120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/* ir-register.c - handle IR scancode->keycode tables
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*
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* Copyright (C) 2009 by Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License.
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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
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* GNU General Public License for more details.
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*/
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#include <linux/input.h>
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#include <linux/device.h>
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#include <media/ir-core.h>
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#define IRRCV_NUM_DEVICES 256
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unsigned long ir_core_dev_number;
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static struct class *ir_input_class;
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static ssize_t show_protocol(struct device *d,
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struct device_attribute *mattr, char *buf)
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{
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char *s;
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struct ir_input_dev *ir_dev = dev_get_drvdata(d);
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enum ir_type ir_type = ir_dev->rc_tab.ir_type;
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IR_dprintk(1, "Current protocol is %ld\n", ir_type);
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/* FIXME: doesn't support multiple protocols at the same time */
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if (ir_type == IR_TYPE_UNKNOWN)
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s = "Unknown";
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else if (ir_type == IR_TYPE_RC5)
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s = "RC-5";
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else if (ir_type == IR_TYPE_PD)
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s = "Pulse/distance";
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else if (ir_type == IR_TYPE_NEC)
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s = "NEC";
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else
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s = "Other";
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return sprintf(buf, "%s\n", s);
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}
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static DEVICE_ATTR(current_protocol, S_IRUGO | S_IWUSR,
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show_protocol, NULL);
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static struct attribute *ir_dev_attrs[] = {
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&dev_attr_current_protocol.attr,
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};
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int ir_register_class(struct input_dev *input_dev)
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{
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int rc;
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struct kobject *kobj;
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struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
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int devno = find_first_zero_bit(&ir_core_dev_number,
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IRRCV_NUM_DEVICES);
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if (unlikely(devno < 0))
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return devno;
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ir_dev->attr.attrs = ir_dev_attrs;
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ir_dev->class_dev = device_create(ir_input_class, NULL,
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input_dev->dev.devt, ir_dev,
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"irrcv%d", devno);
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kobj = &ir_dev->class_dev->kobj;
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printk(KERN_WARNING "Creating IR device %s\n", kobject_name(kobj));
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rc = sysfs_create_group(kobj, &ir_dev->attr);
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if (unlikely(rc < 0)) {
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device_destroy(ir_input_class, input_dev->dev.devt);
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return -ENOMEM;
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}
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ir_dev->devno = devno;
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set_bit(devno, &ir_core_dev_number);
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return 0;
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};
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void ir_unregister_class(struct input_dev *input_dev)
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{
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struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
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struct kobject *kobj;
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clear_bit(ir_dev->devno, &ir_core_dev_number);
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kobj = &ir_dev->class_dev->kobj;
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sysfs_remove_group(kobj, &ir_dev->attr);
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device_destroy(ir_input_class, input_dev->dev.devt);
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kfree(ir_dev->attr.name);
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}
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static int __init ir_core_init(void)
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{
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ir_input_class = class_create(THIS_MODULE, "irrcv");
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if (IS_ERR(ir_input_class)) {
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printk(KERN_ERR "ir_core: unable to register irrcv class\n");
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return PTR_ERR(ir_input_class);
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}
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return 0;
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}
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static void __exit ir_core_exit(void)
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{
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class_destroy(ir_input_class);
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}
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module_init(ir_core_init);
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module_exit(ir_core_exit);
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