[people/ms/u-boot.git] / board / siemens / IAD210 / flash.c

/*
 * (C) Copyright 2000, 2001, 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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_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)
{
  volatile immap_t     *immap  = (immap_t *)CONFIG_SYS_IMMR;
  volatile memctl8xx_t *memctl = &immap->im_memctl;
  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;
  }

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

  size = flash_get_size((vu_long *)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, size<<20);
  }


  /* Remap FLASH according to real size */
  memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
  memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;

  /* Re-do sizing to get full correct info */
  size = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);

  flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);

  flash_info[0].size = size;

  return (size);
}

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

  /* set up sector start address table */
  if (info->flash_id & FLASH_BTYPE) {
    /* set sector offsets for bottom boot block type	*/
    info->start[0] = base + 0x00000000;
    info->start[1] = base + 0x00008000;
    info->start[2] = base + 0x0000C000;
    info->start[3] = base + 0x00010000;
    for (i = 4; i < info->sector_count; i++) {
      info->start[i] = base + (i * 0x00020000) - 0x00060000;
    }
  } else {
    /* set sector offsets for top boot block type		*/
    i = info->sector_count - 1;
    info->start[i--] = base + info->size - 0x00008000;
    info->start[i--] = base + info->size - 0x0000C000;
    info->start[i--] = base + info->size - 0x00010000;
    for (; i >= 0; i--) {
      info->start[i] = base + i * 0x00020000;
    }
  }

}

/*-----------------------------------------------------------------------
 */
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;
  default:		printf ("Unknown Vendor ");	break;
  }

  switch (info->flash_id & FLASH_TYPEMASK) {
  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;
  }

  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");
}

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


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

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

static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
  short i;
  ulong value;
  ulong base = (ulong)addr;


  /* Write auto select command: read Manufacturer ID */
  addr[0x0555] = 0x00AA00AA;
  addr[0x02AA] = 0x00550055;
  addr[0x0555] = 0x00900090;

  value = addr[0];

  switch (value) {
  case AMD_MANUFACT:
    info->flash_id = FLASH_MAN_AMD;
    break;
  case FUJ_MANUFACT:
    info->flash_id = FLASH_MAN_FUJ;
    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 AMD_ID_LV400T:
    info->flash_id += FLASH_AM400T;
    info->sector_count = 11;
    info->size = 0x00100000;
    break;				/* => 1 MB		*/

  case AMD_ID_LV400B:
    info->flash_id += FLASH_AM400B;
    info->sector_count = 11;
    info->size = 0x00100000;
    break;				/* => 1 MB		*/

  case AMD_ID_LV800T:
    info->flash_id += FLASH_AM800T;
    info->sector_count = 19;
    info->size = 0x00200000;
    break;				/* => 2 MB		*/

  case AMD_ID_LV800B:
    info->flash_id += FLASH_AM800B;
    info->sector_count = 19;
    info->size = 0x00200000;
    break;				/* => 2 MB		*/

  case AMD_ID_LV160T:
    info->flash_id += FLASH_AM160T;
    info->sector_count = 35;
    info->size = 0x00400000;
    break;				/* => 4 MB		*/

  case AMD_ID_LV160B:
    info->flash_id += FLASH_AM160B;
    info->sector_count = 35;
    info->size = 0x00400000;
    break;				/* => 4 MB		*/
#if 0	/* enable when device IDs are available */
  case AMD_ID_LV320T:
    info->flash_id += FLASH_AM320T;
    info->sector_count = 67;
    info->size = 0x00800000;
    break;				/* => 8 MB		*/

  case AMD_ID_LV320B:
    info->flash_id += FLASH_AM320B;
    info->sector_count = 67;
    info->size = 0x00800000;
    break;				/* => 8 MB		*/
#endif
  default:
    info->flash_id = FLASH_UNKNOWN;
    return (0);			/* => no or unknown flash */

