From 4714eda87748f226833c32400ab60dd6a3b80766 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 13 Dec 2009 16:00:08 -0300 Subject: [PATCH] V4L/DVB (13633): ir-core: create a new class for remote controllers Add sysfs skeleton to export remote controller information via /sys/class/irrcv. For now, the code doesn't do much. It just exports an attribute that is meant to report and control the IR protocol used by the keytable. However, the callbacks for this new attribute weren't set yet. Also, it lacks symlinks to the used event interface. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/IR/Makefile | 2 +- drivers/media/IR/ir-keytable.c | 17 ++++-- drivers/media/IR/ir-sysfs.c | 94 ++++++++++++++++++++++++++++++++++ include/media/ir-core.h | 12 ++++- 4 files changed, 119 insertions(+), 6 deletions(-) create mode 100644 drivers/media/IR/ir-sysfs.c diff --git a/drivers/media/IR/Makefile b/drivers/media/IR/Makefile index df5ddb4bbbf7..171890e7a41d 100644 --- a/drivers/media/IR/Makefile +++ b/drivers/media/IR/Makefile @@ -1,5 +1,5 @@ ir-common-objs := ir-functions.o ir-keymaps.o -ir-core-objs := ir-keytable.o +ir-core-objs := ir-keytable.o ir-sysfs.o obj-$(CONFIG_IR_CORE) += ir-core.o obj-$(CONFIG_VIDEO_IR) += ir-common.o diff --git a/drivers/media/IR/ir-keytable.c b/drivers/media/IR/ir-keytable.c index b521ed9d6e2e..8097561ec66f 100644 --- a/drivers/media/IR/ir-keytable.c +++ b/drivers/media/IR/ir-keytable.c @@ -447,12 +447,21 @@ int ir_input_register(struct input_dev *input_dev, input_set_drvdata(input_dev, ir_dev); rc = input_register_device(input_dev); + if (rc < 0) + goto err; + + rc = ir_register_class(input_dev); if (rc < 0) { - kfree(rc_tab->scan); - kfree(ir_dev); - input_set_drvdata(input_dev, NULL); + input_unregister_device(input_dev); + goto err; } + return 0; + +err: + kfree(rc_tab->scan); + kfree(ir_dev); + input_set_drvdata(input_dev, NULL); return rc; } EXPORT_SYMBOL_GPL(ir_input_register); @@ -472,6 +481,8 @@ void ir_input_unregister(struct input_dev *dev) kfree(rc_tab->scan); rc_tab->scan = NULL; + ir_unregister_class(dev); + kfree(ir_dev); input_unregister_device(dev); } diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c new file mode 100644 index 000000000000..3c601421632b --- /dev/null +++ b/drivers/media/IR/ir-sysfs.c @@ -0,0 +1,94 @@ +/* ir-register.c - handle IR scancode->keycode tables + * + * Copyright (C) 2009 by Mauro Carvalho Chehab + * + * 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 of the License. + * + * 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 +#include +#include + +#define IRRCV_NUM_DEVICES 256 + +unsigned long ir_core_dev_number; + +static struct class *ir_input_class; + +static DEVICE_ATTR(ir_protocol, S_IRUGO | S_IWUSR, NULL, NULL); + +static struct attribute *ir_dev_attrs[] = { + &dev_attr_ir_protocol.attr, +}; + +int ir_register_class(struct input_dev *input_dev) +{ + int rc; + struct kobject *kobj; + + struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); + int devno = find_first_zero_bit(&ir_core_dev_number, + IRRCV_NUM_DEVICES); + + if (unlikely(devno < 0)) + return devno; + + ir_dev->attr.attrs = ir_dev_attrs; + ir_dev->class_dev = device_create(ir_input_class, NULL, + input_dev->dev.devt, ir_dev, + "irrcv%d", devno); + kobj = &ir_dev->class_dev->kobj; + + printk(KERN_WARNING "Creating IR device %s\n", kobject_name(kobj)); + rc = sysfs_create_group(kobj, &ir_dev->attr); + if (unlikely(rc < 0)) { + device_destroy(ir_input_class, input_dev->dev.devt); + return -ENOMEM; + } + + ir_dev->devno = devno; + set_bit(devno, &ir_core_dev_number); + + return 0; +}; + +void ir_unregister_class(struct input_dev *input_dev) +{ + struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); + struct kobject *kobj; + + clear_bit(ir_dev->devno, &ir_core_dev_number); + + kobj = &ir_dev->class_dev->kobj; + + sysfs_remove_group(kobj, &ir_dev->attr); + device_destroy(ir_input_class, input_dev->dev.devt); + + kfree(ir_dev->attr.name); +} + +static int __init ir_core_init(void) +{ + ir_input_class = class_create(THIS_MODULE, "irrcv"); + if (IS_ERR(ir_input_class)) { + printk(KERN_ERR "ir_core: unable to register irrcv class\n"); + return PTR_ERR(ir_input_class); + } + + return 0; +} + +static void __exit ir_core_exit(void) +{ + class_destroy(ir_input_class); +} + +module_init(ir_core_init); +module_exit(ir_core_exit); diff --git a/include/media/ir-core.h b/include/media/ir-core.h index 299d201e1339..a5a3bda354de 100644 --- a/include/media/ir-core.h +++ b/include/media/ir-core.h @@ -42,8 +42,11 @@ struct ir_scancode_table { }; struct ir_input_dev { - struct input_dev *dev; - struct ir_scancode_table rc_tab; + struct input_dev *dev; /* Input device*/ + struct ir_scancode_table rc_tab; /* scan/key table */ + unsigned long devno; /* device number */ + struct attribute_group attr; /* IR attributes */ + struct device *class_dev; /* virtual class dev */ }; /* Routines from ir-keytable.c */ @@ -59,4 +62,9 @@ int ir_input_register(struct input_dev *dev, struct ir_scancode_table *ir_codes); void ir_input_unregister(struct input_dev *input_dev); +/* Routines from ir-sysfs.c */ + +int ir_register_class(struct input_dev *input_dev); +void ir_unregister_class(struct input_dev *input_dev); + #endif -- GitLab