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Commit | Line | Data |
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c609719b WD |
1 | /* |
2 | * Driver for Disk-On-Chip 2000 and Millennium | |
3 | * (c) 1999 Machine Vision Holdings, Inc. | |
4 | * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org> | |
5 | * | |
6 | * $Id: doc2000.c,v 1.46 2001/10/02 15:05:13 dwmw2 Exp $ | |
7 | */ | |
8 | ||
9 | #include <common.h> | |
10 | #include <config.h> | |
11 | #include <command.h> | |
12 | #include <malloc.h> | |
13 | #include <asm/io.h> | |
14 | ||
15 | #ifdef CONFIG_SHOW_BOOT_PROGRESS | |
16 | # include <status_led.h> | |
17 | # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) | |
18 | #else | |
19 | # define SHOW_BOOT_PROGRESS(arg) | |
20 | #endif | |
21 | ||
22 | #if (CONFIG_COMMANDS & CFG_CMD_DOC) | |
23 | ||
ac6dbb85 | 24 | #include <linux/mtd/nftl.h> |
c609719b WD |
25 | #include <linux/mtd/nand.h> |
26 | #include <linux/mtd/nand_ids.h> | |
27 | #include <linux/mtd/doc2000.h> | |
28 | #include <linux/mtd/nftl.h> | |
29 | ||
30 | #ifdef CFG_DOC_SUPPORT_2000 | |
31 | #define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) | |
32 | #else | |
33 | #define DoC_is_2000(doc) (0) | |
34 | #endif | |
35 | ||
36 | #ifdef CFG_DOC_SUPPORT_MILLENNIUM | |
37 | #define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) | |
38 | #else | |
39 | #define DoC_is_Millennium(doc) (0) | |
40 | #endif | |
41 | ||
42 | /* CFG_DOC_PASSIVE_PROBE: | |
43 | In order to ensure that the BIOS checksum is correct at boot time, and | |
44 | hence that the onboard BIOS extension gets executed, the DiskOnChip | |
45 | goes into reset mode when it is read sequentially: all registers | |
46 | return 0xff until the chip is woken up again by writing to the | |
47 | DOCControl register. | |
48 | ||
49 | Unfortunately, this means that the probe for the DiskOnChip is unsafe, | |
50 | because one of the first things it does is write to where it thinks | |
51 | the DOCControl register should be - which may well be shared memory | |
52 | for another device. I've had machines which lock up when this is | |
53 | attempted. Hence the possibility to do a passive probe, which will fail | |
54 | to detect a chip in reset mode, but is at least guaranteed not to lock | |
55 | the machine. | |
56 | ||
57 | If you have this problem, uncomment the following line: | |
58 | #define CFG_DOC_PASSIVE_PROBE | |
59 | */ | |
60 | ||
61 | #undef DOC_DEBUG | |
62 | #undef ECC_DEBUG | |
63 | #undef PSYCHO_DEBUG | |
64 | #undef NFTL_DEBUG | |
65 | ||
66 | static struct DiskOnChip doc_dev_desc[CFG_MAX_DOC_DEVICE]; | |
67 | ||
68 | /* Current DOC Device */ | |
69 | static int curr_device = -1; | |
70 | ||
71 | /* ------------------------------------------------------------------------- */ | |
72 | ||
73 | int do_doc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
74 | { | |
75 | int rcode = 0; | |
76 | ||
77 | switch (argc) { | |
78 | case 0: | |
79 | case 1: | |
80 | printf ("Usage:\n%s\n", cmdtp->usage); | |
81 | return 1; | |
82 | case 2: | |
8bde7f77 | 83 | if (strcmp(argv[1],"info") == 0) { |
c609719b WD |
84 | int i; |
85 | ||
86 | putc ('\n'); | |
87 | ||
88 | for (i=0; i<CFG_MAX_DOC_DEVICE; ++i) { | |
89 | if(doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) | |
90 | continue; /* list only known devices */ | |
91 | printf ("Device %d: ", i); | |
92 | doc_print(&doc_dev_desc[i]); | |
93 | } | |
94 | return 0; | |
95 | ||
96 | } else if (strcmp(argv[1],"device") == 0) { | |
97 | if ((curr_device < 0) || (curr_device >= CFG_MAX_DOC_DEVICE)) { | |
98 | puts ("\nno devices available\n"); | |
99 | return 1; | |
100 | } | |
101 | printf ("\nDevice %d: ", curr_device); | |
102 | doc_print(&doc_dev_desc[curr_device]); | |
103 | return 0; | |
104 | } | |
105 | printf ("Usage:\n%s\n", cmdtp->usage); | |
106 | return 1; | |
107 | case 3: | |
108 | if (strcmp(argv[1],"device") == 0) { | |
109 | int dev = (int)simple_strtoul(argv[2], NULL, 10); | |
110 | ||
111 | printf ("\nDevice %d: ", dev); | |
112 | if (dev >= CFG_MAX_DOC_DEVICE) { | |
113 | puts ("unknown device\n"); | |
114 | return 1; | |
115 | } | |
116 | doc_print(&doc_dev_desc[dev]); | |
117 | /*doc_print (dev);*/ | |
118 | ||
119 | if (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN) { | |
120 | return 1; | |
121 | } | |
122 | ||
123 | curr_device = dev; | |
124 | ||
125 | puts ("... is now current device\n"); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | printf ("Usage:\n%s\n", cmdtp->usage); | |
131 | return 1; | |
132 | default: | |
133 | /* at least 4 args */ | |
134 | ||
135 | if (strcmp(argv[1],"read") == 0 || strcmp(argv[1],"write") == 0) { | |
136 | ulong addr = simple_strtoul(argv[2], NULL, 16); | |
137 | ulong off = simple_strtoul(argv[3], NULL, 16); | |
138 | ulong size = simple_strtoul(argv[4], NULL, 16); | |
139 | int cmd = (strcmp(argv[1],"read") == 0); | |
140 | int ret, total; | |
141 | ||
142 | printf ("\nDOC %s: device %d offset %ld, size %ld ... ", | |
143 | cmd ? "read" : "write", curr_device, off, size); | |
144 | ||
145 | ret = doc_rw(doc_dev_desc + curr_device, cmd, off, size, | |
146 | &total, (u_char*)addr); | |
147 | ||
148 | printf ("%d bytes %s: %s\n", total, cmd ? "read" : "write", | |
149 | ret ? "ERROR" : "OK"); | |
150 | ||
151 | return ret; | |
152 | } else if (strcmp(argv[1],"erase") == 0) { | |
153 | ulong off = simple_strtoul(argv[2], NULL, 16); | |
154 | ulong size = simple_strtoul(argv[3], NULL, 16); | |
155 | int ret; | |
156 | ||
157 | printf ("\nDOC erase: device %d offset %ld, size %ld ... ", | |
158 | curr_device, off, size); | |
159 | ||
160 | ret = doc_erase (doc_dev_desc + curr_device, off, size); | |
161 | ||
162 | printf("%s\n", ret ? "ERROR" : "OK"); | |
163 | ||
164 | return ret; | |
165 | } else { | |
166 | printf ("Usage:\n%s\n", cmdtp->usage); | |
167 | rcode = 1; | |
168 | } | |
169 | ||
170 | return rcode; | |
171 | } | |
172 | } | |
0d498393 WD |
173 | U_BOOT_CMD( |
174 | doc, 5, 1, do_doc, | |
8bde7f77 WD |
175 | "doc - Disk-On-Chip sub-system\n", |
176 | "info - show available DOC devices\n" | |
177 | "doc device [dev] - show or set current device\n" | |
178 | "doc read addr off size\n" | |
179 | "doc write addr off size - read/write `size'" | |
180 | " bytes starting at offset `off'\n" | |
181 | " to/from memory address `addr'\n" | |
182 | "doc erase off size - erase `size' bytes of DOC from offset `off'\n" | |
183 | ); | |
c609719b WD |
184 | |
185 | int do_docboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
186 | { | |
187 | char *boot_device = NULL; | |
188 | char *ep; | |
189 | int dev; | |
190 | ulong cnt; | |
191 | ulong addr; | |
192 | ulong offset = 0; | |
193 | image_header_t *hdr; | |
194 | int rcode = 0; | |
195 | ||
196 | switch (argc) { | |
197 | case 1: | |
198 | addr = CFG_LOAD_ADDR; | |
199 | boot_device = getenv ("bootdevice"); | |
200 | break; | |
201 | case 2: | |
