x86/isa/atrtc_isa.c		standard	

x86/isa/atrtc_acpi.c		standard

#include <machine/intr_machdep.h>

#include "clock_if.h"

#include "atrtcvar.h"

#include <sys/cdefs.h>

#include <sys/param.h>

#include <sys/systm.h>

#include <sys/bus.h>

#include <sys/clock.h>

#include <sys/lock.h>

#include <sys/mutex.h>

#include <sys/kernel.h>

#include <sys/module.h>

#include <contrib/dev/acpica/include/acpi.h>

#include <contrib/dev/acpica/include/accommon.h>

#include <dev/acpica/acpivar.h>

#include <isa/rtc.h>

#include "atrtc_acpi.h"

#include "opt_acpi.h"

struct atrtc_acpi_stuff {

	ACPI_HANDLE acpi_handle;	/* Handle of the PNP0B00 node */

	int acpi_handle_registered;	/* 0 = acpi_handle not registered */

};

static void

acpi_cmos_read(ACPI_PHYSICAL_ADDRESS address, UINT8 *buf, UINT32 buflen)

{

	UINT32 offset;

	for (offset = 0; offset < buflen; ++offset) {

		buf[offset] = rtcin(address + offset) & 0xff;

	}

}

static void

acpi_cmos_write(ACPI_PHYSICAL_ADDRESS address, const UINT8 *buf, UINT32 buflen)

{

	UINT32 offset;

	for (offset = 0; offset < buflen; ++offset) {

		writertc(address + offset, buf[offset]);

	}

}

static int

acpi_check_rtc_access(int is_read, u_long addr, u_long len)

{

	int retval = 1;	/* Success */

	if (is_read) {

		/* Reading 0x0C will muck with interrupts */

		if (addr + len - 1 >= 0x0C && addr <= 0x0c)

			retval = 0;

	} else {

		/* Allow single-byte writes to alarm registers and

		 * addr >= 0x30, else deny.

		 */

		if (!((len == 1 && (addr <= 5 && (addr & 1))) || addr >= 0x30))

			retval = 0;

	}

	return retval;

}

static ACPI_STATUS

acpi_rtc_cmos_handler(UINT32 func, ACPI_PHYSICAL_ADDRESS addr,

    UINT32 bitwidth, UINT64 *value, void *context, void *region_context)

{

	device_t dev;

	struct atrtc_softc *sc;

	UINT32 bytewidth = bitwidth >> 3;

	dev = (device_t)context;

	sc = device_get_softc(dev);

	if (!value || !sc) {

		printf("NULL parameter.\n");

		return AE_BAD_PARAMETER;

	}

	if (bitwidth == 0 || bitwidth > 32 || (bitwidth & 0x07) ||

			addr + bytewidth - 1 > 63) {

		printf("Invalid bitwidth (%u) or addr (0x%08lx).\n", bitwidth,

				addr);

		return AE_BAD_PARAMETER;

	}

	if (!acpi_check_rtc_access(func == ACPI_READ, addr, bytewidth)) {

		printf("Bad CMOS %s access at addr 0x%08lx.\n",

			func == ACPI_READ ? "read" : "write", addr);

		return AE_BAD_PARAMETER;

	}

	switch (func) {

		case ACPI_READ:

			acpi_cmos_read(addr, (UINT8 *)value, bytewidth);

			break;

		case ACPI_WRITE:

			acpi_cmos_write(addr, (const UINT8 *)value, bytewidth);

			break;

		default:

			printf("Invalid function: %d.\n", func);

			return AE_BAD_PARAMETER;

	}

	if (bootverbose)

		printf("%-5s%02u addr=%04lx val=%08x\n",

			func == ACPI_READ ? "READ" : "WRITE", bytewidth,

			addr, *((UINT32 *)value));

	return AE_OK;

}

static devclass_t atrtc_acpi_devclass;

static ACPI_HANDLE acpi_handle = NULL;

DRIVER_MODULE(atrtc, acpi, atrtc_driver, atrtc_acpi_devclass, 0, 0);

int atrtc_acpi_register(device_t dev)

{

	ACPI_HANDLE acpi_handle = acpi_get_handle(dev);

	int retval;

	if ((retval = ACPI_FAILURE(AcpiInstallAddressSpaceHandler(acpi_handle,

					ACPI_ADR_SPACE_CMOS,

					acpi_rtc_cmos_handler, NULL, dev))))

	{

		device_printf(dev, "Warning: Couldn't register ACPI CMOS address space handler.\n");

	}

	return retval ? -1 : 0;

}

int atrtc_acpi_unregister(device_t dev)

{

	if (acpi_handle)

		AcpiRemoveAddressSpaceHandler(acpi_handle,

				ACPI_ADR_SPACE_CMOS, acpi_rtc_cmos_handler);

	return 0;

}

/*-

 * Copyright (c) 1990 The Regents of the University of California.

 * 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.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.

 *

 * $FreeBSD$

 */

#ifndef _X86_ISA_ATRTC_ACPI_H_

#define	_X86_ISA_ATRTC_ACPI_H_

#include <sys/cdefs.h>

__FBSDID("$FreeBSD$");

#include <sys/types.h>

#include <sys/param.h>

#include <sys/systm.h>

#include <sys/bus.h>

int	atrtc_acpi_register(device_t dev);

int	atrtc_acpi_unregister(device_t dev);

driver_t atrtc_driver;

#endif /* !_X86_ISA_ATRTC_ACPI_H_ */

/*-

 * Copyright (c) 2008 Poul-Henning Kamp

 * Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org>

 * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.

