/* * (C) Copyright 2001, 2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Flash Routines for Intel devices * *-------------------------------------------------------------------- * 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]; /*----------------------------------------------------------------------- */ ulong flash_get_size (volatile unsigned long *baseaddr, flash_info_t * info) { short i; unsigned long flashtest_h, flashtest_l; info->sector_count = info->size = 0; info->flash_id = FLASH_UNKNOWN; /* Write query command sequence and test FLASH answer */ baseaddr[0] = 0x00980098; baseaddr[1] = 0x00980098; flashtest_h = baseaddr[0]; /* manufacturer ID */ flashtest_l = baseaddr[1]; if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT) return (0); /* no or unknown flash */ flashtest_h = baseaddr[2]; /* device ID */ flashtest_l = baseaddr[3]; if (flashtest_h != flashtest_l) return (0); switch (flashtest_h) { case INTEL_ID_28F160C3B: info->flash_id = FLASH_28F160C3B; info->sector_count = 39; info->size = 0x00800000; /* 4 * 2 MB = 8 MB */ break; case INTEL_ID_28F160F3B: info->flash_id = FLASH_28F160F3B; info->sector_count = 39; info->size = 0x00800000; /* 4 * 2 MB = 8 MB */ break; case INTEL_ID_28F640C3B: info->flash_id = FLASH_28F640C3B; info->sector_count = 135; info->size = 0x02000000; /* 16 * 2 MB = 32 MB */ break; default: return (0); /* no or unknown flash */ } info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */ if (info->flash_id & FLASH_BTYPE) { volatile unsigned long *tmp = baseaddr; /* set up sector start adress table (bottom sector type) * AND unlock the sectors (if our chip is 160C3 or 640C3) */ for (i = 0; i < info->sector_count; i++) { if (((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) || ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F640C3B)) { tmp[0] = 0x00600060; tmp[1] = 0x00600060; tmp[0] = 0x00D000D0; tmp[1] = 0x00D000D0; } info->start[i] = (uint) tmp; tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */ } } memset (info->protect, 0, info->sector_count); baseaddr[0] = 0x00FF00FF; baseaddr[1] = 0x00FF00FF; return (info->size); } /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { unsigned long size_b0 = 0; 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 (only one bank) */ size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]); if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) { printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", size_b0, size_b0 >> 20); } /* protect monitor and environment sectors */ #ifndef CONFIG_BOOT_ROM /* If U-Boot is booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE * but we shouldn't protect it. */ # if CFG_MONITOR_BASE >= CFG_FLASH0_BASE flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0] ); # endif #endif /* CONFIG_BOOT_ROM */ #if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) # ifndef CFG_ENV_SIZE # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE # endif flash_protect (FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]); #endif return (size_b0); } /*----------------------------------------------------------------------- */ 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 >> 16) & 0xff) { case 0x89: printf ("INTEL "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_28F160C3B: printf ("28F160C3B (16 M, bottom sector)\n"); break; case FLASH_28F160F3B: printf ("28F160F3B (16 M, bottom sector)\n"); break; case FLASH_28F640C3B: printf ("28F640C3B (64 M, bottom 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"); } /*----------------------------------------------------------------------- */ 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; } 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 erase on unprotected sectors */ for (sect = s_first; sect <= s_last; sect++) { volatile ulong *addr = (volatile unsigned long *) info->start[sect]; start = get_timer (0); last = start; if (info->protect[sect] == 0) { /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); /* Erase the block */ addr[0] = 0x00200020; addr[1] = 0x00200020; addr[0] = 0x00D000D0; addr[1] = 0x00D000D0; /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* wait at least 80us - let's wait 1 ms */ udelay (1000); last = start; while ((addr[0] & 0x00800080) != 0x00800080 || (addr[1] & 0x00800080) != 0x00800080) { if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) { printf ("Timeout (erase suspended!)\n"); /* Suspend erase */ addr[0] = 0x00B000B0; addr[1] = 0x00B000B0; goto DONE; } /* show that we're waiting */ if ((now - last) > 1000) { /* every second */ serial_putc ('.'); last = now; } } if (addr[0] & 0x00220022 || addr[1] & 0x00220022) { printf ("*** ERROR: erase failed!\n"); goto DONE; } } /* Clear status register and reset to read mode */ addr[0] = 0x00500050; addr[1] = 0x00500050; addr[0] = 0x00FF00FF; addr[1] = 0x00FF00FF; } printf (" done\n"); DONE: return 0; } static int write_word (flash_info_t *, volatile unsigned long *, ulong); /*----------------------------------------------------------------------- * 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 v; int i, l, cc = cnt, res = 0; for (v=0; cc > 0; addr += 4, cc -= 4 - l) { l = (addr & 3); addr &= ~3; for (i = 0; i < 4; i++) { v = (v << 8) + (i < l || i - l >= cc ? *((unsigned char *) addr + i) : *src++); } if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0) break; } return (res); } /*----------------------------------------------------------------------- * Write a word to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_word (flash_info_t * info, volatile unsigned long *addr, ulong data) { int flag, res = 0; ulong start; /* Check if Flash is (sufficiently) erased */ if ((*addr & data) != data) return (2); /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); *addr = 0x00400040; *addr = data; /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); start = get_timer (0); while ((*addr & 0x00800080) != 0x00800080) { if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { /* Suspend program */ *addr = 0x00B000B0; res = 1; goto OUT; } } if (*addr & 0x00220022) { printf ("*** ERROR: program failed!\n"); res = 1; } OUT: /* Clear status register and reset to read mode */ *addr = 0x00500050; *addr = 0x00FF00FF; return (res); }