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 LT |
17 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
18 | * | |
61b03bd7 | 19 | * $Id: diskonchip.c,v 1.55 2005/11/07 11:14:30 gleixner Exp $ |
1da177e4 LT |
20 | */ |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/sched.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/rslib.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <asm/io.h> | |
29 | ||
30 | #include <linux/mtd/mtd.h> | |
31 | #include <linux/mtd/nand.h> | |
32 | #include <linux/mtd/doc2000.h> | |
33 | #include <linux/mtd/compatmac.h> | |
34 | #include <linux/mtd/partitions.h> | |
35 | #include <linux/mtd/inftl.h> | |
36 | ||
37 | /* Where to look for the devices? */ | |
651078ba TG |
38 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
39 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
1da177e4 LT |
40 | #endif |
41 | ||
42 | static unsigned long __initdata doc_locations[] = { | |
43 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) | |
651078ba | 44 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
61b03bd7 | 45 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
1da177e4 | 46 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
61b03bd7 TG |
47 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
48 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
1da177e4 LT |
49 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
50 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ | |
61b03bd7 | 51 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
1da177e4 | 52 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
61b03bd7 TG |
53 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
54 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
1da177e4 LT |
55 | 0xe8000, 0xea000, 0xec000, 0xee000, |
56 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ | |
57 | #elif defined(__PPC__) | |
58 | 0xe4000000, | |
e0c7d767 | 59 | #else |
1da177e4 LT |
60 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
61 | #endif | |
62 | 0xffffffff }; | |
63 | ||
64 | static struct mtd_info *doclist = NULL; | |
65 | ||
66 | struct doc_priv { | |
67 | void __iomem *virtadr; | |
68 | unsigned long physadr; | |
69 | u_char ChipID; | |
70 | u_char CDSNControl; | |
e0c7d767 | 71 | int chips_per_floor; /* The number of chips detected on each floor */ |
1da177e4 LT |
72 | int curfloor; |
73 | int curchip; | |
74 | int mh0_page; | |
75 | int mh1_page; | |
76 | struct mtd_info *nextdoc; | |
77 | }; | |
78 | ||
1da177e4 LT |
79 | /* This is the syndrome computed by the HW ecc generator upon reading an empty |
80 | page, one with all 0xff for data and stored ecc code. */ | |
81 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
e0c7d767 | 82 | |
1da177e4 LT |
83 | /* This is the ecc value computed by the HW ecc generator upon writing an empty |
84 | page, one with all 0xff for data. */ | |
85 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
86 | ||
87 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
88 | ||
89 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
90 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
91 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
92 | ||
7abd3ef9 TG |
93 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
94 | unsigned int bitmask); | |
1da177e4 LT |
95 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
96 | ||
e0c7d767 | 97 | static int debug = 0; |
1da177e4 LT |
98 | module_param(debug, int, 0); |
99 | ||
e0c7d767 | 100 | static int try_dword = 1; |
1da177e4 LT |
101 | module_param(try_dword, int, 0); |
102 | ||
e0c7d767 | 103 | static int no_ecc_failures = 0; |
1da177e4 LT |
104 | module_param(no_ecc_failures, int, 0); |
105 | ||
e0c7d767 | 106 | static int no_autopart = 0; |
1da177e4 | 107 | module_param(no_autopart, int, 0); |
1a78ff6b | 108 | |
e0c7d767 | 109 | static int show_firmware_partition = 0; |
1a78ff6b | 110 | module_param(show_firmware_partition, int, 0); |
1da177e4 | 111 | |
89e2bf61 | 112 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE |
e0c7d767 | 113 | static int inftl_bbt_write = 1; |
1da177e4 | 114 | #else |
e0c7d767 | 115 | static int inftl_bbt_write = 0; |
1da177e4 LT |
116 | #endif |
117 | module_param(inftl_bbt_write, int, 0); | |
118 | ||
651078ba | 119 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
120 | module_param(doc_config_location, ulong, 0); |
121 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
122 | ||
1da177e4 LT |
123 | /* Sector size for HW ECC */ |
124 | #define SECTOR_SIZE 512 | |
125 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
126 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
127 | /* Number of roots */ | |
128 | #define NROOTS 4 | |
129 | /* First consective root */ | |
130 | #define FCR 510 | |
131 | /* Number of symbols */ | |
132 | #define NN 1023 | |
133 | ||
134 | /* the Reed Solomon control structure */ | |
135 | static struct rs_control *rs_decoder; | |
136 | ||
61b03bd7 | 137 | /* |
1da177e4 LT |
138 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
139 | * which we must convert to a standard syndrom usable by the generic | |
140 | * Reed-Solomon library code. | |
141 | * | |
142 | * Fabrice Bellard figured this out in the old docecc code. I added | |
143 | * some comments, improved a minor bit and converted it to make use | |
144 | * of the generic Reed-Solomon libary. tglx | |
145 | */ | |
e0c7d767 | 146 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
147 | { |
148 | int i, j, nerr, errpos[8]; | |
149 | uint8_t parity; | |
150 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
151 | ||
152 | /* Convert the ecc bytes into words */ | |
153 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
154 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
155 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
156 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
157 | parity = ecc[1]; | |
158 | ||
159 | /* Initialize the syndrom buffer */ | |
160 | for (i = 0; i < NROOTS; i++) | |
161 | s[i] = ds[0]; | |
61b03bd7 TG |
162 | /* |
163 | * Evaluate | |
1da177e4 LT |
164 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
165 | * where x = alpha^(FCR + i) | |
166 | */ | |
e0c7d767 DW |
167 | for (j = 1; j < NROOTS; j++) { |
168 | if (ds[j] == 0) | |
1da177e4 LT |
169 | continue; |
170 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 171 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
172 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
173 | } | |
174 | ||
175 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
176 | for (i = 0; i < NROOTS; i++) { | |
177 | if (syn[i]) | |
e0c7d767 | 178 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
179 | } |
180 | /* Call the decoder library */ | |
181 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
182 | ||
183 | /* Incorrectable errors ? */ | |
184 | if (nerr < 0) | |
185 | return nerr; | |
186 | ||
61b03bd7 | 187 | /* |
1da177e4 LT |
188 | * Correct the errors. The bitpositions are a bit of magic, |
189 | * but they are given by the design of the de/encoder circuit | |
190 | * in the DoC ASIC's. | |
191 | */ | |
e0c7d767 | 192 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
193 | int index, bitpos, pos = 1015 - errpos[i]; |
194 | uint8_t val; | |
195 | if (pos >= NB_DATA && pos < 1019) | |
196 | continue; | |
197 | if (pos < NB_DATA) { | |
198 | /* extract bit position (MSB first) */ | |
199 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
200 | /* now correct the following 10 bits. At most two bytes | |
201 | can be modified since pos is even */ | |
202 | index = (pos >> 3) ^ 1; | |
203 | bitpos = pos & 7; | |
e0c7d767 | 204 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
205 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
206 | parity ^= val; | |
207 | if (index < SECTOR_SIZE) | |
208 | data[index] ^= val; | |
209 | } | |
210 | index = ((pos >> 3) + 1) ^ 1; | |
211 | bitpos = (bitpos + 10) & 7; | |
212 | if (bitpos == 0) | |
213 | bitpos = 8; | |
e0c7d767 DW |
214 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
215 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
216 | parity ^= val; |
217 | if (index < SECTOR_SIZE) | |
218 | data[index] ^= val; | |
219 | } | |
220 | } | |
221 | } | |
