| Carl-Daniel Hailfinger | ae8afa9 | 2007-12-31 01:49:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the flashrom project. |
| 3 | * |
| 4 | * Copyright (C) 2007 Carl-Daniel Hailfinger |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | EN29F512 has 1C,21 |
| 23 | EN29F010 has 1C,20 |
| 24 | EN29F040A has 1C,04 |
| 25 | EN29LV010 has 1C,6E and uses short F0 reset sequence |
| 26 | EN29LV040(A) has 1C,4F and uses short F0 reset sequence |
| 27 | */ |
| 28 | int probe_en29f512(struct flashchip *flash) |
| 29 | { |
| 30 | volatile uint8_t *bios = flash->virtual_memory; |
| 31 | uint8_t id1, id2; |
| 32 | |
| 33 | *(volatile uint8_t *)(bios + 0x555) = 0xAA; |
| 34 | *(volatile uint8_t *)(bios + 0x2AA) = 0x55; |
| 35 | *(volatile uint8_t *)(bios + 0x555) = 0x90; |
| 36 | |
| 37 | myusec_delay(10); |
| 38 | |
| 39 | id1 = *(volatile uint8_t *)(bios + 0x100); |
| 40 | id2 = *(volatile uint8_t *)(bios + 0x101); |
| 41 | |
| 42 | /* exit by writing F0 anywhere? or the code below */ |
| 43 | *(volatile uint8_t *)(bios + 0x555) = 0xAA; |
| 44 | *(volatile uint8_t *)(bios + 0x2AA) = 0x55; |
| 45 | *(volatile uint8_t *)(bios + 0x555) = 0xF0; |
| 46 | |
| 47 | printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); |
| 48 | |
| 49 | if (id1 == flash->manufacture_id && id2 == flash->model_id) |
| 50 | return 1; |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | /* |
| 56 | EN29F002AT has 1C,92 |
| 57 | EN29F002AB has 1C,97 |
| 58 | */ |
| 59 | int probe_en29f002a(struct flashchip *flash) |
| 60 | { |
| 61 | volatile uint8_t *bios = flash->virtual_memory; |
| 62 | uint8_t id1, id2; |
| 63 | |
| 64 | *(volatile uint8_t *)(bios + 0x555) = 0xAA; |
| 65 | *(volatile uint8_t *)(bios + 0xAAA) = 0x55; |
| 66 | *(volatile uint8_t *)(bios + 0x555) = 0x90; |
| 67 | |
| 68 | myusec_delay(10); |
| 69 | |
| 70 | id1 = *(volatile uint8_t *)(bios + 0x100); |
| 71 | id2 = *(volatile uint8_t *)(bios + 0x101); |
| 72 | |
| 73 | /* exit by writing F0 anywhere? or the code below */ |
| 74 | *(volatile uint8_t *)(bios + 0x555) = 0xAA; |
| 75 | *(volatile uint8_t *)(bios + 0xAAA) = 0x55; |
| 76 | *(volatile uint8_t *)(bios + 0x555) = 0xF0; |
| 77 | |
| 78 | printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); |
| 79 | |
| 80 | if (id1 == flash->manufacture_id && id2 == flash->model_id) |
| 81 | return 1; |
| 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |