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/* $OpenBSD: clkbrd.c,v 1.2 2004/09/28 14:34:58 miod Exp $ */
/*
* Copyright (c) 2004 Jason L. Wright (jason@thought.net)
* 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 ``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/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/timeout.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <sparc64/dev/fhcvar.h>
#include <sparc64/dev/clkbrdreg.h>
#include <sparc64/dev/clkbrdvar.h>
extern int sparc_led_blink;
int clkbrd_match(struct device *, void *, void *);
void clkbrd_attach(struct device *, struct device *, void *);
struct cfattach clkbrd_ca = {
sizeof(struct clkbrd_softc), clkbrd_match, clkbrd_attach
};
struct cfdriver clkbrd_cd = {
NULL, "clkbrd", DV_DULL
};
int
clkbrd_match(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct fhc_attach_args *fa = aux;
if (strcmp(fa->fa_name, "clock-board") == 0)
return (1);
return (0);
}
void
clkbrd_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct clkbrd_softc *sc = (struct clkbrd_softc *)self;
struct fhc_attach_args *fa = aux;
int i, slots;
u_int8_t r;
sc->sc_bt = fa->fa_bustag;
timeout_set(&sc->sc_to, clkbrd_led_blink, sc);
if (fa->fa_nreg < 1) {
printf(": no registers\n");
return;
}
if (fhc_bus_map(sc->sc_bt, fa->fa_reg[0].fbr_slot,
fa->fa_reg[0].fbr_offset, fa->fa_reg[0].fbr_size, 0,
&sc->sc_creg)) {
printf(": can't map ctrl regs\n");
return;
}
if (fa->fa_nreg > 2) {
if (fhc_bus_map(sc->sc_bt, fa->fa_reg[2].fbr_slot,
fa->fa_reg[2].fbr_offset, fa->fa_reg[2].fbr_size, 0,
&sc->sc_vreg)) {
printf(": can't map vreg\n");
return;
}
sc->sc_has_vreg = 1;
}
r = bus_space_read_1(sc->sc_bt, sc->sc_creg, CLK_STS1);
switch (r & 0xc0) {
case 0x40:
slots = 16;
break;
case 0xc0:
slots = 8;
break;
case 0x80:
if (sc->sc_has_vreg) {
r = bus_space_read_1(sc->sc_bt, sc->sc_vreg, 0);
if (r != 0) {
if (r & 0x80)
slots = 4;
else
slots = 5;
break;
}
}
default:
slots = 4;
}
printf(": %d slots\n", slots);
for (i = 0; i < fa->fa_nreg; i++) {
printf(" r[%d] slot %x offset %x size %x\n",
i, fa->fa_reg[i].fbr_slot, fa->fa_reg[i].fbr_offset,
fa->fa_reg[i].fbr_size);
}
if (sparc_led_blink)
clkbrd_led_blink(sc);
}
void
clkbrd_led_blink(void *vsc)
{
struct clkbrd_softc *sc = vsc;
int i, s;
u_int8_t r;
if (sc == NULL) {
for (i = 0; i < clkbrd_cd.cd_ndevs; i++) {
sc = clkbrd_cd.cd_devs[i];
if (sc != NULL)
clkbrd_led_blink(sc);
}
return;
}
s = splhigh();
r = bus_space_read_1(sc->sc_bt, sc->sc_creg, CLK_CTRL);
r ^= CLK_CTRL_RLED;
bus_space_write_1(sc->sc_bt, sc->sc_creg, CLK_CTRL, r);
bus_space_read_1(sc->sc_bt, sc->sc_creg, CLK_CTRL);
splx(s);
if (!sparc_led_blink)
return;
/*
* Blink rate is:
* full cycle every second if completely idle (loadav = 0)
* full cycle every 2 seconds if loadav = 1
* full cycle every 3 seconds if loadav = 2
* etc.
*/
s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1));
timeout_add(&sc->sc_to, s);
}
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