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[linux-2.6/verdex.git] / drivers / media / video / sh_mobile_ceu_camera.c
blobe86878deea71771d16decce32551f8ae78cfe88b
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 soc_camera_host ici;
85 struct soc_camera_device *icd;
86
87 unsigned int irq;
88 void __iomem *base;
89 struct clk *clk;
90 unsigned long video_limit;
91
92 /* lock used to protect videobuf */
93 spinlock_t lock;
94 struct list_head capture;
95 struct videobuf_buffer *active;
96 int is_interlaced;
97
98 struct sh_mobile_ceu_info *pdata;
99
100 const struct soc_camera_data_format *camera_fmt;
101 };
102
103 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
104 {
105 unsigned long flags;
106
107 flags = SOCAM_MASTER |
108 SOCAM_PCLK_SAMPLE_RISING |
109 SOCAM_HSYNC_ACTIVE_HIGH |
110 SOCAM_HSYNC_ACTIVE_LOW |
111 SOCAM_VSYNC_ACTIVE_HIGH |
112 SOCAM_VSYNC_ACTIVE_LOW |
113 SOCAM_DATA_ACTIVE_HIGH;
114
115 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
116 flags |= SOCAM_DATAWIDTH_8;
117
118 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
119 flags |= SOCAM_DATAWIDTH_16;
120
121 if (flags & SOCAM_DATAWIDTH_MASK)
122 return flags;
123
124 return 0;
125 }
126
127 static void ceu_write(struct sh_mobile_ceu_dev *priv,
128 unsigned long reg_offs, u32 data)
129 {
130 iowrite32(data, priv->base + reg_offs);
131 }
132
133 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
134 {
135 return ioread32(priv->base + reg_offs);
136 }
137
138 /*
139 * Videobuf operations
140 */
141 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
142 unsigned int *count,
143 unsigned int *size)
144 {
145 struct soc_camera_device *icd = vq->priv_data;
146 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
147 struct sh_mobile_ceu_dev *pcdev = ici->priv;
148 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
149
150 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
151
152 if (0 == *count)
153 *count = 2;
154
155 if (pcdev->video_limit) {
156 while (*size * *count > pcdev->video_limit)
157 (*count)--;
158 }
159
160 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
161
162 return 0;
163 }
164
165 static void free_buffer(struct videobuf_queue *vq,
166 struct sh_mobile_ceu_buffer *buf)
167 {
168 struct soc_camera_device *icd = vq->priv_data;
169
170 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
171 &buf->vb, buf->vb.baddr, buf->vb.bsize);
172
173 if (in_interrupt())
174 BUG();
175
176 videobuf_waiton(&buf->vb, 0, 0);
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_interlaced) {
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_interlaced) {
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 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
286 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
287 struct videobuf_buffer *vb)
288 {
289 struct soc_camera_device *icd = vq->priv_data;
290 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
291 struct sh_mobile_ceu_dev *pcdev = ici->priv;
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 list_add_tail(&vb->queue, &pcdev->capture);
298
299 if (!pcdev->active) {
300 pcdev->active = vb;
301 sh_mobile_ceu_capture(pcdev);
302 }
303 }
304
305 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
306 struct videobuf_buffer *vb)
307 {
308 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
309 }
310
311 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
312 .buf_setup = sh_mobile_ceu_videobuf_setup,
313 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
314 .buf_queue = sh_mobile_ceu_videobuf_queue,
315 .buf_release = sh_mobile_ceu_videobuf_release,
316 };
317
318 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
319 {
320 struct sh_mobile_ceu_dev *pcdev = data;
321 struct videobuf_buffer *vb;
322 unsigned long flags;
323
324 spin_lock_irqsave(&pcdev->lock, flags);
325
326 vb = pcdev->active;
327 list_del_init(&vb->queue);
328
329 if (!list_empty(&pcdev->capture))
330 pcdev->active = list_entry(pcdev->capture.next,
331 struct videobuf_buffer, queue);
332 else
333 pcdev->active = NULL;
334
335 sh_mobile_ceu_capture(pcdev);
336
337 vb->state = VIDEOBUF_DONE;
338 do_gettimeofday(&vb->ts);
339 vb->field_count++;
340 wake_up(&vb->done);
341 spin_unlock_irqrestore(&pcdev->lock, flags);
342
343 return IRQ_HANDLED;
344 }
345
346 /* Called with .video_lock held */
347 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
348 {
349 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
350 struct sh_mobile_ceu_dev *pcdev = ici->priv;
