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V4L/DVB (10081): pxa-camera: call try_fmt() camera device method with correct pixel...
[deliverable/linux.git] / drivers / media / video / sh_mobile_ceu_camera.c
CommitLineData
0d3244d6
MD		 1/*
2 * V4L2 Driver for SuperH Mobile CEU interface
3 *
4 * Copyright (C) 2008 Magnus Damm
5 *
6 * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
7 *
8 * Copyright (C) 2006, Sascha Hauer, Pengutronix
9 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 */
16
17#include <linux/init.h>
18#include <linux/module.h>
19#include <linux/io.h>
20#include <linux/delay.h>
21#include <linux/dma-mapping.h>
22#include <linux/errno.h>
23#include <linux/fs.h>
24#include <linux/interrupt.h>
25#include <linux/kernel.h>
26#include <linux/mm.h>
27#include <linux/moduleparam.h>
28#include <linux/time.h>
29#include <linux/version.h>
30#include <linux/device.h>
31#include <linux/platform_device.h>
32#include <linux/mutex.h>
33#include <linux/videodev2.h>
a42b6dd6 34#include <linux/clk.h>
0d3244d6
MD		 35
36#include <media/v4l2-common.h>
37#include <media/v4l2-dev.h>
38#include <media/soc_camera.h>
39#include <media/sh_mobile_ceu.h>
40#include <media/videobuf-dma-contig.h>
41
42/* register offsets for sh7722 / sh7723 */
43
dd54203b
MD		 44#define CAPSR 0x00 /* Capture start register */
45#define CAPCR 0x04 /* Capture control register */
46#define CAMCR 0x08 /* Capture interface control register */
47#define CMCYR 0x0c /* Capture interface cycle register */
48#define CAMOR 0x10 /* Capture interface offset register */
49#define CAPWR 0x14 /* Capture interface width register */
50#define CAIFR 0x18 /* Capture interface input format register */
51#define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
52#define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
53#define CRCNTR 0x28 /* CEU register control register */
54#define CRCMPR 0x2c /* CEU register forcible control register */
55#define CFLCR 0x30 /* Capture filter control register */
56#define CFSZR 0x34 /* Capture filter size clip register */
57#define CDWDR 0x38 /* Capture destination width register */
58#define CDAYR 0x3c /* Capture data address Y register */
59#define CDACR 0x40 /* Capture data address C register */
60#define CDBYR 0x44 /* Capture data bottom-field address Y register */
61#define CDBCR 0x48 /* Capture data bottom-field address C register */
62#define CBDSR 0x4c /* Capture bundle destination size register */
63#define CFWCR 0x5c /* Firewall operation control register */
64#define CLFCR 0x60 /* Capture low-pass filter control register */
65#define CDOCR 0x64 /* Capture data output control register */
66#define CDDCR 0x68 /* Capture data complexity level register */
67#define CDDAR 0x6c /* Capture data complexity level address register */
68#define CEIER 0x70 /* Capture event interrupt enable register */
69#define CETCR 0x74 /* Capture event flag clear register */
70#define CSTSR 0x7c /* Capture status register */
71#define CSRTR 0x80 /* Capture software reset register */
72#define CDSSR 0x84 /* Capture data size register */
73#define CDAYR2 0x90 /* Capture data address Y register 2 */
74#define CDACR2 0x94 /* Capture data address C register 2 */
75#define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
76#define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
0d3244d6
MD		 77
78static DEFINE_MUTEX(camera_lock);
79
80/* per video frame buffer */
81struct sh_mobile_ceu_buffer {
82 struct videobuf_buffer vb; /* v4l buffer must be first */
83 const struct soc_camera_data_format *fmt;
84};
85
86struct sh_mobile_ceu_dev {
87 struct device *dev;
88 struct soc_camera_host ici;
89 struct soc_camera_device *icd;
90
91 unsigned int irq;
92 void __iomem *base;
a42b6dd6 93 struct clk *clk;
0d3244d6
MD		 94 unsigned long video_limit;
95
c60f2b5c 96 /* lock used to protect videobuf */
0d3244d6
MD		 97 spinlock_t lock;
98 struct list_head capture;
99 struct videobuf_buffer *active;
100
101 struct sh_mobile_ceu_info *pdata;
102};
103
104static void ceu_write(struct sh_mobile_ceu_dev *priv,
105 unsigned long reg_offs, unsigned long data)
106{
107 iowrite32(data, priv->base + reg_offs);
108}
109
110static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv,
111 unsigned long reg_offs)
112{
113 return ioread32(priv->base + reg_offs);
114}
115
116/*
117 * Videobuf operations
118 */
119static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
120 unsigned int *count,
121 unsigned int *size)
122{
123 struct soc_camera_device *icd = vq->priv_data;
124 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
125 struct sh_mobile_ceu_dev *pcdev = ici->priv;
126 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
127
128 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
129
130 if (0 == *count)
131 *count = 2;
132
133 if (pcdev->video_limit) {
134 while (*size * *count > pcdev->video_limit)
135 (*count)--;
136 }
137
138 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
139
140 return 0;
141}
142
143static void free_buffer(struct videobuf_queue *vq,
144 struct sh_mobile_ceu_buffer *buf)
145{
146 struct soc_camera_device *icd = vq->priv_data;
147
86751b01 148 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 149 &buf->vb, buf->vb.baddr, buf->vb.bsize);
150
151 if (in_interrupt())
152 BUG();
153
154 videobuf_dma_contig_free(vq, &buf->vb);
155 dev_dbg(&icd->dev, "%s freed\n", __func__);
156 buf->vb.state = VIDEOBUF_NEEDS_INIT;
157}
158
159static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
160{
161 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1);
162 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313);
163 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1);
164
165 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000);
166
167 ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
168
169 if (pcdev->active) {
51354cc3 170 pcdev->active->state = VIDEOBUF_ACTIVE;
0d3244d6
MD		 171 ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active));
172 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
173 }
174}
175
176static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
177 struct videobuf_buffer *vb,
178 enum v4l2_field field)
179{
180 struct soc_camera_device *icd = vq->priv_data;
181 struct sh_mobile_ceu_buffer *buf;
182 int ret;
183
184 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
185
86751b01 186 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 187 vb, vb->baddr, vb->bsize);
188
189 /* Added list head initialization on alloc */
190 WARN_ON(!list_empty(&vb->queue));
191
192#ifdef DEBUG
193 /* This can be useful if you want to see if we actually fill
194 * the buffer with something */
195 memset((void *)vb->baddr, 0xaa, vb->bsize);
196#endif
197
198 BUG_ON(NULL == icd->current_fmt);
199
200 if (buf->fmt != icd->current_fmt ||
201 vb->width != icd->width ||
202 vb->height != icd->height ||
203 vb->field != field) {
204 buf->fmt = icd->current_fmt;
205 vb->width = icd->width;
206 vb->height = icd->height;
207 vb->field = field;
208 vb->state = VIDEOBUF_NEEDS_INIT;
209 }
210
211 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
212 if (0 != vb->baddr && vb->bsize < vb->size) {
213 ret = -EINVAL;
214 goto out;
215 }
216
217 if (vb->state == VIDEOBUF_NEEDS_INIT) {
218 ret = videobuf_iolock(vq, vb, NULL);
219 if (ret)
220 goto fail;
221 vb->state = VIDEOBUF_PREPARED;
222 }
223
224 return 0;
225fail:
226 free_buffer(vq, buf);
227out:
228 return ret;
229}
230
231static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
232 struct videobuf_buffer *vb)
233{
234 struct soc_camera_device *icd = vq->priv_data;
235 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
236 struct sh_mobile_ceu_dev *pcdev = ici->priv;
237 unsigned long flags;
238
86751b01 239 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 240 vb, vb->baddr, vb->bsize);
241
51354cc3 242 vb->state = VIDEOBUF_QUEUED;
0d3244d6
MD		 243 spin_lock_irqsave(&pcdev->lock, flags);
244 list_add_tail(&vb->queue, &pcdev->capture);
245
246 if (!pcdev->active) {
247 pcdev->active = vb;
248 sh_mobile_ceu_capture(pcdev);
249 }
250
251 spin_unlock_irqrestore(&pcdev->lock, flags);
252}
253
254static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
255 struct videobuf_buffer *vb)
256{
257 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
258}
259
260static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
261 .buf_setup = sh_mobile_ceu_videobuf_setup,
262 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
263 .buf_queue = sh_mobile_ceu_videobuf_queue,
264 .buf_release = sh_mobile_ceu_videobuf_release,
265};
266
267static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
268{
269 struct sh_mobile_ceu_dev *pcdev = data;
270 struct videobuf_buffer *vb;
271 unsigned long flags;
272
273 spin_lock_irqsave(&pcdev->lock, flags);
274
275 vb = pcdev->active;
276 list_del_init(&vb->queue);
277
278 if (!list_empty(&pcdev->capture))
279 pcdev->active = list_entry(pcdev->capture.next,
280 struct videobuf_buffer, queue);
281 else
282 pcdev->active = NULL;
283
284 sh_mobile_ceu_capture(pcdev);
285
286 vb->state = VIDEOBUF_DONE;
287 do_gettimeofday(&vb->ts);
288 vb->field_count++;
289 wake_up(&vb->done);
290 spin_unlock_irqrestore(&pcdev->lock, flags);
291
292 return IRQ_HANDLED;
293}
294
295static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
296{
297 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
298 struct sh_mobile_ceu_dev *pcdev = ici->priv;
299 int ret = -EBUSY;
300
301 mutex_lock(&camera_lock);
302
303 if (pcdev->icd)
304 goto err;
305
306 dev_info(&icd->dev,
307 "SuperH Mobile CEU driver attached to camera %d\n",
308 icd->devnum);
309
0d3244d6
MD		 310 ret = icd->ops->init(icd);
311 if (ret)
312 goto err;
313
a42b6dd6
MD		 314 clk_enable(pcdev->clk);
315
0d3244d6
MD		 316 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
317 while (ceu_read(pcdev, CSTSR) & 1)
318 msleep(1);
319
320 pcdev->icd = icd;
321err:
322 mutex_unlock(&camera_lock);
323
324 return ret;
325}
326
327static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
328{
329 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
330 struct sh_mobile_ceu_dev *pcdev = ici->priv;
51354cc3 331 unsigned long flags;
0d3244d6
MD		 332
333 BUG_ON(icd != pcdev->icd);
334
335 /* disable capture, disable interrupts */
336 ceu_write(pcdev, CEIER, 0);
337 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
51354cc3
MD		 338
339 /* make sure active buffer is canceled */
340 spin_lock_irqsave(&pcdev->lock, flags);
341 if (pcdev->active) {
342 list_del(&pcdev->active->queue);
343 pcdev->active->state = VIDEOBUF_ERROR;
344 wake_up_all(&pcdev->active->done);
345 pcdev->active = NULL;
346 }
347 spin_unlock_irqrestore(&pcdev->lock, flags);
348
a42b6dd6
MD		 349 clk_disable(pcdev->clk);
350
0d3244d6 351 icd->ops->release(icd);
0d3244d6
MD		 352
353 dev_info(&icd->dev,
354 "SuperH Mobile CEU driver detached from camera %d\n",
355 icd->devnum);
356
357 pcdev->icd = NULL;
358}
359
360static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
361 __u32 pixfmt)
362{
363 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
364 struct sh_mobile_ceu_dev *pcdev = ici->priv;
365 int ret, buswidth, width, cfszr_width, cdwdr_width;
366 unsigned long camera_flags, common_flags, value;
367
368 camera_flags = icd->ops->query_bus_param(icd);
369 common_flags = soc_camera_bus_param_compatible(camera_flags,
370 pcdev->pdata->flags);
371 if (!common_flags)
372 return -EINVAL;
373
374 ret = icd->ops->set_bus_param(icd, common_flags);
375 if (ret < 0)
376 return ret;
377
378 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
379 case SOCAM_DATAWIDTH_8:
380 buswidth = 8;
381 break;
382 case SOCAM_DATAWIDTH_16:
383 buswidth = 16;
384 break;
385 default:
386 return -EINVAL;
387 }
388
389 ceu_write(pcdev, CRCNTR, 0);
390 ceu_write(pcdev, CRCMPR, 0);
391
392 value = 0x00000010;
393 value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0;
394 value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0;
395 value |= (buswidth == 16) ? (1 << 12) : 0;
396 ceu_write(pcdev, CAMCR, value);
397
398 ceu_write(pcdev, CAPCR, 0x00300000);
399 ceu_write(pcdev, CAIFR, 0);
400
401 mdelay(1);
402
403 width = icd->width * (icd->current_fmt->depth / 8);
404 width = (buswidth == 16) ? width / 2 : width;
405 cfszr_width = (buswidth == 8) ? width / 2 : width;
406 cdwdr_width = (buswidth == 16) ? width * 2 : width;
407
408 ceu_write(pcdev, CAMOR, 0);
409 ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
410 ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */
411 ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
412 ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */
dd54203b
MD		 413
414 /* A few words about byte order (observed in Big Endian mode)
415 *
416 * In data fetch mode bytes are received in chunks of 8 bytes.
