[J-u-boot.git] / board / LEOX / elpt860 / flash.c

/*
**=====================================================================
**
** Copyright (C) 2000, 2001, 2002, 2003
** The LEOX team <[email protected]>, http://www.leox.org
**
** LEOX.org is about the development of free hardware and software resources
**   for system on chip.
**
** Description: U-Boot port on the LEOX's ELPT860 CPU board
** ~~~~~~~~~~~
**
**=====================================================================
**
** 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
**
**=====================================================================
*/

/*
** Note 1: In this file, you have to provide the following variable:
** ------
**              flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS]
** 'flash_info_t' structure is defined into 'include/flash.h'
** and defined as extern into 'common/cmd_flash.c'
**
** Note 2: In this file, you have to provide the following functions:
** ------
**              unsigned long   flash_init(void)
** called from 'board_init_r()' into 'common/board.c'
**
**              void            flash_print_info(flash_info_t *info)
** called from 'do_flinfo()' into 'common/cmd_flash.c'
**
**              int             flash_erase(flash_info_t *info,
**                                          int           s_first,
**                                          int           s_last)
** called from 'do_flerase()' & 'flash_sect_erase()' into 'common/cmd_flash.c'
**
**              int             write_buff (flash_info_t *info,
**                                          uchar        *src,
**                                          ulong         addr,
**                                          ulong         cnt)
** called from 'flash_write()' into 'common/cmd_flash.c'
*/

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


#ifndef	CONFIG_ENV_ADDR
#  define CONFIG_ENV_ADDR	(CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
#endif

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

/*-----------------------------------------------------------------------
 * Internal Functions
 */
static void   flash_get_offsets (ulong base, flash_info_t *info);
static ulong  flash_get_size (volatile unsigned char *addr, flash_info_t *info);

static int write_word (flash_info_t *info, ulong dest, ulong data);
static int write_byte (flash_info_t *info, ulong dest, uchar data);

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

unsigned long
flash_init (void)
{
  volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  volatile memctl8xx_t *memctl = &immap->im_memctl;
  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;
    }

  /* Static FLASH Bank configuration here - FIXME XXX */

  size_b0 = flash_get_size ((volatile unsigned char *)FLASH_BASE0_PRELIM,
			    &flash_info[0]);

  if ( flash_info[0].flash_id == FLASH_UNKNOWN )
    {
      printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	      size_b0, size_b0<<20);
    }

  /* Remap FLASH according to real size */
  memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK);
  memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_PS_8 | BR_V;

  /* Re-do sizing to get full correct info */
  size_b0 = flash_get_size ((volatile unsigned char *)CONFIG_SYS_FLASH_BASE,
			    &flash_info[0]);

  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

#ifdef	CONFIG_ENV_IS_IN_FLASH
  /* ENV protection ON by default */
  flash_protect(FLAG_PROTECT_SET,
		CONFIG_ENV_ADDR,
		CONFIG_ENV_ADDR + CONFIG_ENV_SIZE-1,
		&flash_info[0]);
#endif

  flash_info[0].size = size_b0;

  return (size_b0);
}

/*-----------------------------------------------------------------------
 */
static void
flash_get_offsets (ulong          base,
		   flash_info_t  *info)
{
  int i;

#define SECTOR_64KB    0x00010000

  /* set up sector start adress table */
  for (i = 0; i < info->sector_count; i++)
    {
      info->start[i] = base + (i * SECTOR_64KB);
    }
}

/*-----------------------------------------------------------------------
 */
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_AMD:	printf ("AMD ");		break;
    case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
    case FLASH_MAN_STM: printf ("STM (Thomson) ");      break;
    default:		printf ("Unknown Vendor ");	break;
    }

  switch ( info->flash_id & FLASH_TYPEMASK )
    {
    case FLASH_AM040:   printf ("AM29F040   (4 Mbits)\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 (volatile unsigned char *addr,
		flash_info_t           *info)
{
  short i;
  uchar value;
  ulong base = (ulong)addr;

