Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / drivers / media / video / cx23885 / cx23885-ir.c
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@radix.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->ir_input)
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 /* 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         schedule_work(&dev->ir_rx_work);
90 }
91
92 /* Called in an IRQ context */
93 void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
94 {
95         struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
96         unsigned long *notifications = &dev->ir_tx_notifications;
97
98         if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ)
99                 set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications);
100         schedule_work(&dev->ir_tx_work);
101 }