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739259513055567114aa26649f74ef6b7d7a58c9
[deliverable/linux.git] / drivers / mtd / onenand / samsung.c
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 <asm/mach/flash.h>
29
30 #include "samsung.h"
31
32 enum soc_type {
33 TYPE_S3C6400,
34 TYPE_S3C6410,
35 TYPE_S5PC110,
36 };
37
38 #define ONENAND_ERASE_STATUS 0x00
39 #define ONENAND_MULTI_ERASE_SET 0x01
40 #define ONENAND_ERASE_START 0x03
41 #define ONENAND_UNLOCK_START 0x08
42 #define ONENAND_UNLOCK_END 0x09
43 #define ONENAND_LOCK_START 0x0A
44 #define ONENAND_LOCK_END 0x0B
45 #define ONENAND_LOCK_TIGHT_START 0x0C
46 #define ONENAND_LOCK_TIGHT_END 0x0D
47 #define ONENAND_UNLOCK_ALL 0x0E
48 #define ONENAND_OTP_ACCESS 0x12
49 #define ONENAND_SPARE_ACCESS_ONLY 0x13
50 #define ONENAND_MAIN_ACCESS_ONLY 0x14
51 #define ONENAND_ERASE_VERIFY 0x15
52 #define ONENAND_MAIN_SPARE_ACCESS 0x16
53 #define ONENAND_PIPELINE_READ 0x4000
54
55 #define MAP_00 (0x0)
56 #define MAP_01 (0x1)
57 #define MAP_10 (0x2)
58 #define MAP_11 (0x3)
59
60 #define S3C64XX_CMD_MAP_SHIFT 24
61
62 #define S3C6400_FBA_SHIFT 10
63 #define S3C6400_FPA_SHIFT 4
64 #define S3C6400_FSA_SHIFT 2
65
66 #define S3C6410_FBA_SHIFT 12
67 #define S3C6410_FPA_SHIFT 6
68 #define S3C6410_FSA_SHIFT 4
69
70 /* S5PC110 specific definitions */
71 #define S5PC110_DMA_SRC_ADDR 0x400
72 #define S5PC110_DMA_SRC_CFG 0x404
73 #define S5PC110_DMA_DST_ADDR 0x408
74 #define S5PC110_DMA_DST_CFG 0x40C
75 #define S5PC110_DMA_TRANS_SIZE 0x414
76 #define S5PC110_DMA_TRANS_CMD 0x418
77 #define S5PC110_DMA_TRANS_STATUS 0x41C
78 #define S5PC110_DMA_TRANS_DIR 0x420
79 #define S5PC110_INTC_DMA_CLR 0x1004
80 #define S5PC110_INTC_ONENAND_CLR 0x1008
81 #define S5PC110_INTC_DMA_MASK 0x1024
82 #define S5PC110_INTC_ONENAND_MASK 0x1028
83 #define S5PC110_INTC_DMA_PEND 0x1044
84 #define S5PC110_INTC_ONENAND_PEND 0x1048
85 #define S5PC110_INTC_DMA_STATUS 0x1064
86 #define S5PC110_INTC_ONENAND_STATUS 0x1068
87
88 #define S5PC110_INTC_DMA_TD (1 << 24)
89 #define S5PC110_INTC_DMA_TE (1 << 16)
90
91 #define S5PC110_DMA_CFG_SINGLE (0x0 << 16)
92 #define S5PC110_DMA_CFG_4BURST (0x2 << 16)
93 #define S5PC110_DMA_CFG_8BURST (0x3 << 16)
94 #define S5PC110_DMA_CFG_16BURST (0x4 << 16)
95
96 #define S5PC110_DMA_CFG_INC (0x0 << 8)
97 #define S5PC110_DMA_CFG_CNT (0x1 << 8)
98
99 #define S5PC110_DMA_CFG_8BIT (0x0 << 0)
100 #define S5PC110_DMA_CFG_16BIT (0x1 << 0)
101 #define S5PC110_DMA_CFG_32BIT (0x2 << 0)
102
103 #define S5PC110_DMA_SRC_CFG_READ (S5PC110_DMA_CFG_16BURST | \
104 S5PC110_DMA_CFG_INC | \
105 S5PC110_DMA_CFG_16BIT)
106 #define S5PC110_DMA_DST_CFG_READ (S5PC110_DMA_CFG_16BURST | \
107 S5PC110_DMA_CFG_INC | \
108 S5PC110_DMA_CFG_32BIT)
109 #define S5PC110_DMA_SRC_CFG_WRITE (S5PC110_DMA_CFG_16BURST | \
110 S5PC110_DMA_CFG_INC | \
111 S5PC110_DMA_CFG_32BIT)
112 #define S5PC110_DMA_DST_CFG_WRITE (S5PC110_DMA_CFG_16BURST | \
113 S5PC110_DMA_CFG_INC | \
114 S5PC110_DMA_CFG_16BIT)
115
116 #define S5PC110_DMA_TRANS_CMD_TDC (0x1 << 18)
117 #define S5PC110_DMA_TRANS_CMD_TEC (0x1 << 16)
118 #define S5PC110_DMA_TRANS_CMD_TR (0x1 << 0)
119
120 #define S5PC110_DMA_TRANS_STATUS_TD (0x1 << 18)
121 #define S5PC110_DMA_TRANS_STATUS_TB (0x1 << 17)
122 #define S5PC110_DMA_TRANS_STATUS_TE (0x1 << 16)
123
124 #define S5PC110_DMA_DIR_READ 0x0
125 #define S5PC110_DMA_DIR_WRITE 0x1
126
127 struct s3c_onenand {
128 struct mtd_info *mtd;
129 struct platform_device *pdev;
130 enum soc_type type;
131 void __iomem *base;
132 struct resource *base_res;
133 void __iomem *ahb_addr;
134 struct resource *ahb_res;
135 int bootram_command;
136 void __iomem *page_buf;
137 void __iomem *oob_buf;
