FreeBSD-5.3/sys/dev/kbd/atkbd.c
/*-
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer as
* the first lines of this file unmodified.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/kbd/atkbd.c,v 1.43 2004/06/10 20:30:56 jhb Exp $");
#include "opt_kbd.h"
#include "opt_atkbd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/proc.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/resource.h>
#ifdef __i386__
#include <machine/md_var.h>
#include <machine/psl.h>
#include <machine/vm86.h>
#include <machine/pc/bios.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_param.h>
#endif /* __i386__ */
#include <sys/kbio.h>
#include <dev/kbd/kbdreg.h>
#include <dev/kbd/atkbdreg.h>
#include <dev/kbd/atkbdcreg.h>
#include <isa/isareg.h>
static timeout_t atkbd_timeout;
int
atkbd_probe_unit(int unit, int ctlr, int irq, int flags)
{
keyboard_switch_t *sw;
int args[2];
int error;
sw = kbd_get_switch(ATKBD_DRIVER_NAME);
if (sw == NULL)
return ENXIO;
args[0] = ctlr;
args[1] = irq;
error = (*sw->probe)(unit, args, flags);
if (error)
return error;
return 0;
}
int
atkbd_attach_unit(int unit, keyboard_t **kbd, int ctlr, int irq, int flags)
{
keyboard_switch_t *sw;
int args[2];
int error;
sw = kbd_get_switch(ATKBD_DRIVER_NAME);
if (sw == NULL)
return ENXIO;
/* reset, initialize and enable the device */
args[0] = ctlr;
args[1] = irq;
*kbd = NULL;
error = (*sw->probe)(unit, args, flags);
if (error)
return error;
error = (*sw->init)(unit, kbd, args, flags);
if (error)
return error;
(*sw->enable)(*kbd);
#ifdef KBD_INSTALL_CDEV
/* attach a virtual keyboard cdev */
error = kbd_attach(*kbd);
if (error)
return error;
#endif
/*
* This is a kludge to compensate for lost keyboard interrupts.
* A similar code used to be in syscons. See below. XXX
*/
atkbd_timeout(*kbd);
if (bootverbose)
(*sw->diag)(*kbd, bootverbose);
return 0;
}
static void
atkbd_timeout(void *arg)
{
keyboard_t *kbd;
int s;
/*
* The original text of the following comments are extracted
* from syscons.c (1.287)
*
* With release 2.1 of the Xaccel server, the keyboard is left
* hanging pretty often. Apparently an interrupt from the
* keyboard is lost, and I don't know why (yet).
* This ugly hack calls the low-level interrupt routine if input
* is ready for the keyboard and conveniently hides the problem. XXX
*
* Try removing anything stuck in the keyboard controller; whether
* it's a keyboard scan code or mouse data. The low-level
* interrupt routine doesn't read the mouse data directly,
* but the keyboard controller driver will, as a side effect.
*/
/*
* And here is bde's original comment about this:
*
* This is necessary to handle edge triggered interrupts - if we
* returned when our IRQ is high due to unserviced input, then there
* would be no more keyboard IRQs until the keyboard is reset by
* external powers.
*
* The keyboard apparently unwedges the irq in most cases.
*/
s = spltty();
kbd = (keyboard_t *)arg;
if ((*kbdsw[kbd->kb_index]->lock)(kbd, TRUE)) {
/*
* We have seen the lock flag is not set. Let's reset
* the flag early, otherwise the LED update routine fails
* which may want the lock during the interrupt routine.
*/
(*kbdsw[kbd->kb_index]->lock)(kbd, FALSE);
if ((*kbdsw[kbd->kb_index]->check_char)(kbd))
(*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
}
splx(s);
timeout(atkbd_timeout, arg, hz/10);
}
/* LOW-LEVEL */
#define ATKBD_DEFAULT 0
typedef struct atkbd_state {
KBDC kbdc; /* keyboard controller */
/* XXX: don't move this field; pcvt
* expects `kbdc' to be the first
* field in this structure. */
int ks_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */
int ks_flags; /* flags */
#define COMPOSE (1 << 0)
int ks_polling;
int ks_state; /* shift/lock key state */
int ks_accents; /* accent key index (> 0) */
u_int ks_composed_char; /* composed char code (> 0) */
u_char ks_prefix; /* AT scan code prefix */
} atkbd_state_t;
/* keyboard driver declaration */
static int atkbd_configure(int flags);
static kbd_probe_t atkbd_probe;
static kbd_init_t atkbd_init;
static kbd_term_t atkbd_term;
static kbd_intr_t atkbd_intr;
static kbd_test_if_t atkbd_test_if;
static kbd_enable_t atkbd_enable;
static kbd_disable_t atkbd_disable;
static kbd_read_t atkbd_read;
static kbd_check_t atkbd_check;
static kbd_read_char_t atkbd_read_char;
static kbd_check_char_t atkbd_check_char;
static kbd_ioctl_t atkbd_ioctl;
static kbd_lock_t atkbd_lock;
static kbd_clear_state_t atkbd_clear_state;
static kbd_get_state_t atkbd_get_state;
static kbd_set_state_t atkbd_set_state;
static kbd_poll_mode_t atkbd_poll;
static keyboard_switch_t atkbdsw = {
atkbd_probe,
atkbd_init,
atkbd_term,
atkbd_intr,
atkbd_test_if,
atkbd_enable,
atkbd_disable,
atkbd_read,
atkbd_check,
atkbd_read_char,
atkbd_check_char,
atkbd_ioctl,
atkbd_lock,
atkbd_clear_state,
atkbd_get_state,
atkbd_set_state,
genkbd_get_fkeystr,
atkbd_poll,
genkbd_diag,
};
KEYBOARD_DRIVER(atkbd, atkbdsw, atkbd_configure);
/* local functions */
static int get_typematic(keyboard_t *kbd);
static int setup_kbd_port(KBDC kbdc, int port, int intr);
static int get_kbd_echo(KBDC kbdc);
static int probe_keyboard(KBDC kbdc, int flags);
static int init_keyboard(KBDC kbdc, int *type, int flags);
static int write_kbd(KBDC kbdc, int command, int data);
static int get_kbd_id(KBDC kbdc);
static int typematic(int delay, int rate);
static int typematic_delay(int delay);
static int typematic_rate(int rate);
/* local variables */
/* the initial key map, accent map and fkey strings */
#ifdef ATKBD_DFLT_KEYMAP
#define KBD_DFLT_KEYMAP
#include "atkbdmap.h"
#endif
#include <dev/kbd/kbdtables.h>
/* structures for the default keyboard */
static keyboard_t default_kbd;
static atkbd_state_t default_kbd_state;
static keymap_t default_keymap;
static accentmap_t default_accentmap;
static fkeytab_t default_fkeytab[NUM_FKEYS];
/*
* The back door to the keyboard driver!
* This function is called by the console driver, via the kbdio module,
* to tickle keyboard drivers when the low-level console is being initialized.
* Almost nothing in the kernel has been initialied yet. Try to probe
* keyboards if possible.
* NOTE: because of the way the low-level console is initialized, this routine
* may be called more than once!!
*/
static int
atkbd_configure(int flags)
{
keyboard_t *kbd;
int arg[2];
int i;
/* probe the keyboard controller */
atkbdc_configure();
/* if the driver is disabled, unregister the keyboard if any */
if (resource_disabled("atkbd", ATKBD_DEFAULT)) {
i = kbd_find_keyboard(ATKBD_DRIVER_NAME, ATKBD_DEFAULT);
if (i >= 0) {
kbd = kbd_get_keyboard(i);
kbd_unregister(kbd);
kbd->kb_flags &= ~KB_REGISTERED;
}
return 0;
}
/* XXX: a kludge to obtain the device configuration flags */
if (resource_int_value("atkbd", ATKBD_DEFAULT, "flags", &i) == 0)
flags |= i;
/* probe the default keyboard */
arg[0] = -1;
arg[1] = -1;
kbd = NULL;
if (atkbd_probe(ATKBD_DEFAULT, arg, flags))
return 0;
if (atkbd_init(ATKBD_DEFAULT, &kbd, arg, flags))
return 0;
/* return the number of found keyboards */
return 1;
}
/* low-level functions */
/* detect a keyboard */
static int
atkbd_probe(int unit, void *arg, int flags)
{
KBDC kbdc;
int *data = (int *)arg; /* data[0]: controller, data[1]: irq */
/* XXX */
if (unit == ATKBD_DEFAULT) {
if (KBD_IS_PROBED(&default_kbd))
return 0;
}
kbdc = atkbdc_open(data[0]);
if (kbdc == NULL)
return ENXIO;
if (probe_keyboard(kbdc, flags)) {
if (flags & KB_CONF_FAIL_IF_NO_KBD)
return ENXIO;
}
return 0;
}
/* reset and initialize the device */
static int
atkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags)
{
keyboard_t *kbd;
atkbd_state_t *state;
keymap_t *keymap;
accentmap_t *accmap;
fkeytab_t *fkeymap;
int fkeymap_size;
int delay[2];
int *data = (int *)arg; /* data[0]: controller, data[1]: irq */
/* XXX */
if (unit == ATKBD_DEFAULT) {
*kbdp = kbd = &default_kbd;
if (KBD_IS_INITIALIZED(kbd) && KBD_IS_CONFIGURED(kbd))
return 0;
state = &default_kbd_state;
keymap = &default_keymap;
accmap = &default_accentmap;
fkeymap = default_fkeytab;
fkeymap_size =
sizeof(default_fkeytab)/sizeof(default_fkeytab[0]);
} else if (*kbdp == NULL) {
*kbdp = kbd = malloc(sizeof(*kbd), M_DEVBUF, M_NOWAIT | M_ZERO);
state = malloc(sizeof(*state), M_DEVBUF, M_NOWAIT | M_ZERO);
keymap = malloc(sizeof(key_map), M_DEVBUF, M_NOWAIT);
accmap = malloc(sizeof(accent_map), M_DEVBUF, M_NOWAIT);
fkeymap = malloc(sizeof(fkey_tab), M_DEVBUF, M_NOWAIT);
fkeymap_size = sizeof(fkey_tab)/sizeof(fkey_tab[0]);
if ((kbd == NULL) || (state == NULL) || (keymap == NULL)
|| (accmap == NULL) || (fkeymap == NULL)) {
if (state != NULL)
free(state, M_DEVBUF);
if (keymap != NULL)
free(keymap, M_DEVBUF);
if (accmap != NULL)
free(accmap, M_DEVBUF);
if (fkeymap != NULL)
free(fkeymap, M_DEVBUF);
if (kbd != NULL)
free(kbd, M_DEVBUF);
return ENOMEM;
}
} else if (KBD_IS_INITIALIZED(*kbdp) && KBD_IS_CONFIGURED(*kbdp)) {
return 0;
} else {
kbd = *kbdp;
state = (atkbd_state_t *)kbd->kb_data;
bzero(state, sizeof(*state));
keymap = kbd->kb_keymap;
accmap = kbd->kb_accentmap;
fkeymap = kbd->kb_fkeytab;
fkeymap_size = kbd->kb_fkeytab_size;
}
if (!KBD_IS_PROBED(kbd)) {
state->kbdc = atkbdc_open(data[0]);
if (state->kbdc == NULL)
return ENXIO;
kbd_init_struct(kbd, ATKBD_DRIVER_NAME, KB_OTHER, unit, flags,
0, 0);
bcopy(&key_map, keymap, sizeof(key_map));
bcopy(&accent_map, accmap, sizeof(accent_map));
bcopy(fkey_tab, fkeymap,
imin(fkeymap_size*sizeof(fkeymap[0]), sizeof(fkey_tab)));
kbd_set_maps(kbd, keymap, accmap, fkeymap, fkeymap_size);
kbd->kb_data = (void *)state;
if (probe_keyboard(state->kbdc, flags)) { /* shouldn't happen */
if (flags & KB_CONF_FAIL_IF_NO_KBD)
return ENXIO;
} else {
KBD_FOUND_DEVICE(kbd);
}
atkbd_clear_state(kbd);
state->ks_mode = K_XLATE;
/*
* FIXME: set the initial value for lock keys in ks_state
* according to the BIOS data?
*/
KBD_PROBE_DONE(kbd);
}
if (!KBD_IS_INITIALIZED(kbd) && !(flags & KB_CONF_PROBE_ONLY)) {
kbd->kb_config = flags & ~KB_CONF_PROBE_ONLY;
if (KBD_HAS_DEVICE(kbd)
&& init_keyboard(state->kbdc, &kbd->kb_type, kbd->kb_config)
&& (kbd->kb_config & KB_CONF_FAIL_IF_NO_KBD)) {
kbd_unregister(kbd);
return ENXIO;
}
atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state);
get_typematic(kbd);
delay[0] = kbd->kb_delay1;
delay[1] = kbd->kb_delay2;
atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay);
KBD_INIT_DONE(kbd);
}
if (!KBD_IS_CONFIGURED(kbd)) {
if (kbd_register(kbd) < 0)
return ENXIO;
KBD_CONFIG_DONE(kbd);
}
return 0;
}
/* finish using this keyboard */
static int
atkbd_term(keyboard_t *kbd)
{
kbd_unregister(kbd);
return 0;
}
/* keyboard interrupt routine */
static int
atkbd_intr(keyboard_t *kbd, void *arg)
{
atkbd_state_t *state;
int delay[2];
int c;
if (KBD_IS_ACTIVE(kbd) && KBD_IS_BUSY(kbd)) {
/* let the callback function to process the input */
(*kbd->kb_callback.kc_func)(kbd, KBDIO_KEYINPUT,
kbd->kb_callback.kc_arg);
} else {
/* read and discard the input; no one is waiting for input */
do {
c = atkbd_read_char(kbd, FALSE);
} while (c != NOKEY);
if (!KBD_HAS_DEVICE(kbd)) {
/*
* The keyboard was not detected before;
* it must have been reconnected!
*/
state = (atkbd_state_t *)kbd->kb_data;
init_keyboard(state->kbdc, &kbd->kb_type,
kbd->kb_config);
atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state);
get_typematic(kbd);
delay[0] = kbd->kb_delay1;
delay[1] = kbd->kb_delay2;
atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay);
KBD_FOUND_DEVICE(kbd);
}
}
return 0;
}
/* test the interface to the device */
static int
atkbd_test_if(keyboard_t *kbd)
{
int error;
int s;
error = 0;
empty_both_buffers(((atkbd_state_t *)kbd->kb_data)->kbdc, 10);
s = spltty();
if (!test_controller(((atkbd_state_t *)kbd->kb_data)->kbdc))
error = EIO;
else if (test_kbd_port(((atkbd_state_t *)kbd->kb_data)->kbdc) != 0)
error = EIO;
splx(s);
return error;
}
/*
* Enable the access to the device; until this function is called,
* the client cannot read from the keyboard.
*/
static int
atkbd_enable(keyboard_t *kbd)
{
int s;
s = spltty();
KBD_ACTIVATE(kbd);
splx(s);
return 0;
}
/* disallow the access to the device */
static int
atkbd_disable(keyboard_t *kbd)
{
int s;
s = spltty();
KBD_DEACTIVATE(kbd);
splx(s);
return 0;
}
/* read one byte from the keyboard if it's allowed */
static int
atkbd_read(keyboard_t *kbd, int wait)
{
int c;
if (wait)
c = read_kbd_data(((atkbd_state_t *)kbd->kb_data)->kbdc);
else
c = read_kbd_data_no_wait(((atkbd_state_t *)kbd->kb_data)->kbdc);
if (c != -1)
++kbd->kb_count;
return (KBD_IS_ACTIVE(kbd) ? c : -1);
}
/* check if data is waiting */
static int
atkbd_check(keyboard_t *kbd)
{
if (!KBD_IS_ACTIVE(kbd))
return FALSE;
return kbdc_data_ready(((atkbd_state_t *)kbd->kb_data)->kbdc);
}
/* read char from the keyboard */
static u_int
atkbd_read_char(keyboard_t *kbd, int wait)
{
atkbd_state_t *state;
u_int action;
int scancode;
int keycode;
state = (atkbd_state_t *)kbd->kb_data;
next_code:
/* do we have a composed char to return? */
if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) {
action = state->ks_composed_char;
state->ks_composed_char = 0;
if (action > UCHAR_MAX)
return ERRKEY;
return action;
}
/* see if there is something in the keyboard port */
if (wait) {
do {
scancode = read_kbd_data(state->kbdc);
} while (scancode == -1);
} else {
scancode = read_kbd_data_no_wait(state->kbdc);
if (scancode == -1)
return NOKEY;
}
++kbd->kb_count;
#if KBDIO_DEBUG >= 10
printf("atkbd_read_char(): scancode:0x%x\n", scancode);
#endif
/* return the byte as is for the K_RAW mode */
if (state->ks_mode == K_RAW)
return scancode;
/* translate the scan code into a keycode */
keycode = scancode & 0x7F;
switch (state->ks_prefix) {
case 0x00: /* normal scancode */
switch(scancode) {
case 0xB8: /* left alt (compose key) released */
if (state->ks_flags & COMPOSE) {
state->ks_flags &= ~COMPOSE;
if (state->ks_composed_char > UCHAR_MAX)
state->ks_composed_char = 0;
}
break;
case 0x38: /* left alt (compose key) pressed */
if (!(state->ks_flags & COMPOSE)) {
state->ks_flags |= COMPOSE;
state->ks_composed_char = 0;
}
break;
case 0xE0:
case 0xE1:
state->ks_prefix = scancode;
goto next_code;
}
break;
case 0xE0: /* 0xE0 prefix */
state->ks_prefix = 0;
switch (keycode) {
case 0x1C: /* right enter key */
keycode = 0x59;
break;
case 0x1D: /* right ctrl key */
keycode = 0x5A;
break;
case 0x35: /* keypad divide key */
keycode = 0x5B;
break;
case 0x37: /* print scrn key */
keycode = 0x5C;
break;
case 0x38: /* right alt key (alt gr) */
keycode = 0x5D;
break;
case 0x46: /* ctrl-pause/break on AT 101 (see below) */
keycode = 0x68;
break;
case 0x47: /* grey home key */
keycode = 0x5E;
break;
case 0x48: /* grey up arrow key */
keycode = 0x5F;
break;
case 0x49: /* grey page up key */
keycode = 0x60;
break;
case 0x4B: /* grey left arrow key */
keycode = 0x61;
break;
case 0x4D: /* grey right arrow key */
keycode = 0x62;
break;
case 0x4F: /* grey end key */
keycode = 0x63;
break;
case 0x50: /* grey down arrow key */
keycode = 0x64;
break;
case 0x51: /* grey page down key */
keycode = 0x65;
break;
case 0x52: /* grey insert key */
keycode = 0x66;
break;
case 0x53: /* grey delete key */
keycode = 0x67;
break;
/* the following 3 are only used on the MS "Natural" keyboard */
case 0x5b: /* left Window key */
keycode = 0x69;
break;
case 0x5c: /* right Window key */
keycode = 0x6a;
break;
case 0x5d: /* menu key */
keycode = 0x6b;
break;
case 0x5e: /* power key */
keycode = 0x6d;
break;
case 0x5f: /* sleep key */
keycode = 0x6e;
break;
case 0x63: /* wake key */
keycode = 0x6f;
break;
default: /* ignore everything else */
goto next_code;
}
break;
case 0xE1: /* 0xE1 prefix */
/*
* The pause/break key on the 101 keyboard produces:
* E1-1D-45 E1-9D-C5
* Ctrl-pause/break produces:
* E0-46 E0-C6 (See above.)
