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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for the Conexant CX23885/7/8 PCIe bridge4 *5 * Infrared device support routines - non-input, non-vl42_subdev routines6 *7 * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net>8 */9 10#include "cx23885.h"11#include "cx23885-ir.h"12#include "cx23885-input.h"13 14#include <media/v4l2-device.h>15 16#define CX23885_IR_RX_FIFO_SERVICE_REQ 017#define CX23885_IR_RX_END_OF_RX_DETECTED 118#define CX23885_IR_RX_HW_FIFO_OVERRUN 219#define CX23885_IR_RX_SW_FIFO_OVERRUN 320 21#define CX23885_IR_TX_FIFO_SERVICE_REQ 022 23 24void cx23885_ir_rx_work_handler(struct work_struct *work)25{26 struct cx23885_dev *dev =27 container_of(work, struct cx23885_dev, ir_rx_work);28 u32 events = 0;29 unsigned long *notifications = &dev->ir_rx_notifications;30 31 if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications))32 events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN;33 if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications))34 events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN;35 if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications))36 events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED;37 if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications))38 events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ;39 40 if (events == 0)41 return;42 43 if (dev->kernel_ir)44 cx23885_input_rx_work_handler(dev, events);45}46 47void cx23885_ir_tx_work_handler(struct work_struct *work)48{49 struct cx23885_dev *dev =50 container_of(work, struct cx23885_dev, ir_tx_work);51 u32 events = 0;52 unsigned long *notifications = &dev->ir_tx_notifications;53 54 if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications))55 events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ;56 57 if (events == 0)58 return;59 60}61 62/* Possibly called in an IRQ context */63void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)64{65 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);66 unsigned long *notifications = &dev->ir_rx_notifications;67 68 if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ)69 set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications);70 if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED)71 set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications);72 if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN)73 set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications);74 if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN)75 set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications);76 77 /*78 * For the integrated AV core, we are already in a workqueue context.79 * For the CX23888 integrated IR, we are in an interrupt context.80 */81 if (sd == dev->sd_cx25840)82 cx23885_ir_rx_work_handler(&dev->ir_rx_work);83 else84 schedule_work(&dev->ir_rx_work);85}86 87/* Possibly called in an IRQ context */88void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)89{90 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);91 unsigned long *notifications = &dev->ir_tx_notifications;92 93 if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ)94 set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications);95 96 /*97 * For the integrated AV core, we are already in a workqueue context.98 * For the CX23888 integrated IR, we are in an interrupt context.99 */100 if (sd == dev->sd_cx25840)101 cx23885_ir_tx_work_handler(&dev->ir_tx_work);102 else103 schedule_work(&dev->ir_tx_work);104}105