138 unsigned int (*mem_addr)(int fba, int fpa, int fsa);
139 unsigned int (*cmd_map)(unsigned int type, unsigned int val);
140 void __iomem *dma_addr;
141 struct resource *dma_res;
142 unsigned long phys_base;
143 struct completion complete;
144 };
145
146 #define CMD_MAP_00(dev, addr) (dev->cmd_map(MAP_00, ((addr) << 1)))
147 #define CMD_MAP_01(dev, mem_addr) (dev->cmd_map(MAP_01, (mem_addr)))
148 #define CMD_MAP_10(dev, mem_addr) (dev->cmd_map(MAP_10, (mem_addr)))
149 #define CMD_MAP_11(dev, addr) (dev->cmd_map(MAP_11, ((addr) << 2)))
150
151 static struct s3c_onenand *onenand;
152
153 static inline int s3c_read_reg(int offset)
154 {
155 return readl(onenand->base + offset);
156 }
157
158 static inline void s3c_write_reg(int value, int offset)
159 {
160 writel(value, onenand->base + offset);
161 }
162
163 static inline int s3c_read_cmd(unsigned int cmd)
164 {
165 return readl(onenand->ahb_addr + cmd);
166 }
167
168 static inline void s3c_write_cmd(int value, unsigned int cmd)
169 {
170 writel(value, onenand->ahb_addr + cmd);
171 }
172
173 #ifdef SAMSUNG_DEBUG
174 static void s3c_dump_reg(void)
175 {
176 int i;
177
178 for (i = 0; i < 0x400; i += 0x40) {
179 printk(KERN_INFO "0x%08X: 0x%08x 0x%08x 0x%08x 0x%08x\n",
180 (unsigned int) onenand->base + i,
181 s3c_read_reg(i), s3c_read_reg(i + 0x10),
182 s3c_read_reg(i + 0x20), s3c_read_reg(i + 0x30));
183 }
184 }
185 #endif
186
187 static unsigned int s3c64xx_cmd_map(unsigned type, unsigned val)
188 {
189 return (type << S3C64XX_CMD_MAP_SHIFT) | val;
190 }
191
192 static unsigned int s3c6400_mem_addr(int fba, int fpa, int fsa)
193 {
194 return (fba << S3C6400_FBA_SHIFT) | (fpa << S3C6400_FPA_SHIFT) |
195 (fsa << S3C6400_FSA_SHIFT);
196 }
197
198 static unsigned int s3c6410_mem_addr(int fba, int fpa, int fsa)
199 {
200 return (fba << S3C6410_FBA_SHIFT) | (fpa << S3C6410_FPA_SHIFT) |
201 (fsa << S3C6410_FSA_SHIFT);
202 }
203
204 static void s3c_onenand_reset(void)
205 {
206 unsigned long timeout = 0x10000;
207 int stat;
208
209 s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET);
210 while (1 && timeout--) {
211 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
212 if (stat & RST_CMP)
213 break;
214 }
215 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
216 s3c_write_reg(stat, INT_ERR_ACK_OFFSET);
217
218 /* Clear interrupt */
219 s3c_write_reg(0x0, INT_ERR_ACK_OFFSET);
220 /* Clear the ECC status */
221 s3c_write_reg(0x0, ECC_ERR_STAT_OFFSET);
222 }
223
224 static unsigned short s3c_onenand_readw(void __iomem *addr)
225 {
226 struct onenand_chip *this = onenand->mtd->priv;
227 struct device *dev = &onenand->pdev->dev;
228 int reg = addr - this->base;
229 int word_addr = reg >> 1;
230 int value;
231
232 /* It's used for probing time */
233 switch (reg) {
234 case ONENAND_REG_MANUFACTURER_ID:
235 return s3c_read_reg(MANUFACT_ID_OFFSET);
236 case ONENAND_REG_DEVICE_ID:
237 return s3c_read_reg(DEVICE_ID_OFFSET);
238 case ONENAND_REG_VERSION_ID:
239 return s3c_read_reg(FLASH_VER_ID_OFFSET);
240 case ONENAND_REG_DATA_BUFFER_SIZE:
241 return s3c_read_reg(DATA_BUF_SIZE_OFFSET);
242 case ONENAND_REG_TECHNOLOGY:
243 return s3c_read_reg(TECH_OFFSET);
244 case ONENAND_REG_SYS_CFG1:
245 return s3c_read_reg(MEM_CFG_OFFSET);
246
247 /* Used at unlock all status */
248 case ONENAND_REG_CTRL_STATUS:
249 return 0;
250
251 case ONENAND_REG_WP_STATUS:
252 return ONENAND_WP_US;
253
254 default:
255 break;
256 }
257
258 /* BootRAM access control */
259 if ((unsigned int) addr < ONENAND_DATARAM && onenand->bootram_command) {
260 if (word_addr == 0)
261 return s3c_read_reg(MANUFACT_ID_OFFSET);
262 if (word_addr == 1)
263 return s3c_read_reg(DEVICE_ID_OFFSET);
264 if (word_addr == 2)
