256 lines
6.1 KiB
C
256 lines
6.1 KiB
C
/*
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* jedec.c: driver for programming JEDEC standard flash parts
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*
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*
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* Copyright 2000 Silicon Integrated System Corporation
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* Copyright 2006 Giampiero Giancipoli <gianci@email.it>
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* Copyright 2006 coresystems GmbH <info@coresystems.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Reference:
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*
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "flash.h"
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#include "jedec.h"
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#include "debug.h"
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#define MAX_REFLASH_TRIES 0x10
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int probe_jedec(struct flashchip *flash)
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{
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volatile uint8_t *bios = flash->virtual_memory;
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uint8_t id1, id2;
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/* Issue JEDEC Product ID Entry command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x90;
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myusec_delay(10);
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/* Read product ID */
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id1 = *(volatile uint8_t *)bios;
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id2 = *(volatile uint8_t *)(bios + 0x01);
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/* Issue JEDEC Product ID Exit command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xF0;
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myusec_delay(10);
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printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
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if (id1 == flash->manufacture_id && id2 == flash->model_id)
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return 1;
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return 0;
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}
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int erase_sector_jedec(volatile uint8_t *bios, unsigned int page)
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{
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/* Issue the Sector Erase command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x80;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + page) = 0x30;
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myusec_delay(10);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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return (0);
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}
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int erase_block_jedec(volatile uint8_t *bios, unsigned int block)
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{
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/* Issue the Sector Erase command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x80;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + block) = 0x50;
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myusec_delay(10);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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return (0);
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}
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int erase_chip_jedec(struct flashchip *flash)
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{
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volatile uint8_t *bios = flash->virtual_memory;
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/* Issue the JEDEC Chip Erase command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x80;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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myusec_delay(10);
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*(volatile uint8_t *)(bios + 0x5555) = 0x10;
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myusec_delay(10);
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toggle_ready_jedec(bios);
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return (0);
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}
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int write_page_write_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst, int page_size)
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{
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int i, tried = 0, start_index = 0, ok;
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volatile uint8_t *d = dst;
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uint8_t *s = src;
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retry:
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/* Issue JEDEC Data Unprotect comand */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
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/* transfer data from source to destination */
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for (i = start_index; i < page_size; i++) {
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/* If the data is 0xFF, don't program it */
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if (*src != 0xFF)
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*dst = *src;
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dst++;
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src++;
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}
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toggle_ready_jedec(dst - 1);
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dst = d;
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src = s;
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ok = 1;
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for (i = 0; i < page_size; i++) {
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if (*dst != *src) {
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ok = 0;
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break;
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}
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dst++;
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src++;
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}
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if (!ok && tried++ < MAX_REFLASH_TRIES) {
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start_index = i;
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goto retry;
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}
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if (!ok) {
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fprintf(stderr, " page %d failed!\n",
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(unsigned int)(d - bios) / page_size);
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}
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return (!ok);
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}
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int write_byte_program_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst)
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{
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int tried = 0, ok = 1;
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/* If the data is 0xFF, don't program it */
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if (*src == 0xFF) {
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return -1;
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}
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retry:
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/* Issue JEDEC Byte Program command */
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*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
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*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
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*(volatile uint8_t *)(bios + 0x5555) = 0xA0;
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/* transfer data from source to destination */
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*dst = *src;
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toggle_ready_jedec(bios);
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if (*dst != *src && tried++ < MAX_REFLASH_TRIES) {
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goto retry;
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}
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if (tried >= MAX_REFLASH_TRIES)
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ok = 0;
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return (!ok);
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}
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int write_sector_jedec(volatile uint8_t *bios, uint8_t *src,
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volatile uint8_t *dst, unsigned int page_size)
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{
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int i;
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for (i = 0; i < page_size; i++) {
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write_byte_program_jedec(bios, src, dst);
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dst++, src++;
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}
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return (0);
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}
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int write_jedec(struct flashchip *flash, uint8_t *buf)
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{
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int i;
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int total_size = flash->total_size * 1024;
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int page_size = flash->page_size;
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volatile uint8_t *bios = flash->virtual_memory;
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erase_chip_jedec(flash);
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// dumb check if erase was successful.
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for (i = 0; i < total_size; i++) {
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if (bios[i] != (uint8_t) 0xff) {
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printf("ERASE FAILED\n");
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return -1;
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}
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}
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printf("Programming Page: ");
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for (i = 0; i < total_size / page_size; i++) {
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printf("%04d at address: 0x%08x", i, i * page_size);
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write_page_write_jedec(bios, buf + i * page_size,
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bios + i * page_size, page_size);
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printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
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}
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printf("\n");
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protect_jedec(bios);
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return (0);
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}
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