]> git.ipfire.org Git - people/ms/u-boot.git/blob - board/a3000/flash.c
rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / board / a3000 / flash.c
1 /*
2 * (C) Copyright 2001
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24
25 #include <common.h>
26 #include <mpc824x.h>
27
28 #if defined(CONFIG_ENV_IS_IN_FLASH)
29 # ifndef CONFIG_ENV_ADDR
30 # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
31 # endif
32 # ifndef CONFIG_ENV_SIZE
33 # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
34 # endif
35 # ifndef CONFIG_ENV_SECT_SIZE
36 # define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
37 # endif
38 #endif
39
40
41 /*---------------------------------------------------------------------*/
42 #define DEBUG_FLASH
43
44 #ifdef DEBUG_FLASH
45 #define DEBUGF(fmt,args...) printf(fmt ,##args)
46 #else
47 #define DEBUGF(fmt,args...)
48 #endif
49 /*---------------------------------------------------------------------*/
50
51 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
52
53 /*-----------------------------------------------------------------------
54 * Functions
55 */
56 static ulong flash_get_size (vu_char *addr, flash_info_t *info);
57 static int write_data (flash_info_t *info, uchar *dest, uchar data);
58 static void flash_get_offsets (ulong base, flash_info_t *info);
59
60 #define BS(b) (b)
61 #define BYTEME(x) ((x) & 0xFF)
62
63 /*-----------------------------------------------------------------------
64 */
65
66 unsigned long flash_init (void)
67 {
68 unsigned long flash_banks[CONFIG_SYS_MAX_FLASH_BANKS] = CONFIG_SYS_FLASH_BANKS;
69 unsigned long size, size_b[CONFIG_SYS_MAX_FLASH_BANKS];
70
71 int i;
72
73 /* Init: no FLASHes known */
74 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
75 {
76 flash_info[i].flash_id = FLASH_UNKNOWN;
77
78 DEBUGF("Get flash bank %d @ 0x%08lx\n", i, flash_banks[i]);
79 /*
80 size_b[i] = flash_get_size((vu_char *)flash_banks[i], &flash_info[i]);
81 */
82 size_b[i] = flash_get_size((vu_char *) 0xff800000 , &flash_info[i]);
83
84 if (flash_info[i].flash_id == FLASH_UNKNOWN)
85 {
86 printf ("## Unknown FLASH on Bank %d: "
87 "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
88 i, flash_info[i].flash_id,
89 size_b[i], size_b[i]<<20);
90 }
91 else
92 {
93 DEBUGF("## Flash bank %d at 0x%08lx sizes: 0x%08lx \n",
94 i, flash_banks[i], size_b[i]);
95
96 flash_get_offsets (flash_banks[i], &flash_info[i]);
97 flash_info[i].size = size_b[i];
98 }
99 }
100
101
102 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
103 DEBUGF("protect monitor %x @ %x\n", CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_LEN);
104 /* monitor protection ON by default */
105 flash_protect(FLAG_PROTECT_SET,
106 CONFIG_SYS_MONITOR_BASE,
107 CONFIG_SYS_MONITOR_BASE+CONFIG_SYS_MONITOR_LEN-1,
108 &flash_info[0]);
109 #endif
110
111 #ifdef CONFIG_ENV_IS_IN_FLASH
112 /* ENV protection ON by default */
113 DEBUGF("protect environtment %x @ %x\n", CONFIG_ENV_ADDR, CONFIG_ENV_SECT_SIZE);
114 flash_protect(FLAG_PROTECT_SET,
115 CONFIG_ENV_ADDR,
116 CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
117 &flash_info[0]);
118 #endif
119
120 size = 0;
121 DEBUGF("## Final Flash bank sizes: ");
122 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i)
123 {
124 DEBUGF("%08lx ", size_b[i]);
125 size += size_b[i];
126 }
127 DEBUGF("\n");
128 return (size);
129 }
130
131 /*-----------------------------------------------------------------------
132 */
133 static void flash_get_offsets (ulong base, flash_info_t *info)
134 {
135 int i;
136
137 if (info->flash_id == FLASH_UNKNOWN) {
138 return;
139 }
140
141 switch (info->flash_id & FLASH_VENDMASK) {
142 case FLASH_MAN_INTEL:
143 for (i = 0; i < info->sector_count; i++) {
144 info->start[i] = base;
145 base += 0x00020000; /* 128k per bank */
146 }
147 return;
148
149 default:
150 printf ("Don't know sector ofsets for flash type 0x%lx\n", info->flash_id);
151 return;
152 }
153 }
154
155 /*-----------------------------------------------------------------------
156 */
157 void flash_print_info (flash_info_t *info)
158 {
159 int i;
160
161 if (info->flash_id == FLASH_UNKNOWN) {
162 printf ("missing or unknown FLASH type\n");
163 return;
164 }
165
166 switch (info->flash_id & FLASH_VENDMASK) {
167 case FLASH_MAN_AMD: printf ("AMD "); break;
168 case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
169 case FLASH_MAN_SST: printf ("SST "); break;
170 case FLASH_MAN_STM: printf ("STM "); break;
171 case FLASH_MAN_INTEL: printf ("Intel "); break;
172 case FLASH_MAN_MT: printf ("MT "); break;
173 default: printf ("Unknown Vendor "); break;
174 }
175
176 switch (info->flash_id & FLASH_TYPEMASK) {
177 case FLASH_28F320J3A:
178 printf ("28F320J3A (32Mbit = 128K x 32)\n");
179 break;
180 case FLASH_28F640J3A:
181 printf ("28F640J3A (64Mbit = 128K x 64)\n");
182 break;
183 case FLASH_28F128J3A:
184 printf ("28F128J3A (128Mbit = 128K x 128)\n");
185 break;
186 default:
187 printf ("Unknown Chip Type\n");
188 break;
189 }
190
191 #if 1
192 if (info->size >= (1 << 20)) {
193 i = 20;
194 } else {
195 i = 10;
196 }
197 printf (" Size: %ld %cB in %d Sectors\n",
198 info->size >> i,
199 (i == 20) ? 'M' : 'k',
200 info->sector_count);
201
202 printf (" Sector Start Addresses:");
203 for (i=0; i<info->sector_count; ++i) {
204 if ((i % 5) == 0)
205 printf ("\n ");
206 printf (" %08lX%s",
207 info->start[i],
208 info->protect[i] ? " (RO)" : " "
209 );
210 }
211 printf ("\n");
212 #endif
213 return;
214 }
215
216 /*-----------------------------------------------------------------------
217 */
218
219
220 /*-----------------------------------------------------------------------
221 */
222
223 /*
224 * The following code cannot be run from FLASH!
225 */
226 static ulong flash_get_size (vu_char *addr, flash_info_t *info)
227 {
228 vu_char manuf, device;
229
230 addr[0] = BS(0x90);
231 manuf = BS(addr[0]);
232 DEBUGF("Manuf. ID @ 0x%08lx: 0x%08x\n", (ulong)addr, manuf);
233
234 switch (manuf) {
235 case BYTEME(AMD_MANUFACT):
236 info->flash_id = FLASH_MAN_AMD;
237 break;
238 case BYTEME(FUJ_MANUFACT):
239 info->flash_id = FLASH_MAN_FUJ;
240 break;
241 case BYTEME(SST_MANUFACT):
242 info->flash_id = FLASH_MAN_SST;
243 break;
244 case BYTEME(STM_MANUFACT):
245 info->flash_id = FLASH_MAN_STM;
246 break;
247 case BYTEME(INTEL_MANUFACT):
248 info->flash_id = FLASH_MAN_INTEL;
249 break;
250 default:
251 info->flash_id = FLASH_UNKNOWN;
252 info->sector_count = 0;
253 info->size = 0;
254 addr[0] = BS(0xFF); /* restore read mode, (yes, BS is a NOP) */
255 return 0; /* no or unknown flash */
256 }
257
258 device = BS(addr[2]); /* device ID */
259
260 DEBUGF("Device ID @ 0x%08lx: 0x%08x\n", (ulong)(&addr[1]), device);
261
262 switch (device) {
263 case BYTEME(INTEL_ID_28F320J3A):
264 info->flash_id += FLASH_28F320J3A;
265 info->sector_count = 32;
266 info->size = 0x00400000;
267 break; /* => 4 MB */
268
269 case BYTEME(INTEL_ID_28F640J3A):
270 info->flash_id += FLASH_28F640J3A;
271 info->sector_count = 64;
272 info->size = 0x00800000;
273 break; /* => 8 MB */
274
275 case BYTEME(INTEL_ID_28F128J3A):
276 info->flash_id += FLASH_28F128J3A;
277 info->sector_count = 128;
278 info->size = 0x01000000;
279 break; /* => 16 MB */
280
281 default:
282 info->flash_id = FLASH_UNKNOWN;
283 addr[0] = BS(0xFF); /* restore read mode (yes, a NOP) */
284 return 0; /* => no or unknown flash */
285
286 }
287
288 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
289 printf ("** ERROR: sector count %d > max (%d) **\n",
290 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
291 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
292 }
293
