Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6

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
 61 struct vpif_cap_buffer *to_vpif_buffer(struct vb2_v4l2_buffer *vb)
 62 {
 63         return container_of(vb, struct vpif_cap_buffer, vb);
 64 }
 65 
 66 /**
 67  * vpif_buffer_prepare :  callback function for buffer prepare
 68  * @vb: ptr to vb2_buffer
 69  *
 70  * This is the callback function for buffer prepare when vb2_qbuf()
 71  * function is called. The buffer is prepared and user space virtual address
 72  * or user address is converted into  physical address
 73  */
 74 static int vpif_buffer_prepare(struct vb2_buffer *vb)
 75 {
 76         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 77         struct vb2_queue *q = vb->vb2_queue;
 78         struct channel_obj *ch = vb2_get_drv_priv(q);
 79         struct common_obj *common;
 80         unsigned long addr;
 81 
 82         vpif_dbg(2, debug, "vpif_buffer_prepare\n");
 83 
 84         common = &ch->common[VPIF_VIDEO_INDEX];
 85 
 86         vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
 87         if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
 88                 return -EINVAL;
 89 
 90         vbuf->field = common->fmt.fmt.pix.field;
 91 
 92         addr = vb2_dma_contig_plane_dma_addr(vb, 0);
 93         if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
 94                 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
 95                 !IS_ALIGNED((addr + common->ctop_off), 8) ||
 96                 !IS_ALIGNED((addr + common->cbtm_off), 8)) {
 97                 vpif_dbg(1, debug, "offset is not aligned\n");
 98                 return -EINVAL;
 99         }
100 
101         return 0;
102 }
103 
104 /**
105  * vpif_buffer_queue_setup : Callback function for buffer setup.
106  * @vq: vb2_queue ptr
107  * @nbuffers: ptr to number of buffers requested by application
108  * @nplanes:: contains number of distinct video planes needed to hold a frame
109  * @sizes[]: contains the size (in bytes) of each plane.
110  * @alloc_ctxs: ptr to allocation context
111  *
112  * This callback function is called when reqbuf() is called to adjust
113  * the buffer count and buffer size
114  */
115 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
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 = &ch->common[VPIF_VIDEO_INDEX];
121         unsigned size = common->fmt.fmt.pix.sizeimage;
122 
123         vpif_dbg(2, debug, "vpif_buffer_setup\n");
124 
125         if (*nplanes) {
126                 if (sizes[0] < size)
127                         return -EINVAL;
128                 size = sizes[0];
129         }
130 
131         if (vq->num_buffers + *nbuffers < 3)
132                 *nbuffers = 3 - vq->num_buffers;
133 
134         *nplanes = 1;
135         sizes[0] = size;
136         alloc_ctxs[0] = common->alloc_ctx;
137 
138         /* Calculate the offset for Y and C data in the buffer */
139         vpif_calculate_offsets(ch);
140 
141         return 0;
142 }
143 
144 /**
145  * vpif_buffer_queue : Callback function to add buffer to DMA queue
146  * @vb: ptr to vb2_buffer
147  */
148 static void vpif_buffer_queue(struct vb2_buffer *vb)
149 {
150         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
151         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
152         struct vpif_cap_buffer *buf = to_vpif_buffer(vbuf);
153         struct common_obj *common;
154         unsigned long flags;
155 
156         common = &ch->common[VPIF_VIDEO_INDEX];
157 
158         vpif_dbg(2, debug, "vpif_buffer_queue\n");
159 
160         spin_lock_irqsave(&common->irqlock, flags);
161         /* add the buffer to the DMA queue */
162         list_add_tail(&buf->list, &common->dma_queue);
163         spin_unlock_irqrestore(&common->irqlock, flags);
164 }
165 
166 /**
167  * vpif_start_streaming : Starts the DMA engine for streaming
168  * @vb: ptr to vb2_buffer
169  * @count: number of buffers
170  */
171 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
172 {
173         struct vpif_capture_config *vpif_config_data =
174                                         vpif_dev->platform_data;
175         struct channel_obj *ch = vb2_get_drv_priv(vq);
176         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
177         struct vpif_params *vpif = &ch->vpifparams;
178         struct vpif_cap_buffer *buf, *tmp;
179         unsigned long addr, flags;
180         int ret;
181 
182         spin_lock_irqsave(&common->irqlock, flags);
183 
184         /* Initialize field_id */
185         ch->field_id = 0;
186 
187         /* configure 1 or 2 channel mode */
188         if (vpif_config_data->setup_input_channel_mode) {
189                 ret = vpif_config_data->
190                         setup_input_channel_mode(vpif->std_info.ycmux_mode);
191                 if (ret < 0) {
192                         vpif_dbg(1, debug, "can't set vpif channel mode\n");
193                         goto err;
194                 }
195         }
196 
197         ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
198         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
199                 vpif_dbg(1, debug, "stream on failed in subdev\n");
200                 goto err;
201         }
202 
203         /* Call vpif_set_params function to set the parameters and addresses */
204         ret = vpif_set_video_params(vpif, ch->channel_id);
205         if (ret < 0) {
206                 vpif_dbg(1, debug, "can't set video params\n");
207                 goto err;
208         }
209 
210         ycmux_mode = ret;
211         vpif_config_addr(ch, ret);
212 
213         /* Get the next frame from the buffer queue */
214         common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
215                                     struct vpif_cap_buffer, list);
216         /* Remove buffer from the buffer queue */
217         list_del(&common->cur_frm->list);
218         spin_unlock_irqrestore(&common->irqlock, flags);
219 
220         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
221 
222         common->set_addr(addr + common->ytop_off,
223                          addr + common->ybtm_off,
224                          addr + common->ctop_off,
225                          addr + common->cbtm_off);
226 
227         /**
228          * Set interrupt for both the fields in VPIF Register enable channel in
229          * VPIF register
230          */
231         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
232         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
233                 channel0_intr_assert();
234                 channel0_intr_enable(1);
235                 enable_channel0(1);
236         }
237         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
238                 ycmux_mode == 2) {
239                 channel1_intr_assert();
240                 channel1_intr_enable(1);
241                 enable_channel1(1);
242         }
243 
244         return 0;
245 
246 err:
247         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
248                 list_del(&buf->list);
249                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
250         }
251         spin_unlock_irqrestore(&common->irqlock, flags);
252 
253         return ret;
254 }
255 
256 /**
257  * vpif_stop_streaming : Stop the DMA engine
258  * @vq: ptr to vb2_queue
259  *
260  * This callback stops the DMA engine and any remaining buffers
261  * in the DMA queue are released.
262  */
263 static void vpif_stop_streaming(struct vb2_queue *vq)
264 {
265         struct channel_obj *ch = vb2_get_drv_priv(vq);
266         struct common_obj *common;
267         unsigned long flags;
268         int ret;
269 
270         common = &ch->common[VPIF_VIDEO_INDEX];
271 
272         /* Disable channel as per its device type and channel id */
273         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
274                 enable_channel0(0);
275                 channel0_intr_enable(0);
276         }
277         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
278                 ycmux_mode == 2) {
279                 enable_channel1(0);
280                 channel1_intr_enable(0);
281         }
282 
283         ycmux_mode = 0;
284 
285         ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
286         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
287                 vpif_dbg(1, debug, "stream off failed in subdev\n");
288 
289         /* release all active buffers */
290         spin_lock_irqsave(&common->irqlock, flags);
291         if (common->cur_frm == common->next_frm) {
292                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
293                                 VB2_BUF_STATE_ERROR);
294         } else {
295                 if (common->cur_frm != NULL)
296                         vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
297                                         VB2_BUF_STATE_ERROR);
298                 if (common->next_frm != NULL)
299                         vb2_buffer_done(&common->next_frm->vb.vb2_buf,
300                                         VB2_BUF_STATE_ERROR);
301         }
302 
303         while (!list_empty(&common->dma_queue)) {
304                 common->next_frm = list_entry(common->dma_queue.next,
305                                                 struct vpif_cap_buffer, list);
306                 list_del(&common->next_frm->list);
307                 vb2_buffer_done(&common->next_frm->vb.vb2_buf,
308                                 VB2_BUF_STATE_ERROR);
309         }
310         spin_unlock_irqrestore(&common->irqlock, flags);
311 }
312 
313 static struct vb2_ops video_qops = {
314         .queue_setup            = vpif_buffer_queue_setup,
315         .buf_prepare            = vpif_buffer_prepare,
316         .start_streaming        = vpif_start_streaming,
317         .stop_streaming         = vpif_stop_streaming,
318         .buf_queue              = vpif_buffer_queue,
319         .wait_prepare           = vb2_ops_wait_prepare,
320         .wait_finish            = vb2_ops_wait_finish,
321 };
322 
323 /**
324  * vpif_process_buffer_complete: process a completed buffer
325  * @common: ptr to common channel object
326  *
327  * This function time stamp the buffer and mark it as DONE. It also
328  * wake up any process waiting on the QUEUE and set the next buffer
329  * as current
330  */
331 static void vpif_process_buffer_complete(struct common_obj *common)
332 {
333         common->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
334         vb2_buffer_done(&common->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
335         /* Make curFrm pointing to nextFrm */
336         common->cur_frm = common->next_frm;
337 }
338 
339 /**
340  * vpif_schedule_next_buffer: set next buffer address for capture
341  * @common : ptr to common channel object
342  *
343  * This function will get next buffer from the dma queue and
344  * set the buffer address in the vpif register for capture.
345  * the buffer is marked active
346  */
347 static void vpif_schedule_next_buffer(struct common_obj *common)
348 {
349         unsigned long addr = 0;
350 
351         spin_lock(&common->irqlock);
352         common->next_frm = list_entry(common->dma_queue.next,
353                                      struct vpif_cap_buffer, list);
354         /* Remove that buffer from the buffer queue */
355         list_del(&common->next_frm->list);
356         spin_unlock(&common->irqlock);
357         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
358 
359         /* Set top and bottom field addresses in VPIF registers */
360         common->set_addr(addr + common->ytop_off,
361                          addr + common->ybtm_off,
362                          addr + common->ctop_off,
363                          addr + common->cbtm_off);
364 }
365 
366 /**
367  * vpif_channel_isr : ISR handler for vpif capture
368  * @irq: irq number
369  * @dev_id: dev_id ptr
370  *
371  * It changes status of the captured buffer, takes next buffer from the queue
372  * and sets its address in VPIF registers
373  */
374 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
375 {
376         struct vpif_device *dev = &vpif_obj;
377         struct common_obj *common;
378         struct channel_obj *ch;
379         int channel_id = 0;
380         int fid = -1, i;
381 
382         channel_id = *(int *)(dev_id);
383         if (!vpif_intr_status(channel_id))
384                 return IRQ_NONE;
385 
386         ch = dev->dev[channel_id];
387 
388         for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
389                 common = &ch->common[i];
390                 /* skip If streaming is not started in this channel */
391                 /* Check the field format */
392                 if (1 == ch->vpifparams.std_info.frm_fmt) {
393                         /* Progressive mode */
394                         spin_lock(&common->irqlock);
395                         if (list_empty(&common->dma_queue)) {
396                                 spin_unlock(&common->irqlock);
397                                 continue;
398                         }
399                         spin_unlock(&common->irqlock);
400 
401                         if (!channel_first_int[i][channel_id])
402                                 vpif_process_buffer_complete(common);
403 
404                         channel_first_int[i][channel_id] = 0;
405 
406                         vpif_schedule_next_buffer(common);
407 
408 
409                         channel_first_int[i][channel_id] = 0;
410                 } else {
411                         /**
412                          * Interlaced mode. If it is first interrupt, ignore
413                          * it
414                          */
415                         if (channel_first_int[i][channel_id]) {
416                                 channel_first_int[i][channel_id] = 0;
417                                 continue;
418                         }
419                         if (0 == i) {
420                                 ch->field_id ^= 1;
421                                 /* Get field id from VPIF registers */
422                                 fid = vpif_channel_getfid(ch->channel_id);
423                                 if (fid != ch->field_id) {
424                                         /**
425                                          * If field id does not match stored
426                                          * field id, make them in sync
427                                          */
428                                         if (0 == fid)
429                                                 ch->field_id = fid;
430                                         return IRQ_HANDLED;
431                                 }
432                         }
433                         /* device field id and local field id are in sync */
434                         if (0 == fid) {
435                                 /* this is even field */
436                                 if (common->cur_frm == common->next_frm)
437                                         continue;
438 
439                                 /* mark the current buffer as done */
440                                 vpif_process_buffer_complete(common);
441                         } else if (1 == fid) {
442                                 /* odd field */
443                                 spin_lock(&common->irqlock);
444                                 if (list_empty(&common->dma_queue) ||