351 int ret = -EBUSY;
352
353 if (pcdev->icd)
354 goto err;
355
356 dev_info(&icd->dev,
357 "SuperH Mobile CEU driver attached to camera %d\n",
358 icd->devnum);
359
360 ret = icd->ops->init(icd);
361 if (ret)
362 goto err;
363
364 clk_enable(pcdev->clk);
365
366 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
367 while (ceu_read(pcdev, CSTSR) & 1)
368 msleep(1);
369
370 pcdev->icd = icd;
371 err:
372 return ret;
373 }
374
375 /* Called with .video_lock held */
376 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
377 {
378 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
379 struct sh_mobile_ceu_dev *pcdev = ici->priv;
380 unsigned long flags;
381
382 BUG_ON(icd != pcdev->icd);
383
384 /* disable capture, disable interrupts */
385 ceu_write(pcdev, CEIER, 0);
386 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
387
388 /* make sure active buffer is canceled */
389 spin_lock_irqsave(&pcdev->lock, flags);
390 if (pcdev->active) {
391 list_del(&pcdev->active->queue);
392 pcdev->active->state = VIDEOBUF_ERROR;
393 wake_up_all(&pcdev->active->done);
394 pcdev->active = NULL;
395 }
396 spin_unlock_irqrestore(&pcdev->lock, flags);
397
398 clk_disable(pcdev->clk);
399
400 icd->ops->release(icd);
401
402 dev_info(&icd->dev,
403 "SuperH Mobile CEU driver detached from camera %d\n",
404 icd->devnum);
405
406 pcdev->icd = NULL;
407 }
408
409 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
410 __u32 pixfmt)
411 {
412 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
413 struct sh_mobile_ceu_dev *pcdev = ici->priv;
414 int ret, buswidth, width, height, cfszr_width, cdwdr_width;
415 unsigned long camera_flags, common_flags, value;
416 int yuv_mode, yuv_lineskip;
417
418 camera_flags = icd->ops->query_bus_param(icd);
419 common_flags = soc_camera_bus_param_compatible(camera_flags,
420 make_bus_param(pcdev));
421 if (!common_flags)
422 return -EINVAL;
423
424 ret = icd->ops->set_bus_param(icd, common_flags);
425 if (ret < 0)
426 return ret;
427
428 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
429 case SOCAM_DATAWIDTH_8:
430 buswidth = 8;
431 break;
432 case SOCAM_DATAWIDTH_16:
433 buswidth = 16;
434 break;
435 default:
436 return -EINVAL;
437 }
438
439 ceu_write(pcdev, CRCNTR, 0);
440 ceu_write(pcdev, CRCMPR, 0);
441
442 value = 0x00000010; /* data fetch by default */
443 yuv_mode = yuv_lineskip = 0;
444
445 switch (icd->current_fmt->fourcc) {
446 case V4L2_PIX_FMT_NV12:
447 case V4L2_PIX_FMT_NV21:
448 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
449 /* fall-through */
450 case V4L2_PIX_FMT_NV16:
451 case V4L2_PIX_FMT_NV61:
452 yuv_mode = 1;
453 switch (pcdev->camera_fmt->fourcc) {
454 case V4L2_PIX_FMT_UYVY:
455 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
456 break;
457 case V4L2_PIX_FMT_VYUY:
458 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
459 break;
460 case V4L2_PIX_FMT_YUYV:
461 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
462 break;
463 case V4L2_PIX_FMT_YVYU:
464 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
465 break;
466 default:
467 BUG();
468 }
469 }
470
471 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
472 icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
473 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
474
475 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
476 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
477 value |= buswidth == 16 ? 1 << 12 : 0;
478 ceu_write(pcdev, CAMCR, value);
479
480 ceu_write(pcdev, CAPCR, 0x00300000);
481 ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
482
483 mdelay(1);
484
485 if (yuv_mode) {
486 width = icd->width * 2;
487 width = buswidth == 16 ? width / 2 : width;
488 cfszr_width = cdwdr_width = icd->width;
489 } else {
490 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
491 width = buswidth == 16 ? width / 2 : width;
492 cfszr_width = buswidth == 8 ? width / 2 : width;
493 cdwdr_width = buswidth == 16 ? width * 2 : width;
494 }
495
496 height = icd->height;
497 if (pcdev->is_interlaced) {
498 height /= 2;
499 cdwdr_width *= 2;
500 }
501
502 ceu_write(pcdev, CAMOR, 0);
503 ceu_write(pcdev, CAPWR, (height << 16) | width);
504 ceu_write(pcdev, CFLCR, 0); /* no scaling */
505 ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
506 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
507
508 /* A few words about byte order (observed in Big Endian mode)
509 *
510 * In data fetch mode bytes are received in chunks of 8 bytes.
511 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
512 *
513 * The data is however by default written to memory in reverse order:
514 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
515 *
516 * The lowest three bits of CDOCR allows us to do swapping,
517 * using 7 we swap the data bytes to match the incoming order:
518 * D0, D1, D2, D3, D4, D5, D6, D7
519 */
520 value = 0x00000017;
521 if (yuv_lineskip)
522 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
523
524 ceu_write(pcdev, CDOCR, value);
525
526 ceu_write(pcdev, CDWDR, cdwdr_width);
527 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
528
529 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
530 return 0;
531 }
532
533 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
534 {
535 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
536 struct sh_mobile_ceu_dev *pcdev = ici->priv;
537 unsigned long camera_flags, common_flags;
538
539 camera_flags = icd->ops->query_bus_param(icd);
540 common_flags = soc_camera_bus_param_compatible(camera_flags,
541 make_bus_param(pcdev));
542 if (!common_flags)
543 return -EINVAL;
544
545 return 0;
546 }
547
548 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
549 {
550 .name = "NV12",
551 .depth = 12,
552 .fourcc = V4L2_PIX_FMT_NV12,
553 .colorspace = V4L2_COLORSPACE_JPEG,
554 },
555 {
556 .name = "NV21",
557 .depth = 12,
558 .fourcc = V4L2_PIX_FMT_NV21,
559 .colorspace = V4L2_COLORSPACE_JPEG,
560 },
561 {
562 .name = "NV16",
563 .depth = 16,
564 .fourcc = V4L2_PIX_FMT_NV16,
565 .colorspace = V4L2_COLORSPACE_JPEG,
566 },
567 {
568 .name = "NV61",
569 .depth = 16,
570 .fourcc = V4L2_PIX_FMT_NV61,
571 .colorspace = V4L2_COLORSPACE_JPEG,
572 },
573 };
574
575 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
576 struct soc_camera_format_xlate *xlate)
577 {
578 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
579 int ret, k, n;
580 int formats = 0;
581
582 ret = sh_mobile_ceu_try_bus_param(icd);
583 if (ret < 0)
584 return 0;
585
586 /* Beginning of a pass */
587 if (!idx)
588 icd->host_priv = NULL;
589
590 switch (icd->formats[idx].fourcc) {
591 case V4L2_PIX_FMT_UYVY:
592 case V4L2_PIX_FMT_VYUY:
593 case V4L2_PIX_FMT_YUYV:
594 case V4L2_PIX_FMT_YVYU:
595 if (icd->host_priv)
596 goto add_single_format;
597
598 /*
599 * Our case is simple so far: for any of the above four camera
600 * formats we add all our four synthesized NV* formats, so,
601 * just marking the device with a single flag suffices. If
602 * the format generation rules are more complex, you would have
603 * to actually hang your already added / counted formats onto
604 * the host_priv pointer and check whether the format you're
605 * going to add now is already there.
606 */
607 icd->host_priv = (void *)sh_mobile_ceu_formats;
608
609 n = ARRAY_SIZE(sh_mobile_ceu_formats);
610 formats += n;
611 for (k = 0; xlate && k < n; k++) {
612 xlate->host_fmt = &sh_mobile_ceu_formats[k];
613 xlate->cam_fmt = icd->formats + idx;
614 xlate->buswidth = icd->formats[idx].depth;
615 xlate++;
616 dev_dbg(ici->dev, "Providing format %s using %s\n",
617 sh_mobile_ceu_formats[k].name,
618 icd->formats[idx].name);
619 }
620 default:
621 add_single_format:
622 /* Generic pass-through */
623 formats++;
624 if (xlate) {
625 xlate->host_fmt = icd->formats + idx;
626 xlate->cam_fmt = icd->formats + idx;
627 xlate->buswidth = icd->formats[idx].depth;
628 xlate++;
629 dev_dbg(ici->dev,
630 "Providing format %s in pass-through mode\n",
631 icd->formats[idx].name);
632 }
633 }
634
635 return formats;
636 }
637
638 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
639 struct v4l2_rect *rect)
640 {
641 return icd->ops->set_crop(icd, rect);
642 }
643
644 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
645 struct v4l2_format *f)
646 {
647 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
648 struct sh_mobile_ceu_dev *pcdev = ici->priv;
649 __u32 pixfmt = f->fmt.pix.pixelformat;
650 const struct soc_camera_format_xlate *xlate;
651 struct v4l2_format cam_f = *f;
652 int ret;
653
654 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
655 if (!xlate) {
656 dev_warn(ici->dev, "Format %x not found\n", pixfmt);
657 return -EINVAL;
658 }
659
660 cam_f.fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
661 ret = icd->ops->set_fmt(icd, &cam_f);
662
663 if (!ret) {
664 icd->buswidth = xlate->buswidth;
665 icd->current_fmt = xlate->host_fmt;
666 pcdev->camera_fmt = xlate->cam_fmt;
667 }
668
669 return ret;
670 }
671
672 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
673 struct v4l2_format *f)
674 {
675 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
676 struct sh_mobile_ceu_dev *pcdev = ici->priv;
677 const struct soc_camera_format_xlate *xlate;
678 __u32 pixfmt = f->fmt.pix.pixelformat;
679 int ret;
680
681 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
682 if (!xlate) {
683 dev_warn(ici->dev, "Format %x not found\n", pixfmt);
684 return -EINVAL;
685 }
686
687 /* FIXME: calculate using depth and bus width */
688
689 v4l_bound_align_image(&f->fmt.pix.width, 2, 2560, 1,
690 &f->fmt.pix.height, 4, 1920, 2, 0);
691
692 f->fmt.pix.bytesperline = f->fmt.pix.width *
693 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
694 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
695
696 /* limit to sensor capabilities */
697 ret = icd->ops->try_fmt(icd, f);
698 if (ret < 0)
699 return ret;
700
701 switch (f->fmt.pix.field) {
702 case V4L2_FIELD_INTERLACED:
703 pcdev->is_interlaced = 1;
704 break;
705 case V4L2_FIELD_ANY:
706 f->fmt.pix.field = V4L2_FIELD_NONE;
707 /* fall-through */
708 case V4L2_FIELD_NONE:
709 pcdev->is_interlaced = 0;
710 break;
711 default:
712 ret = -EINVAL;
713 break;
714 }
715
716 return ret;
717 }
718
719 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
720 struct v4l2_requestbuffers *p)
721 {
722 int i;
723
724 /* This is for locking debugging only. I removed spinlocks and now I
725 * check whether .prepare is ever called on a linked buffer, or whether
726 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
727 * it hadn't triggered */
728 for (i = 0; i < p->count; i++) {
729 struct sh_mobile_ceu_buffer *buf;
730
731 buf = container_of(icf->vb_vidq.bufs[i],
732 struct sh_mobile_ceu_buffer, vb);
733 INIT_LIST_HEAD(&buf->vb.queue);
734 }
735
736 return 0;
737 }
738
739 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
740 {
741 struct soc_camera_file *icf = file->private_data;
742 struct sh_mobile_ceu_buffer *buf;
743
744 buf = list_entry(icf->vb_vidq.stream.next,
745 struct sh_mobile_ceu_buffer, vb.stream);
746
747 poll_wait(file, &buf->vb.done, pt);
748
749 if (buf->vb.state == VIDEOBUF_DONE ||
750 buf->vb.state == VIDEOBUF_ERROR)
751 return POLLIN|POLLRDNORM;
752
753 return 0;
754 }
755
756 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
757 struct v4l2_capability *cap)
758 {
759 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
760 cap->version = KERNEL_VERSION(0, 0, 5);
761 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
762 return 0;
763 }
764
765 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
766 struct soc_camera_device *icd)
767 {
768 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
769 struct sh_mobile_ceu_dev *pcdev = ici->priv;
770
771 videobuf_queue_dma_contig_init(q,
772 &sh_mobile_ceu_videobuf_ops,
773 ici->dev, &pcdev->lock,
774 V4L2_BUF_TYPE_VIDEO_CAPTURE,
775 pcdev->is_interlaced ?
