diff options
Diffstat (limited to 'target/linux/generic-2.6/files-2.6.30/drivers/input/misc/gpio_buttons.c')
| -rw-r--r-- | target/linux/generic-2.6/files-2.6.30/drivers/input/misc/gpio_buttons.c | 209 |
1 files changed, 0 insertions, 209 deletions
diff --git a/target/linux/generic-2.6/files-2.6.30/drivers/input/misc/gpio_buttons.c b/target/linux/generic-2.6/files-2.6.30/drivers/input/misc/gpio_buttons.c deleted file mode 100644 index 83a8178340..0000000000 --- a/target/linux/generic-2.6/files-2.6.30/drivers/input/misc/gpio_buttons.c +++ /dev/null @@ -1,209 +0,0 @@ -/* - * Driver for buttons on GPIO lines not capable of generating interrupts - * - * Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org> - * - * This file was based on: /drivers/input/misc/cobalt_btns.c - * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> - * - * 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 <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> - -#include <linux/input.h> -#include <linux/input-polldev.h> -#include <linux/ioport.h> -#include <linux/platform_device.h> - -#include <linux/gpio_buttons.h> - -#include <asm/gpio.h> - -#define DRV_NAME "gpio-buttons" -#define DRV_VERSION "0.1.1" -#define PFX DRV_NAME ": " - -struct gpio_buttons_dev { - struct input_polled_dev *poll_dev; - struct gpio_buttons_platform_data *pdata; -}; - -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; - - state = gpio_get_value(button->gpio) ? 1 : 0; - state ^= button->active_low; - - if (state) { - button->count++; - } else { - if (button->count >= button->threshold) { - input_event(input, type, button->code, 1); - input_sync(input); - } - button->count = 0; - } - - if (button->count == button->threshold) { - input_event(input, type, button->code, 0); - input_sync(input); - } - } -} - -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(*bdev), GFP_KERNEL); - if (!bdev) { - printk(KERN_ERR DRV_NAME "no memory for device\n"); - return -ENOMEM; - } - - 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); - button->count = 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 <juhosg at openwrt.org>"); -MODULE_VERSION(DRV_VERSION); -MODULE_DESCRIPTION("Polled buttons driver for CPU GPIOs"); - |