Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / media / pci / cx23885 / cx23885-ir.c

diff --git a/kernel/drivers/media/pci/cx23885/cx23885-ir.c b/kernel/drivers/media/pci/cx23885/cx23885-ir.c
new file mode 100644 (file)
index 0000000..89dc4cc
--- /dev/null
+++ b/kernel/drivers/media/pci/cx23885/cx23885-ir.c
@@ -0,0 +1,113 @@
+/*
+ *  Driver for the Conexant CX23885/7/8 PCIe bridge
+ *
+ *  Infrared device support routines - non-input, non-vl42_subdev routines
+ *
+ *  Copyright (C) 2009  Andy Walls <awalls@md.metrocast.net>
+ *
+ *  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.
+ */
+
+#include <media/v4l2-device.h>
+
+#include "cx23885.h"
+#include "cx23885-ir.h"
+#include "cx23885-input.h"
+
+#define CX23885_IR_RX_FIFO_SERVICE_REQ         0
+#define CX23885_IR_RX_END_OF_RX_DETECTED       1
+#define CX23885_IR_RX_HW_FIFO_OVERRUN          2
+#define CX23885_IR_RX_SW_FIFO_OVERRUN          3
+
+#define CX23885_IR_TX_FIFO_SERVICE_REQ         0
+
+
+void cx23885_ir_rx_work_handler(struct work_struct *work)
+{
+       struct cx23885_dev *dev =
+                            container_of(work, struct cx23885_dev, ir_rx_work);
+       u32 events = 0;
+       unsigned long *notifications = &dev->ir_rx_notifications;
+
+       if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications))
+               events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN;
+       if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications))
+               events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN;
+       if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications))
+               events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED;
+       if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications))
+               events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ;
+
+       if (events == 0)
+               return;
+
+       if (dev->kernel_ir)
+               cx23885_input_rx_work_handler(dev, events);
+}
+
+void cx23885_ir_tx_work_handler(struct work_struct *work)
+{
+       struct cx23885_dev *dev =
+                            container_of(work, struct cx23885_dev, ir_tx_work);
+       u32 events = 0;
+       unsigned long *notifications = &dev->ir_tx_notifications;
+
+       if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications))
+               events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ;
+
+       if (events == 0)
+               return;
+
+}
+
+/* Possibly called in an IRQ context */
+void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
+{
+       struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
+       unsigned long *notifications = &dev->ir_rx_notifications;
+
+       if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ)
+               set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications);
+       if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED)
+               set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications);
+       if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN)
+               set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications);
+       if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN)
+               set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications);
+
+       /*
+        * For the integrated AV core, we are already in a workqueue context.
+        * For the CX23888 integrated IR, we are in an interrupt context.
+        */
+       if (sd == dev->sd_cx25840)
+               cx23885_ir_rx_work_handler(&dev->ir_rx_work);
+       else
+               schedule_work(&dev->ir_rx_work);
+}
+
+/* Possibly called in an IRQ context */
+void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
+{
+       struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
+       unsigned long *notifications = &dev->ir_tx_notifications;
+
+       if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ)
+               set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications);
+
+       /*
+        * For the integrated AV core, we are already in a workqueue context.
+        * For the CX23888 integrated IR, we are in an interrupt context.
+        */
+       if (sd == dev->sd_cx25840)
+               cx23885_ir_tx_work_handler(&dev->ir_tx_work);
+       else
+               schedule_work(&dev->ir_tx_work);
+}