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  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #include "cx23885.h"
  25 #include "cx23885-av.h"
  26 #include "cx23885-video.h"
  27
  28 void cx23885_av_work_handler(struct work_struct *work)
  29 {
  30         struct cx23885_dev *dev =
  31                            container_of(work, struct cx23885_dev, cx25840_work);
  32         bool handled;
  33
  34         v4l2_subdev_call(dev->sd_cx25840, core, interrupt_service_routine,
  35                          PCI_MSK_AV_CORE, &handled);
  36
  37         /* Getting here with the interrupt not handled
  38            then probbaly flatiron does have pending interrupts.
  39         */
  40         if (!handled) {
  41                 /* clear left and right adc channel interrupt request flag */
  42                 cx23885_flatiron_write(dev, 0x1f,
  43                         cx23885_flatiron_read(dev, 0x1f) | 0x80);
  44                 cx23885_flatiron_write(dev, 0x23,
  45                         cx23885_flatiron_read(dev, 0x23) | 0x80);
  46         }
  47
  48         cx23885_irq_enable(dev, PCI_MSK_AV_CORE);
  49 }