2 * nvec_kbd: keyboard driver for a NVIDIA compliant embedded controller
4 * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
6 * Authors: Pierre-Hugues Husson <phhusson@free.fr>
7 * Marc Dietrich <marvin24@gmx.de>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file "COPYING" in the main directory of this archive
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/input.h>
18 #include <linux/delay.h>
19 #include <linux/platform_device.h>
21 #include "nvec-keytable.h"
26 CNFG_WAKE_KEY_REPORTING
,
32 static unsigned char keycodes
[ARRAY_SIZE(code_tab_102us
)
33 + ARRAY_SIZE(extcode_tab_us102
)];
36 struct input_dev
*input
;
37 struct notifier_block notifier
;
38 struct nvec_chip
*nvec
;
42 static struct nvec_keys keys_dev
;
44 static void nvec_kbd_toggle_led(void)
46 char buf
[] = { NVEC_KBD
, SET_LEDS
, 0 };
48 keys_dev
.caps_lock
= !keys_dev
.caps_lock
;
50 if (keys_dev
.caps_lock
)
51 /* should be BIT(0) only, firmware bug? */
52 buf
[2] = BIT(0) | BIT(1) | BIT(2);
54 nvec_write_async(keys_dev
.nvec
, buf
, sizeof(buf
));
57 static int nvec_keys_notifier(struct notifier_block
*nb
,
58 unsigned long event_type
, void *data
)
61 unsigned char *msg
= data
;
63 if (event_type
== NVEC_KB_EVT
) {
64 int _size
= (msg
[0] & (3 << 5)) >> 5;
66 /* power on/off button */
67 if (_size
== NVEC_VAR_SIZE
)
70 if (_size
== NVEC_3BYTES
)
74 state
= msg
[1] & 0x80;
76 if (code_tabs
[_size
][code
] == KEY_CAPSLOCK
&& state
)
77 nvec_kbd_toggle_led();
79 input_report_key(keys_dev
.input
, code_tabs
[_size
][code
],
81 input_sync(keys_dev
.input
);
89 static int nvec_kbd_event(struct input_dev
*dev
, unsigned int type
,
90 unsigned int code
, int value
)
92 struct nvec_chip
*nvec
= keys_dev
.nvec
;
93 char buf
[] = { NVEC_KBD
, SET_LEDS
, 0 };
101 if (code
!= LED_CAPSL
)
105 nvec_write_async(nvec
, buf
, sizeof(buf
));
110 static int nvec_kbd_probe(struct platform_device
*pdev
)
112 struct nvec_chip
*nvec
= dev_get_drvdata(pdev
->dev
.parent
);
114 struct input_dev
*idev
;
115 char clear_leds
[] = { NVEC_KBD
, SET_LEDS
, 0 },
116 enable_kbd
[] = { NVEC_KBD
, ENABLE_KBD
},
117 cnfg_wake
[] = { NVEC_KBD
, CNFG_WAKE
, true, true },
118 cnfg_wake_key_reporting
[] = { NVEC_KBD
, CNFG_WAKE_KEY_REPORTING
,
123 for (i
= 0; i
< ARRAY_SIZE(code_tab_102us
); ++i
)
124 keycodes
[j
++] = code_tab_102us
[i
];
126 for (i
= 0; i
< ARRAY_SIZE(extcode_tab_us102
); ++i
)
127 keycodes
[j
++] = extcode_tab_us102
[i
];
129 idev
= devm_input_allocate_device(&pdev
->dev
);
130 idev
->name
= "nvec keyboard";
132 idev
->evbit
[0] = BIT_MASK(EV_KEY
) | BIT_MASK(EV_REP
) | BIT_MASK(EV_LED
);
133 idev
->ledbit
[0] = BIT_MASK(LED_CAPSL
);
134 idev
->event
= nvec_kbd_event
;
135 idev
->keycode
= keycodes
;
136 idev
->keycodesize
= sizeof(unsigned char);
137 idev
->keycodemax
= ARRAY_SIZE(keycodes
);
139 for (i
= 0; i
< ARRAY_SIZE(keycodes
); ++i
)
140 set_bit(keycodes
[i
], idev
->keybit
);
142 clear_bit(0, idev
->keybit
);
143 err
= input_register_device(idev
);
147 keys_dev
.input
= idev
;
148 keys_dev
.notifier
.notifier_call
= nvec_keys_notifier
;
149 keys_dev
.nvec
= nvec
;
150 nvec_register_notifier(nvec
, &keys_dev
.notifier
, 0);
152 /* Enable keyboard */
153 nvec_write_async(nvec
, enable_kbd
, 2);
155 /* configures wake on special keys */
156 nvec_write_async(nvec
, cnfg_wake
, 4);
157 /* enable wake key reporting */
158 nvec_write_async(nvec
, cnfg_wake_key_reporting
, 3);
160 /* Disable caps lock LED */
161 nvec_write_async(nvec
, clear_leds
, sizeof(clear_leds
));
166 static int nvec_kbd_remove(struct platform_device
*pdev
)
168 struct nvec_chip
*nvec
= dev_get_drvdata(pdev
->dev
.parent
);
169 char disable_kbd
[] = { NVEC_KBD
, DISABLE_KBD
},
170 uncnfg_wake_key_reporting
[] = { NVEC_KBD
, CNFG_WAKE_KEY_REPORTING
,
172 nvec_write_async(nvec
, uncnfg_wake_key_reporting
, 3);
173 nvec_write_async(nvec
, disable_kbd
, 2);
174 nvec_unregister_notifier(nvec
, &keys_dev
.notifier
);
179 static struct platform_driver nvec_kbd_driver
= {
180 .probe
= nvec_kbd_probe
,
181 .remove
= nvec_kbd_remove
,
187 module_platform_driver(nvec_kbd_driver
);
189 MODULE_AUTHOR("Marc Dietrich <marvin24@gmx.de>");
190 MODULE_DESCRIPTION("NVEC keyboard driver");
191 MODULE_ALIAS("platform:nvec-kbd");
192 MODULE_LICENSE("GPL");