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Merge remote-tracking branch 'mkp-scsi/4.8/scsi-fixes' into fixes
[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/drv-intf/sh_mobile_ceu.h>
44 #include <media/drv-intf/sh_mobile_csi2.h>
45 #include <media/videobuf2-dma-contig.h>
46 #include <media/v4l2-mediabus.h>
47 #include <media/drv-intf/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_v4l2_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_v4l2_buffer *active;
116
117 struct sh_mobile_ceu_info *pdata;
118 struct completion complete;
119
120 u32 cflcr;
121
122 /* static max sizes either from platform data or default */
123 int max_width;
124 int max_height;
125
126 enum v4l2_field field;
127 int sequence;
128 unsigned long flags;
129
130 unsigned int image_mode:1;
131 unsigned int is_16bit:1;
132 unsigned int frozen:1;
133 };
134
135 struct sh_mobile_ceu_cam {
136 /* CEU offsets within the camera output, before the CEU scaler */
137 unsigned int ceu_left;
138 unsigned int ceu_top;
139 /* Client output, as seen by the CEU */
140 unsigned int width;
141 unsigned int height;
142 /*
143 * User window from S_CROP / G_CROP, produced by client cropping and
144 * scaling, CEU scaling and CEU cropping, mapped back onto the client
145 * input window
146 */
147 struct v4l2_rect subrect;
148 /* Camera cropping rectangle */
149 struct v4l2_rect rect;
150 const struct soc_mbus_pixelfmt *extra_fmt;
151 u32 code;
152 };
153
154 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_v4l2_buffer *vbuf)
155 {
156 return container_of(vbuf, struct sh_mobile_ceu_buffer, vb);
157 }
158
159 static void ceu_write(struct sh_mobile_ceu_dev *priv,
160 unsigned long reg_offs, u32 data)
161 {
162 iowrite32(data, priv->base + reg_offs);
163 }
164
165 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
166 {
167 return ioread32(priv->base + reg_offs);
168 }
169
170 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
171 {
172 int i, success = 0;
173
174 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
175
176 /* wait CSTSR.CPTON bit */
177 for (i = 0; i < 1000; i++) {
178 if (!(ceu_read(pcdev, CSTSR) & 1)) {
179 success++;
180 break;
181 }
182 udelay(1);
183 }
184
185 /* wait CAPSR.CPKIL bit */
186 for (i = 0; i < 1000; i++) {
187 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
188 success++;
189 break;
190 }
191 udelay(1);
192 }
193
194 if (2 != success) {
195 dev_warn(pcdev->ici.v4l2_dev.dev, "soft reset time out\n");
196 return -EIO;
197 }
198
199 return 0;
200 }
201
202 /*
203 * Videobuf operations
204 */
205
206 /*
207 * .queue_setup() is called to check, whether the driver can accept the
208 * requested number of buffers and to fill in plane sizes
209 * for the current frame format if required
210 */
211 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
212 unsigned int *count, unsigned int *num_planes,
213 unsigned int sizes[], struct device *alloc_devs[])
214 {
215 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
216 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
217 struct sh_mobile_ceu_dev *pcdev = ici->priv;
218
219 if (!vq->num_buffers)
220 pcdev->sequence = 0;
221
222 if (!*count)
223 *count = 2;
224
225 /* Called from VIDIOC_REQBUFS or in compatibility mode */
226 if (!*num_planes)
227 sizes[0] = icd->sizeimage;
228 else if (sizes[0] < icd->sizeimage)
229 return -EINVAL;
230
231 /* If *num_planes != 0, we have already verified *count. */
232 if (pcdev->video_limit) {
233 size_t size = PAGE_ALIGN(sizes[0]) * *count;
234
235 if (size + pcdev->buf_total > pcdev->video_limit)
236 *count = (pcdev->video_limit - pcdev->buf_total) /
237 PAGE_ALIGN(sizes[0]);
238 }
239
240 *num_planes = 1;
241
242 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
243
244 return 0;
245 }
246
247 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
248 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
249 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
250 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
251 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
252 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
253
254
255 /*
256 * return value doesn't reflex the success/failure to queue the new buffer,
257 * but rather the status of the previous buffer.
258 */
259 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
260 {
261 struct soc_camera_device *icd = pcdev->ici.icd;
262 dma_addr_t phys_addr_top, phys_addr_bottom;
263 unsigned long top1, top2;
264 unsigned long bottom1, bottom2;
265 u32 status;
266 bool planar;
267 int ret = 0;
268
269 /*
270 * The hardware is _very_ picky about this sequence. Especially
271 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
272 * several not-so-well documented interrupt sources in CETCR.
273 */
274 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
275 status = ceu_read(pcdev, CETCR);
276 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
277 if (!pcdev->frozen)
278 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
279 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
280 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
281
282 /*
283 * When a VBP interrupt occurs, a capture end interrupt does not occur
284 * and the image of that frame is not captured correctly. So, soft reset
285 * is needed here.
286 */
287 if (status & CEU_CEIER_VBP) {
288 sh_mobile_ceu_soft_reset(pcdev);
289 ret = -EIO;
290 }
291
292 if (pcdev->frozen) {
293 complete(&pcdev->complete);
294 return ret;
295 }
296
297 if (!pcdev->active)
298 return ret;
299
300 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
301 top1 = CDBYR;
302 top2 = CDBCR;
303 bottom1 = CDAYR;
304 bottom2 = CDACR;
305 } else {
306 top1 = CDAYR;
307 top2 = CDACR;
308 bottom1 = CDBYR;
309 bottom2 = CDBCR;
310 }
311
312 phys_addr_top =
313 vb2_dma_contig_plane_dma_addr(&pcdev->active->vb2_buf, 0);
314
315 switch (icd->current_fmt->host_fmt->fourcc) {
316 case V4L2_PIX_FMT_NV12:
317 case V4L2_PIX_FMT_NV21:
318 case V4L2_PIX_FMT_NV16:
319 case V4L2_PIX_FMT_NV61:
320 planar = true;
321 break;
322 default:
323 planar = false;
324 }
325
326 ceu_write(pcdev, top1, phys_addr_top);
327 if (V4L2_FIELD_NONE != pcdev->field) {
328 phys_addr_bottom = phys_addr_top + icd->bytesperline;
329 ceu_write(pcdev, bottom1, phys_addr_bottom);
330 }
331
332 if (planar) {
333 phys_addr_top += icd->bytesperline * icd->user_height;
334 ceu_write(pcdev, top2, phys_addr_top);
335 if (V4L2_FIELD_NONE != pcdev->field) {
336 phys_addr_bottom = phys_addr_top + icd->bytesperline;
337 ceu_write(pcdev, bottom2, phys_addr_bottom);
338 }
339 }
340
341 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
342
343 return ret;
344 }
345
346 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
347 {
348 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
349 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
350
351 /* Added list head initialization on alloc */
352 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
353
354 return 0;
355 }
356
357 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
358 {
359 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
360 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
361 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
362 struct sh_mobile_ceu_dev *pcdev = ici->priv;
363 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
364 unsigned long size;
365
366 size = icd->sizeimage;
367
368 if (vb2_plane_size(vb, 0) < size) {
369 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
370 vb->index, vb2_plane_size(vb, 0), size);
371 goto error;
372 }
373
374 vb2_set_plane_payload(vb, 0, size);
375
376 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
377 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
378
379 #ifdef DEBUG
380 /*
381 * This can be useful if you want to see if we actually fill
382 * the buffer with something
383 */
384 if (vb2_plane_vaddr(vb, 0))
385 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
386 #endif
387
388 spin_lock_irq(&pcdev->lock);
389 list_add_tail(&buf->queue, &pcdev->capture);
390
391 if (!pcdev->active) {
392 /*
393 * Because there were no active buffer at this moment,
394 * we are not interested in the return value of
395 * sh_mobile_ceu_capture here.
