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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 and S5PC100: 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 | ||
26 | #include <asm/mach/flash.h> | |
27 | #include <plat/regs-onenand.h> | |
28 | ||
29 | #include <linux/io.h> | |
30 | ||
31 | enum soc_type { | |
32 | TYPE_S3C6400, | |
33 | TYPE_S3C6410, | |
34 | TYPE_S5PC100, | |
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 | #define S5PC1XX_CMD_MAP_SHIFT 26 | |
62 | ||
63 | #define S3C6400_FBA_SHIFT 10 | |
64 | #define S3C6400_FPA_SHIFT 4 | |
65 | #define S3C6400_FSA_SHIFT 2 | |
66 | ||
67 | #define S3C6410_FBA_SHIFT 12 | |
68 | #define S3C6410_FPA_SHIFT 6 | |
69 | #define S3C6410_FSA_SHIFT 4 | |
70 | ||
71 | #define S5PC100_FBA_SHIFT 13 | |
72 | #define S5PC100_FPA_SHIFT 7 | |
73 | #define S5PC100_FSA_SHIFT 5 | |
74 | ||
75 | /* S5PC110 specific definitions */ | |
76 | #define S5PC110_DMA_SRC_ADDR 0x400 | |
77 | #define S5PC110_DMA_SRC_CFG 0x404 | |
78 | #define S5PC110_DMA_DST_ADDR 0x408 | |
79 | #define S5PC110_DMA_DST_CFG 0x40C | |
80 | #define S5PC110_DMA_TRANS_SIZE 0x414 | |
81 | #define S5PC110_DMA_TRANS_CMD 0x418 | |
82 | #define S5PC110_DMA_TRANS_STATUS 0x41C | |
83 | #define S5PC110_DMA_TRANS_DIR 0x420 | |
84 | ||
85 | #define S5PC110_DMA_CFG_SINGLE (0x0 << 16) | |
86 | #define S5PC110_DMA_CFG_4BURST (0x2 << 16) | |
87 | #define S5PC110_DMA_CFG_8BURST (0x3 << 16) | |
88 | #define S5PC110_DMA_CFG_16BURST (0x4 << 16) | |
89 | ||
90 | #define S5PC110_DMA_CFG_INC (0x0 << 8) | |
91 | #define S5PC110_DMA_CFG_CNT (0x1 << 8) | |
92 | ||
93 | #define S5PC110_DMA_CFG_8BIT (0x0 << 0) | |
94 | #define S5PC110_DMA_CFG_16BIT (0x1 << 0) | |
95 | #define S5PC110_DMA_CFG_32BIT (0x2 << 0) | |
96 | ||
97 | #define S5PC110_DMA_SRC_CFG_READ (S5PC110_DMA_CFG_16BURST | \ | |
98 | S5PC110_DMA_CFG_INC | \ | |
99 | S5PC110_DMA_CFG_16BIT) | |
100 | #define S5PC110_DMA_DST_CFG_READ (S5PC110_DMA_CFG_16BURST | \ | |
101 | S5PC110_DMA_CFG_INC | \ | |
102 | S5PC110_DMA_CFG_32BIT) | |
103 | #define S5PC110_DMA_SRC_CFG_WRITE (S5PC110_DMA_CFG_16BURST | \ | |
104 | S5PC110_DMA_CFG_INC | \ | |
105 | S5PC110_DMA_CFG_32BIT) | |
106 | #define S5PC110_DMA_DST_CFG_WRITE (S5PC110_DMA_CFG_16BURST | \ | |
107 | S5PC110_DMA_CFG_INC | \ | |
108 | S5PC110_DMA_CFG_16BIT) | |
109 | ||
110 | #define S5PC110_DMA_TRANS_CMD_TDC (0x1 << 18) | |
111 | #define S5PC110_DMA_TRANS_CMD_TEC (0x1 << 16) | |
112 | #define S5PC110_DMA_TRANS_CMD_TR (0x1 << 0) | |
113 | ||
114 | #define S5PC110_DMA_TRANS_STATUS_TD (0x1 << 18) | |
115 | #define S5PC110_DMA_TRANS_STATUS_TB (0x1 << 17) | |
116 | #define S5PC110_DMA_TRANS_STATUS_TE (0x1 << 16) | |
117 | ||
118 | #define S5PC110_DMA_DIR_READ 0x0 | |
119 | #define S5PC110_DMA_DIR_WRITE 0x1 | |
120 | ||
121 | struct s3c_onenand { | |
122 | struct mtd_info *mtd; | |
123 | struct platform_device *pdev; | |
124 | enum soc_type type; | |
125 | void __iomem *base; | |
126 | struct resource *base_res; | |
127 | void __iomem *ahb_addr; | |
128 | struct resource *ahb_res; | |
129 | int bootram_command; | |
130 | void __iomem *page_buf; | |
131 | void __iomem *oob_buf; | |
132 | unsigned int (*mem_addr)(int fba, int fpa, int fsa); | |
133 | unsigned int (*cmd_map)(unsigned int type, unsigned int val); | |
134 | void __iomem *dma_addr; | |
135 | struct resource *dma_res; | |
136 | unsigned long phys_base; | |
137 | #ifdef CONFIG_MTD_PARTITIONS | |
138 | struct mtd_partition *parts; | |
139 | #endif | |
140 | }; | |
141 | ||
142 | #define CMD_MAP_00(dev, addr) (dev->cmd_map(MAP_00, ((addr) << 1))) | |
143 | #define CMD_MAP_01(dev, mem_addr) (dev->cmd_map(MAP_01, (mem_addr))) | |
144 | #define CMD_MAP_10(dev, mem_addr) (dev->cmd_map(MAP_10, (mem_addr))) | |
145 | #define CMD_MAP_11(dev, addr) (dev->cmd_map(MAP_11, ((addr) << 2))) | |
146 | ||
147 | static struct s3c_onenand *onenand; | |
148 | ||
149 | #ifdef CONFIG_MTD_PARTITIONS | |
150 | static const char *part_probes[] = { "cmdlinepart", NULL, }; | |
151 | #endif | |
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 s5pc1xx_cmd_map(unsigned type, unsigned val) | |
193 | { | |
