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[PATCH] i2c: Drop i2c_driver.{owner,name}, 5 of 11
[deliverable/linux.git] / drivers / usb / media / w9968cf.c
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 #include <linux/moduleparam.h>
46
47 #include "w9968cf.h"
48 #include "w9968cf_decoder.h"
49
50
51
52 /****************************************************************************
53 * Module macros and parameters *
54 ****************************************************************************/
55
56 MODULE_DEVICE_TABLE(usb, winbond_id_table);
57
58 MODULE_AUTHOR(W9968CF_MODULE_AUTHOR" "W9968CF_AUTHOR_EMAIL);
59 MODULE_DESCRIPTION(W9968CF_MODULE_NAME);
60 MODULE_VERSION(W9968CF_MODULE_VERSION);
61 MODULE_LICENSE(W9968CF_MODULE_LICENSE);
62 MODULE_SUPPORTED_DEVICE("Video");
63
64 static int ovmod_load = W9968CF_OVMOD_LOAD;
65 static int vppmod_load = W9968CF_VPPMOD_LOAD;
66 static unsigned short simcams = W9968CF_SIMCAMS;
67 static short video_nr[]={[0 ... W9968CF_MAX_DEVICES-1] = -1}; /*-1=first free*/
68 static unsigned int packet_size[] = {[0 ... W9968CF_MAX_DEVICES-1] =
69 W9968CF_PACKET_SIZE};
70 static unsigned short max_buffers[] = {[0 ... W9968CF_MAX_DEVICES-1] =
71 W9968CF_BUFFERS};
72 static int double_buffer[] = {[0 ... W9968CF_MAX_DEVICES-1] =
73 W9968CF_DOUBLE_BUFFER};
74 static int clamping[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_CLAMPING};
75 static unsigned short filter_type[]= {[0 ... W9968CF_MAX_DEVICES-1] =
76 W9968CF_FILTER_TYPE};
77 static int largeview[]= {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_LARGEVIEW};
78 static unsigned short decompression[] = {[0 ... W9968CF_MAX_DEVICES-1] =
79 W9968CF_DECOMPRESSION};
80 static int upscaling[]= {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_UPSCALING};
81 static unsigned short force_palette[] = {[0 ... W9968CF_MAX_DEVICES-1] = 0};
82 static int force_rgb[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_FORCE_RGB};
83 static int autobright[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_AUTOBRIGHT};
84 static int autoexp[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_AUTOEXP};
85 static unsigned short lightfreq[] = {[0 ... W9968CF_MAX_DEVICES-1] =
86 W9968CF_LIGHTFREQ};
87 static int bandingfilter[] = {[0 ... W9968CF_MAX_DEVICES-1]=
88 W9968CF_BANDINGFILTER};
89 static short clockdiv[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_CLOCKDIV};
90 static int backlight[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_BACKLIGHT};
91 static int mirror[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_MIRROR};
92 static int monochrome[] = {[0 ... W9968CF_MAX_DEVICES-1]=W9968CF_MONOCHROME};
93 static unsigned int brightness[] = {[0 ... W9968CF_MAX_DEVICES-1] =
94 W9968CF_BRIGHTNESS};
95 static unsigned int hue[] = {[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_HUE};
96 static unsigned int colour[]={[0 ... W9968CF_MAX_DEVICES-1] = W9968CF_COLOUR};
97 static unsigned int contrast[] = {[0 ... W9968CF_MAX_DEVICES-1] =
98 W9968CF_CONTRAST};
99 static unsigned int whiteness[] = {[0 ... W9968CF_MAX_DEVICES-1] =
100 W9968CF_WHITENESS};
101 #ifdef W9968CF_DEBUG
102 static unsigned short debug = W9968CF_DEBUG_LEVEL;
103 static int specific_debug = W9968CF_SPECIFIC_DEBUG;
104 #endif
105
106 static unsigned int param_nv[24]; /* number of values per parameter */
107
108 #ifdef CONFIG_KMOD
109 module_param(ovmod_load, bool, 0644);
110 module_param(vppmod_load, bool, 0444);
111 #endif
112 module_param(simcams, ushort, 0644);
113 module_param_array(video_nr, short, &param_nv[0], 0444);
114 module_param_array(packet_size, uint, &param_nv[1], 0444);
115 module_param_array(max_buffers, ushort, &param_nv[2], 0444);
116 module_param_array(double_buffer, bool, &param_nv[3], 0444);
117 module_param_array(clamping, bool, &param_nv[4], 0444);
118 module_param_array(filter_type, ushort, &param_nv[5], 0444);
119 module_param_array(largeview, bool, &param_nv[6], 0444);
120 module_param_array(decompression, ushort, &param_nv[7], 0444);
121 module_param_array(upscaling, bool, &param_nv[8], 0444);
122 module_param_array(force_palette, ushort, &param_nv[9], 0444);
123 module_param_array(force_rgb, ushort, &param_nv[10], 0444);
124 module_param_array(autobright, bool, &param_nv[11], 0444);
125 module_param_array(autoexp, bool, &param_nv[12], 0444);
126 module_param_array(lightfreq, ushort, &param_nv[13], 0444);
127 module_param_array(bandingfilter, bool, &param_nv[14], 0444);
128 module_param_array(clockdiv, short, &param_nv[15], 0444);
129 module_param_array(backlight, bool, &param_nv[16], 0444);
130 module_param_array(mirror, bool, &param_nv[17], 0444);
131 module_param_array(monochrome, bool, &param_nv[18], 0444);
132 module_param_array(brightness, uint, &param_nv[19], 0444);
133 module_param_array(hue, uint, &param_nv[20], 0444);
134 module_param_array(colour, uint, &param_nv[21], 0444);
135 module_param_array(contrast, uint, &param_nv[22], 0444);
136 module_param_array(whiteness, uint, &param_nv[23], 0444);
137 #ifdef W9968CF_DEBUG
138 module_param(debug, ushort, 0644);
139 module_param(specific_debug, bool, 0644);
140 #endif
141
142 #ifdef CONFIG_KMOD
143 MODULE_PARM_DESC(ovmod_load,
144 "\n<0|1> Automatic 'ovcamchip' module loading."
145 "\n0 disabled, 1 enabled."
146 "\nIf enabled,'insmod' searches for the required 'ovcamchip'"
147 "\nmodule in the system, according to its configuration, and"
148 "\nattempts to load that module automatically. This action is"
149 "\nperformed once as soon as the 'w9968cf' module is loaded"
150 "\ninto memory."
151 "\nDefault value is "__MODULE_STRING(W9968CF_OVMOD_LOAD)"."
152 "\n");
153 MODULE_PARM_DESC(vppmod_load,
154 "\n<0|1> Automatic 'w9968cf-vpp' module loading."
155 "\n0 disabled, 1 enabled."
156 "\nIf enabled, every time an application attempts to open a"
157 "\ncamera, 'insmod' searches for the video post-processing"
158 "\nmodule in the system and loads it automatically (if"
159 "\npresent). The optional 'w9968cf-vpp' module adds extra"
160 "\n image manipulation functions to the 'w9968cf' module,like"
161 "\nsoftware up-scaling,colour conversions and video decoding"
162 "\nfor very high frame rates."
163 "\nDefault value is "__MODULE_STRING(W9968CF_VPPMOD_LOAD)"."
164 "\n");
165 #endif
166 MODULE_PARM_DESC(simcams,
167 "\n<n> Number of cameras allowed to stream simultaneously."
168 "\nn may vary from 0 to "
169 __MODULE_STRING(W9968CF_MAX_DEVICES)"."
170 "\nDefault value is "__MODULE_STRING(W9968CF_SIMCAMS)"."
171 "\n");
172 MODULE_PARM_DESC(video_nr,
173 "\n<-1|n[,...]> Specify V4L minor mode number."
174 "\n -1 = use next available (default)"
175 "\n n = use minor number n (integer >= 0)"
176 "\nYou can specify up to "__MODULE_STRING(W9968CF_MAX_DEVICES)
177 " cameras this way."
178 "\nFor example:"
179 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
180 "\nthe second camera and use auto for the first"
181 "\none and for every other camera."
182 "\n");
183 MODULE_PARM_DESC(packet_size,
184 "\n<n[,...]> Specify the maximum data payload"
185 "\nsize in bytes for alternate settings, for each device."
186 "\nn is scaled between 63 and 1023 "
187 "(default is "__MODULE_STRING(W9968CF_PACKET_SIZE)")."
188 "\n");
189 MODULE_PARM_DESC(max_buffers,
190 "\n<n[,...]> For advanced users."
191 "\nSpecify the maximum number of video frame buffers"
192 "\nto allocate for each device, from 2 to "
193 __MODULE_STRING(W9968CF_MAX_BUFFERS)
194 ". (default is "__MODULE_STRING(W9968CF_BUFFERS)")."
195 "\n");
196 MODULE_PARM_DESC(double_buffer,
197 "\n<0|1[,...]> "
198 "Hardware double buffering: 0 disabled, 1 enabled."
199 "\nIt should be enabled if you want smooth video output: if"
200 "\nyou obtain out of sync. video, disable it, or try to"
201 "\ndecrease the 'clockdiv' module parameter value."
202 "\nDefault value is "__MODULE_STRING(W9968CF_DOUBLE_BUFFER)
203 " for every device."
204 "\n");
205 MODULE_PARM_DESC(clamping,
206 "\n<0|1[,...]> Video data clamping: 0 disabled, 1 enabled."
207 "\nDefault value is "__MODULE_STRING(W9968CF_CLAMPING)
208 " for every device."
209 "\n");
210 MODULE_PARM_DESC(filter_type,
211 "\n<0|1|2[,...]> Video filter type."
212 "\n0 none, 1 (1-2-1) 3-tap filter, "
213 "2 (2-3-6-3-2) 5-tap filter."
214 "\nDefault value is "__MODULE_STRING(W9968CF_FILTER_TYPE)
215 " for every device."
216 "\nThe filter is used to reduce noise and aliasing artifacts"
217 "\nproduced by the CCD or CMOS image sensor, and the scaling"
218 " process."
219 "\n");
220 MODULE_PARM_DESC(largeview,
221 "\n<0|1[,...]> Large view: 0 disabled, 1 enabled."
222 "\nDefault value is "__MODULE_STRING(W9968CF_LARGEVIEW)
223 " for every device."
224 "\n");
225 MODULE_PARM_DESC(upscaling,
226 "\n<0|1[,...]> Software scaling (for non-compressed video):"
227 "\n0 disabled, 1 enabled."
228 "\nDisable it if you have a slow CPU or you don't have"
229 " enough memory."
230 "\nDefault value is "__MODULE_STRING(W9968CF_UPSCALING)
231 " for every device."
232 "\nIf 'w9968cf-vpp' is not present, this parameter is"
233 " set to 0."
234 "\n");
235 MODULE_PARM_DESC(decompression,
236 "\n<0|1|2[,...]> Software video decompression:"
237 "\n- 0 disables decompression (doesn't allow formats needing"
238 " decompression)"
239 "\n- 1 forces decompression (allows formats needing"
240 " decompression only);"
241 "\n- 2 allows any permitted formats."
242 "\nFormats supporting compressed video are YUV422P and"
243 " YUV420P/YUV420 "
244 "\nin any resolutions where both width and height are "
245 "a multiple of 16."
246 "\nDefault value is "__MODULE_STRING(W9968CF_DECOMPRESSION)
247 " for every device."
248 "\nIf 'w9968cf-vpp' is not present, forcing decompression is "
249 "\nnot allowed; in this case this parameter is set to 2."
250 "\n");
251 MODULE_PARM_DESC(force_palette,
252 "\n<0"
253 "|" __MODULE_STRING(VIDEO_PALETTE_UYVY)
254 "|" __MODULE_STRING(VIDEO_PALETTE_YUV420)
255 "|" __MODULE_STRING(VIDEO_PALETTE_YUV422P)
256 "|" __MODULE_STRING(VIDEO_PALETTE_YUV420P)
257 "|" __MODULE_STRING(VIDEO_PALETTE_YUYV)
258 "|" __MODULE_STRING(VIDEO_PALETTE_YUV422)
259 "|" __MODULE_STRING(VIDEO_PALETTE_GREY)
260 "|" __MODULE_STRING(VIDEO_PALETTE_RGB555)
261 "|" __MODULE_STRING(VIDEO_PALETTE_RGB565)
262 "|" __MODULE_STRING(VIDEO_PALETTE_RGB24)
263 "|" __MODULE_STRING(VIDEO_PALETTE_RGB32)
264 "[,...]>"
265 " Force picture palette."
266 "\nIn order:"
267 "\n- 0 allows any of the following formats:"
268 "\n- UYVY 16 bpp - Original video, compression disabled"
269 "\n- YUV420 12 bpp - Original video, compression enabled"
270 "\n- YUV422P 16 bpp - Original video, compression enabled"
271 "\n- YUV420P 12 bpp - Original video, compression enabled"
272 "\n- YUVY 16 bpp - Software conversion from UYVY"
273 "\n- YUV422 16 bpp - Software conversion from UYVY"
274 "\n- GREY 8 bpp - Software conversion from UYVY"
275 "\n- RGB555 16 bpp - Software conversion from UYVY"
276 "\n- RGB565 16 bpp - Software conversion from UYVY"
277 "\n- RGB24 24 bpp - Software conversion from UYVY"
278 "\n- RGB32 32 bpp - Software conversion from UYVY"
279 "\nWhen not 0, this parameter will override 'decompression'."
280 "\nDefault value is 0 for every device."
281 "\nInitial palette is "
282 __MODULE_STRING(W9968CF_PALETTE_DECOMP_ON)"."
283 "\nIf 'w9968cf-vpp' is not present, this parameter is"
284 " set to 9 (UYVY)."
285 "\n");
286 MODULE_PARM_DESC(force_rgb,
287 "\n<0|1[,...]> Read RGB video data instead of BGR:"
288 "\n 1 = use RGB component ordering."
289 "\n 0 = use BGR component ordering."
290 "\nThis parameter has effect when using RGBX palettes only."
291 "\nDefault value is "__MODULE_STRING(W9968CF_FORCE_RGB)
292 " for every device."
293 "\n");
294 MODULE_PARM_DESC(autobright,
295 "\n<0|1[,...]> Image sensor automatically changes brightness:"
296 "\n 0 = no, 1 = yes"
297 "\nDefault value is "__MODULE_STRING(W9968CF_AUTOBRIGHT)
298 " for every device."
299 "\n");
300 MODULE_PARM_DESC(autoexp,
301 "\n<0|1[,...]> Image sensor automatically changes exposure:"
302 "\n 0 = no, 1 = yes"
303 "\nDefault value is "__MODULE_STRING(W9968CF_AUTOEXP)
304 " for every device."
305 "\n");
306 MODULE_PARM_DESC(lightfreq,
307 "\n<50|60[,...]> Light frequency in Hz:"
308 "\n 50 for European and Asian lighting,"
309 " 60 for American lighting."
310 "\nDefault value is "__MODULE_STRING(W9968CF_LIGHTFREQ)
311 " for every device."
312 "\n");
313 MODULE_PARM_DESC(bandingfilter,
314 "\n<0|1[,...]> Banding filter to reduce effects of"
315 " fluorescent lighting:"
316 "\n 0 disabled, 1 enabled."
317 "\nThis filter tries to reduce the pattern of horizontal"
318 "\nlight/dark bands caused by some (usually fluorescent)"
319 " lighting."
320 "\nDefault value is "__MODULE_STRING(W9968CF_BANDINGFILTER)
321 " for every device."
322 "\n");
323 MODULE_PARM_DESC(clockdiv,
324 "\n<-1|n[,...]> "
325 "Force pixel clock divisor to a specific value (for experts):"
326 "\n n may vary from 0 to 127."
327 "\n -1 for automatic value."
328 "\nSee also the 'double_buffer' module parameter."
329 "\nDefault value is "__MODULE_STRING(W9968CF_CLOCKDIV)
330 " for every device."
331 "\n");
332 MODULE_PARM_DESC(backlight,
333 "\n<0|1[,...]> Objects are lit from behind:"
334 "\n 0 = no, 1 = yes"
335 "\nDefault value is "__MODULE_STRING(W9968CF_BACKLIGHT)
336 " for every device."
337 "\n");
338 MODULE_PARM_DESC(mirror,
339 "\n<0|1[,...]> Reverse image horizontally:"
340 "\n 0 = no, 1 = yes"
341 "\nDefault value is "__MODULE_STRING(W9968CF_MIRROR)
342 " for every device."
343 "\n");
344 MODULE_PARM_DESC(monochrome,
345 "\n<0|1[,...]> Use image sensor as monochrome sensor:"
346 "\n 0 = no, 1 = yes"
347 "\nNot all the sensors support monochrome color."
348 "\nDefault value is "__MODULE_STRING(W9968CF_MONOCHROME)
349 " for every device."
350 "\n");
351 MODULE_PARM_DESC(brightness,
352 "\n<n[,...]> Set picture brightness (0-65535)."
353 "\nDefault value is "__MODULE_STRING(W9968CF_BRIGHTNESS)
354 " for every device."
355 "\nThis parameter has no effect if 'autobright' is enabled."
356 "\n");
357 MODULE_PARM_DESC(hue,
358 "\n<n[,...]> Set picture hue (0-65535)."
359 "\nDefault value is "__MODULE_STRING(W9968CF_HUE)
360 " for every device."
361 "\n");
362 MODULE_PARM_DESC(colour,
363 "\n<n[,...]> Set picture saturation (0-65535)."
364 "\nDefault value is "__MODULE_STRING(W9968CF_COLOUR)
365 " for every device."
366 "\n");
367 MODULE_PARM_DESC(contrast,
368 "\n<n[,...]> Set picture contrast (0-65535)."
369 "\nDefault value is "__MODULE_STRING(W9968CF_CONTRAST)
370 " for every device."
371 "\n");
372 MODULE_PARM_DESC(whiteness,
373 "\n<n[,...]> Set picture whiteness (0-65535)."
374 "\nDefault value is "__MODULE_STRING(W9968CF_WHITENESS)
375 " for every device."
376 "\n");
377 #ifdef W9968CF_DEBUG
378 MODULE_PARM_DESC(debug,
379 "\n<n> Debugging information level, from 0 to 6:"
380 "\n0 = none (use carefully)"
381 "\n1 = critical errors"
382 "\n2 = significant informations"
383 "\n3 = configuration or general messages"
384 "\n4 = warnings"
385 "\n5 = called functions"
386 "\n6 = function internals"
387 "\nLevel 5 and 6 are useful for testing only, when only "
388 "one device is used."
389 "\nDefault value is "__MODULE_STRING(W9968CF_DEBUG_LEVEL)"."
390 "\n");
391 MODULE_PARM_DESC(specific_debug,
392 "\n<0|1> Enable or disable specific debugging messages:"
393 "\n0 = print messages concerning every level"
394 " <= 'debug' level."
