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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / mtd / nand / raw / hisi504_nand.c
blob0b48be54ba6f211e81cf1696613ee96f9e5bb83c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Hisilicon NAND Flash controller driver
4 *
5 * Copyright © 2012-2014 HiSilicon Technologies Co., Ltd.
6 * http://www.hisilicon.com
7 *
8 * Author: Zhou Wang <wangzhou.bry@gmail.com>
9 * The initial developer of the original code is Zhiyong Cai
10 * <caizhiyong@huawei.com>
11 */
12 #include <linux/of.h>
13 #include <linux/mtd/mtd.h>
14 #include <linux/sizes.h>
15 #include <linux/clk.h>
16 #include <linux/slab.h>
17 #include <linux/module.h>
18 #include <linux/delay.h>
19 #include <linux/interrupt.h>
20 #include <linux/mtd/rawnand.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/platform_device.h>
23 #include <linux/mtd/partitions.h>
24
25 #define HINFC504_MAX_CHIP (4)
26 #define HINFC504_W_LATCH (5)
27 #define HINFC504_R_LATCH (7)
28 #define HINFC504_RW_LATCH (3)
29
30 #define HINFC504_NFC_TIMEOUT (2 * HZ)
31 #define HINFC504_NFC_PM_TIMEOUT (1 * HZ)
32 #define HINFC504_NFC_DMA_TIMEOUT (5 * HZ)
33 #define HINFC504_CHIP_DELAY (25)
34
35 #define HINFC504_REG_BASE_ADDRESS_LEN (0x100)
36 #define HINFC504_BUFFER_BASE_ADDRESS_LEN (2048 + 128)
37
38 #define HINFC504_ADDR_CYCLE_MASK 0x4
39
40 #define HINFC504_CON 0x00
41 #define HINFC504_CON_OP_MODE_NORMAL BIT(0)
42 #define HINFC504_CON_PAGEISZE_SHIFT (1)
43 #define HINFC504_CON_PAGESIZE_MASK (0x07)
44 #define HINFC504_CON_BUS_WIDTH BIT(4)
45 #define HINFC504_CON_READY_BUSY_SEL BIT(8)
46 #define HINFC504_CON_ECCTYPE_SHIFT (9)
47 #define HINFC504_CON_ECCTYPE_MASK (0x07)
48
49 #define HINFC504_PWIDTH 0x04
50 #define SET_HINFC504_PWIDTH(_w_lcnt, _r_lcnt, _rw_hcnt) \
51 ((_w_lcnt) | (((_r_lcnt) & 0x0F) << 4) | (((_rw_hcnt) & 0x0F) << 8))
52
53 #define HINFC504_CMD 0x0C
54 #define HINFC504_ADDRL 0x10
55 #define HINFC504_ADDRH 0x14
56 #define HINFC504_DATA_NUM 0x18
57
58 #define HINFC504_OP 0x1C
59 #define HINFC504_OP_READ_DATA_EN BIT(1)
60 #define HINFC504_OP_WAIT_READY_EN BIT(2)
61 #define HINFC504_OP_CMD2_EN BIT(3)
62 #define HINFC504_OP_WRITE_DATA_EN BIT(4)
63 #define HINFC504_OP_ADDR_EN BIT(5)
64 #define HINFC504_OP_CMD1_EN BIT(6)
65 #define HINFC504_OP_NF_CS_SHIFT (7)
66 #define HINFC504_OP_NF_CS_MASK (3)
67 #define HINFC504_OP_ADDR_CYCLE_SHIFT (9)
68 #define HINFC504_OP_ADDR_CYCLE_MASK (7)
69
70 #define HINFC504_STATUS 0x20
71 #define HINFC504_READY BIT(0)
72
73 #define HINFC504_INTEN 0x24
74 #define HINFC504_INTEN_DMA BIT(9)
75 #define HINFC504_INTEN_UE BIT(6)
76 #define HINFC504_INTEN_CE BIT(5)
77
78 #define HINFC504_INTS 0x28
79 #define HINFC504_INTS_DMA BIT(9)
80 #define HINFC504_INTS_UE BIT(6)
81 #define HINFC504_INTS_CE BIT(5)
82
83 #define HINFC504_INTCLR 0x2C
84 #define HINFC504_INTCLR_DMA BIT(9)
85 #define HINFC504_INTCLR_UE BIT(6)
86 #define HINFC504_INTCLR_CE BIT(5)
87
88 #define HINFC504_ECC_STATUS 0x5C
89 #define HINFC504_ECC_16_BIT_SHIFT 12
90
