2 * Copyright (C) 2009 Texas Instruments Inc
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * TODO : add support for VBI & HBI data service
19 * add static buffer allocation
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/errno.h>
27 #include <linux/interrupt.h>
28 #include <linux/workqueue.h>
29 #include <linux/string.h>
30 #include <linux/videodev2.h>
31 #include <linux/wait.h>
32 #include <linux/time.h>
33 #include <linux/i2c.h>
34 #include <linux/platform_device.h>
36 #include <linux/slab.h>
37 #include <media/v4l2-device.h>
38 #include <media/v4l2-ioctl.h>
39 #include <media/v4l2-chip-ident.h>
41 #include "vpif_capture.h"
44 MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
45 MODULE_LICENSE("GPL");
46 MODULE_VERSION(VPIF_CAPTURE_VERSION);
48 #define vpif_err(fmt, arg...) v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
49 #define vpif_dbg(level, debug, fmt, arg...) \
50 v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
53 static u32 ch0_numbuffers = 3;
54 static u32 ch1_numbuffers = 3;
55 static u32 ch0_bufsize = 1920 * 1080 * 2;
56 static u32 ch1_bufsize = 720 * 576 * 2;
58 module_param(debug, int, 0644);
59 module_param(ch0_numbuffers, uint, S_IRUGO);
60 module_param(ch1_numbuffers, uint, S_IRUGO);
61 module_param(ch0_bufsize, uint, S_IRUGO);
62 module_param(ch1_bufsize, uint, S_IRUGO);
64 MODULE_PARM_DESC(debug, "Debug level 0-1");
65 MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)");
66 MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)");
67 MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)");
68 MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)");
70 static struct vpif_config_params config_params = {
74 .min_bufsize[0] = 720 * 480 * 2,
75 .min_bufsize[1] = 720 * 480 * 2,
76 .channel_bufsize[0] = 1920 * 1080 * 2,
77 .channel_bufsize[1] = 720 * 576 * 2,
80 /* global variables */
81 static struct vpif_device vpif_obj = { {NULL} };
82 static struct device *vpif_dev;
83 static void vpif_calculate_offsets(struct channel_obj *ch);
84 static void vpif_config_addr(struct channel_obj *ch, int muxmode);
87 * buffer_prepare : callback function for buffer prepare
88 * @vb: ptr to vb2_buffer
90 * This is the callback function for buffer prepare when vb2_qbuf()
91 * function is called. The buffer is prepared and user space virtual address
92 * or user address is converted into physical address
94 static int vpif_buffer_prepare(struct vb2_buffer *vb)
96 /* Get the file handle object and channel object */
97 struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
98 struct vb2_queue *q = vb->vb2_queue;
99 struct channel_obj *ch = fh->channel;
100 struct common_obj *common;
103 vpif_dbg(2, debug, "vpif_buffer_prepare\n");
105 common = &ch->common[VPIF_VIDEO_INDEX];
107 if (vb->state != VB2_BUF_STATE_ACTIVE &&
108 vb->state != VB2_BUF_STATE_PREPARED) {
109 vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
110 if (vb2_plane_vaddr(vb, 0) &&
111 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
113 addr = vb2_dma_contig_plane_dma_addr(vb, 0);
116 if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
117 !IS_ALIGNED((addr + common->ybtm_off), 8) ||
118 !IS_ALIGNED((addr + common->ctop_off), 8) ||
119 !IS_ALIGNED((addr + common->cbtm_off), 8))
125 vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n");
130 * vpif_buffer_queue_setup : Callback function for buffer setup.
133 * @nbuffers: ptr to number of buffers requested by application
134 * @nplanes:: contains number of distinct video planes needed to hold a frame
135 * @sizes[]: contains the size (in bytes) of each plane.
136 * @alloc_ctxs: ptr to allocation context
138 * This callback function is called when reqbuf() is called to adjust
139 * the buffer count and buffer size
141 static int vpif_buffer_queue_setup(struct vb2_queue *vq,
142 const struct v4l2_format *fmt,
143 unsigned int *nbuffers, unsigned int *nplanes,
144 unsigned int sizes[], void *alloc_ctxs[])
146 /* Get the file handle object and channel object */
147 struct vpif_fh *fh = vb2_get_drv_priv(vq);
148 struct channel_obj *ch = fh->channel;
149 struct common_obj *common;
152 common = &ch->common[VPIF_VIDEO_INDEX];
154 vpif_dbg(2, debug, "vpif_buffer_setup\n");
156 /* If memory type is not mmap, return */
157 if (V4L2_MEMORY_MMAP == common->memory) {
158 /* Calculate the size of the buffer */
159 size = config_params.channel_bufsize[ch->channel_id];
161 * Checking if the buffer size exceeds the available buffer
162 * ycmux_mode = 0 means 1 channel mode HD and
163 * ycmux_mode = 1 means 2 channels mode SD
165 if (ch->vpifparams.std_info.ycmux_mode == 0) {
166 if (config_params.video_limit[ch->channel_id])
167 while (size * *nbuffers >
168 (config_params.video_limit[0]
169 + config_params.video_limit[1]))
172 if (config_params.video_limit[ch->channel_id])
173 while (size * *nbuffers >
174 config_params.video_limit[ch->channel_id])
179 size = common->fmt.fmt.pix.sizeimage;
182 if (*nbuffers < config_params.min_numbuffers)
183 *nbuffers = config_params.min_numbuffers;
187 alloc_ctxs[0] = common->alloc_ctx;
193 * vpif_buffer_queue : Callback function to add buffer to DMA queue
194 * @vb: ptr to vb2_buffer
196 static void vpif_buffer_queue(struct vb2_buffer *vb)
198 /* Get the file handle object and channel object */
199 struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
200 struct channel_obj *ch = fh->channel;
201 struct vpif_cap_buffer *buf = container_of(vb,
202 struct vpif_cap_buffer, vb);
203 struct common_obj *common;
205 common = &ch->common[VPIF_VIDEO_INDEX];
207 vpif_dbg(2, debug, "vpif_buffer_queue\n");
209 /* add the buffer to the DMA queue */
210 list_add_tail(&buf->list, &common->dma_queue);
214 * vpif_buf_cleanup : Callback function to free buffer
215 * @vb: ptr to vb2_buffer
217 * This function is called from the videobuf2 layer to free memory
218 * allocated to the buffers
220 static void vpif_buf_cleanup(struct vb2_buffer *vb)
222 /* Get the file handle object and channel object */
223 struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
224 struct vpif_cap_buffer *buf = container_of(vb,
225 struct vpif_cap_buffer, vb);
226 struct channel_obj *ch = fh->channel;
227 struct common_obj *common;
230 common = &ch->common[VPIF_VIDEO_INDEX];
232 spin_lock_irqsave(&common->irqlock, flags);
233 if (vb->state == VB2_BUF_STATE_ACTIVE)
234 list_del_init(&buf->list);
235 spin_unlock_irqrestore(&common->irqlock, flags);
239 static void vpif_wait_prepare(struct vb2_queue *vq)
241 struct vpif_fh *fh = vb2_get_drv_priv(vq);
242 struct channel_obj *ch = fh->channel;
243 struct common_obj *common;
245 common = &ch->common[VPIF_VIDEO_INDEX];
246 mutex_unlock(&common->lock);
249 static void vpif_wait_finish(struct vb2_queue *vq)
251 struct vpif_fh *fh = vb2_get_drv_priv(vq);
252 struct channel_obj *ch = fh->channel;
253 struct common_obj *common;
255 common = &ch->common[VPIF_VIDEO_INDEX];
256 mutex_lock(&common->lock);
259 static int vpif_buffer_init(struct vb2_buffer *vb)
261 struct vpif_cap_buffer *buf = container_of(vb,
262 struct vpif_cap_buffer, vb);
264 INIT_LIST_HEAD(&buf->list);
269 static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] =
272 static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
274 struct vpif_capture_config *vpif_config_data =
275 vpif_dev->platform_data;
276 struct vpif_fh *fh = vb2_get_drv_priv(vq);
277 struct channel_obj *ch = fh->channel;
278 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
279 struct vpif_params *vpif = &ch->vpifparams;
280 unsigned long addr = 0;
283 /* If buffer queue is empty, return error */
284 if (list_empty(&common->dma_queue)) {
285 vpif_dbg(1, debug, "buffer queue is empty\n");
289 /* Get the next frame from the buffer queue */
290 common->cur_frm = common->next_frm = list_entry(common->dma_queue.next,
291 struct vpif_cap_buffer, list);
292 /* Remove buffer from the buffer queue */
293 list_del(&common->cur_frm->list);
294 /* Mark state of the current frame to active */
295 common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
296 /* Initialize field_id and started member */
299 addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
301 /* Calculate the offset for Y and C data in the buffer */
302 vpif_calculate_offsets(ch);
304 if ((vpif->std_info.frm_fmt &&
305 ((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) &&
306 (common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) ||
307 (!vpif->std_info.frm_fmt &&
308 (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
309 vpif_dbg(1, debug, "conflict in field format and std format\n");
313 /* configure 1 or 2 channel mode */
314 if (vpif_config_data->setup_input_channel_mode) {
315 ret = vpif_config_data->
316 setup_input_channel_mode(vpif->std_info.ycmux_mode);
318 vpif_dbg(1, debug, "can't set vpif channel mode\n");
323 /* Call vpif_set_params function to set the parameters and addresses */
324 ret = vpif_set_video_params(vpif, ch->channel_id);
327 vpif_dbg(1, debug, "can't set video params\n");
331 common->started = ret;
332 vpif_config_addr(ch, ret);
334 common->set_addr(addr + common->ytop_off,
335 addr + common->ybtm_off,
336 addr + common->ctop_off,
337 addr + common->cbtm_off);
340 * Set interrupt for both the fields in VPIF Register enable channel in
343 channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
344 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)) {
345 channel0_intr_assert();
346 channel0_intr_enable(1);
349 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
350 (common->started == 2)) {
351 channel1_intr_assert();
352 channel1_intr_enable(1);
359 /* abort streaming and wait for last buffer */
360 static int vpif_stop_streaming(struct vb2_queue *vq)
362 struct vpif_fh *fh = vb2_get_drv_priv(vq);
363 struct channel_obj *ch = fh->channel;
364 struct common_obj *common;
366 if (!vb2_is_streaming(vq))
369 common = &ch->common[VPIF_VIDEO_INDEX];
371 /* release all active buffers */
372 while (!list_empty(&common->dma_queue)) {
373 common->next_frm = list_entry(common->dma_queue.next,
374 struct vpif_cap_buffer, list);
375 list_del(&common->next_frm->list);
376 vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
382 static struct vb2_ops video_qops = {
383 .queue_setup = vpif_buffer_queue_setup,
384 .wait_prepare = vpif_wait_prepare,
385 .wait_finish = vpif_wait_finish,
386 .buf_init = vpif_buffer_init,
387 .buf_prepare = vpif_buffer_prepare,
388 .start_streaming = vpif_start_streaming,
389 .stop_streaming = vpif_stop_streaming,
390 .buf_cleanup = vpif_buf_cleanup,
391 .buf_queue = vpif_buffer_queue,
395 * vpif_process_buffer_complete: process a completed buffer
396 * @common: ptr to common channel object
398 * This function time stamp the buffer and mark it as DONE. It also
399 * wake up any process waiting on the QUEUE and set the next buffer
402 static void vpif_process_buffer_complete(struct common_obj *common)
404 do_gettimeofday(&common->cur_frm->vb.v4l2_buf.timestamp);
405 vb2_buffer_done(&common->cur_frm->vb,
407 /* Make curFrm pointing to nextFrm */
408 common->cur_frm = common->next_frm;
412 * vpif_schedule_next_buffer: set next buffer address for capture
413 * @common : ptr to common channel object
415 * This function will get next buffer from the dma queue and
416 * set the buffer address in the vpif register for capture.
417 * the buffer is marked active
419 static void vpif_schedule_next_buffer(struct common_obj *common)
421 unsigned long addr = 0;
423 common->next_frm = list_entry(common->dma_queue.next,
424 struct vpif_cap_buffer, list);
425 /* Remove that buffer from the buffer queue */
426 list_del(&common->next_frm->list);
427 common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
428 addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
430 /* Set top and bottom field addresses in VPIF registers */
431 common->set_addr(addr + common->ytop_off,
432 addr + common->ybtm_off,
433 addr + common->ctop_off,
434 addr + common->cbtm_off);
438 * vpif_channel_isr : ISR handler for vpif capture
440 * @dev_id: dev_id ptr
442 * It changes status of the captured buffer, takes next buffer from the queue
443 * and sets its address in VPIF registers
445 static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
447 struct vpif_device *dev = &vpif_obj;
448 struct common_obj *common;
449 struct channel_obj *ch;
450 enum v4l2_field field;
454 channel_id = *(int *)(dev_id);
455 if (!vpif_intr_status(channel_id))
458 ch = dev->dev[channel_id];
460 field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
462 for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
463 common = &ch->common[i];
464 /* skip If streaming is not started in this channel */
465 if (0 == common->started)
468 /* Check the field format */
469 if (1 == ch->vpifparams.std_info.frm_fmt) {
470 /* Progressive mode */
471 if (list_empty(&common->dma_queue))
474 if (!channel_first_int[i][channel_id])
475 vpif_process_buffer_complete(common);
477 channel_first_int[i][channel_id] = 0;
479 vpif_schedule_next_buffer(common);
482 channel_first_int[i][channel_id] = 0;
485 * Interlaced mode. If it is first interrupt, ignore
488 if (channel_first_int[i][channel_id]) {
489 channel_first_int[i][channel_id] = 0;
494 /* Get field id from VPIF registers */
495 fid = vpif_channel_getfid(ch->channel_id);
496 if (fid != ch->field_id) {
498 * If field id does not match stored
499 * field id, make them in sync
506 /* device field id and local field id are in sync */
508 /* this is even field */
509 if (common->cur_frm == common->next_frm)
512 /* mark the current buffer as done */
513 vpif_process_buffer_complete(common);
514 } else if (1 == fid) {
516 if (list_empty(&common->dma_queue) ||
517 (common->cur_frm != common->next_frm))
520 vpif_schedule_next_buffer(common);
528 * vpif_update_std_info() - update standard related info
529 * @ch: ptr to channel object
531 * For a given standard selected by application, update values
532 * in the device data structures
534 static int vpif_update_std_info(struct channel_obj *ch)
536 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
537 struct vpif_params *vpifparams = &ch->vpifparams;
538 const struct vpif_channel_config_params *config;
539 struct vpif_channel_config_params *std_info = &vpifparams->std_info;
540 struct video_obj *vid_ch = &ch->video;
543 vpif_dbg(2, debug, "vpif_update_std_info\n");
545 for (index = 0; index < vpif_ch_params_count; index++) {
546 config = &ch_params[index];
547 if (config->hd_sd == 0) {
548 vpif_dbg(2, debug, "SD format\n");
549 if (config->stdid & vid_ch->stdid) {
550 memcpy(std_info, config, sizeof(*config));
554 vpif_dbg(2, debug, "HD format\n");
555 if (!memcmp(&config->dv_timings, &vid_ch->dv_timings,
556 sizeof(vid_ch->dv_timings))) {
557 memcpy(std_info, config, sizeof(*config));
563 /* standard not found */
564 if (index == vpif_ch_params_count)
567 common->fmt.fmt.pix.width = std_info->width;
568 common->width = std_info->width;
569 common->fmt.fmt.pix.height = std_info->height;
570 common->height = std_info->height;
571 common->fmt.fmt.pix.bytesperline = std_info->width;
572 vpifparams->video_params.hpitch = std_info->width;
573 vpifparams->video_params.storage_mode = std_info->frm_fmt;
579 * vpif_calculate_offsets : This function calculates buffers offsets
580 * @ch : ptr to channel object
582 * This function calculates buffer offsets for Y and C in the top and
585 static void vpif_calculate_offsets(struct channel_obj *ch)
587 unsigned int hpitch, vpitch, sizeimage;
588 struct video_obj *vid_ch = &(ch->video);
589 struct vpif_params *vpifparams = &ch->vpifparams;
590 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
591 enum v4l2_field field = common->fmt.fmt.pix.field;
593 vpif_dbg(2, debug, "vpif_calculate_offsets\n");
595 if (V4L2_FIELD_ANY == field) {
596 if (vpifparams->std_info.frm_fmt)
597 vid_ch->buf_field = V4L2_FIELD_NONE;
599 vid_ch->buf_field = V4L2_FIELD_INTERLACED;
601 vid_ch->buf_field = common->fmt.fmt.pix.field;