776 V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
777 sizeof(struct sh_mobile_ceu_buffer),
778 icd);
779 }
780
781 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
782 .owner = THIS_MODULE,
783 .add = sh_mobile_ceu_add_device,
784 .remove = sh_mobile_ceu_remove_device,
785 .get_formats = sh_mobile_ceu_get_formats,
786 .set_crop = sh_mobile_ceu_set_crop,
787 .set_fmt = sh_mobile_ceu_set_fmt,
788 .try_fmt = sh_mobile_ceu_try_fmt,
789 .reqbufs = sh_mobile_ceu_reqbufs,
790 .poll = sh_mobile_ceu_poll,
791 .querycap = sh_mobile_ceu_querycap,
792 .set_bus_param = sh_mobile_ceu_set_bus_param,
793 .init_videobuf = sh_mobile_ceu_init_videobuf,
794 };
795
796 static int sh_mobile_ceu_probe(struct platform_device *pdev)
797 {
798 struct sh_mobile_ceu_dev *pcdev;
799 struct resource *res;
800 void __iomem *base;
801 char clk_name[8];
802 unsigned int irq;
803 int err = 0;
804
805 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
806 irq = platform_get_irq(pdev, 0);
807 if (!res || !irq) {
808 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
809 err = -ENODEV;
810 goto exit;
811 }
812
813 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
814 if (!pcdev) {
815 dev_err(&pdev->dev, "Could not allocate pcdev\n");
816 err = -ENOMEM;
817 goto exit;
818 }
819
820 INIT_LIST_HEAD(&pcdev->capture);
821 spin_lock_init(&pcdev->lock);
822
823 pcdev->pdata = pdev->dev.platform_data;
824 if (!pcdev->pdata) {
825 err = -EINVAL;
826 dev_err(&pdev->dev, "CEU platform data not set.\n");
827 goto exit_kfree;
828 }
829
830 base = ioremap_nocache(res->start, resource_size(res));
831 if (!base) {
832 err = -ENXIO;
833 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
834 goto exit_kfree;
835 }
836
837 pcdev->irq = irq;
838 pcdev->base = base;
839 pcdev->video_limit = 0; /* only enabled if second resource exists */
840
841 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
842 if (res) {
843 err = dma_declare_coherent_memory(&pdev->dev, res->start,
844 res->start,
845 resource_size(res),
846 DMA_MEMORY_MAP |
847 DMA_MEMORY_EXCLUSIVE);
848 if (!err) {
849 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
850 err = -ENXIO;
851 goto exit_iounmap;
852 }
853
854 pcdev->video_limit = resource_size(res);
855 }
856
857 /* request irq */
858 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
859 dev_name(&pdev->dev), pcdev);
860 if (err) {
861 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
862 goto exit_release_mem;
863 }
864
865 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
866 pcdev->clk = clk_get(&pdev->dev, clk_name);
867 if (IS_ERR(pcdev->clk)) {
868 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
869 err = PTR_ERR(pcdev->clk);
870 goto exit_free_irq;
871 }
872
873 pcdev->ici.priv = pcdev;
874 pcdev->ici.dev = &pdev->dev;
875 pcdev->ici.nr = pdev->id;
876 pcdev->ici.drv_name = dev_name(&pdev->dev);
877 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
878
879 err = soc_camera_host_register(&pcdev->ici);
880 if (err)
881 goto exit_free_clk;
882
883 return 0;
884
885 exit_free_clk:
886 clk_put(pcdev->clk);
887 exit_free_irq:
888 free_irq(pcdev->irq, pcdev);
889 exit_release_mem:
890 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
891 dma_release_declared_memory(&pdev->dev);
892 exit_iounmap:
893 iounmap(base);
894 exit_kfree:
895 kfree(pcdev);
896 exit:
897 return err;
898 }
899
900 static int sh_mobile_ceu_remove(struct platform_device *pdev)
901 {
902 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
903 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
904 struct sh_mobile_ceu_dev, ici);
905
906 soc_camera_host_unregister(soc_host);
907 clk_put(pcdev->clk);
908 free_irq(pcdev->irq, pcdev);
909 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
910 dma_release_declared_memory(&pdev->dev);
911 iounmap(pcdev->base);
912 kfree(pcdev);
913 return 0;
914 }
915
916 static struct platform_driver sh_mobile_ceu_driver = {
917 .driver = {
918 .name = "sh_mobile_ceu",
919 },
920 .probe = sh_mobile_ceu_probe,
921 .remove = sh_mobile_ceu_remove,
922 };
923
924 static int __init sh_mobile_ceu_init(void)
925 {
926 return platform_driver_register(&sh_mobile_ceu_driver);
927 }
928
929 static void __exit sh_mobile_ceu_exit(void)
930 {
931 platform_driver_unregister(&sh_mobile_ceu_driver);
932 }
933
934 module_init(sh_mobile_ceu_init);
935 module_exit(sh_mobile_ceu_exit);
936
937 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
938 MODULE_AUTHOR("Magnus Damm");
939 MODULE_LICENSE("GPL");
Verdex Pro support