91 #define HINFC504_DMA_CTRL 0x60
92 #define HINFC504_DMA_CTRL_DMA_START BIT(0)
93 #define HINFC504_DMA_CTRL_WE BIT(1)
94 #define HINFC504_DMA_CTRL_DATA_AREA_EN BIT(2)
95 #define HINFC504_DMA_CTRL_OOB_AREA_EN BIT(3)
96 #define HINFC504_DMA_CTRL_BURST4_EN BIT(4)
97 #define HINFC504_DMA_CTRL_BURST8_EN BIT(5)
98 #define HINFC504_DMA_CTRL_BURST16_EN BIT(6)
99 #define HINFC504_DMA_CTRL_ADDR_NUM_SHIFT (7)
100 #define HINFC504_DMA_CTRL_ADDR_NUM_MASK (1)
101 #define HINFC504_DMA_CTRL_CS_SHIFT (8)
102 #define HINFC504_DMA_CTRL_CS_MASK (0x03)
103
104 #define HINFC504_DMA_ADDR_DATA 0x64
105 #define HINFC504_DMA_ADDR_OOB 0x68
106
107 #define HINFC504_DMA_LEN 0x6C
108 #define HINFC504_DMA_LEN_OOB_SHIFT (16)
109 #define HINFC504_DMA_LEN_OOB_MASK (0xFFF)
110
111 #define HINFC504_DMA_PARA 0x70
112 #define HINFC504_DMA_PARA_DATA_RW_EN BIT(0)
113 #define HINFC504_DMA_PARA_OOB_RW_EN BIT(1)
114 #define HINFC504_DMA_PARA_DATA_EDC_EN BIT(2)
115 #define HINFC504_DMA_PARA_OOB_EDC_EN BIT(3)
116 #define HINFC504_DMA_PARA_DATA_ECC_EN BIT(4)
117 #define HINFC504_DMA_PARA_OOB_ECC_EN BIT(5)
118
119 #define HINFC_VERSION 0x74
120 #define HINFC504_LOG_READ_ADDR 0x7C
121 #define HINFC504_LOG_READ_LEN 0x80
122
123 #define HINFC504_NANDINFO_LEN 0x10
124
125 struct hinfc_host {
126 struct nand_chip chip;
127 struct device *dev;
128 void __iomem *iobase;
129 void __iomem *mmio;
130 struct completion cmd_complete;
131 unsigned int offset;
132 unsigned int command;
133 int chipselect;
134 unsigned int addr_cycle;
135 u32 addr_value[2];
136 u32 cache_addr_value[2];
137 char *buffer;
138 dma_addr_t dma_buffer;
139 dma_addr_t dma_oob;
140 int version;
141 unsigned int irq_status; /* interrupt status */
142 };
143
144 static inline unsigned int hinfc_read(struct hinfc_host *host, unsigned int reg)
145 {
146 return readl(host->iobase + reg);
147 }
148
149 static inline void hinfc_write(struct hinfc_host *host, unsigned int value,
150 unsigned int reg)
151 {
152 writel(value, host->iobase + reg);
153 }
154
155 static void wait_controller_finished(struct hinfc_host *host)
156 {
157 unsigned long timeout = jiffies + HINFC504_NFC_TIMEOUT;
158 int val;
159
160 while (time_before(jiffies, timeout)) {
161 val = hinfc_read(host, HINFC504_STATUS);
162 if (host->command == NAND_CMD_ERASE2) {
163 /* nfc is ready */
164 while (!(val & HINFC504_READY)) {
165 usleep_range(500, 1000);
166 val = hinfc_read(host, HINFC504_STATUS);
167 }
168 return;
169 }
170
171 if (val & HINFC504_READY)
172 return;
173 }
174
175 /* wait cmd timeout */
176 dev_err(host->dev, "Wait NAND controller exec cmd timeout.\n");
177 }
178
179 static void hisi_nfc_dma_transfer(struct hinfc_host *host, int todev)
180 {
181 struct nand_chip *chip = &host->chip;
182 struct mtd_info *mtd = nand_to_mtd(chip);
183 unsigned long val;
184 int ret;
185
186 hinfc_write(host, host->dma_buffer, HINFC504_DMA_ADDR_DATA);
187 hinfc_write(host, host->dma_oob, HINFC504_DMA_ADDR_OOB);
188
189 if (chip->ecc.mode == NAND_ECC_NONE) {
190 hinfc_write(host, ((mtd->oobsize & HINFC504_DMA_LEN_OOB_MASK)
191 << HINFC504_DMA_LEN_OOB_SHIFT), HINFC504_DMA_LEN);
192
193 hinfc_write(host, HINFC504_DMA_PARA_DATA_RW_EN
194 | HINFC504_DMA_PARA_OOB_RW_EN, HINFC504_DMA_PARA);
195 } else {
196 if (host->command == NAND_CMD_READOOB)
197 hinfc_write(host, HINFC504_DMA_PARA_OOB_RW_EN
198 | HINFC504_DMA_PARA_OOB_EDC_EN
199 | HINFC504_DMA_PARA_OOB_ECC_EN, HINFC504_DMA_PARA);
200 else
201 hinfc_write(host, HINFC504_DMA_PARA_DATA_RW_EN
202 | HINFC504_DMA_PARA_OOB_RW_EN
203 | HINFC504_DMA_PARA_DATA_EDC_EN
204 | HINFC504_DMA_PARA_OOB_EDC_EN
205 | HINFC504_DMA_PARA_DATA_ECC_EN
206 | HINFC504_DMA_PARA_OOB_ECC_EN, HINFC504_DMA_PARA);
207
208 }
209
210 val = (HINFC504_DMA_CTRL_DMA_START | HINFC504_DMA_CTRL_BURST4_EN
211 | HINFC504_DMA_CTRL_BURST8_EN | HINFC504_DMA_CTRL_BURST16_EN
212 | HINFC504_DMA_CTRL_DATA_AREA_EN | HINFC504_DMA_CTRL_OOB_AREA_EN
213 | ((host->addr_cycle == 4 ? 1 : 0)
214 << HINFC504_DMA_CTRL_ADDR_NUM_SHIFT)
215 | ((host->chipselect & HINFC504_DMA_CTRL_CS_MASK)
216 << HINFC504_DMA_CTRL_CS_SHIFT));
217
218 if (todev)
219 val |= HINFC504_DMA_CTRL_WE;
220
221 init_completion(&host->cmd_complete);
222
223 hinfc_write(host, val, HINFC504_DMA_CTRL);
224 ret = wait_for_completion_timeout(&host->cmd_complete,
225 HINFC504_NFC_DMA_TIMEOUT);
226
227 if (!ret) {
228 dev_err(host->dev, "DMA operation(irq) timeout!\n");
229 /* sanity check */
230 val = hinfc_read(host, HINFC504_DMA_CTRL);
231 if (!(val & HINFC504_DMA_CTRL_DMA_START))
232 dev_err(host->dev, "DMA is already done but without irq ACK!\n");
233 else
234 dev_err(host->dev, "DMA is really timeout!\n");
235 }
236 }
237
238 static int hisi_nfc_send_cmd_pageprog(struct hinfc_host *host)
239 {
240 host->addr_value[0] &= 0xffff0000;
241
242 hinfc_write(host, host->addr_value[0], HINFC504_ADDRL);
243 hinfc_write(host, host->addr_value[1], HINFC504_ADDRH);
244 hinfc_write(host, NAND_CMD_PAGEPROG << 8 | NAND_CMD_SEQIN,
245 HINFC504_CMD);
246
247 hisi_nfc_dma_transfer(host, 1);
248
249 return 0;
250 }
251
252 static int hisi_nfc_send_cmd_readstart(struct hinfc_host *host)
253 {
254 struct mtd_info *mtd = nand_to_mtd(&host->chip);
255
256 if ((host->addr_value[0] == host->cache_addr_value[0]) &&
257 (host->addr_value[1] == host->cache_addr_value[1]))
258 return 0;
259
260 host->addr_value[0] &= 0xffff0000;
261
262 hinfc_write(host, host->addr_value[0], HINFC504_ADDRL);
263 hinfc_write(host, host->addr_value[1], HINFC504_ADDRH);
264 hinfc_write(host, NAND_CMD_READSTART << 8 | NAND_CMD_READ0,
265 HINFC504_CMD);
266
267 hinfc_write(host, 0, HINFC504_LOG_READ_ADDR);
268 hinfc_write(host, mtd->writesize + mtd->oobsize,
269 HINFC504_LOG_READ_LEN);
270
271 hisi_nfc_dma_transfer(host, 0);
272
273 host->cache_addr_value[0] = host->addr_value[0];
274 host->cache_addr_value[1] = host->addr_value[1];
275
276 return 0;
277 }
278
279 static int hisi_nfc_send_cmd_erase(struct hinfc_host *host)
280 {
281 hinfc_write(host, host->addr_value[0], HINFC504_ADDRL);
