Input: add driver for MIPS Cobalt back panel buttons (bebb8a2b) · Commits · e / devices / android_kernel_teracube_2e

drivers/input/misc/Kconfig

+10 −1

Original line number	Diff line number	Diff line
		@@ -40,6 +40,15 @@ config INPUT_M68K_BEEP
		tristate "M68k Beeper support"
		depends on M68K

		config INPUT_COBALT_BTNS
		tristate "Cobalt button interface"
		depends on MIPS_COBALT
		help
		Say Y here if you want to support MIPS Cobalt button interface.

		To compile this driver as a module, choose M here: the
		module will be called cobalt_btns.

		config INPUT_WISTRON_BTNS
		tristate "x86 Wistron laptop button interface"
		depends on X86 && !X86_64

drivers/input/misc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@ obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o
		obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o
		obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
		obj-$(CONFIG_INPUT_UINPUT) += uinput.o
		obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
		obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
		obj-$(CONFIG_INPUT_ATLAS_BTNS) += atlas_btns.o
		obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o

drivers/input/misc/cobalt_btns.c

0 → 100644

+209 −0

Original line number	Diff line number	Diff line
		/*
		* Cobalt button interface driver.
		*
		* Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
		*
		* 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/init.h>
		#include <linux/input.h>
		#include <linux/ioport.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/jiffies.h>
		#include <linux/timer.h>

		#define BUTTONS_POLL_INTERVAL 30 /* msec */
		#define BUTTONS_COUNT_THRESHOLD 3
		#define BUTTONS_STATUS_MASK 0xfe000000

		struct buttons_dev {
		struct input_dev *input;
		void __iomem *reg;
		};

		struct buttons_map {
		uint32_t mask;
		int keycode;
		int count;
		};

		static struct buttons_map buttons_map[] = {
		{ 0x02000000, KEY_RESTART, },
		{ 0x04000000, KEY_LEFT, },
		{ 0x08000000, KEY_UP, },
		{ 0x10000000, KEY_DOWN, },
		{ 0x20000000, KEY_RIGHT, },
		{ 0x40000000, KEY_ENTER, },
		{ 0x80000000, KEY_SELECT, },
		};

		static struct resource cobalt_buttons_resource __initdata = {
		.start = 0x1d000000,
		.end = 0x1d000003,
		.flags = IORESOURCE_MEM,
		};

		static struct platform_device *cobalt_buttons_device;

		static struct timer_list buttons_timer;

		static void handle_buttons(unsigned long data)
		{
		struct buttons_map *button = buttons_map;
		struct buttons_dev *bdev;
		uint32_t status;
		int i;

		bdev = (struct buttons_dev *)data;
		status = readl(bdev->reg);
		status = ~status & BUTTONS_STATUS_MASK;

		for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
		if (status & button->mask) {
		button->count++;
		} else {
		if (button->count >= BUTTONS_COUNT_THRESHOLD) {
		input_report_key(bdev->input, button->keycode, 0);
		input_sync(bdev->input);
		}
		button->count = 0;
		}

		if (button->count == BUTTONS_COUNT_THRESHOLD) {
		input_report_key(bdev->input, button->keycode, 1);
		input_sync(bdev->input);
		}

		button++;
		}

		mod_timer(&buttons_timer, jiffies + msecs_to_jiffies(BUTTONS_POLL_INTERVAL));
		}

		static int cobalt_buttons_open(struct input_dev *dev)
		{
		mod_timer(&buttons_timer, jiffies + msecs_to_jiffies(BUTTONS_POLL_INTERVAL));

		return 0;
		}

		static void cobalt_buttons_close(struct input_dev *dev)
		{
		del_timer_sync(&buttons_timer);
		}

		static int __devinit cobalt_buttons_probe(struct platform_device *pdev)
		{
		struct buttons_dev *bdev;
		struct input_dev *input;
		struct resource *res;
		int error, i;

		bdev = kzalloc(sizeof(struct buttons_dev), GFP_KERNEL);
		input = input_allocate_device();
		if (!bdev \|\| !input) {
		error = -ENOMEM;
		goto err_free_mem;
		}

		input->name = "Cobalt buttons";
		input->phys = "cobalt/input0";
		input->id.bustype = BUS_HOST;
		input->cdev.dev = &pdev->dev;
		input->open = cobalt_buttons_open;
		input->close = cobalt_buttons_close;

		input->evbit[0] = BIT(EV_KEY);
		for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
		set_bit(buttons_map[i].keycode, input->keybit);
		buttons_map[i].count = 0;
		}

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res) {
		error = -EBUSY;
		goto err_free_mem;
		}

		bdev->input = input;
		bdev->reg = ioremap(res->start, res->end - res->start + 1);
		dev_set_drvdata(&pdev->dev, bdev);

		setup_timer(&buttons_timer, handle_buttons, (unsigned long)bdev);

		error = input_register_device(input);
		if (error)
		goto err_iounmap;

		return 0;

		err_iounmap:
		iounmap(bdev->reg);
		err_free_mem:
		input_free_device(input);
		kfree(bdev);
		dev_set_drvdata(&pdev->dev, NULL);
		return error;
		}

		static int __devexit cobalt_buttons_remove(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct buttons_dev *bdev = dev_get_drvdata(dev);

		input_unregister_device(bdev->input);
		iounmap(bdev->reg);
		kfree(bdev);
		dev_set_drvdata(dev, NULL);

		return 0;
		}

		static struct platform_driver cobalt_buttons_driver = {
		.probe = cobalt_buttons_probe,
		.remove = __devexit_p(cobalt_buttons_remove),
		.driver = {
		.name = "Cobalt buttons",
		.owner = THIS_MODULE,
		},
		};

		static int __init cobalt_buttons_init(void)
		{
		int retval;

		cobalt_buttons_device = platform_device_register_simple("Cobalt buttons", -1,
		&cobalt_buttons_resource, 1);
		if (IS_ERR(cobalt_buttons_device)) {
		retval = PTR_ERR(cobalt_buttons_device);
		return retval;
		}

		retval = platform_driver_register(&cobalt_buttons_driver);
		if (retval < 0)
		platform_device_unregister(cobalt_buttons_device);

		return retval;
		}

		static void __exit cobalt_buttons_exit(void)
		{
		platform_driver_unregister(&cobalt_buttons_driver);
		platform_device_unregister(cobalt_buttons_device);
		}

		module_init(cobalt_buttons_init);
		module_exit(cobalt_buttons_exit);