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Commit | Line | Data |
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61b03bd7 | 1 | /* |
1da177e4 LT |
2 | * drivers/mtd/nand/diskonchip.c |
3 | * | |
4 | * (C) 2003 Red Hat, Inc. | |
5 | * (C) 2004 Dan Brown <dan_brown@ieee.org> | |
6 | * (C) 2004 Kalev Lember <kalev@smartlink.ee> | |
7 | * | |
8 | * Author: David Woodhouse <dwmw2@infradead.org> | |
9 | * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org> | |
10 | * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee> | |
61b03bd7 | 11 | * |
1da177e4 | 12 | * Error correction code lifted from the old docecc code |
61b03bd7 | 13 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) |
1da177e4 LT |
14 | * Copyright (C) 2000 Netgem S.A. |
15 | * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de> | |
61b03bd7 | 16 | * |
1da177e4 | 17 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
1da177e4 LT |
18 | */ |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/rslib.h> | |
25 | #include <linux/moduleparam.h> | |
26 | #include <asm/io.h> | |
27 | ||
28 | #include <linux/mtd/mtd.h> | |
29 | #include <linux/mtd/nand.h> | |
30 | #include <linux/mtd/doc2000.h> | |
31 | #include <linux/mtd/compatmac.h> | |
32 | #include <linux/mtd/partitions.h> | |
33 | #include <linux/mtd/inftl.h> | |
34 | ||
35 | /* Where to look for the devices? */ | |
651078ba TG |
36 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
37 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
1da177e4 LT |
38 | #endif |
39 | ||
40 | static unsigned long __initdata doc_locations[] = { | |
41 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) | |
651078ba | 42 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
61b03bd7 | 43 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
1da177e4 | 44 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
61b03bd7 TG |
45 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
46 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
1da177e4 LT |
47 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
48 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ | |
61b03bd7 | 49 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
1da177e4 | 50 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
61b03bd7 TG |
51 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
52 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
1da177e4 LT |
53 | 0xe8000, 0xea000, 0xec000, 0xee000, |
54 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ | |
e0c7d767 | 55 | #else |
1da177e4 LT |
56 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
57 | #endif | |
58 | 0xffffffff }; | |
59 | ||
60 | static struct mtd_info *doclist = NULL; | |
61 | ||
62 | struct doc_priv { | |
63 | void __iomem *virtadr; | |
64 | unsigned long physadr; | |
65 | u_char ChipID; | |
66 | u_char CDSNControl; | |
e0c7d767 | 67 | int chips_per_floor; /* The number of chips detected on each floor */ |
1da177e4 LT |
68 | int curfloor; |
69 | int curchip; | |
70 | int mh0_page; | |
71 | int mh1_page; | |
72 | struct mtd_info *nextdoc; | |
73 | }; | |
74 | ||
1da177e4 LT |
75 | /* This is the syndrome computed by the HW ecc generator upon reading an empty |
76 | page, one with all 0xff for data and stored ecc code. */ | |
77 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
e0c7d767 | 78 | |
1da177e4 LT |
79 | /* This is the ecc value computed by the HW ecc generator upon writing an empty |
80 | page, one with all 0xff for data. */ | |
81 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
82 | ||
83 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
84 | ||
85 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
86 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
87 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
88 | ||
7abd3ef9 TG |
89 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
90 | unsigned int bitmask); | |
1da177e4 LT |
91 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
92 | ||
e0c7d767 | 93 | static int debug = 0; |
1da177e4 LT |
94 | module_param(debug, int, 0); |
95 | ||
e0c7d767 | 96 | static int try_dword = 1; |
1da177e4 LT |
97 | module_param(try_dword, int, 0); |
98 | ||
e0c7d767 | 99 | static int no_ecc_failures = 0; |
1da177e4 LT |
100 | module_param(no_ecc_failures, int, 0); |
101 | ||
e0c7d767 | 102 | static int no_autopart = 0; |
1da177e4 | 103 | module_param(no_autopart, int, 0); |
1a78ff6b | 104 | |
e0c7d767 | 105 | static int show_firmware_partition = 0; |
1a78ff6b | 106 | module_param(show_firmware_partition, int, 0); |
1da177e4 | 107 | |
89e2bf61 | 108 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE |
e0c7d767 | 109 | static int inftl_bbt_write = 1; |
1da177e4 | 110 | #else |
e0c7d767 | 111 | static int inftl_bbt_write = 0; |
1da177e4 LT |
112 | #endif |
113 | module_param(inftl_bbt_write, int, 0); | |
114 | ||
651078ba | 115 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
116 | module_param(doc_config_location, ulong, 0); |
117 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
118 | ||
1da177e4 LT |
119 | /* Sector size for HW ECC */ |
120 | #define SECTOR_SIZE 512 | |
121 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
122 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
123 | /* Number of roots */ | |
124 | #define NROOTS 4 | |
125 | /* First consective root */ | |
126 | #define FCR 510 | |
127 | /* Number of symbols */ | |
128 | #define NN 1023 | |
129 | ||
130 | /* the Reed Solomon control structure */ | |
131 | static struct rs_control *rs_decoder; | |
132 | ||
61b03bd7 | 133 | /* |
1da177e4 LT |
134 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
135 | * which we must convert to a standard syndrom usable by the generic | |
136 | * Reed-Solomon library code. | |
137 | * | |
138 | * Fabrice Bellard figured this out in the old docecc code. I added | |
139 | * some comments, improved a minor bit and converted it to make use | |
140 | * of the generic Reed-Solomon libary. tglx | |
141 | */ | |
e0c7d767 | 142 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
143 | { |
144 | int i, j, nerr, errpos[8]; | |
145 | uint8_t parity; | |
146 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
147 | ||
148 | /* Convert the ecc bytes into words */ | |
149 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
150 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
151 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
152 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
153 | parity = ecc[1]; | |
154 | ||
155 | /* Initialize the syndrom buffer */ | |
156 | for (i = 0; i < NROOTS; i++) | |
157 | s[i] = ds[0]; | |
61b03bd7 TG |
158 | /* |
159 | * Evaluate | |
1da177e4 LT |
160 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
161 | * where x = alpha^(FCR + i) | |
162 | */ | |
e0c7d767 DW |
163 | for (j = 1; j < NROOTS; j++) { |
164 | if (ds[j] == 0) | |
1da177e4 LT |
165 | continue; |
166 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 167 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
168 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
169 | } | |
170 | ||
171 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
172 | for (i = 0; i < NROOTS; i++) { | |
173 | if (syn[i]) | |
e0c7d767 | 174 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
175 | } |
176 | /* Call the decoder library */ | |
177 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
178 | ||
179 | /* Incorrectable errors ? */ | |
180 | if (nerr < 0) | |
181 | return nerr; | |
182 | ||
61b03bd7 | 183 | /* |
1da177e4 LT |
184 | * Correct the errors. The bitpositions are a bit of magic, |
185 | * but they are given by the design of the de/encoder circuit | |
186 | * in the DoC ASIC's. | |
187 | */ | |
e0c7d767 | 188 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
189 | int index, bitpos, pos = 1015 - errpos[i]; |
190 | uint8_t val; | |
191 | if (pos >= NB_DATA && pos < 1019) | |
192 | continue; | |
193 | if (pos < NB_DATA) { | |
194 | /* extract bit position (MSB first) */ | |
195 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
196 | /* now correct the following 10 bits. At most two bytes | |
197 | can be modified since pos is even */ | |
198 | index = (pos >> 3) ^ 1; | |
199 | bitpos = pos & 7; | |
e0c7d767 | 200 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
201 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
