/* $NetBSD: obsled.c,v 1.12 2024/09/07 06:17:38 andvar Exp $ */
/*
* Copyright (c) 2004 Shigeyuki Fukushima.
* 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.
* 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: obsled.c,v 1.12 2024/09/07 06:17:38 andvar Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <machine/obs266.h>
#include <powerpc/ibm4xx/dev/gpiovar.h>
struct obsled_softc {
device_t sc_dev;
gpio_tag_t sc_tag;
int sc_addr;
int sc_led_state; /* LED status (ON=1/OFF=0) */
int sc_led_state_mib;
};
static void obsled_attach(device_t, device_t, void *);
static int obsled_match(device_t, cfdata_t, void *);
static int obsled_sysctl_verify(SYSCTLFN_PROTO);
static void obsled_set_state(struct obsled_softc *);
CFATTACH_DECL_NEW(obsled, sizeof(struct obsled_softc),
obsled_match, obsled_attach, NULL, NULL);
static int
obsled_match(device_t parent, cfdata_t cf, void *aux)
{
struct gpio_attach_args *ga = aux;
/* XXX: support only OpenBlockS266 LED */
if (ga->ga_addr == OBS266_GPIO_LED1)
return (1);
else if (ga->ga_addr == OBS266_GPIO_LED2)
return (1);
else if (ga->ga_addr == OBS266_GPIO_LED4)
return (1);
return (0);
}
static void
obsled_attach(device_t parent, device_t self, void *aux)
{
struct obsled_softc *sc = device_private(self);
struct gpio_attach_args *ga = aux;
struct sysctlnode *node;
int err, node_mib;
char led_name[5];
/* int led = (1 << device_unit(sc->sc_dev)); */
snprintf(led_name, sizeof(led_name),
"led%d", (1 << device_unit(sc->sc_dev)) & 0x7);
aprint_naive(": OpenBlockS %s\n", led_name);
aprint_normal(": OpenBlockS %s\n", led_name);
sc->sc_dev = self;
sc->sc_tag = ga->ga_tag;
sc->sc_addr = ga->ga_addr;
sc->sc_led_state = 0;
obs266_led_set(OBS266_LED_OFF);
/* add sysctl interface */
err = sysctl_createv(NULL, 0,
NULL, (const struct sysctlnode **)&node,
0, CTLTYPE_NODE,
"obsled",
NULL,
NULL, 0, NULL, 0,
CTL_HW, CTL_CREATE, CTL_EOL);
if (err != 0)
return;
node_mib = node->sysctl_num;
err = sysctl_createv(NULL, 0,
NULL, (const struct sysctlnode **)&node,
CTLFLAG_READWRITE, CTLTYPE_INT,
led_name,
SYSCTL_DESCR("OpenBlockS LED state (0=off, 1=on)"),
obsled_sysctl_verify, 0, (void *)sc, 0,
CTL_HW, node_mib, CTL_CREATE, CTL_EOL);
if (err != 0)
return;
sc->sc_led_state_mib = node->sysctl_num;
#if 0
{
gpio_tag_t tag = sc->sc_tag;
(*(tag)->io_or_write)((tag)->cookie, sc->sc_addr, 0);
}
#endif
}
static int
obsled_sysctl_verify(SYSCTLFN_ARGS)
{
struct obsled_softc *sc = rnode->sysctl_data;
struct sysctlnode node;
int err, state;
node = *rnode;
state = sc->sc_led_state;
node.sysctl_data = &state;
err = sysctl_lookup(SYSCTLFN_CALL(&node));
if (err != 0 || newp == NULL)
return err;
if (node.sysctl_num == sc->sc_led_state_mib) {
if (state < 0 || state > 1)
return EINVAL;
sc->sc_led_state = state;
obsled_set_state(sc);
}
return 0;
}
static void
obsled_set_state(struct obsled_softc *sc)
{
gpio_tag_t tag = sc->sc_tag;
(*(tag)->io_or_write)((tag)->cookie,
sc->sc_addr,
(~(sc->sc_led_state) & 1));
/* GPIO LED input ON=0/OFF=1 */
}
/*
* Setting LED interface for inside kernel.
* Argument `led' is 3-bit LED state (led=0-7/ON=1/OFF=0).
*/
void
obs266_led_set(int led)
{
device_t dv;
deviter_t di;
/*
* Searching "obsled" devices from device tree.
* Do you have a better idea?
*/
for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); dv != NULL;
dv = deviter_next(&di)) {
if (device_is_a(dv, "obsles")) {
struct obsled_softc *sc = device_private(dv);
sc->sc_led_state =
(led & (1 << device_unit(dv))) >> device_unit(dv);
obsled_set_state(sc);
}
}
deviter_release(&di);
}
