X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/7ec88f88f4c65a22b3b7e32ef87cb42dcb32a6fb..c5552ad03973839d83d32d7108f20c00f192633b:/target/linux/generic-2.6/files/drivers/input/misc/gpio_buttons.c diff --git a/target/linux/generic-2.6/files/drivers/input/misc/gpio_buttons.c b/target/linux/generic-2.6/files/drivers/input/misc/gpio_buttons.c deleted file mode 100644 index eb0e30161..000000000 --- a/target/linux/generic-2.6/files/drivers/input/misc/gpio_buttons.c +++ /dev/null @@ -1,216 +0,0 @@ -/* - * Driver for buttons on GPIO lines not capable of generating interrupts - * - * Copyright (C) 2007-2010 Gabor Juhos - * Copyright (C) 2010 Nuno Goncalves - * - * This file was based on: /drivers/input/misc/cobalt_btns.c - * Copyright (C) 2007 Yoichi Yuasa - * - * also was based on: /drivers/input/keyboard/gpio_keys.c - * Copyright 2005 Phil Blundell - * - * 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. - * - */ - -#include -#include -#include -#include - -#include -#include -#include -#include - -#include - -#include - -#define DRV_NAME "gpio-buttons" -#define DRV_VERSION "0.1.2" -#define PFX DRV_NAME ": " - -struct gpio_button_data { - int last_state; - int count; -}; - -struct gpio_buttons_dev { - struct input_polled_dev *poll_dev; - struct gpio_buttons_platform_data *pdata; - struct gpio_button_data *data; -}; - -static void gpio_buttons_poll(struct input_polled_dev *dev) -{ - struct gpio_buttons_dev *bdev = dev->private; - struct gpio_buttons_platform_data *pdata = bdev->pdata; - struct input_dev *input = dev->input; - int i; - - for (i = 0; i < bdev->pdata->nbuttons; i++) { - struct gpio_button *button = &pdata->buttons[i]; - unsigned int type = button->type ?: EV_KEY; - int state; - - if (bdev->data[i].count < button->threshold) { - bdev->data[i].count++; - continue; - } - - state = gpio_get_value(button->gpio) ? 1 : 0; - if (state != bdev->data[i].last_state) { - input_event(input, type, button->code, - !!(state ^ button->active_low)); - input_sync(input); - bdev->data[i].count = 0; - bdev->data[i].last_state = state; - } - } -} - -static int __devinit gpio_buttons_probe(struct platform_device *pdev) -{ - struct gpio_buttons_platform_data *pdata = pdev->dev.platform_data; - struct gpio_buttons_dev *bdev; - struct input_polled_dev *poll_dev; - struct input_dev *input; - int error, i; - - if (!pdata) - return -ENXIO; - - bdev = kzalloc(sizeof(struct gpio_buttons_dev) + - sizeof(struct gpio_button_data) * pdata->nbuttons, - GFP_KERNEL); - if (!bdev) { - printk(KERN_ERR DRV_NAME "no memory for device\n"); - return -ENOMEM; - } - - bdev->data = (struct gpio_button_data *) &bdev[1]; - - poll_dev = input_allocate_polled_device(); - if (!poll_dev) { - printk(KERN_ERR DRV_NAME "no memory for polled device\n"); - error = -ENOMEM; - goto err_free_bdev; - } - - poll_dev->private = bdev; - poll_dev->poll = gpio_buttons_poll; - poll_dev->poll_interval = pdata->poll_interval; - - input = poll_dev->input; - - input->evbit[0] = BIT(EV_KEY); - input->name = pdev->name; - input->phys = "gpio-buttons/input0"; - input->dev.parent = &pdev->dev; - - input->id.bustype = BUS_HOST; - input->id.vendor = 0x0001; - input->id.product = 0x0001; - input->id.version = 0x0100; - - for (i = 0; i < pdata->nbuttons; i++) { - struct gpio_button *button = &pdata->buttons[i]; - unsigned int gpio = button->gpio; - unsigned int type = button->type ?: EV_KEY; - - error = gpio_request(gpio, button->desc ? - button->desc : DRV_NAME); - if (error) { - printk(KERN_ERR PFX "unable to claim gpio %u, " - "error %d\n", gpio, error); - goto err_free_gpio; - } - - error = gpio_direction_input(gpio); - if (error) { - printk(KERN_ERR PFX "unable to set direction on " - "gpio %u, error %d\n", gpio, error); - goto err_free_gpio; - } - - input_set_capability(input, type, button->code); - bdev->data[i].last_state = gpio_get_value(button->gpio) ? 1 : 0; - } - - bdev->poll_dev = poll_dev; - bdev->pdata = pdata; - platform_set_drvdata(pdev, bdev); - - error = input_register_polled_device(poll_dev); - if (error) { - printk(KERN_ERR PFX "unable to register polled device, " - "error %d\n", error); - goto err_free_gpio; - } - - return 0; - -err_free_gpio: - for (i = i - 1; i >= 0; i--) - gpio_free(pdata->buttons[i].gpio); - - input_free_polled_device(poll_dev); - -err_free_bdev: - kfree(bdev); - - platform_set_drvdata(pdev, NULL); - return error; -} - -static int __devexit gpio_buttons_remove(struct platform_device *pdev) -{ - struct gpio_buttons_dev *bdev = platform_get_drvdata(pdev); - struct gpio_buttons_platform_data *pdata = bdev->pdata; - int i; - - input_unregister_polled_device(bdev->poll_dev); - - for (i = 0; i < pdata->nbuttons; i++) - gpio_free(pdata->buttons[i].gpio); - - input_free_polled_device(bdev->poll_dev); - - kfree(bdev); - 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) -{ - printk(KERN_INFO DRV_NAME " driver version " DRV_VERSION "\n"); - return platform_driver_register(&gpio_buttons_driver); -} - -static void __exit gpio_buttons_exit(void) -{ - platform_driver_unregister(&gpio_buttons_driver); -} - -module_init(gpio_buttons_init); -module_exit(gpio_buttons_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Gabor Juhos "); -MODULE_VERSION(DRV_VERSION); -MODULE_DESCRIPTION("Polled buttons driver for CPU GPIOs"); -