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authorJaime Velasco Juan <jsagarribay@gmail.com>2008-01-12 06:48:14 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-01-25 19:04:54 -0200
commitec16dae5453eafd1586f35c4ec1ef854e5a808e0 (patch)
tree3811349160986ec7da781785de57cf23cf2192bb /drivers/media/video/stk-webcam.c
parentb6667e5fb8c478e65768fdb18fa6576ac1634068 (diff)
V4L/DVB (7019): V4L: add support for Syntek DC1125 webcams
This driver supports cameras with USB ID 174f:a311 or 05e1:0501, and the ov965x sensors. These devices are found in some Asus laptops and probably somewhere else. It is based on the stk11xx driver written by Nicolas Vivien Signed-off-by: Jaime Velasco Juan <jsagarribay@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/stk-webcam.c')
-rw-r--r--drivers/media/video/stk-webcam.c1465
1 files changed, 1465 insertions, 0 deletions
diff --git a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c
new file mode 100644
index 000000000000..f300eca3c473
--- /dev/null
+++ b/drivers/media/video/stk-webcam.c
@@ -0,0 +1,1465 @@
+/*
+ * stk-webcam.c : Driver for Syntek 1125 USB webcam controller
+ *
+ * Copyright (C) 2006 Nicolas VIVIEN
+ * Copyright 2007-2008 Jaime Velasco Juan <jsagarribay@gmail.com>
+ *
+ * Some parts are inspired from cafe_ccic.c
+ * Copyright 2006-2007 Jonathan Corbet
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/kref.h>
+
+#include <linux/usb.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <linux/vmalloc.h>
+
+#include "stk-webcam.h"
+
+
+static int hflip = 1;
+module_param(hflip, bool, 0444);
+MODULE_PARM_DESC(hflip, "Horizontal image flip (mirror). Defaults to 1");
+
+static int vflip = 1;
+module_param(vflip, bool, 0444);
+MODULE_PARM_DESC(vflip, "Vertical image flip. Defaults to 1");
+
+static int debug;
+module_param(debug, int, 0444);
+MODULE_PARM_DESC(debug, "Debug v4l ioctls. Defaults to 0");
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jaime Velasco Juan <jsagarribay@gmail.com> and Nicolas VIVIEN");
+MODULE_DESCRIPTION("Syntek DC1125 webcam driver");
+
+
+
+/* Some cameras have audio interfaces, we aren't interested in those */
+static struct usb_device_id stkwebcam_table[] = {
+ { USB_DEVICE_AND_INTERFACE_INFO(0x174f, 0xa311, 0xff, 0xff, 0xff) },
+ { USB_DEVICE_AND_INTERFACE_INFO(0x05e1, 0x0501, 0xff, 0xff, 0xff) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, stkwebcam_table);
+
+void stk_camera_cleanup(struct kref *kref)
+{
+ struct stk_camera *dev = to_stk_camera(kref);
+
+ STK_INFO("Syntek USB2.0 Camera release resources"
+ " video device /dev/video%d\n", dev->vdev.minor);
+ video_unregister_device(&dev->vdev);
+ dev->vdev.priv = NULL;
+
+ if (dev->sio_bufs != NULL || dev->isobufs != NULL)
+ STK_ERROR("We are leaking memory\n");
+ usb_put_intf(dev->interface);
+ kfree(dev);
+}
+
+
+/*
+ * Basic stuff
+ */
+int stk_camera_write_reg(struct stk_camera *dev, u16 index, u8 value)
+{
+ struct usb_device *udev = dev->udev;
+ int ret;
+
+ ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ 0x01,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ value,
+ index,
+ NULL,
+ 0,
+ 500);
+ if (ret < 0)
+ return ret;
+ else
+ return 0;
+}
+
+int stk_camera_read_reg(struct stk_camera *dev, u16 index, int *value)
+{
+ struct usb_device *udev = dev->udev;
+ int ret;
+
+ ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+ 0x00,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0x00,
+ index,
+ (u8 *) value,
+ sizeof(u8),
+ 500);
+ if (ret < 0)
+ return ret;
+ else
+ return 0;
+}
+
+static int stk_start_stream(struct stk_camera *dev)
+{
+ int value;
+ int i, ret;
+ int value_116, value_117;
+
+ if (!is_present(dev))
+ return -ENODEV;
+ if (!is_memallocd(dev) || !is_initialised(dev)) {
+ STK_ERROR("FIXME: Buffers are not allocated\n");
+ return -EFAULT;
+ }
+ ret = usb_set_interface(dev->udev, 0, 5);
+
+ if (ret < 0)
+ STK_ERROR("usb_set_interface failed !\n");
+ if (stk_sensor_wakeup(dev))
+ STK_ERROR("error awaking the sensor\n");
+
+ stk_camera_read_reg(dev, 0x0116, &value_116);
+ stk_camera_read_reg(dev, 0x0117, &value_117);
+
+ stk_camera_write_reg(dev, 0x0116, 0x0000);
+ stk_camera_write_reg(dev, 0x0117, 0x0000);
+
+ stk_camera_read_reg(dev, 0x0100, &value);
+ stk_camera_write_reg(dev, 0x0100, value | 0x80);
+
+ stk_camera_write_reg(dev, 0x0116, value_116);
+ stk_camera_write_reg(dev, 0x0117, value_117);
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (dev->isobufs[i].urb) {
+ ret = usb_submit_urb(dev->isobufs[i].urb, GFP_KERNEL);
+ atomic_inc(&dev->urbs_used);
+ if (ret)
+ return ret;
+ }
+ }
+ set_streaming(dev);
+ return 0;
+}
+
+static int stk_stop_stream(struct stk_camera *dev)
+{
+ int value;
+ int i;
+ if (is_present(dev)) {
+ stk_camera_read_reg(dev, 0x0100, &value);
+ stk_camera_write_reg(dev, 0x0100, value & ~0x80);
+ if (dev->isobufs != NULL) {
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (dev->isobufs[i].urb)
+ usb_kill_urb(dev->isobufs[i].urb);
+ }
+ }
+ unset_streaming(dev);
+
+ if (usb_set_interface(dev->udev, 0, 0))
+ STK_ERROR("usb_set_interface failed !\n");
+ if (stk_sensor_sleep(dev))
+ STK_ERROR("error suspending the sensor\n");
+ }
+ return 0;
+}
+
+/*
+ * This seems to be the shortest init sequence we
+ * must do in order to find the sensor
+ * Bit 5 of reg. 0x0000 here is important, when reset to 0 the sensor
+ * is also reset. Maybe powers down it?
