/*

From: faith@cs.unc.edu (Rik Faith)

Subject: User mode keyboard rate changer

Date: 27 Apr 92 13:44:26 GMT

I put together this program, called kbdrate.c, which will reset the keyboard

repeat rate and delay in user mode.  The program must have read/write

access to /dev/port, so if /dev/port is only read/writeable by group port,

then kbdrate must run setgid to group port (for example).

The "rate" is the rate in characters per second

The "delay" is the amount of time the key must remain depressed before it

will start to repeat.

Usage examples:

kbdrate                 set rate to IBM default (10.9 cps, 250ms delay)

kbdrate -r 30.0         set rate to 30 cps and delay to 250ms

kbdrate -r 20.0 -s      set rate to 20 cps (delay 250ms) -- don't print message

kbdrate -r 0 -d 0       set rate to 2.0 cps and delay to 250 ms

I find it useful to put kbdrate in my /etc/rc file so that the keyboard

rate is set to something that I find comfortable at boot time.  This sure

beats rebuilding the kernel!

  kbdrate.c -- Set keyboard typematic rate (and delay)

  Created: Thu Apr 23 12:24:30 1992

  Author: Rickard E. Faith, faith@cs.unc.edu

  Copyright 1992 Rickard E. Faith.  Distributed under the GPL.

  This program comes with ABSOLUTELY NO WARRANTY.

  Usage: kbdrate [-r rate] [-d delay] [-s]

         Rate can range from 2.0 to 30.0 (units are characters per second)

         Delay can range from 250 to 1000 (units are milliseconds)

         -s suppressed message

  Compiles under gcc 2.1 for Linux (tested with the pre-0.96 kernel)

  Wed Jun 22 21:35:43 1994, faith@cs.unc.edu:

            Changed valid_rates per suggestion by Andries.Brouwer@cwi.nl.

  Wed Jun 22 22:18:29 1994, faith@cs.unc.edu:

            Added patch for AUSTIN notebooks from John Bowman

            (bowman@hagar.ph.utexas.edu)

  Linux/68k modifications by Roman Hodek 

 				(Roman.Hodek@informatik.uni-erlangen.de):

  Reading/writing the Intel I/O ports via /dev/port is not the

  English way... Such hardware dependent stuff can never work on

  other architectures.

  Linux/68k has an new ioctl for setting the keyboard repeat rate

  and delay. Both values are counted in msecs, the kernel will do

  any rounding to values possible with the underlying hardware.

  kbdrate now first tries if the KDKBDREP ioctl is available. If it

  is, it is used, else the old method is applied.

  1999-02-22 Arkadiusz Miśkiewicz <misiek@misiek.eu.org>

  - added Native Language Support

  1999-03-17

  Linux/SPARC modifications by Jeffrey Connell <ankh@canuck.gen.nz>:

  It seems that the KDKBDREP ioctl is not available on this platform.

  However, Linux/SPARC has its own ioctl for this (since 2.1.30),

  with yet another measurement system.  Thus, try for KIOCSRATE, too.

*/

#include "config.h"

#include <fcntl.h>

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <errno.h>

#include <sys/file.h>

#include <sys/ioctl.h>

#include <linux/kd.h>

#ifdef __sparc__

#include <asm/param.h>

#endif

#ifdef COMPAT_HEADERS

#include "compat/linux-kd.h"

#endif

/* Equal to kernel version, but field names vary. */

struct my_kbd_repeat {

	int delay;  /* in msec; <= 0: don't change */

	int period; /* in msec; <= 0: don't change */

	            /* earlier this field was misnamed "rate" */

};

#include <signal.h>

#include "nls.h"

#include "version.h"

#include "kbd_error.h"

static int valid_rates[] = { 300, 267, 240, 218, 200, 185, 171, 160, 150,

	                     133, 120, 109, 100, 92, 86, 80, 75, 67,

	                     60, 55, 50, 46, 43, 40, 37, 33, 30, 27,

	                     25, 23, 21, 20 };

#define RATE_COUNT (sizeof(valid_rates) / sizeof(int))

static int valid_delays[] = { 250, 500, 750, 1000 };

#define DELAY_COUNT (sizeof(valid_delays) / sizeof(int))

static int

KDKBDREP_ioctl_ok(double rate, int delay, int silent)

{

	/*

	 * This ioctl is defined in <linux/kd.h> but is not

	 * implemented anywhere - must be in some m68k patches.

	 * Since 2.4.9 also on i386.

	 */

	struct my_kbd_repeat kbdrep_s;

	/* don't change, just test */

	kbdrep_s.period = -1;

	kbdrep_s.delay  = -1;

	if (ioctl(0, KDKBDREP, &kbdrep_s)) {

		if (errno == EINVAL || errno == ENOTTY)

			return 0;

		kbd_error(EXIT_FAILURE, errno, "ioctl KDKBDREP");

	}

#if 0

	printf("old delay %d, period %d\n",

	       kbdrep_s.delay, kbdrep_s.period);

#endif

	/* do the change */

	if (rate == 0) /* switch repeat off */

		kbdrep_s.period = 0;

	else

		kbdrep_s.period = 1000.0 / rate; /* convert cps to msec */

	if (kbdrep_s.period < 1)

		kbdrep_s.period = 1;

	kbdrep_s.delay          = delay;

	if (kbdrep_s.delay < 1)

		kbdrep_s.delay = 1;

	if (ioctl(0, KDKBDREP, &kbdrep_s)) {

		kbd_error(EXIT_FAILURE, errno, "ioctl KDKBDREP");

