/* * (C) Copyright 2001 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. * * (C) Copyright 2002 * 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 <config.h> #include <common.h> #include <flash.h> #include <asm/io.h> /*---------------------------------------------------------------------*/ #undef 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]; static ulong flash_get_size (ulong addr, flash_info_t *info); static int flash_get_offsets (ulong base, flash_info_t *info); static int write_word (flash_info_t *info, ulong dest, ulong data); static void flash_reset (ulong addr); unsigned long flash_init (void) { unsigned int i; unsigned long flash_size = 0; /* Init: no FLASHes known */ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; flash_info[i].sector_count = 0; flash_info[i].size = 0; } DEBUGF("\n## Get flash size @ 0x%08x\n", CFG_FLASH_BASE); flash_size = flash_get_size (CFG_FLASH_BASE, flash_info); DEBUGF("## Flash bank size: %08lx\n", flash_size); if (flash_size) { #if CFG_MONITOR_BASE >= CFG_FLASH_BASE && \ CFG_MONITOR_BASE < CFG_FLASH_BASE + CFG_FLASH_MAX_SIZE /* 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_IS_IN_FLASH /* ENV protection ON by default */ flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1, &flash_info[0]); #endif } else { puts ("Warning: the BOOT Flash is not initialised !"); } return flash_size; } /* * The following code cannot be run from FLASH! */ static ulong flash_get_size (ulong addr, flash_info_t *info) { short i; uchar value; /* Write auto select command: read Manufacturer ID */ out8(addr + 0x0555, 0xAA); iobarrier_rw(); out8(addr + 0x02AA, 0x55); iobarrier_rw(); out8(addr + 0x0555, 0x90); iobarrier_rw(); value = in8(addr); iobarrier_rw(); DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, value); switch (value | (value << 16)) { case AMD_MANUFACT: info->flash_id = FLASH_MAN_AMD; break; case FUJ_MANUFACT: info->flash_id = FLASH_MAN_FUJ; break; case STM_MANUFACT: info->flash_id = FLASH_MAN_STM; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; flash_reset (addr); return 0; } value = in8(addr + 1); /* device ID */ iobarrier_rw(); DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", addr+1, value); switch (value) { case AMD_ID_F040B: DEBUGF("Am29F040B\n"); info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x00080000; break; /* => 512 kB */ case AMD_ID_LV040B: DEBUGF("Am29LV040B\n"); info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x00080000; break; /* => 512 kB */ case AMD_ID_LV400T: DEBUGF("Am29LV400T\n"); info->flash_id += FLASH_AM400T; info->sector_count = 11; info->size = 0x00100000; break; /* => 1 MB */ case AMD_ID_LV400B: DEBUGF("Am29LV400B\n"); info->flash_id += FLASH_AM400B; info->sector_count = 11; info->size = 0x00100000; break; /* => 1 MB */ case AMD_ID_LV800T: DEBUGF("Am29LV800T\n"); info->flash_id += FLASH_AM800T; info->sector_count = 19; info->size = 0x00200000; break; /* => 2 MB */ case AMD_ID_LV800B: DEBUGF("Am29LV400B\n"); info->flash_id += FLASH_AM800B; info->sector_count = 19; info->size = 0x00200000; break; /* => 2 MB */ case AMD_ID_LV160T: DEBUGF("Am29LV160T\n"); info->flash_id += FLASH_AM160T; info->sector_count = 35; info->size = 0x00400000; break; /* => 4 MB */ case AMD_ID_LV160B: DEBUGF("Am29LV160B\n"); info->flash_id += FLASH_AM160B; info->sector_count = 35; info->size = 0x00400000; break; /* => 4 MB */ case AMD_ID_LV320T: DEBUGF("Am29LV320T\n"); info->flash_id += FLASH_AM320T; info->sector_count = 67; info->size = 0x00800000; break; /* => 8 MB */ #if 0 /* Has the same ID as AMD_ID_LV320T, to be fixed */ case AMD_ID_LV320B: DEBUGF("Am29LV320B\n"); info->flash_id += FLASH_AM320B; info->sector_count = 67; info->size = 0x00800000; break; /* => 8 MB */ #endif case AMD_ID_LV033C: DEBUGF("Am29LV033C\n"); info->flash_id += FLASH_AM033C; info->sector_count = 64; info->size = 0x01000000; break; /* => 16Mb */ case STM_ID_F040B: DEBUGF("M29F040B\n"); info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x00080000; break; /* => 512 kB */ default: info->flash_id = FLASH_UNKNOWN; flash_reset (addr); 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; } if (! flash_get_offsets (addr, info)) { flash_reset (addr); return 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 */ value = in8(info->start[i] + 2); iobarrier_rw(); info->protect[i] = (value & 1) != 0; } /* * Reset bank to read mode */ flash_reset (addr); return (info->size); } static int flash_get_offsets (ulong base, flash_info_t *info) { unsigned int i; switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM040: /* set sector offsets for uniform sector type */ for (i = 0; i < info->sector_count; i++) { info->start[i] = base + i * info->size / info->sector_count; } break; default: return 0; } return 1; } int flash_erase (flash_info_t *info, int s_first, int s_last) { volatile ulong addr = info->start[0]; int flag, prot, sect, l_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_UNKNOWN) { 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(); out8(addr + 0x555, 0xAA); iobarrier_rw(); out8(addr + 0x2AA, 0x55); iobarrier_rw(); out8(addr + 0x555, 0x80); iobarrier_rw(); out8(addr + 0x555, 0xAA); iobarrier_rw(); out8(addr + 0x2AA, 0x55); iobarrier_rw(); /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ addr = info->start[sect]; out8(addr, 0x30); iobarrier_rw(); 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 = info->start[l_sect]; DEBUGF ("Start erase timeout: %d\n", CFG_FLASH_ERASE_TOUT); while ((in8(addr) & 0x80) != 0x80) { if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { printf ("Timeout\n"); flash_reset (info->start[0]); return 1; } /* show that we're waiting */ if ((now - last) > 1000) { /* every second */ putc ('.'); last = now; } iobarrier_rw(); } DONE: /* reset to read mode */ flash_reset (info->start[0]); 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 ulong addr = info->start[0]; ulong start; int i; /* Check if Flash is (sufficiently) erased */ if ((in32(dest) & data) != data) { return (2); } /* write each byte out */ for (i = 0; i < 4; i++) { char *data_ch = (char *)&data; int flag = disable_interrupts(); out8(addr + 0x555, 0xAA); iobarrier_rw(); out8(addr + 0x2AA, 0x55); iobarrier_rw(); out8(addr + 0x555, 0xA0); iobarrier_rw(); out8(dest+i, data_ch[i]); iobarrier_rw(); /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); /* data polling for D7 */ start = get_timer (0); while ((in8(dest+i) & 0x80) != (data_ch[i] & 0x80)) { if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { flash_reset (addr); return (1); } iobarrier_rw(); } } flash_reset (addr); return (0); } /* * Reset bank to read mode */ static void flash_reset (ulong addr) { out8(addr, 0xF0); /* reset bank */ iobarrier_rw(); } 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_BM: printf ("BRIGHT MICRO "); break; case FLASH_MAN_STM: printf ("SGS THOMSON "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n"); break; case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); break; case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); break; case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); break; case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); break; case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); break; case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); break; case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); break; case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); break; default: printf ("Unknown Chip Type\n"); break; } if (info->size % 0x100000 == 0) { printf (" Size: %ld MB in %d Sectors\n", info->size / 0x100000, info->sector_count); } else if (info->size % 0x400 == 0) { printf (" Size: %ld KB in %d Sectors\n", info->size / 0x400, info->sector_count); } else { printf (" Size: %ld B in %d Sectors\n", info->size, 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"); }