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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 | 17 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
932394ac WD |
18 | */ |
19 | ||
038ccac5 | 20 | #include <common.h> |
addb2e16 | 21 | |
932394ac WD |
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? */ | |
cfa460ad WJ |
38 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
39 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
932394ac WD |
40 | #endif |
41 | ||
42 | static unsigned long __initdata doc_locations[] = { | |
43 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) | |
cfa460ad | 44 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
ac7eb8a3 | 45 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
932394ac | 46 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
ac7eb8a3 WD |
47 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
48 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
932394ac WD |
49 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
50 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ | |
ac7eb8a3 | 51 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
932394ac | 52 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
ac7eb8a3 WD |
53 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
54 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
932394ac WD |
55 | 0xe8000, 0xea000, 0xec000, 0xee000, |
56 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ | |
cfa460ad | 57 | #else |
932394ac WD |
58 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
59 | #endif | |
60 | 0xffffffff }; | |
61 | ||
62 | static struct mtd_info *doclist = NULL; | |
63 | ||
64 | struct doc_priv { | |
65 | void __iomem *virtadr; | |
66 | unsigned long physadr; | |
67 | u_char ChipID; | |
68 | u_char CDSNControl; | |
cfa460ad | 69 | int chips_per_floor; /* The number of chips detected on each floor */ |
932394ac WD |
70 | int curfloor; |
71 | int curchip; | |
72 | int mh0_page; | |
73 | int mh1_page; | |
74 | struct mtd_info *nextdoc; | |
75 | }; | |
76 | ||
932394ac WD |
77 | /* This is the syndrome computed by the HW ecc generator upon reading an empty |
78 | page, one with all 0xff for data and stored ecc code. */ | |
79 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
cfa460ad | 80 | |
932394ac WD |
81 | /* This is the ecc value computed by the HW ecc generator upon writing an empty |
82 | page, one with all 0xff for data. */ | |
83 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
84 | ||
85 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
86 | ||
87 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
88 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
89 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
90 | ||
cfa460ad WJ |
91 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
92 | unsigned int bitmask); | |
932394ac WD |
93 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
94 | ||
cfa460ad | 95 | static int debug = 0; |
932394ac WD |
96 | module_param(debug, int, 0); |
97 | ||
cfa460ad | 98 | static int try_dword = 1; |
932394ac WD |
99 | module_param(try_dword, int, 0); |
100 | ||
cfa460ad | 101 | static int no_ecc_failures = 0; |
932394ac WD |
102 | module_param(no_ecc_failures, int, 0); |
103 | ||
cfa460ad | 104 | static int no_autopart = 0; |
932394ac | 105 | module_param(no_autopart, int, 0); |
932394ac | 106 | |
cfa460ad WJ |
107 | static int show_firmware_partition = 0; |
108 | module_param(show_firmware_partition, int, 0); | |
109 | ||
110 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE | |
111 | static int inftl_bbt_write = 1; | |
932394ac | 112 | #else |
cfa460ad | 113 | static int inftl_bbt_write = 0; |
932394ac WD |
114 | #endif |
115 | module_param(inftl_bbt_write, int, 0); | |
116 | ||
cfa460ad | 117 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
932394ac WD |
118 | module_param(doc_config_location, ulong, 0); |
119 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
120 | ||
932394ac WD |
121 | /* Sector size for HW ECC */ |
122 | #define SECTOR_SIZE 512 | |
123 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
124 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
125 | /* Number of roots */ | |
126 | #define NROOTS 4 | |
127 | /* First consective root */ | |
128 | #define FCR 510 | |
129 | /* Number of symbols */ | |
130 | #define NN 1023 | |
131 | ||
132 | /* the Reed Solomon control structure */ | |
133 | static struct rs_control *rs_decoder; | |
134 | ||
ac7eb8a3 | 135 | /* |
932394ac WD |
136 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
137 | * which we must convert to a standard syndrom usable by the generic | |
138 | * Reed-Solomon library code. | |
139 | * | |
140 | * Fabrice Bellard figured this out in the old docecc code. I added | |
141 | * some comments, improved a minor bit and converted it to make use | |
142 | * of the generic Reed-Solomon libary. tglx | |
143 | */ | |
cfa460ad | 144 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
932394ac WD |
145 | { |
146 | int i, j, nerr, errpos[8]; | |
147 | uint8_t parity; | |
148 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
149 | ||
150 | /* Convert the ecc bytes into words */ | |
151 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
152 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
153 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
154 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
155 | parity = ecc[1]; | |
156 | ||
157 | /* Initialize the syndrom buffer */ | |
158 | for (i = 0; i < NROOTS; i++) | |
159 | s[i] = ds[0]; | |
ac7eb8a3 WD |
160 | /* |
161 | * Evaluate | |
932394ac WD |
162 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
163 | * where x = alpha^(FCR + i) | |
164 | */ | |
cfa460ad WJ |
165 | for (j = 1; j < NROOTS; j++) { |
166 | if (ds[j] == 0) | |
932394ac WD |
167 | continue; |
168 | tmp = rs->index_of[ds[j]]; | |
cfa460ad | 169 | for (i = 0; i < NROOTS; i++) |
932394ac WD |
170 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
171 | } | |
172 | ||
173 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
174 | for (i = 0; i < NROOTS; i++) { | |
175 | if (syn[i]) | |
53677ef1 | 176 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
932394ac WD |
177 | } |
178 | /* Call the decoder library */ | |
179 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
180 | ||
181 | /* Incorrectable errors ? */ | |
182 | if (nerr < 0) | |
183 | return nerr; | |
184 | ||
ac7eb8a3 | 185 | /* |
932394ac WD |
186 | * Correct the errors. The bitpositions are a bit of magic, |
187 | * but they are given by the design of the de/encoder circuit | |
188 | * in the DoC ASIC's. | |
189 | */ | |
cfa460ad | 190 | for (i = 0; i < nerr; i++) { |
932394ac WD |
191 | int index, bitpos, pos = 1015 - errpos[i]; |
192 | uint8_t val; | |
193 | if (pos >= NB_DATA && pos < 1019) | |
194 | continue; | |
195 | if (pos < NB_DATA) { | |
196 | /* extract bit position (MSB first) */ | |
197 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
198 | /* now correct the following 10 bits. At most two bytes | |
199 | can be modified since pos is even */ | |
200 | index = (pos >> 3) ^ 1; | |
201 | bitpos = pos & 7; | |
cfa460ad | 202 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
932394ac WD |
203 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
204 | parity ^= val; | |
205 | if (index < SECTOR_SIZE) | |
206 | data[index] ^= val; | |
207 | } | |
208 | index = ((pos >> 3) + 1) ^ 1; | |
209 | bitpos = (bitpos + 10) & 7; | |
210 | if (bitpos == 0) | |
211 | bitpos = 8; | |
cfa460ad WJ |
212 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
213 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
932394ac WD |
214 | parity ^= val; |
215 | if (index < SECTOR_SIZE) | |
216 | data[index] ^= val; | |
217 | } | |
218 | } | |
219 | } | |
220 | /* If the parity is wrong, no rescue possible */ | |
c45912d8 | 221 | return parity ? -EBADMSG : nerr; |
932394ac WD |
222 | } |
223 | ||
224 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
225 | { | |
226 | volatile char dummy; | |
227 | int i; | |
ac7eb8a3 | 228 | |
932394ac WD |
229 | for (i = 0; i < cycles; i++) { |
230 | if (DoC_is_Millennium(doc)) | |
231 | dummy = ReadDOC(doc->virtadr, NOP); | |
232 | else if (DoC_is_MillenniumPlus(doc)) | |
233 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
