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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-11-30 07:35:02 -0500
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-11-30 07:35:02 -0500
commit96178769652ba886d4dfe770e770456689cbb559 (patch)
treeb405f45d4ba9ca6ab90d41f055adb57e08fe7376 /drivers/mtd
parent2e386e4bac90554887e73d6f342e845185b33fc3 (diff)
parent1fbff0a6e975a986032881f139b806c23680f823 (diff)
Merge branch 'mxc-nand' of git://git.pengutronix.de/git/imx/linux-2.6
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/mxc_nand.c773
1 files changed, 298 insertions, 475 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 4bc43eb6c604..f7366e99fe1e 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -33,9 +33,13 @@
33 33
34#include <asm/mach/flash.h> 34#include <asm/mach/flash.h>
35#include <mach/mxc_nand.h> 35#include <mach/mxc_nand.h>
36#include <mach/hardware.h>
36 37
37#define DRIVER_NAME "mxc_nand" 38#define DRIVER_NAME "mxc_nand"
38 39
40#define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35())
41#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27())
42
39/* Addresses for NFC registers */ 43/* Addresses for NFC registers */
40#define NFC_BUF_SIZE 0xE00 44#define NFC_BUF_SIZE 0xE00
41#define NFC_BUF_ADDR 0xE04 45#define NFC_BUF_ADDR 0xE04
@@ -46,24 +50,14 @@
46#define NFC_RSLTMAIN_AREA 0xE0E 50#define NFC_RSLTMAIN_AREA 0xE0E
47#define NFC_RSLTSPARE_AREA 0xE10 51#define NFC_RSLTSPARE_AREA 0xE10
48#define NFC_WRPROT 0xE12 52#define NFC_WRPROT 0xE12
49#define NFC_UNLOCKSTART_BLKADDR 0xE14 53#define NFC_V1_UNLOCKSTART_BLKADDR 0xe14
50#define NFC_UNLOCKEND_BLKADDR 0xE16 54#define NFC_V1_UNLOCKEND_BLKADDR 0xe16
55#define NFC_V21_UNLOCKSTART_BLKADDR 0xe20
56#define NFC_V21_UNLOCKEND_BLKADDR 0xe22
51#define NFC_NF_WRPRST 0xE18 57#define NFC_NF_WRPRST 0xE18
52#define NFC_CONFIG1 0xE1A 58#define NFC_CONFIG1 0xE1A
53#define NFC_CONFIG2 0xE1C 59#define NFC_CONFIG2 0xE1C
54 60
55/* Addresses for NFC RAM BUFFER Main area 0 */
56#define MAIN_AREA0 0x000
57#define MAIN_AREA1 0x200
58#define MAIN_AREA2 0x400
59#define MAIN_AREA3 0x600
60
61/* Addresses for NFC SPARE BUFFER Spare area 0 */
62#define SPARE_AREA0 0x800
63#define SPARE_AREA1 0x810
64#define SPARE_AREA2 0x820
65#define SPARE_AREA3 0x830
66
67/* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register 61/* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register
68 * for Command operation */ 62 * for Command operation */
69#define NFC_CMD 0x1 63#define NFC_CMD 0x1
@@ -106,48 +100,66 @@ struct mxc_nand_host {
106 struct mtd_partition *parts; 100 struct mtd_partition *parts;
107 struct device *dev; 101 struct device *dev;
108 102
103 void *spare0;
104 void *main_area0;
105 void *main_area1;
106
107 void __iomem *base;
109 void __iomem *regs; 108 void __iomem *regs;
110 int spare_only;
111 int status_request; 109 int status_request;
112 int pagesize_2k;
113 uint16_t col_addr;
114 struct clk *clk; 110 struct clk *clk;
115 int clk_act; 111 int clk_act;
116 int irq; 112 int irq;
117 113
118 wait_queue_head_t irq_waitq; 114 wait_queue_head_t irq_waitq;
119};
120
121/* Define delays in microsec for NAND device operations */
122#define TROP_US_DELAY 2000
123/* Macros to get byte and bit positions of ECC */
124#define COLPOS(x) ((x) >> 3)
125#define BITPOS(x) ((x) & 0xf)
126 115
127/* Define single bit Error positions in Main & Spare area */ 116 uint8_t *data_buf;
128#define MAIN_SINGLEBIT_ERROR 0x4 117 unsigned int buf_start;
129#define SPARE_SINGLEBIT_ERROR 0x1 118 int spare_len;
130
131/* OOB placement block for use with hardware ecc generation */
132static struct nand_ecclayout nand_hw_eccoob_8 = {
133 .eccbytes = 5,
134 .eccpos = {6, 7, 8, 9, 10},
135 .oobfree = {{0, 5}, {11, 5}, }
136}; 119};
137 120
138static struct nand_ecclayout nand_hw_eccoob_16 = { 121/* OOB placement block for use with hardware ecc generation */
122static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
139 .eccbytes = 5, 123 .eccbytes = 5,
140 .eccpos = {6, 7, 8, 9, 10}, 124 .eccpos = {6, 7, 8, 9, 10},
141 .oobfree = {{0, 5}, {11, 5}, } 125 .oobfree = {{0, 5}, {12, 4}, }
142}; 126};
143 127
144static struct nand_ecclayout nand_hw_eccoob_64 = { 128static struct nand_ecclayout nandv1_hw_eccoob_largepage = {
145 .eccbytes = 20, 129 .eccbytes = 20,
146 .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26, 130 .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
147 38, 39, 40, 41, 42, 54, 55, 56, 57, 58}, 131 38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
148 .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, } 132 .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
149}; 133};
150 134
135/* OOB description for 512 byte pages with 16 byte OOB */
136static struct nand_ecclayout nandv2_hw_eccoob_smallpage = {
137 .eccbytes = 1 * 9,
138 .eccpos = {
139 7, 8, 9, 10, 11, 12, 13, 14, 15
140 },
141 .oobfree = {
142 {.offset = 0, .length = 5}
143 }
144};
145
146/* OOB description for 2048 byte pages with 64 byte OOB */
147static struct nand_ecclayout nandv2_hw_eccoob_largepage = {
148 .eccbytes = 4 * 9,
149 .eccpos = {
150 7, 8, 9, 10, 11, 12, 13, 14, 15,
151 23, 24, 25, 26, 27, 28, 29, 30, 31,
152 39, 40, 41, 42, 43, 44, 45, 46, 47,
153 55, 56, 57, 58, 59, 60, 61, 62, 63
154 },
155 .oobfree = {
156 {.offset = 2, .length = 4},
157 {.offset = 16, .length = 7},
158 {.offset = 32, .length = 7},
159 {.offset = 48, .length = 7}
160 }
161};
162
151#ifdef CONFIG_MTD_PARTITIONS 163#ifdef CONFIG_MTD_PARTITIONS
152static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL }; 164static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL };
153#endif 165#endif
@@ -170,10 +182,10 @@ static irqreturn_t mxc_nfc_irq(int irq, void *dev_id)
170/* This function polls the NANDFC to wait for the basic operation to 182/* This function polls the NANDFC to wait for the basic operation to
171 * complete by checking the INT bit of config2 register. 183 * complete by checking the INT bit of config2 register.
