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/drivers/input/keyboard/stowaway.c

http://github.com/mirrors/linux
C | 156 lines | 117 code | 27 blank | 12 comment | 6 complexity | cb8a8e2b7720a029e95c73304c655593 MD5 | raw file
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Stowaway keyboard driver for Linux
  4 */
  5
  6/*
  7 *  Copyright (c) 2006 Marek Vasut
  8 *
  9 *  Based on Newton keyboard driver for Linux
 10 *  by Justin Cormack
 11 */
 12
 13/*
 14 */
 15
 16#include <linux/slab.h>
 17#include <linux/module.h>
 18#include <linux/input.h>
 19#include <linux/serio.h>
 20
 21#define DRIVER_DESC	"Stowaway keyboard driver"
 22
 23MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 24MODULE_DESCRIPTION(DRIVER_DESC);
 25MODULE_LICENSE("GPL");
 26
 27#define SKBD_KEY_MASK	0x7f
 28#define SKBD_RELEASE	0x80
 29
 30static unsigned char skbd_keycode[128] = {
 31	KEY_1, KEY_2, KEY_3, KEY_Z, KEY_4, KEY_5, KEY_6, KEY_7,
 32	0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_GRAVE,
 33	KEY_X, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_SPACE,
 34	KEY_CAPSLOCK, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0,
 35	0, 0, 0, KEY_LEFTALT, 0, 0, 0, 0,
 36	0, 0, 0, 0, KEY_C, KEY_V, KEY_B, KEY_N,
 37	KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, KEY_HOME, KEY_8, KEY_9, KEY_0, KEY_ESC,
 38	KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, KEY_END, KEY_U, KEY_I, KEY_O, KEY_P,
 39	KEY_APOSTROPHE, KEY_ENTER, KEY_PAGEUP,0, KEY_J, KEY_K, KEY_L, KEY_SEMICOLON,
 40	KEY_SLASH, KEY_UP, KEY_PAGEDOWN, 0,KEY_M, KEY_COMMA, KEY_DOT, KEY_INSERT,
 41	KEY_DELETE, KEY_LEFT, KEY_DOWN, KEY_RIGHT,  0, 0, 0,
 42	KEY_LEFTSHIFT, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0,
 43	0, 0, 0, 0, 0, 0, 0, 0,
 44	0, 0, 0, 0, 0, 0, 0, 0,
 45	0, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,
 46	KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_F12, 0, 0, 0
 47};
 48
 49struct skbd {
 50	unsigned char keycode[128];
 51	struct input_dev *dev;
 52	struct serio *serio;
 53	char phys[32];
 54};
 55
 56static irqreturn_t skbd_interrupt(struct serio *serio, unsigned char data,
 57				  unsigned int flags)
 58{
 59	struct skbd *skbd = serio_get_drvdata(serio);
 60	struct input_dev *dev = skbd->dev;
 61
 62	if (skbd->keycode[data & SKBD_KEY_MASK]) {
 63		input_report_key(dev, skbd->keycode[data & SKBD_KEY_MASK],
 64				 !(data & SKBD_RELEASE));
 65		input_sync(dev);
 66	}
 67
 68	return IRQ_HANDLED;
 69}
 70
 71static int skbd_connect(struct serio *serio, struct serio_driver *drv)
 72{
 73	struct skbd *skbd;
 74	struct input_dev *input_dev;
 75	int err = -ENOMEM;
 76	int i;
 77
 78	skbd = kzalloc(sizeof(struct skbd), GFP_KERNEL);
 79	input_dev = input_allocate_device();
 80	if (!skbd || !input_dev)
 81		goto fail1;
 82
 83	skbd->serio = serio;
 84	skbd->dev = input_dev;
 85	snprintf(skbd->phys, sizeof(skbd->phys), "%s/input0", serio->phys);
 86	memcpy(skbd->keycode, skbd_keycode, sizeof(skbd->keycode));
 87
 88	input_dev->name = "Stowaway Keyboard";
 89	input_dev->phys = skbd->phys;
 90	input_dev->id.bustype = BUS_RS232;
 91	input_dev->id.vendor = SERIO_STOWAWAY;
 92	input_dev->id.product = 0x0001;
 93	input_dev->id.version = 0x0100;
 94	input_dev->dev.parent = &serio->dev;
 95
 96	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
 97	input_dev->keycode = skbd->keycode;
 98	input_dev->keycodesize = sizeof(unsigned char);
 99	input_dev->keycodemax = ARRAY_SIZE(skbd_keycode);
100	for (i = 0; i < ARRAY_SIZE(skbd_keycode); i++)
101		set_bit(skbd_keycode[i], input_dev->keybit);
102	clear_bit(0, input_dev->keybit);
103
104	serio_set_drvdata(serio, skbd);
105
106	err = serio_open(serio, drv);
107	if (err)
108		goto fail2;
109
110	err = input_register_device(skbd->dev);
111	if (err)
112		goto fail3;
113
114	return 0;
115
116 fail3: serio_close(serio);
117 fail2:	serio_set_drvdata(serio, NULL);
118 fail1:	input_free_device(input_dev);
119	kfree(skbd);
120	return err;
121}
122
123static void skbd_disconnect(struct serio *serio)
124{
125	struct skbd *skbd = serio_get_drvdata(serio);
126
127	serio_close(serio);
128	serio_set_drvdata(serio, NULL);
129	input_unregister_device(skbd->dev);
130	kfree(skbd);
131}
132
133static const struct serio_device_id skbd_serio_ids[] = {
134	{
135		.type	= SERIO_RS232,
136		.proto	= SERIO_STOWAWAY,
137		.id	= SERIO_ANY,
138		.extra	= SERIO_ANY,
139	},
140	{ 0 }
141};
142
143MODULE_DEVICE_TABLE(serio, skbd_serio_ids);
144
145static struct serio_driver skbd_drv = {
146	.driver		= {
147		.name	= "stowaway",
148	},
149	.description	= DRIVER_DESC,
150	.id_table	= skbd_serio_ids,
151	.interrupt	= skbd_interrupt,
152	.connect	= skbd_connect,
153	.disconnect	= skbd_disconnect,
154};
155
156module_serio_driver(skbd_drv);