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Commit | Line | Data |
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ac7eb8a3 | 1 | /* |
932394ac WD |
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> | |
ac7eb8a3 | 11 | * |
932394ac | 12 | * Error correction code lifted from the old docecc code |
ac7eb8a3 | 13 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) |
932394ac WD |
14 | * Copyright (C) 2000 Netgem S.A. |
15 | * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de> | |
ac7eb8a3 | 16 | * |
932394ac WD |
17 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
18 | * | |
cfa460ad | 19 | * $Id: diskonchip.c,v 1.55 2005/11/07 11:14:30 gleixner Exp $ |
932394ac WD |
20 | */ |
21 | ||
038ccac5 | 22 | #include <common.h> |
addb2e16 | 23 | |
6db39708 | 24 | #if !defined(CFG_NAND_LEGACY) |
addb2e16 | 25 | |
932394ac WD |
26 | #include <linux/kernel.h> |
27 | #include <linux/init.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/rslib.h> | |
31 | #include <linux/moduleparam.h> | |
32 | #include <asm/io.h> | |
33 | ||
34 | #include <linux/mtd/mtd.h> | |
35 | #include <linux/mtd/nand.h> | |
36 | #include <linux/mtd/doc2000.h> | |
37 | #include <linux/mtd/compatmac.h> | |
38 | #include <linux/mtd/partitions.h> | |
39 | #include <linux/mtd/inftl.h> | |
40 | ||
41 | /* Where to look for the devices? */ | |
cfa460ad WJ |
42 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
43 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
932394ac WD |
44 | #endif |
45 | ||
46 | static unsigned long __initdata doc_locations[] = { | |
47 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) | |
cfa460ad | 48 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
ac7eb8a3 | 49 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
932394ac | 50 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
ac7eb8a3 WD |
51 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
52 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
932394ac WD |
53 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
54 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ | |
ac7eb8a3 | 55 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
932394ac | 56 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
ac7eb8a3 WD |
57 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
58 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
932394ac WD |
59 | 0xe8000, 0xea000, 0xec000, 0xee000, |
60 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ | |
61 | #elif defined(__PPC__) | |
62 | 0xe4000000, | |
63 | #elif defined(CONFIG_MOMENCO_OCELOT) | |
64 | 0x2f000000, | |
ac7eb8a3 | 65 | 0xff000000, |
932394ac | 66 | #elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C) |
ac7eb8a3 | 67 | 0xff000000, |
cfa460ad | 68 | #else |
932394ac WD |
69 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
70 | #endif | |
71 | 0xffffffff }; | |
72 | ||
73 | static struct mtd_info *doclist = NULL; | |
74 | ||
75 | struct doc_priv { | |
76 | void __iomem *virtadr; | |
77 | unsigned long physadr; | |
78 | u_char ChipID; | |
79 | u_char CDSNControl; | |
cfa460ad | 80 | int chips_per_floor; /* The number of chips detected on each floor */ |
932394ac WD |
81 | int curfloor; |
82 | int curchip; | |
83 | int mh0_page; | |
84 | int mh1_page; | |
85 | struct mtd_info *nextdoc; | |
86 | }; | |
87 | ||
932394ac WD |
88 | /* This is the syndrome computed by the HW ecc generator upon reading an empty |
89 | page, one with all 0xff for data and stored ecc code. */ | |
90 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
cfa460ad | 91 | |
932394ac WD |
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 | ||
cfa460ad WJ |
102 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
103 | unsigned int bitmask); | |
932394ac WD |
104 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
105 | ||
cfa460ad | 106 | static int debug = 0; |
932394ac WD |
107 | module_param(debug, int, 0); |
108 | ||
cfa460ad | 109 | static int try_dword = 1; |
932394ac WD |
110 | module_param(try_dword, int, 0); |
111 | ||
cfa460ad | 112 | static int no_ecc_failures = 0; |
932394ac WD |
113 | module_param(no_ecc_failures, int, 0); |
114 | ||
cfa460ad | 115 | static int no_autopart = 0; |
932394ac | 116 | module_param(no_autopart, int, 0); |
932394ac | 117 | |
cfa460ad WJ |
118 | static int show_firmware_partition = 0; |
119 | module_param(show_firmware_partition, int, 0); | |
120 | ||
121 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE | |
122 | static int inftl_bbt_write = 1; | |
932394ac | 123 | #else |
cfa460ad | 124 | static int inftl_bbt_write = 0; |
932394ac WD |
125 | #endif |
126 | module_param(inftl_bbt_write, int, 0); | |
127 | ||
cfa460ad | 128 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
932394ac WD |
129 | module_param(doc_config_location, ulong, 0); |
130 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
131 | ||
932394ac WD |
132 | /* Sector size for HW ECC */ |
133 | #define SECTOR_SIZE 512 | |
134 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
135 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
136 | /* Number of roots */ | |
137 | #define NROOTS 4 | |
138 | /* First consective root */ | |
139 | #define FCR 510 | |
140 | /* Number of symbols */ | |
141 | #define NN 1023 | |
142 | ||
143 | /* the Reed Solomon control structure */ | |
144 | static struct rs_control *rs_decoder; | |
145 | ||
ac7eb8a3 | 146 | /* |
932394ac WD |
147 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
148 | * which we must convert to a standard syndrom usable by the generic | |
149 | * Reed-Solomon library code. | |
150 | * | |
151 | * Fabrice Bellard figured this out in the old docecc code. I added | |
152 | * some comments, improved a minor bit and converted it to make use | |
153 | * of the generic Reed-Solomon libary. tglx | |
154 | */ | |
cfa460ad | 155 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
932394ac WD |
156 | { |
157 | int i, j, nerr, errpos[8]; | |
158 | uint8_t parity; | |
159 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
160 | ||
161 | /* Convert the ecc bytes into words */ | |
162 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
163 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
164 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
165 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
166 | parity = ecc[1]; | |
167 | ||
168 | /* Initialize the syndrom buffer */ | |
169 | for (i = 0; i < NROOTS; i++) | |
170 | s[i] = ds[0]; | |
ac7eb8a3 WD |
171 | /* |
172 | * Evaluate | |
932394ac WD |
173 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
174 | * where x = alpha^(FCR + i) | |
175 | */ | |
cfa460ad WJ |
176 | for (j = 1; j < NROOTS; j++) { |
177 | if (ds[j] == 0) | |
932394ac WD |
178 | continue; |
179 | tmp = rs->index_of[ds[j]]; | |
cfa460ad | 180 | for (i = 0; i < NROOTS; i++) |
932394ac WD |
181 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
182 | } | |
183 | ||
184 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
185 | for (i = 0; i < NROOTS; i++) { | |
186 | if (syn[i]) | |
53677ef1 | 187 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
932394ac WD |
188 | } |
189 | /* Call the decoder library */ | |
190 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
191 | ||
192 | /* Incorrectable errors ? */ | |
193 | if (nerr < 0) | |
194 | return nerr; | |
195 | ||
ac7eb8a3 | 196 | /* |
932394ac WD |
197 | * Correct the errors. The bitpositions are a bit of magic, |
198 | * but they are given by the design of the de/encoder circuit | |
199 | * in the DoC ASIC's. | |
200 | */ | |
cfa460ad | 201 | for (i = 0; i < nerr; i++) { |
932394ac WD |
202 | int index, bitpos, pos = 1015 - errpos[i]; |
203 | uint8_t val; | |
204 | if (pos >= NB_DATA && pos < 1019) | |
205 | continue; | |
206 | if (pos < NB_DATA) { | |
207 | /* extract bit position (MSB first) */ | |
208 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
209 | /* now correct the following 10 bits. At most two bytes | |
210 | can be modified since pos is even */ | |
211 | index = (pos >> 3) ^ 1; | |
212 | bitpos = pos & 7; | |
cfa460ad | 213 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
932394ac WD |
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; | |
cfa460ad WJ |