294 addr[0] = BS(0xFF); /* restore read mode */
295
296 return (info->size);
297 }
298
299
300 /*-----------------------------------------------------------------------
301 */
302
303 int flash_erase (flash_info_t *info, int s_first, int s_last)
304 {
305 int flag, prot, sect;
306 ulong start, now, last;
307
308 if ((s_first < 0) || (s_first > s_last)) {
309 if (info->flash_id == FLASH_UNKNOWN) {
310 printf ("- missing\n");
311 } else {
312 printf ("- no sectors to erase\n");
313 }
314 return 1;
315 }
316
317 if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
318 printf ("Can erase only Intel flash types - aborted\n");
319 return 1;
320 }
321
322 prot = 0;
323 for (sect=s_first; sect<=s_last; ++sect) {
324 if (info->protect[sect]) {
325 prot++;
326 }
327 }
328
329 if (prot) {
330 printf ("- Warning: %d protected sectors will not be erased!\n", prot);
331 } else {
332 printf ("\n");
333 }
334
335 start = get_timer (0);
336 last = start;
337 /* Start erase on unprotected sectors */
338 for (sect = s_first; sect<=s_last; sect++) {
339 if (info->protect[sect] == 0) { /* not protected */
340 vu_char *addr = (vu_char *)(info->start[sect]);
341 unsigned long status;
342
343 /* Disable interrupts which might cause a timeout here */
344 flag = disable_interrupts();
345
346 *addr = BS(0x50); /* clear status register */
347 *addr = BS(0x20); /* erase setup */
348 *addr = BS(0xD0); /* erase confirm */
349
350 /* re-enable interrupts if necessary */
351 if (flag) {
352 enable_interrupts();
353 }
354
355 /* wait at least 80us - let's wait 1 ms */
356 udelay (1000);
357
358 while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
359 if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
360 printf ("Timeout\n");
361 *addr = BS(0xB0); /* suspend erase */
362 *addr = BS(0xFF); /* reset to read mode */
363 return 1;
364 }
365
366 /* show that we're waiting */
367 if ((now - last) > 1000) { /* every second */
368 putc ('.');
369 last = now;
370 }
371 }
372
373 *addr = BS(0xFF); /* reset to read mode */
374 }
375 }
376 printf (" done\n");
377 return 0;
378 }
379
380 /*-----------------------------------------------------------------------
381 * Copy memory to flash, returns:
382 * 0 - OK
383 * 1 - write timeout
384 * 2 - Flash not erased
385 * 4 - Flash not identified
386 */
387
388 #define FLASH_WIDTH 1 /* flash bus width in bytes */
389
390 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
391 {
392 uchar *wp = (uchar *)addr;
393 int rc;
394
395 if (info->flash_id == FLASH_UNKNOWN) {
396 return 4;
397 }
398
399 while (cnt > 0) {
400 if ((rc = write_data(info, wp, *src)) != 0) {
401 return rc;
402 }
403 wp++;
404 src++;
405 cnt--;
406 }
407
408 return cnt;
409 }
410
411 /*-----------------------------------------------------------------------
412 * Write a word to Flash, returns:
413 * 0 - OK
414 * 1 - write timeout
415 * 2 - Flash not erased
416 */
417 static int write_data (flash_info_t *info, uchar *dest, uchar data)
418 {
419 vu_char *addr = (vu_char *)dest;
420 ulong status;
421 ulong start;
422 int flag;
423
424 /* Check if Flash is (sufficiently) erased */
425 if ((BS(*addr) & data) != data) {
426 return 2;
427 }
428 /* Disable interrupts which might cause a timeout here */
429 flag = disable_interrupts();
430
431 *addr = BS(0x40); /* write setup */
432 *addr = data;
433
434 /* re-enable interrupts if necessary */
435 if (flag) {
436 enable_interrupts();
437 }
438
439 start = get_timer (0);
440
441 while (((status = BS(*addr)) & BYTEME(0x00800080)) != BYTEME(0x00800080)) {
442 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
443 *addr = BS(0xFF); /* restore read mode */
444 return 1;
445 }
446 }
447
448 *addr = BS(0xFF); /* restore read mode */
449
450 return 0;
451 }
452
453 /*-----------------------------------------------------------------------
454 */