Input: add driver for MIPS Cobalt back panel buttons
Tested on Cobalt Qube2. Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Yoichi Yuasa
Dmitry Torokhov
parent
24bf10ab2d
commit
bebb8a2bc1
3 changed files with 220 additions and 1 deletions
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@ -40,6 +40,15 @@ config INPUT_M68K_BEEP
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tristate "M68k Beeper support"
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depends on M68K
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config INPUT_COBALT_BTNS
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tristate "Cobalt button interface"
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depends on MIPS_COBALT
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help
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Say Y here if you want to support MIPS Cobalt button interface.
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To compile this driver as a module, choose M here: the
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module will be called cobalt_btns.
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config INPUT_WISTRON_BTNS
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tristate "x86 Wistron laptop button interface"
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depends on X86 && !X86_64
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@ -82,7 +91,7 @@ config INPUT_UINPUT
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module will be called uinput.
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config HP_SDC_RTC
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tristate "HP SDC Real Time Clock"
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tristate "HP SDC Real Time Clock"
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depends on GSC || HP300
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select HP_SDC
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help
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@ -8,6 +8,7 @@ obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o
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obj-$(CONFIG_INPUT_PCSPKR) += pcspkr.o
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obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
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obj-$(CONFIG_INPUT_UINPUT) += uinput.o
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obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
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obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
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obj-$(CONFIG_INPUT_ATLAS_BTNS) += atlas_btns.o
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obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
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209
drivers/input/misc/cobalt_btns.c
Normal file
209
drivers/input/misc/cobalt_btns.c
Normal file
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@ -0,0 +1,209 @@
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/*
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* Cobalt button interface driver.
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*
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* Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/jiffies.h>
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#include <linux/timer.h>
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#define BUTTONS_POLL_INTERVAL 30 /* msec */
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#define BUTTONS_COUNT_THRESHOLD 3
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#define BUTTONS_STATUS_MASK 0xfe000000
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struct buttons_dev {
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struct input_dev *input;
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void __iomem *reg;
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};
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struct buttons_map {
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uint32_t mask;
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int keycode;
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int count;
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};
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static struct buttons_map buttons_map[] = {
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{ 0x02000000, KEY_RESTART, },
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{ 0x04000000, KEY_LEFT, },
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{ 0x08000000, KEY_UP, },
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{ 0x10000000, KEY_DOWN, },
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{ 0x20000000, KEY_RIGHT, },
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{ 0x40000000, KEY_ENTER, },
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{ 0x80000000, KEY_SELECT, },
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};
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static struct resource cobalt_buttons_resource __initdata = {
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.start = 0x1d000000,
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.end = 0x1d000003,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device *cobalt_buttons_device;
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static struct timer_list buttons_timer;
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static void handle_buttons(unsigned long data)
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{
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struct buttons_map *button = buttons_map;
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struct buttons_dev *bdev;
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uint32_t status;
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int i;
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bdev = (struct buttons_dev *)data;
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status = readl(bdev->reg);
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status = ~status & BUTTONS_STATUS_MASK;
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for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
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if (status & button->mask) {
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button->count++;
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} else {
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if (button->count >= BUTTONS_COUNT_THRESHOLD) {
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input_report_key(bdev->input, button->keycode, 0);
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input_sync(bdev->input);
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}
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button->count = 0;
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}
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if (button->count == BUTTONS_COUNT_THRESHOLD) {
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input_report_key(bdev->input, button->keycode, 1);
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input_sync(bdev->input);
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}
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button++;
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}
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mod_timer(&buttons_timer, jiffies + msecs_to_jiffies(BUTTONS_POLL_INTERVAL));
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}
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static int cobalt_buttons_open(struct input_dev *dev)
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{
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mod_timer(&buttons_timer, jiffies + msecs_to_jiffies(BUTTONS_POLL_INTERVAL));
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return 0;
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}
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static void cobalt_buttons_close(struct input_dev *dev)
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{
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del_timer_sync(&buttons_timer);
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}
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static int __devinit cobalt_buttons_probe(struct platform_device *pdev)
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{
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struct buttons_dev *bdev;
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struct input_dev *input;
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struct resource *res;
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int error, i;
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bdev = kzalloc(sizeof(struct buttons_dev), GFP_KERNEL);
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input = input_allocate_device();
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if (!bdev || !input) {
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error = -ENOMEM;
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goto err_free_mem;
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}
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input->name = "Cobalt buttons";
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input->phys = "cobalt/input0";
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input->id.bustype = BUS_HOST;
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input->cdev.dev = &pdev->dev;
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input->open = cobalt_buttons_open;
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input->close = cobalt_buttons_close;
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input->evbit[0] = BIT(EV_KEY);
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for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
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set_bit(buttons_map[i].keycode, input->keybit);
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buttons_map[i].count = 0;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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error = -EBUSY;
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goto err_free_mem;
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}
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bdev->input = input;
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bdev->reg = ioremap(res->start, res->end - res->start + 1);
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dev_set_drvdata(&pdev->dev, bdev);
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setup_timer(&buttons_timer, handle_buttons, (unsigned long)bdev);
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error = input_register_device(input);
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if (error)
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goto err_iounmap;
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return 0;
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err_iounmap:
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iounmap(bdev->reg);
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err_free_mem:
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input_free_device(input);
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kfree(bdev);
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dev_set_drvdata(&pdev->dev, NULL);
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return error;
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}
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static int __devexit cobalt_buttons_remove(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct buttons_dev *bdev = dev_get_drvdata(dev);
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input_unregister_device(bdev->input);
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iounmap(bdev->reg);
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kfree(bdev);
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dev_set_drvdata(dev, NULL);
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return 0;
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}
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static struct platform_driver cobalt_buttons_driver = {
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.probe = cobalt_buttons_probe,
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.remove = __devexit_p(cobalt_buttons_remove),
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.driver = {
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.name = "Cobalt buttons",
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.owner = THIS_MODULE,
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},
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};
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static int __init cobalt_buttons_init(void)
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{
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int retval;
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cobalt_buttons_device = platform_device_register_simple("Cobalt buttons", -1,
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&cobalt_buttons_resource, 1);
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if (IS_ERR(cobalt_buttons_device)) {
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retval = PTR_ERR(cobalt_buttons_device);
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return retval;
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}
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retval = platform_driver_register(&cobalt_buttons_driver);
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if (retval < 0)
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platform_device_unregister(cobalt_buttons_device);
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return retval;
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}
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static void __exit cobalt_buttons_exit(void)
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{
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platform_driver_unregister(&cobalt_buttons_driver);
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platform_device_unregister(cobalt_buttons_device);
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}
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module_init(cobalt_buttons_init);
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module_exit(cobalt_buttons_exit);
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