Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/mtd/nand/diskonchip.c | |
3 | * | |
4 | * (C) 2003 Red Hat, Inc. | |
5 | * (C) 2004 Dan Brown <dan_brown@ieee.org> | |
6 | * (C) 2004 Kalev Lember <kalev@smartlink.ee> | |
7 | * | |
8 | * Author: David Woodhouse <dwmw2@infradead.org> | |
9 | * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org> | |
10 | * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee> | |
11 | * | |
12 | * Error correction code lifted from the old docecc code | |
13 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) | |
14 | * Copyright (C) 2000 Netgem S.A. | |
15 | * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de> | |
16 | * | |
17 | * Interface to generic NAND code for M-Systems DiskOnChip devices | |
18 | * | |
dfd61294 | 19 | * $Id: diskonchip.c,v 1.49 2005/02/22 21:48:21 gleixner Exp $ |
1da177e4 LT |
20 | */ |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/sched.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/rslib.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <asm/io.h> | |
29 | ||
30 | #include <linux/mtd/mtd.h> | |
31 | #include <linux/mtd/nand.h> | |
32 | #include <linux/mtd/doc2000.h> | |
33 | #include <linux/mtd/compatmac.h> | |
34 | #include <linux/mtd/partitions.h> | |
35 | #include <linux/mtd/inftl.h> | |
36 | ||
37 | /* Where to look for the devices? */ | |
651078ba TG |
38 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
39 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
1da177e4 LT |
40 | #endif |
41 | ||
42 | static unsigned long __initdata doc_locations[] = { | |
43 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) | |
651078ba | 44 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
1da177e4 LT |
45 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
46 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, | |
47 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, | |
48 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
49 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, | |
50 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ | |
51 | 0xc8000, 0xca000, 0xcc000, 0xce000, | |
52 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, | |
53 | 0xd8000, 0xda000, 0xdc000, 0xde000, | |
54 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
55 | 0xe8000, 0xea000, 0xec000, 0xee000, | |
56 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ | |
57 | #elif defined(__PPC__) | |
58 | 0xe4000000, | |
59 | #elif defined(CONFIG_MOMENCO_OCELOT) | |
60 | 0x2f000000, | |
61 | 0xff000000, | |
62 | #elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C) | |
63 | 0xff000000, | |
64 | ##else | |
65 | #warning Unknown architecture for DiskOnChip. No default probe locations defined | |
66 | #endif | |
67 | 0xffffffff }; | |
68 | ||
69 | static struct mtd_info *doclist = NULL; | |
70 | ||
71 | struct doc_priv { | |
72 | void __iomem *virtadr; | |
73 | unsigned long physadr; | |
74 | u_char ChipID; | |
75 | u_char CDSNControl; | |
76 | int chips_per_floor; /* The number of chips detected on each floor */ | |
77 | int curfloor; | |
78 | int curchip; | |
79 | int mh0_page; | |
80 | int mh1_page; | |
81 | struct mtd_info *nextdoc; | |
82 | }; | |
83 | ||
84 | /* Max number of eraseblocks to scan (from start of device) for the (I)NFTL | |
85 | MediaHeader. The spec says to just keep going, I think, but that's just | |
86 | silly. */ | |
87 | #define MAX_MEDIAHEADER_SCAN 8 | |
88 | ||
89 | /* This is the syndrome computed by the HW ecc generator upon reading an empty | |
90 | page, one with all 0xff for data and stored ecc code. */ | |
91 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
92 | /* This is the ecc value computed by the HW ecc generator upon writing an empty | |
93 | page, one with all 0xff for data. */ | |
94 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
95 | ||
96 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
97 | ||
98 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
99 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
100 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
101 | ||
102 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd); | |
103 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); | |
104 | ||
105 | static int debug=0; | |
106 | module_param(debug, int, 0); | |
107 | ||
108 | static int try_dword=1; | |
109 | module_param(try_dword, int, 0); | |
110 | ||
111 | static int no_ecc_failures=0; | |
112 | module_param(no_ecc_failures, int, 0); | |
113 | ||
114 | #ifdef CONFIG_MTD_PARTITIONS | |
115 | static int no_autopart=0; | |
116 | module_param(no_autopart, int, 0); | |
117 | #endif | |
118 | ||
119 | #ifdef MTD_NAND_DISKONCHIP_BBTWRITE | |
120 | static int inftl_bbt_write=1; | |
121 | #else | |
122 | static int inftl_bbt_write=0; | |
123 | #endif | |
124 | module_param(inftl_bbt_write, int, 0); | |
125 | ||
651078ba | 126 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
127 | module_param(doc_config_location, ulong, 0); |
128 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
129 | ||
130 | ||
131 | /* Sector size for HW ECC */ | |
132 | #define SECTOR_SIZE 512 | |
133 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
134 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
135 | /* Number of roots */ | |
136 | #define NROOTS 4 | |
137 | /* First consective root */ | |
138 | #define FCR 510 | |
139 | /* Number of symbols */ | |
140 | #define NN 1023 | |
141 | ||
142 | /* the Reed Solomon control structure */ | |
143 | static struct rs_control *rs_decoder; | |
144 | ||
145 | /* | |
146 | * The HW decoder in the DoC ASIC's provides us a error syndrome, | |
147 | * which we must convert to a standard syndrom usable by the generic | |
148 | * Reed-Solomon library code. | |
149 | * | |
150 | * Fabrice Bellard figured this out in the old docecc code. I added | |
151 | * some comments, improved a minor bit and converted it to make use | |
152 | * of the generic Reed-Solomon libary. tglx | |
153 | */ | |
154 | static int doc_ecc_decode (struct rs_control *rs, uint8_t *data, uint8_t *ecc) | |
155 | { | |
156 | int i, j, nerr, errpos[8]; | |
157 | uint8_t parity; | |
158 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
159 | ||
160 | /* Convert the ecc bytes into words */ | |
161 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
162 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
163 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
164 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
165 | parity = ecc[1]; | |
166 | ||
167 | /* Initialize the syndrom buffer */ | |
168 | for (i = 0; i < NROOTS; i++) | |
169 | s[i] = ds[0]; | |
170 | /* | |
171 | * Evaluate | |
172 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] | |
173 | * where x = alpha^(FCR + i) | |
174 | */ | |
175 | for(j = 1; j < NROOTS; j++) { | |
176 | if(ds[j] == 0) | |
177 | continue; | |
178 | tmp = rs->index_of[ds[j]]; | |
179 | for(i = 0; i < NROOTS; i++) | |
180 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; | |
181 | } | |
182 | ||
183 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
184 | for (i = 0; i < NROOTS; i++) { | |
185 | if (syn[i]) | |
186 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); | |
187 | } | |
188 | /* Call the decoder library */ | |
189 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
190 | ||
191 | /* Incorrectable errors ? */ | |
192 | if (nerr < 0) | |
193 | return nerr; | |
194 | ||
195 | /* | |
196 | * Correct the errors. The bitpositions are a bit of magic, | |
197 | * but they are given by the design of the de/encoder circuit | |
198 | * in the DoC ASIC's. | |
199 | */ | |
200 | for(i = 0;i < nerr; i++) { | |
201 | int index, bitpos, pos = 1015 - errpos[i]; | |
202 | uint8_t val; | |
203 | if (pos >= NB_DATA && pos < 1019) | |
204 | continue; | |
205 | if (pos < NB_DATA) { | |
206 | /* extract bit position (MSB first) */ | |
207 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
208 | /* now correct the following 10 bits. At most two bytes | |
209 | can be modified since pos is even */ | |
