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db01a2ea WD |
1 | /* |
2 | * (C) Copyright 2000-2004 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
db01a2ea WD |
6 | */ |
7 | ||
8 | /* | |
9 | * Modified 4/5/2001 | |
10 | * Wait for completion of each sector erase command issued | |
11 | * 4/5/2001 | |
12 | * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com | |
13 | */ | |
14 | ||
15 | #include <common.h> | |
b36df561 | 16 | #include <asm/ppc4xx.h> |
db01a2ea WD |
17 | #include <asm/processor.h> |
18 | ||
6d0f6bcf JCPV |
19 | #if CONFIG_SYS_MAX_FLASH_BANKS != 1 |
20 | #error "CONFIG_SYS_MAX_FLASH_BANKS must be 1" | |
db01a2ea | 21 | #endif |
6d0f6bcf | 22 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
db01a2ea WD |
23 | |
24 | /*----------------------------------------------------------------------- | |
25 | * Functions | |
26 | */ | |
27 | static ulong flash_get_size (vu_long * addr, flash_info_t * info); | |
28 | static int write_word (flash_info_t * info, ulong dest, ulong data); | |
29 | static void flash_get_offsets (ulong base, flash_info_t * info); | |
30 | ||
6bdd1377 WD |
31 | #define ADDR0 0x5555 |
32 | #define ADDR1 0x2aaa | |
db01a2ea WD |
33 | #define FLASH_WORD_SIZE unsigned char |
34 | ||
35 | /*----------------------------------------------------------------------- | |
36 | */ | |
37 | ||
38 | unsigned long flash_init (void) | |
39 | { | |
40 | unsigned long size_b0; | |
db01a2ea WD |
41 | |
42 | /* Init: no FLASHes known */ | |
43 | flash_info[0].flash_id = FLASH_UNKNOWN; | |
44 | ||
45 | /* Static FLASH Bank configuration here - FIXME XXX */ | |
46 | ||
08f1080c | 47 | size_b0 = flash_get_size ((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]); |
db01a2ea WD |
48 | |
49 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { | |
08f1080c WD |
50 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", |
51 | size_b0, size_b0 << 20); | |
db01a2ea WD |
52 | } |
53 | ||
54 | /* Only one bank */ | |
55 | /* Setup offsets */ | |
56 | flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]); | |
57 | ||
58 | /* Monitor protection ON by default */ | |
59 | (void) flash_protect (FLAG_PROTECT_SET, | |
60 | FLASH_BASE0_PRELIM, | |
61 | FLASH_BASE0_PRELIM + monitor_flash_len - 1, | |
62 | &flash_info[0]); | |
63 | flash_info[0].size = size_b0; | |
64 | ||
65 | return size_b0; | |
66 | } | |
67 | ||
68 | ||
69 | /*----------------------------------------------------------------------- | |
70 | */ | |
6bdd1377 WD |
71 | /* |
72 | * This implementation assumes that the flash chips are uniform sector | |
73 | * devices. This is true for all likely JSE devices. | |
74 | */ | |
db01a2ea WD |
75 | static void flash_get_offsets (ulong base, flash_info_t * info) |
76 | { | |
6bdd1377 WD |
77 | unsigned idx; |
78 | unsigned long sector_size = info->size / info->sector_count; | |
db01a2ea | 79 | |
6bdd1377 WD |
80 | for (idx = 0; idx < info->sector_count; idx += 1) { |
81 | info->start[idx] = base + (idx * sector_size); | |
db01a2ea WD |
82 | } |
83 | } | |
84 | ||
85 | /*----------------------------------------------------------------------- | |
86 | */ | |
87 | void flash_print_info (flash_info_t * info) | |
88 | { | |
89 | int i; | |
90 | int k; | |
91 | int size; | |
92 | int erased; | |
93 | volatile unsigned long *flash; | |
94 | ||
95 | if (info->flash_id == FLASH_UNKNOWN) { | |
96 | printf ("missing or unknown FLASH type\n"); | |
97 | return; | |
98 | } | |
99 | ||
100 | switch (info->flash_id & FLASH_VENDMASK) { | |
101 | case FLASH_MAN_AMD: | |
102 | printf ("AMD "); | |
103 | break; | |
104 | case FLASH_MAN_FUJ: | |
105 | printf ("FUJITSU "); | |
106 | break; | |
107 | case FLASH_MAN_SST: | |
108 | printf ("SST "); | |
109 | break; | |
6bdd1377 WD |
110 | case FLASH_MAN_STM: |
111 | printf ("ST Micro "); | |
112 | break; | |
db01a2ea WD |
113 | default: |
114 | printf ("Unknown Vendor "); | |
115 | break; | |
116 | } | |
117 | ||
6bdd1377 WD |
118 | /* (Reduced table of only parts expected in JSE boards.) */ |
119 | switch (info->flash_id) { | |
120 | case FLASH_MAN_AMD | FLASH_AM040: | |
db01a2ea WD |
121 | printf ("AM29F040 (512 Kbit, uniform sector size)\n"); |
122 | break; | |
6bdd1377 WD |
123 | case FLASH_MAN_STM | FLASH_AM040: |
124 | printf ("MM29W040W (512 Kbit, uniform sector size)\n"); | |
db01a2ea WD |
125 | break; |
126 | default: | |
127 | printf ("Unknown Chip Type\n"); | |
128 | break; | |
129 | } | |
130 | ||
131 | printf (" Size: %ld KB in %d Sectors\n", | |
132 | info->size >> 10, info->sector_count); | |
133 | ||
134 | printf (" Sector Start Addresses:"); | |
135 | for (i = 0; i < info->sector_count; ++i) { | |
136 | /* | |
137 | * Check if whole sector is erased | |
138 | */ | |
139 | if (i != (info->sector_count - 1)) | |
140 | size = info->start[i + 1] - info->start[i]; | |
141 | else | |
142 | size = info->start[0] + info->size - info->start[i]; | |
143 | erased = 1; | |
144 | flash = (volatile unsigned long *) info->start[i]; | |
145 | size = size >> 2; /* divide by 4 for longword access */ | |
146 | for (k = 0; k < size; k++) { | |
147 | if (*flash++ != 0xffffffff) { | |
148 | erased = 0; | |
149 | break; | |
150 | } | |
151 | } | |
152 | ||
153 | if ((i % 5) == 0) | |
154 | printf ("\n "); | |
db01a2ea WD |
155 | printf (" %08lX%s%s", |
156 | info->start[i], | |
157 | erased ? " E" : " ", info->protect[i] ? "RO " : " " | |
08f1080c | 158 | ); |
db01a2ea WD |
159 | } |
160 | printf ("\n"); | |
161 | return; | |
162 | } | |
163 | ||
164 | /*----------------------------------------------------------------------- | |
165 | */ | |
166 | ||
167 | ||
168 | /*----------------------------------------------------------------------- | |
169 | */ | |
170 | ||
171 | /* | |
172 | * The following code cannot be run from FLASH! | |
173 | */ | |
174 | static ulong flash_get_size (vu_long * addr, flash_info_t * info) | |
175 | { | |
176 | short i; | |
177 | FLASH_WORD_SIZE value; | |
178 | ulong base = (ulong) addr; | |
179 | volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr; | |
180 | ||
181 | /* Write auto select command: read Manufacturer ID */ | |
182 | addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; | |
183 | addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; | |
184 | addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090; | |
185 | ||
db01a2ea | 186 | value = addr2[0]; |
db01a2ea WD |
187 | |
188 | switch (value) { | |
189 | case (FLASH_WORD_SIZE) AMD_MANUFACT: | |
190 | info->flash_id = FLASH_MAN_AMD; | |
191 | break; | |
192 | case (FLASH_WORD_SIZE) FUJ_MANUFACT: | |
193 | info->flash_id = FLASH_MAN_FUJ; | |
194 | break; | |
195 | case (FLASH_WORD_SIZE) SST_MANUFACT: | |
196 | info->flash_id = FLASH_MAN_SST; | |
197 | break; | |
6bdd1377 WD |
198 | case (FLASH_WORD_SIZE)STM_MANUFACT: |
199 | info->flash_id = FLASH_MAN_STM; | |
200 | break; | |
db01a2ea WD |
201 | default: |
202 | info->flash_id = FLASH_UNKNOWN; | |
203 | info->sector_count = 0; | |
204 | info->size = 0; | |
6bdd1377 | 205 | printf("Unknown flash manufacturer code: 0x%x\n", value); |
db01a2ea WD |
206 | return (0); /* no or unknown flash */ |
207 | } | |
208 | ||
6bdd1377 | 209 | value = addr2[1]; /* device ID */ |
db01a2ea WD |
210 | |
211 | switch (value) { | |
212 | case (FLASH_WORD_SIZE) AMD_ID_F040B: | |
213 | info->flash_id += FLASH_AM040; | |
214 | info->sector_count = 8; | |
215 | info->size = 0x0080000; /* => 512 ko */ | |
216 | break; | |
217 | case (FLASH_WORD_SIZE) AMD_ID_LV040B: | |
218 | info->flash_id += FLASH_AM040; | |
219 | info->sector_count = 8; | |
220 | info->size = 0x0080000; /* => 512 ko */ | |
221 | break; | |
6bdd1377 WD |
222 | case (FLASH_WORD_SIZE)STM_ID_M29W040B: /* most likele JSE chip */ |
223 | info->flash_id += FLASH_AM040; | |
224 | info->sector_count = 8; | |
225 | info->size = 0x0080000; /* => 512 ko */ | |
226 | break; | |
db01a2ea WD |
227 | default: |
228 | info->flash_id = FLASH_UNKNOWN; | |
229 | return (0); /* => no or unknown flash */ | |
230 | ||
231 | } | |
232 | ||
6bdd1377 WD |
233 | /* Calculate the sector offsets (Use JSE Optimized code). */ |
234 | flash_get_offsets(base, info); | |
db01a2ea WD |
235 | |
236 | /* check for protected sectors */ | |
237 | for (i = 0; i < info->sector_count; i++) { | |
238 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
239 | /* D0 = 1 if protected */ | |
db01a2ea WD |
240 | addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]); |
241 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) | |
242 | info->protect[i] = 0; | |
243 | else | |
244 | info->protect[i] = addr2[2] & 1; | |
db01a2ea WD |
245 | } |
246 | ||
247 | /* | |
248 | * Prevent writes to uninitialized FLASH. | |
249 | */ | |
250 | if (info->flash_id != FLASH_UNKNOWN) { | |
db01a2ea WD |
251 | addr2 = (FLASH_WORD_SIZE *) info->start[0]; |
252 | *addr2 = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ | |
db01a2ea WD |
253 | } |
254 | ||
255 | return (info->size); | |
256 | } | |
257 | ||
258 | int wait_for_DQ7 (flash_info_t * info, int sect) | |
259 | { | |
260 | ulong start, now, last; | |
261 | volatile FLASH_WORD_SIZE *addr = | |
262 | (FLASH_WORD_SIZE *) (info->start[sect]); | |
263 | ||
264 | start = get_timer (0); | |
265 | last = start; | |
266 | while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) != | |
267 | (FLASH_WORD_SIZE) 0x00800080) { | |
6d0f6bcf | 268 | if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
db01a2ea WD |
269 | printf ("Timeout\n"); |
270 | return -1; | |
271 | } | |
272 | /* show that we're waiting */ | |
273 | if ((now - last) > 1000) { /* every second */ | |
274 | putc ('.'); | |
275 | last = now; | |
276 | } | |
277 | } | |
278 | return 0; | |
279 | } | |
280 | ||
281 | /*----------------------------------------------------------------------- | |
282 | */ | |
283 | ||
284 | int flash_erase (flash_info_t * info, int s_first, int s_last) | |
285 | { | |
286 | volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]); | |
287 | volatile FLASH_WORD_SIZE *addr2; | |
8e119b03 | 288 | int flag, prot, sect; |
db01a2ea WD |
289 | int i; |
290 | ||
291 | if ((s_first < 0) || (s_first > s_last)) { | |
292 | if (info->flash_id == FLASH_UNKNOWN) { | |
293 | printf ("- missing\n"); | |
294 | } else { | |
295 | printf ("- no sectors to erase\n"); | |
296 | } | |
297 | return 1; | |
298 | } | |
299 | ||
300 | if (info->flash_id == FLASH_UNKNOWN) { | |
301 | printf ("Can't erase unknown flash type - aborted\n"); | |
302 | return 1; | |
303 | } | |
304 | ||
305 | prot = 0; | |
306 | for (sect = s_first; sect <= s_last; ++sect) { | |
307 | if (info->protect[sect]) { | |
308 | prot++; | |
309 | } | |
310 | } | |
311 | ||
312 | if (prot) { | |
313 | printf ("- Warning: %d protected sectors will not be erased!\n", prot); | |
314 | } else { | |
315 | printf ("\n"); | |
316 | } | |
317 | ||
db01a2ea WD |
318 | /* Disable interrupts which might cause a timeout here */ |
319 | flag = disable_interrupts (); | |
320 | ||
321 | /* Start erase on unprotected sectors */ | |
322 | for (sect = s_first; sect <= s_last; sect++) { | |
323 | if (info->protect[sect] == 0) { /* not protected */ | |
324 | addr2 = (FLASH_WORD_SIZE *) (info->start[sect]); | |
325 | printf ("Erasing sector %p\n", addr2); /* CLH */ | |
326 | ||
327 | if ((info->flash_id & FLASH_VENDMASK) == | |
328 | FLASH_MAN_SST) { | |
329 | addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; | |
330 | addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; | |
331 | addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; | |
332 | addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; | |
333 | addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; | |
334 | addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */ | |
335 | for (i = 0; i < 50; i++) | |
336 | udelay (1000); /* wait 1 ms */ | |
337 | } else { | |
338 | addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; | |
339 | addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; | |
340 | addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; | |
341 | addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; | |
342 | addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; | |
343 | addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */ | |
344 | } | |
db01a2ea WD |
345 | /* |
346 | * Wait for each sector to complete, it's more | |
347 | * reliable. According to AMD Spec, you must | |
348 | * issue all erase commands within a specified | |
349 | * timeout. This has been seen to fail, especially | |
350 | * if printf()s are included (for debug)!! | |
351 | */ | |
352 | wait_for_DQ7 (info, sect); | |
353 | } | |
354 | } | |
355 | ||
356 | /* re-enable interrupts if necessary */ | |
357 | if (flag) | |
358 | enable_interrupts (); | |
359 | ||
360 | /* wait at least 80us - let's wait 1 ms */ | |
361 | udelay (1000); | |
362 | ||
db01a2ea WD |
363 | /* reset to read mode */ |
364 | addr = (FLASH_WORD_SIZE *) info->start[0]; | |
365 | addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ | |
366 | ||
367 | printf (" done\n"); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | /*----------------------------------------------------------------------- | |
372 | * Copy memory to flash, returns: | |
373 | * 0 - OK | |
374 | * 1 - write timeout | |
375 | * 2 - Flash not erased | |
376 | */ | |
377 | ||
378 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
379 | { | |
380 | ulong cp, wp, data; | |
381 | int i, l, rc; | |
382 | ||
383 | wp = (addr & ~3); /* get lower word aligned address */ | |
384 | ||
385 | /* | |
386 | * handle unaligned start bytes | |
387 | */ | |
388 | if ((l = addr - wp) != 0) { | |
389 | data = 0; | |
390 | for (i = 0, cp = wp; i < l; ++i, ++cp) { | |
391 | data = (data << 8) | (*(uchar *) cp); | |
392 | } | |
393 | for (; i < 4 && cnt > 0; ++i) { | |
394 | data = (data << 8) | *src++; | |
395 | --cnt; | |
396 | ++cp; | |
397 | } | |
398 | for (; cnt == 0 && i < 4; ++i, ++cp) { | |
399 | data = (data << 8) | (*(uchar *) cp); | |
400 | } | |
401 | ||
402 | if ((rc = write_word (info, wp, data)) != 0) { | |
403 | return (rc); | |
404 | } | |
405 | wp += 4; | |
406 | } | |
407 | ||
408 | /* | |
409 | * handle word aligned part | |
410 | */ | |
411 | while (cnt >= 4) { | |
412 | data = 0; | |
413 | for (i = 0; i < 4; ++i) { | |
414 | data = (data << 8) | *src++; | |
415 | } | |
416 | if ((rc = write_word (info, wp, data)) != 0) { | |
417 | return (rc); | |
418 | } | |
419 | wp += 4; | |
420 | cnt -= 4; | |
421 | } | |
422 | ||
423 | if (cnt == 0) { | |
424 | return (0); | |
425 | } | |
426 | ||
427 | /* | |
428 | * handle unaligned tail bytes | |
429 | */ | |
430 | data = 0; | |
431 | for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) { | |
432 | data = (data << 8) | *src++; | |
433 | --cnt; | |
434 | } | |
435 | for (; i < 4; ++i, ++cp) { | |
436 | data = (data << 8) | (*(uchar *) cp); | |
437 | } | |
438 | ||
439 | return (write_word (info, wp, data)); | |
440 | } | |
441 | ||
442 | /*----------------------------------------------------------------------- | |
443 | * Write a word to Flash, returns: | |
444 | * 0 - OK | |
445 | * 1 - write timeout | |
446 | * 2 - Flash not erased | |
447 | */ | |
448 | static int write_word (flash_info_t * info, ulong dest, ulong data) | |
449 | { | |
450 | volatile FLASH_WORD_SIZE *addr2 = | |
451 | (FLASH_WORD_SIZE *) (info->start[0]); | |
452 | volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest; | |
453 | volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data; | |
454 | ulong start; | |
455 | int i; | |
456 | ||
457 | /* Check if Flash is (sufficiently) erased */ | |
458 | if ((*((volatile FLASH_WORD_SIZE *) dest) & | |
6bdd1377 | 459 | (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) { |
db01a2ea WD |
460 | return (2); |
461 | } | |
462 | ||
463 | for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) { | |
464 | int flag; | |
465 | ||
466 | /* Disable interrupts which might cause a timeout here */ | |
467 | flag = disable_interrupts (); | |
468 | ||
469 | addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; | |
470 | addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; | |
471 | addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0; | |
472 | ||
473 | dest2[i] = data2[i]; | |
474 | ||
475 | /* re-enable interrupts if necessary */ | |
476 | if (flag) | |
477 | enable_interrupts (); | |
478 | ||
479 | /* data polling for D7 */ | |
480 | start = get_timer (0); | |
481 | while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) != | |
482 | (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) { | |
483 | ||
6d0f6bcf | 484 | if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
db01a2ea WD |
485 | return (1); |
486 | } | |
487 | } | |
488 | } | |
489 | ||
490 | return (0); | |
491 | } |