mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 21:36:42 +07:00
2902fb7e0c
Many people are trying to use stk1160 on low memory devices. Instead of failing if one allocation fails, we allow the driver to continue working if fewer transfer buffers are available. Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
211 lines
5.3 KiB
C
211 lines
5.3 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* 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; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/i2c.h>
|
|
#include <sound/core.h>
|
|
#include <sound/ac97_codec.h>
|
|
#include <media/videobuf2-core.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-ctrls.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_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.
|
|
*
|
|
*/
|
|
#define DEBUG
|
|
#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_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_isoc_ctl {
|
|
/* max packet size of isoc transaction */
|
|
int max_pkt_size;
|
|
|
|
/* number of allocated urbs */
|
|
int num_bufs;
|
|
|
|
/* urb for isoc transfers */
|
|
struct urb **urb;
|
|
|
|
/* transfer buffers for isoc transfer */
|
|
char **transfer_buffer;
|
|
|
|
/* current buffer */
|
|
struct stk1160_buffer *buf;
|
|
};
|
|
|
|
struct stk1160_fmt {
|
|
char *name;
|
|
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;
|
|
char urb_buf[255]; /* urb control msg buffer */
|
|
|
|
/* 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 field_count; /* not sure ??? */
|
|
enum v4l2_field field; /* also not sure :/ */
|
|
|
|
/* 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);
|
|
|
|
/* 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 */
|
|
#ifdef CONFIG_VIDEO_STK1160_AC97
|
|
int stk1160_ac97_register(struct stk1160 *dev);
|
|
int stk1160_ac97_unregister(struct stk1160 *dev);
|
|
#else
|
|
static inline int stk1160_ac97_register(struct stk1160 *dev) { return 0; }
|
|
static inline int stk1160_ac97_unregister(struct stk1160 *dev) { return 0; }
|
|
#endif
|
|
|