210 | index = (pos >> 3) ^ 1; | |
211 | bitpos = pos & 7; | |
212 | if ((index >= 0 && index < SECTOR_SIZE) || | |
213 | index == (SECTOR_SIZE + 1)) { | |
214 | val = (uint8_t) (errval[i] >> (2 + bitpos)); | |
215 | parity ^= val; | |
216 | if (index < SECTOR_SIZE) | |
217 | data[index] ^= val; | |
218 | } | |
219 | index = ((pos >> 3) + 1) ^ 1; | |
220 | bitpos = (bitpos + 10) & 7; | |
221 | if (bitpos == 0) | |
222 | bitpos = 8; | |
223 | if ((index >= 0 && index < SECTOR_SIZE) || | |
224 | index == (SECTOR_SIZE + 1)) { | |
225 | val = (uint8_t)(errval[i] << (8 - bitpos)); | |
226 | parity ^= val; | |
227 | if (index < SECTOR_SIZE) | |
228 | data[index] ^= val; | |
229 | } | |
230 | } | |
231 | } | |
232 | /* If the parity is wrong, no rescue possible */ | |
233 | return parity ? -1 : nerr; | |
234 | } | |
235 | ||
236 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
237 | { | |
238 | volatile char dummy; | |
239 | int i; | |
240 | ||
241 | for (i = 0; i < cycles; i++) { | |
242 | if (DoC_is_Millennium(doc)) | |
243 | dummy = ReadDOC(doc->virtadr, NOP); | |
244 | else if (DoC_is_MillenniumPlus(doc)) | |
245 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
246 | else | |
247 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
248 | } | |
249 | ||
250 | } | |
251 | ||
252 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
253 | ||
254 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
255 | static int _DoC_WaitReady(struct doc_priv *doc) | |
256 | { | |
257 | void __iomem *docptr = doc->virtadr; | |
258 | unsigned long timeo = jiffies + (HZ * 10); | |
259 | ||
260 | if(debug) printk("_DoC_WaitReady...\n"); | |
261 | /* Out-of-line routine to wait for chip response */ | |
262 | if (DoC_is_MillenniumPlus(doc)) { | |
263 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
264 | if (time_after(jiffies, timeo)) { | |
265 | printk("_DoC_WaitReady timed out.\n"); | |
266 | return -EIO; | |
267 | } | |
268 | udelay(1); | |
269 | cond_resched(); | |
270 | } | |
271 | } else { | |
272 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
273 | if (time_after(jiffies, timeo)) { | |
274 | printk("_DoC_WaitReady timed out.\n"); | |
275 | return -EIO; | |
276 | } | |
277 | udelay(1); | |
278 | cond_resched(); | |
279 | } | |
280 | } | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
286 | { | |
287 | void __iomem *docptr = doc->virtadr; | |
288 | int ret = 0; | |
289 | ||
290 | if (DoC_is_MillenniumPlus(doc)) { | |
291 | DoC_Delay(doc, 4); | |
292 | ||
293 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
294 | /* Call the out-of-line routine to wait */ | |
295 | ret = _DoC_WaitReady(doc); | |
296 | } else { | |
297 | DoC_Delay(doc, 4); | |
298 | ||
299 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
300 | /* Call the out-of-line routine to wait */ | |
301 | ret = _DoC_WaitReady(doc); | |
302 | DoC_Delay(doc, 2); | |
303 | } | |
304 | ||
305 | if(debug) printk("DoC_WaitReady OK\n"); | |
306 | return ret; | |
307 | } | |
308 | ||
309 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
310 | { | |
311 | struct nand_chip *this = mtd->priv; | |
312 | struct doc_priv *doc = this->priv; | |
313 | void __iomem *docptr = doc->virtadr; | |
314 | ||
315 | if(debug)printk("write_byte %02x\n", datum); | |
316 | WriteDOC(datum, docptr, CDSNSlowIO); | |
317 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
318 | } | |
319 | ||
320 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
321 | { | |
322 | struct nand_chip *this = mtd->priv; | |
323 | struct doc_priv *doc = this->priv; | |
324 | void __iomem *docptr = doc->virtadr; | |
325 | u_char ret; | |
326 | ||
327 | ReadDOC(docptr, CDSNSlowIO); | |
328 | DoC_Delay(doc, 2); | |
329 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
330 | if (debug) printk("read_byte returns %02x\n", ret); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | static void doc2000_writebuf(struct mtd_info *mtd, | |
335 | const u_char *buf, int len) | |
336 | { | |
337 | struct nand_chip *this = mtd->priv; | |
338 | struct doc_priv *doc = this->priv; | |
339 | void __iomem *docptr = doc->virtadr; | |
340 | int i; | |
341 | if (debug)printk("writebuf of %d bytes: ", len); | |
342 | for (i=0; i < len; i++) { | |
343 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); | |
344 | if (debug && i < 16) | |
345 | printk("%02x ", buf[i]); | |
346 | } | |
347 | if (debug) printk("\n"); | |
348 | } | |
349 | ||
350 | static void doc2000_readbuf(struct mtd_info *mtd, | |
351 | u_char *buf, int len) | |
352 | { | |
353 | struct nand_chip *this = mtd->priv; | |
354 | struct doc_priv *doc = this->priv; | |
355 | void __iomem *docptr = doc->virtadr; | |
356 | int i; | |
357 | ||
358 | if (debug)printk("readbuf of %d bytes: ", len); | |
359 | ||
360 | for (i=0; i < len; i++) { | |
361 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); | |
362 | } | |
363 | } | |
364 | ||
365 | static void doc2000_readbuf_dword(struct mtd_info *mtd, | |
366 | u_char *buf, int len) | |
367 | { | |
368 | struct nand_chip *this = mtd->priv; | |
369 | struct doc_priv *doc = this->priv; | |
370 | void __iomem *docptr = doc->virtadr; | |
371 | int i; | |
372 | ||
373 | if (debug) printk("readbuf_dword of %d bytes: ", len); | |
374 | ||
375 | if (unlikely((((unsigned long)buf)|len) & 3)) { | |
376 | for (i=0; i < len; i++) { | |
377 | *(uint8_t *)(&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
378 | } | |
379 | } else { | |
380 | for (i=0; i < len; i+=4) { | |
381 | *(uint32_t*)(&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
382 | } | |
383 | } | |
384 | } | |
385 | ||
386 | static int doc2000_verifybuf(struct mtd_info *mtd, | |
387 | const u_char *buf, int len) | |
388 | { | |
389 | struct nand_chip *this = mtd->priv; | |
390 | struct doc_priv *doc = this->priv; | |
391 | void __iomem *docptr = doc->virtadr; | |
392 | int i; | |
393 | ||
394 | for (i=0; i < len; i++) | |
395 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) | |
396 | return -EFAULT; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
401 | { | |
402 | struct nand_chip *this = mtd->priv; | |
403 | struct doc_priv *doc = this->priv; | |
404 | uint16_t ret; | |
405 | ||
406 | doc200x_select_chip(mtd, nr); | |
407 | doc200x_hwcontrol(mtd, NAND_CTL_SETCLE); | |
408 | this->write_byte(mtd, NAND_CMD_READID); | |
409 | doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE); | |
410 | doc200x_hwcontrol(mtd, NAND_CTL_SETALE); | |
411 | this->write_byte(mtd, 0); | |
412 | doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); | |
dfd61294 TG |
413 | |
414 | /* We cant' use dev_ready here, but at least we wait for the | |
415 | * command to complete | |
416 | */ | |
417 | udelay(50); | |
418 | ||
1da177e4 LT |
419 | ret = this->read_byte(mtd) << 8; |
420 | ret |= this->read_byte(mtd); | |
421 | ||
422 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
423 | /* First chip probe. See if we get same results by 32-bit access */ | |
424 | union { | |
425 | uint32_t dword; | |
426 | uint8_t byte[4]; | |
427 | } ident; | |
428 | void __iomem *docptr = doc->virtadr; | |
429 | ||
430 | doc200x_hwcontrol(mtd, NAND_CTL_SETCLE); | |
431 | doc2000_write_byte(mtd, NAND_CMD_READID); | |
432 | doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE); | |
433 | doc200x_hwcontrol(mtd, NAND_CTL_SETALE); | |
434 | doc2000_write_byte(mtd, 0); | |
435 | doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); | |
436 | ||
dfd61294 TG |
437 | udelay(50); |
438 | ||
1da177e4 LT |
439 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
440 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
441 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
442 | this->read_buf = &doc2000_readbuf_dword; | |
443 | } | |
444 | } | |
445 | ||
446 | return ret; | |
447 | } | |
448 | ||
449 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
450 | { | |
451 | struct nand_chip *this = mtd->priv; | |
452 | struct doc_priv *doc = this->priv; | |
453 | uint16_t mfrid; | |
454 | int i; | |
455 | ||
