Commit | Line | Data |
---|---|---|
61b03bd7 | 1 | /* |
1da177e4 LT |
2 | * drivers/mtd/nand/diskonchip.c |
3 | * | |
4 | * (C) 2003 Red Hat, Inc. | |
5 | * (C) 2004 Dan Brown <dan_brown@ieee.org> | |
6 | * (C) 2004 Kalev Lember <kalev@smartlink.ee> | |
7 | * | |
8 | * Author: David Woodhouse <dwmw2@infradead.org> | |
9 | * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org> | |
10 | * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee> | |
61b03bd7 | 11 | * |
1da177e4 | 12 | * Error correction code lifted from the old docecc code |
61b03bd7 | 13 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) |
1da177e4 LT |
14 | * Copyright (C) 2000 Netgem S.A. |
15 | * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de> | |
61b03bd7 | 16 | * |
1da177e4 | 17 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
1da177e4 LT |
18 | */ |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/rslib.h> | |
25 | #include <linux/moduleparam.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
2584cf83 | 27 | #include <linux/io.h> |
1da177e4 LT |
28 | |
29 | #include <linux/mtd/mtd.h> | |
30 | #include <linux/mtd/nand.h> | |
31 | #include <linux/mtd/doc2000.h> | |
1da177e4 LT |
32 | #include <linux/mtd/partitions.h> |
33 | #include <linux/mtd/inftl.h> | |
a0e5cc58 | 34 | #include <linux/module.h> |
1da177e4 LT |
35 | |
36 | /* Where to look for the devices? */ | |
651078ba TG |
37 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
38 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
1da177e4 LT |
39 | #endif |
40 | ||
14a95b8a | 41 | static unsigned long doc_locations[] __initdata = { |
1da177e4 | 42 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) |
651078ba | 43 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
61b03bd7 | 44 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
1da177e4 | 45 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
61b03bd7 TG |
46 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
47 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
1da177e4 | 48 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
9d403496 | 49 | #else |
61b03bd7 | 50 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
1da177e4 | 51 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
61b03bd7 TG |
52 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
53 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
1da177e4 | 54 | 0xe8000, 0xea000, 0xec000, 0xee000, |
9d403496 | 55 | #endif |
1da177e4 LT |
56 | #endif |
57 | 0xffffffff }; | |
58 | ||
59 | static struct mtd_info *doclist = NULL; | |
60 | ||
61 | struct doc_priv { | |
62 | void __iomem *virtadr; | |
63 | unsigned long physadr; | |
64 | u_char ChipID; | |
65 | u_char CDSNControl; | |
e0c7d767 | 66 | int chips_per_floor; /* The number of chips detected on each floor */ |
1da177e4 LT |
67 | int curfloor; |
68 | int curchip; | |
69 | int mh0_page; | |
70 | int mh1_page; | |
71 | struct mtd_info *nextdoc; | |
d24fe0c3 BN |
72 | |
73 | /* Handle the last stage of initialization (BBT scan, partitioning) */ | |
74 | int (*late_init)(struct mtd_info *mtd); | |
1da177e4 LT |
75 | }; |
76 | ||
1da177e4 LT |
77 | /* This is the ecc value computed by the HW ecc generator upon writing an empty |
78 | page, one with all 0xff for data. */ | |
79 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
80 | ||
81 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
82 | ||
83 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
84 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
85 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
86 | ||
7abd3ef9 TG |
87 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
88 | unsigned int bitmask); | |
1da177e4 LT |
89 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
90 | ||
e0c7d767 | 91 | static int debug = 0; |
1da177e4 LT |
92 | module_param(debug, int, 0); |
93 | ||
e0c7d767 | 94 | static int try_dword = 1; |
1da177e4 LT |
95 | module_param(try_dword, int, 0); |
96 | ||
e0c7d767 | 97 | static int no_ecc_failures = 0; |
1da177e4 LT |
98 | module_param(no_ecc_failures, int, 0); |
99 | ||
e0c7d767 | 100 | static int no_autopart = 0; |
1da177e4 | 101 | module_param(no_autopart, int, 0); |
1a78ff6b | 102 | |
e0c7d767 | 103 | static int show_firmware_partition = 0; |
1a78ff6b | 104 | module_param(show_firmware_partition, int, 0); |
1da177e4 | 105 | |
89e2bf61 | 106 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE |
e0c7d767 | 107 | static int inftl_bbt_write = 1; |
1da177e4 | 108 | #else |
e0c7d767 | 109 | static int inftl_bbt_write = 0; |
1da177e4 LT |
110 | #endif |
111 | module_param(inftl_bbt_write, int, 0); | |
112 | ||
651078ba | 113 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
114 | module_param(doc_config_location, ulong, 0); |
115 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
116 | ||
1da177e4 LT |
117 | /* Sector size for HW ECC */ |
118 | #define SECTOR_SIZE 512 | |
119 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
120 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
121 | /* Number of roots */ | |
122 | #define NROOTS 4 | |
123 | /* First consective root */ | |
124 | #define FCR 510 | |
125 | /* Number of symbols */ | |
126 | #define NN 1023 | |
127 | ||
128 | /* the Reed Solomon control structure */ | |
129 | static struct rs_control *rs_decoder; | |
130 | ||
61b03bd7 | 131 | /* |
1da177e4 | 132 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
7854d3f7 | 133 | * which we must convert to a standard syndrome usable by the generic |
1da177e4 LT |
134 | * Reed-Solomon library code. |
135 | * | |
136 | * Fabrice Bellard figured this out in the old docecc code. I added | |
137 | * some comments, improved a minor bit and converted it to make use | |
25985edc | 138 | * of the generic Reed-Solomon library. tglx |
1da177e4 | 139 | */ |
e0c7d767 | 140 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
141 | { |
142 | int i, j, nerr, errpos[8]; | |
143 | uint8_t parity; | |
144 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
145 | ||
c9fb6773 | 146 | memset(syn, 0, sizeof(syn)); |
1da177e4 LT |
147 | /* Convert the ecc bytes into words */ |
148 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
149 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
150 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
151 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
152 | parity = ecc[1]; | |
153 | ||
7854d3f7 | 154 | /* Initialize the syndrome buffer */ |
1da177e4 LT |
155 | for (i = 0; i < NROOTS; i++) |
156 | s[i] = ds[0]; | |
61b03bd7 TG |
157 | /* |
158 | * Evaluate | |
1da177e4 LT |
159 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
160 | * where x = alpha^(FCR + i) | |
161 | */ | |
e0c7d767 DW |
162 | for (j = 1; j < NROOTS; j++) { |
163 | if (ds[j] == 0) | |
1da177e4 LT |
164 | continue; |
165 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 166 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
167 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
168 | } | |
169 | ||
c9fb6773 | 170 | /* Calc syn[i] = s[i] / alpha^(v + i) */ |
1da177e4 | 171 | for (i = 0; i < NROOTS; i++) { |
c9fb6773 | 172 | if (s[i]) |
e0c7d767 | 173 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
174 | } |
175 | /* Call the decoder library */ | |
176 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
177 | ||
178 | /* Incorrectable errors ? */ | |
179 | if (nerr < 0) | |
180 | return nerr; | |
181 | ||
61b03bd7 | 182 | /* |
1da177e4 LT |
183 | * Correct the errors. The bitpositions are a bit of magic, |
184 | * but they are given by the design of the de/encoder circuit | |
185 | * in the DoC ASIC's. | |
186 | */ | |
e0c7d767 | 187 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
188 | int index, bitpos, pos = 1015 - errpos[i]; |
189 | uint8_t val; | |
190 | if (pos >= NB_DATA && pos < 1019) | |
191 | continue; | |
192 | if (pos < NB_DATA) { | |
193 | /* extract bit position (MSB first) */ | |
194 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
195 | /* now correct the following 10 bits. At most two bytes | |
196 | can be modified since pos is even */ | |
197 | index = (pos >> 3) ^ 1; | |
198 | bitpos = pos & 7; | |
e0c7d767 | 199 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