194 | return (type << S5PC1XX_CMD_MAP_SHIFT) | val; | |
195 | } | |
196 | ||
197 | static unsigned int s3c6400_mem_addr(int fba, int fpa, int fsa) | |
198 | { | |
199 | return (fba << S3C6400_FBA_SHIFT) | (fpa << S3C6400_FPA_SHIFT) | | |
200 | (fsa << S3C6400_FSA_SHIFT); | |
201 | } | |
202 | ||
203 | static unsigned int s3c6410_mem_addr(int fba, int fpa, int fsa) | |
204 | { | |
205 | return (fba << S3C6410_FBA_SHIFT) | (fpa << S3C6410_FPA_SHIFT) | | |
206 | (fsa << S3C6410_FSA_SHIFT); | |
207 | } | |
208 | ||
209 | static unsigned int s5pc100_mem_addr(int fba, int fpa, int fsa) | |
210 | { | |
211 | return (fba << S5PC100_FBA_SHIFT) | (fpa << S5PC100_FPA_SHIFT) | | |
212 | (fsa << S5PC100_FSA_SHIFT); | |
213 | } | |
214 | ||
215 | static void s3c_onenand_reset(void) | |
216 | { | |
217 | unsigned long timeout = 0x10000; | |
218 | int stat; | |
219 | ||
220 | s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET); | |
221 | while (1 && timeout--) { | |
222 | stat = s3c_read_reg(INT_ERR_STAT_OFFSET); | |
223 | if (stat & RST_CMP) | |
224 | break; | |
225 | } | |
226 | stat = s3c_read_reg(INT_ERR_STAT_OFFSET); | |
227 | s3c_write_reg(stat, INT_ERR_ACK_OFFSET); | |
228 | ||
229 | /* Clear interrupt */ | |
230 | s3c_write_reg(0x0, INT_ERR_ACK_OFFSET); | |
231 | /* Clear the ECC status */ | |
232 | s3c_write_reg(0x0, ECC_ERR_STAT_OFFSET); | |
233 | } | |
234 | ||
235 | static unsigned short s3c_onenand_readw(void __iomem *addr) | |
236 | { | |
237 | struct onenand_chip *this = onenand->mtd->priv; | |
238 | struct device *dev = &onenand->pdev->dev; | |
239 | int reg = addr - this->base; | |
240 | int word_addr = reg >> 1; | |
241 | int value; | |
242 | ||
243 | /* It's used for probing time */ | |
244 | switch (reg) { | |
245 | case ONENAND_REG_MANUFACTURER_ID: | |
246 | return s3c_read_reg(MANUFACT_ID_OFFSET); | |
247 | case ONENAND_REG_DEVICE_ID: | |
248 | return s3c_read_reg(DEVICE_ID_OFFSET); | |
249 | case ONENAND_REG_VERSION_ID: | |
250 | return s3c_read_reg(FLASH_VER_ID_OFFSET); | |
251 | case ONENAND_REG_DATA_BUFFER_SIZE: | |
252 | return s3c_read_reg(DATA_BUF_SIZE_OFFSET); | |
253 | case ONENAND_REG_TECHNOLOGY: | |
254 | return s3c_read_reg(TECH_OFFSET); | |
255 | case ONENAND_REG_SYS_CFG1: | |
256 | return s3c_read_reg(MEM_CFG_OFFSET); | |
257 | ||
258 | /* Used at unlock all status */ | |
259 | case ONENAND_REG_CTRL_STATUS: | |
260 | return 0; | |
261 | ||
262 | case ONENAND_REG_WP_STATUS: | |
263 | return ONENAND_WP_US; | |
264 | ||
265 | default: | |
266 | break; | |
267 | } | |
268 | ||
269 | /* BootRAM access control */ | |
270 | if ((unsigned int) addr < ONENAND_DATARAM && onenand->bootram_command) { | |
271 | if (word_addr == 0) | |
272 | return s3c_read_reg(MANUFACT_ID_OFFSET); | |
273 | if (word_addr == 1) | |
274 | return s3c_read_reg(DEVICE_ID_OFFSET); | |
275 | if (word_addr == 2) | |
276 | return s3c_read_reg(FLASH_VER_ID_OFFSET); | |
277 | } | |
278 | ||
279 | value = s3c_read_cmd(CMD_MAP_11(onenand, word_addr)) & 0xffff; | |
280 | dev_info(dev, "%s: Illegal access at reg 0x%x, value 0x%x\n", __func__, | |
281 | word_addr, value); | |
282 | return value; | |
283 | } | |
284 | ||
285 | static void s3c_onenand_writew(unsigned short value, void __iomem *addr) | |
286 | { | |
287 | struct onenand_chip *this = onenand->mtd->priv; | |
288 | struct device *dev = &onenand->pdev->dev; | |
289 | unsigned int reg = addr - this->base; | |
290 | unsigned int word_addr = reg >> 1; | |
291 | ||
292 | /* It's used for probing time */ | |
293 | switch (reg) { | |
294 | case ONENAND_REG_SYS_CFG1: | |
295 | s3c_write_reg(value, MEM_CFG_OFFSET); | |
296 | return; | |
297 | ||
298 | case ONENAND_REG_START_ADDRESS1: | |
299 | case ONENAND_REG_START_ADDRESS2: | |
300 | return; | |
301 | ||
302 | /* Lock/lock-tight/unlock/unlock_all */ | |
303 | case ONENAND_REG_START_BLOCK_ADDRESS: | |
304 | return; | |
305 | ||
306 | default: | |
307 | break; | |
308 | } | |
309 | ||
310 | /* BootRAM access control */ | |
311 | if ((unsigned int)addr < ONENAND_DATARAM) { | |
312 | if (value == ONENAND_CMD_READID) { | |
313 | onenand->bootram_command = 1; | |
314 | return; | |
315 | } | |
