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/*
* This file is part of the flashrom project.
*
* Copyright (C) 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Datasheet:
* - Name: Intel 82802AB/82802AC Firmware Hub (FWH)
* - URL: http://www.intel.com/design/chipsets/datashts/290658.htm
* - PDF: http://download.intel.com/design/chipsets/datashts/29065804.pdf
* - Order number: 290658-004
*/
#include "flash.h"
#include "chipdrivers.h"
// I need that Berkeley bit-map printer
void print_status_82802ab(uint8_t status)
{
msg_cdbg("%s", status & 0x80 ? "Ready:" : "Busy:");
msg_cdbg("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
msg_cdbg("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
msg_cdbg("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
msg_cdbg("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
msg_cdbg("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
msg_cdbg("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
}
int probe_82802ab(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
uint8_t id1, id2;
uint8_t flashcontent1, flashcontent2;
int shifted = (flash->feature_bits & FEATURE_ADDR_SHIFTED) != 0;
/* Reset to get a clean state */
chip_writeb(0xFF, bios);
programmer_delay(10);
/* Enter ID mode */
chip_writeb(0x90, bios);
programmer_delay(10);
id1 = chip_readb(bios + (0x00 << shifted));
id2 = chip_readb(bios + (0x01 << shifted));
/* Leave ID mode */
chip_writeb(0xFF, bios);
programmer_delay(10);
msg_cdbg("%s: id1 0x%02x, id2 0x%02x", __func__, id1, id2);
if (!oddparity(id1))
msg_cdbg(", id1 parity violation");
/* Read the product ID location again. We should now see normal flash contents. */
flashcontent1 = chip_readb(bios + (0x00 << shifted));
flashcontent2 = chip_readb(bios + (0x01 << shifted));
if (id1 == flashcontent1)
msg_cdbg(", id1 is normal flash content");
if (id2 == flashcontent2)
msg_cdbg(", id2 is normal flash content");
msg_cdbg("\n");
if (id1 != flash->manufacture_id || id2 != flash->model_id)
return 0;
if (flash->feature_bits & FEATURE_REGISTERMAP)
map_flash_registers(flash);
return 1;
}
uint8_t wait_82802ab(struct flashchip *flash)
{
uint8_t status;
chipaddr bios = flash->virtual_memory;
chip_writeb(0x70, bios);
if ((chip_readb(bios) & 0x80) == 0) { // it's busy
while ((chip_readb(bios) & 0x80) == 0) ;
}
status = chip_readb(bios);
/* Reset to get a clean state */
chip_writeb(0xFF, bios);
return status;
}
int unlock_82802ab(struct flashchip *flash)
{
int i;
//chipaddr wrprotect = flash->virtual_registers + page + 2;
for (i = 0; i < flash->total_size * 1024; i+= flash->page_size)
{
chip_writeb(0, flash->virtual_registers + i + 2);
}
return 0;
}
int erase_block_82802ab(struct flashchip *flash, unsigned int page, unsigned int pagesize)
{
chipaddr bios = flash->virtual_memory;
uint8_t status;
// clear status register
chip_writeb(0x50, bios + page);
// now start it
chip_writeb(0x20, bios + page);
chip_writeb(0xd0, bios + page);
programmer_delay(10);
// now let's see what the register is
status = wait_82802ab(flash);
print_status_82802ab(status);
/* FIXME: Check the status register for errors. */
return 0;
}
/* chunksize is 1 */
int write_82802ab(struct flashchip *flash, uint8_t *src, int start, int len)
{
int i;
chipaddr dst = flash->virtual_memory + start;
for (i = 0; i < len; i++) {
/* transfer data from source to destination */
chip_writeb(0x40, dst);
chip_writeb(*src++, dst++);
wait_82802ab(flash);
}
/* FIXME: Ignore errors for now. */
return 0;
}
int unlock_28f004s5(struct flashchip *flash)
{
chipaddr bios = flash->virtual_memory;
uint8_t mcfg, bcfg, need_unlock = 0, can_unlock = 0;
int i;
/* Clear status register */
chip_writeb(0x50, bios);
/* Read identifier codes */
chip_writeb(0x90, bios);
/* Read master lock-bit */
mcfg = chip_readb(bios + 0x3);
msg_cdbg("master lock is ");
if (mcfg) {
msg_cdbg("locked!\n");
} else {
msg_cdbg("unlocked!\n");
can_unlock = 1;
}
/* Read block lock-bits */
for (i = 0; i < flash->total_size * 1024; i+= (64 * 1024)) {
bcfg = chip_readb(bios + i + 2); // read block lock config
msg_cdbg("block lock at %06x is %slocked!\n", i, bcfg ? "" : "un");
if (bcfg) {
need_unlock = 1;
}
}
/* Reset chip */
chip_writeb(0xFF, bios);
/* Unlock: clear block lock-bits, if needed */
if (can_unlock && need_unlock) {
msg_cdbg("Unlock: ");
chip_writeb(0x60, bios);
chip_writeb(0xD0, bios);
chip_writeb(0xFF, bios);
msg_cdbg("Done!\n");
}
/* Error: master locked or a block is locked */
if (!can_unlock && need_unlock) {
msg_cerr("At least one block is locked and lockdown is active!\n");
return -1;
}
return 0;
}
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