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> |
1da177e4 LT |
27 | #include <asm/io.h> |
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> | |
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 | ||
c9fb6773 | 148 | memset(syn, 0, sizeof(syn)); |
1da177e4 LT |
149 | /* Convert the ecc bytes into words */ |
150 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
151 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
152 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
153 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
154 | parity = ecc[1]; | |
155 | ||
156 | /* Initialize the syndrom buffer */ | |
157 | for (i = 0; i < NROOTS; i++) | |
158 | s[i] = ds[0]; | |
61b03bd7 TG |
159 | /* |
160 | * Evaluate | |
1da177e4 LT |
161 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
162 | * where x = alpha^(FCR + i) | |
163 | */ | |
e0c7d767 DW |
164 | for (j = 1; j < NROOTS; j++) { |
165 | if (ds[j] == 0) | |
1da177e4 LT |
166 | continue; |
167 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 168 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
169 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
170 | } | |
171 | ||
c9fb6773 | 172 | /* Calc syn[i] = s[i] / alpha^(v + i) */ |
1da177e4 | 173 | for (i = 0; i < NROOTS; i++) { |
c9fb6773 | 174 | if (s[i]) |
e0c7d767 | 175 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
176 | } |
177 | /* Call the decoder library */ | |
178 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
179 | ||
180 | /* Incorrectable errors ? */ | |
181 | if (nerr < 0) | |
182 | return nerr; | |
183 | ||
61b03bd7 | 184 | /* |
1da177e4 LT |
185 | * Correct the errors. The bitpositions are a bit of magic, |
186 | * but they are given by the design of the de/encoder circuit | |
187 | * in the DoC ASIC's. | |
188 | */ | |
e0c7d767 | 189 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
190 | int index, bitpos, pos = 1015 - errpos[i]; |
191 | uint8_t val; | |
192 | if (pos >= NB_DATA && pos < 1019) | |
193 | continue; | |
194 | if (pos < NB_DATA) { | |
195 | /* extract bit position (MSB first) */ | |
196 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
197 | /* now correct the following 10 bits. At most two bytes | |
198 | can be modified since pos is even */ | |
199 | index = (pos >> 3) ^ 1; | |
200 | bitpos = pos & 7; | |
e0c7d767 | 201 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
202 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
203 | parity ^= val; | |
204 | if (index < SECTOR_SIZE) | |
205 | data[index] ^= val; | |
206 | } | |
207 | index = ((pos >> 3) + 1) ^ 1; | |
208 | bitpos = (bitpos + 10) & 7; | |
209 | if (bitpos == 0) | |
210 | bitpos = 8; | |
e0c7d767 DW |
211 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
212 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
213 | parity ^= val; |
214 | if (index < SECTOR_SIZE) | |
215 | data[index] ^= val; | |
216 | } | |
217 | } | |
218 | } | |
219 | /* If the parity is wrong, no rescue possible */ | |
eb684507 | 220 | return parity ? -EBADMSG : nerr; |
1da177e4 LT |
221 | } |
222 | ||
223 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
224 | { | |
225 | volatile char dummy; | |
226 | int i; | |
61b03bd7 | 227 | |
1da177e4 LT |
228 | for (i = 0; i < cycles; i++) { |
229 | if (DoC_is_Millennium(doc)) | |
230 | dummy = ReadDOC(doc->virtadr, NOP); | |
231 | else if (DoC_is_MillenniumPlus(doc)) | |
232 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
233 | else | |
234 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
235 | } | |
61b03bd7 | 236 | |
1da177e4 LT |
237 | } |
238 | ||
239 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
240 | ||
241 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
242 | static int _DoC_WaitReady(struct doc_priv *doc) | |
243 | { | |
e0c7d767 | 244 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
245 | unsigned long timeo = jiffies + (HZ * 10); |
246 | ||
e0c7d767 DW |
247 | if (debug) |
248 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
249 | /* Out-of-line routine to wait for chip response */ |
250 | if (DoC_is_MillenniumPlus(doc)) { | |
251 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
252 | if (time_after(jiffies, timeo)) { | |
253 | printk("_DoC_WaitReady timed out.\n"); | |
254 | return -EIO; | |
255 | } | |
256 | udelay(1); | |
257 | cond_resched(); | |
258 | } | |
259 | } else { | |
260 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
261 | if (time_after(jiffies, timeo)) { | |
262 | printk("_DoC_WaitReady timed out.\n"); | |
263 | return -EIO; | |
264 | } | |
265 | udelay(1); | |
266 | cond_resched(); | |
267 | } | |
268 | } | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
274 | { | |
e0c7d767 | 275 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
276 | int ret = 0; |
277 | ||
278 | if (DoC_is_MillenniumPlus(doc)) { | |
279 | DoC_Delay(doc, 4); | |
280 | ||
281 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
282 | /* Call the out-of-line routine to wait */ | |
283 | ret = _DoC_WaitReady(doc); | |
284 | } else { | |
285 | DoC_Delay(doc, 4); | |
286 | ||
287 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
288 | /* Call the out-of-line routine to wait */ | |
289 | ret = _DoC_WaitReady(doc); | |
290 | DoC_Delay(doc, 2); | |
291 | } | |
292 | ||
e0c7d767 DW |
293 | if (debug) |
294 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
295 | return ret; |
296 | } | |
297 | ||
298 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
299 | { | |
300 | struct nand_chip *this = mtd->priv; | |
301 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 302 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 303 | |
e0c7d767 DW |
304 | if (debug) |
305 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
306 | WriteDOC(datum, docptr, CDSNSlowIO); |
307 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
308 | } | |
309 | ||
310 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
311 | { | |
312 | struct nand_chip *this = mtd->priv; | |
313 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 314 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
315 | u_char ret; |
316 | ||
317 | ReadDOC(docptr, CDSNSlowIO); | |
318 | DoC_Delay(doc, 2); | |
319 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
320 | if (debug) |
321 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
322 | return ret; |
323 | } | |
324 | ||
e0c7d767 | 325 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
326 | { |
327 | struct nand_chip *this = mtd->priv; | |
328 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 329 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 330 | int i; |
e0c7d767 DW |
331 | if (debug) |
332 | printk("writebuf of %d bytes: ", len); | |
333 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
334 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
335 | if (debug && i < 16) | |
336 | printk("%02x ", buf[i]); | |
337 | } | |
e0c7d767 DW |
338 | if (debug) |
339 | printk("\n"); | |
1da177e4 LT |
340 | } |
341 | ||
e0c7d767 | 342 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
343 | { |
344 | struct nand_chip *this = mtd->priv; | |
345 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
346 | void __iomem *docptr = doc->virtadr; |
347 | int i; | |
1da177e4 | 348 | |
e0c7d767 DW |
349 | if (debug) |
350 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 351 | |
e0c7d767 | 352 | for (i = 0; i < len; i++) { |
1da177e4 LT |
353 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
354 | } | |
355 | } | |
356 | ||
e0c7d767 | 357 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
