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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 | |
3043c045 WJ |
17 | /* |
18 | * ! BROKEN ! | |
19 | * | |
20 | * TODO: must be implemented and tested by someone with HW | |
21 | */ | |
cfa460ad | 22 | #if 0 |
6d0f6bcf | 23 | #ifdef CONFIG_SYS_DOC_SUPPORT_2000 |
c609719b WD |
24 | #define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) |
25 | #else | |
26 | #define DoC_is_2000(doc) (0) | |
27 | #endif | |
28 | ||
6d0f6bcf | 29 | #ifdef CONFIG_SYS_DOC_SUPPORT_MILLENNIUM |
c609719b WD |
30 | #define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) |
31 | #else | |
32 | #define DoC_is_Millennium(doc) (0) | |
33 | #endif | |
34 | ||
6d0f6bcf | 35 | /* CONFIG_SYS_DOC_PASSIVE_PROBE: |
c609719b WD |
36 | In order to ensure that the BIOS checksum is correct at boot time, and |
37 | hence that the onboard BIOS extension gets executed, the DiskOnChip | |
38 | goes into reset mode when it is read sequentially: all registers | |
39 | return 0xff until the chip is woken up again by writing to the | |
40 | DOCControl register. | |
41 | ||
42 | Unfortunately, this means that the probe for the DiskOnChip is unsafe, | |
43 | because one of the first things it does is write to where it thinks | |
44 | the DOCControl register should be - which may well be shared memory | |
45 | for another device. I've had machines which lock up when this is | |
46 | attempted. Hence the possibility to do a passive probe, which will fail | |
47 | to detect a chip in reset mode, but is at least guaranteed not to lock | |
48 | the machine. | |
49 | ||
50 | If you have this problem, uncomment the following line: | |
6d0f6bcf | 51 | #define CONFIG_SYS_DOC_PASSIVE_PROBE |
c609719b WD |
52 | */ |
53 | ||
54 | #undef DOC_DEBUG | |
55 | #undef ECC_DEBUG | |
56 | #undef PSYCHO_DEBUG | |
57 | #undef NFTL_DEBUG | |
58 | ||
6d0f6bcf | 59 | static struct DiskOnChip doc_dev_desc[CONFIG_SYS_MAX_DOC_DEVICE]; |
c609719b WD |
60 | |
61 | /* Current DOC Device */ | |
62 | static int curr_device = -1; | |
63 | ||
2fc000d7 MB |
64 | /* Supported NAND flash devices */ |
65 | static struct nand_flash_dev nand_flash_ids[] = { | |
66 | {"Toshiba TC5816BDC", NAND_MFR_TOSHIBA, 0x64, 21, 1, 2, 0x1000, 0}, | |
67 | {"Toshiba TC5832DC", NAND_MFR_TOSHIBA, 0x6b, 22, 0, 2, 0x2000, 0}, | |
68 | {"Toshiba TH58V128DC", NAND_MFR_TOSHIBA, 0x73, 24, 0, 2, 0x4000, 0}, | |
69 | {"Toshiba TC58256FT/DC", NAND_MFR_TOSHIBA, 0x75, 25, 0, 2, 0x4000, 0}, | |
70 | {"Toshiba TH58512FT", NAND_MFR_TOSHIBA, 0x76, 26, 0, 3, 0x4000, 0}, | |
71 | {"Toshiba TC58V32DC", NAND_MFR_TOSHIBA, 0xe5, 22, 0, 2, 0x2000, 0}, | |
72 | {"Toshiba TC58V64AFT/DC", NAND_MFR_TOSHIBA, 0xe6, 23, 0, 2, 0x2000, 0}, | |
73 | {"Toshiba TC58V16BDC", NAND_MFR_TOSHIBA, 0xea, 21, 1, 2, 0x1000, 0}, | |
74 | {"Toshiba TH58100FT", NAND_MFR_TOSHIBA, 0x79, 27, 0, 3, 0x4000, 0}, | |
75 | {"Samsung KM29N16000", NAND_MFR_SAMSUNG, 0x64, 21, 1, 2, 0x1000, 0}, | |
76 | {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0x6b, 22, 0, 2, 0x2000, 0}, | |
77 | {"Samsung KM29U128T", NAND_MFR_SAMSUNG, 0x73, 24, 0, 2, 0x4000, 0}, | |
78 | {"Samsung KM29U256T", NAND_MFR_SAMSUNG, 0x75, 25, 0, 2, 0x4000, 0}, | |
79 | {"Samsung unknown 64Mb", NAND_MFR_SAMSUNG, 0x76, 26, 0, 3, 0x4000, 0}, | |
80 | {"Samsung KM29W32000", NAND_MFR_SAMSUNG, 0xe3, 22, 0, 2, 0x2000, 0}, | |
81 | {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0xe5, 22, 0, 2, 0x2000, 0}, | |
82 | {"Samsung KM29U64000", NAND_MFR_SAMSUNG, 0xe6, 23, 0, 2, 0x2000, 0}, | |
83 | {"Samsung KM29W16000", NAND_MFR_SAMSUNG, 0xea, 21, 1, 2, 0x1000, 0}, | |
84 | {"Samsung K9F5616Q0C", NAND_MFR_SAMSUNG, 0x45, 25, 0, 2, 0x4000, 1}, | |
85 | {"Samsung K9K1216Q0C", NAND_MFR_SAMSUNG, 0x46, 26, 0, 3, 0x4000, 1}, | |
86 | {"Samsung K9F1G08U0M", NAND_MFR_SAMSUNG, 0xf1, 27, 0, 2, 0, 0}, | |
87 | {NULL,} | |
88 | }; | |
89 | ||
c609719b WD |
90 | /* ------------------------------------------------------------------------- */ |
91 | ||
92 | int do_doc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
93 | { | |
94 | int rcode = 0; | |
95 | ||
96 | switch (argc) { | |
97 | case 0: | |
98 | case 1: | |
62c3ae7c | 99 | cmd_usage(cmdtp); |
c609719b WD |
100 | return 1; |
101 | case 2: | |
8bde7f77 | 102 | if (strcmp(argv[1],"info") == 0) { |
c609719b WD |
103 | int i; |
104 | ||
105 | putc ('\n'); | |
106 | ||
6d0f6bcf | 107 | for (i=0; i<CONFIG_SYS_MAX_DOC_DEVICE; ++i) { |
c609719b WD |
108 | if(doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) |
109 | continue; /* list only known devices */ | |
110 | printf ("Device %d: ", i); | |
111 | doc_print(&doc_dev_desc[i]); | |
112 | } | |
113 | return 0; | |
114 | ||
115 | } else if (strcmp(argv[1],"device") == 0) { | |
6d0f6bcf | 116 | if ((curr_device < 0) || (curr_device >= CONFIG_SYS_MAX_DOC_DEVICE)) { |
c609719b WD |
117 | puts ("\nno devices available\n"); |
118 | return 1; | |
119 | } | |
120 | printf ("\nDevice %d: ", curr_device); | |
121 | doc_print(&doc_dev_desc[curr_device]); | |
122 | return 0; | |
123 | } | |
62c3ae7c | 124 | cmd_usage(cmdtp); |
c609719b WD |
125 | return 1; |
126 | case 3: | |
127 | if (strcmp(argv[1],"device") == 0) { | |
128 | int dev = (int)simple_strtoul(argv[2], NULL, 10); | |
129 | ||
130 | printf ("\nDevice %d: ", dev); | |
6d0f6bcf | 131 | if (dev >= CONFIG_SYS_MAX_DOC_DEVICE) { |
c609719b WD |
132 | puts ("unknown device\n"); |
133 | return 1; | |
134 | } | |
135 | doc_print(&doc_dev_desc[dev]); | |
136 | /*doc_print (dev);*/ | |
137 | ||
138 | if (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN) { | |
139 | return 1; | |
140 | } | |
141 | ||
142 | curr_device = dev; | |
143 | ||
144 | puts ("... is now current device\n"); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
62c3ae7c | 149 | cmd_usage(cmdtp); |
c609719b WD |
150 | return 1; |
151 | default: | |
152 | /* at least 4 args */ | |
153 | ||
154 | if (strcmp(argv[1],"read") == 0 || strcmp(argv[1],"write") == 0) { | |
155 | ulong addr = simple_strtoul(argv[2], NULL, 16); | |
156 | ulong off = simple_strtoul(argv[3], NULL, 16); | |
157 | ulong size = simple_strtoul(argv[4], NULL, 16); | |
158 | int cmd = (strcmp(argv[1],"read") == 0); | |
159 | int ret, total; | |
160 | ||
161 | printf ("\nDOC %s: device %d offset %ld, size %ld ... ", | |
162 | cmd ? "read" : "write", curr_device, off, size); | |
163 | ||
164 | ret = doc_rw(doc_dev_desc + curr_device, cmd, off, size, | |
77ddac94 | 165 | (size_t *)&total, (u_char*)addr); |
c609719b WD |
166 | |
167 | printf ("%d bytes %s: %s\n", total, cmd ? "read" : "write", | |
168 | ret ? "ERROR" : "OK"); | |
169 | ||
170 | return ret; | |
171 | } else if (strcmp(argv[1],"erase") == 0) { | |
172 | ulong off = simple_strtoul(argv[2], NULL, 16); | |
173 | ulong size = simple_strtoul(argv[3], NULL, 16); | |
174 | int ret; | |
175 | ||
176 | printf ("\nDOC erase: device %d offset %ld, size %ld ... ", | |
177 | curr_device, off, size); | |
178 | ||
179 | ret = doc_erase (doc_dev_desc + curr_device, off, size); | |
180 | ||
181 | printf("%s\n", ret ? "ERROR" : "OK"); | |
182 | ||
183 | return ret; | |
184 | } else { | |
62c3ae7c | 185 | cmd_usage(cmdtp); |
c609719b WD |
186 | rcode = 1; |
187 | } | |
188 | ||
189 | return rcode; | |
190 | } | |
191 | } | |
0d498393 WD |
192 | U_BOOT_CMD( |
193 | doc, 5, 1, do_doc, | |
2fb2604d | 194 | "Disk-On-Chip sub-system", |
8bde7f77 WD |
195 | "info - show available DOC devices\n" |
196 | "doc device [dev] - show or set current device\n" | |
197 | "doc read addr off size\n" | |
198 | "doc write addr off size - read/write `size'" | |
199 | " bytes starting at offset `off'\n" | |
200 | " to/from memory address `addr'\n" | |
201 | "doc erase off size - erase `size' bytes of DOC from offset `off'\n" | |
202 | ); | |
c609719b WD |
203 | |
204 | int do_docboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
205 | { | |
206 | char *boot_device = NULL; | |
207 | char *ep; | |
208 | int dev; | |
209 | ulong cnt; | |
210 | ulong addr; | |
211 | ulong offset = 0; | |
212 | image_header_t *hdr; | |
213 | int rcode = 0; | |
09475f75 | 214 | #if defined(CONFIG_FIT) |
3bab76a2 | 215 | const void *fit_hdr = NULL; |
09475f75 | 216 | #endif |
c609719b | 217 | |
fad63407 | 218 | show_boot_progress (34); |
c609719b WD |
219 | switch (argc) { |
220 | case 1: | |
6d0f6bcf | 221 | addr = CONFIG_SYS_LOAD_ADDR; |
c609719b WD |
222 | boot_device = getenv ("bootdevice"); |
223 | break; | |
224 | case 2: | |
225 | addr = simple_strtoul(argv[1], NULL, 16); | |
226 | boot_device = getenv ("bootdevice"); | |
227 | break; | |
228 | case 3: | |
229 | addr = simple_strtoul(argv[1], NULL, 16); | |
230 | boot_device = argv[2]; | |
231 | break; | |
232 | case 4: | |
233 | addr = simple_strtoul(argv[1], NULL, 16); | |
234 | boot_device = argv[2]; | |
235 | offset = simple_strtoul(argv[3], NULL, 16); | |
236 | break; | |
237 | default: | |
62c3ae7c | 238 | cmd_usage(cmdtp); |
fad63407 | 239 | show_boot_progress (-35); |
c609719b WD |
240 | return 1; |
241 | } | |
242 | ||
fad63407 | 243 | show_boot_progress (35); |
c609719b WD |
244 | if (!boot_device) { |
245 | puts ("\n** No boot device **\n"); | |
fad63407 | 246 | show_boot_progress (-36); |
c609719b WD |
247 | return 1; |
248 | } | |
fad63407 | 249 | show_boot_progress (36); |
c609719b WD |
250 | |
251 | dev = simple_strtoul(boot_device, &ep, 16); | |
252 | ||
6d0f6bcf | 253 | if ((dev >= CONFIG_SYS_MAX_DOC_DEVICE) || |
c609719b WD |
254 | (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN)) { |
255 | printf ("\n** Device %d not available\n", dev); | |
fad63407 | 256 | show_boot_progress (-37); |
c609719b WD |
257 | return 1; |
258 | } | |
fad63407 | 259 | show_boot_progress (37); |
c609719b WD |
260 | |
261 | printf ("\nLoading from device %d: %s at 0x%lX (offset 0x%lX)\n", | |
262 | dev, doc_dev_desc[dev].name, doc_dev_desc[dev].physadr, | |
263 | offset); | |
264 | ||
265 | if (doc_rw (doc_dev_desc + dev, 1, offset, | |
266 | SECTORSIZE, NULL, (u_char *)addr)) { | |
267 | printf ("** Read error on %d\n", dev); | |
fad63407 | 268 | show_boot_progress (-38); |
c609719b WD |
269 | return 1; |
270 | } | |
fad63407 | 271 | show_boot_progress (38); |
c609719b | 272 | |
9a4daad0 | 273 | switch (genimg_get_format ((void *)addr)) { |
d5934ad7 MB |
274 | case IMAGE_FORMAT_LEGACY: |
275 | hdr = (image_header_t *)addr; | |
c609719b | 276 | |
09475f75 | 277 | image_print_contents (hdr); |
c609719b | 278 | |
09475f75 | 279 | cnt = image_get_image_size (hdr); |
d5934ad7 MB |
280 | break; |
281 | #if defined(CONFIG_FIT) | |
282 | case IMAGE_FORMAT_FIT: | |
09475f75 | 283 | fit_hdr = (const void *)addr; |
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 */ | |
3bab76a2 MB |
307 | if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) { |
308 | if (!fit_check_format (fit_hdr)) { | |
309 | show_boot_progress (-130); | |
310 | puts ("** Bad FIT image format\n"); | |
311 | return 1; | |
312 | } | |
313 | show_boot_progress (131); | |
314 | fit_print_contents (fit_hdr); | |
315 | } | |
09475f75 MB |
316 | #endif |
317 | ||
c609719b WD |
318 | /* Loading ok, update default load address */ |
319 | ||
320 | load_addr = addr; | |
321 | ||
322 | /* Check if we should attempt an auto-start */ | |
323 | if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { | |
324 | char *local_args[2]; | |
325 | extern int do_bootm (cmd_tbl_t *, int, int, char *[]); | |
326 | ||
327 | local_args[0] = argv[0]; | |
328 | local_args[1] = NULL; | |
329 | ||
330 | printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); | |
331 | ||
332 | do_bootm (cmdtp, 0, 1, local_args); | |
333 | rcode = 1; | |
334 | } | |
335 | return rcode; | |
336 | } | |
337 | ||
0d498393 WD |
338 | U_BOOT_CMD( |
339 | docboot, 4, 1, do_docboot, | |
2fb2604d | 340 | "boot from DOC device", |
8bde7f77 WD |
341 | "loadAddr dev\n" |
342 | ); | |
343 | ||
c609719b WD |
344 | int doc_rw (struct DiskOnChip* this, int cmd, |
345 | loff_t from, size_t len, | |
346 | size_t * retlen, u_char * buf) | |
347 | { | |
348 | int noecc, ret = 0, n, total = 0; | |
349 | char eccbuf[6]; | |
350 | ||
351 | while(len) { | |
352 | /* The ECC will not be calculated correctly if | |
353 | less than 512 is written or read */ | |
354 | noecc = (from != (from | 0x1ff) + 1) || (len < 0x200); | |
355 | ||
356 | if (cmd) | |
357 | ret = doc_read_ecc(this, from, len, | |
77ddac94 WD |
358 | (size_t *)&n, (u_char*)buf, |
359 | noecc ? (uchar *)NULL : (uchar *)eccbuf); | |
c609719b WD |
360 | else |
361 | ret = doc_write_ecc(this, from, len, | |
77ddac94 WD |
362 | (size_t *)&n, (u_char*)buf, |
363 | noecc ? (uchar *)NULL : (uchar *)eccbuf); | |
c609719b WD |
364 | |
365 | if (ret) | |
366 | break; | |
367 | ||
368 | from += n; | |
369 | buf += n; | |
370 | total += n; | |
371 | len -= n; | |
372 | } | |
373 | ||
374 | if (retlen) | |
375 | *retlen = total; | |
376 | ||
377 | return ret; | |
378 | } | |
379 | ||
380 | void doc_print(struct DiskOnChip *this) { | |
381 | printf("%s at 0x%lX,\n" | |
382 | "\t %d chip%s %s, size %d MB, \n" | |
383 | "\t total size %ld MB, sector size %ld kB\n", | |
384 | this->name, this->physadr, this->numchips, | |
385 | this->numchips>1 ? "s" : "", this->chips_name, | |
386 | 1 << (this->chipshift - 20), | |
387 | this->totlen >> 20, this->erasesize >> 10); | |
388 | ||
389 | if (this->nftl_found) { | |
390 | struct NFTLrecord *nftl = &this->nftl; | |
391 | unsigned long bin_size, flash_size; | |
392 | ||
393 | bin_size = nftl->nb_boot_blocks * this->erasesize; | |
394 | flash_size = (nftl->nb_blocks - nftl->nb_boot_blocks) * this->erasesize; | |
395 | ||
396 | printf("\t NFTL boot record:\n" | |
397 | "\t Binary partition: size %ld%s\n" | |
398 | "\t Flash disk partition: size %ld%s, offset 0x%lx\n", | |
399 | bin_size > (1 << 20) ? bin_size >> 20 : bin_size >> 10, | |
400 | bin_size > (1 << 20) ? "MB" : "kB", | |
401 | flash_size > (1 << 20) ? flash_size >> 20 : flash_size >> 10, | |
402 | flash_size > (1 << 20) ? "MB" : "kB", bin_size); | |
403 | } else { | |
404 | puts ("\t No NFTL boot record found.\n"); | |
405 | } | |
406 | } | |
407 | ||
408 | /* ------------------------------------------------------------------------- */ | |
409 | ||
410 | /* This function is needed to avoid calls of the __ashrdi3 function. */ | |
411 | static int shr(int val, int shift) { | |
412 | return val >> shift; | |
413 | } | |
414 | ||
415 | /* Perform the required delay cycles by reading from the appropriate register */ | |
416 | static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) | |
417 | { | |
418 | volatile char dummy; | |
419 | int i; | |
420 | ||
421 | for (i = 0; i < cycles; i++) { | |
422 | if (DoC_is_Millennium(doc)) | |
423 | dummy = ReadDOC(doc->virtadr, NOP); | |
424 | else | |
425 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
426 | } | |
427 | ||
428 | } | |
429 | ||
430 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
431 | static int _DoC_WaitReady(struct DiskOnChip *doc) | |
432 | { | |
433 | unsigned long docptr = doc->virtadr; | |
434 | unsigned long start = get_timer(0); | |
435 | ||
436 | #ifdef PSYCHO_DEBUG | |
437 | puts ("_DoC_WaitReady called for out-of-line wait\n"); | |
438 | #endif | |
439 | ||
440 | /* Out-of-line routine to wait for chip response */ | |
441 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
6d0f6bcf | 442 | #ifdef CONFIG_SYS_DOC_SHORT_TIMEOUT |
c609719b WD |
443 | /* it seems that after a certain time the DoC deasserts |
444 | * the CDSN_CTRL_FR_B although it is not ready... | |
445 | * using a short timout solve this (timer increments every ms) */ | |
446 | if (get_timer(start) > 10) { | |
447 | return DOC_ETIMEOUT; | |
448 | } | |
449 | #else | |
450 | if (get_timer(start) > 10 * 1000) { | |
451 | puts ("_DoC_WaitReady timed out.\n"); | |
452 | return DOC_ETIMEOUT; | |
453 | } | |
454 | #endif | |
455 | udelay(1); | |
8bde7f77 | 456 | } |
c609719b WD |
457 | |
458 | return 0; | |
459 | } | |
460 | ||
461 | static int DoC_WaitReady(struct DiskOnChip *doc) | |
462 | { | |
463 | unsigned long docptr = doc->virtadr; | |
464 | /* This is inline, to optimise the common case, where it's ready instantly */ | |
465 | int ret = 0; | |
466 | ||
467 | /* 4 read form NOP register should be issued in prior to the read from CDSNControl | |
468 | see Software Requirement 11.4 item 2. */ | |
469 | DoC_Delay(doc, 4); | |
470 | ||
471 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
472 | /* Call the out-of-line routine to wait */ | |
473 | ret = _DoC_WaitReady(doc); | |
474 | ||
475 | /* issue 2 read from NOP register after reading from CDSNControl register | |
476 | see Software Requirement 11.4 item 2. */ | |
477 | DoC_Delay(doc, 2); | |
478 | ||
479 | return ret; | |
480 | } | |
481 | ||
482 | /* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to | |
483 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
484 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
485 | ||
486 | static inline int DoC_Command(struct DiskOnChip *doc, unsigned char command, | |
487 | unsigned char xtraflags) | |
488 | { | |
489 | unsigned long docptr = doc->virtadr; | |
490 | ||
491 | if (DoC_is_2000(doc)) | |
492 | xtraflags |= CDSN_CTRL_FLASH_IO; | |
493 | ||
494 | /* Assert the CLE (Command Latch Enable) line to the flash chip */ | |
495 | WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); | |
496 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
497 | ||
498 | if (DoC_is_Millennium(doc)) | |
499 | WriteDOC(command, docptr, CDSNSlowIO); | |
500 | ||
501 | /* Send the command */ | |
502 | WriteDOC_(command, docptr, doc->ioreg); | |
503 | ||
504 | /* Lower the CLE line */ | |
505 | WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); | |
506 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
507 | ||
508 | /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ | |
509 | return DoC_WaitReady(doc); | |
510 | } | |
511 | ||
512 | /* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to | |
513 | bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is | |
514 | required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ | |
515 | ||
516 | static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, | |
517 | unsigned char xtraflags1, unsigned char xtraflags2) | |
518 | { | |
519 | unsigned long docptr; | |
520 | int i; | |
521 | ||
522 | docptr = doc->virtadr; | |
523 | ||
524 | if (DoC_is_2000(doc)) | |
525 | xtraflags1 |= CDSN_CTRL_FLASH_IO; | |
526 | ||
527 | /* Assert the ALE (Address Latch Enable) line to the flash chip */ | |
528 | WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); | |
529 | ||
530 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
531 | ||
532 | /* Send the address */ | |
533 | /* Devices with 256-byte page are addressed as: | |
534 | Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) | |
535 | * there is no device on the market with page256 | |
536 | and more than 24 bits. | |
537 | Devices with 512-byte page are addressed as: | |
538 | Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) | |
539 | * 25-31 is sent only if the chip support it. | |
540 | * bit 8 changes the read command to be sent | |
541 | (NAND_CMD_READ0 or NAND_CMD_READ1). | |
542 | */ | |
543 | ||
544 | if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { | |
545 | if (DoC_is_Millennium(doc)) | |
546 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
547 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
548 | } | |
549 | ||
550 | if (doc->page256) { | |
551 | ofs = ofs >> 8; | |
552 | } else { | |
553 | ofs = ofs >> 9; | |
554 | } | |
555 | ||
556 | if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { | |
557 | for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { | |
558 | if (DoC_is_Millennium(doc)) | |
559 | WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); | |
560 | WriteDOC_(ofs & 0xff, docptr, doc->ioreg); | |
561 | } | |
562 | } | |
563 | ||
564 | DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ | |
565 | ||
566 | /* FIXME: The SlowIO's for millennium could be replaced by | |
567 | a single WritePipeTerm here. mf. */ | |
568 | ||
569 | /* Lower the ALE line */ | |
570 | WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, | |
571 | CDSNControl); | |
572 | ||
573 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
574 | ||
575 | /* Wait for the chip to respond - Software requirement 11.4.1 */ | |
576 | return DoC_WaitReady(doc); | |
577 | } | |
578 | ||
7152b1d0 | 579 | /* Read a buffer from DoC, taking care of Millennium oddities */ |
c609719b WD |
580 | static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) |
581 | { | |
582 | volatile int dummy; | |
583 | int modulus = 0xffff; | |
584 | unsigned long docptr; | |
585 | int i; | |
586 | ||
587 | docptr = doc->virtadr; | |
588 | ||
589 | if (len <= 0) | |
590 | return; | |
591 | ||
592 | if (DoC_is_Millennium(doc)) { | |
593 | /* Read the data via the internal pipeline through CDSN IO register, | |
594 | see Pipelined Read Operations 11.3 */ | |
595 | dummy = ReadDOC(docptr, ReadPipeInit); | |
596 | ||
597 | /* Millennium should use the LastDataRead register - Pipeline Reads */ | |
598 | len--; | |
599 | ||
600 | /* This is needed for correctly ECC calculation */ | |
601 | modulus = 0xff; | |
602 | } | |
603 | ||
604 | for (i = 0; i < len; i++) | |
605 | buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); | |
606 | ||
607 | if (DoC_is_Millennium(doc)) { | |
608 | buf[i] = ReadDOC(docptr, LastDataRead); | |
609 | } | |
610 | } | |
611 | ||
7152b1d0 | 612 | /* Write a buffer to DoC, taking care of Millennium oddities */ |
c609719b WD |
613 | static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) |
614 | { | |
615 | unsigned long docptr; | |
616 | int i; | |
617 | ||
618 | docptr = doc->virtadr; | |
619 | ||
620 | if (len <= 0) | |
621 | return; | |
622 | ||
623 | for (i = 0; i < len; i++) | |
624 | WriteDOC_(buf[i], docptr, doc->ioreg + i); | |
625 | ||
626 | if (DoC_is_Millennium(doc)) { | |
627 | WriteDOC(0x00, docptr, WritePipeTerm); | |
628 | } | |
629 | } | |
630 | ||
631 | ||
632 | /* DoC_SelectChip: Select a given flash chip within the current floor */ | |
633 | ||
634 | static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) | |
635 | { | |
636 | unsigned long docptr = doc->virtadr; | |
637 | ||
638 | /* Software requirement 11.4.4 before writing DeviceSelect */ | |
639 | /* Deassert the CE line to eliminate glitches on the FCE# outputs */ | |
640 | WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); | |
641 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
642 | ||
643 | /* Select the individual flash chip requested */ | |
644 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
645 | DoC_Delay(doc, 4); | |
646 | ||
647 | /* Reassert the CE line */ | |
648 | WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, | |
649 | CDSNControl); | |
650 | DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ | |
651 | ||
652 | /* Wait for it to be ready */ | |
653 | return DoC_WaitReady(doc); | |
654 | } | |
655 | ||
656 | /* DoC_SelectFloor: Select a given floor (bank of flash chips) */ | |
657 | ||
658 | static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) | |
659 | { | |
660 | unsigned long docptr = doc->virtadr; | |
661 | ||
662 | /* Select the floor (bank) of chips required */ | |
663 | WriteDOC(floor, docptr, FloorSelect); | |
664 | ||
665 | /* Wait for the chip to be ready */ | |
666 | return DoC_WaitReady(doc); | |
667 | } | |
668 | ||
669 | /* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ | |
670 | ||
671 | static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) | |
672 | { | |
673 | int mfr, id, i; | |
674 | volatile char dummy; | |
675 | ||
676 | /* Page in the required floor/chip */ | |
677 | DoC_SelectFloor(doc, floor); | |
678 | DoC_SelectChip(doc, chip); | |
679 | ||
680 | /* Reset the chip */ | |
681 | if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { | |
682 | #ifdef DOC_DEBUG | |
683 | printf("DoC_Command (reset) for %d,%d returned true\n", | |
684 | floor, chip); | |
685 | #endif | |
686 | return 0; | |
687 | } | |
688 | ||
689 | ||
690 | /* Read the NAND chip ID: 1. Send ReadID command */ | |
691 | if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { | |
692 | #ifdef DOC_DEBUG | |
693 | printf("DoC_Command (ReadID) for %d,%d returned true\n", | |
694 | floor, chip); | |
695 | #endif | |
696 | return 0; | |
697 | } | |
698 | ||
699 | /* Read the NAND chip ID: 2. Send address byte zero */ | |
700 | DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); | |
701 | ||
702 | /* Read the manufacturer and device id codes from the device */ | |
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 | mfr = ReadDOC_(doc->virtadr, doc->ioreg); | |
708 | ||
709 | /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ | |
710 | dummy = ReadDOC(doc->virtadr, CDSNSlowIO); | |
711 | DoC_Delay(doc, 2); | |
712 | id = ReadDOC_(doc->virtadr, doc->ioreg); | |
713 | ||
714 | /* No response - return failure */ | |
715 | if (mfr == 0xff || mfr == 0) | |
716 | return 0; | |
717 | ||
718 | /* Check it's the same as the first chip we identified. | |
719 | * M-Systems say that any given DiskOnChip device should only | |
720 | * contain _one_ type of flash part, although that's not a | |
721 | * hardware restriction. */ | |
722 | if (doc->mfr) { | |
723 | if (doc->mfr == mfr && doc->id == id) | |
724 | return 1; /* This is another the same the first */ | |
725 | else | |
726 | printf("Flash chip at floor %d, chip %d is different:\n", | |
727 | floor, chip); | |
728 | } | |
729 | ||
730 | /* Print and store the manufacturer and ID codes. */ | |
731 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
732 | if (mfr == nand_flash_ids[i].manufacture_id && | |
733 | id == nand_flash_ids[i].model_id) { | |
734 | #ifdef DOC_DEBUG | |
735 | printf("Flash chip found: Manufacturer ID: %2.2X, " | |
736 | "Chip ID: %2.2X (%s)\n", mfr, id, | |
737 | nand_flash_ids[i].name); | |
738 | #endif | |
739 | if (!doc->mfr) { | |
740 | doc->mfr = mfr; | |
741 | doc->id = id; | |
742 | doc->chipshift = | |
743 | nand_flash_ids[i].chipshift; | |
744 | doc->page256 = nand_flash_ids[i].page256; | |
745 | doc->pageadrlen = | |
746 | nand_flash_ids[i].pageadrlen; | |
747 | doc->erasesize = | |
748 | nand_flash_ids[i].erasesize; | |
749 | doc->chips_name = | |
750 | nand_flash_ids[i].name; | |
751 | return 1; | |
752 | } | |
753 | return 0; | |
754 | } | |
755 | } | |
756 | ||
757 | ||
758 | #ifdef DOC_DEBUG | |
759 | /* We haven't fully identified the chip. Print as much as we know. */ | |
760 | printf("Unknown flash chip found: %2.2X %2.2X\n", | |
761 | id, mfr); | |
762 | #endif | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
767 | /* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ | |
768 | ||
769 | static void DoC_ScanChips(struct DiskOnChip *this) | |
770 | { | |
771 | int floor, chip; | |
772 | int numchips[MAX_FLOORS]; | |
773 | int maxchips = MAX_CHIPS; | |
774 | int ret = 1; | |
775 | ||
776 | this->numchips = 0; | |
777 | this->mfr = 0; | |
778 | this->id = 0; | |
779 | ||
780 | if (DoC_is_Millennium(this)) | |
781 | maxchips = MAX_CHIPS_MIL; | |
782 | ||
783 | /* For each floor, find the number of valid chips it contains */ | |
784 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
785 | ret = 1; | |
786 | numchips[floor] = 0; | |
787 | for (chip = 0; chip < maxchips && ret != 0; chip++) { | |
788 | ||
789 | ret = DoC_IdentChip(this, floor, chip); | |
790 | if (ret) { | |
791 | numchips[floor]++; | |
792 | this->numchips++; | |
793 | } | |
794 | } | |
795 | } | |
796 | ||
797 | /* If there are none at all that we recognise, bail */ | |
798 | if (!this->numchips) { | |
799 | puts ("No flash chips recognised.\n"); | |
800 | return; | |
801 | } | |
802 | ||
803 | /* Allocate an array to hold the information for each chip */ | |
804 | this->chips = malloc(sizeof(struct Nand) * this->numchips); | |
805 | if (!this->chips) { | |
806 | puts ("No memory for allocating chip info structures\n"); | |
807 | return; | |
808 | } | |
809 | ||
810 | ret = 0; | |
811 | ||
812 | /* Fill out the chip array with {floor, chipno} for each | |
813 | * detected chip in the device. */ | |
814 | for (floor = 0; floor < MAX_FLOORS; floor++) { | |
815 | for (chip = 0; chip < numchips[floor]; chip++) { | |
816 | this->chips[ret].floor = floor; | |
817 | this->chips[ret].chip = chip; | |
818 | this->chips[ret].curadr = 0; | |
819 | this->chips[ret].curmode = 0x50; | |
820 | ret++; | |
821 | } | |
822 | } | |
823 | ||
824 | /* Calculate and print the total size of the device */ | |
825 | this->totlen = this->numchips * (1 << this->chipshift); | |
826 | ||
827 | #ifdef DOC_DEBUG | |
828 | printf("%d flash chips found. Total DiskOnChip size: %ld MB\n", | |
829 | this->numchips, this->totlen >> 20); | |
830 | #endif | |
831 | } | |
832 | ||
833 | /* find_boot_record: Find the NFTL Media Header and its Spare copy which contains the | |
834 | * various device information of the NFTL partition and Bad Unit Table. Update | |
835 | * the ReplUnitTable[] table accroding to the Bad Unit Table. ReplUnitTable[] | |
836 | * is used for management of Erase Unit in other routines in nftl.c and nftlmount.c | |
837 | */ | |
838 | static int find_boot_record(struct NFTLrecord *nftl) | |
839 | { | |
840 | struct nftl_uci1 h1; | |
841 | struct nftl_oob oob; | |
842 | unsigned int block, boot_record_count = 0; | |
843 | int retlen; | |
844 | u8 buf[SECTORSIZE]; | |
845 | struct NFTLMediaHeader *mh = &nftl->MediaHdr; | |
846 | unsigned int i; | |
847 | ||
848 | nftl->MediaUnit = BLOCK_NIL; | |
849 | nftl->SpareMediaUnit = BLOCK_NIL; | |
850 | ||
851 | /* search for a valid boot record */ | |
852 | for (block = 0; block < nftl->nb_blocks; block++) { | |
853 | int ret; | |
854 | ||
855 | /* Check for ANAND header first. Then can whinge if it's found but later | |
856 | checks fail */ | |
857 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize, SECTORSIZE, | |
77ddac94 | 858 | (size_t *)&retlen, buf, NULL))) { |
c609719b WD |
859 | static int warncount = 5; |
860 | ||
861 | if (warncount) { | |
862 | printf("Block read at 0x%x failed\n", block * nftl->EraseSize); | |
863 | if (!--warncount) | |
864 | puts ("Further failures for this block will not be printed\n"); | |
865 | } | |
866 | continue; | |
867 | } | |
868 | ||
869 | if (retlen < 6 || memcmp(buf, "ANAND", 6)) { | |
870 | /* ANAND\0 not found. Continue */ | |
871 | #ifdef PSYCHO_DEBUG | |
872 | printf("ANAND header not found at 0x%x\n", block * nftl->EraseSize); | |
873 | #endif | |
874 | continue; | |
875 | } | |
876 | ||
877 | #ifdef NFTL_DEBUG | |
878 | printf("ANAND header found at 0x%x\n", block * nftl->EraseSize); | |
879 | #endif | |
880 | ||
881 | /* To be safer with BIOS, also use erase mark as discriminant */ | |
882 | if ((ret = doc_read_oob(nftl->mtd, block * nftl->EraseSize + SECTORSIZE + 8, | |
77ddac94 | 883 | 8, (size_t *)&retlen, (uchar *)&h1) < 0)) { |
c609719b WD |
884 | #ifdef NFTL_DEBUG |
885 | printf("ANAND header found at 0x%x, but OOB data read failed\n", | |
886 | block * nftl->EraseSize); | |
887 | #endif | |
888 | continue; | |
889 | } | |
890 | ||
891 | /* OK, we like it. */ | |
892 | ||
893 | if (boot_record_count) { | |
894 | /* We've already processed one. So we just check if | |
895 | this one is the same as the first one we found */ | |
896 | if (memcmp(mh, buf, sizeof(struct NFTLMediaHeader))) { | |
897 | #ifdef NFTL_DEBUG | |
898 | printf("NFTL Media Headers at 0x%x and 0x%x disagree.\n", | |
899 | nftl->MediaUnit * nftl->EraseSize, block * nftl->EraseSize); | |
900 | #endif | |
901 | /* if (debug) Print both side by side */ | |
902 | return -1; | |
903 | } | |
904 | if (boot_record_count == 1) | |
905 | nftl->SpareMediaUnit = block; | |
906 | ||
907 | boot_record_count++; | |
908 | continue; | |
909 | } | |
910 | ||
911 | /* This is the first we've seen. Copy the media header structure into place */ | |
912 | memcpy(mh, buf, sizeof(struct NFTLMediaHeader)); | |
913 | ||
914 | /* Do some sanity checks on it */ | |
7205e407 WD |
915 | if (mh->UnitSizeFactor == 0) { |
916 | #ifdef NFTL_DEBUG | |
917 | puts ("UnitSizeFactor 0x00 detected.\n" | |
918 | "This violates the spec but we think we know what it means...\n"); | |
919 | #endif | |
920 | } else if (mh->UnitSizeFactor != 0xff) { | |
921 | printf ("Sorry, we don't support UnitSizeFactor " | |
c609719b WD |
922 | "of != 1 yet.\n"); |
923 | return -1; | |
924 | } | |
925 | ||
926 | nftl->nb_boot_blocks = le16_to_cpu(mh->FirstPhysicalEUN); | |
927 | if ((nftl->nb_boot_blocks + 2) >= nftl->nb_blocks) { | |
928 | printf ("NFTL Media Header sanity check failed:\n" | |
929 | "nb_boot_blocks (%d) + 2 > nb_blocks (%d)\n", | |
930 | nftl->nb_boot_blocks, nftl->nb_blocks); | |
931 | return -1; | |
932 | } | |
933 | ||
934 | nftl->numvunits = le32_to_cpu(mh->FormattedSize) / nftl->EraseSize; | |
935 | if (nftl->numvunits > (nftl->nb_blocks - nftl->nb_boot_blocks - 2)) { | |
936 | printf ("NFTL Media Header sanity check failed:\n" | |
937 | "numvunits (%d) > nb_blocks (%d) - nb_boot_blocks(%d) - 2\n", | |
938 | nftl->numvunits, | |
939 | nftl->nb_blocks, | |
940 | nftl->nb_boot_blocks); | |
941 | return -1; | |
942 | } | |
943 | ||
944 | nftl->nr_sects = nftl->numvunits * (nftl->EraseSize / SECTORSIZE); | |
945 | ||
946 | /* If we're not using the last sectors in the device for some reason, | |
947 | reduce nb_blocks accordingly so we forget they're there */ | |
948 | nftl->nb_blocks = le16_to_cpu(mh->NumEraseUnits) + le16_to_cpu(mh->FirstPhysicalEUN); | |
949 | ||
950 | /* read the Bad Erase Unit Table and modify ReplUnitTable[] accordingly */ | |
951 | for (i = 0; i < nftl->nb_blocks; i++) { | |
952 | if ((i & (SECTORSIZE - 1)) == 0) { | |
953 | /* read one sector for every SECTORSIZE of blocks */ | |
954 | if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize + | |
955 | i + SECTORSIZE, SECTORSIZE, | |
77ddac94 | 956 | (size_t *)&retlen, buf, (uchar *)&oob)) < 0) { |
c609719b WD |
957 | puts ("Read of bad sector table failed\n"); |
958 | return -1; | |
959 | } | |
960 | } | |
961 | /* mark the Bad Erase Unit as RESERVED in ReplUnitTable */ | |
962 | if (buf[i & (SECTORSIZE - 1)] != 0xff) | |
963 | nftl->ReplUnitTable[i] = BLOCK_RESERVED; | |
964 | } | |
965 | ||
966 | nftl->MediaUnit = block; | |
967 | boot_record_count++; | |
968 | ||
969 | } /* foreach (block) */ | |
970 | ||
971 | return boot_record_count?0:-1; | |
972 | } | |
973 | ||
974 | /* This routine is made available to other mtd code via | |
975 | * inter_module_register. It must only be accessed through | |
976 | * inter_module_get which will bump the use count of this module. The | |
977 | * addresses passed back in mtd are valid as long as the use count of | |
978 | * this module is non-zero, i.e. between inter_module_get and | |
979 | * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000. | |
980 | */ | |
981 | static void DoC2k_init(struct DiskOnChip* this) | |
982 | { | |
983 | struct NFTLrecord *nftl; | |
984 | ||
985 | switch (this->ChipID) { | |
986 | case DOC_ChipID_Doc2k: | |
987 | this->name = "DiskOnChip 2000"; | |
988 | this->ioreg = DoC_2k_CDSN_IO; | |
989 | break; | |
990 | case DOC_ChipID_DocMil: | |
991 | this->name = "DiskOnChip Millennium"; | |
992 | this->ioreg = DoC_Mil_CDSN_IO; | |
993 | break; | |
994 | } | |
995 | ||
996 | #ifdef DOC_DEBUG | |
997 | printf("%s found at address 0x%lX\n", this->name, | |
998 | this->physadr); | |
999 | #endif | |
1000 | ||
1001 | this->totlen = 0; | |
1002 | this->numchips = 0; | |
1003 | ||
1004 | this->curfloor = -1; | |
1005 | this->curchip = -1; | |
1006 | ||
1007 | /* Ident all the chips present. */ | |
1008 | DoC_ScanChips(this); | |
7205e407 WD |
1009 | if ((!this->numchips) || (!this->chips)) |
1010 | return; | |
c609719b WD |
1011 | |
1012 | nftl = &this->nftl; | |
1013 | ||
1014 | /* Get physical parameters */ | |
1015 | nftl->EraseSize = this->erasesize; | |
8bde7f77 | 1016 | nftl->nb_blocks = this->totlen / this->erasesize; |
c609719b WD |
1017 | nftl->mtd = this; |
1018 | ||
1019 | if (find_boot_record(nftl) != 0) | |
1020 | this->nftl_found = 0; | |
1021 | else | |
1022 | this->nftl_found = 1; | |
1023 | ||
1024 | printf("%s @ 0x%lX, %ld MB\n", this->name, this->physadr, this->totlen >> 20); | |
1025 | } | |
1026 | ||
1027 | int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len, | |
1028 | size_t * retlen, u_char * buf, u_char * eccbuf) | |
1029 | { | |
1030 | unsigned long docptr; | |
1031 | struct Nand *mychip; | |
1032 | unsigned char syndrome[6]; | |
1033 | volatile char dummy; | |
1034 | int i, len256 = 0, ret=0; | |
1035 | ||
1036 | docptr = this->virtadr; | |
1037 | ||
1038 | /* Don't allow read past end of device */ | |
1039 | if (from >= this->totlen) { | |
1040 | puts ("Out of flash\n"); | |
1041 | return DOC_EINVAL; | |
1042 | } | |
1043 | ||
1044 | /* Don't allow a single read to cross a 512-byte block boundary */ | |
1045 | if (from + len > ((from | 0x1ff) + 1)) | |
1046 | len = ((from | 0x1ff) + 1) - from; | |
1047 | ||
1048 | /* The ECC will not be calculated correctly if less than 512 is read */ | |
1049 | if (len != 0x200 && eccbuf) | |
1050 | printf("ECC needs a full sector read (adr: %lx size %lx)\n", | |
1051 | (long) from, (long) len); | |
1052 | ||
7152b1d0 | 1053 | #ifdef PSYCHO_DEBUG |
c609719b WD |
1054 | printf("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); |
1055 | #endif | |
1056 | ||
1057 | /* Find the chip which is to be used and select it */ | |
1058 | mychip = &this->chips[shr(from, this->chipshift)]; | |
1059 | ||
1060 | if (this->curfloor != mychip->floor) { | |
1061 | DoC_SelectFloor(this, mychip->floor); | |
1062 | DoC_SelectChip(this, mychip->chip); | |
1063 | } else if (this->curchip != mychip->chip) { | |
1064 | DoC_SelectChip(this, mychip->chip); | |
1065 | } | |
1066 | ||
1067 | this->curfloor = mychip->floor; | |
1068 | this->curchip = mychip->chip; | |
1069 | ||
1070 | DoC_Command(this, | |
1071 | (!this->page256 | |
1072 | && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1073 | CDSN_CTRL_WP); | |
1074 | DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, | |
1075 | CDSN_CTRL_ECC_IO); | |
1076 | ||
1077 | if (eccbuf) { | |
1078 | /* Prime the ECC engine */ | |
1079 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1080 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
1081 | } else { | |
1082 | /* disable the ECC engine */ | |
1083 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1084 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1085 | } | |
1086 | ||
1087 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1088 | if (this->page256 && from + len > (from | 0xff) + 1) { | |
1089 | len256 = (from | 0xff) + 1 - from; | |
1090 | DoC_ReadBuf(this, buf, len256); | |
1091 | ||
1092 | DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); | |
1093 | DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, | |
1094 | CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); | |
1095 | } | |
1096 | ||
1097 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1098 | ||
1099 | /* Let the caller know we completed it */ | |
1100 | *retlen = len; | |
1101 | ||
1102 | if (eccbuf) { | |
1103 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1104 | /* Note: this will work even with 2M x 8bit devices as */ | |
1105 | /* they have 8 bytes of OOB per 256 page. mf. */ | |
1106 | DoC_ReadBuf(this, eccbuf, 6); | |
1107 | ||
1108 | /* Flush the pipeline */ | |
1109 | if (DoC_is_Millennium(this)) { | |
1110 | dummy = ReadDOC(docptr, ECCConf); | |
1111 | dummy = ReadDOC(docptr, ECCConf); | |
1112 | i = ReadDOC(docptr, ECCConf); | |
1113 | } else { | |
1114 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1115 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1116 | i = ReadDOC(docptr, 2k_ECCStatus); | |
1117 | } | |
1118 | ||
1119 | /* Check the ECC Status */ | |
1120 | if (i & 0x80) { | |
1121 | int nb_errors; | |
1122 | /* There was an ECC error */ | |
1123 | #ifdef ECC_DEBUG | |
1124 | printf("DiskOnChip ECC Error: Read at %lx\n", (long)from); | |
1125 | #endif | |
1126 | /* Read the ECC syndrom through the DiskOnChip ECC logic. | |
1127 | These syndrome will be all ZERO when there is no error */ | |
1128 | for (i = 0; i < 6; i++) { | |
1129 | syndrome[i] = | |
1130 | ReadDOC(docptr, ECCSyndrome0 + i); | |
1131 | } | |
8bde7f77 | 1132 | nb_errors = doc_decode_ecc(buf, syndrome); |
c609719b WD |
1133 | |
1134 | #ifdef ECC_DEBUG | |
1135 | printf("Errors corrected: %x\n", nb_errors); | |
1136 | #endif | |
8bde7f77 | 1137 | if (nb_errors < 0) { |
c609719b WD |
1138 | /* We return error, but have actually done the read. Not that |
1139 | this can be told to user-space, via sys_read(), but at least | |
1140 | MTD-aware stuff can know about it by checking *retlen */ | |
1141 | printf("ECC Errors at %lx\n", (long)from); | |
1142 | ret = DOC_EECC; | |
8bde7f77 | 1143 | } |
c609719b WD |
1144 | } |
1145 | ||
1146 | #ifdef PSYCHO_DEBUG | |
1147 | printf("ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1148 | (long)from, eccbuf[0], eccbuf[1], eccbuf[2], | |
1149 | eccbuf[3], eccbuf[4], eccbuf[5]); | |
1150 | #endif | |
1151 | ||
1152 | /* disable the ECC engine */ | |
1153 | WriteDOC(DOC_ECC_DIS, docptr , ECCConf); | |
1154 | } | |
1155 | ||
1156 | /* according to 11.4.1, we need to wait for the busy line | |
8bde7f77 | 1157 | * drop if we read to the end of the page. */ |
c609719b WD |
1158 | if(0 == ((from + *retlen) & 0x1ff)) |
1159 | { | |
1160 | DoC_WaitReady(this); | |
1161 | } | |
1162 | ||
1163 | return ret; | |
1164 | } | |
1165 | ||
1166 | int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len, | |
1167 | size_t * retlen, const u_char * buf, | |
1168 | u_char * eccbuf) | |
1169 | { | |
1170 | int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ | |
1171 | unsigned long docptr; | |
1172 | volatile char dummy; | |
1173 | int len256 = 0; | |
1174 | struct Nand *mychip; | |
1175 | ||
1176 | docptr = this->virtadr; | |
1177 | ||
1178 | /* Don't allow write past end of device */ | |
1179 | if (to >= this->totlen) { | |
1180 | puts ("Out of flash\n"); | |
1181 | return DOC_EINVAL; | |
1182 | } | |
1183 | ||
1184 | /* Don't allow a single write to cross a 512-byte block boundary */ | |
1185 | if (to + len > ((to | 0x1ff) + 1)) | |
1186 | len = ((to | 0x1ff) + 1) - to; | |
1187 | ||
1188 | /* The ECC will not be calculated correctly if less than 512 is written */ | |
1189 | if (len != 0x200 && eccbuf) | |
1190 | printf("ECC needs a full sector write (adr: %lx size %lx)\n", | |
1191 | (long) to, (long) len); | |
1192 | ||
1193 | /* printf("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ | |
1194 | ||
1195 | /* Find the chip which is to be used and select it */ | |
1196 | mychip = &this->chips[shr(to, this->chipshift)]; | |
1197 | ||
1198 | if (this->curfloor != mychip->floor) { | |
1199 | DoC_SelectFloor(this, mychip->floor); | |
1200 | DoC_SelectChip(this, mychip->chip); | |
1201 | } else if (this->curchip != mychip->chip) { | |
1202 | DoC_SelectChip(this, mychip->chip); | |
1203 | } | |
1204 | ||
1205 | this->curfloor = mychip->floor; | |
1206 | this->curchip = mychip->chip; | |
1207 | ||
1208 | /* Set device to main plane of flash */ | |
1209 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1210 | DoC_Command(this, | |
1211 | (!this->page256 | |
1212 | && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, | |
1213 | CDSN_CTRL_WP); | |
1214 | ||
1215 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1216 | DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); | |
1217 | ||
1218 | if (eccbuf) { | |
1219 | /* Prime the ECC engine */ | |
1220 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1221 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
1222 | } else { | |
1223 | /* disable the ECC engine */ | |
1224 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
1225 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1226 | } | |
1227 | ||
1228 | /* treat crossing 256-byte sector for 2M x 8bits devices */ | |
1229 | if (this->page256 && to + len > (to | 0xff) + 1) { | |
1230 | len256 = (to | 0xff) + 1 - to; | |
1231 | DoC_WriteBuf(this, buf, len256); | |
1232 | ||
1233 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1234 | ||
1235 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1236 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1237 | ||
1238 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1239 | DoC_Delay(this, 2); | |
1240 | ||
1241 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1242 | puts ("Error programming flash\n"); | |
1243 | /* Error in programming */ | |
1244 | *retlen = 0; | |
1245 | return DOC_EIO; | |
1246 | } | |
1247 | ||
1248 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1249 | DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, | |
1250 | CDSN_CTRL_ECC_IO); | |
1251 | } | |
1252 | ||
1253 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1254 | ||
1255 | if (eccbuf) { | |
1256 | WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, | |
1257 | CDSNControl); | |
1258 | ||
1259 | if (DoC_is_Millennium(this)) { | |
1260 | WriteDOC(0, docptr, NOP); | |
1261 | WriteDOC(0, docptr, NOP); | |
1262 | WriteDOC(0, docptr, NOP); | |
1263 | } else { | |
1264 | WriteDOC_(0, docptr, this->ioreg); | |
1265 | WriteDOC_(0, docptr, this->ioreg); | |
1266 | WriteDOC_(0, docptr, this->ioreg); | |
1267 | } | |
1268 | ||
1269 | /* Read the ECC data through the DiskOnChip ECC logic */ | |
1270 | for (di = 0; di < 6; di++) { | |
1271 | eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); | |
1272 | } | |
1273 | ||
1274 | /* Reset the ECC engine */ | |
1275 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1276 | ||
1277 | #ifdef PSYCHO_DEBUG | |
1278 | printf | |
1279 | ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", | |
1280 | (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], | |
1281 | eccbuf[4], eccbuf[5]); | |
1282 | #endif | |
1283 | } | |
1284 | ||
1285 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1286 | ||
1287 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1288 | /* There's an implicit DoC_WaitReady() in DoC_Command */ | |
1289 | ||
1290 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1291 | DoC_Delay(this, 2); | |
1292 | ||
1293 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1294 | puts ("Error programming flash\n"); | |
1295 | /* Error in programming */ | |
1296 | *retlen = 0; | |
1297 | return DOC_EIO; | |
1298 | } | |
1299 | ||
1300 | /* Let the caller know we completed it */ | |
1301 | *retlen = len; | |
1302 | ||
1303 | if (eccbuf) { | |
1304 | unsigned char x[8]; | |
1305 | size_t dummy; | |
1306 | int ret; | |
1307 | ||
1308 | /* Write the ECC data to flash */ | |
1309 | for (di=0; di<6; di++) | |
1310 | x[di] = eccbuf[di]; | |
1311 | ||
1312 | x[6]=0x55; | |
1313 | x[7]=0x55; | |
1314 | ||
1315 | ret = doc_write_oob(this, to, 8, &dummy, x); | |
1316 | return ret; | |
1317 | } | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1322 | size_t * retlen, u_char * buf) | |
1323 | { | |
1324 | int len256 = 0, ret; | |
1325 | unsigned long docptr; | |
1326 | struct Nand *mychip; | |
1327 | ||
1328 | docptr = this->virtadr; | |
1329 | ||
1330 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1331 | ||
1332 | if (this->curfloor != mychip->floor) { | |
1333 | DoC_SelectFloor(this, mychip->floor); | |
1334 | DoC_SelectChip(this, mychip->chip); | |
1335 | } else if (this->curchip != mychip->chip) { | |
1336 | DoC_SelectChip(this, mychip->chip); | |
1337 | } | |
1338 | this->curfloor = mychip->floor; | |
1339 | this->curchip = mychip->chip; | |
1340 | ||
1341 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1342 | /* page to maintain compatibility with doc_read_ecc. */ | |
1343 | if (this->page256) { | |
1344 | if (!(ofs & 0x8)) | |
1345 | ofs += 0x100; | |
1346 | else | |
1347 | ofs -= 0x8; | |
1348 | } | |
1349 | ||
1350 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1351 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); | |
1352 | ||
1353 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1354 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1355 | /* next OOB block, but it didn't work here. mf. */ | |
1356 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1357 | len256 = (ofs | 0x7) + 1 - ofs; | |
1358 | DoC_ReadBuf(this, buf, len256); | |
1359 | ||
1360 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1361 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), | |
1362 | CDSN_CTRL_WP, 0); | |
1363 | } | |
1364 | ||
1365 | DoC_ReadBuf(this, &buf[len256], len - len256); | |
1366 | ||
1367 | *retlen = len; | |
1368 | /* Reading the full OOB data drops us off of the end of the page, | |
8bde7f77 WD |
1369 | * causing the flash device to go into busy mode, so we need |
1370 | * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ | |
c609719b WD |
1371 | |
1372 | ret = DoC_WaitReady(this); | |
1373 | ||
1374 | return ret; | |
1375 | ||
1376 | } | |
1377 | ||
1378 | int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len, | |
1379 | size_t * retlen, const u_char * buf) | |
1380 | { | |
1381 | int len256 = 0; | |
1382 | unsigned long docptr = this->virtadr; | |
1383 | struct Nand *mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1384 | volatile int dummy; | |
1385 | ||
1386 | #ifdef PSYCHO_DEBUG | |
1387 | printf("doc_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n", | |
1388 | (long)ofs, len, buf[0], buf[1], buf[2], buf[3], | |
1389 | buf[8], buf[9], buf[14],buf[15]); | |
1390 | #endif | |
1391 | ||
1392 | /* Find the chip which is to be used and select it */ | |
1393 | if (this->curfloor != mychip->floor) { | |
1394 | DoC_SelectFloor(this, mychip->floor); | |
1395 | DoC_SelectChip(this, mychip->chip); | |
1396 | } else if (this->curchip != mychip->chip) { | |
1397 | DoC_SelectChip(this, mychip->chip); | |
1398 | } | |
1399 | this->curfloor = mychip->floor; | |
1400 | this->curchip = mychip->chip; | |
1401 | ||
1402 | /* disable the ECC engine */ | |
1403 | WriteDOC (DOC_ECC_RESET, docptr, ECCConf); | |
1404 | WriteDOC (DOC_ECC_DIS, docptr, ECCConf); | |
1405 | ||
1406 | /* Reset the chip, see Software Requirement 11.4 item 1. */ | |
1407 | DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); | |
1408 | ||
1409 | /* issue the Read2 command to set the pointer to the Spare Data Area. */ | |
1410 | DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); | |
1411 | ||
1412 | /* update address for 2M x 8bit devices. OOB starts on the second */ | |
1413 | /* page to maintain compatibility with doc_read_ecc. */ | |
1414 | if (this->page256) { | |
1415 | if (!(ofs & 0x8)) | |
1416 | ofs += 0x100; | |
1417 | else | |
1418 | ofs -= 0x8; | |
1419 | } | |
1420 | ||
1421 | /* issue the Serial Data In command to initial the Page Program process */ | |
1422 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1423 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); | |
1424 | ||
1425 | /* treat crossing 8-byte OOB data for 2M x 8bit devices */ | |
1426 | /* Note: datasheet says it should automaticaly wrap to the */ | |
1427 | /* next OOB block, but it didn't work here. mf. */ | |
1428 | if (this->page256 && ofs + len > (ofs | 0x7) + 1) { | |
1429 | len256 = (ofs | 0x7) + 1 - ofs; | |
1430 | DoC_WriteBuf(this, buf, len256); | |
1431 | ||
1432 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1433 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1434 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1435 | ||
1436 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1437 | DoC_Delay(this, 2); | |
1438 | ||
1439 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1440 | puts ("Error programming oob data\n"); | |
1441 | /* There was an error */ | |
1442 | *retlen = 0; | |
1443 | return DOC_EIO; | |
1444 | } | |
1445 | DoC_Command(this, NAND_CMD_SEQIN, 0); | |
1446 | DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); | |
1447 | } | |
1448 | ||
1449 | DoC_WriteBuf(this, &buf[len256], len - len256); | |
1450 | ||
1451 | DoC_Command(this, NAND_CMD_PAGEPROG, 0); | |
1452 | DoC_Command(this, NAND_CMD_STATUS, 0); | |
1453 | /* DoC_WaitReady() is implicit in DoC_Command */ | |
1454 | ||
1455 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1456 | DoC_Delay(this, 2); | |
1457 | ||
1458 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1459 | puts ("Error programming oob data\n"); | |
1460 | /* There was an error */ | |
1461 | *retlen = 0; | |
1462 | return DOC_EIO; | |
1463 | } | |
1464 | ||
1465 | *retlen = len; | |
1466 | return 0; | |
1467 | ||
1468 | } | |
1469 | ||
1470 | int doc_erase(struct DiskOnChip* this, loff_t ofs, size_t len) | |
1471 | { | |
1472 | volatile int dummy; | |
1473 | unsigned long docptr; | |
1474 | struct Nand *mychip; | |
1475 | ||
1476 | if (ofs & (this->erasesize-1) || len & (this->erasesize-1)) { | |
1477 | puts ("Offset and size must be sector aligned\n"); | |
1478 | return DOC_EINVAL; | |
1479 | } | |
1480 | ||
1481 | docptr = this->virtadr; | |
1482 | ||
1483 | /* FIXME: Do this in the background. Use timers or schedule_task() */ | |
1484 | while(len) { | |
1485 | mychip = &this->chips[shr(ofs, this->chipshift)]; | |
1486 | ||
1487 | if (this->curfloor != mychip->floor) { | |
1488 | DoC_SelectFloor(this, mychip->floor); | |
1489 | DoC_SelectChip(this, mychip->chip); | |
1490 | } else if (this->curchip != mychip->chip) { | |
1491 | DoC_SelectChip(this, mychip->chip); | |
1492 | } | |
1493 | this->curfloor = mychip->floor; | |
1494 | this->curchip = mychip->chip; | |
1495 | ||
1496 | DoC_Command(this, NAND_CMD_ERASE1, 0); | |
1497 | DoC_Address(this, ADDR_PAGE, ofs, 0, 0); | |
1498 | DoC_Command(this, NAND_CMD_ERASE2, 0); | |
1499 | ||
1500 | DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); | |
1501 | ||
1502 | dummy = ReadDOC(docptr, CDSNSlowIO); | |
1503 | DoC_Delay(this, 2); | |
1504 | ||
1505 | if (ReadDOC_(docptr, this->ioreg) & 1) { | |
1506 | printf("Error erasing at 0x%lx\n", (long)ofs); | |
1507 | /* There was an error */ | |
1508 | goto callback; | |
1509 | } | |
1510 | ofs += this->erasesize; | |
1511 | len -= this->erasesize; | |
1512 | } | |
1513 | ||
1514 | callback: | |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static inline int doccheck(unsigned long potential, unsigned long physadr) | |
1519 | { | |
1520 | unsigned long window=potential; | |
1521 | unsigned char tmp, ChipID; | |
1522 | #ifndef DOC_PASSIVE_PROBE | |
1523 | unsigned char tmp2; | |
1524 | #endif | |
1525 | ||
1526 | /* Routine copied from the Linux DOC driver */ | |
1527 | ||
6d0f6bcf | 1528 | #ifdef CONFIG_SYS_DOCPROBE_55AA |
c609719b WD |
1529 | /* Check for 0x55 0xAA signature at beginning of window, |
1530 | this is no longer true once we remove the IPL (for Millennium */ | |
1531 | if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa) | |
1532 | return 0; | |
6d0f6bcf | 1533 | #endif /* CONFIG_SYS_DOCPROBE_55AA */ |
c609719b WD |
1534 | |
1535 | #ifndef DOC_PASSIVE_PROBE | |
1536 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1537 | * bootup procedure will put the device into reset mode, and | |
1538 | * it's not possible to talk to it without actually writing | |
1539 | * to the DOCControl register. So we store the current contents | |
1540 | * of the DOCControl register's location, in case we later decide | |
1541 | * that it's not a DiskOnChip, and want to put it back how we | |
1542 | * found it. | |
1543 | */ | |
1544 | tmp2 = ReadDOC(window, DOCControl); | |
1545 | ||
1546 | /* Reset the DiskOnChip ASIC */ | |
1547 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1548 | window, DOCControl); | |
1549 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1550 | window, DOCControl); | |
1551 | ||
1552 | /* Enable the DiskOnChip ASIC */ | |
1553 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1554 | window, DOCControl); | |
1555 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1556 | window, DOCControl); | |
1557 | #endif /* !DOC_PASSIVE_PROBE */ | |
1558 | ||
1559 | ChipID = ReadDOC(window, ChipID); | |
1560 | ||
1561 | switch (ChipID) { | |
1562 | case DOC_ChipID_Doc2k: | |
1563 | /* Check the TOGGLE bit in the ECC register */ | |
1564 | tmp = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; | |
1565 | if ((ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT) != tmp) | |
1566 | return ChipID; | |
1567 | break; | |
1568 | ||
1569 | case DOC_ChipID_DocMil: | |
1570 | /* Check the TOGGLE bit in the ECC register */ | |
1571 | tmp = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; | |
1572 | if ((ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT) != tmp) | |
1573 | return ChipID; | |
1574 | break; | |
1575 | ||
1576 | default: | |
6d0f6bcf | 1577 | #ifndef CONFIG_SYS_DOCPROBE_55AA |
c609719b WD |
1578 | /* |
1579 | * if the ID isn't the DoC2000 or DoCMillenium ID, so we can assume | |
1580 | * the DOC is missing | |
1581 | */ | |
1582 | # if 0 | |
1583 | printf("Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n", | |
1584 | ChipID, physadr); | |
1585 | # endif | |
1586 | #endif | |
1587 | #ifndef DOC_PASSIVE_PROBE | |
1588 | /* Put back the contents of the DOCControl register, in case it's not | |
1589 | * actually a DiskOnChip. | |
1590 | */ | |
1591 | WriteDOC(tmp2, window, DOCControl); | |
1592 | #endif | |
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | puts ("DiskOnChip failed TOGGLE test, dropping.\n"); | |
1597 | ||
1598 | #ifndef DOC_PASSIVE_PROBE | |
1599 | /* Put back the contents of the DOCControl register: it's not a DiskOnChip */ | |
1600 | WriteDOC(tmp2, window, DOCControl); | |
1601 | #endif | |
1602 | return 0; | |
1603 | } | |
1604 | ||
1605 | void doc_probe(unsigned long physadr) | |
1606 | { | |
1607 | struct DiskOnChip *this = NULL; | |
1608 | int i=0, ChipID; | |
1609 | ||
1610 | if ((ChipID = doccheck(physadr, physadr))) { | |
1611 | ||
6d0f6bcf | 1612 | for (i=0; i<CONFIG_SYS_MAX_DOC_DEVICE; i++) { |
c609719b WD |
1613 | if (doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) { |
1614 | this = doc_dev_desc + i; | |
1615 | break; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | if (!this) { | |
1620 | puts ("Cannot allocate memory for data structures.\n"); | |
1621 | return; | |
1622 | } | |
1623 | ||
1624 | if (curr_device == -1) | |
1625 | curr_device = i; | |
1626 | ||
1627 | memset((char *)this, 0, sizeof(struct DiskOnChip)); | |
1628 | ||
1629 | this->virtadr = physadr; | |
1630 | this->physadr = physadr; | |
1631 | this->ChipID = ChipID; | |
1632 | ||
1633 | DoC2k_init(this); | |
1634 | } else { | |
1635 | puts ("No DiskOnChip found\n"); | |
1636 | } | |
1637 | } | |
cfa460ad WJ |
1638 | #else |
1639 | void doc_probe(unsigned long physadr) {} | |
1640 | #endif |