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mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / drivers / media / platform / soc_camera / rcar_vin.c
blobd02a7e0b773f4c9acec74459ce4f8fe184f3674e
1 /*
2 * SoC-camera host driver for Renesas R-Car VIN unit
3 *
4 * Copyright (C) 2011-2013 Renesas Solutions Corp.
5 * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
6 *
7 * Based on V4L2 Driver for SuperH Mobile CEU interface "sh_mobile_ceu_camera.c"
8 *
9 * Copyright (C) 2008 Magnus Damm
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17 #include <linux/delay.h>
18 #include <linux/interrupt.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/platform_data/camera-rcar.h>
22 #include <linux/platform_device.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/videodev2.h>
26
27 #include <media/soc_camera.h>
28 #include <media/soc_mediabus.h>
29 #include <media/v4l2-common.h>
30 #include <media/v4l2-dev.h>
31 #include <media/v4l2-device.h>
32 #include <media/v4l2-mediabus.h>
33 #include <media/v4l2-subdev.h>
34 #include <media/videobuf2-dma-contig.h>
35
36 #include "soc_scale_crop.h"
37
38 #define DRV_NAME "rcar_vin"
39
40 /* Register offsets for R-Car VIN */
41 #define VNMC_REG 0x00 /* Video n Main Control Register */
42 #define VNMS_REG 0x04 /* Video n Module Status Register */
43 #define VNFC_REG 0x08 /* Video n Frame Capture Register */
44 #define VNSLPRC_REG 0x0C /* Video n Start Line Pre-Clip Register */
45 #define VNELPRC_REG 0x10 /* Video n End Line Pre-Clip Register */
46 #define VNSPPRC_REG 0x14 /* Video n Start Pixel Pre-Clip Register */
47 #define VNEPPRC_REG 0x18 /* Video n End Pixel Pre-Clip Register */
48 #define VNSLPOC_REG 0x1C /* Video n Start Line Post-Clip Register */
49 #define VNELPOC_REG 0x20 /* Video n End Line Post-Clip Register */
50 #define VNSPPOC_REG 0x24 /* Video n Start Pixel Post-Clip Register */
51 #define VNEPPOC_REG 0x28 /* Video n End Pixel Post-Clip Register */
52 #define VNIS_REG 0x2C /* Video n Image Stride Register */
53 #define VNMB_REG(m) (0x30 + ((m) << 2)) /* Video n Memory Base m Register */
54 #define VNIE_REG 0x40 /* Video n Interrupt Enable Register */
55 #define VNINTS_REG 0x44 /* Video n Interrupt Status Register */
56 #define VNSI_REG 0x48 /* Video n Scanline Interrupt Register */
57 #define VNMTC_REG 0x4C /* Video n Memory Transfer Control Register */
58 #define VNYS_REG 0x50 /* Video n Y Scale Register */
59 #define VNXS_REG 0x54 /* Video n X Scale Register */
60 #define VNDMR_REG 0x58 /* Video n Data Mode Register */
61 #define VNDMR2_REG 0x5C /* Video n Data Mode Register 2 */
62 #define VNUVAOF_REG 0x60 /* Video n UV Address Offset Register */
63
64 /* Register bit fields for R-Car VIN */
65 /* Video n Main Control Register bits */
66 #define VNMC_FOC (1 << 21)
67 #define VNMC_YCAL (1 << 19)
68 #define VNMC_INF_YUV8_BT656 (0 << 16)
69 #define VNMC_INF_YUV8_BT601 (1 << 16)
70 #define VNMC_INF_YUV16 (5 << 16)
71 #define VNMC_VUP (1 << 10)
72 #define VNMC_IM_ODD (0 << 3)
73 #define VNMC_IM_ODD_EVEN (1 << 3)
74 #define VNMC_IM_EVEN (2 << 3)
75 #define VNMC_IM_FULL (3 << 3)
76 #define VNMC_BPS (1 << 1)
77 #define VNMC_ME (1 << 0)
78
79 /* Video n Module Status Register bits */
80 #define VNMS_FBS_MASK (3 << 3)
81 #define VNMS_FBS_SHIFT 3
82 #define VNMS_AV (1 << 1)
83 #define VNMS_CA (1 << 0)
84
85 /* Video n Frame Capture Register bits */
86 #define VNFC_C_FRAME (1 << 1)
87 #define VNFC_S_FRAME (1 << 0)
88
89 /* Video n Interrupt Enable Register bits */
90 #define VNIE_FIE (1 << 4)
91 #define VNIE_EFE (1 << 1)
92
93 /* Video n Data Mode Register bits */
94 #define VNDMR_EXRGB (1 << 8)
95 #define VNDMR_BPSM (1 << 4)
96 #define VNDMR_DTMD_YCSEP (1 << 1)
97 #define VNDMR_DTMD_ARGB1555 (1 << 0)
98
99 /* Video n Data Mode Register 2 bits */
100 #define VNDMR2_VPS (1 << 30)
101 #define VNDMR2_HPS (1 << 29)
102 #define VNDMR2_FTEV (1 << 17)
103
104 #define VIN_MAX_WIDTH 2048
105 #define VIN_MAX_HEIGHT 2048
106
107 enum chip_id {
108 RCAR_H1,
109 RCAR_M1,
110 RCAR_E1,
111 };
112
113 enum rcar_vin_state {
114 STOPPED = 0,
115 RUNNING,
116 STOPPING,
117 };
118
119 struct rcar_vin_priv {
120 void __iomem *base;
121 spinlock_t lock;
122 int sequence;
123 /* State of the VIN module in capturing mode */
124 enum rcar_vin_state state;
125 struct rcar_vin_platform_data *pdata;
126 struct soc_camera_host ici;
127 struct list_head capture;
128 #define MAX_BUFFER_NUM 3
129 struct vb2_buffer *queue_buf[MAX_BUFFER_NUM];
130 struct vb2_alloc_ctx *alloc_ctx;
131 enum v4l2_field field;
132 unsigned int vb_count;
133 unsigned int nr_hw_slots;
134 bool request_to_stop;
135 struct completion capture_stop;
136 enum chip_id chip;
137 };
138
139 #define is_continuous_transfer(priv) (priv->vb_count > MAX_BUFFER_NUM)
140
141 struct rcar_vin_buffer {
142 struct vb2_buffer vb;
143 struct list_head list;
144 };
145
146 #define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \
147 struct rcar_vin_buffer, \
148 vb)->list)
149
150 struct rcar_vin_cam {
151 /* VIN offsets within the camera output, before the VIN scaler */
152 unsigned int vin_left;
153 unsigned int vin_top;
154 /* Client output, as seen by the VIN */
155 unsigned int width;
156 unsigned int height;
157 /*
158 * User window from S_CROP / G_CROP, produced by client cropping and
159 * scaling, VIN scaling and VIN cropping, mapped back onto the client
160 * input window
161 */
162 struct v4l2_rect subrect;
163 /* Camera cropping rectangle */
164 struct v4l2_rect rect;
165 const struct soc_mbus_pixelfmt *extra_fmt;
166 };
167
168 /*
169 * .queue_setup() is called to check whether the driver can accept the requested
170 * number of buffers and to fill in plane sizes for the current frame format if
171 * required
172 */
173 static int rcar_vin_videobuf_setup(struct vb2_queue *vq,
174 const struct v4l2_format *fmt,
175 unsigned int *count,
176 unsigned int *num_planes,
177 unsigned int sizes[], void *alloc_ctxs[])
178 {
179 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
180 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
181 struct rcar_vin_priv *priv = ici->priv;
182
183 if (fmt) {
184 const struct soc_camera_format_xlate *xlate;
185 unsigned int bytes_per_line;
186 int ret;
187
188 xlate = soc_camera_xlate_by_fourcc(icd,
189 fmt->fmt.pix.pixelformat);
190 if (!xlate)
191 return -EINVAL;
192 ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
193 xlate->host_fmt);
194 if (ret < 0)
195 return ret;
196
197 bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
198
199 ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
200 fmt->fmt.pix.height);
201 if (ret < 0)
202 return ret;
203
204 sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
205 } else {
206 /* Called from VIDIOC_REQBUFS or in compatibility mode */
207 sizes[0] = icd->sizeimage;
208 }
209
210 alloc_ctxs[0] = priv->alloc_ctx;
211
212 if (!vq->num_buffers)
213 priv->sequence = 0;
214
215 if (!*count)
216 *count = 2;
217 priv->vb_count = *count;
218
219 *num_planes = 1;
220
221 /* Number of hardware slots */
222 if (is_continuous_transfer(priv))
223 priv->nr_hw_slots = MAX_BUFFER_NUM;
224 else
225 priv->nr_hw_slots = 1;
226
227 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
228
229 return 0;
230 }
231
232 static int rcar_vin_setup(struct rcar_vin_priv *priv)
233 {
234 struct soc_camera_device *icd = priv->ici.icd;
235 struct rcar_vin_cam *cam = icd->host_priv;
236 u32 vnmc, dmr, interrupts;
237 bool progressive = false, output_is_yuv = false;
238
239 switch (priv->field) {
240 case V4L2_FIELD_TOP:
241 vnmc = VNMC_IM_ODD;
242 break;
243 case V4L2_FIELD_BOTTOM:
244 vnmc = VNMC_IM_EVEN;
245 break;
246 case V4L2_FIELD_INTERLACED:
247 case V4L2_FIELD_INTERLACED_TB:
248 vnmc = VNMC_IM_FULL;
249 break;
250 case V4L2_FIELD_INTERLACED_BT:
251 vnmc = VNMC_IM_FULL | VNMC_FOC;
252 break;
253 case V4L2_FIELD_NONE:
254 if (is_continuous_transfer(priv)) {
255 vnmc = VNMC_IM_ODD_EVEN;
256 progressive = true;
257 } else {
258 vnmc = VNMC_IM_ODD;
259 }
260 break;
261 default:
262 vnmc = VNMC_IM_ODD;
263 break;
264 }
265
266 /* input interface */
267 switch (icd->current_fmt->code) {
268 case V4L2_MBUS_FMT_YUYV8_1X16:
269 /* BT.601/BT.1358 16bit YCbCr422 */
270 vnmc |= VNMC_INF_YUV16;
271 break;
272 case V4L2_MBUS_FMT_YUYV8_2X8:
273 /* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */
274 vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ?
275 VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601;
276 default:
277 break;
278 }
279
280 /* output format */
281 switch (icd->current_fmt->host_fmt->fourcc) {
282 case V4L2_PIX_FMT_NV16:
283 iowrite32(ALIGN(cam->width * cam->height, 0x80),
284 priv->base + VNUVAOF_REG);
285 dmr = VNDMR_DTMD_YCSEP;
286 output_is_yuv = true;
287 break;
288 case V4L2_PIX_FMT_YUYV:
289 dmr = VNDMR_BPSM;
290 output_is_yuv = true;
291 break;
292 case V4L2_PIX_FMT_UYVY:
293 dmr = 0;
294 output_is_yuv = true;
295 break;
296 case V4L2_PIX_FMT_RGB555X:
297 dmr = VNDMR_DTMD_ARGB1555;
298 break;
299 case V4L2_PIX_FMT_RGB565:
300 dmr = 0;
301 break;
302 case V4L2_PIX_FMT_RGB32:
303 if (priv->chip == RCAR_H1 || priv->chip == RCAR_E1) {
304 dmr = VNDMR_EXRGB;
305 break;
306 }
307 default:
308 dev_warn(icd->parent, "Invalid fourcc format (0x%x)\n",
309 icd->current_fmt->host_fmt->fourcc);
310 return -EINVAL;
311 }
312
313 /* Always update on field change */
314 vnmc |= VNMC_VUP;
315
316 /* If input and output use the same colorspace, use bypass mode */
317 if (output_is_yuv)
318 vnmc |= VNMC_BPS;
319
320 /* progressive or interlaced mode */
321 interrupts = progressive ? VNIE_FIE | VNIE_EFE : VNIE_EFE;
322
323 /* ack interrupts */
324 iowrite32(interrupts, priv->base + VNINTS_REG);
325 /* enable interrupts */
326 iowrite32(interrupts, priv->base + VNIE_REG);
327 /* start capturing */
328 iowrite32(dmr, priv->base + VNDMR_REG);
329 iowrite32(vnmc | VNMC_ME, priv->base + VNMC_REG);
330
331 return 0;
332 }
333
334 static void rcar_vin_capture(struct rcar_vin_priv *priv)
335 {
336 if (is_continuous_transfer(priv))
337 /* Continuous Frame Capture Mode */
338 iowrite32(VNFC_C_FRAME, priv->base + VNFC_REG);
339 else
340 /* Single Frame Capture Mode */
341 iowrite32(VNFC_S_FRAME, priv->base + VNFC_REG);
342 }
343
344 static void rcar_vin_request_capture_stop(struct rcar_vin_priv *priv)
345 {
346 priv->state = STOPPING;
347
348 /* set continuous & single transfer off */
349 iowrite32(0, priv->base + VNFC_REG);
350 /* disable capture (release DMA buffer), reset */
351 iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
352 priv->base + VNMC_REG);
353
354 /* update the status if stopped already */
355 if (!(ioread32(priv->base + VNMS_REG) & VNMS_CA))
356 priv->state = STOPPED;
357 }
358
359 static int rcar_vin_get_free_hw_slot(struct rcar_vin_priv *priv)
360 {
361 int slot;
362
363 for (slot = 0; slot < priv->nr_hw_slots; slot++)
364 if (priv->queue_buf[slot] == NULL)
365 return slot;
366
367 return -1;
368 }
369
370 static int rcar_vin_hw_ready(struct rcar_vin_priv *priv)
371 {
372 /* Ensure all HW slots are filled */
373 return rcar_vin_get_free_hw_slot(priv) < 0 ? 1 : 0;
374 }
375
376 /* Moves a buffer from the queue to the HW slots */
377 static int rcar_vin_fill_hw_slot(struct rcar_vin_priv *priv)
378 {
379 struct vb2_buffer *vb;
380 dma_addr_t phys_addr_top;
381 int slot;
382
383 if (list_empty(&priv->capture))
384 return 0;
385
386 /* Find a free HW slot */
387 slot = rcar_vin_get_free_hw_slot(priv);
388 if (slot < 0)
389 return 0;
390
391 vb = &list_entry(priv->capture.next, struct rcar_vin_buffer, list)->vb;
392 list_del_init(to_buf_list(vb));
393 priv->queue_buf[slot] = vb;
394 phys_addr_top = vb2_dma_contig_plane_dma_addr(vb, 0);
395 iowrite32(phys_addr_top, priv->base + VNMB_REG(slot));
396
397 return 1;
398 }
399
400 static void rcar_vin_videobuf_queue(struct vb2_buffer *vb)
401 {
402 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
403 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
404 struct rcar_vin_priv *priv = ici->priv;
405 unsigned long size;
406
407 size = icd->sizeimage;
408
409 if (vb2_plane_size(vb, 0) < size) {
410 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
411 vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
412 goto error;
413 }
414
415 vb2_set_plane_payload(vb, 0, size);
416
417 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
418 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
419
420 spin_lock_irq(&priv->lock);
421
422 list_add_tail(to_buf_list(vb), &priv->capture);
423 rcar_vin_fill_hw_slot(priv);
424
425 /* If we weren't running, and have enough buffers, start capturing! */
426 if (priv->state != RUNNING && rcar_vin_hw_ready(priv)) {
427 if (rcar_vin_setup(priv)) {
428 /* Submit error */
429 list_del_init(to_buf_list(vb));
430 spin_unlock_irq(&priv->lock);
431 goto error;
432 }
433 priv->request_to_stop = false;
434 init_completion(&priv->capture_stop);
435 priv->state = RUNNING;
436 rcar_vin_capture(priv);
437 }
438
439 spin_unlock_irq(&priv->lock);
440
441 return;
442
443 error:
444 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
445 }
446
447 static void rcar_vin_videobuf_release(struct vb2_buffer *vb)
448 {
449 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
450 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
451 struct rcar_vin_priv *priv = ici->priv;
452 unsigned int i;
453 int buf_in_use = 0;
454
455 spin_lock_irq(&priv->lock);
456
457 /* Is the buffer in use by the VIN hardware? */
458 for (i = 0; i < MAX_BUFFER_NUM; i++) {
459 if (priv->queue_buf[i] == vb) {
460 buf_in_use = 1;
461 break;
462 }
463 }
464
465 if (buf_in_use) {
466 while (priv->state != STOPPED) {
467
468 /* issue stop if running */
469 if (priv->state == RUNNING)
470 rcar_vin_request_capture_stop(priv);
471
472 /* wait until capturing has been stopped */
473 if (priv->state == STOPPING) {
474 priv->request_to_stop = true;
475 spin_unlock_irq(&priv->lock);
476 wait_for_completion(&priv->capture_stop);
477 spin_lock_irq(&priv->lock);
478 }
479 }
480 /*
481 * Capturing has now stopped. The buffer we have been asked
482 * to release could be any of the current buffers in use, so
483 * release all buffers that are in use by HW
484 */
485 for (i = 0; i < MAX_BUFFER_NUM; i++) {
486 if (priv->queue_buf[i]) {
487 vb2_buffer_done(priv->queue_buf[i],
488 VB2_BUF_STATE_ERROR);
489 priv->queue_buf[i] = NULL;
490 }
491 }
492 } else {
493 list_del_init(to_buf_list(vb));
494 }
495
496 spin_unlock_irq(&priv->lock);
497 }
498
499 static int rcar_vin_videobuf_init(struct vb2_buffer *vb)
500 {
501 INIT_LIST_HEAD(to_buf_list(vb));
502 return 0;
503 }
504
505 static int rcar_vin_stop_streaming(struct vb2_queue *vq)
506 {
507 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
508 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
509 struct rcar_vin_priv *priv = ici->priv;
510 struct list_head *buf_head, *tmp;
511
512 spin_lock_irq(&priv->lock);
513 list_for_each_safe(buf_head, tmp, &priv->capture)
514 list_del_init(buf_head);
515 spin_unlock_irq(&priv->lock);
516
517 return 0;
518 }
519
520 static struct vb2_ops rcar_vin_vb2_ops = {
521 .queue_setup = rcar_vin_videobuf_setup,
522 .buf_init = rcar_vin_videobuf_init,
523 .buf_cleanup = rcar_vin_videobuf_release,
524 .buf_queue = rcar_vin_videobuf_queue,
525 .stop_streaming = rcar_vin_stop_streaming,
526 .wait_prepare = soc_camera_unlock,
527 .wait_finish = soc_camera_lock,
528 };
529
530 static irqreturn_t rcar_vin_irq(int irq, void *data)
531 {
532 struct rcar_vin_priv *priv = data;
533 u32 int_status;
534 bool can_run = false, hw_stopped;
535 int slot;
536 unsigned int handled = 0;
537
538 spin_lock(&priv->lock);
539
540 int_status = ioread32(priv->base + VNINTS_REG);
541 if (!int_status)
542 goto done;
543 /* ack interrupts */
544 iowrite32(int_status, priv->base + VNINTS_REG);
545 handled = 1;
546
547 /* nothing to do if capture status is 'STOPPED' */
548 if (priv->state == STOPPED)
549 goto done;
550
551 hw_stopped = !(ioread32(priv->base + VNMS_REG) & VNMS_CA);
552
553 if (!priv->request_to_stop) {
554 if (is_continuous_transfer(priv))
555 slot = (ioread32(priv->base + VNMS_REG) &
556 VNMS_FBS_MASK) >> VNMS_FBS_SHIFT;
557 else
558 slot = 0;
559
560 priv->queue_buf[slot]->v4l2_buf.field = priv->field;
561 priv->queue_buf[slot]->v4l2_buf.sequence = priv->sequence++;
562 do_gettimeofday(&priv->queue_buf[slot]->v4l2_buf.timestamp);
563 vb2_buffer_done(priv->queue_buf[slot], VB2_BUF_STATE_DONE);
564 priv->queue_buf[slot] = NULL;
565
566 if (priv->state != STOPPING)
567 can_run = rcar_vin_fill_hw_slot(priv);
568
569 if (hw_stopped || !can_run) {
570 priv->state = STOPPED;
571 } else if (is_continuous_transfer(priv) &&
572 list_empty(&priv->capture) &&
573 priv->state == RUNNING) {
574 /*
575 * The continuous capturing requires an explicit stop
576 * operation when there is no buffer to be set into
577 * the VnMBm registers.