222 | /* If the parity is wrong, no rescue possible */ | |
223 | return parity ? -1 : nerr; | |
224 | } | |
225 | ||
226 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
227 | { | |
228 | volatile char dummy; | |
229 | int i; | |
61b03bd7 | 230 | |
1da177e4 LT |
231 | for (i = 0; i < cycles; i++) { |
232 | if (DoC_is_Millennium(doc)) | |
233 | dummy = ReadDOC(doc->virtadr, NOP); | |
234 | else if (DoC_is_MillenniumPlus(doc)) | |
235 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
236 | else | |
237 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
238 | } | |
61b03bd7 | 239 | |
1da177e4 LT |
240 | } |
241 | ||
242 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
243 | ||
244 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
245 | static int _DoC_WaitReady(struct doc_priv *doc) | |
246 | { | |
e0c7d767 | 247 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
248 | unsigned long timeo = jiffies + (HZ * 10); |
249 | ||
e0c7d767 DW |
250 | if (debug) |
251 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
252 | /* Out-of-line routine to wait for chip response */ |
253 | if (DoC_is_MillenniumPlus(doc)) { | |
254 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
255 | if (time_after(jiffies, timeo)) { | |
256 | printk("_DoC_WaitReady timed out.\n"); | |
257 | return -EIO; | |
258 | } | |
259 | udelay(1); | |
260 | cond_resched(); | |
261 | } | |
262 | } else { | |
263 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
264 | if (time_after(jiffies, timeo)) { | |
265 | printk("_DoC_WaitReady timed out.\n"); | |
266 | return -EIO; | |
267 | } | |
268 | udelay(1); | |
269 | cond_resched(); | |
270 | } | |
271 | } | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
277 | { | |
e0c7d767 | 278 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
279 | int ret = 0; |
280 | ||
281 | if (DoC_is_MillenniumPlus(doc)) { | |
282 | DoC_Delay(doc, 4); | |
283 | ||
284 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
285 | /* Call the out-of-line routine to wait */ | |
286 | ret = _DoC_WaitReady(doc); | |
287 | } else { | |
288 | DoC_Delay(doc, 4); | |
289 | ||
290 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
291 | /* Call the out-of-line routine to wait */ | |
292 | ret = _DoC_WaitReady(doc); | |
293 | DoC_Delay(doc, 2); | |
294 | } | |
295 | ||
e0c7d767 DW |
296 | if (debug) |
297 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
298 | return ret; |
299 | } | |
300 | ||
301 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
302 | { | |
303 | struct nand_chip *this = mtd->priv; | |
304 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 305 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 306 | |
e0c7d767 DW |
307 | if (debug) |
308 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
309 | WriteDOC(datum, docptr, CDSNSlowIO); |
310 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
311 | } | |
312 | ||
313 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
314 | { | |
315 | struct nand_chip *this = mtd->priv; | |
316 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 317 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
318 | u_char ret; |
319 | ||
320 | ReadDOC(docptr, CDSNSlowIO); | |
321 | DoC_Delay(doc, 2); | |
322 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
323 | if (debug) |
324 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
325 | return ret; |
326 | } | |
327 | ||
e0c7d767 | 328 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
329 | { |
330 | struct nand_chip *this = mtd->priv; | |
331 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 332 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 333 | int i; |
e0c7d767 DW |
334 | if (debug) |
335 | printk("writebuf of %d bytes: ", len); | |
336 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
337 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
338 | if (debug && i < 16) | |
339 | printk("%02x ", buf[i]); | |
340 | } | |
e0c7d767 DW |
341 | if (debug) |
342 | printk("\n"); | |
1da177e4 LT |
343 | } |
344 | ||
e0c7d767 | 345 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
346 | { |
347 | struct nand_chip *this = mtd->priv; | |
348 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
349 | void __iomem *docptr = doc->virtadr; |
350 | int i; | |
1da177e4 | 351 | |
e0c7d767 DW |
352 | if (debug) |
353 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 354 | |
e0c7d767 | 355 | for (i = 0; i < len; i++) { |
1da177e4 LT |
356 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
357 | } | |
358 | } | |
359 | ||
e0c7d767 | 360 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
361 | { |
362 | struct nand_chip *this = mtd->priv; | |
363 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
364 | void __iomem *docptr = doc->virtadr; |
365 | int i; | |
1da177e4 | 366 | |
e0c7d767 DW |
367 | if (debug) |
368 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 369 | |
e0c7d767 DW |
370 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
371 | for (i = 0; i < len; i++) { | |
372 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 LT |
373 | } |
374 | } else { | |
e0c7d767 DW |
375 | for (i = 0; i < len; i += 4) { |
376 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
377 | } |
378 | } | |
379 | } | |
380 | ||
e0c7d767 | 381 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
382 | { |
383 | struct nand_chip *this = mtd->priv; | |
384 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 385 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
386 | int i; |
387 | ||
e0c7d767 | 388 | for (i = 0; i < len; i++) |
1da177e4 LT |
389 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
390 | return -EFAULT; | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
395 | { | |
396 | struct nand_chip *this = mtd->priv; | |
397 | struct doc_priv *doc = this->priv; | |
398 | uint16_t ret; | |
399 | ||
400 | doc200x_select_chip(mtd, nr); | |
7abd3ef9 TG |
401 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
402 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
403 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
404 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 405 | |
dfd61294 | 406 | /* We cant' use dev_ready here, but at least we wait for the |
61b03bd7 | 407 | * command to complete |
dfd61294 TG |
408 | */ |
409 | udelay(50); | |
61b03bd7 | 410 | |
1da177e4 LT |
411 | ret = this->read_byte(mtd) << 8; |
412 | ret |= this->read_byte(mtd); | |
413 | ||
414 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
415 | /* First chip probe. See if we get same results by 32-bit access */ | |
416 | union { | |
417 | uint32_t dword; | |
418 | uint8_t byte[4]; | |
419 | } ident; | |
420 | void __iomem *docptr = doc->virtadr; | |
421 | ||
7abd3ef9 TG |
422 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
423 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
424 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
425 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
426 | NAND_NCE | NAND_CTRL_CHANGE); | |
1da177e4 | 427 | |
dfd61294 TG |
428 | udelay(50); |
429 | ||
1da177e4 LT |
430 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
431 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
432 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
433 | this->read_buf = &doc2000_readbuf_dword; | |
434 | } | |
435 | } | |
61b03bd7 | 436 | |
1da177e4 LT |
437 | return ret; |
438 | } | |
439 | ||
440 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
441 | { | |
442 | struct nand_chip *this = mtd->priv; | |
443 | struct doc_priv *doc = this->priv; | |
444 | uint16_t mfrid; | |
445 | int i; | |
446 | ||
447 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
448 | doc->chips_per_floor = 4; | |
449 | ||
450 | /* Find out what the first chip is */ | |
451 | mfrid = doc200x_ident_chip(mtd, 0); | |
452 | ||
453 | /* Find how many chips in each floor. */ | |
454 | for (i = 1; i < 4; i++) { | |
455 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
456 | break; | |
457 | } | |
458 | doc->chips_per_floor = i; | |
459 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
460 | } | |
461 | ||
7bc3312b | 462 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 LT |
463 | { |
464 | struct doc_priv *doc = this->priv; | |
465 | ||
466 | int status; | |
61b03bd7 | 467 | |
1da177e4 LT |
468 | DoC_WaitReady(doc); |
469 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
470 | DoC_WaitReady(doc); | |
471 | status = (int)this->read_byte(mtd); | |
472 | ||
473 | return status; | |
474 | } | |
475 | ||
476 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
477 | { | |
478 | struct nand_chip *this = mtd->priv; | |
479 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 480 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
481 | |
482 | WriteDOC(datum, docptr, CDSNSlowIO); | |
483 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
484 | WriteDOC(datum, docptr, WritePipeTerm); | |
485 | } | |
486 | ||
487 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
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 | |
493 | //ReadDOC(docptr, CDSNSlowIO); | |
494 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
495 | DoC_Delay(doc, 2); | |
496 | ReadDOC(docptr, ReadPipeInit); | |
497 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
498 | return ReadDOC(docptr, LastDataRead); | |
499 | } | |
500 | ||
e0c7d767 | 501 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
502 | { |
503 | struct nand_chip *this = mtd->priv; | |
504 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 505 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
506 | int i; |
507 | ||
e0c7d767 | 508 | for (i = 0; i < len; i++) |
1da177e4 LT |
509 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
510 | /* Terminate write pipeline */ | |
511 | WriteDOC(0x00, docptr, WritePipeTerm); | |
512 | } | |
513 | ||
e0c7d767 | 514 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
515 | { |
516 | struct nand_chip *this = mtd->priv; | |
517 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 518 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
519 | int i; |
520 | ||
521 | /* Start read pipeline */ | |
522 | ReadDOC(docptr, ReadPipeInit); | |
523 | ||
e0c7d767 | 524 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
525 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
526 | ||
527 | /* Terminate read pipeline */ | |
528 | buf[i] = ReadDOC(docptr, LastDataRead); | |
529 | } | |
530 | ||
e0c7d767 | 531 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
532 | { |
533 | struct nand_chip *this = mtd->priv; | |
534 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 535 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
536 | int i; |
537 | ||
538 | /* Start read pipeline */ | |
539 | ReadDOC(docptr, ReadPipeInit); | |
540 | ||
e0c7d767 | 541 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
542 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
543 | ReadDOC(docptr, LastDataRead); | |
544 | return i; | |
545 | } | |
546 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
547 | return i; | |
548 | return 0; | |
549 | } | |
550 | ||
551 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
552 | { | |
553 | struct nand_chip *this = mtd->priv; | |
554 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 555 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
556 | u_char ret; |
557 | ||
e0c7d767 DW |
558 | ReadDOC(docptr, Mplus_ReadPipeInit); |
559 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
560 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
561 | if (debug) | |
562 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
563 | return ret; |
564 | } | |
565 | ||
e0c7d767 | 566 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
567 | { |
568 | struct nand_chip *this = mtd->priv; | |
569 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 570 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
571 | int i; |
572 | ||
e0c7d767 DW |
573 | if (debug) |
574 | printk("writebuf of %d bytes: ", len); | |
575 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
576 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
577 | if (debug && i < 16) | |
578 | printk("%02x ", buf[i]); | |
579 | } | |
e0c7d767 DW |
580 | if (debug) |
581 | printk("\n"); | |
1da177e4 LT |
582 | } |
583 | ||
e0c7d767 | 584 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
585 | { |
586 | struct nand_chip *this = mtd->priv; | |
587 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 588 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
589 | int i; |
590 | ||
e0c7d767 DW |
591 | if (debug) |
592 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
593 | |
594 | /* Start read pipeline */ | |
595 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
596 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
597 | ||
e0c7d767 | 598 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
599 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
600 | if (debug && i < 16) | |
601 | printk("%02x ", buf[i]); | |
602 | } | |
603 | ||
604 | /* Terminate read pipeline */ | |
e0c7d767 | 605 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 606 | if (debug && i < 16) |
e0c7d767 DW |
607 | printk("%02x ", buf[len - 2]); |
608 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 609 | if (debug && i < 16) |
e0c7d767 DW |
610 | printk("%02x ", buf[len - 1]); |
611 | if (debug) | |
612 | printk("\n"); | |
1da177e4 LT |
613 | } |
614 | ||
e0c7d767 | 615 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
616 | { |
617 | struct nand_chip *this = mtd->priv; | |
618 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 619 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
620 | int i; |
621 | ||
e0c7d767 DW |
622 | if (debug) |
623 | printk("verifybuf of %d bytes: ", len); | |
1da177e4 LT |
624 | |
625 | /* Start read pipeline */ | |
626 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
627 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
628 | ||
e0c7d767 | 629 | for (i = 0; i < len - 2; i++) |
1da177e4 LT |
630 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
631 | ReadDOC(docptr, Mplus_LastDataRead); | |
632 | ReadDOC(docptr, Mplus_LastDataRead); | |
633 | return i; | |
634 | } | |
e0c7d767 DW |
635 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
636 | return len - 2; | |
637 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
638 | return len - 1; | |
1da177e4 LT |
639 | return 0; |
640 | } | |
641 | ||
642 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
643 | { | |
644 | struct nand_chip *this = mtd->priv; | |
645 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 646 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
647 | int floor = 0; |
648 | ||
e0c7d767 DW |
649 | if (debug) |
650 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
651 | |
652 | if (chip == -1) { | |
653 | /* Disable flash internally */ | |
654 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
655 | return; | |
656 | } | |
657 | ||
658 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 659 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
660 | |
661 | /* Assert ChipEnable and deassert WriteProtect */ | |
662 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
663 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
664 | ||
665 | doc->curchip = chip; | |
666 | doc->curfloor = floor; | |
667 | } | |
668 | ||
669 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
670 | { | |
671 | struct nand_chip *this = mtd->priv; | |
672 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 673 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
674 | int floor = 0; |
675 | ||
e0c7d767 DW |
676 | if (debug) |
677 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
678 | |
679 | if (chip == -1) | |
680 | return; | |
681 | ||
682 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 683 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
684 | |
685 | /* 11.4.4 -- deassert CE before changing chip */ | |
7abd3ef9 | 686 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
687 | |
688 | WriteDOC(floor, docptr, FloorSelect); | |
689 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
690 | ||
7abd3ef9 | 691 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
692 | |
693 | doc->curchip = chip; | |
694 | doc->curfloor = floor; | |
695 | } | |
696 | ||
7abd3ef9 TG |
697 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
698 | ||
699 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
700 | unsigned int ctrl) | |
1da177e4 LT |
701 | { |
702 | struct nand_chip *this = mtd->priv; | |
703 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 704 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 705 | |
7abd3ef9 TG |
706 | if (ctrl & NAND_CTRL_CHANGE) { |
707 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
708 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
709 | if (debug) | |
710 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
711 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
712 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
713 | DoC_Delay(doc, 4); | |
1da177e4 | 714 | } |
cad74f2c TG |
715 | if (cmd != NAND_CMD_NONE) { |
716 | if (DoC_is_2000(doc)) | |
717 | doc2000_write_byte(mtd, cmd); | |
718 | else | |
719 | doc2001_write_byte(mtd, cmd); | |
720 | } | |
1da177e4 LT |
721 | } |
722 | ||
e0c7d767 | 723 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
724 | { |
725 | struct nand_chip *this = mtd->priv; | |
726 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 727 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
728 | |
729 | /* | |
730 | * Must terminate write pipeline before sending any commands | |
731 | * to the device. | |
732 | */ | |
733 | if (command == NAND_CMD_PAGEPROG) { | |
734 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
735 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
736 | } | |
737 | ||
738 | /* | |
739 | * Write out the command to the device. | |
740 | */ | |
741 | if (command == NAND_CMD_SEQIN) { | |
742 | int readcmd; | |
743 | ||
28318776 | 744 | if (column >= mtd->writesize) { |
1da177e4 | 745 | /* OOB area */ |
28318776 | 746 | column -= mtd->writesize; |
1da177e4 LT |
747 | readcmd = NAND_CMD_READOOB; |
748 | } else if (column < 256) { | |
749 | /* First 256 bytes --> READ0 */ | |
750 | readcmd = NAND_CMD_READ0; | |
751 | } else { | |
752 | column -= 256; | |
753 | readcmd = NAND_CMD_READ1; | |
754 | } | |
755 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
756 | } | |
757 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
758 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
759 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
760 | ||
761 | if (column != -1 || page_addr != -1) { | |
762 | /* Serially input address */ | |
763 | if (column != -1) { | |
764 | /* Adjust columns for 16 bit buswidth */ | |
765 | if (this->options & NAND_BUSWIDTH_16) | |
766 | column >>= 1; | |
767 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
768 | } | |
769 | if (page_addr != -1) { | |
e0c7d767 DW |
770 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
771 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
772 | /* One more address cycle for higher density devices */ |
773 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 774 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
775 | printk("high density\n"); |
776 | } | |
777 | } | |
778 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
779 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
780 | /* deassert ALE */ | |
e0c7d767 DW |
781 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
782 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
783 | WriteDOC(0, docptr, Mplus_FlashControl); |
784 | } | |
785 | ||
61b03bd7 | 786 | /* |
1da177e4 LT |
787 | * program and erase have their own busy handlers |
788 | * status and sequential in needs no delay | |
e0c7d767 | 789 | */ |
1da177e4 LT |
790 | switch (command) { |
791 | ||
792 | case NAND_CMD_PAGEPROG: | |
793 | case NAND_CMD_ERASE1: | |
794 | case NAND_CMD_ERASE2: | |
795 | case NAND_CMD_SEQIN: | |
796 | case NAND_CMD_STATUS: | |
797 | return; | |
798 | ||
799 | case NAND_CMD_RESET: | |
800 | if (this->dev_ready) | |
801 | break; | |
802 | udelay(this->chip_delay); | |
803 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
804 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
805 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 806 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
807 | return; |
808 | ||
e0c7d767 | 809 | /* This applies to read commands */ |
1da177e4 | 810 | default: |
61b03bd7 | 811 | /* |
1da177e4 LT |
812 | * If we don't have access to the busy pin, we apply the given |
813 | * command delay | |
e0c7d767 | 814 | */ |
1da177e4 | 815 | if (!this->dev_ready) { |
e0c7d767 | 816 | udelay(this->chip_delay); |
1da177e4 LT |
817 | return; |
818 | } | |
819 | } | |
820 | ||
821 | /* Apply this short delay always to ensure that we do wait tWB in | |
822 | * any case on any machine. */ | |
e0c7d767 | 823 | ndelay(100); |
1da177e4 | 824 | /* wait until command is processed */ |
e0c7d767 | 825 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
826 | } |
827 | ||
828 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
829 | { | |
830 | struct nand_chip *this = mtd->priv; | |
831 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 832 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
833 | |
834 | if (DoC_is_MillenniumPlus(doc)) { | |
835 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
836 | DoC_Delay(doc, 4); | |
837 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 838 | if (debug) |
1da177e4 LT |
839 | printk("not ready\n"); |
840 | return 0; | |
841 | } | |
e0c7d767 DW |
842 | if (debug) |
843 | printk("was ready\n"); | |
1da177e4 LT |
844 | return 1; |
845 | } else { | |
846 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
847 | DoC_Delay(doc, 4); | |
848 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 849 | if (debug) |
1da177e4 LT |
850 | printk("not ready\n"); |
851 | return 0; | |
852 | } | |
853 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
854 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
855 | if (debug) |
856 | printk("was ready\n"); | |
1da177e4 LT |
857 | return 1; |
858 | } | |
859 | } | |
860 | ||
861 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
862 | { | |
863 | /* This is our last resort if we couldn't find or create a BBT. Just | |
864 | pretend all blocks are good. */ | |
865 | return 0; | |
866 | } | |
867 | ||
868 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
869 | { | |
870 | struct nand_chip *this = mtd->priv; | |
871 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 872 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
873 | |
874 | /* Prime the ECC engine */ | |
e0c7d767 | 875 | switch (mode) { |
1da177e4 LT |
876 | case NAND_ECC_READ: |
877 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
878 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
879 | break; | |
880 | case NAND_ECC_WRITE: | |
881 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
882 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
883 | break; | |
884 | } | |
885 | } | |
886 | ||
887 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
888 | { | |
889 | struct nand_chip *this = mtd->priv; | |
890 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 891 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
892 | |
893 | /* Prime the ECC engine */ | |
e0c7d767 | 894 | switch (mode) { |
1da177e4 LT |
895 | case NAND_ECC_READ: |
896 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
897 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
898 | break; | |
899 | case NAND_ECC_WRITE: | |
900 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
901 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
902 | break; | |
903 | } | |
904 | } | |
905 | ||
906 | /* This code is only called on write */ | |
e0c7d767 | 907 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 LT |
908 | { |
909 | struct nand_chip *this = mtd->priv; | |
910 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 911 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
912 | int i; |
913 | int emptymatch = 1; | |
914 | ||
915 | /* flush the pipeline */ | |
916 | if (DoC_is_2000(doc)) { | |
917 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
918 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
919 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
920 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
921 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
922 | } else if (DoC_is_MillenniumPlus(doc)) { | |
923 | WriteDOC(0, docptr, Mplus_NOP); | |
924 | WriteDOC(0, docptr, Mplus_NOP); | |
925 | WriteDOC(0, docptr, Mplus_NOP); | |
926 | } else { | |
927 | WriteDOC(0, docptr, NOP); | |
928 | WriteDOC(0, docptr, NOP); | |
929 | WriteDOC(0, docptr, NOP); | |
930 | } | |
931 | ||
932 | for (i = 0; i < 6; i++) { | |
933 | if (DoC_is_MillenniumPlus(doc)) | |
934 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 935 | else |
1da177e4 LT |
936 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
937 | if (ecc_code[i] != empty_write_ecc[i]) | |
938 | emptymatch = 0; | |
939 | } | |
940 | if (DoC_is_MillenniumPlus(doc)) | |
941 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
942 | else | |
943 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
944 | #if 0 | |
945 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
946 | if (emptymatch) { | |
947 | /* Note: this somewhat expensive test should not be triggered | |
948 | often. It could be optimized away by examining the data in | |
949 | the writebuf routine, and remembering the result. */ | |
950 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
951 | if (dat[i] == 0xff) |
952 | continue; | |
1da177e4 LT |
953 | emptymatch = 0; |
954 | break; | |
955 | } | |
956 | } | |
957 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
958 | Return all-0xff ecc value instead of the computed one, so | |
959 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
960 | if (emptymatch) |
961 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
962 | #endif |
963 | return 0; | |
964 | } | |
965 | ||
f5bbdacc TG |
966 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
967 | u_char *read_ecc, u_char *isnull) | |
1da177e4 LT |
968 | { |
969 | int i, ret = 0; | |
970 | struct nand_chip *this = mtd->priv; | |
971 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 972 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 973 | uint8_t calc_ecc[6]; |
1da177e4 LT |
974 | volatile u_char dummy; |
975 | int emptymatch = 1; | |
61b03bd7 | 976 | |
1da177e4 LT |
977 | /* flush the pipeline */ |
978 | if (DoC_is_2000(doc)) { | |
979 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
980 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
981 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
982 | } else if (DoC_is_MillenniumPlus(doc)) { | |
983 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
984 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
985 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
986 | } else { | |
987 | dummy = ReadDOC(docptr, ECCConf); | |
988 | dummy = ReadDOC(docptr, ECCConf); | |
989 | dummy = ReadDOC(docptr, ECCConf); | |
990 | } | |
61b03bd7 | 991 | |
1da177e4 LT |
992 | /* Error occured ? */ |
993 | if (dummy & 0x80) { | |
994 | for (i = 0; i < 6; i++) { | |
995 | if (DoC_is_MillenniumPlus(doc)) | |
996 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
997 | else | |
998 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
999 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
1000 | emptymatch = 0; | |
1001 | } | |
1002 | /* If emptymatch=1, the read syndrome is consistent with an | |
1003 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1004 | if (emptymatch) { | |
1005 | for (i = 0; i < 6; i++) { | |
e0c7d767 DW |
1006 | if (read_ecc[i] == 0xff) |
1007 | continue; | |
1da177e4 LT |
1008 | emptymatch = 0; |
1009 | break; | |
1010 | } | |
1011 | } | |
1012 | /* If emptymatch still =1, check the data block. */ | |
1013 | if (emptymatch) { | |
e0c7d767 DW |
1014 | /* Note: this somewhat expensive test should not be triggered |
1015 | often. It could be optimized away by examining the data in | |
1016 | the readbuf routine, and remembering the result. */ | |
1da177e4 | 1017 | for (i = 0; i < 512; i++) { |
e0c7d767 DW |
1018 | if (dat[i] == 0xff) |
1019 | continue; | |
1da177e4 LT |
1020 | emptymatch = 0; |
1021 | break; | |
1022 | } | |
1023 | } | |
1024 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1025 | erased block, in which case the ECC will not come out right. | |
1026 | We'll suppress the error and tell the caller everything's | |
1027 | OK. Because it is. */ | |
e0c7d767 DW |
1028 | if (!emptymatch) |
1029 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
1030 | if (ret > 0) |
1031 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 1032 | } |
1da177e4 LT |
1033 | if (DoC_is_MillenniumPlus(doc)) |
1034 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1035 | else | |
1036 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1037 | if (no_ecc_failures && (ret == -1)) { | |
1038 | printk(KERN_ERR "suppressing ECC failure\n"); | |
1039 | ret = 0; | |
1040 | } | |
1041 | return ret; | |
1042 | } | |
61b03bd7 | 1043 | |
1da177e4 LT |
1044 | //u_char mydatabuf[528]; |
1045 | ||
abc37e67 DB |
1046 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
1047 | * attempt to retain compatibility. It used to read: | |
1048 | * .oobfree = { {8, 8} } | |
1049 | * Since that leaves two bytes unusable, it was changed. But the following | |
1050 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1051 | * .oobfree = { {6, 10} } | |
1052 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1053 | * safer. The only problem with it is that any code that parses oobfree must | |
1054 | * be able to handle out-of-order segments. | |
1055 | */ | |
5bd34c09 | 1056 | static struct nand_ecclayout doc200x_oobinfo = { |
e0c7d767 DW |
1057 | .eccbytes = 6, |
1058 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
1059 | .oobfree = {{8, 8}, {6, 2}} | |
1da177e4 | 1060 | }; |
61b03bd7 | 1061 | |
1da177e4 LT |
1062 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
1063 | On sucessful return, buf will contain a copy of the media header for | |
1064 | further processing. id is the string to scan for, and will presumably be | |
1065 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1066 | header. The page #s of the found media headers are placed in mh0_page and | |
1067 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1068 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 LT |
1069 | { |
1070 | struct nand_chip *this = mtd->priv; | |
1071 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1072 | unsigned offs; |
1da177e4 LT |
1073 | int ret; |
1074 | size_t retlen; | |
1075 | ||
1a78ff6b | 1076 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
28318776 JE |
1077 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1078 | if (retlen != mtd->writesize) | |
e0c7d767 | 1079 | continue; |
1da177e4 | 1080 | if (ret) { |
e0c7d767 | 1081 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1082 | } |
e0c7d767 DW |
1083 | if (memcmp(buf, id, 6)) |
1084 | continue; | |
1da177e4 LT |
1085 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1086 | if (doc->mh0_page == -1) { | |
1087 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1088 | if (!findmirror) |
1089 | return 1; | |
1da177e4 LT |
1090 | continue; |
1091 | } | |
1092 | doc->mh1_page = offs >> this->page_shift; | |
1093 | return 2; | |
1094 | } | |
1095 | if (doc->mh0_page == -1) { | |
1096 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1097 | return 0; | |
1098 | } | |
1099 | /* Only one mediaheader was found. We want buf to contain a | |
1100 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1101 | offs = doc->mh0_page << this->page_shift; | |
28318776 JE |
1102 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1103 | if (retlen != mtd->writesize) { | |
1da177e4 LT |
1104 | /* Insanity. Give up. */ |
1105 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1106 | return 0; | |
1107 | } | |
1108 | return 1; | |
1109 | } | |
1110 | ||
e0c7d767 | 1111 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1112 | { |
1113 | struct nand_chip *this = mtd->priv; | |
1114 | struct doc_priv *doc = this->priv; | |
1115 | int ret = 0; | |
1116 | u_char *buf; | |
1117 | struct NFTLMediaHeader *mh; | |
1118 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1119 | int numparts = 0; |
1da177e4 LT |
1120 | unsigned blocks, maxblocks; |
1121 | int offs, numheaders; | |
1122 | ||
28318776 | 1123 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1124 | if (!buf) { |
1125 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1126 | return 0; | |
1127 | } | |
e0c7d767 DW |
1128 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1129 | goto out; | |
1130 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1131 | |
f29a4b86 TG |
1132 | mh->NumEraseUnits = le16_to_cpu(mh->NumEraseUnits); |
1133 | mh->FirstPhysicalEUN = le16_to_cpu(mh->FirstPhysicalEUN); | |
1134 | mh->FormattedSize = le32_to_cpu(mh->FormattedSize); | |
1135 | ||
1da177e4 LT |
1136 | printk(KERN_INFO " DataOrgID = %s\n" |
1137 | " NumEraseUnits = %d\n" | |
1138 | " FirstPhysicalEUN = %d\n" | |
1139 | " FormattedSize = %d\n" | |
1140 | " UnitSizeFactor = %d\n", | |
1141 | mh->DataOrgID, mh->NumEraseUnits, | |
1142 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1143 | mh->UnitSizeFactor); | |
1da177e4 LT |
1144 | |
1145 | blocks = mtd->size >> this->phys_erase_shift; | |
1146 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1147 | ||
1148 | if (mh->UnitSizeFactor == 0x00) { | |
1149 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1150 | - There can be at most 32768 virtual blocks. | |
1151 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1152 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1153 | */ | |
1da177e4 LT |
1154 | mh->UnitSizeFactor = 0xff; |
1155 | while (blocks > maxblocks) { | |
1156 | blocks >>= 1; | |
1157 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1158 | mh->UnitSizeFactor--; | |
1159 | } | |
1160 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1161 | } | |
1162 | ||
1163 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1164 | layers; variables with have already been configured by nand_scan. | |
1165 | Unfortunately, we didn't know before this point what these values | |
1166 | should be. Thus, this code is somewhat dependant on the exact | |
1167 | implementation of the NAND layer. */ | |
1168 | if (mh->UnitSizeFactor != 0xff) { | |
1169 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1170 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1171 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1172 | blocks = mtd->size >> this->bbt_erase_shift; | |
1173 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1174 | } | |
1175 | ||
1176 | if (blocks > maxblocks) { | |
1177 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1178 | goto out; | |
1179 | } | |
1180 | ||
1181 | /* Skip past the media headers. */ | |
1182 | offs = max(doc->mh0_page, doc->mh1_page); | |
1183 | offs <<= this->page_shift; | |
1184 | offs += mtd->erasesize; | |
1185 | ||
1a78ff6b DB |
1186 | if (show_firmware_partition == 1) { |
1187 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1188 | parts[0].offset = 0; | |
1189 | parts[0].size = offs; | |
1190 | numparts = 1; | |
1191 | } | |
1192 | ||
1193 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1194 | parts[numparts].offset = offs; | |
1195 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1196 | ||
1197 | offs += parts[numparts].size; | |
1198 | numparts++; | |
1da177e4 | 1199 | |
1da177e4 | 1200 | if (offs < mtd->size) { |
1a78ff6b DB |
1201 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1202 | parts[numparts].offset = offs; | |
1203 | parts[numparts].size = mtd->size - offs; | |
1204 | numparts++; | |
1da177e4 | 1205 | } |
1a78ff6b DB |
1206 | |
1207 | ret = numparts; | |
e0c7d767 | 1208 | out: |
1da177e4 LT |
1209 | kfree(buf); |
1210 | return ret; | |
1211 | } | |
1212 | ||
1213 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1214 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1215 | { |
1216 | struct nand_chip *this = mtd->priv; | |
1217 | struct doc_priv *doc = this->priv; | |
1218 | int ret = 0; | |
1219 | u_char *buf; | |
1220 | struct INFTLMediaHeader *mh; | |
1221 | struct INFTLPartition *ip; | |
1222 | int numparts = 0; | |
1223 | int blocks; | |
1224 | int vshift, lastvunit = 0; | |
1225 | int i; | |
1226 | int end = mtd->size; | |
1227 | ||
1228 | if (inftl_bbt_write) | |
1229 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1230 | ||
28318776 | 1231 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1232 | if (!buf) { |
1233 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1234 | return 0; | |
1235 | } | |
1236 | ||
e0c7d767 DW |
1237 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1238 | goto out; | |
1da177e4 | 1239 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1240 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 LT |
1241 | |
1242 | mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks); | |
1243 | mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions); | |
1244 | mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions); | |
1245 | mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits); | |
1246 | mh->FormatFlags = le32_to_cpu(mh->FormatFlags); | |
1247 | mh->PercentUsed = le32_to_cpu(mh->PercentUsed); | |
61b03bd7 | 1248 | |
1da177e4 LT |
1249 | printk(KERN_INFO " bootRecordID = %s\n" |
1250 | " NoOfBootImageBlocks = %d\n" | |
1251 | " NoOfBinaryPartitions = %d\n" | |
1252 | " NoOfBDTLPartitions = %d\n" | |
1253 | " BlockMultiplerBits = %d\n" | |
1254 | " FormatFlgs = %d\n" | |
1255 | " OsakVersion = %d.%d.%d.%d\n" | |
1256 | " PercentUsed = %d\n", | |
1257 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1258 | mh->NoOfBinaryPartitions, | |
1259 | mh->NoOfBDTLPartitions, | |
1260 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1261 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1262 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1263 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1264 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1265 | mh->PercentUsed); | |
1da177e4 LT |
1266 | |
1267 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1268 | ||
1269 | blocks = mtd->size >> vshift; | |
1270 | if (blocks > 32768) { | |
1271 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1272 | goto out; | |
1273 | } | |
1274 | ||
1275 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1276 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1277 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1278 | goto out; | |
1279 | } | |
1280 | ||
1281 | /* Scan the partitions */ | |
1282 | for (i = 0; (i < 4); i++) { | |
1283 | ip = &(mh->Partitions[i]); | |
1284 | ip->virtualUnits = le32_to_cpu(ip->virtualUnits); | |
1285 | ip->firstUnit = le32_to_cpu(ip->firstUnit); | |
1286 | ip->lastUnit = le32_to_cpu(ip->lastUnit); | |
1287 | ip->flags = le32_to_cpu(ip->flags); | |
1288 | ip->spareUnits = le32_to_cpu(ip->spareUnits); | |
1289 | ip->Reserved0 = le32_to_cpu(ip->Reserved0); | |
1290 | ||
1da177e4 LT |
1291 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1292 | " virtualUnits = %d\n" | |
1293 | " firstUnit = %d\n" | |
1294 | " lastUnit = %d\n" | |
1295 | " flags = 0x%x\n" | |
1296 | " spareUnits = %d\n", | |
1297 | i, ip->virtualUnits, ip->firstUnit, | |
1298 | ip->lastUnit, ip->flags, | |
1299 | ip->spareUnits); | |
1da177e4 | 1300 | |
1a78ff6b DB |
1301 | if ((show_firmware_partition == 1) && |
1302 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1303 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1304 | parts[0].offset = 0; | |
1305 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1306 | numparts = 1; | |
1307 | } | |
1da177e4 LT |
1308 | |
1309 | if (ip->flags & INFTL_BINARY) | |
1310 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1311 | else | |
1312 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1313 | parts[numparts].offset = ip->firstUnit << vshift; | |
1314 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1315 | numparts++; | |
e0c7d767 DW |
1316 | if (ip->lastUnit > lastvunit) |
1317 | lastvunit = ip->lastUnit; | |
1318 | if (ip->flags & INFTL_LAST) | |
1319 | break; | |
1da177e4 LT |
1320 | } |
1321 | lastvunit++; | |
1322 | if ((lastvunit << vshift) < end) { | |
1323 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1324 | parts[numparts].offset = lastvunit << vshift; | |
1325 | parts[numparts].size = end - parts[numparts].offset; | |
1326 | numparts++; | |
1327 | } | |
1328 | ret = numparts; | |
e0c7d767 | 1329 | out: |
1da177e4 LT |
1330 | kfree(buf); |
1331 | return ret; | |
1332 | } | |
1333 | ||
1334 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1335 | { | |
1336 | int ret, numparts; | |
1337 | struct nand_chip *this = mtd->priv; | |
1338 | struct doc_priv *doc = this->priv; | |
1339 | struct mtd_partition parts[2]; | |
1340 | ||
e0c7d767 | 1341 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1342 | /* On NFTL, we have to find the media headers before we can read the |
1343 | BBTs, since they're stored in the media header eraseblocks. */ | |
1344 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1345 | if (!numparts) |
1346 | return -EIO; | |
1da177e4 LT |
1347 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1348 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1349 | NAND_BBT_VERSION; | |
1350 | this->bbt_td->veroffs = 7; | |
1351 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1352 | if (doc->mh1_page != -1) { | |
1353 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1354 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1355 | NAND_BBT_VERSION; | |
1356 | this->bbt_md->veroffs = 7; | |
1357 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1358 | } else { | |
1359 | this->bbt_md = NULL; | |
1360 | } | |
1361 | ||
1362 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1363 | At least as nand_bbt.c is currently written. */ | |
1364 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1365 | return ret; | |
1366 | add_mtd_device(mtd); | |
1367 | #ifdef CONFIG_MTD_PARTITIONS | |
1368 | if (!no_autopart) | |
1369 | add_mtd_partitions(mtd, parts, numparts); | |
1370 | #endif | |
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1375 | { | |
1376 | int ret, numparts; | |
1377 | struct nand_chip *this = mtd->priv; | |
1378 | struct doc_priv *doc = this->priv; | |
1379 | struct mtd_partition parts[5]; | |
1380 | ||
1381 | if (this->numchips > doc->chips_per_floor) { | |
1382 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1383 | return -EIO; | |
1384 | } | |
1385 | ||
1386 | if (DoC_is_MillenniumPlus(doc)) { | |
1387 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1388 | if (inftl_bbt_write) | |
1389 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1390 | this->bbt_td->pages[0] = 2; | |
1391 | this->bbt_md = NULL; | |
1392 | } else { | |
e0c7d767 | 1393 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1394 | if (inftl_bbt_write) |
1395 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1396 | this->bbt_td->offs = 8; | |
1397 | this->bbt_td->len = 8; | |
1398 | this->bbt_td->veroffs = 7; | |
1399 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1400 | this->bbt_td->reserved_block_code = 0x01; | |
1401 | this->bbt_td->pattern = "MSYS_BBT"; | |
1402 | ||
e0c7d767 | 1403 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1404 | if (inftl_bbt_write) |
1405 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1406 | this->bbt_md->offs = 8; | |
1407 | this->bbt_md->len = 8; | |
1408 | this->bbt_md->veroffs = 7; | |
1409 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1410 | this->bbt_md->reserved_block_code = 0x01; | |
1411 | this->bbt_md->pattern = "TBB_SYSM"; | |
1412 | } | |
1413 | ||
1414 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1415 | At least as nand_bbt.c is currently written. */ | |
1416 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1417 | return ret; | |
e0c7d767 | 1418 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1419 | numparts = inftl_partscan(mtd, parts); |
1420 | /* At least for now, require the INFTL Media Header. We could probably | |
1421 | do without it for non-INFTL use, since all it gives us is | |
1422 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1423 | if (!numparts) |
1424 | return -EIO; | |
1da177e4 LT |
1425 | add_mtd_device(mtd); |
1426 | #ifdef CONFIG_MTD_PARTITIONS | |
1427 | if (!no_autopart) | |
1428 | add_mtd_partitions(mtd, parts, numparts); | |
1429 | #endif | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1434 | { | |
1435 | struct nand_chip *this = mtd->priv; | |
1436 | struct doc_priv *doc = this->priv; | |
1437 | ||
1da177e4 LT |
1438 | this->read_byte = doc2000_read_byte; |
1439 | this->write_buf = doc2000_writebuf; | |
1440 | this->read_buf = doc2000_readbuf; | |
1441 | this->verify_buf = doc2000_verifybuf; | |
1442 | this->scan_bbt = nftl_scan_bbt; | |
1443 | ||
1444 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1445 | doc2000_count_chips(mtd); | |
1446 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1447 | return (4 * doc->chips_per_floor); | |
1448 | } | |
1449 | ||
1450 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1451 | { | |
1452 | struct nand_chip *this = mtd->priv; | |
1453 | struct doc_priv *doc = this->priv; | |
1454 | ||
1da177e4 LT |
1455 | this->read_byte = doc2001_read_byte; |
1456 | this->write_buf = doc2001_writebuf; | |
1457 | this->read_buf = doc2001_readbuf; | |
1458 | this->verify_buf = doc2001_verifybuf; | |
1459 | ||
1460 | ReadDOC(doc->virtadr, ChipID); | |
1461 | ReadDOC(doc->virtadr, ChipID); | |
1462 | ReadDOC(doc->virtadr, ChipID); | |
1463 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1464 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1465 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1466 | Treat it like a Millennium, except that it |
1467 | can have multiple chips. */ | |
1468 | doc2000_count_chips(mtd); | |
1469 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1470 | this->scan_bbt = inftl_scan_bbt; | |
1471 | return (4 * doc->chips_per_floor); | |
1472 | } else { | |
1473 | /* Bog-standard Millennium */ | |
1474 | doc->chips_per_floor = 1; | |
1475 | mtd->name = "DiskOnChip Millennium"; | |
1476 | this->scan_bbt = nftl_scan_bbt; | |
1477 | return 1; | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1482 | { | |
1483 | struct nand_chip *this = mtd->priv; | |
1484 | struct doc_priv *doc = this->priv; | |
1485 | ||
1da177e4 LT |
1486 | this->read_byte = doc2001plus_read_byte; |
1487 | this->write_buf = doc2001plus_writebuf; | |
1488 | this->read_buf = doc2001plus_readbuf; | |
1489 | this->verify_buf = doc2001plus_verifybuf; | |
1490 | this->scan_bbt = inftl_scan_bbt; | |
7abd3ef9 | 1491 | this->cmd_ctrl = NULL; |
1da177e4 LT |
1492 | this->select_chip = doc2001plus_select_chip; |
1493 | this->cmdfunc = doc2001plus_command; | |
0cddd6c2 | 1494 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1495 | |
1496 | doc->chips_per_floor = 1; | |
1497 | mtd->name = "DiskOnChip Millennium Plus"; | |
1498 | ||
1499 | return 1; | |
1500 | } | |
1501 | ||
858119e1 | 1502 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1503 | { |
1504 | unsigned char ChipID; | |
1505 | struct mtd_info *mtd; | |
1506 | struct nand_chip *nand; | |
1507 | struct doc_priv *doc; | |
1508 | void __iomem *virtadr; | |
1509 | unsigned char save_control; | |
1510 | unsigned char tmp, tmpb, tmpc; | |
1511 | int reg, len, numchips; | |
1512 | int ret = 0; | |
1513 | ||
1514 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1515 | if (!virtadr) { | |
1516 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1517 | return -EIO; | |
1518 | } | |
1519 | ||
1520 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1521 | * bootup procedure will put the device into reset mode, and | |
1522 | * it's not possible to talk to it without actually writing | |
1523 | * to the DOCControl register. So we store the current contents | |
1524 | * of the DOCControl register's location, in case we later decide | |
1525 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1526 | * found it. |
1da177e4 LT |
1527 | */ |
1528 | save_control = ReadDOC(virtadr, DOCControl); | |
1529 | ||
1530 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1531 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1532 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1533 | |
1534 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1535 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1536 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1537 | |
1538 | ChipID = ReadDOC(virtadr, ChipID); | |
1539 | ||
e0c7d767 | 1540 | switch (ChipID) { |
1da177e4 LT |
1541 | case DOC_ChipID_Doc2k: |
1542 | reg = DoC_2k_ECCStatus; | |
1543 | break; | |
1544 | case DOC_ChipID_DocMil: | |
1545 | reg = DoC_ECCConf; | |
1546 | break; | |
1547 | case DOC_ChipID_DocMilPlus16: | |
1548 | case DOC_ChipID_DocMilPlus32: | |
1549 | case 0: | |
1550 | /* Possible Millennium Plus, need to do more checks */ | |
1551 | /* Possibly release from power down mode */ | |
1552 | for (tmp = 0; (tmp < 4); tmp++) | |
1553 | ReadDOC(virtadr, Mplus_Power); | |
