/* * (C) Copyright 2002 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de> * * (C) Copyright 2000-2004 * 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 <linux/byteorder/swab.h> #define SWAP(x) __swab32(x) 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) { int i; ulong size = 0; for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { switch (i) { case 0: flash_get_size ((vu_long *) PHYS_FLASH_1, &flash_info[i]); flash_get_offsets (PHYS_FLASH_1, &flash_info[i]); break; case 1: flash_get_size ((vu_long *) PHYS_FLASH_2, &flash_info[i]); flash_get_offsets (PHYS_FLASH_2, &flash_info[i]); break; default: panic ("configured too many flash banks!\n"); break; } size += flash_info[i].size; } /* Protect monitor and environment sectors */ flash_protect ( FLAG_PROTECT_SET,CONFIG_SYS_FLASH_BASE,CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] ); flash_protect ( FLAG_PROTECT_SET,CONFIG_ENV_ADDR,CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] ); return size; } /*----------------------------------------------------------------------- */ static void flash_get_offsets (ulong base, flash_info_t *info) { int i; if (info->flash_id == FLASH_UNKNOWN) return; if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) { for (i = 0; i < info->sector_count; i++) { info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE); info->protect[i] = 0; } } } /*----------------------------------------------------------------------- */ 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_AMLV640U: printf ("AM29LV640ML (64Mbit, uniform sector size)\n"); break; case FLASH_S29GL064M: printf ("S29GL064M (64Mbit, top boot sector size)\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"); return; } /* * 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]; debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value); switch (value) { case AMD_MANUFACT: debug ("Manufacturer: AMD\n"); info->flash_id = FLASH_MAN_AMD; break; case FUJ_MANUFACT: debug ("Manufacturer: FUJITSU\n"); info->flash_id = FLASH_MAN_FUJ; break; default: debug ("Manufacturer: *** unknown ***\n"); info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; return (0); /* no or unknown flash */ } value = addr[1]; /* device ID */ debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value); switch (value) { case AMD_ID_MIRROR: debug ("Mirror Bit flash: addr[14] = %08lX addr[15] = %08lX\n", addr[14], addr[15]); switch(addr[14]) { case AMD_ID_LV640U_2: if (addr[15] != AMD_ID_LV640U_3) { debug ("Chip: AMLV640U -> unknown\n"); info->flash_id = FLASH_UNKNOWN; } else { debug ("Chip: AMLV640U\n"); info->flash_id += FLASH_AMLV640U; info->sector_count = 128; info->size = 0x01000000; } break; /* => 16 MB */ case AMD_ID_GL064MT_2: if (addr[15] != AMD_ID_GL064MT_3) { debug ("Chip: S29GL064M-R3 -> unknown\n"); info->flash_id = FLASH_UNKNOWN; } else { debug ("Chip: S29GL064M-R3\n"); info->flash_id += FLASH_S29GL064M; info->sector_count = 128; info->size = 0x01000000; } break; /* => 16 MB */ default: debug ("Chip: *** unknown ***\n"); info->flash_id = FLASH_UNKNOWN; break; } break; default: info->flash_id = FLASH_UNKNOWN; return (0); /* => no or unknown flash */ } /* set up sector start address table */ switch (value) { case AMD_ID_MIRROR: switch (info->flash_id & FLASH_TYPEMASK) { /* only known types here - no default */ case FLASH_AMLV128U: case FLASH_AMLV640U: case FLASH_AMLV320U: for (i = 0; i < info->sector_count; i++) { info->start[i] = base; base += 0x20000; } break; case FLASH_AMLV320B: for (i = 0; i < info->sector_count; i++) { info->start[i] = base; /* * The first 8 sectors are 8 kB, * all the other ones are 64 kB */ base += (i < 8) ? 2 * ( 8 << 10) : 2 * (64 << 10); } break; } break; default: return (0); break; } #if 0 /* 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; } #endif /* * 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; debug ("flash_erase: first: %d last: %d\n", s_first, s_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) > 100000) { /* 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, SWAP(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, SWAP(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, SWAP(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); }