board/oxc/flash.c - u-boot - Git at Google

 /*
  * (C) Copyright 2000
  * Marius Groeger <mgroeger@sysgo.de>
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * Flash Routines for STM29W320DB/STM29W800D flash chips
  *
  *--------------------------------------------------------------------
  * 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 <mpc8xx.h>

 flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/

 /*-----------------------------------------------------------------------
  * Functions
  */

 static ulong flash_get_size (vu_char *addr, flash_info_t *info);
 static int write_byte (flash_info_t *info, ulong dest, uchar data);

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

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

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

     /*
      * We use the following trick here: since flash is cyclically
      * mapped in the 0xFF800000-0xFFFFFFFF area, we detect the type
      * and the size of flash using 0xFF800000 as the base address,
      * and then call flash_get_size() again to fill flash_info.
      */
     size = flash_get_size((vu_char *)CONFIG_SYS_FLASH_PRELIMBASE, &flash_info[0]);
     if (size)
     {
 	flash_get_size((vu_char *)(-size), &flash_info[0]);
     }

 #if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_PRELIMBASE)
     /* 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

 #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
 # ifndef  CONFIG_ENV_SIZE
 #  define CONFIG_ENV_SIZE	CONFIG_ENV_SECT_SIZE
 # endif
     flash_protect(FLAG_PROTECT_SET,
 		  CONFIG_ENV_ADDR,
 		  CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
 		  &flash_info[0]);
 #endif

     return (size);
 }

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

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

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

     switch (info->flash_id & FLASH_TYPEMASK) {
     case FLASH_STM320DB:
 	printf ("M29W320DB (32 Mbit)\n");
 	break;
     case FLASH_STM800DB:
 	printf ("M29W800DB (8 Mbit, bottom boot block)\n");
 	break;
     case FLASH_STM800DT:
 	printf ("M29W800DT (8 Mbit, top boot block)\n");
 	break;
     default:
 	printf ("Unknown Chip Type\n");
 	break;
     }

     printf ("  Size: %ld KB in %d Sectors\n",
 	    info->size >> 10, 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");
     return;
 }

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

 static ulong flash_get_size (vu_char *addr, flash_info_t *info)
 {
     short i;
     uchar vendor, devid;
     ulong base = (ulong)addr;

     /* Write auto select command: read Manufacturer ID */
     addr[0x0AAA] = 0xAA;
     addr[0x0555] = 0x55;
     addr[0x0AAA] = 0x90;

     udelay(1000);

     vendor = addr[0];
     devid = addr[2];

     /* only support STM */
     if ((vendor << 16) != FLASH_MAN_STM) {
 	return 0;
     }

     if (devid == FLASH_STM320DB) {
 	/* MPC8240 can address maximum 2Mb of flash, that is why the MSB
 	 * lead is grounded and we can access only 2 first Mb */
 	info->flash_id     = vendor << 16 | devid;
 	info->sector_count = 32;
 	info->size         = info->sector_count * 0x10000;
 	for (i = 0; i < info->sector_count; i++) {
 	    info->start[i] = base + i * 0x10000;
 	}
     }
     else if (devid == FLASH_STM800DB) {
 	info->flash_id     = vendor << 16 | devid;
 	info->sector_count = 19;
 	info->size         = 0x100000;
 	info->start[0]     = 0x0000;
 	info->start[1]     = 0x4000;
 	info->start[2]     = 0x6000;
 	info->start[3]     = 0x8000;
 	for (i = 4; i < info->sector_count; i++) {
 	    info->start[i] = base + (i-3) * 0x10000;
 	}
     }
     else if (devid == FLASH_STM800DT) {
 	info->flash_id     = vendor << 16 | devid;
 	info->sector_count = 19;
 	info->size         = 0x100000;
 	for (i = 0; i < info->sector_count-4; i++) {
 	    info->start[i] = base + i * 0x10000;
 	}
 	info->start[i]     = base + i * 0x10000;
 	info->start[i+1]   = base + i * 0x10000 + 0x8000;
 	info->start[i+2]   = base + i * 0x10000 + 0xa000;
 	info->start[i+3]   = base + i * 0x10000 + 0xc000;
     }
     else {
 	return 0;
     }

