ac12ecd27a
Right now we perform direct pointer manipulation without any abstraction to read from and write to memory mapped flash chips. That makes it impossible to drive any flasher which does not mmap the whole chip. Using helper functions readb() and writeb() allows a driver for external flash programmers like Paraflasher to replace readb and writeb with calls to its own chip access routines. This patch has the additional advantage of removing lots of unnecessary casts to volatile uint8_t * and now-superfluous parentheses which caused poor readability. I used the semantic patcher Coccinelle to create this patch. The semantic patch follows: @@ expression a; typedef uint8_t; volatile uint8_t *b; @@ - *(b) = (a); + writeb(a, b); @@ volatile uint8_t *b; @@ - *(b) + readb(b) @@ type T; T b; @@ ( readb | writeb ) (..., - (T) - (b) + b ) In contrast to a sed script, the semantic patch performs type checking before converting anything. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: FENG Yu Ning <fengyuning1984@gmail.com> Tested-by: Joe Julian git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3971 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
/*
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* This file is part of the flashrom project.
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*
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* Copyright (C) 2000 Silicon Integrated System Corporation
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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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static __inline__ int erase_sector_29f040b(volatile uint8_t *bios,
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unsigned long address)
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{
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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0x2AA);
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writeb(0x80, bios + 0x555);
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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0x2AA);
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writeb(0x30, bios + address);
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sleep(2);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios + address);
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return 0;
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}
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static __inline__ int write_sector_29f040b(volatile uint8_t *bios,
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uint8_t *src,
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volatile uint8_t *dst,
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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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if ((i & 0xfff) == 0xfff)
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printf("0x%08lx", (unsigned long)dst -
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(unsigned long)bios);
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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0x2AA);
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writeb(0xA0, bios + 0x555);
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writeb(*src++, dst++);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(bios);
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if ((i & 0xfff) == 0xfff)
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printf("\b\b\b\b\b\b\b\b\b\b");
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}
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return 0;
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}
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int probe_29f040b(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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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0x2AA);
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writeb(0x90, bios + 0x555);
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id1 = readb(bios);
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id2 = readb(bios + 0x01);
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writeb(0xF0, bios);
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myusec_delay(10);
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printf_debug("%s: id1 0x%02x, id2 0x%02x\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_29f040b(struct flashchip *flash)
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{
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volatile uint8_t *bios = flash->virtual_memory;
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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0x2AA);
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writeb(0x80, bios + 0x555);
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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0x2AA);
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writeb(0x10, bios + 0x555);
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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_29f040b(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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printf("Programming page ");
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for (i = 0; i < total_size / page_size; i++) {
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/* erase the page before programming */
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erase_sector_29f040b(bios, i * page_size);
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/* write to the sector */
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printf("%04d at address: ", i);
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write_sector_29f040b(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");
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}
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printf("\n");
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return 0;
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}
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