[media] lirc_zilog: Don't use dynamic static allocation
[sfrench/cifs-2.6.git] / drivers / media / platform / soc_camera / rcar_vin.c
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_H2,
109         RCAR_H1,
110         RCAR_M1,
111         RCAR_E1,
112 };
113
114 enum rcar_vin_state {
115         STOPPED = 0,
116         RUNNING,
117         STOPPING,
118 };
119
120 struct rcar_vin_priv {
121         void __iomem                    *base;
122         spinlock_t                      lock;
123         int                             sequence;
124         /* State of the VIN module in capturing mode */
125         enum rcar_vin_state             state;
126         struct rcar_vin_platform_data   *pdata;
127         struct soc_camera_host          ici;
128         struct list_head                capture;
129 #define MAX_BUFFER_NUM                  3
130         struct vb2_buffer               *queue_buf[MAX_BUFFER_NUM];
131         struct vb2_alloc_ctx            *alloc_ctx;
132         enum v4l2_field                 field;
133         unsigned int                    vb_count;
134         unsigned int                    nr_hw_slots;
135         bool                            request_to_stop;
136         struct completion               capture_stop;
137         enum chip_id                    chip;
138 };
139
140 #define is_continuous_transfer(priv)    (priv->vb_count > MAX_BUFFER_NUM)
141
142 struct rcar_vin_buffer {
143         struct vb2_buffer               vb;
144         struct list_head                list;
145 };
146
147 #define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \
148                                                        struct rcar_vin_buffer, \
149                                                        vb)->list)
150
151 struct rcar_vin_cam {
152         /* VIN offsets within the camera output, before the VIN scaler */
153         unsigned int                    vin_left;
154         unsigned int                    vin_top;
155         /* Client output, as seen by the VIN */
156         unsigned int                    width;
157         unsigned int                    height;
158         /*
159          * User window from S_CROP / G_CROP, produced by client cropping and
160          * scaling, VIN scaling and VIN cropping, mapped back onto the client
161          * input window
162          */
163         struct v4l2_rect                subrect;
164         /* Camera cropping rectangle */
165         struct v4l2_rect                rect;
166         const struct soc_mbus_pixelfmt  *extra_fmt;
167 };
168
169 /*
170  * .queue_setup() is called to check whether the driver can accept the requested
171  * number of buffers and to fill in plane sizes for the current frame format if
172  * required
173  */
174 static int rcar_vin_videobuf_setup(struct vb2_queue *vq,
175                                    const struct v4l2_format *fmt,
176                                    unsigned int *count,
177                                    unsigned int *num_planes,
178                                    unsigned int sizes[], void *alloc_ctxs[])
179 {
180         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
181         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
182         struct rcar_vin_priv *priv = ici->priv;
183
184         if (fmt) {
185                 const struct soc_camera_format_xlate *xlate;
186                 unsigned int bytes_per_line;
187                 int ret;
188
189                 xlate = soc_camera_xlate_by_fourcc(icd,
190                                                    fmt->fmt.pix.pixelformat);
191                 if (!xlate)
192                         return -EINVAL;
193                 ret = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
194                                               xlate->host_fmt);
195                 if (ret < 0)
196                         return ret;
197
198                 bytes_per_line = max_t(u32, fmt->fmt.pix.bytesperline, ret);
199
200                 ret = soc_mbus_image_size(xlate->host_fmt, bytes_per_line,
201                                           fmt->fmt.pix.height);
202                 if (ret < 0)
203                         return ret;
204
205                 sizes[0] = max_t(u32, fmt->fmt.pix.sizeimage, ret);
206         } else {
207                 /* Called from VIDIOC_REQBUFS or in compatibility mode */
208                 sizes[0] = icd->sizeimage;
209         }
210
211         alloc_ctxs[0] = priv->alloc_ctx;
212
213         if (!vq->num_buffers)
214                 priv->sequence = 0;
215
216         if (!*count)
217                 *count = 2;
218         priv->vb_count = *count;
219
220         *num_planes = 1;
221
222         /* Number of hardware slots */
223         if (is_continuous_transfer(priv))
224                 priv->nr_hw_slots = MAX_BUFFER_NUM;
225         else
226                 priv->nr_hw_slots = 1;
227
228         dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
229
230         return 0;
231 }
232
233 static int rcar_vin_setup(struct rcar_vin_priv *priv)
234 {
235         struct soc_camera_device *icd = priv->ici.icd;
236         struct rcar_vin_cam *cam = icd->host_priv;
237         u32 vnmc, dmr, interrupts;
238         bool progressive = false, output_is_yuv = false;
239
240         switch (priv->field) {
241         case V4L2_FIELD_TOP:
242                 vnmc = VNMC_IM_ODD;
243                 break;
244         case V4L2_FIELD_BOTTOM:
245                 vnmc = VNMC_IM_EVEN;
246                 break;
247         case V4L2_FIELD_INTERLACED:
248         case V4L2_FIELD_INTERLACED_TB:
249                 vnmc = VNMC_IM_FULL;
250                 break;
251         case V4L2_FIELD_INTERLACED_BT:
252                 vnmc = VNMC_IM_FULL | VNMC_FOC;
253                 break;
254         case V4L2_FIELD_NONE:
255                 if (is_continuous_transfer(priv)) {
256                         vnmc = VNMC_IM_ODD_EVEN;
257                         progressive = true;
258                 } else {
259                         vnmc = VNMC_IM_ODD;
260                 }
261                 break;
262         default:
263                 vnmc = VNMC_IM_ODD;
264                 break;
265         }
266
267         /* input interface */
268         switch (icd->current_fmt->code) {
269         case V4L2_MBUS_FMT_YUYV8_1X16:
270                 /* BT.601/BT.1358 16bit YCbCr422 */
271                 vnmc |= VNMC_INF_YUV16;
272                 break;
273         case V4L2_MBUS_FMT_YUYV8_2X8:
274                 /* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */
275                 vnmc |= priv->pdata->flags & RCAR_VIN_BT656 ?
276                         VNMC_INF_YUV8_BT656 : VNMC_INF_YUV8_BT601;
277         default:
278                 break;
279         }
280
281         /* output format */
282         switch (icd->current_fmt->host_fmt->fourcc) {
283         case V4L2_PIX_FMT_NV16:
284                 iowrite32(ALIGN(cam->width * cam->height, 0x80),
285                           priv->base + VNUVAOF_REG);
286                 dmr = VNDMR_DTMD_YCSEP;
287                 output_is_yuv = true;
288                 break;
289         case V4L2_PIX_FMT_YUYV:
290                 dmr = VNDMR_BPSM;
291                 output_is_yuv = true;
292                 break;
293         case V4L2_PIX_FMT_UYVY:
294                 dmr = 0;
295                 output_is_yuv = true;
296                 break;
297         case V4L2_PIX_FMT_RGB555X:
298                 dmr = VNDMR_DTMD_ARGB1555;
299                 break;
300         case V4L2_PIX_FMT_RGB565:
301                 dmr = 0;
302                 break;
303         case V4L2_PIX_FMT_RGB32:
304                 if (priv->chip == RCAR_H2 || priv->chip == RCAR_H1 ||
305                     priv->chip == RCAR_E1) {
306                         dmr = VNDMR_EXRGB;
307                         break;
308                 }
309         default:
310                 dev_warn(icd->parent, "Invalid fourcc format (0x%x)\n",
311                          icd->current_fmt->host_fmt->fourcc);
312                 return -EINVAL;
313         }
314
315         /* Always update on field change */
316         vnmc |= VNMC_VUP;
317
318         /* If input and output use the same colorspace, use bypass mode */
319         if (output_is_yuv)
320                 vnmc |= VNMC_BPS;
321
322         /* progressive or interlaced mode */
323         interrupts = progressive ? VNIE_FIE | VNIE_EFE : VNIE_EFE;
324
325         /* ack interrupts */
326         iowrite32(interrupts, priv->base + VNINTS_REG);
327         /* enable interrupts */
328         iowrite32(interrupts, priv->base + VNIE_REG);
329         /* start capturing */
330         iowrite32(dmr, priv->base + VNDMR_REG);
331         iowrite32(vnmc | VNMC_ME, priv->base + VNMC_REG);
332
333         return 0;
334 }
335
336 static void rcar_vin_capture(struct rcar_vin_priv *priv)
337 {
338         if (is_continuous_transfer(priv))
339                 /* Continuous Frame Capture Mode */
340                 iowrite32(VNFC_C_FRAME, priv->base + VNFC_REG);
341         else
342                 /* Single Frame Capture Mode */
343                 iowrite32(VNFC_S_FRAME, priv->base + VNFC_REG);
344 }
345
346 static void rcar_vin_request_capture_stop(struct rcar_vin_priv *priv)
347 {
348         priv->state = STOPPING;
349
350         /* set continuous & single transfer off */
351         iowrite32(0, priv->base + VNFC_REG);
352         /* disable capture (release DMA buffer), reset */
353         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
354                   priv->base + VNMC_REG);
355
356         /* update the status if stopped already */
357         if (!(ioread32(priv->base + VNMS_REG) & VNMS_CA))
358                 priv->state = STOPPED;
359 }
360
361 static int rcar_vin_get_free_hw_slot(struct rcar_vin_priv *priv)
362 {
363         int slot;
364
365         for (slot = 0; slot < priv->nr_hw_slots; slot++)
366                 if (priv->queue_buf[slot] == NULL)
367                         return slot;
368
369         return -1;
370 }
371
372 static int rcar_vin_hw_ready(struct rcar_vin_priv *priv)
373 {
374         /* Ensure all HW slots are filled */
375         return rcar_vin_get_free_hw_slot(priv) < 0 ? 1 : 0;
376 }
377
378 /* Moves a buffer from the queue to the HW slots */
379 static int rcar_vin_fill_hw_slot(struct rcar_vin_priv *priv)
380 {
381         struct vb2_buffer *vb;
382         dma_addr_t phys_addr_top;
383         int slot;
384
385         if (list_empty(&priv->capture))
386                 return 0;
387
388         /* Find a free HW slot */
389         slot = rcar_vin_get_free_hw_slot(priv);
390         if (slot < 0)
391                 return 0;
392
393         vb = &list_entry(priv->capture.next, struct rcar_vin_buffer, list)->vb;
394         list_del_init(to_buf_list(vb));
395         priv->queue_buf[slot] = vb;
396         phys_addr_top = vb2_dma_contig_plane_dma_addr(vb, 0);
397         iowrite32(phys_addr_top, priv->base + VNMB_REG(slot));
398
399         return 1;
400 }
401
402 static void rcar_vin_videobuf_queue(struct vb2_buffer *vb)
403 {
404         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
405         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
406         struct rcar_vin_priv *priv = ici->priv;
407         unsigned long size;
408
409         size = icd->sizeimage;
410
411         if (vb2_plane_size(vb, 0) < size) {
412                 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
413                         vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
414                 goto error;
415         }
416
417         vb2_set_plane_payload(vb, 0, size);
418
419         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
420                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
421
422         spin_lock_irq(&priv->lock);
423
424         list_add_tail(to_buf_list(vb), &priv->capture);
425         rcar_vin_fill_hw_slot(priv);
426
427         /* If we weren't running, and have enough buffers, start capturing! */
428         if (priv->state != RUNNING && rcar_vin_hw_ready(priv)) {
429                 if (rcar_vin_setup(priv)) {
430                         /* Submit error */
431                         list_del_init(to_buf_list(vb));
432                         spin_unlock_irq(&priv->lock);
