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freebsd-dev/sys/dev/kbd/kbdreg.h
Kyle Evans 3ed7166aca kbd: merge linker set drivers into standard kbd driver list 
This leads to the revert of r355806; this reduces duplication in keyboard
registration and driver switch lookup and leaves us with one authoritative
source for currently registered drivers. The reduced duplication later is
nice as we have more procedure involved in keyboard setup.

keyboard_driver->flags is used to more quickly detect bogus adds/removes.
From KPI consumers' perspective, nothing changes- kbd_add_driver of an
already-registered driver will succeed, and a single kbd_delete_driver will
later remove it as expected. In contrast to historical behavior,
kbd_delete_driver on a driver registered via linker set will now actually
de-register the driver so that it may not be used -- e.g. if kbdmux's
MOD_LOAD handler fails somewhere.

Detection for already-registered drivers in kbd_add_driver has improved, as
the previous SLIST_NEXT(driver) != NULL check would not have caught a driver
that's at the tail end.

kbdinit is now called from cninit() rather than via SYSINIT so that keyboard
drivers are available as early as console drivers. This is particularly
important as cnprobe will, in both syscons and vt, attempt to do any early
configuration of keyboard drivers built-in (see: kbd_configure).

Reviewed by:	imp (earlier version, pre-cninit change)
Differential Revision:	https://reviews.freebsd.org/D22835
2019-12-26 15:21:34 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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.
*
* $FreeBSD$
*/
#ifndef _DEV_KBD_KBDREG_H_
#define _DEV_KBD_KBDREG_H_
/* forward declarations */
typedef struct keyboard keyboard_t;
struct keymap;
struct accentmap;
struct fkeytab;
struct cdevsw;
/* call back funcion */
typedef int kbd_callback_func_t(keyboard_t *kbd, int event,
void *arg);
/* keyboard function table */
typedef int kbd_probe_t(int unit, void *arg, int flags);
typedef int kbd_init_t(int unit, keyboard_t **kbdp, void *arg,
int flags);
typedef int kbd_term_t(keyboard_t *kbd);
typedef int kbd_intr_t(keyboard_t *kbd, void *arg);
typedef int kbd_test_if_t(keyboard_t *kbd);
typedef int kbd_enable_t(keyboard_t *kbd);
typedef int kbd_disable_t(keyboard_t *kbd);
typedef int kbd_read_t(keyboard_t *kbd, int wait);
typedef int kbd_check_t(keyboard_t *kbd);
typedef u_int kbd_read_char_t(keyboard_t *kbd, int wait);
typedef int kbd_check_char_t(keyboard_t *kbd);
typedef int kbd_ioctl_t(keyboard_t *kbd, u_long cmd, caddr_t data);
typedef int kbd_lock_t(keyboard_t *kbd, int lock);
typedef void kbd_clear_state_t(keyboard_t *kbd);
typedef int kbd_get_state_t(keyboard_t *kbd, void *buf, size_t len);
typedef int kbd_set_state_t(keyboard_t *kbd, void *buf, size_t len);
typedef u_char *kbd_get_fkeystr_t(keyboard_t *kbd, int fkey,
size_t *len);
typedef int kbd_poll_mode_t(keyboard_t *kbd, int on);
typedef void kbd_diag_t(keyboard_t *kbd, int level);
/* event types */
#define KBDIO_KEYINPUT 0
#define KBDIO_UNLOADING 1
typedef struct keyboard_callback {
kbd_callback_func_t *kc_func;
void *kc_arg;
} keyboard_callback_t;
typedef struct keyboard_switch {
kbd_probe_t *probe;
kbd_init_t *init;
kbd_term_t *term;
kbd_intr_t *intr;
kbd_test_if_t *test_if;
kbd_enable_t *enable;
kbd_disable_t *disable;
kbd_read_t *read;
kbd_check_t *check;
kbd_read_char_t *read_char;
kbd_check_char_t *check_char;
kbd_ioctl_t *ioctl;
kbd_lock_t *lock;
kbd_clear_state_t *clear_state;
kbd_get_state_t *get_state;
kbd_set_state_t *set_state;
kbd_get_fkeystr_t *get_fkeystr;
kbd_poll_mode_t *poll;
kbd_diag_t *diag;
} keyboard_switch_t;
/*
* Keyboard driver definition. Some of these be immutable after definition
* time, e.g. one shouldn't be able to rename a driver or use a different kbdsw
* entirely, but patching individual methods is acceptable.
