summaryrefslogtreecommitdiffstats
path: root/jedec.c
blob: 821ebd401acf561f3bdbfac3b9e7112919d64284 (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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2000 Silicon Integrated System Corporation
 * Copyright (C) 2006 Giampiero Giancipoli <gianci@email.it>
 * Copyright (C) 2006 coresystems GmbH <info@coresystems.de>
 * Copyright (C) 2007 Carl-Daniel Hailfinger
 *
 * 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 <stdio.h>
#include <stdint.h>
#include "flash.h"

#define MAX_REFLASH_TRIES 0x10

/* Check one byte for odd parity */
uint8_t oddparity(uint8_t val)
{
	val = (val ^ (val >> 4)) & 0xf;
	val = (val ^ (val >> 2)) & 0x3;
	return (val ^ (val >> 1)) & 0x1;
}

void toggle_ready_jedec(volatile uint8_t *dst)
{
	unsigned int i = 0;
	uint8_t tmp1, tmp2;

	tmp1 = *dst & 0x40;

	while (i++ < 0xFFFFFFF) {
		tmp2 = *dst & 0x40;
		if (tmp1 == tmp2) {
			break;
		}
		tmp1 = tmp2;
	}
}

void data_polling_jedec(volatile uint8_t *dst, uint8_t data)
{
	unsigned int i = 0;
	uint8_t tmp;

	data &= 0x80;

	while (i++ < 0xFFFFFFF) {
		tmp = *dst & 0x80;
		if (tmp == data) {
			break;
		}
	}
}

void unprotect_jedec(volatile uint8_t *bios)
{
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	*(volatile uint8_t *)(bios + 0x5555) = 0x80;
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	*(volatile uint8_t *)(bios + 0x5555) = 0x20;

	usleep(200);
}

void protect_jedec(volatile uint8_t *bios)
{
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	*(volatile uint8_t *)(bios + 0x5555) = 0xA0;

	usleep(200);
}

int probe_jedec(struct flashchip *flash)
{
	volatile uint8_t *bios = flash->virtual_memory;
	uint8_t id1, id2;
	uint32_t largeid1, largeid2;

	/* Issue JEDEC Product ID Entry command */
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x5555) = 0x90;
	/* Older chips may need up to 100 us to respond. The ATMEL 29C020
	 * needs 10 ms according to the data sheet, but it has been tested
	 * to work reliably with 2 ms.
	 */
	myusec_delay(2000);

	/* Read product ID */
	id1 = *(volatile uint8_t *)bios;
	id2 = *(volatile uint8_t *)(bios + 0x01);
	largeid1 = id1;
	largeid2 = id2;

	/* Check if it is a continuation ID, this should be a while loop. */
	if (id1 == 0x7F) {
		largeid1 <<= 8;
		id1 = *(volatile uint8_t *)(bios + 0x100);
		largeid1 |= id1;
	}
	if (id2 == 0x7F) {
		largeid2 <<= 8;
		id2 = *(volatile uint8_t *)(bios + 0x101);
		largeid2 |= id2;
	}

	/* Issue JEDEC Product ID Exit command */
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x5555) = 0xF0;
	myusec_delay(40);

	printf_debug("%s: id1 0x%x, id2 0x%x", __FUNCTION__, largeid1, largeid2);
	if (!oddparity(id1))
		printf_debug(", id1 parity violation");
	printf_debug("\n");
	if (largeid1 == flash->manufacture_id && largeid2 == flash->model_id)
		return 1;

	return 0;
}

int erase_sector_jedec(volatile uint8_t *bios, unsigned int page)
{
	/*  Issue the Sector Erase command   */
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x5555) = 0x80;
	myusec_delay(10);

	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + page) = 0x30;
	myusec_delay(10);

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

	return 0;
}

int erase_block_jedec(volatile uint8_t *bios, unsigned int block)
{
	/*  Issue the Sector Erase command   */
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x5555) = 0x80;
	myusec_delay(10);

	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + block) = 0x50;
	myusec_delay(10);

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

	return 0;
}

int erase_chip_jedec(struct flashchip *flash)
{
	volatile uint8_t *bios = flash->virtual_memory;

	/*  Issue the JEDEC Chip Erase command   */
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x5555) = 0x80;
	myusec_delay(10);

	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile uint8_t *)(bios + 0x5555) = 0x10;
	myusec_delay(10);

	toggle_ready_jedec(bios);

	return 0;
}

int write_page_write_jedec(volatile uint8_t *bios, uint8_t *src,
			   volatile uint8_t *dst, int page_size)
{
	int i, tried = 0, start_index = 0, ok;
	volatile uint8_t *d = dst;
	uint8_t *s = src;

retry:
	/* Issue JEDEC Data Unprotect comand */
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	*(volatile uint8_t *)(bios + 0x5555) = 0xA0;

	/* transfer data from source to destination */
	for (i = start_index; i < page_size; i++) {
		/* If the data is 0xFF, don't program it */
		if (*src != 0xFF)
			*dst = *src;
		dst++;
		src++;
	}

	toggle_ready_jedec(dst - 1);

	dst = d;
	src = s;
	ok = 1;
	for (i = 0; i < page_size; i++) {
		if (*dst != *src) {
			ok = 0;
			break;
		}
		dst++;
		src++;
	}

	if (!ok && tried++ < MAX_REFLASH_TRIES) {
		start_index = i;
		goto retry;
	}
	if (!ok) {
		fprintf(stderr, " page %d failed!\n",
			(unsigned int)(d - bios) / page_size);
	}
	return !ok;
}

int write_byte_program_jedec(volatile uint8_t *bios, uint8_t *src,
			     volatile uint8_t *dst)
{
	int tried = 0, ok = 1;

	/* If the data is 0xFF, don't program it */
	if (*src == 0xFF) {
		return -1;
	}

retry:
	/* Issue JEDEC Byte Program command */
	*(volatile uint8_t *)(bios + 0x5555) = 0xAA;
	*(volatile uint8_t *)(bios + 0x2AAA) = 0x55;
	*(volatile uint8_t *)(bios + 0x5555) = 0xA0;

	/* transfer data from source to destination */
	*dst = *src;
	toggle_ready_jedec(bios);

	if (*dst != *src && tried++ < MAX_REFLASH_TRIES) {
		goto retry;
	}

	if (tried >= MAX_REFLASH_TRIES)
		ok = 0;

	return !ok;
}

int write_sector_jedec(volatile uint8_t *bios, uint8_t *src,
		       volatile uint8_t *dst, unsigned int page_size)
{
	int i;

	for (i = 0; i < page_size; i++) {
		write_byte_program_jedec(bios, src, dst);
		dst++, src++;
	}

	return 0;
}

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

	erase_chip_jedec(flash);
	// dumb check if erase was successful.
	for (i = 0; i < total_size; i++) {
		if (bios[i] != (uint8_t) 0xff) {
			printf("ERASE FAILED @%d, val %02x!\n", i, bios[i]);
			return -1;
		}
	}

	printf("Programming page: ");
	for (i = 0; i < total_size / page_size; i++) {
		printf("%04d at address: 0x%08x", i, i * page_size);
		write_page_write_jedec(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("\n");
	protect_jedec(bios);

	return 0;
}
OpenPOWER on IntegriCloud