void
zapm_shutdown(void *v)
{
struct zapm_softc *sc = v;
zapm_enable_charging(sc, 0);
}
/*
* Return non-zero if the charge complete signal indicates that the
* battery is fully charged. Restart charging to clear this signal.
*/
int
zapm_charge_complete(struct zapm_softc *sc)
{
if (sc->sc_charging && sc->sc_batt_full < MIN_BATT_FULL) {
if (pxa2x0_gpio_get_bit(GPIO_CHRG_CO_C3000) != 0) {
if (++sc->sc_batt_full < MIN_BATT_FULL) {
DPRINTF(("battery almost full\n"));
zapm_enable_charging(sc, 0);
delay(15000);
zapm_enable_charging(sc, 1);
}
} else if (sc->sc_batt_full > 0) {
/* false alarm */
sc->sc_batt_full = 0;
zapm_enable_charging(sc, 0);
delay(15000);
zapm_enable_charging(sc, 1);
}
}
return (sc->sc_batt_full >= MIN_BATT_FULL);
}
int
apm_activate(struct device *self, int act)
{
struct zapm_softc *sc = (struct zapm_softc *)self;
int ret = 0;
switch (act) {
case DVACT_POWERDOWN:
zapm_enable_charging(sc, 0);
break;
}
return (ret);
}
void
apm_attach(struct device *parent, struct device *self, void *aux)
{
struct zapm_softc *sc = (struct zapm_softc *)self;
pxa2x0_gpio_set_function(GPIO_AC_IN_C3000, GPIO_IN);
pxa2x0_gpio_set_function(GPIO_CHRG_CO_C3000, GPIO_IN);
pxa2x0_gpio_set_function(GPIO_BATT_COVER_C3000, GPIO_IN);
(void)pxa2x0_gpio_intr_establish(GPIO_AC_IN_C3000,
IST_EDGE_BOTH, IPL_BIO, zapm_acintr, sc, "apm_ac");
(void)pxa2x0_gpio_intr_establish(GPIO_BATT_COVER_C3000,
IST_EDGE_BOTH, IPL_BIO, zapm_bcintr, sc, "apm_bc");
sc->sc_event = APM_NOEVENT;
sc->sc.sc_get_event = zapm_get_event;
sc->sc.sc_power_info = zapm_power_info;
sc->sc.sc_suspend = zapm_suspend;
sc->sc.sc_resume = zapm_resume;
timeout_set(&sc->sc_poll, &zapm_poll, sc);
/* Get initial battery voltage. */
zapm_enable_charging(sc, 0);
if (zapm_ac_on()) {
/* C3000: discharge 100 ms when AC is on. */
scoop_discharge_battery(1);
delay(100000);
}
sc->sc_batt_volt = zapm_batt_volt();
scoop_discharge_battery(0);
pxa2x0_apm_attach_sub(&sc->sc);
#if 0
(void)shutdownhook_establish(zapm_shutdown, NULL);
#endif
cpu_setperf = pxa2x0_setperf;
cpu_cpuspeed = pxa2x0_cpuspeed;
}
/*
* Poll power-management related GPIO inputs, update battery life
* in softc, and/or control battery charging.
*/
void
zapm_poll(void *v)
{
struct zapm_softc *sc = v;
int ac_on;
int bc_lock;
int charging;
int volt;
int s;
s = splhigh();
/* Check positition of battery compartment lock switch. */
bc_lock = pxa2x0_gpio_get_bit(GPIO_BATT_COVER_C3000) ? 1 : 0;
/* Stop discharging. */
if (sc->sc_discharging) {
sc->sc_discharging = 0;
volt = zapm_batt_volt();
ac_on = zapm_ac_on();
charging = 0;
DPRINTF(("zapm_poll: discharge off volt %d\n", volt));
} else {
ac_on = zapm_ac_on();
charging = sc->sc_charging;
volt = sc->sc_batt_volt;
}
/* Start or stop charging as necessary. */
if (ac_on && bc_lock) {
if (charging) {
if (zapm_charge_complete(sc)) {
DPRINTF(("zapm_poll: batt full\n"));
charging = 0;
zapm_enable_charging(sc, 0);
}
} else if (!zapm_charge_complete(sc)) {
charging = 1;
volt = zapm_batt_volt();
zapm_enable_charging(sc, 1);
DPRINTF(("zapm_poll: start charging volt %d\n", volt));
}
} else {
if (charging) {
charging = 0;
zapm_enable_charging(sc, 0);
timerclear(&sc->sc_lastbattchk);
DPRINTF(("zapm_poll: stop charging\n"));
}
sc->sc_batt_full = 0;
}
/*
* Restart charging once in a while. Discharge a few milliseconds
* before updating the voltage in our softc if A/C is connected.
*/
if (bc_lock && ratecheck(&sc->sc_lastbattchk, &zapm_battchkrate)) {
if (sc->sc_suspended) {
DPRINTF(("zapm_poll: suspended %lu %lu\n",
sc->sc_lastbattchk.tv_sec,
pxa2x0_rtc_getsecs()));
if (charging) {
zapm_enable_charging(sc, 0);
delay(15000);
zapm_enable_charging(sc, 1);
pxa2x0_rtc_setalarm(pxa2x0_rtc_getsecs() +
zapm_battchkrate.tv_sec + 1);
}
} else if (ac_on && sc->sc_batt_full == 0) {
DPRINTF(("zapm_poll: discharge on\n"));
if (charging)
zapm_enable_charging(sc, 0);
sc->sc_discharging = 1;
scoop_discharge_battery(1);
timeout_add(&sc->sc_poll, DISCHARGE_TIMEOUT);
} else if (!ac_on) {
volt = zapm_batt_volt();
DPRINTF(("zapm_poll: volt %d\n", volt));
}
}
/* Update the cached power state in our softc. */
if (ac_on != sc->sc_ac_on || charging != sc->sc_charging ||
volt != sc->sc_batt_volt) {
sc->sc_ac_on = ac_on;
sc->sc_charging = charging;
sc->sc_batt_volt = volt;
if (sc->sc_event == APM_NOEVENT)
sc->sc_event = APM_POWER_CHANGE;
}
/* Detect battery low conditions. */
if (!ac_on) {
if (zapm_batt_life(volt) < 5)
sc->sc_event = APM_BATTERY_LOW;
if (zapm_batt_state(volt) == APM_BATT_CRITICAL)
sc->sc_event = APM_CRIT_SUSPEND_REQ;
}
#ifdef APMDEBUG
if (sc->sc_event != APM_NOEVENT)
DPRINTF(("zapm_poll: power event %d\n", sc->sc_event));
#endif
splx(s);
}