603 sizeimage = common->fmt.fmt.pix.sizeimage;
605 hpitch = common->fmt.fmt.pix.bytesperline;
606 vpitch = sizeimage / (hpitch * 2);
608 if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
609 (V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
610 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
611 common->ytop_off = 0;
612 common->ybtm_off = hpitch;
613 common->ctop_off = sizeimage / 2;
614 common->cbtm_off = sizeimage / 2 + hpitch;
615 } else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
616 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
617 common->ytop_off = 0;
618 common->ybtm_off = sizeimage / 4;
619 common->ctop_off = sizeimage / 2;
620 common->cbtm_off = common->ctop_off + sizeimage / 4;
621 } else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
622 /* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
623 common->ybtm_off = 0;
624 common->ytop_off = sizeimage / 4;
625 common->cbtm_off = sizeimage / 2;
626 common->ctop_off = common->cbtm_off + sizeimage / 4;
628 if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
629 (V4L2_FIELD_INTERLACED == vid_ch->buf_field))
630 vpifparams->video_params.storage_mode = 1;
632 vpifparams->video_params.storage_mode = 0;
634 if (1 == vpifparams->std_info.frm_fmt)
635 vpifparams->video_params.hpitch =
636 common->fmt.fmt.pix.bytesperline;
638 if ((field == V4L2_FIELD_ANY)
639 || (field == V4L2_FIELD_INTERLACED))
640 vpifparams->video_params.hpitch =
641 common->fmt.fmt.pix.bytesperline * 2;
643 vpifparams->video_params.hpitch =
644 common->fmt.fmt.pix.bytesperline;
647 ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
651 * vpif_config_format: configure default frame format in the device
652 * ch : ptr to channel object
654 static void vpif_config_format(struct channel_obj *ch)
656 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
658 vpif_dbg(2, debug, "vpif_config_format\n");
660 common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
661 if (config_params.numbuffers[ch->channel_id] == 0)
662 common->memory = V4L2_MEMORY_USERPTR;
664 common->memory = V4L2_MEMORY_MMAP;
666 common->fmt.fmt.pix.sizeimage
667 = config_params.channel_bufsize[ch->channel_id];
669 if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
670 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
672 common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
673 common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
677 * vpif_get_default_field() - Get default field type based on interface
678 * @vpif_params - ptr to vpif params
680 static inline enum v4l2_field vpif_get_default_field(
681 struct vpif_interface *iface)
683 return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
684 V4L2_FIELD_INTERLACED;
688 * vpif_check_format() - check given pixel format for compatibility
690 * @pixfmt - Given pixel format
691 * @update - update the values as per hardware requirement
693 * Check the application pixel format for S_FMT and update the input
694 * values as per hardware limits for TRY_FMT. The default pixel and
695 * field format is selected based on interface type.
697 static int vpif_check_format(struct channel_obj *ch,
698 struct v4l2_pix_format *pixfmt,
701 struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
702 struct vpif_params *vpif_params = &ch->vpifparams;
703 enum v4l2_field field = pixfmt->field;
704 u32 sizeimage, hpitch, vpitch;
707 vpif_dbg(2, debug, "vpif_check_format\n");
709 * first check for the pixel format. If if_type is Raw bayer,
710 * only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only
711 * V4L2_PIX_FMT_YUV422P is supported
713 if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
714 if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) {
716 vpif_dbg(2, debug, "invalid pix format\n");
719 pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
722 if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) {
724 vpif_dbg(2, debug, "invalid pixel format\n");
727 pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
731 if (!(VPIF_VALID_FIELD(field))) {
733 vpif_dbg(2, debug, "invalid field format\n");
737 * By default use FIELD_NONE for RAW Bayer capture
738 * and FIELD_INTERLACED for other interfaces
740 field = vpif_get_default_field(&vpif_params->iface);
741 } else if (field == V4L2_FIELD_ANY)
742 /* unsupported field. Use default */
743 field = vpif_get_default_field(&vpif_params->iface);
745 /* validate the hpitch */
746 hpitch = pixfmt->bytesperline;
747 if (hpitch < vpif_params->std_info.width) {
749 vpif_dbg(2, debug, "invalid hpitch\n");
752 hpitch = vpif_params->std_info.width;
755 sizeimage = pixfmt->sizeimage;
757 vpitch = sizeimage / (hpitch * 2);
759 /* validate the vpitch */
760 if (vpitch < vpif_params->std_info.height) {
762 vpif_dbg(2, debug, "Invalid vpitch\n");
765 vpitch = vpif_params->std_info.height;
768 /* Check for 8 byte alignment */
769 if (!ALIGN(hpitch, 8)) {
771 vpif_dbg(2, debug, "invalid pitch alignment\n");
774 /* adjust to next 8 byte boundary */
775 hpitch = (((hpitch + 7) / 8) * 8);
777 /* if update is set, modify the bytesperline and sizeimage */
779 pixfmt->bytesperline = hpitch;
780 pixfmt->sizeimage = hpitch * vpitch * 2;
783 * Image width and height is always based on current standard width and
786 pixfmt->width = common->fmt.fmt.pix.width;
787 pixfmt->height = common->fmt.fmt.pix.height;
794 * vpif_config_addr() - function to configure buffer address in vpif
796 * @muxmode - channel mux mode
798 static void vpif_config_addr(struct channel_obj *ch, int muxmode)
800 struct common_obj *common;
802 vpif_dbg(2, debug, "vpif_config_addr\n");
804 common = &(ch->common[VPIF_VIDEO_INDEX]);
806 if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
807 common->set_addr = ch1_set_videobuf_addr;
808 else if (2 == muxmode)
809 common->set_addr = ch0_set_videobuf_addr_yc_nmux;
811 common->set_addr = ch0_set_videobuf_addr;
815 * vpif_mmap : It is used to map kernel space buffers into user spaces
816 * @filep: file pointer
817 * @vma: ptr to vm_area_struct
819 static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
821 /* Get the channel object and file handle object */
822 struct vpif_fh *fh = filep->private_data;
823 struct channel_obj *ch = fh->channel;
824 struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
827 vpif_dbg(2, debug, "vpif_mmap\n");
829 if (mutex_lock_interruptible(&common->lock))
831 ret = vb2_mmap(&common->buffer_queue, vma);
832 mutex_unlock(&common->lock);
837 * vpif_poll: It is used for select/poll system call
838 * @filep: file pointer
839 * @wait: poll table to wait
841 static unsigned int vpif_poll(struct file *filep, poll_table * wait)
843 struct vpif_fh *fh = filep->private_data;
844 struct channel_obj *channel = fh->channel;
845 struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]);
846 unsigned int res = 0;
848 vpif_dbg(2, debug, "vpif_poll\n");
850 if (common->started) {
851 mutex_lock(&common->lock);
852 res = vb2_poll(&common->buffer_queue, filep, wait);
853 mutex_unlock(&common->lock);
859 * vpif_open : vpif open handler
862 * It creates object of file handle structure and stores it in private_data
863 * member of filepointer
865 static int vpif_open(struct file *filep)
867 struct video_device *vdev = video_devdata(filep);
868 struct common_obj *common;
869 struct video_obj *vid_ch;
870 struct channel_obj *ch;
873 vpif_dbg(2, debug, "vpif_open\n");
875 ch = video_get_drvdata(vdev);
878 common = &ch->common[VPIF_VIDEO_INDEX];
880 /* Allocate memory for the file handle object */
881 fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
883 vpif_err("unable to allocate memory for file handle object\n");
887 if (mutex_lock_interruptible(&common->lock)) {
891 /* store pointer to fh in private_data member of filep */
892 filep->private_data = fh;
895 /* If decoder is not initialized. initialize it */
896 if (!ch->initialized) {
899 memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
901 /* Increment channel usrs counter */
