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TsiChung Liew6d33c6a2008-07-23 17:11:47 -05001/*
2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
27#include <common.h>
28
29#include <asm/immap.h>
30
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020031#ifndef CONFIG_SYS_FLASH_CFI
TsiChung Liew6d33c6a2008-07-23 17:11:47 -050032typedef unsigned short FLASH_PORT_WIDTH;
33typedef volatile unsigned short FLASH_PORT_WIDTHV;
34
35#define FPW FLASH_PORT_WIDTH
36#define FPWV FLASH_PORT_WIDTHV
37
38#define FLASH_CYCLE1 0x5555
39#define FLASH_CYCLE2 0x2aaa
40
41#define SYNC __asm__("nop")
42
43/*-----------------------------------------------------------------------
44 * Functions
45 */
46
47ulong flash_get_size(FPWV * addr, flash_info_t * info);
48int flash_get_offsets(ulong base, flash_info_t * info);
49int write_word(flash_info_t * info, FPWV * dest, u16 data);
50void inline spin_wheel(void);
51
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020052flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
TsiChung Liew6d33c6a2008-07-23 17:11:47 -050053
54ulong flash_init(void)
55{
56 ulong size = 0;
57 ulong fbase = 0;
58
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020059 fbase = (ulong) CONFIG_SYS_FLASH_BASE;
TsiChung Liew6d33c6a2008-07-23 17:11:47 -050060 flash_get_size((FPWV *) fbase, &flash_info[0]);
61 flash_get_offsets((ulong) fbase, &flash_info[0]);
62 fbase += flash_info[0].size;
63 size += flash_info[0].size;
64
65 /* Protect monitor and environment sectors */
66 flash_protect(FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020067 CONFIG_SYS_MONITOR_BASE,
68 CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
TsiChung Liew6d33c6a2008-07-23 17:11:47 -050069
70 return size;
71}
72
73int flash_get_offsets(ulong base, flash_info_t * info)
74{
75 int j, k;
76
77 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
78
79 info->start[0] = base;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020080 for (k = 0, j = 0; j < CONFIG_SYS_SST_SECT; j++, k++) {
81 info->start[k + 1] = info->start[k] + CONFIG_SYS_SST_SECTSZ;
TsiChung Liew6d33c6a2008-07-23 17:11:47 -050082 info->protect[k] = 0;
83 }
84 }
85
86 return ERR_OK;
87}
88
89void flash_print_info(flash_info_t * info)
90{
91 int i;
92
93 switch (info->flash_id & FLASH_VENDMASK) {
94 case FLASH_MAN_SST:
95 printf("SST ");
96 break;
97 default:
98 printf("Unknown Vendor ");
99 break;
100 }
101
102 switch (info->flash_id & FLASH_TYPEMASK) {
103 case FLASH_SST6401B:
104 printf("SST39VF6401B\n");
105 break;
106 default:
107 printf("Unknown Chip Type\n");
108 return;
109 }
110
111 if (info->size > 0x100000) {
112 int remainder;
113
114 printf(" Size: %ld", info->size >> 20);
115
116 remainder = (info->size % 0x100000);
117 if (remainder) {
118 remainder >>= 10;
119 remainder = (int)((float)
120 (((float)remainder / (float)1024) *
121 10000));
122 printf(".%d ", remainder);
123 }
124
125 printf("MB in %d Sectors\n", info->sector_count);
126 } else
127 printf(" Size: %ld KB in %d Sectors\n",
128 info->size >> 10, info->sector_count);
129
130 printf(" Sector Start Addresses:");
131 for (i = 0; i < info->sector_count; ++i) {
132 if ((i % 5) == 0)
133 printf("\n ");
134 printf(" %08lX%s",
135 info->start[i], info->protect[i] ? " (RO)" : " ");
136 }
137 printf("\n");
138}
139
140/*
141 * The following code cannot be run from FLASH!
