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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 | 16 | |
cfa460ad | 17 | #if 0 |
c609719b WD |
18 | #ifdef CFG_DOC_SUPPORT_2000 |
19 | #define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) | |
20 | #else | |
21 | #define DoC_is_2000(doc) (0) | |
22 | #endif | |
23 | ||
24 | #ifdef CFG_DOC_SUPPORT_MILLENNIUM | |
25 | #define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) | |
26 | #else | |
27 | #define DoC_is_Millennium(doc) (0) | |
28 | #endif | |
29 | ||
30 | /* CFG_DOC_PASSIVE_PROBE: | |
31 | In order to ensure that the BIOS checksum is correct at boot time, and | |
32 | hence that the onboard BIOS extension gets executed, the DiskOnChip | |
33 | goes into reset mode when it is read sequentially: all registers | |
34 | return 0xff until the chip is woken up again by writing to the | |
35 | DOCControl register. | |
36 | ||
37 | Unfortunately, this means that the probe for the DiskOnChip is unsafe, | |
38 | because one of the first things it does is write to where it thinks | |
39 | the DOCControl register should be - which may well be shared memory | |
40 | for another device. I've had machines which lock up when this is | |
41 | attempted. Hence the possibility to do a passive probe, which will fail | |
42 | to detect a chip in reset mode, but is at least guaranteed not to lock | |
43 | the machine. | |
44 | ||
45 | If you have this problem, uncomment the following line: | |
46 | #define CFG_DOC_PASSIVE_PROBE | |
47 | */ | |
48 | ||
49 | #undef DOC_DEBUG | |
50 | #undef ECC_DEBUG | |
51 | #undef PSYCHO_DEBUG | |
52 | #undef NFTL_DEBUG | |
53 | ||
54 | static struct DiskOnChip doc_dev_desc[CFG_MAX_DOC_DEVICE]; | |
55 | ||
56 | /* Current DOC Device */ | |
57 | static int curr_device = -1; | |
58 | ||
2fc000d7 MB |
59 | /* Supported NAND flash devices */ |
60 | static struct nand_flash_dev nand_flash_ids[] = { | |
61 | {"Toshiba TC5816BDC", NAND_MFR_TOSHIBA, 0x64, 21, 1, 2, 0x1000, 0}, | |
62 | {"Toshiba TC5832DC", NAND_MFR_TOSHIBA, 0x6b, 22, 0, 2, 0x2000, 0}, | |
63 | {"Toshiba TH58V128DC", NAND_MFR_TOSHIBA, 0x73, 24, 0, 2, 0x4000, 0}, | |
64 | {"Toshiba TC58256FT/DC", NAND_MFR_TOSHIBA, 0x75, 25, 0, 2, 0x4000, 0}, | |
65 | {"Toshiba TH58512FT", NAND_MFR_TOSHIBA, 0x76, 26, 0, 3, 0x4000, 0}, | |
66 | {"Toshiba TC58V32DC", NAND_MFR_TOSHIBA, 0xe5, 22, 0, 2, 0x2000, 0}, | |
67 | {"Toshiba TC58V64AFT/DC", NAND_MFR_TOSHIBA, 0xe6, 23, 0, 2, 0x2000, 0}, | |
68 | {"Toshiba TC58V16BDC", NAND_MFR_TOSHIBA, 0xea, 21, 1, 2, 0x1000, 0}, | |
69 | {"Toshiba TH58100FT", NAND_MFR_TOSHIBA, 0x79, 27, 0, 3, 0x4000, 0}, | |
70 | {"Samsung KM29N16000", NAND_MFR_SAMSUNG, 0x64, 21, 1, 2, 0x1000, 0}, | |
71 | {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0x6b, 22, 0, 2, 0x2000, 0}, | |
72 | {"Samsung KM29U128T", NAND_MFR_SAMSUNG, 0x73, 24, 0, 2, 0x4000, 0}, | |
73 | {"Samsung KM29U256T", NAND_MFR_SAMSUNG, 0x75, 25, 0, 2, 0x4000, 0}, | |
74 | {"Samsung unknown 64Mb", NAND_MFR_SAMSUNG, 0x76, 26, 0, 3, 0x4000, 0}, | |
75 | {"Samsung KM29W32000", NAND_MFR_SAMSUNG, 0xe3, 22, 0, 2, 0x2000, 0}, | |
76 | {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0xe5, 22, 0, 2, 0x2000, 0}, | |
77 | {"Samsung KM29U64000", NAND_MFR_SAMSUNG, 0xe6, 23, 0, 2, 0x2000, 0}, | |
78 | {"Samsung KM29W16000", NAND_MFR_SAMSUNG, 0xea, 21, 1, 2, 0x1000, 0}, | |
79 | {"Samsung K9F5616Q0C", NAND_MFR_SAMSUNG, 0x45, 25, 0, 2, 0x4000, 1}, | |
80 | {"Samsung K9K1216Q0C", NAND_MFR_SAMSUNG, 0x46, 26, 0, 3, 0x4000, 1}, | |
81 | {"Samsung K9F1G08U0M", NAND_MFR_SAMSUNG, 0xf1, 27, 0, 2, 0, 0}, | |
82 | {NULL,} | |
83 | }; | |
84 | ||
c609719b WD |
85 | /* ------------------------------------------------------------------------- */ |
86 | ||
87 | int do_doc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
88 | { | |
89 | int rcode = 0; | |
90 | ||
91 | switch (argc) { | |
92 | case 0: | |
93 | case 1: | |
94 | printf ("Usage:\n%s\n", cmdtp->usage); | |
95 | return 1; | |
96 | case 2: | |
8bde7f77 | 97 | if (strcmp(argv[1],"info") == 0) { |
c609719b WD |
98 | int i; |
99 | ||
100 | putc ('\n'); | |
101 | ||
102 | for (i=0; i<CFG_MAX_DOC_DEVICE; ++i) { | |
103 | if(doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) | |
104 | continue; /* list only known devices */ | |
105 | printf ("Device %d: ", i); | |
106 | doc_print(&doc_dev_desc[i]); | |
107 | } | |
108 | return 0; | |
109 | ||
110 | } else if (strcmp(argv[1],"device") == 0) { | |
111 | if ((curr_device < 0) || (curr_device >= CFG_MAX_DOC_DEVICE)) { | |
112 | puts ("\nno devices available\n"); | |
113 | return 1; | |
114 | } | |
115 | printf ("\nDevice %d: ", curr_device); | |
116 | doc_print(&doc_dev_desc[curr_device]); | |
117 | return 0; | |
118 | } | |
119 | printf ("Usage:\n%s\n", cmdtp->usage); | |
120 | return 1; | |
121 | case 3: | |
122 | if (strcmp(argv[1],"device") == 0) { | |
123 | int dev = (int)simple_strtoul(argv[2], NULL, 10); | |
124 | ||
125 | printf ("\nDevice %d: ", dev); | |
126 | if (dev >= CFG_MAX_DOC_DEVICE) { | |
127 | puts ("unknown device\n"); | |
128 | return 1; | |
129 | } | |
130 | doc_print(&doc_dev_desc[dev]); | |
131 | /*doc_print (dev);*/ | |
132 | ||
133 | if (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN) { | |
134 | return 1; | |
135 | } | |
136 | ||
137 | curr_device = dev; | |
138 | ||
139 | puts ("... is now current device\n"); | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | printf ("Usage:\n%s\n", cmdtp->usage); | |
145 | return 1; | |
146 | default: | |
147 | /* at least 4 args */ | |
148 | ||
149 | if (strcmp(argv[1],"read") == 0 || strcmp(argv[1],"write") == 0) { | |
150 | ulong addr = simple_strtoul(argv[2], NULL, 16); | |
151 | ulong off = simple_strtoul(argv[3], NULL, 16); | |
152 | ulong size = simple_strtoul(argv[4], NULL, 16); | |
153 | int cmd = (strcmp(argv[1],"read") == 0); | |
154 | int ret, total; | |
155 | ||
156 | printf ("\nDOC %s: device %d offset %ld, size %ld ... ", | |
157 | cmd ? "read" : "write", curr_device, off, size); | |
158 | ||
159 | ret = doc_rw(doc_dev_desc + curr_device, cmd, off, size, | |
77ddac94 | 160 | (size_t *)&total, (u_char*)addr); |
c609719b WD |
161 | |
162 | printf ("%d bytes %s: %s\n", total, cmd ? "read" : "write", | |
163 | ret ? "ERROR" : "OK"); | |
164 | ||
165 | return ret; | |
166 | } else if (strcmp(argv[1],"erase") == 0) { | |
167 | ulong off = simple_strtoul(argv[2], NULL, 16); | |
168 | ulong size = simple_strtoul(argv[3], NULL, 16); | |
169 | int ret; | |
170 | ||
171 | printf ("\nDOC erase: device %d offset %ld, size %ld ... ", | |
172 | curr_device, off, size); | |
173 | ||
174 | ret = doc_erase (doc_dev_desc + curr_device, off, size); | |
175 | ||
176 | printf("%s\n", ret ? "ERROR" : "OK"); | |
177 | ||
178 | return ret; | |
179 | } else { | |
180 | printf ("Usage:\n%s\n", cmdtp->usage); | |
181 | rcode = 1; | |
182 | } | |
183 | ||
184 | return rcode; | |
185 | } | |
186 | } | |
0d498393 WD |
187 | U_BOOT_CMD( |
188 | doc, 5, 1, do_doc, | |
8bde7f77 WD |
189 | "doc - Disk-On-Chip sub-system\n", |
190 | "info - show available DOC devices\n" | |
191 | "doc device [dev] - show or set current device\n" | |
192 | "doc read addr off size\n" | |
193 | "doc write addr off size - read/write `size'" | |
194 | " bytes starting at offset `off'\n" | |
195 | " to/from memory address `addr'\n" | |
196 | "doc erase off size - erase `size' bytes of DOC from offset `off'\n" | |
197 | ); | |
c609719b WD |
198 | |
199 | int do_docboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
200 | { | |
201 | char *boot_device = NULL; | |
202 | char *ep; | |
203 | int dev; | |
204 | ulong cnt; | |
205 | ulong addr; | |
206 | ulong offset = 0; | |
207 | image_header_t *hdr; | |
208 | int rcode = 0; | |
09475f75 | 209 | #if defined(CONFIG_FIT) |
3bab76a2 | 210 | const void *fit_hdr = NULL; |
09475f75 | 211 | #endif |
c609719b | 212 | |
fad63407 | 213 | show_boot_progress (34); |
c609719b WD |
214 | switch (argc) { |
215 | case 1: | |
216 | addr = CFG_LOAD_ADDR; | |
217 | boot_device = getenv ("bootdevice"); | |
218 | break; | |
219 | case 2: | |
220 | addr = simple_strtoul(argv[1], NULL, 16); | |
221 | boot_device = getenv ("bootdevice"); | |
222 | break; | |
223 | case 3: | |
224 | addr = simple_strtoul(argv[1], NULL, 16); | |
225 | boot_device = argv[2]; | |
226 | break; | |
227 | case 4: | |
228 | addr = simple_strtoul(argv[1], NULL, 16); | |
229 | boot_device = argv[2]; | |
230 | offset = simple_strtoul(argv[3], NULL, 16); | |
231 | break; | |
232 | default: | |
233 | printf ("Usage:\n%s\n", cmdtp->usage); | |
fad63407 | 234 | show_boot_progress (-35); |
c609719b WD |
235 | return 1; |
236 | } | |
237 | ||
fad63407 | 238 | show_boot_progress (35); |
c609719b WD |
239 | if (!boot_device) { |
240 | puts ("\n** No boot device **\n"); | |
fad63407 | 241 | show_boot_progress (-36); |
c609719b WD |
242 | return 1; |
243 | } | |
fad63407 | 244 | show_boot_progress (36); |
c609719b WD |
245 | |
246 | dev = simple_strtoul(boot_device, &ep, 16); | |
247 | ||
248 | if ((dev >= CFG_MAX_DOC_DEVICE) || | |
249 | (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN)) { | |
250 | printf ("\n** Device %d not available\n", dev); | |
fad63407 | 251 | show_boot_progress (-37); |
c609719b WD |
252 | return 1; |
253 | } | |
fad63407 | 254 | show_boot_progress (37); |
c609719b WD |
255 | |
256 | printf ("\nLoading from device %d: %s at 0x%lX (offset 0x%lX)\n", | |
257 | dev, doc_dev_desc[dev].name, doc_dev_desc[dev].physadr, | |
258 | offset); | |
259 | ||
260 | if (doc_rw (doc_dev_desc + dev, 1, offset, | |
261 | SECTORSIZE, NULL, (u_char *)addr)) { | |
262 | printf ("** Read error on %d\n", dev); | |
fad63407 | 263 | show_boot_progress (-38); |
c609719b WD |
264 | return 1; |
265 | } | |
fad63407 | 266 | show_boot_progress (38); |
c609719b | 267 | |
9a4daad0 | 268 | switch (genimg_get_format ((void *)addr)) { |
d5934ad7 MB |
269 | case IMAGE_FORMAT_LEGACY: |
270 | hdr = (image_header_t *)addr; | |
c609719b | 271 | |
09475f75 | 272 | image_print_contents (hdr); |
c609719b | 273 | |
09475f75 | 274 | cnt = image_get_image_size (hdr); |
d5934ad7 MB |
275 | break; |
276 | #if defined(CONFIG_FIT) | |
277 | case IMAGE_FORMAT_FIT: | |
09475f75 | 278 | fit_hdr = (const void *)addr; |
09475f75 MB |
279 | puts ("Fit image detected...\n"); |
280 | ||
281 | cnt = fit_get_size (fit_hdr); | |
282 | break; | |
d5934ad7 MB |
283 | #endif |
284 | default: | |
09475f75 | 285 | show_boot_progress (-39); |
d5934ad7 | 286 | puts ("** Unknown image type\n"); |
c609719b WD |
287 | return 1; |
288 | } | |
fad63407 | 289 | show_boot_progress (39); |
c609719b | 290 | |
09475f75 | 291 | cnt -= SECTORSIZE; |
c609719b WD |
292 | if (doc_rw (doc_dev_desc + dev, 1, offset + SECTORSIZE, cnt, |
293 | NULL, (u_char *)(addr+SECTORSIZE))) { | |
294 | printf ("** Read error on %d\n", dev); | |
fad63407 | 295 | show_boot_progress (-40); |
c609719b WD |
296 | return 1; |
297 | } | |
fad63407 | 298 | show_boot_progress (40); |
c609719b | 299 | |
09475f75 MB |
300 | #if defined(CONFIG_FIT) |
301 | /* This cannot be done earlier, we need complete FIT image in RAM first */ | |
3bab76a2 MB |
302 | if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) { |
303 | if (!fit_check_format (fit_hdr)) { | |
304 | show_boot_progress (-130); | |
305 | puts ("** Bad FIT image format\n"); | |
306 | return 1; | |
307 | } | |
308 | show_boot_progress (131); | |
309 | fit_print_contents (fit_hdr); | |
310 | } | |
09475f75 MB |
311 | #endif |
312 | ||
c609719b WD |
313 | /* Loading ok, update default load address */ |
314 | ||
315 | load_addr = addr; | |
316 | ||
317 | /* Check if we should attempt an auto-start */ | |
318 | if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { | |
319 | char *local_args[2]; | |
320 | extern int do_bootm (cmd_tbl_t *, int, int, char *[]); | |
321 | ||
322 | local_args[0] = argv[0]; | |
323 | local_args[1] = NULL; | |
324 | ||
325 | printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); | |
326 | ||
327 | do_bootm (cmdtp, 0, 1, local_args); | |
328 | rcode = 1; | |
329 | } | |
330 | return rcode; | |
331 | } | |
332 | ||
0d498393 WD |
333 | U_BOOT_CMD( |
334 | docboot, 4, 1, do_docboot, | |
8bde7f77 WD |
335 | "docboot - boot from DOC device\n", |
336 | "loadAddr dev\n" | |
337 | ); | |
338 | ||
c609719b WD |
339 | int doc_rw (struct DiskOnChip* this, int cmd, |
340 | loff_t from, size_t len, | |
341 | size_t * retlen, u_char * buf) | |
342 | { | |
343 | int noecc, ret = 0, n, total = 0; | |
344 | char eccbuf[6]; | |
345 | ||
346 | while(len) { | |
347 | /* The ECC will not be calculated correctly if | |
348 | less than 512 is written or read */ | |
349 | noecc = (from != (from | 0x1ff) + 1) || (len < 0x200); | |
350 | ||
351 | if (cmd) | |
352 | ret = doc_read_ecc(this, from, len, | |
77ddac94 WD |
353 | (size_t *)&n, (u_char*)buf, |
354 | noecc ? (uchar *)NULL : (uchar *)eccbuf); | |
c609719b WD |
355 | else |
356 | ret = doc_write_ecc(this, from, len, | |
77ddac94 WD |
357 | (size_t *)&n, (u_char*)buf, |
358 | noecc ? (uchar *)NULL : (uchar *)eccbuf); | |
c609719b WD |
359 | |
360 | if (ret) | |
361 | break; | |
362 | ||
363 | from += n; | |
364 | buf += n; | |
365 | total += n; | |
366 | len -= n; | |
367 | } | |
368 | ||
369 | if (retlen) | |
370 | *retlen = total; | |
371 | ||
372 | return ret; | |
373 | } | |
374 | ||
375 | void doc_print(struct DiskOnChip *this) { | |
376 | printf("%s at 0x%lX,\n" | |
377 | "\t %d chip%s %s, size %d MB, \n" | |
378 | "\t total size %ld MB, sector size %ld kB\n", | |
379 | this->name, this->physadr, this->numchips, | |
380 | this->numchips>1 ? "s" : "", this->chips_name, | |
381 | 1 << (this->chipshift - 20), | |
382 | this->totlen >> 20, this->erasesize >> 10); | |
383 | ||
384 | if (this->nftl_found) { | |
385 | struct NFTLrecord *nftl = &this->nftl; | |
386 | unsigned long bin_size, flash_size; | |
387 | ||
388 | bin_size = nftl->nb_boot_blocks * this->erasesize; | |
389 | flash_size = (nftl->nb_blocks - nftl->nb_boot_blocks) * this->erasesize; | |
390 | ||
391 | printf("\t NFTL boot record:\n" | |
392 | "\t Binary partition: size %ld%s\n" | |
393 | "\t Flash disk partition: size %ld%s, offset 0x%lx\n", | |
394 | bin_size > (1 << 20) ? bin_size >> 20 : bin_size >> 10, | |
395 | bin_size > (1 << 20) ? "MB" : "kB", | |
396 | flash_size > (1 << 20) ? flash_size >> 20 : flash_size >> 10, | |
397 | flash_size > (1 << 20) ? "MB" : "kB", bin_size); | |
398 | } else { | |
399 | puts ("\t No NFTL boot record found.\n"); | |
400 | } | |
401 | } | |
402 | ||
403 | /* ------------------------------------------------------------------------- */ | |
404 | ||
405 | /* This function is needed to avoid calls of the __ashrdi3 function. */ | |
406 | static int shr(int val, int shift) { | |
407 | return val >> shift; | |
408 | } | |
409 | ||
410 | /* Perform the required delay cycles by reading from the appropriate register */ | |
411 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) | |
412 | { | |
413 | volatile char dummy; | |
414 | int i; | |
415 | ||
416 | for (i = 0; i < cycles; i++) { | |
417 | if (DoC_is_Millennium(doc)) | |
418 | dummy = ReadDOC(doc->virtadr, NOP); | |
419 | else | |
420 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
421 | } | |
422 | ||
423 | } | |
424 | ||
425 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
426 | static int _DoC_WaitReady(struct DiskOnChip *doc) | |
427 | { | |
428 | unsigned long docptr = doc->virtadr; | |
429 | unsigned long start = get_timer(0); | |
430 | ||
431 | #ifdef PSYCHO_DEBUG | |
432 | puts ("_DoC_WaitReady called for out-of-line wait\n"); | |
433 | #endif | |
434 | ||
435 | /* Out-of-line routine to wait for chip response */ | |
436 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
437 | #ifdef CFG_DOC_SHORT_TIMEOUT | |
438 | /* it seems that after a certain time the DoC deasserts | |
439 | * the CDSN_CTRL_FR_B although it is not ready... | |
440 | * using a short timout solve this (timer increments every ms) */ | |
441 | if (get_timer(start) > 10) { | |
442 | return DOC_ETIMEOUT; | |
443 | } | |
444 | #else | |
445 | if (get_timer(start) > 10 * 1000) { | |
446 | puts ("_DoC_WaitReady timed out.\n"); | |
447 | return DOC_ETIMEOUT; | |
448 | } | |
449 | #endif | |
450 | udelay(1); | |
8bde7f77 | 451 | } |
c609719b WD |
452 | |
453 | return 0; | |
454 | } | |
455 | ||
456 | static int DoC_WaitReady(struct DiskOnChip *doc) | |
457 | { | |
458 | unsigned long docptr = doc->virtadr; | |
459 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
460 | int ret = 0; | |
461 | ||
462 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl | |
463 | see Software Requirement 11.4 item 2. */ | |
464 | DoC_Delay(doc, 4); | |
465 | ||
466 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
467 | /* Call the out-of-line routine to wait */ | |
468 | ret = _DoC_WaitReady(doc); | |
469 | ||
470 | /* issue 2 read from NOP register after reading from CDSNControl register | |
471 | see Software Requirement 11.4 item 2. */ | |
472 | DoC_Delay(doc, 2); | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
477 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to | |
478 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
479 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
480 | ||
481 | static inline int DoC_Command(struct DiskOnChip *doc, unsigned char command, | |
482 | unsigned char xtraflags) | |
483 | { | |
484 | unsigned long docptr = doc->virtadr; | |
485 | ||
486 | if (DoC_is_2000(doc)) | |
487 | xtraflags |= CDSN_CTRL_FLASH_IO; | |
488 | ||
489 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ | |
490 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); | |
491 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
492 | ||
493 | if (DoC_is_Millennium(doc)) | |
494 | WriteDOC(command, docptr, CDSNSlowIO); | |
495 | ||
496 | /* Send the command */ | |
497 | WriteDOC_(command, docptr, doc->ioreg); | |
498 | ||
499 | /* Lower the CLE line */ | |
500 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); | |
501 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
502 | ||
503 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ | |
504 | return DoC_WaitReady(doc); | |
505 | } | |
506 | ||
507 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to | |
508 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
509 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
510 | ||
511 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, | |
512 | unsigned char xtraflags1, unsigned char xtraflags2) | |
513 | { | |
514 | unsigned long docptr; | |
515 | int i; | |
516 | ||
517 | docptr = doc->virtadr; | |
518 | ||
519 | if (DoC_is_2000(doc)) | |
520 | xtraflags1 |= CDSN_CTRL_FLASH_IO; | |
521 | ||
522 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ | |
523 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); | |
524 | ||
525 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
526 | ||
527 | /* Send the address */ | |
528 | /* Devices with 256-byte page are addressed as: | |
529 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) | |
530 | * there is no device on the market with page256 | |
531 | and more than 24 bits. | |
532 | Devices with 512-byte page are addressed as: | |
533 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) | |
534 | * 25-31 is sent only if the chip support it. | |
535 | * bit 8 changes the read command to be sent | |
536 | (NAND_CMD_READ0 or NAND_CMD_READ1). | |
537 | */ | |
538 | ||
539 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { | |
540 | if (DoC_is_Millennium(doc)) | |
541 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
542 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
543 | } | |
544 | ||
545 | if (doc->page256) { | |
546 | ofs = ofs >> 8; | |
547 | } else { | |
548 | ofs = ofs >> 9; | |
549 | } | |
550 | ||
551 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { | |
552 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { | |
553 | if (DoC_is_Millennium(doc)) | |
554 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
555 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
556 | } | |
557 | } | |
558 | ||
559 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ | |
560 | ||
561 | /* FIXME: The SlowIO's for millennium could be replaced by | |
562 | a single WritePipeTerm here. mf. */ | |
563 | ||
564 | /* Lower the ALE line */ | |
565 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, | |
566 | CDSNControl); | |
567 | ||
568 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
569 | ||
570 | /* Wait for the chip to respond - Software requirement 11.4.1 */ | |
571 | return DoC_WaitReady(doc); | |
572 | } | |
573 | ||
7152b1d0 | 574 | /* Read a buffer from DoC, taking care of Millennium oddities */ |
c609719b WD |
575 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) |
576 | { | |
577 | volatile int dummy; | |
578 | int modulus = 0xffff; | |
579 | unsigned long docptr; | |
580 | int i; | |
581 | ||
582 | docptr = doc->virtadr; | |
583 | ||
584 | if (len <= 0) | |
585 | return; | |
586 | ||
587 | if (DoC_is_Millennium(doc)) { | |
588 | /* Read the data via the internal pipeline through CDSN IO register, | |
589 | see Pipelined Read Operations 11.3 */ | |
590 | dummy = ReadDOC(docptr, ReadPipeInit); | |
591 | ||
592 | /* Millennium should use the LastDataRead register - Pipeline Reads */ | |
593 | len--; | |
594 | ||
595 | /* This is needed for correctly ECC calculation */ | |
596 | modulus = 0xff; | |
597 | } | |
598 | ||
599 | for (i = 0; i < len; i++) | |
600 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); | |
601 | ||
602 | if (DoC_is_Millennium(doc)) { | |
603 | buf[i] = ReadDOC(docptr, LastDataRead); | |
604 | } | |
605 | } | |
606 | ||
7152b1d0 | 607 | /* Write a buffer to DoC, taking care of Millennium oddities */ |
c609719b WD |
608 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) |
609 | { | |
610 | unsigned long docptr; | |
611 | int i; | |
612 | ||
613 | docptr = doc->virtadr; | |
614 | ||
615 | if (len <= 0) | |
616 | return; | |
617 | ||
618 | for (i = 0; i < len; i++) | |
619 | WriteDOC_(buf[i], docptr, doc->ioreg + i); | |
620 | ||
621 | if (DoC_is_Millennium(doc)) { | |
622 | WriteDOC(0x00, docptr, WritePipeTerm); | |
623 | } | |
624 | } | |
625 | ||
626 | ||
627 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
628 | ||
629 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) | |
630 | { | |
631 | unsigned long docptr = doc->virtadr; | |
632 | ||
633 | /* Software requirement 11.4.4 before writing DeviceSelect */ | |
634 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ | |
635 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); | |
636 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
637 | ||
638 | /* Select the individual flash chip requested */ | |
639 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
640 | DoC_Delay(doc, 4); | |
641 | ||
642 | /* Reassert the CE line */ | |
643 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, | |
644 | CDSNControl); | |
645 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
646 | ||
647 | /* Wait for it to be ready */ | |
648 | return DoC_WaitReady(doc); | |
649 | } | |
650 | ||
651 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
652 | ||
653 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) | |
654 | { | |
655 | unsigned long docptr = doc->virtadr; | |
656 | ||
657 | /* Select the floor (bank) of chips required */ | |
658 | WriteDOC(floor, docptr, FloorSelect); | |
659 | ||
660 | /* Wait for the chip to be ready */ | |
661 | return DoC_WaitReady(doc); | |
662 | } | |
663 | ||
664 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
665 | ||
666 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
667 | { | |
668 | int mfr, id, i; | |
669 | volatile char dummy; | |
670 | ||
671 | /* Page in the required floor/chip */ | |
672 | DoC_SelectFloor(doc, floor); | |
673 | DoC_SelectChip(doc, chip); | |
674 | ||
675 | /* Reset the chip */ | |
676 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { | |
677 | #ifdef DOC_DEBUG | |
678 | printf("DoC_Command (reset) for %d,%d returned true\n", | |
679 | floor, chip); | |
680 | #endif | |
681 | return 0; | |
682 | } | |
683 | ||
684 | ||
685 | /* Read the NAND chip ID: 1. Send ReadID command */ | |
686 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { | |
687 | #ifdef DOC_DEBUG | |
688 | printf("DoC_Command (ReadID) for %d,%d returned true\n", | |
689 | floor, chip); | |
690 | #endif | |
691 | return 0; | |
692 | } | |
693 | ||
694 | /* Read the NAND chip ID: 2. Send address byte zero */ | |
695 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); | |
696 | ||
697 | /* Read the manufacturer and device id codes from the device */ | |
698 | ||
699 | /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ | |
700 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
701 | DoC_Delay(doc, 2); | |
702 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); | |
703 | ||
704 | /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ | |
705 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
706 | DoC_Delay(doc, 2); | |
707 | id = ReadDOC_(doc->virtadr, doc->ioreg); | |
708 | ||
709 | /* No response - return failure */ | |
710 | if (mfr == 0xff || mfr == 0) | |
711 | return 0; | |
712 | ||
713 | /* Check it's the same as the first chip we identified. | |
714 | * M-Systems say that any given DiskOnChip device should only | |
715 | * contain _one_ type of flash part, although that's not a | |
716 | * hardware restriction. */ | |
717 | if (doc->mfr) { | |
718 | if (doc->mfr == mfr && doc->id == id) | |
719 | return 1; /* This is another the same the first */ | |
720 | else | |
721 | printf("Flash chip at floor %d, chip %d is different:\n", | |
722 | floor, chip); | |
723 | } | |
724 | ||
725 | /* Print and store the manufacturer and ID codes. */ | |
726 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
727 | if (mfr == nand_flash_ids[i].manufacture_id && | |
728 | id == nand_flash_ids[i].model_id) { | |
729 | #ifdef DOC_DEBUG | |
730 | printf("Flash chip found: Manufacturer ID: %2.2X, " | |
731 | "Chip ID: %2.2X (%s)\n", mfr, id, | |
732 | nand_flash_ids[i].name); | |
733 | #endif | |
734 | if (!doc->mfr) { | |
735 | doc->mfr = mfr; | |
736 | doc->id = id; | |
737 | doc->chipshift = | |
738 | nand_flash_ids[i].chipshift; | |
739 | doc->page256 = nand_flash_ids[i].page256; | |
740 | doc->pageadrlen = | |
741 | nand_flash_ids[i].pageadrlen; | |
742 | doc->erasesize = | |
743 | nand_flash_ids[i].erasesize; | |
744 | doc->chips_name = | |
745 | nand_flash_ids[i].name; | |
746 | return 1; | |
747 | } | |
748 | return 0; | |
749 | } | |
750 | } | |
751 | ||
752 | ||
753 | #ifdef DOC_DEBUG | |
754 | /* We haven't fully identified the chip. Print as much as we know. */ | |
755 | printf("Unknown flash chip found: %2.2X %2.2X\n", | |
756 | id, mfr); | |
757 | #endif | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
763 | ||
764 | static void DoC_ScanChips(struct DiskOnChip *this) | |
765 | { | |
766 | int floor, chip; | |
767 | int numchips[MAX_FLOORS]; | |
768 | int maxchips = MAX_CHIPS; | |
769 | int ret = 1; | |
770 | ||
771 | this->numchips = 0; | |
772 | this->mfr = 0; | |
773 | this->id = 0; | |
774 | ||
775 | if (DoC_is_Millennium(this)) | |
776 | maxchips = MAX_CHIPS_MIL; | |
777 | ||
778 | /* For each floor, find the number of valid chips it contains */ | |
779 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
780 | ret = 1; | |
781 | numchips[floor] = 0; | |
782 | for (chip = 0; chip < maxchips && ret != 0; chip++) { | |
783 | ||
784 | ret = DoC_IdentChip(this, floor, chip); | |
785 | if (ret) { | |
786 | numchips[floor]++; | |
787 | this->numchips++; | |
788 | } | |
789 | } | |
790 | } | |
791 | ||
792 | /* If there are none at all that we recognise, bail */ | |
793 | if (!this->numchips) { | |
794 | puts ("No flash chips recognised.\n"); | |
795 | return; | |
796 | } | |
797 | ||
798 | /* Allocate an array to hold the information for each chip */ | |
799 | this->chips = malloc(sizeof(struct Nand) * this->numchips); | |
800 | if (!this->chips) { | |
801 | puts ("No memory for allocating chip info structures\n"); | |
802 | return; | |
803 | } | |
804 | ||
805 | ret = 0; | |
806 | ||
807 | /* Fill out the chip array with {floor, chipno} for each | |
808 | * detected chip in the device. */ | |
809 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
810 | for (chip = 0; chip < numchips[floor]; chip++) { | |
811 | this->chips[ret].floor = floor; | |
812 | this->chips[ret].chip = chip; | |
813 | this->chips[ret].curadr = 0; | |
814 | this->chips[ret].curmode = 0x50; | |
815 | ret++; | |
816 | } | |
817 | } | |
818 | ||
819 | /* Calculate and print the total size of the device */ | |
820 | this->totlen = this->numchips * (1 << this->chipshift); | |
821 | ||
822 | #ifdef DOC_DEBUG | |
823 | printf("%d flash chips found. Total DiskOnChip size: %ld MB\n", | |
824 | this->numchips, this->totlen >> 20); | |
825 | #endif | |
826 | } | |
827 | ||
828 | /* find_boot_record: Find the NFTL Media Header and its Spare copy which contains the | |
829 | * various device information of the NFTL partition and Bad Unit Table. Update | |
830 | * the ReplUnitTable[] table accroding to the Bad Unit Table. ReplUnitTable[] | |
831 | * is used for management of Erase Unit in other routines in nftl.c and nftlmount.c | |
832 | */ | |
833 | static int find_boot_record(struct NFTLrecord *nftl) | |
834 | { | |
835 | struct nftl_uci1 h1; | |
836 | struct nftl_oob oob; | |
837 | unsigned int block, boot_record_count = 0; | |
838 | int retlen; | |
839 | u8 buf[SECTORSIZE]; | |
840 | struct NFTLMediaHeader *mh = &nftl->MediaHdr; | |
841 | unsigned int i; | |
842 | ||
843 | nftl->MediaUnit = BLOCK_NIL; | |
844 | nftl->SpareMediaUnit = BLOCK_NIL; | |
845 | ||
846 | /* search for a valid boot record */ | |
847 | for (block = 0; block < nftl->nb_blocks; block++) { | |
848 | int ret; | |
849 | ||
850 | /* Check for ANAND header first. Then can whinge if it's found but later | |
851 | checks fail */ | |
852 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize, SECTORSIZE, | |
77ddac94 | 853 | (size_t *)&retlen, buf, NULL))) { |
c609719b WD |
854 | static int warncount = 5; |
855 | ||
856 | if (warncount) { | |
857 | printf("Block read at 0x%x failed\n", block * nftl->EraseSize); | |
858 | if (!--warncount) | |
859 | puts ("Further failures for this block will not be printed\n"); | |
860 | } | |
861 | continue; | |
862 | } | |
863 | ||
864 | if (retlen < 6 || memcmp(buf, "ANAND", 6)) { | |
865 | /* ANAND\0 not found. Continue */ | |
866 | #ifdef PSYCHO_DEBUG | |
867 | printf("ANAND header not found at 0x%x\n", block * nftl->EraseSize); | |
868 | #endif | |
869 | continue; | |
870 | } | |
871 | ||
872 | #ifdef NFTL_DEBUG | |
873 | printf("ANAND header found at 0x%x\n", block * nftl->EraseSize); | |
874 | #endif | |
875 | ||
876 | /* To be safer with BIOS, also use erase mark as discriminant */ | |
877 | if ((ret = doc_read_oob(nftl->mtd, block * nftl->EraseSize + SECTORSIZE + 8, | |
77ddac94 | 878 | 8, (size_t *)&retlen, (uchar *)&h1) < 0)) { |
c609719b WD |
879 | #ifdef NFTL_DEBUG |
880 | printf("ANAND header found at 0x%x, but OOB data read failed\n", | |
881 | block * nftl->EraseSize); | |
882 | #endif | |
883 | continue; | |
884 | } | |
885 | ||
886 | /* OK, we like it. */ | |
887 | ||
888 | if (boot_record_count) { | |
889 | /* We've already processed one. So we just check if | |
890 | this one is the same as the first one we found */ | |
891 | if (memcmp(mh, buf, sizeof(struct NFTLMediaHeader))) { | |
892 | #ifdef NFTL_DEBUG | |
893 | printf("NFTL Media Headers at 0x%x and 0x%x disagree.\n", | |
894 | nftl->MediaUnit * nftl->EraseSize, block * nftl->EraseSize); | |
895 | #endif | |
896 | /* if (debug) Print both side by side */ | |
897 | return -1; | |
898 | } | |
899 | if (boot_record_count == 1) | |
900 | nftl->SpareMediaUnit = block; | |
901 | ||
902 | boot_record_count++; | |
903 | continue; | |
904 | } | |
905 | ||
906 | /* This is the first we've seen. Copy the media header structure into place */ | |
907 | memcpy(mh, buf, sizeof(struct NFTLMediaHeader)); | |
908 | ||
909 | /* Do some sanity checks on it */ | |
7205e407 WD |
910 | if (mh->UnitSizeFactor == 0) { |
911 | #ifdef NFTL_DEBUG | |
912 | puts ("UnitSizeFactor 0x00 detected.\n" | |
913 | "This violates the spec but we think we know what it means...\n"); | |
914 | #endif | |
915 | } else if (mh->UnitSizeFactor != 0xff) { | |
916 | printf ("Sorry, we don't support UnitSizeFactor " | |
c609719b WD |
917 | "of != 1 yet.\n"); |
918 | return -1; | |
919 | } | |
920 | ||
921 | nftl->nb_boot_blocks = le16_to_cpu(mh->FirstPhysicalEUN); | |
922 | if ((nftl->nb_boot_blocks + 2) >= nftl->nb_blocks) { | |
923 | printf ("NFTL Media Header sanity check failed:\n" | |
924 | "nb_boot_blocks (%d) + 2 > nb_blocks (%d)\n", | |
925 | nftl->nb_boot_blocks, nftl->nb_blocks); | |
926 | return -1; | |
927 | } | |
928 | ||
929 | nftl->numvunits = le32_to_cpu(mh->FormattedSize) / nftl->EraseSize; | |
930 | if (nftl->numvunits > (nftl->nb_blocks - nftl->nb_boot_blocks - 2)) { | |
931 | printf ("NFTL Media Header sanity check failed:\n" | |
932 | "numvunits (%d) > nb_blocks (%d) - nb_boot_blocks(%d) - 2\n", | |
933 | nftl->numvunits, | |
934 | nftl->nb_blocks, | |
935 | nftl->nb_boot_blocks); | |
936 | return -1; | |
937 | } | |
938 | ||
939 | nftl->nr_sects = nftl->numvunits * (nftl->EraseSize / SECTORSIZE); | |
940 | ||
941 | /* If we're not using the last sectors in the device for some reason, | |
942 | reduce nb_blocks accordingly so we forget they're there */ | |
943 | nftl->nb_blocks = le16_to_cpu(mh->NumEraseUnits) + le16_to_cpu(mh->FirstPhysicalEUN); | |
944 | ||
945 | /* read the Bad Erase Unit Table and modify ReplUnitTable[] accordingly */ | |
946 | for (i = 0; i < nftl->nb_blocks; i++) { | |
947 | if ((i & (SECTORSIZE - 1)) == 0) { | |
948 | /* read one sector for every SECTORSIZE of blocks */ | |
949 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize + | |
950 | i + SECTORSIZE, SECTORSIZE, | |
77ddac94 | 951 | (size_t *)&retlen, buf, (uchar *)&oob)) < 0) { |
c609719b WD |
952 | puts ("Read of bad sector table failed\n"); |
953 | return -1; | |
954 | } | |
955 | } | |
956 | /* mark the Bad Erase Unit as RESERVED in ReplUnitTable */ | |
957 | if (buf[i & (SECTORSIZE - 1)] != 0xff) | |
958 | nftl->ReplUnitTable[i] = BLOCK_RESERVED; | |
959 | } | |
960 | ||
961 | nftl->MediaUnit = block; | |
962 | boot_record_count++; | |
963 | ||
964 | } /* foreach (block) */ | |
965 | ||
966 | return boot_record_count?0:-1; | |
967 | } | |
968 | ||
969 | /* This routine is made available to other mtd code via | |
970 | * inter_module_register. It must only be accessed through | |
971 | * inter_module_get which will bump the use count of this module. The | |
972 | * addresses passed back in mtd are valid as long as the use count of | |
973 | * this module is non-zero, i.e. between inter_module_get and | |
974 | * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. | |
975 | */ | |
976 | static void DoC2k_init(struct DiskOnChip* this) | |
977 | { | |
978 | struct NFTLrecord *nftl; | |
979 | ||
980 | switch (this->ChipID) { | |
981 | case DOC_ChipID_Doc2k: | |
982 | this->name = "DiskOnChip 2000"; | |
983 | this->ioreg = DoC_2k_CDSN_IO; | |
984 | break; | |
985 | case DOC_ChipID_DocMil: | |
986 | this->name = "DiskOnChip Millennium"; | |
987 | this->ioreg = DoC_Mil_CDSN_IO; | |
988 | break; | |
989 | } | |
990 | ||
991 | #ifdef DOC_DEBUG | |
992 | printf("%s found at address 0x%lX\n", this->name, | |
993 | this->physadr); | |
994 | #endif | |
995 | ||
996 | this->totlen = 0; | |
997 | this->numchips = 0; | |
998 | ||
999 | this->curfloor = -1; | |
1000 | this->curchip = -1; | |
1001 | ||
1002 | /* Ident all the chips present. */ | |
1003 | DoC_ScanChips(this); | |
7205e407 WD |
1004 | if ((!this->numchips) || (!this->chips)) |
1005 | return; | |
c609719b WD |
1006 | |
1007 | nftl = &this->nftl; | |
1008 | ||
1009 | /* Get physical parameters */ | |
1010 | nftl->EraseSize = this->erasesize; | |
8bde7f77 | 1011 | nftl->nb_blocks = this->totlen / this->erasesize; |
c609719b WD |
1012 | nftl->mtd = this; |
1013 | ||
1014 | if (find_boot_record(nftl) != 0) | |
1015 | this->nftl_found = 0; | |
1016 | else | |
1017 | this->nftl_found = 1; | |
1018 | ||
1019 | printf("%s @ 0x%lX, %ld MB\n", this->name, this->physadr, this->totlen >> 20); | |
1020 | } | |
1021 | ||
1022 | int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len, | |
1023 | size_t * retlen, u_char * buf, u_char * eccbuf) | |
1024 | { | |
1025 | unsigned long docptr; | |
1026 | struct Nand *mychip; | |
1027 | unsigned char syndrome[6]; | |
1028 | volatile char dummy; | |
1029 | int i, len256 = 0, ret=0; | |
1030 | ||
1031 | docptr = this->virtadr; | |
1032 | ||
1033 | /* Don't allow read past end of device */ | |
1034 | if (from >= this->totlen) { | |
1035 | puts ("Out of flash\n"); | |
1036 | return DOC_EINVAL; | |
1037 | } | |
1038 | ||
1039 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
1040 | if (from + len > ((from | 0x1ff) + 1)) | |
1041 | len = ((from | 0x1ff) + 1) - from; | |
1042 | ||
1043 | /* The ECC will not be calculated correctly if less than 512 is read */ | |
1044 | if (len != 0x200 && eccbuf) | |
1045 | printf("ECC needs a full sector read (adr: %lx size %lx)\n", | |
1046 | (long) from, (long) len); | |
1047 | ||
7152b1d0 | 1048 | #ifdef PSYCHO_DEBUG |
c609719b WD |
1049 | printf("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); |
1050 | #endif | |
1051 | ||
1052 | /* Find the chip which is to be used and select it */ | |
1053 | mychip = &this->chips[shr(from, this->chipshift)]; | |
1054 | ||
1055 | if (this->curfloor != mychip->floor) { | |
1056 | DoC_SelectFloor(this, mychip->floor); | |
1057 | DoC_SelectChip(this, mychip->chip); | |
1058 | } else if (this->curchip != mychip->chip) { | |
1059 | DoC_SelectChip(this, mychip->chip); | |
1060 | } | |
1061 | ||
1062 | this->curfloor = mychip->floor; | |
1063 | this->curchip = mychip->chip; | |
1064 | ||
1065 | DoC_Command(this, | |
1066 | (!this->page256 | |
1067 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1068 | CDSN_CTRL_WP); | |
1069 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, | |
1070 | CDSN_CTRL_ECC_IO); | |
1071 | ||
1072 | if (eccbuf) { | |
1073 | /* Prime the ECC engine */ | |
1074 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1075 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
1076 | } else { | |
1077 | /* disable the ECC engine */ | |
1078 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1079 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1080 | } | |
1081 | ||
1082 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1083 | if (this->page256 && from + len > (from | 0xff) + 1) { | |
1084 | len256 = (from | 0xff) + 1 - from; | |
1085 | DoC_ReadBuf(this, buf, len256); | |
1086 | ||
1087 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); | |
1088 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, | |
1089 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); | |
1090 | } | |
1091 | ||
1092 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1093 | ||
1094 | /* Let the caller know we completed it */ | |
1095 | *retlen = len; | |
1096 | ||
1097 | if (eccbuf) { | |
1098 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1099 | /* Note: this will work even with 2M x 8bit devices as */ | |
1100 | /* they have 8 bytes of OOB per 256 page. mf. */ | |
1101 | DoC_ReadBuf(this, eccbuf, 6); | |
1102 | ||
1103 | /* Flush the pipeline */ | |
1104 | if (DoC_is_Millennium(this)) { | |
1105 | dummy = ReadDOC(docptr, ECCConf); | |
1106 | dummy = ReadDOC(docptr, ECCConf); | |
1107 | i = ReadDOC(docptr, ECCConf); | |
1108 | } else { | |
1109 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1110 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1111 | i = ReadDOC(docptr, 2k_ECCStatus); | |
1112 | } | |
1113 | ||
1114 | /* Check the ECC Status */ | |
1115 | if (i & 0x80) { | |
1116 | int nb_errors; | |
1117 | /* There was an ECC error */ | |
1118 | #ifdef ECC_DEBUG | |
1119 | printf("DiskOnChip ECC Error: Read at %lx\n", (long)from); | |
1120 | #endif | |
1121 | /* Read the ECC syndrom through the DiskOnChip ECC logic. | |
1122 | These syndrome will be all ZERO when there is no error */ | |
1123 | for (i = 0; i < 6; i++) { | |
1124 | syndrome[i] = | |
1125 | ReadDOC(docptr, ECCSyndrome0 + i); | |
1126 | } | |
8bde7f77 | 1127 | nb_errors = doc_decode_ecc(buf, syndrome); |
c609719b WD |
1128 | |
1129 | #ifdef ECC_DEBUG | |
1130 | printf("Errors corrected: %x\n", nb_errors); | |
1131 | #endif | |
8bde7f77 | 1132 | if (nb_errors < 0) { |
c609719b WD |
1133 | /* We return error, but have actually done the read. Not that |
1134 | this can be told to user-space, via sys_read(), but at least | |
1135 | MTD-aware stuff can know about it by checking *retlen */ | |
1136 | printf("ECC Errors at %lx\n", (long)from); | |
1137 | ret = DOC_EECC; | |
8bde7f77 | 1138 | } |
c609719b WD |
1139 | } |
1140 | ||
1141 | #ifdef PSYCHO_DEBUG | |
1142 | printf("ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1143 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], | |
1144 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
1145 | #endif | |
1146 | ||
1147 | /* disable the ECC engine */ | |
1148 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); | |
1149 | } | |
1150 | ||
1151 | /* according to 11.4.1, we need to wait for the busy line | |
8bde7f77 | 1152 | * drop if we read to the end of the page. */ |
c609719b WD |
1153 | if(0 == ((from + *retlen) & 0x1ff)) |
1154 | { | |
1155 | DoC_WaitReady(this); | |
1156 | } | |
1157 | ||
1158 | return ret; | |
1159 | } | |
1160 | ||
1161 | int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len, | |
1162 | size_t * retlen, const u_char * buf, | |
1163 | u_char * eccbuf) | |
1164 | { | |
1165 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ | |
1166 | unsigned long docptr; | |
1167 | volatile char dummy; | |
1168 | int len256 = 0; | |
1169 | struct Nand *mychip; | |
1170 | ||
1171 | docptr = this->virtadr; | |
1172 | ||
1173 | /* Don't allow write past end of device */ | |
1174 | if (to >= this->totlen) { | |
1175 | puts ("Out of flash\n"); | |
1176 | return DOC_EINVAL; | |
1177 | } | |
1178 | ||
1179 | /* Don't allow a single write to cross a 512-byte block boundary */ | |
1180 | if (to + len > ((to | 0x1ff) + 1)) | |
1181 | len = ((to | 0x1ff) + 1) - to; | |
1182 | ||
1183 | /* The ECC will not be calculated correctly if less than 512 is written */ | |
1184 | if (len != 0x200 && eccbuf) | |
1185 | printf("ECC needs a full sector write (adr: %lx size %lx)\n", | |
1186 | (long) to, (long) len); | |
1187 | ||
1188 | /* printf("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ | |
1189 | ||
1190 | /* Find the chip which is to be used and select it */ | |
1191 | mychip = &this->chips[shr(to, this->chipshift)]; | |
1192 | ||
1193 | if (this->curfloor != mychip->floor) { | |
1194 | DoC_SelectFloor(this, mychip->floor); | |
1195 | DoC_SelectChip(this, mychip->chip); | |
1196 | } else if (this->curchip != mychip->chip) { | |
1197 | DoC_SelectChip(this, mychip->chip); | |
1198 | } | |
1199 | ||
1200 | this->curfloor = mychip->floor; | |
1201 | this->curchip = mychip->chip; | |
1202 | ||
1203 | /* Set device to main plane of flash */ | |
1204 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1205 | DoC_Command(this, | |
1206 | (!this->page256 | |
1207 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1208 | CDSN_CTRL_WP); | |
1209 | ||
1210 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1211 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); | |
1212 | ||
1213 | if (eccbuf) { | |
1214 | /* Prime the ECC engine */ | |
1215 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1216 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
1217 | } else { | |
1218 | /* disable the ECC engine */ | |
