/* * (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 */ /* * Modified 4/5/2001 * Wait for completion of each sector erase command issued * 4/5/2001 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com */ #include <common.h> #include <ppc4xx.h> #include <asm/processor.h> #if CONFIG_SYS_MAX_FLASH_BANKS != 1 #error "CONFIG_SYS_MAX_FLASH_BANKS must be 1" #endif 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); #define ADDR0 0x5555 #define ADDR1 0x2aaa #define FLASH_WORD_SIZE unsigned char /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { unsigned long size_b0; /* Init: no FLASHes known */ flash_info[0].flash_id = FLASH_UNKNOWN; /* Static FLASH Bank configuration here - FIXME XXX */ size_b0 = 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_b0, size_b0 << 20); } /* Only one bank */ /* Setup offsets */ flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]); /* Monitor protection ON by default */ (void) flash_protect (FLAG_PROTECT_SET, FLASH_BASE0_PRELIM, FLASH_BASE0_PRELIM + monitor_flash_len - 1, &flash_info[0]); flash_info[0].size = size_b0; return size_b0; } /*----------------------------------------------------------------------- */ /* * This implementation assumes that the flash chips are uniform sector * devices. This is true for all likely JSE devices. */ static void flash_get_offsets (ulong base, flash_info_t * info) { unsigned idx; unsigned long sector_size = info->size / info->sector_count; for (idx = 0; idx < info->sector_count; idx += 1) { info->start[idx] = base + (idx * sector_size); } } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t * info) { int i; int k; int size; int erased; volatile unsigned long *flash; 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_SST: printf ("SST "); break; case FLASH_MAN_STM: printf ("ST Micro "); break; default: printf ("Unknown Vendor "); break; } /* (Reduced table of only parts expected in JSE boards.) */ switch (info->flash_id) { case FLASH_MAN_AMD | FLASH_AM040: printf ("AM29F040 (512 Kbit, uniform sector size)\n"); break; case FLASH_MAN_STM | FLASH_AM040: printf ("MM29W040W (512 Kbit, uniform sector size)\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) { /* * Check if whole sector is erased */ if (i != (info->sector_count - 1)) size = info->start[i + 1] - info->start[i]; else size = info->start[0] + info->size - info->start[i]; erased = 1; flash = (volatile unsigned long *) info->start[i]; size = size >> 2; /* divide by 4 for longword access */ for (k = 0; k < size; k++) { if (*flash++ != 0xffffffff) { erased = 0; break; } } if ((i % 5) == 0) printf ("\n "); printf (" %08lX%s%s", info->start[i], erased ? " E" : " ", 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; FLASH_WORD_SIZE value; ulong base = (ulong) addr; volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr; /* Write auto select command: read Manufacturer ID */ addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090; value = addr2[0]; switch (value) { case (FLASH_WORD_SIZE) AMD_MANUFACT: info->flash_id = FLASH_MAN_AMD; break; case (FLASH_WORD_SIZE) FUJ_MANUFACT: info->flash_id = FLASH_MAN_FUJ; break; case (FLASH_WORD_SIZE) SST_MANUFACT: info->flash_id = FLASH_MAN_SST; break; case (FLASH_WORD_SIZE)STM_MANUFACT: info->flash_id = FLASH_MAN_STM; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; printf("Unknown flash manufacturer code: 0x%x\n", value); return (0); /* no or unknown flash */ } value = addr2[1]; /* device ID */ switch (value) { case (FLASH_WORD_SIZE) AMD_ID_F040B: info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x0080000; /* => 512 ko */ break; case (FLASH_WORD_SIZE) AMD_ID_LV040B: info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x0080000; /* => 512 ko */ break; case (FLASH_WORD_SIZE)STM_ID_M29W040B: /* most likele JSE chip */ info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x0080000; /* => 512 ko */ break; default: info->flash_id = FLASH_UNKNOWN; return (0); /* => no or unknown flash */ } /* Calculate the sector offsets (Use JSE Optimized code). */ flash_get_offsets(base, info); /* 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 */ addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]); if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) info->protect[i] = 0; else info->protect[i] = addr2[2] & 1; } /* * Prevent writes to uninitialized FLASH. */ if (info->flash_id != FLASH_UNKNOWN) { addr2 = (FLASH_WORD_SIZE *) info->start[0]; *addr2 = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ } return (info->size); } int wait_for_DQ7 (flash_info_t * info, int sect) { ulong start, now, last; volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[sect]); start = get_timer (0); last = start; while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) != (FLASH_WORD_SIZE) 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; } } return 0; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]); volatile FLASH_WORD_SIZE *addr2; int flag, prot, sect, l_sect; int i; 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) { printf ("Can't erase unknown flash type - aborted\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 (); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ addr2 = (FLASH_WORD_SIZE *) (info->start[sect]); printf ("Erasing sector %p\n", addr2); /* CLH */ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) { addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */ for (i = 0; i < 50; i++) udelay (1000); /* wait 1 ms */ } else { addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */ } l_sect = sect; /* * Wait for each sector to complete, it's more * reliable. According to AMD Spec, you must * issue all erase commands within a specified * timeout. This has been seen to fail, especially * if printf()s are included (for debug)!! */ wait_for_DQ7 (info, sect); } } /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* wait at least 80us - let's wait 1 ms */ udelay (1000); #if 0 /* * We wait for the last triggered sector */ if (l_sect < 0) goto DONE; wait_for_DQ7 (info, l_sect); DONE: #endif /* reset to read mode */ addr = (FLASH_WORD_SIZE *) info->start[0]; addr[0] = (FLASH_WORD_SIZE) 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) { volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]); volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest; volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data; ulong start; int i; /* Check if Flash is (sufficiently) erased */ if ((*((volatile FLASH_WORD_SIZE *) dest) & (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) { return (2); } for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) { int flag; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0; dest2[i] = data2[i]; /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* data polling for D7 */ start = get_timer (0); while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) != (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) { if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { return (1); } } } return (0); }