summaryrefslogtreecommitdiffstats
path: root/msys_doc.c
blob: 04c56049b8ff3bfc0d58dabdae42382339f2e258 (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
/*
 * msys_doc.c: driver for programming m-systems doc devices
 *
 *
 * Copyright 2003   Niki W. Waibel <niki.waibel@gmx.net>
 *
 *	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.
 */

#include <stdio.h>
#include <unistd.h>
#include "flash.h"
#include "msys_doc.h"
#include "debug.h"

static int doc_wait(volatile uint8_t *bios, int timeout);
static uint8_t doc_read_chipid(volatile uint8_t *bios);
static uint8_t doc_read_docstatus(volatile uint8_t *bios);
static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios);
static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data);

int probe_md2802(struct flashchip *flash)
{
	volatile uint8_t *bios = flash->virt_addr;
	uint8_t chipid;
#ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
	uint8_t id_0x55, id_0xAA;
#endif				/* !MSYSTEMS_DOC_NO_55AA_CHECKING */
	int i, toggle_a, toggle_b;

	printf_debug("%s:\n", __FUNCTION__);
	printf_debug("%s: *******************************\n", __FUNCTION__);
	printf_debug("%s: * THIS IS A PRE ALPHA VERSION *\n", __FUNCTION__);
	printf_debug("%s: * IN THE DEVELOPEMENT *********\n", __FUNCTION__);
	printf_debug("%s: * PROCESS RIGHT NOW. **********\n", __FUNCTION__);
	printf_debug("%s: *******************************\n", __FUNCTION__);
	printf_debug("%s: * IF YOU ARE NOT A DEVELOPER **\n", __FUNCTION__);
	printf_debug("%s: * THEN DO NOT TRY TO READ OR **\n", __FUNCTION__);
	printf_debug("%s: * WRITE TO THIS DEVICE ********\n", __FUNCTION__);
	printf_debug("%s: *******************************\n", __FUNCTION__);
	printf_debug("%s:\n", __FUNCTION__);

	printf_debug("%s: switching off reset mode ...\n", __FUNCTION__);
	doc_write(0x85, bios, DOCControl);
	doc_write(0x85, bios, DOCControl);
	doc_read_4nop(bios);
	if (doc_wait(bios, 5000))
		return (-1);
	printf("%s: switching off reset mode ... done\n", __FUNCTION__);
	printf("%s:\n", __FUNCTION__);

	printf("%s: switching off write protection ...\n", __FUNCTION__);
	doc_write_cdsncontrol(bios, doc_read_cdsncontrol(bios) & (~0x08));
	printf("%s: switching off write protection ... done\n", __FUNCTION__);
	printf("%s:\n", __FUNCTION__);

	chipid = doc_read_chipid(bios);
#ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
	id_0x55 = doc_read(bios, IPL_0x0000);
	id_0xAA = doc_read(bios, IPL_0x0001);
#endif				/* !MSYSTEMS_DOC_NO_55AA_CHECKING */
	printf("%s: IPL_0x0000: 0x%02x\n", __FUNCTION__, id_0x55);
	printf("%s: IPL_0x0001: 0x%02x\n", __FUNCTION__, id_0xAA);
	printf("%s: IPL_0x0002: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, IPL_0x0002));
	printf("%s: IPL_0x0003: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, IPL_0x0003));
	printf("%s:\n", __FUNCTION__);
	printf("%s: ChipID: 0x%02x\n", __FUNCTION__, chipid);
	printf("%s: DOCStatus: 0x%02x\n", __FUNCTION__,
	       doc_read_docstatus(bios));
	printf("%s: FloorSelect: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, FloorSelect));
	printf("%s: CDSNControl: 0x%02x\n", __FUNCTION__,
	       doc_read_cdsncontrol(bios));
	printf("%s: CDSNDeviceSelect: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, CDSNDeviceSelect));
	printf("%s: ECCConfiguration: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ECCConfiguration));
	printf("%s: CDSNSlowIO: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, CDSNSlowIO));
	printf("%s: ECCSyndrome0: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ECCSyndrome0));
	printf("%s: ECCSyndrome1: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ECCSyndrome1));
	printf("%s: ECCSyndrome2: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ECCSyndrome2));
	printf("%s: ECCSyndrome3: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ECCSyndrome3));
	printf("%s: ECCSyndrome4: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ECCSyndrome4));
	printf("%s: ECCSyndrome5: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ECCSyndrome5));
	printf("%s: AliasResolution: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, AliasResolution));
	printf("%s: ConfigurationInput: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ConfigurationInput));
	printf("%s: ReadPipelineInitialization: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, ReadPipelineInitialization));
	printf("%s: LastDataRead: 0x%02x\n", __FUNCTION__,
	       doc_read(bios, LastDataRead));
	printf("%s:\n", __FUNCTION__);

	printf("%s: checking ECCConfiguration toggle bit\n", __FUNCTION__);
	printf("%s:", __FUNCTION__);
	toggle_a = toggle_b = 0;
	for (i = 0; i < 10; i++) {
		uint8_t toggle = doc_toggle(bios);

		printf(" 0x%02x", toggle);

		if (i % 2)
			toggle_a += toggle;
		else
			toggle_b += toggle;
	}			/* for(i=0; i<10; i++) */
	printf("\n%s: toggle result: %d/%d\n", __FUNCTION__, toggle_a,
	       toggle_b);

	if (chipid == flash->model_id && ((toggle_a == 5 && toggle_b == 0)
					  || (toggle_a == 0 && toggle_b == 5))
#ifndef MSYSTEMS_DOC_NO_55AA_CHECKING
	    && id_0x55 == 0x55 && id_0xAA == 0xaa
#endif				/* !MSYSTEMS_DOC_NO_55AA_CHECKING */
	    ) {
		return (1);
	}

	return (0);
}				/* int probe_md2802(struct flashchip *flash) */

int read_md2802(struct flashchip *flash, uint8_t *buf)
{

	return (0);
}				/* int read_md2802(struct flashchip *flash, uint8_t *buf) */

int erase_md2802(struct flashchip *flash)
{
	volatile uint8_t *bios = flash->virt_addr;

	return (1);
	*(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) = 0x10;
}				/* int erase_md2802(struct flashchip *flash) */

int write_md2802(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->virt_addr;

	return (1);
	erase_md2802(flash);
	if (*bios != (uint8_t) 0xff) {
		printf("ERASE FAILED\n");
		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_md2802(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_md2802(bios);

	return 0;
}				/* int write_md2802(struct flashchip *flash, uint8_t *buf) */

/*
	wait timeout msec for doc to become ready
	return:
		0: ready
		-1: timeout expired
*/
static int doc_wait(volatile uint8_t *bios, int timeout)
{
	int i = 20;

	doc_read_4nop(bios);

	while (_doc_busy(bios) && (i != 0)) {
		usleep(timeout * 1000 / 20);
		i--;
	}

	doc_read_2nop(bios);

	if (_doc_busy(bios)) {
		doc_read_2nop(bios);
		return (-1);
	}

	return (0);
}				/* static int doc_wait(volatile uint8_t *bios, int timeout) */

static uint8_t doc_read_docstatus(volatile uint8_t *bios)
{
	doc_read(bios, CDSNSlowIO);
	doc_read_2nop(bios);

	return (doc_read(bios, _DOCStatus));
}				/* static uint8_t doc_read_docstatus(volatile uint8_t *bios) */

static uint8_t doc_read_chipid(volatile uint8_t *bios)
{
	doc_read(bios, CDSNSlowIO);
	doc_read_2nop(bios);

	return (doc_read(bios, _ChipID));
}				/* static uint8_t doc_read_chipid(volatile uint8_t *bios) */

static uint8_t doc_read_cdsncontrol(volatile uint8_t *bios)
{
	uint8_t value;

	/* the delays might be necessary when reading the busy bit,
	   but because a read to this reg reads the busy bit
	   anyway we better do this delays... */
	doc_read_4nop(bios);
	value = doc_read(bios, _CDSNControl);
	doc_read_2nop(bios);

	return (value);
}				/* static uint8_t doc_read_chipid(volatile char *bios) */

static void doc_write_cdsncontrol(volatile uint8_t *bios, uint8_t data)
{
	doc_write(data, bios, _CDSNControl);
	doc_read_4nop(bios);
}				/* static void doc_write_chipid(volatile char *bios, uint8_t data) */
OpenPOWER on IntegriCloud