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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
28extern 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) */
44struct framerates {
45 const u8 *rates;
46 int nrates;
47};
48
49/* device information - set at probe time */
50struct 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
70struct gspca_dev;
71struct gspca_frame;
72
73/* subdriver operations */
74typedef int (*cam_op) (struct gspca_dev *);
75typedef void (*cam_v_op) (struct gspca_dev *);
76typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
77typedef int (*cam_get_jpg_op) (struct gspca_dev *,
78 struct v4l2_jpegcompression *);
79typedef int (*cam_set_jpg_op) (struct gspca_dev *,
80 const struct v4l2_jpegcompression *);
81typedef int (*cam_get_reg_op) (struct gspca_dev *,
82 struct v4l2_dbg_register *);
83typedef int (*cam_set_reg_op) (struct gspca_dev *,
84 const struct v4l2_dbg_register *);
85typedef int (*cam_chip_info_op) (struct gspca_dev *,
86 struct v4l2_dbg_chip_info *);
87typedef void (*cam_streamparm_op) (struct gspca_dev *,
88 struct v4l2_streamparm *);
89typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
90 u8 *data,
91 int len);
92typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
93 u8 *data,
94 int len);
95typedef void (*cam_format_op) (struct gspca_dev *gspca_dev,
96 struct v4l2_format *fmt);
97typedef int (*cam_frmsize_op) (struct gspca_dev *gspca_dev,
98 struct v4l2_frmsizeenum *fsize);
99
100/* subdriver description */
101struct 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_v_op probe_error; /* called if probe failed, do cleanup here */
109 cam_op start; /* called on stream on after URBs creation */
110 cam_pkt_op pkt_scan;
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;
127#endif
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 */
132 u8 other_input;
133#endif
134};
135
136/* packet types when moving from iso buf to frame buf */
137enum gspca_packet_type {
138 DISCARD_PACKET,
139 FIRST_PACKET,
140 INTER_PACKET,
141 LAST_PACKET
142};
143
144struct gspca_buffer {
145 struct vb2_v4l2_buffer vb;
146 struct list_head list;
147};
148
149static inline struct gspca_buffer *to_gspca_buffer(struct vb2_buffer *vb2)
150{
151 return container_of(vb2, struct gspca_buffer, vb.vb2_buf);
152}
153
154struct gspca_dev {
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;
159
160#if IS_ENABLED(CONFIG_INPUT)
161 struct input_dev *input_dev;
162 char phys[64]; /* physical device path */
163#endif
164
165 struct cam cam; /* device information */
166 const struct sd_desc *sd_desc; /* subdriver description */
167 struct v4l2_ctrl_handler ctrl_handler;
168
169 /* autogain and exposure or gain control cluster, these are global as
170 the autogain/exposure functions in autogain_functions.c use them */
171 struct {
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;
176 };
177
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)
182 struct urb *int_urb;
183#endif
184
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 */
189 bool streaming;
190
191 __u8 curr_mode; /* current camera mode */
192 struct v4l2_pix_format pixfmt; /* current mode parameters */
193 __u32 sequence; /* frame sequence number */
194
195 struct vb2_queue queue;
196
197 spinlock_t qlock;
198 struct list_head buf_list;
199
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 */
204#ifdef CONFIG_PM
205 char frozen; /* suspend - resume */
206#endif
207 bool present;
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 */
213
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 */
217};
218
219int gspca_dev_probe(struct usb_interface *intf,
220 const struct usb_device_id *id,
221 const struct sd_desc *sd_desc,
222 int dev_size,
223 struct module *module);
224int gspca_dev_probe2(struct usb_interface *intf,
225 const struct usb_device_id *id,
226 const struct sd_desc *sd_desc,
227 int dev_size,
228 struct module *module);
229void gspca_disconnect(struct usb_interface *intf);
230void gspca_frame_add(struct gspca_dev *gspca_dev,
231 enum gspca_packet_type packet_type,
232 const u8 *data,
233 int len);
234#ifdef CONFIG_PM
235int gspca_suspend(struct usb_interface *intf, pm_message_t message);
236int gspca_resume(struct usb_interface *intf);
237#endif
238int gspca_expo_autogain(struct gspca_dev *gspca_dev, int avg_lum,
239 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
240int gspca_coarse_grained_expo_autogain(struct gspca_dev *gspca_dev,
241 int avg_lum, int desired_avg_lum, int deadzone);
242
243#endif /* GSPCAV2_H */