summaryrefslogtreecommitdiff
path: root/board/BuS/EB+MCF-EV123/flash.c
blob: a5d621c44ae85df0715e2443912200d9185d30ad (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
/*
 * (C) Copyright 2005 
 * BuS Elektronik GmbH & Co.KG <esw@bus-elektonik.de>
 * 
 * Based On
 * 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  "cfm_flash.h"

#define PHYS_FLASH_1 CFG_FLASH_BASE
#define FLASH_BANK_SIZE 0x200000

flash_info_t flash_info[CFG_MAX_FLASH_BANKS];

void flash_print_info (flash_info_t * info)
{
	int i;

	switch (info->flash_id & FLASH_VENDMASK) {
	case (AMD_MANUFACT & FLASH_VENDMASK):
		printf ("AMD: ");
		switch (info->flash_id & FLASH_TYPEMASK) {
		case (AMD_ID_LV160B & FLASH_TYPEMASK):
			printf ("AM29LV160B (16Bit)\n");
			break;
		default:
			printf ("Unknown Chip Type\n");
			break;
		}
		break;
	case FREESCALE_MANUFACT & FLASH_VENDMASK:
		cfm_flash_print_info (info);
		break;
	default:
		printf ("Unknown Vendor ");
		break;
	}

	puts ("  Size: ");
	if ((info->size >> 20) > 0)
	{
		printf ("%ld MiB",info->size >> 20);
	}
	else
	{
		printf ("%ld KiB",info->size >> 10);
	}
	printf (" in %d Sectors\n", info->sector_count);

	printf ("  Sector Start Addresses:");
	for (i = 0; i < info->sector_count; i++) {
		if ((i % 4) == 0) {
			printf ("\n    ");
		}
		printf ("%02d: %08lX%s  ", i,info->start[i],
			info->protect[i] ? " P" : "  ");
	}
	printf ("\n\n");
}

unsigned long flash_init (void)
{
	int i, j;
	ulong size = 0;

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

		switch (i)
		{
		case 1:
			flash_info[i].flash_id =
				(AMD_MANUFACT & FLASH_VENDMASK) |
				(AMD_ID_LV160B & 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);
			flashbase = PHYS_FLASH_1;
			for (j = 0; j < flash_info[i].sector_count; j++) {
				if (j == 0) {
					/* 1st is 16 KiB */
					flash_info[i].start[j] = flashbase;
				}
				if ((j >= 1) && (j <= 2)) {
				/* 2nd and 3rd are 8 KiB */
					flash_info[i].start[j] =
						flashbase + 0x4000 + 0x2000 * (j - 1);
				}
				if (j == 3) {
					/* 4th is 32 KiB */
					flash_info[i].start[j] = flashbase + 0x8000;
				}
				if ((j >= 4) && (j <= 34)) {
					/* rest is 256 KiB */
					flash_info[i].start[j] =
						flashbase + 0x10000 + 0x10000 * (j - 4);
				}
			}
			break;
		case 0:
			cfm_flash_init (&flash_info[i]);
			break;
		default:
			panic ("configured to many flash banks!\n");
		}

		size += flash_info[i].size;
	}

	flash_protect (FLAG_PROTECT_SET,
		       CFG_FLASH_BASE,
		       CFG_FLASH_BASE + 0xffff, &flash_info[0]);

	return size;
}

#define CMD_READ_ARRAY		0x00F0
#define CMD_UNLOCK1		0x00AA
#define CMD_UNLOCK2		0x0055
#define CMD_ERASE_SETUP		0x0080
#define CMD_ERASE_CONFIRM	0x0030
#define CMD_PROGRAM		0x00A0
#define CMD_UNLOCK_BYPASS	0x0020

#define MEM_FLASH_ADDR1		(*(volatile u16 *)(info->start[0] + (0x00000555<<1)))
#define MEM_FLASH_ADDR2		(*(volatile u16 *)(info->start[0] + (0x000002AA<<1)))


#define BIT_ERASE_DONE		0x0080
#define BIT_RDY_MASK		0x0080
#define BIT_PROGRAM_ERROR	0x0020
#define BIT_TIMEOUT		0x80000000	/* our flag */

#define ERR_READY -1

int amd_flash_erase_sector(flash_info_t * info, int sector)
{
	int state;
	ulong result;

	volatile u16 *addr =
				(volatile u16 *) (info->start[sector]);

	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;

	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	*addr = CMD_ERASE_CONFIRM;

	/* wait until flash is ready */
	state = 0;
	set_timer (0);

	do {
		result = *addr;

		/* check timeout */
		if (get_timer (0) > CFG_FLASH_ERASE_TOUT) {
			MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
			state = ERR_TIMOUT;
		}

		if (!state && (result & 0xFFFF) & BIT_ERASE_DONE)
			state = ERR_READY;
	}
	while (!state);
	if (state == ERR_READY)
		state = ERR_OK;

	MEM_FLASH_ADDR1 = CMD_READ_ARRAY;

	return state;
}

int flash_erase (flash_info_t * info, int s_first, int s_last)
{
	int iflag, cflag;
	int sector;
	int rc;

	rc = ERR_OK;

	if (info->flash_id == FLASH_UNKNOWN)
	{
		rc = ERR_UNKNOWN_FLASH_TYPE;
	} /* (info->flash_id == FLASH_UNKNOWN) */

	if ((s_first < 0) || (s_first > s_last) || s_last >= info->sector_count)
	{
		rc = ERR_INVAL;
	}

	cflag = icache_status ();
	icache_disable ();
	iflag = disable_interrupts ();

	for (sector = s_first; (sector <= s_last) && (rc == ERR_OK); sector++) {

		if (info->protect[sector])
		{
			putc('P'); /*  protected sector will not erase */
		}
		else
		{
			/* erase on unprotected sector */
			puts("E\b");
			switch (info->flash_id & FLASH_VENDMASK)
			{
			case (AMD_MANUFACT & FLASH_VENDMASK):
				rc = amd_flash_erase_sector(info,sector);
				break;
			case (FREESCALE_MANUFACT & FLASH_VENDMASK):
				rc = cfm_flash_erase_sector(info,sector);
				break;
			default:
				return ERR_UNKNOWN_FLASH_VENDOR;
			}
			putc('.');
		}
	}
	if (rc!=ERR_OK)
	{
		printf ("\n   ");
		flash_perror (rc);
	}
	else
	{
		printf (" done\n");
	}

	udelay (10000);	/* allow flash to settle - wait 10 ms */

	if (iflag)
		enable_interrupts ();

	if (cflag)
  		icache_enable ();

	return rc;
}

volatile static int amd_write_word (flash_info_t * info, ulong dest, u16 data)
{
	volatile u16 *addr;
	ulong result;
	int cflag, iflag;
	int state;

	/*
	 * Check if Flash is (sufficiently) erased
	 */
	addr = (volatile u16 *) dest;

	result = *addr;
	if ((result & 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.
	 */

	cflag = icache_status ();
	icache_disable ();
	iflag = disable_interrupts ();

	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	MEM_FLASH_ADDR1 = CMD_PROGRAM;
	*addr = data;

	/* arm simple, non interrupt dependent timer */
	set_timer (0);

	/* wait until flash is ready */
	state = 0;
	do {
		result = *addr;

		/* check timeout */
		if (get_timer (0) > CFG_FLASH_ERASE_TOUT) {
				state = ERR_TIMOUT;
		}
		if (!state && ((result & BIT_RDY_MASK) == (data & BIT_RDY_MASK)))
			state = ERR_READY;

	} while (!state);

	*addr = CMD_READ_ARRAY;

	if (state == ERR_READY)
		state = ERR_OK;
	if ((*addr != data) && (state != ERR_TIMOUT))
		state = ERR_PROG_ERROR;

	if (iflag)
		enable_interrupts ();

	if (cflag)
		icache_enable ();

	return state;
}

int amd_flash_write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
	int rc;
	ulong dest;
	u16 data;

	rc = ERR_OK;
	if (addr & 1)
	{
		debug ("Byte alignment not supported\n");
		rc = ERR_ALIGN;
	}
	if (cnt & 1)
	{
		debug ("Byte transfer not supported\n");
		rc = ERR_ALIGN;
	}

	dest = addr;
	while ((cnt>=2) && (rc == ERR_OK))
	{
		data =*((volatile u16 *) src);
		rc=amd_write_word (info,dest,data);
		src +=2;
		dest +=2;
		cnt -=2;
	}
	return rc;
}

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

	switch (info->flash_id & FLASH_VENDMASK)
	{
		case (AMD_MANUFACT & FLASH_VENDMASK):
			rc = amd_flash_write_buff(info,src,addr,cnt);
			break;
		case (FREESCALE_MANUFACT & FLASH_VENDMASK):
			rc = cfm_flash_write_buff(info,src,addr,cnt);
			break;
		default:
			rc = ERR_UNKNOWN_FLASH_VENDOR;
	}
	return rc;

}
int amd_flash_protect(flash_info_t * info,long sector,int prot)
{
	int rc;
	rc= ERR_OK;
	if (prot)
	{
		info->protect[sector]=1;
	}
	else
	{
		info->protect[sector]=0;
	}
	return rc;
}

#ifdef CFG_FLASH_PROTECTION

int flash_real_protect(flash_info_t * info,long sector,int prot)
{
	int rc;

	switch (info->flash_id & FLASH_VENDMASK)
	{
		case (AMD_MANUFACT & FLASH_VENDMASK):
			rc = amd_flash_protect(info,sector,prot);
			break;
		case (FREESCALE_MANUFACT & FLASH_VENDMASK):
			rc = cfm_flash_protect(info,sector,prot);
			break;
		default:
			rc = ERR_UNKNOWN_FLASH_VENDOR;
	}
	return rc;
}

#endif