/*
* 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 <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/io.h>
#include <unistd.h>
#include <stdio.h>
#include <pci/pci.h>
#include "flash.h"
#include "jedec.h"
#include "m29f400bt.h"
#include "82802ab.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},
{"SST39SF020A", SST_ID, SST_39SF020, NULL, 256, 4096,
probe_39sf020, erase_39sf020, write_39sf020},
{"SST39VF020", SST_ID, SST_39VF020, NULL, 256, 4096,
probe_39sf020, erase_39sf020, write_39sf020},
{"W29C011", WINBOND_ID, W_29C011, NULL, 128, 128,
probe_jedec, erase_jedec, write_jedec},
{"W29C020C", WINBOND_ID, W_29C020C, NULL, 256, 128,
probe_jedec, erase_jedec, write_jedec},
{"W49F002U", WINBOND_ID, W_49F002U, NULL, 256, 128,
probe_49f002, erase_49f002, write_49f002},
{"M29F400BT", ST_ID, ST_M29F400BT , NULL, 512, 64*1024,
probe_m29f400bt, erase_m29f400bt, write_linuxbios_m29f400bt},
{"82802ab", 137, 173 , NULL, 512, 64*1024,
probe_82802ab, erase_82802ab, write_82802ab},
{"82802ac", 137, 172 , NULL, 1024, 64*1024,
probe_82802ab, erase_82802ab, write_82802ab},
{NULL,}
};
int enable_flash_sis630 (struct pci_dev *dev, char *name)
{
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;
}
int
enable_flash_e7500(struct pci_dev *dev, char *name) {
/* register 4e.b gets or'ed with one */
unsigned char old, new;
int ok;
/* if it fails, it fails. There are so many variations of broken mobos
* that it is hard to argue that we should quit at this point.
*/
old = pci_read_byte(dev, 0x4e);
new = old | 1;
ok = pci_write_byte(dev, 0x4e, new);
if (ok != new) {
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
old, new, name);
return -1;
}
return 0;
}
struct flashchip * probe_flash(struct flashchip * flash)
{
int fd_mem;
volatile 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) {
printf("Trying %s, %d KB\n", flash->name, flash->total_size);
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;
flash->fd_mem = fd_mem;
if (flash->probe(flash) == 1) {
printf ("%s found at physical address: 0x%lx\n",
flash->name, (0 - size), bios);
return flash;
}
munmap ((void *) bios, size);
flash++;
}
return NULL;
}
int verify_flash (struct flashchip * flash, char * buf)
{
int i = 0;
int total_size = flash->total_size *1024;
volatile 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;
}
// count to a billion. Time it. If it's < 1 sec, count to 10B, etc.
unsigned long micro = 0;
void
myusec_calibrate_delay()
{
unsigned long count = 20 * 1024 * 1024;
volatile unsigned long i;
unsigned long timeusec;
struct timeval start, end;
int ok = 0;
fprintf(stderr, "Setting up microsecond timing loop\n");
while (! ok) {
//fprintf(stderr, "Try %d\n", count);
gettimeofday(&start, 0);
for( i = count; i; i--)
;
gettimeofday(&end, 0);
timeusec = 1000000 * (end.tv_sec - start.tv_sec ) +
(end.tv_usec - start.tv_usec);
fprintf(stderr, "timeusec is %d\n", timeusec);
count *= 10;
if (timeusec < 1000000)
continue;
ok = 1;
}
// compute one microsecond. That will be count / time
micro = count / timeusec;
//fprintf(stderr, "one us is %d count\n", micro);
}
void
myusec_delay(time)
{
volatile unsigned long i;
for(i = 0; i < time * micro; i++)
;
}
typedef struct penable {
unsigned short vendor, device;
char *name;
int (*doit)(struct pci_dev *dev, char *name);
} FLASH_ENABLE;
FLASH_ENABLE enables[] = {
{0x1, 0x1, "sis630 -- what's the ID?", enable_flash_sis630},
{0x8086, 0x2480, "E7500", enable_flash_e7500},
};
int
enable_flash_write() {
int i;
struct pci_access *pacc;
struct pci_dev *dev = 0;
unsigned int c;
FLASH_ENABLE *enable = 0;
pacc = pci_alloc(); /* Get the pci_access structure */
/* Set all options you want -- here we stick with the defaults */
pci_init(pacc); /* Initialize the PCI library */
pci_scan_bus(pacc); /* We want to get the list of devices */
/* now let's try to find the chipset we have ... */
for(i = 0; i < sizeof(enables)/sizeof(enables[0]) && (! dev); i++) {
struct pci_filter f;
struct pci_dev *z;
/* the first param is unused. */
pci_filter_init((struct pci_access *) 0, &f);
f.vendor = enables[i].vendor;
f.device = enables[i].device;
for(z=pacc->devices; z; z=z->next)
if (pci_filter_match(&f, z)) {
enable = &enables[i];
dev = z;
}
}
/* now do the deed. */
enable->doit(dev, enable->name);
return 0;
}
int
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 info is dumped\n");
}
/* try to enable it. Failure IS an option, since not all motherboards
* really need this to be done, etc., etc. It sucks.
*/
(void) enable_flash_write();
if ((flash = probe_flash (flashchips)) == NULL) {
printf("EEPROM not found\n");
exit(1);
}
printf("Part is %s\n", flash->name);
if (argc < 2){
printf("OK, only ENABLING flash write, but NOT FLASHING\n");
return 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);
printf("Calibrating timer since microsleep sucks ... takes a second\n");
myusec_calibrate_delay();
printf("OK, calibrated, now do the deed\n");
flash->write (flash, buf);
verify_flash (flash, buf);
return 0;
}