1 /***************************************************************************
2 * V4L2 driver for ET61X[12]51 PC Camera Controllers *
4 * Copyright (C) 2006 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/moduleparam.h>
26 #include <linux/errno.h>
27 #include <linux/slab.h>
28 #include <linux/string.h>
29 #include <linux/device.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>
38 #include <linux/vmalloc.h>
39 #include <linux/page-flags.h>
40 #include <linux/byteorder/generic.h>
42 #include <asm/uaccess.h>
46 /*****************************************************************************/
48 #define ET61X251_MODULE_NAME "V4L2 driver for ET61X[12]51 " \
49 "PC Camera Controllers"
50 #define ET61X251_MODULE_AUTHOR "(C) 2006 Luca Risolia"
51 #define ET61X251_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
52 #define ET61X251_MODULE_LICENSE "GPL"
53 #define ET61X251_MODULE_VERSION "1:1.01"
54 #define ET61X251_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 1)
56 /*****************************************************************************/
58 MODULE_DEVICE_TABLE(usb, et61x251_id_table);
60 MODULE_AUTHOR(ET61X251_MODULE_AUTHOR " " ET61X251_AUTHOR_EMAIL);
61 MODULE_DESCRIPTION(ET61X251_MODULE_NAME);
62 MODULE_VERSION(ET61X251_MODULE_VERSION);
63 MODULE_LICENSE(ET61X251_MODULE_LICENSE);
65 static short video_nr[] = {[0 ... ET61X251_MAX_DEVICES-1] = -1};
66 module_param_array(video_nr, short, NULL, 0444);
67 MODULE_PARM_DESC(video_nr,
68 "\n<-1|n[,...]> Specify V4L2 minor mode number."
69 "\n -1 = use next available (default)"
70 "\n n = use minor number n (integer >= 0)"
71 "\nYou can specify up to "
72 __MODULE_STRING(ET61X251_MAX_DEVICES) " cameras this way."
74 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
75 "\nthe second registered camera and use auto for the first"
76 "\none and for every other camera."
79 static short force_munmap[] = {[0 ... ET61X251_MAX_DEVICES-1] =
80 ET61X251_FORCE_MUNMAP};
81 module_param_array(force_munmap, bool, NULL, 0444);
82 MODULE_PARM_DESC(force_munmap,
83 "\n<0|1[,...]> Force 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 "\n 0 = do not force memory unmapping"
89 "\n 1 = force memory unmapping (save memory)"
90 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
94 static unsigned short debug = ET61X251_DEBUG_LEVEL;
95 module_param(debug, ushort, 0644);
96 MODULE_PARM_DESC(debug,
97 "\n<n> Debugging information level, from 0 to 3:"
98 "\n0 = none (use carefully)"
99 "\n1 = critical errors"
100 "\n2 = significant informations"
101 "\n3 = more verbose messages"
102 "\nLevel 3 is useful for testing only, when only "
103 "one device is used."
104 "\nDefault value is "__MODULE_STRING(ET61X251_DEBUG_LEVEL)"."
108 /*****************************************************************************/
111 et61x251_request_buffers(struct et61x251_device* cam, u32 count,
112 enum et61x251_io_method io)
114 struct v4l2_pix_format* p = &(cam->sensor->pix_format);
115 struct v4l2_rect* r = &(cam->sensor->cropcap.bounds);
116 const size_t imagesize = cam->module_param.force_munmap ||
118 (p->width * p->height * p->priv) / 8 :
119 (r->width * r->height * p->priv) / 8;
123 if (count > ET61X251_MAX_FRAMES)
124 count = ET61X251_MAX_FRAMES;
126 cam->nbuffers = count;
127 while (cam->nbuffers > 0) {
128 if ((buff = vmalloc_32(cam->nbuffers * PAGE_ALIGN(imagesize))))
133 for (i = 0; i < cam->nbuffers; i++) {
134 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
135 cam->frame[i].buf.index = i;
136 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
137 cam->frame[i].buf.length = imagesize;
138 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
139 cam->frame[i].buf.sequence = 0;
140 cam->frame[i].buf.field = V4L2_FIELD_NONE;
141 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
142 cam->frame[i].buf.flags = 0;
145 return cam->nbuffers;
149 static void et61x251_release_buffers(struct et61x251_device* cam)
152 vfree(cam->frame[0].bufmem);
155 cam->frame_current = NULL;
159 static void et61x251_empty_framequeues(struct et61x251_device* cam)
163 INIT_LIST_HEAD(&cam->inqueue);
164 INIT_LIST_HEAD(&cam->outqueue);
166 for (i = 0; i < ET61X251_MAX_FRAMES; i++) {
167 cam->frame[i].state = F_UNUSED;
168 cam->frame[i].buf.bytesused = 0;
173 static void et61x251_requeue_outqueue(struct et61x251_device* cam)
175 struct et61x251_frame_t *i;
177 list_for_each_entry(i, &cam->outqueue, frame) {
179 list_add(&i->frame, &cam->inqueue);
182 INIT_LIST_HEAD(&cam->outqueue);
186 static void et61x251_queue_unusedframes(struct et61x251_device* cam)
188 unsigned long lock_flags;
191 for (i = 0; i < cam->nbuffers; i++)
192 if (cam->frame[i].state == F_UNUSED) {
193 cam->frame[i].state = F_QUEUED;
194 spin_lock_irqsave(&cam->queue_lock, lock_flags);
195 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
196 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
200 /*****************************************************************************/
202 int et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
204 struct usb_device* udev = cam->usbdev;
205 u8* buff = cam->control_buffer;
210 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
211 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
213 DBG(3, "Failed to write a register (value 0x%02X, index "
214 "0x%02X, error %d)", value, index, res);
222 int et61x251_read_reg(struct et61x251_device* cam, u16 index)
224 struct usb_device* udev = cam->usbdev;
225 u8* buff = cam->control_buffer;
228 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
229 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
231 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
234 return (res >= 0) ? (int)(*buff) : -1;
239 et61x251_i2c_wait(struct et61x251_device* cam, struct et61x251_sensor* sensor)
243 for (i = 1; i <= 8; i++) {
244 if (sensor->interface == ET61X251_I2C_3WIRES) {
245 r = et61x251_read_reg(cam, 0x8e);
246 if (!(r & 0x02) && (r >= 0))
249 r = et61x251_read_reg(cam, 0x8b);
250 if (!(r & 0x01) && (r >= 0))
255 udelay(8*8); /* minimum for sensors at 400kHz */
263 et61x251_i2c_try_read(struct et61x251_device* cam,
264 struct et61x251_sensor* sensor, u8 address)
266 struct usb_device* udev = cam->usbdev;
267 u8* data = cam->control_buffer;
271 data[1] = cam->sensor->i2c_slave_id;
272 data[2] = cam->sensor->rsta | 0x10;
273 data[3] = !(et61x251_read_reg(cam, 0x8b) & 0x02);
274 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
275 0, 0x88, data, 4, ET61X251_CTRL_TIMEOUT);
279 err += et61x251_i2c_wait(cam, sensor);
