]>
Commit | Line | Data |
---|---|---|
1079432e SL |
1 | /* |
2 | * (C) Copyright 2007-2008 | |
c9e798d3 | 3 | * Stelian Pop <stelian@popies.net> |
1079432e SL |
4 | * Lead Tech Design <www.leadtechdesign.com> |
5 | * | |
6 | * (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas | |
7 | * | |
bdfd59aa WJ |
8 | * Add Programmable Multibit ECC support for various AT91 SoC |
9 | * (C) Copyright 2012 ATMEL, Hong Xu | |
10 | * | |
1a459660 | 11 | * SPDX-License-Identifier: GPL-2.0+ |
1079432e SL |
12 | */ |
13 | ||
14 | #include <common.h> | |
ac45bb16 | 15 | #include <asm/gpio.h> |
1079432e | 16 | #include <asm/arch/gpio.h> |
1079432e | 17 | |
ddd85974 | 18 | #include <malloc.h> |
1079432e | 19 | #include <nand.h> |
bdfd59aa | 20 | #include <watchdog.h> |
c1ec4062 | 21 | #include <linux/mtd/nand_ecc.h> |
1079432e | 22 | |
7c27b7b1 NP |
23 | #ifdef CONFIG_ATMEL_NAND_HWECC |
24 | ||
25 | /* Register access macros */ | |
26 | #define ecc_readl(add, reg) \ | |
27 | readl(AT91_BASE_SYS + add + ATMEL_ECC_##reg) | |
28 | #define ecc_writel(add, reg, value) \ | |
29 | writel((value), AT91_BASE_SYS + add + ATMEL_ECC_##reg) | |
30 | ||
31 | #include "atmel_nand_ecc.h" /* Hardware ECC registers */ | |
32 | ||
bdfd59aa WJ |
33 | #ifdef CONFIG_ATMEL_NAND_HW_PMECC |
34 | ||
0b0b4f59 BS |
35 | #ifdef CONFIG_SPL_BUILD |
36 | #undef CONFIG_SYS_NAND_ONFI_DETECTION | |
37 | #endif | |
38 | ||
bdfd59aa WJ |
39 | struct atmel_nand_host { |
40 | struct pmecc_regs __iomem *pmecc; | |
41 | struct pmecc_errloc_regs __iomem *pmerrloc; | |
42 | void __iomem *pmecc_rom_base; | |
43 | ||
44 | u8 pmecc_corr_cap; | |
45 | u16 pmecc_sector_size; | |
46 | u32 pmecc_index_table_offset; | |
0e48dc5e | 47 | u32 pmecc_version; |
bdfd59aa WJ |
48 | |
49 | int pmecc_bytes_per_sector; | |
50 | int pmecc_sector_number; | |
51 | int pmecc_degree; /* Degree of remainders */ | |
52 | int pmecc_cw_len; /* Length of codeword */ | |
53 | ||
54 | /* lookup table for alpha_to and index_of */ | |
55 | void __iomem *pmecc_alpha_to; | |
56 | void __iomem *pmecc_index_of; | |
57 | ||
58 | /* data for pmecc computation */ | |
ddd85974 WJ |
59 | int16_t *pmecc_smu; |
60 | int16_t *pmecc_partial_syn; | |
61 | int16_t *pmecc_si; | |
62 | int16_t *pmecc_lmu; /* polynomal order */ | |
63 | int *pmecc_mu; | |
64 | int *pmecc_dmu; | |
65 | int *pmecc_delta; | |
bdfd59aa WJ |
66 | }; |
67 | ||
68 | static struct atmel_nand_host pmecc_host; | |
69 | static struct nand_ecclayout atmel_pmecc_oobinfo; | |
70 | ||
71 | /* | |
72 | * Return number of ecc bytes per sector according to sector size and | |
73 | * correction capability | |
74 | * | |
75 | * Following table shows what at91 PMECC supported: | |
76 | * Correction Capability Sector_512_bytes Sector_1024_bytes | |
77 | * ===================== ================ ================= | |
78 | * 2-bits 4-bytes 4-bytes | |
79 | * 4-bits 7-bytes 7-bytes | |
80 | * 8-bits 13-bytes 14-bytes | |
81 | * 12-bits 20-bytes 21-bytes | |
82 | * 24-bits 39-bytes 42-bytes | |
258b21fc | 83 | * 32-bits 52-bytes 56-bytes |
bdfd59aa WJ |
84 | */ |
85 | static int pmecc_get_ecc_bytes(int cap, int sector_size) | |
86 | { | |
87 | int m = 12 + sector_size / 512; | |
88 | return (m * cap + 7) / 8; | |
89 | } | |
90 | ||
91 | static void pmecc_config_ecc_layout(struct nand_ecclayout *layout, | |
92 | int oobsize, int ecc_len) | |
93 | { | |
94 | int i; | |
95 | ||
96 | layout->eccbytes = ecc_len; | |
97 | ||
98 | /* ECC will occupy the last ecc_len bytes continuously */ | |
99 | for (i = 0; i < ecc_len; i++) | |
100 | layout->eccpos[i] = oobsize - ecc_len + i; | |
101 | ||
102 | layout->oobfree[0].offset = 2; | |
103 | layout->oobfree[0].length = | |
104 | oobsize - ecc_len - layout->oobfree[0].offset; | |
105 | } | |
106 | ||
107 | static void __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host) | |
108 | { | |
109 | int table_size; | |
110 | ||
111 | table_size = host->pmecc_sector_size == 512 ? | |
112 | PMECC_INDEX_TABLE_SIZE_512 : PMECC_INDEX_TABLE_SIZE_1024; | |
113 | ||
114 | /* the ALPHA lookup table is right behind the INDEX lookup table. */ | |
115 | return host->pmecc_rom_base + host->pmecc_index_table_offset + | |
116 | table_size * sizeof(int16_t); | |
117 | } | |
118 | ||
ddd85974 WJ |
119 | static void pmecc_data_free(struct atmel_nand_host *host) |
120 | { | |
121 | free(host->pmecc_partial_syn); | |
122 | free(host->pmecc_si); | |
123 | free(host->pmecc_lmu); | |
124 | free(host->pmecc_smu); | |
125 | free(host->pmecc_mu); | |
126 | free(host->pmecc_dmu); | |
127 | free(host->pmecc_delta); | |
128 | } | |
129 | ||
130 | static int pmecc_data_alloc(struct atmel_nand_host *host) | |
131 | { | |
132 | const int cap = host->pmecc_corr_cap; | |
133 | int size; | |
134 | ||
135 | size = (2 * cap + 1) * sizeof(int16_t); | |
136 | host->pmecc_partial_syn = malloc(size); | |
137 | host->pmecc_si = malloc(size); | |
138 | host->pmecc_lmu = malloc((cap + 1) * sizeof(int16_t)); | |
139 | host->pmecc_smu = malloc((cap + 2) * size); | |
140 | ||
141 | size = (cap + 1) * sizeof(int); | |
142 | host->pmecc_mu = malloc(size); | |
143 | host->pmecc_dmu = malloc(size); | |
144 | host->pmecc_delta = malloc(size); | |
145 | ||
146 | if (host->pmecc_partial_syn && | |
147 | host->pmecc_si && | |
148 | host->pmecc_lmu && | |
149 | host->pmecc_smu && | |
150 | host->pmecc_mu && | |
151 | host->pmecc_dmu && | |
152 | host->pmecc_delta) | |
153 | return 0; | |
154 | ||
155 | /* error happened */ | |
156 | pmecc_data_free(host); | |
157 | return -ENOMEM; | |
158 | ||
159 | } | |
160 | ||
bdfd59aa WJ |
161 | static void pmecc_gen_syndrome(struct mtd_info *mtd, int sector) |
162 | { | |
163 | struct nand_chip *nand_chip = mtd->priv; | |
164 | struct atmel_nand_host *host = nand_chip->priv; | |
165 | int i; | |
166 | uint32_t value; | |
167 | ||
168 | /* Fill odd syndromes */ | |
169 | for (i = 0; i < host->pmecc_corr_cap; i++) { | |
14b3b44e | 170 | value = pmecc_readl(host->pmecc, rem_port[sector].rem[i / 2]); |
bdfd59aa WJ |
171 | if (i & 1) |
172 | value >>= 16; | |
173 | value &= 0xffff; | |
174 | host->pmecc_partial_syn[(2 * i) + 1] = (int16_t)value; | |
175 | } | |
176 | } | |
177 | ||
178 | static void pmecc_substitute(struct mtd_info *mtd) | |
179 | { | |
180 | struct nand_chip *nand_chip = mtd->priv; | |
181 | struct atmel_nand_host *host = nand_chip->priv; | |
182 | int16_t __iomem *alpha_to = host->pmecc_alpha_to; | |
183 | int16_t __iomem *index_of = host->pmecc_index_of; | |
184 | int16_t *partial_syn = host->pmecc_partial_syn; | |
185 | const int cap = host->pmecc_corr_cap; | |
186 | int16_t *si; | |
187 | int i, j; | |
188 | ||
189 | /* si[] is a table that holds the current syndrome value, | |
190 | * an element of that table belongs to the field | |
191 | */ | |
192 | si = host->pmecc_si; | |
193 | ||
194 | memset(&si[1], 0, sizeof(int16_t) * (2 * cap - 1)); | |
195 | ||
196 | /* Computation 2t syndromes based on S(x) */ | |
197 | /* Odd syndromes */ | |
198 | for (i = 1; i < 2 * cap; i += 2) { | |
199 | for (j = 0; j < host->pmecc_degree; j++) { | |
200 | if (partial_syn[i] & (0x1 << j)) | |
201 | si[i] = readw(alpha_to + i * j) ^ si[i]; | |
202 | } | |
203 | } | |
204 | /* Even syndrome = (Odd syndrome) ** 2 */ | |
205 | for (i = 2, j = 1; j <= cap; i = ++j << 1) { | |
206 | if (si[j] == 0) { | |
207 | si[i] = 0; | |
208 | } else { | |
209 | int16_t tmp; | |
210 | ||
211 | tmp = readw(index_of + si[j]); | |
212 | tmp = (tmp * 2) % host->pmecc_cw_len; | |
213 | si[i] = readw(alpha_to + tmp); | |
214 | } | |
215 | } | |
216 | } | |
217 | ||
218 | /* | |
219 | * This function defines a Berlekamp iterative procedure for | |
220 | * finding the value of the error location polynomial. | |
221 | * The input is si[], initialize by pmecc_substitute(). | |
222 | * The output is smu[][]. | |
223 | * | |
224 | * This function is written according to chip datasheet Chapter: | |
225 | * Find the Error Location Polynomial Sigma(x) of Section: | |
226 | * Programmable Multibit ECC Control (PMECC). | |
227 | */ | |
228 | static void pmecc_get_sigma(struct mtd_info *mtd) | |
229 | { | |
230 | struct nand_chip *nand_chip = mtd->priv; | |
231 | struct atmel_nand_host *host = nand_chip->priv; | |
232 | ||
233 | int16_t *lmu = host->pmecc_lmu; | |
234 | int16_t *si = host->pmecc_si; | |
235 | int *mu = host->pmecc_mu; | |
236 | int *dmu = host->pmecc_dmu; /* Discrepancy */ | |
237 | int *delta = host->pmecc_delta; /* Delta order */ | |
238 | int cw_len = host->pmecc_cw_len; | |
239 | const int16_t cap = host->pmecc_corr_cap; | |
240 | const int num = 2 * cap + 1; | |
241 | int16_t __iomem *index_of = host->pmecc_index_of; | |
242 | int16_t __iomem *alpha_to = host->pmecc_alpha_to; | |
243 | int i, j, k; | |
244 | uint32_t dmu_0_count, tmp; | |
245 | int16_t *smu = host->pmecc_smu; | |
246 | ||
247 | /* index of largest delta */ | |
248 | int ro; | |
249 | int largest; | |
250 | int diff; | |
251 | ||
252 | /* Init the Sigma(x) */ | |
253 | memset(smu, 0, sizeof(int16_t) * ARRAY_SIZE(smu)); | |
254 | ||
255 | dmu_0_count = 0; | |
256 | ||
257 | /* First Row */ | |
258 | ||
259 | /* Mu */ | |
260 | mu[0] = -1; | |
261 | ||
262 | smu[0] = 1; | |
263 | ||
264 | /* discrepancy set to 1 */ | |
265 | dmu[0] = 1; | |
266 | /* polynom order set to 0 */ | |
267 | lmu[0] = 0; | |
268 | /* delta[0] = (mu[0] * 2 - lmu[0]) >> 1; */ | |
269 | delta[0] = -1; | |
270 | ||
271 | /* Second Row */ | |
272 | ||
273 | /* Mu */ | |
274 | mu[1] = 0; | |
275 | /* Sigma(x) set to 1 */ | |
276 | smu[num] = 1; | |
277 | ||
278 | /* discrepancy set to S1 */ | |
279 | dmu[1] = si[1]; | |
280 | ||
281 | /* polynom order set to 0 */ | |
282 | lmu[1] = 0; | |
283 | ||
284 | /* delta[1] = (mu[1] * 2 - lmu[1]) >> 1; */ | |
285 | delta[1] = 0; | |
286 | ||
287 | for (i = 1; i <= cap; i++) { | |
288 | mu[i + 1] = i << 1; | |
289 | /* Begin Computing Sigma (Mu+1) and L(mu) */ | |
290 | /* check if discrepancy is set to 0 */ | |
291 | if (dmu[i] == 0) { | |
292 | dmu_0_count++; | |
293 | ||
294 | tmp = ((cap - (lmu[i] >> 1) - 1) / 2); | |
295 | if ((cap - (lmu[i] >> 1) - 1) & 0x1) | |
296 | tmp += 2; | |
297 | else | |
298 | tmp += 1; | |
299 | ||
300 | if (dmu_0_count == tmp) { | |
301 | for (j = 0; j <= (lmu[i] >> 1) + 1; j++) | |
302 | smu[(cap + 1) * num + j] = | |
303 | smu[i * num + j]; | |
304 | ||
305 | lmu[cap + 1] = lmu[i]; | |
306 | return; | |
307 | } | |
308 | ||
309 | /* copy polynom */ | |
310 | for (j = 0; j <= lmu[i] >> 1; j++) | |
311 | smu[(i + 1) * num + j] = smu[i * num + j]; | |
312 | ||
313 | /* copy previous polynom order to the next */ | |
314 | lmu[i + 1] = lmu[i]; | |
315 | } else { | |
316 | ro = 0; | |
317 | largest = -1; | |
318 | /* find largest delta with dmu != 0 */ | |
319 | for (j = 0; j < i; j++) { | |
320 | if ((dmu[j]) && (delta[j] > largest)) { | |
321 | largest = delta[j]; | |
322 | ro = j; | |
323 | } | |
324 | } | |
325 | ||
326 | /* compute difference */ | |
327 | diff = (mu[i] - mu[ro]); | |
328 | ||
329 | /* Compute degree of the new smu polynomial */ | |
330 | if ((lmu[i] >> 1) > ((lmu[ro] >> 1) + diff)) | |
331 | lmu[i + 1] = lmu[i]; | |
332 | else | |
333 | lmu[i + 1] = ((lmu[ro] >> 1) + diff) * 2; | |
334 | ||
335 | /* Init smu[i+1] with 0 */ | |
336 | for (k = 0; k < num; k++) | |
337 | smu[(i + 1) * num + k] = 0; | |
338 | ||
339 | /* Compute smu[i+1] */ | |
340 | for (k = 0; k <= lmu[ro] >> 1; k++) { | |
341 | int16_t a, b, c; | |
342 | ||
343 | if (!(smu[ro * num + k] && dmu[i])) | |
344 | continue; | |
345 | a = readw(index_of + dmu[i]); | |
346 | b = readw(index_of + dmu[ro]); | |
347 | c = readw(index_of + smu[ro * num + k]); | |
348 | tmp = a + (cw_len - b) + c; | |
349 | a = readw(alpha_to + tmp % cw_len); | |
350 | smu[(i + 1) * num + (k + diff)] = a; | |
351 | } | |
352 | ||
353 | for (k = 0; k <= lmu[i] >> 1; k++) | |
354 | smu[(i + 1) * num + k] ^= smu[i * num + k]; | |
355 | } | |
356 | ||
357 | /* End Computing Sigma (Mu+1) and L(mu) */ | |
358 | /* In either case compute delta */ | |
359 | delta[i + 1] = (mu[i + 1] * 2 - lmu[i + 1]) >> 1; | |
360 | ||
361 | /* Do not compute discrepancy for the last iteration */ | |
362 | if (i >= cap) | |
363 | continue; | |
364 | ||
365 | for (k = 0; k <= (lmu[i + 1] >> 1); k++) { | |
366 | tmp = 2 * (i - 1); | |
367 | if (k == 0) { | |
368 | dmu[i + 1] = si[tmp + 3]; | |
369 | } else if (smu[(i + 1) * num + k] && si[tmp + 3 - k]) { | |
370 | int16_t a, b, c; | |
371 | a = readw(index_of + | |
372 | smu[(i + 1) * num + k]); | |
373 | b = si[2 * (i - 1) + 3 - k]; | |
374 | c = readw(index_of + b); | |
375 | tmp = a + c; | |
376 | tmp %= cw_len; | |
377 | dmu[i + 1] = readw(alpha_to + tmp) ^ | |
378 | dmu[i + 1]; | |
379 | } | |
380 | } | |
381 | } | |
382 | } | |
383 | ||
384 | static int pmecc_err_location(struct mtd_info *mtd) | |
385 | { | |
386 | struct nand_chip *nand_chip = mtd->priv; | |
387 | struct atmel_nand_host *host = nand_chip->priv; | |
388 | const int cap = host->pmecc_corr_cap; | |
389 | const int num = 2 * cap + 1; | |
390 | int sector_size = host->pmecc_sector_size; | |
391 | int err_nbr = 0; /* number of error */ | |
392 | int roots_nbr; /* number of roots */ | |
393 | int i; | |
394 | uint32_t val; | |
395 | int16_t *smu = host->pmecc_smu; | |
396 | int timeout = PMECC_MAX_TIMEOUT_US; | |
397 | ||
14b3b44e | 398 | pmecc_writel(host->pmerrloc, eldis, PMERRLOC_DISABLE); |
bdfd59aa WJ |
399 | |
400 | for (i = 0; i <= host->pmecc_lmu[cap + 1] >> 1; i++) { | |
14b3b44e WJ |
401 | pmecc_writel(host->pmerrloc, sigma[i], |
402 | smu[(cap + 1) * num + i]); | |
bdfd59aa WJ |
403 | err_nbr++; |
404 | } | |
405 | ||
406 | val = PMERRLOC_ELCFG_NUM_ERRORS(err_nbr - 1); | |
407 | if (sector_size == 1024) | |
408 | val |= PMERRLOC_ELCFG_SECTOR_1024; | |
409 | ||
14b3b44e WJ |
410 | pmecc_writel(host->pmerrloc, elcfg, val); |
411 | pmecc_writel(host->pmerrloc, elen, | |
412 | sector_size * 8 + host->pmecc_degree * cap); | |