*/
typedef struct keyboard_driver {
SLIST_ENTRY(keyboard_driver) link;
const char * const name;
keyboard_switch_t * const kbdsw;
/* backdoor for the console driver */
int (* const configure)(int);
int flags;
} keyboard_driver_t;
#define KBDF_REGISTERED 0x0001
/* keyboard */
struct keyboard {
/* the following fields are managed by kbdio */
int kb_index; /* kbdio index# */
int kb_minor; /* minor number of the sub-device */
int kb_flags; /* internal flags */
#define KB_VALID (1 << 16) /* this entry is valid */
#define KB_NO_DEVICE (1 << 17) /* device not present */
#define KB_PROBED (1 << 18) /* device probed */
#define KB_INITIALIZED (1 << 19) /* device initialized */
#define KB_REGISTERED (1 << 20) /* device registered to kbdio */
#define KB_BUSY (1 << 21) /* device used by a client */
#define KB_POLLED (1 << 22) /* device is polled */
int kb_active; /* 0: inactive */
void *kb_token; /* id of the current client */
keyboard_callback_t kb_callback;/* callback function */
/*
* Device configuration flags:
* The upper 16 bits are common between various keyboard devices.
* The lower 16 bits are device-specific.
*/
int kb_config;
#define KB_CONF_PROBE_ONLY (1 << 16) /* probe only, don't initialize */
/* the following fields are set up by the driver */
char *kb_name; /* driver name */
int kb_unit; /* unit # */
int kb_type; /* KB_84, KB_101, KB_OTHER,... */
int kb_io_base; /* port# if any */
int kb_io_size; /* # of occupied port */
int kb_led; /* LED status */
struct keymap *kb_keymap; /* key map */
struct accentmap *kb_accentmap; /* accent map */
struct fkeytab *kb_fkeytab; /* function key strings */
int kb_fkeytab_size;/* # of function key strings */
void *kb_data; /* the driver's private data */
int kb_delay1;
int kb_delay2;
#define KB_DELAY1 500
#define KB_DELAY2 100
unsigned long kb_count; /* # of processed key strokes */
u_char kb_lastact[NUM_KEYS/2];
struct cdev *kb_dev;
const keyboard_driver_t *kb_drv;
};
#define KBD_IS_VALID(k) ((k)->kb_flags & KB_VALID)
#define KBD_VALID(k) ((k)->kb_flags |= KB_VALID)
#define KBD_INVALID(k) ((k)->kb_flags &= ~KB_VALID)
#define KBD_HAS_DEVICE(k) (!((k)->kb_flags & KB_NO_DEVICE))
#define KBD_FOUND_DEVICE(k) ((k)->kb_flags &= ~KB_NO_DEVICE)
#define KBD_IS_PROBED(k) ((k)->kb_flags & KB_PROBED)
#define KBD_PROBE_DONE(k) ((k)->kb_flags |= KB_PROBED)
#define KBD_IS_INITIALIZED(k) ((k)->kb_flags & KB_INITIALIZED)
#define KBD_INIT_DONE(k) ((k)->kb_flags |= KB_INITIALIZED)
#define KBD_IS_CONFIGURED(k) ((k)->kb_flags & KB_REGISTERED)
#define KBD_CONFIG_DONE(k) ((k)->kb_flags |= KB_REGISTERED)
#define KBD_IS_BUSY(k) ((k)->kb_flags & KB_BUSY)
#define KBD_BUSY(k) ((k)->kb_flags |= KB_BUSY)
#define KBD_UNBUSY(k) ((k)->kb_flags &= ~KB_BUSY)
#define KBD_IS_POLLED(k) ((k)->kb_flags & KB_POLLED)
#define KBD_POLL(k) ((k)->kb_flags |= KB_POLLED)
#define KBD_UNPOLL(k) ((k)->kb_flags &= ~KB_POLLED)
#define KBD_IS_ACTIVE(k) ((k)->kb_active)
#define KBD_ACTIVATE(k) (++(k)->kb_active)
#define KBD_DEACTIVATE(k) (--(k)->kb_active)
#define KBD_LED_VAL(k) ((k)->kb_led)
/*
* Keyboard disciplines: call actual handlers via kbdsw[].
*/
static __inline int
kbdd_probe(keyboard_t *kbd, int unit, void *arg, int flags)
{
return ((*kbd->kb_drv->kbdsw->probe)(unit, arg, flags));
}
static __inline int
kbdd_init(keyboard_t *kbd, int unit, keyboard_t **kbdpp, void *arg, int flags)
{
return ((*kbd->kb_drv->kbdsw->init)(unit, kbdpp, arg, flags));
}
static __inline int
kbdd_term(keyboard_t *kbd)
{
return ((*kbd->kb_drv->kbdsw->term)(kbd));
}
static __inline int
kbdd_intr(keyboard_t *kbd, void *arg)
{
return ((*kbd->kb_drv->kbdsw->intr)(kbd, arg));
}
static __inline int
kbdd_test_if(keyboard_t *kbd)
{
return ((*kbd->kb_drv->kbdsw->test_if)(kbd));
}
static __inline int
kbdd_enable(keyboard_t *kbd)
{
return ((*kbd->kb_drv->kbdsw->enable)(kbd));
}
static __inline int
kbdd_disable(keyboard_t *kbd)
{
return ((*kbd->kb_drv->kbdsw->disable)(kbd));
}
static __inline int
kbdd_read(keyboard_t *kbd, int wait)
{
return ((*kbd->kb_drv->kbdsw->read)(kbd, wait));
}
static __inline int
kbdd_check(keyboard_t *kbd)
{
return ((*kbd->kb_drv->kbdsw->check)(kbd));
}
static __inline u_int
kbdd_read_char(keyboard_t *kbd, int wait)
{
return ((*kbd->kb_drv->kbdsw->read_char)(kbd, wait));
}
static __inline int
kbdd_check_char(keyboard_t *kbd)
{
return ((*kbd->kb_drv->kbdsw->check_char)(kbd));
}
static __inline int
kbdd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t data)
{
if (kbd == NULL)
return (ENODEV);
return ((*kbd->kb_drv->kbdsw->ioctl)(kbd, cmd, data));
}
static __inline int
kbdd_lock(keyboard_t *kbd, int lock)
{
return ((*kbd->kb_drv->kbdsw->lock)(kbd, lock));
}
static __inline void
kbdd_clear_state(keyboard_t *kbd)
{
(*kbd->kb_drv->kbdsw->clear_state)(kbd);
}
static __inline int
kbdd_get_state(keyboard_t *kbd, void *buf, int len)
{
return ((*kbd->kb_drv->kbdsw->get_state)(kbd, buf, len));
}
static __inline int
kbdd_set_state(keyboard_t *kbd, void *buf, int len)
{
return ((*kbd->kb_drv->kbdsw->set_state)(kbd, buf, len));
}
static __inline u_char *
kbdd_get_fkeystr(keyboard_t *kbd, int fkey, size_t *len)
{
return ((*kbd->kb_drv->kbdsw->get_fkeystr)(kbd, fkey, len));
}
static __inline int
kbdd_poll(keyboard_t *kbd, int on)
{
return ((*kbd->kb_drv->kbdsw->poll)(kbd, on));
}
static __inline void
kbdd_diag(keyboard_t *kbd, int level)
{
(*kbd->kb_drv->kbdsw->diag)(kbd, level);
}
#define KEYBOARD_DRIVER(name, sw, config) \
static struct keyboard_driver name##_kbd_driver = { \
{ NULL }, #name, &sw, config \
}; \
DATA_SET(kbddriver_set, name##_kbd_driver);
/* functions for the keyboard driver */
int kbd_add_driver(keyboard_driver_t *driver);
int kbd_delete_driver(keyboard_driver_t *driver);
int kbd_register(keyboard_t *kbd);
int kbd_unregister(keyboard_t *kbd);
keyboard_switch_t *kbd_get_switch(char *driver);
void kbd_init_struct(keyboard_t *kbd, char *name, int type,
int unit, int config, int port,
int port_size);
void kbd_set_maps(keyboard_t *kbd, struct keymap *keymap,
struct accentmap *accmap,
struct fkeytab *fkeymap, int fkeymap_size);
/* functions for the keyboard client */
int kbd_allocate(char *driver, int unit, void *id,
kbd_callback_func_t *func, void *arg);
int kbd_release(keyboard_t *kbd, void *id);
int kbd_change_callback(keyboard_t *kbd, void *id,
kbd_callback_func_t *func, void *arg);
int kbd_find_keyboard(char *driver, int unit);
int kbd_find_keyboard2(char *driver, int unit, int index);
keyboard_t *kbd_get_keyboard(int index);
/* a back door for the console driver to tickle the keyboard driver XXX */
int kbd_configure(int flags);
/* see `kb_config' above for flag bit definitions */
/* evdev2kbd mappings */
void kbd_ev_event(keyboard_t *kbd, uint16_t type,
uint16_t code, int32_t value);
#ifdef KBD_INSTALL_CDEV
/* virtual keyboard cdev driver functions */
int kbd_attach(keyboard_t *kbd);
int kbd_detach(keyboard_t *kbd);
#endif /* KBD_INSTALL_CDEV */
/* generic low-level keyboard functions */
/* shift key state */
#define SHIFTS1 (1 << 16)
#define SHIFTS2 (1 << 17)
#define SHIFTS (SHIFTS1 | SHIFTS2)
#define CTLS1 (1 << 18)
#define CTLS2 (1 << 19)
#define CTLS (CTLS1 | CTLS2)
#define ALTS1 (1 << 20)
#define ALTS2 (1 << 21)
#define ALTS (ALTS1 | ALTS2)
#define AGRS1 (1 << 22)
#define AGRS2 (1 << 23)
#define AGRS (AGRS1 | AGRS2)
#define METAS1 (1 << 24)
#define METAS2 (1 << 25)
#define METAS (METAS1 | METAS2)
#define NLKDOWN (1 << 26)
#define SLKDOWN (1 << 27)
#define CLKDOWN (1 << 28)
#define ALKDOWN (1 << 29)
#define SHIFTAON (1 << 30)
/* lock key state (defined in sys/kbio.h) */
/*
#define CLKED LED_CAP
#define NLKED LED_NUM
#define SLKED LED_SCR
#define ALKED (1 << 3)
#define LOCK_MASK (CLKED | NLKED | SLKED | ALKED)
#define LED_CAP (1 << 0)
#define LED_NUM (1 << 1)
#define LED_SCR (1 << 2)
#define LED_MASK (LED_CAP | LED_NUM | LED_SCR)
*/
/* Initialization for the kbd layer, performed by cninit. */
void kbdinit(void);
int genkbd_commonioctl(keyboard_t *kbd, u_long cmd, caddr_t arg);
int genkbd_keyaction(keyboard_t *kbd, int keycode, int up,
int *shiftstate, int *accents);
#endif /* !_DEV_KBD_KBDREG_H_ */
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