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ea8015b8 WD |
1 | /* |
2 | * (C) Copyright 2002 | |
3 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
4 | * Marius Groeger <mgroeger@sysgo.de> | |
5 | * | |
6 | * (C) Copyright 2002 | |
792a09eb | 7 | * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> |
ea8015b8 WD |
8 | * |
9 | * See file CREDITS for list of people who contributed to this | |
10 | * project. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of | |
15 | * the License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
25 | * MA 02111-1307 USA | |
26 | */ | |
27 | ||
28 | /* #define DEBUG */ | |
29 | ||
30 | #include <common.h> | |
31 | #include <environment.h> | |
32 | ||
33 | #define FLASH_BANK_SIZE 0x1000000 /* 2 x 8 MB */ | |
34 | #define MAIN_SECT_SIZE 0x40000 /* 2 x 128 kB */ | |
35 | ||
6d0f6bcf | 36 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; |
ea8015b8 WD |
37 | |
38 | ||
39 | #define CMD_READ_ARRAY 0x00FF00FF | |
40 | #define CMD_IDENTIFY 0x00900090 | |
41 | #define CMD_ERASE_SETUP 0x00200020 | |
42 | #define CMD_ERASE_CONFIRM 0x00D000D0 | |
43 | #define CMD_PROGRAM 0x00400040 | |
44 | #define CMD_RESUME 0x00D000D0 | |
45 | #define CMD_SUSPEND 0x00B000B0 | |
46 | #define CMD_STATUS_READ 0x00700070 | |
47 | #define CMD_STATUS_RESET 0x00500050 | |
48 | ||
49 | #define BIT_BUSY 0x00800080 | |
50 | #define BIT_ERASE_SUSPEND 0x00400040 | |
51 | #define BIT_ERASE_ERROR 0x00200020 | |
52 | #define BIT_PROGRAM_ERROR 0x00100010 | |
53 | #define BIT_VPP_RANGE_ERROR 0x00080008 | |
54 | #define BIT_PROGRAM_SUSPEND 0x00040004 | |
55 | #define BIT_PROTECT_ERROR 0x00020002 | |
56 | #define BIT_UNDEFINED 0x00010001 | |
57 | ||
58 | #define BIT_SEQUENCE_ERROR 0x00300030 | |
59 | #define BIT_TIMEOUT 0x80000000 | |
60 | ||
61 | /*----------------------------------------------------------------------- | |
62 | */ | |
63 | ||
64 | ulong flash_init (void) | |
65 | { | |
66 | int i, j; | |
67 | ulong size = 0; | |
68 | ||
6d0f6bcf | 69 | for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
ea8015b8 WD |
70 | ulong flashbase = 0; |
71 | ||
72 | flash_info[i].flash_id = | |
73 | (INTEL_MANUFACT & FLASH_VENDMASK) | | |
74 | (INTEL_ID_28F640J3A & FLASH_TYPEMASK); | |
75 | flash_info[i].size = FLASH_BANK_SIZE; | |
6d0f6bcf JCPV |
76 | flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT; |
77 | memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT); | |
ea8015b8 | 78 | if (i == 0) |
6d0f6bcf | 79 | flashbase = CONFIG_SYS_FLASH_BASE; |
ea8015b8 WD |
80 | else |
81 | panic ("configured too many flash banks!\n"); | |
82 | for (j = 0; j < flash_info[i].sector_count; j++) { | |
83 | flash_info[i].start[j] = flashbase; | |
84 | ||
85 | /* uniform sector size */ | |
86 | flashbase += MAIN_SECT_SIZE; | |
87 | } | |
88 | size += flash_info[i].size; | |
89 | } | |
90 | ||
91 | /* | |
92 | * Protect monitor and environment sectors | |
93 | */ | |
94 | flash_protect ( FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
95 | CONFIG_SYS_FLASH_BASE, |
96 | CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, | |
ea8015b8 WD |
97 | &flash_info[0]); |
98 | ||
99 | flash_protect ( FLAG_PROTECT_SET, | |
0e8d1586 JCPV |
100 | CONFIG_ENV_ADDR, |
101 | CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); | |
ea8015b8 | 102 | |
0e8d1586 | 103 | #ifdef CONFIG_ENV_ADDR_REDUND |
ea8015b8 | 104 | flash_protect ( FLAG_PROTECT_SET, |
0e8d1586 JCPV |
105 | CONFIG_ENV_ADDR_REDUND, |
106 | CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SIZE_REDUND - 1, | |
ea8015b8 WD |
107 | &flash_info[0]); |
108 | #endif | |
109 | ||
110 | return size; | |
111 | } | |
112 | ||
113 | /*----------------------------------------------------------------------- | |
114 | */ | |
115 | void flash_print_info (flash_info_t * info) | |
116 | { | |
117 | int i; | |
118 | ||
119 | switch (info->flash_id & FLASH_VENDMASK) { | |
120 | case (INTEL_MANUFACT & FLASH_VENDMASK): | |
121 | printf ("Intel: "); | |
122 | break; | |
123 | default: | |
124 | printf ("Unknown Vendor "); | |
125 | break; | |
126 | } | |
127 | ||
128 | switch (info->flash_id & FLASH_TYPEMASK) { | |
129 | case (INTEL_ID_28F640J3A & FLASH_TYPEMASK): | |
130 | printf ("2x 28F640J3A (64Mbit)\n"); | |
131 | break; | |
132 | default: | |
133 | printf ("Unknown Chip Type\n"); | |
134 | goto Done; | |
135 | break; | |
136 | } | |
137 | ||
138 | printf (" Size: %ld MB in %d Sectors\n", | |
139 | info->size >> 20, info->sector_count); | |
140 | ||
141 | printf (" Sector Start Addresses:"); | |
142 | for (i = 0; i < info->sector_count; i++) { | |
143 | if ((i % 5) == 0) { | |
144 | printf ("\n "); | |
145 | } | |
146 | printf (" %08lX%s", | |
147 | info->start[i], | |
148 | info->protect[i] ? " (RO)" : " "); | |
149 | } | |
150 | printf ("\n"); | |
151 | ||
e86e5a07 | 152 | Done: ; |
ea8015b8 WD |
153 | } |
154 | ||
155 | /*----------------------------------------------------------------------- | |
156 | */ | |
157 | ||
158 | int flash_error (ulong code) | |
159 | { | |
160 | /* Check bit patterns */ | |
161 | /* SR.7=0 is busy, SR.7=1 is ready */ | |
162 | /* all other flags indicate error on 1 */ | |
163 | /* SR.0 is undefined */ | |
164 | /* Timeout is our faked flag */ | |
165 | ||
166 | /* sequence is described in Intel 290644-005 document */ | |
167 | ||
168 | /* check Timeout */ | |
169 | if (code & BIT_TIMEOUT) { | |
170 | puts ("Timeout\n"); | |
171 | return ERR_TIMOUT; | |
172 | } | |
173 | ||
174 | /* check Busy, SR.7 */ | |
175 | if (~code & BIT_BUSY) { | |
176 | puts ("Busy\n"); | |
177 | return ERR_PROG_ERROR; | |
178 | } | |
179 | ||
180 | /* check Vpp low, SR.3 */ | |
181 | if (code & BIT_VPP_RANGE_ERROR) { | |
182 | puts ("Vpp range error\n"); | |
183 | return ERR_PROG_ERROR; | |
184 | } | |
185 | ||
186 | /* check Device Protect Error, SR.1 */ | |
187 | if (code & BIT_PROTECT_ERROR) { | |
188 | puts ("Device protect error\n"); | |
189 | return ERR_PROG_ERROR; | |
190 | } | |
191 | ||
192 | /* check Command Seq Error, SR.4 & SR.5 */ | |
193 | if (code & BIT_SEQUENCE_ERROR) { | |
194 | puts ("Command seqence error\n"); | |
195 | return ERR_PROG_ERROR; | |
196 | } | |
197 | ||
198 | /* check Block Erase Error, SR.5 */ | |
199 | if (code & BIT_ERASE_ERROR) { | |
200 | puts ("Block erase error\n"); | |
201 | return ERR_PROG_ERROR; | |
202 | } | |
203 | ||
204 | /* check Program Error, SR.4 */ | |
205 | if (code & BIT_PROGRAM_ERROR) { | |
206 | puts ("Program error\n"); | |
207 | return ERR_PROG_ERROR; | |
208 | } | |
209 | ||
210 | /* check Block Erase Suspended, SR.6 */ | |
211 | if (code & BIT_ERASE_SUSPEND) { | |
212 | puts ("Block erase suspended\n"); | |
213 | return ERR_PROG_ERROR; | |
214 | } | |
215 | ||
216 | /* check Program Suspended, SR.2 */ | |
217 | if (code & BIT_PROGRAM_SUSPEND) { | |
218 | puts ("Program suspended\n"); | |
219 | return ERR_PROG_ERROR; | |
220 | } | |
221 | ||
222 | /* OK, no error */ | |
223 | return ERR_OK; | |
224 | } | |
225 | ||
226 | /*----------------------------------------------------------------------- | |
227 | */ | |
228 | ||
229 | int flash_erase (flash_info_t * info, int s_first, int s_last) | |
230 | { | |
231 | ulong result, result1; | |
232 | int iflag, prot, sect; | |
233 | int rc = ERR_OK; | |
234 | ||
235 | #ifdef USE_920T_MMU | |
236 | int cflag; | |
237 | #endif | |
238 | ||
239 | debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last); | |
240 | ||
241 | /* first look for protection bits */ | |
242 | ||
243 | if (info->flash_id == FLASH_UNKNOWN) | |
244 | return ERR_UNKNOWN_FLASH_TYPE; | |
245 | ||
246 | if ((s_first < 0) || (s_first > s_last)) { | |
247 | return ERR_INVAL; | |
248 | } | |
249 | ||
250 | if ((info->flash_id & FLASH_VENDMASK) != | |
251 | (INTEL_MANUFACT & FLASH_VENDMASK)) { | |
252 | return ERR_UNKNOWN_FLASH_VENDOR; | |
253 | } | |
254 | ||
255 | prot = 0; | |
256 | for (sect = s_first; sect <= s_last; ++sect) { | |
257 | if (info->protect[sect]) { | |
258 | prot++; | |
259 | } | |
260 | } | |
261 | ||
262 | if (prot) { | |
263 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
264 | prot); | |
265 | } else { | |
266 | printf ("\n"); | |
267 | } | |
268 | ||
269 | /* | |
270 | * Disable interrupts which might cause a timeout | |
271 | * here. Remember that our exception vectors are | |
272 | * at address 0 in the flash, and we don't want a | |
273 | * (ticker) exception to happen while the flash | |
274 | * chip is in programming mode. | |
275 | */ | |
276 | #ifdef USE_920T_MMU | |
277 | cflag = dcache_status (); | |
278 | dcache_disable (); | |
279 | #endif | |
280 | iflag = disable_interrupts (); | |
281 | ||
282 | /* Start erase on unprotected sectors */ | |
283 | for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { | |
284 | ||
285 | debug ("Erasing sector %2d @ %08lX... ", | |
286 | sect, info->start[sect]); | |
287 | ||
288 | /* arm simple, non interrupt dependent timer */ | |
289 | reset_timer_masked (); | |
290 | ||
291 | if (info->protect[sect] == 0) { /* not protected */ | |
292 | vu_long *addr = (vu_long *) (info->start[sect]); | |
293 | ulong bsR7, bsR7_2, bsR5, bsR5_2; | |
294 | ||
295 | /* *addr = CMD_STATUS_RESET; */ | |
296 | *addr = CMD_ERASE_SETUP; | |
297 | *addr = CMD_ERASE_CONFIRM; | |
298 | ||
299 | /* wait until flash is ready */ | |
300 | do { | |
301 | /* check timeout */ | |
6d0f6bcf | 302 | if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) { |
ea8015b8 WD |
303 | *addr = CMD_STATUS_RESET; |
304 | result = BIT_TIMEOUT; | |
305 | break; | |
306 | } | |
307 | ||
308 | *addr = CMD_STATUS_READ; | |
309 | result = *addr; | |
310 | bsR7 = result & (1 << 7); | |
311 | bsR7_2 = result & (1 << 23); | |
312 | } while (!bsR7 | !bsR7_2); | |
313 | ||
314 | *addr = CMD_STATUS_READ; | |
315 | result1 = *addr; | |
316 | bsR5 = result1 & (1 << 5); | |
317 | bsR5_2 = result1 & (1 << 21); | |
318 | #ifdef SAMSUNG_FLASH_DEBUG | |
319 | printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2); | |
320 | if (bsR5 != 0 && bsR5_2 != 0) | |
321 | printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2); | |
322 | #endif | |
323 | ||
324 | *addr = CMD_READ_ARRAY; | |
325 | *addr = CMD_RESUME; | |
326 | ||
327 | if ((rc = flash_error (result)) != ERR_OK) | |
328 | goto outahere; | |
329 | #if 0 | |
330 | printf ("ok.\n"); | |
331 | } else { /* it was protected */ | |
332 | ||
333 | printf ("protected!\n"); | |
334 | #endif | |
335 | } | |
336 | } | |
337 | ||
338 | outahere: | |
339 | /* allow flash to settle - wait 10 ms */ | |
340 | udelay_masked (10000); | |
341 | ||
342 | if (iflag) | |
343 | enable_interrupts (); | |
344 | ||
345 | #ifdef USE_920T_MMU | |
346 | if (cflag) | |
347 | dcache_enable (); | |
348 | #endif | |
349 | return rc; | |
350 | } | |
351 | ||
352 | /*----------------------------------------------------------------------- | |
353 | * Copy memory to flash | |
354 | */ | |
355 | ||
8de7ed3a | 356 | static int write_word (flash_info_t * info, ulong dest, ulong data) |
