--- /dev/null
+/*
+ em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
+
+ Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
+ Markus Rechberger <mrechberger@gmail.com>
+ Mauro Carvalho Chehab <mchehab@brturbo.com.br>
+ Sascha Sommer <saschasommer@freenet.de>
+
+ Some parts based on SN9C10x PC Camera Controllers GPL driver made
+ by Luca Risolia <luca.risolia@studio.unibo.it>
+
+ 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
+ (at your option) 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/bitmap.h>
+#include <linux/usb.h>
+#include <linux/i2c.h>
+#include <linux/version.h>
+#include <linux/video_decoder.h>
+#include <linux/mutex.h>
+
+#include "em28xx.h"
+#include <media/tuner.h>
+#include <media/v4l2-common.h>
+#include <media/msp3400.h>
+
+#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
+ "Markus Rechberger <mrechberger@gmail.com>, " \
+ "Mauro Carvalho Chehab <mchehab@brturbo.com.br>, " \
+ "Sascha Sommer <saschasommer@freenet.de>"
+
+#define DRIVER_NAME "em28xx"
+#define DRIVER_DESC "Empia em28xx based USB video device driver"
+#define EM28XX_VERSION_CODE KERNEL_VERSION(0, 0, 1)
+
+#define em28xx_videodbg(fmt, arg...) do {\
+ if (video_debug) \
+ printk(KERN_INFO "%s %s :"fmt, \
+ dev->name, __FUNCTION__ , ##arg); } while (0)
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+static LIST_HEAD(em28xx_devlist);
+
+static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
+static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
+static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
+module_param_array(card, int, NULL, 0444);
+module_param_array(video_nr, int, NULL, 0444);
+module_param_array(vbi_nr, int, NULL, 0444);
+MODULE_PARM_DESC(card,"card type");
+MODULE_PARM_DESC(video_nr,"video device numbers");
+MODULE_PARM_DESC(vbi_nr,"vbi device numbers");
+
+static int tuner = -1;
+module_param(tuner, int, 0444);
+MODULE_PARM_DESC(tuner, "tuner type");
+
+static unsigned int video_debug = 0;
+module_param(video_debug,int,0644);
+MODULE_PARM_DESC(video_debug,"enable debug messages [video]");
+
+/* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
+static unsigned long em28xx_devused;
+
+/* supported tv norms */
+static struct em28xx_tvnorm tvnorms[] = {
+ {
+ .name = "PAL",
+ .id = V4L2_STD_PAL,
+ .mode = VIDEO_MODE_PAL,
+ }, {
+ .name = "NTSC",
+ .id = V4L2_STD_NTSC,
+ .mode = VIDEO_MODE_NTSC,
+ }, {
+ .name = "SECAM",
+ .id = V4L2_STD_SECAM,
+ .mode = VIDEO_MODE_SECAM,
+ }, {
+ .name = "PAL-M",
+ .id = V4L2_STD_PAL_M,
+ .mode = VIDEO_MODE_PAL,
+ }
+};
+
+#define TVNORMS ARRAY_SIZE(tvnorms)
+
+/* supported controls */
+/* Common to all boards */
+static struct v4l2_queryctrl em28xx_qctrl[] = {
+ {
+ .id = V4L2_CID_AUDIO_VOLUME,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Volume",
+ .minimum = 0x0,
+ .maximum = 0x1f,
+ .step = 0x1,
+ .default_value = 0x1f,
+ .flags = 0,
+ },{
+ .id = V4L2_CID_AUDIO_MUTE,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Mute",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ .flags = 0,
+ }
+};
+
+static struct usb_driver em28xx_usb_driver;
+
+static DEFINE_MUTEX(em28xx_sysfs_lock);
+static DECLARE_RWSEM(em28xx_disconnect);
+
+/********************* v4l2 interface ******************************************/
+
+/*
+ * em28xx_config()
+ * inits registers with sane defaults
+ */
+static int em28xx_config(struct em28xx *dev)
+{
+
+ /* Sets I2C speed to 100 KHz */
+ em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
+
+ /* enable vbi capturing */
+
+/* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
+/* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
+ em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
+
+ em28xx_audio_usb_mute(dev, 1);
+ dev->mute = 1; /* maybe not the right place... */
+ dev->volume = 0x1f;
+ em28xx_audio_analog_set(dev);
+ em28xx_audio_analog_setup(dev);
+ em28xx_outfmt_set_yuv422(dev);
+ em28xx_colorlevels_set_default(dev);
+ em28xx_compression_disable(dev);
+
+ return 0;
+}
+
+/*
+ * em28xx_config_i2c()
+ * configure i2c attached devices
+ */
+static void em28xx_config_i2c(struct em28xx *dev)
+{
+ struct v4l2_frequency f;
+ em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
+ em28xx_i2c_call_clients(dev, VIDIOC_S_INPUT, &dev->ctl_input);
+ em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
+
+ /* configure tuner */
+ f.tuner = 0;
+ f.type = V4L2_TUNER_ANALOG_TV;
+ f.frequency = 9076; /* FIXME:remove magic number */
+ dev->ctl_freq = f.frequency;
+ em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
+
+ /* configure tda9887 */
+
+
+/* em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
+}
+
+/*
+ * em28xx_empty_framequeues()
+ * prepare queues for incoming and outgoing frames
+ */
+static void em28xx_empty_framequeues(struct em28xx *dev)
+{
+ u32 i;
+
+ INIT_LIST_HEAD(&dev->inqueue);
+ INIT_LIST_HEAD(&dev->outqueue);
+
+ for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
+ dev->frame[i].state = F_UNUSED;
+ dev->frame[i].buf.bytesused = 0;
+ }
+}
+
+static void video_mux(struct em28xx *dev, int index)
+{
+ int input, ainput;
+
+ input = INPUT(index)->vmux;
+ dev->ctl_input = index;
+ dev->ctl_ainput = INPUT(index)->amux;
+
+ em28xx_i2c_call_clients(dev, VIDIOC_S_INPUT, &input);
+
+ em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,input,dev->ctl_ainput);
+
+ if (dev->has_msp34xx) {
+ struct v4l2_routing route;
+
+ if (dev->i2s_speed)
+ em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
+ route.input = dev->ctl_ainput;
+ route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
+ /* Note: this is msp3400 specific */
+ em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
+ ainput = EM28XX_AUDIO_SRC_TUNER;
+ em28xx_audio_source(dev, ainput);
+ } else {
+ switch (dev->ctl_ainput) {
+ case 0:
+ ainput = EM28XX_AUDIO_SRC_TUNER;
+ break;
+ default:
+ ainput = EM28XX_AUDIO_SRC_LINE;
+ }
+ em28xx_audio_source(dev, ainput);
+ }
+}
+
+/*
+ * em28xx_v4l2_open()
+ * inits the device and starts isoc transfer
+ */
+static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
+{
+ int minor = iminor(inode);
+ int errCode = 0;
+ struct em28xx *h,*dev = NULL;
+ struct list_head *list;
+
+ list_for_each(list,&em28xx_devlist) {
+ h = list_entry(list, struct em28xx, devlist);
+ if (h->vdev->minor == minor) {
+ dev = h;
+ dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ }
+ if (h->vbi_dev->minor == minor) {
+ dev = h;
+ dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
+ }
+ }
+ if (NULL == dev)
+ return -ENODEV;
+
+ filp->private_data=dev;
+
+ em28xx_videodbg("open minor=%d type=%s users=%d\n",
