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V4L/DVB (11024): soc-camera: separate S_FMT and S_CROP operations
[linux-2.6/mini2440.git] / drivers / media / video / sh_mobile_ceu_camera.c
blob3f71cb809652670d663d8d135e3f30485cf263a8
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 int is_interlace;
98
99 struct sh_mobile_ceu_info *pdata;
100
101 const struct soc_camera_data_format *camera_fmt;
102 };
103
104 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
105 {
106 unsigned long flags;
107
108 flags = SOCAM_MASTER |
109 SOCAM_PCLK_SAMPLE_RISING |
110 SOCAM_HSYNC_ACTIVE_HIGH |
111 SOCAM_HSYNC_ACTIVE_LOW |
112 SOCAM_VSYNC_ACTIVE_HIGH |
113 SOCAM_VSYNC_ACTIVE_LOW |
114 SOCAM_DATA_ACTIVE_HIGH;
115
116 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
117 flags |= SOCAM_DATAWIDTH_8;
118
119 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
120 flags |= SOCAM_DATAWIDTH_16;
121
122 if (flags & SOCAM_DATAWIDTH_MASK)
123 return flags;
124
125 return 0;
126 }
127
128 static void ceu_write(struct sh_mobile_ceu_dev *priv,
129 unsigned long reg_offs, u32 data)
130 {
131 iowrite32(data, priv->base + reg_offs);
132 }
133
134 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
135 {
136 return ioread32(priv->base + reg_offs);
137 }
138
139 /*
140 * Videobuf operations
141 */
142 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
143 unsigned int *count,
144 unsigned int *size)
145 {
146 struct soc_camera_device *icd = vq->priv_data;
147 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
148 struct sh_mobile_ceu_dev *pcdev = ici->priv;
149 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
150
151 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
152
153 if (0 == *count)
154 *count = 2;
155
156 if (pcdev->video_limit) {
157 while (*size * *count > pcdev->video_limit)
158 (*count)--;
159 }
160
161 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
162
163 return 0;
164 }
165
166 static void free_buffer(struct videobuf_queue *vq,
167 struct sh_mobile_ceu_buffer *buf)
168 {
169 struct soc_camera_device *icd = vq->priv_data;
170
171 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
172 &buf->vb, buf->vb.baddr, buf->vb.bsize);
173
174 if (in_interrupt())
175 BUG();
176
177 videobuf_dma_contig_free(vq, &buf->vb);
178 dev_dbg(&icd->dev, "%s freed\n", __func__);
179 buf->vb.state = VIDEOBUF_NEEDS_INIT;
180 }
181
182 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
183 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
184 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
185 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
186
187
188 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
189 {
190 struct soc_camera_device *icd = pcdev->icd;
191 dma_addr_t phys_addr_top, phys_addr_bottom;
192
193 /* The hardware is _very_ picky about this sequence. Especially
194 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
195 * several not-so-well documented interrupt sources in CETCR.
196 */
197 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
198 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
199 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
200 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
201 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
202
203 if (!pcdev->active)
204 return;
205
206 phys_addr_top = videobuf_to_dma_contig(pcdev->active);
207 ceu_write(pcdev, CDAYR, phys_addr_top);
208 if (pcdev->is_interlace) {
209 phys_addr_bottom = phys_addr_top + icd->width;
210 ceu_write(pcdev, CDBYR, phys_addr_bottom);
211 }
212
213 switch (icd->current_fmt->fourcc) {
214 case V4L2_PIX_FMT_NV12:
215 case V4L2_PIX_FMT_NV21:
216 case V4L2_PIX_FMT_NV16:
217 case V4L2_PIX_FMT_NV61:
218 phys_addr_top += icd->width * icd->height;
219 ceu_write(pcdev, CDACR, phys_addr_top);
220 if (pcdev->is_interlace) {
221 phys_addr_bottom = phys_addr_top + icd->width;
222 ceu_write(pcdev, CDBCR, phys_addr_bottom);
223 }
224 }
225
226 pcdev->active->state = VIDEOBUF_ACTIVE;
227 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
228 }
229
230 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
231 struct videobuf_buffer *vb,
232 enum v4l2_field field)
233 {
234 struct soc_camera_device *icd = vq->priv_data;
235 struct sh_mobile_ceu_buffer *buf;
236 int ret;
237
238 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
239
240 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
241 vb, vb->baddr, vb->bsize);
242
243 /* Added list head initialization on alloc */
244 WARN_ON(!list_empty(&vb->queue));
245
246 #ifdef DEBUG
247 /* This can be useful if you want to see if we actually fill
248 * the buffer with something */
249 memset((void *)vb->baddr, 0xaa, vb->bsize);
250 #endif
251
252 BUG_ON(NULL == icd->current_fmt);
253
254 if (buf->fmt != icd->current_fmt ||
255 vb->width != icd->width ||
256 vb->height != icd->height ||
257 vb->field != field) {
258 buf->fmt = icd->current_fmt;
259 vb->width = icd->width;
260 vb->height = icd->height;
261 vb->field = field;
262 vb->state = VIDEOBUF_NEEDS_INIT;
263 }
264
265 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
266 if (0 != vb->baddr && vb->bsize < vb->size) {
267 ret = -EINVAL;
268 goto out;
269 }
270
271 if (vb->state == VIDEOBUF_NEEDS_INIT) {
272 ret = videobuf_iolock(vq, vb, NULL);
273 if (ret)
274 goto fail;
275 vb->state = VIDEOBUF_PREPARED;
276 }
277
278 return 0;
279 fail:
280 free_buffer(vq, buf);
281 out:
282 return ret;
283 }
284
285 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
286 struct videobuf_buffer *vb)
287 {
288 struct soc_camera_device *icd = vq->priv_data;
289 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
290 struct sh_mobile_ceu_dev *pcdev = ici->priv;
291 unsigned long flags;
292
293 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
294 vb, vb->baddr, vb->bsize);
295
296 vb->state = VIDEOBUF_QUEUED;
297 spin_lock_irqsave(&pcdev->lock, flags);
298 list_add_tail(&vb->queue, &pcdev->capture);
299
300 if (!pcdev->active) {
301 pcdev->active = vb;
302 sh_mobile_ceu_capture(pcdev);
303 }
304
305 spin_unlock_irqrestore(&pcdev->lock, flags);
306 }
307
308 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
309 struct videobuf_buffer *vb)
310 {
311 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
312 }
313
314 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
315 .buf_setup = sh_mobile_ceu_videobuf_setup,
316 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
317 .buf_queue = sh_mobile_ceu_videobuf_queue,
318 .buf_release = sh_mobile_ceu_videobuf_release,
319 };
320
321 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
322 {
323 struct sh_mobile_ceu_dev *pcdev = data;
324 struct videobuf_buffer *vb;
325 unsigned long flags;
326
327 spin_lock_irqsave(&pcdev->lock, flags);
328
329 vb = pcdev->active;
330 list_del_init(&vb->queue);
331
332 if (!list_empty(&pcdev->capture))
333 pcdev->active = list_entry(pcdev->capture.next,
334 struct videobuf_buffer, queue);
335 else
336 pcdev->active = NULL;
337
338 sh_mobile_ceu_capture(pcdev);
339
340 vb->state = VIDEOBUF_DONE;
341 do_gettimeofday(&vb->ts);
342 vb->field_count++;
343 wake_up(&vb->done);
344 spin_unlock_irqrestore(&pcdev->lock, flags);
345
346 return IRQ_HANDLED;
347 }
348
349 /* Called with .video_lock held */
350 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
351 {
352 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
353 struct sh_mobile_ceu_dev *pcdev = ici->priv;
354 int ret = -EBUSY;
355
356 if (pcdev->icd)
357 goto err;
358
359 dev_info(&icd->dev,
360 "SuperH Mobile CEU driver attached to camera %d\n",
361 icd->devnum);
362
363 ret = icd->ops->init(icd);
364 if (ret)
365 goto err;
366
367 clk_enable(pcdev->clk);
368
369 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
370 while (ceu_read(pcdev, CSTSR) & 1)
371 msleep(1);
372
373 pcdev->icd = icd;
374 err:
375 return ret;
376 }
377
378 /* Called with .video_lock held */
379 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
380 {
381 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
382 struct sh_mobile_ceu_dev *pcdev = ici->priv;
383 unsigned long flags;
384
385 BUG_ON(icd != pcdev->icd);
386
387 /* disable capture, disable interrupts */
388 ceu_write(pcdev, CEIER, 0);
389 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
390
391 /* make sure active buffer is canceled */
392 spin_lock_irqsave(&pcdev->lock, flags);
393 if (pcdev->active) {
394 list_del(&pcdev->active->queue);
395 pcdev->active->state = VIDEOBUF_ERROR;
396 wake_up_all(&pcdev->active->done);
397 pcdev->active = NULL;
398 }
399 spin_unlock_irqrestore(&pcdev->lock, flags);
400
401 clk_disable(pcdev->clk);
402
403 icd->ops->release(icd);
404
405 dev_info(&icd->dev,
406 "SuperH Mobile CEU driver detached from camera %d\n",
407 icd->devnum);
408
409 pcdev->icd = NULL;
410 }
411
412 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
413 __u32 pixfmt)
414 {
415 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
416 struct sh_mobile_ceu_dev *pcdev = ici->priv;
417 int ret, buswidth, width, height, cfszr_width, cdwdr_width;
418 unsigned long camera_flags, common_flags, value;
419 int yuv_mode, yuv_lineskip;
420
421 camera_flags = icd->ops->query_bus_param(icd);
422 common_flags = soc_camera_bus_param_compatible(camera_flags,
423 make_bus_param(pcdev));
424 if (!common_flags)
425 return -EINVAL;
426
427 ret = icd->ops->set_bus_param(icd, common_flags);
428 if (ret < 0)
429 return ret;
430
431 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
432 case SOCAM_DATAWIDTH_8:
433 buswidth = 8;
434 break;
435 case SOCAM_DATAWIDTH_16:
436 buswidth = 16;
437 break;
438 default:
439 return -EINVAL;
440 }
441
442 ceu_write(pcdev, CRCNTR, 0);
443 ceu_write(pcdev, CRCMPR, 0);
444
445 value = 0x00000010; /* data fetch by default */
446 yuv_mode = yuv_lineskip = 0;
447
448 switch (icd->current_fmt->fourcc) {
449 case V4L2_PIX_FMT_NV12:
450 case V4L2_PIX_FMT_NV21:
451 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
452 /* fall-through */
453 case V4L2_PIX_FMT_NV16:
454 case V4L2_PIX_FMT_NV61:
455 yuv_mode = 1;
456 switch (pcdev->camera_fmt->fourcc) {
457 case V4L2_PIX_FMT_UYVY:
458 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
459 break;
460 case V4L2_PIX_FMT_VYUY:
461 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
462 break;
463 case V4L2_PIX_FMT_YUYV:
464 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
465 break;
466 case V4L2_PIX_FMT_YVYU:
467 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
468 break;
469 default:
470 BUG();
471 }
472 }
473
474 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
475 icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
476 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
477
478 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
479 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
480 value |= buswidth == 16 ? 1 << 12 : 0;
481 ceu_write(pcdev, CAMCR, value);
482
483 ceu_write(pcdev, CAPCR, 0x00300000);
484 ceu_write(pcdev, CAIFR, (pcdev->is_interlace) ? 0x101 : 0);
485
486 mdelay(1);
487
488 if (yuv_mode) {
489 width = icd->width * 2;
490 width = buswidth == 16 ? width / 2 : width;
491 cfszr_width = cdwdr_width = icd->width;
492 } else {
493 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
494 width = buswidth == 16 ? width / 2 : width;
495 cfszr_width = buswidth == 8 ? width / 2 : width;
496 cdwdr_width = buswidth == 16 ? width * 2 : width;
497 }
498
499 height = icd->height;
500 if (pcdev->is_interlace) {
501 height /= 2;
502 cdwdr_width *= 2;
503 }
504
505 ceu_write(pcdev, CAMOR, 0);
506 ceu_write(pcdev, CAPWR, (height << 16) | width);
507 ceu_write(pcdev, CFLCR, 0); /* no scaling */
508 ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
509 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
510
511 /* A few words about byte order (observed in Big Endian mode)
512 *
513 * In data fetch mode bytes are received in chunks of 8 bytes.
