Commit | Line | Data |
---|---|---|
09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
61b03bd7 | 2 | /* |
1da177e4 LT |
3 | * (C) 2003 Red Hat, Inc. |
4 | * (C) 2004 Dan Brown <dan_brown@ieee.org> | |
5 | * (C) 2004 Kalev Lember <kalev@smartlink.ee> | |
6 | * | |
7 | * Author: David Woodhouse <dwmw2@infradead.org> | |
8 | * Additional Diskonchip 2000 and Millennium support by Dan Brown <dan_brown@ieee.org> | |
9 | * Diskonchip Millennium Plus support by Kalev Lember <kalev@smartlink.ee> | |
61b03bd7 | 10 | * |
1da177e4 | 11 | * Error correction code lifted from the old docecc code |
61b03bd7 | 12 | * Author: Fabrice Bellard (fabrice.bellard@netgem.com) |
1da177e4 LT |
13 | * Copyright (C) 2000 Netgem S.A. |
14 | * converted to the generic Reed-Solomon library by Thomas Gleixner <tglx@linutronix.de> | |
61b03bd7 | 15 | * |
1da177e4 | 16 | * Interface to generic NAND code for M-Systems DiskOnChip devices |
1da177e4 LT |
17 | */ |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/rslib.h> | |
24 | #include <linux/moduleparam.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
2584cf83 | 26 | #include <linux/io.h> |
1da177e4 LT |
27 | |
28 | #include <linux/mtd/mtd.h> | |
d4092d76 | 29 | #include <linux/mtd/rawnand.h> |
1da177e4 | 30 | #include <linux/mtd/doc2000.h> |
1da177e4 LT |
31 | #include <linux/mtd/partitions.h> |
32 | #include <linux/mtd/inftl.h> | |
a0e5cc58 | 33 | #include <linux/module.h> |
1da177e4 LT |
34 | |
35 | /* Where to look for the devices? */ | |
651078ba TG |
36 | #ifndef CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS |
37 | #define CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS 0 | |
1da177e4 LT |
38 | #endif |
39 | ||
14a95b8a | 40 | static unsigned long doc_locations[] __initdata = { |
1da177e4 | 41 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) |
651078ba | 42 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_PROBE_HIGH |
61b03bd7 | 43 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
1da177e4 | 44 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
61b03bd7 TG |
45 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
46 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, | |
1da177e4 | 47 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
9d403496 | 48 | #else |
61b03bd7 | 49 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
1da177e4 | 50 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
61b03bd7 TG |
51 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
52 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, | |
1da177e4 | 53 | 0xe8000, 0xea000, 0xec000, 0xee000, |
9d403496 | 54 | #endif |
1da177e4 | 55 | #endif |
21c9fb61 | 56 | }; |
1da177e4 LT |
57 | |
58 | static struct mtd_info *doclist = NULL; | |
59 | ||
60 | struct doc_priv { | |
f37b1d3c | 61 | struct nand_controller base; |
1da177e4 LT |
62 | void __iomem *virtadr; |
63 | unsigned long physadr; | |
64 | u_char ChipID; | |
65 | u_char CDSNControl; | |
e0c7d767 | 66 | int chips_per_floor; /* The number of chips detected on each floor */ |
1da177e4 LT |
67 | int curfloor; |
68 | int curchip; | |
69 | int mh0_page; | |
70 | int mh1_page; | |
964dfce9 | 71 | struct rs_control *rs_decoder; |
1da177e4 | 72 | struct mtd_info *nextdoc; |
fddf5cec | 73 | bool supports_32b_reads; |
d24fe0c3 BN |
74 | |
75 | /* Handle the last stage of initialization (BBT scan, partitioning) */ | |
76 | int (*late_init)(struct mtd_info *mtd); | |
1da177e4 LT |
77 | }; |
78 | ||
1da177e4 LT |
79 | /* This is the ecc value computed by the HW ecc generator upon writing an empty |
80 | page, one with all 0xff for data. */ | |
81 | static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 }; | |
82 | ||
83 | #define INFTL_BBT_RESERVED_BLOCKS 4 | |
84 | ||
85 | #define DoC_is_MillenniumPlus(doc) ((doc)->ChipID == DOC_ChipID_DocMilPlus16 || (doc)->ChipID == DOC_ChipID_DocMilPlus32) | |
86 | #define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil) | |
87 | #define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k) | |
88 | ||
e0c7d767 | 89 | static int debug = 0; |
1da177e4 LT |
90 | module_param(debug, int, 0); |
91 | ||
e0c7d767 | 92 | static int try_dword = 1; |
1da177e4 LT |
93 | module_param(try_dword, int, 0); |
94 | ||
e0c7d767 | 95 | static int no_ecc_failures = 0; |
1da177e4 LT |
96 | module_param(no_ecc_failures, int, 0); |
97 | ||
e0c7d767 | 98 | static int no_autopart = 0; |
1da177e4 | 99 | module_param(no_autopart, int, 0); |
1a78ff6b | 100 | |
e0c7d767 | 101 | static int show_firmware_partition = 0; |
1a78ff6b | 102 | module_param(show_firmware_partition, int, 0); |
1da177e4 | 103 | |
89e2bf61 | 104 | #ifdef CONFIG_MTD_NAND_DISKONCHIP_BBTWRITE |
e0c7d767 | 105 | static int inftl_bbt_write = 1; |
1da177e4 | 106 | #else |
e0c7d767 | 107 | static int inftl_bbt_write = 0; |
1da177e4 LT |
108 | #endif |
109 | module_param(inftl_bbt_write, int, 0); | |
110 | ||
651078ba | 111 | static unsigned long doc_config_location = CONFIG_MTD_NAND_DISKONCHIP_PROBE_ADDRESS; |
1da177e4 LT |
112 | module_param(doc_config_location, ulong, 0); |
113 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); | |
114 | ||
1da177e4 LT |
115 | /* Sector size for HW ECC */ |
116 | #define SECTOR_SIZE 512 | |
117 | /* The sector bytes are packed into NB_DATA 10 bit words */ | |
118 | #define NB_DATA (((SECTOR_SIZE + 1) * 8 + 6) / 10) | |
119 | /* Number of roots */ | |
120 | #define NROOTS 4 | |
121 | /* First consective root */ | |
122 | #define FCR 510 | |
123 | /* Number of symbols */ | |
124 | #define NN 1023 | |
125 | ||
61b03bd7 | 126 | /* |
1da177e4 | 127 | * The HW decoder in the DoC ASIC's provides us a error syndrome, |
7854d3f7 | 128 | * which we must convert to a standard syndrome usable by the generic |
1da177e4 LT |
129 | * Reed-Solomon library code. |
130 | * | |
131 | * Fabrice Bellard figured this out in the old docecc code. I added | |
132 | * some comments, improved a minor bit and converted it to make use | |
25985edc | 133 | * of the generic Reed-Solomon library. tglx |
1da177e4 | 134 | */ |
e0c7d767 | 135 | static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc) |
1da177e4 LT |
136 | { |
137 | int i, j, nerr, errpos[8]; | |
138 | uint8_t parity; | |
139 | uint16_t ds[4], s[5], tmp, errval[8], syn[4]; | |
21633981 | 140 | struct rs_codec *cd = rs->codec; |
1da177e4 | 141 | |
c9fb6773 | 142 | memset(syn, 0, sizeof(syn)); |
1da177e4 LT |
143 | /* Convert the ecc bytes into words */ |
144 | ds[0] = ((ecc[4] & 0xff) >> 0) | ((ecc[5] & 0x03) << 8); | |
145 | ds[1] = ((ecc[5] & 0xfc) >> 2) | ((ecc[2] & 0x0f) << 6); | |
146 | ds[2] = ((ecc[2] & 0xf0) >> 4) | ((ecc[3] & 0x3f) << 4); | |
147 | ds[3] = ((ecc[3] & 0xc0) >> 6) | ((ecc[0] & 0xff) << 2); | |
148 | parity = ecc[1]; | |
149 | ||
7854d3f7 | 150 | /* Initialize the syndrome buffer */ |
1da177e4 LT |
151 | for (i = 0; i < NROOTS; i++) |
152 | s[i] = ds[0]; | |
61b03bd7 TG |
153 | /* |
154 | * Evaluate | |
1da177e4 LT |
155 | * s[i] = ds[3]x^3 + ds[2]x^2 + ds[1]x^1 + ds[0] |
156 | * where x = alpha^(FCR + i) | |
157 | */ | |
e0c7d767 DW |
158 | for (j = 1; j < NROOTS; j++) { |
159 | if (ds[j] == 0) | |
1da177e4 | 160 | continue; |
21633981 | 161 | tmp = cd->index_of[ds[j]]; |
e0c7d767 | 162 | for (i = 0; i < NROOTS; i++) |
21633981 | 163 | s[i] ^= cd->alpha_to[rs_modnn(cd, tmp + (FCR + i) * j)]; |
1da177e4 LT |
164 | } |
165 | ||
c9fb6773 | 166 | /* Calc syn[i] = s[i] / alpha^(v + i) */ |
1da177e4 | 167 | for (i = 0; i < NROOTS; i++) { |
c9fb6773 | 168 | if (s[i]) |
21633981 | 169 | syn[i] = rs_modnn(cd, cd->index_of[s[i]] + (NN - FCR - i)); |
1da177e4 LT |
170 | } |
171 | /* Call the decoder library */ | |
172 | nerr = decode_rs16(rs, NULL, NULL, 1019, syn, 0, errpos, 0, errval); | |
173 | ||
174 | /* Incorrectable errors ? */ | |
175 | if (nerr < 0) | |
176 | return nerr; | |
177 | ||
61b03bd7 | 178 | /* |
1da177e4 LT |
179 | * Correct the errors. The bitpositions are a bit of magic, |
180 | * but they are given by the design of the de/encoder circuit | |
181 | * in the DoC ASIC's. | |
182 | */ | |
e0c7d767 | 183 | for (i = 0; i < nerr; i++) { |
1da177e4 LT |
184 | int index, bitpos, pos = 1015 - errpos[i]; |
185 | uint8_t val; | |
186 | if (pos >= NB_DATA && pos < 1019) | |
187 | continue; | |
188 | if (pos < NB_DATA) { | |
189 | /* extract bit position (MSB first) */ | |
190 | pos = 10 * (NB_DATA - 1 - pos) - 6; | |
191 | /* now correct the following 10 bits. At most two bytes | |
192 | can be modified since pos is even */ | |
193 | index = (pos >> 3) ^ 1; | |
194 | bitpos = pos & 7; | |
e0c7d767 | 195 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
1da177e4 LT |
196 | val = (uint8_t) (errval[i] >> (2 + bitpos)); |
197 | parity ^= val; | |
198 | if (index < SECTOR_SIZE) | |
199 | data[index] ^= val; | |
200 | } | |
201 | index = ((pos >> 3) + 1) ^ 1; | |
202 | bitpos = (bitpos + 10) & 7; | |
203 | if (bitpos == 0) | |
204 | bitpos = 8; | |
e0c7d767 DW |
205 | if ((index >= 0 && index < SECTOR_SIZE) || index == (SECTOR_SIZE + 1)) { |
206 | val = (uint8_t) (errval[i] << (8 - bitpos)); | |
1da177e4 LT |
207 | parity ^= val; |
208 | if (index < SECTOR_SIZE) | |
209 | data[index] ^= val; | |
210 | } | |
211 | } | |
212 | } | |
213 | /* If the parity is wrong, no rescue possible */ | |
eb684507 | 214 | return parity ? -EBADMSG : nerr; |
1da177e4 LT |
215 | } |
216 | ||
217 | static void DoC_Delay(struct doc_priv *doc, unsigned short cycles) | |
218 | { | |
63c34f21 | 219 | volatile char __always_unused dummy; |
1da177e4 | 220 | int i; |
61b03bd7 | 221 | |
1da177e4 LT |
222 | for (i = 0; i < cycles; i++) { |
223 | if (DoC_is_Millennium(doc)) | |
224 | dummy = ReadDOC(doc->virtadr, NOP); | |
225 | else if (DoC_is_MillenniumPlus(doc)) | |
226 | dummy = ReadDOC(doc->virtadr, Mplus_NOP); | |
227 | else | |
228 | dummy = ReadDOC(doc->virtadr, DOCStatus); | |
229 | } | |
61b03bd7 | 230 | |
1da177e4 LT |
231 | } |
232 | ||
233 | #define CDSN_CTRL_FR_B_MASK (CDSN_CTRL_FR_B0 | CDSN_CTRL_FR_B1) | |
234 | ||
235 | /* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ | |
236 | static int _DoC_WaitReady(struct doc_priv *doc) | |
237 | { | |
e0c7d767 | 238 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
239 | unsigned long timeo = jiffies + (HZ * 10); |
240 | ||
e0c7d767 DW |
241 | if (debug) |
242 | printk("_DoC_WaitReady...\n"); | |
1da177e4 LT |
243 | /* Out-of-line routine to wait for chip response */ |
244 | if (DoC_is_MillenniumPlus(doc)) { | |
245 | while ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) { | |
246 | if (time_after(jiffies, timeo)) { | |
247 | printk("_DoC_WaitReady timed out.\n"); | |
248 | return -EIO; | |
249 | } | |
250 | udelay(1); | |
251 | cond_resched(); | |
252 | } | |
253 | } else { | |
254 | while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { | |
255 | if (time_after(jiffies, timeo)) { | |
256 | printk("_DoC_WaitReady timed out.\n"); | |
257 | return -EIO; | |
258 | } | |
259 | udelay(1); | |
260 | cond_resched(); | |
261 | } | |
262 | } | |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | static inline int DoC_WaitReady(struct doc_priv *doc) | |
268 | { | |
e0c7d767 | 269 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
270 | int ret = 0; |
271 | ||
272 | if (DoC_is_MillenniumPlus(doc)) { | |
273 | DoC_Delay(doc, 4); | |
274 | ||
275 | if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) | |
276 | /* Call the out-of-line routine to wait */ | |
277 | ret = _DoC_WaitReady(doc); | |
278 | } else { | |
279 | DoC_Delay(doc, 4); | |
280 | ||
281 | if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) | |
282 | /* Call the out-of-line routine to wait */ | |
283 | ret = _DoC_WaitReady(doc); | |
284 | DoC_Delay(doc, 2); | |
285 | } | |
286 | ||
e0c7d767 DW |
287 | if (debug) |
288 | printk("DoC_WaitReady OK\n"); | |
1da177e4 LT |
289 | return ret; |
290 | } | |
291 | ||
c0739d85 | 292 | static void doc2000_write_byte(struct nand_chip *this, u_char datum) |
1da177e4 | 293 | { |
d699ed25 | 294 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 295 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 296 | |
e0c7d767 DW |
297 | if (debug) |
298 | printk("write_byte %02x\n", datum); | |
1da177e4 LT |
299 | WriteDOC(datum, docptr, CDSNSlowIO); |
300 | WriteDOC(datum, docptr, 2k_CDSN_IO); | |
301 | } | |
302 | ||
c0739d85 BB |
303 | static void doc2000_writebuf(struct nand_chip *this, const u_char *buf, |
304 | int len) | |
1da177e4 | 305 | { |
d699ed25 | 306 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 307 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 308 | int i; |
e0c7d767 DW |
309 | if (debug) |
310 | printk("writebuf of %d bytes: ", len); | |
311 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
312 | WriteDOC_(buf[i], docptr, DoC_2k_CDSN_IO + i); |
313 | if (debug && i < 16) | |
314 | printk("%02x ", buf[i]); | |
315 | } | |
e0c7d767 DW |
316 | if (debug) |
317 | printk("\n"); | |
1da177e4 LT |
318 | } |
319 | ||
7e534323 | 320 | static void doc2000_readbuf(struct nand_chip *this, u_char *buf, int len) |
1da177e4 | 321 | { |
d699ed25 | 322 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 323 | void __iomem *docptr = doc->virtadr; |
fddf5cec | 324 | u32 *buf32 = (u32 *)buf; |
e0c7d767 | 325 | int i; |
1da177e4 | 326 | |
e0c7d767 DW |
327 | if (debug) |
328 | printk("readbuf of %d bytes: ", len); | |
1da177e4 | 329 | |
fddf5cec BB |
330 | if (!doc->supports_32b_reads || |
331 | ((((unsigned long)buf) | len) & 3)) { | |
332 | for (i = 0; i < len; i++) | |
333 | buf[i] = ReadDOC(docptr, 2k_CDSN_IO + i); | |
1da177e4 | 334 | } else { |
fddf5cec BB |
335 | for (i = 0; i < len / 4; i++) |
336 | buf32[i] = readl(docptr + DoC_2k_CDSN_IO + i); | |
1da177e4 LT |
337 | } |
338 | } | |
339 | ||
f46eb7af BB |
340 | /* |
341 | * We need our own readid() here because it's called before the NAND chip | |
342 | * has been initialized, and calling nand_op_readid() would lead to a NULL | |
343 | * pointer exception when dereferencing the NAND timings. | |
344 | */ | |
345 | static void doc200x_readid(struct nand_chip *this, unsigned int cs, u8 *id) | |
346 | { | |
347 | u8 addr = 0; | |
348 | struct nand_op_instr instrs[] = { | |
349 | NAND_OP_CMD(NAND_CMD_READID, 0), | |
350 | NAND_OP_ADDR(1, &addr, 50), | |
351 | NAND_OP_8BIT_DATA_IN(2, id, 0), | |
352 | }; | |
353 | ||
354 | struct nand_operation op = NAND_OPERATION(cs, instrs); | |
355 | ||
356 | if (!id) | |
357 | op.ninstrs--; | |
358 | ||
359 | this->controller->ops->exec_op(this, &op, false); | |
360 | } | |
361 | ||
1da177e4 LT |
362 | static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr) |
363 | { | |
4bd4ebcc | 364 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 365 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 | 366 | uint16_t ret; |
f46eb7af | 367 | u8 id[2]; |
1da177e4 | 368 | |
f46eb7af | 369 | doc200x_readid(this, nr, id); |
61b03bd7 | 370 | |
f46eb7af | 371 | ret = ((u16)id[0] << 8) | id[1]; |
1da177e4 LT |
372 | |
373 | if (doc->ChipID == DOC_ChipID_Doc2k && try_dword && !nr) { | |
374 | /* First chip probe. See if we get same results by 32-bit access */ | |
375 | union { | |
376 | uint32_t dword; | |
377 | uint8_t byte[4]; | |
378 | } ident; | |
379 | void __iomem *docptr = doc->virtadr; | |
380 | ||
f46eb7af | 381 | doc200x_readid(this, nr, NULL); |
dfd61294 | 382 | |
1da177e4 LT |
383 | ident.dword = readl(docptr + DoC_2k_CDSN_IO); |
384 | if (((ident.byte[0] << 8) | ident.byte[1]) == ret) { | |
63fa37f0 | 385 | pr_info("DiskOnChip 2000 responds to DWORD access\n"); |
fddf5cec | 386 | doc->supports_32b_reads = true; |
1da177e4 LT |
387 | } |
388 | } | |
61b03bd7 | 389 | |
1da177e4 LT |
390 | return ret; |
391 | } | |
392 | ||
393 | static void __init doc2000_count_chips(struct mtd_info *mtd) | |
394 | { | |
4bd4ebcc | 395 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 396 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
397 | uint16_t mfrid; |
398 | int i; | |
399 | ||
400 | /* Max 4 chips per floor on DiskOnChip 2000 */ | |
401 | doc->chips_per_floor = 4; | |
402 | ||
403 | /* Find out what the first chip is */ | |
404 | mfrid = doc200x_ident_chip(mtd, 0); | |
405 | ||
406 | /* Find how many chips in each floor. */ | |
407 | for (i = 1; i < 4; i++) { | |
408 | if (doc200x_ident_chip(mtd, i) != mfrid) | |
409 | break; | |
410 | } | |
411 | doc->chips_per_floor = i; | |
63fa37f0 | 412 | pr_debug("Detected %d chips per floor.\n", i); |
1da177e4 LT |
413 | } |
414 | ||
c0739d85 | 415 | static void doc2001_write_byte(struct nand_chip *this, u_char datum) |
1da177e4 | 416 | { |
d699ed25 | 417 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 418 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
419 | |
420 | WriteDOC(datum, docptr, CDSNSlowIO); | |
421 | WriteDOC(datum, docptr, Mil_CDSN_IO); | |
422 | WriteDOC(datum, docptr, WritePipeTerm); | |
423 | } | |
424 | ||
c0739d85 | 425 | static void doc2001_writebuf(struct nand_chip *this, const u_char *buf, int len) |
1da177e4 | 426 | { |
d699ed25 | 427 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 428 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
429 | int i; |
430 | ||
e0c7d767 | 431 | for (i = 0; i < len; i++) |
1da177e4 LT |
432 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
433 | /* Terminate write pipeline */ | |
434 | WriteDOC(0x00, docptr, WritePipeTerm); | |
435 | } | |
436 | ||
7e534323 | 437 | static void doc2001_readbuf(struct nand_chip *this, u_char *buf, int len) |
1da177e4 | 438 | { |
d699ed25 | 439 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 440 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
441 | int i; |
442 | ||
443 | /* Start read pipeline */ | |
444 | ReadDOC(docptr, ReadPipeInit); | |
445 | ||
e0c7d767 | 446 | for (i = 0; i < len - 1; i++) |
1da177e4 LT |
447 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO + (i & 0xff)); |
448 | ||
449 | /* Terminate read pipeline */ | |
450 | buf[i] = ReadDOC(docptr, LastDataRead); | |
451 | } | |
452 | ||
c0739d85 | 453 | static void doc2001plus_writebuf(struct nand_chip *this, const u_char *buf, int len) |
1da177e4 | 454 | { |
d699ed25 | 455 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 456 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
457 | int i; |
458 | ||
e0c7d767 DW |
459 | if (debug) |
460 | printk("writebuf of %d bytes: ", len); | |
461 | for (i = 0; i < len; i++) { | |
1da177e4 LT |
462 | WriteDOC_(buf[i], docptr, DoC_Mil_CDSN_IO + i); |
463 | if (debug && i < 16) | |
464 | printk("%02x ", buf[i]); | |
465 | } | |
e0c7d767 DW |
466 | if (debug) |
467 | printk("\n"); | |
1da177e4 LT |
468 | } |
469 | ||
7e534323 | 470 | static void doc2001plus_readbuf(struct nand_chip *this, u_char *buf, int len) |
1da177e4 | 471 | { |
d699ed25 | 472 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 473 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
474 | int i; |
475 | ||
e0c7d767 DW |
476 | if (debug) |
477 | printk("readbuf of %d bytes: ", len); | |
1da177e4 LT |
478 | |
479 | /* Start read pipeline */ | |
480 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
481 | ReadDOC(docptr, Mplus_ReadPipeInit); | |
482 | ||
e0c7d767 | 483 | for (i = 0; i < len - 2; i++) { |
1da177e4 LT |
484 | buf[i] = ReadDOC(docptr, Mil_CDSN_IO); |
485 | if (debug && i < 16) | |
486 | printk("%02x ", buf[i]); | |
487 | } | |
488 | ||
489 | /* Terminate read pipeline */ | |
a50b0c20 BB |
490 | if (len >= 2) { |
491 | buf[len - 2] = ReadDOC(docptr, Mplus_LastDataRead); | |
492 | if (debug && i < 16) | |
493 | printk("%02x ", buf[len - 2]); | |
494 | } | |
495 | ||
e0c7d767 | 496 | buf[len - 1] = ReadDOC(docptr, Mplus_LastDataRead); |
1da177e4 | 497 | if (debug && i < 16) |
e0c7d767 DW |
498 | printk("%02x ", buf[len - 1]); |
499 | if (debug) | |
500 | printk("\n"); | |
1da177e4 LT |
501 | } |
502 | ||
f46eb7af BB |
503 | static void doc200x_write_control(struct doc_priv *doc, u8 value) |
504 | { | |
505 | WriteDOC(value, doc->virtadr, CDSNControl); | |
506 | /* 11.4.3 -- 4 NOPs after CSDNControl write */ | |
507 | DoC_Delay(doc, 4); | |
508 | } | |
509 | ||
510 | static void doc200x_exec_instr(struct nand_chip *this, | |
511 | const struct nand_op_instr *instr) | |
512 | { | |
513 | struct doc_priv *doc = nand_get_controller_data(this); | |
514 | unsigned int i; | |
515 | ||
516 | switch (instr->type) { | |
517 | case NAND_OP_CMD_INSTR: | |
518 | doc200x_write_control(doc, CDSN_CTRL_CE | CDSN_CTRL_CLE); | |
519 | doc2000_write_byte(this, instr->ctx.cmd.opcode); | |
520 | break; | |
521 | ||
522 | case NAND_OP_ADDR_INSTR: | |
523 | doc200x_write_control(doc, CDSN_CTRL_CE | CDSN_CTRL_ALE); | |
524 | for (i = 0; i < instr->ctx.addr.naddrs; i++) { | |
525 | u8 addr = instr->ctx.addr.addrs[i]; | |
526 | ||
527 | if (DoC_is_2000(doc)) | |
528 | doc2000_write_byte(this, addr); | |
529 | else | |
530 | doc2001_write_byte(this, addr); | |
531 | } | |
532 | break; | |
533 | ||
534 | case NAND_OP_DATA_IN_INSTR: | |
535 | doc200x_write_control(doc, CDSN_CTRL_CE); | |
536 | if (DoC_is_2000(doc)) | |
537 | doc2000_readbuf(this, instr->ctx.data.buf.in, | |
538 | instr->ctx.data.len); | |
539 | else | |
540 | doc2001_readbuf(this, instr->ctx.data.buf.in, | |
541 | instr->ctx.data.len); | |
542 | break; | |
543 | ||
544 | case NAND_OP_DATA_OUT_INSTR: | |
545 | doc200x_write_control(doc, CDSN_CTRL_CE); | |
546 | if (DoC_is_2000(doc)) | |
547 | doc2000_writebuf(this, instr->ctx.data.buf.out, | |
548 | instr->ctx.data.len); | |
549 | else | |
550 | doc2001_writebuf(this, instr->ctx.data.buf.out, | |
551 | instr->ctx.data.len); | |
552 | break; | |
553 | ||
554 | case NAND_OP_WAITRDY_INSTR: | |
555 | DoC_WaitReady(doc); | |
556 | break; | |
557 | } | |
558 | ||
559 | if (instr->delay_ns) | |
560 | ndelay(instr->delay_ns); | |
561 | } | |
562 | ||
563 | static int doc200x_exec_op(struct nand_chip *this, | |
564 | const struct nand_operation *op, | |
565 | bool check_only) | |
566 | { | |
567 | struct doc_priv *doc = nand_get_controller_data(this); | |
568 | unsigned int i; | |
569 | ||
570 | if (check_only) | |
571 | return true; | |
572 | ||
573 | doc->curchip = op->cs % doc->chips_per_floor; | |
574 | doc->curfloor = op->cs / doc->chips_per_floor; | |
575 | ||
576 | WriteDOC(doc->curfloor, doc->virtadr, FloorSelect); | |
577 | WriteDOC(doc->curchip, doc->virtadr, CDSNDeviceSelect); | |
578 | ||
579 | /* Assert CE pin */ | |
580 | doc200x_write_control(doc, CDSN_CTRL_CE); | |
581 | ||
582 | for (i = 0; i < op->ninstrs; i++) | |
583 | doc200x_exec_instr(this, &op->instrs[i]); | |
584 | ||
585 | /* De-assert CE pin */ | |
586 | doc200x_write_control(doc, 0); | |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
591 | static void doc2001plus_write_pipe_term(struct doc_priv *doc) | |
592 | { | |
593 | WriteDOC(0x00, doc->virtadr, Mplus_WritePipeTerm); | |
594 | WriteDOC(0x00, doc->virtadr, Mplus_WritePipeTerm); | |
595 | } | |
596 | ||
597 | static void doc2001plus_exec_instr(struct nand_chip *this, | |
598 | const struct nand_op_instr *instr) | |
599 | { | |
600 | struct doc_priv *doc = nand_get_controller_data(this); | |
601 | unsigned int i; | |
602 | ||
603 | switch (instr->type) { | |
604 | case NAND_OP_CMD_INSTR: | |
605 | WriteDOC(instr->ctx.cmd.opcode, doc->virtadr, Mplus_FlashCmd); | |
606 | doc2001plus_write_pipe_term(doc); | |
607 | break; | |
608 | ||
609 | case NAND_OP_ADDR_INSTR: | |
610 | for (i = 0; i < instr->ctx.addr.naddrs; i++) { | |
611 | u8 addr = instr->ctx.addr.addrs[i]; | |
612 | ||
613 | WriteDOC(addr, doc->virtadr, Mplus_FlashAddress); | |
614 | } | |
615 | doc2001plus_write_pipe_term(doc); | |
