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+/*
+ * Copyright (C) 2011 Texas Instruments Inc
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Contributors:-
+ * Manjunath Hadli <manjunath.hadli@ti.com>
+ * Nagabhushana Netagunte <nagabhushana.netagunte@ti.com>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-mediabus.h>
+#include <media/media-entity.h>
+#include <media/media-device.h>
+#include "vpfe_capture.h"
+#include <mach/cputype.h>
+#include "ccdc_hw_device.h"
+
+/* number of buffers supported in single-shot mode */
+#define SS_NUM_BUFFERS 1
+/* minimum number of buffers needed in cont-mode */
+#define CONT_MIN_NUM_BUFFERS 3
+
+static int debug;
+
+/* get v4l2 subdev pointer to external subdev which is active */
+static struct v4l2_subdev *vpfe_get_input_sd(struct vpfe_video_device *video)
+{
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct media_pad *remote;
+
+ remote = media_entity_remote_source(&vpfe_dev->vpfe_ccdc.pads[0]);
+ if (remote == NULL) {
+ printk(KERN_ERR "invalid media connection to ccdc\n");
+ return NULL;
+ }
+
+ return media_entity_to_v4l2_subdev(remote->entity);
+}
+
+/* updates external subdev(sensor/decoder) which is active */
+static int vpfe_update_current_ext_subdev(struct vpfe_video_device *video)
+{
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_config *vpfe_cfg;
+ struct v4l2_subdev *subdev;
+ struct media_pad *remote;
+ int i;
+
+ remote = media_entity_remote_source(&vpfe_dev->vpfe_ccdc.pads[0]);
+ if (remote == NULL) {
+ printk(KERN_ERR "invalid media connection to ccdc\n");
+ return -1;
+ }
+
+ subdev = media_entity_to_v4l2_subdev(remote->entity);
+
+ vpfe_cfg = vpfe_dev->pdev->platform_data;
+
+ for (i = 0; i < vpfe_cfg->num_subdevs; i++) {
+ if (!strcmp(vpfe_cfg->sub_devs[i].module_name, subdev->name)) {
+ video->current_ext_subdev = &vpfe_cfg->sub_devs[i];
+ break;
+ }
+ }
+
+ /* if user not linked decoder/sensor to ccdc */
+ if (i == vpfe_cfg->num_subdevs) {
+ printk(KERN_ERR "invalid media chain connection to ccdc\n");
+ return -1;
+ }
+
+ /* find the v4l2 subdev pointer */
+ for (i = 0; i < vpfe_dev->num_ext_subdevs; i++) {
+ if (!strcmp(video->current_ext_subdev->module_name,
+ vpfe_dev->sd[i]->name))
+ video->current_ext_subdev->subdev = vpfe_dev->sd[i];
+ }
+
+ return 0;
+}
+
+/* get the subdev which is connected to the output video node */
+static struct v4l2_subdev *
+vpfe_video_remote_subdev(struct vpfe_video_device *video, u32 *pad)
+{
+ struct media_pad *remote;
+
+ remote = media_entity_remote_source(&video->pad);
+
+ if (remote == NULL ||
+ remote->entity->type != MEDIA_ENT_T_V4L2_SUBDEV)
+ return NULL;
+
+ if (pad)
+ *pad = remote->index;
+
+ return media_entity_to_v4l2_subdev(remote->entity);
+}
+
+/* get the format set at ouput pad of the adjacent subdev */
+static int
+__vpfe_video_get_format(struct vpfe_video_device *video,
+ struct v4l2_format *format)
+{
+ struct v4l2_subdev_format fmt;
+ struct v4l2_subdev *subdev;
+ struct media_pad *remote;
+ u32 pad;
+ int ret;
+
+ subdev = vpfe_video_remote_subdev(video, &pad);
+ if (subdev == NULL)
+ return -EINVAL;
+
+ fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ remote = media_entity_remote_source(&video->pad);
+ fmt.pad = remote->index;
+
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
+ if (ret == -ENOIOCTLCMD)
+ return -EINVAL;
+
+ format->type = video->type;
+ /* convert mbus_format to v4l2_format */
+ v4l2_fill_pix_format(&format->fmt.pix, &fmt.format);
+ mbus_to_pix(&fmt.format, &format->fmt.pix);
+
+ return 0;
+}
+
+/* return pointer to the VPFE video instance at the far end of the pipeline */
+static struct vpfe_video_device *
+vpfe_video_far_end(struct vpfe_video_device *video)
+{
+ struct media_entity *entity = &video->video_dev.entity;
+ struct media_device *mdev = entity->parent;
+ struct vpfe_video_device *far_end = NULL;
+ struct media_entity_graph graph;
+
+ mutex_lock(&mdev->graph_mutex);
+ media_entity_graph_walk_start(&graph, entity);
+
+ while ((entity = media_entity_graph_walk_next(&graph))) {
+ if (entity == &video->video_dev.entity)
+ continue;
+
+ if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
+ continue;
+
+ far_end = to_vpfe_video(media_entity_to_video_device(entity));
+ if (far_end->type != video->type)
+ break;
+
+ far_end = NULL;
+ }
+
+ mutex_unlock(&mdev->graph_mutex);
+
+ return far_end;
+}
+
+/* update pipe state selected by user */
+static int vpfe_update_pipe_state(struct vpfe_video_device *video)
+{
+ struct vpfe_pipeline *pipe = &video->pipe;
+ struct vpfe_video_device *far_end = NULL;
+ int ret;
+
+ far_end = vpfe_video_far_end(video);
+ if (far_end == NULL) {
+ /* possible that it is continous mode */
+ ret = vpfe_update_current_ext_subdev(video);
+ if (ret) {
+ printk(KERN_ERR "invalid external subdev\n");
+ return ret;
+ }
+ pipe->state = VPFE_PIPELINE_STREAM_CONTINUOUS;
+ pipe->output = video;
+ pipe->input_sd = vpfe_get_input_sd(video);
+ } else if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ pipe->state = VPFE_PIPELINE_STREAM_SINGLESHOT;
+ pipe->input = far_end;
+ pipe->output = video;
+ } else {
+ pipe->state = VPFE_PIPELINE_STREAM_SINGLESHOT;
+ pipe->output = far_end;
+ pipe->input = video;
+ }
+
+ video->initialized = 1;
+ video->skip_frame_count = 1;
+ video->skip_frame_count_init = 1;
+
+ return 0;
+}
+
+/* checks wether pipeline is ready for enabling */
+static int is_pipe_ready(struct vpfe_pipeline *pipe)
+{
+ if (pipe->state == VPFE_PIPELINE_STREAM_SINGLESHOT) {
+ if (!pipe->input->started ||
+ !(pipe->input->state & VPFE_VIDEO_BUFFER_QUEUED) ||
+ !pipe->output->started ||
+ !(pipe->output->state & VPFE_VIDEO_BUFFER_QUEUED))
+ return 0;
+ }
+
+ return 1;
+}
+
+/**
+ * Validate a pipeline by checking both ends of all links for format
+ * discrepancies.
+ *
+ * Return 0 if all formats match, or -EPIPE if at least one link is found with
+ * different formats on its two ends.
+ */
+static int vpfe_video_validate_pipeline(struct vpfe_pipeline *pipe)
+{
+ struct v4l2_subdev_format fmt_source;
+ struct v4l2_subdev_format fmt_sink;
+ struct v4l2_subdev *subdev;
+ struct media_pad *pad;
+ int ret;
+
+ subdev = vpfe_video_remote_subdev(pipe->output, NULL);
+ if (subdev == NULL)
+ return -EPIPE;
+
+ while (1) {
+ /* Retrieve the sink format */
+ pad = &subdev->entity.pads[0];
+ if (!(pad->flags & MEDIA_PAD_FL_INPUT))
+ break;
+
+ fmt_sink.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ fmt_sink.pad = pad->index;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL,
+ &fmt_sink);
+
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return -EPIPE;
+
+ /* Retrieve the source format */
+ pad = media_entity_remote_source(pad);
+ if (pad == NULL ||
+ pad->entity->type != MEDIA_ENT_T_V4L2_SUBDEV)
+ break;
+
+ subdev = media_entity_to_v4l2_subdev(pad->entity);
+
+ fmt_source.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ fmt_source.pad = pad->index;
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_source);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return -EPIPE;
+
+ /* Check if the two ends match */
+ if (fmt_source.format.code != fmt_sink.format.code ||
+ fmt_source.format.width != fmt_sink.format.width ||
+ fmt_source.format.height != fmt_sink.format.height)
+ return -EPIPE;
+ }
+
+ return 0;
+}
+
+/**
+ * vpfe_pipeline_enable - Enable streaming on a pipeline
+ * @vpfe_dev: vpfe device
+ * @pipe: vpfe pipeline
+ *
+ * Walk the entities chain starting at the pipeline output video node and start
+ * all modules in the chain in the given mode.
+ *
+ * Return 0 if successfull, or the return value of the failed video::s_stream
+ * operation otherwise.
+ */
+static int vpfe_pipeline_enable(struct vpfe_pipeline *pipe)
+{
+ struct media_entity_graph graph;
+ struct media_entity *entity;
+ struct v4l2_subdev *subdev;
+ struct media_device *mdev;
+ int ret = 0;
+
+ if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
+ entity = &pipe->input_sd->entity;
+ else
+ entity = &pipe->input->video_dev.entity;
+
+ mdev = entity->parent;
+
+ mutex_lock(&mdev->graph_mutex);
+ media_entity_graph_walk_start(&graph, entity);
+
+ while ((entity = media_entity_graph_walk_next(&graph))) {
+
+ if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
+ continue;
+
+ subdev = media_entity_to_v4l2_subdev(entity);
+
+ ret = v4l2_subdev_call(subdev, video, s_stream, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ break;
+ }
+
+ mutex_unlock(&mdev->graph_mutex);
+
+ return ret;
+}
+
+/**
+ * vpfe_pipeline_disable - Disable streaming on a pipeline
+ * @vpfe_dev: vpfe device
+ * @pipe: VPFE pipeline
+ *
+ * Walk the entities chain starting at the pipeline output video node and stop
+ * all modules in the chain.
+ *
+ * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
+ * can't be stopped.
+ */
+static int vpfe_pipeline_disable(struct vpfe_pipeline *pipe)
+{
+ struct media_entity_graph graph;
+ struct media_entity *entity;
+ struct v4l2_subdev *subdev;
+ struct media_device *mdev;
+ int ret = 0;
+
+ if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
+ entity = &pipe->input_sd->entity;
+ else
+ entity = &pipe->input->video_dev.entity;
+
+ mdev = entity->parent;
+
+ mutex_lock(&mdev->graph_mutex);
+ media_entity_graph_walk_start(&graph, entity);
+
+ while ((entity = media_entity_graph_walk_next(&graph))) {
+
+ if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
+ continue;
+
+ subdev = media_entity_to_v4l2_subdev(entity);
+
+ ret = v4l2_subdev_call(subdev, video, s_stream, 0);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ break;
+ }
+
+ mutex_unlock(&mdev->graph_mutex);
+
+ return (ret == 0) ? ret : -ETIMEDOUT ;
+}
+
+/**
+ * vpfe_pipeline_set_stream - Enable/disable streaming on a pipeline
+ * @vpfe_dev: VPFE device
+ * @pipe: VPFE pipeline
+ * @state: Stream state (stopped or active)
+ *
+ * Set the pipeline to the given stream state.
+ *
+ * Return 0 if successfull, or the return value of the failed video::s_stream
+ * operation otherwise.
+ */
+static int vpfe_pipeline_set_stream(struct vpfe_pipeline *pipe,
+ enum vpfe_pipeline_stream_state state)
+{
+ if (state == VPFE_PIPELINE_STREAM_STOPPED)
+ return vpfe_pipeline_disable(pipe);
+ else
+ return vpfe_pipeline_enable(pipe);
+}
+
+/*
+ * vpfe_open - open video device
+ * @file: file pointer
+ *
+ * initialize media pipeline state, allocate memory for file hadle
+ *
+ * Return 0 if successfull, or the return -ENODEV otherwise.