172 */ 184 */
173static void wait_op_done(struct mxc_nand_host *host, int max_retries, 185static void wait_op_done(struct mxc_nand_host *host, int useirq)
174 uint16_t param, int useirq)
175{ 186{
176 uint32_t tmp; 187 uint32_t tmp;
188 int max_retries = 2000;
177 189
178 if (useirq) { 190 if (useirq) {
179 if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) { 191 if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) {
@@ -200,8 +212,8 @@ static void wait_op_done(struct mxc_nand_host *host, int max_retries,
200 udelay(1); 212 udelay(1);
201 } 213 }
202 if (max_retries < 0) 214 if (max_retries < 0)
203 DEBUG(MTD_DEBUG_LEVEL0, "%s(%d): INT not set\n", 215 DEBUG(MTD_DEBUG_LEVEL0, "%s: INT not set\n",
204 __func__, param); 216 __func__);
205 } 217 }
206} 218}
207 219
@@ -215,7 +227,7 @@ static void send_cmd(struct mxc_nand_host *host, uint16_t cmd, int useirq)
215 writew(NFC_CMD, host->regs + NFC_CONFIG2); 227 writew(NFC_CMD, host->regs + NFC_CONFIG2);
216 228
217 /* Wait for operation to complete */ 229 /* Wait for operation to complete */
218 wait_op_done(host, TROP_US_DELAY, cmd, useirq); 230 wait_op_done(host, useirq);
219} 231}
220 232
221/* This function sends an address (or partial address) to the 233/* This function sends an address (or partial address) to the
@@ -229,82 +241,47 @@ static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
229 writew(NFC_ADDR, host->regs + NFC_CONFIG2); 241 writew(NFC_ADDR, host->regs + NFC_CONFIG2);
230 242
231 /* Wait for operation to complete */ 243 /* Wait for operation to complete */
232 wait_op_done(host, TROP_US_DELAY, addr, islast); 244 wait_op_done(host, islast);
233} 245}
234 246
235/* This function requests the NANDFC to initate the transfer 247static void send_page(struct mtd_info *mtd, unsigned int ops)
236 * of data currently in the NANDFC RAM buffer to the NAND device. */
237static void send_prog_page(struct mxc_nand_host *host, uint8_t buf_id,
238 int spare_only)
239{ 248{
240 DEBUG(MTD_DEBUG_LEVEL3, "send_prog_page (%d)\n", spare_only); 249 struct nand_chip *nand_chip = mtd->priv;
241 250 struct mxc_nand_host *host = nand_chip->priv;
242 /* NANDFC buffer 0 is used for page read/write */ 251 int bufs, i;
243 writew(buf_id, host->regs + NFC_BUF_ADDR);
244
245 /* Configure spare or page+spare access */
246 if (!host->pagesize_2k) {
247 uint16_t config1 = readw(host->regs + NFC_CONFIG1);
248 if (spare_only)
249 config1 |= NFC_SP_EN;
250 else
251 config1 &= ~(NFC_SP_EN);
252 writew(config1, host->regs + NFC_CONFIG1);
253 }
254 252
255 writew(NFC_INPUT, host->regs + NFC_CONFIG2); 253 if (nfc_is_v1() && mtd->writesize > 512)
254 bufs = 4;
255 else
256 bufs = 1;
256 257
257 /* Wait for operation to complete */ 258 for (i = 0; i < bufs; i++) {
258 wait_op_done(host, TROP_US_DELAY, spare_only, true);
259}
260 259
261/* Requests NANDFC to initated the transfer of data from the 260 /* NANDFC buffer 0 is used for page read/write */
262 * NAND device into in the NANDFC ram buffer. */ 261 writew(i, host->regs + NFC_BUF_ADDR);
263static void send_read_page(struct mxc_nand_host *host, uint8_t buf_id,
264 int spare_only)
265{
266 DEBUG(MTD_DEBUG_LEVEL3, "send_read_page (%d)\n", spare_only);
267 262
268 /* NANDFC buffer 0 is used for page read/write */ 263 writew(ops, host->regs + NFC_CONFIG2);
269 writew(buf_id, host->regs + NFC_BUF_ADDR);
270 264
271 /* Configure spare or page+spare access */ 265 /* Wait for operation to complete */
272 if (!host->pagesize_2k) { 266 wait_op_done(host, true);
273 uint32_t config1 = readw(host->regs + NFC_CONFIG1);
274 if (spare_only)
275 config1 |= NFC_SP_EN;
276 else
277 config1 &= ~NFC_SP_EN;
278 writew(config1, host->regs + NFC_CONFIG1);
279 } 267 }
280
281 writew(NFC_OUTPUT, host->regs + NFC_CONFIG2);
282
283 /* Wait for operation to complete */
284 wait_op_done(host, TROP_US_DELAY, spare_only, true);
285} 268}
286 269
287/* Request the NANDFC to perform a read of the NAND device ID. */ 270/* Request the NANDFC to perform a read of the NAND device ID. */
288static void send_read_id(struct mxc_nand_host *host) 271static void send_read_id(struct mxc_nand_host *host)
289{ 272{
290 struct nand_chip *this = &host->nand; 273 struct nand_chip *this = &host->nand;
291 uint16_t tmp;
292 274
