Input: new driver for SGI O2 volume buttons
This driver adds support for the volume buttons on the front of every SGI O2 workstation. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
parent
b4ecda3e96
commit
3bee2a04cf
|
@ -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
|
||||||
|
|
|
@ -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
|
||||||
|
|
156
drivers/input/misc/sgio2_btns.c
Normal file
156
drivers/input/misc/sgio2_btns.c
Normal file
|
@ -0,0 +1,156 @@
|
||||||
|
/*
|
||||||
|
* 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);
|
Loading…
Reference in a new issue