bdfd59aa WJ |
413 | |
414 | while (--timeout) { | |
14b3b44e | 415 | if (pmecc_readl(host->pmerrloc, elisr) & PMERRLOC_CALC_DONE) |
bdfd59aa WJ |
416 | break; |
417 | WATCHDOG_RESET(); | |
418 | udelay(1); | |
419 | } | |
420 | ||
421 | if (!timeout) { | |
c0dc3dec | 422 | dev_err(host->dev, "atmel_nand : Timeout to calculate PMECC error location\n"); |
bdfd59aa WJ |
423 | return -1; |
424 | } | |
425 | ||
14b3b44e | 426 | roots_nbr = (pmecc_readl(host->pmerrloc, elisr) & PMERRLOC_ERR_NUM_MASK) |
bdfd59aa WJ |
427 | >> 8; |
428 | /* Number of roots == degree of smu hence <= cap */ | |
429 | if (roots_nbr == host->pmecc_lmu[cap + 1] >> 1) | |
430 | return err_nbr - 1; | |
431 | ||
432 | /* Number of roots does not match the degree of smu | |
433 | * unable to correct error */ | |
434 | return -1; | |
435 | } | |
436 | ||
437 | static void pmecc_correct_data(struct mtd_info *mtd, uint8_t *buf, uint8_t *ecc, | |
438 | int sector_num, int extra_bytes, int err_nbr) | |
439 | { | |
440 | struct nand_chip *nand_chip = mtd->priv; | |
441 | struct atmel_nand_host *host = nand_chip->priv; | |
442 | int i = 0; | |
443 | int byte_pos, bit_pos, sector_size, pos; | |
444 | uint32_t tmp; | |
445 | uint8_t err_byte; | |
446 | ||
447 | sector_size = host->pmecc_sector_size; | |
448 | ||
449 | while (err_nbr) { | |
14b3b44e | 450 | tmp = pmecc_readl(host->pmerrloc, el[i]) - 1; |
bdfd59aa WJ |
451 | byte_pos = tmp / 8; |
452 | bit_pos = tmp % 8; | |
453 | ||
454 | if (byte_pos >= (sector_size + extra_bytes)) | |
455 | BUG(); /* should never happen */ | |
456 | ||
457 | if (byte_pos < sector_size) { | |
458 | err_byte = *(buf + byte_pos); | |
459 | *(buf + byte_pos) ^= (1 << bit_pos); | |
460 | ||
461 | pos = sector_num * host->pmecc_sector_size + byte_pos; | |
c55cc573 | 462 | dev_dbg(host->dev, "Bit flip in data area, byte_pos: %d, bit_pos: %d, 0x%02x -> 0x%02x\n", |
bdfd59aa WJ |
463 | pos, bit_pos, err_byte, *(buf + byte_pos)); |
464 | } else { | |
465 | /* Bit flip in OOB area */ | |
466 | tmp = sector_num * host->pmecc_bytes_per_sector | |
467 | + (byte_pos - sector_size); | |
468 | err_byte = ecc[tmp]; | |
469 | ecc[tmp] ^= (1 << bit_pos); | |
470 | ||
471 | pos = tmp + nand_chip->ecc.layout->eccpos[0]; | |
c55cc573 | 472 | dev_dbg(host->dev, "Bit flip in OOB, oob_byte_pos: %d, bit_pos: %d, 0x%02x -> 0x%02x\n", |
bdfd59aa WJ |
473 | pos, bit_pos, err_byte, ecc[tmp]); |
474 | } | |
475 | ||
476 | i++; | |
477 | err_nbr--; | |
478 | } | |
479 | ||
480 | return; | |
481 | } | |
482 | ||
483 | static int pmecc_correction(struct mtd_info *mtd, u32 pmecc_stat, uint8_t *buf, | |
484 | u8 *ecc) | |
485 | { | |
486 | struct nand_chip *nand_chip = mtd->priv; | |
487 | struct atmel_nand_host *host = nand_chip->priv; | |
488 | int i, err_nbr, eccbytes; | |
489 | uint8_t *buf_pos; | |
490 | ||
0e48dc5e WJ |
491 | /* SAMA5D4 PMECC IP can correct errors for all 0xff page */ |
492 | if (host->pmecc_version >= PMECC_VERSION_SAMA5D4) | |
493 | goto normal_check; | |
494 | ||
bdfd59aa WJ |
495 | eccbytes = nand_chip->ecc.bytes; |
496 | for (i = 0; i < eccbytes; i++) | |
497 | if (ecc[i] != 0xff) | |
498 | goto normal_check; | |
499 | /* Erased page, return OK */ | |
500 | return 0; | |
501 | ||
502 | normal_check: | |
503 | for (i = 0; i < host->pmecc_sector_number; i++) { | |
504 | err_nbr = 0; | |
505 | if (pmecc_stat & 0x1) { | |
506 | buf_pos = buf + i * host->pmecc_sector_size; | |
507 | ||
508 | pmecc_gen_syndrome(mtd, i); | |
509 | pmecc_substitute(mtd); | |
510 | pmecc_get_sigma(mtd); | |
511 | ||
512 | err_nbr = pmecc_err_location(mtd); | |
513 | if (err_nbr == -1) { | |
c0dc3dec | 514 | dev_err(host->dev, "PMECC: Too many errors\n"); |
bdfd59aa WJ |
515 | mtd->ecc_stats.failed++; |
516 | return -EIO; | |
517 | } else { | |
518 | pmecc_correct_data(mtd, buf_pos, ecc, i, | |
519 | host->pmecc_bytes_per_sector, err_nbr); | |
520 | mtd->ecc_stats.corrected += err_nbr; | |
521 | } | |
522 | } | |
523 | pmecc_stat >>= 1; | |
524 | } | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | static int atmel_nand_pmecc_read_page(struct mtd_info *mtd, | |
dfe64e2c | 530 | struct nand_chip *chip, uint8_t *buf, int oob_required, int page) |
bdfd59aa WJ |
531 | { |
532 | struct atmel_nand_host *host = chip->priv; | |
533 | int eccsize = chip->ecc.size; | |
534 | uint8_t *oob = chip->oob_poi; | |
535 | uint32_t *eccpos = chip->ecc.layout->eccpos; | |
536 | uint32_t stat; | |
537 | int timeout = PMECC_MAX_TIMEOUT_US; | |
538 | ||
539 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_RST); | |
540 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DISABLE); | |
541 | pmecc_writel(host->pmecc, cfg, ((pmecc_readl(host->pmecc, cfg)) | |
542 | & ~PMECC_CFG_WRITE_OP) | PMECC_CFG_AUTO_ENABLE); | |
543 | ||
544 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_ENABLE); | |
545 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DATA); | |
546 | ||
547 | chip->read_buf(mtd, buf, eccsize); | |
548 | chip->read_buf(mtd, oob, mtd->oobsize); | |
549 | ||
550 | while (--timeout) { | |
551 | if (!(pmecc_readl(host->pmecc, sr) & PMECC_SR_BUSY)) | |
552 | break; | |
553 | WATCHDOG_RESET(); | |
554 | udelay(1); | |
555 | } | |
556 | ||
557 | if (!timeout) { | |
c0dc3dec | 558 | dev_err(host->dev, "atmel_nand : Timeout to read PMECC page\n"); |
bdfd59aa WJ |
559 | return -1; |
560 | } | |
561 | ||
562 | stat = pmecc_readl(host->pmecc, isr); | |
563 | if (stat != 0) | |
564 | if (pmecc_correction(mtd, stat, buf, &oob[eccpos[0]]) != 0) | |
565 | return -EIO; | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
dfe64e2c SL |
570 | static int atmel_nand_pmecc_write_page(struct mtd_info *mtd, |
571 | struct nand_chip *chip, const uint8_t *buf, | |
572 | int oob_required) | |
bdfd59aa WJ |
573 | { |
574 | struct atmel_nand_host *host = chip->priv; | |
575 | uint32_t *eccpos = chip->ecc.layout->eccpos; | |
576 | int i, j; | |
577 | int timeout = PMECC_MAX_TIMEOUT_US; | |
578 | ||
579 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_RST); | |
580 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DISABLE); | |
581 | ||
582 | pmecc_writel(host->pmecc, cfg, (pmecc_readl(host->pmecc, cfg) | | |
583 | PMECC_CFG_WRITE_OP) & ~PMECC_CFG_AUTO_ENABLE); | |
584 | ||
585 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_ENABLE); | |
586 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DATA); | |
587 | ||
588 | chip->write_buf(mtd, (u8 *)buf, mtd->writesize); | |
589 | ||
590 | while (--timeout) { | |
591 | if (!(pmecc_readl(host->pmecc, sr) & PMECC_SR_BUSY)) | |
592 | break; | |
593 | WATCHDOG_RESET(); | |
594 | udelay(1); | |
595 | } | |
596 | ||
597 | if (!timeout) { | |
c0dc3dec | 598 | dev_err(host->dev, "atmel_nand : Timeout to read PMECC status, fail to write PMECC in oob\n"); |
dfe64e2c | 599 | goto out; |
bdfd59aa WJ |
600 | } |
601 | ||
602 | for (i = 0; i < host->pmecc_sector_number; i++) { | |
603 | for (j = 0; j < host->pmecc_bytes_per_sector; j++) { | |
