Yinghai Lu | ca78297 | 2007-01-22 20:21:17 +0000 | [diff] [blame] | 1 | /* |
| 2 | * 49lfxxxc.c: driver for SST49LFXXXC flash models. |
| 3 | * |
| 4 | * |
| 5 | * Copyright 2000 Silicon Integrated System Corporation |
| 6 | * Copyright 2005 coresystems GmbH <stepan@openbios.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | * |
| 22 | * |
| 23 | * Reference: |
| 24 | * SST49LFxxxC data sheets |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include <errno.h> |
| 29 | #include <fcntl.h> |
| 30 | #include <sys/mman.h> |
Yinghai Lu | ca78297 | 2007-01-22 20:21:17 +0000 | [diff] [blame] | 31 | #include <unistd.h> |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <stdint.h> |
Adam Kaufman | 064b1f2 | 2007-02-06 19:47:50 +0000 | [diff] [blame] | 35 | |
Yinghai Lu | ca78297 | 2007-01-22 20:21:17 +0000 | [diff] [blame] | 36 | #include "flash.h" |
| 37 | #include "jedec.h" |
| 38 | #include "debug.h" |
| 39 | |
| 40 | #define SECTOR_ERASE 0x30 |
| 41 | #define BLOCK_ERASE 0x20 |
| 42 | #define ERASE 0xD0 |
| 43 | #define AUTO_PGRM 0x10 |
| 44 | #define RESET 0xFF |
| 45 | #define READ_ID 0x90 |
| 46 | #define READ_STATUS 0x70 |
| 47 | #define CLEAR_STATUS 0x50 |
| 48 | |
| 49 | #define STATUS_BPS (1 << 1) |
| 50 | #define STATUS_ESS (1 << 6) |
| 51 | #define STATUS_WSMS (1 << 7) |
| 52 | |
| 53 | |
| 54 | static __inline__ int write_lockbits_49lfxxxc(volatile uint8_t *bios, int size, |
| 55 | unsigned char bits) |
| 56 | { |
| 57 | int i, left = size; |
| 58 | unsigned long address; |
| 59 | |
| 60 | //printf("bios=0x%08lx\n", (unsigned long)bios); |
| 61 | for (i = 0; left > 65536; i++, left -= 65536) { |
| 62 | //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFC00000 - size + (i * 65536) + 2, *(bios + (i * 65536) + 2) ); |
| 63 | *(bios + (i * 65536) + 2) = bits; |
| 64 | } |
| 65 | address = i * 65536; |
| 66 | //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) ); |
| 67 | *(bios + address + 2) = bits; |
| 68 | address += 32768; |
| 69 | //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) ); |
| 70 | *(bios + address + 2) = bits; |
| 71 | address += 8192; |
| 72 | //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) ); |
| 73 | *(bios + address + 2) = bits; |
| 74 | address += 8192; |
| 75 | //printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) ); |
| 76 | *(bios + address + 2) = bits; |
| 77 | |
| 78 | |
| 79 | return (0); |
| 80 | } |
| 81 | |
| 82 | static __inline__ int erase_sector_49lfxxxc(volatile uint8_t *bios, |
| 83 | unsigned long address) |
| 84 | { |
| 85 | unsigned char status; |
| 86 | |
| 87 | *bios = SECTOR_ERASE; |
| 88 | *(bios + address) = ERASE; |
| 89 | |
| 90 | do { |
| 91 | status = *bios; |
| 92 | if (status & (STATUS_ESS | STATUS_BPS)) { |
| 93 | printf("sector erase FAILED at address=0x%08lx status=0x%01x\n", (unsigned long)bios + address, status); |
| 94 | *bios = CLEAR_STATUS; |
| 95 | return(-1); |
| 96 | } |
| 97 | } while (!(status & STATUS_WSMS)); |
| 98 | |
| 99 | return (0); |
| 100 | } |
| 101 | |
| 102 | static __inline__ int write_sector_49lfxxxc(volatile uint8_t *bios, |
| 103 | uint8_t *src, |
| 104 | volatile uint8_t *dst, |
| 105 | unsigned int page_size) |
| 106 | { |
| 107 | int i; |
| 108 | unsigned char status; |
| 109 | |
| 110 | *bios = CLEAR_STATUS; |
