aboutsummaryrefslogtreecommitdiff
path: root/board/csb226/flash.c
blob: f6dfd9617708a482582fbbcbcaa4c51cfc500d7d (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
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
/*
 * (C) Copyright 2002
 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
 *
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.de>
 *
 * (C) Copyright 2002
 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
 *
 * (C) Copyright 2003 (2 x 16 bit Flash bank patches)
 * Rolf Peukert, IMMS gGmbH, <rolf.peukert@imms.de>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <asm/arch/pxa-regs.h>

#define FLASH_BANK_SIZE 0x02000000
#define MAIN_SECT_SIZE	0x40000		/* 2x16 = 256k per sector */

flash_info_t	flash_info[CFG_MAX_FLASH_BANKS];


/**
 * flash_init: - initialize data structures for flash chips
 *
 * @return: size of the flash
 */

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_28F128J3 & 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);

		switch (i) {
		case 0:
			flashbase = PHYS_FLASH_1;
			break;
		default:
			panic("configured too many flash banks!\n");
			break;
		}
		for (j = 0; j < flash_info[i].sector_count; j++) {
			flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
		}
		size += flash_info[i].size;
	}

	/* Protect monitor and environment sectors */
	flash_protect(FLAG_PROTECT_SET,
			CFG_FLASH_BASE,
			CFG_FLASH_BASE + monitor_flash_len - 1,
			&flash_info[0]);

	flash_protect(FLAG_PROTECT_SET,
			CFG_ENV_ADDR,
			CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
			&flash_info[0]);

	return size;
}


/**
 * flash_print_info: - print information about the flash situation
 */

void flash_print_info  (flash_info_t *info)
{
	int i, j;

	for (j=0; j<CFG_MAX_FLASH_BANKS; j++) {

		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_28F128J3 & FLASH_TYPEMASK):
			printf("28F128J3 (128Mbit)\n");
			break;
		default:
			printf("Unknown Chip Type\n");
			return;
		}

		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");
		info++;
	}
}


/**
 * flash_erase: - erase flash sectors
 */

int flash_erase(flash_info_t *info, int s_first, int s_last)
{
	int flag, prot, sect;
	int rc = ERR_OK;

	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;

	prot = 0;
	for (sect=s_first; sect<=s_last; ++sect) {
		if (info->protect[sect]) prot++;
	}

	if (prot) return ERR_PROTECTED;

	/*
	 * Disable interrupts which might cause a timeout
	 * here. Remember that our exception vectors are
	 * at address 0 in the flash, and we don't want a
	 * (ticker) exception to happen while the flash
	 * chip is in programming mode.
	 */

	flag = disable_interrupts();

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {

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

		/* arm simple, non interrupt dependent timer */
		reset_timer_masked();

		if (info->protect[sect] == 0) { /* not protected */
			u32 * volatile addr = (u32 * volatile)(info->start[sect]);

			/* erase sector:				    */
			/* The strata flashs are aligned side by side on    */
			/* the data bus, so we have to write the commands   */
			/* to both chips here:				    */

			*addr = 0x00200020;	/* erase setup */
			*addr = 0x00D000D0;	/* erase confirm */

			while ((*addr & 0x00800080) != 0x00800080) {
				if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
					*addr = 0x00B000B0; /* suspend erase*/
					*addr = 0x00FF00FF; /* read mode    */
					rc = ERR_TIMOUT;
					goto outahere;
				}
			}
			*addr = 0x00500050; /* clear status register cmd.   */
			*addr = 0x00FF00FF; /* reset to read mode	    */
		}
		printf("ok.\n");
	}
	if (ctrlc()) printf("User Interrupt!\n");

outahere:
	/* allow flash to settle - wait 10 ms */
	udelay_masked(10000);

	if (flag) enable_interrupts();

	return rc;
}

/**
 * write_long: - copy memory to flash, assume a bank of 2 devices with 16bit each
 */

static int write_long (flash_info_t *info, ulong dest, ulong data)
{
	u32 * volatile addr = (u32 * volatile)dest, val;
	int rc = ERR_OK;
	int flag;

	/* read array command - just for the case... */
	*addr = 0x00FF00FF;

	/* Check if Flash is (sufficiently) erased */
	if ((*addr & data) != data) return ERR_NOT_ERASED;

	/*
	 * Disable interrupts which might cause a timeout
	 * here. Remember that our exception vectors are
	 * at address 0 in the flash, and we don't want a
	 * (ticker) exception to happen while the flash
	 * chip is in programming mode.
	 */
	flag = disable_interrupts();

	/* clear status register command */
	*addr = 0x00500050;

	/* program set-up command */
	*addr = 0x00400040;

	/* latch address/data */
	*addr = data;

	/* arm simple, non interrupt dependent timer */
	reset_timer_masked();

	/* wait while polling the status register */
	while(((val = *addr) & 0x00800080) != 0x00800080) {
		if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
			rc = ERR_TIMOUT;
			/* suspend program command */
			*addr = 0x00B000B0;
			goto outahere;
		}
	}

	/* check for errors */
	if(val & 0x001A001A) {
		printf("\nFlash write error %02x at address %08lx\n",
			(int)val, (unsigned long)dest);
		if(val & 0x00080008) {
			printf("Voltage range error.\n");
			rc = ERR_PROG_ERROR;
			goto outahere;
		}
		if(val & 0x00020002) {
			printf("Device protect error.\n");
			rc = ERR_PROTECTED;
			goto outahere;
		}
		if(val & 0x00100010) {
			printf("Programming error.\n");
			rc = ERR_PROG_ERROR;
			goto outahere;
		}
		rc = ERR_PROG_ERROR;
		goto outahere;
	}

outahere:
	/* read array command */
	*addr = 0x00FF00FF;
	if (flag) enable_interrupts();

	return rc;
}


/**
 * write_buf: - Copy memory to flash.
 *
 * @param info:
 * @param src:	source of copy transaction
 * @param addr: where to copy to
 * @param cnt:	number of bytes to copy
 *
 * @return	error code
 */

/* "long" version, uses 32bit words */
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	ulong cp, wp;
	ulong data;
	int l;
	int i, rc;

	wp = (addr & ~3);	/* get lower word aligned address */

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - wp) != 0) {
		data = 0;
		for (i=0, cp=wp; i<l; ++i, ++cp) {
			data = (data >> 8) | (*(uchar *)cp << 24);
		}
		for (; i<4 && cnt>0; ++i) {
			data = (data >> 8) | (*src++ << 24);
			--cnt;
			++cp;
		}
		for (; cnt==0 && i<4; ++i, ++cp) {
			data = (data >> 8) | (*(uchar *)cp << 24);
		}

		if ((rc = write_long(info, wp, data)) != 0) {
			return (rc);
		}
		wp += 4;
	}

	/*
	 * handle word aligned part
	 */
	while (cnt >= 4) {
		data = *((ulong*)src);
		if ((rc = write_long(info, wp, data)) != 0) {
			return (rc);
		}
		src += 4;
		wp  += 4;
		cnt -= 4;
	}

	if (cnt == 0) return ERR_OK;

	/*
	 * handle unaligned tail bytes
	 */
	data = 0;
	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
		data = (data >> 8) | (*src++ << 24);
		--cnt;
	}
	for (; i<4; ++i, ++cp) {
		data = (data >> 8) | (*(uchar *)cp << 24);
	}

	return write_long(info, wp, data);
}