200 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
201 | parity ^= val; | |
202 | if (index < SECTOR_SIZE) | |
203 | data[index] ^= val; | |
204 | } | |
205 | index = ((pos >> 3) + 1) ^ 1; | |
206 | bitpos = (bitpos + 10) & 7; | |
207 | if (bitpos == 0) | |
208 | bitpos = 8; | |
e0c7d767 DW |
209 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
210 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
211 | parity ^= val; |
212 | if (index < SECTOR_SIZE) | |
213 | data[index] ^= val; | |
214 | } | |
215 | } | |
216 | } | |
217 | /* If the parity is wrong, no rescue possible */ | |
eb684507 | 218 | return parity ? -EBADMSG : nerr; |
1da177e4 LT |
219 | } |
220 | ||
221 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
222 | { | |
223 | volatile char dummy; | |
224 | int i; | |
61b03bd7 | 225 | |
1da177e4 LT |
226 | for (i = 0; i < cycles; i++) { |
227 | if (DoC_is_Millennium(doc)) | |
228 | dummy = ReadDOC(doc->virtadr, NOP); | |
229 | else if (DoC_is_MillenniumPlus(doc)) | |
230 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
231 | else | |
232 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
233 | } | |
61b03bd7 | 234 | |
1da177e4 LT |
235 | } |
236 | ||
237 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
238 | ||
239 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
240 | static int _DoC_WaitReady(struct doc_priv *doc) | |
241 | { | |
e0c7d767 | 242 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
243 | unsigned long timeo = jiffies + (HZ * 10); |
244 | ||
e0c7d767 DW |
245 | if (debug) |
246 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
247 | /* Out-of-line routine to wait for chip response */ |
248 | if (DoC_is_MillenniumPlus(doc)) { | |
249 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
250 | if (time_after(jiffies, timeo)) { | |
251 | printk("_DoC_WaitReady timed out.\n"); | |
252 | return -EIO; | |
253 | } | |
254 | udelay(1); | |
255 | cond_resched(); | |
256 | } | |
257 | } else { | |
258 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
259 | if (time_after(jiffies, timeo)) { | |
260 | printk("_DoC_WaitReady timed out.\n"); | |
261 | return -EIO; | |
262 | } | |
263 | udelay(1); | |
264 | cond_resched(); | |
265 | } | |
266 | } | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
271 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
272 | { | |
e0c7d767 | 273 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
274 | int ret = 0; |
275 | ||
276 | if (DoC_is_MillenniumPlus(doc)) { | |
277 | DoC_Delay(doc, 4); | |
278 | ||
279 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
280 | /* Call the out-of-line routine to wait */ | |
281 | ret = _DoC_WaitReady(doc); | |
282 | } else { | |
283 | DoC_Delay(doc, 4); | |
284 | ||
285 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
286 | /* Call the out-of-line routine to wait */ | |
287 | ret = _DoC_WaitReady(doc); | |
288 | DoC_Delay(doc, 2); | |
289 | } | |
290 | ||
e0c7d767 DW |
291 | if (debug) |
292 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
293 | return ret; |
294 | } | |
295 | ||
296 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
297 | { | |
4bd4ebcc | 298 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 299 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 300 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 301 | |
e0c7d767 DW |
302 | if (debug) |
303 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
304 | WriteDOC(datum, docptr, CDSNSlowIO); |
305 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
306 | } | |
307 | ||
308 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
309 | { | |
4bd4ebcc | 310 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 311 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 312 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
313 | u_char ret; |
314 | ||
315 | ReadDOC(docptr, CDSNSlowIO); | |
316 | DoC_Delay(doc, 2); | |
317 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
318 | if (debug) |
319 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
320 | return ret; |
321 | } | |
322 | ||
e0c7d767 | 323 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 | 324 | { |
4bd4ebcc | 325 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 326 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 327 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 328 | int i; |
e0c7d767 DW |
329 | if (debug) |
330 | printk("writebuf of %d bytes: ", len); | |
331 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
332 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
333 | if (debug && i < 16) | |
334 | printk("%02x ", buf[i]); | |
335 | } | |
e0c7d767 DW |
336 | if (debug) |
337 | printk("\n"); | |
1da177e4 LT |
338 | } |
339 | ||
e0c7d767 | 340 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 | 341 | { |
4bd4ebcc | 342 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 343 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 DW |
344 | void __iomem *docptr = doc->virtadr; |
345 | int i; | |
1da177e4 | 346 | |
e0c7d767 DW |
347 | if (debug) |
348 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 349 | |
e0c7d767 | 350 | for (i = 0; i < len; i++) { |
1da177e4 LT |
351 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
352 | } | |
353 | } | |
354 | ||
e0c7d767 | 355 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 | 356 | { |
4bd4ebcc | 357 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 358 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 DW |
359 | void __iomem *docptr = doc->virtadr; |
360 | int i; | |
1da177e4 | 361 | |
e0c7d767 DW |
362 | if (debug) |
363 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 364 | |
e0c7d767 DW |
365 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
366 | for (i = 0; i < len; i++) { | |
367 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 LT |
368 | } |
369 | } else { | |
e0c7d767 DW |
370 | for (i = 0; i < len; i += 4) { |
371 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
372 | } |
373 | } | |
374 | } | |
375 | ||
1da177e4 LT |
376 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) |
377 | { | |
4bd4ebcc | 378 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 379 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
380 | uint16_t ret; |
381 | ||
382 | doc200x_select_chip(mtd, nr); | |
7abd3ef9 TG |
383 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
384 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
385 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
386 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 387 | |
e9c54999 | 388 | /* We can't use dev_ready here, but at least we wait for the |
61b03bd7 | 389 | * command to complete |
dfd61294 TG |
390 | */ |
391 | udelay(50); | |
61b03bd7 | 392 | |
1da177e4 LT |
393 | ret = this->read_byte(mtd) << 8; |
394 | ret |= this->read_byte(mtd); | |
395 | ||
396 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
397 | /* First chip probe. See if we get same results by 32-bit access */ | |
398 | union { | |
399 | uint32_t dword; | |
400 | uint8_t byte[4]; | |
401 | } ident; | |
402 | void __iomem *docptr = doc->virtadr; | |
403 | ||
7abd3ef9 TG |
404 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
405 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
406 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
407 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
408 | NAND_NCE | NAND_CTRL_CHANGE); | |
1da177e4 | 409 | |
dfd61294 TG |
410 | udelay(50); |
411 | ||
1da177e4 LT |
412 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
413 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
414 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
415 | this->read_buf = &doc2000_readbuf_dword; | |
416 | } | |
417 | } | |
61b03bd7 | 418 | |
1da177e4 LT |
419 | return ret; |
420 | } | |
421 | ||
422 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
423 | { | |
4bd4ebcc | 424 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 425 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
426 | uint16_t mfrid; |
427 | int i; | |
428 | ||
429 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
430 | doc->chips_per_floor = 4; | |
431 | ||
