/* * (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[CFG_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 *)CFG_IMMR;  volatile memctl8xx_t *memctl = &immap->im_memctl;  unsigned long size;  int i;  /* Init: no FLASHes known */  for (i=0; i<CFG_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 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);  memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;  /* Re-do sizing to get full correct info */  size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);  flash_get_offsets (CFG_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)) > CFG_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) > CFG_FLASH_WRITE_TOUT) {      return (1);    }  }  return (0);}/*----------------------------------------------------------------------- */