1 /* 2 * Driver for the Conexant CX23885/7/8 PCIe bridge 3 * 4 * Infrared device support routines - non-input, non-vl42_subdev routines 5 * 6 * Copyright (C) 2009 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 19 #include "cx23885.h" 20 #include "cx23885-ir.h" 21 #include "cx23885-input.h" 22 23 #include <media/v4l2-device.h> 24 25 #define CX23885_IR_RX_FIFO_SERVICE_REQ 0 26 #define CX23885_IR_RX_END_OF_RX_DETECTED 1 27 #define CX23885_IR_RX_HW_FIFO_OVERRUN 2 28 #define CX23885_IR_RX_SW_FIFO_OVERRUN 3 29 30 #define CX23885_IR_TX_FIFO_SERVICE_REQ 0 31 32 33 void cx23885_ir_rx_work_handler(struct work_struct *work) 34 { 35 struct cx23885_dev *dev = 36 container_of(work, struct cx23885_dev, ir_rx_work); 37 u32 events = 0; 38 unsigned long *notifications = &dev->ir_rx_notifications; 39 40 if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications)) 41 events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN; 42 if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications)) 43 events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN; 44 if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications)) 45 events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED; 46 if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications)) 47 events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ; 48 49 if (events == 0) 50 return; 51 52 if (dev->kernel_ir) 53 cx23885_input_rx_work_handler(dev, events); 54 } 55 56 void cx23885_ir_tx_work_handler(struct work_struct *work) 57 { 58 struct cx23885_dev *dev = 59 container_of(work, struct cx23885_dev, ir_tx_work); 60 u32 events = 0; 61 unsigned long *notifications = &dev->ir_tx_notifications; 62 63 if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications)) 64 events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ; 65 66 if (events == 0) 67 return; 68 69 } 70 71 /* Possibly called in an IRQ context */ 72 void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events) 73 { 74 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev); 75 unsigned long *notifications = &dev->ir_rx_notifications; 76 77 if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ) 78 set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications); 79 if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED) 80 set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications); 81 if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN) 82 set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications); 83 if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN) 84 set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications); 85 86 /* 87 * For the integrated AV core, we are already in a workqueue context. 88 * For the CX23888 integrated IR, we are in an interrupt context. 89 */ 90 if (sd == dev->sd_cx25840) 91 cx23885_ir_rx_work_handler(&dev->ir_rx_work); 92 else 93 schedule_work(&dev->ir_rx_work); 94 } 95 96 /* Possibly called in an IRQ context */ 97 void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events) 98 { 99 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev); 100 unsigned long *notifications = &dev->ir_tx_notifications; 101 102 if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ) 103 set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications); 104 105 /* 106 * For the integrated AV core, we are already in a workqueue context. 107 * For the CX23888 integrated IR, we are in an interrupt context. 108 */ 109 if (sd == dev->sd_cx25840) 110 cx23885_ir_tx_work_handler(&dev->ir_tx_work); 111 else 112 schedule_work(&dev->ir_tx_work); 113 } 114