432 | /* Find out what the first chip is */ | |
433 | mfrid = doc200x_ident_chip(mtd, 0); | |
434 | ||
435 | /* Find how many chips in each floor. */ | |
436 | for (i = 1; i < 4; i++) { | |
437 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
438 | break; | |
439 | } | |
440 | doc->chips_per_floor = i; | |
441 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
442 | } | |
443 | ||
7bc3312b | 444 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 | 445 | { |
d699ed25 | 446 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
447 | |
448 | int status; | |
61b03bd7 | 449 | |
1da177e4 LT |
450 | DoC_WaitReady(doc); |
451 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
452 | DoC_WaitReady(doc); | |
453 | status = (int)this->read_byte(mtd); | |
454 | ||
455 | return status; | |
456 | } | |
457 | ||
458 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
459 | { | |
4bd4ebcc | 460 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 461 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 462 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
463 | |
464 | WriteDOC(datum, docptr, CDSNSlowIO); | |
465 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
466 | WriteDOC(datum, docptr, WritePipeTerm); | |
467 | } | |
468 | ||
469 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
470 | { | |
4bd4ebcc | 471 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 472 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 473 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
474 | |
475 | //ReadDOC(docptr, CDSNSlowIO); | |
476 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
477 | DoC_Delay(doc, 2); | |
478 | ReadDOC(docptr, ReadPipeInit); | |
479 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
480 | return ReadDOC(docptr, LastDataRead); | |
481 | } | |
482 | ||
e0c7d767 | 483 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 | 484 | { |
4bd4ebcc | 485 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 486 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 487 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
488 | int i; |
489 | ||
e0c7d767 | 490 | for (i = 0; i < len; i++) |
1da177e4 LT |
491 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
492 | /* Terminate write pipeline */ | |
493 | WriteDOC(0x00, docptr, WritePipeTerm); | |
494 | } | |
495 | ||
e0c7d767 | 496 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 | 497 | { |
4bd4ebcc | 498 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 499 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 500 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
501 | int i; |
502 | ||
503 | /* Start read pipeline */ | |
504 | ReadDOC(docptr, ReadPipeInit); | |
505 | ||
e0c7d767 | 506 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
507 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
508 | ||
509 | /* Terminate read pipeline */ | |
510 | buf[i] = ReadDOC(docptr, LastDataRead); | |
511 | } | |
512 | ||
1da177e4 LT |
513 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) |
514 | { | |
4bd4ebcc | 515 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 516 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 517 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
518 | u_char ret; |
519 | ||
e0c7d767 DW |
520 | ReadDOC(docptr, Mplus_ReadPipeInit); |
521 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
522 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
523 | if (debug) | |
524 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
525 | return ret; |
526 | } | |
527 | ||
e0c7d767 | 528 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 | 529 | { |
4bd4ebcc | 530 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 531 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 532 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
533 | int i; |
534 | ||
e0c7d767 DW |
535 | if (debug) |
536 | printk("writebuf of %d bytes: ", len); | |
537 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
538 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
539 | if (debug && i < 16) | |
540 | printk("%02x ", buf[i]); | |
541 | } | |
e0c7d767 DW |
542 | if (debug) |
543 | printk("\n"); | |
1da177e4 LT |
544 | } |
545 | ||
e0c7d767 | 546 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 | 547 | { |
4bd4ebcc | 548 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 549 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 550 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
551 | int i; |
552 | ||
e0c7d767 DW |
553 | if (debug) |
554 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
555 | |
556 | /* Start read pipeline */ | |
557 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
558 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
559 | ||
e0c7d767 | 560 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
561 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
562 | if (debug && i < 16) | |
563 | printk("%02x ", buf[i]); | |
564 | } | |
565 | ||
566 | /* Terminate read pipeline */ | |
e0c7d767 | 567 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 568 | if (debug && i < 16) |
e0c7d767 DW |
569 | printk("%02x ", buf[len - 2]); |
570 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 571 | if (debug && i < 16) |
e0c7d767 DW |
572 | printk("%02x ", buf[len - 1]); |
573 | if (debug) | |
574 | printk("\n"); | |
1da177e4 LT |
575 | } |
576 | ||
1da177e4 LT |
577 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) |
578 | { | |
4bd4ebcc | 579 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 580 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 581 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
582 | int floor = 0; |
583 | ||
e0c7d767 DW |
584 | if (debug) |
585 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
586 | |
587 | if (chip == -1) { | |
588 | /* Disable flash internally */ | |
589 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
590 | return; | |
591 | } | |
592 | ||
593 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 594 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
595 | |
596 | /* Assert ChipEnable and deassert WriteProtect */ | |
597 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
598 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
599 | ||
600 | doc->curchip = chip; | |
601 | doc->curfloor = floor; | |
602 | } | |
603 | ||
604 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
605 | { | |
4bd4ebcc | 606 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 607 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 608 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
609 | int floor = 0; |
610 | ||
e0c7d767 DW |
611 | if (debug) |
612 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
613 | |
614 | if (chip == -1) | |
615 | return; | |
616 | ||
617 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 618 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
619 | |
620 | /* 11.4.4 -- deassert CE before changing chip */ | |
7abd3ef9 | 621 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
622 | |
623 | WriteDOC(floor, docptr, FloorSelect); | |
624 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
625 | ||
7abd3ef9 | 626 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
627 | |
628 | doc->curchip = chip; | |
629 | doc->curfloor = floor; | |
630 | } | |
631 | ||
7abd3ef9 TG |
632 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
633 | ||
634 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
635 | unsigned int ctrl) | |
1da177e4 | 636 | { |
4bd4ebcc | 637 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 638 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 639 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 640 | |
7abd3ef9 TG |
641 | if (ctrl & NAND_CTRL_CHANGE) { |
642 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
643 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
644 | if (debug) | |
645 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
646 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
647 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
648 | DoC_Delay(doc, 4); | |
1da177e4 | 649 | } |
cad74f2c TG |
650 | if (cmd != NAND_CMD_NONE) { |
651 | if (DoC_is_2000(doc)) | |
652 | doc2000_write_byte(mtd, cmd); | |
