * Prevent writes to uninitialized FLASH.
 	 */
 	if (info->flash_id != FLASH_UNKNOWN) {
 		caddr = (volatile unsigned char *)info->start[0];
 		*caddr = 0xF0;	/* reset bank */
 	}

 	return info->size;
 }

 int	flash_erase(flash_info_t *info, int s_first, int s_last)
 {
 	volatile unsigned char *addr =
 		(volatile unsigned char *)(info->start[0]);
 	int flag, prot, sect, l_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;
 	}

 	if ((info->flash_id == FLASH_UNKNOWN) ||
 	    (info->flash_id > FLASH_AMD_COMP)) {
 		printf("Can't erase unknown flash type - 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");
 	}

 	l_sect = -1;

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

 	addr[0x0555] = 0xAA;
 	addr[0x02AA] = 0x55;
 	addr[0x0555] = 0x80;
 	addr[0x0555] = 0xAA;
 	addr[0x02AA] = 0x55;

 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect <= s_last; sect++) {
 		if (info->protect[sect] == 0) {	/* not protected */
 			addr = (volatile unsigned char *)(info->start[sect]);
 			addr[0] = 0x30;
 			l_sect = sect;
 		}
 	}

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

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

 	/*
 	 * We wait for the last triggered sector
 	 */
 	if (l_sect < 0)
 		goto DONE;

 	start = get_timer(0);
 	last  = start;
 	addr = (volatile unsigned char *)(info->start[l_sect]);

 	while ((addr[0] & 0xFF) != 0xFF) {

 		now = get_timer(start);

 		if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
 			printf("Timeout\n");
 			return 1;
 		}
 		/* show that we're waiting */
 		if ((now - last) > 1000) {	/* every second */
 			putc('.');
 			last = now;
 		}
 	}

 DONE:
 	/* reset to read mode */
 	addr = (volatile unsigned char *)info->start[0];

 	addr[0] = 0xF0;	/* reset bank */

 	printf(" done\n");
 	return 0;
 }

 /*-----------------------------------------------------------------------
  * 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 cp, wp, data;
 	int i, l, rc;

 	wp = (addr & ~3);	/* get lower word aligned address */

 	/*
 	 * handle unaligned start bytes
 	 */
 	l = addr - wp;

 	if (l != 0) {
 		data = 0;
 		for (i = 0, cp = wp; i < l; ++i, ++cp)
 			data = (data << 8) | (*(uchar *)cp);

 		for (; i < 4 && cnt > 0; ++i) {
 			data = (data << 8) | *src++;
 			--cnt;
 			++cp;
 		}
 		for (; cnt == 0 && i < 4; ++i, ++cp)
 			data = (data << 8) | (*(uchar *)cp);

 		rc = write_word(info, wp, data);

 		if (rc != 0)
 			return rc;

 		wp += 4;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cnt >= 4) {
 		data = 0;
 		for (i = 0; i < 4; ++i)
 			data = (data << 8) | *src++;

 		rc = write_word(info, wp, data);

 		if (rc != 0)
 			return rc;

 		wp  += 4;
 		cnt -= 4;
 	}

 	if (cnt == 0)
 		return 0;

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

 	return write_word(info, wp, data);
 }

 /*-----------------------------------------------------------------------
  * Write a word to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 static int write_word(flash_info_t *info, ulong dest, ulong data)
 {
 	volatile unsigned char *cdest, *cdata;
 	volatile unsigned char *addr =
 		(volatile unsigned char *)(info->start[0]);
 	ulong start;
 	int flag, count = 4 ;

 	cdest = (volatile unsigned char *)dest ;
 	cdata = (volatile unsigned char *)&data ;

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

 	while (count--) {

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

 		addr[0x0555] = 0xAA;
 		addr[0x02AA] = 0x55;
 		addr[0x0555] = 0xA0;

 		*cdest = *cdata;

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

 		/* data polling for D7 */
 		start = get_timer(0);
 		while ((*cdest ^ *cdata) & 0x80) {
 			if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
 				return 1;
 		}

 		cdata++ ;
 		cdest++ ;
 	}
 	return 0;
 }
	/*
	* (C) Copyright 2000-2011
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <mpc8xx.h>

