cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/misc/cobalt_btns.c

/*
 *  Cobalt button interface driver.
 *
 *  Copyright (C) 2007-2008  Yoichi Yuasa <yuasa@linux-mips.org>
 *
 *  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; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include <linux/input-polldev.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>


#define BUTTONS_POLL_INTERVAL	30	
/* msec */

#define BUTTONS_COUNT_THRESHOLD	3

#define BUTTONS_STATUS_MASK	0xfe000000


static const unsigned short cobalt_map[] = {
	KEY_RESERVED,
	KEY_RESTART,
	KEY_LEFT,
	KEY_UP,
	KEY_DOWN,
	KEY_RIGHT,
	KEY_ENTER,
	KEY_SELECT
};


struct buttons_dev {
	
struct input_polled_dev *poll_dev;
	
unsigned short keymap[ARRAY_SIZE(cobalt_map)];
	
int count[ARRAY_SIZE(cobalt_map)];
	
void __iomem *reg;
};


static void handle_buttons(struct input_polled_dev *dev) { struct buttons_dev *bdev = dev->private; struct input_dev *input = dev->input; uint32_t status; int i; status = ~readl(bdev->reg) >> 24; for (i = 0; i < ARRAY_SIZE(bdev->keymap); i++) { if (status & (1U << i)) { if (++bdev->count[i] == BUTTONS_COUNT_THRESHOLD) { input_event(input, EV_MSC, MSC_SCAN, i); input_report_key(input, bdev->keymap[i], 1); input_sync(input); } } else { if (bdev->count[i] >= BUTTONS_COUNT_THRESHOLD) { input_event(input, EV_MSC, MSC_SCAN, i); input_report_key(input, bdev->keymap[i], 0); input_sync(input); } bdev->count[i] = 0; } } }

Contributors

PersonTokensPropCommitsCommitProp
Yoichi Yuasa9553.37%250.00%
Dmitry Torokhov8346.63%250.00%
Total178100.00%4100.00%


static int cobalt_buttons_probe(struct platform_device *pdev) { struct buttons_dev *bdev; struct input_polled_dev *poll_dev; struct input_dev *input; struct resource *res; int error, i; bdev = kzalloc(sizeof(struct buttons_dev), GFP_KERNEL); poll_dev = input_allocate_polled_device(); if (!bdev || !poll_dev) { error = -ENOMEM; goto err_free_mem; } memcpy(bdev->keymap, cobalt_map, sizeof(bdev->keymap)); poll_dev->private = bdev; poll_dev->poll = handle_buttons; poll_dev->poll_interval = BUTTONS_POLL_INTERVAL; input = poll_dev->input; input->name = "Cobalt buttons"; input->phys = "cobalt/input0"; input->id.bustype = BUS_HOST; input->dev.parent = &pdev->dev; input->keycode = bdev->keymap; input->keycodemax = ARRAY_SIZE(bdev->keymap); input->keycodesize = sizeof(unsigned short); input_set_capability(input, EV_MSC, MSC_SCAN); __set_bit(EV_KEY, input->evbit); for (i = 0; i < ARRAY_SIZE(cobalt_map); i++) __set_bit(bdev->keymap[i], input->keybit); __clear_bit(KEY_RESERVED, input->keybit); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { error = -EBUSY; goto err_free_mem; } bdev->poll_dev = poll_dev; bdev->reg = ioremap(res->start, resource_size(res)); dev_set_drvdata(&pdev->dev, bdev); error = input_register_polled_device(poll_dev); if (error) goto err_iounmap; return 0; err_iounmap: iounmap(bdev->reg); err_free_mem: input_free_polled_device(poll_dev); kfree(bdev); return error; }

Contributors

PersonTokensPropCommitsCommitProp
Yoichi Yuasa22367.99%240.00%
Dmitry Torokhov10231.10%240.00%
Julia Lawall30.91%120.00%
Total328100.00%5100.00%


static int cobalt_buttons_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct buttons_dev *bdev = dev_get_drvdata(dev); input_unregister_polled_device(bdev->poll_dev); input_free_polled_device(bdev->poll_dev); iounmap(bdev->reg); kfree(bdev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Yoichi Yuasa5185.00%150.00%
Dmitry Torokhov915.00%150.00%
Total60100.00%2100.00%

MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>"); MODULE_DESCRIPTION("Cobalt button interface driver"); MODULE_LICENSE("GPL"); /* work with hotplug and coldplug */ MODULE_ALIAS("platform:Cobalt buttons"); static struct platform_driver cobalt_buttons_driver = { .probe = cobalt_buttons_probe, .remove = cobalt_buttons_remove, .driver = { .name = "Cobalt buttons", }, }; module_platform_driver(cobalt_buttons_driver);

Overall Contributors

PersonTokensPropCommitsCommitProp
Yoichi Yuasa44462.80%330.00%
Dmitry Torokhov23533.24%220.00%
Martin Michlmayr141.98%110.00%
Kay Sievers60.85%110.00%
Tejun Heo30.42%110.00%
Julia Lawall30.42%110.00%
JJ Ding20.28%110.00%
Total707100.00%10100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.