diff options
Diffstat (limited to 'drivers/media/video/stk-webcam.c')
| -rw-r--r-- | drivers/media/video/stk-webcam.c | 1465 |
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 0000000..f300eca --- /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); + + |
