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 | ||
98 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd); | |
99 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); | |
100 | ||
e0c7d767 | 101 | static int debug = 0; |
1da177e4 LT |
102 | module_param(debug, int, 0); |
103 | ||
e0c7d767 | 104 | static int try_dword = 1; |
1da177e4 LT |
105 | module_param(try_dword, int, 0); |
106 | ||
e0c7d767 | 107 | static int no_ecc_failures = 0; |
1da177e4 LT |
108 | module_param(no_ecc_failures, int, 0); |
109 | ||
e0c7d767 | 110 | static int no_autopart = 0; |
1da177e4 | 111 | module_param(no_autopart, int, 0); |
1a78ff6b | 112 | |
e0c7d767 | 113 | static int show_firmware_partition = 0; |
1a78ff6b | 114 | module_param(show_firmware_partition, int, 0); |
1da177e4 LT |
115 | |
116 | #ifdef MTD_NAND_DISKONCHIP_BBTWRITE | |
e0c7d767 | 117 | static int inftl_bbt_write = 1; |
1da177e4 | 118 | #else |
e0c7d767 | 119 | static int inftl_bbt_write = 0; |
1da177e4 LT |
120 | #endif |
121 | module_param(inftl_bbt_write, int, 0); | |
122 | ||
651078ba | 123 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
124 | module_param(doc_config_location, ulong, 0); |
125 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
126 | ||
1da177e4 LT |
127 | /* Sector size for HW ECC */ |
128 | #define SECTOR_SIZE 512 | |
129 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
130 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
131 | /* Number of roots */ | |
132 | #define NROOTS 4 | |
133 | /* First consective root */ | |
134 | #define FCR 510 | |
135 | /* Number of symbols */ | |
136 | #define NN 1023 | |
137 | ||
138 | /* the Reed Solomon control structure */ | |
139 | static struct rs_control *rs_decoder; | |
140 | ||
61b03bd7 | 141 | /* |
1da177e4 LT |
142 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
143 | * which we must convert to a standard syndrom usable by the generic | |
144 | * Reed-Solomon library code. | |
145 | * | |
146 | * Fabrice Bellard figured this out in the old docecc code. I added | |
147 | * some comments, improved a minor bit and converted it to make use | |
148 | * of the generic Reed-Solomon libary. tglx | |
149 | */ | |
e0c7d767 | 150 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
151 | { |
152 | int i, j, nerr, errpos[8]; | |
153 | uint8_t parity; | |
154 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
155 | ||
156 | /* Convert the ecc bytes into words */ | |
157 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
158 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
159 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
160 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
161 | parity = ecc[1]; | |
162 | ||
163 | /* Initialize the syndrom buffer */ | |
164 | for (i = 0; i < NROOTS; i++) | |
165 | s[i] = ds[0]; | |
61b03bd7 TG |
166 | /* |
167 | * Evaluate | |
1da177e4 LT |
168 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
169 | * where x = alpha^(FCR + i) | |
170 | */ | |
e0c7d767 DW |
171 | for (j = 1; j < NROOTS; j++) { |
172 | if (ds[j] == 0) | |
1da177e4 LT |
173 | continue; |
174 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 175 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
176 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
177 | } | |
178 | ||
179 | /* Calc s[i] = s[i] / alpha^(v + i) */ | |
180 | for (i = 0; i < NROOTS; i++) { | |
181 | if (syn[i]) | |
e0c7d767 | 182 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
183 | } |
184 | /* Call the decoder library */ | |
185 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
186 | ||
187 | /* Incorrectable errors ? */ | |
188 | if (nerr < 0) | |
189 | return nerr; | |
190 | ||
61b03bd7 | 191 | /* |
1da177e4 LT |
192 | * Correct the errors. The bitpositions are a bit of magic, |
193 | * but they are given by the design of the de/encoder circuit | |
194 | * in the DoC ASIC's. | |
195 | */ | |
e0c7d767 | 196 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
197 | int index, bitpos, pos = 1015 - errpos[i]; |
198 | uint8_t val; | |
199 | if (pos >= NB_DATA && pos < 1019) | |
200 | continue; | |
201 | if (pos < NB_DATA) { | |
202 | /* extract bit position (MSB first) */ | |
203 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
204 | /* now correct the following 10 bits. At most two bytes | |
205 | can be modified since pos is even */ | |
206 | index = (pos >> 3) ^ 1; | |
207 | bitpos = pos & 7; | |
e0c7d767 | 208 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
209 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
210 | parity ^= val; | |
211 | if (index < SECTOR_SIZE) | |
212 | data[index] ^= val; | |
213 | } | |
214 | index = ((pos >> 3) + 1) ^ 1; | |
215 | bitpos = (bitpos + 10) & 7; | |
216 | if (bitpos == 0) | |
217 | bitpos = 8; | |
e0c7d767 DW |
218 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
219 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
220 | parity ^= val; |
221 | if (index < SECTOR_SIZE) | |
222 | data[index] ^= val; | |
223 | } | |
224 | } | |
225 | } | |
226 | /* If the parity is wrong, no rescue possible */ | |
227 | return parity ? -1 : nerr; | |
228 | } | |
229 | ||
230 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
231 | { | |
232 | volatile char dummy; | |
233 | int i; | |
61b03bd7 | 234 | |
1da177e4 LT |
235 | for (i = 0; i < cycles; i++) { |
236 | if (DoC_is_Millennium(doc)) | |
237 | dummy = ReadDOC(doc->virtadr, NOP); | |
238 | else if (DoC_is_MillenniumPlus(doc)) | |
239 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
240 | else | |
241 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
242 | } | |
61b03bd7 | 243 | |
1da177e4 LT |
244 | } |
245 | ||
246 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
247 | ||
248 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
249 | static int _DoC_WaitReady(struct doc_priv *doc) | |
250 | { | |
e0c7d767 | 251 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
252 | unsigned long timeo = jiffies + (HZ * 10); |
253 | ||
e0c7d767 DW |
254 | if (debug) |
255 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
256 | /* Out-of-line routine to wait for chip response */ |
257 | if (DoC_is_MillenniumPlus(doc)) { | |
258 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
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 | } else { | |
267 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
268 | if (time_after(jiffies, timeo)) { | |
269 | printk("_DoC_WaitReady timed out.\n"); | |
270 | return -EIO; | |
271 | } | |
272 | udelay(1); | |
273 | cond_resched(); | |
274 | } | |
275 | } | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
281 | { | |
e0c7d767 | 282 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
283 | int ret = 0; |
284 | ||
285 | if (DoC_is_MillenniumPlus(doc)) { | |
286 | DoC_Delay(doc, 4); | |
287 | ||
288 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
289 | /* Call the out-of-line routine to wait */ | |
290 | ret = _DoC_WaitReady(doc); | |
291 | } else { | |
292 | DoC_Delay(doc, 4); | |
293 | ||
294 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
295 | /* Call the out-of-line routine to wait */ | |
296 | ret = _DoC_WaitReady(doc); | |
297 | DoC_Delay(doc, 2); | |
298 | } | |
299 | ||
e0c7d767 DW |
300 | if (debug) |
301 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
302 | return ret; |
303 | } | |
304 | ||
305 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
306 | { | |
307 | struct nand_chip *this = mtd->priv; | |
308 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 309 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 310 | |
e0c7d767 DW |
311 | if (debug) |
312 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
313 | WriteDOC(datum, docptr, CDSNSlowIO); |
314 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
315 | } | |
316 | ||
317 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
318 | { | |