293 /* NANDFC buffer 0 is used for device ID output */ 275 /* NANDFC buffer 0 is used for device ID output */
294 writew(0x0, host->regs + NFC_BUF_ADDR); 276 writew(0x0, host->regs + NFC_BUF_ADDR);
295 277
296 /* Read ID into main buffer */
297 tmp = readw(host->regs + NFC_CONFIG1);
298 tmp &= ~NFC_SP_EN;
299 writew(tmp, host->regs + NFC_CONFIG1);
300
301 writew(NFC_ID, host->regs + NFC_CONFIG2); 278 writew(NFC_ID, host->regs + NFC_CONFIG2);
302 279
303 /* Wait for operation to complete */ 280 /* Wait for operation to complete */
304 wait_op_done(host, TROP_US_DELAY, 0, true); 281 wait_op_done(host, true);
305 282
306 if (this->options & NAND_BUSWIDTH_16) { 283 if (this->options & NAND_BUSWIDTH_16) {
307 void __iomem *main_buf = host->regs + MAIN_AREA0; 284 void __iomem *main_buf = host->main_area0;
308 /* compress the ID info */ 285 /* compress the ID info */
309 writeb(readb(main_buf + 2), main_buf + 1); 286 writeb(readb(main_buf + 2), main_buf + 1);
310 writeb(readb(main_buf + 4), main_buf + 2); 287 writeb(readb(main_buf + 4), main_buf + 2);
@@ -312,15 +289,16 @@ static void send_read_id(struct mxc_nand_host *host)
312 writeb(readb(main_buf + 8), main_buf + 4); 289 writeb(readb(main_buf + 8), main_buf + 4);
313 writeb(readb(main_buf + 10), main_buf + 5); 290 writeb(readb(main_buf + 10), main_buf + 5);
314 } 291 }
292 memcpy(host->data_buf, host->main_area0, 16);
315} 293}
316 294
317/* This function requests the NANDFC to perform a read of the 295/* This function requests the NANDFC to perform a read of the
318 * NAND device status and returns the current status. */ 296 * NAND device status and returns the current status. */
319static uint16_t get_dev_status(struct mxc_nand_host *host) 297static uint16_t get_dev_status(struct mxc_nand_host *host)
320{ 298{
321 void __iomem *main_buf = host->regs + MAIN_AREA1; 299 void __iomem *main_buf = host->main_area1;
322 uint32_t store; 300 uint32_t store;
323 uint16_t ret, tmp; 301 uint16_t ret;
324 /* Issue status request to NAND device */ 302 /* Issue status request to NAND device */
325 303
326 /* store the main area1 first word, later do recovery */ 304 /* store the main area1 first word, later do recovery */
@@ -329,15 +307,10 @@ static uint16_t get_dev_status(struct mxc_nand_host *host)
329 * corruption of read/write buffer on status requests. */ 307 * corruption of read/write buffer on status requests. */
330 writew(1, host->regs + NFC_BUF_ADDR); 308 writew(1, host->regs + NFC_BUF_ADDR);
331 309
332 /* Read status into main buffer */
333 tmp = readw(host->regs + NFC_CONFIG1);
334 tmp &= ~NFC_SP_EN;
335 writew(tmp, host->regs + NFC_CONFIG1);
336
337 writew(NFC_STATUS, host->regs + NFC_CONFIG2); 310 writew(NFC_STATUS, host->regs + NFC_CONFIG2);
338 311
339 /* Wait for operation to complete */ 312 /* Wait for operation to complete */
340 wait_op_done(host, TROP_US_DELAY, 0, true); 313 wait_op_done(host, true);
341 314
342 /* Status is placed in first word of main buffer */ 315 /* Status is placed in first word of main buffer */
343 /* get status, then recovery area 1 data */ 316 /* get status, then recovery area 1 data */
@@ -397,32 +370,14 @@ static u_char mxc_nand_read_byte(struct mtd_info *mtd)
397{ 370{
398 struct nand_chip *nand_chip = mtd->priv; 371 struct nand_chip *nand_chip = mtd->priv;
399 struct mxc_nand_host *host = nand_chip->priv; 372 struct mxc_nand_host *host = nand_chip->priv;
400 uint8_t ret = 0; 373 uint8_t ret;
401 uint16_t col, rd_word;
402 uint16_t __iomem *main_buf = host->regs + MAIN_AREA0;
403 uint16_t __iomem *spare_buf = host->regs + SPARE_AREA0;
404 374
405 /* Check for status request */ 375 /* Check for status request */
406 if (host->status_request) 376 if (host->status_request)
407 return get_dev_status(host) & 0xFF; 377 return get_dev_status(host) & 0xFF;
408 378
409 /* Get column for 16-bit access */ 379 ret = *(uint8_t *)(host->data_buf + host->buf_start);
410 col = host->col_addr >> 1; 380 host->buf_start++;
411
412 /* If we are accessing the spare region */
413 if (host->spare_only)
414 rd_word = readw(&spare_buf[col]);
415 else
416 rd_word = readw(&main_buf[col]);
417
418 /* Pick upper/lower byte of word from RAM buffer */
419 if (host->col_addr & 0x1)
420 ret = (rd_word >> 8) & 0xFF;
