/*      $NetBSD: pckbc_acpi.c,v 1.40 2024/11/10 13:29:38 martin Exp $   */

/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*/

/*
* ACPI attachment for the PC Keyboard Controller driver.
*
* This is a little wonky.  The keyboard controller actually
* has 2 ACPI nodes: one for the controller and the keyboard
* interrupt, and one for the aux port (mouse) interrupt.
*
* For this reason, we actually attach *two* instances of this
* driver.  After both of them have been found, then we attach
* sub-devices.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pckbc_acpi.c,v 1.40 2024/11/10 13:29:38 martin Exp $");

#include <sys/param.h>
#include <sys/callout.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>

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

#include <dev/isa/isareg.h>

#include <dev/ic/i8042reg.h>
#include <dev/ic/pckbcvar.h>

#include "ioconf.h"

static int      pckbc_acpi_match(device_t, cfdata_t, void *);
static void     pckbc_acpi_attach(device_t, device_t, void *);

struct pckbc_acpi_softc {
       struct pckbc_softc sc_pckbc;

       ACPI_HANDLE sc_handle;
       pckbc_slot_t sc_slot;
};

/* Save first port: */
static struct pckbc_acpi_softc *first;

CFATTACH_DECL_NEW(pckbc_acpi, sizeof(struct pckbc_acpi_softc),
   pckbc_acpi_match, pckbc_acpi_attach, NULL, NULL);

static void     pckbc_acpi_intr_establish(struct pckbc_softc *, pckbc_slot_t);
static void     pckbc_acpi_finish_attach(device_t);

/*
* Supported Device IDs
*/

static const struct device_compatible_entry compat_data[] = {
       /* Standard PC KBD port */
       { .compat = "PNP03??",          .value = PCKBC_KBD_SLOT },

       /* (Nobody else here but us mouses...) */
       { .compat = "PNP0F03",          .value = PCKBC_AUX_SLOT },
       { .compat = "PNP0F0E",          .value = PCKBC_AUX_SLOT },
       { .compat = "PNP0F12",          .value = PCKBC_AUX_SLOT },
       { .compat = "PNP0F13",          .value = PCKBC_AUX_SLOT },
       { .compat = "PNP0F19",          .value = PCKBC_AUX_SLOT },
       { .compat = "PNP0F1B",          .value = PCKBC_AUX_SLOT },
       { .compat = "PNP0F1C",          .value = PCKBC_AUX_SLOT },
       { .compat = "SYN0302",          .value = PCKBC_AUX_SLOT },
       { .compat = "ELAN0501",         .value = PCKBC_AUX_SLOT },

       DEVICE_COMPAT_EOL
};

/*
* pckbc_acpi_match: autoconf(9) match routine
*/
static int
pckbc_acpi_match(device_t parent, cfdata_t match, void *aux)
{
       struct acpi_attach_args *aa = aux;

       return acpi_compatible_match(aa, compat_data);
}

static void
pckbc_acpi_attach(device_t parent, device_t self, void *aux)
{
       struct pckbc_acpi_softc *psc = device_private(self);
       struct pckbc_softc *sc = &psc->sc_pckbc;
       struct pckbc_internal *t;
       struct acpi_attach_args *aa = aux;
       const struct device_compatible_entry *dce;
       bus_space_handle_t ioh_d, ioh_c;
       struct acpi_resources res;
       struct acpi_io *io0, *io1, *ioswap;
       struct acpi_irq *irq;
       ACPI_STATUS rv;

       sc->sc_dv = self;

       dce = acpi_compatible_lookup(aa, compat_data);
       KASSERT(dce != NULL);

       psc->sc_slot = dce->value;

       aprint_normal(" (%s port)", pckbc_slot_names[psc->sc_slot]);

       /* parse resources */
       rv = acpi_resource_parse(sc->sc_dv, aa->aa_node->ad_handle, "_CRS",
           &res, &acpi_resource_parse_ops_default);
       if (ACPI_FAILURE(rv))
               return;

       /* find our IRQ */
       irq = acpi_res_irq(&res, 0);
       if (irq == NULL) {
               aprint_error_dev(self, "unable to find irq resource\n");
               goto out;
       }
       psc->sc_handle = aa->aa_node->ad_handle;

       if (psc->sc_slot == PCKBC_KBD_SLOT)
               first = psc;

       if ((!first || !first->sc_pckbc.id) &&
           (psc->sc_slot == PCKBC_KBD_SLOT)) {

               io0 = acpi_res_io(&res, 0);
               io1 = acpi_res_io(&res, 1);
               if (io0 == NULL || io1 == NULL) {
                       aprint_error_dev(self,
                           "unable to find i/o resources\n");
                       goto out;
               }

               /*
                * JDM: Some firmware doesn't report resources in the order we
                * expect; sort IO resources here (lowest first)
                */
               if (io0->ar_base > io1->ar_base) {
                       ioswap = io0;
                       io0 = io1;
                       io1 = ioswap;
               }

               if (pckbc_is_console(aa->aa_iot, io0->ar_base)) {
                       t = &pckbc_consdata;
                       ioh_d = t->t_ioh_d;
                       ioh_c = t->t_ioh_c;
                       pckbc_console_attached = 1;
                       /* t->t_cmdbyte was initialized by cnattach */
               } else {
                       if (bus_space_map(aa->aa_iot, io0->ar_base,
                                         io0->ar_length, 0, &ioh_d) ||
                           bus_space_map(aa->aa_iot, io1->ar_base,
                                         io1->ar_length, 0, &ioh_c)) {
                               aprint_error_dev(self,
                                   "unable to map registers\n");
                               goto out;
                       }

                       t = malloc(sizeof(struct pckbc_internal),
                           M_DEVBUF, M_WAITOK|M_ZERO);
                       t->t_iot = aa->aa_iot;
                       t->t_ioh_d = ioh_d;
                       t->t_ioh_c = ioh_c;
                       t->t_addr = io0->ar_base;
                       t->t_cmdbyte = KC8_CPU; /* Enable ports */
                       callout_init(&t->t_cleanup, 0);
               }

               t->t_sc = &first->sc_pckbc;
               first->sc_pckbc.id = t;

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

               first->sc_pckbc.intr_establish = pckbc_acpi_intr_establish;
               config_defer(first->sc_pckbc.sc_dv, pckbc_acpi_finish_attach);
       }

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

static void
pckbc_acpi_intr_establish(struct pckbc_softc *sc, pckbc_slot_t slot)
{
       struct pckbc_acpi_softc *psc = NULL; /* XXX: gcc */
       void *rv = NULL;
       ACPI_HANDLE handle;
       char intr_name[64];
       int i;

       /*
        * Note we're always called with sc == first.
        */
       for (i = 0; i < pckbc_cd.cd_ndevs; i++) {
               psc = device_lookup_private(&pckbc_cd, i);
               if (psc && psc->sc_slot == slot) {
                       handle = psc->sc_handle;
                       break;
               }
       }
       if (i < pckbc_cd.cd_ndevs) {
               snprintf(intr_name, sizeof(intr_name), "%s %s",
                   device_xname(psc->sc_pckbc.sc_dv), pckbc_slot_names[slot]);

               rv = acpi_intr_establish(sc->sc_dv, (uint64_t)(uintptr_t)handle,
                   IPL_TTY, false, pckbcintr, sc, intr_name);
       }
       if (rv == NULL) {
               aprint_error_dev(sc->sc_dv,
                   "unable to establish interrupt for %s slot\n",
                   pckbc_slot_names[slot]);
       } else {
               aprint_normal_dev(sc->sc_dv, "using %s for %s slot\n",
                   acpi_intr_string(rv, intr_name, sizeof(intr_name)),
                   pckbc_slot_names[slot]);
       }
}

static void
pckbc_acpi_finish_attach(device_t dv)
{

       pckbc_attach(device_private(dv));
}

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