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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 | ||
27 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ | |
28 | ||
29 | #if defined(CFG_ENV_IS_IN_FLASH) | |
30 | # ifndef CFG_ENV_ADDR | |
31 | # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) | |
32 | # endif | |
33 | # ifndef CFG_ENV_SIZE | |
34 | # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE | |
35 | # endif | |
36 | # ifndef CFG_ENV_SECT_SIZE | |
37 | # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE | |
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_word (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 | { | |
53 | volatile immap_t *immap = (immap_t *)CFG_IMMR; | |
54 | volatile memctl8xx_t *memctl = &immap->im_memctl; | |
55 | volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE; | |
56 | unsigned long size; | |
57 | int i; | |
58 | ||
59 | /* Init: enable write, | |
60 | * or we cannot even write flash commands | |
61 | */ | |
62 | bcsr->bd_ctrl |= BD_CTRL_FLWE; | |
63 | ||
64 | for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { | |
65 | flash_info[i].flash_id = FLASH_UNKNOWN; | |
66 | } | |
67 | ||
68 | /* Static FLASH Bank configuration here - FIXME XXX */ | |
69 | ||
70 | size = flash_get_size((vu_long *)FLASH_BASE, &flash_info[0]); | |
71 | ||
72 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { | |
73 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", | |
74 | size, size<<20); | |
75 | } | |
76 | ||
77 | /* Remap FLASH according to real size */ | |
78 | memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000); | |
79 | memctl->memc_br1 = (CFG_FLASH_BASE & BR_BA_MSK) | | |
80 | (memctl->memc_br1 & ~(BR_BA_MSK)); | |
81 | ||
82 | /* Re-do sizing to get full correct info */ | |
83 | size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]); | |
84 | ||
85 | flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); | |
86 | ||
87 | flash_info[0].size = size; | |
88 | ||
89 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE | |
90 | /* monitor protection ON by default */ | |
91 | flash_protect(FLAG_PROTECT_SET, | |
92 | CFG_MONITOR_BASE, | |
3b57fe0a | 93 | CFG_MONITOR_BASE+monitor_flash_len-1, |
affae2bf WD |
94 | &flash_info[0]); |
95 | #endif | |
96 | ||
97 | #ifdef CFG_ENV_IS_IN_FLASH | |
98 | /* ENV protection ON by default */ | |
99 | flash_protect(FLAG_PROTECT_SET, | |
100 | CFG_ENV_ADDR, | |
101 | CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, | |
102 | &flash_info[0]); | |
103 | #endif | |
104 | return (size); | |
105 | } | |
106 | ||
107 | /*----------------------------------------------------------------------- | |
108 | */ | |
109 | static void flash_get_offsets (ulong base, flash_info_t *info) | |
110 | { | |
111 | int i; | |
112 | ||
113 | /* all possible flash types | |
114 | * (28F016SV, 28F160S3, 28F320S3) | |
115 | * have the same erase block size: 64 kB per chip, | |
116 | * of 128 kB per bank | |
117 | */ | |
118 | ||
119 | /* set up sector start address table */ | |
120 | for (i = 0; i < info->sector_count; i++) { | |
121 | info->start[i] = base; | |
122 | base += 0x00020000; | |
123 | } | |
124 | } | |
125 | ||
126 | /*----------------------------------------------------------------------- | |
127 | */ | |
128 | void flash_print_info (flash_info_t *info) | |
129 | { | |
130 | int i; | |
131 | ||
132 | if (info->flash_id == FLASH_UNKNOWN) { | |
133 | printf ("missing or unknown FLASH type\n"); | |
134 | return; | |
135 | } | |
136 | ||
137 | switch (info->flash_id & FLASH_VENDMASK) { | |
138 | case FLASH_MAN_INTEL: printf ("Intel "); break; | |
139 | default: printf ("Unknown Vendor "); break; | |
140 | } | |
141 | ||
142 | switch (info->flash_id & FLASH_TYPEMASK) { | |
143 | case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n"); | |
144 | break; | |
145 | case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n"); | |
146 | break; | |
147 | case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\n"); | |
148 | break; | |
149 | default: printf ("Unknown Chip Type\n"); | |
150 | break; | |
151 | } | |
152 | ||
153 | printf (" Size: %ld MB in %d Sectors\n", | |
154 | info->size >> 20, info->sector_count); | |
155 | ||
156 | printf (" Sector Start Addresses:"); | |
157 | for (i=0; i<info->sector_count; ++i) { | |
158 | if ((i % 5) == 0) | |
159 | printf ("\n "); | |
160 | printf (" %08lX%s", | |
161 | info->start[i], | |
162 | info->protect[i] ? " (RO)" : " " | |
163 | ); | |
164 | } | |
165 | printf ("\n"); | |
166 | return; | |
167 | } | |
168 | ||
169 | /*----------------------------------------------------------------------- | |
170 | */ | |
171 | ||
172 | ||
173 | /*----------------------------------------------------------------------- | |
174 | */ | |
175 | ||
176 | /* | |
177 | * The following code cannot be run from FLASH! | |
178 | */ | |
179 | ||
180 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) | |
181 | { | |
182 | short i; | |
183 | ulong value; | |
184 | ulong base = (ulong)addr; | |
185 | ||
186 | /* Write "Intelligent Identifier" command: read Manufacturer ID */ | |
187 | *addr = 0x90909090; | |
188 | ||
189 | value = addr[0]; | |
190 | switch (value) { | |
191 | case (MT_MANUFACT & 0x00FF00FF): /* MT or => Intel */ | |
192 | case (INTEL_ALT_MANU & 0x00FF00FF): | |
193 | info->flash_id = FLASH_MAN_INTEL; | |
194 | break; | |
195 | default: | |
196 | info->flash_id = FLASH_UNKNOWN; | |
197 | info->sector_count = 0; | |
198 | info->size = 0; | |
199 | return (0); /* no or unknown flash */ | |
200 | } | |
201 | ||
202 | value = addr[1]; /* device ID */ | |
203 | ||
204 | switch (value) { | |
205 | case (INTEL_ID_28F016S): | |
206 | info->flash_id += FLASH_28F016SV; | |
207 | info->sector_count = 32; | |
208 | info->size = 0x00400000; | |
209 | break; /* => 2x2 MB */ | |
210 | ||
211 | case (INTEL_ID_28F160S3): | |
212 | info->flash_id += FLASH_28F160S3; | |
213 | info->sector_count = 32; | |
214 | info->size = 0x00400000; | |
215 | break; /* => 2x2 MB */ | |
216 | ||
217 | case (INTEL_ID_28F320S3): | |
218 | info->flash_id += FLASH_28F320S3; | |
219 | info->sector_count = 64; | |
220 | info->size = 0x00800000; | |
221 | break; /* => 2x4 MB */ | |
222 | ||
223 | default: | |
224 | info->flash_id = FLASH_UNKNOWN; | |
225 | return (0); /* => no or unknown flash */ | |
226 | ||
227 | } | |
228 | ||
229 | /* set up sector start address table */ | |
230 | for (i = 0; i < info->sector_count; i++) { | |
231 | info->start[i] = base + (i * 0x00020000); | |
232 | /* don't know how to check sector protection */ | |
233 | info->protect[i] = 0; | |
234 | } | |
235 | ||
236 | /* | |
237 | * Prevent writes to uninitialized FLASH. | |
238 | */ | |
239 | if (info->flash_id != FLASH_UNKNOWN) { | |
240 | addr = (vu_long *)info->start[0]; | |
241 | ||
242 | *addr = 0xFFFFFF; /* reset bank to read array mode */ | |
243 | } | |
244 | ||
245 | return (info->size); | |
246 | } | |
247 | ||
248 | ||
249 | /*----------------------------------------------------------------------- | |
250 | */ | |
251 | ||
252 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
253 | { | |
254 | int flag, prot, sect; | |
255 | ulong start, now, last; | |
256 | ||
257 | if ((s_first < 0) || (s_first > s_last)) { | |
258 | if (info->flash_id == FLASH_UNKNOWN) { | |
259 | printf ("- missing\n"); | |
260 | } else { | |
261 | printf ("- no sectors to erase\n"); | |
262 | } | |
263 | return 1; | |
264 | } | |
265 | ||
266 | if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) { | |
267 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
268 | info->flash_id); | |
269 | return 1; | |
270 | } | |
271 | ||
272 | prot = 0; | |
273 | for (sect=s_first; sect<=s_last; ++sect) { | |
274 | if (info->protect[sect]) { | |
275 | prot++; | |
276 | } | |
277 | } | |
278 | ||
279 | if (prot) { | |
280 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
281 | prot); | |
282 | } else { | |
283 | printf ("\n"); | |
284 | } | |
285 | ||
286 | start = get_timer (0); | |
287 | last = start; | |
288 | ||
289 | /* Start erase on unprotected sectors */ | |
290 | for (sect = s_first; sect<=s_last; sect++) { | |
291 | if (info->protect[sect] == 0) { /* not protected */ | |
292 | vu_long *addr = (vu_long *)(info->start[sect]); | |
293 | ||
294 | /* Disable interrupts which might cause a timeout here */ | |
295 | flag = disable_interrupts(); | |
296 | ||
297 | /* Single Block Erase Command */ | |
298 | *addr = 0x20202020; | |
299 | /* Confirm */ | |
300 | *addr = 0xD0D0D0D0; | |
301 | /* Resume Command, as per errata update */ | |
