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[media] v4l2: replace try_mbus_fmt by set_fmt in bridge drivers
[deliverable/linux.git] / drivers / media / platform / soc_camera / 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/completion.h>
21 #include <linux/delay.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/err.h>
24 #include <linux/errno.h>
25 #include <linux/fs.h>
26 #include <linux/interrupt.h>
27 #include <linux/kernel.h>
28 #include <linux/mm.h>
29 #include <linux/moduleparam.h>
30 #include <linux/of.h>
31 #include <linux/time.h>
32 #include <linux/slab.h>
33 #include <linux/device.h>
34 #include <linux/platform_device.h>
35 #include <linux/videodev2.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/sched.h>
38
39 #include <media/v4l2-async.h>
40 #include <media/v4l2-common.h>
41 #include <media/v4l2-dev.h>
42 #include <media/soc_camera.h>
43 #include <media/sh_mobile_ceu.h>
44 #include <media/sh_mobile_csi2.h>
45 #include <media/videobuf2-dma-contig.h>
46 #include <media/v4l2-mediabus.h>
47 #include <media/soc_mediabus.h>
48
49 #include "soc_scale_crop.h"
50
51 /* register offsets for sh7722 / sh7723 */
52
53 #define CAPSR 0x00 /* Capture start register */
54 #define CAPCR 0x04 /* Capture control register */
55 #define CAMCR 0x08 /* Capture interface control register */
56 #define CMCYR 0x0c /* Capture interface cycle register */
57 #define CAMOR 0x10 /* Capture interface offset register */
58 #define CAPWR 0x14 /* Capture interface width register */
59 #define CAIFR 0x18 /* Capture interface input format register */
60 #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
61 #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
62 #define CRCNTR 0x28 /* CEU register control register */
63 #define CRCMPR 0x2c /* CEU register forcible control register */
64 #define CFLCR 0x30 /* Capture filter control register */
65 #define CFSZR 0x34 /* Capture filter size clip register */
66 #define CDWDR 0x38 /* Capture destination width register */
67 #define CDAYR 0x3c /* Capture data address Y register */
68 #define CDACR 0x40 /* Capture data address C register */
69 #define CDBYR 0x44 /* Capture data bottom-field address Y register */
70 #define CDBCR 0x48 /* Capture data bottom-field address C register */
71 #define CBDSR 0x4c /* Capture bundle destination size register */
72 #define CFWCR 0x5c /* Firewall operation control register */
73 #define CLFCR 0x60 /* Capture low-pass filter control register */
74 #define CDOCR 0x64 /* Capture data output control register */
75 #define CDDCR 0x68 /* Capture data complexity level register */
76 #define CDDAR 0x6c /* Capture data complexity level address register */
77 #define CEIER 0x70 /* Capture event interrupt enable register */
78 #define CETCR 0x74 /* Capture event flag clear register */
79 #define CSTSR 0x7c /* Capture status register */
80 #define CSRTR 0x80 /* Capture software reset register */
81 #define CDSSR 0x84 /* Capture data size register */
82 #define CDAYR2 0x90 /* Capture data address Y register 2 */
83 #define CDACR2 0x94 /* Capture data address C register 2 */
84 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
85 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
86
87 #undef DEBUG_GEOMETRY
88 #ifdef DEBUG_GEOMETRY
89 #define dev_geo dev_info
90 #else
91 #define dev_geo dev_dbg
92 #endif
93
94 /* per video frame buffer */
95 struct sh_mobile_ceu_buffer {
96 struct vb2_buffer vb; /* v4l buffer must be first */
97 struct list_head queue;
98 };
99
100 struct sh_mobile_ceu_dev {
101 struct soc_camera_host ici;
102 /* Asynchronous CSI2 linking */
103 struct v4l2_async_subdev *csi2_asd;
104 struct v4l2_subdev *csi2_sd;
105 /* Synchronous probing compatibility */
106 struct platform_device *csi2_pdev;
107
108 unsigned int irq;
109 void __iomem *base;
110 size_t video_limit;
111 size_t buf_total;
112
113 spinlock_t lock; /* Protects video buffer lists */
114 struct list_head capture;
115 struct vb2_buffer *active;
116 struct vb2_alloc_ctx *alloc_ctx;
117
118 struct sh_mobile_ceu_info *pdata;
119 struct completion complete;
120
121 u32 cflcr;
122
123 /* static max sizes either from platform data or default */
124 int max_width;
125 int max_height;
126
127 enum v4l2_field field;
128 int sequence;
129 unsigned long flags;
130
131 unsigned int image_mode:1;
132 unsigned int is_16bit:1;
133 unsigned int frozen:1;
134 };
135
136 struct sh_mobile_ceu_cam {
137 /* CEU offsets within the camera output, before the CEU scaler */
138 unsigned int ceu_left;
139 unsigned int ceu_top;
140 /* Client output, as seen by the CEU */
141 unsigned int width;
142 unsigned int height;
143 /*
144 * User window from S_CROP / G_CROP, produced by client cropping and
145 * scaling, CEU scaling and CEU cropping, mapped back onto the client
146 * input window
147 */
148 struct v4l2_rect subrect;
149 /* Camera cropping rectangle */
150 struct v4l2_rect rect;
151 const struct soc_mbus_pixelfmt *extra_fmt;
152 u32 code;
153 };
154
155 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_buffer *vb)
156 {
157 return container_of(vb, struct sh_mobile_ceu_buffer, vb);
158 }
159
160 static void ceu_write(struct sh_mobile_ceu_dev *priv,
161 unsigned long reg_offs, u32 data)
162 {
163 iowrite32(data, priv->base + reg_offs);
164 }
165
166 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
167 {
168 return ioread32(priv->base + reg_offs);
169 }
170
171 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
172 {
173 int i, success = 0;
174
175 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
176
177 /* wait CSTSR.CPTON bit */
178 for (i = 0; i < 1000; i++) {
179 if (!(ceu_read(pcdev, CSTSR) & 1)) {
180 success++;
181 break;
182 }
183 udelay(1);
184 }
185
186 /* wait CAPSR.CPKIL bit */
187 for (i = 0; i < 1000; i++) {
188 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
189 success++;
190 break;
191 }
192 udelay(1);
193 }
194
195 if (2 != success) {
196 dev_warn(pcdev->ici.v4l2_dev.dev, "soft reset time out\n");
197 return -EIO;
198 }
199
200 return 0;
201 }
202
203 /*
204 * Videobuf operations
205 */
206
207 /*
208 * .queue_setup() is called to check, whether the driver can accept the
209 * requested number of buffers and to fill in plane sizes
210 * for the current frame format if required
211 */
212 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
213 const struct v4l2_format *fmt,
214 unsigned int *count, unsigned int *num_planes,
215 unsigned int sizes[], void *alloc_ctxs[])
216 {
217 struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
218 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
219 struct sh_mobile_ceu_dev *pcdev = ici->priv;
220
221 if (fmt) {
222 const struct soc_camera_format_xlate *xlate = soc_camera_xlate_by_fourcc(icd,
223 fmt->fmt.pix.pixelformat);
224 unsigned int bytes_per_line;
225 int ret;
226
227 if (!xlate)
228 return -EINVAL;
229
230 ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
231 xlate->host_fmt);
232 if (ret < 0)
233 return ret;
234
235 bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
236
237 ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
238 fmt->fmt.pix.height);
239 if (ret < 0)
240 return ret;
241
242 sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
243 } else {
244 /* Called from VIDIOC_REQBUFS or in compatibility mode */
245 sizes[0] = icd->sizeimage;
246 }
247
248 alloc_ctxs[0] = pcdev->alloc_ctx;
249
250 if (!vq->num_buffers)
251 pcdev->sequence = 0;
252
253 if (!*count)
254 *count = 2;
255
256 /* If *num_planes != 0, we have already verified *count. */
257 if (pcdev->video_limit && !*num_planes) {
258 size_t size = PAGE_ALIGN(sizes[0]) * *count;
259
260 if (size + pcdev->buf_total > pcdev->video_limit)
261 *count = (pcdev->video_limit - pcdev->buf_total) /
262 PAGE_ALIGN(sizes[0]);
263 }
264
265 *num_planes = 1;
266
267 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
268
269 return 0;
270 }
271
272 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
273 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
274 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
275 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
276 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
277 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
278
279
280 /*
281 * return value doesn't reflex the success/failure to queue the new buffer,
282 * but rather the status of the previous buffer.
283 */
284 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
285 {
286 struct soc_camera_device *icd = pcdev->ici.icd;
287 dma_addr_t phys_addr_top, phys_addr_bottom;
288 unsigned long top1, top2;
289 unsigned long bottom1, bottom2;
290 u32 status;
291 bool planar;
292 int ret = 0;
293
294 /*
295 * The hardware is _very_ picky about this sequence. Especially
296 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
297 * several not-so-well documented interrupt sources in CETCR.
298 */
299 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
300 status = ceu_read(pcdev, CETCR);
301 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
302 if (!pcdev->frozen)
303 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
304 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
305 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
306
307 /*
308 * When a VBP interrupt occurs, a capture end interrupt does not occur
309 * and the image of that frame is not captured correctly. So, soft reset
310 * is needed here.
311 */
312 if (status & CEU_CEIER_VBP) {
313 sh_mobile_ceu_soft_reset(pcdev);
314 ret = -EIO;
315 }
316
317 if (pcdev->frozen) {
318 complete(&pcdev->complete);
319 return ret;
320 }
321
322 if (!pcdev->active)
323 return ret;
324
325 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
326 top1 = CDBYR;
327 top2 = CDBCR;
328 bottom1 = CDAYR;
329 bottom2 = CDACR;
330 } else {
331 top1 = CDAYR;
332 top2 = CDACR;
333 bottom1 = CDBYR;
334 bottom2 = CDBCR;
335 }
336
337 phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0);
338
339 switch (icd->current_fmt->host_fmt->fourcc) {
340 case V4L2_PIX_FMT_NV12:
341 case V4L2_PIX_FMT_NV21:
342 case V4L2_PIX_FMT_NV16:
343 case V4L2_PIX_FMT_NV61:
344 planar = true;
345 break;
346 default:
347 planar = false;
348 }
349
350 ceu_write(pcdev, top1, phys_addr_top);
351 if (V4L2_FIELD_NONE != pcdev->field) {
352 phys_addr_bottom = phys_addr_top + icd->bytesperline;
353 ceu_write(pcdev, bottom1, phys_addr_bottom);
354 }
355
356 if (planar) {
357 phys_addr_top += icd->bytesperline * icd->user_height;
358 ceu_write(pcdev, top2, phys_addr_top);
359 if (V4L2_FIELD_NONE != pcdev->field) {
360 phys_addr_bottom = phys_addr_top + icd->bytesperline;
361 ceu_write(pcdev, bottom2, phys_addr_bottom);
362 }
363 }
364
365 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
366
367 return ret;
368 }
369
370 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
371 {
372 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
373
374 /* Added list head initialization on alloc */
375 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
376
377 return 0;
378 }
379
380 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
381 {
382 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
383 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
384 struct sh_mobile_ceu_dev *pcdev = ici->priv;
385 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
386 unsigned long size;
387
388 size = icd->sizeimage;
389
390 if (vb2_plane_size(vb, 0) < size) {
391 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
392 vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
393 goto error;
394 }
395
396 vb2_set_plane_payload(vb, 0, size);
397
398 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
399 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
400
401 #ifdef DEBUG
402 /*
403 * This can be useful if you want to see if we actually fill
404 * the buffer with something
405 */
406 if (vb2_plane_vaddr(vb, 0))
407 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
408 #endif
409
410 spin_lock_irq(&pcdev->lock);
411 list_add_tail(&buf->queue, &pcdev->capture);
412
413 if (!pcdev->active) {
414 /*
415 * Because there were no active buffer at this moment,
416 * we are not interested in the return value of
417 * sh_mobile_ceu_capture here.
418 */
419 pcdev->active = vb;
420 sh_mobile_ceu_capture(pcdev);
421 }
422 spin_unlock_irq(&pcdev->lock);
423
424 return;
425
426 error:
427 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
428 }
429
430 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
431 {
432 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
433 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
434 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
435 struct sh_mobile_ceu_dev *pcdev = ici->priv;
436
437 spin_lock_irq(&pcdev->lock);
438
439 if (pcdev->active == vb) {
440 /* disable capture (release DMA buffer), reset */
441 ceu_write(pcdev, CAPSR, 1 << 16);
442 pcdev->active = NULL;
443 }
444
445 /*
446 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
447 * buffer failed, and .buf_init() hasn't been called
448 */
449 if (buf->queue.next)
450 list_del_init(&buf->queue);
451
452 pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
453 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
454 pcdev->buf_total);
455
456 spin_unlock_irq(&pcdev->lock);
457 }
458
459 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
460 {
461 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
462 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
463 struct sh_mobile_ceu_dev *pcdev = ici->priv;
464
465 pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
466 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
467 pcdev->buf_total);
468
469 /* This is for locking debugging only */
470 INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
471 return 0;
472 }
473
474 static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
475 {
476 struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
477 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
478 struct sh_mobile_ceu_dev *pcdev = ici->priv;
479 struct list_head *buf_head, *tmp;
480
481 spin_lock_irq(&pcdev->lock);
482
483 pcdev->active = NULL;
484
485 list_for_each_safe(buf_head, tmp, &pcdev->capture)
486 list_del_init(buf_head);
487
488 spin_unlock_irq(&pcdev->lock);
489
490 sh_mobile_ceu_soft_reset(pcdev);
491 }
492
493 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
494 .queue_setup = sh_mobile_ceu_videobuf_setup,
495 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
496 .buf_queue = sh_mobile_ceu_videobuf_queue,
497 .buf_cleanup = sh_mobile_ceu_videobuf_release,
498 .buf_init = sh_mobile_ceu_videobuf_init,
499 .wait_prepare = vb2_ops_wait_prepare,
500 .wait_finish = vb2_ops_wait_finish,
501 .stop_streaming = sh_mobile_ceu_stop_streaming,
502 };
503
504 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
505 {
506 struct sh_mobile_ceu_dev *pcdev = data;
507 struct vb2_buffer *vb;
508 int ret;
509
510 spin_lock(&pcdev->lock);
511
512 vb = pcdev->active;
513 if (!vb)
514 /* Stale interrupt from a released buffer */
515 goto out;
516
517 list_del_init(&to_ceu_vb(vb)->queue);
518
519 if (!list_empty(&pcdev->capture))
520 pcdev->active = &list_entry(pcdev->capture.next,
521 struct sh_mobile_ceu_buffer, queue)->vb;
522 else
523 pcdev->active = NULL;
524
525 ret = sh_mobile_ceu_capture(pcdev);
526 v4l2_get_timestamp(&vb->v4l2_buf.timestamp);
527 if (!ret) {
528 vb->v4l2_buf.field = pcdev->field;
529 vb->v4l2_buf.sequence = pcdev->sequence++;
530 }
531 vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
532
533 out:
534 spin_unlock(&pcdev->lock);
535
536 return IRQ_HANDLED;
537 }
538
539 static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
540 {
541 struct v4l2_subdev *sd;
542
543 if (pcdev->csi2_sd)
544 return pcdev->csi2_sd;
545
546 if (pcdev->csi2_asd) {
547 char name[] = "sh-mobile-csi2";
548 v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
549 if (!strncmp(name, sd->name, sizeof(name) - 1)) {
550 pcdev->csi2_sd = sd;
551 return sd;
552 }
553 }
554
555 return NULL;
556 }
557
558 static struct v4l2_subdev *csi2_subdev(struct sh_mobile_ceu_dev *pcdev,
559 struct soc_camera_device *icd)
560 {
561 struct v4l2_subdev *sd = pcdev->csi2_sd;
562
563 return sd && sd->grp_id == soc_camera_grp_id(icd) ? sd : NULL;
564 }
565
566 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
567 {
