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Linux 4.16.11
[linux/fpc-iii.git] / drivers / mtd / onenand / samsung.c
blob2e9d076e445a1ec328a281b768462125a5f601cc
1 /*
2 * Samsung S3C64XX/S5PC1XX OneNAND driver
3 *
4 * Copyright © 2008-2010 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 * Marek Szyprowski <m.szyprowski@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Implementation:
13 * S3C64XX: emulate the pseudo BufferRAM
14 * S5PC110: use DMA
15 */
16
17 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/sched.h>
20 #include <linux/slab.h>
21 #include <linux/mtd/mtd.h>
22 #include <linux/mtd/onenand.h>
23 #include <linux/mtd/partitions.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/interrupt.h>
26 #include <linux/io.h>
27
28 #include "samsung.h"
29
30 enum soc_type {
31 TYPE_S3C6400,
32 TYPE_S3C6410,
33 TYPE_S5PC110,
34 };
35
36 #define ONENAND_ERASE_STATUS 0x00
37 #define ONENAND_MULTI_ERASE_SET 0x01
38 #define ONENAND_ERASE_START 0x03
39 #define ONENAND_UNLOCK_START 0x08
40 #define ONENAND_UNLOCK_END 0x09
41 #define ONENAND_LOCK_START 0x0A
42 #define ONENAND_LOCK_END 0x0B
43 #define ONENAND_LOCK_TIGHT_START 0x0C
44 #define ONENAND_LOCK_TIGHT_END 0x0D
45 #define ONENAND_UNLOCK_ALL 0x0E
46 #define ONENAND_OTP_ACCESS 0x12
47 #define ONENAND_SPARE_ACCESS_ONLY 0x13
48 #define ONENAND_MAIN_ACCESS_ONLY 0x14
49 #define ONENAND_ERASE_VERIFY 0x15
50 #define ONENAND_MAIN_SPARE_ACCESS 0x16
51 #define ONENAND_PIPELINE_READ 0x4000
52
53 #define MAP_00 (0x0)
54 #define MAP_01 (0x1)
55 #define MAP_10 (0x2)
56 #define MAP_11 (0x3)
57
58 #define S3C64XX_CMD_MAP_SHIFT 24
59
60 #define S3C6400_FBA_SHIFT 10
61 #define S3C6400_FPA_SHIFT 4
62 #define S3C6400_FSA_SHIFT 2
63
64 #define S3C6410_FBA_SHIFT 12
65 #define S3C6410_FPA_SHIFT 6
66 #define S3C6410_FSA_SHIFT 4
67
68 /* S5PC110 specific definitions */
69 #define S5PC110_DMA_SRC_ADDR 0x400
70 #define S5PC110_DMA_SRC_CFG 0x404
71 #define S5PC110_DMA_DST_ADDR 0x408
72 #define S5PC110_DMA_DST_CFG 0x40C
73 #define S5PC110_DMA_TRANS_SIZE 0x414
74 #define S5PC110_DMA_TRANS_CMD 0x418
75 #define S5PC110_DMA_TRANS_STATUS 0x41C
76 #define S5PC110_DMA_TRANS_DIR 0x420
77 #define S5PC110_INTC_DMA_CLR 0x1004
78 #define S5PC110_INTC_ONENAND_CLR 0x1008
79 #define S5PC110_INTC_DMA_MASK 0x1024
80 #define S5PC110_INTC_ONENAND_MASK 0x1028
81 #define S5PC110_INTC_DMA_PEND 0x1044
82 #define S5PC110_INTC_ONENAND_PEND 0x1048
83 #define S5PC110_INTC_DMA_STATUS 0x1064
84 #define S5PC110_INTC_ONENAND_STATUS 0x1068
85
86 #define S5PC110_INTC_DMA_TD (1 << 24)
87 #define S5PC110_INTC_DMA_TE (1 << 16)
88
89 #define S5PC110_DMA_CFG_SINGLE (0x0 << 16)
90 #define S5PC110_DMA_CFG_4BURST (0x2 << 16)
91 #define S5PC110_DMA_CFG_8BURST (0x3 << 16)
92 #define S5PC110_DMA_CFG_16BURST (0x4 << 16)
93
94 #define S5PC110_DMA_CFG_INC (0x0 << 8)
95 #define S5PC110_DMA_CFG_CNT (0x1 << 8)
96
97 #define S5PC110_DMA_CFG_8BIT (0x0 << 0)
98 #define S5PC110_DMA_CFG_16BIT (0x1 << 0)
99 #define S5PC110_DMA_CFG_32BIT (0x2 << 0)
100
101 #define S5PC110_DMA_SRC_CFG_READ (S5PC110_DMA_CFG_16BURST | \
102 S5PC110_DMA_CFG_INC | \
103 S5PC110_DMA_CFG_16BIT)
104 #define S5PC110_DMA_DST_CFG_READ (S5PC110_DMA_CFG_16BURST | \
105 S5PC110_DMA_CFG_INC | \
106 S5PC110_DMA_CFG_32BIT)
107 #define S5PC110_DMA_SRC_CFG_WRITE (S5PC110_DMA_CFG_16BURST | \
108 S5PC110_DMA_CFG_INC | \
109 S5PC110_DMA_CFG_32BIT)
110 #define S5PC110_DMA_DST_CFG_WRITE (S5PC110_DMA_CFG_16BURST | \
111 S5PC110_DMA_CFG_INC | \
112 S5PC110_DMA_CFG_16BIT)
113
114 #define S5PC110_DMA_TRANS_CMD_TDC (0x1 << 18)