+ * Rest of values don't make a difference
+ */
+
+static struct regval stk1125_initvals[] = {
+ /*TODO: What means this sequence? */
+ {0x0000, 0x24},
+ {0x0100, 0x21},
+ {0x0002, 0x68},
+ {0x0003, 0x80},
+ {0x0005, 0x00},
+ {0x0007, 0x03},
+ {0x000d, 0x00},
+ {0x000f, 0x02},
+ {0x0300, 0x12},
+ {0x0350, 0x41},
+ {0x0351, 0x00},
+ {0x0352, 0x00},
+ {0x0353, 0x00},
+ {0x0018, 0x10},
+ {0x0019, 0x00},
+ {0x001b, 0x0e},
+ {0x001c, 0x46},
+ {0x0300, 0x80},
+ {0x001a, 0x04},
+ {0x0110, 0x00},
+ {0x0111, 0x00},
+ {0x0112, 0x00},
+ {0x0113, 0x00},
+
+ {0xffff, 0xff},
+};
+
+
+static int stk_initialise(struct stk_camera *dev)
+{
+ struct regval *rv;
+ int ret;
+ if (!is_present(dev))
+ return -ENODEV;
+ if (is_initialised(dev))
+ return 0;
+ rv = stk1125_initvals;
+ while (rv->reg != 0xffff) {
+ ret = stk_camera_write_reg(dev, rv->reg, rv->val);
+ if (ret)
+ return ret;
+ rv++;
+ }
+ if (stk_sensor_init(dev) == 0) {
+ set_initialised(dev);
+ return 0;
+ } else
+ return -1;
+}
+
+/* sysfs functions */
+/*FIXME cleanup this */
+
+static ssize_t show_brightness(struct device *class,
+ struct device_attribute *attr, char *buf)
+{
+ struct video_device *vdev = to_video_device(class);
+ struct stk_camera *dev = vdev_to_camera(vdev);
+
+ return sprintf(buf, "%X\n", dev->vsettings.brightness);
+}
+
+static ssize_t store_brightness(struct device *class,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ char *endp;
+ unsigned long value;
+ int ret;
+
+ struct video_device *vdev = to_video_device(class);
+ struct stk_camera *dev = vdev_to_camera(vdev);
+
+ value = simple_strtoul(buf, &endp, 16);
+
+ dev->vsettings.brightness = (int) value;
+
+ ret = stk_sensor_set_brightness(dev, value >> 8);
+ if (ret)
+ return ret;
+ else
+ return count;
+}
+
+static ssize_t show_hflip(struct device *class,
+ struct device_attribute *attr, char *buf)
+{
+ struct video_device *vdev = to_video_device(class);
+ struct stk_camera *dev = vdev_to_camera(vdev);
+
+ return sprintf(buf, "%d\n", dev->vsettings.hflip);
+}
+
+static ssize_t store_hflip(struct device *class,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct video_device *vdev = to_video_device(class);
+ struct stk_camera *dev = vdev_to_camera(vdev);
+
+ if (strncmp(buf, "1", 1) == 0)
+ dev->vsettings.hflip = 1;
+ else if (strncmp(buf, "0", 1) == 0)
+ dev->vsettings.hflip = 0;
+ else
+ return -EINVAL;
+
+ return strlen(buf);
+}
+
+static ssize_t show_vflip(struct device *class,
+ struct device_attribute *attr, char *buf)
+{
+ struct video_device *vdev = to_video_device(class);
+ struct stk_camera *dev = vdev_to_camera(vdev);
+
+ return sprintf(buf, "%d\n", dev->vsettings.vflip);
+}
+
+static ssize_t store_vflip(struct device *class,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct video_device *vdev = to_video_device(class);
+ struct stk_camera *dev = vdev_to_camera(vdev);
+
+ if (strncmp(buf, "1", 1) == 0)
+ dev->vsettings.vflip = 1;
+ else if (strncmp(buf, "0", 1) == 0)
+ dev->vsettings.vflip = 0;
+ else
+ return -EINVAL;
+
+ return strlen(buf);
+}
+
+static DEVICE_ATTR(brightness, S_IRUGO | S_IWUGO,
+ show_brightness, store_brightness);
+static DEVICE_ATTR(hflip, S_IRUGO | S_IWUGO, show_hflip, store_hflip);
+static DEVICE_ATTR(vflip, S_IRUGO | S_IWUGO, show_vflip, store_vflip);
+
+static int stk_create_sysfs_files(struct video_device *vdev)
+{
+ int ret;
+
+ ret = video_device_create_file(vdev, &dev_attr_brightness);
+ ret += video_device_create_file(vdev, &dev_attr_hflip);
+ ret += video_device_create_file(vdev, &dev_attr_vflip);
+ return ret;
+}
+
+static void stk_remove_sysfs_files(struct video_device *vdev)
+{
+ video_device_remove_file(vdev, &dev_attr_brightness);
+ video_device_remove_file(vdev, &dev_attr_hflip);
+ video_device_remove_file(vdev, &dev_attr_vflip);
+}
+
+
+/* *********************************************** */
+/*
+ * This function is called as an URB transfert is complete (Isochronous pipe).
+ * So, the traitement is done in interrupt time, so it has be fast, not crash,
+ * and not stall. Neat.
