summaryrefslogtreecommitdiffstats
path: root/m29f400bt.c
blob: a043a7c1c26ddbd972e5812f1883088597030032 (plain)
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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
/*
 * m29f400bt.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:
 *
 */

#include "flash.h"
#include "m29f400bt.h"
#include "debug.h"

int probe_m29f400bt(struct flashchip *flash)
{
	volatile uint8_t *bios = flash->virt_addr;
	uint8_t id1, id2;

	*(volatile uint8_t *) (bios + 0xAAA) = 0xAA;
	*(volatile uint8_t *) (bios + 0x555) = 0x55;
	*(volatile uint8_t *) (bios + 0xAAA) = 0x90;

	myusec_delay(10);

	id1 = *(volatile uint8_t *) bios;
	id2 = *(volatile uint8_t *) (bios + 0x02);

	*(volatile uint8_t *) (bios + 0xAAA) = 0xAA;
	*(volatile uint8_t *) (bios + 0x555) = 0x55;
	*(volatile uint8_t *) (bios + 0xAAA) = 0xF0;

	myusec_delay(10);

	printf_debug("%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_m29f400bt(struct flashchip *flash)
{
	volatile uint8_t *bios = flash->virt_addr;

	*(volatile uint8_t *) (bios + 0xAAA) = 0xAA;
	*(volatile uint8_t *) (bios + 0x555) = 0x55;
	*(volatile uint8_t *) (bios + 0xAAA) = 0x80;

	*(volatile uint8_t *) (bios + 0xAAA) = 0xAA;
	*(volatile uint8_t *) (bios + 0x555) = 0x55;
	*(volatile uint8_t *) (bios + 0xAAA) = 0x10;

	myusec_delay(10);
	toggle_ready_m29f400bt(bios);

	return (0);
}

int block_erase_m29f400bt(volatile uint8_t *bios, volatile uint8_t *dst)
{

	*(volatile uint8_t *) (bios + 0xAAA) = 0xAA;
	*(volatile uint8_t *) (bios + 0x555) = 0x55;
	*(volatile uint8_t *) (bios + 0xAAA) = 0x80;

	*(volatile uint8_t *) (bios + 0xAAA) = 0xAA;
	*(volatile uint8_t *) (bios + 0x555) = 0x55;
	//*(volatile uint8_t *) (bios + 0xAAA) = 0x10;
	*dst = 0x30;

	myusec_delay(10);
	toggle_ready_m29f400bt(bios);

	return (0);
}

int write_m29f400bt(struct flashchip *flash, uint8_t *buf)
{
	int i;
	int total_size = flash->total_size * 1024, page_size =
	    flash->page_size;
	volatile uint8_t *bios = flash->virt_addr;

	//erase_m29f400bt (flash);
	printf("Programming Page:\n ");
	/*********************************
	*Pages for M29F400BT:
	* 16	0x7c000		0x7ffff		TOP
	*  8 	0x7a000		0x7bfff
	*  8 	0x78000		0x79fff
	* 32	0x70000		0x77fff
	* 64	0x60000		0x6ffff
	* 64	0x50000		0x5ffff
	* 64	0x40000		0x4ffff
	*---------------------------------
	* 64	0x30000		0x3ffff
	* 64	0x20000		0x2ffff
	* 64	0x10000		0x1ffff
	* 64	0x00000		0x0ffff		BOTTOM
	*********************************/
	printf("total_size/page_size = %d\n", total_size / page_size);
	for (i = 0; i < (total_size / page_size) - 1; i++) {
		printf("%04d at address: 0x%08x\n", i, i * page_size);
		block_erase_m29f400bt(bios, bios + i * page_size);
		write_page_m29f400bt(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("%04d at address: 0x%08x\n", 7, 0x70000);
	block_erase_m29f400bt(bios, bios + 0x70000);
	write_page_m29f400bt(bios, buf + 0x70000, bios + 0x70000,
			     32 * 1024);

	printf("%04d at address: 0x%08x\n", 8, 0x78000);
	block_erase_m29f400bt(bios, bios + 0x78000);
	write_page_m29f400bt(bios, buf + 0x78000, bios + 0x78000,
			     8 * 1024);

	printf("%04d at address: 0x%08x\n", 9, 0x7a000);
	block_erase_m29f400bt(bios, bios + 0x7a000);
	write_page_m29f400bt(bios, buf + 0x7a000, bios + 0x7a000,
			     8 * 1024);

	printf("%04d at address: 0x%08x\n", 10, 0x7c000);
	block_erase_m29f400bt(bios, bios + 0x7c000);
	write_page_m29f400bt(bios, buf + 0x7c000, bios + 0x7c000,
			     16 * 1024);

	printf("\n");
	//protect_m29f400bt (bios);

	return (0);
}

int write_linuxbios_m29f400bt(struct flashchip *flash, uint8_t *buf)
{
	volatile uint8_t *bios = flash->virt_addr;

	printf("Programming Page:\n ");
	/*********************************
	*Pages for M29F400BT:
	* 16	0x7c000		0x7ffff		TOP
	*  8 	0x7a000		0x7bfff
	*  8 	0x78000		0x79fff
	* 32	0x70000		0x77fff
	* 64	0x60000		0x6ffff
	* 64	0x50000		0x5ffff
	* 64	0x40000		0x4ffff
	*---------------------------------
	* 64	0x30000		0x3ffff
	* 64	0x20000		0x2ffff
	* 64	0x10000		0x1ffff
	* 64	0x00000		0x0ffff		BOTTOM
	*********************************/
	printf("%04d at address: 0x%08x\n", 7, 0x00000);
	block_erase_m29f400bt(bios, bios + 0x00000);
	write_page_m29f400bt(bios, buf + 0x00000, bios + 0x00000,
			     64 * 1024);

	printf("%04d at address: 0x%08x\n", 7, 0x10000);
	block_erase_m29f400bt(bios, bios + 0x10000);
	write_page_m29f400bt(bios, buf + 0x10000, bios + 0x10000,
			     64 * 1024);

	printf("%04d at address: 0x%08x\n", 7, 0x20000);
	block_erase_m29f400bt(bios, bios + 0x20000);
	write_page_m29f400bt(bios, buf + 0x20000, bios + 0x20000,
			     64 * 1024);

	printf("%04d at address: 0x%08x\n", 7, 0x30000);
	block_erase_m29f400bt(bios, bios + 0x30000);
	write_page_m29f400bt(bios, buf + 0x30000, bios + 0x30000,
			     64 * 1024);

	printf("\n");
	//protect_m29f400bt (bios);

	return (0);
}
OpenPOWER on IntegriCloud