+ minor,v4l2_type_names[dev->type],dev->users);
+
+ if (!down_read_trylock(&em28xx_disconnect))
+ return -ERESTARTSYS;
+
+ if (dev->users) {
+ em28xx_warn("this driver can be opened only once\n");
+ up_read(&em28xx_disconnect);
+ return -EBUSY;
+ }
+
+ mutex_init(&dev->fileop_lock); /* to 1 == available */
+ spin_lock_init(&dev->queue_lock);
+ init_waitqueue_head(&dev->wait_frame);
+ init_waitqueue_head(&dev->wait_stream);
+
+ mutex_lock(&dev->lock);
+
+ if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ em28xx_set_alternate(dev);
+
+ dev->width = norm_maxw(dev);
+ dev->height = norm_maxh(dev);
+ dev->frame_size = dev->width * dev->height * 2;
+ dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
+ dev->bytesperline = dev->width * 2;
+ dev->hscale = 0;
+ dev->vscale = 0;
+
+ em28xx_capture_start(dev, 1);
+ em28xx_resolution_set(dev);
+
+ /* device needs to be initialized before isoc transfer */
+ video_mux(dev, 0);
+
+ /* start the transfer */
+ errCode = em28xx_init_isoc(dev);
+ if (errCode)
+ goto err;
+
+ }
+
+ dev->users++;
+ filp->private_data = dev;
+ dev->io = IO_NONE;
+ dev->stream = STREAM_OFF;
+ dev->num_frames = 0;
+
+ /* prepare queues */
+ em28xx_empty_framequeues(dev);
+
+ dev->state |= DEV_INITIALIZED;
+
+err:
+ mutex_unlock(&dev->lock);
+ up_read(&em28xx_disconnect);
+ return errCode;
+}
+
+/*
+ * em28xx_realease_resources()
+ * unregisters the v4l2,i2c and usb devices
+ * called when the device gets disconected or at module unload
+*/
+static void em28xx_release_resources(struct em28xx *dev)
+{
+ mutex_lock(&em28xx_sysfs_lock);
+
+ /*FIXME: I2C IR should be disconnected */
+
+ em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
+ dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
+ dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
+ list_del(&dev->devlist);
+ video_unregister_device(dev->vdev);
+ video_unregister_device(dev->vbi_dev);
+ em28xx_i2c_unregister(dev);
+ usb_put_dev(dev->udev);
+ mutex_unlock(&em28xx_sysfs_lock);
+
+
+ /* Mark device as unused */
+ em28xx_devused&=~(1<<dev->devno);
+}
+
+/*
+ * em28xx_v4l2_close()
+ * stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
+ */
+static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
+{
+ int errCode;
+ struct em28xx *dev=filp->private_data;
+
+ em28xx_videodbg("users=%d\n", dev->users);
+
+ mutex_lock(&dev->lock);
+
+ em28xx_uninit_isoc(dev);
+
+ em28xx_release_buffers(dev);
+
+ /* the device is already disconnect, free the remaining resources */
+ if (dev->state & DEV_DISCONNECTED) {
+ em28xx_release_resources(dev);
+ mutex_unlock(&dev->lock);
+ kfree(dev);
+ return 0;
+ }
+
+ /* set alternate 0 */
+ dev->alt = 0;
+ em28xx_videodbg("setting alternate 0\n");
+ errCode = usb_set_interface(dev->udev, 0, 0);
+ if (errCode < 0) {
+ em28xx_errdev ("cannot change alternate number to 0 (error=%i)\n",
+ errCode);
+ }
+
+ dev->users--;
+ wake_up_interruptible_nr(&dev->open, 1);
+ mutex_unlock(&dev->lock);
+ return 0;
+}
+
+/*
+ * em28xx_v4l2_read()
+ * will allocate buffers when called for the first time
+ */
+static ssize_t
+em28xx_v4l2_read(struct file *filp, char __user * buf, size_t count,
+ loff_t * f_pos)
+{
+ struct em28xx_frame_t *f, *i;
+ unsigned long lock_flags;
+ int ret = 0;
+ struct em28xx *dev = filp->private_data;
+
+ if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
+ }
+ if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+ em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
+ em28xx_videodbg("not supported yet! ...\n");
+ if (copy_to_user(buf, "", 1)) {
+ mutex_unlock(&dev->fileop_lock);
+ return -EFAULT;
+ }
+ return (1);
+ }
+ if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
+ em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
+ em28xx_videodbg("not supported yet! ...\n");
+ if (copy_to_user(buf, "", 1)) {
+ mutex_unlock(&dev->fileop_lock);
+ return -EFAULT;
+ }
+ return (1);
+ }
+
+ if (mutex_lock_interruptible(&dev->fileop_lock))
+ return -ERESTARTSYS;
+
+ if (dev->state & DEV_DISCONNECTED) {
+ em28xx_videodbg("device not present\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -ENODEV;
+ }
+
+ if (dev->state & DEV_MISCONFIGURED) {
+ em28xx_videodbg("device misconfigured; close and open it again\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -EIO;
+ }
+
+ if (dev->io == IO_MMAP) {
+ em28xx_videodbg ("IO method is set to mmap; close and open"
+ " the device again to choose the read method\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -EINVAL;
+ }
+
+ if (dev->io == IO_NONE) {
+ if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
+ em28xx_errdev("read failed, not enough memory\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -ENOMEM;
+ }
+ dev->io = IO_READ;
+ dev->stream = STREAM_ON;
+ em28xx_queue_unusedframes(dev);
+ }
+
+ if (!count) {
+ mutex_unlock(&dev->fileop_lock);
+ return 0;
+ }
+
+ if (list_empty(&dev->outqueue)) {
+ if (filp->f_flags & O_NONBLOCK) {
+ mutex_unlock(&dev->fileop_lock);
+ return -EAGAIN;
+ }
+ ret = wait_event_interruptible
+ (dev->wait_frame,
+ (!list_empty(&dev->outqueue)) ||
+ (dev->state & DEV_DISCONNECTED));
+ if (ret) {
+ mutex_unlock(&dev->fileop_lock);
+ return ret;
+ }
+ if (dev->state & DEV_DISCONNECTED) {
+ mutex_unlock(&dev->fileop_lock);
+ return -ENODEV;
+ }
+ }
+
+ f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
+
+ spin_lock_irqsave(&dev->queue_lock, lock_flags);
+ list_for_each_entry(i, &dev->outqueue, frame)
+ i->state = F_UNUSED;
+ INIT_LIST_HEAD(&dev->outqueue);
+ spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
+
+ em28xx_queue_unusedframes(dev);
+
+ if (count > f->buf.length)
+ count = f->buf.length;
+
+ if (copy_to_user(buf, f->bufmem, count)) {
+ mutex_unlock(&dev->fileop_lock);
+ return -EFAULT;
+ }
+ *f_pos += count;
+
+ mutex_unlock(&dev->fileop_lock);
+
+ return count;
+}
+
+/*
+ * em28xx_v4l2_poll()
+ * will allocate buffers when called for the first time
+ */
+static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
+{
+ unsigned int mask = 0;
+ struct em28xx *dev = filp->private_data;
+
+ if (mutex_lock_interruptible(&dev->fileop_lock))
+ return POLLERR;
+
+ if (dev->state & DEV_DISCONNECTED) {
+ em28xx_videodbg("device not present\n");
+ } else if (dev->state & DEV_MISCONFIGURED) {
+ em28xx_videodbg("device is misconfigured; close and open it again\n");
+ } else {
+ if (dev->io == IO_NONE) {
+ if (!em28xx_request_buffers
+ (dev, EM28XX_NUM_READ_FRAMES)) {
+ em28xx_warn
+ ("poll() failed, not enough memory\n");
+ } else {
+ dev->io = IO_READ;
+ dev->stream = STREAM_ON;
+ }
+ }
+
+ if (dev->io == IO_READ) {
+ em28xx_queue_unusedframes(dev);
+ poll_wait(filp, &dev->wait_frame, wait);
+
+ if (!list_empty(&dev->outqueue))
+ mask |= POLLIN | POLLRDNORM;
+
+ mutex_unlock(&dev->fileop_lock);
+
+ return mask;
+ }
+ }
+
+ mutex_unlock(&dev->fileop_lock);
+ return POLLERR;
+}
+
+/*
+ * em28xx_vm_open()
+ */
+static void em28xx_vm_open(struct vm_area_struct *vma)
+{
+ struct em28xx_frame_t *f = vma->vm_private_data;
+ f->vma_use_count++;
+}
+
+/*
+ * em28xx_vm_close()
+ */
+static void em28xx_vm_close(struct vm_area_struct *vma)
+{
+ /* NOTE: buffers are not freed here */
+ struct em28xx_frame_t *f = vma->vm_private_data;
+ f->vma_use_count--;
+}
+
+static struct vm_operations_struct em28xx_vm_ops = {
+ .open = em28xx_vm_open,
+ .close = em28xx_vm_close,
+};
+
+/*
+ * em28xx_v4l2_mmap()
+ */
+static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ unsigned long size = vma->vm_end - vma->vm_start,
+ start = vma->vm_start;
+ void *pos;
+ u32 i;
+
+ struct em28xx *dev = filp->private_data;
+
+ if (mutex_lock_interruptible(&dev->fileop_lock))
+ return -ERESTARTSYS;
+
+ if (dev->state & DEV_DISCONNECTED) {
+ em28xx_videodbg("mmap: device not present\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -ENODEV;
+ }
+
+ if (dev->state & DEV_MISCONFIGURED) {
+ em28xx_videodbg ("mmap: Device is misconfigured; close and "
+ "open it again\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -EIO;
+ }
+
+ if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
+ size != PAGE_ALIGN(dev->frame[0].buf.length)) {
+ mutex_unlock(&dev->fileop_lock);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < dev->num_frames; i++) {
+ if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
+ break;
+ }
+ if (i == dev->num_frames) {
+ em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -EINVAL;
+ }
+
+ /* VM_IO is eventually going to replace PageReserved altogether */
+ vma->vm_flags |= VM_IO;
+ vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
+
+ pos = dev->frame[i].bufmem;
+ while (size > 0) { /* size is page-aligned */
+ if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
+ em28xx_videodbg("mmap: vm_insert_page failed\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -EAGAIN;
+ }
+ start += PAGE_SIZE;
+ pos += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ vma->vm_ops = &em28xx_vm_ops;
+ vma->vm_private_data = &dev->frame[i];
+
+ em28xx_vm_open(vma);
+ mutex_unlock(&dev->fileop_lock);
+ return 0;
+}
+
+/*
+ * em28xx_get_ctrl()
+ * return the current saturation, brightness or contrast, mute state
+ */
+static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
+{
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = dev->mute;
+ return 0;
+ case V4L2_CID_AUDIO_VOLUME:
+ ctrl->value = dev->volume;
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+/*
+ * em28xx_set_ctrl()
+ * mute or set new saturation, brightness or contrast
+ */
+static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
+{
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ if (ctrl->value != dev->mute) {
+ dev->mute = ctrl->value;
+ em28xx_audio_usb_mute(dev, ctrl->value);
+ return em28xx_audio_analog_set(dev);
+ }
+ return 0;
+ case V4L2_CID_AUDIO_VOLUME:
+ dev->volume = ctrl->value;
+ return em28xx_audio_analog_set(dev);
+ default:
+ return -EINVAL;
+ }
+}
+
+/*
+ * em28xx_stream_interrupt()
+ * stops streaming
+ */
+static int em28xx_stream_interrupt(struct em28xx *dev)
+{
+ int ret = 0;
+
+ /* stop reading from the device */
+
+ dev->stream = STREAM_INTERRUPT;
+ ret = wait_event_timeout(dev->wait_stream,
+ (dev->stream == STREAM_OFF) ||
+ (dev->state & DEV_DISCONNECTED),
+ EM28XX_URB_TIMEOUT);
+ if (dev->state & DEV_DISCONNECTED)
+ return -ENODEV;
+ else if (ret) {
+ dev->state |= DEV_MISCONFIGURED;
+ em28xx_videodbg("device is misconfigured; close and "
+ "open /dev/video%d again\n",
+ dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int em28xx_set_norm(struct em28xx *dev, int width, int height)
+{
+ unsigned int hscale, vscale;
+ unsigned int maxh, maxw;
+
+ maxw = norm_maxw(dev);
+ maxh = norm_maxh(dev);
+
+ /* width must even because of the YUYV format */
+ /* height must be even because of interlacing */
+ height &= 0xfffe;
+ width &= 0xfffe;
+
+ if (height < 32)
+ height = 32;
+ if (height > maxh)
+ height = maxh;
+ if (width < 48)
+ width = 48;
+ if (width > maxw)
+ width = maxw;
+
+ if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
+ hscale = 0x3fff;
+ width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
+
+ if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
+ vscale = 0x3fff;
+ height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
+
+ /* set new image size */
+ dev->width = width;
+ dev->height = height;
+ dev->frame_size = dev->width * dev->height * 2;
+ dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
+ dev->bytesperline = dev->width * 2;
+ dev->hscale = hscale;
+ dev->vscale = vscale;
+
+ em28xx_resolution_set(dev);
+
+ return 0;
+}
+
+static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
+{
+ em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
+ (format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
+ "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
+ (format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
+ "V4L2_BUF_TYPE_VBI_CAPTURE" :
+ (format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
+ "V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
+ "not supported");
+
+ switch (format->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ {
+ format->fmt.pix.width = dev->width;
+ format->fmt.pix.height = dev->height;
+ format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ format->fmt.pix.bytesperline = dev->bytesperline;
+ format->fmt.pix.sizeimage = dev->frame_size;
+ format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+ format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
+
+ em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
+ dev->height);
+ break;
+ }
+
+ case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
+ {
+ format->fmt.sliced.service_set=0;
+
+ em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
+
+ if (format->fmt.sliced.service_set==0)
+ return -EINVAL;
+
+ break;
+ }
+
+ default:
+ return -EINVAL;
+ }
+ return (0);
+}
+
+static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
+{
+ u32 i;
+ int ret = 0;
+ int width = format->fmt.pix.width;
+ int height = format->fmt.pix.height;
+ unsigned int hscale, vscale;
+ unsigned int maxh, maxw;
+
+ maxw = norm_maxw(dev);
+ maxh = norm_maxh(dev);
+
+ em28xx_videodbg("%s: type=%s\n",
+ cmd == VIDIOC_TRY_FMT ?
+ "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
+ format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
+ "V4L2_BUF_TYPE_VIDEO_CAPTURE" :
+ format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
+ "V4L2_BUF_TYPE_VBI_CAPTURE " :
+ "not supported");
+
+ if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
+ em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
+
+ if (format->fmt.sliced.service_set==0)
+ return -EINVAL;
+
+ return 0;
+ }
+
+
+ if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ em28xx_videodbg("%s: requested %dx%d\n",
+ cmd == VIDIOC_TRY_FMT ?
+ "VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
+ format->fmt.pix.width, format->fmt.pix.height);
+
+ /* FIXME: Move some code away from here */
+ /* width must even because of the YUYV format */
+ /* height must be even because of interlacing */
+ height &= 0xfffe;
+ width &= 0xfffe;
+
+ if (height < 32)
+ height = 32;
+ if (height > maxh)
+ height = maxh;
+ if (width < 48)
+ width = 48;
+ if (width > maxw)
+ width = maxw;
+
+ if(dev->is_em2800){
+ /* the em2800 can only scale down to 50% */
+ if(height % (maxh / 2))
+ height=maxh;
+ if(width % (maxw / 2))
+ width=maxw;
+ /* according to empiatech support */
+ /* the MaxPacketSize is to small to support */
+ /* framesizes larger than 640x480 @ 30 fps */
+ /* or 640x576 @ 25 fps. As this would cut */
+ /* of a part of the image we prefer */
+ /* 360x576 or 360x480 for now */
+ if(width == maxw && height == maxh)
+ width /= 2;
+ }
+
+ if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
+ hscale = 0x3fff;
+
+ width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
+
+ if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
+ vscale = 0x3fff;
+
+ height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
+
+ format->fmt.pix.width = width;
+ format->fmt.pix.height = height;
+ format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ format->fmt.pix.bytesperline = width * 2;
+ format->fmt.pix.sizeimage = width * 2 * height;
+ format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+ format->fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+ em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
+ cmd == VIDIOC_TRY_FMT ?
+ "VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
+ format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
+
+ if (cmd == VIDIOC_TRY_FMT)
+ return 0;
+
+ for (i = 0; i < dev->num_frames; i++)
+ if (dev->frame[i].vma_use_count) {
+ em28xx_videodbg("VIDIOC_S_FMT failed. "
+ "Unmap the buffers first.\n");
+ return -EINVAL;
+ }
+
+ /* stop io in case it is already in progress */
+ if (dev->stream == STREAM_ON) {
+ em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
+ if ((ret = em28xx_stream_interrupt(dev)))
+ return ret;
+ }
+
+ em28xx_release_buffers(dev);
+ dev->io = IO_NONE;
+
+ /* set new image size */
+ dev->width = width;
+ dev->height = height;
+ dev->frame_size = dev->width * dev->height * 2;
+ dev->field_size = dev->frame_size >> 1;
+ dev->bytesperline = dev->width * 2;
+ dev->hscale = hscale;
+ dev->vscale = vscale;
+ em28xx_uninit_isoc(dev);
+ em28xx_set_alternate(dev);
+ em28xx_capture_start(dev, 1);
+ em28xx_resolution_set(dev);
+ em28xx_init_isoc(dev);
+
+ return 0;
+}
+
+/*
+ * em28xx_v4l2_do_ioctl()
+ * This function is _not_ called directly, but from
+ * em28xx_v4l2_ioctl. Userspace
+ * copying is done already, arg is a kernel pointer.
+ */
+static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
+ struct em28xx *dev, unsigned int cmd, void *arg,
+ v4l2_kioctl driver_ioctl)
+{
+ int ret;
+
+ switch (cmd) {
+ /* ---------- tv norms ---------- */
+ case VIDIOC_ENUMSTD:
+ {
+ struct v4l2_standard *e = arg;
+ unsigned int i;
+
+ i = e->index;
+ if (i >= TVNORMS)
+ return -EINVAL;
+ ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
+ tvnorms[e->index].name);
+ e->index = i;
+ if (ret < 0)
+ return ret;
+ return 0;
+ }
+ case VIDIOC_G_STD:
+ {
+ v4l2_std_id *id = arg;
+
+ *id = dev->tvnorm->id;
+ return 0;
+ }
+ case VIDIOC_S_STD:
+ {
+ v4l2_std_id *id = arg;
+ unsigned int i;
+
+ for (i = 0; i < TVNORMS; i++)
+ if (*id == tvnorms[i].id)
+ break;
+ if (i == TVNORMS)
+ for (i = 0; i < TVNORMS; i++)
+ if (*id & tvnorms[i].id)
+ break;
+ if (i == TVNORMS)
+ return -EINVAL;
+
+ mutex_lock(&dev->lock);
+ dev->tvnorm = &tvnorms[i];
+
+ em28xx_set_norm(dev, dev->width, dev->height);
+
+ em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
+ &dev->tvnorm->id);
+
+ mutex_unlock(&dev->lock);
+
+ return 0;
+ }
+
+ /* ------ input switching ---------- */
+ case VIDIOC_ENUMINPUT:
+ {
+ struct v4l2_input *i = arg;
+ unsigned int n;
+ static const char *iname[] = {
+ [EM28XX_VMUX_COMPOSITE1] = "Composite1",
+ [EM28XX_VMUX_COMPOSITE2] = "Composite2",
+ [EM28XX_VMUX_COMPOSITE3] = "Composite3",
+ [EM28XX_VMUX_COMPOSITE4] = "Composite4",
+ [EM28XX_VMUX_SVIDEO] = "S-Video",
+ [EM28XX_VMUX_TELEVISION] = "Television",
+ [EM28XX_VMUX_CABLE] = "Cable TV",
+ [EM28XX_VMUX_DVB] = "DVB",
+ [EM28XX_VMUX_DEBUG] = "for debug only",
+ };
+
+ n = i->index;
+ if (n >= MAX_EM28XX_INPUT)
+ return -EINVAL;
+ if (0 == INPUT(n)->type)
+ return -EINVAL;
+ memset(i, 0, sizeof(*i));
+ i->index = n;
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+ strcpy(i->name, iname[INPUT(n)->type]);
+ if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
+ (EM28XX_VMUX_CABLE == INPUT(n)->type))
+ i->type = V4L2_INPUT_TYPE_TUNER;
+ for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
+ i->std |= tvnorms[n].id;
+ return 0;
+ }
+ case VIDIOC_G_INPUT:
+ {
+ int *i = arg;
+ *i = dev->ctl_input;
+
+ return 0;
+ }
+ case VIDIOC_S_INPUT:
+ {
+ int *index = arg;
+
+ if (*index >= MAX_EM28XX_INPUT)
+ return -EINVAL;
+ if (0 == INPUT(*index)->type)
+ return -EINVAL;
+
+ mutex_lock(&dev->lock);
+ video_mux(dev, *index);
+ mutex_unlock(&dev->lock);
+
+ return 0;
+ }
+ case VIDIOC_G_AUDIO:
+ {
+ struct v4l2_audio *a = arg;
+ unsigned int index = a->index;
+
+ if (a->index > 1)
+ return -EINVAL;
+ memset(a, 0, sizeof(*a));
+ index = dev->ctl_ainput;
+
+ if (index == 0) {
+ strcpy(a->name, "Television");
+ } else {
+ strcpy(a->name, "Line In");
+ }
+ a->capability = V4L2_AUDCAP_STEREO;
+ a->index = index;
+ return 0;
+ }
+ case VIDIOC_S_AUDIO:
+ {
+ struct v4l2_audio *a = arg;
+
+ if (a->index != dev->ctl_ainput)
+ return -EINVAL;
+
+ return 0;
+ }
+
+ /* --- controls ---------------------------------------------- */
+ case VIDIOC_QUERYCTRL:
+ {
+ struct v4l2_queryctrl *qc = arg;
+ int i, id=qc->id;
+
+ memset(qc,0,sizeof(*qc));
+ qc->id=id;
+
+ if (!dev->has_msp34xx) {
+ for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
+ if (qc->id && qc->id == em28xx_qctrl[i].id) {
+ memcpy(qc, &(em28xx_qctrl[i]),
+ sizeof(*qc));
+ return 0;
+ }
+ }
+ }
+ em28xx_i2c_call_clients(dev,cmd,qc);
+ if (qc->type)
+ return 0;
+ else
+ return -EINVAL;
+ }
+ case VIDIOC_G_CTRL:
+ {
+ struct v4l2_control *ctrl = arg;
+ int retval=-EINVAL;
+
+ if (!dev->has_msp34xx)
+ retval=em28xx_get_ctrl(dev, ctrl);
+ if (retval==-EINVAL) {
+ em28xx_i2c_call_clients(dev,cmd,arg);
+ return 0;
+ } else return retval;
+ }
+ case VIDIOC_S_CTRL:
+ {
+ struct v4l2_control *ctrl = arg;
+ u8 i;
+
+ if (!dev->has_msp34xx){
+ for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
+ if (ctrl->id == em28xx_qctrl[i].id) {
+ if (ctrl->value <
+ em28xx_qctrl[i].minimum
+ || ctrl->value >
+ em28xx_qctrl[i].maximum)
+ return -ERANGE;
+ return em28xx_set_ctrl(dev, ctrl);
+ }
+ }
+ }
+
+ em28xx_i2c_call_clients(dev,cmd,arg);
+ return 0;
+ }
+ /* --- tuner ioctls ------------------------------------------ */
+ case VIDIOC_G_TUNER:
+ {
+ struct v4l2_tuner *t = arg;
+
+ if (0 != t->index)
+ return -EINVAL;
+
+ memset(t, 0, sizeof(*t));
+ strcpy(t->name, "Tuner");
+ mutex_lock(&dev->lock);
+ /* let clients fill in the remainder of this struct */
+ em28xx_i2c_call_clients(dev, cmd, t);
+ mutex_unlock(&dev->lock);
+ em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
+ t->afc);
+ return 0;
+ }
+ case VIDIOC_S_TUNER:
+ {
+ struct v4l2_tuner *t = arg;
+
+ if (0 != t->index)
+ return -EINVAL;
+ mutex_lock(&dev->lock);
+ /* let clients handle this */
+ em28xx_i2c_call_clients(dev, cmd, t);
+ mutex_unlock(&dev->lock);
+ return 0;
+ }
+ case VIDIOC_G_FREQUENCY:
+ {
+ struct v4l2_frequency *f = arg;
+
+ memset(f, 0, sizeof(*f));
+ f->type = V4L2_TUNER_ANALOG_TV;
+ f->frequency = dev->ctl_freq;
+
+ return 0;
+ }
+ case VIDIOC_S_FREQUENCY:
+ {
+ struct v4l2_frequency *f = arg;
+
+ if (0 != f->tuner)
+ return -EINVAL;
+
+ if (V4L2_TUNER_ANALOG_TV != f->type)
+ return -EINVAL;
+
+ mutex_lock(&dev->lock);
+ dev->ctl_freq = f->frequency;
+ em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
+ mutex_unlock(&dev->lock);
+ return 0;
+ }
+ case VIDIOC_CROPCAP:
+ {
+ struct v4l2_cropcap *cc = arg;
+
+ if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ cc->bounds.left = 0;
+ cc->bounds.top = 0;
+ cc->bounds.width = dev->width;
+ cc->bounds.height = dev->height;
+ cc->defrect = cc->bounds;
+ cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
+ cc->pixelaspect.denominator = 59;
+ return 0;
+ }
+ case VIDIOC_STREAMON:
+ {
+ int *type = arg;
+
+ if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+ || dev->io != IO_MMAP)
+ return -EINVAL;
+
+ if (list_empty(&dev->inqueue))
+ return -EINVAL;
+
+ dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
+
+ em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
+
+ return 0;
+ }
+ case VIDIOC_STREAMOFF:
+ {
+ int *type = arg;
+ int ret;
+
+ if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+ || dev->io != IO_MMAP)
+ return -EINVAL;
+
+ if (dev->stream == STREAM_ON) {
+ em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
+ if ((ret = em28xx_stream_interrupt(dev)))
+ return ret;
+ }
+ em28xx_empty_framequeues(dev);
+
+ return 0;
+ }
+ default:
+ return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
+ driver_ioctl);
+ }
+ return 0;
+}
+
+/*
+ * em28xx_v4l2_do_ioctl()
+ * This function is _not_ called directly, but from
+ * em28xx_v4l2_ioctl. Userspace
+ * copying is done already, arg is a kernel pointer.
+ */
+static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, void *arg)
+{
+ struct em28xx *dev = filp->private_data;
+
+ if (!dev)
+ return -ENODEV;
+
+ if (video_debug > 1)
+ v4l_print_ioctl(dev->name,cmd);
+
+ switch (cmd) {
+
+ /* --- capabilities ------------------------------------------ */
+ case VIDIOC_QUERYCAP:
+ {
+ struct v4l2_capability *cap = arg;
+
+ memset(cap, 0, sizeof(*cap));
+ strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
+ strlcpy(cap->card, em28xx_boards[dev->model].name,
+ sizeof(cap->card));
+ strlcpy(cap->bus_info, dev->udev->dev.bus_id,
+ sizeof(cap->bus_info));
+ cap->version = EM28XX_VERSION_CODE;
+ cap->capabilities =
+ V4L2_CAP_SLICED_VBI_CAPTURE |
+ V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_AUDIO |
+ V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
+ if (dev->has_tuner)
+ cap->capabilities |= V4L2_CAP_TUNER;
+ return 0;
+ }
+ /* --- capture ioctls ---------------------------------------- */
+ case VIDIOC_ENUM_FMT:
+ {
+ struct v4l2_fmtdesc *fmtd = arg;
+
+ if (fmtd->index != 0)
+ return -EINVAL;
+ memset(fmtd, 0, sizeof(*fmtd));
+ fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ strcpy(fmtd->description, "Packed YUY2");
+ fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
+ memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
+ return 0;
+ }
+ case VIDIOC_G_FMT:
+ return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
+
+ case VIDIOC_TRY_FMT:
+ case VIDIOC_S_FMT:
+ return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
+
+ case VIDIOC_REQBUFS:
+ {
+ struct v4l2_requestbuffers *rb = arg;
+ u32 i;
+ int ret;
+
+ if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ rb->memory != V4L2_MEMORY_MMAP)
+ return -EINVAL;
+
+ if (dev->io == IO_READ) {
+ em28xx_videodbg ("method is set to read;"
+ " close and open the device again to"
+ " choose the mmap I/O method\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < dev->num_frames; i++)
+ if (dev->frame[i].vma_use_count) {
+ em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
+ return -EINVAL;
+ }
+
+ if (dev->stream == STREAM_ON) {
+ em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
+ if ((ret = em28xx_stream_interrupt(dev)))
+ return ret;
+ }
+
+ em28xx_empty_framequeues(dev);
+
+ em28xx_release_buffers(dev);
+ if (rb->count)
+ rb->count =
+ em28xx_request_buffers(dev, rb->count);
+
+ dev->frame_current = NULL;
+
+ em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
+ rb->count);
+ dev->io = rb->count ? IO_MMAP : IO_NONE;
+ return 0;
+ }
+ case VIDIOC_QUERYBUF:
+ {
+ struct v4l2_buffer *b = arg;
+
+ if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ b->index >= dev->num_frames || dev->io != IO_MMAP)
+ return -EINVAL;
+
+ memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
+
+ if (dev->frame[b->index].vma_use_count) {
+ b->flags |= V4L2_BUF_FLAG_MAPPED;
+ }
+ if (dev->frame[b->index].state == F_DONE)
+ b->flags |= V4L2_BUF_FLAG_DONE;
+ else if (dev->frame[b->index].state != F_UNUSED)
+ b->flags |= V4L2_BUF_FLAG_QUEUED;
+ return 0;
+ }
+ case VIDIOC_QBUF:
+ {
+ struct v4l2_buffer *b = arg;
+ unsigned long lock_flags;
+
+ if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ b->index >= dev->num_frames || dev->io != IO_MMAP) {
+ return -EINVAL;
+ }
+
+ if (dev->frame[b->index].state != F_UNUSED) {
+ return -EAGAIN;
+ }
+ dev->frame[b->index].state = F_QUEUED;
+
+ /* add frame to fifo */
+ spin_lock_irqsave(&dev->queue_lock, lock_flags);
+ list_add_tail(&dev->frame[b->index].frame,
+ &dev->inqueue);
+ spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
+
+ return 0;
+ }
+ case VIDIOC_DQBUF:
+ {
+ struct v4l2_buffer *b = arg;
+ struct em28xx_frame_t *f;
+ unsigned long lock_flags;
+ int ret = 0;
+
+ if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
+ || dev->io != IO_MMAP)
+ return -EINVAL;
+
+ if (list_empty(&dev->outqueue)) {
+ if (dev->stream == STREAM_OFF)
+ return -EINVAL;
+ if (filp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ ret = wait_event_interruptible
+ (dev->wait_frame,
+ (!list_empty(&dev->outqueue)) ||
+ (dev->state & DEV_DISCONNECTED));
+ if (ret)
+ return ret;
+ if (dev->state & DEV_DISCONNECTED)
+ return -ENODEV;
+ }
+
+ spin_lock_irqsave(&dev->queue_lock, lock_flags);
+ f = list_entry(dev->outqueue.next,
+ struct em28xx_frame_t, frame);
+ list_del(dev->outqueue.next);
+ spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
+
+ f->state = F_UNUSED;
+ memcpy(b, &f->buf, sizeof(*b));
+
+ if (f->vma_use_count)
+ b->flags |= V4L2_BUF_FLAG_MAPPED;
+
+ return 0;
+ }
+ default:
+ return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
+ em28xx_video_do_ioctl);
+ }
+ return 0;
+}
+
+/*
+ * em28xx_v4l2_ioctl()
+ * handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
+ */
+static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ int ret = 0;
+ struct em28xx *dev = filp->private_data;
+
+ if (mutex_lock_interruptible(&dev->fileop_lock))
+ return -ERESTARTSYS;
+
+ if (dev->state & DEV_DISCONNECTED) {
+ em28xx_errdev("v4l2 ioctl: device not present\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -ENODEV;
+ }
+
+ if (dev->state & DEV_MISCONFIGURED) {
+ em28xx_errdev
+ ("v4l2 ioctl: device is misconfigured; close and open it again\n");
+ mutex_unlock(&dev->fileop_lock);
+ return -EIO;
+ }
+
+ ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
+
+ mutex_unlock(&dev->fileop_lock);
+
+ return ret;
+}
+
+static struct file_operations em28xx_v4l_fops = {
+ .owner = THIS_MODULE,
+ .open = em28xx_v4l2_open,
+ .release = em28xx_v4l2_close,
+ .ioctl = em28xx_v4l2_ioctl,
+ .read = em28xx_v4l2_read,
+ .poll = em28xx_v4l2_poll,
+ .mmap = em28xx_v4l2_mmap,
+ .llseek = no_llseek,
+ .compat_ioctl = v4l_compat_ioctl32,
+
+};
+
+/******************************** usb interface *****************************************/
+
+/*
+ * em28xx_init_dev()
+ * allocates and inits the device structs, registers i2c bus and v4l device
+ */
+static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
+ int minor, int model)
+{
+ struct em28xx *dev = *devhandle;
+ int retval = -ENOMEM;
+ int errCode, i;
+ unsigned int maxh, maxw;
+
+ dev->udev = udev;
+ dev->model = model;
+ mutex_init(&dev->lock);
+ init_waitqueue_head(&dev->open);
+
+ dev->em28xx_write_regs = em28xx_write_regs;
+ dev->em28xx_read_reg = em28xx_read_reg;
+ dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
+ dev->em28xx_write_regs_req = em28xx_write_regs_req;
+ dev->em28xx_read_reg_req = em28xx_read_reg_req;
+ dev->is_em2800 = em28xx_boards[model].is_em2800;
+ dev->has_tuner = em28xx_boards[model].has_tuner;
+ dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
+ dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
+ dev->decoder = em28xx_boards[model].decoder;
+
+ if (tuner >= 0)
+ dev->tuner_type = tuner;
+ else
+ dev->tuner_type = em28xx_boards[model].tuner_type;
+
+ dev->video_inputs = em28xx_boards[model].vchannels;
+
+ for (i = 0; i < TVNORMS; i++)
+ if (em28xx_boards[model].norm == tvnorms[i].mode)
+ break;
+ if (i == TVNORMS)
+ i = 0;
+
+ dev->tvnorm = &tvnorms[i]; /* set default norm */
+
+ em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
+
+ maxw = norm_maxw(dev);
+ maxh = norm_maxh(dev);
+
+ /* set default image size */
+ dev->width = maxw;
+ dev->height = maxh;
+ dev->interlaced = EM28XX_INTERLACED_DEFAULT;
+ dev->field_size = dev->width * dev->height;
+ dev->frame_size =
+ dev->interlaced ? dev->field_size << 1 : dev->field_size;
+ dev->bytesperline = dev->width * 2;
+ dev->hscale = 0;
+ dev->vscale = 0;
+ dev->ctl_input = 2;
+
+ /* setup video picture settings for saa7113h */
+ memset(&dev->vpic, 0, sizeof(dev->vpic));
+ dev->vpic.colour = 128 << 8;
+ dev->vpic.hue = 128 << 8;
+ dev->vpic.brightness = 128 << 8;
+ dev->vpic.contrast = 192 << 8;
+ dev->vpic.whiteness = 128 << 8; /* This one isn't used */
+ dev->vpic.depth = 16;
+ dev->vpic.palette = VIDEO_PALETTE_YUV422;
+
+ em28xx_pre_card_setup(dev);
+#ifdef CONFIG_MODULES
+ /* request some modules */
+ if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
+ request_module("saa7115");
+ if (dev->decoder == EM28XX_TVP5150)
+ request_module("tvp5150");
+ if (dev->has_tuner)
+ request_module("tuner");
+ if (dev->tda9887_conf)
+ request_module("tda9887");
+#endif
+ errCode = em28xx_config(dev);
+ if (errCode) {
+ em28xx_errdev("error configuring device\n");
+ em28xx_devused&=~(1<<dev->devno);
+ kfree(dev);
+ return -ENOMEM;
+ }
+
+ mutex_lock(&dev->lock);
+ /* register i2c bus */
+ em28xx_i2c_register(dev);
+
+ /* Do board specific init and eeprom reading */
+ em28xx_card_setup(dev);
+
+ /* configure the device */
+ em28xx_config_i2c(dev);
+
+ mutex_unlock(&dev->lock);
+
+ errCode = em28xx_config(dev);
+
+#ifdef CONFIG_MODULES
+ if (dev->has_msp34xx)
+ request_module("msp3400");
+#endif
+ /* allocate and fill v4l2 device struct */
+ dev->vdev = video_device_alloc();
+ if (NULL == dev->vdev) {
+ em28xx_errdev("cannot allocate video_device.\n");
+ em28xx_devused&=~(1<<dev->devno);
+ kfree(dev);
+ return -ENOMEM;
+ }
+
+ dev->vbi_dev = video_device_alloc();
+ if (NULL == dev->vbi_dev) {
+ em28xx_errdev("cannot allocate video_device.\n");
+ kfree(dev->vdev);
+ em28xx_devused&=~(1<<dev->devno);
+ kfree(dev);
+ return -ENOMEM;
+ }
+
+ /* Fills VBI device info */
+ dev->vbi_dev->type = VFL_TYPE_VBI;
+ dev->vbi_dev->hardware = 0;
+ dev->vbi_dev->fops = &em28xx_v4l_fops;
+ dev->vbi_dev->minor = -1;
+ dev->vbi_dev->dev = &dev->udev->dev;
+ dev->vbi_dev->release = video_device_release;
+ snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
+ "em28xx",dev->devno,"vbi");
+
+ /* Fills CAPTURE device info */
+ dev->vdev->type = VID_TYPE_CAPTURE;
+ if (dev->has_tuner)
+ dev->vdev->type |= VID_TYPE_TUNER;
+ dev->vdev->hardware = 0;
+ dev->vdev->fops = &em28xx_v4l_fops;
+ dev->vdev->minor = -1;
+ dev->vdev->dev = &dev->udev->dev;
+ dev->vdev->release = video_device_release;
+ snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
+ "em28xx",dev->devno,"video");
+
+ list_add_tail(&dev->devlist,&em28xx_devlist);
+
+ /* register v4l2 device */
+ mutex_lock(&dev->lock);
+ if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
+ video_nr[dev->devno]))) {
+ em28xx_errdev("unable to register video device (error=%i).\n",
+ retval);
+ mutex_unlock(&dev->lock);
+ list_del(&dev->devlist);
+ video_device_release(dev->vdev);
+ em28xx_devused&=~(1<<dev->devno);
+ kfree(dev);
+ return -ENODEV;
+ }
+
+ if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
+ vbi_nr[dev->devno]) < 0) {
+ printk("unable to register vbi device\n");
+ mutex_unlock(&dev->lock);
+ list_del(&dev->devlist);
+ video_device_release(dev->vbi_dev);
+ video_device_release(dev->vdev);
+ em28xx_devused&=~(1<<dev->devno);
+ kfree(dev);
+ return -ENODEV;
+ } else {
+ printk("registered VBI\n");
+ }
+
+ if (dev->has_msp34xx) {
+ /* Send a reset to other chips via gpio */
+ em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
+ udelay(2500);
+ em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
+ udelay(2500);
+
+ }
+ video_mux(dev, 0);
+
+ mutex_unlock(&dev->lock);
+
+ em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
+ dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
+ dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
+
+ return 0;
+}
+
+/*
+ * em28xx_usb_probe()
+ * checks for supported devices
+ */
+static int em28xx_usb_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ const struct usb_endpoint_descriptor *endpoint;
+ struct usb_device *udev;
+ struct usb_interface *uif;
+ struct em28xx *dev = NULL;
+ int retval = -ENODEV;
+ int model,i,nr,ifnum;
+
+ udev = usb_get_dev(interface_to_usbdev(interface));
+ ifnum = interface->altsetting[0].desc.bInterfaceNumber;
+
+ /* Check to see next free device and mark as used */
+ nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
+ em28xx_devused|=1<<nr;
+
+ /* Don't register audio interfaces */
+ if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
+ em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
+ udev->descriptor.idVendor,udev->descriptor.idProduct,
+ ifnum,
+ interface->altsetting[0].desc.bInterfaceClass);
+
+ em28xx_devused&=~(1<<nr);
+ return -ENODEV;
+ }
+
+ em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
+ udev->descriptor.idVendor,udev->descriptor.idProduct,
+ ifnum,
+ interface->altsetting[0].desc.bInterfaceClass);
+
+ endpoint = &interface->cur_altsetting->endpoint[1].desc;
+
+ /* check if the the device has the iso in endpoint at the correct place */
+ if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
+ USB_ENDPOINT_XFER_ISOC) {
+ em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
+ em28xx_devused&=~(1<<nr);
+ return -ENODEV;
+ }
+ if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
+ em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
+ em28xx_devused&=~(1<<nr);
+ return -ENODEV;
+ }
+
+ model=id->driver_info;
+
+ if (nr >= EM28XX_MAXBOARDS) {
+ printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
+ em28xx_devused&=~(1<<nr);
+ return -ENOMEM;
+ }
+
+ /* allocate memory for our device state and initialize it */
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (dev == NULL) {
+ em28xx_err(DRIVER_NAME ": out of memory!\n");
+ em28xx_devused&=~(1<<nr);
+ return -ENOMEM;
+ }
+
+ snprintf(dev->name, 29, "em28xx #%d", nr);
+ dev->devno=nr;
+
+ /* compute alternate max packet sizes */
+ uif = udev->actconfig->interface[0];
+
+ dev->num_alt=uif->num_altsetting;
+ em28xx_info("Alternate settings: %i\n",dev->num_alt);
+// dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
+ dev->alt_max_pkt_size = kmalloc(32*
+ dev->num_alt,GFP_KERNEL);
+ if (dev->alt_max_pkt_size == NULL) {
+ em28xx_errdev("out of memory!\n");
+ em28xx_devused&=~(1<<nr);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < dev->num_alt ; i++) {
+ u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
+ wMaxPacketSize);
+ dev->alt_max_pkt_size[i] =
+ (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
+ em28xx_info("Alternate setting %i, max size= %i\n",i,
+ dev->alt_max_pkt_size[i]);
+ }
+
+ if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
+ model=card[nr];
+
+ if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
+ em28xx_errdev( "Your board has no eeprom inside it and thus can't\n"
+ "%s: be autodetected. Please pass card=<n> insmod option to\n"
+ "%s: workaround that. Redirect complaints to the vendor of\n"
+ "%s: the TV card. Generic type will be used."
+ "%s: Best regards,\n"
+ "%s: -- tux\n",
+ dev->name,dev->name,dev->name,dev->name,dev->name);
+ em28xx_errdev("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
+ dev->name);
+ for (i = 0; i < em28xx_bcount; i++) {
+ em28xx_errdev(" card=%d -> %s\n", i,
+ em28xx_boards[i].name);
+ }
+ }
+
+ /* allocate device struct */
+ retval = em28xx_init_dev(&dev, udev, nr, model);
+ if (retval)
+ return retval;
+
+ em28xx_info("Found %s\n", em28xx_boards[model].name);
+
+ /* save our data pointer in this interface device */
+ usb_set_intfdata(interface, dev);
+ return 0;
+}
+
+/*
+ * em28xx_usb_disconnect()
+ * called when the device gets diconencted
+ * video device will be unregistered on v4l2_close in case it is still open
+ */
+static void em28xx_usb_disconnect(struct usb_interface *interface)
+{
+ struct em28xx *dev = usb_get_intfdata(interface);
+ usb_set_intfdata(interface, NULL);
+
+ if (!dev)
+ return;
+
+ down_write(&em28xx_disconnect);
+
+ mutex_lock(&dev->lock);
+
+ em28xx_info("disconnecting %s\n", dev->vdev->name);
+
+ wake_up_interruptible_all(&dev->open);
+
+ if (dev->users) {
+ em28xx_warn
+ ("device /dev/video%d is open! Deregistration and memory "
+ "deallocation are deferred on close.\n",
+ dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
+
+ dev->state |= DEV_MISCONFIGURED;
+ em28xx_uninit_isoc(dev);
+ dev->state |= DEV_DISCONNECTED;
+ wake_up_interruptible(&dev->wait_frame);
+ wake_up_interruptible(&dev->wait_stream);
+ } else {
+ dev->state |= DEV_DISCONNECTED;
+ em28xx_release_resources(dev);
+ }
+
+ mutex_unlock(&dev->lock);
+
+ if (!dev->users) {
+ kfree(dev->alt_max_pkt_size);
+ kfree(dev);
+ }
+
+ up_write(&em28xx_disconnect);
+}
+
+static struct usb_driver em28xx_usb_driver = {
+ .name = "em28xx",
+ .probe = em28xx_usb_probe,
+ .disconnect = em28xx_usb_disconnect,
+ .id_table = em28xx_id_table,
+};
+
+static int __init em28xx_module_init(void)
+{
+ int result;
+
+ printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
+ (EM28XX_VERSION_CODE >> 16) & 0xff,
+ (EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
+#ifdef SNAPSHOT
+ printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
+ SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
+#endif
+
+ /* register this driver with the USB subsystem */
+ result = usb_register(&em28xx_usb_driver);
+ if (result)
+ em28xx_err(DRIVER_NAME
+ " usb_register failed. Error number %d.\n", result);
+
+ return result;
+}
+
+static void __exit em28xx_module_exit(void)
+{
+ /* deregister this driver with the USB subsystem */
+ usb_deregister(&em28xx_usb_driver);
+}
+
+module_init(em28xx_module_init);
+module_exit(em28xx_module_exit);
git://git.onelab.eu / linux-2.6.git / blobdiff