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89930721 WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net | |
4 | * | |
5 | * (C) Copyright 2001 | |
6 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
7 | * | |
8 | * See file CREDITS for list of people who contributed to this | |
9 | * project. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License as | |
13 | * published by the Free Software Foundation; either version 2 of | |
14 | * the License, or (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
24 | * MA 02111-1307 USA | |
25 | */ | |
26 | ||
27 | #include <common.h> | |
28 | #include <mpc8xx.h> | |
29 | ||
30 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ | |
31 | ||
32 | #if defined(CFG_ENV_IS_IN_FLASH) | |
33 | # ifndef CFG_ENV_ADDR | |
34 | # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) | |
35 | # endif | |
36 | # ifndef CFG_ENV_SIZE | |
37 | # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE | |
38 | # endif | |
39 | # ifndef CFG_ENV_SECT_SIZE | |
40 | # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE | |
41 | # endif | |
42 | #endif | |
43 | ||
44 | /*----------------------------------------------------------------------- | |
45 | * Protection Flags: | |
46 | */ | |
47 | #define FLAG_PROTECT_SET 0x01 | |
48 | #define FLAG_PROTECT_CLEAR 0x02 | |
49 | ||
50 | /* Board support for 1 or 2 flash devices */ | |
51 | #undef FLASH_PORT_WIDTH32 | |
52 | #define FLASH_PORT_WIDTH16 | |
53 | ||
54 | #ifdef FLASH_PORT_WIDTH16 | |
55 | #define FLASH_PORT_WIDTH ushort | |
56 | #define FLASH_PORT_WIDTHV vu_short | |
57 | #else | |
58 | #define FLASH_PORT_WIDTH ulong | |
59 | #define FLASH_PORT_WIDTHV vu_long | |
60 | #endif | |
61 | ||
62 | #define FPW FLASH_PORT_WIDTH | |
63 | #define FPWV FLASH_PORT_WIDTHV | |
64 | ||
65 | /*----------------------------------------------------------------------- | |
66 | * Functions | |
67 | */ | |
68 | static ulong flash_get_size (FPW *addr, flash_info_t *info); | |
69 | static int write_data (flash_info_t *info, ulong dest, FPW data); | |
70 | static void flash_get_offsets (ulong base, flash_info_t *info); | |
71 | ||
72 | /*----------------------------------------------------------------------- | |
73 | */ | |
74 | ||
75 | unsigned long flash_init (void) | |
76 | { | |
77 | volatile immap_t *immap = (immap_t *)CFG_IMMR; | |
78 | volatile memctl8xx_t *memctl = &immap->im_memctl; | |
79 | unsigned long size_b0; | |
80 | int i; | |
81 | ||
82 | /* Init: no FLASHes known */ | |
83 | for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { | |
84 | flash_info[i].flash_id = FLASH_UNKNOWN; | |
85 | } | |
86 | ||
87 | /* Static FLASH Bank configuration here - FIXME XXX */ | |
88 | size_b0 = flash_get_size((FPW *)FLASH_BASE0_PRELIM, &flash_info[0]); | |
89 | ||
90 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { | |
91 | printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", | |
92 | size_b0, size_b0<<20); | |
93 | } | |
94 | ||
95 | /* Remap FLASH according to real size */ | |
96 | memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000); | |
97 | memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V; | |
98 | ||
99 | /* Re-do sizing to get full correct info */ | |
100 | size_b0 = flash_get_size((FPW *)CFG_FLASH_BASE, &flash_info[0]); | |
101 | ||
102 | flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); | |
103 | ||
104 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE | |
105 | /* monitor protection ON by default */ | |
106 | (void)flash_protect(FLAG_PROTECT_SET, | |
107 | CFG_FLASH_BASE, | |
108 | CFG_FLASH_BASE+CFG_MONITOR_LEN-1, | |
109 | &flash_info[0]); | |
110 | #endif | |
111 | ||
112 | #ifdef CFG_ENV_IS_IN_FLASH | |
113 | /* ENV protection ON by default */ | |
114 | flash_protect(FLAG_PROTECT_SET, | |
115 | CFG_ENV_ADDR, | |
116 | CFG_ENV_ADDR+CFG_ENV_SIZE-1, | |
117 | &flash_info[0]); | |
118 | #endif | |
119 | ||
120 | flash_info[0].size = size_b0; | |
121 | ||
122 | return (size_b0); | |
123 | } | |
124 | ||
125 | /*----------------------------------------------------------------------- | |
126 | */ | |
127 | static void flash_get_offsets (ulong base, flash_info_t *info) | |
128 | { | |
129 | int i; | |
130 | ||
131 | if (info->flash_id == FLASH_UNKNOWN) { | |
132 | return; | |
133 | } | |
134 | ||
135 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { | |
136 | for (i = 0; i < info->sector_count; i++) { | |
137 | info->start[i] = base + (i * 0x00020000); | |
138 | } | |
139 | } | |
140 | } | |
141 | ||
142 | /*----------------------------------------------------------------------- | |
143 | */ | |
144 | void flash_print_info (flash_info_t *info) | |
145 | { | |
146 | int i; | |
147 | ||
148 | if (info->flash_id == FLASH_UNKNOWN) { | |
149 | printf ("missing or unknown FLASH type\n"); | |
150 | return; | |
151 | } | |
152 | ||
153 | switch (info->flash_id & FLASH_VENDMASK) { | |
154 | case FLASH_MAN_INTEL: printf ("INTEL "); break; | |
155 | default: printf ("Unknown Vendor "); break; | |
156 | } | |
157 | ||
158 | switch (info->flash_id & FLASH_TYPEMASK) { | |
159 | case FLASH_28F320J3A: | |
160 | printf ("28F320J3A\n"); break; | |
161 | case FLASH_28F640J3A: | |
162 | printf ("28F640J3A\n"); break; | |
163 | case FLASH_28F128J3A: | |
164 | printf ("28F128J3A\n"); break; | |
165 | default: printf ("Unknown Chip Type\n"); break; | |
166 | } | |
167 | ||
168 | printf (" Size: %ld MB in %d Sectors\n", | |
169 | info->size >> 20, info->sector_count); | |
170 | ||
171 | printf (" Sector Start Addresses:"); | |
172 | for (i=0; i<info->sector_count; ++i) { | |
173 | if ((i % 5) == 0) | |
174 | printf ("\n "); | |
175 | printf (" %08lX%s", | |
176 | info->start[i], | |
177 | info->protect[i] ? " (RO)" : " " | |
178 | ); | |
179 | } | |
180 | printf ("\n"); | |
181 | return; | |
182 | } | |
183 | ||
184 | /*----------------------------------------------------------------------- | |
185 | */ | |
186 | ||
187 | ||
188 | /*----------------------------------------------------------------------- | |
189 | */ | |
190 | ||
191 | /* | |
192 | * The following code cannot be run from FLASH! | |
193 | */ | |
194 | ||
195 | static ulong flash_get_size (FPW *addr, flash_info_t *info) | |
196 | { | |
197 | FPW value; | |
198 | ||
199 | /* Write auto select command: read Manufacturer ID */ | |
200 | addr[0x5555] = (FPW)0x00AA00AA; | |
201 | addr[0x2AAA] = (FPW)0x00550055; | |
202 | addr[0x5555] = (FPW)0x00900090; | |
203 | ||
204 | value = addr[0]; | |
205 | ||
206 | switch (value) { | |
207 | case (FPW)INTEL_MANUFACT: | |
208 | info->flash_id = FLASH_MAN_INTEL; | |
209 | break; | |
210 | default: | |
211 | info->flash_id = FLASH_UNKNOWN; | |
212 | info->sector_count = 0; | |
213 | info->size = 0; | |
214 | addr[0] = (FPW)0x00FF00FF; /* restore read mode */ | |
215 | return (0); /* no or unknown flash */ | |
216 | } | |
217 | ||
218 | value = addr[1]; /* device ID */ | |
219 | ||
220 | switch (value) { | |
221 | case (FPW)INTEL_ID_28F320J3A: | |
222 | info->flash_id += FLASH_28F320J3A; | |
223 | info->sector_count = 32; | |
224 | info->size = 0x00400000; | |
225 | break; /* => 4 MB */ | |
226 | ||
227 | case (FPW)INTEL_ID_28F640J3A: | |
228 | info->flash_id += FLASH_28F640J3A; | |
229 | info->sector_count = 64; | |
230 | info->size = 0x00800000; | |
231 | break; /* => 8 MB */ | |
232 | ||
233 | case (FPW)INTEL_ID_28F128J3A: | |
234 | info->flash_id += FLASH_28F128J3A; | |
235 | info->sector_count = 128; | |
236 | info->size = 0x01000000; | |
237 | break; /* => 16 MB */ | |
238 | ||
239 | default: | |
240 | info->flash_id = FLASH_UNKNOWN; | |
241 | break; | |
242 | } | |
243 | ||
244 | if (info->sector_count > CFG_MAX_FLASH_SECT) { | |
245 | printf ("** ERROR: sector count %d > max (%d) **\n", | |
246 | info->sector_count, CFG_MAX_FLASH_SECT); | |
247 | info->sector_count = CFG_MAX_FLASH_SECT; | |
248 | } | |
249 | ||
250 | addr[0] = (FPW)0x00FF00FF; /* restore read mode */ | |
251 | ||
252 | return (info->size); | |
253 | } | |
254 | ||
255 | ||
256 | /*----------------------------------------------------------------------- | |
257 | */ | |
258 | ||
259 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
260 | { | |
261 | int flag, prot, sect; | |
262 | ulong type, start, now, last; | |
263 | int rcode = 0; | |
264 | ||
265 | if ((s_first < 0) || (s_first > s_last)) { | |
266 | if (info->flash_id == FLASH_UNKNOWN) { | |
267 | printf ("- missing\n"); | |
268 | } else { | |
269 | printf ("- no sectors to erase\n"); | |
270 | } | |
271 | return 1; | |
272 | } | |
273 | ||
274 | type = (info->flash_id & FLASH_VENDMASK); | |
275 | if ((type != FLASH_MAN_INTEL)) { | |
276 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
277 | info->flash_id); | |
278 | return 1; | |
279 | } | |
280 | ||
281 | prot = 0; | |
282 | for (sect=s_first; sect<=s_last; ++sect) { | |
283 | if (info->protect[sect]) { | |
284 | prot++; | |
285 | } | |
286 | } | |
287 | ||
288 | if (prot) { | |
289 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
290 | prot); | |
291 | } else { | |
292 | printf ("\n"); | |
293 | } | |
294 | ||
295 | start = get_timer (0); | |
296 | last = start; | |
297 | /* Start erase on unprotected sectors */ | |
298 | for (sect = s_first; sect<=s_last; sect++) { | |
299 | if (info->protect[sect] == 0) { /* not protected */ | |
300 | FPWV *addr = (FPWV *)(info->start[sect]); | |
301 | FPW status; | |
302 | ||
303 | /* Disable interrupts which might cause a timeout here */ | |
304 | flag = disable_interrupts(); | |
305 | ||
306 | *addr = (FPW)0x00500050; /* clear status register */ | |
307 | *addr = (FPW)0x00200020; /* erase setup */ | |
308 | *addr = (FPW)0x00D000D0; /* erase confirm */ | |
309 | ||
310 | /* re-enable interrupts if necessary */ | |
311 | if (flag) | |
312 | enable_interrupts(); | |
313 | ||
314 | /* wait at least 80us - let's wait 1 ms */ | |
315 | udelay (1000); | |
316 | ||
317 | while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) { | |
318 | if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { | |
319 | printf ("Timeout\n"); | |
320 | *addr = (FPW)0x00B000B0; /* suspend erase */ | |
321 | *addr = (FPW)0x00FF00FF; /* reset to read mode */ | |
322 | rcode = 1; | |
323 | break; | |
324 | } | |
325 | ||
326 | /* show that we're waiting */ | |
327 | if ((now - last) > 1000) { /* every second */ | |
328 | putc ('.'); | |
329 | last = now; | |
330 | } | |
331 | } | |
332 | ||
333 | *addr = (FPW)0x00FF00FF; /* reset to read mode */ | |
334 | } | |
335 | } | |
336 | printf (" done\n"); | |
337 | return rcode; | |
338 | } | |
339 | ||
340 | /*----------------------------------------------------------------------- | |
341 | * Copy memory to flash, returns: | |
342 | * 0 - OK | |
343 | * 1 - write timeout | |
344 | * 2 - Flash not erased | |
345 | * 4 - Flash not identified | |
346 | */ | |
347 | ||
348 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
349 | { | |
350 | ulong cp, wp; | |
351 | FPW data; | |
352 | #if 0 | |
353 | int count, i, l, rc, port_width; | |
354 | #else | |
355 | int i, l, rc, port_width; | |
356 | #endif | |
357 | ||
358 | if (info->flash_id == FLASH_UNKNOWN) { | |
359 | return 4; | |
360 | } | |
361 | /* get lower word aligned address */ | |
362 | #ifdef FLASH_PORT_WIDTH16 | |
363 | wp = (addr & ~1); | |
364 | port_width = 2; | |
365 | #else | |
366 | wp = (addr & ~3); | |
367 | port_width = 4; | |
368 | #endif | |
369 | ||
370 | /* | |
371 | * handle unaligned start bytes | |
372 | */ | |
373 | if ((l = addr - wp) != 0) { | |
374 | data = 0; | |
375 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
376 | data = (data << 8) | (*(uchar *)cp); | |
377 | } | |
378 | for (; i<port_width && cnt>0; ++i) { | |
379 | data = (data << 8) | *src++; | |
380 | --cnt; | |
381 | ++cp; | |
382 | } | |
383 | for (; cnt==0 && i<port_width; ++i, ++cp) { | |
384 | data = (data << 8) | (*(uchar *)cp); | |
385 | } | |
386 | ||
387 | if ((rc = write_data(info, wp, data)) != 0) { | |
388 | return (rc); | |
389 | } | |
390 | wp += port_width; | |
391 | } | |
392 | ||
393 | /* | |
394 | * handle word aligned part | |
395 | */ | |
396 | #if 0 | |
397 | count = 0; | |
398 | #endif | |
399 | while (cnt >= port_width) { | |
400 | data = 0; | |
401 | for (i=0; i<port_width; ++i) { | |
402 | data = (data << 8) | *src++; | |
403 | } | |
404 | if ((rc = write_data(info, wp, data)) != 0) { | |
405 | return (rc); | |
406 | } | |
407 | wp += port_width; | |
408 | cnt -= port_width; | |
409 | #if 0 | |
410 | if (count++ > 0x20000) | |
411 | { | |
412 | putc('.'); | |
413 | count = 0; | |
414 | } | |
415 | #endif | |
416 | } | |
417 | ||
418 | if (cnt == 0) { | |
419 | return (0); | |
420 | } | |
421 | ||
422 | /* | |
423 | * handle unaligned tail bytes | |
424 | */ | |
425 | data = 0; | |
426 | for (i=0, cp=wp; i<port_width && cnt>0; ++i, ++cp) { | |
427 | data = (data << 8) | *src++; | |
428 | --cnt; | |
429 | } | |
430 | for (; i<port_width; ++i, ++cp) { | |
431 | data = (data << 8) | (*(uchar *)cp); | |
432 | } | |
433 | ||
434 | return (write_data(info, wp, data)); | |
435 | } | |
436 | ||
437 | /*----------------------------------------------------------------------- | |
438 | * Write a word or halfword to Flash, returns: | |
439 | * 0 - OK | |
440 | * 1 - write timeout | |
441 | * 2 - Flash not erased | |
442 | */ | |
443 | static int write_data (flash_info_t *info, ulong dest, FPW data) | |
444 | { | |
445 | FPWV *addr = (FPWV *)dest; | |
446 | ulong status; | |
447 | ulong start; | |
448 | int flag; | |
449 | ||
450 | /* Check if Flash is (sufficiently) erased */ | |
451 | if ((*addr & data) != data) { | |
452 | printf("not erased at %08lx (%x)\n",(ulong)addr,*addr); | |
453 | return (2); | |
454 | } | |
455 | /* Disable interrupts which might cause a timeout here */ | |
456 | flag = disable_interrupts(); | |
457 | ||
458 | *addr = (FPW)0x00400040; /* write setup */ | |
459 | *addr = data; | |
460 | ||
461 | /* re-enable interrupts if necessary */ | |
462 | if (flag) | |
463 | enable_interrupts(); | |
464 | ||
465 | start = get_timer (0); | |
466 | ||
467 | while (((status = *addr) & (FPW)0x00800080) != (FPW)0x00800080) { | |
468 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { | |
469 | *addr = (FPW)0x00FF00FF; /* restore read mode */ | |
470 | return (1); | |
471 | } | |
472 | } | |
473 | ||
474 | *addr = (FPW)0x00FF00FF; /* restore read mode */ | |
475 | ||
476 | return (0); | |
477 | } | |
478 |