From 5e5f75e559f605974afd3767bc650a1cc0ed6f1f Mon Sep 17 00:00:00 2001 From: "Ronald G. Minnich" Date: Tue, 29 Jan 2002 18:21:41 +0000 Subject: Trying to make this general purpose user-land flash burner Corresponding to coreboot v1 svn r489. --- flash_rom.c | 196 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 196 insertions(+) create mode 100644 flash_rom.c (limited to 'flash_rom.c') diff --git a/flash_rom.c b/flash_rom.c new file mode 100644 index 0000000..12aa273 --- /dev/null +++ b/flash_rom.c @@ -0,0 +1,196 @@ +/* + * flash_rom.c: Flash programming utility for SiS 630/950 M/Bs + * + * + * 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: + * 1. SiS 630 Specification + * 2. SiS 950 Specification + * + * $Id$ + */ + +#include +#include +#include +#include +#include +#include + +#include "flash.h" +#include "jedec.h" + +struct flashchip flashchips[] = { + {"Am29F040B", AMD_ID, AM_29F040B, NULL, 512, 64*1024, + probe_29f040b, erase_29f040b, write_29f040b}, + {"At29C040A", ATMEL_ID, AT_29C040A, NULL, 512, 256, + probe_jedec, erase_jedec, write_jedec}, + {"Mx29f002", MX_ID, MX_29F002, NULL, 256, 64*1024, + probe_29f002, erase_29f002, write_29f002}, + {"SST29EE020A", SST_ID, SST_29EE020A, NULL, 256, 128, + probe_jedec, erase_jedec, write_jedec}, + {"SST28SF040A", SST_ID, SST_28SF040, NULL, 512, 256, + probe_28sf040, erase_28sf040, write_28sf040}, + {"W29C020C", WINBOND_ID, W_29C020C, NULL, 256, 128, + probe_jedec, erase_jedec, write_jedec}, + {NULL,} +}; + +int enable_flash_sis630 (void) +{ + char b; + + /* get io privilege access PCI configuration space */ + if (iopl(3) != 0) { + perror("Can not set io priviliage"); + exit(1); + } + + /* Enable 0xFFF8000~0xFFFF0000 decoding on SiS 540/630 */ + outl(0x80000840, 0x0cf8); + b = inb(0x0cfc) | 0x0b; + outb(b, 0xcfc); + /* Flash write enable on SiS 540/630 */ + outl(0x80000845, 0x0cf8); + b = inb(0x0cfd) | 0x40; + outb(b, 0xcfd); + + /* The same thing on SiS 950 SuperIO side */ + outb(0x87, 0x2e); + outb(0x01, 0x2e); + outb(0x55, 0x2e); + outb(0x55, 0x2e); + + if (inb(0x2f) != 0x87) { + outb(0x87, 0x4e); + outb(0x01, 0x4e); + outb(0x55, 0x4e); + outb(0xaa, 0x4e); + if (inb(0x4f) != 0x87) { + printf("Can not access SiS 950\n"); + return -1; + } + outb(0x24, 0x4e); + b = inb(0x4f) | 0xfc; + outb(0x24, 0x4e); + outb(b, 0x4f); + outb(0x02, 0x4e); + outb(0x02, 0x4f); + } + + outb(0x24, 0x2e); + printf("2f is %#x\n", inb(0x2f)); + b = inb(0x2f) | 0xfc; + outb(0x24, 0x2e); + outb(b, 0x2f); + + outb(0x02, 0x2e); + outb(0x02, 0x2f); + + return 0; +} + +struct flashchip * probe_flash(struct flashchip * flash) +{ + int fd_mem; + char * bios; + unsigned long size; + + if ((fd_mem = open("/dev/mem", O_RDWR)) < 0) { + perror("Can not open /dev/mem"); + exit(1); + } + + while (flash->name != NULL) { + size = flash->total_size * 1024; + bios = mmap (0, size, PROT_WRITE | PROT_READ, MAP_SHARED, + fd_mem, (off_t) (0 - size)); + if (bios == MAP_FAILED) { + perror("Error MMAP /dev/mem"); + exit(1); + } + flash->virt_addr = bios; + + if (flash->probe(flash) == 1) { + printf ("%s found at physical address: 0x%lx\n", + flash->name, (0 - size), bios); + return flash; + } + munmap (bios, size); + flash++; + } + return NULL; +} + +int verify_flash (struct flashchip * flash, char * buf) +{ + int i = 0; + int total_size = flash->total_size *1024; + char * bios = flash->virt_addr; + + printf("Verifying address: "); + while (i++ < total_size) { + printf("0x%08x", i); + if (*(bios+i) != *(buf+i)) { + return 0; + } + printf("\b\b\b\b\b\b\b\b\b\b"); + } + printf("\n"); + return 1; +} + +main (int argc, char * argv[]) +{ + char * buf; + unsigned long size; + FILE * image; + struct flashchip * flash; + + if (argc > 2){ + printf("usage: %s [romimage]\n", argv[0]); + printf(" If no romimage is specified, then all that happens\n"); + printf(" is that flash writes are enabled (useful for DoC)\n"); + exit(1); + } + + enable_flash_sis630 (); + + if ((flash = probe_flash (flashchips)) == NULL) { + printf("EEPROM not found\n"); + exit(1); + } + + if (argc < 2){ + printf("OK, only ENABLING flash write, but NOT FLASHING\n"); + exit(0); + } + size = flash->total_size * 1024; + + if ((image = fopen (argv[1], "r")) == NULL) { + perror("Error opening image file"); + exit(1); + } + + buf = (char *) calloc (size, sizeof(char)); + fread (buf, sizeof(char), size, image); + + flash->write (flash, buf); + verify_flash (flash, buf); +} -- cgit v1.1