396 */
397 pcdev->active = vbuf;
398 sh_mobile_ceu_capture(pcdev);
399 }
400 spin_unlock_irq(&pcdev->lock);
401
402 return;
403
404 error:
405 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
406 }
407
408 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
409 {
410 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
411 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
412 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
413 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
414 struct sh_mobile_ceu_dev *pcdev = ici->priv;
415
416 spin_lock_irq(&pcdev->lock);
417
418 if (pcdev->active == vbuf) {
419 /* disable capture (release DMA buffer), reset */
420 ceu_write(pcdev, CAPSR, 1 << 16);
421 pcdev->active = NULL;
422 }
423
424 /*
425 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
426 * buffer failed, and .buf_init() hasn't been called
427 */
428 if (buf->queue.next)
429 list_del_init(&buf->queue);
430
431 pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
432 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
433 pcdev->buf_total);
434
435 spin_unlock_irq(&pcdev->lock);
436 }
437
438 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
439 {
440 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
441 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
442 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
443 struct sh_mobile_ceu_dev *pcdev = ici->priv;
444
445 pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
446 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
447 pcdev->buf_total);
448
449 /* This is for locking debugging only */
450 INIT_LIST_HEAD(&to_ceu_vb(vbuf)->queue);
451 return 0;
452 }
453
454 static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
455 {
456 struct soc_camera_device *icd = soc_camera_from_vb2q(q);
457 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
458 struct sh_mobile_ceu_dev *pcdev = ici->priv;
459 struct list_head *buf_head, *tmp;
460
461 spin_lock_irq(&pcdev->lock);
462
463 pcdev->active = NULL;
464
465 list_for_each_safe(buf_head, tmp, &pcdev->capture)
466 list_del_init(buf_head);
467
468 spin_unlock_irq(&pcdev->lock);
469
470 sh_mobile_ceu_soft_reset(pcdev);
471 }
472
473 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
474 .queue_setup = sh_mobile_ceu_videobuf_setup,
475 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
476 .buf_queue = sh_mobile_ceu_videobuf_queue,
477 .buf_cleanup = sh_mobile_ceu_videobuf_release,
478 .buf_init = sh_mobile_ceu_videobuf_init,
479 .wait_prepare = vb2_ops_wait_prepare,
480 .wait_finish = vb2_ops_wait_finish,
481 .stop_streaming = sh_mobile_ceu_stop_streaming,
482 };
483
484 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
485 {
486 struct sh_mobile_ceu_dev *pcdev = data;
487 struct vb2_v4l2_buffer *vbuf;
488 int ret;
489
490 spin_lock(&pcdev->lock);
491
492 vbuf = pcdev->active;
493 if (!vbuf)
494 /* Stale interrupt from a released buffer */
495 goto out;
496
497 list_del_init(&to_ceu_vb(vbuf)->queue);
498
499 if (!list_empty(&pcdev->capture))
500 pcdev->active = &list_entry(pcdev->capture.next,
501 struct sh_mobile_ceu_buffer, queue)->vb;
502 else
503 pcdev->active = NULL;
504
505 ret = sh_mobile_ceu_capture(pcdev);
506 vbuf->vb2_buf.timestamp = ktime_get_ns();
507 if (!ret) {
508 vbuf->field = pcdev->field;
509 vbuf->sequence = pcdev->sequence++;
510 }
511 vb2_buffer_done(&vbuf->vb2_buf,
512 ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
513
514 out:
515 spin_unlock(&pcdev->lock);
516
517 return IRQ_HANDLED;
518 }
519
520 static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
521 {
522 struct v4l2_subdev *sd;
523
524 if (pcdev->csi2_sd)
525 return pcdev->csi2_sd;
526
527 if (pcdev->csi2_asd) {
528 char name[] = "sh-mobile-csi2";
529 v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
530 if (!strncmp(name, sd->name, sizeof(name) - 1)) {
531 pcdev->csi2_sd = sd;
532 return sd;
533 }
534 }
535
536 return NULL;
537 }
538
539 static struct v4l2_subdev *csi2_subdev(struct sh_mobile_ceu_dev *pcdev,
540 struct soc_camera_device *icd)
541 {
542 struct v4l2_subdev *sd = pcdev->csi2_sd;
543
544 return sd && sd->grp_id == soc_camera_grp_id(icd) ? sd : NULL;
545 }
546
547 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
548 {
549 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
550 struct sh_mobile_ceu_dev *pcdev = ici->priv;
551 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
552 int ret;
553
554 if (csi2_sd) {
555 csi2_sd->grp_id = soc_camera_grp_id(icd);
556 v4l2_set_subdev_hostdata(csi2_sd, icd);
557 }
558
559 ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
560 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
561 return ret;
562
563 /*
564 * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver
565 * has not found this soc-camera device among its clients
566 */
567 if (csi2_sd && ret == -ENODEV)
568 csi2_sd->grp_id = 0;
569
570 dev_info(icd->parent,
571 "SuperH Mobile CEU%s driver attached to camera %d\n",
572 csi2_sd && csi2_sd->grp_id ? "/CSI-2" : "", icd->devnum);
573
574 return 0;
575 }
576
577 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
578 {
579 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
580 struct sh_mobile_ceu_dev *pcdev = ici->priv;
581 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
582
583 dev_info(icd->parent,
584 "SuperH Mobile CEU driver detached from camera %d\n",
585 icd->devnum);
586
587 v4l2_subdev_call(csi2_sd, core, s_power, 0);
588 }
589
590 /* Called with .host_lock held */
591 static int sh_mobile_ceu_clock_start(struct soc_camera_host *ici)
592 {
593 struct sh_mobile_ceu_dev *pcdev = ici->priv;
594
595 pm_runtime_get_sync(ici->v4l2_dev.dev);
596
597 pcdev->buf_total = 0;
598
599 sh_mobile_ceu_soft_reset(pcdev);
600
601 return 0;
602 }
603
604 /* Called with .host_lock held */
605 static void sh_mobile_ceu_clock_stop(struct soc_camera_host *ici)
606 {
607 struct sh_mobile_ceu_dev *pcdev = ici->priv;
608
609 /* disable capture, disable interrupts */
610 ceu_write(pcdev, CEIER, 0);
611 sh_mobile_ceu_soft_reset(pcdev);
612
613 /* make sure active buffer is canceled */
614 spin_lock_irq(&pcdev->lock);
615 if (pcdev->active) {
616 list_del_init(&to_ceu_vb(pcdev->active)->queue);
617 vb2_buffer_done(&pcdev->active->vb2_buf, VB2_BUF_STATE_ERROR);
618 pcdev->active = NULL;
619 }
620 spin_unlock_irq(&pcdev->lock);
621
622 pm_runtime_put(ici->v4l2_dev.dev);
623 }
624
625 /*
626 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
627 * in SH7722 Hardware Manual
628 */
629 static unsigned int size_dst(unsigned int src, unsigned int scale)
630 {
631 unsigned int mant_pre = scale >> 12;
632 if (!src || !scale)
633 return src;
634 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
635 mant_pre * 4096 / scale + 1;
636 }
637
638 static u16 calc_scale(unsigned int src, unsigned int *dst)
639 {
640 u16 scale;
641
642 if (src == *dst)
643 return 0;
644
645 scale = (src * 4096 / *dst) & ~7;
646
647 while (scale > 4096 && size_dst(src, scale) < *dst)
648 scale -= 8;
649
650 *dst = size_dst(src, scale);
651
652 return scale;
653 }
654
655 /* rect is guaranteed to not exceed the scaled camera rectangle */
656 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
657 {
658 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
