summaryrefslogtreecommitdiffstats
path: root/board/cu824/flash.c
blob: bd0f8d326213661fa82e4dd038f732ccbb353854 (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
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, wd@denx.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 <mpc824x.h>
#include <asm/processor.h>

#if defined(CONFIG_ENV_IS_IN_FLASH)
# ifndef  CONFIG_ENV_ADDR
#  define CONFIG_ENV_ADDR	(CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
# endif
# ifndef  CONFIG_ENV_SIZE
#  define CONFIG_ENV_SIZE	CONFIG_ENV_SECT_SIZE
# endif
# ifndef  CONFIG_ENV_SECT_SIZE
#  define CONFIG_ENV_SECT_SIZE  CONFIG_ENV_SIZE
# endif
#endif

#define FLASH_BANK_SIZE 0x800000
#define MAIN_SECT_SIZE  0x40000
#define PARAM_SECT_SIZE 0x8000

#define BOARD_CTRL_REG 0xFE800013

flash_info_t    flash_info[CONFIG_SYS_MAX_FLASH_BANKS];

static int write_data (flash_info_t *info, ulong dest, ulong *data);
static void write_via_fpu(vu_long *addr, ulong *data);
static __inline__ unsigned long get_msr(void);
static __inline__ void set_msr(unsigned long msr);

/*---------------------------------------------------------------------*/
#undef	DEBUG_FLASH

/*---------------------------------------------------------------------*/
#ifdef DEBUG_FLASH
#define DEBUGF(fmt,args...) printf(fmt ,##args)
#else
#define DEBUGF(fmt,args...)
#endif
/*---------------------------------------------------------------------*/

/*-----------------------------------------------------------------------
 */

unsigned long flash_init(void)
{
    int i, j;
    ulong size = 0;
    volatile unsigned char *bcr = (volatile unsigned char *)(BOARD_CTRL_REG);

    DEBUGF("Write protect was: 0x%02X\n", *bcr);
    *bcr &= 0x1;	/* FWPT must be 0  */
    *bcr |= 0x6;	/* FWP0 = FWP1 = 1 */
    DEBUGF("Write protect is:  0x%02X\n", *bcr);

    for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
	vu_long *addr = (vu_long *)(CONFIG_SYS_FLASH_BASE + i * FLASH_BANK_SIZE);

	addr[0] = 0x00900090;

	DEBUGF ("Flash bank # %d:\n"
		"\tManuf. ID @ 0x%08lX: 0x%08lX\n"
		"\tDevice ID @ 0x%08lX: 0x%08lX\n",
		i,
		(ulong)(&addr[0]), addr[0],
		(ulong)(&addr[2]), addr[2]);

	if ((addr[0] == addr[1]) && (addr[0] == INTEL_MANUFACT) &&
	    (addr[2] == addr[3]) && (addr[2] == INTEL_ID_28F160F3B))
	{
	    flash_info[i].flash_id = (FLASH_MAN_INTEL & FLASH_VENDMASK) |
				     (INTEL_ID_28F160F3B & FLASH_TYPEMASK);
	} else {
	    flash_info[i].flash_id = FLASH_UNKNOWN;
	    addr[0] = 0xFFFFFFFF;
	    goto Done;
	}

	DEBUGF ("flash_id = 0x%08lX\n", flash_info[i].flash_id);

	addr[0] = 0xFFFFFFFF;

	flash_info[i].size = FLASH_BANK_SIZE;
	flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
	memset(flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
	for (j = 0; j < flash_info[i].sector_count; j++) {
		if (j <= 7) {
			flash_info[i].start[j] = CONFIG_SYS_FLASH_BASE +
						 i * FLASH_BANK_SIZE +
						 j * PARAM_SECT_SIZE;
		} else {
			flash_info[i].start[j] = CONFIG_SYS_FLASH_BASE +
						 i * FLASH_BANK_SIZE +
						 (j - 7)*MAIN_SECT_SIZE;
		}
	}
	size += flash_info[i].size;
    }

    /* Protect monitor and environment sectors
     */
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
    flash_protect(FLAG_PROTECT_SET,
	      CONFIG_SYS_MONITOR_BASE,
	      CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
	      &flash_info[1]);
#else
    flash_protect(FLAG_PROTECT_SET,
	      CONFIG_SYS_MONITOR_BASE,
	      CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
	      &flash_info[0]);
#endif
#endif

#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
#if CONFIG_ENV_ADDR >= CONFIG_SYS_FLASH_BASE + FLASH_BANK_SIZE
    flash_protect(FLAG_PROTECT_SET,
	      CONFIG_ENV_ADDR,
	      CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
	      &flash_info[1]);
#else
    flash_protect(FLAG_PROTECT_SET,
	      CONFIG_ENV_ADDR,
	      CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
	      &flash_info[0]);
#endif
#endif

Done:
    return size;
}

/*-----------------------------------------------------------------------
 */
void flash_print_info (flash_info_t * info)
{
	int i;

	switch ((i = info->flash_id & FLASH_VENDMASK)) {
	case (FLASH_MAN_INTEL & FLASH_VENDMASK):
		printf ("Intel: ");
		break;
	default:
		printf ("Unknown Vendor 0x%04x ", i);
		break;
	}

	switch ((i = info->flash_id & FLASH_TYPEMASK)) {
	case (INTEL_ID_28F160F3B & FLASH_TYPEMASK):
		printf ("28F160F3B (16Mbit)\n");
		break;
	default:
		printf ("Unknown Chip Type 0x%04x\n", i);
		goto Done;
		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");

Done:
	return;
}

/*-----------------------------------------------------------------------
 */

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	int flag, prot, sect;
	ulong start, now, last;

	DEBUGF ("Erase flash bank %d sect %d ... %d\n",
		info - &flash_info[0], s_first, s_last);

	if ((s_first < 0) || (s_first > s_last)) {
		if (info->flash_id == FLASH_UNKNOWN) {
			printf ("- missing\n");
		} else {
			printf ("- no sectors to erase\n");
		}
		return 1;
	}

	if ((info->flash_id & FLASH_VENDMASK) !=
	    (FLASH_MAN_INTEL & FLASH_VENDMASK)) {
		printf ("Can erase only Intel flash types - aborted\n");
		return 1;
	}

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

	if (prot) {
		printf ("- Warning: %d protected sectors will not be erased!\n",
			prot);
	} else {
		printf ("\n");
	}

	start = get_timer (0);
	last  = start;
	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			vu_long *addr = (vu_long *)(info->start[sect]);

			DEBUGF ("Erase sect %d @ 0x%08lX\n",
				sect, (ulong)addr);

			/* Disable interrupts which might cause a timeout
			 * here.
			 */
			flag = disable_interrupts();

			addr[0] = 0x00500050;	/* clear status register */
			addr[0] = 0x00200020;	/* erase setup */
			addr[0] = 0x00D000D0;	/* erase confirm */

			addr[1] = 0x00500050;	/* clear status register */
			addr[1] = 0x00200020;	/* erase setup */
			addr[1] = 0x00D000D0;	/* erase confirm */

			/* re-enable interrupts if necessary */
			if (flag)
				enable_interrupts();

			/* wait at least 80us - let's wait 1 ms */
			udelay (1000);

			while (((addr[0] & 0x00800080) != 0x00800080) ||
			       ((addr[1] & 0x00800080) != 0x00800080) ) {
				if ((now=get_timer(start)) >
					   CONFIG_SYS_FLASH_ERASE_TOUT) {
					printf ("Timeout\n");
					addr[0] = 0x00B000B0; /* suspend erase */
					addr[0] = 0x00FF00FF; /* to read mode  */
					return 1;
				}

				/* show that we're waiting */
				if ((now - last) > 1000) {  /* every second  */
					putc ('.');
					last = now;
				}
			}

			addr[0] = 0x00FF00FF;
		}
	}
	printf (" done\n");
	return 0;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 * 4 - Flash not identified
 */

#define	FLASH_WIDTH	8	/* flash bus width in bytes */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	ulong wp, cp, msr;
	int l, rc, i;
	ulong data[2];
	ulong *datah = &data[0];
	ulong *datal = &data[1];