| 111 | for (i = 0; i < page_size; i++) { |
| 112 | /* transfer data from source to destination */ |
| 113 | if (*src == 0xFF) { |
| 114 | dst++, src++; |
| 115 | /* If the data is 0xFF, don't program it */ |
| 116 | continue; |
| 117 | } |
| 118 | /*issue AUTO PROGRAM command */ |
| 119 | *bios = AUTO_PGRM; |
| 120 | *dst++ = *src++; |
| 121 | |
| 122 | do { |
| 123 | status = *bios; |
| 124 | if (status & (STATUS_ESS | STATUS_BPS)) { |
| 125 | printf("sector write FAILED at address=0x%08lx status=0x%01x\n", (unsigned long)dst, status); |
| 126 | *bios = CLEAR_STATUS; |
| 127 | return(-1); |
| 128 | } |
| 129 | } while (!(status & STATUS_WSMS)); |
| 130 | } |
| 131 | |
| 132 | return (0); |
| 133 | } |
| 134 | |
| 135 | int probe_49lfxxxc(struct flashchip *flash) |
| 136 | { |
| 137 | volatile uint8_t *bios = flash->virt_addr; |
| 138 | uint8_t id1, id2; |
| 139 | size_t size = flash->total_size * 1024; |
| 140 | |
| 141 | *bios = RESET; |
| 142 | |
| 143 | *bios = READ_ID; |
| 144 | id1 = *(volatile uint8_t *) bios; |
| 145 | id2 = *(volatile uint8_t *) (bios + 0x01); |
| 146 | |
| 147 | *bios = RESET; |
| 148 | |
| 149 | printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); |
| 150 | if (!(id1 == flash->manufacture_id && id2 == flash->model_id)) |
| 151 | return 0; |
| 152 | |
| 153 | bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED, |
Stefan Reinauer | 7038564 | 2007-04-06 11:58:03 +0000 | [diff] [blame] | 154 | fd_mem, (off_t) (0xFFFFFFFF - 0x400000 - size + 1)); |
Yinghai Lu | ca78297 | 2007-01-22 20:21:17 +0000 | [diff] [blame] | 155 | if (bios == MAP_FAILED) { |
| 156 | // it's this part but we can't map it ... |
| 157 | perror("Error MMAP /dev/mem"); |
| 158 | exit(1); |
| 159 | } |
| 160 | flash->virt_addr_2 = bios; |
| 161 | return 1; |
| 162 | } |
| 163 | |
| 164 | int erase_49lfxxxc(struct flashchip *flash) |
| 165 | { |
| 166 | volatile uint8_t *bios = flash->virt_addr; |
| 167 | volatile uint8_t *bios2 = flash->virt_addr_2; |
| 168 | int i; |
| 169 | unsigned int total_size = flash->total_size * 1024; |
| 170 | |
| 171 | write_lockbits_49lfxxxc(bios2, total_size, 0); |
| 172 | for (i = 0; i < total_size; i += flash->page_size) |
| 173 | if (erase_sector_49lfxxxc(bios, i) != 0 ) |
| 174 | return (-1); |
| 175 | |
| 176 | *bios = RESET; |
| 177 | return (0); |
| 178 | } |
| 179 | |
| 180 | int write_49lfxxxc(struct flashchip *flash, uint8_t *buf) |
| 181 | { |
| 182 | int i; |
| 183 | int total_size = flash->total_size * 1024, page_size = |
| 184 | flash->page_size; |
| 185 | volatile uint8_t *bios = flash->virt_addr; |
| 186 | |
| 187 | |
| 188 | write_lockbits_49lfxxxc(flash->virt_addr_2, total_size, 0); |
| 189 | printf("Programming Page: "); |
| 190 | for (i = 0; i < total_size / page_size; i++) { |
| 191 | /* erase the page before programming */ |
| 192 | erase_sector_49lfxxxc(bios, i * page_size); |
| 193 | |
| 194 | /* write to the sector */ |
| 195 | printf("%04d at address: 0x%08x", i, i * page_size); |
| 196 | write_sector_49lfxxxc(bios, buf + i * page_size, |
| 197 | bios + i * page_size, page_size); |
| 198 | printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 199 | } |
| 200 | printf("\n"); |
| 201 | |
| 202 | *bios = RESET; |
| 203 | return (0); |
| 204 | } |