File: sst28sf040.c

package info (click to toggle)
flashrom 0.9.2+r1141-2
  • links: PTS
  • area: main
  • in suites: squeeze
  • size: 1,536 kB
  • ctags: 1,827
  • sloc: ansic: 20,878; makefile: 322
file content (152 lines) | stat: -rw-r--r-- 3,939 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2000 Silicon Integrated System Corporation
 * Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
 * Copyright (C) 2009 Sean Nelson <audiohacked@gmail.com>
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include "flash.h"
#include "chipdrivers.h"

#define AUTO_PG_ERASE1		0x20
#define AUTO_PG_ERASE2		0xD0
#define AUTO_PGRM		0x10
#define CHIP_ERASE		0x30
#define RESET			0xFF
#define READ_ID			0x90

static void protect_28sf040(chipaddr bios)
{
	chip_readb(bios + 0x1823);
	chip_readb(bios + 0x1820);
	chip_readb(bios + 0x1822);
	chip_readb(bios + 0x0418);
	chip_readb(bios + 0x041B);
	chip_readb(bios + 0x0419);
	chip_readb(bios + 0x040A);
}

static void unprotect_28sf040(chipaddr bios)
{
	chip_readb(bios + 0x1823);
	chip_readb(bios + 0x1820);
	chip_readb(bios + 0x1822);
	chip_readb(bios + 0x0418);
	chip_readb(bios + 0x041B);
	chip_readb(bios + 0x0419);
	chip_readb(bios + 0x041A);
}

int erase_sector_28sf040(struct flashchip *flash, unsigned int address, unsigned int sector_size)
{
	chipaddr bios = flash->virtual_memory;

	chip_writeb(AUTO_PG_ERASE1, bios);
	chip_writeb(AUTO_PG_ERASE2, bios + address);

	/* wait for Toggle bit ready         */
	toggle_ready_jedec(bios);

	if (check_erased_range(flash, address, sector_size)) {
		msg_cerr("ERASE FAILED!\n");
		return -1;
	}
	return 0;
}

static int write_sector_28sf040(chipaddr bios, uint8_t *src, chipaddr dst,
				unsigned int page_size)
{
	int i;

	for (i = 0; i < page_size; i++) {
		/* transfer data from source to destination */
		if (*src == 0xFF) {
			dst++, src++;
			/* If the data is 0xFF, don't program it */
			continue;
		}
		/*issue AUTO PROGRAM command */
		chip_writeb(AUTO_PGRM, dst);
		chip_writeb(*src++, dst++);

		/* wait for Toggle bit ready */
		toggle_ready_jedec(bios);
	}

	return 0;
}

static int erase_28sf040(struct flashchip *flash)
{
	chipaddr bios = flash->virtual_memory;

	unprotect_28sf040(bios);
	chip_writeb(CHIP_ERASE, bios);
	chip_writeb(CHIP_ERASE, bios);
	protect_28sf040(bios);

	programmer_delay(10);
	toggle_ready_jedec(bios);

	if (check_erased_range(flash, 0, flash->total_size * 1024)) {
		msg_cerr("ERASE FAILED!\n");
		return -1;
	}
	return 0;
}

int write_28sf040(struct flashchip *flash, uint8_t *buf)
{
	int i;
	int total_size = flash->total_size * 1024;
	int page_size = flash->page_size;
	chipaddr bios = flash->virtual_memory;

	unprotect_28sf040(bios);

	msg_cinfo("Programming page: ");
	for (i = 0; i < total_size / page_size; i++) {
		/* erase the page before programming */
		if (erase_sector_28sf040(flash, i * page_size, page_size)) {
			msg_cerr("ERASE FAILED!\n");
			return -1;
		}

		/* write to the sector */
		msg_cinfo("%04d at address: 0x%08x", i, i * page_size);
		write_sector_28sf040(bios, buf + i * page_size,
				     bios + i * page_size, page_size);
		msg_cinfo("\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");
	}
	msg_cinfo("\n");

	protect_28sf040(bios);

	return 0;
}

int erase_chip_28sf040(struct flashchip *flash, unsigned int addr, unsigned int blocklen)
{
	if ((addr != 0) || (blocklen != flash->total_size * 1024)) {
		msg_cerr("%s called with incorrect arguments\n",
			__func__);
		return -1;
	}
	return erase_28sf040(flash);
}