568 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
569 struct sh_mobile_ceu_dev *pcdev = ici->priv;
570 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
571 int ret;
572
573 if (csi2_sd) {
574 csi2_sd->grp_id = soc_camera_grp_id(icd);
575 v4l2_set_subdev_hostdata(csi2_sd, icd);
576 }
577
578 ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
579 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
580 return ret;
581
582 /*
583 * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver
584 * has not found this soc-camera device among its clients
585 */
586 if (csi2_sd && ret == -ENODEV)
587 csi2_sd->grp_id = 0;
588
589 dev_info(icd->parent,
590 "SuperH Mobile CEU%s driver attached to camera %d\n",
591 csi2_sd && csi2_sd->grp_id ? "/CSI-2" : "", icd->devnum);
592
593 return 0;
594 }
595
596 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
597 {
598 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
599 struct sh_mobile_ceu_dev *pcdev = ici->priv;
600 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
601
602 dev_info(icd->parent,
603 "SuperH Mobile CEU driver detached from camera %d\n",
604 icd->devnum);
605
606 v4l2_subdev_call(csi2_sd, core, s_power, 0);
607 }
608
609 /* Called with .host_lock held */
610 static int sh_mobile_ceu_clock_start(struct soc_camera_host *ici)
611 {
612 struct sh_mobile_ceu_dev *pcdev = ici->priv;
613
614 pm_runtime_get_sync(ici->v4l2_dev.dev);
615
616 pcdev->buf_total = 0;
617
618 sh_mobile_ceu_soft_reset(pcdev);
619
620 return 0;
621 }
622
623 /* Called with .host_lock held */
624 static void sh_mobile_ceu_clock_stop(struct soc_camera_host *ici)
625 {
626 struct sh_mobile_ceu_dev *pcdev = ici->priv;
627
628 /* disable capture, disable interrupts */
629 ceu_write(pcdev, CEIER, 0);
630 sh_mobile_ceu_soft_reset(pcdev);
631
632 /* make sure active buffer is canceled */
633 spin_lock_irq(&pcdev->lock);
634 if (pcdev->active) {
635 list_del_init(&to_ceu_vb(pcdev->active)->queue);
636 vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
637 pcdev->active = NULL;
638 }
639 spin_unlock_irq(&pcdev->lock);
640
641 pm_runtime_put(ici->v4l2_dev.dev);
642 }
643
644 /*
645 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
646 * in SH7722 Hardware Manual
647 */
648 static unsigned int size_dst(unsigned int src, unsigned int scale)
649 {
650 unsigned int mant_pre = scale >> 12;
651 if (!src || !scale)
652 return src;
653 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
654 mant_pre * 4096 / scale + 1;
655 }
656
657 static u16 calc_scale(unsigned int src, unsigned int *dst)
658 {
659 u16 scale;
660
661 if (src == *dst)
662 return 0;
663
664 scale = (src * 4096 / *dst) & ~7;
665
666 while (scale > 4096 && size_dst(src, scale) < *dst)
667 scale -= 8;
668
669 *dst = size_dst(src, scale);
670
671 return scale;
672 }
673
674 /* rect is guaranteed to not exceed the scaled camera rectangle */
675 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
676 {
677 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
678 struct sh_mobile_ceu_cam *cam = icd->host_priv;
679 struct sh_mobile_ceu_dev *pcdev = ici->priv;
680 unsigned int height, width, cdwdr_width, in_width, in_height;
681 unsigned int left_offset, top_offset;
682 u32 camor;
683
684 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
685 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
686
687 left_offset = cam->ceu_left;
688 top_offset = cam->ceu_top;
689
690 WARN_ON(icd->user_width & 3 || icd->user_height & 3);
691
692 width = icd->user_width;
693
694 if (pcdev->image_mode) {
695 in_width = cam->width;
696 if (!pcdev->is_16bit) {
697 in_width *= 2;
698 left_offset *= 2;
699 }
700 } else {
701 unsigned int w_factor;
702
703 switch (icd->current_fmt->host_fmt->packing) {
704 case SOC_MBUS_PACKING_2X8_PADHI:
705 w_factor = 2;
706 break;
707 default:
708 w_factor = 1;
709 }
710
711 in_width = cam->width * w_factor;
712 left_offset *= w_factor;
713 }
714
715 cdwdr_width = icd->bytesperline;
716
717 height = icd->user_height;
718 in_height = cam->height;
719 if (V4L2_FIELD_NONE != pcdev->field) {
720 height = (height / 2) & ~3;
721 in_height /= 2;
722 top_offset /= 2;
723 cdwdr_width *= 2;
724 }
725
726 /* CSI2 special configuration */
727 if (csi2_subdev(pcdev, icd)) {
728 in_width = ((in_width - 2) * 2);
729 left_offset *= 2;
730 }
731
732 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
733 camor = left_offset | (top_offset << 16);
734
735 dev_geo(icd->parent,
736 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
737 (in_height << 16) | in_width, (height << 16) | width,
738 cdwdr_width);
739
740 ceu_write(pcdev, CAMOR, camor);
741 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
742 /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
743 ceu_write(pcdev, CFSZR, (height << 16) | width);
744 ceu_write(pcdev, CDWDR, cdwdr_width);
745 }
746
747 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
748 {
749 u32 capsr = ceu_read(pcdev, CAPSR);
750 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
751 return capsr;
752 }
753
754 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
755 {
756 unsigned long timeout = jiffies + 10 * HZ;
757
758 /*
759 * Wait until the end of the current frame. It can take a long time,
760 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
761 */
762 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
763 msleep(1);
764
765 if (time_after(jiffies, timeout)) {
766 dev_err(pcdev->ici.v4l2_dev.dev,
767 "Timeout waiting for frame end! Interface problem?\n");
768 return;
769 }
770
771 /* Wait until reset clears, this shall not hang... */
772 while (ceu_read(pcdev, CAPSR) & (1 << 16))
773 udelay(10);
774
775 /* Anything to restore? */
776 if (capsr & ~(1 << 16))
777 ceu_write(pcdev, CAPSR, capsr);
778 }
779
780 /* Find the bus subdevice driver, e.g., CSI2 */
781 static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
782 struct soc_camera_device *icd)
783 {
784 return csi2_subdev(pcdev, icd) ? : soc_camera_to_subdev(icd);
785 }
786
787 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \
788 V4L2_MBUS_PCLK_SAMPLE_RISING | \
789 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
790 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
791 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
792 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
793 V4L2_MBUS_DATA_ACTIVE_HIGH)
794
795 /* Capture is not running, no interrupts, no locking needed */
796 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
797 {
798 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
799 struct sh_mobile_ceu_dev *pcdev = ici->priv;
800 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
801 struct sh_mobile_ceu_cam *cam = icd->host_priv;
802 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
803 unsigned long value, common_flags = CEU_BUS_FLAGS;
804 u32 capsr = capture_save_reset(pcdev);
805 unsigned int yuv_lineskip;
806 int ret;
807
808 /*
809 * If the client doesn't implement g_mbus_config, we just use our
810 * platform data
811 */
812 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
813 if (!ret) {
814 common_flags = soc_mbus_config_compatible(&cfg,
815 common_flags);
816 if (!common_flags)
817 return -EINVAL;
818 } else if (ret != -ENOIOCTLCMD) {
819 return ret;
820 }
821
822 /* Make choises, based on platform preferences */
823 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
824 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
825 if (pcdev->flags & SH_CEU_FLAG_HSYNC_LOW)
826 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
827 else
828 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
829 }
830
831 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
832 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
833 if (pcdev->flags & SH_CEU_FLAG_VSYNC_LOW)
834 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
835 else
836 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
837 }
838
839 cfg.flags = common_flags;