+ */
+static void stk_isoc_handler(struct urb *urb)
+{
+ int i;
+ int ret;
+ int framelen;
+ unsigned long flags;
+
+ unsigned char *fill = NULL;
+ unsigned char *iso_buf = NULL;
+
+ struct stk_camera *dev;
+ struct stk_sio_buffer *fb;
+
+ dev = (struct stk_camera *) urb->context;
+
+ if (dev == NULL) {
+ STK_ERROR("isoc_handler called with NULL device !\n");
+ return;
+ }
+
+ if (urb->status == -ENOENT || urb->status == -ECONNRESET
+ || urb->status == -ESHUTDOWN) {
+ atomic_dec(&dev->urbs_used);
+ return;
+ }
+
+ spin_lock_irqsave(&dev->spinlock, flags);
+
+ if (urb->status != -EINPROGRESS && urb->status != 0) {
+ STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
+ goto resubmit;
+ }
+
+ if (list_empty(&dev->sio_avail)) {
+ /*FIXME Stop streaming after a while */
+ (void) (printk_ratelimit() &&
+ STK_ERROR("isoc_handler without available buffer!\n"));
+ goto resubmit;
+ }
+ fb = list_first_entry(&dev->sio_avail,
+ struct stk_sio_buffer, list);
+ fill = fb->buffer + fb->v4lbuf.bytesused;
+
+ for (i = 0; i < urb->number_of_packets; i++) {
+ if (urb->iso_frame_desc[i].status != 0) {
+ if (urb->iso_frame_desc[i].status != -EXDEV)
+ STK_ERROR("Frame %d has error %d\n", i,
+ urb->iso_frame_desc[i].status);
+ continue;
+ }
+ framelen = urb->iso_frame_desc[i].actual_length;
+ iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+
+ if (framelen <= 4)
+ continue; /* no data */
+
+ /*
+ * we found something informational from there
+ * the isoc frames have to type of headers
+ * type1: 00 xx 00 00 or 20 xx 00 00
+ * type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
+ * xx is a sequencer which has never been seen over 0x3f
+ * imho data written down looks like bayer, i see similarities
+ * after every 640 bytes
+ */
+ if (*iso_buf & 0x80) {
+ framelen -= 8;
+ iso_buf += 8;
+ /* This marks a new frame */
+ if (fb->v4lbuf.bytesused != 0
+ && fb->v4lbuf.bytesused != dev->frame_size) {
+ (void) (printk_ratelimit() &&
+ STK_ERROR("frame %d, "
+ "bytesused=%d, skipping\n",
+ i, fb->v4lbuf.bytesused));
+ fb->v4lbuf.bytesused = 0;
+ fill = fb->buffer;
+ } else if (fb->v4lbuf.bytesused == dev->frame_size) {
+ list_move_tail(dev->sio_avail.next,
+ &dev->sio_full);
+ wake_up(&dev->wait_frame);
+ if (list_empty(&dev->sio_avail)) {
+ (void) (printk_ratelimit() &&
+ STK_ERROR("No buffer available\n"));
+ goto resubmit;
+ }
+ fb = list_first_entry(&dev->sio_avail,
+ struct stk_sio_buffer, list);
+ fb->v4lbuf.bytesused = 0;
+ fill = fb->buffer;
+ }
+ } else {
+ framelen -= 4;
+ iso_buf += 4;
+ }
+
+ /* Our buffer is full !!! */
+ if (framelen + fb->v4lbuf.bytesused > dev->frame_size) {
+ (void) (printk_ratelimit() &&
+ STK_ERROR("Frame buffer overflow, lost sync\n"));
+ /*FIXME Do something here? */
+ continue;
+ }
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ memcpy(fill, iso_buf, framelen);
+ spin_lock_irqsave(&dev->spinlock, flags);
+ fill += framelen;
+
+ /* New size of our buffer */
+ fb->v4lbuf.bytesused += framelen;
+ }
+
+resubmit:
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ urb->dev = dev->udev;
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret != 0) {
+ STK_ERROR("Error (%d) re-submitting urb in stk_isoc_handler.\n",
+ ret);
+ }
+}
+
+/* -------------------------------------------- */
+
+static int stk_prepare_iso(struct stk_camera *dev)
+{
+ void *kbuf;
+ int i, j;
+ struct urb *urb;
+ struct usb_device *udev;
+
+ if (dev == NULL)
+ return -ENXIO;
+ udev = dev->udev;
+
+ if (dev->isobufs)
+ STK_ERROR("isobufs already allocated. Bad\n");
+ else
+ dev->isobufs = kzalloc(MAX_ISO_BUFS * sizeof(*dev->isobufs),
+ GFP_KERNEL);
+ if (dev->isobufs == NULL) {
+ STK_ERROR("Unable to allocate iso buffers\n");
+ return -ENOMEM;
+ }
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (dev->isobufs[i].data == NULL) {
+ kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
+ if (kbuf == NULL) {
+ STK_ERROR("Failed to allocate iso buffer %d\n",
+ i);
+ goto isobufs_out;
+ }
+ dev->isobufs[i].data = kbuf;
+ } else
+ STK_ERROR("isobuf data already allocated\n");
+ if (dev->isobufs[i].urb == NULL) {
+ urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
+ if (urb == NULL) {
+ STK_ERROR("Failed to allocate URB %d\n", i);
+ goto isobufs_out;
+ }
+ dev->isobufs[i].urb = urb;
+ } else {
+ STK_ERROR("Killing URB\n");
+ usb_kill_urb(dev->isobufs[i].urb);
+ urb = dev->isobufs[i].urb;
+ }
+ urb->interval = 1;
+ urb->dev = udev;
+ urb->pipe = usb_rcvisocpipe(udev, dev->isoc_ep);
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->transfer_buffer = dev->isobufs[i].data;
+ urb->transfer_buffer_length = ISO_BUFFER_SIZE;
+ urb->complete = stk_isoc_handler;
