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Commit | Line | Data |
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61b03bd7 | 1 | /* |
1da177e4 LT |
2 | * drivers/mtd/nand/diskonchip.c |
3 | * | |
4 | * (C) 2003 Red Hat, Inc. | |
5 | * (C) 2004 Dan Brown <dan_brown@ieee.org> | |
6 | * (C) 2004 Kalev Lember <kalev@smartlink.ee> | |
7 | * | |
8 | * Author: David Woodhouse <dwmw2@infradead.org> | |
9 | * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org> | |
10 | * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee> | |
61b03bd7 | 11 | * |
1da177e4 | 12 | * Error correction code lifted from the old docecc code |
61b03bd7 | 13 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) |
1da177e4 LT |
14 | * Copyright (C) 2000 Netgem S.A. |
15 | * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de> | |
61b03bd7 | 16 | * |
1da177e4 | 17 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
1da177e4 LT |
18 | */ |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/rslib.h> | |
25 | #include <linux/moduleparam.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <asm/io.h> |
28 | ||
29 | #include <linux/mtd/mtd.h> | |
30 | #include <linux/mtd/nand.h> | |
31 | #include <linux/mtd/doc2000.h> | |
1da177e4 LT |
32 | #include <linux/mtd/partitions.h> |
33 | #include <linux/mtd/inftl.h> | |
a0e5cc58 | 34 | #include <linux/module.h> |
1da177e4 LT |
35 | |
36 | /* Where to look for the devices? */ | |
651078ba TG |
37 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
38 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
1da177e4 LT |
39 | #endif |
40 | ||
41 | static unsigned long __initdata doc_locations[] = { | |
42 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) | |
651078ba | 43 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
61b03bd7 | 44 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
1da177e4 | 45 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
61b03bd7 TG |
46 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
47 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
1da177e4 LT |
48 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
49 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ | |
61b03bd7 | 50 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
1da177e4 | 51 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
61b03bd7 TG |
52 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
53 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
1da177e4 LT |
54 | 0xe8000, 0xea000, 0xec000, 0xee000, |
55 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ | |
e0c7d767 | 56 | #else |
1da177e4 LT |
57 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
58 | #endif | |
59 | 0xffffffff }; | |
60 | ||
61 | static struct mtd_info *doclist = NULL; | |
62 | ||
63 | struct doc_priv { | |
64 | void __iomem *virtadr; | |
65 | unsigned long physadr; | |
66 | u_char ChipID; | |
67 | u_char CDSNControl; | |
e0c7d767 | 68 | int chips_per_floor; /* The number of chips detected on each floor */ |
1da177e4 LT |
69 | int curfloor; |
70 | int curchip; | |
71 | int mh0_page; | |
72 | int mh1_page; | |
73 | struct mtd_info *nextdoc; | |
74 | }; | |
75 | ||
1da177e4 LT |
76 | /* This is the syndrome computed by the HW ecc generator upon reading an empty |
77 | page, one with all 0xff for data and stored ecc code. */ | |
78 | static u_char empty_read_syndrome[6] = { 0x26, 0xff, 0x6d, 0x47, 0x73, 0x7a }; | |
e0c7d767 | 79 | |
1da177e4 LT |
80 | /* This is the ecc value computed by the HW ecc generator upon writing an empty |
81 | page, one with all 0xff for data. */ | |
82 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
83 | ||
84 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
85 | ||
86 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
87 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
88 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
89 | ||
7abd3ef9 TG |
90 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, |
91 | unsigned int bitmask); | |
1da177e4 LT |
92 | static void doc200x_select_chip(struct mtd_info *mtd, int chip); |
93 | ||
e0c7d767 | 94 | static int debug = 0; |
1da177e4 LT |
95 | module_param(debug, int, 0); |
96 | ||
e0c7d767 | 97 | static int try_dword = 1; |
1da177e4 LT |
98 | module_param(try_dword, int, 0); |
99 | ||
e0c7d767 | 100 | static int no_ecc_failures = 0; |
1da177e4 LT |
101 | module_param(no_ecc_failures, int, 0); |
102 | ||
e0c7d767 | 103 | static int no_autopart = 0; |
1da177e4 | 104 | module_param(no_autopart, int, 0); |
1a78ff6b | 105 | |
e0c7d767 | 106 | static int show_firmware_partition = 0; |
1a78ff6b | 107 | module_param(show_firmware_partition, int, 0); |
1da177e4 | 108 | |
89e2bf61 | 109 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE |
e0c7d767 | 110 | static int inftl_bbt_write = 1; |
1da177e4 | 111 | #else |
e0c7d767 | 112 | static int inftl_bbt_write = 0; |
1da177e4 LT |
113 | #endif |
114 | module_param(inftl_bbt_write, int, 0); | |
115 | ||
651078ba | 116 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
117 | module_param(doc_config_location, ulong, 0); |
118 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
119 | ||
1da177e4 LT |
120 | /* Sector size for HW ECC */ |
121 | #define SECTOR_SIZE 512 | |
122 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
123 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
124 | /* Number of roots */ | |
125 | #define NROOTS 4 | |
126 | /* First consective root */ | |
127 | #define FCR 510 | |
128 | /* Number of symbols */ | |
129 | #define NN 1023 | |
130 | ||
131 | /* the Reed Solomon control structure */ | |
132 | static struct rs_control *rs_decoder; | |
133 | ||
61b03bd7 | 134 | /* |
1da177e4 | 135 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
7854d3f7 | 136 | * which we must convert to a standard syndrome usable by the generic |
1da177e4 LT |
137 | * Reed-Solomon library code. |
138 | * | |
139 | * Fabrice Bellard figured this out in the old docecc code. I added | |
140 | * some comments, improved a minor bit and converted it to make use | |
25985edc | 141 | * of the generic Reed-Solomon library. tglx |
1da177e4 | 142 | */ |
e0c7d767 | 143 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
144 | { |
145 | int i, j, nerr, errpos[8]; | |
146 | uint8_t parity; | |
147 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
148 | ||
c9fb6773 | 149 | memset(syn, 0, sizeof(syn)); |
1da177e4 LT |
150 | /* Convert the ecc bytes into words */ |
151 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
152 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
153 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
154 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
155 | parity = ecc[1]; | |
156 | ||
7854d3f7 | 157 | /* Initialize the syndrome buffer */ |
1da177e4 LT |
158 | for (i = 0; i < NROOTS; i++) |
159 | s[i] = ds[0]; | |
61b03bd7 TG |
160 | /* |
161 | * Evaluate | |
1da177e4 LT |
162 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
163 | * where x = alpha^(FCR + i) | |
164 | */ | |
e0c7d767 DW |
165 | for (j = 1; j < NROOTS; j++) { |
166 | if (ds[j] == 0) | |
1da177e4 LT |
167 | continue; |
168 | tmp = rs->index_of[ds[j]]; | |
e0c7d767 | 169 | for (i = 0; i < NROOTS; i++) |
1da177e4 LT |
170 | s[i] ^= rs->alpha_to[rs_modnn(rs, tmp + (FCR + i) * j)]; |
171 | } | |
172 | ||
c9fb6773 | 173 | /* Calc syn[i] = s[i] / alpha^(v + i) */ |
1da177e4 | 174 | for (i = 0; i < NROOTS; i++) { |
c9fb6773 | 175 | if (s[i]) |
e0c7d767 | 176 | syn[i] = rs_modnn(rs, rs->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
177 | } |
178 | /* Call the decoder library */ | |
179 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
180 | ||
181 | /* Incorrectable errors ? */ | |
182 | if (nerr < 0) | |
183 | return nerr; | |
184 | ||
61b03bd7 | 185 | /* |
1da177e4 LT |
186 | * Correct the errors. The bitpositions are a bit of magic, |
187 | * but they are given by the design of the de/encoder circuit | |
188 | * in the DoC ASIC's. | |
189 | */ | |
e0c7d767 | 190 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
191 | int index, bitpos, pos = 1015 - errpos[i]; |
192 | uint8_t val; | |
193 | if (pos >= NB_DATA && pos < 1019) | |
194 | continue; | |
195 | if (pos < NB_DATA) { | |
196 | /* extract bit position (MSB first) */ | |
197 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
198 | /* now correct the following 10 bits. At most two bytes | |
199 | can be modified since pos is even */ | |
200 | index = (pos >> 3) ^ 1; | |
201 | bitpos = pos & 7; | |
e0c7d767 | 202 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
203 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
204 | parity ^= val; | |
205 | if (index < SECTOR_SIZE) | |
206 | data[index] ^= val; | |
207 | } | |
208 | index = ((pos >> 3) + 1) ^ 1; | |
209 | bitpos = (bitpos + 10) & 7; | |
210 | if (bitpos == 0) | |
211 | bitpos = 8; | |
e0c7d767 DW |
212 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
213 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
214 | parity ^= val; |
215 | if (index < SECTOR_SIZE) | |
216 | data[index] ^= val; | |
217 | } | |
218 | } | |
219 | } | |
220 | /* If the parity is wrong, no rescue possible */ | |
eb684507 | 221 | return parity ? -EBADMSG : nerr; |
1da177e4 LT |
222 | } |
223 | ||
224 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
225 | { | |
226 | volatile char dummy; | |
227 | int i; | |
61b03bd7 | 228 | |
1da177e4 LT |
229 | for (i = 0; i < cycles; i++) { |
230 | if (DoC_is_Millennium(doc)) | |
231 | dummy = ReadDOC(doc->virtadr, NOP); | |
232 | else if (DoC_is_MillenniumPlus(doc)) | |
233 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
234 | else | |
235 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
236 | } | |
61b03bd7 | 237 | |
1da177e4 LT |
238 | } |
239 | ||
240 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
241 | ||
242 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
243 | static int _DoC_WaitReady(struct doc_priv *doc) | |
244 | { | |
e0c7d767 | 245 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
246 | unsigned long timeo = jiffies + (HZ * 10); |
247 | ||
e0c7d767 DW |
248 | if (debug) |
249 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
250 | /* Out-of-line routine to wait for chip response */ |
251 | if (DoC_is_MillenniumPlus(doc)) { | |
252 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
253 | if (time_after(jiffies, timeo)) { | |
254 | printk("_DoC_WaitReady timed out.\n"); | |
255 | return -EIO; | |
256 | } | |
257 | udelay(1); | |
258 | cond_resched(); | |
259 | } | |
260 | } else { | |
261 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
262 | if (time_after(jiffies, timeo)) { | |
263 | printk("_DoC_WaitReady timed out.\n"); | |
264 | return -EIO; | |
265 | } | |
266 | udelay(1); | |
267 | cond_resched(); | |
268 | } | |
269 | } | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
275 | { | |
e0c7d767 | 276 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
277 | int ret = 0; |
278 | ||
279 | if (DoC_is_MillenniumPlus(doc)) { | |
280 | DoC_Delay(doc, 4); | |
281 | ||
282 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
283 | /* Call the out-of-line routine to wait */ | |
284 | ret = _DoC_WaitReady(doc); | |
285 | } else { | |
286 | DoC_Delay(doc, 4); | |
287 | ||
288 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
289 | /* Call the out-of-line routine to wait */ | |
290 | ret = _DoC_WaitReady(doc); | |
291 | DoC_Delay(doc, 2); | |
292 | } | |
293 | ||
e0c7d767 DW |
294 | if (debug) |
295 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
296 | return ret; |
297 | } | |
298 | ||
299 | static void doc2000_write_byte(struct mtd_info *mtd, u_char datum) | |
300 | { | |
301 | struct nand_chip *this = mtd->priv; | |
302 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 303 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 304 | |
e0c7d767 DW |
305 | if (debug) |
306 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
307 | WriteDOC(datum, docptr, CDSNSlowIO); |
308 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
309 | } | |
310 | ||
311 | static u_char doc2000_read_byte(struct mtd_info *mtd) | |
312 | { | |
313 | struct nand_chip *this = mtd->priv; | |
314 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 315 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
316 | u_char ret; |
317 | ||
318 | ReadDOC(docptr, CDSNSlowIO); | |
319 | DoC_Delay(doc, 2); | |
320 | ret = ReadDOC(docptr, 2k_CDSN_IO); | |
e0c7d767 DW |
321 | if (debug) |
322 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
323 | return ret; |
324 | } | |
325 | ||
e0c7d767 | 326 | static void doc2000_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
327 | { |
328 | struct nand_chip *this = mtd->priv; | |
329 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 330 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 331 | int i; |
e0c7d767 DW |
332 | if (debug) |
333 | printk("writebuf of %d bytes: ", len); | |
334 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
335 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
336 | if (debug && i < 16) | |
337 | printk("%02x ", buf[i]); | |
338 | } | |
e0c7d767 DW |
339 | if (debug) |
340 | printk("\n"); | |
1da177e4 LT |
341 | } |
342 | ||
e0c7d767 | 343 | static void doc2000_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
344 | { |
345 | struct nand_chip *this = mtd->priv; | |
346 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
347 | void __iomem *docptr = doc->virtadr; |
348 | int i; | |
1da177e4 | 349 | |
e0c7d767 DW |
350 | if (debug) |
351 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 352 | |
e0c7d767 | 353 | for (i = 0; i < len; i++) { |
1da177e4 LT |
354 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); |
355 | } | |
356 | } | |
357 | ||
e0c7d767 | 358 | static void doc2000_readbuf_dword(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
359 | { |
360 | struct nand_chip *this = mtd->priv; | |
361 | struct doc_priv *doc = this->priv; | |
e0c7d767 DW |
362 | void __iomem *docptr = doc->virtadr; |
363 | int i; | |
1da177e4 | 364 | |
e0c7d767 DW |
365 | if (debug) |
366 | printk("readbuf_dword of %d bytes: ", len); | |
1da177e4 | 367 | |
e0c7d767 DW |
368 | if (unlikely((((unsigned long)buf) | len) & 3)) { |
369 | for (i = 0; i < len; i++) { | |
370 | *(uint8_t *) (&buf[i]) = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 LT |
371 | } |
372 | } else { | |
e0c7d767 DW |
373 | for (i = 0; i < len; i += 4) { |
374 | *(uint32_t *) (&buf[i]) = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
375 | } |
376 | } | |
377 | } | |
378 | ||
e0c7d767 | 379 | static int doc2000_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
380 | { |
381 | struct nand_chip *this = mtd->priv; | |
382 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 383 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
384 | int i; |
385 | ||
e0c7d767 | 386 | for (i = 0; i < len; i++) |
1da177e4 LT |
387 | if (buf[i] != ReadDOC(docptr, 2k_CDSN_IO)) |
388 | return -EFAULT; | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) | |
393 | { | |
394 | struct nand_chip *this = mtd->priv; | |
395 | struct doc_priv *doc = this->priv; | |
396 | uint16_t ret; | |
397 | ||
398 | doc200x_select_chip(mtd, nr); | |
7abd3ef9 TG |
399 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
400 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
401 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
402 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
61b03bd7 | 403 | |
e9c54999 | 404 | /* We can't use dev_ready here, but at least we wait for the |
61b03bd7 | 405 | * command to complete |
dfd61294 TG |
406 | */ |
407 | udelay(50); | |
61b03bd7 | 408 | |
1da177e4 LT |
409 | ret = this->read_byte(mtd) << 8; |
410 | ret |= this->read_byte(mtd); | |
411 | ||
412 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
413 | /* First chip probe. See if we get same results by 32-bit access */ | |
414 | union { | |
415 | uint32_t dword; | |
416 | uint8_t byte[4]; | |
417 | } ident; | |
418 | void __iomem *docptr = doc->virtadr; | |
419 | ||
7abd3ef9 TG |
420 | doc200x_hwcontrol(mtd, NAND_CMD_READID, |
421 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); | |
422 | doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE); | |
423 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, | |
424 | NAND_NCE | NAND_CTRL_CHANGE); | |
1da177e4 | 425 | |
dfd61294 TG |
426 | udelay(50); |
427 | ||
1da177e4 LT |
428 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
429 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
430 | printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n"); | |
431 | this->read_buf = &doc2000_readbuf_dword; | |
432 | } | |
433 | } | |
61b03bd7 | 434 | |
1da177e4 LT |
435 | return ret; |
436 | } | |
437 | ||
438 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
439 | { | |
440 | struct nand_chip *this = mtd->priv; | |
441 | struct doc_priv *doc = this->priv; | |
442 | uint16_t mfrid; | |
443 | int i; | |
444 | ||
445 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
446 | doc->chips_per_floor = 4; | |
447 | ||
448 | /* Find out what the first chip is */ | |
449 | mfrid = doc200x_ident_chip(mtd, 0); | |
450 | ||
451 | /* Find how many chips in each floor. */ | |
452 | for (i = 1; i < 4; i++) { | |
453 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
454 | break; | |
455 | } | |
456 | doc->chips_per_floor = i; | |
457 | printk(KERN_DEBUG "Detected %d chips per floor.\n", i); | |
458 | } | |
459 | ||
7bc3312b | 460 | static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) |
1da177e4 LT |
461 | { |
462 | struct doc_priv *doc = this->priv; | |
463 | ||
464 | int status; | |
61b03bd7 | 465 | |
1da177e4 LT |
466 | DoC_WaitReady(doc); |
467 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); | |
468 | DoC_WaitReady(doc); | |
469 | status = (int)this->read_byte(mtd); | |
470 | ||
471 | return status; | |
472 | } | |
473 | ||
474 | static void doc2001_write_byte(struct mtd_info *mtd, u_char datum) | |
475 | { | |
476 | struct nand_chip *this = mtd->priv; | |
477 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 478 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
479 | |
480 | WriteDOC(datum, docptr, CDSNSlowIO); | |
481 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
482 | WriteDOC(datum, docptr, WritePipeTerm); | |
483 | } | |
484 | ||
485 | static u_char doc2001_read_byte(struct mtd_info *mtd) | |
486 | { | |
487 | struct nand_chip *this = mtd->priv; | |
488 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 489 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
490 | |
491 | //ReadDOC(docptr, CDSNSlowIO); | |
492 | /* 11.4.5 -- delay twice to allow extended length cycle */ | |
493 | DoC_Delay(doc, 2); | |
494 | ReadDOC(docptr, ReadPipeInit); | |
495 | //return ReadDOC(docptr, Mil_CDSN_IO); | |
496 | return ReadDOC(docptr, LastDataRead); | |
497 | } | |
498 | ||
e0c7d767 | 499 | static void doc2001_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
500 | { |
501 | struct nand_chip *this = mtd->priv; | |
502 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 503 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
504 | int i; |
505 | ||
e0c7d767 | 506 | for (i = 0; i < len; i++) |
1da177e4 LT |
507 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
508 | /* Terminate write pipeline */ | |
509 | WriteDOC(0x00, docptr, WritePipeTerm); | |
510 | } | |
511 | ||
e0c7d767 | 512 | static void doc2001_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
513 | { |
514 | struct nand_chip *this = mtd->priv; | |
515 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 516 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
517 | int i; |
518 | ||
519 | /* Start read pipeline */ | |
520 | ReadDOC(docptr, ReadPipeInit); | |
521 | ||
e0c7d767 | 522 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
523 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
524 | ||
525 | /* Terminate read pipeline */ | |
526 | buf[i] = ReadDOC(docptr, LastDataRead); | |
527 | } | |
528 | ||
e0c7d767 | 529 | static int doc2001_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
530 | { |
531 | struct nand_chip *this = mtd->priv; | |
532 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 533 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
534 | int i; |
535 | ||
536 | /* Start read pipeline */ | |
537 | ReadDOC(docptr, ReadPipeInit); | |
538 | ||
e0c7d767 | 539 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
540 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
541 | ReadDOC(docptr, LastDataRead); | |
542 | return i; | |
543 | } | |
544 | if (buf[i] != ReadDOC(docptr, LastDataRead)) | |
545 | return i; | |
546 | return 0; | |
547 | } | |
548 | ||
549 | static u_char doc2001plus_read_byte(struct mtd_info *mtd) | |
550 | { | |
551 | struct nand_chip *this = mtd->priv; | |
552 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 553 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
554 | u_char ret; |
555 | ||
e0c7d767 DW |
556 | ReadDOC(docptr, Mplus_ReadPipeInit); |
557 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
558 | ret = ReadDOC(docptr, Mplus_LastDataRead); | |
559 | if (debug) | |
560 | printk("read_byte returns %02x\n", ret); | |
1da177e4 LT |
561 | return ret; |
562 | } | |
563 | ||
e0c7d767 | 564 | static void doc2001plus_writebuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
565 | { |
566 | struct nand_chip *this = mtd->priv; | |
567 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 568 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
569 | int i; |
570 | ||
e0c7d767 DW |
571 | if (debug) |
572 | printk("writebuf of %d bytes: ", len); | |
573 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
574 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
575 | if (debug && i < 16) | |
576 | printk("%02x ", buf[i]); | |
577 | } | |
e0c7d767 DW |
578 | if (debug) |
579 | printk("\n"); | |
1da177e4 LT |
580 | } |
581 | ||
e0c7d767 | 582 | static void doc2001plus_readbuf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 LT |
583 | { |
584 | struct nand_chip *this = mtd->priv; | |
585 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 586 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
587 | int i; |
588 | ||
e0c7d767 DW |
589 | if (debug) |
590 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
591 | |
592 | /* Start read pipeline */ | |
593 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
594 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
595 | ||
e0c7d767 | 596 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
597 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
598 | if (debug && i < 16) | |
599 | printk("%02x ", buf[i]); | |
600 | } | |
601 | ||
602 | /* Terminate read pipeline */ | |
e0c7d767 | 603 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 604 | if (debug && i < 16) |
e0c7d767 DW |
605 | printk("%02x ", buf[len - 2]); |
606 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); | |
1da177e4 | 607 | if (debug && i < 16) |
e0c7d767 DW |
608 | printk("%02x ", buf[len - 1]); |
609 | if (debug) | |
610 | printk("\n"); | |
1da177e4 LT |
611 | } |
612 | ||
e0c7d767 | 613 | static int doc2001plus_verifybuf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
614 | { |
615 | struct nand_chip *this = mtd->priv; | |
616 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 617 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
618 | int i; |
619 | ||
e0c7d767 DW |
620 | if (debug) |
621 | printk("verifybuf of %d bytes: ", len); | |
1da177e4 LT |
622 | |
623 | /* Start read pipeline */ | |
624 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
625 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
626 | ||
e0c7d767 | 627 | for (i = 0; i < len - 2; i++) |
1da177e4 LT |
628 | if (buf[i] != ReadDOC(docptr, Mil_CDSN_IO)) { |
629 | ReadDOC(docptr, Mplus_LastDataRead); | |
630 | ReadDOC(docptr, Mplus_LastDataRead); | |
631 | return i; | |
632 | } | |
e0c7d767 DW |
633 | if (buf[len - 2] != ReadDOC(docptr, Mplus_LastDataRead)) |
634 | return len - 2; | |
635 | if (buf[len - 1] != ReadDOC(docptr, Mplus_LastDataRead)) | |
636 | return len - 1; | |
1da177e4 LT |
637 | return 0; |
638 | } | |
639 | ||
640 | static void doc2001plus_select_chip(struct mtd_info *mtd, int chip) | |
641 | { | |
642 | struct nand_chip *this = mtd->priv; | |
643 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 644 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
645 | int floor = 0; |
646 | ||
e0c7d767 DW |
647 | if (debug) |
648 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
649 | |
650 | if (chip == -1) { | |
651 | /* Disable flash internally */ | |
652 | WriteDOC(0, docptr, Mplus_FlashSelect); | |
653 | return; | |
654 | } | |
655 | ||
656 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 657 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
658 | |
659 | /* Assert ChipEnable and deassert WriteProtect */ | |
660 | WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect); | |
661 | this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); | |
662 | ||
663 | doc->curchip = chip; | |
664 | doc->curfloor = floor; | |
665 | } | |
666 | ||
667 | static void doc200x_select_chip(struct mtd_info *mtd, int chip) | |
668 | { | |
669 | struct nand_chip *this = mtd->priv; | |
670 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 671 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
672 | int floor = 0; |
673 | ||
e0c7d767 DW |
674 | if (debug) |
675 | printk("select chip (%d)\n", chip); | |
1da177e4 LT |
676 | |
677 | if (chip == -1) | |
678 | return; | |
679 | ||
680 | floor = chip / doc->chips_per_floor; | |
e0c7d767 | 681 | chip -= (floor * doc->chips_per_floor); |
1da177e4 LT |
682 | |
683 | /* 11.4.4 -- deassert CE before changing chip */ | |
7abd3ef9 | 684 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
1da177e4 LT |
685 | |
686 | WriteDOC(floor, docptr, FloorSelect); | |
687 | WriteDOC(chip, docptr, CDSNDeviceSelect); | |
688 | ||
7abd3ef9 | 689 | doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
1da177e4 LT |
690 | |
691 | doc->curchip = chip; | |
692 | doc->curfloor = floor; | |
693 | } | |
694 | ||
7abd3ef9 TG |
695 | #define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE) |
696 | ||
697 | static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd, | |
698 | unsigned int ctrl) | |
1da177e4 LT |
699 | { |
700 | struct nand_chip *this = mtd->priv; | |
701 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 702 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 703 | |
7abd3ef9 TG |
704 | if (ctrl & NAND_CTRL_CHANGE) { |
705 | doc->CDSNControl &= ~CDSN_CTRL_MSK; | |
706 | doc->CDSNControl |= ctrl & CDSN_CTRL_MSK; | |
707 | if (debug) | |
708 | printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl); | |
709 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
710 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
711 | DoC_Delay(doc, 4); | |
1da177e4 | 712 | } |
cad74f2c TG |
713 | if (cmd != NAND_CMD_NONE) { |
714 | if (DoC_is_2000(doc)) | |
715 | doc2000_write_byte(mtd, cmd); | |
716 | else | |
717 | doc2001_write_byte(mtd, cmd); | |
718 | } | |
1da177e4 LT |
719 | } |
720 | ||
e0c7d767 | 721 | static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) |
1da177e4 LT |
722 | { |
723 | struct nand_chip *this = mtd->priv; | |
724 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 725 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
726 | |
727 | /* | |
728 | * Must terminate write pipeline before sending any commands | |
729 | * to the device. | |
730 | */ | |
731 | if (command == NAND_CMD_PAGEPROG) { | |
732 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
733 | WriteDOC(0x00, docptr, Mplus_WritePipeTerm); | |
734 | } | |
735 | ||
736 | /* | |
737 | * Write out the command to the device. | |
738 | */ | |
739 | if (command == NAND_CMD_SEQIN) { | |
740 | int readcmd; | |
741 | ||
28318776 | 742 | if (column >= mtd->writesize) { |
1da177e4 | 743 | /* OOB area */ |
28318776 | 744 | column -= mtd->writesize; |
1da177e4 LT |
745 | readcmd = NAND_CMD_READOOB; |
746 | } else if (column < 256) { | |
747 | /* First 256 bytes --> READ0 */ | |
748 | readcmd = NAND_CMD_READ0; | |
749 | } else { | |
750 | column -= 256; | |
751 | readcmd = NAND_CMD_READ1; | |
752 | } | |
753 | WriteDOC(readcmd, docptr, Mplus_FlashCmd); | |
754 | } | |
755 | WriteDOC(command, docptr, Mplus_FlashCmd); | |
756 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
757 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
758 | ||
759 | if (column != -1 || page_addr != -1) { | |
760 | /* Serially input address */ | |
761 | if (column != -1) { | |
762 | /* Adjust columns for 16 bit buswidth */ | |
763 | if (this->options & NAND_BUSWIDTH_16) | |
764 | column >>= 1; | |
765 | WriteDOC(column, docptr, Mplus_FlashAddress); | |
766 | } | |
767 | if (page_addr != -1) { | |
e0c7d767 DW |
768 | WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress); |
769 | WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress); | |
1da177e4 LT |
770 | /* One more address cycle for higher density devices */ |
771 | if (this->chipsize & 0x0c000000) { | |
e0c7d767 | 772 | WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress); |
1da177e4 LT |
773 | printk("high density\n"); |
774 | } | |
775 | } | |
776 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
777 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
778 | /* deassert ALE */ | |
e0c7d767 DW |
779 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || |
780 | command == NAND_CMD_READOOB || command == NAND_CMD_READID) | |
1da177e4 LT |
781 | WriteDOC(0, docptr, Mplus_FlashControl); |
782 | } | |
783 | ||
61b03bd7 | 784 | /* |
1da177e4 LT |
785 | * program and erase have their own busy handlers |
786 | * status and sequential in needs no delay | |
e0c7d767 | 787 | */ |
1da177e4 LT |
788 | switch (command) { |
789 | ||
790 | case NAND_CMD_PAGEPROG: | |
791 | case NAND_CMD_ERASE1: | |
792 | case NAND_CMD_ERASE2: | |
793 | case NAND_CMD_SEQIN: | |
794 | case NAND_CMD_STATUS: | |
795 | return; | |
796 | ||
797 | case NAND_CMD_RESET: | |
798 | if (this->dev_ready) | |
799 | break; | |
800 | udelay(this->chip_delay); | |
801 | WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd); | |
802 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
803 | WriteDOC(0, docptr, Mplus_WritePipeTerm); | |
e0c7d767 | 804 | while (!(this->read_byte(mtd) & 0x40)) ; |
1da177e4 LT |
805 | return; |
806 | ||
e0c7d767 | 807 | /* This applies to read commands */ |
1da177e4 | 808 | default: |
61b03bd7 | 809 | /* |
1da177e4 LT |
810 | * If we don't have access to the busy pin, we apply the given |
811 | * command delay | |
e0c7d767 | 812 | */ |
1da177e4 | 813 | if (!this->dev_ready) { |
e0c7d767 | 814 | udelay(this->chip_delay); |
1da177e4 LT |
815 | return; |
816 | } | |
817 | } | |
818 | ||
819 | /* Apply this short delay always to ensure that we do wait tWB in | |
820 | * any case on any machine. */ | |
e0c7d767 | 821 | ndelay(100); |
1da177e4 | 822 | /* wait until command is processed */ |
e0c7d767 | 823 | while (!this->dev_ready(mtd)) ; |
1da177e4 LT |
824 | } |
825 | ||
826 | static int doc200x_dev_ready(struct mtd_info *mtd) | |
827 | { | |
828 | struct nand_chip *this = mtd->priv; | |
829 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 830 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
831 | |
832 | if (DoC_is_MillenniumPlus(doc)) { | |
833 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
834 | DoC_Delay(doc, 4); | |
835 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
e0c7d767 | 836 | if (debug) |
1da177e4 LT |
837 | printk("not ready\n"); |
838 | return 0; | |
839 | } | |
e0c7d767 DW |
840 | if (debug) |
841 | printk("was ready\n"); | |
1da177e4 LT |
842 | return 1; |
843 | } else { | |
844 | /* 11.4.2 -- must NOP four times before checking FR/B# */ | |
845 | DoC_Delay(doc, 4); | |
846 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
e0c7d767 | 847 | if (debug) |
1da177e4 LT |
848 | printk("not ready\n"); |
849 | return 0; | |
850 | } | |
851 | /* 11.4.2 -- Must NOP twice if it's ready */ | |
852 | DoC_Delay(doc, 2); | |
e0c7d767 DW |
853 | if (debug) |
854 | printk("was ready\n"); | |
1da177e4 LT |
855 | return 1; |
856 | } | |
857 | } | |
858 | ||
859 | static int doc200x_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) | |
860 | { | |
861 | /* This is our last resort if we couldn't find or create a BBT. Just | |
862 | pretend all blocks are good. */ | |
863 | return 0; | |
864 | } | |
865 | ||
866 | static void doc200x_enable_hwecc(struct mtd_info *mtd, int mode) | |
867 | { | |
868 | struct nand_chip *this = mtd->priv; | |
869 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 870 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
871 | |
872 | /* Prime the ECC engine */ | |
e0c7d767 | 873 | switch (mode) { |
1da177e4 LT |
874 | case NAND_ECC_READ: |
875 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
876 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
877 | break; | |
878 | case NAND_ECC_WRITE: | |
879 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
880 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
881 | break; | |
882 | } | |
883 | } | |
884 | ||
885 | static void doc2001plus_enable_hwecc(struct mtd_info *mtd, int mode) | |
886 | { | |
887 | struct nand_chip *this = mtd->priv; | |
888 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 889 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
890 | |
891 | /* Prime the ECC engine */ | |
e0c7d767 | 892 | switch (mode) { |
1da177e4 LT |
893 | case NAND_ECC_READ: |
894 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
895 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
896 | break; | |
897 | case NAND_ECC_WRITE: | |
898 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
899 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
900 | break; | |
901 | } | |
902 | } | |
903 | ||
904 | /* This code is only called on write */ | |
e0c7d767 | 905 | static int doc200x_calculate_ecc(struct mtd_info *mtd, const u_char *dat, unsigned char *ecc_code) |
1da177e4 LT |
906 | { |
907 | struct nand_chip *this = mtd->priv; | |
908 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 909 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
910 | int i; |
911 | int emptymatch = 1; | |
912 | ||
913 | /* flush the pipeline */ | |
914 | if (DoC_is_2000(doc)) { | |
915 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
916 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
917 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
918 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
919 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
920 | } else if (DoC_is_MillenniumPlus(doc)) { | |
921 | WriteDOC(0, docptr, Mplus_NOP); | |
922 | WriteDOC(0, docptr, Mplus_NOP); | |
923 | WriteDOC(0, docptr, Mplus_NOP); | |
924 | } else { | |
925 | WriteDOC(0, docptr, NOP); | |
926 | WriteDOC(0, docptr, NOP); | |
927 | WriteDOC(0, docptr, NOP); | |
928 | } | |
929 | ||
930 | for (i = 0; i < 6; i++) { | |
931 | if (DoC_is_MillenniumPlus(doc)) | |
932 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 933 | else |
1da177e4 LT |
934 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
935 | if (ecc_code[i] != empty_write_ecc[i]) | |
936 | emptymatch = 0; | |
937 | } | |
938 | if (DoC_is_MillenniumPlus(doc)) | |
939 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
940 | else | |
941 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
942 | #if 0 | |
943 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
944 | if (emptymatch) { | |
945 | /* Note: this somewhat expensive test should not be triggered | |
946 | often. It could be optimized away by examining the data in | |
947 | the writebuf routine, and remembering the result. */ | |
948 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
949 | if (dat[i] == 0xff) |
950 | continue; | |
1da177e4 LT |
951 | emptymatch = 0; |
952 | break; | |
953 | } | |
954 | } | |
955 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
956 | Return all-0xff ecc value instead of the computed one, so | |
957 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
958 | if (emptymatch) |
959 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
960 | #endif |
961 | return 0; | |
962 | } | |
963 | ||
f5bbdacc TG |
964 | static int doc200x_correct_data(struct mtd_info *mtd, u_char *dat, |
965 | u_char *read_ecc, u_char *isnull) | |
1da177e4 LT |
966 | { |
967 | int i, ret = 0; | |
968 | struct nand_chip *this = mtd->priv; | |
969 | struct doc_priv *doc = this->priv; | |
e0c7d767 | 970 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 971 | uint8_t calc_ecc[6]; |
1da177e4 LT |
972 | volatile u_char dummy; |
973 | int emptymatch = 1; | |
61b03bd7 | 974 | |
1da177e4 LT |
975 | /* flush the pipeline */ |
976 | if (DoC_is_2000(doc)) { | |
977 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
978 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
979 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
980 | } else if (DoC_is_MillenniumPlus(doc)) { | |
981 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
982 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
983 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
984 | } else { | |
985 | dummy = ReadDOC(docptr, ECCConf); | |
986 | dummy = ReadDOC(docptr, ECCConf); | |
987 | dummy = ReadDOC(docptr, ECCConf); | |
988 | } | |
61b03bd7 | 989 | |
25985edc | 990 | /* Error occurred ? */ |
1da177e4 LT |
991 | if (dummy & 0x80) { |
992 | for (i = 0; i < 6; i++) { | |
993 | if (DoC_is_MillenniumPlus(doc)) | |
994 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
995 | else | |
996 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
997 | if (calc_ecc[i] != empty_read_syndrome[i]) | |
998 | emptymatch = 0; | |
999 | } | |
1000 | /* If emptymatch=1, the read syndrome is consistent with an | |
1001 | all-0xff data and stored ecc block. Check the stored ecc. */ | |
1002 | if (emptymatch) { | |
1003 | for (i = 0; i < 6; i++) { | |
e0c7d767 DW |
1004 | if (read_ecc[i] == 0xff) |
1005 | continue; | |
1da177e4 LT |
1006 | emptymatch = 0; |
1007 | break; | |
1008 | } | |
1009 | } | |
1010 | /* If emptymatch still =1, check the data block. */ | |
1011 | if (emptymatch) { | |
e0c7d767 DW |
1012 | /* Note: this somewhat expensive test should not be triggered |
1013 | often. It could be optimized away by examining the data in | |
1014 | the readbuf routine, and remembering the result. */ | |
1da177e4 | 1015 | for (i = 0; i < 512; i++) { |
e0c7d767 DW |
1016 | if (dat[i] == 0xff) |
1017 | continue; | |
1da177e4 LT |
1018 | emptymatch = 0; |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | /* If emptymatch still =1, this is almost certainly a freshly- | |
1023 | erased block, in which case the ECC will not come out right. | |
1024 | We'll suppress the error and tell the caller everything's | |
1025 | OK. Because it is. */ | |
e0c7d767 DW |
1026 | if (!emptymatch) |
1027 | ret = doc_ecc_decode(rs_decoder, dat, calc_ecc); | |
1da177e4 LT |
1028 | if (ret > 0) |
1029 | printk(KERN_ERR "doc200x_correct_data corrected %d errors\n", ret); | |
61b03bd7 | 1030 | } |
1da177e4 LT |
1031 | if (DoC_is_MillenniumPlus(doc)) |
1032 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
1033 | else | |
1034 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
d57f4054 | 1035 | if (no_ecc_failures && mtd_is_eccerr(ret)) { |
1da177e4 LT |
1036 | printk(KERN_ERR "suppressing ECC failure\n"); |
1037 | ret = 0; | |
1038 | } | |
1039 | return ret; | |
1040 | } | |
61b03bd7 | 1041 | |
1da177e4 LT |
1042 | //u_char mydatabuf[528]; |
1043 | ||
abc37e67 DB |
1044 | /* The strange out-of-order .oobfree list below is a (possibly unneeded) |
1045 | * attempt to retain compatibility. It used to read: | |
1046 | * .oobfree = { {8, 8} } | |
1047 | * Since that leaves two bytes unusable, it was changed. But the following | |
1048 | * scheme might affect existing jffs2 installs by moving the cleanmarker: | |
1049 | * .oobfree = { {6, 10} } | |
1050 | * jffs2 seems to handle the above gracefully, but the current scheme seems | |
1051 | * safer. The only problem with it is that any code that parses oobfree must | |
1052 | * be able to handle out-of-order segments. | |
1053 | */ | |
5bd34c09 | 1054 | static struct nand_ecclayout doc200x_oobinfo = { |
e0c7d767 DW |
1055 | .eccbytes = 6, |
1056 | .eccpos = {0, 1, 2, 3, 4, 5}, | |
1057 | .oobfree = {{8, 8}, {6, 2}} | |
1da177e4 | 1058 | }; |
61b03bd7 | 1059 | |
1da177e4 | 1060 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
af901ca1 | 1061 | On successful return, buf will contain a copy of the media header for |
1da177e4 LT |
1062 | further processing. id is the string to scan for, and will presumably be |
1063 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
1064 | header. The page #s of the found media headers are placed in mh0_page and | |
1065 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 1066 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 LT |
1067 | { |
1068 | struct nand_chip *this = mtd->priv; | |
1069 | struct doc_priv *doc = this->priv; | |
1a78ff6b | 1070 | unsigned offs; |
1da177e4 LT |
1071 | int ret; |
1072 | size_t retlen; | |
1073 | ||
1a78ff6b | 1074 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
329ad399 | 1075 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 1076 | if (retlen != mtd->writesize) |
e0c7d767 | 1077 | continue; |
1da177e4 | 1078 | if (ret) { |
e0c7d767 | 1079 | printk(KERN_WARNING "ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 1080 | } |
e0c7d767 DW |
1081 | if (memcmp(buf, id, 6)) |
1082 | continue; | |
1da177e4 LT |
1083 | printk(KERN_INFO "Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1084 | if (doc->mh0_page == -1) { | |
1085 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
1086 | if (!findmirror) |
1087 | return 1; | |
1da177e4 LT |
1088 | continue; |
1089 | } | |
1090 | doc->mh1_page = offs >> this->page_shift; | |
1091 | return 2; | |
1092 | } | |
1093 | if (doc->mh0_page == -1) { | |
1094 | printk(KERN_WARNING "DiskOnChip %s Media Header not found.\n", id); | |
1095 | return 0; | |
1096 | } | |
1097 | /* Only one mediaheader was found. We want buf to contain a | |
1098 | mediaheader on return, so we'll have to re-read the one we found. */ | |
1099 | offs = doc->mh0_page << this->page_shift; | |
329ad399 | 1100 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 1101 | if (retlen != mtd->writesize) { |
1da177e4 LT |
1102 | /* Insanity. Give up. */ |
1103 | printk(KERN_ERR "Read DiskOnChip Media Header once, but can't reread it???\n"); | |
1104 | return 0; | |
1105 | } | |
1106 | return 1; | |
1107 | } | |
1108 | ||
e0c7d767 | 1109 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1110 | { |
1111 | struct nand_chip *this = mtd->priv; | |
1112 | struct doc_priv *doc = this->priv; | |
1113 | int ret = 0; | |
1114 | u_char *buf; | |
1115 | struct NFTLMediaHeader *mh; | |
1116 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 1117 | int numparts = 0; |
1da177e4 LT |
1118 | unsigned blocks, maxblocks; |
1119 | int offs, numheaders; | |
1120 | ||
28318776 | 1121 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1122 | if (!buf) { |
1123 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1124 | return 0; | |
1125 | } | |
e0c7d767 DW |
1126 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
1127 | goto out; | |
1128 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 1129 | |
96372446 HH |
1130 | le16_to_cpus(&mh->NumEraseUnits); |
1131 | le16_to_cpus(&mh->FirstPhysicalEUN); | |
1132 | le32_to_cpus(&mh->FormattedSize); | |
f29a4b86 | 1133 | |
1da177e4 LT |
1134 | printk(KERN_INFO " DataOrgID = %s\n" |
1135 | " NumEraseUnits = %d\n" | |
1136 | " FirstPhysicalEUN = %d\n" | |
1137 | " FormattedSize = %d\n" | |
1138 | " UnitSizeFactor = %d\n", | |
1139 | mh->DataOrgID, mh->NumEraseUnits, | |
1140 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
1141 | mh->UnitSizeFactor); | |
1da177e4 LT |
1142 | |
1143 | blocks = mtd->size >> this->phys_erase_shift; | |
1144 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1145 | ||
1146 | if (mh->UnitSizeFactor == 0x00) { | |
1147 | /* Auto-determine UnitSizeFactor. The constraints are: | |
1148 | - There can be at most 32768 virtual blocks. | |
1149 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
1150 | virtual blocks (because MediaHeader+BBT must fit in 1). |
1151 | */ | |
1da177e4 LT |
1152 | mh->UnitSizeFactor = 0xff; |
1153 | while (blocks > maxblocks) { | |
1154 | blocks >>= 1; | |
1155 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
1156 | mh->UnitSizeFactor--; | |
1157 | } | |
1158 | printk(KERN_WARNING "UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); | |
1159 | } | |
1160 | ||
1161 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
1162 | layers; variables with have already been configured by nand_scan. | |
1163 | Unfortunately, we didn't know before this point what these values | |
25985edc | 1164 | should be. Thus, this code is somewhat dependent on the exact |
1da177e4 LT |
1165 | implementation of the NAND layer. */ |
1166 | if (mh->UnitSizeFactor != 0xff) { | |
1167 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
1168 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); | |
1169 | printk(KERN_INFO "Setting virtual erase size to %d\n", mtd->erasesize); | |
1170 | blocks = mtd->size >> this->bbt_erase_shift; | |
1171 | maxblocks = min(32768U, mtd->erasesize - psize); | |
1172 | } | |
1173 | ||
1174 | if (blocks > maxblocks) { | |
1175 | printk(KERN_ERR "UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); | |
1176 | goto out; | |
1177 | } | |
1178 | ||
1179 | /* Skip past the media headers. */ | |
1180 | offs = max(doc->mh0_page, doc->mh1_page); | |
1181 | offs <<= this->page_shift; | |
1182 | offs += mtd->erasesize; | |
1183 | ||
1a78ff6b DB |
1184 | if (show_firmware_partition == 1) { |
1185 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
1186 | parts[0].offset = 0; | |
1187 | parts[0].size = offs; | |
1188 | numparts = 1; | |
1189 | } | |
1190 | ||
1191 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1192 | parts[numparts].offset = offs; | |
1193 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
1194 | ||
1195 | offs += parts[numparts].size; | |
1196 | numparts++; | |
1da177e4 | 1197 | |
1da177e4 | 1198 | if (offs < mtd->size) { |
1a78ff6b DB |
1199 | parts[numparts].name = " DiskOnChip Remainder partition"; |
1200 | parts[numparts].offset = offs; | |
1201 | parts[numparts].size = mtd->size - offs; | |
1202 | numparts++; | |
1da177e4 | 1203 | } |
1a78ff6b DB |
1204 | |
1205 | ret = numparts; | |
e0c7d767 | 1206 | out: |
1da177e4 LT |
1207 | kfree(buf); |
1208 | return ret; | |
1209 | } | |
1210 | ||
1211 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1212 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 LT |
1213 | { |
1214 | struct nand_chip *this = mtd->priv; | |
1215 | struct doc_priv *doc = this->priv; | |
1216 | int ret = 0; | |
1217 | u_char *buf; | |
1218 | struct INFTLMediaHeader *mh; | |
1219 | struct INFTLPartition *ip; | |
1220 | int numparts = 0; | |
1221 | int blocks; | |
1222 | int vshift, lastvunit = 0; | |
1223 | int i; | |
1224 | int end = mtd->size; | |
1225 | ||
1226 | if (inftl_bbt_write) | |
1227 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1228 | ||
28318776 | 1229 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 LT |
1230 | if (!buf) { |
1231 | printk(KERN_ERR "DiskOnChip mediaheader kmalloc failed!\n"); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
e0c7d767 DW |
1235 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1236 | goto out; | |
1da177e4 | 1237 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1238 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 | 1239 | |
96372446 HH |
1240 | le32_to_cpus(&mh->NoOfBootImageBlocks); |
1241 | le32_to_cpus(&mh->NoOfBinaryPartitions); | |
1242 | le32_to_cpus(&mh->NoOfBDTLPartitions); | |
1243 | le32_to_cpus(&mh->BlockMultiplierBits); | |
1244 | le32_to_cpus(&mh->FormatFlags); | |
1245 | le32_to_cpus(&mh->PercentUsed); | |
61b03bd7 | 1246 | |
1da177e4 LT |
1247 | printk(KERN_INFO " bootRecordID = %s\n" |
1248 | " NoOfBootImageBlocks = %d\n" | |
1249 | " NoOfBinaryPartitions = %d\n" | |
1250 | " NoOfBDTLPartitions = %d\n" | |
1251 | " BlockMultiplerBits = %d\n" | |
1252 | " FormatFlgs = %d\n" | |
1253 | " OsakVersion = %d.%d.%d.%d\n" | |
1254 | " PercentUsed = %d\n", | |
1255 | mh->bootRecordID, mh->NoOfBootImageBlocks, | |
1256 | mh->NoOfBinaryPartitions, | |
1257 | mh->NoOfBDTLPartitions, | |
1258 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1259 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1260 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1261 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1262 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1263 | mh->PercentUsed); | |
1da177e4 LT |
1264 | |
1265 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1266 | ||
1267 | blocks = mtd->size >> vshift; | |
1268 | if (blocks > 32768) { | |
1269 | printk(KERN_ERR "BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); | |
1270 | goto out; | |
1271 | } | |
1272 | ||
1273 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1274 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
1275 | printk(KERN_ERR "Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); | |
1276 | goto out; | |
1277 | } | |
1278 | ||
1279 | /* Scan the partitions */ | |
1280 | for (i = 0; (i < 4); i++) { | |
1281 | ip = &(mh->Partitions[i]); | |
96372446 HH |
1282 | le32_to_cpus(&ip->virtualUnits); |
1283 | le32_to_cpus(&ip->firstUnit); | |
1284 | le32_to_cpus(&ip->lastUnit); | |
1285 | le32_to_cpus(&ip->flags); | |
1286 | le32_to_cpus(&ip->spareUnits); | |
1287 | le32_to_cpus(&ip->Reserved0); | |
1da177e4 | 1288 | |
1da177e4 LT |
1289 | printk(KERN_INFO " PARTITION[%d] ->\n" |
1290 | " virtualUnits = %d\n" | |
1291 | " firstUnit = %d\n" | |
1292 | " lastUnit = %d\n" | |
1293 | " flags = 0x%x\n" | |
1294 | " spareUnits = %d\n", | |
1295 | i, ip->virtualUnits, ip->firstUnit, | |
1296 | ip->lastUnit, ip->flags, | |
1297 | ip->spareUnits); | |
1da177e4 | 1298 | |
1a78ff6b DB |
1299 | if ((show_firmware_partition == 1) && |
1300 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1301 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1302 | parts[0].offset = 0; | |
1303 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1304 | numparts = 1; | |
1305 | } | |
1da177e4 LT |
1306 | |
1307 | if (ip->flags & INFTL_BINARY) | |
1308 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1309 | else | |
1310 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1311 | parts[numparts].offset = ip->firstUnit << vshift; | |
1312 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1313 | numparts++; | |
e0c7d767 DW |
1314 | if (ip->lastUnit > lastvunit) |
1315 | lastvunit = ip->lastUnit; | |
1316 | if (ip->flags & INFTL_LAST) | |
1317 | break; | |
1da177e4 LT |
1318 | } |
1319 | lastvunit++; | |
1320 | if ((lastvunit << vshift) < end) { | |
1321 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1322 | parts[numparts].offset = lastvunit << vshift; | |
1323 | parts[numparts].size = end - parts[numparts].offset; | |
1324 | numparts++; | |
1325 | } | |
1326 | ret = numparts; | |
e0c7d767 | 1327 | out: |
1da177e4 LT |
1328 | kfree(buf); |
1329 | return ret; | |
1330 | } | |
1331 | ||
1332 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1333 | { | |
1334 | int ret, numparts; | |
1335 | struct nand_chip *this = mtd->priv; | |
1336 | struct doc_priv *doc = this->priv; | |
1337 | struct mtd_partition parts[2]; | |
1338 | ||
e0c7d767 | 1339 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1340 | /* On NFTL, we have to find the media headers before we can read the |
1341 | BBTs, since they're stored in the media header eraseblocks. */ | |
1342 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1343 | if (!numparts) |
1344 | return -EIO; | |
1da177e4 LT |
1345 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1346 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1347 | NAND_BBT_VERSION; | |
1348 | this->bbt_td->veroffs = 7; | |
1349 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1350 | if (doc->mh1_page != -1) { | |
1351 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1352 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1353 | NAND_BBT_VERSION; | |
1354 | this->bbt_md->veroffs = 7; | |
1355 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1356 | } else { | |
1357 | this->bbt_md = NULL; | |
1358 | } | |
1359 | ||
1360 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1361 | At least as nand_bbt.c is currently written. */ | |
1362 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1363 | return ret; | |
0f47e952 | 1364 | mtd_device_register(mtd, NULL, 0); |
1da177e4 | 1365 | if (!no_autopart) |
0f47e952 | 1366 | mtd_device_register(mtd, parts, numparts); |
1da177e4 LT |
1367 | return 0; |
1368 | } | |
1369 | ||
1370 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1371 | { | |
1372 | int ret, numparts; | |
1373 | struct nand_chip *this = mtd->priv; | |
1374 | struct doc_priv *doc = this->priv; | |
1375 | struct mtd_partition parts[5]; | |
1376 | ||
1377 | if (this->numchips > doc->chips_per_floor) { | |
1378 | printk(KERN_ERR "Multi-floor INFTL devices not yet supported.\n"); | |
1379 | return -EIO; | |
1380 | } | |
1381 | ||
1382 | if (DoC_is_MillenniumPlus(doc)) { | |
1383 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1384 | if (inftl_bbt_write) | |
1385 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1386 | this->bbt_td->pages[0] = 2; | |
1387 | this->bbt_md = NULL; | |
1388 | } else { | |
e0c7d767 | 1389 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1390 | if (inftl_bbt_write) |
1391 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1392 | this->bbt_td->offs = 8; | |
1393 | this->bbt_td->len = 8; | |
1394 | this->bbt_td->veroffs = 7; | |
1395 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1396 | this->bbt_td->reserved_block_code = 0x01; | |
1397 | this->bbt_td->pattern = "MSYS_BBT"; | |
1398 | ||
e0c7d767 | 1399 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1400 | if (inftl_bbt_write) |
1401 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1402 | this->bbt_md->offs = 8; | |
1403 | this->bbt_md->len = 8; | |
1404 | this->bbt_md->veroffs = 7; | |
1405 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1406 | this->bbt_md->reserved_block_code = 0x01; | |
1407 | this->bbt_md->pattern = "TBB_SYSM"; | |
1408 | } | |
1409 | ||
1410 | /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set. | |
1411 | At least as nand_bbt.c is currently written. */ | |
1412 | if ((ret = nand_scan_bbt(mtd, NULL))) | |
1413 | return ret; | |
e0c7d767 | 1414 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1415 | numparts = inftl_partscan(mtd, parts); |
1416 | /* At least for now, require the INFTL Media Header. We could probably | |
1417 | do without it for non-INFTL use, since all it gives us is | |
1418 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1419 | if (!numparts) |
1420 | return -EIO; | |
0f47e952 | 1421 | mtd_device_register(mtd, NULL, 0); |
1da177e4 | 1422 | if (!no_autopart) |
0f47e952 | 1423 | mtd_device_register(mtd, parts, numparts); |
1da177e4 LT |
1424 | return 0; |
1425 | } | |
1426 | ||
1427 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1428 | { | |
1429 | struct nand_chip *this = mtd->priv; | |
1430 | struct doc_priv *doc = this->priv; | |
1431 | ||
1da177e4 LT |
1432 | this->read_byte = doc2000_read_byte; |
1433 | this->write_buf = doc2000_writebuf; | |
1434 | this->read_buf = doc2000_readbuf; | |
1435 | this->verify_buf = doc2000_verifybuf; | |
1436 | this->scan_bbt = nftl_scan_bbt; | |
1437 | ||
1438 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1439 | doc2000_count_chips(mtd); | |
1440 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1441 | return (4 * doc->chips_per_floor); | |
1442 | } | |
1443 | ||
1444 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1445 | { | |
1446 | struct nand_chip *this = mtd->priv; | |
1447 | struct doc_priv *doc = this->priv; | |
1448 | ||
1da177e4 LT |
1449 | this->read_byte = doc2001_read_byte; |
1450 | this->write_buf = doc2001_writebuf; | |
1451 | this->read_buf = doc2001_readbuf; | |
1452 | this->verify_buf = doc2001_verifybuf; | |
1453 | ||
1454 | ReadDOC(doc->virtadr, ChipID); | |
1455 | ReadDOC(doc->virtadr, ChipID); | |
1456 | ReadDOC(doc->virtadr, ChipID); | |
1457 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1458 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1459 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1460 | Treat it like a Millennium, except that it |
1461 | can have multiple chips. */ | |
1462 | doc2000_count_chips(mtd); | |
1463 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
1464 | this->scan_bbt = inftl_scan_bbt; | |
1465 | return (4 * doc->chips_per_floor); | |
1466 | } else { | |
1467 | /* Bog-standard Millennium */ | |
1468 | doc->chips_per_floor = 1; | |
1469 | mtd->name = "DiskOnChip Millennium"; | |
1470 | this->scan_bbt = nftl_scan_bbt; | |
1471 | return 1; | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1476 | { | |
1477 | struct nand_chip *this = mtd->priv; | |
1478 | struct doc_priv *doc = this->priv; | |
1479 | ||
1da177e4 LT |
1480 | this->read_byte = doc2001plus_read_byte; |
1481 | this->write_buf = doc2001plus_writebuf; | |
1482 | this->read_buf = doc2001plus_readbuf; | |
1483 | this->verify_buf = doc2001plus_verifybuf; | |
1484 | this->scan_bbt = inftl_scan_bbt; | |
7abd3ef9 | 1485 | this->cmd_ctrl = NULL; |
1da177e4 LT |
1486 | this->select_chip = doc2001plus_select_chip; |
1487 | this->cmdfunc = doc2001plus_command; | |
0cddd6c2 | 1488 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1489 | |
1490 | doc->chips_per_floor = 1; | |
1491 | mtd->name = "DiskOnChip Millennium Plus"; | |
1492 | ||
1493 | return 1; | |
1494 | } | |
1495 | ||
858119e1 | 1496 | static int __init doc_probe(unsigned long physadr) |
1da177e4 LT |
1497 | { |
1498 | unsigned char ChipID; | |
1499 | struct mtd_info *mtd; | |
1500 | struct nand_chip *nand; | |
1501 | struct doc_priv *doc; | |
1502 | void __iomem *virtadr; | |
1503 | unsigned char save_control; | |
1504 | unsigned char tmp, tmpb, tmpc; | |
1505 | int reg, len, numchips; | |
1506 | int ret = 0; | |
1507 | ||
1508 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); | |
1509 | if (!virtadr) { | |
1510 | printk(KERN_ERR "Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", DOC_IOREMAP_LEN, physadr); | |
1511 | return -EIO; | |
1512 | } | |
1513 | ||
1514 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1515 | * bootup procedure will put the device into reset mode, and | |
1516 | * it's not possible to talk to it without actually writing | |
1517 | * to the DOCControl register. So we store the current contents | |
1518 | * of the DOCControl register's location, in case we later decide | |
1519 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1520 | * found it. |
1da177e4 LT |
1521 | */ |
1522 | save_control = ReadDOC(virtadr, DOCControl); | |
1523 | ||
1524 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1525 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1526 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1527 | |
1528 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1529 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1530 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1531 | |
1532 | ChipID = ReadDOC(virtadr, ChipID); | |
1533 | ||
e0c7d767 | 1534 | switch (ChipID) { |
1da177e4 LT |
1535 | case DOC_ChipID_Doc2k: |
1536 | reg = DoC_2k_ECCStatus; | |
1537 | break; | |
1538 | case DOC_ChipID_DocMil: | |
1539 | reg = DoC_ECCConf; | |
1540 | break; | |
1541 | case DOC_ChipID_DocMilPlus16: | |
1542 | case DOC_ChipID_DocMilPlus32: | |
1543 | case 0: | |
1544 | /* Possible Millennium Plus, need to do more checks */ | |
1545 | /* Possibly release from power down mode */ | |
1546 | for (tmp = 0; (tmp < 4); tmp++) | |
1547 | ReadDOC(virtadr, Mplus_Power); | |
1548 | ||
1549 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1550 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1551 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1552 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1553 | ||
1554 | mdelay(1); | |
1555 | /* Enable the Millennium Plus ASIC */ | |
e0c7d767 | 1556 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1557 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1558 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1559 | mdelay(1); | |
1560 | ||
1561 | ChipID = ReadDOC(virtadr, ChipID); | |
1562 | ||
1563 | switch (ChipID) { | |
1564 | case DOC_ChipID_DocMilPlus16: | |
1565 | reg = DoC_Mplus_Toggle; | |
1566 | break; | |
1567 | case DOC_ChipID_DocMilPlus32: | |
1568 | printk(KERN_ERR "DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); | |
1569 | default: | |
1570 | ret = -ENODEV; | |
1571 | goto notfound; | |
1572 | } | |
1573 | break; | |
1574 | ||
1575 | default: | |
1576 | ret = -ENODEV; | |
1577 | goto notfound; | |
1578 | } | |
1579 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1580 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1581 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1582 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1583 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
1584 | printk(KERN_WARNING "Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); | |
1585 | ret = -ENODEV; | |
1586 | goto notfound; | |
1587 | } | |
1588 | ||
1589 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1590 | unsigned char oldval; | |
1591 | unsigned char newval; | |
1592 | nand = mtd->priv; | |
1593 | doc = nand->priv; | |
1594 | /* Use the alias resolution register to determine if this is | |
1595 | in fact the same DOC aliased to a new address. If writes | |
1596 | to one chip's alias resolution register change the value on | |
1597 | the other chip, they're the same chip. */ | |
1598 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1599 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1600 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1601 | } else { | |
1602 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1603 | newval = ReadDOC(virtadr, AliasResolution); | |
1604 | } | |
1605 | if (oldval != newval) | |
1606 | continue; | |
1607 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1608 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1609 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1610 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1611 | } else { |
1612 | WriteDOC(~newval, virtadr, AliasResolution); | |
1613 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1614 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1615 | } |
1616 | newval = ~newval; | |
1617 | if (oldval == newval) { | |
1618 | printk(KERN_DEBUG "Found alias of DOC at 0x%lx to 0x%lx\n", doc->physadr, physadr); | |
1619 | goto notfound; | |
1620 | } | |
1621 | } | |
1622 | ||
1623 | printk(KERN_NOTICE "DiskOnChip found at 0x%lx\n", physadr); | |
1624 | ||
1625 | len = sizeof(struct mtd_info) + | |
e0c7d767 | 1626 | sizeof(struct nand_chip) + sizeof(struct doc_priv) + (2 * sizeof(struct nand_bbt_descr)); |
95b93a0c | 1627 | mtd = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1628 | if (!mtd) { |
1629 | printk(KERN_ERR "DiskOnChip kmalloc (%d bytes) failed!\n", len); | |
1630 | ret = -ENOMEM; | |
1631 | goto fail; | |
1632 | } | |
1da177e4 LT |
1633 | |
1634 | nand = (struct nand_chip *) (mtd + 1); | |
1635 | doc = (struct doc_priv *) (nand + 1); | |
1636 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); | |
1637 | nand->bbt_md = nand->bbt_td + 1; | |
1638 | ||
1639 | mtd->priv = nand; | |
1640 | mtd->owner = THIS_MODULE; | |
1641 | ||
1642 | nand->priv = doc; | |
1643 | nand->select_chip = doc200x_select_chip; | |
7abd3ef9 | 1644 | nand->cmd_ctrl = doc200x_hwcontrol; |
1da177e4 LT |
1645 | nand->dev_ready = doc200x_dev_ready; |
1646 | nand->waitfunc = doc200x_wait; | |
1647 | nand->block_bad = doc200x_block_bad; | |
6dfc6d25 TG |
1648 | nand->ecc.hwctl = doc200x_enable_hwecc; |
1649 | nand->ecc.calculate = doc200x_calculate_ecc; | |
1650 | nand->ecc.correct = doc200x_correct_data; | |
1da177e4 | 1651 | |
5bd34c09 | 1652 | nand->ecc.layout = &doc200x_oobinfo; |
6dfc6d25 TG |
1653 | nand->ecc.mode = NAND_ECC_HW_SYNDROME; |
1654 | nand->ecc.size = 512; | |
1655 | nand->ecc.bytes = 6; | |
bb9ebd4e | 1656 | nand->bbt_options = NAND_BBT_USE_FLASH; |
1da177e4 LT |
1657 | |
1658 | doc->physadr = physadr; | |
1659 | doc->virtadr = virtadr; | |
1660 | doc->ChipID = ChipID; | |
1661 | doc->curfloor = -1; | |
1662 | doc->curchip = -1; | |
1663 | doc->mh0_page = -1; | |
1664 | doc->mh1_page = -1; | |
1665 | doc->nextdoc = doclist; | |
1666 | ||
1667 | if (ChipID == DOC_ChipID_Doc2k) | |
1668 | numchips = doc2000_init(mtd); | |
1669 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1670 | numchips = doc2001plus_init(mtd); | |
1671 | else | |
1672 | numchips = doc2001_init(mtd); | |
1673 | ||
1674 | if ((ret = nand_scan(mtd, numchips))) { | |
1675 | /* DBB note: i believe nand_release is necessary here, as | |
1676 | buffers may have been allocated in nand_base. Check with | |
1677 | Thomas. FIX ME! */ | |
0f47e952 JI |
1678 | /* nand_release will call mtd_device_unregister, but we |
1679 | haven't yet added it. This is handled without incident by | |
1680 | mtd_device_unregister, as far as I can tell. */ | |
1da177e4 LT |
1681 | nand_release(mtd); |
1682 | kfree(mtd); | |
1683 | goto fail; | |
1684 | } | |
1685 | ||
1686 | /* Success! */ | |
1687 | doclist = mtd; | |
1688 | return 0; | |
1689 | ||
e0c7d767 | 1690 | notfound: |
1da177e4 LT |
1691 | /* Put back the contents of the DOCControl register, in case it's not |
1692 | actually a DiskOnChip. */ | |
1693 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1694 | fail: |
1da177e4 LT |
1695 | iounmap(virtadr); |
1696 | return ret; | |
1697 | } | |
1698 | ||
1699 | static void release_nanddoc(void) | |
1700 | { | |
e0c7d767 | 1701 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1702 | struct nand_chip *nand; |
1703 | struct doc_priv *doc; | |
1704 | ||
1705 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
1706 | nand = mtd->priv; | |
1707 | doc = nand->priv; | |
1708 | ||
1709 | nextmtd = doc->nextdoc; | |
1710 | nand_release(mtd); | |
1711 | iounmap(doc->virtadr); | |
1712 | kfree(mtd); | |
1713 | } | |
1714 | } | |
1715 | ||
1716 | static int __init init_nanddoc(void) | |
1717 | { | |
1718 | int i, ret = 0; | |
1719 | ||
1720 | /* We could create the decoder on demand, if memory is a concern. | |
61b03bd7 | 1721 | * This way we have it handy, if an error happens |
1da177e4 LT |
1722 | * |
1723 | * Symbolsize is 10 (bits) | |
1724 | * Primitve polynomial is x^10+x^3+1 | |
1725 | * first consecutive root is 510 | |
1726 | * primitve element to generate roots = 1 | |
1727 | * generator polinomial degree = 4 | |
1728 | */ | |
1729 | rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
e0c7d767 DW |
1730 | if (!rs_decoder) { |
1731 | printk(KERN_ERR "DiskOnChip: Could not create a RS decoder\n"); | |
1da177e4 LT |
1732 | return -ENOMEM; |
1733 | } | |
1734 | ||
1735 | if (doc_config_location) { | |
1736 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); | |
1737 | ret = doc_probe(doc_config_location); | |
1738 | if (ret < 0) | |
1739 | goto outerr; | |
1740 | } else { | |
e0c7d767 | 1741 | for (i = 0; (doc_locations[i] != 0xffffffff); i++) { |
1da177e4 LT |
1742 | doc_probe(doc_locations[i]); |
1743 | } | |
1744 | } | |
1745 | /* No banner message any more. Print a message if no DiskOnChip | |
1746 | found, so the user knows we at least tried. */ | |
1747 | if (!doclist) { | |
1748 | printk(KERN_INFO "No valid DiskOnChip devices found\n"); | |
1749 | ret = -ENODEV; | |
1750 | goto outerr; | |
1751 | } | |
1752 | return 0; | |
e0c7d767 | 1753 | outerr: |
1da177e4 LT |
1754 | free_rs(rs_decoder); |
1755 | return ret; | |
1756 | } | |
1757 | ||
1758 | static void __exit cleanup_nanddoc(void) | |
1759 | { | |
1760 | /* Cleanup the nand/DoC resources */ | |
1761 | release_nanddoc(); | |
1762 | ||
1763 | /* Free the reed solomon resources */ | |
1764 | if (rs_decoder) { | |
1765 | free_rs(rs_decoder); | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | module_init(init_nanddoc); | |
1770 | module_exit(cleanup_nanddoc); | |
1771 | ||
1772 | MODULE_LICENSE("GPL"); | |
1773 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
2a7af8ca | 1774 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver"); |