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, | |
59 | #elif defined(CONFIG_MOMENCO_OCELOT) | |
60 | 0x2f000000, | |
e0c7d767 | 61 | 0xff000000, |
1da177e4 | 62 | #elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C) |
e0c7d767 DW |
63 | 0xff000000, |
64 | #else | |
1da177e4 LT |
65 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
66 | #endif | |
67 | 0xffffffff }; | |
68 | ||
69 | static struct mtd_info *doclist = NULL; | |
70 | ||
71 | struct doc_priv { | |
72 | void __iomem *virtadr; | |
73 | unsigned long physadr; | |
74 | u_char ChipID; | |
75 | u_char CDSNControl; | |
e0c7d767 | 76 | int chips_per_floor; /* The number of chips detected on each floor */ |
1da177e4 LT |
77 | int curfloor; |
78 | int curchip; | |
79 | int mh0_page; | |
80 | int mh1_page; | |
81 | struct mtd_info *nextdoc; | |
82 | }; | |
83 | ||
1da177e4 LT |
84 | /* This is the syndrome computed by the HW ecc generator upon reading an empty |
85 | page, one with all 0xff for data and stored ecc code. */ | |
86 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
e0c7d767 | 87 | |
1da177e4 LT |
88 | /* This is the ecc value computed by the HW ecc generator upon writing an empty |
89 | page, one with all 0xff for data. */ | |
90 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
91 | ||
92 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
93 | ||
94 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
95 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
96 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
97 | ||
7abd3ef9 TG |
98 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
99 | unsigned int bitmask); | |
1da177e4 LT |
100 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
101 | ||
e0c7d767 | 102 | static int debug = 0; |
1da177e4 LT |
103 | module_param(debug, int, 0); |
104 | ||
e0c7d767 | 105 | static int try_dword = 1; |
1da177e4 LT |
106 | module_param(try_dword, int, 0); |
107 | ||
e0c7d767 | 108 | static int no_ecc_failures = 0; |
1da177e4 LT |
109 | module_param(no_ecc_failures, int, 0); |
110 | ||
e0c7d767 | 111 | static int no_autopart = 0; |
1da177e4 | 112 | module_param(no_autopart, int, 0); |
1a78ff6b | 113 | |
e0c7d767 | 114 | static int show_firmware_partition = 0; |
1a78ff6b | 115 | module_param(show_firmware_partition, int, 0); |
1da177e4 LT |
116 | |
117 | #ifdef MTD_NAND_DISKONCHIP_BBTWRITE | |
e0c7d767 | 118 | static int inftl_bbt_write = 1; |
1da177e4 | 119 | #else |
e0c7d767 | 120 | static int inftl_bbt_write = 0; |
1da177e4 LT |
121 | #endif |
122 | module_param(inftl_bbt_write, int, 0); | |
123 | ||
651078ba | 124 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
125 | module_param(doc_config_location, ulong, 0); |
126 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
127 | ||
1da177e4 LT |
128 | /* Sector size for HW ECC */ |
129 | #define SECTOR_SIZE 512 | |
130 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
131 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
132 | /* Number of roots */ | |
133 | #define NROOTS 4 | |
134 | /* First consective root */ | |
135 | #define FCR 510 | |
136 | /* Number of symbols */ | |
137 | #define NN 1023 | |
138 | ||
139 | /* the Reed Solomon control structure */ | |
140 | static struct rs_control *rs_decoder; | |
141 | ||
61b03bd7 | 142 | /* |
1da177e4 LT |
143 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
144 | * which we must convert to a standard syndrom usable by the generic | |
145 | * Reed-Solomon library code. | |
146 | * | |
147 | * Fabrice Bellard figured this out in the old docecc code. I added | |
148 | * some comments, improved a minor bit and converted it to make use | |
149 | * of the generic Reed-Solomon libary. tglx | |
150 | */ | |
e0c7d767 | 151 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
152 | { |
153 | int i, j, nerr, errpos[8]; | |
154 | uint8_t parity; | |
155 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
156 | ||
157 | /* Convert the ecc bytes into words */ | |
158 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
159 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
160 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
161 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
162 | parity = ecc[1]; | |
163 | ||
164 | /* Initialize the syndrom buffer */ | |
165 | for (i = 0; i < NROOTS; i++) | |
166 | s[i] = ds[0]; | |
61b03bd7 TG |
167 | /* |
168 | * Evaluate | |
1da177e4 LT |
169 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
170 | * where x = alpha^(FCR + i) | |
171 | */ | |
e0c7d767 DW |
172 | for (j = 1; j < NROOTS; j++) { |
173 | if (ds[j] == 0) | |
1da177e4 LT |
174 | continue; |
175 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 176 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
177 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
178 | } | |
179 | ||
180 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
181 | for (i = 0; i < NROOTS; i++) { | |
182 | if (syn[i]) | |
e0c7d767 | 183 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
184 | } |
185 | /* Call the decoder library */ | |
186 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
187 | ||
188 | /* Incorrectable errors ? */ | |
189 | if (nerr < 0) | |
190 | return nerr; | |
191 | ||
61b03bd7 | 192 | /* |
1da177e4 LT |
193 | * Correct the errors. The bitpositions are a bit of magic, |
194 | * but they are given by the design of the de/encoder circuit | |
195 | * in the DoC ASIC's. | |
196 | */ | |
e0c7d767 | 197 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
198 | int index, bitpos, pos = 1015 - errpos[i]; |
199 | uint8_t val; | |
200 | if (pos >= NB_DATA && pos < 1019) | |
201 | continue; | |
202 | if (pos < NB_DATA) { | |
203 | /* extract bit position (MSB first) */ | |
204 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
205 | /* now correct the following 10 bits. At most two bytes | |
206 | can be modified since pos is even */ | |
207 | index = (pos >> 3) ^ 1; | |
208 | bitpos = pos & 7; | |
e0c7d767 | 209 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
210 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
211 | parity ^= val; | |
212 | if (index < SECTOR_SIZE) | |
213 | data[index] ^= val; | |
214 | } | |
215 | index = ((pos >> 3) + 1) ^ 1; | |
216 | bitpos = (bitpos + 10) & 7; | |
217 | if (bitpos == 0) | |
218 | bitpos = 8; | |
e0c7d767 DW |
219 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
220 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
221 | parity ^= val; |
222 | if (index < SECTOR_SIZE) | |
223 | data[index] ^= val; | |
224 | } | |
225 | } | |
226 | } | |
227 | /* If the parity is wrong, no rescue possible */ | |
228 | return parity ? -1 : nerr; | |
229 | } | |
230 | ||
231 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
232 | { | |
233 | volatile char dummy; | |
234 | int i; | |
61b03bd7 | 235 | |
1da177e4 LT |
236 | for (i = 0; i < cycles; i++) { |
237 | if (DoC_is_Millennium(doc)) | |
238 | dummy = ReadDOC(doc->virtadr, NOP); | |
239 | else if (DoC_is_MillenniumPlus(doc)) | |
240 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
241 | else | |
242 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
243 | } | |
61b03bd7 | 244 | |
1da177e4 LT |
245 | } |
246 | ||
247 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
248 | ||
249 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
250 | static int _DoC_WaitReady(struct doc_priv *doc) | |
251 | { | |
e0c7d767 | 252 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
253 | unsigned long timeo = jiffies + (HZ * 10); |
254 | ||
e0c7d767 DW |
255 | if (debug) |
256 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
257 | /* Out-of-line routine to wait for chip response */ |
258 | if (DoC_is_MillenniumPlus(doc)) { | |
259 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
260 | if (time_after(jiffies, timeo)) { | |
261 | printk("_DoC_WaitReady timed out.\n"); | |
262 | return -EIO; | |
263 | } | |
264 | udelay(1); | |
265 | cond_resched(); | |
266 | } | |
267 | } else { | |
268 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
269 | if (time_after(jiffies, timeo)) { | |
270 | printk("_DoC_WaitReady timed out.\n"); | |
271 | return -EIO; | |
272 | } | |
273 | udelay(1); | |
274 | cond_resched(); | |
275 | } | |
276 | } | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
282 | { | |
e0c7d767 | 283 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
284 | int ret = 0; |
285 | ||
286 | if (DoC_is_MillenniumPlus(doc)) { | |
287 | DoC_Delay(doc, 4); | |
288 | ||
289 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
290 | /* Call the out-of-line routine to wait */ | |
291 | ret = _DoC_WaitReady(doc); | |
292 | } else { | |
293 | DoC_Delay(doc, 4); | |
294 | ||
295 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
296 | /* Call the out-of-line routine to wait */ | |
297 | ret = _DoC_WaitReady(doc); | |
298 | DoC_Delay(doc, 2); | |
299 | } | |
300 | ||
e0c7d767 DW |
301 | if (debug) |
302 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
303 | return ret; |
304 | } | |
305 | ||
306 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
307 | { | |
308 | struct nand_chip *this = mtd->priv; | |
309 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 310 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 311 | |
e0c7d767 DW |
312 | if (debug) |
313 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
314 | WriteDOC(datum, docptr, CDSNSlowIO); |
315 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
316 | } | |
317 | ||
318 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
319 | { | |
320 | struct nand_chip *this = mtd->priv; | |
321 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 322 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
323 | u_char ret; |
324 | ||
325 | ReadDOC(docptr, CDSNSlowIO); | |
326 | DoC_Delay(doc, 2); | |
327 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
328 | if (debug) |
329 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
330 | return ret; |
331 | } | |
332 | ||
e0c7d767 | 333 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
334 | { |
335 | struct nand_chip *this = mtd->priv; | |
336 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 337 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 338 | int i; |
e0c7d767 DW |
339 | if (debug) |
340 | printk("writebuf of %d bytes: ", len); | |
341 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
342 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
343 | if (debug && i < 16) | |
344 | printk("%02x ", buf[i]); | |
345 | } | |
e0c7d767 DW |
346 | if (debug) |
347 | printk("\n"); | |
1da177e4 LT |
348 | } |
349 | ||
e0c7d767 | 350 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
351 | { |
352 | struct nand_chip *this = mtd->priv; | |
353 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
354 | void __iomem *docptr = doc->virtadr; |
355 | int i; | |
1da177e4 | 356 | |
e0c7d767 DW |
357 | if (debug) |
358 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 359 | |
e0c7d767 | 360 | for (i = 0; i < len; i++) { |
1da177e4 LT |
361 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
362 | } | |
363 | } | |
364 | ||
e0c7d767 | 365 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
366 | { |
367 | struct nand_chip *this = mtd->priv; | |
368 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
369 | void __iomem *docptr = doc->virtadr; |
370 | int i; | |
1da177e4 | 371 | |
e0c7d767 DW |
372 | if (debug) |
373 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 374 | |
e0c7d767 DW |
375 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
376 | for (i = 0; i < len; i++) { | |
377 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 LT |
378 | } |
379 | } else { | |
e0c7d767 DW |
380 | for (i = 0; i < len; i += 4) { |
381 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
382 | } |
383 | } | |
384 | } | |
385 | ||
e0c7d767 | 386 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
387 | { |
388 | struct nand_chip *this = mtd->priv; | |
389 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 390 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
391 | int i; |
392 | ||
e0c7d767 | 393 | for (i = 0; i < len; i++) |
1da177e4 LT |
394 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
395 | return -EFAULT; | |
396 | return 0; | |
397 | } | |
398 | ||
399 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
400 | { | |
401 | struct nand_chip *this = mtd->priv; | |
402 | struct doc_priv *doc = this->priv; | |
403 | uint16_t ret; | |
404 | ||
405 | doc200x_select_chip(mtd, nr); | |
7abd3ef9 TG |
406 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
407 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
408 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
409 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 410 | |
dfd61294 | 411 | /* We cant' use dev_ready here, but at least we wait for the |
61b03bd7 | 412 | * command to complete |
dfd61294 TG |
413 | */ |
414 | udelay(50); | |
61b03bd7 | 415 | |
1da177e4 LT |
416 | ret = this->read_byte(mtd) << 8; |
417 | ret |= this->read_byte(mtd); | |
418 | ||
419 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
420 | /* First chip probe. See if we get same results by 32-bit access */ | |
421 | union { | |
422 | uint32_t dword; | |
423 | uint8_t byte[4]; | |
424 | } ident; | |
425 | void __iomem *docptr = doc->virtadr; | |
426 | ||
7abd3ef9 TG |
427 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
428 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
429 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
430 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
431 | NAND_NCE | NAND_CTRL_CHANGE); | |
1da177e4 | 432 | |
dfd61294 TG |
433 | udelay(50); |
434 | ||
1da177e4 LT |
435 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
436 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
437 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
438 | this->read_buf = &doc2000_readbuf_dword; | |
439 | } | |
440 | } | |
61b03bd7 | 441 | |
1da177e4 LT |
442 | return ret; |
443 | } | |
444 | ||
445 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
446 | { | |
447 | struct nand_chip *this = mtd->priv; | |
448 | struct doc_priv *doc = this->priv; | |
449 | uint16_t mfrid; | |
450 | int i; | |
451 | ||
452 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
453 | doc->chips_per_floor = 4; | |
454 | ||
455 | /* Find out what the first chip is */ | |
456 | mfrid = doc200x_ident_chip(mtd, 0); | |
457 | ||
458 | /* Find how many chips in each floor. */ | |
459 | for (i = 1; i < 4; i++) { | |
460 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
461 | break; | |
462 | } | |
463 | doc->chips_per_floor = i; | |
464 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
465 | } | |
466 | ||
467 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
468 | { | |
469 | struct doc_priv *doc = this->priv; | |
470 | ||
471 | int status; | |
61b03bd7 | 472 | |
1da177e4 LT |
473 | DoC_WaitReady(doc); |
474 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
475 | DoC_WaitReady(doc); | |
476 | status = (int)this->read_byte(mtd); | |
477 | ||
478 | return status; | |
479 | } | |
480 | ||
481 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
482 | { | |
483 | struct nand_chip *this = mtd->priv; | |
484 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 485 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
486 | |
487 | WriteDOC(datum, docptr, CDSNSlowIO); | |
488 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
489 | WriteDOC(datum, docptr, WritePipeTerm); | |
490 | } | |
491 | ||
492 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
493 | { | |
494 | struct nand_chip *this = mtd->priv; | |
495 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 496 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
497 | |
498 | //ReadDOC(docptr, CDSNSlowIO); | |
499 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
500 | DoC_Delay(doc, 2); | |
501 | ReadDOC(docptr, ReadPipeInit); | |
502 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
503 | return ReadDOC(docptr, LastDataRead); | |
504 | } | |
505 | ||
e0c7d767 | 506 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
507 | { |
508 | struct nand_chip *this = mtd->priv; | |
509 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 510 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
511 | int i; |
512 | ||
e0c7d767 | 513 | for (i = 0; i < len; i++) |
1da177e4 LT |
514 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
515 | /* Terminate write pipeline */ | |
516 | WriteDOC(0x00, docptr, WritePipeTerm); | |
517 | } | |
518 | ||
e0c7d767 | 519 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
520 | { |
521 | struct nand_chip *this = mtd->priv; | |
522 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 523 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
524 | int i; |
525 | ||
526 | /* Start read pipeline */ | |
527 | ReadDOC(docptr, ReadPipeInit); | |
528 | ||
e0c7d767 | 529 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
530 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
531 | ||
532 | /* Terminate read pipeline */ | |
533 | buf[i] = ReadDOC(docptr, LastDataRead); | |
534 | } | |
535 | ||
e0c7d767 | 536 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
537 | { |
538 | struct nand_chip *this = mtd->priv; | |
539 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 540 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
541 | int i; |
542 | ||
543 | /* Start read pipeline */ | |
544 | ReadDOC(docptr, ReadPipeInit); | |
545 | ||
e0c7d767 | 546 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
547 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
548 | ReadDOC(docptr, LastDataRead); | |
549 | return i; | |
550 | } | |
551 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
552 | return i; | |
553 | return 0; | |
554 | } | |
555 | ||
556 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
557 | { | |
558 | struct nand_chip *this = mtd->priv; | |
559 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 560 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
561 | u_char ret; |
562 | ||
e0c7d767 DW |
563 | ReadDOC(docptr, Mplus_ReadPipeInit); |
564 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
565 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
566 | if (debug) | |
567 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
568 | return ret; |
569 | } | |
570 | ||
e0c7d767 | 571 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
572 | { |
573 | struct nand_chip *this = mtd->priv; | |
574 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 575 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
576 | int i; |
577 | ||
e0c7d767 DW |
578 | if (debug) |
579 | printk("writebuf of %d bytes: ", len); | |
580 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
581 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
582 | if (debug && i < 16) | |
583 | printk("%02x ", buf[i]); | |
584 | } | |
e0c7d767 DW |
585 | if (debug) |
586 | printk("\n"); | |
1da177e4 LT |
587 | } |
588 | ||
e0c7d767 | 589 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
590 | { |
591 | struct nand_chip *this = mtd->priv; | |
592 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 593 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
594 | int i; |
595 | ||
e0c7d767 DW |
596 | if (debug) |
597 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
598 | |
599 | /* Start read pipeline */ | |
600 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
601 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
602 | ||
e0c7d767 | 603 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
604 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
605 | if (debug && i < 16) | |
606 | printk("%02x ", buf[i]); | |
607 | } | |
608 | ||
609 | /* Terminate read pipeline */ | |
e0c7d767 | 610 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 611 | if (debug && i < 16) |
e0c7d767 DW |
612 | printk("%02x ", buf[len - 2]); |
613 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 614 | if (debug && i < 16) |
e0c7d767 DW |
615 | printk("%02x ", buf[len - 1]); |
616 | if (debug) | |
617 | printk("\n"); | |
1da177e4 LT |
618 | } |
619 | ||
e0c7d767 | 620 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
621 | { |
622 | struct nand_chip *this = mtd->priv; | |
623 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 624 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
625 | int i; |
626 | ||
e0c7d767 DW |
627 | if (debug) |
628 | printk("verifybuf of %d bytes: ", len); | |
1da177e4 LT |
629 | |
630 | /* Start read pipeline */ | |
631 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
632 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
633 | ||
e0c7d767 | 634 | for (i = 0; i < len - 2; i++) |
1da177e4 LT |
635 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
636 | ReadDOC(docptr, Mplus_LastDataRead); | |
637 | ReadDOC(docptr, Mplus_LastDataRead); | |
638 | return i; | |
639 | } | |
e0c7d767 DW |
640 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
641 | return len - 2; | |
642 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
643 | return len - 1; | |
1da177e4 LT |
644 | return 0; |
645 | } | |
646 | ||
647 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
648 | { | |
649 | struct nand_chip *this = mtd->priv; | |
650 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 651 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
652 | int floor = 0; |
653 | ||
e0c7d767 DW |
654 | if (debug) |
655 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
656 | |
657 | if (chip == -1) { | |
658 | /* Disable flash internally */ | |
659 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
660 | return; | |
661 | } | |
662 | ||
663 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 664 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
665 | |
666 | /* Assert ChipEnable and deassert WriteProtect */ | |
667 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
668 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
669 | ||
670 | doc->curchip = chip; | |
671 | doc->curfloor = floor; | |
672 | } | |
673 | ||
674 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
675 | { | |
676 | struct nand_chip *this = mtd->priv; | |
677 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 678 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
679 | int floor = 0; |
680 | ||
e0c7d767 DW |
681 | if (debug) |
682 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
683 | |
684 | if (chip == -1) | |
685 | return; | |
686 | ||
687 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 688 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
689 | |
690 | /* 11.4.4 -- deassert CE before changing chip */ | |
7abd3ef9 | 691 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
692 | |
693 | WriteDOC(floor, docptr, FloorSelect); | |
694 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
695 | ||
7abd3ef9 | 696 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
697 | |
698 | doc->curchip = chip; | |
699 | doc->curfloor = floor; | |
700 | } | |
701 | ||
7abd3ef9 TG |
702 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
703 | ||
704 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
705 | unsigned int ctrl) | |
1da177e4 LT |
706 | { |
707 | struct nand_chip *this = mtd->priv; | |
708 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 709 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 710 | |
7abd3ef9 TG |
711 | if (ctrl & NAND_CTRL_CHANGE) { |
712 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
713 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
714 | if (debug) | |
715 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
716 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
717 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
718 | DoC_Delay(doc, 4); | |
1da177e4 | 719 | } |
cad74f2c TG |
720 | if (cmd != NAND_CMD_NONE) { |
721 | if (DoC_is_2000(doc)) | |
722 | doc2000_write_byte(mtd, cmd); | |
723 | else | |
724 | doc2001_write_byte(mtd, cmd); | |
725 | } | |
1da177e4 LT |
726 | } |
727 | ||
e0c7d767 | 728 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
729 | { |
730 | struct nand_chip *this = mtd->priv; | |
731 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 732 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
733 | |
734 | /* | |
735 | * Must terminate write pipeline before sending any commands | |
736 | * to the device. | |
737 | */ | |
738 | if (command == NAND_CMD_PAGEPROG) { | |
739 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
740 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
741 | } | |
742 | ||
743 | /* | |
744 | * Write out the command to the device. | |
745 | */ | |
746 | if (command == NAND_CMD_SEQIN) { | |
747 | int readcmd; | |
748 | ||
28318776 | 749 | if (column >= mtd->writesize) { |
1da177e4 | 750 | /* OOB area */ |
28318776 | 751 | column -= mtd->writesize; |
1da177e4 LT |
752 | readcmd = NAND_CMD_READOOB; |
753 | } else if (column < 256) { | |
754 | /* First 256 bytes --> READ0 */ | |
755 | readcmd = NAND_CMD_READ0; | |
756 | } else { | |
757 | column -= 256; | |
758 | readcmd = NAND_CMD_READ1; | |
759 | } | |
760 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
761 | } | |
762 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
763 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
764 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
765 | ||
766 | if (column != -1 || page_addr != -1) { | |
767 | /* Serially input address */ | |
768 | if (column != -1) { | |
769 | /* Adjust columns for 16 bit buswidth */ | |
770 | if (this->options & NAND_BUSWIDTH_16) | |
771 | column >>= 1; | |
772 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
773 | } | |
774 | if (page_addr != -1) { | |
e0c7d767 DW |
775 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
776 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
777 | /* One more address cycle for higher density devices */ |
778 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 779 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
780 | printk("high density\n"); |
781 | } | |
782 | } | |
783 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
784 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
785 | /* deassert ALE */ | |
e0c7d767 DW |
786 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
787 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
788 | WriteDOC(0, docptr, Mplus_FlashControl); |
789 | } | |
790 | ||
61b03bd7 | 791 | /* |
1da177e4 LT |
792 | * program and erase have their own busy handlers |
793 | * status and sequential in needs no delay | |
e0c7d767 | 794 | */ |
1da177e4 LT |
795 | switch (command) { |
796 | ||
797 | case NAND_CMD_PAGEPROG: | |
798 | case NAND_CMD_ERASE1: | |
799 | case NAND_CMD_ERASE2: | |
800 | case NAND_CMD_SEQIN: | |
801 | case NAND_CMD_STATUS: | |
802 | return; | |
803 | ||
804 | case NAND_CMD_RESET: | |
805 | if (this->dev_ready) | |
806 | break; | |
807 | udelay(this->chip_delay); | |
808 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
809 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
810 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 811 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
812 | return; |
813 | ||
e0c7d767 | 814 | /* This applies to read commands */ |
1da177e4 | 815 | default: |
61b03bd7 | 816 | /* |
1da177e4 LT |
817 | * If we don't have access to the busy pin, we apply the given |
818 | * command delay | |
e0c7d767 | 819 | */ |
1da177e4 | 820 | if (!this->dev_ready) { |
e0c7d767 | 821 | udelay(this->chip_delay); |
1da177e4 LT |
822 | return; |
823 | } | |
824 | } | |
825 | ||
826 | /* Apply this short delay always to ensure that we do wait tWB in | |
827 | * any case on any machine. */ | |
e0c7d767 | 828 | ndelay(100); |
1da177e4 | 829 | /* wait until command is processed */ |
e0c7d767 | 830 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
831 | } |
832 | ||
833 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
834 | { | |
835 | struct nand_chip *this = mtd->priv; | |
836 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 837 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
838 | |
839 | if (DoC_is_MillenniumPlus(doc)) { | |
840 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
841 | DoC_Delay(doc, 4); | |
842 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 843 | if (debug) |
1da177e4 LT |
844 | printk("not ready\n"); |
845 | return 0; | |
846 | } | |
e0c7d767 DW |
847 | if (debug) |
848 | printk("was ready\n"); | |
1da177e4 LT |
849 | return 1; |
850 | } else { | |
851 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
852 | DoC_Delay(doc, 4); | |
853 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 854 | if (debug) |
1da177e4 LT |
855 | printk("not ready\n"); |
856 | return 0; | |
857 | } | |
858 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
859 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
860 | if (debug) |
861 | printk("was ready\n"); | |
1da177e4 LT |
862 | return 1; |
863 | } | |
864 | } | |
865 | ||
866 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
867 | { | |
868 | /* This is our last resort if we couldn't find or create a BBT. Just | |
869 | pretend all blocks are good. */ | |
870 | return 0; | |
871 | } | |
872 | ||
873 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
874 | { | |
875 | struct nand_chip *this = mtd->priv; | |
876 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 877 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
878 | |
879 | /* Prime the ECC engine */ | |
e0c7d767 | 880 | switch (mode) { |
1da177e4 LT |
881 | case NAND_ECC_READ: |
882 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
883 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
884 | break; | |
885 | case NAND_ECC_WRITE: | |
886 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
887 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
888 | break; | |
889 | } | |
890 | } | |
891 | ||
892 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
893 | { | |
894 | struct nand_chip *this = mtd->priv; | |
895 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 896 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
897 | |
898 | /* Prime the ECC engine */ | |
e0c7d767 | 899 | switch (mode) { |
1da177e4 LT |
900 | case NAND_ECC_READ: |
901 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
902 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
903 | break; | |
904 | case NAND_ECC_WRITE: | |
905 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
906 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
907 | break; | |
908 | } | |
909 | } | |
910 | ||
911 | /* This code is only called on write */ | |
e0c7d767 | 912 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 LT |
913 | { |
914 | struct nand_chip *this = mtd->priv; | |
915 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 916 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
917 | int i; |
918 | int emptymatch = 1; | |
919 | ||
920 | /* flush the pipeline */ | |
921 | if (DoC_is_2000(doc)) { | |
922 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
923 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
924 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
925 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
926 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
927 | } else if (DoC_is_MillenniumPlus(doc)) { | |
928 | WriteDOC(0, docptr, Mplus_NOP); | |
929 | WriteDOC(0, docptr, Mplus_NOP); | |
930 | WriteDOC(0, docptr, Mplus_NOP); | |
931 | } else { | |
932 | WriteDOC(0, docptr, NOP); | |
933 | WriteDOC(0, docptr, NOP); | |
934 | WriteDOC(0, docptr, NOP); | |
935 | } | |
936 | ||
937 | for (i = 0; i < 6; i++) { | |
938 | if (DoC_is_MillenniumPlus(doc)) | |
939 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 940 | else |
1da177e4 LT |
941 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
942 | if (ecc_code[i] != empty_write_ecc[i]) | |
943 | emptymatch = 0; | |
944 | } | |
945 | if (DoC_is_MillenniumPlus(doc)) | |
946 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
947 | else | |
948 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
949 | #if 0 | |
950 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
951 | if (emptymatch) { | |
952 | /* Note: this somewhat expensive test should not be triggered | |
953 | often. It could be optimized away by examining the data in | |
954 | the writebuf routine, and remembering the result. */ | |
955 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
956 | if (dat[i] == 0xff) |
957 | continue; | |
1da177e4 LT |
958 | emptymatch = 0; |
959 | break; | |
960 | } | |
961 | } | |
962 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
963 | Return all-0xff ecc value instead of the computed one, so | |
964 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
965 | if (emptymatch) |
966 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
967 | #endif |
968 | return 0; | |
969 | } | |
970 | ||
f5bbdacc TG |
971 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
972 | u_char *read_ecc, u_char *isnull) | |
1da177e4 LT |
973 | { |
974 | int i, ret = 0; | |
975 | struct nand_chip *this = mtd->priv; | |
976 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 977 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 978 | uint8_t calc_ecc[6]; |
1da177e4 LT |
979 | volatile u_char dummy; |
980 | int emptymatch = 1; | |
61b03bd7 | 981 | |
1da177e4 LT |
982 | /* flush the pipeline */ |
983 | if (DoC_is_2000(doc)) { | |
984 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
985 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
986 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
987 | } else if (DoC_is_MillenniumPlus(doc)) { | |
988 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
989 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
990 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
991 | } else { | |
992 | dummy = ReadDOC(docptr, ECCConf); | |
993 | dummy = ReadDOC(docptr, ECCConf); | |
994 | dummy = ReadDOC(docptr, ECCConf); | |
995 | } | |
61b03bd7 | 996 | |
1da177e4 LT |
997 | /* Error occured ? */ |
998 | if (dummy & 0x80) { | |
999 | for (i = 0; i < 6; i++) { | |
1000 | if (DoC_is_MillenniumPlus(doc)) | |
1001 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
1002 | else | |
1003 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
1004 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
1005 | emptymatch = 0; | |
1006 | } | |
1007 | /* If emptymatch=1, the read syndrome is consistent with an | |
1008 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1009 | if (emptymatch) { | |
1010 | for (i = 0; i < 6; i++) { | |
e0c7d767 DW |
1011 | if (read_ecc[i] == 0xff) |
1012 | continue; | |
1da177e4 LT |
1013 | emptymatch = 0; |
1014 | break; | |
1015 | } | |
1016 | } | |
1017 | /* If emptymatch still =1, check the data block. */ | |
1018 | if (emptymatch) { | |
e0c7d767 DW |
1019 | /* Note: this somewhat expensive test should not be triggered |
1020 | often. It could be optimized away by examining the data in | |
1021 | the readbuf routine, and remembering the result. */ | |
1da177e4 | 1022 | for (i = 0; i < 512; i++) { |
e0c7d767 DW |
1023 | if (dat[i] == 0xff) |
1024 | continue; | |
1da177e4 LT |
1025 | emptymatch = 0; |
1026 | break; | |
1027 | } | |
1028 | } | |
1029 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1030 | erased block, in which case the ECC will not come out right. | |
1031 | We'll suppress the error and tell the caller everything's | |
1032 | OK. Because it is. */ | |
e0c7d767 DW |
1033 | if (!emptymatch) |
1034 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
1035 | if (ret > 0) |
1036 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 1037 | } |
1da177e4 LT |
1038 | if (DoC_is_MillenniumPlus(doc)) |
1039 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1040 | else | |
1041 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1042 | if (no_ecc_failures && (ret == -1)) { | |
1043 | printk(KERN_ERR "suppressing ECC failure\n"); | |
1044 | ret = 0; | |
1045 | } | |
1046 | return ret; | |
1047 | } | |
61b03bd7 | 1048 | |
1da177e4 LT |
1049 | //u_char mydatabuf[528]; |
1050 | ||
abc37e67 DB |
1051 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
1052 | * attempt to retain compatibility. It used to read: | |
1053 | * .oobfree = { {8, 8} } | |
1054 | * Since that leaves two bytes unusable, it was changed. But the following | |
1055 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1056 | * .oobfree = { {6, 10} } | |
1057 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1058 | * safer. The only problem with it is that any code that parses oobfree must | |
1059 | * be able to handle out-of-order segments. | |
1060 | */ | |
5bd34c09 | 1061 | static struct nand_ecclayout doc200x_oobinfo = { |
e0c7d767 DW |
1062 | .eccbytes = 6, |
1063 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
1064 | .oobfree = {{8, 8}, {6, 2}} | |
1da177e4 | 1065 | }; |
61b03bd7 | 1066 | |
1da177e4 LT |
1067 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
1068 | On sucessful return, buf will contain a copy of the media header for | |
1069 | further processing. id is the string to scan for, and will presumably be | |
1070 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1071 | header. The page #s of the found media headers are placed in mh0_page and | |
1072 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1073 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 LT |
1074 | { |
1075 | struct nand_chip *this = mtd->priv; | |
1076 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1077 | unsigned offs; |
1da177e4 LT |
1078 | int ret; |
1079 | size_t retlen; | |
1080 | ||
1a78ff6b | 1081 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
28318776 JE |
1082 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1083 | if (retlen != mtd->writesize) | |
e0c7d767 | 1084 | continue; |
1da177e4 | 1085 | if (ret) { |
e0c7d767 | 1086 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1087 | } |
e0c7d767 DW |
1088 | if (memcmp(buf, id, 6)) |
1089 | continue; | |
1da177e4 LT |
1090 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1091 | if (doc->mh0_page == -1) { | |
1092 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1093 | if (!findmirror) |
1094 | return 1; | |
1da177e4 LT |
1095 | continue; |
1096 | } | |
1097 | doc->mh1_page = offs >> this->page_shift; | |
1098 | return 2; | |
1099 | } | |
1100 | if (doc->mh0_page == -1) { | |
1101 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1102 | return 0; | |
1103 | } | |
1104 | /* Only one mediaheader was found. We want buf to contain a | |
1105 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1106 | offs = doc->mh0_page << this->page_shift; | |
28318776 JE |
1107 | ret = mtd->read(mtd, offs, mtd->writesize, &retlen, buf); |
1108 | if (retlen != mtd->writesize) { | |
1da177e4 LT |
1109 | /* Insanity. Give up. */ |
1110 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1111 | return 0; | |
1112 | } | |
1113 | return 1; | |
1114 | } | |
1115 | ||
e0c7d767 | 1116 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1117 | { |
1118 | struct nand_chip *this = mtd->priv; | |
1119 | struct doc_priv *doc = this->priv; | |
1120 | int ret = 0; | |
1121 | u_char *buf; | |
1122 | struct NFTLMediaHeader *mh; | |
1123 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1124 | int numparts = 0; |
1da177e4 LT |
1125 | unsigned blocks, maxblocks; |
1126 | int offs, numheaders; | |
1127 | ||
28318776 | 1128 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1129 | if (!buf) { |
1130 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1131 | return 0; | |
1132 | } | |
e0c7d767 DW |
1133 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1134 | goto out; | |
1135 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1136 | |
f29a4b86 TG |
1137 | mh->NumEraseUnits = le16_to_cpu(mh->NumEraseUnits); |
1138 | mh->FirstPhysicalEUN = le16_to_cpu(mh->FirstPhysicalEUN); | |
1139 | mh->FormattedSize = le32_to_cpu(mh->FormattedSize); | |
1140 | ||
1da177e4 LT |
1141 | printk(KERN_INFO " DataOrgID = %s\n" |
1142 | " NumEraseUnits = %d\n" | |
1143 | " FirstPhysicalEUN = %d\n" | |
1144 | " FormattedSize = %d\n" | |
1145 | " UnitSizeFactor = %d\n", | |
1146 | mh->DataOrgID, mh->NumEraseUnits, | |
1147 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1148 | mh->UnitSizeFactor); | |
1da177e4 LT |
1149 | |
1150 | blocks = mtd->size >> this->phys_erase_shift; | |
1151 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1152 | ||
1153 | if (mh->UnitSizeFactor == 0x00) { | |
1154 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1155 | - There can be at most 32768 virtual blocks. | |
1156 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1157 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1158 | */ | |
1da177e4 LT |
1159 | mh->UnitSizeFactor = 0xff; |
1160 | while (blocks > maxblocks) { | |
1161 | blocks >>= 1; | |
1162 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1163 | mh->UnitSizeFactor--; | |
1164 | } | |
1165 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1166 | } | |
1167 | ||
1168 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1169 | layers; variables with have already been configured by nand_scan. | |
1170 | Unfortunately, we didn't know before this point what these values | |
1171 | should be. Thus, this code is somewhat dependant on the exact | |
1172 | implementation of the NAND layer. */ | |
1173 | if (mh->UnitSizeFactor != 0xff) { | |
1174 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1175 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1176 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1177 | blocks = mtd->size >> this->bbt_erase_shift; | |
1178 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1179 | } | |
1180 | ||
1181 | if (blocks > maxblocks) { | |
1182 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1183 | goto out; | |
1184 | } | |
1185 | ||
1186 | /* Skip past the media headers. */ | |
1187 | offs = max(doc->mh0_page, doc->mh1_page); | |
1188 | offs <<= this->page_shift; | |
1189 | offs += mtd->erasesize; | |
1190 | ||
1a78ff6b DB |
1191 | if (show_firmware_partition == 1) { |
1192 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1193 | parts[0].offset = 0; | |
1194 | parts[0].size = offs; | |
1195 | numparts = 1; | |
1196 | } | |
1197 | ||
1198 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1199 | parts[numparts].offset = offs; | |
1200 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1201 | ||
1202 | offs += parts[numparts].size; | |
1203 | numparts++; | |
1da177e4 | 1204 | |
1da177e4 | 1205 | if (offs < mtd->size) { |
1a78ff6b DB |
1206 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1207 | parts[numparts].offset = offs; | |
1208 | parts[numparts].size = mtd->size - offs; | |
1209 | numparts++; | |
1da177e4 | 1210 | } |
1a78ff6b DB |
1211 | |
1212 | ret = numparts; | |
e0c7d767 | 1213 | out: |
1da177e4 LT |
1214 | kfree(buf); |
1215 | return ret; | |
1216 | } | |
1217 | ||
1218 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1219 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1220 | { |
1221 | struct nand_chip *this = mtd->priv; | |
1222 | struct doc_priv *doc = this->priv; | |
1223 | int ret = 0; | |
1224 | u_char *buf; | |
1225 | struct INFTLMediaHeader *mh; | |
1226 | struct INFTLPartition *ip; | |
1227 | int numparts = 0; | |
1228 | int blocks; | |
1229 | int vshift, lastvunit = 0; | |
1230 | int i; | |
1231 | int end = mtd->size; | |
1232 | ||
1233 | if (inftl_bbt_write) | |
1234 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1235 | ||
28318776 | 1236 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1237 | if (!buf) { |
1238 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1239 | return 0; | |
1240 | } | |
1241 | ||
e0c7d767 DW |
1242 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1243 | goto out; | |
1da177e4 | 1244 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1245 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 LT |
1246 | |
1247 | mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks); | |
1248 | mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions); | |
1249 | mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions); | |
1250 | mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits); | |
1251 | mh->FormatFlags = le32_to_cpu(mh->FormatFlags); | |
1252 | mh->PercentUsed = le32_to_cpu(mh->PercentUsed); | |
61b03bd7 | 1253 | |
1da177e4 LT |
1254 | printk(KERN_INFO " bootRecordID = %s\n" |
1255 | " NoOfBootImageBlocks = %d\n" | |
1256 | " NoOfBinaryPartitions = %d\n" | |
1257 | " NoOfBDTLPartitions = %d\n" | |
1258 | " BlockMultiplerBits = %d\n" | |
1259 | " FormatFlgs = %d\n" | |
1260 | " OsakVersion = %d.%d.%d.%d\n" | |
1261 | " PercentUsed = %d\n", | |
1262 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1263 | mh->NoOfBinaryPartitions, | |
1264 | mh->NoOfBDTLPartitions, | |
1265 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1266 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1267 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1268 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1269 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1270 | mh->PercentUsed); | |
1da177e4 LT |
1271 | |
1272 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1273 | ||
1274 | blocks = mtd->size >> vshift; | |
1275 | if (blocks > 32768) { | |
1276 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1277 | goto out; | |
1278 | } | |
1279 | ||
1280 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1281 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1282 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1283 | goto out; | |
1284 | } | |
1285 | ||
1286 | /* Scan the partitions */ | |
1287 | for (i = 0; (i < 4); i++) { | |
1288 | ip = &(mh->Partitions[i]); | |
1289 | ip->virtualUnits = le32_to_cpu(ip->virtualUnits); | |
1290 | ip->firstUnit = le32_to_cpu(ip->firstUnit); | |
1291 | ip->lastUnit = le32_to_cpu(ip->lastUnit); | |
1292 | ip->flags = le32_to_cpu(ip->flags); | |
1293 | ip->spareUnits = le32_to_cpu(ip->spareUnits); | |
1294 | ip->Reserved0 = le32_to_cpu(ip->Reserved0); | |
1295 | ||
1da177e4 LT |
1296 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1297 | " virtualUnits = %d\n" | |
1298 | " firstUnit = %d\n" | |
1299 | " lastUnit = %d\n" | |
1300 | " flags = 0x%x\n" | |
1301 | " spareUnits = %d\n", | |
1302 | i, ip->virtualUnits, ip->firstUnit, | |
1303 | ip->lastUnit, ip->flags, | |
1304 | ip->spareUnits); | |
1da177e4 | 1305 | |
1a78ff6b DB |
1306 | if ((show_firmware_partition == 1) && |
1307 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1308 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1309 | parts[0].offset = 0; | |
1310 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1311 | numparts = 1; | |
1312 | } | |
1da177e4 LT |
1313 | |
1314 | if (ip->flags & INFTL_BINARY) | |
1315 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1316 | else | |
1317 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1318 | parts[numparts].offset = ip->firstUnit << vshift; | |
1319 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1320 | numparts++; | |
e0c7d767 DW |
1321 | if (ip->lastUnit > lastvunit) |
1322 | lastvunit = ip->lastUnit; | |
1323 | if (ip->flags & INFTL_LAST) | |
1324 | break; | |
1da177e4 LT |
1325 | } |
1326 | lastvunit++; | |
1327 | if ((lastvunit << vshift) < end) { | |
1328 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1329 | parts[numparts].offset = lastvunit << vshift; | |
1330 | parts[numparts].size = end - parts[numparts].offset; | |
1331 | numparts++; | |
1332 | } | |
1333 | ret = numparts; | |
e0c7d767 | 1334 | out: |
1da177e4 LT |
1335 | kfree(buf); |
1336 | return ret; | |
1337 | } | |
1338 | ||
1339 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1340 | { | |
1341 | int ret, numparts; | |
1342 | struct nand_chip *this = mtd->priv; | |
1343 | struct doc_priv *doc = this->priv; | |
1344 | struct mtd_partition parts[2]; | |
1345 | ||
e0c7d767 | 1346 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1347 | /* On NFTL, we have to find the media headers before we can read the |
1348 | BBTs, since they're stored in the media header eraseblocks. */ | |
1349 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1350 | if (!numparts) |
1351 | return -EIO; | |
1da177e4 LT |
1352 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1353 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1354 | NAND_BBT_VERSION; | |
1355 | this->bbt_td->veroffs = 7; | |
1356 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1357 | if (doc->mh1_page != -1) { | |
1358 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1359 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1360 | NAND_BBT_VERSION; | |
1361 | this->bbt_md->veroffs = 7; | |
1362 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1363 | } else { | |
1364 | this->bbt_md = NULL; | |
1365 | } | |
1366 | ||
1367 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1368 | At least as nand_bbt.c is currently written. */ | |
1369 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1370 | return ret; | |
1371 | add_mtd_device(mtd); | |
1372 | #ifdef CONFIG_MTD_PARTITIONS | |
1373 | if (!no_autopart) | |
1374 | add_mtd_partitions(mtd, parts, numparts); | |
1375 | #endif | |
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1380 | { | |
1381 | int ret, numparts; | |
1382 | struct nand_chip *this = mtd->priv; | |
1383 | struct doc_priv *doc = this->priv; | |
1384 | struct mtd_partition parts[5]; | |
1385 | ||
1386 | if (this->numchips > doc->chips_per_floor) { | |
1387 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1388 | return -EIO; | |
1389 | } | |
1390 | ||
1391 | if (DoC_is_MillenniumPlus(doc)) { | |
1392 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1393 | if (inftl_bbt_write) | |
1394 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1395 | this->bbt_td->pages[0] = 2; | |
1396 | this->bbt_md = NULL; | |
1397 | } else { | |
e0c7d767 | 1398 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1399 | if (inftl_bbt_write) |
1400 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1401 | this->bbt_td->offs = 8; | |
1402 | this->bbt_td->len = 8; | |
1403 | this->bbt_td->veroffs = 7; | |
1404 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1405 | this->bbt_td->reserved_block_code = 0x01; | |
1406 | this->bbt_td->pattern = "MSYS_BBT"; | |
1407 | ||
e0c7d767 | 1408 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1409 | if (inftl_bbt_write) |
1410 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1411 | this->bbt_md->offs = 8; | |
1412 | this->bbt_md->len = 8; | |
1413 | this->bbt_md->veroffs = 7; | |
1414 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1415 | this->bbt_md->reserved_block_code = 0x01; | |
1416 | this->bbt_md->pattern = "TBB_SYSM"; | |
1417 | } | |
1418 | ||
1419 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1420 | At least as nand_bbt.c is currently written. */ | |
1421 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1422 | return ret; | |
e0c7d767 | 1423 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1424 | numparts = inftl_partscan(mtd, parts); |
1425 | /* At least for now, require the INFTL Media Header. We could probably | |
1426 | do without it for non-INFTL use, since all it gives us is | |
1427 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1428 | if (!numparts) |
1429 | return -EIO; | |
1da177e4 LT |
1430 | add_mtd_device(mtd); |
1431 | #ifdef CONFIG_MTD_PARTITIONS | |
1432 | if (!no_autopart) | |
1433 | add_mtd_partitions(mtd, parts, numparts); | |
1434 | #endif | |
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1439 | { | |
1440 | struct nand_chip *this = mtd->priv; | |
1441 | struct doc_priv *doc = this->priv; | |
1442 | ||
1da177e4 LT |
1443 | this->read_byte = doc2000_read_byte; |
1444 | this->write_buf = doc2000_writebuf; | |
1445 | this->read_buf = doc2000_readbuf; | |
1446 | this->verify_buf = doc2000_verifybuf; | |
1447 | this->scan_bbt = nftl_scan_bbt; | |
1448 | ||
1449 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1450 | doc2000_count_chips(mtd); | |
1451 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1452 | return (4 * doc->chips_per_floor); | |
1453 | } | |
1454 | ||
1455 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1456 | { | |
1457 | struct nand_chip *this = mtd->priv; | |
1458 | struct doc_priv *doc = this->priv; | |
1459 | ||
1da177e4 LT |
1460 | this->read_byte = doc2001_read_byte; |
1461 | this->write_buf = doc2001_writebuf; | |
1462 | this->read_buf = doc2001_readbuf; | |
1463 | this->verify_buf = doc2001_verifybuf; | |
1464 | ||
1465 | ReadDOC(doc->virtadr, ChipID); | |
1466 | ReadDOC(doc->virtadr, ChipID); | |
1467 | ReadDOC(doc->virtadr, ChipID); | |
1468 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1469 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1470 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1471 | Treat it like a Millennium, except that it |
1472 | can have multiple chips. */ | |
1473 | doc2000_count_chips(mtd); | |
1474 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1475 | this->scan_bbt = inftl_scan_bbt; | |
1476 | return (4 * doc->chips_per_floor); | |
1477 | } else { | |
1478 | /* Bog-standard Millennium */ | |
1479 | doc->chips_per_floor = 1; | |
1480 | mtd->name = "DiskOnChip Millennium"; | |
1481 | this->scan_bbt = nftl_scan_bbt; | |
1482 | return 1; | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1487 | { | |
1488 | struct nand_chip *this = mtd->priv; | |
1489 | struct doc_priv *doc = this->priv; | |
1490 | ||
1da177e4 LT |
1491 | this->read_byte = doc2001plus_read_byte; |
1492 | this->write_buf = doc2001plus_writebuf; | |
1493 | this->read_buf = doc2001plus_readbuf; | |
1494 | this->verify_buf = doc2001plus_verifybuf; | |
1495 | this->scan_bbt = inftl_scan_bbt; | |
7abd3ef9 | 1496 | this->cmd_ctrl = NULL; |
1da177e4 LT |
1497 | this->select_chip = doc2001plus_select_chip; |
1498 | this->cmdfunc = doc2001plus_command; | |
0cddd6c2 | 1499 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1500 | |
1501 | doc->chips_per_floor = 1; | |
1502 | mtd->name = "DiskOnChip Millennium Plus"; | |
1503 | ||
1504 | return 1; | |
1505 | } | |
1506 | ||
858119e1 | 1507 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1508 | { |
1509 | unsigned char ChipID; | |
1510 | struct mtd_info *mtd; | |
1511 | struct nand_chip *nand; | |
1512 | struct doc_priv *doc; | |
1513 | void __iomem *virtadr; | |
1514 | unsigned char save_control; | |
1515 | unsigned char tmp, tmpb, tmpc; | |
1516 | int reg, len, numchips; | |
1517 | int ret = 0; | |
1518 | ||
1519 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1520 | if (!virtadr) { | |
1521 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1522 | return -EIO; | |
1523 | } | |
1524 | ||
1525 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1526 | * bootup procedure will put the device into reset mode, and | |
1527 | * it's not possible to talk to it without actually writing | |
1528 | * to the DOCControl register. So we store the current contents | |
1529 | * of the DOCControl register's location, in case we later decide | |
1530 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1531 | * found it. |
1da177e4 LT |
1532 | */ |
1533 | save_control = ReadDOC(virtadr, DOCControl); | |
1534 | ||
1535 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1536 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1537 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1538 | |
1539 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1540 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1541 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1542 | |
1543 | ChipID = ReadDOC(virtadr, ChipID); | |
1544 | ||
e0c7d767 | 1545 | switch (ChipID) { |
1da177e4 LT |
1546 | case DOC_ChipID_Doc2k: |
1547 | reg = DoC_2k_ECCStatus; | |
1548 | break; | |
1549 | case DOC_ChipID_DocMil: | |
1550 | reg = DoC_ECCConf; | |
1551 | break; | |
1552 | case DOC_ChipID_DocMilPlus16: | |
1553 | case DOC_ChipID_DocMilPlus32: | |
1554 | case 0: | |
1555 | /* Possible Millennium Plus, need to do more checks */ | |
1556 | /* Possibly release from power down mode */ | |
1557 | for (tmp = 0; (tmp < 4); tmp++) | |
1558 | ReadDOC(virtadr, Mplus_Power); | |
1559 | ||
1560 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1561 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1562 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1563 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1564 | ||
1565 | mdelay(1); | |
1566 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1567 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1568 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1569 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1570 | mdelay(1); | |
1571 | ||
1572 | ChipID = ReadDOC(virtadr, ChipID); | |
1573 | ||
1574 | switch (ChipID) { | |
1575 | case DOC_ChipID_DocMilPlus16: | |
1576 | reg = DoC_Mplus_Toggle; | |
1577 | break; | |
1578 | case DOC_ChipID_DocMilPlus32: | |
1579 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1580 | default: | |
1581 | ret = -ENODEV; | |
1582 | goto notfound; | |
1583 | } | |
1584 | break; | |
1585 | ||
1586 | default: | |
1587 | ret = -ENODEV; | |
1588 | goto notfound; | |
1589 | } | |
1590 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1591 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1592 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1593 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1594 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1595 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1596 | ret = -ENODEV; | |
1597 | goto notfound; | |
1598 | } | |
1599 | ||
1600 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1601 | unsigned char oldval; | |
1602 | unsigned char newval; | |
1603 | nand = mtd->priv; | |
1604 | doc = nand->priv; | |
1605 | /* Use the alias resolution register to determine if this is | |
1606 | in fact the same DOC aliased to a new address. If writes | |
1607 | to one chip's alias resolution register change the value on | |
1608 | the other chip, they're the same chip. */ | |
1609 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1610 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1611 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1612 | } else { | |
1613 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1614 | newval = ReadDOC(virtadr, AliasResolution); | |
1615 | } | |
1616 | if (oldval != newval) | |
1617 | continue; | |
1618 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1619 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1620 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1621 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1622 | } else { |
1623 | WriteDOC(~newval, virtadr, AliasResolution); | |
1624 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1625 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1626 | } |
1627 | newval = ~newval; | |
1628 | if (oldval == newval) { | |
1629 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1630 | goto notfound; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1635 | ||
1636 | len = sizeof(struct mtd_info) + | |
e0c7d767 DW |
1637 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
1638 | mtd = kmalloc(len, GFP_KERNEL); | |
1da177e4 LT |
1639 | if (!mtd) { |
1640 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1641 | ret = -ENOMEM; | |
1642 | goto fail; | |
1643 | } | |
1644 | memset(mtd, 0, len); | |
1645 | ||
1646 | nand = (struct nand_chip *) (mtd + 1); | |
1647 | doc = (struct doc_priv *) (nand + 1); | |
1648 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1649 | nand->bbt_md = nand->bbt_td + 1; | |
1650 | ||
1651 | mtd->priv = nand; | |
1652 | mtd->owner = THIS_MODULE; | |
1653 | ||
1654 | nand->priv = doc; | |
1655 | nand->select_chip = doc200x_select_chip; | |
7abd3ef9 | 1656 | nand->cmd_ctrl = doc200x_hwcontrol; |
1da177e4 LT |
1657 | nand->dev_ready = doc200x_dev_ready; |
1658 | nand->waitfunc = doc200x_wait; | |
1659 | nand->block_bad = doc200x_block_bad; | |
6dfc6d25 TG |
1660 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1661 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1662 | nand->ecc.correct = doc200x_correct_data; | |
1da177e4 | 1663 | |
5bd34c09 | 1664 | nand->ecc.layout = &doc200x_oobinfo; |
6dfc6d25 TG |
1665 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; |
1666 | nand->ecc.size = 512; | |
1667 | nand->ecc.bytes = 6; | |
f75e5097 | 1668 | nand->options = NAND_USE_FLASH_BBT; |
1da177e4 LT |
1669 | |
1670 | doc->physadr = physadr; | |
1671 | doc->virtadr = virtadr; | |
1672 | doc->ChipID = ChipID; | |
1673 | doc->curfloor = -1; | |
1674 | doc->curchip = -1; | |
1675 | doc->mh0_page = -1; | |
1676 | doc->mh1_page = -1; | |
1677 | doc->nextdoc = doclist; | |
1678 | ||
1679 | if (ChipID == DOC_ChipID_Doc2k) | |
1680 | numchips = doc2000_init(mtd); | |
1681 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1682 | numchips = doc2001plus_init(mtd); | |
1683 | else | |
1684 | numchips = doc2001_init(mtd); | |
1685 | ||
1686 | if ((ret = nand_scan(mtd, numchips))) { | |
1687 | /* DBB note: i believe nand_release is necessary here, as | |
1688 | buffers may have been allocated in nand_base. Check with | |
1689 | Thomas. FIX ME! */ | |
1690 | /* nand_release will call del_mtd_device, but we haven't yet | |
1691 | added it. This is handled without incident by | |
1692 | del_mtd_device, as far as I can tell. */ | |
1693 | nand_release(mtd); | |
1694 | kfree(mtd); | |
1695 | goto fail; | |
1696 | } | |
1697 | ||
1698 | /* Success! */ | |
1699 | doclist = mtd; | |
1700 | return 0; | |
1701 | ||
e0c7d767 | 1702 | notfound: |
1da177e4 LT |
1703 | /* Put back the contents of the DOCControl register, in case it's not |
1704 | actually a DiskOnChip. */ | |
1705 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1706 | fail: |
1da177e4 LT |
1707 | iounmap(virtadr); |
1708 | return ret; | |
1709 | } | |
1710 | ||
1711 | static void release_nanddoc(void) | |
1712 | { | |
e0c7d767 | 1713 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1714 | struct nand_chip *nand; |
1715 | struct doc_priv *doc; | |
1716 | ||
1717 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1718 | nand = mtd->priv; | |
1719 | doc = nand->priv; | |
1720 | ||
1721 | nextmtd = doc->nextdoc; | |
1722 | nand_release(mtd); | |
1723 | iounmap(doc->virtadr); | |
1724 | kfree(mtd); | |
1725 | } | |
1726 | } | |
1727 | ||
1728 | static int __init init_nanddoc(void) | |
1729 | { | |
1730 | int i, ret = 0; | |
1731 | ||
1732 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1733 | * This way we have it handy, if an error happens |
1da177e4 LT |
1734 | * |
1735 | * Symbolsize is 10 (bits) | |
1736 | * Primitve polynomial is x^10+x^3+1 | |
1737 | * first consecutive root is 510 | |
1738 | * primitve element to generate roots = 1 | |
1739 | * generator polinomial degree = 4 | |
1740 | */ | |
1741 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1742 | if (!rs_decoder) { |
1743 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1744 | return -ENOMEM; |
1745 | } | |
1746 | ||
1747 | if (doc_config_location) { | |
1748 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1749 | ret = doc_probe(doc_config_location); | |
1750 | if (ret < 0) | |
1751 | goto outerr; | |
1752 | } else { | |
e0c7d767 | 1753 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1754 | doc_probe(doc_locations[i]); |
1755 | } | |
1756 | } | |
1757 | /* No banner message any more. Print a message if no DiskOnChip | |
1758 | found, so the user knows we at least tried. */ | |
1759 | if (!doclist) { | |
1760 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1761 | ret = -ENODEV; | |
1762 | goto outerr; | |
1763 | } | |
1764 | return 0; | |
e0c7d767 | 1765 | outerr: |
1da177e4 LT |
1766 | free_rs(rs_decoder); |
1767 | return ret; | |
1768 | } | |
1769 | ||
1770 | static void __exit cleanup_nanddoc(void) | |
1771 | { | |
1772 | /* Cleanup the nand/DoC resources */ | |
1773 | release_nanddoc(); | |
1774 | ||
1775 | /* Free the reed solomon resources */ | |
1776 | if (rs_decoder) { | |
1777 | free_rs(rs_decoder); | |
1778 | } | |
1779 | } | |
1780 | ||
1781 | module_init(init_nanddoc); | |
1782 | module_exit(cleanup_nanddoc); | |
1783 | ||
1784 | MODULE_LICENSE("GPL"); | |
1785 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1786 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); |