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V4L/DVB (12506): soc-camera: convert to platform device
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / sh_mobile_ceu_camera.c
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/pm_runtime.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 unsigned long video_limit;
90
91 /* lock used to protect videobuf */
92 spinlock_t lock;
93 struct list_head capture;
94 struct videobuf_buffer *active;
95 int is_interlaced;
96
97 struct sh_mobile_ceu_info *pdata;
98
99 const struct soc_camera_data_format *camera_fmt;
100 };
101
102 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
103 {
104 unsigned long flags;
105
106 flags = SOCAM_MASTER |
107 SOCAM_PCLK_SAMPLE_RISING |
108 SOCAM_HSYNC_ACTIVE_HIGH |
109 SOCAM_HSYNC_ACTIVE_LOW |
110 SOCAM_VSYNC_ACTIVE_HIGH |
111 SOCAM_VSYNC_ACTIVE_LOW |
112 SOCAM_DATA_ACTIVE_HIGH;
113
114 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
115 flags |= SOCAM_DATAWIDTH_8;
116
117 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
118 flags |= SOCAM_DATAWIDTH_16;
119
120 if (flags & SOCAM_DATAWIDTH_MASK)
121 return flags;
122
123 return 0;
124 }
125
126 static void ceu_write(struct sh_mobile_ceu_dev *priv,
127 unsigned long reg_offs, u32 data)
128 {
129 iowrite32(data, priv->base + reg_offs);
130 }
131
132 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
133 {
134 return ioread32(priv->base + reg_offs);
135 }
136
137 /*
138 * Videobuf operations
139 */
140 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
141 unsigned int *count,
142 unsigned int *size)
143 {
144 struct soc_camera_device *icd = vq->priv_data;
145 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
146 struct sh_mobile_ceu_dev *pcdev = ici->priv;
147 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
148
149 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
150
151 if (0 == *count)
152 *count = 2;
153
154 if (pcdev->video_limit) {
155 while (*size * *count > pcdev->video_limit)
156 (*count)--;
157 }
158
159 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
160
161 return 0;
162 }
163
164 static void free_buffer(struct videobuf_queue *vq,
165 struct sh_mobile_ceu_buffer *buf)
166 {
167 struct soc_camera_device *icd = vq->priv_data;
168
169 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
170 &buf->vb, buf->vb.baddr, buf->vb.bsize);
171
172 if (in_interrupt())
173 BUG();
174
175 videobuf_waiton(&buf->vb, 0, 0);
176 videobuf_dma_contig_free(vq, &buf->vb);
177 dev_dbg(&icd->dev, "%s freed\n", __func__);
178 buf->vb.state = VIDEOBUF_NEEDS_INIT;
179 }
180
181 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
182 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
183 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
184 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
185
186
187 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
188 {
189 struct soc_camera_device *icd = pcdev->icd;
190 dma_addr_t phys_addr_top, phys_addr_bottom;
191
192 /* The hardware is _very_ picky about this sequence. Especially
193 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
194 * several not-so-well documented interrupt sources in CETCR.