421 else
422 ret = rd_word & 0xFF;
423
424 /* Update saved column address */
425 host->col_addr++;
426 381
427 return ret; 382 return ret;
428} 383}
@@ -431,33 +386,10 @@ static uint16_t mxc_nand_read_word(struct mtd_info *mtd)
431{ 386{
432 struct nand_chip *nand_chip = mtd->priv; 387 struct nand_chip *nand_chip = mtd->priv;
433 struct mxc_nand_host *host = nand_chip->priv; 388 struct mxc_nand_host *host = nand_chip->priv;
434 uint16_t col, rd_word, ret; 389 uint16_t ret;
435 uint16_t __iomem *p;
436
437 DEBUG(MTD_DEBUG_LEVEL3,
438 "mxc_nand_read_word(col = %d)\n", host->col_addr);
439
440 col = host->col_addr;
441 /* Adjust saved column address */
442 if (col < mtd->writesize && host->spare_only)
443 col += mtd->writesize;
444 390
445 if (col < mtd->writesize) 391 ret = *(uint16_t *)(host->data_buf + host->buf_start);
446 p = (host->regs + MAIN_AREA0) + (col >> 1); 392 host->buf_start += 2;
447 else
448 p = (host->regs + SPARE_AREA0) + ((col - mtd->writesize) >> 1);
449
450 if (col & 1) {
451 rd_word = readw(p);
452 ret = (rd_word >> 8) & 0xff;
453 rd_word = readw(&p[1]);
454 ret |= (rd_word << 8) & 0xff00;
455
456 } else
457 ret = readw(p);
458
459 /* Update saved column address */
460 host->col_addr = col + 2;
461 393
462 return ret; 394 return ret;
463} 395}
@@ -470,94 +402,14 @@ static void mxc_nand_write_buf(struct mtd_info *mtd,
470{ 402{
471 struct nand_chip *nand_chip = mtd->priv; 403 struct nand_chip *nand_chip = mtd->priv;
472 struct mxc_nand_host *host = nand_chip->priv; 404 struct mxc_nand_host *host = nand_chip->priv;
473 int n, col, i = 0; 405 u16 col = host->buf_start;
474 406 int n = mtd->oobsize + mtd->writesize - col;
475 DEBUG(MTD_DEBUG_LEVEL3,
476 "mxc_nand_write_buf(col = %d, len = %d)\n", host->col_addr,
477 len);
478
479 col = host->col_addr;
480
481 /* Adjust saved column address */
482 if (col < mtd->writesize && host->spare_only)
483 col += mtd->writesize;
484
485 n = mtd->writesize + mtd->oobsize - col;
486 n = min(len, n);
487
488 DEBUG(MTD_DEBUG_LEVEL3,
489 "%s:%d: col = %d, n = %d\n", __func__, __LINE__, col, n);
490
491 while (n) {
492 void __iomem *p;
493
494 if (col < mtd->writesize)
495 p = host->regs + MAIN_AREA0 + (col & ~3);
496 else
497 p = host->regs + SPARE_AREA0 -
498 mtd->writesize + (col & ~3);
499
500 DEBUG(MTD_DEBUG_LEVEL3, "%s:%d: p = %p\n", __func__,
501 __LINE__, p);
502
503 if (((col | (int)&buf[i]) & 3) || n < 16) {
504 uint32_t data = 0;
505
506 if (col & 3 || n < 4)
507 data = readl(p);
508
509 switch (col & 3) {
510 case 0:
511 if (n) {
512 data = (data & 0xffffff00) |
513 (buf[i++] << 0);
514 n--;
515 col++;
516 }
517 case 1:
518 if (n) {
519 data = (data & 0xffff00ff) |
520 (buf[i++] << 8);
521 n--;
522 col++;
523 }
524 case 2:
525 if (n) {
526 data = (data & 0xff00ffff) |
527 (buf[i++] << 16);
528 n--;
529 col++;
530 }
531 case 3:
532 if (n) {
533 data = (data & 0x00ffffff) |
534 (buf[i++] << 24);
535 n--;
536 col++;
537 }
538 }
539 407
540 writel(data, p); 408 n = min(n, len);
541 } else {
542 int m = mtd->writesize - col;
543
544 if (col >= mtd->writesize)
545 m += mtd->oobsize;
546 409
547 m = min(n, m) & ~3; 410 memcpy(host->data_buf + col, buf, n);
548 411
549 DEBUG(MTD_DEBUG_LEVEL3, 412 host->buf_start += n;
550 "%s:%d: n = %d, m = %d, i = %d, col = %d\n",
551 __func__, __LINE__, n, m, i, col);
552
553 memcpy(p, &buf[i], m);
554 col += m;
555 i += m;
556 n -= m;
557 }
558 }
559 /* Update saved column address */
560 host->col_addr = col;
561} 413}
562 414
563/* Read the data buffer from the NAND Flash. To read the data from NAND 415/* Read the data buffer from the NAND Flash. To read the data from NAND
@@ -568,75 +420,14 @@ static void mxc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
568{ 420{
569 struct nand_chip *nand_chip = mtd->priv; 421 struct nand_chip *nand_chip = mtd->priv;
570 struct mxc_nand_host *host = nand_chip->priv; 422 struct mxc_nand_host *host = nand_chip->priv;
571 int n, col, i = 0; 423 u16 col = host->buf_start;
572 424 int n = mtd->oobsize + mtd->writesize - col;
573 DEBUG(MTD_DEBUG_LEVEL3,
574 "mxc_nand_read_buf(col = %d, len = %d)\n", host->col_addr, len);
575
576 col = host->col_addr;
577 425
578 /* Adjust saved column address */ 426 n = min(n, len);
