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/*
* nvec_kbd: keyboard driver for a NVIDIA compliant embedded controller
*
* Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
*
* Authors: Pierre-Hugues Husson <phhusson@free.fr>
* Marc Dietrich <marvin24@gmx.de>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include "nvec-keytable.h"
#include "nvec.h"
enum kbd_subcmds {
CNFG_WAKE = 3,
CNFG_WAKE_KEY_REPORTING,
SET_LEDS = 0xed,
ENABLE_KBD = 0xf4,
DISABLE_KBD,
};
static unsigned char keycodes[ARRAY_SIZE(code_tab_102us)
+ ARRAY_SIZE(extcode_tab_us102)];
struct nvec_keys {
struct input_dev *input;
struct notifier_block notifier;
struct nvec_chip *nvec;
bool caps_lock;
};
static struct nvec_keys keys_dev;
static void nvec_kbd_toggle_led(void)
{
char buf[] = { NVEC_KBD, SET_LEDS, 0 };
keys_dev.caps_lock = !keys_dev.caps_lock;
if (keys_dev.caps_lock)
/* should be BIT(0) only, firmware bug? */
buf[2] = BIT(0) | BIT(1) | BIT(2);
nvec_write_async(keys_dev.nvec, buf, sizeof(buf));
}
static int nvec_keys_notifier(struct notifier_block *nb,
unsigned long event_type, void *data)
{
int code, state;
unsigned char *msg = (unsigned char *)data;
if (event_type == NVEC_KB_EVT) {
int _size = (msg[0] & (3 << 5)) >> 5;
/* power on/off button */
if (_size == NVEC_VAR_SIZE)
return NOTIFY_STOP;
if (_size == NVEC_3BYTES)
msg++;
code = msg[1] & 0x7f;
state = msg[1] & 0x80;
if (code_tabs[_size][code] == KEY_CAPSLOCK && state)
nvec_kbd_toggle_led();
input_report_key(keys_dev.input, code_tabs[_size][code],
!state);
input_sync(keys_dev.input);
return NOTIFY_STOP;
}
return NOTIFY_DONE;
}
static int nvec_kbd_event(struct input_dev *dev, unsigned int type,
unsigned int code, int value)
{
struct nvec_chip *nvec = keys_dev.nvec;
char buf[] = { NVEC_KBD, SET_LEDS, 0 };
if (type == EV_REP)
return 0;
if (type != EV_LED)
return -1;
if (code != LED_CAPSL)
return -1;
buf[2] = !!value;
nvec_write_async(nvec, buf, sizeof(buf));
return 0;
}
static int nvec_kbd_probe(struct platform_device *pdev)
{
struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
int i, j, err;
struct input_dev *idev;
char clear_leds[] = { NVEC_KBD, SET_LEDS, 0 },
enable_kbd[] = { NVEC_KBD, ENABLE_KBD },
cnfg_wake[] = { NVEC_KBD, CNFG_WAKE, true, true },
cnfg_wake_key_reporting[] = { NVEC_KBD, CNFG_WAKE_KEY_REPORTING,
true };
j = 0;
for (i = 0; i < ARRAY_SIZE(code_tab_102us); ++i)
keycodes[j++] = code_tab_102us[i];
for (i = 0; i < ARRAY_SIZE(extcode_tab_us102); ++i)
keycodes[j++] = extcode_tab_us102[i];
idev = input_allocate_device();
idev->name = "nvec keyboard";
idev->phys = "nvec";
idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_LED);
idev->ledbit[0] = BIT_MASK(LED_CAPSL);
idev->event = nvec_kbd_event;
idev->keycode = keycodes;
idev->keycodesize = sizeof(unsigned char);
idev->keycodemax = ARRAY_SIZE(keycodes);
for (i = 0; i < ARRAY_SIZE(keycodes); ++i)
set_bit(keycodes[i], idev->keybit);
clear_bit(0, idev->keybit);
err = input_register_device(idev);
if (err)
goto fail;
keys_dev.input = idev;
keys_dev.notifier.notifier_call = nvec_keys_notifier;
keys_dev.nvec = nvec;
nvec_register_notifier(nvec, &keys_dev.notifier, 0);
/* Enable keyboard */
nvec_write_async(nvec, enable_kbd, 2);
/* configures wake on special keys */
nvec_write_async(nvec, cnfg_wake, 4);
/* enable wake key reporting */
nvec_write_async(nvec, cnfg_wake_key_reporting, 3);
/* Disable caps lock LED */
nvec_write_async(nvec, clear_leds, sizeof(clear_leds));
return 0;
fail:
input_free_device(idev);
return err;
}
static int nvec_kbd_remove(struct platform_device *pdev)
{
struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
char disable_kbd[] = { NVEC_KBD, DISABLE_KBD },
uncnfg_wake_key_reporting[] = { NVEC_KBD, CNFG_WAKE_KEY_REPORTING,
false };
nvec_write_async(nvec, uncnfg_wake_key_reporting, 3);
nvec_write_async(nvec, disable_kbd, 2);
nvec_unregister_notifier(nvec, &keys_dev.notifier);
input_unregister_device(keys_dev.input);
return 0;
}
static struct platform_driver nvec_kbd_driver = {
.probe = nvec_kbd_probe,
.remove = nvec_kbd_remove,
.driver = {
.name = "nvec-kbd",
.owner = THIS_MODULE,
},
};
module_platform_driver(nvec_kbd_driver);
MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
MODULE_DESCRIPTION("NVEC keyboard driver");
MODULE_ALIAS("platform:nvec-kbd");
MODULE_LICENSE("GPL");
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