456 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
457 | doc->chips_per_floor = 4; | |
458 | ||
459 | /* Find out what the first chip is */ | |
460 | mfrid = doc200x_ident_chip(mtd, 0); | |
461 | ||
462 | /* Find how many chips in each floor. */ | |
463 | for (i = 1; i < 4; i++) { | |
464 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
465 | break; | |
466 | } | |
467 | doc->chips_per_floor = i; | |
468 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
469 | } | |
470 | ||
471 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
472 | { | |
473 | struct doc_priv *doc = this->priv; | |
474 | ||
475 | int status; | |
476 | ||
477 | DoC_WaitReady(doc); | |
478 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
479 | DoC_WaitReady(doc); | |
480 | status = (int)this->read_byte(mtd); | |
481 | ||
482 | return status; | |
483 | } | |
484 | ||
485 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
486 | { | |
487 | struct nand_chip *this = mtd->priv; | |
488 | struct doc_priv *doc = this->priv; | |
489 | void __iomem *docptr = doc->virtadr; | |
490 | ||
491 | WriteDOC(datum, docptr, CDSNSlowIO); | |
492 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
493 | WriteDOC(datum, docptr, WritePipeTerm); | |
494 | } | |
495 | ||
496 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
497 | { | |
498 | struct nand_chip *this = mtd->priv; | |
499 | struct doc_priv *doc = this->priv; | |
500 | void __iomem *docptr = doc->virtadr; | |
501 | ||
502 | //ReadDOC(docptr, CDSNSlowIO); | |
503 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
504 | DoC_Delay(doc, 2); | |
505 | ReadDOC(docptr, ReadPipeInit); | |
506 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
507 | return ReadDOC(docptr, LastDataRead); | |
508 | } | |
509 | ||
510 | static void doc2001_writebuf(struct mtd_info *mtd, | |
511 | const u_char *buf, int len) | |
512 | { | |
513 | struct nand_chip *this = mtd->priv; | |
514 | struct doc_priv *doc = this->priv; | |
515 | void __iomem *docptr = doc->virtadr; | |
516 | int i; | |
517 | ||
518 | for (i=0; i < len; i++) | |
519 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); | |
520 | /* Terminate write pipeline */ | |
521 | WriteDOC(0x00, docptr, WritePipeTerm); | |
522 | } | |
523 | ||
524 | static void doc2001_readbuf(struct mtd_info *mtd, | |
525 | u_char *buf, int len) | |
526 | { | |
527 | struct nand_chip *this = mtd->priv; | |
528 | struct doc_priv *doc = this->priv; | |
529 | void __iomem *docptr = doc->virtadr; | |
530 | int i; | |
531 | ||
532 | /* Start read pipeline */ | |
533 | ReadDOC(docptr, ReadPipeInit); | |
534 | ||
535 | for (i=0; i < len-1; i++) | |
536 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); | |
537 | ||
538 | /* Terminate read pipeline */ | |
539 | buf[i] = ReadDOC(docptr, LastDataRead); | |
540 | } | |
541 | ||
542 | static int doc2001_verifybuf(struct mtd_info *mtd, | |
543 | const u_char *buf, int len) | |
544 | { | |
545 | struct nand_chip *this = mtd->priv; | |
546 | struct doc_priv *doc = this->priv; | |
547 | void __iomem *docptr = doc->virtadr; | |
548 | int i; | |
549 | ||
550 | /* Start read pipeline */ | |
551 | ReadDOC(docptr, ReadPipeInit); | |
552 | ||
553 | for (i=0; i < len-1; i++) | |
554 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { | |
555 | ReadDOC(docptr, LastDataRead); | |
556 | return i; | |
557 | } | |
558 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
559 | return i; | |
560 | return 0; | |
561 | } | |
562 | ||
563 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
564 | { | |
565 | struct nand_chip *this = mtd->priv; | |
566 | struct doc_priv *doc = this->priv; | |
567 | void __iomem *docptr = doc->virtadr; | |
568 | u_char ret; | |
569 | ||
570 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
571 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
572 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
573 | if (debug) printk("read_byte returns %02x\n", ret); | |
574 | return ret; | |
575 | } | |
576 | ||
577 | static void doc2001plus_writebuf(struct mtd_info *mtd, | |
578 | const u_char *buf, int len) | |
579 | { | |
580 | struct nand_chip *this = mtd->priv; | |
581 | struct doc_priv *doc = this->priv; | |
582 | void __iomem *docptr = doc->virtadr; | |
583 | int i; | |
584 | ||
585 | if (debug)printk("writebuf of %d bytes: ", len); | |
586 | for (i=0; i < len; i++) { | |
587 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); | |
588 | if (debug && i < 16) | |
589 | printk("%02x ", buf[i]); | |
590 | } | |
591 | if (debug) printk("\n"); | |
592 | } | |
593 | ||
594 | static void doc2001plus_readbuf(struct mtd_info *mtd, | |
595 | u_char *buf, int len) | |
596 | { | |
597 | struct nand_chip *this = mtd->priv; | |
598 | struct doc_priv *doc = this->priv; | |
599 | void __iomem *docptr = doc->virtadr; | |
600 | int i; | |
601 | ||
602 | if (debug)printk("readbuf of %d bytes: ", len); | |
603 | ||
604 | /* Start read pipeline */ | |
605 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
606 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
607 | ||
608 | for (i=0; i < len-2; i++) { | |
609 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); | |
610 | if (debug && i < 16) | |
611 | printk("%02x ", buf[i]); | |
612 | } | |
613 | ||
614 | /* Terminate read pipeline */ | |
615 | buf[len-2] = ReadDOC(docptr, Mplus_LastDataRead); | |
616 | if (debug && i < 16) | |
617 | printk("%02x ", buf[len-2]); | |
618 | buf[len-1] = ReadDOC(docptr, Mplus_LastDataRead); | |
619 | if (debug && i < 16) | |
620 | printk("%02x ", buf[len-1]); | |
621 | if (debug) printk("\n"); | |
622 | } | |
623 | ||
624 | static int doc2001plus_verifybuf(struct mtd_info *mtd, | |
625 | const u_char *buf, int len) | |
626 | { | |
627 | struct nand_chip *this = mtd->priv; | |
628 | struct doc_priv *doc = this->priv; | |
629 | void __iomem *docptr = doc->virtadr; | |
630 | int i; | |
631 | ||
632 | if (debug)printk("verifybuf of %d bytes: ", len); | |
633 | ||
634 | /* Start read pipeline */ | |
635 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
636 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
637 | ||
638 | for (i=0; i < len-2; i++) | |
639 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { | |
640 | ReadDOC(docptr, Mplus_LastDataRead); | |
641 | ReadDOC(docptr, Mplus_LastDataRead); | |
642 | return i; | |
643 | } | |
644 | if (buf[len-2] != ReadDOC(docptr, Mplus_LastDataRead)) | |
645 | return len-2; | |
646 | if (buf[len-1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
647 | return len-1; | |
648 | return 0; | |
649 | } | |
650 | ||
651 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
652 | { | |
653 | struct nand_chip *this = mtd->priv; | |
654 | struct doc_priv *doc = this->priv; | |
655 | void __iomem *docptr = doc->virtadr; | |
656 | int floor = 0; | |
657 | ||
658 | if(debug)printk("select chip (%d)\n", chip); | |
659 | ||
660 | if (chip == -1) { | |
661 | /* Disable flash internally */ | |
662 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
663 | return; | |
664 | } | |
665 | ||
666 | floor = chip / doc->chips_per_floor; | |
667 | chip -= (floor * doc->chips_per_floor); | |
668 | ||
669 | /* Assert ChipEnable and deassert WriteProtect */ | |
670 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
671 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
672 | ||
673 | doc->curchip = chip; | |
674 | doc->curfloor = floor; | |
675 | } | |
676 | ||
677 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
678 | { | |
679 | struct nand_chip *this = mtd->priv; | |
680 | struct doc_priv *doc = this->priv; | |
681 | void __iomem *docptr = doc->virtadr; | |
682 | int floor = 0; | |
683 | ||
684 | if(debug)printk("select chip (%d)\n", chip); | |
685 | ||
686 | if (chip == -1) | |
687 | return; | |
688 | ||
689 | floor = chip / doc->chips_per_floor; | |
690 | chip -= (floor * doc->chips_per_floor); | |
691 | ||
692 | /* 11.4.4 -- deassert CE before changing chip */ | |
693 | doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE); | |
694 | ||
695 | WriteDOC(floor, docptr, FloorSelect); | |
696 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
697 | ||
698 | doc200x_hwcontrol(mtd, NAND_CTL_SETNCE); | |
699 | ||
700 | doc->curchip = chip; | |
701 | doc->curfloor = floor; | |
702 | } | |
703 | ||
704 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd) | |
705 | { | |
706 | struct nand_chip *this = mtd->priv; | |
707 | struct doc_priv *doc = this->priv; | |
708 | void __iomem *docptr = doc->virtadr; | |
709 | ||
710 | switch(cmd) { | |
711 | case NAND_CTL_SETNCE: | |
712 | doc->CDSNControl |= CDSN_CTRL_CE; | |
713 | break; | |
714 | case NAND_CTL_CLRNCE: | |
715 | doc->CDSNControl &= ~CDSN_CTRL_CE; | |
716 | break; | |
717 | case NAND_CTL_SETCLE: | |
718 | doc->CDSNControl |= CDSN_CTRL_CLE; | |
719 | break; | |
720 | case NAND_CTL_CLRCLE: | |
721 | doc->CDSNControl &= ~CDSN_CTRL_CLE; | |
722 | break; | |
723 | case NAND_CTL_SETALE: | |
724 | doc->CDSNControl |= CDSN_CTRL_ALE; | |
725 | break; | |
726 | case NAND_CTL_CLRALE: | |
727 | doc->CDSNControl &= ~CDSN_CTRL_ALE; | |
728 | break; | |
729 | case NAND_CTL_SETWP: | |
730 | doc->CDSNControl |= CDSN_CTRL_WP; | |
731 | break; | |
732 | case NAND_CTL_CLRWP: | |
733 | doc->CDSNControl &= ~CDSN_CTRL_WP; | |
734 | break; | |
735 | } | |
736 | if (debug)printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
737 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
738 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
739 | DoC_Delay(doc, 4); | |
740 | } | |
741 | ||
742 | static void doc2001plus_command (struct mtd_info *mtd, unsigned command, int column, int page_addr) | |
743 | { | |
744 | struct nand_chip *this = mtd->priv; | |
745 | struct doc_priv *doc = this->priv; | |
746 | void __iomem *docptr = doc->virtadr; | |
747 | ||
748 | /* | |
749 | * Must terminate write pipeline before sending any commands | |
750 | * to the device. | |
751 | */ | |
752 | if (command == NAND_CMD_PAGEPROG) { | |
753 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
754 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
755 | } | |
756 | ||
757 | /* | |
758 | * Write out the command to the device. | |
759 | */ | |
760 | if (command == NAND_CMD_SEQIN) { | |
761 | int readcmd; | |
762 | ||
763 | if (column >= mtd->oobblock) { | |
764 | /* OOB area */ | |
765 | column -= mtd->oobblock; | |
766 | readcmd = NAND_CMD_READOOB; | |
767 | } else if (column < 256) { | |
768 | /* First 256 bytes --> READ0 */ | |
769 | readcmd = NAND_CMD_READ0; | |
770 | } else { | |
771 | column -= 256; | |
772 | readcmd = NAND_CMD_READ1; | |
773 | } | |
774 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
775 | } | |
776 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
777 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
778 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
779 | ||
780 | if (column != -1 || page_addr != -1) { | |
781 | /* Serially input address */ | |
782 | if (column != -1) { | |
783 | /* Adjust columns for 16 bit buswidth */ | |
784 | if (this->options & NAND_BUSWIDTH_16) | |
785 | column >>= 1; | |
786 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
787 | } | |
788 | if (page_addr != -1) { | |
789 | WriteDOC((unsigned char) (page_addr & 0xff), docptr, Mplus_FlashAddress); | |
790 | WriteDOC((unsigned char) ((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
791 | /* One more address cycle for higher density devices */ | |
792 | if (this->chipsize & 0x0c000000) { | |
793 | WriteDOC((unsigned char) ((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); | |
794 | printk("high density\n"); | |
795 | } | |
796 | } | |
797 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
798 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
799 | /* deassert ALE */ | |
800 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
801 | WriteDOC(0, docptr, Mplus_FlashControl); | |
802 | } | |
803 | ||
804 | /* | |
805 | * program and erase have their own busy handlers | |
806 | * status and sequential in needs no delay | |
807 | */ | |
808 | switch (command) { | |
809 | ||
810 | case NAND_CMD_PAGEPROG: | |
811 | case NAND_CMD_ERASE1: | |
812 | case NAND_CMD_ERASE2: | |
813 | case NAND_CMD_SEQIN: | |
814 | case NAND_CMD_STATUS: | |
815 | return; | |
816 | ||
817 | case NAND_CMD_RESET: | |
818 | if (this->dev_ready) | |
819 | break; | |
820 | udelay(this->chip_delay); | |
821 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
822 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
823 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
824 | while ( !(this->read_byte(mtd) & 0x40)); | |
825 | return; | |
826 | ||
827 | /* This applies to read commands */ | |
828 | default: | |
829 | /* | |
830 | * If we don't have access to the busy pin, we apply the given | |
831 | * command delay | |
832 | */ | |
833 | if (!this->dev_ready) { | |
834 | udelay (this->chip_delay); | |
835 | return; | |
836 | } | |
837 | } | |
838 | ||
839 | /* Apply this short delay always to ensure that we do wait tWB in | |
840 | * any case on any machine. */ | |
841 | ndelay (100); | |
842 | /* wait until command is processed */ | |
843 | while (!this->dev_ready(mtd)); | |
844 | } | |
845 | ||
846 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
847 | { | |
848 | struct nand_chip *this = mtd->priv; | |
849 | struct doc_priv *doc = this->priv; | |
850 | void __iomem *docptr = doc->virtadr; | |
851 | ||
852 | if (DoC_is_MillenniumPlus(doc)) { | |
853 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
854 | DoC_Delay(doc, 4); | |
855 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
856 | if(debug) | |
857 | printk("not ready\n"); | |
858 | return 0; | |
859 | } | |
860 | if (debug)printk("was ready\n"); | |
861 | return 1; | |
862 | } else { | |
863 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
864 | DoC_Delay(doc, 4); | |
865 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
866 | if(debug) | |
867 | printk("not ready\n"); | |
868 | return 0; | |
869 | } | |
870 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
871 | DoC_Delay(doc, 2); | |
872 | if (debug)printk("was ready\n"); | |
873 | return 1; | |
874 | } | |
875 | } | |
876 | ||
877 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
878 | { | |
879 | /* This is our last resort if we couldn't find or create a BBT. Just | |
880 | pretend all blocks are good. */ | |
881 | return 0; | |
882 | } | |
883 | ||
884 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
885 | { | |
886 | struct nand_chip *this = mtd->priv; | |
887 | struct doc_priv *doc = this->priv; | |
888 | void __iomem *docptr = doc->virtadr; | |
889 | ||
890 | /* Prime the ECC engine */ | |
891 | switch(mode) { | |
892 | case NAND_ECC_READ: | |
893 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
894 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
895 | break; | |
896 | case NAND_ECC_WRITE: | |
897 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
898 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
899 | break; | |
900 | } | |
901 | } | |
902 | ||
903 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
904 | { | |
905 | struct nand_chip *this = mtd->priv; | |
906 | struct doc_priv *doc = this->priv; | |
907 | void __iomem *docptr = doc->virtadr; | |
908 | ||
909 | /* Prime the ECC engine */ | |
910 | switch(mode) { | |
911 | case NAND_ECC_READ: | |
912 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
913 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
914 | break; | |
915 | case NAND_ECC_WRITE: | |
916 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
917 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
918 | break; | |
919 | } | |
920 | } | |
921 | ||
922 | /* This code is only called on write */ | |
923 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, | |
924 | unsigned char *ecc_code) | |
925 | { | |
926 | struct nand_chip *this = mtd->priv; | |
927 | struct doc_priv *doc = this->priv; | |
928 | void __iomem *docptr = doc->virtadr; | |
929 | int i; | |
930 | int emptymatch = 1; | |
931 | ||
932 | /* flush the pipeline */ | |
933 | if (DoC_is_2000(doc)) { | |
934 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
935 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
936 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
937 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
938 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
939 | } else if (DoC_is_MillenniumPlus(doc)) { | |
940 | WriteDOC(0, docptr, Mplus_NOP); | |
941 | WriteDOC(0, docptr, Mplus_NOP); | |
942 | WriteDOC(0, docptr, Mplus_NOP); | |
943 | } else { | |
944 | WriteDOC(0, docptr, NOP); | |
945 | WriteDOC(0, docptr, NOP); | |
946 | WriteDOC(0, docptr, NOP); | |
947 | } | |
948 | ||
949 | for (i = 0; i < 6; i++) { | |
950 | if (DoC_is_MillenniumPlus(doc)) | |
951 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
952 | else | |
953 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
954 | if (ecc_code[i] != empty_write_ecc[i]) | |
955 | emptymatch = 0; | |
956 | } | |
957 | if (DoC_is_MillenniumPlus(doc)) | |
958 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
959 | else | |
960 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
961 | #if 0 | |
962 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
963 | if (emptymatch) { | |
964 | /* Note: this somewhat expensive test should not be triggered | |
965 | often. It could be optimized away by examining the data in | |
966 | the writebuf routine, and remembering the result. */ | |
967 | for (i = 0; i < 512; i++) { | |
968 | if (dat[i] == 0xff) continue; | |
969 | emptymatch = 0; | |
970 | break; | |
971 | } | |
972 | } | |
973 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
974 | Return all-0xff ecc value instead of the computed one, so | |
975 | it'll look just like a freshly-erased page. */ | |
976 | if (emptymatch) memset(ecc_code, 0xff, 6); | |
977 | #endif | |
978 | return 0; | |
979 | } | |
980 | ||
981 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc) | |
982 | { | |
983 | int i, ret = 0; | |
984 | struct nand_chip *this = mtd->priv; | |
985 | struct doc_priv *doc = this->priv; | |
986 | void __iomem *docptr = doc->virtadr; | |
987 | volatile u_char dummy; | |
988 | int emptymatch = 1; | |
989 | ||
990 | /* flush the pipeline */ | |
991 | if (DoC_is_2000(doc)) { | |
992 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
993 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
994 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
995 | } else if (DoC_is_MillenniumPlus(doc)) { | |
996 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
997 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
998 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
999 | } else { | |
1000 | dummy = ReadDOC(docptr, ECCConf); | |
1001 | dummy = ReadDOC(docptr, ECCConf); | |
1002 | dummy = ReadDOC(docptr, ECCConf); | |
1003 | } | |
1004 | ||
1005 | /* Error occured ? */ | |
1006 | if (dummy & 0x80) { | |
1007 | for (i = 0; i < 6; i++) { | |
1008 | if (DoC_is_MillenniumPlus(doc)) | |
1009 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
1010 | else | |
1011 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
1012 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
1013 | emptymatch = 0; | |
1014 | } | |
1015 | /* If emptymatch=1, the read syndrome is consistent with an | |
1016 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1017 | if (emptymatch) { | |
1018 | for (i = 0; i < 6; i++) { | |
1019 | if (read_ecc[i] == 0xff) continue; | |
1020 | emptymatch = 0; | |
1021 | break; | |
1022 | } | |
1023 | } | |
1024 | /* If emptymatch still =1, check the data block. */ | |
1025 | if (emptymatch) { | |
1026 | /* Note: this somewhat expensive test should not be triggered | |
1027 | often. It could be optimized away by examining the data in | |
1028 | the readbuf routine, and remembering the result. */ | |
1029 | for (i = 0; i < 512; i++) { | |
1030 | if (dat[i] == 0xff) continue; | |
1031 | emptymatch = 0; | |
1032 | break; | |
1033 | } | |
1034 | } | |
1035 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1036 | erased block, in which case the ECC will not come out right. | |
1037 | We'll suppress the error and tell the caller everything's | |
1038 | OK. Because it is. */ | |
1039 | if (!emptymatch) ret = doc_ecc_decode (rs_decoder, dat, calc_ecc); | |
1040 | if (ret > 0) | |
1041 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
1042 | } | |
1043 | if (DoC_is_MillenniumPlus(doc)) | |
1044 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1045 | else | |
1046 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1047 | if (no_ecc_failures && (ret == -1)) { | |
1048 | printk(KERN_ERR "suppressing ECC failure\n"); | |
1049 | ret = 0; | |
1050 | } | |
1051 | return ret; | |
1052 | } | |
1053 | ||
1054 | //u_char mydatabuf[528]; | |
1055 | ||
1056 | static struct nand_oobinfo doc200x_oobinfo = { | |
1057 | .useecc = MTD_NANDECC_AUTOPLACE, | |
1058 | .eccbytes = 6, | |
1059 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
1060 | .oobfree = { {8, 8} } | |
1061 | }; | |
1062 | ||
1063 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. | |
1064 | On sucessful return, buf will contain a copy of the media header for | |
1065 | further processing. id is the string to scan for, and will presumably be | |
1066 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1067 | header. The page #s of the found media headers are placed in mh0_page and | |
1068 | mh1_page in the DOC private structure. */ | |
1069 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, | |
1070 | const char *id, int findmirror) | |
1071 | { | |
1072 | struct nand_chip *this = mtd->priv; | |
1073 | struct doc_priv *doc = this->priv; | |
1074 | unsigned offs, end = (MAX_MEDIAHEADER_SCAN << this->phys_erase_shift); | |
1075 | int ret; | |
1076 | size_t retlen; | |
1077 | ||
1078 | end = min(end, mtd->size); // paranoia | |
1079 | for (offs = 0; offs < end; offs += mtd->erasesize) { | |
1080 | ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf); | |
1081 | if (retlen != mtd->oobblock) continue; | |
1082 | if (ret) { | |
1083 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", | |
1084 | offs); | |
1085 | } | |
1086 | if (memcmp(buf, id, 6)) continue; | |
1087 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); | |
1088 | if (doc->mh0_page == -1) { | |
1089 | doc->mh0_page = offs >> this->page_shift; | |
1090 | if (!findmirror) return 1; | |
1091 | continue; | |
1092 | } | |
1093 | doc->mh1_page = offs >> this->page_shift; | |
1094 | return 2; | |
1095 | } | |
1096 | if (doc->mh0_page == -1) { | |
1097 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1098 | return 0; | |
1099 | } | |
1100 | /* Only one mediaheader was found. We want buf to contain a | |
1101 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1102 | offs = doc->mh0_page << this->page_shift; | |
1103 | ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf); | |
1104 | if (retlen != mtd->oobblock) { | |
1105 | /* Insanity. Give up. */ | |
1106 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1107 | return 0; | |
1108 | } | |
1109 | return 1; | |
1110 | } | |
1111 | ||
1112 | static inline int __init nftl_partscan(struct mtd_info *mtd, | |
1113 | struct mtd_partition *parts) | |
1114 | { | |
1115 | struct nand_chip *this = mtd->priv; | |
1116 | struct doc_priv *doc = this->priv; | |
1117 | int ret = 0; | |
1118 | u_char *buf; | |
1119 | struct NFTLMediaHeader *mh; | |
1120 | const unsigned psize = 1 << this->page_shift; | |
1121 | unsigned blocks, maxblocks; | |
1122 | int offs, numheaders; | |
1123 | ||
1124 | buf = kmalloc(mtd->oobblock, GFP_KERNEL); | |
1125 | if (!buf) { | |
1126 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1127 | return 0; | |
1128 | } | |
1129 | if (!(numheaders=find_media_headers(mtd, buf, "ANAND", 1))) goto out; | |
1130 | mh = (struct NFTLMediaHeader *) buf; | |
1131 | ||
f29a4b86 TG |
1132 | mh->NumEraseUnits = le16_to_cpu(mh->NumEraseUnits); |
1133 | mh->FirstPhysicalEUN = le16_to_cpu(mh->FirstPhysicalEUN); | |
1134 | mh->FormattedSize = le32_to_cpu(mh->FormattedSize); | |
1135 | ||