115 #define S5PC110_DMA_TRANS_CMD_TEC (0x1 << 16)
116 #define S5PC110_DMA_TRANS_CMD_TR (0x1 << 0)
117
118 #define S5PC110_DMA_TRANS_STATUS_TD (0x1 << 18)
119 #define S5PC110_DMA_TRANS_STATUS_TB (0x1 << 17)
120 #define S5PC110_DMA_TRANS_STATUS_TE (0x1 << 16)
121
122 #define S5PC110_DMA_DIR_READ 0x0
123 #define S5PC110_DMA_DIR_WRITE 0x1
124
125 struct s3c_onenand {
126 struct mtd_info *mtd;
127 struct platform_device *pdev;
128 enum soc_type type;
129 void __iomem *base;
130 void __iomem *ahb_addr;
131 int bootram_command;
132 void *page_buf;
133 void *oob_buf;
134 unsigned int (*mem_addr)(int fba, int fpa, int fsa);
135 unsigned int (*cmd_map)(unsigned int type, unsigned int val);
136 void __iomem *dma_addr;
137 unsigned long phys_base;
138 struct completion complete;
139 };
140
141 #define CMD_MAP_00(dev, addr) (dev->cmd_map(MAP_00, ((addr) << 1)))
142 #define CMD_MAP_01(dev, mem_addr) (dev->cmd_map(MAP_01, (mem_addr)))
143 #define CMD_MAP_10(dev, mem_addr) (dev->cmd_map(MAP_10, (mem_addr)))
144 #define CMD_MAP_11(dev, addr) (dev->cmd_map(MAP_11, ((addr) << 2)))
145
146 static struct s3c_onenand *onenand;
147
148 static inline int s3c_read_reg(int offset)
149 {
150 return readl(onenand->base + offset);
151 }
152
153 static inline void s3c_write_reg(int value, int offset)
154 {
155 writel(value, onenand->base + offset);
156 }
157
158 static inline int s3c_read_cmd(unsigned int cmd)
159 {
160 return readl(onenand->ahb_addr + cmd);
161 }
162
163 static inline void s3c_write_cmd(int value, unsigned int cmd)
164 {
165 writel(value, onenand->ahb_addr + cmd);
166 }
167
168 #ifdef SAMSUNG_DEBUG
169 static void s3c_dump_reg(void)
170 {
171 int i;
172
173 for (i = 0; i < 0x400; i += 0x40) {
174 printk(KERN_INFO "0x%08X: 0x%08x 0x%08x 0x%08x 0x%08x\n",
175 (unsigned int) onenand->base + i,
176 s3c_read_reg(i), s3c_read_reg(i + 0x10),
177 s3c_read_reg(i + 0x20), s3c_read_reg(i + 0x30));
178 }
179 }
180 #endif
181
182 static unsigned int s3c64xx_cmd_map(unsigned type, unsigned val)
183 {
184 return (type << S3C64XX_CMD_MAP_SHIFT) | val;
185 }
186
187 static unsigned int s3c6400_mem_addr(int fba, int fpa, int fsa)
188 {
189 return (fba << S3C6400_FBA_SHIFT) | (fpa << S3C6400_FPA_SHIFT) |
190 (fsa << S3C6400_FSA_SHIFT);
191 }
192
193 static unsigned int s3c6410_mem_addr(int fba, int fpa, int fsa)
194 {
195 return (fba << S3C6410_FBA_SHIFT) | (fpa << S3C6410_FPA_SHIFT) |
196 (fsa << S3C6410_FSA_SHIFT);
197 }
198
199 static void s3c_onenand_reset(void)
200 {
201 unsigned long timeout = 0x10000;
202 int stat;
203
204 s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET);
205 while (1 && timeout--) {
206 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
207 if (stat & RST_CMP)
208 break;
209 }
210 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
211 s3c_write_reg(stat, INT_ERR_ACK_OFFSET);
212
213 /* Clear interrupt */
214 s3c_write_reg(0x0, INT_ERR_ACK_OFFSET);
215 /* Clear the ECC status */
216 s3c_write_reg(0x0, ECC_ERR_STAT_OFFSET);
217 }
218
219 static unsigned short s3c_onenand_readw(void __iomem *addr)
220 {
221 struct onenand_chip *this = onenand->mtd->priv;
222 struct device *dev = &onenand->pdev->dev;
223 int reg = addr - this->base;
224 int word_addr = reg >> 1;
225 int value;
226
227 /* It's used for probing time */
228 switch (reg) {
229 case ONENAND_REG_MANUFACTURER_ID:
230 return s3c_read_reg(MANUFACT_ID_OFFSET);
231 case ONENAND_REG_DEVICE_ID:
232 return s3c_read_reg(DEVICE_ID_OFFSET);
233 case ONENAND_REG_VERSION_ID:
234 return s3c_read_reg(FLASH_VER_ID_OFFSET);
235 case ONENAND_REG_DATA_BUFFER_SIZE:
236 return s3c_read_reg(DATA_BUF_SIZE_OFFSET);
237 case ONENAND_REG_TECHNOLOGY:
238 return s3c_read_reg(TECH_OFFSET);
239 case ONENAND_REG_SYS_CFG1:
240 return s3c_read_reg(MEM_CFG_OFFSET);
241
242 /* Used at unlock all status */
243 case ONENAND_REG_CTRL_STATUS:
244 return 0;
245
246 case ONENAND_REG_WP_STATUS:
247 return ONENAND_WP_US;
248
249 default:
250 break;
251 }
252
253 /* BootRAM access control */
254 if ((unsigned int) addr < ONENAND_DATARAM && onenand->bootram_command) {
255 if (word_addr == 0)
256 return s3c_read_reg(MANUFACT_ID_OFFSET);
257 if (word_addr == 1)
258 return s3c_read_reg(DEVICE_ID_OFFSET);
259 if (word_addr == 2)
260 return s3c_read_reg(FLASH_VER_ID_OFFSET);
261 }
262
263 value = s3c_read_cmd(CMD_MAP_11(onenand, word_addr)) & 0xffff;
264 dev_info(dev, "%s: Illegal access at reg 0x%x, value 0x%x\n", __func__,
265 word_addr, value);
266 return value;
267 }
268
269 static void s3c_onenand_writew(unsigned short value, void __iomem *addr)
270 {
271 struct onenand_chip *this = onenand->mtd->priv;
272 struct device *dev = &onenand->pdev->dev;
273 unsigned int reg = addr - this->base;
274 unsigned int word_addr = reg >> 1;
275
276 /* It's used for probing time */
277 switch (reg) {
278 case ONENAND_REG_SYS_CFG1:
279 s3c_write_reg(value, MEM_CFG_OFFSET);
280 return;
281
282 case ONENAND_REG_START_ADDRESS1:
283 case ONENAND_REG_START_ADDRESS2:
284 return;
285
286 /* Lock/lock-tight/unlock/unlock_all */
287 case ONENAND_REG_START_BLOCK_ADDRESS:
288 return;
289
290 default:
291 break;
292 }
293
294 /* BootRAM access control */
295 if ((unsigned int)addr < ONENAND_DATARAM) {
296 if (value == ONENAND_CMD_READID) {
297 onenand->bootram_command = 1;
298 return;
299 }
300 if (value == ONENAND_CMD_RESET) {
301 s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET);
302 onenand->bootram_command = 0;
303 return;
304 }
305 }
306
307 dev_info(dev, "%s: Illegal access at reg 0x%x, value 0x%x\n", __func__,
308 word_addr, value);
309
310 s3c_write_cmd(value, CMD_MAP_11(onenand, word_addr));
311 }
312
313 static int s3c_onenand_wait(struct mtd_info *mtd, int state)
314 {
315 struct device *dev = &onenand->pdev->dev;
316 unsigned int flags = INT_ACT;
317 unsigned int stat, ecc;
318 unsigned long timeout;
319
320 switch (state) {
321 case FL_READING:
322 flags |= BLK_RW_CMP | LOAD_CMP;
323 break;
324 case FL_WRITING:
325 flags |= BLK_RW_CMP | PGM_CMP;
326 break;
327 case FL_ERASING:
328 flags |= BLK_RW_CMP | ERS_CMP;
329 break;
330 case FL_LOCKING:
331 flags |= BLK_RW_CMP;
332 break;
333 default:
334 break;
335 }
336
337 /* The 20 msec is enough */
338 timeout = jiffies + msecs_to_jiffies(20);
339 while (time_before(jiffies, timeout)) {
340 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
341 if (stat & flags)
342 break;
343
344 if (state != FL_READING)
345 cond_resched();
346 }
347 /* To get correct interrupt status in timeout case */
348 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
349 s3c_write_reg(stat, INT_ERR_ACK_OFFSET);
350
351 /*
352 * In the Spec. it checks the controller status first
353 * However if you get the correct information in case of
354 * power off recovery (POR) test, it should read ECC status first
355 */
356 if (stat & LOAD_CMP) {
357 ecc = s3c_read_reg(ECC_ERR_STAT_OFFSET);
358 if (ecc & ONENAND_ECC_4BIT_UNCORRECTABLE) {
359 dev_info(dev, "%s: ECC error = 0x%04x\n", __func__,
360 ecc);
361 mtd->ecc_stats.failed++;
362 return -EBADMSG;
363 }
364 }
365
366 if (stat & (LOCKED_BLK | ERS_FAIL | PGM_FAIL | LD_FAIL_ECC_ERR)) {