903 /* Set io_allowed member to false */
904 fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
905 /* Initialize priority of this instance to default priority */
906 fh->prio = V4L2_PRIORITY_UNSET;
907 v4l2_prio_open(&ch->prio, &fh->prio);
908 mutex_unlock(&common->lock);
913 * vpif_release : function to clean up file close
914 * @filep: file pointer
916 * This function deletes buffer queue, frees the buffers and the vpif file
919 static int vpif_release(struct file *filep)
921 struct vpif_fh *fh = filep->private_data;
922 struct channel_obj *ch = fh->channel;
923 struct common_obj *common;
925 vpif_dbg(2, debug, "vpif_release\n");
927 common = &ch->common[VPIF_VIDEO_INDEX];
929 mutex_lock(&common->lock);
930 /* if this instance is doing IO */
931 if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
932 /* Reset io_usrs member of channel object */
934 /* Disable channel as per its device type and channel id */
935 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
937 channel0_intr_enable(0);
939 if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
940 (2 == common->started)) {
942 channel1_intr_enable(0);
945 /* Free buffers allocated */
946 vb2_queue_release(&common->buffer_queue);
947 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
950 /* Decrement channel usrs counter */
953 /* Close the priority */
954 v4l2_prio_close(&ch->prio, fh->prio);
959 mutex_unlock(&common->lock);
960 filep->private_data = NULL;
966 * vpif_reqbufs() - request buffer handler
969 * @reqbuf: request buffer structure ptr
971 static int vpif_reqbufs(struct file *file, void *priv,
972 struct v4l2_requestbuffers *reqbuf)
974 struct vpif_fh *fh = priv;
975 struct channel_obj *ch = fh->channel;
976 struct common_obj *common;
981 vpif_dbg(2, debug, "vpif_reqbufs\n");
984 * This file handle has not initialized the channel,
985 * It is not allowed to do settings
987 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id)
988 || (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
989 if (!fh->initialized) {
990 vpif_dbg(1, debug, "Channel Busy\n");
995 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type || !vpif_dev)
998 index = VPIF_VIDEO_INDEX;
1000 common = &ch->common[index];
1002 if (0 != common->io_usrs)
1005 /* Initialize videobuf2 queue as per the buffer type */
1006 common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
1007 if (!common->alloc_ctx) {
1008 vpif_err("Failed to get the context\n");
1011 q = &common->buffer_queue;
1012 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1013 q->io_modes = VB2_MMAP | VB2_USERPTR;
1015 q->ops = &video_qops;
1016 q->mem_ops = &vb2_dma_contig_memops;
1017 q->buf_struct_size = sizeof(struct vpif_cap_buffer);
1019 ret = vb2_queue_init(q);
1021 vpif_err("vpif_capture: vb2_queue_init() failed\n");
1022 vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
1025 /* Set io allowed member of file handle to TRUE */
1026 fh->io_allowed[index] = 1;
1027 /* Increment io usrs member of channel object to 1 */
1028 common->io_usrs = 1;
1029 /* Store type of memory requested in channel object */
1030 common->memory = reqbuf->memory;
1031 INIT_LIST_HEAD(&common->dma_queue);
1033 /* Allocate buffers */
1034 return vb2_reqbufs(&common->buffer_queue, reqbuf);
1038 * vpif_querybuf() - query buffer handler
1040 * @priv: file handle
1041 * @buf: v4l2 buffer structure ptr
1043 static int vpif_querybuf(struct file *file, void *priv,
1044 struct v4l2_buffer *buf)
1046 struct vpif_fh *fh = priv;
1047 struct channel_obj *ch = fh->channel;
1048 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1050 vpif_dbg(2, debug, "vpif_querybuf\n");
1052 if (common->fmt.type != buf->type)
1055 if (common->memory != V4L2_MEMORY_MMAP) {
1056 vpif_dbg(1, debug, "Invalid memory\n");
1060 return vb2_querybuf(&common->buffer_queue, buf);
1064 * vpif_qbuf() - query buffer handler
1066 * @priv: file handle
1067 * @buf: v4l2 buffer structure ptr
1069 static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1072 struct vpif_fh *fh = priv;
1073 struct channel_obj *ch = fh->channel;
1074 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1075 struct v4l2_buffer tbuf = *buf;
1077 vpif_dbg(2, debug, "vpif_qbuf\n");
1079 if (common->fmt.type != tbuf.type) {
1080 vpif_err("invalid buffer type\n");
1084 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1085 vpif_err("fh io not allowed\n");
1089 return vb2_qbuf(&common->buffer_queue, buf);
1093 * vpif_dqbuf() - query buffer handler
1095 * @priv: file handle
1096 * @buf: v4l2 buffer structure ptr
1098 static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
1100 struct vpif_fh *fh = priv;
1101 struct channel_obj *ch = fh->channel;
1102 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1104 vpif_dbg(2, debug, "vpif_dqbuf\n");
1106 return vb2_dqbuf(&common->buffer_queue, buf,
1107 (file->f_flags & O_NONBLOCK));
1111 * vpif_streamon() - streamon handler
1113 * @priv: file handle
1114 * @buftype: v4l2 buffer type
1116 static int vpif_streamon(struct file *file, void *priv,
1117 enum v4l2_buf_type buftype)
1120 struct vpif_fh *fh = priv;
1121 struct channel_obj *ch = fh->channel;
1122 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1123 struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
1124 struct vpif_params *vpif;
1127 vpif_dbg(2, debug, "vpif_streamon\n");
1129 vpif = &ch->vpifparams;
1131 if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1132 vpif_dbg(1, debug, "buffer type not supported\n");
1136 /* If file handle is not allowed IO, return error */
1137 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1138 vpif_dbg(1, debug, "io not allowed\n");
1142 /* If Streaming is already started, return error */
1143 if (common->started) {
1144 vpif_dbg(1, debug, "channel->started\n");
1148 if ((ch->channel_id == VPIF_CHANNEL0_VIDEO &&
1149 oth_ch->common[VPIF_VIDEO_INDEX].started &&
1150 vpif->std_info.ycmux_mode == 0) ||
1151 ((ch->channel_id == VPIF_CHANNEL1_VIDEO) &&
1152 (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
1153 vpif_dbg(1, debug, "other channel is being used\n");
1157 ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0);
1161 /* Enable streamon on the sub device */
1162 ret = v4l2_subdev_call(ch->sd, video, s_stream, 1);
1164 if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
1165 vpif_dbg(1, debug, "stream on failed in subdev\n");
1169 /* Call vb2_streamon to start streaming in videobuf2 */
1170 ret = vb2_streamon(&common->buffer_queue, buftype);
1172 vpif_dbg(1, debug, "vb2_streamon\n");
1180 * vpif_streamoff() - streamoff handler
1182 * @priv: file handle
1183 * @buftype: v4l2 buffer type
1185 static int vpif_streamoff(struct file *file, void *priv,
1186 enum v4l2_buf_type buftype)
1189 struct vpif_fh *fh = priv;
1190 struct channel_obj *ch = fh->channel;
1191 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1194 vpif_dbg(2, debug, "vpif_streamoff\n");
1196 if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1197 vpif_dbg(1, debug, "buffer type not supported\n");
1201 /* If io is allowed for this file handle, return error */
1202 if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
1203 vpif_dbg(1, debug, "io not allowed\n");
1207 /* If streaming is not started, return error */
1208 if (!common->started) {
1209 vpif_dbg(1, debug, "channel->started\n");
1213 /* disable channel */
1214 if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
1216 channel0_intr_enable(0);
1219 channel1_intr_enable(0);
1222 common->started = 0;
1224 ret = v4l2_subdev_call(ch->sd, video, s_stream, 0);
1226 if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
1227 vpif_dbg(1, debug, "stream off failed in subdev\n");
1229 return vb2_streamoff(&common->buffer_queue, buftype);
1233 * vpif_input_to_subdev() - Maps input to sub device
1234 * @vpif_cfg - global config ptr
1235 * @chan_cfg - channel config ptr
1236 * @input_index - Given input index from application
1238 * lookup the sub device information for a given input index.