195 */
196 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
197 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
198 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
199 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
200 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
201
202 if (!pcdev->active)
203 return;
204
205 phys_addr_top = videobuf_to_dma_contig(pcdev->active);
206 ceu_write(pcdev, CDAYR, phys_addr_top);
207 if (pcdev->is_interlaced) {
208 phys_addr_bottom = phys_addr_top + icd->width;
209 ceu_write(pcdev, CDBYR, phys_addr_bottom);
210 }
211
212 switch (icd->current_fmt->fourcc) {
213 case V4L2_PIX_FMT_NV12:
214 case V4L2_PIX_FMT_NV21:
215 case V4L2_PIX_FMT_NV16:
216 case V4L2_PIX_FMT_NV61:
217 phys_addr_top += icd->width * icd->height;
218 ceu_write(pcdev, CDACR, phys_addr_top);
219 if (pcdev->is_interlaced) {
220 phys_addr_bottom = phys_addr_top + icd->width;
221 ceu_write(pcdev, CDBCR, phys_addr_bottom);
222 }
223 }
224
225 pcdev->active->state = VIDEOBUF_ACTIVE;
226 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
227 }
228
229 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
230 struct videobuf_buffer *vb,
231 enum v4l2_field field)
232 {
233 struct soc_camera_device *icd = vq->priv_data;
234 struct sh_mobile_ceu_buffer *buf;
235 int ret;
236
237 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
238
239 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
240 vb, vb->baddr, vb->bsize);
241
242 /* Added list head initialization on alloc */
243 WARN_ON(!list_empty(&vb->queue));
244
245 #ifdef DEBUG
246 /* This can be useful if you want to see if we actually fill
247 * the buffer with something */
248 memset((void *)vb->baddr, 0xaa, vb->bsize);
249 #endif
250
251 BUG_ON(NULL == icd->current_fmt);
252
253 if (buf->fmt != icd->current_fmt ||
254 vb->width != icd->width ||
255 vb->height != icd->height ||
256 vb->field != field) {
257 buf->fmt = icd->current_fmt;
258 vb->width = icd->width;
259 vb->height = icd->height;
260 vb->field = field;
261 vb->state = VIDEOBUF_NEEDS_INIT;
262 }
263
264 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
265 if (0 != vb->baddr && vb->bsize < vb->size) {
266 ret = -EINVAL;
267 goto out;
268 }
269
270 if (vb->state == VIDEOBUF_NEEDS_INIT) {
271 ret = videobuf_iolock(vq, vb, NULL);
272 if (ret)
273 goto fail;
274 vb->state = VIDEOBUF_PREPARED;
275 }
276
277 return 0;
278 fail:
279 free_buffer(vq, buf);
280 out:
281 return ret;
282 }
283
284 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
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
292 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
293 vb, vb->baddr, vb->bsize);
294
295 vb->state = VIDEOBUF_QUEUED;
296 list_add_tail(&vb->queue, &pcdev->capture);
297
298 if (!pcdev->active) {
299 pcdev->active = vb;
300 sh_mobile_ceu_capture(pcdev);
301 }
302 }
303
304 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
305 struct videobuf_buffer *vb)
306 {
307 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
308 }
309
310 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
311 .buf_setup = sh_mobile_ceu_videobuf_setup,
312 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
313 .buf_queue = sh_mobile_ceu_videobuf_queue,
314 .buf_release = sh_mobile_ceu_videobuf_release,
315 };
316
317 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
318 {
319 struct sh_mobile_ceu_dev *pcdev = data;
320 struct videobuf_buffer *vb;
321 unsigned long flags;
322
323 spin_lock_irqsave(&pcdev->lock, flags);
324
325 vb = pcdev->active;
326 list_del_init(&vb->queue);
327
328 if (!list_empty(&pcdev->capture))
329 pcdev->active = list_entry(pcdev->capture.next,
330 struct videobuf_buffer, queue);
331 else
332 pcdev->active = NULL;
333
334 sh_mobile_ceu_capture(pcdev);
335
336 vb->state = VIDEOBUF_DONE;
337 do_gettimeofday(&vb->ts);
338 vb->field_count++;
339 wake_up(&vb->done);
340 spin_unlock_irqrestore(&pcdev->lock, flags);
341
342 return IRQ_HANDLED;
343 }
344
345 /* Called with .video_lock held */
346 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
347 {
348 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
349 struct sh_mobile_ceu_dev *pcdev = ici->priv;
350 int ret = -EBUSY;
351
352 if (pcdev->icd)
353 goto err;
354
355 dev_info(&icd->dev,
356 "SuperH Mobile CEU driver attached to camera %d\n",
357 icd->devnum);
358
359 clk_enable(pcdev->clk);
360
361 ret = icd->ops->init(icd);
362 if (ret) {
363 clk_disable(pcdev->clk);
364 goto err;
365 }
366
367 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
368 while (ceu_read(pcdev, CSTSR) & 1)
369 msleep(1);
370
371 pcdev->icd = icd;
372 err:
373 return ret;
374 }
375
376 /* Called with .video_lock held */
377 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
378 {
379 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
380 struct sh_mobile_ceu_dev *pcdev = ici->priv;
381 unsigned long flags;
382
383 BUG_ON(icd != pcdev->icd);
384
385 /* disable capture, disable interrupts */
386 ceu_write(pcdev, CEIER, 0);
387 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
388
389 /* make sure active buffer is canceled */
390 spin_lock_irqsave(&pcdev->lock, flags);
391 if (pcdev->active) {
392 list_del(&pcdev->active->queue);
393 pcdev->active->state = VIDEOBUF_ERROR;
394 wake_up_all(&pcdev->active->done);
395 pcdev->active = NULL;
396 }
397 spin_unlock_irqrestore(&pcdev->lock, flags);
398
399 icd->ops->release(icd);
400
401 clk_disable(pcdev->clk);
402
403 dev_info(&icd->dev,
404 "SuperH Mobile CEU driver detached from camera %d\n",
405 icd->devnum);
406
407 pcdev->icd = NULL;
408 }
409
410 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
411 __u32 pixfmt)
412 {
413 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
414 struct sh_mobile_ceu_dev *pcdev = ici->priv;
415 int ret, buswidth, width, height, cfszr_width, cdwdr_width;
416 unsigned long camera_flags, common_flags, value;
417 int yuv_mode, yuv_lineskip;
418
419 camera_flags = icd->ops->query_bus_param(icd);
420 common_flags = soc_camera_bus_param_compatible(camera_flags,
421 make_bus_param(pcdev));
422 if (!common_flags)
423 return -EINVAL;
424
425 ret = icd->ops->set_bus_param(icd, common_flags);
426 if (ret < 0)
427 return ret;
428
429 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
430 case SOCAM_DATAWIDTH_8:
431 buswidth = 8;
432 break;
433 case SOCAM_DATAWIDTH_16:
434 buswidth = 16;
435 break;
436 default:
437 return -EINVAL;
438 }
439
440 ceu_write(pcdev, CRCNTR, 0);
441 ceu_write(pcdev, CRCMPR, 0);
442
443 value = 0x00000010; /* data fetch by default */
444 yuv_mode = yuv_lineskip = 0;
445
446 switch (icd->current_fmt->fourcc) {
447 case V4L2_PIX_FMT_NV12:
448 case V4L2_PIX_FMT_NV21:
449 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
450 /* fall-through */
451 case V4L2_PIX_FMT_NV16:
452 case V4L2_PIX_FMT_NV61:
453 yuv_mode = 1;
454 switch (pcdev->camera_fmt->fourcc) {
455 case V4L2_PIX_FMT_UYVY:
456 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
457 break;
458 case V4L2_PIX_FMT_VYUY:
459 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
460 break;
461 case V4L2_PIX_FMT_YUYV:
462 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
463 break;
464 case V4L2_PIX_FMT_YVYU:
465 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
466 break;
467 default:
468 BUG();
469 }
470 }
471
472 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
473 icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
474 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
475
476 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
477 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
478 value |= buswidth == 16 ? 1 << 12 : 0;
479 ceu_write(pcdev, CAMCR, value);
480
481 ceu_write(pcdev, CAPCR, 0x00300000);
482 ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
483
484 mdelay(1);
485
486 if (yuv_mode) {
487 width = icd->width * 2;
488 width = buswidth == 16 ? width / 2 : width;
489 cfszr_width = cdwdr_width = icd->width;
490 } else {
491 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
492 width = buswidth == 16 ? width / 2 : width;
493 cfszr_width = buswidth == 8 ? width / 2 : width;
494 cdwdr_width = buswidth == 16 ? width * 2 : width;
495 }
496
497 height = icd->height;
498 if (pcdev->is_interlaced) {
499 height /= 2;
500 cdwdr_width *= 2;
501 }
502
503 ceu_write(pcdev, CAMOR, 0);
504 ceu_write(pcdev, CAPWR, (height << 16) | width);
505 ceu_write(pcdev, CFLCR, 0); /* no scaling */
506 ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
507 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
508
509 /* A few words about byte order (observed in Big Endian mode)
510 *
511 * In data fetch mode bytes are received in chunks of 8 bytes.
512 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
513 *
514 * The data is however by default written to memory in reverse order:
515 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
516 *
517 * The lowest three bits of CDOCR allows us to do swapping,
518 * using 7 we swap the data bytes to match the incoming order:
519 * D0, D1, D2, D3, D4, D5, D6, D7
520 */
521 value = 0x00000017;
522 if (yuv_lineskip)
523 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
524
525 ceu_write(pcdev, CDOCR, value);
526
527 ceu_write(pcdev, CDWDR, cdwdr_width);
528 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
529
530 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
531 return 0;
532 }
533
534 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
535 {
536 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
537 struct sh_mobile_ceu_dev *pcdev = ici->priv;
538 unsigned long camera_flags, common_flags;
539
540 camera_flags = icd->ops->query_bus_param(icd);
541 common_flags = soc_camera_bus_param_compatible(camera_flags,
542 make_bus_param(pcdev));
543 if (!common_flags)
544 return -EINVAL;
545
546 return 0;
547 }
548
549 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
550 {
551 .name = "NV12",
552 .depth = 12,
553 .fourcc = V4L2_PIX_FMT_NV12,
554 .colorspace = V4L2_COLORSPACE_JPEG,
555 },
556 {
557 .name = "NV21",
558 .depth = 12,
559 .fourcc = V4L2_PIX_FMT_NV21,
560 .colorspace = V4L2_COLORSPACE_JPEG,
561 },
562 {
563 .name = "NV16",
564 .depth = 16,
565 .fourcc = V4L2_PIX_FMT_NV16,
566 .colorspace = V4L2_COLORSPACE_JPEG,
567 },
568 {
569 .name = "NV61",
570 .depth = 16,
571 .fourcc = V4L2_PIX_FMT_NV61,
572 .colorspace = V4L2_COLORSPACE_JPEG,
573 },
574 };
575
576 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
577 struct soc_camera_format_xlate *xlate)
578 {
579 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
580 int ret, k, n;
581 int formats = 0;
582
583 ret = sh_mobile_ceu_try_bus_param(icd);
584 if (ret < 0)
585 return 0;
586
587 /* Beginning of a pass */
588 if (!idx)
589 icd->host_priv = NULL;
590
591 switch (icd->formats[idx].fourcc) {
592 case V4L2_PIX_FMT_UYVY:
593 case V4L2_PIX_FMT_VYUY:
594 case V4L2_PIX_FMT_YUYV:
595 case V4L2_PIX_FMT_YVYU:
596 if (icd->host_priv)
597 goto add_single_format;
598
599 /*
600 * Our case is simple so far: for any of the above four camera
601 * formats we add all our four synthesized NV* formats, so,
602 * just marking the device with a single flag suffices. If
603 * the format generation rules are more complex, you would have
604 * to actually hang your already added / counted formats onto
605 * the host_priv pointer and check whether the format you're
606 * going to add now is already there.