395 "\n1 = print messages concerning the level"
396 " indicated by 'debug'."
397 "\nDefault value is "
398 __MODULE_STRING(W9968CF_SPECIFIC_DEBUG)"."
399 "\n");
400 #endif /* W9968CF_DEBUG */
401
402
403
404 /****************************************************************************
405 * Some prototypes *
406 ****************************************************************************/
407
408 /* Video4linux interface */
409 static struct file_operations w9968cf_fops;
410 static int w9968cf_open(struct inode*, struct file*);
411 static int w9968cf_release(struct inode*, struct file*);
412 static int w9968cf_mmap(struct file*, struct vm_area_struct*);
413 static int w9968cf_ioctl(struct inode*, struct file*, unsigned, unsigned long);
414 static ssize_t w9968cf_read(struct file*, char __user *, size_t, loff_t*);
415 static int w9968cf_v4l_ioctl(struct inode*, struct file*, unsigned int,
416 void __user *);
417
418 /* USB-specific */
419 static int w9968cf_start_transfer(struct w9968cf_device*);
420 static int w9968cf_stop_transfer(struct w9968cf_device*);
421 static int w9968cf_write_reg(struct w9968cf_device*, u16 value, u16 index);
422 static int w9968cf_read_reg(struct w9968cf_device*, u16 index);
423 static int w9968cf_write_fsb(struct w9968cf_device*, u16* data);
424 static int w9968cf_write_sb(struct w9968cf_device*, u16 value);
425 static int w9968cf_read_sb(struct w9968cf_device*);
426 static int w9968cf_upload_quantizationtables(struct w9968cf_device*);
427 static void w9968cf_urb_complete(struct urb *urb, struct pt_regs *regs);
428
429 /* Low-level I2C (SMBus) I/O */
430 static int w9968cf_smbus_start(struct w9968cf_device*);
431 static int w9968cf_smbus_stop(struct w9968cf_device*);
432 static int w9968cf_smbus_write_byte(struct w9968cf_device*, u8 v);
433 static int w9968cf_smbus_read_byte(struct w9968cf_device*, u8* v);
434 static int w9968cf_smbus_write_ack(struct w9968cf_device*);
435 static int w9968cf_smbus_read_ack(struct w9968cf_device*);
436 static int w9968cf_smbus_refresh_bus(struct w9968cf_device*);
437 static int w9968cf_i2c_adap_read_byte(struct w9968cf_device* cam,
438 u16 address, u8* value);
439 static int w9968cf_i2c_adap_read_byte_data(struct w9968cf_device*, u16 address,
440 u8 subaddress, u8* value);
441 static int w9968cf_i2c_adap_write_byte(struct w9968cf_device*,
442 u16 address, u8 subaddress);
443 static int w9968cf_i2c_adap_fastwrite_byte_data(struct w9968cf_device*,
444 u16 address, u8 subaddress,
445 u8 value);
446
447 /* I2C interface to kernel */
448 static int w9968cf_i2c_init(struct w9968cf_device*);
449 static int w9968cf_i2c_smbus_xfer(struct i2c_adapter*, u16 addr,
450 unsigned short flags, char read_write,
451 u8 command, int size, union i2c_smbus_data*);
452 static u32 w9968cf_i2c_func(struct i2c_adapter*);
453 static int w9968cf_i2c_attach_inform(struct i2c_client*);
454 static int w9968cf_i2c_detach_inform(struct i2c_client*);
455 static int w9968cf_i2c_control(struct i2c_adapter*, unsigned int cmd,
456 unsigned long arg);
457
458 /* Memory management */
459 static void* rvmalloc(unsigned long size);
460 static void rvfree(void *mem, unsigned long size);
461 static void w9968cf_deallocate_memory(struct w9968cf_device*);
462 static int w9968cf_allocate_memory(struct w9968cf_device*);
463
464 /* High-level image sensor control functions */
465 static int w9968cf_sensor_set_control(struct w9968cf_device*,int cid,int val);
466 static int w9968cf_sensor_get_control(struct w9968cf_device*,int cid,int *val);
467 static int w9968cf_sensor_cmd(struct w9968cf_device*,
468 unsigned int cmd, void *arg);
469 static int w9968cf_sensor_init(struct w9968cf_device*);
470 static int w9968cf_sensor_update_settings(struct w9968cf_device*);
471 static int w9968cf_sensor_get_picture(struct w9968cf_device*);
472 static int w9968cf_sensor_update_picture(struct w9968cf_device*,
473 struct video_picture pict);
474
475 /* Other helper functions */
476 static void w9968cf_configure_camera(struct w9968cf_device*,struct usb_device*,
477 enum w9968cf_model_id,
478 const unsigned short dev_nr);
479 static void w9968cf_adjust_configuration(struct w9968cf_device*);
480 static int w9968cf_turn_on_led(struct w9968cf_device*);
481 static int w9968cf_init_chip(struct w9968cf_device*);
482 static inline u16 w9968cf_valid_palette(u16 palette);
483 static inline u16 w9968cf_valid_depth(u16 palette);
484 static inline u8 w9968cf_need_decompression(u16 palette);
485 static int w9968cf_set_picture(struct w9968cf_device*, struct video_picture);
486 static int w9968cf_set_window(struct w9968cf_device*, struct video_window);
487 static int w9968cf_postprocess_frame(struct w9968cf_device*,
488 struct w9968cf_frame_t*);
489 static int w9968cf_adjust_window_size(struct w9968cf_device*, u16* w, u16* h);
490 static void w9968cf_init_framelist(struct w9968cf_device*);
491 static void w9968cf_push_frame(struct w9968cf_device*, u8 f_num);
492 static void w9968cf_pop_frame(struct w9968cf_device*,struct w9968cf_frame_t**);
493 static void w9968cf_release_resources(struct w9968cf_device*);
494
495 /* Intermodule communication */
496 static int w9968cf_vppmod_detect(struct w9968cf_device*);
497 static void w9968cf_vppmod_release(struct w9968cf_device*);
498
499
500
501 /****************************************************************************
502 * Symbolic names *
503 ****************************************************************************/
504
505 /* Used to represent a list of values and their respective symbolic names */
506 struct w9968cf_symbolic_list {
507 const int num;
508 const char *name;
509 };
510
511 /*--------------------------------------------------------------------------
512 Returns the name of the matching element in the symbolic_list array. The
513 end of the list must be marked with an element that has a NULL name.
514 --------------------------------------------------------------------------*/
515 static inline const char *
516 symbolic(struct w9968cf_symbolic_list list[], const int num)
517 {
518 int i;
519
520 for (i = 0; list[i].name != NULL; i++)
521 if (list[i].num == num)
522 return (list[i].name);
523
524 return "Unknown";
525 }
526
527 static struct w9968cf_symbolic_list camlist[] = {
528 { W9968CF_MOD_GENERIC, "W996[87]CF JPEG USB Dual Mode Camera" },
529 { W9968CF_MOD_CLVBWGP, "Creative Labs Video Blaster WebCam Go Plus" },
530
531 /* Other cameras (having the same descriptors as Generic W996[87]CF) */
532 { W9968CF_MOD_ADPVDMA, "Aroma Digi Pen VGA Dual Mode ADG-5000" },
533 { W9986CF_MOD_AAU, "AVerMedia AVerTV USB" },
534 { W9968CF_MOD_CLVBWG, "Creative Labs Video Blaster WebCam Go" },
535 { W9968CF_MOD_LL, "Lebon LDC-035A" },
536 { W9968CF_MOD_EEEMC, "Ezonics EZ-802 EZMega Cam" },
537 { W9968CF_MOD_OOE, "OmniVision OV8610-EDE" },
538 { W9968CF_MOD_ODPVDMPC, "OPCOM Digi Pen VGA Dual Mode Pen Camera" },
539 { W9968CF_MOD_PDPII, "Pretec Digi Pen-II" },
540 { W9968CF_MOD_PDP480, "Pretec DigiPen-480" },
541
542 { -1, NULL }
543 };
544
545 static struct w9968cf_symbolic_list senlist[] = {
546 { CC_OV76BE, "OV76BE" },
547 { CC_OV7610, "OV7610" },
548 { CC_OV7620, "OV7620" },
549 { CC_OV7620AE, "OV7620AE" },
550 { CC_OV6620, "OV6620" },
551 { CC_OV6630, "OV6630" },
552 { CC_OV6630AE, "OV6630AE" },
553 { CC_OV6630AF, "OV6630AF" },
554 { -1, NULL }
555 };
556
557 /* Video4Linux1 palettes */
558 static struct w9968cf_symbolic_list v4l1_plist[] = {
559 { VIDEO_PALETTE_GREY, "GREY" },
560 { VIDEO_PALETTE_HI240, "HI240" },
561 { VIDEO_PALETTE_RGB565, "RGB565" },
562 { VIDEO_PALETTE_RGB24, "RGB24" },
563 { VIDEO_PALETTE_RGB32, "RGB32" },
564 { VIDEO_PALETTE_RGB555, "RGB555" },
565 { VIDEO_PALETTE_YUV422, "YUV422" },
566 { VIDEO_PALETTE_YUYV, "YUYV" },
567 { VIDEO_PALETTE_UYVY, "UYVY" },
568 { VIDEO_PALETTE_YUV420, "YUV420" },
569 { VIDEO_PALETTE_YUV411, "YUV411" },
570 { VIDEO_PALETTE_RAW, "RAW" },
571 { VIDEO_PALETTE_YUV422P, "YUV422P" },
572 { VIDEO_PALETTE_YUV411P, "YUV411P" },
573 { VIDEO_PALETTE_YUV420P, "YUV420P" },
574 { VIDEO_PALETTE_YUV410P, "YUV410P" },
575 { -1, NULL }
576 };
577
578 /* Decoder error codes: */
579 static struct w9968cf_symbolic_list decoder_errlist[] = {
580 { W9968CF_DEC_ERR_CORRUPTED_DATA, "Corrupted data" },
581 { W9968CF_DEC_ERR_BUF_OVERFLOW, "Buffer overflow" },
582 { W9968CF_DEC_ERR_NO_SOI, "SOI marker not found" },
583 { W9968CF_DEC_ERR_NO_SOF0, "SOF0 marker not found" },
584 { W9968CF_DEC_ERR_NO_SOS, "SOS marker not found" },
585 { W9968CF_DEC_ERR_NO_EOI, "EOI marker not found" },
586 { -1, NULL }
587 };
588
589 /* URB error codes: */
590 static struct w9968cf_symbolic_list urb_errlist[] = {
591 { -ENOMEM, "No memory for allocation of internal structures" },
592 { -ENOSPC, "The host controller's bandwidth is already consumed" },
593 { -ENOENT, "URB was canceled by unlink_urb" },
594 { -EXDEV, "ISO transfer only partially completed" },
595 { -EAGAIN, "Too match scheduled for the future" },
596 { -ENXIO, "URB already queued" },
597 { -EFBIG, "Too much ISO frames requested" },
598 { -ENOSR, "Buffer error (overrun)" },
599 { -EPIPE, "Specified endpoint is stalled (device not responding)"},
600 { -EOVERFLOW, "Babble (bad cable?)" },
601 { -EPROTO, "Bit-stuff error (bad cable?)" },
602 { -EILSEQ, "CRC/Timeout" },
603 { -ETIMEDOUT, "NAK (device does not respond)" },
604 { -1, NULL }
605 };
606
607
608
609 /****************************************************************************
610 * Memory management functions *
611 ****************************************************************************/
612 static void* rvmalloc(unsigned long size)
613 {
614 void* mem;
615 unsigned long adr;
616
617 size = PAGE_ALIGN(size);
618 mem = vmalloc_32(size);
619 if (!mem)
620 return NULL;
621
622 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
623 adr = (unsigned long) mem;
624 while (size > 0) {
625 SetPageReserved(vmalloc_to_page((void *)adr));
626 adr += PAGE_SIZE;
627 size -= PAGE_SIZE;
628 }
629
630 return mem;
631 }
632
633
634 static void rvfree(void* mem, unsigned long size)
635 {
636 unsigned long adr;
637
638 if (!mem)
639 return;
640
641 adr = (unsigned long) mem;
642 while ((long) size > 0) {
643 ClearPageReserved(vmalloc_to_page((void *)adr));
644 adr += PAGE_SIZE;
645 size -= PAGE_SIZE;
646 }
647 vfree(mem);
648 }
649
650
651 /*--------------------------------------------------------------------------
652 Deallocate previously allocated memory.
653 --------------------------------------------------------------------------*/
654 static void w9968cf_deallocate_memory(struct w9968cf_device* cam)
655 {
656 u8 i;
657
658 /* Free the isochronous transfer buffers */
659 for (i = 0; i < W9968CF_URBS; i++) {
660 kfree(cam->transfer_buffer[i]);
661 cam->transfer_buffer[i] = NULL;
662 }
663
664 /* Free temporary frame buffer */
665 if (cam->frame_tmp.buffer) {
666 rvfree(cam->frame_tmp.buffer, cam->frame_tmp.size);
667 cam->frame_tmp.buffer = NULL;
668 }
669
670 /* Free helper buffer */
671 if (cam->frame_vpp.buffer) {
672 rvfree(cam->frame_vpp.buffer, cam->frame_vpp.size);
673 cam->frame_vpp.buffer = NULL;
674 }
675
676 /* Free video frame buffers */
677 if (cam->frame[0].buffer) {
678 rvfree(cam->frame[0].buffer, cam->nbuffers*cam->frame[0].size);
679 cam->frame[0].buffer = NULL;
680 }
681
682 cam->nbuffers = 0;
683
684 DBG(5, "Memory successfully deallocated")
685 }
686
687
688 /*--------------------------------------------------------------------------
689 Allocate memory buffers for USB transfers and video frames.
690 This function is called by open() only.
691 Return 0 on success, a negative number otherwise.
692 --------------------------------------------------------------------------*/
693 static int w9968cf_allocate_memory(struct w9968cf_device* cam)
694 {
695 const u16 p_size = wMaxPacketSize[cam->altsetting-1];
696 void* buff = NULL;
697 unsigned long hw_bufsize, vpp_bufsize;
698 u8 i, bpp;
699
700 /* NOTE: Deallocation is done elsewhere in case of error */
701
702 /* Calculate the max amount of raw data per frame from the device */
703 hw_bufsize = cam->maxwidth*cam->maxheight*2;
704
705 /* Calculate the max buf. size needed for post-processing routines */
706 bpp = (w9968cf_vpp) ? 4 : 2;
707 if (cam->upscaling)
708 vpp_bufsize = max(W9968CF_MAX_WIDTH*W9968CF_MAX_HEIGHT*bpp,
709 cam->maxwidth*cam->maxheight*bpp);
710 else
711 vpp_bufsize = cam->maxwidth*cam->maxheight*bpp;
712
713 /* Allocate memory for the isochronous transfer buffers */
714 for (i = 0; i < W9968CF_URBS; i++) {
715 if (!(cam->transfer_buffer[i] =
716 kmalloc(W9968CF_ISO_PACKETS*p_size, GFP_KERNEL))) {
717 DBG(1, "Couldn't allocate memory for the isochronous "
718 "transfer buffers (%u bytes)",
719 p_size * W9968CF_ISO_PACKETS)
720 return -ENOMEM;
721 }
722 memset(cam->transfer_buffer[i], 0, W9968CF_ISO_PACKETS*p_size);
723 }
724
725 /* Allocate memory for the temporary frame buffer */
726 if (!(cam->frame_tmp.buffer = rvmalloc(hw_bufsize))) {
727 DBG(1, "Couldn't allocate memory for the temporary "
728 "video frame buffer (%lu bytes)", hw_bufsize)
729 return -ENOMEM;
730 }
731 cam->frame_tmp.size = hw_bufsize;
732 cam->frame_tmp.number = -1;
733
734 /* Allocate memory for the helper buffer */
735 if (w9968cf_vpp) {
736 if (!(cam->frame_vpp.buffer = rvmalloc(vpp_bufsize))) {
737 DBG(1, "Couldn't allocate memory for the helper buffer"
738 " (%lu bytes)", vpp_bufsize)
739 return -ENOMEM;
740 }
741 cam->frame_vpp.size = vpp_bufsize;
742 } else
743 cam->frame_vpp.buffer = NULL;
744
745 /* Allocate memory for video frame buffers */
746 cam->nbuffers = cam->max_buffers;
747 while (cam->nbuffers >= 2) {
748 if ((buff = rvmalloc(cam->nbuffers * vpp_bufsize)))
749 break;
750 else
751 cam->nbuffers--;
752 }
753
754 if (!buff) {
755 DBG(1, "Couldn't allocate memory for the video frame buffers")
756 cam->nbuffers = 0;
757 return -ENOMEM;
758 }
759
760 if (cam->nbuffers != cam->max_buffers)
761 DBG(2, "Couldn't allocate memory for %u video frame buffers. "
762 "Only memory for %u buffers has been allocated",
763 cam->max_buffers, cam->nbuffers)
764
765 for (i = 0; i < cam->nbuffers; i++) {
766 cam->frame[i].buffer = buff + i*vpp_bufsize;
767 cam->frame[i].size = vpp_bufsize;
768 cam->frame[i].number = i;
769 /* Circular list */
770 if (i != cam->nbuffers-1)
771 cam->frame[i].next = &cam->frame[i+1];
772 else
773 cam->frame[i].next = &cam->frame[0];
774 cam->frame[i].status = F_UNUSED;
775 }
776
777 DBG(5, "Memory successfully allocated")
778 return 0;
779 }
780
781
782
783 /****************************************************************************
784 * USB-specific functions *
785 ****************************************************************************/
786
787 /*--------------------------------------------------------------------------
788 This is an handler function which is called after the URBs are completed.
789 It collects multiple data packets coming from the camera by putting them
790 into frame buffers: one or more zero data length data packets are used to
791 mark the end of a video frame; the first non-zero data packet is the start
792 of the next video frame; if an error is encountered in a packet, the entire
793 video frame is discarded and grabbed again.
794 If there are no requested frames in the FIFO list, packets are collected into
795 a temporary buffer.
