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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> | |
ac6dbb85 | 14 | #include <linux/mtd/nftl.h> |
c609719b | 15 | #include <linux/mtd/doc2000.h> |
c609719b WD |
16 | |
17 | #ifdef CFG_DOC_SUPPORT_2000 | |
18 | #define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) | |
19 | #else | |
20 | #define DoC_is_2000(doc) (0) | |
21 | #endif | |
22 | ||
23 | #ifdef CFG_DOC_SUPPORT_MILLENNIUM | |
24 | #define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) | |
25 | #else | |
26 | #define DoC_is_Millennium(doc) (0) | |
27 | #endif | |
28 | ||
29 | /* CFG_DOC_PASSIVE_PROBE: | |
30 | In order to ensure that the BIOS checksum is correct at boot time, and | |
31 | hence that the onboard BIOS extension gets executed, the DiskOnChip | |
32 | goes into reset mode when it is read sequentially: all registers | |
33 | return 0xff until the chip is woken up again by writing to the | |
34 | DOCControl register. | |
35 | ||
36 | Unfortunately, this means that the probe for the DiskOnChip is unsafe, | |
37 | because one of the first things it does is write to where it thinks | |
38 | the DOCControl register should be - which may well be shared memory | |
39 | for another device. I've had machines which lock up when this is | |
40 | attempted. Hence the possibility to do a passive probe, which will fail | |
41 | to detect a chip in reset mode, but is at least guaranteed not to lock | |
42 | the machine. | |
43 | ||
44 | If you have this problem, uncomment the following line: | |
45 | #define CFG_DOC_PASSIVE_PROBE | |
46 | */ | |
47 | ||
48 | #undef DOC_DEBUG | |
49 | #undef ECC_DEBUG | |
50 | #undef PSYCHO_DEBUG | |
51 | #undef NFTL_DEBUG | |
52 | ||
53 | static struct DiskOnChip doc_dev_desc[CFG_MAX_DOC_DEVICE]; | |
54 | ||
55 | /* Current DOC Device */ | |
56 | static int curr_device = -1; | |
57 | ||
2fc000d7 MB |
58 | /* Supported NAND flash devices */ |
59 | static struct nand_flash_dev nand_flash_ids[] = { | |
60 | {"Toshiba TC5816BDC", NAND_MFR_TOSHIBA, 0x64, 21, 1, 2, 0x1000, 0}, | |
61 | {"Toshiba TC5832DC", NAND_MFR_TOSHIBA, 0x6b, 22, 0, 2, 0x2000, 0}, | |
62 | {"Toshiba TH58V128DC", NAND_MFR_TOSHIBA, 0x73, 24, 0, 2, 0x4000, 0}, | |
63 | {"Toshiba TC58256FT/DC", NAND_MFR_TOSHIBA, 0x75, 25, 0, 2, 0x4000, 0}, | |
64 | {"Toshiba TH58512FT", NAND_MFR_TOSHIBA, 0x76, 26, 0, 3, 0x4000, 0}, | |
65 | {"Toshiba TC58V32DC", NAND_MFR_TOSHIBA, 0xe5, 22, 0, 2, 0x2000, 0}, | |
66 | {"Toshiba TC58V64AFT/DC", NAND_MFR_TOSHIBA, 0xe6, 23, 0, 2, 0x2000, 0}, | |
67 | {"Toshiba TC58V16BDC", NAND_MFR_TOSHIBA, 0xea, 21, 1, 2, 0x1000, 0}, | |
68 | {"Toshiba TH58100FT", NAND_MFR_TOSHIBA, 0x79, 27, 0, 3, 0x4000, 0}, | |
69 | {"Samsung KM29N16000", NAND_MFR_SAMSUNG, 0x64, 21, 1, 2, 0x1000, 0}, | |
70 | {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0x6b, 22, 0, 2, 0x2000, 0}, | |
71 | {"Samsung KM29U128T", NAND_MFR_SAMSUNG, 0x73, 24, 0, 2, 0x4000, 0}, | |
72 | {"Samsung KM29U256T", NAND_MFR_SAMSUNG, 0x75, 25, 0, 2, 0x4000, 0}, | |
73 | {"Samsung unknown 64Mb", NAND_MFR_SAMSUNG, 0x76, 26, 0, 3, 0x4000, 0}, | |
74 | {"Samsung KM29W32000", NAND_MFR_SAMSUNG, 0xe3, 22, 0, 2, 0x2000, 0}, | |
75 | {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0xe5, 22, 0, 2, 0x2000, 0}, | |
76 | {"Samsung KM29U64000", NAND_MFR_SAMSUNG, 0xe6, 23, 0, 2, 0x2000, 0}, | |
77 | {"Samsung KM29W16000", NAND_MFR_SAMSUNG, 0xea, 21, 1, 2, 0x1000, 0}, | |
78 | {"Samsung K9F5616Q0C", NAND_MFR_SAMSUNG, 0x45, 25, 0, 2, 0x4000, 1}, | |
79 | {"Samsung K9K1216Q0C", NAND_MFR_SAMSUNG, 0x46, 26, 0, 3, 0x4000, 1}, | |
80 | {"Samsung K9F1G08U0M", NAND_MFR_SAMSUNG, 0xf1, 27, 0, 2, 0, 0}, | |
81 | {NULL,} | |
82 | }; | |
83 | ||
c609719b WD |
84 | /* ------------------------------------------------------------------------- */ |
85 | ||
86 | int do_doc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
87 | { | |
88 | int rcode = 0; | |
89 | ||
90 | switch (argc) { | |
91 | case 0: | |
92 | case 1: | |
93 | printf ("Usage:\n%s\n", cmdtp->usage); | |
94 | return 1; | |
95 | case 2: | |
8bde7f77 | 96 | if (strcmp(argv[1],"info") == 0) { |
c609719b WD |
97 | int i; |
98 | ||
99 | putc ('\n'); | |
100 | ||
101 | for (i=0; i<CFG_MAX_DOC_DEVICE; ++i) { | |
102 | if(doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) | |
103 | continue; /* list only known devices */ | |
104 | printf ("Device %d: ", i); | |
105 | doc_print(&doc_dev_desc[i]); | |
106 | } | |
107 | return 0; | |
108 | ||
109 | } else if (strcmp(argv[1],"device") == 0) { | |
110 | if ((curr_device < 0) || (curr_device >= CFG_MAX_DOC_DEVICE)) { | |
111 | puts ("\nno devices available\n"); | |
112 | return 1; | |
113 | } | |
114 | printf ("\nDevice %d: ", curr_device); | |
115 | doc_print(&doc_dev_desc[curr_device]); | |
116 | return 0; | |
117 | } | |
118 | printf ("Usage:\n%s\n", cmdtp->usage); | |
119 | return 1; | |
120 | case 3: | |
121 | if (strcmp(argv[1],"device") == 0) { | |
122 | int dev = (int)simple_strtoul(argv[2], NULL, 10); | |
123 | ||
124 | printf ("\nDevice %d: ", dev); | |
125 | if (dev >= CFG_MAX_DOC_DEVICE) { | |
126 | puts ("unknown device\n"); | |
127 | return 1; | |
128 | } | |
129 | doc_print(&doc_dev_desc[dev]); | |
130 | /*doc_print (dev);*/ | |
131 | ||
132 | if (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN) { | |
133 | return 1; | |
134 | } | |
135 | ||
136 | curr_device = dev; | |
137 | ||
138 | puts ("... is now current device\n"); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | printf ("Usage:\n%s\n", cmdtp->usage); | |
144 | return 1; | |
145 | default: | |
146 | /* at least 4 args */ | |
147 | ||
148 | if (strcmp(argv[1],"read") == 0 || strcmp(argv[1],"write") == 0) { | |
149 | ulong addr = simple_strtoul(argv[2], NULL, 16); | |
150 | ulong off = simple_strtoul(argv[3], NULL, 16); | |
151 | ulong size = simple_strtoul(argv[4], NULL, 16); | |
152 | int cmd = (strcmp(argv[1],"read") == 0); | |
153 | int ret, total; | |
154 | ||
155 | printf ("\nDOC %s: device %d offset %ld, size %ld ... ", | |
156 | cmd ? "read" : "write", curr_device, off, size); | |
157 | ||
158 | ret = doc_rw(doc_dev_desc + curr_device, cmd, off, size, | |
77ddac94 | 159 | (size_t *)&total, (u_char*)addr); |
c609719b WD |
160 | |
161 | printf ("%d bytes %s: %s\n", total, cmd ? "read" : "write", | |
162 | ret ? "ERROR" : "OK"); | |
163 | ||
164 | return ret; | |
165 | } else if (strcmp(argv[1],"erase") == 0) { | |
166 | ulong off = simple_strtoul(argv[2], NULL, 16); | |
167 | ulong size = simple_strtoul(argv[3], NULL, 16); | |
168 | int ret; | |
169 | ||
170 | printf ("\nDOC erase: device %d offset %ld, size %ld ... ", | |
171 | curr_device, off, size); | |
172 | ||
173 | ret = doc_erase (doc_dev_desc + curr_device, off, size); | |
174 | ||
175 | printf("%s\n", ret ? "ERROR" : "OK"); | |
176 | ||
177 | return ret; | |
178 | } else { | |
179 | printf ("Usage:\n%s\n", cmdtp->usage); | |
180 | rcode = 1; | |
181 | } | |
182 | ||
183 | return rcode; | |
184 | } | |
185 | } | |
0d498393 WD |
186 | U_BOOT_CMD( |
187 | doc, 5, 1, do_doc, | |
8bde7f77 WD |
188 | "doc - Disk-On-Chip sub-system\n", |
189 | "info - show available DOC devices\n" | |
190 | "doc device [dev] - show or set current device\n" | |
191 | "doc read addr off size\n" | |
192 | "doc write addr off size - read/write `size'" | |
193 | " bytes starting at offset `off'\n" | |