ea8015b8 WD |
357 | { |
358 | vu_long *addr = (vu_long *) dest; | |
359 | ulong result; | |
360 | int rc = ERR_OK; | |
361 | int iflag; | |
362 | ||
363 | #ifdef USE_920T_MMU | |
364 | int cflag; | |
365 | #endif | |
366 | ||
367 | /* | |
368 | * Check if Flash is (sufficiently) erased | |
369 | */ | |
370 | result = *addr; | |
371 | if ((result & data) != data) | |
372 | return ERR_NOT_ERASED; | |
373 | ||
374 | /* | |
375 | * Disable interrupts which might cause a timeout | |
376 | * here. Remember that our exception vectors are | |
377 | * at address 0 in the flash, and we don't want a | |
378 | * (ticker) exception to happen while the flash | |
379 | * chip is in programming mode. | |
380 | */ | |
381 | #ifdef USE_920T_MMU | |
382 | cflag = dcache_status (); | |
383 | dcache_disable (); | |
384 | #endif | |
385 | iflag = disable_interrupts (); | |
386 | ||
387 | /* *addr = CMD_STATUS_RESET; */ | |
388 | *addr = CMD_PROGRAM; | |
389 | *addr = data; | |
390 | ||
391 | /* arm simple, non interrupt dependent timer */ | |
392 | reset_timer_masked (); | |
393 | ||
394 | /* wait until flash is ready */ | |
395 | do { | |
396 | /* check timeout */ | |
6d0f6bcf | 397 | if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) { |
ea8015b8 WD |
398 | *addr = CMD_SUSPEND; |
399 | result = BIT_TIMEOUT; | |
400 | break; | |
401 | } | |
402 | ||
403 | *addr = CMD_STATUS_READ; | |
404 | result = *addr; | |
405 | } while (~result & BIT_BUSY); | |
406 | ||
407 | /* *addr = CMD_READ_ARRAY; */ | |
408 | *addr = CMD_STATUS_READ; | |
409 | result = *addr; | |
410 | ||
411 | rc = flash_error (result); | |
412 | ||
413 | if (iflag) | |
414 | enable_interrupts (); | |
415 | ||
416 | #ifdef USE_920T_MMU | |
417 | if (cflag) | |
418 | dcache_enable (); | |
419 | #endif | |
420 | *addr = CMD_READ_ARRAY; | |
421 | *addr = CMD_RESUME; | |
422 | return rc; | |
423 | } | |
424 | ||
425 | /*----------------------------------------------------------------------- | |
426 | * Copy memory to flash. | |
427 | */ | |
428 | ||
429 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
430 | { | |
431 | ulong cp, wp, data; | |
432 | int l; | |
433 | int i, rc; | |
434 | ||
435 | wp = (addr & ~3); /* get lower word aligned address */ | |
436 | ||
437 | /* | |
438 | * handle unaligned start bytes | |
439 | */ | |
440 | if ((l = addr - wp) != 0) { | |
441 | data = 0; | |
442 | for (i = 0, cp = wp; i < l; ++i, ++cp) { | |
443 | data = (data >> 8) | (*(uchar *) cp << 24); | |
444 | } | |
445 | for (; i < 4 && cnt > 0; ++i) { | |
446 | data = (data >> 8) | (*src++ << 24); | |
447 | --cnt; | |
448 | ++cp; | |
449 | } | |
450 | for (; cnt == 0 && i < 4; ++i, ++cp) { | |
451 | data = (data >> 8) | (*(uchar *) cp << 24); | |
452 | } | |
453 | ||
454 | if ((rc = write_word (info, wp, data)) != 0) { | |
455 | return (rc); | |
456 | } | |
457 | wp += 4; | |
458 | } | |
459 | ||
460 | /* | |
461 | * handle word aligned part | |
462 | */ | |
463 | while (cnt >= 4) { | |
464 | data = *((vu_long *) src); | |
465 | if ((rc = write_word (info, wp, data)) != 0) { | |
466 | return (rc); | |
467 | } | |
468 | src += 4; | |
469 | wp += 4; | |
470 | cnt -= 4; | |
471 | } | |
472 | ||
473 | if (cnt == 0) { | |
474 | return ERR_OK; | |
475 | } | |
476 | ||
477 | /* | |
478 | * handle unaligned tail bytes | |
479 | */ | |
480 | data = 0; | |
481 | for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) { | |
482 | data = (data >> 8) | (*src++ << 24); | |
483 | --cnt; | |
484 | } | |
485 | for (; i < 4; ++i, ++cp) { | |
486 | data = (data >> 8) | (*(uchar *) cp << 24); | |
487 | } | |
488 | ||
489 | return write_word (info, wp, data); | |
490 | } |