367 dev_info(dev, "%s: controller error = 0x%04x\n", __func__,
368 stat);
369 if (stat & LOCKED_BLK)
370 dev_info(dev, "%s: it's locked error = 0x%04x\n",
371 __func__, stat);
372
373 return -EIO;
374 }
375
376 return 0;
377 }
378
379 static int s3c_onenand_command(struct mtd_info *mtd, int cmd, loff_t addr,
380 size_t len)
381 {
382 struct onenand_chip *this = mtd->priv;
383 unsigned int *m, *s;
384 int fba, fpa, fsa = 0;
385 unsigned int mem_addr, cmd_map_01, cmd_map_10;
386 int i, mcount, scount;
387 int index;
388
389 fba = (int) (addr >> this->erase_shift);
390 fpa = (int) (addr >> this->page_shift);
391 fpa &= this->page_mask;
392
393 mem_addr = onenand->mem_addr(fba, fpa, fsa);
394 cmd_map_01 = CMD_MAP_01(onenand, mem_addr);
395 cmd_map_10 = CMD_MAP_10(onenand, mem_addr);
396
397 switch (cmd) {
398 case ONENAND_CMD_READ:
399 case ONENAND_CMD_READOOB:
400 case ONENAND_CMD_BUFFERRAM:
401 ONENAND_SET_NEXT_BUFFERRAM(this);
402 default:
403 break;
404 }
405
406 index = ONENAND_CURRENT_BUFFERRAM(this);
407
408 /*
409 * Emulate Two BufferRAMs and access with 4 bytes pointer
410 */
411 m = onenand->page_buf;
412 s = onenand->oob_buf;
413
414 if (index) {
415 m += (this->writesize >> 2);
416 s += (mtd->oobsize >> 2);
417 }
418
419 mcount = mtd->writesize >> 2;
420 scount = mtd->oobsize >> 2;
421
422 switch (cmd) {
423 case ONENAND_CMD_READ:
424 /* Main */
425 for (i = 0; i < mcount; i++)
426 *m++ = s3c_read_cmd(cmd_map_01);
427 return 0;
428
429 case ONENAND_CMD_READOOB:
430 s3c_write_reg(TSRF, TRANS_SPARE_OFFSET);
431 /* Main */
432 for (i = 0; i < mcount; i++)
433 *m++ = s3c_read_cmd(cmd_map_01);
434
435 /* Spare */
436 for (i = 0; i < scount; i++)
437 *s++ = s3c_read_cmd(cmd_map_01);
438
439 s3c_write_reg(0, TRANS_SPARE_OFFSET);
440 return 0;
441
442 case ONENAND_CMD_PROG:
443 /* Main */
444 for (i = 0; i < mcount; i++)
445 s3c_write_cmd(*m++, cmd_map_01);
446 return 0;
447
448 case ONENAND_CMD_PROGOOB:
449 s3c_write_reg(TSRF, TRANS_SPARE_OFFSET);
450
451 /* Main - dummy write */
452 for (i = 0; i < mcount; i++)
453 s3c_write_cmd(0xffffffff, cmd_map_01);
454
455 /* Spare */
456 for (i = 0; i < scount; i++)
457 s3c_write_cmd(*s++, cmd_map_01);
458
459 s3c_write_reg(0, TRANS_SPARE_OFFSET);
460 return 0;
461
462 case ONENAND_CMD_UNLOCK_ALL:
463 s3c_write_cmd(ONENAND_UNLOCK_ALL, cmd_map_10);
464 return 0;
465
466 case ONENAND_CMD_ERASE:
467 s3c_write_cmd(ONENAND_ERASE_START, cmd_map_10);
468 return 0;
469
470 default:
471 break;
472 }
473
474 return 0;
475 }
476
477 static unsigned char *s3c_get_bufferram(struct mtd_info *mtd, int area)
478 {
479 struct onenand_chip *this = mtd->priv;
480 int index = ONENAND_CURRENT_BUFFERRAM(this);
481 unsigned char *p;
482
483 if (area == ONENAND_DATARAM) {
484 p = onenand->page_buf;
485 if (index == 1)
486 p += this->writesize;
487 } else {
488 p = onenand->oob_buf;
489 if (index == 1)
490 p += mtd->oobsize;
491 }
492
493 return p;
494 }
495
496 static int onenand_read_bufferram(struct mtd_info *mtd, int area,
497 unsigned char *buffer, int offset,
498 size_t count)
499 {
500 unsigned char *p;
501
502 p = s3c_get_bufferram(mtd, area);
503 memcpy(buffer, p + offset, count);
504 return 0;
505 }
506
507 static int onenand_write_bufferram(struct mtd_info *mtd, int area,
508 const unsigned char *buffer, int offset,
509 size_t count)
510 {
511 unsigned char *p;
512
513 p = s3c_get_bufferram(mtd, area);
514 memcpy(p + offset, buffer, count);
515 return 0;
516 }
517
518 static int (*s5pc110_dma_ops)(dma_addr_t dst, dma_addr_t src, size_t count, int direction);
519
520 static int s5pc110_dma_poll(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
521 {
522 void __iomem *base = onenand->dma_addr;
523 int status;
524 unsigned long timeout;
525
526 writel(src, base + S5PC110_DMA_SRC_ADDR);
527 writel(dst, base + S5PC110_DMA_DST_ADDR);
528
529 if (direction == S5PC110_DMA_DIR_READ) {
530 writel(S5PC110_DMA_SRC_CFG_READ, base + S5PC110_DMA_SRC_CFG);
531 writel(S5PC110_DMA_DST_CFG_READ, base + S5PC110_DMA_DST_CFG);
532 } else {
533 writel(S5PC110_DMA_SRC_CFG_WRITE, base + S5PC110_DMA_SRC_CFG);
534 writel(S5PC110_DMA_DST_CFG_WRITE, base + S5PC110_DMA_DST_CFG);
535 }
536
537 writel(count, base + S5PC110_DMA_TRANS_SIZE);
538 writel(direction, base + S5PC110_DMA_TRANS_DIR);
539
540 writel(S5PC110_DMA_TRANS_CMD_TR, base + S5PC110_DMA_TRANS_CMD);
541
542 /*
543 * There's no exact timeout values at Spec.
544 * In real case it takes under 1 msec.
545 * So 20 msecs are enough.
546 */
547 timeout = jiffies + msecs_to_jiffies(20);
548
549 do {
550 status = readl(base + S5PC110_DMA_TRANS_STATUS);
551 if (status & S5PC110_DMA_TRANS_STATUS_TE) {
552 writel(S5PC110_DMA_TRANS_CMD_TEC,
553 base + S5PC110_DMA_TRANS_CMD);
554 return -EIO;
555 }
556 } while (!(status & S5PC110_DMA_TRANS_STATUS_TD) &&
557 time_before(jiffies, timeout));
558
559 writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD);
560
561 return 0;
562 }
563
564 static irqreturn_t s5pc110_onenand_irq(int irq, void *data)
565 {
566 void __iomem *base = onenand->dma_addr;
567 int status, cmd = 0;
568
569 status = readl(base + S5PC110_INTC_DMA_STATUS);
570
571 if (likely(status & S5PC110_INTC_DMA_TD))
572 cmd = S5PC110_DMA_TRANS_CMD_TDC;
573
574 if (unlikely(status & S5PC110_INTC_DMA_TE))
575 cmd = S5PC110_DMA_TRANS_CMD_TEC;
576
577 writel(cmd, base + S5PC110_DMA_TRANS_CMD);
578 writel(status, base + S5PC110_INTC_DMA_CLR);
579
580 if (!onenand->complete.done)
581 complete(&onenand->complete);
582
583 return IRQ_HANDLED;
584 }
585
586 static int s5pc110_dma_irq(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
587 {
588 void __iomem *base = onenand->dma_addr;
589 int status;
590
591 status = readl(base + S5PC110_INTC_DMA_MASK);
592 if (status) {
593 status &= ~(S5PC110_INTC_DMA_TD | S5PC110_INTC_DMA_TE);
594 writel(status, base + S5PC110_INTC_DMA_MASK);
595 }
596
597 writel(src, base + S5PC110_DMA_SRC_ADDR);
598 writel(dst, base + S5PC110_DMA_DST_ADDR);
599
600 if (direction == S5PC110_DMA_DIR_READ) {
601 writel(S5PC110_DMA_SRC_CFG_READ, base + S5PC110_DMA_SRC_CFG);
602 writel(S5PC110_DMA_DST_CFG_READ, base + S5PC110_DMA_DST_CFG);
603 } else {
604 writel(S5PC110_DMA_SRC_CFG_WRITE, base + S5PC110_DMA_SRC_CFG);
605 writel(S5PC110_DMA_DST_CFG_WRITE, base + S5PC110_DMA_DST_CFG);
606 }
607
608 writel(count, base + S5PC110_DMA_TRANS_SIZE);
609 writel(direction, base + S5PC110_DMA_TRANS_DIR);
610
611 writel(S5PC110_DMA_TRANS_CMD_TR, base + S5PC110_DMA_TRANS_CMD);
612
613 wait_for_completion_timeout(&onenand->complete, msecs_to_jiffies(20));
614
615 return 0;
616 }
617
618 static int s5pc110_read_bufferram(struct mtd_info *mtd, int area,
619 unsigned char *buffer, int offset, size_t count)
620 {
621 struct onenand_chip *this = mtd->priv;
622 void __iomem *p;
623 void *buf = (void *) buffer;
624 dma_addr_t dma_src, dma_dst;
625 int err, ofs, page_dma = 0;
626 struct device *dev = &onenand->pdev->dev;
627
628 p = this->base + area;
629 if (ONENAND_CURRENT_BUFFERRAM(this)) {
630 if (area == ONENAND_DATARAM)
631 p += this->writesize;
632 else
633 p += mtd->oobsize;
634 }
635
636 if (offset & 3 || (size_t) buf & 3 ||
637 !onenand->dma_addr || count != mtd->writesize)
638 goto normal;
639
640 /* Handle vmalloc address */
641 if (buf >= high_memory) {
642 struct page *page;
643
644 if (((size_t) buf & PAGE_MASK) !=
645 ((size_t) (buf + count - 1) & PAGE_MASK))
646 goto normal;
647 page = vmalloc_to_page(buf);
648 if (!page)
649 goto normal;
650
651 /* Page offset */
652 ofs = ((size_t) buf & ~PAGE_MASK);
653 page_dma = 1;
654
655 /* DMA routine */
656 dma_src = onenand->phys_base + (p - this->base);
657 dma_dst = dma_map_page(dev, page, ofs, count, DMA_FROM_DEVICE);
658 } else {
659 /* DMA routine */
660 dma_src = onenand->phys_base + (p - this->base);
661 dma_dst = dma_map_single(dev, buf, count, DMA_FROM_DEVICE);
662 }
663 if (dma_mapping_error(dev, dma_dst)) {
664 dev_err(dev, "Couldn't map a %d byte buffer for DMA\n", count);
665 goto normal;
666 }
667 err = s5pc110_dma_ops(dma_dst, dma_src,
668 count, S5PC110_DMA_DIR_READ);
669
670 if (page_dma)
671 dma_unmap_page(dev, dma_dst, count, DMA_FROM_DEVICE);
672 else
673 dma_unmap_single(dev, dma_dst, count, DMA_FROM_DEVICE);
674
675 if (!err)
676 return 0;
677
678 normal:
679 if (count != mtd->writesize) {
680 /* Copy the bufferram to memory to prevent unaligned access */
681 memcpy(this->page_buf, p, mtd->writesize);
682 p = this->page_buf + offset;
683 }
684
685 memcpy(buffer, p, count);
686
687 return 0;
688 }
689
690 static int s5pc110_chip_probe(struct mtd_info *mtd)
691 {
692 /* Now just return 0 */
693 return 0;
694 }
695
696 static int s3c_onenand_bbt_wait(struct mtd_info *mtd, int state)
697 {
698 unsigned int flags = INT_ACT | LOAD_CMP;
699 unsigned int stat;
700 unsigned long timeout;
701
702 /* The 20 msec is enough */
703 timeout = jiffies + msecs_to_jiffies(20);
704 while (time_before(jiffies, timeout)) {
705 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
706 if (stat & flags)
707 break;
708 }
709 /* To get correct interrupt status in timeout case */
710 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
711 s3c_write_reg(stat, INT_ERR_ACK_OFFSET);
712
713 if (stat & LD_FAIL_ECC_ERR) {
714 s3c_onenand_reset();
715 return ONENAND_BBT_READ_ERROR;
716 }
717
718 if (stat & LOAD_CMP) {
719 int ecc = s3c_read_reg(ECC_ERR_STAT_OFFSET);
720 if (ecc & ONENAND_ECC_4BIT_UNCORRECTABLE) {
721 s3c_onenand_reset();
722 return ONENAND_BBT_READ_ERROR;
723 }
724 }
725
726 return 0;
727 }
728
729 static void s3c_onenand_check_lock_status(struct mtd_info *mtd)
730 {
731 struct onenand_chip *this = mtd->priv;
732 struct device *dev = &onenand->pdev->dev;
733 unsigned int block, end;
734 int tmp;
735
736 end = this->chipsize >> this->erase_shift;
737
738 for (block = 0; block < end; block++) {
739 unsigned int mem_addr = onenand->mem_addr(block, 0, 0);
740 tmp = s3c_read_cmd(CMD_MAP_01(onenand, mem_addr));
741
742 if (s3c_read_reg(INT_ERR_STAT_OFFSET) & LOCKED_BLK) {
743 dev_err(dev, "block %d is write-protected!\n", block);
744 s3c_write_reg(LOCKED_BLK, INT_ERR_ACK_OFFSET);
745 }
746 }
747 }
748
749 static void s3c_onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs,
750 size_t len, int cmd)
751 {
752 struct onenand_chip *this = mtd->priv;
753 int start, end, start_mem_addr, end_mem_addr;
754
755 start = ofs >> this->erase_shift;
756 start_mem_addr = onenand->mem_addr(start, 0, 0);
757 end = start + (len >> this->erase_shift) - 1;
758 end_mem_addr = onenand->mem_addr(end, 0, 0);
759
760 if (cmd == ONENAND_CMD_LOCK) {
761 s3c_write_cmd(ONENAND_LOCK_START, CMD_MAP_10(onenand,
762 start_mem_addr));
763 s3c_write_cmd(ONENAND_LOCK_END, CMD_MAP_10(onenand,
764 end_mem_addr));
765 } else {
766 s3c_write_cmd(ONENAND_UNLOCK_START, CMD_MAP_10(onenand,
767 start_mem_addr));
768 s3c_write_cmd(ONENAND_UNLOCK_END, CMD_MAP_10(onenand,
769 end_mem_addr));
770 }
771
772 this->wait(mtd, FL_LOCKING);
773 }
774
775 static void s3c_unlock_all(struct mtd_info *mtd)
776 {
777 struct onenand_chip *this = mtd->priv;
778 loff_t ofs = 0;
779 size_t len = this->chipsize;
780
781 if (this->options & ONENAND_HAS_UNLOCK_ALL) {
782 /* Write unlock command */
783 this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
784
785 /* No need to check return value */
786 this->wait(mtd, FL_LOCKING);
787
788 /* Workaround for all block unlock in DDP */
789 if (!ONENAND_IS_DDP(this)) {
790 s3c_onenand_check_lock_status(mtd);
791 return;
792 }
793
794 /* All blocks on another chip */
795 ofs = this->chipsize >> 1;
796 len = this->chipsize >> 1;
797 }
798
799 s3c_onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
800
801 s3c_onenand_check_lock_status(mtd);
802 }
803
804 static void s3c_onenand_setup(struct mtd_info *mtd)
805 {
806 struct onenand_chip *this = mtd->priv;
807
808 onenand->mtd = mtd;
809
810 if (onenand->type == TYPE_S3C6400) {
811 onenand->mem_addr = s3c6400_mem_addr;
812 onenand->cmd_map = s3c64xx_cmd_map;
813 } else if (onenand->type == TYPE_S3C6410) {
814 onenand->mem_addr = s3c6410_mem_addr;
815 onenand->cmd_map = s3c64xx_cmd_map;
816 } else if (onenand->type == TYPE_S5PC110) {
817 /* Use generic onenand functions */
818 this->read_bufferram = s5pc110_read_bufferram;
819 this->chip_probe = s5pc110_chip_probe;
820 return;
821 } else {
822 BUG();
823 }
824
825 this->read_word = s3c_onenand_readw;
826 this->write_word = s3c_onenand_writew;
827
828 this->wait = s3c_onenand_wait;
829 this->bbt_wait = s3c_onenand_bbt_wait;
830 this->unlock_all = s3c_unlock_all;
831 this->command = s3c_onenand_command;
832
833 this->read_bufferram = onenand_read_bufferram;
834 this->write_bufferram = onenand_write_bufferram;
835 }
836
837 static int s3c_onenand_probe(struct platform_device *pdev)
838 {
839 struct onenand_platform_data *pdata;
840 struct onenand_chip *this;
841 struct mtd_info *mtd;
842 struct resource *r;
843 int size, err;
844
845 pdata = dev_get_platdata(&pdev->dev);
846 /* No need to check pdata. the platform data is optional */
847
848 size = sizeof(struct mtd_info) + sizeof(struct onenand_chip);
849 mtd = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
850 if (!mtd)
851 return -ENOMEM;
852
853 onenand = devm_kzalloc(&pdev->dev, sizeof(struct s3c_onenand),
854 GFP_KERNEL);
855 if (!onenand)
856 return -ENOMEM;
857
858 this = (struct onenand_chip *) &mtd[1];
859 mtd->priv = this;
860 mtd->dev.parent = &pdev->dev;
861 onenand->pdev = pdev;
862 onenand->type = platform_get_device_id(pdev)->driver_data;
863
864 s3c_onenand_setup(mtd);
865
866 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
867 onenand->base = devm_ioremap_resource(&pdev->dev, r);
868 if (IS_ERR(onenand->base))
869 return PTR_ERR(onenand->base);
870
871 onenand->phys_base = r->start;
872
873 /* Set onenand_chip also */
874 this->base = onenand->base;
875
876 /* Use runtime badblock check */
877 this->options |= ONENAND_SKIP_UNLOCK_CHECK;
878
879 if (onenand->type != TYPE_S5PC110) {
880 r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
881 onenand->ahb_addr = devm_ioremap_resource(&pdev->dev, r);
882 if (IS_ERR(onenand->ahb_addr))
883 return PTR_ERR(onenand->ahb_addr);
884
885 /* Allocate 4KiB BufferRAM */
886 onenand->page_buf = devm_kzalloc(&pdev->dev, SZ_4K,
887 GFP_KERNEL);
888 if (!onenand->page_buf)
889 return -ENOMEM;
890
891 /* Allocate 128 SpareRAM */
892 onenand->oob_buf = devm_kzalloc(&pdev->dev, 128, GFP_KERNEL);
893 if (!onenand->oob_buf)
894 return -ENOMEM;
895
896 /* S3C doesn't handle subpage write */
897 mtd->subpage_sft = 0;
898 this->subpagesize = mtd->writesize;
899
900 } else { /* S5PC110 */
901 r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
902 onenand->dma_addr = devm_ioremap_resource(&pdev->dev, r);
903 if (IS_ERR(onenand->dma_addr))
904 return PTR_ERR(onenand->dma_addr);
905
906 s5pc110_dma_ops = s5pc110_dma_poll;
907 /* Interrupt support */
908 r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
909 if (r) {
910 init_completion(&onenand->complete);
911 s5pc110_dma_ops = s5pc110_dma_irq;
912 err = devm_request_irq(&pdev->dev, r->start,
913 s5pc110_onenand_irq,
914 IRQF_SHARED, "onenand",
915 &onenand);
916 if (err) {
917 dev_err(&pdev->dev, "failed to get irq\n");
918 return err;
919 }
920 }
921 }
922
923 err = onenand_scan(mtd, 1);
924 if (err)
925 return err;
926
927 if (onenand->type != TYPE_S5PC110) {
928 /* S3C doesn't handle subpage write */
929 mtd->subpage_sft = 0;
930 this->subpagesize = mtd->writesize;
931 }
932
933 if (s3c_read_reg(MEM_CFG_OFFSET) & ONENAND_SYS_CFG1_SYNC_READ)
934 dev_info(&onenand->pdev->dev, "OneNAND Sync. Burst Read enabled\n");
935
936 err = mtd_device_parse_register(mtd, NULL, NULL,
937 pdata ? pdata->parts : NULL,
938 pdata ? pdata->nr_parts : 0);
939 if (err) {
940 dev_err(&pdev->dev, "failed to parse partitions and register the MTD device\n");
941 onenand_release(mtd);
942 return err;
943 }
944
945 platform_set_drvdata(pdev, mtd);
946
947 return 0;
948 }
949
950 static int s3c_onenand_remove(struct platform_device *pdev)
951 {
952 struct mtd_info *mtd = platform_get_drvdata(pdev);
953
954 onenand_release(mtd);
955
956 return 0;
957 }
958
959 static int s3c_pm_ops_suspend(struct device *dev)
960 {
961 struct platform_device *pdev = to_platform_device(dev);
962 struct mtd_info *mtd = platform_get_drvdata(pdev);
963 struct onenand_chip *this = mtd->priv;
964
965 this->wait(mtd, FL_PM_SUSPENDED);
966 return 0;
967 }
968
969 static int s3c_pm_ops_resume(struct device *dev)
970 {
971 struct platform_device *pdev = to_platform_device(dev);
972 struct mtd_info *mtd = platform_get_drvdata(pdev);
973 struct onenand_chip *this = mtd->priv;
974
975 this->unlock_all(mtd);
976 return 0;
977 }
978
979 static const struct dev_pm_ops s3c_pm_ops = {
980 .suspend = s3c_pm_ops_suspend,
981 .resume = s3c_pm_ops_resume,
982 };
983
984 static const struct platform_device_id s3c_onenand_driver_ids[] = {
985 {
986 .name = "s3c6400-onenand",
987 .driver_data = TYPE_S3C6400,
988 }, {
989 .name = "s3c6410-onenand",
990 .driver_data = TYPE_S3C6410,
991 }, {
992 .name = "s5pc110-onenand",
993 .driver_data = TYPE_S5PC110,
994 }, { },
995 };
996 MODULE_DEVICE_TABLE(platform, s3c_onenand_driver_ids);
997
998 static struct platform_driver s3c_onenand_driver = {
999 .driver = {
1000 .name = "samsung-onenand",
1001 .pm = &s3c_pm_ops,
1002 },
1003 .id_table = s3c_onenand_driver_ids,
1004 .probe = s3c_onenand_probe,
1005 .remove = s3c_onenand_remove,
1006 };
1007
1008 module_platform_driver(s3c_onenand_driver);
1009
1010 MODULE_LICENSE("GPL");
1011 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
1012 MODULE_DESCRIPTION("Samsung OneNAND controller support");
Linux with added FPC-III support