358 | { |
359 | struct nand_chip *this = mtd->priv; | |
360 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
361 | void __iomem *docptr = doc->virtadr; |
362 | int i; | |
1da177e4 | 363 | |
e0c7d767 DW |
364 | if (debug) |
365 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 366 | |
e0c7d767 DW |
367 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
368 | for (i = 0; i < len; i++) { | |
369 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 LT |
370 | } |
371 | } else { | |
e0c7d767 DW |
372 | for (i = 0; i < len; i += 4) { |
373 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
374 | } |
375 | } | |
376 | } | |
377 | ||
e0c7d767 | 378 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
379 | { |
380 | struct nand_chip *this = mtd->priv; | |
381 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 382 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
383 | int i; |
384 | ||
e0c7d767 | 385 | for (i = 0; i < len; i++) |
1da177e4 LT |
386 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
387 | return -EFAULT; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
392 | { | |
393 | struct nand_chip *this = mtd->priv; | |
394 | struct doc_priv *doc = this->priv; | |
395 | uint16_t ret; | |
396 | ||
397 | doc200x_select_chip(mtd, nr); | |
7abd3ef9 TG |
398 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
399 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
400 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
401 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 402 | |
dfd61294 | 403 | /* We cant' use dev_ready here, but at least we wait for the |
61b03bd7 | 404 | * command to complete |
dfd61294 TG |
405 | */ |
406 | udelay(50); | |
61b03bd7 | 407 | |
1da177e4 LT |
408 | ret = this->read_byte(mtd) << 8; |
409 | ret |= this->read_byte(mtd); | |
410 | ||
411 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
412 | /* First chip probe. See if we get same results by 32-bit access */ | |
413 | union { | |
414 | uint32_t dword; | |
415 | uint8_t byte[4]; | |
416 | } ident; | |
417 | void __iomem *docptr = doc->virtadr; | |
418 | ||
7abd3ef9 TG |
419 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
420 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
421 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
422 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
423 | NAND_NCE | NAND_CTRL_CHANGE); | |
1da177e4 | 424 | |
dfd61294 TG |
425 | udelay(50); |
426 | ||
1da177e4 LT |
427 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
428 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
429 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
430 | this->read_buf = &doc2000_readbuf_dword; | |
431 | } | |
432 | } | |
61b03bd7 | 433 | |
1da177e4 LT |
434 | return ret; |
435 | } | |
436 | ||
437 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
438 | { | |
439 | struct nand_chip *this = mtd->priv; | |
440 | struct doc_priv *doc = this->priv; | |
441 | uint16_t mfrid; | |
442 | int i; | |
443 | ||
444 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
445 | doc->chips_per_floor = 4; | |
446 | ||
447 | /* Find out what the first chip is */ | |
448 | mfrid = doc200x_ident_chip(mtd, 0); | |
449 | ||
450 | /* Find how many chips in each floor. */ | |
451 | for (i = 1; i < 4; i++) { | |
452 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
453 | break; | |
454 | } | |
455 | doc->chips_per_floor = i; | |
456 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
457 | } | |
458 | ||
7bc3312b | 459 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 LT |
460 | { |
461 | struct doc_priv *doc = this->priv; | |
462 | ||
463 | int status; | |
61b03bd7 | 464 | |
1da177e4 LT |
465 | DoC_WaitReady(doc); |
466 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
467 | DoC_WaitReady(doc); | |
468 | status = (int)this->read_byte(mtd); | |
469 | ||
470 | return status; | |
471 | } | |
472 | ||
473 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
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 | WriteDOC(datum, docptr, CDSNSlowIO); | |
480 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
481 | WriteDOC(datum, docptr, WritePipeTerm); | |
482 | } | |
483 | ||
484 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
485 | { | |
486 | struct nand_chip *this = mtd->priv; | |
487 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 488 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
489 | |
490 | //ReadDOC(docptr, CDSNSlowIO); | |
491 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
492 | DoC_Delay(doc, 2); | |
493 | ReadDOC(docptr, ReadPipeInit); | |
494 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
495 | return ReadDOC(docptr, LastDataRead); | |
496 | } | |
497 | ||
e0c7d767 | 498 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
499 | { |
500 | struct nand_chip *this = mtd->priv; | |
501 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 502 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
503 | int i; |
504 | ||
e0c7d767 | 505 | for (i = 0; i < len; i++) |
1da177e4 LT |
506 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
507 | /* Terminate write pipeline */ | |
508 | WriteDOC(0x00, docptr, WritePipeTerm); | |
509 | } | |
510 | ||
e0c7d767 | 511 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
512 | { |
513 | struct nand_chip *this = mtd->priv; | |
514 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 515 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
516 | int i; |
517 | ||
518 | /* Start read pipeline */ | |
519 | ReadDOC(docptr, ReadPipeInit); | |
520 | ||
e0c7d767 | 521 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
522 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
523 | ||
524 | /* Terminate read pipeline */ | |
525 | buf[i] = ReadDOC(docptr, LastDataRead); | |
526 | } | |
527 | ||
e0c7d767 | 528 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
529 | { |
530 | struct nand_chip *this = mtd->priv; | |
531 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 532 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
533 | int i; |
534 | ||
535 | /* Start read pipeline */ | |
536 | ReadDOC(docptr, ReadPipeInit); | |
537 | ||
e0c7d767 | 538 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
539 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
540 | ReadDOC(docptr, LastDataRead); | |
541 | return i; | |
542 | } | |
543 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
544 | return i; | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
549 | { | |
550 | struct nand_chip *this = mtd->priv; | |
551 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 552 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
553 | u_char ret; |
554 | ||
e0c7d767 DW |
555 | ReadDOC(docptr, Mplus_ReadPipeInit); |
556 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
557 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
558 | if (debug) | |
559 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
560 | return ret; |
561 | } | |
562 | ||
e0c7d767 | 563 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
564 | { |
565 | struct nand_chip *this = mtd->priv; | |
566 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 567 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
568 | int i; |
569 | ||
e0c7d767 DW |
570 | if (debug) |
571 | printk("writebuf of %d bytes: ", len); | |
572 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
573 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
574 | if (debug && i < 16) | |
575 | printk("%02x ", buf[i]); | |
576 | } | |
e0c7d767 DW |
577 | if (debug) |
578 | printk("\n"); | |
1da177e4 LT |
579 | } |
580 | ||
e0c7d767 | 581 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
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 i; |
587 | ||
e0c7d767 DW |
588 | if (debug) |
589 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
590 | |
591 | /* Start read pipeline */ | |
592 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
593 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
594 | ||
e0c7d767 | 595 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
596 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
597 | if (debug && i < 16) | |
598 | printk("%02x ", buf[i]); | |
599 | } | |
600 | ||
601 | /* Terminate read pipeline */ | |
e0c7d767 | 602 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 603 | if (debug && i < 16) |
e0c7d767 DW |
604 | printk("%02x ", buf[len - 2]); |
605 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 606 | if (debug && i < 16) |
e0c7d767 DW |
607 | printk("%02x ", buf[len - 1]); |
608 | if (debug) | |
609 | printk("\n"); | |
1da177e4 LT |
610 | } |
611 | ||
e0c7d767 | 612 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
613 | { |
614 | struct nand_chip *this = mtd->priv; | |
615 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 616 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
617 | int i; |
618 | ||
e0c7d767 DW |
619 | if (debug) |
620 | printk("verifybuf of %d bytes: ", len); | |
1da177e4 LT |
621 | |
622 | /* Start read pipeline */ | |
623 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
624 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
625 | ||
e0c7d767 | 626 | for (i = 0; i < len - 2; i++) |
1da177e4 LT |
627 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
628 | ReadDOC(docptr, Mplus_LastDataRead); | |
629 | ReadDOC(docptr, Mplus_LastDataRead); | |
630 | return i; | |
631 | } | |
e0c7d767 DW |
632 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
633 | return len - 2; | |
634 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
635 | return len - 1; | |
1da177e4 LT |
636 | return 0; |
637 | } | |
638 | ||
639 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
640 | { | |
641 | struct nand_chip *this = mtd->priv; | |
642 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 643 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
644 | int floor = 0; |
645 | ||
e0c7d767 DW |
646 | if (debug) |
647 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
648 | |
649 | if (chip == -1) { | |
650 | /* Disable flash internally */ | |
651 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
652 | return; | |
653 | } | |
654 | ||
655 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 656 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
657 | |
658 | /* Assert ChipEnable and deassert WriteProtect */ | |
659 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
660 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
661 | ||
662 | doc->curchip = chip; | |
663 | doc->curfloor = floor; | |
664 | } | |
665 | ||
666 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
667 | { | |
668 | struct nand_chip *this = mtd->priv; | |
669 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 670 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
671 | int floor = 0; |
672 | ||
e0c7d767 DW |
673 | if (debug) |
674 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
675 | |
676 | if (chip == -1) | |
677 | return; | |
678 | ||
679 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 680 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
681 | |
682 | /* 11.4.4 -- deassert CE before changing chip */ | |
7abd3ef9 | 683 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
684 | |
685 | WriteDOC(floor, docptr, FloorSelect); | |
686 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
687 | ||
7abd3ef9 | 688 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
689 | |
690 | doc->curchip = chip; | |
691 | doc->curfloor = floor; | |
692 | } | |
693 | ||
7abd3ef9 TG |
694 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
695 | ||
696 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
697 | unsigned int ctrl) | |
1da177e4 LT |
698 | { |
699 | struct nand_chip *this = mtd->priv; | |
700 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 701 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 702 | |
7abd3ef9 TG |
703 | if (ctrl & NAND_CTRL_CHANGE) { |
704 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
705 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
706 | if (debug) | |
707 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
708 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
709 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
710 | DoC_Delay(doc, 4); | |
1da177e4 | 711 | } |
cad74f2c TG |
712 | if (cmd != NAND_CMD_NONE) { |
713 | if (DoC_is_2000(doc)) | |
714 | doc2000_write_byte(mtd, cmd); | |
715 | else | |
716 | doc2001_write_byte(mtd, cmd); | |
717 | } | |
1da177e4 LT |
718 | } |
719 | ||
e0c7d767 | 720 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
721 | { |
722 | struct nand_chip *this = mtd->priv; | |
723 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 724 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
725 | |
726 | /* | |
727 | * Must terminate write pipeline before sending any commands | |
728 | * to the device. | |
729 | */ | |
730 | if (command == NAND_CMD_PAGEPROG) { | |
731 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
732 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
733 | } | |
734 | ||
735 | /* | |
736 | * Write out the command to the device. | |
737 | */ | |
738 | if (command == NAND_CMD_SEQIN) { | |
739 | int readcmd; | |
740 | ||
28318776 | 741 | if (column >= mtd->writesize) { |
1da177e4 | 742 | /* OOB area */ |
28318776 | 743 | column -= mtd->writesize; |
1da177e4 LT |
744 | readcmd = NAND_CMD_READOOB; |
745 | } else if (column < 256) { | |
746 | /* First 256 bytes --> READ0 */ | |
747 | readcmd = NAND_CMD_READ0; | |
748 | } else { | |
749 | column -= 256; | |
750 | readcmd = NAND_CMD_READ1; | |
751 | } | |
752 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
753 | } | |
754 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
755 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
756 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
757 | ||
758 | if (column != -1 || page_addr != -1) { | |
759 | /* Serially input address */ | |
760 | if (column != -1) { | |
761 | /* Adjust columns for 16 bit buswidth */ | |
762 | if (this->options & NAND_BUSWIDTH_16) | |
763 | column >>= 1; | |
764 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
765 | } | |
766 | if (page_addr != -1) { | |
e0c7d767 DW |
767 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
768 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
769 | /* One more address cycle for higher density devices */ |
770 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 771 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
772 | printk("high density\n"); |
773 | } | |
774 | } | |
775 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
776 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
777 | /* deassert ALE */ | |
e0c7d767 DW |
778 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
779 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
780 | WriteDOC(0, docptr, Mplus_FlashControl); |
781 | } | |
782 | ||
61b03bd7 | 783 | /* |
1da177e4 LT |
784 | * program and erase have their own busy handlers |
785 | * status and sequential in needs no delay | |
e0c7d767 | 786 | */ |
1da177e4 LT |
787 | switch (command) { |
788 | ||
789 | case NAND_CMD_PAGEPROG: | |
790 | case NAND_CMD_ERASE1: | |
791 | case NAND_CMD_ERASE2: | |
792 | case NAND_CMD_SEQIN: | |
793 | case NAND_CMD_STATUS: | |
794 | return; | |
795 | ||
796 | case NAND_CMD_RESET: | |
797 | if (this->dev_ready) | |
798 | break; | |
799 | udelay(this->chip_delay); | |
800 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
801 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
802 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 803 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
804 | return; |
805 | ||
e0c7d767 | 806 | /* This applies to read commands */ |
1da177e4 | 807 | default: |
61b03bd7 | 808 | /* |
1da177e4 LT |
809 | * If we don't have access to the busy pin, we apply the given |
810 | * command delay | |
e0c7d767 | 811 | */ |
1da177e4 | 812 | if (!this->dev_ready) { |
e0c7d767 | 813 | udelay(this->chip_delay); |
1da177e4 LT |
814 | return; |
815 | } | |
816 | } | |
817 | ||
818 | /* Apply this short delay always to ensure that we do wait tWB in | |
819 | * any case on any machine. */ | |
e0c7d767 | 820 | ndelay(100); |
1da177e4 | 821 | /* wait until command is processed */ |
e0c7d767 | 822 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
823 | } |
824 | ||
825 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
826 | { | |
827 | struct nand_chip *this = mtd->priv; | |
828 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 829 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
830 | |
831 | if (DoC_is_MillenniumPlus(doc)) { | |
832 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
833 | DoC_Delay(doc, 4); | |
834 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 835 | if (debug) |
1da177e4 LT |
836 | printk("not ready\n"); |
837 | return 0; | |
838 | } | |
e0c7d767 DW |
839 | if (debug) |
840 | printk("was ready\n"); | |
1da177e4 LT |
841 | return 1; |
842 | } else { | |
843 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
844 | DoC_Delay(doc, 4); | |
845 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 846 | if (debug) |
1da177e4 LT |
847 | printk("not ready\n"); |
848 | return 0; | |
849 | } | |
850 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
851 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
852 | if (debug) |
853 | printk("was ready\n"); | |
1da177e4 LT |
854 | return 1; |
855 | } | |
856 | } | |
857 | ||
858 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
859 | { | |
860 | /* This is our last resort if we couldn't find or create a BBT. Just | |
861 | pretend all blocks are good. */ | |
862 | return 0; | |
863 | } | |
864 | ||
865 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
866 | { | |
867 | struct nand_chip *this = mtd->priv; | |
868 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 869 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
870 | |
871 | /* Prime the ECC engine */ | |
e0c7d767 | 872 | switch (mode) { |
1da177e4 LT |
873 | case NAND_ECC_READ: |
874 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
875 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
876 | break; | |
877 | case NAND_ECC_WRITE: | |
878 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
879 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
880 | break; | |
881 | } | |
882 | } | |
883 | ||
884 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
885 | { | |
886 | struct nand_chip *this = mtd->priv; | |
887 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 888 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
889 | |
890 | /* Prime the ECC engine */ | |
e0c7d767 | 891 | switch (mode) { |
1da177e4 LT |
892 | case NAND_ECC_READ: |
893 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
894 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
895 | break; | |
896 | case NAND_ECC_WRITE: | |
897 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
898 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
899 | break; | |
900 | } | |
901 | } | |
902 | ||
903 | /* This code is only called on write */ | |
e0c7d767 | 904 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 LT |
905 | { |
906 | struct nand_chip *this = mtd->priv; | |
907 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 908 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
909 | int i; |
910 | int emptymatch = 1; | |
911 | ||
912 | /* flush the pipeline */ | |
913 | if (DoC_is_2000(doc)) { | |
914 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
915 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
916 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
917 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
918 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
919 | } else if (DoC_is_MillenniumPlus(doc)) { | |
920 | WriteDOC(0, docptr, Mplus_NOP); | |
921 | WriteDOC(0, docptr, Mplus_NOP); | |
922 | WriteDOC(0, docptr, Mplus_NOP); | |
923 | } else { | |
924 | WriteDOC(0, docptr, NOP); | |
925 | WriteDOC(0, docptr, NOP); | |
926 | WriteDOC(0, docptr, NOP); | |
927 | } | |
928 | ||
929 | for (i = 0; i < 6; i++) { | |
930 | if (DoC_is_MillenniumPlus(doc)) | |
931 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 932 | else |
1da177e4 LT |
933 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
934 | if (ecc_code[i] != empty_write_ecc[i]) | |
935 | emptymatch = 0; | |
936 | } | |
937 | if (DoC_is_MillenniumPlus(doc)) | |
938 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
939 | else | |
940 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
941 | #if 0 | |
942 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
943 | if (emptymatch) { | |
944 | /* Note: this somewhat expensive test should not be triggered | |
945 | often. It could be optimized away by examining the data in | |
946 | the writebuf routine, and remembering the result. */ | |
947 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
948 | if (dat[i] == 0xff) |
949 | continue; | |
1da177e4 LT |
950 | emptymatch = 0; |
951 | break; | |
952 | } | |
953 | } | |
954 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
955 | Return all-0xff ecc value instead of the computed one, so | |
956 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
957 | if (emptymatch) |
958 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
959 | #endif |
960 | return 0; | |
961 | } | |
962 | ||
f5bbdacc TG |
963 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
964 | u_char *read_ecc, u_char *isnull) | |
1da177e4 LT |
965 | { |
966 | int i, ret = 0; | |
967 | struct nand_chip *this = mtd->priv; | |
968 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 969 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 970 | uint8_t calc_ecc[6]; |
1da177e4 LT |
971 | volatile u_char dummy; |
972 | int emptymatch = 1; | |
61b03bd7 | 973 | |
1da177e4 LT |
974 | /* flush the pipeline */ |
975 | if (DoC_is_2000(doc)) { | |
976 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
977 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
978 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
979 | } else if (DoC_is_MillenniumPlus(doc)) { | |
980 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
981 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
982 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
983 | } else { | |
984 | dummy = ReadDOC(docptr, ECCConf); | |
985 | dummy = ReadDOC(docptr, ECCConf); | |
986 | dummy = ReadDOC(docptr, ECCConf); | |
987 | } | |
61b03bd7 | 988 | |
1da177e4 LT |
989 | /* Error occured ? */ |
990 | if (dummy & 0x80) { | |
991 | for (i = 0; i < 6; i++) { | |