202 | parity ^= val; | |
203 | if (index < SECTOR_SIZE) | |
204 | data[index] ^= val; | |
205 | } | |
206 | index = ((pos >> 3) + 1) ^ 1; | |
207 | bitpos = (bitpos + 10) & 7; | |
208 | if (bitpos == 0) | |
209 | bitpos = 8; | |
e0c7d767 DW |
210 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
211 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
212 | parity ^= val; |
213 | if (index < SECTOR_SIZE) | |
214 | data[index] ^= val; | |
215 | } | |
216 | } | |
217 | } | |
218 | /* If the parity is wrong, no rescue possible */ | |
eb684507 | 219 | return parity ? -EBADMSG : nerr; |
1da177e4 LT |
220 | } |
221 | ||
222 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
223 | { | |
224 | volatile char dummy; | |
225 | int i; | |
61b03bd7 | 226 | |
1da177e4 LT |
227 | for (i = 0; i < cycles; i++) { |
228 | if (DoC_is_Millennium(doc)) | |
229 | dummy = ReadDOC(doc->virtadr, NOP); | |
230 | else if (DoC_is_MillenniumPlus(doc)) | |
231 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
232 | else | |
233 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
234 | } | |
61b03bd7 | 235 | |
1da177e4 LT |
236 | } |
237 | ||
238 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
239 | ||
240 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
241 | static int _DoC_WaitReady(struct doc_priv *doc) | |
242 | { | |
e0c7d767 | 243 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
244 | unsigned long timeo = jiffies + (HZ * 10); |
245 | ||
e0c7d767 DW |
246 | if (debug) |
247 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
248 | /* Out-of-line routine to wait for chip response */ |
249 | if (DoC_is_MillenniumPlus(doc)) { | |
250 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
251 | if (time_after(jiffies, timeo)) { | |
252 | printk("_DoC_WaitReady timed out.\n"); | |
253 | return -EIO; | |
254 | } | |
255 | udelay(1); | |
256 | cond_resched(); | |
257 | } | |
258 | } else { | |
259 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
260 | if (time_after(jiffies, timeo)) { | |
261 | printk("_DoC_WaitReady timed out.\n"); | |
262 | return -EIO; | |
263 | } | |
264 | udelay(1); | |
265 | cond_resched(); | |
266 | } | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
272 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
273 | { | |
e0c7d767 | 274 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
275 | int ret = 0; |
276 | ||
277 | if (DoC_is_MillenniumPlus(doc)) { | |
278 | DoC_Delay(doc, 4); | |
279 | ||
280 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
281 | /* Call the out-of-line routine to wait */ | |
282 | ret = _DoC_WaitReady(doc); | |
283 | } else { | |
284 | DoC_Delay(doc, 4); | |
285 | ||
286 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
287 | /* Call the out-of-line routine to wait */ | |
288 | ret = _DoC_WaitReady(doc); | |
289 | DoC_Delay(doc, 2); | |
290 | } | |
291 | ||
e0c7d767 DW |
292 | if (debug) |
293 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
294 | return ret; |
295 | } | |
296 | ||
297 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
298 | { | |
299 | struct nand_chip *this = mtd->priv; | |
300 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 301 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 302 | |
e0c7d767 DW |
303 | if (debug) |
304 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
305 | WriteDOC(datum, docptr, CDSNSlowIO); |
306 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
307 | } | |
308 | ||
309 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
310 | { | |
311 | struct nand_chip *this = mtd->priv; | |
312 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 313 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
314 | u_char ret; |
315 | ||
316 | ReadDOC(docptr, CDSNSlowIO); | |
317 | DoC_Delay(doc, 2); | |
318 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
319 | if (debug) |
320 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
321 | return ret; |
322 | } | |
323 | ||
e0c7d767 | 324 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
325 | { |
326 | struct nand_chip *this = mtd->priv; | |
327 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 328 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 329 | int i; |
e0c7d767 DW |
330 | if (debug) |
331 | printk("writebuf of %d bytes: ", len); | |
332 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
333 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
334 | if (debug && i < 16) | |
335 | printk("%02x ", buf[i]); | |
336 | } | |
e0c7d767 DW |
337 | if (debug) |
338 | printk("\n"); | |
1da177e4 LT |
339 | } |
340 | ||
e0c7d767 | 341 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
342 | { |
343 | struct nand_chip *this = mtd->priv; | |
344 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
345 | void __iomem *docptr = doc->virtadr; |
346 | int i; | |
1da177e4 | 347 | |
e0c7d767 DW |
348 | if (debug) |
349 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 350 | |
e0c7d767 | 351 | for (i = 0; i < len; i++) { |
1da177e4 LT |
352 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
353 | } | |
354 | } | |
355 | ||
e0c7d767 | 356 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
357 | { |
358 | struct nand_chip *this = mtd->priv; | |
359 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
360 | void __iomem *docptr = doc->virtadr; |
361 | int i; | |
1da177e4 | 362 | |
e0c7d767 DW |
363 | if (debug) |
364 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 365 | |
e0c7d767 DW |
366 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
367 | for (i = 0; i < len; i++) { | |
368 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 LT |
369 | } |
370 | } else { | |
e0c7d767 DW |
371 | for (i = 0; i < len; i += 4) { |
372 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
373 | } |
374 | } | |
375 | } | |
376 | ||
e0c7d767 | 377 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
378 | { |
379 | struct nand_chip *this = mtd->priv; | |
380 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 381 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
382 | int i; |
383 | ||
e0c7d767 | 384 | for (i = 0; i < len; i++) |
1da177e4 LT |
385 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
386 | return -EFAULT; | |
387 | return 0; | |
388 | } | |
389 | ||
390 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
391 | { | |
392 | struct nand_chip *this = mtd->priv; | |
393 | struct doc_priv *doc = this->priv; | |
394 | uint16_t ret; | |
395 | ||
396 | doc200x_select_chip(mtd, nr); | |
7abd3ef9 TG |
397 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
398 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
399 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
400 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 401 | |
dfd61294 | 402 | /* We cant' use dev_ready here, but at least we wait for the |
61b03bd7 | 403 | * command to complete |
dfd61294 TG |
404 | */ |
405 | udelay(50); | |
61b03bd7 | 406 | |
1da177e4 LT |
407 | ret = this->read_byte(mtd) << 8; |
408 | ret |= this->read_byte(mtd); | |
409 | ||
410 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
411 | /* First chip probe. See if we get same results by 32-bit access */ | |
412 | union { | |
413 | uint32_t dword; | |
414 | uint8_t byte[4]; | |
415 | } ident; | |
416 | void __iomem *docptr = doc->virtadr; | |
417 | ||
7abd3ef9 TG |
418 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
419 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
420 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
421 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
422 | NAND_NCE | NAND_CTRL_CHANGE); | |
1da177e4 | 423 | |
dfd61294 TG |
424 | udelay(50); |
425 | ||
1da177e4 LT |
426 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
427 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
428 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
429 | this->read_buf = &doc2000_readbuf_dword; | |
430 | } | |
431 | } | |
61b03bd7 | 432 | |
1da177e4 LT |
433 | return ret; |
434 | } | |
435 | ||
436 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
437 | { | |
438 | struct nand_chip *this = mtd->priv; | |
439 | struct doc_priv *doc = this->priv; | |
440 | uint16_t mfrid; | |
441 | int i; | |
442 | ||
443 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
444 | doc->chips_per_floor = 4; | |
