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5b1d7137 WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. | |
4 | * | |
5 | * (C) Copyright 2002 | |
6 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
7 | * | |
8 | * Adapted for Interphase 4539 by Wolfgang Grandegger <wg@denx.de>. | |
9 | * | |
10 | * See file CREDITS for list of people who contributed to this | |
11 | * project. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License as | |
15 | * published by the Free Software Foundation; either version 2 of | |
16 | * the License, or (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
26 | * MA 02111-1307 USA | |
27 | */ | |
28 | ||
29 | #include <config.h> | |
30 | #include <common.h> | |
31 | #include <flash.h> | |
32 | #include <asm/io.h> | |
33 | ||
34 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; | |
35 | ||
36 | extern int hwc_flash_size(void); | |
37 | static ulong flash_get_size (u32 addr, flash_info_t *info); | |
38 | static int flash_get_offsets (u32 base, flash_info_t *info); | |
39 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
40 | static void flash_reset (u32 addr); | |
41 | ||
42 | #define out8(a,v) *(volatile unsigned char*)(a) = v | |
43 | #define in8(a) *(volatile unsigned char*)(a) | |
44 | #define in32(a) *(volatile unsigned long*)(a) | |
45 | #define iobarrier_rw() eieio() | |
46 | ||
47 | unsigned long flash_init (void) | |
48 | { | |
49 | unsigned int i; | |
50 | unsigned long flash_size = 0; | |
51 | unsigned long bank_size; | |
52 | unsigned int bank = 0; | |
53 | ||
54 | /* Init: no FLASHes known */ | |
55 | for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) { | |
56 | flash_info[i].flash_id = FLASH_UNKNOWN; | |
57 | flash_info[i].sector_count = 0; | |
58 | flash_info[i].size = 0; | |
59 | } | |
60 | ||
61 | /* Initialise the BOOT Flash */ | |
62 | if (bank == CFG_MAX_FLASH_BANKS) { | |
63 | puts ("Warning: not all Flashes are initialised !"); | |
64 | return flash_size; | |
65 | } | |
66 | ||
67 | bank_size = flash_get_size (CFG_FLASH_BASE, flash_info + bank); | |
68 | if (bank_size) { | |
69 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE && \ | |
70 | CFG_MONITOR_BASE < CFG_FLASH_BASE + CFG_MAX_FLASH_SIZE | |
71 | /* monitor protection ON by default */ | |
72 | flash_protect(FLAG_PROTECT_SET, | |
73 | CFG_MONITOR_BASE, | |
74 | CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, | |
75 | flash_info + bank); | |
76 | #endif | |
77 | ||
78 | #ifdef CFG_ENV_IS_IN_FLASH | |
79 | /* ENV protection ON by default */ | |
80 | flash_protect(FLAG_PROTECT_SET, | |
81 | CFG_ENV_ADDR, | |
82 | CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1, | |
83 | flash_info + bank); | |
84 | #endif | |
85 | ||
86 | /* HWC protection ON by default */ | |
87 | flash_protect(FLAG_PROTECT_SET, | |
88 | CFG_FLASH_BASE, | |
89 | CFG_FLASH_BASE + 0x10000 - 1, | |
90 | flash_info + bank); | |
91 | ||
92 | flash_size += bank_size; | |
93 | bank++; | |
94 | } else { | |
95 | puts ("Warning: the BOOT Flash is not initialised !"); | |
96 | } | |
97 | ||
98 | return flash_size; | |
99 | } | |
100 | ||
101 | /* | |
102 | * The following code cannot be run from FLASH! | |
103 | */ | |
104 | static ulong flash_get_size (u32 addr, flash_info_t *info) | |
105 | { | |
106 | volatile uchar value; | |
107 | #if 0 | |
108 | int i; | |
109 | #endif | |
110 | ||
111 | /* Write auto select command: read Manufacturer ID */ | |
112 | out8(addr + 0x0555, 0xAA); | |
113 | iobarrier_rw(); | |
114 | udelay(10); | |
115 | out8(addr + 0x02AA, 0x55); | |
116 | iobarrier_rw(); | |
117 | udelay(10); | |
118 | out8(addr + 0x0555, 0x90); | |
119 | iobarrier_rw(); | |
120 | udelay(10); | |
121 | ||
122 | value = in8(addr); | |
123 | iobarrier_rw(); | |
124 | udelay(10); | |
125 | switch (value | (value << 16)) { | |
126 | case AMD_MANUFACT: | |
127 | info->flash_id = FLASH_MAN_AMD; | |
128 | break; | |
129 | ||
130 | case FUJ_MANUFACT: | |
131 | info->flash_id = FLASH_MAN_FUJ; | |
132 | break; | |
133 | ||
134 | default: | |
135 | info->flash_id = FLASH_UNKNOWN; | |
136 | flash_reset (addr); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | value = in8(addr + 1); /* device ID */ | |
141 | iobarrier_rw(); | |
142 | ||
143 | switch (value) { | |
144 | case AMD_ID_LV033C: | |
145 | info->flash_id += FLASH_AM033C; | |
146 | info->size = hwc_flash_size(); | |
147 | if (info->size > CFG_MAX_FLASH_SIZE) { | |
148 | printf("U-Boot supports only %d MB\n", | |
149 | CFG_MAX_FLASH_SIZE); | |
150 | info->size = CFG_MAX_FLASH_SIZE; | |
151 | } | |
152 | info->sector_count = info->size / 0x10000; | |
153 | break; /* => 4 MB */ | |
154 | ||
155 | default: | |
156 | info->flash_id = FLASH_UNKNOWN; | |
157 | flash_reset (addr); | |
158 | return (0); /* => no or unknown flash */ | |
159 | ||
160 | } | |
161 | ||
162 | if (!flash_get_offsets (addr, info)) { | |
163 | flash_reset (addr); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | #if 0 | |
168 | /* check for protected sectors */ | |
169 | for (i = 0; i < info->sector_count; i++) { | |
170 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
171 | /* D0 = 1 if protected */ | |
172 | value = in8(info->start[i] + 2); | |
173 | iobarrier_rw(); | |
174 | info->protect[i] = (value & 1) != 0; | |
175 | } | |
176 | #endif | |
177 | ||
178 | /* | |
179 | * Reset bank to read mode | |
180 | */ | |
181 | flash_reset (addr); | |
182 | ||
183 | return (info->size); | |
184 | } | |
185 | ||
186 | static int flash_get_offsets (u32 base, flash_info_t *info) | |
187 | { | |
188 | unsigned int i, size; | |
189 | ||
190 | switch (info->flash_id & FLASH_TYPEMASK) { | |
191 | case FLASH_AM033C: | |
192 | /* set sector offsets for uniform sector type */ | |
193 | size = info->size / info->sector_count; | |
194 | for (i = 0; i < info->sector_count; i++) { | |
195 | info->start[i] = base + i * size; | |
196 | } | |
197 | break; | |
198 | default: | |
199 | return 0; | |
200 | } | |
201 | ||
202 | return 1; | |
203 | } | |
204 | ||
205 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
206 | { | |
207 | volatile u32 addr = info->start[0]; | |
208 | int flag, prot, sect, l_sect; | |
209 | ulong start, now, last; | |
210 | ||
211 | if (s_first < 0 || s_first > s_last) { | |
212 | if (info->flash_id == FLASH_UNKNOWN) { | |
213 | printf ("- missing\n"); | |
214 | } else { | |
215 | printf ("- no sectors to erase\n"); | |
216 | } | |
217 | return 1; | |
218 | } | |
219 | ||
220 | if (info->flash_id == FLASH_UNKNOWN || | |
221 | info->flash_id > FLASH_AMD_COMP) { | |
222 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
223 | info->flash_id); | |
224 | return 1; | |
225 | } | |
226 | ||
227 | prot = 0; | |
228 | for (sect=s_first; sect<=s_last; ++sect) { | |
229 | if (info->protect[sect]) { | |
230 | prot++; | |
231 | } | |
232 | } | |
233 | ||
234 | if (prot) { | |
235 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
236 | prot); | |
237 | } else { | |
238 | printf ("\n"); | |
239 | } | |
240 | ||
241 | l_sect = -1; | |
242 | ||
243 | /* Disable interrupts which might cause a timeout here */ | |
244 | flag = disable_interrupts(); | |
245 | ||
246 | out8(addr + 0x555, 0xAA); | |
247 | iobarrier_rw(); | |
248 | out8(addr + 0x2AA, 0x55); | |
249 | iobarrier_rw(); | |
250 | out8(addr + 0x555, 0x80); | |
251 | iobarrier_rw(); | |
252 | out8(addr + 0x555, 0xAA); | |
253 | iobarrier_rw(); | |
254 | out8(addr + 0x2AA, 0x55); | |
255 | iobarrier_rw(); | |
256 | ||
257 | /* Start erase on unprotected sectors */ | |
258 | for (sect = s_first; sect<=s_last; sect++) { | |
259 | if (info->protect[sect] == 0) { /* not protected */ | |
260 | addr = info->start[sect]; | |
261 | out8(addr, 0x30); | |
262 | iobarrier_rw(); | |
263 | l_sect = sect; | |
264 | } | |
265 | } | |
266 | ||
267 | /* re-enable interrupts if necessary */ | |
268 | if (flag) | |
269 | enable_interrupts(); | |
270 | ||
271 | /* wait at least 80us - let's wait 1 ms */ | |
272 | udelay (1000); | |
273 | ||
274 | /* | |
275 | * We wait for the last triggered sector | |
276 | */ | |
277 | if (l_sect < 0) | |
278 | goto DONE; | |
279 | ||
280 | start = get_timer (0); | |
281 | last = start; | |
282 | addr = info->start[l_sect]; | |
283 | while ((in8(addr) & 0x80) != 0x80) { | |
284 | if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { | |
285 | printf ("Timeout\n"); | |
286 | return 1; | |
287 | } | |
288 | /* show that we're waiting */ | |
289 | if ((now - last) > 1000) { /* every second */ | |
290 | putc ('.'); | |
291 | last = now; | |
292 | } | |
293 | iobarrier_rw(); | |
294 | } | |
295 | ||
296 | DONE: | |
297 | /* reset to read mode */ | |
298 | flash_reset (info->start[0]); | |
299 | ||
300 | printf (" done\n"); | |
301 | return 0; | |
302 | } | |
303 | ||
304 | /* | |
305 | * Copy memory to flash, returns: | |
306 | * 0 - OK | |
307 | * 1 - write timeout | |
308 | * 2 - Flash not erased | |
309 | */ | |
310 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
311 | { | |
312 | ulong cp, wp, data; | |
313 | int i, l, rc; | |
314 | ||
315 | wp = (addr & ~3); /* get lower word aligned address */ | |
316 | ||
317 | /* | |
318 | * handle unaligned start bytes | |
319 | */ | |
320 | if ((l = addr - wp) != 0) { | |
321 | data = 0; | |
322 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
323 | data = (data << 8) | (*(uchar *)cp); | |
324 | } | |
325 | for (; i<4 && cnt>0; ++i) { | |
326 | data = (data << 8) | *src++; | |
327 | --cnt; | |
328 | ++cp; | |
329 | } | |
330 | for (; cnt==0 && i<4; ++i, ++cp) { | |
331 | data = (data << 8) | (*(uchar *)cp); | |
332 | } | |
333 | ||
334 | if ((rc = write_word(info, wp, data)) != 0) { | |
335 | return (rc); | |
336 | } | |
337 | wp += 4; | |
338 | } | |
339 | ||
340 | /* | |
341 | * handle word aligned part | |
342 | */ | |
343 | while (cnt >= 4) { | |
344 | data = 0; | |
345 | for (i=0; i<4; ++i) { | |
346 | data = (data << 8) | *src++; | |
347 | } | |
348 | if ((rc = write_word(info, wp, data)) != 0) { | |
349 | return (rc); | |
350 | } | |
351 | wp += 4; | |
352 | cnt -= 4; | |
353 | } | |
354 | ||
355 | if (cnt == 0) { | |
356 | return (0); | |
357 | } | |
358 | ||
359 | /* | |
360 | * handle unaligned tail bytes | |
361 | */ | |
362 | data = 0; | |
363 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
364 | data = (data << 8) | *src++; | |
365 | --cnt; | |
366 | } | |
367 | for (; i<4; ++i, ++cp) { | |
368 | data = (data << 8) | (*(uchar *)cp); | |
369 | } | |
370 | ||
371 | return (write_word(info, wp, data)); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Write a word to Flash, returns: | |
376 | * 0 - OK | |
377 | * 1 - write timeout | |
378 | * 2 - Flash not erased | |
379 | */ | |
380 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
381 | { | |
382 | volatile u32 addr = info->start[0]; | |
383 | ulong start; | |
384 | int flag, i; | |
385 | ||
386 | /* Check if Flash is (sufficiently) erased */ | |
387 | if ((in32(dest) & data) != data) { | |
388 | return (2); | |
389 | } | |
390 | /* Disable interrupts which might cause a timeout here */ | |
391 | flag = disable_interrupts(); | |
392 | ||
393 | /* first, perform an unlock bypass command to speed up flash writes */ | |
394 | out8(addr + 0x555, 0xAA); | |
395 | iobarrier_rw(); | |
396 | out8(addr + 0x2AA, 0x55); | |
397 | iobarrier_rw(); | |
398 | out8(addr + 0x555, 0x20); | |
399 | iobarrier_rw(); | |
400 | ||
401 | /* write each byte out */ | |
402 | for (i = 0; i < 4; i++) { | |
403 | char *data_ch = (char *)&data; | |
404 | out8(addr, 0xA0); | |
405 | iobarrier_rw(); | |
406 | out8(dest+i, data_ch[i]); | |
407 | iobarrier_rw(); | |
408 | udelay(10); /* XXX */ | |
409 | } | |
410 | ||
411 | /* we're done, now do an unlock bypass reset */ | |
412 | out8(addr, 0x90); | |
413 | iobarrier_rw(); | |
414 | out8(addr, 0x00); | |
415 | iobarrier_rw(); | |
416 | ||
417 | /* re-enable interrupts if necessary */ | |
418 | if (flag) | |
419 | enable_interrupts(); | |
420 | ||
421 | /* data polling for D7 */ | |
422 | start = get_timer (0); | |
423 | while ((in32(dest) & 0x80808080) != (data & 0x80808080)) { | |
424 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { | |
425 | return (1); | |
426 | } | |
427 | iobarrier_rw(); | |
428 | } | |
429 | ||
430 | flash_reset (addr); | |
431 | ||
432 | return (0); | |
433 | } | |
434 | ||
435 | /* | |
436 | * Reset bank to read mode | |
437 | */ | |
438 | static void flash_reset (u32 addr) | |
439 | { | |
440 | out8(addr, 0xF0); /* reset bank */ | |
441 | iobarrier_rw(); | |
442 | } | |
443 | ||
444 | void flash_print_info (flash_info_t *info) | |
445 | { | |
446 | int i; | |
447 | ||
448 | if (info->flash_id == FLASH_UNKNOWN) { | |
449 | printf ("missing or unknown FLASH type\n"); | |
450 | return; | |
451 | } | |
452 | ||
453 | switch (info->flash_id & FLASH_VENDMASK) { | |
454 | case FLASH_MAN_AMD: printf ("AMD "); break; | |
455 | case FLASH_MAN_FUJ: printf ("FUJITSU "); break; | |
456 | case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; | |
457 | default: printf ("Unknown Vendor "); break; | |
458 | } | |
459 | ||
460 | switch (info->flash_id & FLASH_TYPEMASK) { | |
461 | case FLASH_AM033C: printf ("AM29LV033C (32 Mbit, uniform sectors)\n"); | |
462 | break; | |
463 | default: printf ("Unknown Chip Type\n"); | |
464 | break; | |
465 | } | |
466 | ||
467 | if (info->size % 0x100000 == 0) { | |
468 | printf (" Size: %ld MB in %d Sectors\n", | |
469 | info->size / 0x100000, info->sector_count); | |
470 | } | |
471 | else if (info->size % 0x400 == 0) { | |
472 | printf (" Size: %ld KB in %d Sectors\n", | |
473 | info->size / 0x400, info->sector_count); | |
474 | } | |
475 | else { | |
476 | printf (" Size: %ld B in %d Sectors\n", | |
477 | info->size, info->sector_count); | |
478 | } | |
479 | ||
480 | printf (" Sector Start Addresses:"); | |
481 | for (i=0; i<info->sector_count; ++i) { | |
482 | if ((i % 5) == 0) | |
483 | printf ("\n "); | |
484 | printf (" %08lX%s", | |
485 | info->start[i], | |
486 | info->protect[i] ? " (RO)" : " " | |
487 | ); | |
488 | } | |
489 | printf ("\n"); | |
490 | } |