// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for the Conexant CX23885 PCIe bridge * * Copyright (c) 2007 Steven Toth <[email protected]> */ #include "cx23885.h" #include "cx23885-video.h" #include <linux/init.h> #include <linux/list.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kmod.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/kthread.h> #include <asm/div64.h> #include <media/v4l2-common.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-event.h> #include "cx23885-ioctl.h" #include "xc2028.h" #include <media/drv-intf/cx25840.h> MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; /* ------------------------------------------------------------------ */ static unsigned int video_nr[] = …; static unsigned int vbi_nr[] = …; module_param_array(…); module_param_array(…); MODULE_PARM_DESC(…) …; MODULE_PARM_DESC(…) …; static unsigned int video_debug; module_param(video_debug, int, 0644); MODULE_PARM_DESC(…) …; static unsigned int irq_debug; module_param(irq_debug, int, 0644); MODULE_PARM_DESC(…) …; static unsigned int vid_limit = …; module_param(vid_limit, int, 0644); MODULE_PARM_DESC(…) …; #define dprintk(level, fmt, arg...) … /* ------------------------------------------------------------------- */ /* static data */ #define FORMAT_FLAGS_PACKED … static struct cx23885_fmt formats[] = …; static struct cx23885_fmt *format_by_fourcc(unsigned int fourcc) { … } /* ------------------------------------------------------------------- */ void cx23885_video_wakeup(struct cx23885_dev *dev, struct cx23885_dmaqueue *q, u32 count) { … } int cx23885_set_tvnorm(struct cx23885_dev *dev, v4l2_std_id norm) { … } static struct video_device *cx23885_vdev_init(struct cx23885_dev *dev, struct pci_dev *pci, struct video_device *template, char *type) { … } int cx23885_flatiron_write(struct cx23885_dev *dev, u8 reg, u8 data) { … } u8 cx23885_flatiron_read(struct cx23885_dev *dev, u8 reg) { … } static void cx23885_flatiron_dump(struct cx23885_dev *dev) { … } static int cx23885_flatiron_mux(struct cx23885_dev *dev, int input) { … } static int cx23885_video_mux(struct cx23885_dev *dev, unsigned int input) { … } static int cx23885_audio_mux(struct cx23885_dev *dev, unsigned int input) { … } /* ------------------------------------------------------------------ */ static int cx23885_start_video_dma(struct cx23885_dev *dev, struct cx23885_dmaqueue *q, struct cx23885_buffer *buf) { … } static int queue_setup(struct vb2_queue *q, unsigned int *num_buffers, unsigned int *num_planes, unsigned int sizes[], struct device *alloc_devs[]) { … } static int buffer_prepare(struct vb2_buffer *vb) { … } static void buffer_finish(struct vb2_buffer *vb) { … } /* * The risc program for each buffer works as follows: it starts with a simple * 'JUMP to addr + 12', which is effectively a NOP. Then the code to DMA the * buffer follows and at the end we have a JUMP back to the start + 12 (skipping * the initial JUMP). * * This is the risc program of the first buffer to be queued if the active list * is empty and it just keeps DMAing this buffer without generating any * interrupts. * * If a new buffer is added then the initial JUMP in the code for that buffer * will generate an interrupt which signals that the previous buffer has been * DMAed successfully and that it can be returned to userspace. * * It also sets the final jump of the previous buffer to the start of the new * buffer, thus chaining the new buffer into the DMA chain. This is a single * atomic u32 write, so there is no race condition. * * The end-result of all this that you only get an interrupt when a buffer * is ready, so the control flow is very easy. */ static void buffer_queue(struct vb2_buffer *vb) { … } static int cx23885_start_streaming(struct vb2_queue *q, unsigned int count) { … } static void cx23885_stop_streaming(struct vb2_queue *q) { … } static const struct vb2_ops cx23885_video_qops = …; /* ------------------------------------------------------------------ */ /* VIDEO IOCTLS */ 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 vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } 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_pixelaspect(struct file *file, void *priv, int type, struct v4l2_fract *f) { … } static int vidioc_g_selection(struct file *file, void *fh, struct v4l2_selection *sel) { … } static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id) { … } static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id tvnorms) { … } int cx23885_enum_input(struct cx23885_dev *dev, struct v4l2_input *i) { … } static int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *i) { … } int cx23885_get_input(struct file *file, void *priv, unsigned int *i) { … } static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) { … } int cx23885_set_input(struct file *file, void *priv, unsigned int i) { … } static int vidioc_s_input(struct file *file, void *priv, unsigned int i) { … } static int vidioc_log_status(struct file *file, void *priv) { … } static int cx23885_query_audinput(struct file *file, void *priv, struct v4l2_audio *i) { … } static int vidioc_enum_audinput(struct file *file, void *priv, struct v4l2_audio *i) { … } static int vidioc_g_audinput(struct file *file, void *priv, struct v4l2_audio *i) { … } static int vidioc_s_audinput(struct file *file, void *priv, const struct v4l2_audio *i) { … } static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t) { … } static int vidioc_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t) { … } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { … } static int cx23885_set_freq(struct cx23885_dev *dev, const struct v4l2_frequency *f) { … } static int cx23885_set_freq_via_ops(struct cx23885_dev *dev, const struct v4l2_frequency *f) { … } int cx23885_set_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { … } static int vidioc_s_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { … } /* ----------------------------------------------------------- */ int cx23885_video_irq(struct cx23885_dev *dev, u32 status) { … } /* ----------------------------------------------------------- */ /* exported stuff */ static const struct v4l2_file_operations video_fops = …; static const struct v4l2_ioctl_ops video_ioctl_ops = …; static struct video_device cx23885_vbi_template; static struct video_device cx23885_video_template = …; void cx23885_video_unregister(struct cx23885_dev *dev) { … } int cx23885_video_register(struct cx23885_dev *dev) { … }
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