/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* STK1160 driver
*
* Copyright (C) 2012 Ezequiel Garcia
* <elezegarcia--a.t--gmail.com>
*
* Based on Easycap driver by R.M. Thomas
* Copyright (C) 2010 R.M. Thomas
* <rmthomas--a.t--sciolus.org>
*/
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/ac97_codec.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#define STK1160_VERSION "0.9.5"
#define STK1160_VERSION_NUM 0x000905
/* Decide on number of packets for each buffer */
#define STK1160_NUM_PACKETS 64
/* Number of buffers for isoc transfers */
#define STK1160_NUM_BUFS 16
#define STK1160_MIN_BUFS 1
/* TODO: This endpoint address should be retrieved */
#define STK1160_EP_VIDEO 0x82
#define STK1160_EP_AUDIO 0x81
/* Max and min video buffers */
#define STK1160_MIN_VIDEO_BUFFERS 8
#define STK1160_MAX_VIDEO_BUFFERS 32
#define STK1160_MIN_PKT_SIZE 3072
#define STK1160_MAX_INPUT 4
#define STK1160_SVIDEO_INPUT 4
#define STK1160_AC97_TIMEOUT 50
#define STK1160_I2C_TIMEOUT 100
/* TODO: Print helpers
* I could use dev_xxx, pr_xxx, v4l2_xxx or printk.
* However, there isn't a solid consensus on which
* new drivers should use.
*
*/
#ifdef DEBUG
#define stk1160_dbg(fmt, args...) \
printk(KERN_DEBUG "stk1160: " fmt, ## args)
#else
#define stk1160_dbg(fmt, args...)
#endif
#define stk1160_info(fmt, args...) \
pr_info("stk1160: " fmt, ## args)
#define stk1160_warn(fmt, args...) \
pr_warn("stk1160: " fmt, ## args)
#define stk1160_err(fmt, args...) \
pr_err("stk1160: " fmt, ## args)
/* Buffer for one video frame */
struct stk1160_buffer {
/* common v4l buffer stuff -- must be first */
struct vb2_v4l2_buffer vb;
struct list_head list;
void *mem;
unsigned int length; /* buffer length */
unsigned int bytesused; /* bytes written */
int odd; /* current oddity */
/*
* Since we interlace two fields per frame,
* this is different from bytesused.
*/
unsigned int pos; /* current pos inside buffer */
};
struct stk1160_urb {
struct urb *urb;
char *transfer_buffer;
struct sg_table *sgt;
struct stk1160 *dev;
dma_addr_t dma;
};
struct stk1160_isoc_ctl {
/* max packet size of isoc transaction */
int max_pkt_size;
/* number of allocated urbs */
int num_bufs;
struct stk1160_urb urb_ctl[STK1160_NUM_BUFS];
/* current buffer */
struct stk1160_buffer *buf;
};
struct stk1160_fmt {
u32 fourcc; /* v4l2 format id */
int depth;
};
struct stk1160 {
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct v4l2_ctrl_handler ctrl_handler;
struct device *dev;
struct usb_device *udev;
/* saa7115 subdev */
struct v4l2_subdev *sd_saa7115;
/* isoc control struct */
struct list_head avail_bufs;
/* video capture */
struct vb2_queue vb_vidq;
/* max packet size of isoc transaction */
int max_pkt_size;
/* array of wMaxPacketSize */
unsigned int *alt_max_pkt_size;
/* alternate */
int alt;
/* Number of alternative settings */
int num_alt;
struct stk1160_isoc_ctl isoc_ctl;
/* frame properties */
int width; /* current frame width */
int height; /* current frame height */
unsigned int ctl_input; /* selected input */
v4l2_std_id norm; /* current norm */
struct stk1160_fmt *fmt; /* selected format */
unsigned int sequence;
/* i2c i/o */
struct i2c_adapter i2c_adap;
struct i2c_client i2c_client;
struct mutex v4l_lock;
struct mutex vb_queue_lock;
spinlock_t buf_lock;
struct file *fh_owner; /* filehandle ownership */
/* EXPERIMENTAL */
struct snd_card *snd_card;
};
struct regval {
u16 reg;
u16 val;
};
/* Provided by stk1160-v4l.c */
int stk1160_vb2_setup(struct stk1160 *dev);
int stk1160_video_register(struct stk1160 *dev);
void stk1160_video_unregister(struct stk1160 *dev);
void stk1160_clear_queue(struct stk1160 *dev, enum vb2_buffer_state vb2_state);
/* Provided by stk1160-video.c */
int stk1160_alloc_isoc(struct stk1160 *dev);
void stk1160_free_isoc(struct stk1160 *dev);
void stk1160_cancel_isoc(struct stk1160 *dev);
void stk1160_uninit_isoc(struct stk1160 *dev);
/* Provided by stk1160-i2c.c */
int stk1160_i2c_register(struct stk1160 *dev);
int stk1160_i2c_unregister(struct stk1160 *dev);
/* Provided by stk1160-core.c */
int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value);
int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value);
int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg,
char *buf, int len);
int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg,
char *buf, int len);
void stk1160_select_input(struct stk1160 *dev);
/* Provided by stk1160-ac97.c */
void stk1160_ac97_setup(struct stk1160 *dev);
static inline struct device *stk1160_get_dmadev(struct stk1160 *dev)
{
return bus_to_hcd(dev->udev->bus)->self.sysdev;
}
Codebase Browser
linux