604 | int pos; | |
605 | ||
606 | pos = i * host->pmecc_bytes_per_sector + j; | |
607 | chip->oob_poi[eccpos[pos]] = | |
14b3b44e | 608 | pmecc_readb(host->pmecc, ecc_port[i].ecc[j]); |
bdfd59aa WJ |
609 | } |
610 | } | |
611 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); | |
dfe64e2c SL |
612 | out: |
613 | return 0; | |
bdfd59aa WJ |
614 | } |
615 | ||
616 | static void atmel_pmecc_core_init(struct mtd_info *mtd) | |
617 | { | |
618 | struct nand_chip *nand_chip = mtd->priv; | |
619 | struct atmel_nand_host *host = nand_chip->priv; | |
620 | uint32_t val = 0; | |
621 | struct nand_ecclayout *ecc_layout; | |
622 | ||
623 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_RST); | |
624 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DISABLE); | |
625 | ||
626 | switch (host->pmecc_corr_cap) { | |
627 | case 2: | |
628 | val = PMECC_CFG_BCH_ERR2; | |
629 | break; | |
630 | case 4: | |
631 | val = PMECC_CFG_BCH_ERR4; | |
632 | break; | |
633 | case 8: | |
634 | val = PMECC_CFG_BCH_ERR8; | |
635 | break; | |
636 | case 12: | |
637 | val = PMECC_CFG_BCH_ERR12; | |
638 | break; | |
639 | case 24: | |
640 | val = PMECC_CFG_BCH_ERR24; | |
641 | break; | |
258b21fc JW |
642 | case 32: |
643 | val = PMECC_CFG_BCH_ERR32; | |
644 | break; | |
bdfd59aa WJ |
645 | } |
646 | ||
647 | if (host->pmecc_sector_size == 512) | |
648 | val |= PMECC_CFG_SECTOR512; | |
649 | else if (host->pmecc_sector_size == 1024) | |
650 | val |= PMECC_CFG_SECTOR1024; | |
651 | ||
652 | switch (host->pmecc_sector_number) { | |
653 | case 1: | |
654 | val |= PMECC_CFG_PAGE_1SECTOR; | |
655 | break; | |
656 | case 2: | |
657 | val |= PMECC_CFG_PAGE_2SECTORS; | |
658 | break; | |
659 | case 4: | |
660 | val |= PMECC_CFG_PAGE_4SECTORS; | |
661 | break; | |
662 | case 8: | |
663 | val |= PMECC_CFG_PAGE_8SECTORS; | |
664 | break; | |
665 | } | |
666 | ||
667 | val |= (PMECC_CFG_READ_OP | PMECC_CFG_SPARE_DISABLE | |
668 | | PMECC_CFG_AUTO_DISABLE); | |
669 | pmecc_writel(host->pmecc, cfg, val); | |
670 | ||
671 | ecc_layout = nand_chip->ecc.layout; | |
672 | pmecc_writel(host->pmecc, sarea, mtd->oobsize - 1); | |
673 | pmecc_writel(host->pmecc, saddr, ecc_layout->eccpos[0]); | |
674 | pmecc_writel(host->pmecc, eaddr, | |
675 | ecc_layout->eccpos[ecc_layout->eccbytes - 1]); | |
676 | /* See datasheet about PMECC Clock Control Register */ | |
677 | pmecc_writel(host->pmecc, clk, PMECC_CLK_133MHZ); | |
678 | pmecc_writel(host->pmecc, idr, 0xff); | |
679 | pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_ENABLE); | |
680 | } | |
681 | ||
a07d2294 | 682 | #ifdef CONFIG_SYS_NAND_ONFI_DETECTION |
a07d2294 WJ |
683 | /* |
684 | * pmecc_choose_ecc - Get ecc requirement from ONFI parameters. If | |
685 | * pmecc_corr_cap or pmecc_sector_size is 0, then set it as | |
686 | * ONFI ECC parameters. | |
687 | * @host: point to an atmel_nand_host structure. | |
688 | * if host->pmecc_corr_cap is 0 then set it as the ONFI ecc_bits. | |
689 | * if host->pmecc_sector_size is 0 then set it as the ONFI sector_size. | |
690 | * @chip: point to an nand_chip structure. | |
691 | * @cap: store the ONFI ECC correct bits capbility | |
692 | * @sector_size: in how many bytes that ONFI require to correct @ecc_bits | |
693 | * | |
694 | * Return 0 if success. otherwise return the error code. | |
695 | */ | |
696 | static int pmecc_choose_ecc(struct atmel_nand_host *host, | |
697 | struct nand_chip *chip, | |
698 | int *cap, int *sector_size) | |
699 | { | |
700 | /* Get ECC requirement from ONFI parameters */ | |
701 | *cap = *sector_size = 0; | |
702 | if (chip->onfi_version) { | |
3a205671 JW |
703 | *cap = chip->ecc_strength_ds; |
704 | *sector_size = chip->ecc_step_ds; | |
705 | MTDDEBUG(MTD_DEBUG_LEVEL1, "ONFI params, minimum required ECC: %d bits in %d bytes\n", | |
706 | *cap, *sector_size); | |
a07d2294 | 707 | } |
3a205671 | 708 | |
a07d2294 | 709 | if (*cap == 0 && *sector_size == 0) { |
3a205671 JW |
710 | /* Non-ONFI compliant */ |
711 | dev_info(host->dev, "NAND chip is not ONFI compliant, assume ecc_bits is 2 in 512 bytes\n"); | |
a07d2294 WJ |
712 | *cap = 2; |
713 | *sector_size = 512; | |
714 | } | |
715 | ||
716 | /* If head file doesn't specify then use the one in ONFI parameters */ | |
717 | if (host->pmecc_corr_cap == 0) { | |
718 | /* use the most fitable ecc bits (the near bigger one ) */ | |
719 | if (*cap <= 2) | |
720 | host->pmecc_corr_cap = 2; | |
721 | else if (*cap <= 4) | |
722 | host->pmecc_corr_cap = 4; | |
723 | else if (*cap <= 8) | |
724 | host->pmecc_corr_cap = 8; | |
725 | else if (*cap <= 12) | |
726 | host->pmecc_corr_cap = 12; | |
727 | else if (*cap <= 24) | |
728 | host->pmecc_corr_cap = 24; | |
729 | else | |
258b21fc JW |
730 | #ifdef CONFIG_SAMA5D2 |
731 | host->pmecc_corr_cap = 32; | |
732 | #else | |
733 | host->pmecc_corr_cap = 24; | |
734 | #endif | |
a07d2294 WJ |
735 | } |
736 | if (host->pmecc_sector_size == 0) { | |
737 | /* use the most fitable sector size (the near smaller one ) */ | |
738 | if (*sector_size >= 1024) | |
739 | host->pmecc_sector_size = 1024; | |
740 | else if (*sector_size >= 512) | |
741 | host->pmecc_sector_size = 512; | |
742 | else | |
743 | return -EINVAL; | |
744 | } | |
745 | return 0; | |
746 | } | |
747 | #endif | |
748 | ||
7df4486d JW |
749 | #if defined(NO_GALOIS_TABLE_IN_ROM) |
750 | static uint16_t *pmecc_galois_table; | |
751 | static inline int deg(unsigned int poly) | |
752 | { | |
753 | /* polynomial degree is the most-significant bit index */ | |
754 | return fls(poly) - 1; | |
755 | } | |
756 | ||
757 | static int build_gf_tables(int mm, unsigned int poly, | |
758 | int16_t *index_of, int16_t *alpha_to) | |
759 | { | |
760 | unsigned int i, x = 1; | |
761 | const unsigned int k = 1 << deg(poly); | |
762 | unsigned int nn = (1 << mm) - 1; | |
763 | ||
764 | /* primitive polynomial must be of degree m */ | |
765 | if (k != (1u << mm)) | |
766 | return -EINVAL; | |
767 | ||
768 | for (i = 0; i < nn; i++) { | |
769 | alpha_to[i] = x; | |
770 | index_of[x] = i; | |
771 | if (i && (x == 1)) | |
772 | /* polynomial is not primitive (a^i=1 with 0<i<2^m-1) */ | |
773 | return -EINVAL; | |
774 | x <<= 1; | |
775 | if (x & k) | |
776 | x ^= poly; | |
777 | } | |
778 | ||
779 | alpha_to[nn] = 1; | |
780 | index_of[0] = 0; | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
785 | static uint16_t *create_lookup_table(int sector_size) | |
786 | { | |
787 | int degree = (sector_size == 512) ? | |
788 | PMECC_GF_DIMENSION_13 : | |
789 | PMECC_GF_DIMENSION_14; | |
790 | unsigned int poly = (sector_size == 512) ? | |
791 | PMECC_GF_13_PRIMITIVE_POLY : | |
792 | PMECC_GF_14_PRIMITIVE_POLY; | |
793 | int table_size = (sector_size == 512) ? | |
794 | PMECC_INDEX_TABLE_SIZE_512 : | |
795 | PMECC_INDEX_TABLE_SIZE_1024; | |
796 | ||
797 | int16_t *addr = kzalloc(2 * table_size * sizeof(uint16_t), GFP_KERNEL); | |
798 | if (addr && build_gf_tables(degree, poly, addr, addr + table_size)) | |
799 | return NULL; | |
800 | ||
801 | return (uint16_t *)addr; | |
802 | } | |
803 | #endif | |
804 | ||
bdfd59aa WJ |
805 | static int atmel_pmecc_nand_init_params(struct nand_chip *nand, |
806 | struct mtd_info *mtd) | |
807 | { | |
808 | struct atmel_nand_host *host; | |
809 | int cap, sector_size; | |
810 | ||
811 | host = nand->priv = &pmecc_host; | |
812 | ||
813 | nand->ecc.mode = NAND_ECC_HW; | |
814 | nand->ecc.calculate = NULL; | |
815 | nand->ecc.correct = NULL; | |
816 | nand->ecc.hwctl = NULL; | |
817 | ||
a07d2294 WJ |
818 | #ifdef CONFIG_SYS_NAND_ONFI_DETECTION |
819 | host->pmecc_corr_cap = host->pmecc_sector_size = 0; | |
820 | ||
821 | #ifdef CONFIG_PMECC_CAP | |
822 | host->pmecc_corr_cap = CONFIG_PMECC_CAP; | |
823 | #endif | |
824 | #ifdef CONFIG_PMECC_SECTOR_SIZE | |
825 | host->pmecc_sector_size = CONFIG_PMECC_SECTOR_SIZE; | |
826 | #endif | |
827 | /* Get ECC requirement of ONFI parameters. And if CONFIG_PMECC_CAP or | |
828 | * CONFIG_PMECC_SECTOR_SIZE not defined, then use ecc_bits, sector_size | |
829 | * from ONFI. | |
830 | */ | |
831 | if (pmecc_choose_ecc(host, nand, &cap, §or_size)) { | |
4c6a6ea3 JW |
832 | dev_err(host->dev, "Required ECC %d bits in %d bytes not supported!\n", |
833 | cap, sector_size); | |
a07d2294 WJ |
834 | return -EINVAL; |
835 | } | |
836 | ||
837 | if (cap > host->pmecc_corr_cap) | |
838 | dev_info(host->dev, "WARNING: Using different ecc correct bits(%d bit) from Nand ONFI ECC reqirement (%d bit).\n", | |
839 | host->pmecc_corr_cap, cap); | |
840 | if (sector_size < host->pmecc_sector_size) | |
841 | dev_info(host->dev, "WARNING: Using different ecc correct sector size (%d bytes) from Nand ONFI ECC reqirement (%d bytes).\n", | |
842 | host->pmecc_sector_size, sector_size); | |
843 | #else /* CONFIG_SYS_NAND_ONFI_DETECTION */ | |
844 | host->pmecc_corr_cap = CONFIG_PMECC_CAP; | |
845 | host->pmecc_sector_size = CONFIG_PMECC_SECTOR_SIZE; | |
846 | #endif | |
847 | ||
848 | cap = host->pmecc_corr_cap; | |
849 | sector_size = host->pmecc_sector_size; | |
850 | ||
851 | /* TODO: need check whether cap & sector_size is validate */ | |
7df4486d JW |
852 | #if defined(NO_GALOIS_TABLE_IN_ROM) |
853 | /* | |
854 | * As pmecc_rom_base is the begin of the gallois field table, So the | |
855 | * index offset just set as 0. | |
856 | */ | |
857 | host->pmecc_index_table_offset = 0; | |
858 | #else | |
b2d96dc2 WJ |
859 | if (host->pmecc_sector_size == 512) |
860 | host->pmecc_index_table_offset = ATMEL_PMECC_INDEX_OFFSET_512; | |
861 | else | |
862 | host->pmecc_index_table_offset = ATMEL_PMECC_INDEX_OFFSET_1024; | |
7df4486d | 863 | #endif |
bdfd59aa | 864 | |
b9c83c68 WJ |
865 | MTDDEBUG(MTD_DEBUG_LEVEL1, |
866 | "Initialize PMECC params, cap: %d, sector: %d\n", | |
867 | cap, sector_size); | |
bdfd59aa WJ |
868 | |
869 | host->pmecc = (struct pmecc_regs __iomem *) ATMEL_BASE_PMECC; | |
870 | host->pmerrloc = (struct pmecc_errloc_regs __iomem *) | |
871 | ATMEL_BASE_PMERRLOC; | |
7df4486d JW |
872 | #if defined(NO_GALOIS_TABLE_IN_ROM) |
873 | pmecc_galois_table = create_lookup_table(host->pmecc_sector_size); | |
874 | if (!pmecc_galois_table) { | |
875 | dev_err(host->dev, "out of memory\n"); | |
876 | return -ENOMEM; | |
877 | } | |
878 | ||
879 | host->pmecc_rom_base = (void __iomem *)pmecc_galois_table; | |
880 | #else | |
bdfd59aa | 881 | host->pmecc_rom_base = (void __iomem *) ATMEL_BASE_ROM; |
7df4486d | 882 | #endif |
bdfd59aa WJ |
883 | |
884 | /* ECC is calculated for the whole page (1 step) */ | |
885 | nand->ecc.size = mtd->writesize; | |
886 | ||
887 | /* set ECC page size and oob layout */ | |
888 | switch (mtd->writesize) { | |
889 | case 2048: | |
890 | case 4096: | |
16dddef6 | 891 | case 8192: |
1bd3e2a8 WJ |
892 | host->pmecc_degree = (sector_size == 512) ? |
893 | PMECC_GF_DIMENSION_13 : PMECC_GF_DIMENSION_14; | |
bdfd59aa WJ |
894 | host->pmecc_cw_len = (1 << host->pmecc_degree) - 1; |
895 | host->pmecc_sector_number = mtd->writesize / sector_size; | |
896 | host->pmecc_bytes_per_sector = pmecc_get_ecc_bytes( | |
897 | cap, sector_size); | |
898 | host->pmecc_alpha_to = pmecc_get_alpha_to(host); | |
899 | host->pmecc_index_of = host->pmecc_rom_base + | |
900 | host->pmecc_index_table_offset; | |
901 | ||
902 | nand->ecc.steps = 1; | |
903 | nand->ecc.bytes = host->pmecc_bytes_per_sector * | |
904 | host->pmecc_sector_number; | |
16dddef6 WJ |
905 | |
906 | if (nand->ecc.bytes > MTD_MAX_ECCPOS_ENTRIES_LARGE) { | |
907 | dev_err(host->dev, "too large eccpos entries. max support ecc.bytes is %d\n", | |
908 | MTD_MAX_ECCPOS_ENTRIES_LARGE); | |
909 | return -EINVAL; | |
910 | } | |
911 | ||
422b49e2 | 912 | if (nand->ecc.bytes > mtd->oobsize - PMECC_OOB_RESERVED_BYTES) { |
c0dc3dec | 913 | dev_err(host->dev, "No room for ECC bytes\n"); |
bdfd59aa WJ |
914 | return -EINVAL; |
915 | } | |
916 | pmecc_config_ecc_layout(&atmel_pmecc_oobinfo, | |
917 | mtd->oobsize, | |
918 | nand->ecc.bytes); | |
919 | nand->ecc.layout = &atmel_pmecc_oobinfo; | |
920 | break; | |
921 | case 512: | |
922 | case 1024: | |
923 | /* TODO */ | |
c0dc3dec | 924 | dev_err(host->dev, "Unsupported page size for PMECC, use Software ECC\n"); |
bdfd59aa WJ |
925 | default: |
926 | /* page size not handled by HW ECC */ | |
927 | /* switching back to soft ECC */ | |
928 | nand->ecc.mode = NAND_ECC_SOFT; | |
929 | nand->ecc.read_page = NULL; | |
930 | nand->ecc.postpad = 0; | |
931 | nand->ecc.prepad = 0; | |
932 | nand->ecc.bytes = 0; | |
933 | return 0; | |
934 | } | |
935 | ||
ddd85974 WJ |
936 | /* Allocate data for PMECC computation */ |
937 | if (pmecc_data_alloc(host)) { | |
938 | dev_err(host->dev, "Cannot allocate memory for PMECC computation!\n"); | |
939 | return -ENOMEM; | |
940 | } | |
941 | ||
d357b940 | 942 | nand->options |= NAND_NO_SUBPAGE_WRITE; |
bdfd59aa WJ |
943 | nand->ecc.read_page = atmel_nand_pmecc_read_page; |
944 | nand->ecc.write_page = atmel_nand_pmecc_write_page; | |
dfe64e2c | 945 | nand->ecc.strength = cap; |
bdfd59aa | 946 | |
0e48dc5e WJ |
947 | /* Check the PMECC ip version */ |
948 | host->pmecc_version = pmecc_readl(host->pmerrloc, version); | |
949 | dev_dbg(host->dev, "PMECC IP version is: %x\n", host->pmecc_version); | |
950 | ||
bdfd59aa WJ |
951 | atmel_pmecc_core_init(mtd); |
952 | ||
953 | return 0; | |
954 | } | |
955 | ||
956 | #else | |
957 | ||
7c27b7b1 NP |
958 | /* oob layout for large page size |
959 | * bad block info is on bytes 0 and 1 | |
960 | * the bytes have to be consecutives to avoid | |
961 | * several NAND_CMD_RNDOUT during read | |
962 | */ | |
963 | static struct nand_ecclayout atmel_oobinfo_large = { | |
964 | .eccbytes = 4, | |
965 | .eccpos = {60, 61, 62, 63}, | |
966 | .oobfree = { | |
967 | {2, 58} | |
968 | }, | |
969 | }; | |
970 | ||
971 | /* oob layout for small page size | |
972 | * bad block info is on bytes 4 and 5 | |
973 | * the bytes have to be consecutives to avoid | |
974 | * several NAND_CMD_RNDOUT during read | |
