c003ab1bed
The RC_TYPE_* defines are currently used both where a single protocol is expected and where a bitmap of protocols is expected. Functions like rc_keydown() and functions which add/remove entries to the keytable want a single protocol. Future userspace APIs would also benefit from numeric protocols (rather than bitmap ones). Keytables are smaller if they can use a small(ish) integer rather than a bitmap. Other functions or struct members (e.g. allowed_protos, enabled_protocols, etc) accept multiple protocols and need a bitmap. Using different types reduces the risk of programmer error. Using a protocol enum whereever possible also makes for a more future-proof user-space API as we don't need to worry about a sufficient number of bits being available (e.g. in structs used for ioctl() calls). The use of both a number and a corresponding bit is dalso one in e.g. the input subsystem as well (see all the references to set/clear bit when changing keytables for example). This patch separate the different usages in preparation for upcoming patches. Where a single protocol is expected, enum rc_type is used; where one or more protocol(s) are expected, something like u64 is used. The patch has been rewritten so that the format of the sysfs "protocols" file is no longer altered (at the loss of some detail). The file itself should probably be deprecated in the future though. Signed-off-by: David Härdeman <david@hardeman.nu> Cc: Andy Walls <awalls@md.metrocast.net> Cc: Maxim Levitsky <maximlevitsky@gmail.com> Cc: Antti Palosaari <crope@iki.fi> Cc: Mike Isely <isely@pobox.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
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* cx231xx IR glue driver
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*
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* Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* Polaris (cx231xx) has its support for IR's with a design close to MCE.
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* however, a few designs are using an external I2C chip for IR, instead
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* of using the one provided by the chip.
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* This driver provides support for those extra devices
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include "cx231xx.h"
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#include <linux/usb.h>
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#include <linux/slab.h>
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#define MODULE_NAME "cx231xx-input"
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static int get_key_isdbt(struct IR_i2c *ir, u32 *ir_key,
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u32 *ir_raw)
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{
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int rc;
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u8 cmd, scancode;
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dev_dbg(&ir->rc->input_dev->dev, "%s\n", __func__);
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/* poll IR chip */
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rc = i2c_master_recv(ir->c, &cmd, 1);
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if (rc < 0)
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return rc;
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if (rc != 1)
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return -EIO;
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/* it seems that 0xFE indicates that a button is still hold
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down, while 0xff indicates that no button is hold
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down. 0xfe sequences are sometimes interrupted by 0xFF */
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if (cmd == 0xff)
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return 0;
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scancode =
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((cmd & 0x01) ? 0x80 : 0) |
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((cmd & 0x02) ? 0x40 : 0) |
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((cmd & 0x04) ? 0x20 : 0) |
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((cmd & 0x08) ? 0x10 : 0) |
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((cmd & 0x10) ? 0x08 : 0) |
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((cmd & 0x20) ? 0x04 : 0) |
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((cmd & 0x40) ? 0x02 : 0) |
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((cmd & 0x80) ? 0x01 : 0);
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dev_dbg(&ir->rc->input_dev->dev, "cmd %02x, scan = %02x\n",
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cmd, scancode);
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*ir_key = scancode;
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*ir_raw = scancode;
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return 1;
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}
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int cx231xx_ir_init(struct cx231xx *dev)
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{
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struct i2c_board_info info;
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u8 ir_i2c_bus;
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dev_dbg(&dev->udev->dev, "%s\n", __func__);
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/* Only initialize if a rc keycode map is defined */
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if (!cx231xx_boards[dev->model].rc_map_name)
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return -ENODEV;
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request_module("ir-kbd-i2c");
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memset(&info, 0, sizeof(struct i2c_board_info));
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memset(&dev->init_data, 0, sizeof(dev->init_data));
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dev->init_data.rc_dev = rc_allocate_device();
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if (!dev->init_data.rc_dev)
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return -ENOMEM;
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dev->init_data.name = cx231xx_boards[dev->model].name;
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strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
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info.platform_data = &dev->init_data;
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/*
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* Board-dependent values
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*
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* For now, there's just one type of hardware design using
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* an i2c device.
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*/
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dev->init_data.get_key = get_key_isdbt;
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dev->init_data.ir_codes = cx231xx_boards[dev->model].rc_map_name;
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/* The i2c micro-controller only outputs the cmd part of NEC protocol */
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dev->init_data.rc_dev->scanmask = 0xff;
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dev->init_data.rc_dev->driver_name = "cx231xx";
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dev->init_data.type = RC_BIT_NEC;
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info.addr = 0x30;
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/* Load and bind ir-kbd-i2c */
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ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master;
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dev_dbg(&dev->udev->dev, "Trying to bind ir at bus %d, addr 0x%02x\n",
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ir_i2c_bus, info.addr);
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dev->ir_i2c_client = i2c_new_device(&dev->i2c_bus[ir_i2c_bus].i2c_adap, &info);
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return 0;
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}
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void cx231xx_ir_exit(struct cx231xx *dev)
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{
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if (dev->ir_i2c_client)
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i2c_unregister_device(dev->ir_i2c_client);
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dev->ir_i2c_client = NULL;
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}
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