653 | else | |
654 | doc2001_write_byte(mtd, cmd); | |
655 | } | |
1da177e4 LT |
656 | } |
657 | ||
e0c7d767 | 658 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 | 659 | { |
4bd4ebcc | 660 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 661 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 662 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
663 | |
664 | /* | |
665 | * Must terminate write pipeline before sending any commands | |
666 | * to the device. | |
667 | */ | |
668 | if (command == NAND_CMD_PAGEPROG) { | |
669 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
670 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
671 | } | |
672 | ||
673 | /* | |
674 | * Write out the command to the device. | |
675 | */ | |
676 | if (command == NAND_CMD_SEQIN) { | |
677 | int readcmd; | |
678 | ||
28318776 | 679 | if (column >= mtd->writesize) { |
1da177e4 | 680 | /* OOB area */ |
28318776 | 681 | column -= mtd->writesize; |
1da177e4 LT |
682 | readcmd = NAND_CMD_READOOB; |
683 | } else if (column < 256) { | |
684 | /* First 256 bytes --> READ0 */ | |
685 | readcmd = NAND_CMD_READ0; | |
686 | } else { | |
687 | column -= 256; | |
688 | readcmd = NAND_CMD_READ1; | |
689 | } | |
690 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
691 | } | |
692 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
693 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
694 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
695 | ||
696 | if (column != -1 || page_addr != -1) { | |
697 | /* Serially input address */ | |
698 | if (column != -1) { | |
699 | /* Adjust columns for 16 bit buswidth */ | |
3dad2344 BN |
700 | if (this->options & NAND_BUSWIDTH_16 && |
701 | !nand_opcode_8bits(command)) | |
1da177e4 LT |
702 | column >>= 1; |
703 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
704 | } | |
705 | if (page_addr != -1) { | |
e0c7d767 DW |
706 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
707 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
708 | /* One more address cycle for higher density devices */ |
709 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 710 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
711 | printk("high density\n"); |
712 | } | |
713 | } | |
714 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
715 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
716 | /* deassert ALE */ | |
e0c7d767 DW |
717 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
718 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
719 | WriteDOC(0, docptr, Mplus_FlashControl); |
720 | } | |
721 | ||
61b03bd7 | 722 | /* |
1da177e4 LT |
723 | * program and erase have their own busy handlers |
724 | * status and sequential in needs no delay | |
e0c7d767 | 725 | */ |
1da177e4 LT |
726 | switch (command) { |
727 | ||
728 | case NAND_CMD_PAGEPROG: | |
729 | case NAND_CMD_ERASE1: | |
730 | case NAND_CMD_ERASE2: | |
731 | case NAND_CMD_SEQIN: | |
732 | case NAND_CMD_STATUS: | |
733 | return; | |
734 | ||
735 | case NAND_CMD_RESET: | |
736 | if (this->dev_ready) | |
737 | break; | |
738 | udelay(this->chip_delay); | |
739 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
740 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
741 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 742 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
743 | return; |
744 | ||
e0c7d767 | 745 | /* This applies to read commands */ |
1da177e4 | 746 | default: |
61b03bd7 | 747 | /* |
1da177e4 LT |
748 | * If we don't have access to the busy pin, we apply the given |
749 | * command delay | |
e0c7d767 | 750 | */ |
1da177e4 | 751 | if (!this->dev_ready) { |
e0c7d767 | 752 | udelay(this->chip_delay); |
1da177e4 LT |
753 | return; |
754 | } | |
755 | } | |
756 | ||
757 | /* Apply this short delay always to ensure that we do wait tWB in | |
758 | * any case on any machine. */ | |
e0c7d767 | 759 | ndelay(100); |
1da177e4 | 760 | /* wait until command is processed */ |
e0c7d767 | 761 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
762 | } |
763 | ||
764 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
765 | { | |
4bd4ebcc | 766 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 767 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 768 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
769 | |
770 | if (DoC_is_MillenniumPlus(doc)) { | |
771 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
772 | DoC_Delay(doc, 4); | |
773 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 774 | if (debug) |
1da177e4 LT |
775 | printk("not ready\n"); |
776 | return 0; | |
777 | } | |
e0c7d767 DW |
778 | if (debug) |
779 | printk("was ready\n"); | |
1da177e4 LT |
780 | return 1; |
781 | } else { | |
782 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
783 | DoC_Delay(doc, 4); | |
784 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 785 | if (debug) |
1da177e4 LT |
786 | printk("not ready\n"); |
787 | return 0; | |
788 | } | |
789 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
790 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
791 | if (debug) |
792 | printk("was ready\n"); | |
1da177e4 LT |
793 | return 1; |
794 | } | |
795 | } | |
796 | ||
9f3e0429 | 797 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs) |
1da177e4 LT |
798 | { |
799 | /* This is our last resort if we couldn't find or create a BBT. Just | |
800 | pretend all blocks are good. */ | |
801 | return 0; | |
802 | } | |
803 | ||
804 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
805 | { | |
4bd4ebcc | 806 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 807 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 808 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
809 | |
810 | /* Prime the ECC engine */ | |
e0c7d767 | 811 | switch (mode) { |
1da177e4 LT |
812 | case NAND_ECC_READ: |
813 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
814 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
815 | break; | |
816 | case NAND_ECC_WRITE: | |
817 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
818 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
819 | break; | |
820 | } | |
821 | } | |
822 | ||
823 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
824 | { | |
4bd4ebcc | 825 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 826 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 827 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
828 | |
829 | /* Prime the ECC engine */ | |
e0c7d767 | 830 | switch (mode) { |
1da177e4 LT |
831 | case NAND_ECC_READ: |
832 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
833 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
834 | break; | |
835 | case NAND_ECC_WRITE: | |
836 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
837 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
838 | break; | |
839 | } | |
840 | } | |
841 | ||
842 | /* This code is only called on write */ | |
e0c7d767 | 843 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 | 844 | { |
4bd4ebcc | 845 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 846 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 847 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
848 | int i; |
849 | int emptymatch = 1; | |
850 | ||
851 | /* flush the pipeline */ | |
852 | if (DoC_is_2000(doc)) { | |
853 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
854 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
855 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
856 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
857 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
858 | } else if (DoC_is_MillenniumPlus(doc)) { | |
859 | WriteDOC(0, docptr, Mplus_NOP); | |
860 | WriteDOC(0, docptr, Mplus_NOP); | |
861 | WriteDOC(0, docptr, Mplus_NOP); | |
862 | } else { | |
863 | WriteDOC(0, docptr, NOP); | |
864 | WriteDOC(0, docptr, NOP); | |
865 | WriteDOC(0, docptr, NOP); | |
866 | } | |
867 | ||
868 | for (i = 0; i < 6; i++) { | |
869 | if (DoC_is_MillenniumPlus(doc)) | |
870 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 871 | else |
1da177e4 LT |
872 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
873 | if (ecc_code[i] != empty_write_ecc[i]) | |
