mirror of https://github.com/hak5/openwrt-owl.git
Felix Fietkau
parent
2d61e4c580
commit
be2adce709
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@ -1,35 +0,0 @@
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/*
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* Definitions for the GPIO buttons interface driver
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*
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* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
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*
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* This file was based on: /include/linux/gpio_keys.h
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* The original gpio_keys.h seems not to have a license.
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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 version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef _GPIO_BUTTONS_H_
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#define _GPIO_BUTTONS_H_
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struct gpio_button {
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int gpio; /* GPIO line number */
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int active_low;
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char *desc; /* button description */
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int type; /* input event type (EV_KEY, EV_SW) */
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int code; /* input event code (KEY_*, SW_*) */
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int count;
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int threshold; /* count threshold */
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};
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struct gpio_buttons_platform_data {
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struct gpio_button *buttons;
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int nbuttons; /* number of buttons */
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int poll_interval; /* polling interval */
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};
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#endif /* _GPIO_BUTTONS_H_ */
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@ -1,11 +0,0 @@
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#ifndef _GPIODEV_H__
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#define _GPIODEV_H__
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#define IOC_GPIODEV_MAGIC 'B'
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#define GPIO_GET _IO(IOC_GPIODEV_MAGIC, 10)
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#define GPIO_SET _IO(IOC_GPIODEV_MAGIC, 11)
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#define GPIO_CLEAR _IO(IOC_GPIODEV_MAGIC, 12)
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#define GPIO_DIR_IN _IO(IOC_GPIODEV_MAGIC, 13)
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#define GPIO_DIR_OUT _IO(IOC_GPIODEV_MAGIC, 14)
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#endif
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@ -1,201 +0,0 @@
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/*
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* character device wrapper for generic gpio layer
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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; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
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*
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* Feedback, Bugs... blogic@openwrt.org
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*
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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#include <asm/atomic.h>
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#include <linux/init.h>
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#include <linux/genhd.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/gpio_dev.h>
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#define DRVNAME "gpiodev"
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#define DEVNAME "gpio"
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static int dev_major;
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static unsigned int gpio_access_mask;
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static struct class *gpiodev_class;
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/* Counter is 1, if the device is not opened and zero (or less) if opened. */
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static atomic_t gpio_open_cnt = ATOMIC_INIT(1);
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static int
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gpio_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
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{
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int retval = 0;
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if (((1 << arg) & gpio_access_mask) != (1 << arg))
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{
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retval = -EINVAL;
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goto out;
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}
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switch (cmd)
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{
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case GPIO_GET:
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retval = gpio_get_value(arg);
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break;
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case GPIO_SET:
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gpio_set_value(arg, 1);
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break;
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case GPIO_CLEAR:
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gpio_set_value(arg, 0);
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break;
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case GPIO_DIR_IN:
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gpio_direction_input(arg);
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break;
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case GPIO_DIR_OUT:
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gpio_direction_output(arg, 0);
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break;
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default:
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retval = -EINVAL;
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break;
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}
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out:
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return retval;
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}
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static int
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gpio_open(struct inode *inode, struct file *file)
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{
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int result = 0;
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unsigned int dev_minor = MINOR(inode->i_rdev);
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if (dev_minor != 0)
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{
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printk(KERN_ERR DRVNAME ": trying to access unknown minor device -> %d\n", dev_minor);
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result = -ENODEV;
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goto out;
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}
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/* FIXME: We should really allow multiple applications to open the device
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* at the same time, as long as the apps access different IO pins.
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* The generic gpio-registration functions can be used for that.
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* Two new IOCTLs have to be introduced for that. Need to check userspace
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* compatibility first. --mb */
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if (!atomic_dec_and_test(&gpio_open_cnt)) {
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atomic_inc(&gpio_open_cnt);
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printk(KERN_ERR DRVNAME ": Device with minor ID %d already in use\n", dev_minor);
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result = -EBUSY;
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goto out;
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}
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out:
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return result;
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}
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static int
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gpio_close(struct inode * inode, struct file * file)
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{
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smp_mb__before_atomic_inc();
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atomic_inc(&gpio_open_cnt);
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return 0;
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}
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struct file_operations gpio_fops = {
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ioctl: gpio_ioctl,
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open: gpio_open,
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release: gpio_close
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};
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static int
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gpio_probe(struct platform_device *dev)
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{
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int result = 0;
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dev_major = register_chrdev(0, DEVNAME, &gpio_fops);
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if (!dev_major)
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{
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printk(KERN_ERR DRVNAME ": Error whilst opening %s \n", DEVNAME);
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result = -ENODEV;
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goto out;
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}
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gpiodev_class = class_create(THIS_MODULE, DRVNAME);
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device_create(gpiodev_class, NULL, MKDEV(dev_major, 0), dev, DEVNAME);
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printk(KERN_INFO DRVNAME ": gpio device registered with major %d\n", dev_major);
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if (dev->num_resources != 1)
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{
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printk(KERN_ERR DRVNAME ": device may only have 1 resource\n");
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result = -ENODEV;
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goto out;
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}
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gpio_access_mask = dev->resource[0].start;
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printk(KERN_INFO DRVNAME ": gpio platform device registered with access mask %08X\n", gpio_access_mask);
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out:
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return result;
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}
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static int
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gpio_remove(struct platform_device *dev)
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{
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unregister_chrdev(dev_major, DEVNAME);
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return 0;
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}
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static struct
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platform_driver gpio_driver = {
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.probe = gpio_probe,
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.remove = gpio_remove,
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.driver = {
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.name = "GPIODEV",
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.owner = THIS_MODULE,
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},
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};
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static int __init
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gpio_mod_init(void)
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{
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int ret = platform_driver_register(&gpio_driver);
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if (ret)
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printk(KERN_INFO DRVNAME ": Error registering platfom driver!");
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return ret;
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}
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static void __exit
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gpio_mod_exit(void)
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{
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platform_driver_unregister(&gpio_driver);
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}
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module_init (gpio_mod_init);
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module_exit (gpio_mod_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("John Crispin / OpenWrt");
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MODULE_DESCRIPTION("Character device for for generic gpio api");
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@ -1,209 +0,0 @@
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/*
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* Driver for buttons on GPIO lines not capable of generating interrupts
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*
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* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
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*
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* This file was based on: /drivers/input/misc/cobalt_btns.c
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* Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
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*
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* also was based on: /drivers/input/keyboard/gpio_keys.c
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* Copyright 2005 Phil Blundell
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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 version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/input-polldev.h>
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#include <linux/ioport.h>
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#include <linux/platform_device.h>
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#include <linux/gpio_buttons.h>
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#include <asm/gpio.h>
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#define DRV_NAME "gpio-buttons"
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#define DRV_VERSION "0.1.1"
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#define PFX DRV_NAME ": "
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struct gpio_buttons_dev {
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struct input_polled_dev *poll_dev;
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struct gpio_buttons_platform_data *pdata;
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};
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static void gpio_buttons_poll(struct input_polled_dev *dev)
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{
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struct gpio_buttons_dev *bdev = dev->private;
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struct gpio_buttons_platform_data *pdata = bdev->pdata;
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struct input_dev *input = dev->input;
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int i;
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for (i = 0; i < bdev->pdata->nbuttons; i++) {
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struct gpio_button *button = &pdata->buttons[i];
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unsigned int type = button->type ?: EV_KEY;
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int state;
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state = gpio_get_value(button->gpio) ? 1 : 0;
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state ^= button->active_low;
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if (state) {
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button->count++;
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} else {
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if (button->count >= button->threshold) {
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input_event(input, type, button->code, 1);
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input_sync(input);
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}
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button->count = 0;
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}
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if (button->count == button->threshold) {
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input_event(input, type, button->code, 0);
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input_sync(input);
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}
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}
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}
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static int __devinit gpio_buttons_probe(struct platform_device *pdev)
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{
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struct gpio_buttons_platform_data *pdata = pdev->dev.platform_data;
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struct gpio_buttons_dev *bdev;
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struct input_polled_dev *poll_dev;
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struct input_dev *input;
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int error, i;
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if (!pdata)
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return -ENXIO;
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bdev = kzalloc(sizeof(*bdev), GFP_KERNEL);
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if (!bdev) {
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printk(KERN_ERR DRV_NAME "no memory for device\n");
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return -ENOMEM;
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}
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poll_dev = input_allocate_polled_device();
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if (!poll_dev) {
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printk(KERN_ERR DRV_NAME "no memory for polled device\n");
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error = -ENOMEM;
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goto err_free_bdev;
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}
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poll_dev->private = bdev;
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poll_dev->poll = gpio_buttons_poll;
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poll_dev->poll_interval = pdata->poll_interval;
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input = poll_dev->input;
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input->evbit[0] = BIT(EV_KEY);
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input->name = pdev->name;
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input->phys = "gpio-buttons/input0";
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input->dev.parent = &pdev->dev;
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input->id.bustype = BUS_HOST;
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input->id.vendor = 0x0001;
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input->id.product = 0x0001;
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input->id.version = 0x0100;
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for (i = 0; i < pdata->nbuttons; i++) {
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struct gpio_button *button = &pdata->buttons[i];
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unsigned int gpio = button->gpio;
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unsigned int type = button->type ?: EV_KEY;
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error = gpio_request(gpio, button->desc ?
