2 * Samsung S3C64XX/S5PC1XX OneNAND driver
4 * Copyright © 2008-2010 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 * Marek Szyprowski <m.szyprowski@samsung.com>
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.
13 * S3C64XX: emulate the pseudo BufferRAM
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>
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
58 #define S3C64XX_CMD_MAP_SHIFT 24
60 #define S3C6400_FBA_SHIFT 10
61 #define S3C6400_FPA_SHIFT 4
62 #define S3C6400_FSA_SHIFT 2
64 #define S3C6410_FBA_SHIFT 12
65 #define S3C6410_FPA_SHIFT 6
66 #define S3C6410_FSA_SHIFT 4
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
86 #define S5PC110_INTC_DMA_TD (1 << 24)
87 #define S5PC110_INTC_DMA_TE (1 << 16)
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)
94 #define S5PC110_DMA_CFG_INC (0x0 << 8)
95 #define S5PC110_DMA_CFG_CNT (0x1 << 8)
97 #define S5PC110_DMA_CFG_8BIT (0x0 << 0)
98 #define S5PC110_DMA_CFG_16BIT (0x1 << 0)
99 #define S5PC110_DMA_CFG_32BIT (0x2 << 0)
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)
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)
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)
122 #define S5PC110_DMA_DIR_READ 0x0
123 #define S5PC110_DMA_DIR_WRITE 0x1
126 struct mtd_info *mtd;
127 struct platform_device *pdev;
130 void __iomem *ahb_addr;
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;
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)))
146 static struct s3c_onenand *onenand;
148 static inline int s3c_read_reg(int offset)
150 return readl(onenand->base + offset);
153 static inline void s3c_write_reg(int value, int offset)
155 writel(value, onenand->base + offset);
158 static inline int s3c_read_cmd(unsigned int cmd)
160 return readl(onenand->ahb_addr + cmd);
163 static inline void s3c_write_cmd(int value, unsigned int cmd)
165 writel(value, onenand->ahb_addr + cmd);
169 static void s3c_dump_reg(void)
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));
182 static unsigned int s3c64xx_cmd_map(unsigned type, unsigned val)
184 return (type << S3C64XX_CMD_MAP_SHIFT) | val;
187 static unsigned int s3c6400_mem_addr(int fba, int fpa, int fsa)
189 return (fba << S3C6400_FBA_SHIFT) | (fpa << S3C6400_FPA_SHIFT) |
190 (fsa << S3C6400_FSA_SHIFT);
193 static unsigned int s3c6410_mem_addr(int fba, int fpa, int fsa)
195 return (fba << S3C6410_FBA_SHIFT) | (fpa << S3C6410_FPA_SHIFT) |
196 (fsa << S3C6410_FSA_SHIFT);
199 static void s3c_onenand_reset(void)
201 unsigned long timeout = 0x10000;
204 s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET);
205 while (1 && timeout--) {
206 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
210 stat = s3c_read_reg(INT_ERR_STAT_OFFSET);
211 s3c_write_reg(stat, INT_ERR_ACK_OFFSET);
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);
219 static unsigned short s3c_onenand_readw(void __iomem *addr)
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;
227 /* It's used for probing time */
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);
242 /* Used at unlock all status */
243 case ONENAND_REG_CTRL_STATUS:
246 case ONENAND_REG_WP_STATUS:
247 return ONENAND_WP_US;
253 /* BootRAM access control */
254 if ((unsigned int) addr < ONENAND_DATARAM && onenand->bootram_command) {
256 return s3c_read_reg(MANUFACT_ID_OFFSET);
258 return s3c_read_reg(DEVICE_ID_OFFSET);
260 return s3c_read_reg(FLASH_VER_ID_OFFSET);
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__,
269 static void s3c_onenand_writew(unsigned short value, void __iomem *addr)
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;
276 /* It's used for probing time */
278 case ONENAND_REG_SYS_CFG1:
279 s3c_write_reg(value, MEM_CFG_OFFSET);
282 case ONENAND_REG_START_ADDRESS1:
283 case ONENAND_REG_START_ADDRESS2:
286 /* Lock/lock-tight/unlock/unlock_all */
287 case ONENAND_REG_START_BLOCK_ADDRESS:
294 /* BootRAM access control */
295 if ((unsigned int)addr < ONENAND_DATARAM) {
296 if (value == ONENAND_CMD_READID) {
297 onenand->bootram_command = 1;
300 if (value == ONENAND_CMD_RESET) {
301 s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET);
302 onenand->bootram_command = 0;
307 dev_info(dev, "%s: Illegal access at reg 0x%x, value 0x%x\n", __func__,
310 s3c_write_cmd(value, CMD_MAP_11(onenand, word_addr));
313 static int s3c_onenand_wait(struct mtd_info *mtd, int state)
315 struct device *dev = &onenand->pdev->dev;
316 unsigned int flags = INT_ACT;
317 unsigned int stat, ecc;
318 unsigned long timeout;
322 flags |= BLK_RW_CMP | LOAD_CMP;
325 flags |= BLK_RW_CMP | PGM_CMP;
328 flags |= BLK_RW_CMP | ERS_CMP;
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);
344 if (state != FL_READING)
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);
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
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__,
361 mtd->ecc_stats.failed++;
366 if (stat & (LOCKED_BLK | ERS_FAIL | PGM_FAIL | LD_FAIL_ECC_ERR)) {
367 dev_info(dev, "%s: controller error = 0x%04x\n", __func__,
369 if (stat & LOCKED_BLK)
370 dev_info(dev, "%s: it's locked error = 0x%04x\n",
379 static int s3c_onenand_command(struct mtd_info *mtd, int cmd, loff_t addr,
382 struct onenand_chip *this = mtd->priv;
384 int fba, fpa, fsa = 0;
385 unsigned int mem_addr, cmd_map_01, cmd_map_10;
386 int i, mcount, scount;
389 fba = (int) (addr >> this->erase_shift);
390 fpa = (int) (addr >> this->page_shift);
391 fpa &= this->page_mask;
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);
398 case ONENAND_CMD_READ:
399 case ONENAND_CMD_READOOB:
400 case ONENAND_CMD_BUFFERRAM:
401 ONENAND_SET_NEXT_BUFFERRAM(this);
406 index = ONENAND_CURRENT_BUFFERRAM(this);
409 * Emulate Two BufferRAMs and access with 4 bytes pointer
411 m = onenand->page_buf;
412 s = onenand->oob_buf;
415 m += (this->writesize >> 2);
416 s += (mtd->oobsize >> 2);
419 mcount = mtd->writesize >> 2;
420 scount = mtd->oobsize >> 2;
423 case ONENAND_CMD_READ:
425 for (i = 0; i < mcount; i++)
426 *m++ = s3c_read_cmd(cmd_map_01);
429 case ONENAND_CMD_READOOB:
430 s3c_write_reg(TSRF, TRANS_SPARE_OFFSET);
432 for (i = 0; i < mcount; i++)
433 *m++ = s3c_read_cmd(cmd_map_01);
436 for (i = 0; i < scount; i++)
437 *s++ = s3c_read_cmd(cmd_map_01);
439 s3c_write_reg(0, TRANS_SPARE_OFFSET);
442 case ONENAND_CMD_PROG:
444 for (i = 0; i < mcount; i++)
445 s3c_write_cmd(*m++, cmd_map_01);
448 case ONENAND_CMD_PROGOOB:
449 s3c_write_reg(TSRF, TRANS_SPARE_OFFSET);
451 /* Main - dummy write */
452 for (i = 0; i < mcount; i++)
453 s3c_write_cmd(0xffffffff, cmd_map_01);
456 for (i = 0; i < scount; i++)
457 s3c_write_cmd(*s++, cmd_map_01);
459 s3c_write_reg(0, TRANS_SPARE_OFFSET);
462 case ONENAND_CMD_UNLOCK_ALL:
463 s3c_write_cmd(ONENAND_UNLOCK_ALL, cmd_map_10);
466 case ONENAND_CMD_ERASE:
467 s3c_write_cmd(ONENAND_ERASE_START, cmd_map_10);
477 static unsigned char *s3c_get_bufferram(struct mtd_info *mtd, int area)
479 struct onenand_chip *this = mtd->priv;
480 int index = ONENAND_CURRENT_BUFFERRAM(this);
483 if (area == ONENAND_DATARAM) {
484 p = onenand->page_buf;
486 p += this->writesize;
488 p = onenand->oob_buf;
496 static int onenand_read_bufferram(struct mtd_info *mtd, int area,
497 unsigned char *buffer, int offset,
502 p = s3c_get_bufferram(mtd, area);
503 memcpy(buffer, p + offset, count);
507 static int onenand_write_bufferram(struct mtd_info *mtd, int area,
508 const unsigned char *buffer, int offset,
513 p = s3c_get_bufferram(mtd, area);
514 memcpy(p + offset, buffer, count);
518 static int (*s5pc110_dma_ops)(dma_addr_t dst, dma_addr_t src, size_t count, int direction);
520 static int s5pc110_dma_poll(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
522 void __iomem *base = onenand->dma_addr;
524 unsigned long timeout;
526 writel(src, base + S5PC110_DMA_SRC_ADDR);
527 writel(dst, base + S5PC110_DMA_DST_ADDR);
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);
533 writel(S5PC110_DMA_SRC_CFG_WRITE, base + S5PC110_DMA_SRC_CFG);
534 writel(S5PC110_DMA_DST_CFG_WRITE, base + S5PC110_DMA_DST_CFG);
537 writel(count, base + S5PC110_DMA_TRANS_SIZE);
538 writel(direction, base + S5PC110_DMA_TRANS_DIR);
540 writel(S5PC110_DMA_TRANS_CMD_TR, base + S5PC110_DMA_TRANS_CMD);
543 * There's no exact timeout values at Spec.
544 * In real case it takes under 1 msec.
545 * So 20 msecs are enough.
547 timeout = jiffies + msecs_to_jiffies(20);
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);
556 } while (!(status & S5PC110_DMA_TRANS_STATUS_TD) &&
557 time_before(jiffies, timeout));
559 writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD);
564 static irqreturn_t s5pc110_onenand_irq(int irq, void *data)
566 void __iomem *base = onenand->dma_addr;
569 status = readl(base + S5PC110_INTC_DMA_STATUS);
571 if (likely(status & S5PC110_INTC_DMA_TD))
572 cmd = S5PC110_DMA_TRANS_CMD_TDC;
574 if (unlikely(status & S5PC110_INTC_DMA_TE))
575 cmd = S5PC110_DMA_TRANS_CMD_TEC;
577 writel(cmd, base + S5PC110_DMA_TRANS_CMD);
578 writel(status, base + S5PC110_INTC_DMA_CLR);
580 if (!onenand->complete.done)
581 complete(&onenand->complete);
586 static int s5pc110_dma_irq(dma_addr_t dst, dma_addr_t src, size_t count, int direction)
588 void __iomem *base = onenand->dma_addr;
591 status = readl(base + S5PC110_INTC_DMA_MASK);
593 status &= ~(S5PC110_INTC_DMA_TD | S5PC110_INTC_DMA_TE);
594 writel(status, base + S5PC110_INTC_DMA_MASK);
597 writel(src, base + S5PC110_DMA_SRC_ADDR);
598 writel(dst, base + S5PC110_DMA_DST_ADDR);
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);
604 writel(S5PC110_DMA_SRC_CFG_WRITE, base + S5PC110_DMA_SRC_CFG);
605 writel(S5PC110_DMA_DST_CFG_WRITE, base + S5PC110_DMA_DST_CFG);
608 writel(count, base + S5PC110_DMA_TRANS_SIZE);
609 writel(direction, base + S5PC110_DMA_TRANS_DIR);
611 writel(S5PC110_DMA_TRANS_CMD_TR, base + S5PC110_DMA_TRANS_CMD);
613 wait_for_completion_timeout(&onenand->complete, msecs_to_jiffies(20));
618 static int s5pc110_read_bufferram(struct mtd_info *mtd, int area,
619 unsigned char *buffer, int offset, size_t count)
621 struct onenand_chip *this = mtd->priv;
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;
628 p = this->base + area;
629 if (ONENAND_CURRENT_BUFFERRAM(this)) {
630 if (area == ONENAND_DATARAM)
631 p += this->writesize;
636 if (offset & 3 || (size_t) buf & 3 ||
637 !onenand->dma_addr || count != mtd->writesize)
640 /* Handle vmalloc address */
641 if (buf >= high_memory) {
644 if (((size_t) buf & PAGE_MASK) !=
645 ((size_t) (buf + count - 1) & PAGE_MASK))
647 page = vmalloc_to_page(buf);
652 ofs = ((size_t) buf & ~PAGE_MASK);
656 dma_src = onenand->phys_base + (p - this->base);
657 dma_dst = dma_map_page(dev, page, ofs, count, DMA_FROM_DEVICE);
660 dma_src = onenand->phys_base + (p - this->base);
661 dma_dst = dma_map_single(dev, buf, count, DMA_FROM_DEVICE);
663 if (dma_mapping_error(dev, dma_dst)) {
664 dev_err(dev, "Couldn't map a %d byte buffer for DMA\n", count);
667 err = s5pc110_dma_ops(dma_dst, dma_src,
668 count, S5PC110_DMA_DIR_READ);
671 dma_unmap_page(dev, dma_dst, count, DMA_FROM_DEVICE);
673 dma_unmap_single(dev, dma_dst, count, DMA_FROM_DEVICE);
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;
685 memcpy(buffer, p, count);
690 static int s5pc110_chip_probe(struct mtd_info *mtd)
692 /* Now just return 0 */
696 static int s3c_onenand_bbt_wait(struct mtd_info *mtd, int state)
698 unsigned int flags = INT_ACT | LOAD_CMP;
700 unsigned long timeout;
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);
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);
713 if (stat & LD_FAIL_ECC_ERR) {
715 return ONENAND_BBT_READ_ERROR;
718 if (stat & LOAD_CMP) {
719 int ecc = s3c_read_reg(ECC_ERR_STAT_OFFSET);
720 if (ecc & ONENAND_ECC_4BIT_UNCORRECTABLE) {
722 return ONENAND_BBT_READ_ERROR;
729 static void s3c_onenand_check_lock_status(struct mtd_info *mtd)
731 struct onenand_chip *this = mtd->priv;
732 struct device *dev = &onenand->pdev->dev;
733 unsigned int block, end;
736 end = this->chipsize >> this->erase_shift;
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));
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);
749 static void s3c_onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs,
752 struct onenand_chip *this = mtd->priv;
753 int start, end, start_mem_addr, end_mem_addr;
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);
760 if (cmd == ONENAND_CMD_LOCK) {
761 s3c_write_cmd(ONENAND_LOCK_START, CMD_MAP_10(onenand,
763 s3c_write_cmd(ONENAND_LOCK_END, CMD_MAP_10(onenand,
766 s3c_write_cmd(ONENAND_UNLOCK_START, CMD_MAP_10(onenand,
768 s3c_write_cmd(ONENAND_UNLOCK_END, CMD_MAP_10(onenand,
772 this->wait(mtd, FL_LOCKING);
775 static void s3c_unlock_all(struct mtd_info *mtd)
777 struct onenand_chip *this = mtd->priv;
779 size_t len = this->chipsize;
781 if (this->options & ONENAND_HAS_UNLOCK_ALL) {
782 /* Write unlock command */
783 this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0);
785 /* No need to check return value */
786 this->wait(mtd, FL_LOCKING);
788 /* Workaround for all block unlock in DDP */
789 if (!ONENAND_IS_DDP(this)) {
790 s3c_onenand_check_lock_status(mtd);
794 /* All blocks on another chip */
795 ofs = this->chipsize >> 1;
796 len = this->chipsize >> 1;
799 s3c_onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK);
801 s3c_onenand_check_lock_status(mtd);
804 static void s3c_onenand_setup(struct mtd_info *mtd)
806 struct onenand_chip *this = mtd->priv;
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;
825 this->read_word = s3c_onenand_readw;
826 this->write_word = s3c_onenand_writew;
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;
833 this->read_bufferram = onenand_read_bufferram;
834 this->write_bufferram = onenand_write_bufferram;
837 static int s3c_onenand_probe(struct platform_device *pdev)
839 struct onenand_platform_data *pdata;
840 struct onenand_chip *this;
841 struct mtd_info *mtd;
845 pdata = dev_get_platdata(&pdev->dev);
846 /* No need to check pdata. the platform data is optional */
848 size = sizeof(struct mtd_info) + sizeof(struct onenand_chip);
849 mtd = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
853 onenand = devm_kzalloc(&pdev->dev, sizeof(struct s3c_onenand),
858 this = (struct onenand_chip *) &mtd[1];
860 mtd->dev.parent = &pdev->dev;
861 onenand->pdev = pdev;
862 onenand->type = platform_get_device_id(pdev)->driver_data;
864 s3c_onenand_setup(mtd);
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);
871 onenand->phys_base = r->start;
873 /* Set onenand_chip also */
874 this->base = onenand->base;
876 /* Use runtime badblock check */
877 this->options |= ONENAND_SKIP_UNLOCK_CHECK;
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);
885 /* Allocate 4KiB BufferRAM */
886 onenand->page_buf = devm_kzalloc(&pdev->dev, SZ_4K,
888 if (!onenand->page_buf)
891 /* Allocate 128 SpareRAM */
892 onenand->oob_buf = devm_kzalloc(&pdev->dev, 128, GFP_KERNEL);
893 if (!onenand->oob_buf)
896 /* S3C doesn't handle subpage write */
897 mtd->subpage_sft = 0;
898 this->subpagesize = mtd->writesize;
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);
906 s5pc110_dma_ops = s5pc110_dma_poll;
907 /* Interrupt support */
908 r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
910 init_completion(&onenand->complete);
911 s5pc110_dma_ops = s5pc110_dma_irq;
912 err = devm_request_irq(&pdev->dev, r->start,
914 IRQF_SHARED, "onenand",
917 dev_err(&pdev->dev, "failed to get irq\n");
923 err = onenand_scan(mtd, 1);
927 if (onenand->type != TYPE_S5PC110) {
928 /* S3C doesn't handle subpage write */
929 mtd->subpage_sft = 0;
930 this->subpagesize = mtd->writesize;
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");
936 err = mtd_device_register(mtd, pdata ? pdata->parts : NULL,
937 pdata ? pdata->nr_parts : 0);
939 dev_err(&pdev->dev, "failed to parse partitions and register the MTD device\n");
940 onenand_release(mtd);
944 platform_set_drvdata(pdev, mtd);
949 static int s3c_onenand_remove(struct platform_device *pdev)
951 struct mtd_info *mtd = platform_get_drvdata(pdev);
953 onenand_release(mtd);
958 static int s3c_pm_ops_suspend(struct device *dev)
960 struct mtd_info *mtd = dev_get_drvdata(dev);
961 struct onenand_chip *this = mtd->priv;
963 this->wait(mtd, FL_PM_SUSPENDED);
967 static int s3c_pm_ops_resume(struct device *dev)
969 struct mtd_info *mtd = dev_get_drvdata(dev);
970 struct onenand_chip *this = mtd->priv;
972 this->unlock_all(mtd);
976 static const struct dev_pm_ops s3c_pm_ops = {
977 .suspend = s3c_pm_ops_suspend,
978 .resume = s3c_pm_ops_resume,
981 static const struct platform_device_id s3c_onenand_driver_ids[] = {
983 .name = "s3c6400-onenand",
984 .driver_data = TYPE_S3C6400,
986 .name = "s3c6410-onenand",
987 .driver_data = TYPE_S3C6410,
989 .name = "s5pc110-onenand",
990 .driver_data = TYPE_S5PC110,
993 MODULE_DEVICE_TABLE(platform, s3c_onenand_driver_ids);
995 static struct platform_driver s3c_onenand_driver = {
997 .name = "samsung-onenand",
1000 .id_table = s3c_onenand_driver_ids,
1001 .probe = s3c_onenand_probe,
1002 .remove = s3c_onenand_remove,
1005 module_platform_driver(s3c_onenand_driver);
1007 MODULE_LICENSE("GPL");
1008 MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
1009 MODULE_DESCRIPTION("Samsung OneNAND controller support");