1554 | ||
1555 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1556 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1557 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1558 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1559 | ||
1560 | mdelay(1); | |
1561 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1562 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1563 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1564 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1565 | mdelay(1); | |
1566 | ||
1567 | ChipID = ReadDOC(virtadr, ChipID); | |
1568 | ||
1569 | switch (ChipID) { | |
1570 | case DOC_ChipID_DocMilPlus16: | |
1571 | reg = DoC_Mplus_Toggle; | |
1572 | break; | |
1573 | case DOC_ChipID_DocMilPlus32: | |
1574 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1575 | default: | |
1576 | ret = -ENODEV; | |
1577 | goto notfound; | |
1578 | } | |
1579 | break; | |
1580 | ||
1581 | default: | |
1582 | ret = -ENODEV; | |
1583 | goto notfound; | |
1584 | } | |
1585 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1586 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1587 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1588 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1589 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1590 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1591 | ret = -ENODEV; | |
1592 | goto notfound; | |
1593 | } | |
1594 | ||
1595 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1596 | unsigned char oldval; | |
1597 | unsigned char newval; | |
1598 | nand = mtd->priv; | |
1599 | doc = nand->priv; | |
1600 | /* Use the alias resolution register to determine if this is | |
1601 | in fact the same DOC aliased to a new address. If writes | |
1602 | to one chip's alias resolution register change the value on | |
1603 | the other chip, they're the same chip. */ | |
1604 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1605 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1606 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1607 | } else { | |
1608 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1609 | newval = ReadDOC(virtadr, AliasResolution); | |
1610 | } | |
1611 | if (oldval != newval) | |
1612 | continue; | |
1613 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1614 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1615 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1616 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1617 | } else { |
1618 | WriteDOC(~newval, virtadr, AliasResolution); | |
1619 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1620 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1621 | } |
1622 | newval = ~newval; | |
1623 | if (oldval == newval) { | |
1624 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1625 | goto notfound; | |
1626 | } | |
1627 | } | |
1628 | ||
1629 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1630 | ||
1631 | len = sizeof(struct mtd_info) + | |
e0c7d767 | 1632 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
95b93a0c | 1633 | mtd = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1634 | if (!mtd) { |
1635 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1636 | ret = -ENOMEM; | |
1637 | goto fail; | |
1638 | } | |
1da177e4 LT |
1639 | |
1640 | nand = (struct nand_chip *) (mtd + 1); | |
1641 | doc = (struct doc_priv *) (nand + 1); | |
1642 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1643 | nand->bbt_md = nand->bbt_td + 1; | |
1644 | ||
1645 | mtd->priv = nand; | |
1646 | mtd->owner = THIS_MODULE; | |
1647 | ||
1648 | nand->priv = doc; | |
1649 | nand->select_chip = doc200x_select_chip; | |
7abd3ef9 | 1650 | nand->cmd_ctrl = doc200x_hwcontrol; |
1da177e4 LT |
1651 | nand->dev_ready = doc200x_dev_ready; |
1652 | nand->waitfunc = doc200x_wait; | |
1653 | nand->block_bad = doc200x_block_bad; | |
6dfc6d25 TG |
1654 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1655 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1656 | nand->ecc.correct = doc200x_correct_data; | |
1da177e4 | 1657 | |
5bd34c09 | 1658 | nand->ecc.layout = &doc200x_oobinfo; |
6dfc6d25 TG |
1659 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; |
1660 | nand->ecc.size = 512; | |
1661 | nand->ecc.bytes = 6; | |
f75e5097 | 1662 | nand->options = NAND_USE_FLASH_BBT; |
1da177e4 LT |
1663 | |
1664 | doc->physadr = physadr; | |
1665 | doc->virtadr = virtadr; | |
1666 | doc->ChipID = ChipID; | |
1667 | doc->curfloor = -1; | |
1668 | doc->curchip = -1; | |
1669 | doc->mh0_page = -1; | |
1670 | doc->mh1_page = -1; | |
1671 | doc->nextdoc = doclist; | |
1672 | ||
1673 | if (ChipID == DOC_ChipID_Doc2k) | |
1674 | numchips = doc2000_init(mtd); | |
1675 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1676 | numchips = doc2001plus_init(mtd); | |
1677 | else | |
1678 | numchips = doc2001_init(mtd); | |
1679 | ||
1680 | if ((ret = nand_scan(mtd, numchips))) { | |
1681 | /* DBB note: i believe nand_release is necessary here, as | |
1682 | buffers may have been allocated in nand_base. Check with | |
1683 | Thomas. FIX ME! */ | |
1684 | /* nand_release will call del_mtd_device, but we haven't yet | |
1685 | added it. This is handled without incident by | |
1686 | del_mtd_device, as far as I can tell. */ | |
1687 | nand_release(mtd); | |
1688 | kfree(mtd); | |
1689 | goto fail; | |
1690 | } | |
1691 | ||
1692 | /* Success! */ | |
1693 | doclist = mtd; | |
1694 | return 0; | |
1695 | ||
e0c7d767 | 1696 | notfound: |
1da177e4 LT |
1697 | /* Put back the contents of the DOCControl register, in case it's not |
1698 | actually a DiskOnChip. */ | |
1699 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1700 | fail: |
1da177e4 LT |
1701 | iounmap(virtadr); |
1702 | return ret; | |
1703 | } | |
1704 | ||
1705 | static void release_nanddoc(void) | |
1706 | { | |
e0c7d767 | 1707 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1708 | struct nand_chip *nand; |
1709 | struct doc_priv *doc; | |
1710 | ||
1711 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1712 | nand = mtd->priv; | |
1713 | doc = nand->priv; | |
1714 | ||
1715 | nextmtd = doc->nextdoc; | |
1716 | nand_release(mtd); | |
1717 | iounmap(doc->virtadr); | |
1718 | kfree(mtd); | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | static int __init init_nanddoc(void) | |
1723 | { | |
1724 | int i, ret = 0; | |
1725 | ||
1726 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1727 | * This way we have it handy, if an error happens |
1da177e4 LT |
1728 | * |
1729 | * Symbolsize is 10 (bits) | |
1730 | * Primitve polynomial is x^10+x^3+1 | |
1731 | * first consecutive root is 510 | |
1732 | * primitve element to generate roots = 1 | |
1733 | * generator polinomial degree = 4 | |
1734 | */ | |
1735 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1736 | if (!rs_decoder) { |
1737 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1738 | return -ENOMEM; |
1739 | } | |
1740 | ||
1741 | if (doc_config_location) { | |
1742 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1743 | ret = doc_probe(doc_config_location); | |
1744 | if (ret < 0) | |
1745 | goto outerr; | |
1746 | } else { | |
e0c7d767 | 1747 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1748 | doc_probe(doc_locations[i]); |
1749 | } | |
1750 | } | |
1751 | /* No banner message any more. Print a message if no DiskOnChip | |
1752 | found, so the user knows we at least tried. */ | |
1753 | if (!doclist) { | |
1754 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1755 | ret = -ENODEV; | |
1756 | goto outerr; | |
1757 | } | |
1758 | return 0; | |
e0c7d767 | 1759 | outerr: |
1da177e4 LT |
1760 | free_rs(rs_decoder); |
1761 | return ret; | |
1762 | } | |
1763 | ||
1764 | static void __exit cleanup_nanddoc(void) | |
1765 | { | |
1766 | /* Cleanup the nand/DoC resources */ | |
1767 | release_nanddoc(); | |
1768 | ||
1769 | /* Free the reed solomon resources */ | |
1770 | if (rs_decoder) { | |
1771 | free_rs(rs_decoder); | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | module_init(init_nanddoc); | |
1776 | module_exit(cleanup_nanddoc); | |
1777 | ||
1778 | MODULE_LICENSE("GPL"); | |
1779 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1780 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); |