/* * (C) Copyright 2000 * 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> /* environment.h defines the various CFG_ENV_... values in terms * of whichever ones are given in the configuration file. */ #include <environment.h> flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ /* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it * has nothing to do with the flash chip being 8-bit or 16-bit. */ #ifdef CONFIG_FLASH_16BIT typedef unsigned short FLASH_PORT_WIDTH; typedef volatile unsigned short FLASH_PORT_WIDTHV; #define FLASH_ID_MASK 0xFFFF #else typedef unsigned long FLASH_PORT_WIDTH; typedef volatile unsigned long FLASH_PORT_WIDTHV; #define FLASH_ID_MASK 0xFFFFFFFF #endif #define FPW FLASH_PORT_WIDTH #define FPWV FLASH_PORT_WIDTHV #define ORMASK(size) ((-size) & OR_AM_MSK) /*----------------------------------------------------------------------- * Functions */ static ulong flash_get_size (FPWV * addr, flash_info_t * info); static void flash_reset (flash_info_t * info); static int write_word_intel (flash_info_t * info, FPWV * dest, FPW data); static int write_word_amd (flash_info_t * info, FPWV * dest, FPW data); static void flash_get_offsets (ulong base, flash_info_t * info); #ifdef CFG_FLASH_PROTECTION static void flash_sync_real_protect (flash_info_t * info); #endif /*----------------------------------------------------------------------- * flash_init() * * sets up flash_info and returns size of FLASH (bytes) */ unsigned long flash_init (void) { unsigned long size_b; int i; /* Init: no FLASHes known */ for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } size_b = flash_get_size ((FPW *) CFG_FLASH_BASE, &flash_info[0]); flash_info[0].size = size_b; if (flash_info[0].flash_id == FLASH_UNKNOWN) { printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx\n", size_b); } /* Do this again (was done already in flast_get_size), just * in case we move it when remap the FLASH. */ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); #ifdef CFG_FLASH_PROTECTION /* read the hardware protection status (if any) into the * protection array in flash_info. */ flash_sync_real_protect (&flash_info[0]); #endif #if CFG_MONITOR_BASE >= CFG_FLASH_BASE /* monitor protection ON by default */ flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]); #endif #ifdef CFG_ENV_ADDR flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); #endif #ifdef CFG_ENV_ADDR_REDUND flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND, CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1, &flash_info[0]); #endif return (size_b); } /*----------------------------------------------------------------------- */ static void flash_reset (flash_info_t * info) { FPWV *base = (FPWV *) (info->start[0]); /* Put FLASH back in read mode */ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) *base = (FPW) 0x00FF00FF; /* Intel Read Mode */ else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) *base = (FPW) 0x00F000F0; /* AMD Read Mode */ } /*----------------------------------------------------------------------- */ static void flash_get_offsets (ulong base, flash_info_t * info) { int i; /* set up sector start address table */ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL && (info->flash_id & FLASH_BTYPE)) { int bootsect_size; /* number of bytes/boot sector */ int sect_size; /* number of bytes/regular sector */ bootsect_size = 0x00002000 * (sizeof (FPW) / 2); sect_size = 0x00010000 * (sizeof (FPW) / 2); /* set sector offsets for bottom boot block type */ for (i = 0; i < 8; ++i) { info->start[i] = base + (i * bootsect_size); } for (i = 8; i < info->sector_count; i++) { info->start[i] = base + ((i - 7) * sect_size); } } else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) { int sect_size; /* number of bytes/sector */ sect_size = 0x00010000 * (sizeof (FPW) / 2); /* set up sector start address table (uniform sector type) */ for (i = 0; i < info->sector_count; i++) info->start[i] = base + (i * sect_size); } else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM800T) { int sect_size; /* number of bytes/sector */ sect_size = 0x00010000 * (sizeof (FPW) / 2); /* set up sector start address table (top boot sector type) */ for (i = 0; i < info->sector_count - 3; i++) info->start[i] = base + (i * sect_size); i = info->sector_count - 1; info->start[i--] = base + (info->size - 