234 | else | |
235 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
236 | } | |
ac7eb8a3 | 237 | |
932394ac WD |
238 | } |
239 | ||
240 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
241 | ||
242 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
243 | static int _DoC_WaitReady(struct doc_priv *doc) | |
244 | { | |
ac7eb8a3 | 245 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
246 | unsigned long timeo = jiffies + (HZ * 10); |
247 | ||
cfa460ad WJ |
248 | if (debug) |
249 | printk("_DoC_WaitReady...\n"); | |
932394ac WD |
250 | /* Out-of-line routine to wait for chip response */ |
251 | if (DoC_is_MillenniumPlus(doc)) { | |
252 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
253 | if (time_after(jiffies, timeo)) { | |
254 | printk("_DoC_WaitReady timed out.\n"); | |
255 | return -EIO; | |
256 | } | |
257 | udelay(1); | |
258 | cond_resched(); | |
259 | } | |
260 | } else { | |
261 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
262 | if (time_after(jiffies, timeo)) { | |
263 | printk("_DoC_WaitReady timed out.\n"); | |
264 | return -EIO; | |
265 | } | |
266 | udelay(1); | |
267 | cond_resched(); | |
268 | } | |
269 | } | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
275 | { | |
ac7eb8a3 | 276 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
277 | int ret = 0; |
278 | ||
279 | if (DoC_is_MillenniumPlus(doc)) { | |
280 | DoC_Delay(doc, 4); | |
281 | ||
282 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
283 | /* Call the out-of-line routine to wait */ | |
284 | ret = _DoC_WaitReady(doc); | |
285 | } else { | |
286 | DoC_Delay(doc, 4); | |
287 | ||
288 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
289 | /* Call the out-of-line routine to wait */ | |
290 | ret = _DoC_WaitReady(doc); | |
291 | DoC_Delay(doc, 2); | |
292 | } | |
293 | ||
cfa460ad WJ |
294 | if (debug) |
295 | printk("DoC_WaitReady OK\n"); | |
932394ac WD |
296 | return ret; |
297 | } | |
298 | ||
299 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
300 | { | |
301 | struct nand_chip *this = mtd->priv; | |
302 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 303 | void __iomem *docptr = doc->virtadr; |
932394ac | 304 | |
cfa460ad WJ |
305 | if (debug) |
306 | printk("write_byte %02x\n", datum); | |
932394ac WD |
307 | WriteDOC(datum, docptr, CDSNSlowIO); |
308 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
309 | } | |
310 | ||
311 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
312 | { | |
313 | struct nand_chip *this = mtd->priv; | |
314 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 315 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
316 | u_char ret; |
317 | ||
318 | ReadDOC(docptr, CDSNSlowIO); | |
319 | DoC_Delay(doc, 2); | |
320 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
cfa460ad WJ |
321 | if (debug) |
322 | printk("read_byte returns %02x\n", ret); | |
932394ac WD |
323 | return ret; |
324 | } | |
325 | ||
cfa460ad | 326 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
327 | { |
328 | struct nand_chip *this = mtd->priv; | |
329 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 330 | void __iomem *docptr = doc->virtadr; |
932394ac | 331 | int i; |
cfa460ad WJ |
332 | if (debug) |
333 | printk("writebuf of %d bytes: ", len); | |
334 | for (i = 0; i < len; i++) { | |
932394ac WD |
335 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
336 | if (debug && i < 16) | |
337 | printk("%02x ", buf[i]); | |
338 | } | |
cfa460ad WJ |
339 | if (debug) |
340 | printk("\n"); | |
932394ac WD |
341 | } |
342 | ||
cfa460ad | 343 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
932394ac WD |
344 | { |
345 | struct nand_chip *this = mtd->priv; | |
346 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 347 | void __iomem *docptr = doc->virtadr; |
53677ef1 | 348 | int i; |
932394ac | 349 | |
cfa460ad WJ |
350 | if (debug) |
351 | printk("readbuf of %d bytes: ", len); | |
932394ac | 352 | |
cfa460ad | 353 | for (i = 0; i < len; i++) { |
932394ac WD |
354 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
355 | } | |
356 | } | |
357 | ||
ac7eb8a3 | 358 | static void doc2000_readbuf_dword(struct mtd_info *mtd, |
932394ac WD |
359 | u_char *buf, int len) |
360 | { | |
361 | struct nand_chip *this = mtd->priv; | |
362 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 363 | void __iomem *docptr = doc->virtadr; |
53677ef1 | 364 | int i; |
932394ac | 365 | |
cfa460ad WJ |
366 | if (debug) |
367 | printk("readbuf_dword of %d bytes: ", len); | |
932394ac | 368 | |
cfa460ad WJ |
369 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
370 | for (i = 0; i < len; i++) { | |
371 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
932394ac WD |
372 | } |
373 | } else { | |
cfa460ad WJ |
374 | for (i = 0; i < len; i += 4) { |
375 | *(uint32_t*) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
932394ac WD |
376 | } |
377 | } | |
378 | } | |
379 | ||
cfa460ad | 380 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
381 | { |
382 | struct nand_chip *this = mtd->priv; | |
383 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 384 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
385 | int i; |
386 | ||
cfa460ad | 387 | for (i = 0; i < len; i++) |
932394ac WD |
388 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
389 | return -EFAULT; | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
394 | { | |
395 | struct nand_chip *this = mtd->priv; | |
396 | struct doc_priv *doc = this->priv; | |
397 | uint16_t ret; | |
398 | ||
399 | doc200x_select_chip(mtd, nr); | |
cfa460ad WJ |
400 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
401 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
402 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
403 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
404 | ||
405 | /* We cant' use dev_ready here, but at least we wait for the | |
406 | * command to complete | |
407 | */ | |
408 | udelay(50); | |
932394ac WD |
409 | |
410 | ret = this->read_byte(mtd) << 8; | |
411 | ret |= this->read_byte(mtd); | |
412 | ||
413 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
414 | /* First chip probe. See if we get same results by 32-bit access */ | |
415 | union { | |
416 | uint32_t dword; | |
417 | uint8_t byte[4]; | |
418 | } ident; | |
419 | void __iomem *docptr = doc->virtadr; | |
420 | ||
cfa460ad WJ |
421 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
422 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
423 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
424 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
425 | NAND_NCE | NAND_CTRL_CHANGE); | |
426 | ||
427 | udelay(50); | |
932394ac WD |
428 | |
429 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); | |
430 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
431 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
432 | this->read_buf = &doc2000_readbuf_dword; | |
433 | } | |
434 | } | |
ac7eb8a3 | 435 | |
932394ac WD |
436 | return ret; |
437 | } | |
438 | ||
439 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
440 | { | |
441 | struct nand_chip *this = mtd->priv; | |
442 | struct doc_priv *doc = this->priv; | |
443 | uint16_t mfrid; | |
444 | int i; | |
445 | ||
446 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
447 | doc->chips_per_floor = 4; | |
448 | ||
449 | /* Find out what the first chip is */ | |
450 | mfrid = doc200x_ident_chip(mtd, 0); | |
451 | ||
452 | /* Find how many chips in each floor. */ | |
453 | for (i = 1; i < 4; i++) { | |
454 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
455 | break; | |
456 | } | |
457 | doc->chips_per_floor = i; | |
458 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
459 | } | |
460 | ||
cfa460ad | 461 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
932394ac WD |
462 | { |
463 | struct doc_priv *doc = this->priv; | |
464 | ||
465 | int status; | |
ac7eb8a3 | 466 | |
932394ac WD |
467 | DoC_WaitReady(doc); |
468 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
469 | DoC_WaitReady(doc); | |
470 | status = (int)this->read_byte(mtd); | |
471 | ||
472 | return status; | |
473 | } | |
474 | ||
475 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
476 | { | |
477 | struct nand_chip *this = mtd->priv; | |
478 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 479 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
480 | |
481 | WriteDOC(datum, docptr, CDSNSlowIO); | |
482 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
483 | WriteDOC(datum, docptr, WritePipeTerm); | |
484 | } | |
485 | ||
486 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
487 | { | |
488 | struct nand_chip *this = mtd->priv; | |
489 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 490 | void __iomem *docptr = doc->virtadr; |
932394ac | 491 | |
5e1dae5c | 492 | /*ReadDOC(docptr, CDSNSlowIO); */ |
932394ac WD |
493 | /* 11.4.5 -- delay twice to allow extended length cycle */ |
494 | DoC_Delay(doc, 2); | |
495 | ReadDOC(docptr, ReadPipeInit); | |
5e1dae5c | 496 | /*return ReadDOC(docptr, Mil_CDSN_IO); */ |
932394ac WD |
497 | return ReadDOC(docptr, LastDataRead); |
498 | } | |
499 | ||
cfa460ad | 500 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
501 | { |
502 | struct nand_chip *this = mtd->priv; | |
503 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 504 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
505 | int i; |
506 | ||
cfa460ad | 507 | for (i = 0; i < len; i++) |
932394ac WD |
508 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
509 | /* Terminate write pipeline */ | |
510 | WriteDOC(0x00, docptr, WritePipeTerm); | |
511 | } | |
512 | ||
cfa460ad | 513 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
932394ac WD |
514 | { |
515 | struct nand_chip *this = mtd->priv; | |
516 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 517 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
518 | int i; |
519 | ||
520 | /* Start read pipeline */ | |
521 | ReadDOC(docptr, ReadPipeInit); | |
522 | ||
cfa460ad | 523 | for (i = 0; i < len - 1; i++) |
932394ac WD |
524 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
525 | ||
526 | /* Terminate read pipeline */ | |
527 | buf[i] = ReadDOC(docptr, LastDataRead); | |
528 | } | |
529 | ||
cfa460ad | 530 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
531 | { |
532 | struct nand_chip *this = mtd->priv; | |
533 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 534 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
535 | int i; |
536 | ||
537 | /* Start read pipeline */ | |
538 | ReadDOC(docptr, ReadPipeInit); | |
539 | ||
cfa460ad | 540 | for (i = 0; i < len - 1; i++) |
932394ac WD |
541 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
542 | ReadDOC(docptr, LastDataRead); | |
543 | return i; | |
544 | } | |
545 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
546 | return i; | |
547 | return 0; | |
548 | } | |
549 | ||
550 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
551 | { | |
552 | struct nand_chip *this = mtd->priv; | |
553 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 554 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
555 | u_char ret; |
556 | ||
ac7eb8a3 WD |
557 | ReadDOC(docptr, Mplus_ReadPipeInit); |
558 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
559 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
cfa460ad WJ |
560 | if (debug) |
561 | printk("read_byte returns %02x\n", ret); | |
932394ac WD |
562 | return ret; |
563 | } | |
564 | ||
cfa460ad | 565 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
566 | { |
567 | struct nand_chip *this = mtd->priv; | |
568 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 569 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
570 | int i; |
571 | ||
cfa460ad WJ |
572 | if (debug) |
573 | printk("writebuf of %d bytes: ", len); | |
574 | for (i = 0; i < len; i++) { | |
932394ac WD |
575 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
576 | if (debug && i < 16) | |
577 | printk("%02x ", buf[i]); | |
578 | } | |
cfa460ad WJ |
579 | if (debug) |
580 | printk("\n"); | |
932394ac WD |
581 | } |
582 | ||
cfa460ad | 583 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
932394ac WD |
584 | { |
585 | struct nand_chip *this = mtd->priv; | |
586 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 587 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
588 | int i; |
589 | ||
cfa460ad WJ |
590 | if (debug) |
591 | printk("readbuf of %d bytes: ", len); | |
932394ac WD |
592 | |
593 | /* Start read pipeline */ | |
594 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
595 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
596 | ||
cfa460ad | 597 | for (i = 0; i < len - 2; i++) { |
932394ac WD |
598 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
599 | if (debug && i < 16) | |
600 | printk("%02x ", buf[i]); | |
601 | } | |
602 | ||
603 | /* Terminate read pipeline */ | |
cfa460ad | 604 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
932394ac | 605 | if (debug && i < 16) |
cfa460ad WJ |
606 | printk("%02x ", buf[len - 2]); |
607 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
932394ac | 608 | if (debug && i < 16) |
cfa460ad WJ |
609 | printk("%02x ", buf[len - 1]); |
610 | if (debug) | |
611 | printk("\n"); | |
932394ac WD |
612 | } |
613 | ||
cfa460ad | 614 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
932394ac WD |
615 | { |
616 | struct nand_chip *this = mtd->priv; | |
617 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 618 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
619 | int i; |
620 | ||
cfa460ad WJ |
621 | if (debug) |
622 | printk("verifybuf of %d bytes: ", len); | |
932394ac WD |
623 | |
624 | /* Start read pipeline */ | |
625 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
626 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
627 | ||
cfa460ad | 628 | for (i = 0; i < len - 2; i++) |
932394ac WD |
629 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
630 | ReadDOC(docptr, Mplus_LastDataRead); | |
631 | ReadDOC(docptr, Mplus_LastDataRead); | |
632 | return i; | |
633 | } | |
cfa460ad WJ |
634 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
635 | return len - 2; | |
636 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
637 | return len - 1; | |
932394ac WD |
638 | return 0; |
639 | } | |
640 | ||
641 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
642 | { | |
643 | struct nand_chip *this = mtd->priv; | |
644 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 645 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
646 | int floor = 0; |
647 | ||
cfa460ad WJ |
648 | if (debug) |
649 | printk("select chip (%d)\n", chip); | |
932394ac WD |
650 | |
651 | if (chip == -1) { | |
652 | /* Disable flash internally */ | |
653 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
654 | return; | |
655 | } | |
656 | ||
657 | floor = chip / doc->chips_per_floor; | |
cfa460ad | 658 | chip -= (floor * doc->chips_per_floor); |
932394ac WD |
659 | |
660 | /* Assert ChipEnable and deassert WriteProtect */ | |
661 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
662 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
663 | ||
664 | doc->curchip = chip; | |
665 | doc->curfloor = floor; | |
666 | } | |
667 | ||
668 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
669 | { | |
670 | struct nand_chip *this = mtd->priv; | |
671 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 672 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
673 | int floor = 0; |
674 | ||
cfa460ad WJ |
675 | if (debug) |
676 | printk("select chip (%d)\n", chip); | |
932394ac WD |
677 | |
678 | if (chip == -1) | |
679 | return; | |
680 | ||
681 | floor = chip / doc->chips_per_floor; | |
cfa460ad | 682 | chip -= (floor * doc->chips_per_floor); |
932394ac WD |
683 | |
684 | /* 11.4.4 -- deassert CE before changing chip */ | |
cfa460ad | 685 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
932394ac WD |
686 | |
687 | WriteDOC(floor, docptr, FloorSelect); | |
688 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
689 | ||
cfa460ad | 690 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
932394ac WD |
691 | |
692 | doc->curchip = chip; | |
693 | doc->curfloor = floor; | |
694 | } | |
695 | ||
cfa460ad WJ |
696 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
697 | ||
698 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
699 | unsigned int ctrl) | |
932394ac WD |
700 | { |
701 | struct nand_chip *this = mtd->priv; | |
702 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 703 | void __iomem *docptr = doc->virtadr; |
932394ac | 704 | |
cfa460ad WJ |
705 | if (ctrl & NAND_CTRL_CHANGE) { |
706 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
707 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
708 | if (debug) | |
709 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
710 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
711 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
712 | DoC_Delay(doc, 4); | |
713 | } | |
714 | if (cmd != NAND_CMD_NONE) { | |
715 | if (DoC_is_2000(doc)) | |
716 | doc2000_write_byte(mtd, cmd); | |
717 | else | |
718 | doc2001_write_byte(mtd, cmd); | |
932394ac | 719 | } |
932394ac WD |
720 | } |
721 | ||
cfa460ad | 722 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
932394ac WD |
723 | { |
724 | struct nand_chip *this = mtd->priv; | |
725 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 726 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
727 | |
728 | /* | |
729 | * Must terminate write pipeline before sending any commands | |
730 | * to the device. | |
731 | */ | |
732 | if (command == NAND_CMD_PAGEPROG) { | |
733 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
734 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
735 | } | |
736 | ||
737 | /* | |
738 | * Write out the command to the device. | |
739 | */ | |
740 | if (command == NAND_CMD_SEQIN) { | |
741 | int readcmd; | |
742 | ||
cfa460ad | 743 | if (column >= mtd->writesize) { |
932394ac | 744 | /* OOB area */ |
cfa460ad | 745 | column -= mtd->writesize; |
932394ac WD |
746 | readcmd = NAND_CMD_READOOB; |
747 | } else if (column < 256) { | |
748 | /* First 256 bytes --> READ0 */ | |
749 | readcmd = NAND_CMD_READ0; | |
750 | } else { | |
751 | column -= 256; | |
752 | readcmd = NAND_CMD_READ1; | |
753 | } | |
754 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
755 | } | |
756 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
757 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
758 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
759 | ||
760 | if (column != -1 || page_addr != -1) { | |
761 | /* Serially input address */ | |
762 | if (column != -1) { | |
763 | /* Adjust columns for 16 bit buswidth */ | |
764 | if (this->options & NAND_BUSWIDTH_16) | |
765 | column >>= 1; | |
766 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
767 | } | |
768 | if (page_addr != -1) { | |
cfa460ad WJ |
769 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
770 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
932394ac WD |
771 | /* One more address cycle for higher density devices */ |
772 | if (this->chipsize & 0x0c000000) { | |
cfa460ad | 773 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
932394ac WD |
774 | printk("high density\n"); |
775 | } | |
776 | } | |
777 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
778 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
779 | /* deassert ALE */ | |
cfa460ad WJ |
780 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
781 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
932394ac WD |
782 | WriteDOC(0, docptr, Mplus_FlashControl); |
783 | } | |
784 | ||
ac7eb8a3 | 785 | /* |
932394ac WD |
786 | * program and erase have their own busy handlers |
787 | * status and sequential in needs no delay | |
cfa460ad | 788 | */ |
932394ac WD |
789 | switch (command) { |
790 | ||
791 | case NAND_CMD_PAGEPROG: | |
792 | case NAND_CMD_ERASE1: | |
793 | case NAND_CMD_ERASE2: | |
794 | case NAND_CMD_SEQIN: | |
795 | case NAND_CMD_STATUS: | |
796 | return; | |
797 | ||
798 | case NAND_CMD_RESET: | |
799 | if (this->dev_ready) | |
800 | break; | |
801 | udelay(this->chip_delay); | |
802 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
803 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
804 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
cfa460ad | 805 | while (!(this->read_byte(mtd) & 0x40)) ; |
932394ac WD |
806 | return; |
807 | ||
cfa460ad | 808 | /* This applies to read commands */ |
932394ac | 809 | default: |
ac7eb8a3 | 810 | /* |
932394ac WD |
811 | * If we don't have access to the busy pin, we apply the given |
812 | * command delay | |
cfa460ad | 813 | */ |
932394ac | 814 | if (!this->dev_ready) { |
cfa460ad | 815 | udelay(this->chip_delay); |
932394ac WD |
816 | return; |
817 | } | |
818 | } | |
819 | ||
820 | /* Apply this short delay always to ensure that we do wait tWB in | |
821 | * any case on any machine. */ | |
cfa460ad | 822 | ndelay(100); |
932394ac | 823 | /* wait until command is processed */ |
cfa460ad | 824 | while (!this->dev_ready(mtd)) ; |
932394ac WD |
825 | } |
826 | ||
827 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
828 | { | |
829 | struct nand_chip *this = mtd->priv; | |
830 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 831 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
832 | |
833 | if (DoC_is_MillenniumPlus(doc)) { | |
834 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
835 | DoC_Delay(doc, 4); | |
836 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
cfa460ad | 837 | if (debug) |
932394ac WD |
838 | printk("not ready\n"); |
839 | return 0; | |
840 | } | |
cfa460ad WJ |
841 | if (debug) |
842 | printk("was ready\n"); | |
932394ac WD |
843 | return 1; |
844 | } else { | |
845 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
846 | DoC_Delay(doc, 4); | |
847 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
cfa460ad | 848 | if (debug) |
932394ac WD |
849 | printk("not ready\n"); |
850 | return 0; | |
851 | } | |
852 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
853 | DoC_Delay(doc, 2); | |
cfa460ad WJ |
854 | if (debug) |
855 | printk("was ready\n"); | |
932394ac WD |
856 | return 1; |
857 | } | |
858 | } | |
859 | ||
860 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
861 | { | |
862 | /* This is our last resort if we couldn't find or create a BBT. Just | |
863 | pretend all blocks are good. */ | |
864 | return 0; | |
865 | } | |
866 | ||
867 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
868 | { | |
869 | struct nand_chip *this = mtd->priv; | |
870 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 871 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
872 | |
873 | /* Prime the ECC engine */ | |
cfa460ad | 874 | switch (mode) { |
932394ac WD |
875 | case NAND_ECC_READ: |
876 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
877 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
878 | break; | |
879 | case NAND_ECC_WRITE: | |
880 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
881 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
882 | break; | |
883 | } | |
884 | } | |
885 | ||
886 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
887 | { | |
888 | struct nand_chip *this = mtd->priv; | |
889 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 890 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
891 | |
892 | /* Prime the ECC engine */ | |
cfa460ad | 893 | switch (mode) { |
932394ac WD |
894 | case NAND_ECC_READ: |
895 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
896 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
897 | break; | |
898 | case NAND_ECC_WRITE: | |
899 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
900 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
901 | break; | |
902 | } | |
903 | } | |
904 | ||
905 | /* This code is only called on write */ | |
cfa460ad | 906 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
932394ac WD |
907 | { |
908 | struct nand_chip *this = mtd->priv; | |
909 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 910 | void __iomem *docptr = doc->virtadr; |
932394ac WD |
911 | int i; |
912 | int emptymatch = 1; | |
913 | ||
914 | /* flush the pipeline */ | |
915 | if (DoC_is_2000(doc)) { | |
916 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
917 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
918 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
919 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
920 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
921 | } else if (DoC_is_MillenniumPlus(doc)) { | |
922 | WriteDOC(0, docptr, Mplus_NOP); | |
923 | WriteDOC(0, docptr, Mplus_NOP); | |
924 | WriteDOC(0, docptr, Mplus_NOP); | |
925 | } else { | |
926 | WriteDOC(0, docptr, NOP); | |
927 | WriteDOC(0, docptr, NOP); | |
928 | WriteDOC(0, docptr, NOP); | |
929 | } | |
930 | ||
931 | for (i = 0; i < 6; i++) { | |
