1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef GSPCAV2_H
3 #define GSPCAV2_H
4
5 #include <linux/module.h>
6 #include <linux/kernel.h>
7 #include <linux/usb.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>
15
16
17
18 /* GSPCA debug codes */
19
20 #define D_PROBE 1
21 #define D_CONF 2
22 #define D_STREAM 3
23 #define D_FRAM 4
24 #define D_PACK 5
25 #define D_USBI 6
26 #define D_USBO 7
27
28 extern int gspca_debug;
29
30
31 #define gspca_dbg(gspca_dev, level, fmt, ...) \
32 v4l2_dbg(level, gspca_debug, &(gspca_dev)->v4l2_dev, \
33 fmt, ##__VA_ARGS__)
34
35 #define gspca_err(gspca_dev, fmt, ...) \
36 v4l2_err(&(gspca_dev)->v4l2_dev, fmt, ##__VA_ARGS__)
37
38 #define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */
39 /* image transfers */
40 #define MAX_NURBS 4 /* max number of URBs */
41
42
43 /* used to list framerates supported by a camera mode (resolution) */
44 struct framerates {
45 const u8 *rates;
46 int nrates;
47 };
48
49 /* device information - set at probe time */
50 struct cam {
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. */
68 };
69
70 struct gspca_dev;
71 struct gspca_frame;
72
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,
90 u8 *data,
91 int len);
92 typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
93 u8 *data,
94 int len);
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);
99
100 /* subdriver description */
101 struct sd_desc {
102 /* information */
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_op start; /* called on stream on after URBs creation */
109 cam_pkt_op pkt_scan;
110 /* optional operations */
111 cam_op isoc_init; /* called on stream on before getting the EP */
112 cam_op isoc_nego; /* called when URB submit failed with NOSPC */
113 cam_v_op stopN; /* called on stream off - main alt */
114 cam_v_op stop0; /* called on stream off & disconnect - alt 0 */
115 cam_v_op dq_callback; /* called when a frame has been dequeued */
116 cam_get_jpg_op get_jcomp;
117 cam_set_jpg_op set_jcomp;
118 cam_streamparm_op get_streamparm;
119 cam_streamparm_op set_streamparm;
120 cam_format_op try_fmt;
121 cam_frmsize_op enum_framesizes;
122 #ifdef CONFIG_VIDEO_ADV_DEBUG
123 cam_set_reg_op set_register;
124 cam_get_reg_op get_register;
125 cam_chip_info_op get_chip_info;
126 #endif
127 #if IS_ENABLED(CONFIG_INPUT)
128 cam_int_pkt_op int_pkt_scan;
129 /* other_input makes the gspca core create gspca_dev->input even when
130 int_pkt_scan is NULL, for cams with non interrupt driven buttons */
131 u8 other_input;
132 #endif
133 };
134
135 /* packet types when moving from iso buf to frame buf */
136 enum gspca_packet_type {
137 DISCARD_PACKET,
138 FIRST_PACKET,
139 INTER_PACKET,
140 LAST_PACKET
141 };
142
143 struct gspca_buffer {
144 struct vb2_v4l2_buffer vb;
145 struct list_head list;
146 };
147
to_gspca_buffer(struct vb2_buffer * vb2)148 static inline struct gspca_buffer *to_gspca_buffer(struct vb2_buffer *vb2)
149 {
150 return container_of(vb2, struct gspca_buffer, vb.vb2_buf);
151 }
152
153 struct gspca_dev {
154 struct video_device vdev; /* !! must be the first item */
155 struct module *module; /* subdriver handling the device */
156 struct v4l2_device v4l2_dev;
157 struct usb_device *dev;
158
159 #if IS_ENABLED(CONFIG_INPUT)
160 struct input_dev *input_dev;
161 char phys[64]; /* physical device path */
162 #endif
163
164 struct cam cam; /* device information */
165 const struct sd_desc *sd_desc; /* subdriver description */
166 struct v4l2_ctrl_handler ctrl_handler;
167
168 /* autogain and exposure or gain control cluster, these are global as
169 the autogain/exposure functions in autogain_functions.c use them */
170 struct {
171 struct v4l2_ctrl *autogain;
172 struct v4l2_ctrl *exposure;
173 struct v4l2_ctrl *gain;
174 int exp_too_low_cnt, exp_too_high_cnt;
175 };
176
177 #define USB_BUF_SZ 64
178 __u8 *usb_buf; /* buffer for USB exchanges */
179 struct urb *urb[MAX_NURBS];
180 #if IS_ENABLED(CONFIG_INPUT)
181 struct urb *int_urb;
182 #endif
183
184 u8 *image; /* image being filled */
185 u32 image_len; /* current length of image */
186 __u8 last_packet_type;
187 __s8 empty_packet; /* if (-1) don't check empty packets */
188 bool streaming;
189
190 __u8 curr_mode; /* current camera mode */
191 struct v4l2_pix_format pixfmt; /* current mode parameters */
192 __u32 sequence; /* frame sequence number */
193
194 struct vb2_queue queue;
195
196 spinlock_t qlock;
197 struct list_head buf_list;
198
199 wait_queue_head_t wq; /* wait queue */
200 struct mutex usb_lock; /* usb exchange protection */
201 int usb_err; /* USB error - protected by usb_lock */
202 u16 pkt_size; /* ISOC packet size */
203 #ifdef CONFIG_PM
204 char frozen; /* suspend - resume */
205 #endif
206 bool present;
207 char memory; /* memory type (V4L2_MEMORY_xxx) */
208 __u8 iface; /* USB interface number */
209 __u8 alt; /* USB alternate setting */
210 int xfer_ep; /* USB transfer endpoint address */
211 u8 audio; /* presence of audio device */
212
213 /* (*) These variables are proteced by both usb_lock and queue_lock,
214 that is any code setting them is holding *both*, which means that
215 any code getting them needs to hold at least one of them */
216 };
217
218 int gspca_dev_probe(struct usb_interface *intf,
219 const struct usb_device_id *id,
220 const struct sd_desc *sd_desc,
221 int dev_size,
222 struct module *module);
223 int gspca_dev_probe2(struct usb_interface *intf,
224 const struct usb_device_id *id,
225 const struct sd_desc *sd_desc,
226 int dev_size,
227 struct module *module);
228 void gspca_disconnect(struct usb_interface *intf);
229 void gspca_frame_add(struct gspca_dev *gspca_dev,
230 enum gspca_packet_type packet_type,
231 const u8 *data,
232 int len);
233 #ifdef CONFIG_PM
234 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
235 int gspca_resume(struct usb_interface *intf);
236 #endif
237 int gspca_expo_autogain(struct gspca_dev *gspca_dev, int avg_lum,
238 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
239 int gspca_coarse_grained_expo_autogain(struct gspca_dev *gspca_dev,
240 int avg_lum, int desired_avg_lum, int deadzone);
241
242 #endif /* GSPCAV2_H */
243
