Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

Linux/drivers/media/platform/davinci/vpif_capture.c

  1 /*
  2  * Copyright (C) 2009 Texas Instruments Inc
  3  * Copyright (C) 2014 Lad, Prabhakar <prabhakar.csengg@gmail.com>
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License as published by
  7  * the Free Software Foundation; either version 2 of the License, or
  8  * (at your option) any later version.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program; if not, write to the Free Software
 17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 18  *
 19  * TODO : add support for VBI & HBI data service
 20  *        add static buffer allocation
 21  */
 22 
 23 #include <linux/module.h>
 24 #include <linux/interrupt.h>
 25 #include <linux/platform_device.h>
 26 #include <linux/slab.h>
 27 
 28 #include <media/v4l2-ioctl.h>
 29 
 30 #include "vpif.h"
 31 #include "vpif_capture.h"
 32 
 33 MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
 34 MODULE_LICENSE("GPL");
 35 MODULE_VERSION(VPIF_CAPTURE_VERSION);
 36 
 37 #define vpif_err(fmt, arg...)   v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
 38 #define vpif_dbg(level, debug, fmt, arg...)     \
 39                 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
 40 
 41 static int debug = 1;
 42 
 43 module_param(debug, int, 0644);
 44 
 45 MODULE_PARM_DESC(debug, "Debug level 0-1");
 46 
 47 #define VPIF_DRIVER_NAME        "vpif_capture"
 48 
 49 /* global variables */
 50 static struct vpif_device vpif_obj = { {NULL} };
 51 static struct device *vpif_dev;
 52 static void vpif_calculate_offsets(struct channel_obj *ch);
 53 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
 54 
 55 static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] = { {1, 1} };
 56 
 57 /* Is set to 1 in case of SDTV formats, 2 in case of HDTV formats. */
 58 static int ycmux_mode;
 59 
 60 static inline struct vpif_cap_buffer *to_vpif_buffer(struct vb2_buffer *vb)
 61 {
 62         return container_of(vb, struct vpif_cap_buffer, vb);
 63 }
 64 
 65 /**
 66  * vpif_buffer_prepare :  callback function for buffer prepare
 67  * @vb: ptr to vb2_buffer
 68  *
 69  * This is the callback function for buffer prepare when vb2_qbuf()
 70  * function is called. The buffer is prepared and user space virtual address
 71  * or user address is converted into  physical address
 72  */
 73 static int vpif_buffer_prepare(struct vb2_buffer *vb)
 74 {
 75         struct vb2_queue *q = vb->vb2_queue;
 76         struct channel_obj *ch = vb2_get_drv_priv(q);
 77         struct common_obj *common;
 78         unsigned long addr;
 79 
 80         vpif_dbg(2, debug, "vpif_buffer_prepare\n");
 81 
 82         common = &ch->common[VPIF_VIDEO_INDEX];
 83 
 84         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
 85         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 86                 return -EINVAL;
 87 
 88         vb->v4l2_buf.field = common->fmt.fmt.pix.field;
 89 
 90         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 91         if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
 92                 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
 93                 !IS_ALIGNED((addr + common->ctop_off), 8) ||
 94                 !IS_ALIGNED((addr + common->cbtm_off), 8)) {
 95                 vpif_dbg(1, debug, "offset is not aligned\n");
 96                 return -EINVAL;
 97         }
 98 
 99         return 0;
100 }
101 
102 /**
103  * vpif_buffer_queue_setup : Callback function for buffer setup.
104  * @vq: vb2_queue ptr
105  * @fmt: v4l2 format
106  * @nbuffers: ptr to number of buffers requested by application
107  * @nplanes:: contains number of distinct video planes needed to hold a frame
108  * @sizes[]: contains the size (in bytes) of each plane.
109  * @alloc_ctxs: ptr to allocation context
110  *
111  * This callback function is called when reqbuf() is called to adjust
112  * the buffer count and buffer size
113  */
114 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
115                                 const struct v4l2_format *fmt,
116                                 unsigned int *nbuffers, unsigned int *nplanes,
117                                 unsigned int sizes[], void *alloc_ctxs[])
118 {
119         struct channel_obj *ch = vb2_get_drv_priv(vq);
120         struct common_obj *common;
121 
122         common = &ch->common[VPIF_VIDEO_INDEX];
123 
124         vpif_dbg(2, debug, "vpif_buffer_setup\n");
125 
126         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
127                 return -EINVAL;
128 
129         if (vq->num_buffers + *nbuffers < 3)
130                 *nbuffers = 3 - vq->num_buffers;
131 
132         *nplanes = 1;
133         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
134         alloc_ctxs[0] = common->alloc_ctx;
135 
136         /* Calculate the offset for Y and C data in the buffer */
137         vpif_calculate_offsets(ch);
138 
139         return 0;
140 }
141 
142 /**
143  * vpif_buffer_queue : Callback function to add buffer to DMA queue
144  * @vb: ptr to vb2_buffer
145  */
146 static void vpif_buffer_queue(struct vb2_buffer *vb)
147 {
148         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
149         struct vpif_cap_buffer *buf = to_vpif_buffer(vb);
150         struct common_obj *common;
151         unsigned long flags;
152 
153         common = &ch->common[VPIF_VIDEO_INDEX];
154 
155         vpif_dbg(2, debug, "vpif_buffer_queue\n");
156 
157         spin_lock_irqsave(&common->irqlock, flags);
158         /* add the buffer to the DMA queue */
159         list_add_tail(&buf->list, &common->dma_queue);
160         spin_unlock_irqrestore(&common->irqlock, flags);
161 }
162 
163 /**
164  * vpif_start_streaming : Starts the DMA engine for streaming
165  * @vb: ptr to vb2_buffer
166  * @count: number of buffers
167  */
168 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
169 {
170         struct vpif_capture_config *vpif_config_data =
171                                         vpif_dev->platform_data;
172         struct channel_obj *ch = vb2_get_drv_priv(vq);
173         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
174         struct vpif_params *vpif = &ch->vpifparams;
175         struct vpif_cap_buffer *buf, *tmp;
176         unsigned long addr, flags;
177         int ret;
178 
179         spin_lock_irqsave(&common->irqlock, flags);
180 
181         /* Initialize field_id */
182         ch->field_id = 0;
183 
184         /* configure 1 or 2 channel mode */
185         if (vpif_config_data->setup_input_channel_mode) {
186                 ret = vpif_config_data->
187                         setup_input_channel_mode(vpif->std_info.ycmux_mode);
188                 if (ret < 0) {
189                         vpif_dbg(1, debug, "can't set vpif channel mode\n");
190                         goto err;
191                 }
192         }
193 
194         ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
195         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
196                 vpif_dbg(1, debug, "stream on failed in subdev\n");
197                 goto err;
198         }
199 
200         /* Call vpif_set_params function to set the parameters and addresses */
201         ret = vpif_set_video_params(vpif, ch->channel_id);
202         if (ret < 0) {
203                 vpif_dbg(1, debug, "can't set video params\n");
204                 goto err;
205         }
206 
207         ycmux_mode = ret;
208         vpif_config_addr(ch, ret);
209 
210         /* Get the next frame from the buffer queue */
211         common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
212                                     struct vpif_cap_buffer, list);
213         /* Remove buffer from the buffer queue */
214         list_del(&common->cur_frm->list);
215         spin_unlock_irqrestore(&common->irqlock, flags);
216 
217         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
218 
219         common->set_addr(addr + common->ytop_off,
220                          addr + common->ybtm_off,
221                          addr + common->ctop_off,
222                          addr + common->cbtm_off);
223 
224         /**
225          * Set interrupt for both the fields in VPIF Register enable channel in
226          * VPIF register
227          */
228         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
229         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
230                 channel0_intr_assert();
231                 channel0_intr_enable(1);
232                 enable_channel0(1);
233         }
234         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
235                 ycmux_mode == 2) {
236                 channel1_intr_assert();
237                 channel1_intr_enable(1);
238                 enable_channel1(1);
239         }
240 
241         return 0;
242 
243 err:
244         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
245                 list_del(&buf->list);
246                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
247         }
248         spin_unlock_irqrestore(&common->irqlock, flags);
249 
250         return ret;
251 }
252 
253 /**
254  * vpif_stop_streaming : Stop the DMA engine
255  * @vq: ptr to vb2_queue
256  *
257  * This callback stops the DMA engine and any remaining buffers
258  * in the DMA queue are released.
259  */
260 static void vpif_stop_streaming(struct vb2_queue *vq)
261 {
262         struct channel_obj *ch = vb2_get_drv_priv(vq);
263         struct common_obj *common;
264         unsigned long flags;
265         int ret;
266 
267         common = &ch->common[VPIF_VIDEO_INDEX];
268 
269         /* Disable channel as per its device type and channel id */
270         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
271                 enable_channel0(0);
272                 channel0_intr_enable(0);
273         }
274         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
275                 ycmux_mode == 2) {
276                 enable_channel1(0);
277                 channel1_intr_enable(0);
278         }
279 
280         ycmux_mode = 0;
281 
282         ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
283         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
284                 vpif_dbg(1, debug, "stream off failed in subdev\n");
285 
286         /* release all active buffers */
287         spin_lock_irqsave(&common->irqlock, flags);
288         if (common->cur_frm == common->next_frm) {
289                 vb2_buffer_done(&common->cur_frm->vb, VB2_BUF_STATE_ERROR);
290         } else {
291                 if (common->cur_frm != NULL)
292                         vb2_buffer_done(&common->cur_frm->vb,
293                                         VB2_BUF_STATE_ERROR);
294                 if (common->next_frm != NULL)
295                         vb2_buffer_done(&common->next_frm->vb,
296                                         VB2_BUF_STATE_ERROR);
297         }
298 
299         while (!list_empty(&common->dma_queue)) {
300                 common->next_frm = list_entry(common->dma_queue.next,
301                                                 struct vpif_cap_buffer, list);
302                 list_del(&common->next_frm->list);
303                 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
304         }
305         spin_unlock_irqrestore(&common->irqlock, flags);
306 }
307 
308 static struct vb2_ops video_qops = {
309         .queue_setup            = vpif_buffer_queue_setup,
310         .buf_prepare            = vpif_buffer_prepare,
311         .start_streaming        = vpif_start_streaming,
312         .stop_streaming         = vpif_stop_streaming,
313         .buf_queue              = vpif_buffer_queue,
314         .wait_prepare           = vb2_ops_wait_prepare,
315         .wait_finish            = vb2_ops_wait_finish,
316 };
317 
318 /**
319  * vpif_process_buffer_complete: process a completed buffer
320  * @common: ptr to common channel object
321  *
322  * This function time stamp the buffer and mark it as DONE. It also
323  * wake up any process waiting on the QUEUE and set the next buffer
324  * as current
325  */
326 static void vpif_process_buffer_complete(struct common_obj *common)
327 {
328         v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
329         vb2_buffer_done(&common->cur_frm->vb,
330                                             VB2_BUF_STATE_DONE);
331         /* Make curFrm pointing to nextFrm */
332         common->cur_frm = common->next_frm;
333 }
334 
335 /**
336  * vpif_schedule_next_buffer: set next buffer address for capture
337  * @common : ptr to common channel object
338  *
339  * This function will get next buffer from the dma queue and
340  * set the buffer address in the vpif register for capture.
341  * the buffer is marked active
342  */
343 static void vpif_schedule_next_buffer(struct common_obj *common)
344 {
345         unsigned long addr = 0;
346 
347         spin_lock(&common->irqlock);
348         common->next_frm = list_entry(common->dma_queue.next,
349                                      struct vpif_cap_buffer, list);
350         /* Remove that buffer from the buffer queue */
351         list_del(&common->next_frm->list);
352         spin_unlock(&common->irqlock);
353         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
354 
355         /* Set top and bottom field addresses in VPIF registers */
356         common->set_addr(addr + common->ytop_off,
357                          addr + common->ybtm_off,
358                          addr + common->ctop_off,
359                          addr + common->cbtm_off);
360 }
361 
362 /**
363  * vpif_channel_isr : ISR handler for vpif capture
364  * @irq: irq number
365  * @dev_id: dev_id ptr
366  *
367  * It changes status of the captured buffer, takes next buffer from the queue
368  * and sets its address in VPIF registers
369  */
370 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
371 {
372         struct vpif_device *dev = &vpif_obj;
373         struct common_obj *common;
374         struct channel_obj *ch;
375         int channel_id = 0;
376         int fid = -1, i;
377 
378         channel_id = *(int *)(dev_id);
379         if (!vpif_intr_status(channel_id))
380                 return IRQ_NONE;
381 
382         ch = dev->dev[channel_id];
383 
384         for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
385                 common = &ch->common[i];
386                 /* skip If streaming is not started in this channel */
387                 /* Check the field format */
388                 if (1 == ch->vpifparams.std_info.frm_fmt) {
389                         /* Progressive mode */
390                         spin_lock(&common->irqlock);
391                         if (list_empty(&common->dma_queue)) {
392                                 spin_unlock(&common->irqlock);
393                                 continue;
394                         }
395                         spin_unlock(&common->irqlock);
396 
397                         if (!channel_first_int[i][channel_id])
398                                 vpif_process_buffer_complete(common);
399 
400                         channel_first_int[i][channel_id] = 0;
401 
402                         vpif_schedule_next_buffer(common);
403 
404 
405                         channel_first_int[i][channel_id] = 0;
406                 } else {
407                         /**
408                          * Interlaced mode. If it is first interrupt, ignore
409                          * it
410                          */
411                         if (channel_first_int[i][channel_id]) {
412                                 channel_first_int[i][channel_id] = 0;
413                                 continue;
414                         }
415                         if (0 == i) {
416                                 ch->field_id ^= 1;
417                                 /* Get field id from VPIF registers */
418                                 fid = vpif_channel_getfid(ch->channel_id);
419                                 if (fid != ch->field_id) {
420                                         /**
421                                          * If field id does not match stored
422                                          * field id, make them in sync
423                                          */
424                                         if (0 == fid)
425                                                 ch->field_id = fid;
426                                         return IRQ_HANDLED;
427                                 }
428                         }
429                         /* device field id and local field id are in sync */
430                         if (0 == fid) {
431                                 /* this is even field */
432                                 if (common->cur_frm == common->next_frm)
433                                         continue;
434 
435                                 /* mark the current buffer as done */
436                                 vpif_process_buffer_complete(common);
437                         } else if (1 == fid) {
438                                 /* odd field */
439                                 spin_lock(&common->irqlock);
440                                 if (list_empty(&common->dma_queue) ||
441                                     (common->cur_frm != common->next_frm)) {
442                                         spin_unlock(&common->irqlock);
443                                         continue;
444                                 }
445                                 spin_unlock(&common->irqlock);
446 
447                                 vpif_schedule_next_buffer(common);
448                         }
449                 }
450         }
451         return IRQ_HANDLED;
452 }
453 
454 /**
455  * vpif_update_std_info() - update standard related info
456  * @ch: ptr to channel object
457  *
458  * For a given standard selected by application, update values
459  * in the device data structures
460  */
461 static int vpif_update_std_info(struct channel_obj *ch)
462 {
463         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
464         struct vpif_params *vpifparams = &ch->vpifparams;
465         const struct vpif_channel_config_params *config;
466         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
467         struct video_obj *vid_ch = &ch->video;
468         int index;
469 
470         vpif_dbg(2, debug, "vpif_update_std_info\n");
471 
472         for (index = 0; index < vpif_ch_params_count; index++) {
473                 config = &vpif_ch_params[index];
474                 if (config->hd_sd == 0) {
475                         vpif_dbg(2, debug, "SD format\n");
476                         if (config->stdid & vid_ch->stdid) {
477                                 memcpy(std_info, config, sizeof(*config));
478                                 break;
479                         }
480                 } else {
481                         vpif_dbg(2, debug, "HD format\n");
482                         if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
483                                 sizeof(vid_ch->dv_timings))) {
484                                 memcpy(std_info, config, sizeof(*config));
485                                 break;
486                         }
487                 }
488         }
489 
490         /* standard not found */
491         if (index == vpif_ch_params_count)
492                 return -EINVAL;
493 
494         common->fmt.fmt.pix.width = std_info->width;
495         common->width = std_info->width;
496         common->fmt.fmt.pix.height = std_info->height;
497         common->height = std_info->height;
498         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
499         common->fmt.fmt.pix.bytesperline = std_info->width;
500         vpifparams->video_params.hpitch = std_info->width;
501         vpifparams->video_params.storage_mode = std_info->frm_fmt;
502 
503         if (vid_ch->stdid)
504                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
505         else
506                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
507 
508         if (ch->vpifparams.std_info.frm_fmt)
509                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
510         else
511                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
512 
513         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
514                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
515         else
516                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
517 
518         common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
519 
520         return 0;
521 }
522 
523 /**
524  * vpif_calculate_offsets : This function calculates buffers offsets
525  * @ch : ptr to channel object
526  *
527  * This function calculates buffer offsets for Y and C in the top and
528  * bottom field
529  */
530 static void vpif_calculate_offsets(struct channel_obj *ch)
531 {
532         unsigned int hpitch, sizeimage;
533         struct video_obj *vid_ch = &(ch->video);
534         struct vpif_params *vpifparams = &ch->vpifparams;
535         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
536         enum v4l2_field field = common->fmt.fmt.pix.field;
537 
538         vpif_dbg(2, debug, "vpif_calculate_offsets\n");
539 
540         if (V4L2_FIELD_ANY == field) {
541                 if (vpifparams->std_info.frm_fmt)
542                         vid_ch->buf_field = V4L2_FIELD_NONE;
543                 else
544                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
545         } else
546                 vid_ch->buf_field = common->fmt.fmt.pix.field;
547 
548         sizeimage = common->fmt.fmt.pix.sizeimage;
549 
550         hpitch = common->fmt.fmt.pix.bytesperline;
551 
552         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
553             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
554                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
555                 common->ytop_off = 0;
556                 common->ybtm_off = hpitch;
557                 common->ctop_off = sizeimage / 2;
558                 common->cbtm_off = sizeimage / 2 + hpitch;
559         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
560                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
561                 common->ytop_off = 0;
562                 common->ybtm_off = sizeimage / 4;
563                 common->ctop_off = sizeimage / 2;
564                 common->cbtm_off = common->ctop_off + sizeimage / 4;
565         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
566                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
567                 common->ybtm_off = 0;
568                 common->ytop_off = sizeimage / 4;
569                 common->cbtm_off = sizeimage / 2;
570                 common->ctop_off = common->cbtm_off + sizeimage / 4;
571         }
572         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
573             (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
574                 vpifparams->video_params.storage_mode = 1;
575         else
576                 vpifparams->video_params.storage_mode = 0;
577 
578         if (1 == vpifparams->std_info.frm_fmt)
579                 vpifparams->video_params.hpitch =
580                     common->fmt.fmt.pix.bytesperline;
581         else {
582                 if ((field == V4L2_FIELD_ANY)
583                     || (field == V4L2_FIELD_INTERLACED))
584                         vpifparams->video_params.hpitch =
585                             common->fmt.fmt.pix.bytesperline * 2;
586                 else
587                         vpifparams->video_params.hpitch =
588                             common->fmt.fmt.pix.bytesperline;
589         }
590 
591         ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
592 }
593 
594 /**
595  * vpif_get_default_field() - Get default field type based on interface
596  * @vpif_params - ptr to vpif params
597  */
598 static inline enum v4l2_field vpif_get_default_field(
599                                 struct vpif_interface *iface)
600 {
601         return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
602                                                 V4L2_FIELD_INTERLACED;
603 }
604 
605 /**
606  * vpif_config_addr() - function to configure buffer address in vpif
607  * @ch - channel ptr
608  * @muxmode - channel mux mode
609  */
610 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
611 {
612         struct common_obj *common;
613 
614         vpif_dbg(2, debug, "vpif_config_addr\n");
615 
616         common = &(ch->common[VPIF_VIDEO_INDEX]);
617 
618         if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
619                 common->set_addr = ch1_set_videobuf_addr;
620         else if (2 == muxmode)
621                 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
622         else
623                 common->set_addr = ch0_set_videobuf_addr;
624 }
625 
626 /**
627  * vpif_input_to_subdev() - Maps input to sub device
628  * @vpif_cfg - global config ptr
629  * @chan_cfg - channel config ptr
630  * @input_index - Given input index from application
631  *
632  * lookup the sub device information for a given input index.
633  * we report all the inputs to application. inputs table also
634  * has sub device name for the each input
635  */
636 static int vpif_input_to_subdev(
637                 struct vpif_capture_config *vpif_cfg,
638                 struct vpif_capture_chan_config *chan_cfg,
639                 int input_index)
640 {
641         struct vpif_subdev_info *subdev_info;
642         const char *subdev_name;
643         int i;
644 
645         vpif_dbg(2, debug, "vpif_input_to_subdev\n");
646 
647         subdev_name = chan_cfg->inputs[input_index].subdev_name;
648         if (subdev_name == NULL)
649                 return -1;
650 
651         /* loop through the sub device list to get the sub device info */
652         for (i = 0; i < vpif_cfg->subdev_count; i++) {
653                 subdev_info = &vpif_cfg->subdev_info[i];
654                 if (!strcmp(subdev_info->name, subdev_name))
655                         return i;
656         }
657         return -1;
658 }
659 
660 /**
661  * vpif_set_input() - Select an input
662  * @vpif_cfg - global config ptr
663  * @ch - channel
664  * @_index - Given input index from application
665  *
666  * Select the given input.
667  */
668 static int vpif_set_input(
669                 struct vpif_capture_config *vpif_cfg,
670                 struct channel_obj *ch,
671                 int index)
672 {
673         struct vpif_capture_chan_config *chan_cfg =
674                         &vpif_cfg->chan_config[ch->channel_id];
675         struct vpif_subdev_info *subdev_info = NULL;
676         struct v4l2_subdev *sd = NULL;
677         u32 input = 0, output = 0;
678         int sd_index;
679         int ret;
680 
681         sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
682         if (sd_index >= 0) {
683                 sd = vpif_obj.sd[sd_index];
684                 subdev_info = &vpif_cfg->subdev_info[sd_index];
685         }
686 
687         /* first setup input path from sub device to vpif */
688         if (sd && vpif_cfg->setup_input_path) {
689                 ret = vpif_cfg->setup_input_path(ch->channel_id,
690                                        subdev_info->name);
691                 if (ret < 0) {
692                         vpif_dbg(1, debug, "couldn't setup input path for the" \
693                         " sub device %s, for input index %d\n",
694                         subdev_info->name, index);
695                         return ret;
696                 }
697         }
698 
699         if (sd) {
700                 input = chan_cfg->inputs[index].input_route;
701                 output = chan_cfg->inputs[index].output_route;
702                 ret = v4l2_subdev_call(sd, video, s_routing,
703                                 input, output, 0);
704                 if (ret < 0 && ret != -ENOIOCTLCMD) {
705                         vpif_dbg(1, debug, "Failed to set input\n");
706                         return ret;
707                 }
708         }
709         ch->input_idx = index;
710         ch->sd = sd;
711         /* copy interface parameters to vpif */
712         ch->vpifparams.iface = chan_cfg->vpif_if;
713 
714         /* update tvnorms from the sub device input info */
715         ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
716         return 0;
717 }
718 
719 /**
720  * vpif_querystd() - querystd handler
721  * @file: file ptr
722  * @priv: file handle
723  * @std_id: ptr to std id
724  *
725  * This function is called to detect standard at the selected input
726  */
727 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
728 {
729         struct video_device *vdev = video_devdata(file);
730         struct channel_obj *ch = video_get_drvdata(vdev);
731         int ret = 0;
732 
733         vpif_dbg(2, debug, "vpif_querystd\n");
734 
735         /* Call querystd function of decoder device */
736         ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
737 
738         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
739                 return -ENODATA;
740         if (ret) {
741                 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
742                 return ret;
743         }
744 
745         return 0;
746 }
747 
748 /**
749  * vpif_g_std() - get STD handler
750  * @file: file ptr
751  * @priv: file handle
752  * @std_id: ptr to std id
753  */
754 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
755 {
756         struct vpif_capture_config *config = vpif_dev->platform_data;
757         struct video_device *vdev = video_devdata(file);
758         struct channel_obj *ch = video_get_drvdata(vdev);
759         struct vpif_capture_chan_config *chan_cfg;
760         struct v4l2_input input;
761 
762         vpif_dbg(2, debug, "vpif_g_std\n");
763 
764         if (config->chan_config[ch->channel_id].inputs == NULL)
765                 return -ENODATA;
766 
767         chan_cfg = &config->chan_config[ch->channel_id];
768         input = chan_cfg->inputs[ch->input_idx].input;
769         if (input.capabilities != V4L2_IN_CAP_STD)
770                 return -ENODATA;
771 
772         *std = ch->video.stdid;
773         return 0;
774 }
775 
776 /**
777  * vpif_s_std() - set STD handler
778  * @file: file ptr
779  * @priv: file handle
780  * @std_id: ptr to std id
781  */
782 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
783 {
784         struct vpif_capture_config *config = vpif_dev->platform_data;
785         struct video_device *vdev = video_devdata(file);
786         struct channel_obj *ch = video_get_drvdata(vdev);
787         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
788         struct vpif_capture_chan_config *chan_cfg;
789         struct v4l2_input input;
790         int ret;
791 
792         vpif_dbg(2, debug, "vpif_s_std\n");
793 
794         if (config->chan_config[ch->channel_id].inputs == NULL)
795                 return -ENODATA;
796 
797         chan_cfg = &config->chan_config[ch->channel_id];
798         input = chan_cfg->inputs[ch->input_idx].input;
799         if (input.capabilities != V4L2_IN_CAP_STD)
800                 return -ENODATA;
801 
802         if (vb2_is_busy(&common->buffer_queue))
803                 return -EBUSY;
804 
805         /* Call encoder subdevice function to set the standard */
806         ch->video.stdid = std_id;
807         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
808 
809         /* Get the information about the standard */
810         if (vpif_update_std_info(ch)) {
811                 vpif_err("Error getting the standard info\n");
812                 return -EINVAL;
813         }
814 
815         /* set standard in the sub device */
816         ret = v4l2_subdev_call(ch->sd, video, s_std, std_id);
817         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
818                 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
819                 return ret;
820         }
821         return 0;
822 }
823 
824 /**
825  * vpif_enum_input() - ENUMINPUT handler
826  * @file: file ptr
827  * @priv: file handle
828  * @input: ptr to input structure
829  */
830 static int vpif_enum_input(struct file *file, void *priv,
831                                 struct v4l2_input *input)
832 {
833 
834         struct vpif_capture_config *config = vpif_dev->platform_data;
835         struct video_device *vdev = video_devdata(file);
836         struct channel_obj *ch = video_get_drvdata(vdev);
837         struct vpif_capture_chan_config *chan_cfg;
838 
839         chan_cfg = &config->chan_config[ch->channel_id];
840 
841         if (input->index >= chan_cfg->input_count)
842                 return -EINVAL;
843 
844         memcpy(input, &chan_cfg->inputs[input->index].input,
845                 sizeof(*input));
846         return 0;
847 }
848 
849 /**
850  * vpif_g_input() - Get INPUT handler
851  * @file: file ptr
852  * @priv: file handle
853  * @index: ptr to input index
854  */
855 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
856 {
857         struct video_device *vdev = video_devdata(file);
858         struct channel_obj *ch = video_get_drvdata(vdev);
859 
860         *index = ch->input_idx;
861         return 0;
862 }
863 
864 /**
865  * vpif_s_input() - Set INPUT handler
866  * @file: file ptr
867  * @priv: file handle
868  * @index: input index
869  */
870 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
871 {
872         struct vpif_capture_config *config = vpif_dev->platform_data;
873         struct video_device *vdev = video_devdata(file);
874         struct channel_obj *ch = video_get_drvdata(vdev);
875         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
876         struct vpif_capture_chan_config *chan_cfg;
877 
878         chan_cfg = &config->chan_config[ch->channel_id];
879 
880         if (index >= chan_cfg->input_count)
881                 return -EINVAL;
882 
883         if (vb2_is_busy(&common->buffer_queue))
884                 return -EBUSY;
885 
886         return vpif_set_input(config, ch, index);
887 }
888 
889 /**
890  * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
891  * @file: file ptr
892  * @priv: file handle
893  * @index: input index
894  */
895 static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
896                                         struct v4l2_fmtdesc *fmt)
897 {
898         struct video_device *vdev = video_devdata(file);
899         struct channel_obj *ch = video_get_drvdata(vdev);
900 
901         if (fmt->index != 0) {
902                 vpif_dbg(1, debug, "Invalid format index\n");
903                 return -EINVAL;
904         }
905 
906         /* Fill in the information about format */
907         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
908                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
909                 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
910                 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
911         } else {
912                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
913                 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
914                 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
915         }
916         return 0;
917 }
918 
919 /**
920  * vpif_try_fmt_vid_cap() - TRY_FMT handler
921  * @file: file ptr
922  * @priv: file handle
923  * @fmt: ptr to v4l2 format structure
924  */
925 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
926                                 struct v4l2_format *fmt)
927 {
928         struct video_device *vdev = video_devdata(file);
929         struct channel_obj *ch = video_get_drvdata(vdev);
930         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
931         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
932         struct vpif_params *vpif_params = &ch->vpifparams;
933 
934         /*
935          * to supress v4l-compliance warnings silently correct
936          * the pixelformat
937          */
938         if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
939                 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8)
940                         pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
941         } else {
942                 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
943                         pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
944         }
945 
946         common->fmt.fmt.pix.pixelformat = pixfmt->pixelformat;
947 
948         vpif_update_std_info(ch);
949 
950         pixfmt->field = common->fmt.fmt.pix.field;
951         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
952         pixfmt->bytesperline = common->fmt.fmt.pix.width;
953         pixfmt->width = common->fmt.fmt.pix.width;
954         pixfmt->height = common->fmt.fmt.pix.height;
955         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
956         pixfmt->priv = 0;
957 
958         return 0;
959 }
960 
961 
962 /**
963  * vpif_g_fmt_vid_cap() - Set INPUT handler
964  * @file: file ptr
965  * @priv: file handle
966  * @fmt: ptr to v4l2 format structure
967  */
968 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
969                                 struct v4l2_format *fmt)
970 {
971         struct video_device *vdev = video_devdata(file);
972         struct channel_obj *ch = video_get_drvdata(vdev);
973         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
974 
975         /* Check the validity of the buffer type */
976         if (common->fmt.type != fmt->type)
977                 return -EINVAL;
978 
979         /* Fill in the information about format */
980         *fmt = common->fmt;
981         return 0;
982 }
983 
984 /**
985  * vpif_s_fmt_vid_cap() - Set FMT handler
986  * @file: file ptr
987  * @priv: file handle
988  * @fmt: ptr to v4l2 format structure
989  */
990 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
991                                 struct v4l2_format *fmt)
992 {
993         struct video_device *vdev = video_devdata(file);
994         struct channel_obj *ch = video_get_drvdata(vdev);
995         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
996         int ret;
997 
998         vpif_dbg(2, debug, "%s\n", __func__);
999 
1000         if (vb2_is_busy(&common->buffer_queue))
1001                 return -EBUSY;
1002 
1003         ret = vpif_try_fmt_vid_cap(file, priv, fmt);
1004         if (ret)
1005                 return ret;
1006 
1007         /* store the format in the channel object */
1008         common->fmt = *fmt;
1009         return 0;
1010 }
1011 
1012 /**
1013  * vpif_querycap() - QUERYCAP handler
1014  * @file: file ptr
1015  * @priv: file handle
1016  * @cap: ptr to v4l2_capability structure
1017  */
1018 static int vpif_querycap(struct file *file, void  *priv,
1019                                 struct v4l2_capability *cap)
1020 {
1021         struct vpif_capture_config *config = vpif_dev->platform_data;
1022 
1023         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1024         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1025         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
1026         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1027                  dev_name(vpif_dev));
1028         strlcpy(cap->card, config->card_name, sizeof(cap->card));
1029 
1030         return 0;
1031 }
1032 
1033 /**
1034  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1035  * @file: file ptr
1036  * @priv: file handle
1037  * @timings: input timings
1038  */
1039 static int
1040 vpif_enum_dv_timings(struct file *file, void *priv,
1041                      struct v4l2_enum_dv_timings *timings)
1042 {
1043         struct vpif_capture_config *config = vpif_dev->platform_data;
1044         struct video_device *vdev = video_devdata(file);
1045         struct channel_obj *ch = video_get_drvdata(vdev);
1046         struct vpif_capture_chan_config *chan_cfg;
1047         struct v4l2_input input;
1048         int ret;
1049 
1050         if (config->chan_config[ch->channel_id].inputs == NULL)
1051                 return -ENODATA;
1052 
1053         chan_cfg = &config->chan_config[ch->channel_id];
1054         input = chan_cfg->inputs[ch->input_idx].input;
1055         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1056                 return -ENODATA;
1057 
1058         timings->pad = 0;
1059 
1060         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
1061         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1062                 return -EINVAL;
1063 
1064         return ret;
1065 }
1066 
1067 /**
1068  * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1069  * @file: file ptr
1070  * @priv: file handle
1071  * @timings: input timings
1072  */
1073 static int
1074 vpif_query_dv_timings(struct file *file, void *priv,
1075                       struct v4l2_dv_timings *timings)
1076 {
1077         struct vpif_capture_config *config = vpif_dev->platform_data;
1078         struct video_device *vdev = video_devdata(file);
1079         struct channel_obj *ch = video_get_drvdata(vdev);
1080         struct vpif_capture_chan_config *chan_cfg;
1081         struct v4l2_input input;
1082         int ret;
1083 
1084         if (config->chan_config[ch->channel_id].inputs == NULL)
1085                 return -ENODATA;
1086 
1087         chan_cfg = &config->chan_config[ch->channel_id];
1088         input = chan_cfg->inputs[ch->input_idx].input;
1089         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1090                 return -ENODATA;
1091 
1092         ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1093         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1094                 return -ENODATA;
1095 
1096         return ret;
1097 }
1098 
1099 /**
1100  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1101  * @file: file ptr
1102  * @priv: file handle
1103  * @timings: digital video timings
1104  */
1105 static int vpif_s_dv_timings(struct file *file, void *priv,
1106                 struct v4l2_dv_timings *timings)
1107 {
1108         struct vpif_capture_config *config = vpif_dev->platform_data;
1109         struct video_device *vdev = video_devdata(file);
1110         struct channel_obj *ch = video_get_drvdata(vdev);
1111         struct vpif_params *vpifparams = &ch->vpifparams;
1112         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1113         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1114         struct video_obj *vid_ch = &ch->video;
1115         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1116         struct vpif_capture_chan_config *chan_cfg;
1117         struct v4l2_input input;
1118         int ret;
1119 
1120         if (config->chan_config[ch->channel_id].inputs == NULL)
1121                 return -ENODATA;
1122 
1123         chan_cfg = &config->chan_config[ch->channel_id];
1124         input = chan_cfg->inputs[ch->input_idx].input;
1125         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1126                 return -ENODATA;
1127 
1128         if (timings->type != V4L2_DV_BT_656_1120) {
1129                 vpif_dbg(2, debug, "Timing type not defined\n");
1130                 return -EINVAL;
1131         }
1132 
1133         if (vb2_is_busy(&common->buffer_queue))
1134                 return -EBUSY;
1135 
1136         /* Configure subdevice timings, if any */
1137         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1138         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1139                 ret = 0;
1140         if (ret < 0) {
1141                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1142                 return ret;
1143         }
1144 
1145         if (!(timings->bt.width && timings->bt.height &&
1146                                 (timings->bt.hbackporch ||
1147                                  timings->bt.hfrontporch ||
1148                                  timings->bt.hsync) &&
1149                                 timings->bt.vfrontporch &&
1150                                 (timings->bt.vbackporch ||
1151                                  timings->bt.vsync))) {
1152                 vpif_dbg(2, debug, "Timings for width, height, "
1153                                 "horizontal back porch, horizontal sync, "
1154                                 "horizontal front porch, vertical back porch, "
1155                                 "vertical sync and vertical back porch "
1156                                 "must be defined\n");
1157                 return -EINVAL;
1158         }
1159 
1160         vid_ch->dv_timings = *timings;
1161 
1162         /* Configure video port timings */
1163 
1164         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
1165         std_info->sav2eav = bt->width;
1166 
1167         std_info->l1 = 1;
1168         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1169 
1170         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
1171         if (bt->interlaced) {
1172                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1173                         std_info->l5 = std_info->vsize/2 -
1174                                 (bt->vfrontporch - 1);
1175                         std_info->l7 = std_info->vsize/2 + 1;
1176                         std_info->l9 = std_info->l7 + bt->il_vsync +
1177                                 bt->il_vbackporch + 1;
1178                         std_info->l11 = std_info->vsize -
1179                                 (bt->il_vfrontporch - 1);
1180                 } else {
1181                         vpif_dbg(2, debug, "Required timing values for "
1182                                         "interlaced BT format missing\n");
1183                         return -EINVAL;
1184                 }
1185         } else {
1186                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1187         }
1188         strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1189         std_info->width = bt->width;
1190         std_info->height = bt->height;
1191         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1192         std_info->ycmux_mode = 0;
1193         std_info->capture_format = 0;
1194         std_info->vbi_supported = 0;
1195         std_info->hd_sd = 1;
1196         std_info->stdid = 0;
1197 
1198         vid_ch->stdid = 0;
1199         return 0;
1200 }
1201 
1202 /**
1203  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1204  * @file: file ptr
1205  * @priv: file handle
1206  * @timings: digital video timings
1207  */
1208 static int vpif_g_dv_timings(struct file *file, void *priv,
1209                 struct v4l2_dv_timings *timings)
1210 {
1211         struct vpif_capture_config *config = vpif_dev->platform_data;
1212         struct video_device *vdev = video_devdata(file);
1213         struct channel_obj *ch = video_get_drvdata(vdev);
1214         struct video_obj *vid_ch = &ch->video;
1215         struct vpif_capture_chan_config *chan_cfg;
1216         struct v4l2_input input;
1217 
1218         if (config->chan_config[ch->channel_id].inputs == NULL)
1219                 return -ENODATA;
1220 
1221         chan_cfg = &config->chan_config[ch->channel_id];
1222         input = chan_cfg->inputs[ch->input_idx].input;
1223         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1224                 return -ENODATA;
1225 
1226         *timings = vid_ch->dv_timings;
1227 
1228         return 0;
1229 }
1230 
1231 /*
1232  * vpif_log_status() - Status information
1233  * @file: file ptr
1234  * @priv: file handle
1235  *
1236  * Returns zero.
1237  */
1238 static int vpif_log_status(struct file *filep, void *priv)
1239 {
1240         /* status for sub devices */
1241         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1242 
1243         return 0;
1244 }
1245 
1246 /* vpif capture ioctl operations */
1247 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1248         .vidioc_querycap                = vpif_querycap,
1249         .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1250         .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1251         .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1252         .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1253 
1254         .vidioc_enum_input              = vpif_enum_input,
1255         .vidioc_s_input                 = vpif_s_input,
1256         .vidioc_g_input                 = vpif_g_input,
1257 
1258         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1259         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1260         .vidioc_querybuf                = vb2_ioctl_querybuf,
1261         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1262         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1263         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1264         .vidioc_streamon                = vb2_ioctl_streamon,
1265         .vidioc_streamoff               = vb2_ioctl_streamoff,
1266 
1267         .vidioc_querystd                = vpif_querystd,
1268         .vidioc_s_std                   = vpif_s_std,
1269         .vidioc_g_std                   = vpif_g_std,
1270 
1271         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1272         .vidioc_query_dv_timings        = vpif_query_dv_timings,
1273         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1274         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1275 
1276         .vidioc_log_status              = vpif_log_status,
1277 };
1278 
1279 /* vpif file operations */
1280 static struct v4l2_file_operations vpif_fops = {
1281         .owner = THIS_MODULE,
1282         .open = v4l2_fh_open,
1283         .release = vb2_fop_release,
1284         .unlocked_ioctl = video_ioctl2,
1285         .mmap = vb2_fop_mmap,
1286         .poll = vb2_fop_poll
1287 };
1288 
1289 /**
1290  * initialize_vpif() - Initialize vpif data structures
1291  *
1292  * Allocate memory for data structures and initialize them
1293  */
1294 static int initialize_vpif(void)
1295 {
1296         int err, i, j;
1297         int free_channel_objects_index;
1298 
1299         /* Allocate memory for six channel objects */
1300         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1301                 vpif_obj.dev[i] =
1302                     kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1303                 /* If memory allocation fails, return error */
1304                 if (!vpif_obj.dev[i]) {
1305                         free_channel_objects_index = i;
1306                         err = -ENOMEM;
1307                         goto vpif_init_free_channel_objects;
1308                 }
1309         }
1310         return 0;
1311 
1312 vpif_init_free_channel_objects:
1313         for (j = 0; j < free_channel_objects_index; j++)
1314                 kfree(vpif_obj.dev[j]);
1315         return err;
1316 }
1317 
1318 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1319                             struct v4l2_subdev *subdev,
1320                             struct v4l2_async_subdev *asd)
1321 {
1322         int i;
1323 
1324         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1325                 if (!strcmp(vpif_obj.config->subdev_info[i].name,
1326                             subdev->name)) {
1327                         vpif_obj.sd[i] = subdev;
1328                         return 0;
1329                 }
1330 
1331         return -EINVAL;
1332 }
1333 
1334 static int vpif_probe_complete(void)
1335 {
1336         struct common_obj *common;
1337         struct video_device *vdev;
1338         struct channel_obj *ch;
1339         struct vb2_queue *q;
1340         int i, j, err, k;
1341 
1342         for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1343                 ch = vpif_obj.dev[j];
1344                 ch->channel_id = j;
1345                 common = &(ch->common[VPIF_VIDEO_INDEX]);
1346                 spin_lock_init(&common->irqlock);
1347                 mutex_init(&common->lock);
1348 
1349                 /* select input 0 */
1350                 err = vpif_set_input(vpif_obj.config, ch, 0);
1351                 if (err)
1352                         goto probe_out;
1353 
1354                 /* set initial format */
1355                 ch->video.stdid = V4L2_STD_525_60;
1356                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1357                 vpif_update_std_info(ch);
1358 
1359                 /* Initialize vb2 queue */
1360                 q = &common->buffer_queue;
1361                 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1362                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1363                 q->drv_priv = ch;
1364                 q->ops = &video_qops;
1365                 q->mem_ops = &vb2_dma_contig_memops;
1366                 q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1367                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1368                 q->min_buffers_needed = 1;
1369                 q->lock = &common->lock;
1370 
1371                 err = vb2_queue_init(q);
1372                 if (err) {
1373                         vpif_err("vpif_capture: vb2_queue_init() failed\n");
1374                         goto probe_out;
1375                 }
1376 
1377                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1378                 if (IS_ERR(common->alloc_ctx)) {
1379                         vpif_err("Failed to get the context\n");
1380                         err = PTR_ERR(common->alloc_ctx);
1381                         goto probe_out;
1382                 }
1383 
1384                 INIT_LIST_HEAD(&common->dma_queue);
1385 
1386                 /* Initialize the video_device structure */
1387                 vdev = ch->video_dev;
1388                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1389                 vdev->release = video_device_release;
1390                 vdev->fops = &vpif_fops;
1391                 vdev->ioctl_ops = &vpif_ioctl_ops;
1392                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1393                 vdev->vfl_dir = VFL_DIR_RX;
1394                 vdev->queue = q;
1395                 vdev->lock = &common->lock;
1396                 video_set_drvdata(ch->video_dev, ch);
1397                 err = video_register_device(vdev,
1398                                             VFL_TYPE_GRABBER, (j ? 1 : 0));
1399                 if (err)
1400                         goto probe_out;
1401         }
1402 
1403         v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
1404         return 0;
1405 
1406 probe_out:
1407         for (k = 0; k < j; k++) {
1408                 /* Get the pointer to the channel object */
1409                 ch = vpif_obj.dev[k];
1410                 common = &ch->common[k];
1411                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1412                 /* Unregister video device */
1413                 video_unregister_device(ch->video_dev);
1414         }
1415         kfree(vpif_obj.sd);
1416         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1417                 ch = vpif_obj.dev[i];
1418                 /* Note: does nothing if ch->video_dev == NULL */
1419                 video_device_release(ch->video_dev);
1420         }
1421         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1422 
1423         return err;
1424 }
1425 
1426 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1427 {
1428         return vpif_probe_complete();
1429 }
1430 
1431 /**
1432  * vpif_probe : This function probes the vpif capture driver
1433  * @pdev: platform device pointer
1434  *
1435  * This creates device entries by register itself to the V4L2 driver and
1436  * initializes fields of each channel objects
1437  */
1438 static __init int vpif_probe(struct platform_device *pdev)
1439 {
1440         struct vpif_subdev_info *subdevdata;
1441         int i, j, err;
1442         int res_idx = 0;
1443         struct i2c_adapter *i2c_adap;
1444         struct channel_obj *ch;
1445         struct video_device *vfd;
1446         struct resource *res;
1447         int subdev_count;
1448 
1449         vpif_dev = &pdev->dev;
1450 
1451         err = initialize_vpif();
1452         if (err) {
1453                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1454                 return err;
1455         }
1456 
1457         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1458         if (err) {
1459                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1460                 return err;
1461         }
1462 
1463         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1464                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1465                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1466                                         (void *)(&vpif_obj.dev[res_idx]->
1467                                         channel_id));
1468                 if (err) {
1469                         err = -EINVAL;
1470                         goto vpif_unregister;
1471                 }
1472                 res_idx++;
1473         }
1474 
1475         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1476                 /* Get the pointer to the channel object */
1477                 ch = vpif_obj.dev[i];
1478                 /* Allocate memory for video device */
1479                 vfd = video_device_alloc();
1480                 if (NULL == vfd) {
1481                         for (j = 0; j < i; j++) {
1482                                 ch = vpif_obj.dev[j];
1483                                 video_device_release(ch->video_dev);
1484                         }
1485                         err = -ENOMEM;
1486                         goto vpif_unregister;
1487                 }
1488 
1489                 /* Set video_dev to the video device */
1490                 ch->video_dev = vfd;
1491         }
1492 
1493         vpif_obj.config = pdev->dev.platform_data;
1494 
1495         subdev_count = vpif_obj.config->subdev_count;
1496         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1497                                 GFP_KERNEL);
1498         if (vpif_obj.sd == NULL) {
1499                 vpif_err("unable to allocate memory for subdevice pointers\n");
1500                 err = -ENOMEM;
1501                 goto vpif_sd_error;
1502         }
1503 
1504         if (!vpif_obj.config->asd_sizes) {
1505                 i2c_adap = i2c_get_adapter(1);
1506                 for (i = 0; i < subdev_count; i++) {
1507                         subdevdata = &vpif_obj.config->subdev_info[i];
1508                         vpif_obj.sd[i] =
1509                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1510                                                           i2c_adap,
1511                                                           &subdevdata->
1512                                                           board_info,
1513                                                           NULL);
1514 
1515                         if (!vpif_obj.sd[i]) {
1516                                 vpif_err("Error registering v4l2 subdevice\n");
1517                                 err = -ENODEV;
1518                                 goto probe_subdev_out;
1519                         }
1520                         v4l2_info(&vpif_obj.v4l2_dev,
1521                                   "registered sub device %s\n",
1522                                    subdevdata->name);
1523                 }
1524                 vpif_probe_complete();
1525         } else {
1526                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1527                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1528                 vpif_obj.notifier.bound = vpif_async_bound;
1529                 vpif_obj.notifier.complete = vpif_async_complete;
1530                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1531                                                    &vpif_obj.notifier);
1532                 if (err) {
1533                         vpif_err("Error registering async notifier\n");
1534                         err = -EINVAL;
1535                         goto probe_subdev_out;
1536                 }
1537         }
1538 
1539         return 0;
1540 
1541 probe_subdev_out:
1542         /* free sub devices memory */
1543         kfree(vpif_obj.sd);
1544 
1545 vpif_sd_error:
1546         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1547                 ch = vpif_obj.dev[i];
1548                 /* Note: does nothing if ch->video_dev == NULL */
1549                 video_device_release(ch->video_dev);
1550         }
1551 vpif_unregister:
1552         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1553 
1554         return err;
1555 }
1556 
1557 /**
1558  * vpif_remove() - driver remove handler
1559  * @device: ptr to platform device structure
1560  *
1561  * The vidoe device is unregistered
1562  */
1563 static int vpif_remove(struct platform_device *device)
1564 {
1565         struct common_obj *common;
1566         struct channel_obj *ch;
1567         int i;
1568 
1569         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1570 
1571         kfree(vpif_obj.sd);
1572         /* un-register device */
1573         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1574                 /* Get the pointer to the channel object */
1575                 ch = vpif_obj.dev[i];
1576                 common = &ch->common[VPIF_VIDEO_INDEX];
1577                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1578                 /* Unregister video device */
1579                 video_unregister_device(ch->video_dev);
1580                 kfree(vpif_obj.dev[i]);
1581         }
1582         return 0;
1583 }
1584 
1585 #ifdef CONFIG_PM_SLEEP
1586 /**
1587  * vpif_suspend: vpif device suspend
1588  */
1589 static int vpif_suspend(struct device *dev)
1590 {
1591 
1592         struct common_obj *common;
1593         struct channel_obj *ch;
1594         int i;
1595 
1596         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1597                 /* Get the pointer to the channel object */
1598                 ch = vpif_obj.dev[i];
1599                 common = &ch->common[VPIF_VIDEO_INDEX];
1600 
1601                 if (!vb2_start_streaming_called(&common->buffer_queue))
1602                         continue;
1603 
1604                 mutex_lock(&common->lock);
1605                 /* Disable channel */
1606                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1607                         enable_channel0(0);
1608                         channel0_intr_enable(0);
1609                 }
1610                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1611                         ycmux_mode == 2) {
1612                         enable_channel1(0);
1613                         channel1_intr_enable(0);
1614                 }
1615                 mutex_unlock(&common->lock);
1616         }
1617 
1618         return 0;
1619 }
1620 
1621 /*
1622  * vpif_resume: vpif device suspend
1623  */
1624 static int vpif_resume(struct device *dev)
1625 {
1626         struct common_obj *common;
1627         struct channel_obj *ch;
1628         int i;
1629 
1630         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1631                 /* Get the pointer to the channel object */
1632                 ch = vpif_obj.dev[i];
1633                 common = &ch->common[VPIF_VIDEO_INDEX];
1634 
1635                 if (!vb2_start_streaming_called(&common->buffer_queue))
1636                         continue;
1637 
1638                 mutex_lock(&common->lock);
1639                 /* Enable channel */
1640                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1641                         enable_channel0(1);
1642                         channel0_intr_enable(1);
1643                 }
1644                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1645                         ycmux_mode == 2) {
1646                         enable_channel1(1);
1647                         channel1_intr_enable(1);
1648                 }
1649                 mutex_unlock(&common->lock);
1650         }
1651 
1652         return 0;
1653 }
1654 #endif
1655 
1656 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1657 
1658 static __refdata struct platform_driver vpif_driver = {
1659         .driver = {
1660                 .name   = VPIF_DRIVER_NAME,
1661                 .pm     = &vpif_pm_ops,
1662         },
1663         .probe = vpif_probe,
1664         .remove = vpif_remove,
1665 };
1666 
1667 module_platform_driver(vpif_driver);
1668 

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