1 /***************************************************************************
2 * V4L2 driver for SN9C1xx PC Camera Controllers *
3 * *
4 * Copyright (C) 2004-2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21 #ifndef _SN9C102_H_
22 #define _SN9C102_H_
23
24 #include <linux/version.h>
25 #include <linux/usb.h>
26 #include <linux/videodev2.h>
27 #include <media/v4l2-common.h>
28 #include <media/v4l2-ioctl.h>
29 #include <linux/device.h>
30 #include <linux/list.h>
31 #include <linux/spinlock.h>
32 #include <linux/time.h>
33 #include <linux/wait.h>
34 #include <linux/types.h>
35 #include <linux/param.h>
36 #include <linux/rwsem.h>
37 #include <linux/mutex.h>
38 #include <linux/string.h>
39 #include <linux/stddef.h>
40 #include <linux/kref.h>
41
42 #include "sn9c102_config.h"
43 #include "sn9c102_sensor.h"
44 #include "sn9c102_devtable.h"
45
46
47 enum sn9c102_frame_state {
48 F_UNUSED,
49 F_QUEUED,
50 F_GRABBING,
51 F_DONE,
52 F_ERROR,
53 };
54
55 struct sn9c102_frame_t {
56 void* bufmem;
57 struct v4l2_buffer buf;
58 enum sn9c102_frame_state state;
59 struct list_head frame;
60 unsigned long vma_use_count;
61 };
62
63 enum sn9c102_dev_state {
64 DEV_INITIALIZED = 0x01,
65 DEV_DISCONNECTED = 0x02,
66 DEV_MISCONFIGURED = 0x04,
67 };
68
69 enum sn9c102_io_method {
70 IO_NONE,
71 IO_READ,
72 IO_MMAP,
73 };
74
75 enum sn9c102_stream_state {
76 STREAM_OFF,
77 STREAM_INTERRUPT,
78 STREAM_ON,
79 };
80
81 typedef char sn9c102_sof_header_t[62];
82
83 struct sn9c102_sof_t {
84 sn9c102_sof_header_t header;
85 u16 bytesread;
86 };
87
88 struct sn9c102_sysfs_attr {
89 u16 reg, i2c_reg;
90 sn9c102_sof_header_t frame_header;
91 };
92
93 struct sn9c102_module_param {
94 u8 force_munmap;
95 u16 frame_timeout;
96 };
97
98 static DEFINE_MUTEX(sn9c102_sysfs_lock);
99 static DECLARE_RWSEM(sn9c102_dev_lock);
100
101 struct sn9c102_device {
102 struct video_device* v4ldev;
103
104 enum sn9c102_bridge bridge;
105 struct sn9c102_sensor sensor;
106
107 struct usb_device* usbdev;
108 struct urb* urb[SN9C102_URBS];
109 void* transfer_buffer[SN9C102_URBS];
110 u8* control_buffer;
111
112 struct sn9c102_frame_t *frame_current, frame[SN9C102_MAX_FRAMES];
113 struct list_head inqueue, outqueue;
114 u32 frame_count, nbuffers, nreadbuffers;
115
116 enum sn9c102_io_method io;
117 enum sn9c102_stream_state stream;
118
119 struct v4l2_jpegcompression compression;
120
121 struct sn9c102_sysfs_attr sysfs;
122 struct sn9c102_sof_t sof;
123 u16 reg[384];
124
125 struct sn9c102_module_param module_param;
126
127 struct kref kref;
128 enum sn9c102_dev_state state;
129 u8 users;
130
131 struct completion probe;
132 struct mutex open_mutex, fileop_mutex;
133 spinlock_t queue_lock;
134 wait_queue_head_t wait_open, wait_frame, wait_stream;
135 };
136
137 /*****************************************************************************/
138
139 struct sn9c102_device*
140 sn9c102_match_id(struct sn9c102_device* cam, const struct usb_device_id *id)
141 {
142 return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
143 }
144
145
146 void
147 sn9c102_attach_sensor(struct sn9c102_device* cam,
148 const struct sn9c102_sensor* sensor)
149 {
150 memcpy(&cam->sensor, sensor, sizeof(struct sn9c102_sensor));
151 }
152
153
154 enum sn9c102_bridge
155 sn9c102_get_bridge(struct sn9c102_device* cam)
156 {
157 return cam->bridge;
158 }
159
160
161 struct sn9c102_sensor* sn9c102_get_sensor(struct sn9c102_device* cam)
162 {
163 return &cam->sensor;
164 }
165
166 /*****************************************************************************/
167
168 #undef DBG
169 #undef KDBG
170 #ifdef SN9C102_DEBUG
171 # define DBG(level, fmt, args...) \
172 do { \
173 if (debug >= (level)) { \
174 if ((level) == 1) \
175 dev_err(&cam->usbdev->dev, fmt "\n", ## args); \
176 else if ((level) == 2) \
177 dev_info(&cam->usbdev->dev, fmt "\n", ## args); \
178 else if ((level) >= 3) \
179 dev_info(&cam->usbdev->dev, "[%s:%d] " fmt "\n", \
180 __func__, __LINE__ , ## args); \
181 } \
182 } while (0)
183 # define V4LDBG(level, name, cmd) \
184 do { \
185 if (debug >= (level)) \
186 v4l_print_ioctl(name, cmd); \
187 } while (0)
188 # define KDBG(level, fmt, args...) \
189 do { \
190 if (debug >= (level)) { \
191 if ((level) == 1 || (level) == 2) \
192 pr_info("sn9c102: " fmt "\n", ## args); \
193 else if ((level) == 3) \
194 pr_debug("sn9c102: [%s:%d] " fmt "\n", \
195 __func__, __LINE__ , ## args); \
196 } \
197 } while (0)
198 #else
199 # define DBG(level, fmt, args...) do {;} while(0)
200 # define V4LDBG(level, name, cmd) do {;} while(0)
201 # define KDBG(level, fmt, args...) do {;} while(0)
202 #endif
203
204 #undef PDBG
205 #define PDBG(fmt, args...) \
206 dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n", __FILE__, __func__, \
207 __LINE__ , ## args)
208
209 #undef PDBGG
210 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
211
212 #endif /* _SN9C102_H_ */
213
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