194 | " to/from memory address `addr'\n" | |
195 | "doc erase off size - erase `size' bytes of DOC from offset `off'\n" | |
196 | ); | |
c609719b WD |
197 | |
198 | int do_docboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
199 | { | |
200 | char *boot_device = NULL; | |
201 | char *ep; | |
202 | int dev; | |
203 | ulong cnt; | |
204 | ulong addr; | |
205 | ulong offset = 0; | |
206 | image_header_t *hdr; | |
207 | int rcode = 0; | |
09475f75 MB |
208 | #if defined(CONFIG_FIT) |
209 | const void *fit_hdr; | |
210 | #endif | |
c609719b | 211 | |
fad63407 | 212 | show_boot_progress (34); |
c609719b WD |
213 | switch (argc) { |
214 | case 1: | |
215 | addr = CFG_LOAD_ADDR; | |
216 | boot_device = getenv ("bootdevice"); | |
217 | break; | |
218 | case 2: | |
219 | addr = simple_strtoul(argv[1], NULL, 16); | |
220 | boot_device = getenv ("bootdevice"); | |
221 | break; | |
222 | case 3: | |
223 | addr = simple_strtoul(argv[1], NULL, 16); | |
224 | boot_device = argv[2]; | |
225 | break; | |
226 | case 4: | |
227 | addr = simple_strtoul(argv[1], NULL, 16); | |
228 | boot_device = argv[2]; | |
229 | offset = simple_strtoul(argv[3], NULL, 16); | |
230 | break; | |
231 | default: | |
232 | printf ("Usage:\n%s\n", cmdtp->usage); | |
fad63407 | 233 | show_boot_progress (-35); |
c609719b WD |
234 | return 1; |
235 | } | |
236 | ||
fad63407 | 237 | show_boot_progress (35); |
c609719b WD |
238 | if (!boot_device) { |
239 | puts ("\n** No boot device **\n"); | |
fad63407 | 240 | show_boot_progress (-36); |
c609719b WD |
241 | return 1; |
242 | } | |
fad63407 | 243 | show_boot_progress (36); |
c609719b WD |
244 | |
245 | dev = simple_strtoul(boot_device, &ep, 16); | |
246 | ||
247 | if ((dev >= CFG_MAX_DOC_DEVICE) || | |
248 | (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN)) { | |
249 | printf ("\n** Device %d not available\n", dev); | |
fad63407 | 250 | show_boot_progress (-37); |
c609719b WD |
251 | return 1; |
252 | } | |
fad63407 | 253 | show_boot_progress (37); |
c609719b WD |
254 | |
255 | printf ("\nLoading from device %d: %s at 0x%lX (offset 0x%lX)\n", | |
256 | dev, doc_dev_desc[dev].name, doc_dev_desc[dev].physadr, | |
257 | offset); | |
258 | ||
259 | if (doc_rw (doc_dev_desc + dev, 1, offset, | |
260 | SECTORSIZE, NULL, (u_char *)addr)) { | |
261 | printf ("** Read error on %d\n", dev); | |
fad63407 | 262 | show_boot_progress (-38); |
c609719b WD |
263 | return 1; |
264 | } | |
fad63407 | 265 | show_boot_progress (38); |
c609719b | 266 | |
9a4daad0 | 267 | switch (genimg_get_format ((void *)addr)) { |
d5934ad7 MB |
268 | case IMAGE_FORMAT_LEGACY: |
269 | hdr = (image_header_t *)addr; | |
c609719b | 270 | |
09475f75 | 271 | image_print_contents (hdr); |
c609719b | 272 | |
09475f75 | 273 | cnt = image_get_image_size (hdr); |
d5934ad7 MB |
274 | break; |
275 | #if defined(CONFIG_FIT) | |
276 | case IMAGE_FORMAT_FIT: | |
09475f75 MB |
277 | fit_hdr = (const void *)addr; |
278 | if (!fit_check_format (fit_hdr)) { | |
1372cce2 | 279 | show_boot_progress (-130); |
09475f75 MB |
280 | puts ("** Bad FIT image format\n"); |
281 | return 1; | |
282 | } | |
1372cce2 | 283 | show_boot_progress (131); |
09475f75 MB |
284 | puts ("Fit image detected...\n"); |
285 | ||
286 | cnt = fit_get_size (fit_hdr); | |
287 | break; | |
d5934ad7 MB |
288 | #endif |
289 | default: | |
09475f75 | 290 | show_boot_progress (-39); |
d5934ad7 | 291 | puts ("** Unknown image type\n"); |
c609719b WD |
292 | return 1; |
293 | } | |
fad63407 | 294 | show_boot_progress (39); |
c609719b | 295 | |
09475f75 | 296 | cnt -= SECTORSIZE; |
c609719b WD |
297 | if (doc_rw (doc_dev_desc + dev, 1, offset + SECTORSIZE, cnt, |
298 | NULL, (u_char *)(addr+SECTORSIZE))) { | |
299 | printf ("** Read error on %d\n", dev); | |
fad63407 | 300 | show_boot_progress (-40); |
c609719b WD |
301 | return 1; |
302 | } | |
fad63407 | 303 | show_boot_progress (40); |
c609719b | 304 | |
09475f75 MB |
305 | #if defined(CONFIG_FIT) |
306 | /* This cannot be done earlier, we need complete FIT image in RAM first */ | |
307 | if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) | |
308 | fit_print_contents ((const void *)addr); | |
309 | #endif | |
310 | ||
c609719b WD |
311 | /* Loading ok, update default load address */ |
312 | ||
313 | load_addr = addr; | |
314 | ||
315 | /* Check if we should attempt an auto-start */ | |
316 | if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { | |
317 | char *local_args[2]; | |
318 | extern int do_bootm (cmd_tbl_t *, int, int, char *[]); | |
319 | ||
320 | local_args[0] = argv[0]; | |
321 | local_args[1] = NULL; | |
322 | ||
323 | printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); | |
324 | ||
325 | do_bootm (cmdtp, 0, 1, local_args); | |
326 | rcode = 1; | |
327 | } | |
328 | return rcode; | |
329 | } | |
330 | ||
0d498393 WD |
331 | U_BOOT_CMD( |
332 | docboot, 4, 1, do_docboot, | |
8bde7f77 WD |
333 | "docboot - boot from DOC device\n", |
334 | "loadAddr dev\n" | |
335 | ); | |
336 | ||
c609719b WD |
337 | int doc_rw (struct DiskOnChip* this, int cmd, |
338 | loff_t from, size_t len, | |
339 | size_t * retlen, u_char * buf) | |
340 | { | |
341 | int noecc, ret = 0, n, total = 0; | |
342 | char eccbuf[6]; | |
343 | ||
344 | while(len) { | |
345 | /* The ECC will not be calculated correctly if | |
346 | less than 512 is written or read */ | |
347 | noecc = (from != (from | 0x1ff) + 1) || (len < 0x200); | |
348 | ||
349 | if (cmd) | |
350 | ret = doc_read_ecc(this, from, len, | |
77ddac94 WD |
351 | (size_t *)&n, (u_char*)buf, |
352 | noecc ? (uchar *)NULL : (uchar *)eccbuf); | |
c609719b WD |
353 | else |
354 | ret = doc_write_ecc(this, from, len, | |
77ddac94 WD |
355 | (size_t *)&n, (u_char*)buf, |
356 | noecc ? (uchar *)NULL : (uchar *)eccbuf); | |
c609719b WD |
357 | |
358 | if (ret) | |
359 | break; | |
360 | ||
361 | from += n; | |
362 | buf += n; | |
363 | total += n; | |
364 | len -= n; | |
365 | } | |
366 | ||
367 | if (retlen) | |
368 | *retlen = total; | |
369 | ||
370 | return ret; | |
371 | } | |
372 | ||
373 | void doc_print(struct DiskOnChip *this) { | |
374 | printf("%s at 0x%lX,\n" | |
375 | "\t %d chip%s %s, size %d MB, \n" | |
376 | "\t total size %ld MB, sector size %ld kB\n", | |
377 | this->name, this->physadr, this->numchips, | |
378 | this->numchips>1 ? "s" : "", this->chips_name, | |
379 | 1 << (this->chipshift - 20), | |
380 | this->totlen >> 20, this->erasesize >> 10); | |
381 | ||
382 | if (this->nftl_found) { | |
383 | struct NFTLrecord *nftl = &this->nftl; | |
384 | unsigned long bin_size, flash_size; | |
385 | ||
386 | bin_size = nftl->nb_boot_blocks * this->erasesize; | |
387 | flash_size = (nftl->nb_blocks - nftl->nb_boot_blocks) * this->erasesize; | |
388 | ||
389 | printf("\t NFTL boot record:\n" | |
390 | "\t Binary partition: size %ld%s\n" | |
391 | "\t Flash disk partition: size %ld%s, offset 0x%lx\n", | |
392 | bin_size > (1 << 20) ? bin_size >> 20 : bin_size >> 10, | |
393 | bin_size > (1 << 20) ? "MB" : "kB", | |
394 | flash_size > (1 << 20) ? flash_size >> 20 : flash_size >> 10, | |
395 | flash_size > (1 << 20) ? "MB" : "kB", bin_size); | |
396 | } else { | |
397 | puts ("\t No NFTL boot record found.\n"); | |
398 | } | |
399 | } | |
400 | ||
401 | /* ------------------------------------------------------------------------- */ | |
