Commit | Line | Data |
---|---|---|
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> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
2584cf83 | 27 | #include <linux/io.h> |
1da177e4 LT |
28 | |
29 | #include <linux/mtd/mtd.h> | |
30 | #include <linux/mtd/nand.h> | |
31 | #include <linux/mtd/doc2000.h> | |
1da177e4 LT |
32 | #include <linux/mtd/partitions.h> |
33 | #include <linux/mtd/inftl.h> | |
a0e5cc58 | 34 | #include <linux/module.h> |
1da177e4 LT |
35 | |
36 | /* Where to look for the devices? */ | |
651078ba TG |
37 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
38 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
1da177e4 LT |
39 | #endif |
40 | ||
14a95b8a | 41 | static unsigned long doc_locations[] __initdata = { |
1da177e4 | 42 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) |
651078ba | 43 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
61b03bd7 | 44 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
1da177e4 | 45 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
61b03bd7 TG |
46 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
47 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
1da177e4 | 48 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
9d403496 | 49 | #else |
61b03bd7 | 50 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
1da177e4 | 51 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
61b03bd7 TG |
52 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
53 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
1da177e4 | 54 | 0xe8000, 0xea000, 0xec000, 0xee000, |
9d403496 | 55 | #endif |
1da177e4 LT |
56 | #endif |
57 | 0xffffffff }; | |
58 | ||
59 | static struct mtd_info *doclist = NULL; | |
60 | ||
61 | struct doc_priv { | |
62 | void __iomem *virtadr; | |
63 | unsigned long physadr; | |
64 | u_char ChipID; | |
65 | u_char CDSNControl; | |
e0c7d767 | 66 | int chips_per_floor; /* The number of chips detected on each floor */ |
1da177e4 LT |
67 | int curfloor; |
68 | int curchip; | |
69 | int mh0_page; | |
70 | int mh1_page; | |
71 | struct mtd_info *nextdoc; | |
d24fe0c3 BN |
72 | |
73 | /* Handle the last stage of initialization (BBT scan, partitioning) */ | |
74 | int (*late_init)(struct mtd_info *mtd); | |
1da177e4 LT |
75 | }; |
76 | ||
1da177e4 LT |
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 }; | |
e0c7d767 | 80 | |
1da177e4 LT |
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 | ||
7abd3ef9 TG |
91 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
92 | unsigned int bitmask); | |
1da177e4 LT |
93 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
94 | ||
e0c7d767 | 95 | static int debug = 0; |
1da177e4 LT |
96 | module_param(debug, int, 0); |
97 | ||
e0c7d767 | 98 | static int try_dword = 1; |
1da177e4 LT |
99 | module_param(try_dword, int, 0); |
100 | ||
e0c7d767 | 101 | static int no_ecc_failures = 0; |
1da177e4 LT |
102 | module_param(no_ecc_failures, int, 0); |
103 | ||
e0c7d767 | 104 | static int no_autopart = 0; |
1da177e4 | 105 | module_param(no_autopart, int, 0); |
1a78ff6b | 106 | |
e0c7d767 | 107 | static int show_firmware_partition = 0; |
1a78ff6b | 108 | module_param(show_firmware_partition, int, 0); |
1da177e4 | 109 | |
89e2bf61 | 110 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE |
e0c7d767 | 111 | static int inftl_bbt_write = 1; |
1da177e4 | 112 | #else |
e0c7d767 | 113 | static int inftl_bbt_write = 0; |
1da177e4 LT |
114 | #endif |
115 | module_param(inftl_bbt_write, int, 0); | |
116 | ||
651078ba | 117 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
61b03bd7 | 135 | /* |
1da177e4 | 136 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
7854d3f7 | 137 | * which we must convert to a standard syndrome usable by the generic |
1da177e4 LT |
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 | |
25985edc | 142 | * of the generic Reed-Solomon library. tglx |
1da177e4 | 143 | */ |
e0c7d767 | 144 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
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 | ||
c9fb6773 | 150 | memset(syn, 0, sizeof(syn)); |
1da177e4 LT |
151 | /* Convert the ecc bytes into words */ |
152 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
153 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
154 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
155 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
156 | parity = ecc[1]; | |
157 | ||
7854d3f7 | 158 | /* Initialize the syndrome buffer */ |
1da177e4 LT |
159 | for (i = 0; i < NROOTS; i++) |
160 | s[i] = ds[0]; | |
61b03bd7 TG |
161 | /* |
162 | * Evaluate | |
1da177e4 LT |
163 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
164 | * where x = alpha^(FCR + i) | |
165 | */ | |
e0c7d767 DW |
166 | for (j = 1; j < NROOTS; j++) { |
167 | if (ds[j] == 0) | |
1da177e4 LT |
168 | continue; |
169 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 170 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
171 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
172 | } | |
173 | ||
c9fb6773 | 174 | /* Calc syn[i] = s[i] / alpha^(v + i) */ |
1da177e4 | 175 | for (i = 0; i < NROOTS; i++) { |
c9fb6773 | 176 | if (s[i]) |
e0c7d767 | 177 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
178 | } |
179 | /* Call the decoder library */ | |
180 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
181 | ||
182 | /* Incorrectable errors ? */ | |
183 | if (nerr < 0) | |
184 | return nerr; | |
185 | ||
61b03bd7 | 186 | /* |
1da177e4 LT |
187 | * Correct the errors. The bitpositions are a bit of magic, |
188 | * but they are given by the design of the de/encoder circuit | |
189 | * in the DoC ASIC's. | |
190 | */ | |
e0c7d767 | 191 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
192 | int index, bitpos, pos = 1015 - errpos[i]; |
193 | uint8_t val; | |
194 | if (pos >= NB_DATA && pos < 1019) | |
195 | continue; | |
196 | if (pos < NB_DATA) { | |
197 | /* extract bit position (MSB first) */ | |
198 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
199 | /* now correct the following 10 bits. At most two bytes | |
200 | can be modified since pos is even */ | |
201 | index = (pos >> 3) ^ 1; | |
202 | bitpos = pos & 7; | |
e0c7d767 | 203 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
204 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
205 | parity ^= val; | |
206 | if (index < SECTOR_SIZE) | |
207 | data[index] ^= val; | |
208 | } | |
209 | index = ((pos >> 3) + 1) ^ 1; | |
210 | bitpos = (bitpos + 10) & 7; | |
211 | if (bitpos == 0) | |
212 | bitpos = 8; | |
e0c7d767 DW |
213 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
214 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
215 | parity ^= val; |
216 | if (index < SECTOR_SIZE) | |
217 | data[index] ^= val; | |
218 | } | |
219 | } | |
220 | } | |
221 | /* If the parity is wrong, no rescue possible */ | |
eb684507 | 222 | return parity ? -EBADMSG : nerr; |
1da177e4 LT |
223 | } |
224 | ||
225 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
226 | { | |
227 | volatile char dummy; | |
228 | int i; | |
61b03bd7 | 229 | |
1da177e4 LT |
230 | for (i = 0; i < cycles; i++) { |
231 | if (DoC_is_Millennium(doc)) | |
232 | dummy = ReadDOC(doc->virtadr, NOP); | |
233 | else if (DoC_is_MillenniumPlus(doc)) | |
234 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
235 | else | |
236 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
237 | } | |
61b03bd7 | 238 | |
1da177e4 LT |
239 | } |
240 | ||
241 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
242 | ||
243 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
244 | static int _DoC_WaitReady(struct doc_priv *doc) | |
245 | { | |
e0c7d767 | 246 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
247 | unsigned long timeo = jiffies + (HZ * 10); |
248 | ||
e0c7d767 DW |
249 | if (debug) |
250 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
251 | /* Out-of-line routine to wait for chip response */ |
252 | if (DoC_is_MillenniumPlus(doc)) { | |
253 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
254 | if (time_after(jiffies, timeo)) { | |
255 | printk("_DoC_WaitReady timed out.\n"); | |
256 | return -EIO; | |
257 | } | |
258 | udelay(1); | |
259 | cond_resched(); | |
260 | } | |
261 | } else { | |
262 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
263 | if (time_after(jiffies, timeo)) { | |
264 | printk("_DoC_WaitReady timed out.\n"); | |
265 | return -EIO; | |
266 | } | |
267 | udelay(1); | |
268 | cond_resched(); | |
269 | } | |
270 | } | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
276 | { | |
e0c7d767 | 277 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
278 | int ret = 0; |
279 | ||
280 | if (DoC_is_MillenniumPlus(doc)) { | |
281 | DoC_Delay(doc, 4); | |
282 | ||
283 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
284 | /* Call the out-of-line routine to wait */ | |
285 | ret = _DoC_WaitReady(doc); | |
286 | } else { | |
287 | DoC_Delay(doc, 4); | |
288 | ||
289 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
290 | /* Call the out-of-line routine to wait */ | |
291 | ret = _DoC_WaitReady(doc); | |
292 | DoC_Delay(doc, 2); | |
293 | } | |
294 | ||
e0c7d767 DW |
295 | if (debug) |
296 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
297 | return ret; |
298 | } | |
299 | ||
300 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
301 | { | |
302 | struct nand_chip *this = mtd->priv; | |
303 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 304 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 305 | |
e0c7d767 DW |
306 | if (debug) |
307 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
308 | WriteDOC(datum, docptr, CDSNSlowIO); |
309 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
310 | } | |
311 | ||
312 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
313 | { | |
314 | struct nand_chip *this = mtd->priv; | |
315 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 316 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
317 | u_char ret; |
318 | ||
319 | ReadDOC(docptr, CDSNSlowIO); | |
320 | DoC_Delay(doc, 2); | |
321 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
322 | if (debug) |
323 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
324 | return ret; |
325 | } | |
326 | ||
e0c7d767 | 327 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
328 | { |
329 | struct nand_chip *this = mtd->priv; | |
330 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 331 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 332 | int i; |
e0c7d767 DW |
333 | if (debug) |
334 | printk("writebuf of %d bytes: ", len); | |
335 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
336 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
337 | if (debug && i < 16) | |
338 | printk("%02x ", buf[i]); | |
339 | } | |
e0c7d767 DW |
340 | if (debug) |
341 | printk("\n"); | |
1da177e4 LT |
342 | } |
343 | ||
e0c7d767 | 344 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
345 | { |
346 | struct nand_chip *this = mtd->priv; | |
347 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
348 | void __iomem *docptr = doc->virtadr; |
349 | int i; | |
1da177e4 | 350 | |
e0c7d767 DW |
351 | if (debug) |
352 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 353 | |
e0c7d767 | 354 | for (i = 0; i < len; i++) { |
1da177e4 LT |
355 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
356 | } | |
357 | } | |
358 | ||
e0c7d767 | 359 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
360 | { |
361 | struct nand_chip *this = mtd->priv; | |
362 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
363 | void __iomem *docptr = doc->virtadr; |
364 | int i; | |
1da177e4 | 365 | |
e0c7d767 DW |
366 | if (debug) |
367 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 368 | |
e0c7d767 DW |
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); | |
1da177e4 LT |
372 | } |
373 | } else { | |
e0c7d767 DW |
374 | for (i = 0; i < len; i += 4) { |
375 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
376 | } |
377 | } | |
378 | } | |
379 | ||
1da177e4 LT |
380 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) |
381 | { | |
382 | struct nand_chip *this = mtd->priv; | |
383 | struct doc_priv *doc = this->priv; | |
384 | uint16_t ret; | |
385 | ||
386 | doc200x_select_chip(mtd, nr); | |
7abd3ef9 TG |
387 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
388 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
389 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
390 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 391 | |
e9c54999 | 392 | /* We can't use dev_ready here, but at least we wait for the |
61b03bd7 | 393 | * command to complete |
dfd61294 TG |
394 | */ |
395 | udelay(50); | |
61b03bd7 | 396 | |
1da177e4 LT |
397 | ret = this->read_byte(mtd) << 8; |
398 | ret |= this->read_byte(mtd); | |
399 | ||
400 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
401 | /* First chip probe. See if we get same results by 32-bit access */ | |
402 | union { | |
403 | uint32_t dword; | |
404 | uint8_t byte[4]; | |
405 | } ident; | |
406 | void __iomem *docptr = doc->virtadr; | |
407 | ||
7abd3ef9 TG |
408 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
409 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
410 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
411 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
412 | NAND_NCE | NAND_CTRL_CHANGE); | |
1da177e4 | 413 | |
dfd61294 TG |
414 | udelay(50); |
415 | ||
1da177e4 LT |
416 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
417 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
418 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
419 | this->read_buf = &doc2000_readbuf_dword; | |
420 | } | |
421 | } | |
61b03bd7 | 422 | |
1da177e4 LT |
423 | return ret; |
424 | } | |
425 | ||
426 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
427 | { | |
428 | struct nand_chip *this = mtd->priv; | |
429 | struct doc_priv *doc = this->priv; | |
430 | uint16_t mfrid; | |
431 | int i; | |
432 | ||
433 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
434 | doc->chips_per_floor = 4; | |
435 | ||
436 | /* Find out what the first chip is */ | |
437 | mfrid = doc200x_ident_chip(mtd, 0); | |
438 | ||
439 | /* Find how many chips in each floor. */ | |
440 | for (i = 1; i < 4; i++) { | |
441 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
442 | break; | |
443 | } | |
444 | doc->chips_per_floor = i; | |
445 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
446 | } | |
447 | ||
7bc3312b | 448 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 LT |
449 | { |
450 | struct doc_priv *doc = this->priv; | |
451 | ||
452 | int status; | |
61b03bd7 | 453 | |
1da177e4 LT |
454 | DoC_WaitReady(doc); |
455 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
456 | DoC_WaitReady(doc); | |
457 | status = (int)this->read_byte(mtd); | |
458 | ||
459 | return status; | |
460 | } | |
461 | ||
462 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
463 | { | |
464 | struct nand_chip *this = mtd->priv; | |
465 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 466 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
467 | |
468 | WriteDOC(datum, docptr, CDSNSlowIO); | |
469 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
470 | WriteDOC(datum, docptr, WritePipeTerm); | |
471 | } | |
472 | ||
473 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
474 | { | |
475 | struct nand_chip *this = mtd->priv; | |
476 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 477 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
478 | |
479 | //ReadDOC(docptr, CDSNSlowIO); | |
480 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
481 | DoC_Delay(doc, 2); | |
482 | ReadDOC(docptr, ReadPipeInit); | |
