1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Driver for the Conexant CX23885/7/8 PCIe bridge
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Infrared device support routines - non-input, non-vl42_subdev routines
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (C) 2009 Andy Walls <awalls@md.metrocast.net>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include "cx23885.h"
11*4882a593Smuzhiyun #include "cx23885-ir.h"
12*4882a593Smuzhiyun #include "cx23885-input.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <media/v4l2-device.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define CX23885_IR_RX_FIFO_SERVICE_REQ 0
17*4882a593Smuzhiyun #define CX23885_IR_RX_END_OF_RX_DETECTED 1
18*4882a593Smuzhiyun #define CX23885_IR_RX_HW_FIFO_OVERRUN 2
19*4882a593Smuzhiyun #define CX23885_IR_RX_SW_FIFO_OVERRUN 3
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define CX23885_IR_TX_FIFO_SERVICE_REQ 0
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun
cx23885_ir_rx_work_handler(struct work_struct * work)24*4882a593Smuzhiyun void cx23885_ir_rx_work_handler(struct work_struct *work)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun struct cx23885_dev *dev =
27*4882a593Smuzhiyun container_of(work, struct cx23885_dev, ir_rx_work);
28*4882a593Smuzhiyun u32 events = 0;
29*4882a593Smuzhiyun unsigned long *notifications = &dev->ir_rx_notifications;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications))
32*4882a593Smuzhiyun events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN;
33*4882a593Smuzhiyun if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications))
34*4882a593Smuzhiyun events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN;
35*4882a593Smuzhiyun if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications))
36*4882a593Smuzhiyun events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED;
37*4882a593Smuzhiyun if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications))
38*4882a593Smuzhiyun events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (events == 0)
41*4882a593Smuzhiyun return;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun if (dev->kernel_ir)
44*4882a593Smuzhiyun cx23885_input_rx_work_handler(dev, events);
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
cx23885_ir_tx_work_handler(struct work_struct * work)47*4882a593Smuzhiyun void cx23885_ir_tx_work_handler(struct work_struct *work)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun struct cx23885_dev *dev =
50*4882a593Smuzhiyun container_of(work, struct cx23885_dev, ir_tx_work);
51*4882a593Smuzhiyun u32 events = 0;
52*4882a593Smuzhiyun unsigned long *notifications = &dev->ir_tx_notifications;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications))
55*4882a593Smuzhiyun events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun if (events == 0)
58*4882a593Smuzhiyun return;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun /* Possibly called in an IRQ context */
cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev * sd,u32 events)63*4882a593Smuzhiyun void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
64*4882a593Smuzhiyun {
65*4882a593Smuzhiyun struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
66*4882a593Smuzhiyun unsigned long *notifications = &dev->ir_rx_notifications;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ)
69*4882a593Smuzhiyun set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications);
70*4882a593Smuzhiyun if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED)
71*4882a593Smuzhiyun set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications);
72*4882a593Smuzhiyun if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN)
73*4882a593Smuzhiyun set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications);
74*4882a593Smuzhiyun if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN)
75*4882a593Smuzhiyun set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun /*
78*4882a593Smuzhiyun * For the integrated AV core, we are already in a workqueue context.
79*4882a593Smuzhiyun * For the CX23888 integrated IR, we are in an interrupt context.
80*4882a593Smuzhiyun */
81*4882a593Smuzhiyun if (sd == dev->sd_cx25840)
82*4882a593Smuzhiyun cx23885_ir_rx_work_handler(&dev->ir_rx_work);
83*4882a593Smuzhiyun else
84*4882a593Smuzhiyun schedule_work(&dev->ir_rx_work);
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun /* Possibly called in an IRQ context */
cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev * sd,u32 events)88*4882a593Smuzhiyun void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
89*4882a593Smuzhiyun {
90*4882a593Smuzhiyun struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
91*4882a593Smuzhiyun unsigned long *notifications = &dev->ir_tx_notifications;
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ)
94*4882a593Smuzhiyun set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications);
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun /*
97*4882a593Smuzhiyun * For the integrated AV core, we are already in a workqueue context.
98*4882a593Smuzhiyun * For the CX23888 integrated IR, we are in an interrupt context.
99*4882a593Smuzhiyun */
100*4882a593Smuzhiyun if (sd == dev->sd_cx25840)
101*4882a593Smuzhiyun cx23885_ir_tx_work_handler(&dev->ir_tx_work);
102*4882a593Smuzhiyun else
103*4882a593Smuzhiyun schedule_work(&dev->ir_tx_work);
104*4882a593Smuzhiyun }
105