PageRenderTime 60ms CodeModel.GetById 19ms app.highlight 35ms RepoModel.GetById 2ms app.codeStats 0ms

/drivers/input/keyboard/newtonkbd.c

https://bitbucket.org/evzijst/gittest
C | 184 lines | 123 code | 35 blank | 26 comment | 7 complexity | 73708640a529cda51bed1d9ae71c80f7 MD5 | raw file
  1/*
  2 *  Copyright (c) 2000 Justin Cormack
  3 */
  4
  5/*
  6 * Newton keyboard driver for Linux
  7 */
  8
  9/*
 10 * This program is free software; you can redistribute it and/or modify
 11 * it under the terms of the GNU General Public License as published by
 12 * the Free Software Foundation; either version 2 of the License, or
 13 * (at your option) any later version.
 14 *
 15 * This program is distributed in the hope that it will be useful,
 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 18 * GNU General Public License for more details.
 19 *
 20 * You should have received a copy of the GNU General Public License
 21 * along with this program; if not, write to the Free Software
 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 23 *
 24 * Should you need to contact me, the author, you can do so either by
 25 * e-mail - mail your message to <j.cormack@doc.ic.ac.uk>, or by paper mail:
 26 * Justin Cormack, 68 Dartmouth Park Road, London NW5 1SN, UK.
 27 */
 28
 29#include <linux/slab.h>
 30#include <linux/module.h>
 31#include <linux/input.h>
 32#include <linux/init.h>
 33#include <linux/serio.h>
 34
 35#define DRIVER_DESC	"Newton keyboard driver"
 36
 37MODULE_AUTHOR("Justin Cormack <j.cormack@doc.ic.ac.uk>");
 38MODULE_DESCRIPTION(DRIVER_DESC);
 39MODULE_LICENSE("GPL");
 40
 41#define NKBD_KEY	0x7f
 42#define NKBD_PRESS	0x80
 43
 44static unsigned char nkbd_keycode[128] = {
 45	KEY_A, KEY_S, KEY_D, KEY_F, KEY_H, KEY_G, KEY_Z, KEY_X,
 46	KEY_C, KEY_V, 0, KEY_B, KEY_Q, KEY_W, KEY_E, KEY_R,
 47	KEY_Y, KEY_T, KEY_1, KEY_2, KEY_3, KEY_4, KEY_6, KEY_5,
 48	KEY_EQUAL, KEY_9, KEY_7, KEY_MINUS, KEY_8, KEY_0, KEY_RIGHTBRACE, KEY_O,
 49	KEY_U, KEY_LEFTBRACE, KEY_I, KEY_P, KEY_ENTER, KEY_L, KEY_J, KEY_APOSTROPHE,
 50	KEY_K, KEY_SEMICOLON, KEY_BACKSLASH, KEY_COMMA, KEY_SLASH, KEY_N, KEY_M, KEY_DOT,
 51	KEY_TAB, KEY_SPACE, KEY_GRAVE, KEY_DELETE, 0, 0, 0, KEY_LEFTMETA,
 52	KEY_LEFTSHIFT, KEY_CAPSLOCK, KEY_LEFTALT, KEY_LEFTCTRL, KEY_RIGHTSHIFT, 0, 0, 0,
 53	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 54	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 55	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 56	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 57	KEY_LEFT, KEY_RIGHT, KEY_DOWN, KEY_UP, 0
 58};
 59
 60static char *nkbd_name = "Newton Keyboard";
 61
 62struct nkbd {
 63	unsigned char keycode[128];
 64	struct input_dev dev;
 65	struct serio *serio;
 66	char phys[32];
 67};
 68
 69static irqreturn_t nkbd_interrupt(struct serio *serio,
 70		unsigned char data, unsigned int flags, struct pt_regs *regs)
 71{
 72	struct nkbd *nkbd = serio_get_drvdata(serio);
 73
 74	/* invalid scan codes are probably the init sequence, so we ignore them */
 75	if (nkbd->keycode[data & NKBD_KEY]) {
 76		input_regs(&nkbd->dev, regs);
 77		input_report_key(&nkbd->dev, nkbd->keycode[data & NKBD_KEY], data & NKBD_PRESS);
 78		input_sync(&nkbd->dev);
 79	}
 80
 81	else if (data == 0xe7) /* end of init sequence */
 82		printk(KERN_INFO "input: %s on %s\n", nkbd_name, serio->phys);
 83	return IRQ_HANDLED;
 84
 85}
 86
 87static int nkbd_connect(struct serio *serio, struct serio_driver *drv)
 88{
 89	struct nkbd *nkbd;
 90	int i;
 91	int err;
 92
 93	if (!(nkbd = kmalloc(sizeof(struct nkbd), GFP_KERNEL)))
 94		return -ENOMEM;
 95
 96	memset(nkbd, 0, sizeof(struct nkbd));
 97
 98	nkbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 99
100	nkbd->serio = serio;
101
102	init_input_dev(&nkbd->dev);
103	nkbd->dev.keycode = nkbd->keycode;
104	nkbd->dev.keycodesize = sizeof(unsigned char);
105	nkbd->dev.keycodemax = ARRAY_SIZE(nkbd_keycode);
106	nkbd->dev.private = nkbd;
107
108	serio_set_drvdata(serio, nkbd);
109
110	err = serio_open(serio, drv);
111	if (err) {
112		serio_set_drvdata(serio, NULL);
113		kfree(nkbd);
114		return err;
115	}
116
117	memcpy(nkbd->keycode, nkbd_keycode, sizeof(nkbd->keycode));
118	for (i = 0; i < 128; i++)
119		set_bit(nkbd->keycode[i], nkbd->dev.keybit);
120	clear_bit(0, nkbd->dev.keybit);
121
122	sprintf(nkbd->phys, "%s/input0", serio->phys);
123
124	nkbd->dev.name = nkbd_name;
125	nkbd->dev.phys = nkbd->phys;
126	nkbd->dev.id.bustype = BUS_RS232;
127	nkbd->dev.id.vendor = SERIO_NEWTON;
128	nkbd->dev.id.product = 0x0001;
129	nkbd->dev.id.version = 0x0100;
130	nkbd->dev.dev = &serio->dev;
131
132	input_register_device(&nkbd->dev);
133
134	printk(KERN_INFO "input: %s on %s\n", nkbd_name, serio->phys);
135
136	return 0;
137}
138
139static void nkbd_disconnect(struct serio *serio)
140{
141	struct nkbd *nkbd = serio_get_drvdata(serio);
142
143	input_unregister_device(&nkbd->dev);
144	serio_close(serio);
145	serio_set_drvdata(serio, NULL);
146	kfree(nkbd);
147}
148
149static struct serio_device_id nkbd_serio_ids[] = {
150	{
151		.type	= SERIO_RS232,
152		.proto	= SERIO_NEWTON,
153		.id	= SERIO_ANY,
154		.extra	= SERIO_ANY,
155	},
156	{ 0 }
157};
158
159MODULE_DEVICE_TABLE(serio, nkbd_serio_ids);
160
161static struct serio_driver nkbd_drv = {
162	.driver		= {
163		.name	= "newtonkbd",
164	},
165	.description	= DRIVER_DESC,
166	.id_table	= nkbd_serio_ids,
167	.interrupt	= nkbd_interrupt,
168	.connect	= nkbd_connect,
169	.disconnect	= nkbd_disconnect,
170};
171
172static int __init nkbd_init(void)
173{
174	serio_register_driver(&nkbd_drv);
175	return 0;
176}
177
178static void __exit nkbd_exit(void)
179{
180	serio_unregister_driver(&nkbd_drv);
181}
182
183module_init(nkbd_init);
184module_exit(nkbd_exit);