 *

 * $FreeBSD$

 */

#include <sys/cdefs.h>

__FBSDID("$FreeBSD$");

#include <sys/types.h>

#include <sys/param.h>

#include <sys/systm.h>

#include <sys/bus.h>

#include <sys/clock.h>

#include <sys/lock.h>

#include <sys/mutex.h>

#include <sys/kdb.h>

#include <sys/kernel.h>

#include <sys/module.h>

#include <sys/proc.h>

#include <sys/timeet.h>

#include <sys/rman.h>

#include <isa/isavar.h>

#include <isa/isareg.h>

#include <isa/rtc.h>

#include <machine/intr_machdep.h>

#include <machine/resource.h>

#include "clock_if.h"

#include "atrtcvar.h"

#include "atrtc_acpi.h"

int atrtcclock_disable = 0;

static int atrtc_isa_probe(device_t dev);

/*

 * Attach to the ISA PnP descriptors for the timer and realtime clock.

 */

static struct isa_pnp_id atrtc_ids[] = {

	{ 0x000bd041 /* PNP0B00 */, "AT realtime clock" },

	{ 0 }

};

static int

atrtc_isa_probe(device_t dev)

{

	int result;

	result = ISA_PNP_PROBE(device_get_parent(dev), dev, atrtc_ids);

	/* ENOENT means no PnP-ID, device is hinted. */

	if (result == ENOENT) {

		device_set_desc(dev, "AT realtime clock");

		return (BUS_PROBE_LOW_PRIORITY);

	}

	return (result);

}

static int

atrtc_isa_attach(device_t dev)

{

	struct atrtc_softc *sc;

	u_long s;

	int i;

	sc = device_get_softc(dev);

	sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->port_rid,

	    IO_RTC, IO_RTC + 1, 2, RF_ACTIVE);

	if (sc->port_res == NULL)

		device_printf(dev, "Warning: Couldn't map I/O.\n");

	atrtc_start();

	clock_register(dev, 1000000);

	bzero(&sc->et, sizeof(struct eventtimer));

	if (!atrtcclock_disable &&

	    (resource_int_value(device_get_name(dev), device_get_unit(dev),

	     "clock", &i) != 0 || i != 0)) {

		sc->intr_rid = 0;

		while (bus_get_resource(dev, SYS_RES_IRQ, sc->intr_rid,

		    &s, NULL) == 0 && s != 8)

			sc->intr_rid++;

		sc->intr_res = bus_alloc_resource(dev, SYS_RES_IRQ,

		    &sc->intr_rid, 8, 8, 1, RF_ACTIVE);

		if (sc->intr_res == NULL) {

			device_printf(dev, "Can't map interrupt.\n");

			return (0);

		} else if ((bus_setup_intr(dev, sc->intr_res, INTR_TYPE_CLK,

		    rtc_intr, NULL, sc, &sc->intr_handler))) {

			device_printf(dev, "Can't setup interrupt.\n");

			return (0);

		} else { 

			/* Bind IRQ to BSP to avoid live migration. */

			bus_bind_intr(dev, sc->intr_res, 0);

		}

		(void)atrtc_acpi_register(dev);

		sc->et.et_name = "RTC";

		sc->et.et_flags = ET_FLAGS_PERIODIC | ET_FLAGS_POW2DIV;

		sc->et.et_quality = 0;

		sc->et.et_frequency = 32768;

		sc->et.et_min_period = 0x00080000;

		sc->et.et_max_period = 0x80000000;

		sc->et.et_start = rtc_start;

		sc->et.et_stop = rtc_stop;

		sc->et.et_priv = dev;

		et_register(&sc->et);

	}

	return(0);

}

static int atrtc_isa_detach(device_t dev)

{

	struct atrtc_softc *sc;

	sc = device_get_softc(dev);

	(void)atrtc_acpi_unregister(dev);

	return bus_generic_detach(dev);

}

static int

atrtc_resume(device_t dev)

{

	atrtc_restore();

	return(0);

}

static device_method_t atrtc_methods[] = {

	/* Device interface */

	DEVMETHOD(device_probe,		atrtc_isa_probe),

	DEVMETHOD(device_attach,	atrtc_isa_attach),

	DEVMETHOD(device_detach,	atrtc_isa_detach),

	DEVMETHOD(device_shutdown,	bus_generic_shutdown),

	DEVMETHOD(device_suspend,	bus_generic_suspend),

		/* XXX stop statclock? */

	DEVMETHOD(device_resume,	atrtc_resume),

	/* clock interface */

	DEVMETHOD(clock_gettime,	atrtc_gettime),

	DEVMETHOD(clock_settime,	atrtc_settime),

	{ 0, 0 }

};

driver_t atrtc_driver = {

	"atrtc",

	atrtc_methods,

	sizeof(struct atrtc_softc),

};

static devclass_t atrtc_isa_devclass;

DRIVER_MODULE(atrtc, isa, atrtc_driver, atrtc_isa_devclass, 0, 0);

#ifndef ATRTCVAR_H

#define ATRTCVAR_H

#include <sys/types.h>

#include <sys/timeet.h>

struct atrtc_softc {

	int port_rid, intr_rid;

	struct resource *port_res;

	struct resource *intr_res;

	void *intr_handler;

	struct eventtimer et;

};

int atrtc_gettime(device_t dev, struct timespec *ts);

int atrtc_settime(device_t dev __unused, struct timespec *ts);

void atrtc_start(void);

void atrtc_restore(void);

int rtc_start(struct eventtimer *et, sbintime_t first, sbintime_t period);

int rtc_stop(struct eventtimer *et);

int rtc_intr(void *arg);

#endif	/* ATRTCVAR_H */