483 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
484 | return ReadDOC(docptr, LastDataRead); | |
485 | } | |
486 | ||
e0c7d767 | 487 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
488 | { |
489 | struct nand_chip *this = mtd->priv; | |
490 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 491 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
492 | int i; |
493 | ||
e0c7d767 | 494 | for (i = 0; i < len; i++) |
1da177e4 LT |
495 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
496 | /* Terminate write pipeline */ | |
497 | WriteDOC(0x00, docptr, WritePipeTerm); | |
498 | } | |
499 | ||
e0c7d767 | 500 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
501 | { |
502 | struct nand_chip *this = mtd->priv; | |
503 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 504 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
505 | int i; |
506 | ||
507 | /* Start read pipeline */ | |
508 | ReadDOC(docptr, ReadPipeInit); | |
509 | ||
e0c7d767 | 510 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
511 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
512 | ||
513 | /* Terminate read pipeline */ | |
514 | buf[i] = ReadDOC(docptr, LastDataRead); | |
515 | } | |
516 | ||
1da177e4 LT |
517 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) |
518 | { | |
519 | struct nand_chip *this = mtd->priv; | |
520 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 521 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
522 | u_char ret; |
523 | ||
e0c7d767 DW |
524 | ReadDOC(docptr, Mplus_ReadPipeInit); |
525 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
526 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
527 | if (debug) | |
528 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
529 | return ret; |
530 | } | |
531 | ||
e0c7d767 | 532 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
533 | { |
534 | struct nand_chip *this = mtd->priv; | |
535 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 536 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
537 | int i; |
538 | ||
e0c7d767 DW |
539 | if (debug) |
540 | printk("writebuf of %d bytes: ", len); | |
541 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
542 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
543 | if (debug && i < 16) | |
544 | printk("%02x ", buf[i]); | |
545 | } | |
e0c7d767 DW |
546 | if (debug) |
547 | printk("\n"); | |
1da177e4 LT |
548 | } |
549 | ||
e0c7d767 | 550 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
551 | { |
552 | struct nand_chip *this = mtd->priv; | |
553 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 554 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
555 | int i; |
556 | ||
e0c7d767 DW |
557 | if (debug) |
558 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
559 | |
560 | /* Start read pipeline */ | |
561 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
562 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
563 | ||
e0c7d767 | 564 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
565 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
566 | if (debug && i < 16) | |
567 | printk("%02x ", buf[i]); | |
568 | } | |
569 | ||
570 | /* Terminate read pipeline */ | |
e0c7d767 | 571 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 572 | if (debug && i < 16) |
e0c7d767 DW |
573 | printk("%02x ", buf[len - 2]); |
574 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 575 | if (debug && i < 16) |
e0c7d767 DW |
576 | printk("%02x ", buf[len - 1]); |
577 | if (debug) | |
578 | printk("\n"); | |
1da177e4 LT |
579 | } |
580 | ||
1da177e4 LT |
581 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) |
582 | { | |
583 | struct nand_chip *this = mtd->priv; | |
584 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 585 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
586 | int floor = 0; |
587 | ||
e0c7d767 DW |
588 | if (debug) |
589 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
590 | |
591 | if (chip == -1) { | |
592 | /* Disable flash internally */ | |
593 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
594 | return; | |
595 | } | |
596 | ||
597 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 598 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
599 | |
600 | /* Assert ChipEnable and deassert WriteProtect */ | |
601 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
602 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
603 | ||
604 | doc->curchip = chip; | |
605 | doc->curfloor = floor; | |
606 | } | |
607 | ||
608 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
609 | { | |
610 | struct nand_chip *this = mtd->priv; | |
611 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 612 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
613 | int floor = 0; |
614 | ||
e0c7d767 DW |
615 | if (debug) |
616 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
617 | |
618 | if (chip == -1) | |
619 | return; | |
620 | ||
621 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 622 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
623 | |
624 | /* 11.4.4 -- deassert CE before changing chip */ | |
7abd3ef9 | 625 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
626 | |
627 | WriteDOC(floor, docptr, FloorSelect); | |
628 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
629 | ||
7abd3ef9 | 630 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
631 | |
632 | doc->curchip = chip; | |
633 | doc->curfloor = floor; | |
634 | } | |
635 | ||
7abd3ef9 TG |
636 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
637 | ||
638 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
639 | unsigned int ctrl) | |
1da177e4 LT |
640 | { |
641 | struct nand_chip *this = mtd->priv; | |
642 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 643 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 644 | |
7abd3ef9 TG |
645 | if (ctrl & NAND_CTRL_CHANGE) { |
646 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
647 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
648 | if (debug) | |
649 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
650 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
651 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
652 | DoC_Delay(doc, 4); | |
1da177e4 | 653 | } |
cad74f2c TG |
654 | if (cmd != NAND_CMD_NONE) { |
655 | if (DoC_is_2000(doc)) | |
656 | doc2000_write_byte(mtd, cmd); | |
657 | else | |
658 | doc2001_write_byte(mtd, cmd); | |
659 | } | |
1da177e4 LT |
660 | } |
661 | ||
e0c7d767 | 662 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
663 | { |
664 | struct nand_chip *this = mtd->priv; | |
665 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 666 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
667 | |
668 | /* | |
669 | * Must terminate write pipeline before sending any commands | |
670 | * to the device. | |
671 | */ | |
672 | if (command == NAND_CMD_PAGEPROG) { | |
673 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
674 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
675 | } | |
676 | ||
677 | /* | |
678 | * Write out the command to the device. | |
679 | */ | |
680 | if (command == NAND_CMD_SEQIN) { | |
681 | int readcmd; | |
682 | ||
28318776 | 683 | if (column >= mtd->writesize) { |
1da177e4 | 684 | /* OOB area */ |
28318776 | 685 | column -= mtd->writesize; |
1da177e4 LT |
686 | readcmd = NAND_CMD_READOOB; |
687 | } else if (column < 256) { | |
688 | /* First 256 bytes --> READ0 */ | |
689 | readcmd = NAND_CMD_READ0; | |
690 | } else { | |
691 | column -= 256; | |
692 | readcmd = NAND_CMD_READ1; | |
693 | } | |
694 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
695 | } | |
696 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
697 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
698 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
699 | ||
700 | if (column != -1 || page_addr != -1) { | |
701 | /* Serially input address */ | |
702 | if (column != -1) { | |
703 | /* Adjust columns for 16 bit buswidth */ | |
3dad2344 BN |
704 | if (this->options & NAND_BUSWIDTH_16 && |
705 | !nand_opcode_8bits(command)) | |
1da177e4 LT |
706 | column >>= 1; |
707 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
708 | } | |
709 | if (page_addr != -1) { | |
e0c7d767 DW |
710 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
711 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
712 | /* One more address cycle for higher density devices */ |
713 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 714 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
715 | printk("high density\n"); |
716 | } | |
717 | } | |
718 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
719 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
720 | /* deassert ALE */ | |
e0c7d767 DW |
721 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
722 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
723 | WriteDOC(0, docptr, Mplus_FlashControl); |
724 | } | |
725 | ||
61b03bd7 | 726 | /* |
1da177e4 LT |
727 | * program and erase have their own busy handlers |
728 | * status and sequential in needs no delay | |
e0c7d767 | 729 | */ |
1da177e4 LT |
730 | switch (command) { |
731 | ||
732 | case NAND_CMD_PAGEPROG: | |
733 | case NAND_CMD_ERASE1: | |
734 | case NAND_CMD_ERASE2: | |
735 | case NAND_CMD_SEQIN: | |
736 | case NAND_CMD_STATUS: | |
737 | return; | |
738 | ||
739 | case NAND_CMD_RESET: | |
740 | if (this->dev_ready) | |
741 | break; | |
742 | udelay(this->chip_delay); | |
743 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
744 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
745 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 746 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
747 | return; |
748 | ||
e0c7d767 | 749 | /* This applies to read commands */ |
1da177e4 | 750 | default: |
61b03bd7 | 751 | /* |
1da177e4 LT |
752 | * If we don't have access to the busy pin, we apply the given |
753 | * command delay | |
e0c7d767 | 754 | */ |
1da177e4 | 755 | if (!this->dev_ready) { |
e0c7d767 | 756 | udelay(this->chip_delay); |
1da177e4 LT |
757 | return; |
758 | } | |
759 | } | |
760 | ||
761 | /* Apply this short delay always to ensure that we do wait tWB in | |
762 | * any case on any machine. */ | |
e0c7d767 | 763 | ndelay(100); |
1da177e4 | 764 | /* wait until command is processed */ |
e0c7d767 | 765 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
766 | } |
767 | ||
768 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
769 | { | |
770 | struct nand_chip *this = mtd->priv; | |
771 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 772 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
773 | |
774 | if (DoC_is_MillenniumPlus(doc)) { | |
775 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
776 | DoC_Delay(doc, 4); | |
777 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 778 | if (debug) |
1da177e4 LT |
779 | printk("not ready\n"); |
780 | return 0; | |
781 | } | |
e0c7d767 DW |
782 | if (debug) |
783 | printk("was ready\n"); | |
1da177e4 LT |
784 | return 1; |
785 | } else { | |
786 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
787 | DoC_Delay(doc, 4); | |
788 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 789 | if (debug) |
1da177e4 LT |
790 | printk("not ready\n"); |
791 | return 0; | |
792 | } | |
793 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
794 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
795 | if (debug) |
796 | printk("was ready\n"); | |
1da177e4 LT |
797 | return 1; |
798 | } | |
799 | } | |
800 | ||
801 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
802 | { | |
803 | /* This is our last resort if we couldn't find or create a BBT. Just | |
804 | pretend all blocks are good. */ | |
805 | return 0; | |
806 | } | |
807 | ||
808 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
809 | { | |
810 | struct nand_chip *this = mtd->priv; | |
811 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 812 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
813 | |
814 | /* Prime the ECC engine */ | |
e0c7d767 | 815 | switch (mode) { |
1da177e4 LT |
816 | case NAND_ECC_READ: |
817 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
818 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
819 | break; | |
820 | case NAND_ECC_WRITE: | |
821 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
822 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
823 | break; | |
824 | } | |
825 | } | |
826 | ||
827 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
828 | { | |
829 | struct nand_chip *this = mtd->priv; | |
830 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 831 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
832 | |
833 | /* Prime the ECC engine */ | |
e0c7d767 | 834 | switch (mode) { |
1da177e4 LT |
835 | case NAND_ECC_READ: |
836 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
837 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
838 | break; | |
839 | case NAND_ECC_WRITE: | |
840 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
841 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
842 | break; | |
843 | } | |
844 | } | |
845 | ||
846 | /* This code is only called on write */ | |
e0c7d767 | 847 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 LT |
848 | { |
849 | struct nand_chip *this = mtd->priv; | |
850 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 851 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
852 | int i; |
853 | int emptymatch = 1; | |
854 | ||
855 | /* flush the pipeline */ | |
856 | if (DoC_is_2000(doc)) { | |
857 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
858 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
859 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
860 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
861 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
862 | } else if (DoC_is_MillenniumPlus(doc)) { | |
863 | WriteDOC(0, docptr, Mplus_NOP); | |
864 | WriteDOC(0, docptr, Mplus_NOP); | |
865 | WriteDOC(0, docptr, Mplus_NOP); | |
866 | } else { | |
867 | WriteDOC(0, docptr, NOP); | |
868 | WriteDOC(0, docptr, NOP); | |
869 | WriteDOC(0, docptr, NOP); | |
870 | } | |
871 | ||
872 | for (i = 0; i < 6; i++) { | |
873 | if (DoC_is_MillenniumPlus(doc)) | |
874 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 875 | else |
1da177e4 LT |
876 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
877 | if (ecc_code[i] != empty_write_ecc[i]) | |
878 | emptymatch = 0; | |
879 | } | |
880 | if (DoC_is_MillenniumPlus(doc)) | |
881 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
882 | else | |
883 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
884 | #if 0 | |
885 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
886 | if (emptymatch) { | |
887 | /* Note: this somewhat expensive test should not be triggered | |
888 | often. It could be optimized away by examining the data in | |
889 | the writebuf routine, and remembering the result. */ | |
890 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
891 | if (dat[i] == 0xff) |
892 | continue; | |
1da177e4 LT |
893 | emptymatch = 0; |
894 | break; | |
895 | } | |
896 | } | |
897 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
898 | Return all-0xff ecc value instead of the computed one, so | |
899 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
900 | if (emptymatch) |
901 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
902 | #endif |
903 | return 0; | |
904 | } | |
905 | ||
f5bbdacc TG |
906 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
907 | u_char *read_ecc, u_char *isnull) | |
1da177e4 LT |
908 | { |
909 | int i, ret = 0; | |
910 | struct nand_chip *this = mtd->priv; | |
911 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 912 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 913 | uint8_t calc_ecc[6]; |
1da177e4 LT |
914 | volatile u_char dummy; |
915 | int emptymatch = 1; | |
61b03bd7 | 916 | |
1da177e4 LT |
917 | /* flush the pipeline */ |
918 | if (DoC_is_2000(doc)) { | |
919 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
920 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
921 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
922 | } else if (DoC_is_MillenniumPlus(doc)) { | |
923 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
924 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
925 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
926 | } else { | |
927 | dummy = ReadDOC(docptr, ECCConf); | |
928 | dummy = ReadDOC(docptr, ECCConf); | |
929 | dummy = ReadDOC(docptr, ECCConf); | |
930 | } | |
61b03bd7 | 931 | |
25985edc | 932 | /* Error occurred ? */ |
1da177e4 LT |
933 | if (dummy & 0x80) { |
934 | for (i = 0; i < 6; i++) { | |
935 | if (DoC_is_MillenniumPlus(doc)) | |
936 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
937 | else | |
938 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
939 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
940 | emptymatch = 0; | |
941 | } | |
942 | /* If emptymatch=1, the read syndrome is consistent with an | |
943 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
944 | if (emptymatch) { | |
945 | for (i = 0; i < 6; i++) { | |
e0c7d767 DW |
946 | if (read_ecc[i] == 0xff) |
947 | continue; | |
1da177e4 LT |
948 | emptymatch = 0; |
949 | break; | |
950 | } | |
951 | } | |
952 | /* If emptymatch still =1, check the data block. */ | |
953 | if (emptymatch) { | |
e0c7d767 DW |
954 | /* Note: this somewhat expensive test should not be triggered |
955 | often. It could be optimized away by examining the data in | |
956 | the readbuf routine, and remembering the result. */ | |
1da177e4 | 957 | for (i = 0; i < 512; i++) { |
e0c7d767 DW |
958 | if (dat[i] == 0xff) |
959 | continue; | |
1da177e4 LT |
960 | emptymatch = 0; |
961 | break; | |
962 | } | |
963 | } | |
964 | /* If emptymatch still =1, this is almost certainly a freshly- | |
965 | erased block, in which case the ECC will not come out right. | |
966 | We'll suppress the error and tell the caller everything's | |
967 | OK. Because it is. */ | |
e0c7d767 DW |
968 | if (!emptymatch) |
969 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
970 | if (ret > 0) |
971 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 972 | } |
1da177e4 LT |
973 | if (DoC_is_MillenniumPlus(doc)) |
974 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
975 | else | |
976 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
d57f4054 | 977 | if (no_ecc_failures && mtd_is_eccerr(ret)) { |
1da177e4 LT |
978 | printk(KERN_ERR "suppressing ECC failure\n"); |
979 | ret = 0; | |
980 | } | |
981 | return ret; | |
982 | } | |
61b03bd7 | 983 | |
1da177e4 LT |
984 | //u_char mydatabuf[528]; |
985 | ||
abc37e67 DB |
986 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
987 | * attempt to retain compatibility. It used to read: | |
988 | * .oobfree = { {8, 8} } | |
989 | * Since that leaves two bytes unusable, it was changed. But the following | |
990 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
991 | * .oobfree = { {6, 10} } | |
992 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
993 | * safer. The only problem with it is that any code that parses oobfree must | |
994 | * be able to handle out-of-order segments. | |
995 | */ | |
5bd34c09 | 996 | static struct nand_ecclayout doc200x_oobinfo = { |
e0c7d767 DW |
997 | .eccbytes = 6, |
998 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
999 | .oobfree = {{8, 8}, {6, 2}} | |
1da177e4 | 1000 | }; |
61b03bd7 | 1001 | |
1da177e4 | 1002 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
af901ca1 | 1003 | On successful return, buf will contain a copy of the media header for |
1da177e4 LT |
1004 | further processing. id is the string to scan for, and will presumably be |
1005 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1006 | header. The page #s of the found media headers are placed in mh0_page and | |
1007 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1008 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 LT |
1009 | { |
1010 | struct nand_chip *this = mtd->priv; | |
1011 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1012 | unsigned offs; |
1da177e4 LT |
1013 | int ret; |
1014 | size_t retlen; | |
1015 | ||
1a78ff6b | 1016 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
329ad399 | 1017 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 1018 | if (retlen != mtd->writesize) |
e0c7d767 | 1019 | continue; |
1da177e4 | 1020 | if (ret) { |
e0c7d767 | 1021 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1022 | } |
e0c7d767 DW |
1023 | if (memcmp(buf, id, 6)) |
1024 | continue; | |
1da177e4 LT |
1025 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1026 | if (doc->mh0_page == -1) { | |
1027 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1028 | if (!findmirror) |
1029 | return 1; | |
1da177e4 LT |
1030 | continue; |
1031 | } | |
1032 | doc->mh1_page = offs >> this->page_shift; | |
1033 | return 2; | |
1034 | } | |
1035 | if (doc->mh0_page == -1) { | |
1036 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1037 | return 0; | |
1038 | } | |
1039 | /* Only one mediaheader was found. We want buf to contain a | |
1040 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1041 | offs = doc->mh0_page << this->page_shift; | |
329ad399 | 1042 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 1043 | if (retlen != mtd->writesize) { |
1da177e4 LT |
1044 | /* Insanity. Give up. */ |
1045 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1046 | return 0; | |
1047 | } | |
1048 | return 1; | |
1049 | } | |
1050 | ||
e0c7d767 | 1051 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1052 | { |
1053 | struct nand_chip *this = mtd->priv; | |
1054 | struct doc_priv *doc = this->priv; | |
1055 | int ret = 0; | |
1056 | u_char *buf; | |
1057 | struct NFTLMediaHeader *mh; | |
1058 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1059 | int numparts = 0; |
1da177e4 LT |
1060 | unsigned blocks, maxblocks; |
1061 | int offs, numheaders; | |
1062 | ||
28318776 | 1063 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 | 1064 | if (!buf) { |
1da177e4 LT |
1065 | return 0; |
1066 | } | |
e0c7d767 DW |
1067 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1068 | goto out; | |
1069 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1070 | |
96372446 HH |
1071 | le16_to_cpus(&mh->NumEraseUnits); |
1072 | le16_to_cpus(&mh->FirstPhysicalEUN); | |
1073 | le32_to_cpus(&mh->FormattedSize); | |
f29a4b86 | 1074 | |
1da177e4 LT |
1075 | printk(KERN_INFO " DataOrgID = %s\n" |
1076 | " NumEraseUnits = %d\n" | |
1077 | " FirstPhysicalEUN = %d\n" | |
1078 | " FormattedSize = %d\n" | |
1079 | " UnitSizeFactor = %d\n", | |
1080 | mh->DataOrgID, mh->NumEraseUnits, | |
1081 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1082 | mh->UnitSizeFactor); | |
1da177e4 LT |
1083 | |
1084 | blocks = mtd->size >> this->phys_erase_shift; | |
1085 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1086 | ||
1087 | if (mh->UnitSizeFactor == 0x00) { | |
1088 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1089 | - There can be at most 32768 virtual blocks. | |
1090 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1091 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1092 | */ | |
1da177e4 LT |
1093 | mh->UnitSizeFactor = 0xff; |
1094 | while (blocks > maxblocks) { | |
1095 | blocks >>= 1; | |
1096 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1097 | mh->UnitSizeFactor--; | |
1098 | } | |
1099 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1100 | } | |
1101 | ||
1102 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1103 | layers; variables with have already been configured by nand_scan. | |
1104 | Unfortunately, we didn't know before this point what these values | |
25985edc | 1105 | should be. Thus, this code is somewhat dependent on the exact |
1da177e4 LT |
1106 | implementation of the NAND layer. */ |
1107 | if (mh->UnitSizeFactor != 0xff) { | |
1108 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1109 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1110 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1111 | blocks = mtd->size >> this->bbt_erase_shift; | |
1112 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1113 | } | |
1114 | ||
1115 | if (blocks > maxblocks) { | |
1116 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1117 | goto out; | |
1118 | } | |
1119 | ||
1120 | /* Skip past the media headers. */ | |
1121 | offs = max(doc->mh0_page, doc->mh1_page); | |
1122 | offs <<= this->page_shift; | |
1123 | offs += mtd->erasesize; | |
1124 | ||
1a78ff6b DB |
1125 | if (show_firmware_partition == 1) { |
1126 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1127 | parts[0].offset = 0; | |
1128 | parts[0].size = offs; | |
1129 | numparts = 1; | |
1130 | } | |
1131 | ||
1132 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1133 | parts[numparts].offset = offs; | |
1134 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1135 | ||
1136 | offs += parts[numparts].size; | |
1137 | numparts++; | |
1da177e4 | 1138 | |
1da177e4 | 1139 | if (offs < mtd->size) { |
1a78ff6b DB |
1140 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1141 | parts[numparts].offset = offs; | |
1142 | parts[numparts].size = mtd->size - offs; | |
1143 | numparts++; | |
1da177e4 | 1144 | } |
1a78ff6b DB |
1145 | |
1146 | ret = numparts; | |
e0c7d767 | 1147 | out: |
1da177e4 LT |
1148 | kfree(buf); |
1149 | return ret; | |
1150 | } | |
1151 | ||
1152 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1153 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1154 | { |
1155 | struct nand_chip *this = mtd->priv; | |
1156 | struct doc_priv *doc = this->priv; | |
1157 | int ret = 0; | |
1158 | u_char *buf; | |
1159 | struct INFTLMediaHeader *mh; | |
1160 | struct INFTLPartition *ip; | |
1161 | int numparts = 0; | |
1162 | int blocks; | |
1163 | int vshift, lastvunit = 0; | |
1164 | int i; | |
1165 | int end = mtd->size; | |
1166 | ||
1167 | if (inftl_bbt_write) | |
1168 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1169 | ||
28318776 | 1170 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 | 1171 | if (!buf) { |
1da177e4 LT |
1172 | return 0; |
1173 | } | |
1174 | ||
e0c7d767 DW |
1175 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1176 | goto out; | |
1da177e4 | 1177 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1178 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 | 1179 | |
96372446 HH |
1180 | le32_to_cpus(&mh->NoOfBootImageBlocks); |
1181 | le32_to_cpus(&mh->NoOfBinaryPartitions); | |
1182 | le32_to_cpus(&mh->NoOfBDTLPartitions); | |
1183 | le32_to_cpus(&mh->BlockMultiplierBits); | |
1184 | le32_to_cpus(&mh->FormatFlags); | |
1185 | le32_to_cpus(&mh->PercentUsed); | |
61b03bd7 | 1186 | |
1da177e4 LT |
1187 | printk(KERN_INFO " bootRecordID = %s\n" |
1188 | " NoOfBootImageBlocks = %d\n" | |
1189 | " NoOfBinaryPartitions = %d\n" | |
1190 | " NoOfBDTLPartitions = %d\n" | |
1191 | " BlockMultiplerBits = %d\n" | |
1192 | " FormatFlgs = %d\n" | |
1193 | " OsakVersion = %d.%d.%d.%d\n" | |
1194 | " PercentUsed = %d\n", | |
1195 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1196 | mh->NoOfBinaryPartitions, | |
1197 | mh->NoOfBDTLPartitions, | |
1198 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1199 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1200 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1201 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1202 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1203 | mh->PercentUsed); | |
1da177e4 LT |
1204 | |
1205 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1206 | ||
1207 | blocks = mtd->size >> vshift; | |
1208 | if (blocks > 32768) { | |
1209 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1210 | goto out; | |
1211 | } | |
1212 | ||
1213 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1214 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1215 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1216 | goto out; | |
1217 | } | |
1218 | ||
1219 | /* Scan the partitions */ | |
1220 | for (i = 0; (i < 4); i++) { | |
1221 | ip = &(mh->Partitions[i]); | |
96372446 HH |
1222 | le32_to_cpus(&ip->virtualUnits); |
1223 | le32_to_cpus(&ip->firstUnit); | |
1224 | le32_to_cpus(&ip->lastUnit); | |
1225 | le32_to_cpus(&ip->flags); | |
1226 | le32_to_cpus(&ip->spareUnits); | |
1227 | le32_to_cpus(&ip->Reserved0); | |
1da177e4 | 1228 | |
1da177e4 LT |
1229 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1230 | " virtualUnits = %d\n" | |
1231 | " firstUnit = %d\n" | |
1232 | " lastUnit = %d\n" | |
1233 | " flags = 0x%x\n" | |
1234 | " spareUnits = %d\n", | |
1235 | i, ip->virtualUnits, ip->firstUnit, | |
1236 | ip->lastUnit, ip->flags, | |
1237 | ip->spareUnits); | |
1da177e4 | 1238 | |
1a78ff6b DB |
1239 | if ((show_firmware_partition == 1) && |
1240 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1241 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1242 | parts[0].offset = 0; | |
1243 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1244 | numparts = 1; | |
1245 | } | |
1da177e4 LT |
1246 | |
1247 | if (ip->flags & INFTL_BINARY) | |
1248 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1249 | else | |
1250 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1251 | parts[numparts].offset = ip->firstUnit << vshift; | |
1252 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1253 | numparts++; | |
e0c7d767 DW |
1254 | if (ip->lastUnit > lastvunit) |
1255 | lastvunit = ip->lastUnit; | |
1256 | if (ip->flags & INFTL_LAST) | |
1257 | break; | |
1da177e4 LT |
1258 | } |
1259 | lastvunit++; | |
1260 | if ((lastvunit << vshift) < end) { | |
1261 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1262 | parts[numparts].offset = lastvunit << vshift; | |
1263 | parts[numparts].size = end - parts[numparts].offset; | |
1264 | numparts++; | |
1265 | } | |
1266 | ret = numparts; | |
e0c7d767 | 1267 | out: |
1da177e4 LT |
1268 | kfree(buf); |
1269 | return ret; | |
1270 | } | |
1271 | ||
1272 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1273 | { | |
1274 | int ret, numparts; | |
1275 | struct nand_chip *this = mtd->priv; | |
1276 | struct doc_priv *doc = this->priv; | |
1277 | struct mtd_partition parts[2]; | |
1278 | ||
e0c7d767 | 1279 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1280 | /* On NFTL, we have to find the media headers before we can read the |
1281 | BBTs, since they're stored in the media header eraseblocks. */ | |
1282 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1283 | if (!numparts) |
1284 | return -EIO; | |
1da177e4 LT |
1285 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1286 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1287 | NAND_BBT_VERSION; | |
1288 | this->bbt_td->veroffs = 7; | |
1289 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1290 | if (doc->mh1_page != -1) { | |
1291 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1292 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1293 | NAND_BBT_VERSION; | |
1294 | this->bbt_md->veroffs = 7; | |
1295 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1296 | } else { | |
1297 | this->bbt_md = NULL; | |
1298 | } | |
1299 | ||
d24fe0c3 BN |
1300 | ret = this->scan_bbt(mtd); |
1301 | if (ret) | |
1da177e4 | 1302 | return ret; |
d24fe0c3 | 1303 | |
6a7c7334 | 1304 | return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts); |
1da177e4 LT |
1305 | } |
1306 | ||
1307 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1308 | { | |
1309 | int ret, numparts; | |
1310 | struct nand_chip *this = mtd->priv; | |
1311 | struct doc_priv *doc = this->priv; | |
1312 | struct mtd_partition parts[5]; | |
1313 | ||
1314 | if (this->numchips > doc->chips_per_floor) { | |
1315 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1316 | return -EIO; | |
1317 | } | |
1318 | ||
1319 | if (DoC_is_MillenniumPlus(doc)) { | |
1320 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1321 | if (inftl_bbt_write) | |
1322 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1323 | this->bbt_td->pages[0] = 2; | |
1324 | this->bbt_md = NULL; | |
1325 | } else { | |
e0c7d767 | 1326 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1327 | if (inftl_bbt_write) |
1328 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1329 | this->bbt_td->offs = 8; | |
1330 | this->bbt_td->len = 8; | |
1331 | this->bbt_td->veroffs = 7; | |
1332 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1333 | this->bbt_td->reserved_block_code = 0x01; | |
1334 | this->bbt_td->pattern = "MSYS_BBT"; | |
1335 | ||
e0c7d767 | 1336 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1337 | if (inftl_bbt_write) |
1338 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1339 | this->bbt_md->offs = 8; | |
1340 | this->bbt_md->len = 8; | |
1341 | this->bbt_md->veroffs = 7; | |
1342 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1343 | this->bbt_md->reserved_block_code = 0x01; | |
1344 | this->bbt_md->pattern = "TBB_SYSM"; | |
1345 | } | |
1346 | ||
d24fe0c3 BN |
1347 | ret = this->scan_bbt(mtd); |
1348 | if (ret) | |
1da177e4 | 1349 | return ret; |
d24fe0c3 | 1350 | |
e0c7d767 | 1351 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1352 | numparts = inftl_partscan(mtd, parts); |
1353 | /* At least for now, require the INFTL Media Header. We could probably | |
1354 | do without it for non-INFTL use, since all it gives us is | |
1355 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1356 | if (!numparts) |
1357 | return -EIO; | |
6a7c7334 | 1358 | return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts); |
1da177e4 LT |
1359 | } |
1360 | ||
1361 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1362 | { | |
1363 | struct nand_chip *this = mtd->priv; | |
1364 | struct doc_priv *doc = this->priv; | |
1365 | ||
1da177e4 LT |
1366 | this->read_byte = doc2000_read_byte; |
1367 | this->write_buf = doc2000_writebuf; | |
1368 | this->read_buf = doc2000_readbuf; | |
d24fe0c3 | 1369 | doc->late_init = nftl_scan_bbt; |
1da177e4 LT |
1370 | |
1371 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1372 | doc2000_count_chips(mtd); | |
1373 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1374 | return (4 * doc->chips_per_floor); | |
1375 | } | |
1376 | ||
1377 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1378 | { | |
1379 | struct nand_chip *this = mtd->priv; | |
1380 | struct doc_priv *doc = this->priv; | |
1381 | ||
1da177e4 LT |
1382 | this->read_byte = doc2001_read_byte; |
1383 | this->write_buf = doc2001_writebuf; | |
1384 | this->read_buf = doc2001_readbuf; | |
1da177e4 LT |
1385 | |
1386 | ReadDOC(doc->virtadr, ChipID); | |
1387 | ReadDOC(doc->virtadr, ChipID); | |
1388 | ReadDOC(doc->virtadr, ChipID); | |
1389 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1390 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1391 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1392 | Treat it like a Millennium, except that it |
1393 | can have multiple chips. */ | |
1394 | doc2000_count_chips(mtd); | |
1395 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
d24fe0c3 | 1396 | doc->late_init = inftl_scan_bbt; |
1da177e4 LT |
1397 | return (4 * doc->chips_per_floor); |
1398 | } else { | |
1399 | /* Bog-standard Millennium */ | |
1400 | doc->chips_per_floor = 1; | |
1401 | mtd->name = "DiskOnChip Millennium"; | |
d24fe0c3 | 1402 | doc->late_init = nftl_scan_bbt; |
1da177e4 LT |
1403 | return 1; |
1404 | } | |
1405 | } | |
1406 | ||
1407 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1408 | { | |
1409 | struct nand_chip *this = mtd->priv; | |
1410 | struct doc_priv *doc = this->priv; | |
1411 | ||
1da177e4 LT |
1412 | this->read_byte = doc2001plus_read_byte; |
1413 | this->write_buf = doc2001plus_writebuf; | |
1414 | this->read_buf = doc2001plus_readbuf; | |
d24fe0c3 | 1415 | doc->late_init = inftl_scan_bbt; |
7abd3ef9 | 1416 | this->cmd_ctrl = NULL; |
1da177e4 LT |
1417 | this->select_chip = doc2001plus_select_chip; |
1418 | this->cmdfunc = doc2001plus_command; | |
0cddd6c2 | 1419 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1420 | |
1421 | doc->chips_per_floor = 1; | |
1422 | mtd->name = "DiskOnChip Millennium Plus"; | |
1423 | ||
1424 | return 1; | |
1425 | } | |
1426 | ||
858119e1 | 1427 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1428 | { |
1429 | unsigned char ChipID; | |
1430 | struct mtd_info *mtd; | |
1431 | struct nand_chip *nand; | |
1432 | struct doc_priv *doc; | |
1433 | void __iomem *virtadr; | |
1434 | unsigned char save_control; | |
1435 | unsigned char tmp, tmpb, tmpc; | |
1436 | int reg, len, numchips; | |
1437 | int ret = 0; | |
1438 | ||
86e4bbc7 | 1439 | if (!request_mem_region(physadr, DOC_IOREMAP_LEN, "DiskOnChip")) |
4f0614a0 | 1440 | return -EBUSY; |
1da177e4 LT |
1441 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); |
1442 | if (!virtadr) { | |
1443 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
4f0614a0 AS |
1444 | ret = -EIO; |
1445 | goto error_ioremap; | |
1da177e4 LT |
1446 | } |
1447 | ||
1448 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1449 | * bootup procedure will put the device into reset mode, and | |
1450 | * it's not possible to talk to it without actually writing | |
1451 | * to the DOCControl register. So we store the current contents | |
1452 | * of the DOCControl register's location, in case we later decide | |
1453 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1454 | * found it. |
1da177e4 LT |
1455 | */ |
1456 | save_control = ReadDOC(virtadr, DOCControl); | |
1457 | ||
1458 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1459 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1460 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1461 | |
1462 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1463 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1464 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1465 | |
1466 | ChipID = ReadDOC(virtadr, ChipID); | |
1467 | ||
e0c7d767 | 1468 | switch (ChipID) { |
1da177e4 LT |
1469 | case DOC_ChipID_Doc2k: |
1470 | reg = DoC_2k_ECCStatus; | |
1471 | break; | |
1472 | case DOC_ChipID_DocMil: | |
1473 | reg = DoC_ECCConf; | |
1474 | break; | |
1475 | case DOC_ChipID_DocMilPlus16: | |
1476 | case DOC_ChipID_DocMilPlus32: | |
1477 | case 0: | |
1478 | /* Possible Millennium Plus, need to do more checks */ | |
1479 | /* Possibly release from power down mode */ | |
1480 | for (tmp = 0; (tmp < 4); tmp++) | |
1481 | ReadDOC(virtadr, Mplus_Power); | |
1482 | ||
1483 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1484 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1485 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1486 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1487 | ||
1488 | mdelay(1); | |
1489 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1490 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1491 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1492 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1493 | mdelay(1); | |
1494 | ||
1495 | ChipID = ReadDOC(virtadr, ChipID); | |
1496 | ||
1497 | switch (ChipID) { | |
1498 | case DOC_ChipID_DocMilPlus16: | |
1499 | reg = DoC_Mplus_Toggle; | |
1500 | break; | |
1501 | case DOC_ChipID_DocMilPlus32: | |
1502 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1503 | default: | |
1504 | ret = -ENODEV; | |
1505 | goto notfound; | |
1506 | } | |
1507 | break; | |
1508 | ||
1509 | default: | |
1510 | ret = -ENODEV; | |
1511 | goto notfound; | |
1512 | } | |
1513 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1514 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1515 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1516 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1517 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1518 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1519 | ret = -ENODEV; | |
1520 | goto notfound; | |
1521 | } | |
1522 | ||
1523 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1524 | unsigned char oldval; | |
1525 | unsigned char newval; | |
1526 | nand = mtd->priv; | |
1527 | doc = nand->priv; | |
1528 | /* Use the alias resolution register to determine if this is | |
1529 | in fact the same DOC aliased to a new address. If writes | |
1530 | to one chip's alias resolution register change the value on | |
1531 | the other chip, they're the same chip. */ | |
1532 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1533 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1534 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1535 | } else { | |
1536 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1537 | newval = ReadDOC(virtadr, AliasResolution); | |
1538 | } | |
1539 | if (oldval != newval) | |
1540 | continue; | |
1541 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1542 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1543 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1544 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1545 | } else { |
1546 | WriteDOC(~newval, virtadr, AliasResolution); | |
1547 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1548 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1549 | } |
1550 | newval = ~newval; | |
1551 | if (oldval == newval) { | |
1552 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1553 | goto notfound; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1558 | ||
1559 | len = sizeof(struct mtd_info) + | |
e0c7d767 | 1560 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
95b93a0c | 1561 | mtd = kzalloc(len, GFP_KERNEL); |
1da177e4 | 1562 | if (!mtd) { |
1da177e4 LT |
1563 | ret = -ENOMEM; |
1564 | goto fail; | |
1565 | } | |
1da177e4 LT |
1566 | |
1567 | nand = (struct nand_chip *) (mtd + 1); | |
1568 | doc = (struct doc_priv *) (nand + 1); | |
1569 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1570 | nand->bbt_md = nand->bbt_td + 1; | |
1571 | ||
1572 | mtd->priv = nand; | |
1573 | mtd->owner = THIS_MODULE; | |
1574 | ||
1575 | nand->priv = doc; | |
1576 | nand->select_chip = doc200x_select_chip; | |
7abd3ef9 | 1577 | nand->cmd_ctrl = doc200x_hwcontrol; |
1da177e4 LT |
1578 | nand->dev_ready = doc200x_dev_ready; |
1579 | nand->waitfunc = doc200x_wait; | |
1580 | nand->block_bad = doc200x_block_bad; | |
6dfc6d25 TG |
1581 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1582 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1583 | nand->ecc.correct = doc200x_correct_data; | |
1da177e4 | 1584 | |
5bd34c09 | 1585 | nand->ecc.layout = &doc200x_oobinfo; |
6dfc6d25 TG |
1586 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; |
1587 | nand->ecc.size = 512; | |
1588 | nand->ecc.bytes = 6; | |
6a918bad | 1589 | nand->ecc.strength = 2; |
bb9ebd4e | 1590 | nand->bbt_options = NAND_BBT_USE_FLASH; |
d24fe0c3 BN |
1591 | /* Skip the automatic BBT scan so we can run it manually */ |
1592 | nand->options |= NAND_SKIP_BBTSCAN; | |
1da177e4 LT |
1593 | |
1594 | doc->physadr = physadr; | |
1595 | doc->virtadr = virtadr; | |
1596 | doc->ChipID = ChipID; | |
1597 | doc->curfloor = -1; | |
1598 | doc->curchip = -1; | |
1599 | doc->mh0_page = -1; | |
1600 | doc->mh1_page = -1; | |
1601 | doc->nextdoc = doclist; | |
1602 | ||
1603 | if (ChipID == DOC_ChipID_Doc2k) | |
1604 | numchips = doc2000_init(mtd); | |
1605 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1606 | numchips = doc2001plus_init(mtd); | |
1607 | else | |
1608 | numchips = doc2001_init(mtd); | |
1609 | ||
d24fe0c3 | 1610 | if ((ret = nand_scan(mtd, numchips)) || (ret = doc->late_init(mtd))) { |
1da177e4 LT |
1611 | /* DBB note: i believe nand_release is necessary here, as |
1612 | buffers may have been allocated in nand_base. Check with | |
1613 | Thomas. FIX ME! */ | |
0f47e952 JI |
1614 | /* nand_release will call mtd_device_unregister, but we |
1615 | haven't yet added it. This is handled without incident by | |
1616 | mtd_device_unregister, as far as I can tell. */ | |
1da177e4 LT |
1617 | nand_release(mtd); |
1618 | kfree(mtd); | |
1619 | goto fail; | |
1620 | } | |
1621 | ||
1622 | /* Success! */ | |
1623 | doclist = mtd; | |
1624 | return 0; | |
1625 | ||
e0c7d767 | 1626 | notfound: |
1da177e4 LT |
1627 | /* Put back the contents of the DOCControl register, in case it's not |
1628 | actually a DiskOnChip. */ | |
1629 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1630 | fail: |
1da177e4 | 1631 | iounmap(virtadr); |
4f0614a0 AS |
1632 | |
1633 | error_ioremap: | |
1634 | release_mem_region(physadr, DOC_IOREMAP_LEN); | |
1635 | ||
1da177e4 LT |
1636 | return ret; |
1637 | } | |
1638 | ||
1639 | static void release_nanddoc(void) | |
1640 | { | |
e0c7d767 | 1641 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1642 | struct nand_chip *nand; |
1643 | struct doc_priv *doc; | |
1644 | ||
1645 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1646 | nand = mtd->priv; | |
1647 | doc = nand->priv; | |
1648 | ||
1649 | nextmtd = doc->nextdoc; | |
1650 | nand_release(mtd); | |
1651 | iounmap(doc->virtadr); | |
4f0614a0 | 1652 | release_mem_region(doc->physadr, DOC_IOREMAP_LEN); |
1da177e4 LT |
1653 | kfree(mtd); |
1654 | } | |
1655 | } | |
1656 | ||
1657 | static int __init init_nanddoc(void) | |
1658 | { | |
1659 | int i, ret = 0; | |
1660 | ||
1661 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1662 | * This way we have it handy, if an error happens |
1da177e4 LT |
1663 | * |
1664 | * Symbolsize is 10 (bits) | |
1665 | * Primitve polynomial is x^10+x^3+1 | |
1666 | * first consecutive root is 510 | |
1667 | * primitve element to generate roots = 1 | |
1668 | * generator polinomial degree = 4 | |
1669 | */ | |
1670 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1671 | if (!rs_decoder) { |
1672 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1673 | return -ENOMEM; |
1674 | } | |
1675 | ||
1676 | if (doc_config_location) { | |
1677 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1678 | ret = doc_probe(doc_config_location); | |
1679 | if (ret < 0) | |
1680 | goto outerr; | |
1681 | } else { | |
e0c7d767 | 1682 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1683 | doc_probe(doc_locations[i]); |
1684 | } | |
1685 | } | |
1686 | /* No banner message any more. Print a message if no DiskOnChip | |
1687 | found, so the user knows we at least tried. */ | |
1688 | if (!doclist) { | |
1689 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1690 | ret = -ENODEV; | |
1691 | goto outerr; | |
1692 | } | |
1693 | return 0; | |
e0c7d767 | 1694 | outerr: |
1da177e4 LT |
1695 | free_rs(rs_decoder); |
1696 | return ret; | |
1697 | } | |
1698 | ||
1699 | static void __exit cleanup_nanddoc(void) | |
1700 | { | |
1701 | /* Cleanup the nand/DoC resources */ | |
1702 | release_nanddoc(); | |
1703 | ||
1704 | /* Free the reed solomon resources */ | |
1705 | if (rs_decoder) { | |
1706 | free_rs(rs_decoder); | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | module_init(init_nanddoc); | |
1711 | module_exit(cleanup_nanddoc); | |
1712 | ||
1713 | MODULE_LICENSE("GPL"); | |
1714 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
2a7af8ca | 1715 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver"); |