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dalb_acpi.c revision 1.11
      1 /*	$NetBSD: dalb_acpi.c,v 1.11 2010/04/09 15:45:59 jruoho Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 Christoph Egger <cegger (at) netbsd.org>
      5  * Copyright (c) 2008 Jared D. McNeill <jmcneill (at) netbsd.org>
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: dalb_acpi.c,v 1.11 2010/04/09 15:45:59 jruoho Exp $");
     31 
     32 /*
     33  * Direct Application Launch Button:
     34  * http://www.microsoft.com/whdc/system/vista/DirAppLaunch.mspx
     35  */
     36 
     37 #include <sys/param.h>
     38 #include <sys/device.h>
     39 #include <sys/systm.h>
     40 
     41 #include <dev/acpi/acpireg.h>
     42 #include <dev/acpi/acpivar.h>
     43 
     44 #define _COMPONENT          ACPI_RESOURCE_COMPONENT
     45 ACPI_MODULE_NAME            ("dalb_acpi")
     46 
     47 #define DALB_ID_INVALID		-1
     48 
     49 struct acpi_dalb_softc {
     50 	device_t sc_dev;
     51 	struct acpi_devnode *sc_node;
     52 
     53 	ACPI_INTEGER sc_usageid;
     54 
     55 	/* There's one PNP0C32 ACPI device for each button.
     56 	 * Therefore, one instance is enough. */
     57 	struct sysmon_pswitch sc_smpsw;
     58 	bool sc_smpsw_valid;
     59 };
     60 
     61 static int	acpi_dalb_match(device_t, cfdata_t, void *);
     62 static void	acpi_dalb_attach(device_t, device_t, void *);
     63 static int	acpi_dalb_detach(device_t, int);
     64 static void	acpi_dalb_notify_handler(ACPI_HANDLE, UINT32, void *);
     65 static bool	acpi_dalb_resume(device_t, const pmf_qual_t *);
     66 
     67 static void	acpi_dalb_get_wakeup_hotkeys(void *opaque);
     68 static void	acpi_dalb_get_runtime_hotkeys(void *opaque);
     69 
     70 CFATTACH_DECL_NEW(acpidalb, sizeof(struct acpi_dalb_softc),
     71     acpi_dalb_match, acpi_dalb_attach, acpi_dalb_detach, NULL);
     72 
     73 static const char * const acpi_dalb_ids[] = {
     74         "PNP0C32", /* Direct Application Launch Button */
     75         NULL
     76 };
     77 
     78 #define DALB_SYSTEM_WAKEUP	0x02
     79 #define DALB_SYSTEM_RUNTIME	0x80
     80 
     81 static int
     82 acpi_dalb_match(device_t parent, cfdata_t match, void *aux)
     83 {
     84 	struct acpi_attach_args *aa = aux;
     85 
     86 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     87 		return 0;
     88 
     89 	return acpi_match_hid(aa->aa_node->ad_devinfo, acpi_dalb_ids);
     90 }
     91 
     92 static void
     93 acpi_dalb_sysmon_init(struct acpi_dalb_softc *sc)
     94 {
     95 	sc->sc_smpsw_valid = true;
     96 	sc->sc_smpsw.smpsw_name = device_xname(sc->sc_dev);
     97 	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_HOTKEY;
     98 	if (sysmon_pswitch_register(&sc->sc_smpsw)) {
     99 		aprint_error_dev(sc->sc_dev,
    100 			"couldn't register sleep with sysmon\n");
    101 		sc->sc_smpsw_valid = false;
    102 	}
    103 }
    104 
    105 
    106 static void
    107 acpi_dalb_init(device_t dev)
    108 {
    109 	struct acpi_dalb_softc *sc = device_private(dev);
    110 	ACPI_OBJECT *obj;
    111 	ACPI_STATUS rv;
    112 	ACPI_BUFFER ret;
    113 
    114 	rv = acpi_eval_struct(sc->sc_node->ad_handle, "GHID", &ret);
    115 	if (ACPI_FAILURE(rv) || ret.Pointer == NULL) {
    116 		aprint_error_dev(dev,
    117 			"couldn't enable notify handler: (%s)\n",
    118 			AcpiFormatException(rv));
    119 		return;
    120 	}
    121 
    122 	obj = (ACPI_OBJECT *)ret.Pointer;
    123 	if (obj->Type != ACPI_TYPE_BUFFER) {
    124 		sc->sc_usageid = DALB_ID_INVALID;
    125 		aprint_debug_dev(dev, "invalid ACPI type: %u\n", obj->Type);
    126 		goto out;
    127 	}
    128 
    129 	switch (obj->Buffer.Length) {
    130 	case 1:
    131 		sc->sc_usageid = *(uint8_t *)obj->Buffer.Pointer;
    132 		break;
    133 	case 2:
    134 		sc->sc_usageid = le16toh(*(uint16_t *)obj->Buffer.Pointer);
    135 		break;
    136 	case 4:
    137 		sc->sc_usageid = le32toh(*(uint32_t *)obj->Buffer.Pointer);
    138 		break;
    139 	default:
    140 		aprint_debug_dev(dev, "unhandled ret.Length: 0x%lx\n",
    141 			(unsigned long)obj->Buffer.Length);
    142 		sc->sc_usageid = DALB_ID_INVALID;
    143 		break;
    144 	}
    145 
    146 out:
    147 	ACPI_FREE(ret.Pointer);
    148 }
    149 
    150 static void
    151 acpi_dalb_attach(device_t parent, device_t self, void *aux)
    152 {
    153 	struct acpi_dalb_softc *sc = device_private(self);
    154 	struct acpi_attach_args *aa = aux;
    155 	ACPI_STATUS rv;
    156 
    157 	aprint_naive("\n");
    158 	aprint_normal(": Direct Application Launch Button\n");
    159 
    160 	sc->sc_node = aa->aa_node;
    161 	sc->sc_dev = self;
    162 
    163 	config_interrupts(self, acpi_dalb_init);
    164 
    165 	/* Install notify handler */
    166 	rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
    167 		ACPI_ALL_NOTIFY, acpi_dalb_notify_handler, self);
    168 	if (ACPI_FAILURE(rv))
    169 		aprint_error_dev(self,
    170 			"couldn't install notify handler: (%s)\n",
    171 			AcpiFormatException(rv));
    172 
    173 	sc->sc_smpsw_valid = false;
    174 	acpi_dalb_sysmon_init(sc);
    175 
    176 	if (!pmf_device_register(self, NULL, acpi_dalb_resume))
    177 		aprint_error_dev(self, "couldn't establish power handler\n");
    178 }
    179 
    180 static int
    181 acpi_dalb_detach(device_t self, int flags)
    182 {
    183 	struct acpi_dalb_softc *sc = device_private(self);
    184 	ACPI_STATUS rv;
    185 
    186 	rv = AcpiRemoveNotifyHandler(sc->sc_node->ad_handle,
    187 	    ACPI_ALL_NOTIFY, acpi_dalb_notify_handler);
    188 
    189 	if (ACPI_FAILURE(rv))
    190 		return EBUSY;
    191 
    192 	pmf_device_deregister(self);
    193 	sysmon_pswitch_unregister(&sc->sc_smpsw);
    194 
    195 	return 0;
    196 }
    197 
    198 static void
    199 acpi_dalb_notify_handler(ACPI_HANDLE hdl, UINT32 notify, void *opaque)
    200 {
    201 	device_t dev = opaque;
    202 	struct acpi_dalb_softc *sc = device_private(dev);
    203 	ACPI_STATUS rv;
    204 
    205 	switch (notify) {
    206 	case DALB_SYSTEM_WAKEUP:
    207 		rv = AcpiOsExecute(OSL_NOTIFY_HANDLER,
    208 			acpi_dalb_get_wakeup_hotkeys, dev);
    209 		break;
    210 	case DALB_SYSTEM_RUNTIME:
    211 		rv = AcpiOsExecute(OSL_NOTIFY_HANDLER,
    212 			acpi_dalb_get_runtime_hotkeys, dev);
    213 		break;
    214 
    215 	default:
    216 		aprint_error_dev(dev,
    217 			"unknown notification event 0x%x from button 0x%x\n",
    218 			notify, (uint32_t)sc->sc_usageid);
    219 		return;
    220 	}
    221 
    222 	if (ACPI_FAILURE(rv))
    223 		aprint_error_dev(dev, "couldn't queue hotkey handler: %s\n",
    224 			AcpiFormatException(rv));
    225 }
    226 
    227 static void
    228 acpi_dalb_get_wakeup_hotkeys(void *opaque)
    229 {
    230 	device_t dev = opaque;
    231 	struct acpi_dalb_softc *sc = device_private(dev);
    232 
    233 	if (!sc->sc_smpsw_valid)
    234 		return;
    235 
    236 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
    237 		"%s: %s: invoking sysmon_pswitch_event\n",
    238 		sc->sc_smpsw.smpsw_name, __func__));
    239 
    240 	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
    241 }
    242 
    243 static void
    244 acpi_dalb_get_runtime_hotkeys(void *opaque)
    245 {
    246 	device_t dev = opaque;
    247 	struct acpi_dalb_softc *sc = device_private(dev);
    248 
    249 	if (!sc->sc_smpsw_valid)
    250 		return;
    251 
    252 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
    253 		"%s: %s: invoking sysmon_pswitch_event\n",
    254 		sc->sc_smpsw.smpsw_name, __func__));
    255 
    256 	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
    257 }
    258 
    259 static bool
    260 acpi_dalb_resume(device_t dev, const pmf_qual_t *qual)
    261 {
    262 	struct acpi_dalb_softc *sc = device_private(dev);
    263 	ACPI_STATUS rv;
    264 	ACPI_BUFFER ret;
    265 
    266 	rv = acpi_eval_struct(sc->sc_node->ad_handle, "GHID", &ret);
    267 	if (ACPI_FAILURE(rv)) {
    268 		aprint_error_dev(dev, "couldn't evaluate GHID: %s\n",
    269 		    AcpiFormatException(rv));
    270 		return false;
    271 	}
    272 	if (ret.Pointer)
    273 		ACPI_FREE(ret.Pointer);
    274 
    275 	return true;
    276 }
    277