Commit | Line | Data |
---|---|---|
9ab66912 MCC |
1 | /* |
2 | * cx231xx IR glue driver | |
3 | * | |
37e59f87 | 4 | * Copyright (C) 2010 Mauro Carvalho Chehab |
9ab66912 MCC |
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" | |
9ab66912 | 22 | #include <linux/slab.h> |
4dd9bb91 | 23 | #include <linux/bitrev.h> |
9ab66912 MCC |
24 | |
25 | #define MODULE_NAME "cx231xx-input" | |
26 | ||
4dd9bb91 DH |
27 | static int get_key_isdbt(struct IR_i2c *ir, enum rc_type *protocol, |
28 | u32 *pscancode, u8 *toggle) | |
9ab66912 | 29 | { |
90bf3aab | 30 | int rc; |
e330289e | 31 | u8 cmd, scancode; |
9ab66912 | 32 | |
141bb0dc MCC |
33 | dev_dbg(&ir->rc->input_dev->dev, "%s\n", __func__); |
34 | ||
9ab66912 | 35 | /* poll IR chip */ |
90bf3aab MCC |
36 | rc = i2c_master_recv(ir->c, &cmd, 1); |
37 | if (rc < 0) | |
38 | return rc; | |
39 | if (rc != 1) | |
9ab66912 MCC |
40 | return -EIO; |
41 | ||
42 | /* it seems that 0xFE indicates that a button is still hold | |
43 | down, while 0xff indicates that no button is hold | |
44 | down. 0xfe sequences are sometimes interrupted by 0xFF */ | |
45 | ||
46 | if (cmd == 0xff) | |
47 | return 0; | |
48 | ||
4dd9bb91 | 49 | scancode = bitrev8(cmd); |
9ab66912 | 50 | |
e330289e MCC |
51 | dev_dbg(&ir->rc->input_dev->dev, "cmd %02x, scan = %02x\n", |
52 | cmd, scancode); | |
53 | ||
4dd9bb91 DH |
54 | *protocol = RC_TYPE_OTHER; |
55 | *pscancode = scancode; | |
56 | *toggle = 0; | |
9ab66912 MCC |
57 | return 1; |
58 | } | |
59 | ||
60 | int cx231xx_ir_init(struct cx231xx *dev) | |
61 | { | |
9ab66912 | 62 | struct i2c_board_info info; |
9ab66912 MCC |
63 | u8 ir_i2c_bus; |
64 | ||
336fea92 | 65 | dev_dbg(dev->dev, "%s\n", __func__); |
9ab66912 MCC |
66 | |
67 | /* Only initialize if a rc keycode map is defined */ | |
29e3ec19 | 68 | if (!cx231xx_boards[dev->model].rc_map_name) |
9ab66912 MCC |
69 | return -ENODEV; |
70 | ||
9ab66912 MCC |
71 | request_module("ir-kbd-i2c"); |
72 | ||
73 | memset(&info, 0, sizeof(struct i2c_board_info)); | |
141bb0dc MCC |
74 | memset(&dev->init_data, 0, sizeof(dev->init_data)); |
75 | dev->init_data.rc_dev = rc_allocate_device(); | |
76 | if (!dev->init_data.rc_dev) | |
77 | return -ENOMEM; | |
9ab66912 | 78 | |
141bb0dc | 79 | dev->init_data.name = cx231xx_boards[dev->model].name; |
9ab66912 MCC |
80 | |
81 | strlcpy(info.type, "ir_video", I2C_NAME_SIZE); | |
141bb0dc | 82 | info.platform_data = &dev->init_data; |
9ab66912 MCC |
83 | |
84 | /* | |
85 | * Board-dependent values | |
86 | * | |
87 | * For now, there's just one type of hardware design using | |
88 | * an i2c device. | |
89 | */ | |
141bb0dc | 90 | dev->init_data.get_key = get_key_isdbt; |
29e3ec19 | 91 | dev->init_data.ir_codes = cx231xx_boards[dev->model].rc_map_name; |
9ab66912 | 92 | /* The i2c micro-controller only outputs the cmd part of NEC protocol */ |
9d2f1d3c | 93 | dev->init_data.rc_dev->scancode_mask = 0xff; |
141bb0dc | 94 | dev->init_data.rc_dev->driver_name = "cx231xx"; |
c003ab1b | 95 | dev->init_data.type = RC_BIT_NEC; |
9ab66912 MCC |
96 | info.addr = 0x30; |
97 | ||
9ab66912 MCC |
98 | /* Load and bind ir-kbd-i2c */ |
99 | ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master; | |
336fea92 | 100 | dev_dbg(dev->dev, "Trying to bind ir at bus %d, addr 0x%02x\n", |
141bb0dc | 101 | ir_i2c_bus, info.addr); |
c3c3f1ae MS |
102 | dev->ir_i2c_client = i2c_new_device( |
103 | cx231xx_get_i2c_adap(dev, ir_i2c_bus), &info); | |
9ab66912 | 104 | |
141bb0dc | 105 | return 0; |
9ab66912 MCC |
106 | } |
107 | ||
108 | void cx231xx_ir_exit(struct cx231xx *dev) | |
109 | { | |
7528cd27 MCC |
110 | if (dev->ir_i2c_client) |
111 | i2c_unregister_device(dev->ir_i2c_client); | |
112 | dev->ir_i2c_client = NULL; | |
9ab66912 | 113 | } |