607 */
608 icd->host_priv = (void *)sh_mobile_ceu_formats;
609
610 n = ARRAY_SIZE(sh_mobile_ceu_formats);
611 formats += n;
612 for (k = 0; xlate && k < n; k++) {
613 xlate->host_fmt = &sh_mobile_ceu_formats[k];
614 xlate->cam_fmt = icd->formats + idx;
615 xlate->buswidth = icd->formats[idx].depth;
616 xlate++;
617 dev_dbg(ici->dev, "Providing format %s using %s\n",
618 sh_mobile_ceu_formats[k].name,
619 icd->formats[idx].name);
620 }
621 default:
622 add_single_format:
623 /* Generic pass-through */
624 formats++;
625 if (xlate) {
626 xlate->host_fmt = icd->formats + idx;
627 xlate->cam_fmt = icd->formats + idx;
628 xlate->buswidth = icd->formats[idx].depth;
629 xlate++;
630 dev_dbg(ici->dev,
631 "Providing format %s in pass-through mode\n",
632 icd->formats[idx].name);
633 }
634 }
635
636 return formats;
637 }
638
639 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
640 struct v4l2_rect *rect)
641 {
642 return icd->ops->set_crop(icd, rect);
643 }
644
645 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
646 struct v4l2_format *f)
647 {
648 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
649 struct sh_mobile_ceu_dev *pcdev = ici->priv;
650 __u32 pixfmt = f->fmt.pix.pixelformat;
651 const struct soc_camera_format_xlate *xlate;
652 struct v4l2_format cam_f = *f;
653 int ret;
654
655 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
656 if (!xlate) {
657 dev_warn(ici->dev, "Format %x not found\n", pixfmt);
658 return -EINVAL;
659 }
660
661 cam_f.fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
662 ret = icd->ops->set_fmt(icd, &cam_f);
663
664 if (!ret) {
665 icd->buswidth = xlate->buswidth;
666 icd->current_fmt = xlate->host_fmt;
667 pcdev->camera_fmt = xlate->cam_fmt;
668 }
669
670 return ret;
671 }
672
673 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
674 struct v4l2_format *f)
675 {
676 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
677 struct sh_mobile_ceu_dev *pcdev = ici->priv;
678 const struct soc_camera_format_xlate *xlate;
679 __u32 pixfmt = f->fmt.pix.pixelformat;
680 int ret;
681
682 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
683 if (!xlate) {
684 dev_warn(ici->dev, "Format %x not found\n", pixfmt);
685 return -EINVAL;
686 }
687
688 /* FIXME: calculate using depth and bus width */
689
690 v4l_bound_align_image(&f->fmt.pix.width, 2, 2560, 1,
691 &f->fmt.pix.height, 4, 1920, 2, 0);
692
693 f->fmt.pix.bytesperline = f->fmt.pix.width *
694 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
695 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
696
697 /* limit to sensor capabilities */
698 ret = icd->ops->try_fmt(icd, f);
699 if (ret < 0)
700 return ret;
701
702 switch (f->fmt.pix.field) {
703 case V4L2_FIELD_INTERLACED:
704 pcdev->is_interlaced = 1;
705 break;
706 case V4L2_FIELD_ANY:
707 f->fmt.pix.field = V4L2_FIELD_NONE;
708 /* fall-through */
709 case V4L2_FIELD_NONE:
710 pcdev->is_interlaced = 0;
711 break;
712 default:
713 ret = -EINVAL;
714 break;
715 }
716
717 return ret;
718 }
719
720 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
721 struct v4l2_requestbuffers *p)
722 {
723 int i;
724
725 /* This is for locking debugging only. I removed spinlocks and now I
726 * check whether .prepare is ever called on a linked buffer, or whether
727 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
728 * it hadn't triggered */
729 for (i = 0; i < p->count; i++) {
730 struct sh_mobile_ceu_buffer *buf;
731
732 buf = container_of(icf->vb_vidq.bufs[i],
733 struct sh_mobile_ceu_buffer, vb);
734 INIT_LIST_HEAD(&buf->vb.queue);
735 }
736
737 return 0;
738 }
739
740 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
741 {
742 struct soc_camera_file *icf = file->private_data;
743 struct sh_mobile_ceu_buffer *buf;
744
745 buf = list_entry(icf->vb_vidq.stream.next,
746 struct sh_mobile_ceu_buffer, vb.stream);
747
748 poll_wait(file, &buf->vb.done, pt);
749
750 if (buf->vb.state == VIDEOBUF_DONE ||
751 buf->vb.state == VIDEOBUF_ERROR)
752 return POLLIN|POLLRDNORM;
753
754 return 0;
755 }
756
757 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
758 struct v4l2_capability *cap)
759 {
760 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
761 cap->version = KERNEL_VERSION(0, 0, 5);
762 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
763 return 0;
764 }
765
766 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
767 struct soc_camera_device *icd)
768 {
769 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
770 struct sh_mobile_ceu_dev *pcdev = ici->priv;
771
772 videobuf_queue_dma_contig_init(q,
773 &sh_mobile_ceu_videobuf_ops,
774 ici->dev, &pcdev->lock,
775 V4L2_BUF_TYPE_VIDEO_CAPTURE,
776 pcdev->is_interlaced ?
777 V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
778 sizeof(struct sh_mobile_ceu_buffer),
779 icd);
780 }
781
782 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
783 .owner = THIS_MODULE,
784 .add = sh_mobile_ceu_add_device,
785 .remove = sh_mobile_ceu_remove_device,
786 .get_formats = sh_mobile_ceu_get_formats,
787 .set_crop = sh_mobile_ceu_set_crop,
788 .set_fmt = sh_mobile_ceu_set_fmt,
789 .try_fmt = sh_mobile_ceu_try_fmt,
790 .reqbufs = sh_mobile_ceu_reqbufs,
791 .poll = sh_mobile_ceu_poll,
792 .querycap = sh_mobile_ceu_querycap,
793 .set_bus_param = sh_mobile_ceu_set_bus_param,
794 .init_videobuf = sh_mobile_ceu_init_videobuf,
795 };
796
797 static int sh_mobile_ceu_probe(struct platform_device *pdev)
798 {
799 struct sh_mobile_ceu_dev *pcdev;
800 struct resource *res;
801 void __iomem *base;
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 pm_suspend_ignore_children(&pdev->dev, true);
866 pm_runtime_enable(&pdev->dev);
867 pm_runtime_resume(&pdev->dev);
868
869 pcdev->ici.priv = pcdev;
870 pcdev->ici.dev = &pdev->dev;
871 pcdev->ici.nr = pdev->id;
872 pcdev->ici.drv_name = dev_name(&pdev->dev);
873 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
874
875 err = soc_camera_host_register(&pcdev->ici);
876 if (err)
877 goto exit_free_irq;
878
879 return 0;
880
881 exit_free_irq:
882 free_irq(pcdev->irq, pcdev);
883 exit_release_mem:
884 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
885 dma_release_declared_memory(&pdev->dev);
886 exit_iounmap:
887 iounmap(base);
888 exit_kfree:
889 kfree(pcdev);
890 exit:
891 return err;
892 }
893
894 static int sh_mobile_ceu_remove(struct platform_device *pdev)
895 {
896 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
897 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
898 struct sh_mobile_ceu_dev, ici);
899
900 soc_camera_host_unregister(soc_host);
901 free_irq(pcdev->irq, pcdev);
902 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
903 dma_release_declared_memory(&pdev->dev);
904 iounmap(pcdev->base);
905 kfree(pcdev);
906 return 0;
907 }
908
909 static int sh_mobile_ceu_runtime_nop(struct device *dev)
910 {
911 /* Runtime PM callback shared between ->runtime_suspend()
912 * and ->runtime_resume(). Simply returns success.
913 *
914 * This driver re-initializes all registers after
915 * pm_runtime_get_sync() anyway so there is no need
916 * to save and restore registers here.
917 */
918 return 0;
919 }
920
921 static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
922 .runtime_suspend = sh_mobile_ceu_runtime_nop,
923 .runtime_resume = sh_mobile_ceu_runtime_nop,
924 };
925
926 static struct platform_driver sh_mobile_ceu_driver = {
927 .driver = {
928 .name = "sh_mobile_ceu",
929 .pm = &sh_mobile_ceu_dev_pm_ops,
930 },
931 .probe = sh_mobile_ceu_probe,
932 .remove = sh_mobile_ceu_remove,
933 };
934
935 static int __init sh_mobile_ceu_init(void)
936 {
937 return platform_driver_register(&sh_mobile_ceu_driver);
938 }
939
940 static void __exit sh_mobile_ceu_exit(void)
941 {
942 platform_driver_unregister(&sh_mobile_ceu_driver);
943 }
944
945 module_init(sh_mobile_ceu_init);
946 module_exit(sh_mobile_ceu_exit);
947
948 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
949 MODULE_AUTHOR("Magnus Damm");
950 MODULE_LICENSE("GPL");
951 MODULE_ALIAS("platform:sh_mobile_ceu");
kernel source for telekom puls (alcatel/mediatek)