Version:  2.0.40 2.2.26 2.4.37 3.8 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

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  * @fmt: v4l2 format
108  * @nbuffers: ptr to number of buffers requested by application
109  * @nplanes:: contains number of distinct video planes needed to hold a frame
110  * @sizes[]: contains the size (in bytes) of each plane.
111  * @alloc_ctxs: ptr to allocation context
112  *
113  * This callback function is called when reqbuf() is called to adjust
114  * the buffer count and buffer size
115  */
116 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
117                                 const void *parg,
118                                 unsigned int *nbuffers, unsigned int *nplanes,
119                                 unsigned int sizes[], void *alloc_ctxs[])
120 {
121         const struct v4l2_format *fmt = parg;
122         struct channel_obj *ch = vb2_get_drv_priv(vq);
123         struct common_obj *common;
124 
125         common = &ch->common[VPIF_VIDEO_INDEX];
126 
127         vpif_dbg(2, debug, "vpif_buffer_setup\n");
128 
129         if (fmt && fmt->fmt.pix.sizeimage < common->fmt.fmt.pix.sizeimage)
130                 return -EINVAL;
131 
132         if (vq->num_buffers + *nbuffers < 3)
133                 *nbuffers = 3 - vq->num_buffers;
134 
135         *nplanes = 1;
136         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : common->fmt.fmt.pix.sizeimage;
137         alloc_ctxs[0] = common->alloc_ctx;
138 
139         /* Calculate the offset for Y and C data in the buffer */
140         vpif_calculate_offsets(ch);
141 
142         return 0;
143 }
144 
145 /**
146  * vpif_buffer_queue : Callback function to add buffer to DMA queue
147  * @vb: ptr to vb2_buffer
148  */
149 static void vpif_buffer_queue(struct vb2_buffer *vb)
150 {
151         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
152         struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue);
153         struct vpif_cap_buffer *buf = to_vpif_buffer(vbuf);
154         struct common_obj *common;
155         unsigned long flags;
156 
157         common = &ch->common[VPIF_VIDEO_INDEX];
158 
159         vpif_dbg(2, debug, "vpif_buffer_queue\n");
160 
161         spin_lock_irqsave(&common->irqlock, flags);
162         /* add the buffer to the DMA queue */
163         list_add_tail(&buf->list, &common->dma_queue);
164         spin_unlock_irqrestore(&common->irqlock, flags);
165 }
166 
167 /**
168  * vpif_start_streaming : Starts the DMA engine for streaming
169  * @vb: ptr to vb2_buffer
170  * @count: number of buffers
171  */
172 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
173 {
174         struct vpif_capture_config *vpif_config_data =
175                                         vpif_dev->platform_data;
176         struct channel_obj *ch = vb2_get_drv_priv(vq);
177         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
178         struct vpif_params *vpif = &ch->vpifparams;
179         struct vpif_cap_buffer *buf, *tmp;
180         unsigned long addr, flags;
181         int ret;
182 
183         spin_lock_irqsave(&common->irqlock, flags);
184 
185         /* Initialize field_id */
186         ch->field_id = 0;
187 
188         /* configure 1 or 2 channel mode */
189         if (vpif_config_data->setup_input_channel_mode) {
190                 ret = vpif_config_data->
191                         setup_input_channel_mode(vpif->std_info.ycmux_mode);
192                 if (ret < 0) {
193                         vpif_dbg(1, debug, "can't set vpif channel mode\n");
194                         goto err;
195                 }
196         }
197 
198         ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
199         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
200                 vpif_dbg(1, debug, "stream on failed in subdev\n");
201                 goto err;
202         }
203 
204         /* Call vpif_set_params function to set the parameters and addresses */
205         ret = vpif_set_video_params(vpif, ch->channel_id);
206         if (ret < 0) {
207                 vpif_dbg(1, debug, "can't set video params\n");
208                 goto err;
209         }
210 
211         ycmux_mode = ret;
212         vpif_config_addr(ch, ret);
213 
214         /* Get the next frame from the buffer queue */
215         common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
216                                     struct vpif_cap_buffer, list);
217         /* Remove buffer from the buffer queue */
218         list_del(&common->cur_frm->list);
219         spin_unlock_irqrestore(&common->irqlock, flags);
220 
221         addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb.vb2_buf, 0);
222 
223         common->set_addr(addr + common->ytop_off,
224                          addr + common->ybtm_off,
225                          addr + common->ctop_off,
226                          addr + common->cbtm_off);
227 
228         /**
229          * Set interrupt for both the fields in VPIF Register enable channel in
230          * VPIF register
231          */
232         channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
233         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
234                 channel0_intr_assert();
235                 channel0_intr_enable(1);
236                 enable_channel0(1);
237         }
238         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
239                 ycmux_mode == 2) {
240                 channel1_intr_assert();
241                 channel1_intr_enable(1);
242                 enable_channel1(1);
243         }
244 
245         return 0;
246 
247 err:
248         list_for_each_entry_safe(buf, tmp, &common->dma_queue, list) {
249                 list_del(&buf->list);
250                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
251         }
252         spin_unlock_irqrestore(&common->irqlock, flags);
253 
254         return ret;
255 }
256 
257 /**
258  * vpif_stop_streaming : Stop the DMA engine
259  * @vq: ptr to vb2_queue
260  *
261  * This callback stops the DMA engine and any remaining buffers
262  * in the DMA queue are released.
263  */
264 static void vpif_stop_streaming(struct vb2_queue *vq)
265 {
266         struct channel_obj *ch = vb2_get_drv_priv(vq);
267         struct common_obj *common;
268         unsigned long flags;
269         int ret;
270 
271         common = &ch->common[VPIF_VIDEO_INDEX];
272 
273         /* Disable channel as per its device type and channel id */
274         if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
275                 enable_channel0(0);
276                 channel0_intr_enable(0);
277         }
278         if (VPIF_CHANNEL1_VIDEO == ch->channel_id ||
279                 ycmux_mode == 2) {
280                 enable_channel1(0);
281                 channel1_intr_enable(0);
282         }
283 
284         ycmux_mode = 0;
285 
286         ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
287         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
288                 vpif_dbg(1, debug, "stream off failed in subdev\n");
289 
290         /* release all active buffers */
291         spin_lock_irqsave(&common->irqlock, flags);
292         if (common->cur_frm == common->next_frm) {
293                 vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
294                                 VB2_BUF_STATE_ERROR);
295         } else {
296                 if (common->cur_frm != NULL)
297                         vb2_buffer_done(&common->cur_frm->vb.vb2_buf,
298                                         VB2_BUF_STATE_ERROR);
299                 if (common->next_frm != NULL)
300                         vb2_buffer_done(&common->next_frm->vb.vb2_buf,
301                                         VB2_BUF_STATE_ERROR);
302         }
303 
304         while (!list_empty(&common->dma_queue)) {
305                 common->next_frm = list_entry(common->dma_queue.next,
306                                                 struct vpif_cap_buffer, list);
307                 list_del(&common->next_frm->list);
308                 vb2_buffer_done(&common->next_frm->vb.vb2_buf,
309                                 VB2_BUF_STATE_ERROR);
310         }
311         spin_unlock_irqrestore(&common->irqlock, flags);
312 }
313 
314 static struct vb2_ops video_qops = {
315         .queue_setup            = vpif_buffer_queue_setup,
316         .buf_prepare            = vpif_buffer_prepare,
317         .start_streaming        = vpif_start_streaming,
318         .stop_streaming         = vpif_stop_streaming,
319         .buf_queue              = vpif_buffer_queue,
320         .wait_prepare           = vb2_ops_wait_prepare,
321         .wait_finish            = vb2_ops_wait_finish,
322 };
323 
324 /**
325  * vpif_process_buffer_complete: process a completed buffer
326  * @common: ptr to common channel object
327  *
328  * This function time stamp the buffer and mark it as DONE. It also
329  * wake up any process waiting on the QUEUE and set the next buffer
330  * as current
331  */
332 static void vpif_process_buffer_complete(struct common_obj *common)
333 {
334         v4l2_get_timestamp(&common->cur_frm->vb.timestamp);
335         vb2_buffer_done(&common->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
336         /* Make curFrm pointing to nextFrm */
337         common->cur_frm = common->next_frm;
338 }
339 
340 /**
341  * vpif_schedule_next_buffer: set next buffer address for capture
342  * @common : ptr to common channel object
343  *
344  * This function will get next buffer from the dma queue and
345  * set the buffer address in the vpif register for capture.
346  * the buffer is marked active
347  */
348 static void vpif_schedule_next_buffer(struct common_obj *common)
349 {
350         unsigned long addr = 0;
351 
352         spin_lock(&common->irqlock);
353         common->next_frm = list_entry(common->dma_queue.next,
354                                      struct vpif_cap_buffer, list);
355         /* Remove that buffer from the buffer queue */
356         list_del(&common->next_frm->list);
357         spin_unlock(&common->irqlock);
358         addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb.vb2_buf, 0);
359 
360         /* Set top and bottom field addresses in VPIF registers */
361         common->set_addr(addr + common->ytop_off,
362                          addr + common->ybtm_off,
363                          addr + common->ctop_off,
364                          addr + common->cbtm_off);
365 }
366 
367 /**
368  * vpif_channel_isr : ISR handler for vpif capture
369  * @irq: irq number
370  * @dev_id: dev_id ptr
371  *
372  * It changes status of the captured buffer, takes next buffer from the queue
373  * and sets its address in VPIF registers
374  */
375 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
376 {
377         struct vpif_device *dev = &vpif_obj;
378         struct common_obj *common;
379         struct channel_obj *ch;
380         int channel_id = 0;
381         int fid = -1, i;
382 
383         channel_id = *(int *)(dev_id);
384         if (!vpif_intr_status(channel_id))
385                 return IRQ_NONE;
386 
387         ch = dev->dev[channel_id];
388 
389         for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
390                 common = &ch->common[i];
391                 /* skip If streaming is not started in this channel */
392                 /* Check the field format */
393                 if (1 == ch->vpifparams.std_info.frm_fmt) {
394                         /* Progressive mode */
395                         spin_lock(&common->irqlock);
396                         if (list_empty(&common->dma_queue)) {
397                                 spin_unlock(&common->irqlock);
398                                 continue;
399                         }
400                         spin_unlock(&common->irqlock);
401 
402                         if (!channel_first_int[i][channel_id])
403                                 vpif_process_buffer_complete(common);
404 
405                         channel_first_int[i][channel_id] = 0;
406 
407                         vpif_schedule_next_buffer(common);
408 
409 
410                         channel_first_int[i][channel_id] = 0;
411                 } else {
412                         /**
413                          * Interlaced mode. If it is first interrupt, ignore
414                          * it
415                          */
416                         if (channel_first_int[i][channel_id]) {
417                                 channel_first_int[i][channel_id] = 0;
418                                 continue;
419                         }
420                         if (0 == i) {
421                                 ch->field_id ^= 1;
422                                 /* Get field id from VPIF registers */
423                                 fid = vpif_channel_getfid(ch->channel_id);
424                                 if (fid != ch->field_id) {
425                                         /**
426                                          * If field id does not match stored
427                                          * field id, make them in sync
428                                          */
429                                         if (0 == fid)
430                                                 ch->field_id = fid;
431                                         return IRQ_HANDLED;
432                                 }
433                         }
434                         /* device field id and local field id are in sync */
435                         if (0 == fid) {
436                                 /* this is even field */
437                                 if (common->cur_frm == common->next_frm)
438                                         continue;
439 
440                                 /* mark the current buffer as done */
441                                 vpif_process_buffer_complete(common);
442                         } else if (1 == fid) {
443                                 /* odd field */
444                                 spin_lock(&common->irqlock);
445                                 if (list_empty(&common->dma_queue) ||
446                                     (common->cur_frm != common->next_frm)) {
447                                         spin_unlock(&common->irqlock);
448                                         continue;
449                                 }
450                                 spin_unlock(&common->irqlock);
451 
452                                 vpif_schedule_next_buffer(common);
453                         }
454                 }
455         }
456         return IRQ_HANDLED;
457 }
458 
459 /**
460  * vpif_update_std_info() - update standard related info
461  * @ch: ptr to channel object
462  *
463  * For a given standard selected by application, update values
464  * in the device data structures
465  */
466 static int vpif_update_std_info(struct channel_obj *ch)
467 {
468         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
469         struct vpif_params *vpifparams = &ch->vpifparams;
470         const struct vpif_channel_config_params *config;
471         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
472         struct video_obj *vid_ch = &ch->video;
473         int index;
474 
475         vpif_dbg(2, debug, "vpif_update_std_info\n");
476 
477         for (index = 0; index < vpif_ch_params_count; index++) {
478                 config = &vpif_ch_params[index];
479                 if (config->hd_sd == 0) {
480                         vpif_dbg(2, debug, "SD format\n");
481                         if (config->stdid & vid_ch->stdid) {
482                                 memcpy(std_info, config, sizeof(*config));
483                                 break;
484                         }
485                 } else {
486                         vpif_dbg(2, debug, "HD format\n");
487                         if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
488                                 sizeof(vid_ch->dv_timings))) {
489                                 memcpy(std_info, config, sizeof(*config));
490                                 break;
491                         }
492                 }
493         }
494 
495         /* standard not found */
496         if (index == vpif_ch_params_count)
497                 return -EINVAL;
498 
499         common->fmt.fmt.pix.width = std_info->width;
500         common->width = std_info->width;
501         common->fmt.fmt.pix.height = std_info->height;
502         common->height = std_info->height;
503         common->fmt.fmt.pix.sizeimage = common->height * common->width * 2;
504         common->fmt.fmt.pix.bytesperline = std_info->width;
505         vpifparams->video_params.hpitch = std_info->width;
506         vpifparams->video_params.storage_mode = std_info->frm_fmt;
507 
508         if (vid_ch->stdid)
509                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
510         else
511                 common->fmt.fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
512 
513         if (ch->vpifparams.std_info.frm_fmt)
514                 common->fmt.fmt.pix.field = V4L2_FIELD_NONE;
515         else
516                 common->fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
517 
518         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
519                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
520         else
521                 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
522 
523         common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
524 
525         return 0;
526 }
527 
528 /**
529  * vpif_calculate_offsets : This function calculates buffers offsets
530  * @ch : ptr to channel object
531  *
532  * This function calculates buffer offsets for Y and C in the top and
533  * bottom field
534  */
535 static void vpif_calculate_offsets(struct channel_obj *ch)
536 {
537         unsigned int hpitch, sizeimage;
538         struct video_obj *vid_ch = &(ch->video);
539         struct vpif_params *vpifparams = &ch->vpifparams;
540         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
541         enum v4l2_field field = common->fmt.fmt.pix.field;
542 
543         vpif_dbg(2, debug, "vpif_calculate_offsets\n");
544 
545         if (V4L2_FIELD_ANY == field) {
546                 if (vpifparams->std_info.frm_fmt)
547                         vid_ch->buf_field = V4L2_FIELD_NONE;
548                 else
549                         vid_ch->buf_field = V4L2_FIELD_INTERLACED;
550         } else
551                 vid_ch->buf_field = common->fmt.fmt.pix.field;
552 
553         sizeimage = common->fmt.fmt.pix.sizeimage;
554 
555         hpitch = common->fmt.fmt.pix.bytesperline;
556 
557         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
558             (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
559                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
560                 common->ytop_off = 0;
561                 common->ybtm_off = hpitch;
562                 common->ctop_off = sizeimage / 2;
563                 common->cbtm_off = sizeimage / 2 + hpitch;
564         } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
565                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
566                 common->ytop_off = 0;
567                 common->ybtm_off = sizeimage / 4;
568                 common->ctop_off = sizeimage / 2;
569                 common->cbtm_off = common->ctop_off + sizeimage / 4;
570         } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
571                 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
572                 common->ybtm_off = 0;
573                 common->ytop_off = sizeimage / 4;
574                 common->cbtm_off = sizeimage / 2;
575                 common->ctop_off = common->cbtm_off + sizeimage / 4;
576         }
577         if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
578             (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
579                 vpifparams->video_params.storage_mode = 1;
580         else
581                 vpifparams->video_params.storage_mode = 0;
582 
583         if (1 == vpifparams->std_info.frm_fmt)
584                 vpifparams->video_params.hpitch =
585                     common->fmt.fmt.pix.bytesperline;
586         else {
587                 if ((field == V4L2_FIELD_ANY)
588                     || (field == V4L2_FIELD_INTERLACED))
589                         vpifparams->video_params.hpitch =
590                             common->fmt.fmt.pix.bytesperline * 2;
591                 else
592                         vpifparams->video_params.hpitch =
593                             common->fmt.fmt.pix.bytesperline;
594         }
595 
596         ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
597 }
598 
599 /**
600  * vpif_get_default_field() - Get default field type based on interface
601  * @vpif_params - ptr to vpif params
602  */
603 static inline enum v4l2_field vpif_get_default_field(
604                                 struct vpif_interface *iface)
605 {
606         return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
607                                                 V4L2_FIELD_INTERLACED;
608 }
609 
610 /**
611  * vpif_config_addr() - function to configure buffer address in vpif
612  * @ch - channel ptr
613  * @muxmode - channel mux mode
614  */
615 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
616 {
617         struct common_obj *common;
618 
619         vpif_dbg(2, debug, "vpif_config_addr\n");
620 
621         common = &(ch->common[VPIF_VIDEO_INDEX]);
622 
623         if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
624                 common->set_addr = ch1_set_videobuf_addr;
625         else if (2 == muxmode)
626                 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
627         else
628                 common->set_addr = ch0_set_videobuf_addr;
629 }
630 
631 /**
632  * vpif_input_to_subdev() - Maps input to sub device
633  * @vpif_cfg - global config ptr
634  * @chan_cfg - channel config ptr
635  * @input_index - Given input index from application
636  *
637  * lookup the sub device information for a given input index.
638  * we report all the inputs to application. inputs table also
639  * has sub device name for the each input
640  */
641 static int vpif_input_to_subdev(
642                 struct vpif_capture_config *vpif_cfg,
643                 struct vpif_capture_chan_config *chan_cfg,
644                 int input_index)
645 {
646         struct vpif_subdev_info *subdev_info;
647         const char *subdev_name;
648         int i;
649 
650         vpif_dbg(2, debug, "vpif_input_to_subdev\n");
651 
652         subdev_name = chan_cfg->inputs[input_index].subdev_name;
653         if (subdev_name == NULL)
654                 return -1;
655 
656         /* loop through the sub device list to get the sub device info */
657         for (i = 0; i < vpif_cfg->subdev_count; i++) {
658                 subdev_info = &vpif_cfg->subdev_info[i];
659                 if (!strcmp(subdev_info->name, subdev_name))
660                         return i;
661         }
662         return -1;
663 }
664 
665 /**
666  * vpif_set_input() - Select an input
667  * @vpif_cfg - global config ptr
668  * @ch - channel
669  * @_index - Given input index from application
670  *
671  * Select the given input.
672  */
673 static int vpif_set_input(
674                 struct vpif_capture_config *vpif_cfg,
675                 struct channel_obj *ch,
676                 int index)
677 {
678         struct vpif_capture_chan_config *chan_cfg =
679                         &vpif_cfg->chan_config[ch->channel_id];
680         struct vpif_subdev_info *subdev_info = NULL;
681         struct v4l2_subdev *sd = NULL;
682         u32 input = 0, output = 0;
683         int sd_index;
684         int ret;
685 
686         sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
687         if (sd_index >= 0) {
688                 sd = vpif_obj.sd[sd_index];
689                 subdev_info = &vpif_cfg->subdev_info[sd_index];
690         }
691 
692         /* first setup input path from sub device to vpif */
693         if (sd && vpif_cfg->setup_input_path) {
694                 ret = vpif_cfg->setup_input_path(ch->channel_id,
695                                        subdev_info->name);
696                 if (ret < 0) {
697                         vpif_dbg(1, debug, "couldn't setup input path for the" \
698                         " sub device %s, for input index %d\n",
699                         subdev_info->name, index);
700                         return ret;
701                 }
702         }
703 
704         if (sd) {
705                 input = chan_cfg->inputs[index].input_route;
706                 output = chan_cfg->inputs[index].output_route;
707                 ret = v4l2_subdev_call(sd, video, s_routing,
708                                 input, output, 0);
709                 if (ret < 0 && ret != -ENOIOCTLCMD) {
710                         vpif_dbg(1, debug, "Failed to set input\n");
711                         return ret;
712                 }
713         }
714         ch->input_idx = index;
715         ch->sd = sd;
716         /* copy interface parameters to vpif */
717         ch->vpifparams.iface = chan_cfg->vpif_if;
718 
719         /* update tvnorms from the sub device input info */
720         ch->video_dev.tvnorms = chan_cfg->inputs[index].input.std;
721         return 0;
722 }
723 
724 /**
725  * vpif_querystd() - querystd handler
726  * @file: file ptr
727  * @priv: file handle
728  * @std_id: ptr to std id
729  *
730  * This function is called to detect standard at the selected input
731  */
732 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
733 {
734         struct video_device *vdev = video_devdata(file);
735         struct channel_obj *ch = video_get_drvdata(vdev);
736         int ret = 0;
737 
738         vpif_dbg(2, debug, "vpif_querystd\n");
739 
740         /* Call querystd function of decoder device */
741         ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
742 
743         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
744                 return -ENODATA;
745         if (ret) {
746                 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
747                 return ret;
748         }
749 
750         return 0;
751 }
752 
753 /**
754  * vpif_g_std() - get STD handler
755  * @file: file ptr
756  * @priv: file handle
757  * @std_id: ptr to std id
758  */
759 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
760 {
761         struct vpif_capture_config *config = vpif_dev->platform_data;
762         struct video_device *vdev = video_devdata(file);
763         struct channel_obj *ch = video_get_drvdata(vdev);
764         struct vpif_capture_chan_config *chan_cfg;
765         struct v4l2_input input;
766 
767         vpif_dbg(2, debug, "vpif_g_std\n");
768 
769         if (config->chan_config[ch->channel_id].inputs == NULL)
770                 return -ENODATA;
771 
772         chan_cfg = &config->chan_config[ch->channel_id];
773         input = chan_cfg->inputs[ch->input_idx].input;
774         if (input.capabilities != V4L2_IN_CAP_STD)
775                 return -ENODATA;
776 
777         *std = ch->video.stdid;
778         return 0;
779 }
780 
781 /**
782  * vpif_s_std() - set STD handler
783  * @file: file ptr
784  * @priv: file handle
785  * @std_id: ptr to std id
786  */
787 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id std_id)
788 {
789         struct vpif_capture_config *config = vpif_dev->platform_data;
790         struct video_device *vdev = video_devdata(file);
791         struct channel_obj *ch = video_get_drvdata(vdev);
792         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
793         struct vpif_capture_chan_config *chan_cfg;
794         struct v4l2_input input;
795         int ret;
796 
797         vpif_dbg(2, debug, "vpif_s_std\n");
798 
799         if (config->chan_config[ch->channel_id].inputs == NULL)
800                 return -ENODATA;
801 
802         chan_cfg = &config->chan_config[ch->channel_id];
803         input = chan_cfg->inputs[ch->input_idx].input;
804         if (input.capabilities != V4L2_IN_CAP_STD)
805                 return -ENODATA;
806 
807         if (vb2_is_busy(&common->buffer_queue))
808                 return -EBUSY;
809 
810         /* Call encoder subdevice function to set the standard */
811         ch->video.stdid = std_id;
812         memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
813 
814         /* Get the information about the standard */
815         if (vpif_update_std_info(ch)) {
816                 vpif_err("Error getting the standard info\n");
817                 return -EINVAL;
818         }
819 
820         /* set standard in the sub device */
821         ret = v4l2_subdev_call(ch->sd, video, s_std, std_id);
822         if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
823                 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
824                 return ret;
825         }
826         return 0;
827 }
828 
829 /**
830  * vpif_enum_input() - ENUMINPUT handler
831  * @file: file ptr
832  * @priv: file handle
833  * @input: ptr to input structure
834  */
835 static int vpif_enum_input(struct file *file, void *priv,
836                                 struct v4l2_input *input)
837 {
838 
839         struct vpif_capture_config *config = vpif_dev->platform_data;
840         struct video_device *vdev = video_devdata(file);
841         struct channel_obj *ch = video_get_drvdata(vdev);
842         struct vpif_capture_chan_config *chan_cfg;
843 
844         chan_cfg = &config->chan_config[ch->channel_id];
845 
846         if (input->index >= chan_cfg->input_count)
847                 return -EINVAL;
848 
849         memcpy(input, &chan_cfg->inputs[input->index].input,
850                 sizeof(*input));
851         return 0;
852 }
853 
854 /**
855  * vpif_g_input() - Get INPUT handler
856  * @file: file ptr
857  * @priv: file handle
858  * @index: ptr to input index
859  */
860 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
861 {
862         struct video_device *vdev = video_devdata(file);
863         struct channel_obj *ch = video_get_drvdata(vdev);
864 
865         *index = ch->input_idx;
866         return 0;
867 }
868 
869 /**
870  * vpif_s_input() - Set INPUT handler
871  * @file: file ptr
872  * @priv: file handle
873  * @index: input index
874  */
875 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
876 {
877         struct vpif_capture_config *config = vpif_dev->platform_data;
878         struct video_device *vdev = video_devdata(file);
879         struct channel_obj *ch = video_get_drvdata(vdev);
880         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
881         struct vpif_capture_chan_config *chan_cfg;
882 
883         chan_cfg = &config->chan_config[ch->channel_id];
884 
885         if (index >= chan_cfg->input_count)
886                 return -EINVAL;
887 
888         if (vb2_is_busy(&common->buffer_queue))
889                 return -EBUSY;
890 
891         return vpif_set_input(config, ch, index);
892 }
893 
894 /**
895  * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
896  * @file: file ptr
897  * @priv: file handle
898  * @index: input index
899  */
900 static int vpif_enum_fmt_vid_cap(struct file *file, void  *priv,
901                                         struct v4l2_fmtdesc *fmt)
902 {
903         struct video_device *vdev = video_devdata(file);
904         struct channel_obj *ch = video_get_drvdata(vdev);
905 
906         if (fmt->index != 0) {
907                 vpif_dbg(1, debug, "Invalid format index\n");
908                 return -EINVAL;
909         }
910 
911         /* Fill in the information about format */
912         if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
913                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
914                 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
915                 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
916         } else {
917                 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
918                 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
919                 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
920         }
921         return 0;
922 }
923 
924 /**
925  * vpif_try_fmt_vid_cap() - TRY_FMT handler
926  * @file: file ptr
927  * @priv: file handle
928  * @fmt: ptr to v4l2 format structure
929  */
930 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
931                                 struct v4l2_format *fmt)
932 {
933         struct video_device *vdev = video_devdata(file);
934         struct channel_obj *ch = video_get_drvdata(vdev);
935         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
936         struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
937         struct vpif_params *vpif_params = &ch->vpifparams;
938 
939         /*
940          * to supress v4l-compliance warnings silently correct
941          * the pixelformat
942          */
943         if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
944                 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8)
945                         pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
946         } else {
947                 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
948                         pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
949         }
950 
951         common->fmt.fmt.pix.pixelformat = pixfmt->pixelformat;
952 
953         vpif_update_std_info(ch);
954 
955         pixfmt->field = common->fmt.fmt.pix.field;
956         pixfmt->colorspace = common->fmt.fmt.pix.colorspace;
957         pixfmt->bytesperline = common->fmt.fmt.pix.width;
958         pixfmt->width = common->fmt.fmt.pix.width;
959         pixfmt->height = common->fmt.fmt.pix.height;
960         pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height * 2;
961         pixfmt->priv = 0;
962 
963         return 0;
964 }
965 
966 
967 /**
968  * vpif_g_fmt_vid_cap() - Set INPUT handler
969  * @file: file ptr
970  * @priv: file handle
971  * @fmt: ptr to v4l2 format structure
972  */
973 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
974                                 struct v4l2_format *fmt)
975 {
976         struct video_device *vdev = video_devdata(file);
977         struct channel_obj *ch = video_get_drvdata(vdev);
978         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
979 
980         /* Check the validity of the buffer type */
981         if (common->fmt.type != fmt->type)
982                 return -EINVAL;
983 
984         /* Fill in the information about format */
985         *fmt = common->fmt;
986         return 0;
987 }
988 
989 /**
990  * vpif_s_fmt_vid_cap() - Set FMT handler
991  * @file: file ptr
992  * @priv: file handle
993  * @fmt: ptr to v4l2 format structure
994  */
995 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
996                                 struct v4l2_format *fmt)
997 {
998         struct video_device *vdev = video_devdata(file);
999         struct channel_obj *ch = video_get_drvdata(vdev);
1000         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1001         int ret;
1002 
1003         vpif_dbg(2, debug, "%s\n", __func__);
1004 
1005         if (vb2_is_busy(&common->buffer_queue))
1006                 return -EBUSY;
1007 
1008         ret = vpif_try_fmt_vid_cap(file, priv, fmt);
1009         if (ret)
1010                 return ret;
1011 
1012         /* store the format in the channel object */
1013         common->fmt = *fmt;
1014         return 0;
1015 }
1016 
1017 /**
1018  * vpif_querycap() - QUERYCAP handler
1019  * @file: file ptr
1020  * @priv: file handle
1021  * @cap: ptr to v4l2_capability structure
1022  */
1023 static int vpif_querycap(struct file *file, void  *priv,
1024                                 struct v4l2_capability *cap)
1025 {
1026         struct vpif_capture_config *config = vpif_dev->platform_data;
1027 
1028         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1029         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1030         strlcpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
1031         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1032                  dev_name(vpif_dev));
1033         strlcpy(cap->card, config->card_name, sizeof(cap->card));
1034 
1035         return 0;
1036 }
1037 
1038 /**
1039  * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1040  * @file: file ptr
1041  * @priv: file handle
1042  * @timings: input timings
1043  */
1044 static int
1045 vpif_enum_dv_timings(struct file *file, void *priv,
1046                      struct v4l2_enum_dv_timings *timings)
1047 {
1048         struct vpif_capture_config *config = vpif_dev->platform_data;
1049         struct video_device *vdev = video_devdata(file);
1050         struct channel_obj *ch = video_get_drvdata(vdev);
1051         struct vpif_capture_chan_config *chan_cfg;
1052         struct v4l2_input input;
1053         int ret;
1054 
1055         if (config->chan_config[ch->channel_id].inputs == NULL)
1056                 return -ENODATA;
1057 
1058         chan_cfg = &config->chan_config[ch->channel_id];
1059         input = chan_cfg->inputs[ch->input_idx].input;
1060         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1061                 return -ENODATA;
1062 
1063         timings->pad = 0;
1064 
1065         ret = v4l2_subdev_call(ch->sd, pad, enum_dv_timings, timings);
1066         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1067                 return -EINVAL;
1068 
1069         return ret;
1070 }
1071 
1072 /**
1073  * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1074  * @file: file ptr
1075  * @priv: file handle
1076  * @timings: input timings
1077  */
1078 static int
1079 vpif_query_dv_timings(struct file *file, void *priv,
1080                       struct v4l2_dv_timings *timings)
1081 {
1082         struct vpif_capture_config *config = vpif_dev->platform_data;
1083         struct video_device *vdev = video_devdata(file);
1084         struct channel_obj *ch = video_get_drvdata(vdev);
1085         struct vpif_capture_chan_config *chan_cfg;
1086         struct v4l2_input input;
1087         int ret;
1088 
1089         if (config->chan_config[ch->channel_id].inputs == NULL)
1090                 return -ENODATA;
1091 
1092         chan_cfg = &config->chan_config[ch->channel_id];
1093         input = chan_cfg->inputs[ch->input_idx].input;
1094         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1095                 return -ENODATA;
1096 
1097         ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1098         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1099                 return -ENODATA;
1100 
1101         return ret;
1102 }
1103 
1104 /**
1105  * vpif_s_dv_timings() - S_DV_TIMINGS handler
1106  * @file: file ptr
1107  * @priv: file handle
1108  * @timings: digital video timings
1109  */
1110 static int vpif_s_dv_timings(struct file *file, void *priv,
1111                 struct v4l2_dv_timings *timings)
1112 {
1113         struct vpif_capture_config *config = vpif_dev->platform_data;
1114         struct video_device *vdev = video_devdata(file);
1115         struct channel_obj *ch = video_get_drvdata(vdev);
1116         struct vpif_params *vpifparams = &ch->vpifparams;
1117         struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1118         struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1119         struct video_obj *vid_ch = &ch->video;
1120         struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1121         struct vpif_capture_chan_config *chan_cfg;
1122         struct v4l2_input input;
1123         int ret;
1124 
1125         if (config->chan_config[ch->channel_id].inputs == NULL)
1126                 return -ENODATA;
1127 
1128         chan_cfg = &config->chan_config[ch->channel_id];
1129         input = chan_cfg->inputs[ch->input_idx].input;
1130         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1131                 return -ENODATA;
1132 
1133         if (timings->type != V4L2_DV_BT_656_1120) {
1134                 vpif_dbg(2, debug, "Timing type not defined\n");
1135                 return -EINVAL;
1136         }
1137 
1138         if (vb2_is_busy(&common->buffer_queue))
1139                 return -EBUSY;
1140 
1141         /* Configure subdevice timings, if any */
1142         ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1143         if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1144                 ret = 0;
1145         if (ret < 0) {
1146                 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1147                 return ret;
1148         }
1149 
1150         if (!(timings->bt.width && timings->bt.height &&
1151                                 (timings->bt.hbackporch ||
1152                                  timings->bt.hfrontporch ||
1153                                  timings->bt.hsync) &&
1154                                 timings->bt.vfrontporch &&
1155                                 (timings->bt.vbackporch ||
1156                                  timings->bt.vsync))) {
1157                 vpif_dbg(2, debug, "Timings for width, height, "
1158                                 "horizontal back porch, horizontal sync, "
1159                                 "horizontal front porch, vertical back porch, "
1160                                 "vertical sync and vertical back porch "
1161                                 "must be defined\n");
1162                 return -EINVAL;
1163         }
1164 
1165         vid_ch->dv_timings = *timings;
1166 
1167         /* Configure video port timings */
1168 
1169         std_info->eav2sav = V4L2_DV_BT_BLANKING_WIDTH(bt) - 8;
1170         std_info->sav2eav = bt->width;
1171 
1172         std_info->l1 = 1;
1173         std_info->l3 = bt->vsync + bt->vbackporch + 1;
1174 
1175         std_info->vsize = V4L2_DV_BT_FRAME_HEIGHT(bt);
1176         if (bt->interlaced) {
1177                 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1178                         std_info->l5 = std_info->vsize/2 -
1179                                 (bt->vfrontporch - 1);
1180                         std_info->l7 = std_info->vsize/2 + 1;
1181                         std_info->l9 = std_info->l7 + bt->il_vsync +
1182                                 bt->il_vbackporch + 1;
1183                         std_info->l11 = std_info->vsize -
1184                                 (bt->il_vfrontporch - 1);
1185                 } else {
1186                         vpif_dbg(2, debug, "Required timing values for "
1187                                         "interlaced BT format missing\n");
1188                         return -EINVAL;
1189                 }
1190         } else {
1191                 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1192         }
1193         strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1194         std_info->width = bt->width;
1195         std_info->height = bt->height;
1196         std_info->frm_fmt = bt->interlaced ? 0 : 1;
1197         std_info->ycmux_mode = 0;
1198         std_info->capture_format = 0;
1199         std_info->vbi_supported = 0;
1200         std_info->hd_sd = 1;
1201         std_info->stdid = 0;
1202 
1203         vid_ch->stdid = 0;
1204         return 0;
1205 }
1206 
1207 /**
1208  * vpif_g_dv_timings() - G_DV_TIMINGS handler
1209  * @file: file ptr
1210  * @priv: file handle
1211  * @timings: digital video timings
1212  */
1213 static int vpif_g_dv_timings(struct file *file, void *priv,
1214                 struct v4l2_dv_timings *timings)
1215 {
1216         struct vpif_capture_config *config = vpif_dev->platform_data;
1217         struct video_device *vdev = video_devdata(file);
1218         struct channel_obj *ch = video_get_drvdata(vdev);
1219         struct video_obj *vid_ch = &ch->video;
1220         struct vpif_capture_chan_config *chan_cfg;
1221         struct v4l2_input input;
1222 
1223         if (config->chan_config[ch->channel_id].inputs == NULL)
1224                 return -ENODATA;
1225 
1226         chan_cfg = &config->chan_config[ch->channel_id];
1227         input = chan_cfg->inputs[ch->input_idx].input;
1228         if (input.capabilities != V4L2_IN_CAP_DV_TIMINGS)
1229                 return -ENODATA;
1230 
1231         *timings = vid_ch->dv_timings;
1232 
1233         return 0;
1234 }
1235 
1236 /*
1237  * vpif_log_status() - Status information
1238  * @file: file ptr
1239  * @priv: file handle
1240  *
1241  * Returns zero.
1242  */
1243 static int vpif_log_status(struct file *filep, void *priv)
1244 {
1245         /* status for sub devices */
1246         v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1247 
1248         return 0;
1249 }
1250 
1251 /* vpif capture ioctl operations */
1252 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1253         .vidioc_querycap                = vpif_querycap,
1254         .vidioc_enum_fmt_vid_cap        = vpif_enum_fmt_vid_cap,
1255         .vidioc_g_fmt_vid_cap           = vpif_g_fmt_vid_cap,
1256         .vidioc_s_fmt_vid_cap           = vpif_s_fmt_vid_cap,
1257         .vidioc_try_fmt_vid_cap         = vpif_try_fmt_vid_cap,
1258 
1259         .vidioc_enum_input              = vpif_enum_input,
1260         .vidioc_s_input                 = vpif_s_input,
1261         .vidioc_g_input                 = vpif_g_input,
1262 
1263         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1264         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1265         .vidioc_querybuf                = vb2_ioctl_querybuf,
1266         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1267         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1268         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1269         .vidioc_streamon                = vb2_ioctl_streamon,
1270         .vidioc_streamoff               = vb2_ioctl_streamoff,
1271 
1272         .vidioc_querystd                = vpif_querystd,
1273         .vidioc_s_std                   = vpif_s_std,
1274         .vidioc_g_std                   = vpif_g_std,
1275 
1276         .vidioc_enum_dv_timings         = vpif_enum_dv_timings,
1277         .vidioc_query_dv_timings        = vpif_query_dv_timings,
1278         .vidioc_s_dv_timings            = vpif_s_dv_timings,
1279         .vidioc_g_dv_timings            = vpif_g_dv_timings,
1280 
1281         .vidioc_log_status              = vpif_log_status,
1282 };
1283 
1284 /* vpif file operations */
1285 static struct v4l2_file_operations vpif_fops = {
1286         .owner = THIS_MODULE,
1287         .open = v4l2_fh_open,
1288         .release = vb2_fop_release,
1289         .unlocked_ioctl = video_ioctl2,
1290         .mmap = vb2_fop_mmap,
1291         .poll = vb2_fop_poll
1292 };
1293 
1294 /**
1295  * initialize_vpif() - Initialize vpif data structures
1296  *
1297  * Allocate memory for data structures and initialize them
1298  */
1299 static int initialize_vpif(void)
1300 {
1301         int err, i, j;
1302         int free_channel_objects_index;
1303 
1304         /* Allocate memory for six channel objects */
1305         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1306                 vpif_obj.dev[i] =
1307                     kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
1308                 /* If memory allocation fails, return error */
1309                 if (!vpif_obj.dev[i]) {
1310                         free_channel_objects_index = i;
1311                         err = -ENOMEM;
1312                         goto vpif_init_free_channel_objects;
1313                 }
1314         }
1315         return 0;
1316 
1317 vpif_init_free_channel_objects:
1318         for (j = 0; j < free_channel_objects_index; j++)
1319                 kfree(vpif_obj.dev[j]);
1320         return err;
1321 }
1322 
1323 static int vpif_async_bound(struct v4l2_async_notifier *notifier,
1324                             struct v4l2_subdev *subdev,
1325                             struct v4l2_async_subdev *asd)
1326 {
1327         int i;
1328 
1329         for (i = 0; i < vpif_obj.config->subdev_count; i++)
1330                 if (!strcmp(vpif_obj.config->subdev_info[i].name,
1331                             subdev->name)) {
1332                         vpif_obj.sd[i] = subdev;
1333                         return 0;
1334                 }
1335 
1336         return -EINVAL;
1337 }
1338 
1339 static int vpif_probe_complete(void)
1340 {
1341         struct common_obj *common;
1342         struct video_device *vdev;
1343         struct channel_obj *ch;
1344         struct vb2_queue *q;
1345         int j, err, k;
1346 
1347         for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
1348                 ch = vpif_obj.dev[j];
1349                 ch->channel_id = j;
1350                 common = &(ch->common[VPIF_VIDEO_INDEX]);
1351                 spin_lock_init(&common->irqlock);
1352                 mutex_init(&common->lock);
1353 
1354                 /* select input 0 */
1355                 err = vpif_set_input(vpif_obj.config, ch, 0);
1356                 if (err)
1357                         goto probe_out;
1358 
1359                 /* set initial format */
1360                 ch->video.stdid = V4L2_STD_525_60;
1361                 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1362                 vpif_update_std_info(ch);
1363 
1364                 /* Initialize vb2 queue */
1365                 q = &common->buffer_queue;
1366                 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1367                 q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1368                 q->drv_priv = ch;
1369                 q->ops = &video_qops;
1370                 q->mem_ops = &vb2_dma_contig_memops;
1371                 q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1372                 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1373                 q->min_buffers_needed = 1;
1374                 q->lock = &common->lock;
1375 
1376                 err = vb2_queue_init(q);
1377                 if (err) {
1378                         vpif_err("vpif_capture: vb2_queue_init() failed\n");
1379                         goto probe_out;
1380                 }
1381 
1382                 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1383                 if (IS_ERR(common->alloc_ctx)) {
1384                         vpif_err("Failed to get the context\n");
1385                         err = PTR_ERR(common->alloc_ctx);
1386                         goto probe_out;
1387                 }
1388 
1389                 INIT_LIST_HEAD(&common->dma_queue);
1390 
1391                 /* Initialize the video_device structure */
1392                 vdev = &ch->video_dev;
1393                 strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
1394                 vdev->release = video_device_release_empty;
1395                 vdev->fops = &vpif_fops;
1396                 vdev->ioctl_ops = &vpif_ioctl_ops;
1397                 vdev->v4l2_dev = &vpif_obj.v4l2_dev;
1398                 vdev->vfl_dir = VFL_DIR_RX;
1399                 vdev->queue = q;
1400                 vdev->lock = &common->lock;
1401                 video_set_drvdata(&ch->video_dev, ch);
1402                 err = video_register_device(vdev,
1403                                             VFL_TYPE_GRABBER, (j ? 1 : 0));
1404                 if (err)
1405                         goto probe_out;
1406         }
1407 
1408         v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
1409         return 0;
1410 
1411 probe_out:
1412         for (k = 0; k < j; k++) {
1413                 /* Get the pointer to the channel object */
1414                 ch = vpif_obj.dev[k];
1415                 common = &ch->common[k];
1416                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1417                 /* Unregister video device */
1418                 video_unregister_device(&ch->video_dev);
1419         }
1420         kfree(vpif_obj.sd);
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         struct i2c_adapter *i2c_adap;
1442         struct resource *res;
1443         int subdev_count;
1444         int res_idx = 0;
1445         int i, err;
1446 
1447         vpif_dev = &pdev->dev;
1448 
1449         err = initialize_vpif();
1450         if (err) {
1451                 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
1452                 return err;
1453         }
1454 
1455         err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
1456         if (err) {
1457                 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
1458                 return err;
1459         }
1460 
1461         while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
1462                 err = devm_request_irq(&pdev->dev, res->start, vpif_channel_isr,
1463                                         IRQF_SHARED, VPIF_DRIVER_NAME,
1464                                         (void *)(&vpif_obj.dev[res_idx]->
1465                                         channel_id));
1466                 if (err) {
1467                         err = -EINVAL;
1468                         goto vpif_unregister;
1469                 }
1470                 res_idx++;
1471         }
1472 
1473         vpif_obj.config = pdev->dev.platform_data;
1474 
1475         subdev_count = vpif_obj.config->subdev_count;
1476         vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
1477                                 GFP_KERNEL);
1478         if (vpif_obj.sd == NULL) {
1479                 vpif_err("unable to allocate memory for subdevice pointers\n");
1480                 err = -ENOMEM;
1481                 goto vpif_unregister;
1482         }
1483 
1484         if (!vpif_obj.config->asd_sizes) {
1485                 i2c_adap = i2c_get_adapter(1);
1486                 for (i = 0; i < subdev_count; i++) {
1487                         subdevdata = &vpif_obj.config->subdev_info[i];
1488                         vpif_obj.sd[i] =
1489                                 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
1490                                                           i2c_adap,
1491                                                           &subdevdata->
1492                                                           board_info,
1493                                                           NULL);
1494 
1495                         if (!vpif_obj.sd[i]) {
1496                                 vpif_err("Error registering v4l2 subdevice\n");
1497                                 err = -ENODEV;
1498                                 goto probe_subdev_out;
1499                         }
1500                         v4l2_info(&vpif_obj.v4l2_dev,
1501                                   "registered sub device %s\n",
1502                                    subdevdata->name);
1503                 }
1504                 vpif_probe_complete();
1505         } else {
1506                 vpif_obj.notifier.subdevs = vpif_obj.config->asd;
1507                 vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
1508                 vpif_obj.notifier.bound = vpif_async_bound;
1509                 vpif_obj.notifier.complete = vpif_async_complete;
1510                 err = v4l2_async_notifier_register(&vpif_obj.v4l2_dev,
1511                                                    &vpif_obj.notifier);
1512                 if (err) {
1513                         vpif_err("Error registering async notifier\n");
1514                         err = -EINVAL;
1515                         goto probe_subdev_out;
1516                 }
1517         }
1518 
1519         return 0;
1520 
1521 probe_subdev_out:
1522         /* free sub devices memory */
1523         kfree(vpif_obj.sd);
1524 vpif_unregister:
1525         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1526 
1527         return err;
1528 }
1529 
1530 /**
1531  * vpif_remove() - driver remove handler
1532  * @device: ptr to platform device structure
1533  *
1534  * The vidoe device is unregistered
1535  */
1536 static int vpif_remove(struct platform_device *device)
1537 {
1538         struct common_obj *common;
1539         struct channel_obj *ch;
1540         int i;
1541 
1542         v4l2_device_unregister(&vpif_obj.v4l2_dev);
1543 
1544         kfree(vpif_obj.sd);
1545         /* un-register device */
1546         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1547                 /* Get the pointer to the channel object */
1548                 ch = vpif_obj.dev[i];
1549                 common = &ch->common[VPIF_VIDEO_INDEX];
1550                 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1551                 /* Unregister video device */
1552                 video_unregister_device(&ch->video_dev);
1553                 kfree(vpif_obj.dev[i]);
1554         }
1555         return 0;
1556 }
1557 
1558 #ifdef CONFIG_PM_SLEEP
1559 /**
1560  * vpif_suspend: vpif device suspend
1561  */
1562 static int vpif_suspend(struct device *dev)
1563 {
1564 
1565         struct common_obj *common;
1566         struct channel_obj *ch;
1567         int i;
1568 
1569         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1570                 /* Get the pointer to the channel object */
1571                 ch = vpif_obj.dev[i];
1572                 common = &ch->common[VPIF_VIDEO_INDEX];
1573 
1574                 if (!vb2_start_streaming_called(&common->buffer_queue))
1575                         continue;
1576 
1577                 mutex_lock(&common->lock);
1578                 /* Disable channel */
1579                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1580                         enable_channel0(0);
1581                         channel0_intr_enable(0);
1582                 }
1583                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1584                         ycmux_mode == 2) {
1585                         enable_channel1(0);
1586                         channel1_intr_enable(0);
1587                 }
1588                 mutex_unlock(&common->lock);
1589         }
1590 
1591         return 0;
1592 }
1593 
1594 /*
1595  * vpif_resume: vpif device suspend
1596  */
1597 static int vpif_resume(struct device *dev)
1598 {
1599         struct common_obj *common;
1600         struct channel_obj *ch;
1601         int i;
1602 
1603         for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
1604                 /* Get the pointer to the channel object */
1605                 ch = vpif_obj.dev[i];
1606                 common = &ch->common[VPIF_VIDEO_INDEX];
1607 
1608                 if (!vb2_start_streaming_called(&common->buffer_queue))
1609                         continue;
1610 
1611                 mutex_lock(&common->lock);
1612                 /* Enable channel */
1613                 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
1614                         enable_channel0(1);
1615                         channel0_intr_enable(1);
1616                 }
1617                 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
1618                         ycmux_mode == 2) {
1619                         enable_channel1(1);
1620                         channel1_intr_enable(1);
1621                 }
1622                 mutex_unlock(&common->lock);
1623         }
1624 
1625         return 0;
1626 }
1627 #endif
1628 
1629 static SIMPLE_DEV_PM_OPS(vpif_pm_ops, vpif_suspend, vpif_resume);
1630 
1631 static __refdata struct platform_driver vpif_driver = {
1632         .driver = {
1633                 .name   = VPIF_DRIVER_NAME,
1634                 .pm     = &vpif_pm_ops,
1635         },
1636         .probe = vpif_probe,
1637         .remove = vpif_remove,
1638 };
1639 
1640 module_platform_driver(vpif_driver);
1641 

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