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336fea9229
Unfortunately, on devices that have multiple interfaces, udev->dev points to the parent device (usb) instead of the cx231xx specific one. Due to that the logs don't look too nice, as they'll print messages as if they were produced by USB core: usb-1-2: New device Conexant Corporation Polaris AV Capturb @ 480 Mbps (1554:5010) with 7 interfaces Instead of using the name of the parent device, let's use the name of the first cx231xx interface for all cx231xx sub-modules. With this path, the logs will be nicer: cx231xx 1-2:1.1: New device Conexant Corporation Polaris AV Capturb @ 480 Mbps (1554:5010) with 7 interfaces Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
/*
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* cx231xx IR glue driver
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*
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* Copyright (C) 2010 Mauro Carvalho Chehab
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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/slab.h>
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#include <linux/bitrev.h>
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#define MODULE_NAME "cx231xx-input"
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static int get_key_isdbt(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *pscancode, u8 *toggle)
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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 = bitrev8(cmd);
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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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*protocol = RC_TYPE_OTHER;
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*pscancode = scancode;
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*toggle = 0;
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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->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->scancode_mask = 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->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(
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cx231xx_get_i2c_adap(dev, ir_i2c_bus), &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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