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
124 lines
3.1 KiB
C
124 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) 2007 Carl-Daniel Hailfinger
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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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/*
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* EN29F512 has 1C,21
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* EN29F010 has 1C,20
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* EN29F040A has 1C,04
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* EN29LV010 has 1C,6E and uses short F0 reset sequence
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* EN29LV040(A) has 1C,4F and uses short F0 reset sequence
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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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int probe_en29f512(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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myusec_delay(10);
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id1 = readb(bios + 0x100);
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id2 = readb(bios + 0x101);
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/* exit by writing F0 anywhere? or the code below */
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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0x2AA);
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writeb(0xF0, bios + 0x555);
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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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/*
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* EN29F002AT has 1C,92
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* EN29F002AB has 1C,97
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*/
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/* This does not seem to function properly for EN29F002NT. */
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int probe_en29f002a(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 + 0xAAA);
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writeb(0x90, bios + 0x555);
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myusec_delay(10);
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id1 = readb(bios + 0x100);
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id2 = readb(bios + 0x101);
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/* exit by writing F0 anywhere? or the code below */
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writeb(0xAA, bios + 0x555);
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writeb(0x55, bios + 0xAAA);
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writeb(0xF0, bios + 0x555);
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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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/* The EN29F002 chip needs repeated single byte writing, no block writing. */
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int write_en29f002a(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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volatile uint8_t *bios = flash->virtual_memory;
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volatile uint8_t *dst = bios;
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// *bios = 0xF0;
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myusec_delay(10);
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erase_chip_jedec(flash);
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printf("Programming page: ");
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for (i = 0; i < total_size; i++) {
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/* write to the sector */
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if ((i & 0xfff) == 0)
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printf("address: 0x%08lx", (unsigned long)i);
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writeb(0xAA, bios + 0x5555);
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writeb(0x55, bios + 0x2AAA);
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writeb(0xA0, bios + 0x5555);
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writeb(*buf++, dst++);
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/* wait for Toggle bit ready */
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toggle_ready_jedec(dst);
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if ((i & 0xfff) == 0)
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printf("\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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return 0;
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}
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