433                         goto error;
434                 }
435                 priv->request_to_stop = false;
436                 init_completion(&priv->capture_stop);
437                 priv->state = RUNNING;
438                 rcar_vin_capture(priv);
439         }
440
441         spin_unlock_irq(&priv->lock);
442
443         return;
444
445 error:
446         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
447 }
448
449 static void rcar_vin_videobuf_release(struct vb2_buffer *vb)
450 {
451         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
452         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
453         struct rcar_vin_priv *priv = ici->priv;
454         unsigned int i;
455         int buf_in_use = 0;
456
457         spin_lock_irq(&priv->lock);
458
459         /* Is the buffer in use by the VIN hardware? */
460         for (i = 0; i < MAX_BUFFER_NUM; i++) {
461                 if (priv->queue_buf[i] == vb) {
462                         buf_in_use = 1;
463                         break;
464                 }
465         }
466
467         if (buf_in_use) {
468                 while (priv->state != STOPPED) {
469
470                         /* issue stop if running */
471                         if (priv->state == RUNNING)
472                                 rcar_vin_request_capture_stop(priv);
473
474                         /* wait until capturing has been stopped */
475                         if (priv->state == STOPPING) {
476                                 priv->request_to_stop = true;
477                                 spin_unlock_irq(&priv->lock);
478                                 wait_for_completion(&priv->capture_stop);
479                                 spin_lock_irq(&priv->lock);
480                         }
481                 }
482                 /*
483                  * Capturing has now stopped. The buffer we have been asked
484                  * to release could be any of the current buffers in use, so
485                  * release all buffers that are in use by HW
486                  */
487                 for (i = 0; i < MAX_BUFFER_NUM; i++) {
488                         if (priv->queue_buf[i]) {
489                                 vb2_buffer_done(priv->queue_buf[i],
490                                         VB2_BUF_STATE_ERROR);
491                                 priv->queue_buf[i] = NULL;
492                         }
493                 }
494         } else {
495                 list_del_init(to_buf_list(vb));
496         }
497
498         spin_unlock_irq(&priv->lock);
499 }
500
501 static int rcar_vin_videobuf_init(struct vb2_buffer *vb)
502 {
503         INIT_LIST_HEAD(to_buf_list(vb));
504         return 0;
505 }
506
507 static int rcar_vin_stop_streaming(struct vb2_queue *vq)
508 {
509         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
510         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
511         struct rcar_vin_priv *priv = ici->priv;
512         struct list_head *buf_head, *tmp;
513
514         spin_lock_irq(&priv->lock);
515         list_for_each_safe(buf_head, tmp, &priv->capture)
516                 list_del_init(buf_head);
517         spin_unlock_irq(&priv->lock);
518
519         return 0;
520 }
521
522 static struct vb2_ops rcar_vin_vb2_ops = {
523         .queue_setup    = rcar_vin_videobuf_setup,
524         .buf_init       = rcar_vin_videobuf_init,
525         .buf_cleanup    = rcar_vin_videobuf_release,
526         .buf_queue      = rcar_vin_videobuf_queue,
527         .stop_streaming = rcar_vin_stop_streaming,
528         .wait_prepare   = soc_camera_unlock,
529         .wait_finish    = soc_camera_lock,
530 };
531
532 static irqreturn_t rcar_vin_irq(int irq, void *data)
533 {
534         struct rcar_vin_priv *priv = data;
535         u32 int_status;
536         bool can_run = false, hw_stopped;
537         int slot;
538         unsigned int handled = 0;
539
540         spin_lock(&priv->lock);
541
542         int_status = ioread32(priv->base + VNINTS_REG);
543         if (!int_status)
544                 goto done;
545         /* ack interrupts */
546         iowrite32(int_status, priv->base + VNINTS_REG);
547         handled = 1;
548
549         /* nothing to do if capture status is 'STOPPED' */
550         if (priv->state == STOPPED)
551                 goto done;
552
553         hw_stopped = !(ioread32(priv->base + VNMS_REG) & VNMS_CA);
554
555         if (!priv->request_to_stop) {
556                 if (is_continuous_transfer(priv))
557                         slot = (ioread32(priv->base + VNMS_REG) &
558                                 VNMS_FBS_MASK) >> VNMS_FBS_SHIFT;
559                 else
560                         slot = 0;
561
562                 priv->queue_buf[slot]->v4l2_buf.field = priv->field;
563                 priv->queue_buf[slot]->v4l2_buf.sequence = priv->sequence++;
564                 do_gettimeofday(&priv->queue_buf[slot]->v4l2_buf.timestamp);
565                 vb2_buffer_done(priv->queue_buf[slot], VB2_BUF_STATE_DONE);
566                 priv->queue_buf[slot] = NULL;
567
568                 if (priv->state != STOPPING)
569                         can_run = rcar_vin_fill_hw_slot(priv);
570
571                 if (hw_stopped || !can_run) {
572                         priv->state = STOPPED;
573                 } else if (is_continuous_transfer(priv) &&
574                            list_empty(&priv->capture) &&
575                            priv->state == RUNNING) {
576                         /*
577                          * The continuous capturing requires an explicit stop
578                          * operation when there is no buffer to be set into
579                          * the VnMBm registers.
580                          */
581                         rcar_vin_request_capture_stop(priv);
582                 } else {
583                         rcar_vin_capture(priv);
584                 }
585
586         } else if (hw_stopped) {
587                 priv->state = STOPPED;
588                 priv->request_to_stop = false;
589                 complete(&priv->capture_stop);
590         }
591
592 done:
593         spin_unlock(&priv->lock);
594
595         return IRQ_RETVAL(handled);
596 }
597
598 static int rcar_vin_add_device(struct soc_camera_device *icd)
599 {
600         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
601         struct rcar_vin_priv *priv = ici->priv;
602         int i;
603
604         for (i = 0; i < MAX_BUFFER_NUM; i++)
605                 priv->queue_buf[i] = NULL;
606
607         pm_runtime_get_sync(ici->v4l2_dev.dev);
608
609         dev_dbg(icd->parent, "R-Car VIN driver attached to camera %d\n",
610                 icd->devnum);
611
612         return 0;
613 }
614
615 static void rcar_vin_remove_device(struct soc_camera_device *icd)
616 {
617         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
618         struct rcar_vin_priv *priv = ici->priv;
619         struct vb2_buffer *vb;
620         int i;
621
622         /* disable capture, disable interrupts */
623         iowrite32(ioread32(priv->base + VNMC_REG) & ~VNMC_ME,
624                   priv->base + VNMC_REG);
625         iowrite32(0, priv->base + VNIE_REG);
626
627         priv->state = STOPPED;
628         priv->request_to_stop = false;
629
630         /* make sure active buffer is cancelled */
631         spin_lock_irq(&priv->lock);
632         for (i = 0; i < MAX_BUFFER_NUM; i++) {
633                 vb = priv->queue_buf[i];
634                 if (vb) {
635                         list_del_init(to_buf_list(vb));
636                         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
637                 }
638         }
639         spin_unlock_irq(&priv->lock);
640
641         pm_runtime_put(ici->v4l2_dev.dev);
642
643         dev_dbg(icd->parent, "R-Car VIN driver detached from camera %d\n",
644                 icd->devnum);
645 }
646
647 /* Called with .host_lock held */
648 static int rcar_vin_clock_start(struct soc_camera_host *ici)
649 {
650         /* VIN does not have "mclk" */
651         return 0;
652 }
653
654 /* Called with .host_lock held */
655 static void rcar_vin_clock_stop(struct soc_camera_host *ici)
656 {
657         /* VIN does not have "mclk" */
658 }
659
660 /* rect is guaranteed to not exceed the scaled camera rectangle */
661 static int rcar_vin_set_rect(struct soc_camera_device *icd)
662 {
663         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
664         struct rcar_vin_cam *cam = icd->host_priv;
665         struct rcar_vin_priv *priv = ici->priv;
666         unsigned int left_offset, top_offset;
667         unsigned char dsize = 0;
668         struct v4l2_rect *cam_subrect = &cam->subrect;
669
670         dev_dbg(icd->parent, "Crop %ux%u@%u:%u\n",
671                 icd->user_width, icd->user_height, cam->vin_left, cam->vin_top);
672
673         left_offset = cam->vin_left;
674         top_offset = cam->vin_top;
675
676         if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_RGB32 &&
677             priv->chip == RCAR_E1)
678                 dsize = 1;
679
680         dev_dbg(icd->parent, "Cam %ux%u@%u:%u\n",
681                 cam->width, cam->height, cam->vin_left, cam->vin_top);
682         dev_dbg(icd->parent, "Cam subrect %ux%u@%u:%u\n",
683                 cam_subrect->width, cam_subrect->height,
684                 cam_subrect->left, cam_subrect->top);
685
686         /* Set Start/End Pixel/Line Pre-Clip */
687         iowrite32(left_offset << dsize, priv->base + VNSPPRC_REG);
688         iowrite32((left_offset + cam->width - 1) << dsize,
689                   priv->base + VNEPPRC_REG);
690         switch (priv->field) {
691         case V4L2_FIELD_INTERLACED:
692         case V4L2_FIELD_INTERLACED_TB:
693         case V4L2_FIELD_INTERLACED_BT:
694                 iowrite32(top_offset / 2, priv->base + VNSLPRC_REG);
695                 iowrite32((top_offset + cam->height) / 2 - 1,
696                           priv->base + VNELPRC_REG);
697                 break;
698         default:
699                 iowrite32(top_offset, priv->base + VNSLPRC_REG);
700                 iowrite32(top_offset + cam->height - 1,
701                           priv->base + VNELPRC_REG);
702                 break;
703         }
704
705         /* Set Start/End Pixel/Line Post-Clip */
706         iowrite32(0, priv->base + VNSPPOC_REG);
707         iowrite32(0, priv->base + VNSLPOC_REG);
708         iowrite32((cam_subrect->width - 1) << dsize, priv->base + VNEPPOC_REG);
709         switch (priv->field) {
710         case V4L2_FIELD_INTERLACED:
711         case V4L2_FIELD_INTERLACED_TB:
712         case V4L2_FIELD_INTERLACED_BT:
713                 iowrite32(cam_subrect->height / 2 - 1,
714                           priv->base + VNELPOC_REG);
715                 break;
716         default:
717                 iowrite32(cam_subrect->height - 1, priv->base + VNELPOC_REG);
718                 break;
719         }
720
721         iowrite32(ALIGN(cam->width, 0x10), priv->base + VNIS_REG);
722
723         return 0;
724 }
725
726 static void capture_stop_preserve(struct rcar_vin_priv *priv, u32 *vnmc)
727 {
728         *vnmc = ioread32(priv->base + VNMC_REG);
729         /* module disable */
730         iowrite32(*vnmc & ~VNMC_ME, priv->base + VNMC_REG);
731 }
732
733 static void capture_restore(struct rcar_vin_priv *priv, u32 vnmc)
734 {
735         unsigned long timeout = jiffies + 10 * HZ;
736
737         /*
738          * Wait until the end of the current frame. It can take a long time,
739          * but if it has been aborted by a MRST1 reset, it should exit sooner.
740          */
741         while ((ioread32(priv->base + VNMS_REG) & VNMS_AV) &&
742                 time_before(jiffies, timeout))
743                 msleep(1);
744
745         if (time_after(jiffies, timeout)) {
746                 dev_err(priv->ici.v4l2_dev.dev,
747                         "Timeout waiting for frame end! Interface problem?\n");
748                 return;
749         }
750
751         iowrite32(vnmc, priv->base + VNMC_REG);
752 }
753
754 #define VIN_MBUS_FLAGS  (V4L2_MBUS_MASTER |             \
755                          V4L2_MBUS_PCLK_SAMPLE_RISING | \
756                          V4L2_MBUS_HSYNC_ACTIVE_HIGH |  \
757                          V4L2_MBUS_HSYNC_ACTIVE_LOW |   \
758                          V4L2_MBUS_VSYNC_ACTIVE_HIGH |  \
759                          V4L2_MBUS_VSYNC_ACTIVE_LOW |   \
760                          V4L2_MBUS_DATA_ACTIVE_HIGH)
761
762 static int rcar_vin_set_bus_param(struct soc_camera_device *icd)
763 {
764         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
765         struct rcar_vin_priv *priv = ici->priv;
766         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
767         struct v4l2_mbus_config cfg;
768         unsigned long common_flags;
769         u32 vnmc;
770         u32 val;
771         int ret;
772
773         capture_stop_preserve(priv, &vnmc);
774
775         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
776         if (!ret) {
777                 common_flags = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
778                 if (!common_flags) {
779                         dev_warn(icd->parent,
780                                  "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
781                                  cfg.flags, VIN_MBUS_FLAGS);
782                         return -EINVAL;
783                 }
784         } else if (ret != -ENOIOCTLCMD) {
785                 return ret;
786         } else {
787                 common_flags = VIN_MBUS_FLAGS;
788         }
789
790         /* Make choises, based on platform preferences */
791         if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
792             (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
793                 if (priv->pdata->flags & RCAR_VIN_HSYNC_ACTIVE_LOW)
794                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
795                 else
796                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
797         }
798
799         if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
800             (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
801                 if (priv->pdata->flags & RCAR_VIN_VSYNC_ACTIVE_LOW)
802                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
803                 else
804                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
805         }
806
807         cfg.flags = common_flags;
808         ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
809         if (ret < 0 && ret != -ENOIOCTLCMD)
810                 return ret;
811
812         val = priv->field == V4L2_FIELD_NONE ? VNDMR2_FTEV : 0;
813         if (!(common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW))
814                 val |= VNDMR2_VPS;
815         if (!(common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW))
816                 val |= VNDMR2_HPS;
817         iowrite32(val, priv->base + VNDMR2_REG);
818
819         ret = rcar_vin_set_rect(icd);
820         if (ret < 0)
821                 return ret;
822
823         capture_restore(priv, vnmc);
824
825         return 0;
826 }
827
828 static int rcar_vin_try_bus_param(struct soc_camera_device *icd,
829                                   unsigned char buswidth)
830 {
831         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
832         struct v4l2_mbus_config cfg;
833         int ret;
834
835         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
836         if (ret == -ENOIOCTLCMD)
837                 return 0;
838         else if (ret)
839                 return ret;
840
841         if (buswidth > 24)
842                 return -EINVAL;
843
844         /* check is there common mbus flags */
845         ret = soc_mbus_config_compatible(&cfg, VIN_MBUS_FLAGS);
846         if (ret)
847                 return 0;
848
849         dev_warn(icd->parent,
850                 "MBUS flags incompatible: camera 0x%x, host 0x%x\n",
851                  cfg.flags, VIN_MBUS_FLAGS);
852
853         return -EINVAL;
854 }
855
856 static bool rcar_vin_packing_supported(const struct soc_mbus_pixelfmt *fmt)
857 {
858         return  fmt->packing == SOC_MBUS_PACKING_NONE ||
859                 (fmt->bits_per_sample > 8 &&
860                  fmt->packing == SOC_MBUS_PACKING_EXTEND16);
861 }
862
863 static const struct soc_mbus_pixelfmt rcar_vin_formats[] = {
864         {
865                 .fourcc                 = V4L2_PIX_FMT_NV16,
866                 .name                   = "NV16",
867                 .bits_per_sample        = 8,
868                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
869                 .order                  = SOC_MBUS_ORDER_LE,
870                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
871         },
872         {
873                 .fourcc                 = V4L2_PIX_FMT_UYVY,
874                 .name                   = "UYVY",
875                 .bits_per_sample        = 16,
876                 .packing                = SOC_MBUS_PACKING_NONE,
877                 .order                  = SOC_MBUS_ORDER_LE,
878                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
879         },
880         {
881                 .fourcc                 = V4L2_PIX_FMT_RGB565,
882                 .name                   = "RGB565",
883                 .bits_per_sample        = 16,
884                 .packing                = SOC_MBUS_PACKING_NONE,
885                 .order                  = SOC_MBUS_ORDER_LE,
886                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
887         },
888         {
889                 .fourcc                 = V4L2_PIX_FMT_RGB555X,
890                 .name                   = "ARGB1555",
891                 .bits_per_sample        = 16,
892                 .packing                = SOC_MBUS_PACKING_NONE,
893                 .order                  = SOC_MBUS_ORDER_LE,
894                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
895         },
896         {
897                 .fourcc                 = V4L2_PIX_FMT_RGB32,
898                 .name                   = "RGB888",
899                 .bits_per_sample        = 32,
900                 .packing                = SOC_MBUS_PACKING_NONE,
901                 .order                  = SOC_MBUS_ORDER_LE,
902                 .layout                 = SOC_MBUS_LAYOUT_PACKED,
903         },
904 };
905
906 static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
907                                 struct soc_camera_format_xlate *xlate)
908 {
909         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
910         struct device *dev = icd->parent;
911         int ret, k, n;
912         int formats = 0;
913         struct rcar_vin_cam *cam;
914         enum v4l2_mbus_pixelcode code;
915         const struct soc_mbus_pixelfmt *fmt;
916
917         ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
918         if (ret < 0)
919                 return 0;
920
921         fmt = soc_mbus_get_fmtdesc(code);
922         if (!fmt) {
923                 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
924                 return 0;
925         }
926
927         ret = rcar_vin_try_bus_param(icd, fmt->bits_per_sample);
928         if (ret < 0)
929                 return 0;
930
931         if (!icd->host_priv) {
932                 struct v4l2_mbus_framefmt mf;
933                 struct v4l2_rect rect;
934                 struct device *dev = icd->parent;
935                 int shift;
936
937                 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
938                 if (ret < 0)
939                         return ret;
940
941                 /* Cache current client geometry */
942                 ret = soc_camera_client_g_rect(sd, &rect);
943                 if (ret == -ENOIOCTLCMD) {
944                         /* Sensor driver doesn't support cropping */
945                         rect.left = 0;
946                         rect.top = 0;
947                         rect.width = mf.width;
948                         rect.height = mf.height;
949                 } else if (ret < 0) {
950                         return ret;
951                 }
952
953                 /*
954                  * If sensor proposes too large format then try smaller ones:
955                  * 1280x960, 640x480, 320x240
956                  */
957                 for (shift = 0; shift < 3; shift++) {
958                         if (mf.width <= VIN_MAX_WIDTH &&
959                             mf.height <= VIN_MAX_HEIGHT)
960                                 break;
961
962                         mf.width = 1280 >> shift;
963                         mf.height = 960 >> shift;
964                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
965                                                          soc_camera_grp_id(icd),
966                                                          video, s_mbus_fmt,
967                                                          &mf);
968                         if (ret < 0)
969                                 return ret;
970                 }
971
972                 if (shift == 3) {
973                         dev_err(dev,
974                                 "Failed to configure the client below %ux%x\n",
975                                 mf.width, mf.height);
976                         return -EIO;
977                 }
978
979                 dev_dbg(dev, "camera fmt %ux%u\n", mf.width, mf.height);
980
981                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
982                 if (!cam)
983                         return -ENOMEM;
984                 /*
985                  * We are called with current camera crop,
986                  * initialise subrect with it
987                  */
988                 cam->rect = rect;
989                 cam->subrect = rect;
990                 cam->width = mf.width;
991                 cam->height = mf.height;
992
993                 icd->host_priv = cam;
994         } else {
995                 cam = icd->host_priv;
996         }
997
998         /* Beginning of a pass */
999         if (!idx)
1000                 cam->extra_fmt = NULL;
1001
1002         switch (code) {
1003         case V4L2_MBUS_FMT_YUYV8_1X16:
1004         case V4L2_MBUS_FMT_YUYV8_2X8:
1005                 if (cam->extra_fmt)
1006                         break;
1007
1008                 /* Add all our formats that can be generated by VIN */
1009                 cam->extra_fmt = rcar_vin_formats;
1010
1011                 n = ARRAY_SIZE(rcar_vin_formats);
1012                 formats += n;
1013                 for (k = 0; xlate && k < n; k++, xlate++) {
1014                         xlate->host_fmt = &rcar_vin_formats[k];
1015                         xlate->code = code;
1016                         dev_dbg(dev, "Providing format %s using code %d\n",
1017                                 rcar_vin_formats[k].name, code);
1018                 }
1019                 break;
1020         default:
1021                 if (!rcar_vin_packing_supported(fmt))
1022                         return 0;
1023
1024                 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1025                         fmt->name);
1026                 break;
1027         }
1028
1029         /* Generic pass-through */
1030         formats++;
1031         if (xlate) {
1032                 xlate->host_fmt = fmt;
1033                 xlate->code = code;
1034                 xlate++;
1035         }
1036
1037         return formats;
1038 }
1039
1040 static void rcar_vin_put_formats(struct soc_camera_device *icd)
1041 {
1042         kfree(icd->host_priv);
1043         icd->host_priv = NULL;
1044 }
1045
1046 static int rcar_vin_set_crop(struct soc_camera_device *icd,
1047                              const struct v4l2_crop *a)
1048 {
1049         struct v4l2_crop a_writable = *a;
1050         const struct v4l2_rect *rect = &a_writable.c;
1051         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1052         struct rcar_vin_priv *priv = ici->priv;
1053         struct v4l2_crop cam_crop;
1054         struct rcar_vin_cam *cam = icd->host_priv;
1055         struct v4l2_rect *cam_rect = &cam_crop.c;
1056         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1057         struct device *dev = icd->parent;
1058         struct v4l2_mbus_framefmt mf;
1059         u32 vnmc;
1060         int ret, i;
1061
1062         dev_dbg(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1063                 rect->left, rect->top);
1064
1065         /* During camera cropping its output window can change too, stop VIN */
1066         capture_stop_preserve(priv, &vnmc);
1067         dev_dbg(dev, "VNMC_REG 0x%x\n", vnmc);
1068
1069         /* Apply iterative camera S_CROP for new input window. */
1070         ret = soc_camera_client_s_crop(sd, &a_writable, &cam_crop,
1071                                        &cam->rect, &cam->subrect);
1072         if (ret < 0)
1073                 return ret;
1074
1075         dev_dbg(dev, "camera cropped to %ux%u@%u:%u\n",
1076                 cam_rect->width, cam_rect->height,
1077                 cam_rect->left, cam_rect->top);
1078
1079         /* On success cam_crop contains current camera crop */
1080
1081         /* Retrieve camera output window */
1082         ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1083         if (ret < 0)
1084                 return ret;
1085
1086         if (mf.width > VIN_MAX_WIDTH || mf.height > VIN_MAX_HEIGHT)
1087                 return -EINVAL;
1088
1089         /* Cache camera output window */
1090         cam->width = mf.width;
1091         cam->height = mf.height;
1092
1093         icd->user_width  = cam->width;
1094         icd->user_height = cam->height;
1095
1096         cam->vin_left = rect->left & ~1;
1097         cam->vin_top = rect->top & ~1;
1098
1099         /* Use VIN cropping to crop to the new window. */
1100         ret = rcar_vin_set_rect(icd);
1101         if (ret < 0)
1102                 return ret;
1103
1104         cam->subrect = *rect;
1105
1106         dev_dbg(dev, "VIN cropped to %ux%u@%u:%u\n",
1107                 icd->user_width, icd->user_height,
1108                 cam->vin_left, cam->vin_top);
1109
1110         /* Restore capture */
1111         for (i = 0; i < MAX_BUFFER_NUM; i++) {
1112                 if (priv->queue_buf[i] && priv->state == STOPPED) {
1113                         vnmc |= VNMC_ME;
1114                         break;
1115                 }
1116         }
1117         capture_restore(priv, vnmc);
1118
1119         /* Even if only camera cropping succeeded */
1120         return ret;
1121 }
1122
1123 static int rcar_vin_get_crop(struct soc_camera_device *icd,
1124                              struct v4l2_crop *a)
1125 {
1126         struct rcar_vin_cam *cam = icd->host_priv;
1127
1128         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1129         a->c = cam->subrect;
1130
1131         return 0;
1132 }
1133
1134 /* Similar to set_crop multistage iterative algorithm */
1135 static int rcar_vin_set_fmt(struct soc_camera_device *icd,
1136                             struct v4l2_format *f)
1137 {
1138         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1139         struct rcar_vin_priv *priv = ici->priv;
1140         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1141         struct rcar_vin_cam *cam = icd->host_priv;
1142         struct v4l2_pix_format *pix = &f->fmt.pix;
1143         struct v4l2_mbus_framefmt mf;
1144         struct device *dev = icd->parent;
1145         __u32 pixfmt = pix->pixelformat;
1146         const struct soc_camera_format_xlate *xlate;
1147         unsigned int vin_sub_width = 0, vin_sub_height = 0;
1148         int ret;
1149         bool can_scale;
1150         enum v4l2_field field;
1151         v4l2_std_id std;
1152
1153         dev_dbg(dev, "S_FMT(pix=0x%x, %ux%u)\n",
1154                 pixfmt, pix->width, pix->height);
1155
1156         switch (pix->field) {
1157         default:
1158                 pix->field = V4L2_FIELD_NONE;
1159                 /* fall-through */
1160         case V4L2_FIELD_NONE:
1161         case V4L2_FIELD_TOP:
1162         case V4L2_FIELD_BOTTOM:
1163         case V4L2_FIELD_INTERLACED_TB:
1164         case V4L2_FIELD_INTERLACED_BT:
1165                 field = pix->field;
1166                 break;
1167         case V4L2_FIELD_INTERLACED:
1168                 /* Query for standard if not explicitly mentioned _TB/_BT */
1169                 ret = v4l2_subdev_call(sd, video, querystd, &std);
1170                 if (ret < 0)
1171                         std = V4L2_STD_625_50;
1172
1173                 field = std & V4L2_STD_625_50 ? V4L2_FIELD_INTERLACED_TB :
1174                                                 V4L2_FIELD_INTERLACED_BT;
1175                 break;
1176         }
1177
1178         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1179         if (!xlate) {
1180                 dev_warn(dev, "Format %x not found\n", pixfmt);
1181                 return -EINVAL;
1182         }
1183         /* Calculate client output geometry */
1184         soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf,
1185                                       12);
1186         mf.field = pix->field;
1187         mf.colorspace = pix->colorspace;
1188         mf.code  = xlate->code;
1189
1190         switch (pixfmt) {
1191         case V4L2_PIX_FMT_RGB32:
1192                 can_scale = priv->chip != RCAR_E1;
1193                 break;
1194         case V4L2_PIX_FMT_UYVY:
1195         case V4L2_PIX_FMT_YUYV:
1196         case V4L2_PIX_FMT_RGB565:
1197         case V4L2_PIX_FMT_RGB555X:
1198                 can_scale = true;
1199                 break;
1200         default:
1201                 can_scale = false;
1202                 break;
1203         }
1204
1205         dev_dbg(dev, "request camera output %ux%u\n", mf.width, mf.height);
1206
1207         ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1208                                       &mf, &vin_sub_width, &vin_sub_height,
1209                                       can_scale, 12);
1210
1211         /* Done with the camera. Now see if we can improve the result */
1212         dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
1213                 ret, mf.width, mf.height, pix->width, pix->height);
1214
1215         if (ret == -ENOIOCTLCMD)
1216                 dev_dbg(dev, "Sensor doesn't support scaling\n");
1217         else if (ret < 0)
1218                 return ret;
1219
1220         if (mf.code != xlate->code)
1221                 return -EINVAL;
1222
1223         /* Prepare VIN crop */
1224         cam->width = mf.width;
1225         cam->height = mf.height;
1226
1227         /* Use VIN scaling to scale to the requested user window. */
1228
1229         /* We cannot scale up */
1230         if (pix->width > vin_sub_width)
1231                 vin_sub_width = pix->width;
1232
1233         if (pix->height > vin_sub_height)
1234                 vin_sub_height = pix->height;
1235
1236         pix->colorspace = mf.colorspace;
1237
1238         if (!can_scale) {
1239                 pix->width = vin_sub_width;
1240                 pix->height = vin_sub_height;
1241         }
1242
1243         /*
1244          * We have calculated CFLCR, the actual configuration will be performed
1245          * in rcar_vin_set_bus_param()
1246          */
1247
1248         dev_dbg(dev, "W: %u : %u, H: %u : %u\n",
1249                 vin_sub_width, pix->width, vin_sub_height, pix->height);
1250
1251         icd->current_fmt = xlate;
1252
1253         priv->field = field;
1254
1255         return 0;
1256 }
1257
1258 static int rcar_vin_try_fmt(struct soc_camera_device *icd,
1259                             struct v4l2_format *f)
1260 {
1261         const struct soc_camera_format_xlate *xlate;
1262         struct v4l2_pix_format *pix = &f->fmt.pix;
1263         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1264         struct v4l2_mbus_framefmt mf;
1265         __u32 pixfmt = pix->pixelformat;
1266         int width, height;
1267         int ret;
1268
1269         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1270         if (!xlate) {
1271                 xlate = icd->current_fmt;
1272                 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1273                         pixfmt, xlate->host_fmt->fourcc);
1274                 pixfmt = xlate->host_fmt->fourcc;
1275                 pix->pixelformat = pixfmt;
1276                 pix->colorspace = icd->colorspace;
1277         }
1278
1279         /* FIXME: calculate using depth and bus width */
1280         v4l_bound_align_image(&pix->width, 2, VIN_MAX_WIDTH, 1,
1281                               &pix->height, 4, VIN_MAX_HEIGHT, 2, 0);
1282
1283         width = pix->width;
1284         height = pix->height;
1285
1286         /* let soc-camera calculate these values */
1287         pix->bytesperline = 0;
1288         pix->sizeimage = 0;
1289
1290         /* limit to sensor capabilities */
1291         mf.width = pix->width;
1292         mf.height = pix->height;
1293         mf.field = pix->field;
1294         mf.code = xlate->code;
1295         mf.colorspace = pix->colorspace;
1296
1297         ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1298                                          video, try_mbus_fmt, &mf);
1299         if (ret < 0)
1300                 return ret;
1301
1302         pix->width = mf.width;
1303         pix->height = mf.height;
1304         pix->field = mf.field;
1305         pix->colorspace = mf.colorspace;
1306
1307         if (pixfmt == V4L2_PIX_FMT_NV16) {
1308                 /* FIXME: check against rect_max after converting soc-camera */
1309                 /* We can scale precisely, need a bigger image from camera */
1310                 if (pix->width < width || pix->height < height) {
1311                         /*
1312                          * We presume, the sensor behaves sanely, i.e. if
1313                          * requested a bigger rectangle, it will not return a
1314                          * smaller one.