514 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
515 *
516 * The data is however by default written to memory in reverse order:
517 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
518 *
519 * The lowest three bits of CDOCR allows us to do swapping,
520 * using 7 we swap the data bytes to match the incoming order:
521 * D0, D1, D2, D3, D4, D5, D6, D7
522 */
523 value = 0x00000017;
524 if (yuv_lineskip)
525 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
526
527 ceu_write(pcdev, CDOCR, value);
528
529 ceu_write(pcdev, CDWDR, cdwdr_width);
530 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
531
532 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
533 return 0;
534 }
535
536 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
537 {
538 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
539 struct sh_mobile_ceu_dev *pcdev = ici->priv;
540 unsigned long camera_flags, common_flags;
541
542 camera_flags = icd->ops->query_bus_param(icd);
543 common_flags = soc_camera_bus_param_compatible(camera_flags,
544 make_bus_param(pcdev));
545 if (!common_flags)
546 return -EINVAL;
547
548 return 0;
549 }
550
551 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
552 {
553 .name = "NV12",
554 .depth = 12,
555 .fourcc = V4L2_PIX_FMT_NV12,
556 .colorspace = V4L2_COLORSPACE_JPEG,
557 },
558 {
559 .name = "NV21",
560 .depth = 12,
561 .fourcc = V4L2_PIX_FMT_NV21,
562 .colorspace = V4L2_COLORSPACE_JPEG,
563 },
564 {
565 .name = "NV16",
566 .depth = 16,
567 .fourcc = V4L2_PIX_FMT_NV16,
568 .colorspace = V4L2_COLORSPACE_JPEG,
569 },
570 {
571 .name = "NV61",
572 .depth = 16,
573 .fourcc = V4L2_PIX_FMT_NV61,
574 .colorspace = V4L2_COLORSPACE_JPEG,
575 },
576 };
577
578 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
579 struct soc_camera_format_xlate *xlate)
580 {
581 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
582 int ret, k, n;
583 int formats = 0;
584
585 ret = sh_mobile_ceu_try_bus_param(icd);
586 if (ret < 0)
587 return 0;
588
589 /* Beginning of a pass */
590 if (!idx)
591 icd->host_priv = NULL;
592
593 switch (icd->formats[idx].fourcc) {
594 case V4L2_PIX_FMT_UYVY:
595 case V4L2_PIX_FMT_VYUY:
596 case V4L2_PIX_FMT_YUYV:
597 case V4L2_PIX_FMT_YVYU:
598 if (icd->host_priv)
599 goto add_single_format;
600
601 /*
602 * Our case is simple so far: for any of the above four camera
603 * formats we add all our four synthesized NV* formats, so,
604 * just marking the device with a single flag suffices. If
605 * the format generation rules are more complex, you would have
606 * to actually hang your already added / counted formats onto
607 * the host_priv pointer and check whether the format you're
608 * going to add now is already there.
609 */
610 icd->host_priv = (void *)sh_mobile_ceu_formats;
611
612 n = ARRAY_SIZE(sh_mobile_ceu_formats);
613 formats += n;
614 for (k = 0; xlate && k < n; k++) {
615 xlate->host_fmt = &sh_mobile_ceu_formats[k];
616 xlate->cam_fmt = icd->formats + idx;
617 xlate->buswidth = icd->formats[idx].depth;
618 xlate++;
619 dev_dbg(&ici->dev, "Providing format %s using %s\n",
620 sh_mobile_ceu_formats[k].name,
621 icd->formats[idx].name);
622 }
623 default:
624 add_single_format:
625 /* Generic pass-through */
626 formats++;
627 if (xlate) {
628 xlate->host_fmt = icd->formats + idx;
629 xlate->cam_fmt = icd->formats + idx;
630 xlate->buswidth = icd->formats[idx].depth;
631 xlate++;
632 dev_dbg(&ici->dev,
633 "Providing format %s in pass-through mode\n",
634 icd->formats[idx].name);
635 }
636 }
637
638 return formats;
639 }
640
641 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
642 struct v4l2_rect *rect)
643 {
644 return icd->ops->set_crop(icd, rect);
645 }
646
647 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
648 struct v4l2_format *f)
649 {
650 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
651 struct sh_mobile_ceu_dev *pcdev = ici->priv;
652 __u32 pixfmt = f->fmt.pix.pixelformat;
653 const struct soc_camera_format_xlate *xlate;
654 struct v4l2_format cam_f = *f;
655 int ret;
656
657 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
658 if (!xlate) {
659 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
660 return -EINVAL;
661 }
662
663 cam_f.fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
664 ret = icd->ops->set_fmt(icd, &cam_f);
665
666 if (!ret) {
667 icd->buswidth = xlate->buswidth;
668 icd->current_fmt = xlate->host_fmt;
669 pcdev->camera_fmt = xlate->cam_fmt;
670 }
671
672 return ret;
673 }
674
675 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
676 struct v4l2_format *f)
677 {
678 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
679 struct sh_mobile_ceu_dev *pcdev = ici->priv;
680 const struct soc_camera_format_xlate *xlate;
681 __u32 pixfmt = f->fmt.pix.pixelformat;
682 int ret;
683
684 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
685 if (!xlate) {
686 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
687 return -EINVAL;
688 }
689
690 /* FIXME: calculate using depth and bus width */
691
692 if (f->fmt.pix.height < 4)
693 f->fmt.pix.height = 4;
694 if (f->fmt.pix.height > 1920)
695 f->fmt.pix.height = 1920;
696 if (f->fmt.pix.width < 2)
697 f->fmt.pix.width = 2;
698 if (f->fmt.pix.width > 2560)
699 f->fmt.pix.width = 2560;
700 f->fmt.pix.width &= ~0x01;
701 f->fmt.pix.height &= ~0x03;
702
703 f->fmt.pix.bytesperline = f->fmt.pix.width *
704 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
705 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
706
707 /* limit to sensor capabilities */
708 ret = icd->ops->try_fmt(icd, f);
709 if (ret < 0)
710 return ret;
711
712 switch (f->fmt.pix.field) {
713 case V4L2_FIELD_INTERLACED:
714 pcdev->is_interlace = 1;
715 break;
716 case V4L2_FIELD_ANY:
717 f->fmt.pix.field = V4L2_FIELD_NONE;
718 /* fall-through */
719 case V4L2_FIELD_NONE:
720 pcdev->is_interlace = 0;
721 break;
722 default:
723 ret = -EINVAL;
724 break;
725 }
726
727 return ret;
728 }
729
730 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
731 struct v4l2_requestbuffers *p)
732 {
733 int i;
734
735 /* This is for locking debugging only. I removed spinlocks and now I
736 * check whether .prepare is ever called on a linked buffer, or whether
737 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
738 * it hadn't triggered */
739 for (i = 0; i < p->count; i++) {
740 struct sh_mobile_ceu_buffer *buf;
741
742 buf = container_of(icf->vb_vidq.bufs[i],
743 struct sh_mobile_ceu_buffer, vb);
744 INIT_LIST_HEAD(&buf->vb.queue);
745 }
746
747 return 0;
748 }
749
750 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
751 {
752 struct soc_camera_file *icf = file->private_data;
753 struct sh_mobile_ceu_buffer *buf;
754
755 buf = list_entry(icf->vb_vidq.stream.next,
756 struct sh_mobile_ceu_buffer, vb.stream);
757
758 poll_wait(file, &buf->vb.done, pt);
759
760 if (buf->vb.state == VIDEOBUF_DONE ||
761 buf->vb.state == VIDEOBUF_ERROR)
762 return POLLIN|POLLRDNORM;
763
764 return 0;
765 }
766
767 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
768 struct v4l2_capability *cap)
769 {
770 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
771 cap->version = KERNEL_VERSION(0, 0, 5);
772 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
773 return 0;
774 }
775
776 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
777 struct soc_camera_device *icd)
778 {
779 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
780 struct sh_mobile_ceu_dev *pcdev = ici->priv;
781
782 videobuf_queue_dma_contig_init(q,
783 &sh_mobile_ceu_videobuf_ops,
784 &ici->dev, &pcdev->lock,
785 V4L2_BUF_TYPE_VIDEO_CAPTURE,
786 V4L2_FIELD_ANY,
787 sizeof(struct sh_mobile_ceu_buffer),
788 icd);
789 }
790
791 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
792 .owner = THIS_MODULE,
793 .add = sh_mobile_ceu_add_device,
794 .remove = sh_mobile_ceu_remove_device,
795 .get_formats = sh_mobile_ceu_get_formats,
796 .set_crop = sh_mobile_ceu_set_crop,
797 .set_fmt = sh_mobile_ceu_set_fmt,
798 .try_fmt = sh_mobile_ceu_try_fmt,
799 .reqbufs = sh_mobile_ceu_reqbufs,
800 .poll = sh_mobile_ceu_poll,
801 .querycap = sh_mobile_ceu_querycap,
802 .set_bus_param = sh_mobile_ceu_set_bus_param,
803 .init_videobuf = sh_mobile_ceu_init_videobuf,
804 };
805
806 static int sh_mobile_ceu_probe(struct platform_device *pdev)
807 {
808 struct sh_mobile_ceu_dev *pcdev;
809 struct resource *res;
810 void __iomem *base;
811 char clk_name[8];
812 unsigned int irq;
813 int err = 0;
814
815 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
816 irq = platform_get_irq(pdev, 0);
817 if (!res || !irq) {
818 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
819 err = -ENODEV;
820 goto exit;
821 }
822
823 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
824 if (!pcdev) {
825 dev_err(&pdev->dev, "Could not allocate pcdev\n");
826 err = -ENOMEM;
827 goto exit;
828 }
829
830 platform_set_drvdata(pdev, pcdev);
831 INIT_LIST_HEAD(&pcdev->capture);
832 spin_lock_init(&pcdev->lock);
833
834 pcdev->pdata = pdev->dev.platform_data;
835 if (!pcdev->pdata) {
836 err = -EINVAL;
837 dev_err(&pdev->dev, "CEU platform data not set.\n");
838 goto exit_kfree;
839 }
840
841 base = ioremap_nocache(res->start, res->end - res->start + 1);
842 if (!base) {
843 err = -ENXIO;
844 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
845 goto exit_kfree;
846 }
847
848 pcdev->irq = irq;
849 pcdev->base = base;
850 pcdev->video_limit = 0; /* only enabled if second resource exists */
851 pcdev->dev = &pdev->dev;
852
853 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
854 if (res) {
855 err = dma_declare_coherent_memory(&pdev->dev, res->start,
856 res->start,
857 (res->end - res->start) + 1,
858 DMA_MEMORY_MAP |
859 DMA_MEMORY_EXCLUSIVE);
860 if (!err) {
861 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
862 err = -ENXIO;
863 goto exit_iounmap;
864 }
865
866 pcdev->video_limit = (res->end - res->start) + 1;
867 }
868
869 /* request irq */
870 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
871 dev_name(&pdev->dev), pcdev);
872 if (err) {
873 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
874 goto exit_release_mem;
875 }
876
877 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
878 pcdev->clk = clk_get(&pdev->dev, clk_name);
879 if (IS_ERR(pcdev->clk)) {
880 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
881 err = PTR_ERR(pcdev->clk);
882 goto exit_free_irq;
883 }
884
885 pcdev->ici.priv = pcdev;
886 pcdev->ici.dev.parent = &pdev->dev;
887 pcdev->ici.nr = pdev->id;
888 pcdev->ici.drv_name = dev_name(&pdev->dev);
889 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
890
891 err = soc_camera_host_register(&pcdev->ici);
892 if (err)
893 goto exit_free_clk;
894
895 return 0;
896
897 exit_free_clk:
898 clk_put(pcdev->clk);
899 exit_free_irq:
900 free_irq(pcdev->irq, pcdev);
901 exit_release_mem:
902 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
903 dma_release_declared_memory(&pdev->dev);
904 exit_iounmap:
905 iounmap(base);
906 exit_kfree:
907 kfree(pcdev);
908 exit:
909 return err;
910 }
911
912 static int sh_mobile_ceu_remove(struct platform_device *pdev)
913 {
914 struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
915
916 soc_camera_host_unregister(&pcdev->ici);
917 clk_put(pcdev->clk);
918 free_irq(pcdev->irq, pcdev);
919 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
920 dma_release_declared_memory(&pdev->dev);
921 iounmap(pcdev->base);
922 kfree(pcdev);
923 return 0;
924 }
925
926 static struct platform_driver sh_mobile_ceu_driver = {
927 .driver = {
928 .name = "sh_mobile_ceu",
929 },
930 .probe = sh_mobile_ceu_probe,
931 .remove = sh_mobile_ceu_remove,
932 };
933
934 static int __init sh_mobile_ceu_init(void)
935 {
936 return platform_driver_register(&sh_mobile_ceu_driver);
937 }
938
939 static void __exit sh_mobile_ceu_exit(void)
940 {
941 platform_driver_unregister(&sh_mobile_ceu_driver);
942 }
943
944 module_init(sh_mobile_ceu_init);
945 module_exit(sh_mobile_ceu_exit);
946
947 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
948 MODULE_AUTHOR("Magnus Damm");
949 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards