blob: 45e14cac4622ba03108bd3b4845f6f77a1beab18 [file] [log] [blame]
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -03001/*
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
27static int get_key_isdbt(struct IR_i2c *ir, u32 *ir_key,
28 u32 *ir_raw)
29{
Mauro Carvalho Chehabe3302892010-12-17 14:22:09 -030030 u8 cmd, scancode;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030031
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -030032 dev_dbg(&ir->rc->input_dev->dev, "%s\n", __func__);
33
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030034 /* 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
Mauro Carvalho Chehabe3302892010-12-17 14:22:09 -030045 scancode =
46 ((cmd & 0x01) ? 0x80 : 0) |
47 ((cmd & 0x02) ? 0x40 : 0) |
48 ((cmd & 0x04) ? 0x20 : 0) |
49 ((cmd & 0x08) ? 0x10 : 0) |
50 ((cmd & 0x10) ? 0x08 : 0) |
51 ((cmd & 0x20) ? 0x04 : 0) |
52 ((cmd & 0x40) ? 0x02 : 0) |
53 ((cmd & 0x80) ? 0x01 : 0);
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030054
Mauro Carvalho Chehabe3302892010-12-17 14:22:09 -030055 dev_dbg(&ir->rc->input_dev->dev, "cmd %02x, scan = %02x\n",
56 cmd, scancode);
57
58 *ir_key = scancode;
59 *ir_raw = scancode;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030060 return 1;
61}
62
63int cx231xx_ir_init(struct cx231xx *dev)
64{
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030065 struct i2c_board_info info;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030066 u8 ir_i2c_bus;
67
68 dev_dbg(&dev->udev->dev, "%s\n", __func__);
69
70 /* Only initialize if a rc keycode map is defined */
Mauro Carvalho Chehab29e3ec12010-11-17 14:12:46 -030071 if (!cx231xx_boards[dev->model].rc_map_name)
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030072 return -ENODEV;
73
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030074 request_module("ir-kbd-i2c");
75
76 memset(&info, 0, sizeof(struct i2c_board_info));
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -030077 memset(&dev->init_data, 0, sizeof(dev->init_data));
78 dev->init_data.rc_dev = rc_allocate_device();
79 if (!dev->init_data.rc_dev)
80 return -ENOMEM;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030081
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -030082 dev->init_data.name = cx231xx_boards[dev->model].name;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030083
84 strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -030085 info.platform_data = &dev->init_data;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030086
87 /*
88 * Board-dependent values
89 *
90 * For now, there's just one type of hardware design using
91 * an i2c device.
92 */
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -030093 dev->init_data.get_key = get_key_isdbt;
Mauro Carvalho Chehab29e3ec12010-11-17 14:12:46 -030094 dev->init_data.ir_codes = cx231xx_boards[dev->model].rc_map_name;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030095 /* The i2c micro-controller only outputs the cmd part of NEC protocol */
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -030096 dev->init_data.rc_dev->scanmask = 0xff;
97 dev->init_data.rc_dev->driver_name = "cx231xx";
Mauro Carvalho Chehab52b66142010-11-17 14:20:52 -030098 dev->init_data.type = RC_TYPE_NEC;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -030099 info.addr = 0x30;
100
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -0300101 /* Load and bind ir-kbd-i2c */
102 ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master;
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -0300103 dev_dbg(&dev->udev->dev, "Trying to bind ir at bus %d, addr 0x%02x\n",
104 ir_i2c_bus, info.addr);
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -0300105 i2c_new_device(&dev->i2c_bus[ir_i2c_bus].i2c_adap, &info);
106
Mauro Carvalho Chehab141bb0d2010-11-11 08:14:16 -0300107 return 0;
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -0300108}
109
110void cx231xx_ir_exit(struct cx231xx *dev)
111{
Mauro Carvalho Chehab9ab66912010-10-23 13:28:33 -0300112}