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freebsd-nq/sys/dev/vkbd/vkbd.c
Maksim Yevmenkin 0722466d60 Disable custom locking in the vkbd(4) for now and make it rely on the 
Giant mutex (just like the rest of keyboard drivers and syscons(4) do).

Tested by:	markus
MFC after:	1 day
2006-02-27 06:17:48 +00:00

1357 lines
32 KiB
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/*
* vkbd.c
*/
/*-
* Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* 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.
* 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 AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $Id: vkbd.c,v 1.20 2004/11/15 23:53:30 max Exp $
* $FreeBSD$
*/
#include "opt_kbd.h"
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/kbio.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/poll.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <sys/selinfo.h>
#include <sys/systm.h>
#include <sys/taskqueue.h>
#include <sys/uio.h>
#include <dev/kbd/kbdreg.h>
#include <dev/kbd/kbdtables.h>
#include <dev/vkbd/vkbd_var.h>
#define DEVICE_NAME "vkbdctl"
#define KEYBOARD_NAME "vkbd"
MALLOC_DECLARE(M_VKBD);
MALLOC_DEFINE(M_VKBD, KEYBOARD_NAME, "Virtual AT keyboard");
/*****************************************************************************
*****************************************************************************
** Keyboard state
*****************************************************************************
*****************************************************************************/
/*
* XXX
* For now rely on Giant mutex to protect our data structures.
* Just like the rest of keyboard drivers and syscons(4) do.
*/
#if 0 /* not yet */
#define VKBD_LOCK_DECL struct mtx ks_lock
#define VKBD_LOCK_INIT(s) mtx_init(&(s)->ks_lock, "vkbd_lock", NULL, MTX_DEF|MTX_RECURSE)
#define VKBD_LOCK_DESTROY(s) mtx_destroy(&(s)->ks_lock)
#define VKBD_LOCK(s) mtx_lock(&(s)->ks_lock)
#define VKBD_UNLOCK(s) mtx_unlock(&(s)->ks_lock)
#define VKBD_LOCK_ASSERT(s, w) mtx_assert(&(s)->ks_lock, w)
#define VKBD_SLEEP(s, f, d, t) \
msleep(&(s)->f, &(s)->ks_lock, PCATCH | (PZERO + 1), d, t)
#else
#define VKBD_LOCK_DECL
#define VKBD_LOCK_INIT(s)
#define VKBD_LOCK_DESTROY(s)
#define VKBD_LOCK(s)
#define VKBD_UNLOCK(s)
#define VKBD_LOCK_ASSERT(s, w)
#define VKBD_SLEEP(s, f, d, t) tsleep(&(s)->f, PCATCH | (PZERO + 1), d, t)
#endif
#define VKBD_KEYBOARD(d) \
kbd_get_keyboard(kbd_find_keyboard(KEYBOARD_NAME, dev2unit(d)))
/* vkbd queue */
struct vkbd_queue
{
int q[VKBD_Q_SIZE]; /* queue */
int head; /* index of the first code */
int tail; /* index of the last code */
int cc; /* number of codes in queue */
};
typedef struct vkbd_queue vkbd_queue_t;
/* vkbd state */
struct vkbd_state
{
struct cdev *ks_dev; /* control device */
struct selinfo ks_rsel; /* select(2) */
struct selinfo ks_wsel;
vkbd_queue_t ks_inq; /* input key codes queue */
struct task ks_task; /* interrupt task */
int ks_flags; /* flags */
#define OPEN (1 << 0) /* control device is open */
#define COMPOSE (1 << 1) /* compose flag */
#define STATUS (1 << 2) /* status has changed */
#define TASK (1 << 3) /* interrupt task queued */
#define READ (1 << 4) /* read pending */
#define WRITE (1 << 5) /* write pending */
int ks_mode; /* K_XLATE, K_RAW, K_CODE */
int ks_polling; /* polling flag */
int ks_state; /* shift/lock key state */
int ks_accents; /* accent key index (> 0) */
u_int ks_composed_char; /* composed char code */
u_char ks_prefix; /* AT scan code prefix */
VKBD_LOCK_DECL;
};
typedef struct vkbd_state vkbd_state_t;
/*****************************************************************************
*****************************************************************************
** Character device
*****************************************************************************
*****************************************************************************/
static void vkbd_dev_clone(void *, struct ucred *, char *, int,
struct cdev **);
static d_open_t vkbd_dev_open;
static d_close_t vkbd_dev_close;
static d_read_t vkbd_dev_read;
static d_write_t vkbd_dev_write;
static d_ioctl_t vkbd_dev_ioctl;
static d_poll_t vkbd_dev_poll;
static void vkbd_dev_intr(void *, int);
static void vkbd_status_changed(vkbd_state_t *);
static int vkbd_data_ready(vkbd_state_t *);
static int vkbd_data_read(vkbd_state_t *, int);
static struct cdevsw vkbd_dev_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_PSEUDO | D_NEEDGIANT,
.d_open = vkbd_dev_open,
.d_close = vkbd_dev_close,
.d_read = vkbd_dev_read,
.d_write = vkbd_dev_write,
.d_ioctl = vkbd_dev_ioctl,
.d_poll = vkbd_dev_poll,
.d_name = DEVICE_NAME,
};
static struct clonedevs *vkbd_dev_clones = NULL;
/* Clone device */
static void
vkbd_dev_clone(void *arg, struct ucred *cred, char *name, int namelen,
struct cdev **dev)
{
int unit;
if (*dev != NULL)
return;
if (strcmp(name, DEVICE_NAME) == 0)
unit = -1;
else if (dev_stdclone(name, NULL, DEVICE_NAME, &unit) != 1)
return; /* don't recognize the name */
/* find any existing device, or allocate new unit number */
if (clone_create(&vkbd_dev_clones, &vkbd_dev_cdevsw, &unit, dev, 0)) {
*dev = make_dev(&vkbd_dev_cdevsw, unit2minor(unit),
UID_ROOT, GID_WHEEL, 0600, DEVICE_NAME "%d", unit);
if (*dev != NULL) {
dev_ref(*dev);
(*dev)->si_flags |= SI_CHEAPCLONE;
}
}
}
/* Open device */
static int
vkbd_dev_open(struct cdev *dev, int flag, int mode, struct thread *td)
{
int unit = dev2unit(dev), error;
keyboard_switch_t *sw = NULL;
keyboard_t *kbd = NULL;
vkbd_state_t *state = (vkbd_state_t *) dev->si_drv1;
/* XXX FIXME: dev->si_drv1 locking */
if (state == NULL) {
if ((sw = kbd_get_switch(KEYBOARD_NAME)) == NULL)
return (ENXIO);
if ((error = (*sw->probe)(unit, NULL, 0)) != 0 ||
(error = (*sw->init)(unit, &kbd, NULL, 0)) != 0)
return (error);
state = (vkbd_state_t *) kbd->kb_data;
if ((error = (*sw->enable)(kbd)) != 0) {
(*sw->term)(kbd);
return (error);
}
#ifdef KBD_INSTALL_CDEV
if ((error = kbd_attach(kbd)) != 0) {
(*sw->disable)(kbd);
(*sw->term)(kbd);
return (error);
}
#endif /* def KBD_INSTALL_CDEV */
dev->si_drv1 = kbd->kb_data;
}
VKBD_LOCK(state);
if (state->ks_flags & OPEN) {
VKBD_UNLOCK(state);
return (EBUSY);
}
state->ks_flags |= OPEN;
state->ks_dev = dev;
VKBD_UNLOCK(state);
return (0);
}
/* Close device */
static int
vkbd_dev_close(struct cdev *dev, int foo, int bar, struct thread *td)
{
keyboard_t *kbd = VKBD_KEYBOARD(dev);
vkbd_state_t *state = NULL;
if (kbd == NULL)
return (ENXIO);
if (kbd->kb_data == NULL || kbd->kb_data != dev->si_drv1)
panic("%s: kbd->kb_data != dev->si_drv1\n", __func__);
state = (vkbd_state_t *) kbd->kb_data;
VKBD_LOCK(state);
/* wait for interrupt task */
while (state->ks_flags & TASK)
VKBD_SLEEP(state, ks_task, "vkbdc", 0);
/* wakeup poll()ers */
selwakeuppri(&state->ks_rsel, PZERO + 1);
selwakeuppri(&state->ks_wsel, PZERO + 1);
state->ks_flags &= ~OPEN;
state->ks_dev = NULL;
state->ks_inq.head = state->ks_inq.tail = state->ks_inq.cc = 0;
VKBD_UNLOCK(state);
(*kbdsw[kbd->kb_index]->disable)(kbd);
#ifdef KBD_INSTALL_CDEV
kbd_detach(kbd);
#endif /* def KBD_INSTALL_CDEV */
(*kbdsw[kbd->kb_index]->term)(kbd);
/* XXX FIXME: dev->si_drv1 locking */
dev->si_drv1 = NULL;
return (0);
}
/* Read status */
static int
vkbd_dev_read(struct cdev *dev, struct uio *uio, int flag)
{
keyboard_t *kbd = VKBD_KEYBOARD(dev);
vkbd_state_t *state = NULL;
vkbd_status_t status;
int error;
if (kbd == NULL)
return (ENXIO);
if (uio->uio_resid != sizeof(status))
return (EINVAL);
if (kbd->kb_data == NULL || kbd->kb_data != dev->si_drv1)
panic("%s: kbd->kb_data != dev->si_drv1\n", __func__);
state = (vkbd_state_t *) kbd->kb_data;
VKBD_LOCK(state);
if (state->ks_flags & READ) {
VKBD_UNLOCK(state);
return (EALREADY);
}
state->ks_flags |= READ;
again:
if (state->ks_flags & STATUS) {
state->ks_flags &= ~STATUS;
status.mode = state->ks_mode;
status.leds = KBD_LED_VAL(kbd);
status.lock = state->ks_state & LOCK_MASK;
status.delay = kbd->kb_delay1;
status.rate = kbd->kb_delay2;
bzero(status.reserved, sizeof(status.reserved));
error = uiomove(&status, sizeof(status), uio);
} else {
if (flag & O_NONBLOCK) {
error = EWOULDBLOCK;
goto done;
}
error = VKBD_SLEEP(state, ks_flags, "vkbdr", 0);
if (error != 0)
goto done;
goto again;
}
done:
state->ks_flags &= ~READ;
VKBD_UNLOCK(state);
return (error);
}
/* Write scancodes */
static int
vkbd_dev_write(struct cdev *dev, struct uio *uio, int flag)
{
keyboard_t *kbd = VKBD_KEYBOARD(dev);
vkbd_state_t *state = NULL;
vkbd_queue_t *q = NULL;
int error, avail, bytes;
if (kbd == NULL)
return (ENXIO);
if (uio->uio_resid <= 0)
return (EINVAL);
if (kbd->kb_data == NULL || kbd->kb_data != dev->si_drv1)
panic("%s: kbd->kb_data != dev->si_drv1\n", __func__);
state = (vkbd_state_t *) kbd->kb_data;
VKBD_LOCK(state);
if (state->ks_flags & WRITE) {
VKBD_UNLOCK(state);
return (EALREADY);
}
state->ks_flags |= WRITE;
error = 0;
q = &state->ks_inq;
while (uio->uio_resid >= sizeof(q->q[0])) {
if (q->head == q->tail) {
if (q->cc == 0)
avail = sizeof(q->q)/sizeof(q->q[0]) - q->head;
else
avail = 0; /* queue must be full */
} else if (q->head < q->tail)
avail = sizeof(q->q)/sizeof(q->q[0]) - q->tail;
else
avail = q->head - q->tail;
if (avail == 0) {
if (flag & O_NONBLOCK) {
error = EWOULDBLOCK;
break;
}
error = VKBD_SLEEP(state, ks_inq, "vkbdw", 0);
if (error != 0)
break;
} else {
bytes = avail * sizeof(q->q[0]);
if (bytes > uio->uio_resid) {
avail = uio->uio_resid / sizeof(q->q[0]);
bytes = avail * sizeof(q->q[0]);
}
error = uiomove((void *) &q->q[q->tail], bytes, uio);
if (error != 0)
break;
q->cc += avail;
q->tail += avail;
if (q->tail == sizeof(q->q)/sizeof(q->q[0]))
q->tail = 0;
/* queue interrupt task if needed */
if (!(state->ks_flags & TASK) &&
taskqueue_enqueue(taskqueue_swi_giant, &state->ks_task) == 0)
state->ks_flags |= TASK;
}
}
state->ks_flags &= ~WRITE;
VKBD_UNLOCK(state);
return (error);
}
/* Process ioctl */
static int
vkbd_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
keyboard_t *kbd = VKBD_KEYBOARD(dev);
return ((kbd == NULL)? ENXIO :
(*kbdsw[kbd->kb_index]->ioctl)(kbd, cmd, data));
}
/* Poll device */
static int
vkbd_dev_poll(struct cdev *dev, int events, struct thread *td)
{
vkbd_state_t *state = (vkbd_state_t *) dev->si_drv1;
vkbd_queue_t *q = NULL;
int revents = 0;
if (state == NULL)
return (ENXIO);
VKBD_LOCK(state);
q = &state->ks_inq;
if (events & (POLLIN | POLLRDNORM)) {
if (state->ks_flags & STATUS)
revents |= events & (POLLIN | POLLRDNORM);
else
selrecord(td, &state->ks_rsel);
}
if (events & (POLLOUT | POLLWRNORM)) {
if (q->cc < sizeof(q->q)/sizeof(q->q[0]))
revents |= events & (POLLOUT | POLLWRNORM);
else
selrecord(td, &state->ks_wsel);
}
VKBD_UNLOCK(state);
return (revents);
}
/* Interrupt handler */
void
vkbd_dev_intr(void *xkbd, int pending)
{
keyboard_t *kbd = (keyboard_t *) xkbd;
vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data;
(*kbdsw[kbd->kb_index]->intr)(kbd, NULL);
VKBD_LOCK(state);
state->ks_flags &= ~TASK;
wakeup(&state->ks_task);
VKBD_UNLOCK(state);
}
/* Set status change flags */
static void
vkbd_status_changed(vkbd_state_t *state)
{
VKBD_LOCK_ASSERT(state, MA_OWNED);
if (!(state->ks_flags & STATUS)) {
state->ks_flags |= STATUS;
selwakeuppri(&state->ks_rsel, PZERO + 1);
wakeup(&state->ks_flags);
}
}
/* Check if we have data in the input queue */
static int
vkbd_data_ready(vkbd_state_t *state)
{
VKBD_LOCK_ASSERT(state, MA_OWNED);
return (state->ks_inq.cc > 0);
}
/* Read one code from the input queue */
static int
vkbd_data_read(vkbd_state_t *state, int wait)
{
vkbd_queue_t *q = &state->ks_inq;
int c;
VKBD_LOCK_ASSERT(state, MA_OWNED);
if (q->cc == 0)
return (-1);
/* get first code from the queue */
q->cc --;
c = q->q[q->head ++];
if (q->head == sizeof(q->q)/sizeof(q->q[0]))
q->head = 0;
/* wakeup ks_inq writers/poll()ers */
selwakeuppri(&state->ks_wsel, PZERO + 1);
wakeup(q);
return (c);
}
/****************************************************************************
****************************************************************************
** Keyboard driver
****************************************************************************
****************************************************************************/
static int vkbd_configure(int flags);
static kbd_probe_t vkbd_probe;
static kbd_init_t vkbd_init;
static kbd_term_t vkbd_term;
static kbd_intr_t vkbd_intr;
static kbd_test_if_t vkbd_test_if;
static kbd_enable_t vkbd_enable;
static kbd_disable_t vkbd_disable;
static kbd_read_t vkbd_read;
static kbd_check_t vkbd_check;
static kbd_read_char_t vkbd_read_char;
static kbd_check_char_t vkbd_check_char;
static kbd_ioctl_t vkbd_ioctl;
static kbd_lock_t vkbd_lock;
static void vkbd_clear_state_locked(vkbd_state_t *state);
static kbd_clear_state_t vkbd_clear_state;
static kbd_get_state_t vkbd_get_state;
static kbd_set_state_t vkbd_set_state;
static kbd_poll_mode_t vkbd_poll;
static keyboard_switch_t vkbdsw = {
.probe = vkbd_probe,
.init = vkbd_init,
.term = vkbd_term,
.intr = vkbd_intr,
.test_if = vkbd_test_if,
.enable = vkbd_enable,
.disable = vkbd_disable,
.read = vkbd_read,
.check = vkbd_check,
.read_char = vkbd_read_char,
.check_char = vkbd_check_char,
.ioctl = vkbd_ioctl,
.lock = vkbd_lock,
.clear_state = vkbd_clear_state,
.get_state = vkbd_get_state,
.set_state = vkbd_set_state,
.get_fkeystr = genkbd_get_fkeystr,
.poll = vkbd_poll,
.diag = genkbd_diag,
};
static int typematic(int delay, int rate);
static int typematic_delay(int delay);
static int typematic_rate(int rate);
/* Return the number of found keyboards */
static int
vkbd_configure(int flags)
{
return (1);
}
/* Detect a keyboard */
static int
vkbd_probe(int unit, void *arg, int flags)
{
return (0);
}
/* Reset and initialize the keyboard (stolen from atkbd.c) */
static int
vkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags)
{
keyboard_t *kbd = NULL;
vkbd_state_t *state = NULL;
keymap_t *keymap = NULL;
accentmap_t *accmap = NULL;
fkeytab_t *fkeymap = NULL;
int fkeymap_size, delay[2];
int error, needfree;
if (*kbdp == NULL) {
*kbdp = kbd = malloc(sizeof(*kbd), M_VKBD, M_NOWAIT | M_ZERO);
state = malloc(sizeof(*state), M_VKBD, M_NOWAIT | M_ZERO);
keymap = malloc(sizeof(key_map), M_VKBD, M_NOWAIT);
accmap = malloc(sizeof(accent_map), M_VKBD, M_NOWAIT);
fkeymap = malloc(sizeof(fkey_tab), M_VKBD, M_NOWAIT);
fkeymap_size = sizeof(fkey_tab)/sizeof(fkey_tab[0]);
needfree = 1;
if ((kbd == NULL) || (state == NULL) || (keymap == NULL) ||
(accmap == NULL) || (fkeymap == NULL)) {
error = ENOMEM;
goto bad;
}
VKBD_LOCK_INIT(state);
state->ks_inq.head = state->ks_inq.tail = state->ks_inq.cc = 0;
TASK_INIT(&state->ks_task, 0, vkbd_dev_intr, (void *) kbd);
} else if (KBD_IS_INITIALIZED(*kbdp) && KBD_IS_CONFIGURED(*kbdp)) {
return (0);
} else {
kbd = *kbdp;
state = (vkbd_state_t *) kbd->kb_data;
keymap = kbd->kb_keymap;
accmap = kbd->kb_accentmap;
fkeymap = kbd->kb_fkeytab;
fkeymap_size = kbd->kb_fkeytab_size;
needfree = 0;
}
if (!KBD_IS_PROBED(kbd)) {
kbd_init_struct(kbd, KEYBOARD_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;
KBD_FOUND_DEVICE(kbd);
KBD_PROBE_DONE(kbd);
VKBD_LOCK(state);
vkbd_clear_state_locked(state);
state->ks_mode = K_XLATE;
/* FIXME: set the initial value for lock keys in ks_state */
VKBD_UNLOCK(state);
}
if (!KBD_IS_INITIALIZED(kbd) && !(flags & KB_CONF_PROBE_ONLY)) {
kbd->kb_config = flags & ~KB_CONF_PROBE_ONLY;
vkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state);
delay[0] = kbd->kb_delay1;
delay[1] = kbd->kb_delay2;
vkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay);
KBD_INIT_DONE(kbd);
}
if (!KBD_IS_CONFIGURED(kbd)) {
if (kbd_register(kbd) < 0) {
error = ENXIO;
goto bad;
}
KBD_CONFIG_DONE(kbd);
}
return (0);
bad:
if (needfree) {
if (state != NULL)
free(state, M_VKBD);
if (keymap != NULL)
free(keymap, M_VKBD);
if (accmap != NULL)
free(accmap, M_VKBD);
if (fkeymap != NULL)
free(fkeymap, M_VKBD);
if (kbd != NULL) {
free(kbd, M_VKBD);
*kbdp = NULL; /* insure ref doesn't leak to caller */
}
}
return (error);
}
/* Finish using this keyboard */
static int
vkbd_term(keyboard_t *kbd)
{
vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data;
kbd_unregister(kbd);
VKBD_LOCK_DESTROY(state);
bzero(state, sizeof(*state));
free(state, M_VKBD);
free(kbd->kb_keymap, M_VKBD);
free(kbd->kb_accentmap, M_VKBD);
free(kbd->kb_fkeytab, M_VKBD);
free(kbd, M_VKBD);
return (0);
}
/* Keyboard interrupt routine */
static int
vkbd_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 = vkbd_read_char(kbd, FALSE);
} while (c != NOKEY);
}
return (0);
}
/* Test the interface to the device */
static int
vkbd_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
vkbd_enable(keyboard_t *kbd)
{
KBD_ACTIVATE(kbd);
return (0);
}
/* Disallow the access to the device */
static int
vkbd_disable(keyboard_t *kbd)
{
KBD_DEACTIVATE(kbd);
return (0);
}
/* Read one byte from the keyboard if it's allowed */
static int
vkbd_read(keyboard_t *kbd, int wait)
{
vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data;
int c;
VKBD_LOCK(state);
c = vkbd_data_read(state, wait);
VKBD_UNLOCK(state);
if (c != -1)
kbd->kb_count ++;
return (KBD_IS_ACTIVE(kbd)? c : -1);
}
/* Check if data is waiting */
static int
vkbd_check(keyboard_t *kbd)
{
vkbd_state_t *state = NULL;
int ready;
if (!KBD_IS_ACTIVE(kbd))
return (FALSE);
state = (vkbd_state_t *) kbd->kb_data;
VKBD_LOCK(state);
ready = vkbd_data_ready(state);
VKBD_UNLOCK(state);
return (ready);
}
/* Read char from the keyboard (stolen from atkbd.c) */
static u_int
vkbd_read_char(keyboard_t *kbd, int wait)
{
vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data;
u_int action;
int scancode, keycode;
VKBD_LOCK(state);
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) {
VKBD_UNLOCK(state);
return (ERRKEY);
}
VKBD_UNLOCK(state);
return (action);
}
/* see if there is something in the keyboard port */
scancode = vkbd_data_read(state, wait);
if (scancode == -1) {
VKBD_UNLOCK(state);
return (NOKEY);
}
/* XXX FIXME: check for -1 if wait == 1! */
kbd->kb_count ++;
/* return the byte as is for the K_RAW mode */
if (state->ks_mode == K_RAW) {
VKBD_UNLOCK(state);
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) {
VKBD_UNLOCK(state);
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) {
VKBD_UNLOCK(state);
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) {
VKBD_UNLOCK(state);
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) {
VKBD_UNLOCK(state);
return (ERRKEY);
}
goto next_code;
case 0x52: /* keypad 0 */
state->ks_composed_char *= 10;
if (state->ks_composed_char > UCHAR_MAX) {
VKBD_UNLOCK(state);
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;
VKBD_UNLOCK(state);
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;
VKBD_UNLOCK(state);
return (action);
}
/* Check if char is waiting */
static int
vkbd_check_char(keyboard_t *kbd)
{
vkbd_state_t *state = NULL;
int ready;
if (!KBD_IS_ACTIVE(kbd))
return (FALSE);
state = (vkbd_state_t *) kbd->kb_data;
VKBD_LOCK(state);
if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0))
ready = TRUE;
else
ready = vkbd_data_ready(state);
VKBD_UNLOCK(state);
return (ready);
}
/* Some useful control functions (stolen from atkbd.c) */
static int
vkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
{
vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data;
int i;
VKBD_LOCK(state);
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);
vkbd_status_changed(state);
}
/* FALLTHROUGH */
case K_RAW:
case K_CODE:
if (state->ks_mode != *(int *)arg) {
vkbd_clear_state_locked(state);
state->ks_mode = *(int *)arg;
vkbd_status_changed(state);
}
break;
default:
VKBD_UNLOCK(state);
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) {
VKBD_UNLOCK(state);
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;
}
KBD_LED_VAL(kbd) = *(int *)arg;
vkbd_status_changed(state);
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) {
VKBD_UNLOCK(state);
return (EINVAL);
}
state->ks_state &= ~LOCK_MASK;
state->ks_state |= *(int *)arg;
vkbd_status_changed(state);
VKBD_UNLOCK(state);
/* set LEDs and quit */
return (vkbd_ioctl(kbd, KDSETLED, arg));
case KDSETREPEAT: /* set keyboard repeat rate (new interface) */
i = typematic(((int *)arg)[0], ((int *)arg)[1]);
kbd->kb_delay1 = typematic_delay(i);
kbd->kb_delay2 = typematic_rate(i);
vkbd_status_changed(state);
break;
case KDSETRAD: /* set keyboard repeat rate (old interface) */
kbd->kb_delay1 = typematic_delay(*(int *)arg);
kbd->kb_delay2 = typematic_rate(*(int *)arg);
vkbd_status_changed(state);
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:
VKBD_UNLOCK(state);
return (genkbd_commonioctl(kbd, cmd, arg));
}
VKBD_UNLOCK(state);
return (0);
}
/* Lock the access to the keyboard */
static int
vkbd_lock(keyboard_t *kbd, int lock)
{
return (1); /* XXX */
}
/* Clear the internal state of the keyboard */
static void
vkbd_clear_state_locked(vkbd_state_t *state)
{
VKBD_LOCK_ASSERT(state, MA_OWNED);
state->ks_flags &= ~COMPOSE;
state->ks_polling = 0;
state->ks_state &= LOCK_MASK; /* preserve locking key state */
state->ks_accents = 0;
state->ks_composed_char = 0;
/* state->ks_prefix = 0; XXX */
/* flush ks_inq and wakeup writers/poll()ers */
state->ks_inq.head = state->ks_inq.tail = state->ks_inq.cc = 0;
selwakeuppri(&state->ks_wsel, PZERO + 1);
wakeup(&state->ks_inq);
}
static void
vkbd_clear_state(keyboard_t *kbd)
{
vkbd_state_t *state = (vkbd_state_t *) kbd->kb_data;
VKBD_LOCK(state);
vkbd_clear_state_locked(state);
VKBD_UNLOCK(state);
}
/* Save the internal state */
static int
vkbd_get_state(keyboard_t *kbd, void *buf, size_t len)
{
if (len == 0)
return (sizeof(vkbd_state_t));
if (len < sizeof(vkbd_state_t))
return (-1);
bcopy(kbd->kb_data, buf, sizeof(vkbd_state_t)); /* XXX locking? */
return (0);
}
/* Set the internal state */
static int
vkbd_set_state(keyboard_t *kbd, void *buf, size_t len)
{
if (len < sizeof(vkbd_state_t))
return (ENOMEM);
bcopy(buf, kbd->kb_data, sizeof(vkbd_state_t)); /* XXX locking? */
return (0);
}
/* Set polling */
static int
vkbd_poll(keyboard_t *kbd, int on)
{
vkbd_state_t *state = NULL;
state = (vkbd_state_t *) kbd->kb_data;
VKBD_LOCK(state);
if (on)
state->ks_polling ++;
else
state->ks_polling --;
VKBD_UNLOCK(state);
return (0);
}
/*
* Local functions
*/
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);
}
/*****************************************************************************
*****************************************************************************
** Module
*****************************************************************************
*****************************************************************************/
KEYBOARD_DRIVER(vkbd, vkbdsw, vkbd_configure);
static int
vkbd_modevent(module_t mod, int type, void *data)
{
static eventhandler_tag tag;
switch (type) {
case MOD_LOAD:
clone_setup(&vkbd_dev_clones);
tag = EVENTHANDLER_REGISTER(dev_clone, vkbd_dev_clone, 0, 1000);
if (tag == NULL) {
clone_cleanup(&vkbd_dev_clones);
return (ENOMEM);
}
kbd_add_driver(&vkbd_kbd_driver);
break;
case MOD_UNLOAD:
kbd_delete_driver(&vkbd_kbd_driver);
EVENTHANDLER_DEREGISTER(dev_clone, tag);
clone_cleanup(&vkbd_dev_clones);
break;
default:
return (EOPNOTSUPP);
}
return (0);
}
DEV_MODULE(vkbd, vkbd_modevent, NULL);
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