/* $NetBSD: ipmi_acpi.c,v 1.6 2021/08/07 16:19:09 thorpej Exp $ */

/* $NetBSD: ipmi_acpi.c,v 1.6 2021/08/07 16:19:09 thorpej Exp $ */

/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Michael van Elst
*
* 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 NETBSD FOUNDATION, INC. 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ipmi_acpi.c,v 1.6 2021/08/07 16:19:09 thorpej Exp $");

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

#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>

#include <dev/ipmivar.h>

#define _COMPONENT ACPI_RESOURCE_COMPONENT
ACPI_MODULE_NAME ("ipmi_acpi")

typedef struct ipmi_acpi_softc {
device_t sc_dev;
bool sc_init;
} ipmi_acpi_softc_t;

static int ipmi_acpi_match(device_t, cfdata_t, void *);
static void ipmi_acpi_attach(device_t, device_t, void *);
static int ipmi_acpi_detach(device_t, int);

CFATTACH_DECL3_NEW(ipmi_acpi, sizeof(ipmi_acpi_softc_t),
ipmi_acpi_match, ipmi_acpi_attach, ipmi_acpi_detach, NULL, NULL, NULL,
DVF_DETACH_SHUTDOWN);

static const struct device_compatible_entry compat_data[] = {
{ .compat = "IPI0001" },
DEVICE_COMPAT_EOL
};

static int
ipmi_acpi_match(device_t parent, cfdata_t match, void *opaque)
{
struct acpi_attach_args *aa = (struct acpi_attach_args *)opaque;

return acpi_compatible_match(aa, compat_data);
}

static void
ipmi_acpi_attach(device_t parent, device_t self, void *opaque)
{
ipmi_acpi_softc_t *sc = device_private(self);
struct acpi_attach_args *aa = (struct acpi_attach_args *)opaque;
ACPI_STATUS rv;
ACPI_INTEGER itype, ivers, adr;
struct acpi_resources res;
struct acpi_io *io;
struct acpi_mem *mem;
#if notyet
struct acpi_irq *irq;
#endif
struct ipmi_attach_args IA, *ia = &IA;
bus_addr_t reg2;
uint16_t i2caddr;

sc->sc_dev = self;

aprint_naive("\n");

rv = acpi_eval_integer(aa->aa_node->ad_handle, "_IFT", &itype);
if (ACPI_FAILURE(rv)) {
aprint_error("no _IFT\n");
return;
}

rv = acpi_eval_integer(aa->aa_node->ad_handle, "_SRV", &ivers);
if (ACPI_FAILURE(rv)) {
aprint_error("no _SRV\n");
return;
}

switch (itype) {
case IPMI_IF_KCS:
case IPMI_IF_SMIC:
case IPMI_IF_BT:
rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
&res, &acpi_resource_parse_ops_default);
if (ACPI_FAILURE(rv)) {
aprint_normal("\n");
aprint_error_dev(self, "no resources\n");
return;
}

io = acpi_res_io(&res, 0);
mem = acpi_res_mem(&res, 0);
if (io == NULL && mem == NULL) {
aprint_error_dev(self, "no resources\n");
return;
}

#if notyet
if ((irq = acpi_res_irq(&res, 0)) != NULL) {
aprint_normal_dev(self, "IRQ %d type %d\n",
irq->ar_irq, irq->ar_type);
} else {
aprint_error_dev(self, "no interrupt\n");
}
#endif
ia->iaa_iot = aa->aa_iot;
ia->iaa_memt = aa->aa_memt;

ia->iaa_if_type = itype;
ia->iaa_if_rev = ivers;
ia->iaa_if_iotype = io ? 'i' : 'm';
ia->iaa_if_iobase = io ? io->ar_base : mem->ar_base;
ia->iaa_if_iospacing = 1;
ia->iaa_if_irq = -1;
ia->iaa_if_irqlvl = 0;

reg2 = 0;
if (io) {
io = acpi_res_io(&res, 1);
if (io != NULL)
reg2 = (bus_addr_t)io->ar_base;
} else {
mem = acpi_res_mem(&res, 1);
if (mem != NULL)
reg2 = mem->ar_base;
}

if (reg2 > ia->iaa_if_iobase)
ia->iaa_if_iospacing = reg2 - ia->iaa_if_iobase;

config_found(self, ia, NULL, CFARGS_NONE);

break;
case IPMI_IF_SSIF:
rv = acpi_eval_integer(aa->aa_node->ad_handle, "_ADR", &adr);
if (ACPI_FAILURE(rv)) {
aprint_normal("\n");
aprint_error_dev(self, "no resources\n");
return;
}
if (adr > 65535) {
aprint_normal("\n");
aprint_error_dev(self, "i2c address out of range\n");
return;
}
i2caddr = adr;

aprint_normal(": i2c 0x%x\n", i2caddr);
break;
default:
aprint_normal("\n");
aprint_error_dev(self, "unknown interface type\n");
return;
}

sc->sc_init = true;

if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish power handler\n");
}

static int
ipmi_acpi_detach(device_t self, int flags)
{
struct ipmi_acpi_softc *sc = device_private(self);
int rc;

if (!sc->sc_init)
return 0;

rc = config_detach_children(self, flags);
if (rc)
return rc;

pmf_device_deregister(self);
return 0;
}