445 | ||
446 | /* Find out what the first chip is */ | |
447 | mfrid = doc200x_ident_chip(mtd, 0); | |
448 | ||
449 | /* Find how many chips in each floor. */ | |
450 | for (i = 1; i < 4; i++) { | |
451 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
452 | break; | |
453 | } | |
454 | doc->chips_per_floor = i; | |
455 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
456 | } | |
457 | ||
7bc3312b | 458 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 LT |
459 | { |
460 | struct doc_priv *doc = this->priv; | |
461 | ||
462 | int status; | |
61b03bd7 | 463 | |
1da177e4 LT |
464 | DoC_WaitReady(doc); |
465 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
466 | DoC_WaitReady(doc); | |
467 | status = (int)this->read_byte(mtd); | |
468 | ||
469 | return status; | |
470 | } | |
471 | ||
472 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
473 | { | |
474 | struct nand_chip *this = mtd->priv; | |
475 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 476 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
477 | |
478 | WriteDOC(datum, docptr, CDSNSlowIO); | |
479 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
480 | WriteDOC(datum, docptr, WritePipeTerm); | |
481 | } | |
482 | ||
483 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
484 | { | |
485 | struct nand_chip *this = mtd->priv; | |
486 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 487 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
488 | |
489 | //ReadDOC(docptr, CDSNSlowIO); | |
490 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
491 | DoC_Delay(doc, 2); | |
492 | ReadDOC(docptr, ReadPipeInit); | |
493 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
494 | return ReadDOC(docptr, LastDataRead); | |
495 | } | |
496 | ||
e0c7d767 | 497 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
498 | { |
499 | struct nand_chip *this = mtd->priv; | |
500 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 501 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
502 | int i; |
503 | ||
e0c7d767 | 504 | for (i = 0; i < len; i++) |
1da177e4 LT |
505 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
506 | /* Terminate write pipeline */ | |
507 | WriteDOC(0x00, docptr, WritePipeTerm); | |
508 | } | |
509 | ||
e0c7d767 | 510 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
511 | { |
512 | struct nand_chip *this = mtd->priv; | |
513 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 514 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
515 | int i; |
516 | ||
517 | /* Start read pipeline */ | |
518 | ReadDOC(docptr, ReadPipeInit); | |
519 | ||
e0c7d767 | 520 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
521 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
522 | ||
523 | /* Terminate read pipeline */ | |
524 | buf[i] = ReadDOC(docptr, LastDataRead); | |
525 | } | |
526 | ||
e0c7d767 | 527 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
528 | { |
529 | struct nand_chip *this = mtd->priv; | |
530 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 531 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
532 | int i; |
533 | ||
534 | /* Start read pipeline */ | |
535 | ReadDOC(docptr, ReadPipeInit); | |
536 | ||
e0c7d767 | 537 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
538 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
539 | ReadDOC(docptr, LastDataRead); | |
540 | return i; | |
541 | } | |
542 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
543 | return i; | |
544 | return 0; | |
545 | } | |
546 | ||
547 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
548 | { | |
549 | struct nand_chip *this = mtd->priv; | |
550 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 551 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
552 | u_char ret; |
553 | ||
e0c7d767 DW |
554 | ReadDOC(docptr, Mplus_ReadPipeInit); |
555 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
556 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
557 | if (debug) | |
558 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
559 | return ret; |
560 | } | |
561 | ||
e0c7d767 | 562 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
563 | { |
564 | struct nand_chip *this = mtd->priv; | |
565 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 566 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
567 | int i; |
568 | ||
e0c7d767 DW |
569 | if (debug) |
570 | printk("writebuf of %d bytes: ", len); | |
571 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
572 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
573 | if (debug && i < 16) | |
574 | printk("%02x ", buf[i]); | |
575 | } | |
e0c7d767 DW |
576 | if (debug) |
577 | printk("\n"); | |
1da177e4 LT |
578 | } |
579 | ||
e0c7d767 | 580 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
581 | { |
582 | struct nand_chip *this = mtd->priv; | |
583 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 584 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
585 | int i; |
586 | ||
e0c7d767 DW |
587 | if (debug) |
588 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
589 | |
590 | /* Start read pipeline */ | |
591 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
592 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
593 | ||
e0c7d767 | 594 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
595 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
596 | if (debug && i < 16) | |
597 | printk("%02x ", buf[i]); | |
598 | } | |
599 | ||
600 | /* Terminate read pipeline */ | |
e0c7d767 | 601 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 602 | if (debug && i < 16) |
e0c7d767 DW |
603 | printk("%02x ", buf[len - 2]); |
604 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 605 | if (debug && i < 16) |
e0c7d767 DW |
606 | printk("%02x ", buf[len - 1]); |
607 | if (debug) | |
608 | printk("\n"); | |
1da177e4 LT |
609 | } |
610 | ||
e0c7d767 | 611 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
612 | { |
613 | struct nand_chip *this = mtd->priv; | |
614 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 615 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
616 | int i; |
617 | ||
e0c7d767 DW |
618 | if (debug) |
619 | printk("verifybuf of %d bytes: ", len); | |
1da177e4 LT |
620 | |
621 | /* Start read pipeline */ | |
622 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
623 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
624 | ||
e0c7d767 | 625 | for (i = 0; i < len - 2; i++) |
1da177e4 LT |
626 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
627 | ReadDOC(docptr, Mplus_LastDataRead); | |
628 | ReadDOC(docptr, Mplus_LastDataRead); | |
629 | return i; | |
630 | } | |
e0c7d767 DW |
631 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
632 | return len - 2; | |
633 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
634 | return len - 1; | |
1da177e4 LT |
635 | return 0; |
636 | } | |
637 | ||
638 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
639 | { | |
640 | struct nand_chip *this = mtd->priv; | |
641 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 642 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
643 | int floor = 0; |
644 | ||
e0c7d767 DW |
645 | if (debug) |
646 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
647 | |
648 | if (chip == -1) { | |
649 | /* Disable flash internally */ | |
650 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
651 | return; | |
652 | } | |
653 | ||
654 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 655 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
656 | |
657 | /* Assert ChipEnable and deassert WriteProtect */ | |
658 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
659 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
660 | ||
661 | doc->curchip = chip; | |
662 | doc->curfloor = floor; | |
663 | } | |
664 | ||
665 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
666 | { | |
667 | struct nand_chip *this = mtd->priv; | |
668 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 669 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
670 | int floor = 0; |
671 | ||
e0c7d767 DW |
672 | if (debug) |
673 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
674 | |
675 | if (chip == -1) | |
676 | return; | |
677 | ||
678 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 679 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
680 | |
681 | /* 11.4.4 -- deassert CE before changing chip */ | |
7abd3ef9 | 682 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
683 | |
684 | WriteDOC(floor, docptr, FloorSelect); | |
685 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
686 | ||
7abd3ef9 | 687 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
688 | |
689 | doc->curchip = chip; | |
690 | doc->curfloor = floor; | |
691 | } | |
692 | ||
7abd3ef9 TG |
693 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
694 | ||
695 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
696 | unsigned int ctrl) | |
1da177e4 LT |
697 | { |
698 | struct nand_chip *this = mtd->priv; | |
699 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 700 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 701 | |
7abd3ef9 TG |
702 | if (ctrl & NAND_CTRL_CHANGE) { |
703 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
704 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
705 | if (debug) | |
706 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
707 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
708 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
709 | DoC_Delay(doc, 4); | |
1da177e4 | 710 | } |
cad74f2c TG |
711 | if (cmd != NAND_CMD_NONE) { |
712 | if (DoC_is_2000(doc)) | |
713 | doc2000_write_byte(mtd, cmd); | |
714 | else | |
715 | doc2001_write_byte(mtd, cmd); | |
716 | } | |
1da177e4 LT |
717 | } |
718 | ||
e0c7d767 | 719 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
720 | { |
721 | struct nand_chip *this = mtd->priv; | |
722 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 723 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
724 | |
725 | /* | |
726 | * Must terminate write pipeline before sending any commands | |
727 | * to the device. | |
728 | */ | |
729 | if (command == NAND_CMD_PAGEPROG) { | |
730 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
731 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
732 | } | |
733 | ||
734 | /* | |
735 | * Write out the command to the device. | |
736 | */ | |
737 | if (command == NAND_CMD_SEQIN) { | |
738 | int readcmd; | |
739 | ||
28318776 | 740 | if (column >= mtd->writesize) { |
1da177e4 | 741 | /* OOB area */ |
28318776 | 742 | column -= mtd->writesize; |
1da177e4 LT |
743 | readcmd = NAND_CMD_READOOB; |
744 | } else if (column < 256) { | |
745 | /* First 256 bytes --> READ0 */ | |
746 | readcmd = NAND_CMD_READ0; | |
747 | } else { | |
748 | column -= 256; | |
749 | readcmd = NAND_CMD_READ1; | |
750 | } | |
751 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
752 | } | |
753 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
754 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
755 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
756 | ||
757 | if (column != -1 || page_addr != -1) { | |
758 | /* Serially input address */ | |
759 | if (column != -1) { | |
760 | /* Adjust columns for 16 bit buswidth */ | |
761 | if (this->options & NAND_BUSWIDTH_16) | |
762 | column >>= 1; | |
763 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
764 | } | |
765 | if (page_addr != -1) { | |
e0c7d767 DW |
766 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
767 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
768 | /* One more address cycle for higher density devices */ |
769 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 770 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
771 | printk("high density\n"); |
772 | } | |
773 | } | |
774 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
775 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
776 | /* deassert ALE */ | |
e0c7d767 DW |
777 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
778 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
779 | WriteDOC(0, docptr, Mplus_FlashControl); |
780 | } | |
781 | ||
61b03bd7 | 782 | /* |
1da177e4 LT |
783 | * program and erase have their own busy handlers |
784 | * status and sequential in needs no delay | |
e0c7d767 | 785 | */ |
1da177e4 LT |
786 | switch (command) { |
787 | ||
788 | case NAND_CMD_PAGEPROG: | |
789 | case NAND_CMD_ERASE1: | |
790 | case NAND_CMD_ERASE2: | |
791 | case NAND_CMD_SEQIN: | |
792 | case NAND_CMD_STATUS: | |
793 | return; | |
794 | ||
795 | case NAND_CMD_RESET: | |
796 | if (this->dev_ready) | |
797 | break; | |
798 | udelay(this->chip_delay); | |
799 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
800 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
801 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 802 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
803 | return; |
804 | ||
e0c7d767 | 805 | /* This applies to read commands */ |
1da177e4 | 806 | default: |
61b03bd7 | 807 | /* |
1da177e4 LT |
808 | * If we don't have access to the busy pin, we apply the given |
809 | * command delay | |
e0c7d767 | 810 | */ |
1da177e4 | 811 | if (!this->dev_ready) { |
e0c7d767 | 812 | udelay(this->chip_delay); |
1da177e4 LT |
813 | return; |
814 | } | |
815 | } | |
816 | ||
817 | /* Apply this short delay always to ensure that we do wait tWB in | |
818 | * any case on any machine. */ | |
e0c7d767 | 819 | ndelay(100); |
1da177e4 | 820 | /* wait until command is processed */ |
e0c7d767 | 821 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
822 | } |
823 | ||
824 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
825 | { | |
826 | struct nand_chip *this = mtd->priv; | |
827 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 828 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
829 | |
830 | if (DoC_is_MillenniumPlus(doc)) { | |
831 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
832 | DoC_Delay(doc, 4); | |
833 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 834 | if (debug) |
1da177e4 LT |
835 | printk("not ready\n"); |
836 | return 0; | |
837 | } | |
e0c7d767 DW |
838 | if (debug) |
839 | printk("was ready\n"); | |
1da177e4 LT |
840 | return 1; |
841 | } else { | |
842 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
843 | DoC_Delay(doc, 4); | |
844 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 845 | if (debug) |
1da177e4 LT |
846 | printk("not ready\n"); |
847 | return 0; | |
848 | } | |
849 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
850 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
851 | if (debug) |
852 | printk("was ready\n"); | |
1da177e4 LT |
853 | return 1; |
854 | } | |
855 | } | |
856 | ||
857 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
858 | { | |
859 | /* This is our last resort if we couldn't find or create a BBT. Just | |
860 | pretend all blocks are good. */ | |
861 | return 0; | |
862 | } | |
863 | ||
864 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
865 | { | |
866 | struct nand_chip *this = mtd->priv; | |
867 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 868 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
869 | |
870 | /* Prime the ECC engine */ | |
e0c7d767 | 871 | switch (mode) { |
1da177e4 LT |
872 | case NAND_ECC_READ: |
873 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
874 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
875 | break; | |
876 | case NAND_ECC_WRITE: | |
877 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
878 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
879 | break; | |
880 | } | |
881 | } | |
882 | ||
883 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
884 | { | |
885 | struct nand_chip *this = mtd->priv; | |
886 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 887 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
888 | |
889 | /* Prime the ECC engine */ | |
e0c7d767 | 890 | switch (mode) { |
1da177e4 LT |
891 | case NAND_ECC_READ: |
892 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
893 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
894 | break; | |
895 | case NAND_ECC_WRITE: | |
896 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
897 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
898 | break; | |
899 | } | |
900 | } | |
901 | ||
902 | /* This code is only called on write */ | |
e0c7d767 | 903 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 LT |
904 | { |
905 | struct nand_chip *this = mtd->priv; | |
906 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 907 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
908 | int i; |
909 | int emptymatch = 1; | |
910 | ||