282 hinfc_write(host, (NAND_CMD_ERASE2 << 8) | NAND_CMD_ERASE1,
283 HINFC504_CMD);
284
285 hinfc_write(host, HINFC504_OP_WAIT_READY_EN
286 | HINFC504_OP_CMD2_EN
287 | HINFC504_OP_CMD1_EN
288 | HINFC504_OP_ADDR_EN
289 | ((host->chipselect & HINFC504_OP_NF_CS_MASK)
290 << HINFC504_OP_NF_CS_SHIFT)
291 | ((host->addr_cycle & HINFC504_OP_ADDR_CYCLE_MASK)
292 << HINFC504_OP_ADDR_CYCLE_SHIFT),
293 HINFC504_OP);
294
295 wait_controller_finished(host);
296
297 return 0;
298 }
299
300 static int hisi_nfc_send_cmd_readid(struct hinfc_host *host)
301 {
302 hinfc_write(host, HINFC504_NANDINFO_LEN, HINFC504_DATA_NUM);
303 hinfc_write(host, NAND_CMD_READID, HINFC504_CMD);
304 hinfc_write(host, 0, HINFC504_ADDRL);
305
306 hinfc_write(host, HINFC504_OP_CMD1_EN | HINFC504_OP_ADDR_EN
307 | HINFC504_OP_READ_DATA_EN
308 | ((host->chipselect & HINFC504_OP_NF_CS_MASK)
309 << HINFC504_OP_NF_CS_SHIFT)
310 | 1 << HINFC504_OP_ADDR_CYCLE_SHIFT, HINFC504_OP);
311
312 wait_controller_finished(host);
313
314 return 0;
315 }
316
317 static int hisi_nfc_send_cmd_status(struct hinfc_host *host)
318 {
319 hinfc_write(host, HINFC504_NANDINFO_LEN, HINFC504_DATA_NUM);
320 hinfc_write(host, NAND_CMD_STATUS, HINFC504_CMD);
321 hinfc_write(host, HINFC504_OP_CMD1_EN
322 | HINFC504_OP_READ_DATA_EN
323 | ((host->chipselect & HINFC504_OP_NF_CS_MASK)
324 << HINFC504_OP_NF_CS_SHIFT),
325 HINFC504_OP);
326
327 wait_controller_finished(host);
328
329 return 0;
330 }
331
332 static int hisi_nfc_send_cmd_reset(struct hinfc_host *host, int chipselect)
333 {
334 hinfc_write(host, NAND_CMD_RESET, HINFC504_CMD);
335
336 hinfc_write(host, HINFC504_OP_CMD1_EN
337 | ((chipselect & HINFC504_OP_NF_CS_MASK)
338 << HINFC504_OP_NF_CS_SHIFT)
339 | HINFC504_OP_WAIT_READY_EN,
340 HINFC504_OP);
341
342 wait_controller_finished(host);
343
344 return 0;
345 }
346
347 static void hisi_nfc_select_chip(struct nand_chip *chip, int chipselect)
348 {
349 struct hinfc_host *host = nand_get_controller_data(chip);
350
351 if (chipselect < 0)
352 return;
353
354 host->chipselect = chipselect;
355 }
356
357 static uint8_t hisi_nfc_read_byte(struct nand_chip *chip)
358 {
359 struct hinfc_host *host = nand_get_controller_data(chip);
360
361 if (host->command == NAND_CMD_STATUS)
362 return *(uint8_t *)(host->mmio);
363
364 host->offset++;
365
366 if (host->command == NAND_CMD_READID)
367 return *(uint8_t *)(host->mmio + host->offset - 1);
368
369 return *(uint8_t *)(host->buffer + host->offset - 1);
370 }
371
372 static void
373 hisi_nfc_write_buf(struct nand_chip *chip, const uint8_t *buf, int len)
374 {
375 struct hinfc_host *host = nand_get_controller_data(chip);
376
377 memcpy(host->buffer + host->offset, buf, len);
378 host->offset += len;
379 }
380
381 static void hisi_nfc_read_buf(struct nand_chip *chip, uint8_t *buf, int len)
382 {
383 struct hinfc_host *host = nand_get_controller_data(chip);
384
385 memcpy(buf, host->buffer + host->offset, len);
386 host->offset += len;
387 }
388
389 static void set_addr(struct mtd_info *mtd, int column, int page_addr)
390 {
391 struct nand_chip *chip = mtd_to_nand(mtd);
392 struct hinfc_host *host = nand_get_controller_data(chip);
393 unsigned int command = host->command;
394
395 host->addr_cycle = 0;
396 host->addr_value[0] = 0;
397 host->addr_value[1] = 0;
398
399 /* Serially input address */
400 if (column != -1) {
401 /* Adjust columns for 16 bit buswidth */
402 if (chip->options & NAND_BUSWIDTH_16 &&
403 !nand_opcode_8bits(command))
404 column >>= 1;
405
406 host->addr_value[0] = column & 0xffff;
407 host->addr_cycle = 2;
408 }
409 if (page_addr != -1) {
410 host->addr_value[0] |= (page_addr & 0xffff)
411 << (host->addr_cycle * 8);
412 host->addr_cycle += 2;
413 if (chip->options & NAND_ROW_ADDR_3) {
414 host->addr_cycle += 1;
415 if (host->command == NAND_CMD_ERASE1)
416 host->addr_value[0] |= ((page_addr >> 16) & 0xff) << 16;
417 else
418 host->addr_value[1] |= ((page_addr >> 16) & 0xff);
419 }
420 }
421 }
422
423 static void hisi_nfc_cmdfunc(struct nand_chip *chip, unsigned command,
424 int column, int page_addr)
425 {
426 struct mtd_info *mtd = nand_to_mtd(chip);
427 struct hinfc_host *host = nand_get_controller_data(chip);
428 int is_cache_invalid = 1;
429 unsigned int flag = 0;
430
431 host->command = command;
432
433 switch (command) {
434 case NAND_CMD_READ0:
435 case NAND_CMD_READOOB:
436 if (command == NAND_CMD_READ0)
437 host->offset = column;
438 else
439 host->offset = column + mtd->writesize;
440
441 is_cache_invalid = 0;
442 set_addr(mtd, column, page_addr);
443 hisi_nfc_send_cmd_readstart(host);
444 break;
445
446 case NAND_CMD_SEQIN:
447 host->offset = column;
448 set_addr(mtd, column, page_addr);
449 break;
450
451 case NAND_CMD_ERASE1:
452 set_addr(mtd, column, page_addr);
453 break;
454
455 case NAND_CMD_PAGEPROG:
456 hisi_nfc_send_cmd_pageprog(host);
457 break;
458
459 case NAND_CMD_ERASE2:
460 hisi_nfc_send_cmd_erase(host);
461 break;
462
463 case NAND_CMD_READID:
464 host->offset = column;
465 memset(host->mmio, 0, 0x10);
466 hisi_nfc_send_cmd_readid(host);
467 break;
468
469 case NAND_CMD_STATUS:
470 flag = hinfc_read(host, HINFC504_CON);
471 if (chip->ecc.mode == NAND_ECC_HW)
472 hinfc_write(host,
473 flag & ~(HINFC504_CON_ECCTYPE_MASK <<
474 HINFC504_CON_ECCTYPE_SHIFT), HINFC504_CON);
475
476 host->offset = 0;
477 memset(host->mmio, 0, 0x10);
478 hisi_nfc_send_cmd_status(host);
479 hinfc_write(host, flag, HINFC504_CON);
480 break;
481
482 case NAND_CMD_RESET:
483 hisi_nfc_send_cmd_reset(host, host->chipselect);
484 break;
485
486 default:
487 dev_err(host->dev, "Error: unsupported cmd(cmd=%x, col=%x, page=%x)\n",
488 command, column, page_addr);
489 }
490
491 if (is_cache_invalid) {
492 host->cache_addr_value[0] = ~0;
493 host->cache_addr_value[1] = ~0;
494 }
495 }
496
497 static irqreturn_t hinfc_irq_handle(int irq, void *devid)
498 {
499 struct hinfc_host *host = devid;
500 unsigned int flag;
501
502 flag = hinfc_read(host, HINFC504_INTS);
503 /* store interrupts state */
504 host->irq_status |= flag;
505
506 if (flag & HINFC504_INTS_DMA) {
507 hinfc_write(host, HINFC504_INTCLR_DMA, HINFC504_INTCLR);
508 complete(&host->cmd_complete);
509 } else if (flag & HINFC504_INTS_CE) {
510 hinfc_write(host, HINFC504_INTCLR_CE, HINFC504_INTCLR);
511 } else if (flag & HINFC504_INTS_UE) {
512 hinfc_write(host, HINFC504_INTCLR_UE, HINFC504_INTCLR);
513 }
514
515 return IRQ_HANDLED;
516 }
517
518 static int hisi_nand_read_page_hwecc(struct nand_chip *chip, uint8_t *buf,
519 int oob_required, int page)
520 {
521 struct mtd_info *mtd = nand_to_mtd(chip);
522 struct hinfc_host *host = nand_get_controller_data(chip);
523 int max_bitflips = 0, stat = 0, stat_max = 0, status_ecc;
524 int stat_1, stat_2;
525
526 nand_read_page_op(chip, page, 0, buf, mtd->writesize);
527 chip->legacy.read_buf(chip, chip->oob_poi, mtd->oobsize);
528
529 /* errors which can not be corrected by ECC */
530 if (host->irq_status & HINFC504_INTS_UE) {
531 mtd->ecc_stats.failed++;
532 } else if (host->irq_status & HINFC504_INTS_CE) {
533 /* TODO: need add other ECC modes! */
534 switch (chip->ecc.strength) {
535 case 16:
536 status_ecc = hinfc_read(host, HINFC504_ECC_STATUS) >>
537 HINFC504_ECC_16_BIT_SHIFT & 0x0fff;
538 stat_2 = status_ecc & 0x3f;
539 stat_1 = status_ecc >> 6 & 0x3f;
540 stat = stat_1 + stat_2;
541 stat_max = max_t(int, stat_1, stat_2);
542 }
543 mtd->ecc_stats.corrected += stat;
544 max_bitflips = max_t(int, max_bitflips, stat_max);
545 }
546 host->irq_status = 0;
547
548 return max_bitflips;
549 }
550
551 static int hisi_nand_read_oob(struct nand_chip *chip, int page)
552 {
553 struct mtd_info *mtd = nand_to_mtd(chip);
554 struct hinfc_host *host = nand_get_controller_data(chip);
555
556 nand_read_oob_op(chip, page, 0, chip->oob_poi, mtd->oobsize);
557
558 if (host->irq_status & HINFC504_INTS_UE) {
559 host->irq_status = 0;
560 return -EBADMSG;
561 }
562
563 host->irq_status = 0;
564 return 0;
565 }
566
567 static int hisi_nand_write_page_hwecc(struct nand_chip *chip,
568 const uint8_t *buf, int oob_required,
569 int page)
570 {
571 struct mtd_info *mtd = nand_to_mtd(chip);
572
573 nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize);
574 if (oob_required)
575 chip->legacy.write_buf(chip, chip->oob_poi, mtd->oobsize);
576
577 return nand_prog_page_end_op(chip);
578 }
579
580 static void hisi_nfc_host_init(struct hinfc_host *host)
581 {
582 struct nand_chip *chip = &host->chip;
583 unsigned int flag = 0;
584
585 host->version = hinfc_read(host, HINFC_VERSION);
586 host->addr_cycle = 0;
587 host->addr_value[0] = 0;
588 host->addr_value[1] = 0;
589 host->cache_addr_value[0] = ~0;
590 host->cache_addr_value[1] = ~0;
591 host->chipselect = 0;
592
593 /* default page size: 2K, ecc_none. need modify */
594 flag = HINFC504_CON_OP_MODE_NORMAL | HINFC504_CON_READY_BUSY_SEL
595 | ((0x001 & HINFC504_CON_PAGESIZE_MASK)
596 << HINFC504_CON_PAGEISZE_SHIFT)
597 | ((0x0 & HINFC504_CON_ECCTYPE_MASK)
598 << HINFC504_CON_ECCTYPE_SHIFT)
599 | ((chip->options & NAND_BUSWIDTH_16) ?
