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-input.h" 28 29 #define CX23885_IR_RX_FIFO_SERVICE_REQ 0 30 #define CX23885_IR_RX_END_OF_RX_DETECTED 1 31 #define CX23885_IR_RX_HW_FIFO_OVERRUN 2 32 #define CX23885_IR_RX_SW_FIFO_OVERRUN 3 33 34 #define CX23885_IR_TX_FIFO_SERVICE_REQ 0 35 36 37 void cx23885_ir_rx_work_handler(struct work_struct *work) 38 { 39 struct cx23885_dev *dev = 40 container_of(work, struct cx23885_dev, ir_rx_work); 41 u32 events = 0; 42 unsigned long *notifications = &dev->ir_rx_notifications; 43 44 if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications)) 45 events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN; 46 if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications)) 47 events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN; 48 if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications)) 49 events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED; 50 if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications)) 51 events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ; 52 53 if (events == 0) 54 return; 55 56 if (dev->kernel_ir) 57 cx23885_input_rx_work_handler(dev, events); 58 } 59 60 void cx23885_ir_tx_work_handler(struct work_struct *work) 61 { 62 struct cx23885_dev *dev = 63 container_of(work, struct cx23885_dev, ir_tx_work); 64 u32 events = 0; 65 unsigned long *notifications = &dev->ir_tx_notifications; 66 67 if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications)) 68 events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ; 69 70 if (events == 0) 71 return; 72 73 } 74 75 /* Possibly called in an IRQ context */ 76 void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events) 77 { 78 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev); 79 unsigned long *notifications = &dev->ir_rx_notifications; 80 81 if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ) 82 set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications); 83 if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED) 84 set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications); 85 if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN) 86 set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications); 87 if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN) 88 set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications); 89 90 /* 91 * For the integrated AV core, we are already in a workqueue context. 92 * For the CX23888 integrated IR, we are in an interrupt context. 93 */ 94 if (sd == dev->sd_cx25840) 95 cx23885_ir_rx_work_handler(&dev->ir_rx_work); 96 else 97 schedule_work(&dev->ir_rx_work); 98 } 99 100 /* Possibly called in an IRQ context */ 101 void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events) 102 { 103 struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev); 104 unsigned long *notifications = &dev->ir_tx_notifications; 105 106 if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ) 107 set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications); 108 109 /* 110 * For the integrated AV core, we are already in a workqueue context. 111 * For the CX23888 integrated IR, we are in an interrupt context. 112 */ 113 if (sd == dev->sd_cx25840) 114 cx23885_ir_tx_work_handler(&dev->ir_tx_work); 115 else 116 schedule_work(&dev->ir_tx_work); 117 } 118