2 * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
4 * Copyright (C) 2006 Nicolas VIVIEN
5 * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
7 * Some parts are inspired from cafe_ccic.c
8 * Copyright 2006-2007 Jonathan Corbet
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/errno.h>
29 #include <linux/slab.h>
31 #include <linux/usb.h>
33 #include <linux/vmalloc.h>
34 #include <linux/videodev2.h>
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-ioctl.h>
38 #include "stk-webcam.h"
42 module_param(hflip, bool, 0444);
43 MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
46 module_param(vflip, bool, 0444);
47 MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
50 module_param(debug, int, 0444);
51 MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
53 MODULE_LICENSE("GPL");
54 MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
55 MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
59 /* Some cameras have audio interfaces, we aren't interested in those */
60 static struct usb_device_id stkwebcam_table[] = {
61 { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
62 { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
65 MODULE_DEVICE_TABLE(usb, stkwebcam_table);
70 int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
72 struct usb_device *udev = dev->udev;
75 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
77 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
89 int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
91 struct usb_device *udev = dev->udev;
94 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
96 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
108 static int stk_start_stream(struct stk_camera *dev)
112 int value_116, value_117;
114 if (!is_present(dev))
116 if (!is_memallocd(dev) || !is_initialised(dev)) {
117 STK_ERROR("FIXME: Buffers are not allocated\n");
120 ret = usb_set_interface(dev->udev, 0, 5);
123 STK_ERROR("usb_set_interface failed !\n");
124 if (stk_sensor_wakeup(dev))
125 STK_ERROR("error awaking the sensor\n");
127 stk_camera_read_reg(dev, 0x0116, &value_116);
128 stk_camera_read_reg(dev, 0x0117, &value_117);
130 stk_camera_write_reg(dev, 0x0116, 0x0000);
131 stk_camera_write_reg(dev, 0x0117, 0x0000);
133 stk_camera_read_reg(dev, 0x0100, &value);
134 stk_camera_write_reg(dev, 0x0100, value | 0x80);
136 stk_camera_write_reg(dev, 0x0116, value_116);
137 stk_camera_write_reg(dev, 0x0117, value_117);
138 for (i = 0; i < MAX_ISO_BUFS; i++) {
139 if (dev->isobufs[i].urb) {
140 ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
141 atomic_inc(&dev->urbs_used);
150 static int stk_stop_stream(struct stk_camera *dev)
154 if (is_present(dev)) {
155 stk_camera_read_reg(dev, 0x0100, &value);
156 stk_camera_write_reg(dev, 0x0100, value & ~0x80);
157 if (dev->isobufs != NULL) {
158 for (i = 0; i < MAX_ISO_BUFS; i++) {
159 if (dev->isobufs[i].urb)
160 usb_kill_urb(dev->isobufs[i].urb);
163 unset_streaming(dev);
165 if (usb_set_interface(dev->udev, 0, 0))
166 STK_ERROR("usb_set_interface failed !\n");
167 if (stk_sensor_sleep(dev))
168 STK_ERROR("error suspending the sensor\n");
174 * This seems to be the shortest init sequence we
175 * must do in order to find the sensor
176 * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
177 * is also reset. Maybe powers down it?
178 * Rest of values don't make a difference
181 static struct regval stk1125_initvals[] = {
182 /*TODO: What means this sequence? */
211 static int stk_initialise(struct stk_camera *dev)
215 if (!is_present(dev))
217 if (is_initialised(dev))
219 rv = stk1125_initvals;
220 while (rv->reg != 0xffff) {
221 ret = stk_camera_write_reg(dev, rv->reg, rv->val);
226 if (stk_sensor_init(dev) == 0) {
227 set_initialised(dev);
233 /* *********************************************** */
235 * This function is called as an URB transfert is complete (Isochronous pipe).
236 * So, the traitement is done in interrupt time, so it has be fast, not crash,
237 * and not stall. Neat.
