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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2000 Silicon Integrated System Corporation
* Copyright (C) 2005-2007 coresystems GmbH <stepan@coresystems.de>
* Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de>
*
* 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; version 2 of the License.
*
* 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
*/
/*
* Contains the chipset specific flash enables.
*/
#define _LARGEFILE64_SOURCE
#include <stdio.h>
#include <pci/pci.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "flash.h"
static int enable_flash_ali_m1533(struct pci_dev *dev, const char *name)
{
uint8_t tmp;
/*
* ROM Write enable, 0xFFFC0000-0xFFFDFFFF and
* 0xFFFE0000-0xFFFFFFFF ROM select enable.
*/
tmp = pci_read_byte(dev, 0x47);
tmp |= 0x46;
pci_write_byte(dev, 0x47, tmp);
return 0;
}
static int enable_flash_sis630(struct pci_dev *dev, const char *name)
{
uint8_t b;
/* Enable 0xFFF8000~0xFFFF0000 decoding on SiS 540/630. */
b = pci_read_byte(dev, 0x40);
pci_write_byte(dev, 0x40, b | 0xb);
/* Flash write enable on SiS 540/630. */
b = pci_read_byte(dev, 0x45);
pci_write_byte(dev, 0x45, b | 0x40);
/* The same thing on SiS 950 Super I/O side... */
/* First probe for Super I/O on config port 0x2e. */
outb(0x87, 0x2e);
outb(0x01, 0x2e);
outb(0x55, 0x2e);
outb(0x55, 0x2e);
if (inb(0x2f) != 0x87) {
/* If that failed, try config port 0x4e. */
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;
}
/* Datasheet:
* - Name: 82371AB PCI-TO-ISA / IDE XCELERATOR (PIIX4)
* - URL: http://www.intel.com/design/intarch/datashts/290562.htm
* - PDF: http://www.intel.com/design/intarch/datashts/29056201.pdf
* - Order Number: 290562-001
*/
static int enable_flash_piix4(struct pci_dev *dev, const char *name)
{
uint16_t old, new;
uint16_t xbcs = 0x4e; /* X-Bus Chip Select register. */
old = pci_read_word(dev, xbcs);
/* Set bit 9: 1-Meg Extended BIOS Enable (PCI master accesses to
* FFF00000-FFF7FFFF are forwarded to ISA).
* Set bit 7: Extended BIOS Enable (PCI master accesses to
* FFF80000-FFFDFFFF are forwarded to ISA).
* Set bit 6: Lower BIOS Enable (PCI master, or ISA master accesses to
* the lower 64-Kbyte BIOS block (E0000-EFFFF) at the top
* of 1 Mbyte, or the aliases at the top of 4 Gbyte
* (FFFE0000-FFFEFFFF) result in the generation of BIOSCS#.
* Note: Accesses to FFFF0000-FFFFFFFF are always forwarded to ISA.
* Set bit 2: BIOSCS# Write Enable (1=enable, 0=disable).
*/
new = old | 0x2c4;
if (new == old)
return 0;
pci_write_word(dev, xbcs, new);
if (pci_read_word(dev, xbcs) != new) {
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", xbcs, new, name);
return -1;
}
return 0;
}
/*
* See ie. page 375 of "Intel ICH7 External Design Specification"
* http://download.intel.com/design/chipsets/datashts/30701302.pdf
*/
static int enable_flash_ich(struct pci_dev *dev, const char *name,
int bios_cntl)
{
uint8_t old, new;
/*
* Note: the ICH0-ICH5 BIOS_CNTL register is actually 16 bit wide, but
* just treating it as 8 bit wide seems to work fine in practice.
