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
cx23885_ir_rx_work_handler(struct work_struct * work)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
cx23885_ir_tx_work_handler(struct work_struct * work)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 */
cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev * sd,u32 events)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 */
cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev * sd,u32 events)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