1da177e4 LT |
1136 | printk(KERN_INFO " DataOrgID = %s\n" |
1137 | " NumEraseUnits = %d\n" | |
1138 | " FirstPhysicalEUN = %d\n" | |
1139 | " FormattedSize = %d\n" | |
1140 | " UnitSizeFactor = %d\n", | |
1141 | mh->DataOrgID, mh->NumEraseUnits, | |
1142 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1143 | mh->UnitSizeFactor); | |
1da177e4 LT |
1144 | |
1145 | blocks = mtd->size >> this->phys_erase_shift; | |
1146 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1147 | ||
1148 | if (mh->UnitSizeFactor == 0x00) { | |
1149 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1150 | - There can be at most 32768 virtual blocks. | |
1151 | - There can be at most (virtual block size - page size) | |
1152 | virtual blocks (because MediaHeader+BBT must fit in 1). | |
1153 | */ | |
1154 | mh->UnitSizeFactor = 0xff; | |
1155 | while (blocks > maxblocks) { | |
1156 | blocks >>= 1; | |
1157 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1158 | mh->UnitSizeFactor--; | |
1159 | } | |
1160 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1161 | } | |
1162 | ||
1163 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1164 | layers; variables with have already been configured by nand_scan. | |
1165 | Unfortunately, we didn't know before this point what these values | |
1166 | should be. Thus, this code is somewhat dependant on the exact | |
1167 | implementation of the NAND layer. */ | |
1168 | if (mh->UnitSizeFactor != 0xff) { | |
1169 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1170 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1171 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1172 | blocks = mtd->size >> this->bbt_erase_shift; | |
1173 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1174 | } | |
1175 | ||
1176 | if (blocks > maxblocks) { | |
1177 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1178 | goto out; | |
1179 | } | |
1180 | ||
1181 | /* Skip past the media headers. */ | |
1182 | offs = max(doc->mh0_page, doc->mh1_page); | |
1183 | offs <<= this->page_shift; | |
1184 | offs += mtd->erasesize; | |
1185 | ||
1da177e4 LT |
1186 | parts[0].name = " DiskOnChip BDTL partition"; |
1187 | parts[0].offset = offs; | |
1188 | parts[0].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1189 | ||
1190 | offs += parts[0].size; | |
1191 | if (offs < mtd->size) { | |
1192 | parts[1].name = " DiskOnChip Remainder partition"; | |
1193 | parts[1].offset = offs; | |
1194 | parts[1].size = mtd->size - offs; | |
1195 | ret = 2; | |
1196 | goto out; | |
1197 | } | |
1198 | ret = 1; | |
1199 | out: | |
1200 | kfree(buf); | |
1201 | return ret; | |
1202 | } | |
1203 | ||
1204 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
1205 | static inline int __init inftl_partscan(struct mtd_info *mtd, | |
1206 | struct mtd_partition *parts) | |
1207 | { | |
1208 | struct nand_chip *this = mtd->priv; | |
1209 | struct doc_priv *doc = this->priv; | |
1210 | int ret = 0; | |
1211 | u_char *buf; | |
1212 | struct INFTLMediaHeader *mh; | |
1213 | struct INFTLPartition *ip; | |
1214 | int numparts = 0; | |
1215 | int blocks; | |
1216 | int vshift, lastvunit = 0; | |
1217 | int i; | |
1218 | int end = mtd->size; | |
1219 | ||
1220 | if (inftl_bbt_write) | |
1221 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1222 | ||
1223 | buf = kmalloc(mtd->oobblock, GFP_KERNEL); | |
1224 | if (!buf) { | |
1225 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | if (!find_media_headers(mtd, buf, "BNAND", 0)) goto out; | |
1230 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); | |
1231 | mh = (struct INFTLMediaHeader *) buf; | |
1232 | ||
1233 | mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks); | |
1234 | mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions); | |
1235 | mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions); | |
1236 | mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits); | |
1237 | mh->FormatFlags = le32_to_cpu(mh->FormatFlags); | |
1238 | mh->PercentUsed = le32_to_cpu(mh->PercentUsed); | |
1239 | ||
1da177e4 LT |
1240 | printk(KERN_INFO " bootRecordID = %s\n" |
1241 | " NoOfBootImageBlocks = %d\n" | |
1242 | " NoOfBinaryPartitions = %d\n" | |
1243 | " NoOfBDTLPartitions = %d\n" | |
1244 | " BlockMultiplerBits = %d\n" | |
1245 | " FormatFlgs = %d\n" | |
1246 | " OsakVersion = %d.%d.%d.%d\n" | |
1247 | " PercentUsed = %d\n", | |
1248 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1249 | mh->NoOfBinaryPartitions, | |
1250 | mh->NoOfBDTLPartitions, | |
1251 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1252 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1253 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1254 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1255 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1256 | mh->PercentUsed); | |
1da177e4 LT |
1257 | |
1258 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1259 | ||
1260 | blocks = mtd->size >> vshift; | |
1261 | if (blocks > 32768) { | |
1262 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1263 | goto out; | |
1264 | } | |
1265 | ||
1266 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1267 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1268 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1269 | goto out; | |
1270 | } | |
1271 | ||
1272 | /* Scan the partitions */ | |
1273 | for (i = 0; (i < 4); i++) { | |
1274 | ip = &(mh->Partitions[i]); | |
1275 | ip->virtualUnits = le32_to_cpu(ip->virtualUnits); | |
1276 | ip->firstUnit = le32_to_cpu(ip->firstUnit); | |
1277 | ip->lastUnit = le32_to_cpu(ip->lastUnit); | |
1278 | ip->flags = le32_to_cpu(ip->flags); | |
1279 | ip->spareUnits = le32_to_cpu(ip->spareUnits); | |
1280 | ip->Reserved0 = le32_to_cpu(ip->Reserved0); | |
1281 | ||
1da177e4 LT |
1282 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1283 | " virtualUnits = %d\n" | |
1284 | " firstUnit = %d\n" | |
1285 | " lastUnit = %d\n" | |
1286 | " flags = 0x%x\n" | |
1287 | " spareUnits = %d\n", | |
1288 | i, ip->virtualUnits, ip->firstUnit, | |
1289 | ip->lastUnit, ip->flags, | |
1290 | ip->spareUnits); | |
1da177e4 | 1291 | |
39605398 | 1292 | #if 0 |
1da177e4 LT |
1293 | if ((i == 0) && (ip->firstUnit > 0)) { |
1294 | parts[0].name = " DiskOnChip IPL / Media Header partition"; | |
1295 | parts[0].offset = 0; | |
1296 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1297 | numparts = 1; | |
1298 | } | |
39605398 | 1299 | #endif |
1da177e4 LT |
1300 | |
1301 | if (ip->flags & INFTL_BINARY) | |
1302 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1303 | else | |
1304 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1305 | parts[numparts].offset = ip->firstUnit << vshift; | |
1306 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1307 | numparts++; | |
1308 | if (ip->lastUnit > lastvunit) lastvunit = ip->lastUnit; | |
1309 | if (ip->flags & INFTL_LAST) break; | |
1310 | } | |
1311 | lastvunit++; | |
1312 | if ((lastvunit << vshift) < end) { | |
1313 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1314 | parts[numparts].offset = lastvunit << vshift; | |
1315 | parts[numparts].size = end - parts[numparts].offset; | |
1316 | numparts++; | |
1317 | } | |
1318 | ret = numparts; | |
1319 | out: | |
1320 | kfree(buf); | |
1321 | return ret; | |
1322 | } | |
1323 | ||
1324 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1325 | { | |
1326 | int ret, numparts; | |
1327 | struct nand_chip *this = mtd->priv; | |
1328 | struct doc_priv *doc = this->priv; | |
1329 | struct mtd_partition parts[2]; | |
1330 | ||
1331 | memset((char *) parts, 0, sizeof(parts)); | |
1332 | /* On NFTL, we have to find the media headers before we can read the | |
1333 | BBTs, since they're stored in the media header eraseblocks. */ | |
1334 | numparts = nftl_partscan(mtd, parts); | |
1335 | if (!numparts) return -EIO; | |
1336 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1337 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1338 | NAND_BBT_VERSION; | |
1339 | this->bbt_td->veroffs = 7; | |
1340 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1341 | if (doc->mh1_page != -1) { | |
1342 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1343 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1344 | NAND_BBT_VERSION; | |
1345 | this->bbt_md->veroffs = 7; | |
1346 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1347 | } else { | |
1348 | this->bbt_md = NULL; | |
1349 | } | |
1350 | ||
1351 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1352 | At least as nand_bbt.c is currently written. */ | |
1353 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1354 | return ret; | |
1355 | add_mtd_device(mtd); | |
1356 | #ifdef CONFIG_MTD_PARTITIONS | |
1357 | if (!no_autopart) | |
1358 | add_mtd_partitions(mtd, parts, numparts); | |
1359 | #endif | |
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1364 | { | |
1365 | int ret, numparts; | |
1366 | struct nand_chip *this = mtd->priv; | |
1367 | struct doc_priv *doc = this->priv; | |
1368 | struct mtd_partition parts[5]; | |
1369 | ||
1370 | if (this->numchips > doc->chips_per_floor) { | |
1371 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1372 | return -EIO; | |
1373 | } | |
1374 | ||
1375 | if (DoC_is_MillenniumPlus(doc)) { | |
1376 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1377 | if (inftl_bbt_write) | |
1378 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1379 | this->bbt_td->pages[0] = 2; | |
1380 | this->bbt_md = NULL; | |
1381 | } else { | |
1382 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | | |
1383 | NAND_BBT_VERSION; | |
1384 | if (inftl_bbt_write) | |
1385 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1386 | this->bbt_td->offs = 8; | |
1387 | this->bbt_td->len = 8; | |
1388 | this->bbt_td->veroffs = 7; | |
1389 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1390 | this->bbt_td->reserved_block_code = 0x01; | |
1391 | this->bbt_td->pattern = "MSYS_BBT"; | |
1392 | ||
1393 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | | |
1394 | NAND_BBT_VERSION; | |
1395 | if (inftl_bbt_write) | |
1396 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1397 | this->bbt_md->offs = 8; | |
1398 | this->bbt_md->len = 8; | |
1399 | this->bbt_md->veroffs = 7; | |
1400 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1401 | this->bbt_md->reserved_block_code = 0x01; | |
1402 | this->bbt_md->pattern = "TBB_SYSM"; | |
1403 | } | |
1404 | ||
1405 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1406 | At least as nand_bbt.c is currently written. */ | |
1407 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1408 | return ret; | |
1409 | memset((char *) parts, 0, sizeof(parts)); | |
1410 | numparts = inftl_partscan(mtd, parts); | |
1411 | /* At least for now, require the INFTL Media Header. We could probably | |
1412 | do without it for non-INFTL use, since all it gives us is | |
1413 | autopartitioning, but I want to give it more thought. */ | |
1414 | if (!numparts) return -EIO; | |
1415 | add_mtd_device(mtd); | |
1416 | #ifdef CONFIG_MTD_PARTITIONS | |
1417 | if (!no_autopart) | |
1418 | add_mtd_partitions(mtd, parts, numparts); | |
1419 | #endif | |
1420 | return 0; | |
1421 | } | |
1422 | ||
1423 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1424 | { | |
1425 | struct nand_chip *this = mtd->priv; | |
1426 | struct doc_priv *doc = this->priv; | |
1427 | ||
1428 | this->write_byte = doc2000_write_byte; | |
1429 | this->read_byte = doc2000_read_byte; | |
1430 | this->write_buf = doc2000_writebuf; | |
1431 | this->read_buf = doc2000_readbuf; | |
1432 | this->verify_buf = doc2000_verifybuf; | |
1433 | this->scan_bbt = nftl_scan_bbt; | |
1434 | ||
1435 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1436 | doc2000_count_chips(mtd); | |
1437 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1438 | return (4 * doc->chips_per_floor); | |
1439 | } | |
1440 | ||
1441 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1442 | { | |
1443 | struct nand_chip *this = mtd->priv; | |
1444 | struct doc_priv *doc = this->priv; | |
1445 | ||
1446 | this->write_byte = doc2001_write_byte; | |
1447 | this->read_byte = doc2001_read_byte; | |
1448 | this->write_buf = doc2001_writebuf; | |
1449 | this->read_buf = doc2001_readbuf; | |
1450 | this->verify_buf = doc2001_verifybuf; | |
1451 | ||
1452 | ReadDOC(doc->virtadr, ChipID); | |
1453 | ReadDOC(doc->virtadr, ChipID); | |
1454 | ReadDOC(doc->virtadr, ChipID); | |
1455 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1456 | /* It's not a Millennium; it's one of the newer | |
1457 | DiskOnChip 2000 units with a similar ASIC. | |
1458 | Treat it like a Millennium, except that it | |
1459 | can have multiple chips. */ | |
1460 | doc2000_count_chips(mtd); | |
1461 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1462 | this->scan_bbt = inftl_scan_bbt; | |
1463 | return (4 * doc->chips_per_floor); | |
1464 | } else { | |
1465 | /* Bog-standard Millennium */ | |
1466 | doc->chips_per_floor = 1; | |
1467 | mtd->name = "DiskOnChip Millennium"; | |
1468 | this->scan_bbt = nftl_scan_bbt; | |
1469 | return 1; | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1474 | { | |
1475 | struct nand_chip *this = mtd->priv; | |
1476 | struct doc_priv *doc = this->priv; | |
1477 | ||
1478 | this->write_byte = NULL; | |
1479 | this->read_byte = doc2001plus_read_byte; | |
1480 | this->write_buf = doc2001plus_writebuf; | |
1481 | this->read_buf = doc2001plus_readbuf; | |
1482 | this->verify_buf = doc2001plus_verifybuf; | |
1483 | this->scan_bbt = inftl_scan_bbt; | |
1484 | this->hwcontrol = NULL; | |
1485 | this->select_chip = doc2001plus_select_chip; | |
1486 | this->cmdfunc = doc2001plus_command; | |
1487 | this->enable_hwecc = doc2001plus_enable_hwecc; | |
1488 | ||
1489 | doc->chips_per_floor = 1; | |
1490 | mtd->name = "DiskOnChip Millennium Plus"; | |
1491 | ||
1492 | return 1; | |
1493 | } | |
1494 | ||
1495 | static inline int __init doc_probe(unsigned long physadr) | |
1496 | { | |
1497 | unsigned char ChipID; | |
1498 | struct mtd_info *mtd; | |
1499 | struct nand_chip *nand; | |
1500 | struct doc_priv *doc; | |
1501 | void __iomem *virtadr; | |
1502 | unsigned char save_control; | |
1503 | unsigned char tmp, tmpb, tmpc; | |
1504 | int reg, len, numchips; | |
1505 | int ret = 0; | |
1506 | ||
1507 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1508 | if (!virtadr) { | |
1509 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1510 | return -EIO; | |
1511 | } | |
1512 | ||
1513 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1514 | * bootup procedure will put the device into reset mode, and | |
1515 | * it's not possible to talk to it without actually writing | |
1516 | * to the DOCControl register. So we store the current contents | |
1517 | * of the DOCControl register's location, in case we later decide | |
1518 | * that it's not a DiskOnChip, and want to put it back how we | |
1519 | * found it. | |
1520 | */ | |
1521 | save_control = ReadDOC(virtadr, DOCControl); | |
1522 | ||
1523 | /* Reset the DiskOnChip ASIC */ | |
1524 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1525 | virtadr, DOCControl); | |
1526 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, | |
1527 | virtadr, DOCControl); | |
1528 | ||
1529 | /* Enable the DiskOnChip ASIC */ | |
1530 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1531 | virtadr, DOCControl); | |
1532 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, | |
1533 | virtadr, DOCControl); | |
1534 | ||
1535 | ChipID = ReadDOC(virtadr, ChipID); | |
1536 | ||
1537 | switch(ChipID) { | |
1538 | case DOC_ChipID_Doc2k: | |
1539 | reg = DoC_2k_ECCStatus; | |
1540 | break; | |
1541 | case DOC_ChipID_DocMil: | |
1542 | reg = DoC_ECCConf; | |
1543 | break; | |
1544 | case DOC_ChipID_DocMilPlus16: | |
1545 | case DOC_ChipID_DocMilPlus32: | |
1546 | case 0: | |
1547 | /* Possible Millennium Plus, need to do more checks */ | |
1548 | /* Possibly release from power down mode */ | |
1549 | for (tmp = 0; (tmp < 4); tmp++) | |
1550 | ReadDOC(virtadr, Mplus_Power); | |
1551 | ||
1552 | /* Reset the Millennium Plus ASIC */ | |
1553 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | | |
1554 | DOC_MODE_BDECT; | |
1555 | WriteDOC(tmp, virtadr, Mplus_DOCControl); | |
1556 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1557 | ||
1558 | mdelay(1); | |
1559 | /* Enable the Millennium Plus ASIC */ | |
1560 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | | |
1561 | DOC_MODE_BDECT; | |
1562 | WriteDOC(tmp, virtadr, Mplus_DOCControl); | |
1563 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1564 | mdelay(1); | |
1565 | ||
1566 | ChipID = ReadDOC(virtadr, ChipID); | |
1567 | ||
1568 | switch (ChipID) { | |
1569 | case DOC_ChipID_DocMilPlus16: | |
1570 | reg = DoC_Mplus_Toggle; | |
1571 | break; | |
1572 | case DOC_ChipID_DocMilPlus32: | |
1573 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1574 | default: | |
1575 | ret = -ENODEV; | |
1576 | goto notfound; | |
1577 | } | |
1578 | break; | |
1579 | ||
1580 | default: | |
1581 | ret = -ENODEV; | |
1582 | goto notfound; | |
1583 | } | |
1584 | /* Check the TOGGLE bit in the ECC register */ | |
1585 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1586 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1587 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1588 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1589 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1590 | ret = -ENODEV; | |
1591 | goto notfound; | |
1592 | } | |
1593 | ||
1594 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1595 | unsigned char oldval; | |
1596 | unsigned char newval; | |
1597 | nand = mtd->priv; | |
1598 | doc = nand->priv; | |
1599 | /* Use the alias resolution register to determine if this is | |
1600 | in fact the same DOC aliased to a new address. If writes | |
1601 | to one chip's alias resolution register change the value on | |
1602 | the other chip, they're the same chip. */ | |
1603 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1604 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1605 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1606 | } else { | |
1607 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1608 | newval = ReadDOC(virtadr, AliasResolution); | |
1609 | } | |
1610 | if (oldval != newval) | |
1611 | continue; | |
1612 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1613 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1614 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1615 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it | |
1616 | } else { | |
1617 | WriteDOC(~newval, virtadr, AliasResolution); | |
1618 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1619 | WriteDOC(newval, virtadr, AliasResolution); // restore it | |
1620 | } | |
1621 | newval = ~newval; | |
1622 | if (oldval == newval) { | |
1623 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1624 | goto notfound; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1629 | ||
1630 | len = sizeof(struct mtd_info) + | |
1631 | sizeof(struct nand_chip) + | |
1632 | sizeof(struct doc_priv) + | |
1633 | (2 * sizeof(struct nand_bbt_descr)); | |
1634 | mtd = kmalloc(len, GFP_KERNEL); | |
1635 | if (!mtd) { | |
1636 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1637 | ret = -ENOMEM; | |
1638 | goto fail; | |
1639 | } | |
1640 | memset(mtd, 0, len); | |
1641 | ||
1642 | nand = (struct nand_chip *) (mtd + 1); | |
1643 | doc = (struct doc_priv *) (nand + 1); | |
1644 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1645 | nand->bbt_md = nand->bbt_td + 1; | |
1646 | ||
1647 | mtd->priv = nand; | |
1648 | mtd->owner = THIS_MODULE; | |
1649 | ||
1650 | nand->priv = doc; | |
1651 | nand->select_chip = doc200x_select_chip; | |
1652 | nand->hwcontrol = doc200x_hwcontrol; | |
1653 | nand->dev_ready = doc200x_dev_ready; | |
1654 | nand->waitfunc = doc200x_wait; | |
1655 | nand->block_bad = doc200x_block_bad; | |
1656 | nand->enable_hwecc = doc200x_enable_hwecc; | |
1657 | nand->calculate_ecc = doc200x_calculate_ecc; | |
1658 | nand->correct_data = doc200x_correct_data; | |
1659 | ||
1660 | nand->autooob = &doc200x_oobinfo; | |
1661 | nand->eccmode = NAND_ECC_HW6_512; | |
1662 | nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME; | |
1663 | ||
1664 | doc->physadr = physadr; | |
1665 | doc->virtadr = virtadr; | |
1666 | doc->ChipID = ChipID; | |
1667 | doc->curfloor = -1; | |
1668 | doc->curchip = -1; | |
1669 | doc->mh0_page = -1; | |
1670 | doc->mh1_page = -1; | |
1671 | doc->nextdoc = doclist; | |
1672 | ||
1673 | if (ChipID == DOC_ChipID_Doc2k) | |
1674 | numchips = doc2000_init(mtd); | |
1675 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1676 | numchips = doc2001plus_init(mtd); | |
1677 | else | |
1678 | numchips = doc2001_init(mtd); | |
1679 | ||
1680 | if ((ret = nand_scan(mtd, numchips))) { | |
1681 | /* DBB note: i believe nand_release is necessary here, as | |
1682 | buffers may have been allocated in nand_base. Check with | |
1683 | Thomas. FIX ME! */ | |
1684 | /* nand_release will call del_mtd_device, but we haven't yet | |
1685 | added it. This is handled without incident by | |
1686 | del_mtd_device, as far as I can tell. */ | |
1687 | nand_release(mtd); | |
1688 | kfree(mtd); | |
1689 | goto fail; | |
1690 | } | |
1691 | ||
1692 | /* Success! */ | |
1693 | doclist = mtd; | |
1694 | return 0; | |
1695 | ||
1696 | notfound: | |
1697 | /* Put back the contents of the DOCControl register, in case it's not | |
1698 | actually a DiskOnChip. */ | |
1699 | WriteDOC(save_control, virtadr, DOCControl); | |
1700 | fail: | |
1701 | iounmap(virtadr); | |
1702 | return ret; | |
1703 | } | |
1704 | ||
1705 | static void release_nanddoc(void) | |
1706 | { | |
1707 | struct mtd_info *mtd, *nextmtd; | |
1708 | struct nand_chip *nand; | |
1709 | struct doc_priv *doc; | |
1710 | ||
1711 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1712 | nand = mtd->priv; | |
1713 | doc = nand->priv; | |
1714 | ||
1715 | nextmtd = doc->nextdoc; | |
1716 | nand_release(mtd); | |
1717 | iounmap(doc->virtadr); | |
1718 | kfree(mtd); | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | static int __init init_nanddoc(void) | |
1723 | { | |
1724 | int i, ret = 0; | |
1725 | ||
1726 | /* We could create the decoder on demand, if memory is a concern. | |
1727 | * This way we have it handy, if an error happens | |
1728 | * | |
1729 | * Symbolsize is 10 (bits) | |
1730 | * Primitve polynomial is x^10+x^3+1 | |
1731 | * first consecutive root is 510 | |
1732 | * primitve element to generate roots = 1 | |
1733 | * generator polinomial degree = 4 | |
1734 | */ | |
1735 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
1736 | if (!rs_decoder) { | |
1737 | printk (KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1738 | return -ENOMEM; | |
1739 | } | |
1740 | ||
1741 | if (doc_config_location) { | |
1742 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1743 | ret = doc_probe(doc_config_location); | |
1744 | if (ret < 0) | |
1745 | goto outerr; | |
1746 | } else { | |
1747 | for (i=0; (doc_locations[i] != 0xffffffff); i++) { | |
1748 | doc_probe(doc_locations[i]); | |
1749 | } | |
1750 | } | |
1751 | /* No banner message any more. Print a message if no DiskOnChip | |
1752 | found, so the user knows we at least tried. */ | |
1753 | if (!doclist) { | |
1754 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1755 | ret = -ENODEV; | |
1756 | goto outerr; | |
1757 | } | |
1758 | return 0; | |
1759 | outerr: | |
1760 | free_rs(rs_decoder); | |
1761 | return ret; | |
1762 | } | |
1763 | ||
1764 | static void __exit cleanup_nanddoc(void) | |
1765 | { | |
1766 | /* Cleanup the nand/DoC resources */ | |
1767 | release_nanddoc(); | |
1768 | ||
1769 | /* Free the reed solomon resources */ | |
1770 | if (rs_decoder) { | |
1771 | free_rs(rs_decoder); | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | module_init(init_nanddoc); | |
1776 | module_exit(cleanup_nanddoc); | |
1777 | ||
1778 | MODULE_LICENSE("GPL"); | |
1779 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1780 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); |