  }

  /* set up sector start address table */
  if (info->flash_id & FLASH_BTYPE) {
    /* set sector offsets for bottom boot block type	*/
    info->start[0] = base + 0x00000000;
    info->start[1] = base + 0x00008000;
    info->start[2] = base + 0x0000C000;
    info->start[3] = base + 0x00010000;
    for (i = 4; i < info->sector_count; i++) {
      info->start[i] = base + (i * 0x00020000) - 0x00060000;
    }
  } else {
    /* set sector offsets for top boot block type		*/
    i = info->sector_count - 1;
    info->start[i--] = base + info->size - 0x00008000;
    info->start[i--] = base + info->size - 0x0000C000;
    info->start[i--] = base + info->size - 0x00010000;
    for (; i >= 0; i--) {
      info->start[i] = base + i * 0x00020000;
    }
  }

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

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

    *addr = 0x00F000F0;	/* reset bank */
  }

  return (info->size);
}


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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
  vu_long *addr = (vu_long*)(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] = 0x00AA00AA;
  addr[0x02AA] = 0x00550055;
  addr[0x0555] = 0x00800080;
  addr[0x0555] = 0x00AA00AA;
  addr[0x02AA] = 0x00550055;

  /* Start erase on unprotected sectors */
  for (sect = s_first; sect<=s_last; sect++) {
    if (info->protect[sect] == 0) {	/* not protected */
      addr = (vu_long*)(info->start[sect]);
      addr[0] = 0x00300030;
      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_long*)(info->start[l_sect]);
  while ((addr[0] & 0x00800080) != 0x00800080) {
    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 long *)info->start[0];
  addr[0] = 0x00F000F0;	/* 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
   */
  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);
}

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
affae2bf WD	1	/*
	2	* (C) Copyright 2000, 2001, 2002
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <mpc8xx.h>
	26
6d0f6bcf	27	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
affae2bf WD	28
	29	/*-----------------------------------------------------------------------
	30	* Functions
	31	*/
	32	static ulong flash_get_size (vu_long addr, flash_info_t info);
	33	static int write_word (flash_info_t *info, ulong dest, ulong data);
	34	static void flash_get_offsets (ulong base, flash_info_t *info);
	35
	36	/*-----------------------------------------------------------------------
	37	*/
	38
	39	unsigned long flash_init (void)
	40	{
6d0f6bcf	41	volatile immap_t immap = (immap_t )CONFIG_SYS_IMMR;
affae2bf WD	42	volatile memctl8xx_t *memctl = &immap->im_memctl;
	43	unsigned long size;
	44	int i;
	45
	46	/* Init: no FLASHes known */
6d0f6bcf	47	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
affae2bf WD	48	flash_info[i].flash_id = FLASH_UNKNOWN;
	49	}
	50
	51	/* Static FLASH Bank configuration here - FIXME XXX */
	52
	53	size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
	54
	55	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	56	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	57	size, size<<20);
	58	}
	59
	60
	61	/* Remap FLASH according to real size */
6d0f6bcf JCPV	62	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH \| (-size & 0xFFFF8000);
6d0f6bcf JCPV	63	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) \| BR_MS_GPCM \| BR_V;
affae2bf WD	64
affae2bf WD	65	/* Re-do sizing to get full correct info */
6d0f6bcf	66	size = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
affae2bf	67
6d0f6bcf	68	flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
affae2bf WD	69
	70	flash_info[0].size = size;
	71
	72	return (size);
	73	}
	74
	75	/*-----------------------------------------------------------------------
	76	*/
	77	static void flash_get_offsets (ulong base, flash_info_t *info)
	78	{
	79	int i;
	80
	81	/* set up sector start address table */
	82	if (info->flash_id & FLASH_BTYPE) {
	83	/* set sector offsets for bottom boot block type */
	84	info->start[0] = base + 0x00000000;
	85	info->start[1] = base + 0x00008000;
	86	info->start[2] = base + 0x0000C000;
	87	info->start[3] = base + 0x00010000;
	88	for (i = 4; i < info->sector_count; i++) {
	89	info->start[i] = base + (i * 0x00020000) - 0x00060000;
	90	}
	91	} else {
	92	/* set sector offsets for top boot block type */
	93	i = info->sector_count - 1;
	94	info->start[i--] = base + info->size - 0x00008000;
	95	info->start[i--] = base + info->size - 0x0000C000;
	96	info->start[i--] = base + info->size - 0x00010000;
	97	for (; i >= 0; i--) {
	98	info->start[i] = base + i * 0x00020000;
	99	}
	100	}
	101
	102	}
	103
	104	/*-----------------------------------------------------------------------
	105	*/
	106	void flash_print_info (flash_info_t *info)
	107	{
	108	int i;
	109
	110	if (info->flash_id == FLASH_UNKNOWN) {
	111	printf ("missing or unknown FLASH type\n");
	112	return;
	113	}
	114
	115	switch (info->flash_id & FLASH_VENDMASK) {
	116	case FLASH_MAN_AMD: printf ("AMD "); break;
	117	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
	118	default: printf ("Unknown Vendor "); break;
	119	}
	120
	121	switch (info->flash_id & FLASH_TYPEMASK) {
	122	case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
	123	break;
	124	case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
	125	break;
	126	case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
	127	break;
	128	case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
	129	break;
	130	case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
	131	break;
	132	case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
133	break;
134	case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
135	break;
136	case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
137	break;
138	default: printf ("Unknown Chip Type\n");
139	break;
140	}
141
142	printf (" Size: %ld MB in %d Sectors\n",
8bde7f77	143	info->size >> 20, info->sector_count);
affae2bf WD	144
	145	printf (" Sector Start Addresses:");
	146	for (i=0; i<info->sector_count; ++i) {
	147	if ((i % 5) == 0)
	148	printf ("\n ");
	149	printf (" %08lX%s",
	150	info->start[i],
	151	info->protect[i] ? " (RO)" : " "
8bde7f77	152	);
affae2bf WD	153	}
	154	printf ("\n");
	155	}
	156
	157	/*-----------------------------------------------------------------------
	158	*/
	159
	160
	161	/*-----------------------------------------------------------------------
	162	*/
	163
	164	/*
	165	* The following code cannot be run from FLASH!
	166	*/
	167
	168	static ulong flash_get_size (vu_long addr, flash_info_t info)
	169	{
	170	short i;
	171	ulong value;
	172	ulong base = (ulong)addr;
	173
	174
	175	/* Write auto select command: read Manufacturer ID */
	176	addr[0x0555] = 0x00AA00AA;
	177	addr[0x02AA] = 0x00550055;
	178	addr[0x0555] = 0x00900090;
	179
	180	value = addr[0];
	181
	182	switch (value) {
	183	case AMD_MANUFACT:
	184	info->flash_id = FLASH_MAN_AMD;
	185	break;
	186	case FUJ_MANUFACT:
	187	info->flash_id = FLASH_MAN_FUJ;
	188	break;
	189	default:
	190	info->flash_id = FLASH_UNKNOWN;
	191	info->sector_count = 0;
	192	info->size = 0;
	193	return (0); /* no or unknown flash */
	194	}
	195
	196	value = addr[1]; /* device ID */
	197
	198	switch (value) {
	199	case AMD_ID_LV400T:
	200	info->flash_id += FLASH_AM400T;
	201	info->sector_count = 11;
	202	info->size = 0x00100000;
	203	break; /* => 1 MB */
	204
	205	case AMD_ID_LV400B:
	206	info->flash_id += FLASH_AM400B;
	207	info->sector_count = 11;
	208	info->size = 0x00100000;
	209	break; /* => 1 MB */
	210
	211	case AMD_ID_LV800T:
	212	info->flash_id += FLASH_AM800T;
	213	info->sector_count = 19;
	214	info->size = 0x00200000;
	215	break; /* => 2 MB */
	216
217	case AMD_ID_LV800B:
218	info->flash_id += FLASH_AM800B;
219	info->sector_count = 19;
220	info->size = 0x00200000;
221	break; /* => 2 MB */
222
223	case AMD_ID_LV160T:
224	info->flash_id += FLASH_AM160T;
225	info->sector_count = 35;
226	info->size = 0x00400000;
227	break; /* => 4 MB */
228
229	case AMD_ID_LV160B:
230	info->flash_id += FLASH_AM160B;
231	info->sector_count = 35;
232	info->size = 0x00400000;
233	break; /* => 4 MB */
234	#if 0 /* enable when device IDs are available */
235	case AMD_ID_LV320T:
236	info->flash_id += FLASH_AM320T;
237	info->sector_count = 67;
238	info->size = 0x00800000;
239	break; /* => 8 MB */
240
241	case AMD_ID_LV320B:
242	info->flash_id += FLASH_AM320B;
243	info->sector_count = 67;
244	info->size = 0x00800000;
245	break; /* => 8 MB */
246	#endif
247	default:
248	info->flash_id = FLASH_UNKNOWN;
249	return (0); /* => no or unknown flash */
250
251	}
252
253	/* set up sector start address table */
254	if (info->flash_id & FLASH_BTYPE) {
255	/* set sector offsets for bottom boot block type */
256	info->start[0] = base + 0x00000000;
257	info->start[1] = base + 0x00008000;
258	info->start[2] = base + 0x0000C000;
259	info->start[3] = base + 0x00010000;
260	for (i = 4; i < info->sector_count; i++) {
261	info->start[i] = base + (i * 0x00020000) - 0x00060000;
262	}
263	} else {
264	/* set sector offsets for top boot block type */
265	i = info->sector_count - 1;
266	info->start[i--] = base + info->size - 0x00008000;
267	info->start[i--] = base + info->size - 0x0000C000;
268	info->start[i--] = base + info->size - 0x00010000;
269	for (; i >= 0; i--) {
270	info->start[i] = base + i * 0x00020000;
271	}
272	}
273
274	/* check for protected sectors */
275	for (i = 0; i < info->sector_count; i++) {
276	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
277	/* D0 = 1 if protected */
278	addr = (volatile unsigned long *)(info->start[i]);
279	info->protect[i] = addr[2] & 1;
280	}
281
282	/*
283	* Prevent writes to uninitialized FLASH.
284	*/
285	if (info->flash_id != FLASH_UNKNOWN) {
286	addr = (volatile unsigned long *)info->start[0];
287
288	addr = 0x00F000F0; / reset bank */
289	}
290
291	return (info->size);
292	}
293
294
295	/*-----------------------------------------------------------------------
296	*/
297
298	int flash_erase (flash_info_t *info, int s_first, int s_last)
299	{
300	vu_long addr = (vu_long)(info->start[0]);
301	int flag, prot, sect, l_sect;
302	ulong start, now, last;
303
304	if ((s_first < 0) \|\| (s_first > s_last)) {
305	if (info->flash_id == FLASH_UNKNOWN) {
306	printf ("- missing\n");
307	} else {
308	printf ("- no sectors to erase\n");
309	}
310	return 1;
311	}
312
313	if ((info->flash_id == FLASH_UNKNOWN) \|\|
314	(info->flash_id > FLASH_AMD_COMP)) {
315	printf ("Can't erase unknown flash type %08lx - aborted\n",
316	info->flash_id);
317	return 1;
318	}
319
320	prot = 0;
321	for (sect=s_first; sect<=s_last; ++sect) {
322	if (info->protect[sect]) {
323	prot++;
324	}
325	}
326
327	if (prot) {
328	printf ("- Warning: %d protected sectors will not be erased!\n",
329	prot);
330	} else {
331	printf ("\n");
332	}
333
334	l_sect = -1;
335
336	/* Disable interrupts which might cause a timeout here */
337	flag = disable_interrupts();
338
339	addr[0x0555] = 0x00AA00AA;
340	addr[0x02AA] = 0x00550055;
341	addr[0x0555] = 0x00800080;
342	addr[0x0555] = 0x00AA00AA;
343	addr[0x02AA] = 0x00550055;
344
345	/* Start erase on unprotected sectors */
346	for (sect = s_first; sect<=s_last; sect++) {
347	if (info->protect[sect] == 0) { /* not protected */
348	addr = (vu_long*)(info->start[sect]);
349	addr[0] = 0x00300030;
350	l_sect = sect;
351	}
352	}
353
354	/* re-enable interrupts if necessary */
355	if (flag)
356	enable_interrupts();
357
358	/* wait at least 80us - let's wait 1 ms */
359	udelay (1000);
360
361	/*
362	* We wait for the last triggered sector
363	*/
364	if (l_sect < 0)
365	goto DONE;
366
367	start = get_timer (0);
368	last = start;
369	addr = (vu_long*)(info->start[l_sect]);
370	while ((addr[0] & 0x00800080) != 0x00800080) {
6d0f6bcf	371	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
affae2bf WD	372	printf ("Timeout\n");
	373	return 1;
	374	}
	375	/* show that we're waiting */
	376	if ((now - last) > 1000) { /* every second */
	377	putc ('.');
	378	last = now;
	379	}
	380	}
	381
	382	DONE:
	383	/* reset to read mode */
	384	addr = (volatile unsigned long *)info->start[0];
	385	addr[0] = 0x00F000F0; /* reset bank */
	386
	387	printf (" done\n");
	388	return 0;
	389	}
	390
	391	/*-----------------------------------------------------------------------
	392	* Copy memory to flash, returns:
	393	* 0 - OK
	394	* 1 - write timeout
	395	* 2 - Flash not erased
	396	*/
	397
	398	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	399	{
	400	ulong cp, wp, data;
	401	int i, l, rc;
	402
	403	wp = (addr & ~3); /* get lower word aligned address */
	404
	405	/*
	406	* handle unaligned start bytes
	407	*/
	408	if ((l = addr - wp) != 0) {
	409	data = 0;
	410	for (i=0, cp=wp; i<l; ++i, ++cp) {
	411	data = (data << 8) \| ((uchar )cp);
	412	}
	413	for (; i<4 && cnt>0; ++i) {
	414	data = (data << 8) \| *src++;
	415	--cnt;
	416	++cp;
	417	}
	418	for (; cnt==0 && i<4; ++i, ++cp) {
	419	data = (data << 8) \| ((uchar )cp);
	420	}
	421
	422	if ((rc = write_word(info, wp, data)) != 0) {
	423	return (rc);
	424	}
	425	wp += 4;
	426	}
	427
	428	/*
	429	* handle word aligned part
	430	*/
	431	while (cnt >= 4) {
	432	data = 0;
	433	for (i=0; i<4; ++i) {
	434	data = (data << 8) \| *src++;
	435	}
436	if ((rc = write_word(info, wp, data)) != 0) {
437	return (rc);
438	}
439	wp += 4;
440	cnt -= 4;
441	}
442
443	if (cnt == 0) {
444	return (0);
445	}
446
447	/*
448	* handle unaligned tail bytes
449	*/
450	data = 0;
451	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
452	data = (data << 8) \| *src++;
453	--cnt;
454	}
455	for (; i<4; ++i, ++cp) {
456	data = (data << 8) \| ((uchar )cp);
457	}
458
459	return (write_word(info, wp, data));
460	}
461
462	/*-----------------------------------------------------------------------
463	* Write a word to Flash, returns:
464	* 0 - OK
465	* 1 - write timeout
466	* 2 - Flash not erased
467	*/
468	static int write_word (flash_info_t *info, ulong dest, ulong data)
469	{
470	vu_long addr = (vu_long)(info->start[0]);
471	ulong start;
472	int flag;
473
474	/* Check if Flash is (sufficiently) erased */
475	if ((((vu_long )dest) & data) != data) {
476	return (2);
477	}
478	/* Disable interrupts which might cause a timeout here */
479	flag = disable_interrupts();
480
481	addr[0x0555] = 0x00AA00AA;
482	addr[0x02AA] = 0x00550055;
483	addr[0x0555] = 0x00A000A0;
484
485	((vu_long )dest) = data;
486
487	/* re-enable interrupts if necessary */
488	if (flag)
489	enable_interrupts();
490
491	/* data polling for D7 */
492	start = get_timer (0);
493	while ((((vu_long )dest) & 0x00800080) != (data & 0x00800080)) {
6d0f6bcf	494	if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
affae2bf WD	495	return (1);
	496	}
	497	}
	498	return (0);
	499	}
	500
	501	/*-----------------------------------------------------------------------
	502	*/