0x00004000) * (sizeof (FPW) / 2); info->start[i--] = base + (info->size - 0x00006000) * (sizeof (FPW) / 2); info->start[i--] = base + (info->size - 0x00008000) * (sizeof (FPW) / 2); } } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t * info) { int i; uchar *boottype; uchar *bootletter; char *fmt; uchar botbootletter[] = "B"; uchar topbootletter[] = "T"; uchar botboottype[] = "bottom boot sector"; uchar topboottype[] = "top boot sector"; 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_BM: printf ("BRIGHT MICRO "); 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; default: printf ("Unknown Vendor "); break; } /* check for top or bottom boot, if it applies */ if (info->flash_id & FLASH_BTYPE) { boottype = botboottype; bootletter = botbootletter; } else { boottype = topboottype; bootletter = topbootletter; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM800T: fmt = "29LV800B%s (8 Mbit, %s)\n"; break; case FLASH_AM640U: fmt = "29LV641D (64 Mbit, uniform sectors)\n"; break; case FLASH_28F800C3B: case FLASH_28F800C3T: fmt = "28F800C3%s (8 Mbit, %s)\n"; break; case FLASH_INTEL800B: case FLASH_INTEL800T: fmt = "28F800B3%s (8 Mbit, %s)\n"; break; case FLASH_28F160C3B: case FLASH_28F160C3T: fmt = "28F160C3%s (16 Mbit, %s)\n"; break; case FLASH_INTEL160B: case FLASH_INTEL160T: fmt = "28F160B3%s (16 Mbit, %s)\n"; break; case FLASH_28F320C3B: case FLASH_28F320C3T: fmt = "28F320C3%s (32 Mbit, %s)\n"; break; case FLASH_INTEL320B: case FLASH_INTEL320T: fmt = "28F320B3%s (32 Mbit, %s)\n"; break; case FLASH_28F640C3B: case FLASH_28F640C3T: fmt = "28F640C3%s (64 Mbit, %s)\n"; break; case FLASH_INTEL640B: case FLASH_INTEL640T: fmt = "28F640B3%s (64 Mbit, %s)\n"; break; default: fmt = "Unknown Chip Type\n"; break; } printf (fmt, bootletter, boottype); 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! */ ulong flash_get_size (FPWV * addr, flash_info_t * info) { /* Write auto select command: read Manufacturer ID */ /* Write auto select command sequence and test FLASH answer */ addr[0x0555] = (FPW) 0x00AA00AA; /* for AMD, Intel ignores this */ addr[0x02AA] = (FPW) 0x00550055; /* for AMD, Intel ignores this */ addr[0x0555] = (FPW) 0x00900090; /* selects Intel or AMD */ /* The manufacturer codes are only 1 byte, so just use 1 byte. * This works for any bus width and any FLASH device width. */ switch (addr[0] & 0xff) { case (uchar) AMD_MANUFACT: info->flash_id = FLASH_MAN_AMD; break; case (uchar) INTEL_MANUFACT: info->flash_id = FLASH_MAN_INTEL; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; break; } /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */ if (info->flash_id != FLASH_UNKNOWN) switch (addr[1]) { case (FPW) AMD_ID_LV800T: info->flash_id += FLASH_AM800T; info->sector_count = 19; info->size = 0x00100000 * (sizeof (FPW) / 2); break; /* => 1 or 2 MiB */ case (FPW) AMD_ID_LV640U: /* 29LV640 and 29LV641 have same ID */ info->flash_id += FLASH_AM640U; info->sector_count = 128; info->size = 0x00800000 * (sizeof (FPW) / 2); break; /* => 8 or 16 MB */ case (FPW) INTEL_ID_28F800C3B: info->flash_id += FLASH_28F800C3B; info->sector_count = 23; info->size = 0x00100000 * (sizeof (FPW) / 2); break; /* => 1 or 2 MB */ case (FPW) INTEL_ID_28F800B3B: info->flash_id += FLASH_INTEL800B; info->sector_count = 23; info->size = 0x00100000 * (sizeof (FPW) / 2); break; /* => 1 or 2 MB */ case (FPW) INTEL_ID_28F160C3B: info->flash_id += FLASH_28F160C3B; info->sector_count = 39; info->size = 0x00200000 * (sizeof (FPW) / 2); break; /* => 2 or 4 MB */ case (FPW) INTEL_ID_28F160B3B: info->flash_id += FLASH_INTEL160B; info->sector_count = 39; info->size = 0x00200000 * (sizeof (FPW) / 2); break; /* => 2 or 4 MB */ case (FPW) INTEL_ID_28F320C3B: info->flash_id += FLASH_28F320C3B; info->sector_count = 71; info->size = 0x00400000 * (sizeof (FPW) / 2); break; /* => 4 or 8 MB */ case (FPW) INTEL_ID_28F320B3B: info->flash_id += FLASH_INTEL320B; info->sector_count = 71; info->size = 0x00400000 * (sizeof (FPW) / 2); break; /* => 4 or 8 MB */ case (FPW) INTEL_ID_28F640C3B: info->flash_id += FLASH_28F640C3B; info->sector_count = 135; info->size = 0x00800000 * (sizeof (FPW) / 2); break; /* => 8 or 16 MB */ case (FPW) INTEL_ID_28F640B3B: info->flash_id += FLASH_INTEL640B; info->sector_count = 135; info->size = 0x00800000 * (sizeof (FPW) / 2); break; /* => 8 or 16 MB */ default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; return (0); /* => no or unknown flash */ } flash_get_offsets ((ulong) addr, info); /* Put FLASH back in read mode */ flash_reset (info); return (info->size); } #ifdef CFG_FLASH_PROTECTION /*----------------------------------------------------------------------- */ static void flash_sync_real_protect (flash_info_t * info) { FPWV *addr = (FPWV *) (info->start[0]); FPWV *sect; int i; switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_28F800C3B: case FLASH_28F800C3T: case FLASH_28F160C3B: case FLASH_28F160C3T: case FLASH_28F320C3B: case FLASH_28F320C3T: case FLASH_28F640C3B: case FLASH_28F640C3T: /* check for protected sectors */ *addr = (FPW) 0x00900090; for (i = 0; i < info->sector_count; i++) { /* read sector protection at sector address, (A7 .. A0) = 0x02. * D0 = 1 for each device if protected. * If at least one device is protected the sector is marked * protected, but mixed protected and unprotected devices * within a sector should never happen. */ sect = (FPWV *) (info->start[i]); info->protect[i] = (sect[2] & (FPW) (0x00010001)) ? 1 : 0; } /* Put FLASH back in read mode */ flash_reset (info); break; case FLASH_AM640U: case FLASH_AM800T: default: /* no hardware protect that we support */ break; } } #endif /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { FPWV *addr; int flag, prot, sect; int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL; ulong now, last; int rcode = 0; 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; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_INTEL800B: case FLASH_INTEL160B: case FLASH_INTEL320B: case FLASH_INTEL640B: case FLASH_28F800C3B: case FLASH_28F160C3B: case FLASH_28F320C3B: case FLASH_28F640C3B: case FLASH_AM640U: case FLASH_AM800T: break; case FLASH_UNKNOWN: default: 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"); } reset_timer_masked (); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last && rcode == 0; sect++) { if (info->protect[sect] != 0) /* protected, skip it */ continue; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); reset_timer_masked (); last = 0; addr = (FPWV *) (info->start[sect]); if (intel) { *addr = (FPW) 0x00500050; /* clear status register */ *addr = (FPW) 0x00200020; /* erase setup */ *addr = (FPW) 0x00D000D0; /* erase confirm */ } else { /* must be AMD style if not Intel */ FPWV *base; /* first address in bank */ base = (FPWV *) (info->start[0]); base[0x0555] = (FPW) 0x00AA00AA; /* unlock */ base[0x02AA] = (FPW) 0x00550055; /* unlock */ base[0x0555] = (FPW) 0x00800080; /* erase mode */ base[0x0555] = (FPW) 0x00AA00AA; /* unlock */ base[0x02AA] = (FPW) 0x00550055; /* unlock */ *addr = (FPW) 0x00300030; /* erase sector */ } /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* wait at least 50us for AMD, 80us for Intel. * Let's wait 1 ms. */ udelay (1000); while ((*addr & (FPW) 0x00800080) != (FPW) 0x00800080) { if ((now = get_timer_masked ()) > CFG_FLASH_ERASE_TOUT) { printf ("Timeout\n"); if (intel) { /* suspend erase */ *addr = (FPW) 0x00B000B0; } flash_reset (info); /* reset to read mode */ rcode = 1; /* failed */ break; } /* show that we're waiting */ if ((now - last) > 1 * CFG_HZ) { /* every second */ putc ('.'); last = now; } } flash_reset (info); /* reset to read mode */ } printf (" done\n"); return rcode; } /*----------------------------------------------------------------------- * 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) { FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */ int bytes; /* number of bytes to program in current word */ int left; /* number of bytes left to program */ int i, res; for (left = cnt, res = 0; left > 0 && res == 0; addr += sizeof (data), left -= sizeof (data) - bytes) { bytes = addr & (sizeof (data) - 1); addr &= ~(sizeof (data) - 1); /* combine source and destination data so can program * an entire word of 16 or 32 bits */ #ifdef CFG_LITTLE_ENDIAN for (i = 0; i < sizeof (data); i++) { data >>= 8; if (i < bytes || i - bytes >= left) data += (*((uchar *) addr + i)) << 24; else data += (*src++) << 24; } #else for (i = 0; i < sizeof (data); i++) { data <<= 8; if (i < bytes || i - bytes >= left) data += *((uchar *) addr + i); else data += *src++; } #endif /* write one word to the flash */ switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_AMD: res = write_word_amd (info, (FPWV *) addr, data); break; case FLASH_MAN_INTEL: res = write_word_intel (info, (FPWV *) addr, data); break; default: /* unknown flash type, error! */ printf ("missing or unknown FLASH type\n"); res = 1; /* not really a timeout, but gives error */ break; } } return (res); } /*----------------------------------------------------------------------- * Write a word to Flash for AMD FLASH * A word is 16 or 32 bits, whichever the bus width of the flash bank * (not an individual chip) is. * * returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_word_amd (flash_info_t * info, FPWV * dest, FPW data) { int flag; int res = 0; /* result, assume success */ FPWV *base; /* first address in flash bank */ /* Check if Flash is (sufficiently) erased */ if ((*dest & data) != data) { return (2); } base = (FPWV *) (info->start[0]); /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); base[0x0555] = (FPW) 0x00AA00AA; /* unlock */ base[0x02AA] = (FPW) 0x00550055; /* unlock */ base[0x0555] = (FPW) 0x00A000A0; /* selects program mode */ *dest = data; /* start programming the data */ /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); reset_timer_masked (); /* data polling for D7 */ while (res == 0 && (*dest & (FPW) 0x00800080) != (data & (FPW) 0x00800080)) { if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) { *dest = (FPW) 0x00F000F0; /* reset bank */ res = 1; } } return (res); } /*----------------------------------------------------------------------- * Write a word to Flash for Intel FLASH * A word is 16 or 32 bits, whichever the bus width of the flash bank * (not an individual chip) is. * * returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_word_intel (flash_info_t * info, FPWV * dest, FPW data) { int flag; int res = 0; /* result, assume success */ /* Check if Flash is (sufficiently) erased */ if ((*dest & data) != data) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); *dest = (FPW) 0x00500050; /* clear status register */ *dest = (FPW) 0x00FF00FF; /* make sure in read mode */ *dest = (FPW) 0x00400040; /* program setup */ *dest = data; /* start programming the data */ /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); reset_timer_masked (); while (res == 0 && (*dest & (FPW) 0x00800080) != (FPW) 0x00800080) { if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) { *dest = (FPW) 0x00B000B0; /* Suspend program */ res = 1; } } if (res == 0 && (*dest & (FPW) 0x00100010)) res = 1; /* write failed, time out error is close enough */ *dest = (FPW) 0x00500050; /* clear status register */ *dest = (FPW) 0x00FF00FF; /* make sure in read mode */ return (res); } #ifdef CFG_FLASH_PROTECTION /*----------------------------------------------------------------------- */ int flash_real_protect (flash_info_t * info, long sector, int prot) { int rcode = 0; /* assume success */ FPWV *addr; /* address of sector */ FPW value; addr = (FPWV *) (info->start[sector]); switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_28F800C3B: case FLASH_28F800C3T: case FLASH_28F160C3B: case FLASH_28F160C3T: case FLASH_28F320C3B: case FLASH_28F320C3T: case FLASH_28F640C3B: case FLASH_28F640C3T: flash_reset (info); /* make sure in read mode */ *addr = (FPW) 0x00600060L; /* lock command setup */ if (prot) *addr = (FPW) 0x00010001L; /* lock sector */ else *addr = (FPW) 0x00D000D0L; /* unlock sector */ flash_reset (info); /* reset to read mode */ /* now see if it really is locked/unlocked as requested */ *addr = (FPW) 0x00900090; /* read sector protection at sector address, (A7 .. A0) = 0x02. * D0 = 1 for each device if protected. * If at least one device is protected the sector is marked * protected, but return failure. Mixed protected and * unprotected devices within a sector should never happen. */ value = addr[2] & (FPW) 0x00010001; if (value == 0) info->protect[sector] = 0; else if (value == (FPW) 0x00010001) info->protect[sector] = 1; else { /* error, mixed protected and unprotected */ rcode = 1; info->protect[sector] = 1; } if (info->protect[sector] != prot) rcode = 1; /* failed to protect/unprotect as requested */ /* reload all protection bits from hardware for now */ flash_sync_real_protect (info); break; case FLASH_AM640U: case FLASH_AM800T: default: /* no hardware protect that we support */ info->protect[sector] = prot; break; } return rcode; } #endif