     /* mark all sectors as unprotected */
     for (i = 0; i < info->sector_count; i++) {
 	info->protect[i] = 0;
     }

     /* Issue the reset command */
     if (info->flash_id != FLASH_UNKNOWN) {
 	addr[0] = 0xF0;	/* reset bank */
     }

     return (info->size);
 }


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

 int	flash_erase (flash_info_t *info, int s_first, int s_last)
 {
     vu_char *addr = (vu_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;
     }

     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[0x0AAA] = 0xAA;
     addr[0x0555] = 0x55;
     addr[0x0AAA] = 0x80;
     addr[0x0AAA] = 0xAA;
     addr[0x0555] = 0x55;

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

     /* Start erase on unprotected sectors */
     for (sect = s_first; sect<=s_last; sect++) {
 	if (info->protect[sect] == 0) {	/* not protected */
 	    addr = (vu_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 = (vu_char *)(info->start[l_sect]);
     while ((addr[0] & 0x80) != 0x80) {
 	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
 	    printf ("Timeout\n");
 	    return 1;
 	}
 	/* show that we're waiting */
 	if ((now - last) > 1000) {	/* every second */
 	    serial_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)
 {
     int rc;

     while (cnt > 0) {
 	if ((rc = write_byte(info, addr, *src)) != 0) {
 	    return (rc);
 	}
 	addr++;
 	src++;
 	cnt--;
     }

     return (0);
 }

 /*-----------------------------------------------------------------------
  * Write a byte to Flash, returns:
  * 0 - OK
  * 1 - write timeout
  * 2 - Flash not erased
  */
 static int write_byte (flash_info_t *info, ulong dest, uchar data)
 {
     vu_char *addr = (vu_char *)(info->start[0]);
     ulong start;
     int flag;

     /* Check if Flash is (sufficiently) erased */
     if ((*((vu_char *)dest) & data) != data) {
 	return (2);
     }
     /* Disable interrupts which might cause a timeout here */
     flag = disable_interrupts();

     addr[0x0AAA] = 0xAA;
     addr[0x0555] = 0x55;
     addr[0x0AAA] = 0xA0;

     *((vu_char *)dest) = data;

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

     /* data polling for D7 */
     start = get_timer (0);
     while ((*((vu_char *)dest) & 0x80) != (data & 0x80)) {
 	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
 	    return (1);
 	}
     }
     return (0);
 }

 /*-----------------------------------------------------------------------
  */
	/*
	* (C) Copyright 2000
	* Marius Groeger <mgroeger@sysgo.de>
	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	*
	* (C) Copyright 2000
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* Flash Routines for STM29W320DB/STM29W800D flash chips
	*
	*--------------------------------------------------------------------
	* 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 <mpc8xx.h>

	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */

	/*-----------------------------------------------------------------------
	* Functions
	*/

	static ulong flash_get_size (vu_char addr, flash_info_t info);
	static int write_byte (flash_info_t *info, ulong dest, uchar data);

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

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

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

	/*
	* We use the following trick here: since flash is cyclically
	* mapped in the 0xFF800000-0xFFFFFFFF area, we detect the type
	* and the size of flash using 0xFF800000 as the base address,
	* and then call flash_get_size() again to fill flash_info.
	*/
	size = flash_get_size((vu_char *)CONFIG_SYS_FLASH_PRELIMBASE, &flash_info[0]);
	if (size)
	{
	flash_get_size((vu_char *)(-size), &flash_info[0]);
	}

	#if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_PRELIMBASE)
	/* 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

	#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
	# ifndef CONFIG_ENV_SIZE
	# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
	# endif
	flash_protect(FLAG_PROTECT_SET,
	CONFIG_ENV_ADDR,
	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
	&flash_info[0]);
	#endif

	return (size);
	}

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

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

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

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_STM320DB:
	printf ("M29W320DB (32 Mbit)\n");
	break;
	case FLASH_STM800DB:
	printf ("M29W800DB (8 Mbit, bottom boot block)\n");
	break;
	case FLASH_STM800DT:
	printf ("M29W800DT (8 Mbit, top boot block)\n");
	break;
	default:
	printf ("Unknown Chip Type\n");
	break;
	}

	printf (" Size: %ld KB in %d Sectors\n",
	info->size >> 10, 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");
	return;
	}

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

	static ulong flash_get_size (vu_char addr, flash_info_t info)
	{
	short i;
	uchar vendor, devid;
	ulong base = (ulong)addr;

	/* Write auto select command: read Manufacturer ID */
	addr[0x0AAA] = 0xAA;
	addr[0x0555] = 0x55;
	addr[0x0AAA] = 0x90;

	udelay(1000);

	vendor = addr[0];
	devid = addr[2];

	/* only support STM */
	if ((vendor << 16) != FLASH_MAN_STM) {
	return 0;
	}

	if (devid == FLASH_STM320DB) {
	/* MPC8240 can address maximum 2Mb of flash, that is why the MSB
	* lead is grounded and we can access only 2 first Mb */
	info->flash_id = vendor << 16 \| devid;
	info->sector_count = 32;
	info->size = info->sector_count * 0x10000;
	for (i = 0; i < info->sector_count; i++) {
	info->start[i] = base + i * 0x10000;
	}
	}
	else if (devid == FLASH_STM800DB) {
	info->flash_id = vendor << 16 \| devid;
	info->sector_count = 19;
	info->size = 0x100000;
	info->start[0] = 0x0000;
	info->start[1] = 0x4000;
	info->start[2] = 0x6000;
	info->start[3] = 0x8000;
	for (i = 4; i < info->sector_count; i++) {
	info->start[i] = base + (i-3) * 0x10000;
	}
	}
	else if (devid == FLASH_STM800DT) {
	info->flash_id = vendor << 16 \| devid;
	info->sector_count = 19;
	info->size = 0x100000;
	for (i = 0; i < info->sector_count-4; i++) {
	info->start[i] = base + i * 0x10000;
	}
	info->start[i] = base + i * 0x10000;
	info->start[i+1] = base + i * 0x10000 + 0x8000;
	info->start[i+2] = base + i * 0x10000 + 0xa000;
	info->start[i+3] = base + i * 0x10000 + 0xc000;
	}
	else {
	return 0;
	}

	/* mark all sectors as unprotected */
	for (i = 0; i < info->sector_count; i++) {
	info->protect[i] = 0;
	}

	/* Issue the reset command */
	if (info->flash_id != FLASH_UNKNOWN) {
	addr[0] = 0xF0; /* reset bank */
	}

	return (info->size);
	}


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

	int flash_erase (flash_info_t *info, int s_first, int s_last)
	{
	vu_char addr = (vu_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;
	}

	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[0x0AAA] = 0xAA;
	addr[0x0555] = 0x55;
	addr[0x0AAA] = 0x80;
	addr[0x0AAA] = 0xAA;
	addr[0x0555] = 0x55;

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

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
	if (info->protect[sect] == 0) { /* not protected */
	addr = (vu_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 = (vu_char *)(info->start[l_sect]);
	while ((addr[0] & 0x80) != 0x80) {
	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
	printf ("Timeout\n");
	return 1;
	}
	/* show that we're waiting */
	if ((now - last) > 1000) { /* every second */
	serial_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)
	{
	int rc;

	while (cnt > 0) {
	if ((rc = write_byte(info, addr, *src)) != 0) {
	return (rc);
	}
	addr++;
	src++;
	cnt--;
	}

	return (0);
	}

	/*-----------------------------------------------------------------------
	* Write a byte to Flash, returns:
	* 0 - OK
	* 1 - write timeout
	* 2 - Flash not erased
	*/
	static int write_byte (flash_info_t *info, ulong dest, uchar data)
	{
	vu_char addr = (vu_char )(info->start[0]);
	ulong start;
	int flag;

	/* Check if Flash is (sufficiently) erased */
	if ((((vu_char )dest) & data) != data) {
	return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr[0x0AAA] = 0xAA;
	addr[0x0555] = 0x55;
	addr[0x0AAA] = 0xA0;

	((vu_char )dest) = data;

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

	/* data polling for D7 */
	start = get_timer (0);
	while ((((vu_char )dest) & 0x80) != (data & 0x80)) {
	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
	return (1);
	}
	}
	return (0);
	}

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