579 if (col < mtd->writesize && host->spare_only)
580 col += mtd->writesize;
581 427
582 n = mtd->writesize + mtd->oobsize - col; 428 memcpy(buf, host->data_buf + col, len);
583 n = min(len, n);
584
585 while (n) {
586 void __iomem *p;
587
588 if (col < mtd->writesize)
589 p = host->regs + MAIN_AREA0 + (col & ~3);
590 else
591 p = host->regs + SPARE_AREA0 -
592 mtd->writesize + (col & ~3);
593
594 if (((col | (int)&buf[i]) & 3) || n < 16) {
595 uint32_t data;
596
597 data = readl(p);
598 switch (col & 3) {
599 case 0:
600 if (n) {
601 buf[i++] = (uint8_t) (data);
602 n--;
603 col++;
604 }
605 case 1:
606 if (n) {
607 buf[i++] = (uint8_t) (data >> 8);
608 n--;
609 col++;
610 }
611 case 2:
612 if (n) {
613 buf[i++] = (uint8_t) (data >> 16);
614 n--;
615 col++;
616 }
617 case 3:
618 if (n) {
619 buf[i++] = (uint8_t) (data >> 24);
620 n--;
621 col++;
622 }
623 }
624 } else {
625 int m = mtd->writesize - col;
626
627 if (col >= mtd->writesize)
628 m += mtd->oobsize;
629
630 m = min(n, m) & ~3;
631 memcpy(&buf[i], p, m);
632 col += m;
633 i += m;
634 n -= m;
635 }
636 }
637 /* Update saved column address */
638 host->col_addr = col;
639 429
430 host->buf_start += len;
640} 431}
641 432
642/* Used by the upper layer to verify the data in NAND Flash 433/* Used by the upper layer to verify the data in NAND Flash
@@ -654,23 +445,6 @@ static void mxc_nand_select_chip(struct mtd_info *mtd, int chip)
654 struct nand_chip *nand_chip = mtd->priv; 445 struct nand_chip *nand_chip = mtd->priv;
655 struct mxc_nand_host *host = nand_chip->priv; 446 struct mxc_nand_host *host = nand_chip->priv;
656 447
657#ifdef CONFIG_MTD_NAND_MXC_FORCE_CE
658 if (chip > 0) {
659 DEBUG(MTD_DEBUG_LEVEL0,
660 "ERROR: Illegal chip select (chip = %d)\n", chip);
661 return;
662 }
663
664 if (chip == -1) {
665 writew(readw(host->regs + NFC_CONFIG1) & ~NFC_CE,
666 host->regs + NFC_CONFIG1);
667 return;
668 }
669
670 writew(readw(host->regs + NFC_CONFIG1) | NFC_CE,
671 host->regs + NFC_CONFIG1);
672#endif
673
674 switch (chip) { 448 switch (chip) {
675 case -1: 449 case -1:
676 /* Disable the NFC clock */ 450 /* Disable the NFC clock */
@@ -692,94 +466,40 @@ static void mxc_nand_select_chip(struct mtd_info *mtd, int chip)
692 } 466 }
693} 467}
694 468
695/* Used by the upper layer to write command to NAND Flash for 469/*
696 * different operations to be carried out on NAND Flash */ 470 * Function to transfer data to/from spare area.
697static void mxc_nand_command(struct mtd_info *mtd, unsigned command, 471 */
698 int column, int page_addr) 472static void copy_spare(struct mtd_info *mtd, bool bfrom)
699{ 473{
700 struct nand_chip *nand_chip = mtd->priv; 474 struct nand_chip *this = mtd->priv;
701 struct mxc_nand_host *host = nand_chip->priv; 475 struct mxc_nand_host *host = this->priv;
702 int useirq = true; 476 u16 i, j;
703 477 u16 n = mtd->writesize >> 9;
704 DEBUG(MTD_DEBUG_LEVEL3, 478 u8 *d = host->data_buf + mtd->writesize;
705 "mxc_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n", 479 u8 *s = host->spare0;
706 command, column, page_addr); 480 u16 t = host->spare_len;
707 481
708 /* Reset command state information */ 482 j = (mtd->oobsize / n >> 1) << 1;
709 host->status_request = false; 483
710 484 if (bfrom) {
711 /* Command pre-processing step */ 485 for (i = 0; i < n - 1; i++)
712 switch (command) { 486 memcpy(d + i * j, s + i * t, j);
713 487
714 case NAND_CMD_STATUS: 488 /* the last section */
715 host->col_addr = 0; 489 memcpy(d + i * j, s + i * t, mtd->oobsize - i * j);
716 host->status_request = true; 490 } else {
717 break; 491 for (i = 0; i < n - 1; i++)
718 492 memcpy(&s[i * t], &d[i * j], j);
719 case NAND_CMD_READ0:
720 host->col_addr = column;
721 host->spare_only = false;
722 useirq = false;
723 break;
724
725 case NAND_CMD_READOOB:
726 host->col_addr = column;
727 host->spare_only = true;
728 useirq = false;
729 if (host->pagesize_2k)
730 command = NAND_CMD_READ0; /* only READ0 is valid */
731 break;
732
733 case NAND_CMD_SEQIN:
734 if (column >= mtd->writesize) {
735 /*
736 * FIXME: before send SEQIN command for write OOB,
737 * We must read one page out.
738 * For K9F1GXX has no READ1 command to set current HW
739 * pointer to spare area, we must write the whole page
740 * including OOB together.
741 */
742 if (host->pagesize_2k)
743 /* call ourself to read a page */
744 mxc_nand_command(mtd, NAND_CMD_READ0, 0,
745 page_addr);
746
747 host->col_addr = column - mtd->writesize;
748 host->spare_only = true;
749
750 /* Set program pointer to spare region */
751 if (!host->pagesize_2k)
752 send_cmd(host, NAND_CMD_READOOB, false);
753 } else {
754 host->spare_only = false;
755 host->col_addr = column;
756
757 /* Set program pointer to page start */
758 if (!host->pagesize_2k)
759 send_cmd(host, NAND_CMD_READ0, false);
760 }
761 useirq = false;
762 break;
763
764 case NAND_CMD_PAGEPROG:
765 send_prog_page(host, 0, host->spare_only);
766
767 if (host->pagesize_2k) {
768 /* data in 4 areas datas */
769 send_prog_page(host, 1, host->spare_only);
770 send_prog_page(host, 2, host->spare_only);
771 send_prog_page(host, 3, host->spare_only);
772 }
773
774 break;
775 493
776 case NAND_CMD_ERASE1: 494 /* the last section */
777 useirq = false; 495 memcpy(&s[i * t], &d[i * j], mtd->oobsize - i * j);
778 break;
779 } 496 }
497}
780 498
781 /* Write out the command to the device. */ 499static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
782 send_cmd(host, command, useirq); 500{
501 struct nand_chip *nand_chip = mtd->priv;
502 struct mxc_nand_host *host = nand_chip->priv;
783 503
784 /* Write out column address, if necessary */ 504 /* Write out column address, if necessary */
785 if (column != -1) { 505 if (column != -1) {
@@ -791,7 +511,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
791 * the full page. 511 * the full page.
792 */ 512 */
793 send_addr(host, 0, page_addr == -1); 513 send_addr(host, 0, page_addr == -1);
794 if (host->pagesize_2k) 514 if (mtd->writesize > 512)
795 /* another col addr cycle for 2k page */ 515 /* another col addr cycle for 2k page */
796 send_addr(host, 0, false); 516 send_addr(host, 0, false);
797 } 517 }
@@ -801,7 +521,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
801 /* paddr_0 - p_addr_7 */ 521 /* paddr_0 - p_addr_7 */
802 send_addr(host, (page_addr & 0xff), false); 522 send_addr(host, (page_addr & 0xff), false);
803 523
804 if (host->pagesize_2k) { 524 if (mtd->writesize > 512) {
805 if (mtd->size >= 0x10000000) { 525 if (mtd->size >= 0x10000000) {
806 /* paddr_8 - paddr_15 */ 526 /* paddr_8 - paddr_15 */
807 send_addr(host, (page_addr >> 8) & 0xff, false); 527 send_addr(host, (page_addr >> 8) & 0xff, false);
@@ -820,43 +540,138 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
820 send_addr(host, (page_addr >> 8) & 0xff, true); 540 send_addr(host, (page_addr >> 8) & 0xff, true);
821 } 541 }
822 } 542 }
543}
544
545/* Used by the upper layer to write command to NAND Flash for
546 * different operations to be carried out on NAND Flash */
547static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
548 int column, int page_addr)
549{
550 struct nand_chip *nand_chip = mtd->priv;
551 struct mxc_nand_host *host = nand_chip->priv;
552
553 DEBUG(MTD_DEBUG_LEVEL3,
554 "mxc_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n",
555 command, column, page_addr);
556
557 /* Reset command state information */
558 host->status_request = false;
823 559
824 /* Command post-processing step */ 560 /* Command pre-processing step */
825 switch (command) { 561 switch (command) {
826 562
827 case NAND_CMD_RESET: 563 case NAND_CMD_STATUS:
564 host->buf_start = 0;
565 host->status_request = true;
566
567 send_cmd(host, command, true);
568 mxc_do_addr_cycle(mtd, column, page_addr);
828 break; 569 break;
829 570
830 case NAND_CMD_READOOB:
831 case NAND_CMD_READ0: 571 case NAND_CMD_READ0:
832 if (host->pagesize_2k) { 572 case NAND_CMD_READOOB:
833 /* send read confirm command */ 573 if (command == NAND_CMD_READ0)
574 host->buf_start = column;
575 else
576 host->buf_start = column + mtd->writesize;
577
578 if (mtd->writesize > 512)
579 command = NAND_CMD_READ0; /* only READ0 is valid */
580
581 send_cmd(host, command, false);
582 mxc_do_addr_cycle(mtd, column, page_addr);
583
584 if (mtd->writesize > 512)
834 send_cmd(host, NAND_CMD_READSTART, true); 585 send_cmd(host, NAND_CMD_READSTART, true);
835 /* read for each AREA */ 586
836 send_read_page(host, 0, host->spare_only); 587 send_page(mtd, NFC_OUTPUT);
837 send_read_page(host, 1, host->spare_only); 588
838 send_read_page(host, 2, host->spare_only); 589 memcpy(host->data_buf, host->main_area0, mtd->writesize);
839 send_read_page(host, 3, host->spare_only); 590 copy_spare(mtd, true);
840 } else
841 send_read_page(host, 0, host->spare_only);
842 break; 591 break;
843 592
844 case NAND_CMD_READID: 593 case NAND_CMD_SEQIN:
845 host->col_addr = 0; 594 if (column >= mtd->writesize) {
846 send_read_id(host); 595 /*
596 * FIXME: before send SEQIN command for write OOB,
597 * We must read one page out.
598 * For K9F1GXX has no READ1 command to set current HW
599 * pointer to spare area, we must write the whole page
600 * including OOB together.
