NetBSD-5.0.2/sys/arch/hpcsh/dev/j6x0pwr.c
/* $NetBSD: j6x0pwr.c,v 1.14 2008/03/27 03:34:14 uwe Exp $ */
/*
* Copyright (c) 2003, 2006 Valeriy E. Ushakov
* 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: j6x0pwr.c,v 1.14 2008/03/27 03:34:14 uwe Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <dev/apm/apmbios.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>
#include <machine/config_hook.h>
#include <sh3/exception.h>
#include <sh3/intcreg.h>
#include <sh3/pfcreg.h>
#include <sh3/dev/adcvar.h>
/* SH7709 PFC bits pertinent to Jornada 6x0 power */
#define PGDR_MAIN_BATTERY_OUT 0x04
#define PGDR_LID_OPEN 0x01
#define PJDR_AC_POWER_OUT 0x10
#define PLDR_BATTERY_CHARGED 0x20
static inline int __attribute__((__always_inline__))
j6x0pwr_battery_is_absent(void)
{
return _reg_read_1(SH7709_PGDR) & PGDR_MAIN_BATTERY_OUT;
}
static inline int __attribute__((__always_inline__))
j6x0pwr_ac_is_off(void)
{
return _reg_read_1(SH7709_PJDR) & PJDR_AC_POWER_OUT;
}
static inline int __attribute__((__always_inline__))
j6x0pwr_is_not_charging(void)
{
return _reg_read_1(SH7709_PLDR) & PLDR_BATTERY_CHARGED;
}
/* A/D converter channels to get power stats from */
#define ADC_CHANNEL_BATTERY 3 /* main battery */
#define ADC_CHANNEL_BACKUP 4 /* backup battery - we don't report it */
#define ADC_CHANNEL_CHARGE 5 /* we use PLDR_BATTERY_CHARGED instead */
/*
* Empirical range of battery values.
* Thanks to Joseph Heenan for measurements.
*/
#define J6X0PWR_BATTERY_MIN 630
#define J6X0PWR_BATTERY_CRITICAL 635
#define J6X0PWR_BATTERY_LOW 645
#define J6X0PWR_BATTERY_FULL 910 /* can be slightly more */
/* Convenience aliases (XXX: should be provided by config_hook.h) */
#define CONFIG_HOOK_BUTTON_PRESSED ((void *)1)
#define CONFIG_HOOK_BUTTON_RELEASED ((void *)0)
/* allow only one instance */
static int j6x0pwr_attached = 0;
struct j6x0pwr_softc {
device_t sc_dev;
void *sc_ih;
volatile int sc_poweroff;
};
static int j6x0pwr_match(device_t, cfdata_t, void *);
static void j6x0pwr_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(j6x0pwr, sizeof(struct j6x0pwr_softc),
j6x0pwr_match, j6x0pwr_attach, NULL, NULL);
static int j6x0pwr_apm_getpower_hook(void *, int, long, void *);
static int j6x0pwr_get_battery(void); /* from ADC */
static int j6x0pwr_intr(void *);
static void j6x0pwr_sleep(void *);
static int j6x0pwr_clear_interrupt(void);
static int
j6x0pwr_match(device_t parent, cfdata_t cfp, void *aux)
{
/*
* XXX: does platid_mask_MACH_HP_LX matches _JORNADA_6XX too?
* Is 620 wired similarly?
*/
if (!platid_match(&platid, &platid_mask_MACH_HP_JORNADA_6XX))
return 0;
if (strcmp(cfp->cf_name, "j6x0pwr") != 0)
return 0;
/* allow only one instance */
return !j6x0pwr_attached;
}
static void
j6x0pwr_attach(device_t parent, device_t self, void *aux)
{
struct j6x0pwr_softc *sc;
/* XXX: in machdep.c */
extern void (*__sleep_func)(void *);
extern void *__sleep_ctx;
sc = device_private(self);
sc->sc_dev = self;
aprint_naive("\n");
aprint_normal("\n");
/* allow only one instance */
j6x0pwr_attached = 1;
/* arrange for hpcapm to call us when power status is requested */
config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_ACADAPTER,
CONFIG_HOOK_EXCLUSIVE,
j6x0pwr_apm_getpower_hook, sc);
config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CHARGE,
CONFIG_HOOK_EXCLUSIVE,
j6x0pwr_apm_getpower_hook, sc);
config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BATTERYVAL,
CONFIG_HOOK_EXCLUSIVE,
j6x0pwr_apm_getpower_hook, sc);
/* register sleep function to APM */
__sleep_func = j6x0pwr_sleep;
__sleep_ctx = sc;
sc->sc_poweroff = 0;
/* drain the old interrupt */
j6x0pwr_clear_interrupt();
sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY,
j6x0pwr_intr, sc);
_reg_write_1(SH7709_PKDR, 0); /* Green LED on */
}
/*
* Triggered when the On/Off button is pressed or the lid is closed.
* The state of the lid is reflected in the bit PGDR[0].
* Closing the lid can trigger several consecutive interrupts.
*
* XXX: Since we don't put the machine to sleep, I have no idea how
* wakeup interrupt(s) look like. Need to revisit when software
* suspend is added to the kernel (which we need to support ACPI).
*/
static int
j6x0pwr_intr(void *arg)
{
struct j6x0pwr_softc *sc = arg;
device_t self = sc->sc_dev;
uint8_t irr0;
uint8_t pgdr;
irr0 = j6x0pwr_clear_interrupt();
if ((irr0 & IRR0_IRQ0) == 0) {
#ifdef DIAGNOSTIC
aprint_normal_dev(self, "irr0=0x%02x?\n", irr0);
#endif
return 0;
}
pgdr = _reg_read_1(SH7709_PGDR);
if ((pgdr & PGDR_LID_OPEN) == 0) {
aprint_normal_dev(self, "lid closed %d\n", sc->sc_poweroff);
if (sc->sc_poweroff)
return 1;
} else {
aprint_normal_dev(self, "ON/OFF %d\n", sc->sc_poweroff);
if (sc->sc_poweroff)
sc->sc_poweroff = 0;
}
config_hook_call(CONFIG_HOOK_BUTTONEVENT,
CONFIG_HOOK_BUTTONEVENT_POWER,
CONFIG_HOOK_BUTTON_PRESSED);
/* fake release */
config_hook_call(CONFIG_HOOK_BUTTONEVENT,
CONFIG_HOOK_BUTTONEVENT_POWER,
CONFIG_HOOK_BUTTON_RELEASED);
return 1;
}
static int
j6x0pwr_clear_interrupt(void)
{
uint8_t irr0;
irr0 = _reg_read_1(SH7709_IRR0);
if (irr0 & IRR0_IRQ0)
_reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ0);
return irr0;
}
void
j6x0pwr_sleep(void *arg)
{
/* splhigh on entry */
struct j6x0pwr_softc *sc = arg;
int s;
/* Reinstall j6x0pwr_intr as a wakeup handler */
intc_intr_disestablish(sc->sc_ih);
sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_HIGH,
j6x0pwr_intr, sc);
sc->sc_poweroff = 1;
do {
/* Disable interrupt except for power button. */
s = _cpu_intr_resume(IPL_CLOCK << 4);
_reg_write_1(SH7709_PKDR, 0xff); /* Green LED off */
__asm volatile("sleep");
_reg_write_1(SH7709_PKDR, 0); /* Green LED on */
_cpu_intr_resume(s);
} while (sc->sc_poweroff);
/* Return to normal power button */
intc_intr_disestablish(sc->sc_ih);
sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY,
j6x0pwr_intr, sc);
/* splhigh on exit */
}
static int
j6x0pwr_apm_getpower_hook(void *ctx, int type, long id, void *msg)
{
/* struct j6x0pwr_softc * const sc = ctx; */
int * const pval = msg;
int battery, state;
if (type != CONFIG_HOOK_GET)
return EINVAL;
switch (id) {
case CONFIG_HOOK_ACADAPTER:
*pval = j6x0pwr_ac_is_off() ? APM_AC_OFF : APM_AC_ON;
return 0;
case CONFIG_HOOK_CHARGE:
if (j6x0pwr_battery_is_absent())
state = APM_BATT_FLAG_NO_SYSTEM_BATTERY;
else {
battery = j6x0pwr_get_battery();
if (battery < J6X0PWR_BATTERY_CRITICAL)
state = APM_BATT_FLAG_CRITICAL;
else if (battery < J6X0PWR_BATTERY_LOW)
state = APM_BATT_FLAG_LOW;
else
state = APM_BATT_FLAG_HIGH; /* XXX? */
if (!j6x0pwr_is_not_charging())
state |= APM_BATT_FLAG_CHARGING;
}
*pval = state;
return 0;
case CONFIG_HOOK_BATTERYVAL:
if (j6x0pwr_battery_is_absent())
state = 0;
else {
battery = j6x0pwr_get_battery();
if (battery > J6X0PWR_BATTERY_FULL)
state = 100;
else
state = 100 * (battery - J6X0PWR_BATTERY_MIN)
/ (J6X0PWR_BATTERY_FULL
- J6X0PWR_BATTERY_MIN);
}
*pval = state;
return 0;
}
return EINVAL;
}
static int
j6x0pwr_get_battery(void)
{
int battery;
int s;
if (j6x0pwr_battery_is_absent())
return -1;
s = spltty();
battery = adc_sample_channel(ADC_CHANNEL_BATTERY);
splx(s);
return battery;
}