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V4L/DVB (8428): videodev: rename 'dev' to 'parent'
[linux-2.6/mini2440.git] / drivers / media / video / w9968cf.c
blob3f5a59dc5f8f988dee97beded328a67780d88745
1 /***************************************************************************
2 * Video4Linux driver for W996[87]CF JPEG USB Dual Mode Camera Chip. *
3 * *
4 * Copyright (C) 2002-2004 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * - Memory management code from bttv driver by Ralph Metzler, *
7 * Marcus Metzler and Gerd Knorr. *
8 * - I2C interface to kernel, high-level image sensor control routines and *
9 * some symbolic names from OV511 driver by Mark W. McClelland. *
10 * - Low-level I2C fast write function by Piotr Czerczak. *
11 * - Low-level I2C read function by Frederic Jouault. *
12 * *
13 * This program is free software; you can redistribute it and/or modify *
14 * it under the terms of the GNU General Public License as published by *
15 * the Free Software Foundation; either version 2 of the License, or *
16 * (at your option) any later version. *
17 * *
18 * This program is distributed in the hope that it will be useful, *
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
21 * GNU General Public License for more details. *
22 * *
23 * You should have received a copy of the GNU General Public License *
24 * along with this program; if not, write to the Free Software *
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
26 ***************************************************************************/
27
28 #include <linux/module.h>
29 #include <linux/kernel.h>
30 #include <linux/kmod.h>
31 #include <linux/init.h>
32 #include <linux/fs.h>
33 #include <linux/vmalloc.h>
34 #include <linux/slab.h>
35 #include <linux/mm.h>
36 #include <linux/string.h>
37 #include <linux/errno.h>
38 #include <linux/sched.h>
39 #include <linux/ioctl.h>
40 #include <linux/delay.h>
41 #include <linux/stddef.h>
42 #include <asm/page.h>
43 #include <asm/uaccess.h>
44 #include <linux/page-flags.h>
45
46 #include "w9968cf.h"
47 #include "w9968cf_decoder.h"
48
49 static struct w9968cf_vpp_t* w9968cf_vpp;
50 static DECLARE_WAIT_QUEUE_HEAD(w9968cf_vppmod_wait);
51
52 static LIST_HEAD(w9968cf_dev_list); /* head of V4L registered cameras list */
53 static DEFINE_MUTEX(w9968cf_devlist_mutex); /* semaphore for list traversal */
54
55 static DECLARE_RWSEM(w9968cf_disconnect); /* prevent races with open() */
56
57
58 /****************************************************************************
59 * Module macros and parameters *
60 ****************************************************************************/
61
62 MODULE_DEVICE_TABLE(usb, winbond_id_table);
63
64 MODULE_AUTHOR(W9968CF_MODULE_AUTHOR" "W9968CF_AUTHOR_EMAIL);
65 MODULE_DESCRIPTION(W9968CF_MODULE_NAME);
66 MODULE_VERSION(W9968CF_MODULE_VERSION);
67 MODULE_LICENSE(W9968CF_MODULE_LICENSE);
68 MODULE_SUPPORTED_DEVICE("Video");
69
70 static int ovmod_load = W9968CF_OVMOD_LOAD;
71 static unsigned short simcams = W9968CF_SIMCAMS;
72 static short video_nr[]={[0 ... W9968CF_MAX_DEVICES-1] = -1}; /*-1=first free*/
73 static unsigned int packet_size[] = {[0 ... W9968CF_MAX_DEVICES-1] =
74 W9968CF_PACKET_SIZE};
75 static unsigned short max_buffers[] = {[0 ... W9968CF_MAX_DEVICES-1] =
76 W9968CF_BUFFERS};
77 static int double_buffer[] = {[0 ... W9968CF_MAX_DEVICES-1] =
78 W9968CF_DOUBLE_BUFFER};
79 static int clamping[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_CLAMPING};
80 static unsigned short filter_type[]= {[0 ... W9968CF_MAX_DEVICES-1] =
81 W9968CF_FILTER_TYPE};
82 static int largeview[]= {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_LARGEVIEW};
83 static unsigned short decompression[] = {[0 ... W9968CF_MAX_DEVICES-1] =
84 W9968CF_DECOMPRESSION};
85 static int upscaling[]= {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_UPSCALING};
86 static unsigned short force_palette[] = {[0 ... W9968CF_MAX_DEVICES-1] = 0};
87 static int force_rgb[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_FORCE_RGB};
88 static int autobright[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_AUTOBRIGHT};
89 static int autoexp[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_AUTOEXP};
90 static unsigned short lightfreq[] = {[0 ... W9968CF_MAX_DEVICES-1] =
91 W9968CF_LIGHTFREQ};
92 static int bandingfilter[] = {[0 ... W9968CF_MAX_DEVICES-1]=
93 W9968CF_BANDINGFILTER};
94 static short clockdiv[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_CLOCKDIV};
95 static int backlight[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_BACKLIGHT};
96 static int mirror[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_MIRROR};
97 static int monochrome[] = {[0 ... W9968CF_MAX_DEVICES-1]=W9968CF_MONOCHROME};
98 static unsigned int brightness[] = {[0 ... W9968CF_MAX_DEVICES-1] =
99 W9968CF_BRIGHTNESS};
100 static unsigned int hue[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_HUE};
101 static unsigned int colour[]={[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_COLOUR};
102 static unsigned int contrast[] = {[0 ... W9968CF_MAX_DEVICES-1] =
103 W9968CF_CONTRAST};
104 static unsigned int whiteness[] = {[0 ... W9968CF_MAX_DEVICES-1] =
105 W9968CF_WHITENESS};
106 #ifdef W9968CF_DEBUG
107 static unsigned short debug = W9968CF_DEBUG_LEVEL;
108 static int specific_debug = W9968CF_SPECIFIC_DEBUG;
109 #endif
110
111 static unsigned int param_nv[24]; /* number of values per parameter */
112
113 #ifdef CONFIG_KMOD
114 module_param(ovmod_load, bool, 0644);
115 #endif
116 module_param(simcams, ushort, 0644);
117 module_param_array(video_nr, short, &param_nv[0], 0444);
118 module_param_array(packet_size, uint, &param_nv[1], 0444);
119 module_param_array(max_buffers, ushort, &param_nv[2], 0444);
120 module_param_array(double_buffer, bool, &param_nv[3], 0444);
121 module_param_array(clamping, bool, &param_nv[4], 0444);
122 module_param_array(filter_type, ushort, &param_nv[5], 0444);
123 module_param_array(largeview, bool, &param_nv[6], 0444);
124 module_param_array(decompression, ushort, &param_nv[7], 0444);
125 module_param_array(upscaling, bool, &param_nv[8], 0444);
126 module_param_array(force_palette, ushort, &param_nv[9], 0444);
127 module_param_array(force_rgb, ushort, &param_nv[10], 0444);
128 module_param_array(autobright, bool, &param_nv[11], 0444);
129 module_param_array(autoexp, bool, &param_nv[12], 0444);
130 module_param_array(lightfreq, ushort, &param_nv[13], 0444);
131 module_param_array(bandingfilter, bool, &param_nv[14], 0444);
132 module_param_array(clockdiv, short, &param_nv[15], 0444);
133 module_param_array(backlight, bool, &param_nv[16], 0444);
134 module_param_array(mirror, bool, &param_nv[17], 0444);
135 module_param_array(monochrome, bool, &param_nv[18], 0444);
136 module_param_array(brightness, uint, &param_nv[19], 0444);
137 module_param_array(hue, uint, &param_nv[20], 0444);
138 module_param_array(colour, uint, &param_nv[21], 0444);
139 module_param_array(contrast, uint, &param_nv[22], 0444);
140 module_param_array(whiteness, uint, &param_nv[23], 0444);
141 #ifdef W9968CF_DEBUG
142 module_param(debug, ushort, 0644);
143 module_param(specific_debug, bool, 0644);
144 #endif
145
146 #ifdef CONFIG_KMOD
147 MODULE_PARM_DESC(ovmod_load,
148 "\n<0|1> Automatic 'ovcamchip' module loading."
149 "\n0 disabled, 1 enabled."
150 "\nIf enabled,'insmod' searches for the required 'ovcamchip'"
151 "\nmodule in the system, according to its configuration, and"
152 "\nattempts to load that module automatically. This action is"
153 "\nperformed once as soon as the 'w9968cf' module is loaded"
154 "\ninto memory."
155 "\nDefault value is "__MODULE_STRING(W9968CF_OVMOD_LOAD)"."
156 "\n");
157 #endif
158 MODULE_PARM_DESC(simcams,
159 "\n<n> Number of cameras allowed to stream simultaneously."
160 "\nn may vary from 0 to "
161 __MODULE_STRING(W9968CF_MAX_DEVICES)"."
162 "\nDefault value is "__MODULE_STRING(W9968CF_SIMCAMS)"."
163 "\n");
164 MODULE_PARM_DESC(video_nr,
165 "\n<-1|n[,...]> Specify V4L minor mode number."
166 "\n -1 = use next available (default)"
167 "\n n = use minor number n (integer >= 0)"
168 "\nYou can specify up to "__MODULE_STRING(W9968CF_MAX_DEVICES)
169 " cameras this way."
170 "\nFor example:"
171 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
172 "\nthe second camera and use auto for the first"
173 "\none and for every other camera."
174 "\n");
175 MODULE_PARM_DESC(packet_size,
176 "\n<n[,...]> Specify the maximum data payload"
177 "\nsize in bytes for alternate settings, for each device."
178 "\nn is scaled between 63 and 1023 "
179 "(default is "__MODULE_STRING(W9968CF_PACKET_SIZE)")."
180 "\n");
181 MODULE_PARM_DESC(max_buffers,
182 "\n<n[,...]> For advanced users."
183 "\nSpecify the maximum number of video frame buffers"
184 "\nto allocate for each device, from 2 to "
185 __MODULE_STRING(W9968CF_MAX_BUFFERS)
186 ". (default is "__MODULE_STRING(W9968CF_BUFFERS)")."
187 "\n");
188 MODULE_PARM_DESC(double_buffer,
189 "\n<0|1[,...]> "
190 "Hardware double buffering: 0 disabled, 1 enabled."
191 "\nIt should be enabled if you want smooth video output: if"
192 "\nyou obtain out of sync. video, disable it, or try to"
193 "\ndecrease the 'clockdiv' module parameter value."
194 "\nDefault value is "__MODULE_STRING(W9968CF_DOUBLE_BUFFER)
195 " for every device."
196 "\n");
197 MODULE_PARM_DESC(clamping,
198 "\n<0|1[,...]> Video data clamping: 0 disabled, 1 enabled."
199 "\nDefault value is "__MODULE_STRING(W9968CF_CLAMPING)
200 " for every device."
201 "\n");
202 MODULE_PARM_DESC(filter_type,
203 "\n<0|1|2[,...]> Video filter type."
204 "\n0 none, 1 (1-2-1) 3-tap filter, "
205 "2 (2-3-6-3-2) 5-tap filter."
206 "\nDefault value is "__MODULE_STRING(W9968CF_FILTER_TYPE)
207 " for every device."
208 "\nThe filter is used to reduce noise and aliasing artifacts"
209 "\nproduced by the CCD or CMOS image sensor, and the scaling"
210 " process."
211 "\n");
212 MODULE_PARM_DESC(largeview,
213 "\n<0|1[,...]> Large view: 0 disabled, 1 enabled."
214 "\nDefault value is "__MODULE_STRING(W9968CF_LARGEVIEW)
215 " for every device."
216 "\n");
217 MODULE_PARM_DESC(upscaling,
218 "\n<0|1[,...]> Software scaling (for non-compressed video):"
219 "\n0 disabled, 1 enabled."
220 "\nDisable it if you have a slow CPU or you don't have"
221 " enough memory."
222 "\nDefault value is "__MODULE_STRING(W9968CF_UPSCALING)
223 " for every device."
224 "\nIf 'w9968cf-vpp' is not present, this parameter is"
225 " set to 0."
226 "\n");
227 MODULE_PARM_DESC(decompression,
228 "\n<0|1|2[,...]> Software video decompression:"
229 "\n- 0 disables decompression (doesn't allow formats needing"
230 " decompression)"
231 "\n- 1 forces decompression (allows formats needing"
232 " decompression only);"
233 "\n- 2 allows any permitted formats."
234 "\nFormats supporting compressed video are YUV422P and"
235 " YUV420P/YUV420 "
236 "\nin any resolutions where both width and height are "
237 "a multiple of 16."
238 "\nDefault value is "__MODULE_STRING(W9968CF_DECOMPRESSION)
239 " for every device."
240 "\nIf 'w9968cf-vpp' is not present, forcing decompression is "
241 "\nnot allowed; in this case this parameter is set to 2."
242 "\n");
243 MODULE_PARM_DESC(force_palette,
244 "\n<0"
245 "|" __MODULE_STRING(VIDEO_PALETTE_UYVY)
246 "|" __MODULE_STRING(VIDEO_PALETTE_YUV420)
247 "|" __MODULE_STRING(VIDEO_PALETTE_YUV422P)
248 "|" __MODULE_STRING(VIDEO_PALETTE_YUV420P)
249 "|" __MODULE_STRING(VIDEO_PALETTE_YUYV)
250 "|" __MODULE_STRING(VIDEO_PALETTE_YUV422)
251 "|" __MODULE_STRING(VIDEO_PALETTE_GREY)
252 "|" __MODULE_STRING(VIDEO_PALETTE_RGB555)
253 "|" __MODULE_STRING(VIDEO_PALETTE_RGB565)
254 "|" __MODULE_STRING(VIDEO_PALETTE_RGB24)
255 "|" __MODULE_STRING(VIDEO_PALETTE_RGB32)
256 "[,...]>"
257 " Force picture palette."
258 "\nIn order:"
259 "\n- 0 allows any of the following formats:"
260 "\n- UYVY 16 bpp - Original video, compression disabled"
261 "\n- YUV420 12 bpp - Original video, compression enabled"
262 "\n- YUV422P 16 bpp - Original video, compression enabled"
263 "\n- YUV420P 12 bpp - Original video, compression enabled"
264 "\n- YUVY 16 bpp - Software conversion from UYVY"
265 "\n- YUV422 16 bpp - Software conversion from UYVY"
266 "\n- GREY 8 bpp - Software conversion from UYVY"
267 "\n- RGB555 16 bpp - Software conversion from UYVY"
268 "\n- RGB565 16 bpp - Software conversion from UYVY"
269 "\n- RGB24 24 bpp - Software conversion from UYVY"
270 "\n- RGB32 32 bpp - Software conversion from UYVY"
271 "\nWhen not 0, this parameter will override 'decompression'."
272 "\nDefault value is 0 for every device."
273 "\nInitial palette is "
274 __MODULE_STRING(W9968CF_PALETTE_DECOMP_ON)"."
275 "\nIf 'w9968cf-vpp' is not present, this parameter is"
276 " set to 9 (UYVY)."
277 "\n");
278 MODULE_PARM_DESC(force_rgb,
279 "\n<0|1[,...]> Read RGB video data instead of BGR:"
280 "\n 1 = use RGB component ordering."
281 "\n 0 = use BGR component ordering."
282 "\nThis parameter has effect when using RGBX palettes only."
283 "\nDefault value is "__MODULE_STRING(W9968CF_FORCE_RGB)
284 " for every device."
285 "\n");
286 MODULE_PARM_DESC(autobright,
287 "\n<0|1[,...]> Image sensor automatically changes brightness:"
288 "\n 0 = no, 1 = yes"
289 "\nDefault value is "__MODULE_STRING(W9968CF_AUTOBRIGHT)
290 " for every device."
291 "\n");
292 MODULE_PARM_DESC(autoexp,
293 "\n<0|1[,...]> Image sensor automatically changes exposure:"
294 "\n 0 = no, 1 = yes"
295 "\nDefault value is "__MODULE_STRING(W9968CF_AUTOEXP)
296 " for every device."
297 "\n");
298 MODULE_PARM_DESC(lightfreq,
299 "\n<50|60[,...]> Light frequency in Hz:"
300 "\n 50 for European and Asian lighting,"
301 " 60 for American lighting."
302 "\nDefault value is "__MODULE_STRING(W9968CF_LIGHTFREQ)
303 " for every device."
304 "\n");
305 MODULE_PARM_DESC(bandingfilter,
306 "\n<0|1[,...]> Banding filter to reduce effects of"
307 " fluorescent lighting:"
308 "\n 0 disabled, 1 enabled."
309 "\nThis filter tries to reduce the pattern of horizontal"
310 "\nlight/dark bands caused by some (usually fluorescent)"
311 " lighting."
312 "\nDefault value is "__MODULE_STRING(W9968CF_BANDINGFILTER)
313 " for every device."
314 "\n");
315 MODULE_PARM_DESC(clockdiv,
316 "\n<-1|n[,...]> "
317 "Force pixel clock divisor to a specific value (for experts):"
318 "\n n may vary from 0 to 127."
319 "\n -1 for automatic value."
320 "\nSee also the 'double_buffer' module parameter."
321 "\nDefault value is "__MODULE_STRING(W9968CF_CLOCKDIV)
322 " for every device."
323 "\n");
324 MODULE_PARM_DESC(backlight,
325 "\n<0|1[,...]> Objects are lit from behind:"
326 "\n 0 = no, 1 = yes"
327 "\nDefault value is "__MODULE_STRING(W9968CF_BACKLIGHT)
328 " for every device."
329 "\n");
330 MODULE_PARM_DESC(mirror,
331 "\n<0|1[,...]> Reverse image horizontally:"
332 "\n 0 = no, 1 = yes"
333 "\nDefault value is "__MODULE_STRING(W9968CF_MIRROR)
334 " for every device."
335 "\n");
336 MODULE_PARM_DESC(monochrome,
337 "\n<0|1[,...]> Use image sensor as monochrome sensor:"
338 "\n 0 = no, 1 = yes"
339 "\nNot all the sensors support monochrome color."
340 "\nDefault value is "__MODULE_STRING(W9968CF_MONOCHROME)
341 " for every device."
342 "\n");
343 MODULE_PARM_DESC(brightness,
344 "\n<n[,...]> Set picture brightness (0-65535)."
345 "\nDefault value is "__MODULE_STRING(W9968CF_BRIGHTNESS)
346 " for every device."
347 "\nThis parameter has no effect if 'autobright' is enabled."
348 "\n");
349 MODULE_PARM_DESC(hue,
350 "\n<n[,...]> Set picture hue (0-65535)."
