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V4L/DVB (10085): sh_mobile_ceu: add NV16 and NV61 support
[linux-2.6/verdex.git] / drivers / media / video / sh_mobile_ceu_camera.c
blob7d1a84426413cddd5e3854d37d6b64c586ce7218
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/videodev2.h>
33 #include <linux/clk.h>
34
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-dev.h>
37 #include <media/soc_camera.h>
38 #include <media/sh_mobile_ceu.h>
39 #include <media/videobuf-dma-contig.h>
40
41 /* register offsets for sh7722 / sh7723 */
42
43 #define CAPSR 0x00 /* Capture start register */
44 #define CAPCR 0x04 /* Capture control register */
45 #define CAMCR 0x08 /* Capture interface control register */
46 #define CMCYR 0x0c /* Capture interface cycle register */
47 #define CAMOR 0x10 /* Capture interface offset register */
48 #define CAPWR 0x14 /* Capture interface width register */
49 #define CAIFR 0x18 /* Capture interface input format register */
50 #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
51 #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
52 #define CRCNTR 0x28 /* CEU register control register */
53 #define CRCMPR 0x2c /* CEU register forcible control register */
54 #define CFLCR 0x30 /* Capture filter control register */
55 #define CFSZR 0x34 /* Capture filter size clip register */
56 #define CDWDR 0x38 /* Capture destination width register */
57 #define CDAYR 0x3c /* Capture data address Y register */
58 #define CDACR 0x40 /* Capture data address C register */
59 #define CDBYR 0x44 /* Capture data bottom-field address Y register */
60 #define CDBCR 0x48 /* Capture data bottom-field address C register */
61 #define CBDSR 0x4c /* Capture bundle destination size register */
62 #define CFWCR 0x5c /* Firewall operation control register */
63 #define CLFCR 0x60 /* Capture low-pass filter control register */
64 #define CDOCR 0x64 /* Capture data output control register */
65 #define CDDCR 0x68 /* Capture data complexity level register */
66 #define CDDAR 0x6c /* Capture data complexity level address register */
67 #define CEIER 0x70 /* Capture event interrupt enable register */
68 #define CETCR 0x74 /* Capture event flag clear register */
69 #define CSTSR 0x7c /* Capture status register */
70 #define CSRTR 0x80 /* Capture software reset register */
71 #define CDSSR 0x84 /* Capture data size register */
72 #define CDAYR2 0x90 /* Capture data address Y register 2 */
73 #define CDACR2 0x94 /* Capture data address C register 2 */
74 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
75 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
76
77 /* per video frame buffer */
78 struct sh_mobile_ceu_buffer {
79 struct videobuf_buffer vb; /* v4l buffer must be first */
80 const struct soc_camera_data_format *fmt;
81 };
82
83 struct sh_mobile_ceu_dev {
84 struct device *dev;
85 struct soc_camera_host ici;
86 struct soc_camera_device *icd;
87
88 unsigned int irq;
89 void __iomem *base;
90 struct clk *clk;
91 unsigned long video_limit;
92
93 /* lock used to protect videobuf */
94 spinlock_t lock;
95 struct list_head capture;
96 struct videobuf_buffer *active;
97
98 struct sh_mobile_ceu_info *pdata;
99
100 const struct soc_camera_data_format *camera_fmt;
101 };
102
103 static void ceu_write(struct sh_mobile_ceu_dev *priv,
104 unsigned long reg_offs, unsigned long data)
105 {
106 iowrite32(data, priv->base + reg_offs);
107 }
108
109 static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv,
110 unsigned long reg_offs)
111 {
112 return ioread32(priv->base + reg_offs);
113 }
114
115 /*
116 * Videobuf operations
117 */
118 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
119 unsigned int *count,
120 unsigned int *size)
121 {
122 struct soc_camera_device *icd = vq->priv_data;
123 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
124 struct sh_mobile_ceu_dev *pcdev = ici->priv;
125 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
126
127 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
128
129 if (0 == *count)
130 *count = 2;
131
132 if (pcdev->video_limit) {
133 while (*size * *count > pcdev->video_limit)
134 (*count)--;
135 }
136
137 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
138
139 return 0;
140 }
141
142 static void free_buffer(struct videobuf_queue *vq,
143 struct sh_mobile_ceu_buffer *buf)
144 {
145 struct soc_camera_device *icd = vq->priv_data;
146
147 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