911 | /* flush the pipeline */ | |
912 | if (DoC_is_2000(doc)) { | |
913 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
914 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
915 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
916 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
917 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
918 | } else if (DoC_is_MillenniumPlus(doc)) { | |
919 | WriteDOC(0, docptr, Mplus_NOP); | |
920 | WriteDOC(0, docptr, Mplus_NOP); | |
921 | WriteDOC(0, docptr, Mplus_NOP); | |
922 | } else { | |
923 | WriteDOC(0, docptr, NOP); | |
924 | WriteDOC(0, docptr, NOP); | |
925 | WriteDOC(0, docptr, NOP); | |
926 | } | |
927 | ||
928 | for (i = 0; i < 6; i++) { | |
929 | if (DoC_is_MillenniumPlus(doc)) | |
930 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 931 | else |
1da177e4 LT |
932 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
933 | if (ecc_code[i] != empty_write_ecc[i]) | |
934 | emptymatch = 0; | |
935 | } | |
936 | if (DoC_is_MillenniumPlus(doc)) | |
937 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
938 | else | |
939 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
940 | #if 0 | |
941 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
942 | if (emptymatch) { | |
943 | /* Note: this somewhat expensive test should not be triggered | |
944 | often. It could be optimized away by examining the data in | |
945 | the writebuf routine, and remembering the result. */ | |
946 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
947 | if (dat[i] == 0xff) |
948 | continue; | |
1da177e4 LT |
949 | emptymatch = 0; |
950 | break; | |
951 | } | |
952 | } | |
953 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
954 | Return all-0xff ecc value instead of the computed one, so | |
955 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
956 | if (emptymatch) |
957 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
958 | #endif |
959 | return 0; | |
960 | } | |
961 | ||
f5bbdacc TG |
962 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
963 | u_char *read_ecc, u_char *isnull) | |
1da177e4 LT |
964 | { |
965 | int i, ret = 0; | |
966 | struct nand_chip *this = mtd->priv; | |
967 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 968 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 969 | uint8_t calc_ecc[6]; |
1da177e4 LT |
970 | volatile u_char dummy; |
971 | int emptymatch = 1; | |
61b03bd7 | 972 | |
1da177e4 LT |
973 | /* flush the pipeline */ |
974 | if (DoC_is_2000(doc)) { | |
975 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
976 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
977 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
978 | } else if (DoC_is_MillenniumPlus(doc)) { | |
979 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
980 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
981 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
982 | } else { | |
983 | dummy = ReadDOC(docptr, ECCConf); | |
984 | dummy = ReadDOC(docptr, ECCConf); | |
985 | dummy = ReadDOC(docptr, ECCConf); | |
986 | } | |
61b03bd7 | 987 | |
1da177e4 LT |
988 | /* Error occured ? */ |
989 | if (dummy & 0x80) { | |
990 | for (i = 0; i < 6; i++) { | |
991 | if (DoC_is_MillenniumPlus(doc)) | |
992 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
993 | else | |
994 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
995 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
996 | emptymatch = 0; | |
997 | } | |
998 | /* If emptymatch=1, the read syndrome is consistent with an | |
999 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1000 | if (emptymatch) { | |
1001 | for (i = 0; i < 6; i++) { | |
e0c7d767 DW |
1002 | if (read_ecc[i] == 0xff) |
1003 | continue; | |
1da177e4 LT |
1004 | emptymatch = 0; |
1005 | break; | |
1006 | } | |
1007 | } | |
1008 | /* If emptymatch still =1, check the data block. */ | |
1009 | if (emptymatch) { | |
e0c7d767 DW |
1010 | /* Note: this somewhat expensive test should not be triggered |
1011 | often. It could be optimized away by examining the data in | |
1012 | the readbuf routine, and remembering the result. */ | |
1da177e4 | 1013 | for (i = 0; i < 512; i++) { |
e0c7d767 DW |
1014 | if (dat[i] == 0xff) |
1015 | continue; | |
1da177e4 LT |
1016 | emptymatch = 0; |
1017 | break; | |
1018 | } | |
1019 | } | |
1020 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1021 | erased block, in which case the ECC will not come out right. | |
1022 | We'll suppress the error and tell the caller everything's | |
1023 | OK. Because it is. */ | |
e0c7d767 DW |
1024 | if (!emptymatch) |
1025 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
1026 | if (ret > 0) |
1027 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 1028 | } |
1da177e4 LT |
1029 | if (DoC_is_MillenniumPlus(doc)) |
1030 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1031 | else | |
1032 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
eb684507 | 1033 | if (no_ecc_failures && (ret == -EBADMSG)) { |
1da177e4 LT |
1034 | printk(KERN_ERR "suppressing ECC failure\n"); |
1035 | ret = 0; | |
1036 | } | |
1037 | return ret; | |
1038 | } | |
61b03bd7 | 1039 | |
1da177e4 LT |
1040 | //u_char mydatabuf[528]; |
1041 | ||
abc37e67 DB |
1042 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
1043 | * attempt to retain compatibility. It used to read: | |
1044 | * .oobfree = { {8, 8} } | |
1045 | * Since that leaves two bytes unusable, it was changed. But the following | |
1046 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1047 | * .oobfree = { {6, 10} } | |
1048 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1049 | * safer. The only problem with it is that any code that parses oobfree must | |
1050 | * be able to handle out-of-order segments. | |
1051 | */ | |
5bd34c09 | 1052 | static struct nand_ecclayout doc200x_oobinfo = { |
e0c7d767 DW |
1053 | .eccbytes = 6, |
1054 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
1055 | .oobfree = {{8, 8}, {6, 2}} | |
1da177e4 | 1056 | }; |
61b03bd7 | 1057 | |
1da177e4 LT |
1058 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
1059 | On sucessful return, buf will contain a copy of the media header for | |
1060 | further processing. id is the string to scan for, and will presumably be | |
1061 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1062 | header. The page #s of the found media headers are placed in mh0_page and | |
1063 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1064 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 LT |
1065 | { |
1066 | struct nand_chip *this = mtd->priv; | |
1067 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1068 | unsigned offs; |
1da177e4 LT |
1069 | int ret; |
1070 | size_t retlen; | |
1071 | ||
1a78ff6b | 1072 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
28318776 JE |
1073 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1074 | if (retlen != mtd->writesize) | |
e0c7d767 | 1075 | continue; |
1da177e4 | 1076 | if (ret) { |
e0c7d767 | 1077 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1078 | } |
e0c7d767 DW |
1079 | if (memcmp(buf, id, 6)) |
1080 | continue; | |
1da177e4 LT |
1081 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1082 | if (doc->mh0_page == -1) { | |
1083 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1084 | if (!findmirror) |
1085 | return 1; | |
1da177e4 LT |
1086 | continue; |
1087 | } | |
1088 | doc->mh1_page = offs >> this->page_shift; | |
1089 | return 2; | |
1090 | } | |
1091 | if (doc->mh0_page == -1) { | |
1092 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1093 | return 0; | |
1094 | } | |
1095 | /* Only one mediaheader was found. We want buf to contain a | |
1096 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1097 | offs = doc->mh0_page << this->page_shift; | |
28318776 JE |
1098 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1099 | if (retlen != mtd->writesize) { | |
1da177e4 LT |
1100 | /* Insanity. Give up. */ |
1101 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1102 | return 0; | |
1103 | } | |
1104 | return 1; | |
1105 | } | |
1106 | ||
e0c7d767 | 1107 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1108 | { |
1109 | struct nand_chip *this = mtd->priv; | |
1110 | struct doc_priv *doc = this->priv; | |
1111 | int ret = 0; | |
1112 | u_char *buf; | |
1113 | struct NFTLMediaHeader *mh; | |
