1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/module.h>
6 #include <linux/kernel.h>
8 #include <linux/videodev2.h>
9 #include <media/v4l2-common.h>
10 #include <media/v4l2-ctrls.h>
11 #include <media/v4l2-device.h>
12 #include <media/videobuf2-v4l2.h>
13 #include <media/videobuf2-vmalloc.h>
14 #include <linux/mutex.h>
18 /* GSPCA debug codes */
28 extern int gspca_debug;
31 #define gspca_dbg(gspca_dev, level, fmt, ...) \
32 v4l2_dbg(level, gspca_debug, &(gspca_dev)->v4l2_dev, \
35 #define gspca_err(gspca_dev, fmt, ...) \
36 v4l2_err(&(gspca_dev)->v4l2_dev, fmt, ##__VA_ARGS__)
38 #define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */
40 #define MAX_NURBS 4 /* max number of URBs */
43 /* used to list framerates supported by a camera mode (resolution) */
49 /* device information - set at probe time */
51 const struct v4l2_pix_format *cam_mode; /* size nmodes */
52 const struct framerates *mode_framerates; /* must have size nmodes,
53 * just like cam_mode */
54 u32 bulk_size; /* buffer size when image transfer by bulk */
55 u32 input_flags; /* value for ENUM_INPUT status flags */
56 u8 nmodes; /* size of cam_mode */
57 u8 no_urb_create; /* don't create transfer URBs */
58 u8 bulk_nurbs; /* number of URBs in bulk mode
59 * - cannot be > MAX_NURBS
60 * - when 0 and bulk_size != 0 means
61 * 1 URB and submit done by subdriver */
62 u8 bulk; /* image transfer by 0:isoc / 1:bulk */
63 u8 npkt; /* number of packets in an ISOC message
64 * 0 is the default value: 32 packets */
65 u8 needs_full_bandwidth;/* Set this flag to notify the bandwidth calc.
66 * code that the cam fills all image buffers to
67 * the max, even when using compression. */
73 /* subdriver operations */
74 typedef int (*cam_op) (struct gspca_dev *);
75 typedef void (*cam_v_op) (struct gspca_dev *);
76 typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
77 typedef int (*cam_get_jpg_op) (struct gspca_dev *,
78 struct v4l2_jpegcompression *);
79 typedef int (*cam_set_jpg_op) (struct gspca_dev *,
80 const struct v4l2_jpegcompression *);
81 typedef int (*cam_get_reg_op) (struct gspca_dev *,
82 struct v4l2_dbg_register *);
83 typedef int (*cam_set_reg_op) (struct gspca_dev *,
84 const struct v4l2_dbg_register *);
85 typedef int (*cam_chip_info_op) (struct gspca_dev *,
86 struct v4l2_dbg_chip_info *);
87 typedef void (*cam_streamparm_op) (struct gspca_dev *,
88 struct v4l2_streamparm *);
89 typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
92 typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
95 typedef void (*cam_format_op) (struct gspca_dev *gspca_dev,
96 struct v4l2_format *fmt);
97 typedef int (*cam_frmsize_op) (struct gspca_dev *gspca_dev,
98 struct v4l2_frmsizeenum *fsize);
100 /* subdriver description */
103 const char *name; /* sub-driver name */
104 /* mandatory operations */
105 cam_cf_op config; /* called on probe */
106 cam_op init; /* called on probe and resume */
107 cam_op init_controls; /* called on probe */
108 cam_v_op probe_error; /* called if probe failed, do cleanup here */
109 cam_op start; /* called on stream on after URBs creation */
111 /* optional operations */
112 cam_op isoc_init; /* called on stream on before getting the EP */
113 cam_op isoc_nego; /* called when URB submit failed with NOSPC */
114 cam_v_op stopN; /* called on stream off - main alt */
115 cam_v_op stop0; /* called on stream off & disconnect - alt 0 */
116 cam_v_op dq_callback; /* called when a frame has been dequeued */
117 cam_get_jpg_op get_jcomp;
118 cam_set_jpg_op set_jcomp;
119 cam_streamparm_op get_streamparm;
120 cam_streamparm_op set_streamparm;
121 cam_format_op try_fmt;
122 cam_frmsize_op enum_framesizes;
123 #ifdef CONFIG_VIDEO_ADV_DEBUG
124 cam_set_reg_op set_register;
125 cam_get_reg_op get_register;
126 cam_chip_info_op get_chip_info;
128 #if IS_ENABLED(CONFIG_INPUT)
129 cam_int_pkt_op int_pkt_scan;
130 /* other_input makes the gspca core create gspca_dev->input even when
131 int_pkt_scan is NULL, for cams with non interrupt driven buttons */
136 /* packet types when moving from iso buf to frame buf */
137 enum gspca_packet_type {
144 struct gspca_buffer {
145 struct vb2_v4l2_buffer vb;
146 struct list_head list;
149 static inline struct gspca_buffer *to_gspca_buffer(struct vb2_buffer *vb2)
151 return container_of(vb2, struct gspca_buffer, vb.vb2_buf);
155 struct video_device vdev; /* !! must be the first item */
156 struct module *module; /* subdriver handling the device */
157 struct v4l2_device v4l2_dev;
158 struct usb_device *dev;
160 #if IS_ENABLED(CONFIG_INPUT)
161 struct input_dev *input_dev;
162 char phys[64]; /* physical device path */
165 struct cam cam; /* device information */
166 const struct sd_desc *sd_desc; /* subdriver description */
167 struct v4l2_ctrl_handler ctrl_handler;
169 /* autogain and exposure or gain control cluster, these are global as
170 the autogain/exposure functions in autogain_functions.c use them */
172 struct v4l2_ctrl *autogain;
173 struct v4l2_ctrl *exposure;
174 struct v4l2_ctrl *gain;
175 int exp_too_low_cnt, exp_too_high_cnt;
178 #define USB_BUF_SZ 64
179 __u8 *usb_buf; /* buffer for USB exchanges */
180 struct urb *urb[MAX_NURBS];
181 #if IS_ENABLED(CONFIG_INPUT)
185 u8 *image; /* image being filled */
186 u32 image_len; /* current length of image */
187 __u8 last_packet_type;
188 __s8 empty_packet; /* if (-1) don't check empty packets */
191 __u8 curr_mode; /* current camera mode */
192 struct v4l2_pix_format pixfmt; /* current mode parameters */
193 __u32 sequence; /* frame sequence number */
195 struct vb2_queue queue;
198 struct list_head buf_list;
200 wait_queue_head_t wq; /* wait queue */
201 struct mutex usb_lock; /* usb exchange protection */
202 int usb_err; /* USB error - protected by usb_lock */
203 u16 pkt_size; /* ISOC packet size */
205 char frozen; /* suspend - resume */
208 char memory; /* memory type (V4L2_MEMORY_xxx) */
209 __u8 iface; /* USB interface number */
210 __u8 alt; /* USB alternate setting */
211 int xfer_ep; /* USB transfer endpoint address */
212 u8 audio; /* presence of audio device */
214 /* (*) These variables are proteced by both usb_lock and queue_lock,
215 that is any code setting them is holding *both*, which means that
216 any code getting them needs to hold at least one of them */
219 int gspca_dev_probe(struct usb_interface *intf,
220 const struct usb_device_id *id,
221 const struct sd_desc *sd_desc,
223 struct module *module);
224 int gspca_dev_probe2(struct usb_interface *intf,
225 const struct usb_device_id *id,
226 const struct sd_desc *sd_desc,
228 struct module *module);
229 void gspca_disconnect(struct usb_interface *intf);
230 void gspca_frame_add(struct gspca_dev *gspca_dev,
231 enum gspca_packet_type packet_type,
235 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
236 int gspca_resume(struct usb_interface *intf);
238 int gspca_expo_autogain(struct gspca_dev *gspca_dev, int avg_lum,
239 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
240 int gspca_coarse_grained_expo_autogain(struct gspca_dev *gspca_dev,
241 int avg_lum, int desired_avg_lum, int deadzone);
243 #endif /* GSPCAV2_H */