142 */
143ulong flash_get_size(FPWV * addr, flash_info_t * info)
144{
145 u16 value;
146
147 addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
148 addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
149 addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
150
151 switch (addr[0] & 0xffff) {
152 case (u8) SST_MANUFACT:
153 info->flash_id = FLASH_MAN_SST;
154 value = addr[1];
155 break;
156 default:
157 printf("Unknown Flash\n");
158 info->flash_id = FLASH_UNKNOWN;
159 info->sector_count = 0;
160 info->size = 0;
161
162 *addr = (FPW) 0x00F000F0;
163 return (0); /* no or unknown flash */
164 }
165
166 switch (value) {
167 case (u16) SST_ID_xF6401B:
168 info->flash_id += FLASH_SST6401B;
169 break;
170 default:
171 info->flash_id = FLASH_UNKNOWN;
172 break;
173 }
174
175 info->sector_count = 0;
176 info->size = 0;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200177 info->sector_count = CONFIG_SYS_SST_SECT;
178 info->size = CONFIG_SYS_SST_SECT * CONFIG_SYS_SST_SECTSZ;
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500179
180 /* reset ID mode */
181 *addr = (FPWV) 0x00F000F0;
182
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200183 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500184 printf("** ERROR: sector count %d > max (%d) **\n",
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200185 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
186 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500187 }
188
189 return (info->size);
190}
191
192int flash_erase(flash_info_t * info, int s_first, int s_last)
193{
194 FPWV *addr;
195 int flag, prot, sect, count;
196 ulong type, start, last;
197 int rcode = 0, flashtype = 0;
198
199 if ((s_first < 0) || (s_first > s_last)) {
200 if (info->flash_id == FLASH_UNKNOWN)
201 printf("- missing\n");
202 else
203 printf("- no sectors to erase\n");
204 return 1;
205 }
206
207 type = (info->flash_id & FLASH_VENDMASK);
208
209 switch (type) {
210 case FLASH_MAN_SST:
211 flashtype = 1;
212 break;
213 default:
214 type = (info->flash_id & FLASH_VENDMASK);
215 printf("Can't erase unknown flash type %08lx - aborted\n",
216 info->flash_id);
217 return 1;
218 }
219
220 prot = 0;
221 for (sect = s_first; sect <= s_last; ++sect) {
222 if (info->protect[sect]) {
223 prot++;
224 }
225 }
226
227 if (prot)
228 printf("- Warning: %d protected sectors will not be erased!\n",
229 prot);
230 else
231 printf("\n");
232
233 flag = disable_interrupts();
234
235 start = get_timer(0);
236 last = start;
237
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200238 if ((s_last - s_first) == (CONFIG_SYS_SST_SECT - 1)) {
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500239 if (prot == 0) {
240 addr = (FPWV *) info->start[0];
241
242 addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
243 addr[FLASH_CYCLE2] = 0x0055; /* unlock */
244 addr[FLASH_CYCLE1] = 0x0080; /* erase mode */
245 addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
246 addr[FLASH_CYCLE2] = 0x0055; /* unlock */
247 *addr = 0x0030; /* erase chip */
248
249 count = 0;
250 start = get_timer(0);
251
252 while ((*addr & 0x0080) != 0x0080) {
253 if (count++ > 0x10000) {
254 spin_wheel();
255 count = 0;
256 }
257
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200258 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500259 printf("Timeout\n");
260 *addr = 0x00F0; /* reset to read mode */
261
262 return 1;
263 }
264 }
265
266 *addr = 0x00F0; /* reset to read mode */
267
268 printf("\b. done\n");
269
270 if (flag)
271 enable_interrupts();
272
273 return 0;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200274 } else if (prot == CONFIG_SYS_SST_SECT) {
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500275 return 1;
276 }
277 }
278
279 /* Start erase on unprotected sectors */
280 for (sect = s_first; sect <= s_last; sect++) {
281 if (info->protect[sect] == 0) { /* not protected */
282
283 addr = (FPWV *) (info->start[sect]);
284
285 printf(".");
286
287 /* arm simple, non interrupt dependent timer */
288 start = get_timer(0);
289
290 switch (flashtype) {
291 case 1:
292 {
293 FPWV *base; /* first address in bank */
294
295 flag = disable_interrupts();
296
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200297 base = (FPWV *) (CONFIG_SYS_FLASH_BASE); /* First sector */
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500298
299 base[FLASH_CYCLE1] = 0x00AA; /* unlock */
300 base[FLASH_CYCLE2] = 0x0055; /* unlock */
301 base[FLASH_CYCLE1] = 0x0080; /* erase mode */
302 base[FLASH_CYCLE1] = 0x00AA; /* unlock */
303 base[FLASH_CYCLE2] = 0x0055; /* unlock */
304 *addr = 0x0050; /* erase sector */
305
306 if (flag)
307 enable_interrupts();
308
309 while ((*addr & 0x0080) != 0x0080) {
310 if (get_timer(start) >
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200311 CONFIG_SYS_FLASH_ERASE_TOUT) {
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500312 printf("Timeout\n");
313 *addr = 0x00F0; /* reset to read mode */
314
315 rcode = 1;
316 break;
317 }
318 }
319
320 *addr = 0x00F0; /* reset to read mode */
321 break;
322 }
323 } /* switch (flashtype) */
324 }
325 }
326 printf(" done\n");
327
328 if (flag)
329 enable_interrupts();
330
331 return rcode;
332}
333
334int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
335{
336 ulong wp, count;
337 u16 data;
338 int rc, port_width;
339
340 if (info->flash_id == FLASH_UNKNOWN)
341 return 4;
342
343 /* get lower word aligned address */
344 wp = addr;
345 port_width = sizeof(FPW);
346
347 /* handle unaligned start bytes */
348 if (wp & 1) {
349 data = *((FPWV *) wp);
350 data = (data << 8) | *src;
351
352 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
353 return (rc);
354
355 wp++;
356 cnt -= 1;
357 src++;
358 }
359
360 while (cnt >= 2) {
361 /*
362 * handle word aligned part
363 */
364 count = 0;
365 data = *((FPWV *) src);
366
367 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
368 return (rc);
369
370 wp += 2;
371 src += 2;
372 cnt -= 2;
373
374 if (count++ > 0x800) {
375 spin_wheel();
376 count = 0;
377 }
378 }
379 /* handle word aligned part */
380 if (cnt) {
381 /* handle word aligned part */
382 count = 0;
383 data = *((FPWV *) wp);
384
385 data = (data & 0x00FF) | (*src << 8);
386
387 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
388 return (rc);
389
390 wp++;
391 src++;
392 cnt -= 1;
393 if (count++ > 0x800) {
394 spin_wheel();
395 count = 0;
396 }
397 }
398
399 if (cnt == 0)
400 return ERR_OK;
401
402 return ERR_OK;
403}
404
405/*-----------------------------------------------------------------------
406 * Write a word to Flash
407 * A word is 16 bits, whichever the bus width of the flash bank
408 * (not an individual chip) is.
409 *
410 * returns:
411 * 0 - OK
412 * 1 - write timeout
413 * 2 - Flash not erased
414 */
415int write_word(flash_info_t * info, FPWV * dest, u16 data)
416{
417 ulong start;
418 int flag;
419 int res = 0; /* result, assume success */
420 FPWV *base; /* first address in flash bank */
421
422 /* Check if Flash is (sufficiently) erased */
423 if ((*dest & (u8) data) != (u8) data) {
424 return (2);
425 }
426
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200427 base = (FPWV *) (CONFIG_SYS_FLASH_BASE);
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500428
429 /* Disable interrupts which might cause a timeout here */
430 flag = disable_interrupts();
431
432 base[FLASH_CYCLE1] = (u8) 0x00AA00AA; /* unlock */
433 base[FLASH_CYCLE2] = (u8) 0x00550055; /* unlock */
434 base[FLASH_CYCLE1] = (u8) 0x00A000A0; /* selects program mode */
435
436 *dest = data; /* start programming the data */
437
438 /* re-enable interrupts if necessary */
439 if (flag)
440 enable_interrupts();
441
442 start = get_timer(0);
443
444 /* data polling for D7 */
445 while (res == 0
446 && (*dest & (u8) 0x00800080) != (data & (u8) 0x00800080)) {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200447 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
TsiChung Liew6d33c6a2008-07-23 17:11:47 -0500448 *dest = (u8) 0x00F000F0; /* reset bank */
449 res = 1;
450 }
451 }
452
453 *dest++ = (u8) 0x00F000F0; /* reset bank */
454
455 return (res);
456}
457
458void inline spin_wheel(void)
459{
460 static int p = 0;
461 static char w[] = "\\/-";
462
463 printf("\010%c", w[p]);
464 (++p == 3) ? (p = 0) : 0;
465}
466
467#endif