351 "\nDefault value is "__MODULE_STRING(W9968CF_HUE)
352 " for every device."
353 "\n");
354 MODULE_PARM_DESC(colour,
355 "\n<n[,...]> Set picture saturation (0-65535)."
356 "\nDefault value is "__MODULE_STRING(W9968CF_COLOUR)
357 " for every device."
358 "\n");
359 MODULE_PARM_DESC(contrast,
360 "\n<n[,...]> Set picture contrast (0-65535)."
361 "\nDefault value is "__MODULE_STRING(W9968CF_CONTRAST)
362 " for every device."
363 "\n");
364 MODULE_PARM_DESC(whiteness,
365 "\n<n[,...]> Set picture whiteness (0-65535)."
366 "\nDefault value is "__MODULE_STRING(W9968CF_WHITENESS)
367 " for every device."
368 "\n");
369 #ifdef W9968CF_DEBUG
370 MODULE_PARM_DESC(debug,
371 "\n<n> Debugging information level, from 0 to 6:"
372 "\n0 = none (use carefully)"
373 "\n1 = critical errors"
374 "\n2 = significant informations"
375 "\n3 = configuration or general messages"
376 "\n4 = warnings"
377 "\n5 = called functions"
378 "\n6 = function internals"
379 "\nLevel 5 and 6 are useful for testing only, when only "
380 "one device is used."
381 "\nDefault value is "__MODULE_STRING(W9968CF_DEBUG_LEVEL)"."
382 "\n");
383 MODULE_PARM_DESC(specific_debug,
384 "\n<0|1> Enable or disable specific debugging messages:"
385 "\n0 = print messages concerning every level"
386 " <= 'debug' level."
387 "\n1 = print messages concerning the level"
388 " indicated by 'debug'."
389 "\nDefault value is "
390 __MODULE_STRING(W9968CF_SPECIFIC_DEBUG)"."
391 "\n");
392 #endif /* W9968CF_DEBUG */
393
394
395
396 /****************************************************************************
397 * Some prototypes *
398 ****************************************************************************/
399
400 /* Video4linux interface */
401 static const struct file_operations w9968cf_fops;
402 static int w9968cf_open(struct inode*, struct file*);
403 static int w9968cf_release(struct inode*, struct file*);
404 static int w9968cf_mmap(struct file*, struct vm_area_struct*);
405 static int w9968cf_ioctl(struct inode*, struct file*, unsigned, unsigned long);
406 static ssize_t w9968cf_read(struct file*, char __user *, size_t, loff_t*);
407 static int w9968cf_v4l_ioctl(struct inode*, struct file*, unsigned int,
408 void __user *);
409
410 /* USB-specific */
411 static int w9968cf_start_transfer(struct w9968cf_device*);
412 static int w9968cf_stop_transfer(struct w9968cf_device*);
413 static int w9968cf_write_reg(struct w9968cf_device*, u16 value, u16 index);
414 static int w9968cf_read_reg(struct w9968cf_device*, u16 index);
415 static int w9968cf_write_fsb(struct w9968cf_device*, u16* data);
416 static int w9968cf_write_sb(struct w9968cf_device*, u16 value);
417 static int w9968cf_read_sb(struct w9968cf_device*);
418 static int w9968cf_upload_quantizationtables(struct w9968cf_device*);
419 static void w9968cf_urb_complete(struct urb *urb);
420
421 /* Low-level I2C (SMBus) I/O */
422 static int w9968cf_smbus_start(struct w9968cf_device*);
423 static int w9968cf_smbus_stop(struct w9968cf_device*);
424 static int w9968cf_smbus_write_byte(struct w9968cf_device*, u8 v);
425 static int w9968cf_smbus_read_byte(struct w9968cf_device*, u8* v);
426 static int w9968cf_smbus_write_ack(struct w9968cf_device*);
427 static int w9968cf_smbus_read_ack(struct w9968cf_device*);
428 static int w9968cf_smbus_refresh_bus(struct w9968cf_device*);
429 static int w9968cf_i2c_adap_read_byte(struct w9968cf_device* cam,
430 u16 address, u8* value);
431 static int w9968cf_i2c_adap_read_byte_data(struct w9968cf_device*, u16 address,
432 u8 subaddress, u8* value);
433 static int w9968cf_i2c_adap_write_byte(struct w9968cf_device*,
434 u16 address, u8 subaddress);
435 static int w9968cf_i2c_adap_fastwrite_byte_data(struct w9968cf_device*,
436 u16 address, u8 subaddress,
437 u8 value);
438
439 /* I2C interface to kernel */
440 static int w9968cf_i2c_init(struct w9968cf_device*);
441 static int w9968cf_i2c_smbus_xfer(struct i2c_adapter*, u16 addr,
442 unsigned short flags, char read_write,
443 u8 command, int size, union i2c_smbus_data*);
444 static u32 w9968cf_i2c_func(struct i2c_adapter*);
445 static int w9968cf_i2c_attach_inform(struct i2c_client*);
446 static int w9968cf_i2c_detach_inform(struct i2c_client*);
447
448 /* Memory management */
449 static void* rvmalloc(unsigned long size);
450 static void rvfree(void *mem, unsigned long size);
451 static void w9968cf_deallocate_memory(struct w9968cf_device*);
452 static int w9968cf_allocate_memory(struct w9968cf_device*);
453
454 /* High-level image sensor control functions */
455 static int w9968cf_sensor_set_control(struct w9968cf_device*,int cid,int val);
456 static int w9968cf_sensor_get_control(struct w9968cf_device*,int cid,int *val);
457 static int w9968cf_sensor_cmd(struct w9968cf_device*,
458 unsigned int cmd, void *arg);
459 static int w9968cf_sensor_init(struct w9968cf_device*);
460 static int w9968cf_sensor_update_settings(struct w9968cf_device*);
461 static int w9968cf_sensor_get_picture(struct w9968cf_device*);
462 static int w9968cf_sensor_update_picture(struct w9968cf_device*,
463 struct video_picture pict);
464
465 /* Other helper functions */
466 static void w9968cf_configure_camera(struct w9968cf_device*,struct usb_device*,
467 enum w9968cf_model_id,
468 const unsigned short dev_nr);
469 static void w9968cf_adjust_configuration(struct w9968cf_device*);
470 static int w9968cf_turn_on_led(struct w9968cf_device*);
471 static int w9968cf_init_chip(struct w9968cf_device*);
472 static inline u16 w9968cf_valid_palette(u16 palette);
473 static inline u16 w9968cf_valid_depth(u16 palette);
474 static inline u8 w9968cf_need_decompression(u16 palette);
475 static int w9968cf_set_picture(struct w9968cf_device*, struct video_picture);
476 static int w9968cf_set_window(struct w9968cf_device*, struct video_window);
477 static int w9968cf_postprocess_frame(struct w9968cf_device*,
478 struct w9968cf_frame_t*);
479 static int w9968cf_adjust_window_size(struct w9968cf_device*, u16* w, u16* h);
480 static void w9968cf_init_framelist(struct w9968cf_device*);
481 static void w9968cf_push_frame(struct w9968cf_device*, u8 f_num);
482 static void w9968cf_pop_frame(struct w9968cf_device*,struct w9968cf_frame_t**);
483 static void w9968cf_release_resources(struct w9968cf_device*);
484
485
486
487 /****************************************************************************
488 * Symbolic names *
489 ****************************************************************************/
490
491 /* Used to represent a list of values and their respective symbolic names */
492 struct w9968cf_symbolic_list {
493 const int num;
494 const char *name;
495 };
496
497 /*--------------------------------------------------------------------------
498 Returns the name of the matching element in the symbolic_list array. The
499 end of the list must be marked with an element that has a NULL name.
500 --------------------------------------------------------------------------*/
501 static inline const char *
502 symbolic(struct w9968cf_symbolic_list list[], const int num)
503 {
504 int i;
505
506 for (i = 0; list[i].name != NULL; i++)
507 if (list[i].num == num)
508 return (list[i].name);
509
510 return "Unknown";
511 }
512
513 static struct w9968cf_symbolic_list camlist[] = {
514 { W9968CF_MOD_GENERIC, "W996[87]CF JPEG USB Dual Mode Camera" },
515 { W9968CF_MOD_CLVBWGP, "Creative Labs Video Blaster WebCam Go Plus" },
516
517 /* Other cameras (having the same descriptors as Generic W996[87]CF) */
518 { W9968CF_MOD_ADPVDMA, "Aroma Digi Pen VGA Dual Mode ADG-5000" },
519 { W9986CF_MOD_AAU, "AVerMedia AVerTV USB" },
520 { W9968CF_MOD_CLVBWG, "Creative Labs Video Blaster WebCam Go" },
521 { W9968CF_MOD_LL, "Lebon LDC-035A" },
522 { W9968CF_MOD_EEEMC, "Ezonics EZ-802 EZMega Cam" },
523 { W9968CF_MOD_OOE, "OmniVision OV8610-EDE" },
524 { W9968CF_MOD_ODPVDMPC, "OPCOM Digi Pen VGA Dual Mode Pen Camera" },
525 { W9968CF_MOD_PDPII, "Pretec Digi Pen-II" },
526 { W9968CF_MOD_PDP480, "Pretec DigiPen-480" },
527
528 { -1, NULL }
529 };
530
531 static struct w9968cf_symbolic_list senlist[] = {
532 { CC_OV76BE, "OV76BE" },
533 { CC_OV7610, "OV7610" },
534 { CC_OV7620, "OV7620" },
535 { CC_OV7620AE, "OV7620AE" },
536 { CC_OV6620, "OV6620" },
537 { CC_OV6630, "OV6630" },
538 { CC_OV6630AE, "OV6630AE" },
539 { CC_OV6630AF, "OV6630AF" },
540 { -1, NULL }
541 };
542
543 /* Video4Linux1 palettes */
544 static struct w9968cf_symbolic_list v4l1_plist[] = {
545 { VIDEO_PALETTE_GREY, "GREY" },
546 { VIDEO_PALETTE_HI240, "HI240" },
547 { VIDEO_PALETTE_RGB565, "RGB565" },
548 { VIDEO_PALETTE_RGB24, "RGB24" },
549 { VIDEO_PALETTE_RGB32, "RGB32" },
550 { VIDEO_PALETTE_RGB555, "RGB555" },
551 { VIDEO_PALETTE_YUV422, "YUV422" },
552 { VIDEO_PALETTE_YUYV, "YUYV" },
553 { VIDEO_PALETTE_UYVY, "UYVY" },
554 { VIDEO_PALETTE_YUV420, "YUV420" },
555 { VIDEO_PALETTE_YUV411, "YUV411" },
556 { VIDEO_PALETTE_RAW, "RAW" },
557 { VIDEO_PALETTE_YUV422P, "YUV422P" },
558 { VIDEO_PALETTE_YUV411P, "YUV411P" },
559 { VIDEO_PALETTE_YUV420P, "YUV420P" },
560 { VIDEO_PALETTE_YUV410P, "YUV410P" },
561 { -1, NULL }
562 };
563
564 /* Decoder error codes: */
565 static struct w9968cf_symbolic_list decoder_errlist[] = {
566 { W9968CF_DEC_ERR_CORRUPTED_DATA, "Corrupted data" },
567 { W9968CF_DEC_ERR_BUF_OVERFLOW, "Buffer overflow" },
568 { W9968CF_DEC_ERR_NO_SOI, "SOI marker not found" },
569 { W9968CF_DEC_ERR_NO_SOF0, "SOF0 marker not found" },
570 { W9968CF_DEC_ERR_NO_SOS, "SOS marker not found" },
571 { W9968CF_DEC_ERR_NO_EOI, "EOI marker not found" },
572 { -1, NULL }
573 };
574
575 /* URB error codes: */
576 static struct w9968cf_symbolic_list urb_errlist[] = {
577 { -ENOMEM, "No memory for allocation of internal structures" },
578 { -ENOSPC, "The host controller's bandwidth is already consumed" },
579 { -ENOENT, "URB was canceled by unlink_urb" },
580 { -EXDEV, "ISO transfer only partially completed" },
581 { -EAGAIN, "Too match scheduled for the future" },
582 { -ENXIO, "URB already queued" },
583 { -EFBIG, "Too much ISO frames requested" },
584 { -ENOSR, "Buffer error (overrun)" },
585 { -EPIPE, "Specified endpoint is stalled (device not responding)"},
586 { -EOVERFLOW, "Babble (too much data)" },
587 { -EPROTO, "Bit-stuff error (bad cable?)" },
588 { -EILSEQ, "CRC/Timeout" },
589 { -ETIME, "Device does not respond to token" },
590 { -ETIMEDOUT, "Device does not respond to command" },
591 { -1, NULL }
592 };
593
594 /****************************************************************************
595 * Memory management functions *
596 ****************************************************************************/
597 static void* rvmalloc(unsigned long size)
598 {
599 void* mem;
600 unsigned long adr;
601
602 size = PAGE_ALIGN(size);
603 mem = vmalloc_32(size);
604 if (!mem)
605 return NULL;
606
607 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
608 adr = (unsigned long) mem;
609 while (size > 0) {
610 SetPageReserved(vmalloc_to_page((void *)adr));
611 adr += PAGE_SIZE;
612 size -= PAGE_SIZE;
613 }
614
615 return mem;
616 }
617
618
619 static void rvfree(void* mem, unsigned long size)
620 {
621 unsigned long adr;
622
623 if (!mem)
624 return;
625
626 adr = (unsigned long) mem;
627 while ((long) size > 0) {
628 ClearPageReserved(vmalloc_to_page((void *)adr));
629 adr += PAGE_SIZE;
630 size -= PAGE_SIZE;
631 }
632 vfree(mem);
633 }
634
635
636 /*--------------------------------------------------------------------------
637 Deallocate previously allocated memory.
638 --------------------------------------------------------------------------*/
639 static void w9968cf_deallocate_memory(struct w9968cf_device* cam)
640 {
641 u8 i;
642
643 /* Free the isochronous transfer buffers */
644 for (i = 0; i < W9968CF_URBS; i++) {
645 kfree(cam->transfer_buffer[i]);
646 cam->transfer_buffer[i] = NULL;
647 }
648
649 /* Free temporary frame buffer */
650 if (cam->frame_tmp.buffer) {
651 rvfree(cam->frame_tmp.buffer, cam->frame_tmp.size);
652 cam->frame_tmp.buffer = NULL;
653 }
654
655 /* Free helper buffer */
656 if (cam->frame_vpp.buffer) {
657 rvfree(cam->frame_vpp.buffer, cam->frame_vpp.size);
658 cam->frame_vpp.buffer = NULL;
659 }
660
661 /* Free video frame buffers */
662 if (cam->frame[0].buffer) {
663 rvfree(cam->frame[0].buffer, cam->nbuffers*cam->frame[0].size);
664 cam->frame[0].buffer = NULL;
665 }
666
667 cam->nbuffers = 0;
668
669 DBG(5, "Memory successfully deallocated")
670 }
671
672
673 /*--------------------------------------------------------------------------
674 Allocate memory buffers for USB transfers and video frames.
675 This function is called by open() only.
676 Return 0 on success, a negative number otherwise.
677 --------------------------------------------------------------------------*/
678 static int w9968cf_allocate_memory(struct w9968cf_device* cam)
679 {
680 const u16 p_size = wMaxPacketSize[cam->altsetting-1];
681 void* buff = NULL;
682 unsigned long hw_bufsize, vpp_bufsize;
683 u8 i, bpp;
684
685 /* NOTE: Deallocation is done elsewhere in case of error */
686
687 /* Calculate the max amount of raw data per frame from the device */
688 hw_bufsize = cam->maxwidth*cam->maxheight*2;
689
690 /* Calculate the max buf. size needed for post-processing routines */
691 bpp = (w9968cf_vpp) ? 4 : 2;
692 if (cam->upscaling)
693 vpp_bufsize = max(W9968CF_MAX_WIDTH*W9968CF_MAX_HEIGHT*bpp,
694 cam->maxwidth*cam->maxheight*bpp);
695 else
696 vpp_bufsize = cam->maxwidth*cam->maxheight*bpp;
697
698 /* Allocate memory for the isochronous transfer buffers */
699 for (i = 0; i < W9968CF_URBS; i++) {
700 if (!(cam->transfer_buffer[i] =
701 kzalloc(W9968CF_ISO_PACKETS*p_size, GFP_KERNEL))) {
702 DBG(1, "Couldn't allocate memory for the isochronous "
703 "transfer buffers (%u bytes)",
704 p_size * W9968CF_ISO_PACKETS)
705 return -ENOMEM;
706 }
707 }
708
709 /* Allocate memory for the temporary frame buffer */
710 if (!(cam->frame_tmp.buffer = rvmalloc(hw_bufsize))) {
711 DBG(1, "Couldn't allocate memory for the temporary "
712 "video frame buffer (%lu bytes)", hw_bufsize)
713 return -ENOMEM;
714 }
715 cam->frame_tmp.size = hw_bufsize;
716 cam->frame_tmp.number = -1;
717
718 /* Allocate memory for the helper buffer */
719 if (w9968cf_vpp) {
720 if (!(cam->frame_vpp.buffer = rvmalloc(vpp_bufsize))) {
721 DBG(1, "Couldn't allocate memory for the helper buffer"
722 " (%lu bytes)", vpp_bufsize)
723 return -ENOMEM;
724 }
725 cam->frame_vpp.size = vpp_bufsize;
726 } else
727 cam->frame_vpp.buffer = NULL;
728
729 /* Allocate memory for video frame buffers */
730 cam->nbuffers = cam->max_buffers;
731 while (cam->nbuffers >= 2) {
732 if ((buff = rvmalloc(cam->nbuffers * vpp_bufsize)))
733 break;
734 else
735 cam->nbuffers--;
736 }
737
738 if (!buff) {
739 DBG(1, "Couldn't allocate memory for the video frame buffers")
740 cam->nbuffers = 0;
741 return -ENOMEM;
742 }
743
744 if (cam->nbuffers != cam->max_buffers)
745 DBG(2, "Couldn't allocate memory for %u video frame buffers. "
746 "Only memory for %u buffers has been allocated",
747 cam->max_buffers, cam->nbuffers)
748
749 for (i = 0; i < cam->nbuffers; i++) {
750 cam->frame[i].buffer = buff + i*vpp_bufsize;
751 cam->frame[i].size = vpp_bufsize;
752 cam->frame[i].number = i;
753 /* Circular list */
754 if (i != cam->nbuffers-1)
755 cam->frame[i].next = &cam->frame[i+1];
756 else
757 cam->frame[i].next = &cam->frame[0];
758 cam->frame[i].status = F_UNUSED;
759 }
760
761 DBG(5, "Memory successfully allocated")
762 return 0;
763 }
764
765
766
767 /****************************************************************************
768 * USB-specific functions *
769 ****************************************************************************/
770
771 /*--------------------------------------------------------------------------
772 This is an handler function which is called after the URBs are completed.
773 It collects multiple data packets coming from the camera by putting them
774 into frame buffers: one or more zero data length data packets are used to
775 mark the end of a video frame; the first non-zero data packet is the start
776 of the next video frame; if an error is encountered in a packet, the entire
777 video frame is discarded and grabbed again.
