1 /***************************************************************************
2 * V4L2 driver for ZC0301[P] Image Processor and Control Chip *
3 * *
4 * Copyright (C) 2006-2007 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 _ZC0301_H_
22 #define _ZC0301_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 <linux/device.h>
29 #include <linux/list.h>
30 #include <linux/spinlock.h>
31 #include <linux/time.h>
32 #include <linux/wait.h>
33 #include <linux/types.h>
34 #include <linux/param.h>
35 #include <linux/mutex.h>
36 #include <linux/rwsem.h>
37 #include <linux/stddef.h>
38 #include <linux/string.h>
39 #include <linux/kref.h>
40
41 #include "zc0301_sensor.h"
42
43 /*****************************************************************************/
44
45 #define ZC0301_DEBUG
46 #define ZC0301_DEBUG_LEVEL 2
47 #define ZC0301_MAX_DEVICES 64
48 #define ZC0301_FORCE_MUNMAP 0
49 #define ZC0301_MAX_FRAMES 32
50 #define ZC0301_COMPRESSION_QUALITY 0
51 #define ZC0301_URBS 2
52 #define ZC0301_ISO_PACKETS 7
53 #define ZC0301_ALTERNATE_SETTING 7
54 #define ZC0301_URB_TIMEOUT msecs_to_jiffies(2 * ZC0301_ISO_PACKETS)
55 #define ZC0301_CTRL_TIMEOUT 100
56 #define ZC0301_FRAME_TIMEOUT 2
57
58 /*****************************************************************************/
59
60 ZC0301_ID_TABLE
61 ZC0301_SENSOR_TABLE
62
63 enum zc0301_frame_state {
64 F_UNUSED,
65 F_QUEUED,
66 F_GRABBING,
67 F_DONE,
68 F_ERROR,
69 };
70
71 struct zc0301_frame_t {
72 void* bufmem;
73 struct v4l2_buffer buf;
74 enum zc0301_frame_state state;
75 struct list_head frame;
76 unsigned long vma_use_count;
77 };
78
79 enum zc0301_dev_state {
80 DEV_INITIALIZED = 0x01,
81 DEV_DISCONNECTED = 0x02,
82 DEV_MISCONFIGURED = 0x04,
83 };
84
85 enum zc0301_io_method {
86 IO_NONE,
87 IO_READ,
88 IO_MMAP,
89 };
90
91 enum zc0301_stream_state {
92 STREAM_OFF,
93 STREAM_INTERRUPT,
94 STREAM_ON,
95 };
96
97 struct zc0301_module_param {
98 u8 force_munmap;
99 u16 frame_timeout;
100 };
101
102 static DECLARE_RWSEM(zc0301_dev_lock);
103
104 struct zc0301_device {
105 struct video_device* v4ldev;
106
107 struct zc0301_sensor sensor;
108
109 struct usb_device* usbdev;
110 struct urb* urb[ZC0301_URBS];
111 void* transfer_buffer[ZC0301_URBS];
112 u8* control_buffer;
113
114 struct zc0301_frame_t *frame_current, frame[ZC0301_MAX_FRAMES];
115 struct list_head inqueue, outqueue;
116 u32 frame_count, nbuffers, nreadbuffers;
117
118 enum zc0301_io_method io;
119 enum zc0301_stream_state stream;
120
121 struct v4l2_jpegcompression compression;
122
123 struct zc0301_module_param module_param;
124
125 struct kref kref;
126 enum zc0301_dev_state state;
127 u8 users;
128
129 struct completion probe;
130 struct mutex open_mutex, fileop_mutex;
131 spinlock_t queue_lock;
132 wait_queue_head_t wait_open, wait_frame, wait_stream;
133 };
134
135 /*****************************************************************************/
136
137 struct zc0301_device*
138 zc0301_match_id(struct zc0301_device* cam, const struct usb_device_id *id)
139 {
140 return usb_match_id(usb_ifnum_to_if(cam->usbdev, 0), id) ? cam : NULL;
141 }
142
143 void
144 zc0301_attach_sensor(struct zc0301_device* cam, struct zc0301_sensor* sensor)
145 {
146 memcpy(&cam->sensor, sensor, sizeof(struct zc0301_sensor));
147 }
148
149 /*****************************************************************************/
150
151 #undef DBG
152 #undef KDBG
153 #ifdef ZC0301_DEBUG
154 # define DBG(level, fmt, args...) \
155 do { \
156 if (debug >= (level)) { \
157 if ((level) == 1) \
158 dev_err(&cam->usbdev->dev, fmt "\n", ## args); \
159 else if ((level) == 2) \
160 dev_info(&cam->usbdev->dev, fmt "\n", ## args); \
161 else if ((level) >= 3) \
162 dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n", \
163 __FILE__, __FUNCTION__, __LINE__ , ## args); \
164 } \
165 } while (0)
166 # define KDBG(level, fmt, args...) \
167 do { \
168 if (debug >= (level)) { \
169 if ((level) == 1 || (level) == 2) \
170 pr_info("zc0301: " fmt "\n", ## args); \
171 else if ((level) == 3) \
172 pr_debug("sn9c102: [%s:%s:%d] " fmt "\n", __FILE__, \
173 __FUNCTION__, __LINE__ , ## args); \
174 } \
175 } while (0)
176 # define V4LDBG(level, name, cmd) \
177 do { \
178 if (debug >= (level)) \
179 v4l_print_ioctl(name, cmd); \
180 } while (0)
181 #else
182 # define DBG(level, fmt, args...) do {;} while(0)
183 # define KDBG(level, fmt, args...) do {;} while(0)
184 # define V4LDBG(level, name, cmd) do {;} while(0)
185 #endif
186
187 #undef PDBG
188 #define PDBG(fmt, args...) \
189 dev_info(&cam->usbdev->dev, "[%s:%s:%d] " fmt "\n", __FILE__, __FUNCTION__, \
190 __LINE__ , ## args)
191
192 #undef PDBGG
193 #define PDBGG(fmt, args...) do {;} while(0) /* placeholder */
194
195 #endif /* _ZC0301_H_ */
196
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