265 return s3c_read_reg(FLASH_VER_ID_OFFSET);
266 }
267
268 value = s3c_read_cmd(CMD_MAP_11(onenand, word_addr)) & 0xffff;
269 dev_info(dev, "%s: Illegal access at reg 0x%x, value 0x%x\n", __func__,
270 word_addr, value);
271 return value;
272 }
273
274 static void s3c_onenand_writew(unsigned short value, void __iomem *addr)
275 {
276 struct onenand_chip *this = onenand->mtd->priv;
277 struct device *dev = &onenand->pdev->dev;
278 unsigned int reg = addr - this->base;
279 unsigned int word_addr = reg >> 1;
280
281 /* It's used for probing time */
282 switch (reg) {
283 case ONENAND_REG_SYS_CFG1:
284 s3c_write_reg(value, MEM_CFG_OFFSET);
285 return;
286
287 case ONENAND_REG_START_ADDRESS1:
288 case ONENAND_REG_START_ADDRESS2:
289 return;
290
291 /* Lock/lock-tight/unlock/unlock_all */
292 case ONENAND_REG_START_BLOCK_ADDRESS:
293 return;
294
295 default:
296 break;
297 }
298
299 /* BootRAM access control */
300 if ((unsigned int)addr < ONENAND_DATARAM) {
301 if (value == ONENAND_CMD_READID) {
302 onenand->bootram_command = 1;
303 return;
304 }
305 if (value == ONENAND_CMD_RESET) {
306 s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET);
307 onenand->bootram_command = 0;
308 return;
309 }
310 }
311
312 dev_info(dev, "%s: Illegal access at reg 0x%x, value 0x%x\n", __func__,
313 word_addr, value);
314
315 s3c_write_cmd(value, CMD_MAP_11(onenand, word_addr));
316 }
317
318 static int s3c_onenand_wait(struct mtd_info *mtd, int state)
319 {
320 struct device *dev = &onenand->pdev->dev;
321 unsigned int flags = INT_ACT;
322 unsigned int stat, ecc;
323 unsigned long timeout;
324
325 switch (state) {
326 case FL_READING:
327 flags |= BLK_RW_CMP | LOAD_CMP;
328 break;
329 case FL_WRITING:
330 flags |= BLK_RW_CMP | PGM_CMP;
331 break;
332 case FL_ERASING:
333 flags |= BLK_RW_CMP | ERS_CMP;
334 break;
335 case FL_LOCKING:
336 flags |= BLK_RW_CMP;
337 break;
338 default:
339 break;
340 }
341
342 /* The 20 msec is enough */
343 timeout = jiffies + msecs_to_jiffies(20);
344 while (time_before(jiffies, timeout)) {
345 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
346 if (stat & flags)
347 break;
348
349 if (state != FL_READING)
350 cond_resched();
351 }
352 /* To get correct interrupt status in timeout case */
353 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
354 s3c_write_reg(stat, INT_ERR_ACK_OFFSET);
355
356 /*
357 * In the Spec. it checks the controller status first
358 * However if you get the correct information in case of
359 * power off recovery (POR) test, it should read ECC status first
360 */
361 if (stat & LOAD_CMP) {
362 ecc = s3c_read_reg(ECC_ERR_STAT_OFFSET);
363 if (ecc & ONENAND_ECC_4BIT_UNCORRECTABLE) {
364 dev_info(dev, "%s: ECC error = 0x%04x\n", __func__,
365 ecc);
366 mtd->ecc_stats.failed++;
367 return -EBADMSG;
368 }
369 }
370
371 if (stat & (LOCKED_BLK | ERS_FAIL | PGM_FAIL | LD_FAIL_ECC_ERR)) {
372 dev_info(dev, "%s: controller error = 0x%04x\n", __func__,
373 stat);
374 if (stat & LOCKED_BLK)
375 dev_info(dev, "%s: it's locked error = 0x%04x\n",
376 __func__, stat);
377
378 return -EIO;
379 }
380
381 return 0;
382 }
383
384 static int s3c_onenand_command(struct mtd_info *mtd, int cmd, loff_t addr,
385 size_t len)
386 {
387 struct onenand_chip *this = mtd->priv;
388 unsigned int *m, *s;
389 int fba, fpa, fsa = 0;
390 unsigned int mem_addr, cmd_map_01, cmd_map_10;
391 int i, mcount, scount;
392 int index;
393
394 fba = (int) (addr >> this->erase_shift);
395 fpa = (int) (addr >> this->page_shift);
396 fpa &= this->page_mask;
397
398 mem_addr = onenand->mem_addr(fba, fpa, fsa);
399 cmd_map_01 = CMD_MAP_01(onenand, mem_addr);
400 cmd_map_10 = CMD_MAP_10(onenand, mem_addr);
401
