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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / media / video / sh_mobile_ceu_camera.c
blob3fe54bf41142d025437859ea71dbd0765bc67d0c
1 /*
2 * V4L2 Driver for SuperH Mobile CEU interface
3 *
4 * Copyright (C) 2008 Magnus Damm
5 *
6 * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
7 *
8 * Copyright (C) 2006, Sascha Hauer, Pengutronix
9 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 */
16
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/io.h>
20 #include <linux/delay.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/errno.h>
23 #include <linux/fs.h>
24 #include <linux/interrupt.h>
25 #include <linux/kernel.h>
26 #include <linux/mm.h>
27 #include <linux/moduleparam.h>
28 #include <linux/time.h>
29 #include <linux/version.h>
30 #include <linux/slab.h>
31 #include <linux/device.h>
32 #include <linux/platform_device.h>
33 #include <linux/videodev2.h>
34 #include <linux/pm_runtime.h>
35 #include <linux/sched.h>
36
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-dev.h>
39 #include <media/soc_camera.h>
40 #include <media/sh_mobile_ceu.h>
41 #include <media/videobuf2-dma-contig.h>
42 #include <media/v4l2-mediabus.h>
43 #include <media/soc_mediabus.h>
44
45 /* register offsets for sh7722 / sh7723 */
46
47 #define CAPSR 0x00 /* Capture start register */
48 #define CAPCR 0x04 /* Capture control register */
49 #define CAMCR 0x08 /* Capture interface control register */
50 #define CMCYR 0x0c /* Capture interface cycle register */
51 #define CAMOR 0x10 /* Capture interface offset register */
52 #define CAPWR 0x14 /* Capture interface width register */
53 #define CAIFR 0x18 /* Capture interface input format register */
54 #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
55 #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
56 #define CRCNTR 0x28 /* CEU register control register */
57 #define CRCMPR 0x2c /* CEU register forcible control register */
58 #define CFLCR 0x30 /* Capture filter control register */
59 #define CFSZR 0x34 /* Capture filter size clip register */
60 #define CDWDR 0x38 /* Capture destination width register */
61 #define CDAYR 0x3c /* Capture data address Y register */
62 #define CDACR 0x40 /* Capture data address C register */
63 #define CDBYR 0x44 /* Capture data bottom-field address Y register */
64 #define CDBCR 0x48 /* Capture data bottom-field address C register */
65 #define CBDSR 0x4c /* Capture bundle destination size register */
66 #define CFWCR 0x5c /* Firewall operation control register */
67 #define CLFCR 0x60 /* Capture low-pass filter control register */
68 #define CDOCR 0x64 /* Capture data output control register */
69 #define CDDCR 0x68 /* Capture data complexity level register */
70 #define CDDAR 0x6c /* Capture data complexity level address register */
71 #define CEIER 0x70 /* Capture event interrupt enable register */
72 #define CETCR 0x74 /* Capture event flag clear register */
73 #define CSTSR 0x7c /* Capture status register */
74 #define CSRTR 0x80 /* Capture software reset register */
75 #define CDSSR 0x84 /* Capture data size register */
76 #define CDAYR2 0x90 /* Capture data address Y register 2 */
77 #define CDACR2 0x94 /* Capture data address C register 2 */
78 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
79 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
80
81 #undef DEBUG_GEOMETRY
82 #ifdef DEBUG_GEOMETRY
83 #define dev_geo dev_info
84 #else
85 #define dev_geo dev_dbg
86 #endif
87
88 /* per video frame buffer */
89 struct sh_mobile_ceu_buffer {
90 struct vb2_buffer vb; /* v4l buffer must be first */
91 struct list_head queue;
92 enum v4l2_mbus_pixelcode code;
93 };
94
95 struct sh_mobile_ceu_dev {
96 struct soc_camera_host ici;
97 struct soc_camera_device *icd;
98
99 unsigned int irq;
100 void __iomem *base;
101 unsigned long video_limit;
102
103 spinlock_t lock; /* Protects video buffer lists */
104 struct list_head capture;
105 struct vb2_buffer *active;
106 struct vb2_alloc_ctx *alloc_ctx;
107
108 struct sh_mobile_ceu_info *pdata;
109
110 u32 cflcr;
111
112 enum v4l2_field field;
113 int sequence;
114
115 unsigned int image_mode:1;
116 unsigned int is_16bit:1;
117 };
118
119 struct sh_mobile_ceu_cam {
120 /* CEU offsets within scaled by the CEU camera output */
121 unsigned int ceu_left;
122 unsigned int ceu_top;
123 /* Client output, as seen by the CEU */
124 unsigned int width;
125 unsigned int height;
126 /*
127 * User window from S_CROP / G_CROP, produced by client cropping and
128 * scaling, CEU scaling and CEU cropping, mapped back onto the client
129 * input window
130 */
131 struct v4l2_rect subrect;
132 /* Camera cropping rectangle */
133 struct v4l2_rect rect;
134 const struct soc_mbus_pixelfmt *extra_fmt;
135 enum v4l2_mbus_pixelcode code;
136 };
137
138 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_buffer *vb)
139 {
140 return container_of(vb, struct sh_mobile_ceu_buffer, vb);
141 }
142
143 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
144 {
145 unsigned long flags;
146
147 flags = SOCAM_MASTER |
148 SOCAM_PCLK_SAMPLE_RISING |
149 SOCAM_HSYNC_ACTIVE_HIGH |
150 SOCAM_HSYNC_ACTIVE_LOW |
151 SOCAM_VSYNC_ACTIVE_HIGH |
152 SOCAM_VSYNC_ACTIVE_LOW |
153 SOCAM_DATA_ACTIVE_HIGH;
154
155 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
156 flags |= SOCAM_DATAWIDTH_8;
157
158 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
159 flags |= SOCAM_DATAWIDTH_16;
160
161 if (flags & SOCAM_DATAWIDTH_MASK)
162 return flags;
163
164 return 0;
165 }
166
167 static void ceu_write(struct sh_mobile_ceu_dev *priv,
168 unsigned long reg_offs, u32 data)
169 {
170 iowrite32(data, priv->base + reg_offs);
171 }
172
173 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
174 {
175 return ioread32(priv->base + reg_offs);
176 }
177
178 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
179 {
180 int i, success = 0;
181 struct soc_camera_device *icd = pcdev->icd;
182
183 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
184
185 /* wait CSTSR.CPTON bit */
186 for (i = 0; i < 1000; i++) {
187 if (!(ceu_read(pcdev, CSTSR) & 1)) {
188 success++;
189 break;
190 }
191 udelay(1);
192 }
193
194 /* wait CAPSR.CPKIL bit */
195 for (i = 0; i < 1000; i++) {
196 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
197 success++;
198 break;
199 }
200 udelay(1);
201 }
202
203
204 if (2 != success) {
205 dev_warn(&icd->dev, "soft reset time out\n");
206 return -EIO;
207 }
208
209 return 0;
210 }
211
212 /*
213 * Videobuf operations
214 */
215 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
216 unsigned int *count, unsigned int *num_planes,
217 unsigned long sizes[], void *alloc_ctxs[])
218 {
219 struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
220 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
221 struct sh_mobile_ceu_dev *pcdev = ici->priv;
222 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
223 icd->current_fmt->host_fmt);
224
225 if (bytes_per_line < 0)
226 return bytes_per_line;
227
228 *num_planes = 1;
229
230 pcdev->sequence = 0;
231 sizes[0] = bytes_per_line * icd->user_height;
232 alloc_ctxs[0] = pcdev->alloc_ctx;
233
234 if (!*count)
235 *count = 2;
236
237 if (pcdev->video_limit) {
238 if (PAGE_ALIGN(sizes[0]) * *count > pcdev->video_limit)
239 *count = pcdev->video_limit / PAGE_ALIGN(sizes[0]);
240 }
241
242 dev_dbg(icd->dev.parent, "count=%d, size=%lu\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->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 int ret = 0;
267
268 /*
269 * The hardware is _very_ picky about this sequence. Especially
270 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
271 * several not-so-well documented interrupt sources in CETCR.
272 */
273 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
274 status = ceu_read(pcdev, CETCR);
275 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
276 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
277 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
278 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
279
280 /*
281 * When a VBP interrupt occurs, a capture end interrupt does not occur
282 * and the image of that frame is not captured correctly. So, soft reset
283 * is needed here.
284 */
285 if (status & CEU_CEIER_VBP) {
286 sh_mobile_ceu_soft_reset(pcdev);
287 ret = -EIO;
288 }
289
290 if (!pcdev->active)
291 return ret;
292
293 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
294 top1 = CDBYR;
295 top2 = CDBCR;
296 bottom1 = CDAYR;
297 bottom2 = CDACR;
298 } else {
299 top1 = CDAYR;
300 top2 = CDACR;
301 bottom1 = CDBYR;
302 bottom2 = CDBCR;
303 }
304
305 phys_addr_top = vb2_dma_contig_plane_paddr(pcdev->active, 0);
306
307 ceu_write(pcdev, top1, phys_addr_top);
308 if (V4L2_FIELD_NONE != pcdev->field) {
309 phys_addr_bottom = phys_addr_top + icd->user_width;
310 ceu_write(pcdev, bottom1, phys_addr_bottom);
311 }
312
313 switch (icd->current_fmt->host_fmt->fourcc) {
314 case V4L2_PIX_FMT_NV12:
315 case V4L2_PIX_FMT_NV21:
316 case V4L2_PIX_FMT_NV16:
317 case V4L2_PIX_FMT_NV61:
318 phys_addr_top += icd->user_width *
319 icd->user_height;
320 ceu_write(pcdev, top2, phys_addr_top);
321 if (V4L2_FIELD_NONE != pcdev->field) {
322 phys_addr_bottom = phys_addr_top + icd->user_width;
323 ceu_write(pcdev, bottom2, phys_addr_bottom);
324 }
325 }
326
327 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
328
329 return ret;
330 }
331
332 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
333 {
334 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
335 struct sh_mobile_ceu_buffer *buf;
336 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
337 icd->current_fmt->host_fmt);
338 unsigned long size;
339
340 if (bytes_per_line < 0)
341 return bytes_per_line;
342
343 buf = to_ceu_vb(vb);
344
345 dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
346 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
347
348 /* Added list head initialization on alloc */
349 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
350
351 #ifdef DEBUG
352 /*
353 * This can be useful if you want to see if we actually fill
354 * the buffer with something
355 */
356 if (vb2_plane_vaddr(vb, 0))
357 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
358 #endif
359
360 BUG_ON(NULL == icd->current_fmt);
361
362 size = icd->user_height * bytes_per_line;
363
364 if (vb2_plane_size(vb, 0) < size) {
365 dev_err(icd->dev.parent, "Buffer too small (%lu < %lu)\n",
366 vb2_plane_size(vb, 0), size);
367 return -ENOBUFS;
368 }
369
370 vb2_set_plane_payload(vb, 0, size);
371
372 return 0;
373 }
374
375 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
376 {
377 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
378 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
379 struct sh_mobile_ceu_dev *pcdev = ici->priv;
380 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
381 unsigned long flags;
382
383 dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
384 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
385
386 spin_lock_irqsave(&pcdev->lock, flags);
387 list_add_tail(&buf->queue, &pcdev->capture);
388
389 if (!pcdev->active) {
390 /*
391 * Because there were no active buffer at this moment,
392 * we are not interested in the return value of
393 * sh_mobile_ceu_capture here.
394 */
395 pcdev->active = vb;
396 sh_mobile_ceu_capture(pcdev);
397 }
398 spin_unlock_irqrestore(&pcdev->lock, flags);
399 }
400
401 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
402 {
403 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
404 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
405 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
406 struct sh_mobile_ceu_dev *pcdev = ici->priv;
407 unsigned long flags;
408
409 spin_lock_irqsave(&pcdev->lock, flags);
410
411 if (pcdev->active == vb) {
412 /* disable capture (release DMA buffer), reset */
413 ceu_write(pcdev, CAPSR, 1 << 16);
414 pcdev->active = NULL;
415 }
416
417 /* Doesn't hurt also if the list is empty */
418 list_del_init(&buf->queue);
419
420 spin_unlock_irqrestore(&pcdev->lock, flags);
421 }
422
423 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
424 {
425 /* This is for locking debugging only */
426 INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
427 return 0;
428 }
429
430 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
431 .queue_setup = sh_mobile_ceu_videobuf_setup,
432 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
433 .buf_queue = sh_mobile_ceu_videobuf_queue,
434 .buf_cleanup = sh_mobile_ceu_videobuf_release,
435 .buf_init = sh_mobile_ceu_videobuf_init,
436 .wait_prepare = soc_camera_unlock,
437 .wait_finish = soc_camera_lock,
438 };
439
440 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
441 {
442 struct sh_mobile_ceu_dev *pcdev = data;
443 struct vb2_buffer *vb;
444 int ret;
445
446 spin_lock(&pcdev->lock);
447
448 vb = pcdev->active;
449 if (!vb)
450 /* Stale interrupt from a released buffer */
451 goto out;
452
453 list_del_init(&to_ceu_vb(vb)->queue);
454
455 if (!list_empty(&pcdev->capture))
456 pcdev->active = &list_entry(pcdev->capture.next,
457 struct sh_mobile_ceu_buffer, queue)->vb;
458 else
459 pcdev->active = NULL;
460
461 ret = sh_mobile_ceu_capture(pcdev);
462 do_gettimeofday(&vb->v4l2_buf.timestamp);
463 if (!ret) {
464 vb->v4l2_buf.field = pcdev->field;
465 vb->v4l2_buf.sequence = pcdev->sequence++;
466 }
467 vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
468
469 out:
470 spin_unlock(&pcdev->lock);
471
472 return IRQ_HANDLED;
473 }
474
475 /* Called with .video_lock held */
476 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
477 {
478 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
479 struct sh_mobile_ceu_dev *pcdev = ici->priv;
480 int ret;
481
482 if (pcdev->icd)
483 return -EBUSY;
484
485 dev_info(icd->dev.parent,
486 "SuperH Mobile CEU driver attached to camera %d\n",
487 icd->devnum);
488
489 pm_runtime_get_sync(ici->v4l2_dev.dev);
490
491 ret = sh_mobile_ceu_soft_reset(pcdev);
492 if (!ret)
493 pcdev->icd = icd;
494
495 return ret;
496 }
497
498 /* Called with .video_lock held */
499 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
500 {
501 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
502 struct sh_mobile_ceu_dev *pcdev = ici->priv;
503 unsigned long flags;
504
505 BUG_ON(icd != pcdev->icd);
506
507 /* disable capture, disable interrupts */
508 ceu_write(pcdev, CEIER, 0);
509 sh_mobile_ceu_soft_reset(pcdev);
510
511 /* make sure active buffer is canceled */
512 spin_lock_irqsave(&pcdev->lock, flags);
513 if (pcdev->active) {
514 list_del_init(&to_ceu_vb(pcdev->active)->queue);
515 vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
516 pcdev->active = NULL;
517 }
518 spin_unlock_irqrestore(&pcdev->lock, flags);
519
520 pm_runtime_put_sync(ici->v4l2_dev.dev);
521
522 dev_info(icd->dev.parent,
523 "SuperH Mobile CEU driver detached from camera %d\n",
524 icd->devnum);
525
526 pcdev->icd = NULL;
527 }
528
529 /*
530 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
531 * in SH7722 Hardware Manual
532 */
533 static unsigned int size_dst(unsigned int src, unsigned int scale)
534 {
535 unsigned int mant_pre = scale >> 12;
536 if (!src || !scale)
537 return src;
538 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
539 mant_pre * 4096 / scale + 1;
540 }
541
542 static u16 calc_scale(unsigned int src, unsigned int *dst)
543 {
544 u16 scale;
545
546 if (src == *dst)
547 return 0;
548
549 scale = (src * 4096 / *dst) & ~7;
550
551 while (scale > 4096 && size_dst(src, scale) < *dst)
552 scale -= 8;
553
554 *dst = size_dst(src, scale);
555
556 return scale;
557 }
558
559 /* rect is guaranteed to not exceed the scaled camera rectangle */
560 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
561 {
562 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
563 struct sh_mobile_ceu_cam *cam = icd->host_priv;
564 struct sh_mobile_ceu_dev *pcdev = ici->priv;
565 unsigned int height, width, cdwdr_width, in_width, in_height;
566 unsigned int left_offset, top_offset;
567 u32 camor;
568
569 dev_geo(icd->dev.parent, "Crop %ux%u@%u:%u\n",
570 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
571
572 left_offset = cam->ceu_left;
573 top_offset = cam->ceu_top;
574
575 /* CEU cropping (CFSZR) is applied _after_ the scaling filter (CFLCR) */
576 if (pcdev->image_mode) {
577 in_width = cam->width;
578 if (!pcdev->is_16bit) {
579 in_width *= 2;
580 left_offset *= 2;
581 }
582 width = icd->user_width;
583 cdwdr_width = icd->user_width;
584 } else {
585 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
586 icd->current_fmt->host_fmt);
587 unsigned int w_factor;
588
589 width = icd->user_width;
590
591 switch (icd->current_fmt->host_fmt->packing) {
592 case SOC_MBUS_PACKING_2X8_PADHI:
593 w_factor = 2;
594 break;
595 default:
596 w_factor = 1;
597 }
598
599 in_width = cam->width * w_factor;
600 left_offset = left_offset * w_factor;
601
602 if (bytes_per_line < 0)
603 cdwdr_width = icd->user_width;
604 else
605 cdwdr_width = bytes_per_line;
606 }
607
608 height = icd->user_height;
609 in_height = cam->height;
610 if (V4L2_FIELD_NONE != pcdev->field) {
611 height /= 2;
612 in_height /= 2;
613 top_offset /= 2;
614 cdwdr_width *= 2;
615 }
616
617 /* CSI2 special configuration */
618 if (pcdev->pdata->csi2_dev) {
619 in_width = ((in_width - 2) * 2);
620 left_offset *= 2;
621 }
622
623 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
624 camor = left_offset | (top_offset << 16);
625
626 dev_geo(icd->dev.parent,
627 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
628 (in_height << 16) | in_width, (height << 16) | width,
629 cdwdr_width);
630
631 ceu_write(pcdev, CAMOR, camor);
632 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
633 ceu_write(pcdev, CFSZR, (height << 16) | width);
634 ceu_write(pcdev, CDWDR, cdwdr_width);
635 }
636
637 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
638 {
639 u32 capsr = ceu_read(pcdev, CAPSR);
640 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
641 return capsr;
642 }
643
644 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
645 {
646 unsigned long timeout = jiffies + 10 * HZ;
647
648 /*
649 * Wait until the end of the current frame. It can take a long time,
650 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
651 */
652 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
653 msleep(1);
654
655 if (time_after(jiffies, timeout)) {
656 dev_err(pcdev->ici.v4l2_dev.dev,
657 "Timeout waiting for frame end! Interface problem?\n");
658 return;
659 }
660
661 /* Wait until reset clears, this shall not hang... */
662 while (ceu_read(pcdev, CAPSR) & (1 << 16))
663 udelay(10);
664
665 /* Anything to restore? */
666 if (capsr & ~(1 << 16))
667 ceu_write(pcdev, CAPSR, capsr);
668 }
669
670 /* Capture is not running, no interrupts, no locking needed */
671 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
672 __u32 pixfmt)
673 {
674 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
675 struct sh_mobile_ceu_dev *pcdev = ici->priv;
676 int ret;
677 unsigned long camera_flags, common_flags, value;
678 int yuv_lineskip;
679 struct sh_mobile_ceu_cam *cam = icd->host_priv;
680 u32 capsr = capture_save_reset(pcdev);
681
682 camera_flags = icd->ops->query_bus_param(icd);
683 common_flags = soc_camera_bus_param_compatible(camera_flags,
684 make_bus_param(pcdev));
685 if (!common_flags)
686 return -EINVAL;
687
688 /* Make choises, based on platform preferences */
689 if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
690 (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
691 if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
692 common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
693 else
694 common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
695 }
696
697 if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
698 (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
699 if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
700 common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
701 else
702 common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
703 }
704
705 ret = icd->ops->set_bus_param(icd, common_flags);
706 if (ret < 0)
707 return ret;
708
709 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
710 case SOCAM_DATAWIDTH_8:
711 pcdev->is_16bit = 0;
712 break;
713 case SOCAM_DATAWIDTH_16:
714 pcdev->is_16bit = 1;
715 break;
716 default:
717 return -EINVAL;
718 }
719
720 ceu_write(pcdev, CRCNTR, 0);
721 ceu_write(pcdev, CRCMPR, 0);
722
723 value = 0x00000010; /* data fetch by default */
724 yuv_lineskip = 0;
725
726 switch (icd->current_fmt->host_fmt->fourcc) {
727 case V4L2_PIX_FMT_NV12:
728 case V4L2_PIX_FMT_NV21:
729 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
730 /* fall-through */
731 case V4L2_PIX_FMT_NV16:
732 case V4L2_PIX_FMT_NV61:
733 switch (cam->code) {
734 case V4L2_MBUS_FMT_UYVY8_2X8:
735 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
736 break;
737 case V4L2_MBUS_FMT_VYUY8_2X8:
738 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
739 break;
740 case V4L2_MBUS_FMT_YUYV8_2X8:
741 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
742 break;
743 case V4L2_MBUS_FMT_YVYU8_2X8:
744 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
745 break;
746 default:
747 BUG();
748 }
749 }
750
751 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
752 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
753 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
754
755 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
756 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
757 value |= pcdev->is_16bit ? 1 << 12 : 0;
758
759 /* CSI2 mode */
760 if (pcdev->pdata->csi2_dev)
761 value |= 3 << 12;
762
763 ceu_write(pcdev, CAMCR, value);
764
765 ceu_write(pcdev, CAPCR, 0x00300000);
766
767 switch (pcdev->field) {
768 case V4L2_FIELD_INTERLACED_TB:
769 value = 0x101;
770 break;
771 case V4L2_FIELD_INTERLACED_BT:
772 value = 0x102;
773 break;
774 default:
775 value = 0;
776 break;
777 }
778 ceu_write(pcdev, CAIFR, value);
779
780 sh_mobile_ceu_set_rect(icd);
781 mdelay(1);
782
783 dev_geo(icd->dev.parent, "CFLCR 0x%x\n", pcdev->cflcr);
784 ceu_write(pcdev, CFLCR, pcdev->cflcr);
785
786 /*
787 * A few words about byte order (observed in Big Endian mode)
788 *
789 * In data fetch mode bytes are received in chunks of 8 bytes.
790 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
791 *
792 * The data is however by default written to memory in reverse order:
793 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
794 *
795 * The lowest three bits of CDOCR allows us to do swapping,
796 * using 7 we swap the data bytes to match the incoming order:
797 * D0, D1, D2, D3, D4, D5, D6, D7
798 */
799 value = 0x00000017;
800 if (yuv_lineskip)
801 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
802
803 ceu_write(pcdev, CDOCR, value);
804 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
805
806 dev_dbg(icd->dev.parent, "S_FMT successful for %c%c%c%c %ux%u\n",
807 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
808 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
809 icd->user_width, icd->user_height);
810
811 capture_restore(pcdev, capsr);
812
813 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
814 return 0;
815 }
816
817 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
818 unsigned char buswidth)
819 {
820 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
821 struct sh_mobile_ceu_dev *pcdev = ici->priv;
822 unsigned long camera_flags, common_flags;
823
824 camera_flags = icd->ops->query_bus_param(icd);
825 common_flags = soc_camera_bus_param_compatible(camera_flags,
826 make_bus_param(pcdev));
827 if (!common_flags || buswidth > 16 ||
828 (buswidth > 8 && !(common_flags & SOCAM_DATAWIDTH_16)))
829 return -EINVAL;
830
831 return 0;
832 }
833
834 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
835 {
836 .fourcc = V4L2_PIX_FMT_NV12,
837 .name = "NV12",
838 .bits_per_sample = 12,
839 .packing = SOC_MBUS_PACKING_NONE,
840 .order = SOC_MBUS_ORDER_LE,
841 }, {
842 .fourcc = V4L2_PIX_FMT_NV21,
843 .name = "NV21",
844 .bits_per_sample = 12,
845 .packing = SOC_MBUS_PACKING_NONE,
846 .order = SOC_MBUS_ORDER_LE,
847 }, {
848 .fourcc = V4L2_PIX_FMT_NV16,
849 .name = "NV16",
850 .bits_per_sample = 16,
851 .packing = SOC_MBUS_PACKING_NONE,
852 .order = SOC_MBUS_ORDER_LE,
853 }, {
854 .fourcc = V4L2_PIX_FMT_NV61,
855 .name = "NV61",
856 .bits_per_sample = 16,
857 .packing = SOC_MBUS_PACKING_NONE,
858 .order = SOC_MBUS_ORDER_LE,
859 },
860 };
861
862 /* This will be corrected as we get more formats */
863 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
864 {
865 return fmt->packing == SOC_MBUS_PACKING_NONE ||
866 (fmt->bits_per_sample == 8 &&
867 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
868 (fmt->bits_per_sample > 8 &&
869 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
870 }
871
872 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
873
874 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
875 struct soc_camera_format_xlate *xlate)
876 {
877 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
878 struct device *dev = icd->dev.parent;
879 struct soc_camera_host *ici = to_soc_camera_host(dev);
880 struct sh_mobile_ceu_dev *pcdev = ici->priv;
881 int ret, k, n;
882 int formats = 0;
883 struct sh_mobile_ceu_cam *cam;
884 enum v4l2_mbus_pixelcode code;
885 const struct soc_mbus_pixelfmt *fmt;
886
887 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
888 if (ret < 0)
889 /* No more formats */
890 return 0;
891
892 fmt = soc_mbus_get_fmtdesc(code);
893 if (!fmt) {
894 dev_err(dev, "Invalid format code #%u: %d\n", idx, code);
895 return -EINVAL;
896 }
897
898 if (!pcdev->pdata->csi2_dev) {
899 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
900 if (ret < 0)
901 return 0;
902 }
903
904 if (!icd->host_priv) {
905 struct v4l2_mbus_framefmt mf;
906 struct v4l2_rect rect;
907 int shift = 0;
908
909 /* FIXME: subwindow is lost between close / open */
910
911 /* Cache current client geometry */
912 ret = client_g_rect(sd, &rect);
913 if (ret < 0)
914 return ret;
915
916 /* First time */
917 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
918 if (ret < 0)
919 return ret;
920
921 while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
922 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
923 mf.width = 2560 >> shift;
924 mf.height = 1920 >> shift;
925 ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
926 s_mbus_fmt, &mf);
927 if (ret < 0)
928 return ret;
929 shift++;
930 }
931
932 if (shift == 4) {
933 dev_err(dev, "Failed to configure the client below %ux%x\n",
934 mf.width, mf.height);
935 return -EIO;
936 }
937
938 dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
939
940 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
941 if (!cam)
942 return -ENOMEM;
943
944 /* We are called with current camera crop, initialise subrect with it */
945 cam->rect = rect;
946 cam->subrect = rect;
947
948 cam->width = mf.width;
949 cam->height = mf.height;
950
951 cam->width = mf.width;
952 cam->height = mf.height;
953
954 icd->host_priv = cam;
955 } else {
956 cam = icd->host_priv;
957 }
958
959 /* Beginning of a pass */
960 if (!idx)
961 cam->extra_fmt = NULL;
962
963 switch (code) {
964 case V4L2_MBUS_FMT_UYVY8_2X8:
965 case V4L2_MBUS_FMT_VYUY8_2X8:
966 case V4L2_MBUS_FMT_YUYV8_2X8:
967 case V4L2_MBUS_FMT_YVYU8_2X8:
968 if (cam->extra_fmt)
969 break;
970
971 /*
972 * Our case is simple so far: for any of the above four camera
973 * formats we add all our four synthesized NV* formats, so,
974 * just marking the device with a single flag suffices. If
975 * the format generation rules are more complex, you would have
976 * to actually hang your already added / counted formats onto
977 * the host_priv pointer and check whether the format you're
978 * going to add now is already there.
979 */
980 cam->extra_fmt = sh_mobile_ceu_formats;
981
982 n = ARRAY_SIZE(sh_mobile_ceu_formats);
983 formats += n;
984 for (k = 0; xlate && k < n; k++) {
985 xlate->host_fmt = &sh_mobile_ceu_formats[k];
986 xlate->code = code;
987 xlate++;
988 dev_dbg(dev, "Providing format %s using code %d\n",
989 sh_mobile_ceu_formats[k].name, code);
990 }
991 break;
992 default:
993 if (!sh_mobile_ceu_packing_supported(fmt))
994 return 0;
995 }
996
997 /* Generic pass-through */
998 formats++;
999 if (xlate) {
1000 xlate->host_fmt = fmt;
1001 xlate->code = code;
1002 xlate++;
1003 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1004 fmt->name);
1005 }
1006
1007 return formats;
1008 }
1009
1010 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1011 {
1012 kfree(icd->host_priv);
1013 icd->host_priv = NULL;
1014 }
1015
1016 /* Check if any dimension of r1 is smaller than respective one of r2 */
1017 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1018 {
1019 return r1->width < r2->width || r1->height < r2->height;
1020 }
1021
1022 /* Check if r1 fails to cover r2 */
1023 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1024 {
1025 return r1->left > r2->left || r1->top > r2->top ||
1026 r1->left + r1->width < r2->left + r2->width ||
1027 r1->top + r1->height < r2->top + r2->height;
1028 }
1029
1030 static unsigned int scale_down(unsigned int size, unsigned int scale)
1031 {
1032 return (size * 4096 + scale / 2) / scale;
1033 }
1034
1035 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1036 {
1037 return (input * 4096 + output / 2) / output;
1038 }
1039
1040 /* Get and store current client crop */
1041 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1042 {
1043 struct v4l2_crop crop;
1044 struct v4l2_cropcap cap;
1045 int ret;
1046
1047 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1048
1049 ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1050 if (!ret) {
1051 *rect = crop.c;
1052 return ret;
1053 }
1054
1055 /* Camera driver doesn't support .g_crop(), assume default rectangle */
1056 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1057
1058 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1059 if (!ret)
1060 *rect = cap.defrect;
1061
1062 return ret;
1063 }
1064
1065 /* Client crop has changed, update our sub-rectangle to remain within the area */
1066 static void update_subrect(struct sh_mobile_ceu_cam *cam)
1067 {
1068 struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1069
1070 if (rect->width < subrect->width)
1071 subrect->width = rect->width;
1072
1073 if (rect->height < subrect->height)
1074 subrect->height = rect->height;
1075
1076 if (rect->left > subrect->left)
1077 subrect->left = rect->left;
1078 else if (rect->left + rect->width >
1079 subrect->left + subrect->width)
1080 subrect->left = rect->left + rect->width -
1081 subrect->width;
1082
1083 if (rect->top > subrect->top)
1084 subrect->top = rect->top;
1085 else if (rect->top + rect->height >
1086 subrect->top + subrect->height)
1087 subrect->top = rect->top + rect->height -
1088 subrect->height;
1089 }
1090
1091 /*
1092 * The common for both scaling and cropping iterative approach is:
1093 * 1. try if the client can produce exactly what requested by the user
1094 * 2. if (1) failed, try to double the client image until we get one big enough
1095 * 3. if (2) failed, try to request the maximum image
1096 */
1097 static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1098 struct v4l2_crop *cam_crop)
1099 {
1100 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1101 struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1102 struct device *dev = sd->v4l2_dev->dev;
1103 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1104 struct v4l2_cropcap cap;
1105 int ret;
1106 unsigned int width, height;
1107
1108 v4l2_subdev_call(sd, video, s_crop, crop);
1109 ret = client_g_rect(sd, cam_rect);
1110 if (ret < 0)
1111 return ret;
1112
1113 /*
1114 * Now cam_crop contains the current camera input rectangle, and it must
1115 * be within camera cropcap bounds
1116 */
1117 if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1118 /* Even if camera S_CROP failed, but camera rectangle matches */
1119 dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1120 rect->width, rect->height, rect->left, rect->top);
1121 cam->rect = *cam_rect;
1122 return 0;
1123 }
1124
1125 /* Try to fix cropping, that camera hasn't managed to set */
1126 dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1127 cam_rect->width, cam_rect->height,
1128 cam_rect->left, cam_rect->top,
1129 rect->width, rect->height, rect->left, rect->top);
1130
1131 /* We need sensor maximum rectangle */
1132 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1133 if (ret < 0)
1134 return ret;
1135
1136 /* Put user requested rectangle within sensor bounds */
1137 soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1138 cap.bounds.width);
1139 soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1140 cap.bounds.height);
1141
1142 /*
1143 * Popular special case - some cameras can only handle fixed sizes like
1144 * QVGA, VGA,... Take care to avoid infinite loop.
1145 */
1146 width = max(cam_rect->width, 2);
1147 height = max(cam_rect->height, 2);
1148
1149 /*
1150 * Loop as long as sensor is not covering the requested rectangle and
1151 * is still within its bounds
1152 */
1153 while (!ret && (is_smaller(cam_rect, rect) ||
1154 is_inside(cam_rect, rect)) &&
1155 (cap.bounds.width > width || cap.bounds.height > height)) {
1156
1157 width *= 2;
1158 height *= 2;
1159
1160 cam_rect->width = width;
1161 cam_rect->height = height;
1162
1163 /*
1164 * We do not know what capabilities the camera has to set up
1165 * left and top borders. We could try to be smarter in iterating
1166 * them, e.g., if camera current left is to the right of the
1167 * target left, set it to the middle point between the current
1168 * left and minimum left. But that would add too much
1169 * complexity: we would have to iterate each border separately.
1170 * Instead we just drop to the left and top bounds.
1171 */
1172 if (cam_rect->left > rect->left)
1173 cam_rect->left = cap.bounds.left;
1174
1175 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1176 cam_rect->width = rect->left + rect->width -
1177 cam_rect->left;
1178
1179 if (cam_rect->top > rect->top)
1180 cam_rect->top = cap.bounds.top;
1181
1182 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1183 cam_rect->height = rect->top + rect->height -
1184 cam_rect->top;
1185
1186 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1187 ret = client_g_rect(sd, cam_rect);
1188 dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1189 cam_rect->width, cam_rect->height,
1190 cam_rect->left, cam_rect->top);
1191 }
1192
1193 /* S_CROP must not modify the rectangle */
1194 if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1195 /*
1196 * The camera failed to configure a suitable cropping,
1197 * we cannot use the current rectangle, set to max
1198 */
1199 *cam_rect = cap.bounds;
1200 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1201 ret = client_g_rect(sd, cam_rect);
1202 dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1203 cam_rect->width, cam_rect->height,
1204 cam_rect->left, cam_rect->top);
1205 }
1206
1207 if (!ret) {
1208 cam->rect = *cam_rect;
1209 update_subrect(cam);
1210 }
1211
1212 return ret;
1213 }
1214
1215 /* Iterative s_mbus_fmt, also updates cached client crop on success */
1216 static int client_s_fmt(struct soc_camera_device *icd,
1217 struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1218 {
1219 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1220 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1221 struct device *dev = icd->dev.parent;
1222 unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1223 unsigned int max_width, max_height;
1224 struct v4l2_cropcap cap;
1225 int ret;
1226
1227 ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
1228 s_mbus_fmt, mf);
1229 if (ret < 0)
1230 return ret;
1231
1232 dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1233
1234 if ((width == mf->width && height == mf->height) || !ceu_can_scale)
1235 goto update_cache;
1236
1237 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1238
1239 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1240 if (ret < 0)
1241 return ret;
1242
1243 max_width = min(cap.bounds.width, 2560);
1244 max_height = min(cap.bounds.height, 1920);
1245
1246 /* Camera set a format, but geometry is not precise, try to improve */
1247 tmp_w = mf->width;
1248 tmp_h = mf->height;
1249
1250 /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1251 while ((width > tmp_w || height > tmp_h) &&
1252 tmp_w < max_width && tmp_h < max_height) {
1253 tmp_w = min(2 * tmp_w, max_width);
1254 tmp_h = min(2 * tmp_h, max_height);
1255 mf->width = tmp_w;
1256 mf->height = tmp_h;
1257 ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
1258 s_mbus_fmt, mf);
1259 dev_geo(dev, "Camera scaled to %ux%u\n",
1260 mf->width, mf->height);
1261 if (ret < 0) {
1262 /* This shouldn't happen */
1263 dev_err(dev, "Client failed to set format: %d\n", ret);
1264 return ret;
1265 }
1266 }
1267
1268 update_cache:
1269 /* Update cache */
1270 ret = client_g_rect(sd, &cam->rect);
1271 if (ret < 0)
1272 return ret;
1273
1274 update_subrect(cam);
1275
1276 return 0;
1277 }
1278
1279 /**
1280 * @width - on output: user width, mapped back to input
1281 * @height - on output: user height, mapped back to input
1282 * @mf - in- / output camera output window
1283 */
1284 static int client_scale(struct soc_camera_device *icd,
1285 struct v4l2_mbus_framefmt *mf,
1286 unsigned int *width, unsigned int *height,
1287 bool ceu_can_scale)
1288 {
1289 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1290 struct device *dev = icd->dev.parent;
1291 struct v4l2_mbus_framefmt mf_tmp = *mf;
1292 unsigned int scale_h, scale_v;
1293 int ret;
1294
1295 /*
1296 * 5. Apply iterative camera S_FMT for camera user window (also updates
1297 * client crop cache and the imaginary sub-rectangle).
1298 */
1299 ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1300 if (ret < 0)
1301 return ret;
1302
1303 dev_geo(dev, "5: camera scaled to %ux%u\n",
1304 mf_tmp.width, mf_tmp.height);
1305
1306 /* 6. Retrieve camera output window (g_fmt) */
1307
1308 /* unneeded - it is already in "mf_tmp" */
1309
1310 /* 7. Calculate new client scales. */
1311 scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1312 scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1313
1314 mf->width = mf_tmp.width;
1315 mf->height = mf_tmp.height;
1316 mf->colorspace = mf_tmp.colorspace;
1317
1318 /*
1319 * 8. Calculate new CEU crop - apply camera scales to previously
1320 * updated "effective" crop.
1321 */
1322 *width = scale_down(cam->subrect.width, scale_h);
1323 *height = scale_down(cam->subrect.height, scale_v);
1324
1325 dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1326
1327 return 0;
1328 }
1329
1330 /*
1331 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1332 * framerate by always requesting the maximum image from the client. See
1333 * Documentation/video4linux/sh_mobile_camera_ceu.txt for a description of
1334 * scaling and cropping algorithms and for the meaning of referenced here steps.
1335 */
1336 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1337 struct v4l2_crop *a)
1338 {
1339 struct v4l2_rect *rect = &a->c;
1340 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1341 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1342 struct v4l2_crop cam_crop;
1343 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1344 struct v4l2_rect *cam_rect = &cam_crop.c;
1345 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1346 struct device *dev = icd->dev.parent;
1347 struct v4l2_mbus_framefmt mf;
1348 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1349 out_width, out_height;
1350 int interm_width, interm_height;
1351 u32 capsr, cflcr;
1352 int ret;
1353
1354 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1355 rect->left, rect->top);
1356
1357 /* During camera cropping its output window can change too, stop CEU */
1358 capsr = capture_save_reset(pcdev);
1359 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1360
1361 /* 1. - 2. Apply iterative camera S_CROP for new input window. */
1362 ret = client_s_crop(icd, a, &cam_crop);
1363 if (ret < 0)
1364 return ret;
1365
1366 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1367 cam_rect->width, cam_rect->height,
1368 cam_rect->left, cam_rect->top);
1369
1370 /* On success cam_crop contains current camera crop */
1371
1372 /* 3. Retrieve camera output window */
1373 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1374 if (ret < 0)
1375 return ret;
1376
1377 if (mf.width > 2560 || mf.height > 1920)
1378 return -EINVAL;
1379
1380 /* Cache camera output window */
1381 cam->width = mf.width;
1382 cam->height = mf.height;
1383
1384 /* 4. Calculate camera scales */
1385 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1386 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1387
1388 /* Calculate intermediate window */
1389 interm_width = scale_down(rect->width, scale_cam_h);
1390 interm_height = scale_down(rect->height, scale_cam_v);
1391
1392 if (pcdev->image_mode) {
1393 out_width = min(interm_width, icd->user_width);
1394 out_height = min(interm_height, icd->user_height);
1395 } else {
1396 out_width = interm_width;
1397 out_height = interm_height;
1398 }
1399
1400 /*
1401 * 5. Calculate CEU scales from camera scales from results of (5) and
1402 * the user window
1403 */
1404 scale_ceu_h = calc_scale(interm_width, &out_width);
1405 scale_ceu_v = calc_scale(interm_height, &out_height);
1406
1407 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1408
1409 /* Apply CEU scales. */
1410 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1411 if (cflcr != pcdev->cflcr) {
1412 pcdev->cflcr = cflcr;
1413 ceu_write(pcdev, CFLCR, cflcr);
1414 }
1415
1416 icd->user_width = out_width;
1417 icd->user_height = out_height;
1418 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1419 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1420
1421 /* 6. Use CEU cropping to crop to the new window. */
1422 sh_mobile_ceu_set_rect(icd);
1423
1424 cam->subrect = *rect;
1425
1426 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1427 icd->user_width, icd->user_height,
1428 cam->ceu_left, cam->ceu_top);
1429
1430 /* Restore capture. The CE bit can be cleared by the hardware */
1431 if (pcdev->active)
1432 capsr |= 1;
1433 capture_restore(pcdev, capsr);
1434
1435 /* Even if only camera cropping succeeded */
1436 return ret;
1437 }
1438
1439 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1440 struct v4l2_crop *a)
1441 {
1442 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1443
1444 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1445 a->c = cam->subrect;
1446
1447 return 0;
1448 }
1449
1450 /*
1451 * Calculate real client output window by applying new scales to the current
1452 * client crop. New scales are calculated from the requested output format and
1453 * CEU crop, mapped backed onto the client input (subrect).
1454 */
1455 static void calculate_client_output(struct soc_camera_device *icd,
1456 struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1457 {
1458 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1459 struct device *dev = icd->dev.parent;
1460 struct v4l2_rect *cam_subrect = &cam->subrect;
1461 unsigned int scale_v, scale_h;
1462
1463 if (cam_subrect->width == cam->rect.width &&
1464 cam_subrect->height == cam->rect.height) {
1465 /* No sub-cropping */
1466 mf->width = pix->width;
1467 mf->height = pix->height;
1468 return;
1469 }
1470
1471 /* 1.-2. Current camera scales and subwin - cached. */
1472
1473 dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1474 cam_subrect->width, cam_subrect->height,
1475 cam_subrect->left, cam_subrect->top);
1476
1477 /*
1478 * 3. Calculate new combined scales from input sub-window to requested
1479 * user window.
1480 */
1481
1482 /*
1483 * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1484 * (128x96) or larger than VGA
1485 */
1486 scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1487 scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1488
1489 dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1490
1491 /*
1492 * 4. Calculate client output window by applying combined scales to real
1493 * input window.
1494 */
1495 mf->width = scale_down(cam->rect.width, scale_h);
1496 mf->height = scale_down(cam->rect.height, scale_v);
1497 }
1498
1499 /* Similar to set_crop multistage iterative algorithm */
1500 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1501 struct v4l2_format *f)
1502 {
1503 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1504 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1505 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1506 struct v4l2_pix_format *pix = &f->fmt.pix;
1507 struct v4l2_mbus_framefmt mf;
1508 struct device *dev = icd->dev.parent;
1509 __u32 pixfmt = pix->pixelformat;
1510 const struct soc_camera_format_xlate *xlate;
1511 /* Keep Compiler Happy */
1512 unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
1513 u16 scale_v, scale_h;
1514 int ret;
1515 bool image_mode;
1516 enum v4l2_field field;
1517
1518 dev_geo(dev, "S_FMT(pix=0x%x, %ux%u)\n", pixfmt, pix->width, pix->height);
1519
1520 switch (pix->field) {
1521 default:
1522 pix->field = V4L2_FIELD_NONE;
1523 /* fall-through */
1524 case V4L2_FIELD_INTERLACED_TB:
1525 case V4L2_FIELD_INTERLACED_BT:
1526 case V4L2_FIELD_NONE:
1527 field = pix->field;
1528 break;
1529 case V4L2_FIELD_INTERLACED:
1530 field = V4L2_FIELD_INTERLACED_TB;
1531 break;
1532 }
1533
1534 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1535 if (!xlate) {
1536 dev_warn(dev, "Format %x not found\n", pixfmt);
1537 return -EINVAL;
1538 }
1539
1540 /* 1.-4. Calculate client output geometry */
1541 calculate_client_output(icd, &f->fmt.pix, &mf);
1542 mf.field = pix->field;
1543 mf.colorspace = pix->colorspace;
1544 mf.code = xlate->code;
1545
1546 switch (pixfmt) {
1547 case V4L2_PIX_FMT_NV12:
1548 case V4L2_PIX_FMT_NV21:
1549 case V4L2_PIX_FMT_NV16:
1550 case V4L2_PIX_FMT_NV61:
1551 image_mode = true;
1552 break;
1553 default:
1554 image_mode = false;
1555 }
1556
1557 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1558
1559 /* 5. - 9. */
1560 ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1561 image_mode && V4L2_FIELD_NONE == field);
1562
1563 dev_geo(dev, "5-9: client scale return %d\n", ret);
1564
1565 /* Done with the camera. Now see if we can improve the result */
1566
1567 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1568 mf.width, mf.height, pix->width, pix->height);
1569 if (ret < 0)
1570 return ret;
1571
1572 if (mf.code != xlate->code)
1573 return -EINVAL;
1574
1575 /* 9. Prepare CEU crop */
1576 cam->width = mf.width;
1577 cam->height = mf.height;
1578
1579 /* 10. Use CEU scaling to scale to the requested user window. */
1580
1581 /* We cannot scale up */
1582 if (pix->width > ceu_sub_width)
1583 ceu_sub_width = pix->width;
1584
1585 if (pix->height > ceu_sub_height)
1586 ceu_sub_height = pix->height;
1587
1588 pix->colorspace = mf.colorspace;
1589
1590 if (image_mode) {
1591 /* Scale pix->{width x height} down to width x height */
1592 scale_h = calc_scale(ceu_sub_width, &pix->width);
1593 scale_v = calc_scale(ceu_sub_height, &pix->height);
1594 } else {
1595 pix->width = ceu_sub_width;
1596 pix->height = ceu_sub_height;
1597 scale_h = 0;
1598 scale_v = 0;
1599 }
1600
1601 pcdev->cflcr = scale_h | (scale_v << 16);
1602
1603 /*
1604 * We have calculated CFLCR, the actual configuration will be performed
1605 * in sh_mobile_ceu_set_bus_param()
1606 */
1607
1608 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1609 ceu_sub_width, scale_h, pix->width,
1610 ceu_sub_height, scale_v, pix->height);
1611
1612 cam->code = xlate->code;
1613 icd->current_fmt = xlate;
1614
1615 pcdev->field = field;
1616 pcdev->image_mode = image_mode;
1617
1618 return 0;
1619 }
1620
1621 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1622 struct v4l2_format *f)
1623 {
1624 const struct soc_camera_format_xlate *xlate;
1625 struct v4l2_pix_format *pix = &f->fmt.pix;
1626 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1627 struct v4l2_mbus_framefmt mf;
1628 __u32 pixfmt = pix->pixelformat;
1629 int width, height;
1630 int ret;
1631
1632 dev_geo(icd->dev.parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1633 pixfmt, pix->width, pix->height);
1634
1635 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1636 if (!xlate) {
1637 dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
1638 return -EINVAL;
1639 }
1640
1641 /* FIXME: calculate using depth and bus width */
1642
1643 v4l_bound_align_image(&pix->width, 2, 2560, 1,
1644 &pix->height, 4, 1920, 2, 0);
1645
1646 width = pix->width;
1647 height = pix->height;
1648
1649 pix->bytesperline = soc_mbus_bytes_per_line(width, xlate->host_fmt);
1650 if ((int)pix->bytesperline < 0)
1651 return pix->bytesperline;
1652 pix->sizeimage = height * pix->bytesperline;
1653
1654 /* limit to sensor capabilities */
1655 mf.width = pix->width;
1656 mf.height = pix->height;
1657 mf.field = pix->field;
1658 mf.code = xlate->code;
1659 mf.colorspace = pix->colorspace;
1660
1661 ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video, try_mbus_fmt, &mf);
1662 if (ret < 0)
1663 return ret;
1664
1665 pix->width = mf.width;
1666 pix->height = mf.height;
1667 pix->field = mf.field;
1668 pix->colorspace = mf.colorspace;
1669
1670 switch (pixfmt) {
1671 case V4L2_PIX_FMT_NV12:
1672 case V4L2_PIX_FMT_NV21:
1673 case V4L2_PIX_FMT_NV16:
1674 case V4L2_PIX_FMT_NV61:
1675 /* FIXME: check against rect_max after converting soc-camera */
1676 /* We can scale precisely, need a bigger image from camera */
1677 if (pix->width < width || pix->height < height) {
1678 /*
1679 * We presume, the sensor behaves sanely, i.e., if
1680 * requested a bigger rectangle, it will not return a
1681 * smaller one.
1682 */
1683 mf.width = 2560;
1684 mf.height = 1920;
1685 ret = v4l2_device_call_until_err(sd->v4l2_dev, 0, video,
1686 try_mbus_fmt, &mf);
1687 if (ret < 0) {
1688 /* Shouldn't actually happen... */
1689 dev_err(icd->dev.parent,
1690 "FIXME: client try_fmt() = %d\n", ret);
1691 return ret;
1692 }
1693 }
1694 /* We will scale exactly */
1695 if (mf.width > width)
1696 pix->width = width;
1697 if (mf.height > height)
1698 pix->height = height;
1699 }
1700
1701 dev_geo(icd->dev.parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1702 __func__, ret, pix->pixelformat, pix->width, pix->height);
1703
1704 return ret;
1705 }
1706
1707 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1708 {
1709 struct soc_camera_device *icd = file->private_data;
1710
1711 return vb2_poll(&icd->vb2_vidq, file, pt);
1712 }
1713
1714 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1715 struct v4l2_capability *cap)
1716 {
1717 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1718 cap->version = KERNEL_VERSION(0, 0, 5);
1719 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1720 return 0;
1721 }
1722
1723 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1724 struct soc_camera_device *icd)
1725 {
1726 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1727 q->io_modes = VB2_MMAP | VB2_USERPTR;
1728 q->drv_priv = icd;
1729 q->ops = &sh_mobile_ceu_videobuf_ops;
1730 q->mem_ops = &vb2_dma_contig_memops;
1731 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1732
1733 return vb2_queue_init(q);
1734 }
1735
1736 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
1737 struct v4l2_control *ctrl)
1738 {
1739 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1740 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1741 u32 val;
1742
1743 switch (ctrl->id) {
1744 case V4L2_CID_SHARPNESS:
1745 val = ceu_read(pcdev, CLFCR);
1746 ctrl->value = val ^ 1;
1747 return 0;
1748 }
1749 return -ENOIOCTLCMD;
1750 }
1751
1752 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
1753 struct v4l2_control *ctrl)
1754 {
1755 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1756 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1757
1758 switch (ctrl->id) {
1759 case V4L2_CID_SHARPNESS:
1760 switch (icd->current_fmt->host_fmt->fourcc) {
1761 case V4L2_PIX_FMT_NV12:
1762 case V4L2_PIX_FMT_NV21:
1763 case V4L2_PIX_FMT_NV16:
1764 case V4L2_PIX_FMT_NV61:
1765 ceu_write(pcdev, CLFCR, !ctrl->value);
1766 return 0;
1767 }
1768 return -EINVAL;
1769 }
1770 return -ENOIOCTLCMD;
1771 }
1772
1773 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
1774 {
1775 .id = V4L2_CID_SHARPNESS,
1776 .type = V4L2_CTRL_TYPE_BOOLEAN,
1777 .name = "Low-pass filter",
1778 .minimum = 0,
1779 .maximum = 1,
1780 .step = 1,
1781 .default_value = 0,
1782 },
1783 };
1784
1785 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1786 .owner = THIS_MODULE,
1787 .add = sh_mobile_ceu_add_device,
1788 .remove = sh_mobile_ceu_remove_device,
1789 .get_formats = sh_mobile_ceu_get_formats,
1790 .put_formats = sh_mobile_ceu_put_formats,
1791 .get_crop = sh_mobile_ceu_get_crop,
1792 .set_crop = sh_mobile_ceu_set_crop,
1793 .set_fmt = sh_mobile_ceu_set_fmt,
1794 .try_fmt = sh_mobile_ceu_try_fmt,
1795 .set_ctrl = sh_mobile_ceu_set_ctrl,
1796 .get_ctrl = sh_mobile_ceu_get_ctrl,
1797 .poll = sh_mobile_ceu_poll,
1798 .querycap = sh_mobile_ceu_querycap,
1799 .set_bus_param = sh_mobile_ceu_set_bus_param,
1800 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1801 .controls = sh_mobile_ceu_controls,
1802 .num_controls = ARRAY_SIZE(sh_mobile_ceu_controls),
1803 };
1804
1805 struct bus_wait {
1806 struct notifier_block notifier;
1807 struct completion completion;
1808 struct device *dev;
1809 };
1810
1811 static int bus_notify(struct notifier_block *nb,
1812 unsigned long action, void *data)
1813 {
1814 struct device *dev = data;
1815 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1816
1817 if (wait->dev != dev)
1818 return NOTIFY_DONE;
1819
1820 switch (action) {
1821 case BUS_NOTIFY_UNBOUND_DRIVER:
1822 /* Protect from module unloading */
1823 wait_for_completion(&wait->completion);
1824 return NOTIFY_OK;
1825 }
1826 return NOTIFY_DONE;
1827 }
1828
1829 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
1830 {
1831 struct sh_mobile_ceu_dev *pcdev;
1832 struct resource *res;
1833 void __iomem *base;
1834 unsigned int irq;
1835 int err = 0;
1836 struct bus_wait wait = {
1837 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
1838 .notifier.notifier_call = bus_notify,
1839 };
1840 struct device *csi2;
1841
1842 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1843 irq = platform_get_irq(pdev, 0);
1844 if (!res || (int)irq <= 0) {
1845 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1846 err = -ENODEV;
1847 goto exit;
1848 }
1849
1850 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1851 if (!pcdev) {
1852 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1853 err = -ENOMEM;
1854 goto exit;
1855 }
1856
1857 INIT_LIST_HEAD(&pcdev->capture);
1858 spin_lock_init(&pcdev->lock);
1859
1860 pcdev->pdata = pdev->dev.platform_data;
1861 if (!pcdev->pdata) {
1862 err = -EINVAL;
1863 dev_err(&pdev->dev, "CEU platform data not set.\n");
1864 goto exit_kfree;
1865 }
1866
1867 base = ioremap_nocache(res->start, resource_size(res));
1868 if (!base) {
1869 err = -ENXIO;
1870 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
1871 goto exit_kfree;
1872 }
1873
1874 pcdev->irq = irq;
1875 pcdev->base = base;
1876 pcdev->video_limit = 0; /* only enabled if second resource exists */
1877
1878 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1879 if (res) {
1880 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1881 res->start,
1882 resource_size(res),
1883 DMA_MEMORY_MAP |
1884 DMA_MEMORY_EXCLUSIVE);
1885 if (!err) {
1886 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1887 err = -ENXIO;
1888 goto exit_iounmap;
1889 }
1890
1891 pcdev->video_limit = resource_size(res);
1892 }
1893
1894 /* request irq */
1895 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
1896 dev_name(&pdev->dev), pcdev);
1897 if (err) {
1898 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1899 goto exit_release_mem;
1900 }
1901
1902 pm_suspend_ignore_children(&pdev->dev, true);
1903 pm_runtime_enable(&pdev->dev);
1904 pm_runtime_resume(&pdev->dev);
1905
1906 pcdev->ici.priv = pcdev;
1907 pcdev->ici.v4l2_dev.dev = &pdev->dev;
1908 pcdev->ici.nr = pdev->id;
1909 pcdev->ici.drv_name = dev_name(&pdev->dev);
1910 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1911
1912 /* CSI2 interfacing */
1913 csi2 = pcdev->pdata->csi2_dev;
1914 if (csi2) {
1915 wait.dev = csi2;
1916
1917 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
1918 if (err < 0)
1919 goto exit_free_clk;
1920
1921 /*
1922 * From this point the driver module will not unload, until
1923 * we complete the completion.
1924 */
1925
1926 if (!csi2->driver) {
1927 complete(&wait.completion);
1928 /* Either too late, or probing failed */
1929 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
1930 err = -ENXIO;
1931 goto exit_free_clk;
1932 }
1933
1934 /*
1935 * The module is still loaded, in the worst case it is hanging
1936 * in device release on our completion. So, _now_ dereferencing
1937 * the "owner" is safe!
1938 */
1939
1940 err = try_module_get(csi2->driver->owner);
1941
1942 /* Let notifier complete, if it has been locked */
1943 complete(&wait.completion);
1944 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
1945 if (!err) {
1946 err = -ENODEV;
1947 goto exit_free_clk;
1948 }
1949 }
1950
1951 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1952 if (IS_ERR(pcdev->alloc_ctx)) {
1953 err = PTR_ERR(pcdev->alloc_ctx);
1954 goto exit_module_put;
1955 }
1956
1957 err = soc_camera_host_register(&pcdev->ici);
1958 if (err)
1959 goto exit_free_ctx;
1960
1961 return 0;
1962
1963 exit_free_ctx:
1964 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1965 exit_module_put:
1966 if (csi2 && csi2->driver)
1967 module_put(csi2->driver->owner);
1968 exit_free_clk:
1969 pm_runtime_disable(&pdev->dev);
1970 free_irq(pcdev->irq, pcdev);
1971 exit_release_mem:
1972 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1973 dma_release_declared_memory(&pdev->dev);
1974 exit_iounmap:
1975 iounmap(base);
1976 exit_kfree:
1977 kfree(pcdev);
1978 exit:
1979 return err;
1980 }
1981
1982 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
1983 {
1984 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1985 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
1986 struct sh_mobile_ceu_dev, ici);
1987 struct device *csi2 = pcdev->pdata->csi2_dev;
1988
1989 soc_camera_host_unregister(soc_host);
1990 pm_runtime_disable(&pdev->dev);
1991 free_irq(pcdev->irq, pcdev);
1992 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1993 dma_release_declared_memory(&pdev->dev);
1994 iounmap(pcdev->base);
1995 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1996 if (csi2 && csi2->driver)
1997 module_put(csi2->driver->owner);
1998 kfree(pcdev);
1999
2000 return 0;
2001 }
2002
2003 static int sh_mobile_ceu_runtime_nop(struct device *dev)
2004 {
2005 /* Runtime PM callback shared between ->runtime_suspend()
2006 * and ->runtime_resume(). Simply returns success.
2007 *
2008 * This driver re-initializes all registers after
2009 * pm_runtime_get_sync() anyway so there is no need
2010 * to save and restore registers here.
2011 */
2012 return 0;
2013 }
2014
2015 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2016 .runtime_suspend = sh_mobile_ceu_runtime_nop,
2017 .runtime_resume = sh_mobile_ceu_runtime_nop,
2018 };
2019
2020 static struct platform_driver sh_mobile_ceu_driver = {
2021 .driver = {
2022 .name = "sh_mobile_ceu",
2023 .pm = &sh_mobile_ceu_dev_pm_ops,
2024 },
2025 .probe = sh_mobile_ceu_probe,
2026 .remove = __devexit_p(sh_mobile_ceu_remove),
2027 };
2028
2029 static int __init sh_mobile_ceu_init(void)
2030 {
2031 /* Whatever return code */
2032 request_module("sh_mobile_csi2");
2033 return platform_driver_register(&sh_mobile_ceu_driver);
2034 }
2035
2036 static void __exit sh_mobile_ceu_exit(void)
2037 {
2038 platform_driver_unregister(&sh_mobile_ceu_driver);
2039 }
2040
2041 module_init(sh_mobile_ceu_init);
2042 module_exit(sh_mobile_ceu_exit);
2043
2044 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2045 MODULE_AUTHOR("Magnus Damm");
2046 MODULE_LICENSE("GPL");
2047 MODULE_ALIAS("platform:sh_mobile_ceu");