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V4L/DVB (10135): v4l2: introduce v4l2_file_operations.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / sn9c102 / sn9c102_core.c
CommitLineData
1da177e4 1/***************************************************************************
f327ebbd 2 * V4L2 driver for SN9C1xx PC Camera Controllers *
1da177e4 3 * *
f327ebbd 4 * Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it> *
1da177e4
LT		 5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/param.h>
1da177e4
LT		 25#include <linux/errno.h>
26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/device.h>
28#include <linux/fs.h>
29#include <linux/delay.h>
1da177e4
LT		 30#include <linux/compiler.h>
31#include <linux/ioctl.h>
32#include <linux/poll.h>
33#include <linux/stat.h>
34#include <linux/mm.h>
35#include <linux/vmalloc.h>
36#include <linux/page-flags.h>
9a6ab769 37#include <asm/byteorder.h>
1da177e4
LT		 38#include <asm/page.h>
39#include <asm/uaccess.h>
40
41#include "sn9c102.h"
42
43/*****************************************************************************/
44
f327ebbd 45#define SN9C102_MODULE_NAME "V4L2 driver for SN9C1xx PC Camera Controllers"
f423b9a8
LR		 46#define SN9C102_MODULE_ALIAS "sn9c1xx"
47#define SN9C102_MODULE_AUTHOR "(C) 2004-2007 Luca Risolia"
cd6fcc55
LR		 48#define SN9C102_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
49#define SN9C102_MODULE_LICENSE "GPL"
ddef2dcc 50#define SN9C102_MODULE_VERSION "1:1.47pre49"
3770be34 51#define SN9C102_MODULE_VERSION_CODE KERNEL_VERSION(1, 1, 47)
cd6fcc55
LR		 52
53/*****************************************************************************/
54
1da177e4
LT		 55MODULE_DEVICE_TABLE(usb, sn9c102_id_table);
56
57MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL);
58MODULE_DESCRIPTION(SN9C102_MODULE_NAME);
f423b9a8 59MODULE_ALIAS(SN9C102_MODULE_ALIAS);
1da177e4
LT		 60MODULE_VERSION(SN9C102_MODULE_VERSION);
61MODULE_LICENSE(SN9C102_MODULE_LICENSE);
62
63static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1};
64module_param_array(video_nr, short, NULL, 0444);
65MODULE_PARM_DESC(video_nr,
3770be34
LR		 66 " <-1|n[,...]>"
67 "\nSpecify V4L2 minor mode number."
68 "\n-1 = use next available (default)"
69 "\n n = use minor number n (integer >= 0)"
d56410e0
MCC		 70 "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES)
71 " cameras this way."
72 "\nFor example:"
73 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
74 "\nthe second camera and use auto for the first"
75 "\none and for every other camera."
76 "\n");
77
78static short force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] =
79 SN9C102_FORCE_MUNMAP};
1da177e4
LT		 80module_param_array(force_munmap, bool, NULL, 0444);
81MODULE_PARM_DESC(force_munmap,
3770be34
LR		 82 " <0|1[,...]>"
83 "\nForce the application to unmap previously"
d56410e0
MCC		 84 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
85 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
86 "\nthis feature. This parameter is specific for each"
87 "\ndetected camera."
3770be34
LR		 88 "\n0 = do not force memory unmapping"
89 "\n1 = force memory unmapping (save memory)"
d56410e0
MCC		 90 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
91 "\n");
1da177e4 92
2ffab02f 93static unsigned int frame_timeout[] = {[0 ... SN9C102_MAX_DEVICES-1] =
d56410e0 94 SN9C102_FRAME_TIMEOUT};
2ffab02f
LR		 95module_param_array(frame_timeout, uint, NULL, 0644);
96MODULE_PARM_DESC(frame_timeout,
3770be34
LR		 97 " <0|n[,...]>"
98 "\nTimeout for a video frame in seconds before"
f327ebbd 99 "\nreturning an I/O error; 0 for infinity."
d56410e0
MCC		 100 "\nThis parameter is specific for each detected camera."
101 "\nDefault value is "__MODULE_STRING(SN9C102_FRAME_TIMEOUT)"."
102 "\n");
2ffab02f 103
1da177e4
LT		 104#ifdef SN9C102_DEBUG
105static unsigned short debug = SN9C102_DEBUG_LEVEL;
106module_param(debug, ushort, 0644);
107MODULE_PARM_DESC(debug,
3770be34
LR		 108 " <n>"
109 "\nDebugging information level, from 0 to 3:"
d56410e0
MCC		 110 "\n0 = none (use carefully)"
111 "\n1 = critical errors"
112 "\n2 = significant informations"
113 "\n3 = more verbose messages"
f423b9a8 114 "\nLevel 3 is useful for testing only."
d56410e0
MCC		 115 "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"."
116 "\n");
1da177e4
LT		 117#endif
118
d45b9b8a
HV		 119/*
120 Add the probe entries to this table. Be sure to add the entry in the right
121 place, since, on failure, the next probing routine is called according to
122 the order of the list below, from top to bottom.
123*/
124static int (*sn9c102_sensor_table[])(struct sn9c102_device *) = {
125 &sn9c102_probe_hv7131d, /* strong detection based on SENSOR ids */
126 &sn9c102_probe_hv7131r, /* strong detection based on SENSOR ids */
127 &sn9c102_probe_mi0343, /* strong detection based on SENSOR ids */
128 &sn9c102_probe_mi0360, /* strong detection based on SENSOR ids */
129 &sn9c102_probe_mt9v111, /* strong detection based on SENSOR ids */
130 &sn9c102_probe_pas106b, /* strong detection based on SENSOR ids */
131 &sn9c102_probe_pas202bcb, /* strong detection based on SENSOR ids */
132 &sn9c102_probe_ov7630, /* strong detection based on SENSOR ids */
133 &sn9c102_probe_ov7660, /* strong detection based on SENSOR ids */
134 &sn9c102_probe_tas5110c1b, /* detection based on USB pid/vid */
135 &sn9c102_probe_tas5110d, /* detection based on USB pid/vid */
136 &sn9c102_probe_tas5130d1b, /* detection based on USB pid/vid */
137};
138
1da177e4
LT		 139/*****************************************************************************/
140
d56410e0
MCC		 141static u32
142sn9c102_request_buffers(struct sn9c102_device* cam, u32 count,
143 enum sn9c102_io_method io)
1da177e4 144{
2ffab02f
LR		 145 struct v4l2_pix_format* p = &(cam->sensor.pix_format);
146 struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
f327ebbd 147 size_t imagesize = cam->module_param.force_munmap || io == IO_READ ?
f423b9a8
LR		 148 (p->width * p->height * p->priv) / 8 :
149 (r->width * r->height * p->priv) / 8;
1da177e4
LT		 150 void* buff = NULL;
151 u32 i;
152
153 if (count > SN9C102_MAX_FRAMES)
154 count = SN9C102_MAX_FRAMES;
155
f327ebbd
LR		 156 if (cam->bridge == BRIDGE_SN9C105 || cam->bridge == BRIDGE_SN9C120)
157 imagesize += 589 + 2; /* length of JPEG header + EOI marker */
158
1da177e4
LT		 159 cam->nbuffers = count;
160 while (cam->nbuffers > 0) {
f327ebbd
LR		 161 if ((buff = vmalloc_32_user(cam->nbuffers *
162 PAGE_ALIGN(imagesize))))
1da177e4
LT		 163 break;
164 cam->nbuffers--;
165 }
166
167 for (i = 0; i < cam->nbuffers; i++) {
168 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
169 cam->frame[i].buf.index = i;
170 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
171 cam->frame[i].buf.length = imagesize;
172 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
173 cam->frame[i].buf.sequence = 0;
174 cam->frame[i].buf.field = V4L2_FIELD_NONE;
175 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
176 cam->frame[i].buf.flags = 0;
177 }
178
179 return cam->nbuffers;
180}
181
182
183static void sn9c102_release_buffers(struct sn9c102_device* cam)
184{
185 if (cam->nbuffers) {
cd6fcc55 186 vfree(cam->frame[0].bufmem);
1da177e4
LT		 187 cam->nbuffers = 0;
188 }
a966f3e7 189 cam->frame_current = NULL;
1da177e4
LT		 190}
191
192
193static void sn9c102_empty_framequeues(struct sn9c102_device* cam)
194{
195 u32 i;
196
197 INIT_LIST_HEAD(&cam->inqueue);
198 INIT_LIST_HEAD(&cam->outqueue);
199
200 for (i = 0; i < SN9C102_MAX_FRAMES; i++) {
201 cam->frame[i].state = F_UNUSED;
202 cam->frame[i].buf.bytesused = 0;
203 }
204}
205
206
a966f3e7
LR		 207static void sn9c102_requeue_outqueue(struct sn9c102_device* cam)
208{
209 struct sn9c102_frame_t *i;
210
211 list_for_each_entry(i, &cam->outqueue, frame) {
212 i->state = F_QUEUED;
213 list_add(&i->frame, &cam->inqueue);
214 }
215
216 INIT_LIST_HEAD(&cam->outqueue);
217}
218
219
1da177e4
LT		 220static void sn9c102_queue_unusedframes(struct sn9c102_device* cam)
221{
222 unsigned long lock_flags;
223 u32 i;
224
225 for (i = 0; i < cam->nbuffers; i++)
226 if (cam->frame[i].state == F_UNUSED) {
227 cam->frame[i].state = F_QUEUED;
228 spin_lock_irqsave(&cam->queue_lock, lock_flags);
229 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
230 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
231 }
232}
233
234/*****************************************************************************/
480b55c2 235
c680dd60 236/*
480b55c2
LR		 237 Write a sequence of count value/register pairs. Returns -1 after the first
238 failed write, or 0 for no errors.
239*/
c680dd60
TP		 240int sn9c102_write_regs(struct sn9c102_device* cam, const u8 valreg[][2],
241 int count)
a966f3e7
LR		 242{
243 struct usb_device* udev = cam->usbdev;
480b55c2 244 u8* buff = cam->control_buffer;
a966f3e7
LR		 245 int i, res;
246
c680dd60
TP		 247 for (i = 0; i < count; i++) {
248 u8 index = valreg[i][1];
249
250 /*
480b55c2
LR		 251 index is a u8, so it must be <256 and can't be out of range.
252 If we put in a check anyway, gcc annoys us with a warning
253 hat our check is useless. People get all uppity when they
254 see warnings in the kernel compile.
255 */
256
257 *buff = valreg[i][0];
258
259 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08,
260 0x41, index, 0, buff, 1,
261 SN9C102_CTRL_TIMEOUT);
262
c680dd60
TP		 263 if (res < 0) {
264 DBG(3, "Failed to write a register (value 0x%02X, "
480b55c2 265 "index 0x%02X, error %d)", *buff, index, res);
c680dd60
TP		 266 return -1;
267 }
a966f3e7 268
480b55c2 269 cam->reg[index] = *buff;
a966f3e7
LR		 270 }
271
a966f3e7
LR		 272 return 0;
273}
274
275
1da177e4
LT		 276int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index)
277{
278 struct usb_device* udev = cam->usbdev;
279 u8* buff = cam->control_buffer;
280 int res;
281
a966f3e7
LR		 282 if (index >= ARRAY_SIZE(cam->reg))
283 return -1;
284
1da177e4
LT		 285 *buff = value;
286
287 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
d56410e0 288 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
1da177e4
LT		 289 if (res < 0) {
290 DBG(3, "Failed to write a register (value 0x%02X, index "
a966f3e7 291 "0x%02X, error %d)", value, index, res);
1da177e4
LT		 292 return -1;
293 }
294
295 cam->reg[index] = value;
296
297 return 0;
298}
299
300
480b55c2
LR		 301/* NOTE: with the SN9C10[123] reading some registers always returns 0 */
302int sn9c102_read_reg(struct sn9c102_device* cam, u16 index)
1da177e4
LT		 303{
304 struct usb_device* udev = cam->usbdev;
305 u8* buff = cam->control_buffer;
306 int res;
307
308 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
d56410e0 309 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
1da177e4
LT		 310 if (res < 0)
311 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
a966f3e7 312 index, res);
1da177e4
LT		 313
314 return (res >= 0) ? (int)(*buff) : -1;
315}
316
317
318int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index)
319{
a966f3e7
LR		 320 if (index >= ARRAY_SIZE(cam->reg))
321 return -1;
1da177e4
LT		 322
323 return cam->reg[index];
324}
325
326
327static int
480b55c2
LR		 328sn9c102_i2c_wait(struct sn9c102_device* cam,
329 const struct sn9c102_sensor* sensor)
1da177e4
LT		 330{
331 int i, r;
332
333 for (i = 1; i <= 5; i++) {
334 r = sn9c102_read_reg(cam, 0x08);
335 if (r < 0)
336 return -EIO;
337 if (r & 0x04)
338 return 0;
339 if (sensor->frequency & SN9C102_I2C_400KHZ)
340 udelay(5*16);
341 else
342 udelay(16*16);
343 }
344 return -EBUSY;
345}
346
347
348static int
d56410e0 349sn9c102_i2c_detect_read_error(struct sn9c102_device* cam,
480b55c2 350 const struct sn9c102_sensor* sensor)
1da177e4 351{
f327ebbd
LR		 352 int r , err = 0;
353
1da177e4 354 r = sn9c102_read_reg(cam, 0x08);
f327ebbd
LR		 355 if (r < 0)
356 err += r;
357
358 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
359 if (!(r & 0x08))
360 err += -1;
361 } else {
362 if (r & 0x08)
363 err += -1;
364 }
365
366 return err ? -EIO : 0;
1da177e4
LT		 367}
368
369
370static int
d56410e0 371sn9c102_i2c_detect_write_error(struct sn9c102_device* cam,
480b55c2 372 const struct sn9c102_sensor* sensor)
1da177e4
LT		 373{
374 int r;
375 r = sn9c102_read_reg(cam, 0x08);
376 return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0;
377}
378
379
d56410e0 380int
1da177e4 381sn9c102_i2c_try_raw_read(struct sn9c102_device* cam,
480b55c2
LR		 382 const struct sn9c102_sensor* sensor, u8 data0,
383 u8 data1, u8 n, u8 buffer[])
1da177e4
LT		 384{
385 struct usb_device* udev = cam->usbdev;
386 u8* data = cam->control_buffer;
480b55c2 387 int i = 0, err = 0, res;
1da177e4
LT		 388
389 /* Write cycle */
390 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
d56410e0 391 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10;
1da177e4
LT		 392 data[1] = data0; /* I2C slave id */
393 data[2] = data1; /* address */
394 data[7] = 0x10;
395 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
d56410e0 396 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
1da177e4
LT		 397 if (res < 0)
398 err += res;
399
400 err += sn9c102_i2c_wait(cam, sensor);
401
402 /* Read cycle - n bytes */
403 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
d56410e0
MCC		 404 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) |
405 (n << 4) | 0x02;
1da177e4
LT		 406 data[1] = data0;
407 data[7] = 0x10;
408 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
d56410e0 409 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
1da177e4
LT		 410 if (res < 0)
411 err += res;
412
413 err += sn9c102_i2c_wait(cam, sensor);
414
415 /* The first read byte will be placed in data[4] */
416 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
d56410e0 417 0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT);
1da177e4
LT		 418 if (res < 0)
419 err += res;
420
421 err += sn9c102_i2c_detect_read_error(cam, sensor);
422
423 PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1,
a966f3e7 424 data[4]);
1da177e4
LT		 425
426 if (err) {
a966f3e7 427 DBG(3, "I2C read failed for %s image sensor", sensor->name);
1da177e4
LT		 428 return -1;
429 }
430
431 if (buffer)
480b55c2
LR		 432 for (i = 0; i < n && i < 5; i++)
433 buffer[n-i-1] = data[4-i];
1da177e4
LT		 434
