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1/*
2 * linux/drivers/mtd/onenand/omap2.c
3 *
4 * OneNAND driver for OMAP2 / OMAP3
5 *
6 * Copyright © 2005-2006 Nokia Corporation
7 *
8 * Author: Jarkko Lavinen <jarkko.lavinen@nokia.com> and Juha Yrjölä
9 * IRQ and DMA support written by Timo Teras
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published by
13 * the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 *
20 * You should have received a copy of the GNU General Public License along with
21 * this program; see the file COPYING. If not, write to the Free Software
22 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 *
24 */
25
26#include <linux/device.h>
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/mtd/mtd.h>
30#include <linux/mtd/onenand.h>
31#include <linux/mtd/partitions.h>
32#include <linux/platform_device.h>
33#include <linux/interrupt.h>
34#include <linux/delay.h>
35#include <linux/dma-mapping.h>
36#include <linux/io.h>
37#include <linux/slab.h>
38#include <linux/regulator/consumer.h>
39
40#include <asm/mach/flash.h>
41#include <plat/gpmc.h>
42#include <plat/onenand.h>
43#include <asm/gpio.h>
44
45#include <plat/dma.h>
46
47#include <plat/board.h>
48
49#define DRIVER_NAME "omap2-onenand"
50
51#define ONENAND_IO_SIZE SZ_128K
52#define ONENAND_BUFRAM_SIZE (1024 * 5)
53
54struct omap2_onenand {
55 struct platform_device *pdev;
56 int gpmc_cs;
57 unsigned long phys_base;
58 int gpio_irq;
59 struct mtd_info mtd;
60 struct onenand_chip onenand;
61 struct completion irq_done;
62 struct completion dma_done;
63 int dma_channel;
64 int freq;
65 int (*setup)(void __iomem *base, int *freq_ptr);
66 struct regulator *regulator;
67};
68
69static void omap2_onenand_dma_cb(int lch, u16 ch_status, void *data)
70{
71 struct omap2_onenand *c = data;
72
73 complete(&c->dma_done);
74}
75
76static irqreturn_t omap2_onenand_interrupt(int irq, void *dev_id)
77{
78 struct omap2_onenand *c = dev_id;
79
80 complete(&c->irq_done);
81
82 return IRQ_HANDLED;
83}
84
85static inline unsigned short read_reg(struct omap2_onenand *c, int reg)
86{
87 return readw(c->onenand.base + reg);
88}
89
90static inline void write_reg(struct omap2_onenand *c, unsigned short value,
91 int reg)
92{
93 writew(value, c->onenand.base + reg);
94}
95
96static void wait_err(char *msg, int state, unsigned int ctrl, unsigned int intr)
97{
98 printk(KERN_ERR "onenand_wait: %s! state %d ctrl 0x%04x intr 0x%04x\n",
99 msg, state, ctrl, intr);
100}
101
102static void wait_warn(char *msg, int state, unsigned int ctrl,
103 unsigned int intr)
104{
105 printk(KERN_WARNING "onenand_wait: %s! state %d ctrl 0x%04x "
106 "intr 0x%04x\n", msg, state, ctrl, intr);
107}
108
109static int omap2_onenand_wait(struct mtd_info *mtd, int state)
110{
111 struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
112 struct onenand_chip *this = mtd->priv;
113 unsigned int intr = 0;
114 unsigned int ctrl, ctrl_mask;
115 unsigned long timeout;
116 u32 syscfg;
117
118 if (state == FL_RESETING || state == FL_PREPARING_ERASE ||
119 state == FL_VERIFYING_ERASE) {
120 int i = 21;
121 unsigned int intr_flags = ONENAND_INT_MASTER;
122
123 switch (state) {
124 case FL_RESETING:
125 intr_flags |= ONENAND_INT_RESET;
126 break;
127 case FL_PREPARING_ERASE:
