FreeBSD-5.3/sys/pc98/pc98/pc98kbd.c
/*
* Copyright (c) 1999 FreeBSD(98) port team.
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD: src/sys/pc98/pc98/pc98kbd.c,v 1.27 2004/03/17 17:50:52 njl Exp $
*/
#include "opt_kbd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/kbio.h>
#include <machine/resource.h>
#include <dev/kbd/kbdreg.h>
#include <pc98/pc98/pc98.h>
#include <isa/isavar.h>
#define DRIVER_NAME "pckbd"
/* device configuration flags */
#define KB_CONF_FAIL_IF_NO_KBD (1 << 0) /* don't install if no kbd is found */
static devclass_t pckbd_devclass;
static int pckbdprobe(device_t dev);
static int pckbdattach(device_t dev);
static int pckbdresume(device_t dev);
static void pckbd_isa_intr(void *arg);
static device_method_t pckbd_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, pckbdprobe),
DEVMETHOD(device_attach, pckbdattach),
DEVMETHOD(device_resume, pckbdresume),
{ 0, 0 }
};
static driver_t pckbd_driver = {
DRIVER_NAME,
pckbd_methods,
1,
};
DRIVER_MODULE(pckbd, isa, pckbd_driver, pckbd_devclass, 0, 0);
static bus_addr_t pckbd_iat[] = {0, 2};
static int pckbd_probe_unit(int unit, int port, int irq,
int flags);
static int pckbd_attach_unit(int unit, keyboard_t **kbd,
int port, int irq, int flags);
static timeout_t pckbd_timeout;
static int
pckbdprobe(device_t dev)
{
struct resource *res;
int error, rid;
/* Check isapnp ids */
if (isa_get_vendorid(dev))
return (ENXIO);
device_set_desc(dev, "PC-98 Keyboard");
rid = 0;
res = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, pckbd_iat, 2,
RF_ACTIVE);
if (res == NULL)
return ENXIO;
isa_load_resourcev(res, pckbd_iat, 2);
error = pckbd_probe_unit(device_get_unit(dev),
isa_get_port(dev),
(1 << isa_get_irq(dev)),
device_get_flags(dev));
bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
return (error);
}
static int
pckbdattach(device_t dev)
{
keyboard_t *kbd;
void *ih;
struct resource *res;
int error, rid;
rid = 0;
res = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, pckbd_iat, 2,
RF_ACTIVE);
if (res == NULL)
return ENXIO;
isa_load_resourcev(res, pckbd_iat, 2);
error = pckbd_attach_unit(device_get_unit(dev), &kbd,
isa_get_port(dev),
(1 << isa_get_irq(dev)),
device_get_flags(dev));
rid = 0;
res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
if (res == NULL)
return ENXIO;
BUS_SETUP_INTR(device_get_parent(dev), dev, res, INTR_TYPE_TTY,
pckbd_isa_intr, kbd, &ih);
return 0;
}
static int
pckbdresume(device_t dev)
{
keyboard_t *kbd;
kbd = kbd_get_keyboard(kbd_find_keyboard(DRIVER_NAME,
device_get_unit(dev)));
if (kbd)
(*kbdsw[kbd->kb_index]->clear_state)(kbd);
return (0);
}
static void
pckbd_isa_intr(void *arg)
{
keyboard_t *kbd = arg;
(*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
}
static int
pckbd_probe_unit(int unit, int port, int irq, int flags)
{
keyboard_switch_t *sw;
int args[2];
int error;
sw = kbd_get_switch(DRIVER_NAME);
if (sw == NULL)
return ENXIO;
args[0] = port;
args[1] = irq;
error = (*sw->probe)(unit, args, flags);
if (error)
return error;
return 0;
}
static int
pckbd_attach_unit(int unit, keyboard_t **kbd, int port, int irq, int flags)
{
keyboard_switch_t *sw;
int args[2];
int error;
sw = kbd_get_switch(DRIVER_NAME);
if (sw == NULL)
return ENXIO;
/* reset, initialize and enable the device */
args[0] = port;
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 /* KBD_INSTALL_CDEV */
/*
* This is a kludge to compensate for lost keyboard interrupts.
* A similar code used to be in syscons. See below. XXX
*/
pckbd_timeout(*kbd);
if (bootverbose)
(*sw->diag)(*kbd, bootverbose);
return 0;
}
static void
pckbd_timeout(void *arg)
{
keyboard_t *kbd;
int s;
/* 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 scintr 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. `scintr()' doesn't
* read the mouse data directly, but `kbdio' routines will, as a
* side effect.
*/
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(pckbd_timeout, arg, hz/10);
}
/* LOW-LEVEL */
#include <sys/limits.h>
#define PC98KBD_DEFAULT 0
typedef caddr_t KBDC;
typedef struct pckbd_state {
KBDC kbdc; /* keyboard controller */
int ks_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */
int ks_flags; /* flags */
#define COMPOSE (1 << 0)
int ks_state; /* shift/lock key state */
int ks_accents; /* accent key index (> 0) */
u_int ks_composed_char; /* composed char code (> 0) */
} pckbd_state_t;
/* keyboard driver declaration */
static int pckbd_configure(int flags);
static kbd_probe_t pckbd_probe;
static kbd_init_t pckbd_init;
static kbd_term_t pckbd_term;
static kbd_intr_t pckbd_intr;
static kbd_test_if_t pckbd_test_if;
static kbd_enable_t pckbd_enable;
static kbd_disable_t pckbd_disable;
static kbd_read_t pckbd_read;
static kbd_check_t pckbd_check;
static kbd_read_char_t pckbd_read_char;
static kbd_check_char_t pckbd_check_char;
static kbd_ioctl_t pckbd_ioctl;
static kbd_lock_t pckbd_lock;
static kbd_clear_state_t pckbd_clear_state;
static kbd_get_state_t pckbd_get_state;
static kbd_set_state_t pckbd_set_state;
static kbd_poll_mode_t pckbd_poll;
keyboard_switch_t pckbdsw = {
pckbd_probe,
pckbd_init,
pckbd_term,
pckbd_intr,
pckbd_test_if,
pckbd_enable,
pckbd_disable,
pckbd_read,
pckbd_check,
pckbd_read_char,
pckbd_check_char,
pckbd_ioctl,
pckbd_lock,
pckbd_clear_state,
pckbd_get_state,
pckbd_set_state,
genkbd_get_fkeystr,
pckbd_poll,
genkbd_diag,
};
KEYBOARD_DRIVER(pckbd, pckbdsw, pckbd_configure);
struct kbdc_softc {
int port; /* base port address */
int lock; /* FIXME: XXX not quite a semaphore... */
};
/* local functions */
static int probe_keyboard(KBDC kbdc, int flags);
static int init_keyboard(KBDC kbdc, int *type, int flags);
static KBDC kbdc_open(int port);
static int kbdc_lock(KBDC kbdc, int lock);
static int kbdc_data_ready(KBDC kbdc);
static int read_kbd_data(KBDC kbdc);
static int read_kbd_data_no_wait(KBDC kbdc);
static int wait_for_kbd_data(struct kbdc_softc *kbdc);
/* local variables */
/* the initial key map, accent map and fkey strings */
#include <dev/kbd/kbdtables.h>
/* structures for the default keyboard */
static keyboard_t default_kbd;
static pckbd_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 conole is initialized, this routine
* may be called more than once!!
*/
static int
pckbd_configure(int flags)
{
keyboard_t *kbd;
int arg[2];
int i;
/* XXX: a kludge to obtain the device configuration flags */
if (resource_int_value(DRIVER_NAME, 0, "flags", &i) == 0) {
flags |= i;
/* if the driver is disabled, unregister the keyboard if any */
if (resource_disabled(DRIVER_NAME, 0)) {
i = kbd_find_keyboard(DRIVER_NAME, PC98KBD_DEFAULT);
if (i >= 0) {
kbd = kbd_get_keyboard(i);
kbd_unregister(kbd);
kbd->kb_flags &= ~KB_REGISTERED;
return 0;
}
}
}
/* probe the default keyboard */
arg[0] = -1;
arg[1] = -1;
kbd = NULL;
if (pckbd_probe(PC98KBD_DEFAULT, arg, flags))
return 0;
if (pckbd_init(PC98KBD_DEFAULT, &kbd, arg, flags))
return 0;
/* return the number of found keyboards */
return 1;
}
/* low-level functions */
/* detect a keyboard */
static int
pckbd_probe(int unit, void *arg, int flags)
{
KBDC kbdc;
int *data = (int *)arg;
if (unit != PC98KBD_DEFAULT)
return ENXIO;
if (KBD_IS_PROBED(&default_kbd))
return 0;
kbdc = kbdc_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
pckbd_init(int unit, keyboard_t **kbdp, void *arg, int flags)
{
keyboard_t *kbd;
pckbd_state_t *state;
keymap_t *keymap;
accentmap_t *accmap;
fkeytab_t *fkeymap;
int fkeymap_size;
int *data = (int *)arg;
if (unit != PC98KBD_DEFAULT) /* shouldn't happen */
return ENXIO;
*kbdp = kbd = &default_kbd;
state = &default_kbd_state;
if (!KBD_IS_PROBED(kbd)) {
keymap = &default_keymap;
accmap = &default_accentmap;
fkeymap = default_fkeytab;
fkeymap_size =
sizeof(default_fkeytab)/sizeof(default_fkeytab[0]);
state->kbdc = kbdc_open(data[0]);
if (state->kbdc == NULL)
return ENXIO;
kbd_init_struct(kbd, DRIVER_NAME, KB_OTHER, unit, flags,
data[0], IO_KBDSIZE);
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);
}
pckbd_clear_state(kbd);
state->ks_mode = K_XLATE;
KBD_PROBE_DONE(kbd);
}
if (!KBD_IS_INITIALIZED(kbd) && !(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))
return ENXIO;
pckbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state);
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
pckbd_term(keyboard_t *kbd)
{
kbd_unregister(kbd);
return 0;
}
/* keyboard interrupt routine */
static int
pckbd_intr(keyboard_t *kbd, void *arg)
{
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 = pckbd_read_char(kbd, FALSE);
} while (c != NOKEY);
}
return 0;
}
/* test the interface to the device */
static int
pckbd_test_if(keyboard_t *kbd)
{
return 0;
}
/*
* Enable the access to the device; until this function is called,
* the client cannot read from the keyboard.
*/
static int
pckbd_enable(keyboard_t *kbd)
{
int s;
s = spltty();
KBD_ACTIVATE(kbd);
splx(s);
return 0;
}
/* disallow the access to the device */
static int
pckbd_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
pckbd_read(keyboard_t *kbd, int wait)
{
int c;
if (wait)
c = read_kbd_data(((pckbd_state_t *)kbd->kb_data)->kbdc);
else
c = read_kbd_data_no_wait(((pckbd_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
pckbd_check(keyboard_t *kbd)
{
if (!KBD_IS_ACTIVE(kbd))
return FALSE;
return kbdc_data_ready(((pckbd_state_t *)kbd->kb_data)->kbdc);
}
/* read char from the keyboard */
static u_int
pckbd_read_char(keyboard_t *kbd, int wait)
{
pckbd_state_t *state;
u_int action;
int scancode;
int keycode;
state = (pckbd_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 0
printf("pckbd_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(scancode) {
case 0xF3: /* GRPH (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 0x73: /* GRPH (compose key) pressed */
if (!(state->ks_flags & COMPOSE)) {
state->ks_flags |= COMPOSE;
state->ks_composed_char = 0;
}
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 (scancode) {
/* key pressed, process it */
case 0x42: case 0x43: case 0x44: /* keypad 7,8,9 */
state->ks_composed_char *= 10;
state->ks_composed_char += scancode - 0x3B;
if (state->ks_composed_char > UCHAR_MAX)
return ERRKEY;
goto next_code;
case 0x46: case 0x47: case 0x48: /* keypad 4,5,6 */
state->ks_composed_char *= 10;
state->ks_composed_char += scancode - 0x42;
if (state->ks_composed_char > UCHAR_MAX)
return ERRKEY;
goto next_code;
case 0x4A: case 0x4B: case 0x4C: /* keypad 1,2,3 */
state->ks_composed_char *= 10;
state->ks_composed_char += scancode - 0x49;
if (state->ks_composed_char > UCHAR_MAX)
return ERRKEY;
goto next_code;
case 0x4E: /* 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 0xC2: case 0xC3: case 0xC4: /* keypad 7,8,9 */
case 0xC6: case 0xC7: case 0xC8: /* keypad 4,5,6 */
case 0xCA: case 0xCB: case 0xCC: /* keypad 1,2,3 */
case 0xCE: /* keypad 0 */
goto next_code;
case 0x73: /* GRPH 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
pckbd_check_char(keyboard_t *kbd)
{
pckbd_state_t *state;
if (!KBD_IS_ACTIVE(kbd))
return FALSE;
state = (pckbd_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
pckbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
{
pckbd_state_t *state = kbd->kb_data;
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) {
pckbd_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 (kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
if (i & ALKED)
i |= CLKED;
else
i &= ~CLKED;
}
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 pckbd_ioctl(kbd, KDSETLED, arg);
case KDSETRAD: /* set keyboard repeat rate (old interface)*/
break;
case KDSETREPEAT: /* set keyboard repeat rate (new interface) */
break;
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
pckbd_lock(keyboard_t *kbd, int lock)
{
return kbdc_lock(((pckbd_state_t *)kbd->kb_data)->kbdc, lock);
}
/* clear the internal state of the keyboard */
static void
pckbd_clear_state(keyboard_t *kbd)
{
pckbd_state_t *state;
state = (pckbd_state_t *)kbd->kb_data;
state->ks_flags = 0;
state->ks_state &= LOCK_MASK; /* preserve locking key state */
state->ks_accents = 0;
state->ks_composed_char = 0;
}
/* save the internal state */
static int
pckbd_get_state(keyboard_t *kbd, void *buf, size_t len)
{
if (len == 0)
return sizeof(pckbd_state_t);
if (len < sizeof(pckbd_state_t))
return -1;
bcopy(kbd->kb_data, buf, sizeof(pckbd_state_t));
return 0;
}
/* set the internal state */
static int
pckbd_set_state(keyboard_t *kbd, void *buf, size_t len)
{
if (len < sizeof(pckbd_state_t))
return ENOMEM;
if (((pckbd_state_t *)kbd->kb_data)->kbdc
!= ((pckbd_state_t *)buf)->kbdc)
return ENOMEM;
bcopy(buf, kbd->kb_data, sizeof(pckbd_state_t));
return 0;
}
/* set polling mode */
static int
pckbd_poll(keyboard_t *kbd, int on)
{
return 0;
}
/* local functions */
static int
probe_keyboard(KBDC kbdc, int flags)
{
return 0;
}
static int
init_keyboard(KBDC kbdc, int *type, int flags)
{
*type = KB_OTHER;
return 0;
}
/* keyboard I/O routines */
/* retry count */
#ifndef KBD_MAXRETRY
#define KBD_MAXRETRY 3
#endif
/* timing parameters */
#ifndef KBD_RESETDELAY
#define KBD_RESETDELAY 200 /* wait 200msec after kbd/mouse reset */
#endif
#ifndef KBD_MAXWAIT
#define KBD_MAXWAIT 5 /* wait 5 times at most after reset */
#endif
/* I/O recovery time */
#define KBDC_DELAYTIME 37
#define KBDD_DELAYTIME 37
/* I/O ports */
#define KBD_STATUS_PORT 2 /* status port, read */
#define KBD_DATA_PORT 0 /* data port, read */
/* status bits (KBD_STATUS_PORT) */
#define KBDS_BUFFER_FULL 0x0002
/* macros */
#define kbdcp(p) ((struct kbdc_softc *)(p))
/* local variables */
static struct kbdc_softc kbdc_softc[1] = { { 0 }, };
/* associate a port number with a KBDC */
static KBDC
kbdc_open(int port)
{
if (port <= 0)
port = IO_KBD;
/* PC-98 has only one keyboard I/F */
kbdc_softc[0].port = port;
kbdc_softc[0].lock = FALSE;
return (KBDC)&kbdc_softc[0];
}
/* set/reset polling lock */
static int
kbdc_lock(KBDC p, int lock)
{
int prevlock;
prevlock = kbdcp(p)->lock;
kbdcp(p)->lock = lock;
return (prevlock != lock);
}
/* check if any data is waiting to be processed */
static int
kbdc_data_ready(KBDC p)
{
return (inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL);
}
/* wait for data from the keyboard */
static int
wait_for_kbd_data(struct kbdc_softc *kbdc)
{
/* CPU will stay inside the loop for 200msec at most */
int retry = 10000;
int port = kbdc->port;
while (!(inb(port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL)) {
DELAY(KBDD_DELAYTIME);
DELAY(KBDC_DELAYTIME);
if (--retry < 0)
return 0;
}
DELAY(KBDD_DELAYTIME);
return 1;
}
/* read one byte from the keyboard */
static int
read_kbd_data(KBDC p)
{
if (!wait_for_kbd_data(kbdcp(p)))
return -1; /* timeout */
DELAY(KBDC_DELAYTIME);
return inb(kbdcp(p)->port + KBD_DATA_PORT);
}
/* read one byte from the keyboard, but return immediately if
* no data is waiting
*/
static int
read_kbd_data_no_wait(KBDC p)
{
if (inb(kbdcp(p)->port + KBD_STATUS_PORT) & KBDS_BUFFER_FULL) {
DELAY(KBDD_DELAYTIME);
return inb(kbdcp(p)->port + KBD_DATA_PORT);
}
return -1; /* no data */
}