558 lines
13 KiB
C
558 lines
13 KiB
C
/*
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* Driver for the Auvitek USB bridge
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*
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* Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "au0828.h"
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <linux/mutex.h>
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/* Due to enum tuner_pad_index */
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#include <media/tuner.h>
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/*
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* 1 = General debug messages
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* 2 = USB handling
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* 4 = I2C related
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* 8 = Bridge related
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* 16 = IR related
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*/
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int au0828_debug;
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module_param_named(debug, au0828_debug, int, 0644);
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MODULE_PARM_DESC(debug,
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"set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR");
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static unsigned int disable_usb_speed_check;
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module_param(disable_usb_speed_check, int, 0444);
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MODULE_PARM_DESC(disable_usb_speed_check,
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"override min bandwidth requirement of 480M bps");
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#define _AU0828_BULKPIPE 0x03
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#define _BULKPIPESIZE 0xffff
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static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index);
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static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index, unsigned char *cp, u16 size);
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/* USB Direction */
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#define CMD_REQUEST_IN 0x00
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#define CMD_REQUEST_OUT 0x01
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u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
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{
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u8 result = 0;
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recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
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dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
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return result;
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}
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u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
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{
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dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
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return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
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}
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static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index)
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{
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int status = -ENODEV;
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if (dev->usbdev) {
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/* cp must be memory that has been allocated by kmalloc */
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status = usb_control_msg(dev->usbdev,
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usb_sndctrlpipe(dev->usbdev, 0),
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request,
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USB_DIR_OUT | USB_TYPE_VENDOR |
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USB_RECIP_DEVICE,
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value, index, NULL, 0, 1000);
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status = min(status, 0);
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if (status < 0) {
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pr_err("%s() Failed sending control message, error %d.\n",
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__func__, status);
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}
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}
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return status;
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}
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static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
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u16 index, unsigned char *cp, u16 size)
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{
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int status = -ENODEV;
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mutex_lock(&dev->mutex);
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if (dev->usbdev) {
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status = usb_control_msg(dev->usbdev,
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usb_rcvctrlpipe(dev->usbdev, 0),
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request,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, index,
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dev->ctrlmsg, size, 1000);
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status = min(status, 0);
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if (status < 0) {
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pr_err("%s() Failed receiving control message, error %d.\n",
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__func__, status);
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}
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/* the host controller requires heap allocated memory, which
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is why we didn't just pass "cp" into usb_control_msg */
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memcpy(cp, dev->ctrlmsg, size);
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}
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mutex_unlock(&dev->mutex);
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return status;
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}
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static void au0828_unregister_media_device(struct au0828_dev *dev)
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{
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#ifdef CONFIG_MEDIA_CONTROLLER
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if (dev->media_dev) {
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media_device_unregister(dev->media_dev);
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media_device_cleanup(dev->media_dev);
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kfree(dev->media_dev);
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dev->media_dev = NULL;
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}
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#endif
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}
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static void au0828_usb_release(struct au0828_dev *dev)
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{
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au0828_unregister_media_device(dev);
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/* I2C */
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au0828_i2c_unregister(dev);
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kfree(dev);
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}
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#ifdef CONFIG_VIDEO_AU0828_V4L2
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static void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
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{
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#ifdef CONFIG_MEDIA_CONTROLLER
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int i;
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for (i = 0; i < AU0828_MAX_INPUT; i++) {
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if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
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return;
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media_device_unregister_entity(&dev->input_ent[i]);
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}
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#endif
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}
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static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
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{
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struct au0828_dev *dev =
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container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
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v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
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v4l2_device_unregister(&dev->v4l2_dev);
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au0828_usb_v4l2_media_release(dev);
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au0828_usb_release(dev);
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}
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#endif
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static void au0828_usb_disconnect(struct usb_interface *interface)
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{
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struct au0828_dev *dev = usb_get_intfdata(interface);
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dprintk(1, "%s()\n", __func__);
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/* there is a small window after disconnect, before
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dev->usbdev is NULL, for poll (e.g: IR) try to access
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the device and fill the dmesg with error messages.
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Set the status so poll routines can check and avoid
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access after disconnect.
