drivers/media/pci/cx23885/cx23885-av.c

   1 /*
   2  *  Driver for the Conexant CX23885/7/8 PCIe bridge
   3  *
   4  *  AV device support routines - non-input, non-vl42_subdev routines
   5  *
   6  *  Copyright (C) 2010  Andy Walls <awalls@md.metrocast.net>
   7  *
   8  *  This program is free software; you can redistribute it and/or
   9  *  modify it under the terms of the GNU General Public License
  10  *  as published by the Free Software Foundation; either version 2
  11  *  of the License, or (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  */
  18
  19 #include "cx23885.h"
  20 #include "cx23885-av.h"
  21 #include "cx23885-video.h"
  22
  23 void cx23885_av_work_handler(struct work_struct *work)
  24 {
  25         struct cx23885_dev *dev =
  26                            container_of(work, struct cx23885_dev, cx25840_work);
  27         bool handled;
  28
  29         v4l2_subdev_call(dev->sd_cx25840, core, interrupt_service_routine,
  30                          PCI_MSK_AV_CORE, &handled);
  31
  32         /* Getting here with the interrupt not handled
  33            then probbaly flatiron does have pending interrupts.
  34         */
  35         if (!handled) {
  36                 /* clear left and right adc channel interrupt request flag */
  37                 cx23885_flatiron_write(dev, 0x1f,
  38                         cx23885_flatiron_read(dev, 0x1f) | 0x80);
  39                 cx23885_flatiron_write(dev, 0x23,
  40                         cx23885_flatiron_read(dev, 0x23) | 0x80);
  41         }
  42
  43         cx23885_irq_enable(dev, PCI_MSK_AV_CORE);
  44 }