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affae2bf WD |
1 | /* |
2 | * (C) Copyright 2000 | |
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 | #include <common.h> | |
25 | #include <mpc8xx.h> | |
26 | ||
6d0f6bcf | 27 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
affae2bf | 28 | |
5a1aceb0 | 29 | #if defined(CONFIG_ENV_IS_IN_FLASH) |
0e8d1586 | 30 | # ifndef CONFIG_ENV_ADDR |
6d0f6bcf | 31 | # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET) |
affae2bf | 32 | # endif |
0e8d1586 JCPV |
33 | # ifndef CONFIG_ENV_SIZE |
34 | # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE | |
affae2bf | 35 | # endif |
0e8d1586 JCPV |
36 | # ifndef CONFIG_ENV_SECT_SIZE |
37 | # define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE | |
affae2bf WD |
38 | # endif |
39 | #endif | |
40 | ||
41 | /*----------------------------------------------------------------------- | |
42 | * Functions | |
43 | */ | |
44 | static ulong flash_get_size (vu_long *addr, flash_info_t *info); | |
45 | static int write_data (flash_info_t *info, ulong dest, ulong data); | |
46 | static void flash_get_offsets (ulong base, flash_info_t *info); | |
47 | ||
48 | /*----------------------------------------------------------------------- | |
49 | */ | |
50 | ||
51 | unsigned long flash_init (void) | |
52 | { | |
6d0f6bcf | 53 | volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; |
affae2bf WD |
54 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
55 | unsigned long size_b0; | |
56 | int i; | |
57 | ||
58 | /* Init: no FLASHes known */ | |
6d0f6bcf | 59 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
affae2bf WD |
60 | flash_info[i].flash_id = FLASH_UNKNOWN; |
61 | } | |
62 | ||
63 | /* Static FLASH Bank configuration here - FIXME XXX */ | |
64 | ||
65 | size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]); | |
66 | ||
67 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { | |
68 | printf ("## Unknown FLASH on Bank 0: " | |
69 | "ID 0x%lx, Size = 0x%08lx = %ld MB\n", | |
70 | flash_info[0].flash_id, | |
71 | size_b0, size_b0<<20); | |
72 | } | |
73 | ||
74 | /* Remap FLASH according to real size */ | |
6d0f6bcf JCPV |
75 | memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000); |
76 | memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | \ | |
affae2bf WD |
77 | BR_MS_GPCM | BR_PS_16 | BR_V; |
78 | ||
79 | /* Re-do sizing to get full correct info */ | |
6d0f6bcf | 80 | size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
affae2bf | 81 | |
6d0f6bcf | 82 | flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]); |
affae2bf WD |
83 | |
84 | flash_info[0].size = size_b0; | |
85 | ||
6d0f6bcf | 86 | #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE |
affae2bf WD |
87 | /* monitor protection ON by default */ |
88 | flash_protect(FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
89 | CONFIG_SYS_MONITOR_BASE, |
90 | CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, | |
affae2bf WD |
91 | &flash_info[0]); |
92 | #endif | |
93 | ||
5a1aceb0 | 94 | #ifdef CONFIG_ENV_IS_IN_FLASH |
affae2bf WD |
95 | /* ENV protection ON by default */ |
96 | flash_protect(FLAG_PROTECT_SET, | |
0e8d1586 JCPV |
97 | CONFIG_ENV_ADDR, |
98 | CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1, | |
affae2bf WD |
99 | &flash_info[0]); |
100 | #endif | |
101 | ||
102 | return (size_b0); | |
103 | } | |
104 | ||
105 | /*----------------------------------------------------------------------- | |
106 | */ | |
107 | static void flash_get_offsets (ulong base, flash_info_t *info) | |
108 | { | |
109 | int i; | |
110 | ||
111 | if (info->flash_id == FLASH_UNKNOWN) { | |
112 | return; | |
113 | } | |
114 | ||
115 | switch (info->flash_id & FLASH_VENDMASK) { | |
116 | case FLASH_MAN_MT: | |
117 | if (info->flash_id & FLASH_BTYPE) { | |
118 | /* set sector offsets for bottom boot block type */ | |
119 | info->start[0] = base + 0x00000000; | |
120 | info->start[1] = base + 0x00004000; | |
121 | info->start[2] = base + 0x00006000; | |
122 | info->start[3] = base + 0x00008000; | |
123 | for (i = 4; i < info->sector_count; i++) { | |
124 | info->start[i] = base + ((i-3) * 0x00020000); | |
125 | } | |
126 | } else { | |
127 | /* set sector offsets for top boot block type */ | |
128 | i = info->sector_count - 1; | |
129 | info->start[i--] = base + info->size - 0x00004000; | |
130 | info->start[i--] = base + info->size - 0x00006000; | |
131 | info->start[i--] = base + info->size - 0x00008000; | |
132 | for (; i >= 0; i--) { | |
133 | info->start[i] = base + i * 0x00020000; | |
134 | } | |
135 | } | |
136 | return; | |
137 | ||
138 | case FLASH_MAN_SST: | |
139 | for (i = 0; i < info->sector_count; i++) { | |
140 | info->start[i] = base + (i * 0x00002000); | |
141 | } | |
142 | return; | |
143 | ||
144 | case FLASH_MAN_AMD: | |
145 | case FLASH_MAN_FUJ: | |
146 | ||
147 | /* set up sector start address table */ | |
148 | if (info->flash_id & FLASH_BTYPE) { | |
149 | /* set sector offsets for bottom boot block type */ | |
150 | info->start[0] = base + 0x00000000; | |
151 | info->start[1] = base + 0x00008000; | |
152 | info->start[2] = base + 0x0000C000; | |
153 | info->start[3] = base + 0x00010000; | |
154 | for (i = 4; i < info->sector_count; i++) { | |
155 | info->start[i] = base + (i * 0x00020000) - 0x00060000; | |
156 | } | |
157 | } else { | |
158 | /* set sector offsets for top boot block type */ | |
159 | i = info->sector_count - 1; | |
160 | info->start[i--] = base + info->size - 0x00008000; | |
161 | info->start[i--] = base + info->size - 0x0000C000; | |
162 | info->start[i--] = base + info->size - 0x00010000; | |
163 | for (; i >= 0; i--) { | |
164 | info->start[i] = base + i * 0x00020000; | |
165 | } | |
166 | } | |
167 | return; | |
168 | default: | |
169 | printf ("Don't know sector ofsets for flash type 0x%lx\n", | |
170 | info->flash_id); | |
171 | return; | |
172 | } | |
173 | } | |
174 | ||
175 | /*----------------------------------------------------------------------- | |
176 | */ | |
177 | void flash_print_info (flash_info_t *info) | |
178 | { | |
179 | int i; | |
180 | ||
181 | if (info->flash_id == FLASH_UNKNOWN) { | |
182 | printf ("missing or unknown FLASH type\n"); | |
183 | return; | |
184 | } | |
185 | ||
186 | switch (info->flash_id & FLASH_VENDMASK) { | |
187 | case FLASH_MAN_AMD: printf ("AMD "); break; | |
188 | case FLASH_MAN_FUJ: printf ("Fujitsu "); break; | |
189 | case FLASH_MAN_SST: printf ("SST "); break; | |
190 | case FLASH_MAN_STM: printf ("STM "); break; | |
191 | case FLASH_MAN_MT: printf ("MT "); break; | |
192 | case FLASH_MAN_INTEL: printf ("Intel "); break; | |
193 | default: printf ("Unknown Vendor "); break; | |
194 | } | |
195 | ||
196 | switch (info->flash_id & FLASH_TYPEMASK) { | |
197 | case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); | |
198 | break; | |
199 | case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); | |
200 | break; | |
201 | case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); | |
202 | break; | |
203 | case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); | |
204 | break; | |
205 | case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); | |
206 | break; | |
207 | case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); | |
208 | break; | |
209 | case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); | |
210 | break; | |
211 | case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); | |
212 | break; | |
213 | case FLASH_SST200A: printf ("39xF200A (2M = 128K x 16)\n"); | |
214 | break; | |
215 | case FLASH_SST400A: printf ("39xF400A (4M = 256K x 16)\n"); | |
216 | break; | |
217 | case FLASH_SST800A: printf ("39xF800A (8M = 512K x 16)\n"); | |
218 | break; | |
219 | case FLASH_STM800AB: printf ("M29W800AB (8M = 512K x 16)\n"); | |
220 | break; | |
221 | case FLASH_28F008S5: printf ("28F008S5 (1M = 64K x 16)\n"); | |
222 | break; | |
223 | case FLASH_28F400_T: printf ("28F400B3 (4Mbit, top boot sector)\n"); | |
224 | break; | |
225 | case FLASH_28F400_B: printf ("28F400B3 (4Mbit, bottom boot sector)\n"); | |
226 | break; | |
227 | default: printf ("Unknown Chip Type\n"); | |
228 | break; | |
229 | } | |
230 | ||
231 | if (info->size >= (1 << 20)) { | |
232 | i = 20; | |
233 | } else { | |
234 | i = 10; | |
235 | } | |
236 | printf (" Size: %ld %cB in %d Sectors\n", | |
237 | info->size >> i, | |
238 | (i == 20) ? 'M' : 'k', | |
239 | info->sector_count); | |
240 | ||
241 | printf (" Sector Start Addresses:"); | |
242 | for (i=0; i<info->sector_count; ++i) { | |
243 | if ((i % 5) == 0) | |
244 | printf ("\n "); | |
245 | printf (" %08lX%s", | |
246 | info->start[i], | |
247 | info->protect[i] ? " (RO)" : " " | |
248 | ); | |
249 | } | |
250 | printf ("\n"); | |
251 | return; | |
252 | } | |
253 | ||
254 | /*----------------------------------------------------------------------- | |
255 | */ | |
256 | ||
257 | ||
258 | /*----------------------------------------------------------------------- | |
259 | */ | |
260 | ||
261 | /* | |
262 | * The following code cannot be run from FLASH! | |
263 | */ | |
264 | ||
265 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) | |
266 | { | |
267 | ushort value; | |
268 | vu_short *saddr = (vu_short *)addr; | |
269 | ||
270 | /* Read Manufacturer ID */ | |
271 | saddr[0] = 0x0090; | |
272 | value = saddr[0]; | |
273 | ||
274 | switch (value) { | |
275 | case (AMD_MANUFACT & 0xFFFF): | |
276 | info->flash_id = FLASH_MAN_AMD; | |
277 | break; | |
278 | case (FUJ_MANUFACT & 0xFFFF): | |
279 | info->flash_id = FLASH_MAN_FUJ; | |
280 | break; | |
281 | case (SST_MANUFACT & 0xFFFF): | |
282 | info->flash_id = FLASH_MAN_SST; | |
283 | break; | |
284 | case (STM_MANUFACT & 0xFFFF): | |
285 | info->flash_id = FLASH_MAN_STM; | |
286 | break; | |
287 | case (MT_MANUFACT & 0xFFFF): | |
288 | info->flash_id = FLASH_MAN_MT; | |
289 | break; | |
290 | default: | |
291 | info->flash_id = FLASH_UNKNOWN; | |
292 | info->sector_count = 0; | |
293 | info->size = 0; | |
294 | saddr[0] = 0x00FF; /* restore read mode */ | |
295 | return (0); /* no or unknown flash */ | |
296 | } | |
297 | ||
298 | value = saddr[1]; /* device ID */ | |
299 | ||
300 | switch (value) { | |
301 | case (AMD_ID_LV400T & 0xFFFF): | |
302 | info->flash_id += FLASH_AM400T; | |
303 | info->sector_count = 11; | |
304 | info->size = 0x00100000; | |
305 | break; /* => 1 MB */ | |
306 | ||
307 | case (AMD_ID_LV400B & 0xFFFF): | |
308 | info->flash_id += FLASH_AM400B; | |
309 | info->sector_count = 11; | |
310 | info->size = 0x00100000; | |
311 | break; /* => 1 MB */ | |
312 | ||
313 | case (AMD_ID_LV800T & 0xFFFF): | |
314 | info->flash_id += FLASH_AM800T; | |
315 | info->sector_count = 19; | |
316 | info->size = 0x00200000; | |
317 | break; /* => 2 MB */ | |
318 | ||
319 | case (AMD_ID_LV800B & 0xFFFF): | |
320 | info->flash_id += FLASH_AM800B; | |
321 | info->sector_count = 19; | |
322 | info->size = 0x00200000; | |
323 | break; /* => 2 MB */ | |
324 | ||
325 | case (AMD_ID_LV160T & 0xFFFF): | |
326 | info->flash_id += FLASH_AM160T; | |
327 | info->sector_count = 35; | |
328 | info->size = 0x00400000; | |
329 | break; /* => 4 MB */ | |
330 | ||
331 | case (AMD_ID_LV160B & 0xFFFF): | |
332 | info->flash_id += FLASH_AM160B; | |
333 | info->sector_count = 35; | |
334 | info->size = 0x00400000; | |
335 | break; /* => 4 MB */ | |
336 | #if 0 /* enable when device IDs are available */ | |
337 | case (AMD_ID_LV320T & 0xFFFF): | |
338 | info->flash_id += FLASH_AM320T; | |
339 | info->sector_count = 67; | |
340 | info->size = 0x00800000; | |
341 | break; /* => 8 MB */ | |
342 | ||
343 | case (AMD_ID_LV320B & 0xFFFF): | |
344 | info->flash_id += FLASH_AM320B; | |
345 | info->sector_count = 67; | |
346 | info->size = 0x00800000; | |
347 | break; /* => 8 MB */ | |
348 | #endif | |
349 | case (SST_ID_xF200A & 0xFFFF): | |
350 | info->flash_id += FLASH_SST200A; | |
351 | info->sector_count = 64; /* 39xF200A ID ( 2M = 128K x 16 ) */ | |
352 | info->size = 0x00080000; | |
353 | break; | |
354 | case (SST_ID_xF400A & 0xFFFF): | |
355 | info->flash_id += FLASH_SST400A; | |
356 | info->sector_count = 128; /* 39xF400A ID ( 4M = 256K x 16 ) */ | |
357 | info->size = 0x00100000; | |
358 | break; | |
359 | case (SST_ID_xF800A & 0xFFFF): | |
360 | info->flash_id += FLASH_SST800A; | |
361 | info->sector_count = 256; /* 39xF800A ID ( 8M = 512K x 16 ) */ | |
362 | info->size = 0x00200000; | |
363 | break; /* => 2 MB */ | |
364 | case (STM_ID_x800AB & 0xFFFF): | |
365 | info->flash_id += FLASH_STM800AB; | |
366 | info->sector_count = 19; | |
367 | info->size = 0x00200000; | |
368 | break; /* => 2 MB */ | |
369 | case (MT_ID_28F400_T & 0xFFFF): | |
370 | info->flash_id += FLASH_28F400_T; | |
371 | info->sector_count = 7; | |
372 | info->size = 0x00080000; | |
373 | break; /* => 512 kB */ | |
374 | case (MT_ID_28F400_B & 0xFFFF): | |
375 | info->flash_id += FLASH_28F400_B; | |
376 | info->sector_count = 7; | |
377 | info->size = 0x00080000; | |
378 | break; /* => 512 kB */ | |
379 | default: | |
380 | info->flash_id = FLASH_UNKNOWN; | |
381 | saddr[0] = 0x00FF; /* restore read mode */ | |
382 | return (0); /* => no or unknown flash */ | |
383 | ||
384 | } | |
385 | ||
6d0f6bcf | 386 | if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) { |
affae2bf | 387 | printf ("** ERROR: sector count %d > max (%d) **\n", |
6d0f6bcf JCPV |
388 | info->sector_count, CONFIG_SYS_MAX_FLASH_SECT); |
389 | info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; | |
affae2bf WD |
390 | } |
391 | ||
392 | saddr[0] = 0x00FF; /* restore read mode */ | |
393 | ||
394 | return (info->size); | |
395 | } | |
396 | ||
397 | ||
398 | /*----------------------------------------------------------------------- | |
399 | */ | |
400 | ||
401 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
402 | { | |
403 | int flag, prot, sect; | |
404 | ulong start, now, last; | |
405 | ||
406 | if ((s_first < 0) || (s_first > s_last)) { | |
407 | if (info->flash_id == FLASH_UNKNOWN) { | |
408 | printf ("- missing\n"); | |
409 | } else { | |
410 | printf ("- no sectors to erase\n"); | |
411 | } | |
412 | return 1; | |
413 | } | |
414 | ||
415 | if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_MT) { | |
416 | printf ("Can erase only MT flash types - aborted\n"); | |
417 | return 1; | |
418 | } | |
419 | ||
420 | prot = 0; | |
421 | for (sect=s_first; sect<=s_last; ++sect) { | |
422 | if (info->protect[sect]) { | |
423 | prot++; | |
424 | } | |
425 | } | |
426 | ||
427 | if (prot) { | |
428 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
429 | prot); | |
430 | } else { | |
431 | printf ("\n"); | |
432 | } | |
433 | ||
434 | start = get_timer (0); | |
435 | last = start; | |
436 | /* Start erase on unprotected sectors */ | |
437 | for (sect = s_first; sect<=s_last; sect++) { | |
438 | if (info->protect[sect] == 0) { /* not protected */ | |
439 | vu_short *addr = (vu_short *)(info->start[sect]); | |
440 | unsigned short status; | |
441 | ||
442 | /* Disable interrupts which might cause a timeout here */ | |
443 | flag = disable_interrupts(); | |
444 | ||
445 | *addr = 0x0050; /* clear status register */ | |
446 | *addr = 0x0020; /* erase setup */ | |
447 | *addr = 0x00D0; /* erase confirm */ | |
448 | ||
449 | /* re-enable interrupts if necessary */ | |
450 | if (flag) | |
451 | enable_interrupts(); | |
452 | ||
453 | /* wait at least 80us - let's wait 1 ms */ | |
454 | udelay (1000); | |
455 | ||
456 | while (((status = *addr) & 0x0080) != 0x0080) { | |
6d0f6bcf | 457 | if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
affae2bf WD |
458 | printf ("Timeout\n"); |
459 | *addr = 0x00FF; /* reset to read mode */ | |
460 | return 1; | |
461 | } | |
462 | ||
463 | /* show that we're waiting */ | |
464 | if ((now - last) > 1000) { /* every second */ | |
465 | putc ('.'); | |
466 | last = now; | |
467 | } | |
468 | } | |
469 | ||
470 | *addr = 0x00FF; /* reset to read mode */ | |
471 | } | |
472 | } | |
473 | printf (" done\n"); | |
474 | return 0; | |
475 | } | |
476 | ||
477 | /*----------------------------------------------------------------------- | |
478 | * Copy memory to flash, returns: | |
479 | * 0 - OK | |
480 | * 1 - write timeout | |
481 | * 2 - Flash not erased | |
482 | * 4 - Flash not identified | |
483 | */ | |
484 | ||
485 | #define FLASH_WIDTH 2 /* flash bus width in bytes */ | |
486 | ||
487 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
488 | { | |
489 | ulong cp, wp, data; | |
490 | int i, l, rc; | |
491 | ||
492 | if (info->flash_id == FLASH_UNKNOWN) { | |
493 | return 4; | |
494 | } | |
495 | ||
496 | wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */ | |
497 | ||
498 | /* | |
499 | * handle unaligned start bytes | |
500 | */ | |
501 | if ((l = addr - wp) != 0) { | |
502 | data = 0; | |
503 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
504 | data = (data << 8) | (*(uchar *)cp); | |
505 | } | |
506 | for (; i<FLASH_WIDTH && cnt>0; ++i) { | |
507 | data = (data << 8) | *src++; | |
508 | --cnt; | |
509 | ++cp; | |
510 | } | |
511 | for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) { | |
512 | data = (data << 8) | (*(uchar *)cp); | |
513 | } | |
514 | ||
515 | if ((rc = write_data(info, wp, data)) != 0) { | |
516 | return (rc); | |
517 | } | |
518 | wp += FLASH_WIDTH; | |
519 | } | |
520 | ||
521 | /* | |
522 | * handle FLASH_WIDTH aligned part | |
523 | */ | |
524 | while (cnt >= FLASH_WIDTH) { | |
525 | data = 0; | |
526 | for (i=0; i<FLASH_WIDTH; ++i) { | |
527 | data = (data << 8) | *src++; | |
528 | } | |
529 | if ((rc = write_data(info, wp, data)) != 0) { | |
530 | return (rc); | |
531 | } | |
532 | wp += FLASH_WIDTH; | |
533 | cnt -= FLASH_WIDTH; | |
534 | } | |
535 | ||
536 | if (cnt == 0) { | |
537 | return (0); | |
538 | } | |
539 | ||
540 | /* | |
541 | * handle unaligned tail bytes | |
542 | */ | |
543 | data = 0; | |
544 | for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) { | |
545 | data = (data << 8) | *src++; | |
546 | --cnt; | |
547 | } | |
548 | for (; i<FLASH_WIDTH; ++i, ++cp) { | |
549 | data = (data << 8) | (*(uchar *)cp); | |
550 | } | |
551 | ||
552 | return (write_data(info, wp, data)); | |
553 | } | |
554 | ||
555 | /*----------------------------------------------------------------------- | |
556 | * Write a word to Flash, returns: | |
557 | * 0 - OK | |
558 | * 1 - write timeout | |
559 | * 2 - Flash not erased | |
560 | */ | |
561 | static int write_data (flash_info_t *info, ulong dest, ulong data) | |
562 | { | |
563 | vu_short *addr = (vu_short *)dest; | |
564 | ushort sdata = (ushort)data; | |
565 | ushort status; | |
566 | ulong start; | |
567 | int flag; | |
568 | ||
569 | /* Check if Flash is (sufficiently) erased */ | |
570 | if ((*addr & sdata) != sdata) { | |
571 | return (2); | |
572 | } | |
573 | /* Disable interrupts which might cause a timeout here */ | |
574 | flag = disable_interrupts(); | |
575 | ||
576 | *addr = 0x0040; /* write setup */ | |
577 | *addr = sdata; | |
578 | ||
579 | /* re-enable interrupts if necessary */ | |
580 | if (flag) | |
581 | enable_interrupts(); | |
582 | ||
583 | start = get_timer (0); | |
584 | ||
585 | while (((status = *addr) & 0x0080) != 0x0080) { | |
6d0f6bcf | 586 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
affae2bf WD |
587 | *addr = 0x00FF; /* restore read mode */ |
588 | return (1); | |
589 | } | |
590 | } | |
591 | ||
592 | *addr = 0x00FF; /* restore read mode */ | |
593 | ||
594 | return (0); | |
595 | } | |
596 | ||
597 | /*----------------------------------------------------------------------- | |
598 | */ |