402 switch (cmd) {
403 case ONENAND_CMD_READ:
404 case ONENAND_CMD_READOOB:
405 case ONENAND_CMD_BUFFERRAM:
406 ONENAND_SET_NEXT_BUFFERRAM(this);
407 default:
408 break;
409 }
410
411 index = ONENAND_CURRENT_BUFFERRAM(this);
412
413 /*
414 * Emulate Two BufferRAMs and access with 4 bytes pointer
415 */
416 m = (unsigned int *) onenand->page_buf;
417 s = (unsigned int *) onenand->oob_buf;
418
419 if (index) {
420 m += (this->writesize >> 2);
421 s += (mtd->oobsize >> 2);
422 }
423
424 mcount = mtd->writesize >> 2;
425 scount = mtd->oobsize >> 2;
426
427 switch (cmd) {
428 case ONENAND_CMD_READ:
429 /* Main */
430 for (i = 0; i < mcount; i++)
431 *m++ = s3c_read_cmd(cmd_map_01);
432 return 0;
433
434 case ONENAND_CMD_READOOB:
435 s3c_write_reg(TSRF, TRANS_SPARE_OFFSET);
436 /* Main */
437 for (i = 0; i < mcount; i++)
438 *m++ = s3c_read_cmd(cmd_map_01);
439
440 /* Spare */
441 for (i = 0; i < scount; i++)
442 *s++ = s3c_read_cmd(cmd_map_01);
443
444 s3c_write_reg(0, TRANS_SPARE_OFFSET);
445 return 0;
446
447 case ONENAND_CMD_PROG:
448 /* Main */
449 for (i = 0; i < mcount; i++)
450 s3c_write_cmd(*m++, cmd_map_01);
451 return 0;
452
453 case ONENAND_CMD_PROGOOB:
454 s3c_write_reg(TSRF, TRANS_SPARE_OFFSET);
455
456 /* Main - dummy write */
457 for (i = 0; i < mcount; i++)
458 s3c_write_cmd(0xffffffff, cmd_map_01);
459
460 /* Spare */
461 for (i = 0; i < scount; i++)
462 s3c_write_cmd(*s++, cmd_map_01);
463
464 s3c_write_reg(0, TRANS_SPARE_OFFSET);
465 return 0;
466
467 case ONENAND_CMD_UNLOCK_ALL:
468 s3c_write_cmd(ONENAND_UNLOCK_ALL, cmd_map_10);
469 return 0;
470
471 case ONENAND_CMD_ERASE:
472 s3c_write_cmd(ONENAND_ERASE_START, cmd_map_10);
473 return 0;
474
475 default:
476 break;
477 }
478
479 return 0;
480 }
481
482 static unsigned char *s3c_get_bufferram(struct mtd_info *mtd, int area)
483 {
484 struct onenand_chip *this = mtd->priv;
485 int index = ONENAND_CURRENT_BUFFERRAM(this);
486 unsigned char *p;
487
488 if (area == ONENAND_DATARAM) {
489 p = (unsigned char *) onenand->page_buf;
490 if (index == 1)
491 p += this->writesize;
492 } else {
493 p = (unsigned char *) onenand->oob_buf;
494 if (index == 1)
495 p += mtd->oobsize;
496 }
497
498 return p;
499 }
500
501 static int onenand_read_bufferram(struct mtd_info *mtd, int area,
502 unsigned char *buffer, int offset,
503 size_t count)
504 {
505 unsigned char *p;
506
507 p = s3c_get_bufferram(mtd, area);
508 memcpy(buffer, p + offset, count);
509 return 0;
510 }
511
512 static int onenand_write_bufferram(struct mtd_info *mtd, int area,
513 const unsigned char *buffer, int offset,
514 size_t count)
515 {
516 unsigned char *p;
517
518 p = s3c_get_bufferram(mtd, area);
519 memcpy(p + offset, buffer, count);
520 return 0;
521 }
522
523 static int (*s5pc110_dma_ops)(dma_addr_t dst, dma_addr_t src, size_t count, int direction);
524
525 static int s5pc110_dma_poll(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
526 {
527 void __iomem *base = onenand->dma_addr;
528 int status;
529 unsigned long timeout;
530
531 writel(src, base + S5PC110_DMA_SRC_ADDR);
532 writel(dst, base + S5PC110_DMA_DST_ADDR);
533
534 if (direction == S5PC110_DMA_DIR_READ) {
535 writel(S5PC110_DMA_SRC_CFG_READ, base + S5PC110_DMA_SRC_CFG);
536 writel(S5PC110_DMA_DST_CFG_READ, base + S5PC110_DMA_DST_CFG);
537 } else {
538 writel(S5PC110_DMA_SRC_CFG_WRITE, base + S5PC110_DMA_SRC_CFG);
539 writel(S5PC110_DMA_DST_CFG_WRITE, base + S5PC110_DMA_DST_CFG);
540 }
541
542 writel(count, base + S5PC110_DMA_TRANS_SIZE);
543 writel(direction, base + S5PC110_DMA_TRANS_DIR);
544
545 writel(S5PC110_DMA_TRANS_CMD_TR, base + S5PC110_DMA_TRANS_CMD);
546
547 /*
548 * There's no exact timeout values at Spec.