600 HINFC504_CON_BUS_WIDTH : 0);
601 hinfc_write(host, flag, HINFC504_CON);
602
603 memset(host->mmio, 0xff, HINFC504_BUFFER_BASE_ADDRESS_LEN);
604
605 hinfc_write(host, SET_HINFC504_PWIDTH(HINFC504_W_LATCH,
606 HINFC504_R_LATCH, HINFC504_RW_LATCH), HINFC504_PWIDTH);
607
608 /* enable DMA irq */
609 hinfc_write(host, HINFC504_INTEN_DMA, HINFC504_INTEN);
610 }
611
612 static int hisi_ooblayout_ecc(struct mtd_info *mtd, int section,
613 struct mtd_oob_region *oobregion)
614 {
615 /* FIXME: add ECC bytes position */
616 return -ENOTSUPP;
617 }
618
619 static int hisi_ooblayout_free(struct mtd_info *mtd, int section,
620 struct mtd_oob_region *oobregion)
621 {
622 if (section)
623 return -ERANGE;
624
625 oobregion->offset = 2;
626 oobregion->length = 6;
627
628 return 0;
629 }
630
631 static const struct mtd_ooblayout_ops hisi_ooblayout_ops = {
632 .ecc = hisi_ooblayout_ecc,
633 .free = hisi_ooblayout_free,
634 };
635
636 static int hisi_nfc_ecc_probe(struct hinfc_host *host)
637 {
638 unsigned int flag;
639 int size, strength, ecc_bits;
640 struct device *dev = host->dev;
641 struct nand_chip *chip = &host->chip;
642 struct mtd_info *mtd = nand_to_mtd(chip);
643
644 size = chip->ecc.size;
645 strength = chip->ecc.strength;
646 if (size != 1024) {
647 dev_err(dev, "error ecc size: %d\n", size);
648 return -EINVAL;
649 }
650
651 if ((size == 1024) && ((strength != 8) && (strength != 16) &&
652 (strength != 24) && (strength != 40))) {
653 dev_err(dev, "ecc size and strength do not match\n");
654 return -EINVAL;
655 }
656
657 chip->ecc.size = size;
658 chip->ecc.strength = strength;
659
660 chip->ecc.read_page = hisi_nand_read_page_hwecc;
661 chip->ecc.read_oob = hisi_nand_read_oob;
662 chip->ecc.write_page = hisi_nand_write_page_hwecc;
663
664 switch (chip->ecc.strength) {
665 case 16:
666 ecc_bits = 6;
667 if (mtd->writesize == 2048)
668 mtd_set_ooblayout(mtd, &hisi_ooblayout_ops);
669
670 /* TODO: add more page size support */
671 break;
672
673 /* TODO: add more ecc strength support */
674 default:
675 dev_err(dev, "not support strength: %d\n", chip->ecc.strength);
676 return -EINVAL;
677 }
678
679 flag = hinfc_read(host, HINFC504_CON);
680 /* add ecc type configure */
681 flag |= ((ecc_bits & HINFC504_CON_ECCTYPE_MASK)
682 << HINFC504_CON_ECCTYPE_SHIFT);
683 hinfc_write(host, flag, HINFC504_CON);
684
685 /* enable ecc irq */
686 flag = hinfc_read(host, HINFC504_INTEN) & 0xfff;
687 hinfc_write(host, flag | HINFC504_INTEN_UE | HINFC504_INTEN_CE,
688 HINFC504_INTEN);
689
690 return 0;
691 }
692
693 static int hisi_nfc_attach_chip(struct nand_chip *chip)
694 {
695 struct mtd_info *mtd = nand_to_mtd(chip);
696 struct hinfc_host *host = nand_get_controller_data(chip);
697 int flag;
698
699 host->buffer = dmam_alloc_coherent(host->dev,
700 mtd->writesize + mtd->oobsize,
701 &host->dma_buffer, GFP_KERNEL);
702 if (!host->buffer)
703 return -ENOMEM;
704
705 host->dma_oob = host->dma_buffer + mtd->writesize;
706 memset(host->buffer, 0xff, mtd->writesize + mtd->oobsize);
707
708 flag = hinfc_read(host, HINFC504_CON);
709 flag &= ~(HINFC504_CON_PAGESIZE_MASK << HINFC504_CON_PAGEISZE_SHIFT);
710 switch (mtd->writesize) {
711 case 2048:
712 flag |= (0x001 << HINFC504_CON_PAGEISZE_SHIFT);
713 break;
714 /*
715 * TODO: add more pagesize support,
716 * default pagesize has been set in hisi_nfc_host_init
717 */
718 default:
719 dev_err(host->dev, "NON-2KB page size nand flash\n");
720 return -EINVAL;
721 }
722 hinfc_write(host, flag, HINFC504_CON);
723
724 if (chip->ecc.mode == NAND_ECC_HW)
725 hisi_nfc_ecc_probe(host);
726
727 return 0;
728 }
729
730 static const struct nand_controller_ops hisi_nfc_controller_ops = {
731 .attach_chip = hisi_nfc_attach_chip,
732 };
733
734 static int hisi_nfc_probe(struct platform_device *pdev)
735 {
736 int ret = 0, irq, max_chips = HINFC504_MAX_CHIP;