	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

	/*-----------------------------------------------------------------------
	* Functions
	*/
	static ulong flash_get_size(vu_long addr, flash_info_t info);
	static int write_word(flash_info_t *info, ulong dest, ulong data);
	static void flash_get_offsets(ulong base, flash_info_t *info);

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

	unsigned long flash_init(void)
	{
	unsigned long size_b0;
	int i;

	/* Init: no FLASHes known */
	for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
	flash_info[i].flash_id = FLASH_UNKNOWN;

	/* Detect size */
	size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE,
	&flash_info[0]);

	/* Setup offsets */
	flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);

	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
	/* Monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
	CONFIG_SYS_MONITOR_BASE,
	CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
	&flash_info[0]);
	#endif

	flash_info[0].size = size_b0;

	return size_b0;
	}

	/*-----------------------------------------------------------------------
	* Fix this to support variable sector sizes
	*/
	static void flash_get_offsets(ulong base, flash_info_t *info)
	{
	int i;

	/* set up sector start address table */
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
	/* set sector offsets for bottom boot block type */
	for (i = 0; i < info->sector_count; i++)
	info->start[i] = base + (i * 0x00010000);
	}
	}

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

	if (info->flash_id == FLASH_UNKNOWN) {
	puts("missing or unknown FLASH type\n");
	return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:
	printf("AMD ");
	break;
	case FLASH_MAN_FUJ:
	printf("FUJITSU ");
	break;
	case FLASH_MAN_BM:
	printf("BRIGHT MICRO ");
	break;
	default:
	printf("Unknown Vendor ");
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:
	printf("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
	break;
	case FLASH_AM400B:
	printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM400T:
	printf("AM29LV400T (4 Mbit, top boot sector)\n");
	break;
	case FLASH_AM800B:
	printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM800T:
	printf("AM29LV800T (8 Mbit, top boot sector)\n");
	break;
	case FLASH_AM160B:
	printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM160T:
	printf("AM29LV160T (16 Mbit, top boot sector)\n");
	break;
	case FLASH_AM320B:
	printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
	break;
	case FLASH_AM320T:
	printf("AM29LV320T (32 Mbit, top boot sector)\n");
	break;
	default:
	printf("Unknown Chip Type\n");
	break;
	}

	if (info->size >> 20) {
	printf(" Size: %ld MB in %d Sectors\n",
	info->size >> 20,
	info->sector_count);
	} else {
	printf(" Size: %ld KB in %d Sectors\n",
	info->size >> 10,
	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)" : " ");
	}

	putc('\n');
	return;
	}
	/*-----------------------------------------------------------------------
	*/

	/*
	* The following code cannot be run from FLASH!
	*/

	static ulong flash_get_size(vu_long addr, flash_info_t info)
	{
	short i;
	volatile unsigned char *caddr;
	char value;

	caddr = (volatile unsigned char *)addr ;

	/* Write auto select command: read Manufacturer ID */

	debug("Base address is: %8p\n", caddr);

	caddr[0x0555] = 0xAA;
	caddr[0x02AA] = 0x55;
	caddr[0x0555] = 0x90;

	value = caddr[0];

	debug("Manufact ID: %02x\n", value);

	switch (value) {
	case 0x1: /* AMD_MANUFACT */
	info->flash_id = FLASH_MAN_AMD;
	break;
	case 0x4: /* FUJ_MANUFACT */
	info->flash_id = FLASH_MAN_FUJ;
	break;
	default:
	info->flash_id = FLASH_UNKNOWN;
	info->sector_count = 0;
	info->size = 0;
	break;
	}

	value = caddr[1]; /* device ID */

	debug("Device ID: %02x\n", value);

	switch (value) {
	case AMD_ID_LV040B:
	info->flash_id += FLASH_AM040;
	info->sector_count = 8;
	info->size = 0x00080000;
	break; /* => 512Kb */

	default:
	info->flash_id = FLASH_UNKNOWN;
	return 0; /* => no or unknown flash */
	}

	flash_get_offsets((ulong)addr, &flash_info[0]);

	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
	/*
	* read sector protection at sector address,
	* (A7 .. A0) = 0x02
	* D0 = 1 if protected
	*/
	caddr = (volatile unsigned char *)(info->start[i]);
	info->protect[i] = caddr[2] & 1;
	}

	/*
	* Prevent writes to uninitialized FLASH.
	*/
	if (info->flash_id != FLASH_UNKNOWN) {
	caddr = (volatile unsigned char *)info->start[0];
	caddr = 0xF0; / reset bank */
	}

	return info->size;
	}

	int flash_erase(flash_info_t *info, int s_first, int s_last)
	{
	volatile unsigned char *addr =
	(volatile unsigned char *)(info->start[0]);
	int flag, prot, sect, l_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;
	}

	if ((info->flash_id == FLASH_UNKNOWN) \|\|
	(info->flash_id > FLASH_AMD_COMP)) {
	printf("Can't erase unknown flash type - 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");
	}

	l_sect = -1;

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

	addr[0x0555] = 0xAA;
	addr[0x02AA] = 0x55;
	addr[0x0555] = 0x80;
	addr[0x0555] = 0xAA;
	addr[0x02AA] = 0x55;

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
	if (info->protect[sect] == 0) { /* not protected */
	addr = (volatile unsigned char *)(info->start[sect]);
	addr[0] = 0x30;
	l_sect = sect;
	}
	}

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

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

	/*
	* We wait for the last triggered sector
	*/
	if (l_sect < 0)
	goto DONE;

	start = get_timer(0);
	last = start;
	addr = (volatile unsigned char *)(info->start[l_sect]);

	while ((addr[0] & 0xFF) != 0xFF) {

	now = get_timer(start);

	if (now > CONFIG_SYS_FLASH_ERASE_TOUT) {
	printf("Timeout\n");
	return 1;
	}
	/* show that we're waiting */
	if ((now - last) > 1000) { /* every second */
	putc('.');
	last = now;
	}
	}

	DONE:
	/* reset to read mode */
	addr = (volatile unsigned char *)info->start[0];

	addr[0] = 0xF0; /* reset bank */

	printf(" done\n");
	return 0;
	}

	/*-----------------------------------------------------------------------
	* 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 cp, wp, data;
	int i, l, rc;

	wp = (addr & ~3); /* get lower word aligned address */

	/*
	* handle unaligned start bytes
	*/
	l = addr - wp;

	if (l != 0) {
	data = 0;
	for (i = 0, cp = wp; i < l; ++i, ++cp)
	data = (data << 8) \| ((uchar )cp);

	for (; i < 4 && cnt > 0; ++i) {
	data = (data << 8) \| *src++;
	--cnt;
	++cp;
	}
	for (; cnt == 0 && i < 4; ++i, ++cp)
	data = (data << 8) \| ((uchar )cp);

	rc = write_word(info, wp, data);

	if (rc != 0)
	return rc;

	wp += 4;
	}

	/*
	* handle word aligned part
	*/
	while (cnt >= 4) {
	data = 0;
	for (i = 0; i < 4; ++i)
	data = (data << 8) \| *src++;

	rc = write_word(info, wp, data);

	if (rc != 0)
	return rc;

	wp += 4;
	cnt -= 4;
	}

	if (cnt == 0)
	return 0;

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

	return write_word(info, wp, data);
	}

	/*-----------------------------------------------------------------------
	* Write a word to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	static int write_word(flash_info_t *info, ulong dest, ulong data)
	{
	volatile unsigned char cdest, cdata;
	volatile unsigned char *addr =
	(volatile unsigned char *)(info->start[0]);
	ulong start;
	int flag, count = 4 ;

	cdest = (volatile unsigned char *)dest ;
	cdata = (volatile unsigned char *)&data ;

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

	while (count--) {

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

	addr[0x0555] = 0xAA;
	addr[0x02AA] = 0x55;
	addr[0x0555] = 0xA0;

	cdest = cdata;

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

	/* data polling for D7 */
	start = get_timer(0);
	while ((cdest ^ cdata) & 0x80) {
	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT)
	return 1;
	}

	cdata++ ;
	cdest++ ;
	}
	return 0;
	}