874 | emptymatch = 0; | |
875 | } | |
876 | if (DoC_is_MillenniumPlus(doc)) | |
877 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
878 | else | |
879 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
880 | #if 0 | |
881 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
882 | if (emptymatch) { | |
883 | /* Note: this somewhat expensive test should not be triggered | |
884 | often. It could be optimized away by examining the data in | |
885 | the writebuf routine, and remembering the result. */ | |
886 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
887 | if (dat[i] == 0xff) |
888 | continue; | |
1da177e4 LT |
889 | emptymatch = 0; |
890 | break; | |
891 | } | |
892 | } | |
893 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
894 | Return all-0xff ecc value instead of the computed one, so | |
895 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
896 | if (emptymatch) |
897 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
898 | #endif |
899 | return 0; | |
900 | } | |
901 | ||
f5bbdacc TG |
902 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
903 | u_char *read_ecc, u_char *isnull) | |
1da177e4 LT |
904 | { |
905 | int i, ret = 0; | |
4bd4ebcc | 906 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 907 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 908 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 909 | uint8_t calc_ecc[6]; |
1da177e4 | 910 | volatile u_char dummy; |
61b03bd7 | 911 | |
1da177e4 LT |
912 | /* flush the pipeline */ |
913 | if (DoC_is_2000(doc)) { | |
914 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
915 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
916 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
917 | } else if (DoC_is_MillenniumPlus(doc)) { | |
918 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
919 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
920 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
921 | } else { | |
922 | dummy = ReadDOC(docptr, ECCConf); | |
923 | dummy = ReadDOC(docptr, ECCConf); | |
924 | dummy = ReadDOC(docptr, ECCConf); | |
925 | } | |
61b03bd7 | 926 | |
25985edc | 927 | /* Error occurred ? */ |
1da177e4 LT |
928 | if (dummy & 0x80) { |
929 | for (i = 0; i < 6; i++) { | |
930 | if (DoC_is_MillenniumPlus(doc)) | |
931 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
932 | else | |
933 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
1da177e4 | 934 | } |
cc01e607 BB |
935 | |
936 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
937 | if (ret > 0) |
938 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 939 | } |
1da177e4 LT |
940 | if (DoC_is_MillenniumPlus(doc)) |
941 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
942 | else | |
943 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
d57f4054 | 944 | if (no_ecc_failures && mtd_is_eccerr(ret)) { |
1da177e4 LT |
945 | printk(KERN_ERR "suppressing ECC failure\n"); |
946 | ret = 0; | |
947 | } | |
948 | return ret; | |
949 | } | |
61b03bd7 | 950 | |
1da177e4 LT |
951 | //u_char mydatabuf[528]; |
952 | ||
68c1b754 BB |
953 | static int doc200x_ooblayout_ecc(struct mtd_info *mtd, int section, |
954 | struct mtd_oob_region *oobregion) | |
955 | { | |
956 | if (section) | |
957 | return -ERANGE; | |
958 | ||
959 | oobregion->offset = 0; | |
960 | oobregion->length = 6; | |
961 | ||
962 | return 0; | |
963 | } | |
964 | ||
965 | static int doc200x_ooblayout_free(struct mtd_info *mtd, int section, | |
966 | struct mtd_oob_region *oobregion) | |
967 | { | |
968 | if (section > 1) | |
969 | return -ERANGE; | |
970 | ||
971 | /* | |
972 | * The strange out-of-order free bytes definition is a (possibly | |
973 | * unneeded) attempt to retain compatibility. It used to read: | |
974 | * .oobfree = { {8, 8} } | |
975 | * Since that leaves two bytes unusable, it was changed. But the | |
976 | * following scheme might affect existing jffs2 installs by moving the | |
977 | * cleanmarker: | |
978 | * .oobfree = { {6, 10} } | |
979 | * jffs2 seems to handle the above gracefully, but the current scheme | |
980 | * seems safer. The only problem with it is that any code retrieving | |
981 | * free bytes position must be able to handle out-of-order segments. | |
982 | */ | |
983 | if (!section) { | |
984 | oobregion->offset = 8; | |
985 | oobregion->length = 8; | |
986 | } else { | |
987 | oobregion->offset = 6; | |
988 | oobregion->length = 2; | |
989 | } | |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | static const struct mtd_ooblayout_ops doc200x_ooblayout_ops = { | |
995 | .ecc = doc200x_ooblayout_ecc, | |
996 | .free = doc200x_ooblayout_free, | |
1da177e4 | 997 | }; |
61b03bd7 | 998 | |
1da177e4 | 999 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
af901ca1 | 1000 | On successful return, buf will contain a copy of the media header for |
1da177e4 LT |
1001 | further processing. id is the string to scan for, and will presumably be |
1002 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1003 | header. The page #s of the found media headers are placed in mh0_page and | |
1004 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1005 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 | 1006 | { |
4bd4ebcc | 1007 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1008 | struct doc_priv *doc = nand_get_controller_data(this); |
1a78ff6b | 1009 | unsigned offs; |
1da177e4 LT |
1010 | int ret; |
1011 | size_t retlen; | |
1012 | ||
1a78ff6b | 1013 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
329ad399 | 1014 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 1015 | if (retlen != mtd->writesize) |
e0c7d767 | 1016 | continue; |
1da177e4 | 1017 | if (ret) { |
e0c7d767 | 1018 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1019 | } |
e0c7d767 DW |
1020 | if (memcmp(buf, id, 6)) |
1021 | continue; | |
1da177e4 LT |
1022 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1023 | if (doc->mh0_page == -1) { | |
1024 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1025 | if (!findmirror) |
1026 | return 1; | |
1da177e4 LT |
1027 | continue; |
1028 | } | |
1029 | doc->mh1_page = offs >> this->page_shift; | |
1030 | return 2; | |
1031 | } | |
1032 | if (doc->mh0_page == -1) { | |
1033 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1034 | return 0; | |
1035 | } | |
1036 | /* Only one mediaheader was found. We want buf to contain a | |
1037 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1038 | offs = doc->mh0_page << this->page_shift; | |
329ad399 | 1039 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 1040 | if (retlen != mtd->writesize) { |
1da177e4 LT |
1041 | /* Insanity. Give up. */ |
1042 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1043 | return 0; | |
1044 | } | |
1045 | return 1; | |
1046 | } | |
1047 | ||
e0c7d767 | 1048 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 | 1049 | { |
4bd4ebcc | 1050 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1051 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
1052 | int ret = 0; |
1053 | u_char *buf; | |
1054 | struct NFTLMediaHeader *mh; | |
1055 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1056 | int numparts = 0; |
1da177e4 LT |
1057 | unsigned blocks, maxblocks; |
1058 | int offs, numheaders; | |
1059 | ||
28318776 | 1060 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 | 1061 | if (!buf) { |
1da177e4 LT |
1062 | return 0; |
1063 | } | |
e0c7d767 DW |
1064 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1065 | goto out; | |
1066 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1067 | |
96372446 HH |
1068 | le16_to_cpus(&mh->NumEraseUnits); |
1069 | le16_to_cpus(&mh->FirstPhysicalEUN); | |
1070 | le32_to_cpus(&mh->FormattedSize); | |
f29a4b86 | 1071 | |
1da177e4 LT |
1072 | printk(KERN_INFO " DataOrgID = %s\n" |
1073 | " NumEraseUnits = %d\n" | |
1074 | " FirstPhysicalEUN = %d\n" | |
1075 | " FormattedSize = %d\n" | |
1076 | " UnitSizeFactor = %d\n", | |
1077 | mh->DataOrgID, mh->NumEraseUnits, | |
1078 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1079 | mh->UnitSizeFactor); | |
1da177e4 LT |
1080 | |
1081 | blocks = mtd->size >> this->phys_erase_shift; | |
1082 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1083 | ||