239 static void stk_isoc_handler(struct urb *urb)
246 unsigned char *fill = NULL;
247 unsigned char *iso_buf = NULL;
249 struct stk_camera *dev;
250 struct stk_sio_buffer *fb;
252 dev = (struct stk_camera *) urb->context;
255 STK_ERROR("isoc_handler called with NULL device !\n");
259 if (urb->status == -ENOENT || urb->status == -ECONNRESET
260 || urb->status == -ESHUTDOWN) {
261 atomic_dec(&dev->urbs_used);
265 spin_lock_irqsave(&dev->spinlock, flags);
267 if (urb->status != -EINPROGRESS && urb->status != 0) {
268 STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
272 if (list_empty(&dev->sio_avail)) {
273 /*FIXME Stop streaming after a while */
274 (void) (printk_ratelimit() &&
275 STK_ERROR("isoc_handler without available buffer!\n"));
278 fb = list_first_entry(&dev->sio_avail,
279 struct stk_sio_buffer, list);
280 fill = fb->buffer + fb->v4lbuf.bytesused;
282 for (i = 0; i < urb->number_of_packets; i++) {
283 if (urb->iso_frame_desc[i].status != 0) {
284 if (urb->iso_frame_desc[i].status != -EXDEV)
285 STK_ERROR("Frame %d has error %d\n", i,
286 urb->iso_frame_desc[i].status);
289 framelen = urb->iso_frame_desc[i].actual_length;
290 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
293 continue; /* no data */
296 * we found something informational from there
297 * the isoc frames have to type of headers
298 * type1: 00 xx 00 00 or 20 xx 00 00
299 * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
300 * xx is a sequencer which has never been seen over 0x3f
301 * imho data written down looks like bayer, i see similarities
302 * after every 640 bytes
304 if (*iso_buf & 0x80) {
307 /* This marks a new frame */
308 if (fb->v4lbuf.bytesused != 0
309 && fb->v4lbuf.bytesused != dev->frame_size) {
310 (void) (printk_ratelimit() &&
311 STK_ERROR("frame %d, "
312 "bytesused=%d, skipping\n",
313 i, fb->v4lbuf.bytesused));
314 fb->v4lbuf.bytesused = 0;
316 } else if (fb->v4lbuf.bytesused == dev->frame_size) {
317 if (list_is_singular(&dev->sio_avail)) {
318 /* Always reuse the last buffer */
319 fb->v4lbuf.bytesused = 0;
322 list_move_tail(dev->sio_avail.next,
324 wake_up(&dev->wait_frame);
325 fb = list_first_entry(&dev->sio_avail,
326 struct stk_sio_buffer, list);
327 fb->v4lbuf.bytesused = 0;
336 /* Our buffer is full !!! */
337 if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
338 (void) (printk_ratelimit() &&
339 STK_ERROR("Frame buffer overflow, lost sync\n"));
340 /*FIXME Do something here? */
343 spin_unlock_irqrestore(&dev->spinlock, flags);
344 memcpy(fill, iso_buf, framelen);
345 spin_lock_irqsave(&dev->spinlock, flags);
348 /* New size of our buffer */
349 fb->v4lbuf.bytesused += framelen;
353 spin_unlock_irqrestore(&dev->spinlock, flags);
354 urb->dev = dev->udev;
355 ret = usb_submit_urb(urb, GFP_ATOMIC);
357 STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
362 /* -------------------------------------------- */
364 static int stk_prepare_iso(struct stk_camera *dev)
369 struct usb_device *udev;
376 STK_ERROR("isobufs already allocated. Bad\n");
378 dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
380 if (dev->isobufs == NULL) {
381 STK_ERROR("Unable to allocate iso buffers\n");
384 for (i = 0; i < MAX_ISO_BUFS; i++) {
385 if (dev->isobufs[i].data == NULL) {
386 kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
388 STK_ERROR("Failed to allocate iso buffer %d\n",
392 dev->isobufs[i].data = kbuf;
394 STK_ERROR("isobuf data already allocated\n");
395 if (dev->isobufs[i].urb == NULL) {
396 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
398 STK_ERROR("Failed to allocate URB %d\n", i);
401 dev->isobufs[i].urb = urb;
403 STK_ERROR("Killing URB\n");
404 usb_kill_urb(dev->isobufs[i].urb);
405 urb = dev->isobufs[i].urb;
409 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
410 urb->transfer_flags = URB_ISO_ASAP;
411 urb->transfer_buffer = dev->isobufs[i].data;