402 | ||
403 | /* This function is needed to avoid calls of the __ashrdi3 function. */ | |
404 | static int shr(int val, int shift) { | |
405 | return val >> shift; | |
406 | } | |
407 | ||
408 | /* Perform the required delay cycles by reading from the appropriate register */ | |
409 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) | |
410 | { | |
411 | volatile char dummy; | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < cycles; i++) { | |
415 | if (DoC_is_Millennium(doc)) | |
416 | dummy = ReadDOC(doc->virtadr, NOP); | |
417 | else | |
418 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
419 | } | |
420 | ||
421 | } | |
422 | ||
423 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
424 | static int _DoC_WaitReady(struct DiskOnChip *doc) | |
425 | { | |
426 | unsigned long docptr = doc->virtadr; | |
427 | unsigned long start = get_timer(0); | |
428 | ||
429 | #ifdef PSYCHO_DEBUG | |
430 | puts ("_DoC_WaitReady called for out-of-line wait\n"); | |
431 | #endif | |
432 | ||
433 | /* Out-of-line routine to wait for chip response */ | |
434 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
435 | #ifdef CFG_DOC_SHORT_TIMEOUT | |
436 | /* it seems that after a certain time the DoC deasserts | |
437 | * the CDSN_CTRL_FR_B although it is not ready... | |
438 | * using a short timout solve this (timer increments every ms) */ | |
439 | if (get_timer(start) > 10) { | |
440 | return DOC_ETIMEOUT; | |
441 | } | |
442 | #else | |
443 | if (get_timer(start) > 10 * 1000) { | |
444 | puts ("_DoC_WaitReady timed out.\n"); | |
445 | return DOC_ETIMEOUT; | |
446 | } | |
447 | #endif | |
448 | udelay(1); | |
8bde7f77 | 449 | } |
c609719b WD |
450 | |
451 | return 0; | |
452 | } | |
453 | ||
454 | static int DoC_WaitReady(struct DiskOnChip *doc) | |
455 | { | |
456 | unsigned long docptr = doc->virtadr; | |
457 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
458 | int ret = 0; | |
459 | ||
460 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl | |
461 | see Software Requirement 11.4 item 2. */ | |
462 | DoC_Delay(doc, 4); | |
463 | ||
464 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
465 | /* Call the out-of-line routine to wait */ | |
466 | ret = _DoC_WaitReady(doc); | |
467 | ||
468 | /* issue 2 read from NOP register after reading from CDSNControl register | |
469 | see Software Requirement 11.4 item 2. */ | |
470 | DoC_Delay(doc, 2); | |
471 | ||
472 | return ret; | |
473 | } | |
474 | ||
475 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to | |
476 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
477 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
478 | ||
479 | static inline int DoC_Command(struct DiskOnChip *doc, unsigned char command, | |
480 | unsigned char xtraflags) | |
481 | { | |
482 | unsigned long docptr = doc->virtadr; | |
483 | ||
484 | if (DoC_is_2000(doc)) | |
485 | xtraflags |= CDSN_CTRL_FLASH_IO; | |
486 | ||
487 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ | |
488 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); | |
489 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
490 | ||
491 | if (DoC_is_Millennium(doc)) | |
492 | WriteDOC(command, docptr, CDSNSlowIO); | |
493 | ||
494 | /* Send the command */ | |
495 | WriteDOC_(command, docptr, doc->ioreg); | |
496 | ||
497 | /* Lower the CLE line */ | |
498 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); | |
499 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
500 | ||
501 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ | |
502 | return DoC_WaitReady(doc); | |
503 | } | |
504 | ||
505 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to | |
506 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
507 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
508 | ||
509 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, | |
510 | unsigned char xtraflags1, unsigned char xtraflags2) | |
511 | { | |
512 | unsigned long docptr; | |
513 | int i; | |
514 | ||
515 | docptr = doc->virtadr; | |
516 | ||
517 | if (DoC_is_2000(doc)) | |
518 | xtraflags1 |= CDSN_CTRL_FLASH_IO; | |
519 | ||
520 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ | |
521 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); | |
522 | ||
523 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
524 | ||
525 | /* Send the address */ | |
526 | /* Devices with 256-byte page are addressed as: | |
527 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) | |
528 | * there is no device on the market with page256 | |
529 | and more than 24 bits. | |
530 | Devices with 512-byte page are addressed as: | |
531 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) | |
532 | * 25-31 is sent only if the chip support it. | |
533 | * bit 8 changes the read command to be sent | |
534 | (NAND_CMD_READ0 or NAND_CMD_READ1). | |
535 | */ | |
536 | ||
537 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { | |
538 | if (DoC_is_Millennium(doc)) | |
539 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
540 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
541 | } | |
542 | ||
543 | if (doc->page256) { | |
544 | ofs = ofs >> 8; | |
545 | } else { | |
546 | ofs = ofs >> 9; | |
547 | } | |
548 | ||
549 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { | |
550 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { | |
551 | if (DoC_is_Millennium(doc)) | |
552 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
553 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
554 | } | |
555 | } | |
556 | ||
557 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ | |
558 | ||
559 | /* FIXME: The SlowIO's for millennium could be replaced by | |
560 | a single WritePipeTerm here. mf. */ | |
561 | ||
562 | /* Lower the ALE line */ | |
563 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, | |
564 | CDSNControl); | |
565 | ||
566 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
567 | ||
568 | /* Wait for the chip to respond - Software requirement 11.4.1 */ | |
569 | return DoC_WaitReady(doc); | |
570 | } | |
571 | ||
7152b1d0 | 572 | /* Read a buffer from DoC, taking care of Millennium oddities */ |
c609719b WD |
573 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) |
574 | { | |
575 | volatile int dummy; | |
576 | int modulus = 0xffff; | |
577 | unsigned long docptr; | |
578 | int i; | |
579 | ||
580 | docptr = doc->virtadr; | |
581 | ||
582 | if (len <= 0) | |
583 | return; | |
584 | ||
585 | if (DoC_is_Millennium(doc)) { | |
586 | /* Read the data via the internal pipeline through CDSN IO register, | |
587 | see Pipelined Read Operations 11.3 */ | |
588 | dummy = ReadDOC(docptr, ReadPipeInit); | |
589 | ||
590 | /* Millennium should use the LastDataRead register - Pipeline Reads */ | |
591 | len--; | |
592 | ||
593 | /* This is needed for correctly ECC calculation */ | |
594 | modulus = 0xff; | |
595 | } | |
596 | ||
597 | for (i = 0; i < len; i++) | |
598 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); | |
599 | ||
600 | if (DoC_is_Millennium(doc)) { | |
601 | buf[i] = ReadDOC(docptr, LastDataRead); | |
602 | } | |
603 | } | |
604 | ||
7152b1d0 | 605 | /* Write a buffer to DoC, taking care of Millennium oddities */ |
c609719b WD |
606 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) |
607 | { | |
608 | unsigned long docptr; | |
609 | int i; | |
610 | ||
611 | docptr = doc->virtadr; | |
612 | ||
613 | if (len <= 0) | |
614 | return; | |
615 | ||
616 | for (i = 0; i < len; i++) | |
617 | WriteDOC_(buf[i], docptr, doc->ioreg + i); | |
618 | ||
619 | if (DoC_is_Millennium(doc)) { | |
620 | WriteDOC(0x00, docptr, WritePipeTerm); | |
621 | } | |
622 | } | |
623 | ||
624 | ||
625 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
626 | ||
627 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) | |
628 | { | |
629 | unsigned long docptr = doc->virtadr; | |
630 | ||
631 | /* Software requirement 11.4.4 before writing DeviceSelect */ | |
632 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ | |
633 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); | |
634 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
635 | ||
636 | /* Select the individual flash chip requested */ | |
637 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
638 | DoC_Delay(doc, 4); | |
639 | ||
640 | /* Reassert the CE line */ | |
641 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, | |
642 | CDSNControl); | |
643 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
644 | ||
645 | /* Wait for it to be ready */ | |
646 | return DoC_WaitReady(doc); | |
647 | } | |
648 | ||
649 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
650 | ||
651 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) | |
652 | { | |
653 | unsigned long docptr = doc->virtadr; | |
654 | ||
655 | /* Select the floor (bank) of chips required */ | |
656 | WriteDOC(floor, docptr, FloorSelect); | |
657 | ||
658 | /* Wait for the chip to be ready */ | |
659 | return DoC_WaitReady(doc); | |
660 | } | |
661 | ||
662 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
663 | ||
664 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
665 | { | |
666 | int mfr, id, i; | |
667 | volatile char dummy; | |
668 | ||
669 | /* Page in the required floor/chip */ | |
670 | DoC_SelectFloor(doc, floor); | |
671 | DoC_SelectChip(doc, chip); | |
672 | ||
673 | /* Reset the chip */ | |
674 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { | |
675 | #ifdef DOC_DEBUG | |
676 | printf("DoC_Command (reset) for %d,%d returned true\n", | |
677 | floor, chip); | |
678 | #endif | |
679 | return 0; | |
680 | } | |
681 | ||
682 | ||
683 | /* Read the NAND chip ID: 1. Send ReadID command */ | |
684 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { | |
685 | #ifdef DOC_DEBUG | |
686 | printf("DoC_Command (ReadID) for %d,%d returned true\n", | |
687 | floor, chip); | |
688 | #endif | |
689 | return 0; | |
690 | } | |
691 | ||
692 | /* Read the NAND chip ID: 2. Send address byte zero */ | |
693 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); | |
694 | ||
695 | /* Read the manufacturer and device id codes from the device */ | |
696 | ||
697 | /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ | |
698 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
699 | DoC_Delay(doc, 2); | |
700 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); | |
701 | ||
702 | /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ | |
703 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
704 | DoC_Delay(doc, 2); | |
705 | id = ReadDOC_(doc->virtadr, doc->ioreg); | |
706 | ||
707 | /* No response - return failure */ | |
708 | if (mfr == 0xff || mfr == 0) | |
709 | return 0; | |
710 | ||
711 | /* Check it's the same as the first chip we identified. | |
712 | * M-Systems say that any given DiskOnChip device should only | |
713 | * contain _one_ type of flash part, although that's not a | |
714 | * hardware restriction. */ | |
715 | if (doc->mfr) { | |
716 | if (doc->mfr == mfr && doc->id == id) | |
717 | return 1; /* This is another the same the first */ | |
718 | else | |
719 | printf("Flash chip at floor %d, chip %d is different:\n", | |
720 | floor, chip); | |
721 | } | |
722 | ||
723 | /* Print and store the manufacturer and ID codes. */ | |
724 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
725 | if (mfr == nand_flash_ids[i].manufacture_id && | |
726 | id == nand_flash_ids[i].model_id) { | |
727 | #ifdef DOC_DEBUG | |
728 | printf("Flash chip found: Manufacturer ID: %2.2X, " | |
729 | "Chip ID: %2.2X (%s)\n", mfr, id, | |
730 | nand_flash_ids[i].name); | |
731 | #endif | |
732 | if (!doc->mfr) { | |
733 | doc->mfr = mfr; | |
734 | doc->id = id; | |
735 | doc->chipshift = | |
736 | nand_flash_ids[i].chipshift; | |
737 | doc->page256 = nand_flash_ids[i].page256; | |
738 | doc->pageadrlen = | |
739 | nand_flash_ids[i].pageadrlen; | |
740 | doc->erasesize = | |
741 | nand_flash_ids[i].erasesize; | |
742 | doc->chips_name = | |
743 | nand_flash_ids[i].name; | |
744 | return 1; | |
745 | } | |
746 | return 0; | |
747 | } | |
748 | } | |
749 | ||
750 | ||
751 | #ifdef DOC_DEBUG | |
752 | /* We haven't fully identified the chip. Print as much as we know. */ | |
753 | printf("Unknown flash chip found: %2.2X %2.2X\n", | |
754 | id, mfr); | |
755 | #endif | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
761 | ||
762 | static void DoC_ScanChips(struct DiskOnChip *this) | |
763 | { | |
764 | int floor, chip; | |
765 | int numchips[MAX_FLOORS]; | |
766 | int maxchips = MAX_CHIPS; | |
767 | int ret = 1; | |
768 | ||
769 | this->numchips = 0; | |
770 | this->mfr = 0; | |
771 | this->id = 0; | |
772 | ||
773 | if (DoC_is_Millennium(this)) | |
774 | maxchips = MAX_CHIPS_MIL; | |
775 | ||
776 | /* For each floor, find the number of valid chips it contains */ | |
777 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
778 | ret = 1; | |
779 | numchips[floor] = 0; | |
780 | for (chip = 0; chip < maxchips && ret != 0; chip++) { | |
781 | ||
782 | ret = DoC_IdentChip(this, floor, chip); | |
783 | if (ret) { | |
784 | numchips[floor]++; | |
785 | this->numchips++; | |
786 | } | |
787 | } | |
788 | } | |
789 | ||
790 | /* If there are none at all that we recognise, bail */ | |
791 | if (!this->numchips) { | |
792 | puts ("No flash chips recognised.\n"); | |
793 | return; | |
794 | } | |
795 | ||
796 | /* Allocate an array to hold the information for each chip */ | |
797 | this->chips = malloc(sizeof(struct Nand) * this->numchips); | |
798 | if (!this->chips) { | |
799 | puts ("No memory for allocating chip info structures\n"); | |
800 | return; | |
801 | } | |
802 | ||
803 | ret = 0; | |
804 | ||
805 | /* Fill out the chip array with {floor, chipno} for each | |
806 | * detected chip in the device. */ | |
807 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
808 | for (chip = 0; chip < numchips[floor]; chip++) { | |
809 | this->chips[ret].floor = floor; | |
810 | this->chips[ret].chip = chip; | |
811 | this->chips[ret].curadr = 0; | |
812 | this->chips[ret].curmode = 0x50; | |
813 | ret++; | |
814 | } | |
815 | } | |
816 | ||
817 | /* Calculate and print the total size of the device */ | |
818 | this->totlen = this->numchips * (1 << this->chipshift); | |
819 | ||
820 | #ifdef DOC_DEBUG | |
821 | printf("%d flash chips found. Total DiskOnChip size: %ld MB\n", | |
822 | this->numchips, this->totlen >> 20); | |
823 | #endif | |
824 | } | |
825 | ||
826 | /* find_boot_record: Find the NFTL Media Header and its Spare copy which contains the | |
827 | * various device information of the NFTL partition and Bad Unit Table. Update | |
828 | * the ReplUnitTable[] table accroding to the Bad Unit Table. ReplUnitTable[] | |
829 | * is used for management of Erase Unit in other routines in nftl.c and nftlmount.c | |
830 | */ | |
831 | static int find_boot_record(struct NFTLrecord *nftl) | |
832 | { | |
833 | struct nftl_uci1 h1; | |
834 | struct nftl_oob oob; | |
835 | unsigned int block, boot_record_count = 0; | |
836 | int retlen; | |
837 | u8 buf[SECTORSIZE]; | |
838 | struct NFTLMediaHeader *mh = &nftl->MediaHdr; | |
839 | unsigned int i; | |
840 | ||
841 | nftl->MediaUnit = BLOCK_NIL; | |
842 | nftl->SpareMediaUnit = BLOCK_NIL; | |
843 | ||
844 | /* search for a valid boot record */ | |
845 | for (block = 0; block < nftl->nb_blocks; block++) { | |
846 | int ret; | |
847 | ||
848 | /* Check for ANAND header first. Then can whinge if it's found but later | |
849 | checks fail */ | |
850 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize, SECTORSIZE, | |
77ddac94 | 851 | (size_t *)&retlen, buf, NULL))) { |
c609719b WD |
852 | static int warncount = 5; |
853 | ||
854 | if (warncount) { | |
855 | printf("Block read at 0x%x failed\n", block * nftl->EraseSize); | |
856 | if (!--warncount) | |
857 | puts ("Further failures for this block will not be printed\n"); | |
858 | } | |
859 | continue; | |
860 | } | |
861 | ||
862 | if (retlen < 6 || memcmp(buf, "ANAND", 6)) { | |
863 | /* ANAND\0 not found. Continue */ | |
864 | #ifdef PSYCHO_DEBUG | |
865 | printf("ANAND header not found at 0x%x\n", block * nftl->EraseSize); | |
866 | #endif | |
867 | continue; | |
868 | } | |
869 | ||
870 | #ifdef NFTL_DEBUG | |
871 | printf("ANAND header found at 0x%x\n", block * nftl->EraseSize); | |
872 | #endif | |
873 | ||
874 | /* To be safer with BIOS, also use erase mark as discriminant */ | |
875 | if ((ret = doc_read_oob(nftl->mtd, block * nftl->EraseSize + SECTORSIZE + 8, | |
77ddac94 | 876 | 8, (size_t *)&retlen, (uchar *)&h1) < 0)) { |
c609719b WD |
877 | #ifdef NFTL_DEBUG |
878 | printf("ANAND header found at 0x%x, but OOB data read failed\n", | |
879 | block * nftl->EraseSize); | |
880 | #endif | |
881 | continue; | |
882 | } | |
883 | ||
884 | /* OK, we like it. */ | |
885 | ||
886 | if (boot_record_count) { | |
887 | /* We've already processed one. So we just check if | |
888 | this one is the same as the first one we found */ | |
889 | if (memcmp(mh, buf, sizeof(struct NFTLMediaHeader))) { | |
890 | #ifdef NFTL_DEBUG | |
891 | printf("NFTL Media Headers at 0x%x and 0x%x disagree.\n", | |
892 | nftl->MediaUnit * nftl->EraseSize, block * nftl->EraseSize); | |
893 | #endif | |
894 | /* if (debug) Print both side by side */ | |
895 | return -1; | |
896 | } | |
897 | if (boot_record_count == 1) | |
898 | nftl->SpareMediaUnit = block; | |
899 | ||
900 | boot_record_count++; | |
901 | continue; | |
902 | } | |
903 | ||
904 | /* This is the first we've seen. Copy the media header structure into place */ | |
905 | memcpy(mh, buf, sizeof(struct NFTLMediaHeader)); | |
906 | ||
907 | /* Do some sanity checks on it */ | |
7205e407 WD |
908 | if (mh->UnitSizeFactor == 0) { |
909 | #ifdef NFTL_DEBUG | |
910 | puts ("UnitSizeFactor 0x00 detected.\n" | |
911 | "This violates the spec but we think we know what it means...\n"); | |
912 | #endif | |
913 | } else if (mh->UnitSizeFactor != 0xff) { | |
914 | printf ("Sorry, we don't support UnitSizeFactor " | |
c609719b WD |
915 | "of != 1 yet.\n"); |
916 | return -1; | |
917 | } | |
918 | ||
919 | nftl->nb_boot_blocks = le16_to_cpu(mh->FirstPhysicalEUN); | |
920 | if ((nftl->nb_boot_blocks + 2) >= nftl->nb_blocks) { | |
921 | printf ("NFTL Media Header sanity check failed:\n" | |
922 | "nb_boot_blocks (%d) + 2 > nb_blocks (%d)\n", | |
923 | nftl->nb_boot_blocks, nftl->nb_blocks); | |
924 | return -1; | |
925 | } | |
926 | ||
927 | nftl->numvunits = le32_to_cpu(mh->FormattedSize) / nftl->EraseSize; | |
928 | if (nftl->numvunits > (nftl->nb_blocks - nftl->nb_boot_blocks - 2)) { | |
929 | printf ("NFTL Media Header sanity check failed:\n" | |
930 | "numvunits (%d) > nb_blocks (%d) - nb_boot_blocks(%d) - 2\n", | |
931 | nftl->numvunits, | |
932 | nftl->nb_blocks, | |
933 | nftl->nb_boot_blocks); | |
934 | return -1; | |
935 | } | |
936 | ||
937 | nftl->nr_sects = nftl->numvunits * (nftl->EraseSize / SECTORSIZE); | |
938 | ||
939 | /* If we're not using the last sectors in the device for some reason, | |
940 | reduce nb_blocks accordingly so we forget they're there */ | |
941 | nftl->nb_blocks = le16_to_cpu(mh->NumEraseUnits) + le16_to_cpu(mh->FirstPhysicalEUN); | |
942 | ||
943 | /* read the Bad Erase Unit Table and modify ReplUnitTable[] accordingly */ | |
944 | for (i = 0; i < nftl->nb_blocks; i++) { | |
945 | if ((i & (SECTORSIZE - 1)) == 0) { | |
946 | /* read one sector for every SECTORSIZE of blocks */ | |
947 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize + | |
948 | i + SECTORSIZE, SECTORSIZE, | |
77ddac94 | 949 | (size_t *)&retlen, buf, (uchar *)&oob)) < 0) { |
c609719b WD |
950 | puts ("Read of bad sector table failed\n"); |
951 | return -1; | |
952 | } | |
953 | } | |
954 | /* mark the Bad Erase Unit as RESERVED in ReplUnitTable */ | |
955 | if (buf[i & (SECTORSIZE - 1)] != 0xff) | |
956 | nftl->ReplUnitTable[i] = BLOCK_RESERVED; | |
957 | } | |
958 | ||
959 | nftl->MediaUnit = block; | |
960 | boot_record_count++; | |
961 | ||
962 | } /* foreach (block) */ | |
963 | ||
964 | return boot_record_count?0:-1; | |
965 | } | |
966 | ||
967 | /* This routine is made available to other mtd code via | |
968 | * inter_module_register. It must only be accessed through | |
969 | * inter_module_get which will bump the use count of this module. The | |
970 | * addresses passed back in mtd are valid as long as the use count of | |
971 | * this module is non-zero, i.e. between inter_module_get and | |
972 | * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. | |
973 | */ | |
974 | static void DoC2k_init(struct DiskOnChip* this) | |
975 | { | |
976 | struct NFTLrecord *nftl; | |
977 | ||
978 | switch (this->ChipID) { | |
979 | case DOC_ChipID_Doc2k: | |
980 | this->name = "DiskOnChip 2000"; | |
981 | this->ioreg = DoC_2k_CDSN_IO; | |
982 | break; | |
983 | case DOC_ChipID_DocMil: | |
984 | this->name = "DiskOnChip Millennium"; | |
985 | this->ioreg = DoC_Mil_CDSN_IO; | |
986 | break; | |
987 | } | |
988 | ||
989 | #ifdef DOC_DEBUG | |
990 | printf("%s found at address 0x%lX\n", this->name, | |
991 | this->physadr); | |
992 | #endif | |
993 | ||
994 | this->totlen = 0; | |
995 | this->numchips = 0; | |
996 | ||
997 | this->curfloor = -1; | |
998 | this->curchip = -1; | |
999 | ||
1000 | /* Ident all the chips present. */ | |
1001 | DoC_ScanChips(this); | |
7205e407 WD |
1002 | if ((!this->numchips) || (!this->chips)) |
1003 | return; | |
c609719b WD |
1004 | |
1005 | nftl = &this->nftl; | |
1006 | ||
1007 | /* Get physical parameters */ | |
1008 | nftl->EraseSize = this->erasesize; | |
8bde7f77 | 1009 | nftl->nb_blocks = this->totlen / this->erasesize; |
c609719b WD |
1010 | nftl->mtd = this; |
1011 | ||
1012 | if (find_boot_record(nftl) != 0) | |
1013 | this->nftl_found = 0; | |
1014 | else | |
1015 | this->nftl_found = 1; | |
1016 | ||
1017 | printf("%s @ 0x%lX, %ld MB\n", this->name, this->physadr, this->totlen >> 20); | |
1018 | } | |
1019 | ||
1020 | int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len, | |
1021 | size_t * retlen, u_char * buf, u_char * eccbuf) | |
