/* * (C) Copyright 2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2002 Jun Gu * Add support for Am29F016D and dynamic switch setting. * * 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 #include #include #undef DEBUG #ifdef DEBUG #define DEBUGF(x...) printf(x) #else #define DEBUGF(x...) #endif /* DEBUG */ #define BOOT_SMALL_FLASH 32 /* 00100000 */ #define FLASH_ONBD_N 2 /* 00000010 */ #define FLASH_SRAM_SEL 1 /* 00000001 */ #define BOOT_SMALL_FLASH_VAL 4 #define FLASH_ONBD_N_VAL 2 #define FLASH_SRAM_SEL_VAL 1 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ static unsigned long flash_addr_table[8][CFG_MAX_FLASH_BANKS] = { {0xFF800000, 0xFF900000, 0xFFC00000}, /* 0:000: configuraton 4 */ {0xFF900000, 0xFF800000, 0xFFC00000}, /* 1:001: configuraton 3 */ {0x00000000, 0x00000000, 0x00000000}, /* 2:010: configuraton 8 */ {0x00000000, 0x00000000, 0x00000000}, /* 3:011: configuraton 7 */ {0xFFE00000, 0xFFF00000, 0xFF800000}, /* 4:100: configuraton 2 */ {0xFFF00000, 0xFFF80000, 0xFF800000}, /* 5:101: configuraton 1 */ {0x00000000, 0x00000000, 0x00000000}, /* 6:110: configuraton 6 */ {0x00000000, 0x00000000, 0x00000000} /* 7:111: configuraton 5 */ }; /*----------------------------------------------------------------------- * 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); #ifdef CONFIG_OCOTEA #define ADDR0 0x5555 #define ADDR1 0x2aaa #define FLASH_WORD_SIZE unsigned char #endif /*----------------------------------------------------------------------- */ unsigned long flash_init(void) { unsigned long total_b = 0; unsigned long size_b[CFG_MAX_FLASH_BANKS]; unsigned char *fpga_base = (unsigned char *) CFG_FPGA_BASE; unsigned char switch_status; unsigned short index = 0; int i; /* read FPGA base register FPGA_REG0 */ switch_status = *fpga_base; /* check the bitmap of switch status */ if (switch_status & BOOT_SMALL_FLASH) { index += BOOT_SMALL_FLASH_VAL; } if (switch_status & FLASH_ONBD_N) { index += FLASH_ONBD_N_VAL; } if (switch_status & FLASH_SRAM_SEL) { index += FLASH_SRAM_SEL_VAL; } DEBUGF("\n"); DEBUGF("FLASH: Index: %d\n", index); /* 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 = -1; flash_info[i].size = 0; /* check whether the address is 0 */ if (flash_addr_table[index][i] == 0) { continue; } /* call flash_get_size() to initialize sector address */ size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i], &flash_info[i]); flash_info[i].size = size_b[i]; if (flash_info[i].flash_id == FLASH_UNKNOWN) { printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n", i, size_b[i], size_b[i] << 20); flash_info[i].sector_count = -1; flash_info[i].size = 0; } total_b += flash_info[i].size; } return total_b; } /*----------------------------------------------------------------------- */ 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; default: printf("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM040: printf("AM29F040 (512 Kbit, uniform sector size)\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; case FLASH_AMDLV033C: printf("AM29LV033C (32 Mbit, top boot sector)\n"); break; case FLASH_SST800A: printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n"); break; case FLASH_SST160A: printf("SST39LF/VF160 (16 Mbit, 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; DEBUGF("FLASH ADDR: %08x\n", (unsigned) addr); /* Write auto select command: read Manufacturer ID */ udelay(10000); addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; udelay(1000); addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; udelay(1000); addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090; udelay(1000); value = addr2[0]; DEBUGF("FLASH MANUFACT: %x\n", value); 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; return (0); /* no or unknown flash */ } value = addr2[1]; /* device ID */ DEBUGF("\nFLASH DEVICEID: %x\n", value); switch (value) { 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) AMD_ID_F040B: info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x0080000; /* => 512 ko */ break; case (FLASH_WORD_SIZE) AMD_ID_LV033C: info->flash_id += FLASH_AMDLV033C; info->sector_count = 64; info->size = 0x00400000; break; /* => 4 MB */ default: info->flash_id = FLASH_UNKNOWN; return (0); /* => no or unknown flash */ } /* set up sector start address table */ if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) || (info->flash_id == FLASH_AM040) || (info->flash_id == FLASH_AMD016)) { for (i = 0; i < info->sector_count; i++) info->start[i] = base + (i * 0x00010000); } else { if (info->flash_id & FLASH_BTYPE) { /* set sector offsets for bottom boot block type */ info->start[0] = base + 0x00000000; info->start[1] = base + 0x00004000; info->start[2] = base + 0x00006000; info->start[3] = base + 0x00008000; for (i = 4; i < info->sector_count; i++) { info->start[i] = base + (i * 0x00010000) - 0x00030000; } } else { /* set sector offsets for top boot block type */ i = info->sector_count - 1; info->start[i--] = base + info->size - 0x00004000; info->start[i--] = base + info->size - 0x00006000; info->start[i--] = base + info->size - 0x00008000; for (; i >= 0; i--) { info->start[i] = base + i * 0x00010000; } } } /* 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; } /* issue bank reset to return to read mode */ addr2[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* * Prevent writes to uninitialized FLASH. */ if (info->flash_id != FLASH_UNKNOWN) { /* ? ? ? */ } 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)) > CFG_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); 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); /* 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) > CFG_FLASH_WRITE_TOUT) { return (1); } } } return (0); }