+ urb->context = dev;
+ urb->start_frame = 0;
+ urb->number_of_packets = ISO_FRAMES_PER_DESC;
+
+ for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
+ urb->iso_frame_desc[j].offset = j * ISO_MAX_FRAME_SIZE;
+ urb->iso_frame_desc[j].length = ISO_MAX_FRAME_SIZE;
+ }
+ }
+ set_memallocd(dev);
+ return 0;
+
+isobufs_out:
+ for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].data; i++)
+ kfree(dev->isobufs[i].data);
+ for (i = 0; i < MAX_ISO_BUFS && dev->isobufs[i].urb; i++)
+ usb_free_urb(dev->isobufs[i].urb);
+ kfree(dev->isobufs);
+ dev->isobufs = NULL;
+ return -ENOMEM;
+}
+
+static void stk_clean_iso(struct stk_camera *dev)
+{
+ int i;
+
+ if (dev == NULL || dev->isobufs == NULL)
+ return;
+
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ struct urb *urb;
+
+ urb = dev->isobufs[i].urb;
+ if (urb) {
+ if (atomic_read(&dev->urbs_used))
+ usb_kill_urb(urb);
+ usb_free_urb(urb);
+ }
+ kfree(dev->isobufs[i].data);
+ }
+ kfree(dev->isobufs);
+ dev->isobufs = NULL;
+ unset_memallocd(dev);
+}
+
+static int stk_setup_siobuf(struct stk_camera *dev, int index)
+{
+ struct stk_sio_buffer *buf = dev->sio_bufs + index;
+ INIT_LIST_HEAD(&buf->list);
+ buf->v4lbuf.length = PAGE_ALIGN(dev->frame_size);
+ buf->buffer = vmalloc_user(buf->v4lbuf.length);
+ if (buf->buffer == NULL)
+ return -ENOMEM;
+ buf->mapcount = 0;
+ buf->dev = dev;
+ buf->v4lbuf.index = index;
+ buf->v4lbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf->v4lbuf.field = V4L2_FIELD_NONE;
+ buf->v4lbuf.memory = V4L2_MEMORY_MMAP;
+ buf->v4lbuf.m.offset = 2*index*buf->v4lbuf.length;
+ return 0;
+}
+
+static int stk_free_sio_buffers(struct stk_camera *dev)
+{
+ int i;
+ int nbufs;
+ unsigned long flags;
+ if (dev->n_sbufs == 0 || dev->sio_bufs == NULL)
+ return 0;
+ /*
+ * If any buffers are mapped, we cannot free them at all.
+ */
+ for (i = 0; i < dev->n_sbufs; i++) {
+ if (dev->sio_bufs[i].mapcount > 0)
+ return -EBUSY;
+ }
+ /*
+ * OK, let's do it.
+ */
+ spin_lock_irqsave(&dev->spinlock, flags);
+ INIT_LIST_HEAD(&dev->sio_avail);
+ INIT_LIST_HEAD(&dev->sio_full);
+ nbufs = dev->n_sbufs;
+ dev->n_sbufs = 0;
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ for (i = 0; i < nbufs; i++) {
+ if (dev->sio_bufs[i].buffer != NULL)
+ vfree(dev->sio_bufs[i].buffer);
+ }
+ kfree(dev->sio_bufs);
+ dev->sio_bufs = NULL;
+ return 0;
+}
+
+static int stk_prepare_sio_buffers(struct stk_camera *dev, unsigned n_sbufs)
+{
+ int i;
+ if (dev->sio_bufs != NULL)
+ STK_ERROR("sio_bufs already allocated\n");
+ else {
+ dev->sio_bufs = kzalloc(n_sbufs * sizeof(struct stk_sio_buffer),
+ GFP_KERNEL);
+ if (dev->sio_bufs == NULL)
+ return -ENOMEM;
+ for (i = 0; i < n_sbufs; i++) {
+ if (stk_setup_siobuf(dev, i))
+ return (dev->n_sbufs > 1)? 0 : -ENOMEM;
+ dev->n_sbufs = i+1;
+ }
+ }
+ return 0;
+}
+
+static int stk_allocate_buffers(struct stk_camera *dev, unsigned n_sbufs)
+{
+ int err;
+ err = stk_prepare_iso(dev);
+ if (err) {
+ stk_clean_iso(dev);
+ return err;
+ }
+ err = stk_prepare_sio_buffers(dev, n_sbufs);
+ if (err) {
+ stk_free_sio_buffers(dev);
+ return err;
+ }
+ return 0;
+}
+
+static void stk_free_buffers(struct stk_camera *dev)
+{
+ stk_clean_iso(dev);
+ stk_free_sio_buffers(dev);
+}
+/* -------------------------------------------- */
+
+/* v4l file operations */
+
+static int v4l_stk_open(struct inode *inode, struct file *fp)
+{
+ struct stk_camera *dev;
+ struct video_device *vdev;
+
+ vdev = video_devdata(fp);
+ dev = vdev_to_camera(vdev);
+
+ if (dev == NULL || !is_present(dev))
+ return -ENXIO;
+ fp->private_data = vdev;
+ kref_get(&dev->kref);
+
+ return 0;
+}
+
+static int v4l_stk_release(struct inode *inode, struct file *fp)
+{
+ struct stk_camera *dev;
+ struct video_device *vdev;
+
+ vdev = video_devdata(fp);
+ if (vdev == NULL) {
+ STK_ERROR("v4l_release called w/o video devdata\n");
+ return -EFAULT;
+ }
+ dev = vdev_to_camera(vdev);
+ if (dev == NULL) {
+ STK_ERROR("v4l_release called on removed device\n");
+ return -ENODEV;
+ }
+
+ if (dev->owner != fp) {
+ kref_put(&dev->kref, stk_camera_cleanup);
+ return 0;
+ }
+
+ stk_stop_stream(dev);
+
+ stk_free_buffers(dev);
+
+ dev->owner = NULL;
+
+ kref_put(&dev->kref, stk_camera_cleanup);
+
+ return 0;
+}
+
+static ssize_t v4l_stk_read(struct file *fp, char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ int i;
+ int ret;
+ unsigned long flags;
+ struct stk_camera *dev;
+ struct video_device *vdev;
+ struct stk_sio_buffer *sbuf;
+
+ vdev = video_devdata(fp);
+ if (vdev == NULL)
+ return -EFAULT;
+ dev = vdev_to_camera(vdev);
+
+ if (dev == NULL)
+ return -EIO;
+
+ if (!is_present(dev))
+ return -EIO;
+ if (dev->owner && dev->owner != fp)
+ return -EBUSY;
+ dev->owner = fp;
+ if (!is_streaming(dev)) {
+ if (stk_initialise(dev)
+ || stk_allocate_buffers(dev, 3)
+ || stk_start_stream(dev))
+ return -ENOMEM;
+ spin_lock_irqsave(&dev->spinlock, flags);
+ for (i = 0; i < dev->n_sbufs; i++) {
+ list_add_tail(&dev->sio_bufs[i].list, &dev->sio_avail);
+ dev->sio_bufs[i].v4lbuf.flags = V4L2_BUF_FLAG_QUEUED;
+ }
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ }
+ if (*f_pos == 0) {
+ if (fp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
+ return -EWOULDBLOCK;
+ ret = wait_event_interruptible(dev->wait_frame,
+ !list_empty(&dev->sio_full) || !is_present(dev));
+ if (ret)
+ return ret;
+ if (!is_present(dev))
+ return -EIO;
+ }
+ if (count + *f_pos > dev->frame_size)
+ count = dev->frame_size - *f_pos;
+ spin_lock_irqsave(&dev->spinlock, flags);
+ if (list_empty(&dev->sio_full)) {
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ STK_ERROR("BUG: No siobufs ready\n");
+ return 0;
+ }
+ sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+
+ if (copy_to_user(buf, sbuf->buffer + *f_pos, count))
+ return -EFAULT;
+
+ *f_pos += count;
+
+ if (*f_pos >= dev->frame_size) {
+ *f_pos = 0;
+ spin_lock_irqsave(&dev->spinlock, flags);
+ list_move_tail(&sbuf->list, &dev->sio_avail);
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ }
+ return count;
+}
+
+static unsigned int v4l_stk_poll(struct file *fp, poll_table *wait)
+{
+ struct stk_camera *dev;
+ struct video_device *vdev;
+
+ vdev = video_devdata(fp);
+
+ if (vdev == NULL)
+ return -EFAULT;
+
+ dev = vdev_to_camera(vdev);
+ if (dev == NULL)
+ return -ENODEV;
+
+ poll_wait(fp, &dev->wait_frame, wait);
+
+ if (!is_present(dev))
+ return POLLERR;
+
+ if (!list_empty(&dev->sio_full))
+ return (POLLIN | POLLRDNORM);
+
+ return 0;
+}
+
+
+static void stk_v4l_vm_open(struct vm_area_struct *vma)
+{
+ struct stk_sio_buffer *sbuf = vma->vm_private_data;
+ sbuf->mapcount++;
+}
+static void stk_v4l_vm_close(struct vm_area_struct *vma)
+{
+ struct stk_sio_buffer *sbuf = vma->vm_private_data;
+ sbuf->mapcount--;
+ if (sbuf->mapcount == 0)
+ sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_MAPPED;
+}
+static struct vm_operations_struct stk_v4l_vm_ops = {
+ .open = stk_v4l_vm_open,
+ .close = stk_v4l_vm_close
+};
+
+static int v4l_stk_mmap(struct file *fp, struct vm_area_struct *vma)
+{
+ unsigned int i;
+ int ret;
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ struct stk_camera *dev;
+ struct video_device *vdev;
+ struct stk_sio_buffer *sbuf = NULL;
+
+ if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
+ return -EINVAL;
+
+ vdev = video_devdata(fp);
+ dev = vdev_to_camera(vdev);
+
+ for (i = 0; i < dev->n_sbufs; i++) {
+ if (dev->sio_bufs[i].v4lbuf.m.offset == offset) {
+ sbuf = dev->sio_bufs + i;
+ break;
+ }
+ }
+ if (sbuf == NULL)
+ return -EINVAL;
+ ret = remap_vmalloc_range(vma, sbuf->buffer, 0);
+ if (ret)
+ return ret;
+ vma->vm_flags |= VM_DONTEXPAND;
+ vma->vm_private_data = sbuf;
+ vma->vm_ops = &stk_v4l_vm_ops;
+ sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_MAPPED;
+ stk_v4l_vm_open(vma);
+ return 0;
+}
+
+/* v4l ioctl handlers */
+
+static int stk_vidioc_querycap(struct file *filp,
+ void *priv, struct v4l2_capability *cap)
+{
+ strcpy(cap->driver, "stk");
+ strcpy(cap->card, "stk");
+ cap->version = DRIVER_VERSION_NUM;
+
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
+ | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
+ return 0;
+}
+
+static int stk_vidioc_enum_input(struct file *filp,
+ void *priv, struct v4l2_input *input)
+{
+ if (input->index != 0)
+ return -EINVAL;
+
+ strcpy(input->name, "Syntek USB Camera");
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+ return 0;
+}
+
+
+static int stk_vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int stk_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
+{
+ if (i != 0)
+ return -EINVAL;
+ else
+ return 0;
+}
+
+/* from vivi.c */
+static int stk_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a)
+{
+ return 0;
+}
+
+/* List of all V4Lv2 controls supported by the driver */
+static struct v4l2_queryctrl stk_controls[] = {
+ {
+ .id = V4L2_CID_BRIGHTNESS,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Brightness",
+ .minimum = 0,
+ .maximum = 0xffff,
+ .step = 0x0100,
+ .default_value = 0x6000,
+ },
+ /*TODO: get more controls to work */
+};
+
+static int stk_vidioc_queryctrl(struct file *filp,
+ void *priv, struct v4l2_queryctrl *c)
+{
+ int i;
+ int nbr;
+ nbr = ARRAY_SIZE(stk_controls);
+
+ for (i = 0; i < nbr; i++) {
+ if (stk_controls[i].id == c->id) {
+ memcpy(c, &stk_controls[i],
+ sizeof(struct v4l2_queryctrl));
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int stk_vidioc_g_ctrl(struct file *filp,
+ void *priv, struct v4l2_control *c)
+{
+ struct stk_camera *dev = priv;
+ switch (c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ c->value = dev->vsettings.brightness;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int stk_vidioc_s_ctrl(struct file *filp,
+ void *priv, struct v4l2_control *c)
+{
+ struct stk_camera *dev = priv;
+ switch (c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ dev->vsettings.brightness = c->value;
+ return stk_sensor_set_brightness(dev, c->value >> 8);
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+
+static int stk_vidioc_enum_fmt_cap(struct file *filp,
+ void *priv, struct v4l2_fmtdesc *fmtd)
+{
+ fmtd->flags = 0;
+
+ switch (fmtd->index) {
+ case 0:
+ fmtd->pixelformat = V4L2_PIX_FMT_RGB565;
+ strcpy(fmtd->description, "r5g6b5");
+ break;
+ case 1:
+ fmtd->pixelformat = V4L2_PIX_FMT_RGB565X;
+ strcpy(fmtd->description, "r5g6b5BE");
+ break;
+ case 2:
+ fmtd->pixelformat = V4L2_PIX_FMT_UYVY;
+ strcpy(fmtd->description, "yuv4:2:2");
+ break;
+ case 3:
+ fmtd->pixelformat = V4L2_PIX_FMT_SBGGR8;
+ strcpy(fmtd->description, "Raw bayer");
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static struct stk_size {
+ unsigned w;
+ unsigned h;
+ enum stk_mode m;
+} stk_sizes[] = {
+ { .w = 1280, .h = 1024, .m = MODE_SXGA, },
+ { .w = 640, .h = 480, .m = MODE_VGA, },
+ { .w = 352, .h = 288, .m = MODE_CIF, },
+ { .w = 320, .h = 240, .m = MODE_QVGA, },
+ { .w = 176, .h = 144, .m = MODE_QCIF, },
+};
+
+static int stk_vidioc_g_fmt_cap(struct file *filp,
+ void *priv, struct v4l2_format *f)
+{
+ struct v4l2_pix_format *pix_format = &f->fmt.pix;
+ struct stk_camera *dev = priv;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(stk_sizes)
+ && stk_sizes[i].m != dev->vsettings.mode;
+ i++);
+ if (i == ARRAY_SIZE(stk_sizes)) {
+ STK_ERROR("ERROR: mode invalid\n");
+ return -EINVAL;
+ }
+ pix_format->width = stk_sizes[i].w;
+ pix_format->height = stk_sizes[i].h;
+ pix_format->field = V4L2_FIELD_NONE;
+ pix_format->colorspace = V4L2_COLORSPACE_SRGB;
+ pix_format->priv = 0;
+ pix_format->pixelformat = dev->vsettings.palette;
+ if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
+ pix_format->bytesperline = pix_format->width;
+ else
+ pix_format->bytesperline = 2 * pix_format->width;
+ pix_format->sizeimage = pix_format->bytesperline
+ * pix_format->height;
+ return 0;
+}
+
+static int stk_vidioc_try_fmt_cap(struct file *filp,
+ void *priv, struct v4l2_format *fmtd)
+{
+ int i;
+ switch (fmtd->fmt.pix.pixelformat) {
+ case V4L2_PIX_FMT_RGB565:
+ case V4L2_PIX_FMT_RGB565X:
+ case V4L2_PIX_FMT_UYVY:
+ case V4L2_PIX_FMT_SBGGR8:
+ break;
+ default:
+ return -EINVAL;
+ }
+ for (i = 1; i < ARRAY_SIZE(stk_sizes); i++) {
+ if (fmtd->fmt.pix.width > stk_sizes[i].w)
+ break;
+ }
+ if (i == ARRAY_SIZE(stk_sizes)
+ || (abs(fmtd->fmt.pix.width - stk_sizes[i-1].w)
+ < abs(fmtd->fmt.pix.width - stk_sizes[i].w))) {
+ fmtd->fmt.pix.height = stk_sizes[i-1].h;
+ fmtd->fmt.pix.width = stk_sizes[i-1].w;
+ fmtd->fmt.pix.priv = i - 1;
+ } else {
+ fmtd->fmt.pix.height = stk_sizes[i].h;
+ fmtd->fmt.pix.width = stk_sizes[i].w;
+ fmtd->fmt.pix.priv = i;
+ }
+
+ fmtd->fmt.pix.field = V4L2_FIELD_NONE;
+ fmtd->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+ if (fmtd->fmt.pix.pixelformat == V4L2_PIX_FMT_SBGGR8)
+ fmtd->fmt.pix.bytesperline = fmtd->fmt.pix.width;
+ else
+ fmtd->fmt.pix.bytesperline = 2 * fmtd->fmt.pix.width;
+ fmtd->fmt.pix.sizeimage = fmtd->fmt.pix.bytesperline
+ * fmtd->fmt.pix.height;
+ return 0;
+}
+
+static int stk_vidioc_s_fmt_cap(struct file *filp,
+ void *priv, struct v4l2_format *fmtd)
+{
+ int ret;
+ struct stk_camera *dev = priv;
+
+ if (dev == NULL)
+ return -ENODEV;
+ if (!is_present(dev))
+ return -ENODEV;
+ if (is_streaming(dev))
+ return -EBUSY;
+ if (dev->owner && dev->owner != filp)
+ return -EBUSY;
+ dev->owner = filp;
+ ret = stk_vidioc_try_fmt_cap(filp, priv, fmtd);
+ if (ret)
+ return ret;
+
+ dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
+ stk_free_buffers(dev);
+ dev->frame_size = fmtd->fmt.pix.sizeimage;
+ dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
+
+ stk_initialise(dev);
+ /* This registers controls some timings, not sure of what. */
+ stk_camera_write_reg(dev, 0x001b, 0x0e);
+ if (dev->vsettings.mode == MODE_SXGA)
+ stk_camera_write_reg(dev, 0x001c, 0x0e);
+ else
+ stk_camera_write_reg(dev, 0x001c, 0x46);
+ /*
+ * Registers 0x0115 0x0114 are the size of each line (bytes),
+ * regs 0x0117 0x0116 are the heigth of the image.
+ */
+ stk_camera_write_reg(dev, 0x0115,
+ (fmtd->fmt.pix.bytesperline >> 8) & 0xff);
+ stk_camera_write_reg(dev, 0x0114,
+ fmtd->fmt.pix.bytesperline & 0xff);
+ stk_camera_write_reg(dev, 0x0117,
+ (fmtd->fmt.pix.height >> 8) & 0xff);
+ stk_camera_write_reg(dev, 0x0116,
+ fmtd->fmt.pix.height & 0xff);
+ return stk_sensor_configure(dev);
+}
+
+static int stk_vidioc_reqbufs(struct file *filp,
+ void *priv, struct v4l2_requestbuffers *rb)
+{
+ struct stk_camera *dev = priv;
+
+ if (dev == NULL)
+ return -ENODEV;
+ if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (rb->memory != V4L2_MEMORY_MMAP)
+ return -EINVAL;
+ if (is_streaming(dev)
+ || (dev->owner && dev->owner != filp))
+ return -EBUSY;
+ dev->owner = filp;
+
+ /*FIXME If they ask for zero, we must stop streaming and free */
+ if (rb->count < 3)
+ rb->count = 3;
+ /* Arbitrary limit */
+ else if (rb->count > 5)
+ rb->count = 5;
+
+ stk_allocate_buffers(dev, rb->count);
+ rb->count = dev->n_sbufs;
+ return 0;
+}
+
+static int stk_vidioc_querybuf(struct file *filp,
+ void *priv, struct v4l2_buffer *buf)
+{
+ int index;
+ struct stk_camera *dev = priv;
+ struct stk_sio_buffer *sbuf;
+
+ if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ index = buf->index;
+
+ if (index < 0 || index >= dev->n_sbufs)
+ return -EINVAL;
+ sbuf = dev->sio_bufs + buf->index;
+ *buf = sbuf->v4lbuf;
+ return 0;
+}
+
+static int stk_vidioc_qbuf(struct file *filp,
+ void *priv, struct v4l2_buffer *buf)
+{
+ struct stk_camera *dev = priv;
+ struct stk_sio_buffer *sbuf;
+ unsigned long flags;
+ if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (buf->memory != V4L2_MEMORY_MMAP)
+ return -EINVAL;
+
+ if (buf->index < 0 || buf->index >= dev->n_sbufs)
+ return -EINVAL;
+ sbuf = dev->sio_bufs + buf->index;
+ if (sbuf->v4lbuf.flags & V4L2_BUF_FLAG_QUEUED)
+ return 0;
+ sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_QUEUED;
+ sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_DONE;
+ spin_lock_irqsave(&dev->spinlock, flags);
+ list_add_tail(&sbuf->list, &dev->sio_avail);
+ *buf = sbuf->v4lbuf;
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ return 0;
+}
+
+static int stk_vidioc_dqbuf(struct file *filp,
+ void *priv, struct v4l2_buffer *buf)
+{
+ struct stk_camera *dev = priv;
+ struct stk_sio_buffer *sbuf;
+ unsigned long flags;
+ int ret;
+
+ if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+ || !is_streaming(dev))
+ return -EINVAL;
+
+ if (filp->f_flags & O_NONBLOCK && list_empty(&dev->sio_full))
+ return -EWOULDBLOCK;
+ ret = wait_event_interruptible(dev->wait_frame,
+ !list_empty(&dev->sio_full) || !is_present(dev));
+ if (ret)
+ return ret;
+ if (!is_present(dev))
+ return -EIO;
+
+ spin_lock_irqsave(&dev->spinlock, flags);
+ sbuf = list_first_entry(&dev->sio_full, struct stk_sio_buffer, list);
+ list_del_init(&sbuf->list);
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ sbuf->v4lbuf.flags &= ~V4L2_BUF_FLAG_QUEUED;
+ sbuf->v4lbuf.flags |= V4L2_BUF_FLAG_DONE;
+ sbuf->v4lbuf.sequence = ++dev->sequence;
+ do_gettimeofday(&sbuf->v4lbuf.timestamp);
+
+ *buf = sbuf->v4lbuf;
+ return 0;
+}
+
+static int stk_vidioc_streamon(struct file *filp,
+ void *priv, enum v4l2_buf_type type)
+{
+ struct stk_camera *dev = priv;
+ if (is_streaming(dev))
+ return 0;
+ if (dev->sio_bufs == NULL)
+ return -EINVAL;
+ dev->sequence = 0;
+ return stk_start_stream(dev);
+}
+
+static int stk_vidioc_streamoff(struct file *filp,
+ void *priv, enum v4l2_buf_type type)
+{
+ struct stk_camera *dev = priv;
+ unsigned long flags;
+ int i;
+ stk_stop_stream(dev);
+ spin_lock_irqsave(&dev->spinlock, flags);
+ INIT_LIST_HEAD(&dev->sio_avail);
+ INIT_LIST_HEAD(&dev->sio_full);
+ for (i = 0; i < dev->n_sbufs; i++) {
+ INIT_LIST_HEAD(&dev->sio_bufs[i].list);
+ dev->sio_bufs[i].v4lbuf.flags = 0;
+ }
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+ return 0;
+}
+
+
+static int stk_vidioc_g_parm(struct file *filp,
+ void *priv, struct v4l2_streamparm *sp)
+{
+ if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ sp->parm.capture.capability = 0;
+ sp->parm.capture.capturemode = 0;
+ /*FIXME This is not correct */
+ sp->parm.capture.timeperframe.numerator = 1;
+ sp->parm.capture.timeperframe.denominator = 30;
+ sp->parm.capture.readbuffers = 2;
+ sp->parm.capture.extendedmode = 0;
+ return 0;
+}
+
+static struct file_operations v4l_stk_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l_stk_open,
+ .release = v4l_stk_release,
+ .read = v4l_stk_read,
+ .poll = v4l_stk_poll,
+ .mmap = v4l_stk_mmap,
+ .ioctl = video_ioctl2,
+ .llseek = no_llseek
+};
+
+static void stk_v4l_dev_release(struct video_device *vd)
+{
+}
+
+static struct video_device stk_v4l_data = {
+ .name = "stkwebcam",
+ .type = VFL_TYPE_GRABBER,
+ .type2 = VID_TYPE_CAPTURE,
+ .minor = -1,
+ .tvnorms = V4L2_STD_UNKNOWN,
+ .current_norm = V4L2_STD_UNKNOWN,
+ .fops = &v4l_stk_fops,
+ .release = stk_v4l_dev_release,
+
+ .vidioc_querycap = stk_vidioc_querycap,
+ .vidioc_enum_fmt_cap = stk_vidioc_enum_fmt_cap,
+ .vidioc_try_fmt_cap = stk_vidioc_try_fmt_cap,
+ .vidioc_s_fmt_cap = stk_vidioc_s_fmt_cap,
+ .vidioc_g_fmt_cap = stk_vidioc_g_fmt_cap,
+ .vidioc_enum_input = stk_vidioc_enum_input,
+ .vidioc_s_input = stk_vidioc_s_input,
+ .vidioc_g_input = stk_vidioc_g_input,
+ .vidioc_s_std = stk_vidioc_s_std,
+ .vidioc_reqbufs = stk_vidioc_reqbufs,
+ .vidioc_querybuf = stk_vidioc_querybuf,
+ .vidioc_qbuf = stk_vidioc_qbuf,
+ .vidioc_dqbuf = stk_vidioc_dqbuf,
+ .vidioc_streamon = stk_vidioc_streamon,
+ .vidioc_streamoff = stk_vidioc_streamoff,
+ .vidioc_queryctrl = stk_vidioc_queryctrl,
+ .vidioc_g_ctrl = stk_vidioc_g_ctrl,
+ .vidioc_s_ctrl = stk_vidioc_s_ctrl,
+ .vidioc_g_parm = stk_vidioc_g_parm,
+};
+
+
+static int stk_register_video_device(struct stk_camera *dev)
+{
+ int err;
+
+ dev->vdev = stk_v4l_data;
+ dev->vdev.debug = debug;
+ dev->vdev.dev = &dev->interface->dev;
+ dev->vdev.priv = dev;
+ err = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1);
+ if (err)
+ STK_ERROR("v4l registration failed\n");
+ else
+ STK_INFO("Syntek USB2.0 Camera is now controlling video device"
+ " /dev/video%d\n", dev->vdev.minor);
+ return err;
+}
+
+
+/* USB Stuff */
+
+static int stk_camera_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ int i;
+ int err;
+
+ struct stk_camera *dev = NULL;
+ struct usb_device *udev = interface_to_usbdev(interface);
+ struct usb_host_interface *iface_desc;
+ struct usb_endpoint_descriptor *endpoint;
+
+ dev = kzalloc(sizeof(struct stk_camera), GFP_KERNEL);
+ if (dev == NULL) {
+ STK_ERROR("Out of memory !\n");
+ return -ENOMEM;
+ }
+
+ kref_init(&dev->kref);
+ spin_lock_init(&dev->spinlock);
+ init_waitqueue_head(&dev->wait_frame);
+
+ dev->udev = udev;
+ dev->interface = interface;
+ usb_get_intf(interface);
+
+ dev->vsettings.vflip = vflip;
+ dev->vsettings.hflip = hflip;
+ dev->n_sbufs = 0;
+ set_present(dev);
+
+ /* Set up the endpoint information
+ * use only the first isoc-in endpoint
+ * for the current alternate setting */
+ iface_desc = interface->cur_altsetting;
+
+ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+ endpoint = &iface_desc->endpoint[i].desc;
+
+ if (!dev->isoc_ep
+ && ((endpoint->bEndpointAddress
+ & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
+ && ((endpoint->bmAttributes
+ & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
+ /* we found an isoc in endpoint */
+ dev->isoc_ep = (endpoint->bEndpointAddress & 0xF);
+ break;
+ }
+ }
+ if (!dev->isoc_ep) {
+ STK_ERROR("Could not find isoc-in endpoint");
+ kref_put(&dev->kref, stk_camera_cleanup);
+ return -ENODEV;
+ }
+ dev->vsettings.brightness = 0x7fff;
+ dev->vsettings.palette = V4L2_PIX_FMT_RGB565;
+ dev->vsettings.mode = MODE_VGA;
+ dev->frame_size = 640*480*2;
+
+ INIT_LIST_HEAD(&dev->sio_avail);
+ INIT_LIST_HEAD(&dev->sio_full);
+
+ usb_set_intfdata(interface, dev);
+
+ err = stk_register_video_device(dev);
+ if (err) {
+ kref_put(&dev->kref, stk_camera_cleanup);
+ return err;
+ }
+
+ stk_create_sysfs_files(&dev->vdev);
+
+ return 0;
+}
+
+static void stk_camera_disconnect(struct usb_interface *interface)
+{
+ struct stk_camera *dev = usb_get_intfdata(interface);
+
+ usb_set_intfdata(interface, NULL);
+ unset_present(dev);
+
+ wake_up_interruptible(&dev->wait_frame);
+ stk_remove_sysfs_files(&dev->vdev);
+
+ kref_put(&dev->kref, stk_camera_cleanup);
+}
+
+static struct usb_driver stk_camera_driver = {
+ .name = "stkwebcam",
+ .probe = stk_camera_probe,
+ .disconnect = stk_camera_disconnect,
+ .id_table = stkwebcam_table,
+};
+
+
+static int __init stk_camera_init(void)
+{
+ int result;
+
+ result = usb_register(&stk_camera_driver);
+ if (result)
+ STK_ERROR("usb_register failed ! Error number %d\n", result);
+
+
+ return result;
+}
+
+static void __exit stk_camera_exit(void)
+{
+ usb_deregister(&stk_camera_driver);
+}
+
+module_init(stk_camera_init);
+module_exit(stk_camera_exit);
+
+

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