148 &buf->vb, buf->vb.baddr, buf->vb.bsize);
149
150 if (in_interrupt())
151 BUG();
152
153 videobuf_dma_contig_free(vq, &buf->vb);
154 dev_dbg(&icd->dev, "%s freed\n", __func__);
155 buf->vb.state = VIDEOBUF_NEEDS_INIT;
156 }
157
158 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
159 {
160 struct soc_camera_device *icd = pcdev->icd;
161 unsigned long phys_addr;
162
163 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1);
164 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313);
165 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1);
166
167 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000);
168
169 ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
170
171 if (!pcdev->active)
172 return;
173
174 phys_addr = videobuf_to_dma_contig(pcdev->active);
175 ceu_write(pcdev, CDAYR, phys_addr);
176
177 switch (icd->current_fmt->fourcc) {
178 case V4L2_PIX_FMT_NV12:
179 case V4L2_PIX_FMT_NV21:
180 case V4L2_PIX_FMT_NV16:
181 case V4L2_PIX_FMT_NV61:
182 phys_addr += (icd->width * icd->height);
183 ceu_write(pcdev, CDACR, phys_addr);
184 }
185
186 pcdev->active->state = VIDEOBUF_ACTIVE;
187 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
188 }
189
190 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
191 struct videobuf_buffer *vb,
192 enum v4l2_field field)
193 {
194 struct soc_camera_device *icd = vq->priv_data;
195 struct sh_mobile_ceu_buffer *buf;
196 int ret;
197
198 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
199
200 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
201 vb, vb->baddr, vb->bsize);
202
203 /* Added list head initialization on alloc */
204 WARN_ON(!list_empty(&vb->queue));
205
206 #ifdef DEBUG
207 /* This can be useful if you want to see if we actually fill
208 * the buffer with something */
209 memset((void *)vb->baddr, 0xaa, vb->bsize);
210 #endif
211
212 BUG_ON(NULL == icd->current_fmt);
213
214 if (buf->fmt != icd->current_fmt ||
215 vb->width != icd->width ||
216 vb->height != icd->height ||
217 vb->field != field) {
218 buf->fmt = icd->current_fmt;
219 vb->width = icd->width;
220 vb->height = icd->height;
221 vb->field = field;
222 vb->state = VIDEOBUF_NEEDS_INIT;
223 }
224
225 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
226 if (0 != vb->baddr && vb->bsize < vb->size) {
227 ret = -EINVAL;
228 goto out;
229 }
230
231 if (vb->state == VIDEOBUF_NEEDS_INIT) {
232 ret = videobuf_iolock(vq, vb, NULL);
233 if (ret)
234 goto fail;
235 vb->state = VIDEOBUF_PREPARED;
236 }
237
238 return 0;
239 fail:
240 free_buffer(vq, buf);
241 out:
242 return ret;
243 }
244
245 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
246 struct videobuf_buffer *vb)
247 {
248 struct soc_camera_device *icd = vq->priv_data;
249 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
250 struct sh_mobile_ceu_dev *pcdev = ici->priv;
251 unsigned long flags;
252
253 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
254 vb, vb->baddr, vb->bsize);
255
256 vb->state = VIDEOBUF_QUEUED;
257 spin_lock_irqsave(&pcdev->lock, flags);
258 list_add_tail(&vb->queue, &pcdev->capture);
259
260 if (!pcdev->active) {
261 pcdev->active = vb;
262 sh_mobile_ceu_capture(pcdev);
263 }
264
265 spin_unlock_irqrestore(&pcdev->lock, flags);
266 }
267
268 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
269 struct videobuf_buffer *vb)
270 {
271 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
272 }
273
274 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
275 .buf_setup = sh_mobile_ceu_videobuf_setup,
276 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
277 .buf_queue = sh_mobile_ceu_videobuf_queue,
278 .buf_release = sh_mobile_ceu_videobuf_release,
279 };
280
281 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
282 {
283 struct sh_mobile_ceu_dev *pcdev = data;
284 struct videobuf_buffer *vb;
285 unsigned long flags;
286
287 spin_lock_irqsave(&pcdev->lock, flags);
288
289 vb = pcdev->active;
290 list_del_init(&vb->queue);
291
292 if (!list_empty(&pcdev->capture))
293 pcdev->active = list_entry(pcdev->capture.next,
294 struct videobuf_buffer, queue);
295 else
296 pcdev->active = NULL;
297
298 sh_mobile_ceu_capture(pcdev);
299
300 vb->state = VIDEOBUF_DONE;
301 do_gettimeofday(&vb->ts);
302 vb->field_count++;
303 wake_up(&vb->done);
304 spin_unlock_irqrestore(&pcdev->lock, flags);
305
306 return IRQ_HANDLED;
307 }
308
309 /* Called with .video_lock held */
310 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
311 {