1315                          */
1316                         mf.width = VIN_MAX_WIDTH;
1317                         mf.height = VIN_MAX_HEIGHT;
1318                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1319                                                          soc_camera_grp_id(icd),
1320                                                          video, try_mbus_fmt,
1321                                                          &mf);
1322                         if (ret < 0) {
1323                                 dev_err(icd->parent,
1324                                         "client try_fmt() = %d\n", ret);
1325                                 return ret;
1326                         }
1327                 }
1328                 /* We will scale exactly */
1329                 if (mf.width > width)
1330                         pix->width = width;
1331                 if (mf.height > height)
1332                         pix->height = height;
1333         }
1334
1335         return ret;
1336 }
1337
1338 static unsigned int rcar_vin_poll(struct file *file, poll_table *pt)
1339 {
1340         struct soc_camera_device *icd = file->private_data;
1341
1342         return vb2_poll(&icd->vb2_vidq, file, pt);
1343 }
1344
1345 static int rcar_vin_querycap(struct soc_camera_host *ici,
1346                              struct v4l2_capability *cap)
1347 {
1348         strlcpy(cap->card, "R_Car_VIN", sizeof(cap->card));
1349         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1350         return 0;
1351 }
1352
1353 static int rcar_vin_init_videobuf2(struct vb2_queue *vq,
1354                                    struct soc_camera_device *icd)
1355 {
1356         vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1357         vq->io_modes = VB2_MMAP | VB2_USERPTR;
1358         vq->drv_priv = icd;
1359         vq->ops = &rcar_vin_vb2_ops;
1360         vq->mem_ops = &vb2_dma_contig_memops;
1361         vq->buf_struct_size = sizeof(struct rcar_vin_buffer);
1362         vq->timestamp_type  = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1363
1364         return vb2_queue_init(vq);
1365 }
1366
1367 static struct soc_camera_host_ops rcar_vin_host_ops = {
1368         .owner          = THIS_MODULE,
1369         .add            = rcar_vin_add_device,
1370         .remove         = rcar_vin_remove_device,
1371         .clock_start    = rcar_vin_clock_start,
1372         .clock_stop     = rcar_vin_clock_stop,
1373         .get_formats    = rcar_vin_get_formats,
1374         .put_formats    = rcar_vin_put_formats,
1375         .get_crop       = rcar_vin_get_crop,
1376         .set_crop       = rcar_vin_set_crop,
1377         .try_fmt        = rcar_vin_try_fmt,
1378         .set_fmt        = rcar_vin_set_fmt,
1379         .poll           = rcar_vin_poll,
1380         .querycap       = rcar_vin_querycap,
1381         .set_bus_param  = rcar_vin_set_bus_param,
1382         .init_videobuf2 = rcar_vin_init_videobuf2,
1383 };
1384
1385 static struct platform_device_id rcar_vin_id_table[] = {
1386         { "r8a7790-vin",  RCAR_H2 },
1387         { "r8a7779-vin",  RCAR_H1 },
1388         { "r8a7778-vin",  RCAR_M1 },
1389         { "uPD35004-vin", RCAR_E1 },
1390         {},
1391 };
1392 MODULE_DEVICE_TABLE(platform, rcar_vin_id_table);
1393
1394 static int rcar_vin_probe(struct platform_device *pdev)
1395 {
1396         struct rcar_vin_priv *priv;
1397         struct resource *mem;
1398         struct rcar_vin_platform_data *pdata;
1399         int irq, ret;
1400
1401         pdata = pdev->dev.platform_data;
1402         if (!pdata || !pdata->flags) {
1403                 dev_err(&pdev->dev, "platform data not set\n");
1404                 return -EINVAL;
1405         }
1406
1407         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1408         if (mem == NULL)
1409                 return -EINVAL;
1410
1411         irq = platform_get_irq(pdev, 0);
1412         if (irq <= 0)
1413                 return -EINVAL;
1414
1415         priv = devm_kzalloc(&pdev->dev, sizeof(struct rcar_vin_priv),
1416                             GFP_KERNEL);
1417         if (!priv)
1418                 return -ENOMEM;
1419
1420         priv->base = devm_ioremap_resource(&pdev->dev, mem);
1421         if (IS_ERR(priv->base))
1422                 return PTR_ERR(priv->base);
1423
1424         ret = devm_request_irq(&pdev->dev, irq, rcar_vin_irq, IRQF_SHARED,
1425                                dev_name(&pdev->dev), priv);
1426         if (ret)
1427                 return ret;
1428
1429         priv->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1430         if (IS_ERR(priv->alloc_ctx))
1431                 return PTR_ERR(priv->alloc_ctx);
1432
1433         priv->ici.priv = priv;
1434         priv->ici.v4l2_dev.dev = &pdev->dev;
1435         priv->ici.nr = pdev->id;
1436         priv->ici.drv_name = dev_name(&pdev->dev);
1437         priv->ici.ops = &rcar_vin_host_ops;
1438
1439         priv->pdata = pdata;
1440         priv->chip = pdev->id_entry->driver_data;
1441         spin_lock_init(&priv->lock);
1442         INIT_LIST_HEAD(&priv->capture);
1443
1444         priv->state = STOPPED;
1445
1446         pm_suspend_ignore_children(&pdev->dev, true);
1447         pm_runtime_enable(&pdev->dev);
1448
1449         ret = soc_camera_host_register(&priv->ici);
1450         if (ret)
1451                 goto cleanup;
1452
1453         return 0;
1454
1455 cleanup:
1456         pm_runtime_disable(&pdev->dev);
1457         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1458
1459         return ret;
1460 }
1461
1462 static int rcar_vin_remove(struct platform_device *pdev)
1463 {
1464         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1465         struct rcar_vin_priv *priv = container_of(soc_host,
1466                                                   struct rcar_vin_priv, ici);
1467
1468         soc_camera_host_unregister(soc_host);
1469         pm_runtime_disable(&pdev->dev);
1470         vb2_dma_contig_cleanup_ctx(priv->alloc_ctx);
1471
1472         return 0;
1473 }
1474
1475 static struct platform_driver rcar_vin_driver = {
1476         .probe          = rcar_vin_probe,
1477         .remove         = rcar_vin_remove,
1478         .driver         = {
1479                 .name           = DRV_NAME,
1480                 .owner          = THIS_MODULE,
1481         },
1482         .id_table       = rcar_vin_id_table,
1483 };
1484
1485 module_platform_driver(rcar_vin_driver);
1486
1487 MODULE_LICENSE("GPL");
1488 MODULE_ALIAS("platform:rcar_vin");
1489 MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver");