Input: new driver for SGI O2 volume buttons (3bee2a04) · Commits · e / devices / android_kernel_sony_msm8998

drivers/input/misc/Kconfig

+10 −0

Original line number	Original line	Diff line number	Diff line
	@@ -189,6 +189,16 @@ config INPUT_UINPUT
	To compile this driver as a module, choose M here: the		To compile this driver as a module, choose M here: the
	module will be called uinput.		module will be called uinput.

			config INPUT_SGIO2_BTNS
			tristate "SGI O2 volume button interface"
			depends on SGI_IP32
			select INPUT_POLLDEV
			help
			Say Y here if you want to support SGI O2 volume button interface.

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

	config HP_SDC_RTC		config HP_SDC_RTC
	tristate "HP SDC Real Time Clock"		tristate "HP SDC Real Time Clock"
	depends on GSC \|\| HP300		depends on GSC \|\| HP300

drivers/input/misc/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -19,3 +19,4 @@ obj-$(CONFIG_INPUT_YEALINK) += yealink.o
	obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o		obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
	obj-$(CONFIG_INPUT_UINPUT) += uinput.o		obj-$(CONFIG_INPUT_UINPUT) += uinput.o
	obj-$(CONFIG_INPUT_APANEL) += apanel.o		obj-$(CONFIG_INPUT_APANEL) += apanel.o
			obj-$(CONFIG_INPUT_SGIO2_BTNS) += sgio2_btns.o

drivers/input/misc/sgio2_btns.c

0 → 100644

+156 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* SGI O2 Volume Button interface driver
			*
			* Copyright (C) 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
			*
			* 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-polldev.h>
			#include <linux/ioport.h>
			#include <linux/module.h>
			#include <linux/platform_device.h>

			#include <asm/ip32/mace.h>

			#define BUTTONS_POLL_INTERVAL 30 /* msec */
			#define BUTTONS_COUNT_THRESHOLD 3

			static const unsigned short sgio2_map[] = {
			KEY_VOLUMEUP,
			KEY_VOLUMEDOWN
			};

			struct buttons_dev {
			struct input_polled_dev *poll_dev;
			unsigned short keymap[ARRAY_SIZE(sgio2_map)];
			int count[ARRAY_SIZE(sgio2_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;
			u64 status;
			int i;

			status = (readq(&mace->perif.audio.control) >> 23) & 3;

			for (i = 0; i < ARRAY_SIZE(bdev->keymap); i++) {
			if (status & (1U << i)) {
			writeq(status & ~(1U << i), &mace->perif.audio.control);
			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;
			}
			}
			}

			static int __devinit sgio2_buttons_probe(struct platform_device *pdev)
			{
			struct buttons_dev *bdev;
			struct input_polled_dev *poll_dev;
			struct input_dev *input;
			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, sgio2_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 = "SGI O2 buttons";
			input->phys = "sgio2/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(sgio2_map); i++)
			__set_bit(bdev->keymap[i], input->keybit);
			__clear_bit(KEY_RESERVED, input->keybit);

			bdev->poll_dev = poll_dev;
			dev_set_drvdata(&pdev->dev, bdev);

			error = input_register_polled_device(poll_dev);
			if (error)
			goto err_free_mem;

			return 0;

			err_free_mem:
			input_free_polled_device(poll_dev);
			kfree(bdev);
			dev_set_drvdata(&pdev->dev, NULL);
			return error;
			}

			static int __devexit sgio2_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);
			kfree(bdev);
			dev_set_drvdata(dev, NULL);

			return 0;
			}

			static struct platform_driver sgio2_buttons_driver = {
			.probe = sgio2_buttons_probe,
			.remove = __devexit_p(sgio2_buttons_remove),
			.driver = {
			.name = "sgio2btns",
			.owner = THIS_MODULE,
			},
			};

			static int __init sgio2_buttons_init(void)
			{
			return platform_driver_register(&sgio2_buttons_driver);
			}

			static void __exit sgio2_buttons_exit(void)
			{
			platform_driver_unregister(&sgio2_buttons_driver);
			}

			module_init(sgio2_buttons_init);
			module_exit(sgio2_buttons_exit);