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

 /*
  * (C) Copyright 2002
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Marius Groeger <mgroeger@sysgo.de>
  *
  * (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
  * Flash driver for armadillo board HT1070
  *
  * 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 0x400000

 /*value used by hermit is 0x200*/
 /*document says sector size is either 64k in low mem reg and 8k in high mem reg*/
 #define MAIN_SECT_SIZE  0x10000

 #define UNALIGNED_MASK (3)
 #define FL_WORD(addr) (*(volatile unsigned short*)(addr))
 #define FLASH_TIMEOUT 20000000

 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

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

 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 = (FUJ_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);
 		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,
 		       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;
 }

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

 	switch (info->flash_id & FLASH_VENDMASK) {
 	case (FUJ_MANUFACT & FLASH_VENDMASK):
 		printf ("Fujitsu: ");
 		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:	;
 */
 }

 /*
  *  * Loop until both write state machines complete.
  *   */
 static unsigned short flash_status_wait (unsigned long addr,
 					 unsigned short value)
 {
 	unsigned short status;
 	long timeout = FLASH_TIMEOUT;

 	while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
 		timeout--;
 	}
 	return status;
 }

 /*
  * Loop until the Write State machine is ready, then do a full error
  * check.  Clear status and leave the flash in Read Array mode; return
  * 0 for no error, -1 for error.
  */
 static int flash_status_full_check (unsigned long addr, unsigned short value1,
 				    unsigned short value2)
 {
 	unsigned short status1, status2;

 	status1 = flash_status_wait (addr, value1);
 	status2 = flash_status_wait (addr + 2, value2);
 	return (status1 != value1 || status2 != value2) ? -1 : 0;
 }

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

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

 	if ((info->flash_id & FLASH_VENDMASK) !=
 	    (FUJ_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 ();

 	printf ("Erasing %d sectors starting at sector %2d.\n"
 		"This make take some time ... ",
 		s_last - s_first, sect);
 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
 		/* ARM simple, non interrupt dependent timer */
 		reset_timer_masked ();

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

 			addr = sect * MAIN_SECT_SIZE;
 			addr &= ~(unsigned long) UNALIGNED_MASK;	/* word align */
 			base = addr & 0xF0000000;

 			FL_WORD (base + (0x555 << 1)) = 0xAA;
 			FL_WORD (base + (0x2AA << 1)) = 0x55;
 			FL_WORD (base + (0x555 << 1)) = 0x80;
 			FL_WORD (base + (0x555 << 1)) = 0xAA;
 			FL_WORD (base + (0x2AA << 1)) = 0x55;
 			FL_WORD (addr) = 0x30;
 			if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
 				return ERR_PROTECTED;
 		}
 	}
 	printf ("\nDone.\n");
 	if (ctrlc ())
 		printf ("User Interrupt!\n");

 	/* 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)
 {
 	int flag;
 	unsigned long base;

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

 	/*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */

 	/*
 	 * 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 ();

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

 	base = dest & 0xF0000000;
 	FL_WORD (base + (0x555 << 1)) = 0xAA;
 	FL_WORD (base + (0x2AA << 1)) = 0x55;
 	FL_WORD (base + (0x555 << 1)) = 0xA0;
 	FL_WORD (dest) = data;
 	/*printf("writing 0x%p = 0x%x\n",dest,data); */
 	if (flash_status_wait (dest, data) != data)
 		return ERR_PROG_ERROR;

 	if (flag)
 		enable_interrupts ();

 	return ERR_OK;
 }

 /*-----------------------------------------------------------------------
  * 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 */
 	printf ("Writing %d short data to 0x%p from 0x%p.\n ", cnt, wp, src);

 	/*
 	 * 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) {
 		printf ("\nDone.\n");
 		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>
	*
	* (C) Copyright 2005 Rowel Atienza <rowel@diwalabs.com>
	* Flash driver for armadillo board HT1070
	*
	* 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 0x400000

	/value used by hermit is 0x200/
	/document says sector size is either 64k in low mem reg and 8k in high mem reg/
	#define MAIN_SECT_SIZE 0x10000

	#define UNALIGNED_MASK (3)
	#define FL_WORD(addr) ((volatile unsigned short)(addr))
	#define FLASH_TIMEOUT 20000000

	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

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

	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 = (FUJ_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);
	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,
	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;
	}

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

	switch (info->flash_id & FLASH_VENDMASK) {
	case (FUJ_MANUFACT & FLASH_VENDMASK):
	printf ("Fujitsu: ");
	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: ;
	*/
	}

	/*
	* * Loop until both write state machines complete.
	* */
	static unsigned short flash_status_wait (unsigned long addr,
	unsigned short value)
	{
	unsigned short status;
	long timeout = FLASH_TIMEOUT;

	while (((status = (FL_WORD (addr))) != value) && timeout > 0) {
	timeout--;
	}
	return status;
	}

	/*
	* Loop until the Write State machine is ready, then do a full error
	* check. Clear status and leave the flash in Read Array mode; return
	* 0 for no error, -1 for error.
	*/
	static int flash_status_full_check (unsigned long addr, unsigned short value1,
	unsigned short value2)
	{
	unsigned short status1, status2;

	status1 = flash_status_wait (addr, value1);
	status2 = flash_status_wait (addr + 2, value2);
	return (status1 != value1 \|\| status2 != value2) ? -1 : 0;
	}

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

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

	if ((info->flash_id & FLASH_VENDMASK) !=
	(FUJ_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 ();

	printf ("Erasing %d sectors starting at sector %2d.\n"
	"This make take some time ... ",
	s_last - s_first, sect);
	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
	/* ARM simple, non interrupt dependent timer */
	reset_timer_masked ();

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

	addr = sect * MAIN_SECT_SIZE;
	addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */
	base = addr & 0xF0000000;

	FL_WORD (base + (0x555 << 1)) = 0xAA;
	FL_WORD (base + (0x2AA << 1)) = 0x55;
	FL_WORD (base + (0x555 << 1)) = 0x80;
	FL_WORD (base + (0x555 << 1)) = 0xAA;
	FL_WORD (base + (0x2AA << 1)) = 0x55;
	FL_WORD (addr) = 0x30;
	if (flash_status_full_check (addr, 0xFFFF, 0xFFFF))
	return ERR_PROTECTED;
	}
	}
	printf ("\nDone.\n");
	if (ctrlc ())
	printf ("User Interrupt!\n");

	/* 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)
	{
	int flag;
	unsigned long base;

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

	/if(dest & UNALIGNED_MASK) return ERR_ALIGN; /

	/*
	* 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 ();

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

	base = dest & 0xF0000000;
	FL_WORD (base + (0x555 << 1)) = 0xAA;
	FL_WORD (base + (0x2AA << 1)) = 0x55;
	FL_WORD (base + (0x555 << 1)) = 0xA0;
	FL_WORD (dest) = data;
	/printf("writing 0x%p = 0x%x\n",dest,data); /
	if (flash_status_wait (dest, data) != data)
	return ERR_PROG_ERROR;

	if (flag)
	enable_interrupts ();

	return ERR_OK;
	}

	/*-----------------------------------------------------------------------
	* 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 */
	printf ("Writing %d short data to 0x%p from 0x%p.\n ", cnt, wp, src);

	/*
	* 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) {
	printf ("\nDone.\n");
	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);
	}