	DEBUGF ("Flash write_buff: @ 0x%08lx, src 0x%08lx len %ld\n",
		addr, (ulong)src, cnt);

	if (info->flash_id == FLASH_UNKNOWN) {
		return 4;
	}

	msr = get_msr();
	set_msr(msr | MSR_FP);

	wp = (addr & ~(FLASH_WIDTH-1));	/* get lower aligned address */

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - wp) != 0) {
		*datah = *datal = 0;

		for (i = 0, cp = wp; i < l; i++, cp++) {
			if (i >= 4) {
				*datah = (*datah << 8) |
						((*datal & 0xFF000000) >> 24);
			}

			*datal = (*datal << 8) | (*(uchar *)cp);
		}
		for (; i < FLASH_WIDTH && cnt > 0; ++i) {
			char tmp;

			tmp = *src;

			src++;

			if (i >= 4) {
				*datah = (*datah << 8) |
						((*datal & 0xFF000000) >> 24);
			}

			*datal = (*datal << 8) | tmp;

			--cnt; ++cp;
		}

		for (; cnt == 0 && i < FLASH_WIDTH; ++i, ++cp) {
			if (i >= 4) {
				*datah = (*datah << 8) |
						((*datal & 0xFF000000) >> 24);
			}

			*datal = (*datah << 8) | (*(uchar *)cp);
		}

		if ((rc = write_data(info, wp, data)) != 0) {
			set_msr(msr);
			return (rc);
		}

		wp += FLASH_WIDTH;
	}

	/*
	 * handle FLASH_WIDTH aligned part
	 */
	while (cnt >= FLASH_WIDTH) {
		*datah = *(ulong *)src;
		*datal = *(ulong *)(src + 4);
		if ((rc = write_data(info, wp, data)) != 0) {
			set_msr(msr);
			return (rc);
		}
		wp  += FLASH_WIDTH;
		cnt -= FLASH_WIDTH;
		src += FLASH_WIDTH;
	}

	if (cnt == 0) {
		set_msr(msr);
		return (0);
	}

	/*
	 * handle unaligned tail bytes
	 */
	*datah = *datal = 0;
	for (i = 0, cp = wp; i < FLASH_WIDTH && cnt > 0; ++i, ++cp) {
		char tmp;

		tmp = *src;

		src++;

		if (i >= 4) {
			*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
		}

		*datal = (*datal << 8) | tmp;

		--cnt;
	}

	for (; i < FLASH_WIDTH; ++i, ++cp) {
		if (i >= 4) {
			*datah = (*datah << 8) | ((*datal & 0xFF000000) >> 24);
		}

		*datal = (*datal << 8) | (*(uchar *)cp);
	}

	rc = write_data(info, wp, data);
	set_msr(msr);

	return (rc);
}

/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_data (flash_info_t *info, ulong dest, ulong *data)
{
	vu_long *addr = (vu_long *)dest;
	ulong start;
	int flag;

	/* Check if Flash is (sufficiently) erased */
	if (((addr[0] & data[0]) != data[0]) ||
	    ((addr[1] & data[1]) != data[1]) ) {
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr[0] = 0x00400040;		/* write setup */
	write_via_fpu(addr, data);

	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts();

	start = get_timer (0);

	while (((addr[0] & 0x00800080) != 0x00800080) ||
	       ((addr[1] & 0x00800080) != 0x00800080) ) {
		if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
			addr[0] = 0x00FF00FF;	/* restore read mode */
			return (1);
		}
	}

	addr[0] = 0x00FF00FF;	/* restore read mode */

	return (0);
}

/*-----------------------------------------------------------------------
 */
static void write_via_fpu(vu_long *addr, ulong *data)
{
	__asm__ __volatile__ ("lfd  1, 0(%0)" : : "r" (data));
	__asm__ __volatile__ ("stfd 1, 0(%0)" : : "r" (addr));
}
/*-----------------------------------------------------------------------
 */
static __inline__ unsigned long get_msr(void)
{
    unsigned long msr;

    __asm__ __volatile__ ("mfmsr %0" : "=r" (msr) :);
    return msr;
}

static __inline__ void set_msr(unsigned long msr)
{
    __asm__ __volatile__ ("mtmsr %0" : : "r" (msr));
}