diff options
Diffstat (limited to 'drivers/media/video/cx231xx/cx231xx-input.c')
-rw-r--r-- | drivers/media/video/cx231xx/cx231xx-input.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-input.c b/drivers/media/video/cx231xx/cx231xx-input.c new file mode 100644 index 000000000000..6725244c400c --- /dev/null +++ b/drivers/media/video/cx231xx/cx231xx-input.c | |||
@@ -0,0 +1,122 @@ | |||
1 | /* | ||
2 | * cx231xx IR glue driver | ||
3 | * | ||
4 | * Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com> | ||
5 | * | ||
6 | * Polaris (cx231xx) has its support for IR's with a design close to MCE. | ||
7 | * however, a few designs are using an external I2C chip for IR, instead | ||
8 | * of using the one provided by the chip. | ||
9 | * This driver provides support for those extra devices | ||
10 | * | ||
11 | * This program is free software; you can redistribute it and/or | ||
12 | * modify it under the terms of the GNU General Public License as | ||
13 | * published by the Free Software Foundation version 2. | ||
14 | * | ||
15 | * This program is distributed in the hope that it will be useful, | ||
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
18 | * General Public License for more details. | ||
19 | */ | ||
20 | |||
21 | #include "cx231xx.h" | ||
22 | #include <linux/usb.h> | ||
23 | #include <linux/slab.h> | ||
24 | |||
25 | #define MODULE_NAME "cx231xx-input" | ||
26 | |||
27 | static int get_key_isdbt(struct IR_i2c *ir, u32 *ir_key, | ||
28 | u32 *ir_raw) | ||
29 | { | ||
30 | u8 cmd; | ||
31 | |||
32 | /* poll IR chip */ | ||
33 | if (1 != i2c_master_recv(ir->c, &cmd, 1)) | ||
34 | return -EIO; | ||
35 | |||
36 | /* it seems that 0xFE indicates that a button is still hold | ||
37 | down, while 0xff indicates that no button is hold | ||
38 | down. 0xfe sequences are sometimes interrupted by 0xFF */ | ||
39 | |||
40 | if (cmd == 0xff) | ||
41 | return 0; | ||
42 | |||
43 | dev_dbg(&ir->input->dev, "scancode = %02x\n", cmd); | ||
44 | |||
45 | *ir_key = cmd; | ||
46 | *ir_raw = cmd; | ||
47 | return 1; | ||
48 | } | ||
49 | |||
50 | int cx231xx_ir_init(struct cx231xx *dev) | ||
51 | { | ||
52 | struct input_dev *input_dev; | ||
53 | struct i2c_board_info info; | ||
54 | int rc; | ||
55 | u8 ir_i2c_bus; | ||
56 | |||
57 | dev_dbg(&dev->udev->dev, "%s\n", __func__); | ||
58 | |||
59 | /* Only initialize if a rc keycode map is defined */ | ||
60 | if (!cx231xx_boards[dev->model].rc_map) | ||
61 | return -ENODEV; | ||
62 | |||
63 | input_dev = input_allocate_device(); | ||
64 | if (!input_dev) | ||
65 | return -ENOMEM; | ||
66 | |||
67 | request_module("ir-kbd-i2c"); | ||
68 | |||
69 | memset(&info, 0, sizeof(struct i2c_board_info)); | ||
70 | memset(&dev->ir.init_data, 0, sizeof(dev->ir.init_data)); | ||
71 | |||
72 | dev->ir.input_dev = input_dev; | ||
73 | dev->ir.init_data.name = cx231xx_boards[dev->model].name; | ||
74 | dev->ir.props.priv = dev; | ||
75 | dev->ir.props.allowed_protos = IR_TYPE_NEC; | ||
76 | snprintf(dev->ir.name, sizeof(dev->ir.name), | ||
77 | "cx231xx IR (%s)", cx231xx_boards[dev->model].name); | ||
78 | usb_make_path(dev->udev, dev->ir.phys, sizeof(dev->ir.phys)); | ||
79 | strlcat(dev->ir.phys, "/input0", sizeof(dev->ir.phys)); | ||
80 | |||
81 | strlcpy(info.type, "ir_video", I2C_NAME_SIZE); | ||
82 | info.platform_data = &dev->ir.init_data; | ||
83 | |||
84 | input_dev->name = dev->ir.name; | ||
85 | input_dev->phys = dev->ir.phys; | ||
86 | input_dev->dev.parent = &dev->udev->dev; | ||
87 | input_dev->id.bustype = BUS_USB; | ||
88 | input_dev->id.version = 1; | ||
89 | input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); | ||
90 | input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct); | ||
91 | |||
92 | /* | ||
93 | * Board-dependent values | ||
94 | * | ||
95 | * For now, there's just one type of hardware design using | ||
96 | * an i2c device. | ||
97 | */ | ||
98 | dev->ir.init_data.get_key = get_key_isdbt; | ||
99 | dev->ir.init_data.ir_codes = cx231xx_boards[dev->model].rc_map; | ||
100 | /* The i2c micro-controller only outputs the cmd part of NEC protocol */ | ||
101 | dev->ir.props.scanmask = 0xff; | ||
102 | info.addr = 0x30; | ||
103 | |||
104 | rc = ir_input_register(input_dev, cx231xx_boards[dev->model].rc_map, | ||
105 | &dev->ir.props, MODULE_NAME); | ||
106 | if (rc < 0) | ||
107 | return rc; | ||
108 | |||
109 | /* Load and bind ir-kbd-i2c */ | ||
110 | ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master; | ||
111 | i2c_new_device(&dev->i2c_bus[ir_i2c_bus].i2c_adap, &info); | ||
112 | |||
113 | return rc; | ||
114 | } | ||
115 | |||
116 | void cx231xx_ir_exit(struct cx231xx *dev) | ||
117 | { | ||
118 | if (dev->ir.input_dev) { | ||
119 | ir_input_unregister(dev->ir.input_dev); | ||
120 | dev->ir.input_dev = NULL; | ||
121 | } | ||
122 | } | ||