diff options
Diffstat (limited to 'util/flashrom/mx29f002.c')
| -rw-r--r-- | util/flashrom/mx29f002.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/util/flashrom/mx29f002.c b/util/flashrom/mx29f002.c new file mode 100644 index 0000000000..b281528935 --- /dev/null +++ b/util/flashrom/mx29f002.c @@ -0,0 +1,119 @@ +/* + * mx29f002.c: driver for MXIC MX29F002 flash models + * + * + * Copyright 2000 Silicon Integrated System Corporation + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * Reference: + * MX29F002/002N data sheet + * + * $Id$ + */ + +#include <stdio.h> +#include "flash.h" +#include "jedec.h" +#include "mx29f002.h" + +int probe_29f002(struct flashchip *flash) +{ + volatile char *bios = flash->virt_addr; + unsigned char id1, id2; + + *(bios + 0x5555) = 0xAA; + *(bios + 0x2AAA) = 0x55; + *(bios + 0x5555) = 0x90; + + id1 = *(volatile unsigned char *) bios; + id2 = *(volatile unsigned char *) (bios + 0x01); + + *bios = 0xF0; + + myusec_delay(10); + + printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); + if (id1 == flash->manufacture_id && id2 == flash->model_id) + return 1; + + return 0; +} + +int erase_29f002(struct flashchip *flash) +{ + volatile char *bios = flash->virt_addr; + + *(bios + 0x555) = 0xF0; + *(bios + 0x555) = 0xAA; + *(bios + 0x2AA) = 0x55; + *(bios + 0x555) = 0x80; + *(bios + 0x555) = 0xAA; + *(bios + 0x2AA) = 0x55; + *(bios + 0x555) = 0x10; + + myusec_delay(100); + toggle_ready_jedec(bios); + + // while ((*bios & 0x40) != 0x40) + //; + +#if 0 + toggle_ready_jedec(bios); + *(bios + 0x0ffff) = 0x30; + *(bios + 0x1ffff) = 0x30; + *(bios + 0x2ffff) = 0x30; + *(bios + 0x37fff) = 0x30; + *(bios + 0x39fff) = 0x30; + *(bios + 0x3bfff) = 0x30; +#endif + + return (0); +} + +int write_29f002(struct flashchip *flash, unsigned char *buf) +{ + int i; + int total_size = flash->total_size * 1024; + volatile char *bios = flash->virt_addr; + volatile char *dst = bios; + + *bios = 0xF0; + myusec_delay(10); + erase_29f002(flash); + //*bios = 0xF0; +#if 1 + printf("Programming Page: "); + for (i = 0; i < total_size; i++) { + /* write to the sector */ + if ((i & 0xfff) == 0) + printf("address: 0x%08lx", (unsigned long) i); + *(bios + 0x5555) = 0xAA; + *(bios + 0x2AAA) = 0x55; + *(bios + 0x5555) = 0xA0; + *dst++ = *buf++; + + /* wait for Toggle bit ready */ + toggle_ready_jedec(dst); + + if ((i & 0xfff) == 0) + printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); + } +#endif + printf("\n"); + + return (0); +} |