601 */
602 if (mtd->writesize > 512)
603 /* call ourself to read a page */
604 mxc_nand_command(mtd, NAND_CMD_READ0, 0,
605 page_addr);
606
607 host->buf_start = column;
608
609 /* Set program pointer to spare region */
610 if (mtd->writesize == 512)
611 send_cmd(host, NAND_CMD_READOOB, false);
612 } else {
613 host->buf_start = column;
614
615 /* Set program pointer to page start */
616 if (mtd->writesize == 512)
617 send_cmd(host, NAND_CMD_READ0, false);
618 }
619
620 send_cmd(host, command, false);
621 mxc_do_addr_cycle(mtd, column, page_addr);
847 break; 622 break;
848 623
849 case NAND_CMD_PAGEPROG: 624 case NAND_CMD_PAGEPROG:
625 memcpy(host->main_area0, host->data_buf, mtd->writesize);
626 copy_spare(mtd, false);
627 send_page(mtd, NFC_INPUT);
628 send_cmd(host, command, true);
629 mxc_do_addr_cycle(mtd, column, page_addr);
850 break; 630 break;
851 631
852 case NAND_CMD_STATUS: 632 case NAND_CMD_READID:
633 send_cmd(host, command, true);
634 mxc_do_addr_cycle(mtd, column, page_addr);
635 send_read_id(host);
636 host->buf_start = column;
853 break; 637 break;
854 638
639 case NAND_CMD_ERASE1:
855 case NAND_CMD_ERASE2: 640 case NAND_CMD_ERASE2:
641 send_cmd(host, command, false);
642 mxc_do_addr_cycle(mtd, column, page_addr);
643
856 break; 644 break;
857 } 645 }
858} 646}
859 647
648/*
649 * The generic flash bbt decriptors overlap with our ecc
650 * hardware, so define some i.MX specific ones.
651 */
652static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
653static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' };
654
655static struct nand_bbt_descr bbt_main_descr = {
656 .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
657 | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
658 .offs = 0,
659 .len = 4,
660 .veroffs = 4,
661 .maxblocks = 4,
662 .pattern = bbt_pattern,
663};
664
665static struct nand_bbt_descr bbt_mirror_descr = {
666 .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
667 | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
668 .offs = 0,
669 .len = 4,
670 .veroffs = 4,
671 .maxblocks = 4,
672 .pattern = mirror_pattern,
673};
674
860static int __init mxcnd_probe(struct platform_device *pdev) 675static int __init mxcnd_probe(struct platform_device *pdev)
861{ 676{
862 struct nand_chip *this; 677 struct nand_chip *this;
@@ -866,12 +681,16 @@ static int __init mxcnd_probe(struct platform_device *pdev)
866 struct resource *res; 681 struct resource *res;
867 uint16_t tmp; 682 uint16_t tmp;
868 int err = 0, nr_parts = 0; 683 int err = 0, nr_parts = 0;
684 struct nand_ecclayout *oob_smallpage, *oob_largepage;
869 685
870 /* Allocate memory for MTD device structure and private data */ 686 /* Allocate memory for MTD device structure and private data */
871 host = kzalloc(sizeof(struct mxc_nand_host), GFP_KERNEL); 687 host = kzalloc(sizeof(struct mxc_nand_host) + NAND_MAX_PAGESIZE +
688 NAND_MAX_OOBSIZE, GFP_KERNEL);
872 if (!host) 689 if (!host)
873 return -ENOMEM; 690 return -ENOMEM;
874 691
692 host->data_buf = (uint8_t *)(host + 1);
693
875 host->dev = &pdev->dev; 694 host->dev = &pdev->dev;
876 /* structures must be linked */ 695 /* structures must be linked */
877 this = &host->nand; 696 this = &host->nand;
@@ -879,7 +698,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
879 mtd->priv = this; 698 mtd->priv = this;
880 mtd->owner = THIS_MODULE; 699 mtd->owner = THIS_MODULE;
881 mtd->dev.parent = &pdev->dev; 700 mtd->dev.parent = &pdev->dev;
882 mtd->name = "mxc_nand"; 701 mtd->name = DRIVER_NAME;
883 702
884 /* 50 us command delay time */ 703 /* 50 us command delay time */
885 this->chip_delay = 5; 704 this->chip_delay = 5;
@@ -909,62 +728,93 @@ static int __init mxcnd_probe(struct platform_device *pdev)
909 goto eres; 728 goto eres;
910 } 729 }
911 730
912 host->regs = ioremap(res->start, res->end - res->start + 1); 731 host->base = ioremap(res->start, resource_size(res));
913 if (!host->regs) { 732 if (!host->base) {
914 err = -ENOMEM; 733 err = -ENOMEM;
915 goto eres; 734 goto eres;
916 } 735 }
917 736
737 host->main_area0 = host->base;
738 host->main_area1 = host->base + 0x200;
739
740 if (nfc_is_v21()) {
741 host->regs = host->base + 0x1000;
742 host->spare0 = host->base + 0x1000;
743 host->spare_len = 64;
744 oob_smallpage = &nandv2_hw_eccoob_smallpage;
745 oob_largepage = &nandv2_hw_eccoob_largepage;
746 } else if (nfc_is_v1()) {
747 host->regs = host->base;
748 host->spare0 = host->base + 0x800;
749 host->spare_len = 16;
750 oob_smallpage = &nandv1_hw_eccoob_smallpage;
751 oob_largepage = &nandv1_hw_eccoob_largepage;
752 } else
753 BUG();
754
755 /* disable interrupt and spare enable */
918 tmp = readw(host->regs + NFC_CONFIG1); 756 tmp = readw(host->regs + NFC_CONFIG1);
919 tmp |= NFC_INT_MSK; 757 tmp |= NFC_INT_MSK;
758 tmp &= ~NFC_SP_EN;
920 writew(tmp, host->regs + NFC_CONFIG1); 759 writew(tmp, host->regs + NFC_CONFIG1);
921 760
922 init_waitqueue_head(&host->irq_waitq); 761 init_waitqueue_head(&host->irq_waitq);
923 762
924 host->irq = platform_get_irq(pdev, 0); 763 host->irq = platform_get_irq(pdev, 0);
925 764
926 err = request_irq(host->irq, mxc_nfc_irq, 0, "mxc_nd", host); 765 err = request_irq(host->irq, mxc_nfc_irq, 0, DRIVER_NAME, host);
927 if (err) 766 if (err)
928 goto eirq; 767 goto eirq;
929 768
769 /* Reset NAND */
770 this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
771
772 /* preset operation */
773 /* Unlock the internal RAM Buffer */
774 writew(0x2, host->regs + NFC_CONFIG);
775
776 /* Blocks to be unlocked */
777 if (nfc_is_v21()) {
778 writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR);
779 writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR);
780 this->ecc.bytes = 9;
781 } else if (nfc_is_v1()) {
782 writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR);
783 writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR);
784 this->ecc.bytes = 3;
785 } else
786 BUG();
787
788 /* Unlock Block Command for given address range */
789 writew(0x4, host->regs + NFC_WRPROT);
790
791 this->ecc.size = 512;
792 this->ecc.layout = oob_smallpage;
793
930 if (pdata->hw_ecc) { 794 if (pdata->hw_ecc) {
931 this->ecc.calculate = mxc_nand_calculate_ecc; 795 this->ecc.calculate = mxc_nand_calculate_ecc;
932 this->ecc.hwctl = mxc_nand_enable_hwecc; 796 this->ecc.hwctl = mxc_nand_enable_hwecc;
933 this->ecc.correct = mxc_nand_correct_data; 797 this->ecc.correct = mxc_nand_correct_data;
934 this->ecc.mode = NAND_ECC_HW; 798 this->ecc.mode = NAND_ECC_HW;
935 this->ecc.size = 512;
936 this->ecc.bytes = 3;
937 tmp = readw(host->regs + NFC_CONFIG1); 799 tmp = readw(host->regs + NFC_CONFIG1);
938 tmp |= NFC_ECC_EN; 800 tmp |= NFC_ECC_EN;
939 writew(tmp, host->regs + NFC_CONFIG1); 801 writew(tmp, host->regs + NFC_CONFIG1);
940 } else { 802 } else {
941 this->ecc.size = 512;
942 this->ecc.bytes = 3;
943 this->ecc.layout = &nand_hw_eccoob_8;
944 this->ecc.mode = NAND_ECC_SOFT; 803 this->ecc.mode = NAND_ECC_SOFT;
945 tmp = readw(host->regs + NFC_CONFIG1); 804 tmp = readw(host->regs + NFC_CONFIG1);
946 tmp &= ~NFC_ECC_EN; 805 tmp &= ~NFC_ECC_EN;
947 writew(tmp, host->regs + NFC_CONFIG1); 806 writew(tmp, host->regs + NFC_CONFIG1);
948 } 807 }
949 808
950 /* Reset NAND */
951 this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
952
953 /* preset operation */
954 /* Unlock the internal RAM Buffer */
955 writew(0x2, host->regs + NFC_CONFIG);
956
957 /* Blocks to be unlocked */
958 writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR);
959 writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR);
960
961 /* Unlock Block Command for given address range */
962 writew(0x4, host->regs + NFC_WRPROT);
963
964 /* NAND bus width determines access funtions used by upper layer */ 809 /* NAND bus width determines access funtions used by upper layer */
965 if (pdata->width == 2) { 810 if (pdata->width == 2)
966 this->options |= NAND_BUSWIDTH_16; 811 this->options |= NAND_BUSWIDTH_16;
967 this->ecc.layout = &nand_hw_eccoob_16; 812
813 if (pdata->flash_bbt) {
814 this->bbt_td = &bbt_main_descr;
815 this->bbt_md = &bbt_mirror_descr;
816 /* update flash based bbt */
817 this->options |= NAND_USE_FLASH_BBT;
968 } 818 }
969 819
970 /* first scan to find the device and get the page size */ 820 /* first scan to find the device and get the page size */
@@ -973,35 +823,8 @@ static int __init mxcnd_probe(struct platform_device *pdev)
973 goto escan; 823 goto escan;
974 } 824 }
975 825
976 host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0; 826 if (mtd->writesize == 2048)
977 827 this->ecc.layout = oob_largepage;
978 if (this->ecc.mode == NAND_ECC_HW) {
979 switch (mtd->oobsize) {
980 case 8:
981 this->ecc.layout = &nand_hw_eccoob_8;
982 break;
983 case 16:
984 this->ecc.layout = &nand_hw_eccoob_16;
985 break;
986 case 64:
987 this->ecc.layout = &nand_hw_eccoob_64;
988 break;
989 default:
990 /* page size not handled by HW ECC */
991 /* switching back to soft ECC */
992 this->ecc.size = 512;
993 this->ecc.bytes = 3;
994 this->ecc.layout = &nand_hw_eccoob_8;
995 this->ecc.mode = NAND_ECC_SOFT;
996 this->ecc.calculate = NULL;
997 this->ecc.correct = NULL;
998 this->ecc.hwctl = NULL;
999 tmp = readw(host->regs + NFC_CONFIG1);
1000 tmp &= ~NFC_ECC_EN;
1001 writew(tmp, host->regs + NFC_CONFIG1);
1002 break;
1003 }
1004 }
1005 828
1006 /* second phase scan */ 829 /* second phase scan */
1007 if (nand_scan_tail(mtd)) { 830 if (nand_scan_tail(mtd)) {
@@ -1029,7 +852,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
1029escan: 852escan:
1030 free_irq(host->irq, host); 853 free_irq(host->irq, host);
1031eirq: 854eirq:
1032 iounmap(host->regs); 855 iounmap(host->base);
1033eres: 856eres:
1034 clk_put(host->clk); 857 clk_put(host->clk);
1035eclk: 858eclk:
@@ -1048,7 +871,7 @@ static int __exit mxcnd_remove(struct platform_device *pdev)
1048 871
1049 nand_release(&host->mtd); 872 nand_release(&host->mtd);
1050 free_irq(host->irq, host); 873 free_irq(host->irq, host);
1051 iounmap(host->regs); 874 iounmap(host->base);
1052 kfree(host); 875 kfree(host);
1053 876
1054 return 0; 877 return 0;
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-29 07:21:52 -0500