1 /* (C) 1999-2003 Nemosoft Unv.
2 (C) 2004-2006 Luc Saillard (luc@saillard.org)
4 NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
5 driver and thus may have bugs that are not present in the original version.
6 Please send bug reports and support requests to <luc@saillard.org>.
7 The decompression routines have been implemented by reverse-engineering the
8 Nemosoft binary pwcx module. Caveat emptor.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #include <linux/module.h>
29 #include <linux/usb.h>
30 #include <linux/spinlock.h>
31 #include <linux/wait.h>
32 #include <linux/smp_lock.h>
33 #include <linux/version.h>
34 #include <linux/mutex.h>
35 #include <asm/errno.h>
36 #include <linux/videodev.h>
37 #include <media/v4l2-common.h>
39 #include "pwc-uncompress.h"
40 #include <media/pwc-ioctl.h>
45 #define PWC_EXTRAMINOR 12
46 #define PWC_VERSION_CODE KERNEL_VERSION(PWC_MAJOR,PWC_MINOR,PWC_EXTRAMINOR)
47 #define PWC_VERSION "10.0.13"
48 #define PWC_NAME "pwc"
49 #define PFX PWC_NAME ": "
52 /* Trace certain actions in the driver */
53 #define PWC_DEBUG_LEVEL_MODULE (1<<0)
54 #define PWC_DEBUG_LEVEL_PROBE (1<<1)
55 #define PWC_DEBUG_LEVEL_OPEN (1<<2)
56 #define PWC_DEBUG_LEVEL_READ (1<<3)
57 #define PWC_DEBUG_LEVEL_MEMORY (1<<4)
58 #define PWC_DEBUG_LEVEL_FLOW (1<<5)
59 #define PWC_DEBUG_LEVEL_SIZE (1<<6)
60 #define PWC_DEBUG_LEVEL_IOCTL (1<<7)
61 #define PWC_DEBUG_LEVEL_TRACE (1<<8)
63 #define PWC_DEBUG_MODULE(fmt, args...) PWC_DEBUG(MODULE, fmt, ##args)
64 #define PWC_DEBUG_PROBE(fmt, args...) PWC_DEBUG(PROBE, fmt, ##args)
65 #define PWC_DEBUG_OPEN(fmt, args...) PWC_DEBUG(OPEN, fmt, ##args)
66 #define PWC_DEBUG_READ(fmt, args...) PWC_DEBUG(READ, fmt, ##args)
67 #define PWC_DEBUG_MEMORY(fmt, args...) PWC_DEBUG(MEMORY, fmt, ##args)
68 #define PWC_DEBUG_FLOW(fmt, args...) PWC_DEBUG(FLOW, fmt, ##args)
69 #define PWC_DEBUG_SIZE(fmt, args...) PWC_DEBUG(SIZE, fmt, ##args)
70 #define PWC_DEBUG_IOCTL(fmt, args...) PWC_DEBUG(IOCTL, fmt, ##args)
71 #define PWC_DEBUG_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
74 #ifdef CONFIG_USB_PWC_DEBUG
76 #define PWC_DEBUG_LEVEL (PWC_DEBUG_LEVEL_MODULE)
78 #define PWC_DEBUG(level, fmt, args...) do {\
79 if ((PWC_DEBUG_LEVEL_ ##level) & pwc_trace) \
80 printk(KERN_DEBUG PFX fmt, ##args); \
83 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
84 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
85 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
86 #define PWC_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
88 #else /* if ! CONFIG_USB_PWC_DEBUG */
90 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
91 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
92 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
93 #define PWC_TRACE(fmt, args...) do { } while(0)
94 #define PWC_DEBUG(level, fmt, args...) do { } while(0)
100 /* Defines for ToUCam cameras */
101 #define TOUCAM_HEADER_SIZE 8
102 #define TOUCAM_TRAILER_SIZE 4
104 #define FEATURE_MOTOR_PANTILT 0x0001
105 #define FEATURE_CODEC1 0x0002
106 #define FEATURE_CODEC2 0x0004
108 /* Turn certain features on/off */
109 #define PWC_INT_PIPE 0
111 /* Ignore errors in the first N frames, to allow for startup delays */
112 #define FRAME_LOWMARK 5
114 /* Size and number of buffers for the ISO pipe. */
115 #define MAX_ISO_BUFS 2
116 #define ISO_FRAMES_PER_DESC 10
117 #define ISO_MAX_FRAME_SIZE 960
118 #define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
120 /* Frame buffers: contains compressed or uncompressed video data. */
122 /* Maximum size after decompression is 640x480 YUV data, 1.5 * 640 * 480 */
123 #define PWC_FRAME_SIZE (460800 + TOUCAM_HEADER_SIZE + TOUCAM_TRAILER_SIZE)
125 /* Absolute maximum number of buffers available for mmap() */
126 #define MAX_IMAGES 10
128 /* Some macros to quickly find the type of a webcam */
129 #define DEVICE_USE_CODEC1(x) ((x)<675)
130 #define DEVICE_USE_CODEC2(x) ((x)>=675 && (x)<700)
131 #define DEVICE_USE_CODEC3(x) ((x)>=700)
132 #define DEVICE_USE_CODEC23(x) ((x)>=675)
135 #ifndef V4L2_PIX_FMT_PWC1
136 #define V4L2_PIX_FMT_PWC1 v4l2_fourcc('P','W','C','1')
137 #define V4L2_PIX_FMT_PWC2 v4l2_fourcc('P','W','C','2')
140 /* The following structures were based on cpia.h. Why reinvent the wheel? :-) */
149 /* intermediate buffers with raw data from the USB cam */
153 volatile int filled; /* number of bytes filled */
154 struct pwc_frame_buf *next; /* list */
157 /* additionnal informations used when dealing image between kernel and userland */
160 unsigned long offset; /* offset of this buffer in the big array of image_data */
161 int vma_use_count; /* count the number of time this memory is mapped */
166 struct video_device *vdev;
168 /* Pointer to our usb_device */
169 struct usb_device *udev;
171 int type; /* type of cam (645, 646, 675, 680, 690, 720, 730, 740, 750) */
172 int release; /* release number */
173 int features; /* feature bits */
174 char serial[30]; /* serial number (string) */
175 int error_status; /* set when something goes wrong with the cam (unplugged, USB errors) */
176 int usb_init; /* set when the cam has been initialized over USB */
179 int vopen; /* flag */
180 int vendpoint; /* video isoc endpoint */
181 int vcinterface; /* video control interface */
182 int valternate; /* alternate interface needed */
183 int vframes, vsize; /* frames-per-second & size (see PSZ_*) */
184 int vpalette; /* palette: 420P, RAW or RGBBAYER */
185 int vframe_count; /* received frames */
186 int vframes_dumped; /* counter for dumped frames */
187 int vframes_error; /* frames received in error */
188 int vmax_packet_size; /* USB maxpacket size */
189 int vlast_packet_size; /* for frame synchronisation */
190 int visoc_errors; /* number of contiguous ISOC errors */
191 int vcompression; /* desired compression factor */
192 int vbandlength; /* compressed band length; 0 is uncompressed */
193 char vsnapshot; /* snapshot mode */
194 char vsync; /* used by isoc handler */
195 char vmirror; /* for ToUCaM series */
199 unsigned char cmd_buf[13];
201 /* The image acquisition requires 3 to 4 steps:
202 1. data is gathered in short packets from the USB controller
203 2. data is synchronized and packed into a frame buffer
204 3a. in case data is compressed, decompress it directly into image buffer
205 3b. in case data is uncompressed, copy into image buffer with viewport
206 4. data is transferred to the user process
208 Note that MAX_ISO_BUFS != MAX_FRAMES != MAX_IMAGES....
209 We have in effect a back-to-back-double-buffer system.
212 struct pwc_iso_buf sbuf[MAX_ISO_BUFS];
216 struct pwc_frame_buf *fbuf; /* all frames */
217 struct pwc_frame_buf *empty_frames, *empty_frames_tail; /* all empty frames */
218 struct pwc_frame_buf *full_frames, *full_frames_tail; /* all filled frames */
219 struct pwc_frame_buf *fill_frame; /* frame currently being filled */
220 struct pwc_frame_buf *read_frame; /* frame currently read by user process */
221 int frame_header_size, frame_trailer_size;
223 int frame_total_size; /* including header & trailer */
226 /* 3: decompression */
227 void *decompress_data; /* private data for decompression engine */
230 /* We have an 'image' and a 'view', where 'image' is the fixed-size image
231 as delivered by the camera, and 'view' is the size requested by the
232 program. The camera image is centered in this viewport, laced with
233 a gray or black border. view_min <= image <= view <= view_max;
235 int image_mask; /* bitmask of supported sizes */
236 struct pwc_coord view_min, view_max; /* minimum and maximum viewable sizes */
237 struct pwc_coord abs_max; /* maximum supported size with compression */
238 struct pwc_coord image, view; /* image and viewport size */
239 struct pwc_coord offset; /* offset within the viewport */
241 void *image_data; /* total buffer, which is subdivided into ... */
242 struct pwc_imgbuf images[MAX_IMAGES];/* ...several images... */
243 int fill_image; /* ...which are rotated. */
244 int len_per_image; /* length per image */
245 int image_read_pos; /* In case we read data in pieces, keep track of were we are in the imagebuffer */
246 int image_used[MAX_IMAGES]; /* For MCAPTURE and SYNC */
248 struct mutex modlock; /* to prevent races in video_open(), etc */
249 spinlock_t ptrlock; /* for manipulating the buffer pointers */
251 /*** motorized pan/tilt feature */
252 struct pwc_mpt_range angle_range;
253 int pan_angle; /* in degrees * 100 */
254 int tilt_angle; /* absolute angle; 0,0 is home position */
255 int snapshot_button_status; /* set to 1 when the user push the button, reset to 0 when this value is read */
258 wait_queue_head_t frameq; /* When waiting for a frame to finish... */
260 void *usb_int_handler; /* for the interrupt endpoint */
268 /* Global variables */
269 #ifdef CONFIG_USB_PWC_DEBUG
270 extern int pwc_trace;
272 extern int pwc_mbufs;
274 /** functions in pwc-if.c */
275 int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot);
276 int pwc_handle_frame(struct pwc_device *pdev);
277 void pwc_next_image(struct pwc_device *pdev);
278 int pwc_isoc_init(struct pwc_device *pdev);
279 void pwc_isoc_cleanup(struct pwc_device *pdev);
281 /** Functions in pwc-misc.c */
282 /* sizes in pixels */
283 extern const struct pwc_coord pwc_image_sizes[PSZ_MAX];
285 int pwc_decode_size(struct pwc_device *pdev, int width, int height);
286 void pwc_construct(struct pwc_device *pdev);
288 /** Functions in pwc-ctrl.c */
289 /* Request a certain video mode. Returns < 0 if not possible */
290 extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frames, int compression, int snapshot);
291 extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size);
292 /* Calculate the number of bytes per image (not frame) */
293 extern int pwc_mpt_reset(struct pwc_device *pdev, int flags);
294 extern int pwc_mpt_set_angle(struct pwc_device *pdev, int pan, int tilt);
296 /* Various controls; should be obvious. Value 0..65535, or < 0 on error */
297 extern int pwc_get_brightness(struct pwc_device *pdev);
298 extern int pwc_set_brightness(struct pwc_device *pdev, int value);
299 extern int pwc_get_contrast(struct pwc_device *pdev);
300 extern int pwc_set_contrast(struct pwc_device *pdev, int value);
301 extern int pwc_get_gamma(struct pwc_device *pdev);
302 extern int pwc_set_gamma(struct pwc_device *pdev, int value);
303 extern int pwc_get_saturation(struct pwc_device *pdev, int *value);
304 extern int pwc_set_saturation(struct pwc_device *pdev, int value);
305 extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value);
306 extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor);
307 extern int pwc_restore_user(struct pwc_device *pdev);
308 extern int pwc_save_user(struct pwc_device *pdev);
309 extern int pwc_restore_factory(struct pwc_device *pdev);
311 /* exported for use by v4l2 controls */
312 extern int pwc_get_red_gain(struct pwc_device *pdev, int *value);
313 extern int pwc_set_red_gain(struct pwc_device *pdev, int value);
314 extern int pwc_get_blue_gain(struct pwc_device *pdev, int *value);
315 extern int pwc_set_blue_gain(struct pwc_device *pdev, int value);
316 extern int pwc_get_awb(struct pwc_device *pdev);
317 extern int pwc_set_awb(struct pwc_device *pdev, int mode);
318 extern int pwc_set_agc(struct pwc_device *pdev, int mode, int value);
319 extern int pwc_get_agc(struct pwc_device *pdev, int *value);
320 extern int pwc_set_shutter_speed(struct pwc_device *pdev, int mode, int value);
321 extern int pwc_get_shutter_speed(struct pwc_device *pdev, int *value);
323 extern int pwc_set_colour_mode(struct pwc_device *pdev, int colour);
324 extern int pwc_get_colour_mode(struct pwc_device *pdev, int *colour);
325 extern int pwc_set_contour(struct pwc_device *pdev, int contour);
326 extern int pwc_get_contour(struct pwc_device *pdev, int *contour);
327 extern int pwc_set_backlight(struct pwc_device *pdev, int backlight);
328 extern int pwc_get_backlight(struct pwc_device *pdev, int *backlight);
329 extern int pwc_set_flicker(struct pwc_device *pdev, int flicker);
330 extern int pwc_get_flicker(struct pwc_device *pdev, int *flicker);
331 extern int pwc_set_dynamic_noise(struct pwc_device *pdev, int noise);
332 extern int pwc_get_dynamic_noise(struct pwc_device *pdev, int *noise);
334 /* Power down or up the camera; not supported by all models */
335 extern int pwc_camera_power(struct pwc_device *pdev, int power);
337 /* Private ioctl()s; see pwc-ioctl.h */
338 extern int pwc_ioctl(struct pwc_device *pdev, unsigned int cmd, void *arg);
340 /** Functions in pwc-v4l.c */
341 extern int pwc_video_do_ioctl(struct inode *inode, struct file *file,
342 unsigned int cmd, void *arg);
344 /** pwc-uncompress.c */
345 /* Expand frame to image, possibly including decompression. Uses read_frame and fill_image */
346 extern int pwc_decompress(struct pwc_device *pdev);
354 /* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */