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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | /* * cx231xx IR glue driver * * Copyright (C) 2010 Mauro Carvalho Chehab * * Polaris (cx231xx) has its support for IR's with a design close to MCE. * however, a few designs are using an external I2C chip for IR, instead * of using the one provided by the chip. * This driver provides support for those extra devices * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation version 2. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. */ #include "cx231xx.h" #include <linux/slab.h> #include <linux/bitrev.h> #define MODULE_NAME "cx231xx-input" static int get_key_isdbt(struct IR_i2c *ir, enum rc_proto *protocol, u32 *pscancode, u8 *toggle) { int rc; u8 cmd, scancode; dev_dbg(&ir->rc->dev, "%s\n", __func__); /* poll IR chip */ rc = i2c_master_recv(ir->c, &cmd, 1); if (rc < 0) return rc; if (rc != 1) return -EIO; /* it seems that 0xFE indicates that a button is still hold down, while 0xff indicates that no button is hold down. 0xfe sequences are sometimes interrupted by 0xFF */ if (cmd == 0xff) return 0; scancode = bitrev8(cmd); dev_dbg(&ir->rc->dev, "cmd %02x, scan = %02x\n", cmd, scancode); *protocol = RC_PROTO_OTHER; *pscancode = scancode; *toggle = 0; return 1; } int cx231xx_ir_init(struct cx231xx *dev) { struct i2c_board_info info; u8 ir_i2c_bus; dev_dbg(dev->dev, "%s\n", __func__); /* Only initialize if a rc keycode map is defined */ if (!cx231xx_boards[dev->model].rc_map_name) return -ENODEV; request_module("ir-kbd-i2c"); memset(&info, 0, sizeof(struct i2c_board_info)); memset(&dev->init_data, 0, sizeof(dev->init_data)); dev->init_data.rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE); if (!dev->init_data.rc_dev) return -ENOMEM; dev->init_data.name = cx231xx_boards[dev->model].name; strlcpy(info.type, "ir_video", I2C_NAME_SIZE); info.platform_data = &dev->init_data; /* * Board-dependent values * * For now, there's just one type of hardware design using * an i2c device. */ dev->init_data.get_key = get_key_isdbt; dev->init_data.ir_codes = cx231xx_boards[dev->model].rc_map_name; /* The i2c micro-controller only outputs the cmd part of NEC protocol */ dev->init_data.rc_dev->scancode_mask = 0xff; dev->init_data.rc_dev->driver_name = "cx231xx"; dev->init_data.type = RC_PROTO_BIT_NEC; info.addr = 0x30; /* Load and bind ir-kbd-i2c */ ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master; dev_dbg(dev->dev, "Trying to bind ir at bus %d, addr 0x%02x\n", ir_i2c_bus, info.addr); dev->ir_i2c_client = i2c_new_device( cx231xx_get_i2c_adap(dev, ir_i2c_bus), &info); return 0; } void cx231xx_ir_exit(struct cx231xx *dev) { if (dev->ir_i2c_client) i2c_unregister_device(dev->ir_i2c_client); dev->ir_i2c_client = NULL; } |