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/version.h>
33 #include <linux/mutex.h>
35 #include <asm/errno.h>
36 #include <linux/videodev.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-ioctl.h>
39 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
40 #include <linux/input.h>
43 #include "pwc-uncompress.h"
44 #include <media/pwc-ioctl.h>
49 #define PWC_EXTRAMINOR 12
50 #define PWC_VERSION_CODE KERNEL_VERSION(PWC_MAJOR,PWC_MINOR,PWC_EXTRAMINOR)
51 #define PWC_VERSION "10.0.13"
52 #define PWC_NAME "pwc"
53 #define PFX PWC_NAME ": "
56 /* Trace certain actions in the driver */
57 #define PWC_DEBUG_LEVEL_MODULE (1<<0)
58 #define PWC_DEBUG_LEVEL_PROBE (1<<1)
59 #define PWC_DEBUG_LEVEL_OPEN (1<<2)
60 #define PWC_DEBUG_LEVEL_READ (1<<3)
61 #define PWC_DEBUG_LEVEL_MEMORY (1<<4)
62 #define PWC_DEBUG_LEVEL_FLOW (1<<5)
63 #define PWC_DEBUG_LEVEL_SIZE (1<<6)
64 #define PWC_DEBUG_LEVEL_IOCTL (1<<7)
65 #define PWC_DEBUG_LEVEL_TRACE (1<<8)
67 #define PWC_DEBUG_MODULE(fmt, args...) PWC_DEBUG(MODULE, fmt, ##args)
68 #define PWC_DEBUG_PROBE(fmt, args...) PWC_DEBUG(PROBE, fmt, ##args)
69 #define PWC_DEBUG_OPEN(fmt, args...) PWC_DEBUG(OPEN, fmt, ##args)
70 #define PWC_DEBUG_READ(fmt, args...) PWC_DEBUG(READ, fmt, ##args)
71 #define PWC_DEBUG_MEMORY(fmt, args...) PWC_DEBUG(MEMORY, fmt, ##args)
72 #define PWC_DEBUG_FLOW(fmt, args...) PWC_DEBUG(FLOW, fmt, ##args)
73 #define PWC_DEBUG_SIZE(fmt, args...) PWC_DEBUG(SIZE, fmt, ##args)
74 #define PWC_DEBUG_IOCTL(fmt, args...) PWC_DEBUG(IOCTL, fmt, ##args)
75 #define PWC_DEBUG_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
78 #ifdef CONFIG_USB_PWC_DEBUG
80 #define PWC_DEBUG_LEVEL (PWC_DEBUG_LEVEL_MODULE)
82 #define PWC_DEBUG(level, fmt, args...) do {\
83 if ((PWC_DEBUG_LEVEL_ ##level) & pwc_trace) \
84 printk(KERN_DEBUG PFX fmt, ##args); \
87 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
88 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
89 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
90 #define PWC_TRACE(fmt, args...) PWC_DEBUG(TRACE, fmt, ##args)
92 #else /* if ! CONFIG_USB_PWC_DEBUG */
94 #define PWC_ERROR(fmt, args...) printk(KERN_ERR PFX fmt, ##args)
95 #define PWC_WARNING(fmt, args...) printk(KERN_WARNING PFX fmt, ##args)
96 #define PWC_INFO(fmt, args...) printk(KERN_INFO PFX fmt, ##args)
97 #define PWC_TRACE(fmt, args...) do { } while(0)
98 #define PWC_DEBUG(level, fmt, args...) do { } while(0)
104 /* Defines for ToUCam cameras */
105 #define TOUCAM_HEADER_SIZE 8
106 #define TOUCAM_TRAILER_SIZE 4
108 #define FEATURE_MOTOR_PANTILT 0x0001
109 #define FEATURE_CODEC1 0x0002
110 #define FEATURE_CODEC2 0x0004
112 /* Turn certain features on/off */
113 #define PWC_INT_PIPE 0
115 /* Ignore errors in the first N frames, to allow for startup delays */
116 #define FRAME_LOWMARK 5
118 /* Size and number of buffers for the ISO pipe. */
119 #define MAX_ISO_BUFS 2
120 #define ISO_FRAMES_PER_DESC 10
121 #define ISO_MAX_FRAME_SIZE 960
122 #define ISO_BUFFER_SIZE (ISO_FRAMES_PER_DESC * ISO_MAX_FRAME_SIZE)
124 /* Frame buffers: contains compressed or uncompressed video data. */
126 /* Maximum size after decompression is 640x480 YUV data, 1.5 * 640 * 480 */
127 #define PWC_FRAME_SIZE (460800 + TOUCAM_HEADER_SIZE + TOUCAM_TRAILER_SIZE)
129 /* Absolute maximum number of buffers available for mmap() */
130 #define MAX_IMAGES 10
132 /* Some macros to quickly find the type of a webcam */
133 #define DEVICE_USE_CODEC1(x) ((x)<675)
134 #define DEVICE_USE_CODEC2(x) ((x)>=675 && (x)<700)
135 #define DEVICE_USE_CODEC3(x) ((x)>=700)
136 #define DEVICE_USE_CODEC23(x) ((x)>=675)
139 #ifndef V4L2_PIX_FMT_PWC1
140 #define V4L2_PIX_FMT_PWC1 v4l2_fourcc('P','W','C','1')
141 #define V4L2_PIX_FMT_PWC2 v4l2_fourcc('P','W','C','2')
144 /* The following structures were based on cpia.h. Why reinvent the wheel? :-) */
153 /* intermediate buffers with raw data from the USB cam */
157 volatile int filled; /* number of bytes filled */
158 struct pwc_frame_buf *next; /* list */
161 /* additionnal informations used when dealing image between kernel and userland */
164 unsigned long offset; /* offset of this buffer in the big array of image_data */
165 int vma_use_count; /* count the number of time this memory is mapped */
170 struct video_device *vdev;
172 /* Pointer to our usb_device */
173 struct usb_device *udev;
175 int type; /* type of cam (645, 646, 675, 680, 690, 720, 730, 740, 750) */
176 int release; /* release number */
177 int features; /* feature bits */
178 char serial[30]; /* serial number (string) */
179 int error_status; /* set when something goes wrong with the cam (unplugged, USB errors) */
180 int usb_init; /* set when the cam has been initialized over USB */
183 int vopen; /* flag */
184 int vendpoint; /* video isoc endpoint */
185 int vcinterface; /* video control interface */
186 int valternate; /* alternate interface needed */
187 int vframes, vsize; /* frames-per-second & size (see PSZ_*) */
188 int vpalette; /* palette: 420P, RAW or RGBBAYER */
189 int vframe_count; /* received frames */
190 int vframes_dumped; /* counter for dumped frames */
191 int vframes_error; /* frames received in error */
192 int vmax_packet_size; /* USB maxpacket size */
193 int vlast_packet_size; /* for frame synchronisation */
194 int visoc_errors; /* number of contiguous ISOC errors */
195 int vcompression; /* desired compression factor */
196 int vbandlength; /* compressed band length; 0 is uncompressed */
197 char vsnapshot; /* snapshot mode */
198 char vsync; /* used by isoc handler */
199 char vmirror; /* for ToUCaM series */
203 unsigned char cmd_buf[13];
205 /* The image acquisition requires 3 to 4 steps:
206 1. data is gathered in short packets from the USB controller
207 2. data is synchronized and packed into a frame buffer
208 3a. in case data is compressed, decompress it directly into image buffer
209 3b. in case data is uncompressed, copy into image buffer with viewport
210 4. data is transferred to the user process
212 Note that MAX_ISO_BUFS != MAX_FRAMES != MAX_IMAGES....
213 We have in effect a back-to-back-double-buffer system.
216 struct pwc_iso_buf sbuf[MAX_ISO_BUFS];
220 struct pwc_frame_buf *fbuf; /* all frames */
221 struct pwc_frame_buf *empty_frames, *empty_frames_tail; /* all empty frames */
222 struct pwc_frame_buf *full_frames, *full_frames_tail; /* all filled frames */
223 struct pwc_frame_buf *fill_frame; /* frame currently being filled */
224 struct pwc_frame_buf *read_frame; /* frame currently read by user process */
225 int frame_header_size, frame_trailer_size;
227 int frame_total_size; /* including header & trailer */
230 /* 3: decompression */
231 void *decompress_data; /* private data for decompression engine */
234 /* We have an 'image' and a 'view', where 'image' is the fixed-size image
235 as delivered by the camera, and 'view' is the size requested by the
236 program. The camera image is centered in this viewport, laced with
237 a gray or black border. view_min <= image <= view <= view_max;
239 int image_mask; /* bitmask of supported sizes */
240 struct pwc_coord view_min, view_max; /* minimum and maximum viewable sizes */
241 struct pwc_coord abs_max; /* maximum supported size with compression */
242 struct pwc_coord image, view; /* image and viewport size */
243 struct pwc_coord offset; /* offset within the viewport */
245 void *image_data; /* total buffer, which is subdivided into ... */
246 struct pwc_imgbuf images[MAX_IMAGES];/* ...several images... */
247 int fill_image; /* ...which are rotated. */
248 int len_per_image; /* length per image */
249 int image_read_pos; /* In case we read data in pieces, keep track of were we are in the imagebuffer */
250 int image_used[MAX_IMAGES]; /* For MCAPTURE and SYNC */
252 struct mutex modlock; /* to prevent races in video_open(), etc */
253 spinlock_t ptrlock; /* for manipulating the buffer pointers */
255 /*** motorized pan/tilt feature */
256 struct pwc_mpt_range angle_range;
257 int pan_angle; /* in degrees * 100 */
258 int tilt_angle; /* absolute angle; 0,0 is home position */
259 int snapshot_button_status; /* set to 1 when the user push the button, reset to 0 when this value is read */
260 #ifdef CONFIG_USB_PWC_INPUT_EVDEV
261 struct input_dev *button_dev; /* webcam snapshot button input */
265 wait_queue_head_t frameq; /* When waiting for a frame to finish... */
267 void *usb_int_handler; /* for the interrupt endpoint */
275 /* Global variables */
276 #ifdef CONFIG_USB_PWC_DEBUG
277 extern int pwc_trace;
279 extern int pwc_mbufs;
281 /** functions in pwc-if.c */
282 int pwc_try_video_mode(struct pwc_device *pdev, int width, int height, int new_fps, int new_compression, int new_snapshot);
283 int pwc_handle_frame(struct pwc_device *pdev);
284 void pwc_next_image(struct pwc_device *pdev);
285 int pwc_isoc_init(struct pwc_device *pdev);
286 void pwc_isoc_cleanup(struct pwc_device *pdev);
288 /** Functions in pwc-misc.c */
289 /* sizes in pixels */
290 extern const struct pwc_coord pwc_image_sizes[PSZ_MAX];
292 int pwc_decode_size(struct pwc_device *pdev, int width, int height);
293 void pwc_construct(struct pwc_device *pdev);
295 /** Functions in pwc-ctrl.c */
296 /* Request a certain video mode. Returns < 0 if not possible */
297 extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frames, int compression, int snapshot);
298 extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size);
299 /* Calculate the number of bytes per image (not frame) */
300 extern int pwc_mpt_reset(struct pwc_device *pdev, int flags);
301 extern int pwc_mpt_set_angle(struct pwc_device *pdev, int pan, int tilt);
303 /* Various controls; should be obvious. Value 0..65535, or < 0 on error */
304 extern int pwc_get_brightness(struct pwc_device *pdev);
305 extern int pwc_set_brightness(struct pwc_device *pdev, int value);
306 extern int pwc_get_contrast(struct pwc_device *pdev);
307 extern int pwc_set_contrast(struct pwc_device *pdev, int value);
308 extern int pwc_get_gamma(struct pwc_device *pdev);
309 extern int pwc_set_gamma(struct pwc_device *pdev, int value);
310 extern int pwc_get_saturation(struct pwc_device *pdev, int *value);
311 extern int pwc_set_saturation(struct pwc_device *pdev, int value);
312 extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value);
313 extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor);
314 extern int pwc_restore_user(struct pwc_device *pdev);
315 extern int pwc_save_user(struct pwc_device *pdev);
316 extern int pwc_restore_factory(struct pwc_device *pdev);
318 /* exported for use by v4l2 controls */
319 extern int pwc_get_red_gain(struct pwc_device *pdev, int *value);
320 extern int pwc_set_red_gain(struct pwc_device *pdev, int value);
321 extern int pwc_get_blue_gain(struct pwc_device *pdev, int *value);
322 extern int pwc_set_blue_gain(struct pwc_device *pdev, int value);
323 extern int pwc_get_awb(struct pwc_device *pdev);
324 extern int pwc_set_awb(struct pwc_device *pdev, int mode);
325 extern int pwc_set_agc(struct pwc_device *pdev, int mode, int value);
326 extern int pwc_get_agc(struct pwc_device *pdev, int *value);
327 extern int pwc_set_shutter_speed(struct pwc_device *pdev, int mode, int value);
328 extern int pwc_get_shutter_speed(struct pwc_device *pdev, int *value);
330 extern int pwc_set_colour_mode(struct pwc_device *pdev, int colour);
331 extern int pwc_get_colour_mode(struct pwc_device *pdev, int *colour);
332 extern int pwc_set_contour(struct pwc_device *pdev, int contour);
333 extern int pwc_get_contour(struct pwc_device *pdev, int *contour);
334 extern int pwc_set_backlight(struct pwc_device *pdev, int backlight);
335 extern int pwc_get_backlight(struct pwc_device *pdev, int *backlight);
336 extern int pwc_set_flicker(struct pwc_device *pdev, int flicker);
337 extern int pwc_get_flicker(struct pwc_device *pdev, int *flicker);
338 extern int pwc_set_dynamic_noise(struct pwc_device *pdev, int noise);
339 extern int pwc_get_dynamic_noise(struct pwc_device *pdev, int *noise);
341 /* Power down or up the camera; not supported by all models */
342 extern int pwc_camera_power(struct pwc_device *pdev, int power);
344 /* Private ioctl()s; see pwc-ioctl.h */
345 extern long pwc_ioctl(struct pwc_device *pdev, unsigned int cmd, void *arg);
347 /** Functions in pwc-v4l.c */
348 extern long pwc_video_do_ioctl(struct file *file, unsigned int cmd, void *arg);
350 /** pwc-uncompress.c */
351 /* Expand frame to image, possibly including decompression. Uses read_frame and fill_image */
352 extern int pwc_decompress(struct pwc_device *pdev);
360 /* vim: set cino= formatoptions=croql cindent shiftwidth=8 tabstop=8: */