source: trunk/sst28sf040.c @ 1474

Revision 1474, 3.4 KB checked in by hailfinger, 5 months ago (diff)

Add struct flashctx * parameter to all functions accessing flash chips.

All programmer access function prototypes except init have been made
static and moved to the respective file.

A few internal functions in flash chip drivers had chipaddr parameters
which are no longer needed.

The lines touched by flashctx changes have been adjusted to 80 columns
except in header files.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@…>
Acked-by: Michael Karcher <flashrom@…>
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
Line 
1/*
2 * This file is part of the flashrom project.
3 *
4 * Copyright (C) 2000 Silicon Integrated System Corporation
5 * Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
6 * Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
21 */
22
23#include "flash.h"
24#include "chipdrivers.h"
25
26#define AUTO_PG_ERASE1          0x20
27#define AUTO_PG_ERASE2          0xD0
28#define AUTO_PGRM               0x10
29#define CHIP_ERASE              0x30
30#define RESET                   0xFF
31#define READ_ID                 0x90
32
33int protect_28sf040(struct flashctx *flash)
34{
35        chipaddr bios = flash->virtual_memory;
36
37        chip_readb(flash, bios + 0x1823);
38        chip_readb(flash, bios + 0x1820);
39        chip_readb(flash, bios + 0x1822);
40        chip_readb(flash, bios + 0x0418);
41        chip_readb(flash, bios + 0x041B);
42        chip_readb(flash, bios + 0x0419);
43        chip_readb(flash, bios + 0x040A);
44
45        return 0;
46}
47
48int unprotect_28sf040(struct flashctx *flash)
49{
50        chipaddr bios = flash->virtual_memory;
51
52        chip_readb(flash, bios + 0x1823);
53        chip_readb(flash, bios + 0x1820);
54        chip_readb(flash, bios + 0x1822);
55        chip_readb(flash, bios + 0x0418);
56        chip_readb(flash, bios + 0x041B);
57        chip_readb(flash, bios + 0x0419);
58        chip_readb(flash, bios + 0x041A);
59
60        return 0;
61}
62
63int erase_sector_28sf040(struct flashctx *flash, unsigned int address,
64                         unsigned int sector_size)
65{
66        chipaddr bios = flash->virtual_memory;
67
68        /* This command sequence is very similar to erase_block_82802ab. */
69        chip_writeb(flash, AUTO_PG_ERASE1, bios);
70        chip_writeb(flash, AUTO_PG_ERASE2, bios + address);
71
72        /* wait for Toggle bit ready */
73        toggle_ready_jedec(flash, bios);
74
75        /* FIXME: Check the status register for errors. */
76        return 0;
77}
78
79/* chunksize is 1 */
80int write_28sf040(struct flashctx *flash, uint8_t *src, unsigned int start,
81                  unsigned int len)
82{
83        int i;
84        chipaddr bios = flash->virtual_memory;
85        chipaddr dst = flash->virtual_memory + start;
86
87        for (i = 0; i < len; i++) {
88                /* transfer data from source to destination */
89                if (*src == 0xFF) {
90                        dst++, src++;
91                        /* If the data is 0xFF, don't program it */
92                        continue;
93                }
94                /*issue AUTO PROGRAM command */
95                chip_writeb(flash, AUTO_PGRM, dst);
96                chip_writeb(flash, *src++, dst++);
97
98                /* wait for Toggle bit ready */
99                toggle_ready_jedec(flash, bios);
100        }
101
102        return 0;
103}
104
105static int erase_28sf040(struct flashctx *flash)
106{
107        chipaddr bios = flash->virtual_memory;
108
109        chip_writeb(flash, CHIP_ERASE, bios);
110        chip_writeb(flash, CHIP_ERASE, bios);
111
112        programmer_delay(10);
113        toggle_ready_jedec(flash, bios);
114
115        /* FIXME: Check the status register for errors. */
116        return 0;
117}
118
119int erase_chip_28sf040(struct flashctx *flash, unsigned int addr,
120                       unsigned int blocklen)
121{
122        if ((addr != 0) || (blocklen != flash->total_size * 1024)) {
123                msg_cerr("%s called with incorrect arguments\n",
124                        __func__);
125                return -1;
126        }
127        return erase_28sf040(flash);
128}
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