diff options
Diffstat (limited to 'drivers/media/usb/stk1160/stk1160.h')
| -rw-r--r-- | drivers/media/usb/stk1160/stk1160.h | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/drivers/media/usb/stk1160/stk1160.h b/drivers/media/usb/stk1160/stk1160.h new file mode 100644 index 0000000000..7b498d14ed --- /dev/null +++ b/drivers/media/usb/stk1160/stk1160.h @@ -0,0 +1,202 @@ +/* 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; +} |