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*/
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dev->dev_state = DEV_DISCONNECTED;
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au0828_rc_unregister(dev);
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/* Digital TV */
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au0828_dvb_unregister(dev);
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usb_set_intfdata(interface, NULL);
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mutex_lock(&dev->mutex);
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dev->usbdev = NULL;
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mutex_unlock(&dev->mutex);
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#ifdef CONFIG_VIDEO_AU0828_V4L2
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if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) {
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au0828_analog_unregister(dev);
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v4l2_device_disconnect(&dev->v4l2_dev);
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v4l2_device_put(&dev->v4l2_dev);
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/*
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* No need to call au0828_usb_release() if V4L2 is enabled,
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* as this is already called via au0828_usb_v4l2_release()
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*/
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return;
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}
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#endif
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au0828_usb_release(dev);
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}
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static int au0828_media_device_init(struct au0828_dev *dev,
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struct usb_device *udev)
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{
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#ifdef CONFIG_MEDIA_CONTROLLER
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struct media_device *mdev;
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mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
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if (!mdev)
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return -ENOMEM;
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mdev->dev = &udev->dev;
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if (!dev->board.name)
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strlcpy(mdev->model, "unknown au0828", sizeof(mdev->model));
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else
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strlcpy(mdev->model, dev->board.name, sizeof(mdev->model));
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if (udev->serial)
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strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
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strcpy(mdev->bus_info, udev->devpath);
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mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
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mdev->driver_version = LINUX_VERSION_CODE;
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media_device_init(mdev);
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dev->media_dev = mdev;
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#endif
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return 0;
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}
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static int au0828_create_media_graph(struct au0828_dev *dev)
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{
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#ifdef CONFIG_MEDIA_CONTROLLER
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struct media_device *mdev = dev->media_dev;
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struct media_entity *entity;
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struct media_entity *tuner = NULL, *decoder = NULL;
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int i, ret;
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if (!mdev)
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return 0;
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media_device_for_each_entity(entity, mdev) {
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switch (entity->function) {
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case MEDIA_ENT_F_TUNER:
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tuner = entity;
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break;
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case MEDIA_ENT_F_ATV_DECODER:
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decoder = entity;
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break;
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}
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}
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/* Analog setup, using tuner as a link */
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/* Something bad happened! */
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if (!decoder)
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return -EINVAL;
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if (tuner) {
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ret = media_create_pad_link(tuner, TUNER_PAD_IF_OUTPUT,
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decoder, 0,
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MEDIA_LNK_FL_ENABLED);
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if (ret)
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return ret;
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}
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ret = media_create_pad_link(decoder, 1, &dev->vdev.entity, 0,
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MEDIA_LNK_FL_ENABLED);
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if (ret)
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return ret;
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ret = media_create_pad_link(decoder, 2, &dev->vbi_dev.entity, 0,
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MEDIA_LNK_FL_ENABLED);
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if (ret)
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return ret;
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for (i = 0; i < AU0828_MAX_INPUT; i++) {
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struct media_entity *ent = &dev->input_ent[i];
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if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
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break;
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switch (AUVI_INPUT(i).type) {
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case AU0828_VMUX_CABLE:
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case AU0828_VMUX_TELEVISION:
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case AU0828_VMUX_DVB:
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if (!tuner)
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break;
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ret = media_create_pad_link(ent, 0, tuner,
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TUNER_PAD_RF_INPUT,
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MEDIA_LNK_FL_ENABLED);
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if (ret)
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return ret;
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break;
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case AU0828_VMUX_COMPOSITE:
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case AU0828_VMUX_SVIDEO:
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default: /* AU0828_VMUX_DEBUG */
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/* FIXME: fix the decoder PAD */
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ret = media_create_pad_link(ent, 0, decoder, 0, 0);
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if (ret)
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return ret;
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break;
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}
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}
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#endif
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return 0;
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}
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static int au0828_usb_probe(struct usb_interface *interface,
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const struct usb_device_id *id)
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{
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int ifnum;
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int retval = 0;
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struct au0828_dev *dev;
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struct usb_device *usbdev = interface_to_usbdev(interface);
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ifnum = interface->altsetting->desc.bInterfaceNumber;
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if (ifnum != 0)
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return -ENODEV;
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dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
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le16_to_cpu(usbdev->descriptor.idVendor),
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le16_to_cpu(usbdev->descriptor.idProduct),
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ifnum);
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/*
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* Make sure we have 480 Mbps of bandwidth, otherwise things like
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* video stream wouldn't likely work, since 12 Mbps is generally
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* not enough even for most Digital TV streams.