	}

	/* report */

	if (kbdrep_s.period == 0)

		rate = 0;

	else

		rate = 1000.0 / (double)kbdrep_s.period;

	if (!silent)

		printf(_("Typematic Rate set to %.1f cps (delay = %d ms)\n"),

		       rate, kbdrep_s.delay);

	kbdrep_s.period = -1;

	kbdrep_s.delay  = -1;

	if (ioctl(0, KDKBDREP, &kbdrep_s)) {

		if (errno == EINVAL)

			return 0;

		kbd_error(EXIT_FAILURE, errno, "ioctl KDKBDREP");

	}

	printf("old delay %d, period %d\n",

	       kbdrep_s.delay, kbdrep_s.period);

	if (kbdrep_s.period == 0)

		rate = 0;

	else

		rate = 1000.0 / (double)kbdrep_s.period;

	if (!silent)

		printf(_("Typematic Rate set to %.1f cps (delay = %d ms)\n"),

		       rate, kbdrep_s.delay);

	return 1; /* success! */

}

#ifndef KIOCSRATE

#define arg_state __attribute__((unused))

#else

#define arg_state

#endif

static int

KIOCSRATE_ioctl_ok(arg_state double rate, arg_state int delay, arg_state int silent)

{

#ifdef KIOCSRATE

	struct kbd_rate kbdrate_s;

	int fd;

	fd = open("/dev/kbd", O_RDONLY);

	if (fd == -1) {

		kbd_error(EXIT_FAILURE, errno, "open /dev/kbd");

	}

	kbdrate_s.rate  = (int)(rate + 0.5); /* round up */

	kbdrate_s.delay = delay * HZ / 1000; /* convert ms to Hz */

	if (kbdrate_s.rate > 50)

		kbdrate_s.rate = 50;

	if (ioctl(fd, KIOCSRATE, &kbdrate_s)) {

		kbd_error(EXIT_FAILURE, errno, "ioctl KIOCSRATE");

	}

	close(fd);

	if (!silent)

		printf("Typematic Rate set to %d cps (delay = %d ms)\n",

		       kbdrate_s.rate, kbdrate_s.delay * 1000 / HZ);

	return 1;

#else  /* no KIOCSRATE */

	return 0;

#endif /* KIOCSRATE */

}

static void

sigalrmhandler(int sig __attribute__((unused)))

{

	kbd_warning(0, "Failed waiting for kbd controller!\n");

	raise(SIGINT);

}

int main(int argc, char **argv)

{

#ifdef __sparc__

	double rate = 5.0; /* Default rate */

	int delay   = 200; /* Default delay */

#else

	double rate = 10.9; /* Default rate */

	int delay   = 250; /* Default delay */

#endif

	int value = 0x7f; /* Maximum delay with slowest rate */

	                  /* DO NOT CHANGE this value */

	int silent = 0;

	int fd;

	char data;

	int c;

	unsigned int i;

	extern char *optarg;

	set_progname(argv[0]);

	setlocale(LC_ALL, "");

	bindtextdomain(PACKAGE_NAME, LOCALEDIR);

	textdomain(PACKAGE_NAME);

	if (argc == 2 &&

	    (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version")))

		print_version_and_exit();

	while ((c = getopt(argc, argv, "r:d:s")) != EOF) {

		switch (c) {

			case 'r':

				rate = atof(optarg);

				break;

			case 'd':

				delay = atoi(optarg);

				break;

			case 's':

				silent = 1;

				break;

			default:

				fprintf(stderr,

				        _("Usage: kbdrate [-V | --version] [-s] [-r rate] [-d delay]\n"));

				exit(EXIT_FAILURE);

		}

	}

	if (KDKBDREP_ioctl_ok(rate, delay, silent)) /* m68k? */

		return 0;

	if (KIOCSRATE_ioctl_ok(rate, delay, silent)) /* sparc? */

		return 0;

	/* The ioport way */

	for (i = 0; i < RATE_COUNT; i++)

		if (rate * 10 >= valid_rates[i]) {

			value &= 0x60;

			value |= i;

			break;

		}

	for (i = 0; i < DELAY_COUNT; i++)

		if (delay <= valid_delays[i]) {

			value &= 0x1f;

			value |= i << 5;

			break;

		}

	if ((fd = open("/dev/port", O_RDWR)) < 0) {

		kbd_error(EXIT_FAILURE, errno, _("Cannot open /dev/port"));

	}

	signal(SIGALRM, sigalrmhandler);

	alarm(3);

	do {

		lseek(fd, 0x64, 0);

		if (read(fd, &data, 1) == -1) {

			kbd_error(EXIT_FAILURE, errno, "read");

		}

	} while ((data & 2) == 2); /* wait */

	lseek(fd, 0x60, 0);

	data = 0xf3; /* set typematic rate */

	if (write(fd, &data, 1) == -1) {

		kbd_error(EXIT_FAILURE, errno, "write");

	}

	do {

		lseek(fd, 0x64, 0);

		if (read(fd, &data, 1) == -1) {

			kbd_error(EXIT_FAILURE, errno, "read");

		}

	} while ((data & 2) == 2); /* wait */

	alarm(0);

	lseek(fd, 0x60, 0);

	sleep(1);

	if (write(fd, &value, 1) == -1) {

		kbd_error(EXIT_FAILURE, errno, "write");

	}

	close(fd);

	if (!silent)

		printf(_("Typematic Rate set to %.1f cps (delay = %d ms)\n"),

		       valid_rates[value & 0x1f] / 10.0,

		       valid_delays[(value & 0x60) >> 5]);

	return EXIT_SUCCESS;

}