932 | if (DoC_is_MillenniumPlus(doc)) | |
933 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
ac7eb8a3 | 934 | else |
932394ac WD |
935 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
936 | if (ecc_code[i] != empty_write_ecc[i]) | |
937 | emptymatch = 0; | |
938 | } | |
939 | if (DoC_is_MillenniumPlus(doc)) | |
940 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
941 | else | |
942 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
943 | #if 0 | |
944 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
945 | if (emptymatch) { | |
946 | /* Note: this somewhat expensive test should not be triggered | |
947 | often. It could be optimized away by examining the data in | |
948 | the writebuf routine, and remembering the result. */ | |
949 | for (i = 0; i < 512; i++) { | |
cfa460ad WJ |
950 | if (dat[i] == 0xff) |
951 | continue; | |
932394ac WD |
952 | emptymatch = 0; |
953 | break; | |
954 | } | |
955 | } | |
956 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
957 | Return all-0xff ecc value instead of the computed one, so | |
958 | it'll look just like a freshly-erased page. */ | |
cfa460ad WJ |
959 | if (emptymatch) |
960 | memset(ecc_code, 0xff, 6); | |
932394ac WD |
961 | #endif |
962 | return 0; | |
963 | } | |
964 | ||
cfa460ad WJ |
965 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
966 | u_char *read_ecc, u_char *isnull) | |
932394ac WD |
967 | { |
968 | int i, ret = 0; | |
969 | struct nand_chip *this = mtd->priv; | |
970 | struct doc_priv *doc = this->priv; | |
ac7eb8a3 | 971 | void __iomem *docptr = doc->virtadr; |
cfa460ad | 972 | uint8_t calc_ecc[6]; |
932394ac WD |
973 | volatile u_char dummy; |
974 | int emptymatch = 1; | |
ac7eb8a3 | 975 | |
932394ac WD |
976 | /* flush the pipeline */ |
977 | if (DoC_is_2000(doc)) { | |
978 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
979 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
980 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
981 | } else if (DoC_is_MillenniumPlus(doc)) { | |
982 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
983 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
984 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
985 | } else { | |
986 | dummy = ReadDOC(docptr, ECCConf); | |
987 | dummy = ReadDOC(docptr, ECCConf); | |
988 | dummy = ReadDOC(docptr, ECCConf); | |
989 | } | |
ac7eb8a3 | 990 | |
932394ac WD |
991 | /* Error occured ? */ |
992 | if (dummy & 0x80) { | |
993 | for (i = 0; i < 6; i++) { | |
994 | if (DoC_is_MillenniumPlus(doc)) | |
995 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
996 | else | |
997 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
998 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
999 | emptymatch = 0; | |
1000 | } | |
1001 | /* If emptymatch=1, the read syndrome is consistent with an | |
1002 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1003 | if (emptymatch) { | |
1004 | for (i = 0; i < 6; i++) { | |
cfa460ad WJ |
1005 | if (read_ecc[i] == 0xff) |
1006 | continue; | |
932394ac WD |
1007 | emptymatch = 0; |
1008 | break; | |
1009 | } | |
1010 | } | |
1011 | /* If emptymatch still =1, check the data block. */ | |
1012 | if (emptymatch) { | |
cfa460ad WJ |
1013 | /* Note: this somewhat expensive test should not be triggered |
1014 | often. It could be optimized away by examining the data in | |
1015 | the readbuf routine, and remembering the result. */ | |
932394ac | 1016 | for (i = 0; i < 512; i++) { |
cfa460ad WJ |
1017 | if (dat[i] == 0xff) |
1018 | continue; | |
932394ac WD |
1019 | emptymatch = 0; |
1020 | break; | |
1021 | } | |
1022 | } | |
1023 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1024 | erased block, in which case the ECC will not come out right. | |
1025 | We'll suppress the error and tell the caller everything's | |
1026 | OK. Because it is. */ | |
cfa460ad WJ |
1027 | if (!emptymatch) |
1028 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
932394ac WD |
1029 | if (ret > 0) |
1030 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
ac7eb8a3 | 1031 | } |
932394ac WD |
1032 | if (DoC_is_MillenniumPlus(doc)) |
1033 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1034 | else | |
1035 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
c45912d8 | 1036 | if (no_ecc_failures && (ret == -EBADMSG)) { |
932394ac WD |
1037 | printk(KERN_ERR "suppressing ECC failure\n"); |
1038 | ret = 0; | |
1039 | } | |
1040 | return ret; | |
1041 | } | |
ac7eb8a3 | 1042 | |
5e1dae5c | 1043 | /*u_char mydatabuf[528]; */ |
cfa460ad WJ |
1044 | |
1045 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) | |
1046 | * attempt to retain compatibility. It used to read: | |
1047 | * .oobfree = { {8, 8} } | |
1048 | * Since that leaves two bytes unusable, it was changed. But the following | |
1049 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1050 | * .oobfree = { {6, 10} } | |
1051 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1052 | * safer. The only problem with it is that any code that parses oobfree must | |
1053 | * be able to handle out-of-order segments. | |
1054 | */ | |
1055 | static struct nand_ecclayout doc200x_oobinfo = { | |
ac7eb8a3 WD |
1056 | .eccbytes = 6, |
1057 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
cfa460ad | 1058 | .oobfree = {{8, 8}, {6, 2}} |
932394ac | 1059 | }; |
ac7eb8a3 | 1060 | |
932394ac WD |
1061 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
1062 | On sucessful return, buf will contain a copy of the media header for | |
1063 | further processing. id is the string to scan for, and will presumably be | |
1064 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1065 | header. The page #s of the found media headers are placed in mh0_page and | |
1066 | mh1_page in the DOC private structure. */ | |
cfa460ad | 1067 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
932394ac WD |
1068 | { |
1069 | struct nand_chip *this = mtd->priv; | |
1070 | struct doc_priv *doc = this->priv; | |
cfa460ad | 1071 | unsigned offs; |
932394ac WD |
1072 | int ret; |
1073 | size_t retlen; | |
1074 | ||
cfa460ad WJ |
1075 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
1076 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); | |
1077 | if (retlen != mtd->writesize) | |
1078 | continue; | |
932394ac | 1079 | if (ret) { |
cfa460ad | 1080 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
932394ac | 1081 | } |
cfa460ad WJ |
1082 | if (memcmp(buf, id, 6)) |
1083 | continue; | |
932394ac WD |
1084 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1085 | if (doc->mh0_page == -1) { | |
1086 | doc->mh0_page = offs >> this->page_shift; | |
cfa460ad WJ |
1087 | if (!findmirror) |
1088 | return 1; | |
932394ac WD |
1089 | continue; |
1090 | } | |
1091 | doc->mh1_page = offs >> this->page_shift; | |
1092 | return 2; | |
1093 | } | |
1094 | if (doc->mh0_page == -1) { | |
1095 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1096 | return 0; | |
1097 | } | |
1098 | /* Only one mediaheader was found. We want buf to contain a | |
1099 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1100 | offs = doc->mh0_page << this->page_shift; | |
cfa460ad WJ |
1101 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1102 | if (retlen != mtd->writesize) { | |
932394ac WD |
1103 | /* Insanity. Give up. */ |
1104 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1105 | return 0; | |
1106 | } | |
1107 | return 1; | |
1108 | } | |
1109 | ||
cfa460ad | 1110 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
932394ac WD |
1111 | { |
1112 | struct nand_chip *this = mtd->priv; | |
1113 | struct doc_priv *doc = this->priv; | |
1114 | int ret = 0; | |
1115 | u_char *buf; | |
1116 | struct NFTLMediaHeader *mh; | |
1117 | const unsigned psize = 1 << this->page_shift; | |
cfa460ad | 1118 | int numparts = 0; |
932394ac WD |
1119 | unsigned blocks, maxblocks; |
1120 | int offs, numheaders; | |
1121 | ||
cfa460ad | 1122 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
932394ac WD |
1123 | if (!buf) { |
1124 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1125 | return 0; | |
1126 | } | |
cfa460ad WJ |
1127 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1128 | goto out; | |
1129 | mh = (struct NFTLMediaHeader *)buf; | |
1130 | ||
c45912d8 SW |
1131 | le16_to_cpus(&mh->NumEraseUnits); |