796 --------------------------------------------------------------------------*/
797 static void w9968cf_urb_complete(struct urb *urb, struct pt_regs *regs)
798 {
799 struct w9968cf_device* cam = (struct w9968cf_device*)urb->context;
800 struct w9968cf_frame_t** f;
801 unsigned int len, status;
802 void* pos;
803 u8 i;
804 int err = 0;
805
806 if ((!cam->streaming) || cam->disconnected) {
807 DBG(4, "Got interrupt, but not streaming")
808 return;
809 }
810
811 /* "(*f)" will be used instead of "cam->frame_current" */
812 f = &cam->frame_current;
813
814 /* If a frame has been requested and we are grabbing into
815 the temporary frame, we'll switch to that requested frame */
816 if ((*f) == &cam->frame_tmp && *cam->requested_frame) {
817 if (cam->frame_tmp.status == F_GRABBING) {
818 w9968cf_pop_frame(cam, &cam->frame_current);
819 (*f)->status = F_GRABBING;
820 (*f)->length = cam->frame_tmp.length;
821 memcpy((*f)->buffer, cam->frame_tmp.buffer,
822 (*f)->length);
823 DBG(6, "Switched from temp. frame to frame #%d",
824 (*f)->number)
825 }
826 }
827
828 for (i = 0; i < urb->number_of_packets; i++) {
829 len = urb->iso_frame_desc[i].actual_length;
830 status = urb->iso_frame_desc[i].status;
831 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
832
833 if (status && len != 0) {
834 DBG(4, "URB failed, error in data packet "
835 "(error #%u, %s)",
836 status, symbolic(urb_errlist, status))
837 (*f)->status = F_ERROR;
838 continue;
839 }
840
841 if (len) { /* start of frame */
842
843 if ((*f)->status == F_UNUSED) {
844 (*f)->status = F_GRABBING;
845 (*f)->length = 0;
846 }
847
848 /* Buffer overflows shouldn't happen, however...*/
849 if ((*f)->length + len > (*f)->size) {
850 DBG(4, "Buffer overflow: bad data packets")
851 (*f)->status = F_ERROR;
852 }
853
854 if ((*f)->status == F_GRABBING) {
855 memcpy((*f)->buffer + (*f)->length, pos, len);
856 (*f)->length += len;
857 }
858
859 } else if ((*f)->status == F_GRABBING) { /* end of frame */
860
861 DBG(6, "Frame #%d successfully grabbed", (*f)->number)
862
863 if (cam->vpp_flag & VPP_DECOMPRESSION) {
864 err = w9968cf_vpp->check_headers((*f)->buffer,
865 (*f)->length);
866 if (err) {
867 DBG(4, "Skip corrupted frame: %s",
868 symbolic(decoder_errlist, err))
869 (*f)->status = F_UNUSED;
870 continue; /* grab this frame again */
871 }
872 }
873
874 (*f)->status = F_READY;
875 (*f)->queued = 0;
876
877 /* Take a pointer to the new frame from the FIFO list.
878 If the list is empty,we'll use the temporary frame*/
879 if (*cam->requested_frame)
880 w9968cf_pop_frame(cam, &cam->frame_current);
881 else {
882 cam->frame_current = &cam->frame_tmp;
883 (*f)->status = F_UNUSED;
884 }
885
886 } else if ((*f)->status == F_ERROR)
887 (*f)->status = F_UNUSED; /* grab it again */
888
889 PDBGG("Frame length %lu | pack.#%u | pack.len. %u | state %d",
890 (unsigned long)(*f)->length, i, len, (*f)->status)
891
892 } /* end for */
893
894 /* Resubmit this URB */
895 urb->dev = cam->usbdev;
896 urb->status = 0;
897 spin_lock(&cam->urb_lock);
898 if (cam->streaming)
899 if ((err = usb_submit_urb(urb, GFP_ATOMIC))) {
900 cam->misconfigured = 1;
901 DBG(1, "Couldn't resubmit the URB: error %d, %s",
902 err, symbolic(urb_errlist, err))
903 }
904 spin_unlock(&cam->urb_lock);
905
906 /* Wake up the user process */
907 wake_up_interruptible(&cam->wait_queue);
908 }
909
910
911 /*---------------------------------------------------------------------------
912 Setup the URB structures for the isochronous transfer.
913 Submit the URBs so that the data transfer begins.
914 Return 0 on success, a negative number otherwise.
915 ---------------------------------------------------------------------------*/
916 static int w9968cf_start_transfer(struct w9968cf_device* cam)
917 {
918 struct usb_device *udev = cam->usbdev;
919 struct urb* urb;
920 const u16 p_size = wMaxPacketSize[cam->altsetting-1];
921 u16 w, h, d;
922 int vidcapt;
923 u32 t_size;
924 int err = 0;
925 s8 i, j;
926
927 for (i = 0; i < W9968CF_URBS; i++) {
928 urb = usb_alloc_urb(W9968CF_ISO_PACKETS, GFP_KERNEL);
929 cam->urb[i] = urb;
930 if (!urb) {
931 for (j = 0; j < i; j++)
932 usb_free_urb(cam->urb[j]);
933 DBG(1, "Couldn't allocate the URB structures")
934 return -ENOMEM;
935 }
936
937 urb->dev = udev;
938 urb->context = (void*)cam;
939 urb->pipe = usb_rcvisocpipe(udev, 1);
940 urb->transfer_flags = URB_ISO_ASAP;
941 urb->number_of_packets = W9968CF_ISO_PACKETS;
942 urb->complete = w9968cf_urb_complete;
943 urb->transfer_buffer = cam->transfer_buffer[i];
944 urb->transfer_buffer_length = p_size*W9968CF_ISO_PACKETS;
945 urb->interval = 1;
946 for (j = 0; j < W9968CF_ISO_PACKETS; j++) {
947 urb->iso_frame_desc[j].offset = p_size*j;
948 urb->iso_frame_desc[j].length = p_size;
949 }
950 }
951
952 /* Transfer size per frame, in WORD ! */
953 d = cam->hw_depth;
954 w = cam->hw_width;
955 h = cam->hw_height;
956
957 t_size = (w*h*d)/16;
958
959 err = w9968cf_write_reg(cam, 0xbf17, 0x00); /* reset everything */
960 err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* normal operation */
961
962 /* Transfer size */
963 err += w9968cf_write_reg(cam, t_size & 0xffff, 0x3d); /* low bits */
964 err += w9968cf_write_reg(cam, t_size >> 16, 0x3e); /* high bits */
965
966 if (cam->vpp_flag & VPP_DECOMPRESSION)
967 err += w9968cf_upload_quantizationtables(cam);
968
969 vidcapt = w9968cf_read_reg(cam, 0x16); /* read picture settings */
970 err += w9968cf_write_reg(cam, vidcapt|0x8000, 0x16); /* capt. enable */
971
972 err += usb_set_interface(udev, 0, cam->altsetting);
973 err += w9968cf_write_reg(cam, 0x8a05, 0x3c); /* USB FIFO enable */
974
975 if (err || (vidcapt < 0)) {
976 for (i = 0; i < W9968CF_URBS; i++)
977 usb_free_urb(cam->urb[i]);
978 DBG(1, "Couldn't tell the camera to start the data transfer")
979 return err;
980 }
981
982 w9968cf_init_framelist(cam);
983
984 /* Begin to grab into the temporary buffer */
985 cam->frame_tmp.status = F_UNUSED;
986 cam->frame_tmp.queued = 0;
987 cam->frame_current = &cam->frame_tmp;
988
989 if (!(cam->vpp_flag & VPP_DECOMPRESSION))
990 DBG(5, "Isochronous transfer size: %lu bytes/frame",
991 (unsigned long)t_size*2)
992
993 DBG(5, "Starting the isochronous transfer...")
994
995 cam->streaming = 1;
996
997 /* Submit the URBs */
998 for (i = 0; i < W9968CF_URBS; i++) {
999 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
1000 if (err) {
1001 cam->streaming = 0;
1002 for (j = i-1; j >= 0; j--) {
1003 usb_kill_urb(cam->urb[j]);
1004 usb_free_urb(cam->urb[j]);
1005 }
1006 DBG(1, "Couldn't send a transfer request to the "
1007 "USB core (error #%d, %s)", err,
1008 symbolic(urb_errlist, err))
1009 return err;
1010 }
1011 }
1012
1013 return 0;
1014 }
1015
1016
1017 /*--------------------------------------------------------------------------
1018 Stop the isochronous transfer and set alternate setting to 0 (0Mb/s).
1019 Return 0 on success, a negative number otherwise.
1020 --------------------------------------------------------------------------*/
1021 static int w9968cf_stop_transfer(struct w9968cf_device* cam)
1022 {
1023 struct usb_device *udev = cam->usbdev;
1024 unsigned long lock_flags;
1025 int err = 0;
1026 s8 i;
1027
1028 if (!cam->streaming)
1029 return 0;
1030
1031 /* This avoids race conditions with usb_submit_urb()
1032 in the URB completition handler */
1033 spin_lock_irqsave(&cam->urb_lock, lock_flags);
1034 cam->streaming = 0;
1035 spin_unlock_irqrestore(&cam->urb_lock, lock_flags);
1036
1037 for (i = W9968CF_URBS-1; i >= 0; i--)
1038 if (cam->urb[i]) {
1039 usb_kill_urb(cam->urb[i]);
1040 usb_free_urb(cam->urb[i]);
1041 cam->urb[i] = NULL;
1042 }
1043
1044 if (cam->disconnected)
1045 goto exit;
1046
1047 err = w9968cf_write_reg(cam, 0x0a05, 0x3c); /* stop USB transfer */
1048 err += usb_set_interface(udev, 0, 0); /* 0 Mb/s */
1049 err += w9968cf_write_reg(cam, 0x0000, 0x39); /* disable JPEG encoder */
1050 err += w9968cf_write_reg(cam, 0x0000, 0x16); /* stop video capture */
1051
1052 if (err) {
1053 DBG(2, "Failed to tell the camera to stop the isochronous "
1054 "transfer. However this is not a critical error.")
1055 return -EIO;
1056 }
1057
1058 exit:
1059 DBG(5, "Isochronous transfer stopped")
1060 return 0;
1061 }
1062
1063
1064 /*--------------------------------------------------------------------------
1065 Write a W9968CF register.
1066 Return 0 on success, -1 otherwise.
1067 --------------------------------------------------------------------------*/
1068 static int w9968cf_write_reg(struct w9968cf_device* cam, u16 value, u16 index)
1069 {
1070 struct usb_device* udev = cam->usbdev;
1071 int res;
1072
1073 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0,
1074 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
1075 value, index, NULL, 0, W9968CF_USB_CTRL_TIMEOUT);
1076
1077 if (res < 0)
1078 DBG(4, "Failed to write a register "
1079 "(value 0x%04X, index 0x%02X, error #%d, %s)",
1080 value, index, res, symbolic(urb_errlist, res))
1081
1082 return (res >= 0) ? 0 : -1;
1083 }
1084
1085
1086 /*--------------------------------------------------------------------------
1087 Read a W9968CF register.
1088 Return the register value on success, -1 otherwise.
1089 --------------------------------------------------------------------------*/
1090 static int w9968cf_read_reg(struct w9968cf_device* cam, u16 index)
1091 {
1092 struct usb_device* udev = cam->usbdev;
1093 u16* buff = cam->control_buffer;
1094 int res;
1095
1096 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 1,
1097 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1098 0, index, buff, 2, W9968CF_USB_CTRL_TIMEOUT);
1099
1100 if (res < 0)
1101 DBG(4, "Failed to read a register "
1102 "(index 0x%02X, error #%d, %s)",
1103 index, res, symbolic(urb_errlist, res))
1104
1105 return (res >= 0) ? (int)(*buff) : -1;
1106 }
1107
1108
1109 /*--------------------------------------------------------------------------
1110 Write 64-bit data to the fast serial bus registers.
1111 Return 0 on success, -1 otherwise.
1112 --------------------------------------------------------------------------*/
1113 static int w9968cf_write_fsb(struct w9968cf_device* cam, u16* data)
1114 {
1115 struct usb_device* udev = cam->usbdev;
1116 u16 value;
1117 int res;
1118
1119 value = *data++;
1120
1121 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0,
1122 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
1123 value, 0x06, data, 6, W9968CF_USB_CTRL_TIMEOUT);
1124
1125 if (res < 0)
1126 DBG(4, "Failed to write the FSB registers "
1127 "(error #%d, %s)", res, symbolic(urb_errlist, res))
1128
1129 return (res >= 0) ? 0 : -1;
1130 }
1131
1132
1133 /*--------------------------------------------------------------------------
1134 Write data to the serial bus control register.
1135 Return 0 on success, a negative number otherwise.
1136 --------------------------------------------------------------------------*/
1137 static int w9968cf_write_sb(struct w9968cf_device* cam, u16 value)
1138 {
1139 int err = 0;
1140
1141 err = w9968cf_write_reg(cam, value, 0x01);
1142 udelay(W9968CF_I2C_BUS_DELAY);
1143
1144 return err;
1145 }
1146
1147
1148 /*--------------------------------------------------------------------------
1149 Read data from the serial bus control register.
1150 Return 0 on success, a negative number otherwise.
1151 --------------------------------------------------------------------------*/
1152 static int w9968cf_read_sb(struct w9968cf_device* cam)
1153 {
1154 int v = 0;
1155
1156 v = w9968cf_read_reg(cam, 0x01);
1157 udelay(W9968CF_I2C_BUS_DELAY);
1158
1159 return v;
1160 }
1161
1162
1163 /*--------------------------------------------------------------------------
1164 Upload quantization tables for the JPEG compression.
1165 This function is called by w9968cf_start_transfer().
1166 Return 0 on success, a negative number otherwise.
1167 --------------------------------------------------------------------------*/
1168 static int w9968cf_upload_quantizationtables(struct w9968cf_device* cam)
1169 {
1170 u16 a, b;
1171 int err = 0, i, j;
1172
1173 err += w9968cf_write_reg(cam, 0x0010, 0x39); /* JPEG clock enable */
1174
1175 for (i = 0, j = 0; i < 32; i++, j += 2) {
1176 a = Y_QUANTABLE[j] | ((unsigned)(Y_QUANTABLE[j+1]) << 8);
1177 b = UV_QUANTABLE[j] | ((unsigned)(UV_QUANTABLE[j+1]) << 8);
1178 err += w9968cf_write_reg(cam, a, 0x40+i);
1179 err += w9968cf_write_reg(cam, b, 0x60+i);
1180 }
1181 err += w9968cf_write_reg(cam, 0x0012, 0x39); /* JPEG encoder enable */
1182
1183 return err;
1184 }
1185
1186
1187
1188 /****************************************************************************
1189 * Low-level I2C I/O functions. *
1190 * The adapter supports the following I2C transfer functions: *
1191 * i2c_adap_fastwrite_byte_data() (at 400 kHz bit frequency only) *
1192 * i2c_adap_read_byte_data() *
1193 * i2c_adap_read_byte() *
1194 ****************************************************************************/
1195
1196 static int w9968cf_smbus_start(struct w9968cf_device* cam)
1197 {
1198 int err = 0;
1199
1200 err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
1201 err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
1202
1203 return err;
1204 }
1205
1206
1207 static int w9968cf_smbus_stop(struct w9968cf_device* cam)
1208 {
1209 int err = 0;
1210
1211 err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
1212 err += w9968cf_write_sb(cam, 0x0013); /* SDE=1, SDA=1, SCL=1 */
1213
1214 return err;
1215 }
1216
1217
1218 static int w9968cf_smbus_write_byte(struct w9968cf_device* cam, u8 v)
1219 {
1220 u8 bit;
1221 int err = 0, sda;
1222
1223 for (bit = 0 ; bit < 8 ; bit++) {
1224 sda = (v & 0x80) ? 2 : 0;
1225 v <<= 1;
1226 /* SDE=1, SDA=sda, SCL=0 */
1227 err += w9968cf_write_sb(cam, 0x10 | sda);
1228 /* SDE=1, SDA=sda, SCL=1 */
1229 err += w9968cf_write_sb(cam, 0x11 | sda);
1230 /* SDE=1, SDA=sda, SCL=0 */
1231 err += w9968cf_write_sb(cam, 0x10 | sda);
1232 }
1233
1234 return err;
1235 }
1236
1237
1238 static int w9968cf_smbus_read_byte(struct w9968cf_device* cam, u8* v)
1239 {
1240 u8 bit;
1241 int err = 0;
1242
1243 *v = 0;
1244 for (bit = 0 ; bit < 8 ; bit++) {
1245 *v <<= 1;
1246 err += w9968cf_write_sb(cam, 0x0013);
1247 *v |= (w9968cf_read_sb(cam) & 0x0008) ? 1 : 0;
1248 err += w9968cf_write_sb(cam, 0x0012);
1249 }
1250
1251 return err;
1252 }
1253
1254
1255 static int w9968cf_smbus_write_ack(struct w9968cf_device* cam)
1256 {
1257 int err = 0;
1258
1259 err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
1260 err += w9968cf_write_sb(cam, 0x0011); /* SDE=1, SDA=0, SCL=1 */
1261 err += w9968cf_write_sb(cam, 0x0010); /* SDE=1, SDA=0, SCL=0 */
1262
1263 return err;
1264 }
1265
1266
1267 static int w9968cf_smbus_read_ack(struct w9968cf_device* cam)
1268 {
1269 int err = 0, sda;
1270
1271 err += w9968cf_write_sb(cam, 0x0013); /* SDE=1, SDA=1, SCL=1 */
1272 sda = (w9968cf_read_sb(cam) & 0x08) ? 1 : 0; /* sda = SDA */
1273 err += w9968cf_write_sb(cam, 0x0012); /* SDE=1, SDA=1, SCL=0 */
1274 if (sda < 0)
1275 err += sda;
1276 if (sda == 1) {
1277 DBG(6, "Couldn't receive the ACK")
1278 err += -1;
1279 }
1280
1281 return err;
1282 }
1283
1284
1285 /* This seems to refresh the communication through the serial bus */
1286 static int w9968cf_smbus_refresh_bus(struct w9968cf_device* cam)
1287 {
1288 int err = 0, j;
1289
1290 for (j = 1; j <= 10; j++) {
1291 err = w9968cf_write_reg(cam, 0x0020, 0x01);
1292 err += w9968cf_write_reg(cam, 0x0000, 0x01);
1293 if (err)
1294 break;
1295 }
1296
1297 return err;
1298 }
1299
1300
1301 /* SMBus protocol: S Addr Wr [A] Subaddr [A] Value [A] P */
1302 static int
1303 w9968cf_i2c_adap_fastwrite_byte_data(struct w9968cf_device* cam,
1304 u16 address, u8 subaddress,u8 value)
1305 {
1306 u16* data = cam->data_buffer;
1307 int err = 0;
1308
1309 err += w9968cf_smbus_refresh_bus(cam);
1310
1311 /* Enable SBUS outputs */
1312 err += w9968cf_write_sb(cam, 0x0020);
1313
1314 data[0] = 0x082f | ((address & 0x80) ? 0x1500 : 0x0);
1315 data[0] |= (address & 0x40) ? 0x4000 : 0x0;
1316 data[1] = 0x2082 | ((address & 0x40) ? 0x0005 : 0x0);
1317 data[1] |= (address & 0x20) ? 0x0150 : 0x0;
1318 data[1] |= (address & 0x10) ? 0x5400 : 0x0;
1319 data[2] = 0x8208 | ((address & 0x08) ? 0x0015 : 0x0);
1320 data[2] |= (address & 0x04) ? 0x0540 : 0x0;
1321 data[2] |= (address & 0x02) ? 0x5000 : 0x0;
1322 data[3] = 0x1d20 | ((address & 0x02) ? 0x0001 : 0x0);
1323 data[3] |= (address & 0x01) ? 0x0054 : 0x0;
1324
1325 err += w9968cf_write_fsb(cam, data);
1326
1327 data[0] = 0x8208 | ((subaddress & 0x80) ? 0x0015 : 0x0);
1328 data[0] |= (subaddress & 0x40) ? 0x0540 : 0x0;
1329 data[0] |= (subaddress & 0x20) ? 0x5000 : 0x0;
1330 data[1] = 0x0820 | ((subaddress & 0x20) ? 0x0001 : 0x0);
1331 data[1] |= (subaddress & 0x10) ? 0x0054 : 0x0;
1332 data[1] |= (subaddress & 0x08) ? 0x1500 : 0x0;
1333 data[1] |= (subaddress & 0x04) ? 0x4000 : 0x0;
1334 data[2] = 0x2082 | ((subaddress & 0x04) ? 0x0005 : 0x0);
1335 data[2] |= (subaddress & 0x02) ? 0x0150 : 0x0;
1336 data[2] |= (subaddress & 0x01) ? 0x5400 : 0x0;
1337 data[3] = 0x001d;
1338
1339 err += w9968cf_write_fsb(cam, data);
1340
1341 data[0] = 0x8208 | ((value & 0x80) ? 0x0015 : 0x0);
1342 data[0] |= (value & 0x40) ? 0x0540 : 0x0;
1343 data[0] |= (value & 0x20) ? 0x5000 : 0x0;
1344 data[1] = 0x0820 | ((value & 0x20) ? 0x0001 : 0x0);
1345 data[1] |= (value & 0x10) ? 0x0054 : 0x0;
1346 data[1] |= (value & 0x08) ? 0x1500 : 0x0;
1347 data[1] |= (value & 0x04) ? 0x4000 : 0x0;
1348 data[2] = 0x2082 | ((value & 0x04) ? 0x0005 : 0x0);
1349 data[2] |= (value & 0x02) ? 0x0150 : 0x0;
1350 data[2] |= (value & 0x01) ? 0x5400 : 0x0;
1351 data[3] = 0xfe1d;
1352
1353 err += w9968cf_write_fsb(cam, data);
1354
1355 /* Disable SBUS outputs */
1356 err += w9968cf_write_sb(cam, 0x0000);
1357
1358 if (!err)
1359 DBG(5, "I2C write byte data done, addr.0x%04X, subaddr.0x%02X "
1360 "value 0x%02X", address, subaddress, value)
1361 else
1362 DBG(5, "I2C write byte data failed, addr.0x%04X, "
1363 "subaddr.0x%02X, value 0x%02X",
1364 address, subaddress, value)
1365
1366 return err;
1367 }
1368
1369
1370 /* SMBus protocol: S Addr Wr [A] Subaddr [A] P S Addr+1 Rd [A] [Value] NA P */
1371 static int
1372 w9968cf_i2c_adap_read_byte_data(struct w9968cf_device* cam,
1373 u16 address, u8 subaddress,
1374 u8* value)
1375 {
1376 int err = 0;
1377
1378 /* Serial data enable */
1379 err += w9968cf_write_sb(cam, 0x0013); /* don't change ! */
1380
1381 err += w9968cf_smbus_start(cam);
1382 err += w9968cf_smbus_write_byte(cam, address);
1383 err += w9968cf_smbus_read_ack(cam);
1384 err += w9968cf_smbus_write_byte(cam, subaddress);
1385 err += w9968cf_smbus_read_ack(cam);
1386 err += w9968cf_smbus_stop(cam);
1387 err += w9968cf_smbus_start(cam);
1388 err += w9968cf_smbus_write_byte(cam, address + 1);
1389 err += w9968cf_smbus_read_ack(cam);
1390 err += w9968cf_smbus_read_byte(cam, value);
1391 err += w9968cf_smbus_write_ack(cam);
1392 err += w9968cf_smbus_stop(cam);
1393
1394 /* Serial data disable */
1395 err += w9968cf_write_sb(cam, 0x0000);
1396
1397 if (!err)
1398 DBG(5, "I2C read byte data done, addr.0x%04X, "
1399 "subaddr.0x%02X, value 0x%02X",
1400 address, subaddress, *value)
1401 else
1402 DBG(5, "I2C read byte data failed, addr.0x%04X, "
1403 "subaddr.0x%02X, wrong value 0x%02X",
1404 address, subaddress, *value)
1405
1406 return err;
1407 }
1408
1409
1410 /* SMBus protocol: S Addr+1 Rd [A] [Value] NA P */
1411 static int
1412 w9968cf_i2c_adap_read_byte(struct w9968cf_device* cam,
1413 u16 address, u8* value)
1414 {
1415 int err = 0;
1416
1417 /* Serial data enable */
1418 err += w9968cf_write_sb(cam, 0x0013);
1419
1420 err += w9968cf_smbus_start(cam);
1421 err += w9968cf_smbus_write_byte(cam, address + 1);
1422 err += w9968cf_smbus_read_ack(cam);
1423 err += w9968cf_smbus_read_byte(cam, value);
1424 err += w9968cf_smbus_write_ack(cam);
1425 err += w9968cf_smbus_stop(cam);
1426
1427 /* Serial data disable */
1428 err += w9968cf_write_sb(cam, 0x0000);
1429
1430 if (!err)
1431 DBG(5, "I2C read byte done, addr.0x%04X, "
1432 "value 0x%02X", address, *value)
1433 else
1434 DBG(5, "I2C read byte failed, addr.0x%04X, "
1435 "wrong value 0x%02X", address, *value)
1436
1437 return err;
1438 }
1439
1440
1441 /* SMBus protocol: S Addr Wr [A] Value [A] P */
1442 static int
1443 w9968cf_i2c_adap_write_byte(struct w9968cf_device* cam,
1444 u16 address, u8 value)
1445 {
1446 DBG(4, "i2c_write_byte() is an unsupported transfer mode")
1447 return -EINVAL;
1448 }
1449
1450
1451
1452 /****************************************************************************
1453 * I2C interface to kernel *
1454 ****************************************************************************/
1455
1456 static int
1457 w9968cf_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
1458 unsigned short flags, char read_write, u8 command,
1459 int size, union i2c_smbus_data *data)
1460 {
1461 struct w9968cf_device* cam = i2c_get_adapdata(adapter);
1462 u8 i;
1463 int err = 0;
1464
1465 switch (addr) {
1466 case OV6xx0_SID:
1467 case OV7xx0_SID:
1468 break;
1469 default:
1470 DBG(4, "Rejected slave ID 0x%04X", addr)
1471 return -EINVAL;
1472 }
1473
1474 if (size == I2C_SMBUS_BYTE) {
1475 /* Why addr <<= 1? See OVXXX0_SID defines in ovcamchip.h */
1476 addr <<= 1;
1477
1478 if (read_write == I2C_SMBUS_WRITE)
1479 err = w9968cf_i2c_adap_write_byte(cam, addr, command);
1480 else if (read_write == I2C_SMBUS_READ)
1481 err = w9968cf_i2c_adap_read_byte(cam,addr,&data->byte);
1482
1483 } else if (size == I2C_SMBUS_BYTE_DATA) {
1484 addr <<= 1;
1485
1486 if (read_write == I2C_SMBUS_WRITE)
1487 err = w9968cf_i2c_adap_fastwrite_byte_data(cam, addr,
1488 command, data->byte);
1489 else if (read_write == I2C_SMBUS_READ) {
1490 for (i = 1; i <= W9968CF_I2C_RW_RETRIES; i++) {
1491 err = w9968cf_i2c_adap_read_byte_data(cam,addr,
1492 command, &data->byte);
1493 if (err) {
1494 if (w9968cf_smbus_refresh_bus(cam)) {
1495 err = -EIO;
1496 break;
1497 }
1498 } else
1499 break;
1500 }
1501
1502 } else
1503 return -EINVAL;
1504
1505 } else {
1506 DBG(4, "Unsupported I2C transfer mode (%d)", size)
1507 return -EINVAL;
1508 }
1509
1510 return err;
1511 }
1512
1513
1514 static u32 w9968cf_i2c_func(struct i2c_adapter* adap)
1515 {
1516 return I2C_FUNC_SMBUS_READ_BYTE |
1517 I2C_FUNC_SMBUS_READ_BYTE_DATA |
1518 I2C_FUNC_SMBUS_WRITE_BYTE_DATA;
1519 }
1520
1521
1522 static int w9968cf_i2c_attach_inform(struct i2c_client* client)
1523 {
1524 struct w9968cf_device* cam = i2c_get_adapdata(client->adapter);
1525 int id = client->driver->id, err = 0;
1526
1527 if (id == I2C_DRIVERID_OVCAMCHIP) {
1528 cam->sensor_client = client;
1529 err = w9968cf_sensor_init(cam);
1530 if (err) {
1531 cam->sensor_client = NULL;
1532 return err;
1533 }
1534 } else {
1535 DBG(4, "Rejected client [%s] with driver [%s]",
1536 client->name, client->driver->driver.name)
1537 return -EINVAL;
1538 }
1539
1540 DBG(5, "I2C attach client [%s] with driver [%s]",
1541 client->name, client->driver->driver.name)
1542
1543 return 0;
1544 }
1545
1546
1547 static int w9968cf_i2c_detach_inform(struct i2c_client* client)
1548 {
1549 struct w9968cf_device* cam = i2c_get_adapdata(client->adapter);
1550
1551 if (cam->sensor_client == client)
1552 cam->sensor_client = NULL;
1553
1554 DBG(5, "I2C detach client [%s]", client->name)
1555
1556 return 0;
1557 }
1558
1559
1560 static int
1561 w9968cf_i2c_control(struct i2c_adapter* adapter, unsigned int cmd,
1562 unsigned long arg)
1563 {
1564 return 0;
1565 }
1566
1567
1568 static int w9968cf_i2c_init(struct w9968cf_device* cam)
1569 {
1570 int err = 0;
1571
1572 static struct i2c_algorithm algo = {
1573 .smbus_xfer = w9968cf_i2c_smbus_xfer,
1574 .algo_control = w9968cf_i2c_control,
1575 .functionality = w9968cf_i2c_func,
1576 };
1577
1578 static struct i2c_adapter adap = {
1579 .id = I2C_HW_SMBUS_W9968CF,
1580 .class = I2C_CLASS_CAM_DIGITAL,
1581 .owner = THIS_MODULE,
1582 .client_register = w9968cf_i2c_attach_inform,
1583 .client_unregister = w9968cf_i2c_detach_inform,
1584 .algo = &algo,
1585 };
1586
1587 memcpy(&cam->i2c_adapter, &adap, sizeof(struct i2c_adapter));
1588 strcpy(cam->i2c_adapter.name, "w9968cf");
1589 i2c_set_adapdata(&cam->i2c_adapter, cam);
1590
1591 DBG(6, "Registering I2C adapter with kernel...")
1592
1593 err = i2c_add_adapter(&cam->i2c_adapter);
1594 if (err)
1595 DBG(1, "Failed to register the I2C adapter")
1596 else
1597 DBG(5, "I2C adapter registered")
1598
1599 return err;
1600 }
1601
1602
1603
1604 /****************************************************************************
1605 * Helper functions *
1606 ****************************************************************************/
1607
1608 /*--------------------------------------------------------------------------
1609 Turn on the LED on some webcams. A beep should be heard too.
1610 Return 0 on success, a negative number otherwise.
1611 --------------------------------------------------------------------------*/
1612 static int w9968cf_turn_on_led(struct w9968cf_device* cam)
1613 {
1614 int err = 0;
1615
1616 err += w9968cf_write_reg(cam, 0xff00, 0x00); /* power-down */
1617 err += w9968cf_write_reg(cam, 0xbf17, 0x00); /* reset everything */
1618 err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* normal operation */
1619 err += w9968cf_write_reg(cam, 0x0010, 0x01); /* serial bus, SDS high */
1620 err += w9968cf_write_reg(cam, 0x0000, 0x01); /* serial bus, SDS low */
1621 err += w9968cf_write_reg(cam, 0x0010, 0x01); /* ..high 'beep-beep' */
1622
1623 if (err)
1624 DBG(2, "Couldn't turn on the LED")
1625
1626 DBG(5, "LED turned on")
1627
1628 return err;
1629 }
1630
1631
1632 /*--------------------------------------------------------------------------
1633 Write some registers for the device initialization.
1634 This function is called once on open().
1635 Return 0 on success, a negative number otherwise.
1636 --------------------------------------------------------------------------*/
1637 static int w9968cf_init_chip(struct w9968cf_device* cam)
1638 {
1639 unsigned long hw_bufsize = cam->maxwidth*cam->maxheight*2,
1640 y0 = 0x0000,
1641 u0 = y0 + hw_bufsize/2,
1642 v0 = u0 + hw_bufsize/4,
1643 y1 = v0 + hw_bufsize/4,
1644 u1 = y1 + hw_bufsize/2,
1645 v1 = u1 + hw_bufsize/4;
1646 int err = 0;
1647
1648 err += w9968cf_write_reg(cam, 0xff00, 0x00); /* power off */
1649 err += w9968cf_write_reg(cam, 0xbf10, 0x00); /* power on */
1650
1651 err += w9968cf_write_reg(cam, 0x405d, 0x03); /* DRAM timings */
1652 err += w9968cf_write_reg(cam, 0x0030, 0x04); /* SDRAM timings */
1653
1654 err += w9968cf_write_reg(cam, y0 & 0xffff, 0x20); /* Y buf.0, low */
1655 err += w9968cf_write_reg(cam, y0 >> 16, 0x21); /* Y buf.0, high */
1656 err += w9968cf_write_reg(cam, u0 & 0xffff, 0x24); /* U buf.0, low */
1657 err += w9968cf_write_reg(cam, u0 >> 16, 0x25); /* U buf.0, high */
1658 err += w9968cf_write_reg(cam, v0 & 0xffff, 0x28); /* V buf.0, low */
1659 err += w9968cf_write_reg(cam, v0 >> 16, 0x29); /* V buf.0, high */
1660
1661 err += w9968cf_write_reg(cam, y1 & 0xffff, 0x22); /* Y buf.1, low */
1662 err += w9968cf_write_reg(cam, y1 >> 16, 0x23); /* Y buf.1, high */
1663 err += w9968cf_write_reg(cam, u1 & 0xffff, 0x26); /* U buf.1, low */
1664 err += w9968cf_write_reg(cam, u1 >> 16, 0x27); /* U buf.1, high */
1665 err += w9968cf_write_reg(cam, v1 & 0xffff, 0x2a); /* V buf.1, low */
1666 err += w9968cf_write_reg(cam, v1 >> 16, 0x2b); /* V buf.1, high */
1667
1668 err += w9968cf_write_reg(cam, y1 & 0xffff, 0x32); /* JPEG buf 0 low */
1669 err += w9968cf_write_reg(cam, y1 >> 16, 0x33); /* JPEG buf 0 high */
1670
1671 err += w9968cf_write_reg(cam, y1 & 0xffff, 0x34); /* JPEG buf 1 low */
1672 err += w9968cf_write_reg(cam, y1 >> 16, 0x35); /* JPEG bug 1 high */
1673
1674 err += w9968cf_write_reg(cam, 0x0000, 0x36);/* JPEG restart interval */
1675 err += w9968cf_write_reg(cam, 0x0804, 0x37);/*JPEG VLE FIFO threshold*/
1676 err += w9968cf_write_reg(cam, 0x0000, 0x38);/* disable hw up-scaling */
1677 err += w9968cf_write_reg(cam, 0x0000, 0x3f); /* JPEG/MCTL test data */
1678
1679 err += w9968cf_set_picture(cam, cam->picture); /* this before */
1680 err += w9968cf_set_window(cam, cam->window);
1681
1682 if (err)
1683 DBG(1, "Chip initialization failed")
1684 else
1685 DBG(5, "Chip successfully initialized")
1686
1687 return err;
1688 }
1689
1690
1691 /*--------------------------------------------------------------------------
1692 Return non-zero if the palette is supported, 0 otherwise.
1693 --------------------------------------------------------------------------*/
1694 static inline u16 w9968cf_valid_palette(u16 palette)
1695 {
1696 u8 i = 0;
1697 while (w9968cf_formatlist[i].palette != 0) {
1698 if (palette == w9968cf_formatlist[i].palette)
1699 return palette;
1700 i++;
1701 }
1702 return 0;
1703 }
1704
1705
1706 /*--------------------------------------------------------------------------
1707 Return the depth corresponding to the given palette.
1708 Palette _must_ be supported !
1709 --------------------------------------------------------------------------*/
1710 static inline u16 w9968cf_valid_depth(u16 palette)
1711 {
1712 u8 i=0;
1713 while (w9968cf_formatlist[i].palette != palette)
1714 i++;
1715
1716 return w9968cf_formatlist[i].depth;
1717 }
1718
1719
1720 /*--------------------------------------------------------------------------
1721 Return non-zero if the format requires decompression, 0 otherwise.
1722 --------------------------------------------------------------------------*/
1723 static inline u8 w9968cf_need_decompression(u16 palette)
1724 {
1725 u8 i = 0;
1726 while (w9968cf_formatlist[i].palette != 0) {
1727 if (palette == w9968cf_formatlist[i].palette)
1728 return w9968cf_formatlist[i].compression;
1729 i++;
1730 }
1731 return 0;
1732 }
1733
1734
1735 /*--------------------------------------------------------------------------
1736 Change the picture settings of the camera.
1737 Return 0 on success, a negative number otherwise.
1738 --------------------------------------------------------------------------*/
1739 static int
1740 w9968cf_set_picture(struct w9968cf_device* cam, struct video_picture pict)
1741 {
1742 u16 fmt, hw_depth, hw_palette, reg_v = 0x0000;
1743 int err = 0;
1744
1745 /* Make sure we are using a valid depth */
1746 pict.depth = w9968cf_valid_depth(pict.palette);
1747
1748 fmt = pict.palette;
1749
1750 hw_depth = pict.depth; /* depth used by the winbond chip */
1751 hw_palette = pict.palette; /* palette used by the winbond chip */
1752
1753 /* VS & HS polarities */
1754 reg_v = (cam->vs_polarity << 12) | (cam->hs_polarity << 11);
1755
1756 switch (fmt)
1757 {
1758 case VIDEO_PALETTE_UYVY:
1759 reg_v |= 0x0000;
1760 cam->vpp_flag = VPP_NONE;
1761 break;
1762 case VIDEO_PALETTE_YUV422P:
1763 reg_v |= 0x0002;
1764 cam->vpp_flag = VPP_DECOMPRESSION;
1765 break;
1766 case VIDEO_PALETTE_YUV420:
1767 case VIDEO_PALETTE_YUV420P:
1768 reg_v |= 0x0003;
1769 cam->vpp_flag = VPP_DECOMPRESSION;
1770 break;
1771 case VIDEO_PALETTE_YUYV:
1772 case VIDEO_PALETTE_YUV422:
1773 reg_v |= 0x0000;
1774 cam->vpp_flag = VPP_SWAP_YUV_BYTES;
1775 hw_palette = VIDEO_PALETTE_UYVY;
1776 break;
1777 /* Original video is used instead of RGBX palettes.
1778 Software conversion later. */
1779 case VIDEO_PALETTE_GREY:
1780 case VIDEO_PALETTE_RGB555:
1781 case VIDEO_PALETTE_RGB565:
1782 case VIDEO_PALETTE_RGB24:
1783 case VIDEO_PALETTE_RGB32:
1784 reg_v |= 0x0000; /* UYVY 16 bit is used */
1785 hw_depth = 16;
1786 hw_palette = VIDEO_PALETTE_UYVY;
1787 cam->vpp_flag = VPP_UYVY_TO_RGBX;
1788 break;
1789 }
1790
1791 /* NOTE: due to memory issues, it is better to disable the hardware
1792 double buffering during compression */
1793 if (cam->double_buffer && !(cam->vpp_flag & VPP_DECOMPRESSION))
1794 reg_v |= 0x0080;
1795
1796 if (cam->clamping)
1797 reg_v |= 0x0020;
1798
1799 if (cam->filter_type == 1)
1800 reg_v |= 0x0008;
1801 else if (cam->filter_type == 2)
1802 reg_v |= 0x000c;
1803
1804 if ((err = w9968cf_write_reg(cam, reg_v, 0x16)))
1805 goto error;
1806
1807 if ((err = w9968cf_sensor_update_picture(cam, pict)))
1808 goto error;
1809
1810 /* If all went well, update the device data structure */
1811 memcpy(&cam->picture, &pict, sizeof(pict));
1812 cam->hw_depth = hw_depth;
1813 cam->hw_palette = hw_palette;
1814
1815 /* Settings changed, so we clear the frame buffers */
1816 memset(cam->frame[0].buffer, 0, cam->nbuffers*cam->frame[0].size);
1817
1818 DBG(4, "Palette is %s, depth is %u bpp",
1819 symbolic(v4l1_plist, pict.palette), pict.depth)
1820
1821 return 0;
1822
1823 error:
1824 DBG(1, "Failed to change picture settings")
1825 return err;
1826 }
1827
1828
1829 /*--------------------------------------------------------------------------
1830 Change the capture area size of the camera.
1831 This function _must_ be called _after_ w9968cf_set_picture().
1832 Return 0 on success, a negative number otherwise.
1833 --------------------------------------------------------------------------*/
1834 static int
1835 w9968cf_set_window(struct w9968cf_device* cam, struct video_window win)
1836 {
1837 u16 x, y, w, h, scx, scy, cw, ch, ax, ay;
1838 unsigned long fw, fh;
1839 struct ovcamchip_window s_win;
1840 int err = 0;
1841
1842 /* Work around to avoid FP arithmetics */
1843 #define __SC(x) ((x) << 10)
1844 #define __UNSC(x) ((x) >> 10)
1845
1846 /* Make sure we are using a supported resolution */
1847 if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width,
1848 (u16*)&win.height)))
1849 goto error;
1850
1851 /* Scaling factors */
1852 fw = __SC(win.width) / cam->maxwidth;
1853 fh = __SC(win.height) / cam->maxheight;
1854
1855 /* Set up the width and height values used by the chip */
1856 if ((win.width > cam->maxwidth) || (win.height > cam->maxheight)) {
1857 cam->vpp_flag |= VPP_UPSCALE;
1858 /* Calculate largest w,h mantaining the same w/h ratio */
1859 w = (fw >= fh) ? cam->maxwidth : __SC(win.width)/fh;
1860 h = (fw >= fh) ? __SC(win.height)/fw : cam->maxheight;
1861 if (w < cam->minwidth) /* just in case */
1862 w = cam->minwidth;
1863 if (h < cam->minheight) /* just in case */
1864 h = cam->minheight;
1865 } else {
1866 cam->vpp_flag &= ~VPP_UPSCALE;
1867 w = win.width;
1868 h = win.height;
1869 }
1870
1871 /* x,y offsets of the cropped area */
1872 scx = cam->start_cropx;
1873 scy = cam->start_cropy;
1874
1875 /* Calculate cropped area manteining the right w/h ratio */
1876 if (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE)) {
1877 cw = (fw >= fh) ? cam->maxwidth : __SC(win.width)/fh;
1878 ch = (fw >= fh) ? __SC(win.height)/fw : cam->maxheight;
1879 } else {
1880 cw = w;
1881 ch = h;
1882 }
1883
1884 /* Setup the window of the sensor */
1885 s_win.format = VIDEO_PALETTE_UYVY;
1886 s_win.width = cam->maxwidth;
1887 s_win.height = cam->maxheight;
1888 s_win.quarter = 0; /* full progressive video */
1889
1890 /* Center it */
1891 s_win.x = (s_win.width - cw) / 2;
1892 s_win.y = (s_win.height - ch) / 2;
1893
1894 /* Clock divisor */
1895 if (cam->clockdiv >= 0)
1896 s_win.clockdiv = cam->clockdiv; /* manual override */
1897 else
1898 switch (cam->sensor) {
1899 case CC_OV6620:
1900 s_win.clockdiv = 0;
1901 break;
1902 case CC_OV6630:
1903 s_win.clockdiv = 0;
1904 break;
1905 case CC_OV76BE:
1906 case CC_OV7610:
1907 case CC_OV7620:
1908 s_win.clockdiv = 0;
1909 break;
1910 default:
1911 s_win.clockdiv = W9968CF_DEF_CLOCKDIVISOR;
1912 }
1913
1914 /* We have to scale win.x and win.y offsets */
1915 if ( (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE))
1916 || (cam->vpp_flag & VPP_UPSCALE) ) {
1917 ax = __SC(win.x)/fw;
1918 ay = __SC(win.y)/fh;
1919 } else {
1920 ax = win.x;
1921 ay = win.y;
1922 }
1923
1924 if ((ax + cw) > cam->maxwidth)
1925 ax = cam->maxwidth - cw;
1926
1927 if ((ay + ch) > cam->maxheight)
1928 ay = cam->maxheight - ch;
1929
1930 /* Adjust win.x, win.y */
1931 if ( (cam->largeview && !(cam->vpp_flag & VPP_UPSCALE))
1932 || (cam->vpp_flag & VPP_UPSCALE) ) {
1933 win.x = __UNSC(ax*fw);
1934 win.y = __UNSC(ay*fh);
1935 } else {
1936 win.x = ax;
1937 win.y = ay;
1938 }
1939
1940 /* Offsets used by the chip */
1941 x = ax + s_win.x;
1942 y = ay + s_win.y;
1943
1944 /* Go ! */
1945 if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_S_MODE, &s_win)))
1946 goto error;
1947
1948 err += w9968cf_write_reg(cam, scx + x, 0x10);
1949 err += w9968cf_write_reg(cam, scy + y, 0x11);
1950 err += w9968cf_write_reg(cam, scx + x + cw, 0x12);
1951 err += w9968cf_write_reg(cam, scy + y + ch, 0x13);
1952 err += w9968cf_write_reg(cam, w, 0x14);
1953 err += w9968cf_write_reg(cam, h, 0x15);
1954
1955 /* JPEG width & height */
1956 err += w9968cf_write_reg(cam, w, 0x30);
1957 err += w9968cf_write_reg(cam, h, 0x31);
1958
1959 /* Y & UV frame buffer strides (in WORD) */
1960 if (cam->vpp_flag & VPP_DECOMPRESSION) {
1961 err += w9968cf_write_reg(cam, w/2, 0x2c);
1962 err += w9968cf_write_reg(cam, w/4, 0x2d);
1963 } else
1964 err += w9968cf_write_reg(cam, w, 0x2c);
1965
1966 if (err)
1967 goto error;
1968
1969 /* If all went well, update the device data structure */
1970 memcpy(&cam->window, &win, sizeof(win));
1971 cam->hw_width = w;
1972 cam->hw_height = h;
1973
1974 /* Settings changed, so we clear the frame buffers */
1975 memset(cam->frame[0].buffer, 0, cam->nbuffers*cam->frame[0].size);
1976
1977 DBG(4, "The capture area is %dx%d, Offset (x,y)=(%u,%u)",
1978 win.width, win.height, win.x, win.y)
1979
1980 PDBGG("x=%u ,y=%u, w=%u, h=%u, ax=%u, ay=%u, s_win.x=%u, s_win.y=%u, "
1981 "cw=%u, ch=%u, win.x=%u, win.y=%u, win.width=%u, win.height=%u",
1982 x, y, w, h, ax, ay, s_win.x, s_win.y, cw, ch, win.x, win.y,
1983 win.width, win.height)
1984
1985 return 0;
1986
1987 error:
1988 DBG(1, "Failed to change the capture area size")
1989 return err;
1990 }
1991
1992
1993 /*--------------------------------------------------------------------------
1994 Adjust the asked values for window width and height.
1995 Return 0 on success, -1 otherwise.
1996 --------------------------------------------------------------------------*/
1997 static int
1998 w9968cf_adjust_window_size(struct w9968cf_device* cam, u16* width, u16* height)
1999 {
2000 u16 maxw, maxh;
2001
2002 if ((*width < cam->minwidth) || (*height < cam->minheight))
2003 return -ERANGE;
2004
2005 maxw = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) &&
2006 w9968cf_vpp ? max((u16)W9968CF_MAX_WIDTH, cam->maxwidth)
2007 : cam->maxwidth;
2008 maxh = cam->upscaling && !(cam->vpp_flag & VPP_DECOMPRESSION) &&
2009 w9968cf_vpp ? max((u16)W9968CF_MAX_HEIGHT, cam->maxheight)
2010 : cam->maxheight;
2011
2012 if (*width > maxw)
2013 *width = maxw;
2014 if (*height > maxh)
2015 *height = maxh;
2016
2017 if (cam->vpp_flag & VPP_DECOMPRESSION) {
2018 *width &= ~15L; /* multiple of 16 */
2019 *height &= ~15L;
2020 }
2021
2022 PDBGG("Window size adjusted w=%u, h=%u ", *width, *height)
2023
2024 return 0;
2025 }
2026
2027
2028 /*--------------------------------------------------------------------------
2029 Initialize the FIFO list of requested frames.
2030 --------------------------------------------------------------------------*/
2031 static void w9968cf_init_framelist(struct w9968cf_device* cam)
2032 {
2033 u8 i;
2034
2035 for (i = 0; i < cam->nbuffers; i++) {
2036 cam->requested_frame[i] = NULL;
2037 cam->frame[i].queued = 0;
2038 cam->frame[i].status = F_UNUSED;
2039 }
2040 }
2041
2042
2043 /*--------------------------------------------------------------------------
2044 Add a frame in the FIFO list of requested frames.
2045 This function is called in process context.
2046 --------------------------------------------------------------------------*/
2047 static void w9968cf_push_frame(struct w9968cf_device* cam, u8 f_num)
2048 {
2049 u8 f;
2050 unsigned long lock_flags;
2051
2052 spin_lock_irqsave(&cam->flist_lock, lock_flags);
2053
2054 for (f=0; cam->requested_frame[f] != NULL; f++);
2055 cam->requested_frame[f] = &cam->frame[f_num];
2056 cam->frame[f_num].queued = 1;
2057 cam->frame[f_num].status = F_UNUSED; /* clear the status */
2058
2059 spin_unlock_irqrestore(&cam->flist_lock, lock_flags);
2060
2061 DBG(6, "Frame #%u pushed into the FIFO list. Position %u", f_num, f)
2062 }
2063
2064
2065 /*--------------------------------------------------------------------------
2066 Read, store and remove the first pointer in the FIFO list of requested
2067 frames. This function is called in interrupt context.
2068 --------------------------------------------------------------------------*/
2069 static void
2070 w9968cf_pop_frame(struct w9968cf_device* cam, struct w9968cf_frame_t** framep)
2071 {
2072 u8 i;
2073
2074 spin_lock(&cam->flist_lock);
2075
2076 *framep = cam->requested_frame[0];
2077
2078 /* Shift the list of pointers */
2079 for (i = 0; i < cam->nbuffers-1; i++)
2080 cam->requested_frame[i] = cam->requested_frame[i+1];
2081 cam->requested_frame[i] = NULL;
2082
2083 spin_unlock(&cam->flist_lock);
2084
2085 DBG(6,"Popped frame #%d from the list", (*framep)->number)
2086 }
2087
2088
2089 /*--------------------------------------------------------------------------
2090 High-level video post-processing routine on grabbed frames.
2091 Return 0 on success, a negative number otherwise.
2092 --------------------------------------------------------------------------*/
2093 static int
2094 w9968cf_postprocess_frame(struct w9968cf_device* cam,
2095 struct w9968cf_frame_t* fr)
2096 {
2097 void *pIn = fr->buffer, *pOut = cam->frame_vpp.buffer, *tmp;
2098 u16 w = cam->window.width,
2099 h = cam->window.height,
2100 d = cam->picture.depth,
2101 fmt = cam->picture.palette,
2102 rgb = cam->force_rgb,
2103 hw_w = cam->hw_width,
2104 hw_h = cam->hw_height,
2105 hw_d = cam->hw_depth;
2106 int err = 0;
2107
2108 #define _PSWAP(pIn, pOut) {tmp = (pIn); (pIn) = (pOut); (pOut) = tmp;}
2109
2110 if (cam->vpp_flag & VPP_DECOMPRESSION) {
2111 memcpy(pOut, pIn, fr->length);
2112 _PSWAP(pIn, pOut)
2113 err = w9968cf_vpp->decode(pIn, fr->length, hw_w, hw_h, pOut);
2114 PDBGG("Compressed frame length: %lu",(unsigned long)fr->length)
2115 fr->length = (hw_w*hw_h*hw_d)/8;
2116 _PSWAP(pIn, pOut)
2117 if (err) {
2118 DBG(4, "An error occurred while decoding the frame: "
2119 "%s", symbolic(decoder_errlist, err))
2120 return err;
2121 } else
2122 DBG(6, "Frame decoded")
2123 }
2124
2125 if (cam->vpp_flag & VPP_SWAP_YUV_BYTES) {
2126 w9968cf_vpp->swap_yuvbytes(pIn, fr->length);
2127 DBG(6, "Original UYVY component ordering changed")
2128 }
2129
2130 if (cam->vpp_flag & VPP_UPSCALE) {
2131 w9968cf_vpp->scale_up(pIn, pOut, hw_w, hw_h, hw_d, w, h);
2132 fr->length = (w*h*hw_d)/8;
2133 _PSWAP(pIn, pOut)
2134 DBG(6, "Vertical up-scaling done: %u,%u,%ubpp->%u,%u",
2135 hw_w, hw_h, hw_d, w, h)
2136 }
2137
2138 if (cam->vpp_flag & VPP_UYVY_TO_RGBX) {
2139 w9968cf_vpp->uyvy_to_rgbx(pIn, fr->length, pOut, fmt, rgb);
2140 fr->length = (w*h*d)/8;
2141 _PSWAP(pIn, pOut)
2142 DBG(6, "UYVY-16bit to %s conversion done",
2143 symbolic(v4l1_plist, fmt))
2144 }
2145
2146 if (pOut == fr->buffer)
2147 memcpy(fr->buffer, cam->frame_vpp.buffer, fr->length);
2148
2149 return 0;
2150 }
2151
2152
2153
2154 /****************************************************************************
2155 * Image sensor control routines *
2156 ****************************************************************************/
2157
2158 static int
2159 w9968cf_sensor_set_control(struct w9968cf_device* cam, int cid, int val)
2160 {
2161 struct ovcamchip_control ctl;
2162 int err;
2163
2164 ctl.id = cid;
2165 ctl.value = val;
2166
2167 err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_S_CTRL, &ctl);
2168
2169 return err;
2170 }
2171
2172
2173 static int
2174 w9968cf_sensor_get_control(struct w9968cf_device* cam, int cid, int* val)
2175 {
2176 struct ovcamchip_control ctl;
2177 int err;
2178
2179 ctl.id = cid;
2180
2181 err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_G_CTRL, &ctl);
2182 if (!err)
2183 *val = ctl.value;
2184
2185 return err;
2186 }
2187
2188
2189 static int
2190 w9968cf_sensor_cmd(struct w9968cf_device* cam, unsigned int cmd, void* arg)
2191 {
2192 struct i2c_client* c = cam->sensor_client;
2193 int rc = 0;
2194
2195 if (!c || !c->driver || !c->driver->command)
2196 return -EINVAL;
2197
2198 rc = c->driver->command(c, cmd, arg);
2199 /* The I2C driver returns -EPERM on non-supported controls */
2200 return (rc < 0 && rc != -EPERM) ? rc : 0;
2201 }
2202
2203
2204 /*--------------------------------------------------------------------------
2205 Update some settings of the image sensor.
2206 Returns: 0 on success, a negative number otherwise.
2207 --------------------------------------------------------------------------*/
2208 static int w9968cf_sensor_update_settings(struct w9968cf_device* cam)
2209 {
2210 int err = 0;
2211
2212 /* Auto brightness */
2213 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_AUTOBRIGHT,
2214 cam->auto_brt);
2215 if (err)
2216 return err;
2217
2218 /* Auto exposure */
2219 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_AUTOEXP,
2220 cam->auto_exp);
2221 if (err)
2222 return err;
2223
2224 /* Banding filter */
2225 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BANDFILT,
2226 cam->bandfilt);
2227 if (err)
2228 return err;
2229
2230 /* Light frequency */
2231 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_FREQ,
2232 cam->lightfreq);
2233 if (err)
2234 return err;
2235
2236 /* Back light */
2237 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BACKLIGHT,
2238 cam->backlight);
2239 if (err)
2240 return err;
2241
2242 /* Mirror */
2243 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_MIRROR,
2244 cam->mirror);
2245 if (err)
2246 return err;
2247
2248 return 0;
2249 }
2250
2251
2252 /*--------------------------------------------------------------------------
2253 Get some current picture settings from the image sensor and update the
2254 internal 'picture' structure of the camera.