*/
old = pci_read_byte(dev, bios_cntl);
new = old | 1;
if (new == old)
return 0;
pci_write_byte(dev, bios_cntl, new);
if (pci_read_byte(dev, bios_cntl) != new) {
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", bios_cntl, new, name);
return -1;
}
return 0;
}
static int enable_flash_ich_4e(struct pci_dev *dev, const char *name)
{
return enable_flash_ich(dev, name, 0x4e);
}
static int enable_flash_ich_dc(struct pci_dev *dev, const char *name)
{
return enable_flash_ich(dev, name, 0xdc);
}
static int enable_flash_vt823x(struct pci_dev *dev, const char *name)
{
uint8_t val;
/* ROM write enable */
val = pci_read_byte(dev, 0x40);
val |= 0x10;
pci_write_byte(dev, 0x40, val);
if (pci_read_byte(dev, 0x40) != val) {
printf("\nWARNING: Failed to enable ROM Write on \"%s\"\n",
name);
return -1;
}
return 0;
}
static int enable_flash_cs5530(struct pci_dev *dev, const char *name)
{
uint8_t reg8;
#define DECODE_CONTROL_REG2 0x5b /* F0 index 0x5b */
#define ROM_AT_LOGIC_CONTROL_REG 0x52 /* F0 index 0x52 */
#define LOWER_ROM_ADDRESS_RANGE (1 << 0)
#define ROM_WRITE_ENABLE (1 << 1)
#define UPPER_ROM_ADDRESS_RANGE (1 << 2)
#define BIOS_ROM_POSITIVE_DECODE (1 << 5)
/* Decode 0x000E0000-0x000FFFFF (128 KB), not just 64 KB, and
* decode 0xFF000000-0xFFFFFFFF (16 MB), not just 256 KB.
* Make the configured ROM areas writable.
*/
reg8 = pci_read_byte(dev, ROM_AT_LOGIC_CONTROL_REG);
reg8 |= LOWER_ROM_ADDRESS_RANGE;
reg8 |= UPPER_ROM_ADDRESS_RANGE;
reg8 |= ROM_WRITE_ENABLE;
pci_write_byte(dev, ROM_AT_LOGIC_CONTROL_REG, reg8);
/* Set positive decode on ROM. */
reg8 = pci_read_byte(dev, DECODE_CONTROL_REG2);
reg8 |= BIOS_ROM_POSITIVE_DECODE;
pci_write_byte(dev, DECODE_CONTROL_REG2, reg8);
return 0;
}
static int enable_flash_cs5536(struct pci_dev *dev, const char *name)
{
int fd_msr;
unsigned char buf[8];
unsigned int addr = 0x1808;
/* Geode systems write protect the BIOS via RCONFs (cache
* settings similar to MTRRs). To unlock, change MSR 0x1808
* top byte to 0x22. Reading and writing to msr, however
* requires instructions rdmsr/wrmsr, which are ring0 privileged
* instructions so only the kernel can do the read/write. This
* function, therefore, requires that the msr kernel module be
* loaded to access these instructions from user space using
* device /dev/cpu/0/msr. This hard-coded driver location
* could have potential problems on SMP machines since it
* assumes cpu0, but it is safe on the Geode which is not SMP.
*
* This is probably not portable beyond Linux.
*/
fd_msr = open("/dev/cpu/0/msr", O_RDONLY);
if (!fd_msr) {
perror("open msr");
return -1;
}
lseek64(fd_msr, (off64_t) addr, SEEK_SET);
read(fd_msr, buf, 8);
close(fd_msr);
if (buf[7] != 0x22) {
printf("Enabling Geode MSR to write to flash.\n");
buf[7] = 0x22;
fd_msr = open("/dev/cpu/0/msr", O_WRONLY);
if (!fd_msr) {
perror("open msr");
return -1;
}
lseek64(fd_msr, (off64_t) addr, SEEK_SET);
if (write(fd_msr, buf, 8) < 0) {
perror("msr write");
printf
("Cannot write to MSR. Make sure msr kernel is loaded: 'modprobe msr'\n");
return -1;
}
close(fd_msr);
}
return 0;
}
static int enable_flash_sc1100(struct pci_dev *dev, const char *name)
{
uint8_t new;
pci_write_byte(dev, 0x52, 0xee);
new = pci_read_byte(dev, 0x52);
if (new != 0xee) {
printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x52, new, name);
return -1;
}
return 0;
}
static int enable_flash_sis5595(struct pci_dev *dev, const char *name)
{
uint8_t new, newer;
new = pci_read_byte(dev, 0x45);
new &= (~0x20); /* Clear bit 5. */
new |= 0x4; /* Set bit 2. */
pci_write_byte(dev, 0x45, new);
newer = pci_read_byte(dev, 0x45);
if (newer != new) {
printf("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x45, new, name);
printf("Stuck at 0x%x\n", newer);
return -1;
}
return 0;
}
static int enable_flash_amd8111(struct pci_dev *dev, const char *name)
{
uint8_t old, new;
/* Enable decoding at 0xffb00000 to 0xffffffff. */
old = pci_read_byte(dev, 0x43);
new = old | 0xC0;
if (new != old) {
pci_write_byte(dev, 0x43, new);
if (pci_read_byte(dev, 0x43) != new) {
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x43, new, name);
}
}
old = pci_read_byte(dev, 0x40);
new = old | 0x01;
if (new == old)
return 0;
pci_write_byte(dev, 0x40, new);
if (pci_read_byte(dev, 0x40) != new) {
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x40, new, name);
return -1;
}
return 0;
}
static int enable_flash_ck804(struct pci_dev *dev, const char *name)
{
uint8_t old, new;
old = pci_read_byte(dev, 0x88);
new = old | 0xc0;
if (new != old) {
pci_write_byte(dev, 0x88, new);
if (pci_read_byte(dev, 0x88) != new) {
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x88, new, name);
}
}
old = pci_read_byte(dev, 0x6d);
new = old | 0x01;
if (new == old)
return 0;
pci_write_byte(dev, 0x6d, new);
if (pci_read_byte(dev, 0x6d) != new) {
printf("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x6d, new, name);
return -1;
}
return 0;
}
/* ATI Technologies Inc IXP SB400 PCI-ISA Bridge (rev 80) */
static int enable_flash_sb400(struct pci_dev *dev, const char *name)
{
uint8_t tmp;
struct pci_filter f;
struct pci_dev *smbusdev;
/* Look for the SMBus device. */
pci_filter_init((struct pci_access *)0, &f);
f.vendor = 0x1002;
f.device = 0x4372;
for (smbusdev = pacc->devices; smbusdev; smbusdev = smbusdev->next) {
if (pci_filter_match(&f, smbusdev)) {
break;
}
}
if (!smbusdev) {
fprintf(stderr, "ERROR: SMBus device not found. Aborting.\n");
exit(1);
}
/* Enable some SMBus stuff. */
tmp = pci_read_byte(smbusdev, 0x79);
tmp |= 0x01;
pci_write_byte(smbusdev, 0x79, tmp);
/* Change southbridge. */
tmp = pci_read_byte(dev, 0x48);
tmp |= 0x21;
pci_write_byte(dev, 0x48, tmp);
/* Now become a bit silly. */
tmp = inb(0xc6f);
outb(tmp, 0xeb);
outb(tmp, 0xeb);
tmp |= 0x40;
outb(tmp, 0xc6f);
outb(tmp, 0xeb);
outb(tmp, 0xeb);
return 0;
}
static int enable_flash_mcp55(struct pci_dev *dev, const char *name)
{
uint8_t old, new, byte;
uint16_t word;
/* Set the 0-16 MB enable bits. */
byte = pci_read_byte(dev, 0x88);
byte |= 0xff; /* 256K */
pci_write_byte(dev, 0x88, byte);
byte = pci_read_byte(dev, 0x8c);
byte |= 0xff; /* 1M */
pci_write_byte(dev, 0x8c, byte);
word = pci_read_word(dev, 0x90);
word |= 0x7fff; /* 16M */
pci_write_word(dev, 0x90, word);
old = pci_read_byte(dev, 0x6d);
new = old | 0x01;
if (new == old)
return 0;
pci_write_byte(dev, 0x6d, new);
if (pci_read_byte(dev, 0x6d) != new) {
printf
("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n",
0x6d, new, name);
return -1;
}
return 0;
}
static int enable_flash_ht1000(struct pci_dev *dev, const char *name)
{
uint8_t byte;
/* Set the 4MB enable bit. */
byte = pci_read_byte(dev, 0x41);
byte |= 0x0e;
pci_write_byte(dev, 0x41, byte);
byte = pci_read_byte(dev, 0x43);
byte |= (1 << 4);
pci_write_byte(dev, 0x43, byte);
return 0;