549 * In real case it takes under 1 msec.
550 * So 20 msecs are enough.
551 */
552 timeout = jiffies + msecs_to_jiffies(20);
553
554 do {
555 status = readl(base + S5PC110_DMA_TRANS_STATUS);
556 if (status & S5PC110_DMA_TRANS_STATUS_TE) {
557 writel(S5PC110_DMA_TRANS_CMD_TEC,
558 base + S5PC110_DMA_TRANS_CMD);
559 return -EIO;
560 }
561 } while (!(status & S5PC110_DMA_TRANS_STATUS_TD) &&
562 time_before(jiffies, timeout));
563
564 writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD);
565
566 return 0;
567 }
568
569 static irqreturn_t s5pc110_onenand_irq(int irq, void *data)
570 {
571 void __iomem *base = onenand->dma_addr;
572 int status, cmd = 0;
573
574 status = readl(base + S5PC110_INTC_DMA_STATUS);
575
576 if (likely(status & S5PC110_INTC_DMA_TD))
577 cmd = S5PC110_DMA_TRANS_CMD_TDC;
578
579 if (unlikely(status & S5PC110_INTC_DMA_TE))
580 cmd = S5PC110_DMA_TRANS_CMD_TEC;
581
582 writel(cmd, base + S5PC110_DMA_TRANS_CMD);
583 writel(status, base + S5PC110_INTC_DMA_CLR);
584
585 if (!onenand->complete.done)
586 complete(&onenand->complete);
587
588 return IRQ_HANDLED;
589 }
590
591 static int s5pc110_dma_irq(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
592 {
593 void __iomem *base = onenand->dma_addr;
594 int status;
595
596 status = readl(base + S5PC110_INTC_DMA_MASK);
597 if (status) {
598 status &= ~(S5PC110_INTC_DMA_TD | S5PC110_INTC_DMA_TE);
599 writel(status, base + S5PC110_INTC_DMA_MASK);
600 }
601
602 writel(src, base + S5PC110_DMA_SRC_ADDR);
603 writel(dst, base + S5PC110_DMA_DST_ADDR);
604
605 if (direction == S5PC110_DMA_DIR_READ) {
606 writel(S5PC110_DMA_SRC_CFG_READ, base + S5PC110_DMA_SRC_CFG);
607 writel(S5PC110_DMA_DST_CFG_READ, base + S5PC110_DMA_DST_CFG);
608 } else {
609 writel(S5PC110_DMA_SRC_CFG_WRITE, base + S5PC110_DMA_SRC_CFG);
610 writel(S5PC110_DMA_DST_CFG_WRITE, base + S5PC110_DMA_DST_CFG);
611 }
612
613 writel(count, base + S5PC110_DMA_TRANS_SIZE);
614 writel(direction, base + S5PC110_DMA_TRANS_DIR);
615
616 writel(S5PC110_DMA_TRANS_CMD_TR, base + S5PC110_DMA_TRANS_CMD);
617
618 wait_for_completion_timeout(&onenand->complete, msecs_to_jiffies(20));
619
620 return 0;
621 }
622
623 static int s5pc110_read_bufferram(struct mtd_info *mtd, int area,
624 unsigned char *buffer, int offset, size_t count)
625 {
626 struct onenand_chip *this = mtd->priv;
627 void __iomem *p;
628 void *buf = (void *) buffer;
629 dma_addr_t dma_src, dma_dst;
630 int err, ofs, page_dma = 0;
631 struct device *dev = &onenand->pdev->dev;
632
633 p = this->base + area;
634 if (ONENAND_CURRENT_BUFFERRAM(this)) {
635 if (area == ONENAND_DATARAM)
636 p += this->writesize;
637 else
638 p += mtd->oobsize;
639 }
640
641 if (offset & 3 || (size_t) buf & 3 ||
642 !onenand->dma_addr || count != mtd->writesize)
643 goto normal;
644
645 /* Handle vmalloc address */
646 if (buf >= high_memory) {
647 struct page *page;
648
649 if (((size_t) buf & PAGE_MASK) !=
650 ((size_t) (buf + count - 1) & PAGE_MASK))
651 goto normal;
652 page = vmalloc_to_page(buf);
653 if (!page)
654 goto normal;
655
656 /* Page offset */
657 ofs = ((size_t) buf & ~PAGE_MASK);
658 page_dma = 1;
659
660 /* DMA routine */
661 dma_src = onenand->phys_base + (p - this->base);
662 dma_dst = dma_map_page(dev, page, ofs, count, DMA_FROM_DEVICE);
663 } else {
664 /* DMA routine */
665 dma_src = onenand->phys_base + (p - this->base);
666 dma_dst = dma_map_single(dev, buf, count, DMA_FROM_DEVICE);
667 }
668 if (dma_mapping_error(dev, dma_dst)) {
669 dev_err(dev, "Couldn't map a %d byte buffer for DMA\n", count);
670 goto normal;
671 }
672 err = s5pc110_dma_ops(dma_dst, dma_src,
673 count, S5PC110_DMA_DIR_READ);
674
675 if (page_dma)
676 dma_unmap_page(dev, dma_dst, count, DMA_FROM_DEVICE);
677 else
678 dma_unmap_single(dev, dma_dst, count, DMA_FROM_DEVICE);
679
680 if (!err)
681 return 0;
682
683 normal:
684 if (count != mtd->writesize) {
685 /* Copy the bufferram to memory to prevent unaligned access */
686 memcpy(this->page_buf, p, mtd->writesize);
687 p = this->page_buf + offset;
688 }
689
690 memcpy(buffer, p, count);
691
692 return 0;
693 }
694
695 static int s5pc110_chip_probe(struct mtd_info *mtd)
696 {
697 /* Now just return 0 */
698 return 0;
699 }
700
701 static int s3c_onenand_bbt_wait(struct mtd_info *mtd, int state)
702 {
703 unsigned int flags = INT_ACT | LOAD_CMP;
704 unsigned int stat;
705 unsigned long timeout;
706
707 /* The 20 msec is enough */
708 timeout = jiffies + msecs_to_jiffies(20);
709 while (time_before(jiffies, timeout)) {
710 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
711 if (stat & flags)
712 break;
713 }
714 /* To get correct interrupt status in timeout case */
715 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
716 s3c_write_reg(stat, INT_ERR_ACK_OFFSET);
717
718 if (stat & LD_FAIL_ECC_ERR) {
719 s3c_onenand_reset();
720 return ONENAND_BBT_READ_ERROR;
721 }
722
723 if (stat & LOAD_CMP) {
724 int ecc = s3c_read_reg(ECC_ERR_STAT_OFFSET);
725 if (ecc & ONENAND_ECC_4BIT_UNCORRECTABLE) {
726 s3c_onenand_reset();
727 return ONENAND_BBT_READ_ERROR;
728 }
729 }
730
731 return 0;
732 }
733
734 static void s3c_onenand_check_lock_status(struct mtd_info *mtd)
735 {
736 struct onenand_chip *this = mtd->priv;
737 struct device *dev = &onenand->pdev->dev;
738 unsigned int block, end;
739 int tmp;
740
741 end = this->chipsize >> this->erase_shift;
742
743 for (block = 0; block < end; block++) {
744 unsigned int mem_addr = onenand->mem_addr(block, 0, 0);
745 tmp = s3c_read_cmd(CMD_MAP_01(onenand, mem_addr));
746
747 if (s3c_read_reg(INT_ERR_STAT_OFFSET) & LOCKED_BLK) {
748 dev_err(dev, "block %d is write-protected!\n", block);
749 s3c_write_reg(LOCKED_BLK, INT_ERR_ACK_OFFSET);
750 }
751 }
752 }
753
754 static void s3c_onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs,
755 size_t len, int cmd)
756 {
757 struct onenand_chip *this = mtd->priv;
758 int start, end, start_mem_addr, end_mem_addr;
759
760 start = ofs >> this->erase_shift;
761 start_mem_addr = onenand->mem_addr(start, 0, 0);
762 end = start + (len >> this->erase_shift) - 1;
763 end_mem_addr = onenand->mem_addr(end, 0, 0);
764
765 if (cmd == ONENAND_CMD_LOCK) {
766 s3c_write_cmd(ONENAND_LOCK_START, CMD_MAP_10(onenand,
767 start_mem_addr));
768 s3c_write_cmd(ONENAND_LOCK_END, CMD_MAP_10(onenand,
769 end_mem_addr));
770 } else {
771 s3c_write_cmd(ONENAND_UNLOCK_START, CMD_MAP_10(onenand,
772 start_mem_addr));
773 s3c_write_cmd(ONENAND_UNLOCK_END, CMD_MAP_10(onenand,
774 end_mem_addr));
775 }
776
777 this->wait(mtd, FL_LOCKING);
778 }
779
780 static void s3c_unlock_all(struct mtd_info *mtd)
781 {
782 struct onenand_chip *this = mtd->priv;
783 loff_t ofs = 0;
784 size_t len = this->chipsize;
785
786 if (this->options & ONENAND_HAS_UNLOCK_ALL) {
787 /* Write unlock command */
788 this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
789
790 /* No need to check return value */
791 this->wait(mtd, FL_LOCKING);
792
793 /* Workaround for all block unlock in DDP */
794 if (!ONENAND_IS_DDP(this)) {
795 s3c_onenand_check_lock_status(mtd);
796 return;
797 }
798
799 /* All blocks on another chip */
800 ofs = this->chipsize >> 1;
801 len = this->chipsize >> 1;
802 }
803
804 s3c_onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
805
806 s3c_onenand_check_lock_status(mtd);
807 }
808
809 static void s3c_onenand_setup(struct mtd_info *mtd)
810 {
811 struct onenand_chip *this = mtd->priv;
812
813 onenand->mtd = mtd;
814
815 if (onenand->type == TYPE_S3C6400) {
816 onenand->mem_addr = s3c6400_mem_addr;
817 onenand->cmd_map = s3c64xx_cmd_map;
818 } else if (onenand->type == TYPE_S3C6410) {
819 onenand->mem_addr = s3c6410_mem_addr;
820 onenand->cmd_map = s3c64xx_cmd_map;
821 } else if (onenand->type == TYPE_S5PC110) {
822 /* Use generic onenand functions */
823 this->read_bufferram = s5pc110_read_bufferram;
824 this->chip_probe = s5pc110_chip_probe;
825 return;
826 } else {
827 BUG();
828 }
829
830 this->read_word = s3c_onenand_readw;
831 this->write_word = s3c_onenand_writew;
832
833 this->wait = s3c_onenand_wait;
834 this->bbt_wait = s3c_onenand_bbt_wait;
835 this->unlock_all = s3c_unlock_all;
836 this->command = s3c_onenand_command;
837
838 this->read_bufferram = onenand_read_bufferram;
839 this->write_bufferram = onenand_write_bufferram;
840 }
841
842 static int s3c_onenand_probe(struct platform_device *pdev)
843 {
844 struct onenand_platform_data *pdata;
845 struct onenand_chip *this;
846 struct mtd_info *mtd;
847 struct resource *r;
848 int size, err;
849
850 pdata = dev_get_platdata(&pdev->dev);
851 /* No need to check pdata. the platform data is optional */
852
853 size = sizeof(struct mtd_info) + sizeof(struct onenand_chip);
854 mtd = kzalloc(size, GFP_KERNEL);
855 if (!mtd)
856 return -ENOMEM;
857
858 onenand = kzalloc(sizeof(struct s3c_onenand), GFP_KERNEL);
859 if (!onenand) {
860 err = -ENOMEM;
861 goto onenand_fail;
862 }
863
864 this = (struct onenand_chip *) &mtd[1];
865 mtd->priv = this;
866 mtd->dev.parent = &pdev->dev;
867 mtd->owner = THIS_MODULE;
868 onenand->pdev = pdev;
869 onenand->type = platform_get_device_id(pdev)->driver_data;
870
871 s3c_onenand_setup(mtd);
872
873 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
874 if (!r) {
875 dev_err(&pdev->dev, "no memory resource defined\n");
876 return -ENOENT;
877 goto ahb_resource_failed;
878 }
879
880 onenand->base_res = request_mem_region(r->start, resource_size(r),
881 pdev->name);
882 if (!onenand->base_res) {
883 dev_err(&pdev->dev, "failed to request memory resource\n");
884 err = -EBUSY;
885 goto resource_failed;
886 }
887
888 onenand->base = ioremap(r->start, resource_size(r));
889 if (!onenand->base) {
890 dev_err(&pdev->dev, "failed to map memory resource\n");
891 err = -EFAULT;
892 goto ioremap_failed;
893 }
894 /* Set onenand_chip also */
895 this->base = onenand->base;
896
897 /* Use runtime badblock check */
898 this->options |= ONENAND_SKIP_UNLOCK_CHECK;
899
900 if (onenand->type != TYPE_S5PC110) {
901 r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
902 if (!r) {
903 dev_err(&pdev->dev, "no buffer memory resource defined\n");
904 err = -ENOENT;
905 goto ahb_resource_failed;
906 }
907
908 onenand->ahb_res = request_mem_region(r->start, resource_size(r),
909 pdev->name);
910 if (!onenand->ahb_res) {
911 dev_err(&pdev->dev, "failed to request buffer memory resource\n");
912 err = -EBUSY;
913 goto ahb_resource_failed;
914 }
915
916 onenand->ahb_addr = ioremap(r->start, resource_size(r));
917 if (!onenand->ahb_addr) {
918 dev_err(&pdev->dev, "failed to map buffer memory resource\n");
919 err = -EINVAL;
920 goto ahb_ioremap_failed;
921 }
922
923 /* Allocate 4KiB BufferRAM */
924 onenand->page_buf = kzalloc(SZ_4K, GFP_KERNEL);
925 if (!onenand->page_buf) {
926 err = -ENOMEM;
927 goto page_buf_fail;
928 }
929
930 /* Allocate 128 SpareRAM */
931 onenand->oob_buf = kzalloc(128, GFP_KERNEL);
932 if (!onenand->oob_buf) {
933 err = -ENOMEM;
934 goto oob_buf_fail;
935 }
936
937 /* S3C doesn't handle subpage write */
938 mtd->subpage_sft = 0;
939 this->subpagesize = mtd->writesize;
940
941 } else { /* S5PC110 */
942 r = platform_get_resource(pdev, IORESOURCE_MEM, 1);
943 if (!r) {
944 dev_err(&pdev->dev, "no dma memory resource defined\n");
945 err = -ENOENT;
946 goto dma_resource_failed;
947 }
948
949 onenand->dma_res = request_mem_region(r->start, resource_size(r),
950 pdev->name);
951 if (!onenand->dma_res) {
952 dev_err(&pdev->dev, "failed to request dma memory resource\n");
953 err = -EBUSY;
954 goto dma_resource_failed;
955 }
956
957 onenand->dma_addr = ioremap(r->start, resource_size(r));
958 if (!onenand->dma_addr) {
959 dev_err(&pdev->dev, "failed to map dma memory resource\n");
960 err = -EINVAL;
961 goto dma_ioremap_failed;
962 }
963
964 onenand->phys_base = onenand->base_res->start;
965
966 s5pc110_dma_ops = s5pc110_dma_poll;
967 /* Interrupt support */
968 r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
969 if (r) {
970 init_completion(&onenand->complete);
971 s5pc110_dma_ops = s5pc110_dma_irq;
972 err = request_irq(r->start, s5pc110_onenand_irq,
973 IRQF_SHARED, "onenand", &onenand);
974 if (err) {
975 dev_err(&pdev->dev, "failed to get irq\n");
976 goto scan_failed;
977 }
978 }
979 }
980
981 if (onenand_scan(mtd, 1)) {
982 err = -EFAULT;
983 goto scan_failed;
984 }
985
986 if (onenand->type != TYPE_S5PC110) {
987 /* S3C doesn't handle subpage write */
988 mtd->subpage_sft = 0;
989 this->subpagesize = mtd->writesize;
990 }
991
992 if (s3c_read_reg(MEM_CFG_OFFSET) & ONENAND_SYS_CFG1_SYNC_READ)
993 dev_info(&onenand->pdev->dev, "OneNAND Sync. Burst Read enabled\n");
994
995 err = mtd_device_parse_register(mtd, NULL, NULL,
996 pdata ? pdata->parts : NULL,
997 pdata ? pdata->nr_parts : 0);
998
999 platform_set_drvdata(pdev, mtd);
1000
1001 return 0;
1002
1003 scan_failed:
1004 if (onenand->dma_addr)
1005 iounmap(onenand->dma_addr);
1006 dma_ioremap_failed:
1007 if (onenand->dma_res)
1008 release_mem_region(onenand->dma_res->start,
1009 resource_size(onenand->dma_res));
1010 kfree(onenand->oob_buf);
1011 oob_buf_fail:
1012 kfree(onenand->page_buf);
1013 page_buf_fail:
1014 if (onenand->ahb_addr)
1015 iounmap(onenand->ahb_addr);
1016 ahb_ioremap_failed:
1017 if (onenand->ahb_res)
1018 release_mem_region(onenand->ahb_res->start,
1019 resource_size(onenand->ahb_res));
1020 dma_resource_failed:
1021 ahb_resource_failed:
1022 iounmap(onenand->base);
1023 ioremap_failed:
1024 if (onenand->base_res)
1025 release_mem_region(onenand->base_res->start,
1026 resource_size(onenand->base_res));
1027 resource_failed:
1028 kfree(onenand);
1029 onenand_fail:
1030 kfree(mtd);
1031 return err;
1032 }
1033
1034 static int s3c_onenand_remove(struct platform_device *pdev)
1035 {
1036 struct mtd_info *mtd = platform_get_drvdata(pdev);
1037
1038 onenand_release(mtd);
1039 if (onenand->ahb_addr)
1040 iounmap(onenand->ahb_addr);
1041 if (onenand->ahb_res)
1042 release_mem_region(onenand->ahb_res->start,
1043 resource_size(onenand->ahb_res));
1044 if (onenand->dma_addr)
1045 iounmap(onenand->dma_addr);
1046 if (onenand->dma_res)
1047 release_mem_region(onenand->dma_res->start,
1048 resource_size(onenand->dma_res));
1049
1050 iounmap(onenand->base);
1051 release_mem_region(onenand->base_res->start,
1052 resource_size(onenand->base_res));
1053
1054 kfree(onenand->oob_buf);
1055 kfree(onenand->page_buf);
1056 kfree(onenand);
1057 kfree(mtd);
1058 return 0;
1059 }
1060
1061 static int s3c_pm_ops_suspend(struct device *dev)
1062 {
1063 struct platform_device *pdev = to_platform_device(dev);
1064 struct mtd_info *mtd = platform_get_drvdata(pdev);
1065 struct onenand_chip *this = mtd->priv;
1066
1067 this->wait(mtd, FL_PM_SUSPENDED);
1068 return 0;
1069 }
1070
1071 static int s3c_pm_ops_resume(struct device *dev)
1072 {
1073 struct platform_device *pdev = to_platform_device(dev);
1074 struct mtd_info *mtd = platform_get_drvdata(pdev);
1075 struct onenand_chip *this = mtd->priv;
1076
1077 this->unlock_all(mtd);
1078 return 0;
1079 }
1080
1081 static const struct dev_pm_ops s3c_pm_ops = {
1082 .suspend = s3c_pm_ops_suspend,
1083 .resume = s3c_pm_ops_resume,
1084 };
1085
1086 static const struct platform_device_id s3c_onenand_driver_ids[] = {
1087 {
1088 .name = "s3c6400-onenand",
1089 .driver_data = TYPE_S3C6400,
1090 }, {
1091 .name = "s3c6410-onenand",
1092 .driver_data = TYPE_S3C6410,
1093 }, {
1094 .name = "s5pc110-onenand",
1095 .driver_data = TYPE_S5PC110,
1096 }, { },
1097 };
1098 MODULE_DEVICE_TABLE(platform, s3c_onenand_driver_ids);
1099
1100 static struct platform_driver s3c_onenand_driver = {
1101 .driver = {
1102 .name = "samsung-onenand",
1103 .pm = &s3c_pm_ops,
1104 },
1105 .id_table = s3c_onenand_driver_ids,
1106 .probe = s3c_onenand_probe,
1107 .remove = s3c_onenand_remove,
1108 };
1109
1110 module_platform_driver(s3c_onenand_driver);
1111
1112 MODULE_LICENSE("GPL");
1113 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
1114 MODULE_DESCRIPTION("Samsung OneNAND controller support");
Linux kernel - Deliverables
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