/* * (C) Copyright 2001 * 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 <mpc824x.h> #if defined(CFG_ENV_IS_IN_FLASH) # ifndef CFG_ENV_ADDR # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) # endif # ifndef CFG_ENV_SIZE # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE # endif # ifndef CFG_ENV_SECT_SIZE # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE # endif #endif /*---------------------------------------------------------------------*/ #define DEBUG_FLASH #ifdef DEBUG_FLASH #define DEBUGF(fmt,args...) printf(fmt ,##args) #else #define DEBUGF(fmt,args...) #endif /*---------------------------------------------------------------------*/ flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ /*----------------------------------------------------------------------- * Functions */ static ulong flash_get_size (vu_char *addr, flash_info_t *info); static int write_data (flash_info_t *info, uchar *dest, uchar data); static void flash_get_offsets (ulong base, flash_info_t *info); #define BS(b) (b) #define BYTEME(x) ((x) & 0xFF) /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { unsigned long flash_banks[CFG_MAX_FLASH_BANKS] = CFG_FLASH_BANKS; unsigned long size, size_b[CFG_MAX_FLASH_BANKS]; int i; /* Init: no FLASHes known */ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]); /* size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]); */ size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]); if (flash_info[i].flash_id == FLASH_UNKNOWN) { printf ("## Unknown FLASH on Bank %d: " "ID 0x%lx, Size = 0x%08lx = %ld MB\n", i, flash_info[i].flash_id, size_b[i], size_b[i]<<20); } else { DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n", i, flash_banks[i], size_b[i]); flash_get_offsets (flash_banks[i], &flash_info[i]); flash_info[i].size = size_b[i]; } } #if CFG_MONITOR_BASE >= CFG_FLASH_BASE DEBUGF("protect monitor %x @ %x\n", CFG_MONITOR_BASE, CFG_MONITOR_LEN); /* monitor protection ON by default */ flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, &flash_info[0]); #endif #ifdef CFG_ENV_IS_IN_FLASH /* ENV protection ON by default */ DEBUGF("protect environtment %x @ %x\n", CFG_ENV_ADDR, CFG_ENV_SECT_SIZE); flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, &flash_info[0]); #endif size = 0; DEBUGF("## Final Flash bank sizes: "); for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { DEBUGF("%08lx ", size_b[i]); size += size_b[i]; } DEBUGF("\n"); return (size); } /*----------------------------------------------------------------------- */ static void flash_get_offsets (ulong base, flash_info_t *info) { int i; if (info->flash_id == FLASH_UNKNOWN) { return; } switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_INTEL: for (i = 0; i < info->sector_count; i++) { info->start[i] = base; base += 0x00020000; /* 128k per bank */ } return; default: printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id); return; } } /*----------------------------------------------------------------------- */ 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_SST: printf ("SST "); break; case FLASH_MAN_STM: printf ("STM "); break; case FLASH_MAN_INTEL: printf ("Intel "); break; case FLASH_MAN_MT: printf ("MT "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_28F320J3A: printf ("28F320J3A (32Mbit = 128K x 32)\n"); break; case FLASH_28F640J3A: printf ("28F640J3A (64Mbit = 128K x 64)\n"); break; case FLASH_28F128J3A: printf ("28F128J3A (128Mbit = 128K x 128)\n"); break; default: printf ("Unknown Chip Type\n"); break; } #if 1 if (info->size >= (1 << 20)) { i = 20; } else { i = 10; } printf (" Size: %ld %cB in %d Sectors\n", info->size >> i, (i == 20) ? 'M' : 'k', 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"); #endif return; } /*----------------------------------------------------------------------- */ /*----------------------------------------------------------------------- */ /* * The following code cannot be run from FLASH! */ static ulong flash_get_size (vu_char *addr, flash_info_t *info) { vu_char manuf, device; addr[0] = BS(0x90); manuf = BS(addr[0]); DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf); switch (manuf) { case BYTEME(AMD_MANUFACT): info->flash_id = FLASH_MAN_AMD; break; case BYTEME(FUJ_MANUFACT): info->flash_id = FLASH_MAN_FUJ; break; case BYTEME(SST_MANUFACT): info->flash_id = FLASH_MAN_SST; break; case BYTEME(STM_MANUFACT): info->flash_id = FLASH_MAN_STM; break; case BYTEME(INTEL_MANUFACT): info->flash_id = FLASH_MAN_INTEL; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; addr[0] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */ return 0; /* no or unknown flash */ } device = BS(addr[2]); /* device ID */ DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", (ulong)(&addr[1]), device); switch (device) { case BYTEME(INTEL_ID_28F320J3A): info->flash_id += FLASH_28F320J3A; info->sector_count = 32; info->size = 0x00400000; break; /* => 4 MB */ case BYTEME(INTEL_ID_28F640J3A): info->flash_id += FLASH_28F640J3A; info->sector_count = 64; info->size = 0x00800000; break; /* => 8 MB */ case BYTEME(INTEL_ID_28F128J3A): info->flash_id += FLASH_28F128J3A; info->sector_count = 128; info->size = 0x01000000; break; /* => 16 MB */ default: info->flash_id = FLASH_UNKNOWN; addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */ return 0; /* => no or unknown flash */ } if (info->sector_count > CFG_MAX_FLASH_SECT) { printf ("** ERROR: sector count %d > max (%d) **\n", info->sector_count, CFG_MAX_FLASH_SECT); info->sector_count = CFG_MAX_FLASH_SECT; } addr[0] = BS(0xFF); /* restore read mode */ return (info->size); } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { int flag, prot, 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_VENDMASK) != FLASH_MAN_INTEL) { printf ("Can erase only Intel flash types - 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"); } start = get_timer (0); last = start; /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ vu_char *addr = (vu_char *)(info->start[sect]); unsigned long status; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); *addr = BS(0x50); /* clear status register */ *addr = BS(0x20); /* erase setup */ *addr = BS(0xD0); /* erase confirm */ /* re-enable interrupts if necessary */ if (flag) { enable_interrupts(); } /* wait at least 80us - let's wait 1 ms */ udelay (1000); while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) { if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { printf ("Timeout\n"); *addr = BS(0xB0); /* suspend erase */ *addr = BS(0xFF); /* reset to read mode */ return 1; } /* show that we're waiting */ if ((now - last) > 1000) { /* every second */ putc ('.'); last = now; } } *addr = BS(0xFF); /* reset to read mode */ } } printf (" done\n"); return 0; } /*----------------------------------------------------------------------- * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased * 4 - Flash not identified */ #define FLASH_WIDTH 1 /* flash bus width in bytes */ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) { uchar *wp = (uchar *)addr; int rc; if (info->flash_id == FLASH_UNKNOWN) { return 4; } while (cnt > 0) { if ((rc = write_data(info, wp, *src)) != 0) { return rc; } wp++; src++; cnt--; } return cnt; } /*----------------------------------------------------------------------- * Write a word to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_data (flash_info_t *info, uchar *dest, uchar data) { vu_char *addr = (vu_char *)dest; ulong status; ulong start; int flag; /* Check if Flash is (sufficiently) erased */ if ((BS(*addr) & data) != data) { return 2; } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); *addr = BS(0x40); /* write setup */ *addr = data; /* re-enable interrupts if necessary */ if (flag) { enable_interrupts(); } start = get_timer (0); while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) { if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { *addr = BS(0xFF); /* restore read mode */ return 1; } } *addr = BS(0xFF); /* restore read mode */ return 0; } /*----------------------------------------------------------------------- */