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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2007, 2008 Carl-Daniel Hailfinger
* Copyright (C) 2008 Ronald Hoogenboom <ronald@zonnet.nl>
*
* 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 ITE IT87* SPI specific routines
*/
#include <stdio.h>
#include <pci/pci.h>
#include <stdint.h>
#include <string.h>
#include "flash.h"
#include "spi.h"
#define ITE_SUPERIO_PORT1 0x2e
#define ITE_SUPERIO_PORT2 0x4e
uint16_t it8716f_flashport = 0;
/* use fast 33MHz SPI (<>0) or slow 16MHz (0) */
int fast_spi = 1;
/* Generic Super I/O helper functions */
uint8_t regval(uint16_t port, uint8_t reg)
{
outb(reg, port);
return inb(port + 1);
}
void regwrite(uint16_t port, uint8_t reg, uint8_t val)
{
outb(reg, port);
outb(val, port + 1);
}
/* Helper functions for most recent ITE IT87xx Super I/O chips */
#define CHIP_ID_BYTE1_REG 0x20
#define CHIP_ID_BYTE2_REG 0x21
static void enter_conf_mode_ite(uint16_t port)
{
outb(0x87, port);
outb(0x01, port);
outb(0x55, port);
if (port == ITE_SUPERIO_PORT1)
outb(0x55, port);
else
outb(0xaa, port);
}
static void exit_conf_mode_ite(uint16_t port)
{
regwrite(port, 0x02, 0x02);
}
static uint16_t find_ite_spi_flash_port(uint16_t port)
{
uint8_t tmp = 0;
uint16_t id, flashport = 0;
enter_conf_mode_ite(port);
id = regval(port, CHIP_ID_BYTE1_REG) << 8;
id |= regval(port, CHIP_ID_BYTE2_REG);
/* TODO: Handle more IT87xx if they support flash translation */
if (id == 0x8716) {
/* NOLDN, reg 0x24, mask out lowest bit (suspend) */
tmp = regval(port, 0x24) & 0xFE;
printf("Serial flash segment 0x%08x-0x%08x %sabled\n",
0xFFFE0000, 0xFFFFFFFF, (tmp & 1 << 1) ? "en" : "dis");
printf("Serial flash segment 0x%08x-0x%08x %sabled\n",
0x000E0000, 0x000FFFFF, (tmp & 1 << 1) ? "en" : "dis");
printf("Serial flash segment 0x%08x-0x%08x %sabled\n",
0xFFEE0000, 0xFFEFFFFF, (tmp & 1 << 2) ? "en" : "dis");
printf("Serial flash segment 0x%08x-0x%08x %sabled\n",
0xFFF80000, 0xFFFEFFFF, (tmp & 1 << 3) ? "en" : "dis");
printf("LPC write to serial flash %sabled\n",
(tmp & 1 << 4) ? "en" : "dis");
printf("serial flash pin %i\n", (tmp & 1 << 5) ? 87 : 29);
/* LDN 0x7, reg 0x64/0x65 */
regwrite(port, 0x07, 0x7);
flashport = regval(port, 0x64) << 8;
flashport |= regval(port, 0x65);
}
exit_conf_mode_ite(port);
return flashport;
}
int it87xx_probe_spi_flash(const char *name)
{
it8716f_flashport = find_ite_spi_flash_port(ITE_SUPERIO_PORT1);
if (!it8716f_flashport)
it8716f_flashport = find_ite_spi_flash_port(ITE_SUPERIO_PORT2);
return (!it8716f_flashport);
}
/* The IT8716F only supports commands with length 1,2,4,5 bytes including
command byte and can not read more than 3 bytes from the device.