202 | addr = simple_strtoul(argv[1], NULL, 16); | |
203 | boot_device = getenv ("bootdevice"); | |
204 | break; | |
205 | case 3: | |
206 | addr = simple_strtoul(argv[1], NULL, 16); | |
207 | boot_device = argv[2]; | |
208 | break; | |
209 | case 4: | |
210 | addr = simple_strtoul(argv[1], NULL, 16); | |
211 | boot_device = argv[2]; | |
212 | offset = simple_strtoul(argv[3], NULL, 16); | |
213 | break; | |
214 | default: | |
215 | printf ("Usage:\n%s\n", cmdtp->usage); | |
216 | SHOW_BOOT_PROGRESS (-1); | |
217 | return 1; | |
218 | } | |
219 | ||
220 | if (!boot_device) { | |
221 | puts ("\n** No boot device **\n"); | |
222 | SHOW_BOOT_PROGRESS (-1); | |
223 | return 1; | |
224 | } | |
225 | ||
226 | dev = simple_strtoul(boot_device, &ep, 16); | |
227 | ||
228 | if ((dev >= CFG_MAX_DOC_DEVICE) || | |
229 | (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN)) { | |
230 | printf ("\n** Device %d not available\n", dev); | |
231 | SHOW_BOOT_PROGRESS (-1); | |
232 | return 1; | |
233 | } | |
234 | ||
235 | printf ("\nLoading from device %d: %s at 0x%lX (offset 0x%lX)\n", | |
236 | dev, doc_dev_desc[dev].name, doc_dev_desc[dev].physadr, | |
237 | offset); | |
238 | ||
239 | if (doc_rw (doc_dev_desc + dev, 1, offset, | |
240 | SECTORSIZE, NULL, (u_char *)addr)) { | |
241 | printf ("** Read error on %d\n", dev); | |
242 | SHOW_BOOT_PROGRESS (-1); | |
243 | return 1; | |
244 | } | |
245 | ||
246 | hdr = (image_header_t *)addr; | |
247 | ||
248 | if (hdr->ih_magic == IH_MAGIC) { | |
249 | ||
250 | print_image_hdr (hdr); | |
251 | ||
252 | cnt = (hdr->ih_size + sizeof(image_header_t)); | |
253 | cnt -= SECTORSIZE; | |
254 | } else { | |
255 | puts ("\n** Bad Magic Number **\n"); | |
256 | SHOW_BOOT_PROGRESS (-1); | |
257 | return 1; | |
258 | } | |
259 | ||
260 | if (doc_rw (doc_dev_desc + dev, 1, offset + SECTORSIZE, cnt, | |
261 | NULL, (u_char *)(addr+SECTORSIZE))) { | |
262 | printf ("** Read error on %d\n", dev); | |
263 | SHOW_BOOT_PROGRESS (-1); | |
264 | return 1; | |
265 | } | |
266 | ||
267 | /* Loading ok, update default load address */ | |
268 | ||
269 | load_addr = addr; | |
270 | ||
271 | /* Check if we should attempt an auto-start */ | |
272 | if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { | |
273 | char *local_args[2]; | |
274 | extern int do_bootm (cmd_tbl_t *, int, int, char *[]); | |
275 | ||
276 | local_args[0] = argv[0]; | |
277 | local_args[1] = NULL; | |
278 | ||
279 | printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); | |
280 | ||
281 | do_bootm (cmdtp, 0, 1, local_args); | |
282 | rcode = 1; | |
283 | } | |
284 | return rcode; | |
285 | } | |
286 | ||
0d498393 WD |
287 | U_BOOT_CMD( |
288 | docboot, 4, 1, do_docboot, | |
8bde7f77 WD |
289 | "docboot - boot from DOC device\n", |
290 | "loadAddr dev\n" | |
291 | ); | |
292 | ||
c609719b WD |
293 | int doc_rw (struct DiskOnChip* this, int cmd, |
294 | loff_t from, size_t len, | |
295 | size_t * retlen, u_char * buf) | |
296 | { | |
297 | int noecc, ret = 0, n, total = 0; | |
298 | char eccbuf[6]; | |
299 | ||
300 | while(len) { | |
301 | /* The ECC will not be calculated correctly if | |
302 | less than 512 is written or read */ | |
303 | noecc = (from != (from | 0x1ff) + 1) || (len < 0x200); | |
304 | ||
305 | if (cmd) | |
306 | ret = doc_read_ecc(this, from, len, | |
307 | &n, (u_char*)buf, | |
308 | noecc ? NULL : eccbuf); | |
309 | else | |
310 | ret = doc_write_ecc(this, from, len, | |
311 | &n, (u_char*)buf, | |
312 | noecc ? NULL : eccbuf); | |
313 | ||
314 | if (ret) | |
315 | break; | |
316 | ||
317 | from += n; | |
318 | buf += n; | |
319 | total += n; | |
320 | len -= n; | |
321 | } | |
322 | ||
323 | if (retlen) | |
324 | *retlen = total; | |
325 | ||
326 | return ret; | |
327 | } | |
328 | ||
329 | void doc_print(struct DiskOnChip *this) { | |
330 | printf("%s at 0x%lX,\n" | |
331 | "\t %d chip%s %s, size %d MB, \n" | |
332 | "\t total size %ld MB, sector size %ld kB\n", | |
333 | this->name, this->physadr, this->numchips, | |
334 | this->numchips>1 ? "s" : "", this->chips_name, | |
335 | 1 << (this->chipshift - 20), | |
336 | this->totlen >> 20, this->erasesize >> 10); | |
337 | ||
338 | if (this->nftl_found) { | |
339 | struct NFTLrecord *nftl = &this->nftl; | |
340 | unsigned long bin_size, flash_size; | |
341 | ||
342 | bin_size = nftl->nb_boot_blocks * this->erasesize; | |
343 | flash_size = (nftl->nb_blocks - nftl->nb_boot_blocks) * this->erasesize; | |
344 | ||
345 | printf("\t NFTL boot record:\n" | |
346 | "\t Binary partition: size %ld%s\n" | |
347 | "\t Flash disk partition: size %ld%s, offset 0x%lx\n", | |
348 | bin_size > (1 << 20) ? bin_size >> 20 : bin_size >> 10, | |
349 | bin_size > (1 << 20) ? "MB" : "kB", | |
350 | flash_size > (1 << 20) ? flash_size >> 20 : flash_size >> 10, | |
351 | flash_size > (1 << 20) ? "MB" : "kB", bin_size); | |
352 | } else { | |
353 | puts ("\t No NFTL boot record found.\n"); | |
354 | } | |
355 | } | |
356 | ||
357 | /* ------------------------------------------------------------------------- */ | |
358 | ||
359 | /* This function is needed to avoid calls of the __ashrdi3 function. */ | |
360 | static int shr(int val, int shift) { | |
361 | return val >> shift; | |
362 | } | |
363 | ||
364 | /* Perform the required delay cycles by reading from the appropriate register */ | |
365 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) | |
366 | { | |
367 | volatile char dummy; | |
368 | int i; | |
369 | ||
370 | for (i = 0; i < cycles; i++) { | |
371 | if (DoC_is_Millennium(doc)) | |
372 | dummy = ReadDOC(doc->virtadr, NOP); | |
373 | else | |
374 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
375 | } | |
376 | ||
377 | } | |
378 | ||
379 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
380 | static int _DoC_WaitReady(struct DiskOnChip *doc) | |
381 | { | |
382 | unsigned long docptr = doc->virtadr; | |
383 | unsigned long start = get_timer(0); | |
384 | ||
385 | #ifdef PSYCHO_DEBUG | |
386 | puts ("_DoC_WaitReady called for out-of-line wait\n"); | |
387 | #endif | |
388 | ||
389 | /* Out-of-line routine to wait for chip response */ | |
390 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
391 | #ifdef CFG_DOC_SHORT_TIMEOUT | |
392 | /* it seems that after a certain time the DoC deasserts | |
393 | * the CDSN_CTRL_FR_B although it is not ready... | |
394 | * using a short timout solve this (timer increments every ms) */ | |
395 | if (get_timer(start) > 10) { | |
396 | return DOC_ETIMEOUT; | |
397 | } | |
398 | #else | |
399 | if (get_timer(start) > 10 * 1000) { | |
400 | puts ("_DoC_WaitReady timed out.\n"); | |
401 | return DOC_ETIMEOUT; | |
402 | } | |
403 | #endif | |
404 | udelay(1); | |
8bde7f77 | 405 | } |
c609719b WD |
406 | |
407 | return 0; | |
408 | } | |
409 | ||
410 | static int DoC_WaitReady(struct DiskOnChip *doc) | |
411 | { | |
412 | unsigned long docptr = doc->virtadr; | |
413 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
