diff options
Diffstat (limited to 'drivers/media/usb/gspca/gspca.h')
| -rw-r--r-- | drivers/media/usb/gspca/gspca.h | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/gspca.h b/drivers/media/usb/gspca/gspca.h new file mode 100644 index 0000000000..a6554d5e9e --- /dev/null +++ b/drivers/media/usb/gspca/gspca.h @@ -0,0 +1,243 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef GSPCAV2_H +#define GSPCAV2_H + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/videobuf2-v4l2.h> +#include <media/videobuf2-vmalloc.h> +#include <linux/mutex.h> + + + +/* GSPCA debug codes */ + +#define D_PROBE 1 +#define D_CONF 2 +#define D_STREAM 3 +#define D_FRAM 4 +#define D_PACK 5 +#define D_USBI 6 +#define D_USBO 7 + +extern int gspca_debug; + + +#define gspca_dbg(gspca_dev, level, fmt, ...) \ + v4l2_dbg(level, gspca_debug, &(gspca_dev)->v4l2_dev, \ + fmt, ##__VA_ARGS__) + +#define gspca_err(gspca_dev, fmt, ...) \ + v4l2_err(&(gspca_dev)->v4l2_dev, fmt, ##__VA_ARGS__) + +#define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */ +/* image transfers */ +#define MAX_NURBS 4 /* max number of URBs */ + + +/* used to list framerates supported by a camera mode (resolution) */ +struct framerates { + const u8 *rates; + int nrates; +}; + +/* device information - set at probe time */ +struct cam { + const struct v4l2_pix_format *cam_mode; /* size nmodes */ + const struct framerates *mode_framerates; /* must have size nmodes, + * just like cam_mode */ + u32 bulk_size; /* buffer size when image transfer by bulk */ + u32 input_flags; /* value for ENUM_INPUT status flags */ + u8 nmodes; /* size of cam_mode */ + u8 no_urb_create; /* don't create transfer URBs */ + u8 bulk_nurbs; /* number of URBs in bulk mode + * - cannot be > MAX_NURBS + * - when 0 and bulk_size != 0 means + * 1 URB and submit done by subdriver */ + u8 bulk; /* image transfer by 0:isoc / 1:bulk */ + u8 npkt; /* number of packets in an ISOC message + * 0 is the default value: 32 packets */ + u8 needs_full_bandwidth;/* Set this flag to notify the bandwidth calc. + * code that the cam fills all image buffers to + * the max, even when using compression. */ +}; + +struct gspca_dev; +struct gspca_frame; + +/* subdriver operations */ +typedef int (*cam_op) (struct gspca_dev *); +typedef void (*cam_v_op) (struct gspca_dev *); +typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *); +typedef int (*cam_get_jpg_op) (struct gspca_dev *, + struct v4l2_jpegcompression *); +typedef int (*cam_set_jpg_op) (struct gspca_dev *, + const struct v4l2_jpegcompression *); +typedef int (*cam_get_reg_op) (struct gspca_dev *, + struct v4l2_dbg_register *); +typedef int (*cam_set_reg_op) (struct gspca_dev *, + const struct v4l2_dbg_register *); +typedef int (*cam_chip_info_op) (struct gspca_dev *, + struct v4l2_dbg_chip_info *); +typedef void (*cam_streamparm_op) (struct gspca_dev *, + struct v4l2_streamparm *); +typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev, + u8 *data, + int len); +typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev, + u8 *data, + int len); +typedef void (*cam_format_op) (struct gspca_dev *gspca_dev, + struct v4l2_format *fmt); +typedef int (*cam_frmsize_op) (struct gspca_dev *gspca_dev, + struct v4l2_frmsizeenum *fsize); + +/* subdriver description */ +struct sd_desc { +/* information */ + const char *name; /* sub-driver name */ +/* mandatory operations */ + cam_cf_op config; /* called on probe */ + cam_op init; /* called on probe and resume */ + cam_op init_controls; /* called on probe */ + cam_v_op probe_error; /* called if probe failed, do cleanup here */ + cam_op start; /* called on stream on after URBs creation */ + cam_pkt_op pkt_scan; +/* optional operations */ + cam_op isoc_init; /* called on stream on before getting the EP */ + cam_op isoc_nego; /* called when URB submit failed with NOSPC */ + cam_v_op stopN; /* called on stream off - main alt */ + cam_v_op stop0; /* called on stream off & disconnect - alt 0 */ + cam_v_op dq_callback; /* called when a frame has been dequeued */ + cam_get_jpg_op get_jcomp; + cam_set_jpg_op set_jcomp; + cam_streamparm_op get_streamparm; + cam_streamparm_op set_streamparm; + cam_format_op try_fmt; + cam_frmsize_op enum_framesizes; +#ifdef CONFIG_VIDEO_ADV_DEBUG + cam_set_reg_op set_register; + cam_get_reg_op get_register; + cam_chip_info_op get_chip_info; +#endif +#if IS_ENABLED(CONFIG_INPUT) + cam_int_pkt_op int_pkt_scan; + /* other_input makes the gspca core create gspca_dev->input even when + int_pkt_scan is NULL, for cams with non interrupt driven buttons */ + u8 other_input; +#endif +}; + +/* packet types when moving from iso buf to frame buf */ +enum gspca_packet_type { + DISCARD_PACKET, + FIRST_PACKET, + INTER_PACKET, + LAST_PACKET +}; + +struct gspca_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; +}; + +static inline struct gspca_buffer *to_gspca_buffer(struct vb2_buffer *vb2) +{ + return container_of(vb2, struct gspca_buffer, vb.vb2_buf); +} + +struct gspca_dev { + struct video_device vdev; /* !! must be the first item */ + struct module *module; /* subdriver handling the device */ + struct v4l2_device v4l2_dev; + struct usb_device *dev; + +#if IS_ENABLED(CONFIG_INPUT) + struct input_dev *input_dev; + char phys[64]; /* physical device path */ +#endif + + struct cam cam; /* device information */ + const struct sd_desc *sd_desc; /* subdriver description */ + struct v4l2_ctrl_handler ctrl_handler; + + /* autogain and exposure or gain control cluster, these are global as + the autogain/exposure functions in autogain_functions.c use them */ + struct { + struct v4l2_ctrl *autogain; + struct v4l2_ctrl *exposure; + struct v4l2_ctrl *gain; + int exp_too_low_cnt, exp_too_high_cnt; + }; + +#define USB_BUF_SZ 64 + __u8 *usb_buf; /* buffer for USB exchanges */ + struct urb *urb[MAX_NURBS]; +#if IS_ENABLED(CONFIG_INPUT) + struct urb *int_urb; +#endif + + u8 *image; /* image being filled */ + u32 image_len; /* current length of image */ + __u8 last_packet_type; + __s8 empty_packet; /* if (-1) don't check empty packets */ + bool streaming; + + __u8 curr_mode; /* current camera mode */ + struct v4l2_pix_format pixfmt; /* current mode parameters */ + __u32 sequence; /* frame sequence number */ + + struct vb2_queue queue; + + spinlock_t qlock; + struct list_head buf_list; + + wait_queue_head_t wq; /* wait queue */ + struct mutex usb_lock; /* usb exchange protection */ + int usb_err; /* USB error - protected by usb_lock */ + u16 pkt_size; /* ISOC packet size */ +#ifdef CONFIG_PM + char frozen; /* suspend - resume */ +#endif + bool present; + char memory; /* memory type (V4L2_MEMORY_xxx) */ + __u8 iface; /* USB interface number */ + __u8 alt; /* USB alternate setting */ + int xfer_ep; /* USB transfer endpoint address */ + u8 audio; /* presence of audio device */ + + /* (*) These variables are proteced by both usb_lock and queue_lock, + that is any code setting them is holding *both*, which means that + any code getting them needs to hold at least one of them */ +}; + +int gspca_dev_probe(struct usb_interface *intf, + const struct usb_device_id *id, + const struct sd_desc *sd_desc, + int dev_size, + struct module *module); +int gspca_dev_probe2(struct usb_interface *intf, + const struct usb_device_id *id, + const struct sd_desc *sd_desc, + int dev_size, + struct module *module); +void gspca_disconnect(struct usb_interface *intf); +void gspca_frame_add(struct gspca_dev *gspca_dev, + enum gspca_packet_type packet_type, + const u8 *data, + int len); +#ifdef CONFIG_PM +int gspca_suspend(struct usb_interface *intf, pm_message_t message); +int gspca_resume(struct usb_interface *intf); +#endif +int gspca_expo_autogain(struct gspca_dev *gspca_dev, int avg_lum, + int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee); +int gspca_coarse_grained_expo_autogain(struct gspca_dev *gspca_dev, + int avg_lum, int desired_avg_lum, int deadzone); + +#endif /* GSPCAV2_H */ |