659 struct sh_mobile_ceu_cam *cam = icd->host_priv;
660 struct sh_mobile_ceu_dev *pcdev = ici->priv;
661 unsigned int height, width, cdwdr_width, in_width, in_height;
662 unsigned int left_offset, top_offset;
663 u32 camor;
664
665 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
666 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
667
668 left_offset = cam->ceu_left;
669 top_offset = cam->ceu_top;
670
671 WARN_ON(icd->user_width & 3 || icd->user_height & 3);
672
673 width = icd->user_width;
674
675 if (pcdev->image_mode) {
676 in_width = cam->width;
677 if (!pcdev->is_16bit) {
678 in_width *= 2;
679 left_offset *= 2;
680 }
681 } else {
682 unsigned int w_factor;
683
684 switch (icd->current_fmt->host_fmt->packing) {
685 case SOC_MBUS_PACKING_2X8_PADHI:
686 w_factor = 2;
687 break;
688 default:
689 w_factor = 1;
690 }
691
692 in_width = cam->width * w_factor;
693 left_offset *= w_factor;
694 }
695
696 cdwdr_width = icd->bytesperline;
697
698 height = icd->user_height;
699 in_height = cam->height;
700 if (V4L2_FIELD_NONE != pcdev->field) {
701 height = (height / 2) & ~3;
702 in_height /= 2;
703 top_offset /= 2;
704 cdwdr_width *= 2;
705 }
706
707 /* CSI2 special configuration */
708 if (csi2_subdev(pcdev, icd)) {
709 in_width = ((in_width - 2) * 2);
710 left_offset *= 2;
711 }
712
713 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
714 camor = left_offset | (top_offset << 16);
715
716 dev_geo(icd->parent,
717 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
718 (in_height << 16) | in_width, (height << 16) | width,
719 cdwdr_width);
720
721 ceu_write(pcdev, CAMOR, camor);
722 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
723 /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
724 ceu_write(pcdev, CFSZR, (height << 16) | width);
725 ceu_write(pcdev, CDWDR, cdwdr_width);
726 }
727
728 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
729 {
730 u32 capsr = ceu_read(pcdev, CAPSR);
731 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
732 return capsr;
733 }
734
735 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
736 {
737 unsigned long timeout = jiffies + 10 * HZ;
738
739 /*
740 * Wait until the end of the current frame. It can take a long time,
741 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
742 */
743 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
744 msleep(1);
745
746 if (time_after(jiffies, timeout)) {
747 dev_err(pcdev->ici.v4l2_dev.dev,
748 "Timeout waiting for frame end! Interface problem?\n");
749 return;
750 }
751
752 /* Wait until reset clears, this shall not hang... */
753 while (ceu_read(pcdev, CAPSR) & (1 << 16))
754 udelay(10);
755
756 /* Anything to restore? */
757 if (capsr & ~(1 << 16))
758 ceu_write(pcdev, CAPSR, capsr);
759 }
760
761 /* Find the bus subdevice driver, e.g., CSI2 */
762 static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
763 struct soc_camera_device *icd)
764 {
765 return csi2_subdev(pcdev, icd) ? : soc_camera_to_subdev(icd);
766 }
767
768 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \
769 V4L2_MBUS_PCLK_SAMPLE_RISING | \
770 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
771 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
772 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
773 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
774 V4L2_MBUS_DATA_ACTIVE_HIGH)
775
776 /* Capture is not running, no interrupts, no locking needed */
777 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
778 {
779 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
780 struct sh_mobile_ceu_dev *pcdev = ici->priv;
781 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
782 struct sh_mobile_ceu_cam *cam = icd->host_priv;
783 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
784 unsigned long value, common_flags = CEU_BUS_FLAGS;
785 u32 capsr = capture_save_reset(pcdev);
786 unsigned int yuv_lineskip;
787 int ret;
788
789 /*
790 * If the client doesn't implement g_mbus_config, we just use our
791 * platform data
792 */
793 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
794 if (!ret) {
795 common_flags = soc_mbus_config_compatible(&cfg,
796 common_flags);
797 if (!common_flags)
798 return -EINVAL;
799 } else if (ret != -ENOIOCTLCMD) {
800 return ret;
801 }
802
803 /* Make choises, based on platform preferences */
804 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
805 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
806 if (pcdev->flags & SH_CEU_FLAG_HSYNC_LOW)
807 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
808 else
809 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
810 }
811
812 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
813 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
814 if (pcdev->flags & SH_CEU_FLAG_VSYNC_LOW)
815 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
816 else
817 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
818 }
819
820 cfg.flags = common_flags;
821 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
822 if (ret < 0 && ret != -ENOIOCTLCMD)
823 return ret;
824
825 if (icd->current_fmt->host_fmt->bits_per_sample > 8)
826 pcdev->is_16bit = 1;
827 else
828 pcdev->is_16bit = 0;
829
830 ceu_write(pcdev, CRCNTR, 0);
831 ceu_write(pcdev, CRCMPR, 0);
832
833 value = 0x00000010; /* data fetch by default */
834 yuv_lineskip = 0x10;
835
836 switch (icd->current_fmt->host_fmt->fourcc) {
837 case V4L2_PIX_FMT_NV12:
838 case V4L2_PIX_FMT_NV21:
839 /* convert 4:2:2 -> 4:2:0 */
840 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
841 /* fall-through */
842 case V4L2_PIX_FMT_NV16:
843 case V4L2_PIX_FMT_NV61:
844 switch (cam->code) {
845 case MEDIA_BUS_FMT_UYVY8_2X8:
846 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
847 break;
848 case MEDIA_BUS_FMT_VYUY8_2X8:
849 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
850 break;
851 case MEDIA_BUS_FMT_YUYV8_2X8:
852 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
853 break;
854 case MEDIA_BUS_FMT_YVYU8_2X8:
855 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
856 break;
857 default:
858 BUG();
859 }
860 }
861
862 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
863 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
864 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
865
866 value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
867 value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
868
869 if (csi2_subdev(pcdev, icd)) /* CSI2 mode */
870 value |= 3 << 12;
871 else if (pcdev->is_16bit)
872 value |= 1 << 12;
873 else if (pcdev->flags & SH_CEU_FLAG_LOWER_8BIT)
874 value |= 2 << 12;
875
876 ceu_write(pcdev, CAMCR, value);
877
878 ceu_write(pcdev, CAPCR, 0x00300000);
879
880 switch (pcdev->field) {
881 case V4L2_FIELD_INTERLACED_TB:
882 value = 0x101;
883 break;
884 case V4L2_FIELD_INTERLACED_BT:
885 value = 0x102;
886 break;
887 default:
888 value = 0;
889 break;
890 }
891 ceu_write(pcdev, CAIFR, value);
892
893 sh_mobile_ceu_set_rect(icd);
894 mdelay(1);
895
896 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
897 ceu_write(pcdev, CFLCR, pcdev->cflcr);
898
899 /*
900 * A few words about byte order (observed in Big Endian mode)
901 *
902 * In data fetch mode bytes are received in chunks of 8 bytes.
903 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
904 *
905 * The data is however by default written to memory in reverse order:
906 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
907 *
908 * The lowest three bits of CDOCR allows us to do swapping,
909 * using 7 we swap the data bytes to match the incoming order:
910 * D0, D1, D2, D3, D4, D5, D6, D7
911 */
912 value = 0x00000007 | yuv_lineskip;
913
914 ceu_write(pcdev, CDOCR, value);
915 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
916
917 capture_restore(pcdev, capsr);
918
919 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
920 return 0;
921 }
922
923 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
924 unsigned char buswidth)
925 {
926 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
927 struct sh_mobile_ceu_dev *pcdev = ici->priv;
928 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
929 unsigned long common_flags = CEU_BUS_FLAGS;
930 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
931 int ret;
932
933 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
934 if (!ret)
935 common_flags = soc_mbus_config_compatible(&cfg,
936 common_flags);
937 else if (ret != -ENOIOCTLCMD)
938 return ret;
939
940 if (!common_flags || buswidth > 16)
941 return -EINVAL;
942
943 return 0;
944 }
945
946 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
947 {
948 .fourcc = V4L2_PIX_FMT_NV12,
949 .name = "NV12",
950 .bits_per_sample = 8,
951 .packing = SOC_MBUS_PACKING_1_5X8,
952 .order = SOC_MBUS_ORDER_LE,
953 .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
954 }, {
955 .fourcc = V4L2_PIX_FMT_NV21,
956 .name = "NV21",
957 .bits_per_sample = 8,
958 .packing = SOC_MBUS_PACKING_1_5X8,
959 .order = SOC_MBUS_ORDER_LE,
960 .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
961 }, {
962 .fourcc = V4L2_PIX_FMT_NV16,
963 .name = "NV16",
964 .bits_per_sample = 8,
965 .packing = SOC_MBUS_PACKING_2X8_PADHI,
966 .order = SOC_MBUS_ORDER_LE,
967 .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
968 }, {
969 .fourcc = V4L2_PIX_FMT_NV61,
970 .name = "NV61",
971 .bits_per_sample = 8,
972 .packing = SOC_MBUS_PACKING_2X8_PADHI,
973 .order = SOC_MBUS_ORDER_LE,
974 .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
975 },
976 };
977
978 /* This will be corrected as we get more formats */
979 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
980 {
981 return fmt->packing == SOC_MBUS_PACKING_NONE ||
982 (fmt->bits_per_sample == 8 &&
983 fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
984 (fmt->bits_per_sample == 8 &&
985 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
986 (fmt->bits_per_sample > 8 &&
987 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
988 }
989
990 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
991 {
992 return container_of(ctrl->handler, struct soc_camera_device,
993 ctrl_handler);
994 }
995
996 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
997 {
998 struct soc_camera_device *icd = ctrl_to_icd(ctrl);
999 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1000 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1001
1002 switch (ctrl->id) {
1003 case V4L2_CID_SHARPNESS:
1004 switch (icd->current_fmt->host_fmt->fourcc) {
1005 case V4L2_PIX_FMT_NV12:
1006 case V4L2_PIX_FMT_NV21:
1007 case V4L2_PIX_FMT_NV16:
1008 case V4L2_PIX_FMT_NV61:
1009 ceu_write(pcdev, CLFCR, !ctrl->val);
1010 return 0;
1011 }
1012 break;
1013 }
1014
1015 return -EINVAL;
1016 }
1017
1018 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
1019 .s_ctrl = sh_mobile_ceu_s_ctrl,
1020 };
1021
1022 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
1023 struct soc_camera_format_xlate *xlate)
1024 {
1025 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1026 struct device *dev = icd->parent;
1027 struct soc_camera_host *ici = to_soc_camera_host(dev);
1028 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1029 int ret, k, n;
1030 int formats = 0;
1031 struct sh_mobile_ceu_cam *cam;
1032 struct v4l2_subdev_mbus_code_enum code = {
1033 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1034 .index = idx,
1035 };
1036 const struct soc_mbus_pixelfmt *fmt;
1037
1038 ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
1039 if (ret < 0)
1040 /* No more formats */
1041 return 0;
1042
1043 fmt = soc_mbus_get_fmtdesc(code.code);
1044 if (!fmt) {
1045 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code.code);
1046 return 0;
1047 }
1048
1049 if (!csi2_subdev(pcdev, icd)) {
1050 /* Are there any restrictions in the CSI-2 case? */
1051 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
1052 if (ret < 0)
1053 return 0;
1054 }
1055
1056 if (!icd->host_priv) {
1057 struct v4l2_subdev_format fmt = {
1058 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1059 };
1060 struct v4l2_mbus_framefmt *mf = &fmt.format;
1061 struct v4l2_rect rect;
1062 int shift = 0;
1063
1064 /* Add our control */
1065 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
1066 V4L2_CID_SHARPNESS, 0, 1, 1, 1);
1067 if (icd->ctrl_handler.error)
1068 return icd->ctrl_handler.error;
1069
1070 /* FIXME: subwindow is lost between close / open */
1071
1072 /* Cache current client geometry */
1073 ret = soc_camera_client_g_rect(sd, &rect);
1074 if (ret < 0)
1075 return ret;
1076
1077 /* First time */
1078 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1079 if (ret < 0)
1080 return ret;
1081
1082 /*
1083 * All currently existing CEU implementations support 2560x1920
1084 * or larger frames. If the sensor is proposing too big a frame,
1085 * don't bother with possibly supportred by the CEU larger
1086 * sizes, just try VGA multiples. If needed, this can be
1087 * adjusted in the future.
1088 */
1089 while ((mf->width > pcdev->max_width ||
1090 mf->height > pcdev->max_height) && shift < 4) {
1091 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1092 mf->width = 2560 >> shift;
1093 mf->height = 1920 >> shift;
1094 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1095 soc_camera_grp_id(icd), pad,
1096 set_fmt, NULL, &fmt);
1097 if (ret < 0)
1098 return ret;
1099 shift++;
1100 }
1101
1102 if (shift == 4) {
1103 dev_err(dev, "Failed to configure the client below %ux%x\n",
1104 mf->width, mf->height);
1105 return -EIO;
1106 }
1107
1108 dev_geo(dev, "camera fmt %ux%u\n", mf->width, mf->height);
1109
1110 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1111 if (!cam)
1112 return -ENOMEM;
1113
1114 /* We are called with current camera crop, initialise subrect with it */
1115 cam->rect = rect;
1116 cam->subrect = rect;
1117
1118 cam->width = mf->width;
1119 cam->height = mf->height;
1120
1121 icd->host_priv = cam;
1122 } else {
1123 cam = icd->host_priv;
1124 }
1125
1126 /* Beginning of a pass */
1127 if (!idx)
1128 cam->extra_fmt = NULL;
1129
1130 switch (code.code) {
1131 case MEDIA_BUS_FMT_UYVY8_2X8:
1132 case MEDIA_BUS_FMT_VYUY8_2X8:
1133 case MEDIA_BUS_FMT_YUYV8_2X8:
1134 case MEDIA_BUS_FMT_YVYU8_2X8:
1135 if (cam->extra_fmt)
1136 break;
1137
1138 /*
1139 * Our case is simple so far: for any of the above four camera
1140 * formats we add all our four synthesized NV* formats, so,
1141 * just marking the device with a single flag suffices. If
1142 * the format generation rules are more complex, you would have
1143 * to actually hang your already added / counted formats onto
1144 * the host_priv pointer and check whether the format you're
1145 * going to add now is already there.
