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 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #include <media/v4l2-device.h> 25 26 #include "cx23885.h" 27 #include "cx23885-ir.h" 28 #include "cx23885-input.h" 29 30 #define CX23885_IR_RX_FIFO_SERVICE_REQ 0 31 #define CX23885_IR_RX_END_OF_RX_DETECTED 1 32 #define CX23885_IR_RX_HW_FIFO_OVERRUN 2 33 #define CX23885_IR_RX_SW_FIFO_OVERRUN 3 34 35 #define CX23885_IR_TX_FIFO_SERVICE_REQ 0 36 37 38 void cx23885_ir_rx_work_handler(struct work_struct *work) 39 { 40 struct cx23885_dev *dev = 41 container_of(work, struct cx23885_dev, ir_rx_work); 42 u32 events = 0; 43 unsigned long *notifications = &dev->ir_rx_notifications; 44 45 if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications)) 46 events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN; 47 if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications)) 48 events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN; 49 if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications)) 50 events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED; 51 if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications)) 52 events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ; 53 54 if (events == 0) 55 return; 56 57 if (dev->kernel_ir) 58 cx23885_input_rx_work_handler(dev, events); 59 } 60 61 void cx23885_ir_tx_work_handler(struct work_struct *work) 62 { 63 struct cx23885_dev *dev = 64 container_of(work, struct cx23885_dev, ir_tx_work); 65 u32 events = 0; 66 unsigned long *notifications = &dev->ir_tx_notifications; 67 68 if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications)) 69 events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ; 70 71 if (events == 0) 72 return; 73 74 } 75 76 /* Possibly called in an IRQ context */ 77 void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events) 78 { 79 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev); 80 unsigned long *notifications = &dev->ir_rx_notifications; 81 82 if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ) 83 set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications); 84 if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED) 85 set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications); 86 if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN) 87 set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications); 88 if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN) 89 set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications); 90 91 /* 92 * For the integrated AV core, we are already in a workqueue context. 93 * For the CX23888 integrated IR, we are in an interrupt context. 94 */ 95 if (sd == dev->sd_cx25840) 96 cx23885_ir_rx_work_handler(&dev->ir_rx_work); 97 else 98 schedule_work(&dev->ir_rx_work); 99 } 100 101 /* Possibly called in an IRQ context */ 102 void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events) 103 { 104 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev); 105 unsigned long *notifications = &dev->ir_tx_notifications; 106 107 if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ) 108 set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications); 109 110 /* 111 * For the integrated AV core, we are already in a workqueue context. 112 * For the CX23888 integrated IR, we are in an interrupt context. 113 */ 114 if (sd == dev->sd_cx25840) 115 cx23885_ir_tx_work_handler(&dev->ir_tx_work); 116 else 117 schedule_work(&dev->ir_tx_work); 118 } 119