+ */
+static int vpfe_open(struct file *file)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_fh *fh;
+
+ /* Allocate memory for the file handle object */
+ fh = kzalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
+
+ if (NULL == fh)
+ return -ENOMEM;
+ /* store pointer to fh in private_data member of file */
+ file->private_data = fh;
+ fh->video = video;
+ mutex_lock(&video->lock);
+ /* If decoder is not initialized. initialize it */
+ if (!video->initialized) {
+ if (vpfe_update_pipe_state(video)) {
+ mutex_unlock(&video->lock);
+ return -ENODEV;
+ }
+ }
+ /* Increment device usrs counter */
+ video->usrs++;
+ /* Set io_allowed member to false */
+ fh->io_allowed = 0;
+ /* Initialize priority of this instance to default priority */
+ fh->prio = V4L2_PRIORITY_UNSET;
+ v4l2_prio_open(&video->prio, &fh->prio);
+ mutex_unlock(&video->lock);
+
+ return 0;
+}
+
+/* get the next buffer available from dma queue */
+unsigned long vpfe_get_next_buffer(struct vpfe_video_device *video)
+{
+ /* mark next buffer as active */
+ video->next_frm = list_entry(video->dma_queue.next,
+ struct videobuf_buffer, queue);
+
+ /* in single shot mode both curr_frm
+ and next_frm point to same buffer */
+ video->cur_frm = video->next_frm;
+ list_del(&video->next_frm->queue);
+ video->next_frm->state = VIDEOBUF_ACTIVE;
+
+ return videobuf_to_dma_contig(video->next_frm);
+}
+
+/* schedule the next buffer which is available on dma queue */
+void vpfe_schedule_next_buffer(struct vpfe_video_device *video)
+{
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ unsigned long addr;
+
+ video->next_frm = list_entry(video->dma_queue.next,
+ struct videobuf_buffer, queue);
+ list_del(&video->next_frm->queue);
+ video->next_frm->state = VIDEOBUF_ACTIVE;
+ addr = videobuf_to_dma_contig(video->next_frm);
+
+ video->ops->queue(vpfe_dev, addr);
+}
+
+/* schedule the buffer for capturing bottom field */
+void vpfe_schedule_bottom_field(struct vpfe_video_device *video)
+{
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ unsigned long addr;
+
+ addr = videobuf_to_dma_contig(video->cur_frm);
+ addr += video->field_off;
+
+ video->ops->queue(vpfe_dev, addr);
+}
+
+/* make buffer available for dequeue */
+void vpfe_process_buffer_complete(struct vpfe_video_device *video)
+{
+ struct vpfe_pipeline *pipe = &video->pipe;
+ struct timespec timespec;
+ s64 nsec;
+
+ ktime_get_ts(×pec);
+ nsec = timespec_to_ns(×pec);
+
+ video->cur_frm->ts = ns_to_timeval(nsec);
+ video->cur_frm->state = VIDEOBUF_DONE;
+ video->cur_frm->size = video->fmt.fmt.pix.sizeimage;
+ wake_up_interruptible(&video->cur_frm->done);
+ /* for continous mode, proceed with next buffer */
+ if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS)
+ video->cur_frm = video->next_frm;
+}
+
+/* vpfe_stop_capture: stop streaming in ccdc/isif */
+static void vpfe_stop_capture(struct vpfe_video_device *video)
+{
+ struct vpfe_pipeline *pipe = &video->pipe;
+
+ video->started = 0;
+
+ if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ return;
+
+ vpfe_pipeline_set_stream(pipe, VPFE_PIPELINE_STREAM_STOPPED);
+}
+
+/*
+ * vpfe_release - release video device
+ * @file: file pointer
+ *
+ * deletes buffer queue, frees the buffers and the vpfe file handle
+ *
+ * Return 0
+ */
+static int vpfe_release(struct file *file)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_fh *fh = file->private_data;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
+
+ /* Get the device lock */
+ mutex_lock(&video->lock);
+ /* if this instance is doing IO */
+ if (fh->io_allowed) {
+ if (video->started) {
+ vpfe_stop_capture(video);
+ videobuf_streamoff(&video->buffer_queue);
+ }
+ video->io_usrs = 0;
+ }
+
+ /* Decrement device usrs counter */
+ video->usrs--;
+ /* Close the priority */
+ v4l2_prio_close(&video->prio, fh->prio);
+
+ /* If this is the last file handle */
+ if (!video->usrs)
+ video->initialized = 0;
+
+ mutex_unlock(&video->lock);
+ file->private_data = NULL;
+ /* Free memory allocated to file handle object */
+ kzfree(fh);
+
+ return 0;
+}
+
+/*
+ * vpfe_mmap : It is used to map kernel space buffers
+ * into user spaces
+ */
+static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
+
+ return videobuf_mmap_mapper(&video->buffer_queue, vma);
+}
+
+/*
+ * vpfe_poll: It is used for select/poll system call
+ */
+static unsigned int vpfe_poll(struct file *file, poll_table *wait)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
+
+ if (video->started)
+ return videobuf_poll_stream(file,
+ &video->buffer_queue, wait);
+
+ return 0;
+}
+
+/* vpfe capture driver file operations */
+static const struct v4l2_file_operations vpfe_fops = {
+ .owner = THIS_MODULE,
+ .open = vpfe_open,
+ .release = vpfe_release,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = vpfe_mmap,
+ .poll = vpfe_poll
+};
+
+/*
+ * vpfe_querycap - query capabilities of video device
+ * @file: file pointer
+ * @priv: void pointer
+ * @cap: pointer to v4l2_capability structure
+ *
+ * fills v4l2 capabilities structure
+ *
+ * Return 0
+ */
+static int vpfe_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
+
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ else
+ cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
+
+ cap->version = VPFE_CAPTURE_VERSION_CODE;
+ strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
+ strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
+ strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
+
+ return 0;
+}
+
+/*
+ * vpfe_g_fmt - get the format which is active on video device
+ * @file: file pointer
+ * @priv: void pointer
+ * @fmt: pointer to v4l2_format structure
+ *
+ * fills v4l2 format structure with active format
+ *
+ * Return 0
+ */
+static int vpfe_g_fmt(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt\n");
+ /* Fill in the information about format */
+ *fmt = video->fmt;
+
+ return 0;
+}
+
+/*
+ * vpfe_enum_fmt - enum formats supported on media chain
+ * @file: file pointer
+ * @priv: void pointer
+ * @fmt: pointer to v4l2_fmtdesc structure
+ *
+ * fills v4l2_fmtdesc structure with output format set on adjacent subdev,
+ * only one format is enumearted as subdevs are already configured
+ *
+ * Return 0 if successfull, error code otherwise
+ */
+static int vpfe_enum_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *fmt)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct v4l2_subdev_format sd_fmt;
+ struct v4l2_mbus_framefmt mbus;
+ struct v4l2_subdev *subdev;
+ struct v4l2_format format;
+ struct media_pad *remote;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt\n");
+
+ /* since already subdev pad format is set,
+ only one pixel format is available */
+ if (fmt->index > 0) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Invalid index\n");
+ return -EINVAL;
+ }
+
+ /* get the remote pad */
+ remote = media_entity_remote_source(&video->pad);
+ if (remote == NULL) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "invalid remote pad \
+ for video node\n");
+ return -EINVAL;
+ }
+
+ /* get the remote subdev */
+ subdev = vpfe_video_remote_subdev(video, NULL);
+ if (subdev == NULL) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "invalid remote subdev \
+ for video node\n");
+ return -EINVAL;
+ }
+
+ sd_fmt.pad = remote->index;
+ sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ /* get output format of remote subdev */
+ ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL,
+ &sd_fmt);
+ if (ret) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "invalid remote subdev \
+ for video node\n");
+ return ret;
+ }
+ /* convert to pix format */
+ mbus.code = sd_fmt.format.code;
+ mbus_to_pix(&mbus, &format.fmt.pix);
+
+ /* copy the result */
+ fmt->pixelformat = format.fmt.pix.pixelformat;
+
+ return 0;
+}
+
+/*
+ * vpfe_s_fmt - set the format on video device
+ * @file: file pointer
+ * @priv: void pointer
+ * @fmt: pointer to v4l2_format structure
+ *
+ * validate and set the format on video device
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_s_fmt(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct v4l2_format format;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt\n");
+
+ /* If streaming is started, return error */
+ if (video->started) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
+ return -EBUSY;
+ }
+
+ /* get adjacent subdev's output pad format */
+ ret = __vpfe_video_get_format(video, &format);
+ if (ret)
+ return ret;
+
+ *fmt = format;
+
+ video->fmt = *fmt;
+
+ return 0;
+}
+
+/*
+ * vpfe_try_fmt - try the format on video device
+ * @file: file pointer
+ * @priv: void pointer
+ * @fmt: pointer to v4l2_format structure
+ *
+ * validate the format, update with correct format
+ * based on output format set on adjacent subdev
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_try_fmt(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct v4l2_format format;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt\n");
+
+ /* get adjacent subdev's output pad format */
+ ret = __vpfe_video_get_format(video, &format);
+ if (ret)
+ return ret;
+
+ *fmt = format;
+
+ return 0;
+}
+
+/*
+ * vpfe_enum_input - enum inputs supported on media chain
+ * @file: file pointer
+ * @priv: void pointer
+ * @fmt: pointer to v4l2_fmtdesc structure
+ *
+ * fills v4l2_input structure with input available on media chain,
+ * only one input is enumearted as media chain is setup by this time
+ *
+ * Return 0 if successfull, -EINVAL is media chain is invalid
+ */
+static int vpfe_enum_input(struct file *file, void *priv,
+ struct v4l2_input *inp)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_ext_subdev_info *sdinfo = video->current_ext_subdev;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
+
+ /* enumerate from the subdev user has choosen through mc */
+ if (inp->index < sdinfo->num_inputs) {
+ memcpy(inp, &sdinfo->inputs[inp->index],
+ sizeof(struct v4l2_input));
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * vpfe_g_input - get index of the input which is active
+ * @file: file pointer
+ * @priv: void pointer
+ * @index: pointer to unsigned int
+ *
+ * set index with input index which is active
+ *
+ * Return 0
+ */
+static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
+
+ *index = video->current_input;
+
+ return 0;
+}
+
+/*
+ * vpfe_s_input - set input which is pointed by input index
+ * @file: file pointer
+ * @priv: void pointer
+ * @index: pointer to unsigned int
+ *
+ * set input on external subdev
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct ccdc_hw_device *ccdc_dev = vpfe_dev->vpfe_ccdc.ccdc_dev;
+ struct imp_hw_interface *imp_hw_if = vpfe_dev->vpfe_previewer.imp_hw_if;
+ struct vpfe_ext_subdev_info *sdinfo;
+ struct vpfe_route *route;
+ struct v4l2_input *inps;
+ u32 output;
+ u32 input;
+ int ret;
+ int i;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
+
+ ret = mutex_lock_interruptible(&video->lock);
+ if (ret)
+ return ret;
+
+ /*
+ * If streaming is started return device busy
+ * error
+ */
+ if (video->started) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
+ ret = -EBUSY;
+ goto unlock_out;
+ }
+
+ sdinfo = video->current_ext_subdev;
+
+ if (!sdinfo->registered) {
+ ret = -EINVAL;
+ goto unlock_out;
+ }
+
+ if (vpfe_dev->cfg->setup_input) {
+ if (vpfe_dev->cfg->setup_input(sdinfo->grp_id) < 0) {
+ ret = -EFAULT;
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+ "couldn't setup input for %s\n",
+ sdinfo->module_name);
+ goto unlock_out;
+ }
+ }
+
+ route = &sdinfo->routes[index];
+ if (route && sdinfo->can_route) {
+ input = route->input;
+ output = route->output;
+ ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
+ sdinfo->grp_id, video,
+ s_routing, input, output, 0);
+
+ if (ret) {
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+ "s_input:error in setting input in decoder\n");
+ ret = -EINVAL;
+ goto unlock_out;
+ }
+ }
+
+ /* set standards set by subdev in video device */
+ for (i = 0; i < sdinfo->num_inputs; i++) {
+ inps = &sdinfo->inputs[i];
+ video->video_dev.tvnorms |= inps->std;
+ }
+
+ /* set the bus/interface parameter for the sub device in ccdc */
+ ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
+ if (ret)
+ goto unlock_out;
+
+ /* update the if parameters to imp hw interface */
+ if (imp_hw_if && imp_hw_if->set_hw_if_param)
+ ret = imp_hw_if->set_hw_if_param(&sdinfo->ccdc_if_params);
+ if (ret)
+ goto unlock_out;
+
+ video->current_input = index;
+
+unlock_out:
+ mutex_unlock(&video->lock);
+ return ret;
+}
+
+/*
+ * vpfe_querystd - query std which is being input on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @std_id: pointer to v4l2_std_id structure
+ *
+ * call external subdev through v4l2_device_call_until_err to
+ * get the std that is being active.