*/
state->ks_prefix = 0;
if (keycode == 0x1D)
state->ks_prefix = 0x1D;
goto next_code;
/* NOT REACHED */
case 0x1D: /* pause / break */
state->ks_prefix = 0;
if (keycode != 0x45)
goto next_code;
keycode = 0x68;
break;
}
if (kbd->kb_type == KB_84) {
switch (keycode) {
case 0x37: /* *(numpad)/print screen */
if (state->ks_flags & SHIFTS)
keycode = 0x5c; /* print screen */
break;
case 0x45: /* num lock/pause */
if (state->ks_flags & CTLS)
keycode = 0x68; /* pause */
break;
case 0x46: /* scroll lock/break */
if (state->ks_flags & CTLS)
keycode = 0x6c; /* break */
break;
}
} else if (kbd->kb_type == KB_101) {
switch (keycode) {
case 0x5c: /* print screen */
if (state->ks_flags & ALTS)
keycode = 0x54; /* sysrq */
break;
case 0x68: /* pause/break */
if (state->ks_flags & CTLS)
keycode = 0x6c; /* break */
break;
}
}
/* return the key code in the K_CODE mode */
if (state->ks_mode == K_CODE)
return (keycode | (scancode & 0x80));
/* compose a character code */
if (state->ks_flags & COMPOSE) {
switch (keycode | (scancode & 0x80)) {
/* key pressed, process it */
case 0x47: case 0x48: case 0x49: /* keypad 7,8,9 */
state->ks_composed_char *= 10;
state->ks_composed_char += keycode - 0x40;
if (state->ks_composed_char > UCHAR_MAX)
return ERRKEY;
goto next_code;
case 0x4B: case 0x4C: case 0x4D: /* keypad 4,5,6 */
state->ks_composed_char *= 10;
state->ks_composed_char += keycode - 0x47;
if (state->ks_composed_char > UCHAR_MAX)
return ERRKEY;
goto next_code;
case 0x4F: case 0x50: case 0x51: /* keypad 1,2,3 */
state->ks_composed_char *= 10;
state->ks_composed_char += keycode - 0x4E;
if (state->ks_composed_char > UCHAR_MAX)
return ERRKEY;
goto next_code;
case 0x52: /* keypad 0 */
state->ks_composed_char *= 10;
if (state->ks_composed_char > UCHAR_MAX)
return ERRKEY;
goto next_code;
/* key released, no interest here */
case 0xC7: case 0xC8: case 0xC9: /* keypad 7,8,9 */
case 0xCB: case 0xCC: case 0xCD: /* keypad 4,5,6 */
case 0xCF: case 0xD0: case 0xD1: /* keypad 1,2,3 */
case 0xD2: /* keypad 0 */
goto next_code;
case 0x38: /* left alt key */
break;
default:
if (state->ks_composed_char > 0) {
state->ks_flags &= ~COMPOSE;
state->ks_composed_char = 0;
return ERRKEY;
}
break;
}
}
/* keycode to key action */
action = genkbd_keyaction(kbd, keycode, scancode & 0x80,
&state->ks_state, &state->ks_accents);
if (action == NOKEY)
goto next_code;
else
return action;
}
/* check if char is waiting */
static int
atkbd_check_char(keyboard_t *kbd)
{
atkbd_state_t *state;
if (!KBD_IS_ACTIVE(kbd))
return FALSE;
state = (atkbd_state_t *)kbd->kb_data;
if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0))
return TRUE;
return kbdc_data_ready(state->kbdc);
}
/* some useful control functions */
static int
atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
{
/* trasnlate LED_XXX bits into the device specific bits */
static u_char ledmap[8] = {
0, 4, 2, 6, 1, 5, 3, 7,
};
atkbd_state_t *state = kbd->kb_data;
int error;
int s;
int i;
s = spltty();
switch (cmd) {
case KDGKBMODE: /* get keyboard mode */
*(int *)arg = state->ks_mode;
break;
case KDSKBMODE: /* set keyboard mode */
switch (*(int *)arg) {
case K_XLATE:
if (state->ks_mode != K_XLATE) {
/* make lock key state and LED state match */
state->ks_state &= ~LOCK_MASK;
state->ks_state |= KBD_LED_VAL(kbd);
}
/* FALLTHROUGH */
case K_RAW:
case K_CODE:
if (state->ks_mode != *(int *)arg) {
atkbd_clear_state(kbd);
state->ks_mode = *(int *)arg;
}
break;
default:
splx(s);
return EINVAL;
}
break;
case KDGETLED: /* get keyboard LED */
*(int *)arg = KBD_LED_VAL(kbd);
break;
case KDSETLED: /* set keyboard LED */
/* NOTE: lock key state in ks_state won't be changed */
if (*(int *)arg & ~LOCK_MASK) {
splx(s);
return EINVAL;
}
i = *(int *)arg;
/* replace CAPS LED with ALTGR LED for ALTGR keyboards */
if (state->ks_mode == K_XLATE &&
kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
if (i & ALKED)
i |= CLKED;
else
i &= ~CLKED;
}
if (KBD_HAS_DEVICE(kbd)) {
error = write_kbd(state->kbdc, KBDC_SET_LEDS,
ledmap[i & LED_MASK]);
if (error) {
splx(s);
return error;
}
}
KBD_LED_VAL(kbd) = *(int *)arg;
break;
case KDGKBSTATE: /* get lock key state */
*(int *)arg = state->ks_state & LOCK_MASK;
break;
case KDSKBSTATE: /* set lock key state */
if (*(int *)arg & ~LOCK_MASK) {
splx(s);
return EINVAL;
}
state->ks_state &= ~LOCK_MASK;
state->ks_state |= *(int *)arg;
splx(s);
/* set LEDs and quit */
return atkbd_ioctl(kbd, KDSETLED, arg);
case KDSETREPEAT: /* set keyboard repeat rate (new interface) */
splx(s);
if (!KBD_HAS_DEVICE(kbd))
return 0;
i = typematic(((int *)arg)[0], ((int *)arg)[1]);
error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, i);
if (error == 0) {
kbd->kb_delay1 = typematic_delay(i);
kbd->kb_delay2 = typematic_rate(i);
}
return error;
case KDSETRAD: /* set keyboard repeat rate (old interface) */
splx(s);
if (!KBD_HAS_DEVICE(kbd))
return 0;
error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, *(int *)arg);
if (error == 0) {
kbd->kb_delay1 = typematic_delay(*(int *)arg);
kbd->kb_delay2 = typematic_rate(*(int *)arg);
}
return error;
case PIO_KEYMAP: /* set keyboard translation table */
case PIO_KEYMAPENT: /* set keyboard translation table entry */
case PIO_DEADKEYMAP: /* set accent key translation table */
state->ks_accents = 0;
/* FALLTHROUGH */
default:
splx(s);
return genkbd_commonioctl(kbd, cmd, arg);
}
splx(s);
return 0;
}
/* lock the access to the keyboard */
static int
atkbd_lock(keyboard_t *kbd, int lock)
{
return kbdc_lock(((atkbd_state_t *)kbd->kb_data)->kbdc, lock);
}
/* clear the internal state of the keyboard */
static void
atkbd_clear_state(keyboard_t *kbd)
{
atkbd_state_t *state;
state = (atkbd_state_t *)kbd->kb_data;
state->ks_flags = 0;
state->ks_polling = 0;
state->ks_state &= LOCK_MASK; /* preserve locking key state */
state->ks_accents = 0;
state->ks_composed_char = 0;
#if 0
state->ks_prefix = 0; /* XXX */
#endif
}
/* save the internal state */
static int
atkbd_get_state(keyboard_t *kbd, void *buf, size_t len)
{
if (len == 0)
return sizeof(atkbd_state_t);
if (len < sizeof(atkbd_state_t))
return -1;
bcopy(kbd->kb_data, buf, sizeof(atkbd_state_t));
return 0;
}
/* set the internal state */
static int
atkbd_set_state(keyboard_t *kbd, void *buf, size_t len)
{
if (len < sizeof(atkbd_state_t))
return ENOMEM;
if (((atkbd_state_t *)kbd->kb_data)->kbdc
!= ((atkbd_state_t *)buf)->kbdc)
return ENOMEM;
bcopy(buf, kbd->kb_data, sizeof(atkbd_state_t));
return 0;
}
static int
atkbd_poll(keyboard_t *kbd, int on)
{
atkbd_state_t *state;
int s;
state = (atkbd_state_t *)kbd->kb_data;
s = spltty();
if (on)
++state->ks_polling;
else
--state->ks_polling;
splx(s);
return 0;
}
/* local functions */
static int
get_typematic(keyboard_t *kbd)
{
#ifdef __i386__
/*
* Only some systems allow us to retrieve the keyboard repeat
* rate previously set via the BIOS...
*/
struct vm86frame vmf;
u_int32_t p;
bzero(&vmf, sizeof(vmf));
vmf.vmf_ax = 0xc000;
vm86_intcall(0x15, &vmf);
if ((vmf.vmf_eflags & PSL_C) || vmf.vmf_ah)
return ENODEV;
p = BIOS_PADDRTOVADDR(((u_int32_t)vmf.vmf_es << 4) + vmf.vmf_bx);
if ((readb(p + 6) & 0x40) == 0) /* int 16, function 0x09 supported? */
return ENODEV;
vmf.vmf_ax = 0x0900;
vm86_intcall(0x16, &vmf);
if ((vmf.vmf_al & 0x08) == 0) /* int 16, function 0x0306 supported? */
return ENODEV;
vmf.vmf_ax = 0x0306;
vm86_intcall(0x16, &vmf);
kbd->kb_delay1 = typematic_delay(vmf.vmf_bh << 5);
kbd->kb_delay2 = typematic_rate(vmf.vmf_bl);
return 0;
#else
return ENODEV;
#endif /* __i386__ */
}
static int
setup_kbd_port(KBDC kbdc, int port, int intr)
{
if (!set_controller_command_byte(kbdc,
KBD_KBD_CONTROL_BITS,
((port) ? KBD_ENABLE_KBD_PORT : KBD_DISABLE_KBD_PORT)
| ((intr) ? KBD_ENABLE_KBD_INT : KBD_DISABLE_KBD_INT)))
return 1;
return 0;
}
static int
get_kbd_echo(KBDC kbdc)
{
/* enable the keyboard port, but disable the keyboard intr. */
if (setup_kbd_port(kbdc, TRUE, FALSE))
/* CONTROLLER ERROR: there is very little we can do... */
return ENXIO;
/* see if something is present */
write_kbd_command(kbdc, KBDC_ECHO);
if (read_kbd_data(kbdc) != KBD_ECHO) {
empty_both_buffers(kbdc, 10);
test_controller(kbdc);
test_kbd_port(kbdc);
return ENXIO;
}
/* enable the keyboard port and intr. */
if (setup_kbd_port(kbdc, TRUE, TRUE)) {
/*
* CONTROLLER ERROR
* This is serious; the keyboard intr is left disabled!
*/
return ENXIO;
}
return 0;
}
static int
probe_keyboard(KBDC kbdc, int flags)
{
/*
* Don't try to print anything in this function. The low-level
* console may not have been initialized yet...
*/
int err;
int c;
int m;
if (!kbdc_lock(kbdc, TRUE)) {
/* driver error? */
return ENXIO;
}
/* temporarily block data transmission from the keyboard */
write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT);
/* flush any noise in the buffer */
empty_both_buffers(kbdc, 100);
/* save the current keyboard controller command byte */
m = kbdc_get_device_mask(kbdc) & ~KBD_KBD_CONTROL_BITS;
c = get_controller_command_byte(kbdc);
if (c == -1) {
/* CONTROLLER ERROR */
kbdc_set_device_mask(kbdc, m);
kbdc_lock(kbdc, FALSE);
return ENXIO;
}
/*
* The keyboard may have been screwed up by the boot block.
* We may just be able to recover from error by testing the controller
* and the keyboard port. The controller command byte needs to be
* saved before this recovery operation, as some controllers seem
* to set the command byte to particular values.
*/
test_controller(kbdc);
test_kbd_port(kbdc);
err = get_kbd_echo(kbdc);
/*
* Even if the keyboard doesn't seem to be present (err != 0),
* we shall enable the keyboard port and interrupt so that
* the driver will be operable when the keyboard is attached
* to the system later. It is NOT recommended to hot-plug
* the AT keyboard, but many people do so...
*/
kbdc_set_device_mask(kbdc, m | KBD_KBD_CONTROL_BITS);
setup_kbd_port(kbdc, TRUE, TRUE);
#if 0
if (err == 0) {
kbdc_set_device_mask(kbdc, m | KBD_KBD_CONTROL_BITS);
} else {
/* try to restore the command byte as before */
set_controller_command_byte(kbdc, 0xff, c);
kbdc_set_device_mask(kbdc, m);
}
#endif
kbdc_lock(kbdc, FALSE);
return err;
}
static int
init_keyboard(KBDC kbdc, int *type, int flags)
{
int codeset;
int id;
int c;
if (!kbdc_lock(kbdc, TRUE)) {
/* driver error? */
return EIO;
}
/* temporarily block data transmission from the keyboard */
write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT);
/* save the current controller command byte */
empty_both_buffers(kbdc, 200);
c = get_controller_command_byte(kbdc);
if (c == -1) {
/* CONTROLLER ERROR */
kbdc_lock(kbdc, FALSE);
printf("atkbd: unable to get the current command byte value.\n");
return EIO;
}
if (bootverbose)
printf("atkbd: the current kbd controller command byte %04x\n",
c);
#if 0
/* override the keyboard lock switch */
c |= KBD_OVERRIDE_KBD_LOCK;
#endif
/* enable the keyboard port, but disable the keyboard intr. */
if (setup_kbd_port(kbdc, TRUE, FALSE)) {
/* CONTROLLER ERROR: there is very little we can do... */
printf("atkbd: unable to set the command byte.\n");
kbdc_lock(kbdc, FALSE);
return EIO;
}
/*
* Check if we have an XT keyboard before we attempt to reset it.
* The procedure assumes that the keyboard and the controller have
* been set up properly by BIOS and have not been messed up
* during the boot process.
*/
codeset = -1;
if (flags & KB_CONF_ALT_SCANCODESET)
/* the user says there is a XT keyboard */
codeset = 1;
#ifdef KBD_DETECT_XT_KEYBOARD
else if ((c & KBD_TRANSLATION) == 0) {
/* SET_SCANCODE_SET is not always supported; ignore error */
if (send_kbd_command_and_data(kbdc, KBDC_SET_SCANCODE_SET, 0)
== KBD_ACK)
codeset = read_kbd_data(kbdc);
}
if (bootverbose)
printf("atkbd: scancode set %d\n", codeset);
#endif /* KBD_DETECT_XT_KEYBOARD */
*type = KB_OTHER;
id = get_kbd_id(kbdc);
switch(id) {
case 0x41ab: /* 101/102/... Enhanced */
case 0x83ab: /* ditto */
case 0x54ab: /* SpaceSaver */
case 0x84ab: /* ditto */
#if 0
case 0x90ab: /* 'G' */
case 0x91ab: /* 'P' */
case 0x92ab: /* 'A' */
#endif
*type = KB_101;
break;
case -1: /* AT 84 keyboard doesn't return ID */
*type = KB_84;
break;
default:
break;
}
if (bootverbose)
printf("atkbd: keyboard ID 0x%x (%d)\n", id, *type);
/* reset keyboard hardware */
if (!(flags & KB_CONF_NO_RESET) && !reset_kbd(kbdc)) {
/*
* KEYBOARD ERROR
* Keyboard reset may fail either because the keyboard
* doen't exist, or because the keyboard doesn't pass
* the self-test, or the keyboard controller on the
* motherboard and the keyboard somehow fail to shake hands.
* It is just possible, particularly in the last case,
* that the keyboard controller may be left in a hung state.
* test_controller() and test_kbd_port() appear to bring
* the keyboard controller back (I don't know why and how,
* though.)
*/
empty_both_buffers(kbdc, 10);
test_controller(kbdc);
test_kbd_port(kbdc);
/*
* We could disable the keyboard port and interrupt... but,
* the keyboard may still exist (see above).
*/
set_controller_command_byte(kbdc, 0xff, c);
kbdc_lock(kbdc, FALSE);
if (bootverbose)
printf("atkbd: failed to reset the keyboard.\n");
return EIO;
}
/*
* Allow us to set the XT_KEYBD flag so that keyboards
* such as those on the IBM ThinkPad laptop computers can be used
* with the standard console driver.
*/
if (codeset == 1) {
if (send_kbd_command_and_data(kbdc,
KBDC_SET_SCANCODE_SET, codeset) == KBD_ACK) {
/* XT kbd doesn't need scan code translation */
c &= ~KBD_TRANSLATION;
} else {
/*
* KEYBOARD ERROR
* The XT kbd isn't usable unless the proper scan
* code set is selected.
*/
set_controller_command_byte(kbdc, 0xff, c);
kbdc_lock(kbdc, FALSE);
printf("atkbd: unable to set the XT keyboard mode.\n");
return EIO;
}
}
#ifdef __alpha__
if (send_kbd_command_and_data(
kbdc, KBDC_SET_SCANCODE_SET, 2) != KBD_ACK) {
printf("atkbd: can't set translation.\n");
}
c |= KBD_TRANSLATION;
#endif
/* enable the keyboard port and intr. */
if (!set_controller_command_byte(kbdc,
KBD_KBD_CONTROL_BITS | KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK,
(c & (KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK))
| KBD_ENABLE_KBD_PORT | KBD_ENABLE_KBD_INT)) {
/*
* CONTROLLER ERROR
* This is serious; we are left with the disabled
* keyboard intr.
*/
set_controller_command_byte(kbdc, 0xff, c);
kbdc_lock(kbdc, FALSE);
printf("atkbd: unable to enable the keyboard port and intr.\n");
return EIO;
}
kbdc_lock(kbdc, FALSE);
return 0;
}
static int
write_kbd(KBDC kbdc, int command, int data)
{
int s;
/* prevent the timeout routine from polling the keyboard */
if (!kbdc_lock(kbdc, TRUE))
return EBUSY;
/* disable the keyboard and mouse interrupt */
s = spltty();
#if 0
c = get_controller_command_byte(kbdc);
if ((c == -1)
|| !set_controller_command_byte(kbdc,
kbdc_get_device_mask(kbdc),
KBD_DISABLE_KBD_PORT | KBD_DISABLE_KBD_INT
| KBD_DISABLE_AUX_PORT | KBD_DISABLE_AUX_INT)) {
/* CONTROLLER ERROR */
kbdc_lock(kbdc, FALSE);
splx(s);
return EIO;
}
/*
* Now that the keyboard controller is told not to generate
* the keyboard and mouse interrupts, call `splx()' to allow
* the other tty interrupts. The clock interrupt may also occur,
* but the timeout routine (`scrn_timer()') will be blocked
* by the lock flag set via `kbdc_lock()'
*/
splx(s);
#endif
if (send_kbd_command_and_data(kbdc, command, data) != KBD_ACK)
send_kbd_command(kbdc, KBDC_ENABLE_KBD);
#if 0
/* restore the interrupts */
if (!set_controller_command_byte(kbdc,
kbdc_get_device_mask(kbdc),
c & (KBD_KBD_CONTROL_BITS | KBD_AUX_CONTROL_BITS))) {
/* CONTROLLER ERROR */
}
#else
splx(s);
#endif
kbdc_lock(kbdc, FALSE);
return 0;
}
static int
get_kbd_id(KBDC kbdc)
{
int id1, id2;
empty_both_buffers(kbdc, 10);
id1 = id2 = -1;
if (send_kbd_command(kbdc, KBDC_SEND_DEV_ID) != KBD_ACK)
return -1;
DELAY(10000); /* 10 msec delay */
id1 = read_kbd_data(kbdc);
if (id1 != -1)
id2 = read_kbd_data(kbdc);
if ((id1 == -1) || (id2 == -1)) {
empty_both_buffers(kbdc, 10);
test_controller(kbdc);
test_kbd_port(kbdc);
return -1;
}
return ((id2 << 8) | id1);
}
static int delays[] = { 250, 500, 750, 1000 };
static int rates[] = { 34, 38, 42, 46, 50, 55, 59, 63,
68, 76, 84, 92, 100, 110, 118, 126,
136, 152, 168, 184, 200, 220, 236, 252,
272, 304, 336, 368, 400, 440, 472, 504 };
static int
typematic_delay(int i)
{
return delays[(i >> 5) & 3];
}
static int
typematic_rate(int i)
{
return rates[i & 0x1f];
}
static int
typematic(int delay, int rate)
{
int value;
int i;
for (i = sizeof(delays)/sizeof(delays[0]) - 1; i > 0; --i) {
if (delay >= delays[i])
break;
}
value = i << 5;
for (i = sizeof(rates)/sizeof(rates[0]) - 1; i > 0; --i) {
if (rate >= rates[i])
break;
}
value |= i;
return value;
}