975 | */ | |
976 | static struct nand_ecclayout atmel_oobinfo_small = { | |
977 | .eccbytes = 4, | |
978 | .eccpos = {0, 1, 2, 3}, | |
979 | .oobfree = { | |
980 | {6, 10} | |
981 | }, | |
982 | }; | |
983 | ||
984 | /* | |
985 | * Calculate HW ECC | |
986 | * | |
987 | * function called after a write | |
988 | * | |
989 | * mtd: MTD block structure | |
990 | * dat: raw data (unused) | |
991 | * ecc_code: buffer for ECC | |
992 | */ | |
993 | static int atmel_nand_calculate(struct mtd_info *mtd, | |
994 | const u_char *dat, unsigned char *ecc_code) | |
995 | { | |
7c27b7b1 NP |
996 | unsigned int ecc_value; |
997 | ||
998 | /* get the first 2 ECC bytes */ | |
999 | ecc_value = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, PR); | |
1000 | ||
1001 | ecc_code[0] = ecc_value & 0xFF; | |
1002 | ecc_code[1] = (ecc_value >> 8) & 0xFF; | |
1003 | ||
1004 | /* get the last 2 ECC bytes */ | |
1005 | ecc_value = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, NPR) & ATMEL_ECC_NPARITY; | |
1006 | ||
1007 | ecc_code[2] = ecc_value & 0xFF; | |
1008 | ecc_code[3] = (ecc_value >> 8) & 0xFF; | |
1009 | ||
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * HW ECC read page function | |
1015 | * | |
1016 | * mtd: mtd info structure | |
1017 | * chip: nand chip info structure | |
1018 | * buf: buffer to store read data | |
dfe64e2c | 1019 | * oob_required: caller expects OOB data read to chip->oob_poi |
7c27b7b1 | 1020 | */ |
dfe64e2c SL |
1021 | static int atmel_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip, |
1022 | uint8_t *buf, int oob_required, int page) | |
7c27b7b1 NP |
1023 | { |
1024 | int eccsize = chip->ecc.size; | |
1025 | int eccbytes = chip->ecc.bytes; | |
1026 | uint32_t *eccpos = chip->ecc.layout->eccpos; | |
1027 | uint8_t *p = buf; | |
1028 | uint8_t *oob = chip->oob_poi; | |
1029 | uint8_t *ecc_pos; | |
1030 | int stat; | |
1031 | ||
1032 | /* read the page */ | |
1033 | chip->read_buf(mtd, p, eccsize); | |
1034 | ||
1035 | /* move to ECC position if needed */ | |
1036 | if (eccpos[0] != 0) { | |
1037 | /* This only works on large pages | |
1038 | * because the ECC controller waits for | |
1039 | * NAND_CMD_RNDOUTSTART after the | |
1040 | * NAND_CMD_RNDOUT. | |
1041 | * anyway, for small pages, the eccpos[0] == 0 | |
1042 | */ | |
1043 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, | |
1044 | mtd->writesize + eccpos[0], -1); | |
1045 | } | |
1046 | ||
1047 | /* the ECC controller needs to read the ECC just after the data */ | |
1048 | ecc_pos = oob + eccpos[0]; | |
1049 | chip->read_buf(mtd, ecc_pos, eccbytes); | |
1050 | ||
1051 | /* check if there's an error */ | |
1052 | stat = chip->ecc.correct(mtd, p, oob, NULL); | |
1053 | ||
1054 | if (stat < 0) | |
1055 | mtd->ecc_stats.failed++; | |
1056 | else | |
1057 | mtd->ecc_stats.corrected += stat; | |
1058 | ||
1059 | /* get back to oob start (end of page) */ | |
1060 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1); | |
1061 | ||
1062 | /* read the oob */ | |
1063 | chip->read_buf(mtd, oob, mtd->oobsize); | |
1064 | ||
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * HW ECC Correction | |
1070 | * | |
1071 | * function called after a read | |
1072 | * | |
1073 | * mtd: MTD block structure | |
1074 | * dat: raw data read from the chip | |
1075 | * read_ecc: ECC from the chip (unused) | |
1076 | * isnull: unused | |
1077 | * | |
1078 | * Detect and correct a 1 bit error for a page | |
1079 | */ | |
1080 | static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat, | |
1081 | u_char *read_ecc, u_char *isnull) | |
1082 | { | |
1083 | struct nand_chip *nand_chip = mtd->priv; | |
ae79794e | 1084 | unsigned int ecc_status; |
7c27b7b1 NP |
1085 | unsigned int ecc_word, ecc_bit; |
1086 | ||
1087 | /* get the status from the Status Register */ | |
1088 | ecc_status = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, SR); | |
1089 | ||
1090 | /* if there's no error */ | |
1091 | if (likely(!(ecc_status & ATMEL_ECC_RECERR))) | |
1092 | return 0; | |
1093 | ||
1094 | /* get error bit offset (4 bits) */ | |
1095 | ecc_bit = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, PR) & ATMEL_ECC_BITADDR; | |
1096 | /* get word address (12 bits) */ | |
1097 | ecc_word = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, PR) & ATMEL_ECC_WORDADDR; | |
1098 | ecc_word >>= 4; | |
1099 | ||
1100 | /* if there are multiple errors */ | |
1101 | if (ecc_status & ATMEL_ECC_MULERR) { | |
1102 | /* check if it is a freshly erased block | |
1103 | * (filled with 0xff) */ | |
1104 | if ((ecc_bit == ATMEL_ECC_BITADDR) | |
1105 | && (ecc_word == (ATMEL_ECC_WORDADDR >> 4))) { | |
1106 | /* the block has just been erased, return OK */ | |
1107 | return 0; | |
1108 | } | |
1109 | /* it doesn't seems to be a freshly | |
1110 | * erased block. | |
1111 | * We can't correct so many errors */ | |
c0dc3dec | 1112 | dev_warn(host->dev, "atmel_nand : multiple errors detected." |
7c27b7b1 NP |
1113 | " Unable to correct.\n"); |
1114 | return -EIO; | |
1115 | } | |
1116 | ||
1117 | /* if there's a single bit error : we can correct it */ | |
1118 | if (ecc_status & ATMEL_ECC_ECCERR) { | |
1119 | /* there's nothing much to do here. | |
1120 | * the bit error is on the ECC itself. | |
1121 | */ | |
c0dc3dec | 1122 | dev_warn(host->dev, "atmel_nand : one bit error on ECC code." |
7c27b7b1 NP |
1123 | " Nothing to correct\n"); |
1124 | return 0; | |
1125 | } | |
1126 | ||
c0dc3dec | 1127 | dev_warn(host->dev, "atmel_nand : one bit error on data." |
7c27b7b1 NP |
1128 | " (word offset in the page :" |
1129 | " 0x%x bit offset : 0x%x)\n", | |
1130 | ecc_word, ecc_bit); | |
1131 | /* correct the error */ | |
1132 | if (nand_chip->options & NAND_BUSWIDTH_16) { | |
1133 | /* 16 bits words */ | |
1134 | ((unsigned short *) dat)[ecc_word] ^= (1 << ecc_bit); | |
1135 | } else { | |
1136 | /* 8 bits words */ | |
1137 | dat[ecc_word] ^= (1 << ecc_bit); | |
1138 | } | |
c0dc3dec | 1139 | dev_warn(host->dev, "atmel_nand : error corrected\n"); |
7c27b7b1 NP |
1140 | return 1; |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * Enable HW ECC : unused on most chips | |
1145 | */ | |
1146 | static void atmel_nand_hwctl(struct mtd_info *mtd, int mode) | |
1147 | { | |
1148 | } | |
fe2185ea WJ |
1149 | |
1150 | int atmel_hwecc_nand_init_param(struct nand_chip *nand, struct mtd_info *mtd) | |
1151 | { | |
1152 | nand->ecc.mode = NAND_ECC_HW; | |
1153 | nand->ecc.calculate = atmel_nand_calculate; | |
1154 | nand->ecc.correct = atmel_nand_correct; | |
1155 | nand->ecc.hwctl = atmel_nand_hwctl; | |
1156 | nand->ecc.read_page = atmel_nand_read_page; | |
1157 | nand->ecc.bytes = 4; | |
1158 | ||
1159 | if (nand->ecc.mode == NAND_ECC_HW) { | |
1160 | /* ECC is calculated for the whole page (1 step) */ | |
1161 | nand->ecc.size = mtd->writesize; | |
1162 | ||
1163 | /* set ECC page size and oob layout */ | |
1164 | switch (mtd->writesize) { | |
1165 | case 512: | |
1166 | nand->ecc.layout = &atmel_oobinfo_small; | |
1167 | ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, | |
1168 | ATMEL_ECC_PAGESIZE_528); | |
1169 | break; | |
1170 | case 1024: | |
1171 | nand->ecc.layout = &atmel_oobinfo_large; | |
1172 | ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, | |
1173 | ATMEL_ECC_PAGESIZE_1056); | |
1174 | break; | |
1175 | case 2048: | |
1176 | nand->ecc.layout = &atmel_oobinfo_large; | |
1177 | ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, | |
1178 | ATMEL_ECC_PAGESIZE_2112); | |
1179 | break; | |
1180 | case 4096: | |
1181 | nand->ecc.layout = &atmel_oobinfo_large; | |
1182 | ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, | |
1183 | ATMEL_ECC_PAGESIZE_4224); | |
1184 | break; | |
1185 | default: | |
1186 | /* page size not handled by HW ECC */ | |
1187 | /* switching back to soft ECC */ | |
1188 | nand->ecc.mode = NAND_ECC_SOFT; | |
1189 | nand->ecc.calculate = NULL; | |
1190 | nand->ecc.correct = NULL; | |
1191 | nand->ecc.hwctl = NULL; | |
1192 | nand->ecc.read_page = NULL; | |
1193 | nand->ecc.postpad = 0; | |
1194 | nand->ecc.prepad = 0; | |
1195 | nand->ecc.bytes = 0; | |
1196 | break; | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
bdfd59aa WJ |
1203 | #endif /* CONFIG_ATMEL_NAND_HW_PMECC */ |
1204 | ||
1205 | #endif /* CONFIG_ATMEL_NAND_HWECC */ | |
7c27b7b1 | 1206 | |
74c076d6 | 1207 | static void at91_nand_hwcontrol(struct mtd_info *mtd, |
1079432e SL |
1208 | int cmd, unsigned int ctrl) |
1209 | { | |
1210 | struct nand_chip *this = mtd->priv; | |
1211 | ||
1212 | if (ctrl & NAND_CTRL_CHANGE) { | |
1213 | ulong IO_ADDR_W = (ulong) this->IO_ADDR_W; | |
74c076d6 JCPV |
1214 | IO_ADDR_W &= ~(CONFIG_SYS_NAND_MASK_ALE |
1215 | | CONFIG_SYS_NAND_MASK_CLE); | |
1079432e SL |
1216 | |
1217 | if (ctrl & NAND_CLE) | |
74c076d6 | 1218 | IO_ADDR_W |= CONFIG_SYS_NAND_MASK_CLE; |
1079432e | 1219 | if (ctrl & NAND_ALE) |
74c076d6 | 1220 | IO_ADDR_W |= CONFIG_SYS_NAND_MASK_ALE; |
1079432e | 1221 | |
67a490d6 | 1222 | #ifdef CONFIG_SYS_NAND_ENABLE_PIN |
ac45bb16 | 1223 | gpio_set_value(CONFIG_SYS_NAND_ENABLE_PIN, !(ctrl & NAND_NCE)); |
67a490d6 | 1224 | #endif |
1079432e SL |
1225 | this->IO_ADDR_W = (void *) IO_ADDR_W; |
1226 | } | |
1227 | ||
1228 | if (cmd != NAND_CMD_NONE) | |
1229 | writeb(cmd, this->IO_ADDR_W); | |
1230 | } | |
1231 | ||
74c076d6 JCPV |
1232 | #ifdef CONFIG_SYS_NAND_READY_PIN |
1233 | static int at91_nand_ready(struct mtd_info *mtd) | |
1079432e | 1234 | { |
ac45bb16 | 1235 | return gpio_get_value(CONFIG_SYS_NAND_READY_PIN); |
1079432e | 1236 | } |
74c076d6 | 1237 | #endif |
1079432e | 1238 | |
0b0b4f59 BS |
1239 | #ifdef CONFIG_SPL_BUILD |
1240 | /* The following code is for SPL */ | |
b616d9b0 | 1241 | static struct mtd_info *mtd; |
0b0b4f59 BS |
1242 | static struct nand_chip nand_chip; |
1243 | ||
1244 | static int nand_command(int block, int page, uint32_t offs, u8 cmd) | |
1245 | { | |
b616d9b0 | 1246 | struct nand_chip *this = mtd->priv; |
0b0b4f59 BS |
1247 | int page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT; |
1248 | void (*hwctrl)(struct mtd_info *mtd, int cmd, | |
1249 | unsigned int ctrl) = this->cmd_ctrl; | |
1250 | ||
b616d9b0 | 1251 | while (!this->dev_ready(mtd)) |
0b0b4f59 BS |
1252 | ; |
1253 | ||
1254 | if (cmd == NAND_CMD_READOOB) { | |
1255 | offs += CONFIG_SYS_NAND_PAGE_SIZE; | |
1256 | cmd = NAND_CMD_READ0; | |
1257 | } | |
1258 | ||
b616d9b0 | 1259 | hwctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE); |
0b0b4f59 | 1260 | |
27ce9e42 | 1261 | if ((this->options & NAND_BUSWIDTH_16) && !nand_opcode_8bits(cmd)) |
0b0b4f59 BS |
1262 | offs >>= 1; |
1263 | ||
b616d9b0 SW |
1264 | hwctrl(mtd, offs & 0xff, NAND_CTRL_ALE | NAND_CTRL_CHANGE); |
1265 | hwctrl(mtd, (offs >> 8) & 0xff, NAND_CTRL_ALE); | |
1266 | hwctrl(mtd, (page_addr & 0xff), NAND_CTRL_ALE); | |
1267 | hwctrl(mtd, ((page_addr >> 8) & 0xff), NAND_CTRL_ALE); | |
0b0b4f59 | 1268 | #ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE |
b616d9b0 | 1269 | hwctrl(mtd, (page_addr >> 16) & 0x0f, NAND_CTRL_ALE); |
0b0b4f59 | 1270 | #endif |
b616d9b0 | 1271 | hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
0b0b4f59 | 1272 | |
b616d9b0 SW |
1273 | hwctrl(mtd, NAND_CMD_READSTART, NAND_CTRL_CLE | NAND_CTRL_CHANGE); |
1274 | hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); | |
0b0b4f59 | 1275 | |
b616d9b0 | 1276 | while (!this->dev_ready(mtd)) |
0b0b4f59 BS |
1277 | ; |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | static int nand_is_bad_block(int block) | |
1283 | { | |
b616d9b0 | 1284 | struct nand_chip *this = mtd->priv; |
0b0b4f59 BS |
1285 | |
1286 | nand_command(block, 0, CONFIG_SYS_NAND_BAD_BLOCK_POS, NAND_CMD_READOOB); | |
1287 | ||
1288 | if (this->options & NAND_BUSWIDTH_16) { | |
1289 | if (readw(this->IO_ADDR_R) != 0xffff) | |
1290 | return 1; | |
1291 | } else { | |
1292 | if (readb(this->IO_ADDR_R) != 0xff) | |
1293 | return 1; | |
1294 | } | |
1295 | ||
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | #ifdef CONFIG_SPL_NAND_ECC | |
1300 | static int nand_ecc_pos[] = CONFIG_SYS_NAND_ECCPOS; | |
1301 | #define ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \ | |
1302 | CONFIG_SYS_NAND_ECCSIZE) | |
1303 | #define ECCTOTAL (ECCSTEPS * CONFIG_SYS_NAND_ECCBYTES) | |
1304 | ||
1305 | static int nand_read_page(int block, int page, void *dst) | |
1306 | { | |
b616d9b0 | 1307 | struct nand_chip *this = mtd->priv; |
0b0b4f59 BS |
1308 | u_char ecc_calc[ECCTOTAL]; |
1309 | u_char ecc_code[ECCTOTAL]; | |
1310 | u_char oob_data[CONFIG_SYS_NAND_OOBSIZE]; | |
1311 | int eccsize = CONFIG_SYS_NAND_ECCSIZE; | |
1312 | int eccbytes = CONFIG_SYS_NAND_ECCBYTES; | |
1313 | int eccsteps = ECCSTEPS; | |
1314 | int i; | |
1315 | uint8_t *p = dst; | |
1316 | nand_command(block, page, 0, NAND_CMD_READ0); | |
1317 | ||
1318 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { | |
1319 | if (this->ecc.mode != NAND_ECC_SOFT) | |
b616d9b0 SW |
1320 | this->ecc.hwctl(mtd, NAND_ECC_READ); |
1321 | this->read_buf(mtd, p, eccsize); | |
1322 | this->ecc.calculate(mtd, p, &ecc_calc[i]); | |
0b0b4f59 | 1323 | } |
b616d9b0 | 1324 | this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE); |
0b0b4f59 BS |
1325 | |
1326 | for (i = 0; i < ECCTOTAL; i++) | |
1327 | ecc_code[i] = oob_data[nand_ecc_pos[i]]; | |
1328 | ||
1329 | eccsteps = ECCSTEPS; | |
1330 | p = dst; | |
1331 | ||
1332 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) | |
b616d9b0 | 1333 | this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); |
0b0b4f59 BS |
1334 | |
1335 | return 0; | |
1336 | } | |
4dfd3605 HS |
1337 | |
1338 | int spl_nand_erase_one(int block, int page) | |
1339 | { | |
b616d9b0 | 1340 | struct nand_chip *this = mtd->priv; |
4dfd3605 HS |
1341 | void (*hwctrl)(struct mtd_info *mtd, int cmd, |
1342 | unsigned int ctrl) = this->cmd_ctrl; | |
1343 | int page_addr; | |
1344 | ||
1345 | if (nand_chip.select_chip) | |
b616d9b0 | 1346 | nand_chip.select_chip(mtd, 0); |
4dfd3605 HS |
1347 | |
1348 | page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT; | |
b616d9b0 | 1349 | hwctrl(mtd, NAND_CMD_ERASE1, NAND_CTRL_CLE | NAND_CTRL_CHANGE); |
4dfd3605 | 1350 | /* Row address */ |
b616d9b0 SW |
1351 | hwctrl(mtd, (page_addr & 0xff), NAND_CTRL_ALE | NAND_CTRL_CHANGE); |
1352 | hwctrl(mtd, ((page_addr >> 8) & 0xff), | |
4dfd3605 HS |
1353 | NAND_CTRL_ALE | NAND_CTRL_CHANGE); |
1354 | #ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE | |
1355 | /* One more address cycle for devices > 128MiB */ | |
b616d9b0 | 1356 | hwctrl(mtd, (page_addr >> 16) & 0x0f, |
4dfd3605 HS |
1357 | NAND_CTRL_ALE | NAND_CTRL_CHANGE); |
1358 | #endif | |
b616d9b0 | 1359 | hwctrl(mtd, NAND_CMD_ERASE2, NAND_CTRL_CLE | NAND_CTRL_CHANGE); |
4dfd3605 | 1360 | |
b616d9b0 | 1361 | while (!this->dev_ready(mtd)) |
4dfd3605 HS |
1362 | ; |
1363 | ||
1364 | nand_deselect(); | |
1365 | ||
1366 | return 0; | |
1367 | } | |
0b0b4f59 BS |
1368 | #else |
1369 | static int nand_read_page(int block, int page, void *dst) | |
1370 | { | |
b616d9b0 | 1371 | struct nand_chip *this = mtd->priv; |
0b0b4f59 BS |
1372 | |
1373 | nand_command(block, page, 0, NAND_CMD_READ0); | |
b616d9b0 | 1374 | atmel_nand_pmecc_read_page(mtd, this, dst, 0, page); |
0b0b4f59 BS |
1375 | |
1376 | return 0; | |
1377 | } | |
1378 | #endif /* CONFIG_SPL_NAND_ECC */ | |
1379 | ||
1380 | int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst) | |
1381 | { | |
1382 | unsigned int block, lastblock; | |
1383 | unsigned int page; | |
1384 | ||
1385 | block = offs / CONFIG_SYS_NAND_BLOCK_SIZE; | |
1386 | lastblock = (offs + size - 1) / CONFIG_SYS_NAND_BLOCK_SIZE; | |
1387 | page = (offs % CONFIG_SYS_NAND_BLOCK_SIZE) / CONFIG_SYS_NAND_PAGE_SIZE; | |
1388 | ||
1389 | while (block <= lastblock) { | |
1390 | if (!nand_is_bad_block(block)) { | |
1391 | while (page < CONFIG_SYS_NAND_PAGE_COUNT) { | |
1392 | nand_read_page(block, page, dst); | |
1393 | dst += CONFIG_SYS_NAND_PAGE_SIZE; | |
1394 | page++; | |
1395 | } | |
1396 | ||
1397 | page = 0; | |
1398 | } else { | |
1399 | lastblock++; | |
1400 | } | |
1401 | ||
1402 | block++; | |
1403 | } | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | int at91_nand_wait_ready(struct mtd_info *mtd) | |
1409 | { | |
1410 | struct nand_chip *this = mtd->priv; | |
1411 | ||
1412 | udelay(this->chip_delay); | |
1413 | ||
667af369 | 1414 | return 1; |
0b0b4f59 BS |
1415 | } |
1416 | ||
1417 | int board_nand_init(struct nand_chip *nand) | |
1418 | { | |
1419 | int ret = 0; | |
1420 | ||
1421 | nand->ecc.mode = NAND_ECC_SOFT; | |
1422 | #ifdef CONFIG_SYS_NAND_DBW_16 | |
1423 | nand->options = NAND_BUSWIDTH_16; | |
1424 | nand->read_buf = nand_read_buf16; | |
1425 | #else | |
1426 | nand->read_buf = nand_read_buf; | |
1427 | #endif | |
1428 | nand->cmd_ctrl = at91_nand_hwcontrol; | |
1429 | #ifdef CONFIG_SYS_NAND_READY_PIN | |
1430 | nand->dev_ready = at91_nand_ready; | |
1431 | #else | |
1432 | nand->dev_ready = at91_nand_wait_ready; | |
1433 | #endif | |
1434 | nand->chip_delay = 20; | |
da78fb54 DD |
1435 | #ifdef CONFIG_SYS_NAND_USE_FLASH_BBT |
1436 | nand->bbt_options |= NAND_BBT_USE_FLASH; | |
1437 | #endif | |
0b0b4f59 BS |
1438 | |
1439 | #ifdef CONFIG_ATMEL_NAND_HWECC | |
1440 | #ifdef CONFIG_ATMEL_NAND_HW_PMECC | |
b616d9b0 | 1441 | ret = atmel_pmecc_nand_init_params(nand, mtd); |
0b0b4f59 BS |
1442 | #endif |
1443 | #endif | |
1444 | ||
1445 | return ret; | |
1446 | } | |
1447 | ||
1448 | void nand_init(void) | |
1449 | { | |
b616d9b0 SW |
1450 | mtd = &nand_chip.mtd; |
1451 | mtd->writesize = CONFIG_SYS_NAND_PAGE_SIZE; | |
1452 | mtd->oobsize = CONFIG_SYS_NAND_OOBSIZE; | |
1453 | mtd->priv = &nand_chip; | |
0b0b4f59 BS |
1454 | nand_chip.IO_ADDR_R = (void __iomem *)CONFIG_SYS_NAND_BASE; |
1455 | nand_chip.IO_ADDR_W = (void __iomem *)CONFIG_SYS_NAND_BASE; | |
1456 | board_nand_init(&nand_chip); | |
1457 | ||
1458 | #ifdef CONFIG_SPL_NAND_ECC | |
1459 | if (nand_chip.ecc.mode == NAND_ECC_SOFT) { | |
1460 | nand_chip.ecc.calculate = nand_calculate_ecc; | |
1461 | nand_chip.ecc.correct = nand_correct_data; | |
1462 | } | |
1463 | #endif | |
1464 | ||
1465 | if (nand_chip.select_chip) | |
b616d9b0 | 1466 | nand_chip.select_chip(mtd, 0); |
0b0b4f59 BS |
1467 | } |
1468 | ||
1469 | void nand_deselect(void) | |
1470 | { | |
1471 | if (nand_chip.select_chip) | |
b616d9b0 | 1472 | nand_chip.select_chip(mtd, -1); |
0b0b4f59 BS |
1473 | } |
1474 | ||
1475 | #else | |
1476 | ||
fe2185ea WJ |
1477 | #ifndef CONFIG_SYS_NAND_BASE_LIST |
1478 | #define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE } | |
7c27b7b1 | 1479 | #endif |
fe2185ea WJ |
1480 | static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE]; |
1481 | static ulong base_addr[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST; | |
1482 | ||
1483 | int atmel_nand_chip_init(int devnum, ulong base_addr) | |
1484 | { | |
1485 | int ret; | |
fe2185ea | 1486 | struct nand_chip *nand = &nand_chip[devnum]; |
b616d9b0 | 1487 | struct mtd_info *mtd = &nand->mtd; |
fe2185ea WJ |
1488 | |
1489 | mtd->priv = nand; | |
1490 | nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr; | |
7c27b7b1 | 1491 | |
7604a3f9 BS |
1492 | #ifdef CONFIG_NAND_ECC_BCH |
1493 | nand->ecc.mode = NAND_ECC_SOFT_BCH; | |
1494 | #else | |
1079432e | 1495 | nand->ecc.mode = NAND_ECC_SOFT; |
7604a3f9 | 1496 | #endif |
1079432e SL |
1497 | #ifdef CONFIG_SYS_NAND_DBW_16 |
1498 | nand->options = NAND_BUSWIDTH_16; | |
1499 | #endif | |
74c076d6 JCPV |
1500 | nand->cmd_ctrl = at91_nand_hwcontrol; |
1501 | #ifdef CONFIG_SYS_NAND_READY_PIN | |
1502 | nand->dev_ready = at91_nand_ready; | |
1503 | #endif | |
16dddef6 | 1504 | nand->chip_delay = 75; |
da78fb54 DD |
1505 | #ifdef CONFIG_SYS_NAND_USE_FLASH_BBT |
1506 | nand->bbt_options |= NAND_BBT_USE_FLASH; | |
1507 | #endif | |
1079432e | 1508 | |
fe2185ea WJ |
1509 | ret = nand_scan_ident(mtd, CONFIG_SYS_NAND_MAX_CHIPS, NULL); |
1510 | if (ret) | |
1511 | return ret; | |
7c27b7b1 NP |
1512 | |
1513 | #ifdef CONFIG_ATMEL_NAND_HWECC | |
bdfd59aa WJ |
1514 | #ifdef CONFIG_ATMEL_NAND_HW_PMECC |
1515 | ret = atmel_pmecc_nand_init_params(nand, mtd); | |
1516 | #else | |
fe2185ea | 1517 | ret = atmel_hwecc_nand_init_param(nand, mtd); |
bdfd59aa | 1518 | #endif |
fe2185ea WJ |
1519 | if (ret) |
1520 | return ret; | |
1521 | #endif | |
7c27b7b1 | 1522 | |
fe2185ea WJ |
1523 | ret = nand_scan_tail(mtd); |
1524 | if (!ret) | |
b616d9b0 | 1525 | nand_register(devnum, mtd); |
7c27b7b1 | 1526 | |
fe2185ea WJ |
1527 | return ret; |
1528 | } | |
7c27b7b1 | 1529 | |
fe2185ea WJ |
1530 | void board_nand_init(void) |
1531 | { | |
1532 | int i; | |
1533 | for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) | |
1534 | if (atmel_nand_chip_init(i, base_addr[i])) | |
c0dc3dec | 1535 | dev_err(host->dev, "atmel_nand: Fail to initialize #%d chip", |
fe2185ea | 1536 | i); |
1079432e | 1537 | } |
0b0b4f59 | 1538 | #endif /* CONFIG_SPL_BUILD */ |