1 /***************************************************************************
2 * V4L2 driver for SN9C1xx PC Camera Controllers *
4 * Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it> *
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. *
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. *
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 ***************************************************************************/
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/param.h>
25 #include <linux/errno.h>
26 #include <linux/slab.h>
27 #include <linux/device.h>
29 #include <linux/delay.h>
30 #include <linux/compiler.h>
31 #include <linux/ioctl.h>
32 #include <linux/poll.h>
33 #include <linux/stat.h>
35 #include <linux/vmalloc.h>
36 #include <linux/version.h>
37 #include <linux/page-flags.h>
38 #include <asm/byteorder.h>
40 #include <asm/uaccess.h>
44 /*****************************************************************************/
46 #define SN9C102_MODULE_NAME "V4L2 driver for SN9C1xx PC Camera Controllers"
47 #define SN9C102_MODULE_ALIAS "sn9c1xx"
48 #define SN9C102_MODULE_AUTHOR "(C) 2004-2007 Luca Risolia"
49 #define SN9C102_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
50 #define SN9C102_MODULE_LICENSE "GPL"
51 #define SN9C102_MODULE_VERSION "1:1.48"
53 /*****************************************************************************/
55 MODULE_DEVICE_TABLE(usb, sn9c102_id_table);
57 MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL);
58 MODULE_DESCRIPTION(SN9C102_MODULE_NAME);
59 MODULE_ALIAS(SN9C102_MODULE_ALIAS);
60 MODULE_VERSION(SN9C102_MODULE_VERSION);
61 MODULE_LICENSE(SN9C102_MODULE_LICENSE);
63 static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1};
64 module_param_array(video_nr, short, NULL, 0444);
65 MODULE_PARM_DESC(video_nr,
67 "\nSpecify V4L2 minor mode number."
68 "\n-1 = use next available (default)"
69 "\n n = use minor number n (integer >= 0)"
70 "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES)
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."
78 static bool force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] =
79 SN9C102_FORCE_MUNMAP};
80 module_param_array(force_munmap, bool, NULL, 0444);
81 MODULE_PARM_DESC(force_munmap,
83 "\nForce the application to unmap previously"
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"
88 "\n0 = do not force memory unmapping"
89 "\n1 = force memory unmapping (save memory)"
90 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
93 static unsigned int frame_timeout[] = {[0 ... SN9C102_MAX_DEVICES-1] =
94 SN9C102_FRAME_TIMEOUT};
95 module_param_array(frame_timeout, uint, NULL, 0644);
96 MODULE_PARM_DESC(frame_timeout,
98 "\nTimeout for a video frame in seconds before"
99 "\nreturning an I/O error; 0 for infinity."
100 "\nThis parameter is specific for each detected camera."
101 "\nDefault value is "__MODULE_STRING(SN9C102_FRAME_TIMEOUT)"."
105 static unsigned short debug = SN9C102_DEBUG_LEVEL;
106 module_param(debug, ushort, 0644);
107 MODULE_PARM_DESC(debug,
109 "\nDebugging information level, from 0 to 3:"
110 "\n0 = none (use carefully)"
111 "\n1 = critical errors"
112 "\n2 = significant informations"
113 "\n3 = more verbose messages"
114 "\nLevel 3 is useful for testing only."
115 "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"."
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.
124 static 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 */
139 /*****************************************************************************/
142 sn9c102_request_buffers(struct sn9c102_device* cam, u32 count,
143 enum sn9c102_io_method io)
145 struct v4l2_pix_format* p = &(cam->sensor.pix_format);
146 struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
147 size_t imagesize = cam->module_param.force_munmap || io == IO_READ ?
148 (p->width * p->height * p->priv) / 8 :
149 (r->width * r->height * p->priv) / 8;
153 if (count > SN9C102_MAX_FRAMES)
154 count = SN9C102_MAX_FRAMES;
156 if (cam->bridge == BRIDGE_SN9C105 || cam->bridge == BRIDGE_SN9C120)
157 imagesize += 589 + 2; /* length of JPEG header + EOI marker */
159 cam->nbuffers = count;
160 while (cam->nbuffers > 0) {
161 if ((buff = vmalloc_32_user(cam->nbuffers *
162 PAGE_ALIGN(imagesize))))
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;
179 return cam->nbuffers;
183 static void sn9c102_release_buffers(struct sn9c102_device* cam)
186 vfree(cam->frame[0].bufmem);
189 cam->frame_current = NULL;
193 static void sn9c102_empty_framequeues(struct sn9c102_device* cam)
197 INIT_LIST_HEAD(&cam->inqueue);
198 INIT_LIST_HEAD(&cam->outqueue);
200 for (i = 0; i < SN9C102_MAX_FRAMES; i++) {
201 cam->frame[i].state = F_UNUSED;
202 cam->frame[i].buf.bytesused = 0;
207 static void sn9c102_requeue_outqueue(struct sn9c102_device* cam)
209 struct sn9c102_frame_t *i;
211 list_for_each_entry(i, &cam->outqueue, frame) {
213 list_add(&i->frame, &cam->inqueue);
216 INIT_LIST_HEAD(&cam->outqueue);
220 static void sn9c102_queue_unusedframes(struct sn9c102_device* cam)
222 unsigned long lock_flags;
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);
234 /*****************************************************************************/
237 Write a sequence of count value/register pairs. Returns -1 after the first
238 failed write, or 0 for no errors.
240 int sn9c102_write_regs(struct sn9c102_device* cam, const u8 valreg[][2],
243 struct usb_device* udev = cam->usbdev;
244 u8* buff = cam->control_buffer;
247 for (i = 0; i < count; i++) {
248 u8 index = valreg[i][1];
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.
257 *buff = valreg[i][0];
259 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08,
260 0x41, index, 0, buff, 1,
261 SN9C102_CTRL_TIMEOUT);
264 DBG(3, "Failed to write a register (value 0x%02X, "
265 "index 0x%02X, error %d)", *buff, index, res);
269 cam->reg[index] = *buff;
276 int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index)
278 struct usb_device* udev = cam->usbdev;
279 u8* buff = cam->control_buffer;
282 if (index >= ARRAY_SIZE(cam->reg))
287 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
288 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
290 DBG(3, "Failed to write a register (value 0x%02X, index "
291 "0x%02X, error %d)", value, index, res);
295 cam->reg[index] = value;
301 /* NOTE: with the SN9C10[123] reading some registers always returns 0 */
302 int sn9c102_read_reg(struct sn9c102_device* cam, u16 index)
304 struct usb_device* udev = cam->usbdev;
305 u8* buff = cam->control_buffer;
308 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
309 index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
311 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
314 return (res >= 0) ? (int)(*buff) : -1;
318 int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index)
320 if (index >= ARRAY_SIZE(cam->reg))
323 return cam->reg[index];
328 sn9c102_i2c_wait(struct sn9c102_device* cam,
329 const struct sn9c102_sensor* sensor)
333 for (i = 1; i <= 5; i++) {
334 r = sn9c102_read_reg(cam, 0x08);
339 if (sensor->frequency & SN9C102_I2C_400KHZ)
349 sn9c102_i2c_detect_read_error(struct sn9c102_device* cam,
350 const struct sn9c102_sensor* sensor)
354 r = sn9c102_read_reg(cam, 0x08);
358 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
366 return err ? -EIO : 0;
371 sn9c102_i2c_detect_write_error(struct sn9c102_device* cam,
372 const struct sn9c102_sensor* sensor)
375 r = sn9c102_read_reg(cam, 0x08);
376 return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0;
381 sn9c102_i2c_try_raw_read(struct sn9c102_device* cam,
382 const struct sn9c102_sensor* sensor, u8 data0,
383 u8 data1, u8 n, u8 buffer[])
385 struct usb_device* udev = cam->usbdev;
386 u8* data = cam->control_buffer;
387 int i = 0, err = 0, res;
390 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
391 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10;
392 data[1] = data0; /* I2C slave id */
393 data[2] = data1; /* address */
395 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
396 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
400 err += sn9c102_i2c_wait(cam, sensor);
402 /* Read cycle - n bytes */
403 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
404 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) |
408 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
409 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
413 err += sn9c102_i2c_wait(cam, sensor);
415 /* The first read byte will be placed in data[4] */
416 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
417 0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT);