1146 */
1147 cam->extra_fmt = sh_mobile_ceu_formats;
1148
1149 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1150 formats += n;
1151 for (k = 0; xlate && k < n; k++) {
1152 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1153 xlate->code = code.code;
1154 xlate++;
1155 dev_dbg(dev, "Providing format %s using code %d\n",
1156 sh_mobile_ceu_formats[k].name, code.code);
1157 }
1158 break;
1159 default:
1160 if (!sh_mobile_ceu_packing_supported(fmt))
1161 return 0;
1162 }
1163
1164 /* Generic pass-through */
1165 formats++;
1166 if (xlate) {
1167 xlate->host_fmt = fmt;
1168 xlate->code = code.code;
1169 xlate++;
1170 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1171 fmt->name);
1172 }
1173
1174 return formats;
1175 }
1176
1177 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1178 {
1179 kfree(icd->host_priv);
1180 icd->host_priv = NULL;
1181 }
1182
1183 #define scale_down(size, scale) soc_camera_shift_scale(size, 12, scale)
1184 #define calc_generic_scale(in, out) soc_camera_calc_scale(in, 12, out)
1185
1186 /*
1187 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1188 * framerate by always requesting the maximum image from the client. See
1189 * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1190 * scaling and cropping algorithms and for the meaning of referenced here steps.
1191 */
1192 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1193 const struct v4l2_crop *a)
1194 {
1195 struct v4l2_crop a_writable = *a;
1196 const struct v4l2_rect *rect = &a_writable.c;
1197 struct device *dev = icd->parent;
1198 struct soc_camera_host *ici = to_soc_camera_host(dev);
1199 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1200 struct v4l2_crop cam_crop;
1201 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1202 struct v4l2_rect *cam_rect = &cam_crop.c;
1203 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1204 struct v4l2_subdev_format fmt = {
1205 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1206 };
1207 struct v4l2_mbus_framefmt *mf = &fmt.format;
1208 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1209 out_width, out_height;
1210 int interm_width, interm_height;
1211 u32 capsr, cflcr;
1212 int ret;
1213
1214 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1215 rect->left, rect->top);
1216
1217 /* During camera cropping its output window can change too, stop CEU */
1218 capsr = capture_save_reset(pcdev);
1219 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1220
1221 /*
1222 * 1. - 2. Apply iterative camera S_CROP for new input window, read back
1223 * actual camera rectangle.
1224 */
1225 ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
1226 &cam->rect, &cam->subrect);
1227 if (ret < 0)
1228 return ret;
1229
1230 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1231 cam_rect->width, cam_rect->height,
1232 cam_rect->left, cam_rect->top);
1233
1234 /* On success cam_crop contains current camera crop */
1235
1236 /* 3. Retrieve camera output window */
1237 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1238 if (ret < 0)
1239 return ret;
1240
1241 if (mf->width > pcdev->max_width || mf->height > pcdev->max_height)
1242 return -EINVAL;
1243
1244 /* 4. Calculate camera scales */
1245 scale_cam_h = calc_generic_scale(cam_rect->width, mf->width);
1246 scale_cam_v = calc_generic_scale(cam_rect->height, mf->height);
1247
1248 /* Calculate intermediate window */
1249 interm_width = scale_down(rect->width, scale_cam_h);
1250 interm_height = scale_down(rect->height, scale_cam_v);
1251
1252 if (interm_width < icd->user_width) {
1253 u32 new_scale_h;
1254
1255 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1256
1257 mf->width = scale_down(cam_rect->width, new_scale_h);
1258 }
1259
1260 if (interm_height < icd->user_height) {
1261 u32 new_scale_v;
1262
1263 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1264
1265 mf->height = scale_down(cam_rect->height, new_scale_v);
1266 }
1267
1268 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1269 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1270 soc_camera_grp_id(icd), pad,
1271 set_fmt, NULL, &fmt);
1272 if (ret < 0)
1273 return ret;
1274
1275 dev_geo(dev, "New camera output %ux%u\n", mf->width, mf->height);
1276 scale_cam_h = calc_generic_scale(cam_rect->width, mf->width);
1277 scale_cam_v = calc_generic_scale(cam_rect->height, mf->height);
1278 interm_width = scale_down(rect->width, scale_cam_h);
1279 interm_height = scale_down(rect->height, scale_cam_v);
1280 }
1281
1282 /* Cache camera output window */
1283 cam->width = mf->width;
1284 cam->height = mf->height;
1285
1286 if (pcdev->image_mode) {
1287 out_width = min(interm_width, icd->user_width);
1288 out_height = min(interm_height, icd->user_height);
1289 } else {
1290 out_width = interm_width;
1291 out_height = interm_height;
1292 }
1293
1294 /*
1295 * 5. Calculate CEU scales from camera scales from results of (5) and
1296 * the user window
1297 */
1298 scale_ceu_h = calc_scale(interm_width, &out_width);
1299 scale_ceu_v = calc_scale(interm_height, &out_height);
1300
1301 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1302
1303 /* Apply CEU scales. */
1304 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1305 if (cflcr != pcdev->cflcr) {
1306 pcdev->cflcr = cflcr;
1307 ceu_write(pcdev, CFLCR, cflcr);
1308 }
1309
1310 icd->user_width = out_width & ~3;
1311 icd->user_height = out_height & ~3;
1312 /* Offsets are applied at the CEU scaling filter input */
1313 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1314 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1315
1316 /* 6. Use CEU cropping to crop to the new window. */
1317 sh_mobile_ceu_set_rect(icd);
1318
1319 cam->subrect = *rect;
1320
1321 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1322 icd->user_width, icd->user_height,
1323 cam->ceu_left, cam->ceu_top);
1324
1325 /* Restore capture. The CE bit can be cleared by the hardware */
1326 if (pcdev->active)
1327 capsr |= 1;
1328 capture_restore(pcdev, capsr);
1329
1330 /* Even if only camera cropping succeeded */
1331 return ret;
1332 }
1333
1334 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1335 struct v4l2_crop *a)
1336 {
1337 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1338
1339 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1340 a->c = cam->subrect;
1341
1342 return 0;
1343 }
1344
1345 /* Similar to set_crop multistage iterative algorithm */
1346 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1347 struct v4l2_format *f)
1348 {
1349 struct device *dev = icd->parent;
1350 struct soc_camera_host *ici = to_soc_camera_host(dev);
1351 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1352 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1353 struct v4l2_pix_format *pix = &f->fmt.pix;
1354 struct v4l2_mbus_framefmt mf;
1355 __u32 pixfmt = pix->pixelformat;
1356 const struct soc_camera_format_xlate *xlate;
1357 unsigned int ceu_sub_width = pcdev->max_width,
1358 ceu_sub_height = pcdev->max_height;
1359 u16 scale_v, scale_h;
1360 int ret;
1361 bool image_mode;
1362 enum v4l2_field field;
1363
1364 switch (pix->field) {
1365 default:
1366 pix->field = V4L2_FIELD_NONE;
1367 /* fall-through */
1368 case V4L2_FIELD_INTERLACED_TB:
1369 case V4L2_FIELD_INTERLACED_BT:
1370 case V4L2_FIELD_NONE:
1371 field = pix->field;
1372 break;
1373 case V4L2_FIELD_INTERLACED:
1374 field = V4L2_FIELD_INTERLACED_TB;
1375 break;
1376 }
1377
1378 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1379 if (!xlate) {
1380 dev_warn(dev, "Format %x not found\n", pixfmt);
1381 return -EINVAL;
1382 }
1383
1384 /* 1.-4. Calculate desired client output geometry */
1385 soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12);
1386 mf.field = pix->field;
1387 mf.colorspace = pix->colorspace;
1388 mf.code = xlate->code;
1389
1390 switch (pixfmt) {
1391 case V4L2_PIX_FMT_NV12:
1392 case V4L2_PIX_FMT_NV21:
1393 case V4L2_PIX_FMT_NV16:
1394 case V4L2_PIX_FMT_NV61:
1395 image_mode = true;
1396 break;
1397 default:
1398 image_mode = false;
1399 }
1400
1401 dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1402 pix->width, pix->height);
1403
1404 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1405
1406 /* 5. - 9. */
1407 ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1408 &mf, &ceu_sub_width, &ceu_sub_height,
1409 image_mode && V4L2_FIELD_NONE == field, 12);
1410
1411 dev_geo(dev, "5-9: client scale return %d\n", ret);
1412
1413 /* Done with the camera. Now see if we can improve the result */
1414
1415 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1416 mf.width, mf.height, pix->width, pix->height);
1417 if (ret < 0)
1418 return ret;
1419
1420 if (mf.code != xlate->code)
1421 return -EINVAL;
1422
1423 /* 9. Prepare CEU crop */
1424 cam->width = mf.width;
1425 cam->height = mf.height;
1426
1427 /* 10. Use CEU scaling to scale to the requested user window. */
1428
1429 /* We cannot scale up */
1430 if (pix->width > ceu_sub_width)
1431 ceu_sub_width = pix->width;
1432
1433 if (pix->height > ceu_sub_height)
1434 ceu_sub_height = pix->height;
1435
1436 pix->colorspace = mf.colorspace;
1437
1438 if (image_mode) {
1439 /* Scale pix->{width x height} down to width x height */
1440 scale_h = calc_scale(ceu_sub_width, &pix->width);
1441 scale_v = calc_scale(ceu_sub_height, &pix->height);
1442 } else {
1443 pix->width = ceu_sub_width;
1444 pix->height = ceu_sub_height;
1445 scale_h = 0;
1446 scale_v = 0;
1447 }
1448
1449 pcdev->cflcr = scale_h | (scale_v << 16);
1450
1451 /*
1452 * We have calculated CFLCR, the actual configuration will be performed
1453 * in sh_mobile_ceu_set_bus_param()
1454 */
1455
1456 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1457 ceu_sub_width, scale_h, pix->width,
1458 ceu_sub_height, scale_v, pix->height);
1459
1460 cam->code = xlate->code;
1461 icd->current_fmt = xlate;
1462
1463 pcdev->field = field;
1464 pcdev->image_mode = image_mode;
1465
1466 /* CFSZR requirement */
1467 pix->width &= ~3;
1468 pix->height &= ~3;
1469
1470 return 0;
1471 }
1472
1473 #define CEU_CHDW_MAX 8188U /* Maximum line stride */
1474
1475 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1476 struct v4l2_format *f)
1477 {
1478 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1479 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1480 const struct soc_camera_format_xlate *xlate;
1481 struct v4l2_pix_format *pix = &f->fmt.pix;
1482 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1483 struct v4l2_subdev_pad_config pad_cfg;
1484 struct v4l2_subdev_format format = {
1485 .which = V4L2_SUBDEV_FORMAT_TRY,
1486 };
1487 struct v4l2_mbus_framefmt *mf = &format.format;
1488 __u32 pixfmt = pix->pixelformat;
1489 int width, height;
1490 int ret;
1491
1492 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1493 pixfmt, pix->width, pix->height);
1494
1495 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1496 if (!xlate) {
1497 xlate = icd->current_fmt;
1498 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1499 pixfmt, xlate->host_fmt->fourcc);
1500 pixfmt = xlate->host_fmt->fourcc;
1501 pix->pixelformat = pixfmt;
1502 pix->colorspace = icd->colorspace;
1503 }
1504
1505 /* FIXME: calculate using depth and bus width */
1506
1507 /* CFSZR requires height and width to be 4-pixel aligned */
1508 v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2,
1509 &pix->height, 4, pcdev->max_height, 2, 0);
1510
1511 width = pix->width;
1512 height = pix->height;
1513
1514 /* limit to sensor capabilities */
1515 mf->width = pix->width;
1516 mf->height = pix->height;
1517 mf->field = pix->field;
1518 mf->code = xlate->code;
1519 mf->colorspace = pix->colorspace;
1520
1521 ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1522 pad, set_fmt, &pad_cfg, &format);
1523 if (ret < 0)
1524 return ret;
1525
1526 pix->width = mf->width;
1527 pix->height = mf->height;
1528 pix->field = mf->field;
1529 pix->colorspace = mf->colorspace;
1530
1531 switch (pixfmt) {
1532 case V4L2_PIX_FMT_NV12:
1533 case V4L2_PIX_FMT_NV21:
1534 case V4L2_PIX_FMT_NV16:
1535 case V4L2_PIX_FMT_NV61:
1536 /* FIXME: check against rect_max after converting soc-camera */
1537 /* We can scale precisely, need a bigger image from camera */
1538 if (pix->width < width || pix->height < height) {
1539 /*
1540 * We presume, the sensor behaves sanely, i.e., if
1541 * requested a bigger rectangle, it will not return a
1542 * smaller one.
1543 */
1544 mf->width = pcdev->max_width;
1545 mf->height = pcdev->max_height;
1546 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1547 soc_camera_grp_id(icd), pad,
1548 set_fmt, &pad_cfg, &format);
1549 if (ret < 0) {
1550 /* Shouldn't actually happen... */
1551 dev_err(icd->parent,
1552 "FIXME: client try_fmt() = %d\n", ret);
1553 return ret;
1554 }
1555 }
1556 /* We will scale exactly */
1557 if (mf->width > width)
1558 pix->width = width;
1559 if (mf->height > height)
1560 pix->height = height;
1561
1562 pix->bytesperline = max(pix->bytesperline, pix->width);
1563 pix->bytesperline = min(pix->bytesperline, CEU_CHDW_MAX);
1564 pix->bytesperline &= ~3;
1565 break;
1566
1567 default:
1568 /* Configurable stride isn't supported in pass-through mode. */
1569 pix->bytesperline = 0;
1570 }
1571
1572 pix->width &= ~3;
1573 pix->height &= ~3;
1574 pix->sizeimage = 0;
1575
1576 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1577 __func__, ret, pix->pixelformat, pix->width, pix->height);
1578
1579 return ret;
1580 }
1581
1582 static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1583 const struct v4l2_crop *a)
1584 {
1585 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1586 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1587 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1588 u32 out_width = icd->user_width, out_height = icd->user_height;
1589 int ret;
1590
1591 /* Freeze queue */
1592 pcdev->frozen = 1;
1593 /* Wait for frame */
1594 ret = wait_for_completion_interruptible(&pcdev->complete);
1595 /* Stop the client */
1596 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1597 if (ret < 0)
1598 dev_warn(icd->parent,
1599 "Client failed to stop the stream: %d\n", ret);
1600 else
1601 /* Do the crop, if it fails, there's nothing more we can do */
1602 sh_mobile_ceu_set_crop(icd, a);
1603
1604 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1605
1606 if (icd->user_width != out_width || icd->user_height != out_height) {
1607 struct v4l2_format f = {
1608 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1609 .fmt.pix = {
1610 .width = out_width,
1611 .height = out_height,
1612 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1613 .field = pcdev->field,
1614 .colorspace = icd->colorspace,
1615 },
1616 };
1617 ret = sh_mobile_ceu_set_fmt(icd, &f);
1618 if (!ret && (out_width != f.fmt.pix.width ||
1619 out_height != f.fmt.pix.height))
1620 ret = -EINVAL;
1621 if (!ret) {
1622 icd->user_width = out_width & ~3;
1623 icd->user_height = out_height & ~3;
1624 ret = sh_mobile_ceu_set_bus_param(icd);
1625 }
1626 }
1627
1628 /* Thaw the queue */
1629 pcdev->frozen = 0;
1630 spin_lock_irq(&pcdev->lock);
1631 sh_mobile_ceu_capture(pcdev);
1632 spin_unlock_irq(&pcdev->lock);
1633 /* Start the client */
1634 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1635 return ret;
1636 }
1637
1638 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1639 {
1640 struct soc_camera_device *icd = file->private_data;
1641
1642 return vb2_poll(&icd->vb2_vidq, file, pt);
1643 }
1644
1645 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1646 struct v4l2_capability *cap)
1647 {
1648 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1649 strlcpy(cap->driver, "sh_mobile_ceu", sizeof(cap->driver));
1650 strlcpy(cap->bus_info, "platform:sh_mobile_ceu", sizeof(cap->bus_info));
1651 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1652 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1653
1654 return 0;
1655 }
1656
1657 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1658 struct soc_camera_device *icd)
1659 {
1660 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1661
1662 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1663 q->io_modes = VB2_MMAP | VB2_USERPTR;
1664 q->drv_priv = icd;
1665 q->ops = &sh_mobile_ceu_videobuf_ops;
1666 q->mem_ops = &vb2_dma_contig_memops;
1667 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1668 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1669 q->lock = &ici->host_lock;
1670 q->dev = ici->v4l2_dev.dev;
1671
1672 return vb2_queue_init(q);
1673 }
1674
1675 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1676 .owner = THIS_MODULE,
1677 .add = sh_mobile_ceu_add_device,
1678 .remove = sh_mobile_ceu_remove_device,
1679 .clock_start = sh_mobile_ceu_clock_start,
1680 .clock_stop = sh_mobile_ceu_clock_stop,
1681 .get_formats = sh_mobile_ceu_get_formats,
1682 .put_formats = sh_mobile_ceu_put_formats,
1683 .get_crop = sh_mobile_ceu_get_crop,
1684 .set_crop = sh_mobile_ceu_set_crop,
1685 .set_livecrop = sh_mobile_ceu_set_livecrop,
1686 .set_fmt = sh_mobile_ceu_set_fmt,
1687 .try_fmt = sh_mobile_ceu_try_fmt,
1688 .poll = sh_mobile_ceu_poll,
1689 .querycap = sh_mobile_ceu_querycap,
1690 .set_bus_param = sh_mobile_ceu_set_bus_param,
1691 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1692 };
1693
1694 struct bus_wait {
1695 struct notifier_block notifier;
1696 struct completion completion;
1697 struct device *dev;
1698 };
1699
1700 static int bus_notify(struct notifier_block *nb,
1701 unsigned long action, void *data)
1702 {
1703 struct device *dev = data;
1704 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1705
1706 if (wait->dev != dev)
1707 return NOTIFY_DONE;
1708
1709 switch (action) {
1710 case BUS_NOTIFY_UNBOUND_DRIVER:
1711 /* Protect from module unloading */
1712 wait_for_completion(&wait->completion);
1713 return NOTIFY_OK;
1714 }
1715 return NOTIFY_DONE;
1716 }
1717
1718 static int sh_mobile_ceu_probe(struct platform_device *pdev)
1719 {
1720 struct sh_mobile_ceu_dev *pcdev;
1721 struct resource *res;
1722 void __iomem *base;
1723 unsigned int irq;
1724 int err, i;
1725 struct bus_wait wait = {
1726 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
1727 .notifier.notifier_call = bus_notify,
1728 };
1729 struct sh_mobile_ceu_companion *csi2;
1730
1731 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1732 irq = platform_get_irq(pdev, 0);
1733 if (!res || (int)irq <= 0) {
1734 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1735 return -ENODEV;
1736 }
1737
1738 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1739 if (!pcdev) {
1740 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1741 return -ENOMEM;
1742 }
1743
1744 INIT_LIST_HEAD(&pcdev->capture);
1745 spin_lock_init(&pcdev->lock);
1746 init_completion(&pcdev->complete);
1747
1748 pcdev->pdata = pdev->dev.platform_data;
1749 if (!pcdev->pdata && !pdev->dev.of_node) {
1750 dev_err(&pdev->dev, "CEU platform data not set.\n");
1751 return -EINVAL;
1752 }
1753
1754 /* TODO: implement per-device bus flags */
1755 if (pcdev->pdata) {
1756 pcdev->max_width = pcdev->pdata->max_width;
1757 pcdev->max_height = pcdev->pdata->max_height;
1758 pcdev->flags = pcdev->pdata->flags;
1759 }
1760 pcdev->field = V4L2_FIELD_NONE;
1761
1762 if (!pcdev->max_width) {
1763 unsigned int v;
1764 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-width", &v);
1765 if (!err)
1766 pcdev->max_width = v;
1767
1768 if (!pcdev->max_width)
1769 pcdev->max_width = 2560;
1770 }
1771 if (!pcdev->max_height) {
1772 unsigned int v;
1773 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-height", &v);
1774 if (!err)
1775 pcdev->max_height = v;
1776
1777 if (!pcdev->max_height)
1778 pcdev->max_height = 1920;
1779 }
1780
1781 base = devm_ioremap_resource(&pdev->dev, res);
1782 if (IS_ERR(base))
1783 return PTR_ERR(base);
1784
1785 pcdev->irq = irq;
1786 pcdev->base = base;
1787 pcdev->video_limit = 0; /* only enabled if second resource exists */
1788
1789 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1790 if (res) {
1791 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1792 res->start,
1793 resource_size(res),
1794 DMA_MEMORY_MAP |
1795 DMA_MEMORY_EXCLUSIVE);
1796 if (!err) {
1797 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1798 return -ENXIO;
1799 }
1800
1801 pcdev->video_limit = resource_size(res);
1802 }
1803
1804 /* request irq */
1805 err = devm_request_irq(&pdev->dev, pcdev->irq, sh_mobile_ceu_irq,
1806 0, dev_name(&pdev->dev), pcdev);
1807 if (err) {
1808 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1809 goto exit_release_mem;
1810 }
1811
1812 pm_suspend_ignore_children(&pdev->dev, true);
1813 pm_runtime_enable(&pdev->dev);
1814 pm_runtime_resume(&pdev->dev);
1815
1816 pcdev->ici.priv = pcdev;
1817 pcdev->ici.v4l2_dev.dev = &pdev->dev;
1818 pcdev->ici.nr = pdev->id;
1819 pcdev->ici.drv_name = dev_name(&pdev->dev);
1820 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1821 pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE;
1822
1823 if (pcdev->pdata && pcdev->pdata->asd_sizes) {
1824 struct v4l2_async_subdev **asd;
1825 char name[] = "sh-mobile-csi2";
1826 int j;
1827
1828 /*
1829 * CSI2 interfacing: several groups can use CSI2, pick up the
1830 * first one
1831 */
1832 asd = pcdev->pdata->asd;
1833 for (j = 0; pcdev->pdata->asd_sizes[j]; j++) {
1834 for (i = 0; i < pcdev->pdata->asd_sizes[j]; i++, asd++) {
1835 dev_dbg(&pdev->dev, "%s(): subdev #%d, type %u\n",
1836 __func__, i, (*asd)->match_type);
1837 if ((*asd)->match_type == V4L2_ASYNC_MATCH_DEVNAME &&
1838 !strncmp(name, (*asd)->match.device_name.name,
1839 sizeof(name) - 1)) {
1840 pcdev->csi2_asd = *asd;
1841 break;
1842 }
1843 }
1844 if (pcdev->csi2_asd)
1845 break;
1846 }
1847
1848 pcdev->ici.asd = pcdev->pdata->asd;
1849 pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
1850 }
1851
1852 /* Legacy CSI2 interfacing */
1853 csi2 = pcdev->pdata ? pcdev->pdata->csi2 : NULL;
1854 if (csi2) {
1855 /*
1856 * TODO: remove this once all users are converted to
1857 * asynchronous CSI2 probing. If it has to be kept, csi2
1858 * platform device resources have to be added, using
1859 * platform_device_add_resources()
1860 */
1861 struct platform_device *csi2_pdev =
1862 platform_device_alloc("sh-mobile-csi2", csi2->id);
1863 struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
1864
1865 if (!csi2_pdev) {
1866 err = -ENOMEM;
1867 goto exit_free_clk;
1868 }
1869
1870 pcdev->csi2_pdev = csi2_pdev;
1871
1872 err = platform_device_add_data(csi2_pdev, csi2_pdata,
1873 sizeof(*csi2_pdata));
1874 if (err < 0)
1875 goto exit_pdev_put;
1876
1877 csi2_pdev->resource = csi2->resource;
1878 csi2_pdev->num_resources = csi2->num_resources;
1879
1880 err = platform_device_add(csi2_pdev);
1881 if (err < 0)
1882 goto exit_pdev_put;
1883
1884 wait.dev = &csi2_pdev->dev;
1885
1886 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
1887 if (err < 0)
1888 goto exit_pdev_unregister;
1889
1890 /*
1891 * From this point the driver module will not unload, until
1892 * we complete the completion.
1893 */
1894
1895 if (!csi2_pdev->dev.driver) {
1896 complete(&wait.completion);
1897 /* Either too late, or probing failed */
1898 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
1899 err = -ENXIO;
1900 goto exit_pdev_unregister;
1901 }
1902
1903 /*
1904 * The module is still loaded, in the worst case it is hanging
1905 * in device release on our completion. So, _now_ dereferencing
1906 * the "owner" is safe!
1907 */
1908
1909 err = try_module_get(csi2_pdev->dev.driver->owner);
1910
1911 /* Let notifier complete, if it has been locked */
1912 complete(&wait.completion);
1913 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
1914 if (!err) {
1915 err = -ENODEV;
1916 goto exit_pdev_unregister;
1917 }
1918
1919 pcdev->csi2_sd = platform_get_drvdata(csi2_pdev);
1920 }
1921
1922 err = soc_camera_host_register(&pcdev->ici);
1923 if (err)
1924 goto exit_csi2_unregister;
1925
1926 if (csi2) {
1927 err = v4l2_device_register_subdev(&pcdev->ici.v4l2_dev,
1928 pcdev->csi2_sd);
1929 dev_dbg(&pdev->dev, "%s(): ret(register_subdev) = %d\n",
1930 __func__, err);
1931 if (err < 0)
1932 goto exit_host_unregister;
1933 /* v4l2_device_register_subdev() took a reference too */
1934 module_put(pcdev->csi2_sd->owner);
1935 }
1936
1937 return 0;
1938
1939 exit_host_unregister:
1940 soc_camera_host_unregister(&pcdev->ici);
1941 exit_csi2_unregister:
1942 if (csi2) {
1943 module_put(pcdev->csi2_pdev->dev.driver->owner);
1944 exit_pdev_unregister:
1945 platform_device_del(pcdev->csi2_pdev);
1946 exit_pdev_put:
1947 pcdev->csi2_pdev->resource = NULL;
1948 platform_device_put(pcdev->csi2_pdev);
1949 }
1950 exit_free_clk:
1951 pm_runtime_disable(&pdev->dev);
1952 exit_release_mem:
1953 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1954 dma_release_declared_memory(&pdev->dev);
1955 return err;
1956 }
1957
1958 static int sh_mobile_ceu_remove(struct platform_device *pdev)
1959 {
1960 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1961 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
1962 struct sh_mobile_ceu_dev, ici);
1963 struct platform_device *csi2_pdev = pcdev->csi2_pdev;
1964
1965 soc_camera_host_unregister(soc_host);
1966 pm_runtime_disable(&pdev->dev);
1967 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1968 dma_release_declared_memory(&pdev->dev);
1969 if (csi2_pdev && csi2_pdev->dev.driver) {
1970 struct module *csi2_drv = csi2_pdev->dev.driver->owner;
1971 platform_device_del(csi2_pdev);
1972 csi2_pdev->resource = NULL;
1973 platform_device_put(csi2_pdev);
1974 module_put(csi2_drv);
1975 }
1976
1977 return 0;
1978 }
1979
1980 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1981 {
1982 /* Runtime PM callback shared between ->runtime_suspend()
1983 * and ->runtime_resume(). Simply returns success.
1984 *
1985 * This driver re-initializes all registers after
1986 * pm_runtime_get_sync() anyway so there is no need
1987 * to save and restore registers here.
1988 */
1989 return 0;
1990 }
1991
1992 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1993 .runtime_suspend = sh_mobile_ceu_runtime_nop,
1994 .runtime_resume = sh_mobile_ceu_runtime_nop,
1995 };
1996
1997 static const struct of_device_id sh_mobile_ceu_of_match[] = {
1998 { .compatible = "renesas,sh-mobile-ceu" },
1999 { }
2000 };
2001 MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
2002
2003 static struct platform_driver sh_mobile_ceu_driver = {
2004 .driver = {
2005 .name = "sh_mobile_ceu",
2006 .pm = &sh_mobile_ceu_dev_pm_ops,
2007 .of_match_table = sh_mobile_ceu_of_match,
2008 },
2009 .probe = sh_mobile_ceu_probe,
2010 .remove = sh_mobile_ceu_remove,
2011 };
2012
2013 static int __init sh_mobile_ceu_init(void)
2014 {
2015 /* Whatever return code */
2016 request_module("sh_mobile_csi2");
2017 return platform_driver_register(&sh_mobile_ceu_driver);
2018 }
2019
2020 static void __exit sh_mobile_ceu_exit(void)
2021 {
2022 platform_driver_unregister(&sh_mobile_ceu_driver);
2023 }
2024
2025 module_init(sh_mobile_ceu_init);
2026 module_exit(sh_mobile_ceu_exit);
2027
2028 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2029 MODULE_AUTHOR("Magnus Damm");
2030 MODULE_LICENSE("GPL");
2031 MODULE_VERSION("0.1.0");
2032 MODULE_ALIAS("platform:sh_mobile_ceu");
Linux kernel - Deliverables
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