From 7d5c7a7f1794cf846f2b62813c81f0f2a0ac5b54 Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Thu, 24 Nov 2005 10:45:34 +0000 Subject: rename the directory to match the program name git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2102 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- util/flashrom/jedec.c | 219 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 219 insertions(+) create mode 100644 util/flashrom/jedec.c (limited to 'util/flashrom/jedec.c') diff --git a/util/flashrom/jedec.c b/util/flashrom/jedec.c new file mode 100644 index 0000000000..353b17ab98 --- /dev/null +++ b/util/flashrom/jedec.c @@ -0,0 +1,219 @@ +/* + * jedec.c: driver for programming JEDEC standard flash parts + * + * + * 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: + * + * $Id$ + */ + +#include +#include "flash.h" +#include "jedec.h" + +int probe_jedec(struct flashchip *flash) +{ + volatile unsigned char *bios = flash->virt_addr; + unsigned char id1, id2; + + /* Issue JEDEC Product ID Entry command */ + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + 0x5555) = 0x90; + myusec_delay(10); + + /* Read product ID */ + id1 = *(volatile unsigned char *) bios; + id2 = *(volatile unsigned char *) (bios + 0x01); + + /* Issue JEDEC Product ID Exit command */ + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + 0x5555) = 0xF0; + myusec_delay(10); + + printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); + if (id1 == flash->manufacture_id && id2 == flash->model_id) + return 1; + + return 0; +} + +int erase_sector_jedec(volatile unsigned char *bios, unsigned int page) +{ + /* Issue the Sector Erase command */ + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + 0x5555) = 0x80; + myusec_delay(10); + + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + page) = 0x30; + myusec_delay(10); + + /* wait for Toggle bit ready */ + toggle_ready_jedec(bios); + + return (0); +} + +int erase_block_jedec(volatile unsigned char *bios, unsigned int block) +{ + /* Issue the Sector Erase command */ + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + 0x5555) = 0x80; + myusec_delay(10); + + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + block) = 0x50; + myusec_delay(10); + + /* wait for Toggle bit ready */ + toggle_ready_jedec(bios); + + return (0); +} + +int erase_chip_jedec(struct flashchip *flash) +{ + volatile unsigned char *bios = flash->virt_addr; + + /* Issue the JEDEC Chip Erase command */ + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + 0x5555) = 0x80; + myusec_delay(10); + + *(volatile char *) (bios + 0x5555) = 0xAA; + myusec_delay(10); + *(volatile char *) (bios + 0x2AAA) = 0x55; + myusec_delay(10); + *(volatile char *) (bios + 0x5555) = 0x10; + myusec_delay(10); + + toggle_ready_jedec(bios); + + return (0); +} + +int write_page_write_jedec(volatile unsigned char *bios, unsigned char *src, + volatile unsigned char *dst, int page_size) +{ + int i; + + /* Issue JEDEC Data Unprotect comand */ + *(volatile unsigned char *) (bios + 0x5555) = 0xAA; + *(volatile unsigned char *) (bios + 0x2AAA) = 0x55; + *(volatile unsigned char *) (bios + 0x5555) = 0xA0; + + /* transfer data from source to destination */ + for (i = 0; i < page_size; i++) { + /* If the data is 0xFF, don't program it */ + if (*src == 0xFF) + continue; + *dst++ = *src++; + } + + toggle_ready_jedec(dst - 1); + + return 0; +} + +int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src, + volatile unsigned char *dst) +{ + int tried = 0; + + /* If the data is 0xFF, don't program it */ + if (*src == 0xFF) { + return 0; + } + +retry: + /* Issue JEDEC Byte Program command */ + *(volatile unsigned char *) (bios + 0x5555) = 0xAA; + *(volatile unsigned char *) (bios + 0x2AAA) = 0x55; + *(volatile unsigned char *) (bios + 0x5555) = 0xA0; + + /* transfer data from source to destination */ + *dst = *src; + toggle_ready_jedec(bios); + + if (*dst != *src && tried++ < 0x10) { + goto retry; + } + + return 0; +} + +int write_sector_jedec(volatile unsigned char *bios, unsigned char *src, + volatile unsigned char *dst, unsigned int page_size) +{ + int i; + + for (i = 0; i < page_size; i++) { + write_byte_program_jedec(bios, src, dst); + dst++, src++; + } + + return (0); +} + +int write_jedec(struct flashchip *flash, unsigned char *buf) +{ + int i; + int total_size = flash->total_size * 1024; + int page_size = flash->page_size; + volatile unsigned char *bios = flash->virt_addr; + + erase_chip_jedec(flash); + if (*bios != (unsigned char) 0xff) { + printf("ERASE FAILED\n"); + return -1; + } + printf("Programming Page: "); + for (i = 0; i < total_size / page_size; i++) { + printf("%04d at address: 0x%08x", i, i * page_size); + write_page_write_jedec(bios, buf + i * page_size, + bios + i * page_size, page_size); + 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"); + } + printf("\n"); + protect_jedec(bios); + + return (0); +} -- cgit v1.2.3