281 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
282 0, 0x80, data, 8, ET61X251_CTRL_TIMEOUT);
287 DBG(3, "I2C read failed for %s image sensor", sensor->name);
289 PDBGG("I2C read: address 0x%02X, value: 0x%02X", address, data[0]);
291 return err ? -1 : (int)data[0];
296 et61x251_i2c_try_write(struct et61x251_device* cam,
297 struct et61x251_sensor* sensor, u8 address, u8 value)
299 struct usb_device* udev = cam->usbdev;
300 u8* data = cam->control_buffer;
304 data[1] = cam->sensor->i2c_slave_id;
305 data[2] = cam->sensor->rsta | 0x12;
306 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
307 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
312 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
313 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
317 err += et61x251_i2c_wait(cam, sensor);
320 DBG(3, "I2C write failed for %s image sensor", sensor->name);
322 PDBGG("I2C write: address 0x%02X, value: 0x%02X", address, value);
329 et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
330 u8 data3, u8 data4, u8 data5, u8 data6, u8 data7,
331 u8 data8, u8 address)
333 struct usb_device* udev = cam->usbdev;
334 u8* data = cam->control_buffer;
347 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
348 0, 0x81, data, n-1, ET61X251_CTRL_TIMEOUT);
353 data[1] = cam->sensor->i2c_slave_id;
354 data[2] = cam->sensor->rsta | 0x02 | (n << 4);
355 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
356 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
360 /* Start writing through the serial interface */
362 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
363 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
367 err += et61x251_i2c_wait(cam, cam->sensor);
370 DBG(3, "I2C raw write failed for %s image sensor",
373 PDBGG("I2C raw write: %u bytes, address = 0x%02X, data1 = 0x%02X, "
374 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X,"
375 " data6 = 0x%02X, data7 = 0x%02X, data8 = 0x%02X", n, address,
376 data1, data2, data3, data4, data5, data6, data7, data8);
383 int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
388 return et61x251_i2c_try_read(cam, cam->sensor, address);
392 int et61x251_i2c_write(struct et61x251_device* cam, u8 address, u8 value)
397 return et61x251_i2c_try_write(cam, cam->sensor, address, value);
400 /*****************************************************************************/
402 static void et61x251_urb_complete(struct urb *urb, struct pt_regs* regs)
404 struct et61x251_device* cam = urb->context;
405 struct et61x251_frame_t** f;
410 if (urb->status == -ENOENT)
413 f = &cam->frame_current;
415 if (cam->stream == STREAM_INTERRUPT) {
416 cam->stream = STREAM_OFF;
418 (*f)->state = F_QUEUED;
419 DBG(3, "Stream interrupted");
420 wake_up_interruptible(&cam->wait_stream);
423 if (cam->state & DEV_DISCONNECTED)
426 if (cam->state & DEV_MISCONFIGURED) {
427 wake_up_interruptible(&cam->wait_frame);
431 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
435 (*f) = list_entry(cam->inqueue.next, struct et61x251_frame_t,
438 imagesize = (cam->sensor->pix_format.width *
439 cam->sensor->pix_format.height *
440 cam->sensor->pix_format.priv) / 8;
442 for (i = 0; i < urb->number_of_packets; i++) {
443 unsigned int len, status;
446 const u8 VOID_BYTES = 6;
449 len = urb->iso_frame_desc[i].actual_length;
450 status = urb->iso_frame_desc[i].status;
451 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
454 DBG(3, "Error in isochronous frame");
455 (*f)->state = F_ERROR;
461 sof = ((*b1 & 0x3f) == 63);
462 imglen = ((*b1 & 0xc0) << 2) | *b2;
464 PDBGG("Isochrnous frame: length %u, #%u i, image length %zu",
467 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
470 (*f)->state = F_GRABBING;
471 (*f)->buf.bytesused = 0;
472 do_gettimeofday(&(*f)->buf.timestamp);
474 DBG(3, "SOF detected: new video frame");
477 if ((*f)->state == F_GRABBING) {
478 if (sof && (*f)->buf.bytesused) {
479 if (cam->sensor->pix_format.pixelformat ==
480 V4L2_PIX_FMT_ET61X251)
483 DBG(3, "Not expected SOF detected "
485 (unsigned long)(*f)->buf.bytesused);
486 (*f)->state = F_ERROR;
491 if ((*f)->buf.bytesused + imglen > imagesize) {
492 DBG(3, "Video frame size exceeded");
493 (*f)->state = F_ERROR;
499 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, imglen);
500 (*f)->buf.bytesused += imglen;
502 if ((*f)->buf.bytesused == imagesize) {
505 b = (*f)->buf.bytesused;
506 (*f)->state = F_DONE;
507 (*f)->buf.sequence= ++cam->frame_count;
508 spin_lock(&cam->queue_lock);
509 list_move_tail(&(*f)->frame, &cam->outqueue);
510 if (!list_empty(&cam->inqueue))
511 (*f) = list_entry(cam->inqueue.next,
512 struct et61x251_frame_t,
516 spin_unlock(&cam->queue_lock);
517 DBG(3, "Video frame captured: : %lu bytes",
524 cam->sensor->pix_format.pixelformat ==
525 V4L2_PIX_FMT_ET61X251)
532 urb->dev = cam->usbdev;
533 err = usb_submit_urb(urb, GFP_ATOMIC);
534 if (err < 0 && err != -EPERM) {
535 cam->state |= DEV_MISCONFIGURED;
536 DBG(1, "usb_submit_urb() failed");
539 wake_up_interruptible(&cam->wait_frame);
543 static int et61x251_start_transfer(struct et61x251_device* cam)
545 struct usb_device *udev = cam->usbdev;
547 const unsigned int wMaxPacketSize[] = {0, 256, 384, 512, 640, 768, 832,
548 864, 896, 920, 956, 980, 1000,
550 const unsigned int psz = wMaxPacketSize[ET61X251_ALTERNATE_SETTING];
554 for (i = 0; i < ET61X251_URBS; i++) {
555 cam->transfer_buffer[i] = kzalloc(ET61X251_ISO_PACKETS * psz,
557 if (!cam->transfer_buffer[i]) {
559 DBG(1, "Not enough memory");
564 for (i = 0; i < ET61X251_URBS; i++) {
565 urb = usb_alloc_urb(ET61X251_ISO_PACKETS, GFP_KERNEL);
569 DBG(1, "usb_alloc_urb() failed");
574 urb->pipe = usb_rcvisocpipe(udev, 1);
575 urb->transfer_flags = URB_ISO_ASAP;
576 urb->number_of_packets = ET61X251_ISO_PACKETS;
577 urb->complete = et61x251_urb_complete;
578 urb->transfer_buffer = cam->transfer_buffer[i];
579 urb->transfer_buffer_length = psz * ET61X251_ISO_PACKETS;
581 for (j = 0; j < ET61X251_ISO_PACKETS; j++) {
582 urb->iso_frame_desc[j].offset = psz * j;
583 urb->iso_frame_desc[j].length = psz;
587 err = et61x251_write_reg(cam, 0x01, 0x03);
588 err = et61x251_write_reg(cam, 0x00, 0x03);
589 err = et61x251_write_reg(cam, 0x08, 0x03);
592 DBG(1, "I/O hardware error");
596 err = usb_set_interface(udev, 0, ET61X251_ALTERNATE_SETTING);
598 DBG(1, "usb_set_interface() failed");
602 cam->frame_current = NULL;
604 for (i = 0; i < ET61X251_URBS; i++) {
605 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
607 for (j = i-1; j >= 0; j--)
608 usb_kill_urb(cam->urb[j]);
609 DBG(1, "usb_submit_urb() failed, error %d", err);
617 for (i = 0; (i < ET61X251_URBS) && cam->urb[i]; i++)
618 usb_free_urb(cam->urb[i]);
621 for (i = 0; (i < ET61X251_URBS) && cam->transfer_buffer[i]; i++)
622 kfree(cam->transfer_buffer[i]);
628 static int et61x251_stop_transfer(struct et61x251_device* cam)
630 struct usb_device *udev = cam->usbdev;
634 if (cam->state & DEV_DISCONNECTED)
637 for (i = ET61X251_URBS-1; i >= 0; i--) {
638 usb_kill_urb(cam->urb[i]);
639 usb_free_urb(cam->urb[i]);
640 kfree(cam->transfer_buffer[i]);
643 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
645 DBG(3, "usb_set_interface() failed");
651 static int et61x251_stream_interrupt(struct et61x251_device* cam)
655 cam->stream = STREAM_INTERRUPT;
656 err = wait_event_timeout(cam->wait_stream,
657 (cam->stream == STREAM_OFF) ||
658 (cam->state & DEV_DISCONNECTED),
659 ET61X251_URB_TIMEOUT);
660 if (cam->state & DEV_DISCONNECTED)
663 cam->state |= DEV_MISCONFIGURED;
664 DBG(1, "URB timeout reached. The camera is misconfigured. To "
665 "use it, close and open /dev/video%d again.",
673 /*****************************************************************************/
675 #ifdef CONFIG_VIDEO_ADV_DEBUG
676 static u8 et61x251_strtou8(const char* buff, size_t len, ssize_t* count)
683 strncpy(str, buff, len);
686 strncpy(str, buff, 4);
690 val = simple_strtoul(str, &endp, 0);
694 *count = (ssize_t)(endp - str);
695 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
702 NOTE 1: being inside one of the following methods implies that the v4l
703 device exists for sure (see kobjects and reference counters)
704 NOTE 2: buffers are PAGE_SIZE long
707 static ssize_t et61x251_show_reg(struct class_device* cd, char* buf)
709 struct et61x251_device* cam;
712 if (down_interruptible(&et61x251_sysfs_lock))
715 cam = video_get_drvdata(to_video_device(cd));
717 up(&et61x251_sysfs_lock);
721 count = sprintf(buf, "%u\n", cam->sysfs.reg);
723 up(&et61x251_sysfs_lock);
730 et61x251_store_reg(struct class_device* cd, const char* buf, size_t len)
732 struct et61x251_device* cam;
736 if (down_interruptible(&et61x251_sysfs_lock))
739 cam = video_get_drvdata(to_video_device(cd));
741 up(&et61x251_sysfs_lock);
745 index = et61x251_strtou8(buf, len, &count);
746 if (index > 0x8e || !count) {
747 up(&et61x251_sysfs_lock);
751 cam->sysfs.reg = index;
753 DBG(2, "Moved ET61X[12]51 register index to 0x%02X", cam->sysfs.reg);
754 DBG(3, "Written bytes: %zd", count);
756 up(&et61x251_sysfs_lock);
762 static ssize_t et61x251_show_val(struct class_device* cd, char* buf)
764 struct et61x251_device* cam;
768 if (down_interruptible(&et61x251_sysfs_lock))
771 cam = video_get_drvdata(to_video_device(cd));
773 up(&et61x251_sysfs_lock);
777 if ((val = et61x251_read_reg(cam, cam->sysfs.reg)) < 0) {
778 up(&et61x251_sysfs_lock);
782 count = sprintf(buf, "%d\n", val);
784 DBG(3, "Read bytes: %zd", count);
786 up(&et61x251_sysfs_lock);
793 et61x251_store_val(struct class_device* cd, const char* buf, size_t len)
795 struct et61x251_device* cam;
800 if (down_interruptible(&et61x251_sysfs_lock))
803 cam = video_get_drvdata(to_video_device(cd));
805 up(&et61x251_sysfs_lock);
809 value = et61x251_strtou8(buf, len, &count);
811 up(&et61x251_sysfs_lock);
815 err = et61x251_write_reg(cam, value, cam->sysfs.reg);
817 up(&et61x251_sysfs_lock);
821 DBG(2, "Written ET61X[12]51 reg. 0x%02X, val. 0x%02X",
822 cam->sysfs.reg, value);
823 DBG(3, "Written bytes: %zd", count);
825 up(&et61x251_sysfs_lock);
831 static ssize_t et61x251_show_i2c_reg(struct class_device* cd, char* buf)
833 struct et61x251_device* cam;
836 if (down_interruptible(&et61x251_sysfs_lock))
839 cam = video_get_drvdata(to_video_device(cd));
841 up(&et61x251_sysfs_lock);
845 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
847 DBG(3, "Read bytes: %zd", count);
849 up(&et61x251_sysfs_lock);
856 et61x251_store_i2c_reg(struct class_device* cd, const char* buf, size_t len)
858 struct et61x251_device* cam;
862 if (down_interruptible(&et61x251_sysfs_lock))
865 cam = video_get_drvdata(to_video_device(cd));
867 up(&et61x251_sysfs_lock);
871 index = et61x251_strtou8(buf, len, &count);
873 up(&et61x251_sysfs_lock);
877 cam->sysfs.i2c_reg = index;
879 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
880 DBG(3, "Written bytes: %zd", count);
882 up(&et61x251_sysfs_lock);
888 static ssize_t et61x251_show_i2c_val(struct class_device* cd, char* buf)
890 struct et61x251_device* cam;
894 if (down_interruptible(&et61x251_sysfs_lock))
897 cam = video_get_drvdata(to_video_device(cd));
899 up(&et61x251_sysfs_lock);
903 if (!(cam->sensor->sysfs_ops & ET61X251_I2C_READ)) {
904 up(&et61x251_sysfs_lock);
908 if ((val = et61x251_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
909 up(&et61x251_sysfs_lock);
913 count = sprintf(buf, "%d\n", val);
915 DBG(3, "Read bytes: %zd", count);
917 up(&et61x251_sysfs_lock);
924 et61x251_store_i2c_val(struct class_device* cd, const char* buf, size_t len)
926 struct et61x251_device* cam;
931 if (down_interruptible(&et61x251_sysfs_lock))
934 cam = video_get_drvdata(to_video_device(cd));
936 up(&et61x251_sysfs_lock);
940 if (!(cam->sensor->sysfs_ops & ET61X251_I2C_READ)) {
941 up(&et61x251_sysfs_lock);
945 value = et61x251_strtou8(buf, len, &count);
947 up(&et61x251_sysfs_lock);
951 err = et61x251_i2c_write(cam, cam->sysfs.i2c_reg, value);
953 up(&et61x251_sysfs_lock);
957 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
958 cam->sysfs.i2c_reg, value);
959 DBG(3, "Written bytes: %zd", count);
961 up(&et61x251_sysfs_lock);
967 static CLASS_DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
968 et61x251_show_reg, et61x251_store_reg);
969 static CLASS_DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
970 et61x251_show_val, et61x251_store_val);
971 static CLASS_DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
972 et61x251_show_i2c_reg, et61x251_store_i2c_reg);
973 static CLASS_DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
974 et61x251_show_i2c_val, et61x251_store_i2c_val);
977 static void et61x251_create_sysfs(struct et61x251_device* cam)
979 struct video_device *v4ldev = cam->v4ldev;
981 video_device_create_file(v4ldev, &class_device_attr_reg);
982 video_device_create_file(v4ldev, &class_device_attr_val);
983 if (cam->sensor && cam->sensor->sysfs_ops) {
984 video_device_create_file(v4ldev, &class_device_attr_i2c_reg);
985 video_device_create_file(v4ldev, &class_device_attr_i2c_val);
988 #endif /* CONFIG_VIDEO_ADV_DEBUG */
990 /*****************************************************************************/
993 et61x251_set_pix_format(struct et61x251_device* cam,
994 struct v4l2_pix_format* pix)
998 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1000 if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1001 err += et61x251_write_reg(cam, r & 0xfd, 0x12);
1003 err += et61x251_write_reg(cam, r | 0x02, 0x12);
1005 return err ? -EIO : 0;
1010 et61x251_set_compression(struct et61x251_device* cam,
1011 struct v4l2_jpegcompression* compression)
1015 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1017 if (compression->quality == 0)
1018 err += et61x251_write_reg(cam, r & 0xfb, 0x12);
1020 err += et61x251_write_reg(cam, r | 0x04, 0x12);
1022 return err ? -EIO : 0;
1026 static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
1030 r = et61x251_read_reg(cam, 0x12);
1035 err += et61x251_write_reg(cam, r & ~0x01, 0x12);
1036 else if (scale == 2)
1037 err += et61x251_write_reg(cam, r | 0x01, 0x12);
1042 PDBGG("Scaling factor: %u", scale);
1049 et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
1051 struct et61x251_sensor* s = cam->sensor;
1052 u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
1053 s->active_pixel.left),
1054 fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
1055 s->active_pixel.top),
1056 fmw_length = (u16)(rect->width),
1057 fmw_height = (u16)(rect->height);
1060 err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
1061 err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
1062 err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
1063 err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
1064 err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
1065 | ((fmw_length & 0x300) >> 4)
1066 | ((fmw_height & 0x300) >> 2), 0x6d);
1070 PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
1071 fmw_sx, fmw_sy, fmw_length, fmw_height);
1077 static int et61x251_init(struct et61x251_device* cam)
1079 struct et61x251_sensor* s = cam->sensor;
1080 struct v4l2_control ctrl;
1081 struct v4l2_queryctrl *qctrl;
1082 struct v4l2_rect* rect;
1086 if (!(cam->state & DEV_INITIALIZED)) {
1087 init_waitqueue_head(&cam->open);
1089 rect = &(s->cropcap.defrect);
1090 cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
1091 } else { /* use current values */
1096 err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
1097 err += et61x251_set_crop(cam, rect);
1104 DBG(3, "Sensor initialization failed");
1109 err += et61x251_set_compression(cam, &cam->compression);
1110 err += et61x251_set_pix_format(cam, &s->pix_format);
1111 if (s->set_pix_format)
1112 err += s->set_pix_format(cam, &s->pix_format);
1116 if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
1117 DBG(3, "Compressed video format is active, quality %d",
1118 cam->compression.quality);
1120 DBG(3, "Uncompressed video format is active");
1123 if ((err = s->set_crop(cam, rect))) {
1124 DBG(3, "set_crop() failed");
1129 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1130 if (s->qctrl[i].id != 0 &&
1131 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1132 ctrl.id = s->qctrl[i].id;
1133 ctrl.value = qctrl[i].default_value;
1134 err = s->set_ctrl(cam, &ctrl);
1136 DBG(3, "Set %s control failed",
1140 DBG(3, "Image sensor supports '%s' control",
1145 if (!(cam->state & DEV_INITIALIZED)) {
1146 init_MUTEX(&cam->fileop_sem);
1147 spin_lock_init(&cam->queue_lock);
1148 init_waitqueue_head(&cam->wait_frame);
1149 init_waitqueue_head(&cam->wait_stream);
1150 cam->nreadbuffers = 2;
1151 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1152 memcpy(&(s->_rect), &(s->cropcap.defrect),
1153 sizeof(struct v4l2_rect));
1154 cam->state |= DEV_INITIALIZED;
1157 DBG(2, "Initialization succeeded");
1162 static void et61x251_release_resources(struct et61x251_device* cam)
1164 down(&et61x251_sysfs_lock);
1166 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
1167 video_set_drvdata(cam->v4ldev, NULL);
1168 video_unregister_device(cam->v4ldev);
1170 up(&et61x251_sysfs_lock);
1172 kfree(cam->control_buffer);
1175 /*****************************************************************************/
1177 static int et61x251_open(struct inode* inode, struct file* filp)
1179 struct et61x251_device* cam;
1183 This is the only safe way to prevent race conditions with
1186 if (!down_read_trylock(&et61x251_disconnect))
1187 return -ERESTARTSYS;
1189 cam = video_get_drvdata(video_devdata(filp));
1191 if (down_interruptible(&cam->dev_sem)) {
1192 up_read(&et61x251_disconnect);
1193 return -ERESTARTSYS;
1197 DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
1198 if ((filp->f_flags & O_NONBLOCK) ||
1199 (filp->f_flags & O_NDELAY)) {
1204 err = wait_event_interruptible_exclusive(cam->open,
1205 cam->state & DEV_DISCONNECTED
1208 up_read(&et61x251_disconnect);
1211 if (cam->state & DEV_DISCONNECTED) {
1212 up_read(&et61x251_disconnect);
1215 down(&cam->dev_sem);
1219 if (cam->state & DEV_MISCONFIGURED) {
1220 err = et61x251_init(cam);
1222 DBG(1, "Initialization failed again. "
1223 "I will retry on next open().");
1226 cam->state &= ~DEV_MISCONFIGURED;
1229 if ((err = et61x251_start_transfer(cam)))
1232 filp->private_data = cam;
1235 cam->stream = STREAM_OFF;
1237 cam->frame_count = 0;
1238 et61x251_empty_framequeues(cam);
1240 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
1244 up_read(&et61x251_disconnect);
1249 static int et61x251_release(struct inode* inode, struct file* filp)
1251 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1253 down(&cam->dev_sem); /* prevent disconnect() to be called */
1255 et61x251_stop_transfer(cam);
1257 et61x251_release_buffers(cam);
1259 if (cam->state & DEV_DISCONNECTED) {
1260 et61x251_release_resources(cam);
1267 wake_up_interruptible_nr(&cam->open, 1);
1269 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
1278 et61x251_read(struct file* filp, char __user * buf,
1279 size_t count, loff_t* f_pos)
1281 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1282 struct et61x251_frame_t* f, * i;
1283 unsigned long lock_flags;
1286 if (down_interruptible(&cam->fileop_sem))
1287 return -ERESTARTSYS;
1289 if (cam->state & DEV_DISCONNECTED) {
1290 DBG(1, "Device not present");
1291 up(&cam->fileop_sem);
1295 if (cam->state & DEV_MISCONFIGURED) {
1296 DBG(1, "The camera is misconfigured. Close and open it "
1298 up(&cam->fileop_sem);
1302 if (cam->io == IO_MMAP) {
1303 DBG(3, "Close and open the device again to choose the read "
1305 up(&cam->fileop_sem);
1309 if (cam->io == IO_NONE) {
1310 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1312 DBG(1, "read() failed, not enough memory");
1313 up(&cam->fileop_sem);
1317 cam->stream = STREAM_ON;
1320 if (list_empty(&cam->inqueue)) {
1321 if (!list_empty(&cam->outqueue))
1322 et61x251_empty_framequeues(cam);
1323 et61x251_queue_unusedframes(cam);
1327 up(&cam->fileop_sem);
1331 if (list_empty(&cam->outqueue)) {
1332 if (filp->f_flags & O_NONBLOCK) {
1333 up(&cam->fileop_sem);
1336 err = wait_event_interruptible
1338 (!list_empty(&cam->outqueue)) ||
1339 (cam->state & DEV_DISCONNECTED) ||
1340 (cam->state & DEV_MISCONFIGURED) );
1342 up(&cam->fileop_sem);
1345 if (cam->state & DEV_DISCONNECTED) {
1346 up(&cam->fileop_sem);
1349 if (cam->state & DEV_MISCONFIGURED) {
1350 up(&cam->fileop_sem);
1355 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1357 if (count > f->buf.bytesused)
1358 count = f->buf.bytesused;
1360 if (copy_to_user(buf, f->bufmem, count)) {
1367 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1368 list_for_each_entry(i, &cam->outqueue, frame)
1369 i->state = F_UNUSED;
1370 INIT_LIST_HEAD(&cam->outqueue);
1371 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1373 et61x251_queue_unusedframes(cam);
1375 PDBGG("Frame #%lu, bytes read: %zu",
1376 (unsigned long)f->buf.index, count);
1378 up(&cam->fileop_sem);
1380 return err ? err : count;
1384 static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1386 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1387 struct et61x251_frame_t* f;
1388 unsigned long lock_flags;
1389 unsigned int mask = 0;
1391 if (down_interruptible(&cam->fileop_sem))
1394 if (cam->state & DEV_DISCONNECTED) {
1395 DBG(1, "Device not present");
1399 if (cam->state & DEV_MISCONFIGURED) {
1400 DBG(1, "The camera is misconfigured. Close and open it "
1405 if (cam->io == IO_NONE) {
1406 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1408 DBG(1, "poll() failed, not enough memory");
1412 cam->stream = STREAM_ON;
1415 if (cam->io == IO_READ) {
1416 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1417 list_for_each_entry(f, &cam->outqueue, frame)
1418 f->state = F_UNUSED;
1419 INIT_LIST_HEAD(&cam->outqueue);
1420 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1421 et61x251_queue_unusedframes(cam);
1424 poll_wait(filp, &cam->wait_frame, wait);
1426 if (!list_empty(&cam->outqueue))
1427 mask |= POLLIN | POLLRDNORM;
1429 up(&cam->fileop_sem);
1434 up(&cam->fileop_sem);
1439 static void et61x251_vm_open(struct vm_area_struct* vma)
1441 struct et61x251_frame_t* f = vma->vm_private_data;
1446 static void et61x251_vm_close(struct vm_area_struct* vma)
1448 /* NOTE: buffers are not freed here */
1449 struct et61x251_frame_t* f = vma->vm_private_data;
1454 static struct vm_operations_struct et61x251_vm_ops = {
1455 .open = et61x251_vm_open,
1456 .close = et61x251_vm_close,
1460 static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1462 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1463 unsigned long size = vma->vm_end - vma->vm_start,
1464 start = vma->vm_start;
1468 if (down_interruptible(&cam->fileop_sem))
1469 return -ERESTARTSYS;
1471 if (cam->state & DEV_DISCONNECTED) {
1472 DBG(1, "Device not present");
1473 up(&cam->fileop_sem);
1477 if (cam->state & DEV_MISCONFIGURED) {
1478 DBG(1, "The camera is misconfigured. Close and open it "
1480 up(&cam->fileop_sem);
1484 if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
1485 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1486 up(&cam->fileop_sem);
1490 for (i = 0; i < cam->nbuffers; i++) {
1491 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1494 if (i == cam->nbuffers) {
1495 up(&cam->fileop_sem);
1499 vma->vm_flags |= VM_IO;
1500 vma->vm_flags |= VM_RESERVED;
1502 pos = cam->frame[i].bufmem;
1503 while (size > 0) { /* size is page-aligned */
1504 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1505 up(&cam->fileop_sem);
1513 vma->vm_ops = &et61x251_vm_ops;
1514 vma->vm_private_data = &cam->frame[i];
1516 et61x251_vm_open(vma);
1518 up(&cam->fileop_sem);
1523 /*****************************************************************************/
1526 et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1528 struct v4l2_capability cap = {
1529 .driver = "et61x251",
1530 .version = ET61X251_MODULE_VERSION_CODE,
1531 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1535 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1536 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1537 strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
1538 sizeof(cap.bus_info));
1540 if (copy_to_user(arg, &cap, sizeof(cap)))
1548 et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1550 struct v4l2_input i;
1552 if (copy_from_user(&i, arg, sizeof(i)))
1558 memset(&i, 0, sizeof(i));
1559 strcpy(i.name, "Camera");
1561 if (copy_to_user(arg, &i, sizeof(i)))
1569 et61x251_vidioc_gs_input(struct et61x251_device* cam, void __user * arg)
1573 if (copy_from_user(&index, arg, sizeof(index)))
1584 et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1586 struct et61x251_sensor* s = cam->sensor;
1587 struct v4l2_queryctrl qc;
1590 if (copy_from_user(&qc, arg, sizeof(qc)))
1593 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1594 if (qc.id && qc.id == s->qctrl[i].id) {
1595 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1596 if (copy_to_user(arg, &qc, sizeof(qc)))
1606 et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1608 struct et61x251_sensor* s = cam->sensor;
1609 struct v4l2_control ctrl;
1613 if (!s->get_ctrl && !s->set_ctrl)
1616 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1620 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1621 if (ctrl.id == s->qctrl[i].id) {
1622 ctrl.value = s->_qctrl[i].default_value;
1627 err = s->get_ctrl(cam, &ctrl);
1630 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1638 et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1640 struct et61x251_sensor* s = cam->sensor;
1641 struct v4l2_control ctrl;
1648 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1651 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1652 if (ctrl.id == s->qctrl[i].id) {
1653 if (ctrl.value < s->qctrl[i].minimum ||
1654 ctrl.value > s->qctrl[i].maximum)
1656 ctrl.value -= ctrl.value % s->qctrl[i].step;
1660 if ((err = s->set_ctrl(cam, &ctrl)))
1663 s->_qctrl[i].default_value = ctrl.value;
1670 et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1672 struct v4l2_cropcap* cc = &(cam->sensor->cropcap);
1674 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1675 cc->pixelaspect.numerator = 1;
1676 cc->pixelaspect.denominator = 1;
1678 if (copy_to_user(arg, cc, sizeof(*cc)))
1686 et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1688 struct et61x251_sensor* s = cam->sensor;
1689 struct v4l2_crop crop = {
1690 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1693 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1695 if (copy_to_user(arg, &crop, sizeof(crop)))
1703 et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1705 struct et61x251_sensor* s = cam->sensor;
1706 struct v4l2_crop crop;
1707 struct v4l2_rect* rect;
1708 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1709 struct v4l2_pix_format* pix_format = &(s->pix_format);
1711 const enum et61x251_stream_state stream = cam->stream;
1712 const u32 nbuffers = cam->nbuffers;
1716 if (copy_from_user(&crop, arg, sizeof(crop)))
1721 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1724 if (cam->module_param.force_munmap)
1725 for (i = 0; i < cam->nbuffers; i++)
1726 if (cam->frame[i].vma_use_count) {
1727 DBG(3, "VIDIOC_S_CROP failed. "
1728 "Unmap the buffers first.");
1732 /* Preserve R,G or B origin */
1733 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1734 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1736 if (rect->width < 4)
1738 if (rect->height < 4)
1740 if (rect->width > bounds->width)
1741 rect->width = bounds->width;
1742 if (rect->height > bounds->height)
1743 rect->height = bounds->height;
1744 if (rect->left < bounds->left)
1745 rect->left = bounds->left;
1746 if (rect->top < bounds->top)
1747 rect->top = bounds->top;
1748 if (rect->left + rect->width > bounds->left + bounds->width)
1749 rect->left = bounds->left+bounds->width - rect->width;
1750 if (rect->top + rect->height > bounds->top + bounds->height)
1751 rect->top = bounds->top+bounds->height - rect->height;
1754 rect->height &= ~3L;
1756 if (ET61X251_PRESERVE_IMGSCALE) {
1757 /* Calculate the actual scaling factor */
1759 a = rect->width * rect->height;
1760 b = pix_format->width * pix_format->height;
1761 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1765 if (cam->stream == STREAM_ON)
1766 if ((err = et61x251_stream_interrupt(cam)))
1769 if (copy_to_user(arg, &crop, sizeof(crop))) {
1770 cam->stream = stream;
1774 if (cam->module_param.force_munmap || cam->io == IO_READ)
1775 et61x251_release_buffers(cam);
1777 err = et61x251_set_crop(cam, rect);
1779 err += s->set_crop(cam, rect);
1780 err += et61x251_set_scale(cam, scale);
1782 if (err) { /* atomic, no rollback in ioctl() */
1783 cam->state |= DEV_MISCONFIGURED;
1784 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1785 "use the camera, close and open /dev/video%d again.",
1786 cam->v4ldev->minor);
1790 s->pix_format.width = rect->width/scale;
1791 s->pix_format.height = rect->height/scale;
1792 memcpy(&(s->_rect), rect, sizeof(*rect));
1794 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1795 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1796 cam->state |= DEV_MISCONFIGURED;
1797 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1798 "use the camera, close and open /dev/video%d again.",
1799 cam->v4ldev->minor);
1803 if (cam->io == IO_READ)
1804 et61x251_empty_framequeues(cam);
1805 else if (cam->module_param.force_munmap)
1806 et61x251_requeue_outqueue(cam);
1808 cam->stream = stream;
1815 et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1817 struct v4l2_fmtdesc fmtd;
1819 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1822 if (fmtd.index == 0) {
1823 strcpy(fmtd.description, "bayer rgb");
1824 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1825 } else if (fmtd.index == 1) {
1826 strcpy(fmtd.description, "compressed");
1827 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1828 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1832 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1833 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1835 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1843 et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1845 struct v4l2_format format;
1846 struct v4l2_pix_format* pfmt = &(cam->sensor->pix_format);
1848 if (copy_from_user(&format, arg, sizeof(format)))
1851 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1854 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1855 ? 0 : (pfmt->width * pfmt->priv) / 8;
1856 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1857 pfmt->field = V4L2_FIELD_NONE;
1858 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1860 if (copy_to_user(arg, &format, sizeof(format)))
1868 et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1871 struct et61x251_sensor* s = cam->sensor;
1872 struct v4l2_format format;
1873 struct v4l2_pix_format* pix;
1874 struct v4l2_pix_format* pfmt = &(s->pix_format);
1875 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1876 struct v4l2_rect rect;
1878 const enum et61x251_stream_state stream = cam->stream;
1879 const u32 nbuffers = cam->nbuffers;
1883 if (copy_from_user(&format, arg, sizeof(format)))
1886 pix = &(format.fmt.pix);
1888 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1891 memcpy(&rect, &(s->_rect), sizeof(rect));
1893 { /* calculate the actual scaling factor */
1895 a = rect.width * rect.height;
1896 b = pix->width * pix->height;
1897 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1900 rect.width = scale * pix->width;
1901 rect.height = scale * pix->height;
1905 if (rect.height < 4)
1907 if (rect.width > bounds->left + bounds->width - rect.left)
1908 rect.width = bounds->left + bounds->width - rect.left;
1909 if (rect.height > bounds->top + bounds->height - rect.top)
1910 rect.height = bounds->top + bounds->height - rect.top;
1915 { /* adjust the scaling factor */
1917 a = rect.width * rect.height;
1918 b = pix->width * pix->height;
1919 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1922 pix->width = rect.width / scale;
1923 pix->height = rect.height / scale;
1925 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
1926 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
1927 pix->pixelformat = pfmt->pixelformat;
1928 pix->priv = pfmt->priv; /* bpp */
1929 pix->colorspace = pfmt->colorspace;
1930 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1931 ? 0 : (pix->width * pix->priv) / 8;
1932 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
1933 pix->field = V4L2_FIELD_NONE;
1935 if (cmd == VIDIOC_TRY_FMT) {
1936 if (copy_to_user(arg, &format, sizeof(format)))
1941 if (cam->module_param.force_munmap)
1942 for (i = 0; i < cam->nbuffers; i++)
1943 if (cam->frame[i].vma_use_count) {
1944 DBG(3, "VIDIOC_S_FMT failed. "
1945 "Unmap the buffers first.");
1949 if (cam->stream == STREAM_ON)
1950 if ((err = et61x251_stream_interrupt(cam)))
1953 if (copy_to_user(arg, &format, sizeof(format))) {
1954 cam->stream = stream;
1958 if (cam->module_param.force_munmap || cam->io == IO_READ)
1959 et61x251_release_buffers(cam);
1961 err += et61x251_set_pix_format(cam, pix);
1962 err += et61x251_set_crop(cam, &rect);
1963 if (s->set_pix_format)
1964 err += s->set_pix_format(cam, pix);
1966 err += s->set_crop(cam, &rect);
1967 err += et61x251_set_scale(cam, scale);
1969 if (err) { /* atomic, no rollback in ioctl() */
1970 cam->state |= DEV_MISCONFIGURED;
1971 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
1972 "use the camera, close and open /dev/video%d again.",
1973 cam->v4ldev->minor);
1977 memcpy(pfmt, pix, sizeof(*pix));
1978 memcpy(&(s->_rect), &rect, sizeof(rect));
1980 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1981 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1982 cam->state |= DEV_MISCONFIGURED;
1983 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
1984 "use the camera, close and open /dev/video%d again.",
1985 cam->v4ldev->minor);
1989 if (cam->io == IO_READ)
1990 et61x251_empty_framequeues(cam);
1991 else if (cam->module_param.force_munmap)
1992 et61x251_requeue_outqueue(cam);
1994 cam->stream = stream;
2001 et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2003 if (copy_to_user(arg, &cam->compression,
2004 sizeof(cam->compression)))
2012 et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2014 struct v4l2_jpegcompression jc;
2015 const enum et61x251_stream_state stream = cam->stream;
2018 if (copy_from_user(&jc, arg, sizeof(jc)))
2021 if (jc.quality != 0 && jc.quality != 1)
2024 if (cam->stream == STREAM_ON)
2025 if ((err = et61x251_stream_interrupt(cam)))
2028 err += et61x251_set_compression(cam, &jc);
2029 if (err) { /* atomic, no rollback in ioctl() */
2030 cam->state |= DEV_MISCONFIGURED;
2031 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2032 "problems. To use the camera, close and open "
2033 "/dev/video%d again.", cam->v4ldev->minor);
2037 cam->compression.quality = jc.quality;
2039 cam->stream = stream;
2046 et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2048 struct v4l2_requestbuffers rb;
2052 if (copy_from_user(&rb, arg, sizeof(rb)))
2055 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2056 rb.memory != V4L2_MEMORY_MMAP)
2059 if (cam->io == IO_READ) {
2060 DBG(3, "Close and open the device again to choose the mmap "
2065 for (i = 0; i < cam->nbuffers; i++)
2066 if (cam->frame[i].vma_use_count) {
2067 DBG(3, "VIDIOC_REQBUFS failed. "
2068 "Previous buffers are still mapped.");
2072 if (cam->stream == STREAM_ON)
2073 if ((err = et61x251_stream_interrupt(cam)))
2076 et61x251_empty_framequeues(cam);
2078 et61x251_release_buffers(cam);
2080 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2082 if (copy_to_user(arg, &rb, sizeof(rb))) {
2083 et61x251_release_buffers(cam);
2088 cam->io = rb.count ? IO_MMAP : IO_NONE;
2095 et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2097 struct v4l2_buffer b;
2099 if (copy_from_user(&b, arg, sizeof(b)))
2102 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2103 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2106 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2108 if (cam->frame[b.index].vma_use_count)
2109 b.flags |= V4L2_BUF_FLAG_MAPPED;
2111 if (cam->frame[b.index].state == F_DONE)
2112 b.flags |= V4L2_BUF_FLAG_DONE;
2113 else if (cam->frame[b.index].state != F_UNUSED)
2114 b.flags |= V4L2_BUF_FLAG_QUEUED;
2116 if (copy_to_user(arg, &b, sizeof(b)))
2124 et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2126 struct v4l2_buffer b;
2127 unsigned long lock_flags;
2129 if (copy_from_user(&b, arg, sizeof(b)))
2132 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2133 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2136 if (cam->frame[b.index].state != F_UNUSED)
2139 cam->frame[b.index].state = F_QUEUED;
2141 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2142 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2143 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2145 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2152 et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2155 struct v4l2_buffer b;
2156 struct et61x251_frame_t *f;
2157 unsigned long lock_flags;
2160 if (copy_from_user(&b, arg, sizeof(b)))
2163 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2166 if (list_empty(&cam->outqueue)) {
2167 if (cam->stream == STREAM_OFF)
2169 if (filp->f_flags & O_NONBLOCK)
2171 err = wait_event_interruptible
2173 (!list_empty(&cam->outqueue)) ||
2174 (cam->state & DEV_DISCONNECTED) ||
2175 (cam->state & DEV_MISCONFIGURED) );
2178 if (cam->state & DEV_DISCONNECTED)
2180 if (cam->state & DEV_MISCONFIGURED)
2184 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2185 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2186 list_del(cam->outqueue.next);
2187 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2189 f->state = F_UNUSED;
2191 memcpy(&b, &f->buf, sizeof(b));
2192 if (f->vma_use_count)
2193 b.flags |= V4L2_BUF_FLAG_MAPPED;
2195 if (copy_to_user(arg, &b, sizeof(b)))
2198 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2205 et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2209 if (copy_from_user(&type, arg, sizeof(type)))
2212 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2215 if (list_empty(&cam->inqueue))
2218 cam->stream = STREAM_ON;
2220 DBG(3, "Stream on");
2227 et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2231 if (copy_from_user(&type, arg, sizeof(type)))
2234 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2237 if (cam->stream == STREAM_ON)
2238 if ((err = et61x251_stream_interrupt(cam)))
2241 et61x251_empty_framequeues(cam);
2243 DBG(3, "Stream off");
2250 et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2252 struct v4l2_streamparm sp;
2254 if (copy_from_user(&sp, arg, sizeof(sp)))
2257 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2260 sp.parm.capture.extendedmode = 0;
2261 sp.parm.capture.readbuffers = cam->nreadbuffers;
2263 if (copy_to_user(arg, &sp, sizeof(sp)))
2271 et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2273 struct v4l2_streamparm sp;
2275 if (copy_from_user(&sp, arg, sizeof(sp)))
2278 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2281 sp.parm.capture.extendedmode = 0;
2283 if (sp.parm.capture.readbuffers == 0)
2284 sp.parm.capture.readbuffers = cam->nreadbuffers;
2286 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2287 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2289 if (copy_to_user(arg, &sp, sizeof(sp)))
2292 cam->nreadbuffers = sp.parm.capture.readbuffers;
2298 static int et61x251_ioctl_v4l2(struct inode* inode, struct file* filp,
2299 unsigned int cmd, void __user * arg)
2301 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2305 case VIDIOC_QUERYCAP:
2306 return et61x251_vidioc_querycap(cam, arg);
2308 case VIDIOC_ENUMINPUT:
2309 return et61x251_vidioc_enuminput(cam, arg);
2311 case VIDIOC_G_INPUT:
2312 case VIDIOC_S_INPUT:
2313 return et61x251_vidioc_gs_input(cam, arg);
2315 case VIDIOC_QUERYCTRL:
2316 return et61x251_vidioc_query_ctrl(cam, arg);
2319 return et61x251_vidioc_g_ctrl(cam, arg);
2321 case VIDIOC_S_CTRL_OLD:
2323 return et61x251_vidioc_s_ctrl(cam, arg);
2325 case VIDIOC_CROPCAP_OLD:
2326 case VIDIOC_CROPCAP:
2327 return et61x251_vidioc_cropcap(cam, arg);
2330 return et61x251_vidioc_g_crop(cam, arg);
2333 return et61x251_vidioc_s_crop(cam, arg);
2335 case VIDIOC_ENUM_FMT:
2336 return et61x251_vidioc_enum_fmt(cam, arg);
2339 return et61x251_vidioc_g_fmt(cam, arg);
2341 case VIDIOC_TRY_FMT:
2343 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2345 case VIDIOC_G_JPEGCOMP:
2346 return et61x251_vidioc_g_jpegcomp(cam, arg);
2348 case VIDIOC_S_JPEGCOMP:
2349 return et61x251_vidioc_s_jpegcomp(cam, arg);
2351 case VIDIOC_REQBUFS:
2352 return et61x251_vidioc_reqbufs(cam, arg);
2354 case VIDIOC_QUERYBUF:
2355 return et61x251_vidioc_querybuf(cam, arg);
2358 return et61x251_vidioc_qbuf(cam, arg);
2361 return et61x251_vidioc_dqbuf(cam, filp, arg);
2363 case VIDIOC_STREAMON:
2364 return et61x251_vidioc_streamon(cam, arg);
2366 case VIDIOC_STREAMOFF:
2367 return et61x251_vidioc_streamoff(cam, arg);
2370 return et61x251_vidioc_g_parm(cam, arg);
2372 case VIDIOC_S_PARM_OLD:
2374 return et61x251_vidioc_s_parm(cam, arg);
2378 case VIDIOC_QUERYSTD:
2379 case VIDIOC_ENUMSTD:
2380 case VIDIOC_QUERYMENU:
2390 static int et61x251_ioctl(struct inode* inode, struct file* filp,
2391 unsigned int cmd, unsigned long arg)
2393 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2396 if (down_interruptible(&cam->fileop_sem))
2397 return -ERESTARTSYS;
2399 if (cam->state & DEV_DISCONNECTED) {
2400 DBG(1, "Device not present");
2401 up(&cam->fileop_sem);
2405 if (cam->state & DEV_MISCONFIGURED) {
2406 DBG(1, "The camera is misconfigured. Close and open it "
2408 up(&cam->fileop_sem);
2412 V4LDBG(3, "et61x251", cmd);
2414 err = et61x251_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
2416 up(&cam->fileop_sem);
2422 static struct file_operations et61x251_fops = {
2423 .owner = THIS_MODULE,
2424 .open = et61x251_open,
2425 .release = et61x251_release,
2426 .ioctl = et61x251_ioctl,
2427 .read = et61x251_read,
2428 .poll = et61x251_poll,
2429 .mmap = et61x251_mmap,
2430 .llseek = no_llseek,
2433 /*****************************************************************************/
2435 /* It exists a single interface only. We do not need to validate anything. */
2437 et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2439 struct usb_device *udev = interface_to_usbdev(intf);
2440 struct et61x251_device* cam;
2441 static unsigned int dev_nr = 0;
2445 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2450 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2451 DBG(1, "kmalloc() failed");
2456 if (!(cam->v4ldev = video_device_alloc())) {
2457 DBG(1, "video_device_alloc() failed");
2462 init_MUTEX(&cam->dev_sem);
2464 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2465 "(vid/pid 0x%04X/0x%04X)",id->idVendor, id->idProduct);
2467 for (i = 0; et61x251_sensor_table[i]; i++) {
2468 err = et61x251_sensor_table[i](cam);
2473 if (!err && cam->sensor)
2474 DBG(2, "%s image sensor detected", cam->sensor->name);
2476 DBG(1, "No supported image sensor detected");
2481 if (et61x251_init(cam)) {
2482 DBG(1, "Initialization failed. I will retry on open().");
2483 cam->state |= DEV_MISCONFIGURED;
2486 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2487 cam->v4ldev->owner = THIS_MODULE;
2488 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
2489 cam->v4ldev->hardware = 0;
2490 cam->v4ldev->fops = &et61x251_fops;
2491 cam->v4ldev->minor = video_nr[dev_nr];
2492 cam->v4ldev->release = video_device_release;
2493 video_set_drvdata(cam->v4ldev, cam);
2495 down(&cam->dev_sem);
2497 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2500 DBG(1, "V4L2 device registration failed");
2501 if (err == -ENFILE && video_nr[dev_nr] == -1)
2502 DBG(1, "Free /dev/videoX node not found");
2503 video_nr[dev_nr] = -1;
2504 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2509 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
2511 cam->module_param.force_munmap = force_munmap[dev_nr];
2513 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2515 #ifdef CONFIG_VIDEO_ADV_DEBUG
2516 et61x251_create_sysfs(cam);
2517 DBG(2, "Optional device control through 'sysfs' interface ready");
2520 usb_set_intfdata(intf, cam);
2528 kfree(cam->control_buffer);
2530 video_device_release(cam->v4ldev);
2537 static void et61x251_usb_disconnect(struct usb_interface* intf)
2539 struct et61x251_device* cam = usb_get_intfdata(intf);
2544 down_write(&et61x251_disconnect);
2546 down(&cam->dev_sem);
2548 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2550 wake_up_interruptible_all(&cam->open);
2553 DBG(2, "Device /dev/video%d is open! Deregistration and "
2554 "memory deallocation are deferred on close.",
2555 cam->v4ldev->minor);
2556 cam->state |= DEV_MISCONFIGURED;
2557 et61x251_stop_transfer(cam);
2558 cam->state |= DEV_DISCONNECTED;
2559 wake_up_interruptible(&cam->wait_frame);
2560 wake_up_interruptible(&cam->wait_stream);
2562 cam->state |= DEV_DISCONNECTED;
2563 et61x251_release_resources(cam);
2571 up_write(&et61x251_disconnect);
2575 static struct usb_driver et61x251_usb_driver = {
2577 .id_table = et61x251_id_table,
2578 .probe = et61x251_usb_probe,
2579 .disconnect = et61x251_usb_disconnect,
2582 /*****************************************************************************/
2584 static int __init et61x251_module_init(void)
2588 KDBG(2, ET61X251_MODULE_NAME " v" ET61X251_MODULE_VERSION);
2589 KDBG(3, ET61X251_MODULE_AUTHOR);
2591 if ((err = usb_register(&et61x251_usb_driver)))
2592 KDBG(1, "usb_register() failed");
2598 static void __exit et61x251_module_exit(void)
2600 usb_deregister(&et61x251_usb_driver);
2604 module_init(et61x251_module_init);
2605 module_exit(et61x251_module_exit);