1239 * we report all the inputs to application. inputs table also
1240 * has sub device name for the each input
1242 static int vpif_input_to_subdev(
1243 struct vpif_capture_config *vpif_cfg,
1244 struct vpif_capture_chan_config *chan_cfg,
1247 struct vpif_subdev_info *subdev_info;
1248 const char *subdev_name;
1251 vpif_dbg(2, debug, "vpif_input_to_subdev\n");
1253 subdev_name = chan_cfg->inputs[input_index].subdev_name;
1254 if (subdev_name == NULL)
1257 /* loop through the sub device list to get the sub device info */
1258 for (i = 0; i < vpif_cfg->subdev_count; i++) {
1259 subdev_info = &vpif_cfg->subdev_info[i];
1260 if (!strcmp(subdev_info->name, subdev_name))
1267 * vpif_set_input() - Select an input
1268 * @vpif_cfg - global config ptr
1270 * @_index - Given input index from application
1272 * Select the given input.
1274 static int vpif_set_input(
1275 struct vpif_capture_config *vpif_cfg,
1276 struct channel_obj *ch,
1279 struct vpif_capture_chan_config *chan_cfg =
1280 &vpif_cfg->chan_config[ch->channel_id];
1281 struct vpif_subdev_info *subdev_info = NULL;
1282 struct v4l2_subdev *sd = NULL;
1283 u32 input = 0, output = 0;
1287 sd_index = vpif_input_to_subdev(vpif_cfg, chan_cfg, index);
1288 if (sd_index >= 0) {
1289 sd = vpif_obj.sd[sd_index];
1290 subdev_info = &vpif_cfg->subdev_info[sd_index];
1293 /* first setup input path from sub device to vpif */
1294 if (sd && vpif_cfg->setup_input_path) {
1295 ret = vpif_cfg->setup_input_path(ch->channel_id,
1298 vpif_dbg(1, debug, "couldn't setup input path for the" \
1299 " sub device %s, for input index %d\n",
1300 subdev_info->name, index);
1306 input = chan_cfg->inputs[index].input_route;
1307 output = chan_cfg->inputs[index].output_route;
1308 ret = v4l2_subdev_call(sd, video, s_routing,
1310 if (ret < 0 && ret != -ENOIOCTLCMD) {
1311 vpif_dbg(1, debug, "Failed to set input\n");
1315 ch->input_idx = index;
1317 /* copy interface parameters to vpif */
1318 ch->vpifparams.iface = chan_cfg->vpif_if;
1320 /* update tvnorms from the sub device input info */
1321 ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
1326 * vpif_querystd() - querystd handler
1328 * @priv: file handle
1329 * @std_id: ptr to std id
1331 * This function is called to detect standard at the selected input
1333 static int vpif_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1335 struct vpif_fh *fh = priv;
1336 struct channel_obj *ch = fh->channel;
1339 vpif_dbg(2, debug, "vpif_querystd\n");
1341 /* Call querystd function of decoder device */
1342 ret = v4l2_subdev_call(ch->sd, video, querystd, std_id);
1344 if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1347 vpif_dbg(1, debug, "Failed to query standard for sub devices\n");
1355 * vpif_g_std() - get STD handler
1357 * @priv: file handle
1358 * @std_id: ptr to std id
1360 static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
1362 struct vpif_fh *fh = priv;
1363 struct channel_obj *ch = fh->channel;
1365 vpif_dbg(2, debug, "vpif_g_std\n");
1367 *std = ch->video.stdid;
1372 * vpif_s_std() - set STD handler
1374 * @priv: file handle
1375 * @std_id: ptr to std id
1377 static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
1379 struct vpif_fh *fh = priv;
1380 struct channel_obj *ch = fh->channel;
1381 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1384 vpif_dbg(2, debug, "vpif_s_std\n");
1386 if (common->started) {
1387 vpif_err("streaming in progress\n");
1391 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1392 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1393 if (!fh->initialized) {
1394 vpif_dbg(1, debug, "Channel Busy\n");
1399 ret = v4l2_prio_check(&ch->prio, fh->prio);
1403 fh->initialized = 1;
1405 /* Call encoder subdevice function to set the standard */
1406 ch->video.stdid = *std_id;
1407 memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_timings));
1409 /* Get the information about the standard */
1410 if (vpif_update_std_info(ch)) {
1411 vpif_err("Error getting the standard info\n");
1415 /* Configure the default format information */
1416 vpif_config_format(ch);
1418 /* set standard in the sub device */
1419 ret = v4l2_subdev_call(ch->sd, core, s_std, *std_id);
1420 if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV) {
1421 vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
1428 * vpif_enum_input() - ENUMINPUT handler
1430 * @priv: file handle
1431 * @input: ptr to input structure
1433 static int vpif_enum_input(struct file *file, void *priv,
1434 struct v4l2_input *input)
1437 struct vpif_capture_config *config = vpif_dev->platform_data;
1438 struct vpif_capture_chan_config *chan_cfg;
1439 struct vpif_fh *fh = priv;
1440 struct channel_obj *ch = fh->channel;
1442 chan_cfg = &config->chan_config[ch->channel_id];
1444 if (input->index >= chan_cfg->input_count) {
1445 vpif_dbg(1, debug, "Invalid input index\n");
1449 memcpy(input, &chan_cfg->inputs[input->index].input,
1455 * vpif_g_input() - Get INPUT handler
1457 * @priv: file handle
1458 * @index: ptr to input index
1460 static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
1462 struct vpif_fh *fh = priv;
1463 struct channel_obj *ch = fh->channel;
1465 *index = ch->input_idx;
1470 * vpif_s_input() - Set INPUT handler
1472 * @priv: file handle
1473 * @index: input index
1475 static int vpif_s_input(struct file *file, void *priv, unsigned int index)
1477 struct vpif_capture_config *config = vpif_dev->platform_data;
1478 struct vpif_capture_chan_config *chan_cfg;
1479 struct vpif_fh *fh = priv;
1480 struct channel_obj *ch = fh->channel;
1481 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1484 chan_cfg = &config->chan_config[ch->channel_id];
1486 if (index >= chan_cfg->input_count)
1489 if (common->started) {
1490 vpif_err("Streaming in progress\n");
1494 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1495 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1496 if (!fh->initialized) {
1497 vpif_dbg(1, debug, "Channel Busy\n");
1502 ret = v4l2_prio_check(&ch->prio, fh->prio);
1506 fh->initialized = 1;
1507 return vpif_set_input(config, ch, index);
1511 * vpif_enum_fmt_vid_cap() - ENUM_FMT handler
1513 * @priv: file handle
1514 * @index: input index
1516 static int vpif_enum_fmt_vid_cap(struct file *file, void *priv,
1517 struct v4l2_fmtdesc *fmt)
1519 struct vpif_fh *fh = priv;
1520 struct channel_obj *ch = fh->channel;
1522 if (fmt->index != 0) {
1523 vpif_dbg(1, debug, "Invalid format index\n");
1527 /* Fill in the information about format */
1528 if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
1529 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1530 strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
1531 fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
1533 fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1534 strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
1535 fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
1541 * vpif_try_fmt_vid_cap() - TRY_FMT handler
1543 * @priv: file handle
1544 * @fmt: ptr to v4l2 format structure
1546 static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
1547 struct v4l2_format *fmt)
1549 struct vpif_fh *fh = priv;
1550 struct channel_obj *ch = fh->channel;
1551 struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
1553 return vpif_check_format(ch, pixfmt, 1);
1558 * vpif_g_fmt_vid_cap() - Set INPUT handler
1560 * @priv: file handle
1561 * @fmt: ptr to v4l2 format structure
1563 static int vpif_g_fmt_vid_cap(struct file *file, void *priv,
1564 struct v4l2_format *fmt)
1566 struct vpif_fh *fh = priv;
1567 struct channel_obj *ch = fh->channel;
1568 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1570 /* Check the validity of the buffer type */
1571 if (common->fmt.type != fmt->type)
1574 /* Fill in the information about format */
1580 * vpif_s_fmt_vid_cap() - Set FMT handler
1582 * @priv: file handle
1583 * @fmt: ptr to v4l2 format structure
1585 static int vpif_s_fmt_vid_cap(struct file *file, void *priv,
1586 struct v4l2_format *fmt)
1588 struct vpif_fh *fh = priv;
1589 struct channel_obj *ch = fh->channel;
1590 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1591 struct v4l2_pix_format *pixfmt;
1594 vpif_dbg(2, debug, "%s\n", __func__);
1596 /* If streaming is started, return error */
1597 if (common->started) {
1598 vpif_dbg(1, debug, "Streaming is started\n");
1602 if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
1603 (VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
1604 if (!fh->initialized) {
1605 vpif_dbg(1, debug, "Channel Busy\n");
1610 ret = v4l2_prio_check(&ch->prio, fh->prio);
1614 fh->initialized = 1;
1616 pixfmt = &fmt->fmt.pix;
1617 /* Check for valid field format */
1618 ret = vpif_check_format(ch, pixfmt, 0);
1622 /* store the format in the channel object */
1628 * vpif_querycap() - QUERYCAP handler
1630 * @priv: file handle
1631 * @cap: ptr to v4l2_capability structure
1633 static int vpif_querycap(struct file *file, void *priv,
1634 struct v4l2_capability *cap)
1636 struct vpif_capture_config *config = vpif_dev->platform_data;
1638 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1639 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1640 snprintf(cap->driver, sizeof(cap->driver), "%s", dev_name(vpif_dev));
1641 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
1642 dev_name(vpif_dev));
1643 strlcpy(cap->card, config->card_name, sizeof(cap->card));
1649 * vpif_g_priority() - get priority handler
1651 * @priv: file handle
1652 * @prio: ptr to v4l2_priority structure
1654 static int vpif_g_priority(struct file *file, void *priv,
1655 enum v4l2_priority *prio)
1657 struct vpif_fh *fh = priv;
1658 struct channel_obj *ch = fh->channel;
1660 *prio = v4l2_prio_max(&ch->prio);
1666 * vpif_s_priority() - set priority handler
1668 * @priv: file handle
1669 * @prio: ptr to v4l2_priority structure
1671 static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
1673 struct vpif_fh *fh = priv;
1674 struct channel_obj *ch = fh->channel;
1676 return v4l2_prio_change(&ch->prio, &fh->prio, p);
1680 * vpif_cropcap() - cropcap handler
1682 * @priv: file handle
1683 * @crop: ptr to v4l2_cropcap structure
1685 static int vpif_cropcap(struct file *file, void *priv,
1686 struct v4l2_cropcap *crop)
1688 struct vpif_fh *fh = priv;
1689 struct channel_obj *ch = fh->channel;
1690 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
1692 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type)
1695 crop->bounds.left = 0;
1696 crop->bounds.top = 0;
1697 crop->bounds.height = common->height;
1698 crop->bounds.width = common->width;
1699 crop->defrect = crop->bounds;
1704 * vpif_enum_dv_timings() - ENUM_DV_TIMINGS handler
1706 * @priv: file handle
1707 * @timings: input timings
1710 vpif_enum_dv_timings(struct file *file, void *priv,
1711 struct v4l2_enum_dv_timings *timings)
1713 struct vpif_fh *fh = priv;
1714 struct channel_obj *ch = fh->channel;
1717 ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
1718 if (ret == -ENOIOCTLCMD && ret == -ENODEV)
1724 * vpif_query_dv_timings() - QUERY_DV_TIMINGS handler
1726 * @priv: file handle
1727 * @timings: input timings
1730 vpif_query_dv_timings(struct file *file, void *priv,
1731 struct v4l2_dv_timings *timings)
1733 struct vpif_fh *fh = priv;
1734 struct channel_obj *ch = fh->channel;
1737 ret = v4l2_subdev_call(ch->sd, video, query_dv_timings, timings);
1738 if (ret == -ENOIOCTLCMD && ret == -ENODEV)
1744 * vpif_s_dv_timings() - S_DV_TIMINGS handler
1746 * @priv: file handle
1747 * @timings: digital video timings
1749 static int vpif_s_dv_timings(struct file *file, void *priv,
1750 struct v4l2_dv_timings *timings)
1752 struct vpif_fh *fh = priv;
1753 struct channel_obj *ch = fh->channel;
1754 struct vpif_params *vpifparams = &ch->vpifparams;
1755 struct vpif_channel_config_params *std_info = &vpifparams->std_info;
1756 struct video_obj *vid_ch = &ch->video;
1757 struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
1760 if (timings->type != V4L2_DV_BT_656_1120) {
1761 vpif_dbg(2, debug, "Timing type not defined\n");
1765 /* Configure subdevice timings, if any */
1766 ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
1767 if (ret == -ENOIOCTLCMD || ret == -ENODEV)
1770 vpif_dbg(2, debug, "Error setting custom DV timings\n");
1774 if (!(timings->bt.width && timings->bt.height &&
1775 (timings->bt.hbackporch ||
1776 timings->bt.hfrontporch ||
1777 timings->bt.hsync) &&
1778 timings->bt.vfrontporch &&
1779 (timings->bt.vbackporch ||
1780 timings->bt.vsync))) {
1781 vpif_dbg(2, debug, "Timings for width, height, "
1782 "horizontal back porch, horizontal sync, "
1783 "horizontal front porch, vertical back porch, "
1784 "vertical sync and vertical back porch "
1785 "must be defined\n");
1789 vid_ch->dv_timings = *timings;
1791 /* Configure video port timings */
1793 std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
1795 std_info->sav2eav = bt->width;
1798 std_info->l3 = bt->vsync + bt->vbackporch + 1;
1800 if (bt->interlaced) {
1801 if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
1802 std_info->vsize = bt->height * 2 +
1803 bt->vfrontporch + bt->vsync + bt->vbackporch +
1804 bt->il_vfrontporch + bt->il_vsync +
1806 std_info->l5 = std_info->vsize/2 -
1807 (bt->vfrontporch - 1);
1808 std_info->l7 = std_info->vsize/2 + 1;
1809 std_info->l9 = std_info->l7 + bt->il_vsync +
1810 bt->il_vbackporch + 1;
1811 std_info->l11 = std_info->vsize -
1812 (bt->il_vfrontporch - 1);
1814 vpif_dbg(2, debug, "Required timing values for "
1815 "interlaced BT format missing\n");
1819 std_info->vsize = bt->height + bt->vfrontporch +
1820 bt->vsync + bt->vbackporch;
1821 std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
1823 strncpy(std_info->name, "Custom timings BT656/1120", VPIF_MAX_NAME);
1824 std_info->width = bt->width;
1825 std_info->height = bt->height;
1826 std_info->frm_fmt = bt->interlaced ? 0 : 1;
1827 std_info->ycmux_mode = 0;
1828 std_info->capture_format = 0;
1829 std_info->vbi_supported = 0;
1830 std_info->hd_sd = 1;
1831 std_info->stdid = 0;
1838 * vpif_g_dv_timings() - G_DV_TIMINGS handler
1840 * @priv: file handle
1841 * @timings: digital video timings
1843 static int vpif_g_dv_timings(struct file *file, void *priv,
1844 struct v4l2_dv_timings *timings)
1846 struct vpif_fh *fh = priv;
1847 struct channel_obj *ch = fh->channel;
1848 struct video_obj *vid_ch = &ch->video;
1850 *timings = vid_ch->dv_timings;
1856 * vpif_g_chip_ident() - Identify the chip
1858 * @priv: file handle
1859 * @chip: chip identity
1861 * Returns zero or -EINVAL if read operations fails.
1863 static int vpif_g_chip_ident(struct file *file, void *priv,
1864 struct v4l2_dbg_chip_ident *chip)
1866 chip->ident = V4L2_IDENT_NONE;
1868 if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
1869 chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
1870 vpif_dbg(2, debug, "match_type is invalid.\n");
1874 return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
1875 g_chip_ident, chip);
1878 #ifdef CONFIG_VIDEO_ADV_DEBUG
1880 * vpif_dbg_g_register() - Read register
1882 * @priv: file handle
1883 * @reg: register to be read
1886 * Returns zero or -EINVAL if read operations fails.
1888 static int vpif_dbg_g_register(struct file *file, void *priv,
1889 struct v4l2_dbg_register *reg){
1890 struct vpif_fh *fh = priv;
1891 struct channel_obj *ch = fh->channel;
1893 return v4l2_subdev_call(ch->sd, core, g_register, reg);
1897 * vpif_dbg_s_register() - Write to register
1899 * @priv: file handle
1900 * @reg: register to be modified
1903 * Returns zero or -EINVAL if write operations fails.
1905 static int vpif_dbg_s_register(struct file *file, void *priv,
1906 struct v4l2_dbg_register *reg){
1907 struct vpif_fh *fh = priv;
1908 struct channel_obj *ch = fh->channel;
1910 return v4l2_subdev_call(ch->sd, core, s_register, reg);
1915 * vpif_log_status() - Status information
1917 * @priv: file handle
1921 static int vpif_log_status(struct file *filep, void *priv)
1923 /* status for sub devices */
1924 v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
1929 /* vpif capture ioctl operations */
1930 static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
1931 .vidioc_querycap = vpif_querycap,
1932 .vidioc_g_priority = vpif_g_priority,
1933 .vidioc_s_priority = vpif_s_priority,
1934 .vidioc_enum_fmt_vid_cap = vpif_enum_fmt_vid_cap,
1935 .vidioc_g_fmt_vid_cap = vpif_g_fmt_vid_cap,
1936 .vidioc_s_fmt_vid_cap = vpif_s_fmt_vid_cap,
1937 .vidioc_try_fmt_vid_cap = vpif_try_fmt_vid_cap,
1938 .vidioc_enum_input = vpif_enum_input,
1939 .vidioc_s_input = vpif_s_input,
1940 .vidioc_g_input = vpif_g_input,
1941 .vidioc_reqbufs = vpif_reqbufs,
1942 .vidioc_querybuf = vpif_querybuf,
1943 .vidioc_querystd = vpif_querystd,
1944 .vidioc_s_std = vpif_s_std,
1945 .vidioc_g_std = vpif_g_std,
1946 .vidioc_qbuf = vpif_qbuf,
1947 .vidioc_dqbuf = vpif_dqbuf,
1948 .vidioc_streamon = vpif_streamon,
1949 .vidioc_streamoff = vpif_streamoff,
1950 .vidioc_cropcap = vpif_cropcap,
1951 .vidioc_enum_dv_timings = vpif_enum_dv_timings,
1952 .vidioc_query_dv_timings = vpif_query_dv_timings,
1953 .vidioc_s_dv_timings = vpif_s_dv_timings,
1954 .vidioc_g_dv_timings = vpif_g_dv_timings,
1955 .vidioc_g_chip_ident = vpif_g_chip_ident,
1956 #ifdef CONFIG_VIDEO_ADV_DEBUG
1957 .vidioc_g_register = vpif_dbg_g_register,
1958 .vidioc_s_register = vpif_dbg_s_register,
1960 .vidioc_log_status = vpif_log_status,
1963 /* vpif file operations */
1964 static struct v4l2_file_operations vpif_fops = {
1965 .owner = THIS_MODULE,
1967 .release = vpif_release,
1968 .unlocked_ioctl = video_ioctl2,
1973 /* vpif video template */
1974 static struct video_device vpif_video_template = {
1978 .ioctl_ops = &vpif_ioctl_ops,
1982 * initialize_vpif() - Initialize vpif data structures
1984 * Allocate memory for data structures and initialize them
1986 static int initialize_vpif(void)
1989 int free_channel_objects_index;
1991 /* Default number of buffers should be 3 */
1992 if ((ch0_numbuffers > 0) &&
1993 (ch0_numbuffers < config_params.min_numbuffers))
1994 ch0_numbuffers = config_params.min_numbuffers;
1995 if ((ch1_numbuffers > 0) &&
1996 (ch1_numbuffers < config_params.min_numbuffers))
1997 ch1_numbuffers = config_params.min_numbuffers;
1999 /* Set buffer size to min buffers size if it is invalid */
2000 if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO])
2002 config_params.min_bufsize[VPIF_CHANNEL0_VIDEO];
2003 if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO])
2005 config_params.min_bufsize[VPIF_CHANNEL1_VIDEO];
2007 config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers;
2008 config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers;
2009 if (ch0_numbuffers) {
2010 config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO]
2013 if (ch1_numbuffers) {
2014 config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO]
2018 /* Allocate memory for six channel objects */
2019 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2021 kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
2022 /* If memory allocation fails, return error */
2023 if (!vpif_obj.dev[i]) {
2024 free_channel_objects_index = i;
2026 goto vpif_init_free_channel_objects;
2031 vpif_init_free_channel_objects:
2032 for (j = 0; j < free_channel_objects_index; j++)
2033 kfree(vpif_obj.dev[j]);
2038 * vpif_probe : This function probes the vpif capture driver
2039 * @pdev: platform device pointer
2041 * This creates device entries by register itself to the V4L2 driver and
2042 * initializes fields of each channel objects
2044 static __init int vpif_probe(struct platform_device *pdev)
2046 struct vpif_subdev_info *subdevdata;
2047 struct vpif_capture_config *config;
2050 struct i2c_adapter *i2c_adap;
2051 struct channel_obj *ch;
2052 struct common_obj *common;
2053 struct video_device *vfd;
2054 struct resource *res;
2058 vpif_dev = &pdev->dev;
2060 err = initialize_vpif();
2062 v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
2066 err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
2068 v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
2072 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
2073 for (i = res->start; i <= res->end; i++) {
2074 if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
2075 "VPIF_Capture", (void *)
2076 (&vpif_obj.dev[res_idx]->channel_id))) {
2078 for (j = 0; j < i; j++)
2079 free_irq(j, (void *)
2080 (&vpif_obj.dev[res_idx]->channel_id));
2087 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2088 /* Get the pointer to the channel object */
2089 ch = vpif_obj.dev[i];
2090 /* Allocate memory for video device */
2091 vfd = video_device_alloc();
2093 for (j = 0; j < i; j++) {
2094 ch = vpif_obj.dev[j];
2095 video_device_release(ch->video_dev);
2101 /* Initialize field of video device */
2102 *vfd = vpif_video_template;
2103 vfd->v4l2_dev = &vpif_obj.v4l2_dev;
2104 vfd->release = video_device_release;
2105 snprintf(vfd->name, sizeof(vfd->name),
2106 "VPIF_Capture_DRIVER_V%s",
2107 VPIF_CAPTURE_VERSION);
2108 /* Set video_dev to the video device */
2109 ch->video_dev = vfd;
2112 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2114 size = resource_size(res);
2115 /* The resources are divided into two equal memory and when we
2116 * have HD output we can add them together
2118 for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
2119 ch = vpif_obj.dev[j];
2121 /* only enabled if second resource exists */
2122 config_params.video_limit[ch->channel_id] = 0;
2124 config_params.video_limit[ch->channel_id] =
2129 i2c_adap = i2c_get_adapter(1);
2130 config = pdev->dev.platform_data;
2132 subdev_count = config->subdev_count;
2133 vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
2135 if (vpif_obj.sd == NULL) {
2136 vpif_err("unable to allocate memory for subdevice pointers\n");
2141 for (i = 0; i < subdev_count; i++) {
2142 subdevdata = &config->subdev_info[i];
2144 v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
2146 &subdevdata->board_info,
2149 if (!vpif_obj.sd[i]) {
2150 vpif_err("Error registering v4l2 subdevice\n");
2151 goto probe_subdev_out;
2153 v4l2_info(&vpif_obj.v4l2_dev, "registered sub device %s\n",
2157 for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
2158 ch = vpif_obj.dev[j];
2160 common = &(ch->common[VPIF_VIDEO_INDEX]);
2161 spin_lock_init(&common->irqlock);
2162 mutex_init(&common->lock);
2163 ch->video_dev->lock = &common->lock;
2164 /* Initialize prio member of channel object */
2165 v4l2_prio_init(&ch->prio);
2166 video_set_drvdata(ch->video_dev, ch);
2168 /* select input 0 */
2169 err = vpif_set_input(config, ch, 0);
2173 err = video_register_device(ch->video_dev,
2174 VFL_TYPE_GRABBER, (j ? 1 : 0));
2178 v4l2_info(&vpif_obj.v4l2_dev, "VPIF capture driver initialized\n");
2182 for (k = 0; k < j; k++) {
2183 /* Get the pointer to the channel object */
2184 ch = vpif_obj.dev[k];
2185 /* Unregister video device */
2186 video_unregister_device(ch->video_dev);
2189 /* free sub devices memory */
2193 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2194 ch = vpif_obj.dev[i];
2195 /* Note: does nothing if ch->video_dev == NULL */
2196 video_device_release(ch->video_dev);
2199 v4l2_device_unregister(&vpif_obj.v4l2_dev);
2200 for (i = 0; i < res_idx; i++) {
2201 res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
2202 for (j = res->start; j <= res->end; j++)
2203 free_irq(j, (void *)(&vpif_obj.dev[i]->channel_id));
2209 * vpif_remove() - driver remove handler
2210 * @device: ptr to platform device structure
2212 * The vidoe device is unregistered
2214 static int vpif_remove(struct platform_device *device)
2217 struct channel_obj *ch;
2219 v4l2_device_unregister(&vpif_obj.v4l2_dev);
2221 /* un-register device */
2222 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2223 /* Get the pointer to the channel object */
2224 ch = vpif_obj.dev[i];
2225 /* Unregister video device */
2226 video_unregister_device(ch->video_dev);
2233 * vpif_suspend: vpif device suspend
2235 static int vpif_suspend(struct device *dev)
2238 struct common_obj *common;
2239 struct channel_obj *ch;
2242 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2243 /* Get the pointer to the channel object */
2244 ch = vpif_obj.dev[i];
2245 common = &ch->common[VPIF_VIDEO_INDEX];
2246 mutex_lock(&common->lock);
2247 if (ch->usrs && common->io_usrs) {
2248 /* Disable channel */
2249 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
2251 channel0_intr_enable(0);
2253 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
2254 common->started == 2) {
2256 channel1_intr_enable(0);
2259 mutex_unlock(&common->lock);
2266 * vpif_resume: vpif device suspend
2268 static int vpif_resume(struct device *dev)
2270 struct common_obj *common;
2271 struct channel_obj *ch;
2274 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
2275 /* Get the pointer to the channel object */
2276 ch = vpif_obj.dev[i];
2277 common = &ch->common[VPIF_VIDEO_INDEX];
2278 mutex_lock(&common->lock);
2279 if (ch->usrs && common->io_usrs) {
2280 /* Disable channel */
2281 if (ch->channel_id == VPIF_CHANNEL0_VIDEO) {
2283 channel0_intr_enable(1);
2285 if (ch->channel_id == VPIF_CHANNEL1_VIDEO ||
2286 common->started == 2) {
2288 channel1_intr_enable(1);
2291 mutex_unlock(&common->lock);
2297 static const struct dev_pm_ops vpif_dev_pm_ops = {
2298 .suspend = vpif_suspend,
2299 .resume = vpif_resume,
2302 #define vpif_pm_ops (&vpif_dev_pm_ops)
2304 #define vpif_pm_ops NULL
2307 static __refdata struct platform_driver vpif_driver = {
2309 .name = "vpif_capture",
2310 .owner = THIS_MODULE,
2313 .probe = vpif_probe,
2314 .remove = vpif_remove,
2318 * vpif_init: initialize the vpif driver
2320 * This function registers device and driver to the kernel, requests irq
2321 * handler and allocates memory
2322 * for channel objects
2324 static __init int vpif_init(void)
2326 return platform_driver_register(&vpif_driver);
2330 * vpif_cleanup : This function clean up the vpif capture resources
2332 * This will un-registers device and driver to the kernel, frees
2333 * requested irq handler and de-allocates memory allocated for channel
2336 static void vpif_cleanup(void)
2338 struct platform_device *pdev;
2339 struct resource *res;
2343 pdev = container_of(vpif_dev, struct platform_device, dev);
2344 while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
2345 for (irq_num = res->start; irq_num <= res->end; irq_num++)
2347 (void *)(&vpif_obj.dev[i]->channel_id));
2351 platform_driver_unregister(&vpif_driver);
2354 for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++)
2355 kfree(vpif_obj.dev[i]);
2358 /* Function for module initialization and cleanup */
2359 module_init(vpif_init);
2360 module_exit(vpif_cleanup);