778 If there are no requested frames in the FIFO list, packets are collected into
779 a temporary buffer.
780 --------------------------------------------------------------------------*/
781 static void w9968cf_urb_complete(struct urb *urb)
782 {
783 struct w9968cf_device* cam = (struct w9968cf_device*)urb->context;
784 struct w9968cf_frame_t** f;
785 unsigned int len, status;
786 void* pos;
787 u8 i;
788 int err = 0;
789
790 if ((!cam->streaming) || cam->disconnected) {
791 DBG(4, "Got interrupt, but not streaming")
792 return;
793 }
794
795 /* "(*f)" will be used instead of "cam->frame_current" */
796 f = &cam->frame_current;
797
798 /* If a frame has been requested and we are grabbing into
799 the temporary frame, we'll switch to that requested frame */
800 if ((*f) == &cam->frame_tmp && *cam->requested_frame) {
801 if (cam->frame_tmp.status == F_GRABBING) {
802 w9968cf_pop_frame(cam, &cam->frame_current);
803 (*f)->status = F_GRABBING;
804 (*f)->length = cam->frame_tmp.length;
805 memcpy((*f)->buffer, cam->frame_tmp.buffer,
806 (*f)->length);
807 DBG(6, "Switched from temp. frame to frame #%d",
808 (*f)->number)
809 }
810 }
811
812 for (i = 0; i < urb->number_of_packets; i++) {
813 len = urb->iso_frame_desc[i].actual_length;
814 status = urb->iso_frame_desc[i].status;
815 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
816
817 if (status && len != 0) {
818 DBG(4, "URB failed, error in data packet "
819 "(error #%u, %s)",
820 status, symbolic(urb_errlist, status))
821 (*f)->status = F_ERROR;
822 continue;
823 }
824
825 if (len) { /* start of frame */
826
827 if ((*f)->status == F_UNUSED) {
828 (*f)->status = F_GRABBING;
829 (*f)->length = 0;
830 }
831
832 /* Buffer overflows shouldn't happen, however...*/
833 if ((*f)->length + len > (*f)->size) {
834 DBG(4, "Buffer overflow: bad data packets")
835 (*f)->status = F_ERROR;
836 }
837
838 if ((*f)->status == F_GRABBING) {
839 memcpy((*f)->buffer + (*f)->length, pos, len);
840 (*f)->length += len;
841 }
842
843 } else if ((*f)->status == F_GRABBING) { /* end of frame */
844
845 DBG(6, "Frame #%d successfully grabbed", (*f)->number)
846
847 if (cam->vpp_flag & VPP_DECOMPRESSION) {
848 err = w9968cf_vpp->check_headers((*f)->buffer,
849 (*f)->length);
850 if (err) {
851 DBG(4, "Skip corrupted frame: %s",
852 symbolic(decoder_errlist, err))
853 (*f)->status = F_UNUSED;
854 continue; /* grab this frame again */
855 }
856 }
857
858 (*f)->status = F_READY;
859 (*f)->queued = 0;
860
861 /* Take a pointer to the new frame from the FIFO list.
862 If the list is empty,we'll use the temporary frame*/
863 if (*cam->requested_frame)
864 w9968cf_pop_frame(cam, &cam->frame_current);
865 else {
866 cam->frame_current = &cam->frame_tmp;
867 (*f)->status = F_UNUSED;
868 }
869
870 } else if ((*f)->status == F_ERROR)
871 (*f)->status = F_UNUSED; /* grab it again */
872
873 PDBGG("Frame length %lu | pack.#%u | pack.len. %u | state %d",
874 (unsigned long)(*f)->length, i, len, (*f)->status)
875
876 } /* end for */
877
878 /* Resubmit this URB */
879 urb->dev = cam->usbdev;
880 urb->status = 0;
881 spin_lock(&cam->urb_lock);
882 if (cam->streaming)
883 if ((err = usb_submit_urb(urb, GFP_ATOMIC))) {
884 cam->misconfigured = 1;
885 DBG(1, "Couldn't resubmit the URB: error %d, %s",
886 err, symbolic(urb_errlist, err))
887 }
888 spin_unlock(&cam->urb_lock);
889
890 /* Wake up the user process */
891 wake_up_interruptible(&cam->wait_queue);
892 }
893
894
895 /*---------------------------------------------------------------------------
896 Setup the URB structures for the isochronous transfer.
897 Submit the URBs so that the data transfer begins.
898 Return 0 on success, a negative number otherwise.
899 ---------------------------------------------------------------------------*/
900 static int w9968cf_start_transfer(struct w9968cf_device* cam)
901 {
902 struct usb_device *udev = cam->usbdev;
903 struct urb* urb;
904 const u16 p_size = wMaxPacketSize[cam->altsetting-1];
905 u16 w, h, d;
906 int vidcapt;
907 u32 t_size;
908 int err = 0;
909 s8 i, j;
910
911 for (i = 0; i < W9968CF_URBS; i++) {
912 urb = usb_alloc_urb(W9968CF_ISO_PACKETS, GFP_KERNEL);
913 cam->urb[i] = urb;
914 if (!urb) {
915 for (j = 0; j < i; j++)
916 usb_free_urb(cam->urb[j]);
917 DBG(1, "Couldn't allocate the URB structures")
918 return -ENOMEM;
919 }
920
921 urb->dev = udev;
922 urb->context = (void*)cam;
923 urb->pipe = usb_rcvisocpipe(udev, 1);
924 urb->transfer_flags = URB_ISO_ASAP;
925 urb->number_of_packets = W9968CF_ISO_PACKETS;
926 urb->complete = w9968cf_urb_complete;
927 urb->transfer_buffer = cam->transfer_buffer[i];
928 urb->transfer_buffer_length = p_size*W9968CF_ISO_PACKETS;
929 urb->interval = 1;
930 for (j = 0; j < W9968CF_ISO_PACKETS; j++) {
931 urb->iso_frame_desc[j].offset = p_size*j;
932 urb->iso_frame_desc[j].length = p_size;
933 }
934 }
935
936 /* Transfer size per frame, in WORD ! */
937 d = cam->hw_depth;
938 w = cam->hw_width;
939 h = cam->hw_height;
940
941 t_size = (w*h*d)/16;
942
943 err = w9968cf_write_reg(cam, 0xbf17, 0x00); /* reset everything */
944 err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* normal operation */
945
946 /* Transfer size */
947 err += w9968cf_write_reg(cam, t_size & 0xffff, 0x3d); /* low bits */
948 err += w9968cf_write_reg(cam, t_size >> 16, 0x3e); /* high bits */
949
950 if (cam->vpp_flag & VPP_DECOMPRESSION)
951 err += w9968cf_upload_quantizationtables(cam);
952
953 vidcapt = w9968cf_read_reg(cam, 0x16); /* read picture settings */
954 err += w9968cf_write_reg(cam, vidcapt|0x8000, 0x16); /* capt. enable */
955
956 err += usb_set_interface(udev, 0, cam->altsetting);
957 err += w9968cf_write_reg(cam, 0x8a05, 0x3c); /* USB FIFO enable */
958
959 if (err || (vidcapt < 0)) {
960 for (i = 0; i < W9968CF_URBS; i++)
961 usb_free_urb(cam->urb[i]);
962 DBG(1, "Couldn't tell the camera to start the data transfer")
963 return err;
964 }
965
966 w9968cf_init_framelist(cam);
967
968 /* Begin to grab into the temporary buffer */
969 cam->frame_tmp.status = F_UNUSED;
970 cam->frame_tmp.queued = 0;
971 cam->frame_current = &cam->frame_tmp;
972
973 if (!(cam->vpp_flag & VPP_DECOMPRESSION))
974 DBG(5, "Isochronous transfer size: %lu bytes/frame",
975 (unsigned long)t_size*2)
976
977 DBG(5, "Starting the isochronous transfer...")
978
979 cam->streaming = 1;
980
981 /* Submit the URBs */
982 for (i = 0; i < W9968CF_URBS; i++) {
983 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
984 if (err) {
985 cam->streaming = 0;
986 for (j = i-1; j >= 0; j--) {
987 usb_kill_urb(cam->urb[j]);
988 usb_free_urb(cam->urb[j]);
989 }
990 DBG(1, "Couldn't send a transfer request to the "
991 "USB core (error #%d, %s)", err,
992 symbolic(urb_errlist, err))
993 return err;
994 }
995 }
996
997 return 0;
998 }
999
1000
1001 /*--------------------------------------------------------------------------
1002 Stop the isochronous transfer and set alternate setting to 0 (0Mb/s).
1003 Return 0 on success, a negative number otherwise.
1004 --------------------------------------------------------------------------*/
1005 static int w9968cf_stop_transfer(struct w9968cf_device* cam)
1006 {
1007 struct usb_device *udev = cam->usbdev;
1008 unsigned long lock_flags;
1009 int err = 0;
1010 s8 i;
1011
1012 if (!cam->streaming)
1013 return 0;
1014
1015 /* This avoids race conditions with usb_submit_urb()
1016 in the URB completition handler */
1017 spin_lock_irqsave(&cam->urb_lock, lock_flags);
1018 cam->streaming = 0;
1019 spin_unlock_irqrestore(&cam->urb_lock, lock_flags);
1020
1021 for (i = W9968CF_URBS-1; i >= 0; i--)
1022 if (cam->urb[i]) {
1023 usb_kill_urb(cam->urb[i]);
1024 usb_free_urb(cam->urb[i]);
1025 cam->urb[i] = NULL;
1026 }
1027
1028 if (cam->disconnected)
1029 goto exit;
1030
1031 err = w9968cf_write_reg(cam, 0x0a05, 0x3c); /* stop USB transfer */
1032 err += usb_set_interface(udev, 0, 0); /* 0 Mb/s */
1033 err += w9968cf_write_reg(cam, 0x0000, 0x39); /* disable JPEG encoder */
1034 err += w9968cf_write_reg(cam, 0x0000, 0x16); /* stop video capture */
1035
1036 if (err) {
1037 DBG(2, "Failed to tell the camera to stop the isochronous "
1038 "transfer. However this is not a critical error.")
1039 return -EIO;
1040 }
1041
1042 exit:
1043 DBG(5, "Isochronous transfer stopped")
1044 return 0;
1045 }
1046
1047
1048 /*--------------------------------------------------------------------------
1049 Write a W9968CF register.
1050 Return 0 on success, -1 otherwise.
1051 --------------------------------------------------------------------------*/
1052 static int w9968cf_write_reg(struct w9968cf_device* cam, u16 value, u16 index)
1053 {
1054 struct usb_device* udev = cam->usbdev;
1055 int res;
1056
1057 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0,
1058 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
1059 value, index, NULL, 0, W9968CF_USB_CTRL_TIMEOUT);
1060
1061 if (res < 0)
1062 DBG(4, "Failed to write a register "
1063 "(value 0x%04X, index 0x%02X, error #%d, %s)",
1064 value, index, res, symbolic(urb_errlist, res))
1065
1066 return (res >= 0) ? 0 : -1;
1067 }
1068
1069
1070 /*--------------------------------------------------------------------------
1071 Read a W9968CF register.
1072 Return the register value on success, -1 otherwise.
1073 --------------------------------------------------------------------------*/
1074 static int w9968cf_read_reg(struct w9968cf_device* cam, u16 index)
1075 {
1076 struct usb_device* udev = cam->usbdev;
1077 u16* buff = cam->control_buffer;
1078 int res;
1079
1080 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 1,
1081 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1082 0, index, buff, 2, W9968CF_USB_CTRL_TIMEOUT);
1083
1084 if (res < 0)
1085 DBG(4, "Failed to read a register "
1086 "(index 0x%02X, error #%d, %s)",
1087 index, res, symbolic(urb_errlist, res))
1088
1089 return (res >= 0) ? (int)(*buff) : -1;
1090 }
1091
1092
1093 /*--------------------------------------------------------------------------
1094 Write 64-bit data to the fast serial bus registers.
1095 Return 0 on success, -1 otherwise.
1096 --------------------------------------------------------------------------*/
1097 static int w9968cf_write_fsb(struct w9968cf_device* cam, u16* data)
1098 {
1099 struct usb_device* udev = cam->usbdev;
1100 u16 value;
1101 int res;
1102
1103 value = *data++;
1104
1105 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0,
1106 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
1107 value, 0x06, data, 6, W9968CF_USB_CTRL_TIMEOUT);
1108
1109 if (res < 0)
1110 DBG(4, "Failed to write the FSB registers "
1111 "(error #%d, %s)", res, symbolic(urb_errlist, res))
1112
1113 return (res >= 0) ? 0 : -1;
1114 }
1115
1116
1117 /*--------------------------------------------------------------------------
1118 Write data to the serial bus control register.
1119 Return 0 on success, a negative number otherwise.
1120 --------------------------------------------------------------------------*/
1121 static int w9968cf_write_sb(struct w9968cf_device* cam, u16 value)
1122 {
1123 int err = 0;
1124
1125 err = w9968cf_write_reg(cam, value, 0x01);
1126 udelay(W9968CF_I2C_BUS_DELAY);
1127
1128 return err;
1129 }
1130
1131
1132 /*--------------------------------------------------------------------------
1133 Read data from the serial bus control register.
1134 Return 0 on success, a negative number otherwise.
1135 --------------------------------------------------------------------------*/
1136 static int w9968cf_read_sb(struct w9968cf_device* cam)
1137 {
1138 int v = 0;
1139
1140 v = w9968cf_read_reg(cam, 0x01);
1141 udelay(W9968CF_I2C_BUS_DELAY);
1142
1143 return v;
1144 }
1145
1146
1147 /*--------------------------------------------------------------------------