992 | if (DoC_is_MillenniumPlus(doc)) | |
993 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
994 | else | |
995 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
996 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
997 | emptymatch = 0; | |
998 | } | |
999 | /* If emptymatch=1, the read syndrome is consistent with an | |
1000 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1001 | if (emptymatch) { | |
1002 | for (i = 0; i < 6; i++) { | |
e0c7d767 DW |
1003 | if (read_ecc[i] == 0xff) |
1004 | continue; | |
1da177e4 LT |
1005 | emptymatch = 0; |
1006 | break; | |
1007 | } | |
1008 | } | |
1009 | /* If emptymatch still =1, check the data block. */ | |
1010 | if (emptymatch) { | |
e0c7d767 DW |
1011 | /* Note: this somewhat expensive test should not be triggered |
1012 | often. It could be optimized away by examining the data in | |
1013 | the readbuf routine, and remembering the result. */ | |
1da177e4 | 1014 | for (i = 0; i < 512; i++) { |
e0c7d767 DW |
1015 | if (dat[i] == 0xff) |
1016 | continue; | |
1da177e4 LT |
1017 | emptymatch = 0; |
1018 | break; | |
1019 | } | |
1020 | } | |
1021 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1022 | erased block, in which case the ECC will not come out right. | |
1023 | We'll suppress the error and tell the caller everything's | |
1024 | OK. Because it is. */ | |
e0c7d767 DW |
1025 | if (!emptymatch) |
1026 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
1027 | if (ret > 0) |
1028 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 1029 | } |
1da177e4 LT |
1030 | if (DoC_is_MillenniumPlus(doc)) |
1031 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1032 | else | |
1033 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
eb684507 | 1034 | if (no_ecc_failures && (ret == -EBADMSG)) { |
1da177e4 LT |
1035 | printk(KERN_ERR "suppressing ECC failure\n"); |
1036 | ret = 0; | |
1037 | } | |
1038 | return ret; | |
1039 | } | |
61b03bd7 | 1040 | |
1da177e4 LT |
1041 | //u_char mydatabuf[528]; |
1042 | ||
abc37e67 DB |
1043 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
1044 | * attempt to retain compatibility. It used to read: | |
1045 | * .oobfree = { {8, 8} } | |
1046 | * Since that leaves two bytes unusable, it was changed. But the following | |
1047 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1048 | * .oobfree = { {6, 10} } | |
1049 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1050 | * safer. The only problem with it is that any code that parses oobfree must | |
1051 | * be able to handle out-of-order segments. | |
1052 | */ | |
5bd34c09 | 1053 | static struct nand_ecclayout doc200x_oobinfo = { |
e0c7d767 DW |
1054 | .eccbytes = 6, |
1055 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
1056 | .oobfree = {{8, 8}, {6, 2}} | |
1da177e4 | 1057 | }; |
61b03bd7 | 1058 | |
1da177e4 | 1059 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
af901ca1 | 1060 | On successful return, buf will contain a copy of the media header for |
1da177e4 LT |
1061 | further processing. id is the string to scan for, and will presumably be |
1062 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1063 | header. The page #s of the found media headers are placed in mh0_page and | |
1064 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1065 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 LT |
1066 | { |
1067 | struct nand_chip *this = mtd->priv; | |
1068 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1069 | unsigned offs; |
1da177e4 LT |
1070 | int ret; |
1071 | size_t retlen; | |
1072 | ||
1a78ff6b | 1073 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
28318776 JE |
1074 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1075 | if (retlen != mtd->writesize) | |
e0c7d767 | 1076 | continue; |
1da177e4 | 1077 | if (ret) { |
e0c7d767 | 1078 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1079 | } |
e0c7d767 DW |
1080 | if (memcmp(buf, id, 6)) |
1081 | continue; | |
1da177e4 LT |
1082 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1083 | if (doc->mh0_page == -1) { | |
1084 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1085 | if (!findmirror) |
1086 | return 1; | |
1da177e4 LT |
1087 | continue; |
1088 | } | |
1089 | doc->mh1_page = offs >> this->page_shift; | |
1090 | return 2; | |
1091 | } | |
1092 | if (doc->mh0_page == -1) { | |
1093 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1094 | return 0; | |
1095 | } | |
1096 | /* Only one mediaheader was found. We want buf to contain a | |
1097 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1098 | offs = doc->mh0_page << this->page_shift; | |
28318776 JE |
1099 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1100 | if (retlen != mtd->writesize) { | |
1da177e4 LT |
1101 | /* Insanity. Give up. */ |
1102 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1103 | return 0; | |
1104 | } | |
1105 | return 1; | |
1106 | } | |
1107 | ||
e0c7d767 | 1108 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1109 | { |
1110 | struct nand_chip *this = mtd->priv; | |
1111 | struct doc_priv *doc = this->priv; | |
1112 | int ret = 0; | |
1113 | u_char *buf; | |
1114 | struct NFTLMediaHeader *mh; | |
1115 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1116 | int numparts = 0; |
1da177e4 LT |
1117 | unsigned blocks, maxblocks; |
1118 | int offs, numheaders; | |
1119 | ||
28318776 | 1120 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1121 | if (!buf) { |
1122 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1123 | return 0; | |
1124 | } | |
e0c7d767 DW |
1125 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1126 | goto out; | |
1127 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1128 | |
96372446 HH |
1129 | le16_to_cpus(&mh->NumEraseUnits); |
1130 | le16_to_cpus(&mh->FirstPhysicalEUN); | |
1131 | le32_to_cpus(&mh->FormattedSize); | |
f29a4b86 | 1132 | |
1da177e4 LT |
1133 | printk(KERN_INFO " DataOrgID = %s\n" |
1134 | " NumEraseUnits = %d\n" | |
1135 | " FirstPhysicalEUN = %d\n" | |
1136 | " FormattedSize = %d\n" | |
1137 | " UnitSizeFactor = %d\n", | |
1138 | mh->DataOrgID, mh->NumEraseUnits, | |
1139 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1140 | mh->UnitSizeFactor); | |
1da177e4 LT |
1141 | |
1142 | blocks = mtd->size >> this->phys_erase_shift; | |
1143 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1144 | ||
1145 | if (mh->UnitSizeFactor == 0x00) { | |
1146 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1147 | - There can be at most 32768 virtual blocks. | |
1148 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1149 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1150 | */ | |
1da177e4 LT |
1151 | mh->UnitSizeFactor = 0xff; |
1152 | while (blocks > maxblocks) { | |
1153 | blocks >>= 1; | |
1154 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1155 | mh->UnitSizeFactor--; | |
1156 | } | |
1157 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1158 | } | |
1159 | ||
1160 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1161 | layers; variables with have already been configured by nand_scan. | |
1162 | Unfortunately, we didn't know before this point what these values | |
1163 | should be. Thus, this code is somewhat dependant on the exact | |
1164 | implementation of the NAND layer. */ | |
1165 | if (mh->UnitSizeFactor != 0xff) { | |
1166 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1167 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1168 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1169 | blocks = mtd->size >> this->bbt_erase_shift; | |
1170 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1171 | } | |
1172 | ||
1173 | if (blocks > maxblocks) { | |
1174 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1175 | goto out; | |
1176 | } | |
1177 | ||
1178 | /* Skip past the media headers. */ | |
1179 | offs = max(doc->mh0_page, doc->mh1_page); | |
1180 | offs <<= this->page_shift; | |
1181 | offs += mtd->erasesize; | |
1182 | ||
1a78ff6b DB |
1183 | if (show_firmware_partition == 1) { |
1184 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1185 | parts[0].offset = 0; | |
1186 | parts[0].size = offs; | |
1187 | numparts = 1; | |
1188 | } | |
1189 | ||
1190 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1191 | parts[numparts].offset = offs; | |
1192 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1193 | ||
1194 | offs += parts[numparts].size; | |
1195 | numparts++; | |
1da177e4 | 1196 | |
1da177e4 | 1197 | if (offs < mtd->size) { |
1a78ff6b DB |
1198 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1199 | parts[numparts].offset = offs; | |
1200 | parts[numparts].size = mtd->size - offs; | |
1201 | numparts++; | |
1da177e4 | 1202 | } |
1a78ff6b DB |
1203 | |
1204 | ret = numparts; | |
e0c7d767 | 1205 | out: |
1da177e4 LT |
1206 | kfree(buf); |
1207 | return ret; | |
1208 | } | |
1209 | ||
1210 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1211 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1212 | { |
1213 | struct nand_chip *this = mtd->priv; | |
1214 | struct doc_priv *doc = this->priv; | |
1215 | int ret = 0; | |
1216 | u_char *buf; | |
1217 | struct INFTLMediaHeader *mh; | |
1218 | struct INFTLPartition *ip; | |
1219 | int numparts = 0; | |
1220 | int blocks; | |
1221 | int vshift, lastvunit = 0; | |
1222 | int i; | |
1223 | int end = mtd->size; | |
1224 | ||
1225 | if (inftl_bbt_write) | |
1226 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1227 | ||
28318776 | 1228 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1229 | if (!buf) { |
1230 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1231 | return 0; | |
1232 | } | |
1233 | ||
e0c7d767 DW |
1234 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1235 | goto out; | |
1da177e4 | 1236 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1237 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 | 1238 | |
96372446 HH |
1239 | le32_to_cpus(&mh->NoOfBootImageBlocks); |
1240 | le32_to_cpus(&mh->NoOfBinaryPartitions); | |
1241 | le32_to_cpus(&mh->NoOfBDTLPartitions); | |
1242 | le32_to_cpus(&mh->BlockMultiplierBits); | |
1243 | le32_to_cpus(&mh->FormatFlags); | |
1244 | le32_to_cpus(&mh->PercentUsed); | |
61b03bd7 | 1245 | |
1da177e4 LT |
1246 | printk(KERN_INFO " bootRecordID = %s\n" |
1247 | " NoOfBootImageBlocks = %d\n" | |
1248 | " NoOfBinaryPartitions = %d\n" | |
1249 | " NoOfBDTLPartitions = %d\n" | |
1250 | " BlockMultiplerBits = %d\n" | |
1251 | " FormatFlgs = %d\n" | |
1252 | " OsakVersion = %d.%d.%d.%d\n" | |
1253 | " PercentUsed = %d\n", | |
1254 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1255 | mh->NoOfBinaryPartitions, | |
1256 | mh->NoOfBDTLPartitions, | |
1257 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1258 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1259 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1260 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1261 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1262 | mh->PercentUsed); | |
1da177e4 LT |
1263 | |
1264 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1265 | ||
1266 | blocks = mtd->size >> vshift; | |
1267 | if (blocks > 32768) { | |
1268 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1269 | goto out; | |
1270 | } | |
1271 | ||
1272 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1273 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1274 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1275 | goto out; | |
1276 | } | |
1277 | ||
1278 | /* Scan the partitions */ | |
1279 | for (i = 0; (i < 4); i++) { | |
1280 | ip = &(mh->Partitions[i]); | |
96372446 HH |
1281 | le32_to_cpus(&ip->virtualUnits); |
1282 | le32_to_cpus(&ip->firstUnit); | |
1283 | le32_to_cpus(&ip->lastUnit); | |
1284 | le32_to_cpus(&ip->flags); | |
1285 | le32_to_cpus(&ip->spareUnits); | |
1286 | le32_to_cpus(&ip->Reserved0); | |
1da177e4 | 1287 | |
1da177e4 LT |
1288 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1289 | " virtualUnits = %d\n" | |
1290 | " firstUnit = %d\n" | |
1291 | " lastUnit = %d\n" | |
1292 | " flags = 0x%x\n" | |
1293 | " spareUnits = %d\n", | |
1294 | i, ip->virtualUnits, ip->firstUnit, | |
1295 | ip->lastUnit, ip->flags, | |
1296 | ip->spareUnits); | |
1da177e4 | 1297 | |
1a78ff6b DB |
1298 | if ((show_firmware_partition == 1) && |
1299 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1300 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1301 | parts[0].offset = 0; | |
1302 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1303 | numparts = 1; | |
1304 | } | |
1da177e4 LT |
1305 | |
1306 | if (ip->flags & INFTL_BINARY) | |
1307 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1308 | else | |
1309 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1310 | parts[numparts].offset = ip->firstUnit << vshift; | |
1311 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1312 | numparts++; | |
e0c7d767 DW |
1313 | if (ip->lastUnit > lastvunit) |
1314 | lastvunit = ip->lastUnit; | |
1315 | if (ip->flags & INFTL_LAST) | |
1316 | break; | |
1da177e4 LT |
1317 | } |
1318 | lastvunit++; | |
1319 | if ((lastvunit << vshift) < end) { | |
1320 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1321 | parts[numparts].offset = lastvunit << vshift; | |
1322 | parts[numparts].size = end - parts[numparts].offset; | |
1323 | numparts++; | |
1324 | } | |
1325 | ret = numparts; | |
e0c7d767 | 1326 | out: |
1da177e4 LT |
1327 | kfree(buf); |
1328 | return ret; | |
1329 | } | |
1330 | ||
1331 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1332 | { | |
1333 | int ret, numparts; | |
1334 | struct nand_chip *this = mtd->priv; | |
1335 | struct doc_priv *doc = this->priv; | |
1336 | struct mtd_partition parts[2]; | |
1337 | ||
e0c7d767 | 1338 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1339 | /* On NFTL, we have to find the media headers before we can read the |
1340 | BBTs, since they're stored in the media header eraseblocks. */ | |
1341 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1342 | if (!numparts) |
1343 | return -EIO; | |
1da177e4 LT |
1344 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1345 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1346 | NAND_BBT_VERSION; | |
1347 | this->bbt_td->veroffs = 7; | |
1348 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1349 | if (doc->mh1_page != -1) { | |
1350 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1351 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1352 | NAND_BBT_VERSION; | |
1353 | this->bbt_md->veroffs = 7; | |
1354 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1355 | } else { | |
1356 | this->bbt_md = NULL; | |
1357 | } | |
1358 | ||
1359 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1360 | At least as nand_bbt.c is currently written. */ | |
1361 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1362 | return ret; | |
1363 | add_mtd_device(mtd); | |
1364 | #ifdef CONFIG_MTD_PARTITIONS | |
1365 | if (!no_autopart) | |
1366 | add_mtd_partitions(mtd, parts, numparts); | |
1367 | #endif | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1372 | { | |
1373 | int ret, numparts; | |
1374 | struct nand_chip *this = mtd->priv; | |
1375 | struct doc_priv *doc = this->priv; | |
1376 | struct mtd_partition parts[5]; | |
1377 | ||
1378 | if (this->numchips > doc->chips_per_floor) { | |
1379 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1380 | return -EIO; | |
1381 | } | |
1382 | ||
1383 | if (DoC_is_MillenniumPlus(doc)) { | |
1384 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1385 | if (inftl_bbt_write) | |
1386 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1387 | this->bbt_td->pages[0] = 2; | |
1388 | this->bbt_md = NULL; | |
1389 | } else { | |
e0c7d767 | 1390 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1391 | if (inftl_bbt_write) |
1392 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1393 | this->bbt_td->offs = 8; | |
1394 | this->bbt_td->len = 8; | |
1395 | this->bbt_td->veroffs = 7; | |
1396 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1397 | this->bbt_td->reserved_block_code = 0x01; | |
1398 | this->bbt_td->pattern = "MSYS_BBT"; | |
1399 | ||
e0c7d767 | 1400 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1401 | if (inftl_bbt_write) |
1402 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1403 | this->bbt_md->offs = 8; | |
1404 | this->bbt_md->len = 8; | |
1405 | this->bbt_md->veroffs = 7; | |
1406 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1407 | this->bbt_md->reserved_block_code = 0x01; | |
1408 | this->bbt_md->pattern = "TBB_SYSM"; | |
1409 | } | |
1410 | ||
1411 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1412 | At least as nand_bbt.c is currently written. */ | |
1413 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1414 | return ret; | |
e0c7d767 | 1415 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1416 | numparts = inftl_partscan(mtd, parts); |
1417 | /* At least for now, require the INFTL Media Header. We could probably | |
1418 | do without it for non-INFTL use, since all it gives us is | |
1419 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1420 | if (!numparts) |
1421 | return -EIO; | |
1da177e4 LT |
1422 | add_mtd_device(mtd); |
1423 | #ifdef CONFIG_MTD_PARTITIONS | |
1424 | if (!no_autopart) | |
1425 | add_mtd_partitions(mtd, parts, numparts); | |
1426 | #endif | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1431 | { | |
1432 | struct nand_chip *this = mtd->priv; | |
1433 | struct doc_priv *doc = this->priv; | |
1434 | ||
1da177e4 LT |
1435 | this->read_byte = doc2000_read_byte; |
1436 | this->write_buf = doc2000_writebuf; | |
1437 | this->read_buf = doc2000_readbuf; | |
1438 | this->verify_buf = doc2000_verifybuf; | |
1439 | this->scan_bbt = nftl_scan_bbt; | |
1440 | ||
1441 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1442 | doc2000_count_chips(mtd); | |
1443 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1444 | return (4 * doc->chips_per_floor); | |
1445 | } | |
1446 | ||
1447 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1448 | { | |
1449 | struct nand_chip *this = mtd->priv; | |
1450 | struct doc_priv *doc = this->priv; | |
1451 | ||
1da177e4 LT |
1452 | this->read_byte = doc2001_read_byte; |
1453 | this->write_buf = doc2001_writebuf; | |
1454 | this->read_buf = doc2001_readbuf; | |
1455 | this->verify_buf = doc2001_verifybuf; | |
1456 | ||
1457 | ReadDOC(doc->virtadr, ChipID); | |
1458 | ReadDOC(doc->virtadr, ChipID); | |
1459 | ReadDOC(doc->virtadr, ChipID); | |
1460 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1461 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1462 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1463 | Treat it like a Millennium, except that it |
1464 | can have multiple chips. */ | |
1465 | doc2000_count_chips(mtd); | |
1466 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1467 | this->scan_bbt = inftl_scan_bbt; | |
1468 | return (4 * doc->chips_per_floor); | |
1469 | } else { | |
1470 | /* Bog-standard Millennium */ | |
1471 | doc->chips_per_floor = 1; | |
1472 | mtd->name = "DiskOnChip Millennium"; | |
1473 | this->scan_bbt = nftl_scan_bbt; | |
1474 | return 1; | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1479 | { | |
1480 | struct nand_chip *this = mtd->priv; | |
1481 | struct doc_priv *doc = this->priv; | |
1482 | ||
1da177e4 LT |
1483 | this->read_byte = doc2001plus_read_byte; |
1484 | this->write_buf = doc2001plus_writebuf; | |
1485 | this->read_buf = doc2001plus_readbuf; | |
1486 | this->verify_buf = doc2001plus_verifybuf; | |
1487 | this->scan_bbt = inftl_scan_bbt; | |
7abd3ef9 | 1488 | this->cmd_ctrl = NULL; |
1da177e4 LT |
1489 | this->select_chip = doc2001plus_select_chip; |
1490 | this->cmdfunc = doc2001plus_command; | |
0cddd6c2 | 1491 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1492 | |
1493 | doc->chips_per_floor = 1; | |
1494 | mtd->name = "DiskOnChip Millennium Plus"; | |
1495 | ||
1496 | return 1; | |
1497 | } | |
1498 | ||
858119e1 | 1499 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1500 | { |
1501 | unsigned char ChipID; | |
1502 | struct mtd_info *mtd; | |
1503 | struct nand_chip *nand; | |
1504 | struct doc_priv *doc; | |
1505 | void __iomem *virtadr; | |
1506 | unsigned char save_control; | |
1507 | unsigned char tmp, tmpb, tmpc; | |
1508 | int reg, len, numchips; | |
1509 | int ret = 0; | |
1510 | ||
1511 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1512 | if (!virtadr) { | |
1513 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1514 | return -EIO; | |
1515 | } | |
1516 | ||
1517 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1518 | * bootup procedure will put the device into reset mode, and | |
1519 | * it's not possible to talk to it without actually writing | |
1520 | * to the DOCControl register. So we store the current contents | |
1521 | * of the DOCControl register's location, in case we later decide | |
1522 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1523 | * found it. |
1da177e4 LT |
1524 | */ |
1525 | save_control = ReadDOC(virtadr, DOCControl); | |
1526 | ||
1527 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1528 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1529 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1530 | |
1531 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1532 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1533 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1534 | |
1535 | ChipID = ReadDOC(virtadr, ChipID); | |
1536 | ||
e0c7d767 | 1537 | switch (ChipID) { |
1da177e4 LT |
1538 | case DOC_ChipID_Doc2k: |
1539 | reg = DoC_2k_ECCStatus; | |
1540 | break; | |
1541 | case DOC_ChipID_DocMil: | |
1542 | reg = DoC_ECCConf; | |
1543 | break; | |
1544 | case DOC_ChipID_DocMilPlus16: | |
1545 | case DOC_ChipID_DocMilPlus32: | |
1546 | case 0: | |
1547 | /* Possible Millennium Plus, need to do more checks */ | |
1548 | /* Possibly release from power down mode */ | |
1549 | for (tmp = 0; (tmp < 4); tmp++) | |
1550 | ReadDOC(virtadr, Mplus_Power); | |
1551 | ||
1552 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1553 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1554 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1555 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1556 | ||
1557 | mdelay(1); | |
1558 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1559 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1560 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1561 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1562 | mdelay(1); | |
1563 | ||
1564 | ChipID = ReadDOC(virtadr, ChipID); | |
1565 | ||
1566 | switch (ChipID) { | |
1567 | case DOC_ChipID_DocMilPlus16: | |
1568 | reg = DoC_Mplus_Toggle; | |
1569 | break; | |
1570 | case DOC_ChipID_DocMilPlus32: | |
1571 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1572 | default: | |
1573 | ret = -ENODEV; | |
1574 | goto notfound; | |
1575 | } | |
1576 | break; | |
1577 | ||
1578 | default: | |
1579 | ret = -ENODEV; | |
1580 | goto notfound; | |
1581 | } | |
1582 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1583 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1584 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1585 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1586 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1587 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1588 | ret = -ENODEV; | |
1589 | goto notfound; | |
1590 | } | |
1591 | ||
1592 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1593 | unsigned char oldval; | |
1594 | unsigned char newval; | |
1595 | nand = mtd->priv; | |
1596 | doc = nand->priv; | |
1597 | /* Use the alias resolution register to determine if this is | |
1598 | in fact the same DOC aliased to a new address. If writes | |
1599 | to one chip's alias resolution register change the value on | |
1600 | the other chip, they're the same chip. */ | |
1601 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1602 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1603 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1604 | } else { | |
1605 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1606 | newval = ReadDOC(virtadr, AliasResolution); | |
1607 | } | |
1608 | if (oldval != newval) | |
1609 | continue; | |
1610 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1611 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1612 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1613 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1614 | } else { |
1615 | WriteDOC(~newval, virtadr, AliasResolution); | |
1616 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1617 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1618 | } |
1619 | newval = ~newval; | |
1620 | if (oldval == newval) { | |
1621 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1622 | goto notfound; | |
1623 | } | |
1624 | } | |
1625 | ||
1626 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1627 | ||
1628 | len = sizeof(struct mtd_info) + | |
e0c7d767 | 1629 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
95b93a0c | 1630 | mtd = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1631 | if (!mtd) { |
1632 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1633 | ret = -ENOMEM; | |
1634 | goto fail; | |
1635 | } | |
1da177e4 LT |
1636 | |
1637 | nand = (struct nand_chip *) (mtd + 1); | |
1638 | doc = (struct doc_priv *) (nand + 1); | |
1639 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1640 | nand->bbt_md = nand->bbt_td + 1; | |
1641 | ||
1642 | mtd->priv = nand; | |
1643 | mtd->owner = THIS_MODULE; | |
1644 | ||
1645 | nand->priv = doc; | |
1646 | nand->select_chip = doc200x_select_chip; | |
7abd3ef9 | 1647 | nand->cmd_ctrl = doc200x_hwcontrol; |
1da177e4 LT |
1648 | nand->dev_ready = doc200x_dev_ready; |
1649 | nand->waitfunc = doc200x_wait; | |
1650 | nand->block_bad = doc200x_block_bad; | |
6dfc6d25 TG |
1651 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1652 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1653 | nand->ecc.correct = doc200x_correct_data; | |
1da177e4 | 1654 | |
5bd34c09 | 1655 | nand->ecc.layout = &doc200x_oobinfo; |
6dfc6d25 TG |
1656 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; |
1657 | nand->ecc.size = 512; | |
1658 | nand->ecc.bytes = 6; | |
f75e5097 | 1659 | nand->options = NAND_USE_FLASH_BBT; |
1da177e4 LT |
1660 | |
1661 | doc->physadr = physadr; | |
1662 | doc->virtadr = virtadr; | |
1663 | doc->ChipID = ChipID; | |
1664 | doc->curfloor = -1; | |
1665 | doc->curchip = -1; | |
1666 | doc->mh0_page = -1; | |
1667 | doc->mh1_page = -1; | |
1668 | doc->nextdoc = doclist; | |
1669 | ||
1670 | if (ChipID == DOC_ChipID_Doc2k) | |
1671 | numchips = doc2000_init(mtd); | |
1672 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1673 | numchips = doc2001plus_init(mtd); | |
1674 | else | |
1675 | numchips = doc2001_init(mtd); | |
1676 | ||
1677 | if ((ret = nand_scan(mtd, numchips))) { | |
1678 | /* DBB note: i believe nand_release is necessary here, as | |
1679 | buffers may have been allocated in nand_base. Check with | |
1680 | Thomas. FIX ME! */ | |
1681 | /* nand_release will call del_mtd_device, but we haven't yet | |
1682 | added it. This is handled without incident by | |
1683 | del_mtd_device, as far as I can tell. */ | |
1684 | nand_release(mtd); | |
1685 | kfree(mtd); | |
1686 | goto fail; | |
1687 | } | |
1688 | ||
1689 | /* Success! */ | |
1690 | doclist = mtd; | |
1691 | return 0; | |
1692 | ||
e0c7d767 | 1693 | notfound: |
1da177e4 LT |
1694 | /* Put back the contents of the DOCControl register, in case it's not |
1695 | actually a DiskOnChip. */ | |
1696 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1697 | fail: |
1da177e4 LT |
1698 | iounmap(virtadr); |
1699 | return ret; | |
1700 | } | |
1701 | ||
1702 | static void release_nanddoc(void) | |
1703 | { | |
e0c7d767 | 1704 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1705 | struct nand_chip *nand; |
1706 | struct doc_priv *doc; | |
1707 | ||
1708 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1709 | nand = mtd->priv; | |
1710 | doc = nand->priv; | |
1711 | ||
1712 | nextmtd = doc->nextdoc; | |
1713 | nand_release(mtd); | |
1714 | iounmap(doc->virtadr); | |
1715 | kfree(mtd); | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | static int __init init_nanddoc(void) | |
1720 | { | |
1721 | int i, ret = 0; | |
1722 | ||
1723 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1724 | * This way we have it handy, if an error happens |
1da177e4 LT |
1725 | * |
1726 | * Symbolsize is 10 (bits) | |
1727 | * Primitve polynomial is x^10+x^3+1 | |
1728 | * first consecutive root is 510 | |
1729 | * primitve element to generate roots = 1 | |
1730 | * generator polinomial degree = 4 | |
1731 | */ | |
1732 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1733 | if (!rs_decoder) { |
1734 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1735 | return -ENOMEM; |
1736 | } | |
1737 | ||
1738 | if (doc_config_location) { | |
1739 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1740 | ret = doc_probe(doc_config_location); | |
1741 | if (ret < 0) | |
1742 | goto outerr; | |
1743 | } else { | |
e0c7d767 | 1744 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1745 | doc_probe(doc_locations[i]); |
1746 | } | |
1747 | } | |
1748 | /* No banner message any more. Print a message if no DiskOnChip | |
1749 | found, so the user knows we at least tried. */ | |
1750 | if (!doclist) { | |
1751 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1752 | ret = -ENODEV; | |
1753 | goto outerr; | |
1754 | } | |
1755 | return 0; | |
e0c7d767 | 1756 | outerr: |
1da177e4 LT |
1757 | free_rs(rs_decoder); |
1758 | return ret; | |
1759 | } | |
1760 | ||
1761 | static void __exit cleanup_nanddoc(void) | |
1762 | { | |
1763 | /* Cleanup the nand/DoC resources */ | |
1764 | release_nanddoc(); | |
1765 | ||
1766 | /* Free the reed solomon resources */ | |
1767 | if (rs_decoder) { | |
1768 | free_rs(rs_decoder); | |
1769 | } | |
1770 | } | |
1771 | ||
1772 | module_init(init_nanddoc); | |
1773 | module_exit(cleanup_nanddoc); | |
1774 | ||
1775 | MODULE_LICENSE("GPL"); | |
1776 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
2a7af8ca | 1777 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver"); |