223 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
224 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
932394ac WD |
225 | parity ^= val; |
226 | if (index < SECTOR_SIZE) | |
227 | data[index] ^= val; | |
228 | } | |
229 | } | |
230 | } | |
231 | /* If the parity is wrong, no rescue possible */ | |
232 | return parity ? -1 : nerr; | |
233 | } | |
234 | ||
235 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
236 | { | |
237 | volatile char dummy; | |
238 | int i; | |
ac7eb8a3 | 239 | |
932394ac WD |
240 | for (i = 0; i < cycles; i++) { |
241 | if (DoC_is_Millennium(doc)) | |
242 | dummy = ReadDOC(doc->virtadr, NOP); | |
243 | else if (DoC_is_MillenniumPlus(doc)) | |
244 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
245 | else | |
246 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
247 | } | |
ac7eb8a3 | 248 | |
932394ac WD |
249 | } |
250 | ||
251 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
252 | ||
253 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
254 | static int _DoC_WaitReady(struct doc_priv *doc) | |
255 | { | |
ac7eb8a3 | 256 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
257 | unsigned long timeo = jiffies + (HZ * 10); |
258 | ||
cfa460ad WJ |
259 | if (debug) |
260 | printk("_DoC_WaitReady...\n"); | |
932394ac WD |
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 | { | |
ac7eb8a3 | 287 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
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 | ||
cfa460ad WJ |
305 | if (debug) |
306 | printk("DoC_WaitReady OK\n"); | |
932394ac WD |
307 | return ret; |
308 | } | |
309 | ||
310 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
311 | { | |
312 | struct nand_chip *this = mtd->priv; | |
313 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 314 | void __iomem *docptr = doc->virtadr; |
932394ac | 315 | |
cfa460ad WJ |
316 | if (debug) |
317 | printk("write_byte %02x\n", datum); | |
932394ac WD |
318 | WriteDOC(datum, docptr, CDSNSlowIO); |
319 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
320 | } | |
321 | ||
322 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
323 | { | |
324 | struct nand_chip *this = mtd->priv; | |
325 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 326 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
327 | u_char ret; |
328 | ||
329 | ReadDOC(docptr, CDSNSlowIO); | |
330 | DoC_Delay(doc, 2); | |
331 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
cfa460ad WJ |
332 | if (debug) |
333 | printk("read_byte returns %02x\n", ret); | |
932394ac WD |
334 | return ret; |
335 | } | |
336 | ||
cfa460ad | 337 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
338 | { |
339 | struct nand_chip *this = mtd->priv; | |
340 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 341 | void __iomem *docptr = doc->virtadr; |
932394ac | 342 | int i; |
cfa460ad WJ |
343 | if (debug) |
344 | printk("writebuf of %d bytes: ", len); | |
345 | for (i = 0; i < len; i++) { | |
932394ac WD |
346 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
347 | if (debug && i < 16) | |
348 | printk("%02x ", buf[i]); | |
349 | } | |
cfa460ad WJ |
350 | if (debug) |
351 | printk("\n"); | |
932394ac WD |
352 | } |
353 | ||
cfa460ad | 354 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
932394ac WD |
355 | { |
356 | struct nand_chip *this = mtd->priv; | |
357 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 358 | void __iomem *docptr = doc->virtadr; |
53677ef1 | 359 | int i; |
932394ac | 360 | |
cfa460ad WJ |
361 | if (debug) |
362 | printk("readbuf of %d bytes: ", len); | |
932394ac | 363 | |
cfa460ad | 364 | for (i = 0; i < len; i++) { |
932394ac WD |
365 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
366 | } | |
367 | } | |
368 | ||
ac7eb8a3 | 369 | static void doc2000_readbuf_dword(struct mtd_info *mtd, |
932394ac WD |
370 | u_char *buf, int len) |
371 | { | |
372 | struct nand_chip *this = mtd->priv; | |
373 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 374 | void __iomem *docptr = doc->virtadr; |
53677ef1 | 375 | int i; |
932394ac | 376 | |
cfa460ad WJ |
377 | if (debug) |
378 | printk("readbuf_dword of %d bytes: ", len); | |
932394ac | 379 | |
cfa460ad WJ |
380 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
381 | for (i = 0; i < len; i++) { | |
382 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
932394ac WD |
383 | } |
384 | } else { | |
cfa460ad WJ |
385 | for (i = 0; i < len; i += 4) { |
386 | *(uint32_t*) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
932394ac WD |
387 | } |
388 | } | |
389 | } | |
390 | ||
cfa460ad | 391 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
392 | { |
393 | struct nand_chip *this = mtd->priv; | |
394 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 395 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
396 | int i; |
397 | ||
cfa460ad | 398 | for (i = 0; i < len; i++) |
932394ac WD |
399 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
400 | return -EFAULT; | |
401 | return 0; | |
402 | } | |
403 | ||
404 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
405 | { | |
406 | struct nand_chip *this = mtd->priv; | |
407 | struct doc_priv *doc = this->priv; | |
408 | uint16_t ret; | |
409 | ||
410 | doc200x_select_chip(mtd, nr); | |
cfa460ad WJ |
411 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
412 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
413 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
414 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
415 | ||
416 | /* We cant' use dev_ready here, but at least we wait for the | |
417 | * command to complete | |
418 | */ | |
419 | udelay(50); | |
932394ac WD |
420 | |
421 | ret = this->read_byte(mtd) << 8; | |
422 | ret |= this->read_byte(mtd); | |
423 | ||
424 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
425 | /* First chip probe. See if we get same results by 32-bit access */ | |
426 | union { | |
427 | uint32_t dword; | |
428 | uint8_t byte[4]; | |
429 | } ident; | |
430 | void __iomem *docptr = doc->virtadr; | |
431 | ||
cfa460ad WJ |
432 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
433 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
434 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
435 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
436 | NAND_NCE | NAND_CTRL_CHANGE); | |
437 | ||
438 | udelay(50); | |
932394ac WD |
439 | |
440 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); | |
441 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
442 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
443 | this->read_buf = &doc2000_readbuf_dword; | |
444 | } | |
445 | } | |
ac7eb8a3 | 446 | |
932394ac WD |
447 | return ret; |
448 | } | |
449 | ||
450 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
451 | { | |
452 | struct nand_chip *this = mtd->priv; | |
453 | struct doc_priv *doc = this->priv; | |
454 | uint16_t mfrid; | |
455 | int i; | |
456 | ||
457 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
458 | doc->chips_per_floor = 4; | |
459 | ||
460 | /* Find out what the first chip is */ | |
461 | mfrid = doc200x_ident_chip(mtd, 0); | |
462 | ||
463 | /* Find how many chips in each floor. */ | |
464 | for (i = 1; i < 4; i++) { | |
465 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
466 | break; | |
467 | } | |
468 | doc->chips_per_floor = i; | |
469 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
470 | } | |
471 | ||
cfa460ad | 472 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
932394ac WD |
473 | { |
474 | struct doc_priv *doc = this->priv; | |
475 | ||
476 | int status; | |
ac7eb8a3 | 477 | |
932394ac WD |
478 | DoC_WaitReady(doc); |
479 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
480 | DoC_WaitReady(doc); | |
481 | status = (int)this->read_byte(mtd); | |
482 | ||
483 | return status; | |
484 | } | |
485 | ||
486 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
487 | { | |
488 | struct nand_chip *this = mtd->priv; | |
489 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 490 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
491 | |
492 | WriteDOC(datum, docptr, CDSNSlowIO); | |
493 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
494 | WriteDOC(datum, docptr, WritePipeTerm); | |
495 | } | |
496 | ||
497 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
498 | { | |
499 | struct nand_chip *this = mtd->priv; | |
500 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 501 | void __iomem *docptr = doc->virtadr; |
932394ac | 502 | |
cfa460ad | 503 | //ReadDOC(docptr, CDSNSlowIO); |
932394ac WD |
504 | /* 11.4.5 -- delay twice to allow extended length cycle */ |
505 | DoC_Delay(doc, 2); | |
506 | ReadDOC(docptr, ReadPipeInit); | |
cfa460ad | 507 | //return ReadDOC(docptr, Mil_CDSN_IO); |
932394ac WD |
508 | return ReadDOC(docptr, LastDataRead); |
509 | } | |
510 | ||
cfa460ad | 511 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
512 | { |
513 | struct nand_chip *this = mtd->priv; | |
514 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 515 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
516 | int i; |
517 | ||
cfa460ad | 518 | for (i = 0; i < len; i++) |
932394ac WD |
519 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
520 | /* Terminate write pipeline */ | |
521 | WriteDOC(0x00, docptr, WritePipeTerm); | |
522 | } | |
523 | ||
cfa460ad | 524 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
932394ac WD |
525 | { |
526 | struct nand_chip *this = mtd->priv; | |
527 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 528 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
529 | int i; |
530 | ||
531 | /* Start read pipeline */ | |
532 | ReadDOC(docptr, ReadPipeInit); | |
533 | ||
cfa460ad | 534 | for (i = 0; i < len - 1; i++) |
932394ac WD |
535 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
536 | ||
537 | /* Terminate read pipeline */ | |
538 | buf[i] = ReadDOC(docptr, LastDataRead); | |
539 | } | |
540 | ||
cfa460ad | 541 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
542 | { |
543 | struct nand_chip *this = mtd->priv; | |
544 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 545 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
546 | int i; |
547 | ||
548 | /* Start read pipeline */ | |
549 | ReadDOC(docptr, ReadPipeInit); | |
550 | ||
cfa460ad | 551 | for (i = 0; i < len - 1; i++) |
932394ac WD |
552 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
553 | ReadDOC(docptr, LastDataRead); | |
554 | return i; | |
555 | } | |
556 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
557 | return i; | |
558 | return 0; | |
559 | } | |
560 | ||
561 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
562 | { | |
563 | struct nand_chip *this = mtd->priv; | |
564 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 565 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
566 | u_char ret; |
567 | ||
ac7eb8a3 WD |
568 | ReadDOC(docptr, Mplus_ReadPipeInit); |
569 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
570 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
cfa460ad WJ |
571 | if (debug) |
572 | printk("read_byte returns %02x\n", ret); | |
932394ac WD |
573 | return ret; |
574 | } | |
575 | ||
cfa460ad | 576 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
577 | { |
578 | struct nand_chip *this = mtd->priv; | |
579 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 580 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
581 | int i; |
582 | ||
cfa460ad WJ |
583 | if (debug) |
584 | printk("writebuf of %d bytes: ", len); | |
585 | for (i = 0; i < len; i++) { | |
932394ac WD |
586 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
587 | if (debug && i < 16) | |
588 | printk("%02x ", buf[i]); | |
589 | } | |
cfa460ad WJ |
590 | if (debug) |
591 | printk("\n"); | |
932394ac WD |
592 | } |
593 | ||
cfa460ad | 594 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
932394ac WD |
595 | { |
596 | struct nand_chip *this = mtd->priv; | |
597 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 598 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
599 | int i; |
600 | ||
cfa460ad WJ |
601 | if (debug) |
602 | printk("readbuf of %d bytes: ", len); | |
932394ac WD |
603 | |
604 | /* Start read pipeline */ | |
605 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
606 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
607 | ||
cfa460ad | 608 | for (i = 0; i < len - 2; i++) { |
932394ac WD |
609 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
610 | if (debug && i < 16) | |
611 | printk("%02x ", buf[i]); | |
612 | } | |
613 | ||
614 | /* Terminate read pipeline */ | |
cfa460ad | 615 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
932394ac | 616 | if (debug && i < 16) |
cfa460ad WJ |
617 | printk("%02x ", buf[len - 2]); |
618 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
932394ac | 619 | if (debug && i < 16) |
cfa460ad WJ |
620 | printk("%02x ", buf[len - 1]); |
621 | if (debug) | |
622 | printk("\n"); | |
932394ac WD |
623 | } |
624 | ||
cfa460ad | 625 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
626 | { |
627 | struct nand_chip *this = mtd->priv; | |
628 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 629 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
630 | int i; |
631 | ||
cfa460ad WJ |
632 | if (debug) |
633 | printk("verifybuf of %d bytes: ", len); | |
932394ac WD |
634 | |
635 | /* Start read pipeline */ | |
636 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
637 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
638 | ||
cfa460ad | 639 | for (i = 0; i < len - 2; i++) |
932394ac WD |
640 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
641 | ReadDOC(docptr, Mplus_LastDataRead); | |
642 | ReadDOC(docptr, Mplus_LastDataRead); | |
643 | return i; | |
644 | } | |
cfa460ad WJ |
645 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
646 | return len - 2; | |
647 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
648 | return len - 1; | |
932394ac WD |
649 | return 0; |
650 | } | |
651 | ||
652 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
653 | { | |
654 | struct nand_chip *this = mtd->priv; | |
655 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 656 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
657 | int floor = 0; |
658 | ||
cfa460ad WJ |
659 | if (debug) |
660 | printk("select chip (%d)\n", chip); | |
932394ac WD |
661 | |
662 | if (chip == -1) { | |
663 | /* Disable flash internally */ | |
664 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
665 | return; | |
666 | } | |
667 | ||
668 | floor = chip / doc->chips_per_floor; | |
cfa460ad | 669 | chip -= (floor * doc->chips_per_floor); |
932394ac WD |
670 | |
671 | /* Assert ChipEnable and deassert WriteProtect */ | |
672 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
673 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
674 | ||
675 | doc->curchip = chip; | |
676 | doc->curfloor = floor; | |
677 | } | |
678 | ||
679 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
680 | { | |
681 | struct nand_chip *this = mtd->priv; | |
682 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 683 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
684 | int floor = 0; |
685 | ||
cfa460ad WJ |
686 | if (debug) |
687 | printk("select chip (%d)\n", chip); | |
932394ac WD |
688 | |
689 | if (chip == -1) | |
690 | return; | |
691 | ||
692 | floor = chip / doc->chips_per_floor; | |
cfa460ad | 693 | chip -= (floor * doc->chips_per_floor); |
932394ac WD |
694 | |
695 | /* 11.4.4 -- deassert CE before changing chip */ | |
cfa460ad | 696 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
932394ac WD |
697 | |
698 | WriteDOC(floor, docptr, FloorSelect); | |
699 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
700 | ||
cfa460ad | 701 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
932394ac WD |
702 | |
703 | doc->curchip = chip; | |
704 | doc->curfloor = floor; | |
705 | } | |
706 | ||
cfa460ad WJ |
707 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
708 | ||
709 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
710 | unsigned int ctrl) | |
932394ac WD |
711 | { |
712 | struct nand_chip *this = mtd->priv; | |
713 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 714 | void __iomem *docptr = doc->virtadr; |
932394ac | 715 | |
cfa460ad WJ |
716 | if (ctrl & NAND_CTRL_CHANGE) { |
717 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
718 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
719 | if (debug) | |
720 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
721 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
722 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
723 | DoC_Delay(doc, 4); | |
724 | } | |
725 | if (cmd != NAND_CMD_NONE) { | |
726 | if (DoC_is_2000(doc)) | |
727 | doc2000_write_byte(mtd, cmd); | |
728 | else | |
729 | doc2001_write_byte(mtd, cmd); | |
932394ac | 730 | } |
932394ac WD |
731 | } |
732 | ||
cfa460ad | 733 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
932394ac WD |
734 | { |
735 | struct nand_chip *this = mtd->priv; | |
736 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 737 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
738 | |
739 | /* | |
740 | * Must terminate write pipeline before sending any commands | |
741 | * to the device. | |
742 | */ | |
743 | if (command == NAND_CMD_PAGEPROG) { | |
744 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
745 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
746 | } | |
747 | ||
748 | /* | |
749 | * Write out the command to the device. | |
750 | */ | |
751 | if (command == NAND_CMD_SEQIN) { | |
752 | int readcmd; | |
753 | ||
cfa460ad | 754 | if (column >= mtd->writesize) { |
932394ac | 755 | /* OOB area */ |
cfa460ad | 756 | column -= mtd->writesize; |
932394ac WD |
757 | readcmd = NAND_CMD_READOOB; |
758 | } else if (column < 256) { | |
759 | /* First 256 bytes --> READ0 */ | |
760 | readcmd = NAND_CMD_READ0; | |
761 | } else { | |
762 | column -= 256; | |
763 | readcmd = NAND_CMD_READ1; | |
764 | } | |
765 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
766 | } | |
767 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
768 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
769 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
770 | ||
771 | if (column != -1 || page_addr != -1) { | |
772 | /* Serially input address */ | |
773 | if (column != -1) { | |
774 | /* Adjust columns for 16 bit buswidth */ | |
775 | if (this->options & NAND_BUSWIDTH_16) | |
776 | column >>= 1; | |
777 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
778 | } | |
779 | if (page_addr != -1) { | |
cfa460ad WJ |
780 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
781 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
932394ac WD |
782 | /* One more address cycle for higher density devices */ |
783 | if (this->chipsize & 0x0c000000) { | |
cfa460ad | 784 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
932394ac WD |
785 | printk("high density\n"); |
786 | } | |
787 | } | |
788 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
789 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
790 | /* deassert ALE */ | |
cfa460ad WJ |
791 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
792 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
932394ac WD |
793 | WriteDOC(0, docptr, Mplus_FlashControl); |
794 | } | |
795 | ||
ac7eb8a3 | 796 | /* |
932394ac WD |
797 | * program and erase have their own busy handlers |
798 | * status and sequential in needs no delay | |
cfa460ad | 799 | */ |
932394ac WD |
800 | switch (command) { |
801 | ||
802 | case NAND_CMD_PAGEPROG: | |
803 | case NAND_CMD_ERASE1: | |
804 | case NAND_CMD_ERASE2: | |
805 | case NAND_CMD_SEQIN: | |
806 | case NAND_CMD_STATUS: | |
807 | return; | |
808 | ||
809 | case NAND_CMD_RESET: | |
810 | if (this->dev_ready) | |
811 | break; | |
812 | udelay(this->chip_delay); | |
813 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
814 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
815 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
cfa460ad | 816 | while (!(this->read_byte(mtd) & 0x40)) ; |
932394ac WD |
817 | return; |
818 | ||
cfa460ad | 819 | /* This applies to read commands */ |
932394ac | 820 | default: |
ac7eb8a3 | 821 | /* |
932394ac WD |
822 | * If we don't have access to the busy pin, we apply the given |
823 | * command delay | |
cfa460ad | 824 | */ |
932394ac | 825 | if (!this->dev_ready) { |
cfa460ad | 826 | udelay(this->chip_delay); |
932394ac WD |
827 | return; |
828 | } | |
829 | } | |
830 | ||
831 | /* Apply this short delay always to ensure that we do wait tWB in | |
832 | * any case on any machine. */ | |
cfa460ad | 833 | ndelay(100); |
932394ac | 834 | /* wait until command is processed */ |
cfa460ad | 835 | while (!this->dev_ready(mtd)) ; |
932394ac WD |
836 | } |
837 | ||
838 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
839 | { | |
840 | struct nand_chip *this = mtd->priv; | |
841 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 842 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
843 | |
844 | if (DoC_is_MillenniumPlus(doc)) { | |
845 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
846 | DoC_Delay(doc, 4); | |
847 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
cfa460ad | 848 | if (debug) |
932394ac WD |
849 | printk("not ready\n"); |
850 | return 0; | |
851 | } | |
cfa460ad WJ |
852 | if (debug) |
853 | printk("was ready\n"); | |
932394ac WD |
854 | return 1; |
855 | } else { | |
856 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
857 | DoC_Delay(doc, 4); | |
858 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
cfa460ad | 859 | if (debug) |
932394ac WD |
860 | printk("not ready\n"); |
861 | return 0; | |
862 | } | |
863 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
864 | DoC_Delay(doc, 2); | |
cfa460ad WJ |
865 | if (debug) |
866 | printk("was ready\n"); | |
932394ac WD |
867 | return 1; |
868 | } | |
869 | } | |
870 | ||
871 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
872 | { | |
873 | /* This is our last resort if we couldn't find or create a BBT. Just | |
874 | pretend all blocks are good. */ | |
875 | return 0; | |
876 | } | |
877 | ||
878 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
879 | { | |
880 | struct nand_chip *this = mtd->priv; | |
881 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 882 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
883 | |
884 | /* Prime the ECC engine */ | |
cfa460ad | 885 | switch (mode) { |
932394ac WD |
886 | case NAND_ECC_READ: |
887 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
888 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
889 | break; | |
890 | case NAND_ECC_WRITE: | |
891 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
892 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
893 | break; | |
894 | } | |
895 | } | |
896 | ||
897 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
898 | { | |
899 | struct nand_chip *this = mtd->priv; | |
900 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 901 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
902 | |
903 | /* Prime the ECC engine */ | |
cfa460ad | 904 | switch (mode) { |
932394ac WD |
905 | case NAND_ECC_READ: |
906 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
907 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
908 | break; | |
909 | case NAND_ECC_WRITE: | |
910 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
911 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
912 | break; | |
913 | } | |
914 | } | |
915 | ||
916 | /* This code is only called on write */ | |
cfa460ad | 917 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
932394ac WD |
918 | { |
919 | struct nand_chip *this = mtd->priv; | |
920 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 921 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
922 | int i; |
923 | int emptymatch = 1; | |
924 | ||
925 | /* flush the pipeline */ | |
926 | if (DoC_is_2000(doc)) { | |
927 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
928 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
929 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
930 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
931 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
932 | } else if (DoC_is_MillenniumPlus(doc)) { | |
933 | WriteDOC(0, docptr, Mplus_NOP); | |
934 | WriteDOC(0, docptr, Mplus_NOP); | |
935 | WriteDOC(0, docptr, Mplus_NOP); | |
936 | } else { | |
937 | WriteDOC(0, docptr, NOP); | |
938 | WriteDOC(0, docptr, NOP); | |
939 | WriteDOC(0, docptr, NOP); | |
940 | } | |
941 | ||
942 | for (i = 0; i < 6; i++) { | |
943 | if (DoC_is_MillenniumPlus(doc)) | |
944 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
ac7eb8a3 | 945 | else |
932394ac WD |
946 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
947 | if (ecc_code[i] != empty_write_ecc[i]) | |
948 | emptymatch = 0; | |
949 | } | |
950 | if (DoC_is_MillenniumPlus(doc)) | |
951 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
952 | else | |
953 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
954 | #if 0 | |
955 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
956 | if (emptymatch) { | |
957 | /* Note: this somewhat expensive test should not be triggered | |
958 | often. It could be optimized away by examining the data in | |
959 | the writebuf routine, and remembering the result. */ | |
960 | for (i = 0; i < 512; i++) { | |
cfa460ad WJ |
961 | if (dat[i] == 0xff) |
962 | continue; | |
932394ac WD |
963 | emptymatch = 0; |
964 | break; | |
965 | } | |
966 | } | |
967 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
968 | Return all-0xff ecc value instead of the computed one, so | |
969 | it'll look just like a freshly-erased page. */ | |
cfa460ad WJ |
970 | if (emptymatch) |
971 | memset(ecc_code, 0xff, 6); | |
932394ac WD |
972 | #endif |
973 | return 0; | |
974 | } | |
975 | ||
cfa460ad WJ |
976 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
977 | u_char *read_ecc, u_char *isnull) | |
932394ac WD |
978 | { |
979 | int i, ret = 0; | |
980 | struct nand_chip *this = mtd->priv; | |
981 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 982 | void __iomem *docptr = doc->virtadr; |
cfa460ad | 983 | uint8_t calc_ecc[6]; |
932394ac WD |
984 | volatile u_char dummy; |
985 | int emptymatch = 1; | |
ac7eb8a3 | 986 | |
932394ac WD |
987 | /* flush the pipeline */ |
988 | if (DoC_is_2000(doc)) { | |
989 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
990 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
991 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
992 | } else if (DoC_is_MillenniumPlus(doc)) { | |
993 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
994 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
995 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
996 | } else { | |
997 | dummy = ReadDOC(docptr, ECCConf); | |
998 | dummy = ReadDOC(docptr, ECCConf); | |
999 | dummy = ReadDOC(docptr, ECCConf); | |
1000 | } | |
ac7eb8a3 | 1001 | |
932394ac WD |
1002 | /* Error occured ? */ |
1003 | if (dummy & 0x80) { | |
1004 | for (i = 0; i < 6; i++) { | |
1005 | if (DoC_is_MillenniumPlus(doc)) | |
1006 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
1007 | else | |
1008 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
1009 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
1010 | emptymatch = 0; | |
1011 | } | |
1012 | /* If emptymatch=1, the read syndrome is consistent with an | |
1013 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1014 | if (emptymatch) { | |
1015 | for (i = 0; i < 6; i++) { | |
cfa460ad WJ |
1016 | if (read_ecc[i] == 0xff) |
1017 | continue; | |
932394ac WD |
1018 | emptymatch = 0; |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | /* If emptymatch still =1, check the data block. */ | |
1023 | if (emptymatch) { | |
cfa460ad WJ |
1024 | /* Note: this somewhat expensive test should not be triggered |
1025 | often. It could be optimized away by examining the data in | |
1026 | the readbuf routine, and remembering the result. */ | |
932394ac | 1027 | for (i = 0; i < 512; i++) { |
cfa460ad WJ |
1028 | if (dat[i] == 0xff) |
1029 | continue; | |
932394ac WD |
1030 | emptymatch = 0; |
1031 | break; | |
1032 | } | |
1033 | } | |
1034 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1035 | erased block, in which case the ECC will not come out right. | |
1036 | We'll suppress the error and tell the caller everything's | |
1037 | OK. Because it is. */ | |
cfa460ad WJ |
1038 | if (!emptymatch) |
1039 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
932394ac WD |
1040 | if (ret > 0) |
1041 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
ac7eb8a3 | 1042 | } |
932394ac WD |
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 | } | |
ac7eb8a3 | 1053 | |
cfa460ad WJ |
1054 | //u_char mydatabuf[528]; |
1055 | ||
1056 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) | |
1057 | * attempt to retain compatibility. It used to read: | |
1058 | * .oobfree = { {8, 8} } | |
1059 | * Since that leaves two bytes unusable, it was changed. But the following | |
1060 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1061 | * .oobfree = { {6, 10} } | |
1062 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1063 | * safer. The only problem with it is that any code that parses oobfree must | |
1064 | * be able to handle out-of-order segments. | |
1065 | */ | |
1066 | static struct nand_ecclayout doc200x_oobinfo = { | |
ac7eb8a3 WD |
1067 | .eccbytes = 6, |
1068 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
cfa460ad | 1069 | .oobfree = {{8, 8}, {6, 2}} |
932394ac | 1070 | }; |
ac7eb8a3 | 1071 | |
932394ac WD |
1072 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
1073 | On sucessful return, buf will contain a copy of the media header for | |
1074 | further processing. id is the string to scan for, and will presumably be | |
1075 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1076 | header. The page #s of the found media headers are placed in mh0_page and | |
1077 | mh1_page in the DOC private structure. */ | |
cfa460ad | 1078 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
932394ac WD |
1079 | { |
1080 | struct nand_chip *this = mtd->priv; | |
1081 | struct doc_priv *doc = this->priv; | |
cfa460ad | 1082 | unsigned offs; |
932394ac WD |
1083 | int ret; |
1084 | size_t retlen; | |
1085 | ||
cfa460ad WJ |
1086 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
1087 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); | |
1088 | if (retlen != mtd->writesize) | |
1089 | continue; | |
932394ac | 1090 | if (ret) { |
cfa460ad | 1091 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
932394ac | 1092 | } |
cfa460ad WJ |
1093 | if (memcmp(buf, id, 6)) |
1094 | continue; | |
932394ac WD |
1095 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1096 | if (doc->mh0_page == -1) { | |
1097 | doc->mh0_page = offs >> this->page_shift; | |
cfa460ad WJ |
1098 | if (!findmirror) |
1099 | return 1; | |
932394ac WD |
1100 | continue; |
1101 | } | |
1102 | doc->mh1_page = offs >> this->page_shift; | |
1103 | return 2; | |
1104 | } | |
1105 | if (doc->mh0_page == -1) { | |
1106 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1107 | return 0; | |
1108 | } | |
1109 | /* Only one mediaheader was found. We want buf to contain a | |
1110 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1111 | offs = doc->mh0_page << this->page_shift; | |
cfa460ad WJ |
1112 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1113 | if (retlen != mtd->writesize) { | |
932394ac WD |
1114 | /* Insanity. Give up. */ |
1115 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1116 | return 0; | |
1117 | } | |
1118 | return 1; | |
1119 | } | |
1120 | ||
cfa460ad | 1121 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
932394ac WD |
1122 | { |
1123 | struct nand_chip *this = mtd->priv; | |
1124 | struct doc_priv *doc = this->priv; | |
1125 | int ret = 0; | |
1126 | u_char *buf; | |
1127 | struct NFTLMediaHeader *mh; | |
1128 | const unsigned psize = 1 << this->page_shift; | |
cfa460ad | 1129 | int numparts = 0; |
932394ac WD |
1130 | unsigned blocks, maxblocks; |
1131 | int offs, numheaders; | |
1132 | ||
cfa460ad | 1133 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
932394ac WD |
1134 | if (!buf) { |
1135 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1136 | return 0; | |
1137 | } | |
cfa460ad WJ |
1138 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1139 | goto out; | |
1140 | mh = (struct NFTLMediaHeader *)buf; | |
1141 | ||
1142 | mh->NumEraseUnits = le16_to_cpu(mh->NumEraseUnits); | |
1143 | mh->FirstPhysicalEUN = le16_to_cpu(mh->FirstPhysicalEUN); | |
1144 | mh->FormattedSize = le32_to_cpu(mh->FormattedSize); | |
932394ac | 1145 | |
932394ac WD |
1146 | printk(KERN_INFO " DataOrgID = %s\n" |
1147 | " NumEraseUnits = %d\n" | |
1148 | " FirstPhysicalEUN = %d\n" | |
1149 | " FormattedSize = %d\n" | |
1150 | " UnitSizeFactor = %d\n", | |
1151 | mh->DataOrgID, mh->NumEraseUnits, | |
1152 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1153 | mh->UnitSizeFactor); | |
932394ac WD |
1154 | |
1155 | blocks = mtd->size >> this->phys_erase_shift; | |
1156 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1157 | ||
1158 | if (mh->UnitSizeFactor == 0x00) { | |
1159 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1160 | - There can be at most 32768 virtual blocks. | |
1161 | - There can be at most (virtual block size - page size) | |
cfa460ad WJ |
1162 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1163 | */ | |
932394ac WD |
1164 | mh->UnitSizeFactor = 0xff; |
1165 | while (blocks > maxblocks) { | |
1166 | blocks >>= 1; | |
1167 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1168 | mh->UnitSizeFactor--; | |
1169 | } | |
1170 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1171 | } | |
1172 | ||
1173 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1174 | layers; variables with have already been configured by nand_scan. | |
1175 | Unfortunately, we didn't know before this point what these values | |
1176 | should be. Thus, this code is somewhat dependant on the exact | |
1177 | implementation of the NAND layer. */ | |
1178 | if (mh->UnitSizeFactor != 0xff) { | |
1179 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1180 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1181 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1182 | blocks = mtd->size >> this->bbt_erase_shift; | |
1183 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1184 | } | |
1185 | ||
1186 | if (blocks > maxblocks) { | |
1187 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1188 | goto out; | |
1189 | } | |
1190 | ||
1191 | /* Skip past the media headers. */ | |
1192 | offs = max(doc->mh0_page, doc->mh1_page); | |
1193 | offs <<= this->page_shift; | |
1194 | offs += mtd->erasesize; | |
1195 | ||
cfa460ad WJ |
1196 | if (show_firmware_partition == 1) { |
1197 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1198 | parts[0].offset = 0; | |
1199 | parts[0].size = offs; | |
1200 | numparts = 1; | |
1201 | } | |
1202 | ||
1203 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1204 | parts[numparts].offset = offs; | |
1205 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
932394ac | 1206 | |
cfa460ad WJ |
1207 | offs += parts[numparts].size; |
1208 | numparts++; | |
932394ac | 1209 | |
932394ac | 1210 | if (offs < mtd->size) { |
cfa460ad WJ |
1211 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1212 | parts[numparts].offset = offs; | |
1213 | parts[numparts].size = mtd->size - offs; | |
1214 | numparts++; | |
932394ac | 1215 | } |
cfa460ad WJ |
1216 | |
1217 | ret = numparts; | |
1218 | out: | |
932394ac WD |
1219 | kfree(buf); |
1220 | return ret; | |
1221 | } | |
1222 | ||
1223 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
cfa460ad | 1224 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
932394ac WD |
1225 | { |
1226 | struct nand_chip *this = mtd->priv; | |
1227 | struct doc_priv *doc = this->priv; | |
1228 | int ret = 0; | |
1229 | u_char *buf; | |
1230 | struct INFTLMediaHeader *mh; | |
1231 | struct INFTLPartition *ip; | |
1232 | int numparts = 0; | |
1233 | int blocks; | |
1234 | int vshift, lastvunit = 0; | |
1235 | int i; | |
1236 | int end = mtd->size; | |
1237 | ||
1238 | if (inftl_bbt_write) | |
1239 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1240 | ||
cfa460ad | 1241 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
932394ac WD |
1242 | if (!buf) { |
1243 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1244 | return 0; | |
1245 | } | |
1246 | ||
cfa460ad WJ |
1247 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1248 | goto out; | |
932394ac | 1249 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
cfa460ad | 1250 | mh = (struct INFTLMediaHeader *)buf; |
932394ac WD |
1251 | |
1252 | mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks); | |
1253 | mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions); | |
1254 | mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions); | |
1255 | mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits); | |
1256 | mh->FormatFlags = le32_to_cpu(mh->FormatFlags); | |
1257 | mh->PercentUsed = le32_to_cpu(mh->PercentUsed); | |
ac7eb8a3 | 1258 | |
932394ac WD |
1259 | printk(KERN_INFO " bootRecordID = %s\n" |
1260 | " NoOfBootImageBlocks = %d\n" | |
1261 | " NoOfBinaryPartitions = %d\n" | |
1262 | " NoOfBDTLPartitions = %d\n" | |
1263 | " BlockMultiplerBits = %d\n" | |
1264 | " FormatFlgs = %d\n" | |
1265 | " OsakVersion = %d.%d.%d.%d\n" | |
1266 | " PercentUsed = %d\n", | |
1267 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1268 | mh->NoOfBinaryPartitions, | |
1269 | mh->NoOfBDTLPartitions, | |
1270 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1271 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1272 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1273 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1274 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1275 | mh->PercentUsed); | |
932394ac WD |
1276 | |
1277 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1278 | ||
1279 | blocks = mtd->size >> vshift; | |
1280 | if (blocks > 32768) { | |
1281 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1282 | goto out; | |
1283 | } | |
1284 | ||
1285 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1286 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1287 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1288 | goto out; | |
1289 | } | |
1290 | ||
1291 | /* Scan the partitions */ | |
1292 | for (i = 0; (i < 4); i++) { | |
1293 | ip = &(mh->Partitions[i]); | |
1294 | ip->virtualUnits = le32_to_cpu(ip->virtualUnits); | |
1295 | ip->firstUnit = le32_to_cpu(ip->firstUnit); | |
1296 | ip->lastUnit = le32_to_cpu(ip->lastUnit); | |
1297 | ip->flags = le32_to_cpu(ip->flags); | |
1298 | ip->spareUnits = le32_to_cpu(ip->spareUnits); | |
1299 | ip->Reserved0 = le32_to_cpu(ip->Reserved0); | |
1300 | ||
932394ac WD |
1301 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1302 | " virtualUnits = %d\n" | |
1303 | " firstUnit = %d\n" | |
1304 | " lastUnit = %d\n" | |
1305 | " flags = 0x%x\n" | |
1306 | " spareUnits = %d\n", | |
1307 | i, ip->virtualUnits, ip->firstUnit, | |
1308 | ip->lastUnit, ip->flags, | |
1309 | ip->spareUnits); | |
932394ac | 1310 | |
cfa460ad WJ |
1311 | if ((show_firmware_partition == 1) && |
1312 | (i == 0) && (ip->firstUnit > 0)) { | |
932394ac WD |
1313 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1314 | parts[0].offset = 0; | |
1315 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1316 | numparts = 1; | |
1317 | } | |
932394ac WD |
1318 | |
1319 | if (ip->flags & INFTL_BINARY) | |
1320 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1321 | else | |
1322 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1323 | parts[numparts].offset = ip->firstUnit << vshift; | |
1324 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1325 | numparts++; | |
cfa460ad WJ |
1326 | if (ip->lastUnit > lastvunit) |
1327 | lastvunit = ip->lastUnit; | |
1328 | if (ip->flags & INFTL_LAST) | |
1329 | break; | |
932394ac WD |
1330 | } |
1331 | lastvunit++; | |
1332 | if ((lastvunit << vshift) < end) { | |
1333 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1334 | parts[numparts].offset = lastvunit << vshift; | |
1335 | parts[numparts].size = end - parts[numparts].offset; | |
1336 | numparts++; | |
1337 | } | |
1338 | ret = numparts; | |
cfa460ad | 1339 | out: |
932394ac WD |
1340 | kfree(buf); |
1341 | return ret; | |
1342 | } | |
1343 | ||
1344 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1345 | { | |
1346 | int ret, numparts; | |
1347 | struct nand_chip *this = mtd->priv; | |
1348 | struct doc_priv *doc = this->priv; | |
1349 | struct mtd_partition parts[2]; | |
1350 | ||
cfa460ad | 1351 | memset((char *)parts, 0, sizeof(parts)); |
932394ac WD |
1352 | /* On NFTL, we have to find the media headers before we can read the |
1353 | BBTs, since they're stored in the media header eraseblocks. */ | |
1354 | numparts = nftl_partscan(mtd, parts); | |
cfa460ad WJ |
1355 | if (!numparts) |
1356 | return -EIO; | |
932394ac WD |
1357 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1358 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1359 | NAND_BBT_VERSION; | |
1360 | this->bbt_td->veroffs = 7; | |
1361 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1362 | if (doc->mh1_page != -1) { | |
1363 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1364 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1365 | NAND_BBT_VERSION; | |
1366 | this->bbt_md->veroffs = 7; | |
1367 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1368 | } else { | |
1369 | this->bbt_md = NULL; | |
1370 | } | |
1371 | ||
1372 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1373 | At least as nand_bbt.c is currently written. */ | |
1374 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1375 | return ret; | |
1376 | add_mtd_device(mtd); | |
1377 | #ifdef CONFIG_MTD_PARTITIONS | |
1378 | if (!no_autopart) | |
1379 | add_mtd_partitions(mtd, parts, numparts); | |
1380 | #endif | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1385 | { | |
1386 | int ret, numparts; | |
1387 | struct nand_chip *this = mtd->priv; | |
1388 | struct doc_priv *doc = this->priv; | |
1389 | struct mtd_partition parts[5]; | |
1390 | ||
1391 | if (this->numchips > doc->chips_per_floor) { | |
1392 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1393 | return -EIO; | |
1394 | } | |
1395 | ||
1396 | if (DoC_is_MillenniumPlus(doc)) { | |
1397 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1398 | if (inftl_bbt_write) | |
1399 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1400 | this->bbt_td->pages[0] = 2; | |
1401 | this->bbt_md = NULL; | |
1402 | } else { | |
cfa460ad | 1403 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
932394ac WD |
1404 | if (inftl_bbt_write) |
1405 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1406 | this->bbt_td->offs = 8; | |
1407 | this->bbt_td->len = 8; | |
1408 | this->bbt_td->veroffs = 7; | |
1409 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1410 | this->bbt_td->reserved_block_code = 0x01; | |
1411 | this->bbt_td->pattern = "MSYS_BBT"; | |
1412 | ||
cfa460ad | 1413 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
932394ac WD |
1414 | if (inftl_bbt_write) |
1415 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1416 | this->bbt_md->offs = 8; | |
1417 | this->bbt_md->len = 8; | |
1418 | this->bbt_md->veroffs = 7; | |
1419 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1420 | this->bbt_md->reserved_block_code = 0x01; | |
1421 | this->bbt_md->pattern = "TBB_SYSM"; | |
1422 | } | |
1423 | ||
1424 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1425 | At least as nand_bbt.c is currently written. */ | |
1426 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1427 | return ret; | |
cfa460ad | 1428 | memset((char *)parts, 0, sizeof(parts)); |
932394ac WD |
1429 | numparts = inftl_partscan(mtd, parts); |
1430 | /* At least for now, require the INFTL Media Header. We could probably | |
1431 | do without it for non-INFTL use, since all it gives us is | |
1432 | autopartitioning, but I want to give it more thought. */ | |
cfa460ad WJ |
1433 | if (!numparts) |
1434 | return -EIO; | |
932394ac WD |
1435 | add_mtd_device(mtd); |
1436 | #ifdef CONFIG_MTD_PARTITIONS | |
1437 | if (!no_autopart) | |
1438 | add_mtd_partitions(mtd, parts, numparts); | |
1439 | #endif | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1444 | { | |
1445 | struct nand_chip *this = mtd->priv; | |
1446 | struct doc_priv *doc = this->priv; | |
1447 | ||
932394ac WD |
1448 | this->read_byte = doc2000_read_byte; |
1449 | this->write_buf = doc2000_writebuf; | |
1450 | this->read_buf = doc2000_readbuf; | |
1451 | this->verify_buf = doc2000_verifybuf; | |
1452 | this->scan_bbt = nftl_scan_bbt; | |
1453 | ||
1454 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1455 | doc2000_count_chips(mtd); | |
1456 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1457 | return (4 * doc->chips_per_floor); | |
1458 | } | |
1459 | ||
1460 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1461 | { | |
1462 | struct nand_chip *this = mtd->priv; | |
1463 | struct doc_priv *doc = this->priv; | |
1464 | ||
932394ac WD |
1465 | this->read_byte = doc2001_read_byte; |
1466 | this->write_buf = doc2001_writebuf; | |
1467 | this->read_buf = doc2001_readbuf; | |
1468 | this->verify_buf = doc2001_verifybuf; | |
1469 | ||
1470 | ReadDOC(doc->virtadr, ChipID); | |
1471 | ReadDOC(doc->virtadr, ChipID); | |
1472 | ReadDOC(doc->virtadr, ChipID); | |
1473 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1474 | /* It's not a Millennium; it's one of the newer | |
ac7eb8a3 | 1475 | DiskOnChip 2000 units with a similar ASIC. |
932394ac WD |
1476 | Treat it like a Millennium, except that it |
1477 | can have multiple chips. */ | |
1478 | doc2000_count_chips(mtd); | |
1479 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1480 | this->scan_bbt = inftl_scan_bbt; | |
1481 | return (4 * doc->chips_per_floor); | |
1482 | } else { | |
1483 | /* Bog-standard Millennium */ | |
1484 | doc->chips_per_floor = 1; | |
1485 | mtd->name = "DiskOnChip Millennium"; | |
1486 | this->scan_bbt = nftl_scan_bbt; | |
1487 | return 1; | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1492 | { | |
1493 | struct nand_chip *this = mtd->priv; | |
1494 | struct doc_priv *doc = this->priv; | |
1495 | ||
932394ac WD |
1496 | this->read_byte = doc2001plus_read_byte; |
1497 | this->write_buf = doc2001plus_writebuf; | |
1498 | this->read_buf = doc2001plus_readbuf; | |
1499 | this->verify_buf = doc2001plus_verifybuf; | |
1500 | this->scan_bbt = inftl_scan_bbt; | |
cfa460ad | 1501 | this->cmd_ctrl = NULL; |
932394ac WD |
1502 | this->select_chip = doc2001plus_select_chip; |
1503 | this->cmdfunc = doc2001plus_command; | |
cfa460ad | 1504 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
932394ac WD |
1505 | |
1506 | doc->chips_per_floor = 1; | |
1507 | mtd->name = "DiskOnChip Millennium Plus"; | |
1508 | ||
1509 | return 1; | |
1510 | } | |
1511 | ||
cfa460ad | 1512 | static int __init doc_probe(unsigned long physadr) |
932394ac WD |
1513 | { |
1514 | unsigned char ChipID; | |
1515 | struct mtd_info *mtd; | |
1516 | struct nand_chip *nand; | |
1517 | struct doc_priv *doc; | |
1518 | void __iomem *virtadr; | |
1519 | unsigned char save_control; | |
1520 | unsigned char tmp, tmpb, tmpc; | |
1521 | int reg, len, numchips; | |
1522 | int ret = 0; | |
1523 | ||
1524 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1525 | if (!virtadr) { | |
1526 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1527 | return -EIO; | |
1528 | } | |
1529 | ||
1530 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1531 | * bootup procedure will put the device into reset mode, and | |
1532 | * it's not possible to talk to it without actually writing | |
1533 | * to the DOCControl register. So we store the current contents | |
1534 | * of the DOCControl register's location, in case we later decide | |
1535 | * that it's not a DiskOnChip, and want to put it back how we | |
ac7eb8a3 | 1536 | * found it. |
932394ac WD |
1537 | */ |
1538 | save_control = ReadDOC(virtadr, DOCControl); | |
1539 | ||
1540 | /* Reset the DiskOnChip ASIC */ | |
cfa460ad WJ |
1541 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1542 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
932394ac WD |
1543 | |
1544 | /* Enable the DiskOnChip ASIC */ | |
cfa460ad WJ |
1545 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1546 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
932394ac WD |
1547 | |
1548 | ChipID = ReadDOC(virtadr, ChipID); | |
1549 | ||
cfa460ad | 1550 | switch (ChipID) { |
932394ac WD |
1551 | case DOC_ChipID_Doc2k: |
1552 | reg = DoC_2k_ECCStatus; | |
1553 | break; | |
1554 | case DOC_ChipID_DocMil: | |
1555 | reg = DoC_ECCConf; | |
1556 | break; | |
1557 | case DOC_ChipID_DocMilPlus16: | |
1558 | case DOC_ChipID_DocMilPlus32: | |
1559 | case 0: | |
1560 | /* Possible Millennium Plus, need to do more checks */ | |
1561 | /* Possibly release from power down mode */ | |
1562 | for (tmp = 0; (tmp < 4); tmp++) | |
1563 | ReadDOC(virtadr, Mplus_Power); | |
1564 | ||
1565 | /* Reset the Millennium Plus ASIC */ | |
cfa460ad | 1566 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
932394ac WD |
1567 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1568 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1569 | ||
1570 | mdelay(1); | |
1571 | /* Enable the Millennium Plus ASIC */ | |
cfa460ad | 1572 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
932394ac WD |
1573 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1574 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1575 | mdelay(1); | |
1576 | ||
1577 | ChipID = ReadDOC(virtadr, ChipID); | |
1578 | ||
1579 | switch (ChipID) { | |
1580 | case DOC_ChipID_DocMilPlus16: | |
1581 | reg = DoC_Mplus_Toggle; | |
1582 | break; | |
1583 | case DOC_ChipID_DocMilPlus32: | |
1584 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1585 | default: | |
1586 | ret = -ENODEV; | |
1587 | goto notfound; | |
1588 | } | |
1589 | break; | |
1590 | ||
1591 | default: | |
1592 | ret = -ENODEV; | |
1593 | goto notfound; | |
1594 | } | |
1595 | /* Check the TOGGLE bit in the ECC register */ | |
cfa460ad | 1596 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
932394ac WD |
1597 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1598 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1599 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1600 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1601 | ret = -ENODEV; | |
1602 | goto notfound; | |
1603 | } | |
1604 | ||
1605 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1606 | unsigned char oldval; | |
1607 | unsigned char newval; | |
1608 | nand = mtd->priv; | |
1609 | doc = nand->priv; | |
1610 | /* Use the alias resolution register to determine if this is | |
1611 | in fact the same DOC aliased to a new address. If writes | |
1612 | to one chip's alias resolution register change the value on | |
1613 | the other chip, they're the same chip. */ | |
1614 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1615 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1616 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1617 | } else { | |
1618 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1619 | newval = ReadDOC(virtadr, AliasResolution); | |
1620 | } | |
1621 | if (oldval != newval) | |
1622 | continue; | |
1623 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1624 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1625 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
cfa460ad | 1626 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
932394ac WD |
1627 | } else { |
1628 | WriteDOC(~newval, virtadr, AliasResolution); | |
1629 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
cfa460ad | 1630 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
932394ac WD |
1631 | } |
1632 | newval = ~newval; | |
1633 | if (oldval == newval) { | |
1634 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1635 | goto notfound; | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1640 | ||
1641 | len = sizeof(struct mtd_info) + | |
cfa460ad WJ |
1642 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
1643 | mtd = kzalloc(len, GFP_KERNEL); | |
932394ac WD |
1644 | if (!mtd) { |
1645 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1646 | ret = -ENOMEM; | |
1647 | goto fail; | |
1648 | } | |
932394ac WD |
1649 | |
1650 | nand = (struct nand_chip *) (mtd + 1); | |
1651 | doc = (struct doc_priv *) (nand + 1); | |
1652 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1653 | nand->bbt_md = nand->bbt_td + 1; | |
1654 | ||
1655 | mtd->priv = nand; | |
1656 | mtd->owner = THIS_MODULE; | |
1657 | ||
1658 | nand->priv = doc; | |
1659 | nand->select_chip = doc200x_select_chip; | |
cfa460ad | 1660 | nand->cmd_ctrl = doc200x_hwcontrol; |
932394ac WD |
1661 | nand->dev_ready = doc200x_dev_ready; |
1662 | nand->waitfunc = doc200x_wait; | |
1663 | nand->block_bad = doc200x_block_bad; | |
cfa460ad WJ |
1664 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1665 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1666 | nand->ecc.correct = doc200x_correct_data; | |
932394ac | 1667 | |
cfa460ad WJ |
1668 | nand->ecc.layout = &doc200x_oobinfo; |
1669 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; | |
1670 | nand->ecc.size = 512; | |
1671 | nand->ecc.bytes = 6; | |
1672 | nand->options = NAND_USE_FLASH_BBT; | |
932394ac WD |
1673 | |
1674 | doc->physadr = physadr; | |
1675 | doc->virtadr = virtadr; | |
1676 | doc->ChipID = ChipID; | |
1677 | doc->curfloor = -1; | |
1678 | doc->curchip = -1; | |
1679 | doc->mh0_page = -1; | |
1680 | doc->mh1_page = -1; | |
1681 | doc->nextdoc = doclist; | |
1682 | ||
1683 | if (ChipID == DOC_ChipID_Doc2k) | |
1684 | numchips = doc2000_init(mtd); | |
1685 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1686 | numchips = doc2001plus_init(mtd); | |
1687 | else | |
1688 | numchips = doc2001_init(mtd); | |
1689 | ||
1690 | if ((ret = nand_scan(mtd, numchips))) { | |
1691 | /* DBB note: i believe nand_release is necessary here, as | |
1692 | buffers may have been allocated in nand_base. Check with | |
1693 | Thomas. FIX ME! */ | |
1694 | /* nand_release will call del_mtd_device, but we haven't yet | |
1695 | added it. This is handled without incident by | |
1696 | del_mtd_device, as far as I can tell. */ | |
1697 | nand_release(mtd); | |
1698 | kfree(mtd); | |
1699 | goto fail; | |
1700 | } | |
1701 | ||
1702 | /* Success! */ | |
1703 | doclist = mtd; | |
1704 | return 0; | |
1705 | ||
cfa460ad | 1706 | notfound: |
932394ac WD |
1707 | /* Put back the contents of the DOCControl register, in case it's not |
1708 | actually a DiskOnChip. */ | |
1709 | WriteDOC(save_control, virtadr, DOCControl); | |
cfa460ad | 1710 | fail: |
932394ac WD |
1711 | iounmap(virtadr); |
1712 | return ret; | |
1713 | } | |
1714 | ||
1715 | static void release_nanddoc(void) | |
1716 | { | |
53677ef1 | 1717 | struct mtd_info *mtd, *nextmtd; |
932394ac WD |
1718 | struct nand_chip *nand; |
1719 | struct doc_priv *doc; | |
1720 | ||
1721 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1722 | nand = mtd->priv; | |
1723 | doc = nand->priv; | |
1724 | ||
1725 | nextmtd = doc->nextdoc; | |
1726 | nand_release(mtd); | |
1727 | iounmap(doc->virtadr); | |
1728 | kfree(mtd); | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | static int __init init_nanddoc(void) | |
1733 | { | |
1734 | int i, ret = 0; | |
1735 | ||
1736 | /* We could create the decoder on demand, if memory is a concern. | |
ac7eb8a3 | 1737 | * This way we have it handy, if an error happens |
932394ac WD |
1738 | * |
1739 | * Symbolsize is 10 (bits) | |
1740 | * Primitve polynomial is x^10+x^3+1 | |
1741 | * first consecutive root is 510 | |
1742 | * primitve element to generate roots = 1 | |
1743 | * generator polinomial degree = 4 | |
1744 | */ | |
1745 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
53677ef1 | 1746 | if (!rs_decoder) { |
cfa460ad | 1747 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); |
932394ac WD |
1748 | return -ENOMEM; |
1749 | } | |
1750 | ||
1751 | if (doc_config_location) { | |
1752 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1753 | ret = doc_probe(doc_config_location); | |
1754 | if (ret < 0) | |
1755 | goto outerr; | |
1756 | } else { | |
cfa460ad | 1757 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
932394ac WD |
1758 | doc_probe(doc_locations[i]); |
1759 | } | |
1760 | } | |
1761 | /* No banner message any more. Print a message if no DiskOnChip | |
1762 | found, so the user knows we at least tried. */ | |
1763 | if (!doclist) { | |
1764 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1765 | ret = -ENODEV; | |
1766 | goto outerr; | |
1767 | } | |
1768 | return 0; | |
cfa460ad | 1769 | outerr: |
932394ac WD |
1770 | free_rs(rs_decoder); |
1771 | return ret; | |
1772 | } | |
1773 | ||
1774 | static void __exit cleanup_nanddoc(void) | |
1775 | { | |
1776 | /* Cleanup the nand/DoC resources */ | |
1777 | release_nanddoc(); | |
1778 | ||
1779 | /* Free the reed solomon resources */ | |
1780 | if (rs_decoder) { | |
1781 | free_rs(rs_decoder); | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | module_init(init_nanddoc); | |
1786 | module_exit(cleanup_nanddoc); | |
1787 | ||
1788 | MODULE_LICENSE("GPL"); | |
1789 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1790 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); | |
6db39708 | 1791 | #endif |