616 | /* deassert ALE */ | |
617 | WriteDOC(0, doc->virtadr, Mplus_FlashControl); | |
618 | break; | |
619 | ||
620 | case NAND_OP_DATA_IN_INSTR: | |
621 | doc2001plus_readbuf(this, instr->ctx.data.buf.in, | |
622 | instr->ctx.data.len); | |
623 | break; | |
624 | case NAND_OP_DATA_OUT_INSTR: | |
625 | doc2001plus_writebuf(this, instr->ctx.data.buf.out, | |
626 | instr->ctx.data.len); | |
627 | doc2001plus_write_pipe_term(doc); | |
628 | break; | |
629 | case NAND_OP_WAITRDY_INSTR: | |
630 | DoC_WaitReady(doc); | |
631 | break; | |
632 | } | |
633 | ||
634 | if (instr->delay_ns) | |
635 | ndelay(instr->delay_ns); | |
636 | } | |
637 | ||
638 | static int doc2001plus_exec_op(struct nand_chip *this, | |
639 | const struct nand_operation *op, | |
640 | bool check_only) | |
641 | { | |
642 | struct doc_priv *doc = nand_get_controller_data(this); | |
643 | unsigned int i; | |
644 | ||
645 | if (check_only) | |
646 | return true; | |
647 | ||
648 | doc->curchip = op->cs % doc->chips_per_floor; | |
649 | doc->curfloor = op->cs / doc->chips_per_floor; | |
650 | ||
651 | /* Assert ChipEnable and deassert WriteProtect */ | |
652 | WriteDOC(DOC_FLASH_CE, doc->virtadr, Mplus_FlashSelect); | |
653 | ||
654 | for (i = 0; i < op->ninstrs; i++) | |
655 | doc2001plus_exec_instr(this, &op->instrs[i]); | |
656 | ||
657 | /* De-assert ChipEnable */ | |
658 | WriteDOC(0, doc->virtadr, Mplus_FlashSelect); | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
ec47636c | 663 | static void doc200x_enable_hwecc(struct nand_chip *this, int mode) |
1da177e4 | 664 | { |
d699ed25 | 665 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 666 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
667 | |
668 | /* Prime the ECC engine */ | |
e0c7d767 | 669 | switch (mode) { |
1da177e4 LT |
670 | case NAND_ECC_READ: |
671 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
672 | WriteDOC(DOC_ECC_EN, docptr, ECCConf); | |
673 | break; | |
674 | case NAND_ECC_WRITE: | |
675 | WriteDOC(DOC_ECC_RESET, docptr, ECCConf); | |
676 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); | |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
ec47636c | 681 | static void doc2001plus_enable_hwecc(struct nand_chip *this, int mode) |
1da177e4 | 682 | { |
d699ed25 | 683 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 684 | void __iomem *docptr = doc->virtadr; |
1da177e4 LT |
685 | |
686 | /* Prime the ECC engine */ | |
e0c7d767 | 687 | switch (mode) { |
1da177e4 LT |
688 | case NAND_ECC_READ: |
689 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
690 | WriteDOC(DOC_ECC_EN, docptr, Mplus_ECCConf); | |
691 | break; | |
692 | case NAND_ECC_WRITE: | |
693 | WriteDOC(DOC_ECC_RESET, docptr, Mplus_ECCConf); | |
694 | WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, Mplus_ECCConf); | |
695 | break; | |
696 | } | |
697 | } | |
698 | ||
699 | /* This code is only called on write */ | |
af37d2c3 BB |
700 | static int doc200x_calculate_ecc(struct nand_chip *this, const u_char *dat, |
701 | unsigned char *ecc_code) | |
1da177e4 | 702 | { |
d699ed25 | 703 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 704 | void __iomem *docptr = doc->virtadr; |
1da177e4 | 705 | int i; |
63c34f21 | 706 | int __always_unused emptymatch = 1; |
1da177e4 LT |
707 | |
708 | /* flush the pipeline */ | |
709 | if (DoC_is_2000(doc)) { | |
710 | WriteDOC(doc->CDSNControl & ~CDSN_CTRL_FLASH_IO, docptr, CDSNControl); | |
711 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
712 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
713 | WriteDOC(0, docptr, 2k_CDSN_IO); | |
714 | WriteDOC(doc->CDSNControl, docptr, CDSNControl); | |
715 | } else if (DoC_is_MillenniumPlus(doc)) { | |
716 | WriteDOC(0, docptr, Mplus_NOP); | |
717 | WriteDOC(0, docptr, Mplus_NOP); | |
718 | WriteDOC(0, docptr, Mplus_NOP); | |
719 | } else { | |
720 | WriteDOC(0, docptr, NOP); | |
721 | WriteDOC(0, docptr, NOP); | |
722 | WriteDOC(0, docptr, NOP); | |
723 | } | |
724 | ||
725 | for (i = 0; i < 6; i++) { | |
726 | if (DoC_is_MillenniumPlus(doc)) | |
727 | ecc_code[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
61b03bd7 | 728 | else |
1da177e4 LT |
729 | ecc_code[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); |
730 | if (ecc_code[i] != empty_write_ecc[i]) | |
731 | emptymatch = 0; | |
732 | } | |
733 | if (DoC_is_MillenniumPlus(doc)) | |
734 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
735 | else | |
736 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
737 | #if 0 | |
738 | /* If emptymatch=1, we might have an all-0xff data buffer. Check. */ | |
739 | if (emptymatch) { | |
740 | /* Note: this somewhat expensive test should not be triggered | |
741 | often. It could be optimized away by examining the data in | |
742 | the writebuf routine, and remembering the result. */ | |
743 | for (i = 0; i < 512; i++) { | |
e0c7d767 DW |
744 | if (dat[i] == 0xff) |
745 | continue; | |
1da177e4 LT |
746 | emptymatch = 0; |
747 | break; | |
748 | } | |
749 | } | |
750 | /* If emptymatch still =1, we do have an all-0xff data buffer. | |
751 | Return all-0xff ecc value instead of the computed one, so | |
752 | it'll look just like a freshly-erased page. */ | |
e0c7d767 DW |
753 | if (emptymatch) |
754 | memset(ecc_code, 0xff, 6); | |
1da177e4 LT |
755 | #endif |
756 | return 0; | |
757 | } | |
758 | ||
00da2ea9 | 759 | static int doc200x_correct_data(struct nand_chip *this, u_char *dat, |
f5bbdacc | 760 | u_char *read_ecc, u_char *isnull) |
1da177e4 LT |
761 | { |
762 | int i, ret = 0; | |
d699ed25 | 763 | struct doc_priv *doc = nand_get_controller_data(this); |
e0c7d767 | 764 | void __iomem *docptr = doc->virtadr; |
f5bbdacc | 765 | uint8_t calc_ecc[6]; |
1da177e4 | 766 | volatile u_char dummy; |
61b03bd7 | 767 | |
1da177e4 LT |
768 | /* flush the pipeline */ |
769 | if (DoC_is_2000(doc)) { | |
770 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
771 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
772 | dummy = ReadDOC(docptr, 2k_ECCStatus); | |
773 | } else if (DoC_is_MillenniumPlus(doc)) { | |
774 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
775 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
776 | dummy = ReadDOC(docptr, Mplus_ECCConf); | |
777 | } else { | |
778 | dummy = ReadDOC(docptr, ECCConf); | |
779 | dummy = ReadDOC(docptr, ECCConf); | |
780 | dummy = ReadDOC(docptr, ECCConf); | |
781 | } | |
61b03bd7 | 782 | |
25985edc | 783 | /* Error occurred ? */ |
1da177e4 LT |
784 | if (dummy & 0x80) { |
785 | for (i = 0; i < 6; i++) { | |
786 | if (DoC_is_MillenniumPlus(doc)) | |
787 | calc_ecc[i] = ReadDOC_(docptr, DoC_Mplus_ECCSyndrome0 + i); | |
788 | else | |
789 | calc_ecc[i] = ReadDOC_(docptr, DoC_ECCSyndrome0 + i); | |
1da177e4 | 790 | } |
cc01e607 | 791 | |
964dfce9 | 792 | ret = doc_ecc_decode(doc->rs_decoder, dat, calc_ecc); |
1da177e4 | 793 | if (ret > 0) |
63fa37f0 SP |
794 | pr_err("doc200x_correct_data corrected %d errors\n", |
795 | ret); | |
61b03bd7 | 796 | } |
1da177e4 LT |
797 | if (DoC_is_MillenniumPlus(doc)) |
798 | WriteDOC(DOC_ECC_DIS, docptr, Mplus_ECCConf); | |
799 | else | |
800 | WriteDOC(DOC_ECC_DIS, docptr, ECCConf); | |
d57f4054 | 801 | if (no_ecc_failures && mtd_is_eccerr(ret)) { |
63fa37f0 | 802 | pr_err("suppressing ECC failure\n"); |
1da177e4 LT |
803 | ret = 0; |
804 | } | |
805 | return ret; | |
806 | } | |
61b03bd7 | 807 | |
1da177e4 LT |
808 | //u_char mydatabuf[528]; |
809 | ||
68c1b754 BB |
810 | static int doc200x_ooblayout_ecc(struct mtd_info *mtd, int section, |
811 | struct mtd_oob_region *oobregion) | |
812 | { | |
813 | if (section) | |
814 | return -ERANGE; | |
815 | ||
816 | oobregion->offset = 0; | |
817 | oobregion->length = 6; | |
818 | ||
819 | return 0; | |
820 | } | |
821 | ||
822 | static int doc200x_ooblayout_free(struct mtd_info *mtd, int section, | |
823 | struct mtd_oob_region *oobregion) | |
824 | { | |
825 | if (section > 1) | |
826 | return -ERANGE; | |
827 | ||
828 | /* | |
829 | * The strange out-of-order free bytes definition is a (possibly | |
830 | * unneeded) attempt to retain compatibility. It used to read: | |
831 | * .oobfree = { {8, 8} } | |
832 | * Since that leaves two bytes unusable, it was changed. But the | |
833 | * following scheme might affect existing jffs2 installs by moving the | |
834 | * cleanmarker: | |
835 | * .oobfree = { {6, 10} } | |
836 | * jffs2 seems to handle the above gracefully, but the current scheme | |
837 | * seems safer. The only problem with it is that any code retrieving | |
838 | * free bytes position must be able to handle out-of-order segments. | |
839 | */ | |
840 | if (!section) { | |
841 | oobregion->offset = 8; | |
842 | oobregion->length = 8; | |
843 | } else { | |
844 | oobregion->offset = 6; | |
845 | oobregion->length = 2; | |
846 | } | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
851 | static const struct mtd_ooblayout_ops doc200x_ooblayout_ops = { | |
852 | .ecc = doc200x_ooblayout_ecc, | |
853 | .free = doc200x_ooblayout_free, | |
1da177e4 | 854 | }; |
61b03bd7 | 855 | |
1da177e4 | 856 | /* Find the (I)NFTL Media Header, and optionally also the mirror media header. |
af901ca1 | 857 | On successful return, buf will contain a copy of the media header for |
1da177e4 LT |
858 | further processing. id is the string to scan for, and will presumably be |
859 | either "ANAND" or "BNAND". If findmirror=1, also look for the mirror media | |
860 | header. The page #s of the found media headers are placed in mh0_page and | |
861 | mh1_page in the DOC private structure. */ | |
e0c7d767 | 862 | static int __init find_media_headers(struct mtd_info *mtd, u_char *buf, const char *id, int findmirror) |
1da177e4 | 863 | { |
4bd4ebcc | 864 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 865 | struct doc_priv *doc = nand_get_controller_data(this); |
1a78ff6b | 866 | unsigned offs; |
1da177e4 LT |
867 | int ret; |
868 | size_t retlen; | |
869 | ||
1a78ff6b | 870 | for (offs = 0; offs < mtd->size; offs += mtd->erasesize) { |
329ad399 | 871 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 872 | if (retlen != mtd->writesize) |
e0c7d767 | 873 | continue; |
1da177e4 | 874 | if (ret) { |
63fa37f0 | 875 | pr_warn("ECC error scanning DOC at 0x%x\n", offs); |
1da177e4 | 876 | } |
e0c7d767 DW |
877 | if (memcmp(buf, id, 6)) |
878 | continue; | |
63fa37f0 | 879 | pr_info("Found DiskOnChip %s Media Header at 0x%x\n", id, offs); |
1da177e4 LT |
880 | if (doc->mh0_page == -1) { |
881 | doc->mh0_page = offs >> this->page_shift; | |
e0c7d767 DW |
882 | if (!findmirror) |
883 | return 1; | |
1da177e4 LT |
884 | continue; |
885 | } | |
886 | doc->mh1_page = offs >> this->page_shift; | |
887 | return 2; | |
888 | } | |
889 | if (doc->mh0_page == -1) { | |
63fa37f0 | 890 | pr_warn("DiskOnChip %s Media Header not found.\n", id); |
1da177e4 LT |
891 | return 0; |
892 | } | |
893 | /* Only one mediaheader was found. We want buf to contain a | |
894 | mediaheader on return, so we'll have to re-read the one we found. */ | |
895 | offs = doc->mh0_page << this->page_shift; | |
329ad399 | 896 | ret = mtd_read(mtd, offs, mtd->writesize, &retlen, buf); |
28318776 | 897 | if (retlen != mtd->writesize) { |
1da177e4 | 898 | /* Insanity. Give up. */ |
63fa37f0 | 899 | pr_err("Read DiskOnChip Media Header once, but can't reread it???\n"); |
1da177e4 LT |
900 | return 0; |
901 | } | |
902 | return 1; | |
903 | } | |
904 | ||
e0c7d767 | 905 | static inline int __init nftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 | 906 | { |
4bd4ebcc | 907 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 908 | struct doc_priv *doc = nand_get_controller_data(this); |
629a442c | 909 | struct nand_memory_organization *memorg; |
1da177e4 LT |
910 | int ret = 0; |
911 | u_char *buf; | |
912 | struct NFTLMediaHeader *mh; | |
913 | const unsigned psize = 1 << this->page_shift; | |
1a78ff6b | 914 | int numparts = 0; |
1da177e4 LT |
915 | unsigned blocks, maxblocks; |
916 | int offs, numheaders; | |
917 | ||
629a442c BB |
918 | memorg = nanddev_get_memorg(&this->base); |
919 | ||
28318776 | 920 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 | 921 | if (!buf) { |
1da177e4 LT |
922 | return 0; |
923 | } | |
e0c7d767 DW |
924 | if (!(numheaders = find_media_headers(mtd, buf, "ANAND", 1))) |
925 | goto out; | |
926 | mh = (struct NFTLMediaHeader *)buf; | |
1da177e4 | 927 | |
96372446 HH |
928 | le16_to_cpus(&mh->NumEraseUnits); |
929 | le16_to_cpus(&mh->FirstPhysicalEUN); | |
930 | le32_to_cpus(&mh->FormattedSize); | |
f29a4b86 | 931 | |
63fa37f0 SP |
932 | pr_info(" DataOrgID = %s\n" |
933 | " NumEraseUnits = %d\n" | |
934 | " FirstPhysicalEUN = %d\n" | |
935 | " FormattedSize = %d\n" | |
936 | " UnitSizeFactor = %d\n", | |
1da177e4 LT |
937 | mh->DataOrgID, mh->NumEraseUnits, |
938 | mh->FirstPhysicalEUN, mh->FormattedSize, | |
939 | mh->UnitSizeFactor); | |
1da177e4 LT |
940 | |
941 | blocks = mtd->size >> this->phys_erase_shift; | |
942 | maxblocks = min(32768U, mtd->erasesize - psize); | |
943 | ||
944 | if (mh->UnitSizeFactor == 0x00) { | |
945 | /* Auto-determine UnitSizeFactor. The constraints are: | |
946 | - There can be at most 32768 virtual blocks. | |
947 | - There can be at most (virtual block size - page size) | |
e0c7d767 DW |
948 | virtual blocks (because MediaHeader+BBT must fit in 1). |
949 | */ | |
1da177e4 LT |
950 | mh->UnitSizeFactor = 0xff; |
951 | while (blocks > maxblocks) { | |
952 | blocks >>= 1; | |
953 | maxblocks = min(32768U, (maxblocks << 1) + psize); | |
954 | mh->UnitSizeFactor--; | |
955 | } | |
63fa37f0 | 956 | pr_warn("UnitSizeFactor=0x00 detected. Correct value is assumed to be 0x%02x.\n", mh->UnitSizeFactor); |
1da177e4 LT |
957 | } |
958 | ||
959 | /* NOTE: The lines below modify internal variables of the NAND and MTD | |
960 | layers; variables with have already been configured by nand_scan. | |
961 | Unfortunately, we didn't know before this point what these values | |
25985edc | 962 | should be. Thus, this code is somewhat dependent on the exact |
1da177e4 LT |
963 | implementation of the NAND layer. */ |
964 | if (mh->UnitSizeFactor != 0xff) { | |
965 | this->bbt_erase_shift += (0xff - mh->UnitSizeFactor); | |
629a442c | 966 | memorg->pages_per_eraseblock <<= (0xff - mh->UnitSizeFactor); |
1da177e4 | 967 | mtd->erasesize <<= (0xff - mh->UnitSizeFactor); |
63fa37f0 | 968 | pr_info("Setting virtual erase size to %d\n", mtd->erasesize); |
1da177e4 LT |
969 | blocks = mtd->size >> this->bbt_erase_shift; |
970 | maxblocks = min(32768U, mtd->erasesize - psize); | |
971 | } | |
972 | ||
973 | if (blocks > maxblocks) { | |
63fa37f0 | 974 | pr_err("UnitSizeFactor of 0x%02x is inconsistent with device size. Aborting.\n", mh->UnitSizeFactor); |
1da177e4 LT |
975 | goto out; |
976 | } | |
977 | ||
978 | /* Skip past the media headers. */ | |
979 | offs = max(doc->mh0_page, doc->mh1_page); | |
980 | offs <<= this->page_shift; | |
981 | offs += mtd->erasesize; | |
982 | ||
1a78ff6b DB |
983 | if (show_firmware_partition == 1) { |
984 | parts[0].name = " DiskOnChip Firmware / Media Header partition"; | |
985 | parts[0].offset = 0; | |
986 | parts[0].size = offs; | |
987 | numparts = 1; | |
988 | } | |
989 | ||
990 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
991 | parts[numparts].offset = offs; | |
992 | parts[numparts].size = (mh->NumEraseUnits - numheaders) << this->bbt_erase_shift; | |
993 | ||
994 | offs += parts[numparts].size; | |
995 | numparts++; | |
1da177e4 | 996 | |
1da177e4 | 997 | if (offs < mtd->size) { |
1a78ff6b DB |
998 | parts[numparts].name = " DiskOnChip Remainder partition"; |
999 | parts[numparts].offset = offs; | |
1000 | parts[numparts].size = mtd->size - offs; | |
1001 | numparts++; | |
1da177e4 | 1002 | } |