316 | if (value == ONENAND_CMD_RESET) { | |
317 | s3c_write_reg(ONENAND_MEM_RESET_COLD, MEM_RESET_OFFSET); | |
318 | onenand->bootram_command = 0; | |
319 | return; | |
320 | } | |
321 | } | |
322 | ||
323 | dev_info(dev, "%s: Illegal access at reg 0x%x, value 0x%x\n", __func__, | |
324 | word_addr, value); | |
325 | ||
326 | s3c_write_cmd(value, CMD_MAP_11(onenand, word_addr)); | |
327 | } | |
328 | ||
329 | static int s3c_onenand_wait(struct mtd_info *mtd, int state) | |
330 | { | |
331 | struct device *dev = &onenand->pdev->dev; | |
332 | unsigned int flags = INT_ACT; | |
333 | unsigned int stat, ecc; | |
334 | unsigned long timeout; | |
335 | ||
336 | switch (state) { | |
337 | case FL_READING: | |
338 | flags |= BLK_RW_CMP | LOAD_CMP; | |
339 | break; | |
340 | case FL_WRITING: | |
341 | flags |= BLK_RW_CMP | PGM_CMP; | |
342 | break; | |
343 | case FL_ERASING: | |
344 | flags |= BLK_RW_CMP | ERS_CMP; | |
345 | break; | |
346 | case FL_LOCKING: | |
347 | flags |= BLK_RW_CMP; | |
348 | break; | |
349 | default: | |
350 | break; | |
351 | } | |
352 | ||
353 | /* The 20 msec is enough */ | |
354 | timeout = jiffies + msecs_to_jiffies(20); | |
355 | while (time_before(jiffies, timeout)) { | |
356 | stat = s3c_read_reg(INT_ERR_STAT_OFFSET); | |
357 | if (stat & flags) | |
358 | break; | |
359 | ||
360 | if (state != FL_READING) | |
361 | cond_resched(); | |
362 | } | |
363 | /* To get correct interrupt status in timeout case */ | |
364 | stat = s3c_read_reg(INT_ERR_STAT_OFFSET); | |
365 | s3c_write_reg(stat, INT_ERR_ACK_OFFSET); | |
366 | ||
367 | /* | |
368 | * In the Spec. it checks the controller status first | |
369 | * However if you get the correct information in case of | |
370 | * power off recovery (POR) test, it should read ECC status first | |
371 | */ | |
372 | if (stat & LOAD_CMP) { | |
373 | ecc = s3c_read_reg(ECC_ERR_STAT_OFFSET); | |
374 | if (ecc & ONENAND_ECC_4BIT_UNCORRECTABLE) { | |
375 | dev_info(dev, "%s: ECC error = 0x%04x\n", __func__, | |
376 | ecc); | |
377 | mtd->ecc_stats.failed++; | |
378 | return -EBADMSG; | |
379 | } | |
380 | } | |
381 | ||
382 | if (stat & (LOCKED_BLK | ERS_FAIL | PGM_FAIL | LD_FAIL_ECC_ERR)) { | |
383 | dev_info(dev, "%s: controller error = 0x%04x\n", __func__, | |
384 | stat); | |
385 | if (stat & LOCKED_BLK) | |
386 | dev_info(dev, "%s: it's locked error = 0x%04x\n", | |
387 | __func__, stat); | |
388 | ||
389 | return -EIO; | |
390 | } | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | static int s3c_onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, | |
396 | size_t len) | |
397 | { | |
398 | struct onenand_chip *this = mtd->priv; | |
399 | unsigned int *m, *s; | |
400 | int fba, fpa, fsa = 0; | |
401 | unsigned int mem_addr, cmd_map_01, cmd_map_10; | |
402 | int i, mcount, scount; | |
403 | int index; | |
404 | ||
405 | fba = (int) (addr >> this->erase_shift); | |
406 | fpa = (int) (addr >> this->page_shift); | |
407 | fpa &= this->page_mask; | |
408 | ||
409 | mem_addr = onenand->mem_addr(fba, fpa, fsa); | |
410 | cmd_map_01 = CMD_MAP_01(onenand, mem_addr); | |
411 | cmd_map_10 = CMD_MAP_10(onenand, mem_addr); | |
412 | ||
413 | switch (cmd) { | |
414 | case ONENAND_CMD_READ: | |
415 | case ONENAND_CMD_READOOB: | |
416 | case ONENAND_CMD_BUFFERRAM: | |
417 | ONENAND_SET_NEXT_BUFFERRAM(this); | |
418 | default: | |
419 | break; | |
420 | } | |
421 | ||
422 | index = ONENAND_CURRENT_BUFFERRAM(this); | |
423 | ||
424 | /* | |
425 | * Emulate Two BufferRAMs and access with 4 bytes pointer | |
426 | */ | |
427 | m = (unsigned int *) onenand->page_buf; | |
428 | s = (unsigned int *) onenand->oob_buf; | |
429 | ||
430 | if (index) { | |
431 | m += (this->writesize >> 2); | |
432 | s += (mtd->oobsize >> 2); | |
433 | } | |
434 | ||
435 | mcount = mtd->writesize >> 2; | |
436 | scount = mtd->oobsize >> 2; | |
437 | ||
438 | switch (cmd) { | |
439 | case ONENAND_CMD_READ: | |
440 | /* Main */ | |
441 | for (i = 0; i < mcount; i++) | |
442 | *m++ = s3c_read_cmd(cmd_map_01); | |
443 | return 0; | |
444 | ||
445 | case ONENAND_CMD_READOOB: | |
446 | s3c_write_reg(TSRF, TRANS_SPARE_OFFSET); | |
447 | /* Main */ | |
448 | for (i = 0; i < mcount; i++) | |
449 | *m++ = s3c_read_cmd(cmd_map_01); | |
450 | ||
451 | /* Spare */ | |
452 | for (i = 0; i < scount; i++) | |
453 | *s++ = s3c_read_cmd(cmd_map_01); | |
454 | ||
455 | s3c_write_reg(0, TRANS_SPARE_OFFSET); | |
456 | return 0; | |
457 | ||
458 | case ONENAND_CMD_PROG: | |
459 | /* Main */ | |
460 | for (i = 0; i < mcount; i++) | |
461 | s3c_write_cmd(*m++, cmd_map_01); | |
462 | return 0; | |
463 | ||
464 | case ONENAND_CMD_PROGOOB: | |
465 | s3c_write_reg(TSRF, TRANS_SPARE_OFFSET); | |
466 | ||
467 | /* Main - dummy write */ | |
468 | for (i = 0; i < mcount; i++) | |
469 | s3c_write_cmd(0xffffffff, cmd_map_01); | |
470 | ||
471 | /* Spare */ | |
472 | for (i = 0; i < scount; i++) | |
473 | s3c_write_cmd(*s++, cmd_map_01); | |
474 | ||
475 | s3c_write_reg(0, TRANS_SPARE_OFFSET); | |
476 | return 0; | |
477 | ||
478 | case ONENAND_CMD_UNLOCK_ALL: | |
479 | s3c_write_cmd(ONENAND_UNLOCK_ALL, cmd_map_10); | |
480 | return 0; | |
481 | ||
482 | case ONENAND_CMD_ERASE: | |
483 | s3c_write_cmd(ONENAND_ERASE_START, cmd_map_10); | |
484 | return 0; | |
485 | ||
486 | default: | |
487 | break; | |
488 | } | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static unsigned char *s3c_get_bufferram(struct mtd_info *mtd, int area) | |
494 | { | |
495 | struct onenand_chip *this = mtd->priv; | |
496 | int index = ONENAND_CURRENT_BUFFERRAM(this); | |
497 | unsigned char *p; | |
498 | ||
499 | if (area == ONENAND_DATARAM) { | |
500 | p = (unsigned char *) onenand->page_buf; | |
501 | if (index == 1) | |
502 | p += this->writesize; | |
503 | } else { | |
504 | p = (unsigned char *) onenand->oob_buf; | |
505 | if (index == 1) | |
506 | p += mtd->oobsize; | |
507 | } | |
508 | ||
509 | return p; | |
510 | } | |
511 | ||
512 | static int onenand_read_bufferram(struct mtd_info *mtd, int area, | |
513 | unsigned char *buffer, int offset, | |
514 | size_t count) | |
515 | { | |
516 | unsigned char *p; | |
517 | ||
518 | p = s3c_get_bufferram(mtd, area); | |
519 | memcpy(buffer, p + offset, count); | |
520 | return 0; | |
521 | } | |
522 | ||
523 | static int onenand_write_bufferram(struct mtd_info *mtd, int area, | |
524 | const unsigned char *buffer, int offset, | |
525 | size_t count) | |
526 | { | |
527 | unsigned char *p; | |
528 | ||
529 | p = s3c_get_bufferram(mtd, area); | |
530 | memcpy(p + offset, buffer, count); | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static int s5pc110_dma_ops(void *dst, void *src, size_t count, int direction) | |
535 | { | |
536 | void __iomem *base = onenand->dma_addr; | |
537 | int status; | |
538 | ||
539 | writel(src, base + S5PC110_DMA_SRC_ADDR); | |
540 | writel(dst, base + S5PC110_DMA_DST_ADDR); | |
541 | ||
542 | if (direction == S5PC110_DMA_DIR_READ) { | |
543 | writel(S5PC110_DMA_SRC_CFG_READ, base + S5PC110_DMA_SRC_CFG); | |
544 | writel(S5PC110_DMA_DST_CFG_READ, base + S5PC110_DMA_DST_CFG); | |
545 | } else { | |
546 | writel(S5PC110_DMA_SRC_CFG_WRITE, base + S5PC110_DMA_SRC_CFG); | |
547 | writel(S5PC110_DMA_DST_CFG_WRITE, base + S5PC110_DMA_DST_CFG); | |
548 | } | |
549 | ||
550 | writel(count, base + S5PC110_DMA_TRANS_SIZE); | |
551 | writel(direction, base + S5PC110_DMA_TRANS_DIR); | |
552 | ||
553 | writel(S5PC110_DMA_TRANS_CMD_TR, base + S5PC110_DMA_TRANS_CMD); | |
554 | ||
555 | do { | |
556 | status = readl(base + S5PC110_DMA_TRANS_STATUS); | |
53d1e137 KP |
557 | if (status & S5PC110_DMA_TRANS_STATUS_TE) { |
558 | writel(S5PC110_DMA_TRANS_CMD_TEC, | |
559 | base + S5PC110_DMA_TRANS_CMD); | |
560 | return -EIO; | |
561 | } | |
46f3e88b KP |
562 | } while (!(status & S5PC110_DMA_TRANS_STATUS_TD)); |
563 | ||
46f3e88b KP |
564 | writel(S5PC110_DMA_TRANS_CMD_TDC, base + S5PC110_DMA_TRANS_CMD); |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | static int s5pc110_read_bufferram(struct mtd_info *mtd, int area, | |
570 | unsigned char *buffer, int offset, size_t count) | |
571 | { | |
572 | struct onenand_chip *this = mtd->priv; | |
46f3e88b KP |
573 | void __iomem *p; |
574 | void *buf = (void *) buffer; | |
575 | dma_addr_t dma_src, dma_dst; | |
576 | int err; | |
577 | ||
9aba97ad | 578 | p = this->base + area; |
46f3e88b KP |
579 | if (ONENAND_CURRENT_BUFFERRAM(this)) { |
580 | if (area == ONENAND_DATARAM) | |
581 | p += this->writesize; | |
582 | else | |
583 | p += mtd->oobsize; | |
584 | } | |
585 | ||
586 | if (offset & 3 || (size_t) buf & 3 || | |
587 | !onenand->dma_addr || count != mtd->writesize) | |
588 | goto normal; | |
589 | ||
590 | /* Handle vmalloc address */ | |
591 | if (buf >= high_memory) { | |
592 | struct page *page; | |
593 | ||
594 | if (((size_t) buf & PAGE_MASK) != | |
595 | ((size_t) (buf + count - 1) & PAGE_MASK)) | |
596 | goto normal; | |
597 | page = vmalloc_to_page(buf); | |
598 | if (!page) | |
599 | goto normal; | |
600 | buf = page_address(page) + ((size_t) buf & ~PAGE_MASK); | |
601 | } | |
602 | ||
603 | /* DMA routine */ | |
604 | dma_src = onenand->phys_base + (p - this->base); | |
605 | dma_dst = dma_map_single(&onenand->pdev->dev, | |
606 | buf, count, DMA_FROM_DEVICE); | |
607 | if (dma_mapping_error(&onenand->pdev->dev, dma_dst)) { | |
608 | dev_err(&onenand->pdev->dev, | |
609 | "Couldn't map a %d byte buffer for DMA\n", count); | |
610 | goto normal; | |
611 | } | |
612 | err = s5pc110_dma_ops((void *) dma_dst, (void *) dma_src, | |
613 | count, S5PC110_DMA_DIR_READ); | |
614 | dma_unmap_single(&onenand->pdev->dev, dma_dst, count, DMA_FROM_DEVICE); | |
615 | ||
616 | if (!err) | |
617 | return 0; | |
618 | ||
619 | normal: | |
620 | if (count != mtd->writesize) { | |
621 | /* Copy the bufferram to memory to prevent unaligned access */ | |
9aba97ad | 622 | memcpy(this->page_buf, p, mtd->writesize); |
46f3e88b KP |
623 | p = this->page_buf + offset; |
624 | } | |
625 | ||
626 | memcpy(buffer, p, count); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
7b0507eb KP |
631 | static int s5pc110_chip_probe(struct mtd_info *mtd) |
632 | { | |
633 | /* Now just return 0 */ | |
634 | return 0; | |
635 | } | |
636 | ||
46f3e88b KP |
637 | static int s3c_onenand_bbt_wait(struct mtd_info *mtd, int state) |
638 | { | |
639 | unsigned int flags = INT_ACT | LOAD_CMP; | |
640 | unsigned int stat; | |
641 | unsigned long timeout; | |
642 | ||
643 | /* The 20 msec is enough */ | |
644 | timeout = jiffies + msecs_to_jiffies(20); | |
645 | while (time_before(jiffies, timeout)) { | |
646 | stat = s3c_read_reg(INT_ERR_STAT_OFFSET); | |
647 | if (stat & flags) | |
648 | break; | |
649 | } | |
650 | /* To get correct interrupt status in timeout case */ | |
651 | stat = s3c_read_reg(INT_ERR_STAT_OFFSET); | |
652 | s3c_write_reg(stat, INT_ERR_ACK_OFFSET); | |
653 | ||
654 | if (stat & LD_FAIL_ECC_ERR) { | |
655 | s3c_onenand_reset(); | |
656 | return ONENAND_BBT_READ_ERROR; | |
657 | } | |
658 | ||
659 | if (stat & LOAD_CMP) { | |
660 | int ecc = s3c_read_reg(ECC_ERR_STAT_OFFSET); | |
661 | if (ecc & ONENAND_ECC_4BIT_UNCORRECTABLE) { | |
662 | s3c_onenand_reset(); | |
663 | return ONENAND_BBT_READ_ERROR; | |
664 | } | |
665 | } | |
666 | ||
667 | return 0; | |
668 | } | |
669 | ||
670 | static void s3c_onenand_check_lock_status(struct mtd_info *mtd) | |
671 | { | |
672 | struct onenand_chip *this = mtd->priv; | |
673 | struct device *dev = &onenand->pdev->dev; | |
674 | unsigned int block, end; | |
675 | int tmp; | |
676 | ||
677 | end = this->chipsize >> this->erase_shift; | |
678 | ||
679 | for (block = 0; block < end; block++) { | |
680 | unsigned int mem_addr = onenand->mem_addr(block, 0, 0); | |
681 | tmp = s3c_read_cmd(CMD_MAP_01(onenand, mem_addr)); | |
682 | ||
683 | if (s3c_read_reg(INT_ERR_STAT_OFFSET) & LOCKED_BLK) { | |
684 | dev_err(dev, "block %d is write-protected!\n", block); | |
685 | s3c_write_reg(LOCKED_BLK, INT_ERR_ACK_OFFSET); | |
686 | } | |
687 | } | |
688 | } | |
689 | ||
690 | static void s3c_onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, | |
691 | size_t len, int cmd) | |
692 | { | |
693 | struct onenand_chip *this = mtd->priv; | |
694 | int start, end, start_mem_addr, end_mem_addr; | |
695 | ||
696 | start = ofs >> this->erase_shift; | |
697 | start_mem_addr = onenand->mem_addr(start, 0, 0); | |
698 | end = start + (len >> this->erase_shift) - 1; | |
699 | end_mem_addr = onenand->mem_addr(end, 0, 0); | |
700 | ||
701 | if (cmd == ONENAND_CMD_LOCK) { | |
702 | s3c_write_cmd(ONENAND_LOCK_START, CMD_MAP_10(onenand, | |
703 | start_mem_addr)); | |
704 | s3c_write_cmd(ONENAND_LOCK_END, CMD_MAP_10(onenand, | |
705 | end_mem_addr)); | |
706 | } else { | |
707 | s3c_write_cmd(ONENAND_UNLOCK_START, CMD_MAP_10(onenand, | |
708 | start_mem_addr)); | |
709 | s3c_write_cmd(ONENAND_UNLOCK_END, CMD_MAP_10(onenand, | |
710 | end_mem_addr)); | |
711 | } | |
712 | ||
713 | this->wait(mtd, FL_LOCKING); | |
714 | } | |
715 | ||
716 | static void s3c_unlock_all(struct mtd_info *mtd) | |
717 | { | |
718 | struct onenand_chip *this = mtd->priv; | |
719 | loff_t ofs = 0; | |
720 | size_t len = this->chipsize; | |
721 | ||
722 | if (this->options & ONENAND_HAS_UNLOCK_ALL) { | |
723 | /* Write unlock command */ | |
724 | this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0); | |
725 | ||
726 | /* No need to check return value */ | |
727 | this->wait(mtd, FL_LOCKING); | |
728 | ||
729 | /* Workaround for all block unlock in DDP */ | |
730 | if (!ONENAND_IS_DDP(this)) { | |
731 | s3c_onenand_check_lock_status(mtd); | |
732 | return; | |
733 | } | |
734 | ||
735 | /* All blocks on another chip */ | |
736 | ofs = this->chipsize >> 1; | |
737 | len = this->chipsize >> 1; | |
738 | } | |
739 | ||
740 | s3c_onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK); | |
741 | ||
742 | s3c_onenand_check_lock_status(mtd); | |
743 | } | |
744 | ||
745 | static void s3c_onenand_setup(struct mtd_info *mtd) | |
746 | { | |
747 | struct onenand_chip *this = mtd->priv; | |
748 | ||
749 | onenand->mtd = mtd; | |
750 | ||
751 | if (onenand->type == TYPE_S3C6400) { | |
752 | onenand->mem_addr = s3c6400_mem_addr; | |
753 | onenand->cmd_map = s3c64xx_cmd_map; | |
754 | } else if (onenand->type == TYPE_S3C6410) { | |
755 | onenand->mem_addr = s3c6410_mem_addr; | |
756 | onenand->cmd_map = s3c64xx_cmd_map; | |
757 | } else if (onenand->type == TYPE_S5PC100) { | |
758 | onenand->mem_addr = s5pc100_mem_addr; | |
759 | onenand->cmd_map = s5pc1xx_cmd_map; | |
760 | } else if (onenand->type == TYPE_S5PC110) { | |
761 | /* Use generic onenand functions */ | |
46f3e88b | 762 | this->read_bufferram = s5pc110_read_bufferram; |
7b0507eb | 763 | this->chip_probe = s5pc110_chip_probe; |
46f3e88b KP |
764 | return; |
765 | } else { | |
766 | BUG(); | |
767 | } | |
768 | ||
769 | this->read_word = s3c_onenand_readw; | |
770 | this->write_word = s3c_onenand_writew; | |
771 | ||
772 | this->wait = s3c_onenand_wait; | |
773 | this->bbt_wait = s3c_onenand_bbt_wait; | |
774 | this->unlock_all = s3c_unlock_all; | |
775 | this->command = s3c_onenand_command; | |
776 | ||
777 | this->read_bufferram = onenand_read_bufferram; | |
778 | this->write_bufferram = onenand_write_bufferram; | |
779 | } | |
780 | ||
781 | static int s3c_onenand_probe(struct platform_device *pdev) | |
782 | { | |
783 | struct onenand_platform_data *pdata; | |
784 | struct onenand_chip *this; | |
785 | struct mtd_info *mtd; | |
786 | struct resource *r; | |
787 | int size, err; | |
46f3e88b KP |
788 | |
789 | pdata = pdev->dev.platform_data; | |
790 | /* No need to check pdata. the platform data is optional */ | |
791 | ||
792 | size = sizeof(struct mtd_info) + sizeof(struct onenand_chip); | |
793 | mtd = kzalloc(size, GFP_KERNEL); | |
794 | if (!mtd) { | |
795 | dev_err(&pdev->dev, "failed to allocate memory\n"); | |
796 | return -ENOMEM; | |
797 | } | |
798 | ||
799 | onenand = kzalloc(sizeof(struct s3c_onenand), GFP_KERNEL); | |
800 | if (!onenand) { | |
801 | err = -ENOMEM; | |
802 | goto onenand_fail; | |
803 | } | |
804 | ||
805 | this = (struct onenand_chip *) &mtd[1]; | |
806 | mtd->priv = this; | |
807 | mtd->dev.parent = &pdev->dev; | |
808 | mtd->owner = THIS_MODULE; | |
809 | onenand->pdev = pdev; | |
810 | onenand->type = platform_get_device_id(pdev)->driver_data; | |
811 | ||
812 | s3c_onenand_setup(mtd); | |
813 | ||
814 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
815 | if (!r) { | |
816 | dev_err(&pdev->dev, "no memory resource defined\n"); | |
817 | return -ENOENT; | |
818 | goto ahb_resource_failed; | |
819 | } | |
820 | ||
821 | onenand->base_res = request_mem_region(r->start, resource_size(r), | |
822 | pdev->name); | |
823 | if (!onenand->base_res) { | |
824 | dev_err(&pdev->dev, "failed to request memory resource\n"); | |
825 | err = -EBUSY; | |
826 | goto resource_failed; | |
827 | } | |
828 | ||
829 | onenand->base = ioremap(r->start, resource_size(r)); | |
830 | if (!onenand->base) { | |
831 | dev_err(&pdev->dev, "failed to map memory resource\n"); | |
832 | err = -EFAULT; | |
833 | goto ioremap_failed; | |
834 | } | |
835 | /* Set onenand_chip also */ | |
836 | this->base = onenand->base; | |
837 | ||
838 | /* Use runtime badblock check */ | |
839 | this->options |= ONENAND_SKIP_UNLOCK_CHECK; | |
840 | ||
841 | if (onenand->type != TYPE_S5PC110) { | |
842 | r = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
843 | if (!r) { | |
844 | dev_err(&pdev->dev, "no buffer memory resource defined\n"); | |
845 | return -ENOENT; | |
846 | goto ahb_resource_failed; | |
847 | } | |
848 | ||
849 | onenand->ahb_res = request_mem_region(r->start, resource_size(r), | |
850 | pdev->name); | |
851 | if (!onenand->ahb_res) { | |
852 | dev_err(&pdev->dev, "failed to request buffer memory resource\n"); | |
853 | err = -EBUSY; | |
854 | goto ahb_resource_failed; | |
855 | } | |
856 | ||
857 | onenand->ahb_addr = ioremap(r->start, resource_size(r)); | |
858 | if (!onenand->ahb_addr) { | |
859 | dev_err(&pdev->dev, "failed to map buffer memory resource\n"); | |
860 | err = -EINVAL; | |
861 | goto ahb_ioremap_failed; | |
862 | } | |
863 | ||
864 | /* Allocate 4KiB BufferRAM */ | |
865 | onenand->page_buf = kzalloc(SZ_4K, GFP_KERNEL); | |
866 | if (!onenand->page_buf) { | |
867 | err = -ENOMEM; | |
868 | goto page_buf_fail; | |
869 | } | |
870 | ||
871 | /* Allocate 128 SpareRAM */ | |
872 | onenand->oob_buf = kzalloc(128, GFP_KERNEL); | |
873 | if (!onenand->oob_buf) { | |
874 | err = -ENOMEM; | |
875 | goto oob_buf_fail; | |
876 | } | |
877 | ||
878 | /* S3C doesn't handle subpage write */ | |
879 | mtd->subpage_sft = 0; | |
880 | this->subpagesize = mtd->writesize; | |
881 | ||
882 | } else { /* S5PC110 */ | |
883 | r = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
884 | if (!r) { | |
885 | dev_err(&pdev->dev, "no dma memory resource defined\n"); | |
886 | return -ENOENT; | |
887 | goto dma_resource_failed; | |
888 | } | |
889 | ||
890 | onenand->dma_res = request_mem_region(r->start, resource_size(r), | |
891 | pdev->name); | |
892 | if (!onenand->dma_res) { | |
893 | dev_err(&pdev->dev, "failed to request dma memory resource\n"); | |
894 | err = -EBUSY; | |
895 | goto dma_resource_failed; | |
896 | } | |
897 | ||
898 | onenand->dma_addr = ioremap(r->start, resource_size(r)); | |
899 | if (!onenand->dma_addr) { | |
900 | dev_err(&pdev->dev, "failed to map dma memory resource\n"); | |
901 | err = -EINVAL; | |
902 | goto dma_ioremap_failed; | |
903 | } | |
904 | ||
905 | onenand->phys_base = onenand->base_res->start; | |
46f3e88b KP |
906 | } |
907 | ||
908 | if (onenand_scan(mtd, 1)) { | |
909 | err = -EFAULT; | |
910 | goto scan_failed; | |
911 | } | |
912 | ||
7b0507eb | 913 | if (onenand->type != TYPE_S5PC110) { |
46f3e88b KP |
914 | /* S3C doesn't handle subpage write */ |
915 | mtd->subpage_sft = 0; | |
916 | this->subpagesize = mtd->writesize; | |
917 | } | |
918 | ||
919 | if (s3c_read_reg(MEM_CFG_OFFSET) & ONENAND_SYS_CFG1_SYNC_READ) | |
920 | dev_info(&onenand->pdev->dev, "OneNAND Sync. Burst Read enabled\n"); | |
921 | ||
922 | #ifdef CONFIG_MTD_PARTITIONS | |
923 | err = parse_mtd_partitions(mtd, part_probes, &onenand->parts, 0); | |
924 | if (err > 0) | |
925 | add_mtd_partitions(mtd, onenand->parts, err); | |
926 | else if (err <= 0 && pdata && pdata->parts) | |
927 | add_mtd_partitions(mtd, pdata->parts, pdata->nr_parts); | |
928 | else | |
929 | #endif | |
930 | err = add_mtd_device(mtd); | |
931 | ||
932 | platform_set_drvdata(pdev, mtd); | |
933 | ||
934 | return 0; | |
935 | ||
936 | scan_failed: | |
937 | if (onenand->dma_addr) | |
938 | iounmap(onenand->dma_addr); | |
939 | dma_ioremap_failed: | |
940 | if (onenand->dma_res) | |
941 | release_mem_region(onenand->dma_res->start, | |
942 | resource_size(onenand->dma_res)); | |
943 | kfree(onenand->oob_buf); | |
944 | oob_buf_fail: | |
945 | kfree(onenand->page_buf); | |
946 | page_buf_fail: | |
947 | if (onenand->ahb_addr) | |
948 | iounmap(onenand->ahb_addr); | |
949 | ahb_ioremap_failed: | |
950 | if (onenand->ahb_res) | |
951 | release_mem_region(onenand->ahb_res->start, | |
952 | resource_size(onenand->ahb_res)); | |
953 | dma_resource_failed: | |
954 | ahb_resource_failed: | |
955 | iounmap(onenand->base); | |
956 | ioremap_failed: | |
957 | if (onenand->base_res) | |
958 | release_mem_region(onenand->base_res->start, | |
959 | resource_size(onenand->base_res)); | |
960 | resource_failed: | |
961 | kfree(onenand); | |
962 | onenand_fail: | |
963 | kfree(mtd); | |
964 | return err; | |
965 | } | |
966 | ||
967 | static int __devexit s3c_onenand_remove(struct platform_device *pdev) | |
968 | { | |
969 | struct mtd_info *mtd = platform_get_drvdata(pdev); | |
970 | ||
971 | onenand_release(mtd); | |
972 | if (onenand->ahb_addr) | |
973 | iounmap(onenand->ahb_addr); | |
974 | if (onenand->ahb_res) | |
975 | release_mem_region(onenand->ahb_res->start, | |
976 | resource_size(onenand->ahb_res)); | |
977 | if (onenand->dma_addr) | |
978 | iounmap(onenand->dma_addr); | |
979 | if (onenand->dma_res) | |
980 | release_mem_region(onenand->dma_res->start, | |
981 | resource_size(onenand->dma_res)); | |
982 | ||
983 | iounmap(onenand->base); | |
984 | release_mem_region(onenand->base_res->start, | |
985 | resource_size(onenand->base_res)); | |
986 | ||
987 | platform_set_drvdata(pdev, NULL); | |
988 | kfree(onenand->oob_buf); | |
989 | kfree(onenand->page_buf); | |
990 | kfree(onenand); | |
991 | kfree(mtd); | |
992 | return 0; | |
993 | } | |
994 | ||
995 | static int s3c_pm_ops_suspend(struct device *dev) | |
996 | { | |
997 | struct platform_device *pdev = to_platform_device(dev); | |
998 | struct mtd_info *mtd = platform_get_drvdata(pdev); | |
999 | struct onenand_chip *this = mtd->priv; | |
1000 | ||
1001 | this->wait(mtd, FL_PM_SUSPENDED); | |
1002 | return mtd->suspend(mtd); | |
1003 | } | |
1004 | ||
1005 | static int s3c_pm_ops_resume(struct device *dev) | |
1006 | { | |
1007 | struct platform_device *pdev = to_platform_device(dev); | |
1008 | struct mtd_info *mtd = platform_get_drvdata(pdev); | |
1009 | struct onenand_chip *this = mtd->priv; | |
1010 | ||
1011 | mtd->resume(mtd); | |
1012 | this->unlock_all(mtd); | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | static const struct dev_pm_ops s3c_pm_ops = { | |
1017 | .suspend = s3c_pm_ops_suspend, | |
1018 | .resume = s3c_pm_ops_resume, | |
1019 | }; | |
1020 | ||
1021 | static struct platform_device_id s3c_onenand_driver_ids[] = { | |
1022 | { | |
1023 | .name = "s3c6400-onenand", | |
1024 | .driver_data = TYPE_S3C6400, | |
1025 | }, { | |
1026 | .name = "s3c6410-onenand", | |
1027 | .driver_data = TYPE_S3C6410, | |
1028 | }, { | |
1029 | .name = "s5pc100-onenand", | |
1030 | .driver_data = TYPE_S5PC100, | |
1031 | }, { | |
1032 | .name = "s5pc110-onenand", | |
1033 | .driver_data = TYPE_S5PC110, | |
1034 | }, { }, | |
1035 | }; | |
1036 | MODULE_DEVICE_TABLE(platform, s3c_onenand_driver_ids); | |
1037 | ||
1038 | static struct platform_driver s3c_onenand_driver = { | |
1039 | .driver = { | |
1040 | .name = "samsung-onenand", | |
1041 | .pm = &s3c_pm_ops, | |
1042 | }, | |
1043 | .id_table = s3c_onenand_driver_ids, | |
1044 | .probe = s3c_onenand_probe, | |
1045 | .remove = __devexit_p(s3c_onenand_remove), | |
1046 | }; | |
1047 | ||
1048 | static int __init s3c_onenand_init(void) | |
1049 | { | |
1050 | return platform_driver_register(&s3c_onenand_driver); | |
1051 | } | |
1052 | ||
1053 | static void __exit s3c_onenand_exit(void) | |
1054 | { | |
1055 | platform_driver_unregister(&s3c_onenand_driver); | |
1056 | } | |
1057 | ||
1058 | module_init(s3c_onenand_init); | |
1059 | module_exit(s3c_onenand_exit); | |
1060 | ||
1061 | MODULE_LICENSE("GPL"); | |
1062 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); | |
1063 | MODULE_DESCRIPTION("Samsung OneNAND controller support"); |