cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/keyboard/xtkbd.c

/*
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 */

/*
 * XT keyboard driver for Linux
 */

/*
 * 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
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/serio.h>


#define DRIVER_DESC	"XT keyboard driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");


#define XTKBD_EMUL0	0xe0

#define XTKBD_EMUL1	0xe1

#define XTKBD_KEY	0x7f

#define XTKBD_RELEASE	0x80


static unsigned char xtkbd_keycode[256] = {
	  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
	 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
	 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
	 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
	 80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,
	106
};


struct xtkbd {
	
unsigned char keycode[256];
	
struct input_dev *dev;
	
struct serio *serio;
	
char phys[32];
};


static irqreturn_t xtkbd_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct xtkbd *xtkbd = serio_get_drvdata(serio); switch (data) { case XTKBD_EMUL0: case XTKBD_EMUL1: break; default: if (xtkbd->keycode[data & XTKBD_KEY]) { input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE)); input_sync(xtkbd->dev); } else { printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n", data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed"); } } return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik10191.82%240.00%
Andrew Morton54.55%120.00%
Dmitry Torokhov32.73%120.00%
Adrian Bunk10.91%120.00%
Total110100.00%5100.00%


static int xtkbd_connect(struct serio *serio, struct serio_driver *drv) { struct xtkbd *xtkbd; struct input_dev *input_dev; int err = -ENOMEM; int i; xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL); input_dev = input_allocate_device(); if (!xtkbd || !input_dev) goto fail1; xtkbd->serio = serio; xtkbd->dev = input_dev; snprintf(xtkbd->phys, sizeof(xtkbd->phys), "%s/input0", serio->phys); memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode)); input_dev->name = "XT Keyboard"; input_dev->phys = xtkbd->phys; input_dev->id.bustype = BUS_XTKBD; input_dev->id.vendor = 0x0001; input_dev->id.product = 0x0001; input_dev->id.version = 0x0100; input_dev->dev.parent = &serio->dev; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); input_dev->keycode = xtkbd->keycode; input_dev->keycodesize = sizeof(unsigned char); input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode); for (i = 0; i < 255; i++) set_bit(xtkbd->keycode[i], input_dev->keybit); clear_bit(0, input_dev->keybit); serio_set_drvdata(serio, xtkbd); err = serio_open(serio, drv); if (err) goto fail2; err = input_register_device(xtkbd->dev); if (err) goto fail3; return 0; fail3: serio_close(serio); fail2: serio_set_drvdata(serio, NULL); fail1: input_free_device(input_dev); kfree(xtkbd); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov18958.70%763.64%
Vojtech Pavlik13040.37%218.18%
Jiri Slaby20.62%19.09%
Adrian Bunk10.31%19.09%
Total322100.00%11100.00%


static void xtkbd_disconnect(struct serio *serio) { struct xtkbd *xtkbd = serio_get_drvdata(serio); serio_close(serio); serio_set_drvdata(serio, NULL); input_unregister_device(xtkbd->dev); kfree(xtkbd); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik2760.00%125.00%
Dmitry Torokhov1737.78%250.00%
Adrian Bunk12.22%125.00%
Total45100.00%4100.00%

static struct serio_device_id xtkbd_serio_ids[] = { { .type = SERIO_XT, .proto = SERIO_ANY, .id = SERIO_ANY, .extra = SERIO_ANY, }, { 0 } }; MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids); static struct serio_driver xtkbd_drv = { .driver = { .name = "xtkbd", }, .description = DRIVER_DESC, .id_table = xtkbd_serio_ids, .interrupt = xtkbd_interrupt, .connect = xtkbd_connect, .disconnect = xtkbd_disconnect, }; module_serio_driver(xtkbd_drv);

Overall Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik58566.55%420.00%
Dmitry Torokhov28031.85%1155.00%
Adrian Bunk50.57%210.00%
Andrew Morton50.57%15.00%
Axel Lin20.23%15.00%
Jiri Slaby20.23%15.00%
Total879100.00%20100.00%
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