// SPDX-License-Identifier: GPL-2.0 /* * Broadcom BCM2835 V4L2 driver * * Copyright © 2013 Raspberry Pi (Trading) Ltd. * * Authors: Vincent Sanders @ Collabora * Dave Stevenson @ Broadcom * (now [email protected]) * Simon Mellor @ Broadcom * Luke Diamand @ Broadcom */ #include <linux/dma-mapping.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <media/videobuf2-vmalloc.h> #include <media/videobuf2-dma-contig.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-fh.h> #include <media/v4l2-event.h> #include <media/v4l2-common.h> #include <linux/delay.h> #include "../interface/vchiq_arm/vchiq_bus.h" #include "../vchiq-mmal/mmal-common.h" #include "../vchiq-mmal/mmal-encodings.h" #include "../vchiq-mmal/mmal-vchiq.h" #include "../vchiq-mmal/mmal-msg.h" #include "../vchiq-mmal/mmal-parameters.h" #include "bcm2835-camera.h" #define MIN_WIDTH … #define MIN_HEIGHT … #define MIN_BUFFER_SIZE … #define MAX_VIDEO_MODE_WIDTH … #define MAX_VIDEO_MODE_HEIGHT … #define MAX_BCM2835_CAMERAS … int bcm2835_v4l2_debug; module_param_named(debug, bcm2835_v4l2_debug, int, 0644); MODULE_PARM_DESC(…) …; #define UNSET … static int video_nr[] = …; module_param_array(…); MODULE_PARM_DESC(…) …; static int max_video_width = …; static int max_video_height = …; module_param(max_video_width, int, 0644); MODULE_PARM_DESC(…) …; module_param(max_video_height, int, 0644); MODULE_PARM_DESC(…) …; /* camera instance counter */ static atomic_t camera_instance = …; /* global device data array */ static struct bcm2835_mmal_dev *gdev[MAX_BCM2835_CAMERAS]; #define FPS_MIN … #define FPS_MAX … /* timeperframe: min/max and default */ static const struct v4l2_fract tpf_min = …, tpf_max = …, tpf_default = …; /* Container for MMAL and VB2 buffers*/ struct vb2_mmal_buffer { … }; /* video formats */ static struct mmal_fmt formats[] = …; static struct mmal_fmt *get_format(struct v4l2_format *f) { … } /* ------------------------------------------------------------------ * Videobuf queue operations * ------------------------------------------------------------------ */ static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_ctxs[]) { … } static int buffer_init(struct vb2_buffer *vb) { … } static int buffer_prepare(struct vb2_buffer *vb) { … } static void buffer_cleanup(struct vb2_buffer *vb) { … } static inline bool is_capturing(struct bcm2835_mmal_dev *dev) { … } static void buffer_cb(struct vchiq_mmal_instance *instance, struct vchiq_mmal_port *port, int status, struct mmal_buffer *mmal_buf) { … } static int enable_camera(struct bcm2835_mmal_dev *dev) { … } static int disable_camera(struct bcm2835_mmal_dev *dev) { … } static void buffer_queue(struct vb2_buffer *vb) { … } static int start_streaming(struct vb2_queue *vq, unsigned int count) { … } /* abort streaming and wait for last buffer */ static void stop_streaming(struct vb2_queue *vq) { … } static const struct vb2_ops bcm2835_mmal_video_qops = …; /* ------------------------------------------------------------------ * IOCTL operations * ------------------------------------------------------------------ */ static int set_overlay_params(struct bcm2835_mmal_dev *dev, struct vchiq_mmal_port *port) { … } /* overlay ioctl */ static int vidioc_enum_fmt_vid_overlay(struct file *file, void *priv, struct v4l2_fmtdesc *f) { … } static int vidioc_g_fmt_vid_overlay(struct file *file, void *priv, struct v4l2_format *f) { … } static int vidioc_try_fmt_vid_overlay(struct file *file, void *priv, struct v4l2_format *f) { … } static int vidioc_s_fmt_vid_overlay(struct file *file, void *priv, struct v4l2_format *f) { … } static int vidioc_overlay(struct file *file, void *f, unsigned int on) { … } static int vidioc_g_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *a) { … } /* input ioctls */ static int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *inp) { … } static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) { … } static int vidioc_s_input(struct file *file, void *priv, unsigned int i) { … } /* capture ioctls */ static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap) { … } static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fmtdesc *f) { … } static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static int mmal_setup_video_component(struct bcm2835_mmal_dev *dev, struct v4l2_format *f) { … } static int mmal_setup_encode_component(struct bcm2835_mmal_dev *dev, struct v4l2_format *f, struct vchiq_mmal_port *port, struct vchiq_mmal_port *camera_port, struct vchiq_mmal_component *component) { … } static int mmal_setup_components(struct bcm2835_mmal_dev *dev, struct v4l2_format *f) { … } static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static int vidioc_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { … } /* timeperframe is arbitrary and continuous */ static int vidioc_enum_frameintervals(struct file *file, void *priv, struct v4l2_frmivalenum *fival) { … } static int vidioc_g_parm(struct file *file, void *priv, struct v4l2_streamparm *parm) { … } static int vidioc_s_parm(struct file *file, void *priv, struct v4l2_streamparm *parm) { … } static const struct v4l2_ioctl_ops camera0_ioctl_ops = …; /* ------------------------------------------------------------------ * Driver init/finalise * ------------------------------------------------------------------ */ static const struct v4l2_file_operations camera0_fops = …; static const struct video_device vdev_template = …; /* Returns the number of cameras, and also the max resolution supported * by those cameras. */ static int get_num_cameras(struct vchiq_mmal_instance *instance, unsigned int resolutions[][2], int num_resolutions) { … } static int set_camera_parameters(struct vchiq_mmal_instance *instance, struct vchiq_mmal_component *camera, struct bcm2835_mmal_dev *dev) { … } #define MAX_SUPPORTED_ENCODINGS … /* MMAL instance and component init */ static int mmal_init(struct bcm2835_mmal_dev *dev) { … } static int bcm2835_mmal_init_device(struct bcm2835_mmal_dev *dev, struct video_device *vfd) { … } static void bcm2835_cleanup_instance(struct bcm2835_mmal_dev *dev) { … } static struct v4l2_format default_v4l2_format = …; static int bcm2835_mmal_probe(struct vchiq_device *device) { … } static void bcm2835_mmal_remove(struct vchiq_device *device) { … } static const struct vchiq_device_id device_id_table[] = …; MODULE_DEVICE_TABLE(vchiq, device_id_table); static struct vchiq_driver bcm2835_camera_driver = …; module_vchiq_driver(…) MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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