1114 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1115 | int numparts = 0; |
1da177e4 LT |
1116 | unsigned blocks, maxblocks; |
1117 | int offs, numheaders; | |
1118 | ||
28318776 | 1119 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1120 | if (!buf) { |
1121 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1122 | return 0; | |
1123 | } | |
e0c7d767 DW |
1124 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1125 | goto out; | |
1126 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1127 | |
96372446 HH |
1128 | le16_to_cpus(&mh->NumEraseUnits); |
1129 | le16_to_cpus(&mh->FirstPhysicalEUN); | |
1130 | le32_to_cpus(&mh->FormattedSize); | |
f29a4b86 | 1131 | |
1da177e4 LT |
1132 | printk(KERN_INFO " DataOrgID = %s\n" |
1133 | " NumEraseUnits = %d\n" | |
1134 | " FirstPhysicalEUN = %d\n" | |
1135 | " FormattedSize = %d\n" | |
1136 | " UnitSizeFactor = %d\n", | |
1137 | mh->DataOrgID, mh->NumEraseUnits, | |
1138 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1139 | mh->UnitSizeFactor); | |
1da177e4 LT |
1140 | |
1141 | blocks = mtd->size >> this->phys_erase_shift; | |
1142 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1143 | ||
1144 | if (mh->UnitSizeFactor == 0x00) { | |
1145 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1146 | - There can be at most 32768 virtual blocks. | |
1147 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1148 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1149 | */ | |
1da177e4 LT |
1150 | mh->UnitSizeFactor = 0xff; |
1151 | while (blocks > maxblocks) { | |
1152 | blocks >>= 1; | |
1153 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1154 | mh->UnitSizeFactor--; | |
1155 | } | |
1156 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1157 | } | |
1158 | ||
1159 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1160 | layers; variables with have already been configured by nand_scan. | |
1161 | Unfortunately, we didn't know before this point what these values | |
1162 | should be. Thus, this code is somewhat dependant on the exact | |
1163 | implementation of the NAND layer. */ | |
1164 | if (mh->UnitSizeFactor != 0xff) { | |
1165 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1166 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1167 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1168 | blocks = mtd->size >> this->bbt_erase_shift; | |
1169 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1170 | } | |
1171 | ||
1172 | if (blocks > maxblocks) { | |
1173 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1174 | goto out; | |
1175 | } | |
1176 | ||
1177 | /* Skip past the media headers. */ | |
1178 | offs = max(doc->mh0_page, doc->mh1_page); | |
1179 | offs <<= this->page_shift; | |
1180 | offs += mtd->erasesize; | |
1181 | ||
1a78ff6b DB |
1182 | if (show_firmware_partition == 1) { |
1183 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1184 | parts[0].offset = 0; | |
1185 | parts[0].size = offs; | |
1186 | numparts = 1; | |
1187 | } | |
1188 | ||
1189 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1190 | parts[numparts].offset = offs; | |
1191 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1192 | ||
1193 | offs += parts[numparts].size; | |
1194 | numparts++; | |
1da177e4 | 1195 | |
1da177e4 | 1196 | if (offs < mtd->size) { |
1a78ff6b DB |
1197 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1198 | parts[numparts].offset = offs; | |
1199 | parts[numparts].size = mtd->size - offs; | |
1200 | numparts++; | |
1da177e4 | 1201 | } |
1a78ff6b DB |
1202 | |
1203 | ret = numparts; | |
e0c7d767 | 1204 | out: |
1da177e4 LT |
1205 | kfree(buf); |
1206 | return ret; | |
1207 | } | |
1208 | ||
1209 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1210 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1211 | { |
1212 | struct nand_chip *this = mtd->priv; | |
1213 | struct doc_priv *doc = this->priv; | |
1214 | int ret = 0; | |
1215 | u_char *buf; | |
1216 | struct INFTLMediaHeader *mh; | |
1217 | struct INFTLPartition *ip; | |
1218 | int numparts = 0; | |
1219 | int blocks; | |
1220 | int vshift, lastvunit = 0; | |
1221 | int i; | |
1222 | int end = mtd->size; | |
1223 | ||
1224 | if (inftl_bbt_write) | |
1225 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1226 | ||
28318776 | 1227 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1228 | if (!buf) { |
1229 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
e0c7d767 DW |
1233 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1234 | goto out; | |
1da177e4 | 1235 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1236 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 | 1237 | |
96372446 HH |
1238 | le32_to_cpus(&mh->NoOfBootImageBlocks); |
1239 | le32_to_cpus(&mh->NoOfBinaryPartitions); | |
1240 | le32_to_cpus(&mh->NoOfBDTLPartitions); | |
1241 | le32_to_cpus(&mh->BlockMultiplierBits); | |
1242 | le32_to_cpus(&mh->FormatFlags); | |
1243 | le32_to_cpus(&mh->PercentUsed); | |
61b03bd7 | 1244 | |
1da177e4 LT |
1245 | printk(KERN_INFO " bootRecordID = %s\n" |
1246 | " NoOfBootImageBlocks = %d\n" | |
1247 | " NoOfBinaryPartitions = %d\n" | |
1248 | " NoOfBDTLPartitions = %d\n" | |
1249 | " BlockMultiplerBits = %d\n" | |
1250 | " FormatFlgs = %d\n" | |
1251 | " OsakVersion = %d.%d.%d.%d\n" | |
1252 | " PercentUsed = %d\n", | |
1253 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1254 | mh->NoOfBinaryPartitions, | |
1255 | mh->NoOfBDTLPartitions, | |
1256 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1257 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1258 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1259 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1260 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1261 | mh->PercentUsed); | |
1da177e4 LT |
1262 | |
1263 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1264 | ||
1265 | blocks = mtd->size >> vshift; | |
1266 | if (blocks > 32768) { | |
1267 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1268 | goto out; | |
1269 | } | |
1270 | ||
1271 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1272 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1273 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1274 | goto out; | |
1275 | } | |
1276 | ||
1277 | /* Scan the partitions */ | |
1278 | for (i = 0; (i < 4); i++) { | |
1279 | ip = &(mh->Partitions[i]); | |
96372446 HH |
1280 | le32_to_cpus(&ip->virtualUnits); |
1281 | le32_to_cpus(&ip->firstUnit); | |
1282 | le32_to_cpus(&ip->lastUnit); | |
1283 | le32_to_cpus(&ip->flags); | |
1284 | le32_to_cpus(&ip->spareUnits); | |
1285 | le32_to_cpus(&ip->Reserved0); | |
1da177e4 | 1286 | |
1da177e4 LT |
1287 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1288 | " virtualUnits = %d\n" | |
1289 | " firstUnit = %d\n" | |
1290 | " lastUnit = %d\n" | |
1291 | " flags = 0x%x\n" | |
1292 | " spareUnits = %d\n", | |
1293 | i, ip->virtualUnits, ip->firstUnit, | |
1294 | ip->lastUnit, ip->flags, | |
1295 | ip->spareUnits); | |
1da177e4 | 1296 | |
1a78ff6b DB |
1297 | if ((show_firmware_partition == 1) && |
1298 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1299 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1300 | parts[0].offset = 0; | |
1301 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1302 | numparts = 1; | |
1303 | } | |
1da177e4 LT |
1304 | |
1305 | if (ip->flags & INFTL_BINARY) | |
1306 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1307 | else | |
1308 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1309 | parts[numparts].offset = ip->firstUnit << vshift; | |
1310 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1311 | numparts++; | |
e0c7d767 DW |
1312 | if (ip->lastUnit > lastvunit) |
1313 | lastvunit = ip->lastUnit; | |
1314 | if (ip->flags & INFTL_LAST) | |
1315 | break; | |
1da177e4 LT |
1316 | } |
1317 | lastvunit++; | |
1318 | if ((lastvunit << vshift) < end) { | |
1319 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1320 | parts[numparts].offset = lastvunit << vshift; | |
1321 | parts[numparts].size = end - parts[numparts].offset; | |
1322 | numparts++; | |
1323 | } | |
1324 | ret = numparts; | |
e0c7d767 | 1325 | out: |
1da177e4 LT |
1326 | kfree(buf); |
1327 | return ret; | |
1328 | } | |
1329 | ||
1330 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1331 | { | |
1332 | int ret, numparts; | |
1333 | struct nand_chip *this = mtd->priv; | |
1334 | struct doc_priv *doc = this->priv; | |
1335 | struct mtd_partition parts[2]; | |
1336 | ||
e0c7d767 | 1337 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1338 | /* On NFTL, we have to find the media headers before we can read the |
1339 | BBTs, since they're stored in the media header eraseblocks. */ | |
1340 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1341 | if (!numparts) |
1342 | return -EIO; | |
1da177e4 LT |
1343 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1344 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1345 | NAND_BBT_VERSION; | |
1346 | this->bbt_td->veroffs = 7; | |
1347 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1348 | if (doc->mh1_page != -1) { | |
1349 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1350 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1351 | NAND_BBT_VERSION; | |
1352 | this->bbt_md->veroffs = 7; | |
1353 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1354 | } else { | |
1355 | this->bbt_md = NULL; | |
1356 | } | |
1357 | ||
1358 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1359 | At least as nand_bbt.c is currently written. */ | |
1360 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1361 | return ret; | |
1362 | add_mtd_device(mtd); | |
1363 | #ifdef CONFIG_MTD_PARTITIONS | |
1364 | if (!no_autopart) | |
1365 | add_mtd_partitions(mtd, parts, numparts); | |
1366 | #endif | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1371 | { | |
1372 | int ret, numparts; | |
1373 | struct nand_chip *this = mtd->priv; | |
1374 | struct doc_priv *doc = this->priv; | |
1375 | struct mtd_partition parts[5]; | |
1376 | ||
1377 | if (this->numchips > doc->chips_per_floor) { | |
1378 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1379 | return -EIO; | |
1380 | } | |
1381 | ||
1382 | if (DoC_is_MillenniumPlus(doc)) { | |
1383 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1384 | if (inftl_bbt_write) | |
1385 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1386 | this->bbt_td->pages[0] = 2; | |
1387 | this->bbt_md = NULL; | |
1388 | } else { | |
e0c7d767 | 1389 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1390 | if (inftl_bbt_write) |
1391 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1392 | this->bbt_td->offs = 8; | |
1393 | this->bbt_td->len = 8; | |
1394 | this->bbt_td->veroffs = 7; | |
1395 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1396 | this->bbt_td->reserved_block_code = 0x01; | |
1397 | this->bbt_td->pattern = "MSYS_BBT"; | |
1398 | ||
e0c7d767 | 1399 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1400 | if (inftl_bbt_write) |
1401 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1402 | this->bbt_md->offs = 8; | |
1403 | this->bbt_md->len = 8; | |
1404 | this->bbt_md->veroffs = 7; | |
1405 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1406 | this->bbt_md->reserved_block_code = 0x01; | |
1407 | this->bbt_md->pattern = "TBB_SYSM"; | |
1408 | } | |
1409 | ||
1410 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1411 | At least as nand_bbt.c is currently written. */ | |
1412 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1413 | return ret; | |
e0c7d767 | 1414 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1415 | numparts = inftl_partscan(mtd, parts); |
1416 | /* At least for now, require the INFTL Media Header. We could probably | |
1417 | do without it for non-INFTL use, since all it gives us is | |
1418 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1419 | if (!numparts) |
1420 | return -EIO; | |
1da177e4 LT |
1421 | add_mtd_device(mtd); |
1422 | #ifdef CONFIG_MTD_PARTITIONS | |
1423 | if (!no_autopart) | |
1424 | add_mtd_partitions(mtd, parts, numparts); | |
1425 | #endif | |
1426 | return 0; | |
1427 | } | |
1428 | ||
1429 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1430 | { | |
1431 | struct nand_chip *this = mtd->priv; | |
1432 | struct doc_priv *doc = this->priv; | |
1433 | ||
1da177e4 LT |
1434 | this->read_byte = doc2000_read_byte; |
1435 | this->write_buf = doc2000_writebuf; | |
1436 | this->read_buf = doc2000_readbuf; | |
1437 | this->verify_buf = doc2000_verifybuf; | |
1438 | this->scan_bbt = nftl_scan_bbt; | |
1439 | ||
1440 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1441 | doc2000_count_chips(mtd); | |
1442 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1443 | return (4 * doc->chips_per_floor); | |
1444 | } | |
1445 | ||
1446 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1447 | { | |
1448 | struct nand_chip *this = mtd->priv; | |
1449 | struct doc_priv *doc = this->priv; | |
1450 | ||
1da177e4 LT |
1451 | this->read_byte = doc2001_read_byte; |
1452 | this->write_buf = doc2001_writebuf; | |
1453 | this->read_buf = doc2001_readbuf; | |
1454 | this->verify_buf = doc2001_verifybuf; | |
1455 | ||
1456 | ReadDOC(doc->virtadr, ChipID); | |
1457 | ReadDOC(doc->virtadr, ChipID); | |
1458 | ReadDOC(doc->virtadr, ChipID); | |
1459 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1460 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1461 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1462 | Treat it like a Millennium, except that it |
1463 | can have multiple chips. */ | |
1464 | doc2000_count_chips(mtd); | |
1465 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1466 | this->scan_bbt = inftl_scan_bbt; | |
1467 | return (4 * doc->chips_per_floor); | |
1468 | } else { | |
1469 | /* Bog-standard Millennium */ | |
1470 | doc->chips_per_floor = 1; | |
1471 | mtd->name = "DiskOnChip Millennium"; | |
1472 | this->scan_bbt = nftl_scan_bbt; | |
1473 | return 1; | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1478 | { | |
1479 | struct nand_chip *this = mtd->priv; | |
1480 | struct doc_priv *doc = this->priv; | |
1481 | ||
1da177e4 LT |
1482 | this->read_byte = doc2001plus_read_byte; |
1483 | this->write_buf = doc2001plus_writebuf; | |
1484 | this->read_buf = doc2001plus_readbuf; | |
1485 | this->verify_buf = doc2001plus_verifybuf; | |
1486 | this->scan_bbt = inftl_scan_bbt; | |
7abd3ef9 | 1487 | this->cmd_ctrl = NULL; |
1da177e4 LT |
1488 | this->select_chip = doc2001plus_select_chip; |
1489 | this->cmdfunc = doc2001plus_command; | |
0cddd6c2 | 1490 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1491 | |
1492 | doc->chips_per_floor = 1; | |
1493 | mtd->name = "DiskOnChip Millennium Plus"; | |
1494 | ||
1495 | return 1; | |
1496 | } | |
1497 | ||
858119e1 | 1498 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1499 | { |
1500 | unsigned char ChipID; | |
1501 | struct mtd_info *mtd; | |
1502 | struct nand_chip *nand; | |
1503 | struct doc_priv *doc; | |
1504 | void __iomem *virtadr; | |
1505 | unsigned char save_control; | |
1506 | unsigned char tmp, tmpb, tmpc; | |
1507 | int reg, len, numchips; | |
1508 | int ret = 0; | |
1509 | ||
1510 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1511 | if (!virtadr) { | |
1512 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1513 | return -EIO; | |
1514 | } | |
1515 | ||
1516 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1517 | * bootup procedure will put the device into reset mode, and | |
1518 | * it's not possible to talk to it without actually writing | |
1519 | * to the DOCControl register. So we store the current contents | |
1520 | * of the DOCControl register's location, in case we later decide | |
1521 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1522 | * found it. |
1da177e4 LT |
1523 | */ |
1524 | save_control = ReadDOC(virtadr, DOCControl); | |
1525 | ||
1526 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1527 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1528 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1529 | |
1530 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1531 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1532 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1533 | |
1534 | ChipID = ReadDOC(virtadr, ChipID); | |
1535 | ||
e0c7d767 | 1536 | switch (ChipID) { |
1da177e4 LT |
1537 | case DOC_ChipID_Doc2k: |
1538 | reg = DoC_2k_ECCStatus; | |
1539 | break; | |
1540 | case DOC_ChipID_DocMil: | |
1541 | reg = DoC_ECCConf; | |
1542 | break; | |
1543 | case DOC_ChipID_DocMilPlus16: | |
1544 | case DOC_ChipID_DocMilPlus32: | |
1545 | case 0: | |
1546 | /* Possible Millennium Plus, need to do more checks */ | |
