Jornada 680/690 power &c. Doesn't do much useful at the moment, but
provides RTFS documentation on how things are wired in Jornada. Listens to "switch off" interrupt generated when On/Off button is pressed, or the lid is closed. Polls the status of main and backup batteries and warns if main battery is low.
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uwe
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/* $NetBSD: j6x0pwr.c,v 1.1 2003/10/18 01:38:39 uwe Exp $ */
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/*
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* Copyright (c) 2003 Valeriy E. Ushakov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#ifdef GPROF
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#include <sys/gmon.h>
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#endif
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#include <sh3/exception.h>
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#include <sh3/intcreg.h>
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#include <sh3/pfcreg.h>
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#include <machine/platid.h>
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#include <machine/platid_mask.h>
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/* SH7709_PGDR bits pertinent to Jornada 6x0 power */
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#define PGDR_MAIN_BATTERY_OUT 0x04
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#define PGDR_LID_OPEN 0x01
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/* A/D covnerter channels to get power stats from */
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#define ADC_CHANNEL_BATTERY 3
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#define ADC_CHANNEL_BACKUP 4
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#define ADC_CHANNEL_CHARGE 5
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/* warn that main battery is low after drops below this value */
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#define J6X0PWR_BATTERY_WARNING_THRESHOLD 200
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extern int adc_sample_channel(int); /* XXX: adcvar.h */
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struct j6x0pwr_softc {
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struct device sc_dev;
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struct callout sc_poll_ch;
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};
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static int j6x0pwr_match(struct device *, struct cfdata *, void *);
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static void j6x0pwr_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(j6x0pwr, sizeof(struct j6x0pwr_softc),
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j6x0pwr_match, j6x0pwr_attach, NULL, NULL);
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static int j6x0pwr_intr(void *);
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static void j6x0pwr_poll_callout(void *);
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static int
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j6x0pwr_match(struct device *parent, struct cfdata *cfp, void *aux)
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{
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/*
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* XXX: does platid_mask_MACH_HP_LX matches _JORNADA_6XX too?
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* Is 620 wired similarly?
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*/
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if (!platid_match(&platid, &platid_mask_MACH_HP_JORNADA_6XX))
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return (0);
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if (strcmp(cfp->cf_name, "j6x0pwr") != 0)
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return (0);
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return (1);
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}
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static void
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j6x0pwr_attach(struct device *parent, struct device *self, void *aux)
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{
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struct j6x0pwr_softc *sc = (struct j6x0pwr_softc *)self;
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intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY,
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j6x0pwr_intr, sc);
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callout_init(&sc->sc_poll_ch);
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callout_reset(&sc->sc_poll_ch, 5 * hz,
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j6x0pwr_poll_callout, sc);
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printf("\n");
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}
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/*
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* Triggered when the On/Off button is pressed or the lid is closed.
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* The state of the lid is reflected in the bit PGDR[2].
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* Closing the lid can trigger several consecutive interrupts.
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*
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* XXX: Since we don't put the machine to sleep, I have no idea how
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* wakeup interrupt(s) look like. Need to revisit when software
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* suspend is added to the kernel (which we need to support ACPI).
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*/
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static int
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j6x0pwr_intr(void *self)
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{
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struct j6x0pwr_softc *sc = (struct j6x0pwr_softc *)self;
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uint8_t irr0;
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uint8_t pgdr;
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irr0 = _reg_read_1(SH7709_IRR0);
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if ((irr0 & IRR0_IRQ0) == 0) {
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#ifdef DIAGNOSTIC
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printf_nolog("%s: irr0=0x%02x?\n", sc->sc_dev.dv_xname, irr0);
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#endif
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return (0);
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}
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/* clear the interrupt */
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_reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ0);
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pgdr = _reg_read_1(SH7709_PGDR);
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if ((pgdr & PGDR_LID_OPEN) == 0)
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printf("%s: lid closed\n", sc->sc_dev.dv_xname);
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else
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printf("%s: ON/OFF\n", sc->sc_dev.dv_xname);
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return (1);
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}
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volatile int j6x0pwr_poll_verbose = 0; /* XXX: tweak from ddb */
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static void
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j6x0pwr_poll_callout(void *self)
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{
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struct j6x0pwr_softc *sc = (struct j6x0pwr_softc *)self;
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int battery, backup, charging;
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uint8_t pgdr;
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int s;
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pgdr = _reg_read_1(SH7709_PGDR);
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/* just check main battery charge it not verbose and battery is in */
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if (!j6x0pwr_poll_verbose) {
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if (pgdr & PGDR_MAIN_BATTERY_OUT)
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goto reschedule;
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else {
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s = spltty();
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battery = adc_sample_channel(ADC_CHANNEL_BATTERY);
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splx(s);
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goto check_battery;
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}
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}
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s = spltty();
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battery = adc_sample_channel(ADC_CHANNEL_BATTERY);
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splx(s);
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s = spltty();
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backup = adc_sample_channel(ADC_CHANNEL_BACKUP);
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splx(s);
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s = spltty();
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charging = adc_sample_channel(ADC_CHANNEL_CHARGE);
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splx(s);
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printf_nolog("%s: main=", sc->sc_dev.dv_xname);
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if (pgdr & PGDR_MAIN_BATTERY_OUT)
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printf_nolog("<no>");
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else
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printf_nolog("%-4d", battery);
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printf_nolog(" bkup=%-4d", backup);
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/*
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* When main battery is being charged, ADC_CHANNEL_CHARGE
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* samples at almost zero. It samples at 2^10 otherwise.
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*/
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if (charging < 8)
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printf_nolog("charging");
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printf_nolog("\n");
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check_battery:
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if (!(pgdr & PGDR_MAIN_BATTERY_OUT)
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&& (battery < J6X0PWR_BATTERY_WARNING_THRESHOLD))
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printf("%s: WARNING: main battery %d is low!\n",
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sc->sc_dev.dv_xname, battery);
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reschedule:
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callout_schedule(&sc->sc_poll_ch, 5*hz);
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}
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