1084 | if (mh->UnitSizeFactor == 0x00) { | |
1085 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1086 | - There can be at most 32768 virtual blocks. | |
1087 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1088 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1089 | */ | |
1da177e4 LT |
1090 | mh->UnitSizeFactor = 0xff; |
1091 | while (blocks > maxblocks) { | |
1092 | blocks >>= 1; | |
1093 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1094 | mh->UnitSizeFactor--; | |
1095 | } | |
1096 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1097 | } | |
1098 | ||
1099 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1100 | layers; variables with have already been configured by nand_scan. | |
1101 | Unfortunately, we didn't know before this point what these values | |
25985edc | 1102 | should be. Thus, this code is somewhat dependent on the exact |
1da177e4 LT |
1103 | implementation of the NAND layer. */ |
1104 | if (mh->UnitSizeFactor != 0xff) { | |
1105 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1106 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1107 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1108 | blocks = mtd->size >> this->bbt_erase_shift; | |
1109 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1110 | } | |
1111 | ||
1112 | if (blocks > maxblocks) { | |
1113 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1114 | goto out; | |
1115 | } | |
1116 | ||
1117 | /* Skip past the media headers. */ | |
1118 | offs = max(doc->mh0_page, doc->mh1_page); | |
1119 | offs <<= this->page_shift; | |
1120 | offs += mtd->erasesize; | |
1121 | ||
1a78ff6b DB |
1122 | if (show_firmware_partition == 1) { |
1123 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1124 | parts[0].offset = 0; | |
1125 | parts[0].size = offs; | |
1126 | numparts = 1; | |
1127 | } | |
1128 | ||
1129 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1130 | parts[numparts].offset = offs; | |
1131 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1132 | ||
1133 | offs += parts[numparts].size; | |
1134 | numparts++; | |
1da177e4 | 1135 | |
1da177e4 | 1136 | if (offs < mtd->size) { |
1a78ff6b DB |
1137 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1138 | parts[numparts].offset = offs; | |
1139 | parts[numparts].size = mtd->size - offs; | |
1140 | numparts++; | |
1da177e4 | 1141 | } |
1a78ff6b DB |
1142 | |
1143 | ret = numparts; | |
e0c7d767 | 1144 | out: |
1da177e4 LT |
1145 | kfree(buf); |
1146 | return ret; | |
1147 | } | |
1148 | ||
1149 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1150 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 | 1151 | { |
4bd4ebcc | 1152 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1153 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
1154 | int ret = 0; |
1155 | u_char *buf; | |
1156 | struct INFTLMediaHeader *mh; | |
1157 | struct INFTLPartition *ip; | |
1158 | int numparts = 0; | |
1159 | int blocks; | |
1160 | int vshift, lastvunit = 0; | |
1161 | int i; | |
1162 | int end = mtd->size; | |
1163 | ||
1164 | if (inftl_bbt_write) | |
1165 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1166 | ||
28318776 | 1167 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 | 1168 | if (!buf) { |
1da177e4 LT |
1169 | return 0; |
1170 | } | |
1171 | ||
e0c7d767 DW |
1172 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1173 | goto out; | |
1da177e4 | 1174 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1175 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 | 1176 | |
96372446 HH |
1177 | le32_to_cpus(&mh->NoOfBootImageBlocks); |
1178 | le32_to_cpus(&mh->NoOfBinaryPartitions); | |
1179 | le32_to_cpus(&mh->NoOfBDTLPartitions); | |
1180 | le32_to_cpus(&mh->BlockMultiplierBits); | |
1181 | le32_to_cpus(&mh->FormatFlags); | |
1182 | le32_to_cpus(&mh->PercentUsed); | |
61b03bd7 | 1183 | |
1da177e4 LT |
1184 | printk(KERN_INFO " bootRecordID = %s\n" |
1185 | " NoOfBootImageBlocks = %d\n" | |
1186 | " NoOfBinaryPartitions = %d\n" | |
1187 | " NoOfBDTLPartitions = %d\n" | |
1188 | " BlockMultiplerBits = %d\n" | |
1189 | " FormatFlgs = %d\n" | |
1190 | " OsakVersion = %d.%d.%d.%d\n" | |
1191 | " PercentUsed = %d\n", | |
1192 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1193 | mh->NoOfBinaryPartitions, | |
1194 | mh->NoOfBDTLPartitions, | |
1195 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1196 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1197 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1198 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1199 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1200 | mh->PercentUsed); | |
1da177e4 LT |
1201 | |
1202 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1203 | ||
1204 | blocks = mtd->size >> vshift; | |
1205 | if (blocks > 32768) { | |
1206 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1207 | goto out; | |
1208 | } | |
1209 | ||
1210 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1211 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1212 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1213 | goto out; | |
1214 | } | |
1215 | ||
1216 | /* Scan the partitions */ | |
1217 | for (i = 0; (i < 4); i++) { | |
1218 | ip = &(mh->Partitions[i]); | |
96372446 HH |
1219 | le32_to_cpus(&ip->virtualUnits); |
1220 | le32_to_cpus(&ip->firstUnit); | |
1221 | le32_to_cpus(&ip->lastUnit); | |
1222 | le32_to_cpus(&ip->flags); | |
1223 | le32_to_cpus(&ip->spareUnits); | |
1224 | le32_to_cpus(&ip->Reserved0); | |
1da177e4 | 1225 | |
1da177e4 LT |
1226 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1227 | " virtualUnits = %d\n" | |
1228 | " firstUnit = %d\n" | |
1229 | " lastUnit = %d\n" | |
1230 | " flags = 0x%x\n" | |
1231 | " spareUnits = %d\n", | |
1232 | i, ip->virtualUnits, ip->firstUnit, | |
1233 | ip->lastUnit, ip->flags, | |
1234 | ip->spareUnits); | |
1da177e4 | 1235 | |
1a78ff6b DB |
1236 | if ((show_firmware_partition == 1) && |
1237 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1238 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1239 | parts[0].offset = 0; | |
1240 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1241 | numparts = 1; | |
1242 | } | |
1da177e4 LT |
1243 | |
1244 | if (ip->flags & INFTL_BINARY) | |
1245 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1246 | else | |
1247 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1248 | parts[numparts].offset = ip->firstUnit << vshift; | |
1249 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1250 | numparts++; | |
e0c7d767 DW |
1251 | if (ip->lastUnit > lastvunit) |
1252 | lastvunit = ip->lastUnit; | |
1253 | if (ip->flags & INFTL_LAST) | |
1254 | break; | |
1da177e4 LT |
1255 | } |
1256 | lastvunit++; | |
1257 | if ((lastvunit << vshift) < end) { | |
1258 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1259 | parts[numparts].offset = lastvunit << vshift; | |
1260 | parts[numparts].size = end - parts[numparts].offset; | |
1261 | numparts++; | |
1262 | } | |
1263 | ret = numparts; | |
e0c7d767 | 1264 | out: |
1da177e4 LT |
1265 | kfree(buf); |
1266 | return ret; | |
1267 | } | |
1268 | ||
1269 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1270 | { | |
1271 | int ret, numparts; | |
4bd4ebcc | 1272 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1273 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
1274 | struct mtd_partition parts[2]; |
1275 | ||
e0c7d767 | 1276 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1277 | /* On NFTL, we have to find the media headers before we can read the |
1278 | BBTs, since they're stored in the media header eraseblocks. */ | |
1279 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1280 | if (!numparts) |
1281 | return -EIO; | |
1da177e4 LT |
1282 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1283 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1284 | NAND_BBT_VERSION; | |
1285 | this->bbt_td->veroffs = 7; | |
1286 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1287 | if (doc->mh1_page != -1) { | |
1288 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1289 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1290 | NAND_BBT_VERSION; | |
1291 | this->bbt_md->veroffs = 7; | |
1292 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1293 | } else { | |
1294 | this->bbt_md = NULL; | |
1295 | } | |
1296 | ||
d24fe0c3 BN |
1297 | ret = this->scan_bbt(mtd); |
1298 | if (ret) | |
1da177e4 | 1299 | return ret; |
d24fe0c3 | 1300 | |
6a7c7334 | 1301 | return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts); |
1da177e4 LT |
1302 | } |
1303 | ||
1304 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1305 | { | |
1306 | int ret, numparts; | |
4bd4ebcc | 1307 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1308 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
1309 | struct mtd_partition parts[5]; |
1310 | ||
1311 | if (this->numchips > doc->chips_per_floor) { | |
1312 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1313 | return -EIO; | |
1314 | } | |
1315 | ||
1316 | if (DoC_is_MillenniumPlus(doc)) { | |
1317 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1318 | if (inftl_bbt_write) | |
1319 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1320 | this->bbt_td->pages[0] = 2; | |
1321 | this->bbt_md = NULL; | |
1322 | } else { | |
e0c7d767 | 1323 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1324 | if (inftl_bbt_write) |
1325 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1326 | this->bbt_td->offs = 8; | |
1327 | this->bbt_td->len = 8; | |
1328 | this->bbt_td->veroffs = 7; | |
1329 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1330 | this->bbt_td->reserved_block_code = 0x01; | |
1331 | this->bbt_td->pattern = "MSYS_BBT"; | |
1332 | ||
e0c7d767 | 1333 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1334 | if (inftl_bbt_write) |
1335 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1336 | this->bbt_md->offs = 8; | |
1337 | this->bbt_md->len = 8; | |
1338 | this->bbt_md->veroffs = 7; | |
1339 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1340 | this->bbt_md->reserved_block_code = 0x01; | |
1341 | this->bbt_md->pattern = "TBB_SYSM"; | |
1342 | } | |
1343 | ||
d24fe0c3 BN |
1344 | ret = this->scan_bbt(mtd); |
1345 | if (ret) | |
1da177e4 | 1346 | return ret; |
d24fe0c3 | 1347 | |
e0c7d767 | 1348 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1349 | numparts = inftl_partscan(mtd, parts); |
1350 | /* At least for now, require the INFTL Media Header. We could probably | |
1351 | do without it for non-INFTL use, since all it gives us is | |
1352 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1353 | if (!numparts) |
1354 | return -EIO; | |
6a7c7334 | 1355 | return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts); |
1da177e4 LT |
1356 | } |
1357 | ||
1358 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1359 | { | |
4bd4ebcc | 1360 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1361 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 | 1362 | |
1da177e4 LT |
1363 | this->read_byte = doc2000_read_byte; |
1364 | this->write_buf = doc2000_writebuf; | |
1365 | this->read_buf = doc2000_readbuf; | |
d24fe0c3 | 1366 | doc->late_init = nftl_scan_bbt; |
1da177e4 LT |
1367 | |
1368 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1369 | doc2000_count_chips(mtd); | |
1370 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1371 | return (4 * doc->chips_per_floor); | |
1372 | } | |
1373 | ||
1374 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1375 | { | |
4bd4ebcc | 1376 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1377 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 | 1378 | |
1da177e4 LT |
1379 | this->read_byte = doc2001_read_byte; |
1380 | this->write_buf = doc2001_writebuf; | |
1381 | this->read_buf = doc2001_readbuf; | |
1da177e4 LT |
1382 | |
1383 | ReadDOC(doc->virtadr, ChipID); | |
1384 | ReadDOC(doc->virtadr, ChipID); | |
1385 | ReadDOC(doc->virtadr, ChipID); | |
1386 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1387 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1388 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1389 | Treat it like a Millennium, except that it |
1390 | can have multiple chips. */ | |
1391 | doc2000_count_chips(mtd); | |
1392 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
d24fe0c3 | 1393 | doc->late_init = inftl_scan_bbt; |
1da177e4 LT |
1394 | return (4 * doc->chips_per_floor); |
1395 | } else { | |
1396 | /* Bog-standard Millennium */ | |
1397 | doc->chips_per_floor = 1; | |
1398 | mtd->name = "DiskOnChip Millennium"; | |
d24fe0c3 | 1399 | doc->late_init = nftl_scan_bbt; |
1da177e4 LT |
1400 | return 1; |
1401 | } | |
1402 | } | |
1403 | ||
1404 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1405 | { | |
4bd4ebcc | 1406 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1407 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 | 1408 | |
1da177e4 LT |
1409 | this->read_byte = doc2001plus_read_byte; |
1410 | this->write_buf = doc2001plus_writebuf; | |
1411 | this->read_buf = doc2001plus_readbuf; | |
d24fe0c3 | 1412 | doc->late_init = inftl_scan_bbt; |
7abd3ef9 | 1413 | this->cmd_ctrl = NULL; |
1da177e4 LT |
1414 | this->select_chip = doc2001plus_select_chip; |
1415 | this->cmdfunc = doc2001plus_command; | |
0cddd6c2 | 1416 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1417 | |
1418 | doc->chips_per_floor = 1; | |
1419 | mtd->name = "DiskOnChip Millennium Plus"; | |
1420 | ||
1421 | return 1; | |
1422 | } | |
1423 | ||
858119e1 | 1424 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1425 | { |
1426 | unsigned char ChipID; | |
1427 | struct mtd_info *mtd; | |
1428 | struct nand_chip *nand; | |
1429 | struct doc_priv *doc; | |
1430 | void __iomem *virtadr; | |
1431 | unsigned char save_control; | |
1432 | unsigned char tmp, tmpb, tmpc; | |
1433 | int reg, len, numchips; | |
1434 | int ret = 0; | |
1435 | ||
86e4bbc7 | 1436 | if (!request_mem_region(physadr, DOC_IOREMAP_LEN, "DiskOnChip")) |
4f0614a0 | 1437 | return -EBUSY; |
1da177e4 LT |
1438 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); |
1439 | if (!virtadr) { | |
1440 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
4f0614a0 AS |
1441 | ret = -EIO; |
1442 | goto error_ioremap; | |
1da177e4 LT |
1443 | } |
1444 | ||
1445 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1446 | * bootup procedure will put the device into reset mode, and | |
1447 | * it's not possible to talk to it without actually writing | |
1448 | * to the DOCControl register. So we store the current contents | |
1449 | * of the DOCControl register's location, in case we later decide | |
1450 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1451 | * found it. |
1da177e4 LT |
1452 | */ |
1453 | save_control = ReadDOC(virtadr, DOCControl); | |
1454 | ||
1455 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1456 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1457 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1458 | |
1459 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1460 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1461 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1462 | |
1463 | ChipID = ReadDOC(virtadr, ChipID); | |
1464 | ||
e0c7d767 | 1465 | switch (ChipID) { |
1da177e4 LT |
1466 | case DOC_ChipID_Doc2k: |
1467 | reg = DoC_2k_ECCStatus; | |
1468 | break; | |
1469 | case DOC_ChipID_DocMil: | |
1470 | reg = DoC_ECCConf; | |
1471 | break; | |
1472 | case DOC_ChipID_DocMilPlus16: | |
1473 | case DOC_ChipID_DocMilPlus32: | |
1474 | case 0: | |
1475 | /* Possible Millennium Plus, need to do more checks */ | |
1476 | /* Possibly release from power down mode */ | |
1477 | for (tmp = 0; (tmp < 4); tmp++) | |
1478 | ReadDOC(virtadr, Mplus_Power); | |
1479 | ||
1480 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1481 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1482 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1483 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1484 | ||
1485 | mdelay(1); | |
1486 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1487 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1488 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1489 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1490 | mdelay(1); | |
1491 | ||
1492 | ChipID = ReadDOC(virtadr, ChipID); | |
1493 | ||
1494 | switch (ChipID) { | |
1495 | case DOC_ChipID_DocMilPlus16: | |
1496 | reg = DoC_Mplus_Toggle; | |
1497 | break; | |
1498 | case DOC_ChipID_DocMilPlus32: | |
1499 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1500 | default: | |
1501 | ret = -ENODEV; | |
1502 | goto notfound; | |
1503 | } | |
1504 | break; | |
1505 | ||
1506 | default: | |
1507 | ret = -ENODEV; | |
1508 | goto notfound; | |
1509 | } | |
1510 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1511 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1512 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1513 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1514 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1515 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1516 | ret = -ENODEV; | |
1517 | goto notfound; | |
1518 | } | |
1519 | ||
1520 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1521 | unsigned char oldval; | |
1522 | unsigned char newval; | |
4bd4ebcc | 1523 | nand = mtd_to_nand(mtd); |
d699ed25 | 1524 | doc = nand_get_controller_data(nand); |
1da177e4 LT |
1525 | /* Use the alias resolution register to determine if this is |
1526 | in fact the same DOC aliased to a new address. If writes | |
1527 | to one chip's alias resolution register change the value on | |
1528 | the other chip, they're the same chip. */ | |
1529 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1530 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1531 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1532 | } else { | |
1533 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1534 | newval = ReadDOC(virtadr, AliasResolution); | |
1535 | } | |
1536 | if (oldval != newval) | |
1537 | continue; | |
1538 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1539 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1540 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1541 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1542 | } else { |
1543 | WriteDOC(~newval, virtadr, AliasResolution); | |
1544 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1545 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1546 | } |
1547 | newval = ~newval; | |
1548 | if (oldval == newval) { | |
1549 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1550 | goto notfound; | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1555 | ||
b0c423c7 BB |
1556 | len = sizeof(struct nand_chip) + sizeof(struct doc_priv) + |
1557 | (2 * sizeof(struct nand_bbt_descr)); | |
1558 | nand = kzalloc(len, GFP_KERNEL); | |
1559 | if (!nand) { | |
1da177e4 LT |
1560 | ret = -ENOMEM; |
1561 | goto fail; | |
1562 | } | |
1da177e4 | 1563 | |
b0c423c7 | 1564 | mtd = nand_to_mtd(nand); |
1da177e4 LT |
1565 | doc = (struct doc_priv *) (nand + 1); |
1566 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1567 | nand->bbt_md = nand->bbt_td + 1; | |
1568 | ||
1da177e4 | 1569 | mtd->owner = THIS_MODULE; |
68c1b754 | 1570 | mtd_set_ooblayout(mtd, &doc200x_ooblayout_ops); |
1da177e4 | 1571 | |
d699ed25 | 1572 | nand_set_controller_data(nand, doc); |
1da177e4 | 1573 | nand->select_chip = doc200x_select_chip; |
7abd3ef9 | 1574 | nand->cmd_ctrl = doc200x_hwcontrol; |
1da177e4 LT |
1575 | nand->dev_ready = doc200x_dev_ready; |
1576 | nand->waitfunc = doc200x_wait; | |
1577 | nand->block_bad = doc200x_block_bad; | |
6dfc6d25 TG |
1578 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1579 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1580 | nand->ecc.correct = doc200x_correct_data; | |
1da177e4 | 1581 | |
6dfc6d25 TG |
1582 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; |
1583 | nand->ecc.size = 512; | |
1584 | nand->ecc.bytes = 6; | |
6a918bad | 1585 | nand->ecc.strength = 2; |
cc01e607 | 1586 | nand->ecc.options = NAND_ECC_GENERIC_ERASED_CHECK; |
bb9ebd4e | 1587 | nand->bbt_options = NAND_BBT_USE_FLASH; |
d24fe0c3 BN |
1588 | /* Skip the automatic BBT scan so we can run it manually */ |
1589 | nand->options |= NAND_SKIP_BBTSCAN; | |
1da177e4 LT |
1590 | |
1591 | doc->physadr = physadr; | |
1592 | doc->virtadr = virtadr; | |
1593 | doc->ChipID = ChipID; | |
1594 | doc->curfloor = -1; | |
1595 | doc->curchip = -1; | |
1596 | doc->mh0_page = -1; | |
1597 | doc->mh1_page = -1; | |
1598 | doc->nextdoc = doclist; | |
1599 | ||
1600 | if (ChipID == DOC_ChipID_Doc2k) | |
1601 | numchips = doc2000_init(mtd); | |
1602 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1603 | numchips = doc2001plus_init(mtd); | |
1604 | else | |
1605 | numchips = doc2001_init(mtd); | |
1606 | ||
d24fe0c3 | 1607 | if ((ret = nand_scan(mtd, numchips)) || (ret = doc->late_init(mtd))) { |
1da177e4 LT |
1608 | /* DBB note: i believe nand_release is necessary here, as |
1609 | buffers may have been allocated in nand_base. Check with | |
1610 | Thomas. FIX ME! */ | |
0f47e952 JI |
1611 | /* nand_release will call mtd_device_unregister, but we |
1612 | haven't yet added it. This is handled without incident by | |
1613 | mtd_device_unregister, as far as I can tell. */ | |
1da177e4 | 1614 | nand_release(mtd); |
b0c423c7 | 1615 | kfree(nand); |
1da177e4 LT |
1616 | goto fail; |
1617 | } | |
1618 | ||
1619 | /* Success! */ | |
1620 | doclist = mtd; | |
1621 | return 0; | |
1622 | ||
e0c7d767 | 1623 | notfound: |
1da177e4 LT |
1624 | /* Put back the contents of the DOCControl register, in case it's not |
1625 | actually a DiskOnChip. */ | |
1626 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1627 | fail: |
1da177e4 | 1628 | iounmap(virtadr); |
4f0614a0 AS |
1629 | |
1630 | error_ioremap: | |
1631 | release_mem_region(physadr, DOC_IOREMAP_LEN); | |
1632 | ||
1da177e4 LT |
1633 | return ret; |
1634 | } | |
1635 | ||
1636 | static void release_nanddoc(void) | |
1637 | { | |
e0c7d767 | 1638 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1639 | struct nand_chip *nand; |
1640 | struct doc_priv *doc; | |
1641 | ||
1642 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
4bd4ebcc | 1643 | nand = mtd_to_nand(mtd); |
d699ed25 | 1644 | doc = nand_get_controller_data(nand); |
1da177e4 LT |
1645 | |
1646 | nextmtd = doc->nextdoc; | |
1647 | nand_release(mtd); | |
1648 | iounmap(doc->virtadr); | |
4f0614a0 | 1649 | release_mem_region(doc->physadr, DOC_IOREMAP_LEN); |
b0c423c7 | 1650 | kfree(nand); |
1da177e4 LT |
1651 | } |
1652 | } | |
1653 | ||
1654 | static int __init init_nanddoc(void) | |
1655 | { | |
1656 | int i, ret = 0; | |
1657 | ||
1658 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1659 | * This way we have it handy, if an error happens |
1da177e4 LT |
1660 | * |
1661 | * Symbolsize is 10 (bits) | |
1662 | * Primitve polynomial is x^10+x^3+1 | |
1663 | * first consecutive root is 510 | |
1664 | * primitve element to generate roots = 1 | |
1665 | * generator polinomial degree = 4 | |
1666 | */ | |
1667 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1668 | if (!rs_decoder) { |
1669 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1670 | return -ENOMEM; |
1671 | } | |
1672 | ||
1673 | if (doc_config_location) { | |
1674 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1675 | ret = doc_probe(doc_config_location); | |
1676 | if (ret < 0) | |
1677 | goto outerr; | |
1678 | } else { | |
e0c7d767 | 1679 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1680 | doc_probe(doc_locations[i]); |
1681 | } | |
1682 | } | |
1683 | /* No banner message any more. Print a message if no DiskOnChip | |
1684 | found, so the user knows we at least tried. */ | |
1685 | if (!doclist) { | |
1686 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1687 | ret = -ENODEV; | |
1688 | goto outerr; | |
1689 | } | |
1690 | return 0; | |
e0c7d767 | 1691 | outerr: |
1da177e4 LT |
1692 | free_rs(rs_decoder); |
1693 | return ret; | |
1694 | } | |
1695 | ||
1696 | static void __exit cleanup_nanddoc(void) | |
1697 | { | |
1698 | /* Cleanup the nand/DoC resources */ | |
1699 | release_nanddoc(); | |
1700 | ||
1701 | /* Free the reed solomon resources */ | |
1702 | if (rs_decoder) { | |
1703 | free_rs(rs_decoder); | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | module_init(init_nanddoc); | |
1708 | module_exit(cleanup_nanddoc); | |
1709 | ||
1710 | MODULE_LICENSE("GPL"); | |
1711 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
2a7af8ca | 1712 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver"); |