1547 | /* Possibly release from power down mode */ | |
1548 | for (tmp = 0; (tmp < 4); tmp++) | |
1549 | ReadDOC(virtadr, Mplus_Power); | |
1550 | ||
1551 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1552 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1553 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1554 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1555 | ||
1556 | mdelay(1); | |
1557 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1558 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1559 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1560 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1561 | mdelay(1); | |
1562 | ||
1563 | ChipID = ReadDOC(virtadr, ChipID); | |
1564 | ||
1565 | switch (ChipID) { | |
1566 | case DOC_ChipID_DocMilPlus16: | |
1567 | reg = DoC_Mplus_Toggle; | |
1568 | break; | |
1569 | case DOC_ChipID_DocMilPlus32: | |
1570 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1571 | default: | |
1572 | ret = -ENODEV; | |
1573 | goto notfound; | |
1574 | } | |
1575 | break; | |
1576 | ||
1577 | default: | |
1578 | ret = -ENODEV; | |
1579 | goto notfound; | |
1580 | } | |
1581 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1582 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1583 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1584 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1585 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1586 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1587 | ret = -ENODEV; | |
1588 | goto notfound; | |
1589 | } | |
1590 | ||
1591 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1592 | unsigned char oldval; | |
1593 | unsigned char newval; | |
1594 | nand = mtd->priv; | |
1595 | doc = nand->priv; | |
1596 | /* Use the alias resolution register to determine if this is | |
1597 | in fact the same DOC aliased to a new address. If writes | |
1598 | to one chip's alias resolution register change the value on | |
1599 | the other chip, they're the same chip. */ | |
1600 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1601 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1602 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1603 | } else { | |
1604 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1605 | newval = ReadDOC(virtadr, AliasResolution); | |
1606 | } | |
1607 | if (oldval != newval) | |
1608 | continue; | |
1609 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1610 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1611 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1612 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1613 | } else { |
1614 | WriteDOC(~newval, virtadr, AliasResolution); | |
1615 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1616 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1617 | } |
1618 | newval = ~newval; | |
1619 | if (oldval == newval) { | |
1620 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1621 | goto notfound; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1626 | ||
1627 | len = sizeof(struct mtd_info) + | |
e0c7d767 | 1628 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
95b93a0c | 1629 | mtd = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1630 | if (!mtd) { |
1631 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1632 | ret = -ENOMEM; | |
1633 | goto fail; | |
1634 | } | |
1da177e4 LT |
1635 | |
1636 | nand = (struct nand_chip *) (mtd + 1); | |
1637 | doc = (struct doc_priv *) (nand + 1); | |
1638 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1639 | nand->bbt_md = nand->bbt_td + 1; | |
1640 | ||
1641 | mtd->priv = nand; | |
1642 | mtd->owner = THIS_MODULE; | |
1643 | ||
1644 | nand->priv = doc; | |
1645 | nand->select_chip = doc200x_select_chip; | |
7abd3ef9 | 1646 | nand->cmd_ctrl = doc200x_hwcontrol; |
1da177e4 LT |
1647 | nand->dev_ready = doc200x_dev_ready; |
1648 | nand->waitfunc = doc200x_wait; | |
1649 | nand->block_bad = doc200x_block_bad; | |
6dfc6d25 TG |
1650 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1651 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1652 | nand->ecc.correct = doc200x_correct_data; | |
1da177e4 | 1653 | |
5bd34c09 | 1654 | nand->ecc.layout = &doc200x_oobinfo; |
6dfc6d25 TG |
1655 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; |
1656 | nand->ecc.size = 512; | |
1657 | nand->ecc.bytes = 6; | |
f75e5097 | 1658 | nand->options = NAND_USE_FLASH_BBT; |
1da177e4 LT |
1659 | |
1660 | doc->physadr = physadr; | |
1661 | doc->virtadr = virtadr; | |
1662 | doc->ChipID = ChipID; | |
1663 | doc->curfloor = -1; | |
1664 | doc->curchip = -1; | |
1665 | doc->mh0_page = -1; | |
1666 | doc->mh1_page = -1; | |
1667 | doc->nextdoc = doclist; | |
1668 | ||
1669 | if (ChipID == DOC_ChipID_Doc2k) | |
1670 | numchips = doc2000_init(mtd); | |
1671 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1672 | numchips = doc2001plus_init(mtd); | |
1673 | else | |
1674 | numchips = doc2001_init(mtd); | |
1675 | ||
1676 | if ((ret = nand_scan(mtd, numchips))) { | |
1677 | /* DBB note: i believe nand_release is necessary here, as | |
1678 | buffers may have been allocated in nand_base. Check with | |
1679 | Thomas. FIX ME! */ | |
1680 | /* nand_release will call del_mtd_device, but we haven't yet | |
1681 | added it. This is handled without incident by | |
1682 | del_mtd_device, as far as I can tell. */ | |
1683 | nand_release(mtd); | |
1684 | kfree(mtd); | |
1685 | goto fail; | |
1686 | } | |
1687 | ||
1688 | /* Success! */ | |
1689 | doclist = mtd; | |
1690 | return 0; | |
1691 | ||
e0c7d767 | 1692 | notfound: |
1da177e4 LT |
1693 | /* Put back the contents of the DOCControl register, in case it's not |
1694 | actually a DiskOnChip. */ | |
1695 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1696 | fail: |
1da177e4 LT |
1697 | iounmap(virtadr); |
1698 | return ret; | |
1699 | } | |
1700 | ||
1701 | static void release_nanddoc(void) | |
1702 | { | |
e0c7d767 | 1703 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1704 | struct nand_chip *nand; |
1705 | struct doc_priv *doc; | |
1706 | ||
1707 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1708 | nand = mtd->priv; | |
1709 | doc = nand->priv; | |
1710 | ||
1711 | nextmtd = doc->nextdoc; | |
1712 | nand_release(mtd); | |
1713 | iounmap(doc->virtadr); | |
1714 | kfree(mtd); | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | static int __init init_nanddoc(void) | |
1719 | { | |
1720 | int i, ret = 0; | |
1721 | ||
1722 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1723 | * This way we have it handy, if an error happens |
1da177e4 LT |
1724 | * |
1725 | * Symbolsize is 10 (bits) | |
1726 | * Primitve polynomial is x^10+x^3+1 | |
1727 | * first consecutive root is 510 | |
1728 | * primitve element to generate roots = 1 | |
1729 | * generator polinomial degree = 4 | |
1730 | */ | |
1731 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1732 | if (!rs_decoder) { |
1733 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1734 | return -ENOMEM; |
1735 | } | |
1736 | ||
1737 | if (doc_config_location) { | |
1738 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1739 | ret = doc_probe(doc_config_location); | |
1740 | if (ret < 0) | |
1741 | goto outerr; | |
1742 | } else { | |
e0c7d767 | 1743 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1744 | doc_probe(doc_locations[i]); |
1745 | } | |
1746 | } | |
1747 | /* No banner message any more. Print a message if no DiskOnChip | |
1748 | found, so the user knows we at least tried. */ | |
1749 | if (!doclist) { | |
1750 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1751 | ret = -ENODEV; | |
1752 | goto outerr; | |
1753 | } | |
1754 | return 0; | |
e0c7d767 | 1755 | outerr: |
1da177e4 LT |
1756 | free_rs(rs_decoder); |
1757 | return ret; | |
1758 | } | |
1759 | ||
1760 | static void __exit cleanup_nanddoc(void) | |
1761 | { | |
1762 | /* Cleanup the nand/DoC resources */ | |
1763 | release_nanddoc(); | |
1764 | ||
1765 | /* Free the reed solomon resources */ | |
1766 | if (rs_decoder) { | |
1767 | free_rs(rs_decoder); | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | module_init(init_nanddoc); | |
1772 | module_exit(cleanup_nanddoc); | |
1773 | ||
1774 | MODULE_LICENSE("GPL"); | |
1775 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1776 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); |