435 return (int)data[4];
436}
437
438
d56410e0 439int
1da177e4 440sn9c102_i2c_try_raw_write(struct sn9c102_device* cam,
480b55c2 441 const struct sn9c102_sensor* sensor, u8 n, u8 data0,
d56410e0 442 u8 data1, u8 data2, u8 data3, u8 data4, u8 data5)
1da177e4
LT		 443{
444 struct usb_device* udev = cam->usbdev;
445 u8* data = cam->control_buffer;
446 int err = 0, res;
447
448 /* Write cycle. It usually is address + value */
449 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
d56410e0
MCC		 450 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0)
451 | ((n - 1) << 4);
1da177e4
LT		 452 data[1] = data0;
453 data[2] = data1;
454 data[3] = data2;
455 data[4] = data3;
456 data[5] = data4;
457 data[6] = data5;
f327ebbd 458 data[7] = 0x17;
1da177e4 459 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
d56410e0 460 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
1da177e4
LT		 461 if (res < 0)
462 err += res;
463
464 err += sn9c102_i2c_wait(cam, sensor);
465 err += sn9c102_i2c_detect_write_error(cam, sensor);
466
467 if (err)
a966f3e7 468 DBG(3, "I2C write failed for %s image sensor", sensor->name);
1da177e4
LT		 469
470 PDBGG("I2C raw write: %u bytes, data0 = 0x%02X, data1 = 0x%02X, "
471 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X",
a966f3e7 472 n, data0, data1, data2, data3, data4, data5);
1da177e4
LT		 473
474 return err ? -1 : 0;
475}
476
477
478int
479sn9c102_i2c_try_read(struct sn9c102_device* cam,
480b55c2 480 const struct sn9c102_sensor* sensor, u8 address)
1da177e4
LT		 481{
482 return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id,
d56410e0 483 address, 1, NULL);
1da177e4
LT		 484}
485
486
762250f8
AB		 487static int sn9c102_i2c_try_write(struct sn9c102_device* cam,
488 const struct sn9c102_sensor* sensor,
489 u8 address, u8 value)
1da177e4 490{
d56410e0
MCC		 491 return sn9c102_i2c_try_raw_write(cam, sensor, 3,
492 sensor->i2c_slave_id, address,
493 value, 0, 0, 0);
1da177e4
LT		 494}
495
496
497int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address)
498{
2ffab02f 499 return sn9c102_i2c_try_read(cam, &cam->sensor, address);
1da177e4
LT		 500}
501
502
503int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value)
504{
2ffab02f 505 return sn9c102_i2c_try_write(cam, &cam->sensor, address, value);
1da177e4
LT		 506}
507
508/*****************************************************************************/
509
f327ebbd 510static size_t sn9c102_sof_length(struct sn9c102_device* cam)
1da177e4 511{
a966f3e7
LR		 512 switch (cam->bridge) {
513 case BRIDGE_SN9C101:
514 case BRIDGE_SN9C102:
f327ebbd 515 return 12;
a966f3e7 516 case BRIDGE_SN9C103:
f327ebbd
LR		 517 return 18;
518 case BRIDGE_SN9C105:
519 case BRIDGE_SN9C120:
520 return 62;
a966f3e7 521 }
1da177e4 522
f327ebbd
LR		 523 return 0;
524}
525
526
527static void*
528sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len)
529{
7e81d825 530 static const char marker[6] = {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96};
f423b9a8
LR		 531 const char *m = mem;
532 size_t soflen = 0, i, j;
f327ebbd
LR		 533
534 soflen = sn9c102_sof_length(cam);
535
f423b9a8
LR		 536 for (i = 0; i < len; i++) {
537 size_t b;
538
539 /* Read the variable part of the header */
540 if (unlikely(cam->sof.bytesread >= sizeof(marker))) {
541 cam->sof.header[cam->sof.bytesread] = *(m+i);
542 if (++cam->sof.bytesread == soflen) {
543 cam->sof.bytesread = 0;
544 return mem + i;
545 }
546 continue;
547 }
548
549 /* Search for the SOF marker (fixed part) in the header */
550 for (j = 0, b=cam->sof.bytesread; j+b < sizeof(marker); j++) {
05b20792 551 if (unlikely(i+j == len))
f423b9a8
LR		 552 return NULL;
553 if (*(m+i+j) == marker[cam->sof.bytesread]) {
554 cam->sof.header[cam->sof.bytesread] = *(m+i+j);
555 if (++cam->sof.bytesread == sizeof(marker)) {
556 PDBGG("Bytes to analyze: %zd. SOF "
557 "starts at byte #%zd", len, i);
558 i += j+1;
559 break;
560 }
561 } else {
562 cam->sof.bytesread = 0;
563 break;
1da177e4 564 }
f423b9a8
LR		 565 }
566 }
1da177e4
LT		 567
568 return NULL;
569}
570
571
572static void*
573sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len)
574{
7e81d825 575 static const u8 eof_header[4][4] = {
f327ebbd
LR		 576 {0x00, 0x00, 0x00, 0x00},
577 {0x40, 0x00, 0x00, 0x00},
578 {0x80, 0x00, 0x00, 0x00},
579 {0xc0, 0x00, 0x00, 0x00},
580 };
581 size_t i, j;
1da177e4 582
f423b9a8 583 /* The EOF header does not exist in compressed data */
f327ebbd
LR		 584 if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
585 cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
f423b9a8 586 return NULL;
1da177e4 587
f423b9a8
LR		 588 /*
589 The EOF header might cross the packet boundary, but this is not a
590 problem, since the end of a frame is determined by checking its size
591 in the first place.
592 */
f327ebbd
LR		 593 for (i = 0; (len >= 4) && (i <= len - 4); i++)
594 for (j = 0; j < ARRAY_SIZE(eof_header); j++)
595 if (!memcmp(mem + i, eof_header[j], 4))
1da177e4
LT		 596 return mem + i;
597
598 return NULL;
599}
600
601
f327ebbd
LR		 602static void
603sn9c102_write_jpegheader(struct sn9c102_device* cam, struct sn9c102_frame_t* f)
604{
7e81d825 605 static const u8 jpeg_header[589] = {
f327ebbd
LR		 606 0xff, 0xd8, 0xff, 0xdb, 0x00, 0x84, 0x00, 0x06, 0x04, 0x05,
607 0x06, 0x05, 0x04, 0x06, 0x06, 0x05, 0x06, 0x07, 0x07, 0x06,
608 0x08, 0x0a, 0x10, 0x0a, 0x0a, 0x09, 0x09, 0x0a, 0x14, 0x0e,
609 0x0f, 0x0c, 0x10, 0x17, 0x14, 0x18, 0x18, 0x17, 0x14, 0x16,
610 0x16, 0x1a, 0x1d, 0x25, 0x1f, 0x1a, 0x1b, 0x23, 0x1c, 0x16,
611 0x16, 0x20, 0x2c, 0x20, 0x23, 0x26, 0x27, 0x29, 0x2a, 0x29,
612 0x19, 0x1f, 0x2d, 0x30, 0x2d, 0x28, 0x30, 0x25, 0x28, 0x29,
613 0x28, 0x01, 0x07, 0x07, 0x07, 0x0a, 0x08, 0x0a, 0x13, 0x0a,
614 0x0a, 0x13, 0x28, 0x1a, 0x16, 0x1a, 0x28, 0x28, 0x28, 0x28,
615 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
616 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
617 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
618 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
619 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0xff, 0xc4, 0x01, 0xa2,
620 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
621 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02,
622 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x01,
623 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
624 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03,
625 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x10, 0x00,
626 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04,
627 0x04, 0x00, 0x00, 0x01, 0x7d, 0x01, 0x02, 0x03, 0x00, 0x04,
628 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61,
629 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23,
630 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62,
631 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25,
632 0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38,
633 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
634 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64,
635 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
636 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
637 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
638 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa,
639 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2,
640 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3,
641 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3,
642 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3,
643 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0x11, 0x00, 0x02,
644 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04,
645 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04,
646 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
647 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1,
648 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1,
649 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19,
650 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
651 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
652 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64,
653 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
654 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
655 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
656 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9,
657 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba,
658 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
659 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3,
660 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4,
661 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xff, 0xc0, 0x00, 0x11,
662 0x08, 0x01, 0xe0, 0x02, 0x80, 0x03, 0x01, 0x21, 0x00, 0x02,
663 0x11, 0x01, 0x03, 0x11, 0x01, 0xff, 0xda, 0x00, 0x0c, 0x03,
664 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00
665 };
666 u8 *pos = f->bufmem;
667
668 memcpy(pos, jpeg_header, sizeof(jpeg_header));
669 *(pos + 6) = 0x00;
670 *(pos + 7 + 64) = 0x01;
671 if (cam->compression.quality == 0) {
672 memcpy(pos + 7, SN9C102_Y_QTABLE0, 64);
673 memcpy(pos + 8 + 64, SN9C102_UV_QTABLE0, 64);
674 } else if (cam->compression.quality == 1) {
675 memcpy(pos + 7, SN9C102_Y_QTABLE1, 64);
676 memcpy(pos + 8 + 64, SN9C102_UV_QTABLE1, 64);
677 }
678 *(pos + 564) = cam->sensor.pix_format.width & 0xFF;
679 *(pos + 563) = (cam->sensor.pix_format.width >> 8) & 0xFF;
680 *(pos + 562) = cam->sensor.pix_format.height & 0xFF;
681 *(pos + 561) = (cam->sensor.pix_format.height >> 8) & 0xFF;
682 *(pos + 567) = 0x21;
683
684 f->buf.bytesused += sizeof(jpeg_header);
685}
686
687
7d12e780 688static void sn9c102_urb_complete(struct urb *urb)
1da177e4
LT		 689{
690 struct sn9c102_device* cam = urb->context;
691 struct sn9c102_frame_t** f;
a966f3e7 692 size_t imagesize, soflen;
1da177e4
LT		 693 u8 i;
694 int err = 0;
695
696 if (urb->status == -ENOENT)
697 return;
698
699 f = &cam->frame_current;
700
701 if (cam->stream == STREAM_INTERRUPT) {
702 cam->stream = STREAM_OFF;
703 if ((*f))
704 (*f)->state = F_QUEUED;
f423b9a8 705 cam->sof.bytesread = 0;
f327ebbd 706 DBG(3, "Stream interrupted by application");
2ffab02f 707 wake_up(&cam->wait_stream);
1da177e4
LT		 708 }
709
710 if (cam->state & DEV_DISCONNECTED)
711 return;
712
713 if (cam->state & DEV_MISCONFIGURED) {
714 wake_up_interruptible(&cam->wait_frame);
715 return;
716 }
717
718 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
719 goto resubmit_urb;
720
721 if (!(*f))
722 (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t,
d56410e0 723 frame);
1da177e4 724
2ffab02f 725 imagesize = (cam->sensor.pix_format.width *
d56410e0
MCC		 726 cam->sensor.pix_format.height *
727 cam->sensor.pix_format.priv) / 8;
f327ebbd
LR		 728 if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
729 imagesize += 589; /* length of jpeg header */
730 soflen = sn9c102_sof_length(cam);
a966f3e7 731
1da177e4
LT		 732 for (i = 0; i < urb->number_of_packets; i++) {
733 unsigned int img, len, status;
734 void *pos, *sof, *eof;
735
736 len = urb->iso_frame_desc[i].actual_length;
737 status = urb->iso_frame_desc[i].status;
738 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
739
740 if (status) {
a966f3e7 741 DBG(3, "Error in isochronous frame");
1da177e4 742 (*f)->state = F_ERROR;
f423b9a8 743 cam->sof.bytesread = 0;
1da177e4
LT		 744 continue;
745 }
746
a966f3e7 747 PDBGG("Isochrnous frame: length %u, #%u i", len, i);
1da177e4
LT		 748
749redo:
750 sof = sn9c102_find_sof_header(cam, pos, len);
2ffab02f 751 if (likely(!sof)) {
1da177e4
LT		 752 eof = sn9c102_find_eof_header(cam, pos, len);
753 if ((*f)->state == F_GRABBING) {
754end_of_frame:
755 img = len;
756
757 if (eof)
758 img = (eof > pos) ? eof - pos - 1 : 0;
759
f423b9a8 760 if ((*f)->buf.bytesused + img > imagesize) {
2ffab02f
LR		 761 u32 b;
762 b = (*f)->buf.bytesused + img -
763 imagesize;
1da177e4 764 img = imagesize - (*f)->buf.bytesused;
f423b9a8
LR		 765 PDBGG("Expected EOF not found: video "
766 "frame cut");
1da177e4
LT		 767 if (eof)
768 DBG(3, "Exceeded limit: +%u "
a966f3e7 769 "bytes", (unsigned)(b));
1da177e4
LT		 770 }
771
772 memcpy((*f)->bufmem + (*f)->buf.bytesused, pos,
773 img);
774
775 if ((*f)->buf.bytesused == 0)
776 do_gettimeofday(&(*f)->buf.timestamp);
777
778 (*f)->buf.bytesused += img;
779
780 if ((*f)->buf.bytesused == imagesize ||
f327ebbd
LR		 781 ((cam->sensor.pix_format.pixelformat ==
782 V4L2_PIX_FMT_SN9C10X ||
783 cam->sensor.pix_format.pixelformat ==
784 V4L2_PIX_FMT_JPEG) && eof)) {
2ffab02f 785 u32 b;
f327ebbd 786
2ffab02f 787 b = (*f)->buf.bytesused;
1da177e4
LT		 788 (*f)->state = F_DONE;
789 (*f)->buf.sequence= ++cam->frame_count;
f327ebbd 790
a966f3e7 791 spin_lock(&cam->queue_lock);
1da177e4 792 list_move_tail(&(*f)->frame,
d56410e0 793 &cam->outqueue);
1da177e4
LT		 794 if (!list_empty(&cam->inqueue))
795 (*f) = list_entry(
d56410e0
MCC		 796 cam->inqueue.next,
797 struct sn9c102_frame_t,
798 frame );
1da177e4
LT		 799 else
800 (*f) = NULL;
a966f3e7 801 spin_unlock(&cam->queue_lock);
f327ebbd 802
1da177e4 803 memcpy(cam->sysfs.frame_header,
f423b9a8 804 cam->sof.header, soflen);
f327ebbd 805
a966f3e7
LR		 806 DBG(3, "Video frame captured: %lu "
807 "bytes", (unsigned long)(b));
1da177e4
LT		 808
809 if (!(*f))
810 goto resubmit_urb;
811
812 } else if (eof) {
813 (*f)->state = F_ERROR;
814 DBG(3, "Not expected EOF after %lu "
d56410e0 815 "bytes of image data",
a966f3e7
LR		 816 (unsigned long)
817 ((*f)->buf.bytesused));
1da177e4
LT		 818 }
819
820 if (sof) /* (1) */
821 goto start_of_frame;
822
823 } else if (eof) {
a966f3e7 824 DBG(3, "EOF without SOF");
1da177e4
LT		 825 continue;
826
827 } else {
a966f3e7 828 PDBGG("Ignoring pointless isochronous frame");
1da177e4
LT		 829 continue;
830 }
831
832 } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) {
833start_of_frame:
834 (*f)->state = F_GRABBING;
835 (*f)->buf.bytesused = 0;
836 len -= (sof - pos);
837 pos = sof;
f327ebbd
LR		 838 if (cam->sensor.pix_format.pixelformat ==
839 V4L2_PIX_FMT_JPEG)
840 sn9c102_write_jpegheader(cam, (*f));
a966f3e7 841 DBG(3, "SOF detected: new video frame");
1da177e4
LT		 842 if (len)
843 goto redo;
844
845 } else if ((*f)->state == F_GRABBING) {
846 eof = sn9c102_find_eof_header(cam, pos, len);
847 if (eof && eof < sof)
848 goto end_of_frame; /* (1) */
849 else {
2ffab02f 850 if (cam->sensor.pix_format.pixelformat ==
f327ebbd
LR		 851 V4L2_PIX_FMT_SN9C10X ||
852 cam->sensor.pix_format.pixelformat ==
853 V4L2_PIX_FMT_JPEG) {
f423b9a8
LR		 854 if (sof - pos >= soflen) {
855 eof = sof - soflen;
856 } else { /* remove header */
857 eof = pos;
858 (*f)->buf.bytesused -=
859 (soflen - (sof - pos));
860 }
1da177e4
LT		 861 goto end_of_frame;
862 } else {
863 DBG(3, "SOF before expected EOF after "
d56410e0 864 "%lu bytes of image data",
a966f3e7
LR		 865 (unsigned long)
866 ((*f)->buf.bytesused));
1da177e4
LT		 867 goto start_of_frame;
868 }
869 }
870 }
871 }
872
873resubmit_urb:
874 urb->dev = cam->usbdev;
875 err = usb_submit_urb(urb, GFP_ATOMIC);
876 if (err < 0 && err != -EPERM) {
877 cam->state |= DEV_MISCONFIGURED;
a966f3e7 878 DBG(1, "usb_submit_urb() failed");
1da177e4
LT		 879 }
880
881 wake_up_interruptible(&cam->wait_frame);
882}
883
884
885static int sn9c102_start_transfer(struct sn9c102_device* cam)
886{
887 struct usb_device *udev = cam->usbdev;
888 struct urb* urb;
f327ebbd
LR		 889 struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
890 usb_ifnum_to_if(udev, 0),
891 SN9C102_ALTERNATE_SETTING);
892 const unsigned int psz = le16_to_cpu(altsetting->
893 endpoint[0].desc.wMaxPacketSize);
1da177e4
LT		 894 s8 i, j;
895 int err = 0;
896
897 for (i = 0; i < SN9C102_URBS; i++) {
cd6fcc55 898 cam->transfer_buffer[i] = kzalloc(SN9C102_ISO_PACKETS * psz,
d56410e0 899 GFP_KERNEL);
1da177e4
LT		 900 if (!cam->transfer_buffer[i]) {
901 err = -ENOMEM;
a966f3e7 902 DBG(1, "Not enough memory");
1da177e4
LT		 903 goto free_buffers;
904 }
905 }
906
907 for (i = 0; i < SN9C102_URBS; i++) {
908 urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL);
909 cam->urb[i] = urb;
910 if (!urb) {
911 err = -ENOMEM;
a966f3e7 912 DBG(1, "usb_alloc_urb() failed");
1da177e4
LT		 913 goto free_urbs;
914 }
915 urb->dev = udev;
916 urb->context = cam;
917 urb->pipe = usb_rcvisocpipe(udev, 1);
918 urb->transfer_flags = URB_ISO_ASAP;
919 urb->number_of_packets = SN9C102_ISO_PACKETS;
920 urb->complete = sn9c102_urb_complete;
921 urb->transfer_buffer = cam->transfer_buffer[i];
922 urb->transfer_buffer_length = psz * SN9C102_ISO_PACKETS;
923 urb->interval = 1;
924 for (j = 0; j < SN9C102_ISO_PACKETS; j++) {
925 urb->iso_frame_desc[j].offset = psz * j;
926 urb->iso_frame_desc[j].length = psz;
927 }
928 }
929
930 /* Enable video */
931 if (!(cam->reg[0x01] & 0x04)) {
932 err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01);
933 if (err) {
934 err = -EIO;
a966f3e7 935 DBG(1, "I/O hardware error");
1da177e4
LT		 936 goto free_urbs;
937 }
938 }
939
940 err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING);
941 if (err) {
a966f3e7 942 DBG(1, "usb_set_interface() failed");
1da177e4
LT		 943 goto free_urbs;
944 }
945
946 cam->frame_current = NULL;
f423b9a8 947 cam->sof.bytesread = 0;
1da177e4
LT		 948
949 for (i = 0; i < SN9C102_URBS; i++) {
950 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
951 if (err) {
952 for (j = i-1; j >= 0; j--)
953 usb_kill_urb(cam->urb[j]);
a966f3e7 954 DBG(1, "usb_submit_urb() failed, error %d", err);
1da177e4
LT		 955 goto free_urbs;
956 }
957 }
958
959 return 0;
960
961free_urbs:
f327ebbd 962 for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++)
1da177e4
LT		 963 usb_free_urb(cam->urb[i]);
964
965free_buffers:
966 for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++)
967 kfree(cam->transfer_buffer[i]);
968
969 return err;
970}
971
972
973static int sn9c102_stop_transfer(struct sn9c102_device* cam)
974{
975 struct usb_device *udev = cam->usbdev;
976 s8 i;
977 int err = 0;
978
979 if (cam->state & DEV_DISCONNECTED)
980 return 0;
981
982 for (i = SN9C102_URBS-1; i >= 0; i--) {
983 usb_kill_urb(cam->urb[i]);
984 usb_free_urb(cam->urb[i]);
985 kfree(cam->transfer_buffer[i]);
986 }
987
988 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
989 if (err)
a966f3e7 990 DBG(3, "usb_set_interface() failed");
1da177e4
LT		 991
992 return err;
993}
994
995
7107627b 996static int sn9c102_stream_interrupt(struct sn9c102_device* cam)
1da177e4 997{
2ffab02f 998 long timeout;
1da177e4
LT		 999
1000 cam->stream = STREAM_INTERRUPT;
2ffab02f 1001 timeout = wait_event_timeout(cam->wait_stream,
d56410e0
MCC		 1002 (cam->stream == STREAM_OFF) ||
1003 (cam->state & DEV_DISCONNECTED),
1004 SN9C102_URB_TIMEOUT);
1da177e4
LT		 1005 if (cam->state & DEV_DISCONNECTED)
1006 return -ENODEV;
2ffab02f 1007 else if (cam->stream != STREAM_OFF) {
1da177e4 1008 cam->state |= DEV_MISCONFIGURED;
2ffab02f
LR		 1009 DBG(1, "URB timeout reached. The camera is misconfigured. "
1010 "To use it, close and open /dev/video%d again.",
c6330fb8 1011 cam->v4ldev->num);
2ffab02f 1012 return -EIO;
1da177e4
LT		 1013 }
1014
1015 return 0;
1016}
1017
1018/*****************************************************************************/
1019
cd6fcc55 1020#ifdef CONFIG_VIDEO_ADV_DEBUG
f327ebbd 1021static u16 sn9c102_strtou16(const char* buff, size_t len, ssize_t* count)
1da177e4 1022{
f327ebbd 1023 char str[7];
1da177e4
LT		 1024 char* endp;
1025 unsigned long val;
1026
f327ebbd 1027 if (len < 6) {
1da177e4 1028 strncpy(str, buff, len);
f423b9a8 1029 str[len] = '\0';
1da177e4 1030 } else {
f423b9a8 1031 strncpy(str, buff, 6);
f327ebbd 1032 str[6] = '\0';
1da177e4
LT		 1033 }
1034
1035 val = simple_strtoul(str, &endp, 0);
1036
1037 *count = 0;
f327ebbd 1038 if (val <= 0xffff)
1da177e4
LT		 1039 *count = (ssize_t)(endp - str);
1040 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
1041 *count += 1;
1042
f327ebbd 1043 return (u16)val;
1da177e4
LT		 1044}
1045
1046/*
1047 NOTE 1: being inside one of the following methods implies that the v4l
d56410e0 1048 device exists for sure (see kobjects and reference counters)
1da177e4
LT		 1049 NOTE 2: buffers are PAGE_SIZE long
1050*/
1051
54bd5b66
KS		 1052static ssize_t sn9c102_show_reg(struct device* cd,
1053 struct device_attribute *attr, char* buf)
1da177e4
LT		 1054{
1055 struct sn9c102_device* cam;
1056 ssize_t count;
1057
4186ecf8 1058 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1059 return -ERESTARTSYS;
1060
22a04f10 1061 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1062 if (!cam) {
4186ecf8 1063 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1064 return -ENODEV;
1065 }
1066
1067 count = sprintf(buf, "%u\n", cam->sysfs.reg);
1068
4186ecf8 1069 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1070
1071 return count;
d56410e0 1072}
1da177e4
LT		 1073
1074
d56410e0 1075static ssize_t
54bd5b66
KS		 1076sn9c102_store_reg(struct device* cd, struct device_attribute *attr,
1077 const char* buf, size_t len)
1da177e4
LT		 1078{
1079 struct sn9c102_device* cam;
f327ebbd 1080 u16 index;
1da177e4
LT		 1081 ssize_t count;
1082
4186ecf8 1083 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1084 return -ERESTARTSYS;
1085
22a04f10 1086 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1087 if (!cam) {
4186ecf8 1088 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1089 return -ENODEV;
1090 }
1091
f327ebbd
LR		 1092 index = sn9c102_strtou16(buf, len, &count);
1093 if (index >= ARRAY_SIZE(cam->reg) || !count) {
4186ecf8 1094 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1095 return -EINVAL;
1096 }
1097
1098 cam->sysfs.reg = index;
1099
f327ebbd 1100 DBG(2, "Moved SN9C1XX register index to 0x%02X", cam->sysfs.reg);
a966f3e7 1101 DBG(3, "Written bytes: %zd", count);
1da177e4 1102
4186ecf8 1103 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1104
1105 return count;
1106}
1107
1108
54bd5b66
KS		 1109static ssize_t sn9c102_show_val(struct device* cd,
1110 struct device_attribute *attr, char* buf)
1da177e4
LT		 1111{
1112 struct sn9c102_device* cam;
1113 ssize_t count;
1114 int val;
1115
4186ecf8 1116 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1117 return -ERESTARTSYS;
1118
22a04f10 1119 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1120 if (!cam) {
4186ecf8 1121 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1122 return -ENODEV;
1123 }
1124
1125 if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) {
4186ecf8 1126 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1127 return -EIO;
1128 }
1129
1130 count = sprintf(buf, "%d\n", val);
1131
f423b9a8 1132 DBG(3, "Read bytes: %zd, value: %d", count, val);
1da177e4 1133
4186ecf8 1134 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1135
1136 return count;
d56410e0 1137}
1da177e4
LT		 1138
1139
1140static ssize_t
54bd5b66
KS		 1141sn9c102_store_val(struct device* cd, struct device_attribute *attr,
1142 const char* buf, size_t len)
1da177e4
LT		 1143{
1144 struct sn9c102_device* cam;
f327ebbd 1145 u16 value;
1da177e4
LT		 1146 ssize_t count;
1147 int err;
1148
4186ecf8 1149 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1150 return -ERESTARTSYS;
1151
22a04f10 1152 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1153 if (!cam) {
4186ecf8 1154 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1155 return -ENODEV;
1156 }
1157
f327ebbd 1158 value = sn9c102_strtou16(buf, len, &count);
1da177e4 1159 if (!count) {
4186ecf8 1160 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1161 return -EINVAL;
1162 }
1163
1164 err = sn9c102_write_reg(cam, value, cam->sysfs.reg);
1165 if (err) {
4186ecf8 1166 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1167 return -EIO;
1168 }
1169
f327ebbd 1170 DBG(2, "Written SN9C1XX reg. 0x%02X, val. 0x%02X",
a966f3e7
LR		 1171 cam->sysfs.reg, value);
1172 DBG(3, "Written bytes: %zd", count);
1da177e4 1173
4186ecf8 1174 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1175
1176 return count;
1177}
1178
1179
54bd5b66
KS		 1180static ssize_t sn9c102_show_i2c_reg(struct device* cd,
1181 struct device_attribute *attr, char* buf)
1da177e4
LT		 1182{
1183 struct sn9c102_device* cam;
1184 ssize_t count;
1185
4186ecf8 1186 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1187 return -ERESTARTSYS;
1188
22a04f10 1189 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1190 if (!cam) {
4186ecf8 1191 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1192 return -ENODEV;
1193 }
1194
1195 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
1196
a966f3e7 1197 DBG(3, "Read bytes: %zd", count);
1da177e4 1198
4186ecf8 1199 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1200
1201 return count;
1202}
1203
1204
d56410e0 1205static ssize_t
54bd5b66
KS		 1206sn9c102_store_i2c_reg(struct device* cd, struct device_attribute *attr,
1207 const char* buf, size_t len)
1da177e4
LT		 1208{
1209 struct sn9c102_device* cam;
f327ebbd 1210 u16 index;
1da177e4
LT		 1211 ssize_t count;
1212
4186ecf8 1213 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1214 return -ERESTARTSYS;
1215
22a04f10 1216 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1217 if (!cam) {
4186ecf8 1218 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1219 return -ENODEV;
1220 }
1221
f327ebbd 1222 index = sn9c102_strtou16(buf, len, &count);
1da177e4 1223 if (!count) {
4186ecf8 1224 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1225 return -EINVAL;
1226 }
1227
1228 cam->sysfs.i2c_reg = index;
1229
a966f3e7
LR		 1230 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
1231 DBG(3, "Written bytes: %zd", count);
1da177e4 1232
4186ecf8 1233 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1234
1235 return count;
1236}
1237
1238
54bd5b66
KS		 1239static ssize_t sn9c102_show_i2c_val(struct device* cd,
1240 struct device_attribute *attr, char* buf)
1da177e4
LT		 1241{
1242 struct sn9c102_device* cam;
1243 ssize_t count;
1244 int val;
1245
4186ecf8 1246 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1247 return -ERESTARTSYS;
1248
22a04f10 1249 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1250 if (!cam) {
4186ecf8 1251 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1252 return -ENODEV;
1253 }
1254
2ffab02f 1255 if (!(cam->sensor.sysfs_ops & SN9C102_I2C_READ)) {
4186ecf8 1256 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1257 return -ENOSYS;
1258 }
1259
1260 if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
4186ecf8 1261 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1262 return -EIO;
1263 }
1264
1265 count = sprintf(buf, "%d\n", val);
1266
f423b9a8 1267 DBG(3, "Read bytes: %zd, value: %d", count, val);
1da177e4 1268
4186ecf8 1269 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1270
1271 return count;
d56410e0 1272}
1da177e4
LT		 1273
1274
1275static ssize_t
54bd5b66
KS		 1276sn9c102_store_i2c_val(struct device* cd, struct device_attribute *attr,
1277 const char* buf, size_t len)
1da177e4
LT		 1278{
1279 struct sn9c102_device* cam;
f327ebbd 1280 u16 value;
1da177e4
LT		 1281 ssize_t count;
1282 int err;
1283
4186ecf8 1284 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1285 return -ERESTARTSYS;
1286
22a04f10 1287 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1288 if (!cam) {
4186ecf8 1289 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1290 return -ENODEV;
1291 }
1292
2ffab02f 1293 if (!(cam->sensor.sysfs_ops & SN9C102_I2C_WRITE)) {
4186ecf8 1294 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1295 return -ENOSYS;
1296 }
1297
f327ebbd 1298 value = sn9c102_strtou16(buf, len, &count);
1da177e4 1299 if (!count) {
4186ecf8 1300 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1301 return -EINVAL;
1302 }
1303
1304 err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value);
1305 if (err) {
4186ecf8 1306 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1307 return -EIO;
1308 }
1309
1310 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
a966f3e7
LR		 1311 cam->sysfs.i2c_reg, value);
1312 DBG(3, "Written bytes: %zd", count);
1da177e4 1313
4186ecf8 1314 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1315
1316 return count;
1317}
1318
1319
1320static ssize_t
54bd5b66
KS		 1321sn9c102_store_green(struct device* cd, struct device_attribute *attr,
1322 const char* buf, size_t len)
1da177e4
LT		 1323{
1324 struct sn9c102_device* cam;
1325 enum sn9c102_bridge bridge;
1326 ssize_t res = 0;
f327ebbd 1327 u16 value;
1da177e4
LT		 1328 ssize_t count;
1329
4186ecf8 1330 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1da177e4
LT		 1331 return -ERESTARTSYS;
1332
22a04f10 1333 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4 1334 if (!cam) {
4186ecf8 1335 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4
LT		 1336 return -ENODEV;
1337 }
1338
1339 bridge = cam->bridge;
1340
4186ecf8 1341 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4 1342
f327ebbd 1343 value = sn9c102_strtou16(buf, len, &count);
1da177e4
LT		 1344 if (!count)
1345 return -EINVAL;
1346
1347 switch (bridge) {
1348 case BRIDGE_SN9C101:
1349 case BRIDGE_SN9C102:
1350 if (value > 0x0f)
1351 return -EINVAL;
54bd5b66
KS		 1352 if ((res = sn9c102_store_reg(cd, attr, "0x11", 4)) >= 0)
1353 res = sn9c102_store_val(cd, attr, buf, len);
1da177e4
LT		 1354 break;
1355 case BRIDGE_SN9C103:
f327ebbd
LR		 1356 case BRIDGE_SN9C105:
1357 case BRIDGE_SN9C120:
1da177e4
LT		 1358 if (value > 0x7f)
1359 return -EINVAL;
54bd5b66
KS		 1360 if ((res = sn9c102_store_reg(cd, attr, "0x07", 4)) >= 0)
1361 res = sn9c102_store_val(cd, attr, buf, len);
1da177e4
LT		 1362 break;
1363 }
1364
1365 return res;
1366}
1367
1368
1369static ssize_t
54bd5b66
KS		 1370sn9c102_store_blue(struct device* cd, struct device_attribute *attr,
1371 const char* buf, size_t len)
1da177e4
LT		 1372{
1373 ssize_t res = 0;
f327ebbd 1374 u16 value;
1da177e4
LT		 1375 ssize_t count;
1376
f327ebbd 1377 value = sn9c102_strtou16(buf, len, &count);
1da177e4
LT		 1378 if (!count || value > 0x7f)
1379 return -EINVAL;
1380
54bd5b66
KS		 1381 if ((res = sn9c102_store_reg(cd, attr, "0x06", 4)) >= 0)
1382 res = sn9c102_store_val(cd, attr, buf, len);
1da177e4
LT		 1383
1384 return res;
1385}
1386
1387
1388static ssize_t
54bd5b66
KS		 1389sn9c102_store_red(struct device* cd, struct device_attribute *attr,
1390 const char* buf, size_t len)
1da177e4
LT		 1391{
1392 ssize_t res = 0;
f327ebbd 1393 u16 value;
1da177e4
LT		 1394 ssize_t count;
1395
f327ebbd 1396 value = sn9c102_strtou16(buf, len, &count);
1da177e4
LT		 1397 if (!count || value > 0x7f)
1398 return -EINVAL;
1399
54bd5b66
KS		 1400 if ((res = sn9c102_store_reg(cd, attr, "0x05", 4)) >= 0)
1401 res = sn9c102_store_val(cd, attr, buf, len);
1da177e4
LT		 1402
1403 return res;
1404}
1405
1406
54bd5b66
KS		 1407static ssize_t sn9c102_show_frame_header(struct device* cd,
1408 struct device_attribute *attr,
1409 char* buf)
1da177e4
LT		 1410{
1411 struct sn9c102_device* cam;
1412 ssize_t count;
1413
22a04f10 1414 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1da177e4
LT		 1415 if (!cam)
1416 return -ENODEV;
1417
1418 count = sizeof(cam->sysfs.frame_header);
1419 memcpy(buf, cam->sysfs.frame_header, count);
1420
a966f3e7 1421 DBG(3, "Frame header, read bytes: %zd", count);
1da177e4
LT		 1422
1423 return count;
d56410e0 1424}
1da177e4
LT		 1425
1426
54bd5b66
KS		 1427static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR, sn9c102_show_reg, sn9c102_store_reg);
1428static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, sn9c102_show_val, sn9c102_store_val);
1429static DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
1430 sn9c102_show_i2c_reg, sn9c102_store_i2c_reg);
1431static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
1432 sn9c102_show_i2c_val, sn9c102_store_i2c_val);
1433static DEVICE_ATTR(green, S_IWUGO, NULL, sn9c102_store_green);
1434static DEVICE_ATTR(blue, S_IWUGO, NULL, sn9c102_store_blue);
1435static DEVICE_ATTR(red, S_IWUGO, NULL, sn9c102_store_red);
1436static DEVICE_ATTR(frame_header, S_IRUGO, sn9c102_show_frame_header, NULL);
1da177e4
LT		 1437
1438
c12e3be0 1439static int sn9c102_create_sysfs(struct sn9c102_device* cam)
1da177e4 1440{
22a04f10 1441 struct device *dev = &(cam->v4ldev->dev);
f327ebbd 1442 int err = 0;
c12e3be0 1443
22a04f10 1444 if ((err = device_create_file(dev, &dev_attr_reg)))
f327ebbd 1445 goto err_out;
22a04f10 1446 if ((err = device_create_file(dev, &dev_attr_val)))
f327ebbd 1447 goto err_reg;
22a04f10 1448 if ((err = device_create_file(dev, &dev_attr_frame_header)))
f327ebbd 1449 goto err_val;
1da177e4 1450
2ffab02f 1451 if (cam->sensor.sysfs_ops) {
22a04f10 1452 if ((err = device_create_file(dev, &dev_attr_i2c_reg)))
f327ebbd 1453 goto err_frame_header;
22a04f10 1454 if ((err = device_create_file(dev, &dev_attr_i2c_val)))
f327ebbd 1455 goto err_i2c_reg;
c12e3be0
JG		 1456 }
1457
1458 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
22a04f10 1459 if ((err = device_create_file(dev, &dev_attr_green)))
f327ebbd
LR		 1460 goto err_i2c_val;
1461 } else {
22a04f10 1462 if ((err = device_create_file(dev, &dev_attr_blue)))
f327ebbd 1463 goto err_i2c_val;
22a04f10 1464 if ((err = device_create_file(dev, &dev_attr_red)))
f327ebbd 1465 goto err_blue;
1da177e4 1466 }
c12e3be0
JG		 1467
1468 return 0;
1469
1470err_blue:
22a04f10 1471 device_remove_file(dev, &dev_attr_blue);
c12e3be0
JG		 1472err_i2c_val:
1473 if (cam->sensor.sysfs_ops)
22a04f10 1474 device_remove_file(dev, &dev_attr_i2c_val);
c12e3be0
JG		 1475err_i2c_reg:
1476 if (cam->sensor.sysfs_ops)
22a04f10 1477 device_remove_file(dev, &dev_attr_i2c_reg);
f327ebbd 1478err_frame_header:
22a04f10 1479 device_remove_file(dev, &dev_attr_frame_header);
c12e3be0 1480err_val:
22a04f10 1481 device_remove_file(dev, &dev_attr_val);
c12e3be0 1482err_reg:
22a04f10 1483 device_remove_file(dev, &dev_attr_reg);
f327ebbd
LR		 1484err_out:
1485 return err;
1da177e4 1486}
cd6fcc55 1487#endif /* CONFIG_VIDEO_ADV_DEBUG */
1da177e4
LT		 1488
1489/*****************************************************************************/
1490
1491static int
1492sn9c102_set_pix_format(struct sn9c102_device* cam, struct v4l2_pix_format* pix)
1493{
1494 int err = 0;
1495
f327ebbd
LR		 1496 if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
1497 pix->pixelformat == V4L2_PIX_FMT_JPEG) {
1498 switch (cam->bridge) {
1499 case BRIDGE_SN9C101:
1500 case BRIDGE_SN9C102:
1501 case BRIDGE_SN9C103:
1502 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1503 0x18);
1504 break;
1505 case BRIDGE_SN9C105:
1506 case BRIDGE_SN9C120:
1507 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1508 0x18);
1509 break;
1510 }
1511 } else {
1512 switch (cam->bridge) {
1513 case BRIDGE_SN9C101:
1514 case BRIDGE_SN9C102:
1515 case BRIDGE_SN9C103:
1516 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1517 0x18);
1518 break;
1519 case BRIDGE_SN9C105:
1520 case BRIDGE_SN9C120:
1521 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1522 0x18);
1523 break;
1524 }
1525 }
1da177e4
LT		 1526
1527 return err ? -EIO : 0;
1528}
1529
1530
1531static int
1532sn9c102_set_compression(struct sn9c102_device* cam,
d56410e0 1533 struct v4l2_jpegcompression* compression)
1da177e4 1534{
f327ebbd 1535 int i, err = 0;
1da177e4 1536
f327ebbd
LR		 1537 switch (cam->bridge) {
1538 case BRIDGE_SN9C101:
1539 case BRIDGE_SN9C102:
1540 case BRIDGE_SN9C103:
f423b9a8 1541 if (compression->quality == 0)
f327ebbd
LR		 1542 err += sn9c102_write_reg(cam, cam->reg[0x17] | 0x01,
1543 0x17);
f423b9a8 1544 else if (compression->quality == 1)
f327ebbd
LR		 1545 err += sn9c102_write_reg(cam, cam->reg[0x17] & 0xfe,
1546 0x17);
1547 break;
1548 case BRIDGE_SN9C105:
1549 case BRIDGE_SN9C120:
1550 if (compression->quality == 0) {
1551 for (i = 0; i <= 63; i++) {
1552 err += sn9c102_write_reg(cam,
f423b9a8 1553 SN9C102_Y_QTABLE1[i],
f327ebbd
LR		 1554 0x100 + i);
1555 err += sn9c102_write_reg(cam,
f423b9a8 1556 SN9C102_UV_QTABLE1[i],
f327ebbd
LR		 1557 0x140 + i);
1558 }
1559 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0xbf,
1560 0x18);
1561 } else if (compression->quality == 1) {
1562 for (i = 0; i <= 63; i++) {
1563 err += sn9c102_write_reg(cam,
1564 SN9C102_Y_QTABLE1[i],
1565 0x100 + i);
1566 err += sn9c102_write_reg(cam,
1567 SN9C102_UV_QTABLE1[i],
1568 0x140 + i);
1569 }
1570 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x40,
1571 0x18);
1572 }
1573 break;
1574 }
1da177e4
LT		 1575
1576 return err ? -EIO : 0;
1577}
1578
1579
1580static int sn9c102_set_scale(struct sn9c102_device* cam, u8 scale)
1581{
1582 u8 r = 0;
1583 int err = 0;
1584
1585 if (scale == 1)
1586 r = cam->reg[0x18] & 0xcf;
1587 else if (scale == 2) {
1588 r = cam->reg[0x18] & 0xcf;
1589 r |= 0x10;
1590 } else if (scale == 4)
1591 r = cam->reg[0x18] | 0x20;
1592
1593 err += sn9c102_write_reg(cam, r, 0x18);
1594 if (err)
1595 return -EIO;
1596
a966f3e7 1597 PDBGG("Scaling factor: %u", scale);
1da177e4
LT		 1598
1599 return 0;
1600}
1601
1602
1603static int sn9c102_set_crop(struct sn9c102_device* cam, struct v4l2_rect* rect)
1604{
2ffab02f 1605 struct sn9c102_sensor* s = &cam->sensor;
1da177e4
LT		 1606 u8 h_start = (u8)(rect->left - s->cropcap.bounds.left),
1607 v_start = (u8)(rect->top - s->cropcap.bounds.top),
1608 h_size = (u8)(rect->width / 16),
1609 v_size = (u8)(rect->height / 16);
1610 int err = 0;
1611
1612 err += sn9c102_write_reg(cam, h_start, 0x12);
1613 err += sn9c102_write_reg(cam, v_start, 0x13);
1614 err += sn9c102_write_reg(cam, h_size, 0x15);
1615 err += sn9c102_write_reg(cam, v_size, 0x16);
1616 if (err)
1617 return -EIO;
1618
1619 PDBGG("h_start, v_start, h_size, v_size, ho_size, vo_size "
a966f3e7 1620 "%u %u %u %u", h_start, v_start, h_size, v_size);
1da177e4
LT		 1621
1622 return 0;
1623}
1624
1625
1626static int sn9c102_init(struct sn9c102_device* cam)
1627{
2ffab02f 1628 struct sn9c102_sensor* s = &cam->sensor;
1da177e4
LT		 1629 struct v4l2_control ctrl;
1630 struct v4l2_queryctrl *qctrl;
1631 struct v4l2_rect* rect;
52950ed4 1632 u8 i = 0;
1da177e4
LT		 1633 int err = 0;
1634
1635 if (!(cam->state & DEV_INITIALIZED)) {
3770be34
LR		 1636 mutex_init(&cam->open_mutex);
1637 init_waitqueue_head(&cam->wait_open);
1da177e4
LT		 1638 qctrl = s->qctrl;
1639 rect = &(s->cropcap.defrect);
1640 } else { /* use current values */
1641 qctrl = s->_qctrl;
1642 rect = &(s->_rect);
1643 }
1644
1645 err += sn9c102_set_scale(cam, rect->width / s->pix_format.width);
1646 err += sn9c102_set_crop(cam, rect);
1647 if (err)
1648 return err;
1649
1650 if (s->init) {
1651 err = s->init(cam);
1652 if (err) {
a966f3e7 1653 DBG(3, "Sensor initialization failed");
1da177e4
LT		 1654 return err;
1655 }
1656 }
1657
1658 if (!(cam->state & DEV_INITIALIZED))
f327ebbd
LR		 1659 if (cam->bridge == BRIDGE_SN9C101 ||
1660 cam->bridge == BRIDGE_SN9C102 ||
1661 cam->bridge == BRIDGE_SN9C103) {
f423b9a8
LR		 1662 if (s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
1663 s->pix_format.pixelformat= V4L2_PIX_FMT_SBGGR8;
f327ebbd
LR		 1664 cam->compression.quality = cam->reg[0x17] & 0x01 ?
1665 0 : 1;
1666 } else {
f423b9a8
LR		 1667 if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X)
1668 s->pix_format.pixelformat = V4L2_PIX_FMT_JPEG;
f327ebbd
LR		 1669 cam->compression.quality = cam->reg[0x18] & 0x40 ?
1670 0 : 1;
1671 err += sn9c102_set_compression(cam, &cam->compression);
1672 }
1da177e4
LT		 1673 else
1674 err += sn9c102_set_compression(cam, &cam->compression);
1675 err += sn9c102_set_pix_format(cam, &s->pix_format);
1676 if (s->set_pix_format)
1677 err += s->set_pix_format(cam, &s->pix_format);
1678 if (err)
1679 return err;
1680
f327ebbd
LR		 1681 if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
1682 s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
52950ed4 1683 DBG(3, "Compressed video format is active, quality %d",
a966f3e7 1684 cam->compression.quality);
1da177e4 1685 else
a966f3e7 1686 DBG(3, "Uncompressed video format is active");
1da177e4
LT		 1687
1688 if (s->set_crop)
1689 if ((err = s->set_crop(cam, rect))) {
a966f3e7 1690 DBG(3, "set_crop() failed");
1da177e4
LT		 1691 return err;
1692 }
1693
1694 if (s->set_ctrl) {
52950ed4
TK		 1695 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1696 if (s->qctrl[i].id != 0 &&
1da177e4
LT		 1697 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1698 ctrl.id = s->qctrl[i].id;
1699 ctrl.value = qctrl[i].default_value;
1700 err = s->set_ctrl(cam, &ctrl);
1701 if (err) {
1702 DBG(3, "Set %s control failed",
a966f3e7 1703 s->qctrl[i].name);
1da177e4
LT		 1704 return err;
1705 }
1706 DBG(3, "Image sensor supports '%s' control",
a966f3e7 1707 s->qctrl[i].name);
1da177e4
LT		 1708 }
1709 }
1710
1711 if (!(cam->state & DEV_INITIALIZED)) {
4186ecf8 1712 mutex_init(&cam->fileop_mutex);
1da177e4
LT		 1713 spin_lock_init(&cam->queue_lock);
1714 init_waitqueue_head(&cam->wait_frame);
1715 init_waitqueue_head(&cam->wait_stream);
1716 cam->nreadbuffers = 2;
1717 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
52950ed4 1718 memcpy(&(s->_rect), &(s->cropcap.defrect),
1da177e4
LT		 1719 sizeof(struct v4l2_rect));
1720 cam->state |= DEV_INITIALIZED;
1721 }
1722
a966f3e7 1723 DBG(2, "Initialization succeeded");
1da177e4
LT		 1724 return 0;
1725}
1726
3770be34 1727/*****************************************************************************/
1da177e4 1728
3770be34 1729static void sn9c102_release_resources(struct kref *kref)
1da177e4 1730{
3770be34
LR		 1731 struct sn9c102_device *cam;
1732
4186ecf8 1733 mutex_lock(&sn9c102_sysfs_lock);
1da177e4 1734
3770be34
LR		 1735 cam = container_of(kref, struct sn9c102_device, kref);
1736
c6330fb8 1737 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->num);
1da177e4
LT		 1738 video_set_drvdata(cam->v4ldev, NULL);
1739 video_unregister_device(cam->v4ldev);
3770be34
LR		 1740 usb_put_dev(cam->usbdev);
1741 kfree(cam->control_buffer);
1742 kfree(cam);
1da177e4 1743
4186ecf8 1744 mutex_unlock(&sn9c102_sysfs_lock);
1da177e4 1745
1da177e4
LT		 1746}
1747
1da177e4 1748
bec43661 1749static int sn9c102_open(struct file *filp)
1da177e4
LT		 1750{
1751 struct sn9c102_device* cam;
1752 int err = 0;
1753
1754 /*
3770be34
LR		 1755 A read_trylock() in open() is the only safe way to prevent race
1756 conditions with disconnect(), one close() and multiple (not
1757 necessarily simultaneous) attempts to open(). For example, it
1758 prevents from waiting for a second access, while the device
1759 structure is being deallocated, after a possible disconnect() and
1760 during a following close() holding the write lock: given that, after
1761 this deallocation, no access will be possible anymore, using the
1762 non-trylock version would have let open() gain the access to the
1763 device structure improperly.
