summaryrefslogtreecommitdiffstats
path: root/board/ml2/flash.c
blob: 87cb1ff18e1f76a4389c826bbe446442b526da86 (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
/*
 * flash.c: Support code for the flash chips on the Xilinx ML2 board
 *
 * Copyright 2002 Mind NV
 *
 * http://www.mind.be/
 *
 * Author : Peter De Schrijver (p2@mind.be)
 *
 * This software may be used and distributed according to the terms of
 * the GNU General Public License (GPL) version 2, incorporated herein by
 * reference. Drivers based on or derived from this code fall under the GPL
 * and must retain the authorship, copyright and this license notice. This
 * file is not a complete program and may only be used when the entire program
 * is licensed under the GPL.
 *
 */

#include <common.h>
#include <asm/u-boot.h>
#include <configs/ML2.h>

#define FLASH_BANK_SIZE (64*1024*1024)

flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];

#define SECT_SIZE		(512*1024)

#define CMD_READ_ARRAY	0x00FF00FF00FF00FULL
#define CMD_IDENTIFY        0x0090009000900090ULL
#define CMD_ERASE_SETUP     0x0020002000200020ULL
#define CMD_ERASE_CONFIRM   0x00D000D000D000D0ULL
#define CMD_PROGRAM     0x0040004000400040ULL
#define CMD_RESUME      0x00D000D000D000D0ULL
#define CMD_SUSPEND     0x00B000B000B000B0ULL
#define CMD_STATUS_READ     0x0070007000700070ULL
#define CMD_STATUS_RESET    0x0050005000500050ULL

#define BIT_BUSY        0x0080008000800080ULL
#define BIT_ERASE_SUSPEND   0x004000400400040ULL
#define BIT_ERASE_ERROR     0x0020002000200020ULL
#define BIT_PROGRAM_ERROR   0x0010001000100010ULL
#define BIT_VPP_RANGE_ERROR 0x0008000800080008ULL
#define BIT_PROGRAM_SUSPEND 0x0004000400040004ULL
#define BIT_PROTECT_ERROR   0x0002000200020002ULL
#define BIT_UNDEFINED       0x0001000100010001ULL

#define BIT_SEQUENCE_ERROR  0x0030003000300030ULL

#define BIT_TIMEOUT     0x80000000


inline void eieio(void) {

	__asm__ __volatile__ ("eieio" : : : "memory");

}

ulong flash_init(void) {

	int i, j;
	ulong size = 0;

	for(i=0;i<CFG_MAX_FLASH_BANKS;i++) {
		ulong flashbase = 0;

		flash_info[i].flash_id = (INTEL_MANUFACT & FLASH_VENDMASK) |
								 (INTEL_ID_28F128J3A & FLASH_TYPEMASK);
		flash_info[i].size = FLASH_BANK_SIZE;
		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
		if (i==0)
			flashbase = CFG_FLASH_BASE;
		else
			panic("configured too many flash banks!\n");
		for (j = 0; j < flash_info[i].sector_count; j++)
				flash_info[i].start[j]=flashbase + j * SECT_SIZE;

		size += flash_info[i].size;
	}

	return size;
}

void flash_print_info  (flash_info_t *info) {

	int i;

	switch (info->flash_id & FLASH_VENDMASK) {
		case (INTEL_MANUFACT & FLASH_VENDMASK):
			printf("Intel: ");
			break;
		default:
			printf("Unknown Vendor ");
			break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
		case (INTEL_ID_28F128J3A & FLASH_TYPEMASK):
			printf("4x 28F128J3A (128Mbit)\n");
			break;
		default:
			printf("Unknown Chip Type\n");
			break;
	}

	printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
	printf("  Sector Start Addresses:");
	for (i = 0; i < info->sector_count; i++) {
		if ((i % 5) == 0)
			printf("\n   ");
		printf (" %08lX%s", info->start[i],
				 info->protect[i] ? " (RO)" : "     ");
	}
	printf ("\n");
}

int flash_error (unsigned long long code) {

	if (code & BIT_TIMEOUT) {
		printf ("Timeout\n");
		return ERR_TIMOUT;
	}

	if (~code & BIT_BUSY) {
		printf ("Busy\n");
		return ERR_PROG_ERROR;
	}

	if (code & BIT_VPP_RANGE_ERROR) {
		printf ("Vpp range error\n");
		return ERR_PROG_ERROR;
	}

	if (code & BIT_PROTECT_ERROR) {
		printf ("Device protect error\n");
		return ERR_PROG_ERROR;
	}

	if (code & BIT_SEQUENCE_ERROR) {
		printf ("Command seqence error\n");
		return ERR_PROG_ERROR;
	}

	if (code & BIT_ERASE_ERROR) {
		printf ("Block erase error\n");
		return ERR_PROG_ERROR;
	}

	if (code & BIT_PROGRAM_ERROR) {
		printf ("Program error\n");
		return ERR_PROG_ERROR;
	}

	if (code & BIT_ERASE_SUSPEND) {
		printf ("Block erase suspended\n");
		return ERR_PROG_ERROR;
	}

	if (code & BIT_PROGRAM_SUSPEND) {
		printf ("Program suspended\n");
		return ERR_PROG_ERROR;
	}

	return ERR_OK;

}

int flash_erase (flash_info_t *info, int s_first, int s_last) {

	int rc = ERR_OK;
	int sect;
	unsigned long long result;

	if (info->flash_id == FLASH_UNKNOWN)
		return ERR_UNKNOWN_FLASH_TYPE;

	if ((s_first < 0) || (s_first > s_last))
		return ERR_INVAL;

	if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
		return ERR_UNKNOWN_FLASH_VENDOR;

	for (sect=s_first; sect<=s_last; ++sect)
		if (info->protect[sect])
			return ERR_PROTECTED;

	for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
		volatile unsigned long long *addr=
									(unsigned long long *)(info->start[sect]);

		printf("Erasing sector %2d ... ", sect);

		*addr=CMD_STATUS_RESET;
		eieio();
		*addr=CMD_ERASE_SETUP;
		eieio();
		*addr=CMD_ERASE_CONFIRM;
		eieio();

		do {
			result = *addr;
		} while(~result & BIT_BUSY);

		*addr=CMD_READ_ARRAY;

		if ((rc = flash_error(result)) == ERR_OK)
			printf("ok.\n");
		else
			break;
	}

	if (ctrlc())
		printf("User Interrupt!\n");

	return rc;
}

static int write_word (flash_info_t *info, ulong dest, unsigned long long data) {

	volatile unsigned long long *addr=(unsigned long long *)dest;
	unsigned long long result;
	int rc = ERR_OK;

	result=*addr;
	if ((result & data) != data)
		return ERR_NOT_ERASED;

	*addr=CMD_STATUS_RESET;
	eieio();
	*addr=CMD_PROGRAM;
	eieio();
	*addr=data;
	eieio();

	do {
		result=*addr;
	} while(~result & BIT_BUSY);

	*addr=CMD_READ_ARRAY;

	rc = flash_error(result);

	return rc;

}

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) {

	ulong cp, wp;
	unsigned long long data;
	int l;
	int i,rc;

	wp=(addr & ~7);

	if((l=addr-wp) != 0) {
		data=0;
		for(i=0,cp=wp;i<l;++i,++cp)
			data = (data >> 8) | (*(uchar *)cp << 24);

		for (; i<8 && cnt>0; ++i) {
			data = (data >> 8) | (*src++ << 24);
			--cnt;
			++cp;
		}

		for (; i<8; ++i, ++cp)
			data = (data >> 8) | (*(uchar *)cp << 24);

		if ((rc = write_word(info, wp, data)) != 0)
			return rc;

		wp+=8;
	}

	while(cnt>=8) {
		data=*((unsigned long long *)src);
		if ((rc = write_word(info, wp, data)) != 0)
			return rc;
		src+=8;
		wp+=8;
		cnt-=8;
	}

	if(cnt == 0)
		return ERR_OK;

	data = 0;
	for (i=0, cp=wp; i<8 && cnt>0; ++i, ++cp) {
		data = (data >> 8) | (*src++ << 24);
		--cnt;
	}
	for (; i<8; ++i, ++cp) {
		data = (data >> 8) | (*(uchar *)cp << 24);
	}

	return write_word(info, wp, data);

}
OpenPOWER on IntegriCloud