1219 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1220 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1221 | } | |
1222 | ||
1223 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1224 | if (this->page256 && to + len > (to | 0xff) + 1) { | |
1225 | len256 = (to | 0xff) + 1 - to; | |
1226 | DoC_WriteBuf(this, buf, len256); | |
1227 | ||
1228 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1229 | ||
1230 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1231 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1232 | ||
1233 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1234 | DoC_Delay(this, 2); | |
1235 | ||
1236 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1237 | puts ("Error programming flash\n"); | |
1238 | /* Error in programming */ | |
1239 | *retlen = 0; | |
1240 | return DOC_EIO; | |
1241 | } | |
1242 | ||
1243 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1244 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, | |
1245 | CDSN_CTRL_ECC_IO); | |
1246 | } | |
1247 | ||
1248 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1249 | ||
1250 | if (eccbuf) { | |
1251 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, | |
1252 | CDSNControl); | |
1253 | ||
1254 | if (DoC_is_Millennium(this)) { | |
1255 | WriteDOC(0, docptr, NOP); | |
1256 | WriteDOC(0, docptr, NOP); | |
1257 | WriteDOC(0, docptr, NOP); | |
1258 | } else { | |
1259 | WriteDOC_(0, docptr, this->ioreg); | |
1260 | WriteDOC_(0, docptr, this->ioreg); | |
1261 | WriteDOC_(0, docptr, this->ioreg); | |
1262 | } | |
1263 | ||
1264 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1265 | for (di = 0; di < 6; di++) { | |
1266 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); | |
1267 | } | |
1268 | ||
1269 | /* Reset the ECC engine */ | |
1270 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1271 | ||
1272 | #ifdef PSYCHO_DEBUG | |
1273 | printf | |
1274 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1275 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
1276 | eccbuf[4], eccbuf[5]); | |
1277 | #endif | |
1278 | } | |
1279 | ||
1280 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1281 | ||
1282 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1283 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1284 | ||
1285 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1286 | DoC_Delay(this, 2); | |
1287 | ||
1288 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1289 | puts ("Error programming flash\n"); | |
1290 | /* Error in programming */ | |
1291 | *retlen = 0; | |
1292 | return DOC_EIO; | |
1293 | } | |
1294 | ||
1295 | /* Let the caller know we completed it */ | |
1296 | *retlen = len; | |
1297 | ||
1298 | if (eccbuf) { | |
1299 | unsigned char x[8]; | |
1300 | size_t dummy; | |
1301 | int ret; | |
1302 | ||
1303 | /* Write the ECC data to flash */ | |
1304 | for (di=0; di<6; di++) | |
1305 | x[di] = eccbuf[di]; | |
1306 | ||
1307 | x[6]=0x55; | |
1308 | x[7]=0x55; | |
1309 | ||
1310 | ret = doc_write_oob(this, to, 8, &dummy, x); | |
1311 | return ret; | |
1312 | } | |
1313 | return 0; | |
1314 | } | |
1315 | ||
1316 | int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1317 | size_t * retlen, u_char * buf) | |
1318 | { | |
1319 | int len256 = 0, ret; | |
1320 | unsigned long docptr; | |
1321 | struct Nand *mychip; | |
1322 | ||
1323 | docptr = this->virtadr; | |
1324 | ||
1325 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1326 | ||
1327 | if (this->curfloor != mychip->floor) { | |
1328 | DoC_SelectFloor(this, mychip->floor); | |
1329 | DoC_SelectChip(this, mychip->chip); | |
1330 | } else if (this->curchip != mychip->chip) { | |
1331 | DoC_SelectChip(this, mychip->chip); | |
1332 | } | |
1333 | this->curfloor = mychip->floor; | |
1334 | this->curchip = mychip->chip; | |
1335 | ||
1336 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1337 | /* page to maintain compatibility with doc_read_ecc. */ | |
1338 | if (this->page256) { | |
1339 | if (!(ofs & 0x8)) | |
1340 | ofs += 0x100; | |
1341 | else | |
1342 | ofs -= 0x8; | |
1343 | } | |
1344 | ||
1345 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1346 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); | |
1347 | ||
1348 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1349 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1350 | /* next OOB block, but it didn't work here. mf. */ | |
1351 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1352 | len256 = (ofs | 0x7) + 1 - ofs; | |
1353 | DoC_ReadBuf(this, buf, len256); | |
1354 | ||
1355 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1356 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), | |
1357 | CDSN_CTRL_WP, 0); | |
1358 | } | |
1359 | ||
1360 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1361 | ||
1362 | *retlen = len; | |
1363 | /* Reading the full OOB data drops us off of the end of the page, | |
8bde7f77 WD |
1364 | * causing the flash device to go into busy mode, so we need |
1365 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ | |
c609719b WD |
1366 | |
1367 | ret = DoC_WaitReady(this); | |
1368 | ||
1369 | return ret; | |
1370 | ||
1371 | } | |
1372 | ||
1373 | int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1374 | size_t * retlen, const u_char * buf) | |
1375 | { | |
1376 | int len256 = 0; | |
1377 | unsigned long docptr = this->virtadr; | |
1378 | struct Nand *mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1379 | volatile int dummy; | |
1380 | ||
1381 | #ifdef PSYCHO_DEBUG | |
1382 | printf("doc_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n", | |
1383 | (long)ofs, len, buf[0], buf[1], buf[2], buf[3], | |
1384 | buf[8], buf[9], buf[14],buf[15]); | |
1385 | #endif | |
1386 | ||
1387 | /* Find the chip which is to be used and select it */ | |
1388 | if (this->curfloor != mychip->floor) { | |
1389 | DoC_SelectFloor(this, mychip->floor); | |
1390 | DoC_SelectChip(this, mychip->chip); | |
1391 | } else if (this->curchip != mychip->chip) { | |
1392 | DoC_SelectChip(this, mychip->chip); | |
1393 | } | |
1394 | this->curfloor = mychip->floor; | |
1395 | this->curchip = mychip->chip; | |
1396 | ||
1397 | /* disable the ECC engine */ | |
1398 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); | |
1399 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); | |
1400 | ||
1401 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
1402 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1403 | ||
1404 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ | |
1405 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1406 | ||
1407 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1408 | /* page to maintain compatibility with doc_read_ecc. */ | |
1409 | if (this->page256) { | |
1410 | if (!(ofs & 0x8)) | |
1411 | ofs += 0x100; | |
1412 | else | |
1413 | ofs -= 0x8; | |
1414 | } | |
1415 | ||
1416 | /* issue the Serial Data In command to initial the Page Program process */ | |
1417 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1418 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); | |
1419 | ||
1420 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1421 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1422 | /* next OOB block, but it didn't work here. mf. */ | |
1423 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1424 | len256 = (ofs | 0x7) + 1 - ofs; | |
1425 | DoC_WriteBuf(this, buf, len256); | |
1426 | ||
1427 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1428 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1429 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1430 | ||
1431 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1432 | DoC_Delay(this, 2); | |
1433 | ||
1434 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1435 | puts ("Error programming oob data\n"); | |
1436 | /* There was an error */ | |
1437 | *retlen = 0; | |
1438 | return DOC_EIO; | |
1439 | } | |
1440 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1441 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); | |
1442 | } | |
1443 | ||
1444 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1445 | ||
1446 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1447 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1448 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1449 | ||
1450 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1451 | DoC_Delay(this, 2); | |
1452 | ||
1453 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1454 | puts ("Error programming oob data\n"); | |
1455 | /* There was an error */ | |
1456 | *retlen = 0; | |
1457 | return DOC_EIO; | |
1458 | } | |
1459 | ||
1460 | *retlen = len; | |
1461 | return 0; | |
1462 | ||
1463 | } | |
1464 | ||
1465 | int doc_erase(struct DiskOnChip* this, loff_t ofs, size_t len) | |
1466 | { | |
1467 | volatile int dummy; | |
1468 | unsigned long docptr; | |
1469 | struct Nand *mychip; | |
1470 | ||
1471 | if (ofs & (this->erasesize-1) || len & (this->erasesize-1)) { | |
1472 | puts ("Offset and size must be sector aligned\n"); | |
1473 | return DOC_EINVAL; | |
1474 | } | |
1475 | ||
1476 | docptr = this->virtadr; | |
1477 | ||
1478 | /* FIXME: Do this in the background. Use timers or schedule_task() */ | |
1479 | while(len) { | |
1480 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1481 | ||
1482 | if (this->curfloor != mychip->floor) { | |
1483 | DoC_SelectFloor(this, mychip->floor); | |
1484 | DoC_SelectChip(this, mychip->chip); | |
1485 | } else if (this->curchip != mychip->chip) { | |
1486 | DoC_SelectChip(this, mychip->chip); | |
1487 | } | |
1488 | this->curfloor = mychip->floor; | |
1489 | this->curchip = mychip->chip; | |
1490 | ||
1491 | DoC_Command(this, NAND_CMD_ERASE1, 0); | |
1492 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); | |
1493 | DoC_Command(this, NAND_CMD_ERASE2, 0); | |
1494 | ||
1495 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1496 | ||
1497 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1498 | DoC_Delay(this, 2); | |
1499 | ||
1500 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1501 | printf("Error erasing at 0x%lx\n", (long)ofs); | |
1502 | /* There was an error */ | |
1503 | goto callback; | |
1504 | } | |
1505 | ofs += this->erasesize; | |
1506 | len -= this->erasesize; | |
1507 | } | |
1508 | ||
1509 | callback: | |
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | static inline int doccheck(unsigned long potential, unsigned long physadr) | |
1514 | { | |
1515 | unsigned long window=potential; | |
1516 | unsigned char tmp, ChipID; | |
1517 | #ifndef DOC_PASSIVE_PROBE | |
1518 | unsigned char tmp2; | |
1519 | #endif | |
1520 | ||
1521 | /* Routine copied from the Linux DOC driver */ | |
1522 | ||
1523 | #ifdef CFG_DOCPROBE_55AA | |
1524 | /* Check for 0x55 0xAA signature at beginning of window, | |
1525 | this is no longer true once we remove the IPL (for Millennium */ | |
1526 | if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa) | |
1527 | return 0; | |
1528 | #endif /* CFG_DOCPROBE_55AA */ | |
1529 | ||
1530 | #ifndef DOC_PASSIVE_PROBE | |
1531 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1532 | * bootup procedure will put the device into reset mode, and | |
1533 | * it's not possible to talk to it without actually writing | |
1534 | * to the DOCControl register. So we store the current contents | |
1535 | * of the DOCControl register's location, in case we later decide | |
1536 | * that it's not a DiskOnChip, and want to put it back how we | |
1537 | * found it. | |
1538 | */ | |
1539 | tmp2 = ReadDOC(window, DOCControl); | |
1540 | ||
1541 | /* Reset the DiskOnChip ASIC */ | |
1542 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1543 | window, DOCControl); | |
1544 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1545 | window, DOCControl); | |
1546 | ||
1547 | /* Enable the DiskOnChip ASIC */ | |
1548 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1549 | window, DOCControl); | |
1550 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1551 | window, DOCControl); | |
1552 | #endif /* !DOC_PASSIVE_PROBE */ | |
1553 | ||
1554 | ChipID = ReadDOC(window, ChipID); | |
1555 | ||
1556 | switch (ChipID) { | |
1557 | case DOC_ChipID_Doc2k: | |
1558 | /* Check the TOGGLE bit in the ECC register */ | |
1559 | tmp = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; | |
1560 | if ((ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT) != tmp) | |
1561 | return ChipID; | |
1562 | break; | |
1563 | ||
1564 | case DOC_ChipID_DocMil: | |
1565 | /* Check the TOGGLE bit in the ECC register */ | |
1566 | tmp = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; | |
1567 | if ((ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT) != tmp) | |
1568 | return ChipID; | |
1569 | break; | |
1570 | ||
1571 | default: | |
1572 | #ifndef CFG_DOCPROBE_55AA | |
1573 | /* | |
1574 | * if the ID isn't the DoC2000 or DoCMillenium ID, so we can assume | |
1575 | * the DOC is missing | |
1576 | */ | |
1577 | # if 0 | |
1578 | printf("Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n", | |
1579 | ChipID, physadr); | |
1580 | # endif | |
1581 | #endif | |
1582 | #ifndef DOC_PASSIVE_PROBE | |
1583 | /* Put back the contents of the DOCControl register, in case it's not | |
1584 | * actually a DiskOnChip. | |
1585 | */ | |
1586 | WriteDOC(tmp2, window, DOCControl); | |
1587 | #endif | |
1588 | return 0; | |
1589 | } | |
1590 | ||
1591 | puts ("DiskOnChip failed TOGGLE test, dropping.\n"); | |
1592 | ||
1593 | #ifndef DOC_PASSIVE_PROBE | |
1594 | /* Put back the contents of the DOCControl register: it's not a DiskOnChip */ | |
1595 | WriteDOC(tmp2, window, DOCControl); | |
1596 | #endif | |
1597 | return 0; | |
1598 | } | |
1599 | ||
1600 | void doc_probe(unsigned long physadr) | |
1601 | { | |
1602 | struct DiskOnChip *this = NULL; | |
1603 | int i=0, ChipID; | |
1604 | ||
1605 | if ((ChipID = doccheck(physadr, physadr))) { | |
1606 | ||
1607 | for (i=0; i<CFG_MAX_DOC_DEVICE; i++) { | |
1608 | if (doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) { | |
1609 | this = doc_dev_desc + i; | |
1610 | break; | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | if (!this) { | |
1615 | puts ("Cannot allocate memory for data structures.\n"); | |
1616 | return; | |
1617 | } | |
1618 | ||
1619 | if (curr_device == -1) | |
1620 | curr_device = i; | |
1621 | ||
1622 | memset((char *)this, 0, sizeof(struct DiskOnChip)); | |
1623 | ||
1624 | this->virtadr = physadr; | |
1625 | this->physadr = physadr; | |
1626 | this->ChipID = ChipID; | |
1627 | ||
1628 | DoC2k_init(this); | |
1629 | } else { | |
1630 | puts ("No DiskOnChip found\n"); | |
1631 | } | |
1632 | } | |
cfa460ad WJ |
1633 | #else |
1634 | void doc_probe(unsigned long physadr) {} | |
1635 | #endif |