1764 For this reason the lock must also not be per-device.
1da177e4 1765 */
3770be34 1766 if (!down_read_trylock(&sn9c102_dev_lock))
1da177e4
LT		 1767 return -ERESTARTSYS;
1768
c170ecf4 1769 cam = video_drvdata(filp);
1da177e4 1770
3770be34
LR		 1771 if (wait_for_completion_interruptible(&cam->probe)) {
1772 up_read(&sn9c102_dev_lock);
1773 return -ERESTARTSYS;
1774 }
1775
1776 kref_get(&cam->kref);
1777
1778 /*
1779 Make sure to isolate all the simultaneous opens.
1780 */
1781 if (mutex_lock_interruptible(&cam->open_mutex)) {
1782 kref_put(&cam->kref, sn9c102_release_resources);
1783 up_read(&sn9c102_dev_lock);
1da177e4
LT		 1784 return -ERESTARTSYS;
1785 }
1786
3770be34
LR		 1787 if (cam->state & DEV_DISCONNECTED) {
1788 DBG(1, "Device not present");
1789 err = -ENODEV;
1790 goto out;
1791 }
1792
1da177e4 1793 if (cam->users) {
3770be34 1794 DBG(2, "Device /dev/video%d is already in use",
c6330fb8 1795 cam->v4ldev->num);
f327ebbd 1796 DBG(3, "Simultaneous opens are not supported");
3770be34
LR		 1797 /*
1798 open() must follow the open flags and should block
1799 eventually while the device is in use.
1800 */
1da177e4
LT		 1801 if ((filp->f_flags & O_NONBLOCK) ||
1802 (filp->f_flags & O_NDELAY)) {
1803 err = -EWOULDBLOCK;
1804 goto out;
1805 }
3770be34
LR		 1806 DBG(2, "A blocking open() has been requested. Wait for the "
1807 "device to be released...");
1808 up_read(&sn9c102_dev_lock);
1809 /*
1810 We will not release the "open_mutex" lock, so that only one
1811 process can be in the wait queue below. This way the process
1812 will be sleeping while holding the lock, without loosing its
1813 priority after any wake_up().
1814 */
1815 err = wait_event_interruptible_exclusive(cam->wait_open,
1816 (cam->state & DEV_DISCONNECTED)
d56410e0 1817 || !cam->users);
3770be34
LR		 1818 down_read(&sn9c102_dev_lock);
1819 if (err)
1820 goto out;
1da177e4 1821 if (cam->state & DEV_DISCONNECTED) {
3770be34
LR		 1822 err = -ENODEV;
1823 goto out;
1da177e4 1824 }
1da177e4
LT		 1825 }
1826
1da177e4
LT		 1827 if (cam->state & DEV_MISCONFIGURED) {
1828 err = sn9c102_init(cam);
1829 if (err) {
1830 DBG(1, "Initialization failed again. "
a966f3e7 1831 "I will retry on next open().");
1da177e4
LT		 1832 goto out;
1833 }
1834 cam->state &= ~DEV_MISCONFIGURED;
1835 }
1836
1837 if ((err = sn9c102_start_transfer(cam)))
1838 goto out;
1839
1840 filp->private_data = cam;
1841 cam->users++;
1842 cam->io = IO_NONE;
1843 cam->stream = STREAM_OFF;
1844 cam->nbuffers = 0;
1845 cam->frame_count = 0;
1846 sn9c102_empty_framequeues(cam);
1847
c6330fb8 1848 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->num);
1da177e4
LT		 1849
1850out:
3770be34
LR		 1851 mutex_unlock(&cam->open_mutex);
1852 if (err)
1853 kref_put(&cam->kref, sn9c102_release_resources);
1854
1855 up_read(&sn9c102_dev_lock);
1da177e4
LT		 1856 return err;
1857}
1858
1859
bec43661 1860static int sn9c102_release(struct file *filp)
1da177e4 1861{
3770be34 1862 struct sn9c102_device* cam;
1da177e4 1863
3770be34 1864 down_write(&sn9c102_dev_lock);
1da177e4 1865
c170ecf4 1866 cam = video_drvdata(filp);
1da177e4 1867
3770be34 1868 sn9c102_stop_transfer(cam);
1da177e4 1869 sn9c102_release_buffers(cam);
1da177e4 1870 cam->users--;
3770be34 1871 wake_up_interruptible_nr(&cam->wait_open, 1);
1da177e4 1872
c6330fb8 1873 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->num);
1da177e4 1874
3770be34
LR		 1875 kref_put(&cam->kref, sn9c102_release_resources);
1876
1877 up_write(&sn9c102_dev_lock);
1da177e4
LT		 1878
1879 return 0;
1880}
1881
1882
1883static ssize_t
1884sn9c102_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
1885{
c170ecf4 1886 struct sn9c102_device *cam = video_drvdata(filp);
1da177e4
LT		 1887 struct sn9c102_frame_t* f, * i;
1888 unsigned long lock_flags;
2ffab02f 1889 long timeout;
1da177e4
LT		 1890 int err = 0;
1891
4186ecf8 1892 if (mutex_lock_interruptible(&cam->fileop_mutex))
1da177e4
LT		 1893 return -ERESTARTSYS;
1894
1895 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 1896 DBG(1, "Device not present");
4186ecf8 1897 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 1898 return -ENODEV;
1899 }
1900
1901 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 1902 DBG(1, "The camera is misconfigured. Close and open it "
1903 "again.");
4186ecf8 1904 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 1905 return -EIO;
1906 }
1907
1908 if (cam->io == IO_MMAP) {
1909 DBG(3, "Close and open the device again to choose "
a966f3e7 1910 "the read method");
4186ecf8 1911 mutex_unlock(&cam->fileop_mutex);
f423b9a8 1912 return -EBUSY;
1da177e4
LT		 1913 }
1914
1915 if (cam->io == IO_NONE) {
1916 if (!sn9c102_request_buffers(cam,cam->nreadbuffers, IO_READ)) {
a966f3e7 1917 DBG(1, "read() failed, not enough memory");
4186ecf8 1918 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 1919 return -ENOMEM;
1920 }
1921 cam->io = IO_READ;
1922 cam->stream = STREAM_ON;
a966f3e7
LR		 1923 }
1924
1925 if (list_empty(&cam->inqueue)) {
1926 if (!list_empty(&cam->outqueue))
1927 sn9c102_empty_framequeues(cam);
1da177e4
LT		 1928 sn9c102_queue_unusedframes(cam);
1929 }
1930
1931 if (!count) {
4186ecf8 1932 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 1933 return 0;
1934 }
1935
1936 if (list_empty(&cam->outqueue)) {
1937 if (filp->f_flags & O_NONBLOCK) {
4186ecf8 1938 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 1939 return -EAGAIN;
1940 }
f327ebbd
LR		 1941 if (!cam->module_param.frame_timeout) {
1942 err = wait_event_interruptible
1943 ( cam->wait_frame,
1944 (!list_empty(&cam->outqueue)) ||
1945 (cam->state & DEV_DISCONNECTED) ||
1946 (cam->state & DEV_MISCONFIGURED) );
1947 if (err) {
1948 mutex_unlock(&cam->fileop_mutex);
1949 return err;
1950 }
1951 } else {
f423b9a8
LR		 1952 timeout = wait_event_interruptible_timeout
1953 ( cam->wait_frame,
1954 (!list_empty(&cam->outqueue)) ||
1955 (cam->state & DEV_DISCONNECTED) ||
1956 (cam->state & DEV_MISCONFIGURED),
1957 cam->module_param.frame_timeout *
1958 1000 * msecs_to_jiffies(1) );
1959 if (timeout < 0) {
1960 mutex_unlock(&cam->fileop_mutex);
1961 return timeout;
f327ebbd
LR		 1962 } else if (timeout == 0 &&
1963 !(cam->state & DEV_DISCONNECTED)) {
1964 DBG(1, "Video frame timeout elapsed");
1965 mutex_unlock(&cam->fileop_mutex);
1966 return -EIO;
1967 }
1da177e4
LT		 1968 }
1969 if (cam->state & DEV_DISCONNECTED) {
4186ecf8 1970 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 1971 return -ENODEV;
1972 }
f327ebbd 1973 if (cam->state & DEV_MISCONFIGURED) {
4186ecf8 1974 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 1975 return -EIO;
1976 }
1977 }
1978
1979 f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame);
1980
a966f3e7
LR		 1981 if (count > f->buf.bytesused)
1982 count = f->buf.bytesused;
1983
1984 if (copy_to_user(buf, f->bufmem, count)) {
1985 err = -EFAULT;
1986 goto exit;
1987 }
1988 *f_pos += count;
1989
1990exit:
1da177e4
LT		 1991 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1992 list_for_each_entry(i, &cam->outqueue, frame)
1993 i->state = F_UNUSED;
1994 INIT_LIST_HEAD(&cam->outqueue);
1995 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1996
1997 sn9c102_queue_unusedframes(cam);
1998
a966f3e7
LR		 1999 PDBGG("Frame #%lu, bytes read: %zu",
2000 (unsigned long)f->buf.index, count);
1da177e4 2001
4186ecf8 2002 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2003
2004 return count;
2005}
2006
2007
2008static unsigned int sn9c102_poll(struct file *filp, poll_table *wait)
2009{
c170ecf4 2010 struct sn9c102_device *cam = video_drvdata(filp);
a966f3e7
LR		 2011 struct sn9c102_frame_t* f;
2012 unsigned long lock_flags;
1da177e4
LT		 2013 unsigned int mask = 0;
2014
4186ecf8 2015 if (mutex_lock_interruptible(&cam->fileop_mutex))
1da177e4
LT		 2016 return POLLERR;
2017
2018 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 2019 DBG(1, "Device not present");
1da177e4
LT		 2020 goto error;
2021 }
2022
2023 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 2024 DBG(1, "The camera is misconfigured. Close and open it "
2025 "again.");
1da177e4
LT		 2026 goto error;
2027 }
2028
2029 if (cam->io == IO_NONE) {
2030 if (!sn9c102_request_buffers(cam, cam->nreadbuffers,
d56410e0 2031 IO_READ)) {
a966f3e7 2032 DBG(1, "poll() failed, not enough memory");
1da177e4
LT		 2033 goto error;
2034 }
2035 cam->io = IO_READ;
2036 cam->stream = STREAM_ON;
2037 }
2038
a966f3e7
LR		 2039 if (cam->io == IO_READ) {
2040 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2041 list_for_each_entry(f, &cam->outqueue, frame)
2042 f->state = F_UNUSED;
2043 INIT_LIST_HEAD(&cam->outqueue);
2044 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1da177e4 2045 sn9c102_queue_unusedframes(cam);
a966f3e7 2046 }
1da177e4
LT		 2047
2048 poll_wait(filp, &cam->wait_frame, wait);
2049
2050 if (!list_empty(&cam->outqueue))
2051 mask |= POLLIN | POLLRDNORM;
2052
4186ecf8 2053 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2054
2055 return mask;
2056
2057error:
4186ecf8 2058 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2059 return POLLERR;
2060}
2061
2062
2063static void sn9c102_vm_open(struct vm_area_struct* vma)
2064{
2065 struct sn9c102_frame_t* f = vma->vm_private_data;
2066 f->vma_use_count++;
2067}
2068
2069
2070static void sn9c102_vm_close(struct vm_area_struct* vma)
2071{
2072 /* NOTE: buffers are not freed here */
2073 struct sn9c102_frame_t* f = vma->vm_private_data;
2074 f->vma_use_count--;
2075}
2076
2077
2078static struct vm_operations_struct sn9c102_vm_ops = {
2079 .open = sn9c102_vm_open,
2080 .close = sn9c102_vm_close,
2081};
2082
2083
2084static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma)
2085{
c170ecf4 2086 struct sn9c102_device *cam = video_drvdata(filp);
1da177e4 2087 unsigned long size = vma->vm_end - vma->vm_start,
d56410e0 2088 start = vma->vm_start;
cd6fcc55 2089 void *pos;
1da177e4
LT		 2090 u32 i;
2091
4186ecf8 2092 if (mutex_lock_interruptible(&cam->fileop_mutex))
1da177e4
LT		 2093 return -ERESTARTSYS;
2094
2095 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 2096 DBG(1, "Device not present");
4186ecf8 2097 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2098 return -ENODEV;
2099 }
2100
2101 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 2102 DBG(1, "The camera is misconfigured. Close and open it "
2103 "again.");
4186ecf8 2104 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2105 return -EIO;
2106 }
2107
f423b9a8
LR		 2108 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
2109 mutex_unlock(&cam->fileop_mutex);
2110 return -EACCES;
2111 }
2112
2113 if (cam->io != IO_MMAP ||
1da177e4 2114 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
4186ecf8 2115 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2116 return -EINVAL;
2117 }
2118
2119 for (i = 0; i < cam->nbuffers; i++) {
2120 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
2121 break;
2122 }
2123 if (i == cam->nbuffers) {
4186ecf8 2124 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2125 return -EINVAL;
2126 }
2127
1da177e4 2128 vma->vm_flags |= VM_IO;
cd6fcc55 2129 vma->vm_flags |= VM_RESERVED;
1da177e4 2130
cd6fcc55 2131 pos = cam->frame[i].bufmem;
1da177e4 2132 while (size > 0) { /* size is page-aligned */
cd6fcc55 2133 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
4186ecf8 2134 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2135 return -EAGAIN;
2136 }
2137 start += PAGE_SIZE;
2138 pos += PAGE_SIZE;
2139 size -= PAGE_SIZE;
2140 }
2141
2142 vma->vm_ops = &sn9c102_vm_ops;
2143 vma->vm_private_data = &cam->frame[i];
1da177e4
LT		 2144 sn9c102_vm_open(vma);
2145
4186ecf8 2146 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 2147
2148 return 0;
2149}
2150
a966f3e7 2151/*****************************************************************************/
1da177e4 2152
a966f3e7
LR		 2153static int
2154sn9c102_vidioc_querycap(struct sn9c102_device* cam, void __user * arg)
1da177e4 2155{
a966f3e7
LR		 2156 struct v4l2_capability cap = {
2157 .driver = "sn9c102",
2158 .version = SN9C102_MODULE_VERSION_CODE,
2159 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
d56410e0 2160 V4L2_CAP_STREAMING,
a966f3e7
LR		 2161 };
2162
2163 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
2164 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
af128a10 2165 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
d56410e0 2166 sizeof(cap.bus_info));
a966f3e7
LR		 2167
2168 if (copy_to_user(arg, &cap, sizeof(cap)))
2169 return -EFAULT;
1da177e4 2170
a966f3e7
LR		 2171 return 0;
2172}
1da177e4 2173
1da177e4 2174
a966f3e7
LR		 2175static int
2176sn9c102_vidioc_enuminput(struct sn9c102_device* cam, void __user * arg)
2177{
2178 struct v4l2_input i;
1da177e4 2179
a966f3e7
LR		 2180 if (copy_from_user(&i, arg, sizeof(i)))
2181 return -EFAULT;
1da177e4 2182
a966f3e7
LR		 2183 if (i.index)
2184 return -EINVAL;
1da177e4 2185
a966f3e7 2186 memset(&i, 0, sizeof(i));
cd6fcc55 2187 strcpy(i.name, "Camera");
2ffab02f 2188 i.type = V4L2_INPUT_TYPE_CAMERA;
1da177e4 2189
a966f3e7
LR		 2190 if (copy_to_user(arg, &i, sizeof(i)))
2191 return -EFAULT;
1da177e4 2192
a966f3e7
LR		 2193 return 0;
2194}
1da177e4 2195
1da177e4 2196
a966f3e7 2197static int
2ffab02f
LR		 2198sn9c102_vidioc_g_input(struct sn9c102_device* cam, void __user * arg)
2199{
2200 int index = 0;
2201
2202 if (copy_to_user(arg, &index, sizeof(index)))
2203 return -EFAULT;
2204
2205 return 0;
2206}
2207
2208
2209static int
2210sn9c102_vidioc_s_input(struct sn9c102_device* cam, void __user * arg)
a966f3e7
LR		 2211{
2212 int index;
1da177e4 2213
a966f3e7
LR		 2214 if (copy_from_user(&index, arg, sizeof(index)))
2215 return -EFAULT;
1da177e4 2216
a966f3e7 2217 if (index != 0)
1da177e4 2218 return -EINVAL;
1da177e4 2219
a966f3e7
LR		 2220 return 0;
2221}
1da177e4 2222
1da177e4 2223
a966f3e7
LR		 2224static int
2225sn9c102_vidioc_query_ctrl(struct sn9c102_device* cam, void __user * arg)
2226{
2ffab02f 2227 struct sn9c102_sensor* s = &cam->sensor;
a966f3e7
LR		 2228 struct v4l2_queryctrl qc;
2229 u8 i;
1da177e4 2230
a966f3e7
LR		 2231 if (copy_from_user(&qc, arg, sizeof(qc)))
2232 return -EFAULT;
1da177e4 2233
a966f3e7
LR		 2234 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2235 if (qc.id && qc.id == s->qctrl[i].id) {
2236 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
2237 if (copy_to_user(arg, &qc, sizeof(qc)))
2238 return -EFAULT;
2239 return 0;
2240 }
1da177e4 2241
a966f3e7
LR		 2242 return -EINVAL;
2243}
1da177e4 2244
1da177e4 2245
a966f3e7
LR		 2246static int
2247sn9c102_vidioc_g_ctrl(struct sn9c102_device* cam, void __user * arg)
2248{
2ffab02f 2249 struct sn9c102_sensor* s = &cam->sensor;
a966f3e7
LR		 2250 struct v4l2_control ctrl;
2251 int err = 0;
2252 u8 i;
1da177e4 2253
a966f3e7
LR		 2254 if (!s->get_ctrl && !s->set_ctrl)
2255 return -EINVAL;
1da177e4 2256
a966f3e7
LR		 2257 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2258 return -EFAULT;
2259
2260 if (!s->get_ctrl) {
52950ed4 2261 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
a966f3e7
LR		 2262 if (ctrl.id && ctrl.id == s->qctrl[i].id) {
2263 ctrl.value = s->_qctrl[i].default_value;
2264 goto exit;
1da177e4 2265 }
a966f3e7
LR		 2266 return -EINVAL;
2267 } else
2268 err = s->get_ctrl(cam, &ctrl);
1da177e4 2269
a966f3e7
LR		 2270exit:
2271 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
2272 return -EFAULT;
1da177e4 2273
f327ebbd
LR		 2274 PDBGG("VIDIOC_G_CTRL: id %lu, value %lu",
2275 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2276
a966f3e7
LR		 2277 return err;
2278}
1da177e4 2279
1da177e4 2280
a966f3e7
LR		 2281static int
2282sn9c102_vidioc_s_ctrl(struct sn9c102_device* cam, void __user * arg)
2283{
2ffab02f 2284 struct sn9c102_sensor* s = &cam->sensor;
a966f3e7
LR		 2285 struct v4l2_control ctrl;
2286 u8 i;
2287 int err = 0;
1da177e4 2288
a966f3e7
LR		 2289 if (!s->set_ctrl)
2290 return -EINVAL;
1da177e4 2291
a966f3e7
LR		 2292 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2293 return -EFAULT;
1da177e4 2294
a966f3e7
LR		 2295 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2296 if (ctrl.id == s->qctrl[i].id) {
2ffab02f
LR		 2297 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
2298 return -EINVAL;
a966f3e7
LR		 2299 if (ctrl.value < s->qctrl[i].minimum ||
2300 ctrl.value > s->qctrl[i].maximum)
2301 return -ERANGE;
2302 ctrl.value -= ctrl.value % s->qctrl[i].step;
2303 break;
2304 }
1da177e4 2305
a966f3e7
LR		 2306 if ((err = s->set_ctrl(cam, &ctrl)))
2307 return err;
1da177e4 2308
a966f3e7 2309 s->_qctrl[i].default_value = ctrl.value;
1da177e4 2310
a966f3e7
LR		 2311 PDBGG("VIDIOC_S_CTRL: id %lu, value %lu",
2312 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
1da177e4 2313
a966f3e7
LR		 2314 return 0;
2315}
1da177e4 2316
1da177e4 2317
a966f3e7
LR		 2318static int
2319sn9c102_vidioc_cropcap(struct sn9c102_device* cam, void __user * arg)
2320{
2ffab02f 2321 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
1da177e4 2322
a966f3e7
LR		 2323 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2324 cc->pixelaspect.numerator = 1;
2325 cc->pixelaspect.denominator = 1;
1da177e4 2326
a966f3e7
LR		 2327 if (copy_to_user(arg, cc, sizeof(*cc)))
2328 return -EFAULT;
1da177e4 2329
a966f3e7
LR		 2330 return 0;
2331}
1da177e4 2332
1da177e4 2333
a966f3e7
LR		 2334static int
2335sn9c102_vidioc_g_crop(struct sn9c102_device* cam, void __user * arg)
2336{
2ffab02f 2337 struct sn9c102_sensor* s = &cam->sensor;
a966f3e7
LR		 2338 struct v4l2_crop crop = {
2339 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2340 };
1da177e4 2341
a966f3e7 2342 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1da177e4 2343
a966f3e7
LR		 2344 if (copy_to_user(arg, &crop, sizeof(crop)))
2345 return -EFAULT;
1da177e4 2346
a966f3e7
LR		 2347 return 0;
2348}
1da177e4 2349
1da177e4 2350
a966f3e7
LR		 2351static int
2352sn9c102_vidioc_s_crop(struct sn9c102_device* cam, void __user * arg)
2353{
2ffab02f 2354 struct sn9c102_sensor* s = &cam->sensor;
a966f3e7
LR		 2355 struct v4l2_crop crop;
2356 struct v4l2_rect* rect;
2357 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2358 struct v4l2_pix_format* pix_format = &(s->pix_format);
2359 u8 scale;
2360 const enum sn9c102_stream_state stream = cam->stream;
2361 const u32 nbuffers = cam->nbuffers;
2362 u32 i;
2363 int err = 0;
1da177e4 2364
a966f3e7
LR		 2365 if (copy_from_user(&crop, arg, sizeof(crop)))
2366 return -EFAULT;
1da177e4 2367
a966f3e7 2368 rect = &(crop.c);
1da177e4 2369
a966f3e7
LR		 2370 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2371 return -EINVAL;
1da177e4 2372
a966f3e7
LR		 2373 if (cam->module_param.force_munmap)
2374 for (i = 0; i < cam->nbuffers; i++)
2375 if (cam->frame[i].vma_use_count) {
2376 DBG(3, "VIDIOC_S_CROP failed. "
2377 "Unmap the buffers first.");
f423b9a8 2378 return -EBUSY;
a966f3e7 2379 }
1da177e4 2380
a966f3e7
LR		 2381 /* Preserve R,G or B origin */
2382 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
2383 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
2384
2385 if (rect->width < 16)
2386 rect->width = 16;
2387 if (rect->height < 16)
2388 rect->height = 16;
2389 if (rect->width > bounds->width)
2390 rect->width = bounds->width;
2391 if (rect->height > bounds->height)
2392 rect->height = bounds->height;
2393 if (rect->left < bounds->left)
2394 rect->left = bounds->left;
2395 if (rect->top < bounds->top)
2396 rect->top = bounds->top;
2397 if (rect->left + rect->width > bounds->left + bounds->width)
2398 rect->left = bounds->left+bounds->width - rect->width;
2399 if (rect->top + rect->height > bounds->top + bounds->height)
2400 rect->top = bounds->top+bounds->height - rect->height;
2401
2402 rect->width &= ~15L;
2403 rect->height &= ~15L;
2404
2405 if (SN9C102_PRESERVE_IMGSCALE) {
2406 /* Calculate the actual scaling factor */
2407 u32 a, b;
2408 a = rect->width * rect->height;
2409 b = pix_format->width * pix_format->height;
2410 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2411 } else
2412 scale = 1;
2413
2414 if (cam->stream == STREAM_ON)
2415 if ((err = sn9c102_stream_interrupt(cam)))
2416 return err;
1da177e4 2417
a966f3e7
LR		 2418 if (copy_to_user(arg, &crop, sizeof(crop))) {
2419 cam->stream = stream;
2420 return -EFAULT;
1da177e4
LT		 2421 }
2422
a966f3e7
LR		 2423 if (cam->module_param.force_munmap || cam->io == IO_READ)
2424 sn9c102_release_buffers(cam);
1da177e4 2425
a966f3e7
LR		 2426 err = sn9c102_set_crop(cam, rect);
2427 if (s->set_crop)
2428 err += s->set_crop(cam, rect);
2429 err += sn9c102_set_scale(cam, scale);
1da177e4 2430
a966f3e7
LR		 2431 if (err) { /* atomic, no rollback in ioctl() */
2432 cam->state |= DEV_MISCONFIGURED;
2433 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
2434 "use the camera, close and open /dev/video%d again.",
c6330fb8 2435 cam->v4ldev->num);
a966f3e7
LR		 2436 return -EIO;
2437 }
1da177e4 2438
a966f3e7
LR		 2439 s->pix_format.width = rect->width/scale;
2440 s->pix_format.height = rect->height/scale;
2441 memcpy(&(s->_rect), rect, sizeof(*rect));
1da177e4 2442
a966f3e7
LR		 2443 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2444 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2445 cam->state |= DEV_MISCONFIGURED;
2446 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
2447 "use the camera, close and open /dev/video%d again.",
c6330fb8 2448 cam->v4ldev->num);
a966f3e7 2449 return -ENOMEM;
1da177e4
LT		 2450 }
2451
a966f3e7
LR		 2452 if (cam->io == IO_READ)
2453 sn9c102_empty_framequeues(cam);
2454 else if (cam->module_param.force_munmap)
2455 sn9c102_requeue_outqueue(cam);
1da177e4 2456
a966f3e7 2457 cam->stream = stream;
1da177e4 2458
a966f3e7
LR		 2459 return 0;
2460}
1da177e4 2461
1da177e4 2462
f327ebbd
LR		 2463static int
2464sn9c102_vidioc_enum_framesizes(struct sn9c102_device* cam, void __user * arg)
2465{
2466 struct v4l2_frmsizeenum frmsize;
2467
2468 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
2469 return -EFAULT;
2470
2471 if (frmsize.index != 0)
2472 return -EINVAL;
2473
2474 switch (cam->bridge) {
2475 case BRIDGE_SN9C101:
2476 case BRIDGE_SN9C102:
2477 case BRIDGE_SN9C103:
2478 if (frmsize.pixel_format != V4L2_PIX_FMT_SN9C10X &&
2479 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2480 return -EINVAL;
2481 case BRIDGE_SN9C105:
2482 case BRIDGE_SN9C120:
2483 if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG &&
2484 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2485 return -EINVAL;
2486 }
2487
2488 frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
2489 frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
2490 frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
2491 frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
2492 frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
2493 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
2494
2495 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
2496 return -EFAULT;
2497
2498 return 0;
2499}
2500
2501
a966f3e7
LR		 2502static int
2503sn9c102_vidioc_enum_fmt(struct sn9c102_device* cam, void __user * arg)
2504{
2505 struct v4l2_fmtdesc fmtd;
1da177e4 2506
a966f3e7
LR		 2507 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
2508 return -EFAULT;
1da177e4 2509
f327ebbd
LR		 2510 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2511 return -EINVAL;
2512
a966f3e7
LR		 2513 if (fmtd.index == 0) {
2514 strcpy(fmtd.description, "bayer rgb");
2515 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
2516 } else if (fmtd.index == 1) {
f327ebbd
LR		 2517 switch (cam->bridge) {
2518 case BRIDGE_SN9C101:
2519 case BRIDGE_SN9C102:
2520 case BRIDGE_SN9C103:
f423b9a8
LR		 2521 strcpy(fmtd.description, "compressed");
2522 fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X;
f327ebbd
LR		 2523 break;
2524 case BRIDGE_SN9C105:
2525 case BRIDGE_SN9C120:
2526 strcpy(fmtd.description, "JPEG");
2527 fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
2528 break;
2529 }
a966f3e7
LR		 2530 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
2531 } else
2532 return -EINVAL;
1da177e4 2533
a966f3e7
LR		 2534 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2535 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1da177e4 2536
a966f3e7
LR		 2537 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
2538 return -EFAULT;
1da177e4 2539
a966f3e7
LR		 2540 return 0;
2541}
1da177e4 2542
1da177e4 2543
a966f3e7
LR		 2544static int
2545sn9c102_vidioc_g_fmt(struct sn9c102_device* cam, void __user * arg)
2546{
2547 struct v4l2_format format;
2ffab02f 2548 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
1da177e4 2549
a966f3e7
LR		 2550 if (copy_from_user(&format, arg, sizeof(format)))
2551 return -EFAULT;
1da177e4 2552
a966f3e7
LR		 2553 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2554 return -EINVAL;
1da177e4 2555
f423b9a8
LR		 2556 pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_JPEG) ?
2557 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2558 pfmt->bytesperline = (pfmt->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2559 pfmt->pixelformat == V4L2_PIX_FMT_JPEG)
d56410e0 2560 ? 0 : (pfmt->width * pfmt->priv) / 8;
a966f3e7
LR		 2561 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
2562 pfmt->field = V4L2_FIELD_NONE;
2563 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1da177e4 2564
a966f3e7
LR		 2565 if (copy_to_user(arg, &format, sizeof(format)))
2566 return -EFAULT;
1da177e4 2567
a966f3e7
LR		 2568 return 0;
2569}
1da177e4 2570
1da177e4 2571
a966f3e7
LR		 2572static int
2573sn9c102_vidioc_try_s_fmt(struct sn9c102_device* cam, unsigned int cmd,
d56410e0 2574 void __user * arg)
a966f3e7 2575{
2ffab02f 2576 struct sn9c102_sensor* s = &cam->sensor;
a966f3e7
LR		 2577 struct v4l2_format format;
2578 struct v4l2_pix_format* pix;
2579 struct v4l2_pix_format* pfmt = &(s->pix_format);
2580 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2581 struct v4l2_rect rect;
2582 u8 scale;
2583 const enum sn9c102_stream_state stream = cam->stream;
2584 const u32 nbuffers = cam->nbuffers;
2585 u32 i;
2586 int err = 0;
1da177e4 2587
a966f3e7
LR		 2588 if (copy_from_user(&format, arg, sizeof(format)))
2589 return -EFAULT;
1da177e4 2590
a966f3e7 2591 pix = &(format.fmt.pix);
1da177e4 2592
a966f3e7
LR		 2593 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2594 return -EINVAL;
1da177e4 2595
a966f3e7 2596 memcpy(&rect, &(s->_rect), sizeof(rect));
1da177e4 2597
a966f3e7
LR		 2598 { /* calculate the actual scaling factor */
2599 u32 a, b;
2600 a = rect.width * rect.height;
2601 b = pix->width * pix->height;
2602 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
1da177e4
LT		 2603 }
2604
a966f3e7
LR		 2605 rect.width = scale * pix->width;
2606 rect.height = scale * pix->height;
1da177e4 2607
a966f3e7
LR		 2608 if (rect.width < 16)
2609 rect.width = 16;
2610 if (rect.height < 16)
2611 rect.height = 16;
2612 if (rect.width > bounds->left + bounds->width - rect.left)
2613 rect.width = bounds->left + bounds->width - rect.left;
2614 if (rect.height > bounds->top + bounds->height - rect.top)
2615 rect.height = bounds->top + bounds->height - rect.top;
1da177e4 2616
a966f3e7
LR		 2617 rect.width &= ~15L;
2618 rect.height &= ~15L;
1da177e4 2619
a966f3e7
LR		 2620 { /* adjust the scaling factor */
2621 u32 a, b;
2622 a = rect.width * rect.height;
2623 b = pix->width * pix->height;
2624 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2625 }
2626
2627 pix->width = rect.width / scale;
2628 pix->height = rect.height / scale;
2629
f327ebbd
LR		 2630 switch (cam->bridge) {
2631 case BRIDGE_SN9C101:
2632 case BRIDGE_SN9C102:
2633 case BRIDGE_SN9C103:
f423b9a8
LR		 2634 if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X &&
2635 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2636 pix->pixelformat = pfmt->pixelformat;
f327ebbd
LR		 2637 break;
2638 case BRIDGE_SN9C105:
2639 case BRIDGE_SN9C120:
2640 if (pix->pixelformat != V4L2_PIX_FMT_JPEG &&
2641 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2642 pix->pixelformat = pfmt->pixelformat;
2643 break;
2644 }
a966f3e7 2645 pix->priv = pfmt->priv; /* bpp */
f423b9a8
LR		 2646 pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_JPEG) ?
2647 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
f327ebbd
LR		 2648 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2649 pix->pixelformat == V4L2_PIX_FMT_JPEG)
d56410e0 2650 ? 0 : (pix->width * pix->priv) / 8;
a966f3e7
LR		 2651 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2652 pix->field = V4L2_FIELD_NONE;
2653
2654 if (cmd == VIDIOC_TRY_FMT) {
2655 if (copy_to_user(arg, &format, sizeof(format)))
2656 return -EFAULT;
2657 return 0;
2658 }
1da177e4 2659
a966f3e7 2660 if (cam->module_param.force_munmap)
1da177e4
LT		 2661 for (i = 0; i < cam->nbuffers; i++)
2662 if (cam->frame[i].vma_use_count) {
a966f3e7
LR		 2663 DBG(3, "VIDIOC_S_FMT failed. Unmap the "
2664 "buffers first.");
f423b9a8 2665 return -EBUSY;
1da177e4
LT		 2666 }
2667
a966f3e7
LR		 2668 if (cam->stream == STREAM_ON)
2669 if ((err = sn9c102_stream_interrupt(cam)))
2670 return err;
1da177e4 2671
a966f3e7
LR		 2672 if (copy_to_user(arg, &format, sizeof(format))) {
2673 cam->stream = stream;
2674 return -EFAULT;
2675 }
1da177e4 2676
a966f3e7 2677 if (cam->module_param.force_munmap || cam->io == IO_READ)
1da177e4 2678 sn9c102_release_buffers(cam);
1da177e4 2679
a966f3e7
LR		 2680 err += sn9c102_set_pix_format(cam, pix);
2681 err += sn9c102_set_crop(cam, &rect);
2682 if (s->set_pix_format)
2683 err += s->set_pix_format(cam, pix);
2684 if (s->set_crop)
2685 err += s->set_crop(cam, &rect);
2686 err += sn9c102_set_scale(cam, scale);
1da177e4 2687
a966f3e7
LR		 2688 if (err) { /* atomic, no rollback in ioctl() */
2689 cam->state |= DEV_MISCONFIGURED;
2690 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2691 "use the camera, close and open /dev/video%d again.",
c6330fb8 2692 cam->v4ldev->num);
a966f3e7
LR		 2693 return -EIO;
2694 }
1da177e4 2695
a966f3e7
LR		 2696 memcpy(pfmt, pix, sizeof(*pix));
2697 memcpy(&(s->_rect), &rect, sizeof(rect));
2698
2699 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2700 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2701 cam->state |= DEV_MISCONFIGURED;
2702 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2703 "use the camera, close and open /dev/video%d again.",
c6330fb8 2704 cam->v4ldev->num);
a966f3e7 2705 return -ENOMEM;
1da177e4
LT		 2706 }
2707
a966f3e7
LR		 2708 if (cam->io == IO_READ)
2709 sn9c102_empty_framequeues(cam);
2710 else if (cam->module_param.force_munmap)
2711 sn9c102_requeue_outqueue(cam);
1da177e4 2712
a966f3e7 2713 cam->stream = stream;
1da177e4 2714
a966f3e7
LR		 2715 return 0;
2716}
2717
2718
2719static int
2720sn9c102_vidioc_g_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2721{
f327ebbd 2722 if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
a966f3e7 2723 return -EFAULT;
1da177e4 2724
a966f3e7
LR		 2725 return 0;
2726}
1da177e4 2727
1da177e4 2728
a966f3e7
LR		 2729static int
2730sn9c102_vidioc_s_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2731{
2732 struct v4l2_jpegcompression jc;
2733 const enum sn9c102_stream_state stream = cam->stream;
2734 int err = 0;
1da177e4 2735
a966f3e7
LR		 2736 if (copy_from_user(&jc, arg, sizeof(jc)))
2737 return -EFAULT;
1da177e4 2738
a966f3e7
LR		 2739 if (jc.quality != 0 && jc.quality != 1)
2740 return -EINVAL;
2741
2742 if (cam->stream == STREAM_ON)
2743 if ((err = sn9c102_stream_interrupt(cam)))
2744 return err;
2745
2746 err += sn9c102_set_compression(cam, &jc);
2747 if (err) { /* atomic, no rollback in ioctl() */
2748 cam->state |= DEV_MISCONFIGURED;
2749 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2750 "problems. To use the camera, close and open "
c6330fb8 2751 "/dev/video%d again.", cam->v4ldev->num);
a966f3e7 2752 return -EIO;
1da177e4
LT		 2753 }
2754
a966f3e7 2755 cam->compression.quality = jc.quality;
1da177e4 2756
a966f3e7 2757 cam->stream = stream;
1da177e4 2758
a966f3e7
LR		 2759 return 0;
2760}
1da177e4 2761
a966f3e7
LR		 2762
2763static int
2764sn9c102_vidioc_reqbufs(struct sn9c102_device* cam, void __user * arg)
2765{
2766 struct v4l2_requestbuffers rb;
2767 u32 i;
2768 int err;
2769
2770 if (copy_from_user(&rb, arg, sizeof(rb)))
2771 return -EFAULT;
2772
2773 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2774 rb.memory != V4L2_MEMORY_MMAP)
2775 return -EINVAL;
2776
2777 if (cam->io == IO_READ) {
2778 DBG(3, "Close and open the device again to choose the mmap "
2779 "I/O method");
f423b9a8 2780 return -EBUSY;
a966f3e7
LR		 2781 }
2782
2783 for (i = 0; i < cam->nbuffers; i++)
2784 if (cam->frame[i].vma_use_count) {
2785 DBG(3, "VIDIOC_REQBUFS failed. Previous buffers are "
2786 "still mapped.");
f423b9a8 2787 return -EBUSY;
a966f3e7 2788 }
1da177e4 2789
a966f3e7
LR		 2790 if (cam->stream == STREAM_ON)
2791 if ((err = sn9c102_stream_interrupt(cam)))
2792 return err;
1da177e4 2793
a966f3e7 2794 sn9c102_empty_framequeues(cam);
1da177e4 2795
a966f3e7
LR		 2796 sn9c102_release_buffers(cam);
2797 if (rb.count)
2798 rb.count = sn9c102_request_buffers(cam, rb.count, IO_MMAP);
1da177e4 2799
a966f3e7
LR		 2800 if (copy_to_user(arg, &rb, sizeof(rb))) {
2801 sn9c102_release_buffers(cam);
2802 cam->io = IO_NONE;
2803 return -EFAULT;
1da177e4
LT		 2804 }
2805
a966f3e7 2806 cam->io = rb.count ? IO_MMAP : IO_NONE;
1da177e4 2807
a966f3e7
LR		 2808 return 0;
2809}
1da177e4 2810
1da177e4 2811
a966f3e7
LR		 2812static int
2813sn9c102_vidioc_querybuf(struct sn9c102_device* cam, void __user * arg)
2814{
2815 struct v4l2_buffer b;
1da177e4 2816
a966f3e7
LR		 2817 if (copy_from_user(&b, arg, sizeof(b)))
2818 return -EFAULT;
1da177e4 2819
a966f3e7
LR		 2820 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2821 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2822 return -EINVAL;
1da177e4 2823
a966f3e7 2824 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
1da177e4 2825
a966f3e7
LR		 2826 if (cam->frame[b.index].vma_use_count)
2827 b.flags |= V4L2_BUF_FLAG_MAPPED;
1da177e4 2828
a966f3e7
LR		 2829 if (cam->frame[b.index].state == F_DONE)
2830 b.flags |= V4L2_BUF_FLAG_DONE;
2831 else if (cam->frame[b.index].state != F_UNUSED)
2832 b.flags |= V4L2_BUF_FLAG_QUEUED;
1da177e4 2833
a966f3e7
LR		 2834 if (copy_to_user(arg, &b, sizeof(b)))
2835 return -EFAULT;
1da177e4 2836
a966f3e7
LR		 2837 return 0;
2838}
1da177e4 2839
1da177e4 2840
a966f3e7
LR		 2841static int
2842sn9c102_vidioc_qbuf(struct sn9c102_device* cam, void __user * arg)
2843{
2844 struct v4l2_buffer b;
2845 unsigned long lock_flags;
1da177e4 2846
a966f3e7
LR		 2847 if (copy_from_user(&b, arg, sizeof(b)))
2848 return -EFAULT;
1da177e4 2849
a966f3e7
LR		 2850 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2851 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2852 return -EINVAL;
1da177e4 2853
a966f3e7
LR		 2854 if (cam->frame[b.index].state != F_UNUSED)
2855 return -EINVAL;
1da177e4 2856
a966f3e7 2857 cam->frame[b.index].state = F_QUEUED;
1da177e4 2858
a966f3e7
LR		 2859 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2860 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2861 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1da177e4 2862
a966f3e7 2863 PDBGG("Frame #%lu queued", (unsigned long)b.index);
1da177e4 2864
a966f3e7
LR		 2865 return 0;
2866}
1da177e4 2867
1da177e4 2868
a966f3e7
LR		 2869static int
2870sn9c102_vidioc_dqbuf(struct sn9c102_device* cam, struct file* filp,
d56410e0 2871 void __user * arg)
a966f3e7
LR		 2872{
2873 struct v4l2_buffer b;
2874 struct sn9c102_frame_t *f;
2875 unsigned long lock_flags;
2ffab02f 2876 long timeout;
f327ebbd 2877 int err = 0;
1da177e4 2878
a966f3e7
LR		 2879 if (copy_from_user(&b, arg, sizeof(b)))
2880 return -EFAULT;
1da177e4 2881
a966f3e7
LR		 2882 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2883 return -EINVAL;
2884
2885 if (list_empty(&cam->outqueue)) {
2886 if (cam->stream == STREAM_OFF)
2887 return -EINVAL;
2888 if (filp->f_flags & O_NONBLOCK)
2889 return -EAGAIN;
f327ebbd
LR		 2890 if (!cam->module_param.frame_timeout) {
2891 err = wait_event_interruptible
2892 ( cam->wait_frame,
2893 (!list_empty(&cam->outqueue)) ||
2894 (cam->state & DEV_DISCONNECTED) ||
2895 (cam->state & DEV_MISCONFIGURED) );
2896 if (err)
2897 return err;
2898 } else {
f423b9a8
LR		 2899 timeout = wait_event_interruptible_timeout
2900 ( cam->wait_frame,
2901 (!list_empty(&cam->outqueue)) ||
2902 (cam->state & DEV_DISCONNECTED) ||
2903 (cam->state & DEV_MISCONFIGURED),
2904 cam->module_param.frame_timeout *
2905 1000 * msecs_to_jiffies(1) );
2906 if (timeout < 0)
2907 return timeout;
f327ebbd
LR		 2908 else if (timeout == 0 &&
2909 !(cam->state & DEV_DISCONNECTED)) {
2910 DBG(1, "Video frame timeout elapsed");
2911 return -EIO;
2912 }
2913 }
a966f3e7
LR		 2914 if (cam->state & DEV_DISCONNECTED)
2915 return -ENODEV;
f327ebbd 2916 if (cam->state & DEV_MISCONFIGURED)
a966f3e7 2917 return -EIO;
1da177e4
LT		 2918 }
2919
a966f3e7
LR		 2920 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2921 f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, frame);
2922 list_del(cam->outqueue.next);
2923 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1da177e4 2924
a966f3e7 2925 f->state = F_UNUSED;
1da177e4 2926
a966f3e7
LR		 2927 memcpy(&b, &f->buf, sizeof(b));
2928 if (f->vma_use_count)
2929 b.flags |= V4L2_BUF_FLAG_MAPPED;
2930
2931 if (copy_to_user(arg, &b, sizeof(b)))
2932 return -EFAULT;
2933
2934 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2935
2936 return 0;
2937}
2938
2939
2940static int
2941sn9c102_vidioc_streamon(struct sn9c102_device* cam, void __user * arg)
2942{
2943 int type;
2944
2945 if (copy_from_user(&type, arg, sizeof(type)))
2946 return -EFAULT;
2947
2948 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2949 return -EINVAL;
2950
a966f3e7
LR		 2951 cam->stream = STREAM_ON;
2952
2953 DBG(3, "Stream on");
2954
2955 return 0;
2956}
2957
2958
2959static int
2960sn9c102_vidioc_streamoff(struct sn9c102_device* cam, void __user * arg)
2961{
2962 int type, err;
2963
2964 if (copy_from_user(&type, arg, sizeof(type)))
2965 return -EFAULT;
2966
2967 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2968 return -EINVAL;
2969
2970 if (cam->stream == STREAM_ON)
2971 if ((err = sn9c102_stream_interrupt(cam)))
2972 return err;
2973
2974 sn9c102_empty_framequeues(cam);
2975
2976 DBG(3, "Stream off");
2977
2978 return 0;
2979}
2980
2981
2982static int
2983sn9c102_vidioc_g_parm(struct sn9c102_device* cam, void __user * arg)
2984{
2985 struct v4l2_streamparm sp;
2986
2987 if (copy_from_user(&sp, arg, sizeof(sp)))
2988 return -EFAULT;
2989
2990 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2991 return -EINVAL;
2992
2993 sp.parm.capture.extendedmode = 0;
2994 sp.parm.capture.readbuffers = cam->nreadbuffers;
2995
2996 if (copy_to_user(arg, &sp, sizeof(sp)))
2997 return -EFAULT;
2998
2999 return 0;
3000}
3001
3002
3003static int
3004sn9c102_vidioc_s_parm(struct sn9c102_device* cam, void __user * arg)
3005{
3006 struct v4l2_streamparm sp;
3007
3008 if (copy_from_user(&sp, arg, sizeof(sp)))
3009 return -EFAULT;
3010
3011 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
3012 return -EINVAL;
3013
3014 sp.parm.capture.extendedmode = 0;
1da177e4 3015
a966f3e7 3016 if (sp.parm.capture.readbuffers == 0)
1da177e4
LT		 3017 sp.parm.capture.readbuffers = cam->nreadbuffers;
3018
a966f3e7
LR		 3019 if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES)
3020 sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES;
1da177e4 3021
a966f3e7
LR		 3022 if (copy_to_user(arg, &sp, sizeof(sp)))
3023 return -EFAULT;
1da177e4 3024
a966f3e7 3025 cam->nreadbuffers = sp.parm.capture.readbuffers;
1da177e4 3026
a966f3e7
LR		 3027 return 0;
3028}
1da177e4 3029
1da177e4 3030
f327ebbd
LR		 3031static int
3032sn9c102_vidioc_enumaudio(struct sn9c102_device* cam, void __user * arg)
3033{
3034 struct v4l2_audio audio;
3035
3036 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3037 return -EINVAL;
3038
3039 if (copy_from_user(&audio, arg, sizeof(audio)))
3040 return -EFAULT;
3041
3042 if (audio.index != 0)
3043 return -EINVAL;
3044
3045 strcpy(audio.name, "Microphone");
3046 audio.capability = 0;
3047 audio.mode = 0;
3048
3049 if (copy_to_user(arg, &audio, sizeof(audio)))
3050 return -EFAULT;
3051
3052 return 0;
3053}
3054
3055
3056static int
3057sn9c102_vidioc_g_audio(struct sn9c102_device* cam, void __user * arg)
3058{
3059 struct v4l2_audio audio;
3060
3061 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3062 return -EINVAL;
3063
3064 if (copy_from_user(&audio, arg, sizeof(audio)))
3065 return -EFAULT;
3066
3067 memset(&audio, 0, sizeof(audio));
3068 strcpy(audio.name, "Microphone");
3069
3070 if (copy_to_user(arg, &audio, sizeof(audio)))
3071 return -EFAULT;
3072
3073 return 0;
3074}
3075
3076
3077static int
3078sn9c102_vidioc_s_audio(struct sn9c102_device* cam, void __user * arg)
3079{
3080 struct v4l2_audio audio;
3081
3082 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3083 return -EINVAL;
3084
3085 if (copy_from_user(&audio, arg, sizeof(audio)))
3086 return -EFAULT;
3087
3088 if (audio.index != 0)
3089 return -EINVAL;
3090
3091 return 0;
3092}
3093
3094
bec43661
HV		 3095static int sn9c102_ioctl_v4l2(struct file *filp,
3096 unsigned int cmd, void __user *arg)
a966f3e7 3097{
c170ecf4 3098 struct sn9c102_device *cam = video_drvdata(filp);
1da177e4 3099
a966f3e7 3100 switch (cmd) {
1da177e4 3101
a966f3e7
LR		 3102 case VIDIOC_QUERYCAP:
3103 return sn9c102_vidioc_querycap(cam, arg);
1da177e4 3104
a966f3e7
LR		 3105 case VIDIOC_ENUMINPUT:
3106 return sn9c102_vidioc_enuminput(cam, arg);
1da177e4 3107
a966f3e7 3108 case VIDIOC_G_INPUT:
2ffab02f
LR		 3109 return sn9c102_vidioc_g_input(cam, arg);
3110
a966f3e7 3111 case VIDIOC_S_INPUT:
2ffab02f 3112 return sn9c102_vidioc_s_input(cam, arg);
1da177e4 3113
a966f3e7
LR		 3114 case VIDIOC_QUERYCTRL:
3115 return sn9c102_vidioc_query_ctrl(cam, arg);
3116
3117 case VIDIOC_G_CTRL:
3118 return sn9c102_vidioc_g_ctrl(cam, arg);
3119
a966f3e7
LR		 3120 case VIDIOC_S_CTRL:
3121 return sn9c102_vidioc_s_ctrl(cam, arg);
3122
a966f3e7
LR		 3123 case VIDIOC_CROPCAP:
3124 return sn9c102_vidioc_cropcap(cam, arg);
3125
3126 case VIDIOC_G_CROP:
3127 return sn9c102_vidioc_g_crop(cam, arg);
3128
3129 case VIDIOC_S_CROP:
3130 return sn9c102_vidioc_s_crop(cam, arg);
3131
f327ebbd
LR		 3132 case VIDIOC_ENUM_FRAMESIZES:
3133 return sn9c102_vidioc_enum_framesizes(cam, arg);
3134
a966f3e7
LR		 3135 case VIDIOC_ENUM_FMT:
3136 return sn9c102_vidioc_enum_fmt(cam, arg);
3137
3138 case VIDIOC_G_FMT:
3139 return sn9c102_vidioc_g_fmt(cam, arg);
3140
3141 case VIDIOC_TRY_FMT:
3142 case VIDIOC_S_FMT:
3143 return sn9c102_vidioc_try_s_fmt(cam, cmd, arg);
3144
3145 case VIDIOC_G_JPEGCOMP:
3146 return sn9c102_vidioc_g_jpegcomp(cam, arg);
3147
3148 case VIDIOC_S_JPEGCOMP:
3149 return sn9c102_vidioc_s_jpegcomp(cam, arg);
3150
3151 case VIDIOC_REQBUFS:
3152 return sn9c102_vidioc_reqbufs(cam, arg);
3153
3154 case VIDIOC_QUERYBUF:
3155 return sn9c102_vidioc_querybuf(cam, arg);
3156
3157 case VIDIOC_QBUF:
3158 return sn9c102_vidioc_qbuf(cam, arg);
3159
3160 case VIDIOC_DQBUF:
3161 return sn9c102_vidioc_dqbuf(cam, filp, arg);
3162
3163 case VIDIOC_STREAMON:
3164 return sn9c102_vidioc_streamon(cam, arg);
3165
3166 case VIDIOC_STREAMOFF:
3167 return sn9c102_vidioc_streamoff(cam, arg);
3168
3169 case VIDIOC_G_PARM:
3170 return sn9c102_vidioc_g_parm(cam, arg);
3171
a966f3e7
LR		 3172 case VIDIOC_S_PARM:
3173 return sn9c102_vidioc_s_parm(cam, arg);
1da177e4 3174
f327ebbd
LR		 3175 case VIDIOC_ENUMAUDIO:
3176 return sn9c102_vidioc_enumaudio(cam, arg);
3177
3178 case VIDIOC_G_AUDIO:
3179 return sn9c102_vidioc_g_audio(cam, arg);
3180
3181 case VIDIOC_S_AUDIO:
3182 return sn9c102_vidioc_s_audio(cam, arg);
3183
1da177e4
LT		 3184 case VIDIOC_G_STD:
3185 case VIDIOC_S_STD:
3186 case VIDIOC_QUERYSTD:
3187 case VIDIOC_ENUMSTD:
3188 case VIDIOC_QUERYMENU:
f327ebbd 3189 case VIDIOC_ENUM_FRAMEINTERVALS:
1da177e4
LT		 3190 return -EINVAL;
3191
3192 default:
3193 return -EINVAL;
3194
3195 }
3196}
3197
3198
bec43661 3199static int sn9c102_ioctl(struct file *filp,
d56410e0 3200 unsigned int cmd, unsigned long arg)
1da177e4 3201{
c170ecf4 3202 struct sn9c102_device *cam = video_drvdata(filp);
1da177e4
LT		 3203 int err = 0;
3204
4186ecf8 3205 if (mutex_lock_interruptible(&cam->fileop_mutex))
1da177e4
LT		 3206 return -ERESTARTSYS;
3207
3208 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 3209 DBG(1, "Device not present");
4186ecf8 3210 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 3211 return -ENODEV;
3212 }
3213
3214 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 3215 DBG(1, "The camera is misconfigured. Close and open it "
3216 "again.");
4186ecf8 3217 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 3218 return -EIO;
3219 }
3220
cd6fcc55
LR		 3221 V4LDBG(3, "sn9c102", cmd);
3222
bec43661 3223 err = sn9c102_ioctl_v4l2(filp, cmd, (void __user *)arg);
1da177e4 3224
4186ecf8 3225 mutex_unlock(&cam->fileop_mutex);
1da177e4
LT		 3226
3227 return err;
3228}
3229
a966f3e7 3230/*****************************************************************************/
1da177e4 3231
bec43661 3232static const struct v4l2_file_operations sn9c102_fops = {
a966f3e7 3233 .owner = THIS_MODULE,
480b55c2 3234 .open = sn9c102_open,
1da177e4 3235 .release = sn9c102_release,
480b55c2 3236 .ioctl = sn9c102_ioctl,
480b55c2
LR		 3237 .read = sn9c102_read,
3238 .poll = sn9c102_poll,
3239 .mmap = sn9c102_mmap,
1da177e4
LT		 3240};
3241
3242/*****************************************************************************/
3243
3244/* It exists a single interface only. We do not need to validate anything. */
3245static int
3246sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
3247{
3248 struct usb_device *udev = interface_to_usbdev(intf);
3249 struct sn9c102_device* cam;
ff699e6b 3250 static unsigned int dev_nr;
a966f3e7 3251 unsigned int i;
1da177e4
LT		 3252 int err = 0, r;
3253
cd6fcc55 3254 if (!(cam = kzalloc(sizeof(struct sn9c102_device), GFP_KERNEL)))
1da177e4 3255 return -ENOMEM;
1da177e4
LT		 3256
3257 cam->usbdev = udev;
1da177e4 3258
cd6fcc55 3259 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
f327ebbd 3260 DBG(1, "kzalloc() failed");
1da177e4
LT		 3261 err = -ENOMEM;
3262 goto fail;
3263 }
1da177e4
LT		 3264
3265 if (!(cam->v4ldev = video_device_alloc())) {
a966f3e7 3266 DBG(1, "video_device_alloc() failed");
1da177e4
LT		 3267 err = -ENOMEM;
3268 goto fail;
3269 }
3270
1da177e4 3271 r = sn9c102_read_reg(cam, 0x00);
f327ebbd 3272 if (r < 0 || (r != 0x10 && r != 0x11 && r != 0x12)) {
f423b9a8
LR		 3273 DBG(1, "Sorry, this is not a SN9C1xx-based camera "
3274 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
1da177e4
LT		 3275 err = -ENODEV;
3276 goto fail;
3277 }
3278
f327ebbd 3279 cam->bridge = id->driver_info;
1da177e4
LT		 3280 switch (cam->bridge) {
3281 case BRIDGE_SN9C101:
3282 case BRIDGE_SN9C102:
3283 DBG(2, "SN9C10[12] PC Camera Controller detected "
f423b9a8 3284 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
1da177e4
LT		 3285 break;
3286 case BRIDGE_SN9C103:
3287 DBG(2, "SN9C103 PC Camera Controller detected "
f423b9a8 3288 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
f327ebbd
LR		 3289 break;
3290 case BRIDGE_SN9C105:
3291 DBG(2, "SN9C105 PC Camera Controller detected "
f423b9a8 3292 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
f327ebbd
LR		 3293 break;
3294 case BRIDGE_SN9C120:
3295 DBG(2, "SN9C120 PC Camera Controller detected "
f423b9a8 3296 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
1da177e4
LT		 3297 break;
3298 }
3299
480b55c2 3300 for (i = 0; i < ARRAY_SIZE(sn9c102_sensor_table); i++) {
1da177e4
LT		 3301 err = sn9c102_sensor_table[i](cam);
3302 if (!err)
3303 break;
3304 }
3305
2ffab02f
LR		 3306 if (!err) {
3307 DBG(2, "%s image sensor detected", cam->sensor.name);
1da177e4 3308 DBG(3, "Support for %s maintained by %s",
2ffab02f 3309 cam->sensor.name, cam->sensor.maintainer);
1da177e4 3310 } else {
480b55c2 3311 DBG(1, "No supported image sensor detected for this bridge");
1da177e4
LT		 3312 err = -ENODEV;
3313 goto fail;
3314 }
3315
f327ebbd
LR		 3316 if (!(cam->bridge & cam->sensor.supported_bridge)) {
3317 DBG(1, "Bridge not supported");
3318 err = -ENODEV;
3319 goto fail;
3320 }
3321
1da177e4 3322 if (sn9c102_init(cam)) {
a966f3e7 3323 DBG(1, "Initialization failed. I will retry on open().");
1da177e4
LT		 3324 cam->state |= DEV_MISCONFIGURED;
3325 }
3326
f327ebbd 3327 strcpy(cam->v4ldev->name, "SN9C1xx PC Camera");
1da177e4
LT		 3328 cam->v4ldev->fops = &sn9c102_fops;
3329 cam->v4ldev->minor = video_nr[dev_nr];
3330 cam->v4ldev->release = video_device_release;
748c7f80 3331 cam->v4ldev->parent = &udev->dev;
1da177e4 3332
3770be34 3333 init_completion(&cam->probe);
1da177e4
LT		 3334
3335 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
d56410e0 3336 video_nr[dev_nr]);
1da177e4 3337 if (err) {
a966f3e7 3338 DBG(1, "V4L2 device registration failed");
1da177e4 3339 if (err == -ENFILE && video_nr[dev_nr] == -1)
a966f3e7 3340 DBG(1, "Free /dev/videoX node not found");
f327ebbd
LR		 3341 video_nr[dev_nr] = -1;
3342 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3770be34 3343 complete_all(&cam->probe);
f327ebbd 3344 goto fail;
1da177e4
LT		 3345 }
3346
c6330fb8 3347 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->num);
1da177e4 3348
ddef2dcc 3349 video_set_drvdata(cam->v4ldev, cam);
1da177e4 3350 cam->module_param.force_munmap = force_munmap[dev_nr];
2ffab02f 3351 cam->module_param.frame_timeout = frame_timeout[dev_nr];
1da177e4
LT		 3352
3353 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3354
cd6fcc55 3355#ifdef CONFIG_VIDEO_ADV_DEBUG
c12e3be0 3356 err = sn9c102_create_sysfs(cam);
f327ebbd
LR		 3357 if (!err)
3358 DBG(2, "Optional device control through 'sysfs' "
3359 "interface ready");
3360 else
3361 DBG(2, "Failed to create optional 'sysfs' interface for "
3362 "device controlling. Error #%d", err);
3363#else
3364 DBG(2, "Optional device control through 'sysfs' interface disabled");
f423b9a8
LR		 3365 DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
3366 "configuration option to enable it.");
cd6fcc55 3367#endif
1da177e4
LT		 3368
3369 usb_set_intfdata(intf, cam);
3770be34
LR		 3370 kref_init(&cam->kref);
3371 usb_get_dev(cam->usbdev);
1da177e4 3372
3770be34 3373 complete_all(&cam->probe);
1da177e4
LT		 3374
3375 return 0;
3376
3377fail:
3378 if (cam) {
3379 kfree(cam->control_buffer);
3380 if (cam->v4ldev)
3381 video_device_release(cam->v4ldev);
3382 kfree(cam);
3383 }
3384 return err;
3385}
3386
3387
3388static void sn9c102_usb_disconnect(struct usb_interface* intf)
3389{
3770be34 3390 struct sn9c102_device* cam;
1da177e4 3391
3770be34 3392 down_write(&sn9c102_dev_lock);
1da177e4 3393
3770be34 3394 cam = usb_get_intfdata(intf);
1da177e4 3395
a966f3e7 3396 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
1da177e4 3397
1da177e4
LT		 3398 if (cam->users) {
3399 DBG(2, "Device /dev/video%d is open! Deregistration and "
3770be34 3400 "memory deallocation are deferred.",
c6330fb8 3401 cam->v4ldev->num);
1da177e4
LT		 3402 cam->state |= DEV_MISCONFIGURED;
3403 sn9c102_stop_transfer(cam);
3404 cam->state |= DEV_DISCONNECTED;
3405 wake_up_interruptible(&cam->wait_frame);
2ffab02f 3406 wake_up(&cam->wait_stream);
3770be34 3407 } else
1da177e4 3408 cam->state |= DEV_DISCONNECTED;
1da177e4 3409
3770be34 3410 wake_up_interruptible_all(&cam->wait_open);
1da177e4 3411
3770be34 3412 kref_put(&cam->kref, sn9c102_release_resources);
1da177e4 3413
3770be34 3414 up_write(&sn9c102_dev_lock);
1da177e4
LT		 3415}
3416
3417
3418static struct usb_driver sn9c102_usb_driver = {
1da177e4
LT		 3419 .name = "sn9c102",
3420 .id_table = sn9c102_id_table,
3421 .probe = sn9c102_usb_probe,
3422 .disconnect = sn9c102_usb_disconnect,
3423};
3424
3425/*****************************************************************************/
3426
3427static int __init sn9c102_module_init(void)
3428{
3429 int err = 0;
3430
a966f3e7
LR		 3431 KDBG(2, SN9C102_MODULE_NAME " v" SN9C102_MODULE_VERSION);
3432 KDBG(3, SN9C102_MODULE_AUTHOR);
1da177e4
LT		 3433
3434 if ((err = usb_register(&sn9c102_usb_driver)))
a966f3e7 3435 KDBG(1, "usb_register() failed");
1da177e4
LT		 3436
3437 return err;
3438}
3439
3440
3441static void __exit sn9c102_module_exit(void)
3442{
3443 usb_deregister(&sn9c102_usb_driver);
3444}
3445
3446
3447module_init(sn9c102_module_init);
3448module_exit(sn9c102_module_exit);
kernel source for telekom puls (alcatel/mediatek)