freebsd-dev/sys/dev/gpio/gpiokeys.c
Oleksandr Tymoshenko 217d17bcd3 Clean up OF_getprop_alloc API
OF_getprop_alloc takes element size argument and returns number of
elements in the property. There are valid use cases for such behavior
but mostly API consumers pass 1 as element size to get string
properties. What API users would expect from OF_getprop_alloc is to be
a combination of malloc + OF_getprop with the same semantic of return
value. This patch modifies API signature to match these expectations.

For the valid use cases with element size != 1 and to reduce
modification scope new OF_getprop_alloc_multi function has been
introduced that behaves the same way OF_getprop_alloc behaved prior to
this patch.

Reviewed by:	ian, manu
Differential Revision:	https://reviews.freebsd.org/D14850
2018-04-08 22:59:34 +00:00

1018 lines
23 KiB
C

/*-
* Copyright (c) 2015-2016 Oleksandr Tymoshenko <gonzo@freebsd.org>
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include "opt_kbd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/gpio.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/kdb.h>
#include <sys/ioccom.h>
#include <sys/filio.h>
#include <sys/tty.h>
#include <sys/kbio.h>
#include <dev/kbd/kbdreg.h>
#include <dev/kbd/kbdtables.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/gpio/gpiobusvar.h>
#include <dev/gpio/gpiokeys.h>
#define KBD_DRIVER_NAME "gpiokeys"
#define GPIOKEYS_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define GPIOKEYS_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define GPIOKEYS_LOCK_INIT(_sc) \
mtx_init(&_sc->sc_mtx, device_get_nameunit((_sc)->sc_dev), \
"gpiokeys", MTX_DEF)
#define GPIOKEYS_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx);
#define GPIOKEYS_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
#define GPIOKEY_LOCK(_key) mtx_lock(&(_key)->mtx)
#define GPIOKEY_UNLOCK(_key) mtx_unlock(&(_key)->mtx)
#define GPIOKEY_LOCK_INIT(_key) \
mtx_init(&(_key)->mtx, "gpiokey", "gpiokey", MTX_DEF)
#define GPIOKEY_LOCK_DESTROY(_key) mtx_destroy(&(_key)->mtx);
#define KEY_PRESS 0
#define KEY_RELEASE 0x80
#define SCAN_PRESS 0
#define SCAN_RELEASE 0x80
#define SCAN_CHAR(c) ((c) & 0x7f)
#define GPIOKEYS_GLOBAL_NMOD 8 /* units */
#define GPIOKEYS_GLOBAL_NKEYCODE 6 /* units */
#define GPIOKEYS_GLOBAL_IN_BUF_SIZE (2*(GPIOKEYS_GLOBAL_NMOD + (2*GPIOKEYS_GLOBAL_NKEYCODE))) /* bytes */
#define GPIOKEYS_GLOBAL_IN_BUF_FULL (GPIOKEYS_GLOBAL_IN_BUF_SIZE / 2) /* bytes */
#define GPIOKEYS_GLOBAL_NFKEY (sizeof(fkey_tab)/sizeof(fkey_tab[0])) /* units */
#define GPIOKEYS_GLOBAL_BUFFER_SIZE 64 /* bytes */
#define AUTOREPEAT_DELAY 250
#define AUTOREPEAT_REPEAT 34
struct gpiokeys_softc;
struct gpiokey
{
struct gpiokeys_softc *parent_sc;
gpio_pin_t pin;
int irq_rid;
struct resource *irq_res;
void *intr_hl;
struct mtx mtx;
uint32_t keycode;
int autorepeat;
struct callout debounce_callout;
struct callout repeat_callout;
int repeat_delay;
int repeat;
int debounce_interval;
};
struct gpiokeys_softc
{
device_t sc_dev;
struct mtx sc_mtx;
struct gpiokey *sc_keys;
int sc_total_keys;
keyboard_t sc_kbd;
keymap_t sc_keymap;
accentmap_t sc_accmap;
fkeytab_t sc_fkeymap[GPIOKEYS_GLOBAL_NFKEY];
uint32_t sc_input[GPIOKEYS_GLOBAL_IN_BUF_SIZE]; /* input buffer */
uint32_t sc_time_ms;
#define GPIOKEYS_GLOBAL_FLAG_POLLING 0x00000002
uint32_t sc_flags; /* flags */
int sc_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */
int sc_state; /* shift/lock key state */
int sc_accents; /* accent key index (> 0) */
int sc_kbd_size;
uint16_t sc_inputs;
uint16_t sc_inputhead;
uint16_t sc_inputtail;
uint8_t sc_kbd_id;
};
/* gpio-keys device */
static int gpiokeys_probe(device_t);
static int gpiokeys_attach(device_t);
static int gpiokeys_detach(device_t);
/* kbd methods prototypes */
static int gpiokeys_set_typematic(keyboard_t *, int);
static uint32_t gpiokeys_read_char(keyboard_t *, int);
static void gpiokeys_clear_state(keyboard_t *);
static int gpiokeys_ioctl(keyboard_t *, u_long, caddr_t);
static int gpiokeys_enable(keyboard_t *);
static int gpiokeys_disable(keyboard_t *);
static void gpiokeys_event_keyinput(struct gpiokeys_softc *);
static void
gpiokeys_put_key(struct gpiokeys_softc *sc, uint32_t key)
{
GPIOKEYS_ASSERT_LOCKED(sc);
if (sc->sc_inputs < GPIOKEYS_GLOBAL_IN_BUF_SIZE) {
sc->sc_input[sc->sc_inputtail] = key;
++(sc->sc_inputs);
++(sc->sc_inputtail);
if (sc->sc_inputtail >= GPIOKEYS_GLOBAL_IN_BUF_SIZE) {
sc->sc_inputtail = 0;
}
} else {
device_printf(sc->sc_dev, "input buffer is full\n");
}
}
static void
gpiokeys_key_event(struct gpiokeys_softc *sc, uint16_t keycode, int pressed)
{
uint32_t key;
key = keycode & SCAN_KEYCODE_MASK;
if (!pressed)
key |= KEY_RELEASE;
GPIOKEYS_LOCK(sc);
if (keycode & SCAN_PREFIX_E0)
gpiokeys_put_key(sc, 0xe0);
else if (keycode & SCAN_PREFIX_E1)
gpiokeys_put_key(sc, 0xe1);
gpiokeys_put_key(sc, key);
GPIOKEYS_UNLOCK(sc);
gpiokeys_event_keyinput(sc);
}
static void
gpiokey_autorepeat(void *arg)
{
struct gpiokey *key;
key = arg;
if (key->keycode == GPIOKEY_NONE)
return;
gpiokeys_key_event(key->parent_sc, key->keycode, 1);
callout_reset(&key->repeat_callout, key->repeat,
gpiokey_autorepeat, key);
}
static void
gpiokey_debounced_intr(void *arg)
{
struct gpiokey *key;
bool active;
key = arg;
if (key->keycode == GPIOKEY_NONE)
return;
gpio_pin_is_active(key->pin, &active);
if (active) {
gpiokeys_key_event(key->parent_sc, key->keycode, 1);
if (key->autorepeat) {
callout_reset(&key->repeat_callout, key->repeat_delay,
gpiokey_autorepeat, key);
}
}
else {
if (key->autorepeat &&
callout_pending(&key->repeat_callout))
callout_stop(&key->repeat_callout);
gpiokeys_key_event(key->parent_sc, key->keycode, 0);
}
}
static void
gpiokey_intr(void *arg)
{
struct gpiokey *key;
int debounce_ticks;
key = arg;
GPIOKEY_LOCK(key);
debounce_ticks = (hz * key->debounce_interval) / 1000;
if (debounce_ticks == 0)
debounce_ticks = 1;
if (!callout_pending(&key->debounce_callout))
callout_reset(&key->debounce_callout, debounce_ticks,
gpiokey_debounced_intr, key);
GPIOKEY_UNLOCK(key);
}
static void
gpiokeys_attach_key(struct gpiokeys_softc *sc, phandle_t node,
struct gpiokey *key)
{
pcell_t prop;
char *name;
uint32_t code;
int err;
const char *key_name;
GPIOKEY_LOCK_INIT(key);
key->parent_sc = sc;
callout_init_mtx(&key->debounce_callout, &key->mtx, 0);
callout_init_mtx(&key->repeat_callout, &key->mtx, 0);
name = NULL;
if (OF_getprop_alloc(node, "label", (void **)&name) == -1)
OF_getprop_alloc(node, "name", (void **)&name);
if (name != NULL)
key_name = name;
else
key_name = "unknown";
key->autorepeat = OF_hasprop(node, "autorepeat");
key->repeat_delay = (hz * AUTOREPEAT_DELAY) / 1000;
if (key->repeat_delay == 0)
key->repeat_delay = 1;
key->repeat = (hz * AUTOREPEAT_REPEAT) / 1000;
if (key->repeat == 0)
key->repeat = 1;
if ((OF_getprop(node, "debounce-interval", &prop, sizeof(prop))) > 0)
key->debounce_interval = fdt32_to_cpu(prop);
else
key->debounce_interval = 5;
if ((OF_getprop(node, "freebsd,code", &prop, sizeof(prop))) > 0)
key->keycode = fdt32_to_cpu(prop);
else if ((OF_getprop(node, "linux,code", &prop, sizeof(prop))) > 0) {
code = fdt32_to_cpu(prop);
key->keycode = gpiokey_map_linux_code(code);
if (key->keycode == GPIOKEY_NONE)
device_printf(sc->sc_dev, "<%s> failed to map linux,code value 0x%x\n",
key_name, code);
}
else
device_printf(sc->sc_dev, "<%s> no linux,code or freebsd,code property\n",
key_name);
err = gpio_pin_get_by_ofw_idx(sc->sc_dev, node, 0, &key->pin);
if (err) {
device_printf(sc->sc_dev, "<%s> failed to map pin\n", key_name);
if (name)
OF_prop_free(name);
return;
}
key->irq_res = gpio_alloc_intr_resource(sc->sc_dev, &key->irq_rid,
RF_ACTIVE, key->pin, GPIO_INTR_EDGE_BOTH);
if (!key->irq_res) {
device_printf(sc->sc_dev, "<%s> cannot allocate interrupt\n", key_name);
gpio_pin_release(key->pin);
key->pin = NULL;
if (name)
OF_prop_free(name);
return;
}
if (bus_setup_intr(sc->sc_dev, key->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
NULL, gpiokey_intr, key,
&key->intr_hl) != 0) {
device_printf(sc->sc_dev, "<%s> unable to setup the irq handler\n", key_name);
bus_release_resource(sc->sc_dev, SYS_RES_IRQ, key->irq_rid,
key->irq_res);
gpio_pin_release(key->pin);
key->pin = NULL;
key->irq_res = NULL;
if (name)
OF_prop_free(name);
return;
}
if (bootverbose)
device_printf(sc->sc_dev, "<%s> code=%08x, autorepeat=%d, "\
"repeat=%d, repeat_delay=%d\n", key_name, key->keycode,
key->autorepeat, key->repeat, key->repeat_delay);
if (name)
OF_prop_free(name);
}
static void
gpiokeys_detach_key(struct gpiokeys_softc *sc, struct gpiokey *key)
{
GPIOKEY_LOCK(key);
if (key->intr_hl)
bus_teardown_intr(sc->sc_dev, key->irq_res, key->intr_hl);
if (key->irq_res)
bus_release_resource(sc->sc_dev, SYS_RES_IRQ,
key->irq_rid, key->irq_res);
if (callout_pending(&key->repeat_callout))
callout_drain(&key->repeat_callout);
if (callout_pending(&key->debounce_callout))
callout_drain(&key->debounce_callout);
if (key->pin)
gpio_pin_release(key->pin);
GPIOKEY_UNLOCK(key);
GPIOKEY_LOCK_DESTROY(key);
}
static int
gpiokeys_probe(device_t dev)
{
if (!ofw_bus_is_compatible(dev, "gpio-keys"))
return (ENXIO);
device_set_desc(dev, "GPIO keyboard");
return (0);
}
static int
gpiokeys_attach(device_t dev)
{
int unit;
struct gpiokeys_softc *sc;
keyboard_t *kbd;
phandle_t keys, child;
int total_keys;
if ((keys = ofw_bus_get_node(dev)) == -1)
return (ENXIO);
sc = device_get_softc(dev);
sc->sc_dev = dev;
kbd = &sc->sc_kbd;
GPIOKEYS_LOCK_INIT(sc);
unit = device_get_unit(dev);
kbd_init_struct(kbd, KBD_DRIVER_NAME, KB_OTHER, unit, 0, 0, 0);
kbd->kb_data = (void *)sc;
sc->sc_mode = K_XLATE;
sc->sc_keymap = key_map;
sc->sc_accmap = accent_map;
kbd_set_maps(kbd, &sc->sc_keymap, &sc->sc_accmap,
sc->sc_fkeymap, GPIOKEYS_GLOBAL_NFKEY);
KBD_FOUND_DEVICE(kbd);
gpiokeys_clear_state(kbd);
KBD_PROBE_DONE(kbd);
KBD_INIT_DONE(kbd);
if (kbd_register(kbd) < 0) {
goto detach;
}
KBD_CONFIG_DONE(kbd);
gpiokeys_enable(kbd);
#ifdef KBD_INSTALL_CDEV
if (kbd_attach(kbd)) {
goto detach;
}
#endif
if (bootverbose) {
genkbd_diag(kbd, 1);
}
total_keys = 0;
/* Traverse the 'gpio-keys' node and count keys */
for (child = OF_child(keys); child != 0; child = OF_peer(child)) {
if (!OF_hasprop(child, "gpios"))
continue;
total_keys++;
}
if (total_keys) {
sc->sc_keys = malloc(sizeof(struct gpiokey) * total_keys,
M_DEVBUF, M_WAITOK | M_ZERO);
sc->sc_total_keys = 0;
/* Traverse the 'gpio-keys' node and count keys */
for (child = OF_child(keys); child != 0; child = OF_peer(child)) {
if (!OF_hasprop(child, "gpios"))
continue;
gpiokeys_attach_key(sc, child ,&sc->sc_keys[sc->sc_total_keys]);
sc->sc_total_keys++;
}
}
return (0);
detach:
gpiokeys_detach(dev);
return (ENXIO);
}
static int
gpiokeys_detach(device_t dev)
{
struct gpiokeys_softc *sc;
keyboard_t *kbd;
int i;
sc = device_get_softc(dev);
for (i = 0; i < sc->sc_total_keys; i++)
gpiokeys_detach_key(sc, &sc->sc_keys[i]);
kbd = kbd_get_keyboard(kbd_find_keyboard(KBD_DRIVER_NAME,
device_get_unit(dev)));
#ifdef KBD_INSTALL_CDEV
kbd_detach(kbd);
#endif
kbd_unregister(kbd);
GPIOKEYS_LOCK_DESTROY(sc);
if (sc->sc_keys)
free(sc->sc_keys, M_DEVBUF);
return (0);
}
/* early keyboard probe, not supported */
static int
gpiokeys_configure(int flags)
{
return (0);
}
/* detect a keyboard, not used */
static int
gpiokeys__probe(int unit, void *arg, int flags)
{
return (ENXIO);
}
/* reset and initialize the device, not used */
static int
gpiokeys_init(int unit, keyboard_t **kbdp, void *arg, int flags)
{
return (ENXIO);
}
/* test the interface to the device, not used */
static int
gpiokeys_test_if(keyboard_t *kbd)
{
return (0);
}
/* finish using this keyboard, not used */
static int
gpiokeys_term(keyboard_t *kbd)
{
return (ENXIO);
}
/* keyboard interrupt routine, not used */
static int
gpiokeys_intr(keyboard_t *kbd, void *arg)
{
return (0);
}
/* lock the access to the keyboard, not used */
static int
gpiokeys_lock(keyboard_t *kbd, int lock)
{
return (1);
}
/*
* Enable the access to the device; until this function is called,
* the client cannot read from the keyboard.
*/
static int
gpiokeys_enable(keyboard_t *kbd)
{
struct gpiokeys_softc *sc;
sc = kbd->kb_data;
GPIOKEYS_LOCK(sc);
KBD_ACTIVATE(kbd);
GPIOKEYS_UNLOCK(sc);
return (0);
}
/* disallow the access to the device */
static int
gpiokeys_disable(keyboard_t *kbd)
{
struct gpiokeys_softc *sc;
sc = kbd->kb_data;
GPIOKEYS_LOCK(sc);
KBD_DEACTIVATE(kbd);
GPIOKEYS_UNLOCK(sc);
return (0);
}
static void
gpiokeys_do_poll(struct gpiokeys_softc *sc, uint8_t wait)
{
KASSERT((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0,
("gpiokeys_do_poll called when not polling\n"));
GPIOKEYS_ASSERT_LOCKED(sc);
if (!kdb_active && !SCHEDULER_STOPPED()) {
while (sc->sc_inputs == 0) {
kern_yield(PRI_UNCHANGED);
if (!wait)
break;
}
return;
}
while ((sc->sc_inputs == 0) && wait) {
printf("POLL!\n");
}
}
/* check if data is waiting */
static int
gpiokeys_check(keyboard_t *kbd)
{
struct gpiokeys_softc *sc = kbd->kb_data;
GPIOKEYS_ASSERT_LOCKED(sc);
if (!KBD_IS_ACTIVE(kbd))
return (0);
if (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING)
gpiokeys_do_poll(sc, 0);
if (sc->sc_inputs > 0) {
return (1);
}
return (0);
}
/* check if char is waiting */
static int
gpiokeys_check_char_locked(keyboard_t *kbd)
{
if (!KBD_IS_ACTIVE(kbd))
return (0);
return (gpiokeys_check(kbd));
}
static int
gpiokeys_check_char(keyboard_t *kbd)
{
int result;
struct gpiokeys_softc *sc = kbd->kb_data;
GPIOKEYS_LOCK(sc);
result = gpiokeys_check_char_locked(kbd);
GPIOKEYS_UNLOCK(sc);
return (result);
}
static int32_t
gpiokeys_get_key(struct gpiokeys_softc *sc, uint8_t wait)
{
int32_t c;
KASSERT((!kdb_active && !SCHEDULER_STOPPED())
|| (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0,
("not polling in kdb or panic\n"));
GPIOKEYS_ASSERT_LOCKED(sc);
if (sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING)
gpiokeys_do_poll(sc, wait);
if (sc->sc_inputs == 0) {
c = -1;
} else {
c = sc->sc_input[sc->sc_inputhead];
--(sc->sc_inputs);
++(sc->sc_inputhead);
if (sc->sc_inputhead >= GPIOKEYS_GLOBAL_IN_BUF_SIZE) {
sc->sc_inputhead = 0;
}
}
return (c);
}
/* read one byte from the keyboard if it's allowed */
static int
gpiokeys_read(keyboard_t *kbd, int wait)
{
struct gpiokeys_softc *sc = kbd->kb_data;
int32_t keycode;
if (!KBD_IS_ACTIVE(kbd))
return (-1);
/* XXX */
keycode = gpiokeys_get_key(sc, (wait == FALSE) ? 0 : 1);
if (!KBD_IS_ACTIVE(kbd) || (keycode == -1))
return (-1);
++(kbd->kb_count);
return (keycode);
}
/* read char from the keyboard */
static uint32_t
gpiokeys_read_char_locked(keyboard_t *kbd, int wait)
{
struct gpiokeys_softc *sc = kbd->kb_data;
uint32_t action;
uint32_t keycode;
if (!KBD_IS_ACTIVE(kbd))
return (NOKEY);
next_code:
/* see if there is something in the keyboard port */
/* XXX */
keycode = gpiokeys_get_key(sc, (wait == FALSE) ? 0 : 1);
++kbd->kb_count;
/* return the byte as is for the K_RAW mode */
if (sc->sc_mode == K_RAW) {
return (keycode);
}
/* return the key code in the K_CODE mode */
/* XXX: keycode |= SCAN_RELEASE; */
if (sc->sc_mode == K_CODE) {
return (keycode);
}
/* keycode to key action */
action = genkbd_keyaction(kbd, SCAN_CHAR(keycode),
(keycode & SCAN_RELEASE),
&sc->sc_state, &sc->sc_accents);
if (action == NOKEY) {
goto next_code;
}
return (action);
}
/* Currently wait is always false. */
static uint32_t
gpiokeys_read_char(keyboard_t *kbd, int wait)
{
uint32_t keycode;
struct gpiokeys_softc *sc = kbd->kb_data;
GPIOKEYS_LOCK(sc);
keycode = gpiokeys_read_char_locked(kbd, wait);
GPIOKEYS_UNLOCK(sc);
return (keycode);
}
/* some useful control functions */
static int
gpiokeys_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
{
struct gpiokeys_softc *sc = kbd->kb_data;
#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
int ival;
#endif
switch (cmd) {
case KDGKBMODE: /* get keyboard mode */
*(int *)arg = sc->sc_mode;
break;
#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
case _IO('K', 7):
ival = IOCPARM_IVAL(arg);
arg = (caddr_t)&ival;
/* FALLTHROUGH */
#endif
case KDSKBMODE: /* set keyboard mode */
switch (*(int *)arg) {
case K_XLATE:
if (sc->sc_mode != K_XLATE) {
/* make lock key state and LED state match */
sc->sc_state &= ~LOCK_MASK;
sc->sc_state |= KBD_LED_VAL(kbd);
}
/* FALLTHROUGH */
case K_RAW:
case K_CODE:
if (sc->sc_mode != *(int *)arg) {
if ((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) == 0)
gpiokeys_clear_state(kbd);
sc->sc_mode = *(int *)arg;
}
break;
default:
return (EINVAL);
}
break;
case KDGETLED: /* get keyboard LED */
*(int *)arg = KBD_LED_VAL(kbd);
break;
#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
case _IO('K', 66):
ival = IOCPARM_IVAL(arg);
arg = (caddr_t)&ival;
/* FALLTHROUGH */
#endif
case KDSETLED: /* set keyboard LED */
KBD_LED_VAL(kbd) = *(int *)arg;
break;
case KDGKBSTATE: /* get lock key state */
*(int *)arg = sc->sc_state & LOCK_MASK;
break;
#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
case _IO('K', 20):
ival = IOCPARM_IVAL(arg);
arg = (caddr_t)&ival;
/* FALLTHROUGH */
#endif
case KDSKBSTATE: /* set lock key state */
if (*(int *)arg & ~LOCK_MASK) {
return (EINVAL);
}
sc->sc_state &= ~LOCK_MASK;
sc->sc_state |= *(int *)arg;
return (0);
case KDSETREPEAT: /* set keyboard repeat rate (new
* interface) */
if (!KBD_HAS_DEVICE(kbd)) {
return (0);
}
if (((int *)arg)[1] < 0) {
return (EINVAL);
}
if (((int *)arg)[0] < 0) {
return (EINVAL);
}
if (((int *)arg)[0] < 200) /* fastest possible value */
kbd->kb_delay1 = 200;
else
kbd->kb_delay1 = ((int *)arg)[0];
kbd->kb_delay2 = ((int *)arg)[1];
return (0);
#if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
case _IO('K', 67):
ival = IOCPARM_IVAL(arg);
arg = (caddr_t)&ival;
/* FALLTHROUGH */
#endif
case KDSETRAD: /* set keyboard repeat rate (old
* interface) */
return (gpiokeys_set_typematic(kbd, *(int *)arg));
case PIO_KEYMAP: /* set keyboard translation table */
case OPIO_KEYMAP: /* set keyboard translation table
* (compat) */
case PIO_KEYMAPENT: /* set keyboard translation table
* entry */
case PIO_DEADKEYMAP: /* set accent key translation table */
sc->sc_accents = 0;
/* FALLTHROUGH */
default:
return (genkbd_commonioctl(kbd, cmd, arg));
}
return (0);
}
static int
gpiokeys_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
{
int result;
struct gpiokeys_softc *sc;
sc = kbd->kb_data;
/*
* XXX Check if someone is calling us from a critical section:
*/
if (curthread->td_critnest != 0)
return (EDEADLK);
GPIOKEYS_LOCK(sc);
result = gpiokeys_ioctl_locked(kbd, cmd, arg);
GPIOKEYS_UNLOCK(sc);
return (result);
}
/* clear the internal state of the keyboard */
static void
gpiokeys_clear_state(keyboard_t *kbd)
{
struct gpiokeys_softc *sc = kbd->kb_data;
sc->sc_flags &= ~(GPIOKEYS_GLOBAL_FLAG_POLLING);
sc->sc_state &= LOCK_MASK; /* preserve locking key state */
sc->sc_accents = 0;
}
/* get the internal state, not used */
static int
gpiokeys_get_state(keyboard_t *kbd, void *buf, size_t len)
{
return (len == 0) ? 1 : -1;
}
/* set the internal state, not used */
static int
gpiokeys_set_state(keyboard_t *kbd, void *buf, size_t len)
{
return (EINVAL);
}
static int
gpiokeys_poll(keyboard_t *kbd, int on)
{
struct gpiokeys_softc *sc = kbd->kb_data;
GPIOKEYS_LOCK(sc);
if (on)
sc->sc_flags |= GPIOKEYS_GLOBAL_FLAG_POLLING;
else
sc->sc_flags &= ~GPIOKEYS_GLOBAL_FLAG_POLLING;
GPIOKEYS_UNLOCK(sc);
return (0);
}
static int
gpiokeys_set_typematic(keyboard_t *kbd, int code)
{
static const int delays[] = {250, 500, 750, 1000};
static const 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};
if (code & ~0x7f) {
return (EINVAL);
}
kbd->kb_delay1 = delays[(code >> 5) & 3];
kbd->kb_delay2 = rates[code & 0x1f];
return (0);
}
static void
gpiokeys_event_keyinput(struct gpiokeys_softc *sc)
{
int c;
if ((sc->sc_flags & GPIOKEYS_GLOBAL_FLAG_POLLING) != 0)
return;
if (KBD_IS_ACTIVE(&sc->sc_kbd) &&
KBD_IS_BUSY(&sc->sc_kbd)) {
/* let the callback function process the input */
(sc->sc_kbd.kb_callback.kc_func) (&sc->sc_kbd, KBDIO_KEYINPUT,
sc->sc_kbd.kb_callback.kc_arg);
} else {
/* read and discard the input, no one is waiting for it */
do {
c = gpiokeys_read_char(&sc->sc_kbd, 0);
} while (c != NOKEY);
}
}
static keyboard_switch_t gpiokeyssw = {
.probe = &gpiokeys__probe,
.init = &gpiokeys_init,
.term = &gpiokeys_term,
.intr = &gpiokeys_intr,
.test_if = &gpiokeys_test_if,
.enable = &gpiokeys_enable,
.disable = &gpiokeys_disable,
.read = &gpiokeys_read,
.check = &gpiokeys_check,
.read_char = &gpiokeys_read_char,
.check_char = &gpiokeys_check_char,
.ioctl = &gpiokeys_ioctl,
.lock = &gpiokeys_lock,
.clear_state = &gpiokeys_clear_state,
.get_state = &gpiokeys_get_state,
.set_state = &gpiokeys_set_state,
.get_fkeystr = &genkbd_get_fkeystr,
.poll = &gpiokeys_poll,
.diag = &genkbd_diag,
};
KEYBOARD_DRIVER(gpiokeys, gpiokeyssw, gpiokeys_configure);
static int
gpiokeys_driver_load(module_t mod, int what, void *arg)
{
switch (what) {
case MOD_LOAD:
kbd_add_driver(&gpiokeys_kbd_driver);
break;
case MOD_UNLOAD:
kbd_delete_driver(&gpiokeys_kbd_driver);
break;
}
return (0);
}
static devclass_t gpiokeys_devclass;
static device_method_t gpiokeys_methods[] = {
DEVMETHOD(device_probe, gpiokeys_probe),
DEVMETHOD(device_attach, gpiokeys_attach),
DEVMETHOD(device_detach, gpiokeys_detach),
DEVMETHOD_END
};
static driver_t gpiokeys_driver = {
"gpiokeys",
gpiokeys_methods,
sizeof(struct gpiokeys_softc),
};
DRIVER_MODULE(gpiokeys, simplebus, gpiokeys_driver, gpiokeys_devclass, gpiokeys_driver_load, 0);
MODULE_VERSION(gpiokeys, 1);