445                                     (common->cur_frm != common->next_frm)) {
446                                         spin_unlock(&common->irqlock);
447                                         continue;
448                                 }
449                                 spin_unlock(&common->irqlock);
450 
451                                 vpif_schedule_next_buffer(common);
452                         }
453                 }
454         }
455         return IRQ_HANDLED;
456 }
457 
458 /**
459  * vpif_update_std_info() - update standard related info
460  * @ch: ptr to channel object
461  *
462  * For a given standard selected by application, update values
463  * in the device data structures
464  */
465 static int vpif_update_std_info(struct channel_obj *ch)
466 {
467         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
468         struct vpif_params *vpifparams = &ch->vpifparams;
469         const struct vpif_channel_config_params *config;
470         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
471         struct video_obj *vid_ch = &ch->video;
472         int index;
473 
474         vpif_dbg(2, debug, "vpif_update_std_info\n");
475 
476         for (index = 0; index < vpif_ch_params_count; index++) {
477                 config = &vpif_ch_params[index];
478                 if (config->hd_sd == 0) {
479                         vpif_dbg(2, debug, "SD format\n");
480                         if (config->stdid & vid_ch->stdid) {
481                                 memcpy(std_info, config, sizeof(*config));
482                                 break;
483                         }
484                 } else {
485                         vpif_dbg(2, debug, "HD format\n");
486                         if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
487                                 sizeof(vid_ch->dv_timings))) {
488                                 memcpy(std_info, config, sizeof(*config));
489                                 break;
490                         }
491                 }
492         }
493 
494         /* standard not found */
495         if (index == vpif_ch_params_count)
496                 return -EINVAL;
497 
498         common->fmt.fmt.pix.width = std_info->width;
499         common->width = std_info->width;
500         common->fmt.fmt.pix.height = std_info->height;
501         common->height = std_info->height;
502         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
503         common->fmt.fmt.pix.bytesperline = std_info->width;
504         vpifparams->video_params.hpitch = std_info->width;
505         vpifparams->video_params.storage_mode = std_info->frm_fmt;
506 
507         if (vid_ch->stdid)
508                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
509         else
510                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
511 
512         if (ch->vpifparams.std_info.frm_fmt)
513                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
514         else
515                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
516 
517         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
518                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
519         else
520                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
521 
522         common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
523 
524         return 0;
525 }
526 
527 /**
528  * vpif_calculate_offsets : This function calculates buffers offsets
529  * @ch : ptr to channel object
530  *
531  * This function calculates buffer offsets for Y and C in the top and
532  * bottom field
533  */
534 static void vpif_calculate_offsets(struct channel_obj *ch)
535 {
536         unsigned int hpitch, sizeimage;
537         struct video_obj *vid_ch = &(ch->video);
538         struct vpif_params *vpifparams = &ch->vpifparams;
539         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
540         enum v4l2_field field = common->fmt.fmt.pix.field;
541 
542         vpif_dbg(2, debug, "vpif_calculate_offsets\n");
543 
544         if (V4L2_FIELD_ANY == field) {
545                 if (vpifparams->std_info.frm_fmt)
546                         vid_ch->buf_field = V4L2_FIELD_NONE;
547                 else
548                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
549         } else
550                 vid_ch->buf_field = common->fmt.fmt.pix.field;
551 
552         sizeimage = common->fmt.fmt.pix.sizeimage;
553 
554         hpitch = common->fmt.fmt.pix.bytesperline;
555 
556         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
557             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
558                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
559                 common->ytop_off = 0;
560                 common->ybtm_off = hpitch;
561                 common->ctop_off = sizeimage / 2;
562                 common->cbtm_off = sizeimage / 2 + hpitch;
563         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
564                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
565                 common->ytop_off = 0;
566                 common->ybtm_off = sizeimage / 4;
567                 common->ctop_off = sizeimage / 2;
568                 common->cbtm_off = common->ctop_off + sizeimage / 4;
569         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
570                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
571                 common->ybtm_off = 0;
572                 common->ytop_off = sizeimage / 4;
573                 common->cbtm_off = sizeimage / 2;
574                 common->ctop_off = common->cbtm_off + sizeimage / 4;
575         }
576         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
577             (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
578                 vpifparams->video_params.storage_mode = 1;
579         else
580                 vpifparams->video_params.storage_mode = 0;
581 
582         if (1 == vpifparams->std_info.frm_fmt)
583                 vpifparams->video_params.hpitch =
584                     common->fmt.fmt.pix.bytesperline;
585         else {
586                 if ((field == V4L2_FIELD_ANY)
587                     || (field == V4L2_FIELD_INTERLACED))
588                         vpifparams->video_params.hpitch =
589                             common->fmt.fmt.pix.bytesperline * 2;
590                 else
591                         vpifparams->video_params.hpitch =
592                             common->fmt.fmt.pix.bytesperline;
593         }
594 
595         ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
596 }
597 
598 /**
599  * vpif_get_default_field() - Get default field type based on interface
600  * @vpif_params - ptr to vpif params
601  */
602 static inline enum v4l2_field vpif_get_default_field(
603                                 struct vpif_interface *iface)
604 {
605         return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
606                                                 V4L2_FIELD_INTERLACED;
607 }
608 
609 /**
610  * vpif_config_addr() - function to configure buffer address in vpif
611  * @ch - channel ptr
612  * @muxmode - channel mux mode
613  */
614 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
615 {
616         struct common_obj *common;
617 
618         vpif_dbg(2, debug, "vpif_config_addr\n");
619 
620         common = &(ch->common[VPIF_VIDEO_INDEX]);
621 
622         if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
623                 common->set_addr = ch1_set_videobuf_addr;
624         else if (2 == muxmode)
625                 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
626         else
627                 common->set_addr = ch0_set_videobuf_addr;
628 }
629 
630 /**
631  * vpif_input_to_subdev() - Maps input to sub device
632  * @vpif_cfg - global config ptr
633  * @chan_cfg - channel config ptr
634  * @input_index - Given input index from application
635  *
636  * lookup the sub device information for a given input index.
637  * we report all the inputs to application. inputs table also
638  * has sub device name for the each input
639  */
640 static int vpif_input_to_subdev(
641                 struct vpif_capture_config *vpif_cfg,
642                 struct vpif_capture_chan_config *chan_cfg,
643                 int input_index)
644 {
645         struct vpif_subdev_info *subdev_info;
646         const char *subdev_name;
647         int i;
648 
649         vpif_dbg(2, debug, "vpif_input_to_subdev\n");
650 
651         subdev_name = chan_cfg->inputs[input_index].subdev_name;
652         if (subdev_name == NULL)
653                 return -1;
654 
655         /* loop through the sub device list to get the sub device info */
656         for (i = 0; i < vpif_cfg->subdev_count; i++) {
657                 subdev_info = &vpif_cfg->subdev_info[i];
658                 if (!strcmp(subdev_info->name, subdev_name))
659                         return i;
660         }
661         return -1;
662 }
663 
664 /**
665  * vpif_set_input() - Select an input
666  * @vpif_cfg - global config ptr
667  * @ch - channel
668  * @_index - Given input index from application
669  *
670  * Select the given input.
671  */
672 static int vpif_set_input(
673                 struct vpif_capture_config *vpif_cfg,
674                 struct channel_obj *ch,
675                 int index)
676 {
677         struct vpif_capture_chan_config *chan_cfg =
678                         &vpif_cfg->chan_config[ch->channel_id];
679         struct vpif_subdev_info *subdev_info = NULL;
680         struct v4l2_subdev *sd = NULL;
681         u32 input = 0, output = 0;
682         int sd_index;
683         int ret;
684 
685         sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
686         if (sd_index >= 0) {
687                 sd = vpif_obj.sd[sd_index];
688                 subdev_info = &vpif_cfg->subdev_info[sd_index];
689         }
690 
691         /* first setup input path from sub device to vpif */
692         if (sd && vpif_cfg->setup_input_path) {
693                 ret = vpif_cfg->setup_input_path(ch->channel_id,
694                                        subdev_info->name);
695                 if (ret < 0) {
696                         vpif_dbg(1, debug, "couldn't setup input path for the" \
697                         " sub device %s, for input index %d\n",
698                         subdev_info->name, index);
699                         return ret;
700                 }
701         }
702 
703         if (sd) {
704                 input = chan_cfg->inputs[index].input_route;
705                 output = chan_cfg->inputs[index].output_route;
706                 ret = v4l2_subdev_call(sd, video, s_routing,
707                                 input, output, 0);
708                 if (ret < 0 && ret != -ENOIOCTLCMD) {
709                         vpif_dbg(1, debug, "Failed to set input\n");
710                         return ret;
711                 }
712         }
713         ch->input_idx = index;
714         ch->sd = sd;
715         /* copy interface parameters to vpif */
716         ch->vpifparams.iface = chan_cfg->vpif_if;
717 
718         /* update tvnorms from the sub device input info */
719         ch->video_dev.tvnorms = chan_cfg->inputs[index].input.std;
720         return 0;
721 }
722 
723 /**
724  * vpif_querystd() - querystd handler
725  * @file: file ptr
726  * @priv: file handle
727  * @std_id: ptr to std id
728  *
729  * This function is called to detect standard at the selected input
730  */
731 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
732 {
733         struct video_device *vdev = video_devdata(file);
734         struct channel_obj *ch = video_get_drvdata(vdev);
735         int ret = 0;
736 
737         vpif_dbg(2, debug, "vpif_querystd\n");
738 
739         /* Call querystd function of decoder device */
740         ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
741 
742         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
743                 return -ENODATA;
744         if (ret) {
745                 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
746                 return ret;
747         }
748 
749         return 0;
750 }
751 
752 /**
753  * vpif_g_std() - get STD handler
754  * @file: file ptr
755  * @priv: file handle
756  * @std_id: ptr to std id
757  */
758 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
759 {
760         struct vpif_capture_config *config = vpif_dev->platform_data;
761         struct video_device *vdev = video_devdata(file);
762         struct channel_obj *ch = video_get_drvdata(vdev);
763         struct vpif_capture_chan_config *chan_cfg;
764         struct v4l2_input input;
765 
766         vpif_dbg(2, debug, "vpif_g_std\n");
767 
768         if (config->chan_config[ch->channel_id].inputs == NULL)
769                 return -ENODATA;
770 
771         chan_cfg = &config->chan_config[ch->channel_id];
772         input = chan_cfg->inputs[ch->input_idx].input;
773         if (input.capabilities != V4L2_IN_CAP_STD)
774                 return -ENODATA;
775 
776         *std = ch->video.stdid;
777         return 0;
778 }
779 
780 /**
781  * vpif_s_std() - set STD handler
782  * @file: file ptr
783  * @priv: file handle
784  * @std_id: ptr to std id
785  */
786 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
787 {
788         struct vpif_capture_config *config = vpif_dev->platform_data;
789         struct video_device *vdev = video_devdata(file);
790         struct channel_obj *ch = video_get_drvdata(vdev);
791         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
792         struct vpif_capture_chan_config *chan_cfg;
793         struct v4l2_input input;
794         int ret;
795 
796         vpif_dbg(2, debug, "vpif_s_std\n");
797 
798         if (config->chan_config[ch->channel_id].inputs == NULL)
799                 return -ENODATA;
800 
801         chan_cfg = &config->chan_config[ch->channel_id];
802         input = chan_cfg->inputs[ch->input_idx].input;
803         if (input.capabilities != V4L2_IN_CAP_STD)
804                 return -ENODATA;
805 
806         if (vb2_is_busy(&common->buffer_queue))
807                 return -EBUSY;
808 
809         /* Call encoder subdevice function to set the standard */
810         ch->video.stdid = std_id;
811         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
812 
813         /* Get the information about the standard */
814         if (vpif_update_std_info(ch)) {
815                 vpif_err("Error getting the standard info\n");
816                 return -EINVAL;
817         }
818 
819         /* set standard in the sub device */
820         ret = v4l2_subdev_call(ch->sd, video, s_std, std_id);
821         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
822                 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
823                 return ret;
824         }
825         return 0;
826 }
827 
828 /**
829  * vpif_enum_input() - ENUMINPUT handler
830  * @file: file ptr
831  * @priv: file handle
832  * @input: ptr to input structure
833  */
834 static int vpif_enum_input(struct file *file, void *priv,
835                                 struct v4l2_input *input)
836 {
837 
838         struct vpif_capture_config *config = vpif_dev->platform_data;
839         struct video_device *vdev = video_devdata(file);
840         struct channel_obj *ch = video_get_drvdata(vdev);
841         struct vpif_capture_chan_config *chan_cfg;
842 
843         chan_cfg = &config->chan_config[ch->channel_id];
844 
845         if (input->index >= chan_cfg->input_count)
846                 return -EINVAL;
847 
848         memcpy(input, &chan_cfg->inputs[input->index].input,
849                 sizeof(*input));
850         return 0;
851 }
852 
853 /**
854  * vpif_g_input() - Get INPUT handler
855  * @file: file ptr
856  * @priv: file handle
857  * @index: ptr to input index
858  */
859 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
860 {
861         struct video_device *vdev = video_devdata(file);
862         struct channel_obj *ch = video_get_drvdata(vdev);
863 
864         *index = ch->input_idx;
865         return 0;
866 }
867 
868 /**
869  * vpif_s_input() - Set INPUT handler
870  * @file: file ptr
871  * @priv: file handle
872  * @index: input index
873  */
874 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
875 {
876         struct vpif_capture_config *config = vpif_dev->platform_data;
877         struct video_device *vdev = video_devdata(file);
878         struct channel_obj *ch = video_get_drvdata(vdev);
879         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
880         struct vpif_capture_chan_config *chan_cfg;
881 
882         chan_cfg = &config->chan_config[ch->channel_id];
883 
884         if (index >= chan_cfg->input_count)
885                 return -EINVAL;
886 
887         if (vb2_is_busy(&common->buffer_queue))
888                 return -EBUSY;
889 
890         return vpif_set_input(config, ch, index);
891 }
892 
893 /**
894  * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
895  * @file: file ptr
896  * @priv: file handle
897  * @index: input index
898  */
899 static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
900                                         struct v4l2_fmtdesc *fmt)
901 {
902         struct video_device *vdev = video_devdata(file);
903         struct channel_obj *ch = video_get_drvdata(vdev);
904 
905         if (fmt->index != 0) {
906                 vpif_dbg(1, debug, "Invalid format index\n");
907                 return -EINVAL;
908         }
909 
910         /* Fill in the information about format */
911         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
912                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
913                 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
914                 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
915         } else {
916                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
917                 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
918                 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
919         }
920         return 0;
921 }
922 
923 /**
924  * vpif_try_fmt_vid_cap() - TRY_FMT handler
925  * @file: file ptr
926  * @priv: file handle
927  * @fmt: ptr to v4l2 format structure
928  */
929 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
930                                 struct v4l2_format *fmt)
931 {
932         struct video_device *vdev = video_devdata(file);
933         struct channel_obj *ch = video_get_drvdata(vdev);
934         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
935         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
936         struct vpif_params *vpif_params = &ch->vpifparams;
937 
938         /*
939          * to supress v4l-compliance warnings silently correct
940          * the pixelformat
941          */
942         if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
943                 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8)
944                         pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
945         } else {
946                 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
947                         pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
948         }
949 
950         common->fmt.fmt.pix.pixelformat = pixfmt->pixelformat;
951 
952         vpif_update_std_info(ch);
953 
954         pixfmt->field = common->fmt.fmt.pix.field;
955         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
956         pixfmt->bytesperline = common->fmt.fmt.pix.width;
957         pixfmt->width = common->fmt.fmt.pix.width;
958         pixfmt->height = common->fmt.fmt.pix.height;
959         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
960         pixfmt->priv = 0;
961 
962         return 0;
963 }
964 
965 
966 /**
967  * vpif_g_fmt_vid_cap() - Set INPUT handler
968  * @file: file ptr
969  * @priv: file handle
970  * @fmt: ptr to v4l2 format structure
971  */
972 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
973                                 struct v4l2_format *fmt)
974 {
975         struct video_device *vdev = video_devdata(file);
976         struct channel_obj *ch = video_get_drvdata(vdev);
977         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
978 
979         /* Check the validity of the buffer type */
980         if (common->fmt.type != fmt->type)
981                 return -EINVAL;
982 
983         /* Fill in the information about format */
984         *fmt = common->fmt;
985         return 0;
986 }
987 
988 /**
989  * vpif_s_fmt_vid_cap() - Set FMT handler
990  * @file: file ptr
991  * @priv: file handle
992  * @fmt: ptr to v4l2 format structure
993  */
994 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
995                                 struct v4l2_format *fmt)
996 {
997         struct video_device *vdev = video_devdata(file);
998         struct channel_obj *ch = video_get_drvdata(vdev);
999         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1000         int ret;
1001 
1002         vpif_dbg(2, debug, "%s\n", __func__);
1003 
1004         if (vb2_is_busy(&common->buffer_queue))
1005                 return -EBUSY;
1006 
1007         ret = vpif_try_fmt_vid_cap(file, priv, fmt);
1008         if (ret)
1009                 return ret;
1010 
1011         /* store the format in the channel object */
1012         common->fmt = *fmt;
1013         return 0;
1014 }
1015 
1016 /**
1017  * vpif_querycap() - QUERYCAP handler
1018  * @file: file ptr
1019  * @priv: file handle
1020  * @cap: ptr to v4l2_capability structure
1021  */
1022 static int vpif_querycap(struct file *file, void  *priv,
1023                                 struct v4l2_capability *cap)
1024 {
1025         struct vpif_capture_config *config = vpif_dev->platform_data;
1026 
1027         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1028         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1029         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
1030         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1031                  dev_name(vpif_dev));
1032         strlcpy(cap->card, config->card_name, sizeof(cap->card));
1033 
1034         return 0;
1035 }
1036 
1037 /**
1038  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1039  * @file: file ptr
1040  * @priv: file handle
1041  * @timings: input timings
1042  */
1043 static int
1044 vpif_enum_dv_timings(struct file *file, void *priv,
1045                      struct v4l2_enum_dv_timings *timings)
1046 {
1047         struct vpif_capture_config *config = vpif_dev->platform_data;
1048         struct video_device *vdev = video_devdata(file);
1049         struct channel_obj *ch = video_get_drvdata(vdev);
1050         struct vpif_capture_chan_config *chan_cfg;
1051         struct v4l2_input input;
1052         int ret;
1053 
1054         if (config->chan_config[ch->channel_id].inputs == NULL)
1055                 return -ENODATA;
1056 
1057         chan_cfg = &config->chan_config[ch->channel_id];
1058         input = chan_cfg->inputs[ch->input_idx].input;
1059         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1060                 return -ENODATA;
1061 
1062         timings->pad = 0;
1063 
1064         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
1065         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1066                 return -EINVAL;
1067 
1068         return ret;
1069 }
1070 
1071 /**
1072  * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1073  * @file: file ptr
1074  * @priv: file handle
1075  * @timings: input timings
1076  */
1077 static int
1078 vpif_query_dv_timings(struct file *file, void *priv,
1079                       struct v4l2_dv_timings *timings)
1080 {
1081         struct vpif_capture_config *config = vpif_dev->platform_data;
1082         struct video_device *vdev = video_devdata(file);
1083         struct channel_obj *ch = video_get_drvdata(vdev);
1084         struct vpif_capture_chan_config *chan_cfg;
1085         struct v4l2_input input;
1086         int ret;
1087 
1088         if (config->chan_config[ch->channel_id].inputs == NULL)
1089                 return -ENODATA;
1090 
1091         chan_cfg = &config->chan_config[ch->channel_id];
1092         input = chan_cfg->inputs[ch->input_idx].input;
1093         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1094                 return -ENODATA;
1095 
1096         ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1097         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1098                 return -ENODATA;
1099 
1100         return ret;
1101 }
1102 
1103 /**
1104  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1105  * @file: file ptr
1106  * @priv: file handle
1107  * @timings: digital video timings
1108  */
1109 static int vpif_s_dv_timings(struct file *file, void *priv,
1110                 struct v4l2_dv_timings *timings)
1111 {
1112         struct vpif_capture_config *config = vpif_dev->platform_data;
1113         struct video_device *vdev = video_devdata(file);
1114         struct channel_obj *ch = video_get_drvdata(vdev);
1115         struct vpif_params *vpifparams = &ch->vpifparams;
1116         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1117         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1118         struct video_obj *vid_ch = &ch->video;
1119         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1120         struct vpif_capture_chan_config *chan_cfg;
1121         struct v4l2_input input;
1122         int ret;
1123 
1124         if (config->chan_config[ch->channel_id].inputs == NULL)
1125                 return -ENODATA;
1126 
1127         chan_cfg = &config->chan_config[ch->channel_id];
1128         input = chan_cfg->inputs[ch->input_idx].input;
1129         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1130                 return -ENODATA;
1131 
1132         if (timings->type != V4L2_DV_BT_656_1120) {
1133                 vpif_dbg(2, debug, "Timing type not defined\n");
1134                 return -EINVAL;
1135         }
1136 
1137         if (vb2_is_busy(&common->buffer_queue))
1138                 return -EBUSY;
1139 
1140         /* Configure subdevice timings, if any */
1141         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1142         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1143                 ret = 0;
1144         if (ret < 0) {
1145                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1146                 return ret;
1147         }
1148 
1149         if (!(timings->bt.width && timings->bt.height &&
1150                                 (timings->bt.hbackporch ||
1151                                  timings->bt.hfrontporch ||
1152                                  timings->bt.hsync) &&
1153                                 timings->bt.vfrontporch &&
1154                                 (timings->bt.vbackporch ||
1155                                  timings->bt.vsync))) {
1156                 vpif_dbg(2, debug, "Timings for width, height, "
1157                                 "horizontal back porch, horizontal sync, "
1158                                 "horizontal front porch, vertical back porch, "
1159                                 "vertical sync and vertical back porch "
1160                                 "must be defined\n");
1161                 return -EINVAL;
1162         }
1163 
1164         vid_ch->dv_timings = *timings;
1165 
1166         /* Configure video port timings */
1167 
1168         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
1169         std_info->sav2eav = bt->width;
1170 
1171         std_info->l1 = 1;
1172         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1173 
1174         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
1175         if (bt->interlaced) {
1176                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1177                         std_info->l5 = std_info->vsize/2 -
1178                                 (bt->vfrontporch - 1);
1179                         std_info->l7 = std_info->vsize/2 + 1;
1180                         std_info->l9 = std_info->l7 + bt->il_vsync +
1181                                 bt->il_vbackporch + 1;
1182                         std_info->l11 = std_info->vsize -
1183                                 (bt->il_vfrontporch - 1);
1184                 } else {
1185                         vpif_dbg(2, debug, "Required timing values for "
1186                                         "interlaced BT format missing\n");
1187                         return -EINVAL;
1188                 }
1189         } else {
1190                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1191         }
1192         strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1193         std_info->width = bt->width;
1194         std_info->height = bt->height;
1195         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1196         std_info->ycmux_mode = 0;
1197         std_info->capture_format = 0;
1198         std_info->vbi_supported = 0;
1199         std_info->hd_sd = 1;
1200         std_info->stdid = 0;
1201 
1202         vid_ch->stdid = 0;
1203         return 0;
1204 }
1205 
1206 /**
1207  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1208  * @file: file ptr
1209  * @priv: file handle
1210  * @timings: digital video timings
1211  */
1212 static int vpif_g_dv_timings(struct file *file, void *priv,
1213                 struct v4l2_dv_timings *timings)
1214 {
1215         struct vpif_capture_config *config = vpif_dev->platform_data;
1216         struct video_device *vdev = video_devdata(file);
1217         struct channel_obj *ch = video_get_drvdata(vdev);
1218         struct video_obj *vid_ch = &ch->video;
1219         struct vpif_capture_chan_config *chan_cfg;
1220         struct v4l2_input input;
1221 
1222         if (config->chan_config[ch->channel_id].inputs == NULL)
1223                 return -ENODATA;
1224 
1225         chan_cfg = &config->chan_config[ch->channel_id];
1226         input = chan_cfg->inputs[ch->input_idx].input;
1227         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1228                 return -ENODATA;
1229 
1230         *timings = vid_ch->dv_timings;
1231 
1232         return 0;
1233 }
1234 
1235 /*
1236  * vpif_log_status() - Status information
1237  * @file: file ptr
1238  * @priv: file handle
1239  *
1240  * Returns zero.
1241  */
1242 static int vpif_log_status(struct file *filep, void *priv)
1243 {
1244         /* status for sub devices */
1245         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1246 
1247         return 0;
1248 }
1249 
1250 /* vpif capture ioctl operations */
1251 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1252         .vidioc_querycap                = vpif_querycap,
1253         .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1254         .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1255         .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1256         .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1257 
1258         .vidioc_enum_input              = vpif_enum_input,
1259         .vidioc_s_input                 = vpif_s_input,
1260         .vidioc_g_input                 = vpif_g_input,
1261 
1262         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1263         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1264         .vidioc_querybuf                = vb2_ioctl_querybuf,
1265         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1266         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1267         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1268         .vidioc_streamon                = vb2_ioctl_streamon,
1269         .vidioc_streamoff               = vb2_ioctl_streamoff,
1270 
1271         .vidioc_querystd                = vpif_querystd,
1272         .vidioc_s_std                   = vpif_s_std,
1273         .vidioc_g_std                   = vpif_g_std,
1274 
1275         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1276         .vidioc_query_dv_timings        = vpif_query_dv_timings,
1277         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1278         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1279 
1280         .vidioc_log_status              = vpif_log_status,
1281 };
1282 
1283 /* vpif file operations */
1284 static struct v4l2_file_operations vpif_fops = {
1285         .owner = THIS_MODULE,
1286         .open = v4l2_fh_open,
1287         .release = vb2_fop_release,
1288         .unlocked_ioctl = video_ioctl2,
1289         .mmap = vb2_fop_mmap,
1290         .poll = vb2_fop_poll
1291 };
1292 
1293 /**
1294  * initialize_vpif() - Initialize vpif data structures
1295  *
1296  * Allocate memory for data structures and initialize them
1297  */
1298 static int initialize_vpif(void)
1299 {
1300         int err, i, j;
1301         int free_channel_objects_index;
1302 
1303         /* Allocate memory for six channel objects */
1304         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1305                 vpif_obj.dev[i] =
1306                     kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1307                 /* If memory allocation fails, return error */
1308                 if (!vpif_obj.dev[i]) {
1309                         free_channel_objects_index = i;
1310                         err = -ENOMEM;
1311                         goto vpif_init_free_channel_objects;
1312                 }
1313         }
1314         return 0;
1315 
1316 vpif_init_free_channel_objects:
1317         for (j = 0; j < free_channel_objects_index; j++)
1318                 kfree(vpif_obj.dev[j]);
1319         return err;
1320 }
1321 
1322 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1323                             struct v4l2_subdev *subdev,
1324                             struct v4l2_async_subdev *asd)
1325 {
1326         int i;
1327 
1328         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1329                 if (!strcmp(vpif_obj.config->subdev_info[i].name,
1330                             subdev->name)) {
1331                         vpif_obj.sd[i] = subdev;
1332                         return 0;
1333                 }
1334 
1335         return -EINVAL;
1336 }
1337 
1338 static int vpif_probe_complete(void)
1339 {
1340         struct common_obj *common;
1341         struct video_device *vdev;
1342         struct channel_obj *ch;
1343         struct vb2_queue *q;
1344         int j, err, k;
1345 
1346         for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1347                 ch = vpif_obj.dev[j];
1348                 ch->channel_id = j;
1349                 common = &(ch->common[VPIF_VIDEO_INDEX]);
1350                 spin_lock_init(&common->irqlock);
1351                 mutex_init(&common->lock);
1352 
1353                 /* select input 0 */
1354                 err = vpif_set_input(vpif_obj.config, ch, 0);
1355                 if (err)
1356                         goto probe_out;
1357 
1358                 /* set initial format */
1359                 ch->video.stdid = V4L2_STD_525_60;
1360                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1361                 vpif_update_std_info(ch);
1362 
1363                 /* Initialize vb2 queue */
1364                 q = &common->buffer_queue;
1365                 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1366                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1367                 q->drv_priv = ch;
1368                 q->ops = &video_qops;
1369                 q->mem_ops = &vb2_dma_contig_memops;
1370                 q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1371                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1372                 q->min_buffers_needed = 1;
1373                 q->lock = &common->lock;
1374 
1375                 err = vb2_queue_init(q);
1376                 if (err) {
1377                         vpif_err("vpif_capture: vb2_queue_init() failed\n");
1378                         goto probe_out;
1379                 }
1380 
1381                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1382                 if (IS_ERR(common->alloc_ctx)) {
1383                         vpif_err("Failed to get the context\n");
1384                         err = PTR_ERR(common->alloc_ctx);
1385                         goto probe_out;
1386                 }
1387 
1388                 INIT_LIST_HEAD(&common->dma_queue);
1389 
1390                 /* Initialize the video_device structure */
1391                 vdev = &ch->video_dev;
1392                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1393                 vdev->release = video_device_release_empty;
1394                 vdev->fops = &vpif_fops;
1395                 vdev->ioctl_ops = &vpif_ioctl_ops;
1396                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1397                 vdev->vfl_dir = VFL_DIR_RX;
1398                 vdev->queue = q;
1399                 vdev->lock = &common->lock;
1400                 video_set_drvdata(&ch->video_dev, ch);
1401                 err = video_register_device(vdev,
1402                                             VFL_TYPE_GRABBER, (j ? 1 : 0));
1403                 if (err)
1404                         goto probe_out;
1405         }
1406 
1407         v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
1408         return 0;
1409 
1410 probe_out:
1411         for (k = 0; k < j; k++) {
1412                 /* Get the pointer to the channel object */
1413                 ch = vpif_obj.dev[k];
1414                 common = &ch->common[k];
1415                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1416                 /* Unregister video device */
1417                 video_unregister_device(&ch->video_dev);
1418         }
1419         kfree(vpif_obj.sd);
1420         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1421 
1422         return err;
1423 }
1424 
1425 static int vpif_async_complete(struct v4l2_async_notifier *notifier)
1426 {
1427         return vpif_probe_complete();
1428 }
1429 
1430 /**
1431  * vpif_probe : This function probes the vpif capture driver
1432  * @pdev: platform device pointer
1433  *
1434  * This creates device entries by register itself to the V4L2 driver and
1435  * initializes fields of each channel objects
1436  */
1437 static __init int vpif_probe(struct platform_device *pdev)
1438 {
1439         struct vpif_subdev_info *subdevdata;
1440         struct i2c_adapter *i2c_adap;
1441         struct resource *res;
1442         int subdev_count;
1443         int res_idx = 0;
1444         int i, err;
1445 
1446         vpif_dev = &pdev->dev;
1447 
1448         err = initialize_vpif();
1449         if (err) {
1450                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1451                 return err;
1452         }
1453 
1454         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1455         if (err) {
1456                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1457                 return err;
1458         }
1459 
1460         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1461                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1462                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1463                                         (void *)(&vpif_obj.dev[res_idx]->
1464                                         channel_id));
1465                 if (err) {
1466                         err = -EINVAL;
1467                         goto vpif_unregister;
1468                 }
1469                 res_idx++;
1470         }
1471 
1472         vpif_obj.config = pdev->dev.platform_data;
1473 
1474         subdev_count = vpif_obj.config->subdev_count;
1475         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1476                                 GFP_KERNEL);
1477         if (vpif_obj.sd == NULL) {
1478                 vpif_err("unable to allocate memory for subdevice pointers\n");
1479                 err = -ENOMEM;
1480                 goto vpif_unregister;
1481         }
1482 
1483         if (!vpif_obj.config->asd_sizes) {
1484                 i2c_adap = i2c_get_adapter(1);
1485                 for (i = 0; i < subdev_count; i++) {
1486                         subdevdata = &vpif_obj.config->subdev_info[i];
1487                         vpif_obj.sd[i] =
1488                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1489                                                           i2c_adap,
1490                                                           &subdevdata->
1491                                                           board_info,
1492                                                           NULL);
1493 
1494                         if (!vpif_obj.sd[i]) {
1495                                 vpif_err("Error registering v4l2 subdevice\n");
1496                                 err = -ENODEV;
1497                                 goto probe_subdev_out;
1498                         }
1499                         v4l2_info(&vpif_obj.v4l2_dev,
1500                                   "registered sub device %s\n",
1501                                    subdevdata->name);
1502                 }
1503                 vpif_probe_complete();
1504         } else {
1505                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1506                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1507                 vpif_obj.notifier.bound = vpif_async_bound;
1508                 vpif_obj.notifier.complete = vpif_async_complete;
1509                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1510                                                    &vpif_obj.notifier);
1511                 if (err) {
1512                         vpif_err("Error registering async notifier\n");
1513                         err = -EINVAL;
1514                         goto probe_subdev_out;
1515                 }
1516         }
1517 
1518         return 0;
1519 
1520 probe_subdev_out:
1521         /* free sub devices memory */
1522         kfree(vpif_obj.sd);
1523 vpif_unregister:
1524         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1525 
1526         return err;
1527 }
1528 
1529 /**
1530  * vpif_remove() - driver remove handler
1531  * @device: ptr to platform device structure
1532  *
1533  * The vidoe device is unregistered
1534  */
1535 static int vpif_remove(struct platform_device *device)
1536 {
1537         struct common_obj *common;
1538         struct channel_obj *ch;
1539         int i;
1540 
1541         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1542 
1543         kfree(vpif_obj.sd);
1544         /* un-register device */
1545         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1546                 /* Get the pointer to the channel object */
1547                 ch = vpif_obj.dev[i];
1548                 common = &ch->common[VPIF_VIDEO_INDEX];
1549                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1550                 /* Unregister video device */
1551                 video_unregister_device(&ch->video_dev);
1552                 kfree(vpif_obj.dev[i]);
1553         }
1554         return 0;
1555 }
1556 
1557 #ifdef CONFIG_PM_SLEEP
1558 /**
1559  * vpif_suspend: vpif device suspend
1560  */
1561 static int vpif_suspend(struct device *dev)
1562 {
1563 
1564         struct common_obj *common;
1565         struct channel_obj *ch;
1566         int i;
1567 
1568         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1569                 /* Get the pointer to the channel object */
1570                 ch = vpif_obj.dev[i];
1571                 common = &ch->common[VPIF_VIDEO_INDEX];
1572 
1573                 if (!vb2_start_streaming_called(&common->buffer_queue))
1574                         continue;
1575 
1576                 mutex_lock(&common->lock);
1577                 /* Disable channel */
1578                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1579                         enable_channel0(0);
1580                         channel0_intr_enable(0);
1581                 }
1582                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1583                         ycmux_mode == 2) {
1584                         enable_channel1(0);
1585                         channel1_intr_enable(0);
1586                 }
1587                 mutex_unlock(&common->lock);
1588         }
1589 
1590         return 0;
1591 }
1592 
1593 /*
1594  * vpif_resume: vpif device suspend
1595  */
1596 static int vpif_resume(struct device *dev)
1597 {
1598         struct common_obj *common;
1599         struct channel_obj *ch;
1600         int i;
1601 
1602         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1603                 /* Get the pointer to the channel object */
1604                 ch = vpif_obj.dev[i];
1605                 common = &ch->common[VPIF_VIDEO_INDEX];
1606 
1607                 if (!vb2_start_streaming_called(&common->buffer_queue))
1608                         continue;
1609 
1610                 mutex_lock(&common->lock);
1611                 /* Enable channel */
1612                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1613                         enable_channel0(1);
1614                         channel0_intr_enable(1);
1615                 }
1616                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1617                         ycmux_mode == 2) {
1618                         enable_channel1(1);
1619                         channel1_intr_enable(1);
1620                 }
1621                 mutex_unlock(&common->lock);
1622         }
1623 
1624         return 0;
1625 }
1626 #endif
1627 
1628 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1629 
1630 static __refdata struct platform_driver vpif_driver = {
1631         .driver = {
1632                 .name   = VPIF_DRIVER_NAME,
1633                 .pm     = &vpif_pm_ops,
1634         },
1635         .probe = vpif_probe,
1636         .remove = vpif_remove,
1637 };
1638 
1639 module_platform_driver(vpif_driver);
1640 

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