This function expects writearr[0] to be the first byte sent to the device,
whereas the IT8716F splits commands internally into address and non-address
commands with the address in inverse wire order. That's why the register
ordering in case 4 and 5 may seem strange. */
int it8716f_spi_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr)
{
uint8_t busy, writeenc;
int i;
do {
busy = inb(it8716f_flashport) & 0x80;
} while (busy);
if (readcnt > 3) {
printf("%s called with unsupported readcnt %i.\n",
__FUNCTION__, readcnt);
return 1;
}
switch (writecnt) {
case 1:
outb(writearr[0], it8716f_flashport + 1);
writeenc = 0x0;
break;
case 2:
outb(writearr[0], it8716f_flashport + 1);
outb(writearr[1], it8716f_flashport + 7);
writeenc = 0x1;
break;
case 4:
outb(writearr[0], it8716f_flashport + 1);
outb(writearr[1], it8716f_flashport + 4);
outb(writearr[2], it8716f_flashport + 3);
outb(writearr[3], it8716f_flashport + 2);
writeenc = 0x2;
break;
case 5:
outb(writearr[0], it8716f_flashport + 1);
outb(writearr[1], it8716f_flashport + 4);
outb(writearr[2], it8716f_flashport + 3);
outb(writearr[3], it8716f_flashport + 2);
outb(writearr[4], it8716f_flashport + 7);
writeenc = 0x3;
break;
default:
printf("%s called with unsupported writecnt %i.\n",
__FUNCTION__, writecnt);
return 1;
}
/* Start IO, 33 or 16 MHz, readcnt input bytes, writecnt output bytes.
* Note:
* We can't use writecnt directly, but have to use a strange encoding.
*/
outb(((0x4 + (fast_spi ? 1 : 0)) << 4) | ((readcnt & 0x3) << 2) | (writeenc), it8716f_flashport);
if (readcnt > 0) {
do {
busy = inb(it8716f_flashport) & 0x80;
} while (busy);
for (i = 0; i < readcnt; i++) {
readarr[i] = inb(it8716f_flashport + 5 + i);
}
}
return 0;
}
/* Page size is usually 256 bytes */
void it8716f_spi_page_program(int block, uint8_t *buf, uint8_t *bios) {
int i;
spi_write_enable();
outb(0x06 , it8716f_flashport + 1);
outb(((2 + (fast_spi ? 1 : 0)) << 4), it8716f_flashport);
for (i = 0; i < 256; i++) {
bios[256 * block + i] = buf[256 * block + i];
}
outb(0, it8716f_flashport);
/* Wait until the Write-In-Progress bit is cleared.
* This usually takes 1-10 ms, so wait in 1 ms steps.
*/
while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
usleep(1000);
}
/*
* IT8716F only allows maximum of 512 kb SPI mapped to LPC memory cycles
* Program chip using firmware cycle byte programming. (SLOW!)
*/
int it8716f_over512k_spi_chip_write(struct flashchip *flash, uint8_t *buf)
{
int total_size = 1024 * flash->total_size;
int i;
fast_spi = 0;
spi_disable_blockprotect();
for (i = 0; i < total_size; i++) {
spi_write_enable();
spi_byte_program(i, buf[i]);
while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
myusec_delay(10);
}
/* resume normal ops... */
outb(0x20, it8716f_flashport);
return 0;
}
/*
* IT8716F only allows maximum of 512 kb SPI mapped to LPC memory cycles
* Need to read this big flash using firmware cycles 3 byte at a time.
*/
int it8716f_spi_chip_read(struct flashchip *flash, uint8_t *buf)
{
int total_size = 1024 * flash->total_size;
int i;
fast_spi = 0;
if (total_size > 512 * 1024) {
for (i = 0; i < total_size; i += 3) {
int toread = 3;
if (total_size - i < toread)
toread = total_size - i;
spi_nbyte_read(i, buf + i, toread);
}
} else {
memcpy(buf, (const char *)flash->virtual_memory, total_size);
}
return 0;
}
int it8716f_spi_chip_write(struct flashchip *flash, uint8_t *buf) {
int total_size = 1024 * flash->total_size;
int i;
if (total_size > 512 * 1024) {
it8716f_over512k_spi_chip_write(flash, buf);
} else {
for (i = 0; i < total_size / 256; i++) {
spi_page_program(i, buf, (uint8_t *)flash->virtual_memory);
}
}
return 0;
}
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