578 */
579 rcar_vin_request_capture_stop(priv);
580 } else {
581 rcar_vin_capture(priv);
582 }
583
584 } else if (hw_stopped) {
585 priv->state = STOPPED;
586 priv->request_to_stop = false;
587 complete(&priv->capture_stop);
588 }
589
590 done:
591 spin_unlock(&priv->lock);
592
593 return IRQ_RETVAL(handled);
594 }
595
596 static int rcar_vin_add_device(struct soc_camera_device *icd)
597 {
598 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
599 struct rcar_vin_priv *priv = ici->priv;
600 int i;
601
602 for (i = 0; i < MAX_BUFFER_NUM; i++)
603 priv->queue_buf[i] = NULL;
604
605 pm_runtime_get_sync(ici->v4l2_dev.dev);
606
607 dev_dbg(icd->parent, "R-Car VIN driver attached to camera %d\n",
608 icd->devnum);
609
610 return 0;
611 }
612
613 static void rcar_vin_remove_device(struct soc_camera_device *icd)
614 {
615 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
616 struct rcar_vin_priv *priv = ici->priv;
617 struct vb2_buffer *vb;
618 int i;
619
620 /* disable capture, disable interrupts */
621 iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
622 priv->base + VNMC_REG);
623 iowrite32(0, priv->base + VNIE_REG);
624
625 priv->state = STOPPED;
626 priv->request_to_stop = false;
627
628 /* make sure active buffer is cancelled */
629 spin_lock_irq(&priv->lock);
630 for (i = 0; i < MAX_BUFFER_NUM; i++) {
631 vb = priv->queue_buf[i];
632 if (vb) {
633 list_del_init(to_buf_list(vb));
634 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
635 }
636 }
637 spin_unlock_irq(&priv->lock);
638
639 pm_runtime_put(ici->v4l2_dev.dev);
640
641 dev_dbg(icd->parent, "R-Car VIN driver detached from camera %d\n",
642 icd->devnum);
643 }
644
645 /* Called with .host_lock held */
646 static int rcar_vin_clock_start(struct soc_camera_host *ici)
647 {
648 /* VIN does not have "mclk" */
649 return 0;
650 }
651
652 /* Called with .host_lock held */
653 static void rcar_vin_clock_stop(struct soc_camera_host *ici)
654 {
655 /* VIN does not have "mclk" */
656 }
657
658 /* rect is guaranteed to not exceed the scaled camera rectangle */
659 static int rcar_vin_set_rect(struct soc_camera_device *icd)
660 {
661 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
662 struct rcar_vin_cam *cam = icd->host_priv;
663 struct rcar_vin_priv *priv = ici->priv;
664 unsigned int left_offset, top_offset;
665 unsigned char dsize = 0;
666 struct v4l2_rect *cam_subrect = &cam->subrect;
667
668 dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n",
669 icd->user_width, icd->user_height, cam->vin_left, cam->vin_top);
670
671 left_offset = cam->vin_left;
672 top_offset = cam->vin_top;
673
674 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_RGB32 &&
675 priv->chip == RCAR_E1)
676 dsize = 1;
677
678 dev_dbg(icd->parent, "Cam %ux%u@%u:%u\n",
679 cam->width, cam->height, cam->vin_left, cam->vin_top);
680 dev_dbg(icd->parent, "Cam subrect %ux%u@%u:%u\n",
681 cam_subrect->width, cam_subrect->height,
682 cam_subrect->left, cam_subrect->top);
683
684 /* Set Start/End Pixel/Line Pre-Clip */
685 iowrite32(left_offset << dsize, priv->base + VNSPPRC_REG);
686 iowrite32((left_offset + cam->width - 1) << dsize,
687 priv->base + VNEPPRC_REG);
688 switch (priv->field) {
689 case V4L2_FIELD_INTERLACED:
690 case V4L2_FIELD_INTERLACED_TB:
691 case V4L2_FIELD_INTERLACED_BT:
692 iowrite32(top_offset / 2, priv->base + VNSLPRC_REG);
693 iowrite32((top_offset + cam->height) / 2 - 1,
694 priv->base + VNELPRC_REG);
695 break;
696 default:
697 iowrite32(top_offset, priv->base + VNSLPRC_REG);
698 iowrite32(top_offset + cam->height - 1,
699 priv->base + VNELPRC_REG);
700 break;
701 }
702
703 /* Set Start/End Pixel/Line Post-Clip */
704 iowrite32(0, priv->base + VNSPPOC_REG);
705 iowrite32(0, priv->base + VNSLPOC_REG);
706 iowrite32((cam_subrect->width - 1) << dsize, priv->base + VNEPPOC_REG);
707 switch (priv->field) {
708 case V4L2_FIELD_INTERLACED:
709 case V4L2_FIELD_INTERLACED_TB:
710 case V4L2_FIELD_INTERLACED_BT:
711 iowrite32(cam_subrect->height / 2 - 1,
712 priv->base + VNELPOC_REG);
713 break;
714 default:
715 iowrite32(cam_subrect->height - 1, priv->base + VNELPOC_REG);
716 break;
717 }
718
719 iowrite32(ALIGN(cam->width, 0x10), priv->base + VNIS_REG);
720
721 return 0;
722 }
723
724 static void capture_stop_preserve(struct rcar_vin_priv *priv, u32 *vnmc)
725 {
726 *vnmc = ioread32(priv->base + VNMC_REG);
727 /* module disable */
728 iowrite32(*vnmc & ~VNMC_ME, priv->base + VNMC_REG);
729 }
730
731 static void capture_restore(struct rcar_vin_priv *priv, u32 vnmc)
732 {
733 unsigned long timeout = jiffies + 10 * HZ;
734
735 /*
736 * Wait until the end of the current frame. It can take a long time,
737 * but if it has been aborted by a MRST1 reset, it should exit sooner.