302 | *addr = 0xD0D0D0D0; | |
303 | ||
304 | /* re-enable interrupts if necessary */ | |
305 | if (flag) | |
306 | enable_interrupts(); | |
307 | ||
308 | /* wait at least 80us - let's wait 1 ms */ | |
309 | udelay (1000); | |
310 | ||
311 | while ((*addr & 0x00800080) != 0x00800080) { | |
312 | if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { | |
313 | printf ("Timeout\n"); | |
314 | *addr = 0xFFFFFFFF; /* reset bank */ | |
315 | return 1; | |
316 | } | |
317 | /* show that we're waiting */ | |
318 | if ((now - last) > 1000) { /* every second */ | |
319 | putc ('.'); | |
320 | last = now; | |
321 | } | |
322 | } | |
323 | ||
324 | /* reset to read mode */ | |
325 | *addr = 0xFFFFFFFF; | |
326 | } | |
327 | } | |
328 | ||
329 | printf (" done\n"); | |
330 | return 0; | |
331 | } | |
332 | ||
333 | /*----------------------------------------------------------------------- | |
334 | * Copy memory to flash, returns: | |
335 | * 0 - OK | |
336 | * 1 - write timeout | |
337 | * 2 - Flash not erased | |
338 | */ | |
339 | ||
340 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
341 | { | |
342 | ulong cp, wp, data; | |
343 | int i, l, rc; | |
344 | ||
345 | wp = (addr & ~3); /* get lower word aligned address */ | |
346 | ||
347 | /* | |
348 | * handle unaligned start bytes | |
349 | */ | |
350 | if ((l = addr - wp) != 0) { | |
351 | data = 0; | |
352 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
353 | data = (data << 8) | (*(uchar *)cp); | |
354 | } | |
355 | for (; i<4 && cnt>0; ++i) { | |
356 | data = (data << 8) | *src++; | |
357 | --cnt; | |
358 | ++cp; | |
359 | } | |
360 | for (; cnt==0 && i<4; ++i, ++cp) { | |
361 | data = (data << 8) | (*(uchar *)cp); | |
362 | } | |
363 | ||
364 | if ((rc = write_word(info, wp, data)) != 0) { | |
365 | return (rc); | |
366 | } | |
367 | wp += 4; | |
368 | } | |
369 | ||
370 | /* | |
371 | * handle word aligned part | |
372 | */ | |
373 | while (cnt >= 4) { | |
374 | data = 0; | |
375 | for (i=0; i<4; ++i) { | |
376 | data = (data << 8) | *src++; | |
377 | } | |
378 | if ((rc = write_word(info, wp, data)) != 0) { | |
379 | return (rc); | |
380 | } | |
381 | wp += 4; | |
382 | cnt -= 4; | |
383 | } | |
384 | ||
385 | if (cnt == 0) { | |
386 | return (0); | |
387 | } | |
388 | ||
389 | /* | |
390 | * handle unaligned tail bytes | |
391 | */ | |
392 | data = 0; | |
393 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
394 | data = (data << 8) | *src++; | |
395 | --cnt; | |
396 | } | |
397 | for (; i<4; ++i, ++cp) { | |
398 | data = (data << 8) | (*(uchar *)cp); | |
399 | } | |
400 | ||
401 | return (write_word(info, wp, data)); | |
402 | } | |
403 | ||
404 | /*----------------------------------------------------------------------- | |
405 | * Write a word to Flash, returns: | |
406 | * 0 - OK | |
407 | * 1 - write timeout | |
408 | * 2 - Flash not erased | |
409 | */ | |
410 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
411 | { | |
412 | vu_long *addr = (vu_long *)dest; | |
413 | ulong start, csr; | |
414 | int flag; | |
415 | ||
416 | /* Check if Flash is (sufficiently) erased */ | |
417 | if ((*addr & data) != data) { | |
418 | return (2); | |
419 | } | |
420 | /* Disable interrupts which might cause a timeout here */ | |
421 | flag = disable_interrupts(); | |
422 | ||
423 | /* Write Command */ | |
424 | *addr = 0x10101010; | |
425 | ||
426 | /* Write Data */ | |
427 | *addr = data; | |
428 | ||
429 | /* re-enable interrupts if necessary */ | |
430 | if (flag) | |
431 | enable_interrupts(); | |
432 | ||
433 | /* data polling for D7 */ | |
434 | start = get_timer (0); | |
435 | flag = 0; | |
436 | while (((csr = *addr) & 0x00800080) != 0x00800080) { | |
437 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { | |
438 | flag = 1; | |
439 | break; | |
440 | } | |
441 | } | |
442 | if (csr & 0x00400040) { | |
443 | printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr); | |
444 | flag = 1; | |
445 | } | |
446 | ||
447 | /* Clear Status Registers Command */ | |
448 | *addr = 0x50505050; | |
449 | /* Reset to read array mode */ | |
450 | *addr = 0xFFFFFFFF; | |
451 | ||
452 | return (flag); | |
453 | } | |
454 | ||
455 | /*----------------------------------------------------------------------- | |
456 | */ |