diff options
Diffstat (limited to 'util/flashrom/en29f002a.c')
| -rw-r--r-- | util/flashrom/en29f002a.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/util/flashrom/en29f002a.c b/util/flashrom/en29f002a.c new file mode 100644 index 0000000000..e2b4f9b09b --- /dev/null +++ b/util/flashrom/en29f002a.c @@ -0,0 +1,85 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2007 Carl-Daniel Hailfinger + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + EN29F512 has 1C,21 + EN29F010 has 1C,20 + EN29F040A has 1C,04 + EN29LV010 has 1C,6E and uses short F0 reset sequence + EN29LV040(A) has 1C,4F and uses short F0 reset sequence + */ +int probe_en29f512(struct flashchip *flash) +{ + volatile uint8_t *bios = flash->virtual_memory; + uint8_t id1, id2; + + *(volatile uint8_t *)(bios + 0x555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AA) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0x90; + + myusec_delay(10); + + id1 = *(volatile uint8_t *)(bios + 0x100); + id2 = *(volatile uint8_t *)(bios + 0x101); + + /* exit by writing F0 anywhere? or the code below */ + *(volatile uint8_t *)(bios + 0x555) = 0xAA; + *(volatile uint8_t *)(bios + 0x2AA) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0xF0; + + printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); + + if (id1 == flash->manufacture_id && id2 == flash->model_id) + return 1; + + return 0; +} + +/* + EN29F002AT has 1C,92 + EN29F002AB has 1C,97 + */ +int probe_en29f002a(struct flashchip *flash) +{ + volatile uint8_t *bios = flash->virtual_memory; + uint8_t id1, id2; + + *(volatile uint8_t *)(bios + 0x555) = 0xAA; + *(volatile uint8_t *)(bios + 0xAAA) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0x90; + + myusec_delay(10); + + id1 = *(volatile uint8_t *)(bios + 0x100); + id2 = *(volatile uint8_t *)(bios + 0x101); + + /* exit by writing F0 anywhere? or the code below */ + *(volatile uint8_t *)(bios + 0x555) = 0xAA; + *(volatile uint8_t *)(bios + 0xAAA) = 0x55; + *(volatile uint8_t *)(bios + 0x555) = 0xF0; + + printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); + + if (id1 == flash->manufacture_id && id2 == flash->model_id) + return 1; + + return 0; +} + |