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path: root/drivers/media/pci/cx23885/cx23885-ir.c
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Diffstat (limited to 'drivers/media/pci/cx23885/cx23885-ir.c')
-rw-r--r--drivers/media/pci/cx23885/cx23885-ir.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/media/pci/cx23885/cx23885-ir.c b/drivers/media/pci/cx23885/cx23885-ir.c
new file mode 100644
index 000000000..45befc272
--- /dev/null
+++ b/drivers/media/pci/cx23885/cx23885-ir.c
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ */
+
+#include "cx23885.h"
+#include "cx23885-ir.h"
+#include "cx23885-input.h"
+
+#include <media/v4l2-device.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);
+}