128 intr_flags |= ONENAND_INT_ERASE;
129 break;
130 case FL_VERIFYING_ERASE:
131 i = 101;
132 break;
133 }
134
135 while (--i) {
136 udelay(1);
137 intr = read_reg(c, ONENAND_REG_INTERRUPT);
138 if (intr & ONENAND_INT_MASTER)
139 break;
140 }
141 ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
142 if (ctrl & ONENAND_CTRL_ERROR) {
143 wait_err("controller error", state, ctrl, intr);
144 return -EIO;
145 }
146 if ((intr & intr_flags) == intr_flags)
147 return 0;
148 /* Continue in wait for interrupt branch */
149 }
150
151 if (state != FL_READING) {
152 int result;
153
154 /* Turn interrupts on */
155 syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
156 if (!(syscfg & ONENAND_SYS_CFG1_IOBE)) {
157 syscfg |= ONENAND_SYS_CFG1_IOBE;
158 write_reg(c, syscfg, ONENAND_REG_SYS_CFG1);
159 if (cpu_is_omap34xx())
160 /* Add a delay to let GPIO settle */
161 syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
162 }
163
164 INIT_COMPLETION(c->irq_done);
165 if (c->gpio_irq) {
166 result = gpio_get_value(c->gpio_irq);
167 if (result == -1) {
168 ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
169 intr = read_reg(c, ONENAND_REG_INTERRUPT);
170 wait_err("gpio error", state, ctrl, intr);
171 return -EIO;
172 }
173 } else
174 result = 0;
175 if (result == 0) {
176 int retry_cnt = 0;
177retry:
178 result = wait_for_completion_timeout(&c->irq_done,
179 msecs_to_jiffies(20));
180 if (result == 0) {
181 /* Timeout after 20ms */
182 ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
183 if (ctrl & ONENAND_CTRL_ONGO &&
184 !this->ongoing) {
185 /*
186 * The operation seems to be still going
187 * so give it some more time.
188 */
189 retry_cnt += 1;
190 if (retry_cnt < 3)
191 goto retry;
192 intr = read_reg(c,
193 ONENAND_REG_INTERRUPT);
194 wait_err("timeout", state, ctrl, intr);
195 return -EIO;
196 }
197 intr = read_reg(c, ONENAND_REG_INTERRUPT);
198 if ((intr & ONENAND_INT_MASTER) == 0)
199 wait_warn("timeout", state, ctrl, intr);
200 }
201 }
202 } else {
203 int retry_cnt = 0;
204
205 /* Turn interrupts off */
206 syscfg = read_reg(c, ONENAND_REG_SYS_CFG1);
207 syscfg &= ~ONENAND_SYS_CFG1_IOBE;
208 write_reg(c, syscfg, ONENAND_REG_SYS_CFG1);
209
210 timeout = jiffies + msecs_to_jiffies(20);
211 while (1) {
212 if (time_before(jiffies, timeout)) {
213 intr = read_reg(c, ONENAND_REG_INTERRUPT);
214 if (intr & ONENAND_INT_MASTER)
215 break;
216 } else {
217 /* Timeout after 20ms */
218 ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
219 if (ctrl & ONENAND_CTRL_ONGO) {
220 /*
221 * The operation seems to be still going
222 * so give it some more time.
223 */
224 retry_cnt += 1;
225 if (retry_cnt < 3) {
226 timeout = jiffies +
227 msecs_to_jiffies(20);
228 continue;
229 }
230 }
231 break;
232 }
233 }
234 }
235
236 intr = read_reg(c, ONENAND_REG_INTERRUPT);
237 ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
238
239 if (intr & ONENAND_INT_READ) {
240 int ecc = read_reg(c, ONENAND_REG_ECC_STATUS);
241
242 if (ecc) {
243 unsigned int addr1, addr8;
244
245 addr1 = read_reg(c, ONENAND_REG_START_ADDRESS1);
246 addr8 = read_reg(c, ONENAND_REG_START_ADDRESS8);
247 if (ecc & ONENAND_ECC_2BIT_ALL) {
248 printk(KERN_ERR "onenand_wait: ECC error = "
249 "0x%04x, addr1 %#x, addr8 %#x\n",
250 ecc, addr1, addr8);
251 mtd->ecc_stats.failed++;
252 return -EBADMSG;
253 } else if (ecc & ONENAND_ECC_1BIT_ALL) {
254 printk(KERN_NOTICE "onenand_wait: correctable "
255 "ECC error = 0x%04x, addr1 %#x, "
256 "addr8 %#x\n", ecc, addr1, addr8);
257 mtd->ecc_stats.corrected++;
258 }
259 }
260 } else if (state == FL_READING) {
261 wait_err("timeout", state, ctrl, intr);
262 return -EIO;
263 }
264
265 if (ctrl & ONENAND_CTRL_ERROR) {
266 wait_err("controller error", state, ctrl, intr);
267 if (ctrl & ONENAND_CTRL_LOCK)
268 printk(KERN_ERR "onenand_wait: "
269 "Device is write protected!!!\n");
270 return -EIO;
271 }
272
273 ctrl_mask = 0xFE9F;
274 if (this->ongoing)
275 ctrl_mask &= ~0x8000;
276
277 if (ctrl & ctrl_mask)
278 wait_warn("unexpected controller status", state, ctrl, intr);
279
280 return 0;
281}
282
283static inline int omap2_onenand_bufferram_offset(struct mtd_info *mtd, int area)
284{
285 struct onenand_chip *this = mtd->priv;
286
287 if (ONENAND_CURRENT_BUFFERRAM(this)) {
288 if (area == ONENAND_DATARAM)
289 return this->writesize;
290 if (area == ONENAND_SPARERAM)
291 return mtd->oobsize;
292 }
293
294 return 0;
295}
296
297#if defined(CONFIG_ARCH_OMAP3) || defined(MULTI_OMAP2)
298
299static int omap3_onenand_read_bufferram(struct mtd_info *mtd, int area,
300 unsigned char *buffer, int offset,
301 size_t count)
302{
303 struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
304 struct onenand_chip *this = mtd->priv;
305 dma_addr_t dma_src, dma_dst;
306 int bram_offset;
307 unsigned long timeout;
308 void *buf = (void *)buffer;
309 size_t xtra;
310 volatile unsigned *done;
311
312 bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset;
313 if (bram_offset & 3 || (size_t)buf & 3 || count < 384)
314 goto out_copy;
315
316 /* panic_write() may be in an interrupt context */
317 if (in_interrupt() || oops_in_progress)
318 goto out_copy;
319
320 if (buf >= high_memory) {
321 struct page *p1;
322
323 if (((size_t)buf & PAGE_MASK) !=
324 ((size_t)(buf + count - 1) & PAGE_MASK))
325 goto out_copy;
326 p1 = vmalloc_to_page(buf);
327 if (!p1)
328 goto out_copy;
329 buf = page_address(p1) + ((size_t)buf & ~PAGE_MASK);
330 }
331
332 xtra = count & 3;
333 if (xtra) {
334 count -= xtra;
335 memcpy(buf + count, this->base + bram_offset + count, xtra);
336 }
337
338 dma_src = c->phys_base + bram_offset;
339 dma_dst = dma_map_single(&c->pdev->dev, buf, count, DMA_FROM_DEVICE);
340 if (dma_mapping_error(&c->pdev->dev, dma_dst)) {
341 dev_err(&c->pdev->dev,
342 "Couldn't DMA map a %d byte buffer\n",
343 count);
344 goto out_copy;
345 }
346
347 omap_set_dma_transfer_params(c->dma_channel, OMAP_DMA_DATA_TYPE_S32,
348 count >> 2, 1, 0, 0, 0);
349 omap_set_dma_src_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
350 dma_src, 0, 0);
351 omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
352 dma_dst, 0, 0);
353
354 INIT_COMPLETION(c->dma_done);
355 omap_start_dma(c->dma_channel);
356
357 timeout = jiffies + msecs_to_jiffies(20);
358 done = &c->dma_done.done;
359 while (time_before(jiffies, timeout))
360 if (*done)
361 break;
362
363 dma_unmap_single(&c->pdev->dev, dma_dst, count, DMA_FROM_DEVICE);
364
365 if (!*done) {
366 dev_err(&c->pdev->dev, "timeout waiting for DMA\n");
367 goto out_copy;
368 }
369
370 return 0;
371
372out_copy:
373 memcpy(buf, this->base + bram_offset, count);
374 return 0;
375}
376
377static int omap3_onenand_write_bufferram(struct mtd_info *mtd, int area,
378 const unsigned char *buffer,
379 int offset, size_t count)
380{
381 struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
382 struct onenand_chip *this = mtd->priv;
383 dma_addr_t dma_src, dma_dst;
384 int bram_offset;
385 unsigned long timeout;
386 void *buf = (void *)buffer;
387 volatile unsigned *done;
388
389 bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset;
390 if (bram_offset & 3 || (size_t)buf & 3 || count < 384)
391 goto out_copy;
392
393 /* panic_write() may be in an interrupt context */
394 if (in_interrupt() || oops_in_progress)
395 goto out_copy;
396
397 if (buf >= high_memory) {
398 struct page *p1;
399
400 if (((size_t)buf & PAGE_MASK) !=
401 ((size_t)(buf + count - 1) & PAGE_MASK))
402 goto out_copy;
403 p1 = vmalloc_to_page(buf);
404 if (!p1)
405 goto out_copy;
406 buf = page_address(p1) + ((size_t)buf & ~PAGE_MASK);
407 }
408
409 dma_src = dma_map_single(&c->pdev->dev, buf, count, DMA_TO_DEVICE);
410 dma_dst = c->phys_base + bram_offset;
411 if (dma_mapping_error(&c->pdev->dev, dma_src)) {
412 dev_err(&c->pdev->dev,
413 "Couldn't DMA map a %d byte buffer\n",
414 count);
415 return -1;
416 }
417
418 omap_set_dma_transfer_params(c->dma_channel, OMAP_DMA_DATA_TYPE_S32,
419 count >> 2, 1, 0, 0, 0);
420 omap_set_dma_src_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
421 dma_src, 0, 0);
422 omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
423 dma_dst, 0, 0);
424
425 INIT_COMPLETION(c->dma_done);
426 omap_start_dma(c->dma_channel);
427
428 timeout = jiffies + msecs_to_jiffies(20);
429 done = &c->dma_done.done;
430 while (time_before(jiffies, timeout))
431 if (*done)
432 break;
433
434 dma_unmap_single(&c->pdev->dev, dma_src, count, DMA_TO_DEVICE);
435
436 if (!*done) {
437 dev_err(&c->pdev->dev, "timeout waiting for DMA\n");
438 goto out_copy;
439 }
440
441 return 0;
442
443out_copy:
444 memcpy(this->base + bram_offset, buf, count);
445 return 0;
446}
447
448#else
449
450int omap3_onenand_read_bufferram(struct mtd_info *mtd, int area,
451 unsigned char *buffer, int offset,
452 size_t count);
453
454int omap3_onenand_write_bufferram(struct mtd_info *mtd, int area,
455 const unsigned char *buffer,
456 int offset, size_t count);
457
458#endif
459
460#if defined(CONFIG_ARCH_OMAP2) || defined(MULTI_OMAP2)
461
462static int omap2_onenand_read_bufferram(struct mtd_info *mtd, int area,
463 unsigned char *buffer, int offset,
464 size_t count)
465{
466 struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
467 struct onenand_chip *this = mtd->priv;
468 dma_addr_t dma_src, dma_dst;
469 int bram_offset;
470
471 bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset;
472 /* DMA is not used. Revisit PM requirements before enabling it. */
473 if (1 || (c->dma_channel < 0) ||
474 ((void *) buffer >= (void *) high_memory) || (bram_offset & 3) ||
475 (((unsigned int) buffer) & 3) || (count < 1024) || (count & 3)) {
476 memcpy(buffer, (__force void *)(this->base + bram_offset),
477 count);
478 return 0;
479 }
480
481 dma_src = c->phys_base + bram_offset;
482 dma_dst = dma_map_single(&c->pdev->dev, buffer, count,
483 DMA_FROM_DEVICE);
484 if (dma_mapping_error(&c->pdev->dev, dma_dst)) {
485 dev_err(&c->pdev->dev,
486 "Couldn't DMA map a %d byte buffer\n",
487 count);
488 return -1;
489 }
490
491 omap_set_dma_transfer_params(c->dma_channel, OMAP_DMA_DATA_TYPE_S32,
492 count / 4, 1, 0, 0, 0);
493 omap_set_dma_src_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
494 dma_src, 0, 0);
495 omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
496 dma_dst, 0, 0);
497
498 INIT_COMPLETION(c->dma_done);
499 omap_start_dma(c->dma_channel);
500 wait_for_completion(&c->dma_done);
501
502 dma_unmap_single(&c->pdev->dev, dma_dst, count, DMA_FROM_DEVICE);
503
504 return 0;
505}
506
507static int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area,
508 const unsigned char *buffer,
509 int offset, size_t count)
510{
511 struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
512 struct onenand_chip *this = mtd->priv;
513 dma_addr_t dma_src, dma_dst;
514 int bram_offset;
515
516 bram_offset = omap2_onenand_bufferram_offset(mtd, area) + area + offset;
517 /* DMA is not used. Revisit PM requirements before enabling it. */
518 if (1 || (c->dma_channel < 0) ||
519 ((void *) buffer >= (void *) high_memory) || (bram_offset & 3) ||
520 (((unsigned int) buffer) & 3) || (count < 1024) || (count & 3)) {
521 memcpy((__force void *)(this->base + bram_offset), buffer,
522 count);
523 return 0;
524 }
525
526 dma_src = dma_map_single(&c->pdev->dev, (void *) buffer, count,
527 DMA_TO_DEVICE);
528 dma_dst = c->phys_base + bram_offset;
529 if (dma_mapping_error(&c->pdev->dev, dma_src)) {
530 dev_err(&c->pdev->dev,
531 "Couldn't DMA map a %d byte buffer\n",
532 count);
533 return -1;
534 }
535
536 omap_set_dma_transfer_params(c->dma_channel, OMAP_DMA_DATA_TYPE_S16,
537 count / 2, 1, 0, 0, 0);
538 omap_set_dma_src_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
539 dma_src, 0, 0);
540 omap_set_dma_dest_params(c->dma_channel, 0, OMAP_DMA_AMODE_POST_INC,
541 dma_dst, 0, 0);
542
543 INIT_COMPLETION(c->dma_done);
544 omap_start_dma(c->dma_channel);
545 wait_for_completion(&c->dma_done);
546
547 dma_unmap_single(&c->pdev->dev, dma_src, count, DMA_TO_DEVICE);
548
549 return 0;
550}
551
552#else
553
554int omap2_onenand_read_bufferram(struct mtd_info *mtd, int area,
555 unsigned char *buffer, int offset,
556 size_t count);
557
558int omap2_onenand_write_bufferram(struct mtd_info *mtd, int area,
559 const unsigned char *buffer,
560 int offset, size_t count);
561
562#endif
563
564static struct platform_driver omap2_onenand_driver;
565
566static int __adjust_timing(struct device *dev, void *data)
567{
568 int ret = 0;
569 struct omap2_onenand *c;
570
571 c = dev_get_drvdata(dev);
572
573 BUG_ON(c->setup == NULL);
574
575 /* DMA is not in use so this is all that is needed */
576 /* Revisit for OMAP3! */
577 ret = c->setup(c->onenand.base, &c->freq);
578
579 return ret;
580}
581
582int omap2_onenand_rephase(void)
583{
584 return driver_for_each_device(&omap2_onenand_driver.driver, NULL,
585 NULL, __adjust_timing);
586}
587
588static void omap2_onenand_shutdown(struct platform_device *pdev)
589{
590 struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
591
592 /* With certain content in the buffer RAM, the OMAP boot ROM code
593 * can recognize the flash chip incorrectly. Zero it out before
594 * soft reset.
