// SPDX-License-Identifier: GPL-2.0+ // // em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB // video capture devices // // Copyright (C) 2005 Ludovico Cavedon <[email protected]> // Markus Rechberger <[email protected]> // Mauro Carvalho Chehab <[email protected]> // Sascha Sommer <[email protected]> // Copyright (C) 2012 Frank Schäfer <[email protected]> // // Some parts based on SN9C10x PC Camera Controllers GPL driver made // by Luca Risolia <[email protected]> #include "em28xx.h" #include <linux/init.h> #include <linux/list.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/bitmap.h> #include <linux/usb.h> #include <linux/i2c.h> #include <linux/mm.h> #include <linux/mutex.h> #include <linux/slab.h> #include "em28xx-v4l.h" #include <media/v4l2-common.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-event.h> #include <media/drv-intf/msp3400.h> #include <media/tuner.h> #define DRIVER_AUTHOR … static unsigned int isoc_debug; module_param(isoc_debug, int, 0644); MODULE_PARM_DESC(…) …; static unsigned int disable_vbi; module_param(disable_vbi, int, 0644); MODULE_PARM_DESC(…) …; static int alt; module_param(alt, int, 0644); MODULE_PARM_DESC(…) …; #define em28xx_videodbg(fmt, arg...) … #define em28xx_isocdbg(fmt, arg...) … MODULE_AUTHOR(…); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_VERSION(…); #define EM25XX_FRMDATAHDR_BYTE1 … #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE … #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END … #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID … #define EM25XX_FRMDATAHDR_BYTE2_MASK … static unsigned int video_nr[] = …; static unsigned int vbi_nr[] = …; static unsigned int radio_nr[] = …; module_param_array(…); module_param_array(…); module_param_array(…); MODULE_PARM_DESC(…) …; MODULE_PARM_DESC(…) …; MODULE_PARM_DESC(…) …; static unsigned int video_debug; module_param(video_debug, int, 0644); MODULE_PARM_DESC(…) …; /* supported video standards */ static struct em28xx_fmt format[] = …; /*FIXME: maxw should be dependent of alt mode */ static inline unsigned int norm_maxw(struct em28xx *dev) { … } static inline unsigned int norm_maxh(struct em28xx *dev) { … } static int em28xx_vbi_supported(struct em28xx *dev) { … } /* * em28xx_wake_i2c() * configure i2c attached devices */ static void em28xx_wake_i2c(struct em28xx *dev) { … } static int em28xx_colorlevels_set_default(struct em28xx *dev) { … } static int em28xx_set_outfmt(struct em28xx *dev) { … } static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, u8 ymin, u8 ymax) { … } static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, u16 width, u16 height) { … } static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) { … } /* FIXME: this only function read values from dev */ static int em28xx_resolution_set(struct em28xx *dev) { … } /* Set USB alternate setting for analog video */ static int em28xx_set_alternate(struct em28xx *dev) { … } /* * DMA and thread functions */ /* * Finish the current buffer */ static inline void finish_buffer(struct em28xx *dev, struct em28xx_buffer *buf) { … } /* * Copy picture data from USB buffer to video buffer */ static void em28xx_copy_video(struct em28xx *dev, struct em28xx_buffer *buf, unsigned char *usb_buf, unsigned long len) { … } /* * Copy VBI data from USB buffer to video buffer */ static void em28xx_copy_vbi(struct em28xx *dev, struct em28xx_buffer *buf, unsigned char *usb_buf, unsigned long len) { … } static inline void print_err_status(struct em28xx *dev, int packet, int status) { … } /* * get the next available buffer from dma queue */ static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev, struct em28xx_dmaqueue *dma_q) { … } /* * Finish the current buffer if completed and prepare for the next field */ static struct em28xx_buffer * finish_field_prepare_next(struct em28xx *dev, struct em28xx_buffer *buf, struct em28xx_dmaqueue *dma_q) { … } /* * Process data packet according to the em2710/em2750/em28xx frame data format */ static inline void process_frame_data_em28xx(struct em28xx *dev, unsigned char *data_pkt, unsigned int data_len) { … } /* * Process data packet according to the em25xx/em276x/7x/8x frame data format */ static inline void process_frame_data_em25xx(struct em28xx *dev, unsigned char *data_pkt, unsigned int data_len) { … } /* Processes and copies the URB data content (video and VBI data) */ static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb) { … } static int get_resource(enum v4l2_buf_type f_type) { … } /* Usage lock check functions */ static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type) { … } static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) { … } static void em28xx_v4l2_media_release(struct em28xx *dev) { … } /* * Media Controller helper functions */ static int em28xx_enable_analog_tuner(struct em28xx *dev) { … } static const char * const iname[] = …; static void em28xx_v4l2_create_entities(struct em28xx *dev) { … } /* * Videobuf2 operations */ static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[]) { … } static int buffer_prepare(struct vb2_buffer *vb) { … } int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count) { … } static void em28xx_stop_streaming(struct vb2_queue *vq) { … } void em28xx_stop_vbi_streaming(struct vb2_queue *vq) { … } static void buffer_queue(struct vb2_buffer *vb) { … } static const struct vb2_ops em28xx_video_qops = …; static int em28xx_vb2_setup(struct em28xx *dev) { … } /* * v4l2 interface */ static void video_mux(struct em28xx *dev, int index) { … } static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv) { … } static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl) { … } static const struct v4l2_ctrl_ops em28xx_ctrl_ops = …; static void size_to_scale(struct em28xx *dev, unsigned int width, unsigned int height, unsigned int *hscale, unsigned int *vscale) { … } static void scale_to_size(struct em28xx *dev, unsigned int hscale, unsigned int vscale, unsigned int *width, unsigned int *height) { … } /* * IOCTL vidioc handling */ static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) { … } static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, unsigned int width, unsigned int height) { … } static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { … } static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) { … } static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) { … } static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) { … } static int vidioc_g_parm(struct file *file, void *priv, struct v4l2_streamparm *p) { … } static int vidioc_s_parm(struct file *file, void *priv, struct v4l2_streamparm *p) { … } static int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *i) { … } 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) { … } static int em28xx_fill_audio_input(struct em28xx *dev, const char *s, struct v4l2_audio *a, unsigned int index) { … } static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a) { … } static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) { … } static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a) { … } 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 vidioc_s_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { … } #ifdef CONFIG_VIDEO_ADV_DEBUG static int vidioc_g_chip_info(struct file *file, void *priv, struct v4l2_dbg_chip_info *chip) { … } static int em28xx_reg_len(int reg) { … } static int vidioc_g_register(struct file *file, void *priv, struct v4l2_dbg_register *reg) { … } static int vidioc_s_register(struct file *file, void *priv, const struct v4l2_dbg_register *reg) { … } #endif 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_enum_framesizes(struct file *file, void *priv, struct v4l2_frmsizeenum *fsize) { … } /* RAW VBI ioctls */ static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, struct v4l2_format *format) { … } /* * RADIO ESPECIFIC IOCTLS */ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t) { … } static int radio_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *t) { … } /* * em28xx_free_v4l2() - Free struct em28xx_v4l2 * * @ref: struct kref for struct em28xx_v4l2 * * Called when all users of struct em28xx_v4l2 are gone */ static void em28xx_free_v4l2(struct kref *ref) { … } /* * em28xx_v4l2_open() * inits the device and starts isoc transfer */ static int em28xx_v4l2_open(struct file *filp) { … } /* * em28xx_v4l2_fini() * unregisters the v4l2,i2c and usb devices * called when the device gets disconnected or at module unload */ static int em28xx_v4l2_fini(struct em28xx *dev) { … } static int em28xx_v4l2_suspend(struct em28xx *dev) { … } static int em28xx_v4l2_resume(struct em28xx *dev) { … } /* * em28xx_v4l2_close() * stops streaming and deallocates all resources allocated by the v4l2 * calls and ioctls */ static int em28xx_v4l2_close(struct file *filp) { … } static const struct v4l2_file_operations em28xx_v4l_fops = …; static const struct v4l2_ioctl_ops video_ioctl_ops = …; static const struct video_device em28xx_video_template = …; static const struct v4l2_file_operations radio_fops = …; static const struct v4l2_ioctl_ops radio_ioctl_ops = …; static struct video_device em28xx_radio_template = …; /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ static unsigned short saa711x_addrs[] = …; static unsigned short tvp5150_addrs[] = …; static unsigned short msp3400_addrs[] = …; /******************************** usb interface ******************************/ static void em28xx_vdev_init(struct em28xx *dev, struct video_device *vfd, const struct video_device *template, const char *type_name) { … } static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr) { … } static int em28xx_v4l2_init(struct em28xx *dev) { … } static struct em28xx_ops v4l2_ops = …; static int __init em28xx_video_register(void) { … } static void __exit em28xx_video_unregister(void) { … } module_init(…) …; module_exit(em28xx_video_unregister);
Codebase Browser
linux