319 | struct nand_chip *this = mtd->priv; | |
320 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 321 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
322 | u_char ret; |
323 | ||
324 | ReadDOC(docptr, CDSNSlowIO); | |
325 | DoC_Delay(doc, 2); | |
326 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
327 | if (debug) |
328 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
329 | return ret; |
330 | } | |
331 | ||
e0c7d767 | 332 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
333 | { |
334 | struct nand_chip *this = mtd->priv; | |
335 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 336 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 337 | int i; |
e0c7d767 DW |
338 | if (debug) |
339 | printk("writebuf of %d bytes: ", len); | |
340 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
341 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
342 | if (debug && i < 16) | |
343 | printk("%02x ", buf[i]); | |
344 | } | |
e0c7d767 DW |
345 | if (debug) |
346 | printk("\n"); | |
1da177e4 LT |
347 | } |
348 | ||
e0c7d767 | 349 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
350 | { |
351 | struct nand_chip *this = mtd->priv; | |
352 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
353 | void __iomem *docptr = doc->virtadr; |
354 | int i; | |
1da177e4 | 355 | |
e0c7d767 DW |
356 | if (debug) |
357 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 358 | |
e0c7d767 | 359 | for (i = 0; i < len; i++) { |
1da177e4 LT |
360 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
361 | } | |
362 | } | |
363 | ||
e0c7d767 | 364 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
365 | { |
366 | struct nand_chip *this = mtd->priv; | |
367 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
368 | void __iomem *docptr = doc->virtadr; |
369 | int i; | |
1da177e4 | 370 | |
e0c7d767 DW |
371 | if (debug) |
372 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 373 | |
e0c7d767 DW |
374 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
375 | for (i = 0; i < len; i++) { | |
376 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 LT |
377 | } |
378 | } else { | |
e0c7d767 DW |
379 | for (i = 0; i < len; i += 4) { |
380 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
381 | } |
382 | } | |
383 | } | |
384 | ||
e0c7d767 | 385 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
386 | { |
387 | struct nand_chip *this = mtd->priv; | |
388 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 389 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
390 | int i; |
391 | ||
e0c7d767 | 392 | for (i = 0; i < len; i++) |
1da177e4 LT |
393 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
394 | return -EFAULT; | |
395 | return 0; | |
396 | } | |
397 | ||
398 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
399 | { | |
400 | struct nand_chip *this = mtd->priv; | |
401 | struct doc_priv *doc = this->priv; | |
402 | uint16_t ret; | |
403 | ||
404 | doc200x_select_chip(mtd, nr); | |
405 | doc200x_hwcontrol(mtd, NAND_CTL_SETCLE); | |
406 | this->write_byte(mtd, NAND_CMD_READID); | |
407 | doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE); | |
408 | doc200x_hwcontrol(mtd, NAND_CTL_SETALE); | |
409 | this->write_byte(mtd, 0); | |
410 | doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); | |
61b03bd7 | 411 | |
dfd61294 | 412 | /* We cant' use dev_ready here, but at least we wait for the |
61b03bd7 | 413 | * command to complete |
dfd61294 TG |
414 | */ |
415 | udelay(50); | |
61b03bd7 | 416 | |
1da177e4 LT |
417 | ret = this->read_byte(mtd) << 8; |
418 | ret |= this->read_byte(mtd); | |
419 | ||
420 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
421 | /* First chip probe. See if we get same results by 32-bit access */ | |
422 | union { | |
423 | uint32_t dword; | |
424 | uint8_t byte[4]; | |
425 | } ident; | |
426 | void __iomem *docptr = doc->virtadr; | |
427 | ||
428 | doc200x_hwcontrol(mtd, NAND_CTL_SETCLE); | |
429 | doc2000_write_byte(mtd, NAND_CMD_READID); | |
430 | doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE); | |
431 | doc200x_hwcontrol(mtd, NAND_CTL_SETALE); | |
432 | doc2000_write_byte(mtd, 0); | |
433 | doc200x_hwcontrol(mtd, NAND_CTL_CLRALE); | |
434 | ||
dfd61294 TG |
435 | udelay(50); |
436 | ||
1da177e4 LT |
437 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
438 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
439 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
440 | this->read_buf = &doc2000_readbuf_dword; | |
441 | } | |
442 | } | |
61b03bd7 | 443 | |
1da177e4 LT |
444 | return ret; |
445 | } | |
446 | ||
447 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
448 | { | |
449 | struct nand_chip *this = mtd->priv; | |
450 | struct doc_priv *doc = this->priv; | |
451 | uint16_t mfrid; | |
452 | int i; | |
453 | ||
454 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
455 | doc->chips_per_floor = 4; | |
456 | ||
457 | /* Find out what the first chip is */ | |
458 | mfrid = doc200x_ident_chip(mtd, 0); | |
459 | ||
460 | /* Find how many chips in each floor. */ | |
461 | for (i = 1; i < 4; i++) { | |
462 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
463 | break; | |
464 | } | |
465 | doc->chips_per_floor = i; | |
466 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
467 | } | |
468 | ||
469 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state) | |
470 | { | |
471 | struct doc_priv *doc = this->priv; | |
472 | ||
473 | int status; | |
61b03bd7 | 474 | |
1da177e4 LT |
475 | DoC_WaitReady(doc); |
476 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
477 | DoC_WaitReady(doc); | |
478 | status = (int)this->read_byte(mtd); | |
479 | ||
480 | return status; | |
481 | } | |
482 | ||
483 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
484 | { | |
485 | struct nand_chip *this = mtd->priv; | |
486 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 487 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
488 | |
489 | WriteDOC(datum, docptr, CDSNSlowIO); | |
490 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
491 | WriteDOC(datum, docptr, WritePipeTerm); | |
492 | } | |
493 | ||
494 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
495 | { | |
496 | struct nand_chip *this = mtd->priv; | |
497 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 498 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
499 | |
500 | //ReadDOC(docptr, CDSNSlowIO); | |
501 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
502 | DoC_Delay(doc, 2); | |
503 | ReadDOC(docptr, ReadPipeInit); | |
504 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
505 | return ReadDOC(docptr, LastDataRead); | |
506 | } | |
507 | ||
e0c7d767 | 508 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
509 | { |
510 | struct nand_chip *this = mtd->priv; | |
511 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 512 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
513 | int i; |
514 | ||
e0c7d767 | 515 | for (i = 0; i < len; i++) |
1da177e4 LT |
516 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
517 | /* Terminate write pipeline */ | |
518 | WriteDOC(0x00, docptr, WritePipeTerm); | |
519 | } | |
520 | ||
e0c7d767 | 521 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
522 | { |
523 | struct nand_chip *this = mtd->priv; | |
524 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 525 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
526 | int i; |
527 | ||
528 | /* Start read pipeline */ | |
529 | ReadDOC(docptr, ReadPipeInit); | |
530 | ||
e0c7d767 | 531 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
532 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
533 | ||
534 | /* Terminate read pipeline */ | |
535 | buf[i] = ReadDOC(docptr, LastDataRead); | |
536 | } | |
537 | ||
e0c7d767 | 538 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
539 | { |
540 | struct nand_chip *this = mtd->priv; | |
541 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 542 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
543 | int i; |
544 | ||
545 | /* Start read pipeline */ | |
546 | ReadDOC(docptr, ReadPipeInit); | |
547 | ||
e0c7d767 | 548 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
549 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
550 | ReadDOC(docptr, LastDataRead); | |
551 | return i; | |
552 | } | |
553 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
554 | return i; | |
555 | return 0; | |
556 | } | |
557 | ||
558 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
559 | { | |
560 | struct nand_chip *this = mtd->priv; | |
561 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 562 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
563 | u_char ret; |
564 | ||
e0c7d767 DW |
565 | ReadDOC(docptr, Mplus_ReadPipeInit); |
566 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
567 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
568 | if (debug) | |
569 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
570 | return ret; |
571 | } | |
572 | ||
e0c7d767 | 573 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
574 | { |
575 | struct nand_chip *this = mtd->priv; | |
576 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 577 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
578 | int i; |
579 | ||
e0c7d767 DW |
580 | if (debug) |
581 | printk("writebuf of %d bytes: ", len); | |
582 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
583 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
584 | if (debug && i < 16) | |
585 | printk("%02x ", buf[i]); | |
586 | } | |
e0c7d767 DW |
587 | if (debug) |
588 | printk("\n"); | |
1da177e4 LT |
589 | } |
590 | ||
e0c7d767 | 591 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
592 | { |
593 | struct nand_chip *this = mtd->priv; | |
594 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 595 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
596 | int i; |
597 | ||
e0c7d767 DW |
598 | if (debug) |
599 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
600 | |
601 | /* Start read pipeline */ | |
602 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
603 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
604 | ||
e0c7d767 | 605 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
606 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
607 | if (debug && i < 16) | |
608 | printk("%02x ", buf[i]); | |
609 | } | |
610 | ||
611 | /* Terminate read pipeline */ | |
e0c7d767 | 612 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 613 | if (debug && i < 16) |
e0c7d767 DW |
614 | printk("%02x ", buf[len - 2]); |
615 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 616 | if (debug && i < 16) |
e0c7d767 DW |
617 | printk("%02x ", buf[len - 1]); |
618 | if (debug) | |
619 | printk("\n"); | |
1da177e4 LT |
620 | } |
621 | ||
e0c7d767 | 622 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
623 | { |
624 | struct nand_chip *this = mtd->priv; | |
625 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 626 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
627 | int i; |
628 | ||
e0c7d767 DW |
629 | if (debug) |
630 | printk("verifybuf of %d bytes: ", len); | |
1da177e4 LT |
631 | |
632 | /* Start read pipeline */ | |
633 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
634 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
635 | ||
e0c7d767 | 636 | for (i = 0; i < len - 2; i++) |
1da177e4 LT |
637 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
638 | ReadDOC(docptr, Mplus_LastDataRead); | |
639 | ReadDOC(docptr, Mplus_LastDataRead); | |
640 | return i; | |
641 | } | |
e0c7d767 DW |
642 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
643 | return len - 2; | |
644 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
645 | return len - 1; | |
1da177e4 LT |
646 | return 0; |
647 | } | |
648 | ||
649 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
650 | { | |
651 | struct nand_chip *this = mtd->priv; | |
652 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 653 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
654 | int floor = 0; |
655 | ||
e0c7d767 DW |
656 | if (debug) |
657 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
658 | |
659 | if (chip == -1) { | |
660 | /* Disable flash internally */ | |
661 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
662 | return; | |
663 | } | |
664 | ||
665 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 666 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
667 | |
668 | /* Assert ChipEnable and deassert WriteProtect */ | |
669 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
670 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
671 | ||
672 | doc->curchip = chip; | |
673 | doc->curfloor = floor; | |
674 | } | |
675 | ||
676 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
677 | { | |
678 | struct nand_chip *this = mtd->priv; | |
679 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 680 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
681 | int floor = 0; |
682 | ||
e0c7d767 DW |
683 | if (debug) |
684 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
685 | |
686 | if (chip == -1) | |
687 | return; | |
688 | ||
689 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 690 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
691 | |
692 | /* 11.4.4 -- deassert CE before changing chip */ | |
693 | doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE); | |
694 | ||
695 | WriteDOC(floor, docptr, FloorSelect); | |
696 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
697 | ||
698 | doc200x_hwcontrol(mtd, NAND_CTL_SETNCE); | |
699 | ||
700 | doc->curchip = chip; | |
701 | doc->curfloor = floor; | |
702 | } | |
703 | ||
704 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd) | |
705 | { | |
706 | struct nand_chip *this = mtd->priv; | |
707 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 708 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 709 | |
e0c7d767 | 710 | switch (cmd) { |
1da177e4 LT |
711 | case NAND_CTL_SETNCE: |
712 | doc->CDSNControl |= CDSN_CTRL_CE; | |
713 | break; | |
714 | case NAND_CTL_CLRNCE: | |
715 | doc->CDSNControl &= ~CDSN_CTRL_CE; | |
716 | break; | |
717 | case NAND_CTL_SETCLE: | |
718 | doc->CDSNControl |= CDSN_CTRL_CLE; | |
719 | break; | |
720 | case NAND_CTL_CLRCLE: | |
721 | doc->CDSNControl &= ~CDSN_CTRL_CLE; | |
722 | break; | |
723 | case NAND_CTL_SETALE: | |
724 | doc->CDSNControl |= CDSN_CTRL_ALE; | |
725 | break; | |
726 | case NAND_CTL_CLRALE: | |
727 | doc->CDSNControl &= ~CDSN_CTRL_ALE; | |
728 | break; | |
729 | case NAND_CTL_SETWP: | |
730 | doc->CDSNControl |= CDSN_CTRL_WP; | |
731 | break; | |
732 | case NAND_CTL_CLRWP: | |
733 | doc->CDSNControl &= ~CDSN_CTRL_WP; | |
734 | break; | |
735 | } | |
e0c7d767 DW |
736 | if (debug) |
737 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
1da177e4 LT |
738 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); |
739 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
740 | DoC_Delay(doc, 4); | |
741 | } | |
742 | ||
e0c7d767 | 743 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
744 | { |
745 | struct nand_chip *this = mtd->priv; | |
746 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 747 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
748 | |
749 | /* | |
750 | * Must terminate write pipeline before sending any commands | |
751 | * to the device. | |
752 | */ | |
753 | if (command == NAND_CMD_PAGEPROG) { | |
754 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
755 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
756 | } | |
757 | ||
758 | /* | |
759 | * Write out the command to the device. | |
760 | */ | |
761 | if (command == NAND_CMD_SEQIN) { | |
762 | int readcmd; | |
763 | ||
764 | if (column >= mtd->oobblock) { | |
765 | /* OOB area */ | |
766 | column -= mtd->oobblock; | |
767 | readcmd = NAND_CMD_READOOB; | |
768 | } else if (column < 256) { | |
769 | /* First 256 bytes --> READ0 */ | |
770 | readcmd = NAND_CMD_READ0; | |
771 | } else { | |
772 | column -= 256; | |
773 | readcmd = NAND_CMD_READ1; | |
774 | } | |
775 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
776 | } | |
777 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
778 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
779 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
780 | ||
781 | if (column != -1 || page_addr != -1) { | |
782 | /* Serially input address */ | |
783 | if (column != -1) { | |
784 | /* Adjust columns for 16 bit buswidth */ | |
785 | if (this->options & NAND_BUSWIDTH_16) | |
786 | column >>= 1; | |
787 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
788 | } | |
789 | if (page_addr != -1) { | |
e0c7d767 DW |
790 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
791 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
792 | /* One more address cycle for higher density devices */ |
793 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 794 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
795 | printk("high density\n"); |
796 | } | |
797 | } | |
798 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
799 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
800 | /* deassert ALE */ | |
e0c7d767 DW |
801 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
802 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
803 | WriteDOC(0, docptr, Mplus_FlashControl); |
804 | } | |
805 | ||
61b03bd7 | 806 | /* |
1da177e4 LT |
807 | * program and erase have their own busy handlers |
808 | * status and sequential in needs no delay | |
e0c7d767 | 809 | */ |
1da177e4 LT |
810 | switch (command) { |
811 | ||
812 | case NAND_CMD_PAGEPROG: | |
813 | case NAND_CMD_ERASE1: | |
814 | case NAND_CMD_ERASE2: | |
815 | case NAND_CMD_SEQIN: | |
816 | case NAND_CMD_STATUS: | |
817 | return; | |
818 | ||
819 | case NAND_CMD_RESET: | |
820 | if (this->dev_ready) | |
821 | break; | |
822 | udelay(this->chip_delay); | |
823 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
824 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
825 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 826 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
827 | return; |
828 | ||
e0c7d767 | 829 | /* This applies to read commands */ |
1da177e4 | 830 | default: |
61b03bd7 | 831 | /* |
1da177e4 LT |
832 | * If we don't have access to the busy pin, we apply the given |
833 | * command delay | |
e0c7d767 | 834 | */ |
1da177e4 | 835 | if (!this->dev_ready) { |
e0c7d767 | 836 | udelay(this->chip_delay); |
1da177e4 LT |
837 | return; |
838 | } | |
839 | } | |
840 | ||
841 | /* Apply this short delay always to ensure that we do wait tWB in | |
842 | * any case on any machine. */ | |
e0c7d767 | 843 | ndelay(100); |
1da177e4 | 844 | /* wait until command is processed */ |
e0c7d767 | 845 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
846 | } |
847 | ||
848 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
849 | { | |
850 | struct nand_chip *this = mtd->priv; | |
851 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 852 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
853 | |
854 | if (DoC_is_MillenniumPlus(doc)) { | |
855 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
856 | DoC_Delay(doc, 4); | |
857 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 858 | if (debug) |
1da177e4 LT |
859 | printk("not ready\n"); |
860 | return 0; | |
861 | } | |
e0c7d767 DW |
862 | if (debug) |
863 | printk("was ready\n"); | |
1da177e4 LT |
864 | return 1; |
865 | } else { | |
866 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
867 | DoC_Delay(doc, 4); | |
868 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 869 | if (debug) |
1da177e4 LT |
870 | printk("not ready\n"); |
871 | return 0; | |
872 | } | |
873 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
874 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
875 | if (debug) |
876 | printk("was ready\n"); | |
1da177e4 LT |
877 | return 1; |
878 | } | |
879 | } | |
880 | ||
881 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
882 | { | |
883 | /* This is our last resort if we couldn't find or create a BBT. Just | |
884 | pretend all blocks are good. */ | |
885 | return 0; | |
886 | } | |
887 | ||
888 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
889 | { | |
890 | struct nand_chip *this = mtd->priv; | |
891 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 892 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
893 | |
894 | /* Prime the ECC engine */ | |
e0c7d767 | 895 | switch (mode) { |
1da177e4 LT |
896 | case NAND_ECC_READ: |
897 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
898 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
899 | break; | |
900 | case NAND_ECC_WRITE: | |
901 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
902 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
903 | break; | |
904 | } | |
905 | } | |
906 | ||
907 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
908 | { | |
909 | struct nand_chip *this = mtd->priv; | |
910 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 911 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
912 | |
913 | /* Prime the ECC engine */ | |
e0c7d767 | 914 | switch (mode) { |
1da177e4 LT |
915 | case NAND_ECC_READ: |
916 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
917 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
918 | break; | |
919 | case NAND_ECC_WRITE: | |
920 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
921 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
922 | break; | |
923 | } | |
924 | } | |
925 | ||
926 | /* This code is only called on write */ | |
e0c7d767 | 927 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 LT |
928 | { |
929 | struct nand_chip *this = mtd->priv; | |
930 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 931 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
932 | int i; |
933 | int emptymatch = 1; | |
934 | ||
935 | /* flush the pipeline */ | |
936 | if (DoC_is_2000(doc)) { | |
937 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
938 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
939 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
940 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
941 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
942 | } else if (DoC_is_MillenniumPlus(doc)) { | |
943 | WriteDOC(0, docptr, Mplus_NOP); | |
944 | WriteDOC(0, docptr, Mplus_NOP); | |
945 | WriteDOC(0, docptr, Mplus_NOP); | |
946 | } else { | |
947 | WriteDOC(0, docptr, NOP); | |
948 | WriteDOC(0, docptr, NOP); | |
949 | WriteDOC(0, docptr, NOP); | |
950 | } | |
951 | ||
952 | for (i = 0; i < 6; i++) { | |
953 | if (DoC_is_MillenniumPlus(doc)) | |
954 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 955 | else |
1da177e4 LT |
956 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
957 | if (ecc_code[i] != empty_write_ecc[i]) | |
958 | emptymatch = 0; | |
959 | } | |
960 | if (DoC_is_MillenniumPlus(doc)) | |
961 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
962 | else | |
963 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
964 | #if 0 | |
965 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
966 | if (emptymatch) { | |
967 | /* Note: this somewhat expensive test should not be triggered | |
968 | often. It could be optimized away by examining the data in | |
969 | the writebuf routine, and remembering the result. */ | |
970 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
971 | if (dat[i] == 0xff) |
972 | continue; | |
1da177e4 LT |
973 | emptymatch = 0; |
974 | break; | |
975 | } | |
976 | } | |
977 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
978 | Return all-0xff ecc value instead of the computed one, so | |
979 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
980 | if (emptymatch) |
981 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
982 | #endif |
983 | return 0; | |
984 | } | |
985 | ||
986 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc) | |
987 | { | |
988 | int i, ret = 0; | |
989 | struct nand_chip *this = mtd->priv; | |
990 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 991 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
992 | volatile u_char dummy; |
993 | int emptymatch = 1; | |
61b03bd7 | 994 | |
1da177e4 LT |
995 | /* flush the pipeline */ |
996 | if (DoC_is_2000(doc)) { | |
997 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
998 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
999 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
1000 | } else if (DoC_is_MillenniumPlus(doc)) { | |
1001 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
1002 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
1003 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
1004 | } else { | |
1005 | dummy = ReadDOC(docptr, ECCConf); | |
1006 | dummy = ReadDOC(docptr, ECCConf); | |
1007 | dummy = ReadDOC(docptr, ECCConf); | |
1008 | } | |
61b03bd7 | 1009 | |
1da177e4 LT |
1010 | /* Error occured ? */ |
1011 | if (dummy & 0x80) { | |
1012 | for (i = 0; i < 6; i++) { | |
1013 | if (DoC_is_MillenniumPlus(doc)) | |
1014 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
1015 | else | |
1016 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
1017 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
1018 | emptymatch = 0; | |
1019 | } | |
1020 | /* If emptymatch=1, the read syndrome is consistent with an | |
1021 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1022 | if (emptymatch) { | |
1023 | for (i = 0; i < 6; i++) { | |
e0c7d767 DW |
1024 | if (read_ecc[i] == 0xff) |
1025 | continue; | |
1da177e4 LT |
1026 | emptymatch = 0; |
1027 | break; | |
1028 | } | |
1029 | } | |
1030 | /* If emptymatch still =1, check the data block. */ | |
1031 | if (emptymatch) { | |
e0c7d767 DW |
1032 | /* Note: this somewhat expensive test should not be triggered |
1033 | often. It could be optimized away by examining the data in | |
1034 | the readbuf routine, and remembering the result. */ | |
1da177e4 | 1035 | for (i = 0; i < 512; i++) { |
e0c7d767 DW |
1036 | if (dat[i] == 0xff) |
1037 | continue; | |
1da177e4 LT |
1038 | emptymatch = 0; |
1039 | break; | |
1040 | } | |
1041 | } | |
1042 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1043 | erased block, in which case the ECC will not come out right. | |
1044 | We'll suppress the error and tell the caller everything's | |
1045 | OK. Because it is. */ | |
e0c7d767 DW |
1046 | if (!emptymatch) |
1047 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
1048 | if (ret > 0) |
1049 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 1050 | } |
1da177e4 LT |
1051 | if (DoC_is_MillenniumPlus(doc)) |
1052 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1053 | else | |
1054 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
1055 | if (no_ecc_failures && (ret == -1)) { | |
1056 | printk(KERN_ERR "suppressing ECC failure\n"); | |
1057 | ret = 0; | |
1058 | } | |
1059 | return ret; | |
1060 | } | |
61b03bd7 | 1061 | |
1da177e4 LT |
1062 | //u_char mydatabuf[528]; |
1063 | ||
abc37e67 DB |
1064 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
1065 | * attempt to retain compatibility. It used to read: | |
1066 | * .oobfree = { {8, 8} } | |
1067 | * Since that leaves two bytes unusable, it was changed. But the following | |
1068 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1069 | * .oobfree = { {6, 10} } | |
1070 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1071 | * safer. The only problem with it is that any code that parses oobfree must | |
1072 | * be able to handle out-of-order segments. | |
1073 | */ | |
1da177e4 | 1074 | static struct nand_oobinfo doc200x_oobinfo = { |
e0c7d767 DW |
1075 | .useecc = MTD_NANDECC_AUTOPLACE, |
1076 | .eccbytes = 6, | |
1077 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
1078 | .oobfree = {{8, 8}, {6, 2}} | |
1da177e4 | 1079 | }; |
61b03bd7 | 1080 | |
1da177e4 LT |
1081 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
1082 | On sucessful return, buf will contain a copy of the media header for | |
1083 | further processing. id is the string to scan for, and will presumably be | |
1084 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1085 | header. The page #s of the found media headers are placed in mh0_page and | |
1086 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1087 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 LT |
1088 | { |
1089 | struct nand_chip *this = mtd->priv; | |
1090 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1091 | unsigned offs; |
1da177e4 LT |
1092 | int ret; |
1093 | size_t retlen; | |
1094 | ||
1a78ff6b | 1095 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
1da177e4 | 1096 | ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf); |
e0c7d767 DW |
1097 | if (retlen != mtd->oobblock) |
1098 | continue; | |
1da177e4 | 1099 | if (ret) { |
e0c7d767 | 1100 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1101 | } |
e0c7d767 DW |
1102 | if (memcmp(buf, id, 6)) |
1103 | continue; | |
1da177e4 LT |
1104 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1105 | if (doc->mh0_page == -1) { | |
1106 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1107 | if (!findmirror) |
1108 | return 1; | |
1da177e4 LT |
1109 | continue; |
1110 | } | |
1111 | doc->mh1_page = offs >> this->page_shift; | |
1112 | return 2; | |
1113 | } | |
1114 | if (doc->mh0_page == -1) { | |
1115 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1116 | return 0; | |
1117 | } | |
1118 | /* Only one mediaheader was found. We want buf to contain a | |
1119 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1120 | offs = doc->mh0_page << this->page_shift; | |
1121 | ret = mtd->read(mtd, offs, mtd->oobblock, &retlen, buf); | |
1122 | if (retlen != mtd->oobblock) { | |
1123 | /* Insanity. Give up. */ | |
1124 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1125 | return 0; | |
1126 | } | |
1127 | return 1; | |
1128 | } | |
1129 | ||
e0c7d767 | 1130 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1131 | { |
1132 | struct nand_chip *this = mtd->priv; | |
1133 | struct doc_priv *doc = this->priv; | |
1134 | int ret = 0; | |
1135 | u_char *buf; | |
1136 | struct NFTLMediaHeader *mh; | |
1137 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1138 | int numparts = 0; |
1da177e4 LT |
1139 | unsigned blocks, maxblocks; |
1140 | int offs, numheaders; | |
1141 | ||
1142 | buf = kmalloc(mtd->oobblock, GFP_KERNEL); | |
1143 | if (!buf) { | |
1144 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1145 | return 0; | |
1146 | } | |
e0c7d767 DW |
1147 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1148 | goto out; | |
1149 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1150 | |
f29a4b86 TG |
1151 | mh->NumEraseUnits = le16_to_cpu(mh->NumEraseUnits); |
1152 | mh->FirstPhysicalEUN = le16_to_cpu(mh->FirstPhysicalEUN); | |
1153 | mh->FormattedSize = le32_to_cpu(mh->FormattedSize); | |
1154 | ||
1da177e4 LT |
1155 | printk(KERN_INFO " DataOrgID = %s\n" |
1156 | " NumEraseUnits = %d\n" | |
1157 | " FirstPhysicalEUN = %d\n" | |
1158 | " FormattedSize = %d\n" | |
1159 | " UnitSizeFactor = %d\n", | |
1160 | mh->DataOrgID, mh->NumEraseUnits, | |
1161 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1162 | mh->UnitSizeFactor); | |
1da177e4 LT |
1163 | |
1164 | blocks = mtd->size >> this->phys_erase_shift; | |
1165 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1166 | ||
1167 | if (mh->UnitSizeFactor == 0x00) { | |
1168 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1169 | - There can be at most 32768 virtual blocks. | |
1170 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1171 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1172 | */ | |
1da177e4 LT |
1173 | mh->UnitSizeFactor = 0xff; |
1174 | while (blocks > maxblocks) { | |
1175 | blocks >>= 1; | |
1176 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1177 | mh->UnitSizeFactor--; | |
1178 | } | |
1179 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1180 | } | |
1181 | ||
1182 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1183 | layers; variables with have already been configured by nand_scan. | |
1184 | Unfortunately, we didn't know before this point what these values | |
1185 | should be. Thus, this code is somewhat dependant on the exact | |
1186 | implementation of the NAND layer. */ | |
1187 | if (mh->UnitSizeFactor != 0xff) { | |
1188 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1189 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1190 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1191 | blocks = mtd->size >> this->bbt_erase_shift; | |
1192 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1193 | } | |
1194 | ||
1195 | if (blocks > maxblocks) { | |
1196 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1197 | goto out; | |
1198 | } | |
1199 | ||
1200 | /* Skip past the media headers. */ | |
1201 | offs = max(doc->mh0_page, doc->mh1_page); | |
1202 | offs <<= this->page_shift; | |
1203 | offs += mtd->erasesize; | |
1204 | ||
1a78ff6b DB |
1205 | if (show_firmware_partition == 1) { |
1206 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1207 | parts[0].offset = 0; | |
1208 | parts[0].size = offs; | |
1209 | numparts = 1; | |
1210 | } | |
1211 | ||
1212 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1213 | parts[numparts].offset = offs; | |
1214 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1215 | ||
1216 | offs += parts[numparts].size; | |
1217 | numparts++; | |
1da177e4 | 1218 | |
1da177e4 | 1219 | if (offs < mtd->size) { |
1a78ff6b DB |
1220 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1221 | parts[numparts].offset = offs; | |
1222 | parts[numparts].size = mtd->size - offs; | |
1223 | numparts++; | |
1da177e4 | 1224 | } |
1a78ff6b DB |
1225 | |
1226 | ret = numparts; | |
e0c7d767 | 1227 | out: |
1da177e4 LT |
1228 | kfree(buf); |
1229 | return ret; | |
1230 | } | |
1231 | ||
1232 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1233 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1234 | { |
1235 | struct nand_chip *this = mtd->priv; | |
1236 | struct doc_priv *doc = this->priv; | |
1237 | int ret = 0; | |
1238 | u_char *buf; | |
1239 | struct INFTLMediaHeader *mh; | |
1240 | struct INFTLPartition *ip; | |
1241 | int numparts = 0; | |
1242 | int blocks; | |
1243 | int vshift, lastvunit = 0; | |
1244 | int i; | |
1245 | int end = mtd->size; | |
1246 | ||
1247 | if (inftl_bbt_write) | |
1248 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1249 | ||
1250 | buf = kmalloc(mtd->oobblock, GFP_KERNEL); | |
1251 | if (!buf) { | |
1252 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1253 | return 0; | |
1254 | } | |
1255 | ||
e0c7d767 DW |
1256 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1257 | goto out; | |
1da177e4 | 1258 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1259 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 LT |
1260 | |
1261 | mh->NoOfBootImageBlocks = le32_to_cpu(mh->NoOfBootImageBlocks); | |
1262 | mh->NoOfBinaryPartitions = le32_to_cpu(mh->NoOfBinaryPartitions); | |
1263 | mh->NoOfBDTLPartitions = le32_to_cpu(mh->NoOfBDTLPartitions); | |
1264 | mh->BlockMultiplierBits = le32_to_cpu(mh->BlockMultiplierBits); | |
1265 | mh->FormatFlags = le32_to_cpu(mh->FormatFlags); | |
1266 | mh->PercentUsed = le32_to_cpu(mh->PercentUsed); | |
61b03bd7 | 1267 | |
1da177e4 LT |
1268 | printk(KERN_INFO " bootRecordID = %s\n" |
1269 | " NoOfBootImageBlocks = %d\n" | |
1270 | " NoOfBinaryPartitions = %d\n" | |
1271 | " NoOfBDTLPartitions = %d\n" | |
1272 | " BlockMultiplerBits = %d\n" | |
1273 | " FormatFlgs = %d\n" | |
1274 | " OsakVersion = %d.%d.%d.%d\n" | |
1275 | " PercentUsed = %d\n", | |
1276 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1277 | mh->NoOfBinaryPartitions, | |
1278 | mh->NoOfBDTLPartitions, | |
1279 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1280 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1281 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1282 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1283 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1284 | mh->PercentUsed); | |
1da177e4 LT |
1285 | |
1286 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1287 | ||
1288 | blocks = mtd->size >> vshift; | |
1289 | if (blocks > 32768) { | |
1290 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1291 | goto out; | |
1292 | } | |
1293 | ||
1294 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1295 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1296 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1297 | goto out; | |
1298 | } | |
1299 | ||
1300 | /* Scan the partitions */ | |
1301 | for (i = 0; (i < 4); i++) { | |
1302 | ip = &(mh->Partitions[i]); | |
1303 | ip->virtualUnits = le32_to_cpu(ip->virtualUnits); | |
1304 | ip->firstUnit = le32_to_cpu(ip->firstUnit); | |
1305 | ip->lastUnit = le32_to_cpu(ip->lastUnit); | |
1306 | ip->flags = le32_to_cpu(ip->flags); | |
1307 | ip->spareUnits = le32_to_cpu(ip->spareUnits); | |
1308 | ip->Reserved0 = le32_to_cpu(ip->Reserved0); | |
1309 | ||
1da177e4 LT |
1310 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1311 | " virtualUnits = %d\n" | |
1312 | " firstUnit = %d\n" | |
1313 | " lastUnit = %d\n" | |
1314 | " flags = 0x%x\n" | |
1315 | " spareUnits = %d\n", | |
1316 | i, ip->virtualUnits, ip->firstUnit, | |
1317 | ip->lastUnit, ip->flags, | |
1318 | ip->spareUnits); | |
1da177e4 | 1319 | |
1a78ff6b DB |
1320 | if ((show_firmware_partition == 1) && |
1321 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1322 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1323 | parts[0].offset = 0; | |
1324 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1325 | numparts = 1; | |
1326 | } | |
1da177e4 LT |
1327 | |
1328 | if (ip->flags & INFTL_BINARY) | |
1329 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1330 | else | |
1331 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1332 | parts[numparts].offset = ip->firstUnit << vshift; | |
1333 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1334 | numparts++; | |
e0c7d767 DW |
1335 | if (ip->lastUnit > lastvunit) |
1336 | lastvunit = ip->lastUnit; | |
1337 | if (ip->flags & INFTL_LAST) | |
1338 | break; | |
1da177e4 LT |
1339 | } |
1340 | lastvunit++; | |
1341 | if ((lastvunit << vshift) < end) { | |
1342 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1343 | parts[numparts].offset = lastvunit << vshift; | |
1344 | parts[numparts].size = end - parts[numparts].offset; | |
1345 | numparts++; | |
1346 | } | |
1347 | ret = numparts; | |
e0c7d767 | 1348 | out: |
1da177e4 LT |
1349 | kfree(buf); |
1350 | return ret; | |
1351 | } | |
1352 | ||
1353 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1354 | { | |
1355 | int ret, numparts; | |
1356 | struct nand_chip *this = mtd->priv; | |
1357 | struct doc_priv *doc = this->priv; | |
1358 | struct mtd_partition parts[2]; | |
1359 | ||
e0c7d767 | 1360 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1361 | /* On NFTL, we have to find the media headers before we can read the |
1362 | BBTs, since they're stored in the media header eraseblocks. */ | |
1363 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1364 | if (!numparts) |
1365 | return -EIO; | |
1da177e4 LT |
1366 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1367 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1368 | NAND_BBT_VERSION; | |
1369 | this->bbt_td->veroffs = 7; | |
1370 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1371 | if (doc->mh1_page != -1) { | |
1372 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1373 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1374 | NAND_BBT_VERSION; | |
1375 | this->bbt_md->veroffs = 7; | |
1376 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1377 | } else { | |
1378 | this->bbt_md = NULL; | |
1379 | } | |
1380 | ||
1381 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1382 | At least as nand_bbt.c is currently written. */ | |
1383 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1384 | return ret; | |
1385 | add_mtd_device(mtd); | |
1386 | #ifdef CONFIG_MTD_PARTITIONS | |
1387 | if (!no_autopart) | |
1388 | add_mtd_partitions(mtd, parts, numparts); | |
1389 | #endif | |
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1394 | { | |
1395 | int ret, numparts; | |
1396 | struct nand_chip *this = mtd->priv; | |
1397 | struct doc_priv *doc = this->priv; | |
1398 | struct mtd_partition parts[5]; | |
1399 | ||
1400 | if (this->numchips > doc->chips_per_floor) { | |
1401 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1402 | return -EIO; | |
1403 | } | |
1404 | ||
1405 | if (DoC_is_MillenniumPlus(doc)) { | |
1406 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1407 | if (inftl_bbt_write) | |
1408 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1409 | this->bbt_td->pages[0] = 2; | |
1410 | this->bbt_md = NULL; | |
1411 | } else { | |
e0c7d767 | 1412 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1413 | if (inftl_bbt_write) |
1414 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1415 | this->bbt_td->offs = 8; | |
1416 | this->bbt_td->len = 8; | |
1417 | this->bbt_td->veroffs = 7; | |
1418 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1419 | this->bbt_td->reserved_block_code = 0x01; | |
1420 | this->bbt_td->pattern = "MSYS_BBT"; | |
1421 | ||
e0c7d767 | 1422 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1423 | if (inftl_bbt_write) |
1424 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1425 | this->bbt_md->offs = 8; | |
1426 | this->bbt_md->len = 8; | |
1427 | this->bbt_md->veroffs = 7; | |
1428 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1429 | this->bbt_md->reserved_block_code = 0x01; | |
1430 | this->bbt_md->pattern = "TBB_SYSM"; | |
1431 | } | |
1432 | ||
1433 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1434 | At least as nand_bbt.c is currently written. */ | |
1435 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1436 | return ret; | |
e0c7d767 | 1437 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1438 | numparts = inftl_partscan(mtd, parts); |
1439 | /* At least for now, require the INFTL Media Header. We could probably | |
1440 | do without it for non-INFTL use, since all it gives us is | |
1441 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1442 | if (!numparts) |
1443 | return -EIO; | |
1da177e4 LT |
1444 | add_mtd_device(mtd); |
1445 | #ifdef CONFIG_MTD_PARTITIONS | |
1446 | if (!no_autopart) | |
1447 | add_mtd_partitions(mtd, parts, numparts); | |
1448 | #endif | |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1453 | { | |
1454 | struct nand_chip *this = mtd->priv; | |
1455 | struct doc_priv *doc = this->priv; | |
1456 | ||
1457 | this->write_byte = doc2000_write_byte; | |
1458 | this->read_byte = doc2000_read_byte; | |
1459 | this->write_buf = doc2000_writebuf; | |
1460 | this->read_buf = doc2000_readbuf; | |
1461 | this->verify_buf = doc2000_verifybuf; | |
1462 | this->scan_bbt = nftl_scan_bbt; | |
1463 | ||
1464 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1465 | doc2000_count_chips(mtd); | |
1466 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1467 | return (4 * doc->chips_per_floor); | |
1468 | } | |
1469 | ||
1470 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1471 | { | |
1472 | struct nand_chip *this = mtd->priv; | |
1473 | struct doc_priv *doc = this->priv; | |
1474 | ||
1475 | this->write_byte = doc2001_write_byte; | |
1476 | this->read_byte = doc2001_read_byte; | |
1477 | this->write_buf = doc2001_writebuf; | |
1478 | this->read_buf = doc2001_readbuf; | |
1479 | this->verify_buf = doc2001_verifybuf; | |
1480 | ||
1481 | ReadDOC(doc->virtadr, ChipID); | |
1482 | ReadDOC(doc->virtadr, ChipID); | |
1483 | ReadDOC(doc->virtadr, ChipID); | |
1484 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1485 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1486 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1487 | Treat it like a Millennium, except that it |
1488 | can have multiple chips. */ | |
1489 | doc2000_count_chips(mtd); | |
1490 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1491 | this->scan_bbt = inftl_scan_bbt; | |
1492 | return (4 * doc->chips_per_floor); | |
1493 | } else { | |
1494 | /* Bog-standard Millennium */ | |
1495 | doc->chips_per_floor = 1; | |
1496 | mtd->name = "DiskOnChip Millennium"; | |
1497 | this->scan_bbt = nftl_scan_bbt; | |
1498 | return 1; | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1503 | { | |
1504 | struct nand_chip *this = mtd->priv; | |
1505 | struct doc_priv *doc = this->priv; | |
1506 | ||
1507 | this->write_byte = NULL; | |
1508 | this->read_byte = doc2001plus_read_byte; | |
1509 | this->write_buf = doc2001plus_writebuf; | |
1510 | this->read_buf = doc2001plus_readbuf; | |
1511 | this->verify_buf = doc2001plus_verifybuf; | |
1512 | this->scan_bbt = inftl_scan_bbt; | |
1513 | this->hwcontrol = NULL; | |
1514 | this->select_chip = doc2001plus_select_chip; | |
1515 | this->cmdfunc = doc2001plus_command; | |
1516 | this->enable_hwecc = doc2001plus_enable_hwecc; | |
1517 | ||
1518 | doc->chips_per_floor = 1; | |
1519 | mtd->name = "DiskOnChip Millennium Plus"; | |
1520 | ||
1521 | return 1; | |
1522 | } | |
1523 | ||
858119e1 | 1524 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1525 | { |
1526 | unsigned char ChipID; | |
1527 | struct mtd_info *mtd; | |
1528 | struct nand_chip *nand; | |
1529 | struct doc_priv *doc; | |
1530 | void __iomem *virtadr; | |
1531 | unsigned char save_control; | |
1532 | unsigned char tmp, tmpb, tmpc; | |
1533 | int reg, len, numchips; | |
1534 | int ret = 0; | |
1535 | ||
1536 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1537 | if (!virtadr) { | |
1538 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1539 | return -EIO; | |
1540 | } | |
1541 | ||
1542 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1543 | * bootup procedure will put the device into reset mode, and | |
1544 | * it's not possible to talk to it without actually writing | |
1545 | * to the DOCControl register. So we store the current contents | |
1546 | * of the DOCControl register's location, in case we later decide | |
1547 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1548 | * found it. |
1da177e4 LT |
1549 | */ |
1550 | save_control = ReadDOC(virtadr, DOCControl); | |
1551 | ||
1552 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1553 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1554 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1555 | |
1556 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1557 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1558 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1559 | |
1560 | ChipID = ReadDOC(virtadr, ChipID); | |
1561 | ||
e0c7d767 | 1562 | switch (ChipID) { |
1da177e4 LT |
1563 | case DOC_ChipID_Doc2k: |
1564 | reg = DoC_2k_ECCStatus; | |
1565 | break; | |
1566 | case DOC_ChipID_DocMil: | |
1567 | reg = DoC_ECCConf; | |
1568 | break; | |
1569 | case DOC_ChipID_DocMilPlus16: | |
1570 | case DOC_ChipID_DocMilPlus32: | |
1571 | case 0: | |
1572 | /* Possible Millennium Plus, need to do more checks */ | |
1573 | /* Possibly release from power down mode */ | |
1574 | for (tmp = 0; (tmp < 4); tmp++) | |
1575 | ReadDOC(virtadr, Mplus_Power); | |
1576 | ||
1577 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1578 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1579 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1580 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1581 | ||
1582 | mdelay(1); | |
1583 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1584 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1585 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1586 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1587 | mdelay(1); | |
1588 | ||
1589 | ChipID = ReadDOC(virtadr, ChipID); | |
1590 | ||
1591 | switch (ChipID) { | |
1592 | case DOC_ChipID_DocMilPlus16: | |
1593 | reg = DoC_Mplus_Toggle; | |
1594 | break; | |
1595 | case DOC_ChipID_DocMilPlus32: | |
1596 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1597 | default: | |
1598 | ret = -ENODEV; | |
1599 | goto notfound; | |
1600 | } | |
1601 | break; | |
1602 | ||
1603 | default: | |
1604 | ret = -ENODEV; | |
1605 | goto notfound; | |
1606 | } | |
1607 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1608 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1609 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1610 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1611 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1612 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1613 | ret = -ENODEV; | |
1614 | goto notfound; | |
1615 | } | |
1616 | ||
1617 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1618 | unsigned char oldval; | |
1619 | unsigned char newval; | |
1620 | nand = mtd->priv; | |
1621 | doc = nand->priv; | |
1622 | /* Use the alias resolution register to determine if this is | |
1623 | in fact the same DOC aliased to a new address. If writes | |
1624 | to one chip's alias resolution register change the value on | |
1625 | the other chip, they're the same chip. */ | |
1626 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1627 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1628 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1629 | } else { | |
1630 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1631 | newval = ReadDOC(virtadr, AliasResolution); | |
1632 | } | |
1633 | if (oldval != newval) | |
1634 | continue; | |
1635 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1636 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1637 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1638 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1639 | } else { |
1640 | WriteDOC(~newval, virtadr, AliasResolution); | |
1641 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1642 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1643 | } |
1644 | newval = ~newval; | |
1645 | if (oldval == newval) { | |
1646 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1647 | goto notfound; | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1652 | ||
1653 | len = sizeof(struct mtd_info) + | |
e0c7d767 DW |
1654 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
1655 | mtd = kmalloc(len, GFP_KERNEL); | |
1da177e4 LT |
1656 | if (!mtd) { |
1657 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1658 | ret = -ENOMEM; | |
1659 | goto fail; | |
1660 | } | |
1661 | memset(mtd, 0, len); | |
1662 | ||
1663 | nand = (struct nand_chip *) (mtd + 1); | |
1664 | doc = (struct doc_priv *) (nand + 1); | |
1665 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1666 | nand->bbt_md = nand->bbt_td + 1; | |
1667 | ||
1668 | mtd->priv = nand; | |
1669 | mtd->owner = THIS_MODULE; | |
1670 | ||
1671 | nand->priv = doc; | |
1672 | nand->select_chip = doc200x_select_chip; | |
1673 | nand->hwcontrol = doc200x_hwcontrol; | |
1674 | nand->dev_ready = doc200x_dev_ready; | |
1675 | nand->waitfunc = doc200x_wait; | |
1676 | nand->block_bad = doc200x_block_bad; | |
1677 | nand->enable_hwecc = doc200x_enable_hwecc; | |
1678 | nand->calculate_ecc = doc200x_calculate_ecc; | |
1679 | nand->correct_data = doc200x_correct_data; | |
1680 | ||
1681 | nand->autooob = &doc200x_oobinfo; | |
1682 | nand->eccmode = NAND_ECC_HW6_512; | |
1683 | nand->options = NAND_USE_FLASH_BBT | NAND_HWECC_SYNDROME; | |
1684 | ||
1685 | doc->physadr = physadr; | |
1686 | doc->virtadr = virtadr; | |
1687 | doc->ChipID = ChipID; | |
1688 | doc->curfloor = -1; | |
1689 | doc->curchip = -1; | |
1690 | doc->mh0_page = -1; | |
1691 | doc->mh1_page = -1; | |
1692 | doc->nextdoc = doclist; | |
1693 | ||
1694 | if (ChipID == DOC_ChipID_Doc2k) | |
1695 | numchips = doc2000_init(mtd); | |
1696 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1697 | numchips = doc2001plus_init(mtd); | |
1698 | else | |
1699 | numchips = doc2001_init(mtd); | |
1700 | ||
1701 | if ((ret = nand_scan(mtd, numchips))) { | |
1702 | /* DBB note: i believe nand_release is necessary here, as | |
1703 | buffers may have been allocated in nand_base. Check with | |
1704 | Thomas. FIX ME! */ | |
1705 | /* nand_release will call del_mtd_device, but we haven't yet | |
1706 | added it. This is handled without incident by | |
1707 | del_mtd_device, as far as I can tell. */ | |
1708 | nand_release(mtd); | |
1709 | kfree(mtd); | |
1710 | goto fail; | |
1711 | } | |
1712 | ||
1713 | /* Success! */ | |
1714 | doclist = mtd; | |
1715 | return 0; | |
1716 | ||
e0c7d767 | 1717 | notfound: |
1da177e4 LT |
1718 | /* Put back the contents of the DOCControl register, in case it's not |
1719 | actually a DiskOnChip. */ | |
1720 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1721 | fail: |
1da177e4 LT |
1722 | iounmap(virtadr); |
1723 | return ret; | |
1724 | } | |
1725 | ||
1726 | static void release_nanddoc(void) | |
1727 | { | |
e0c7d767 | 1728 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1729 | struct nand_chip *nand; |
1730 | struct doc_priv *doc; | |
1731 | ||
1732 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1733 | nand = mtd->priv; | |
1734 | doc = nand->priv; | |
1735 | ||
1736 | nextmtd = doc->nextdoc; | |
1737 | nand_release(mtd); | |
1738 | iounmap(doc->virtadr); | |
1739 | kfree(mtd); | |
1740 | } | |
1741 | } | |
1742 | ||
1743 | static int __init init_nanddoc(void) | |
1744 | { | |
1745 | int i, ret = 0; | |
1746 | ||
1747 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1748 | * This way we have it handy, if an error happens |
1da177e4 LT |
1749 | * |
1750 | * Symbolsize is 10 (bits) | |
1751 | * Primitve polynomial is x^10+x^3+1 | |
1752 | * first consecutive root is 510 | |
1753 | * primitve element to generate roots = 1 | |
1754 | * generator polinomial degree = 4 | |
1755 | */ | |
1756 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1757 | if (!rs_decoder) { |
1758 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1759 | return -ENOMEM; |
1760 | } | |
1761 | ||
1762 | if (doc_config_location) { | |
1763 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1764 | ret = doc_probe(doc_config_location); | |
1765 | if (ret < 0) | |
1766 | goto outerr; | |
1767 | } else { | |
e0c7d767 | 1768 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1769 | doc_probe(doc_locations[i]); |
1770 | } | |
1771 | } | |
1772 | /* No banner message any more. Print a message if no DiskOnChip | |
1773 | found, so the user knows we at least tried. */ | |
1774 | if (!doclist) { | |
1775 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1776 | ret = -ENODEV; | |
1777 | goto outerr; | |
1778 | } | |
1779 | return 0; | |
e0c7d767 | 1780 | outerr: |
1da177e4 LT |
1781 | free_rs(rs_decoder); |
1782 | return ret; | |
1783 | } | |
1784 | ||
1785 | static void __exit cleanup_nanddoc(void) | |
1786 | { | |
1787 | /* Cleanup the nand/DoC resources */ | |
1788 | release_nanddoc(); | |
1789 | ||
1790 | /* Free the reed solomon resources */ | |
1791 | if (rs_decoder) { | |
1792 | free_rs(rs_decoder); | |
1793 | } | |
1794 | } | |
1795 | ||
1796 | module_init(init_nanddoc); | |
1797 | module_exit(cleanup_nanddoc); | |
1798 | ||
1799 | MODULE_LICENSE("GPL"); | |
1800 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
1801 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver\n"); |