NetBSD/sys/dev/pci/viapm.c

/* $NetBSD: viapm.c,v 1.1 2000/05/08 16:40:43 joda Exp $ */

/*
 * Copyright (c) 2000 Johan Danielsson
 * 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. Neither the name of author nor the names of any contributors may
 *    be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 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 FOUNDATION 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.
 */

/* frontend for the power management device in the VIA VT82C686a South
   Bridge. It (the chip) has three functions, power management,
   hardware monitoring, and an SMBus controller. A driver for the
   hardware monitoring is provided by the viaenv driver */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>

#include <dev/pci/viapmvar.h>

struct viapm_softc {
    struct device	sc_dev;

    pci_chipset_tag_t	sc_pc;
    pcitag_t		sc_tag;
    bus_space_tag_t	sc_iot;
};

static int
viapm_match(struct device *parent, struct cfdata *match, void *aux)
{
    struct pci_attach_args *pa = aux;
    
    if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_VIATECH &&
	PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_VIATECH_VT82C686A_SMB)
	return 1;
    return 0;
}

static const char *
viapm_device_name(enum vapm_devtype type)
{
    switch(type) {
    case VIAPM_POWER:
	return "power management";
    case VIAPM_HWMON:
	return "hardware monitor";
    case VIAPM_SMBUS:
	return "SMBus controller";
    default:
	panic("viapm_device_name: unknown type");
    }
}

static int
viapm_print(void *aux, const char *pnp)
{
    struct viapm_attach_args *vaa = aux;
    if(pnp)
	printf("%s at %s", viapm_device_name(vaa->va_type), pnp);
    return UNCONF;
}

static int
viapm_submatch(struct device *parent, struct cfdata *cf, void *aux)
{
    return (*cf->cf_attach->ca_match)(parent, cf, aux);
}

static void
viapm_config_defer(struct device *self)
{
    struct viapm_softc *sc = (struct viapm_softc*)self;
    struct viapm_attach_args vaa;
  
    vaa.va_pc = sc->sc_pc;
    vaa.va_tag = sc->sc_tag;
    vaa.va_iot = sc->sc_iot;

#if 0
    /* no point in confusing people with these until there are drivers
       for them */
    vaa.va_type = VIAPM_POWER;
    vaa.va_offset = 0x40;
    config_found_sm(self, &vaa, viapm_print, viapm_submatch);
#endif

    vaa.va_type = VIAPM_HWMON;
    vaa.va_offset = 0x70;
    config_found_sm(self, &vaa, viapm_print, viapm_submatch);

#if 0
    vaa.va_type = VIAPM_SMBUS;
    vaa.va_offset = 0x93;
    config_found_sm(self, &vaa, viapm_print, viapm_submatch);
#endif
}

static void
viapm_attach(struct device *parent, struct device *self, void *aux)
{
    struct viapm_softc *sc = (struct viapm_softc*)self;
    struct pci_attach_args *pa = aux;

    printf("\n");

    sc->sc_pc = pa->pa_pc;
    sc->sc_tag = pa->pa_tag;
    sc->sc_iot = pa->pa_iot;

    config_defer(self, viapm_config_defer);
}

struct cfattach viapm_ca = {
    sizeof(struct viapm_softc), viapm_match, viapm_attach
};