349 lines
8.7 KiB
C
349 lines
8.7 KiB
C
/* $NetBSD: j6x0pwr.c,v 1.13 2006/10/27 00:08:32 uwe Exp $ */
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/*
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* Copyright (c) 2003, 2006 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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: j6x0pwr.c,v 1.13 2006/10/27 00:08:32 uwe Exp $");
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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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#include <dev/apm/apmbios.h>
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#include <machine/platid.h>
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#include <machine/platid_mask.h>
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#include <machine/config_hook.h>
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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 <sh3/dev/adcvar.h>
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/* SH7709 PFC 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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#define PJDR_AC_POWER_OUT 0x10
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#define PLDR_BATTERY_CHARGED 0x20
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static inline int __attribute__((__always_inline__))
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j6x0pwr_battery_is_absent(void)
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{
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return _reg_read_1(SH7709_PGDR) & PGDR_MAIN_BATTERY_OUT;
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}
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static inline int __attribute__((__always_inline__))
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j6x0pwr_ac_is_off(void)
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{
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return _reg_read_1(SH7709_PJDR) & PJDR_AC_POWER_OUT;
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}
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static inline int __attribute__((__always_inline__))
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j6x0pwr_is_not_charging(void)
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{
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return _reg_read_1(SH7709_PLDR) & PLDR_BATTERY_CHARGED;
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}
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/* A/D converter channels to get power stats from */
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#define ADC_CHANNEL_BATTERY 3 /* main battery */
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#define ADC_CHANNEL_BACKUP 4 /* backup battery - we don't report it */
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#define ADC_CHANNEL_CHARGE 5 /* we use PLDR_BATTERY_CHARGED instead */
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/*
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* Empirical range of battery values.
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* Thanks to Joseph Heenan for measurements.
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*/
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#define J6X0PWR_BATTERY_MIN 630
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#define J6X0PWR_BATTERY_CRITICAL 635
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#define J6X0PWR_BATTERY_LOW 645
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#define J6X0PWR_BATTERY_FULL 910 /* can be slightly more */
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/* Convenience aliases (XXX: should be provided by config_hook.h) */
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#define CONFIG_HOOK_BUTTON_PRESSED ((void *)1)
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#define CONFIG_HOOK_BUTTON_RELEASED ((void *)0)
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/* allow only one instance */
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static int j6x0pwr_attached = 0;
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struct j6x0pwr_softc {
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struct device sc_dev;
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void *sc_ih;
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volatile int sc_poweroff;
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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_apm_getpower_hook(void *, int, long, void *);
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static int j6x0pwr_get_battery(void); /* from ADC */
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static int j6x0pwr_intr(void *);
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static void j6x0pwr_sleep(void *);
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static int j6x0pwr_clear_interrupt(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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/* allow only one instance */
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return !j6x0pwr_attached;
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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 = (void *)self;
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/* XXX: in machdep.c */
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extern void (*__sleep_func)(void *);
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extern void *__sleep_ctx;
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/* allow only one instance */
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j6x0pwr_attached = 1;
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/* arrange for hpcapm to call us when power status is requested */
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config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_ACADAPTER,
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CONFIG_HOOK_EXCLUSIVE,
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j6x0pwr_apm_getpower_hook, sc);
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config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CHARGE,
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CONFIG_HOOK_EXCLUSIVE,
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j6x0pwr_apm_getpower_hook, sc);
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config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BATTERYVAL,
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CONFIG_HOOK_EXCLUSIVE,
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j6x0pwr_apm_getpower_hook, sc);
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/* register sleep function to APM */
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__sleep_func = j6x0pwr_sleep;
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__sleep_ctx = self;
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sc->sc_poweroff = 0;
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/* drain the old interrupt */
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j6x0pwr_clear_interrupt();
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sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY,
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j6x0pwr_intr, sc);
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_reg_write_1(SH7709_PKDR, 0); /* Green LED on */
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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[0].
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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 = j6x0pwr_clear_interrupt();
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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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pgdr = _reg_read_1(SH7709_PGDR);
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if ((pgdr & PGDR_LID_OPEN) == 0) {
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printf("%s: lid closed %d\n", sc->sc_dev.dv_xname,
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sc->sc_poweroff);
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if (sc->sc_poweroff)
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return 1;
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} else {
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printf("%s: ON/OFF %d\n", sc->sc_dev.dv_xname, sc->sc_poweroff);
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if (sc->sc_poweroff)
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sc->sc_poweroff = 0;
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}
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config_hook_call(CONFIG_HOOK_BUTTONEVENT,
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CONFIG_HOOK_BUTTONEVENT_POWER,
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CONFIG_HOOK_BUTTON_PRESSED);
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/* fake release */
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config_hook_call(CONFIG_HOOK_BUTTONEVENT,
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CONFIG_HOOK_BUTTONEVENT_POWER,
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CONFIG_HOOK_BUTTON_RELEASED);
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return 1;
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}
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static int
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j6x0pwr_clear_interrupt(void)
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{
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uint8_t irr0;
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irr0 = _reg_read_1(SH7709_IRR0);
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if (irr0 & IRR0_IRQ0)
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_reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ0);
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return irr0;
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}
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void
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j6x0pwr_sleep(void *self)
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{
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/* splhigh on entry */
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struct j6x0pwr_softc *sc = self;
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int s;
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/* Reinstall j6x0pwr_intr as a wakeup handler */
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intc_intr_disestablish(sc->sc_ih);
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sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_HIGH,
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j6x0pwr_intr, sc);
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sc->sc_poweroff = 1;
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do {
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/* Disable interrupt except for power button. */
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s = _cpu_intr_resume(IPL_CLOCK << 4);
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_reg_write_1(SH7709_PKDR, 0xff); /* Green LED off */
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__asm volatile("sleep");
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_reg_write_1(SH7709_PKDR, 0); /* Green LED on */
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_cpu_intr_resume(s);
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} while (sc->sc_poweroff);
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/* Return to normal power button */
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intc_intr_disestablish(sc->sc_ih);
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sc->sc_ih = intc_intr_establish(SH7709_INTEVT2_IRQ0, IST_EDGE, IPL_TTY,
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j6x0pwr_intr, sc);
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/* splhigh on exit */
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}
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static int
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j6x0pwr_apm_getpower_hook(void *ctx, int type, long id, void *msg)
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{
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/* struct j6x0pwr_softc * const sc = ctx; */
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int * const pval = msg;
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int battery, state;
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if (type != CONFIG_HOOK_GET)
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return EINVAL;
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switch (id) {
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case CONFIG_HOOK_ACADAPTER:
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*pval = j6x0pwr_ac_is_off() ? APM_AC_OFF : APM_AC_ON;
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return 0;
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case CONFIG_HOOK_CHARGE:
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if (j6x0pwr_battery_is_absent())
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state = APM_BATT_FLAG_NO_SYSTEM_BATTERY;
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else {
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battery = j6x0pwr_get_battery();
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if (battery < J6X0PWR_BATTERY_CRITICAL)
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state = APM_BATT_FLAG_CRITICAL;
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else if (battery < J6X0PWR_BATTERY_LOW)
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state = APM_BATT_FLAG_LOW;
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else
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state = APM_BATT_FLAG_HIGH; /* XXX? */
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if (!j6x0pwr_is_not_charging())
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state |= APM_BATT_FLAG_CHARGING;
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}
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*pval = state;
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return 0;
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case CONFIG_HOOK_BATTERYVAL:
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if (j6x0pwr_battery_is_absent())
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state = 0;
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else {
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battery = j6x0pwr_get_battery();
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if (battery > J6X0PWR_BATTERY_FULL)
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state = 100;
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else
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state = 100 * (battery - J6X0PWR_BATTERY_MIN)
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/ (J6X0PWR_BATTERY_FULL
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- J6X0PWR_BATTERY_MIN);
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}
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*pval = state;
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return 0;
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}
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return EINVAL;
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}
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static int
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j6x0pwr_get_battery(void)
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{
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int battery;
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int s;
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if (j6x0pwr_battery_is_absent())
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return -1;
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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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return battery;
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}
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