595 */
596 memset((__force void *)c->onenand.base, 0, ONENAND_BUFRAM_SIZE);
597}
598
599static int omap2_onenand_enable(struct mtd_info *mtd)
600{
601 int ret;
602 struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
603
604 ret = regulator_enable(c->regulator);
605 if (ret != 0)
606 dev_err(&c->pdev->dev, "can't enable regulator\n");
607
608 return ret;
609}
610
611static int omap2_onenand_disable(struct mtd_info *mtd)
612{
613 int ret;
614 struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
615
616 ret = regulator_disable(c->regulator);
617 if (ret != 0)
618 dev_err(&c->pdev->dev, "can't disable regulator\n");
619
620 return ret;
621}
622
623static int __devinit omap2_onenand_probe(struct platform_device *pdev)
624{
625 struct omap_onenand_platform_data *pdata;
626 struct omap2_onenand *c;
627 struct onenand_chip *this;
628 int r;
629
630 pdata = pdev->dev.platform_data;
631 if (pdata == NULL) {
632 dev_err(&pdev->dev, "platform data missing\n");
633 return -ENODEV;
634 }
635
636 c = kzalloc(sizeof(struct omap2_onenand), GFP_KERNEL);
637 if (!c)
638 return -ENOMEM;
639
640 init_completion(&c->irq_done);
641 init_completion(&c->dma_done);
642 c->gpmc_cs = pdata->cs;
643 c->gpio_irq = pdata->gpio_irq;
644 c->dma_channel = pdata->dma_channel;
645 if (c->dma_channel < 0) {
646 /* if -1, don't use DMA */
647 c->gpio_irq = 0;
648 }
649
650 r = gpmc_cs_request(c->gpmc_cs, ONENAND_IO_SIZE, &c->phys_base);
651 if (r < 0) {
652 dev_err(&pdev->dev, "Cannot request GPMC CS\n");
653 goto err_kfree;
654 }
655
656 if (request_mem_region(c->phys_base, ONENAND_IO_SIZE,
657 pdev->dev.driver->name) == NULL) {
658 dev_err(&pdev->dev, "Cannot reserve memory region at 0x%08lx, "
659 "size: 0x%x\n", c->phys_base, ONENAND_IO_SIZE);
660 r = -EBUSY;
661 goto err_free_cs;
662 }
663 c->onenand.base = ioremap(c->phys_base, ONENAND_IO_SIZE);
664 if (c->onenand.base == NULL) {
665 r = -ENOMEM;
666 goto err_release_mem_region;
667 }
668
669 if (pdata->onenand_setup != NULL) {
670 r = pdata->onenand_setup(c->onenand.base, &c->freq);
671 if (r < 0) {
672 dev_err(&pdev->dev, "Onenand platform setup failed: "
673 "%d\n", r);
674 goto err_iounmap;
675 }
676 c->setup = pdata->onenand_setup;
677 }
678
679 if (c->gpio_irq) {
680 if ((r = gpio_request(c->gpio_irq, "OneNAND irq")) < 0) {
681 dev_err(&pdev->dev, "Failed to request GPIO%d for "
682 "OneNAND\n", c->gpio_irq);
683 goto err_iounmap;
684 }
685 gpio_direction_input(c->gpio_irq);
686
687 if ((r = request_irq(gpio_to_irq(c->gpio_irq),
688 omap2_onenand_interrupt, IRQF_TRIGGER_RISING,
689 pdev->dev.driver->name, c)) < 0)
690 goto err_release_gpio;
691 }
692
693 if (c->dma_channel >= 0) {
694 r = omap_request_dma(0, pdev->dev.driver->name,
695 omap2_onenand_dma_cb, (void *) c,
696 &c->dma_channel);
697 if (r == 0) {
698 omap_set_dma_write_mode(c->dma_channel,
699 OMAP_DMA_WRITE_NON_POSTED);
700 omap_set_dma_src_data_pack(c->dma_channel, 1);
701 omap_set_dma_src_burst_mode(c->dma_channel,
702 OMAP_DMA_DATA_BURST_8);
703 omap_set_dma_dest_data_pack(c->dma_channel, 1);
704 omap_set_dma_dest_burst_mode(c->dma_channel,
705 OMAP_DMA_DATA_BURST_8);
706 } else {
707 dev_info(&pdev->dev,
708 "failed to allocate DMA for OneNAND, "
709 "using PIO instead\n");
710 c->dma_channel = -1;
711 }
712 }
713
714 dev_info(&pdev->dev, "initializing on CS%d, phys base 0x%08lx, virtual "
715 "base %p, freq %d MHz\n", c->gpmc_cs, c->phys_base,
716 c->onenand.base, c->freq);
717
718 c->pdev = pdev;
719 c->mtd.name = dev_name(&pdev->dev);
720 c->mtd.priv = &c->onenand;
721 c->mtd.owner = THIS_MODULE;
722
723 c->mtd.dev.parent = &pdev->dev;
724
725 this = &c->onenand;
726 if (c->dma_channel >= 0) {
727 this->wait = omap2_onenand_wait;
728 if (cpu_is_omap34xx()) {
729 this->read_bufferram = omap3_onenand_read_bufferram;
730 this->write_bufferram = omap3_onenand_write_bufferram;
731 } else {
732 this->read_bufferram = omap2_onenand_read_bufferram;
733 this->write_bufferram = omap2_onenand_write_bufferram;
734 }
735 }
736
737 if (pdata->regulator_can_sleep) {
738 c->regulator = regulator_get(&pdev->dev, "vonenand");
739 if (IS_ERR(c->regulator)) {
740 dev_err(&pdev->dev, "Failed to get regulator\n");
741 r = PTR_ERR(c->regulator);
742 goto err_release_dma;
743 }
744 c->onenand.enable = omap2_onenand_enable;
745 c->onenand.disable = omap2_onenand_disable;
746 }
747
748 if (pdata->skip_initial_unlocking)
749 this->options |= ONENAND_SKIP_INITIAL_UNLOCKING;
750
751 if ((r = onenand_scan(&c->mtd, 1)) < 0)
752 goto err_release_regulator;
753
754 r = mtd_device_parse_register(&c->mtd, NULL, NULL,
755 pdata ? pdata->parts : NULL,
756 pdata ? pdata->nr_parts : 0);
757 if (r)
758 goto err_release_onenand;
759
760 platform_set_drvdata(pdev, c);
761
762 return 0;
763
764err_release_onenand:
765 onenand_release(&c->mtd);
766err_release_regulator:
767 regulator_put(c->regulator);
768err_release_dma:
769 if (c->dma_channel != -1)
770 omap_free_dma(c->dma_channel);
771 if (c->gpio_irq)
772 free_irq(gpio_to_irq(c->gpio_irq), c);
773err_release_gpio:
774 if (c->gpio_irq)
775 gpio_free(c->gpio_irq);
776err_iounmap:
777 iounmap(c->onenand.base);
778err_release_mem_region:
779 release_mem_region(c->phys_base, ONENAND_IO_SIZE);
780err_free_cs:
781 gpmc_cs_free(c->gpmc_cs);
782err_kfree:
783 kfree(c);
784
785 return r;
786}
787
788static int __devexit omap2_onenand_remove(struct platform_device *pdev)
789{
790 struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
791
792 onenand_release(&c->mtd);
793 regulator_put(c->regulator);
794 if (c->dma_channel != -1)
795 omap_free_dma(c->dma_channel);
796 omap2_onenand_shutdown(pdev);
797 platform_set_drvdata(pdev, NULL);
798 if (c->gpio_irq) {
799 free_irq(gpio_to_irq(c->gpio_irq), c);
800 gpio_free(c->gpio_irq);
801 }
802 iounmap(c->onenand.base);
803 release_mem_region(c->phys_base, ONENAND_IO_SIZE);
804 gpmc_cs_free(c->gpmc_cs);
805 kfree(c);
806
807 return 0;
808}
809
810static struct platform_driver omap2_onenand_driver = {
811 .probe = omap2_onenand_probe,
812 .remove = __devexit_p(omap2_onenand_remove),
813 .shutdown = omap2_onenand_shutdown,
814 .driver = {
815 .name = DRIVER_NAME,
816 .owner = THIS_MODULE,
817 },
818};
819
820static int __init omap2_onenand_init(void)
821{
822 printk(KERN_INFO "OneNAND driver initializing\n");
823 return platform_driver_register(&omap2_onenand_driver);
824}
825
826static void __exit omap2_onenand_exit(void)
827{
828 platform_driver_unregister(&omap2_onenand_driver);
829}
830
831module_init(omap2_onenand_init);
832module_exit(omap2_onenand_exit);
833
834MODULE_ALIAS("platform:" DRIVER_NAME);
835MODULE_LICENSE("GPL");
836MODULE_AUTHOR("Jarkko Lavinen <jarkko.lavinen@nokia.com>");
837MODULE_DESCRIPTION("Glue layer for OneNAND flash on OMAP2 / OMAP3");