1132 | le16_to_cpus(&mh->FirstPhysicalEUN); | |
1133 | le32_to_cpus(&mh->FormattedSize); | |
932394ac | 1134 | |
932394ac WD |
1135 | printk(KERN_INFO " DataOrgID = %s\n" |
1136 | " NumEraseUnits = %d\n" | |
1137 | " FirstPhysicalEUN = %d\n" | |
1138 | " FormattedSize = %d\n" | |
1139 | " UnitSizeFactor = %d\n", | |
1140 | mh->DataOrgID, mh->NumEraseUnits, | |
1141 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1142 | mh->UnitSizeFactor); | |
932394ac WD |
1143 | |
1144 | blocks = mtd->size >> this->phys_erase_shift; | |
1145 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1146 | ||
1147 | if (mh->UnitSizeFactor == 0x00) { | |
1148 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1149 | - There can be at most 32768 virtual blocks. | |
1150 | - There can be at most (virtual block size - page size) | |
cfa460ad WJ |
1151 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1152 | */ | |
932394ac WD |
1153 | mh->UnitSizeFactor = 0xff; |
1154 | while (blocks > maxblocks) { | |
1155 | blocks >>= 1; | |
1156 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1157 | mh->UnitSizeFactor--; | |
1158 | } | |
1159 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1160 | } | |
1161 | ||
1162 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1163 | layers; variables with have already been configured by nand_scan. | |
1164 | Unfortunately, we didn't know before this point what these values | |
1165 | should be. Thus, this code is somewhat dependant on the exact | |
1166 | implementation of the NAND layer. */ | |
1167 | if (mh->UnitSizeFactor != 0xff) { | |
1168 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1169 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1170 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1171 | blocks = mtd->size >> this->bbt_erase_shift; | |
1172 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1173 | } | |
1174 | ||
1175 | if (blocks > maxblocks) { | |
1176 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1177 | goto out; | |
1178 | } | |
1179 | ||
1180 | /* Skip past the media headers. */ | |
1181 | offs = max(doc->mh0_page, doc->mh1_page); | |
1182 | offs <<= this->page_shift; | |
1183 | offs += mtd->erasesize; | |
1184 | ||
cfa460ad WJ |
1185 | if (show_firmware_partition == 1) { |
1186 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1187 | parts[0].offset = 0; | |
1188 | parts[0].size = offs; | |
1189 | numparts = 1; | |
1190 | } | |
1191 | ||
1192 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1193 | parts[numparts].offset = offs; | |
1194 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
932394ac | 1195 | |
cfa460ad WJ |
1196 | offs += parts[numparts].size; |
1197 | numparts++; | |
932394ac | 1198 | |
932394ac | 1199 | if (offs < mtd->size) { |
cfa460ad WJ |
1200 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1201 | parts[numparts].offset = offs; | |
1202 | parts[numparts].size = mtd->size - offs; | |
1203 | numparts++; | |
932394ac | 1204 | } |
cfa460ad WJ |
1205 | |
1206 | ret = numparts; | |
1207 | out: | |
932394ac WD |
1208 | kfree(buf); |
1209 | return ret; | |
1210 | } | |
1211 | ||
1212 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
cfa460ad | 1213 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
932394ac WD |
1214 | { |
1215 | struct nand_chip *this = mtd->priv; | |
1216 | struct doc_priv *doc = this->priv; | |
1217 | int ret = 0; | |
1218 | u_char *buf; | |
1219 | struct INFTLMediaHeader *mh; | |
1220 | struct INFTLPartition *ip; | |
1221 | int numparts = 0; | |
1222 | int blocks; | |
1223 | int vshift, lastvunit = 0; | |
1224 | int i; | |
1225 | int end = mtd->size; | |
1226 | ||
1227 | if (inftl_bbt_write) | |
1228 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1229 | ||
cfa460ad | 1230 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
932394ac WD |
1231 | if (!buf) { |
1232 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1233 | return 0; | |
1234 | } | |
1235 | ||
cfa460ad WJ |
1236 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1237 | goto out; | |
932394ac | 1238 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
cfa460ad | 1239 | mh = (struct INFTLMediaHeader *)buf; |
932394ac | 1240 | |
c45912d8 SW |
1241 | le32_to_cpus(&mh->NoOfBootImageBlocks); |
1242 | le32_to_cpus(&mh->NoOfBinaryPartitions); | |
1243 | le32_to_cpus(&mh->NoOfBDTLPartitions); | |
1244 | le32_to_cpus(&mh->BlockMultiplierBits); | |
1245 | le32_to_cpus(&mh->FormatFlags); | |
1246 | le32_to_cpus(&mh->PercentUsed); | |
ac7eb8a3 | 1247 | |
932394ac WD |
1248 | printk(KERN_INFO " bootRecordID = %s\n" |
1249 | " NoOfBootImageBlocks = %d\n" | |
1250 | " NoOfBinaryPartitions = %d\n" | |
1251 | " NoOfBDTLPartitions = %d\n" | |
1252 | " BlockMultiplerBits = %d\n" | |
1253 | " FormatFlgs = %d\n" | |
1254 | " OsakVersion = %d.%d.%d.%d\n" | |
1255 | " PercentUsed = %d\n", | |
1256 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1257 | mh->NoOfBinaryPartitions, | |
1258 | mh->NoOfBDTLPartitions, | |
1259 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1260 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1261 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1262 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1263 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1264 | mh->PercentUsed); | |
932394ac WD |
1265 | |
1266 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1267 | ||
1268 | blocks = mtd->size >> vshift; | |
1269 | if (blocks > 32768) { | |
1270 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1271 | goto out; | |
1272 | } | |
1273 | ||
1274 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1275 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1276 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1277 | goto out; | |
1278 | } | |
1279 | ||
1280 | /* Scan the partitions */ | |
1281 | for (i = 0; (i < 4); i++) { | |
1282 | ip = &(mh->Partitions[i]); | |
c45912d8 SW |
1283 | le32_to_cpus(&ip->virtualUnits); |
1284 | le32_to_cpus(&ip->firstUnit); | |
1285 | le32_to_cpus(&ip->lastUnit); | |
1286 | le32_to_cpus(&ip->flags); | |
1287 | le32_to_cpus(&ip->spareUnits); | |
1288 | le32_to_cpus(&ip->Reserved0); | |
932394ac | 1289 | |
932394ac WD |
1290 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1291 | " virtualUnits = %d\n" | |
1292 | " firstUnit = %d\n" | |
1293 | " lastUnit = %d\n" | |
1294 | " flags = 0x%x\n" | |
1295 | " spareUnits = %d\n", | |
1296 | i, ip->virtualUnits, ip->firstUnit, | |
1297 | ip->lastUnit, ip->flags, | |
1298 | ip->spareUnits); | |
932394ac | 1299 | |
cfa460ad WJ |
1300 | if ((show_firmware_partition == 1) && |
1301 | (i == 0) && (ip->firstUnit > 0)) { | |
932394ac WD |
1302 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1303 | parts[0].offset = 0; | |
1304 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1305 | numparts = 1; | |
1306 | } | |
932394ac WD |
1307 | |
1308 | if (ip->flags & INFTL_BINARY) | |
1309 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1310 | else | |
1311 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1312 | parts[numparts].offset = ip->firstUnit << vshift; | |
1313 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1314 | numparts++; | |
cfa460ad WJ |
1315 | if (ip->lastUnit > lastvunit) |
1316 | lastvunit = ip->lastUnit; | |
1317 | if (ip->flags & INFTL_LAST) | |
1318 | break; | |
932394ac WD |
1319 | } |
1320 | lastvunit++; | |
1321 | if ((lastvunit << vshift) < end) { | |
1322 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1323 | parts[numparts].offset = lastvunit << vshift; | |
1324 | parts[numparts].size = end - parts[numparts].offset; | |
1325 | numparts++; | |
1326 | } | |
1327 | ret = numparts; | |
cfa460ad | 1328 | out: |
932394ac WD |
1329 | kfree(buf); |
1330 | return ret; | |
1331 | } | |
1332 | ||
1333 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1334 | { | |
1335 | int ret, numparts; | |
1336 | struct nand_chip *this = mtd->priv; | |
1337 | struct doc_priv *doc = this->priv; | |
1338 | struct mtd_partition parts[2]; | |
1339 | ||
cfa460ad | 1340 | memset((char *)parts, 0, sizeof(parts)); |
932394ac WD |
1341 | /* On NFTL, we have to find the media headers before we can read the |
1342 | BBTs, since they're stored in the media header eraseblocks. */ | |
1343 | numparts = nftl_partscan(mtd, parts); | |
cfa460ad WJ |
1344 | if (!numparts) |
1345 | return -EIO; | |
932394ac WD |
1346 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1347 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1348 | NAND_BBT_VERSION; | |
1349 | this->bbt_td->veroffs = 7; | |
1350 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1351 | if (doc->mh1_page != -1) { | |
1352 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1353 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1354 | NAND_BBT_VERSION; | |
1355 | this->bbt_md->veroffs = 7; | |
1356 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1357 | } else { | |
1358 | this->bbt_md = NULL; | |
1359 | } | |
1360 | ||
1361 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1362 | At least as nand_bbt.c is currently written. */ | |
1363 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1364 | return ret; | |
1365 | add_mtd_device(mtd); | |
1366 | #ifdef CONFIG_MTD_PARTITIONS | |
1367 | if (!no_autopart) | |
1368 | add_mtd_partitions(mtd, parts, numparts); | |
1369 | #endif | |
1370 | return 0; | |
1371 | } | |
1372 | ||
1373 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1374 | { | |
1375 | int ret, numparts; | |
1376 | struct nand_chip *this = mtd->priv; | |
1377 | struct doc_priv *doc = this->priv; | |
1378 | struct mtd_partition parts[5]; | |
1379 | ||
1380 | if (this->numchips > doc->chips_per_floor) { | |
1381 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1382 | return -EIO; | |
1383 | } | |
1384 | ||
1385 | if (DoC_is_MillenniumPlus(doc)) { | |
1386 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1387 | if (inftl_bbt_write) | |
1388 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1389 | this->bbt_td->pages[0] = 2; | |
1390 | this->bbt_md = NULL; | |
1391 | } else { | |
cfa460ad | 1392 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
932394ac WD |
1393 | if (inftl_bbt_write) |
1394 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1395 | this->bbt_td->offs = 8; | |
1396 | this->bbt_td->len = 8; | |
1397 | this->bbt_td->veroffs = 7; | |
1398 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1399 | this->bbt_td->reserved_block_code = 0x01; | |
1400 | this->bbt_td->pattern = "MSYS_BBT"; | |
1401 | ||
cfa460ad | 1402 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
932394ac WD |
1403 | if (inftl_bbt_write) |
1404 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1405 | this->bbt_md->offs = 8; | |
1406 | this->bbt_md->len = 8; | |
1407 | this->bbt_md->veroffs = 7; | |
1408 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1409 | this->bbt_md->reserved_block_code = 0x01; | |
1410 | this->bbt_md->pattern = "TBB_SYSM"; | |
1411 | } | |
1412 | ||
1413 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1414 | At least as nand_bbt.c is currently written. */ | |
1415 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1416 | return ret; | |
cfa460ad | 1417 | memset((char *)parts, 0, sizeof(parts)); |
932394ac WD |
1418 | numparts = inftl_partscan(mtd, parts); |
1419 | /* At least for now, require the INFTL Media Header. We could probably | |
1420 | do without it for non-INFTL use, since all it gives us is | |
1421 | autopartitioning, but I want to give it more thought. */ | |
cfa460ad WJ |
1422 | if (!numparts) |
1423 | return -EIO; | |
932394ac WD |
1424 | add_mtd_device(mtd); |
1425 | #ifdef CONFIG_MTD_PARTITIONS | |
1426 | if (!no_autopart) | |
1427 | add_mtd_partitions(mtd, parts, numparts); | |
1428 | #endif | |
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1433 | { | |
1434 | struct nand_chip *this = mtd->priv; | |
1435 | struct doc_priv *doc = this->priv; | |
1436 | ||
932394ac WD |
1437 | this->read_byte = doc2000_read_byte; |
1438 | this->write_buf = doc2000_writebuf; | |
1439 | this->read_buf = doc2000_readbuf; | |
1440 | this->verify_buf = doc2000_verifybuf; | |
1441 | this->scan_bbt = nftl_scan_bbt; | |
1442 | ||
1443 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1444 | doc2000_count_chips(mtd); | |
1445 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1446 | return (4 * doc->chips_per_floor); | |
1447 | } | |
1448 | ||
1449 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1450 | { | |
1451 | struct nand_chip *this = mtd->priv; | |
1452 | struct doc_priv *doc = this->priv; | |
1453 | ||
932394ac WD |
1454 | this->read_byte = doc2001_read_byte; |
1455 | this->write_buf = doc2001_writebuf; | |
1456 | this->read_buf = doc2001_readbuf; | |
1457 | this->verify_buf = doc2001_verifybuf; | |
1458 | ||
1459 | ReadDOC(doc->virtadr, ChipID); | |
1460 | ReadDOC(doc->virtadr, ChipID); | |
1461 | ReadDOC(doc->virtadr, ChipID); | |
1462 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1463 | /* It's not a Millennium; it's one of the newer | |
ac7eb8a3 | 1464 | DiskOnChip 2000 units with a similar ASIC. |
932394ac WD |
1465 | Treat it like a Millennium, except that it |
1466 | can have multiple chips. */ | |
1467 | doc2000_count_chips(mtd); | |
1468 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1469 | this->scan_bbt = inftl_scan_bbt; | |
1470 | return (4 * doc->chips_per_floor); | |
1471 | } else { | |
1472 | /* Bog-standard Millennium */ | |
1473 | doc->chips_per_floor = 1; | |
1474 | mtd->name = "DiskOnChip Millennium"; | |
1475 | this->scan_bbt = nftl_scan_bbt; | |
1476 | return 1; | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1481 | { | |
1482 | struct nand_chip *this = mtd->priv; | |
1483 | struct doc_priv *doc = this->priv; | |
1484 | ||
932394ac WD |
1485 | this->read_byte = doc2001plus_read_byte; |
1486 | this->write_buf = doc2001plus_writebuf; | |
1487 | this->read_buf = doc2001plus_readbuf; | |
1488 | this->verify_buf = doc2001plus_verifybuf; | |
1489 | this->scan_bbt = inftl_scan_bbt; | |
cfa460ad | 1490 | this->cmd_ctrl = NULL; |
932394ac WD |
1491 | this->select_chip = doc2001plus_select_chip; |
1492 | this->cmdfunc = doc2001plus_command; | |
cfa460ad | 1493 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
932394ac WD |
1494 | |
1495 | doc->chips_per_floor = 1; | |
1496 | mtd->name = "DiskOnChip Millennium Plus"; | |
1497 | ||
1498 | return 1; | |
1499 | } | |
1500 | ||
cfa460ad | 1501 | static int __init doc_probe(unsigned long physadr) |
932394ac WD |
1502 | { |
1503 | unsigned char ChipID; | |
1504 | struct mtd_info *mtd; | |
1505 | struct nand_chip *nand; | |
1506 | struct doc_priv *doc; | |
1507 | void __iomem *virtadr; | |
1508 | unsigned char save_control; | |
1509 | unsigned char tmp, tmpb, tmpc; | |
1510 | int reg, len, numchips; | |
1511 | int ret = 0; | |
1512 | ||
1513 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1514 | if (!virtadr) { | |
1515 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1516 | return -EIO; | |
1517 | } | |
1518 | ||
1519 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1520 | * bootup procedure will put the device into reset mode, and | |
1521 | * it's not possible to talk to it without actually writing | |
1522 | * to the DOCControl register. So we store the current contents | |
1523 | * of the DOCControl register's location, in case we later decide | |
1524 | * that it's not a DiskOnChip, and want to put it back how we | |
ac7eb8a3 | 1525 | * found it. |
932394ac WD |
1526 | */ |
1527 | save_control = ReadDOC(virtadr, DOCControl); | |
1528 | ||
1529 | /* Reset the DiskOnChip ASIC */ | |
cfa460ad WJ |
1530 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1531 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
932394ac WD |
1532 | |
1533 | /* Enable the DiskOnChip ASIC */ | |
cfa460ad WJ |
1534 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1535 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
932394ac WD |
1536 | |
1537 | ChipID = ReadDOC(virtadr, ChipID); | |
1538 | ||
cfa460ad | 1539 | switch (ChipID) { |
932394ac WD |
1540 | case DOC_ChipID_Doc2k: |
1541 | reg = DoC_2k_ECCStatus; | |
1542 | break; | |
1543 | case DOC_ChipID_DocMil: | |
1544 | reg = DoC_ECCConf; | |
1545 | break; | |
1546 | case DOC_ChipID_DocMilPlus16: | |
1547 | case DOC_ChipID_DocMilPlus32: | |
1548 | case 0: | |
1549 | /* Possible Millennium Plus, need to do more checks */ | |
1550 | /* Possibly release from power down mode */ | |
1551 | for (tmp = 0; (tmp < 4); tmp++) | |
1552 | ReadDOC(virtadr, Mplus_Power); | |
1553 | ||
1554 | /* Reset the Millennium Plus ASIC */ | |