1148 Upload quantization tables for the JPEG compression.
1149 This function is called by w9968cf_start_transfer().
1150 Return 0 on success, a negative number otherwise.
1151 --------------------------------------------------------------------------*/
1152 static int w9968cf_upload_quantizationtables(struct w9968cf_device* cam)
1153 {
1154 u16 a, b;
1155 int err = 0, i, j;
1156
1157 err += w9968cf_write_reg(cam, 0x0010, 0x39); /* JPEG clock enable */
1158
1159 for (i = 0, j = 0; i < 32; i++, j += 2) {
1160 a = Y_QUANTABLE[j] | ((unsigned)(Y_QUANTABLE[j+1]) << 8);
1161 b = UV_QUANTABLE[j] | ((unsigned)(UV_QUANTABLE[j+1]) << 8);
1162 err += w9968cf_write_reg(cam, a, 0x40+i);
1163 err += w9968cf_write_reg(cam, b, 0x60+i);
1164 }
1165 err += w9968cf_write_reg(cam, 0x0012, 0x39); /* JPEG encoder enable */
1166
1167 return err;
1168 }
1169
1170
1171
1172 /****************************************************************************
1173 * Low-level I2C I/O functions. *
1174 * The adapter supports the following I2C transfer functions: *
1175 * i2c_adap_fastwrite_byte_data() (at 400 kHz bit frequency only) *
1176 * i2c_adap_read_byte_data() *
1177 * i2c_adap_read_byte() *
1178 ****************************************************************************/
1179
1180 static int w9968cf_smbus_start(struct w9968cf_device* cam)
1181 {
1182 int err = 0;
1183
1184 err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
1185 err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
1186
1187 return err;
1188 }
1189
1190
1191 static int w9968cf_smbus_stop(struct w9968cf_device* cam)
1192 {
1193 int err = 0;
1194
1195 err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
1196 err += w9968cf_write_sb(cam, 0x0013); /* SDE=1, SDA=1, SCL=1 */
1197
1198 return err;
1199 }
1200
1201
1202 static int w9968cf_smbus_write_byte(struct w9968cf_device* cam, u8 v)
1203 {
1204 u8 bit;
1205 int err = 0, sda;
1206
1207 for (bit = 0 ; bit < 8 ; bit++) {
1208 sda = (v & 0x80) ? 2 : 0;
1209 v <<= 1;
1210 /* SDE=1, SDA=sda, SCL=0 */
1211 err += w9968cf_write_sb(cam, 0x10 | sda);
1212 /* SDE=1, SDA=sda, SCL=1 */
1213 err += w9968cf_write_sb(cam, 0x11 | sda);
1214 /* SDE=1, SDA=sda, SCL=0 */
1215 err += w9968cf_write_sb(cam, 0x10 | sda);
1216 }
1217
1218 return err;
1219 }
1220
1221
1222 static int w9968cf_smbus_read_byte(struct w9968cf_device* cam, u8* v)
1223 {
1224 u8 bit;
1225 int err = 0;
1226
1227 *v = 0;
1228 for (bit = 0 ; bit < 8 ; bit++) {
1229 *v <<= 1;
1230 err += w9968cf_write_sb(cam, 0x0013);
1231 *v |= (w9968cf_read_sb(cam) & 0x0008) ? 1 : 0;
1232 err += w9968cf_write_sb(cam, 0x0012);
1233 }
1234
1235 return err;
1236 }
1237
1238
1239 static int w9968cf_smbus_write_ack(struct w9968cf_device* cam)
1240 {
1241 int err = 0;
1242
1243 err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
1244 err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
1245 err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
1246
1247 return err;
1248 }
1249
1250
1251 static int w9968cf_smbus_read_ack(struct w9968cf_device* cam)
1252 {
1253 int err = 0, sda;
1254
1255 err += w9968cf_write_sb(cam, 0x0013); /* SDE=1, SDA=1, SCL=1 */
1256 sda = (w9968cf_read_sb(cam) & 0x08) ? 1 : 0; /* sda = SDA */
1257 err += w9968cf_write_sb(cam, 0x0012); /* SDE=1, SDA=1, SCL=0 */
1258 if (sda < 0)
1259 err += sda;
1260 if (sda == 1) {
1261 DBG(6, "Couldn't receive the ACK")
1262 err += -1;
1263 }
1264
1265 return err;
1266 }
1267
1268
1269 /* This seems to refresh the communication through the serial bus */
1270 static int w9968cf_smbus_refresh_bus(struct w9968cf_device* cam)
1271 {
1272 int err = 0, j;
1273
1274 for (j = 1; j <= 10; j++) {
1275 err = w9968cf_write_reg(cam, 0x0020, 0x01);
1276 err += w9968cf_write_reg(cam, 0x0000, 0x01);
1277 if (err)
1278 break;
1279 }
1280
1281 return err;
1282 }
1283
1284
1285 /* SMBus protocol: S Addr Wr [A] Subaddr [A] Value [A] P */
1286 static int
1287 w9968cf_i2c_adap_fastwrite_byte_data(struct w9968cf_device* cam,
1288 u16 address, u8 subaddress,u8 value)
1289 {
1290 u16* data = cam->data_buffer;
1291 int err = 0;
1292
1293 err += w9968cf_smbus_refresh_bus(cam);
1294
1295 /* Enable SBUS outputs */
1296 err += w9968cf_write_sb(cam, 0x0020);
1297
1298 data[0] = 0x082f | ((address & 0x80) ? 0x1500 : 0x0);
1299 data[0] |= (address & 0x40) ? 0x4000 : 0x0;
1300 data[1] = 0x2082 | ((address & 0x40) ? 0x0005 : 0x0);
1301 data[1] |= (address & 0x20) ? 0x0150 : 0x0;
1302 data[1] |= (address & 0x10) ? 0x5400 : 0x0;
1303 data[2] = 0x8208 | ((address & 0x08) ? 0x0015 : 0x0);
1304 data[2] |= (address & 0x04) ? 0x0540 : 0x0;
1305 data[2] |= (address & 0x02) ? 0x5000 : 0x0;
1306 data[3] = 0x1d20 | ((address & 0x02) ? 0x0001 : 0x0);
1307 data[3] |= (address & 0x01) ? 0x0054 : 0x0;
1308
1309 err += w9968cf_write_fsb(cam, data);
1310
1311 data[0] = 0x8208 | ((subaddress & 0x80) ? 0x0015 : 0x0);
1312 data[0] |= (subaddress & 0x40) ? 0x0540 : 0x0;
1313 data[0] |= (subaddress & 0x20) ? 0x5000 : 0x0;
1314 data[1] = 0x0820 | ((subaddress & 0x20) ? 0x0001 : 0x0);
1315 data[1] |= (subaddress & 0x10) ? 0x0054 : 0x0;
1316 data[1] |= (subaddress & 0x08) ? 0x1500 : 0x0;
1317 data[1] |= (subaddress & 0x04) ? 0x4000 : 0x0;
1318 data[2] = 0x2082 | ((subaddress & 0x04) ? 0x0005 : 0x0);
1319 data[2] |= (subaddress & 0x02) ? 0x0150 : 0x0;
1320 data[2] |= (subaddress & 0x01) ? 0x5400 : 0x0;
1321 data[3] = 0x001d;
1322
1323 err += w9968cf_write_fsb(cam, data);
1324
1325 data[0] = 0x8208 | ((value & 0x80) ? 0x0015 : 0x0);
1326 data[0] |= (value & 0x40) ? 0x0540 : 0x0;
1327 data[0] |= (value & 0x20) ? 0x5000 : 0x0;
1328 data[1] = 0x0820 | ((value & 0x20) ? 0x0001 : 0x0);
1329 data[1] |= (value & 0x10) ? 0x0054 : 0x0;
1330 data[1] |= (value & 0x08) ? 0x1500 : 0x0;
1331 data[1] |= (value & 0x04) ? 0x4000 : 0x0;
1332 data[2] = 0x2082 | ((value & 0x04) ? 0x0005 : 0x0);
1333 data[2] |= (value & 0x02) ? 0x0150 : 0x0;
1334 data[2] |= (value & 0x01) ? 0x5400 : 0x0;
1335 data[3] = 0xfe1d;
1336
1337 err += w9968cf_write_fsb(cam, data);
1338
1339 /* Disable SBUS outputs */
1340 err += w9968cf_write_sb(cam, 0x0000);
1341
1342 if (!err)
1343 DBG(5, "I2C write byte data done, addr.0x%04X, subaddr.0x%02X "
1344 "value 0x%02X", address, subaddress, value)
1345 else
1346 DBG(5, "I2C write byte data failed, addr.0x%04X, "
1347 "subaddr.0x%02X, value 0x%02X",
1348 address, subaddress, value)
1349
1350 return err;
1351 }
1352
1353
1354 /* SMBus protocol: S Addr Wr [A] Subaddr [A] P S Addr+1 Rd [A] [Value] NA P */
1355 static int
1356 w9968cf_i2c_adap_read_byte_data(struct w9968cf_device* cam,
1357 u16 address, u8 subaddress,
1358 u8* value)
1359 {
1360 int err = 0;
1361
1362 /* Serial data enable */
1363 err += w9968cf_write_sb(cam, 0x0013); /* don't change ! */
1364
1365 err += w9968cf_smbus_start(cam);
1366 err += w9968cf_smbus_write_byte(cam, address);
1367 err += w9968cf_smbus_read_ack(cam);
1368 err += w9968cf_smbus_write_byte(cam, subaddress);
1369 err += w9968cf_smbus_read_ack(cam);
1370 err += w9968cf_smbus_stop(cam);
1371 err += w9968cf_smbus_start(cam);
1372 err += w9968cf_smbus_write_byte(cam, address + 1);
1373 err += w9968cf_smbus_read_ack(cam);
1374 err += w9968cf_smbus_read_byte(cam, value);
1375 err += w9968cf_smbus_write_ack(cam);
1376 err += w9968cf_smbus_stop(cam);
1377
1378 /* Serial data disable */
1379 err += w9968cf_write_sb(cam, 0x0000);
1380
1381 if (!err)
1382 DBG(5, "I2C read byte data done, addr.0x%04X, "
1383 "subaddr.0x%02X, value 0x%02X",
1384 address, subaddress, *value)
1385 else
1386 DBG(5, "I2C read byte data failed, addr.0x%04X, "
1387 "subaddr.0x%02X, wrong value 0x%02X",
1388 address, subaddress, *value)
1389
1390 return err;
1391 }
1392
1393
1394 /* SMBus protocol: S Addr+1 Rd [A] [Value] NA P */
1395 static int
1396 w9968cf_i2c_adap_read_byte(struct w9968cf_device* cam,
1397 u16 address, u8* value)
1398 {
1399 int err = 0;
1400
1401 /* Serial data enable */
1402 err += w9968cf_write_sb(cam, 0x0013);
1403
1404 err += w9968cf_smbus_start(cam);
1405 err += w9968cf_smbus_write_byte(cam, address + 1);
1406 err += w9968cf_smbus_read_ack(cam);
1407 err += w9968cf_smbus_read_byte(cam, value);
1408 err += w9968cf_smbus_write_ack(cam);
1409 err += w9968cf_smbus_stop(cam);
1410
1411 /* Serial data disable */
1412 err += w9968cf_write_sb(cam, 0x0000);
1413
1414 if (!err)
1415 DBG(5, "I2C read byte done, addr.0x%04X, "
1416 "value 0x%02X", address, *value)
1417 else
1418 DBG(5, "I2C read byte failed, addr.0x%04X, "
1419 "wrong value 0x%02X", address, *value)
1420
1421 return err;
1422 }
1423
1424
1425 /* SMBus protocol: S Addr Wr [A] Value [A] P */
1426 static int
1427 w9968cf_i2c_adap_write_byte(struct w9968cf_device* cam,
1428 u16 address, u8 value)
1429 {
1430 DBG(4, "i2c_write_byte() is an unsupported transfer mode")
1431 return -EINVAL;
1432 }
1433
1434
1435
1436 /****************************************************************************
1437 * I2C interface to kernel *
1438 ****************************************************************************/
1439
1440 static int
1441 w9968cf_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
1442 unsigned short flags, char read_write, u8 command,
1443 int size, union i2c_smbus_data *data)
1444 {
1445 struct w9968cf_device* cam = i2c_get_adapdata(adapter);
1446 u8 i;
1447 int err = 0;
1448
1449 switch (addr) {
1450 case OV6xx0_SID:
1451 case OV7xx0_SID:
1452 break;
1453 default:
1454 DBG(4, "Rejected slave ID 0x%04X", addr)
1455 return -EINVAL;
1456 }
1457
1458 if (size == I2C_SMBUS_BYTE) {
1459 /* Why addr <<= 1? See OVXXX0_SID defines in ovcamchip.h */
1460 addr <<= 1;
1461
1462 if (read_write == I2C_SMBUS_WRITE)
1463 err = w9968cf_i2c_adap_write_byte(cam, addr, command);
1464 else if (read_write == I2C_SMBUS_READ)
1465 err = w9968cf_i2c_adap_read_byte(cam,addr,&data->byte);
1466
1467 } else if (size == I2C_SMBUS_BYTE_DATA) {
1468 addr <<= 1;
1469
1470 if (read_write == I2C_SMBUS_WRITE)
1471 err = w9968cf_i2c_adap_fastwrite_byte_data(cam, addr,
1472 command, data->byte);
1473 else if (read_write == I2C_SMBUS_READ) {
1474 for (i = 1; i <= W9968CF_I2C_RW_RETRIES; i++) {
1475 err = w9968cf_i2c_adap_read_byte_data(cam,addr,
1476 command, &data->byte);
1477 if (err) {
1478 if (w9968cf_smbus_refresh_bus(cam)) {
1479 err = -EIO;
1480 break;
1481 }
1482 } else
1483 break;
1484 }
1485
1486 } else
1487 return -EINVAL;
1488
1489 } else {
1490 DBG(4, "Unsupported I2C transfer mode (%d)", size)
1491 return -EINVAL;
1492 }
1493
1494 return err;
1495 }
1496
1497
1498 static u32 w9968cf_i2c_func(struct i2c_adapter* adap)
1499 {
1500 return I2C_FUNC_SMBUS_READ_BYTE |
1501 I2C_FUNC_SMBUS_READ_BYTE_DATA |
1502 I2C_FUNC_SMBUS_WRITE_BYTE_DATA;
1503 }
1504
1505
1506 static int w9968cf_i2c_attach_inform(struct i2c_client* client)
1507 {
1508 struct w9968cf_device* cam = i2c_get_adapdata(client->adapter);
1509 int id = client->driver->id, err = 0;
1510
1511 if (id == I2C_DRIVERID_OVCAMCHIP) {
1512 cam->sensor_client = client;
1513 err = w9968cf_sensor_init(cam);
1514 if (err) {
1515 cam->sensor_client = NULL;
1516 return err;
1517 }
1518 } else {
1519 DBG(4, "Rejected client [%s] with driver [%s]",
1520 client->name, client->driver->driver.name)
1521 return -EINVAL;
1522 }
1523
1524 DBG(5, "I2C attach client [%s] with driver [%s]",
1525 client->name, client->driver->driver.name)
1526
1527 return 0;
1528 }
1529
1530
1531 static int w9968cf_i2c_detach_inform(struct i2c_client* client)
1532 {
1533 struct w9968cf_device* cam = i2c_get_adapdata(client->adapter);
1534
1535 if (cam->sensor_client == client)
1536 cam->sensor_client = NULL;
1537
1538 DBG(5, "I2C detach client [%s]", client->name)
1539
1540 return 0;
1541 }
1542
1543
1544 static int w9968cf_i2c_init(struct w9968cf_device* cam)
1545 {
1546 int err = 0;
1547
1548 static struct i2c_algorithm algo = {
1549 .smbus_xfer = w9968cf_i2c_smbus_xfer,
1550 .functionality = w9968cf_i2c_func,
1551 };
1552
1553 static struct i2c_adapter adap = {
1554 .id = I2C_HW_SMBUS_W9968CF,
1555 .class = I2C_CLASS_CAM_DIGITAL,
1556 .owner = THIS_MODULE,
1557 .client_register = w9968cf_i2c_attach_inform,
1558 .client_unregister = w9968cf_i2c_detach_inform,
1559 .algo = &algo,
1560 };
1561
1562 memcpy(&cam->i2c_adapter, &adap, sizeof(struct i2c_adapter));
1563 strcpy(cam->i2c_adapter.name, "w9968cf");
1564 cam->i2c_adapter.dev.parent = &cam->usbdev->dev;
1565 i2c_set_adapdata(&cam->i2c_adapter, cam);
1566
1567 DBG(6, "Registering I2C adapter with kernel...")
1568
1569 err = i2c_add_adapter(&cam->i2c_adapter);
1570 if (err)
1571 DBG(1, "Failed to register the I2C adapter")
1572 else
1573 DBG(5, "I2C adapter registered")
1574
1575 return err;
1576 }
1577
1578
1579
1580 /****************************************************************************
1581 * Helper functions *
1582 ****************************************************************************/
1583
1584 /*--------------------------------------------------------------------------
1585 Turn on the LED on some webcams. A beep should be heard too.
1586 Return 0 on success, a negative number otherwise.
1587 --------------------------------------------------------------------------*/
1588 static int w9968cf_turn_on_led(struct w9968cf_device* cam)
1589 {
1590 int err = 0;
1591
1592 err += w9968cf_write_reg(cam, 0xff00, 0x00); /* power-down */
1593 err += w9968cf_write_reg(cam, 0xbf17, 0x00); /* reset everything */
1594 err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* normal operation */
1595 err += w9968cf_write_reg(cam, 0x0010, 0x01); /* serial bus, SDS high */
1596 err += w9968cf_write_reg(cam, 0x0000, 0x01); /* serial bus, SDS low */
1597 err += w9968cf_write_reg(cam, 0x0010, 0x01); /* ..high 'beep-beep' */
1598
1599 if (err)
1600 DBG(2, "Couldn't turn on the LED")
1601
1602 DBG(5, "LED turned on")
1603
1604 return err;
1605 }
1606
1607
1608 /*--------------------------------------------------------------------------
1609 Write some registers for the device initialization.
1610 This function is called once on open().
1611 Return 0 on success, a negative number otherwise.
1612 --------------------------------------------------------------------------*/
1613 static int w9968cf_init_chip(struct w9968cf_device* cam)
1614 {
1615 unsigned long hw_bufsize = cam->maxwidth*cam->maxheight*2,
1616 y0 = 0x0000,
1617 u0 = y0 + hw_bufsize/2,
1618 v0 = u0 + hw_bufsize/4,
1619 y1 = v0 + hw_bufsize/4,
1620 u1 = y1 + hw_bufsize/2,
1621 v1 = u1 + hw_bufsize/4;
1622 int err = 0;
1623
1624 err += w9968cf_write_reg(cam, 0xff00, 0x00); /* power off */
1625 err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* power on */
1626
1627 err += w9968cf_write_reg(cam, 0x405d, 0x03); /* DRAM timings */
1628 err += w9968cf_write_reg(cam, 0x0030, 0x04); /* SDRAM timings */
1629
1630 err += w9968cf_write_reg(cam, y0 & 0xffff, 0x20); /* Y buf.0, low */
1631 err += w9968cf_write_reg(cam, y0 >> 16, 0x21); /* Y buf.0, high */
1632 err += w9968cf_write_reg(cam, u0 & 0xffff, 0x24); /* U buf.0, low */
1633 err += w9968cf_write_reg(cam, u0 >> 16, 0x25); /* U buf.0, high */
1634 err += w9968cf_write_reg(cam, v0 & 0xffff, 0x28); /* V buf.0, low */
1635 err += w9968cf_write_reg(cam, v0 >> 16, 0x29); /* V buf.0, high */
1636
1637 err += w9968cf_write_reg(cam, y1 & 0xffff, 0x22); /* Y buf.1, low */
1638 err += w9968cf_write_reg(cam, y1 >> 16, 0x23); /* Y buf.1, high */
1639 err += w9968cf_write_reg(cam, u1 & 0xffff, 0x26); /* U buf.1, low */
1640 err += w9968cf_write_reg(cam, u1 >> 16, 0x27); /* U buf.1, high */
1641 err += w9968cf_write_reg(cam, v1 & 0xffff, 0x2a); /* V buf.1, low */
1642 err += w9968cf_write_reg(cam, v1 >> 16, 0x2b); /* V buf.1, high */
1643
1644 err += w9968cf_write_reg(cam, y1 & 0xffff, 0x32); /* JPEG buf 0 low */
1645 err += w9968cf_write_reg(cam, y1 >> 16, 0x33); /* JPEG buf 0 high */
1646
1647 err += w9968cf_write_reg(cam, y1 & 0xffff, 0x34); /* JPEG buf 1 low */
1648 err += w9968cf_write_reg(cam, y1 >> 16, 0x35); /* JPEG bug 1 high */
1649
1650 err += w9968cf_write_reg(cam, 0x0000, 0x36);/* JPEG restart interval */
1651 err += w9968cf_write_reg(cam, 0x0804, 0x37);/*JPEG VLE FIFO threshold*/
1652 err += w9968cf_write_reg(cam, 0x0000, 0x38);/* disable hw up-scaling */
1653 err += w9968cf_write_reg(cam, 0x0000, 0x3f); /* JPEG/MCTL test data */
1654
1655 err += w9968cf_set_picture(cam, cam->picture); /* this before */
1656 err += w9968cf_set_window(cam, cam->window);
1657
1658 if (err)
1659 DBG(1, "Chip initialization failed")
1660 else
1661 DBG(5, "Chip successfully initialized")
1662
1663 return err;
1664 }
1665
1666
1667 /*--------------------------------------------------------------------------
1668 Return non-zero if the palette is supported, 0 otherwise.
1669 --------------------------------------------------------------------------*/
1670 static inline u16 w9968cf_valid_palette(u16 palette)
1671 {
1672 u8 i = 0;
1673 while (w9968cf_formatlist[i].palette != 0) {
1674 if (palette == w9968cf_formatlist[i].palette)
1675 return palette;
1676 i++;
1677 }
1678 return 0;
1679 }
1680
1681
1682 /*--------------------------------------------------------------------------
1683 Return the depth corresponding to the given palette.
1684 Palette _must_ be supported !
1685 --------------------------------------------------------------------------*/
1686 static inline u16 w9968cf_valid_depth(u16 palette)
1687 {
1688 u8 i=0;
1689 while (w9968cf_formatlist[i].palette != palette)
1690 i++;
1691
1692 return w9968cf_formatlist[i].depth;
1693 }
1694
1695
1696 /*--------------------------------------------------------------------------
1697 Return non-zero if the format requires decompression, 0 otherwise.
1698 --------------------------------------------------------------------------*/
1699 static inline u8 w9968cf_need_decompression(u16 palette)
1700 {
1701 u8 i = 0;
1702 while (w9968cf_formatlist[i].palette != 0) {
1703 if (palette == w9968cf_formatlist[i].palette)
1704 return w9968cf_formatlist[i].compression;
1705 i++;
1706 }
1707 return 0;
1708 }
1709
1710
1711 /*--------------------------------------------------------------------------
1712 Change the picture settings of the camera.
1713 Return 0 on success, a negative number otherwise.
1714 --------------------------------------------------------------------------*/
1715 static int
1716 w9968cf_set_picture(struct w9968cf_device* cam, struct video_picture pict)
1717 {
1718 u16 fmt, hw_depth, hw_palette, reg_v = 0x0000;
1719 int err = 0;
1720
1721 /* Make sure we are using a valid depth */
1722 pict.depth = w9968cf_valid_depth(pict.palette);
1723
1724 fmt = pict.palette;
1725
1726 hw_depth = pict.depth; /* depth used by the winbond chip */
1727 hw_palette = pict.palette; /* palette used by the winbond chip */
1728
1729 /* VS & HS polarities */
1730 reg_v = (cam->vs_polarity << 12) | (cam->hs_polarity << 11);
1731
1732 switch (fmt)
1733 {
1734 case VIDEO_PALETTE_UYVY:
1735 reg_v |= 0x0000;
1736 cam->vpp_flag = VPP_NONE;
1737 break;
1738 case VIDEO_PALETTE_YUV422P:
1739 reg_v |= 0x0002;
1740 cam->vpp_flag = VPP_DECOMPRESSION;
1741 break;
1742 case VIDEO_PALETTE_YUV420:
1743 case VIDEO_PALETTE_YUV420P:
1744 reg_v |= 0x0003;
1745 cam->vpp_flag = VPP_DECOMPRESSION;
1746 break;
1747 case VIDEO_PALETTE_YUYV:
1748 case VIDEO_PALETTE_YUV422:
1749 reg_v |= 0x0000;
1750 cam->vpp_flag = VPP_SWAP_YUV_BYTES;
1751 hw_palette = VIDEO_PALETTE_UYVY;
1752 break;
1753 /* Original video is used instead of RGBX palettes.
1754 Software conversion later. */
1755 case VIDEO_PALETTE_GREY:
1756 case VIDEO_PALETTE_RGB555:
1757 case VIDEO_PALETTE_RGB565:
1758 case VIDEO_PALETTE_RGB24:
1759 case VIDEO_PALETTE_RGB32:
1760 reg_v |= 0x0000; /* UYVY 16 bit is used */
1761 hw_depth = 16;
1762 hw_palette = VIDEO_PALETTE_UYVY;
1763 cam->vpp_flag = VPP_UYVY_TO_RGBX;
1764 break;
1765 }
1766
1767 /* NOTE: due to memory issues, it is better to disable the hardware
1768 double buffering during compression */
1769 if (cam->double_buffer && !(cam->vpp_flag & VPP_DECOMPRESSION))
1770 reg_v |= 0x0080;
1771
1772 if (cam->clamping)
1773 reg_v |= 0x0020;
1774
1775 if (cam->filter_type == 1)
1776 reg_v |= 0x0008;
1777 else if (cam->filter_type == 2)
1778 reg_v |= 0x000c;
1779
1780 if ((err = w9968cf_write_reg(cam, reg_v, 0x16)))
1781 goto error;
1782
1783 if ((err = w9968cf_sensor_update_picture(cam, pict)))
1784 goto error;
1785
1786 /* If all went well, update the device data structure */
1787 memcpy(&cam->picture, &pict, sizeof(pict));
1788 cam->hw_depth = hw_depth;
1789 cam->hw_palette = hw_palette;
1790
1791 /* Settings changed, so we clear the frame buffers */
1792 memset(cam->frame[0].buffer, 0, cam->nbuffers*cam->frame[0].size);
1793
1794 DBG(4, "Palette is %s, depth is %u bpp",
1795 symbolic(v4l1_plist, pict.palette), pict.depth)
1796
1797 return 0;
1798
1799 error:
1800 DBG(1, "Failed to change picture settings")
1801 return err;
1802 }
1803
1804
1805 /*--------------------------------------------------------------------------
1806 Change the capture area size of the camera.
1807 This function _must_ be called _after_ w9968cf_set_picture().
1808 Return 0 on success, a negative number otherwise.
1809 --------------------------------------------------------------------------*/
1810 static int
1811 w9968cf_set_window(struct w9968cf_device* cam, struct video_window win)
1812 {
1813 u16 x, y, w, h, scx, scy, cw, ch, ax, ay;
1814 unsigned long fw, fh;
1815 struct ovcamchip_window s_win;
1816 int err = 0;
1817
1818 /* Work around to avoid FP arithmetics */
1819 #define SC(x) ((x) << 10)
1820 #define UNSC(x) ((x) >> 10)
1821
1822 /* Make sure we are using a supported resolution */
1823 if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width,
1824 (u16*)&win.height)))
1825 goto error;
1826
1827 /* Scaling factors */
1828 fw = SC(win.width) / cam->maxwidth;
1829 fh = SC(win.height) / cam->maxheight;
1830
1831 /* Set up the width and height values used by the chip */
1832 if ((win.width > cam->maxwidth) || (win.height > cam->maxheight)) {
1833 cam->vpp_flag |= VPP_UPSCALE;
1834 /* Calculate largest w,h mantaining the same w/h ratio */
1835 w = (fw >= fh) ? cam->maxwidth : SC(win.width)/fh;
1836 h = (fw >= fh) ? SC(win.height)/fw : cam->maxheight;
1837 if (w < cam->minwidth) /* just in case */
1838 w = cam->minwidth;
1839 if (h < cam->minheight) /* just in case */
1840 h = cam->minheight;
1841 } else {
1842 cam->vpp_flag &= ~VPP_UPSCALE;
1843 w = win.width;
1844 h = win.height;
1845 }
1846
1847 /* x,y offsets of the cropped area */
1848 scx = cam->start_cropx;
1849 scy = cam->start_cropy;
1850
1851 /* Calculate cropped area manteining the right w/h ratio */
1852 if (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE)) {
1853 cw = (fw >= fh) ? cam->maxwidth : SC(win.width)/fh;
1854 ch = (fw >= fh) ? SC(win.height)/fw : cam->maxheight;
1855 } else {
1856 cw = w;
1857 ch = h;
1858 }
1859
1860 /* Setup the window of the sensor */
1861 s_win.format = VIDEO_PALETTE_UYVY;
1862 s_win.width = cam->maxwidth;
1863 s_win.height = cam->maxheight;
1864 s_win.quarter = 0; /* full progressive video */
1865
1866 /* Center it */
1867 s_win.x = (s_win.width - cw) / 2;
1868 s_win.y = (s_win.height - ch) / 2;
1869
1870 /* Clock divisor */
1871 if (cam->clockdiv >= 0)
1872 s_win.clockdiv = cam->clockdiv; /* manual override */
1873 else
1874 switch (cam->sensor) {
1875 case CC_OV6620:
1876 s_win.clockdiv = 0;
1877 break;
1878 case CC_OV6630:
1879 s_win.clockdiv = 0;
1880 break;
1881 case CC_OV76BE:
1882 case CC_OV7610:
1883 case CC_OV7620:
1884 s_win.clockdiv = 0;
1885 break;
1886 default:
1887 s_win.clockdiv = W9968CF_DEF_CLOCKDIVISOR;
1888 }
1889
1890 /* We have to scale win.x and win.y offsets */
1891 if ( (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE))
1892 || (cam->vpp_flag & VPP_UPSCALE) ) {
1893 ax = SC(win.x)/fw;
1894 ay = SC(win.y)/fh;
1895 } else {
1896 ax = win.x;
1897 ay = win.y;
1898 }
1899
1900 if ((ax + cw) > cam->maxwidth)
1901 ax = cam->maxwidth - cw;
1902
1903 if ((ay + ch) > cam->maxheight)
1904 ay = cam->maxheight - ch;
1905
1906 /* Adjust win.x, win.y */
1907 if ( (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE))
1908 || (cam->vpp_flag & VPP_UPSCALE) ) {
1909 win.x = UNSC(ax*fw);
1910 win.y = UNSC(ay*fh);
1911 } else {
1912 win.x = ax;
1913 win.y = ay;
1914 }
1915
1916 /* Offsets used by the chip */
1917 x = ax + s_win.x;
1918 y = ay + s_win.y;
1919
1920 /* Go ! */
1921 if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_S_MODE, &s_win)))
1922 goto error;
1923
1924 err += w9968cf_write_reg(cam, scx + x, 0x10);
1925 err += w9968cf_write_reg(cam, scy + y, 0x11);
1926 err += w9968cf_write_reg(cam, scx + x + cw, 0x12);
1927 err += w9968cf_write_reg(cam, scy + y + ch, 0x13);
1928 err += w9968cf_write_reg(cam, w, 0x14);
1929 err += w9968cf_write_reg(cam, h, 0x15);
1930
1931 /* JPEG width & height */
1932 err += w9968cf_write_reg(cam, w, 0x30);
1933 err += w9968cf_write_reg(cam, h, 0x31);
1934
1935 /* Y & UV frame buffer strides (in WORD) */
1936 if (cam->vpp_flag & VPP_DECOMPRESSION) {
1937 err += w9968cf_write_reg(cam, w/2, 0x2c);
1938 err += w9968cf_write_reg(cam, w/4, 0x2d);
1939 } else
1940 err += w9968cf_write_reg(cam, w, 0x2c);
1941
1942 if (err)
1943 goto error;
1944
1945 /* If all went well, update the device data structure */
1946 memcpy(&cam->window, &win, sizeof(win));
1947 cam->hw_width = w;
1948 cam->hw_height = h;
1949
1950 /* Settings changed, so we clear the frame buffers */
1951 memset(cam->frame[0].buffer, 0, cam->nbuffers*cam->frame[0].size);
1952
1953 DBG(4, "The capture area is %dx%d, Offset (x,y)=(%u,%u)",
1954 win.width, win.height, win.x, win.y)
1955
1956 PDBGG("x=%u ,y=%u, w=%u, h=%u, ax=%u, ay=%u, s_win.x=%u, s_win.y=%u, "
1957 "cw=%u, ch=%u, win.x=%u, win.y=%u, win.width=%u, win.height=%u",
1958 x, y, w, h, ax, ay, s_win.x, s_win.y, cw, ch, win.x, win.y,
1959 win.width, win.height)
1960
1961 return 0;
1962
1963 error:
1964 DBG(1, "Failed to change the capture area size")
1965 return err;
1966 }
1967
1968
1969 /*--------------------------------------------------------------------------
1970 Adjust the asked values for window width and height.
1971 Return 0 on success, -1 otherwise.
1972 --------------------------------------------------------------------------*/
1973 static int
1974 w9968cf_adjust_window_size(struct w9968cf_device* cam, u16* width, u16* height)
1975 {
1976 u16 maxw, maxh;
1977
1978 if ((*width < cam->minwidth) || (*height < cam->minheight))
1979 return -ERANGE;
1980
1981 maxw = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) &&
1982 w9968cf_vpp ? max((u16)W9968CF_MAX_WIDTH, cam->maxwidth)
1983 : cam->maxwidth;
1984 maxh = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) &&
1985 w9968cf_vpp ? max((u16)W9968CF_MAX_HEIGHT, cam->maxheight)
1986 : cam->maxheight;
1987
1988 if (*width > maxw)
1989 *width = maxw;
1990 if (*height > maxh)
1991 *height = maxh;
1992
1993 if (cam->vpp_flag & VPP_DECOMPRESSION) {
1994 *width &= ~15L; /* multiple of 16 */
1995 *height &= ~15L;
1996 }
1997
1998 PDBGG("Window size adjusted w=%u, h=%u ", *width, *height)
1999
2000 return 0;
2001 }
2002
2003
2004 /*--------------------------------------------------------------------------
2005 Initialize the FIFO list of requested frames.
2006 --------------------------------------------------------------------------*/
2007 static void w9968cf_init_framelist(struct w9968cf_device* cam)
2008 {
2009 u8 i;
2010
2011 for (i = 0; i < cam->nbuffers; i++) {
2012 cam->requested_frame[i] = NULL;
2013 cam->frame[i].queued = 0;
2014 cam->frame[i].status = F_UNUSED;
2015 }
2016 }
2017
2018
2019 /*--------------------------------------------------------------------------
2020 Add a frame in the FIFO list of requested frames.
2021 This function is called in process context.
2022 --------------------------------------------------------------------------*/
2023 static void w9968cf_push_frame(struct w9968cf_device* cam, u8 f_num)
2024 {
2025 u8 f;
2026 unsigned long lock_flags;
2027
2028 spin_lock_irqsave(&cam->flist_lock, lock_flags);
2029
2030 for (f=0; cam->requested_frame[f] != NULL; f++);
2031 cam->requested_frame[f] = &cam->frame[f_num];
2032 cam->frame[f_num].queued = 1;
2033 cam->frame[f_num].status = F_UNUSED; /* clear the status */
2034
2035 spin_unlock_irqrestore(&cam->flist_lock, lock_flags);
2036
2037 DBG(6, "Frame #%u pushed into the FIFO list. Position %u", f_num, f)
2038 }
2039
2040
2041 /*--------------------------------------------------------------------------
2042 Read, store and remove the first pointer in the FIFO list of requested
2043 frames. This function is called in interrupt context.
2044 --------------------------------------------------------------------------*/
2045 static void
2046 w9968cf_pop_frame(struct w9968cf_device* cam, struct w9968cf_frame_t** framep)
2047 {
2048 u8 i;
2049
2050 spin_lock(&cam->flist_lock);
2051
2052 *framep = cam->requested_frame[0];
2053
2054 /* Shift the list of pointers */
2055 for (i = 0; i < cam->nbuffers-1; i++)
2056 cam->requested_frame[i] = cam->requested_frame[i+1];
2057 cam->requested_frame[i] = NULL;
2058
2059 spin_unlock(&cam->flist_lock);
2060
2061 DBG(6,"Popped frame #%d from the list", (*framep)->number)
2062 }
2063
2064
2065 /*--------------------------------------------------------------------------
2066 High-level video post-processing routine on grabbed frames.
2067 Return 0 on success, a negative number otherwise.
2068 --------------------------------------------------------------------------*/
2069 static int
2070 w9968cf_postprocess_frame(struct w9968cf_device* cam,
2071 struct w9968cf_frame_t* fr)
2072 {
2073 void *pIn = fr->buffer, *pOut = cam->frame_vpp.buffer, *tmp;
2074 u16 w = cam->window.width,
2075 h = cam->window.height,
2076 d = cam->picture.depth,
2077 fmt = cam->picture.palette,
2078 rgb = cam->force_rgb,
2079 hw_w = cam->hw_width,
2080 hw_h = cam->hw_height,
2081 hw_d = cam->hw_depth;
2082 int err = 0;
2083
2084 #define _PSWAP(pIn, pOut) {tmp = (pIn); (pIn) = (pOut); (pOut) = tmp;}
2085
2086 if (cam->vpp_flag & VPP_DECOMPRESSION) {
2087 memcpy(pOut, pIn, fr->length);
2088 _PSWAP(pIn, pOut)
2089 err = w9968cf_vpp->decode(pIn, fr->length, hw_w, hw_h, pOut);
2090 PDBGG("Compressed frame length: %lu",(unsigned long)fr->length)
2091 fr->length = (hw_w*hw_h*hw_d)/8;
2092 _PSWAP(pIn, pOut)
2093 if (err) {
2094 DBG(4, "An error occurred while decoding the frame: "
2095 "%s", symbolic(decoder_errlist, err))
2096 return err;
2097 } else
2098 DBG(6, "Frame decoded")
2099 }
2100
2101 if (cam->vpp_flag & VPP_SWAP_YUV_BYTES) {
2102 w9968cf_vpp->swap_yuvbytes(pIn, fr->length);
2103 DBG(6, "Original UYVY component ordering changed")
2104 }
2105
2106 if (cam->vpp_flag & VPP_UPSCALE) {
2107 w9968cf_vpp->scale_up(pIn, pOut, hw_w, hw_h, hw_d, w, h);
2108 fr->length = (w*h*hw_d)/8;
2109 _PSWAP(pIn, pOut)
2110 DBG(6, "Vertical up-scaling done: %u,%u,%ubpp->%u,%u",
2111 hw_w, hw_h, hw_d, w, h)
2112 }
2113
2114 if (cam->vpp_flag & VPP_UYVY_TO_RGBX) {
2115 w9968cf_vpp->uyvy_to_rgbx(pIn, fr->length, pOut, fmt, rgb);
2116 fr->length = (w*h*d)/8;
2117 _PSWAP(pIn, pOut)
2118 DBG(6, "UYVY-16bit to %s conversion done",
2119 symbolic(v4l1_plist, fmt))
2120 }
2121
2122 if (pOut == fr->buffer)
2123 memcpy(fr->buffer, cam->frame_vpp.buffer, fr->length);
2124
2125 return 0;
2126 }
2127
2128
2129
2130 /****************************************************************************
2131 * Image sensor control routines *
2132 ****************************************************************************/
2133
2134 static int
2135 w9968cf_sensor_set_control(struct w9968cf_device* cam, int cid, int val)
2136 {
2137 struct ovcamchip_control ctl;
2138 int err;
2139
2140 ctl.id = cid;
2141 ctl.value = val;
2142
2143 err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_S_CTRL, &ctl);
2144
2145 return err;
2146 }
2147
2148
2149 static int
2150 w9968cf_sensor_get_control(struct w9968cf_device* cam, int cid, int* val)
2151 {
2152 struct ovcamchip_control ctl;
2153 int err;
2154
2155 ctl.id = cid;
2156
2157 err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_G_CTRL, &ctl);
2158 if (!err)
2159 *val = ctl.value;
2160
2161 return err;
2162 }
2163
2164
2165 static int
2166 w9968cf_sensor_cmd(struct w9968cf_device* cam, unsigned int cmd, void* arg)
2167 {
2168 struct i2c_client* c = cam->sensor_client;
2169 int rc = 0;
2170
2171 if (!c || !c->driver || !c->driver->command)
2172 return -EINVAL;
2173
2174 rc = c->driver->command(c, cmd, arg);
2175 /* The I2C driver returns -EPERM on non-supported controls */
2176 return (rc < 0 && rc != -EPERM) ? rc : 0;
2177 }
2178
2179
2180 /*--------------------------------------------------------------------------
2181 Update some settings of the image sensor.
2182 Returns: 0 on success, a negative number otherwise.
2183 --------------------------------------------------------------------------*/
2184 static int w9968cf_sensor_update_settings(struct w9968cf_device* cam)
2185 {
2186 int err = 0;
2187
2188 /* Auto brightness */
2189 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_AUTOBRIGHT,
2190 cam->auto_brt);
2191 if (err)
2192 return err;
2193
2194 /* Auto exposure */
2195 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_AUTOEXP,
2196 cam->auto_exp);
2197 if (err)
2198 return err;
2199
2200 /* Banding filter */
2201 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BANDFILT,
2202 cam->bandfilt);
2203 if (err)
2204 return err;
2205
2206 /* Light frequency */
2207 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_FREQ,
2208 cam->lightfreq);
2209 if (err)
2210 return err;
2211
2212 /* Back light */
2213 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BACKLIGHT,
2214 cam->backlight);
2215 if (err)
2216 return err;
2217
2218 /* Mirror */
2219 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_MIRROR,
2220 cam->mirror);
2221 if (err)
2222 return err;
2223
2224 return 0;
2225 }
2226
2227
2228 /*--------------------------------------------------------------------------
2229 Get some current picture settings from the image sensor and update the
2230 internal 'picture' structure of the camera.
2231 Returns: 0 on success, a negative number otherwise.
2232 --------------------------------------------------------------------------*/
2233 static int w9968cf_sensor_get_picture(struct w9968cf_device* cam)
2234 {
2235 int err, v;
2236
2237 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_CONT, &v);
2238 if (err)
2239 return err;
2240 cam->picture.contrast = v;
2241
2242 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_BRIGHT, &v);
2243 if (err)
2244 return err;
2245 cam->picture.brightness = v;
2246
2247 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_SAT, &v);
2248 if (err)
2249 return err;
2250 cam->picture.colour = v;
2251
2252 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_HUE, &v);
2253 if (err)
2254 return err;
2255 cam->picture.hue = v;
2256
2257 DBG(5, "Got picture settings from the image sensor")
2258
2259 PDBGG("Brightness, contrast, hue, colour, whiteness are "
2260 "%u,%u,%u,%u,%u", cam->picture.brightness,cam->picture.contrast,
2261 cam->picture.hue, cam->picture.colour, cam->picture.whiteness)
2262
2263 return 0;
2264 }
2265
2266
2267 /*--------------------------------------------------------------------------
2268 Update picture settings of the image sensor.
2269 Returns: 0 on success, a negative number otherwise.
2270 --------------------------------------------------------------------------*/
2271 static int
2272 w9968cf_sensor_update_picture(struct w9968cf_device* cam,
2273 struct video_picture pict)
2274 {
2275 int err = 0;
2276
2277 if ((!cam->sensor_initialized)
2278 || pict.contrast != cam->picture.contrast) {
2279 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_CONT,
2280 pict.contrast);
2281 if (err)
2282 goto fail;
2283 DBG(4, "Contrast changed from %u to %u",
2284 cam->picture.contrast, pict.contrast)
2285 cam->picture.contrast = pict.contrast;
2286 }
2287
2288 if (((!cam->sensor_initialized) ||
2289 pict.brightness != cam->picture.brightness) && (!cam->auto_brt)) {
2290 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BRIGHT,
2291 pict.brightness);
2292 if (err)
2293 goto fail;
2294 DBG(4, "Brightness changed from %u to %u",
2295 cam->picture.brightness, pict.brightness)
2296 cam->picture.brightness = pict.brightness;
2297 }
2298
2299 if ((!cam->sensor_initialized) || pict.colour != cam->picture.colour) {
2300 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_SAT,
2301 pict.colour);
2302 if (err)
2303 goto fail;
2304 DBG(4, "Colour changed from %u to %u",
2305 cam->picture.colour, pict.colour)
2306 cam->picture.colour = pict.colour;
2307 }
2308
2309 if ((!cam->sensor_initialized) || pict.hue != cam->picture.hue) {
2310 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_HUE,
2311 pict.hue);
2312 if (err)
2313 goto fail;
2314 DBG(4, "Hue changed from %u to %u",
2315 cam->picture.hue, pict.hue)
2316 cam->picture.hue = pict.hue;
2317 }
2318
2319 return 0;
2320
2321 fail:
2322 DBG(4, "Failed to change sensor picture setting")
2323 return err;
2324 }
2325
2326
2327
2328 /****************************************************************************
2329 * Camera configuration *
2330 ****************************************************************************/
2331
2332 /*--------------------------------------------------------------------------
2333 This function is called when a supported image sensor is detected.
2334 Return 0 if the initialization succeeds, a negative number otherwise.
2335 --------------------------------------------------------------------------*/
2336 static int w9968cf_sensor_init(struct w9968cf_device* cam)
2337 {
2338 int err = 0;
2339
2340 if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_INITIALIZE,
2341 &cam->monochrome)))
2342 goto error;
2343
2344 if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_Q_SUBTYPE,
2345 &cam->sensor)))
2346 goto error;
2347
2348 /* NOTE: Make sure width and height are a multiple of 16 */
2349 switch (cam->sensor_client->addr) {
2350 case OV6xx0_SID:
2351 cam->maxwidth = 352;
2352 cam->maxheight = 288;
2353 cam->minwidth = 64;
2354 cam->minheight = 48;
2355 break;
2356 case OV7xx0_SID:
2357 cam->maxwidth = 640;
2358 cam->maxheight = 480;
2359 cam->minwidth = 64;
2360 cam->minheight = 48;
2361 break;
2362 default:
2363 DBG(1, "Not supported image sensor detected for %s",
2364 symbolic(camlist, cam->id))
2365 return -EINVAL;
2366 }
2367
2368 /* These values depend on the ones in the ovxxx0.c sources */
2369 switch (cam->sensor) {
2370 case CC_OV7620:
2371 cam->start_cropx = 287;
2372 cam->start_cropy = 35;
2373 /* Seems to work around a bug in the image sensor */
2374 cam->vs_polarity = 1;
2375 cam->hs_polarity = 1;
2376 break;
2377 default:
2378 cam->start_cropx = 320;
2379 cam->start_cropy = 35;
2380 cam->vs_polarity = 1;
2381 cam->hs_polarity = 0;
2382 }
2383
2384 if ((err = w9968cf_sensor_update_settings(cam)))
2385 goto error;
2386
2387 if ((err = w9968cf_sensor_update_picture(cam, cam->picture)))
2388 goto error;
2389
2390 cam->sensor_initialized = 1;
2391
2392 DBG(2, "%s image sensor initialized", symbolic(senlist, cam->sensor))
2393 return 0;
2394
2395 error:
2396 cam->sensor_initialized = 0;
2397 cam->sensor = CC_UNKNOWN;
2398 DBG(1, "Image sensor initialization failed for %s (/dev/video%d). "
2399 "Try to detach and attach this device again",
2400 symbolic(camlist, cam->id), cam->v4ldev->minor)
2401 return err;
2402 }
2403
2404
2405 /*--------------------------------------------------------------------------
2406 Fill some basic fields in the main device data structure.
2407 This function is called once on w9968cf_usb_probe() for each recognized
2408 camera.
2409 --------------------------------------------------------------------------*/
2410 static void
2411 w9968cf_configure_camera(struct w9968cf_device* cam,
2412 struct usb_device* udev,
2413 enum w9968cf_model_id mod_id,
2414 const unsigned short dev_nr)
2415 {
2416 mutex_init(&cam->fileop_mutex);
2417 init_waitqueue_head(&cam->open);
2418 spin_lock_init(&cam->urb_lock);
2419 spin_lock_init(&cam->flist_lock);
2420
2421 cam->users = 0;
2422 cam->disconnected = 0;
2423 cam->id = mod_id;
2424 cam->sensor = CC_UNKNOWN;
2425 cam->sensor_initialized = 0;
2426
2427 /* Calculate the alternate setting number (from 1 to 16)
2428 according to the 'packet_size' module parameter */
2429 if (packet_size[dev_nr] < W9968CF_MIN_PACKET_SIZE)
2430 packet_size[dev_nr] = W9968CF_MIN_PACKET_SIZE;
2431 for (cam->altsetting = 1;
2432 packet_size[dev_nr] < wMaxPacketSize[cam->altsetting-1];
2433 cam->altsetting++);
2434
2435 cam->max_buffers = (max_buffers[dev_nr] < 2 ||
2436 max_buffers[dev_nr] > W9968CF_MAX_BUFFERS)
2437 ? W9968CF_BUFFERS : (u8)max_buffers[dev_nr];
2438
2439 cam->double_buffer = (double_buffer[dev_nr] == 0 ||
2440 double_buffer[dev_nr] == 1)
2441 ? (u8)double_buffer[dev_nr]:W9968CF_DOUBLE_BUFFER;
2442
2443 cam->clamping = (clamping[dev_nr] == 0 || clamping[dev_nr] == 1)
2444 ? (u8)clamping[dev_nr] : W9968CF_CLAMPING;
2445
2446 cam->filter_type = (filter_type[dev_nr] == 0 ||
2447 filter_type[dev_nr] == 1 ||
2448 filter_type[dev_nr] == 2)
2449 ? (u8)filter_type[dev_nr] : W9968CF_FILTER_TYPE;
2450
2451 cam->capture = 1;
2452
2453 cam->largeview = (largeview[dev_nr] == 0 || largeview[dev_nr] == 1)
2454 ? (u8)largeview[dev_nr] : W9968CF_LARGEVIEW;
2455
2456 cam->decompression = (decompression[dev_nr] == 0 ||
2457 decompression[dev_nr] == 1 ||
2458 decompression[dev_nr] == 2)
2459 ? (u8)decompression[dev_nr]:W9968CF_DECOMPRESSION;
2460
2461 cam->upscaling = (upscaling[dev_nr] == 0 ||
2462 upscaling[dev_nr] == 1)
2463 ? (u8)upscaling[dev_nr] : W9968CF_UPSCALING;
2464
2465 cam->auto_brt = (autobright[dev_nr] == 0 || autobright[dev_nr] == 1)
2466 ? (u8)autobright[dev_nr] : W9968CF_AUTOBRIGHT;
2467
2468 cam->auto_exp = (autoexp[dev_nr] == 0 || autoexp[dev_nr] == 1)
2469 ? (u8)autoexp[dev_nr] : W9968CF_AUTOEXP;
2470
2471 cam->lightfreq = (lightfreq[dev_nr] == 50 || lightfreq[dev_nr] == 60)
2472 ? (u8)lightfreq[dev_nr] : W9968CF_LIGHTFREQ;
2473
2474 cam->bandfilt = (bandingfilter[dev_nr] == 0 ||
2475 bandingfilter[dev_nr] == 1)
2476 ? (u8)bandingfilter[dev_nr] : W9968CF_BANDINGFILTER;
2477
2478 cam->backlight = (backlight[dev_nr] == 0 || backlight[dev_nr] == 1)
2479 ? (u8)backlight[dev_nr] : W9968CF_BACKLIGHT;
2480
2481 cam->clockdiv = (clockdiv[dev_nr] == -1 || clockdiv[dev_nr] >= 0)
2482 ? (s8)clockdiv[dev_nr] : W9968CF_CLOCKDIV;
2483
2484 cam->mirror = (mirror[dev_nr] == 0 || mirror[dev_nr] == 1)
2485 ? (u8)mirror[dev_nr] : W9968CF_MIRROR;
2486
2487 cam->monochrome = (monochrome[dev_nr] == 0 || monochrome[dev_nr] == 1)
2488 ? monochrome[dev_nr] : W9968CF_MONOCHROME;
2489
2490 cam->picture.brightness = (u16)brightness[dev_nr];
2491 cam->picture.hue = (u16)hue[dev_nr];
2492 cam->picture.colour = (u16)colour[dev_nr];
2493 cam->picture.contrast = (u16)contrast[dev_nr];
2494 cam->picture.whiteness = (u16)whiteness[dev_nr];
2495 if (w9968cf_valid_palette((u16)force_palette[dev_nr])) {
2496 cam->picture.palette = (u16)force_palette[dev_nr];
2497 cam->force_palette = 1;
2498 } else {
2499 cam->force_palette = 0;
2500 if (cam->decompression == 0)
2501 cam->picture.palette = W9968CF_PALETTE_DECOMP_OFF;
2502 else if (cam->decompression == 1)
2503 cam->picture.palette = W9968CF_PALETTE_DECOMP_FORCE;
2504 else
2505 cam->picture.palette = W9968CF_PALETTE_DECOMP_ON;
2506 }
2507 cam->picture.depth = w9968cf_valid_depth(cam->picture.palette);
2508
2509 cam->force_rgb = (force_rgb[dev_nr] == 0 || force_rgb[dev_nr] == 1)
2510 ? (u8)force_rgb[dev_nr] : W9968CF_FORCE_RGB;
2511
2512 cam->window.x = 0;
2513 cam->window.y = 0;
2514 cam->window.width = W9968CF_WIDTH;
2515 cam->window.height = W9968CF_HEIGHT;
2516 cam->window.chromakey = 0;
2517 cam->window.clipcount = 0;
2518 cam->window.flags = 0;
2519
2520 DBG(3, "%s configured with settings #%u:",
2521 symbolic(camlist, cam->id), dev_nr)
2522
2523 DBG(3, "- Data packet size for USB isochrnous transfer: %u bytes",
2524 wMaxPacketSize[cam->altsetting-1])
2525
2526 DBG(3, "- Number of requested video frame buffers: %u",
2527 cam->max_buffers)
2528
2529 if (cam->double_buffer)
2530 DBG(3, "- Hardware double buffering enabled")
2531 else
2532 DBG(3, "- Hardware double buffering disabled")
2533
2534 if (cam->filter_type == 0)
2535 DBG(3, "- Video filtering disabled")
2536 else if (cam->filter_type == 1)
2537 DBG(3, "- Video filtering enabled: type 1-2-1")
2538 else if (cam->filter_type == 2)
2539 DBG(3, "- Video filtering enabled: type 2-3-6-3-2")
2540
2541 if (cam->clamping)
2542 DBG(3, "- Video data clamping (CCIR-601 format) enabled")
2543 else
2544 DBG(3, "- Video data clamping (CCIR-601 format) disabled")
2545
2546 if (cam->largeview)
2547 DBG(3, "- Large view enabled")
2548 else
2549 DBG(3, "- Large view disabled")
2550
2551 if ((cam->decompression) == 0 && (!cam->force_palette))
2552 DBG(3, "- Decompression disabled")
2553 else if ((cam->decompression) == 1 && (!cam->force_palette))
2554 DBG(3, "- Decompression forced")
2555 else if ((cam->decompression) == 2 && (!cam->force_palette))
2556 DBG(3, "- Decompression allowed")
2557
2558 if (cam->upscaling)
2559 DBG(3, "- Software image scaling enabled")
2560 else
2561 DBG(3, "- Software image scaling disabled")
2562
2563 if (cam->force_palette)
2564 DBG(3, "- Image palette forced to %s",
2565 symbolic(v4l1_plist, cam->picture.palette))
2566
2567 if (cam->force_rgb)
2568 DBG(3, "- RGB component ordering will be used instead of BGR")
2569
2570 if (cam->auto_brt)
2571 DBG(3, "- Auto brightness enabled")
2572 else
2573 DBG(3, "- Auto brightness disabled")
2574
2575 if (cam->auto_exp)
2576 DBG(3, "- Auto exposure enabled")
2577 else
2578 DBG(3, "- Auto exposure disabled")
2579
2580 if (cam->backlight)
2581 DBG(3, "- Backlight exposure algorithm enabled")
2582 else
2583 DBG(3, "- Backlight exposure algorithm disabled")
2584
2585 if (cam->mirror)
2586 DBG(3, "- Mirror enabled")
2587 else
2588 DBG(3, "- Mirror disabled")
2589
2590 if (cam->bandfilt)
2591 DBG(3, "- Banding filter enabled")
2592 else
2593 DBG(3, "- Banding filter disabled")
2594
2595 DBG(3, "- Power lighting frequency: %u", cam->lightfreq)
2596
2597 if (cam->clockdiv == -1)
2598 DBG(3, "- Automatic clock divisor enabled")
2599 else
2600 DBG(3, "- Clock divisor: %d", cam->clockdiv)
2601
2602 if (cam->monochrome)
2603 DBG(3, "- Image sensor used as monochrome")
2604 else
2605 DBG(3, "- Image sensor not used as monochrome")
2606 }
2607
2608
2609 /*--------------------------------------------------------------------------
2610 If the video post-processing module is not loaded, some parameters
2611 must be overridden.
2612 --------------------------------------------------------------------------*/
2613 static void w9968cf_adjust_configuration(struct w9968cf_device* cam)
2614 {
2615 if (!w9968cf_vpp) {
2616 if (cam->decompression == 1) {
2617 cam->decompression = 2;
2618 DBG(2, "Video post-processing module not found: "
2619 "'decompression' parameter forced to 2")
2620 }
2621 if (cam->upscaling) {
2622 cam->upscaling = 0;
2623 DBG(2, "Video post-processing module not found: "
2624 "'upscaling' parameter forced to 0")
2625 }
2626 if (cam->picture.palette != VIDEO_PALETTE_UYVY) {
2627 cam->force_palette = 0;
2628 DBG(2, "Video post-processing module not found: "
2629 "'force_palette' parameter forced to 0")
2630 }
2631 cam->picture.palette = VIDEO_PALETTE_UYVY;
2632 cam->picture.depth = w9968cf_valid_depth(cam->picture.palette);
2633 }
2634 }
2635
2636
2637 /*--------------------------------------------------------------------------
2638 Release the resources used by the driver.
2639 This function is called on disconnect
2640 (or on close if deallocation has been deferred)
2641 --------------------------------------------------------------------------*/
2642 static void w9968cf_release_resources(struct w9968cf_device* cam)
2643 {
2644 mutex_lock(&w9968cf_devlist_mutex);
2645
2646 DBG(2, "V4L device deregistered: /dev/video%d", cam->v4ldev->minor)
2647
2648 video_unregister_device(cam->v4ldev);
2649 list_del(&cam->v4llist);
2650 i2c_del_adapter(&cam->i2c_adapter);
2651 w9968cf_deallocate_memory(cam);
2652 kfree(cam->control_buffer);
2653 kfree(cam->data_buffer);
2654
2655 mutex_unlock(&w9968cf_devlist_mutex);
2656 }
2657
2658
2659
2660 /****************************************************************************
2661 * Video4Linux interface *
2662 ****************************************************************************/
2663
2664 static int w9968cf_open(struct inode* inode, struct file* filp)
2665 {
2666 struct w9968cf_device* cam;
2667 int err;
2668
2669 /* This the only safe way to prevent race conditions with disconnect */
2670 if (!down_read_trylock(&w9968cf_disconnect))
2671 return -EAGAIN;
2672
2673 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2674
2675 mutex_lock(&cam->dev_mutex);
2676
2677 if (cam->sensor == CC_UNKNOWN) {
2678 DBG(2, "No supported image sensor has been detected by the "
2679 "'ovcamchip' module for the %s (/dev/video%d). Make "
2680 "sure it is loaded *before* (re)connecting the camera.",
2681 symbolic(camlist, cam->id), cam->v4ldev->minor)
2682 mutex_unlock(&cam->dev_mutex);
2683 up_read(&w9968cf_disconnect);
2684 return -ENODEV;
2685 }
2686
2687 if (cam->users) {
2688 DBG(2, "%s (/dev/video%d) has been already occupied by '%s'",
2689 symbolic(camlist, cam->id),cam->v4ldev->minor,cam->command)
2690 if ((filp->f_flags & O_NONBLOCK)||(filp->f_flags & O_NDELAY)) {
2691 mutex_unlock(&cam->dev_mutex);
2692 up_read(&w9968cf_disconnect);
2693 return -EWOULDBLOCK;
2694 }
2695 mutex_unlock(&cam->dev_mutex);
2696 err = wait_event_interruptible_exclusive(cam->open,
2697 cam->disconnected ||
2698 !cam->users);
2699 if (err) {
2700 up_read(&w9968cf_disconnect);
2701 return err;
2702 }
2703 if (cam->disconnected) {
2704 up_read(&w9968cf_disconnect);
2705 return -ENODEV;
2706 }
2707 mutex_lock(&cam->dev_mutex);
2708 }
2709
2710 DBG(5, "Opening '%s', /dev/video%d ...",
2711 symbolic(camlist, cam->id), cam->v4ldev->minor)
2712
2713 cam->streaming = 0;
2714 cam->misconfigured = 0;
2715
2716 w9968cf_adjust_configuration(cam);
2717
2718 if ((err = w9968cf_allocate_memory(cam)))
2719 goto deallocate_memory;
2720
2721 if ((err = w9968cf_init_chip(cam)))
2722 goto deallocate_memory;
2723
2724 if ((err = w9968cf_start_transfer(cam)))
2725 goto deallocate_memory;
2726
2727 filp->private_data = cam;
2728
2729 cam->users++;
2730 strcpy(cam->command, current->comm);
2731
2732 init_waitqueue_head(&cam->wait_queue);
2733
2734 DBG(5, "Video device is open")
2735
2736 mutex_unlock(&cam->dev_mutex);
2737 up_read(&w9968cf_disconnect);
2738
2739 return 0;
2740
2741 deallocate_memory:
2742 w9968cf_deallocate_memory(cam);
2743 DBG(2, "Failed to open the video device")
2744 mutex_unlock(&cam->dev_mutex);
2745 up_read(&w9968cf_disconnect);
2746 return err;
2747 }
2748
2749
2750 static int w9968cf_release(struct inode* inode, struct file* filp)
2751 {
2752 struct w9968cf_device* cam;
2753
2754 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2755
2756 mutex_lock(&cam->dev_mutex); /* prevent disconnect() to be called */
2757
2758 w9968cf_stop_transfer(cam);
2759
2760 if (cam->disconnected) {
2761 w9968cf_release_resources(cam);
2762 mutex_unlock(&cam->dev_mutex);
2763 kfree(cam);
2764 return 0;
2765 }
2766
2767 cam->users--;
2768 w9968cf_deallocate_memory(cam);
2769 wake_up_interruptible_nr(&cam->open, 1);
2770
2771 DBG(5, "Video device closed")
2772 mutex_unlock(&cam->dev_mutex);
2773 return 0;
2774 }
2775
2776
2777 static ssize_t
2778 w9968cf_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
2779 {
2780 struct w9968cf_device* cam;
2781 struct w9968cf_frame_t* fr;
2782 int err = 0;
2783
2784 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2785
2786 if (filp->f_flags & O_NONBLOCK)
2787 return -EWOULDBLOCK;
2788
2789 if (mutex_lock_interruptible(&cam->fileop_mutex))
2790 return -ERESTARTSYS;
2791
2792 if (cam->disconnected) {
2793 DBG(2, "Device not present")
2794 mutex_unlock(&cam->fileop_mutex);
2795 return -ENODEV;
2796 }
2797
2798 if (cam->misconfigured) {
2799 DBG(2, "The camera is misconfigured. Close and open it again.")
2800 mutex_unlock(&cam->fileop_mutex);
2801 return -EIO;
2802 }
2803
2804 if (!cam->frame[0].queued)
2805 w9968cf_push_frame(cam, 0);
2806
2807 if (!cam->frame[1].queued)
2808 w9968cf_push_frame(cam, 1);
2809
2810 err = wait_event_interruptible(cam->wait_queue,
2811 cam->frame[0].status == F_READY ||
2812 cam->frame[1].status == F_READY ||
2813 cam->disconnected);
2814 if (err) {
2815 mutex_unlock(&cam->fileop_mutex);
2816 return err;
2817 }
2818 if (cam->disconnected) {
2819 mutex_unlock(&cam->fileop_mutex);
2820 return -ENODEV;
2821 }
2822
2823 fr = (cam->frame[0].status == F_READY) ? &cam->frame[0]:&cam->frame[1];
2824
2825 if (w9968cf_vpp)
2826 w9968cf_postprocess_frame(cam, fr);
2827
2828 if (count > fr->length)
2829 count = fr->length;
2830
2831 if (copy_to_user(buf, fr->buffer, count)) {
2832 fr->status = F_UNUSED;
2833 mutex_unlock(&cam->fileop_mutex);
2834 return -EFAULT;
2835 }
2836 *f_pos += count;
2837
2838 fr->status = F_UNUSED;
2839
2840 DBG(5, "%zu bytes read", count)
2841
2842 mutex_unlock(&cam->fileop_mutex);
2843 return count;
2844 }
2845
2846
2847 static int w9968cf_mmap(struct file* filp, struct vm_area_struct *vma)
2848 {
2849 struct w9968cf_device* cam = (struct w9968cf_device*)
2850 video_get_drvdata(video_devdata(filp));
2851 unsigned long vsize = vma->vm_end - vma->vm_start,
2852 psize = cam->nbuffers * cam->frame[0].size,
2853 start = vma->vm_start,
2854 pos = (unsigned long)cam->frame[0].buffer,
2855 page;
2856
2857 if (cam->disconnected) {
2858 DBG(2, "Device not present")
2859 return -ENODEV;
2860 }
2861
2862 if (cam->misconfigured) {
2863 DBG(2, "The camera is misconfigured. Close and open it again")
2864 return -EIO;
2865 }
2866
2867 PDBGG("mmapping %lu bytes...", vsize)
2868
2869 if (vsize > psize - (vma->vm_pgoff << PAGE_SHIFT))
2870 return -EINVAL;
2871
2872 while (vsize > 0) {
2873 page = vmalloc_to_pfn((void *)pos);
2874 if (remap_pfn_range(vma, start, page + vma->vm_pgoff,
2875 PAGE_SIZE, vma->vm_page_prot))
2876 return -EAGAIN;
2877 start += PAGE_SIZE;
2878 pos += PAGE_SIZE;
2879 vsize -= PAGE_SIZE;
2880 }
2881
2882 DBG(5, "mmap method successfully called")
2883 return 0;
2884 }
2885
2886
2887 static int
2888 w9968cf_ioctl(struct inode* inode, struct file* filp,
2889 unsigned int cmd, unsigned long arg)
2890 {
2891 struct w9968cf_device* cam;
2892 int err;
2893
2894 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2895
2896 if (mutex_lock_interruptible(&cam->fileop_mutex))
2897 return -ERESTARTSYS;
2898
2899 if (cam->disconnected) {
2900 DBG(2, "Device not present")
2901 mutex_unlock(&cam->fileop_mutex);
2902 return -ENODEV;
2903 }
2904
2905 if (cam->misconfigured) {
2906 DBG(2, "The camera is misconfigured. Close and open it again.")
2907 mutex_unlock(&cam->fileop_mutex);
2908 return -EIO;
2909 }
2910
2911 err = w9968cf_v4l_ioctl(inode, filp, cmd, (void __user *)arg);
2912
2913 mutex_unlock(&cam->fileop_mutex);
2914 return err;
2915 }
2916
2917
2918 static int w9968cf_v4l_ioctl(struct inode* inode, struct file* filp,
2919 unsigned int cmd, void __user * arg)
2920 {
2921 struct w9968cf_device* cam;
2922 const char* v4l1_ioctls[] = {
2923 "?", "CGAP", "GCHAN", "SCHAN", "GTUNER", "STUNER",
2924 "GPICT", "SPICT", "CCAPTURE", "GWIN", "SWIN", "GFBUF",
2925 "SFBUF", "KEY", "GFREQ", "SFREQ", "GAUDIO", "SAUDIO",
2926 "SYNC", "MCAPTURE", "GMBUF", "GUNIT", "GCAPTURE", "SCAPTURE",
2927 "SPLAYMODE", "SWRITEMODE", "GPLAYINFO", "SMICROCODE",
2928 "GVBIFMT", "SVBIFMT"
2929 };
2930
2931 #define V4L1_IOCTL(cmd) \
2932 ((_IOC_NR((cmd)) < ARRAY_SIZE(v4l1_ioctls)) ? \
2933 v4l1_ioctls[_IOC_NR((cmd))] : "?")
2934
2935 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2936
2937 switch (cmd) {
2938
2939 case VIDIOCGCAP: /* get video capability */
2940 {
2941 struct video_capability cap = {
2942 .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
2943 .channels = 1,
2944 .audios = 0,
2945 .minwidth = cam->minwidth,
2946 .minheight = cam->minheight,
2947 };
2948 sprintf(cap.name, "W996[87]CF USB Camera #%d",
2949 cam->v4ldev->minor);
2950 cap.maxwidth = (cam->upscaling && w9968cf_vpp)
2951 ? max((u16)W9968CF_MAX_WIDTH, cam->maxwidth)
2952 : cam->maxwidth;
2953 cap.maxheight = (cam->upscaling && w9968cf_vpp)
2954 ? max((u16)W9968CF_MAX_HEIGHT, cam->maxheight)
2955 : cam->maxheight;
2956
2957 if (copy_to_user(arg, &cap, sizeof(cap)))
2958 return -EFAULT;
2959
2960 DBG(5, "VIDIOCGCAP successfully called")
2961 return 0;
2962 }
2963
2964 case VIDIOCGCHAN: /* get video channel informations */
2965 {
2966 struct video_channel chan;
2967 if (copy_from_user(&chan, arg, sizeof(chan)))
2968 return -EFAULT;
2969
2970 if (chan.channel != 0)
2971 return -EINVAL;
2972
2973 strcpy(chan.name, "Camera");
2974 chan.tuners = 0;
2975 chan.flags = 0;
2976 chan.type = VIDEO_TYPE_CAMERA;
2977 chan.norm = VIDEO_MODE_AUTO;
2978
2979 if (copy_to_user(arg, &chan, sizeof(chan)))
2980 return -EFAULT;
2981
2982 DBG(5, "VIDIOCGCHAN successfully called")
2983 return 0;
2984 }
2985
2986 case VIDIOCSCHAN: /* set active channel */
2987 {
2988 struct video_channel chan;
2989
2990 if (copy_from_user(&chan, arg, sizeof(chan)))
2991 return -EFAULT;
2992
2993 if (chan.channel != 0)
2994 return -EINVAL;
2995
2996 DBG(5, "VIDIOCSCHAN successfully called")
2997 return 0;
2998 }
2999
3000 case VIDIOCGPICT: /* get image properties of the picture */
3001 {
3002 if (w9968cf_sensor_get_picture(cam))
3003 return -EIO;
3004
3005 if (copy_to_user(arg, &cam->picture, sizeof(cam->picture)))
3006 return -EFAULT;
3007
3008 DBG(5, "VIDIOCGPICT successfully called")
3009 return 0;
3010 }
3011
3012 case VIDIOCSPICT: /* change picture settings */
3013 {
3014 struct video_picture pict;
3015 int err = 0;
3016
3017 if (copy_from_user(&pict, arg, sizeof(pict)))
3018 return -EFAULT;
3019
3020 if ( (cam->force_palette || !w9968cf_vpp)
3021 && pict.palette != cam->picture.palette ) {
3022 DBG(4, "Palette %s rejected: only %s is allowed",
3023 symbolic(v4l1_plist, pict.palette),
3024 symbolic(v4l1_plist, cam->picture.palette))
3025 return -EINVAL;
3026 }
3027
3028 if (!w9968cf_valid_palette(pict.palette)) {
3029 DBG(4, "Palette %s not supported. VIDIOCSPICT failed",
3030 symbolic(v4l1_plist, pict.palette))
3031 return -EINVAL;
3032 }
3033
3034 if (!cam->force_palette) {
3035 if (cam->decompression == 0) {
3036 if (w9968cf_need_decompression(pict.palette)) {
3037 DBG(4, "Decompression disabled: palette %s is not "
3038 "allowed. VIDIOCSPICT failed",
3039 symbolic(v4l1_plist, pict.palette))
3040 return -EINVAL;
3041 }
3042 } else if (cam->decompression == 1) {
3043 if (!w9968cf_need_decompression(pict.palette)) {
3044 DBG(4, "Decompression forced: palette %s is not "
3045 "allowed. VIDIOCSPICT failed",
3046 symbolic(v4l1_plist, pict.palette))
3047 return -EINVAL;
3048 }
3049 }
3050 }
3051
3052 if (pict.depth != w9968cf_valid_depth(pict.palette)) {
3053 DBG(4, "Requested depth %u bpp is not valid for %s "
3054 "palette: ignored and changed to %u bpp",
3055 pict.depth, symbolic(v4l1_plist, pict.palette),
3056 w9968cf_valid_depth(pict.palette))
3057 pict.depth = w9968cf_valid_depth(pict.palette);
3058 }
3059
3060 if (pict.palette != cam->picture.palette) {
3061 if(*cam->requested_frame
3062 || cam->frame_current->queued) {
3063 err = wait_event_interruptible
3064 ( cam->wait_queue,
3065 cam->disconnected ||
3066 (!*cam->requested_frame &&
3067 !cam->frame_current->queued) );
3068 if (err)
3069 return err;
3070 if (cam->disconnected)
3071 return -ENODEV;
3072 }
3073
3074 if (w9968cf_stop_transfer(cam))
3075 goto ioctl_fail;
3076
3077 if (w9968cf_set_picture(cam, pict))
3078 goto ioctl_fail;
3079
3080 if (w9968cf_start_transfer(cam))
3081 goto ioctl_fail;
3082
3083 } else if (w9968cf_sensor_update_picture(cam, pict))
3084 return -EIO;
3085
3086
3087 DBG(5, "VIDIOCSPICT successfully called")
3088 return 0;
3089 }
3090
3091 case VIDIOCSWIN: /* set capture area */
3092 {
3093 struct video_window win;
3094 int err = 0;
3095
3096 if (copy_from_user(&win, arg, sizeof(win)))
3097 return -EFAULT;
3098
3099 DBG(6, "VIDIOCSWIN called: clipcount=%d, flags=%u, "
3100 "x=%u, y=%u, %ux%u", win.clipcount, win.flags,
3101 win.x, win.y, win.width, win.height)
3102
3103 if (win.clipcount != 0 || win.flags != 0)
3104 return -EINVAL;
3105
3106 if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width,
3107 (u16*)&win.height))) {
3108 DBG(4, "Resolution not supported (%ux%u). "
3109 "VIDIOCSWIN failed", win.width, win.height)
3110 return err;
3111 }
3112
3113 if (win.x != cam->window.x ||
3114 win.y != cam->window.y ||
3115 win.width != cam->window.width ||
3116 win.height != cam->window.height) {
3117 if(*cam->requested_frame
3118 || cam->frame_current->queued) {
3119 err = wait_event_interruptible
3120 ( cam->wait_queue,
3121 cam->disconnected ||
3122 (!*cam->requested_frame &&
3123 !cam->frame_current->queued) );
3124 if (err)
3125 return err;
3126 if (cam->disconnected)
3127 return -ENODEV;
3128 }
3129
3130 if (w9968cf_stop_transfer(cam))
3131 goto ioctl_fail;
3132
3133 /* This _must_ be called before set_window() */
3134 if (w9968cf_set_picture(cam, cam->picture))
3135 goto ioctl_fail;
3136
3137 if (w9968cf_set_window(cam, win))
3138 goto ioctl_fail;
3139
3140 if (w9968cf_start_transfer(cam))
3141 goto ioctl_fail;
3142 }
3143
3144 DBG(5, "VIDIOCSWIN successfully called. ")
3145 return 0;
3146 }
3147
3148 case VIDIOCGWIN: /* get current window properties */
3149 {
3150 if (copy_to_user(arg,&cam->window,sizeof(struct video_window)))
3151 return -EFAULT;
3152
3153 DBG(5, "VIDIOCGWIN successfully called")
3154 return 0;
3155 }
3156
3157 case VIDIOCGMBUF: /* request for memory (mapped) buffer */
3158 {
3159 struct video_mbuf mbuf;
3160 u8 i;
3161
3162 mbuf.size = cam->nbuffers * cam->frame[0].size;
3163 mbuf.frames = cam->nbuffers;
3164 for (i = 0; i < cam->nbuffers; i++)
3165 mbuf.offsets[i] = (unsigned long)cam->frame[i].buffer -
3166 (unsigned long)cam->frame[0].buffer;
3167
3168 if (copy_to_user(arg, &mbuf, sizeof(mbuf)))
3169 return -EFAULT;
3170
3171 DBG(5, "VIDIOCGMBUF successfully called")
3172 return 0;
3173 }
3174
3175 case VIDIOCMCAPTURE: /* start the capture to a frame */
3176 {
3177 struct video_mmap mmap;
3178 struct w9968cf_frame_t* fr;
3179 int err = 0;
3180
3181 if (copy_from_user(&mmap, arg, sizeof(mmap)))
3182 return -EFAULT;
3183
3184 DBG(6, "VIDIOCMCAPTURE called: frame #%u, format=%s, %dx%d",
3185 mmap.frame, symbolic(v4l1_plist, mmap.format),
3186 mmap.width, mmap.height)
3187
3188 if (mmap.frame >= cam->nbuffers) {
3189 DBG(4, "Invalid frame number (%u). "
3190 "VIDIOCMCAPTURE failed", mmap.frame)
3191 return -EINVAL;
3192 }
3193
3194 if (mmap.format!=cam->picture.palette &&
3195 (cam->force_palette || !w9968cf_vpp)) {
3196 DBG(4, "Palette %s rejected: only %s is allowed",
3197 symbolic(v4l1_plist, mmap.format),
3198 symbolic(v4l1_plist, cam->picture.palette))
3199 return -EINVAL;
3200 }
3201
3202 if (!w9968cf_valid_palette(mmap.format)) {
3203 DBG(4, "Palette %s not supported. "
3204 "VIDIOCMCAPTURE failed",
3205 symbolic(v4l1_plist, mmap.format))
3206 return -EINVAL;
3207 }
3208
3209 if (!cam->force_palette) {
3210 if (cam->decompression == 0) {
3211 if (w9968cf_need_decompression(mmap.format)) {
3212 DBG(4, "Decompression disabled: palette %s is not "
3213 "allowed. VIDIOCSPICT failed",
3214 symbolic(v4l1_plist, mmap.format))
3215 return -EINVAL;
3216 }
3217 } else if (cam->decompression == 1) {
3218 if (!w9968cf_need_decompression(mmap.format)) {
3219 DBG(4, "Decompression forced: palette %s is not "
3220 "allowed. VIDIOCSPICT failed",
3221 symbolic(v4l1_plist, mmap.format))
3222 return -EINVAL;
3223 }
3224 }
3225 }
3226
3227 if ((err = w9968cf_adjust_window_size(cam, (u16*)&mmap.width,
3228 (u16*)&mmap.height))) {
3229 DBG(4, "Resolution not supported (%dx%d). "
3230 "VIDIOCMCAPTURE failed",
3231 mmap.width, mmap.height)
3232 return err;
3233 }
3234
3235 fr = &cam->frame[mmap.frame];
3236
3237 if (mmap.width != cam->window.width ||
3238 mmap.height != cam->window.height ||
3239 mmap.format != cam->picture.palette) {
3240
3241 struct video_window win;
3242 struct video_picture pict;
3243
3244 if(*cam->requested_frame
3245 || cam->frame_current->queued) {
3246 DBG(6, "VIDIOCMCAPTURE. Change settings for "
3247 "frame #%u: %dx%d, format %s. Wait...",
3248 mmap.frame, mmap.width, mmap.height,
3249 symbolic(v4l1_plist, mmap.format))
3250 err = wait_event_interruptible
3251 ( cam->wait_queue,
3252 cam->disconnected ||
3253 (!*cam->requested_frame &&
3254 !cam->frame_current->queued) );
3255 if (err)
3256 return err;
3257 if (cam->disconnected)
3258 return -ENODEV;
3259 }
3260
3261 memcpy(&win, &cam->window, sizeof(win));
3262 memcpy(&pict, &cam->picture, sizeof(pict));
3263 win.width = mmap.width;
3264 win.height = mmap.height;
3265 pict.palette = mmap.format;
3266
3267 if (w9968cf_stop_transfer(cam))
3268 goto ioctl_fail;
3269
3270 /* This before set_window */
3271 if (w9968cf_set_picture(cam, pict))
3272 goto ioctl_fail;
3273
3274 if (w9968cf_set_window(cam, win))
3275 goto ioctl_fail;
3276
3277 if (w9968cf_start_transfer(cam))
3278 goto ioctl_fail;
3279
3280 } else if (fr->queued) {
3281
3282 DBG(6, "Wait until frame #%u is free", mmap.frame)
3283
3284 err = wait_event_interruptible(cam->wait_queue,
3285 cam->disconnected ||
3286 (!fr->queued));
3287 if (err)
3288 return err;
3289 if (cam->disconnected)
3290 return -ENODEV;
3291 }
3292
3293 w9968cf_push_frame(cam, mmap.frame);
3294 DBG(5, "VIDIOCMCAPTURE(%u): successfully called", mmap.frame)
3295 return 0;
3296 }
3297
3298 case VIDIOCSYNC: /* wait until the capture of a frame is finished */
3299 {
3300 unsigned int f_num;
3301 struct w9968cf_frame_t* fr;
3302 int err = 0;
3303
3304 if (copy_from_user(&f_num, arg, sizeof(f_num)))
3305 return -EFAULT;
3306
3307 if (f_num >= cam->nbuffers) {
3308 DBG(4, "Invalid frame number (%u). "
3309 "VIDIOCMCAPTURE failed", f_num)
3310 return -EINVAL;
3311 }
3312
3313 DBG(6, "VIDIOCSYNC called for frame #%u", f_num)
3314
3315 fr = &cam->frame[f_num];
3316
3317 switch (fr->status) {
3318 case F_UNUSED:
3319 if (!fr->queued) {
3320 DBG(4, "VIDIOSYNC: Frame #%u not requested!",
3321 f_num)
3322 return -EFAULT;
3323 }
3324 case F_ERROR:
3325 case F_GRABBING:
3326 err = wait_event_interruptible(cam->wait_queue,
3327 (fr->status == F_READY)
3328 || cam->disconnected);
3329 if (err)
3330 return err;
3331 if (cam->disconnected)
3332 return -ENODEV;
3333 break;
3334 case F_READY:
3335 break;
3336 }
3337
3338 if (w9968cf_vpp)
3339 w9968cf_postprocess_frame(cam, fr);
3340
3341 fr->status = F_UNUSED;
3342
3343 DBG(5, "VIDIOCSYNC(%u) successfully called", f_num)
3344 return 0;
3345 }
3346
3347 case VIDIOCGUNIT:/* report the unit numbers of the associated devices*/
3348 {
3349 struct video_unit unit = {
3350 .video = cam->v4ldev->minor,
3351 .vbi = VIDEO_NO_UNIT,
3352 .radio = VIDEO_NO_UNIT,
3353 .audio = VIDEO_NO_UNIT,
3354 .teletext = VIDEO_NO_UNIT,
3355 };
3356
3357 if (copy_to_user(arg, &unit, sizeof(unit)))
3358 return -EFAULT;
3359
3360 DBG(5, "VIDIOCGUNIT successfully called")
3361 return 0;
3362 }
3363
3364 case VIDIOCKEY:
3365 return 0;
3366
3367 case VIDIOCGFBUF:
3368 {
3369 if (clear_user(arg, sizeof(struct video_buffer)))
3370 return -EFAULT;
3371
3372 DBG(5, "VIDIOCGFBUF successfully called")
3373 return 0;
3374 }
3375
3376 case VIDIOCGTUNER:
3377 {
3378 struct video_tuner tuner;
3379 if (copy_from_user(&tuner, arg, sizeof(tuner)))
3380 return -EFAULT;
3381
3382 if (tuner.tuner != 0)
3383 return -EINVAL;
3384
3385 strcpy(tuner.name, "no_tuner");
3386 tuner.rangelow = 0;
3387 tuner.rangehigh = 0;
3388 tuner.flags = VIDEO_TUNER_NORM;
3389 tuner.mode = VIDEO_MODE_AUTO;
3390 tuner.signal = 0xffff;
3391
3392 if (copy_to_user(arg, &tuner, sizeof(tuner)))
3393 return -EFAULT;
3394
3395 DBG(5, "VIDIOCGTUNER successfully called")
3396 return 0;
3397 }
3398
3399 case VIDIOCSTUNER:
3400 {
3401 struct video_tuner tuner;
3402 if (copy_from_user(&tuner, arg, sizeof(tuner)))
3403 return -EFAULT;
3404
3405 if (tuner.tuner != 0)
3406 return -EINVAL;
3407
3408 if (tuner.mode != VIDEO_MODE_AUTO)
3409 return -EINVAL;
3410
3411 DBG(5, "VIDIOCSTUNER successfully called")
3412 return 0;
3413 }
3414
3415 case VIDIOCSFBUF:
3416 case VIDIOCCAPTURE:
3417 case VIDIOCGFREQ:
3418 case VIDIOCSFREQ:
3419 case VIDIOCGAUDIO:
3420 case VIDIOCSAUDIO:
3421 case VIDIOCSPLAYMODE:
3422 case VIDIOCSWRITEMODE:
3423 case VIDIOCGPLAYINFO:
3424 case VIDIOCSMICROCODE:
3425 case VIDIOCGVBIFMT:
3426 case VIDIOCSVBIFMT:
3427 DBG(4, "Unsupported V4L1 IOCtl: VIDIOC%s "
3428 "(type 0x%01X, "
3429 "n. 0x%01X, "
3430 "dir. 0x%01X, "
3431 "size 0x%02X)",
3432 V4L1_IOCTL(cmd),
3433 _IOC_TYPE(cmd),_IOC_NR(cmd),_IOC_DIR(cmd),_IOC_SIZE(cmd))
3434
3435 return -EINVAL;
3436
3437 default:
3438 DBG(4, "Invalid V4L1 IOCtl: VIDIOC%s "
3439 "type 0x%01X, "
3440 "n. 0x%01X, "
3441 "dir. 0x%01X, "
3442 "size 0x%02X",
3443 V4L1_IOCTL(cmd),
3444 _IOC_TYPE(cmd),_IOC_NR(cmd),_IOC_DIR(cmd),_IOC_SIZE(cmd))
3445
3446 return -ENOIOCTLCMD;
3447
3448 } /* end of switch */
3449
3450 ioctl_fail:
3451 cam->misconfigured = 1;
3452 DBG(1, "VIDIOC%s failed because of hardware problems. "
3453 "To use the camera, close and open it again.", V4L1_IOCTL(cmd))
3454 return -EFAULT;
3455 }
3456
3457
3458 static const struct file_operations w9968cf_fops = {
3459 .owner = THIS_MODULE,
3460 .open = w9968cf_open,
3461 .release = w9968cf_release,
3462 .read = w9968cf_read,
3463 .ioctl = w9968cf_ioctl,
3464 #ifdef CONFIG_COMPAT
3465 .compat_ioctl = v4l_compat_ioctl32,
3466 #endif
3467 .mmap = w9968cf_mmap,
3468 .llseek = no_llseek,
3469 };
3470
3471
3472
3473 /****************************************************************************
3474 * USB probe and V4L registration, disconnect and id_table[] definition *
3475 ****************************************************************************/
3476
3477 static int
3478 w9968cf_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
3479 {
3480 struct usb_device *udev = interface_to_usbdev(intf);
3481 struct w9968cf_device* cam;
3482 int err = 0;
3483 enum w9968cf_model_id mod_id;
3484 struct list_head* ptr;
3485 u8 sc = 0; /* number of simultaneous cameras */
3486 static unsigned short dev_nr; /* 0 - we are handling device number n */
3487
3488 if (le16_to_cpu(udev->descriptor.idVendor) == winbond_id_table[0].idVendor &&
3489 le16_to_cpu(udev->descriptor.idProduct) == winbond_id_table[0].idProduct)
3490 mod_id = W9968CF_MOD_CLVBWGP; /* see camlist[] table */
3491 else if (le16_to_cpu(udev->descriptor.idVendor) == winbond_id_table[1].idVendor &&
3492 le16_to_cpu(udev->descriptor.idProduct) == winbond_id_table[1].idProduct)
3493 mod_id = W9968CF_MOD_GENERIC; /* see camlist[] table */
3494 else
3495 return -ENODEV;
3496
3497 cam = (struct w9968cf_device*)
3498 kzalloc(sizeof(struct w9968cf_device), GFP_KERNEL);
3499 if (!cam)
3500 return -ENOMEM;
3501
3502 mutex_init(&cam->dev_mutex);
3503 mutex_lock(&cam->dev_mutex);
3504
3505 cam->usbdev = udev;
3506 /* NOTE: a local copy is used to avoid possible race conditions */
3507 memcpy(&cam->dev, &udev->dev, sizeof(struct device));
3508
3509 DBG(2, "%s detected", symbolic(camlist, mod_id))
3510
3511 if (simcams > W9968CF_MAX_DEVICES)
3512 simcams = W9968CF_SIMCAMS;
3513
3514 /* How many cameras are connected ? */
3515 mutex_lock(&w9968cf_devlist_mutex);
3516 list_for_each(ptr, &w9968cf_dev_list)
3517 sc++;
3518 mutex_unlock(&w9968cf_devlist_mutex);
3519
3520 if (sc >= simcams) {
3521 DBG(2, "Device rejected: too many connected cameras "
3522 "(max. %u)", simcams)
3523 err = -EPERM;
3524 goto fail;
3525 }
3526
3527
3528 /* Allocate 2 bytes of memory for camera control USB transfers */
3529 if (!(cam->control_buffer = kzalloc(2, GFP_KERNEL))) {
3530 DBG(1,"Couldn't allocate memory for camera control transfers")
3531 err = -ENOMEM;
3532 goto fail;
3533 }
3534
3535 /* Allocate 8 bytes of memory for USB data transfers to the FSB */
3536 if (!(cam->data_buffer = kzalloc(8, GFP_KERNEL))) {
3537 DBG(1, "Couldn't allocate memory for data "
3538 "transfers to the FSB")
3539 err = -ENOMEM;
3540 goto fail;
3541 }
3542
3543 /* Register the V4L device */
3544 cam->v4ldev = video_device_alloc();
3545 if (!cam->v4ldev) {
3546 DBG(1, "Could not allocate memory for a V4L structure")
3547 err = -ENOMEM;
3548 goto fail;
3549 }
3550
3551 strcpy(cam->v4ldev->name, symbolic(camlist, mod_id));
3552 cam->v4ldev->owner = THIS_MODULE;
3553 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
3554 cam->v4ldev->fops = &w9968cf_fops;
3555 cam->v4ldev->minor = video_nr[dev_nr];
3556 cam->v4ldev->release = video_device_release;
3557 video_set_drvdata(cam->v4ldev, cam);
3558 cam->v4ldev->parent = &cam->dev;
3559
3560 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
3561 video_nr[dev_nr]);
3562 if (err) {
3563 DBG(1, "V4L device registration failed")
3564 if (err == -ENFILE && video_nr[dev_nr] == -1)
3565 DBG(2, "Couldn't find a free /dev/videoX node")
3566 video_nr[dev_nr] = -1;
3567 dev_nr = (dev_nr < W9968CF_MAX_DEVICES-1) ? dev_nr+1 : 0;
3568 goto fail;
3569 }
3570
3571 DBG(2, "V4L device registered as /dev/video%d", cam->v4ldev->minor)
3572
3573 /* Set some basic constants */
3574 w9968cf_configure_camera(cam, udev, mod_id, dev_nr);
3575
3576 /* Add a new entry into the list of V4L registered devices */
3577 mutex_lock(&w9968cf_devlist_mutex);
3578 list_add(&cam->v4llist, &w9968cf_dev_list);
3579 mutex_unlock(&w9968cf_devlist_mutex);
3580 dev_nr = (dev_nr < W9968CF_MAX_DEVICES-1) ? dev_nr+1 : 0;
3581
3582 w9968cf_turn_on_led(cam);
3583
3584 w9968cf_i2c_init(cam);
3585
3586 usb_set_intfdata(intf, cam);
3587 mutex_unlock(&cam->dev_mutex);
3588 return 0;
3589
3590 fail: /* Free unused memory */
3591 kfree(cam->control_buffer);
3592 kfree(cam->data_buffer);
3593 if (cam->v4ldev)
3594 video_device_release(cam->v4ldev);
3595 mutex_unlock(&cam->dev_mutex);
3596 kfree(cam);
3597 return err;
3598 }
3599
3600
3601 static void w9968cf_usb_disconnect(struct usb_interface* intf)
3602 {
3603 struct w9968cf_device* cam =
3604 (struct w9968cf_device*)usb_get_intfdata(intf);
3605
3606 down_write(&w9968cf_disconnect);
3607
3608 if (cam) {
3609 /* Prevent concurrent accesses to data */
3610 mutex_lock(&cam->dev_mutex);
3611
3612 cam->disconnected = 1;
3613
3614 DBG(2, "Disconnecting %s...", symbolic(camlist, cam->id))
3615
3616 wake_up_interruptible_all(&cam->open);
3617
3618 if (cam->users) {
3619 DBG(2, "The device is open (/dev/video%d)! "
3620 "Process name: %s. Deregistration and memory "
3621 "deallocation are deferred on close.",
3622 cam->v4ldev->minor, cam->command)
3623 cam->misconfigured = 1;
3624 w9968cf_stop_transfer(cam);
3625 wake_up_interruptible(&cam->wait_queue);
3626 } else
3627 w9968cf_release_resources(cam);
3628
3629 mutex_unlock(&cam->dev_mutex);
3630
3631 if (!cam->users)
3632 kfree(cam);
3633 }
3634
3635 up_write(&w9968cf_disconnect);
3636 }
3637
3638
3639 static struct usb_driver w9968cf_usb_driver = {
3640 .name = "w9968cf",
3641 .id_table = winbond_id_table,
3642 .probe = w9968cf_usb_probe,
3643 .disconnect = w9968cf_usb_disconnect,
3644 };
3645
3646
3647
3648 /****************************************************************************
3649 * Module init, exit and intermodule communication *
3650 ****************************************************************************/
3651
3652 static int __init w9968cf_module_init(void)
3653 {
3654 int err;
3655
3656 KDBG(2, W9968CF_MODULE_NAME" "W9968CF_MODULE_VERSION)
3657 KDBG(3, W9968CF_MODULE_AUTHOR)
3658
3659 if (ovmod_load)
3660 request_module("ovcamchip");
3661
3662 if ((err = usb_register(&w9968cf_usb_driver)))
3663 return err;
3664
3665 return 0;
3666 }
3667
3668
3669 static void __exit w9968cf_module_exit(void)
3670 {
3671 /* w9968cf_usb_disconnect() will be called */
3672 usb_deregister(&w9968cf_usb_driver);
3673
3674 KDBG(2, W9968CF_MODULE_NAME" deregistered")
3675 }
3676
3677
3678 module_init(w9968cf_module_init);
3679 module_exit(w9968cf_module_exit);
3680
Support for the Chinese Samsung S3C2440 based development boards