brintos

brintos / linux-shallow public Read only

0
0
Text · 4.7 KiB · 7b498d1 Raw
203 lines · c
1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * STK1160 driver4 *5 * Copyright (C) 2012 Ezequiel Garcia6 * <elezegarcia--a.t--gmail.com>7 *8 * Based on Easycap driver by R.M. Thomas9 *	Copyright (C) 2010 R.M. Thomas10 *	<rmthomas--a.t--sciolus.org>11 */12 13#include <linux/i2c.h>14#include <sound/core.h>15#include <sound/ac97_codec.h>16#include <media/videobuf2-v4l2.h>17#include <media/v4l2-device.h>18#include <media/v4l2-ctrls.h>19#include <linux/usb.h>20#include <linux/usb/hcd.h>21 22#define STK1160_VERSION		"0.9.5"23#define STK1160_VERSION_NUM	0x00090524 25/* Decide on number of packets for each buffer */26#define STK1160_NUM_PACKETS 6427 28/* Number of buffers for isoc transfers */29#define STK1160_NUM_BUFS 1630#define STK1160_MIN_BUFS 131 32/* TODO: This endpoint address should be retrieved */33#define STK1160_EP_VIDEO 0x8234#define STK1160_EP_AUDIO 0x8135 36/* Max and min video buffers */37#define STK1160_MIN_VIDEO_BUFFERS 838#define STK1160_MAX_VIDEO_BUFFERS 3239 40#define STK1160_MIN_PKT_SIZE 307241 42#define STK1160_MAX_INPUT 443#define STK1160_SVIDEO_INPUT 444 45#define STK1160_AC97_TIMEOUT 5046 47#define STK1160_I2C_TIMEOUT 10048 49/* TODO: Print helpers50 * I could use dev_xxx, pr_xxx, v4l2_xxx or printk.51 * However, there isn't a solid consensus on which52 * new drivers should use.53 *54 */55#ifdef DEBUG56#define stk1160_dbg(fmt, args...) \57	printk(KERN_DEBUG "stk1160: " fmt,  ## args)58#else59#define stk1160_dbg(fmt, args...)60#endif61 62#define stk1160_info(fmt, args...) \63	pr_info("stk1160: " fmt, ## args)64 65#define stk1160_warn(fmt, args...) \66	pr_warn("stk1160: " fmt, ## args)67 68#define stk1160_err(fmt, args...) \69	pr_err("stk1160: " fmt, ## args)70 71/* Buffer for one video frame */72struct stk1160_buffer {73	/* common v4l buffer stuff -- must be first */74	struct vb2_v4l2_buffer vb;75	struct list_head list;76 77	void *mem;78	unsigned int length;		/* buffer length */79	unsigned int bytesused;		/* bytes written */80	int odd;			/* current oddity */81 82	/*83	 * Since we interlace two fields per frame,84	 * this is different from bytesused.85	 */86	unsigned int pos;		/* current pos inside buffer */87};88 89struct stk1160_urb {90	struct urb *urb;91	char *transfer_buffer;92	struct sg_table *sgt;93	struct stk1160 *dev;94	dma_addr_t dma;95};96 97struct stk1160_isoc_ctl {98	/* max packet size of isoc transaction */99	int max_pkt_size;100 101	/* number of allocated urbs */102	int num_bufs;103 104	struct stk1160_urb urb_ctl[STK1160_NUM_BUFS];105 106	/* current buffer */107	struct stk1160_buffer *buf;108};109 110struct stk1160_fmt {111	u32   fourcc;          /* v4l2 format id */112	int   depth;113};114 115struct stk1160 {116	struct v4l2_device v4l2_dev;117	struct video_device vdev;118	struct v4l2_ctrl_handler ctrl_handler;119 120	struct device *dev;121	struct usb_device *udev;122 123	/* saa7115 subdev */124	struct v4l2_subdev *sd_saa7115;125 126	/* isoc control struct */127	struct list_head avail_bufs;128 129	/* video capture */130	struct vb2_queue vb_vidq;131 132	/* max packet size of isoc transaction */133	int max_pkt_size;134	/* array of wMaxPacketSize */135	unsigned int *alt_max_pkt_size;136	/* alternate */137	int alt;138	/* Number of alternative settings */139	int num_alt;140 141	struct stk1160_isoc_ctl isoc_ctl;142 143	/* frame properties */144	int width;		  /* current frame width */145	int height;		  /* current frame height */146	unsigned int ctl_input;	  /* selected input */147	v4l2_std_id norm;	  /* current norm */148	struct stk1160_fmt *fmt;  /* selected format */149 150	unsigned int sequence;151 152	/* i2c i/o */153	struct i2c_adapter i2c_adap;154	struct i2c_client i2c_client;155 156	struct mutex v4l_lock;157	struct mutex vb_queue_lock;158	spinlock_t buf_lock;159 160	struct file *fh_owner;	/* filehandle ownership */161 162	/* EXPERIMENTAL */163	struct snd_card *snd_card;164};165 166struct regval {167	u16 reg;168	u16 val;169};170 171/* Provided by stk1160-v4l.c */172int stk1160_vb2_setup(struct stk1160 *dev);173int stk1160_video_register(struct stk1160 *dev);174void stk1160_video_unregister(struct stk1160 *dev);175void stk1160_clear_queue(struct stk1160 *dev, enum vb2_buffer_state vb2_state);176 177/* Provided by stk1160-video.c */178int stk1160_alloc_isoc(struct stk1160 *dev);179void stk1160_free_isoc(struct stk1160 *dev);180void stk1160_cancel_isoc(struct stk1160 *dev);181void stk1160_uninit_isoc(struct stk1160 *dev);182 183/* Provided by stk1160-i2c.c */184int stk1160_i2c_register(struct stk1160 *dev);185int stk1160_i2c_unregister(struct stk1160 *dev);186 187/* Provided by stk1160-core.c */188int stk1160_read_reg(struct stk1160 *dev, u16 reg, u8 *value);189int stk1160_write_reg(struct stk1160 *dev, u16 reg, u16 value);190int stk1160_write_regs_req(struct stk1160 *dev, u8 req, u16 reg,191		char *buf, int len);192int stk1160_read_reg_req_len(struct stk1160 *dev, u8 req, u16 reg,193		char *buf, int len);194void stk1160_select_input(struct stk1160 *dev);195 196/* Provided by stk1160-ac97.c */197void stk1160_ac97_setup(struct stk1160 *dev);198 199static inline struct device *stk1160_get_dmadev(struct stk1160 *dev)200{201	return bus_to_hcd(dev->udev->bus)->self.sysdev;202}203