cfa460ad | 1555 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
932394ac WD |
1556 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1557 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1558 | ||
1559 | mdelay(1); | |
1560 | /* Enable the Millennium Plus ASIC */ | |
cfa460ad | 1561 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
932394ac WD |
1562 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1563 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1564 | mdelay(1); | |
1565 | ||
1566 | ChipID = ReadDOC(virtadr, ChipID); | |
1567 | ||
1568 | switch (ChipID) { | |
1569 | case DOC_ChipID_DocMilPlus16: | |
1570 | reg = DoC_Mplus_Toggle; | |
1571 | break; | |
1572 | case DOC_ChipID_DocMilPlus32: | |
1573 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1574 | default: | |
1575 | ret = -ENODEV; | |
1576 | goto notfound; | |
1577 | } | |
1578 | break; | |
1579 | ||
1580 | default: | |
1581 | ret = -ENODEV; | |
1582 | goto notfound; | |
1583 | } | |
1584 | /* Check the TOGGLE bit in the ECC register */ | |
cfa460ad | 1585 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
932394ac WD |
1586 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1587 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1588 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1589 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1590 | ret = -ENODEV; | |
1591 | goto notfound; | |
1592 | } | |
1593 | ||
1594 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1595 | unsigned char oldval; | |
1596 | unsigned char newval; | |
1597 | nand = mtd->priv; | |
1598 | doc = nand->priv; | |
1599 | /* Use the alias resolution register to determine if this is | |
1600 | in fact the same DOC aliased to a new address. If writes | |
1601 | to one chip's alias resolution register change the value on | |
1602 | the other chip, they're the same chip. */ | |
1603 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1604 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1605 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1606 | } else { | |
1607 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1608 | newval = ReadDOC(virtadr, AliasResolution); | |
1609 | } | |
1610 | if (oldval != newval) | |
1611 | continue; | |
1612 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1613 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1614 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
5e1dae5c | 1615 | WriteDOC(newval, virtadr, Mplus_AliasResolution); /* restore it */ |
932394ac WD |
1616 | } else { |
1617 | WriteDOC(~newval, virtadr, AliasResolution); | |
1618 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
5e1dae5c | 1619 | WriteDOC(newval, virtadr, AliasResolution); /* restore it */ |
932394ac WD |
1620 | } |
1621 | newval = ~newval; | |
1622 | if (oldval == newval) { | |
1623 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1624 | goto notfound; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1629 | ||
1630 | len = sizeof(struct mtd_info) + | |
cfa460ad WJ |
1631 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
1632 | mtd = kzalloc(len, GFP_KERNEL); | |
932394ac WD |
1633 | if (!mtd) { |
1634 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1635 | ret = -ENOMEM; | |
1636 | goto fail; | |
1637 | } | |
932394ac WD |
1638 | |
1639 | nand = (struct nand_chip *) (mtd + 1); | |
1640 | doc = (struct doc_priv *) (nand + 1); | |
1641 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1642 | nand->bbt_md = nand->bbt_td + 1; | |
1643 | ||
1644 | mtd->priv = nand; | |
1645 | mtd->owner = THIS_MODULE; | |
1646 | ||
1647 | nand->priv = doc; | |
1648 | nand->select_chip = doc200x_select_chip; | |
cfa460ad | 1649 | nand->cmd_ctrl = doc200x_hwcontrol; |
932394ac WD |
1650 | nand->dev_ready = doc200x_dev_ready; |
1651 | nand->waitfunc = doc200x_wait; | |
1652 | nand->block_bad = doc200x_block_bad; | |
cfa460ad WJ |
1653 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1654 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1655 | nand->ecc.correct = doc200x_correct_data; | |
932394ac | 1656 | |
cfa460ad WJ |
1657 | nand->ecc.layout = &doc200x_oobinfo; |
1658 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; | |
1659 | nand->ecc.size = 512; | |
1660 | nand->ecc.bytes = 6; | |
1661 | nand->options = NAND_USE_FLASH_BBT; | |
932394ac WD |
1662 | |
1663 | doc->physadr = physadr; | |
1664 | doc->virtadr = virtadr; | |
1665 | doc->ChipID = ChipID; | |
1666 | doc->curfloor = -1; | |
1667 | doc->curchip = -1; | |
1668 | doc->mh0_page = -1; | |
1669 | doc->mh1_page = -1; | |
1670 | doc->nextdoc = doclist; | |
1671 | ||
1672 | if (ChipID == DOC_ChipID_Doc2k) | |
1673 | numchips = doc2000_init(mtd); | |
1674 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1675 | numchips = doc2001plus_init(mtd); | |
1676 | else | |
1677 | numchips = doc2001_init(mtd); | |
1678 | ||
1679 | if ((ret = nand_scan(mtd, numchips))) { | |
1680 | /* DBB note: i believe nand_release is necessary here, as | |
1681 | buffers may have been allocated in nand_base. Check with | |
1682 | Thomas. FIX ME! */ | |
1683 | /* nand_release will call del_mtd_device, but we haven't yet | |
1684 | added it. This is handled without incident by | |
1685 | del_mtd_device, as far as I can tell. */ | |
1686 | nand_release(mtd); | |
1687 | kfree(mtd); | |
1688 | goto fail; | |
1689 | } | |
1690 | ||
1691 | /* Success! */ | |
1692 | doclist = mtd; | |
1693 | return 0; | |
1694 | ||
cfa460ad | 1695 | notfound: |
932394ac WD |
1696 | /* Put back the contents of the DOCControl register, in case it's not |
1697 | actually a DiskOnChip. */ | |
1698 | WriteDOC(save_control, virtadr, DOCControl); | |
cfa460ad | 1699 | fail: |
932394ac WD |
1700 | iounmap(virtadr); |
1701 | return ret; | |
1702 | } | |
1703 | ||
1704 | static void release_nanddoc(void) | |
1705 | { | |
53677ef1 | 1706 | struct mtd_info *mtd, *nextmtd; |
932394ac WD |
1707 | struct nand_chip *nand; |
1708 | struct doc_priv *doc; | |
1709 | ||
1710 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1711 | nand = mtd->priv; | |
1712 | doc = nand->priv; | |
1713 | ||
1714 | nextmtd = doc->nextdoc; | |
1715 | nand_release(mtd); | |
1716 | iounmap(doc->virtadr); | |
1717 | kfree(mtd); | |
1718 | } | |
1719 | } | |
1720 | ||
1721 | static int __init init_nanddoc(void) | |
1722 | { | |
1723 | int i, ret = 0; | |
1724 | ||
1725 | /* We could create the decoder on demand, if memory is a concern. | |
ac7eb8a3 | 1726 | * This way we have it handy, if an error happens |
932394ac WD |
1727 | * |
1728 | * Symbolsize is 10 (bits) | |
1729 | * Primitve polynomial is x^10+x^3+1 | |
1730 | * first consecutive root is 510 | |
1731 | * primitve element to generate roots = 1 | |
1732 | * generator polinomial degree = 4 | |
1733 | */ | |
1734 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
53677ef1 | 1735 | if (!rs_decoder) { |
cfa460ad | 1736 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); |
932394ac WD |
1737 | return -ENOMEM; |
1738 | } | |
1739 | ||
1740 | if (doc_config_location) { | |
1741 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1742 | ret = doc_probe(doc_config_location); | |
1743 | if (ret < 0) | |
1744 | goto outerr; | |
1745 | } else { | |
cfa460ad | 1746 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
932394ac WD |
1747 | doc_probe(doc_locations[i]); |
1748 | } | |
1749 | } | |
1750 | /* No banner message any more. Print a message if no DiskOnChip | |
1751 | found, so the user knows we at least tried. */ | |
1752 | if (!doclist) { | |
1753 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1754 | ret = -ENODEV; | |
1755 | goto outerr; | |
1756 | } | |
1757 | return 0; | |
cfa460ad | 1758 | outerr: |
932394ac WD |
1759 | free_rs(rs_decoder); |
1760 | return ret; | |
1761 | } | |
1762 | ||
1763 | static void __exit cleanup_nanddoc(void) | |
1764 | { | |
1765 | /* Cleanup the nand/DoC resources */ | |
1766 | release_nanddoc(); | |
1767 | ||
1768 | /* Free the reed solomon resources */ | |
1769 | if (rs_decoder) { | |
1770 | free_rs(rs_decoder); | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | module_init(init_nanddoc); | |
1775 | module_exit(cleanup_nanddoc); | |
1776 | ||
1777 | MODULE_LICENSE("GPL"); | |
1778 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1779 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); |