414 | int ret = 0; | |
415 | ||
416 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl | |
417 | see Software Requirement 11.4 item 2. */ | |
418 | DoC_Delay(doc, 4); | |
419 | ||
420 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
421 | /* Call the out-of-line routine to wait */ | |
422 | ret = _DoC_WaitReady(doc); | |
423 | ||
424 | /* issue 2 read from NOP register after reading from CDSNControl register | |
425 | see Software Requirement 11.4 item 2. */ | |
426 | DoC_Delay(doc, 2); | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
431 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to | |
432 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
433 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
434 | ||
435 | static inline int DoC_Command(struct DiskOnChip *doc, unsigned char command, | |
436 | unsigned char xtraflags) | |
437 | { | |
438 | unsigned long docptr = doc->virtadr; | |
439 | ||
440 | if (DoC_is_2000(doc)) | |
441 | xtraflags |= CDSN_CTRL_FLASH_IO; | |
442 | ||
443 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ | |
444 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); | |
445 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
446 | ||
447 | if (DoC_is_Millennium(doc)) | |
448 | WriteDOC(command, docptr, CDSNSlowIO); | |
449 | ||
450 | /* Send the command */ | |
451 | WriteDOC_(command, docptr, doc->ioreg); | |
452 | ||
453 | /* Lower the CLE line */ | |
454 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); | |
455 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
456 | ||
457 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ | |
458 | return DoC_WaitReady(doc); | |
459 | } | |
460 | ||
461 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to | |
462 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
463 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
464 | ||
465 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, | |
466 | unsigned char xtraflags1, unsigned char xtraflags2) | |
467 | { | |
468 | unsigned long docptr; | |
469 | int i; | |
470 | ||
471 | docptr = doc->virtadr; | |
472 | ||
473 | if (DoC_is_2000(doc)) | |
474 | xtraflags1 |= CDSN_CTRL_FLASH_IO; | |
475 | ||
476 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ | |
477 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); | |
478 | ||
479 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
480 | ||
481 | /* Send the address */ | |
482 | /* Devices with 256-byte page are addressed as: | |
483 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) | |
484 | * there is no device on the market with page256 | |
485 | and more than 24 bits. | |
486 | Devices with 512-byte page are addressed as: | |
487 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) | |
488 | * 25-31 is sent only if the chip support it. | |
489 | * bit 8 changes the read command to be sent | |
490 | (NAND_CMD_READ0 or NAND_CMD_READ1). | |
491 | */ | |
492 | ||
493 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { | |
494 | if (DoC_is_Millennium(doc)) | |
495 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
496 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
497 | } | |
498 | ||
499 | if (doc->page256) { | |
500 | ofs = ofs >> 8; | |
501 | } else { | |
502 | ofs = ofs >> 9; | |
503 | } | |
504 | ||
505 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { | |
506 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { | |
507 | if (DoC_is_Millennium(doc)) | |
508 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
509 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
510 | } | |
511 | } | |
512 | ||
513 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ | |
514 | ||
515 | /* FIXME: The SlowIO's for millennium could be replaced by | |
516 | a single WritePipeTerm here. mf. */ | |
517 | ||
518 | /* Lower the ALE line */ | |
519 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, | |
520 | CDSNControl); | |
521 | ||
522 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
523 | ||
524 | /* Wait for the chip to respond - Software requirement 11.4.1 */ | |
525 | return DoC_WaitReady(doc); | |
526 | } | |
527 | ||
528 | /* Read a buffer from DoC, taking care of Millennium odditys */ | |
529 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) | |
530 | { | |
531 | volatile int dummy; | |
532 | int modulus = 0xffff; | |
533 | unsigned long docptr; | |
534 | int i; | |
535 | ||
536 | docptr = doc->virtadr; | |
537 | ||
538 | if (len <= 0) | |
539 | return; | |
540 | ||
541 | if (DoC_is_Millennium(doc)) { | |
542 | /* Read the data via the internal pipeline through CDSN IO register, | |
543 | see Pipelined Read Operations 11.3 */ | |
544 | dummy = ReadDOC(docptr, ReadPipeInit); | |
545 | ||
546 | /* Millennium should use the LastDataRead register - Pipeline Reads */ | |
547 | len--; | |
548 | ||
549 | /* This is needed for correctly ECC calculation */ | |
550 | modulus = 0xff; | |
551 | } | |
552 | ||
553 | for (i = 0; i < len; i++) | |
554 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); | |
555 | ||
556 | if (DoC_is_Millennium(doc)) { | |
557 | buf[i] = ReadDOC(docptr, LastDataRead); | |
558 | } | |
559 | } | |
560 | ||
561 | /* Write a buffer to DoC, taking care of Millennium odditys */ | |
562 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) | |
563 | { | |
564 | unsigned long docptr; | |
565 | int i; | |
566 | ||
567 | docptr = doc->virtadr; | |
568 | ||
569 | if (len <= 0) | |
570 | return; | |
571 | ||
572 | for (i = 0; i < len; i++) | |
573 | WriteDOC_(buf[i], docptr, doc->ioreg + i); | |
574 | ||
575 | if (DoC_is_Millennium(doc)) { | |
576 | WriteDOC(0x00, docptr, WritePipeTerm); | |
577 | } | |
578 | } | |
579 | ||
580 | ||
581 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
582 | ||
583 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) | |
584 | { | |
585 | unsigned long docptr = doc->virtadr; | |
586 | ||
587 | /* Software requirement 11.4.4 before writing DeviceSelect */ | |
588 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ | |
589 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); | |
590 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
591 | ||
592 | /* Select the individual flash chip requested */ | |
593 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
594 | DoC_Delay(doc, 4); | |
595 | ||
596 | /* Reassert the CE line */ | |
597 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, | |
598 | CDSNControl); | |
599 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
600 | ||
601 | /* Wait for it to be ready */ | |
602 | return DoC_WaitReady(doc); | |
603 | } | |
604 | ||
605 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
606 | ||
607 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) | |
608 | { | |
609 | unsigned long docptr = doc->virtadr; | |
610 | ||
611 | /* Select the floor (bank) of chips required */ | |
612 | WriteDOC(floor, docptr, FloorSelect); | |
613 | ||
614 | /* Wait for the chip to be ready */ | |
615 | return DoC_WaitReady(doc); | |
616 | } | |
617 | ||
618 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
619 | ||
620 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
621 | { | |
622 | int mfr, id, i; | |
623 | volatile char dummy; | |
624 | ||
625 | /* Page in the required floor/chip */ | |
626 | DoC_SelectFloor(doc, floor); | |
627 | DoC_SelectChip(doc, chip); | |
628 | ||
629 | /* Reset the chip */ | |
630 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { | |
631 | #ifdef DOC_DEBUG | |
632 | printf("DoC_Command (reset) for %d,%d returned true\n", | |
633 | floor, chip); | |
634 | #endif | |
635 | return 0; | |
636 | } | |
637 | ||
638 | ||
639 | /* Read the NAND chip ID: 1. Send ReadID command */ | |
640 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { | |
641 | #ifdef DOC_DEBUG | |
642 | printf("DoC_Command (ReadID) for %d,%d returned true\n", | |
643 | floor, chip); | |
644 | #endif | |
645 | return 0; | |
646 | } | |
647 | ||
648 | /* Read the NAND chip ID: 2. Send address byte zero */ | |
649 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); | |
650 | ||
651 | /* Read the manufacturer and device id codes from the device */ | |
652 | ||
653 | /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ | |
654 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
655 | DoC_Delay(doc, 2); | |
656 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); | |
657 | ||
658 | /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ | |
659 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
660 | DoC_Delay(doc, 2); | |
661 | id = ReadDOC_(doc->virtadr, doc->ioreg); | |
662 | ||
663 | /* No response - return failure */ | |
664 | if (mfr == 0xff || mfr == 0) | |
665 | return 0; | |
666 | ||
667 | /* Check it's the same as the first chip we identified. | |
668 | * M-Systems say that any given DiskOnChip device should only | |
669 | * contain _one_ type of flash part, although that's not a | |
670 | * hardware restriction. */ | |
671 | if (doc->mfr) { | |
672 | if (doc->mfr == mfr && doc->id == id) | |
673 | return 1; /* This is another the same the first */ | |
674 | else | |
675 | printf("Flash chip at floor %d, chip %d is different:\n", | |
676 | floor, chip); | |
677 | } | |
678 | ||
679 | /* Print and store the manufacturer and ID codes. */ | |
680 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
681 | if (mfr == nand_flash_ids[i].manufacture_id && | |
682 | id == nand_flash_ids[i].model_id) { | |
683 | #ifdef DOC_DEBUG | |
684 | printf("Flash chip found: Manufacturer ID: %2.2X, " | |
685 | "Chip ID: %2.2X (%s)\n", mfr, id, | |
686 | nand_flash_ids[i].name); | |
687 | #endif | |
688 | if (!doc->mfr) { | |
689 | doc->mfr = mfr; | |
690 | doc->id = id; | |
691 | doc->chipshift = | |
692 | nand_flash_ids[i].chipshift; | |
693 | doc->page256 = nand_flash_ids[i].page256; | |
694 | doc->pageadrlen = | |
695 | nand_flash_ids[i].pageadrlen; | |
696 | doc->erasesize = | |
697 | nand_flash_ids[i].erasesize; | |
698 | doc->chips_name = | |
699 | nand_flash_ids[i].name; | |
700 | return 1; | |
701 | } | |
702 | return 0; | |
703 | } | |
704 | } | |
705 | ||
706 | ||
707 | #ifdef DOC_DEBUG | |
708 | /* We haven't fully identified the chip. Print as much as we know. */ | |
709 | printf("Unknown flash chip found: %2.2X %2.2X\n", | |
710 | id, mfr); | |
711 | #endif | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
717 | ||
718 | static void DoC_ScanChips(struct DiskOnChip *this) | |
719 | { | |
720 | int floor, chip; | |
721 | int numchips[MAX_FLOORS]; | |
722 | int maxchips = MAX_CHIPS; | |
723 | int ret = 1; | |
724 | ||
725 | this->numchips = 0; | |
726 | this->mfr = 0; | |
727 | this->id = 0; | |
728 | ||
729 | if (DoC_is_Millennium(this)) | |
730 | maxchips = MAX_CHIPS_MIL; | |
731 | ||
732 | /* For each floor, find the number of valid chips it contains */ | |
733 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
734 | ret = 1; | |
735 | numchips[floor] = 0; | |
736 | for (chip = 0; chip < maxchips && ret != 0; chip++) { | |
737 | ||
738 | ret = DoC_IdentChip(this, floor, chip); | |
739 | if (ret) { | |
740 | numchips[floor]++; | |
741 | this->numchips++; | |
742 | } | |
743 | } | |
744 | } | |
745 | ||
746 | /* If there are none at all that we recognise, bail */ | |
747 | if (!this->numchips) { | |
748 | puts ("No flash chips recognised.\n"); | |
749 | return; | |
750 | } | |
751 | ||
752 | /* Allocate an array to hold the information for each chip */ | |
753 | this->chips = malloc(sizeof(struct Nand) * this->numchips); | |
754 | if (!this->chips) { | |
755 | puts ("No memory for allocating chip info structures\n"); | |
756 | return; | |
757 | } | |
758 | ||
759 | ret = 0; | |
760 | ||
761 | /* Fill out the chip array with {floor, chipno} for each | |
762 | * detected chip in the device. */ | |
763 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
764 | for (chip = 0; chip < numchips[floor]; chip++) { | |
765 | this->chips[ret].floor = floor; | |
766 | this->chips[ret].chip = chip; | |
767 | this->chips[ret].curadr = 0; | |
768 | this->chips[ret].curmode = 0x50; | |
769 | ret++; | |
770 | } | |
771 | } | |
772 | ||
773 | /* Calculate and print the total size of the device */ | |
774 | this->totlen = this->numchips * (1 << this->chipshift); | |
775 | ||
776 | #ifdef DOC_DEBUG | |
777 | printf("%d flash chips found. Total DiskOnChip size: %ld MB\n", | |
778 | this->numchips, this->totlen >> 20); | |
779 | #endif | |
780 | } | |
781 | ||
782 | /* find_boot_record: Find the NFTL Media Header and its Spare copy which contains the | |
783 | * various device information of the NFTL partition and Bad Unit Table. Update | |
784 | * the ReplUnitTable[] table accroding to the Bad Unit Table. ReplUnitTable[] | |
785 | * is used for management of Erase Unit in other routines in nftl.c and nftlmount.c | |
786 | */ | |
787 | static int find_boot_record(struct NFTLrecord *nftl) | |
788 | { | |
789 | struct nftl_uci1 h1; | |
790 | struct nftl_oob oob; | |
791 | unsigned int block, boot_record_count = 0; | |
792 | int retlen; | |
793 | u8 buf[SECTORSIZE]; | |
794 | struct NFTLMediaHeader *mh = &nftl->MediaHdr; | |
795 | unsigned int i; | |
796 | ||
797 | nftl->MediaUnit = BLOCK_NIL; | |
798 | nftl->SpareMediaUnit = BLOCK_NIL; | |
799 | ||
800 | /* search for a valid boot record */ | |
801 | for (block = 0; block < nftl->nb_blocks; block++) { | |
802 | int ret; | |
803 | ||
804 | /* Check for ANAND header first. Then can whinge if it's found but later | |
805 | checks fail */ | |
806 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize, SECTORSIZE, | |
807 | &retlen, buf, NULL))) { | |
808 | static int warncount = 5; | |
809 | ||
810 | if (warncount) { | |
811 | printf("Block read at 0x%x failed\n", block * nftl->EraseSize); | |
812 | if (!--warncount) | |
813 | puts ("Further failures for this block will not be printed\n"); | |
814 | } | |
815 | continue; | |
816 | } | |
817 | ||
818 | if (retlen < 6 || memcmp(buf, "ANAND", 6)) { | |
819 | /* ANAND\0 not found. Continue */ | |
820 | #ifdef PSYCHO_DEBUG | |
821 | printf("ANAND header not found at 0x%x\n", block * nftl->EraseSize); | |
822 | #endif | |
823 | continue; | |
824 | } | |
825 | ||
826 | #ifdef NFTL_DEBUG | |
827 | printf("ANAND header found at 0x%x\n", block * nftl->EraseSize); | |
828 | #endif | |
829 | ||
830 | /* To be safer with BIOS, also use erase mark as discriminant */ | |
831 | if ((ret = doc_read_oob(nftl->mtd, block * nftl->EraseSize + SECTORSIZE + 8, | |
832 | 8, &retlen, (char *)&h1) < 0)) { | |
833 | #ifdef NFTL_DEBUG | |
834 | printf("ANAND header found at 0x%x, but OOB data read failed\n", | |
835 | block * nftl->EraseSize); | |
836 | #endif | |
837 | continue; | |
838 | } | |
839 | ||
840 | /* OK, we like it. */ | |
841 | ||
842 | if (boot_record_count) { | |
843 | /* We've already processed one. So we just check if | |
844 | this one is the same as the first one we found */ | |
845 | if (memcmp(mh, buf, sizeof(struct NFTLMediaHeader))) { | |
846 | #ifdef NFTL_DEBUG | |
847 | printf("NFTL Media Headers at 0x%x and 0x%x disagree.\n", | |
848 | nftl->MediaUnit * nftl->EraseSize, block * nftl->EraseSize); | |
849 | #endif | |
850 | /* if (debug) Print both side by side */ | |
851 | return -1; | |
852 | } | |
853 | if (boot_record_count == 1) | |
854 | nftl->SpareMediaUnit = block; | |
855 | ||
856 | boot_record_count++; | |
857 | continue; | |
858 | } | |
859 | ||
860 | /* This is the first we've seen. Copy the media header structure into place */ | |
861 | memcpy(mh, buf, sizeof(struct NFTLMediaHeader)); | |
862 | ||
863 | /* Do some sanity checks on it */ | |
864 | if (mh->UnitSizeFactor != 0xff) { | |
865 | puts ("Sorry, we don't support UnitSizeFactor " | |
866 | "of != 1 yet.\n"); | |
867 | return -1; | |
868 | } | |
869 | ||
870 | nftl->nb_boot_blocks = le16_to_cpu(mh->FirstPhysicalEUN); | |
871 | if ((nftl->nb_boot_blocks + 2) >= nftl->nb_blocks) { | |
872 | printf ("NFTL Media Header sanity check failed:\n" | |
873 | "nb_boot_blocks (%d) + 2 > nb_blocks (%d)\n", | |
874 | nftl->nb_boot_blocks, nftl->nb_blocks); | |
875 | return -1; | |
876 | } | |
877 | ||
878 | nftl->numvunits = le32_to_cpu(mh->FormattedSize) / nftl->EraseSize; | |
879 | if (nftl->numvunits > (nftl->nb_blocks - nftl->nb_boot_blocks - 2)) { | |
880 | printf ("NFTL Media Header sanity check failed:\n" | |
881 | "numvunits (%d) > nb_blocks (%d) - nb_boot_blocks(%d) - 2\n", | |
882 | nftl->numvunits, | |
883 | nftl->nb_blocks, | |
884 | nftl->nb_boot_blocks); | |
885 | return -1; | |
886 | } | |
887 | ||
888 | nftl->nr_sects = nftl->numvunits * (nftl->EraseSize / SECTORSIZE); | |
889 | ||
890 | /* If we're not using the last sectors in the device for some reason, | |
891 | reduce nb_blocks accordingly so we forget they're there */ | |
892 | nftl->nb_blocks = le16_to_cpu(mh->NumEraseUnits) + le16_to_cpu(mh->FirstPhysicalEUN); | |
893 | ||
894 | /* read the Bad Erase Unit Table and modify ReplUnitTable[] accordingly */ | |
895 | for (i = 0; i < nftl->nb_blocks; i++) { | |
896 | if ((i & (SECTORSIZE - 1)) == 0) { | |
897 | /* read one sector for every SECTORSIZE of blocks */ | |
898 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize + | |
899 | i + SECTORSIZE, SECTORSIZE, | |
900 | &retlen, buf, (char *)&oob)) < 0) { | |
901 | puts ("Read of bad sector table failed\n"); | |
902 | return -1; | |
903 | } | |
904 | } | |
905 | /* mark the Bad Erase Unit as RESERVED in ReplUnitTable */ | |
906 | if (buf[i & (SECTORSIZE - 1)] != 0xff) | |
907 | nftl->ReplUnitTable[i] = BLOCK_RESERVED; | |
908 | } | |
909 | ||
910 | nftl->MediaUnit = block; | |
911 | boot_record_count++; | |
912 | ||
913 | } /* foreach (block) */ | |
914 | ||
915 | return boot_record_count?0:-1; | |
916 | } | |
917 | ||
918 | /* This routine is made available to other mtd code via | |
919 | * inter_module_register. It must only be accessed through | |
920 | * inter_module_get which will bump the use count of this module. The | |
921 | * addresses passed back in mtd are valid as long as the use count of | |
922 | * this module is non-zero, i.e. between inter_module_get and | |
923 | * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. | |
924 | */ | |
925 | static void DoC2k_init(struct DiskOnChip* this) | |
926 | { | |
927 | struct NFTLrecord *nftl; | |
928 | ||
929 | switch (this->ChipID) { | |
930 | case DOC_ChipID_Doc2k: | |
931 | this->name = "DiskOnChip 2000"; | |
932 | this->ioreg = DoC_2k_CDSN_IO; | |
933 | break; | |
934 | case DOC_ChipID_DocMil: | |
935 | this->name = "DiskOnChip Millennium"; | |
936 | this->ioreg = DoC_Mil_CDSN_IO; | |
937 | break; | |
938 | } | |
939 | ||
940 | #ifdef DOC_DEBUG | |
941 | printf("%s found at address 0x%lX\n", this->name, | |
942 | this->physadr); | |
943 | #endif | |
944 | ||
945 | this->totlen = 0; | |
946 | this->numchips = 0; | |
947 | ||
948 | this->curfloor = -1; | |
949 | this->curchip = -1; | |
950 | ||
951 | /* Ident all the chips present. */ | |
952 | DoC_ScanChips(this); | |
953 | ||
954 | nftl = &this->nftl; | |
955 | ||
956 | /* Get physical parameters */ | |
957 | nftl->EraseSize = this->erasesize; | |
8bde7f77 | 958 | nftl->nb_blocks = this->totlen / this->erasesize; |
c609719b WD |
959 | nftl->mtd = this; |
960 | ||
961 | if (find_boot_record(nftl) != 0) | |
962 | this->nftl_found = 0; | |
963 | else | |
964 | this->nftl_found = 1; | |
965 | ||
966 | printf("%s @ 0x%lX, %ld MB\n", this->name, this->physadr, this->totlen >> 20); | |
967 | } | |
968 | ||
969 | int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len, | |
970 | size_t * retlen, u_char * buf, u_char * eccbuf) | |
971 | { | |
972 | unsigned long docptr; | |
973 | struct Nand *mychip; | |
974 | unsigned char syndrome[6]; | |
975 | volatile char dummy; | |
976 | int i, len256 = 0, ret=0; | |
977 | ||
978 | docptr = this->virtadr; | |
979 | ||
980 | /* Don't allow read past end of device */ | |
981 | if (from >= this->totlen) { | |
982 | puts ("Out of flash\n"); | |
983 | return DOC_EINVAL; | |
984 | } | |
985 | ||
986 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
987 | if (from + len > ((from | 0x1ff) + 1)) | |
988 | len = ((from | 0x1ff) + 1) - from; | |
989 | ||
990 | /* The ECC will not be calculated correctly if less than 512 is read */ | |
991 | if (len != 0x200 && eccbuf) | |
992 | printf("ECC needs a full sector read (adr: %lx size %lx)\n", | |
993 | (long) from, (long) len); | |
994 | ||
995 | #ifdef PHYCH_DEBUG | |
996 | printf("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); | |
997 | #endif | |
998 | ||
999 | /* Find the chip which is to be used and select it */ | |
1000 | mychip = &this->chips[shr(from, this->chipshift)]; | |
1001 | ||
1002 | if (this->curfloor != mychip->floor) { | |
1003 | DoC_SelectFloor(this, mychip->floor); | |
1004 | DoC_SelectChip(this, mychip->chip); | |
1005 | } else if (this->curchip != mychip->chip) { | |
1006 | DoC_SelectChip(this, mychip->chip); | |
1007 | } | |
1008 | ||
1009 | this->curfloor = mychip->floor; | |
1010 | this->curchip = mychip->chip; | |
1011 | ||
1012 | DoC_Command(this, | |
1013 | (!this->page256 | |
1014 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1015 | CDSN_CTRL_WP); | |
1016 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, | |
1017 | CDSN_CTRL_ECC_IO); | |
1018 | ||
1019 | if (eccbuf) { | |
1020 | /* Prime the ECC engine */ | |
1021 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1022 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
1023 | } else { | |
1024 | /* disable the ECC engine */ | |
1025 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1026 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1027 | } | |
1028 | ||
1029 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1030 | if (this->page256 && from + len > (from | 0xff) + 1) { | |
1031 | len256 = (from | 0xff) + 1 - from; | |
1032 | DoC_ReadBuf(this, buf, len256); | |
1033 | ||
1034 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); | |
1035 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, | |
1036 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); | |
1037 | } | |
1038 | ||
1039 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1040 | ||
1041 | /* Let the caller know we completed it */ | |
1042 | *retlen = len; | |
1043 | ||
1044 | if (eccbuf) { | |
1045 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1046 | /* Note: this will work even with 2M x 8bit devices as */ | |
1047 | /* they have 8 bytes of OOB per 256 page. mf. */ | |
1048 | DoC_ReadBuf(this, eccbuf, 6); | |
1049 | ||
1050 | /* Flush the pipeline */ | |
1051 | if (DoC_is_Millennium(this)) { | |
1052 | dummy = ReadDOC(docptr, ECCConf); | |
1053 | dummy = ReadDOC(docptr, ECCConf); | |
1054 | i = ReadDOC(docptr, ECCConf); | |
1055 | } else { | |
1056 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1057 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1058 | i = ReadDOC(docptr, 2k_ECCStatus); | |
1059 | } | |
1060 | ||
1061 | /* Check the ECC Status */ | |
1062 | if (i & 0x80) { | |
1063 | int nb_errors; | |
1064 | /* There was an ECC error */ | |
1065 | #ifdef ECC_DEBUG | |
1066 | printf("DiskOnChip ECC Error: Read at %lx\n", (long)from); | |
1067 | #endif | |
1068 | /* Read the ECC syndrom through the DiskOnChip ECC logic. | |
1069 | These syndrome will be all ZERO when there is no error */ | |
1070 | for (i = 0; i < 6; i++) { | |
1071 | syndrome[i] = | |
1072 | ReadDOC(docptr, ECCSyndrome0 + i); | |
1073 | } | |
8bde7f77 | 1074 | nb_errors = doc_decode_ecc(buf, syndrome); |
c609719b WD |
1075 | |
1076 | #ifdef ECC_DEBUG | |
1077 | printf("Errors corrected: %x\n", nb_errors); | |
1078 | #endif | |
8bde7f77 | 1079 | if (nb_errors < 0) { |
c609719b WD |
1080 | /* We return error, but have actually done the read. Not that |
1081 | this can be told to user-space, via sys_read(), but at least | |
1082 | MTD-aware stuff can know about it by checking *retlen */ | |
1083 | printf("ECC Errors at %lx\n", (long)from); | |
1084 | ret = DOC_EECC; | |
8bde7f77 | 1085 | } |
c609719b WD |
1086 | } |
1087 | ||
1088 | #ifdef PSYCHO_DEBUG | |
1089 | printf("ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1090 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], | |
1091 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
1092 | #endif | |
1093 | ||
1094 | /* disable the ECC engine */ | |
1095 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); | |
1096 | } | |
1097 | ||
1098 | /* according to 11.4.1, we need to wait for the busy line | |
8bde7f77 | 1099 | * drop if we read to the end of the page. */ |
c609719b WD |
1100 | if(0 == ((from + *retlen) & 0x1ff)) |
1101 | { | |
1102 | DoC_WaitReady(this); | |
1103 | } | |
1104 | ||
1105 | return ret; | |
1106 | } | |
1107 | ||
1108 | int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len, | |
1109 | size_t * retlen, const u_char * buf, | |
1110 | u_char * eccbuf) | |
1111 | { | |
1112 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ | |
1113 | unsigned long docptr; | |
1114 | volatile char dummy; | |
1115 | int len256 = 0; | |
1116 | struct Nand *mychip; | |
1117 | ||
1118 | docptr = this->virtadr; | |
1119 | ||
1120 | /* Don't allow write past end of device */ | |
1121 | if (to >= this->totlen) { | |
1122 | puts ("Out of flash\n"); | |
1123 | return DOC_EINVAL; | |
1124 | } | |
1125 | ||
1126 | /* Don't allow a single write to cross a 512-byte block boundary */ | |
1127 | if (to + len > ((to | 0x1ff) + 1)) | |
1128 | len = ((to | 0x1ff) + 1) - to; | |
1129 | ||
1130 | /* The ECC will not be calculated correctly if less than 512 is written */ | |
1131 | if (len != 0x200 && eccbuf) | |
1132 | printf("ECC needs a full sector write (adr: %lx size %lx)\n", | |
1133 | (long) to, (long) len); | |
1134 | ||
1135 | /* printf("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ | |
1136 | ||
1137 | /* Find the chip which is to be used and select it */ | |
1138 | mychip = &this->chips[shr(to, this->chipshift)]; | |
1139 | ||
1140 | if (this->curfloor != mychip->floor) { | |
1141 | DoC_SelectFloor(this, mychip->floor); | |
1142 | DoC_SelectChip(this, mychip->chip); | |
1143 | } else if (this->curchip != mychip->chip) { | |
1144 | DoC_SelectChip(this, mychip->chip); | |
1145 | } | |
1146 | ||
1147 | this->curfloor = mychip->floor; | |
1148 | this->curchip = mychip->chip; | |
1149 | ||
1150 | /* Set device to main plane of flash */ | |
1151 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1152 | DoC_Command(this, | |
1153 | (!this->page256 | |
1154 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1155 | CDSN_CTRL_WP); | |
1156 | ||
1157 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1158 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); | |
1159 | ||
1160 | if (eccbuf) { | |
1161 | /* Prime the ECC engine */ | |
1162 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1163 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
1164 | } else { | |
1165 | /* disable the ECC engine */ | |
1166 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1167 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1168 | } | |
1169 | ||
1170 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1171 | if (this->page256 && to + len > (to | 0xff) + 1) { | |
1172 | len256 = (to | 0xff) + 1 - to; | |
1173 | DoC_WriteBuf(this, buf, len256); | |
1174 | ||
1175 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1176 | ||
1177 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1178 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1179 | ||
1180 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1181 | DoC_Delay(this, 2); | |
1182 | ||
1183 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1184 | puts ("Error programming flash\n"); | |
1185 | /* Error in programming */ | |