421 err += sn9c102_i2c_detect_read_error(cam, sensor);
423 PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1,
427 DBG(3, "I2C read failed for %s image sensor", sensor->name);
432 for (i = 0; i < n && i < 5; i++)
433 buffer[n-i-1] = data[4-i];
440 sn9c102_i2c_try_raw_write(struct sn9c102_device* cam,
441 const struct sn9c102_sensor* sensor, u8 n, u8 data0,
442 u8 data1, u8 data2, u8 data3, u8 data4, u8 data5)
444 struct usb_device* udev = cam->usbdev;
445 u8* data = cam->control_buffer;
448 /* Write cycle. It usually is address + value */
449 data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
450 ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0)
459 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
460 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
464 err += sn9c102_i2c_wait(cam, sensor);
465 err += sn9c102_i2c_detect_write_error(cam, sensor);
468 DBG(3, "I2C write failed for %s image sensor", sensor->name);
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",
472 n, data0, data1, data2, data3, data4, data5);
479 sn9c102_i2c_try_read(struct sn9c102_device* cam,
480 const struct sn9c102_sensor* sensor, u8 address)
482 return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id,
487 static int sn9c102_i2c_try_write(struct sn9c102_device* cam,
488 const struct sn9c102_sensor* sensor,
489 u8 address, u8 value)
491 return sn9c102_i2c_try_raw_write(cam, sensor, 3,
492 sensor->i2c_slave_id, address,
497 int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address)
499 return sn9c102_i2c_try_read(cam, &cam->sensor, address);
503 int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value)
505 return sn9c102_i2c_try_write(cam, &cam->sensor, address, value);
508 /*****************************************************************************/
510 static size_t sn9c102_sof_length(struct sn9c102_device* cam)
512 switch (cam->bridge) {
528 sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len)
530 static const char marker[6] = {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96};
532 size_t soflen = 0, i, j;
534 soflen = sn9c102_sof_length(cam);
536 for (i = 0; i < len; i++) {
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;
549 /* Search for the SOF marker (fixed part) in the header */
550 for (j = 0, b=cam->sof.bytesread; j+b < sizeof(marker); j++) {
551 if (unlikely(i+j == len))
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);
562 cam->sof.bytesread = 0;
573 sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len)
575 static const u8 eof_header[4][4] = {
576 {0x00, 0x00, 0x00, 0x00},
577 {0x40, 0x00, 0x00, 0x00},
578 {0x80, 0x00, 0x00, 0x00},
579 {0xc0, 0x00, 0x00, 0x00},
583 /* The EOF header does not exist in compressed data */
584 if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
585 cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
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
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))
603 sn9c102_write_jpegheader(struct sn9c102_device* cam, struct sn9c102_frame_t* f)
605 static const u8 jpeg_header[589] = {
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
668 memcpy(pos, jpeg_header, sizeof(jpeg_header));
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);
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;
684 f->buf.bytesused += sizeof(jpeg_header);
688 static void sn9c102_urb_complete(struct urb *urb)
690 struct sn9c102_device* cam = urb->context;
691 struct sn9c102_frame_t** f;
692 size_t imagesize, soflen;
696 if (urb->status == -ENOENT)
699 f = &cam->frame_current;
701 if (cam->stream == STREAM_INTERRUPT) {
702 cam->stream = STREAM_OFF;
704 (*f)->state = F_QUEUED;
705 cam->sof.bytesread = 0;
706 DBG(3, "Stream interrupted by application");
707 wake_up(&cam->wait_stream);
710 if (cam->state & DEV_DISCONNECTED)
713 if (cam->state & DEV_MISCONFIGURED) {
714 wake_up_interruptible(&cam->wait_frame);
718 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
722 (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t,
725 imagesize = (cam->sensor.pix_format.width *
726 cam->sensor.pix_format.height *
727 cam->sensor.pix_format.priv) / 8;
728 if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
729 imagesize += 589; /* length of jpeg header */
730 soflen = sn9c102_sof_length(cam);
732 for (i = 0; i < urb->number_of_packets; i++) {
733 unsigned int img, len, status;
734 void *pos, *sof, *eof;
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;
741 DBG(3, "Error in isochronous frame");
742 (*f)->state = F_ERROR;
743 cam->sof.bytesread = 0;
747 PDBGG("Isochrnous frame: length %u, #%u i", len, i);
750 sof = sn9c102_find_sof_header(cam, pos, len);
752 eof = sn9c102_find_eof_header(cam, pos, len);
753 if ((*f)->state == F_GRABBING) {
758 img = (eof > pos) ? eof - pos - 1 : 0;
760 if ((*f)->buf.bytesused + img > imagesize) {
762 b = (*f)->buf.bytesused + img -
764 img = imagesize - (*f)->buf.bytesused;
765 PDBGG("Expected EOF not found: video "
768 DBG(3, "Exceeded limit: +%u "
769 "bytes", (unsigned)(b));
772 memcpy((*f)->bufmem + (*f)->buf.bytesused, pos,
775 if ((*f)->buf.bytesused == 0)
776 do_gettimeofday(&(*f)->buf.timestamp);
778 (*f)->buf.bytesused += img;
780 if ((*f)->buf.bytesused == imagesize ||
781 ((cam->sensor.pix_format.pixelformat ==
782 V4L2_PIX_FMT_SN9C10X ||
783 cam->sensor.pix_format.pixelformat ==
784 V4L2_PIX_FMT_JPEG) && eof)) {
787 b = (*f)->buf.bytesused;
788 (*f)->state = F_DONE;
789 (*f)->buf.sequence= ++cam->frame_count;
791 spin_lock(&cam->queue_lock);
792 list_move_tail(&(*f)->frame,
794 if (!list_empty(&cam->inqueue))
797 struct sn9c102_frame_t,
801 spin_unlock(&cam->queue_lock);
803 memcpy(cam->sysfs.frame_header,
804 cam->sof.header, soflen);
806 DBG(3, "Video frame captured: %lu "
807 "bytes", (unsigned long)(b));
813 (*f)->state = F_ERROR;
814 DBG(3, "Not expected EOF after %lu "
815 "bytes of image data",
817 ((*f)->buf.bytesused));
824 DBG(3, "EOF without SOF");
828 PDBGG("Ignoring pointless isochronous frame");
832 } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) {
834 (*f)->state = F_GRABBING;
835 (*f)->buf.bytesused = 0;
838 if (cam->sensor.pix_format.pixelformat ==
840 sn9c102_write_jpegheader(cam, (*f));
841 DBG(3, "SOF detected: new video frame");
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) */
850 if (cam->sensor.pix_format.pixelformat ==
851 V4L2_PIX_FMT_SN9C10X ||
852 cam->sensor.pix_format.pixelformat ==
854 if (sof - pos >= soflen) {
856 } else { /* remove header */
858 (*f)->buf.bytesused -=
859 (soflen - (sof - pos));
863 DBG(3, "SOF before expected EOF after "
864 "%lu bytes of image data",
866 ((*f)->buf.bytesused));
874 urb->dev = cam->usbdev;
875 err = usb_submit_urb(urb, GFP_ATOMIC);
876 if (err < 0 && err != -EPERM) {
877 cam->state |= DEV_MISCONFIGURED;
878 DBG(1, "usb_submit_urb() failed");
881 wake_up_interruptible(&cam->wait_frame);
885 static int sn9c102_start_transfer(struct sn9c102_device* cam)
887 struct usb_device *udev = cam->usbdev;
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);
897 for (i = 0; i < SN9C102_URBS; i++) {
898 cam->transfer_buffer[i] = kzalloc(SN9C102_ISO_PACKETS * psz,
900 if (!cam->transfer_buffer[i]) {
902 DBG(1, "Not enough memory");
907 for (i = 0; i < SN9C102_URBS; i++) {
908 urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL);
912 DBG(1, "usb_alloc_urb() failed");
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;
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;
931 if (!(cam->reg[0x01] & 0x04)) {
932 err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01);
935 DBG(1, "I/O hardware error");
940 err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING);
942 DBG(1, "usb_set_interface() failed");
946 cam->frame_current = NULL;
947 cam->sof.bytesread = 0;
949 for (i = 0; i < SN9C102_URBS; i++) {
950 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
952 for (j = i-1; j >= 0; j--)
953 usb_kill_urb(cam->urb[j]);
954 DBG(1, "usb_submit_urb() failed, error %d", err);
962 for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++)
963 usb_free_urb(cam->urb[i]);
966 for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++)
967 kfree(cam->transfer_buffer[i]);
973 static int sn9c102_stop_transfer(struct sn9c102_device* cam)
975 struct usb_device *udev = cam->usbdev;
979 if (cam->state & DEV_DISCONNECTED)
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]);
988 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
990 DBG(3, "usb_set_interface() failed");
996 static int sn9c102_stream_interrupt(struct sn9c102_device* cam)
998 cam->stream = STREAM_INTERRUPT;
999 wait_event_timeout(cam->wait_stream,
1000 (cam->stream == STREAM_OFF) ||
1001 (cam->state & DEV_DISCONNECTED),
1002 SN9C102_URB_TIMEOUT);
1003 if (cam->state & DEV_DISCONNECTED)
1005 else if (cam->stream != STREAM_OFF) {
1006 cam->state |= DEV_MISCONFIGURED;
1007 DBG(1, "URB timeout reached. The camera is misconfigured. "
1008 "To use it, close and open %s again.",
1009 video_device_node_name(cam->v4ldev));
1016 /*****************************************************************************/
1018 #ifdef CONFIG_VIDEO_ADV_DEBUG
1019 static u16 sn9c102_strtou16(const char* buff, size_t len, ssize_t* count)
1026 strncpy(str, buff, len);
1029 strncpy(str, buff, 6);
1033 val = simple_strtoul(str, &endp, 0);
1037 *count = (ssize_t)(endp - str);
1038 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
1045 NOTE 1: being inside one of the following methods implies that the v4l
1046 device exists for sure (see kobjects and reference counters)
1047 NOTE 2: buffers are PAGE_SIZE long
1050 static ssize_t sn9c102_show_reg(struct device* cd,
1051 struct device_attribute *attr, char* buf)
1053 struct sn9c102_device* cam;
1056 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1057 return -ERESTARTSYS;
1059 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1061 mutex_unlock(&sn9c102_sysfs_lock);
1065 count = sprintf(buf, "%u\n", cam->sysfs.reg);
1067 mutex_unlock(&sn9c102_sysfs_lock);
1074 sn9c102_store_reg(struct device* cd, struct device_attribute *attr,
1075 const char* buf, size_t len)
1077 struct sn9c102_device* cam;
1081 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1082 return -ERESTARTSYS;
1084 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1086 mutex_unlock(&sn9c102_sysfs_lock);
1090 index = sn9c102_strtou16(buf, len, &count);
1091 if (index >= ARRAY_SIZE(cam->reg) || !count) {
1092 mutex_unlock(&sn9c102_sysfs_lock);
1096 cam->sysfs.reg = index;
1098 DBG(2, "Moved SN9C1XX register index to 0x%02X", cam->sysfs.reg);
1099 DBG(3, "Written bytes: %zd", count);
1101 mutex_unlock(&sn9c102_sysfs_lock);
1107 static ssize_t sn9c102_show_val(struct device* cd,
1108 struct device_attribute *attr, char* buf)
1110 struct sn9c102_device* cam;
1114 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1115 return -ERESTARTSYS;
1117 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1119 mutex_unlock(&sn9c102_sysfs_lock);
1123 if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) {
1124 mutex_unlock(&sn9c102_sysfs_lock);
1128 count = sprintf(buf, "%d\n", val);
1130 DBG(3, "Read bytes: %zd, value: %d", count, val);
1132 mutex_unlock(&sn9c102_sysfs_lock);
1139 sn9c102_store_val(struct device* cd, struct device_attribute *attr,
1140 const char* buf, size_t len)
1142 struct sn9c102_device* cam;
1147 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1148 return -ERESTARTSYS;
1150 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1152 mutex_unlock(&sn9c102_sysfs_lock);
1156 value = sn9c102_strtou16(buf, len, &count);
1158 mutex_unlock(&sn9c102_sysfs_lock);
1162 err = sn9c102_write_reg(cam, value, cam->sysfs.reg);
1164 mutex_unlock(&sn9c102_sysfs_lock);
1168 DBG(2, "Written SN9C1XX reg. 0x%02X, val. 0x%02X",
1169 cam->sysfs.reg, value);
1170 DBG(3, "Written bytes: %zd", count);
1172 mutex_unlock(&sn9c102_sysfs_lock);
1178 static ssize_t sn9c102_show_i2c_reg(struct device* cd,
1179 struct device_attribute *attr, char* buf)
1181 struct sn9c102_device* cam;
1184 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1185 return -ERESTARTSYS;
1187 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1189 mutex_unlock(&sn9c102_sysfs_lock);
1193 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
1195 DBG(3, "Read bytes: %zd", count);
1197 mutex_unlock(&sn9c102_sysfs_lock);
1204 sn9c102_store_i2c_reg(struct device* cd, struct device_attribute *attr,
1205 const char* buf, size_t len)
1207 struct sn9c102_device* cam;
1211 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1212 return -ERESTARTSYS;
1214 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1216 mutex_unlock(&sn9c102_sysfs_lock);
1220 index = sn9c102_strtou16(buf, len, &count);
1222 mutex_unlock(&sn9c102_sysfs_lock);
1226 cam->sysfs.i2c_reg = index;
1228 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
1229 DBG(3, "Written bytes: %zd", count);
1231 mutex_unlock(&sn9c102_sysfs_lock);
1237 static ssize_t sn9c102_show_i2c_val(struct device* cd,
1238 struct device_attribute *attr, char* buf)
1240 struct sn9c102_device* cam;
1244 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1245 return -ERESTARTSYS;
1247 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1249 mutex_unlock(&sn9c102_sysfs_lock);
1253 if (!(cam->sensor.sysfs_ops & SN9C102_I2C_READ)) {
1254 mutex_unlock(&sn9c102_sysfs_lock);
1258 if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
1259 mutex_unlock(&sn9c102_sysfs_lock);
1263 count = sprintf(buf, "%d\n", val);
1265 DBG(3, "Read bytes: %zd, value: %d", count, val);
1267 mutex_unlock(&sn9c102_sysfs_lock);
1274 sn9c102_store_i2c_val(struct device* cd, struct device_attribute *attr,
1275 const char* buf, size_t len)
1277 struct sn9c102_device* cam;
1282 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1283 return -ERESTARTSYS;
1285 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1287 mutex_unlock(&sn9c102_sysfs_lock);
1291 if (!(cam->sensor.sysfs_ops & SN9C102_I2C_WRITE)) {
1292 mutex_unlock(&sn9c102_sysfs_lock);
1296 value = sn9c102_strtou16(buf, len, &count);
1298 mutex_unlock(&sn9c102_sysfs_lock);
1302 err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value);
1304 mutex_unlock(&sn9c102_sysfs_lock);
1308 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
1309 cam->sysfs.i2c_reg, value);
1310 DBG(3, "Written bytes: %zd", count);
1312 mutex_unlock(&sn9c102_sysfs_lock);
1319 sn9c102_store_green(struct device* cd, struct device_attribute *attr,
1320 const char* buf, size_t len)
1322 struct sn9c102_device* cam;
1323 enum sn9c102_bridge bridge;
1328 if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1329 return -ERESTARTSYS;
1331 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1333 mutex_unlock(&sn9c102_sysfs_lock);
1337 bridge = cam->bridge;
1339 mutex_unlock(&sn9c102_sysfs_lock);
1341 value = sn9c102_strtou16(buf, len, &count);
1346 case BRIDGE_SN9C101:
1347 case BRIDGE_SN9C102:
1350 if ((res = sn9c102_store_reg(cd, attr, "0x11", 4)) >= 0)
1351 res = sn9c102_store_val(cd, attr, buf, len);
1353 case BRIDGE_SN9C103:
1354 case BRIDGE_SN9C105:
1355 case BRIDGE_SN9C120:
1358 if ((res = sn9c102_store_reg(cd, attr, "0x07", 4)) >= 0)
1359 res = sn9c102_store_val(cd, attr, buf, len);
1368 sn9c102_store_blue(struct device* cd, struct device_attribute *attr,
1369 const char* buf, size_t len)
1375 value = sn9c102_strtou16(buf, len, &count);
1376 if (!count || value > 0x7f)
1379 if ((res = sn9c102_store_reg(cd, attr, "0x06", 4)) >= 0)
1380 res = sn9c102_store_val(cd, attr, buf, len);
1387 sn9c102_store_red(struct device* cd, struct device_attribute *attr,
1388 const char* buf, size_t len)
1394 value = sn9c102_strtou16(buf, len, &count);
1395 if (!count || value > 0x7f)
1398 if ((res = sn9c102_store_reg(cd, attr, "0x05", 4)) >= 0)
1399 res = sn9c102_store_val(cd, attr, buf, len);
1405 static ssize_t sn9c102_show_frame_header(struct device* cd,
1406 struct device_attribute *attr,
1409 struct sn9c102_device* cam;
1412 cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1416 count = sizeof(cam->sysfs.frame_header);
1417 memcpy(buf, cam->sysfs.frame_header, count);
1419 DBG(3, "Frame header, read bytes: %zd", count);
1425 static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR, sn9c102_show_reg, sn9c102_store_reg);
1426 static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, sn9c102_show_val, sn9c102_store_val);
1427 static DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
1428 sn9c102_show_i2c_reg, sn9c102_store_i2c_reg);
1429 static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
1430 sn9c102_show_i2c_val, sn9c102_store_i2c_val);
1431 static DEVICE_ATTR(green, S_IWUSR, NULL, sn9c102_store_green);
1432 static DEVICE_ATTR(blue, S_IWUSR, NULL, sn9c102_store_blue);
1433 static DEVICE_ATTR(red, S_IWUSR, NULL, sn9c102_store_red);
1434 static DEVICE_ATTR(frame_header, S_IRUGO, sn9c102_show_frame_header, NULL);
1437 static int sn9c102_create_sysfs(struct sn9c102_device* cam)
1439 struct device *dev = &(cam->v4ldev->dev);
1442 if ((err = device_create_file(dev, &dev_attr_reg)))
1444 if ((err = device_create_file(dev, &dev_attr_val)))
1446 if ((err = device_create_file(dev, &dev_attr_frame_header)))
1449 if (cam->sensor.sysfs_ops) {
1450 if ((err = device_create_file(dev, &dev_attr_i2c_reg)))
1451 goto err_frame_header;
1452 if ((err = device_create_file(dev, &dev_attr_i2c_val)))
1456 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
1457 if ((err = device_create_file(dev, &dev_attr_green)))
1460 if ((err = device_create_file(dev, &dev_attr_blue)))
1462 if ((err = device_create_file(dev, &dev_attr_red)))
1469 device_remove_file(dev, &dev_attr_blue);
1471 if (cam->sensor.sysfs_ops)
1472 device_remove_file(dev, &dev_attr_i2c_val);
1474 if (cam->sensor.sysfs_ops)
1475 device_remove_file(dev, &dev_attr_i2c_reg);
1477 device_remove_file(dev, &dev_attr_frame_header);
1479 device_remove_file(dev, &dev_attr_val);
1481 device_remove_file(dev, &dev_attr_reg);
1485 #endif /* CONFIG_VIDEO_ADV_DEBUG */
1487 /*****************************************************************************/
1490 sn9c102_set_pix_format(struct sn9c102_device* cam, struct v4l2_pix_format* pix)
1494 if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
1495 pix->pixelformat == V4L2_PIX_FMT_JPEG) {
1496 switch (cam->bridge) {
1497 case BRIDGE_SN9C101:
1498 case BRIDGE_SN9C102:
1499 case BRIDGE_SN9C103:
1500 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1503 case BRIDGE_SN9C105:
1504 case BRIDGE_SN9C120:
1505 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1510 switch (cam->bridge) {
1511 case BRIDGE_SN9C101:
1512 case BRIDGE_SN9C102:
1513 case BRIDGE_SN9C103:
1514 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1517 case BRIDGE_SN9C105:
1518 case BRIDGE_SN9C120:
1519 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1525 return err ? -EIO : 0;
1530 sn9c102_set_compression(struct sn9c102_device* cam,
1531 struct v4l2_jpegcompression* compression)
1535 switch (cam->bridge) {
1536 case BRIDGE_SN9C101:
1537 case BRIDGE_SN9C102:
1538 case BRIDGE_SN9C103:
1539 if (compression->quality == 0)
1540 err += sn9c102_write_reg(cam, cam->reg[0x17] | 0x01,
1542 else if (compression->quality == 1)
1543 err += sn9c102_write_reg(cam, cam->reg[0x17] & 0xfe,
1546 case BRIDGE_SN9C105:
1547 case BRIDGE_SN9C120:
1548 if (compression->quality == 0) {
1549 for (i = 0; i <= 63; i++) {
1550 err += sn9c102_write_reg(cam,
1551 SN9C102_Y_QTABLE1[i],
1553 err += sn9c102_write_reg(cam,
1554 SN9C102_UV_QTABLE1[i],
1557 err += sn9c102_write_reg(cam, cam->reg[0x18] & 0xbf,
1559 } else if (compression->quality == 1) {
1560 for (i = 0; i <= 63; i++) {
1561 err += sn9c102_write_reg(cam,
1562 SN9C102_Y_QTABLE1[i],
1564 err += sn9c102_write_reg(cam,
1565 SN9C102_UV_QTABLE1[i],
1568 err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x40,
1574 return err ? -EIO : 0;
1578 static int sn9c102_set_scale(struct sn9c102_device* cam, u8 scale)
1584 r = cam->reg[0x18] & 0xcf;
1585 else if (scale == 2) {
1586 r = cam->reg[0x18] & 0xcf;
1588 } else if (scale == 4)
1589 r = cam->reg[0x18] | 0x20;
1591 err += sn9c102_write_reg(cam, r, 0x18);
1595 PDBGG("Scaling factor: %u", scale);
1601 static int sn9c102_set_crop(struct sn9c102_device* cam, struct v4l2_rect* rect)
1603 struct sn9c102_sensor* s = &cam->sensor;
1604 u8 h_start = (u8)(rect->left - s->cropcap.bounds.left),
1605 v_start = (u8)(rect->top - s->cropcap.bounds.top),
1606 h_size = (u8)(rect->width / 16),
1607 v_size = (u8)(rect->height / 16);
1610 err += sn9c102_write_reg(cam, h_start, 0x12);
1611 err += sn9c102_write_reg(cam, v_start, 0x13);
1612 err += sn9c102_write_reg(cam, h_size, 0x15);
1613 err += sn9c102_write_reg(cam, v_size, 0x16);
1617 PDBGG("h_start, v_start, h_size, v_size, ho_size, vo_size "
1618 "%u %u %u %u", h_start, v_start, h_size, v_size);
1624 static int sn9c102_init(struct sn9c102_device* cam)
1626 struct sn9c102_sensor* s = &cam->sensor;
1627 struct v4l2_control ctrl;
1628 struct v4l2_queryctrl *qctrl;
1629 struct v4l2_rect* rect;
1633 if (!(cam->state & DEV_INITIALIZED)) {
1634 mutex_init(&cam->open_mutex);
1635 init_waitqueue_head(&cam->wait_open);
1637 rect = &(s->cropcap.defrect);
1638 } else { /* use current values */
1643 err += sn9c102_set_scale(cam, rect->width / s->pix_format.width);
1644 err += sn9c102_set_crop(cam, rect);
1651 DBG(3, "Sensor initialization failed");
1656 if (!(cam->state & DEV_INITIALIZED))
1657 if (cam->bridge == BRIDGE_SN9C101 ||
1658 cam->bridge == BRIDGE_SN9C102 ||
1659 cam->bridge == BRIDGE_SN9C103) {
1660 if (s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
1661 s->pix_format.pixelformat= V4L2_PIX_FMT_SBGGR8;
1662 cam->compression.quality = cam->reg[0x17] & 0x01 ?
1665 if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X)
1666 s->pix_format.pixelformat = V4L2_PIX_FMT_JPEG;
1667 cam->compression.quality = cam->reg[0x18] & 0x40 ?
1669 err += sn9c102_set_compression(cam, &cam->compression);
1672 err += sn9c102_set_compression(cam, &cam->compression);
1673 err += sn9c102_set_pix_format(cam, &s->pix_format);
1674 if (s->set_pix_format)
1675 err += s->set_pix_format(cam, &s->pix_format);
1679 if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
1680 s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
1681 DBG(3, "Compressed video format is active, quality %d",
1682 cam->compression.quality);
1684 DBG(3, "Uncompressed video format is active");
1687 if ((err = s->set_crop(cam, rect))) {
1688 DBG(3, "set_crop() failed");
1693 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1694 if (s->qctrl[i].id != 0 &&
1695 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1696 ctrl.id = s->qctrl[i].id;
1697 ctrl.value = qctrl[i].default_value;
1698 err = s->set_ctrl(cam, &ctrl);
1700 DBG(3, "Set %s control failed",
1704 DBG(3, "Image sensor supports '%s' control",
1709 if (!(cam->state & DEV_INITIALIZED)) {
1710 mutex_init(&cam->fileop_mutex);
1711 spin_lock_init(&cam->queue_lock);
1712 init_waitqueue_head(&cam->wait_frame);
1713 init_waitqueue_head(&cam->wait_stream);
1714 cam->nreadbuffers = 2;
1715 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1716 memcpy(&(s->_rect), &(s->cropcap.defrect),
1717 sizeof(struct v4l2_rect));
1718 cam->state |= DEV_INITIALIZED;
1721 DBG(2, "Initialization succeeded");
1725 /*****************************************************************************/
1727 static void sn9c102_release_resources(struct kref *kref)
1729 struct sn9c102_device *cam;
1731 mutex_lock(&sn9c102_sysfs_lock);
1733 cam = container_of(kref, struct sn9c102_device, kref);
1735 DBG(2, "V4L2 device %s deregistered",
1736 video_device_node_name(cam->v4ldev));
1737 video_set_drvdata(cam->v4ldev, NULL);
1738 video_unregister_device(cam->v4ldev);
1739 usb_put_dev(cam->usbdev);
1740 kfree(cam->control_buffer);
1743 mutex_unlock(&sn9c102_sysfs_lock);
1748 static int sn9c102_open(struct file *filp)
1750 struct sn9c102_device* cam;
1754 A read_trylock() in open() is the only safe way to prevent race
1755 conditions with disconnect(), one close() and multiple (not
1756 necessarily simultaneous) attempts to open(). For example, it
1757 prevents from waiting for a second access, while the device
1758 structure is being deallocated, after a possible disconnect() and
1759 during a following close() holding the write lock: given that, after
1760 this deallocation, no access will be possible anymore, using the
1761 non-trylock version would have let open() gain the access to the
1762 device structure improperly.
1763 For this reason the lock must also not be per-device.
1765 if (!down_read_trylock(&sn9c102_dev_lock))
1766 return -ERESTARTSYS;
1768 cam = video_drvdata(filp);
1770 if (wait_for_completion_interruptible(&cam->probe)) {
1771 up_read(&sn9c102_dev_lock);
1772 return -ERESTARTSYS;
1775 kref_get(&cam->kref);
1778 Make sure to isolate all the simultaneous opens.
1780 if (mutex_lock_interruptible(&cam->open_mutex)) {
1781 kref_put(&cam->kref, sn9c102_release_resources);
1782 up_read(&sn9c102_dev_lock);
1783 return -ERESTARTSYS;
1786 if (cam->state & DEV_DISCONNECTED) {
1787 DBG(1, "Device not present");
1793 DBG(2, "Device %s is already in use",
1794 video_device_node_name(cam->v4ldev));
1795 DBG(3, "Simultaneous opens are not supported");
1797 open() must follow the open flags and should block
1798 eventually while the device is in use.
1800 if ((filp->f_flags & O_NONBLOCK) ||
1801 (filp->f_flags & O_NDELAY)) {
1805 DBG(2, "A blocking open() has been requested. Wait for the "
1806 "device to be released...");
1807 up_read(&sn9c102_dev_lock);
1809 We will not release the "open_mutex" lock, so that only one
1810 process can be in the wait queue below. This way the process
1811 will be sleeping while holding the lock, without losing its
1812 priority after any wake_up().
1814 err = wait_event_interruptible_exclusive(cam->wait_open,
1815 (cam->state & DEV_DISCONNECTED)
1817 down_read(&sn9c102_dev_lock);
1820 if (cam->state & DEV_DISCONNECTED) {
1826 if (cam->state & DEV_MISCONFIGURED) {
1827 err = sn9c102_init(cam);
1829 DBG(1, "Initialization failed again. "
1830 "I will retry on next open().");
1833 cam->state &= ~DEV_MISCONFIGURED;
1836 if ((err = sn9c102_start_transfer(cam)))
1839 filp->private_data = cam;
1842 cam->stream = STREAM_OFF;
1844 cam->frame_count = 0;
1845 sn9c102_empty_framequeues(cam);
1847 DBG(3, "Video device %s is open", video_device_node_name(cam->v4ldev));
1850 mutex_unlock(&cam->open_mutex);
1852 kref_put(&cam->kref, sn9c102_release_resources);
1854 up_read(&sn9c102_dev_lock);
1859 static int sn9c102_release(struct file *filp)
1861 struct sn9c102_device* cam;
1863 down_write(&sn9c102_dev_lock);
1865 cam = video_drvdata(filp);
1867 sn9c102_stop_transfer(cam);
1868 sn9c102_release_buffers(cam);
1870 wake_up_interruptible_nr(&cam->wait_open, 1);
1872 DBG(3, "Video device %s closed", video_device_node_name(cam->v4ldev));
1874 kref_put(&cam->kref, sn9c102_release_resources);
1876 up_write(&sn9c102_dev_lock);
1883 sn9c102_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
1885 struct sn9c102_device *cam = video_drvdata(filp);
1886 struct sn9c102_frame_t* f, * i;
1887 unsigned long lock_flags;
1891 if (mutex_lock_interruptible(&cam->fileop_mutex))
1892 return -ERESTARTSYS;
1894 if (cam->state & DEV_DISCONNECTED) {
1895 DBG(1, "Device not present");
1896 mutex_unlock(&cam->fileop_mutex);
1900 if (cam->state & DEV_MISCONFIGURED) {
1901 DBG(1, "The camera is misconfigured. Close and open it "
1903 mutex_unlock(&cam->fileop_mutex);
1907 if (cam->io == IO_MMAP) {
1908 DBG(3, "Close and open the device again to choose "
1910 mutex_unlock(&cam->fileop_mutex);
1914 if (cam->io == IO_NONE) {
1915 if (!sn9c102_request_buffers(cam,cam->nreadbuffers, IO_READ)) {
1916 DBG(1, "read() failed, not enough memory");
1917 mutex_unlock(&cam->fileop_mutex);
1921 cam->stream = STREAM_ON;
1924 if (list_empty(&cam->inqueue)) {
1925 if (!list_empty(&cam->outqueue))
1926 sn9c102_empty_framequeues(cam);
1927 sn9c102_queue_unusedframes(cam);
1931 mutex_unlock(&cam->fileop_mutex);
1935 if (list_empty(&cam->outqueue)) {
1936 if (filp->f_flags & O_NONBLOCK) {
1937 mutex_unlock(&cam->fileop_mutex);
1940 if (!cam->module_param.frame_timeout) {
1941 err = wait_event_interruptible
1943 (!list_empty(&cam->outqueue)) ||
1944 (cam->state & DEV_DISCONNECTED) ||
1945 (cam->state & DEV_MISCONFIGURED) );
1947 mutex_unlock(&cam->fileop_mutex);
1951 timeout = wait_event_interruptible_timeout
1953 (!list_empty(&cam->outqueue)) ||
1954 (cam->state & DEV_DISCONNECTED) ||
1955 (cam->state & DEV_MISCONFIGURED),
1957 cam->module_param.frame_timeout * 1000
1961 mutex_unlock(&cam->fileop_mutex);
1963 } else if (timeout == 0 &&
1964 !(cam->state & DEV_DISCONNECTED)) {
1965 DBG(1, "Video frame timeout elapsed");
1966 mutex_unlock(&cam->fileop_mutex);
1970 if (cam->state & DEV_DISCONNECTED) {
1971 mutex_unlock(&cam->fileop_mutex);
1974 if (cam->state & DEV_MISCONFIGURED) {
1975 mutex_unlock(&cam->fileop_mutex);
1980 f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame);
1982 if (count > f->buf.bytesused)
1983 count = f->buf.bytesused;
1985 if (copy_to_user(buf, f->bufmem, count)) {
1992 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1993 list_for_each_entry(i, &cam->outqueue, frame)
1994 i->state = F_UNUSED;
1995 INIT_LIST_HEAD(&cam->outqueue);
1996 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1998 sn9c102_queue_unusedframes(cam);
2000 PDBGG("Frame #%lu, bytes read: %zu",
2001 (unsigned long)f->buf.index, count);
2003 mutex_unlock(&cam->fileop_mutex);
2009 static unsigned int sn9c102_poll(struct file *filp, poll_table *wait)
2011 struct sn9c102_device *cam = video_drvdata(filp);
2012 struct sn9c102_frame_t* f;
2013 unsigned long lock_flags;
2014 unsigned int mask = 0;
2016 if (mutex_lock_interruptible(&cam->fileop_mutex))
2019 if (cam->state & DEV_DISCONNECTED) {
2020 DBG(1, "Device not present");
2024 if (cam->state & DEV_MISCONFIGURED) {
2025 DBG(1, "The camera is misconfigured. Close and open it "
2030 if (cam->io == IO_NONE) {
2031 if (!sn9c102_request_buffers(cam, cam->nreadbuffers,
2033 DBG(1, "poll() failed, not enough memory");
2037 cam->stream = STREAM_ON;
2040 if (cam->io == IO_READ) {
2041 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2042 list_for_each_entry(f, &cam->outqueue, frame)
2043 f->state = F_UNUSED;
2044 INIT_LIST_HEAD(&cam->outqueue);
2045 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2046 sn9c102_queue_unusedframes(cam);
2049 poll_wait(filp, &cam->wait_frame, wait);
2051 if (!list_empty(&cam->outqueue))
2052 mask |= POLLIN | POLLRDNORM;
2054 mutex_unlock(&cam->fileop_mutex);
2059 mutex_unlock(&cam->fileop_mutex);
2064 static void sn9c102_vm_open(struct vm_area_struct* vma)
2066 struct sn9c102_frame_t* f = vma->vm_private_data;
2071 static void sn9c102_vm_close(struct vm_area_struct* vma)
2073 /* NOTE: buffers are not freed here */
2074 struct sn9c102_frame_t* f = vma->vm_private_data;
2079 static const struct vm_operations_struct sn9c102_vm_ops = {
2080 .open = sn9c102_vm_open,
2081 .close = sn9c102_vm_close,
2085 static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma)
2087 struct sn9c102_device *cam = video_drvdata(filp);
2088 unsigned long size = vma->vm_end - vma->vm_start,
2089 start = vma->vm_start;
2093 if (mutex_lock_interruptible(&cam->fileop_mutex))
2094 return -ERESTARTSYS;
2096 if (cam->state & DEV_DISCONNECTED) {
2097 DBG(1, "Device not present");
2098 mutex_unlock(&cam->fileop_mutex);
2102 if (cam->state & DEV_MISCONFIGURED) {
2103 DBG(1, "The camera is misconfigured. Close and open it "
2105 mutex_unlock(&cam->fileop_mutex);
2109 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
2110 mutex_unlock(&cam->fileop_mutex);
2114 if (cam->io != IO_MMAP ||
2115 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
2116 mutex_unlock(&cam->fileop_mutex);
2120 for (i = 0; i < cam->nbuffers; i++) {
2121 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
2124 if (i == cam->nbuffers) {
2125 mutex_unlock(&cam->fileop_mutex);
2129 vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
2131 pos = cam->frame[i].bufmem;
2132 while (size > 0) { /* size is page-aligned */
2133 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
2134 mutex_unlock(&cam->fileop_mutex);
2142 vma->vm_ops = &sn9c102_vm_ops;
2143 vma->vm_private_data = &cam->frame[i];
2144 sn9c102_vm_open(vma);
2146 mutex_unlock(&cam->fileop_mutex);
2151 /*****************************************************************************/
2154 sn9c102_vidioc_querycap(struct sn9c102_device* cam, void __user * arg)
2156 struct v4l2_capability cap = {
2157 .driver = "sn9c102",
2158 .version = LINUX_VERSION_CODE,
2159 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
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)
2165 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
2166 sizeof(cap.bus_info));
2168 if (copy_to_user(arg, &cap, sizeof(cap)))
2176 sn9c102_vidioc_enuminput(struct sn9c102_device* cam, void __user * arg)
2178 struct v4l2_input i;
2180 if (copy_from_user(&i, arg, sizeof(i)))
2186 memset(&i, 0, sizeof(i));
2187 strcpy(i.name, "Camera");
2188 i.type = V4L2_INPUT_TYPE_CAMERA;
2189 i.capabilities = V4L2_IN_CAP_STD;
2191 if (copy_to_user(arg, &i, sizeof(i)))
2199 sn9c102_vidioc_g_input(struct sn9c102_device* cam, void __user * arg)
2203 if (copy_to_user(arg, &index, sizeof(index)))
2211 sn9c102_vidioc_s_input(struct sn9c102_device* cam, void __user * arg)
2215 if (copy_from_user(&index, arg, sizeof(index)))
2226 sn9c102_vidioc_query_ctrl(struct sn9c102_device* cam, void __user * arg)
2228 struct sn9c102_sensor* s = &cam->sensor;
2229 struct v4l2_queryctrl qc;
2232 if (copy_from_user(&qc, arg, sizeof(qc)))
2235 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2236 if (qc.id && qc.id == s->qctrl[i].id) {
2237 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
2238 if (copy_to_user(arg, &qc, sizeof(qc)))
2248 sn9c102_vidioc_g_ctrl(struct sn9c102_device* cam, void __user * arg)
2250 struct sn9c102_sensor* s = &cam->sensor;
2251 struct v4l2_control ctrl;
2255 if (!s->get_ctrl && !s->set_ctrl)
2258 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2262 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2263 if (ctrl.id && ctrl.id == s->qctrl[i].id) {
2264 ctrl.value = s->_qctrl[i].default_value;
2269 err = s->get_ctrl(cam, &ctrl);
2272 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
2275 PDBGG("VIDIOC_G_CTRL: id %lu, value %lu",
2276 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2283 sn9c102_vidioc_s_ctrl(struct sn9c102_device* cam, void __user * arg)
2285 struct sn9c102_sensor* s = &cam->sensor;
2286 struct v4l2_control ctrl;
2293 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2296 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) {
2297 if (ctrl.id == s->qctrl[i].id) {
2298 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
2300 if (ctrl.value < s->qctrl[i].minimum ||
2301 ctrl.value > s->qctrl[i].maximum)
2303 ctrl.value -= ctrl.value % s->qctrl[i].step;
2307 if (i == ARRAY_SIZE(s->qctrl))
2309 if ((err = s->set_ctrl(cam, &ctrl)))
2312 s->_qctrl[i].default_value = ctrl.value;
2314 PDBGG("VIDIOC_S_CTRL: id %lu, value %lu",
2315 (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2322 sn9c102_vidioc_cropcap(struct sn9c102_device* cam, void __user * arg)
2324 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
2326 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2327 cc->pixelaspect.numerator = 1;
2328 cc->pixelaspect.denominator = 1;
2330 if (copy_to_user(arg, cc, sizeof(*cc)))
2338 sn9c102_vidioc_g_crop(struct sn9c102_device* cam, void __user * arg)
2340 struct sn9c102_sensor* s = &cam->sensor;
2341 struct v4l2_crop crop = {
2342 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2345 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
2347 if (copy_to_user(arg, &crop, sizeof(crop)))
2355 sn9c102_vidioc_s_crop(struct sn9c102_device* cam, void __user * arg)
2357 struct sn9c102_sensor* s = &cam->sensor;
2358 struct v4l2_crop crop;
2359 struct v4l2_rect* rect;
2360 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2361 struct v4l2_pix_format* pix_format = &(s->pix_format);
2363 const enum sn9c102_stream_state stream = cam->stream;
2364 const u32 nbuffers = cam->nbuffers;
2368 if (copy_from_user(&crop, arg, sizeof(crop)))
2373 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2376 if (cam->module_param.force_munmap)
2377 for (i = 0; i < cam->nbuffers; i++)
2378 if (cam->frame[i].vma_use_count) {
2379 DBG(3, "VIDIOC_S_CROP failed. "
2380 "Unmap the buffers first.");
2384 /* Preserve R,G or B origin */
2385 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
2386 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
2388 if (rect->width < 16)
2390 if (rect->height < 16)
2392 if (rect->width > bounds->width)
2393 rect->width = bounds->width;
2394 if (rect->height > bounds->height)
2395 rect->height = bounds->height;
2396 if (rect->left < bounds->left)
2397 rect->left = bounds->left;
2398 if (rect->top < bounds->top)
2399 rect->top = bounds->top;
2400 if (rect->left + rect->width > bounds->left + bounds->width)
2401 rect->left = bounds->left+bounds->width - rect->width;
2402 if (rect->top + rect->height > bounds->top + bounds->height)
2403 rect->top = bounds->top+bounds->height - rect->height;
2405 rect->width &= ~15L;
2406 rect->height &= ~15L;
2408 if (SN9C102_PRESERVE_IMGSCALE) {
2409 /* Calculate the actual scaling factor */
2411 a = rect->width * rect->height;
2412 b = pix_format->width * pix_format->height;
2413 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2417 if (cam->stream == STREAM_ON)
2418 if ((err = sn9c102_stream_interrupt(cam)))
2421 if (copy_to_user(arg, &crop, sizeof(crop))) {
2422 cam->stream = stream;
2426 if (cam->module_param.force_munmap || cam->io == IO_READ)
2427 sn9c102_release_buffers(cam);
2429 err = sn9c102_set_crop(cam, rect);
2431 err += s->set_crop(cam, rect);
2432 err += sn9c102_set_scale(cam, scale);
2434 if (err) { /* atomic, no rollback in ioctl() */
2435 cam->state |= DEV_MISCONFIGURED;
2436 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
2437 "use the camera, close and open %s again.",
2438 video_device_node_name(cam->v4ldev));
2442 s->pix_format.width = rect->width/scale;
2443 s->pix_format.height = rect->height/scale;
2444 memcpy(&(s->_rect), rect, sizeof(*rect));
2446 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2447 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2448 cam->state |= DEV_MISCONFIGURED;
2449 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
2450 "use the camera, close and open %s again.",
2451 video_device_node_name(cam->v4ldev));
2455 if (cam->io == IO_READ)
2456 sn9c102_empty_framequeues(cam);
2457 else if (cam->module_param.force_munmap)
2458 sn9c102_requeue_outqueue(cam);
2460 cam->stream = stream;
2467 sn9c102_vidioc_enum_framesizes(struct sn9c102_device* cam, void __user * arg)
2469 struct v4l2_frmsizeenum frmsize;
2471 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
2474 if (frmsize.index != 0)
2477 switch (cam->bridge) {
2478 case BRIDGE_SN9C101:
2479 case BRIDGE_SN9C102:
2480 case BRIDGE_SN9C103:
2481 if (frmsize.pixel_format != V4L2_PIX_FMT_SN9C10X &&
2482 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2485 case BRIDGE_SN9C105:
2486 case BRIDGE_SN9C120:
2487 if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG &&
2488 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2493 frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
2494 frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
2495 frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
2496 frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
2497 frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
2498 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
2500 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
2508 sn9c102_vidioc_enum_fmt(struct sn9c102_device* cam, void __user * arg)
2510 struct v4l2_fmtdesc fmtd;
2512 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
2515 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2518 if (fmtd.index == 0) {
2519 strcpy(fmtd.description, "bayer rgb");
2520 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
2521 } else if (fmtd.index == 1) {
2522 switch (cam->bridge) {
2523 case BRIDGE_SN9C101:
2524 case BRIDGE_SN9C102:
2525 case BRIDGE_SN9C103:
2526 strcpy(fmtd.description, "compressed");
2527 fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X;
2529 case BRIDGE_SN9C105:
2530 case BRIDGE_SN9C120:
2531 strcpy(fmtd.description, "JPEG");
2532 fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
2535 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
2539 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2540 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
2542 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
2550 sn9c102_vidioc_g_fmt(struct sn9c102_device* cam, void __user * arg)
2552 struct v4l2_format format;
2553 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
2555 if (copy_from_user(&format, arg, sizeof(format)))
2558 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2561 pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_JPEG) ?
2562 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2563 pfmt->bytesperline = (pfmt->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2564 pfmt->pixelformat == V4L2_PIX_FMT_JPEG)
2565 ? 0 : (pfmt->width * pfmt->priv) / 8;
2566 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
2567 pfmt->field = V4L2_FIELD_NONE;
2568 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
2570 if (copy_to_user(arg, &format, sizeof(format)))
2578 sn9c102_vidioc_try_s_fmt(struct sn9c102_device* cam, unsigned int cmd,
2581 struct sn9c102_sensor* s = &cam->sensor;
2582 struct v4l2_format format;
2583 struct v4l2_pix_format* pix;
2584 struct v4l2_pix_format* pfmt = &(s->pix_format);
2585 struct v4l2_rect* bounds = &(s->cropcap.bounds);
2586 struct v4l2_rect rect;
2588 const enum sn9c102_stream_state stream = cam->stream;
2589 const u32 nbuffers = cam->nbuffers;
2593 if (copy_from_user(&format, arg, sizeof(format)))
2596 pix = &(format.fmt.pix);
2598 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2601 memcpy(&rect, &(s->_rect), sizeof(rect));
2603 { /* calculate the actual scaling factor */
2605 a = rect.width * rect.height;
2606 b = pix->width * pix->height;
2607 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2610 rect.width = scale * pix->width;
2611 rect.height = scale * pix->height;
2613 if (rect.width < 16)
2615 if (rect.height < 16)
2617 if (rect.width > bounds->left + bounds->width - rect.left)
2618 rect.width = bounds->left + bounds->width - rect.left;
2619 if (rect.height > bounds->top + bounds->height - rect.top)
2620 rect.height = bounds->top + bounds->height - rect.top;
2623 rect.height &= ~15L;
2625 { /* adjust the scaling factor */
2627 a = rect.width * rect.height;
2628 b = pix->width * pix->height;
2629 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2632 pix->width = rect.width / scale;
2633 pix->height = rect.height / scale;
2635 switch (cam->bridge) {
2636 case BRIDGE_SN9C101:
2637 case BRIDGE_SN9C102:
2638 case BRIDGE_SN9C103:
2639 if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X &&
2640 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2641 pix->pixelformat = pfmt->pixelformat;
2643 case BRIDGE_SN9C105:
2644 case BRIDGE_SN9C120:
2645 if (pix->pixelformat != V4L2_PIX_FMT_JPEG &&
2646 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2647 pix->pixelformat = pfmt->pixelformat;
2650 pix->priv = pfmt->priv; /* bpp */
2651 pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_JPEG) ?
2652 V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2653 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2654 pix->pixelformat == V4L2_PIX_FMT_JPEG)
2655 ? 0 : (pix->width * pix->priv) / 8;
2656 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2657 pix->field = V4L2_FIELD_NONE;
2659 if (cmd == VIDIOC_TRY_FMT) {
2660 if (copy_to_user(arg, &format, sizeof(format)))
2665 if (cam->module_param.force_munmap)
2666 for (i = 0; i < cam->nbuffers; i++)
2667 if (cam->frame[i].vma_use_count) {
2668 DBG(3, "VIDIOC_S_FMT failed. Unmap the "
2673 if (cam->stream == STREAM_ON)
2674 if ((err = sn9c102_stream_interrupt(cam)))
2677 if (copy_to_user(arg, &format, sizeof(format))) {
2678 cam->stream = stream;
2682 if (cam->module_param.force_munmap || cam->io == IO_READ)
2683 sn9c102_release_buffers(cam);
2685 err += sn9c102_set_pix_format(cam, pix);
2686 err += sn9c102_set_crop(cam, &rect);
2687 if (s->set_pix_format)
2688 err += s->set_pix_format(cam, pix);
2690 err += s->set_crop(cam, &rect);
2691 err += sn9c102_set_scale(cam, scale);
2693 if (err) { /* atomic, no rollback in ioctl() */
2694 cam->state |= DEV_MISCONFIGURED;
2695 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2696 "use the camera, close and open %s again.",
2697 video_device_node_name(cam->v4ldev));
2701 memcpy(pfmt, pix, sizeof(*pix));
2702 memcpy(&(s->_rect), &rect, sizeof(rect));
2704 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2705 nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2706 cam->state |= DEV_MISCONFIGURED;
2707 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2708 "use the camera, close and open %s again.",
2709 video_device_node_name(cam->v4ldev));
2713 if (cam->io == IO_READ)
2714 sn9c102_empty_framequeues(cam);
2715 else if (cam->module_param.force_munmap)
2716 sn9c102_requeue_outqueue(cam);
2718 cam->stream = stream;
2725 sn9c102_vidioc_g_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2727 if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
2735 sn9c102_vidioc_s_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2737 struct v4l2_jpegcompression jc;
2738 const enum sn9c102_stream_state stream = cam->stream;
2741 if (copy_from_user(&jc, arg, sizeof(jc)))
2744 if (jc.quality != 0 && jc.quality != 1)
2747 if (cam->stream == STREAM_ON)
2748 if ((err = sn9c102_stream_interrupt(cam)))
2751 err += sn9c102_set_compression(cam, &jc);
2752 if (err) { /* atomic, no rollback in ioctl() */
2753 cam->state |= DEV_MISCONFIGURED;
2754 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware problems. "
2755 "To use the camera, close and open %s again.",
2756 video_device_node_name(cam->v4ldev));
2760 cam->compression.quality = jc.quality;
2762 cam->stream = stream;
2769 sn9c102_vidioc_reqbufs(struct sn9c102_device* cam, void __user * arg)
2771 struct v4l2_requestbuffers rb;
2775 if (copy_from_user(&rb, arg, sizeof(rb)))
2778 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2779 rb.memory != V4L2_MEMORY_MMAP)
2782 if (cam->io == IO_READ) {
2783 DBG(3, "Close and open the device again to choose the mmap "
2788 for (i = 0; i < cam->nbuffers; i++)
2789 if (cam->frame[i].vma_use_count) {
2790 DBG(3, "VIDIOC_REQBUFS failed. Previous buffers are "
2795 if (cam->stream == STREAM_ON)
2796 if ((err = sn9c102_stream_interrupt(cam)))
2799 sn9c102_empty_framequeues(cam);
2801 sn9c102_release_buffers(cam);
2803 rb.count = sn9c102_request_buffers(cam, rb.count, IO_MMAP);
2805 if (copy_to_user(arg, &rb, sizeof(rb))) {
2806 sn9c102_release_buffers(cam);
2811 cam->io = rb.count ? IO_MMAP : IO_NONE;
2818 sn9c102_vidioc_querybuf(struct sn9c102_device* cam, void __user * arg)
2820 struct v4l2_buffer b;
2822 if (copy_from_user(&b, arg, sizeof(b)))
2825 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2826 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2829 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2831 if (cam->frame[b.index].vma_use_count)
2832 b.flags |= V4L2_BUF_FLAG_MAPPED;
2834 if (cam->frame[b.index].state == F_DONE)
2835 b.flags |= V4L2_BUF_FLAG_DONE;
2836 else if (cam->frame[b.index].state != F_UNUSED)
2837 b.flags |= V4L2_BUF_FLAG_QUEUED;
2839 if (copy_to_user(arg, &b, sizeof(b)))
2847 sn9c102_vidioc_qbuf(struct sn9c102_device* cam, void __user * arg)
2849 struct v4l2_buffer b;
2850 unsigned long lock_flags;
2852 if (copy_from_user(&b, arg, sizeof(b)))
2855 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2856 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2859 if (cam->frame[b.index].state != F_UNUSED)
2862 cam->frame[b.index].state = F_QUEUED;
2864 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2865 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2866 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2868 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2875 sn9c102_vidioc_dqbuf(struct sn9c102_device* cam, struct file* filp,
2878 struct v4l2_buffer b;
2879 struct sn9c102_frame_t *f;
2880 unsigned long lock_flags;
2884 if (copy_from_user(&b, arg, sizeof(b)))
2887 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2890 if (list_empty(&cam->outqueue)) {
2891 if (cam->stream == STREAM_OFF)
2893 if (filp->f_flags & O_NONBLOCK)
2895 if (!cam->module_param.frame_timeout) {
2896 err = wait_event_interruptible
2898 (!list_empty(&cam->outqueue)) ||
2899 (cam->state & DEV_DISCONNECTED) ||
2900 (cam->state & DEV_MISCONFIGURED) );
2904 timeout = wait_event_interruptible_timeout
2906 (!list_empty(&cam->outqueue)) ||
2907 (cam->state & DEV_DISCONNECTED) ||
2908 (cam->state & DEV_MISCONFIGURED),
2909 cam->module_param.frame_timeout *
2910 1000 * msecs_to_jiffies(1) );
2913 else if (timeout == 0 &&
2914 !(cam->state & DEV_DISCONNECTED)) {
2915 DBG(1, "Video frame timeout elapsed");
2919 if (cam->state & DEV_DISCONNECTED)
2921 if (cam->state & DEV_MISCONFIGURED)
2925 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2926 f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, frame);
2927 list_del(cam->outqueue.next);
2928 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2930 f->state = F_UNUSED;
2932 memcpy(&b, &f->buf, sizeof(b));
2933 if (f->vma_use_count)
2934 b.flags |= V4L2_BUF_FLAG_MAPPED;
2936 if (copy_to_user(arg, &b, sizeof(b)))
2939 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2946 sn9c102_vidioc_streamon(struct sn9c102_device* cam, void __user * arg)
2950 if (copy_from_user(&type, arg, sizeof(type)))
2953 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2956 cam->stream = STREAM_ON;
2958 DBG(3, "Stream on");
2965 sn9c102_vidioc_streamoff(struct sn9c102_device* cam, void __user * arg)
2969 if (copy_from_user(&type, arg, sizeof(type)))
2972 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2975 if (cam->stream == STREAM_ON)
2976 if ((err = sn9c102_stream_interrupt(cam)))
2979 sn9c102_empty_framequeues(cam);
2981 DBG(3, "Stream off");
2988 sn9c102_vidioc_g_parm(struct sn9c102_device* cam, void __user * arg)
2990 struct v4l2_streamparm sp;
2992 if (copy_from_user(&sp, arg, sizeof(sp)))
2995 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2998 sp.parm.capture.extendedmode = 0;
2999 sp.parm.capture.readbuffers = cam->nreadbuffers;
3001 if (copy_to_user(arg, &sp, sizeof(sp)))
3009 sn9c102_vidioc_s_parm(struct sn9c102_device* cam, void __user * arg)
3011 struct v4l2_streamparm sp;
3013 if (copy_from_user(&sp, arg, sizeof(sp)))
3016 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
3019 sp.parm.capture.extendedmode = 0;
3021 if (sp.parm.capture.readbuffers == 0)
3022 sp.parm.capture.readbuffers = cam->nreadbuffers;
3024 if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES)
3025 sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES;
3027 if (copy_to_user(arg, &sp, sizeof(sp)))
3030 cam->nreadbuffers = sp.parm.capture.readbuffers;
3037 sn9c102_vidioc_enumaudio(struct sn9c102_device* cam, void __user * arg)
3039 struct v4l2_audio audio;
3041 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3044 if (copy_from_user(&audio, arg, sizeof(audio)))
3047 if (audio.index != 0)
3050 strcpy(audio.name, "Microphone");
3051 audio.capability = 0;
3054 if (copy_to_user(arg, &audio, sizeof(audio)))
3062 sn9c102_vidioc_g_audio(struct sn9c102_device* cam, void __user * arg)
3064 struct v4l2_audio audio;
3066 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3069 if (copy_from_user(&audio, arg, sizeof(audio)))
3072 memset(&audio, 0, sizeof(audio));
3073 strcpy(audio.name, "Microphone");
3075 if (copy_to_user(arg, &audio, sizeof(audio)))
3083 sn9c102_vidioc_s_audio(struct sn9c102_device* cam, void __user * arg)
3085 struct v4l2_audio audio;
3087 if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3090 if (copy_from_user(&audio, arg, sizeof(audio)))
3093 if (audio.index != 0)
3100 static long sn9c102_ioctl_v4l2(struct file *filp,
3101 unsigned int cmd, void __user *arg)
3103 struct sn9c102_device *cam = video_drvdata(filp);
3107 case VIDIOC_QUERYCAP:
3108 return sn9c102_vidioc_querycap(cam, arg);
3110 case VIDIOC_ENUMINPUT:
3111 return sn9c102_vidioc_enuminput(cam, arg);
3113 case VIDIOC_G_INPUT:
3114 return sn9c102_vidioc_g_input(cam, arg);
3116 case VIDIOC_S_INPUT:
3117 return sn9c102_vidioc_s_input(cam, arg);
3119 case VIDIOC_QUERYCTRL:
3120 return sn9c102_vidioc_query_ctrl(cam, arg);
3123 return sn9c102_vidioc_g_ctrl(cam, arg);
3126 return sn9c102_vidioc_s_ctrl(cam, arg);
3128 case VIDIOC_CROPCAP:
3129 return sn9c102_vidioc_cropcap(cam, arg);
3132 return sn9c102_vidioc_g_crop(cam, arg);
3135 return sn9c102_vidioc_s_crop(cam, arg);
3137 case VIDIOC_ENUM_FRAMESIZES:
3138 return sn9c102_vidioc_enum_framesizes(cam, arg);
3140 case VIDIOC_ENUM_FMT:
3141 return sn9c102_vidioc_enum_fmt(cam, arg);
3144 return sn9c102_vidioc_g_fmt(cam, arg);
3146 case VIDIOC_TRY_FMT:
3148 return sn9c102_vidioc_try_s_fmt(cam, cmd, arg);
3150 case VIDIOC_G_JPEGCOMP:
3151 return sn9c102_vidioc_g_jpegcomp(cam, arg);
3153 case VIDIOC_S_JPEGCOMP:
3154 return sn9c102_vidioc_s_jpegcomp(cam, arg);
3156 case VIDIOC_REQBUFS:
3157 return sn9c102_vidioc_reqbufs(cam, arg);
3159 case VIDIOC_QUERYBUF:
3160 return sn9c102_vidioc_querybuf(cam, arg);
3163 return sn9c102_vidioc_qbuf(cam, arg);
3166 return sn9c102_vidioc_dqbuf(cam, filp, arg);
3168 case VIDIOC_STREAMON:
3169 return sn9c102_vidioc_streamon(cam, arg);
3171 case VIDIOC_STREAMOFF:
3172 return sn9c102_vidioc_streamoff(cam, arg);
3175 return sn9c102_vidioc_g_parm(cam, arg);
3178 return sn9c102_vidioc_s_parm(cam, arg);
3180 case VIDIOC_ENUMAUDIO:
3181 return sn9c102_vidioc_enumaudio(cam, arg);
3183 case VIDIOC_G_AUDIO:
3184 return sn9c102_vidioc_g_audio(cam, arg);
3186 case VIDIOC_S_AUDIO:
3187 return sn9c102_vidioc_s_audio(cam, arg);
3196 static long sn9c102_ioctl(struct file *filp,
3197 unsigned int cmd, unsigned long arg)
3199 struct sn9c102_device *cam = video_drvdata(filp);
3202 if (mutex_lock_interruptible(&cam->fileop_mutex))
3203 return -ERESTARTSYS;
3205 if (cam->state & DEV_DISCONNECTED) {
3206 DBG(1, "Device not present");
3207 mutex_unlock(&cam->fileop_mutex);
3211 if (cam->state & DEV_MISCONFIGURED) {
3212 DBG(1, "The camera is misconfigured. Close and open it "
3214 mutex_unlock(&cam->fileop_mutex);
3218 V4LDBG(3, "sn9c102", cmd);
3220 err = sn9c102_ioctl_v4l2(filp, cmd, (void __user *)arg);
3222 mutex_unlock(&cam->fileop_mutex);
3227 /*****************************************************************************/
3229 static const struct v4l2_file_operations sn9c102_fops = {
3230 .owner = THIS_MODULE,
3231 .open = sn9c102_open,
3232 .release = sn9c102_release,
3233 .unlocked_ioctl = sn9c102_ioctl,
3234 .read = sn9c102_read,
3235 .poll = sn9c102_poll,
3236 .mmap = sn9c102_mmap,
3239 /*****************************************************************************/
3241 /* It exists a single interface only. We do not need to validate anything. */
3243 sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
3245 struct usb_device *udev = interface_to_usbdev(intf);
3246 struct sn9c102_device* cam;
3247 static unsigned int dev_nr;
3251 if (!(cam = kzalloc(sizeof(struct sn9c102_device), GFP_KERNEL)))
3256 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
3257 DBG(1, "kzalloc() failed");
3262 if (!(cam->v4ldev = video_device_alloc())) {
3263 DBG(1, "video_device_alloc() failed");
3268 r = sn9c102_read_reg(cam, 0x00);
3269 if (r < 0 || (r != 0x10 && r != 0x11 && r != 0x12)) {
3270 DBG(1, "Sorry, this is not a SN9C1xx-based camera "
3271 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3276 cam->bridge = id->driver_info;
3277 switch (cam->bridge) {
3278 case BRIDGE_SN9C101:
3279 case BRIDGE_SN9C102:
3280 DBG(2, "SN9C10[12] PC Camera Controller detected "
3281 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3283 case BRIDGE_SN9C103:
3284 DBG(2, "SN9C103 PC Camera Controller detected "
3285 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3287 case BRIDGE_SN9C105:
3288 DBG(2, "SN9C105 PC Camera Controller detected "
3289 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3291 case BRIDGE_SN9C120:
3292 DBG(2, "SN9C120 PC Camera Controller detected "
3293 "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3297 for (i = 0; i < ARRAY_SIZE(sn9c102_sensor_table); i++) {
3298 err = sn9c102_sensor_table[i](cam);
3304 DBG(2, "%s image sensor detected", cam->sensor.name);
3305 DBG(3, "Support for %s maintained by %s",
3306 cam->sensor.name, cam->sensor.maintainer);
3308 DBG(1, "No supported image sensor detected for this bridge");
3313 if (!(cam->bridge & cam->sensor.supported_bridge)) {
3314 DBG(1, "Bridge not supported");
3319 if (sn9c102_init(cam)) {
3320 DBG(1, "Initialization failed. I will retry on open().");
3321 cam->state |= DEV_MISCONFIGURED;
3324 strcpy(cam->v4ldev->name, "SN9C1xx PC Camera");
3325 cam->v4ldev->fops = &sn9c102_fops;
3326 cam->v4ldev->release = video_device_release;
3327 cam->v4ldev->parent = &udev->dev;
3329 init_completion(&cam->probe);
3331 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
3334 DBG(1, "V4L2 device registration failed");
3335 if (err == -ENFILE && video_nr[dev_nr] == -1)
3336 DBG(1, "Free /dev/videoX node not found");
3337 video_nr[dev_nr] = -1;
3338 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3339 complete_all(&cam->probe);
3343 DBG(2, "V4L2 device registered as %s",
3344 video_device_node_name(cam->v4ldev));
3346 video_set_drvdata(cam->v4ldev, cam);
3347 cam->module_param.force_munmap = force_munmap[dev_nr];
3348 cam->module_param.frame_timeout = frame_timeout[dev_nr];
3350 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3352 #ifdef CONFIG_VIDEO_ADV_DEBUG
3353 err = sn9c102_create_sysfs(cam);
3355 DBG(2, "Optional device control through 'sysfs' "
3358 DBG(2, "Failed to create optional 'sysfs' interface for "
3359 "device controlling. Error #%d", err);
3361 DBG(2, "Optional device control through 'sysfs' interface disabled");
3362 DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
3363 "configuration option to enable it.");
3366 usb_set_intfdata(intf, cam);
3367 kref_init(&cam->kref);
3368 usb_get_dev(cam->usbdev);
3370 complete_all(&cam->probe);
3376 kfree(cam->control_buffer);
3378 video_device_release(cam->v4ldev);
3385 static void sn9c102_usb_disconnect(struct usb_interface* intf)
3387 struct sn9c102_device* cam;
3389 down_write(&sn9c102_dev_lock);
3391 cam = usb_get_intfdata(intf);
3393 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
3396 DBG(2, "Device %s is open! Deregistration and memory "
3397 "deallocation are deferred.",
3398 video_device_node_name(cam->v4ldev));
3399 cam->state |= DEV_MISCONFIGURED;
3400 sn9c102_stop_transfer(cam);
3401 cam->state |= DEV_DISCONNECTED;
3402 wake_up_interruptible(&cam->wait_frame);
3403 wake_up(&cam->wait_stream);
3405 cam->state |= DEV_DISCONNECTED;
3407 wake_up_interruptible_all(&cam->wait_open);
3409 kref_put(&cam->kref, sn9c102_release_resources);
3411 up_write(&sn9c102_dev_lock);
3415 static struct usb_driver sn9c102_usb_driver = {
3417 .id_table = sn9c102_id_table,
3418 .probe = sn9c102_usb_probe,
3419 .disconnect = sn9c102_usb_disconnect,
3422 module_usb_driver(sn9c102_usb_driver);