/*
* Cobalt button interface driver.
*
- * Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
+ * Copyright (C) 2007-2008 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
*
* 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/init.h>
-#include <linux/input.h>
+#include <linux/input-polldev.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 const unsigned short cobalt_map[] = {
+ KEY_RESERVED,
+ KEY_RESTART,
+ KEY_LEFT,
+ KEY_UP,
+ KEY_DOWN,
+ KEY_RIGHT,
+ KEY_ENTER,
+ KEY_SELECT
};
-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, },
+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 struct timer_list buttons_timer;
-
-static void handle_buttons(unsigned long data)
+static void handle_buttons(struct input_polled_dev *dev)
{
- struct buttons_map *button = buttons_map;
- struct buttons_dev *bdev;
+ struct buttons_dev *bdev = dev->private;
+ struct input_dev *input = dev->input;
uint32_t status;
int i;
- bdev = (struct buttons_dev *)data;
- status = readl(bdev->reg);
- status = ~status & BUTTONS_STATUS_MASK;
+ status = ~readl(bdev->reg) >> 24;
- for (i = 0; i < ARRAY_SIZE(buttons_map); i++) {
- if (status & button->mask) {
- button->count++;
+ 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 (button->count >= BUTTONS_COUNT_THRESHOLD) {
- input_report_key(bdev->input, button->keycode, 0);
- input_sync(bdev->input);
+ 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);
}
- button->count = 0;
- }
-
- if (button->count == BUTTONS_COUNT_THRESHOLD) {
- input_report_key(bdev->input, button->keycode, 1);
- input_sync(bdev->input);
+ bdev->count[i] = 0;
}
-
- 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_polled_dev *poll_dev;
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) {
+ 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->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;
- }
+ 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) {
goto err_free_mem;
}
- bdev->input = input;
+ bdev->poll_dev = poll_dev;
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);
+ error = input_register_polled_device(poll_dev);
if (error)
goto err_iounmap;
err_iounmap:
iounmap(bdev->reg);
err_free_mem:
- input_free_device(input);
+ input_free_polled_device(poll_dev);
kfree(bdev);
dev_set_drvdata(&pdev->dev, NULL);
return error;
struct device *dev = &pdev->dev;
struct buttons_dev *bdev = dev_get_drvdata(dev);
- input_unregister_device(bdev->input);
+ input_unregister_polled_device(bdev->poll_dev);
+ input_free_polled_device(bdev->poll_dev);
iounmap(bdev->reg);
kfree(bdev);
dev_set_drvdata(dev, NULL);
return 0;
}
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:Cobalt buttons");
+
static struct platform_driver cobalt_buttons_driver = {
.probe = cobalt_buttons_probe,
.remove = __devexit_p(cobalt_buttons_remove),