1186 | *retlen = 0; | |
1187 | return DOC_EIO; | |
1188 | } | |
1189 | ||
1190 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1191 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, | |
1192 | CDSN_CTRL_ECC_IO); | |
1193 | } | |
1194 | ||
1195 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1196 | ||
1197 | if (eccbuf) { | |
1198 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, | |
1199 | CDSNControl); | |
1200 | ||
1201 | if (DoC_is_Millennium(this)) { | |
1202 | WriteDOC(0, docptr, NOP); | |
1203 | WriteDOC(0, docptr, NOP); | |
1204 | WriteDOC(0, docptr, NOP); | |
1205 | } else { | |
1206 | WriteDOC_(0, docptr, this->ioreg); | |
1207 | WriteDOC_(0, docptr, this->ioreg); | |
1208 | WriteDOC_(0, docptr, this->ioreg); | |
1209 | } | |
1210 | ||
1211 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1212 | for (di = 0; di < 6; di++) { | |
1213 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); | |
1214 | } | |
1215 | ||
1216 | /* Reset the ECC engine */ | |
1217 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1218 | ||
1219 | #ifdef PSYCHO_DEBUG | |
1220 | printf | |
1221 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1222 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
1223 | eccbuf[4], eccbuf[5]); | |
1224 | #endif | |
1225 | } | |
1226 | ||
1227 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1228 | ||
1229 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1230 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1231 | ||
1232 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1233 | DoC_Delay(this, 2); | |
1234 | ||
1235 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1236 | puts ("Error programming flash\n"); | |
1237 | /* Error in programming */ | |
1238 | *retlen = 0; | |
1239 | return DOC_EIO; | |
1240 | } | |
1241 | ||
1242 | /* Let the caller know we completed it */ | |
1243 | *retlen = len; | |
1244 | ||
1245 | if (eccbuf) { | |
1246 | unsigned char x[8]; | |
1247 | size_t dummy; | |
1248 | int ret; | |
1249 | ||
1250 | /* Write the ECC data to flash */ | |
1251 | for (di=0; di<6; di++) | |
1252 | x[di] = eccbuf[di]; | |
1253 | ||
1254 | x[6]=0x55; | |
1255 | x[7]=0x55; | |
1256 | ||
1257 | ret = doc_write_oob(this, to, 8, &dummy, x); | |
1258 | return ret; | |
1259 | } | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1264 | size_t * retlen, u_char * buf) | |
1265 | { | |
1266 | int len256 = 0, ret; | |
1267 | unsigned long docptr; | |
1268 | struct Nand *mychip; | |
1269 | ||
1270 | docptr = this->virtadr; | |
1271 | ||
1272 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1273 | ||
1274 | if (this->curfloor != mychip->floor) { | |
1275 | DoC_SelectFloor(this, mychip->floor); | |
1276 | DoC_SelectChip(this, mychip->chip); | |
1277 | } else if (this->curchip != mychip->chip) { | |
1278 | DoC_SelectChip(this, mychip->chip); | |
1279 | } | |
1280 | this->curfloor = mychip->floor; | |
1281 | this->curchip = mychip->chip; | |
1282 | ||
1283 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1284 | /* page to maintain compatibility with doc_read_ecc. */ | |
1285 | if (this->page256) { | |
1286 | if (!(ofs & 0x8)) | |
1287 | ofs += 0x100; | |
1288 | else | |
1289 | ofs -= 0x8; | |
1290 | } | |
1291 | ||
1292 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1293 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); | |
1294 | ||
1295 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1296 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1297 | /* next OOB block, but it didn't work here. mf. */ | |
1298 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1299 | len256 = (ofs | 0x7) + 1 - ofs; | |
1300 | DoC_ReadBuf(this, buf, len256); | |
1301 | ||
1302 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1303 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), | |
1304 | CDSN_CTRL_WP, 0); | |
1305 | } | |
1306 | ||
1307 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1308 | ||
1309 | *retlen = len; | |
1310 | /* Reading the full OOB data drops us off of the end of the page, | |
8bde7f77 WD |
1311 | * causing the flash device to go into busy mode, so we need |
1312 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ | |
c609719b WD |
1313 | |
1314 | ret = DoC_WaitReady(this); | |
1315 | ||
1316 | return ret; | |
1317 | ||
1318 | } | |
1319 | ||
1320 | int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1321 | size_t * retlen, const u_char * buf) | |
1322 | { | |
1323 | int len256 = 0; | |
1324 | unsigned long docptr = this->virtadr; | |
1325 | struct Nand *mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1326 | volatile int dummy; | |
1327 | ||
1328 | #ifdef PSYCHO_DEBUG | |
1329 | printf("doc_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n", | |
1330 | (long)ofs, len, buf[0], buf[1], buf[2], buf[3], | |
1331 | buf[8], buf[9], buf[14],buf[15]); | |
1332 | #endif | |
1333 | ||
1334 | /* Find the chip which is to be used and select it */ | |
1335 | if (this->curfloor != mychip->floor) { | |
1336 | DoC_SelectFloor(this, mychip->floor); | |
1337 | DoC_SelectChip(this, mychip->chip); | |
1338 | } else if (this->curchip != mychip->chip) { | |
1339 | DoC_SelectChip(this, mychip->chip); | |
1340 | } | |
1341 | this->curfloor = mychip->floor; | |
1342 | this->curchip = mychip->chip; | |
1343 | ||
1344 | /* disable the ECC engine */ | |
1345 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); | |
1346 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); | |
1347 | ||
1348 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
1349 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1350 | ||
1351 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ | |
1352 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1353 | ||
1354 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1355 | /* page to maintain compatibility with doc_read_ecc. */ | |
1356 | if (this->page256) { | |
1357 | if (!(ofs & 0x8)) | |
1358 | ofs += 0x100; | |
1359 | else | |
1360 | ofs -= 0x8; | |
1361 | } | |
1362 | ||
1363 | /* issue the Serial Data In command to initial the Page Program process */ | |
1364 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1365 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); | |
1366 | ||
1367 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1368 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1369 | /* next OOB block, but it didn't work here. mf. */ | |
1370 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1371 | len256 = (ofs | 0x7) + 1 - ofs; | |
1372 | DoC_WriteBuf(this, buf, len256); | |
1373 | ||
1374 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1375 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1376 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1377 | ||
1378 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1379 | DoC_Delay(this, 2); | |
1380 | ||
1381 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1382 | puts ("Error programming oob data\n"); | |
1383 | /* There was an error */ | |
1384 | *retlen = 0; | |
1385 | return DOC_EIO; | |
1386 | } | |
1387 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1388 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); | |
1389 | } | |
1390 | ||
1391 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1392 | ||
1393 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1394 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1395 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1396 | ||
1397 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1398 | DoC_Delay(this, 2); | |
1399 | ||
1400 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1401 | puts ("Error programming oob data\n"); | |
1402 | /* There was an error */ | |
1403 | *retlen = 0; | |
1404 | return DOC_EIO; | |
1405 | } | |
1406 | ||
1407 | *retlen = len; | |
1408 | return 0; | |
1409 | ||
1410 | } | |
1411 | ||
1412 | int doc_erase(struct DiskOnChip* this, loff_t ofs, size_t len) | |
1413 | { | |
1414 | volatile int dummy; | |
1415 | unsigned long docptr; | |
1416 | struct Nand *mychip; | |
1417 | ||
1418 | if (ofs & (this->erasesize-1) || len & (this->erasesize-1)) { | |
1419 | puts ("Offset and size must be sector aligned\n"); | |
1420 | return DOC_EINVAL; | |
1421 | } | |
1422 | ||
1423 | docptr = this->virtadr; | |
1424 | ||
1425 | /* FIXME: Do this in the background. Use timers or schedule_task() */ | |
1426 | while(len) { | |
1427 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1428 | ||
1429 | if (this->curfloor != mychip->floor) { | |
1430 | DoC_SelectFloor(this, mychip->floor); | |
1431 | DoC_SelectChip(this, mychip->chip); | |
1432 | } else if (this->curchip != mychip->chip) { | |
1433 | DoC_SelectChip(this, mychip->chip); | |
1434 | } | |
1435 | this->curfloor = mychip->floor; | |
1436 | this->curchip = mychip->chip; | |
1437 | ||
1438 | DoC_Command(this, NAND_CMD_ERASE1, 0); | |
1439 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); | |
1440 | DoC_Command(this, NAND_CMD_ERASE2, 0); | |
1441 | ||
1442 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1443 | ||
1444 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1445 | DoC_Delay(this, 2); | |
1446 | ||
1447 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1448 | printf("Error erasing at 0x%lx\n", (long)ofs); | |
1449 | /* There was an error */ | |
1450 | goto callback; | |
1451 | } | |
1452 | ofs += this->erasesize; | |
1453 | len -= this->erasesize; | |
1454 | } | |
1455 | ||
1456 | callback: | |
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | static inline int doccheck(unsigned long potential, unsigned long physadr) | |
1461 | { | |
1462 | unsigned long window=potential; | |
1463 | unsigned char tmp, ChipID; | |
1464 | #ifndef DOC_PASSIVE_PROBE | |
1465 | unsigned char tmp2; | |
1466 | #endif | |
1467 | ||
1468 | /* Routine copied from the Linux DOC driver */ | |
1469 | ||
1470 | #ifdef CFG_DOCPROBE_55AA | |
1471 | /* Check for 0x55 0xAA signature at beginning of window, | |
1472 | this is no longer true once we remove the IPL (for Millennium */ | |
1473 | if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa) | |
1474 | return 0; | |
1475 | #endif /* CFG_DOCPROBE_55AA */ | |
1476 | ||
1477 | #ifndef DOC_PASSIVE_PROBE | |
1478 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1479 | * bootup procedure will put the device into reset mode, and | |
1480 | * it's not possible to talk to it without actually writing | |
1481 | * to the DOCControl register. So we store the current contents | |
1482 | * of the DOCControl register's location, in case we later decide | |
1483 | * that it's not a DiskOnChip, and want to put it back how we | |
1484 | * found it. | |
1485 | */ | |
1486 | tmp2 = ReadDOC(window, DOCControl); | |
1487 | ||
1488 | /* Reset the DiskOnChip ASIC */ | |
1489 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1490 | window, DOCControl); | |
1491 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1492 | window, DOCControl); | |
1493 | ||
1494 | /* Enable the DiskOnChip ASIC */ | |
1495 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1496 | window, DOCControl); | |
1497 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1498 | window, DOCControl); | |
1499 | #endif /* !DOC_PASSIVE_PROBE */ | |
1500 | ||
1501 | ChipID = ReadDOC(window, ChipID); | |
1502 | ||
1503 | switch (ChipID) { | |
1504 | case DOC_ChipID_Doc2k: | |
1505 | /* Check the TOGGLE bit in the ECC register */ | |
1506 | tmp = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; | |
1507 | if ((ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT) != tmp) | |
1508 | return ChipID; | |
1509 | break; | |
1510 | ||
1511 | case DOC_ChipID_DocMil: | |
1512 | /* Check the TOGGLE bit in the ECC register */ | |
1513 | tmp = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; | |
1514 | if ((ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT) != tmp) | |
1515 | return ChipID; | |
1516 | break; | |
1517 | ||
1518 | default: | |
1519 | #ifndef CFG_DOCPROBE_55AA | |
1520 | /* | |
1521 | * if the ID isn't the DoC2000 or DoCMillenium ID, so we can assume | |
1522 | * the DOC is missing | |
1523 | */ | |
1524 | # if 0 | |
1525 | printf("Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n", | |
1526 | ChipID, physadr); | |
1527 | # endif | |
1528 | #endif | |
1529 | #ifndef DOC_PASSIVE_PROBE | |
1530 | /* Put back the contents of the DOCControl register, in case it's not | |
1531 | * actually a DiskOnChip. | |
1532 | */ | |
1533 | WriteDOC(tmp2, window, DOCControl); | |
1534 | #endif | |
1535 | return 0; | |
1536 | } | |
1537 | ||
1538 | puts ("DiskOnChip failed TOGGLE test, dropping.\n"); | |
1539 | ||
1540 | #ifndef DOC_PASSIVE_PROBE | |
1541 | /* Put back the contents of the DOCControl register: it's not a DiskOnChip */ | |
1542 | WriteDOC(tmp2, window, DOCControl); | |
1543 | #endif | |
1544 | return 0; | |
1545 | } | |
1546 | ||
1547 | void doc_probe(unsigned long physadr) | |
1548 | { | |
1549 | struct DiskOnChip *this = NULL; | |
1550 | int i=0, ChipID; | |
1551 | ||
1552 | if ((ChipID = doccheck(physadr, physadr))) { | |
1553 | ||
1554 | for (i=0; i<CFG_MAX_DOC_DEVICE; i++) { | |
1555 | if (doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) { | |
1556 | this = doc_dev_desc + i; | |
1557 | break; | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | if (!this) { | |
1562 | puts ("Cannot allocate memory for data structures.\n"); | |
1563 | return; | |
1564 | } | |
1565 | ||
1566 | if (curr_device == -1) | |
1567 | curr_device = i; | |
1568 | ||
1569 | memset((char *)this, 0, sizeof(struct DiskOnChip)); | |
1570 | ||
1571 | this->virtadr = physadr; | |
1572 | this->physadr = physadr; | |
1573 | this->ChipID = ChipID; | |
1574 | ||
1575 | DoC2k_init(this); | |
1576 | } else { | |
1577 | puts ("No DiskOnChip found\n"); | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | #endif /* (CONFIG_COMMANDS & CFG_CMD_DOC) */ |