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[PATCH] USB: cp2101 Add new device IDs
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / media / sn9c102_core.c
CommitLineData
1da177e4
LT		 1/***************************************************************************
2 * V4L2 driver for SN9C10x PC Camera Controllers *
3 * *
a966f3e7 4 * Copyright (C) 2004-2006 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>
25#include <linux/moduleparam.h>
26#include <linux/errno.h>
27#include <linux/slab.h>
28#include <linux/string.h>
29#include <linux/device.h>
30#include <linux/fs.h>
31#include <linux/delay.h>
32#include <linux/stddef.h>
33#include <linux/compiler.h>
34#include <linux/ioctl.h>
35#include <linux/poll.h>
36#include <linux/stat.h>
37#include <linux/mm.h>
38#include <linux/vmalloc.h>
39#include <linux/page-flags.h>
40#include <linux/byteorder/generic.h>
41#include <asm/page.h>
42#include <asm/uaccess.h>
43
44#include "sn9c102.h"
45
46/*****************************************************************************/
47
48MODULE_DEVICE_TABLE(usb, sn9c102_id_table);
49
50MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL);
51MODULE_DESCRIPTION(SN9C102_MODULE_NAME);
52MODULE_VERSION(SN9C102_MODULE_VERSION);
53MODULE_LICENSE(SN9C102_MODULE_LICENSE);
54
55static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1};
56module_param_array(video_nr, short, NULL, 0444);
57MODULE_PARM_DESC(video_nr,
58 "\n<-1|n[,...]> Specify V4L2 minor mode number."
59 "\n -1 = use next available (default)"
60 "\n n = use minor number n (integer >= 0)"
61 "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES)
62 " cameras this way."
63 "\nFor example:"
64 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
65 "\nthe second camera and use auto for the first"
66 "\none and for every other camera."
67 "\n");
68
69static short force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] =
70 SN9C102_FORCE_MUNMAP};
71module_param_array(force_munmap, bool, NULL, 0444);
72MODULE_PARM_DESC(force_munmap,
a966f3e7
LR		 73 "\n<0|1[,...]> Force the application to unmap previously"
74 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
75 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
76 "\nthis feature. This parameter is specific for each"
1da177e4
LT		 77 "\ndetected camera."
78 "\n 0 = do not force memory unmapping"
79 "\n 1 = force memory unmapping (save memory)"
80 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
81 "\n");
82
83#ifdef SN9C102_DEBUG
84static unsigned short debug = SN9C102_DEBUG_LEVEL;
85module_param(debug, ushort, 0644);
86MODULE_PARM_DESC(debug,
87 "\n<n> Debugging information level, from 0 to 3:"
88 "\n0 = none (use carefully)"
89 "\n1 = critical errors"
90 "\n2 = significant informations"
91 "\n3 = more verbose messages"
92 "\nLevel 3 is useful for testing only, when only "
93 "one device is used."
94 "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"."
95 "\n");
96#endif
97
98/*****************************************************************************/
99
100static sn9c102_sof_header_t sn9c102_sof_header[] = {
101 {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x00},
102 {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x01},
103};
104
a966f3e7
LR		 105static sn9c103_sof_header_t sn9c103_sof_header[] = {
106 {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x20},
107};
1da177e4
LT		 108
109static sn9c102_eof_header_t sn9c102_eof_header[] = {
110 {0x00, 0x00, 0x00, 0x00},
111 {0x40, 0x00, 0x00, 0x00},
112 {0x80, 0x00, 0x00, 0x00},
113 {0xc0, 0x00, 0x00, 0x00},
114};
115
116/*****************************************************************************/
117
118static void* rvmalloc(size_t size)
119{
120 void* mem;
121 unsigned long adr;
122
123 size = PAGE_ALIGN(size);
124
125 mem = vmalloc_32((unsigned long)size);
126 if (!mem)
127 return NULL;
128
129 memset(mem, 0, size);
130
131 adr = (unsigned long)mem;
132 while (size > 0) {
133 SetPageReserved(vmalloc_to_page((void *)adr));
134 adr += PAGE_SIZE;
135 size -= PAGE_SIZE;
136 }
137
138 return mem;
139}
140
141
142static void rvfree(void* mem, size_t size)
143{
144 unsigned long adr;
145
146 if (!mem)
147 return;
148
149 size = PAGE_ALIGN(size);
150
151 adr = (unsigned long)mem;
152 while (size > 0) {
153 ClearPageReserved(vmalloc_to_page((void *)adr));
154 adr += PAGE_SIZE;
155 size -= PAGE_SIZE;
156 }
157
158 vfree(mem);
159}
160
161
162static u32
163sn9c102_request_buffers(struct sn9c102_device* cam, u32 count,
164 enum sn9c102_io_method io)
165{
166 struct v4l2_pix_format* p = &(cam->sensor->pix_format);
167 struct v4l2_rect* r = &(cam->sensor->cropcap.bounds);
168 const size_t imagesize = cam->module_param.force_munmap ||
169 io == IO_READ ?
170 (p->width * p->height * p->priv) / 8 :
171 (r->width * r->height * p->priv) / 8;
172 void* buff = NULL;
173 u32 i;
174
175 if (count > SN9C102_MAX_FRAMES)
176 count = SN9C102_MAX_FRAMES;
177
178 cam->nbuffers = count;
179 while (cam->nbuffers > 0) {
180 if ((buff = rvmalloc(cam->nbuffers * PAGE_ALIGN(imagesize))))
181 break;
182 cam->nbuffers--;
183 }
184
185 for (i = 0; i < cam->nbuffers; i++) {
186 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
187 cam->frame[i].buf.index = i;
188 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
189 cam->frame[i].buf.length = imagesize;
190 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
191 cam->frame[i].buf.sequence = 0;
192 cam->frame[i].buf.field = V4L2_FIELD_NONE;
193 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
194 cam->frame[i].buf.flags = 0;
195 }
196
197 return cam->nbuffers;
198}
199
200
201static void sn9c102_release_buffers(struct sn9c102_device* cam)
202{
203 if (cam->nbuffers) {
204 rvfree(cam->frame[0].bufmem,
0b67ba63 205 cam->nbuffers * PAGE_ALIGN(cam->frame[0].buf.length));
1da177e4
LT		 206 cam->nbuffers = 0;
207 }
a966f3e7 208 cam->frame_current = NULL;
1da177e4
LT		 209}
210
211
212static void sn9c102_empty_framequeues(struct sn9c102_device* cam)
213{
214 u32 i;
215
216 INIT_LIST_HEAD(&cam->inqueue);
217 INIT_LIST_HEAD(&cam->outqueue);
218
219 for (i = 0; i < SN9C102_MAX_FRAMES; i++) {
220 cam->frame[i].state = F_UNUSED;
221 cam->frame[i].buf.bytesused = 0;
222 }
223}
224
225
a966f3e7
LR		 226static void sn9c102_requeue_outqueue(struct sn9c102_device* cam)
227{
228 struct sn9c102_frame_t *i;
229
230 list_for_each_entry(i, &cam->outqueue, frame) {
231 i->state = F_QUEUED;
232 list_add(&i->frame, &cam->inqueue);
233 }
234
235 INIT_LIST_HEAD(&cam->outqueue);
236}
237
238
1da177e4
LT		 239static void sn9c102_queue_unusedframes(struct sn9c102_device* cam)
240{
241 unsigned long lock_flags;
242 u32 i;
243
244 for (i = 0; i < cam->nbuffers; i++)
245 if (cam->frame[i].state == F_UNUSED) {
246 cam->frame[i].state = F_QUEUED;
247 spin_lock_irqsave(&cam->queue_lock, lock_flags);
248 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
249 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
250 }
251}
252
253/*****************************************************************************/
254
a966f3e7
LR		 255int sn9c102_write_regs(struct sn9c102_device* cam, u8* buff, u16 index)
256{
257 struct usb_device* udev = cam->usbdev;
258 int i, res;
259
260 if (index + sizeof(buff) >= ARRAY_SIZE(cam->reg))
261 return -1;
262
263 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
264 index, 0, buff, sizeof(buff),
265 SN9C102_CTRL_TIMEOUT*sizeof(buff));
266 if (res < 0) {
267 DBG(3, "Failed to write registers (index 0x%02X, error %d)",
268 index, res);
269 return -1;
270 }
271
272 for (i = 0; i < sizeof(buff); i++)
273 cam->reg[index+i] = buff[i];
274
275 return 0;
276}
277
278
1da177e4
LT		 279int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index)
280{
281 struct usb_device* udev = cam->usbdev;
282 u8* buff = cam->control_buffer;
283 int res;
284
a966f3e7
LR		 285 if (index >= ARRAY_SIZE(cam->reg))
286 return -1;
287
1da177e4
LT		 288 *buff = value;
289
290 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
291 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
292 if (res < 0) {
293 DBG(3, "Failed to write a register (value 0x%02X, index "
a966f3e7 294 "0x%02X, error %d)", value, index, res);
1da177e4
LT		 295 return -1;
296 }
297
298 cam->reg[index] = value;
299
300 return 0;
301}
302
303
304/* NOTE: reading some registers always returns 0 */
305static int sn9c102_read_reg(struct sn9c102_device* cam, u16 index)
306{
307 struct usb_device* udev = cam->usbdev;
308 u8* buff = cam->control_buffer;
309 int res;
310
311 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
312 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
313 if (res < 0)
314 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
a966f3e7 315 index, res);
1da177e4
LT		 316
317 return (res >= 0) ? (int)(*buff) : -1;
318}
319
320
321int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index)
322{
a966f3e7
LR		 323 if (index >= ARRAY_SIZE(cam->reg))
324 return -1;
1da177e4
LT		 325
326 return cam->reg[index];
327}
328
329
330static int
331sn9c102_i2c_wait(struct sn9c102_device* cam, struct sn9c102_sensor* sensor)
332{
333 int i, r;
334
335 for (i = 1; i <= 5; i++) {
336 r = sn9c102_read_reg(cam, 0x08);
337 if (r < 0)
338 return -EIO;
339 if (r & 0x04)
340 return 0;
341 if (sensor->frequency & SN9C102_I2C_400KHZ)
342 udelay(5*16);
343 else
344 udelay(16*16);
345 }
346 return -EBUSY;
347}
348
349
350static int
351sn9c102_i2c_detect_read_error(struct sn9c102_device* cam,
352 struct sn9c102_sensor* sensor)
353{
354 int r;
355 r = sn9c102_read_reg(cam, 0x08);
356 return (r < 0 || (r >= 0 && !(r & 0x08))) ? -EIO : 0;
357}
358
359
360static int
361sn9c102_i2c_detect_write_error(struct sn9c102_device* cam,
362 struct sn9c102_sensor* sensor)
363{
364 int r;
365 r = sn9c102_read_reg(cam, 0x08);
366 return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0;
367}
368
369
370int
371sn9c102_i2c_try_raw_read(struct sn9c102_device* cam,
372 struct sn9c102_sensor* sensor, u8 data0, u8 data1,
373 u8 n, u8 buffer[])
374{
375 struct usb_device* udev = cam->usbdev;
376 u8* data = cam->control_buffer;
377 int err = 0, res;
378
379 /* Write cycle */
380 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
381 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10;
382 data[1] = data0; /* I2C slave id */
383 data[2] = data1; /* address */
384 data[7] = 0x10;
385 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
386 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
387 if (res < 0)
388 err += res;
389
390 err += sn9c102_i2c_wait(cam, sensor);
391
392 /* Read cycle - n bytes */
393 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
394 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) |
395 (n << 4) | 0x02;
396 data[1] = data0;
397 data[7] = 0x10;
398 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
399 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
400 if (res < 0)
401 err += res;
402
403 err += sn9c102_i2c_wait(cam, sensor);
404
405 /* The first read byte will be placed in data[4] */
406 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
407 0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT);
408 if (res < 0)
409 err += res;
410
411 err += sn9c102_i2c_detect_read_error(cam, sensor);
412
413 PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1,
a966f3e7 414 data[4]);
1da177e4
LT		 415
416 if (err) {
a966f3e7 417 DBG(3, "I2C read failed for %s image sensor", sensor->name);
1da177e4
LT		 418 return -1;
419 }
420
421 if (buffer)
422 memcpy(buffer, data, sizeof(buffer));
423
424 return (int)data[4];
425}
426
427
428int
429sn9c102_i2c_try_raw_write(struct sn9c102_device* cam,
430 struct sn9c102_sensor* sensor, u8 n, u8 data0,
431 u8 data1, u8 data2, u8 data3, u8 data4, u8 data5)
432{
433 struct usb_device* udev = cam->usbdev;
434 u8* data = cam->control_buffer;
435 int err = 0, res;
436
437 /* Write cycle. It usually is address + value */
438 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
439 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0)
440 | ((n - 1) << 4);
441 data[1] = data0;
442 data[2] = data1;
443 data[3] = data2;
444 data[4] = data3;
445 data[5] = data4;
446 data[6] = data5;
447 data[7] = 0x14;
448 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
449 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
450 if (res < 0)
451 err += res;
452
453 err += sn9c102_i2c_wait(cam, sensor);
454 err += sn9c102_i2c_detect_write_error(cam, sensor);
455
456 if (err)
a966f3e7 457 DBG(3, "I2C write failed for %s image sensor", sensor->name);
1da177e4
LT		 458
459 PDBGG("I2C raw write: %u bytes, data0 = 0x%02X, data1 = 0x%02X, "
460 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X",
a966f3e7 461 n, data0, data1, data2, data3, data4, data5);
1da177e4
LT		 462
463 return err ? -1 : 0;
464}
465
466
467int
468sn9c102_i2c_try_read(struct sn9c102_device* cam,
469 struct sn9c102_sensor* sensor, u8 address)
470{
471 return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id,
472 address, 1, NULL);
473}
474
475
b9df978f 476int
1da177e4
LT		 477sn9c102_i2c_try_write(struct sn9c102_device* cam,
478 struct sn9c102_sensor* sensor, u8 address, u8 value)
479{
480 return sn9c102_i2c_try_raw_write(cam, sensor, 3,
481 sensor->i2c_slave_id, address,
482 value, 0, 0, 0);
483}
484
485
486int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address)
487{
488 if (!cam->sensor)
489 return -1;
490
491 return sn9c102_i2c_try_read(cam, cam->sensor, address);
492}
493
494
495int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value)
496{
497 if (!cam->sensor)
498 return -1;
499
500 return sn9c102_i2c_try_write(cam, cam->sensor, address, value);
501}
502
503/*****************************************************************************/
504
505static void*
506sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len)
507{
a966f3e7
LR		 508 size_t soflen = 0, i;
509 u8 j, n = 0;
510
511 switch (cam->bridge) {
512 case BRIDGE_SN9C101:
513 case BRIDGE_SN9C102:
514 soflen = sizeof(sn9c102_sof_header_t);
515 n = sizeof(sn9c102_sof_header) / soflen;
516 break;
517 case BRIDGE_SN9C103:
518 soflen = sizeof(sn9c103_sof_header_t);
519 n = sizeof(sn9c103_sof_header) / soflen;
520 }
1da177e4 521
a966f3e7 522 for (i = 0; (len >= soflen) && (i <= len - soflen); i++)
1da177e4 523 for (j = 0; j < n; j++)
a966f3e7
LR		 524 /* The invariable part of the header is 6 bytes long */
525 if ((cam->bridge != BRIDGE_SN9C103 &&
526 !memcmp(mem + i, sn9c102_sof_header[j], 6)) ||
527 (cam->bridge == BRIDGE_SN9C103 &&
528 !memcmp(mem + i, sn9c103_sof_header[j], 6))) {
1da177e4
LT		 529 memcpy(cam->sof_header, mem + i, soflen);
530 /* Skip the header */
531 return mem + i + soflen;
532 }
533
534 return NULL;
535}
536
537
538static void*
539sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len)
540{
541 size_t eoflen = sizeof(sn9c102_eof_header_t), i;
542 unsigned j, n = sizeof(sn9c102_eof_header) / eoflen;
543
544 if (cam->sensor->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X)
545 return NULL; /* EOF header does not exist in compressed data */
546
547 for (i = 0; (len >= eoflen) && (i <= len - eoflen); i++)
548 for (j = 0; j < n; j++)
549 if (!memcmp(mem + i, sn9c102_eof_header[j], eoflen))
550 return mem + i;
551
552 return NULL;
553}
554
555
556static void sn9c102_urb_complete(struct urb *urb, struct pt_regs* regs)
557{
558 struct sn9c102_device* cam = urb->context;
559 struct sn9c102_frame_t** f;
a966f3e7 560 size_t imagesize, soflen;
1da177e4
LT		 561 u8 i;
562 int err = 0;
563
564 if (urb->status == -ENOENT)
565 return;
566
567 f = &cam->frame_current;
568
569 if (cam->stream == STREAM_INTERRUPT) {
570 cam->stream = STREAM_OFF;
571 if ((*f))
572 (*f)->state = F_QUEUED;
a966f3e7 573 DBG(3, "Stream interrupted");
1da177e4
LT		 574 wake_up_interruptible(&cam->wait_stream);
575 }
576
577 if (cam->state & DEV_DISCONNECTED)
578 return;
579
580 if (cam->state & DEV_MISCONFIGURED) {
581 wake_up_interruptible(&cam->wait_frame);
582 return;
583 }
584
585 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
586 goto resubmit_urb;
587
588 if (!(*f))
589 (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t,
590 frame);
591
592 imagesize = (cam->sensor->pix_format.width *
593 cam->sensor->pix_format.height *
594 cam->sensor->pix_format.priv) / 8;
595
a966f3e7
LR		 596 soflen = (cam->bridge) == BRIDGE_SN9C103 ?
597 sizeof(sn9c103_sof_header_t) :
598 sizeof(sn9c102_sof_header_t);
599
1da177e4
LT		 600 for (i = 0; i < urb->number_of_packets; i++) {
601 unsigned int img, len, status;
602 void *pos, *sof, *eof;
603
604 len = urb->iso_frame_desc[i].actual_length;
605 status = urb->iso_frame_desc[i].status;
606 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
607
608 if (status) {
a966f3e7 609 DBG(3, "Error in isochronous frame");
1da177e4
LT		 610 (*f)->state = F_ERROR;
611 continue;
612 }
613
a966f3e7 614 PDBGG("Isochrnous frame: length %u, #%u i", len, i);
1da177e4
LT		 615
616redo:
617 sof = sn9c102_find_sof_header(cam, pos, len);
618 if (!sof) {
619 eof = sn9c102_find_eof_header(cam, pos, len);
620 if ((*f)->state == F_GRABBING) {
621end_of_frame:
622 img = len;
623
624 if (eof)
625 img = (eof > pos) ? eof - pos - 1 : 0;
626
627 if ((*f)->buf.bytesused+img > imagesize) {
628 u32 b = (*f)->buf.bytesused + img -
629 imagesize;
630 img = imagesize - (*f)->buf.bytesused;
631 DBG(3, "Expected EOF not found: "
a966f3e7 632 "video frame cut");
1da177e4
LT		 633 if (eof)
634 DBG(3, "Exceeded limit: +%u "
a966f3e7 635 "bytes", (unsigned)(b));
1da177e4
LT		 636 }
637
638 memcpy((*f)->bufmem + (*f)->buf.bytesused, pos,
639 img);
640
641 if ((*f)->buf.bytesused == 0)
642 do_gettimeofday(&(*f)->buf.timestamp);
643
644 (*f)->buf.bytesused += img;
645
646 if ((*f)->buf.bytesused == imagesize ||
647 (cam->sensor->pix_format.pixelformat ==
648 V4L2_PIX_FMT_SN9C10X && eof)) {
649 u32 b = (*f)->buf.bytesused;
650 (*f)->state = F_DONE;
651 (*f)->buf.sequence= ++cam->frame_count;
a966f3e7 652 spin_lock(&cam->queue_lock);
1da177e4
LT		 653 list_move_tail(&(*f)->frame,
654 &cam->outqueue);
655 if (!list_empty(&cam->inqueue))
656 (*f) = list_entry(
657 cam->inqueue.next,
658 struct sn9c102_frame_t,
659 frame );
660 else
661 (*f) = NULL;
a966f3e7 662 spin_unlock(&cam->queue_lock);
1da177e4 663 memcpy(cam->sysfs.frame_header,
a966f3e7
LR		 664 cam->sof_header, soflen);
665 DBG(3, "Video frame captured: %lu "
666 "bytes", (unsigned long)(b));
1da177e4
LT		 667
668 if (!(*f))
669 goto resubmit_urb;
670
671 } else if (eof) {
672 (*f)->state = F_ERROR;
673 DBG(3, "Not expected EOF after %lu "
674 "bytes of image data",
a966f3e7
LR		 675 (unsigned long)
676 ((*f)->buf.bytesused));
1da177e4
LT		 677 }
678
679 if (sof) /* (1) */
680 goto start_of_frame;
681
682 } else if (eof) {
a966f3e7 683 DBG(3, "EOF without SOF");
1da177e4
LT		 684 continue;
685
686 } else {
a966f3e7 687 PDBGG("Ignoring pointless isochronous frame");
1da177e4
LT		 688 continue;
689 }
690
691 } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) {
692start_of_frame:
693 (*f)->state = F_GRABBING;
694 (*f)->buf.bytesused = 0;
695 len -= (sof - pos);
696 pos = sof;
a966f3e7 697 DBG(3, "SOF detected: new video frame");
1da177e4
LT		 698 if (len)
699 goto redo;
700
701 } else if ((*f)->state == F_GRABBING) {
702 eof = sn9c102_find_eof_header(cam, pos, len);
703 if (eof && eof < sof)
704 goto end_of_frame; /* (1) */
705 else {
706 if (cam->sensor->pix_format.pixelformat ==
707 V4L2_PIX_FMT_SN9C10X) {
a966f3e7 708 eof = sof - soflen;
1da177e4
LT		 709 goto end_of_frame;
710 } else {
711 DBG(3, "SOF before expected EOF after "
712 "%lu bytes of image data",
a966f3e7
LR		 713 (unsigned long)
714 ((*f)->buf.bytesused));
1da177e4
LT		 715 goto start_of_frame;
716 }
717 }
718 }
719 }
720
721resubmit_urb:
722 urb->dev = cam->usbdev;
723 err = usb_submit_urb(urb, GFP_ATOMIC);
724 if (err < 0 && err != -EPERM) {
725 cam->state |= DEV_MISCONFIGURED;
a966f3e7 726 DBG(1, "usb_submit_urb() failed");
1da177e4
LT		 727 }
728
729 wake_up_interruptible(&cam->wait_frame);
730}
731
732
733static int sn9c102_start_transfer(struct sn9c102_device* cam)
734{
735 struct usb_device *udev = cam->usbdev;
736 struct urb* urb;
a966f3e7
LR		 737 const unsigned int sn9c102_wMaxPacketSize[] = {0, 128, 256, 384, 512,
738 680, 800, 900, 1023};
739 const unsigned int sn9c103_wMaxPacketSize[] = {0, 128, 256, 384, 512,
740 680, 800, 900, 1003};
741 const unsigned int psz = (cam->bridge == BRIDGE_SN9C103) ?
742 sn9c103_wMaxPacketSize[SN9C102_ALTERNATE_SETTING] :
743 sn9c102_wMaxPacketSize[SN9C102_ALTERNATE_SETTING];
1da177e4
LT		 744 s8 i, j;
745 int err = 0;
746
747 for (i = 0; i < SN9C102_URBS; i++) {
748 cam->transfer_buffer[i] = kmalloc(SN9C102_ISO_PACKETS * psz,
749 GFP_KERNEL);
750 if (!cam->transfer_buffer[i]) {
751 err = -ENOMEM;
a966f3e7 752 DBG(1, "Not enough memory");
1da177e4
LT		 753 goto free_buffers;
754 }
755 }
756
757 for (i = 0; i < SN9C102_URBS; i++) {
758 urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL);
759 cam->urb[i] = urb;
760 if (!urb) {
761 err = -ENOMEM;
a966f3e7 762 DBG(1, "usb_alloc_urb() failed");
1da177e4
LT		 763 goto free_urbs;
764 }
765 urb->dev = udev;
766 urb->context = cam;
767 urb->pipe = usb_rcvisocpipe(udev, 1);
768 urb->transfer_flags = URB_ISO_ASAP;
769 urb->number_of_packets = SN9C102_ISO_PACKETS;
770 urb->complete = sn9c102_urb_complete;
771 urb->transfer_buffer = cam->transfer_buffer[i];
772 urb->transfer_buffer_length = psz * SN9C102_ISO_PACKETS;
773 urb->interval = 1;
774 for (j = 0; j < SN9C102_ISO_PACKETS; j++) {
775 urb->iso_frame_desc[j].offset = psz * j;
776 urb->iso_frame_desc[j].length = psz;
777 }
778 }
779
780 /* Enable video */
781 if (!(cam->reg[0x01] & 0x04)) {
782 err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01);
783 if (err) {
784 err = -EIO;
a966f3e7 785 DBG(1, "I/O hardware error");
1da177e4
LT		 786 goto free_urbs;
787 }
788 }
789
790 err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING);
791 if (err) {
a966f3e7 792 DBG(1, "usb_set_interface() failed");
1da177e4
LT		 793 goto free_urbs;
794 }
795
796 cam->frame_current = NULL;
797
798 for (i = 0; i < SN9C102_URBS; i++) {
799 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
800 if (err) {
801 for (j = i-1; j >= 0; j--)
802 usb_kill_urb(cam->urb[j]);
a966f3e7 803 DBG(1, "usb_submit_urb() failed, error %d", err);
1da177e4
LT		 804 goto free_urbs;
805 }
806 }
807
808 return 0;
809
810free_urbs:
811 for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++)
812 usb_free_urb(cam->urb[i]);
813
814free_buffers:
815 for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++)
816 kfree(cam->transfer_buffer[i]);
817
818 return err;
819}
820
821
822static int sn9c102_stop_transfer(struct sn9c102_device* cam)
823{
824 struct usb_device *udev = cam->usbdev;
825 s8 i;
826 int err = 0;
827
828 if (cam->state & DEV_DISCONNECTED)
829 return 0;
830
831 for (i = SN9C102_URBS-1; i >= 0; i--) {
832 usb_kill_urb(cam->urb[i]);
833 usb_free_urb(cam->urb[i]);
834 kfree(cam->transfer_buffer[i]);
835 }
836
837 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
838 if (err)
a966f3e7 839 DBG(3, "usb_set_interface() failed");
1da177e4
LT		 840
841 return err;
842}
843
844
7107627b 845static int sn9c102_stream_interrupt(struct sn9c102_device* cam)
1da177e4
LT		 846{
847 int err = 0;
848
849 cam->stream = STREAM_INTERRUPT;
850 err = wait_event_timeout(cam->wait_stream,
851 (cam->stream == STREAM_OFF) ||
852 (cam->state & DEV_DISCONNECTED),
853 SN9C102_URB_TIMEOUT);
854 if (cam->state & DEV_DISCONNECTED)
855 return -ENODEV;
856 else if (err) {
857 cam->state |= DEV_MISCONFIGURED;
858 DBG(1, "The camera is misconfigured. To use it, close and "
a966f3e7 859 "open /dev/video%d again.", cam->v4ldev->minor);
1da177e4
LT		 860 return err;
861 }
862
863 return 0;
864}
865
866/*****************************************************************************/
867
868static u8 sn9c102_strtou8(const char* buff, size_t len, ssize_t* count)
869{
870 char str[5];
871 char* endp;
872 unsigned long val;
873
874 if (len < 4) {
875 strncpy(str, buff, len);
876 str[len+1] = '\0';
877 } else {
878 strncpy(str, buff, 4);
879 str[4] = '\0';
880 }
881
882 val = simple_strtoul(str, &endp, 0);
883
884 *count = 0;
885 if (val <= 0xff)
886 *count = (ssize_t)(endp - str);
887 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
888 *count += 1;
889
890 return (u8)val;
891}
892
893/*
894 NOTE 1: being inside one of the following methods implies that the v4l
895 device exists for sure (see kobjects and reference counters)
896 NOTE 2: buffers are PAGE_SIZE long
897*/
898
899static ssize_t sn9c102_show_reg(struct class_device* cd, char* buf)
900{
901 struct sn9c102_device* cam;
902 ssize_t count;
903
904 if (down_interruptible(&sn9c102_sysfs_lock))
905 return -ERESTARTSYS;
906
907 cam = video_get_drvdata(to_video_device(cd));
908 if (!cam) {
909 up(&sn9c102_sysfs_lock);
910 return -ENODEV;
911 }
912
913 count = sprintf(buf, "%u\n", cam->sysfs.reg);
914
915 up(&sn9c102_sysfs_lock);
916
917 return count;
918}
919
920
921static ssize_t
922sn9c102_store_reg(struct class_device* cd, const char* buf, size_t len)
923{
924 struct sn9c102_device* cam;
925 u8 index;
926 ssize_t count;
927
928 if (down_interruptible(&sn9c102_sysfs_lock))
929 return -ERESTARTSYS;
930
931 cam = video_get_drvdata(to_video_device(cd));
932 if (!cam) {
933 up(&sn9c102_sysfs_lock);
934 return -ENODEV;
935 }
936
937 index = sn9c102_strtou8(buf, len, &count);
938 if (index > 0x1f || !count) {
939 up(&sn9c102_sysfs_lock);
940 return -EINVAL;
941 }
942
943 cam->sysfs.reg = index;
944
a966f3e7
LR		 945 DBG(2, "Moved SN9C10X register index to 0x%02X", cam->sysfs.reg);
946 DBG(3, "Written bytes: %zd", count);
1da177e4
LT		 947
948 up(&sn9c102_sysfs_lock);
949
950 return count;
951}
952
953
954static ssize_t sn9c102_show_val(struct class_device* cd, char* buf)
955{
956 struct sn9c102_device* cam;
957 ssize_t count;
958 int val;
959
960 if (down_interruptible(&sn9c102_sysfs_lock))
961 return -ERESTARTSYS;
962
963 cam = video_get_drvdata(to_video_device(cd));
964 if (!cam) {
965 up(&sn9c102_sysfs_lock);
966 return -ENODEV;
967 }
968
969 if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) {
970 up(&sn9c102_sysfs_lock);
971 return -EIO;
972 }
973
974 count = sprintf(buf, "%d\n", val);
975
a966f3e7 976 DBG(3, "Read bytes: %zd", count);
1da177e4
LT		 977
978 up(&sn9c102_sysfs_lock);
979
980 return count;
981}
982
983
984static ssize_t
985sn9c102_store_val(struct class_device* cd, const char* buf, size_t len)
986{
987 struct sn9c102_device* cam;
988 u8 value;
989 ssize_t count;
990 int err;
991
992 if (down_interruptible(&sn9c102_sysfs_lock))
993 return -ERESTARTSYS;
994
995 cam = video_get_drvdata(to_video_device(cd));
996 if (!cam) {
997 up(&sn9c102_sysfs_lock);
998 return -ENODEV;
999 }
1000
1001 value = sn9c102_strtou8(buf, len, &count);
1002 if (!count) {
1003 up(&sn9c102_sysfs_lock);
1004 return -EINVAL;
1005 }
1006
1007 err = sn9c102_write_reg(cam, value, cam->sysfs.reg);
1008 if (err) {
1009 up(&sn9c102_sysfs_lock);
1010 return -EIO;
1011 }
1012
1013 DBG(2, "Written SN9C10X reg. 0x%02X, val. 0x%02X",
a966f3e7
LR		 1014 cam->sysfs.reg, value);
1015 DBG(3, "Written bytes: %zd", count);
1da177e4
LT		 1016
1017 up(&sn9c102_sysfs_lock);
1018
1019 return count;
1020}
1021
1022
1023static ssize_t sn9c102_show_i2c_reg(struct class_device* cd, char* buf)
1024{
1025 struct sn9c102_device* cam;
1026 ssize_t count;
1027
1028 if (down_interruptible(&sn9c102_sysfs_lock))
1029 return -ERESTARTSYS;
1030
1031 cam = video_get_drvdata(to_video_device(cd));
1032 if (!cam) {
1033 up(&sn9c102_sysfs_lock);
1034 return -ENODEV;
1035 }
1036
1037 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
1038
a966f3e7 1039 DBG(3, "Read bytes: %zd", count);
1da177e4
LT		 1040
1041 up(&sn9c102_sysfs_lock);
1042
1043 return count;
1044}
1045
1046
1047static ssize_t
1048sn9c102_store_i2c_reg(struct class_device* cd, const char* buf, size_t len)
1049{
1050 struct sn9c102_device* cam;
1051 u8 index;
1052 ssize_t count;
1053
1054 if (down_interruptible(&sn9c102_sysfs_lock))
1055 return -ERESTARTSYS;
1056
1057 cam = video_get_drvdata(to_video_device(cd));
1058 if (!cam) {
1059 up(&sn9c102_sysfs_lock);
1060 return -ENODEV;
1061 }
1062
1063 index = sn9c102_strtou8(buf, len, &count);
1064 if (!count) {
1065 up(&sn9c102_sysfs_lock);
1066 return -EINVAL;
1067 }
1068
1069 cam->sysfs.i2c_reg = index;
1070
a966f3e7
LR		 1071 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
1072 DBG(3, "Written bytes: %zd", count);
1da177e4
LT		 1073
1074 up(&sn9c102_sysfs_lock);
1075
1076 return count;
1077}
1078
1079
1080static ssize_t sn9c102_show_i2c_val(struct class_device* cd, char* buf)
1081{
1082 struct sn9c102_device* cam;
1083 ssize_t count;
1084 int val;
1085
1086 if (down_interruptible(&sn9c102_sysfs_lock))
1087 return -ERESTARTSYS;
1088
1089 cam = video_get_drvdata(to_video_device(cd));
1090 if (!cam) {
1091 up(&sn9c102_sysfs_lock);
1092 return -ENODEV;
1093 }
1094
1095 if (!(cam->sensor->sysfs_ops & SN9C102_I2C_READ)) {
1096 up(&sn9c102_sysfs_lock);
1097 return -ENOSYS;
1098 }
1099
1100 if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
1101 up(&sn9c102_sysfs_lock);
1102 return -EIO;
1103 }
1104
1105 count = sprintf(buf, "%d\n", val);
1106
a966f3e7 1107 DBG(3, "Read bytes: %zd", count);
1da177e4
LT		 1108
1109 up(&sn9c102_sysfs_lock);
1110
1111 return count;
1112}
1113
1114
1115static ssize_t
1116sn9c102_store_i2c_val(struct class_device* cd, const char* buf, size_t len)
1117{
1118 struct sn9c102_device* cam;
1119 u8 value;
1120 ssize_t count;
1121 int err;
1122
1123 if (down_interruptible(&sn9c102_sysfs_lock))
1124 return -ERESTARTSYS;
1125
1126 cam = video_get_drvdata(to_video_device(cd));
1127 if (!cam) {
1128 up(&sn9c102_sysfs_lock);
1129 return -ENODEV;
1130 }
1131
1132 if (!(cam->sensor->sysfs_ops & SN9C102_I2C_WRITE)) {
1133 up(&sn9c102_sysfs_lock);
1134 return -ENOSYS;
1135 }
1136
1137 value = sn9c102_strtou8(buf, len, &count);
1138 if (!count) {
1139 up(&sn9c102_sysfs_lock);
1140 return -EINVAL;
1141 }
1142
1143 err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value);
1144 if (err) {
1145 up(&sn9c102_sysfs_lock);
1146 return -EIO;
1147 }
1148
1149 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
a966f3e7
LR		 1150 cam->sysfs.i2c_reg, value);
1151 DBG(3, "Written bytes: %zd", count);
1da177e4
LT		 1152
1153 up(&sn9c102_sysfs_lock);
1154
1155 return count;
1156}
1157
1158
1159static ssize_t
1160sn9c102_store_green(struct class_device* cd, const char* buf, size_t len)
1161{
1162 struct sn9c102_device* cam;
1163 enum sn9c102_bridge bridge;
1164 ssize_t res = 0;
1165 u8 value;
1166 ssize_t count;
1167
1168 if (down_interruptible(&sn9c102_sysfs_lock))
1169 return -ERESTARTSYS;
1170
1171 cam = video_get_drvdata(to_video_device(cd));
1172 if (!cam) {
1173 up(&sn9c102_sysfs_lock);
1174 return -ENODEV;
1175 }
1176
1177 bridge = cam->bridge;
1178
1179 up(&sn9c102_sysfs_lock);
1180
1181 value = sn9c102_strtou8(buf, len, &count);
1182 if (!count)
1183 return -EINVAL;
1184
1185 switch (bridge) {
1186 case BRIDGE_SN9C101:
1187 case BRIDGE_SN9C102:
1188 if (value > 0x0f)
1189 return -EINVAL;
1190 if ((res = sn9c102_store_reg(cd, "0x11", 4)) >= 0)
1191 res = sn9c102_store_val(cd, buf, len);
1192 break;
1193 case BRIDGE_SN9C103:
1194 if (value > 0x7f)
1195 return -EINVAL;
1196 if ((res = sn9c102_store_reg(cd, "0x04", 4)) >= 0)
1197 res = sn9c102_store_val(cd, buf, len);
1198 break;
1199 }
1200
1201 return res;
1202}
1203
1204
1205static ssize_t
1206sn9c102_store_blue(struct class_device* cd, const char* buf, size_t len)
1207{
1208 ssize_t res = 0;
1209 u8 value;
1210 ssize_t count;
1211
1212 value = sn9c102_strtou8(buf, len, &count);
1213 if (!count || value > 0x7f)
1214 return -EINVAL;
1215
1216 if ((res = sn9c102_store_reg(cd, "0x06", 4)) >= 0)
1217 res = sn9c102_store_val(cd, buf, len);
1218
1219 return res;
1220}
1221
1222
1223static ssize_t
1224sn9c102_store_red(struct class_device* cd, const char* buf, size_t len)
1225{
1226 ssize_t res = 0;
1227 u8 value;
1228 ssize_t count;
1229
1230 value = sn9c102_strtou8(buf, len, &count);
1231 if (!count || value > 0x7f)
1232 return -EINVAL;
1233
1234 if ((res = sn9c102_store_reg(cd, "0x05", 4)) >= 0)
1235 res = sn9c102_store_val(cd, buf, len);
1236
1237 return res;
1238}
1239
1240
1241static ssize_t sn9c102_show_frame_header(struct class_device* cd, char* buf)
1242{
1243 struct sn9c102_device* cam;
1244 ssize_t count;
1245
1246 cam = video_get_drvdata(to_video_device(cd));
1247 if (!cam)
1248 return -ENODEV;
1249
1250 count = sizeof(cam->sysfs.frame_header);
1251 memcpy(buf, cam->sysfs.frame_header, count);
1252
a966f3e7 1253 DBG(3, "Frame header, read bytes: %zd", count);
1da177e4
LT		 1254
1255 return count;
1256}
1257
1258
1259static CLASS_DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
1260 sn9c102_show_reg, sn9c102_store_reg);
1261static CLASS_DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
1262 sn9c102_show_val, sn9c102_store_val);
1263static CLASS_DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
1264 sn9c102_show_i2c_reg, sn9c102_store_i2c_reg);
1265static CLASS_DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
1266 sn9c102_show_i2c_val, sn9c102_store_i2c_val);
1267static CLASS_DEVICE_ATTR(green, S_IWUGO, NULL, sn9c102_store_green);
1268static CLASS_DEVICE_ATTR(blue, S_IWUGO, NULL, sn9c102_store_blue);
1269static CLASS_DEVICE_ATTR(red, S_IWUGO, NULL, sn9c102_store_red);
1270static CLASS_DEVICE_ATTR(frame_header, S_IRUGO,
1271 sn9c102_show_frame_header, NULL);
1272
1273
1274static void sn9c102_create_sysfs(struct sn9c102_device* cam)
1275{
1276 struct video_device *v4ldev = cam->v4ldev;
1277
1278 video_device_create_file(v4ldev, &class_device_attr_reg);
1279 video_device_create_file(v4ldev, &class_device_attr_val);
1280 video_device_create_file(v4ldev, &class_device_attr_frame_header);
1281 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
1282 video_device_create_file(v4ldev, &class_device_attr_green);
1283 else if (cam->bridge == BRIDGE_SN9C103) {
1284 video_device_create_file(v4ldev, &class_device_attr_blue);
1285 video_device_create_file(v4ldev, &class_device_attr_red);
1286 }
a966f3e7 1287 if (cam->sensor && cam->sensor->sysfs_ops) {
1da177e4
LT		 1288 video_device_create_file(v4ldev, &class_device_attr_i2c_reg);
1289 video_device_create_file(v4ldev, &class_device_attr_i2c_val);
1290 }
1291}
1292
1293/*****************************************************************************/
1294
1295static int
1296sn9c102_set_pix_format(struct sn9c102_device* cam, struct v4l2_pix_format* pix)
1297{
1298 int err = 0;
1299
1300 if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
1301 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80, 0x18);
1302 else
1303 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f, 0x18);
1304
1305 return err ? -EIO : 0;
1306}
1307
1308
1309static int
1310sn9c102_set_compression(struct sn9c102_device* cam,
1311 struct v4l2_jpegcompression* compression)
1312{
1313 int err = 0;
1314
1315 if (compression->quality == 0)
1316 err += sn9c102_write_reg(cam, cam->reg[0x17] | 0x01, 0x17);
1317 else if (compression->quality == 1)
1318 err += sn9c102_write_reg(cam, cam->reg[0x17] & 0xfe, 0x17);
1319
1320 return err ? -EIO : 0;
1321}
1322
1323
1324static int sn9c102_set_scale(struct sn9c102_device* cam, u8 scale)
1325{
1326 u8 r = 0;
1327 int err = 0;
1328
1329 if (scale == 1)
1330 r = cam->reg[0x18] & 0xcf;
1331 else if (scale == 2) {
1332 r = cam->reg[0x18] & 0xcf;
1333 r |= 0x10;
1334 } else if (scale == 4)
1335 r = cam->reg[0x18] | 0x20;
1336
1337 err += sn9c102_write_reg(cam, r, 0x18);
1338 if (err)
1339 return -EIO;
1340
a966f3e7 1341 PDBGG("Scaling factor: %u", scale);
1da177e4
LT		 1342
1343 return 0;
1344}
1345
1346
1347static int sn9c102_set_crop(struct sn9c102_device* cam, struct v4l2_rect* rect)
1348{
1349 struct sn9c102_sensor* s = cam->sensor;
1350 u8 h_start = (u8)(rect->left - s->cropcap.bounds.left),
1351 v_start = (u8)(rect->top - s->cropcap.bounds.top),
1352 h_size = (u8)(rect->width / 16),
1353 v_size = (u8)(rect->height / 16);
1354 int err = 0;
1355
1356 err += sn9c102_write_reg(cam, h_start, 0x12);
1357 err += sn9c102_write_reg(cam, v_start, 0x13);
1358 err += sn9c102_write_reg(cam, h_size, 0x15);
1359 err += sn9c102_write_reg(cam, v_size, 0x16);
1360 if (err)
1361 return -EIO;
1362
1363 PDBGG("h_start, v_start, h_size, v_size, ho_size, vo_size "
a966f3e7 1364 "%u %u %u %u", h_start, v_start, h_size, v_size);
1da177e4
LT		 1365
1366 return 0;
1367}
1368
1369
1370static int sn9c102_init(struct sn9c102_device* cam)
1371{
1372 struct sn9c102_sensor* s = cam->sensor;
1373 struct v4l2_control ctrl;
1374 struct v4l2_queryctrl *qctrl;
1375 struct v4l2_rect* rect;
52950ed4 1376 u8 i = 0;
1da177e4
LT		 1377 int err = 0;
1378
1379 if (!(cam->state & DEV_INITIALIZED)) {
1380 init_waitqueue_head(&cam->open);
1381 qctrl = s->qctrl;
1382 rect = &(s->cropcap.defrect);
1383 } else { /* use current values */
1384 qctrl = s->_qctrl;
1385 rect = &(s->_rect);
1386 }
1387
1388 err += sn9c102_set_scale(cam, rect->width / s->pix_format.width);
1389 err += sn9c102_set_crop(cam, rect);
1390 if (err)
1391 return err;
1392
1393 if (s->init) {
1394 err = s->init(cam);
1395 if (err) {
a966f3e7 1396 DBG(3, "Sensor initialization failed");
1da177e4
LT		 1397 return err;
1398 }
1399 }
1400
1401 if (!(cam->state & DEV_INITIALIZED))
1402 cam->compression.quality = cam->reg[0x17] & 0x01 ? 0 : 1;
1403 else
1404 err += sn9c102_set_compression(cam, &cam->compression);
1405 err += sn9c102_set_pix_format(cam, &s->pix_format);
1406 if (s->set_pix_format)
1407 err += s->set_pix_format(cam, &s->pix_format);
1408 if (err)
1409 return err;
1410
1411 if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X)
52950ed4 1412 DBG(3, "Compressed video format is active, quality %d",
a966f3e7 1413 cam->compression.quality);
1da177e4 1414 else
a966f3e7 1415 DBG(3, "Uncompressed video format is active");
1da177e4
LT		 1416
1417 if (s->set_crop)
1418 if ((err = s->set_crop(cam, rect))) {
a966f3e7 1419 DBG(3, "set_crop() failed");
1da177e4
LT		 1420 return err;
1421 }
1422
1423 if (s->set_ctrl) {
52950ed4
TK		 1424 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1425 if (s->qctrl[i].id != 0 &&
1da177e4
LT		 1426 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1427 ctrl.id = s->qctrl[i].id;
1428 ctrl.value = qctrl[i].default_value;
1429 err = s->set_ctrl(cam, &ctrl);
1430 if (err) {
1431 DBG(3, "Set %s control failed",
a966f3e7 1432 s->qctrl[i].name);
1da177e4
LT		 1433 return err;
1434 }
1435 DBG(3, "Image sensor supports '%s' control",
a966f3e7 1436 s->qctrl[i].name);
1da177e4
LT		 1437 }
1438 }
1439
1440 if (!(cam->state & DEV_INITIALIZED)) {
1441 init_MUTEX(&cam->fileop_sem);
1442 spin_lock_init(&cam->queue_lock);
1443 init_waitqueue_head(&cam->wait_frame);
1444 init_waitqueue_head(&cam->wait_stream);
1445 cam->nreadbuffers = 2;
1446 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
52950ed4 1447 memcpy(&(s->_rect), &(s->cropcap.defrect),
1da177e4
LT		 1448 sizeof(struct v4l2_rect));
1449 cam->state |= DEV_INITIALIZED;
1450 }
1451
a966f3e7 1452 DBG(2, "Initialization succeeded");
1da177e4
LT		 1453 return 0;
1454}
1455
1456
1457static void sn9c102_release_resources(struct sn9c102_device* cam)
1458{
1459 down(&sn9c102_sysfs_lock);
1460
a966f3e7 1461 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
1da177e4
LT		 1462 video_set_drvdata(cam->v4ldev, NULL);
1463 video_unregister_device(cam->v4ldev);
1464
1465 up(&sn9c102_sysfs_lock);
1466
1467 kfree(cam->control_buffer);
1468}
1469
1470/*****************************************************************************/
1471
1472static int sn9c102_open(struct inode* inode, struct file* filp)
1473{
1474 struct sn9c102_device* cam;
1475 int err = 0;
1476
1477 /*
1478 This is the only safe way to prevent race conditions with
1479 disconnect
1480 */
1481 if (!down_read_trylock(&sn9c102_disconnect))
1482 return -ERESTARTSYS;
1483
1484 cam = video_get_drvdata(video_devdata(filp));
1485
1486 if (down_interruptible(&cam->dev_sem)) {
1487 up_read(&sn9c102_disconnect);
1488 return -ERESTARTSYS;
1489 }
1490
1491 if (cam->users) {
a966f3e7 1492 DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
1da177e4
LT		 1493 if ((filp->f_flags & O_NONBLOCK) ||
1494 (filp->f_flags & O_NDELAY)) {
1495 err = -EWOULDBLOCK;
1496 goto out;
1497 }
1498 up(&cam->dev_sem);
1499 err = wait_event_interruptible_exclusive(cam->open,
1500 cam->state & DEV_DISCONNECTED
1501 || !cam->users);
1502 if (err) {
1503 up_read(&sn9c102_disconnect);
1504 return err;
1505 }
1506 if (cam->state & DEV_DISCONNECTED) {
1507 up_read(&sn9c102_disconnect);
1508 return -ENODEV;
1509 }
1510 down(&cam->dev_sem);
1511 }
1512
1513
1514 if (cam->state & DEV_MISCONFIGURED) {
1515 err = sn9c102_init(cam);
1516 if (err) {
1517 DBG(1, "Initialization failed again. "
a966f3e7 1518 "I will retry on next open().");
1da177e4
LT		 1519 goto out;
1520 }
1521 cam->state &= ~DEV_MISCONFIGURED;
1522 }
1523
1524 if ((err = sn9c102_start_transfer(cam)))
1525 goto out;
1526
1527 filp->private_data = cam;
1528 cam->users++;
1529 cam->io = IO_NONE;
1530 cam->stream = STREAM_OFF;
1531 cam->nbuffers = 0;
1532 cam->frame_count = 0;
1533 sn9c102_empty_framequeues(cam);
1534
a966f3e7 1535 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
1da177e4
LT		 1536
1537out:
1538 up(&cam->dev_sem);
1539 up_read(&sn9c102_disconnect);
1540 return err;
1541}
1542
1543
1544static int sn9c102_release(struct inode* inode, struct file* filp)
1545{
1546 struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp));
1547
1548 down(&cam->dev_sem); /* prevent disconnect() to be called */
1549
1550 sn9c102_stop_transfer(cam);
1551
1552 sn9c102_release_buffers(cam);
1553
1554 if (cam->state & DEV_DISCONNECTED) {
1555 sn9c102_release_resources(cam);
1556 up(&cam->dev_sem);
1557 kfree(cam);
1558 return 0;
1559 }
1560
1561 cam->users--;
1562 wake_up_interruptible_nr(&cam->open, 1);
1563
a966f3e7 1564 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
1da177e4
LT		 1565
1566 up(&cam->dev_sem);
1567
1568 return 0;
1569}
1570
1571
1572static ssize_t
1573sn9c102_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
1574{
1575 struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp));
1576 struct sn9c102_frame_t* f, * i;
1577 unsigned long lock_flags;
1578 int err = 0;
1579
1580 if (down_interruptible(&cam->fileop_sem))
1581 return -ERESTARTSYS;
1582
1583 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 1584 DBG(1, "Device not present");
1da177e4
LT		 1585 up(&cam->fileop_sem);
1586 return -ENODEV;
1587 }
1588
1589 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 1590 DBG(1, "The camera is misconfigured. Close and open it "
1591 "again.");
1da177e4
LT		 1592 up(&cam->fileop_sem);
1593 return -EIO;
1594 }
1595
1596 if (cam->io == IO_MMAP) {
1597 DBG(3, "Close and open the device again to choose "
a966f3e7 1598 "the read method");
1da177e4
LT		 1599 up(&cam->fileop_sem);
1600 return -EINVAL;
1601 }
1602
1603 if (cam->io == IO_NONE) {
1604 if (!sn9c102_request_buffers(cam,cam->nreadbuffers, IO_READ)) {
a966f3e7 1605 DBG(1, "read() failed, not enough memory");
1da177e4
LT		 1606 up(&cam->fileop_sem);
1607 return -ENOMEM;
1608 }
1609 cam->io = IO_READ;
1610 cam->stream = STREAM_ON;
a966f3e7
LR		 1611 }
1612
1613 if (list_empty(&cam->inqueue)) {
1614 if (!list_empty(&cam->outqueue))
1615 sn9c102_empty_framequeues(cam);
1da177e4
LT		 1616 sn9c102_queue_unusedframes(cam);
1617 }
1618
1619 if (!count) {
1620 up(&cam->fileop_sem);
1621 return 0;
1622 }
1623
1624 if (list_empty(&cam->outqueue)) {
1625 if (filp->f_flags & O_NONBLOCK) {
1626 up(&cam->fileop_sem);
1627 return -EAGAIN;
1628 }
1629 err = wait_event_interruptible
1630 ( cam->wait_frame,
1631 (!list_empty(&cam->outqueue)) ||
1632 (cam->state & DEV_DISCONNECTED) ||
1633 (cam->state & DEV_MISCONFIGURED) );
1634 if (err) {
1635 up(&cam->fileop_sem);
1636 return err;
1637 }
1638 if (cam->state & DEV_DISCONNECTED) {
1639 up(&cam->fileop_sem);
1640 return -ENODEV;
1641 }
1642 if (cam->state & DEV_MISCONFIGURED) {
1643 up(&cam->fileop_sem);
1644 return -EIO;
1645 }
1646 }
1647
1648 f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame);
1649
a966f3e7
LR		 1650 if (count > f->buf.bytesused)
1651 count = f->buf.bytesused;
1652
1653 if (copy_to_user(buf, f->bufmem, count)) {
1654 err = -EFAULT;
1655 goto exit;
1656 }
1657 *f_pos += count;
1658
1659exit:
1da177e4
LT		 1660 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1661 list_for_each_entry(i, &cam->outqueue, frame)
1662 i->state = F_UNUSED;
1663 INIT_LIST_HEAD(&cam->outqueue);
1664 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1665
1666 sn9c102_queue_unusedframes(cam);
1667
a966f3e7
LR		 1668 PDBGG("Frame #%lu, bytes read: %zu",
1669 (unsigned long)f->buf.index, count);
1da177e4
LT		 1670
1671 up(&cam->fileop_sem);
1672
1673 return count;
1674}
1675
1676
1677static unsigned int sn9c102_poll(struct file *filp, poll_table *wait)
1678{
1679 struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp));
a966f3e7
LR		 1680 struct sn9c102_frame_t* f;
1681 unsigned long lock_flags;
1da177e4
LT		 1682 unsigned int mask = 0;
1683
1684 if (down_interruptible(&cam->fileop_sem))
1685 return POLLERR;
1686
1687 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 1688 DBG(1, "Device not present");
1da177e4
LT		 1689 goto error;
1690 }
1691
1692 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 1693 DBG(1, "The camera is misconfigured. Close and open it "
1694 "again.");
1da177e4
LT		 1695 goto error;
1696 }
1697
1698 if (cam->io == IO_NONE) {
1699 if (!sn9c102_request_buffers(cam, cam->nreadbuffers,
1700 IO_READ)) {
a966f3e7 1701 DBG(1, "poll() failed, not enough memory");
1da177e4
LT		 1702 goto error;
1703 }
1704 cam->io = IO_READ;
1705 cam->stream = STREAM_ON;
1706 }
1707
a966f3e7
LR		 1708 if (cam->io == IO_READ) {
1709 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1710 list_for_each_entry(f, &cam->outqueue, frame)
1711 f->state = F_UNUSED;
1712 INIT_LIST_HEAD(&cam->outqueue);
1713 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1da177e4 1714 sn9c102_queue_unusedframes(cam);
a966f3e7 1715 }
1da177e4
LT		 1716
1717 poll_wait(filp, &cam->wait_frame, wait);
1718
1719 if (!list_empty(&cam->outqueue))
1720 mask |= POLLIN | POLLRDNORM;
1721
1722 up(&cam->fileop_sem);
1723
1724 return mask;
1725
1726error:
1727 up(&cam->fileop_sem);
1728 return POLLERR;
1729}
1730
1731
1732static void sn9c102_vm_open(struct vm_area_struct* vma)
1733{
1734 struct sn9c102_frame_t* f = vma->vm_private_data;
1735 f->vma_use_count++;
1736}
1737
1738
1739static void sn9c102_vm_close(struct vm_area_struct* vma)
1740{
1741 /* NOTE: buffers are not freed here */
1742 struct sn9c102_frame_t* f = vma->vm_private_data;
1743 f->vma_use_count--;
1744}
1745
1746
1747static struct vm_operations_struct sn9c102_vm_ops = {
1748 .open = sn9c102_vm_open,
1749 .close = sn9c102_vm_close,
1750};
1751
1752
1753static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma)
1754{
1755 struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp));
1756 unsigned long size = vma->vm_end - vma->vm_start,
1757 start = vma->vm_start,
1758 pos,
1759 page;
1760 u32 i;
1761
1762 if (down_interruptible(&cam->fileop_sem))
1763 return -ERESTARTSYS;
1764
1765 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 1766 DBG(1, "Device not present");
1da177e4
LT		 1767 up(&cam->fileop_sem);
1768 return -ENODEV;
1769 }
1770
1771 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 1772 DBG(1, "The camera is misconfigured. Close and open it "
1773 "again.");
1da177e4
LT		 1774 up(&cam->fileop_sem);
1775 return -EIO;
1776 }
1777
1778 if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
1779 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1780 up(&cam->fileop_sem);
1781 return -EINVAL;
1782 }
1783
1784 for (i = 0; i < cam->nbuffers; i++) {
1785 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1786 break;
1787 }
1788 if (i == cam->nbuffers) {
1789 up(&cam->fileop_sem);
1790 return -EINVAL;
1791 }
1792
1793 /* VM_IO is eventually going to replace PageReserved altogether */
1794 vma->vm_flags |= VM_IO;
1795 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
1796
1797 pos = (unsigned long)cam->frame[i].bufmem;
1798 while (size > 0) { /* size is page-aligned */
1799 page = vmalloc_to_pfn((void *)pos);
1800 if (remap_pfn_range(vma, start, page, PAGE_SIZE,
1801 vma->vm_page_prot)) {
1802 up(&cam->fileop_sem);
1803 return -EAGAIN;
1804 }
1805 start += PAGE_SIZE;
1806 pos += PAGE_SIZE;
1807 size -= PAGE_SIZE;
1808 }
1809
1810 vma->vm_ops = &sn9c102_vm_ops;
1811 vma->vm_private_data = &cam->frame[i];
1812
1813 sn9c102_vm_open(vma);
1814
1815 up(&cam->fileop_sem);
1816
1817 return 0;
1818}
1819
a966f3e7 1820/*****************************************************************************/
1da177e4 1821
a966f3e7
LR		 1822static int
1823sn9c102_vidioc_querycap(struct sn9c102_device* cam, void __user * arg)
1da177e4 1824{
a966f3e7
LR		 1825 struct v4l2_capability cap = {
1826 .driver = "sn9c102",
1827 .version = SN9C102_MODULE_VERSION_CODE,
1828 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1829 V4L2_CAP_STREAMING,
1830 };
1831
1832 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1833 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1834 strlcpy(cap.bus_info, cam->dev.bus_id, sizeof(cap.bus_info));
1835
1836 if (copy_to_user(arg, &cap, sizeof(cap)))
1837 return -EFAULT;
1da177e4 1838
a966f3e7
LR		 1839 return 0;
1840}
1da177e4 1841
1da177e4 1842
a966f3e7
LR		 1843static int
1844sn9c102_vidioc_enuminput(struct sn9c102_device* cam, void __user * arg)
1845{
1846 struct v4l2_input i;
1da177e4 1847
a966f3e7
LR		 1848 if (copy_from_user(&i, arg, sizeof(i)))
1849 return -EFAULT;
1da177e4 1850
a966f3e7
LR		 1851 if (i.index)
1852 return -EINVAL;
1da177e4 1853
a966f3e7
LR		 1854 memset(&i, 0, sizeof(i));
1855 strcpy(i.name, "USB");
1da177e4 1856
a966f3e7
LR		 1857 if (copy_to_user(arg, &i, sizeof(i)))
1858 return -EFAULT;
1da177e4 1859
a966f3e7
LR		 1860 return 0;
1861}
1da177e4 1862
1da177e4 1863
a966f3e7
LR		 1864static int
1865sn9c102_vidioc_gs_input(struct sn9c102_device* cam, void __user * arg)
1866{
1867 int index;
1da177e4 1868
a966f3e7
LR		 1869 if (copy_from_user(&index, arg, sizeof(index)))
1870 return -EFAULT;
1da177e4 1871
a966f3e7 1872 if (index != 0)
1da177e4 1873 return -EINVAL;
1da177e4 1874
a966f3e7
LR		 1875 return 0;
1876}
1da177e4 1877
1da177e4 1878
a966f3e7
LR		 1879static int
1880sn9c102_vidioc_query_ctrl(struct sn9c102_device* cam, void __user * arg)
1881{
1882 struct sn9c102_sensor* s = cam->sensor;
1883 struct v4l2_queryctrl qc;
1884 u8 i;
1da177e4 1885
a966f3e7
LR		 1886 if (copy_from_user(&qc, arg, sizeof(qc)))
1887 return -EFAULT;
1da177e4 1888
a966f3e7
LR		 1889 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1890 if (qc.id && qc.id == s->qctrl[i].id) {
1891 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1892 if (copy_to_user(arg, &qc, sizeof(qc)))
1893 return -EFAULT;
1894 return 0;
1895 }
1da177e4 1896
a966f3e7
LR		 1897 return -EINVAL;
1898}
1da177e4 1899
1da177e4 1900
a966f3e7
LR		 1901static int
1902sn9c102_vidioc_g_ctrl(struct sn9c102_device* cam, void __user * arg)
1903{
1904 struct sn9c102_sensor* s = cam->sensor;
1905 struct v4l2_control ctrl;
1906 int err = 0;
1907 u8 i;
1da177e4 1908
a966f3e7
LR		 1909 if (!s->get_ctrl && !s->set_ctrl)
1910 return -EINVAL;
1da177e4 1911
a966f3e7
LR		 1912 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1913 return -EFAULT;
1914
1915 if (!s->get_ctrl) {
52950ed4 1916 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
a966f3e7
LR		 1917 if (ctrl.id && ctrl.id == s->qctrl[i].id) {
1918 ctrl.value = s->_qctrl[i].default_value;
1919 goto exit;
1da177e4 1920 }
a966f3e7
LR		 1921 return -EINVAL;
1922 } else
1923 err = s->get_ctrl(cam, &ctrl);
1da177e4 1924
a966f3e7
LR		 1925exit:
1926 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1927 return -EFAULT;
1da177e4 1928
a966f3e7
LR		 1929 return err;
1930}
1da177e4 1931
1da177e4 1932
a966f3e7
LR		 1933static int
1934sn9c102_vidioc_s_ctrl(struct sn9c102_device* cam, void __user * arg)
1935{
1936 struct sn9c102_sensor* s = cam->sensor;
1937 struct v4l2_control ctrl;
1938 u8 i;
1939 int err = 0;
1da177e4 1940
a966f3e7
LR		 1941 if (!s->set_ctrl)
1942 return -EINVAL;
1da177e4 1943
a966f3e7
LR		 1944 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1945 return -EFAULT;
1da177e4 1946
a966f3e7
LR		 1947 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1948 if (ctrl.id == s->qctrl[i].id) {
1949 if (ctrl.value < s->qctrl[i].minimum ||
1950 ctrl.value > s->qctrl[i].maximum)
1951 return -ERANGE;
1952 ctrl.value -= ctrl.value % s->qctrl[i].step;
1953 break;
1954 }
1da177e4 1955
a966f3e7
LR		 1956 if ((err = s->set_ctrl(cam, &ctrl)))
1957 return err;
1da177e4 1958
a966f3e7 1959 s->_qctrl[i].default_value = ctrl.value;
1da177e4 1960
a966f3e7
LR		 1961 PDBGG("VIDIOC_S_CTRL: id %lu, value %lu",
1962 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
1da177e4 1963
a966f3e7
LR		 1964 return 0;
1965}
1da177e4 1966
1da177e4 1967
a966f3e7
LR		 1968static int
1969sn9c102_vidioc_cropcap(struct sn9c102_device* cam, void __user * arg)
1970{
1971 struct v4l2_cropcap* cc = &(cam->sensor->cropcap);
1da177e4 1972
a966f3e7
LR		 1973 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1974 cc->pixelaspect.numerator = 1;
1975 cc->pixelaspect.denominator = 1;
1da177e4 1976
a966f3e7
LR		 1977 if (copy_to_user(arg, cc, sizeof(*cc)))
1978 return -EFAULT;
1da177e4 1979
a966f3e7
LR		 1980 return 0;
1981}
1da177e4 1982
1da177e4 1983
a966f3e7
LR		 1984static int
1985sn9c102_vidioc_g_crop(struct sn9c102_device* cam, void __user * arg)
1986{
1987 struct sn9c102_sensor* s = cam->sensor;
1988 struct v4l2_crop crop = {
1989 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1990 };
1da177e4 1991
a966f3e7 1992 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1da177e4 1993
a966f3e7
LR		 1994 if (copy_to_user(arg, &crop, sizeof(crop)))
1995 return -EFAULT;
1da177e4 1996
a966f3e7
LR		 1997 return 0;
1998}
1da177e4 1999
1da177e4 2000
a966f3e7
LR		 2001static int
2002sn9c102_vidioc_s_crop(struct sn9c102_device* cam, void __user * arg)
2003{
2004 struct sn9c102_sensor* s = cam->sensor;
2005 struct v4l2_crop crop;
2006 struct v4l2_rect* rect;
2007 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2008 struct v4l2_pix_format* pix_format = &(s->pix_format);
2009 u8 scale;
2010 const enum sn9c102_stream_state stream = cam->stream;
2011 const u32 nbuffers = cam->nbuffers;
2012 u32 i;
2013 int err = 0;
1da177e4 2014
a966f3e7
LR		 2015 if (copy_from_user(&crop, arg, sizeof(crop)))
2016 return -EFAULT;
1da177e4 2017
a966f3e7 2018 rect = &(crop.c);
1da177e4 2019
a966f3e7
LR		 2020 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2021 return -EINVAL;
1da177e4 2022
a966f3e7
LR		 2023 if (cam->module_param.force_munmap)
2024 for (i = 0; i < cam->nbuffers; i++)
2025 if (cam->frame[i].vma_use_count) {
2026 DBG(3, "VIDIOC_S_CROP failed. "
2027 "Unmap the buffers first.");
2028 return -EINVAL;
2029 }
1da177e4 2030
a966f3e7
LR		 2031 /* Preserve R,G or B origin */
2032 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
2033 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
2034
2035 if (rect->width < 16)
2036 rect->width = 16;
2037 if (rect->height < 16)
2038 rect->height = 16;
2039 if (rect->width > bounds->width)
2040 rect->width = bounds->width;
2041 if (rect->height > bounds->height)
2042 rect->height = bounds->height;
2043 if (rect->left < bounds->left)
2044 rect->left = bounds->left;
2045 if (rect->top < bounds->top)
2046 rect->top = bounds->top;
2047 if (rect->left + rect->width > bounds->left + bounds->width)
2048 rect->left = bounds->left+bounds->width - rect->width;
2049 if (rect->top + rect->height > bounds->top + bounds->height)
2050 rect->top = bounds->top+bounds->height - rect->height;
2051
2052 rect->width &= ~15L;
2053 rect->height &= ~15L;
2054
2055 if (SN9C102_PRESERVE_IMGSCALE) {
2056 /* Calculate the actual scaling factor */
2057 u32 a, b;
2058 a = rect->width * rect->height;
2059 b = pix_format->width * pix_format->height;
2060 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2061 } else
2062 scale = 1;
2063
2064 if (cam->stream == STREAM_ON)
2065 if ((err = sn9c102_stream_interrupt(cam)))
2066 return err;
1da177e4 2067
a966f3e7
LR		 2068 if (copy_to_user(arg, &crop, sizeof(crop))) {
2069 cam->stream = stream;
2070 return -EFAULT;
1da177e4
LT		 2071 }
2072
a966f3e7
LR		 2073 if (cam->module_param.force_munmap || cam->io == IO_READ)
2074 sn9c102_release_buffers(cam);
1da177e4 2075
a966f3e7
LR		 2076 err = sn9c102_set_crop(cam, rect);
2077 if (s->set_crop)
2078 err += s->set_crop(cam, rect);
2079 err += sn9c102_set_scale(cam, scale);
1da177e4 2080
a966f3e7
LR		 2081 if (err) { /* atomic, no rollback in ioctl() */
2082 cam->state |= DEV_MISCONFIGURED;
2083 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
2084 "use the camera, close and open /dev/video%d again.",
2085 cam->v4ldev->minor);
2086 return -EIO;
2087 }
1da177e4 2088
a966f3e7
LR		 2089 s->pix_format.width = rect->width/scale;
2090 s->pix_format.height = rect->height/scale;
2091 memcpy(&(s->_rect), rect, sizeof(*rect));
1da177e4 2092
a966f3e7
LR		 2093 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2094 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2095 cam->state |= DEV_MISCONFIGURED;
2096 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
2097 "use the camera, close and open /dev/video%d again.",
2098 cam->v4ldev->minor);
2099 return -ENOMEM;
1da177e4
LT		 2100 }
2101
a966f3e7
LR		 2102 if (cam->io == IO_READ)
2103 sn9c102_empty_framequeues(cam);
2104 else if (cam->module_param.force_munmap)
2105 sn9c102_requeue_outqueue(cam);
1da177e4 2106
a966f3e7 2107 cam->stream = stream;
1da177e4 2108
a966f3e7
LR		 2109 return 0;
2110}
1da177e4 2111
1da177e4 2112
a966f3e7
LR		 2113static int
2114sn9c102_vidioc_enum_fmt(struct sn9c102_device* cam, void __user * arg)
2115{
2116 struct v4l2_fmtdesc fmtd;
1da177e4 2117
a966f3e7
LR		 2118 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
2119 return -EFAULT;
1da177e4 2120
a966f3e7
LR		 2121 if (fmtd.index == 0) {
2122 strcpy(fmtd.description, "bayer rgb");
2123 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
2124 } else if (fmtd.index == 1) {
2125 strcpy(fmtd.description, "compressed");
2126 fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X;
2127 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
2128 } else
2129 return -EINVAL;
1da177e4 2130
a966f3e7
LR		 2131 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2132 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1da177e4 2133
a966f3e7
LR		 2134 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
2135 return -EFAULT;
1da177e4 2136
a966f3e7
LR		 2137 return 0;
2138}
1da177e4 2139
1da177e4 2140
a966f3e7
LR		 2141static int
2142sn9c102_vidioc_g_fmt(struct sn9c102_device* cam, void __user * arg)
2143{
2144 struct v4l2_format format;
2145 struct v4l2_pix_format* pfmt = &(cam->sensor->pix_format);
1da177e4 2146
a966f3e7
LR		 2147 if (copy_from_user(&format, arg, sizeof(format)))
2148 return -EFAULT;
1da177e4 2149
a966f3e7
LR		 2150 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2151 return -EINVAL;
1da177e4 2152
a966f3e7
LR		 2153 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_SN9C10X)
2154 ? 0 : (pfmt->width * pfmt->priv) / 8;
2155 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
2156 pfmt->field = V4L2_FIELD_NONE;
2157 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1da177e4 2158
a966f3e7
LR		 2159 if (copy_to_user(arg, &format, sizeof(format)))
2160 return -EFAULT;
1da177e4 2161
a966f3e7
LR		 2162 return 0;
2163}
1da177e4 2164
1da177e4 2165
a966f3e7
LR		 2166static int
2167sn9c102_vidioc_try_s_fmt(struct sn9c102_device* cam, unsigned int cmd,
2168 void __user * arg)
2169{
2170 struct sn9c102_sensor* s = cam->sensor;
2171 struct v4l2_format format;
2172 struct v4l2_pix_format* pix;
2173 struct v4l2_pix_format* pfmt = &(s->pix_format);
2174 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2175 struct v4l2_rect rect;
2176 u8 scale;
2177 const enum sn9c102_stream_state stream = cam->stream;
2178 const u32 nbuffers = cam->nbuffers;
2179 u32 i;
2180 int err = 0;
1da177e4 2181
a966f3e7
LR		 2182 if (copy_from_user(&format, arg, sizeof(format)))
2183 return -EFAULT;
1da177e4 2184
a966f3e7 2185 pix = &(format.fmt.pix);
1da177e4 2186
a966f3e7
LR		 2187 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2188 return -EINVAL;
1da177e4 2189
a966f3e7 2190 memcpy(&rect, &(s->_rect), sizeof(rect));
1da177e4 2191
a966f3e7
LR		 2192 { /* calculate the actual scaling factor */
2193 u32 a, b;
2194 a = rect.width * rect.height;
2195 b = pix->width * pix->height;
2196 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
1da177e4
LT		 2197 }
2198
a966f3e7
LR		 2199 rect.width = scale * pix->width;
2200 rect.height = scale * pix->height;
1da177e4 2201
a966f3e7
LR		 2202 if (rect.width < 16)
2203 rect.width = 16;
2204 if (rect.height < 16)
2205 rect.height = 16;
2206 if (rect.width > bounds->left + bounds->width - rect.left)
2207 rect.width = bounds->left + bounds->width - rect.left;
2208 if (rect.height > bounds->top + bounds->height - rect.top)
2209 rect.height = bounds->top + bounds->height - rect.top;
1da177e4 2210
a966f3e7
LR		 2211 rect.width &= ~15L;
2212 rect.height &= ~15L;
1da177e4 2213
a966f3e7
LR		 2214 { /* adjust the scaling factor */
2215 u32 a, b;
2216 a = rect.width * rect.height;
2217 b = pix->width * pix->height;
2218 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2219 }
2220
2221 pix->width = rect.width / scale;
2222 pix->height = rect.height / scale;
2223
2224 if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X &&
2225 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2226 pix->pixelformat = pfmt->pixelformat;
2227 pix->priv = pfmt->priv; /* bpp */
2228 pix->colorspace = pfmt->colorspace;
2229 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X)
2230 ? 0 : (pix->width * pix->priv) / 8;
2231 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2232 pix->field = V4L2_FIELD_NONE;
2233
2234 if (cmd == VIDIOC_TRY_FMT) {
2235 if (copy_to_user(arg, &format, sizeof(format)))
2236 return -EFAULT;
2237 return 0;
2238 }
1da177e4 2239
a966f3e7 2240 if (cam->module_param.force_munmap)
1da177e4
LT		 2241 for (i = 0; i < cam->nbuffers; i++)
2242 if (cam->frame[i].vma_use_count) {
a966f3e7
LR		 2243 DBG(3, "VIDIOC_S_FMT failed. Unmap the "
2244 "buffers first.");
1da177e4
LT		 2245 return -EINVAL;
2246 }
2247
a966f3e7
LR		 2248 if (cam->stream == STREAM_ON)
2249 if ((err = sn9c102_stream_interrupt(cam)))
2250 return err;
1da177e4 2251
a966f3e7
LR		 2252 if (copy_to_user(arg, &format, sizeof(format))) {
2253 cam->stream = stream;
2254 return -EFAULT;
2255 }
1da177e4 2256
a966f3e7 2257 if (cam->module_param.force_munmap || cam->io == IO_READ)
1da177e4 2258 sn9c102_release_buffers(cam);
1da177e4 2259
a966f3e7
LR		 2260 err += sn9c102_set_pix_format(cam, pix);
2261 err += sn9c102_set_crop(cam, &rect);
2262 if (s->set_pix_format)
2263 err += s->set_pix_format(cam, pix);
2264 if (s->set_crop)
2265 err += s->set_crop(cam, &rect);
2266 err += sn9c102_set_scale(cam, scale);
1da177e4 2267
a966f3e7
LR		 2268 if (err) { /* atomic, no rollback in ioctl() */
2269 cam->state |= DEV_MISCONFIGURED;
2270 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2271 "use the camera, close and open /dev/video%d again.",
2272 cam->v4ldev->minor);
2273 return -EIO;
2274 }
1da177e4 2275
a966f3e7
LR		 2276 memcpy(pfmt, pix, sizeof(*pix));
2277 memcpy(&(s->_rect), &rect, sizeof(rect));
2278
2279 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2280 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2281 cam->state |= DEV_MISCONFIGURED;
2282 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2283 "use the camera, close and open /dev/video%d again.",
2284 cam->v4ldev->minor);
2285 return -ENOMEM;
1da177e4
LT		 2286 }
2287
a966f3e7
LR		 2288 if (cam->io == IO_READ)
2289 sn9c102_empty_framequeues(cam);
2290 else if (cam->module_param.force_munmap)
2291 sn9c102_requeue_outqueue(cam);
1da177e4 2292
a966f3e7 2293 cam->stream = stream;
1da177e4 2294
a966f3e7
LR		 2295 return 0;
2296}
2297
2298
2299static int
2300sn9c102_vidioc_g_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2301{
2302 if (copy_to_user(arg, &cam->compression,
2303 sizeof(cam->compression)))
2304 return -EFAULT;
1da177e4 2305
a966f3e7
LR		 2306 return 0;
2307}
1da177e4 2308
1da177e4 2309
a966f3e7
LR		 2310static int
2311sn9c102_vidioc_s_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2312{
2313 struct v4l2_jpegcompression jc;
2314 const enum sn9c102_stream_state stream = cam->stream;
2315 int err = 0;
1da177e4 2316
a966f3e7
LR		 2317 if (copy_from_user(&jc, arg, sizeof(jc)))
2318 return -EFAULT;
1da177e4 2319
a966f3e7
LR		 2320 if (jc.quality != 0 && jc.quality != 1)
2321 return -EINVAL;
2322
2323 if (cam->stream == STREAM_ON)
2324 if ((err = sn9c102_stream_interrupt(cam)))
2325 return err;
2326
2327 err += sn9c102_set_compression(cam, &jc);
2328 if (err) { /* atomic, no rollback in ioctl() */
2329 cam->state |= DEV_MISCONFIGURED;
2330 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2331 "problems. To use the camera, close and open "
2332 "/dev/video%d again.", cam->v4ldev->minor);
2333 return -EIO;
1da177e4
LT		 2334 }
2335
a966f3e7 2336 cam->compression.quality = jc.quality;
1da177e4 2337
a966f3e7 2338 cam->stream = stream;
1da177e4 2339
a966f3e7
LR		 2340 return 0;
2341}
1da177e4 2342
a966f3e7
LR		 2343
2344static int
2345sn9c102_vidioc_reqbufs(struct sn9c102_device* cam, void __user * arg)
2346{
2347 struct v4l2_requestbuffers rb;
2348 u32 i;
2349 int err;
2350
2351 if (copy_from_user(&rb, arg, sizeof(rb)))
2352 return -EFAULT;
2353
2354 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2355 rb.memory != V4L2_MEMORY_MMAP)
2356 return -EINVAL;
2357
2358 if (cam->io == IO_READ) {
2359 DBG(3, "Close and open the device again to choose the mmap "
2360 "I/O method");
2361 return -EINVAL;
2362 }
2363
2364 for (i = 0; i < cam->nbuffers; i++)
2365 if (cam->frame[i].vma_use_count) {
2366 DBG(3, "VIDIOC_REQBUFS failed. Previous buffers are "
2367 "still mapped.");
1da177e4 2368 return -EINVAL;
a966f3e7 2369 }
1da177e4 2370
a966f3e7
LR		 2371 if (cam->stream == STREAM_ON)
2372 if ((err = sn9c102_stream_interrupt(cam)))
2373 return err;
1da177e4 2374
a966f3e7 2375 sn9c102_empty_framequeues(cam);
1da177e4 2376
a966f3e7
LR		 2377 sn9c102_release_buffers(cam);
2378 if (rb.count)
2379 rb.count = sn9c102_request_buffers(cam, rb.count, IO_MMAP);
1da177e4 2380
a966f3e7
LR		 2381 if (copy_to_user(arg, &rb, sizeof(rb))) {
2382 sn9c102_release_buffers(cam);
2383 cam->io = IO_NONE;
2384 return -EFAULT;
1da177e4
LT		 2385 }
2386
a966f3e7 2387 cam->io = rb.count ? IO_MMAP : IO_NONE;
1da177e4 2388
a966f3e7
LR		 2389 return 0;
2390}
1da177e4 2391
1da177e4 2392
a966f3e7
LR		 2393static int
2394sn9c102_vidioc_querybuf(struct sn9c102_device* cam, void __user * arg)
2395{
2396 struct v4l2_buffer b;
1da177e4 2397
a966f3e7
LR		 2398 if (copy_from_user(&b, arg, sizeof(b)))
2399 return -EFAULT;
1da177e4 2400
a966f3e7
LR		 2401 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2402 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2403 return -EINVAL;
1da177e4 2404
a966f3e7 2405 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
1da177e4 2406
a966f3e7
LR		 2407 if (cam->frame[b.index].vma_use_count)
2408 b.flags |= V4L2_BUF_FLAG_MAPPED;
1da177e4 2409
a966f3e7
LR		 2410 if (cam->frame[b.index].state == F_DONE)
2411 b.flags |= V4L2_BUF_FLAG_DONE;
2412 else if (cam->frame[b.index].state != F_UNUSED)
2413 b.flags |= V4L2_BUF_FLAG_QUEUED;
1da177e4 2414
a966f3e7
LR		 2415 if (copy_to_user(arg, &b, sizeof(b)))
2416 return -EFAULT;
1da177e4 2417
a966f3e7
LR		 2418 return 0;
2419}
1da177e4 2420
1da177e4 2421
a966f3e7
LR		 2422static int
2423sn9c102_vidioc_qbuf(struct sn9c102_device* cam, void __user * arg)
2424{
2425 struct v4l2_buffer b;
2426 unsigned long lock_flags;
1da177e4 2427
a966f3e7
LR		 2428 if (copy_from_user(&b, arg, sizeof(b)))
2429 return -EFAULT;
1da177e4 2430
a966f3e7
LR		 2431 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2432 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2433 return -EINVAL;
1da177e4 2434
a966f3e7
LR		 2435 if (cam->frame[b.index].state != F_UNUSED)
2436 return -EINVAL;
1da177e4 2437
a966f3e7 2438 cam->frame[b.index].state = F_QUEUED;
1da177e4 2439
a966f3e7
LR		 2440 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2441 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2442 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1da177e4 2443
a966f3e7 2444 PDBGG("Frame #%lu queued", (unsigned long)b.index);
1da177e4 2445
a966f3e7
LR		 2446 return 0;
2447}
1da177e4 2448
1da177e4 2449
a966f3e7
LR		 2450static int
2451sn9c102_vidioc_dqbuf(struct sn9c102_device* cam, struct file* filp,
2452 void __user * arg)
2453{
2454 struct v4l2_buffer b;
2455 struct sn9c102_frame_t *f;
2456 unsigned long lock_flags;
2457 int err = 0;
1da177e4 2458
a966f3e7
LR		 2459 if (copy_from_user(&b, arg, sizeof(b)))
2460 return -EFAULT;
1da177e4 2461
a966f3e7
LR		 2462 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2463 return -EINVAL;
2464
2465 if (list_empty(&cam->outqueue)) {
2466 if (cam->stream == STREAM_OFF)
2467 return -EINVAL;
2468 if (filp->f_flags & O_NONBLOCK)
2469 return -EAGAIN;
2470 err = wait_event_interruptible
2471 ( cam->wait_frame,
2472 (!list_empty(&cam->outqueue)) ||
2473 (cam->state & DEV_DISCONNECTED) ||
2474 (cam->state & DEV_MISCONFIGURED) );
2475 if (err)
2476 return err;
2477 if (cam->state & DEV_DISCONNECTED)
2478 return -ENODEV;
2479 if (cam->state & DEV_MISCONFIGURED)
2480 return -EIO;
1da177e4
LT		 2481 }
2482
a966f3e7
LR		 2483 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2484 f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, frame);
2485 list_del(cam->outqueue.next);
2486 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1da177e4 2487
a966f3e7 2488 f->state = F_UNUSED;
1da177e4 2489
a966f3e7
LR		 2490 memcpy(&b, &f->buf, sizeof(b));
2491 if (f->vma_use_count)
2492 b.flags |= V4L2_BUF_FLAG_MAPPED;
2493
2494 if (copy_to_user(arg, &b, sizeof(b)))
2495 return -EFAULT;
2496
2497 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2498
2499 return 0;
2500}
2501
2502
2503static int
2504sn9c102_vidioc_streamon(struct sn9c102_device* cam, void __user * arg)
2505{
2506 int type;
2507
2508 if (copy_from_user(&type, arg, sizeof(type)))
2509 return -EFAULT;
2510
2511 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2512 return -EINVAL;
2513
2514 if (list_empty(&cam->inqueue))
2515 return -EINVAL;
2516
2517 cam->stream = STREAM_ON;
2518
2519 DBG(3, "Stream on");
2520
2521 return 0;
2522}
2523
2524
2525static int
2526sn9c102_vidioc_streamoff(struct sn9c102_device* cam, void __user * arg)
2527{
2528 int type, err;
2529
2530 if (copy_from_user(&type, arg, sizeof(type)))
2531 return -EFAULT;
2532
2533 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2534 return -EINVAL;
2535
2536 if (cam->stream == STREAM_ON)
2537 if ((err = sn9c102_stream_interrupt(cam)))
2538 return err;
2539
2540 sn9c102_empty_framequeues(cam);
2541
2542 DBG(3, "Stream off");
2543
2544 return 0;
2545}
2546
2547
2548static int
2549sn9c102_vidioc_g_parm(struct sn9c102_device* cam, void __user * arg)
2550{
2551 struct v4l2_streamparm sp;
2552
2553 if (copy_from_user(&sp, arg, sizeof(sp)))
2554 return -EFAULT;
2555
2556 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2557 return -EINVAL;
2558
2559 sp.parm.capture.extendedmode = 0;
2560 sp.parm.capture.readbuffers = cam->nreadbuffers;
2561
2562 if (copy_to_user(arg, &sp, sizeof(sp)))
2563 return -EFAULT;
2564
2565 return 0;
2566}
2567
2568
2569static int
2570sn9c102_vidioc_s_parm(struct sn9c102_device* cam, void __user * arg)
2571{
2572 struct v4l2_streamparm sp;
2573
2574 if (copy_from_user(&sp, arg, sizeof(sp)))
2575 return -EFAULT;
2576
2577 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2578 return -EINVAL;
2579
2580 sp.parm.capture.extendedmode = 0;
1da177e4 2581
a966f3e7 2582 if (sp.parm.capture.readbuffers == 0)
1da177e4
LT		 2583 sp.parm.capture.readbuffers = cam->nreadbuffers;
2584
a966f3e7
LR		 2585 if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES)
2586 sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES;
1da177e4 2587
a966f3e7
LR		 2588 if (copy_to_user(arg, &sp, sizeof(sp)))
2589 return -EFAULT;
1da177e4 2590
a966f3e7 2591 cam->nreadbuffers = sp.parm.capture.readbuffers;
1da177e4 2592
a966f3e7
LR		 2593 return 0;
2594}
1da177e4 2595
1da177e4 2596
a966f3e7
LR		 2597static int sn9c102_ioctl_v4l2(struct inode* inode, struct file* filp,
2598 unsigned int cmd, void __user * arg)
2599{
2600 struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp));
1da177e4 2601
a966f3e7 2602 switch (cmd) {
1da177e4 2603
a966f3e7
LR		 2604 case VIDIOC_QUERYCAP:
2605 return sn9c102_vidioc_querycap(cam, arg);
1da177e4 2606
a966f3e7
LR		 2607 case VIDIOC_ENUMINPUT:
2608 return sn9c102_vidioc_enuminput(cam, arg);
1da177e4 2609
a966f3e7
LR		 2610 case VIDIOC_G_INPUT:
2611 case VIDIOC_S_INPUT:
2612 return sn9c102_vidioc_gs_input(cam, arg);
1da177e4 2613
a966f3e7
LR		 2614 case VIDIOC_QUERYCTRL:
2615 return sn9c102_vidioc_query_ctrl(cam, arg);
2616
2617 case VIDIOC_G_CTRL:
2618 return sn9c102_vidioc_g_ctrl(cam, arg);
2619
2620 case VIDIOC_S_CTRL_OLD:
2621 case VIDIOC_S_CTRL:
2622 return sn9c102_vidioc_s_ctrl(cam, arg);
2623
2624 case VIDIOC_CROPCAP_OLD:
2625 case VIDIOC_CROPCAP:
2626 return sn9c102_vidioc_cropcap(cam, arg);
2627
2628 case VIDIOC_G_CROP:
2629 return sn9c102_vidioc_g_crop(cam, arg);
2630
2631 case VIDIOC_S_CROP:
2632 return sn9c102_vidioc_s_crop(cam, arg);
2633
2634 case VIDIOC_ENUM_FMT:
2635 return sn9c102_vidioc_enum_fmt(cam, arg);
2636
2637 case VIDIOC_G_FMT:
2638 return sn9c102_vidioc_g_fmt(cam, arg);
2639
2640 case VIDIOC_TRY_FMT:
2641 case VIDIOC_S_FMT:
2642 return sn9c102_vidioc_try_s_fmt(cam, cmd, arg);
2643
2644 case VIDIOC_G_JPEGCOMP:
2645 return sn9c102_vidioc_g_jpegcomp(cam, arg);
2646
2647 case VIDIOC_S_JPEGCOMP:
2648 return sn9c102_vidioc_s_jpegcomp(cam, arg);
2649
2650 case VIDIOC_REQBUFS:
2651 return sn9c102_vidioc_reqbufs(cam, arg);
2652
2653 case VIDIOC_QUERYBUF:
2654 return sn9c102_vidioc_querybuf(cam, arg);
2655
2656 case VIDIOC_QBUF:
2657 return sn9c102_vidioc_qbuf(cam, arg);
2658
2659 case VIDIOC_DQBUF:
2660 return sn9c102_vidioc_dqbuf(cam, filp, arg);
2661
2662 case VIDIOC_STREAMON:
2663 return sn9c102_vidioc_streamon(cam, arg);
2664
2665 case VIDIOC_STREAMOFF:
2666 return sn9c102_vidioc_streamoff(cam, arg);
2667
2668 case VIDIOC_G_PARM:
2669 return sn9c102_vidioc_g_parm(cam, arg);
2670
2671 case VIDIOC_S_PARM_OLD:
2672 case VIDIOC_S_PARM:
2673 return sn9c102_vidioc_s_parm(cam, arg);
1da177e4
LT		 2674
2675 case VIDIOC_G_STD:
2676 case VIDIOC_S_STD:
2677 case VIDIOC_QUERYSTD:
2678 case VIDIOC_ENUMSTD:
2679 case VIDIOC_QUERYMENU:
2680 return -EINVAL;
2681
2682 default:
2683 return -EINVAL;
2684
2685 }
2686}
2687
2688
2689static int sn9c102_ioctl(struct inode* inode, struct file* filp,
2690 unsigned int cmd, unsigned long arg)
2691{
2692 struct sn9c102_device* cam = video_get_drvdata(video_devdata(filp));
2693 int err = 0;
2694
2695 if (down_interruptible(&cam->fileop_sem))
2696 return -ERESTARTSYS;
2697
2698 if (cam->state & DEV_DISCONNECTED) {
a966f3e7 2699 DBG(1, "Device not present");
1da177e4
LT		 2700 up(&cam->fileop_sem);
2701 return -ENODEV;
2702 }
2703
2704 if (cam->state & DEV_MISCONFIGURED) {
a966f3e7
LR		 2705 DBG(1, "The camera is misconfigured. Close and open it "
2706 "again.");
1da177e4
LT		 2707 up(&cam->fileop_sem);
2708 return -EIO;
2709 }
2710
2711 err = sn9c102_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
2712
2713 up(&cam->fileop_sem);
2714
2715 return err;
2716}
2717
a966f3e7 2718/*****************************************************************************/
1da177e4
LT		 2719
2720static struct file_operations sn9c102_fops = {
a966f3e7 2721 .owner = THIS_MODULE,
1da177e4
LT		 2722 .open = sn9c102_open,
2723 .release = sn9c102_release,
2724 .ioctl = sn9c102_ioctl,
2725 .read = sn9c102_read,
2726 .poll = sn9c102_poll,
2727 .mmap = sn9c102_mmap,
2728 .llseek = no_llseek,
2729};
2730
2731/*****************************************************************************/
2732
2733/* It exists a single interface only. We do not need to validate anything. */
2734static int
2735sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2736{
2737 struct usb_device *udev = interface_to_usbdev(intf);
2738 struct sn9c102_device* cam;
2739 static unsigned int dev_nr = 0;
a966f3e7 2740 unsigned int i;
1da177e4
LT		 2741 int err = 0, r;
2742
1da177e4
LT		 2743 if (!(cam = kmalloc(sizeof(struct sn9c102_device), GFP_KERNEL)))
2744 return -ENOMEM;
1da177e4
LT		 2745
2746 cam->usbdev = udev;
1da177e4
LT		 2747 memcpy(&cam->dev, &udev->dev, sizeof(struct device));
2748
2749 if (!(cam->control_buffer = kmalloc(8, GFP_KERNEL))) {
a966f3e7 2750 DBG(1, "kmalloc() failed");
1da177e4
LT		 2751 err = -ENOMEM;
2752 goto fail;
2753 }
1da177e4
LT		 2754
2755 if (!(cam->v4ldev = video_device_alloc())) {
a966f3e7 2756 DBG(1, "video_device_alloc() failed");
1da177e4
LT		 2757 err = -ENOMEM;
2758 goto fail;
2759 }
2760
2761 init_MUTEX(&cam->dev_sem);
2762
2763 r = sn9c102_read_reg(cam, 0x00);
2764 if (r < 0 || r != 0x10) {
2765 DBG(1, "Sorry, this is not a SN9C10x based camera "
a966f3e7 2766 "(vid/pid 0x%04X/0x%04X)", id->idVendor, id->idProduct);
1da177e4
LT		 2767 err = -ENODEV;
2768 goto fail;
2769 }
2770
a966f3e7 2771 cam->bridge = (id->idProduct & 0xffc0) == 0x6080 ?
1da177e4
LT		 2772 BRIDGE_SN9C103 : BRIDGE_SN9C102;
2773 switch (cam->bridge) {
2774 case BRIDGE_SN9C101:
2775 case BRIDGE_SN9C102:
2776 DBG(2, "SN9C10[12] PC Camera Controller detected "
a966f3e7 2777 "(vid/pid 0x%04X/0x%04X)", id->idVendor, id->idProduct);
1da177e4
LT		 2778 break;
2779 case BRIDGE_SN9C103:
2780 DBG(2, "SN9C103 PC Camera Controller detected "
a966f3e7 2781 "(vid/pid 0x%04X/0x%04X)", id->idVendor, id->idProduct);
1da177e4
LT		 2782 break;
2783 }
2784
2785 for (i = 0; sn9c102_sensor_table[i]; i++) {
2786 err = sn9c102_sensor_table[i](cam);
2787 if (!err)
2788 break;
2789 }
2790
2791 if (!err && cam->sensor) {
a966f3e7 2792 DBG(2, "%s image sensor detected", cam->sensor->name);
1da177e4 2793 DBG(3, "Support for %s maintained by %s",
a966f3e7 2794 cam->sensor->name, cam->sensor->maintainer);
1da177e4 2795 } else {
a966f3e7 2796 DBG(1, "No supported image sensor detected");
1da177e4
LT		 2797 err = -ENODEV;
2798 goto fail;
2799 }
2800
2801 if (sn9c102_init(cam)) {
a966f3e7 2802 DBG(1, "Initialization failed. I will retry on open().");
1da177e4
LT		 2803 cam->state |= DEV_MISCONFIGURED;
2804 }
2805
2806 strcpy(cam->v4ldev->name, "SN9C10x PC Camera");
2807 cam->v4ldev->owner = THIS_MODULE;
2808 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
2809 cam->v4ldev->hardware = VID_HARDWARE_SN9C102;
2810 cam->v4ldev->fops = &sn9c102_fops;
2811 cam->v4ldev->minor = video_nr[dev_nr];
2812 cam->v4ldev->release = video_device_release;
2813 video_set_drvdata(cam->v4ldev, cam);
2814
2815 down(&cam->dev_sem);
2816
2817 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2818 video_nr[dev_nr]);
2819 if (err) {
a966f3e7 2820 DBG(1, "V4L2 device registration failed");
1da177e4 2821 if (err == -ENFILE && video_nr[dev_nr] == -1)
a966f3e7 2822 DBG(1, "Free /dev/videoX node not found");
1da177e4
LT		 2823 video_nr[dev_nr] = -1;
2824 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
2825 up(&cam->dev_sem);
2826 goto fail;
2827 }
2828
a966f3e7 2829 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
1da177e4
LT		 2830
2831 cam->module_param.force_munmap = force_munmap[dev_nr];
2832
2833 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
2834
2835 sn9c102_create_sysfs(cam);
a966f3e7 2836 DBG(2, "Optional device control through 'sysfs' interface ready");
1da177e4
LT		 2837
2838 usb_set_intfdata(intf, cam);
2839
2840 up(&cam->dev_sem);
2841
2842 return 0;
2843
2844fail:
2845 if (cam) {
2846 kfree(cam->control_buffer);
2847 if (cam->v4ldev)
2848 video_device_release(cam->v4ldev);
2849 kfree(cam);
2850 }
2851 return err;
2852}
2853
2854
2855static void sn9c102_usb_disconnect(struct usb_interface* intf)
2856{
2857 struct sn9c102_device* cam = usb_get_intfdata(intf);
2858
2859 if (!cam)
2860 return;
2861
2862 down_write(&sn9c102_disconnect);
2863
2864 down(&cam->dev_sem);
2865
a966f3e7 2866 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
1da177e4
LT		 2867
2868 wake_up_interruptible_all(&cam->open);
2869
2870 if (cam->users) {
2871 DBG(2, "Device /dev/video%d is open! Deregistration and "
2872 "memory deallocation are deferred on close.",
a966f3e7 2873 cam->v4ldev->minor);
1da177e4
LT		 2874 cam->state |= DEV_MISCONFIGURED;
2875 sn9c102_stop_transfer(cam);
2876 cam->state |= DEV_DISCONNECTED;
2877 wake_up_interruptible(&cam->wait_frame);
2878 wake_up_interruptible(&cam->wait_stream);
2879 } else {
2880 cam->state |= DEV_DISCONNECTED;
2881 sn9c102_release_resources(cam);
2882 }
2883
2884 up(&cam->dev_sem);
2885
2886 if (!cam->users)
2887 kfree(cam);
2888
2889 up_write(&sn9c102_disconnect);
2890}
2891
2892
2893static struct usb_driver sn9c102_usb_driver = {
1da177e4
LT		 2894 .name = "sn9c102",
2895 .id_table = sn9c102_id_table,
2896 .probe = sn9c102_usb_probe,
2897 .disconnect = sn9c102_usb_disconnect,
2898};
2899
2900/*****************************************************************************/
2901
2902static int __init sn9c102_module_init(void)
2903{
2904 int err = 0;
2905
a966f3e7
LR		 2906 KDBG(2, SN9C102_MODULE_NAME " v" SN9C102_MODULE_VERSION);
2907 KDBG(3, SN9C102_MODULE_AUTHOR);
1da177e4
LT		 2908
2909 if ((err = usb_register(&sn9c102_usb_driver)))
a966f3e7 2910 KDBG(1, "usb_register() failed");
1da177e4
LT		 2911
2912 return err;
2913}
2914
2915
2916static void __exit sn9c102_module_exit(void)
2917{
2918 usb_deregister(&sn9c102_usb_driver);
2919}
2920
2921
2922module_init(sn9c102_module_init);
2923module_exit(sn9c102_module_exit);
kernel source for telekom puls (alcatel/mediatek)