/*      $NetBSD: sony_acpi.c,v 1.24 2021/01/29 15:49:55 thorpej Exp $   */

/*-
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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: sony_acpi.c,v 1.24 2021/01/29 15:49:55 thorpej Exp $");

#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/systm.h>

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

#define _COMPONENT          ACPI_RESOURCE_COMPONENT
ACPI_MODULE_NAME            ("sony_acpi")

#define SONY_NOTIFY_FnKeyEvent                  0x92
#define SONY_NOTIFY_BrightnessDownPressed       0x85
#define SONY_NOTIFY_BrightnessDownReleased      0x05
#define SONY_NOTIFY_BrightnessUpPressed         0x86
#define SONY_NOTIFY_BrightnessUpReleased        0x06
#define SONY_NOTIFY_DisplaySwitchPressed        0x87
#define SONY_NOTIFY_DisplaySwitchReleased       0x07
#define SONY_NOTIFY_ZoomPressed                 0x8a
#define SONY_NOTIFY_ZoomReleased                0x0a
#define SONY_NOTIFY_SuspendPressed              0x8c
#define SONY_NOTIFY_SuspendReleased             0x0c

struct sony_acpi_softc {
       device_t sc_dev;
       struct sysctllog *sc_log;
       struct acpi_devnode *sc_node;

#define SONY_PSW_SLEEP          0
#define SONY_PSW_DISPLAY_CYCLE  1
#define SONY_PSW_ZOOM           2
#define SONY_PSW_LAST           3
       struct sysmon_pswitch sc_smpsw[SONY_PSW_LAST];
       int sc_smpsw_valid;

#define SONY_ACPI_QUIRK_FNINIT  0x01
       int sc_quirks;
       bool sc_has_pic;

       struct sony_acpi_pmstate {
               ACPI_INTEGER    brt;
       } sc_pmstate;
};

static const struct device_compatible_entry compat_data[] = {
       { .compat = "SNY5001" },
       DEVICE_COMPAT_EOL
};

static int      sony_acpi_match(device_t, cfdata_t, void *);
static void     sony_acpi_attach(device_t, device_t, void *);
static ACPI_STATUS sony_acpi_eval_set_integer(ACPI_HANDLE, const char *,
   ACPI_INTEGER, ACPI_INTEGER *);
static void     sony_acpi_quirk_setup(struct sony_acpi_softc *);
static void     sony_acpi_notify_handler(ACPI_HANDLE, uint32_t, void *);
static bool     sony_acpi_suspend(device_t, const pmf_qual_t *);
static bool     sony_acpi_resume(device_t, const pmf_qual_t *);
static void     sony_acpi_brightness_down(device_t);
static void     sony_acpi_brightness_up(device_t);
static ACPI_STATUS sony_acpi_find_pic(ACPI_HANDLE, uint32_t, void *, void **);

CFATTACH_DECL_NEW(sony_acpi, sizeof(struct sony_acpi_softc),
   sony_acpi_match, sony_acpi_attach, NULL, NULL);

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

       return acpi_compatible_match(aa, compat_data);
}

static int
sony_sysctl_helper(SYSCTLFN_ARGS)
{
       struct sysctlnode node;
       ACPI_INTEGER acpi_val;
       ACPI_STATUS rv;
       int val, old_val, error;
       char buf[SYSCTL_NAMELEN + 1], *ptr;
       struct sony_acpi_softc *sc = rnode->sysctl_data;

       (void)snprintf(buf, sizeof(buf), "G%s", rnode->sysctl_name);
       for (ptr = buf; *ptr; ptr++)
               *ptr = toupper((unsigned char)*ptr);

       rv = acpi_eval_integer(sc->sc_node->ad_handle, buf, &acpi_val);
       if (ACPI_FAILURE(rv)) {
#ifdef DIAGNOSTIC
               printf("%s: couldn't get `%s'\n", device_xname(sc->sc_dev),
                   buf);
#endif
               return EIO;
       }
       val = old_val = acpi_val;

       node = *rnode;
       node.sysctl_data = &val;

       error = sysctl_lookup(SYSCTLFN_CALL(&node));
       if (error || newp == NULL)
               return error;

       buf[0] = 'S';
       acpi_val = val;
       rv = sony_acpi_eval_set_integer(sc->sc_node->ad_handle, buf,
           acpi_val, NULL);
       if (ACPI_FAILURE(rv)) {
#ifdef DIAGNOSTIC
               printf("%s: couldn't set `%s' to %d\n",
                   device_xname(sc->sc_dev), buf, val);
#endif
               return EIO;
       }
       return 0;
}

static ACPI_STATUS
sony_walk_cb(ACPI_HANDLE hnd, uint32_t v, void *context, void **status)
{
       struct sony_acpi_softc *sc = (void *)context;
       const struct sysctlnode *node, *snode;
       const char *name = acpi_name(hnd);
       ACPI_INTEGER acpi_val;
       char buf[SYSCTL_NAMELEN + 1], *ptr;
       int rv;

       if ((name = strrchr(name, '.')) == NULL)
               return AE_OK;

       name++;
       if ((*name != 'G') && (*name != 'S'))
               return AE_OK;

       (void)strlcpy(buf, name, sizeof(buf));
       *buf = 'G';

       /*
        * We assume that if the 'get' of the name as an integer is
        * successful it is ok.
        */
       if (acpi_eval_integer(sc->sc_node->ad_handle, buf, &acpi_val))
               return AE_OK;

       for (ptr = buf; *ptr; ptr++)
               *ptr = tolower(*ptr);

       if ((rv = sysctl_createv(&sc->sc_log, 0, NULL, &snode, 0,
           CTLTYPE_NODE, device_xname(sc->sc_dev),
           SYSCTL_DESCR("sony controls"),
           NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0)
               goto out;

       if ((rv = sysctl_createv(&sc->sc_log, 0, &snode, &node,
           CTLFLAG_READWRITE, CTLTYPE_INT, buf + 1, NULL,
           sony_sysctl_helper, 0, (void *)sc, 0, CTL_CREATE, CTL_EOL)) != 0)
               goto out;

out:
#ifdef DIAGNOSTIC
       if (rv)
               printf("%s: sysctl_createv failed (rv = %d)\n",
                   device_xname(sc->sc_dev), rv);
#endif
       return AE_OK;
}

ACPI_STATUS
sony_acpi_eval_set_integer(ACPI_HANDLE handle, const char *path,
   ACPI_INTEGER val, ACPI_INTEGER *valp)
{
       ACPI_STATUS rv;
       ACPI_BUFFER buf;
       ACPI_OBJECT param, ret_val;
       ACPI_OBJECT_LIST params;

       if (handle == NULL)
               handle = ACPI_ROOT_OBJECT;

       params.Count = 1;
       params.Pointer = &param;

       param.Type = ACPI_TYPE_INTEGER;
       param.Integer.Value = val;

       buf.Pointer = &ret_val;
       buf.Length = sizeof(ret_val);

       rv = AcpiEvaluateObjectTyped(handle, path, &params, &buf,
           ACPI_TYPE_INTEGER);

       if (ACPI_SUCCESS(rv) && valp)
               *valp = ret_val.Integer.Value;

       return rv;
}

static void
sony_acpi_attach(device_t parent, device_t self, void *aux)
{
       struct sony_acpi_softc *sc = device_private(self);
       struct acpi_attach_args *aa = aux;
       ACPI_STATUS rv;
       int i;

       aprint_naive(": Sony Miscellaneous Controller\n");
       aprint_normal(": Sony Miscellaneous Controller\n");

       sc->sc_node = aa->aa_node;
       sc->sc_dev = self;

       rv = AcpiWalkNamespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 100,
           sony_acpi_find_pic, NULL, sc, NULL);
       if (ACPI_FAILURE(rv))
               aprint_error_dev(self, "couldn't walk namespace: %s\n",
                   AcpiFormatException(rv));

       /*
        * If we don't find an SNY6001 device, assume that we need the
        * Fn key initialization sequence.
        */
       if (sc->sc_has_pic == false)
               sc->sc_quirks |= SONY_ACPI_QUIRK_FNINIT;

       sony_acpi_quirk_setup(sc);

       /* Configure suspend button and hotkeys */
       sc->sc_smpsw[SONY_PSW_SLEEP].smpsw_name = device_xname(self);
       sc->sc_smpsw[SONY_PSW_SLEEP].smpsw_type = PSWITCH_TYPE_SLEEP;
       sc->sc_smpsw[SONY_PSW_DISPLAY_CYCLE].smpsw_name =
           PSWITCH_HK_DISPLAY_CYCLE;
       sc->sc_smpsw[SONY_PSW_DISPLAY_CYCLE].smpsw_type = PSWITCH_TYPE_HOTKEY;
       sc->sc_smpsw[SONY_PSW_ZOOM].smpsw_name = PSWITCH_HK_ZOOM_BUTTON;
       sc->sc_smpsw[SONY_PSW_ZOOM].smpsw_type = PSWITCH_TYPE_HOTKEY;
       sc->sc_smpsw_valid = 1;

       for (i = 0; i < SONY_PSW_LAST; i++)
               if (sysmon_pswitch_register(&sc->sc_smpsw[i]) != 0) {
                       aprint_error_dev(self,
                           "couldn't register %s with sysmon\n",
                           sc->sc_smpsw[i].smpsw_name);
                       sc->sc_smpsw_valid = 0;
               }

       (void)acpi_register_notify(sc->sc_node, sony_acpi_notify_handler);

       /* Install sysctl handler */
       rv = AcpiWalkNamespace(ACPI_TYPE_METHOD,
           sc->sc_node->ad_handle, 1, sony_walk_cb, NULL, sc, NULL);

#ifdef DIAGNOSTIC
       if (ACPI_FAILURE(rv))
               aprint_error_dev(self, "Cannot walk ACPI namespace (%u)\n",
                   rv);
#endif

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

       if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_UP,
                                sony_acpi_brightness_up, true))
               aprint_error_dev(self,
                   "couldn't register BRIGHTNESS UP handler\n");

       if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_DOWN,
                                sony_acpi_brightness_down, true))
               aprint_error_dev(self,
                   "couldn't register BRIGHTNESS DOWN handler\n");
}

static void
sony_acpi_quirk_setup(struct sony_acpi_softc *sc)
{
       ACPI_HANDLE hdl = sc->sc_node->ad_handle;

       if (sc->sc_quirks & SONY_ACPI_QUIRK_FNINIT) {
               /* Initialize extra Fn keys */
               sony_acpi_eval_set_integer(hdl, "SN02", 0x04, NULL);
               sony_acpi_eval_set_integer(hdl, "SN07", 0x02, NULL);
               sony_acpi_eval_set_integer(hdl, "SN02", 0x10, NULL);
               sony_acpi_eval_set_integer(hdl, "SN07", 0x00, NULL);
               sony_acpi_eval_set_integer(hdl, "SN03", 0x02, NULL);
               sony_acpi_eval_set_integer(hdl, "SN07", 0x101, NULL);
       }
}

static void
sony_acpi_notify_handler(ACPI_HANDLE hdl, uint32_t notify, void *opaque)
{
       device_t dv = opaque;
       struct sony_acpi_softc *sc = device_private(dv);
       ACPI_STATUS rv;
       ACPI_INTEGER arg;

       if (notify == SONY_NOTIFY_FnKeyEvent) {
               rv = sony_acpi_eval_set_integer(hdl, "SN07", 0x202, &arg);
               if (ACPI_FAILURE(rv))
                       return;

               notify = arg & 0xff;
       }

       switch (notify) {
       case SONY_NOTIFY_BrightnessDownPressed:
               sony_acpi_brightness_down(dv);
               break;
       case SONY_NOTIFY_BrightnessUpPressed:
               sony_acpi_brightness_up(dv);
               break;
       case SONY_NOTIFY_BrightnessDownReleased:
       case SONY_NOTIFY_BrightnessUpReleased:
               break;
       case SONY_NOTIFY_SuspendPressed:
               if (!sc->sc_smpsw_valid)
                       break;
               sysmon_pswitch_event(&sc->sc_smpsw[SONY_PSW_SLEEP],
                   PSWITCH_EVENT_PRESSED);
               break;
       case SONY_NOTIFY_SuspendReleased:
               break;
       case SONY_NOTIFY_DisplaySwitchPressed:
               if (!sc->sc_smpsw_valid)
                       break;
               sysmon_pswitch_event(&sc->sc_smpsw[SONY_PSW_DISPLAY_CYCLE],
                   PSWITCH_EVENT_PRESSED);
               break;
       case SONY_NOTIFY_DisplaySwitchReleased:
               break;
       case SONY_NOTIFY_ZoomPressed:
               if (!sc->sc_smpsw_valid)
                       break;
               sysmon_pswitch_event(&sc->sc_smpsw[SONY_PSW_ZOOM],
                   PSWITCH_EVENT_PRESSED);
               break;
       case SONY_NOTIFY_ZoomReleased:
               break;
       default:
               aprint_debug_dev(dv, "unknown notify event 0x%x\n", notify);
               break;
       }
}

static bool
sony_acpi_suspend(device_t dv, const pmf_qual_t *qual)
{
       struct sony_acpi_softc *sc = device_private(dv);

       acpi_eval_integer(sc->sc_node->ad_handle, "GBRT", &sc->sc_pmstate.brt);

       return true;
}

static bool
sony_acpi_resume(device_t dv, const pmf_qual_t *qual)
{
       struct sony_acpi_softc *sc = device_private(dv);

       sony_acpi_eval_set_integer(sc->sc_node->ad_handle, "SBRT",
           sc->sc_pmstate.brt, NULL);
       sony_acpi_quirk_setup(sc);

       return true;
}

static void
sony_acpi_brightness_up(device_t dv)
{
       struct sony_acpi_softc *sc = device_private(dv);
       ACPI_INTEGER arg;
       ACPI_STATUS rv;

       rv = acpi_eval_integer(sc->sc_node->ad_handle, "GBRT", &arg);
       if (ACPI_FAILURE(rv))
               return;
       if (arg >= 8)
               arg = 8;
       else
               arg++;
       sony_acpi_eval_set_integer(sc->sc_node->ad_handle, "SBRT", arg, NULL);
}

static void
sony_acpi_brightness_down(device_t dv)
{
       struct sony_acpi_softc *sc = device_private(dv);
       ACPI_INTEGER arg;
       ACPI_STATUS rv;

       rv = acpi_eval_integer(sc->sc_node->ad_handle, "GBRT", &arg);
       if (ACPI_FAILURE(rv))
               return;
       if (arg <= 0)
               arg = 0;
       else
               arg--;
       sony_acpi_eval_set_integer(sc->sc_node->ad_handle, "SBRT", arg, NULL);
}

static ACPI_STATUS
sony_acpi_find_pic(ACPI_HANDLE hdl, uint32_t level,
   void *opaque, void **status)
{
       struct sony_acpi_softc *sc = opaque;
       ACPI_STATUS rv;
       ACPI_DEVICE_INFO *devinfo;

       rv = AcpiGetObjectInfo(hdl, &devinfo);
       if (ACPI_FAILURE(rv) || devinfo == NULL)
               return AE_OK;   /* we don't want to stop searching */

       if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
           devinfo->HardwareId.String &&
           strncmp(devinfo->HardwareId.String, "SNY6001", 7) == 0)
               sc->sc_has_pic = true;

       ACPI_FREE(devinfo);

       return AE_OK;
}

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