737 struct device *dev = &pdev->dev;
738 struct hinfc_host *host;
739 struct nand_chip *chip;
740 struct mtd_info *mtd;
741 struct resource *res;
742 struct device_node *np = dev->of_node;
743
744 host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
745 if (!host)
746 return -ENOMEM;
747 host->dev = dev;
748
749 platform_set_drvdata(pdev, host);
750 chip = &host->chip;
751 mtd = nand_to_mtd(chip);
752
753 irq = platform_get_irq(pdev, 0);
754 if (irq < 0)
755 return -ENXIO;
756
757 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
758 host->iobase = devm_ioremap_resource(dev, res);
759 if (IS_ERR(host->iobase))
760 return PTR_ERR(host->iobase);
761
762 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
763 host->mmio = devm_ioremap_resource(dev, res);
764 if (IS_ERR(host->mmio)) {
765 dev_err(dev, "devm_ioremap_resource[1] fail\n");
766 return PTR_ERR(host->mmio);
767 }
768
769 mtd->name = "hisi_nand";
770 mtd->dev.parent = &pdev->dev;
771
772 nand_set_controller_data(chip, host);
773 nand_set_flash_node(chip, np);
774 chip->legacy.cmdfunc = hisi_nfc_cmdfunc;
775 chip->legacy.select_chip = hisi_nfc_select_chip;
776 chip->legacy.read_byte = hisi_nfc_read_byte;
777 chip->legacy.write_buf = hisi_nfc_write_buf;
778 chip->legacy.read_buf = hisi_nfc_read_buf;
779 chip->legacy.chip_delay = HINFC504_CHIP_DELAY;
780 chip->legacy.set_features = nand_get_set_features_notsupp;
781 chip->legacy.get_features = nand_get_set_features_notsupp;
782
783 hisi_nfc_host_init(host);
784
785 ret = devm_request_irq(dev, irq, hinfc_irq_handle, 0x0, "nandc", host);
786 if (ret) {
787 dev_err(dev, "failed to request IRQ\n");
788 return ret;
789 }
790
791 chip->legacy.dummy_controller.ops = &hisi_nfc_controller_ops;
792 ret = nand_scan(chip, max_chips);
793 if (ret)
794 return ret;
795
796 ret = mtd_device_register(mtd, NULL, 0);
797 if (ret) {
798 dev_err(dev, "Err MTD partition=%d\n", ret);
799 nand_cleanup(chip);
800 return ret;
801 }
802
803 return 0;
804 }
805
806 static int hisi_nfc_remove(struct platform_device *pdev)
807 {
808 struct hinfc_host *host = platform_get_drvdata(pdev);
809
810 nand_release(&host->chip);
811
812 return 0;
813 }
814
815 #ifdef CONFIG_PM_SLEEP
816 static int hisi_nfc_suspend(struct device *dev)
817 {
818 struct hinfc_host *host = dev_get_drvdata(dev);
819 unsigned long timeout = jiffies + HINFC504_NFC_PM_TIMEOUT;
820
821 while (time_before(jiffies, timeout)) {
822 if (((hinfc_read(host, HINFC504_STATUS) & 0x1) == 0x0) &&
823 (hinfc_read(host, HINFC504_DMA_CTRL) &
824 HINFC504_DMA_CTRL_DMA_START)) {
825 cond_resched();
826 return 0;
827 }
828 }
829
830 dev_err(host->dev, "nand controller suspend timeout.\n");
831
832 return -EAGAIN;
833 }
834
835 static int hisi_nfc_resume(struct device *dev)
836 {
837 int cs;
838 struct hinfc_host *host = dev_get_drvdata(dev);
839 struct nand_chip *chip = &host->chip;
840
841 for (cs = 0; cs < nanddev_ntargets(&chip->base); cs++)
842 hisi_nfc_send_cmd_reset(host, cs);
843 hinfc_write(host, SET_HINFC504_PWIDTH(HINFC504_W_LATCH,
844 HINFC504_R_LATCH, HINFC504_RW_LATCH), HINFC504_PWIDTH);
845
846 return 0;
847 }
848 #endif
849 static SIMPLE_DEV_PM_OPS(hisi_nfc_pm_ops, hisi_nfc_suspend, hisi_nfc_resume);
850
851 static const struct of_device_id nfc_id_table[] = {
852 { .compatible = "hisilicon,504-nfc" },
853 {}
854 };
855 MODULE_DEVICE_TABLE(of, nfc_id_table);
856
857 static struct platform_driver hisi_nfc_driver = {
858 .driver = {
859 .name = "hisi_nand",
860 .of_match_table = nfc_id_table,
861 .pm = &hisi_nfc_pm_ops,
862 },
863 .probe = hisi_nfc_probe,
864 .remove = hisi_nfc_remove,
865 };
866
867 module_platform_driver(hisi_nfc_driver);
868
869 MODULE_LICENSE("GPL");
870 MODULE_AUTHOR("Zhou Wang");
871 MODULE_AUTHOR("Zhiyong Cai");
872 MODULE_DESCRIPTION("Hisilicon Nand Flash Controller Driver");
Linux with added FPC-III support