}
typedef struct penable {
uint16_t vendor, device;
const char *name;
int (*doit) (struct pci_dev *dev, const char *name);
} FLASH_ENABLE;
static const FLASH_ENABLE enables[] = {
{0x1039, 0x0630, "SIS630", enable_flash_sis630},
{0x8086, 0x7110, "PIIX4/PIIX4E/PIIX4M", enable_flash_piix4},
{0x8086, 0x7198, "Intel 440MX", enable_flash_piix4},
{0x8086, 0x2410, "ICH", enable_flash_ich_4e},
{0x8086, 0x2420, "ICH0", enable_flash_ich_4e},
{0x8086, 0x2440, "ICH2", enable_flash_ich_4e},
{0x8086, 0x244c, "ICH2-M", enable_flash_ich_4e},
{0x8086, 0x2480, "ICH3-S", enable_flash_ich_4e},
{0x8086, 0x248c, "ICH3-M", enable_flash_ich_4e},
{0x8086, 0x24c0, "ICH4/ICH4-L", enable_flash_ich_4e},
{0x8086, 0x24cc, "ICH4-M", enable_flash_ich_4e},
{0x8086, 0x24d0, "ICH5/ICH5R", enable_flash_ich_4e},
{0x8086, 0x2640, "ICH6/ICH6R", enable_flash_ich_dc},
{0x8086, 0x2641, "ICH6-M", enable_flash_ich_dc},
{0x8086, 0x27b0, "ICH7DH", enable_flash_ich_dc},
{0x8086, 0x27b8, "ICH7/ICH7R", enable_flash_ich_dc},
{0x8086, 0x27b9, "ICH7M", enable_flash_ich_dc},
{0x8086, 0x27bd, "ICH7MDH", enable_flash_ich_dc},
{0x8086, 0x2810, "ICH8/ICH8R", enable_flash_ich_dc},
{0x8086, 0x2812, "ICH8DH", enable_flash_ich_dc},
{0x8086, 0x2814, "ICH8DO", enable_flash_ich_dc},
{0x1106, 0x8231, "VT8231", enable_flash_vt823x},
{0x1106, 0x3177, "VT8235", enable_flash_vt823x},
{0x1106, 0x3227, "VT8237", enable_flash_vt823x},
{0x1106, 0x8324, "CX700", enable_flash_vt823x},
{0x1106, 0x0686, "VT82C686", enable_flash_amd8111},
{0x1078, 0x0100, "CS5530/CS5530A", enable_flash_cs5530},
{0x100b, 0x0510, "SC1100", enable_flash_sc1100},
{0x1039, 0x0008, "SIS5595", enable_flash_sis5595},
{0x1022, 0x2080, "AMD GEODE CS5536", enable_flash_cs5536},
{0x1022, 0x7468, "AMD8111", enable_flash_amd8111},
{0x10B9, 0x1533, "ALi M1533", enable_flash_ali_m1533},
{0x10de, 0x0050, "NVIDIA CK804", enable_flash_ck804}, /* LPC */
{0x10de, 0x0051, "NVIDIA CK804", enable_flash_ck804}, /* Pro */
{0x10de, 0x00d3, "NVIDIA CK804", enable_flash_ck804}, /* Slave, should not be here, to fix known bug for A01. */
{0x10de, 0x0260, "NVidia MCP51", enable_flash_ck804},
{0x10de, 0x0261, "NVidia MCP51", enable_flash_ck804},
{0x10de, 0x0262, "NVidia MCP51", enable_flash_ck804},
{0x10de, 0x0263, "NVidia MCP51", enable_flash_ck804},
{0x10de, 0x0360, "NVIDIA MCP55", enable_flash_mcp55}, /* M57SLI-S4 */
{0x10de, 0x0361, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0362, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0363, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0364, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0365, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0366, "NVIDIA MCP55", enable_flash_mcp55}, /* LPC */
{0x10de, 0x0367, "NVIDIA MCP55", enable_flash_mcp55}, /* Pro */
{0x1002, 0x4377, "ATI SB400", enable_flash_sb400},
{0x1166, 0x0205, "Broadcom HT-1000", enable_flash_ht1000},
};
int chipset_flash_enable(void)
{
struct pci_dev *dev = 0;
int ret = -2; /* Nothing! */
int i;
/* Now let's try to find the chipset we have... */
/* TODO: Use ARRAY_SIZE. */
for (i = 0; i < sizeof(enables) / sizeof(enables[0]); i++) {
dev = pci_dev_find(enables[i].vendor, enables[i].device);
if (dev)
break;
}
if (dev) {
printf("Found chipset \"%s\", enabling flash write... ",
enables[i].name);
ret = enables[i].doit(dev, enables[i].name);
if (ret)
printf("FAILED!\n");
else
printf("OK.\n");
}
return ret;
}