738 */
739 while ((ioread32(priv->base + VNMS_REG) & VNMS_AV) &&
740 time_before(jiffies, timeout))
741 msleep(1);
742
743 if (time_after(jiffies, timeout)) {
744 dev_err(priv->ici.v4l2_dev.dev,
745 "Timeout waiting for frame end! Interface problem?\n");
746 return;
747 }
748
749 iowrite32(vnmc, priv->base + VNMC_REG);
750 }
751
752 #define VIN_MBUS_FLAGS (V4L2_MBUS_MASTER | \
753 V4L2_MBUS_PCLK_SAMPLE_RISING | \
754 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
755 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
756 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
757 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
758 V4L2_MBUS_DATA_ACTIVE_HIGH)
759
760 static int rcar_vin_set_bus_param(struct soc_camera_device *icd)
761 {
762 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
763 struct rcar_vin_priv *priv = ici->priv;
764 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
765 struct v4l2_mbus_config cfg;
766 unsigned long common_flags;
767 u32 vnmc;
768 u32 val;
769 int ret;
770
771 capture_stop_preserve(priv, &vnmc);
772
773 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
774 if (!ret) {
775 common_flags = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
776 if (!common_flags) {
777 dev_warn(icd->parent,
778 "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
779 cfg.flags, VIN_MBUS_FLAGS);
780 return -EINVAL;
781 }
782 } else if (ret != -ENOIOCTLCMD) {
783 return ret;
784 } else {
785 common_flags = VIN_MBUS_FLAGS;
786 }
787
788 /* Make choises, based on platform preferences */
789 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
790 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
791 if (priv->pdata->flags & RCAR_VIN_HSYNC_ACTIVE_LOW)
792 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
793 else
794 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
795 }
796
797 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
798 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
799 if (priv->pdata->flags & RCAR_VIN_VSYNC_ACTIVE_LOW)
800 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
801 else
802 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
803 }
804
805 cfg.flags = common_flags;
806 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
807 if (ret < 0 && ret != -ENOIOCTLCMD)
808 return ret;
809
810 val = priv->field == V4L2_FIELD_NONE ? VNDMR2_FTEV : 0;
811 if (!(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
812 val |= VNDMR2_VPS;
813 if (!(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW))
814 val |= VNDMR2_HPS;
815 iowrite32(val, priv->base + VNDMR2_REG);
816
817 ret = rcar_vin_set_rect(icd);
818 if (ret < 0)
819 return ret;
820
821 capture_restore(priv, vnmc);
822
823 return 0;
824 }
825
826 static int rcar_vin_try_bus_param(struct soc_camera_device *icd,
827 unsigned char buswidth)
828 {
829 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
830 struct v4l2_mbus_config cfg;
831 int ret;
832
833 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
834 if (ret == -ENOIOCTLCMD)
835 return 0;
836 else if (ret)
837 return ret;
838
839 if (buswidth > 24)
840 return -EINVAL;
841
842 /* check is there common mbus flags */
843 ret = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
844 if (ret)
845 return 0;
846
847 dev_warn(icd->parent,
848 "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
849 cfg.flags, VIN_MBUS_FLAGS);
850
851 return -EINVAL;
852 }
853
854 static bool rcar_vin_packing_supported(const struct soc_mbus_pixelfmt *fmt)
855 {
856 return fmt->packing == SOC_MBUS_PACKING_NONE ||
857 (fmt->bits_per_sample > 8 &&
858 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
859 }
860
861 static const struct soc_mbus_pixelfmt rcar_vin_formats[] = {
862 {
863 .fourcc = V4L2_PIX_FMT_NV16,
864 .name = "NV16",
865 .bits_per_sample = 8,
866 .packing = SOC_MBUS_PACKING_2X8_PADHI,
867 .order = SOC_MBUS_ORDER_LE,
868 .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
869 },
870 {
871 .fourcc = V4L2_PIX_FMT_UYVY,
872 .name = "UYVY",
873 .bits_per_sample = 16,
874 .packing = SOC_MBUS_PACKING_NONE,
875 .order = SOC_MBUS_ORDER_LE,
876 .layout = SOC_MBUS_LAYOUT_PACKED,
877 },
878 {
879 .fourcc = V4L2_PIX_FMT_RGB565,
880 .name = "RGB565",
881 .bits_per_sample = 16,
882 .packing = SOC_MBUS_PACKING_NONE,
883 .order = SOC_MBUS_ORDER_LE,
884 .layout = SOC_MBUS_LAYOUT_PACKED,
885 },
886 {
887 .fourcc = V4L2_PIX_FMT_RGB555X,
888 .name = "ARGB1555",
889 .bits_per_sample = 16,
890 .packing = SOC_MBUS_PACKING_NONE,
891 .order = SOC_MBUS_ORDER_LE,
892 .layout = SOC_MBUS_LAYOUT_PACKED,
893 },
894 {
895 .fourcc = V4L2_PIX_FMT_RGB32,
896 .name = "RGB888",
897 .bits_per_sample = 32,
898 .packing = SOC_MBUS_PACKING_NONE,
899 .order = SOC_MBUS_ORDER_LE,
900 .layout = SOC_MBUS_LAYOUT_PACKED,
901 },
902 };
903
904 static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
905 struct soc_camera_format_xlate *xlate)
906 {
907 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
908 struct device *dev = icd->parent;
909 int ret, k, n;
910 int formats = 0;
911 struct rcar_vin_cam *cam;
912 enum v4l2_mbus_pixelcode code;
913 const struct soc_mbus_pixelfmt *fmt;
914
915 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
916 if (ret < 0)
917 return 0;
918
919 fmt = soc_mbus_get_fmtdesc(code);
920 if (!fmt) {
921 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
922 return 0;
923 }
924
925 ret = rcar_vin_try_bus_param(icd, fmt->bits_per_sample);
926 if (ret < 0)
927 return 0;
928
929 if (!icd->host_priv) {
930 struct v4l2_mbus_framefmt mf;
931 struct v4l2_rect rect;
932 struct device *dev = icd->parent;
933 int shift;
934
935 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
936 if (ret < 0)
937 return ret;
938
939 /* Cache current client geometry */
940 ret = soc_camera_client_g_rect(sd, &rect);
941 if (ret == -ENOIOCTLCMD) {
942 /* Sensor driver doesn't support cropping */
943 rect.left = 0;
944 rect.top = 0;
945 rect.width = mf.width;
946 rect.height = mf.height;
947 } else if (ret < 0) {
948 return ret;
949 }
950
951 /*
952 * If sensor proposes too large format then try smaller ones:
953 * 1280x960, 640x480, 320x240
954 */
955 for (shift = 0; shift < 3; shift++) {
956 if (mf.width <= VIN_MAX_WIDTH &&
957 mf.height <= VIN_MAX_HEIGHT)
958 break;
959
960 mf.width = 1280 >> shift;
961 mf.height = 960 >> shift;
962 ret = v4l2_device_call_until_err(sd->v4l2_dev,
963 soc_camera_grp_id(icd),
964 video, s_mbus_fmt,
965 &mf);
966 if (ret < 0)
967 return ret;
968 }
969
970 if (shift == 3) {
971 dev_err(dev,
972 "Failed to configure the client below %ux%x\n",
973 mf.width, mf.height);
974 return -EIO;
975 }
976
977 dev_dbg(dev, "camera fmt %ux%u\n", mf.width, mf.height);
978
979 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
980 if (!cam)
981 return -ENOMEM;
982 /*
983 * We are called with current camera crop,
984 * initialise subrect with it
985 */
986 cam->rect = rect;
987 cam->subrect = rect;
988 cam->width = mf.width;
989 cam->height = mf.height;
990
991 icd->host_priv = cam;
992 } else {
993 cam = icd->host_priv;
994 }
995
996 /* Beginning of a pass */
997 if (!idx)
998 cam->extra_fmt = NULL;
999
1000 switch (code) {
1001 case V4L2_MBUS_FMT_YUYV8_1X16:
1002 case V4L2_MBUS_FMT_YUYV8_2X8:
1003 if (cam->extra_fmt)
1004 break;
1005
1006 /* Add all our formats that can be generated by VIN */
1007 cam->extra_fmt = rcar_vin_formats;
1008
1009 n = ARRAY_SIZE(rcar_vin_formats);
1010 formats += n;
1011 for (k = 0; xlate && k < n; k++, xlate++) {
1012 xlate->host_fmt = &rcar_vin_formats[k];
1013 xlate->code = code;
1014 dev_dbg(dev, "Providing format %s using code %d\n",
1015 rcar_vin_formats[k].name, code);
1016 }
1017 break;
1018 default:
1019 if (!rcar_vin_packing_supported(fmt))
1020 return 0;
1021
1022 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1023 fmt->name);
1024 break;
1025 }
1026
1027 /* Generic pass-through */
1028 formats++;
1029 if (xlate) {
1030 xlate->host_fmt = fmt;
1031 xlate->code = code;
1032 xlate++;
1033 }
1034
1035 return formats;
1036 }
1037
1038 static void rcar_vin_put_formats(struct soc_camera_device *icd)
1039 {
1040 kfree(icd->host_priv);
1041 icd->host_priv = NULL;
1042 }
1043
1044 static int rcar_vin_set_crop(struct soc_camera_device *icd,
1045 const struct v4l2_crop *a)
1046 {
1047 struct v4l2_crop a_writable = *a;
1048 const struct v4l2_rect *rect = &a_writable.c;
1049 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1050 struct rcar_vin_priv *priv = ici->priv;
1051 struct v4l2_crop cam_crop;
1052 struct rcar_vin_cam *cam = icd->host_priv;
1053 struct v4l2_rect *cam_rect = &cam_crop.c;
1054 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1055 struct device *dev = icd->parent;
1056 struct v4l2_mbus_framefmt mf;
1057 u32 vnmc;
1058 int ret, i;
1059
1060 dev_dbg(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1061 rect->left, rect->top);
1062
1063 /* During camera cropping its output window can change too, stop VIN */
1064 capture_stop_preserve(priv, &vnmc);
1065 dev_dbg(dev, "VNMC_REG 0x%x\n", vnmc);
1066
1067 /* Apply iterative camera S_CROP for new input window. */
1068 ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
1069 &cam->rect, &cam->subrect);
1070 if (ret < 0)
1071 return ret;
1072
1073 dev_dbg(dev, "camera cropped to %ux%u@%u:%u\n",
1074 cam_rect->width, cam_rect->height,
1075 cam_rect->left, cam_rect->top);
1076
1077 /* On success cam_crop contains current camera crop */
1078
1079 /* Retrieve camera output window */
1080 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1081 if (ret < 0)
1082 return ret;
1083
1084 if (mf.width > VIN_MAX_WIDTH || mf.height > VIN_MAX_HEIGHT)
1085 return -EINVAL;
1086
1087 /* Cache camera output window */
1088 cam->width = mf.width;
1089 cam->height = mf.height;
1090
1091 icd->user_width = cam->width;
1092 icd->user_height = cam->height;
1093
1094 cam->vin_left = rect->left & ~1;
1095 cam->vin_top = rect->top & ~1;
1096
1097 /* Use VIN cropping to crop to the new window. */
1098 ret = rcar_vin_set_rect(icd);
1099 if (ret < 0)
1100 return ret;
1101
1102 cam->subrect = *rect;
1103
1104 dev_dbg(dev, "VIN cropped to %ux%u@%u:%u\n",
1105 icd->user_width, icd->user_height,
1106 cam->vin_left, cam->vin_top);
1107
1108 /* Restore capture */
1109 for (i = 0; i < MAX_BUFFER_NUM; i++) {
1110 if (priv->queue_buf[i] && priv->state == STOPPED) {
1111 vnmc |= VNMC_ME;
1112 break;
1113 }
1114 }
1115 capture_restore(priv, vnmc);
1116
1117 /* Even if only camera cropping succeeded */
1118 return ret;
1119 }
1120
1121 static int rcar_vin_get_crop(struct soc_camera_device *icd,
1122 struct v4l2_crop *a)
1123 {
1124 struct rcar_vin_cam *cam = icd->host_priv;
1125
1126 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1127 a->c = cam->subrect;
1128
1129 return 0;
1130 }
1131
1132 /* Similar to set_crop multistage iterative algorithm */
1133 static int rcar_vin_set_fmt(struct soc_camera_device *icd,
1134 struct v4l2_format *f)
1135 {
1136 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1137 struct rcar_vin_priv *priv = ici->priv;
1138 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1139 struct rcar_vin_cam *cam = icd->host_priv;
1140 struct v4l2_pix_format *pix = &f->fmt.pix;
1141 struct v4l2_mbus_framefmt mf;
1142 struct device *dev = icd->parent;
1143 __u32 pixfmt = pix->pixelformat;
1144 const struct soc_camera_format_xlate *xlate;
1145 unsigned int vin_sub_width = 0, vin_sub_height = 0;
1146 int ret;
1147 bool can_scale;
1148 enum v4l2_field field;
1149 v4l2_std_id std;
1150
1151 dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n",
1152 pixfmt, pix->width, pix->height);
1153
1154 switch (pix->field) {
1155 default:
1156 pix->field = V4L2_FIELD_NONE;
1157 /* fall-through */
1158 case V4L2_FIELD_NONE:
1159 case V4L2_FIELD_TOP:
1160 case V4L2_FIELD_BOTTOM:
1161 case V4L2_FIELD_INTERLACED_TB:
1162 case V4L2_FIELD_INTERLACED_BT:
1163 field = pix->field;
1164 break;
1165 case V4L2_FIELD_INTERLACED:
1166 /* Query for standard if not explicitly mentioned _TB/_BT */
1167 ret = v4l2_subdev_call(sd, video, querystd, &std);
1168 if (ret < 0)
1169 std = V4L2_STD_625_50;
1170
1171 field = std & V4L2_STD_625_50 ? V4L2_FIELD_INTERLACED_TB :
1172 V4L2_FIELD_INTERLACED_BT;
1173 break;
1174 }
1175
1176 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1177 if (!xlate) {
1178 dev_warn(dev, "Format %x not found\n", pixfmt);
1179 return -EINVAL;
1180 }
1181 /* Calculate client output geometry */
1182 soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf,
1183 12);
1184 mf.field = pix->field;
1185 mf.colorspace = pix->colorspace;
1186 mf.code = xlate->code;
1187
1188 switch (pixfmt) {
1189 case V4L2_PIX_FMT_RGB32:
1190 can_scale = priv->chip != RCAR_E1;
1191 break;
1192 case V4L2_PIX_FMT_UYVY:
1193 case V4L2_PIX_FMT_YUYV:
1194 case V4L2_PIX_FMT_RGB565:
1195 case V4L2_PIX_FMT_RGB555X:
1196 can_scale = true;
1197 break;
1198 default:
1199 can_scale = false;
1200 break;
1201 }
1202
1203 dev_dbg(dev, "request camera output %ux%u\n", mf.width, mf.height);
1204
1205 ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1206 &mf, &vin_sub_width, &vin_sub_height,
1207 can_scale, 12);
1208
1209 /* Done with the camera. Now see if we can improve the result */
1210 dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
1211 ret, mf.width, mf.height, pix->width, pix->height);
1212
1213 if (ret == -ENOIOCTLCMD)
1214 dev_dbg(dev, "Sensor doesn't support scaling\n");
1215 else if (ret < 0)
1216 return ret;
1217
1218 if (mf.code != xlate->code)
1219 return -EINVAL;
1220
1221 /* Prepare VIN crop */
1222 cam->width = mf.width;
1223 cam->height = mf.height;
1224
1225 /* Use VIN scaling to scale to the requested user window. */
1226
1227 /* We cannot scale up */
1228 if (pix->width > vin_sub_width)
1229 vin_sub_width = pix->width;
1230
1231 if (pix->height > vin_sub_height)
1232 vin_sub_height = pix->height;
1233
1234 pix->colorspace = mf.colorspace;
1235
1236 if (!can_scale) {
1237 pix->width = vin_sub_width;
1238 pix->height = vin_sub_height;
1239 }
1240
1241 /*
1242 * We have calculated CFLCR, the actual configuration will be performed
1243 * in rcar_vin_set_bus_param()
1244 */
1245
1246 dev_dbg(dev, "W: %u : %u, H: %u : %u\n",
1247 vin_sub_width, pix->width, vin_sub_height, pix->height);
1248
1249 icd->current_fmt = xlate;
1250
1251 priv->field = field;
1252
1253 return 0;
1254 }
1255
1256 static int rcar_vin_try_fmt(struct soc_camera_device *icd,
1257 struct v4l2_format *f)
1258 {
1259 const struct soc_camera_format_xlate *xlate;
1260 struct v4l2_pix_format *pix = &f->fmt.pix;
1261 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1262 struct v4l2_mbus_framefmt mf;
1263 __u32 pixfmt = pix->pixelformat;
1264 int width, height;
1265 int ret;
1266
1267 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1268 if (!xlate) {
1269 xlate = icd->current_fmt;
1270 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1271 pixfmt, xlate->host_fmt->fourcc);
1272 pixfmt = xlate->host_fmt->fourcc;
1273 pix->pixelformat = pixfmt;
1274 pix->colorspace = icd->colorspace;
1275 }
1276
1277 /* FIXME: calculate using depth and bus width */
1278 v4l_bound_align_image(&pix->width, 2, VIN_MAX_WIDTH, 1,
1279 &pix->height, 4, VIN_MAX_HEIGHT, 2, 0);
1280
1281 width = pix->width;
1282 height = pix->height;
1283
1284 /* let soc-camera calculate these values */
1285 pix->bytesperline = 0;
1286 pix->sizeimage = 0;
1287
1288 /* limit to sensor capabilities */
1289 mf.width = pix->width;
1290 mf.height = pix->height;
1291 mf.field = pix->field;
1292 mf.code = xlate->code;
1293 mf.colorspace = pix->colorspace;
1294
1295 ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1296 video, try_mbus_fmt, &mf);
1297 if (ret < 0)
1298 return ret;
1299
1300 pix->width = mf.width;
1301 pix->height = mf.height;
1302 pix->field = mf.field;
1303 pix->colorspace = mf.colorspace;
1304
1305 if (pixfmt == V4L2_PIX_FMT_NV16) {
1306 /* FIXME: check against rect_max after converting soc-camera */
1307 /* We can scale precisely, need a bigger image from camera */
1308 if (pix->width < width || pix->height < height) {
1309 /*
1310 * We presume, the sensor behaves sanely, i.e. if
1311 * requested a bigger rectangle, it will not return a
1312 * smaller one.
1313 */
1314 mf.width = VIN_MAX_WIDTH;
1315 mf.height = VIN_MAX_HEIGHT;
1316 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1317 soc_camera_grp_id(icd),
1318 video, try_mbus_fmt,
1319 &mf);
1320 if (ret < 0) {
1321 dev_err(icd->parent,
1322 "client try_fmt() = %d\n", ret);
1323 return ret;
1324 }
1325 }
1326 /* We will scale exactly */
1327 if (mf.width > width)
1328 pix->width = width;
1329 if (mf.height > height)
1330 pix->height = height;
1331 }
1332
1333 return ret;
1334 }
1335
1336 static unsigned int rcar_vin_poll(struct file *file, poll_table *pt)
1337 {
1338 struct soc_camera_device *icd = file->private_data;
1339
1340 return vb2_poll(&icd->vb2_vidq, file, pt);
1341 }
1342
1343 static int rcar_vin_querycap(struct soc_camera_host *ici,
1344 struct v4l2_capability *cap)
1345 {
1346 strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card));
1347 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1348 return 0;
1349 }
1350
1351 static int rcar_vin_init_videobuf2(struct vb2_queue *vq,
1352 struct soc_camera_device *icd)
1353 {
1354 vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1355 vq->io_modes = VB2_MMAP | VB2_USERPTR;
1356 vq->drv_priv = icd;
1357 vq->ops = &rcar_vin_vb2_ops;
1358 vq->mem_ops = &vb2_dma_contig_memops;
1359 vq->buf_struct_size = sizeof(struct rcar_vin_buffer);
1360 vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1361
1362 return vb2_queue_init(vq);
1363 }
1364
1365 static struct soc_camera_host_ops rcar_vin_host_ops = {
1366 .owner = THIS_MODULE,
1367 .add = rcar_vin_add_device,
1368 .remove = rcar_vin_remove_device,
1369 .clock_start = rcar_vin_clock_start,
1370 .clock_stop = rcar_vin_clock_stop,
1371 .get_formats = rcar_vin_get_formats,
1372 .put_formats = rcar_vin_put_formats,
1373 .get_crop = rcar_vin_get_crop,
1374 .set_crop = rcar_vin_set_crop,
1375 .try_fmt = rcar_vin_try_fmt,
1376 .set_fmt = rcar_vin_set_fmt,
1377 .poll = rcar_vin_poll,
1378 .querycap = rcar_vin_querycap,
1379 .set_bus_param = rcar_vin_set_bus_param,
1380 .init_videobuf2 = rcar_vin_init_videobuf2,
1381 };
1382
1383 static struct platform_device_id rcar_vin_id_table[] = {
1384 { "r8a7779-vin", RCAR_H1 },
1385 { "r8a7778-vin", RCAR_M1 },
1386 { "uPD35004-vin", RCAR_E1 },
1387 {},
1388 };
1389 MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
1390
1391 static int rcar_vin_probe(struct platform_device *pdev)
1392 {
1393 struct rcar_vin_priv *priv;
1394 struct resource *mem;
1395 struct rcar_vin_platform_data *pdata;
1396 int irq, ret;
1397
1398 pdata = pdev->dev.platform_data;
1399 if (!pdata || !pdata->flags) {
1400 dev_err(&pdev->dev, "platform data not set\n");
1401 return -EINVAL;
1402 }
1403
1404 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1405 if (mem == NULL)
1406 return -EINVAL;
1407
1408 irq = platform_get_irq(pdev, 0);
1409 if (irq <= 0)
1410 return -EINVAL;
1411
1412 priv = devm_kzalloc(&pdev->dev, sizeof(struct rcar_vin_priv),
1413 GFP_KERNEL);
1414 if (!priv)
1415 return -ENOMEM;
1416
1417 priv->base = devm_ioremap_resource(&pdev->dev, mem);
1418 if (IS_ERR(priv->base))
1419 return PTR_ERR(priv->base);
1420
1421 ret = devm_request_irq(&pdev->dev, irq, rcar_vin_irq, IRQF_SHARED,
1422 dev_name(&pdev->dev), priv);
1423 if (ret)
1424 return ret;
1425
1426 priv->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1427 if (IS_ERR(priv->alloc_ctx))
1428 return PTR_ERR(priv->alloc_ctx);
1429
1430 priv->ici.priv = priv;
1431 priv->ici.v4l2_dev.dev = &pdev->dev;
1432 priv->ici.nr = pdev->id;
1433 priv->ici.drv_name = dev_name(&pdev->dev);
1434 priv->ici.ops = &rcar_vin_host_ops;
1435
1436 priv->pdata = pdata;
1437 priv->chip = pdev->id_entry->driver_data;
1438 spin_lock_init(&priv->lock);
1439 INIT_LIST_HEAD(&priv->capture);
1440
1441 priv->state = STOPPED;
1442
1443 pm_suspend_ignore_children(&pdev->dev, true);
1444 pm_runtime_enable(&pdev->dev);
1445
1446 ret = soc_camera_host_register(&priv->ici);
1447 if (ret)
1448 goto cleanup;
1449
1450 return 0;
1451
1452 cleanup:
1453 pm_runtime_disable(&pdev->dev);
1454 vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1455
1456 return ret;
1457 }
1458
1459 static int rcar_vin_remove(struct platform_device *pdev)
1460 {
1461 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1462 struct rcar_vin_priv *priv = container_of(soc_host,
1463 struct rcar_vin_priv, ici);
1464
1465 soc_camera_host_unregister(soc_host);
1466 pm_runtime_disable(&pdev->dev);
1467 vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1468
1469 return 0;
1470 }
1471
1472 static struct platform_driver rcar_vin_driver = {
1473 .probe = rcar_vin_probe,
1474 .remove = rcar_vin_remove,
1475 .driver = {
1476 .name = DRV_NAME,
1477 .owner = THIS_MODULE,
1478 },
1479 .id_table = rcar_vin_id_table,
1480 };
1481
1482 module_platform_driver(rcar_vin_driver);
1483
1484 MODULE_LICENSE("GPL");
1485 MODULE_ALIAS("platform:rcar_vin");
1486 MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");
Linux with added FPC-III support