312 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
313 struct sh_mobile_ceu_dev *pcdev = ici->priv;
314 int ret = -EBUSY;
315
316 if (pcdev->icd)
317 goto err;
318
319 dev_info(&icd->dev,
320 "SuperH Mobile CEU driver attached to camera %d\n",
321 icd->devnum);
322
323 ret = icd->ops->init(icd);
324 if (ret)
325 goto err;
326
327 clk_enable(pcdev->clk);
328
329 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
330 while (ceu_read(pcdev, CSTSR) & 1)
331 msleep(1);
332
333 pcdev->icd = icd;
334 err:
335 return ret;
336 }
337
338 /* Called with .video_lock held */
339 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
340 {
341 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
342 struct sh_mobile_ceu_dev *pcdev = ici->priv;
343 unsigned long flags;
344
345 BUG_ON(icd != pcdev->icd);
346
347 /* disable capture, disable interrupts */
348 ceu_write(pcdev, CEIER, 0);
349 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
350
351 /* make sure active buffer is canceled */
352 spin_lock_irqsave(&pcdev->lock, flags);
353 if (pcdev->active) {
354 list_del(&pcdev->active->queue);
355 pcdev->active->state = VIDEOBUF_ERROR;
356 wake_up_all(&pcdev->active->done);
357 pcdev->active = NULL;
358 }
359 spin_unlock_irqrestore(&pcdev->lock, flags);
360
361 clk_disable(pcdev->clk);
362
363 icd->ops->release(icd);
364
365 dev_info(&icd->dev,
366 "SuperH Mobile CEU driver detached from camera %d\n",
367 icd->devnum);
368
369 pcdev->icd = NULL;
370 }
371
372 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
373 __u32 pixfmt)
374 {
375 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
376 struct sh_mobile_ceu_dev *pcdev = ici->priv;
377 int ret, buswidth, width, cfszr_width, cdwdr_width;
378 unsigned long camera_flags, common_flags, value;
379 int yuv_mode, yuv_lineskip;
380
381 camera_flags = icd->ops->query_bus_param(icd);
382 common_flags = soc_camera_bus_param_compatible(camera_flags,
383 pcdev->pdata->flags);
384 if (!common_flags)
385 return -EINVAL;
386
387 ret = icd->ops->set_bus_param(icd, common_flags);
388 if (ret < 0)
389 return ret;
390
391 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
392 case SOCAM_DATAWIDTH_8:
393 buswidth = 8;
394 break;
395 case SOCAM_DATAWIDTH_16:
396 buswidth = 16;
397 break;
398 default:
399 return -EINVAL;
400 }
401
402 ceu_write(pcdev, CRCNTR, 0);
403 ceu_write(pcdev, CRCMPR, 0);
404
405 value = 0x00000010; /* data fetch by default */
406 yuv_mode = yuv_lineskip = 0;
407
408 switch (icd->current_fmt->fourcc) {
409 case V4L2_PIX_FMT_NV12:
410 case V4L2_PIX_FMT_NV21:
411 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
412 /* fall-through */
413 case V4L2_PIX_FMT_NV16:
414 case V4L2_PIX_FMT_NV61:
415 yuv_mode = 1;
416 switch (pcdev->camera_fmt->fourcc) {
417 case V4L2_PIX_FMT_UYVY:
418 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
419 break;
420 case V4L2_PIX_FMT_VYUY:
421 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
422 break;
423 case V4L2_PIX_FMT_YUYV:
424 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
425 break;
426 case V4L2_PIX_FMT_YVYU:
427 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
428 break;
429 default:
430 BUG();
431 }
432 }
433
434 if ((icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21) ||
435 (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61))
436 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
437
438 value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0;
439 value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0;
440 value |= (buswidth == 16) ? (1 << 12) : 0;
441 ceu_write(pcdev, CAMCR, value);
442
443 ceu_write(pcdev, CAPCR, 0x00300000);
444 ceu_write(pcdev, CAIFR, 0);
445
446 mdelay(1);
447
448 if (yuv_mode) {
449 width = icd->width * 2;
450 width = (buswidth == 16) ? width / 2 : width;
451 cfszr_width = cdwdr_width = icd->width;
452 } else {
453 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
454 width = (buswidth == 16) ? width / 2 : width;
455 cfszr_width = (buswidth == 8) ? width / 2 : width;
456 cdwdr_width = (buswidth == 16) ? width * 2 : width;
457 }
458
459 ceu_write(pcdev, CAMOR, 0);
460 ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
461 ceu_write(pcdev, CFLCR, 0); /* no scaling */
462 ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
463 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
464
465 /* A few words about byte order (observed in Big Endian mode)
466 *
467 * In data fetch mode bytes are received in chunks of 8 bytes.
468 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
469 *
470 * The data is however by default written to memory in reverse order:
471 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
472 *
473 * The lowest three bits of CDOCR allows us to do swapping,
474 * using 7 we swap the data bytes to match the incoming order:
475 * D0, D1, D2, D3, D4, D5, D6, D7
476 */
477 value = 0x00000017;
478 if (yuv_lineskip)
479 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
480
481 ceu_write(pcdev, CDOCR, value);
482
483 ceu_write(pcdev, CDWDR, cdwdr_width);
484 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
485
486 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
487 return 0;
488 }
489
490 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
491 {
492 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
493 struct sh_mobile_ceu_dev *pcdev = ici->priv;
494 unsigned long camera_flags, common_flags;
495
496 camera_flags = icd->ops->query_bus_param(icd);
497 common_flags = soc_camera_bus_param_compatible(camera_flags,
498 pcdev->pdata->flags);
499 if (!common_flags)
500 return -EINVAL;
501
502 return 0;
503 }
504
505 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
506 {
507 .name = "NV12",
508 .depth = 12,
509 .fourcc = V4L2_PIX_FMT_NV12,
510 .colorspace = V4L2_COLORSPACE_JPEG,
511 },
512 {
513 .name = "NV21",
514 .depth = 12,
515 .fourcc = V4L2_PIX_FMT_NV21,
516 .colorspace = V4L2_COLORSPACE_JPEG,
517 },
518 {
519 .name = "NV16",
520 .depth = 16,
521 .fourcc = V4L2_PIX_FMT_NV16,
522 .colorspace = V4L2_COLORSPACE_JPEG,
523 },
524 {
525 .name = "NV61",
526 .depth = 16,
527 .fourcc = V4L2_PIX_FMT_NV61,
528 .colorspace = V4L2_COLORSPACE_JPEG,
529 },
530 };
531
532 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
533 struct soc_camera_format_xlate *xlate)
534 {
535 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
536 int ret, k, n;
537 int formats = 0;
538
539 ret = sh_mobile_ceu_try_bus_param(icd);
540 if (ret < 0)
541 return 0;
542
543 switch (icd->formats[idx].fourcc) {
544 case V4L2_PIX_FMT_UYVY:
545 case V4L2_PIX_FMT_VYUY:
546 case V4L2_PIX_FMT_YUYV:
547 case V4L2_PIX_FMT_YVYU:
548 n = ARRAY_SIZE(sh_mobile_ceu_formats);
549 formats += n;
550 for (k = 0; xlate && k < n; k++) {
551 xlate->host_fmt = &sh_mobile_ceu_formats[k];
552 xlate->cam_fmt = icd->formats + idx;
553 xlate->buswidth = icd->formats[idx].depth;
554 xlate++;
555 dev_dbg(&ici->dev, "Providing format %s using %s\n",
556 sh_mobile_ceu_formats[k].name,
557 icd->formats[idx].name);
558 }
559 default:
560 /* Generic pass-through */
561 formats++;
562 if (xlate) {
563 xlate->host_fmt = icd->formats + idx;
564 xlate->cam_fmt = icd->formats + idx;
565 xlate->buswidth = icd->formats[idx].depth;
566 xlate++;
567 dev_dbg(&ici->dev,
568 "Providing format %s in pass-through mode\n",
569 icd->formats[idx].name);
570 }
571 }
572
573 return formats;
574 }
575
576 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
577 __u32 pixfmt, struct v4l2_rect *rect)
578 {
579 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
580 struct sh_mobile_ceu_dev *pcdev = ici->priv;
581 const struct soc_camera_format_xlate *xlate;
582 int ret;
583
584 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
585 if (!xlate) {
586 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
587 return -EINVAL;
588 }
589
590 switch (pixfmt) {
591 case 0: /* Only geometry change */
592 ret = icd->ops->set_fmt(icd, pixfmt, rect);
593 break;
594 default:
595 ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect);
596 }
597
598 if (pixfmt && !ret) {
599 icd->buswidth = xlate->buswidth;
600 icd->current_fmt = xlate->host_fmt;
601 pcdev->camera_fmt = xlate->cam_fmt;
602 }
603
604 return ret;
605 }
606
607 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
608 struct v4l2_format *f)
609 {
610 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
611 const struct soc_camera_format_xlate *xlate;
612 __u32 pixfmt = f->fmt.pix.pixelformat;
613
614 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
615 if (!xlate) {
616 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
617 return -EINVAL;
618 }
619
620 /* FIXME: calculate using depth and bus width */
621
622 if (f->fmt.pix.height < 4)
623 f->fmt.pix.height = 4;
624 if (f->fmt.pix.height > 1920)
625 f->fmt.pix.height = 1920;
626 if (f->fmt.pix.width < 2)
627 f->fmt.pix.width = 2;
628 if (f->fmt.pix.width > 2560)
629 f->fmt.pix.width = 2560;
630 f->fmt.pix.width &= ~0x01;
631 f->fmt.pix.height &= ~0x03;
632
633 f->fmt.pix.bytesperline = f->fmt.pix.width *
634 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
635 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
636
637 /* limit to sensor capabilities */
638 return icd->ops->try_fmt(icd, f);
639 }
640
641 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
642 struct v4l2_requestbuffers *p)
643 {
644 int i;
645
646 /* This is for locking debugging only. I removed spinlocks and now I
647 * check whether .prepare is ever called on a linked buffer, or whether
648 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
649 * it hadn't triggered */
650 for (i = 0; i < p->count; i++) {
651 struct sh_mobile_ceu_buffer *buf;
652
653 buf = container_of(icf->vb_vidq.bufs[i],
654 struct sh_mobile_ceu_buffer, vb);
655 INIT_LIST_HEAD(&buf->vb.queue);
656 }
657
658 return 0;
659 }
660
661 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
662 {
663 struct soc_camera_file *icf = file->private_data;
664 struct sh_mobile_ceu_buffer *buf;
665
666 buf = list_entry(icf->vb_vidq.stream.next,
667 struct sh_mobile_ceu_buffer, vb.stream);
668
669 poll_wait(file, &buf->vb.done, pt);
670
671 if (buf->vb.state == VIDEOBUF_DONE ||
672 buf->vb.state == VIDEOBUF_ERROR)
673 return POLLIN|POLLRDNORM;
674
675 return 0;
676 }
677
678 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
679 struct v4l2_capability *cap)
680 {
681 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
682 cap->version = KERNEL_VERSION(0, 0, 5);
683 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
684 return 0;
685 }
686
687 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
688 struct soc_camera_device *icd)
689 {
690 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
691 struct sh_mobile_ceu_dev *pcdev = ici->priv;
692
693 videobuf_queue_dma_contig_init(q,
694 &sh_mobile_ceu_videobuf_ops,
695 &ici->dev, &pcdev->lock,
696 V4L2_BUF_TYPE_VIDEO_CAPTURE,
697 V4L2_FIELD_NONE,
698 sizeof(struct sh_mobile_ceu_buffer),
699 icd);
700 }
701
702 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
703 .owner = THIS_MODULE,
704 .add = sh_mobile_ceu_add_device,
705 .remove = sh_mobile_ceu_remove_device,
706 .get_formats = sh_mobile_ceu_get_formats,
707 .set_fmt = sh_mobile_ceu_set_fmt,
708 .try_fmt = sh_mobile_ceu_try_fmt,
709 .reqbufs = sh_mobile_ceu_reqbufs,
710 .poll = sh_mobile_ceu_poll,
711 .querycap = sh_mobile_ceu_querycap,
712 .set_bus_param = sh_mobile_ceu_set_bus_param,
713 .init_videobuf = sh_mobile_ceu_init_videobuf,
714 };
715
716 static int sh_mobile_ceu_probe(struct platform_device *pdev)
717 {
718 struct sh_mobile_ceu_dev *pcdev;
719 struct resource *res;
720 void __iomem *base;
721 char clk_name[8];
722 unsigned int irq;
723 int err = 0;
724