412 urb->transfer_buffer_length = ISO_BUFFER_SIZE;
413 urb->complete = stk_isoc_handler;
415 urb->start_frame = 0;
416 urb->number_of_packets = ISO_FRAMES_PER_DESC;
418 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
419 urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
420 urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
427 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
428 kfree(dev->isobufs[i].data);
429 for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
430 usb_free_urb(dev->isobufs[i].urb);
436 static void stk_clean_iso(struct stk_camera *dev)
440 if (dev == NULL || dev->isobufs == NULL)
443 for (i = 0; i < MAX_ISO_BUFS; i++) {
446 urb = dev->isobufs[i].urb;
448 if (atomic_read(&dev->urbs_used) && is_present(dev))
452 kfree(dev->isobufs[i].data);
456 unset_memallocd(dev);
459 static int stk_setup_siobuf(struct stk_camera *dev, int index)
461 struct stk_sio_buffer *buf = dev->sio_bufs + index;
462 INIT_LIST_HEAD(&buf->list);
463 buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
464 buf->buffer = vmalloc_user(buf->v4lbuf.length);
465 if (buf->buffer == NULL)
469 buf->v4lbuf.index = index;
470 buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
471 buf->v4lbuf.field = V4L2_FIELD_NONE;
472 buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
473 buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
477 static int stk_free_sio_buffers(struct stk_camera *dev)
482 if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
485 * If any buffers are mapped, we cannot free them at all.
487 for (i = 0; i < dev->n_sbufs; i++) {
488 if (dev->sio_bufs[i].mapcount > 0)
494 spin_lock_irqsave(&dev->spinlock, flags);
495 INIT_LIST_HEAD(&dev->sio_avail);
496 INIT_LIST_HEAD(&dev->sio_full);
497 nbufs = dev->n_sbufs;
499 spin_unlock_irqrestore(&dev->spinlock, flags);
500 for (i = 0; i < nbufs; i++) {
501 if (dev->sio_bufs[i].buffer != NULL)
502 vfree(dev->sio_bufs[i].buffer);
504 kfree(dev->sio_bufs);
505 dev->sio_bufs = NULL;
509 static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
512 if (dev->sio_bufs != NULL)
513 STK_ERROR("sio_bufs already allocated\n");
515 dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
517 if (dev->sio_bufs == NULL)
519 for (i = 0; i < n_sbufs; i++) {
520 if (stk_setup_siobuf(dev, i))
521 return (dev->n_sbufs > 1)? 0 : -ENOMEM;
528 static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
531 err = stk_prepare_iso(dev);
536 err = stk_prepare_sio_buffers(dev, n_sbufs);
538 stk_free_sio_buffers(dev);
544 static void stk_free_buffers(struct stk_camera *dev)
547 stk_free_sio_buffers(dev);
549 /* -------------------------------------------- */
551 /* v4l file operations */
553 static int v4l_stk_open(struct file *fp)
555 struct stk_camera *dev;
556 struct video_device *vdev;
558 vdev = video_devdata(fp);
559 dev = vdev_to_camera(vdev);
561 if (dev == NULL || !is_present(dev)) {
564 fp->private_data = dev;
565 usb_autopm_get_interface(dev->interface);
570 static int v4l_stk_release(struct file *fp)
572 struct stk_camera *dev = fp->private_data;
574 if (dev->owner == fp) {
575 stk_stop_stream(dev);
576 stk_free_buffers(dev);
577 stk_camera_write_reg(dev, 0x0, 0x48); /* turn off the LED */
578 unset_initialised(dev);
583 usb_autopm_put_interface(dev->interface);
588 static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
589 size_t count, loff_t *f_pos)
594 struct stk_sio_buffer *sbuf;
595 struct stk_camera *dev = fp->private_data;
597 if (!is_present(dev))
599 if (dev->owner && dev->owner != fp)
602 if (!is_streaming(dev)) {
603 if (stk_initialise(dev)
604 || stk_allocate_buffers(dev, 3)
605 || stk_start_stream(dev))
607 spin_lock_irqsave(&dev->spinlock, flags);
608 for (i = 0; i < dev->n_sbufs; i++) {
609 list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
610 dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
612 spin_unlock_irqrestore(&dev->spinlock, flags);
615 if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
617 ret = wait_event_interruptible(dev->wait_frame,
618 !list_empty(&dev->sio_full) || !is_present(dev));
621 if (!is_present(dev))
624 if (count + *f_pos > dev->frame_size)
625 count = dev->frame_size - *f_pos;
626 spin_lock_irqsave(&dev->spinlock, flags);
627 if (list_empty(&dev->sio_full)) {
628 spin_unlock_irqrestore(&dev->spinlock, flags);
629 STK_ERROR("BUG: No siobufs ready\n");
632 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
633 spin_unlock_irqrestore(&dev->spinlock, flags);
635 if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
640 if (*f_pos >= dev->frame_size) {
642 spin_lock_irqsave(&dev->spinlock, flags);
643 list_move_tail(&sbuf->list, &dev->sio_avail);
644 spin_unlock_irqrestore(&dev->spinlock, flags);
649 static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
651 struct stk_camera *dev = fp->private_data;
653 poll_wait(fp, &dev->wait_frame, wait);
655 if (!is_present(dev))
658 if (!list_empty(&dev->sio_full))
659 return (POLLIN | POLLRDNORM);
665 static void stk_v4l_vm_open(struct vm_area_struct *vma)
667 struct stk_sio_buffer *sbuf = vma->vm_private_data;
670 static void stk_v4l_vm_close(struct vm_area_struct *vma)
672 struct stk_sio_buffer *sbuf = vma->vm_private_data;
674 if (sbuf->mapcount == 0)
675 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
677 static const struct vm_operations_struct stk_v4l_vm_ops = {
678 .open = stk_v4l_vm_open,
679 .close = stk_v4l_vm_close
682 static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
686 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
687 struct stk_camera *dev = fp->private_data;
688 struct stk_sio_buffer *sbuf = NULL;
690 if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
693 for (i = 0; i < dev->n_sbufs; i++) {
694 if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
695 sbuf = dev->sio_bufs + i;
701 ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
704 vma->vm_flags |= VM_DONTEXPAND;
705 vma->vm_private_data = sbuf;
706 vma->vm_ops = &stk_v4l_vm_ops;
707 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
708 stk_v4l_vm_open(vma);
712 /* v4l ioctl handlers */
714 static int stk_vidioc_querycap(struct file *filp,
715 void *priv, struct v4l2_capability *cap)
717 strcpy(cap->driver, "stk");
718 strcpy(cap->card, "stk");
719 cap->version = DRIVER_VERSION_NUM;
721 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
722 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
726 static int stk_vidioc_enum_input(struct file *filp,
727 void *priv, struct v4l2_input *input)
729 if (input->index != 0)
732 strcpy(input->name, "Syntek USB Camera");
733 input->type = V4L2_INPUT_TYPE_CAMERA;
738 static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
744 static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
753 static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
758 /* List of all V4Lv2 controls supported by the driver */
759 static struct v4l2_queryctrl stk_controls[] = {
761 .id = V4L2_CID_BRIGHTNESS,
762 .type = V4L2_CTRL_TYPE_INTEGER,
763 .name = "Brightness",
767 .default_value = 0x6000,
770 .id = V4L2_CID_HFLIP,
771 .type = V4L2_CTRL_TYPE_BOOLEAN,
772 .name = "Horizontal Flip",
779 .id = V4L2_CID_VFLIP,
780 .type = V4L2_CTRL_TYPE_BOOLEAN,
781 .name = "Vertical Flip",
789 static int stk_vidioc_queryctrl(struct file *filp,
790 void *priv, struct v4l2_queryctrl *c)
794 nbr = ARRAY_SIZE(stk_controls);
796 for (i = 0; i < nbr; i++) {
797 if (stk_controls[i].id == c->id) {
798 memcpy(c, &stk_controls[i],
799 sizeof(struct v4l2_queryctrl));
806 static int stk_vidioc_g_ctrl(struct file *filp,
807 void *priv, struct v4l2_control *c)
809 struct stk_camera *dev = priv;
811 case V4L2_CID_BRIGHTNESS:
812 c->value = dev->vsettings.brightness;
815 c->value = dev->vsettings.hflip;
818 c->value = dev->vsettings.vflip;
826 static int stk_vidioc_s_ctrl(struct file *filp,
827 void *priv, struct v4l2_control *c)
829 struct stk_camera *dev = priv;
831 case V4L2_CID_BRIGHTNESS:
832 dev->vsettings.brightness = c->value;
833 return stk_sensor_set_brightness(dev, c->value >> 8);
835 dev->vsettings.hflip = c->value;
838 dev->vsettings.vflip = c->value;
847 static int stk_vidioc_enum_fmt_vid_cap(struct file *filp,
848 void *priv, struct v4l2_fmtdesc *fmtd)
850 switch (fmtd->index) {
852 fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
853 strcpy(fmtd->description, "r5g6b5");
856 fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
857 strcpy(fmtd->description, "r5g6b5BE");
860 fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
861 strcpy(fmtd->description, "yuv4:2:2");
864 fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
865 strcpy(fmtd->description, "Raw bayer");
868 fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
869 strcpy(fmtd->description, "yuv4:2:2");
877 static struct stk_size {
882 { .w = 1280, .h = 1024, .m = MODE_SXGA, },
883 { .w = 640, .h = 480, .m = MODE_VGA, },
884 { .w = 352, .h = 288, .m = MODE_CIF, },
885 { .w = 320, .h = 240, .m = MODE_QVGA, },
886 { .w = 176, .h = 144, .m = MODE_QCIF, },
889 static int stk_vidioc_g_fmt_vid_cap(struct file *filp,
890 void *priv, struct v4l2_format *f)
892 struct v4l2_pix_format *pix_format = &f->fmt.pix;
893 struct stk_camera *dev = priv;
896 for (i = 0; i < ARRAY_SIZE(stk_sizes)
897 && stk_sizes[i].m != dev->vsettings.mode;
899 if (i == ARRAY_SIZE(stk_sizes)) {
900 STK_ERROR("ERROR: mode invalid\n");
903 pix_format->width = stk_sizes[i].w;
904 pix_format->height = stk_sizes[i].h;
905 pix_format->field = V4L2_FIELD_NONE;
906 pix_format->colorspace = V4L2_COLORSPACE_SRGB;
907 pix_format->pixelformat = dev->vsettings.palette;
908 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
909 pix_format->bytesperline = pix_format->width;
911 pix_format->bytesperline = 2 * pix_format->width;
912 pix_format->sizeimage = pix_format->bytesperline
913 * pix_format->height;
917 static int stk_vidioc_try_fmt_vid_cap(struct file *filp,
918 void *priv, struct v4l2_format *fmtd)
921 switch (fmtd->fmt.pix.pixelformat) {
922 case V4L2_PIX_FMT_RGB565:
923 case V4L2_PIX_FMT_RGB565X:
924 case V4L2_PIX_FMT_UYVY:
925 case V4L2_PIX_FMT_YUYV:
926 case V4L2_PIX_FMT_SBGGR8:
931 for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
932 if (fmtd->fmt.pix.width > stk_sizes[i].w)
935 if (i == ARRAY_SIZE(stk_sizes)
936 || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
937 < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
938 fmtd->fmt.pix.height = stk_sizes[i-1].h;
939 fmtd->fmt.pix.width = stk_sizes[i-1].w;
940 fmtd->fmt.pix.priv = i - 1;
942 fmtd->fmt.pix.height = stk_sizes[i].h;
943 fmtd->fmt.pix.width = stk_sizes[i].w;
944 fmtd->fmt.pix.priv = i;
947 fmtd->fmt.pix.field = V4L2_FIELD_NONE;
948 fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
949 if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
950 fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
952 fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
953 fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
954 * fmtd->fmt.pix.height;
958 static int stk_setup_format(struct stk_camera *dev)
962 if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
966 while (i < ARRAY_SIZE(stk_sizes) &&
967 stk_sizes[i].m != dev->vsettings.mode)
969 if (i == ARRAY_SIZE(stk_sizes)) {
970 STK_ERROR("Something is broken in %s\n", __func__);
973 /* This registers controls some timings, not sure of what. */
974 stk_camera_write_reg(dev, 0x001b, 0x0e);
975 if (dev->vsettings.mode == MODE_SXGA)
976 stk_camera_write_reg(dev, 0x001c, 0x0e);
978 stk_camera_write_reg(dev, 0x001c, 0x46);
980 * Registers 0x0115 0x0114 are the size of each line (bytes),
981 * regs 0x0117 0x0116 are the heigth of the image.
983 stk_camera_write_reg(dev, 0x0115,
984 ((stk_sizes[i].w * depth) >> 8) & 0xff);
985 stk_camera_write_reg(dev, 0x0114,
986 (stk_sizes[i].w * depth) & 0xff);
987 stk_camera_write_reg(dev, 0x0117,
988 (stk_sizes[i].h >> 8) & 0xff);
989 stk_camera_write_reg(dev, 0x0116,
990 stk_sizes[i].h & 0xff);
991 return stk_sensor_configure(dev);
994 static int stk_vidioc_s_fmt_vid_cap(struct file *filp,
995 void *priv, struct v4l2_format *fmtd)
998 struct stk_camera *dev = priv;
1002 if (!is_present(dev))
1004 if (is_streaming(dev))
1006 if (dev->owner && dev->owner != filp)
1008 ret = stk_vidioc_try_fmt_vid_cap(filp, priv, fmtd);
1013 dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
1014 stk_free_buffers(dev);
1015 dev->frame_size = fmtd->fmt.pix.sizeimage;
1016 dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
1018 stk_initialise(dev);
1019 return stk_setup_format(dev);
1022 static int stk_vidioc_reqbufs(struct file *filp,
1023 void *priv, struct v4l2_requestbuffers *rb)
1025 struct stk_camera *dev = priv;
1029 if (rb->memory != V4L2_MEMORY_MMAP)
1031 if (is_streaming(dev)
1032 || (dev->owner && dev->owner != filp))
1036 /*FIXME If they ask for zero, we must stop streaming and free */
1039 /* Arbitrary limit */
1040 else if (rb->count > 5)
1043 stk_allocate_buffers(dev, rb->count);
1044 rb->count = dev->n_sbufs;
1048 static int stk_vidioc_querybuf(struct file *filp,
1049 void *priv, struct v4l2_buffer *buf)
1051 struct stk_camera *dev = priv;
1052 struct stk_sio_buffer *sbuf;
1054 if (buf->index >= dev->n_sbufs)
1056 sbuf = dev->sio_bufs + buf->index;
1057 *buf = sbuf->v4lbuf;
1061 static int stk_vidioc_qbuf(struct file *filp,
1062 void *priv, struct v4l2_buffer *buf)
1064 struct stk_camera *dev = priv;
1065 struct stk_sio_buffer *sbuf;
1066 unsigned long flags;
1068 if (buf->memory != V4L2_MEMORY_MMAP)
1071 if (buf->index >= dev->n_sbufs)
1073 sbuf = dev->sio_bufs + buf->index;
1074 if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
1076 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
1077 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
1078 spin_lock_irqsave(&dev->spinlock, flags);
1079 list_add_tail(&sbuf->list, &dev->sio_avail);
1080 *buf = sbuf->v4lbuf;
1081 spin_unlock_irqrestore(&dev->spinlock, flags);
1085 static int stk_vidioc_dqbuf(struct file *filp,
1086 void *priv, struct v4l2_buffer *buf)
1088 struct stk_camera *dev = priv;
1089 struct stk_sio_buffer *sbuf;
1090 unsigned long flags;
1093 if (!is_streaming(dev))
1096 if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
1097 return -EWOULDBLOCK;
1098 ret = wait_event_interruptible(dev->wait_frame,
1099 !list_empty(&dev->sio_full) || !is_present(dev));
1102 if (!is_present(dev))
1105 spin_lock_irqsave(&dev->spinlock, flags);
1106 sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
1107 list_del_init(&sbuf->list);
1108 spin_unlock_irqrestore(&dev->spinlock, flags);
1109 sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
1110 sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
1111 sbuf->v4lbuf.sequence = ++dev->sequence;
1112 do_gettimeofday(&sbuf->v4lbuf.timestamp);
1114 *buf = sbuf->v4lbuf;
1118 static int stk_vidioc_streamon(struct file *filp,
1119 void *priv, enum v4l2_buf_type type)
1121 struct stk_camera *dev = priv;
1122 if (is_streaming(dev))
1124 if (dev->sio_bufs == NULL)
1127 return stk_start_stream(dev);
1130 static int stk_vidioc_streamoff(struct file *filp,
1131 void *priv, enum v4l2_buf_type type)
1133 struct stk_camera *dev = priv;
1134 unsigned long flags;
1136 stk_stop_stream(dev);
1137 spin_lock_irqsave(&dev->spinlock, flags);
1138 INIT_LIST_HEAD(&dev->sio_avail);
1139 INIT_LIST_HEAD(&dev->sio_full);
1140 for (i = 0; i < dev->n_sbufs; i++) {
1141 INIT_LIST_HEAD(&dev->sio_bufs[i].list);
1142 dev->sio_bufs[i].v4lbuf.flags = 0;
1144 spin_unlock_irqrestore(&dev->spinlock, flags);
1149 static int stk_vidioc_g_parm(struct file *filp,
1150 void *priv, struct v4l2_streamparm *sp)
1152 /*FIXME This is not correct */
1153 sp->parm.capture.timeperframe.numerator = 1;
1154 sp->parm.capture.timeperframe.denominator = 30;
1155 sp->parm.capture.readbuffers = 2;
1159 static int stk_vidioc_enum_framesizes(struct file *filp,
1160 void *priv, struct v4l2_frmsizeenum *frms)
1162 if (frms->index >= ARRAY_SIZE(stk_sizes))
1164 switch (frms->pixel_format) {
1165 case V4L2_PIX_FMT_RGB565:
1166 case V4L2_PIX_FMT_RGB565X:
1167 case V4L2_PIX_FMT_UYVY:
1168 case V4L2_PIX_FMT_YUYV:
1169 case V4L2_PIX_FMT_SBGGR8:
1170 frms->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1171 frms->discrete.width = stk_sizes[frms->index].w;
1172 frms->discrete.height = stk_sizes[frms->index].h;
1174 default: return -EINVAL;
1178 static struct v4l2_file_operations v4l_stk_fops = {
1179 .owner = THIS_MODULE,
1180 .open = v4l_stk_open,
1181 .release = v4l_stk_release,
1182 .read = v4l_stk_read,
1183 .poll = v4l_stk_poll,
1184 .mmap = v4l_stk_mmap,
1185 .ioctl = video_ioctl2,
1188 static const struct v4l2_ioctl_ops v4l_stk_ioctl_ops = {
1189 .vidioc_querycap = stk_vidioc_querycap,
1190 .vidioc_enum_fmt_vid_cap = stk_vidioc_enum_fmt_vid_cap,
1191 .vidioc_try_fmt_vid_cap = stk_vidioc_try_fmt_vid_cap,
1192 .vidioc_s_fmt_vid_cap = stk_vidioc_s_fmt_vid_cap,
1193 .vidioc_g_fmt_vid_cap = stk_vidioc_g_fmt_vid_cap,
1194 .vidioc_enum_input = stk_vidioc_enum_input,
1195 .vidioc_s_input = stk_vidioc_s_input,
1196 .vidioc_g_input = stk_vidioc_g_input,
1197 .vidioc_s_std = stk_vidioc_s_std,
1198 .vidioc_reqbufs = stk_vidioc_reqbufs,
1199 .vidioc_querybuf = stk_vidioc_querybuf,
1200 .vidioc_qbuf = stk_vidioc_qbuf,
1201 .vidioc_dqbuf = stk_vidioc_dqbuf,
1202 .vidioc_streamon = stk_vidioc_streamon,
1203 .vidioc_streamoff = stk_vidioc_streamoff,
1204 .vidioc_queryctrl = stk_vidioc_queryctrl,
1205 .vidioc_g_ctrl = stk_vidioc_g_ctrl,
1206 .vidioc_s_ctrl = stk_vidioc_s_ctrl,
1207 .vidioc_g_parm = stk_vidioc_g_parm,
1208 .vidioc_enum_framesizes = stk_vidioc_enum_framesizes,
1211 static void stk_v4l_dev_release(struct video_device *vd)
1213 struct stk_camera *dev = vdev_to_camera(vd);
1215 if (dev->sio_bufs != NULL || dev->isobufs != NULL)
1216 STK_ERROR("We are leaking memory\n");
1217 usb_put_intf(dev->interface);
1221 static struct video_device stk_v4l_data = {
1222 .name = "stkwebcam",
1223 .tvnorms = V4L2_STD_UNKNOWN,
1224 .current_norm = V4L2_STD_UNKNOWN,
1225 .fops = &v4l_stk_fops,
1226 .ioctl_ops = &v4l_stk_ioctl_ops,
1227 .release = stk_v4l_dev_release,
1231 static int stk_register_video_device(struct stk_camera *dev)
1235 dev->vdev = stk_v4l_data;
1236 dev->vdev.debug = debug;
1237 dev->vdev.parent = &dev->interface->dev;
1238 err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
1240 STK_ERROR("v4l registration failed\n");
1242 STK_INFO("Syntek USB2.0 Camera is now controlling device %s\n",
1243 video_device_node_name(&dev->vdev));
1250 static int stk_camera_probe(struct usb_interface *interface,
1251 const struct usb_device_id *id)
1256 struct stk_camera *dev = NULL;
1257 struct usb_device *udev = interface_to_usbdev(interface);
1258 struct usb_host_interface *iface_desc;
1259 struct usb_endpoint_descriptor *endpoint;
1261 dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
1263 STK_ERROR("Out of memory !\n");
1267 spin_lock_init(&dev->spinlock);
1268 init_waitqueue_head(&dev->wait_frame);
1271 dev->interface = interface;
1272 usb_get_intf(interface);
1274 dev->vsettings.vflip = vflip;
1275 dev->vsettings.hflip = hflip;
1279 /* Set up the endpoint information
1280 * use only the first isoc-in endpoint
1281 * for the current alternate setting */
1282 iface_desc = interface->cur_altsetting;
1284 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1285 endpoint = &iface_desc->endpoint[i].desc;
1288 && usb_endpoint_is_isoc_in(endpoint)) {
1289 /* we found an isoc in endpoint */
1290 dev->isoc_ep = usb_endpoint_num(endpoint);
1294 if (!dev->isoc_ep) {
1295 STK_ERROR("Could not find isoc-in endpoint");
1299 dev->vsettings.brightness = 0x7fff;
1300 dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
1301 dev->vsettings.mode = MODE_VGA;
1302 dev->frame_size = 640 * 480 * 2;
1304 INIT_LIST_HEAD(&dev->sio_avail);
1305 INIT_LIST_HEAD(&dev->sio_full);
1307 usb_set_intfdata(interface, dev);
1309 err = stk_register_video_device(dev);
1321 static void stk_camera_disconnect(struct usb_interface *interface)
1323 struct stk_camera *dev = usb_get_intfdata(interface);
1325 usb_set_intfdata(interface, NULL);
1328 wake_up_interruptible(&dev->wait_frame);
1330 STK_INFO("Syntek USB2.0 Camera release resources device %s\n",
1331 video_device_node_name(&dev->vdev));
1333 video_unregister_device(&dev->vdev);
1337 static int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
1339 struct stk_camera *dev = usb_get_intfdata(intf);
1340 if (is_streaming(dev)) {
1341 stk_stop_stream(dev);
1342 /* yes, this is ugly */
1348 static int stk_camera_resume(struct usb_interface *intf)
1350 struct stk_camera *dev = usb_get_intfdata(intf);
1351 if (!is_initialised(dev))
1353 unset_initialised(dev);
1354 stk_initialise(dev);
1355 stk_setup_format(dev);
1356 if (is_streaming(dev))
1357 stk_start_stream(dev);
1362 static struct usb_driver stk_camera_driver = {
1363 .name = "stkwebcam",
1364 .probe = stk_camera_probe,
1365 .disconnect = stk_camera_disconnect,
1366 .id_table = stkwebcam_table,
1368 .suspend = stk_camera_suspend,
1369 .resume = stk_camera_resume,
1374 static int __init stk_camera_init(void)
1378 result = usb_register(&stk_camera_driver);
1380 STK_ERROR("usb_register failed ! Error number %d\n", result);
1386 static void __exit stk_camera_exit(void)
1388 usb_deregister(&stk_camera_driver);
1391 module_init(stk_camera_init);
1392 module_exit(stk_camera_exit);