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button->desc : DRV_NAME);
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if (error) {
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printk(KERN_ERR PFX "unable to claim gpio %u, "
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"error %d\n", gpio, error);
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goto err_free_gpio;
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}
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error = gpio_direction_input(gpio);
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if (error) {
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printk(KERN_ERR PFX "unable to set direction on "
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"gpio %u, error %d\n", gpio, error);
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goto err_free_gpio;
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}
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input_set_capability(input, type, button->code);
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button->count = 0;
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}
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bdev->poll_dev = poll_dev;
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bdev->pdata = pdata;
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platform_set_drvdata(pdev, bdev);
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error = input_register_polled_device(poll_dev);
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if (error) {
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printk(KERN_ERR PFX "unable to register polled device, "
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"error %d\n", error);
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goto err_free_gpio;
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}
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return 0;
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err_free_gpio:
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for (i = i - 1; i >= 0; i--)
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gpio_free(pdata->buttons[i].gpio);
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input_free_polled_device(poll_dev);
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err_free_bdev:
|
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kfree(bdev);
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platform_set_drvdata(pdev, NULL);
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return error;
|
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}
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static int __devexit gpio_buttons_remove(struct platform_device *pdev)
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{
|
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struct gpio_buttons_dev *bdev = platform_get_drvdata(pdev);
|
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struct gpio_buttons_platform_data *pdata = bdev->pdata;
|
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int i;
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input_unregister_polled_device(bdev->poll_dev);
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for (i = 0; i < pdata->nbuttons; i++)
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gpio_free(pdata->buttons[i].gpio);
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input_free_polled_device(bdev->poll_dev);
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|
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kfree(bdev);
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platform_set_drvdata(pdev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver gpio_buttons_driver = {
|
||||
.probe = gpio_buttons_probe,
|
||||
.remove = __devexit_p(gpio_buttons_remove),
|
||||
.driver = {
|
||||
.name = DRV_NAME,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init gpio_buttons_init(void)
|
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{
|
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printk(KERN_INFO DRV_NAME " driver version " DRV_VERSION "\n");
|
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return platform_driver_register(&gpio_buttons_driver);
|
||||
}
|
||||
|
||||
static void __exit gpio_buttons_exit(void)
|
||||
{
|
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platform_driver_unregister(&gpio_buttons_driver);
|
||||
}
|
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|
||||
module_init(gpio_buttons_init);
|
||||
module_exit(gpio_buttons_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
|
||||
MODULE_VERSION(DRV_VERSION);
|
||||
MODULE_DESCRIPTION("Polled buttons driver for CPU GPIOs");
|
||||
|
||||
|
|
@ -1,35 +0,0 @@
|
|||
/*
|
||||
* Definitions for the GPIO buttons interface driver
|
||||
*
|
||||
* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
|
||||
*
|
||||
* This file was based on: /include/linux/gpio_keys.h
|
||||
* The original gpio_keys.h seems not to have a license.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _GPIO_BUTTONS_H_
|
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#define _GPIO_BUTTONS_H_
|
||||
|
||||
struct gpio_button {
|
||||
int gpio; /* GPIO line number */
|
||||
int active_low;
|
||||
char *desc; /* button description */
|
||||
int type; /* input event type (EV_KEY, EV_SW) */
|
||||
int code; /* input event code (KEY_*, SW_*) */
|
||||
int count;
|
||||
int threshold; /* count threshold */
|
||||
};
|
||||
|
||||
struct gpio_buttons_platform_data {
|
||||
struct gpio_button *buttons;
|
||||
int nbuttons; /* number of buttons */
|
||||
int poll_interval; /* polling interval */
|
||||
};
|
||||
|
||||
#endif /* _GPIO_BUTTONS_H_ */
|
||||
|
||||
|
|
@ -1,11 +0,0 @@
|
|||
#ifndef _GPIODEV_H__
|
||||
#define _GPIODEV_H__
|
||||
|
||||
#define IOC_GPIODEV_MAGIC 'B'
|
||||
#define GPIO_GET _IO(IOC_GPIODEV_MAGIC, 10)
|
||||
#define GPIO_SET _IO(IOC_GPIODEV_MAGIC, 11)
|
||||
#define GPIO_CLEAR _IO(IOC_GPIODEV_MAGIC, 12)
|
||||
#define GPIO_DIR_IN _IO(IOC_GPIODEV_MAGIC, 13)
|
||||
#define GPIO_DIR_OUT _IO(IOC_GPIODEV_MAGIC, 14)
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue