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V4L/DVB (11608): soc-camera: host-driver cleanup
[linux-2.6/mini2440.git] / drivers / media / video / sh_mobile_ceu_camera.c
blob8e4a8fca976c6d323a0d3dc9b11a3273c74cef00
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_interlaced;
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_waiton(&buf->vb, 0, 0);
178 videobuf_dma_contig_free(vq, &buf->vb);
179 dev_dbg(&icd->dev, "%s freed\n", __func__);
180 buf->vb.state = VIDEOBUF_NEEDS_INIT;
181 }
182
183 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
184 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
185 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
186 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
187
188
189 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
190 {
191 struct soc_camera_device *icd = pcdev->icd;
192 dma_addr_t phys_addr_top, phys_addr_bottom;
193
194 /* The hardware is _very_ picky about this sequence. Especially
195 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
196 * several not-so-well documented interrupt sources in CETCR.
197 */
198 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
199 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
200 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
201 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
202 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
203
204 if (!pcdev->active)
205 return;
206
207 phys_addr_top = videobuf_to_dma_contig(pcdev->active);
208 ceu_write(pcdev, CDAYR, phys_addr_top);
209 if (pcdev->is_interlaced) {
210 phys_addr_bottom = phys_addr_top + icd->width;
211 ceu_write(pcdev, CDBYR, phys_addr_bottom);
212 }
213
214 switch (icd->current_fmt->fourcc) {
215 case V4L2_PIX_FMT_NV12:
216 case V4L2_PIX_FMT_NV21:
217 case V4L2_PIX_FMT_NV16:
218 case V4L2_PIX_FMT_NV61:
219 phys_addr_top += icd->width * icd->height;
220 ceu_write(pcdev, CDACR, phys_addr_top);
221 if (pcdev->is_interlaced) {
222 phys_addr_bottom = phys_addr_top + icd->width;
223 ceu_write(pcdev, CDBCR, phys_addr_bottom);
224 }
225 }
226
227 pcdev->active->state = VIDEOBUF_ACTIVE;
228 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
229 }
230
231 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
232 struct videobuf_buffer *vb,
233 enum v4l2_field field)
234 {
235 struct soc_camera_device *icd = vq->priv_data;
236 struct sh_mobile_ceu_buffer *buf;
237 int ret;
238
239 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
240
241 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
242 vb, vb->baddr, vb->bsize);
243
244 /* Added list head initialization on alloc */
245 WARN_ON(!list_empty(&vb->queue));
246
247 #ifdef DEBUG
248 /* This can be useful if you want to see if we actually fill
249 * the buffer with something */
250 memset((void *)vb->baddr, 0xaa, vb->bsize);
251 #endif
252
253 BUG_ON(NULL == icd->current_fmt);
254
255 if (buf->fmt != icd->current_fmt ||
256 vb->width != icd->width ||
257 vb->height != icd->height ||
258 vb->field != field) {
259 buf->fmt = icd->current_fmt;
260 vb->width = icd->width;
261 vb->height = icd->height;
262 vb->field = field;
263 vb->state = VIDEOBUF_NEEDS_INIT;
264 }
265
266 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
267 if (0 != vb->baddr && vb->bsize < vb->size) {
268 ret = -EINVAL;
269 goto out;
270 }
271
272 if (vb->state == VIDEOBUF_NEEDS_INIT) {
273 ret = videobuf_iolock(vq, vb, NULL);
274 if (ret)
275 goto fail;
276 vb->state = VIDEOBUF_PREPARED;
277 }
278
279 return 0;
280 fail:
281 free_buffer(vq, buf);
282 out:
283 return ret;
284 }
285
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 unsigned long flags;
293
294 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
295 vb, vb->baddr, vb->bsize);
296
297 vb->state = VIDEOBUF_QUEUED;
298 spin_lock_irqsave(&pcdev->lock, flags);
299 list_add_tail(&vb->queue, &pcdev->capture);
300
301 if (!pcdev->active) {
302 pcdev->active = vb;
303 sh_mobile_ceu_capture(pcdev);
304 }
305
306 spin_unlock_irqrestore(&pcdev->lock, flags);
307 }
308
309 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
310 struct videobuf_buffer *vb)
311 {
312 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
313 }
314
315 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
316 .buf_setup = sh_mobile_ceu_videobuf_setup,
317 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
318 .buf_queue = sh_mobile_ceu_videobuf_queue,
319 .buf_release = sh_mobile_ceu_videobuf_release,
320 };
321
322 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
323 {
324 struct sh_mobile_ceu_dev *pcdev = data;
325 struct videobuf_buffer *vb;
326 unsigned long flags;
327
328 spin_lock_irqsave(&pcdev->lock, flags);
329
330 vb = pcdev->active;
331 list_del_init(&vb->queue);
332
333 if (!list_empty(&pcdev->capture))
334 pcdev->active = list_entry(pcdev->capture.next,
335 struct videobuf_buffer, queue);
336 else
337 pcdev->active = NULL;
338
339 sh_mobile_ceu_capture(pcdev);
340
341 vb->state = VIDEOBUF_DONE;
342 do_gettimeofday(&vb->ts);
343 vb->field_count++;
344 wake_up(&vb->done);
345 spin_unlock_irqrestore(&pcdev->lock, flags);
346
347 return IRQ_HANDLED;
348 }
349
350 /* Called with .video_lock held */
351 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
352 {
353 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
354 struct sh_mobile_ceu_dev *pcdev = ici->priv;
355 int ret = -EBUSY;
356
357 if (pcdev->icd)
358 goto err;
359
360 dev_info(&icd->dev,
361 "SuperH Mobile CEU driver attached to camera %d\n",
362 icd->devnum);
363
364 ret = icd->ops->init(icd);
365 if (ret)
366 goto err;
367
368 clk_enable(pcdev->clk);
369
370 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
371 while (ceu_read(pcdev, CSTSR) & 1)
372 msleep(1);
373
374 pcdev->icd = icd;
375 err:
376 return ret;
377 }
378
379 /* Called with .video_lock held */
380 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
381 {
382 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
383 struct sh_mobile_ceu_dev *pcdev = ici->priv;
384 unsigned long flags;
385
386 BUG_ON(icd != pcdev->icd);
387
388 /* disable capture, disable interrupts */
389 ceu_write(pcdev, CEIER, 0);
390 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
391
392 /* make sure active buffer is canceled */
393 spin_lock_irqsave(&pcdev->lock, flags);
394 if (pcdev->active) {
395 list_del(&pcdev->active->queue);
396 pcdev->active->state = VIDEOBUF_ERROR;
397 wake_up_all(&pcdev->active->done);
398 pcdev->active = NULL;
399 }
400 spin_unlock_irqrestore(&pcdev->lock, flags);
401
402 clk_disable(pcdev->clk);
403
404 icd->ops->release(icd);
405
406 dev_info(&icd->dev,
407 "SuperH Mobile CEU driver detached from camera %d\n",
408 icd->devnum);
409
410 pcdev->icd = NULL;
411 }
412
413 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
414 __u32 pixfmt)
415 {
416 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
417 struct sh_mobile_ceu_dev *pcdev = ici->priv;
418 int ret, buswidth, width, height, cfszr_width, cdwdr_width;
419 unsigned long camera_flags, common_flags, value;
420 int yuv_mode, yuv_lineskip;
421
422 camera_flags = icd->ops->query_bus_param(icd);
423 common_flags = soc_camera_bus_param_compatible(camera_flags,
424 make_bus_param(pcdev));
425 if (!common_flags)
426 return -EINVAL;
427
428 ret = icd->ops->set_bus_param(icd, common_flags);
429 if (ret < 0)
430 return ret;
431
432 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
433 case SOCAM_DATAWIDTH_8:
434 buswidth = 8;
435 break;
436 case SOCAM_DATAWIDTH_16:
437 buswidth = 16;
438 break;
439 default:
440 return -EINVAL;
441 }
442
443 ceu_write(pcdev, CRCNTR, 0);
444 ceu_write(pcdev, CRCMPR, 0);
445
446 value = 0x00000010; /* data fetch by default */
447 yuv_mode = yuv_lineskip = 0;
448
449 switch (icd->current_fmt->fourcc) {
450 case V4L2_PIX_FMT_NV12:
451 case V4L2_PIX_FMT_NV21:
452 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
453 /* fall-through */
454 case V4L2_PIX_FMT_NV16:
455 case V4L2_PIX_FMT_NV61:
456 yuv_mode = 1;
457 switch (pcdev->camera_fmt->fourcc) {
458 case V4L2_PIX_FMT_UYVY:
459 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
460 break;
461 case V4L2_PIX_FMT_VYUY:
462 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
463 break;
464 case V4L2_PIX_FMT_YUYV:
465 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
466 break;
467 case V4L2_PIX_FMT_YVYU:
468 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
469 break;
470 default:
471 BUG();
472 }
473 }
474
475 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
476 icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
477 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
478
479 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
480 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
481 value |= buswidth == 16 ? 1 << 12 : 0;
482 ceu_write(pcdev, CAMCR, value);
483
484 ceu_write(pcdev, CAPCR, 0x00300000);
485 ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
486
487 mdelay(1);
488
489 if (yuv_mode) {
490 width = icd->width * 2;
491 width = buswidth == 16 ? width / 2 : width;
492 cfszr_width = cdwdr_width = icd->width;
493 } else {
494 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
495 width = buswidth == 16 ? width / 2 : width;
496 cfszr_width = buswidth == 8 ? width / 2 : width;
497 cdwdr_width = buswidth == 16 ? width * 2 : width;
498 }
499
500 height = icd->height;
501 if (pcdev->is_interlaced) {
502 height /= 2;
503 cdwdr_width *= 2;
504 }
505
506 ceu_write(pcdev, CAMOR, 0);
507 ceu_write(pcdev, CAPWR, (height << 16) | width);
508 ceu_write(pcdev, CFLCR, 0); /* no scaling */
509 ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
510 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
511
512 /* A few words about byte order (observed in Big Endian mode)
513 *
514 * In data fetch mode bytes are received in chunks of 8 bytes.
515 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
516 *
517 * The data is however by default written to memory in reverse order:
518 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
519 *
520 * The lowest three bits of CDOCR allows us to do swapping,
521 * using 7 we swap the data bytes to match the incoming order:
522 * D0, D1, D2, D3, D4, D5, D6, D7
523 */
524 value = 0x00000017;
525 if (yuv_lineskip)
526 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
527
528 ceu_write(pcdev, CDOCR, value);
529
530 ceu_write(pcdev, CDWDR, cdwdr_width);
531 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
532
533 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
534 return 0;
535 }
536
537 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
538 {
539 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
540 struct sh_mobile_ceu_dev *pcdev = ici->priv;
541 unsigned long camera_flags, common_flags;
542
543 camera_flags = icd->ops->query_bus_param(icd);
544 common_flags = soc_camera_bus_param_compatible(camera_flags,
545 make_bus_param(pcdev));
546 if (!common_flags)
547 return -EINVAL;
548
549 return 0;
550 }
551
552 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
553 {
554 .name = "NV12",
555 .depth = 12,
556 .fourcc = V4L2_PIX_FMT_NV12,
557 .colorspace = V4L2_COLORSPACE_JPEG,
558 },
559 {
560 .name = "NV21",
561 .depth = 12,
562 .fourcc = V4L2_PIX_FMT_NV21,
563 .colorspace = V4L2_COLORSPACE_JPEG,
564 },
565 {
566 .name = "NV16",
567 .depth = 16,
568 .fourcc = V4L2_PIX_FMT_NV16,
569 .colorspace = V4L2_COLORSPACE_JPEG,
570 },
571 {
572 .name = "NV61",
573 .depth = 16,
574 .fourcc = V4L2_PIX_FMT_NV61,
575 .colorspace = V4L2_COLORSPACE_JPEG,
576 },
577 };
578
579 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
580 struct soc_camera_format_xlate *xlate)
581 {
582 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
583 int ret, k, n;
584 int formats = 0;
585
586 ret = sh_mobile_ceu_try_bus_param(icd);
587 if (ret < 0)
588 return 0;
589
590 /* Beginning of a pass */
591 if (!idx)
592 icd->host_priv = NULL;
593
594 switch (icd->formats[idx].fourcc) {
595 case V4L2_PIX_FMT_UYVY:
596 case V4L2_PIX_FMT_VYUY:
597 case V4L2_PIX_FMT_YUYV:
598 case V4L2_PIX_FMT_YVYU:
599 if (icd->host_priv)
600 goto add_single_format;
601
602 /*
603 * Our case is simple so far: for any of the above four camera
604 * formats we add all our four synthesized NV* formats, so,
605 * just marking the device with a single flag suffices. If
606 * the format generation rules are more complex, you would have
607 * to actually hang your already added / counted formats onto
608 * the host_priv pointer and check whether the format you're
609 * going to add now is already there.
610 */
611 icd->host_priv = (void *)sh_mobile_ceu_formats;
612
613 n = ARRAY_SIZE(sh_mobile_ceu_formats);
614 formats += n;
615 for (k = 0; xlate && k < n; k++) {
616 xlate->host_fmt = &sh_mobile_ceu_formats[k];
617 xlate->cam_fmt = icd->formats + idx;
618 xlate->buswidth = icd->formats[idx].depth;
619 xlate++;
620 dev_dbg(&ici->dev, "Providing format %s using %s\n",
621 sh_mobile_ceu_formats[k].name,
622 icd->formats[idx].name);
623 }
624 default:
625 add_single_format:
626 /* Generic pass-through */
627 formats++;
628 if (xlate) {
629 xlate->host_fmt = icd->formats + idx;
630 xlate->cam_fmt = icd->formats + idx;
631 xlate->buswidth = icd->formats[idx].depth;
632 xlate++;
633 dev_dbg(&ici->dev,
634 "Providing format %s in pass-through mode\n",
635 icd->formats[idx].name);
636 }
637 }
638
639 return formats;
640 }
641
642 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
643 struct v4l2_rect *rect)
644 {
645 return icd->ops->set_crop(icd, rect);
646 }
647
648 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
649 struct v4l2_format *f)
650 {
651 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
652 struct sh_mobile_ceu_dev *pcdev = ici->priv;
653 __u32 pixfmt = f->fmt.pix.pixelformat;
654 const struct soc_camera_format_xlate *xlate;
655 struct v4l2_format cam_f = *f;
656 int ret;
657
658 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
659 if (!xlate) {
660 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
661 return -EINVAL;
662 }
663
664 cam_f.fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
665 ret = icd->ops->set_fmt(icd, &cam_f);
666
667 if (!ret) {
668 icd->buswidth = xlate->buswidth;
669 icd->current_fmt = xlate->host_fmt;
670 pcdev->camera_fmt = xlate->cam_fmt;
671 }
672
673 return ret;
674 }
675
676 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
677 struct v4l2_format *f)
678 {
679 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
680 struct sh_mobile_ceu_dev *pcdev = ici->priv;
681 const struct soc_camera_format_xlate *xlate;
682 __u32 pixfmt = f->fmt.pix.pixelformat;
683 int ret;
684
685 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
686 if (!xlate) {
687 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
688 return -EINVAL;
689 }
690
691 /* FIXME: calculate using depth and bus width */
692
693 if (f->fmt.pix.height < 4)
694 f->fmt.pix.height = 4;
695 if (f->fmt.pix.height > 1920)
696 f->fmt.pix.height = 1920;
697 if (f->fmt.pix.width < 2)
698 f->fmt.pix.width = 2;
699 if (f->fmt.pix.width > 2560)
700 f->fmt.pix.width = 2560;
701 f->fmt.pix.width &= ~0x01;
702 f->fmt.pix.height &= ~0x03;
703
704 f->fmt.pix.bytesperline = f->fmt.pix.width *
705 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
706 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
707
708 /* limit to sensor capabilities */
709 ret = icd->ops->try_fmt(icd, f);
710 if (ret < 0)
711 return ret;
712
713 switch (f->fmt.pix.field) {
714 case V4L2_FIELD_INTERLACED:
715 pcdev->is_interlaced = 1;
716 break;
717 case V4L2_FIELD_ANY:
718 f->fmt.pix.field = V4L2_FIELD_NONE;
719 /* fall-through */
720 case V4L2_FIELD_NONE:
721 pcdev->is_interlaced = 0;
722 break;
723 default:
724 ret = -EINVAL;
725 break;
726 }
727
728 return ret;
729 }
730
731 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
732 struct v4l2_requestbuffers *p)
733 {
734 int i;
735
736 /* This is for locking debugging only. I removed spinlocks and now I
737 * check whether .prepare is ever called on a linked buffer, or whether
738 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
739 * it hadn't triggered */
740 for (i = 0; i < p->count; i++) {
741 struct sh_mobile_ceu_buffer *buf;
742
743 buf = container_of(icf->vb_vidq.bufs[i],
744 struct sh_mobile_ceu_buffer, vb);
745 INIT_LIST_HEAD(&buf->vb.queue);
746 }
747
748 return 0;
749 }
750
751 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
752 {
753 struct soc_camera_file *icf = file->private_data;
754 struct sh_mobile_ceu_buffer *buf;
755
756 buf = list_entry(icf->vb_vidq.stream.next,
757 struct sh_mobile_ceu_buffer, vb.stream);
758
759 poll_wait(file, &buf->vb.done, pt);
760
761 if (buf->vb.state == VIDEOBUF_DONE ||
762 buf->vb.state == VIDEOBUF_ERROR)
763 return POLLIN|POLLRDNORM;
764
765 return 0;
766 }
767
768 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
769 struct v4l2_capability *cap)
770 {
771 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
772 cap->version = KERNEL_VERSION(0, 0, 5);
773 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
774 return 0;
775 }
776
777 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
778 struct soc_camera_device *icd)
779 {
780 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
781 struct sh_mobile_ceu_dev *pcdev = ici->priv;
782
783 videobuf_queue_dma_contig_init(q,
784 &sh_mobile_ceu_videobuf_ops,
785 &ici->dev, &pcdev->lock,
786 V4L2_BUF_TYPE_VIDEO_CAPTURE,
787 pcdev->is_interlaced ?
788 V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
789 sizeof(struct sh_mobile_ceu_buffer),
790 icd);
791 }
792
793 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
794 .owner = THIS_MODULE,
795 .add = sh_mobile_ceu_add_device,
796 .remove = sh_mobile_ceu_remove_device,
797 .get_formats = sh_mobile_ceu_get_formats,
798 .set_crop = sh_mobile_ceu_set_crop,
799 .set_fmt = sh_mobile_ceu_set_fmt,
800 .try_fmt = sh_mobile_ceu_try_fmt,
801 .reqbufs = sh_mobile_ceu_reqbufs,
802 .poll = sh_mobile_ceu_poll,
803 .querycap = sh_mobile_ceu_querycap,
804 .set_bus_param = sh_mobile_ceu_set_bus_param,
805 .init_videobuf = sh_mobile_ceu_init_videobuf,
806 };
807
808 static int sh_mobile_ceu_probe(struct platform_device *pdev)
809 {
810 struct sh_mobile_ceu_dev *pcdev;
811 struct resource *res;
812 void __iomem *base;
813 char clk_name[8];
814 unsigned int irq;
815 int err = 0;
816
817 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
818 irq = platform_get_irq(pdev, 0);
819 if (!res || !irq) {
820 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
821 err = -ENODEV;
822 goto exit;
823 }
824
825 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
826 if (!pcdev) {
827 dev_err(&pdev->dev, "Could not allocate pcdev\n");
828 err = -ENOMEM;
829 goto exit;
830 }
831
832 platform_set_drvdata(pdev, pcdev);
833 INIT_LIST_HEAD(&pcdev->capture);
834 spin_lock_init(&pcdev->lock);
835
836 pcdev->pdata = pdev->dev.platform_data;
837 if (!pcdev->pdata) {
838 err = -EINVAL;
839 dev_err(&pdev->dev, "CEU platform data not set.\n");
840 goto exit_kfree;
841 }
842
843 base = ioremap_nocache(res->start, resource_size(res));
844 if (!base) {
845 err = -ENXIO;
846 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
847 goto exit_kfree;
848 }
849
850 pcdev->irq = irq;
851 pcdev->base = base;
852 pcdev->video_limit = 0; /* only enabled if second resource exists */
853 pcdev->dev = &pdev->dev;
854
855 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
856 if (res) {
857 err = dma_declare_coherent_memory(&pdev->dev, res->start,
858 res->start,
859 resource_size(res),
860 DMA_MEMORY_MAP |
861 DMA_MEMORY_EXCLUSIVE);
862 if (!err) {
863 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
864 err = -ENXIO;
865 goto exit_iounmap;
866 }
867
868 pcdev->video_limit = resource_size(res);
869 }
870
871 /* request irq */
872 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
873 dev_name(&pdev->dev), pcdev);
874 if (err) {
875 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
876 goto exit_release_mem;
877 }
878
879 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
880 pcdev->clk = clk_get(&pdev->dev, clk_name);
881 if (IS_ERR(pcdev->clk)) {
882 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
883 err = PTR_ERR(pcdev->clk);
884 goto exit_free_irq;
885 }
886
887 pcdev->ici.priv = pcdev;
888 pcdev->ici.dev.parent = &pdev->dev;
889 pcdev->ici.nr = pdev->id;
890 pcdev->ici.drv_name = dev_name(&pdev->dev);
891 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
892
893 err = soc_camera_host_register(&pcdev->ici);
894 if (err)
895 goto exit_free_clk;
896
897 return 0;
898
899 exit_free_clk:
900 clk_put(pcdev->clk);
901 exit_free_irq:
902 free_irq(pcdev->irq, pcdev);
903 exit_release_mem:
904 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
905 dma_release_declared_memory(&pdev->dev);
906 exit_iounmap:
907 iounmap(base);
908 exit_kfree:
909 kfree(pcdev);
910 exit:
911 return err;
912 }
913
914 static int sh_mobile_ceu_remove(struct platform_device *pdev)
915 {
916 struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
917
918 soc_camera_host_unregister(&pcdev->ici);
919 clk_put(pcdev->clk);
920 free_irq(pcdev->irq, pcdev);
921 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
922 dma_release_declared_memory(&pdev->dev);
923 iounmap(pcdev->base);
924 kfree(pcdev);
925 return 0;
926 }
927
928 static struct platform_driver sh_mobile_ceu_driver = {
929 .driver = {
930 .name = "sh_mobile_ceu",
931 },
932 .probe = sh_mobile_ceu_probe,
933 .remove = sh_mobile_ceu_remove,
934 };
935
936 static int __init sh_mobile_ceu_init(void)
937 {
938 return platform_driver_register(&sh_mobile_ceu_driver);
939 }
940
941 static void __exit sh_mobile_ceu_exit(void)
942 {
943 platform_driver_unregister(&sh_mobile_ceu_driver);
944 }
945
946 module_init(sh_mobile_ceu_init);
947 module_exit(sh_mobile_ceu_exit);
948
949 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
950 MODULE_AUTHOR("Magnus Damm");
951 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards