diff options
Diffstat (limited to 'drivers/media/pci/cx23885/cx23885-ir.c')
| -rw-r--r-- | drivers/media/pci/cx23885/cx23885-ir.c | 104 |
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); +} |