840 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
841 if (ret < 0 && ret != -ENOIOCTLCMD)
842 return ret;
843
844 if (icd->current_fmt->host_fmt->bits_per_sample > 8)
845 pcdev->is_16bit = 1;
846 else
847 pcdev->is_16bit = 0;
848
849 ceu_write(pcdev, CRCNTR, 0);
850 ceu_write(pcdev, CRCMPR, 0);
851
852 value = 0x00000010; /* data fetch by default */
853 yuv_lineskip = 0x10;
854
855 switch (icd->current_fmt->host_fmt->fourcc) {
856 case V4L2_PIX_FMT_NV12:
857 case V4L2_PIX_FMT_NV21:
858 /* convert 4:2:2 -> 4:2:0 */
859 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
860 /* fall-through */
861 case V4L2_PIX_FMT_NV16:
862 case V4L2_PIX_FMT_NV61:
863 switch (cam->code) {
864 case MEDIA_BUS_FMT_UYVY8_2X8:
865 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
866 break;
867 case MEDIA_BUS_FMT_VYUY8_2X8:
868 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
869 break;
870 case MEDIA_BUS_FMT_YUYV8_2X8:
871 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
872 break;
873 case MEDIA_BUS_FMT_YVYU8_2X8:
874 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
875 break;
876 default:
877 BUG();
878 }
879 }
880
881 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
882 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
883 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
884
885 value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
886 value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
887
888 if (csi2_subdev(pcdev, icd)) /* CSI2 mode */
889 value |= 3 << 12;
890 else if (pcdev->is_16bit)
891 value |= 1 << 12;
892 else if (pcdev->flags & SH_CEU_FLAG_LOWER_8BIT)
893 value |= 2 << 12;
894
895 ceu_write(pcdev, CAMCR, value);
896
897 ceu_write(pcdev, CAPCR, 0x00300000);
898
899 switch (pcdev->field) {
900 case V4L2_FIELD_INTERLACED_TB:
901 value = 0x101;
902 break;
903 case V4L2_FIELD_INTERLACED_BT:
904 value = 0x102;
905 break;
906 default:
907 value = 0;
908 break;
909 }
910 ceu_write(pcdev, CAIFR, value);
911
912 sh_mobile_ceu_set_rect(icd);
913 mdelay(1);
914
915 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
916 ceu_write(pcdev, CFLCR, pcdev->cflcr);
917
918 /*
919 * A few words about byte order (observed in Big Endian mode)
920 *
921 * In data fetch mode bytes are received in chunks of 8 bytes.
922 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
923 *
924 * The data is however by default written to memory in reverse order:
925 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
926 *
927 * The lowest three bits of CDOCR allows us to do swapping,
928 * using 7 we swap the data bytes to match the incoming order:
929 * D0, D1, D2, D3, D4, D5, D6, D7
930 */
931 value = 0x00000007 | yuv_lineskip;
932
933 ceu_write(pcdev, CDOCR, value);
934 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
935
936 capture_restore(pcdev, capsr);
937
938 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
939 return 0;
940 }
941
942 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
943 unsigned char buswidth)
944 {
945 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
946 struct sh_mobile_ceu_dev *pcdev = ici->priv;
947 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
948 unsigned long common_flags = CEU_BUS_FLAGS;
949 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
950 int ret;
951
952 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
953 if (!ret)
954 common_flags = soc_mbus_config_compatible(&cfg,
955 common_flags);
956 else if (ret != -ENOIOCTLCMD)
957 return ret;
958
959 if (!common_flags || buswidth > 16)
960 return -EINVAL;
961
962 return 0;
963 }
964
965 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
966 {
967 .fourcc = V4L2_PIX_FMT_NV12,
968 .name = "NV12",
969 .bits_per_sample = 8,
970 .packing = SOC_MBUS_PACKING_1_5X8,
971 .order = SOC_MBUS_ORDER_LE,
972 .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
973 }, {
974 .fourcc = V4L2_PIX_FMT_NV21,
975 .name = "NV21",
976 .bits_per_sample = 8,
977 .packing = SOC_MBUS_PACKING_1_5X8,
978 .order = SOC_MBUS_ORDER_LE,
979 .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
980 }, {
981 .fourcc = V4L2_PIX_FMT_NV16,
982 .name = "NV16",
983 .bits_per_sample = 8,
984 .packing = SOC_MBUS_PACKING_2X8_PADHI,
985 .order = SOC_MBUS_ORDER_LE,
986 .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
987 }, {
988 .fourcc = V4L2_PIX_FMT_NV61,
989 .name = "NV61",
990 .bits_per_sample = 8,
991 .packing = SOC_MBUS_PACKING_2X8_PADHI,
992 .order = SOC_MBUS_ORDER_LE,
993 .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
994 },
995 };
996
997 /* This will be corrected as we get more formats */
998 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
999 {
1000 return fmt->packing == SOC_MBUS_PACKING_NONE ||
1001 (fmt->bits_per_sample == 8 &&
1002 fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
1003 (fmt->bits_per_sample == 8 &&
1004 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
1005 (fmt->bits_per_sample > 8 &&
1006 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
1007 }
1008
1009 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
1010 {
1011 return container_of(ctrl->handler, struct soc_camera_device,
1012 ctrl_handler);
1013 }
1014
1015 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
1016 {
1017 struct soc_camera_device *icd = ctrl_to_icd(ctrl);
1018 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1019 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1020
1021 switch (ctrl->id) {
1022 case V4L2_CID_SHARPNESS:
1023 switch (icd->current_fmt->host_fmt->fourcc) {
1024 case V4L2_PIX_FMT_NV12:
1025 case V4L2_PIX_FMT_NV21:
1026 case V4L2_PIX_FMT_NV16:
1027 case V4L2_PIX_FMT_NV61:
1028 ceu_write(pcdev, CLFCR, !ctrl->val);
1029 return 0;
1030 }
1031 break;
1032 }
1033
1034 return -EINVAL;
1035 }
1036
1037 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
1038 .s_ctrl = sh_mobile_ceu_s_ctrl,
1039 };
1040
1041 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
1042 struct soc_camera_format_xlate *xlate)
1043 {
1044 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1045 struct device *dev = icd->parent;
1046 struct soc_camera_host *ici = to_soc_camera_host(dev);
1047 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1048 int ret, k, n;
1049 int formats = 0;
1050 struct sh_mobile_ceu_cam *cam;
1051 struct v4l2_subdev_mbus_code_enum code = {
1052 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1053 .index = idx,
1054 };
1055 const struct soc_mbus_pixelfmt *fmt;
1056
1057 ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
1058 if (ret < 0)
1059 /* No more formats */
1060 return 0;
1061
1062 fmt = soc_mbus_get_fmtdesc(code.code);
1063 if (!fmt) {
1064 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code.code);
1065 return 0;
1066 }
1067
1068 if (!csi2_subdev(pcdev, icd)) {
1069 /* Are there any restrictions in the CSI-2 case? */
1070 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
1071 if (ret < 0)
1072 return 0;
1073 }
1074
1075 if (!icd->host_priv) {
1076 struct v4l2_subdev_format fmt = {
1077 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1078 };
1079 struct v4l2_mbus_framefmt *mf = &fmt.format;
1080 struct v4l2_rect rect;
1081 int shift = 0;
1082
1083 /* Add our control */
1084 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
1085 V4L2_CID_SHARPNESS, 0, 1, 1, 1);
1086 if (icd->ctrl_handler.error)
1087 return icd->ctrl_handler.error;
1088
1089 /* FIXME: subwindow is lost between close / open */
1090
1091 /* Cache current client geometry */
1092 ret = soc_camera_client_g_rect(sd, &rect);
1093 if (ret < 0)
1094 return ret;
1095
1096 /* First time */
1097 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1098 if (ret < 0)
1099 return ret;
1100
1101 /*
1102 * All currently existing CEU implementations support 2560x1920
1103 * or larger frames. If the sensor is proposing too big a frame,
1104 * don't bother with possibly supportred by the CEU larger
1105 * sizes, just try VGA multiples. If needed, this can be
1106 * adjusted in the future.
1107 */
1108 while ((mf->width > pcdev->max_width ||
1109 mf->height > pcdev->max_height) && shift < 4) {
1110 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1111 mf->width = 2560 >> shift;
1112 mf->height = 1920 >> shift;
1113 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1114 soc_camera_grp_id(icd), video,
1115 s_mbus_fmt, mf);
1116 if (ret < 0)
1117 return ret;
1118 shift++;
1119 }
1120
1121 if (shift == 4) {
1122 dev_err(dev, "Failed to configure the client below %ux%x\n",
1123 mf->width, mf->height);
1124 return -EIO;
1125 }
1126
1127 dev_geo(dev, "camera fmt %ux%u\n", mf->width, mf->height);
1128
1129 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1130 if (!cam)
1131 return -ENOMEM;
1132
1133 /* We are called with current camera crop, initialise subrect with it */
1134 cam->rect = rect;
1135 cam->subrect = rect;
1136
1137 cam->width = mf->width;
1138 cam->height = mf->height;
1139
1140 icd->host_priv = cam;
1141 } else {
1142 cam = icd->host_priv;
1143 }
1144
1145 /* Beginning of a pass */
1146 if (!idx)
1147 cam->extra_fmt = NULL;
1148
1149 switch (code.code) {
1150 case MEDIA_BUS_FMT_UYVY8_2X8:
1151 case MEDIA_BUS_FMT_VYUY8_2X8:
1152 case MEDIA_BUS_FMT_YUYV8_2X8:
1153 case MEDIA_BUS_FMT_YVYU8_2X8:
1154 if (cam->extra_fmt)
1155 break;
1156
1157 /*
1158 * Our case is simple so far: for any of the above four camera
1159 * formats we add all our four synthesized NV* formats, so,
1160 * just marking the device with a single flag suffices. If
1161 * the format generation rules are more complex, you would have
1162 * to actually hang your already added / counted formats onto
1163 * the host_priv pointer and check whether the format you're
1164 * going to add now is already there.
1165 */
1166 cam->extra_fmt = sh_mobile_ceu_formats;
1167
1168 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1169 formats += n;
1170 for (k = 0; xlate && k < n; k++) {
1171 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1172 xlate->code = code.code;
1173 xlate++;
1174 dev_dbg(dev, "Providing format %s using code %d\n",
1175 sh_mobile_ceu_formats[k].name, code.code);
1176 }
1177 break;
1178 default:
1179 if (!sh_mobile_ceu_packing_supported(fmt))
1180 return 0;
1181 }
1182
1183 /* Generic pass-through */
1184 formats++;
1185 if (xlate) {
1186 xlate->host_fmt = fmt;
1187 xlate->code = code.code;
1188 xlate++;
1189 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1190 fmt->name);
1191 }
1192
1193 return formats;
1194 }
1195
1196 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1197 {
1198 kfree(icd->host_priv);
1199 icd->host_priv = NULL;
1200 }
1201
1202 #define scale_down(size, scale) soc_camera_shift_scale(size, 12, scale)
1203 #define calc_generic_scale(in, out) soc_camera_calc_scale(in, 12, out)
1204
1205 /*
1206 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1207 * framerate by always requesting the maximum image from the client. See
1208 * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1209 * scaling and cropping algorithms and for the meaning of referenced here steps.
1210 */
1211 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1212 const struct v4l2_crop *a)
1213 {
1214 struct v4l2_crop a_writable = *a;
1215 const struct v4l2_rect *rect = &a_writable.c;
1216 struct device *dev = icd->parent;
1217 struct soc_camera_host *ici = to_soc_camera_host(dev);
1218 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1219 struct v4l2_crop cam_crop;
1220 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1221 struct v4l2_rect *cam_rect = &cam_crop.c;
1222 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1223 struct v4l2_subdev_format fmt = {
1224 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1225 };
1226 struct v4l2_mbus_framefmt *mf = &fmt.format;
1227 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1228 out_width, out_height;
1229 int interm_width, interm_height;
1230 u32 capsr, cflcr;
1231 int ret;
1232
1233 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1234 rect->left, rect->top);
1235
1236 /* During camera cropping its output window can change too, stop CEU */
1237 capsr = capture_save_reset(pcdev);
1238 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1239
1240 /*
1241 * 1. - 2. Apply iterative camera S_CROP for new input window, read back
1242 * actual camera rectangle.
1243 */
1244 ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
1245 &cam->rect, &cam->subrect);
1246 if (ret < 0)
1247 return ret;
1248
1249 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1250 cam_rect->width, cam_rect->height,
1251 cam_rect->left, cam_rect->top);
1252
1253 /* On success cam_crop contains current camera crop */
1254
1255 /* 3. Retrieve camera output window */
1256 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1257 if (ret < 0)
1258 return ret;
1259
1260 if (mf->width > pcdev->max_width || mf->height > pcdev->max_height)
1261 return -EINVAL;
1262
1263 /* 4. Calculate camera scales */
1264 scale_cam_h = calc_generic_scale(cam_rect->width, mf->width);
1265 scale_cam_v = calc_generic_scale(cam_rect->height, mf->height);
1266
1267 /* Calculate intermediate window */
1268 interm_width = scale_down(rect->width, scale_cam_h);
1269 interm_height = scale_down(rect->height, scale_cam_v);
1270
1271 if (interm_width < icd->user_width) {
1272 u32 new_scale_h;
1273
1274 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1275
1276 mf->width = scale_down(cam_rect->width, new_scale_h);
1277 }
1278
1279 if (interm_height < icd->user_height) {
1280 u32 new_scale_v;
1281
1282 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1283
1284 mf->height = scale_down(cam_rect->height, new_scale_v);
1285 }
1286
1287 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1288 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1289 soc_camera_grp_id(icd), video,
1290 s_mbus_fmt, mf);
1291 if (ret < 0)
1292 return ret;
1293
1294 dev_geo(dev, "New camera output %ux%u\n", mf->width, mf->height);
1295 scale_cam_h = calc_generic_scale(cam_rect->width, mf->width);
1296 scale_cam_v = calc_generic_scale(cam_rect->height, mf->height);
1297 interm_width = scale_down(rect->width, scale_cam_h);
1298 interm_height = scale_down(rect->height, scale_cam_v);
1299 }
1300
1301 /* Cache camera output window */
1302 cam->width = mf->width;
1303 cam->height = mf->height;
1304
1305 if (pcdev->image_mode) {
1306 out_width = min(interm_width, icd->user_width);
1307 out_height = min(interm_height, icd->user_height);
1308 } else {
1309 out_width = interm_width;
1310 out_height = interm_height;
1311 }
1312
1313 /*
1314 * 5. Calculate CEU scales from camera scales from results of (5) and
1315 * the user window
1316 */
1317 scale_ceu_h = calc_scale(interm_width, &out_width);
1318 scale_ceu_v = calc_scale(interm_height, &out_height);
1319
1320 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1321
1322 /* Apply CEU scales. */
1323 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1324 if (cflcr != pcdev->cflcr) {
1325 pcdev->cflcr = cflcr;
1326 ceu_write(pcdev, CFLCR, cflcr);
1327 }
1328
1329 icd->user_width = out_width & ~3;
1330 icd->user_height = out_height & ~3;
1331 /* Offsets are applied at the CEU scaling filter input */
1332 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1333 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1334
1335 /* 6. Use CEU cropping to crop to the new window. */
1336 sh_mobile_ceu_set_rect(icd);
1337
1338 cam->subrect = *rect;
1339
1340 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1341 icd->user_width, icd->user_height,
1342 cam->ceu_left, cam->ceu_top);
1343
1344 /* Restore capture. The CE bit can be cleared by the hardware */
1345 if (pcdev->active)
1346 capsr |= 1;
1347 capture_restore(pcdev, capsr);
1348
1349 /* Even if only camera cropping succeeded */
1350 return ret;
1351 }
1352
1353 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1354 struct v4l2_crop *a)
1355 {
1356 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1357
1358 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1359 a->c = cam->subrect;
1360
1361 return 0;
1362 }
1363
1364 /* Similar to set_crop multistage iterative algorithm */
1365 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1366 struct v4l2_format *f)
1367 {
1368 struct device *dev = icd->parent;
1369 struct soc_camera_host *ici = to_soc_camera_host(dev);
1370 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1371 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1372 struct v4l2_pix_format *pix = &f->fmt.pix;
1373 struct v4l2_mbus_framefmt mf;
1374 __u32 pixfmt = pix->pixelformat;
1375 const struct soc_camera_format_xlate *xlate;
1376 unsigned int ceu_sub_width = pcdev->max_width,
1377 ceu_sub_height = pcdev->max_height;
1378 u16 scale_v, scale_h;
1379 int ret;
1380 bool image_mode;
1381 enum v4l2_field field;
1382
1383 switch (pix->field) {
1384 default:
1385 pix->field = V4L2_FIELD_NONE;
1386 /* fall-through */
1387 case V4L2_FIELD_INTERLACED_TB:
1388 case V4L2_FIELD_INTERLACED_BT:
1389 case V4L2_FIELD_NONE:
1390 field = pix->field;
1391 break;
1392 case V4L2_FIELD_INTERLACED:
1393 field = V4L2_FIELD_INTERLACED_TB;
1394 break;
1395 }
1396
1397 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1398 if (!xlate) {
1399 dev_warn(dev, "Format %x not found\n", pixfmt);
1400 return -EINVAL;
1401 }
1402
1403 /* 1.-4. Calculate desired client output geometry */
1404 soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12);
1405 mf.field = pix->field;
1406 mf.colorspace = pix->colorspace;
1407 mf.code = xlate->code;
1408
1409 switch (pixfmt) {
1410 case V4L2_PIX_FMT_NV12:
1411 case V4L2_PIX_FMT_NV21:
1412 case V4L2_PIX_FMT_NV16:
1413 case V4L2_PIX_FMT_NV61:
1414 image_mode = true;
1415 break;
1416 default:
1417 image_mode = false;
1418 }
1419
1420 dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1421 pix->width, pix->height);
1422
1423 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1424
1425 /* 5. - 9. */
1426 ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1427 &mf, &ceu_sub_width, &ceu_sub_height,
1428 image_mode && V4L2_FIELD_NONE == field, 12);
1429
1430 dev_geo(dev, "5-9: client scale return %d\n", ret);
1431
1432 /* Done with the camera. Now see if we can improve the result */
1433
1434 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1435 mf.width, mf.height, pix->width, pix->height);
1436 if (ret < 0)
1437 return ret;
1438
1439 if (mf.code != xlate->code)
1440 return -EINVAL;
1441
1442 /* 9. Prepare CEU crop */
1443 cam->width = mf.width;
1444 cam->height = mf.height;
1445
1446 /* 10. Use CEU scaling to scale to the requested user window. */
1447
1448 /* We cannot scale up */
1449 if (pix->width > ceu_sub_width)
1450 ceu_sub_width = pix->width;
1451
1452 if (pix->height > ceu_sub_height)
1453 ceu_sub_height = pix->height;
1454
1455 pix->colorspace = mf.colorspace;
1456
1457 if (image_mode) {
1458 /* Scale pix->{width x height} down to width x height */
1459 scale_h = calc_scale(ceu_sub_width, &pix->width);
1460 scale_v = calc_scale(ceu_sub_height, &pix->height);
1461 } else {
1462 pix->width = ceu_sub_width;
1463 pix->height = ceu_sub_height;
1464 scale_h = 0;
1465 scale_v = 0;
1466 }
1467
1468 pcdev->cflcr = scale_h | (scale_v << 16);
1469
1470 /*
1471 * We have calculated CFLCR, the actual configuration will be performed
1472 * in sh_mobile_ceu_set_bus_param()
1473 */
1474
1475 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1476 ceu_sub_width, scale_h, pix->width,
1477 ceu_sub_height, scale_v, pix->height);
1478
1479 cam->code = xlate->code;
1480 icd->current_fmt = xlate;
1481
1482 pcdev->field = field;
1483 pcdev->image_mode = image_mode;
1484
1485 /* CFSZR requirement */
1486 pix->width &= ~3;
1487 pix->height &= ~3;
1488
1489 return 0;
1490 }
1491
1492 #define CEU_CHDW_MAX 8188U /* Maximum line stride */
1493
1494 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1495 struct v4l2_format *f)
1496 {
1497 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1498 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1499 const struct soc_camera_format_xlate *xlate;
1500 struct v4l2_pix_format *pix = &f->fmt.pix;
1501 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1502 struct v4l2_subdev_pad_config pad_cfg;
1503 struct v4l2_subdev_format format = {
1504 .which = V4L2_SUBDEV_FORMAT_TRY,
1505 };
1506 struct v4l2_mbus_framefmt *mf = &format.format;
1507 __u32 pixfmt = pix->pixelformat;
1508 int width, height;
1509 int ret;
1510
1511 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1512 pixfmt, pix->width, pix->height);
1513
1514 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1515 if (!xlate) {
1516 xlate = icd->current_fmt;
1517 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1518 pixfmt, xlate->host_fmt->fourcc);
1519 pixfmt = xlate->host_fmt->fourcc;
1520 pix->pixelformat = pixfmt;
1521 pix->colorspace = icd->colorspace;
1522 }
1523
1524 /* FIXME: calculate using depth and bus width */
1525
1526 /* CFSZR requires height and width to be 4-pixel aligned */
1527 v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2,
1528 &pix->height, 4, pcdev->max_height, 2, 0);
1529
1530 width = pix->width;
1531 height = pix->height;
1532
1533 /* limit to sensor capabilities */
1534 mf->width = pix->width;
1535 mf->height = pix->height;
1536 mf->field = pix->field;
1537 mf->code = xlate->code;
1538 mf->colorspace = pix->colorspace;
1539
1540 ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1541 pad, set_fmt, &pad_cfg, &format);
1542 if (ret < 0)
1543 return ret;
1544
1545 pix->width = mf->width;
1546 pix->height = mf->height;
1547 pix->field = mf->field;
1548 pix->colorspace = mf->colorspace;
1549
1550 switch (pixfmt) {
1551 case V4L2_PIX_FMT_NV12:
1552 case V4L2_PIX_FMT_NV21:
1553 case V4L2_PIX_FMT_NV16:
1554 case V4L2_PIX_FMT_NV61:
1555 /* FIXME: check against rect_max after converting soc-camera */
1556 /* We can scale precisely, need a bigger image from camera */
1557 if (pix->width < width || pix->height < height) {
1558 /*
1559 * We presume, the sensor behaves sanely, i.e., if
1560 * requested a bigger rectangle, it will not return a
1561 * smaller one.
1562 */
1563 mf->width = pcdev->max_width;
1564 mf->height = pcdev->max_height;
1565 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1566 soc_camera_grp_id(icd), pad,
1567 set_fmt, &pad_cfg, &format);
1568 if (ret < 0) {
1569 /* Shouldn't actually happen... */
1570 dev_err(icd->parent,
1571 "FIXME: client try_fmt() = %d\n", ret);
1572 return ret;
1573 }
1574 }
1575 /* We will scale exactly */
1576 if (mf->width > width)
1577 pix->width = width;
1578 if (mf->height > height)
1579 pix->height = height;
1580
1581 pix->bytesperline = max(pix->bytesperline, pix->width);
1582 pix->bytesperline = min(pix->bytesperline, CEU_CHDW_MAX);
1583 pix->bytesperline &= ~3;
1584 break;
1585
1586 default:
1587 /* Configurable stride isn't supported in pass-through mode. */
1588 pix->bytesperline = 0;
1589 }
1590
1591 pix->width &= ~3;
1592 pix->height &= ~3;
1593 pix->sizeimage = 0;
1594
1595 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1596 __func__, ret, pix->pixelformat, pix->width, pix->height);
1597
1598 return ret;
1599 }
1600
1601 static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1602 const struct v4l2_crop *a)
1603 {
1604 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1605 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1606 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1607 u32 out_width = icd->user_width, out_height = icd->user_height;
1608 int ret;
1609
1610 /* Freeze queue */
1611 pcdev->frozen = 1;
1612 /* Wait for frame */
1613 ret = wait_for_completion_interruptible(&pcdev->complete);
1614 /* Stop the client */
1615 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1616 if (ret < 0)
1617 dev_warn(icd->parent,
1618 "Client failed to stop the stream: %d\n", ret);
1619 else
1620 /* Do the crop, if it fails, there's nothing more we can do */
1621 sh_mobile_ceu_set_crop(icd, a);
1622
1623 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1624
1625 if (icd->user_width != out_width || icd->user_height != out_height) {
1626 struct v4l2_format f = {
1627 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1628 .fmt.pix = {
1629 .width = out_width,
1630 .height = out_height,
1631 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1632 .field = pcdev->field,
1633 .colorspace = icd->colorspace,
1634 },
1635 };
1636 ret = sh_mobile_ceu_set_fmt(icd, &f);
1637 if (!ret && (out_width != f.fmt.pix.width ||
1638 out_height != f.fmt.pix.height))
1639 ret = -EINVAL;
1640 if (!ret) {
1641 icd->user_width = out_width & ~3;
1642 icd->user_height = out_height & ~3;
1643 ret = sh_mobile_ceu_set_bus_param(icd);
1644 }
1645 }
1646
1647 /* Thaw the queue */
1648 pcdev->frozen = 0;
1649 spin_lock_irq(&pcdev->lock);
1650 sh_mobile_ceu_capture(pcdev);
1651 spin_unlock_irq(&pcdev->lock);
1652 /* Start the client */
1653 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1654 return ret;
1655 }
1656
1657 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1658 {
1659 struct soc_camera_device *icd = file->private_data;
1660
1661 return vb2_poll(&icd->vb2_vidq, file, pt);
1662 }
1663
1664 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1665 struct v4l2_capability *cap)
1666 {
1667 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1668 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1669 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1670
1671 return 0;
1672 }
1673
1674 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1675 struct soc_camera_device *icd)
1676 {
1677 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1678
1679 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1680 q->io_modes = VB2_MMAP | VB2_USERPTR;
1681 q->drv_priv = icd;
1682 q->ops = &sh_mobile_ceu_videobuf_ops;
1683 q->mem_ops = &vb2_dma_contig_memops;
1684 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1685 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1686 q->lock = &ici->host_lock;
1687
1688 return vb2_queue_init(q);
1689 }
1690
1691 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1692 .owner = THIS_MODULE,
1693 .add = sh_mobile_ceu_add_device,
1694 .remove = sh_mobile_ceu_remove_device,
1695 .clock_start = sh_mobile_ceu_clock_start,
1696 .clock_stop = sh_mobile_ceu_clock_stop,
1697 .get_formats = sh_mobile_ceu_get_formats,
1698 .put_formats = sh_mobile_ceu_put_formats,
1699 .get_crop = sh_mobile_ceu_get_crop,
1700 .set_crop = sh_mobile_ceu_set_crop,
1701 .set_livecrop = sh_mobile_ceu_set_livecrop,
1702 .set_fmt = sh_mobile_ceu_set_fmt,
1703 .try_fmt = sh_mobile_ceu_try_fmt,
1704 .poll = sh_mobile_ceu_poll,
1705 .querycap = sh_mobile_ceu_querycap,
1706 .set_bus_param = sh_mobile_ceu_set_bus_param,
1707 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1708 };
1709
1710 struct bus_wait {
1711 struct notifier_block notifier;
1712 struct completion completion;
1713 struct device *dev;
1714 };
1715
1716 static int bus_notify(struct notifier_block *nb,
1717 unsigned long action, void *data)
1718 {
1719 struct device *dev = data;
1720 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1721
1722 if (wait->dev != dev)
1723 return NOTIFY_DONE;
1724
1725 switch (action) {
1726 case BUS_NOTIFY_UNBOUND_DRIVER:
1727 /* Protect from module unloading */
1728 wait_for_completion(&wait->completion);
1729 return NOTIFY_OK;
1730 }
1731 return NOTIFY_DONE;
1732 }
1733
1734 static int sh_mobile_ceu_probe(struct platform_device *pdev)
1735 {
1736 struct sh_mobile_ceu_dev *pcdev;
1737 struct resource *res;
1738 void __iomem *base;
1739 unsigned int irq;
1740 int err, i;
1741 struct bus_wait wait = {
1742 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
1743 .notifier.notifier_call = bus_notify,
1744 };
1745 struct sh_mobile_ceu_companion *csi2;
1746
1747 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1748 irq = platform_get_irq(pdev, 0);
1749 if (!res || (int)irq <= 0) {
1750 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1751 return -ENODEV;
1752 }
1753
1754 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1755 if (!pcdev) {
1756 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1757 return -ENOMEM;
1758 }
1759
1760 INIT_LIST_HEAD(&pcdev->capture);
1761 spin_lock_init(&pcdev->lock);
1762 init_completion(&pcdev->complete);
1763
1764 pcdev->pdata = pdev->dev.platform_data;
1765 if (!pcdev->pdata && !pdev->dev.of_node) {
1766 dev_err(&pdev->dev, "CEU platform data not set.\n");
1767 return -EINVAL;
1768 }
1769
1770 /* TODO: implement per-device bus flags */
1771 if (pcdev->pdata) {
1772 pcdev->max_width = pcdev->pdata->max_width;
1773 pcdev->max_height = pcdev->pdata->max_height;
1774 pcdev->flags = pcdev->pdata->flags;
1775 }
1776
1777 if (!pcdev->max_width) {
1778 unsigned int v;
1779 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-width", &v);
1780 if (!err)
1781 pcdev->max_width = v;
1782
1783 if (!pcdev->max_width)
1784 pcdev->max_width = 2560;
1785 }
1786 if (!pcdev->max_height) {
1787 unsigned int v;
1788 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-height", &v);
1789 if (!err)
1790 pcdev->max_height = v;
1791
1792 if (!pcdev->max_height)
1793 pcdev->max_height = 1920;
1794 }
1795
1796 base = devm_ioremap_resource(&pdev->dev, res);
1797 if (IS_ERR(base))
1798 return PTR_ERR(base);
1799
1800 pcdev->irq = irq;
1801 pcdev->base = base;
1802 pcdev->video_limit = 0; /* only enabled if second resource exists */
1803
1804 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1805 if (res) {
1806 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1807 res->start,
1808 resource_size(res),
1809 DMA_MEMORY_MAP |
1810 DMA_MEMORY_EXCLUSIVE);
1811 if (!err) {
1812 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1813 return -ENXIO;
1814 }
1815
1816 pcdev->video_limit = resource_size(res);
1817 }
1818
1819 /* request irq */
1820 err = devm_request_irq(&pdev->dev, pcdev->irq, sh_mobile_ceu_irq,
1821 0, dev_name(&pdev->dev), pcdev);
1822 if (err) {
1823 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1824 goto exit_release_mem;
1825 }
1826
1827 pm_suspend_ignore_children(&pdev->dev, true);
1828 pm_runtime_enable(&pdev->dev);
1829 pm_runtime_resume(&pdev->dev);
1830
1831 pcdev->ici.priv = pcdev;
1832 pcdev->ici.v4l2_dev.dev = &pdev->dev;
1833 pcdev->ici.nr = pdev->id;
1834 pcdev->ici.drv_name = dev_name(&pdev->dev);
1835 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1836 pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE;
1837
1838 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1839 if (IS_ERR(pcdev->alloc_ctx)) {
1840 err = PTR_ERR(pcdev->alloc_ctx);
1841 goto exit_free_clk;
1842 }
1843
1844 if (pcdev->pdata && pcdev->pdata->asd_sizes) {
1845 struct v4l2_async_subdev **asd;
1846 char name[] = "sh-mobile-csi2";
1847 int j;
1848
1849 /*
1850 * CSI2 interfacing: several groups can use CSI2, pick up the
1851 * first one
1852 */
1853 asd = pcdev->pdata->asd;
1854 for (j = 0; pcdev->pdata->asd_sizes[j]; j++) {
1855 for (i = 0; i < pcdev->pdata->asd_sizes[j]; i++, asd++) {
1856 dev_dbg(&pdev->dev, "%s(): subdev #%d, type %u\n",
1857 __func__, i, (*asd)->match_type);
1858 if ((*asd)->match_type == V4L2_ASYNC_MATCH_DEVNAME &&
1859 !strncmp(name, (*asd)->match.device_name.name,
1860 sizeof(name) - 1)) {
1861 pcdev->csi2_asd = *asd;
1862 break;
1863 }
1864 }
1865 if (pcdev->csi2_asd)
1866 break;
1867 }
1868
1869 pcdev->ici.asd = pcdev->pdata->asd;
1870 pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
1871 }
1872
1873 /* Legacy CSI2 interfacing */
1874 csi2 = pcdev->pdata ? pcdev->pdata->csi2 : NULL;
1875 if (csi2) {
1876 /*
1877 * TODO: remove this once all users are converted to
1878 * asynchronous CSI2 probing. If it has to be kept, csi2
1879 * platform device resources have to be added, using
1880 * platform_device_add_resources()
1881 */
1882 struct platform_device *csi2_pdev =
1883 platform_device_alloc("sh-mobile-csi2", csi2->id);
1884 struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
1885
1886 if (!csi2_pdev) {
1887 err = -ENOMEM;
1888 goto exit_free_ctx;
1889 }
1890
1891 pcdev->csi2_pdev = csi2_pdev;
1892
1893 err = platform_device_add_data(csi2_pdev, csi2_pdata,
1894 sizeof(*csi2_pdata));
1895 if (err < 0)
1896 goto exit_pdev_put;
1897
1898 csi2_pdev->resource = csi2->resource;
1899 csi2_pdev->num_resources = csi2->num_resources;
1900
1901 err = platform_device_add(csi2_pdev);
1902 if (err < 0)
1903 goto exit_pdev_put;
1904
1905 wait.dev = &csi2_pdev->dev;
1906
1907 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
1908 if (err < 0)
1909 goto exit_pdev_unregister;
1910
1911 /*
1912 * From this point the driver module will not unload, until
1913 * we complete the completion.
1914 */
1915
1916 if (!csi2_pdev->dev.driver) {
1917 complete(&wait.completion);
1918 /* Either too late, or probing failed */
1919 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
1920 err = -ENXIO;
1921 goto exit_pdev_unregister;
1922 }
1923
1924 /*
1925 * The module is still loaded, in the worst case it is hanging
1926 * in device release on our completion. So, _now_ dereferencing
1927 * the "owner" is safe!
1928 */
1929
1930 err = try_module_get(csi2_pdev->dev.driver->owner);
1931
1932 /* Let notifier complete, if it has been locked */
1933 complete(&wait.completion);
1934 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
1935 if (!err) {
1936 err = -ENODEV;
1937 goto exit_pdev_unregister;
1938 }
1939
1940 pcdev->csi2_sd = platform_get_drvdata(csi2_pdev);
1941 }
1942
1943 err = soc_camera_host_register(&pcdev->ici);
1944 if (err)
1945 goto exit_csi2_unregister;
1946
1947 if (csi2) {
1948 err = v4l2_device_register_subdev(&pcdev->ici.v4l2_dev,
1949 pcdev->csi2_sd);
1950 dev_dbg(&pdev->dev, "%s(): ret(register_subdev) = %d\n",
1951 __func__, err);
1952 if (err < 0)
1953 goto exit_host_unregister;
1954 /* v4l2_device_register_subdev() took a reference too */
1955 module_put(pcdev->csi2_sd->owner);
1956 }
1957
1958 return 0;
1959
1960 exit_host_unregister:
1961 soc_camera_host_unregister(&pcdev->ici);
1962 exit_csi2_unregister:
1963 if (csi2) {
1964 module_put(pcdev->csi2_pdev->dev.driver->owner);
1965 exit_pdev_unregister:
1966 platform_device_del(pcdev->csi2_pdev);
1967 exit_pdev_put:
1968 pcdev->csi2_pdev->resource = NULL;
1969 platform_device_put(pcdev->csi2_pdev);
1970 }
1971 exit_free_ctx:
1972 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1973 exit_free_clk:
1974 pm_runtime_disable(&pdev->dev);
1975 exit_release_mem:
1976 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1977 dma_release_declared_memory(&pdev->dev);
1978 return err;
1979 }
1980
1981 static int sh_mobile_ceu_remove(struct platform_device *pdev)
1982 {
1983 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1984 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
1985 struct sh_mobile_ceu_dev, ici);
1986 struct platform_device *csi2_pdev = pcdev->csi2_pdev;
1987
1988 soc_camera_host_unregister(soc_host);
1989 pm_runtime_disable(&pdev->dev);
1990 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1991 dma_release_declared_memory(&pdev->dev);
1992 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1993 if (csi2_pdev && csi2_pdev->dev.driver) {
1994 struct module *csi2_drv = csi2_pdev->dev.driver->owner;
1995 platform_device_del(csi2_pdev);
1996 csi2_pdev->resource = NULL;
1997 platform_device_put(csi2_pdev);
1998 module_put(csi2_drv);
1999 }
2000
2001 return 0;
2002 }
2003
2004 static int sh_mobile_ceu_runtime_nop(struct device *dev)
2005 {
2006 /* Runtime PM callback shared between ->runtime_suspend()
2007 * and ->runtime_resume(). Simply returns success.
2008 *
2009 * This driver re-initializes all registers after
2010 * pm_runtime_get_sync() anyway so there is no need
2011 * to save and restore registers here.
2012 */
2013 return 0;
2014 }
2015
2016 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2017 .runtime_suspend = sh_mobile_ceu_runtime_nop,
2018 .runtime_resume = sh_mobile_ceu_runtime_nop,
2019 };
2020
2021 static const struct of_device_id sh_mobile_ceu_of_match[] = {
2022 { .compatible = "renesas,sh-mobile-ceu" },
2023 { }
2024 };
2025 MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
2026
2027 static struct platform_driver sh_mobile_ceu_driver = {
2028 .driver = {
2029 .name = "sh_mobile_ceu",
2030 .pm = &sh_mobile_ceu_dev_pm_ops,
2031 .of_match_table = sh_mobile_ceu_of_match,
2032 },
2033 .probe = sh_mobile_ceu_probe,
2034 .remove = sh_mobile_ceu_remove,
2035 };
2036
2037 static int __init sh_mobile_ceu_init(void)
2038 {
2039 /* Whatever return code */
2040 request_module("sh_mobile_csi2");
2041 return platform_driver_register(&sh_mobile_ceu_driver);
2042 }
2043
2044 static void __exit sh_mobile_ceu_exit(void)
2045 {
2046 platform_driver_unregister(&sh_mobile_ceu_driver);
2047 }
2048
2049 module_init(sh_mobile_ceu_init);
2050 module_exit(sh_mobile_ceu_exit);
2051
2052 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2053 MODULE_AUTHOR("Magnus Damm");
2054 MODULE_LICENSE("GPL");
2055 MODULE_VERSION("0.1.0");
2056 MODULE_ALIAS("platform:sh_mobile_ceu");
Linux kernel - Deliverables
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