  /* Write auto select command: read Manufacturer ID */
  addr[0x0555] = 0xAA;
  addr[0x02AA] = 0x55;
  addr[0x0555] = 0x90;

  value = addr[0];

  switch ( value )
    {
      /*    case AMD_MANUFACT: */
    case 0x01:
      info->flash_id = FLASH_MAN_AMD;
      break;
      /*    case FUJ_MANUFACT: */
    case 0x04:
      info->flash_id = FLASH_MAN_FUJ;
      break;
      /*    case STM_MANUFACT: */
    case 0x20:
      info->flash_id = FLASH_MAN_STM;
      break;

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

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

  switch ( value )
    {
    case STM_ID_F040B:
    case AMD_ID_F040B:
      info->flash_id += FLASH_AM040;    /* 4 Mbits = 512k * 8  */
      info->sector_count = 8;
      info->size = 0x00080000;
      break;

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

  /* set up sector start adress table */
  for (i = 0; i < info->sector_count; i++)
    {
      info->start[i] = base + (i * 0x00010000);
    }

  /* 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 */
      addr = (volatile unsigned char *)(info->start[i]);
      info->protect[i] = addr[2] & 1;
    }

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

      *addr = 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 %08lx - aborted\n",
	      info->flash_id);
      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] & 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 */
	{
	  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;
  uchar bdata;
  int i, l, rc;

  if ( (info->flash_id & FLASH_TYPEMASK) == FLASH_AM040 )
    {
      /* Width of the data bus: 8 bits */

      wp = addr;

      while ( cnt )
	{
	  bdata = *src++;

	  if ( (rc = write_byte(info, wp, bdata)) != 0 )
	    {
	      return (rc);
	    }

	  ++wp;
	  --cnt;
	}

      return ( 0 );
    }
  else
    {
      /* Width of the data bus: 32 bits */

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

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

      /*
       * handle word aligned part
       */
      while ( cnt >= 4 )
	{
	  data = 0;
	  for (i=0; i<4; ++i)
	    {
	      data = (data << 8) | *src++;
	    }
	  if ( (rc = write_word(info, wp, data)) != 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)
{
  vu_long *addr = (vu_long*)(info->start[0]);
  ulong start;
  int flag;

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

  addr[0x0555] = 0x00AA00AA;
  addr[0x02AA] = 0x00550055;
  addr[0x0555] = 0x00A000A0;

  *((vu_long *)dest) = data;

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

  /* data polling for D7 */
  start = get_timer (0);
  while ( (*((vu_long *)dest) & 0x00800080) != (data & 0x00800080) )
    {
      if ( get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT )
	{
	  return (1);
	}
    }

  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)
{
  volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]);
  ulong  start;
  int    flag;

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

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

  *((volatile unsigned char *)dest) = data;

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

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

  return (0);
}

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
3bac3513 WD	1	/*
	2	**=====================================================================
	3	**
	4	** Copyright (C) 2000, 2001, 2002, 2003
	5	** The LEOX team <[email protected]>, http://www.leox.org
	6	**
	7	** LEOX.org is about the development of free hardware and software resources
	8	** for system on chip.
	9	**
	10	** Description: U-Boot port on the LEOX's ELPT860 CPU board
	11	** ~~~~~~~~~~~
	12	**
	13	**=====================================================================
	14	**
	15	** This program is free software; you can redistribute it and/or
	16	** modify it under the terms of the GNU General Public License as
	17	** published by the Free Software Foundation; either version 2 of
	18	** the License, or (at your option) any later version.
	19	**
	20	** This program is distributed in the hope that it will be useful,
	21	** but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	** GNU General Public License for more details.
	24	**
	25	** You should have received a copy of the GNU General Public License
	26	** along with this program; if not, write to the Free Software
	27	** Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	28	** MA 02111-1307 USA
	29	**
	30	**=====================================================================
	31	*/
	32
	33	/*
	34	** Note 1: In this file, you have to provide the following variable:
	35	** ------
6d0f6bcf	36	** flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]
3bac3513 WD	37	** 'flash_info_t' structure is defined into 'include/flash.h'
	38	** and defined as extern into 'common/cmd_flash.c'
	39	**
	40	** Note 2: In this file, you have to provide the following functions:
	41	** ------
	42	** unsigned long flash_init(void)
	43	** called from 'board_init_r()' into 'common/board.c'
	44	**
	45	** void flash_print_info(flash_info_t *info)
	46	** called from 'do_flinfo()' into 'common/cmd_flash.c'
	47	**
	48	** int flash_erase(flash_info_t *info,
	49	** int s_first,
	50	** int s_last)
	51	** called from 'do_flerase()' & 'flash_sect_erase()' into 'common/cmd_flash.c'
	52	**
	53	** int write_buff (flash_info_t *info,
	54	** uchar *src,
	55	** ulong addr,
	56	** ulong cnt)
	57	** called from 'flash_write()' into 'common/cmd_flash.c'
	58	*/
	59
	60	#include <common.h>
	61	#include <mpc8xx.h>
	62
	63
0e8d1586	64	#ifndef CONFIG_ENV_ADDR
6d0f6bcf	65	# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
3bac3513 WD	66	#endif
3bac3513 WD	67
6d0f6bcf	68	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
3bac3513 WD	69
	70	/*-----------------------------------------------------------------------
	71	* Internal Functions
	72	*/
	73	static void flash_get_offsets (ulong base, flash_info_t *info);
	74	static ulong flash_get_size (volatile unsigned char addr, flash_info_t info);
	75
	76	static int write_word (flash_info_t *info, ulong dest, ulong data);
	77	static int write_byte (flash_info_t *info, ulong dest, uchar data);
	78
	79	/*-----------------------------------------------------------------------
	80	*/
	81
8bde7f77	82	unsigned long
3bac3513 WD	83	flash_init (void)
3bac3513 WD	84	{
6d0f6bcf	85	volatile immap_t immap = (immap_t )CONFIG_SYS_IMMR;
3bac3513 WD	86	volatile memctl8xx_t *memctl = &immap->im_memctl;
	87	unsigned long size_b0;
	88	int i;
8bde7f77	89
3bac3513	90	/* Init: no FLASHes known */
6d0f6bcf	91	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
3bac3513 WD	92	{
	93	flash_info[i].flash_id = FLASH_UNKNOWN;
	94	}
8bde7f77	95
3bac3513	96	/* Static FLASH Bank configuration here - FIXME XXX */
8bde7f77 WD	97
8bde7f77 WD	98	size_b0 = flash_get_size ((volatile unsigned char *)FLASH_BASE0_PRELIM,
3bac3513	99	&flash_info[0]);
8bde7f77 WD	100
8bde7f77 WD	101	if ( flash_info[0].flash_id == FLASH_UNKNOWN )
3bac3513 WD	102	{
	103	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	104	size_b0, size_b0<<20);
	105	}
8bde7f77	106
3bac3513	107	/* Remap FLASH according to real size */
6d0f6bcf JCPV	108	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH \| (-size_b0 & OR_AM_MSK);
6d0f6bcf JCPV	109	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) \| BR_MS_GPCM \| BR_PS_8 \| BR_V;
8bde7f77	110
3bac3513	111	/* Re-do sizing to get full correct info */
6d0f6bcf	112	size_b0 = flash_get_size ((volatile unsigned char *)CONFIG_SYS_FLASH_BASE,
3bac3513	113	&flash_info[0]);
8bde7f77	114
6d0f6bcf	115	flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
8bde7f77	116
6d0f6bcf	117	#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
3bac3513 WD	118	/* monitor protection ON by default */
3bac3513 WD	119	flash_protect (FLAG_PROTECT_SET,
6d0f6bcf JCPV	120	CONFIG_SYS_MONITOR_BASE,
6d0f6bcf JCPV	121	CONFIG_SYS_MONITOR_BASE + monitor_flash_len-1,
3bac3513 WD	122	&flash_info[0]);
3bac3513 WD	123	#endif
8bde7f77	124
5a1aceb0	125	#ifdef CONFIG_ENV_IS_IN_FLASH
3bac3513 WD	126	/* ENV protection ON by default */
3bac3513 WD	127	flash_protect(FLAG_PROTECT_SET,
0e8d1586 JCPV	128	CONFIG_ENV_ADDR,
0e8d1586 JCPV	129	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE-1,
3bac3513 WD	130	&flash_info[0]);
	131	#endif
	132
	133	flash_info[0].size = size_b0;
8bde7f77	134
3bac3513 WD	135	return (size_b0);
	136	}
	137
	138	/*-----------------------------------------------------------------------
	139	*/
8bde7f77 WD	140	static void
8bde7f77 WD	141	flash_get_offsets (ulong base,
3bac3513 WD	142	flash_info_t *info)
	143	{
	144	int i;
	145
	146	#define SECTOR_64KB 0x00010000
	147
	148	/* set up sector start adress table */
8bde7f77	149	for (i = 0; i < info->sector_count; i++)
3bac3513 WD	150	{
	151	info->start[i] = base + (i * SECTOR_64KB);
	152	}
	153	}
	154
	155	/*-----------------------------------------------------------------------
	156	*/
8bde7f77	157	void
3bac3513 WD	158	flash_print_info (flash_info_t *info)
	159	{
	160	int i;
8bde7f77 WD	161
8bde7f77 WD	162	if ( info->flash_id == FLASH_UNKNOWN )
3bac3513 WD	163	{
	164	printf ("missing or unknown FLASH type\n");
	165	return;
	166	}
	167
8bde7f77	168	switch ( info->flash_id & FLASH_VENDMASK )
3bac3513 WD	169	{
	170	case FLASH_MAN_AMD: printf ("AMD "); break;
	171	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	172	case FLASH_MAN_STM: printf ("STM (Thomson) "); break;
	173	default: printf ("Unknown Vendor "); break;
	174	}
8bde7f77 WD	175
8bde7f77 WD	176	switch ( info->flash_id & FLASH_TYPEMASK )
3bac3513 WD	177	{
	178	case FLASH_AM040: printf ("AM29F040 (4 Mbits)\n");
	179	break;
	180	default: printf ("Unknown Chip Type\n");
	181	break;
	182	}
8bde7f77 WD	183
8bde7f77 WD	184	printf (" Size: %ld KB in %d Sectors\n",
3bac3513	185	info->size >> 10, info->sector_count);
8bde7f77	186
3bac3513	187	printf (" Sector Start Addresses:");
8bde7f77	188	for (i=0; i<info->sector_count; ++i)
3bac3513 WD	189	{
	190	if ((i % 5) == 0)
	191	printf ("\n ");
	192	printf (" %08lX%s",
	193	info->start[i],
	194	info->protect[i] ? " (RO)" : " "
	195	);
	196	}
	197	printf ("\n");
	198
	199	return;
	200	}
	201
	202	/*-----------------------------------------------------------------------
	203	*/
	204
	205
	206	/*-----------------------------------------------------------------------
	207	*/
	208
	209	/*
	210	* The following code cannot be run from FLASH!
	211	*/
	212
8bde7f77 WD	213	static ulong
	214	flash_get_size (volatile unsigned char *addr,
	215	flash_info_t *info)
3bac3513 WD	216	{
	217	short i;
	218	uchar value;
	219	ulong base = (ulong)addr;
	220
	221	/* Write auto select command: read Manufacturer ID */
	222	addr[0x0555] = 0xAA;
	223	addr[0x02AA] = 0x55;
	224	addr[0x0555] = 0x90;
8bde7f77	225
3bac3513 WD	226	value = addr[0];
3bac3513 WD	227
8bde7f77	228	switch ( value )
3bac3513 WD	229	{
	230	/* case AMD_MANUFACT: */
	231	case 0x01:
	232	info->flash_id = FLASH_MAN_AMD;
	233	break;
	234	/* case FUJ_MANUFACT: */
	235	case 0x04:
	236	info->flash_id = FLASH_MAN_FUJ;
	237	break;
	238	/* case STM_MANUFACT: */
	239	case 0x20:
	240	info->flash_id = FLASH_MAN_STM;
	241	break;
	242
	243	default:
	244	info->flash_id = FLASH_UNKNOWN;
	245	info->sector_count = 0;
	246	info->size = 0;
	247	return (0); /* no or unknown flash */
	248	}
8bde7f77	249
3bac3513	250	value = addr[1]; /* device ID */
8bde7f77 WD	251
8bde7f77 WD	252	switch ( value )
3bac3513 WD	253	{
	254	case STM_ID_F040B:
	255	case AMD_ID_F040B:
	256	info->flash_id += FLASH_AM040; /* 4 Mbits = 512k * 8 */
	257	info->sector_count = 8;
	258	info->size = 0x00080000;
	259	break;
	260
	261	default:
	262	info->flash_id = FLASH_UNKNOWN;
	263	return (0); /* => no or unknown flash */
	264	}
	265
	266	/* set up sector start adress table */
8bde7f77	267	for (i = 0; i < info->sector_count; i++)
3bac3513 WD	268	{
	269	info->start[i] = base + (i * 0x00010000);
	270	}
8bde7f77	271
3bac3513	272	/* check for protected sectors */
8bde7f77	273	for (i = 0; i < info->sector_count; i++)
3bac3513 WD	274	{
	275	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
	276	/* D0 = 1 if protected */
	277	addr = (volatile unsigned char *)(info->start[i]);
	278	info->protect[i] = addr[2] & 1;
	279	}
	280
	281	/*
	282	* Prevent writes to uninitialized FLASH.
	283	*/
8bde7f77	284	if ( info->flash_id != FLASH_UNKNOWN )
3bac3513 WD	285	{
3bac3513 WD	286	addr = (volatile unsigned char *)info->start[0];
8bde7f77	287
3bac3513 WD	288	addr = 0xF0; / reset bank */
3bac3513 WD	289	}
8bde7f77	290
3bac3513 WD	291	return (info->size);
	292	}
	293
	294
	295	/*-----------------------------------------------------------------------
	296	*/
	297
	298	int
8bde7f77 WD	299	flash_erase (flash_info_t *info,
8bde7f77 WD	300	int s_first,
3bac3513 WD	301	int s_last)
	302	{
	303	volatile unsigned char addr = (volatile unsigned char )(info->start[0]);
	304	int flag, prot, sect, l_sect;
	305	ulong start, now, last;
8bde7f77 WD	306
8bde7f77 WD	307	if ( (s_first < 0) \|\| (s_first > s_last) )
3bac3513	308	{
8bde7f77	309	if ( info->flash_id == FLASH_UNKNOWN )
3bac3513 WD	310	{
3bac3513 WD	311	printf ("- missing\n");
8bde7f77 WD	312	}
8bde7f77 WD	313	else
3bac3513 WD	314	{
	315	printf ("- no sectors to erase\n");
	316	}
	317	return ( 1 );
	318	}
	319
	320	if ( (info->flash_id == FLASH_UNKNOWN) \|\|
8bde7f77	321	(info->flash_id > FLASH_AMD_COMP) )
3bac3513 WD	322	{
	323	printf ("Can't erase unknown flash type %08lx - aborted\n",
	324	info->flash_id);
	325	return ( 1 );
	326	}
8bde7f77	327
3bac3513	328	prot = 0;
8bde7f77	329	for (sect=s_first; sect<=s_last; ++sect)
3bac3513	330	{
8bde7f77	331	if ( info->protect[sect] )
3bac3513 WD	332	{
	333	prot++;
	334	}
	335	}
8bde7f77 WD	336
8bde7f77 WD	337	if ( prot )
3bac3513 WD	338	{
3bac3513 WD	339	printf ("- Warning: %d protected sectors will not be erased!\n", prot);
8bde7f77 WD	340	}
8bde7f77 WD	341	else
3bac3513 WD	342	{
	343	printf ("\n");
	344	}
8bde7f77	345
3bac3513	346	l_sect = -1;
8bde7f77	347
3bac3513 WD	348	/* Disable interrupts which might cause a timeout here */
3bac3513 WD	349	flag = disable_interrupts();
8bde7f77	350
3bac3513 WD	351	addr[0x0555] = 0xAA;
	352	addr[0x02AA] = 0x55;
	353	addr[0x0555] = 0x80;
	354	addr[0x0555] = 0xAA;
	355	addr[0x02AA] = 0x55;
8bde7f77	356
3bac3513	357	/* Start erase on unprotected sectors */
8bde7f77	358	for (sect = s_first; sect<=s_last; sect++)
3bac3513 WD	359	{
	360	if (info->protect[sect] == 0) /* not protected */
	361	{
	362	addr = (volatile unsigned char *)(info->start[sect]);
	363	addr[0] = 0x30;
	364	l_sect = sect;
	365	}
	366	}
8bde7f77	367
3bac3513 WD	368	/* re-enable interrupts if necessary */
	369	if ( flag )
	370	enable_interrupts();
8bde7f77	371
3bac3513 WD	372	/* wait at least 80us - let's wait 1 ms */
3bac3513 WD	373	udelay (1000);
8bde7f77	374
3bac3513 WD	375	/*
	376	* We wait for the last triggered sector
	377	*/
	378	if ( l_sect < 0 )
	379	goto DONE;
8bde7f77	380
3bac3513 WD	381	start = get_timer (0);
	382	last = start;
	383	addr = (volatile unsigned char *)(info->start[l_sect]);
8bde7f77	384	while ( (addr[0] & 0x80) != 0x80 )
3bac3513	385	{
6d0f6bcf	386	if ( (now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT )
3bac3513 WD	387	{
	388	printf ("Timeout\n");
	389	return ( 1 );
	390	}
	391	/* show that we're waiting */
	392	if ( (now - last) > 1000 ) /* every second */
	393	{
	394	putc ('.');
	395	last = now;
	396	}
	397	}
8bde7f77	398
3bac3513 WD	399	DONE:
	400	/* reset to read mode */
	401	addr = (volatile unsigned char *)info->start[0];
	402	addr[0] = 0xF0; /* reset bank */
8bde7f77	403
3bac3513	404	printf (" done\n");
8bde7f77	405
3bac3513 WD	406	return ( 0 );
	407	}
	408
	409	/*-----------------------------------------------------------------------
	410	* Copy memory to flash, returns:
	411	* 0 - OK
	412	* 1 - write timeout
	413	* 2 - Flash not erased
	414	*/
	415
8bde7f77 WD	416	int
	417	write_buff (flash_info_t *info,
	418	uchar *src,
	419	ulong addr,
3bac3513 WD	420	ulong cnt)
	421	{
	422	ulong cp, wp, data;
	423	uchar bdata;
	424	int i, l, rc;
	425
	426	if ( (info->flash_id & FLASH_TYPEMASK) == FLASH_AM040 )
	427	{
	428	/* Width of the data bus: 8 bits */
	429
	430	wp = addr;
8bde7f77	431
3bac3513 WD	432	while ( cnt )
	433	{
	434	bdata = *src++;
8bde7f77	435
3bac3513 WD	436	if ( (rc = write_byte(info, wp, bdata)) != 0 )
	437	{
	438	return (rc);
	439	}
8bde7f77	440
3bac3513 WD	441	++wp;
	442	--cnt;
	443	}
	444
	445	return ( 0 );
	446	}
	447	else
	448	{
	449	/* Width of the data bus: 32 bits */
	450
	451	wp = (addr & ~3); /* get lower word aligned address */
8bde7f77	452
3bac3513 WD	453	/*
	454	* handle unaligned start bytes
	455	*/
8bde7f77	456	if ( (l = addr - wp) != 0 )
3bac3513 WD	457	{
3bac3513 WD	458	data = 0;
8bde7f77	459	for (i=0, cp=wp; i<l; ++i, ++cp)
3bac3513 WD	460	{
	461	data = (data << 8) \| ((uchar )cp);
	462	}
8bde7f77	463	for (; i<4 && cnt>0; ++i)
3bac3513 WD	464	{
	465	data = (data << 8) \| *src++;
	466	--cnt;
	467	++cp;
	468	}
8bde7f77	469	for (; cnt==0 && i<4; ++i, ++cp)
3bac3513 WD	470	{
	471	data = (data << 8) \| ((uchar )cp);
	472	}
8bde7f77 WD	473
8bde7f77 WD	474	if ( (rc = write_word(info, wp, data)) != 0 )
3bac3513 WD	475	{
	476	return (rc);
	477	}
	478	wp += 4;
	479	}
8bde7f77	480
3bac3513 WD	481	/*
	482	* handle word aligned part
	483	*/
8bde7f77	484	while ( cnt >= 4 )
3bac3513 WD	485	{
3bac3513 WD	486	data = 0;
8bde7f77	487	for (i=0; i<4; ++i)
3bac3513 WD	488	{
	489	data = (data << 8) \| *src++;
	490	}
8bde7f77	491	if ( (rc = write_word(info, wp, data)) != 0 )
3bac3513 WD	492	{
	493	return (rc);
	494	}
	495	wp += 4;
	496	cnt -= 4;
	497	}
8bde7f77 WD	498
8bde7f77 WD	499	if ( cnt == 0 )
3bac3513 WD	500	{
	501	return (0);
	502	}
8bde7f77	503
3bac3513 WD	504	/*
	505	* handle unaligned tail bytes
	506	*/
	507	data = 0;
8bde7f77	508	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp)
3bac3513 WD	509	{
	510	data = (data << 8) \| *src++;
	511	--cnt;
	512	}
8bde7f77	513	for (; i<4; ++i, ++cp)
3bac3513 WD	514	{
	515	data = (data << 8) \| ((uchar )cp);
	516	}
8bde7f77	517
3bac3513 WD	518	return (write_word(info, wp, data));
	519	}
	520	}
	521
	522	/*-----------------------------------------------------------------------
	523	* Write a word to Flash, returns:
	524	* 0 - OK
	525	* 1 - write timeout
	526	* 2 - Flash not erased
	527	*/
8bde7f77 WD	528	static int
	529	write_word (flash_info_t *info,
	530	ulong dest,
3bac3513 WD	531	ulong data)
	532	{
	533	vu_long addr = (vu_long)(info->start[0]);
	534	ulong start;
	535	int flag;
8bde7f77	536
3bac3513	537	/* Check if Flash is (sufficiently) erased */
8bde7f77	538	if ( (((vu_long )dest) & data) != data )
3bac3513 WD	539	{
	540	return (2);
	541	}
	542	/* Disable interrupts which might cause a timeout here */
	543	flag = disable_interrupts();
8bde7f77	544
3bac3513 WD	545	addr[0x0555] = 0x00AA00AA;
	546	addr[0x02AA] = 0x00550055;
	547	addr[0x0555] = 0x00A000A0;
8bde7f77	548
3bac3513	549	((vu_long )dest) = data;
8bde7f77	550
3bac3513 WD	551	/* re-enable interrupts if necessary */
	552	if ( flag )
	553	enable_interrupts();
	554
	555	/* data polling for D7 */
	556	start = get_timer (0);
8bde7f77	557	while ( (((vu_long )dest) & 0x00800080) != (data & 0x00800080) )
3bac3513	558	{
6d0f6bcf	559	if ( get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT )
3bac3513 WD	560	{
	561	return (1);
	562	}
	563	}
	564
	565	return (0);
	566	}
	567
	568	/*-----------------------------------------------------------------------
	569	* Write a byte to Flash, returns:
	570	* 0 - OK
	571	* 1 - write timeout
	572	* 2 - Flash not erased
	573	*/
8bde7f77 WD	574	static int
	575	write_byte (flash_info_t *info,
	576	ulong dest,
3bac3513 WD	577	uchar data)
	578	{
	579	volatile unsigned char addr = (volatile unsigned char )(info->start[0]);
	580	ulong start;
	581	int flag;
8bde7f77	582
3bac3513	583	/* Check if Flash is (sufficiently) erased */
8bde7f77	584	if ( (((volatile unsigned char )dest) & data) != data )
3bac3513 WD	585	{
	586	return (2);
	587	}
	588	/* Disable interrupts which might cause a timeout here */
	589	flag = disable_interrupts();
8bde7f77	590
3bac3513 WD	591	addr[0x0555] = 0xAA;
	592	addr[0x02AA] = 0x55;
	593	addr[0x0555] = 0xA0;
8bde7f77	594
3bac3513	595	((volatile unsigned char )dest) = data;
8bde7f77	596
3bac3513 WD	597	/* re-enable interrupts if necessary */
	598	if ( flag )
	599	enable_interrupts();
	600
	601	/* data polling for D7 */
	602	start = get_timer (0);
8bde7f77	603	while ( (((volatile unsigned char )dest) & 0x80) != (data & 0x80) )
3bac3513	604	{
6d0f6bcf	605	if ( get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT )
3bac3513 WD	606	{
	607	return (1);
	608	}
	609	}
	610
	611	return (0);
	612	}
	613
	614	/*-----------------------------------------------------------------------
	615	*/