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Commit | Line | Data |
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61b03bd7 | 1 | /* |
1da177e4 LT |
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> | |
61b03bd7 | 11 | * |
1da177e4 | 12 | * Error correction code lifted from the old docecc code |
61b03bd7 | 13 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) |
1da177e4 LT |
14 | * Copyright (C) 2000 Netgem S.A. |
15 | * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de> | |
61b03bd7 | 16 | * |
1da177e4 LT |
17 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
18 | * | |
61b03bd7 | 19 | * $Id: diskonchip.c,v 1.55 2005/11/07 11:14:30 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 |
61b03bd7 | 45 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
1da177e4 | 46 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
61b03bd7 TG |
47 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
48 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
1da177e4 LT |
49 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
50 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ | |
61b03bd7 | 51 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
1da177e4 | 52 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
61b03bd7 TG |
53 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
54 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
1da177e4 LT |
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 | ||
1da177e4 LT |
84 | /* This is the syndrome computed by the HW ecc generator upon reading an empty |
85 | page, one with all 0xff for data and stored ecc code. */ | |
86 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
87 | /* This is the ecc value computed by the HW ecc generator upon writing an empty | |
88 | page, one with all 0xff for data. */ | |
89 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
90 | ||
91 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
92 | ||
93 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
94 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
95 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
96 | ||
97 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd); | |
98 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); | |
99 | ||
100 | static int debug=0; | |
101 | module_param(debug, int, 0); | |
102 | ||
103 | static int try_dword=1; | |
104 | module_param(try_dword, int, 0); | |
105 | ||
106 | static int no_ecc_failures=0; | |
107 | module_param(no_ecc_failures, int, 0); | |
108 | ||
1da177e4 LT |
109 | static int no_autopart=0; |
110 | module_param(no_autopart, int, 0); | |
1a78ff6b DB |
111 | |
112 | static int show_firmware_partition=0; | |
113 | module_param(show_firmware_partition, int, 0); | |
1da177e4 LT |
114 | |
115 | #ifdef MTD_NAND_DISKONCHIP_BBTWRITE | |
116 | static int inftl_bbt_write=1; | |
117 | #else | |
118 | static int inftl_bbt_write=0; | |
119 | #endif | |
120 | module_param(inftl_bbt_write, int, 0); | |
121 | ||
651078ba | 122 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
123 | module_param(doc_config_location, ulong, 0); |
124 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
125 | ||
126 | ||
127 | /* Sector size for HW ECC */ | |
128 | #define SECTOR_SIZE 512 | |
129 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
130 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
131 | /* Number of roots */ | |
132 | #define NROOTS 4 | |
133 | /* First consective root */ | |
134 | #define FCR 510 | |
135 | /* Number of symbols */ | |
136 | #define NN 1023 | |
137 | ||
138 | /* the Reed Solomon control structure */ | |
139 | static struct rs_control *rs_decoder; | |
140 | ||
61b03bd7 | 141 | /* |
1da177e4 LT |
142 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
143 | * which we must convert to a standard syndrom usable by the generic | |
144 | * Reed-Solomon library code. | |
145 | * | |
146 | * Fabrice Bellard figured this out in the old docecc code. I added | |
147 | * some comments, improved a minor bit and converted it to make use | |
148 | * of the generic Reed-Solomon libary. tglx | |
149 | */ | |
150 | static int doc_ecc_decode (struct rs_control *rs, uint8_t *data, uint8_t *ecc) | |
151 | { | |
152 | int i, j, nerr, errpos[8]; | |
153 | uint8_t parity; | |
154 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
155 | ||
156 | /* Convert the ecc bytes into words */ | |
157 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
158 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
159 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
160 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
161 | parity = ecc[1]; | |
162 | ||
163 | /* Initialize the syndrom buffer */ | |
164 | for (i = 0; i < NROOTS; i++) | |
165 | s[i] = ds[0]; | |
61b03bd7 TG |
166 | /* |
167 | * Evaluate | |
1da177e4 LT |
168 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
169 | * where x = alpha^(FCR + i) | |
170 | */ | |
171 | for(j = 1; j < NROOTS; j++) { | |
172 | if(ds[j] == 0) | |
173 | continue; | |
174 | tmp = rs->index_of[ds[j]]; | |
175 | for(i = 0; i < NROOTS; i++) | |
176 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; | |
177 | } | |
178 | ||
179 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
180 | for (i = 0; i < NROOTS; i++) { | |
181 | if (syn[i]) | |
182 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); | |
183 | } | |
184 | /* Call the decoder library */ | |
185 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
186 | ||
187 | /* Incorrectable errors ? */ | |
188 | if (nerr < 0) | |
189 | return nerr; | |
190 | ||
61b03bd7 | 191 | /* |
1da177e4 LT |
192 | * Correct the errors. The bitpositions are a bit of magic, |
193 | * but they are given by the design of the de/encoder circuit | |
194 | * in the DoC ASIC's. | |
195 | */ | |
196 | for(i = 0;i < nerr; i++) { | |
197 | int index, bitpos, pos = 1015 - errpos[i]; | |
198 | uint8_t val; | |
199 | if (pos >= NB_DATA && pos < 1019) | |
200 | continue; | |
201 | if (pos < NB_DATA) { | |
202 | /* extract bit position (MSB first) */ | |
203 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
204 | /* now correct the following 10 bits. At most two bytes | |
205 | can be modified since pos is even */ | |
206 | index = (pos >> 3) ^ 1; | |
207 | bitpos = pos & 7; | |
61b03bd7 | 208 | if ((index >= 0 && index < SECTOR_SIZE) || |
1da177e4 LT |
209 | index == (SECTOR_SIZE + 1)) { |
210 | val = (uint8_t) (errval[i] >> (2 + bitpos)); | |
211 | parity ^= val; | |
212 | if (index < SECTOR_SIZE) | |
213 | data[index] ^= val; | |
214 | } | |
215 | index = ((pos >> 3) + 1) ^ 1; | |
216 | bitpos = (bitpos + 10) & 7; | |
217 | if (bitpos == 0) | |
218 | bitpos = 8; | |
61b03bd7 | 219 | if ((index >= 0 && index < SECTOR_SIZE) || |
1da177e4 LT |
220 | index == (SECTOR_SIZE + 1)) { |
221 | val = (uint8_t)(errval[i] << (8 - bitpos)); | |
222 | parity ^= val; | |
223 | if (index < SECTOR_SIZE) | |
224 | data[index] ^= val; | |
225 | } | |
226 | } | |
227 | } | |
228 | /* If the parity is wrong, no rescue possible */ | |
229 | return parity ? -1 : nerr; | |
230 | } | |
231 | ||
232 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
233 | { | |
234 | volatile char dummy; | |
235 | int i; | |
61b03bd7 | 236 | |
1da177e4 LT |
237 | for (i = 0; i < cycles; i++) { |
238 | if (DoC_is_Millennium(doc)) | |
239 | dummy = ReadDOC(doc->virtadr, NOP); | |
240 | else if (DoC_is_MillenniumPlus(doc)) | |
241 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
242 | else | |
243 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
244 | } | |
61b03bd7 | 245 | |
1da177e4 LT |
246 | } |
247 | ||
248 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
249 | ||
250 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
251 | static int _DoC_WaitReady(struct doc_priv *doc) | |
252 | { | |
253 | void __iomem *docptr = doc->virtadr; | |
254 | unsigned long timeo = jiffies + (HZ * 10); | |
255 | ||
256 | if(debug) printk("_DoC_WaitReady...\n"); | |
257 | /* Out-of-line routine to wait for chip response */ | |
258 | if (DoC_is_MillenniumPlus(doc)) { | |
259 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
260 | if (time_after(jiffies, timeo)) { | |
261 | printk("_DoC_WaitReady timed out.\n"); | |
262 | return -EIO; | |
263 | } | |
264 | udelay(1); | |
265 | cond_resched(); | |
266 | } | |
267 | } else { | |
268 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
269 | if (time_after(jiffies, timeo)) { | |
270 | printk("_DoC_WaitReady timed out.\n"); | |
271 | return -EIO; | |
272 | } | |
273 | udelay(1); | |
274 | cond_resched(); | |
275 | } | |
276 | } | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
282 | { | |
283 | void __iomem *docptr = doc->virtadr; | |
284 | int ret = 0; | |
285 | ||
286 | if (DoC_is_MillenniumPlus(doc)) { | |
287 | DoC_Delay(doc, 4); | |
288 | ||
289 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
290 | /* Call the out-of-line routine to wait */ | |
291 | ret = _DoC_WaitReady(doc); | |
292 | } else { | |
293 | DoC_Delay(doc, 4); | |
294 | ||
295 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
296 | /* Call the out-of-line routine to wait */ | |
297 | ret = _DoC_WaitReady(doc); | |
298 | DoC_Delay(doc, 2); | |
299 | } | |
300 | ||
301 | if(debug) printk("DoC_WaitReady OK\n"); | |
302 | return ret; | |
303 | } | |
304 | ||
305 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
306 | { | |
307 | struct nand_chip *this = mtd->priv; | |
308 | struct doc_priv *doc = this->priv; | |
309 | void __iomem *docptr = doc->virtadr; | |
310 | ||
311 | if(debug)printk("write_byte %02x\n", datum); | |
312 | WriteDOC(datum, docptr, CDSNSlowIO); | |
313 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
314 | } | |
315 | ||
316 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
317 | { | |
318 | struct nand_chip *this = mtd->priv; | |
319 | struct doc_priv *doc = this->priv; | |
320 | void __iomem *docptr = doc->virtadr; | |
321 | u_char ret; | |
322 | ||
323 | ReadDOC(docptr, CDSNSlowIO); | |
324 | DoC_Delay(doc, 2); | |
325 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
326 | if (debug) printk("read_byte returns %02x\n", ret); | |
327 | return ret; | |
328 | } | |
329 | ||
61b03bd7 | 330 | static void doc2000_writebuf(struct mtd_info *mtd, |
1da177e4 LT |
331 | const u_char *buf, int len) |
332 | { | |
333 | struct nand_chip *this = mtd->priv; | |
334 | struct doc_priv *doc = this->priv; | |
335 | void __iomem *docptr = doc->virtadr; | |
336 | int i; | |
337 | if (debug)printk("writebuf of %d bytes: ", len); | |
338 | for (i=0; i < len; i++) { | |
339 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); | |
340 | if (debug && i < 16) | |
341 | printk("%02x ", buf[i]); | |
342 | } | |
343 | if (debug) printk("\n"); | |
344 | } | |
345 | ||
61b03bd7 | 346 | static void doc2000_readbuf(struct mtd_info *mtd, |
1da177e4 LT |
347 | u_char *buf, int len) |
348 | { | |
349 | struct nand_chip *this = mtd->priv; | |
350 | struct doc_priv *doc = this->priv; | |
351 | void __iomem *docptr = doc->virtadr; | |
352 | int i; | |
353 | ||
354 | if (debug)printk("readbuf of %d bytes: ", len); | |
355 | ||
356 | for (i=0; i < len; i++) { | |
357 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); | |
358 | } | |
359 | } | |
360 | ||
61b03bd7 | 361 | static void doc2000_readbuf_dword(struct mtd_info *mtd, |
1da177e4 LT |
362 | u_char *buf, int len) |
363 | { | |
364 | struct nand_chip *this = mtd->priv; | |
365 | struct doc_priv *doc = this->priv; | |
366 | void __iomem *docptr = doc->virtadr; | |
367 | int i; | |
368 | ||
369 | if (debug) printk("readbuf_dword of %d bytes: ", len); | |
370 | ||
371 | if (unlikely((((unsigned long)buf)|len) & 3)) { | |
372 | for (i=0; i < len; i++) { | |
373 | *(uint8_t *)(&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
374 | } | |
375 | } else { | |
376 | for (i=0; i < len; i+=4) { | |
377 | *(uint32_t*)(&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
378 | } | |
379 | } | |
380 | } | |
381 | ||
61b03bd7 | 382 | static int doc2000_verifybuf(struct mtd_info *mtd, |
1da177e4 LT |
383 | const u_char *buf, int len) |
384 | { | |
385 | struct nand_chip *this = mtd->priv; | |
386 | struct doc_priv *doc = this->priv; | |
387 | void __iomem *docptr = doc->virtadr; | |
388 | int i; | |
389 | ||
390 | for (i=0; i < len; i++) | |
391 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) | |
392 | return -EFAULT; | |
393 | return 0; | |
394 | } | |
395 | ||
396 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
397 | { | |
398 | struct nand_chip *this = mtd->priv; | |
399 | struct doc_priv *doc = this->priv; | |
400 | uint16_t ret; | |
401 | ||
402 | doc200x_select_chip(mtd, nr); | |
403 | doc200x_hwcontrol(mtd, NAND_CTL_SETCLE); | |
404 | this->write_byte(mtd, NAND_CMD_READID); | |
405 | doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE); | |
406 | doc200x_hwcontrol(mtd, NAND_CTL_SETALE); | |
407 | this->write_byte(mtd, 0); | |
408 | doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); | |
61b03bd7 | 409 | |
dfd61294 | 410 | /* We cant' use dev_ready here, but at least we wait for the |
61b03bd7 | 411 | * command to complete |
dfd61294 TG |
412 | */ |
413 | udelay(50); | |
61b03bd7 | 414 | |
1da177e4 LT |
415 | ret = this->read_byte(mtd) << 8; |
416 | ret |= this->read_byte(mtd); | |
417 | ||
418 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
419 | /* First chip probe. See if we get same results by 32-bit access */ | |
420 | union { | |
421 | uint32_t dword; | |
422 | uint8_t byte[4]; | |
423 | } ident; | |
424 | void __iomem *docptr = doc->virtadr; | |
425 | ||
426 | doc200x_hwcontrol(mtd, NAND_CTL_SETCLE); | |
427 | doc2000_write_byte(mtd, NAND_CMD_READID); | |
428 | doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE); | |
429 | doc200x_hwcontrol(mtd, NAND_CTL_SETALE); | |
430 | doc2000_write_byte(mtd, 0); | |
431 | doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); | |
432 | ||
dfd61294 TG |
433 | udelay(50); |
434 | ||
1da177e4 LT |
435 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
436 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
437 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
438 | this->read_buf = &doc2000_readbuf_dword; | |
439 | } | |
440 | } | |
61b03bd7 | 441 | |
1da177e4 LT |
442 | return ret; |
443 | } | |
444 | ||
445 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
446 | { | |
447 | struct nand_chip *this = mtd->priv; | |
448 | struct doc_priv *doc = this->priv; | |
449 | uint16_t mfrid; | |
450 | int i; | |
451 | ||
452 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
453 | doc->chips_per_floor = 4; | |
454 | ||
455 | /* Find out what the first chip is */ | |
456 | mfrid = doc200x_ident_chip(mtd, 0); | |
457 | ||
458 | /* Find how many chips in each floor. */ | |
459 | for (i = 1; i < 4; i++) { | |
460 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
461 | break; | |
462 | } | |
463 | doc->chips_per_floor = i; | |
464 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
465 | } | |
466 | ||
467 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
468 | { | |
469 | struct doc_priv *doc = this->priv; | |
470 | ||
471 | int status; | |
61b03bd7 | 472 | |
1da177e4 LT |
473 | DoC_WaitReady(doc); |
474 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
475 | DoC_WaitReady(doc); | |
476 | status = (int)this->read_byte(mtd); | |
477 | ||
478 | return status; | |
479 | } | |
480 | ||
481 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
482 | { | |
483 | struct nand_chip *this = mtd->priv; | |
484 | struct doc_priv *doc = this->priv; | |
485 | void __iomem *docptr = doc->virtadr; | |
486 | ||
487 | WriteDOC(datum, docptr, CDSNSlowIO); | |
488 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
489 | WriteDOC(datum, docptr, WritePipeTerm); | |
490 | } | |
491 | ||
492 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
493 | { | |
494 | struct nand_chip *this = mtd->priv; | |
495 | struct doc_priv *doc = this->priv; | |
496 | void __iomem *docptr = doc->virtadr; | |
497 | ||
498 | //ReadDOC(docptr, CDSNSlowIO); | |
499 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
500 | DoC_Delay(doc, 2); | |
501 | ReadDOC(docptr, ReadPipeInit); | |
502 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
503 | return ReadDOC(docptr, LastDataRead); | |
504 | } | |
505 | ||
61b03bd7 | 506 | static void doc2001_writebuf(struct mtd_info *mtd, |
1da177e4 LT |
507 | const u_char *buf, int len) |
508 | { | |
509 | struct nand_chip *this = mtd->priv; | |
510 | struct doc_priv *doc = this->priv; | |
511 | void __iomem *docptr = doc->virtadr; | |
512 | int i; | |
513 | ||
514 | for (i=0; i < len; i++) | |
515 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); | |
516 | /* Terminate write pipeline */ | |
517 | WriteDOC(0x00, docptr, WritePipeTerm); | |
518 | } | |
519 | ||
61b03bd7 | 520 | static void doc2001_readbuf(struct mtd_info *mtd, |
1da177e4 LT |
521 | u_char *buf, int len) |
522 | { | |
523 | struct nand_chip *this = mtd->priv; | |
524 | struct doc_priv *doc = this->priv; | |
525 | void __iomem *docptr = doc->virtadr; | |
526 | int i; | |
527 | ||
528 | /* Start read pipeline */ | |
529 | ReadDOC(docptr, ReadPipeInit); | |
530 | ||
531 | for (i=0; i < len-1; i++) | |
532 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); | |
533 | ||
534 | /* Terminate read pipeline */ | |
535 | buf[i] = ReadDOC(docptr, LastDataRead); | |
536 | } | |
537 | ||
61b03bd7 | 538 | static int doc2001_verifybuf(struct mtd_info *mtd, |
1da177e4 LT |
539 | const u_char *buf, int len) |
540 | { | |
541 | struct nand_chip *this = mtd->priv; | |
542 | struct doc_priv *doc = this->priv; | |
543 | void __iomem *docptr = doc->virtadr; | |
544 | int i; | |
545 | ||
546 | /* Start read pipeline */ | |
547 | ReadDOC(docptr, ReadPipeInit); | |
548 | ||
549 | for (i=0; i < len-1; i++) | |
550 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { | |
551 | ReadDOC(docptr, LastDataRead); | |
552 | return i; | |
553 | } | |
554 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
555 | return i; | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
560 | { | |
561 | struct nand_chip *this = mtd->priv; | |
562 | struct doc_priv *doc = this->priv; | |
563 | void __iomem *docptr = doc->virtadr; | |
564 | u_char ret; | |
565 | ||
566 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
567 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
568 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
569 | if (debug) printk("read_byte returns %02x\n", ret); | |
570 | return ret; | |
571 | } | |
572 | ||
61b03bd7 | 573 | static void doc2001plus_writebuf(struct mtd_info *mtd, |
1da177e4 LT |
574 | const u_char *buf, int len) |
575 | { | |
576 | struct nand_chip *this = mtd->priv; | |
577 | struct doc_priv *doc = this->priv; | |
578 | void __iomem *docptr = doc->virtadr; | |
579 | int i; | |
580 | ||
581 | if (debug)printk("writebuf of %d bytes: ", len); | |
582 | for (i=0; i < len; i++) { | |
583 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); | |
584 | if (debug && i < 16) | |
585 | printk("%02x ", buf[i]); | |
586 | } | |
587 | if (debug) printk("\n"); | |
588 | } | |
589 | ||
61b03bd7 | 590 | static void doc2001plus_readbuf(struct mtd_info *mtd, |
1da177e4 LT |
591 | u_char *buf, int len) |
592 | { | |
593 | struct nand_chip *this = mtd->priv; | |
594 | struct doc_priv *doc = this->priv; | |
595 | void __iomem *docptr = doc->virtadr; | |
596 | int i; | |
597 | ||
598 | if (debug)printk("readbuf of %d bytes: ", len); | |
599 | ||
600 | /* Start read pipeline */ | |
601 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
602 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
603 | ||
604 | for (i=0; i < len-2; i++) { | |
605 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); | |
606 | if (debug && i < 16) | |
607 | printk("%02x ", buf[i]); | |
608 | } | |
609 | ||
610 | /* Terminate read pipeline */ | |
611 | buf[len-2] = ReadDOC(docptr, Mplus_LastDataRead); | |
612 | if (debug && i < 16) | |
613 | printk("%02x ", buf[len-2]); | |
614 | buf[len-1] = ReadDOC(docptr, Mplus_LastDataRead); | |
615 | if (debug && i < 16) | |
616 | printk("%02x ", buf[len-1]); | |
617 | if (debug) printk("\n"); | |
618 | } | |
619 | ||
61b03bd7 | 620 | static int doc2001plus_verifybuf(struct mtd_info *mtd, |
1da177e4 LT |
621 | const u_char *buf, int len) |
622 | { | |
623 | struct nand_chip *this = mtd->priv; | |
624 | struct doc_priv *doc = this->priv; | |
625 | void __iomem *docptr = doc->virtadr; | |
626 | int i; | |
627 | ||
628 | if (debug)printk("verifybuf of %d bytes: ", len); | |
629 | ||
630 | /* Start read pipeline */ | |
631 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
632 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
633 | ||
634 | for (i=0; i < len-2; i++) | |
635 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { | |
636 | ReadDOC(docptr, Mplus_LastDataRead); | |
637 | ReadDOC(docptr, Mplus_LastDataRead); | |
638 | return i; | |
639 | } | |
640 | if (buf[len-2] != ReadDOC(docptr, Mplus_LastDataRead)) | |
641 | return len-2; | |
642 | if (buf[len-1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
643 | return len-1; | |
644 | return 0; | |
645 | } | |
646 | ||
647 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
648 | { | |
649 | struct nand_chip *this = mtd->priv; | |
650 | struct doc_priv *doc = this->priv; | |
651 | void __iomem *docptr = doc->virtadr; | |
652 | int floor = 0; | |
653 | ||
654 | if(debug)printk("select chip (%d)\n", chip); | |
655 | ||
656 | if (chip == -1) { | |
657 | /* Disable flash internally */ | |
658 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
659 | return; | |
660 | } | |
661 | ||
662 | floor = chip / doc->chips_per_floor; | |
663 | chip -= (floor * doc->chips_per_floor); | |
664 | ||
665 | /* Assert ChipEnable and deassert WriteProtect */ | |
666 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
667 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
668 | ||
669 | doc->curchip = chip; | |
670 | doc->curfloor = floor; | |
671 | } | |
672 | ||
673 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
674 | { | |
675 | struct nand_chip *this = mtd->priv; | |
676 | struct doc_priv *doc = this->priv; | |
677 | void __iomem *docptr = doc->virtadr; | |
678 | int floor = 0; | |
679 | ||
680 | if(debug)printk("select chip (%d)\n", chip); | |
681 | ||
682 | if (chip == -1) | |
683 | return; | |
684 | ||
685 | floor = chip / doc->chips_per_floor; | |
686 | chip -= (floor * doc->chips_per_floor); | |
687 | ||
688 | /* 11.4.4 -- deassert CE before changing chip */ | |
689 | doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE); | |
690 | ||
691 | WriteDOC(floor, docptr, FloorSelect); | |
692 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
693 | ||
694 | doc200x_hwcontrol(mtd, NAND_CTL_SETNCE); | |
695 | ||
696 | doc->curchip = chip; | |
697 | doc->curfloor = floor; | |
698 | } | |
699 | ||
700 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd) | |
701 | { | |
702 | struct nand_chip *this = mtd->priv; | |
703 | struct doc_priv *doc = this->priv; | |
704 | void __iomem *docptr = doc->virtadr; | |
705 | ||
706 | switch(cmd) { | |
707 | case NAND_CTL_SETNCE: | |
708 | doc->CDSNControl |= CDSN_CTRL_CE; | |
709 | break; | |
710 | case NAND_CTL_CLRNCE: | |
711 | doc->CDSNControl &= ~CDSN_CTRL_CE; | |
712 | break; | |
713 | case NAND_CTL_SETCLE: | |
714 | doc->CDSNControl |= CDSN_CTRL_CLE; | |
715 | break; | |
716 | case NAND_CTL_CLRCLE: | |
717 | doc->CDSNControl &= ~CDSN_CTRL_CLE; | |
718 | break; | |
719 | case NAND_CTL_SETALE: | |
720 | doc->CDSNControl |= CDSN_CTRL_ALE; | |
721 | break; | |
722 | case NAND_CTL_CLRALE: | |
723 | doc->CDSNControl &= ~CDSN_CTRL_ALE; | |
724 | break; | |
725 | case NAND_CTL_SETWP: | |
726 | doc->CDSNControl |= CDSN_CTRL_WP; | |
727 | break; | |
728 | case NAND_CTL_CLRWP: | |
729 | doc->CDSNControl &= ~CDSN_CTRL_WP; | |
730 | break; | |
731 | } | |
732 | if (debug)printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
733 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
734 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
735 | DoC_Delay(doc, 4); | |
736 | } | |
737 | ||
738 | static void doc2001plus_command (struct mtd_info *mtd, unsigned command, int column, int page_addr) | |
739 | { | |
740 | struct nand_chip *this = mtd->priv; | |
741 | struct doc_priv *doc = this->priv; | |
742 | void __iomem *docptr = doc->virtadr; | |
743 | ||
744 | /* | |
745 | * Must terminate write pipeline before sending any commands | |
746 | * to the device. | |
747 | */ | |
748 | if (command == NAND_CMD_PAGEPROG) { | |
749 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
750 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
751 | } | |
752 | ||
753 | /* | |
754 | * Write out the command to the device. | |
755 | */ | |
756 | if (command == NAND_CMD_SEQIN) { | |
757 | int readcmd; | |
758 | ||
759 | if (column >= mtd->oobblock) { | |
760 | /* OOB area */ | |
761 | column -= mtd->oobblock; | |
762 | readcmd = NAND_CMD_READOOB; | |
763 | } else if (column < 256) { | |
764 | /* First 256 bytes --> READ0 */ | |
765 | readcmd = NAND_CMD_READ0; | |
766 | } else { | |
767 | column -= 256; | |
768 | readcmd = NAND_CMD_READ1; | |
769 | } | |
770 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
771 | } | |
772 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
773 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
774 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
775 | ||
776 | if (column != -1 || page_addr != -1) { | |
777 | /* Serially input address */ | |
778 | if (column != -1) { | |
779 | /* Adjust columns for 16 bit buswidth */ | |
780 | if (this->options & NAND_BUSWIDTH_16) | |
781 | column >>= 1; | |
782 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
783 | } | |
784 | if (page_addr != -1) { | |
785 | WriteDOC((unsigned char) (page_addr & 0xff), docptr, Mplus_FlashAddress); | |
786 | WriteDOC((unsigned char) ((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
787 | /* One more address cycle for higher density devices */ | |
788 | if (this->chipsize & 0x0c000000) { | |
789 | WriteDOC((unsigned char) ((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); | |
790 | printk("high density\n"); | |
791 | } | |
792 | } | |
793 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
794 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
795 | /* deassert ALE */ | |
796 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
797 | WriteDOC(0, docptr, Mplus_FlashControl); | |
798 | } | |
799 | ||
61b03bd7 | 800 | /* |
1da177e4 LT |
801 | * program and erase have their own busy handlers |
802 | * status and sequential in needs no delay | |
803 | */ | |
804 | switch (command) { | |
805 | ||
806 | case NAND_CMD_PAGEPROG: | |
807 | case NAND_CMD_ERASE1: | |
808 | case NAND_CMD_ERASE2: | |
809 | case NAND_CMD_SEQIN: | |
810 | case NAND_CMD_STATUS: | |
811 | return; | |
812 | ||
813 | case NAND_CMD_RESET: | |
814 | if (this->dev_ready) | |
815 | break; | |
816 | udelay(this->chip_delay); | |
817 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
818 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
819 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
820 | while ( !(this->read_byte(mtd) & 0x40)); | |
821 | return; | |
822 | ||
823 | /* This applies to read commands */ | |
824 | default: | |
61b03bd7 | 825 | /* |
1da177e4 LT |
826 | * If we don't have access to the busy pin, we apply the given |
827 | * command delay | |
828 | */ | |
829 | if (!this->dev_ready) { | |
830 | udelay (this->chip_delay); | |
831 | return; | |
832 | } | |
833 | } | |
834 | ||
835 | /* Apply this short delay always to ensure that we do wait tWB in | |
836 | * any case on any machine. */ | |
837 | ndelay (100); | |
838 | /* wait until command is processed */ | |
839 | while (!this->dev_ready(mtd)); | |
840 | } | |
841 | ||
842 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
843 | { | |
844 | struct nand_chip *this = mtd->priv; | |
845 | struct doc_priv *doc = this->priv; | |
846 | void __iomem *docptr = doc->virtadr; | |
847 | ||
848 | if (DoC_is_MillenniumPlus(doc)) { | |
849 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
850 | DoC_Delay(doc, 4); | |
851 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
852 | if(debug) | |
853 | printk("not ready\n"); | |
854 | return 0; | |
855 | } | |
856 | if (debug)printk("was ready\n"); | |
857 | return 1; | |
858 | } else { | |
859 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
860 | DoC_Delay(doc, 4); | |
861 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
862 | if(debug) | |
863 | printk("not ready\n"); | |
864 | return 0; | |
865 | } | |
866 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
867 | DoC_Delay(doc, 2); | |
868 | if (debug)printk("was ready\n"); | |
869 | return 1; | |
870 | } | |
871 | } | |
872 | ||
873 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
874 | { | |
875 | /* This is our last resort if we couldn't find or create a BBT. Just | |
876 | pretend all blocks are good. */ | |
877 | return 0; | |
878 | } | |
879 | ||
880 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
881 | { | |
882 | struct nand_chip *this = mtd->priv; | |
883 | struct doc_priv *doc = this->priv; | |
884 | void __iomem *docptr = doc->virtadr; | |
885 | ||
886 | /* Prime the ECC engine */ | |
887 | switch(mode) { | |
888 | case NAND_ECC_READ: | |
889 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
890 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
891 | break; | |
892 | case NAND_ECC_WRITE: | |
893 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
894 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
895 | break; | |
896 | } | |
897 | } | |
898 | ||
899 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
900 | { | |
901 | struct nand_chip *this = mtd->priv; | |
902 | struct doc_priv *doc = this->priv; | |
903 | void __iomem *docptr = doc->virtadr; | |
904 | ||
905 | /* Prime the ECC engine */ | |
906 | switch(mode) { | |
907 | case NAND_ECC_READ: | |
908 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
909 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
910 | break; | |
911 | case NAND_ECC_WRITE: | |
912 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
913 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
914 | break; | |
915 | } | |
916 | } | |
917 | ||
918 | /* This code is only called on write */ | |
919 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, | |
920 | unsigned char *ecc_code) | |
921 | { | |
922 | struct nand_chip *this = mtd->priv; | |
923 | struct doc_priv *doc = this->priv; | |
924 | void __iomem *docptr = doc->virtadr; | |
925 | int i; | |
926 | int emptymatch = 1; | |
927 | ||
928 | /* flush the pipeline */ | |
929 | if (DoC_is_2000(doc)) { | |
930 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
931 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
932 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
933 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
934 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
935 | } else if (DoC_is_MillenniumPlus(doc)) { | |
936 | WriteDOC(0, docptr, Mplus_NOP); | |
937 | WriteDOC(0, docptr, Mplus_NOP); | |
938 | WriteDOC(0, docptr, Mplus_NOP); | |
939 | } else { | |
940 | WriteDOC(0, docptr, NOP); | |
941 | WriteDOC(0, docptr, NOP); | |
942 | WriteDOC(0, docptr, NOP); | |
943 | } | |
944 | ||
945 | for (i = 0; i < 6; i++) { | |
946 | if (DoC_is_MillenniumPlus(doc)) | |
947 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 948 | else |
1da177e4 LT |
949 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
950 | if (ecc_code[i] != empty_write_ecc[i]) | |
951 | emptymatch = 0; | |
952 | } | |
953 | if (DoC_is_MillenniumPlus(doc)) | |
954 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
955 | else | |
956 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
957 | #if 0 | |
958 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
959 | if (emptymatch) { | |
960 | /* Note: this somewhat expensive test should not be triggered | |
961 | often. It could be optimized away by examining the data in | |
962 | the writebuf routine, and remembering the result. */ | |
963 | for (i = 0; i < 512; i++) { | |
964 | if (dat[i] == 0xff) continue; | |
965 | emptymatch = 0; | |
966 | break; | |
967 | } | |
968 | } | |
969 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
970 | Return all-0xff ecc value instead of the computed one, so | |
971 | it'll look just like a freshly-erased page. */ | |
972 | if (emptymatch) memset(ecc_code, 0xff, 6); | |
973 | #endif | |
974 | return 0; | |
975 | } | |
976 | ||
977 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc) | |
978 | { | |
979 | int i, ret = 0; | |
980 | struct nand_chip *this = mtd->priv; | |
981 | struct doc_priv *doc = this->priv; | |
982 | void __iomem *docptr = doc->virtadr; | |
983 | volatile u_char dummy; | |
984 | int emptymatch = 1; | |
61b03bd7 | 985 | |
1da177e4 LT |
986 | /* flush the pipeline */ |
987 | if (DoC_is_2000(doc)) { | |
988 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
989 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
990 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
991 | } else if (DoC_is_MillenniumPlus(doc)) { | |
992 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
993 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
994 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
995 | } else { | |
996 | dummy = ReadDOC(docptr, ECCConf); | |
997 | dummy = ReadDOC(docptr, ECCConf); | |
998 | dummy = ReadDOC(docptr, ECCConf); | |
999 | } | |
61b03bd7 | 1000 | |
1da177e4 LT |
1001 | /* Error occured ? */ |
1002 | if (dummy & 0x80) { | |
1003 | for (i = 0; i < 6; i++) { | |
1004 | if (DoC_is_MillenniumPlus(doc)) | |
1005 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
1006 | else | |
1007 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
1008 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
1009 | emptymatch = 0; | |
1010 | } | |
1011 | /* If emptymatch=1, the read syndrome is consistent with an | |
1012 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1013 | if (emptymatch) { | |
1014 | for (i = 0; i < 6; i++) { | |
1015 | if (read_ecc[i] == 0xff) continue; | |
1016 | emptymatch = 0; | |
1017 | break; | |
1018 | } | |
1019 | } | |
1020 | /* If emptymatch still =1, check the data block. */ | |
1021 | if (emptymatch) { | |
1022 | /* Note: this somewhat expensive test should not be triggered | |
1023 | often. It could be optimized away by examining the data in | |
1024 | the readbuf routine, and remembering the result. */ | |
1025 | for (i = 0; i < 512; i++) { | |
1026 | if (dat[i] == 0xff) continue; | |
1027 | emptymatch = 0; | |
1028 | break; | |
1029 | } | |
1030 | } | |
1031 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1032 | erased block, in which case the ECC will not come out right. | |
1033 | We'll suppress the error and tell the caller everything's | |
1034 | OK. Because it is. */ | |
1035 | if (!emptymatch) ret = doc_ecc_decode (rs_decoder, dat, calc_ecc); | |
1036 | if (ret > 0) | |
1037 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 1038 | } |
1da177e4 LT |
1039 | if (DoC_is_MillenniumPlus(doc)) |
1040 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1041 | else | |
1042 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1043 | if (no_ecc_failures && (ret == -1)) { | |
1044 | printk(KERN_ERR "suppressing ECC failure\n"); | |
1045 | ret = 0; | |
1046 | } | |
1047 | return ret; | |
1048 | } | |
61b03bd7 | 1049 | |
1da177e4 LT |
1050 | //u_char mydatabuf[528]; |
1051 | ||
abc37e67 DB |
1052 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
1053 | * attempt to retain compatibility. It used to read: | |
1054 | * .oobfree = { {8, 8} } | |
1055 | * Since that leaves two bytes unusable, it was changed. But the following | |
1056 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1057 | * .oobfree = { {6, 10} } | |
1058 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1059 | * safer. The only problem with it is that any code that parses oobfree must | |
1060 | * be able to handle out-of-order segments. | |
1061 | */ | |
1da177e4 LT |
1062 | static struct nand_oobinfo doc200x_oobinfo = { |
1063 | .useecc = MTD_NANDECC_AUTOPLACE, | |
1064 | .eccbytes = 6, | |
1065 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
dff59421 | 1066 | .oobfree = { {8, 8}, {6, 2} } |
1da177e4 | 1067 | }; |
61b03bd7 | 1068 | |
1da177e4 LT |
1069 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
1070 | On sucessful return, buf will contain a copy of the media header for | |
1071 | further processing. id is the string to scan for, and will presumably be | |
1072 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1073 | header. The page #s of the found media headers are placed in mh0_page and | |
1074 | mh1_page in the DOC private structure. */ | |
1075 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, | |
1076 | const char *id, int findmirror) | |
1077 | { | |
1078 | struct nand_chip *this = mtd->priv; | |
1079 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1080 | unsigned offs; |
1da177e4 LT |
1081 | int ret; |
1082 | size_t retlen; | |
1083 | ||
1a78ff6b | 1084 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
1da177e4 LT |
1085 | ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf); |
1086 | if (retlen != mtd->oobblock) continue; | |
1087 | if (ret) { | |
1088 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", | |
1089 | offs); | |
1090 | } | |
1091 | if (memcmp(buf, id, 6)) continue; | |
1092 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); | |
1093 | if (doc->mh0_page == -1) { | |
1094 | doc->mh0_page = offs >> this->page_shift; | |
1095 | if (!findmirror) return 1; | |
1096 | continue; | |
1097 | } | |
1098 | doc->mh1_page = offs >> this->page_shift; | |
1099 | return 2; | |
1100 | } | |
1101 | if (doc->mh0_page == -1) { | |
1102 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1103 | return 0; | |
1104 | } | |
1105 | /* Only one mediaheader was found. We want buf to contain a | |
1106 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1107 | offs = doc->mh0_page << this->page_shift; | |
1108 | ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf); | |
1109 | if (retlen != mtd->oobblock) { | |
1110 | /* Insanity. Give up. */ | |
1111 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1112 | return 0; | |
1113 | } | |
1114 | return 1; | |
1115 | } | |
1116 | ||
1117 | static inline int __init nftl_partscan(struct mtd_info *mtd, | |
1118 | struct mtd_partition *parts) | |
1119 | { | |
1120 | struct nand_chip *this = mtd->priv; | |
1121 | struct doc_priv *doc = this->priv; | |
1122 | int ret = 0; | |
1123 | u_char *buf; | |
1124 | struct NFTLMediaHeader *mh; | |
1125 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1126 | int numparts = 0; |
1da177e4 LT |
1127 | unsigned blocks, maxblocks; |
1128 | int offs, numheaders; | |
1129 | ||
1130 | buf = kmalloc(mtd->oobblock, GFP_KERNEL); | |
1131 | if (!buf) { | |
1132 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1133 | return 0; | |
1134 | } | |
1135 | if (!(numheaders=find_media_headers(mtd, buf, "ANAND", 1))) goto out; | |
1136 | mh = (struct NFTLMediaHeader *) buf; | |
1137 | ||
f29a4b86 TG |
1138 | mh->NumEraseUnits = le16_to_cpu(mh->NumEraseUnits); |
1139 | mh->FirstPhysicalEUN = le16_to_cpu(mh->FirstPhysicalEUN); | |
1140 | mh->FormattedSize = le32_to_cpu(mh->FormattedSize); | |
1141 | ||
1da177e4 LT |
1142 | printk(KERN_INFO " DataOrgID = %s\n" |
1143 | " NumEraseUnits = %d\n" | |
1144 | " FirstPhysicalEUN = %d\n" | |
1145 | " FormattedSize = %d\n" | |
1146 | " UnitSizeFactor = %d\n", | |
1147 | mh->DataOrgID, mh->NumEraseUnits, | |
1148 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1149 | mh->UnitSizeFactor); | |
1da177e4 LT |
1150 | |
1151 | blocks = mtd->size >> this->phys_erase_shift; | |
1152 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1153 | ||
1154 | if (mh->UnitSizeFactor == 0x00) { | |
1155 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1156 | - There can be at most 32768 virtual blocks. | |
1157 | - There can be at most (virtual block size - page size) | |
1158 | virtual blocks (because MediaHeader+BBT must fit in 1). | |
1159 | */ | |
1160 | mh->UnitSizeFactor = 0xff; | |
1161 | while (blocks > maxblocks) { | |
1162 | blocks >>= 1; | |
1163 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1164 | mh->UnitSizeFactor--; | |
1165 | } | |
1166 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1167 | } | |
1168 | ||
1169 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1170 | layers; variables with have already been configured by nand_scan. | |
1171 | Unfortunately, we didn't know before this point what these values | |
1172 | should be. Thus, this code is somewhat dependant on the exact | |
1173 | implementation of the NAND layer. */ | |
1174 | if (mh->UnitSizeFactor != 0xff) { | |
1175 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1176 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1177 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1178 | blocks = mtd->size >> this->bbt_erase_shift; | |
1179 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1180 | } | |
1181 | ||
1182 | if (blocks > maxblocks) { | |
1183 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1184 | goto out; | |
1185 | } | |
1186 | ||
1187 | /* Skip past the media headers. */ | |
1188 | offs = max(doc->mh0_page, doc->mh1_page); | |
1189 | offs <<= this->page_shift; | |
1190 | offs += mtd->erasesize; | |
1191 | ||
1a78ff6b DB |
1192 | if (show_firmware_partition == 1) { |
1193 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1194 | parts[0].offset = 0; | |
1195 | parts[0].size = offs; | |
1196 | numparts = 1; | |
1197 | } | |
1198 | ||
1199 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1200 | parts[numparts].offset = offs; | |
1201 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1202 | ||
1203 | offs += parts[numparts].size; | |
1204 | numparts++; | |
1da177e4 | 1205 | |
1da177e4 | 1206 | if (offs < mtd->size) { |
1a78ff6b DB |
1207 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1208 | parts[numparts].offset = offs; | |
1209 | parts[numparts].size = mtd->size - offs; | |
1210 | numparts++; | |
1da177e4 | 1211 | } |
1a78ff6b DB |
1212 | |
1213 | ret = numparts; | |
1da177e4 LT |
1214 | out: |
1215 | kfree(buf); | |
1216 | return ret; | |
1217 | } | |
1218 | ||
1219 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
1220 | static inline int __init inftl_partscan(struct mtd_info *mtd, | |
1221 | struct mtd_partition *parts) | |
1222 | { | |
1223 | struct nand_chip *this = mtd->priv; | |
1224 | struct doc_priv *doc = this->priv; | |
1225 | int ret = 0; | |
1226 | u_char *buf; | |
1227 | struct INFTLMediaHeader *mh; | |
1228 | struct INFTLPartition *ip; | |
1229 | int numparts = 0; | |
1230 | int blocks; | |
1231 | int vshift, lastvunit = 0; | |
1232 | int i; | |
1233 | int end = mtd->size; | |
1234 | ||
1235 | if (inftl_bbt_write) | |
1236 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1237 | ||
1238 | buf = kmalloc(mtd->oobblock, GFP_KERNEL); | |
1239 | if (!buf) { | |
1240 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | if (!find_media_headers(mtd, buf, "BNAND", 0)) goto out; | |
1245 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); | |
1246 | mh = (struct INFTLMediaHeader *) buf; | |
1247 | ||
1248 | mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks); | |
1249 | mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions); | |
1250 | mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions); | |
1251 | mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits); | |
1252 | mh->FormatFlags = le32_to_cpu(mh->FormatFlags); | |
1253 | mh->PercentUsed = le32_to_cpu(mh->PercentUsed); | |
61b03bd7 | 1254 | |
1da177e4 LT |
1255 | printk(KERN_INFO " bootRecordID = %s\n" |
1256 | " NoOfBootImageBlocks = %d\n" | |
1257 | " NoOfBinaryPartitions = %d\n" | |
1258 | " NoOfBDTLPartitions = %d\n" | |
1259 | " BlockMultiplerBits = %d\n" | |
1260 | " FormatFlgs = %d\n" | |
1261 | " OsakVersion = %d.%d.%d.%d\n" | |
1262 | " PercentUsed = %d\n", | |
1263 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1264 | mh->NoOfBinaryPartitions, | |
1265 | mh->NoOfBDTLPartitions, | |
1266 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1267 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1268 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1269 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1270 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1271 | mh->PercentUsed); | |
1da177e4 LT |
1272 | |
1273 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1274 | ||
1275 | blocks = mtd->size >> vshift; | |
1276 | if (blocks > 32768) { | |
1277 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1278 | goto out; | |
1279 | } | |
1280 | ||
1281 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1282 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1283 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1284 | goto out; | |
1285 | } | |
1286 | ||
1287 | /* Scan the partitions */ | |
1288 | for (i = 0; (i < 4); i++) { | |
1289 | ip = &(mh->Partitions[i]); | |
1290 | ip->virtualUnits = le32_to_cpu(ip->virtualUnits); | |
1291 | ip->firstUnit = le32_to_cpu(ip->firstUnit); | |
1292 | ip->lastUnit = le32_to_cpu(ip->lastUnit); | |
1293 | ip->flags = le32_to_cpu(ip->flags); | |
1294 | ip->spareUnits = le32_to_cpu(ip->spareUnits); | |
1295 | ip->Reserved0 = le32_to_cpu(ip->Reserved0); | |
1296 | ||
1da177e4 LT |
1297 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1298 | " virtualUnits = %d\n" | |
1299 | " firstUnit = %d\n" | |
1300 | " lastUnit = %d\n" | |
1301 | " flags = 0x%x\n" | |
1302 | " spareUnits = %d\n", | |
1303 | i, ip->virtualUnits, ip->firstUnit, | |
1304 | ip->lastUnit, ip->flags, | |
1305 | ip->spareUnits); | |
1da177e4 | 1306 | |
1a78ff6b DB |
1307 | if ((show_firmware_partition == 1) && |
1308 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1309 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1310 | parts[0].offset = 0; | |
1311 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1312 | numparts = 1; | |
1313 | } | |
1da177e4 LT |
1314 | |
1315 | if (ip->flags & INFTL_BINARY) | |
1316 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1317 | else | |
1318 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1319 | parts[numparts].offset = ip->firstUnit << vshift; | |
1320 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1321 | numparts++; | |
1322 | if (ip->lastUnit > lastvunit) lastvunit = ip->lastUnit; | |
1323 | if (ip->flags & INFTL_LAST) break; | |
1324 | } | |
1325 | lastvunit++; | |
1326 | if ((lastvunit << vshift) < end) { | |
1327 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1328 | parts[numparts].offset = lastvunit << vshift; | |
1329 | parts[numparts].size = end - parts[numparts].offset; | |
1330 | numparts++; | |
1331 | } | |
1332 | ret = numparts; | |
1333 | out: | |
1334 | kfree(buf); | |
1335 | return ret; | |
1336 | } | |
1337 | ||
1338 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1339 | { | |
1340 | int ret, numparts; | |
1341 | struct nand_chip *this = mtd->priv; | |
1342 | struct doc_priv *doc = this->priv; | |
1343 | struct mtd_partition parts[2]; | |
1344 | ||
1345 | memset((char *) parts, 0, sizeof(parts)); | |
1346 | /* On NFTL, we have to find the media headers before we can read the | |
1347 | BBTs, since they're stored in the media header eraseblocks. */ | |
1348 | numparts = nftl_partscan(mtd, parts); | |
1349 | if (!numparts) return -EIO; | |
1350 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1351 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1352 | NAND_BBT_VERSION; | |
1353 | this->bbt_td->veroffs = 7; | |
1354 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1355 | if (doc->mh1_page != -1) { | |
1356 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1357 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1358 | NAND_BBT_VERSION; | |
1359 | this->bbt_md->veroffs = 7; | |
1360 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1361 | } else { | |
1362 | this->bbt_md = NULL; | |
1363 | } | |
1364 | ||
1365 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1366 | At least as nand_bbt.c is currently written. */ | |
1367 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1368 | return ret; | |
1369 | add_mtd_device(mtd); | |
1370 | #ifdef CONFIG_MTD_PARTITIONS | |
1371 | if (!no_autopart) | |
1372 | add_mtd_partitions(mtd, parts, numparts); | |
1373 | #endif | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1378 | { | |
1379 | int ret, numparts; | |
1380 | struct nand_chip *this = mtd->priv; | |
1381 | struct doc_priv *doc = this->priv; | |
1382 | struct mtd_partition parts[5]; | |
1383 | ||
1384 | if (this->numchips > doc->chips_per_floor) { | |
1385 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1386 | return -EIO; | |
1387 | } | |
1388 | ||
1389 | if (DoC_is_MillenniumPlus(doc)) { | |
1390 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1391 | if (inftl_bbt_write) | |
1392 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1393 | this->bbt_td->pages[0] = 2; | |
1394 | this->bbt_md = NULL; | |
1395 | } else { | |
1396 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | | |
1397 | NAND_BBT_VERSION; | |
1398 | if (inftl_bbt_write) | |
1399 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1400 | this->bbt_td->offs = 8; | |
1401 | this->bbt_td->len = 8; | |
1402 | this->bbt_td->veroffs = 7; | |
1403 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1404 | this->bbt_td->reserved_block_code = 0x01; | |
1405 | this->bbt_td->pattern = "MSYS_BBT"; | |
1406 | ||
1407 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | | |
1408 | NAND_BBT_VERSION; | |
1409 | if (inftl_bbt_write) | |
1410 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1411 | this->bbt_md->offs = 8; | |
1412 | this->bbt_md->len = 8; | |
1413 | this->bbt_md->veroffs = 7; | |
1414 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1415 | this->bbt_md->reserved_block_code = 0x01; | |
1416 | this->bbt_md->pattern = "TBB_SYSM"; | |
1417 | } | |
1418 | ||
1419 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1420 | At least as nand_bbt.c is currently written. */ | |
1421 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1422 | return ret; | |
1423 | memset((char *) parts, 0, sizeof(parts)); | |
1424 | numparts = inftl_partscan(mtd, parts); | |
1425 | /* At least for now, require the INFTL Media Header. We could probably | |
1426 | do without it for non-INFTL use, since all it gives us is | |
1427 | autopartitioning, but I want to give it more thought. */ | |
1428 | if (!numparts) return -EIO; | |
1429 | add_mtd_device(mtd); | |
1430 | #ifdef CONFIG_MTD_PARTITIONS | |
1431 | if (!no_autopart) | |
1432 | add_mtd_partitions(mtd, parts, numparts); | |
1433 | #endif | |
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1438 | { | |
1439 | struct nand_chip *this = mtd->priv; | |
1440 | struct doc_priv *doc = this->priv; | |
1441 | ||
1442 | this->write_byte = doc2000_write_byte; | |
1443 | this->read_byte = doc2000_read_byte; | |
1444 | this->write_buf = doc2000_writebuf; | |
1445 | this->read_buf = doc2000_readbuf; | |
1446 | this->verify_buf = doc2000_verifybuf; | |
1447 | this->scan_bbt = nftl_scan_bbt; | |
1448 | ||
1449 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1450 | doc2000_count_chips(mtd); | |
1451 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1452 | return (4 * doc->chips_per_floor); | |
1453 | } | |
1454 | ||
1455 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1456 | { | |
1457 | struct nand_chip *this = mtd->priv; | |
1458 | struct doc_priv *doc = this->priv; | |
1459 | ||
1460 | this->write_byte = doc2001_write_byte; | |
1461 | this->read_byte = doc2001_read_byte; | |
1462 | this->write_buf = doc2001_writebuf; | |
1463 | this->read_buf = doc2001_readbuf; | |
1464 | this->verify_buf = doc2001_verifybuf; | |
1465 | ||
1466 | ReadDOC(doc->virtadr, ChipID); | |
1467 | ReadDOC(doc->virtadr, ChipID); | |
1468 | ReadDOC(doc->virtadr, ChipID); | |
1469 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1470 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1471 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1472 | Treat it like a Millennium, except that it |
1473 | can have multiple chips. */ | |
1474 | doc2000_count_chips(mtd); | |
1475 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1476 | this->scan_bbt = inftl_scan_bbt; | |
1477 | return (4 * doc->chips_per_floor); | |
1478 | } else { | |
1479 | /* Bog-standard Millennium */ | |
1480 | doc->chips_per_floor = 1; | |
1481 | mtd->name = "DiskOnChip Millennium"; | |
1482 | this->scan_bbt = nftl_scan_bbt; | |
1483 | return 1; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1488 | { | |
1489 | struct nand_chip *this = mtd->priv; | |
1490 | struct doc_priv *doc = this->priv; | |
1491 | ||
1492 | this->write_byte = NULL; | |
1493 | this->read_byte = doc2001plus_read_byte; | |
1494 | this->write_buf = doc2001plus_writebuf; | |
1495 | this->read_buf = doc2001plus_readbuf; | |
1496 | this->verify_buf = doc2001plus_verifybuf; | |
1497 | this->scan_bbt = inftl_scan_bbt; | |
1498 | this->hwcontrol = NULL; | |
1499 | this->select_chip = doc2001plus_select_chip; | |
1500 | this->cmdfunc = doc2001plus_command; | |
1501 | this->enable_hwecc = doc2001plus_enable_hwecc; | |
1502 | ||
1503 | doc->chips_per_floor = 1; | |
1504 | mtd->name = "DiskOnChip Millennium Plus"; | |
1505 | ||
1506 | return 1; | |
1507 | } | |
1508 | ||
858119e1 | 1509 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1510 | { |
1511 | unsigned char ChipID; | |
1512 | struct mtd_info *mtd; | |
1513 | struct nand_chip *nand; | |
1514 | struct doc_priv *doc; | |
1515 | void __iomem *virtadr; | |
1516 | unsigned char save_control; | |
1517 | unsigned char tmp, tmpb, tmpc; | |
1518 | int reg, len, numchips; | |
1519 | int ret = 0; | |
1520 | ||
1521 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1522 | if (!virtadr) { | |
1523 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1524 | return -EIO; | |
1525 | } | |
1526 | ||
1527 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1528 | * bootup procedure will put the device into reset mode, and | |
1529 | * it's not possible to talk to it without actually writing | |
1530 | * to the DOCControl register. So we store the current contents | |
1531 | * of the DOCControl register's location, in case we later decide | |
1532 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1533 | * found it. |
1da177e4 LT |
1534 | */ |
1535 | save_control = ReadDOC(virtadr, DOCControl); | |
1536 | ||
1537 | /* Reset the DiskOnChip ASIC */ | |
61b03bd7 | 1538 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, |
1da177e4 | 1539 | virtadr, DOCControl); |
61b03bd7 | 1540 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, |
1da177e4 LT |
1541 | virtadr, DOCControl); |
1542 | ||
1543 | /* Enable the DiskOnChip ASIC */ | |
61b03bd7 | 1544 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, |
1da177e4 | 1545 | virtadr, DOCControl); |
61b03bd7 | 1546 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, |
1da177e4 LT |
1547 | virtadr, DOCControl); |
1548 | ||
1549 | ChipID = ReadDOC(virtadr, ChipID); | |
1550 | ||
1551 | switch(ChipID) { | |
1552 | case DOC_ChipID_Doc2k: | |
1553 | reg = DoC_2k_ECCStatus; | |
1554 | break; | |
1555 | case DOC_ChipID_DocMil: | |
1556 | reg = DoC_ECCConf; | |
1557 | break; | |
1558 | case DOC_ChipID_DocMilPlus16: | |
1559 | case DOC_ChipID_DocMilPlus32: | |
1560 | case 0: | |
1561 | /* Possible Millennium Plus, need to do more checks */ | |
1562 | /* Possibly release from power down mode */ | |
1563 | for (tmp = 0; (tmp < 4); tmp++) | |
1564 | ReadDOC(virtadr, Mplus_Power); | |
1565 | ||
1566 | /* Reset the Millennium Plus ASIC */ | |
1567 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | | |
1568 | DOC_MODE_BDECT; | |
1569 | WriteDOC(tmp, virtadr, Mplus_DOCControl); | |
1570 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1571 | ||
1572 | mdelay(1); | |
1573 | /* Enable the Millennium Plus ASIC */ | |
1574 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | | |
1575 | DOC_MODE_BDECT; | |
1576 | WriteDOC(tmp, virtadr, Mplus_DOCControl); | |
1577 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1578 | mdelay(1); | |
1579 | ||
1580 | ChipID = ReadDOC(virtadr, ChipID); | |
1581 | ||
1582 | switch (ChipID) { | |
1583 | case DOC_ChipID_DocMilPlus16: | |
1584 | reg = DoC_Mplus_Toggle; | |
1585 | break; | |
1586 | case DOC_ChipID_DocMilPlus32: | |
1587 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1588 | default: | |
1589 | ret = -ENODEV; | |
1590 | goto notfound; | |
1591 | } | |
1592 | break; | |
1593 | ||
1594 | default: | |
1595 | ret = -ENODEV; | |
1596 | goto notfound; | |
1597 | } | |
1598 | /* Check the TOGGLE bit in the ECC register */ | |
1599 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1600 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1601 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1602 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1603 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1604 | ret = -ENODEV; | |
1605 | goto notfound; | |
1606 | } | |
1607 | ||
1608 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1609 | unsigned char oldval; | |
1610 | unsigned char newval; | |
1611 | nand = mtd->priv; | |
1612 | doc = nand->priv; | |
1613 | /* Use the alias resolution register to determine if this is | |
1614 | in fact the same DOC aliased to a new address. If writes | |
1615 | to one chip's alias resolution register change the value on | |
1616 | the other chip, they're the same chip. */ | |
1617 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1618 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1619 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1620 | } else { | |
1621 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1622 | newval = ReadDOC(virtadr, AliasResolution); | |
1623 | } | |
1624 | if (oldval != newval) | |
1625 | continue; | |
1626 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1627 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1628 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1629 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it | |
1630 | } else { | |
1631 | WriteDOC(~newval, virtadr, AliasResolution); | |
1632 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1633 | WriteDOC(newval, virtadr, AliasResolution); // restore it | |
1634 | } | |
1635 | newval = ~newval; | |
1636 | if (oldval == newval) { | |
1637 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1638 | goto notfound; | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1643 | ||
1644 | len = sizeof(struct mtd_info) + | |
1645 | sizeof(struct nand_chip) + | |
1646 | sizeof(struct doc_priv) + | |
1647 | (2 * sizeof(struct nand_bbt_descr)); | |
1648 | mtd = kmalloc(len, GFP_KERNEL); | |
1649 | if (!mtd) { | |
1650 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1651 | ret = -ENOMEM; | |
1652 | goto fail; | |
1653 | } | |
1654 | memset(mtd, 0, len); | |
1655 | ||
1656 | nand = (struct nand_chip *) (mtd + 1); | |
1657 | doc = (struct doc_priv *) (nand + 1); | |
1658 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1659 | nand->bbt_md = nand->bbt_td + 1; | |
1660 | ||
1661 | mtd->priv = nand; | |
1662 | mtd->owner = THIS_MODULE; | |
1663 | ||
1664 | nand->priv = doc; | |
1665 | nand->select_chip = doc200x_select_chip; | |
1666 | nand->hwcontrol = doc200x_hwcontrol; | |
1667 | nand->dev_ready = doc200x_dev_ready; | |
1668 | nand->waitfunc = doc200x_wait; | |
1669 | nand->block_bad = doc200x_block_bad; | |
1670 | nand->enable_hwecc = doc200x_enable_hwecc; | |
1671 | nand->calculate_ecc = doc200x_calculate_ecc; | |
1672 | nand->correct_data = doc200x_correct_data; | |
1673 | ||
1674 | nand->autooob = &doc200x_oobinfo; | |
1675 | nand->eccmode = NAND_ECC_HW6_512; | |
1676 | nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME; | |
1677 | ||
1678 | doc->physadr = physadr; | |
1679 | doc->virtadr = virtadr; | |
1680 | doc->ChipID = ChipID; | |
1681 | doc->curfloor = -1; | |
1682 | doc->curchip = -1; | |
1683 | doc->mh0_page = -1; | |
1684 | doc->mh1_page = -1; | |
1685 | doc->nextdoc = doclist; | |
1686 | ||
1687 | if (ChipID == DOC_ChipID_Doc2k) | |
1688 | numchips = doc2000_init(mtd); | |
1689 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1690 | numchips = doc2001plus_init(mtd); | |
1691 | else | |
1692 | numchips = doc2001_init(mtd); | |
1693 | ||
1694 | if ((ret = nand_scan(mtd, numchips))) { | |
1695 | /* DBB note: i believe nand_release is necessary here, as | |
1696 | buffers may have been allocated in nand_base. Check with | |
1697 | Thomas. FIX ME! */ | |
1698 | /* nand_release will call del_mtd_device, but we haven't yet | |
1699 | added it. This is handled without incident by | |
1700 | del_mtd_device, as far as I can tell. */ | |
1701 | nand_release(mtd); | |
1702 | kfree(mtd); | |
1703 | goto fail; | |
1704 | } | |
1705 | ||
1706 | /* Success! */ | |
1707 | doclist = mtd; | |
1708 | return 0; | |
1709 | ||
1710 | notfound: | |
1711 | /* Put back the contents of the DOCControl register, in case it's not | |
1712 | actually a DiskOnChip. */ | |
1713 | WriteDOC(save_control, virtadr, DOCControl); | |
1714 | fail: | |
1715 | iounmap(virtadr); | |
1716 | return ret; | |
1717 | } | |
1718 | ||
1719 | static void release_nanddoc(void) | |
1720 | { | |
1721 | struct mtd_info *mtd, *nextmtd; | |
1722 | struct nand_chip *nand; | |
1723 | struct doc_priv *doc; | |
1724 | ||
1725 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1726 | nand = mtd->priv; | |
1727 | doc = nand->priv; | |
1728 | ||
1729 | nextmtd = doc->nextdoc; | |
1730 | nand_release(mtd); | |
1731 | iounmap(doc->virtadr); | |
1732 | kfree(mtd); | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | static int __init init_nanddoc(void) | |
1737 | { | |
1738 | int i, ret = 0; | |
1739 | ||
1740 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1741 | * This way we have it handy, if an error happens |
1da177e4 LT |
1742 | * |
1743 | * Symbolsize is 10 (bits) | |
1744 | * Primitve polynomial is x^10+x^3+1 | |
1745 | * first consecutive root is 510 | |
1746 | * primitve element to generate roots = 1 | |
1747 | * generator polinomial degree = 4 | |
1748 | */ | |
1749 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
1750 | if (!rs_decoder) { | |
1751 | printk (KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1752 | return -ENOMEM; | |
1753 | } | |
1754 | ||
1755 | if (doc_config_location) { | |
1756 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1757 | ret = doc_probe(doc_config_location); | |
1758 | if (ret < 0) | |
1759 | goto outerr; | |
1760 | } else { | |
1761 | for (i=0; (doc_locations[i] != 0xffffffff); i++) { | |
1762 | doc_probe(doc_locations[i]); | |
1763 | } | |
1764 | } | |
1765 | /* No banner message any more. Print a message if no DiskOnChip | |
1766 | found, so the user knows we at least tried. */ | |
1767 | if (!doclist) { | |
1768 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1769 | ret = -ENODEV; | |
1770 | goto outerr; | |
1771 | } | |
1772 | return 0; | |
1773 | outerr: | |
1774 | free_rs(rs_decoder); | |
1775 | return ret; | |
1776 | } | |
1777 | ||
1778 | static void __exit cleanup_nanddoc(void) | |
1779 | { | |
1780 | /* Cleanup the nand/DoC resources */ | |
1781 | release_nanddoc(); | |
1782 | ||
1783 | /* Free the reed solomon resources */ | |
1784 | if (rs_decoder) { | |
1785 | free_rs(rs_decoder); | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | module_init(init_nanddoc); | |
1790 | module_exit(cleanup_nanddoc); | |
1791 | ||
1792 | MODULE_LICENSE("GPL"); | |
1793 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1794 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); |