diff options
Diffstat (limited to 'drivers/staging/android/switch/switch_class.c')
| -rw-r--r-- | drivers/staging/android/switch/switch_class.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/drivers/staging/android/switch/switch_class.c b/drivers/staging/android/switch/switch_class.c deleted file mode 100644 index 74680446fc66..000000000000 --- a/drivers/staging/android/switch/switch_class.c +++ /dev/null @@ -1,174 +0,0 @@ -/* - * switch_class.c - * - * Copyright (C) 2008 Google, Inc. - * Author: Mike Lockwood <lockwood@android.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * 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 <linux/module.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/device.h> -#include <linux/fs.h> -#include <linux/err.h> -#include "switch.h" - -struct class *switch_class; -static atomic_t device_count; - -static ssize_t state_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct switch_dev *sdev = (struct switch_dev *) - dev_get_drvdata(dev); - - if (sdev->print_state) { - int ret = sdev->print_state(sdev, buf); - if (ret >= 0) - return ret; - } - return sprintf(buf, "%d\n", sdev->state); -} - -static ssize_t name_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct switch_dev *sdev = (struct switch_dev *) - dev_get_drvdata(dev); - - if (sdev->print_name) { - int ret = sdev->print_name(sdev, buf); - if (ret >= 0) - return ret; - } - return sprintf(buf, "%s\n", sdev->name); -} - -static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, state_show, NULL); -static DEVICE_ATTR(name, S_IRUGO | S_IWUSR, name_show, NULL); - -void switch_set_state(struct switch_dev *sdev, int state) -{ - char name_buf[120]; - char state_buf[120]; - char *prop_buf; - char *envp[3]; - int env_offset = 0; - int length; - - if (sdev->state != state) { - sdev->state = state; - - prop_buf = (char *)get_zeroed_page(GFP_KERNEL); - if (prop_buf) { - length = name_show(sdev->dev, NULL, prop_buf); - if (length > 0) { - if (prop_buf[length - 1] == '\n') - prop_buf[length - 1] = 0; - snprintf(name_buf, sizeof(name_buf), - "SWITCH_NAME=%s", prop_buf); - envp[env_offset++] = name_buf; - } - length = state_show(sdev->dev, NULL, prop_buf); - if (length > 0) { - if (prop_buf[length - 1] == '\n') - prop_buf[length - 1] = 0; - snprintf(state_buf, sizeof(state_buf), - "SWITCH_STATE=%s", prop_buf); - envp[env_offset++] = state_buf; - } - envp[env_offset] = NULL; - kobject_uevent_env(&sdev->dev->kobj, KOBJ_CHANGE, envp); - free_page((unsigned long)prop_buf); - } else { - printk(KERN_ERR "out of memory in switch_set_state\n"); - kobject_uevent(&sdev->dev->kobj, KOBJ_CHANGE); - } - } -} -EXPORT_SYMBOL_GPL(switch_set_state); - -static int create_switch_class(void) -{ - if (!switch_class) { - switch_class = class_create(THIS_MODULE, "switch"); - if (IS_ERR(switch_class)) - return PTR_ERR(switch_class); - atomic_set(&device_count, 0); - } - - return 0; -} - -int switch_dev_register(struct switch_dev *sdev) -{ - int ret; - - if (!switch_class) { - ret = create_switch_class(); - if (ret < 0) - return ret; - } - - sdev->index = atomic_inc_return(&device_count); - sdev->dev = device_create(switch_class, NULL, - MKDEV(0, sdev->index), NULL, sdev->name); - if (IS_ERR(sdev->dev)) - return PTR_ERR(sdev->dev); - - ret = device_create_file(sdev->dev, &dev_attr_state); - if (ret < 0) - goto err_create_file_1; - ret = device_create_file(sdev->dev, &dev_attr_name); - if (ret < 0) - goto err_create_file_2; - - dev_set_drvdata(sdev->dev, sdev); - sdev->state = 0; - return 0; - -err_create_file_2: - device_remove_file(sdev->dev, &dev_attr_state); -err_create_file_1: - device_destroy(switch_class, MKDEV(0, sdev->index)); - printk(KERN_ERR "switch: Failed to register driver %s\n", sdev->name); - - return ret; -} -EXPORT_SYMBOL_GPL(switch_dev_register); - -void switch_dev_unregister(struct switch_dev *sdev) -{ - device_remove_file(sdev->dev, &dev_attr_name); - device_remove_file(sdev->dev, &dev_attr_state); - device_destroy(switch_class, MKDEV(0, sdev->index)); - dev_set_drvdata(sdev->dev, NULL); -} -EXPORT_SYMBOL_GPL(switch_dev_unregister); - -static int __init switch_class_init(void) -{ - return create_switch_class(); -} - -static void __exit switch_class_exit(void) -{ - class_destroy(switch_class); -} - -module_init(switch_class_init); -module_exit(switch_class_exit); - -MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>"); -MODULE_DESCRIPTION("Switch class driver"); -MODULE_LICENSE("GPL"); |