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sdinfo;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
+
+ ret = mutex_lock_interruptible(&video->lock);
+ sdinfo = video->current_ext_subdev;
+ if (ret)
+ return ret;
+
+ /* Call querystd function of decoder device */
+ ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
+ video, querystd, std_id);
+ mutex_unlock(&video->lock);
+
+ return ret;
+}
+
+/*
+ * vpfe_s_std - set std on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @std_id: pointer to v4l2_std_id structure
+ *
+ * set std pointed by std_id on external subdev by calling it using
+ * v4l2_device_call_until_err
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sdinfo;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
+
+ /* Call decoder driver function to set the standard */
+ ret = mutex_lock_interruptible(&video->lock);
+ if (ret)
+ return ret;
+
+ sdinfo = video->current_ext_subdev;
+ /* If streaming is started, return device busy error */
+ if (video->started) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
+ ret = -EBUSY;
+ goto unlock_out;
+ }
+
+ ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
+ core, s_std, *std_id);
+ if (ret < 0) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
+ goto unlock_out;
+ }
+
+unlock_out:
+ mutex_unlock(&video->lock);
+ return ret;
+}
+
+/*
+ * vpfe_enum_preset - enumerate dv_preset which are supported by
+ * to external subdev
+ *
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_dv_enum_preset structure
+ *
+ * enum dv_preset's which are supported by external subdev through
+ * v4l2_subdev_call
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_enum_preset(struct file *file, void *fh,
+ struct v4l2_dv_enum_preset *preset)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_preset\n");
+
+ return v4l2_subdev_call(subdev, video, enum_dv_presets, preset);
+}
+
+/*
+ * vpfe_query_preset - query the dv_preset which is being input
+ * to external subdev
+ *
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_preset structure
+ *
+ * get dv_preset which is being input on external subdev through
+ * v4l2_subdev_call
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_query_preset(struct file *file, void *fh,
+ struct v4l2_dv_preset *preset)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_query_preset\n");
+
+ return v4l2_subdev_call(subdev, video, query_dv_preset, preset);
+}
+
+/*
+ * vpfe_s_preset - set dv_preset on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_preset structure
+ *
+ * set dv_preset pointed by preset on external subdev through
+ * v4l2_device_call_until_err, this configures amplifier also
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_s_preset(struct file *file, void *fh,
+ struct v4l2_dv_preset *preset)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_preset\n");
+
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
+ video->current_ext_subdev->grp_id,
+ video, s_dv_preset, preset);
+}
+
+/*
+ * vpfe_g_preset - get dv_preset which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @preset: pointer to v4l2_preset structure
+ *
+ * get dv_preset which is set on external subdev through
+ * v4l2_subdev_call
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_g_preset(struct file *file, void *fh,
+ struct v4l2_dv_preset *preset)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct v4l2_subdev *subdev = video->current_ext_subdev->subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_preset\n");
+
+ return v4l2_subdev_call(subdev, video, query_dv_preset, preset);
+}
+
+/*
+ * Videobuf operations
+ */
+static int vpfe_videobuf_setup(struct videobuf_queue *vq,
+ unsigned int *count,
+ unsigned int *size)
+{
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_pipeline *pipe = &video->pipe;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
+
+ *size = video->fmt.fmt.pix.sizeimage;
+
+ if (vpfe_dev->video_limit) {
+ while (*size * *count > vpfe_dev->video_limit)
+ (*count)--;
+ }
+
+ if (pipe->state == VPFE_PIPELINE_STREAM_CONTINUOUS) {
+ if (*count < CONT_MIN_NUM_BUFFERS)
+ *count = CONT_MIN_NUM_BUFFERS;
+ } else
+ /* for single-shot mode */
+ *count = SS_NUM_BUFFERS;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
+ "count=%d, size=%d\n", *count, *size);
+
+ return 0;
+}
+
+static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ unsigned long addr;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_prepare\n");
+
+ /* If buffer is not initialized, initialize it */
+ if (VIDEOBUF_NEEDS_INIT == vb->state) {
+ vb->width = video->fmt.fmt.pix.width;
+ vb->height = video->fmt.fmt.pix.height;
+ vb->size = video->fmt.fmt.pix.sizeimage;
+ vb->field = field;
+
+ ret = videobuf_iolock(vq, vb, NULL);
+ if (ret < 0)
+ return ret;
+
+ addr = videobuf_to_dma_contig(vb);
+ /* Make sure user addresses are aligned to 32 bytes */
+ if (!ALIGN(addr, 32))
+ return -EINVAL;
+
+ vb->state = VIDEOBUF_PREPARED;
+ }
+
+ return 0;
+}
+
+static void vpfe_videobuf_queue(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ /* Get the file handle object and device object */
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_pipeline *pipe = &video->pipe;
+ unsigned long flags;
+ unsigned long empty;
+ unsigned long addr;
+
+ empty = list_empty(&video->dma_queue);
+
+ /* add the buffer to the DMA queue */
+ spin_lock_irqsave(&video->dma_queue_lock, flags);
+ list_add_tail(&vb->queue, &video->dma_queue);
+ spin_unlock_irqrestore(&video->dma_queue_lock, flags);
+
+ /* Change state of the buffer */
+ vb->state = VIDEOBUF_QUEUED;
+
+ /* this case happens in case of single shot */
+ if (empty && video->started && (pipe->state ==
+ VPFE_PIPELINE_STREAM_SINGLESHOT)){
+ spin_lock(&video->dma_queue_lock);
+ addr = vpfe_get_next_buffer(video);
+ video->ops->queue(vpfe_dev, addr);
+
+ video->state |= VPFE_VIDEO_BUFFER_QUEUED;
+ spin_unlock(&video->dma_queue_lock);
+ /* we need to enable h/w each time in single shot */
+ if (is_pipe_ready(pipe))
+ vpfe_pipeline_set_stream(pipe,
+ VPFE_PIPELINE_STREAM_SINGLESHOT);
+ }
+}
+
+static void vpfe_videobuf_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct vpfe_fh *fh = vq->priv_data;
+ struct vpfe_video_device *video = fh->video;
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
+
+ if (video->memory == V4L2_MEMORY_MMAP)
+ videobuf_dma_contig_free(vq, vb);
+ vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static struct videobuf_queue_ops vpfe_videobuf_qops = {
+ .buf_setup = vpfe_videobuf_setup,
+ .buf_prepare = vpfe_videobuf_prepare,
+ .buf_queue = vpfe_videobuf_queue,
+ .buf_release = vpfe_videobuf_release,
+};
+
+/*
+ * vpfe_reqbufs. supported REQBUF only once opening
+ * the device.
+ */
+static int vpfe_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *req_buf)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_fh *fh = file->private_data;
+ int ret;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
+
+ if ((V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) &&
+ (V4L2_BUF_TYPE_VIDEO_OUTPUT != req_buf->type)) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
+ return -EINVAL;
+ }
+
+ ret = mutex_lock_interruptible(&video->lock);
+ if (ret)
+ return ret;
+
+ if (video->io_usrs != 0) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
+ ret = -EBUSY;
+ goto unlock_out;
+ }
+
+ video->memory = req_buf->memory;
+ videobuf_queue_dma_contig_init(&video->buffer_queue,
+ &vpfe_videobuf_qops,
+ vpfe_dev->pdev,
+ &video->irqlock,
+ req_buf->type,
+ video->fmt.fmt.pix.field,
+ sizeof(struct videobuf_buffer),
+ fh,
+ NULL);
+
+ fh->io_allowed = 1;
+ video->io_usrs = 1;
+ INIT_LIST_HEAD(&video->dma_queue);
+ ret = videobuf_reqbufs(&video->buffer_queue, req_buf);
+
+unlock_out:
+ mutex_unlock(&video->lock);
+ return ret;
+}
+
+/*
+ * vpfe_querybuf. query buffers for exchange
+ */
+static int vpfe_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
+
+ if ((V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) &&
+ (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type)) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
+ return -EINVAL;
+ }
+
+ if (video->memory != V4L2_MEMORY_MMAP) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
+ return -EINVAL;
+ }
+
+ /* Call videobuf_querybuf to get information */
+ return videobuf_querybuf(&video->buffer_queue, buf);
+}
+
+/*
+ * vpfe_qbuf. queue buffers for capture or processing
+ */
+static int vpfe_qbuf(struct file *file, void *priv,
+ struct v4l2_buffer *p)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_fh *fh = file->private_data;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
+
+ if ((V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) &&
+ (V4L2_BUF_TYPE_VIDEO_OUTPUT != p->type)) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
+ return -EINVAL;
+ }
+
+ /*
+ * If this file handle is not allowed to do IO,
+ * return error
+ */
+ if (!fh->io_allowed) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
+ return -EACCES;
+ }
+
+ return videobuf_qbuf(&video->buffer_queue, p);
+}
+
+/*
+ * vpfe_dqbuf. deque buffer which is done with processing
+ */
+static int vpfe_dqbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
+
+ if ((V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) &&
+ (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf->type)) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
+ return -EINVAL;
+ }
+
+ return videobuf_dqbuf(&video->buffer_queue,
+ buf, file->f_flags & O_NONBLOCK);
+}
+
+/* vpfe_start_capture: start streaming on all the subdevs */
+static int vpfe_start_capture(struct vpfe_video_device *video)
+{
+ struct vpfe_pipeline *pipe = &video->pipe;
+ int ret = 0;
+
+ video->started = 1;
+
+ if (is_pipe_ready(pipe))
+ ret = vpfe_pipeline_set_stream(pipe, pipe->state);
+
+ return ret;
+}
+
+/*
+ * vpfe_streamon - get dv_preset which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @buf_type: enum v4l2_buf_type
+ *
+ * queue buffer onto hardware for capture/processing and
+ * start all the subdevs which are in media chain
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type buf_type)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_fh *fh = file->private_data;
+ struct vpfe_ext_subdev_info *sdinfo;
+ unsigned long addr;
+
+ struct vpfe_pipeline *pipe = &video->pipe;
+ int ret = -EINVAL;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
+
+ if ((V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) &&
+ (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type)) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
+ return ret;
+ }
+
+ /* If file handle is not allowed IO, return error */
+ if (!fh->io_allowed) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
+ return -EACCES;
+ }
+
+ sdinfo = video->current_ext_subdev;
+
+ /* If buffer queue is empty, return error */
+ if (list_empty(&video->buffer_queue.stream)) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
+ return -EIO;
+ }
+
+ /* Validate the pipeline */
+ if (V4L2_BUF_TYPE_VIDEO_CAPTURE == buf_type) {
+ ret = vpfe_video_validate_pipeline(pipe);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Call videobuf_streamon to start streaming * in videobuf */
+ ret = videobuf_streamon(&video->buffer_queue);
+ if (ret)
+ return ret;
+
+ ret = mutex_lock_interruptible(&video->lock);
+ if (ret)
+ goto streamoff;
+ /* Get the next frame from the buffer queue */
+ video->next_frm = list_entry(video->dma_queue.next,
+ struct videobuf_buffer, queue);
+ video->cur_frm = video->next_frm;
+ /* Remove buffer from the buffer queue */
+ list_del(&video->cur_frm->queue);
+ /* Mark state of the current frame to active */
+ video->cur_frm->state = VIDEOBUF_ACTIVE;
+ /* Initialize field_id and started member */
+ video->field_id = 0;
+ addr = videobuf_to_dma_contig(video->cur_frm);
+
+ video->ops->queue(vpfe_dev, addr);
+
+ video->state |= VPFE_VIDEO_BUFFER_QUEUED;
+
+ /* Image processor chained in the path */
+ if (!cpu_is_davinci_dm365() &&
+ !video->current_ext_subdev->is_camera) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "Doesn't support chaining\n");
+ goto unlock_out;
+ }
+
+ ret = 0;
+
+ ret = vpfe_start_capture(video);
+ if (ret)
+ goto unlock_out;
+
+ mutex_unlock(&video->lock);
+
+ return ret;
+unlock_out:
+ mutex_unlock(&video->lock);
+streamoff:
+ ret = videobuf_streamoff(&video->buffer_queue);
+ return ret;
+}
+
+/*
+ * vpfe_streamoff - get dv_preset which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @buf_type: enum v4l2_buf_type
+ *
+ * stop all the subdevs which are in media chain
+ *
+ * Return 0 on success, error code otherwise
+ */
+static int vpfe_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type buf_type)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_fh *fh = file->private_data;
+ int ret = 0;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
+
+ if ((V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) &&
+ (V4L2_BUF_TYPE_VIDEO_OUTPUT != buf_type)) {
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "Invalid buf type\n");
+ return -EINVAL;
+ }
+
+ /* If io is allowed for this file handle, return error */
+ if (!fh->io_allowed) {
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "fh->io_allowed\n");
+ return -EACCES;
+ }
+
+ /* If streaming is not started, return error */
+ if (!video->started) {
+ v4l2_err(&vpfe_dev->v4l2_dev, "device is not started\n");
+ return -EINVAL;
+ }
+
+ ret = mutex_lock_interruptible(&video->lock);
+ if (ret)
+ return ret;
+
+ vpfe_stop_capture(video);
+
+ video->pipe.state = VPFE_PIPELINE_STREAM_STOPPED;
+
+ ret = videobuf_streamoff(&video->buffer_queue);
+ mutex_unlock(&video->lock);
+
+ return ret;
+}
+
+/*
+ * vpfe_queryctrl - query for v4l2 controls which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @ctrl: pointer to v4l2_control structure
+ *
+ * get the v4l2 controls active on external subdev through
+ * v4l2_device_call_until_err
+ *
+ * Return return value returned by v4l2_device_call_until_err
+ */
+static int vpfe_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sub_dev = video->current_ext_subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_queryctrl\n");
+
+ /* pass it to sub device */
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sub_dev->grp_id,
+ core, queryctrl, qc);
+}
+
+/*
+ * vpfe_g_ctrl - get the v4l2 controls which is set on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @ctrl: pointer to v4l2_control structure
+ *
+ * get the v4l2 controls set on external subdev through
+ * v4l2_device_call_until_err
+ *
+ * Return return value returned by v4l2_device_call_until_err
+ */
+static int vpfe_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sub_dev = video->current_ext_subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_ctrl\n");
+
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sub_dev->grp_id,
+ core, g_ctrl, ctrl);
+}
+
+/*
+ * vpfe_s_ctrl - set the v4l2 controls on external subdev
+ * @file: file pointer
+ * @priv: void pointer
+ * @ctrl: pointer to v4l2_control structure
+ *
+ * call external subdev through v4l2_device_call_until_err to
+ * set v4l2 controls
+ *
+ * Return return value returned by v4l2_device_call_until_err
+ */
+static int vpfe_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct vpfe_video_device *video = video_drvdata(file);
+ struct vpfe_device *vpfe_dev = video->vpfe_dev;
+ struct vpfe_ext_subdev_info *sub_dev = video->current_ext_subdev;
+
+ v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_ctrl\n");
+
+ return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sub_dev->grp_id,
+ core, s_ctrl, ctrl);
+}
+
+/* vpfe capture ioctl operations */
+static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
+ .vidioc_querycap = vpfe_querycap,
+ .vidioc_g_fmt_vid_cap = vpfe_g_fmt,
+ .vidioc_s_fmt_vid_cap = vpfe_s_fmt,
+ .vidioc_try_fmt_vid_cap = vpfe_try_fmt,
+ .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt,
+ .vidioc_g_fmt_vid_out = vpfe_g_fmt,
+ .vidioc_s_fmt_vid_out = vpfe_s_fmt,
+ .vidioc_try_fmt_vid_out = vpfe_try_fmt,
+ .vidioc_enum_fmt_vid_out = vpfe_enum_fmt,
+ .vidioc_enum_input = vpfe_enum_input,
+ .vidioc_g_input = vpfe_g_input,
+ .vidioc_s_input = vpfe_s_input,
+ .vidioc_querystd = vpfe_querystd,
+ .vidioc_s_std = vpfe_s_std,
+ .vidioc_enum_dv_presets = vpfe_enum_preset,
+ .vidioc_query_dv_preset = vpfe_query_preset,
+ .vidioc_s_dv_preset = vpfe_s_preset,
+ .vidioc_g_dv_preset = vpfe_g_preset,
+ .vidioc_reqbufs = vpfe_reqbufs,
+ .vidioc_querybuf = vpfe_querybuf,
+ .vidioc_qbuf = vpfe_qbuf,
+ .vidioc_dqbuf = vpfe_dqbuf,
+ .vidioc_streamon = vpfe_streamon,
+ .vidioc_streamoff = vpfe_streamoff,
+ .vidioc_queryctrl = vpfe_queryctrl,
+ .vidioc_g_ctrl = vpfe_g_ctrl,
+ .vidioc_s_ctrl = vpfe_s_ctrl,
+};
+
+/**
+ * VPFE video core operations
+ */
+static const struct vpfe_video_operations vpfe_video_dummy_ops = {
+};
+
+/* VPFE video init function */
+int vpfe_video_init(struct vpfe_video_device *video, const char *name)
+{
+ const char *direction;
+ int ret;
+
+ switch (video->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ direction = "output";
+ video->pad.flags = MEDIA_PAD_FL_INPUT;
+ video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ break;
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ direction = "input";
+ video->pad.flags = MEDIA_PAD_FL_OUTPUT;
+ video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Initialize field of video device */
+ video->video_dev.release = video_device_release;
+ video->video_dev.fops = &vpfe_fops;
+ video->video_dev.ioctl_ops = &vpfe_ioctl_ops;
+ video->video_dev.minor = -1;
+ video->video_dev.tvnorms = 0;
+ video->video_dev.current_norm = V4L2_STD_NTSC;
+
+ snprintf(video->video_dev.name, sizeof(video->video_dev.name),
+ "DAVINCI VIDEO %s %s", name, direction);
+
+ /* Initialize prio member of device object */
+ v4l2_prio_init(&video->prio);
+
+ spin_lock_init(&video->irqlock);
+ spin_lock_init(&video->dma_queue_lock);
+ mutex_init(&video->lock);
+
+ ret = media_entity_init(&video->video_dev.entity,
+ 1, &video->pad, 0);
+ if (ret < 0)
+ return ret;
+
+ video_set_drvdata(&video->video_dev, video);
+
+ return 0;
+}
+
+/* vpfe video device register function */
+int vpfe_video_register(struct vpfe_video_device *video,
+ struct v4l2_device *vdev)
+{
+ int ret;
+
+ video->video_dev.v4l2_dev = vdev;
+
+ ret = video_register_device(&video->video_dev, VFL_TYPE_GRABBER, -1);
+ if (ret < 0)
+ printk(KERN_ERR "%s: could not register video device (%d)\n",
+ __func__, ret);
+
+ return ret;
+}
+
+/* vpfe video device unregister function */
+void vpfe_video_unregister(struct vpfe_video_device *video)
+{
+ if (video_is_registered(&video->video_dev)) {
+ media_entity_cleanup(&video->video_dev.entity);
+ video_unregister_device(&video->video_dev);
+ }
+}
new file mode 100644
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Inc
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* All video device related structures will go here */
+#ifndef _VPFE_VIDEO_H
+#define _VPFE_VIDEO_H
+
+#include <media/media-entity.h>
+#include <media/videobuf-dma-contig.h>
+
+struct vpfe_device;
+
+/*
+ * struct vpfe_video_operations - VPFE video operations
+ * @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
+ * if there was no buffer previously queued.
+ */
+struct vpfe_video_operations {
+ void(*queue)(struct vpfe_device *vpfe_dev, unsigned long addr);
+};
+
+enum vpfe_pipeline_stream_state {
+ VPFE_PIPELINE_STREAM_STOPPED,
+ VPFE_PIPELINE_STREAM_CONTINUOUS,
+ VPFE_PIPELINE_STREAM_SINGLESHOT
+};
+
+enum vpfe_video_state {
+ /* indicates that buffer is queued */
+ VPFE_VIDEO_BUFFER_QUEUED = 1,
+};
+
+struct vpfe_pipeline {
+ /* media pipeline */
+ struct media_pipeline *pipe;
+ /* state of the pipeline, continous,
+ single-shot or stopped */
+ enum vpfe_pipeline_stream_state state;
+ /* input subdev, tvp514x, mt9p031, tvp7002
+ in case of continous mode */
+ struct v4l2_subdev *input_sd;
+ /* input video node in case of single-shot mode */
+ struct vpfe_video_device *input;
+ /* capturing video node */
+ struct vpfe_video_device *output;
+};
+
+#define to_vpfe_pipeline(__e) \
+ container_of((__e)->pipe, struct vpfe_pipeline, pipe)
+
+#define to_vpfe_video(vdev) \
+ container_of(vdev, struct vpfe_video_device, video_dev)
+
+struct vpfe_video_device {
+ /* vpfe device */
+ struct vpfe_device *vpfe_dev;
+ /* video dev */
+ struct video_device video_dev;
+ /* media pad of video entity */
+ struct media_pad pad;
+ /* video operations supported by video device */
+ const struct vpfe_video_operations *ops;
+ /* type of the video buffers used by user */
+ enum v4l2_buf_type type;
+ /* Indicates id of the field which is being captured */
+ u32 field_id;
+ /* pipiline for which video device is part of */
+ struct vpfe_pipeline pipe;
+ /* Indicates whether streaming started */
+ u8 started;
+ /* Indicates state of the stream */
+ unsigned int state;
+ /* current input at the sub device */
+ int current_input;
+ /*
+ * This field keeps track of type of buffer exchange mechanism
+ * user has selected
+ */
+ enum v4l2_memory memory;
+ /* Used to keep track of state of the priority */
+ struct v4l2_prio_state prio;
+ /* number of open instances of the channel */
+ u32 usrs;
+ /* flag to indicate whether decoder is initialized */
+ u8 initialized;
+ /* skip frame count */
+ u8 skip_frame_count;
+ /* skip frame count init value */
+ u8 skip_frame_count_init;
+ /* time per frame for skipping */
+ struct v4l2_fract timeperframe;
+ /* ptr to currently selected sub device */
+ struct vpfe_ext_subdev_info *current_ext_subdev;
+ /* Pointer pointing to current v4l2_buffer */
+ struct videobuf_buffer *cur_frm;
+ /* Pointer pointing to next v4l2_buffer */
+ struct videobuf_buffer *next_frm;
+ /* Used to store pixel format */
+ struct v4l2_format fmt;
+ /* Buffer queue used in video-buf */
+ struct videobuf_queue buffer_queue;
+ /* Queue of filled frames */
+ struct list_head dma_queue;
+ /* Used in video-buf */
+ spinlock_t irqlock;
+ /* IRQ lock for DMA queue */
+ spinlock_t dma_queue_lock;
+ /* lock used to access this structure */
+ struct mutex lock;
+ /* number of users performing IO */
+ u32 io_usrs;
+ /*
+ * offset where second field starts from the starting of the
+ * buffer for field seperated YCbCr formats
+ */
+ u32 field_off;
+};
+
+void vpfe_video_unregister(struct vpfe_video_device *video);
+int vpfe_video_register(struct vpfe_video_device *video,
+ struct v4l2_device *vdev);
+int vpfe_video_init(struct vpfe_video_device *video, const char *name);
+
+void vpfe_process_buffer_complete(struct vpfe_video_device *video);
+void vpfe_schedule_bottom_field(struct vpfe_video_device *video);
+void vpfe_schedule_next_buffer(struct vpfe_video_device *video);
+unsigned long vpfe_get_next_buffer(struct vpfe_video_device *video);
+#endif