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*/
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if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
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pr_err("au0828: Device initialization failed.\n");
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pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n");
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return -ENODEV;
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}
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (dev == NULL) {
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pr_err("%s() Unable to allocate memory\n", __func__);
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return -ENOMEM;
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}
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mutex_init(&dev->lock);
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mutex_lock(&dev->lock);
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mutex_init(&dev->mutex);
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mutex_init(&dev->dvb.lock);
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dev->usbdev = usbdev;
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dev->boardnr = id->driver_info;
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dev->board = au0828_boards[dev->boardnr];
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/* Initialize the media controller */
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retval = au0828_media_device_init(dev, usbdev);
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if (retval) {
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pr_err("%s() au0828_media_device_init failed\n",
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__func__);
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mutex_unlock(&dev->lock);
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kfree(dev);
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return retval;
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}
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#ifdef CONFIG_VIDEO_AU0828_V4L2
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dev->v4l2_dev.release = au0828_usb_v4l2_release;
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/* Create the v4l2_device */
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#ifdef CONFIG_MEDIA_CONTROLLER
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dev->v4l2_dev.mdev = dev->media_dev;
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#endif
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retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
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if (retval) {
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pr_err("%s() v4l2_device_register failed\n",
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__func__);
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mutex_unlock(&dev->lock);
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kfree(dev);
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return retval;
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}
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/* This control handler will inherit the controls from au8522 */
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retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
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if (retval) {
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pr_err("%s() v4l2_ctrl_handler_init failed\n",
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__func__);
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mutex_unlock(&dev->lock);
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kfree(dev);
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return retval;
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}
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dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
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#endif
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/* Power Up the bridge */
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au0828_write(dev, REG_600, 1 << 4);
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/* Bring up the GPIO's and supporting devices */
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au0828_gpio_setup(dev);
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/* I2C */
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au0828_i2c_register(dev);
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/* Setup */
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au0828_card_setup(dev);
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#ifdef CONFIG_VIDEO_AU0828_V4L2
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/* Analog TV */
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if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
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au0828_analog_register(dev, interface);
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#endif
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/* Digital TV */
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retval = au0828_dvb_register(dev);
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if (retval)
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pr_err("%s() au0282_dev_register failed\n",
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__func__);
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/* Remote controller */
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au0828_rc_register(dev);
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/*
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* Store the pointer to the au0828_dev so it can be accessed in
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* au0828_usb_disconnect
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*/
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usb_set_intfdata(interface, dev);
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pr_info("Registered device AU0828 [%s]\n",
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dev->board.name == NULL ? "Unset" : dev->board.name);
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mutex_unlock(&dev->lock);
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retval = au0828_create_media_graph(dev);
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if (retval) {
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pr_err("%s() au0282_dev_register failed to create graph\n",
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__func__);
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goto done;
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}
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#ifdef CONFIG_MEDIA_CONTROLLER
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retval = media_device_register(dev->media_dev);
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#endif
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done:
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if (retval < 0)
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au0828_usb_disconnect(interface);
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return retval;
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}
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static int au0828_suspend(struct usb_interface *interface,
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pm_message_t message)
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{
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struct au0828_dev *dev = usb_get_intfdata(interface);
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if (!dev)
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return 0;
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pr_info("Suspend\n");
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au0828_rc_suspend(dev);
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au0828_v4l2_suspend(dev);
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au0828_dvb_suspend(dev);
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/* FIXME: should suspend also ATV/DTV */
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return 0;
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}
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static int au0828_resume(struct usb_interface *interface)
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{
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struct au0828_dev *dev = usb_get_intfdata(interface);
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if (!dev)
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return 0;
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pr_info("Resume\n");
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/* Power Up the bridge */
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au0828_write(dev, REG_600, 1 << 4);
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/* Bring up the GPIO's and supporting devices */
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au0828_gpio_setup(dev);
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au0828_rc_resume(dev);
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au0828_v4l2_resume(dev);
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au0828_dvb_resume(dev);
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/* FIXME: should resume also ATV/DTV */
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return 0;
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}
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static struct usb_driver au0828_usb_driver = {
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.name = KBUILD_MODNAME,
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.probe = au0828_usb_probe,
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.disconnect = au0828_usb_disconnect,
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.id_table = au0828_usb_id_table,
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.suspend = au0828_suspend,
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.resume = au0828_resume,
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.reset_resume = au0828_resume,
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};
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static int __init au0828_init(void)
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{
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int ret;
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if (au0828_debug & 1)
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pr_info("%s() Debugging is enabled\n", __func__);
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if (au0828_debug & 2)
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pr_info("%s() USB Debugging is enabled\n", __func__);
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if (au0828_debug & 4)
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pr_info("%s() I2C Debugging is enabled\n", __func__);
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|
|
if (au0828_debug & 8)
|
|
pr_info("%s() Bridge Debugging is enabled\n",
|
|
__func__);
|
|
|
|
if (au0828_debug & 16)
|
|
pr_info("%s() IR Debugging is enabled\n",
|
|
__func__);
|
|
|
|
pr_info("au0828 driver loaded\n");
|
|
|
|
ret = usb_register(&au0828_usb_driver);
|
|
if (ret)
|
|
pr_err("usb_register failed, error = %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit au0828_exit(void)
|
|
{
|
|
usb_deregister(&au0828_usb_driver);
|
|
}
|
|
|
|
module_init(au0828_init);
|
|
module_exit(au0828_exit);
|
|
|
|
MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
|
|
MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION("0.0.3");
|