projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9ab66912 MCC |
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 | ||
| 141bb0dc MCC |
32 | dev_dbg(&ir->rc->input_dev->dev, "%s\n", __func__); |
| 33 | ||
| 9ab66912 MCC |
34 | /* poll IR chip */ |
| 35 | if (1 != i2c_master_recv(ir->c, &cmd, 1)) | |
| 36 | return -EIO; | |
| 37 | ||
| 38 | /* it seems that 0xFE indicates that a button is still hold | |
| 39 | down, while 0xff indicates that no button is hold | |
| 40 | down. 0xfe sequences are sometimes interrupted by 0xFF */ | |
| 41 | ||
| 42 | if (cmd == 0xff) | |
| 43 | return 0; | |
| 44 | ||
| 141bb0dc | 45 | dev_dbg(&ir->rc->input_dev->dev, "scancode = %02x\n", cmd); |
| 9ab66912 MCC |
46 | |
| 47 | *ir_key = cmd; | |
| 48 | *ir_raw = cmd; | |
| 49 | return 1; | |
| 50 | } | |
| 51 | ||
| 52 | int cx231xx_ir_init(struct cx231xx *dev) | |
| 53 | { | |
| 9ab66912 | 54 | struct i2c_board_info info; |
| 9ab66912 MCC |
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 */ | |
| 29e3ec19 | 60 | if (!cx231xx_boards[dev->model].rc_map_name) |
| 9ab66912 MCC |
61 | return -ENODEV; |
| 62 | ||
| 9ab66912 MCC |
63 | request_module("ir-kbd-i2c"); |
| 64 | ||
| 65 | memset(&info, 0, sizeof(struct i2c_board_info)); | |
| 141bb0dc MCC |
66 | memset(&dev->init_data, 0, sizeof(dev->init_data)); |
| 67 | dev->init_data.rc_dev = rc_allocate_device(); | |
| 68 | if (!dev->init_data.rc_dev) | |
| 69 | return -ENOMEM; | |
| 9ab66912 | 70 | |
| 141bb0dc | 71 | dev->init_data.name = cx231xx_boards[dev->model].name; |
| 9ab66912 MCC |
72 | |
| 73 | strlcpy(info.type, "ir_video", I2C_NAME_SIZE); | |
| 141bb0dc | 74 | info.platform_data = &dev->init_data; |
| 9ab66912 MCC |
75 | |
| 76 | /* | |
| 77 | * Board-dependent values | |
| 78 | * | |
| 79 | * For now, there's just one type of hardware design using | |
| 80 | * an i2c device. | |
| 81 | */ | |
| 141bb0dc | 82 | dev->init_data.get_key = get_key_isdbt; |
| 29e3ec19 | 83 | dev->init_data.ir_codes = cx231xx_boards[dev->model].rc_map_name; |
| 9ab66912 | 84 | /* The i2c micro-controller only outputs the cmd part of NEC protocol */ |
| 141bb0dc MCC |
85 | dev->init_data.rc_dev->scanmask = 0xff; |
| 86 | dev->init_data.rc_dev->driver_name = "cx231xx"; | |
| 52b66144 | 87 | dev->init_data.type = RC_TYPE_NEC; |
| 9ab66912 MCC |
88 | info.addr = 0x30; |
| 89 | ||
| 9ab66912 MCC |
90 | /* Load and bind ir-kbd-i2c */ |
| 91 | ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master; | |
| 141bb0dc MCC |
92 | dev_dbg(&dev->udev->dev, "Trying to bind ir at bus %d, addr 0x%02x\n", |
| 93 | ir_i2c_bus, info.addr); | |
| 9ab66912 MCC |
94 | i2c_new_device(&dev->i2c_bus[ir_i2c_bus].i2c_adap, &info); |
| 95 | ||
| 141bb0dc | 96 | return 0; |
| 9ab66912 MCC |
97 | } |
| 98 | ||
| 99 | void cx231xx_ir_exit(struct cx231xx *dev) | |
| 100 | { | |
| 9ab66912 | 101 | } |