725 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
726 irq = platform_get_irq(pdev, 0);
727 if (!res || !irq) {
728 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
729 err = -ENODEV;
730 goto exit;
731 }
732
733 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
734 if (!pcdev) {
735 dev_err(&pdev->dev, "Could not allocate pcdev\n");
736 err = -ENOMEM;
737 goto exit;
738 }
739
740 platform_set_drvdata(pdev, pcdev);
741 INIT_LIST_HEAD(&pcdev->capture);
742 spin_lock_init(&pcdev->lock);
743
744 pcdev->pdata = pdev->dev.platform_data;
745 if (!pcdev->pdata) {
746 err = -EINVAL;
747 dev_err(&pdev->dev, "CEU platform data not set.\n");
748 goto exit_kfree;
749 }
750
751 base = ioremap_nocache(res->start, res->end - res->start + 1);
752 if (!base) {
753 err = -ENXIO;
754 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
755 goto exit_kfree;
756 }
757
758 pcdev->irq = irq;
759 pcdev->base = base;
760 pcdev->video_limit = 0; /* only enabled if second resource exists */
761 pcdev->dev = &pdev->dev;
762
763 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
764 if (res) {
765 err = dma_declare_coherent_memory(&pdev->dev, res->start,
766 res->start,
767 (res->end - res->start) + 1,
768 DMA_MEMORY_MAP |
769 DMA_MEMORY_EXCLUSIVE);
770 if (!err) {
771 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
772 err = -ENXIO;
773 goto exit_iounmap;
774 }
775
776 pcdev->video_limit = (res->end - res->start) + 1;
777 }
778
779 /* request irq */
780 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
781 dev_name(&pdev->dev), pcdev);
782 if (err) {
783 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
784 goto exit_release_mem;
785 }
786
787 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
788 pcdev->clk = clk_get(&pdev->dev, clk_name);
789 if (IS_ERR(pcdev->clk)) {
790 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
791 err = PTR_ERR(pcdev->clk);
792 goto exit_free_irq;
793 }
794
795 pcdev->ici.priv = pcdev;
796 pcdev->ici.dev.parent = &pdev->dev;
797 pcdev->ici.nr = pdev->id;
798 pcdev->ici.drv_name = dev_name(&pdev->dev);
799 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
800
801 err = soc_camera_host_register(&pcdev->ici);
802 if (err)
803 goto exit_free_clk;
804
805 return 0;
806
807 exit_free_clk:
808 clk_put(pcdev->clk);
809 exit_free_irq:
810 free_irq(pcdev->irq, pcdev);
811 exit_release_mem:
812 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
813 dma_release_declared_memory(&pdev->dev);
814 exit_iounmap:
815 iounmap(base);
816 exit_kfree:
817 kfree(pcdev);
818 exit:
819 return err;
820 }
821
822 static int sh_mobile_ceu_remove(struct platform_device *pdev)
823 {
824 struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
825
826 soc_camera_host_unregister(&pcdev->ici);
827 clk_put(pcdev->clk);
828 free_irq(pcdev->irq, pcdev);
829 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
830 dma_release_declared_memory(&pdev->dev);
831 iounmap(pcdev->base);
832 kfree(pcdev);
833 return 0;
834 }
835
836 static struct platform_driver sh_mobile_ceu_driver = {
837 .driver = {
838 .name = "sh_mobile_ceu",
839 },
840 .probe = sh_mobile_ceu_probe,
841 .remove = sh_mobile_ceu_remove,
842 };
843
844 static int __init sh_mobile_ceu_init(void)
845 {
846 return platform_driver_register(&sh_mobile_ceu_driver);
847 }
848
849 static void __exit sh_mobile_ceu_exit(void)
850 {
851 platform_driver_unregister(&sh_mobile_ceu_driver);
852 }
853
854 module_init(sh_mobile_ceu_init);
855 module_exit(sh_mobile_ceu_exit);
856
857 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
858 MODULE_AUTHOR("Magnus Damm");
859 MODULE_LICENSE("GPL");
Verdex Pro support