1a78ff6b DB |
1003 | |
1004 | ret = numparts; | |
e0c7d767 | 1005 | out: |
1da177e4 LT |
1006 | kfree(buf); |
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | /* This is a stripped-down copy of the code in inftlmount.c */ | |
e0c7d767 | 1011 | static inline int __init inftl_partscan(struct mtd_info *mtd, struct mtd_partition *parts) |
1da177e4 | 1012 | { |
4bd4ebcc | 1013 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1014 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
1015 | int ret = 0; |
1016 | u_char *buf; | |
1017 | struct INFTLMediaHeader *mh; | |
1018 | struct INFTLPartition *ip; | |
1019 | int numparts = 0; | |
1020 | int blocks; | |
1021 | int vshift, lastvunit = 0; | |
1022 | int i; | |
1023 | int end = mtd->size; | |
1024 | ||
1025 | if (inftl_bbt_write) | |
1026 | end -= (INFTL_BBT_RESERVED_BLOCKS << this->phys_erase_shift); | |
1027 | ||
28318776 | 1028 | buf = kmalloc(mtd->writesize, GFP_KERNEL); |
1da177e4 | 1029 | if (!buf) { |
1da177e4 LT |
1030 | return 0; |
1031 | } | |
1032 | ||
e0c7d767 DW |
1033 | if (!find_media_headers(mtd, buf, "BNAND", 0)) |
1034 | goto out; | |
1da177e4 | 1035 | doc->mh1_page = doc->mh0_page + (4096 >> this->page_shift); |
e0c7d767 | 1036 | mh = (struct INFTLMediaHeader *)buf; |
1da177e4 | 1037 | |
96372446 HH |
1038 | le32_to_cpus(&mh->NoOfBootImageBlocks); |
1039 | le32_to_cpus(&mh->NoOfBinaryPartitions); | |
1040 | le32_to_cpus(&mh->NoOfBDTLPartitions); | |
1041 | le32_to_cpus(&mh->BlockMultiplierBits); | |
1042 | le32_to_cpus(&mh->FormatFlags); | |
1043 | le32_to_cpus(&mh->PercentUsed); | |
61b03bd7 | 1044 | |
63fa37f0 SP |
1045 | pr_info(" bootRecordID = %s\n" |
1046 | " NoOfBootImageBlocks = %d\n" | |
1047 | " NoOfBinaryPartitions = %d\n" | |
1048 | " NoOfBDTLPartitions = %d\n" | |
13a96466 | 1049 | " BlockMultiplierBits = %d\n" |
63fa37f0 SP |
1050 | " FormatFlgs = %d\n" |
1051 | " OsakVersion = %d.%d.%d.%d\n" | |
1052 | " PercentUsed = %d\n", | |
1da177e4 LT |
1053 | mh->bootRecordID, mh->NoOfBootImageBlocks, |
1054 | mh->NoOfBinaryPartitions, | |
1055 | mh->NoOfBDTLPartitions, | |
1056 | mh->BlockMultiplierBits, mh->FormatFlags, | |
1057 | ((unsigned char *) &mh->OsakVersion)[0] & 0xf, | |
1058 | ((unsigned char *) &mh->OsakVersion)[1] & 0xf, | |
1059 | ((unsigned char *) &mh->OsakVersion)[2] & 0xf, | |
1060 | ((unsigned char *) &mh->OsakVersion)[3] & 0xf, | |
1061 | mh->PercentUsed); | |
1da177e4 LT |
1062 | |
1063 | vshift = this->phys_erase_shift + mh->BlockMultiplierBits; | |
1064 | ||
1065 | blocks = mtd->size >> vshift; | |
1066 | if (blocks > 32768) { | |
63fa37f0 | 1067 | pr_err("BlockMultiplierBits=%d is inconsistent with device size. Aborting.\n", mh->BlockMultiplierBits); |
1da177e4 LT |
1068 | goto out; |
1069 | } | |
1070 | ||
1071 | blocks = doc->chips_per_floor << (this->chip_shift - this->phys_erase_shift); | |
1072 | if (inftl_bbt_write && (blocks > mtd->erasesize)) { | |
63fa37f0 | 1073 | pr_err("Writeable BBTs spanning more than one erase block are not yet supported. FIX ME!\n"); |
1da177e4 LT |
1074 | goto out; |
1075 | } | |
1076 | ||
1077 | /* Scan the partitions */ | |
1078 | for (i = 0; (i < 4); i++) { | |
1079 | ip = &(mh->Partitions[i]); | |
96372446 HH |
1080 | le32_to_cpus(&ip->virtualUnits); |
1081 | le32_to_cpus(&ip->firstUnit); | |
1082 | le32_to_cpus(&ip->lastUnit); | |
1083 | le32_to_cpus(&ip->flags); | |
1084 | le32_to_cpus(&ip->spareUnits); | |
1085 | le32_to_cpus(&ip->Reserved0); | |
1da177e4 | 1086 | |
63fa37f0 | 1087 | pr_info(" PARTITION[%d] ->\n" |
1da177e4 LT |
1088 | " virtualUnits = %d\n" |
1089 | " firstUnit = %d\n" | |
1090 | " lastUnit = %d\n" | |
1091 | " flags = 0x%x\n" | |
1092 | " spareUnits = %d\n", | |
1093 | i, ip->virtualUnits, ip->firstUnit, | |
1094 | ip->lastUnit, ip->flags, | |
1095 | ip->spareUnits); | |
1da177e4 | 1096 | |
1a78ff6b DB |
1097 | if ((show_firmware_partition == 1) && |
1098 | (i == 0) && (ip->firstUnit > 0)) { | |
1da177e4 LT |
1099 | parts[0].name = " DiskOnChip IPL / Media Header partition"; |
1100 | parts[0].offset = 0; | |
1101 | parts[0].size = mtd->erasesize * ip->firstUnit; | |
1102 | numparts = 1; | |
1103 | } | |
1da177e4 LT |
1104 | |
1105 | if (ip->flags & INFTL_BINARY) | |
1106 | parts[numparts].name = " DiskOnChip BDK partition"; | |
1107 | else | |
1108 | parts[numparts].name = " DiskOnChip BDTL partition"; | |
1109 | parts[numparts].offset = ip->firstUnit << vshift; | |
1110 | parts[numparts].size = (1 + ip->lastUnit - ip->firstUnit) << vshift; | |
1111 | numparts++; | |
e0c7d767 DW |
1112 | if (ip->lastUnit > lastvunit) |
1113 | lastvunit = ip->lastUnit; | |
1114 | if (ip->flags & INFTL_LAST) | |
1115 | break; | |
1da177e4 LT |
1116 | } |
1117 | lastvunit++; | |
1118 | if ((lastvunit << vshift) < end) { | |
1119 | parts[numparts].name = " DiskOnChip Remainder partition"; | |
1120 | parts[numparts].offset = lastvunit << vshift; | |
1121 | parts[numparts].size = end - parts[numparts].offset; | |
1122 | numparts++; | |
1123 | } | |
1124 | ret = numparts; | |
e0c7d767 | 1125 | out: |
1da177e4 LT |
1126 | kfree(buf); |
1127 | return ret; | |
1128 | } | |
1129 | ||
1130 | static int __init nftl_scan_bbt(struct mtd_info *mtd) | |
1131 | { | |
1132 | int ret, numparts; | |
4bd4ebcc | 1133 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1134 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
1135 | struct mtd_partition parts[2]; |
1136 | ||
e0c7d767 | 1137 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1138 | /* On NFTL, we have to find the media headers before we can read the |
1139 | BBTs, since they're stored in the media header eraseblocks. */ | |
1140 | numparts = nftl_partscan(mtd, parts); | |
e0c7d767 DW |
1141 | if (!numparts) |
1142 | return -EIO; | |
1da177e4 LT |
1143 | this->bbt_td->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | |
1144 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1145 | NAND_BBT_VERSION; | |
1146 | this->bbt_td->veroffs = 7; | |
1147 | this->bbt_td->pages[0] = doc->mh0_page + 1; | |
1148 | if (doc->mh1_page != -1) { | |
1149 | this->bbt_md->options = NAND_BBT_ABSPAGE | NAND_BBT_8BIT | | |
1150 | NAND_BBT_SAVECONTENT | NAND_BBT_WRITE | | |
1151 | NAND_BBT_VERSION; | |
1152 | this->bbt_md->veroffs = 7; | |
1153 | this->bbt_md->pages[0] = doc->mh1_page + 1; | |
1154 | } else { | |
1155 | this->bbt_md = NULL; | |
1156 | } | |
1157 | ||
e80eba75 | 1158 | ret = nand_create_bbt(this); |
d24fe0c3 | 1159 | if (ret) |
1da177e4 | 1160 | return ret; |
d24fe0c3 | 1161 | |
6a7c7334 | 1162 | return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts); |
1da177e4 LT |
1163 | } |
1164 | ||
1165 | static int __init inftl_scan_bbt(struct mtd_info *mtd) | |
1166 | { | |
1167 | int ret, numparts; | |
4bd4ebcc | 1168 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1169 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 LT |
1170 | struct mtd_partition parts[5]; |
1171 | ||
32813e28 | 1172 | if (nanddev_ntargets(&this->base) > doc->chips_per_floor) { |
63fa37f0 | 1173 | pr_err("Multi-floor INFTL devices not yet supported.\n"); |
1da177e4 LT |
1174 | return -EIO; |
1175 | } | |
1176 | ||
1177 | if (DoC_is_MillenniumPlus(doc)) { | |
1178 | this->bbt_td->options = NAND_BBT_2BIT | NAND_BBT_ABSPAGE; | |
1179 | if (inftl_bbt_write) | |
1180 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1181 | this->bbt_td->pages[0] = 2; | |
1182 | this->bbt_md = NULL; | |
1183 | } else { | |
e0c7d767 | 1184 | this->bbt_td->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1185 | if (inftl_bbt_write) |
1186 | this->bbt_td->options |= NAND_BBT_WRITE; | |
1187 | this->bbt_td->offs = 8; | |
1188 | this->bbt_td->len = 8; | |
1189 | this->bbt_td->veroffs = 7; | |
1190 | this->bbt_td->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1191 | this->bbt_td->reserved_block_code = 0x01; | |
1192 | this->bbt_td->pattern = "MSYS_BBT"; | |
1193 | ||
e0c7d767 | 1194 | this->bbt_md->options = NAND_BBT_LASTBLOCK | NAND_BBT_8BIT | NAND_BBT_VERSION; |
1da177e4 LT |
1195 | if (inftl_bbt_write) |
1196 | this->bbt_md->options |= NAND_BBT_WRITE; | |
1197 | this->bbt_md->offs = 8; | |
1198 | this->bbt_md->len = 8; | |
1199 | this->bbt_md->veroffs = 7; | |
1200 | this->bbt_md->maxblocks = INFTL_BBT_RESERVED_BLOCKS; | |
1201 | this->bbt_md->reserved_block_code = 0x01; | |
1202 | this->bbt_md->pattern = "TBB_SYSM"; | |
1203 | } | |
1204 | ||
e80eba75 | 1205 | ret = nand_create_bbt(this); |
d24fe0c3 | 1206 | if (ret) |
1da177e4 | 1207 | return ret; |
d24fe0c3 | 1208 | |
e0c7d767 | 1209 | memset((char *)parts, 0, sizeof(parts)); |
1da177e4 LT |
1210 | numparts = inftl_partscan(mtd, parts); |
1211 | /* At least for now, require the INFTL Media Header. We could probably | |
1212 | do without it for non-INFTL use, since all it gives us is | |
1213 | autopartitioning, but I want to give it more thought. */ | |
e0c7d767 DW |
1214 | if (!numparts) |
1215 | return -EIO; | |
6a7c7334 | 1216 | return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts); |
1da177e4 LT |
1217 | } |
1218 | ||
1219 | static inline int __init doc2000_init(struct mtd_info *mtd) | |
1220 | { | |
4bd4ebcc | 1221 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1222 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 | 1223 | |
d24fe0c3 | 1224 | doc->late_init = nftl_scan_bbt; |
1da177e4 LT |
1225 | |
1226 | doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO; | |
1227 | doc2000_count_chips(mtd); | |
1228 | mtd->name = "DiskOnChip 2000 (NFTL Model)"; | |
1229 | return (4 * doc->chips_per_floor); | |
1230 | } | |
1231 | ||
1232 | static inline int __init doc2001_init(struct mtd_info *mtd) | |
1233 | { | |
4bd4ebcc | 1234 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1235 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 | 1236 | |
1da177e4 LT |
1237 | ReadDOC(doc->virtadr, ChipID); |
1238 | ReadDOC(doc->virtadr, ChipID); | |
1239 | ReadDOC(doc->virtadr, ChipID); | |
1240 | if (ReadDOC(doc->virtadr, ChipID) != DOC_ChipID_DocMil) { | |
1241 | /* It's not a Millennium; it's one of the newer | |
61b03bd7 | 1242 | DiskOnChip 2000 units with a similar ASIC. |
1da177e4 LT |
1243 | Treat it like a Millennium, except that it |
1244 | can have multiple chips. */ | |
1245 | doc2000_count_chips(mtd); | |
1246 | mtd->name = "DiskOnChip 2000 (INFTL Model)"; | |
d24fe0c3 | 1247 | doc->late_init = inftl_scan_bbt; |
1da177e4 LT |
1248 | return (4 * doc->chips_per_floor); |
1249 | } else { | |
1250 | /* Bog-standard Millennium */ | |
1251 | doc->chips_per_floor = 1; | |
1252 | mtd->name = "DiskOnChip Millennium"; | |
d24fe0c3 | 1253 | doc->late_init = nftl_scan_bbt; |
1da177e4 LT |
1254 | return 1; |
1255 | } | |
1256 | } | |
1257 | ||
1258 | static inline int __init doc2001plus_init(struct mtd_info *mtd) | |
1259 | { | |
4bd4ebcc | 1260 | struct nand_chip *this = mtd_to_nand(mtd); |
d699ed25 | 1261 | struct doc_priv *doc = nand_get_controller_data(this); |
1da177e4 | 1262 | |
d24fe0c3 | 1263 | doc->late_init = inftl_scan_bbt; |
0cddd6c2 | 1264 | this->ecc.hwctl = doc2001plus_enable_hwecc; |
1da177e4 LT |
1265 | |
1266 | doc->chips_per_floor = 1; | |
1267 | mtd->name = "DiskOnChip Millennium Plus"; | |
1268 | ||
1269 | return 1; | |
1270 | } | |
1271 | ||
7f4ea034 MR |
1272 | static int doc200x_attach_chip(struct nand_chip *chip) |
1273 | { | |
1274 | if (chip->ecc.engine_type != NAND_ECC_ENGINE_TYPE_ON_HOST) | |
1275 | return 0; | |
1276 | ||
1277 | chip->ecc.placement = NAND_ECC_PLACEMENT_INTERLEAVED; | |
1278 | chip->ecc.size = 512; | |
1279 | chip->ecc.bytes = 6; | |
1280 | chip->ecc.strength = 2; | |
1281 | chip->ecc.options = NAND_ECC_GENERIC_ERASED_CHECK; | |
1282 | chip->ecc.hwctl = doc200x_enable_hwecc; | |
1283 | chip->ecc.calculate = doc200x_calculate_ecc; | |
1284 | chip->ecc.correct = doc200x_correct_data; | |
1285 | ||
1286 | return 0; | |
1287 | } | |
1288 | ||
f46eb7af BB |
1289 | static const struct nand_controller_ops doc200x_ops = { |
1290 | .exec_op = doc200x_exec_op, | |
7f4ea034 | 1291 | .attach_chip = doc200x_attach_chip, |
f46eb7af BB |
1292 | }; |
1293 | ||
1294 | static const struct nand_controller_ops doc2001plus_ops = { | |
1295 | .exec_op = doc2001plus_exec_op, | |
7f4ea034 | 1296 | .attach_chip = doc200x_attach_chip, |
f46eb7af BB |
1297 | }; |
1298 | ||
858119e1 | 1299 | static int __init doc_probe(unsigned long physadr) |
1da177e4 | 1300 | { |
964dfce9 TG |
1301 | struct nand_chip *nand = NULL; |
1302 | struct doc_priv *doc = NULL; | |
1da177e4 LT |
1303 | unsigned char ChipID; |
1304 | struct mtd_info *mtd; | |
1da177e4 LT |
1305 | void __iomem *virtadr; |
1306 | unsigned char save_control; | |
1307 | unsigned char tmp, tmpb, tmpc; | |
1308 | int reg, len, numchips; | |
1309 | int ret = 0; | |
1310 | ||
86e4bbc7 | 1311 | if (!request_mem_region(physadr, DOC_IOREMAP_LEN, "DiskOnChip")) |
4f0614a0 | 1312 | return -EBUSY; |
1da177e4 LT |
1313 | virtadr = ioremap(physadr, DOC_IOREMAP_LEN); |
1314 | if (!virtadr) { | |
63fa37f0 SP |
1315 | pr_err("Diskonchip ioremap failed: 0x%x bytes at 0x%lx\n", |
1316 | DOC_IOREMAP_LEN, physadr); | |
4f0614a0 AS |
1317 | ret = -EIO; |
1318 | goto error_ioremap; | |
1da177e4 LT |
1319 | } |
1320 | ||
1321 | /* It's not possible to cleanly detect the DiskOnChip - the | |
1322 | * bootup procedure will put the device into reset mode, and | |
1323 | * it's not possible to talk to it without actually writing | |
1324 | * to the DOCControl register. So we store the current contents | |
1325 | * of the DOCControl register's location, in case we later decide | |
1326 | * that it's not a DiskOnChip, and want to put it back how we | |
61b03bd7 | 1327 | * found it. |
1da177e4 LT |
1328 | */ |
1329 | save_control = ReadDOC(virtadr, DOCControl); | |
1330 | ||
1331 | /* Reset the DiskOnChip ASIC */ | |
e0c7d767 DW |
1332 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); |
1333 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, virtadr, DOCControl); | |
1da177e4 LT |
1334 | |
1335 | /* Enable the DiskOnChip ASIC */ | |
e0c7d767 DW |
1336 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); |
1337 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, virtadr, DOCControl); | |
1da177e4 LT |
1338 | |
1339 | ChipID = ReadDOC(virtadr, ChipID); | |
1340 | ||
e0c7d767 | 1341 | switch (ChipID) { |
1da177e4 LT |
1342 | case DOC_ChipID_Doc2k: |
1343 | reg = DoC_2k_ECCStatus; | |
1344 | break; | |
1345 | case DOC_ChipID_DocMil: | |
1346 | reg = DoC_ECCConf; | |
1347 | break; | |
1348 | case DOC_ChipID_DocMilPlus16: | |
1349 | case DOC_ChipID_DocMilPlus32: | |
1350 | case 0: | |
1351 | /* Possible Millennium Plus, need to do more checks */ | |
1352 | /* Possibly release from power down mode */ | |
1353 | for (tmp = 0; (tmp < 4); tmp++) | |
1354 | ReadDOC(virtadr, Mplus_Power); | |
1355 | ||
1356 | /* Reset the Millennium Plus ASIC */ | |
e0c7d767 | 1357 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1358 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1359 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
1360 | ||
7b4b1994 | 1361 | usleep_range(1000, 2000); |
1da177e4 | 1362 | /* Enable the Millennium Plus ASIC */ |
e0c7d767 | 1363 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | DOC_MODE_BDECT; |
1da177e4 LT |
1364 | WriteDOC(tmp, virtadr, Mplus_DOCControl); |
1365 | WriteDOC(~tmp, virtadr, Mplus_CtrlConfirm); | |
7b4b1994 | 1366 | usleep_range(1000, 2000); |
1da177e4 LT |
1367 | |
1368 | ChipID = ReadDOC(virtadr, ChipID); | |
1369 | ||
1370 | switch (ChipID) { | |
1371 | case DOC_ChipID_DocMilPlus16: | |
1372 | reg = DoC_Mplus_Toggle; | |
1373 | break; | |
1374 | case DOC_ChipID_DocMilPlus32: | |
63fa37f0 | 1375 | pr_err("DiskOnChip Millennium Plus 32MB is not supported, ignoring.\n"); |
025a06c1 | 1376 | fallthrough; |
1da177e4 LT |
1377 | default: |
1378 | ret = -ENODEV; | |
1379 | goto notfound; | |
1380 | } | |
1381 | break; | |
1382 | ||
1383 | default: | |
1384 | ret = -ENODEV; | |
1385 | goto notfound; | |
1386 | } | |
1387 | /* Check the TOGGLE bit in the ECC register */ | |
e0c7d767 | 1388 | tmp = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1da177e4 LT |
1389 | tmpb = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; |
1390 | tmpc = ReadDOC_(virtadr, reg) & DOC_TOGGLE_BIT; | |
1391 | if ((tmp == tmpb) || (tmp != tmpc)) { | |
63fa37f0 | 1392 | pr_warn("Possible DiskOnChip at 0x%lx failed TOGGLE test, dropping.\n", physadr); |
1da177e4 LT |
1393 | ret = -ENODEV; |
1394 | goto notfound; | |
1395 | } | |
1396 | ||
1397 | for (mtd = doclist; mtd; mtd = doc->nextdoc) { | |
1398 | unsigned char oldval; | |
1399 | unsigned char newval; | |
4bd4ebcc | 1400 | nand = mtd_to_nand(mtd); |
d699ed25 | 1401 | doc = nand_get_controller_data(nand); |
1da177e4 LT |
1402 | /* Use the alias resolution register to determine if this is |
1403 | in fact the same DOC aliased to a new address. If writes | |
1404 | to one chip's alias resolution register change the value on | |
1405 | the other chip, they're the same chip. */ | |
1406 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1407 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
1408 | newval = ReadDOC(virtadr, Mplus_AliasResolution); | |
1409 | } else { | |
1410 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
1411 | newval = ReadDOC(virtadr, AliasResolution); | |
1412 | } | |
1413 | if (oldval != newval) | |
1414 | continue; | |
1415 | if (ChipID == DOC_ChipID_DocMilPlus16) { | |
1416 | WriteDOC(~newval, virtadr, Mplus_AliasResolution); | |
1417 | oldval = ReadDOC(doc->virtadr, Mplus_AliasResolution); | |
e0c7d767 | 1418 | WriteDOC(newval, virtadr, Mplus_AliasResolution); // restore it |
1da177e4 LT |
1419 | } else { |
1420 | WriteDOC(~newval, virtadr, AliasResolution); | |
1421 | oldval = ReadDOC(doc->virtadr, AliasResolution); | |
e0c7d767 | 1422 | WriteDOC(newval, virtadr, AliasResolution); // restore it |
1da177e4 LT |
1423 | } |
1424 | newval = ~newval; | |
1425 | if (oldval == newval) { | |
63fa37f0 SP |
1426 | pr_debug("Found alias of DOC at 0x%lx to 0x%lx\n", |
1427 | doc->physadr, physadr); | |
1da177e4 LT |
1428 | goto notfound; |
1429 | } | |
1430 | } | |
1431 | ||
63fa37f0 | 1432 | pr_notice("DiskOnChip found at 0x%lx\n", physadr); |
1da177e4 | 1433 | |
b0c423c7 BB |
1434 | len = sizeof(struct nand_chip) + sizeof(struct doc_priv) + |
1435 | (2 * sizeof(struct nand_bbt_descr)); | |
1436 | nand = kzalloc(len, GFP_KERNEL); | |
1437 | if (!nand) { | |
1da177e4 LT |
1438 | ret = -ENOMEM; |
1439 | goto fail; | |
1440 | } | |
1da177e4 | 1441 | |
964dfce9 TG |
1442 | /* |
1443 | * Allocate a RS codec instance | |
1444 | * | |
1445 | * Symbolsize is 10 (bits) | |
1446 | * Primitve polynomial is x^10+x^3+1 | |
1447 | * First consecutive root is 510 | |
1448 | * Primitve element to generate roots = 1 | |
1449 | * Generator polinomial degree = 4 | |
1450 | */ | |
1451 | doc = (struct doc_priv *) (nand + 1); | |
1452 | doc->rs_decoder = init_rs(10, 0x409, FCR, 1, NROOTS); | |
1453 | if (!doc->rs_decoder) { | |
1454 | pr_err("DiskOnChip: Could not create a RS codec\n"); | |
1455 | ret = -ENOMEM; | |
1456 | goto fail; | |
1457 | } | |
1458 | ||
f37b1d3c | 1459 | nand_controller_init(&doc->base); |
f46eb7af BB |
1460 | if (ChipID == DOC_ChipID_DocMilPlus16) |
1461 | doc->base.ops = &doc2001plus_ops; | |
1462 | else | |
1463 | doc->base.ops = &doc200x_ops; | |
1464 | ||
b0c423c7 | 1465 | mtd = nand_to_mtd(nand); |
1da177e4 LT |
1466 | nand->bbt_td = (struct nand_bbt_descr *) (doc + 1); |
1467 | nand->bbt_md = nand->bbt_td + 1; | |
1468 | ||
1da177e4 | 1469 | mtd->owner = THIS_MODULE; |
68c1b754 | 1470 | mtd_set_ooblayout(mtd, &doc200x_ooblayout_ops); |
1da177e4 | 1471 | |
f37b1d3c | 1472 | nand->controller = &doc->base; |
d699ed25 | 1473 | nand_set_controller_data(nand, doc); |
bb9ebd4e | 1474 | nand->bbt_options = NAND_BBT_USE_FLASH; |
d24fe0c3 | 1475 | /* Skip the automatic BBT scan so we can run it manually */ |
dace12cc | 1476 | nand->options |= NAND_SKIP_BBTSCAN | NAND_NO_BBM_QUIRK; |
1da177e4 LT |
1477 | |
1478 | doc->physadr = physadr; | |
1479 | doc->virtadr = virtadr; | |
1480 | doc->ChipID = ChipID; | |
1481 | doc->curfloor = -1; | |
1482 | doc->curchip = -1; | |
1483 | doc->mh0_page = -1; | |
1484 | doc->mh1_page = -1; | |
1485 | doc->nextdoc = doclist; | |
1486 | ||
1487 | if (ChipID == DOC_ChipID_Doc2k) | |
1488 | numchips = doc2000_init(mtd); | |
1489 | else if (ChipID == DOC_ChipID_DocMilPlus16) | |
1490 | numchips = doc2001plus_init(mtd); | |
1491 | else | |
1492 | numchips = doc2001_init(mtd); | |
1493 | ||
2b8aa4c3 DL |
1494 | ret = nand_scan(nand, numchips); |
1495 | if (ret) | |
1496 | goto fail; | |
1497 | ||
1498 | ret = doc->late_init(mtd); | |
1499 | if (ret) { | |
c5be12e4 | 1500 | nand_cleanup(nand); |
1da177e4 LT |
1501 | goto fail; |
1502 | } | |
1503 | ||
1504 | /* Success! */ | |
1505 | doclist = mtd; | |
1506 | return 0; | |
1507 | ||
e0c7d767 | 1508 | notfound: |
1da177e4 LT |
1509 | /* Put back the contents of the DOCControl register, in case it's not |
1510 | actually a DiskOnChip. */ | |
1511 | WriteDOC(save_control, virtadr, DOCControl); | |
e0c7d767 | 1512 | fail: |
964dfce9 TG |
1513 | if (doc) |
1514 | free_rs(doc->rs_decoder); | |
1515 | kfree(nand); | |
1da177e4 | 1516 | iounmap(virtadr); |
4f0614a0 AS |
1517 | |
1518 | error_ioremap: | |
1519 | release_mem_region(physadr, DOC_IOREMAP_LEN); | |
1520 | ||
1da177e4 LT |
1521 | return ret; |
1522 | } | |
1523 | ||
1524 | static void release_nanddoc(void) | |
1525 | { | |
e0c7d767 | 1526 | struct mtd_info *mtd, *nextmtd; |
1da177e4 LT |
1527 | struct nand_chip *nand; |
1528 | struct doc_priv *doc; | |
63a14607 | 1529 | int ret; |
1da177e4 LT |
1530 | |
1531 | for (mtd = doclist; mtd; mtd = nextmtd) { | |
4bd4ebcc | 1532 | nand = mtd_to_nand(mtd); |
d699ed25 | 1533 | doc = nand_get_controller_data(nand); |
1da177e4 LT |
1534 | |
1535 | nextmtd = doc->nextdoc; | |
63a14607 MR |
1536 | ret = mtd_device_unregister(mtd); |
1537 | WARN_ON(ret); | |
1538 | nand_cleanup(nand); | |
1da177e4 | 1539 | iounmap(doc->virtadr); |
4f0614a0 | 1540 | release_mem_region(doc->physadr, DOC_IOREMAP_LEN); |
964dfce9 | 1541 | free_rs(doc->rs_decoder); |
b0c423c7 | 1542 | kfree(nand); |
1da177e4 LT |
1543 | } |
1544 | } | |
1545 | ||
1546 | static int __init init_nanddoc(void) | |
1547 | { | |
1548 | int i, ret = 0; | |
1549 | ||
1da177e4 | 1550 | if (doc_config_location) { |
63fa37f0 SP |
1551 | pr_info("Using configured DiskOnChip probe address 0x%lx\n", |
1552 | doc_config_location); | |
1da177e4 LT |
1553 | ret = doc_probe(doc_config_location); |
1554 | if (ret < 0) | |
964dfce9 | 1555 | return ret; |
1da177e4 | 1556 | } else { |
21c9fb61 | 1557 | for (i = 0; i < ARRAY_SIZE(doc_locations); i++) { |
1da177e4 LT |
1558 | doc_probe(doc_locations[i]); |
1559 | } | |
1560 | } | |
1561 | /* No banner message any more. Print a message if no DiskOnChip | |
1562 | found, so the user knows we at least tried. */ | |
1563 | if (!doclist) { | |
63fa37f0 | 1564 | pr_info("No valid DiskOnChip devices found\n"); |
1da177e4 | 1565 | ret = -ENODEV; |
1da177e4 | 1566 | } |
1da177e4 LT |
1567 | return ret; |
1568 | } | |
1569 | ||
1570 | static void __exit cleanup_nanddoc(void) | |
1571 | { | |
1572 | /* Cleanup the nand/DoC resources */ | |
1573 | release_nanddoc(); | |
1da177e4 LT |
1574 | } |
1575 | ||
1576 | module_init(init_nanddoc); | |
1577 | module_exit(cleanup_nanddoc); | |
1578 | ||
1579 | MODULE_LICENSE("GPL"); | |
1580 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
2a7af8ca | 1581 | MODULE_DESCRIPTION("M-Systems DiskOnChip 2000, Millennium and Millennium Plus device driver"); |