1022 | { | |
1023 | unsigned long docptr; | |
1024 | struct Nand *mychip; | |
1025 | unsigned char syndrome[6]; | |
1026 | volatile char dummy; | |
1027 | int i, len256 = 0, ret=0; | |
1028 | ||
1029 | docptr = this->virtadr; | |
1030 | ||
1031 | /* Don't allow read past end of device */ | |
1032 | if (from >= this->totlen) { | |
1033 | puts ("Out of flash\n"); | |
1034 | return DOC_EINVAL; | |
1035 | } | |
1036 | ||
1037 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
1038 | if (from + len > ((from | 0x1ff) + 1)) | |
1039 | len = ((from | 0x1ff) + 1) - from; | |
1040 | ||
1041 | /* The ECC will not be calculated correctly if less than 512 is read */ | |
1042 | if (len != 0x200 && eccbuf) | |
1043 | printf("ECC needs a full sector read (adr: %lx size %lx)\n", | |
1044 | (long) from, (long) len); | |
1045 | ||
7152b1d0 | 1046 | #ifdef PSYCHO_DEBUG |
c609719b WD |
1047 | printf("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); |
1048 | #endif | |
1049 | ||
1050 | /* Find the chip which is to be used and select it */ | |
1051 | mychip = &this->chips[shr(from, this->chipshift)]; | |
1052 | ||
1053 | if (this->curfloor != mychip->floor) { | |
1054 | DoC_SelectFloor(this, mychip->floor); | |
1055 | DoC_SelectChip(this, mychip->chip); | |
1056 | } else if (this->curchip != mychip->chip) { | |
1057 | DoC_SelectChip(this, mychip->chip); | |
1058 | } | |
1059 | ||
1060 | this->curfloor = mychip->floor; | |
1061 | this->curchip = mychip->chip; | |
1062 | ||
1063 | DoC_Command(this, | |
1064 | (!this->page256 | |
1065 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1066 | CDSN_CTRL_WP); | |
1067 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, | |
1068 | CDSN_CTRL_ECC_IO); | |
1069 | ||
1070 | if (eccbuf) { | |
1071 | /* Prime the ECC engine */ | |
1072 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1073 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
1074 | } else { | |
1075 | /* disable the ECC engine */ | |
1076 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1077 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1078 | } | |
1079 | ||
1080 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1081 | if (this->page256 && from + len > (from | 0xff) + 1) { | |
1082 | len256 = (from | 0xff) + 1 - from; | |
1083 | DoC_ReadBuf(this, buf, len256); | |
1084 | ||
1085 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); | |
1086 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, | |
1087 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); | |
1088 | } | |
1089 | ||
1090 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1091 | ||
1092 | /* Let the caller know we completed it */ | |
1093 | *retlen = len; | |
1094 | ||
1095 | if (eccbuf) { | |
1096 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1097 | /* Note: this will work even with 2M x 8bit devices as */ | |
1098 | /* they have 8 bytes of OOB per 256 page. mf. */ | |
1099 | DoC_ReadBuf(this, eccbuf, 6); | |
1100 | ||
1101 | /* Flush the pipeline */ | |
1102 | if (DoC_is_Millennium(this)) { | |
1103 | dummy = ReadDOC(docptr, ECCConf); | |
1104 | dummy = ReadDOC(docptr, ECCConf); | |
1105 | i = ReadDOC(docptr, ECCConf); | |
1106 | } else { | |
1107 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1108 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1109 | i = ReadDOC(docptr, 2k_ECCStatus); | |
1110 | } | |
1111 | ||
1112 | /* Check the ECC Status */ | |
1113 | if (i & 0x80) { | |
1114 | int nb_errors; | |
1115 | /* There was an ECC error */ | |
1116 | #ifdef ECC_DEBUG | |
1117 | printf("DiskOnChip ECC Error: Read at %lx\n", (long)from); | |
1118 | #endif | |
1119 | /* Read the ECC syndrom through the DiskOnChip ECC logic. | |
1120 | These syndrome will be all ZERO when there is no error */ | |
1121 | for (i = 0; i < 6; i++) { | |
1122 | syndrome[i] = | |
1123 | ReadDOC(docptr, ECCSyndrome0 + i); | |
1124 | } | |
8bde7f77 | 1125 | nb_errors = doc_decode_ecc(buf, syndrome); |
c609719b WD |
1126 | |
1127 | #ifdef ECC_DEBUG | |
1128 | printf("Errors corrected: %x\n", nb_errors); | |
1129 | #endif | |
8bde7f77 | 1130 | if (nb_errors < 0) { |
c609719b WD |
1131 | /* We return error, but have actually done the read. Not that |
1132 | this can be told to user-space, via sys_read(), but at least | |
1133 | MTD-aware stuff can know about it by checking *retlen */ | |
1134 | printf("ECC Errors at %lx\n", (long)from); | |
1135 | ret = DOC_EECC; | |
8bde7f77 | 1136 | } |
c609719b WD |
1137 | } |
1138 | ||
1139 | #ifdef PSYCHO_DEBUG | |
1140 | printf("ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1141 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], | |
1142 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
1143 | #endif | |
1144 | ||
1145 | /* disable the ECC engine */ | |
1146 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); | |
1147 | } | |
1148 | ||
1149 | /* according to 11.4.1, we need to wait for the busy line | |
8bde7f77 | 1150 | * drop if we read to the end of the page. */ |
c609719b WD |
1151 | if(0 == ((from + *retlen) & 0x1ff)) |
1152 | { | |
1153 | DoC_WaitReady(this); | |
1154 | } | |
1155 | ||
1156 | return ret; | |
1157 | } | |
1158 | ||
1159 | int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len, | |
1160 | size_t * retlen, const u_char * buf, | |
1161 | u_char * eccbuf) | |
1162 | { | |
1163 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ | |
1164 | unsigned long docptr; | |
1165 | volatile char dummy; | |
1166 | int len256 = 0; | |
1167 | struct Nand *mychip; | |
1168 | ||
1169 | docptr = this->virtadr; | |
1170 | ||
1171 | /* Don't allow write past end of device */ | |
1172 | if (to >= this->totlen) { | |
1173 | puts ("Out of flash\n"); | |
1174 | return DOC_EINVAL; | |
1175 | } | |
1176 | ||
1177 | /* Don't allow a single write to cross a 512-byte block boundary */ | |
1178 | if (to + len > ((to | 0x1ff) + 1)) | |
1179 | len = ((to | 0x1ff) + 1) - to; | |
1180 | ||
1181 | /* The ECC will not be calculated correctly if less than 512 is written */ | |
1182 | if (len != 0x200 && eccbuf) | |
1183 | printf("ECC needs a full sector write (adr: %lx size %lx)\n", | |
1184 | (long) to, (long) len); | |
1185 | ||
1186 | /* printf("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ | |
1187 | ||
1188 | /* Find the chip which is to be used and select it */ | |
1189 | mychip = &this->chips[shr(to, this->chipshift)]; | |
1190 | ||
1191 | if (this->curfloor != mychip->floor) { | |
1192 | DoC_SelectFloor(this, mychip->floor); | |
1193 | DoC_SelectChip(this, mychip->chip); | |
1194 | } else if (this->curchip != mychip->chip) { | |
1195 | DoC_SelectChip(this, mychip->chip); | |
1196 | } | |
1197 | ||
1198 | this->curfloor = mychip->floor; | |
1199 | this->curchip = mychip->chip; | |
1200 | ||
1201 | /* Set device to main plane of flash */ | |
1202 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1203 | DoC_Command(this, | |
1204 | (!this->page256 | |
1205 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1206 | CDSN_CTRL_WP); | |
1207 | ||
1208 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1209 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); | |
1210 | ||
1211 | if (eccbuf) { | |
1212 | /* Prime the ECC engine */ | |
1213 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1214 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
1215 | } else { | |
1216 | /* disable the ECC engine */ | |
1217 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1218 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1219 | } | |
1220 | ||
1221 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1222 | if (this->page256 && to + len > (to | 0xff) + 1) { | |
1223 | len256 = (to | 0xff) + 1 - to; | |
1224 | DoC_WriteBuf(this, buf, len256); | |
1225 | ||
1226 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1227 | ||
1228 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1229 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1230 | ||
1231 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1232 | DoC_Delay(this, 2); | |
1233 | ||
1234 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1235 | puts ("Error programming flash\n"); | |
1236 | /* Error in programming */ | |
1237 | *retlen = 0; | |
1238 | return DOC_EIO; | |
1239 | } | |
1240 | ||
1241 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1242 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, | |
1243 | CDSN_CTRL_ECC_IO); | |
1244 | } | |
1245 | ||
1246 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1247 | ||
1248 | if (eccbuf) { | |
1249 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, | |
1250 | CDSNControl); | |
1251 | ||
1252 | if (DoC_is_Millennium(this)) { | |
1253 | WriteDOC(0, docptr, NOP); | |
1254 | WriteDOC(0, docptr, NOP); | |
1255 | WriteDOC(0, docptr, NOP); | |
1256 | } else { | |
1257 | WriteDOC_(0, docptr, this->ioreg); | |
1258 | WriteDOC_(0, docptr, this->ioreg); | |
1259 | WriteDOC_(0, docptr, this->ioreg); | |
1260 | } | |
1261 | ||
1262 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1263 | for (di = 0; di < 6; di++) { | |
1264 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); | |
1265 | } | |
1266 | ||
1267 | /* Reset the ECC engine */ | |
1268 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1269 | ||
1270 | #ifdef PSYCHO_DEBUG | |
1271 | printf | |
1272 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1273 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
1274 | eccbuf[4], eccbuf[5]); | |
1275 | #endif | |
1276 | } | |
1277 | ||
1278 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1279 | ||
1280 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1281 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1282 | ||
1283 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1284 | DoC_Delay(this, 2); | |
1285 | ||
1286 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1287 | puts ("Error programming flash\n"); | |
1288 | /* Error in programming */ | |
1289 | *retlen = 0; | |
1290 | return DOC_EIO; | |
1291 | } | |
1292 | ||
1293 | /* Let the caller know we completed it */ | |
1294 | *retlen = len; | |
1295 | ||
1296 | if (eccbuf) { | |
1297 | unsigned char x[8]; | |
1298 | size_t dummy; | |
1299 | int ret; | |
1300 | ||
1301 | /* Write the ECC data to flash */ | |
1302 | for (di=0; di<6; di++) | |
1303 | x[di] = eccbuf[di]; | |
1304 | ||
1305 | x[6]=0x55; | |
1306 | x[7]=0x55; | |
1307 | ||
1308 | ret = doc_write_oob(this, to, 8, &dummy, x); | |
1309 | return ret; | |
1310 | } | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1315 | size_t * retlen, u_char * buf) | |
1316 | { | |
1317 | int len256 = 0, ret; | |
1318 | unsigned long docptr; | |
1319 | struct Nand *mychip; | |
1320 | ||
1321 | docptr = this->virtadr; | |
1322 | ||
1323 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1324 | ||
1325 | if (this->curfloor != mychip->floor) { | |
1326 | DoC_SelectFloor(this, mychip->floor); | |
1327 | DoC_SelectChip(this, mychip->chip); | |
1328 | } else if (this->curchip != mychip->chip) { | |
1329 | DoC_SelectChip(this, mychip->chip); | |
1330 | } | |
1331 | this->curfloor = mychip->floor; | |
1332 | this->curchip = mychip->chip; | |
1333 | ||
1334 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1335 | /* page to maintain compatibility with doc_read_ecc. */ | |
1336 | if (this->page256) { | |
1337 | if (!(ofs & 0x8)) | |
1338 | ofs += 0x100; | |
1339 | else | |
1340 | ofs -= 0x8; | |
1341 | } | |
1342 | ||
1343 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1344 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); | |
1345 | ||
1346 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1347 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1348 | /* next OOB block, but it didn't work here. mf. */ | |
1349 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1350 | len256 = (ofs | 0x7) + 1 - ofs; | |
1351 | DoC_ReadBuf(this, buf, len256); | |
1352 | ||
1353 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1354 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), | |
1355 | CDSN_CTRL_WP, 0); | |
1356 | } | |
1357 | ||
1358 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1359 | ||
1360 | *retlen = len; | |
1361 | /* Reading the full OOB data drops us off of the end of the page, | |
8bde7f77 WD |
1362 | * causing the flash device to go into busy mode, so we need |
1363 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ | |
c609719b WD |
1364 | |
1365 | ret = DoC_WaitReady(this); | |
1366 | ||
1367 | return ret; | |
1368 | ||
1369 | } | |
1370 | ||
1371 | int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1372 | size_t * retlen, const u_char * buf) | |
1373 | { | |
1374 | int len256 = 0; | |
1375 | unsigned long docptr = this->virtadr; | |
1376 | struct Nand *mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1377 | volatile int dummy; | |
1378 | ||
1379 | #ifdef PSYCHO_DEBUG | |
1380 | printf("doc_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n", | |
1381 | (long)ofs, len, buf[0], buf[1], buf[2], buf[3], | |
1382 | buf[8], buf[9], buf[14],buf[15]); | |
1383 | #endif | |
1384 | ||
1385 | /* Find the chip which is to be used and select it */ | |
1386 | if (this->curfloor != mychip->floor) { | |
1387 | DoC_SelectFloor(this, mychip->floor); | |
1388 | DoC_SelectChip(this, mychip->chip); | |
1389 | } else if (this->curchip != mychip->chip) { | |
1390 | DoC_SelectChip(this, mychip->chip); | |
1391 | } | |
1392 | this->curfloor = mychip->floor; | |
1393 | this->curchip = mychip->chip; | |
1394 | ||
1395 | /* disable the ECC engine */ | |
1396 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); | |
1397 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); | |
1398 | ||
1399 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
1400 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1401 | ||
1402 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ | |
1403 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1404 | ||
1405 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1406 | /* page to maintain compatibility with doc_read_ecc. */ | |
1407 | if (this->page256) { | |
1408 | if (!(ofs & 0x8)) | |
1409 | ofs += 0x100; | |
1410 | else | |
1411 | ofs -= 0x8; | |
1412 | } | |
1413 | ||
1414 | /* issue the Serial Data In command to initial the Page Program process */ | |
1415 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1416 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); | |
1417 | ||
1418 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1419 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1420 | /* next OOB block, but it didn't work here. mf. */ | |
1421 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1422 | len256 = (ofs | 0x7) + 1 - ofs; | |
1423 | DoC_WriteBuf(this, buf, len256); | |
1424 | ||
1425 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1426 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1427 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1428 | ||
1429 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1430 | DoC_Delay(this, 2); | |
1431 | ||
1432 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1433 | puts ("Error programming oob data\n"); | |
1434 | /* There was an error */ | |
1435 | *retlen = 0; | |
1436 | return DOC_EIO; | |
1437 | } | |
1438 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1439 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); | |
1440 | } | |
1441 | ||
1442 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1443 | ||
1444 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1445 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1446 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1447 | ||
1448 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1449 | DoC_Delay(this, 2); | |
1450 | ||
1451 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1452 | puts ("Error programming oob data\n"); | |
1453 | /* There was an error */ | |
1454 | *retlen = 0; | |
1455 | return DOC_EIO; | |
1456 | } | |
1457 | ||
1458 | *retlen = len; | |
1459 | return 0; | |
1460 | ||
1461 | } | |
1462 | ||
1463 | int doc_erase(struct DiskOnChip* this, loff_t ofs, size_t len) | |
1464 | { | |
1465 | volatile int dummy; | |
1466 | unsigned long docptr; | |
1467 | struct Nand *mychip; | |
1468 | ||
1469 | if (ofs & (this->erasesize-1) || len & (this->erasesize-1)) { | |
1470 | puts ("Offset and size must be sector aligned\n"); | |
1471 | return DOC_EINVAL; | |
1472 | } | |
1473 | ||
1474 | docptr = this->virtadr; | |
1475 | ||
1476 | /* FIXME: Do this in the background. Use timers or schedule_task() */ | |
1477 | while(len) { | |
1478 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1479 | ||
1480 | if (this->curfloor != mychip->floor) { | |
1481 | DoC_SelectFloor(this, mychip->floor); | |
1482 | DoC_SelectChip(this, mychip->chip); | |
1483 | } else if (this->curchip != mychip->chip) { | |
1484 | DoC_SelectChip(this, mychip->chip); | |
1485 | } | |
1486 | this->curfloor = mychip->floor; | |
1487 | this->curchip = mychip->chip; | |
1488 | ||
1489 | DoC_Command(this, NAND_CMD_ERASE1, 0); | |
1490 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); | |
1491 | DoC_Command(this, NAND_CMD_ERASE2, 0); | |
1492 | ||
1493 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1494 | ||
1495 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1496 | DoC_Delay(this, 2); | |
1497 | ||
1498 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1499 | printf("Error erasing at 0x%lx\n", (long)ofs); | |
1500 | /* There was an error */ | |
1501 | goto callback; | |
1502 | } | |
1503 | ofs += this->erasesize; | |
1504 | len -= this->erasesize; | |
1505 | } | |
1506 | ||
1507 | callback: | |
1508 | return 0; | |
1509 | } | |
1510 | ||
1511 | static inline int doccheck(unsigned long potential, unsigned long physadr) | |
1512 | { | |
1513 | unsigned long window=potential; | |
1514 | unsigned char tmp, ChipID; | |
1515 | #ifndef DOC_PASSIVE_PROBE | |
1516 | unsigned char tmp2; | |
1517 | #endif | |
1518 | ||
1519 | /* Routine copied from the Linux DOC driver */ | |
1520 | ||
1521 | #ifdef CFG_DOCPROBE_55AA | |
1522 | /* Check for 0x55 0xAA signature at beginning of window, | |
1523 | this is no longer true once we remove the IPL (for Millennium */ | |
1524 | if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa) | |
1525 | return 0; | |
1526 | #endif /* CFG_DOCPROBE_55AA */ | |
1527 | ||
1528 | #ifndef DOC_PASSIVE_PROBE | |
1529 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1530 | * bootup procedure will put the device into reset mode, and | |
1531 | * it's not possible to talk to it without actually writing | |
1532 | * to the DOCControl register. So we store the current contents | |
1533 | * of the DOCControl register's location, in case we later decide | |
1534 | * that it's not a DiskOnChip, and want to put it back how we | |
1535 | * found it. | |
1536 | */ | |
1537 | tmp2 = ReadDOC(window, DOCControl); | |
1538 | ||
1539 | /* Reset the DiskOnChip ASIC */ | |
1540 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1541 | window, DOCControl); | |
1542 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1543 | window, DOCControl); | |
1544 | ||
1545 | /* Enable the DiskOnChip ASIC */ | |
1546 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1547 | window, DOCControl); | |
1548 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1549 | window, DOCControl); | |
1550 | #endif /* !DOC_PASSIVE_PROBE */ | |
1551 | ||
1552 | ChipID = ReadDOC(window, ChipID); | |
1553 | ||
1554 | switch (ChipID) { | |
1555 | case DOC_ChipID_Doc2k: | |
1556 | /* Check the TOGGLE bit in the ECC register */ | |
1557 | tmp = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; | |
1558 | if ((ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT) != tmp) | |
1559 | return ChipID; | |
1560 | break; | |
1561 | ||
1562 | case DOC_ChipID_DocMil: | |
1563 | /* Check the TOGGLE bit in the ECC register */ | |
1564 | tmp = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; | |
1565 | if ((ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT) != tmp) | |
1566 | return ChipID; | |
1567 | break; | |
1568 | ||
1569 | default: | |
1570 | #ifndef CFG_DOCPROBE_55AA | |
1571 | /* | |
1572 | * if the ID isn't the DoC2000 or DoCMillenium ID, so we can assume | |
1573 | * the DOC is missing | |
1574 | */ | |
1575 | # if 0 | |
1576 | printf("Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n", | |
1577 | ChipID, physadr); | |
1578 | # endif | |
1579 | #endif | |
1580 | #ifndef DOC_PASSIVE_PROBE | |
1581 | /* Put back the contents of the DOCControl register, in case it's not | |
1582 | * actually a DiskOnChip. | |
1583 | */ | |
1584 | WriteDOC(tmp2, window, DOCControl); | |
1585 | #endif | |
1586 | return 0; | |
1587 | } | |
1588 | ||
1589 | puts ("DiskOnChip failed TOGGLE test, dropping.\n"); | |
1590 | ||
1591 | #ifndef DOC_PASSIVE_PROBE | |
1592 | /* Put back the contents of the DOCControl register: it's not a DiskOnChip */ | |
1593 | WriteDOC(tmp2, window, DOCControl); | |
1594 | #endif | |
1595 | return 0; | |
1596 | } | |
1597 | ||
1598 | void doc_probe(unsigned long physadr) | |
1599 | { | |
1600 | struct DiskOnChip *this = NULL; | |
1601 | int i=0, ChipID; | |
1602 | ||
1603 | if ((ChipID = doccheck(physadr, physadr))) { | |
1604 | ||
1605 | for (i=0; i<CFG_MAX_DOC_DEVICE; i++) { | |
1606 | if (doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) { | |
1607 | this = doc_dev_desc + i; | |
1608 | break; | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | if (!this) { | |
1613 | puts ("Cannot allocate memory for data structures.\n"); | |
1614 | return; | |
1615 | } | |
1616 | ||
1617 | if (curr_device == -1) | |
1618 | curr_device = i; | |
1619 | ||
1620 | memset((char *)this, 0, sizeof(struct DiskOnChip)); | |
1621 | ||
1622 | this->virtadr = physadr; | |
1623 | this->physadr = physadr; | |
1624 | this->ChipID = ChipID; | |
1625 | ||
1626 | DoC2k_init(this); | |
1627 | } else { | |
1628 | puts ("No DiskOnChip found\n"); | |
1629 | } | |
1630 | } |