417 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
418 *
419 * The data is however by default written to memory in reverse order:
420 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
421 *
422 * The lowest three bits of CDOCR allows us to do swapping,
2c0a072e
MD		 423 * using 7 we swap the data bytes to match the incoming order:
424 * D0, D1, D2, D3, D4, D5, D6, D7
dd54203b 425 */
2c0a072e 426 ceu_write(pcdev, CDOCR, 0x00000017);
0d3244d6
MD		 427
428 ceu_write(pcdev, CDWDR, cdwdr_width);
429 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
430
431 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
432 /* in data fetch mode: no need for CDACR, CDBYR, CDBCR */
433
434 return 0;
435}
436
9414de39 437static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
0d3244d6
MD		 438{
439 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
440 struct sh_mobile_ceu_dev *pcdev = ici->priv;
441 unsigned long camera_flags, common_flags;
442
443 camera_flags = icd->ops->query_bus_param(icd);
444 common_flags = soc_camera_bus_param_compatible(camera_flags,
445 pcdev->pdata->flags);
446 if (!common_flags)
447 return -EINVAL;
448
449 return 0;
450}
451
9414de39
MD		 452static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
453 struct soc_camera_format_xlate *xlate)
454{
455 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
456 int ret;
457 int formats = 0;
458
459 ret = sh_mobile_ceu_try_bus_param(icd);
460 if (ret < 0)
461 return 0;
462
463 switch (icd->formats[idx].fourcc) {
464 default:
465 /* Generic pass-through */
466 formats++;
467 if (xlate) {
468 xlate->host_fmt = icd->formats + idx;
469 xlate->cam_fmt = icd->formats + idx;
470 xlate->buswidth = icd->formats[idx].depth;
471 xlate++;
472 dev_dbg(&ici->dev,
473 "Providing format %s in pass-through mode\n",
474 icd->formats[idx].name);
475 }
476 }
477
478 return formats;
479}
480
d8fac217
GL		 481static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
482 __u32 pixfmt, struct v4l2_rect *rect)
0d3244d6 483{
9414de39
MD		 484 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
485 const struct soc_camera_format_xlate *xlate;
25c4d74e
GL		 486 int ret;
487
9414de39
MD		 488 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
489 if (!xlate) {
490 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
491 return -EINVAL;
25c4d74e
GL		 492 }
493
9414de39
MD		 494 switch (pixfmt) {
495 case 0: /* Only geometry change */
496 ret = icd->ops->set_fmt(icd, pixfmt, rect);
497 break;
498 default:
499 ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect);
500 }
501
502 if (pixfmt && !ret) {
503 icd->buswidth = xlate->buswidth;
504 icd->current_fmt = xlate->host_fmt;
505 }
25c4d74e
GL		 506
507 return ret;
0d3244d6
MD		 508}
509
d8fac217
GL		 510static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
511 struct v4l2_format *f)
0d3244d6 512{
9414de39
MD		 513 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
514 const struct soc_camera_format_xlate *xlate;
515 __u32 pixfmt = f->fmt.pix.pixelformat;
a2c8c68c 516
9414de39
MD		 517 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
518 if (!xlate) {
519 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
25c4d74e 520 return -EINVAL;
9414de39 521 }
25c4d74e 522
0d3244d6
MD		 523 /* FIXME: calculate using depth and bus width */
524
525 if (f->fmt.pix.height < 4)
526 f->fmt.pix.height = 4;
527 if (f->fmt.pix.height > 1920)
528 f->fmt.pix.height = 1920;
529 if (f->fmt.pix.width < 2)
530 f->fmt.pix.width = 2;
531 if (f->fmt.pix.width > 2560)
532 f->fmt.pix.width = 2560;
533 f->fmt.pix.width &= ~0x01;
534 f->fmt.pix.height &= ~0x03;
535
25c4d74e 536 f->fmt.pix.bytesperline = f->fmt.pix.width *
9414de39 537 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
25c4d74e
GL		 538 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
539
0d3244d6 540 /* limit to sensor capabilities */
d8fac217 541 return icd->ops->try_fmt(icd, f);
0d3244d6
MD		 542}
543
544static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
545 struct v4l2_requestbuffers *p)
546{
547 int i;
548
549 /* This is for locking debugging only. I removed spinlocks and now I
550 * check whether .prepare is ever called on a linked buffer, or whether
551 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
552 * it hadn't triggered */
553 for (i = 0; i < p->count; i++) {
554 struct sh_mobile_ceu_buffer *buf;
555
556 buf = container_of(icf->vb_vidq.bufs[i],
557 struct sh_mobile_ceu_buffer, vb);
558 INIT_LIST_HEAD(&buf->vb.queue);
559 }
560
561 return 0;
562}
563
564static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
565{
566 struct soc_camera_file *icf = file->private_data;
567 struct sh_mobile_ceu_buffer *buf;
568
569 buf = list_entry(icf->vb_vidq.stream.next,
570 struct sh_mobile_ceu_buffer, vb.stream);
571
572 poll_wait(file, &buf->vb.done, pt);
573
574 if (buf->vb.state == VIDEOBUF_DONE ||
575 buf->vb.state == VIDEOBUF_ERROR)
576 return POLLIN|POLLRDNORM;
577
578 return 0;
579}
580
581static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
582 struct v4l2_capability *cap)
583{
584 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
585 cap->version = KERNEL_VERSION(0, 0, 5);
586 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
587 return 0;
588}
589
590static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
591 struct soc_camera_device *icd)
592{
593 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
594 struct sh_mobile_ceu_dev *pcdev = ici->priv;
595
596 videobuf_queue_dma_contig_init(q,
597 &sh_mobile_ceu_videobuf_ops,
598 &ici->dev, &pcdev->lock,
599 V4L2_BUF_TYPE_VIDEO_CAPTURE,
600 V4L2_FIELD_NONE,
601 sizeof(struct sh_mobile_ceu_buffer),
602 icd);
603}
604
605static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
606 .owner = THIS_MODULE,
607 .add = sh_mobile_ceu_add_device,
608 .remove = sh_mobile_ceu_remove_device,
9414de39 609 .get_formats = sh_mobile_ceu_get_formats,
d8fac217
GL		 610 .set_fmt = sh_mobile_ceu_set_fmt,
611 .try_fmt = sh_mobile_ceu_try_fmt,
0d3244d6
MD		 612 .reqbufs = sh_mobile_ceu_reqbufs,
613 .poll = sh_mobile_ceu_poll,
614 .querycap = sh_mobile_ceu_querycap,
0d3244d6
MD		 615 .set_bus_param = sh_mobile_ceu_set_bus_param,
616 .init_videobuf = sh_mobile_ceu_init_videobuf,
617};
618
619static int sh_mobile_ceu_probe(struct platform_device *pdev)
620{
621 struct sh_mobile_ceu_dev *pcdev;
622 struct resource *res;
623 void __iomem *base;
a42b6dd6 624 char clk_name[8];
0d3244d6
MD		 625 unsigned int irq;
626 int err = 0;
627
628 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
629 irq = platform_get_irq(pdev, 0);
630 if (!res || !irq) {
631 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
632 err = -ENODEV;
633 goto exit;
634 }
635
636 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
637 if (!pcdev) {
638 dev_err(&pdev->dev, "Could not allocate pcdev\n");
639 err = -ENOMEM;
640 goto exit;
641 }
642
643 platform_set_drvdata(pdev, pcdev);
644 INIT_LIST_HEAD(&pcdev->capture);
645 spin_lock_init(&pcdev->lock);
646
647 pcdev->pdata = pdev->dev.platform_data;
648 if (!pcdev->pdata) {
649 err = -EINVAL;
650 dev_err(&pdev->dev, "CEU platform data not set.\n");
651 goto exit_kfree;
652 }
653
654 base = ioremap_nocache(res->start, res->end - res->start + 1);
655 if (!base) {
656 err = -ENXIO;
657 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
658 goto exit_kfree;
659 }
660
661 pcdev->irq = irq;
662 pcdev->base = base;
663 pcdev->video_limit = 0; /* only enabled if second resource exists */
664 pcdev->dev = &pdev->dev;
665
666 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
667 if (res) {
668 err = dma_declare_coherent_memory(&pdev->dev, res->start,
669 res->start,
670 (res->end - res->start) + 1,
671 DMA_MEMORY_MAP |
672 DMA_MEMORY_EXCLUSIVE);
673 if (!err) {
674 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
675 err = -ENXIO;
676 goto exit_iounmap;
677 }
678
679 pcdev->video_limit = (res->end - res->start) + 1;
680 }
681
682 /* request irq */
683 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
af128a10 684 dev_name(&pdev->dev), pcdev);
0d3244d6
MD		 685 if (err) {
686 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
687 goto exit_release_mem;
688 }
689
a42b6dd6
MD		 690 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
691 pcdev->clk = clk_get(&pdev->dev, clk_name);
692 if (IS_ERR(pcdev->clk)) {
693 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
694 err = PTR_ERR(pcdev->clk);
695 goto exit_free_irq;
696 }
697
0d3244d6
MD		 698 pcdev->ici.priv = pcdev;
699 pcdev->ici.dev.parent = &pdev->dev;
700 pcdev->ici.nr = pdev->id;
af128a10
KS		 701 pcdev->ici.drv_name = dev_name(&pdev->dev);
702 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
0d3244d6
MD		 703
704 err = soc_camera_host_register(&pcdev->ici);
705 if (err)
a42b6dd6 706 goto exit_free_clk;
0d3244d6
MD		 707
708 return 0;
709
a42b6dd6
MD		 710exit_free_clk:
711 clk_put(pcdev->clk);
0d3244d6
MD		 712exit_free_irq:
713 free_irq(pcdev->irq, pcdev);
714exit_release_mem:
715 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
716 dma_release_declared_memory(&pdev->dev);
717exit_iounmap:
718 iounmap(base);
719exit_kfree:
720 kfree(pcdev);
721exit:
722 return err;
723}
724
725static int sh_mobile_ceu_remove(struct platform_device *pdev)
726{
727 struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
728
729 soc_camera_host_unregister(&pcdev->ici);
a42b6dd6 730 clk_put(pcdev->clk);
0d3244d6
MD		 731 free_irq(pcdev->irq, pcdev);
732 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
733 dma_release_declared_memory(&pdev->dev);
734 iounmap(pcdev->base);
735 kfree(pcdev);
736 return 0;
737}
738
739static struct platform_driver sh_mobile_ceu_driver = {
740 .driver = {
741 .name = "sh_mobile_ceu",
742 },
743 .probe = sh_mobile_ceu_probe,
744 .remove = sh_mobile_ceu_remove,
745};
746
747static int __init sh_mobile_ceu_init(void)
748{
749 return platform_driver_register(&sh_mobile_ceu_driver);
750}
751
752static void __exit sh_mobile_ceu_exit(void)
753{
01c1e4ca 754 platform_driver_unregister(&sh_mobile_ceu_driver);
0d3244d6
MD		 755}
756
757module_init(sh_mobile_ceu_init);
758module_exit(sh_mobile_ceu_exit);
759
760MODULE_DESCRIPTION("SuperH Mobile CEU driver");
761MODULE_AUTHOR("Magnus Damm");
762MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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