2255 Returns: 0 on success, a negative number otherwise.
2256 --------------------------------------------------------------------------*/
2257 static int w9968cf_sensor_get_picture(struct w9968cf_device* cam)
2258 {
2259 int err, v;
2260
2261 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_CONT, &v);
2262 if (err)
2263 return err;
2264 cam->picture.contrast = v;
2265
2266 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_BRIGHT, &v);
2267 if (err)
2268 return err;
2269 cam->picture.brightness = v;
2270
2271 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_SAT, &v);
2272 if (err)
2273 return err;
2274 cam->picture.colour = v;
2275
2276 err = w9968cf_sensor_get_control(cam, OVCAMCHIP_CID_HUE, &v);
2277 if (err)
2278 return err;
2279 cam->picture.hue = v;
2280
2281 DBG(5, "Got picture settings from the image sensor")
2282
2283 PDBGG("Brightness, contrast, hue, colour, whiteness are "
2284 "%u,%u,%u,%u,%u", cam->picture.brightness,cam->picture.contrast,
2285 cam->picture.hue, cam->picture.colour, cam->picture.whiteness)
2286
2287 return 0;
2288 }
2289
2290
2291 /*--------------------------------------------------------------------------
2292 Update picture settings of the image sensor.
2293 Returns: 0 on success, a negative number otherwise.
2294 --------------------------------------------------------------------------*/
2295 static int
2296 w9968cf_sensor_update_picture(struct w9968cf_device* cam,
2297 struct video_picture pict)
2298 {
2299 int err = 0;
2300
2301 if ((!cam->sensor_initialized)
2302 || pict.contrast != cam->picture.contrast) {
2303 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_CONT,
2304 pict.contrast);
2305 if (err)
2306 goto fail;
2307 DBG(4, "Contrast changed from %u to %u",
2308 cam->picture.contrast, pict.contrast)
2309 cam->picture.contrast = pict.contrast;
2310 }
2311
2312 if (((!cam->sensor_initialized) ||
2313 pict.brightness != cam->picture.brightness) && (!cam->auto_brt)) {
2314 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_BRIGHT,
2315 pict.brightness);
2316 if (err)
2317 goto fail;
2318 DBG(4, "Brightness changed from %u to %u",
2319 cam->picture.brightness, pict.brightness)
2320 cam->picture.brightness = pict.brightness;
2321 }
2322
2323 if ((!cam->sensor_initialized) || pict.colour != cam->picture.colour) {
2324 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_SAT,
2325 pict.colour);
2326 if (err)
2327 goto fail;
2328 DBG(4, "Colour changed from %u to %u",
2329 cam->picture.colour, pict.colour)
2330 cam->picture.colour = pict.colour;
2331 }
2332
2333 if ((!cam->sensor_initialized) || pict.hue != cam->picture.hue) {
2334 err = w9968cf_sensor_set_control(cam, OVCAMCHIP_CID_HUE,
2335 pict.hue);
2336 if (err)
2337 goto fail;
2338 DBG(4, "Hue changed from %u to %u",
2339 cam->picture.hue, pict.hue)
2340 cam->picture.hue = pict.hue;
2341 }
2342
2343 return 0;
2344
2345 fail:
2346 DBG(4, "Failed to change sensor picture setting")
2347 return err;
2348 }
2349
2350
2351
2352 /****************************************************************************
2353 * Camera configuration *
2354 ****************************************************************************/
2355
2356 /*--------------------------------------------------------------------------
2357 This function is called when a supported image sensor is detected.
2358 Return 0 if the initialization succeeds, a negative number otherwise.
2359 --------------------------------------------------------------------------*/
2360 static int w9968cf_sensor_init(struct w9968cf_device* cam)
2361 {
2362 int err = 0;
2363
2364 if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_INITIALIZE,
2365 &cam->monochrome)))
2366 goto error;
2367
2368 if ((err = w9968cf_sensor_cmd(cam, OVCAMCHIP_CMD_Q_SUBTYPE,
2369 &cam->sensor)))
2370 goto error;
2371
2372 /* NOTE: Make sure width and height are a multiple of 16 */
2373 switch (cam->sensor_client->addr) {
2374 case OV6xx0_SID:
2375 cam->maxwidth = 352;
2376 cam->maxheight = 288;
2377 cam->minwidth = 64;
2378 cam->minheight = 48;
2379 break;
2380 case OV7xx0_SID:
2381 cam->maxwidth = 640;
2382 cam->maxheight = 480;
2383 cam->minwidth = 64;
2384 cam->minheight = 48;
2385 break;
2386 default:
2387 DBG(1, "Not supported image sensor detected for %s",
2388 symbolic(camlist, cam->id))
2389 return -EINVAL;
2390 }
2391
2392 /* These values depend on the ones in the ovxxx0.c sources */
2393 switch (cam->sensor) {
2394 case CC_OV7620:
2395 cam->start_cropx = 287;
2396 cam->start_cropy = 35;
2397 /* Seems to work around a bug in the image sensor */
2398 cam->vs_polarity = 1;
2399 cam->hs_polarity = 1;
2400 break;
2401 default:
2402 cam->start_cropx = 320;
2403 cam->start_cropy = 35;
2404 cam->vs_polarity = 1;
2405 cam->hs_polarity = 0;
2406 }
2407
2408 if ((err = w9968cf_sensor_update_settings(cam)))
2409 goto error;
2410
2411 if ((err = w9968cf_sensor_update_picture(cam, cam->picture)))
2412 goto error;
2413
2414 cam->sensor_initialized = 1;
2415
2416 DBG(2, "%s image sensor initialized", symbolic(senlist, cam->sensor))
2417 return 0;
2418
2419 error:
2420 cam->sensor_initialized = 0;
2421 cam->sensor = CC_UNKNOWN;
2422 DBG(1, "Image sensor initialization failed for %s (/dev/video%d). "
2423 "Try to detach and attach this device again",
2424 symbolic(camlist, cam->id), cam->v4ldev->minor)
2425 return err;
2426 }
2427
2428
2429 /*--------------------------------------------------------------------------
2430 Fill some basic fields in the main device data structure.
2431 This function is called once on w9968cf_usb_probe() for each recognized
2432 camera.
2433 --------------------------------------------------------------------------*/
2434 static void
2435 w9968cf_configure_camera(struct w9968cf_device* cam,
2436 struct usb_device* udev,
2437 enum w9968cf_model_id mod_id,
2438 const unsigned short dev_nr)
2439 {
2440 init_MUTEX(&cam->fileop_sem);
2441 init_waitqueue_head(&cam->open);
2442 spin_lock_init(&cam->urb_lock);
2443 spin_lock_init(&cam->flist_lock);
2444
2445 cam->users = 0;
2446 cam->disconnected = 0;
2447 cam->id = mod_id;
2448 cam->sensor = CC_UNKNOWN;
2449 cam->sensor_initialized = 0;
2450
2451 /* Calculate the alternate setting number (from 1 to 16)
2452 according to the 'packet_size' module parameter */
2453 if (packet_size[dev_nr] < W9968CF_MIN_PACKET_SIZE)
2454 packet_size[dev_nr] = W9968CF_MIN_PACKET_SIZE;
2455 for (cam->altsetting = 1;
2456 packet_size[dev_nr] < wMaxPacketSize[cam->altsetting-1];
2457 cam->altsetting++);
2458
2459 cam->max_buffers = (max_buffers[dev_nr] < 2 ||
2460 max_buffers[dev_nr] > W9968CF_MAX_BUFFERS)
2461 ? W9968CF_BUFFERS : (u8)max_buffers[dev_nr];
2462
2463 cam->double_buffer = (double_buffer[dev_nr] == 0 ||
2464 double_buffer[dev_nr] == 1)
2465 ? (u8)double_buffer[dev_nr]:W9968CF_DOUBLE_BUFFER;
2466
2467 cam->clamping = (clamping[dev_nr] == 0 || clamping[dev_nr] == 1)
2468 ? (u8)clamping[dev_nr] : W9968CF_CLAMPING;
2469
2470 cam->filter_type = (filter_type[dev_nr] == 0 ||
2471 filter_type[dev_nr] == 1 ||
2472 filter_type[dev_nr] == 2)
2473 ? (u8)filter_type[dev_nr] : W9968CF_FILTER_TYPE;
2474
2475 cam->capture = 1;
2476
2477 cam->largeview = (largeview[dev_nr] == 0 || largeview[dev_nr] == 1)
2478 ? (u8)largeview[dev_nr] : W9968CF_LARGEVIEW;
2479
2480 cam->decompression = (decompression[dev_nr] == 0 ||
2481 decompression[dev_nr] == 1 ||
2482 decompression[dev_nr] == 2)
2483 ? (u8)decompression[dev_nr]:W9968CF_DECOMPRESSION;
2484
2485 cam->upscaling = (upscaling[dev_nr] == 0 ||
2486 upscaling[dev_nr] == 1)
2487 ? (u8)upscaling[dev_nr] : W9968CF_UPSCALING;
2488
2489 cam->auto_brt = (autobright[dev_nr] == 0 || autobright[dev_nr] == 1)
2490 ? (u8)autobright[dev_nr] : W9968CF_AUTOBRIGHT;
2491
2492 cam->auto_exp = (autoexp[dev_nr] == 0 || autoexp[dev_nr] == 1)
2493 ? (u8)autoexp[dev_nr] : W9968CF_AUTOEXP;
2494
2495 cam->lightfreq = (lightfreq[dev_nr] == 50 || lightfreq[dev_nr] == 60)
2496 ? (u8)lightfreq[dev_nr] : W9968CF_LIGHTFREQ;
2497
2498 cam->bandfilt = (bandingfilter[dev_nr] == 0 ||
2499 bandingfilter[dev_nr] == 1)
2500 ? (u8)bandingfilter[dev_nr] : W9968CF_BANDINGFILTER;
2501
2502 cam->backlight = (backlight[dev_nr] == 0 || backlight[dev_nr] == 1)
2503 ? (u8)backlight[dev_nr] : W9968CF_BACKLIGHT;
2504
2505 cam->clockdiv = (clockdiv[dev_nr] == -1 || clockdiv[dev_nr] >= 0)
2506 ? (s8)clockdiv[dev_nr] : W9968CF_CLOCKDIV;
2507
2508 cam->mirror = (mirror[dev_nr] == 0 || mirror[dev_nr] == 1)
2509 ? (u8)mirror[dev_nr] : W9968CF_MIRROR;
2510
2511 cam->monochrome = (monochrome[dev_nr] == 0 || monochrome[dev_nr] == 1)
2512 ? monochrome[dev_nr] : W9968CF_MONOCHROME;
2513
2514 cam->picture.brightness = (u16)brightness[dev_nr];
2515 cam->picture.hue = (u16)hue[dev_nr];
2516 cam->picture.colour = (u16)colour[dev_nr];
2517 cam->picture.contrast = (u16)contrast[dev_nr];
2518 cam->picture.whiteness = (u16)whiteness[dev_nr];
2519 if (w9968cf_valid_palette((u16)force_palette[dev_nr])) {
2520 cam->picture.palette = (u16)force_palette[dev_nr];
2521 cam->force_palette = 1;
2522 } else {
2523 cam->force_palette = 0;
2524 if (cam->decompression == 0)
2525 cam->picture.palette = W9968CF_PALETTE_DECOMP_OFF;
2526 else if (cam->decompression == 1)
2527 cam->picture.palette = W9968CF_PALETTE_DECOMP_FORCE;
2528 else
2529 cam->picture.palette = W9968CF_PALETTE_DECOMP_ON;
2530 }
2531 cam->picture.depth = w9968cf_valid_depth(cam->picture.palette);
2532
2533 cam->force_rgb = (force_rgb[dev_nr] == 0 || force_rgb[dev_nr] == 1)
2534 ? (u8)force_rgb[dev_nr] : W9968CF_FORCE_RGB;
2535
2536 cam->window.x = 0;
2537 cam->window.y = 0;
2538 cam->window.width = W9968CF_WIDTH;
2539 cam->window.height = W9968CF_HEIGHT;
2540 cam->window.chromakey = 0;
2541 cam->window.clipcount = 0;
2542 cam->window.flags = 0;
2543
2544 DBG(3, "%s configured with settings #%u:",
2545 symbolic(camlist, cam->id), dev_nr)
2546
2547 DBG(3, "- Data packet size for USB isochrnous transfer: %u bytes",
2548 wMaxPacketSize[cam->altsetting-1])
2549
2550 DBG(3, "- Number of requested video frame buffers: %u",
2551 cam->max_buffers)
2552
2553 if (cam->double_buffer)
2554 DBG(3, "- Hardware double buffering enabled")
2555 else
2556 DBG(3, "- Hardware double buffering disabled")
2557
2558 if (cam->filter_type == 0)
2559 DBG(3, "- Video filtering disabled")
2560 else if (cam->filter_type == 1)
2561 DBG(3, "- Video filtering enabled: type 1-2-1")
2562 else if (cam->filter_type == 2)
2563 DBG(3, "- Video filtering enabled: type 2-3-6-3-2")
2564
2565 if (cam->clamping)
2566 DBG(3, "- Video data clamping (CCIR-601 format) enabled")
2567 else
2568 DBG(3, "- Video data clamping (CCIR-601 format) disabled")
2569
2570 if (cam->largeview)
2571 DBG(3, "- Large view enabled")
2572 else
2573 DBG(3, "- Large view disabled")
2574
2575 if ((cam->decompression) == 0 && (!cam->force_palette))
2576 DBG(3, "- Decompression disabled")
2577 else if ((cam->decompression) == 1 && (!cam->force_palette))
2578 DBG(3, "- Decompression forced")
2579 else if ((cam->decompression) == 2 && (!cam->force_palette))
2580 DBG(3, "- Decompression allowed")
2581
2582 if (cam->upscaling)
2583 DBG(3, "- Software image scaling enabled")
2584 else
2585 DBG(3, "- Software image scaling disabled")
2586
2587 if (cam->force_palette)
2588 DBG(3, "- Image palette forced to %s",
2589 symbolic(v4l1_plist, cam->picture.palette))
2590
2591 if (cam->force_rgb)
2592 DBG(3, "- RGB component ordering will be used instead of BGR")
2593
2594 if (cam->auto_brt)
2595 DBG(3, "- Auto brightness enabled")
2596 else
2597 DBG(3, "- Auto brightness disabled")
2598
2599 if (cam->auto_exp)
2600 DBG(3, "- Auto exposure enabled")
2601 else
2602 DBG(3, "- Auto exposure disabled")
2603
2604 if (cam->backlight)
2605 DBG(3, "- Backlight exposure algorithm enabled")
2606 else
2607 DBG(3, "- Backlight exposure algorithm disabled")
2608
2609 if (cam->mirror)
2610 DBG(3, "- Mirror enabled")
2611 else
2612 DBG(3, "- Mirror disabled")
2613
2614 if (cam->bandfilt)
2615 DBG(3, "- Banding filter enabled")
2616 else
2617 DBG(3, "- Banding filter disabled")
2618
2619 DBG(3, "- Power lighting frequency: %u", cam->lightfreq)
2620
2621 if (cam->clockdiv == -1)
2622 DBG(3, "- Automatic clock divisor enabled")
2623 else
2624 DBG(3, "- Clock divisor: %d", cam->clockdiv)
2625
2626 if (cam->monochrome)
2627 DBG(3, "- Image sensor used as monochrome")
2628 else
2629 DBG(3, "- Image sensor not used as monochrome")
2630 }
2631
2632
2633 /*--------------------------------------------------------------------------
2634 If the video post-processing module is not loaded, some parameters
2635 must be overridden.
2636 --------------------------------------------------------------------------*/
2637 static void w9968cf_adjust_configuration(struct w9968cf_device* cam)
2638 {
2639 if (!w9968cf_vpp) {
2640 if (cam->decompression == 1) {
2641 cam->decompression = 2;
2642 DBG(2, "Video post-processing module not found: "
2643 "'decompression' parameter forced to 2")
2644 }
2645 if (cam->upscaling) {
2646 cam->upscaling = 0;
2647 DBG(2, "Video post-processing module not found: "
2648 "'upscaling' parameter forced to 0")
2649 }
2650 if (cam->picture.palette != VIDEO_PALETTE_UYVY) {
2651 cam->force_palette = 0;
2652 DBG(2, "Video post-processing module not found: "
2653 "'force_palette' parameter forced to 0")
2654 }
2655 cam->picture.palette = VIDEO_PALETTE_UYVY;
2656 cam->picture.depth = w9968cf_valid_depth(cam->picture.palette);
2657 }
2658 }
2659
2660
2661 /*--------------------------------------------------------------------------
2662 Release the resources used by the driver.
2663 This function is called on disconnect
2664 (or on close if deallocation has been deferred)
2665 --------------------------------------------------------------------------*/
2666 static void w9968cf_release_resources(struct w9968cf_device* cam)
2667 {
2668 down(&w9968cf_devlist_sem);
2669
2670 DBG(2, "V4L device deregistered: /dev/video%d", cam->v4ldev->minor)
2671
2672 video_unregister_device(cam->v4ldev);
2673 list_del(&cam->v4llist);
2674 i2c_del_adapter(&cam->i2c_adapter);
2675 w9968cf_deallocate_memory(cam);
2676 kfree(cam->control_buffer);
2677 kfree(cam->data_buffer);
2678
2679 up(&w9968cf_devlist_sem);
2680 }
2681
2682
2683
2684 /****************************************************************************
2685 * Video4Linux interface *
2686 ****************************************************************************/
2687
2688 static int w9968cf_open(struct inode* inode, struct file* filp)
2689 {
2690 struct w9968cf_device* cam;
2691 int err;
2692
2693 /* This the only safe way to prevent race conditions with disconnect */
2694 if (!down_read_trylock(&w9968cf_disconnect))
2695 return -ERESTARTSYS;
2696
2697 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2698
2699 down(&cam->dev_sem);
2700
2701 if (cam->sensor == CC_UNKNOWN) {
2702 DBG(2, "No supported image sensor has been detected by the "
2703 "'ovcamchip' module for the %s (/dev/video%d). Make "
2704 "sure it is loaded *before* (re)connecting the camera.",
2705 symbolic(camlist, cam->id), cam->v4ldev->minor)
2706 up(&cam->dev_sem);
2707 up_read(&w9968cf_disconnect);
2708 return -ENODEV;
2709 }
2710
2711 if (cam->users) {
2712 DBG(2, "%s (/dev/video%d) has been already occupied by '%s'",
2713 symbolic(camlist, cam->id),cam->v4ldev->minor,cam->command)
2714 if ((filp->f_flags & O_NONBLOCK)||(filp->f_flags & O_NDELAY)) {
2715 up(&cam->dev_sem);
2716 up_read(&w9968cf_disconnect);
2717 return -EWOULDBLOCK;
2718 }
2719 up(&cam->dev_sem);
2720 err = wait_event_interruptible_exclusive(cam->open,
2721 cam->disconnected ||
2722 !cam->users);
2723 if (err) {
2724 up_read(&w9968cf_disconnect);
2725 return err;
2726 }
2727 if (cam->disconnected) {
2728 up_read(&w9968cf_disconnect);
2729 return -ENODEV;
2730 }
2731 down(&cam->dev_sem);
2732 }
2733
2734 DBG(5, "Opening '%s', /dev/video%d ...",
2735 symbolic(camlist, cam->id), cam->v4ldev->minor)
2736
2737 cam->streaming = 0;
2738 cam->misconfigured = 0;
2739
2740 if (!w9968cf_vpp)
2741 if ((err = w9968cf_vppmod_detect(cam)))
2742 goto out;
2743
2744 if ((err = w9968cf_allocate_memory(cam)))
2745 goto deallocate_memory;
2746
2747 if ((err = w9968cf_init_chip(cam)))
2748 goto deallocate_memory;
2749
2750 if ((err = w9968cf_start_transfer(cam)))
2751 goto deallocate_memory;
2752
2753 filp->private_data = cam;
2754
2755 cam->users++;
2756 strcpy(cam->command, current->comm);
2757
2758 init_waitqueue_head(&cam->wait_queue);
2759
2760 DBG(5, "Video device is open")
2761
2762 up(&cam->dev_sem);
2763 up_read(&w9968cf_disconnect);
2764
2765 return 0;
2766
2767 deallocate_memory:
2768 w9968cf_deallocate_memory(cam);
2769 out:
2770 DBG(2, "Failed to open the video device")
2771 up(&cam->dev_sem);
2772 up_read(&w9968cf_disconnect);
2773 return err;
2774 }
2775
2776
2777 static int w9968cf_release(struct inode* inode, struct file* filp)
2778 {
2779 struct w9968cf_device* cam;
2780
2781 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2782
2783 down(&cam->dev_sem); /* prevent disconnect() to be called */
2784
2785 w9968cf_stop_transfer(cam);
2786
2787 w9968cf_vppmod_release(cam);
2788
2789 if (cam->disconnected) {
2790 w9968cf_release_resources(cam);
2791 up(&cam->dev_sem);
2792 kfree(cam);
2793 return 0;
2794 }
2795
2796 cam->users--;
2797 w9968cf_deallocate_memory(cam);
2798 wake_up_interruptible_nr(&cam->open, 1);
2799
2800 DBG(5, "Video device closed")
2801 up(&cam->dev_sem);
2802 return 0;
2803 }
2804
2805
2806 static ssize_t
2807 w9968cf_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
2808 {
2809 struct w9968cf_device* cam;
2810 struct w9968cf_frame_t* fr;
2811 int err = 0;
2812
2813 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2814
2815 if (filp->f_flags & O_NONBLOCK)
2816 return -EWOULDBLOCK;
2817
2818 if (down_interruptible(&cam->fileop_sem))
2819 return -ERESTARTSYS;
2820
2821 if (cam->disconnected) {
2822 DBG(2, "Device not present")
2823 up(&cam->fileop_sem);
2824 return -ENODEV;
2825 }
2826
2827 if (cam->misconfigured) {
2828 DBG(2, "The camera is misconfigured. Close and open it again.")
2829 up(&cam->fileop_sem);
2830 return -EIO;
2831 }
2832
2833 if (!cam->frame[0].queued)
2834 w9968cf_push_frame(cam, 0);
2835
2836 if (!cam->frame[1].queued)
2837 w9968cf_push_frame(cam, 1);
2838
2839 err = wait_event_interruptible(cam->wait_queue,
2840 cam->frame[0].status == F_READY ||
2841 cam->frame[1].status == F_READY ||
2842 cam->disconnected);
2843 if (err) {
2844 up(&cam->fileop_sem);
2845 return err;
2846 }
2847 if (cam->disconnected) {
2848 up(&cam->fileop_sem);
2849 return -ENODEV;
2850 }
2851
2852 fr = (cam->frame[0].status == F_READY) ? &cam->frame[0]:&cam->frame[1];
2853
2854 if (w9968cf_vpp)
2855 w9968cf_postprocess_frame(cam, fr);
2856
2857 if (count > fr->length)
2858 count = fr->length;
2859
2860 if (copy_to_user(buf, fr->buffer, count)) {
2861 fr->status = F_UNUSED;
2862 up(&cam->fileop_sem);
2863 return -EFAULT;
2864 }
2865 *f_pos += count;
2866
2867 fr->status = F_UNUSED;
2868
2869 DBG(5, "%zu bytes read", count)
2870
2871 up(&cam->fileop_sem);
2872 return count;
2873 }
2874
2875
2876 static int w9968cf_mmap(struct file* filp, struct vm_area_struct *vma)
2877 {
2878 struct w9968cf_device* cam = (struct w9968cf_device*)
2879 video_get_drvdata(video_devdata(filp));
2880 unsigned long vsize = vma->vm_end - vma->vm_start,
2881 psize = cam->nbuffers * cam->frame[0].size,
2882 start = vma->vm_start,
2883 pos = (unsigned long)cam->frame[0].buffer,
2884 page;
2885
2886 if (cam->disconnected) {
2887 DBG(2, "Device not present")
2888 return -ENODEV;
2889 }
2890
2891 if (cam->misconfigured) {
2892 DBG(2, "The camera is misconfigured. Close and open it again")
2893 return -EIO;
2894 }
2895
2896 PDBGG("mmapping %lu bytes...", vsize)
2897
2898 if (vsize > psize - (vma->vm_pgoff << PAGE_SHIFT))
2899 return -EINVAL;
2900
2901 while (vsize > 0) {
2902 page = vmalloc_to_pfn((void *)pos);
2903 if (remap_pfn_range(vma, start, page + vma->vm_pgoff,
2904 PAGE_SIZE, vma->vm_page_prot))
2905 return -EAGAIN;
2906 start += PAGE_SIZE;
2907 pos += PAGE_SIZE;
2908 vsize -= PAGE_SIZE;
2909 }
2910
2911 DBG(5, "mmap method successfully called")
2912 return 0;
2913 }
2914
2915
2916 static int
2917 w9968cf_ioctl(struct inode* inode, struct file* filp,
2918 unsigned int cmd, unsigned long arg)
2919 {
2920 struct w9968cf_device* cam;
2921 int err;
2922
2923 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2924
2925 if (down_interruptible(&cam->fileop_sem))
2926 return -ERESTARTSYS;
2927
2928 if (cam->disconnected) {
2929 DBG(2, "Device not present")
2930 up(&cam->fileop_sem);
2931 return -ENODEV;
2932 }
2933
2934 if (cam->misconfigured) {
2935 DBG(2, "The camera is misconfigured. Close and open it again.")
2936 up(&cam->fileop_sem);
2937 return -EIO;
2938 }
2939
2940 err = w9968cf_v4l_ioctl(inode, filp, cmd, (void __user *)arg);
2941
2942 up(&cam->fileop_sem);
2943 return err;
2944 }
2945
2946
2947 static int w9968cf_v4l_ioctl(struct inode* inode, struct file* filp,
2948 unsigned int cmd, void __user * arg)
2949 {
2950 struct w9968cf_device* cam;
2951 const char* v4l1_ioctls[] = {
2952 "?", "CGAP", "GCHAN", "SCHAN", "GTUNER", "STUNER",
2953 "GPICT", "SPICT", "CCAPTURE", "GWIN", "SWIN", "GFBUF",
2954 "SFBUF", "KEY", "GFREQ", "SFREQ", "GAUDIO", "SAUDIO",
2955 "SYNC", "MCAPTURE", "GMBUF", "GUNIT", "GCAPTURE", "SCAPTURE",
2956 "SPLAYMODE", "SWRITEMODE", "GPLAYINFO", "SMICROCODE",
2957 "GVBIFMT", "SVBIFMT"
2958 };
2959
2960 #define V4L1_IOCTL(cmd) \
2961 ((_IOC_NR((cmd)) < ARRAY_SIZE(v4l1_ioctls)) ? \
2962 v4l1_ioctls[_IOC_NR((cmd))] : "?")
2963
2964 cam = (struct w9968cf_device*)video_get_drvdata(video_devdata(filp));
2965
2966 switch (cmd) {
2967
2968 case VIDIOCGCAP: /* get video capability */
2969 {
2970 struct video_capability cap = {
2971 .type = VID_TYPE_CAPTURE | VID_TYPE_SCALES,
2972 .channels = 1,
2973 .audios = 0,
2974 .minwidth = cam->minwidth,
2975 .minheight = cam->minheight,
2976 };
2977 sprintf(cap.name, "W996[87]CF USB Camera #%d",
2978 cam->v4ldev->minor);
2979 cap.maxwidth = (cam->upscaling && w9968cf_vpp)
2980 ? max((u16)W9968CF_MAX_WIDTH, cam->maxwidth)
2981 : cam->maxwidth;
2982 cap.maxheight = (cam->upscaling && w9968cf_vpp)
2983 ? max((u16)W9968CF_MAX_HEIGHT, cam->maxheight)
2984 : cam->maxheight;
2985
2986 if (copy_to_user(arg, &cap, sizeof(cap)))
2987 return -EFAULT;
2988
2989 DBG(5, "VIDIOCGCAP successfully called")
2990 return 0;
2991 }
2992
2993 case VIDIOCGCHAN: /* get video channel informations */
2994 {
2995 struct video_channel chan;
2996 if (copy_from_user(&chan, arg, sizeof(chan)))
2997 return -EFAULT;
2998
2999 if (chan.channel != 0)
3000 return -EINVAL;
3001
3002 strcpy(chan.name, "Camera");
3003 chan.tuners = 0;
3004 chan.flags = 0;
3005 chan.type = VIDEO_TYPE_CAMERA;
3006 chan.norm = VIDEO_MODE_AUTO;
3007
3008 if (copy_to_user(arg, &chan, sizeof(chan)))
3009 return -EFAULT;
3010
3011 DBG(5, "VIDIOCGCHAN successfully called")
3012 return 0;
3013 }
3014
3015 case VIDIOCSCHAN: /* set active channel */
3016 {
3017 struct video_channel chan;
3018
3019 if (copy_from_user(&chan, arg, sizeof(chan)))
3020 return -EFAULT;
3021
3022 if (chan.channel != 0)
3023 return -EINVAL;
3024
3025 DBG(5, "VIDIOCSCHAN successfully called")
3026 return 0;
3027 }
3028
3029 case VIDIOCGPICT: /* get image properties of the picture */
3030 {
3031 if (w9968cf_sensor_get_picture(cam))
3032 return -EIO;
3033
3034 if (copy_to_user(arg, &cam->picture, sizeof(cam->picture)))
3035 return -EFAULT;
3036
3037 DBG(5, "VIDIOCGPICT successfully called")
3038 return 0;
3039 }
3040
3041 case VIDIOCSPICT: /* change picture settings */
3042 {
3043 struct video_picture pict;
3044 int err = 0;
3045
3046 if (copy_from_user(&pict, arg, sizeof(pict)))
3047 return -EFAULT;
3048
3049 if ( (cam->force_palette || !w9968cf_vpp)
3050 && pict.palette != cam->picture.palette ) {
3051 DBG(4, "Palette %s rejected: only %s is allowed",
3052 symbolic(v4l1_plist, pict.palette),
3053 symbolic(v4l1_plist, cam->picture.palette))
3054 return -EINVAL;
3055 }
3056
3057 if (!w9968cf_valid_palette(pict.palette)) {
3058 DBG(4, "Palette %s not supported. VIDIOCSPICT failed",
3059 symbolic(v4l1_plist, pict.palette))
3060 return -EINVAL;
3061 }
3062
3063 if (!cam->force_palette) {
3064 if (cam->decompression == 0) {
3065 if (w9968cf_need_decompression(pict.palette)) {
3066 DBG(4, "Decompression disabled: palette %s is not "
3067 "allowed. VIDIOCSPICT failed",
3068 symbolic(v4l1_plist, pict.palette))
3069 return -EINVAL;
3070 }
3071 } else if (cam->decompression == 1) {
3072 if (!w9968cf_need_decompression(pict.palette)) {
3073 DBG(4, "Decompression forced: palette %s is not "
3074 "allowed. VIDIOCSPICT failed",
3075 symbolic(v4l1_plist, pict.palette))
3076 return -EINVAL;
3077 }
3078 }
3079 }
3080
3081 if (pict.depth != w9968cf_valid_depth(pict.palette)) {
3082 DBG(4, "Requested depth %u bpp is not valid for %s "
3083 "palette: ignored and changed to %u bpp",
3084 pict.depth, symbolic(v4l1_plist, pict.palette),
3085 w9968cf_valid_depth(pict.palette))
3086 pict.depth = w9968cf_valid_depth(pict.palette);
3087 }
3088
3089 if (pict.palette != cam->picture.palette) {
3090 if(*cam->requested_frame
3091 || cam->frame_current->queued) {
3092 err = wait_event_interruptible
3093 ( cam->wait_queue,
3094 cam->disconnected ||
3095 (!*cam->requested_frame &&
3096 !cam->frame_current->queued) );
3097 if (err)
3098 return err;
3099 if (cam->disconnected)
3100 return -ENODEV;
3101 }
3102
3103 if (w9968cf_stop_transfer(cam))
3104 goto ioctl_fail;
3105
3106 if (w9968cf_set_picture(cam, pict))
3107 goto ioctl_fail;
3108
3109 if (w9968cf_start_transfer(cam))
3110 goto ioctl_fail;
3111
3112 } else if (w9968cf_sensor_update_picture(cam, pict))
3113 return -EIO;
3114
3115
3116 DBG(5, "VIDIOCSPICT successfully called")
3117 return 0;
3118 }
3119
3120 case VIDIOCSWIN: /* set capture area */
3121 {
3122 struct video_window win;
3123 int err = 0;
3124
3125 if (copy_from_user(&win, arg, sizeof(win)))
3126 return -EFAULT;
3127
3128 DBG(6, "VIDIOCSWIN called: clipcount=%d, flags=%u, "
3129 "x=%u, y=%u, %ux%u", win.clipcount, win.flags,
3130 win.x, win.y, win.width, win.height)
3131
3132 if (win.clipcount != 0 || win.flags != 0)
3133 return -EINVAL;
3134
3135 if ((err = w9968cf_adjust_window_size(cam, (u16*)&win.width,
3136 (u16*)&win.height))) {
3137 DBG(4, "Resolution not supported (%ux%u). "
3138 "VIDIOCSWIN failed", win.width, win.height)
3139 return err;
3140 }
3141
3142 if (win.x != cam->window.x ||
3143 win.y != cam->window.y ||
3144 win.width != cam->window.width ||
3145 win.height != cam->window.height) {
3146 if(*cam->requested_frame
3147 || cam->frame_current->queued) {
3148 err = wait_event_interruptible
3149 ( cam->wait_queue,
3150 cam->disconnected ||
3151 (!*cam->requested_frame &&
3152 !cam->frame_current->queued) );
3153 if (err)
3154 return err;
3155 if (cam->disconnected)
3156 return -ENODEV;
3157 }
3158
3159 if (w9968cf_stop_transfer(cam))
3160 goto ioctl_fail;
3161
3162 /* This _must_ be called before set_window() */
3163 if (w9968cf_set_picture(cam, cam->picture))
3164 goto ioctl_fail;
3165
3166 if (w9968cf_set_window(cam, win))
3167 goto ioctl_fail;
3168
3169 if (w9968cf_start_transfer(cam))
3170 goto ioctl_fail;
3171 }
3172
3173 DBG(5, "VIDIOCSWIN successfully called. ")
3174 return 0;
3175 }
3176
3177 case VIDIOCGWIN: /* get current window properties */
3178 {
3179 if (copy_to_user(arg,&cam->window,sizeof(struct video_window)))
3180 return -EFAULT;
3181
3182 DBG(5, "VIDIOCGWIN successfully called")
3183 return 0;
3184 }
3185
3186 case VIDIOCGMBUF: /* request for memory (mapped) buffer */
3187 {
3188 struct video_mbuf mbuf;
3189 u8 i;
3190
3191 mbuf.size = cam->nbuffers * cam->frame[0].size;
3192 mbuf.frames = cam->nbuffers;
3193 for (i = 0; i < cam->nbuffers; i++)
3194 mbuf.offsets[i] = (unsigned long)cam->frame[i].buffer -
3195 (unsigned long)cam->frame[0].buffer;
3196
3197 if (copy_to_user(arg, &mbuf, sizeof(mbuf)))
3198 return -EFAULT;
3199
3200 DBG(5, "VIDIOCGMBUF successfully called")
3201 return 0;
3202 }
3203
3204 case VIDIOCMCAPTURE: /* start the capture to a frame */
3205 {
3206 struct video_mmap mmap;
3207 struct w9968cf_frame_t* fr;
3208 int err = 0;
3209
3210 if (copy_from_user(&mmap, arg, sizeof(mmap)))
3211 return -EFAULT;
3212
3213 DBG(6, "VIDIOCMCAPTURE called: frame #%u, format=%s, %dx%d",
3214 mmap.frame, symbolic(v4l1_plist, mmap.format),
3215 mmap.width, mmap.height)
3216
3217 if (mmap.frame >= cam->nbuffers) {
3218 DBG(4, "Invalid frame number (%u). "
3219 "VIDIOCMCAPTURE failed", mmap.frame)
3220 return -EINVAL;
3221 }
3222
3223 if (mmap.format!=cam->picture.palette &&
3224 (cam->force_palette || !w9968cf_vpp)) {
3225 DBG(4, "Palette %s rejected: only %s is allowed",
3226 symbolic(v4l1_plist, mmap.format),
3227 symbolic(v4l1_plist, cam->picture.palette))
3228 return -EINVAL;
3229 }
3230
3231 if (!w9968cf_valid_palette(mmap.format)) {
3232 DBG(4, "Palette %s not supported. "
3233 "VIDIOCMCAPTURE failed",
3234 symbolic(v4l1_plist, mmap.format))
3235 return -EINVAL;
3236 }
3237
3238 if (!cam->force_palette) {
3239 if (cam->decompression == 0) {
3240 if (w9968cf_need_decompression(mmap.format)) {
3241 DBG(4, "Decompression disabled: palette %s is not "
3242 "allowed. VIDIOCSPICT failed",
3243 symbolic(v4l1_plist, mmap.format))
3244 return -EINVAL;
3245 }
3246 } else if (cam->decompression == 1) {
3247 if (!w9968cf_need_decompression(mmap.format)) {
3248 DBG(4, "Decompression forced: palette %s is not "
3249 "allowed. VIDIOCSPICT failed",
3250 symbolic(v4l1_plist, mmap.format))
3251 return -EINVAL;
3252 }
3253 }
3254 }
3255
3256 if ((err = w9968cf_adjust_window_size(cam, (u16*)&mmap.width,
3257 (u16*)&mmap.height))) {
3258 DBG(4, "Resolution not supported (%dx%d). "
3259 "VIDIOCMCAPTURE failed",
3260 mmap.width, mmap.height)
3261 return err;
3262 }
3263
3264 fr = &cam->frame[mmap.frame];
3265
3266 if (mmap.width != cam->window.width ||
3267 mmap.height != cam->window.height ||
3268 mmap.format != cam->picture.palette) {
3269
3270 struct video_window win;
3271 struct video_picture pict;
3272
3273 if(*cam->requested_frame
3274 || cam->frame_current->queued) {
3275 DBG(6, "VIDIOCMCAPTURE. Change settings for "
3276 "frame #%u: %dx%d, format %s. Wait...",
3277 mmap.frame, mmap.width, mmap.height,
3278 symbolic(v4l1_plist, mmap.format))
3279 err = wait_event_interruptible
3280 ( cam->wait_queue,
3281 cam->disconnected ||
3282 (!*cam->requested_frame &&
3283 !cam->frame_current->queued) );
3284 if (err)
3285 return err;
3286 if (cam->disconnected)
3287 return -ENODEV;
3288 }
3289
3290 memcpy(&win, &cam->window, sizeof(win));
3291 memcpy(&pict, &cam->picture, sizeof(pict));
3292 win.width = mmap.width;
3293 win.height = mmap.height;
3294 pict.palette = mmap.format;
3295
3296 if (w9968cf_stop_transfer(cam))
3297 goto ioctl_fail;
3298
3299 /* This before set_window */
3300 if (w9968cf_set_picture(cam, pict))
3301 goto ioctl_fail;
3302
3303 if (w9968cf_set_window(cam, win))
3304 goto ioctl_fail;
3305
3306 if (w9968cf_start_transfer(cam))
3307 goto ioctl_fail;
3308
3309 } else if (fr->queued) {
3310
3311 DBG(6, "Wait until frame #%u is free", mmap.frame)
3312
3313 err = wait_event_interruptible(cam->wait_queue,
3314 cam->disconnected ||
3315 (!fr->queued));
3316 if (err)
3317 return err;
3318 if (cam->disconnected)
3319 return -ENODEV;
3320 }
3321
3322 w9968cf_push_frame(cam, mmap.frame);
3323 DBG(5, "VIDIOCMCAPTURE(%u): successfully called", mmap.frame)
3324 return 0;
3325 }
3326
3327 case VIDIOCSYNC: /* wait until the capture of a frame is finished */
3328 {
3329 unsigned int f_num;
3330 struct w9968cf_frame_t* fr;
3331 int err = 0;
3332
3333 if (copy_from_user(&f_num, arg, sizeof(f_num)))
3334 return -EFAULT;
3335
3336 if (f_num >= cam->nbuffers) {
3337 DBG(4, "Invalid frame number (%u). "
3338 "VIDIOCMCAPTURE failed", f_num)
3339 return -EINVAL;
3340 }
3341
3342 DBG(6, "VIDIOCSYNC called for frame #%u", f_num)
3343
3344 fr = &cam->frame[f_num];
3345
3346 switch (fr->status) {
3347 case F_UNUSED:
3348 if (!fr->queued) {
3349 DBG(4, "VIDIOSYNC: Frame #%u not requested!",
3350 f_num)
3351 return -EFAULT;
3352 }
3353 case F_ERROR:
3354 case F_GRABBING:
3355 err = wait_event_interruptible(cam->wait_queue,
3356 (fr->status == F_READY)
3357 || cam->disconnected);
3358 if (err)
3359 return err;
3360 if (cam->disconnected)
3361 return -ENODEV;
3362 break;
3363 case F_READY:
3364 break;
3365 }
3366
3367 if (w9968cf_vpp)
3368 w9968cf_postprocess_frame(cam, fr);
3369
3370 fr->status = F_UNUSED;
3371
3372 DBG(5, "VIDIOCSYNC(%u) successfully called", f_num)
3373 return 0;
3374 }
3375
3376 case VIDIOCGUNIT:/* report the unit numbers of the associated devices*/
3377 {
3378 struct video_unit unit = {
3379 .video = cam->v4ldev->minor,
3380 .vbi = VIDEO_NO_UNIT,
3381 .radio = VIDEO_NO_UNIT,
3382 .audio = VIDEO_NO_UNIT,
3383 .teletext = VIDEO_NO_UNIT,
3384 };
3385
3386 if (copy_to_user(arg, &unit, sizeof(unit)))
3387 return -EFAULT;
3388
3389 DBG(5, "VIDIOCGUNIT successfully called")
3390 return 0;
3391 }
3392
3393 case VIDIOCKEY:
3394 return 0;
3395
3396 case VIDIOCGFBUF:
3397 {
3398 if (clear_user(arg, sizeof(struct video_buffer)))
3399 return -EFAULT;
3400
3401 DBG(5, "VIDIOCGFBUF successfully called")
3402 return 0;
3403 }
3404
3405 case VIDIOCGTUNER:
3406 {
3407 struct video_tuner tuner;
3408 if (copy_from_user(&tuner, arg, sizeof(tuner)))
3409 return -EFAULT;
3410
3411 if (tuner.tuner != 0)
3412 return -EINVAL;
3413
3414 strcpy(tuner.name, "no_tuner");
3415 tuner.rangelow = 0;
3416 tuner.rangehigh = 0;
3417 tuner.flags = VIDEO_TUNER_NORM;
3418 tuner.mode = VIDEO_MODE_AUTO;
3419 tuner.signal = 0xffff;
3420
3421 if (copy_to_user(arg, &tuner, sizeof(tuner)))
3422 return -EFAULT;
3423
3424 DBG(5, "VIDIOCGTUNER successfully called")
3425 return 0;
3426 }
3427
3428 case VIDIOCSTUNER:
3429 {
3430 struct video_tuner tuner;
3431 if (copy_from_user(&tuner, arg, sizeof(tuner)))
3432 return -EFAULT;
3433
3434 if (tuner.tuner != 0)
3435 return -EINVAL;
3436
3437 if (tuner.mode != VIDEO_MODE_AUTO)
3438 return -EINVAL;
3439
3440 DBG(5, "VIDIOCSTUNER successfully called")
3441 return 0;
3442 }
3443
3444 case VIDIOCSFBUF:
3445 case VIDIOCCAPTURE:
3446 case VIDIOCGFREQ:
3447 case VIDIOCSFREQ:
3448 case VIDIOCGAUDIO:
3449 case VIDIOCSAUDIO:
3450 case VIDIOCSPLAYMODE:
3451 case VIDIOCSWRITEMODE:
3452 case VIDIOCGPLAYINFO:
3453 case VIDIOCSMICROCODE:
3454 case VIDIOCGVBIFMT:
3455 case VIDIOCSVBIFMT:
3456 DBG(4, "Unsupported V4L1 IOCtl: VIDIOC%s "
3457 "(type 0x%01X, "
3458 "n. 0x%01X, "
3459 "dir. 0x%01X, "
3460 "size 0x%02X)",
3461 V4L1_IOCTL(cmd),
3462 _IOC_TYPE(cmd),_IOC_NR(cmd),_IOC_DIR(cmd),_IOC_SIZE(cmd))
3463
3464 return -EINVAL;
3465
3466 default:
3467 DBG(4, "Invalid V4L1 IOCtl: VIDIOC%s "
3468 "type 0x%01X, "
3469 "n. 0x%01X, "
3470 "dir. 0x%01X, "
3471 "size 0x%02X",
3472 V4L1_IOCTL(cmd),
3473 _IOC_TYPE(cmd),_IOC_NR(cmd),_IOC_DIR(cmd),_IOC_SIZE(cmd))
3474
3475 return -ENOIOCTLCMD;
3476
3477 } /* end of switch */
3478
3479 ioctl_fail:
3480 cam->misconfigured = 1;
3481 DBG(1, "VIDIOC%s failed because of hardware problems. "
3482 "To use the camera, close and open it again.", V4L1_IOCTL(cmd))
3483 return -EFAULT;
3484 }
3485
3486
3487 static struct file_operations w9968cf_fops = {
3488 .owner = THIS_MODULE,
3489 .open = w9968cf_open,
3490 .release = w9968cf_release,
3491 .read = w9968cf_read,
3492 .ioctl = w9968cf_ioctl,
3493 .mmap = w9968cf_mmap,
3494 .llseek = no_llseek,
3495 };
3496
3497
3498
3499 /****************************************************************************
3500 * USB probe and V4L registration, disconnect and id_table[] definition *
3501 ****************************************************************************/
3502
3503 static int
3504 w9968cf_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
3505 {
3506 struct usb_device *udev = interface_to_usbdev(intf);
3507 struct w9968cf_device* cam;
3508 int err = 0;
3509 enum w9968cf_model_id mod_id;
3510 struct list_head* ptr;
3511 u8 sc = 0; /* number of simultaneous cameras */
3512 static unsigned short dev_nr = 0; /* we are handling device number n */
3513
3514 if (le16_to_cpu(udev->descriptor.idVendor) == winbond_id_table[0].idVendor &&
3515 le16_to_cpu(udev->descriptor.idProduct) == winbond_id_table[0].idProduct)
3516 mod_id = W9968CF_MOD_CLVBWGP; /* see camlist[] table */
3517 else if (le16_to_cpu(udev->descriptor.idVendor) == winbond_id_table[1].idVendor &&
3518 le16_to_cpu(udev->descriptor.idProduct) == winbond_id_table[1].idProduct)
3519 mod_id = W9968CF_MOD_GENERIC; /* see camlist[] table */
3520 else
3521 return -ENODEV;
3522
3523 cam = (struct w9968cf_device*)
3524 kmalloc(sizeof(struct w9968cf_device), GFP_KERNEL);
3525 if (!cam)
3526 return -ENOMEM;
3527
3528 memset(cam, 0, sizeof(*cam));
3529
3530 init_MUTEX(&cam->dev_sem);
3531 down(&cam->dev_sem);
3532
3533 cam->usbdev = udev;
3534 /* NOTE: a local copy is used to avoid possible race conditions */
3535 memcpy(&cam->dev, &udev->dev, sizeof(struct device));
3536
3537 DBG(2, "%s detected", symbolic(camlist, mod_id))
3538
3539 if (simcams > W9968CF_MAX_DEVICES)
3540 simcams = W9968CF_SIMCAMS;
3541
3542 /* How many cameras are connected ? */
3543 down(&w9968cf_devlist_sem);
3544 list_for_each(ptr, &w9968cf_dev_list)
3545 sc++;
3546 up(&w9968cf_devlist_sem);
3547
3548 if (sc >= simcams) {
3549 DBG(2, "Device rejected: too many connected cameras "
3550 "(max. %u)", simcams)
3551 err = -EPERM;
3552 goto fail;
3553 }
3554
3555
3556 /* Allocate 2 bytes of memory for camera control USB transfers */
3557 if (!(cam->control_buffer = kmalloc(2, GFP_KERNEL))) {
3558 DBG(1,"Couldn't allocate memory for camera control transfers")
3559 err = -ENOMEM;
3560 goto fail;
3561 }
3562 memset(cam->control_buffer, 0, 2);
3563
3564 /* Allocate 8 bytes of memory for USB data transfers to the FSB */
3565 if (!(cam->data_buffer = kmalloc(8, GFP_KERNEL))) {
3566 DBG(1, "Couldn't allocate memory for data "
3567 "transfers to the FSB")
3568 err = -ENOMEM;
3569 goto fail;
3570 }
3571 memset(cam->data_buffer, 0, 8);
3572
3573 /* Register the V4L device */
3574 cam->v4ldev = video_device_alloc();
3575 if (!cam->v4ldev) {
3576 DBG(1, "Could not allocate memory for a V4L structure")
3577 err = -ENOMEM;
3578 goto fail;
3579 }
3580
3581 strcpy(cam->v4ldev->name, symbolic(camlist, mod_id));
3582 cam->v4ldev->owner = THIS_MODULE;
3583 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
3584 cam->v4ldev->hardware = VID_HARDWARE_W9968CF;
3585 cam->v4ldev->fops = &w9968cf_fops;
3586 cam->v4ldev->minor = video_nr[dev_nr];
3587 cam->v4ldev->release = video_device_release;
3588 video_set_drvdata(cam->v4ldev, cam);
3589 cam->v4ldev->dev = &cam->dev;
3590
3591 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
3592 video_nr[dev_nr]);
3593 if (err) {
3594 DBG(1, "V4L device registration failed")
3595 if (err == -ENFILE && video_nr[dev_nr] == -1)
3596 DBG(2, "Couldn't find a free /dev/videoX node")
3597 video_nr[dev_nr] = -1;
3598 dev_nr = (dev_nr < W9968CF_MAX_DEVICES-1) ? dev_nr+1 : 0;
3599 goto fail;
3600 }
3601
3602 DBG(2, "V4L device registered as /dev/video%d", cam->v4ldev->minor)
3603
3604 /* Set some basic constants */
3605 w9968cf_configure_camera(cam, udev, mod_id, dev_nr);
3606
3607 /* Add a new entry into the list of V4L registered devices */
3608 down(&w9968cf_devlist_sem);
3609 list_add(&cam->v4llist, &w9968cf_dev_list);
3610 up(&w9968cf_devlist_sem);
3611 dev_nr = (dev_nr < W9968CF_MAX_DEVICES-1) ? dev_nr+1 : 0;
3612
3613 w9968cf_turn_on_led(cam);
3614
3615 w9968cf_i2c_init(cam);
3616
3617 usb_set_intfdata(intf, cam);
3618 up(&cam->dev_sem);
3619 return 0;
3620
3621 fail: /* Free unused memory */
3622 kfree(cam->control_buffer);
3623 kfree(cam->data_buffer);
3624 if (cam->v4ldev)
3625 video_device_release(cam->v4ldev);
3626 up(&cam->dev_sem);
3627 kfree(cam);
3628 return err;
3629 }
3630
3631
3632 static void w9968cf_usb_disconnect(struct usb_interface* intf)
3633 {
3634 struct w9968cf_device* cam =
3635 (struct w9968cf_device*)usb_get_intfdata(intf);
3636
3637 down_write(&w9968cf_disconnect);
3638
3639 if (cam) {
3640 /* Prevent concurrent accesses to data */
3641 down(&cam->dev_sem);
3642
3643 cam->disconnected = 1;
3644
3645 DBG(2, "Disconnecting %s...", symbolic(camlist, cam->id))
3646
3647 wake_up_interruptible_all(&cam->open);
3648
3649 if (cam->users) {
3650 DBG(2, "The device is open (/dev/video%d)! "
3651 "Process name: %s. Deregistration and memory "
3652 "deallocation are deferred on close.",
3653 cam->v4ldev->minor, cam->command)
3654 cam->misconfigured = 1;
3655 w9968cf_stop_transfer(cam);
3656 wake_up_interruptible(&cam->wait_queue);
3657 } else
3658 w9968cf_release_resources(cam);
3659
3660 up(&cam->dev_sem);
3661
3662 if (!cam->users)
3663 kfree(cam);
3664 }
3665
3666 up_write(&w9968cf_disconnect);
3667 }
3668
3669
3670 static struct usb_driver w9968cf_usb_driver = {
3671 .name = "w9968cf",
3672 .id_table = winbond_id_table,
3673 .probe = w9968cf_usb_probe,
3674 .disconnect = w9968cf_usb_disconnect,
3675 };
3676
3677
3678
3679 /****************************************************************************
3680 * Module init, exit and intermodule communication *
3681 ****************************************************************************/
3682
3683 static int w9968cf_vppmod_detect(struct w9968cf_device* cam)
3684 {
3685 if (!w9968cf_vpp)
3686 if (vppmod_load)
3687 request_module("w9968cf-vpp");
3688
3689 down(&w9968cf_vppmod_lock);
3690
3691 if (!w9968cf_vpp) {
3692 DBG(4, "Video post-processing module not detected")
3693 w9968cf_adjust_configuration(cam);
3694 goto out;
3695 }
3696
3697 if (!try_module_get(w9968cf_vpp->owner)) {
3698 DBG(1, "Couldn't increment the reference count of "
3699 "the video post-processing module")
3700 up(&w9968cf_vppmod_lock);
3701 return -ENOSYS;
3702 }
3703
3704 w9968cf_vpp->busy++;
3705
3706 DBG(5, "Video post-processing module detected")
3707
3708 out:
3709 up(&w9968cf_vppmod_lock);
3710 return 0;
3711 }
3712
3713
3714 static void w9968cf_vppmod_release(struct w9968cf_device* cam)
3715 {
3716 down(&w9968cf_vppmod_lock);
3717
3718 if (w9968cf_vpp && w9968cf_vpp->busy) {
3719 module_put(w9968cf_vpp->owner);
3720 w9968cf_vpp->busy--;
3721 wake_up(&w9968cf_vppmod_wait);
3722 DBG(5, "Video post-processing module released")
3723 }
3724
3725 up(&w9968cf_vppmod_lock);
3726 }
3727
3728
3729 int w9968cf_vppmod_register(struct w9968cf_vpp_t* vpp)
3730 {
3731 down(&w9968cf_vppmod_lock);
3732
3733 if (w9968cf_vpp) {
3734 KDBG(1, "Video post-processing module already registered")
3735 up(&w9968cf_vppmod_lock);
3736 return -EINVAL;
3737 }
3738
3739 w9968cf_vpp = vpp;
3740 w9968cf_vpp->busy = 0;
3741
3742 KDBG(2, "Video post-processing module registered")
3743 up(&w9968cf_vppmod_lock);
3744 return 0;
3745 }
3746
3747
3748 int w9968cf_vppmod_deregister(struct w9968cf_vpp_t* vpp)
3749 {
3750 down(&w9968cf_vppmod_lock);
3751
3752 if (!w9968cf_vpp) {
3753 up(&w9968cf_vppmod_lock);
3754 return -EINVAL;
3755 }
3756
3757 if (w9968cf_vpp != vpp) {
3758 KDBG(1, "Only the owner can unregister the video "
3759 "post-processing module")
3760 up(&w9968cf_vppmod_lock);
3761 return -EINVAL;
3762 }
3763
3764 if (w9968cf_vpp->busy) {
3765 KDBG(2, "Video post-processing module busy. Wait for it to be "
3766 "released...")
3767 up(&w9968cf_vppmod_lock);
3768 wait_event(w9968cf_vppmod_wait, !w9968cf_vpp->busy);
3769 w9968cf_vpp = NULL;
3770 goto out;
3771 }
3772
3773 w9968cf_vpp = NULL;
3774
3775 up(&w9968cf_vppmod_lock);
3776
3777 out:
3778 KDBG(2, "Video post-processing module unregistered")
3779 return 0;
3780 }
3781
3782
3783 static int __init w9968cf_module_init(void)
3784 {
3785 int err;
3786
3787 KDBG(2, W9968CF_MODULE_NAME" "W9968CF_MODULE_VERSION)
3788 KDBG(3, W9968CF_MODULE_AUTHOR)
3789
3790 if (ovmod_load)
3791 request_module("ovcamchip");
3792
3793 if ((err = usb_register(&w9968cf_usb_driver)))
3794 return err;
3795
3796 return 0;
3797 }
3798
3799
3800 static void __exit w9968cf_module_exit(void)
3801 {
3802 /* w9968cf_usb_disconnect() will be called */
3803 usb_deregister(&w9968cf_usb_driver);
3804
3805 KDBG(2, W9968CF_MODULE_NAME" deregistered")
3806 }
3807
3808
3809 module_init(w9968cf_module_init);
3810 module_exit(w9968cf_module_exit);
3811
3812
3813 EXPORT_SYMBOL(w9968cf_vppmod_register);
3814 EXPORT_SYMBOL(w9968cf_vppmod_deregister);
Linux kernel - Deliverables
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