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dalb_acpi.c revision 1.16.4.1 
      1 /*	$NetBSD: dalb_acpi.c,v 1.16.4.1 2011/02/17 12:00:10 bouyer 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 1.16.4.1 2011/02/17 12:00:10 bouyer 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/module.h>
     40 #include <sys/systm.h>
     41 
     42 #include <dev/acpi/acpireg.h>
     43 #include <dev/acpi/acpivar.h>
     44 
     45 #define _COMPONENT          ACPI_RESOURCE_COMPONENT
     46 ACPI_MODULE_NAME            ("dalb_acpi")
     47 
     48 #define DALB_ID_INVALID		-1
     49 
     50 struct acpi_dalb_softc {
     51 	device_t sc_dev;
     52 	struct acpi_devnode *sc_node;
     53 
     54 	ACPI_INTEGER sc_usageid;
     55 
     56 	/* There's one PNP0C32 ACPI device for each button.
     57 	 * Therefore, one instance is enough. */
     58 	struct sysmon_pswitch sc_smpsw;
     59 	bool sc_smpsw_valid;
     60 };
     61 
     62 static int	acpi_dalb_match(device_t, cfdata_t, void *);
     63 static void	acpi_dalb_attach(device_t, device_t, void *);
     64 static int	acpi_dalb_detach(device_t, int);
     65 static void	acpi_dalb_notify_handler(ACPI_HANDLE, uint32_t, void *);
     66 static bool	acpi_dalb_resume(device_t, const pmf_qual_t *);
     67 
     68 static void	acpi_dalb_get_wakeup_hotkeys(void *opaque);
     69 static void	acpi_dalb_get_runtime_hotkeys(void *opaque);
     70 
     71 CFATTACH_DECL_NEW(acpidalb, sizeof(struct acpi_dalb_softc),
     72     acpi_dalb_match, acpi_dalb_attach, acpi_dalb_detach, NULL);
     73 
     74 static const char * const acpi_dalb_ids[] = {
     75         "PNP0C32", /* Direct Application Launch Button */
     76         NULL
     77 };
     78 
     79 #define DALB_SYSTEM_WAKEUP	0x02
     80 #define DALB_SYSTEM_RUNTIME	0x80
     81 
     82 static int
     83 acpi_dalb_match(device_t parent, cfdata_t match, void *aux)
     84 {
     85 	struct acpi_attach_args *aa = aux;
     86 
     87 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     88 		return 0;
     89 
     90 	return acpi_match_hid(aa->aa_node->ad_devinfo, acpi_dalb_ids);
     91 }
     92 
     93 static void
     94 acpi_dalb_sysmon_init(struct acpi_dalb_softc *sc)
     95 {
     96 	sc->sc_smpsw_valid = true;
     97 	sc->sc_smpsw.smpsw_name = device_xname(sc->sc_dev);
     98 	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_HOTKEY;
     99 	if (sysmon_pswitch_register(&sc->sc_smpsw)) {
    100 		aprint_error_dev(sc->sc_dev,
    101 			"couldn't register sleep with sysmon\n");
    102 		sc->sc_smpsw_valid = false;
    103 	}
    104 }
    105 
    106 
    107 static void
    108 acpi_dalb_init(device_t dev)
    109 {
    110 	struct acpi_dalb_softc *sc = device_private(dev);
    111 	ACPI_OBJECT *obj;
    112 	ACPI_STATUS rv;
    113 	ACPI_BUFFER ret;
    114 
    115 	rv = acpi_eval_struct(sc->sc_node->ad_handle, "GHID", &ret);
    116 
    117 	if (ACPI_FAILURE(rv) || ret.Pointer == NULL) {
    118 		aprint_error_dev(dev,
    119 			"couldn't enable notify handler: (%s)\n",
    120 			AcpiFormatException(rv));
    121 		return;
    122 	}
    123 
    124 	obj = ret.Pointer;
    125 
    126 	if (obj->Type != ACPI_TYPE_BUFFER) {
    127 		sc->sc_usageid = DALB_ID_INVALID;
    128 		aprint_debug_dev(dev, "invalid ACPI type: %u\n", obj->Type);
    129 		goto out;
    130 	}
    131 
    132 	switch (obj->Buffer.Length) {
    133 	case 1:
    134 		sc->sc_usageid = *(uint8_t *)obj->Buffer.Pointer;
    135 		break;
    136 	case 2:
    137 		sc->sc_usageid = le16toh(*(uint16_t *)obj->Buffer.Pointer);
    138 		break;
    139 	case 4:
    140 		sc->sc_usageid = le32toh(*(uint32_t *)obj->Buffer.Pointer);
    141 		break;
    142 	default:
    143 		aprint_debug_dev(dev, "unhandled ret.Length: 0x%lx\n",
    144 			(unsigned long)obj->Buffer.Length);
    145 		sc->sc_usageid = DALB_ID_INVALID;
    146 		break;
    147 	}
    148 
    149 out:
    150 	ACPI_FREE(ret.Pointer);
    151 }
    152 
    153 static void
    154 acpi_dalb_attach(device_t parent, device_t self, void *aux)
    155 {
    156 	struct acpi_dalb_softc *sc = device_private(self);
    157 	struct acpi_attach_args *aa = aux;
    158 
    159 	aprint_naive("\n");
    160 	aprint_normal(": Direct Application Launch Button\n");
    161 
    162 	sc->sc_dev = self;
    163 	sc->sc_node = aa->aa_node;
    164 
    165 	config_interrupts(self, acpi_dalb_init);
    166 
    167 	(void)pmf_device_register(self, NULL, acpi_dalb_resume);
    168 	(void)acpi_register_notify(sc->sc_node, acpi_dalb_notify_handler);
    169 
    170 	sc->sc_smpsw_valid = false;
    171 	acpi_dalb_sysmon_init(sc);
    172 }
    173 
    174 static int
    175 acpi_dalb_detach(device_t self, int flags)
    176 {
    177 	struct acpi_dalb_softc *sc = device_private(self);
    178 
    179 	pmf_device_deregister(self);
    180 	acpi_deregister_notify(sc->sc_node);
    181 	sysmon_pswitch_unregister(&sc->sc_smpsw);
    182 
    183 	return 0;
    184 }
    185 
    186 static void
    187 acpi_dalb_notify_handler(ACPI_HANDLE hdl, uint32_t notify, void *opaque)
    188 {
    189 	device_t dev = opaque;
    190 	struct acpi_dalb_softc *sc = device_private(dev);
    191 	ACPI_STATUS rv;
    192 
    193 	switch (notify) {
    194 	case DALB_SYSTEM_WAKEUP:
    195 		rv = AcpiOsExecute(OSL_NOTIFY_HANDLER,
    196 			acpi_dalb_get_wakeup_hotkeys, dev);
    197 		break;
    198 	case DALB_SYSTEM_RUNTIME:
    199 		rv = AcpiOsExecute(OSL_NOTIFY_HANDLER,
    200 			acpi_dalb_get_runtime_hotkeys, dev);
    201 		break;
    202 
    203 	default:
    204 		aprint_error_dev(dev,
    205 			"unknown notification event 0x%x from button 0x%x\n",
    206 			notify, (uint32_t)sc->sc_usageid);
    207 		return;
    208 	}
    209 
    210 	if (ACPI_FAILURE(rv))
    211 		aprint_error_dev(dev, "couldn't queue hotkey handler: %s\n",
    212 			AcpiFormatException(rv));
    213 }
    214 
    215 static void
    216 acpi_dalb_get_wakeup_hotkeys(void *opaque)
    217 {
    218 	device_t dev = opaque;
    219 	struct acpi_dalb_softc *sc = device_private(dev);
    220 
    221 	if (!sc->sc_smpsw_valid)
    222 		return;
    223 
    224 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
    225 		"invoking %s (wakeup)\n", sc->sc_smpsw.smpsw_name));
    226 
    227 	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
    228 }
    229 
    230 static void
    231 acpi_dalb_get_runtime_hotkeys(void *opaque)
    232 {
    233 	device_t dev = opaque;
    234 	struct acpi_dalb_softc *sc = device_private(dev);
    235 
    236 	if (!sc->sc_smpsw_valid)
    237 		return;
    238 
    239 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
    240 		"invoking %s (runtime)\n", sc->sc_smpsw.smpsw_name));
    241 
    242 	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
    243 }
    244 
    245 static bool
    246 acpi_dalb_resume(device_t dev, const pmf_qual_t *qual)
    247 {
    248 	struct acpi_dalb_softc *sc = device_private(dev);
    249 	ACPI_STATUS rv;
    250 	ACPI_BUFFER ret;
    251 
    252 	rv = acpi_eval_struct(sc->sc_node->ad_handle, "GHID", &ret);
    253 	if (ACPI_FAILURE(rv)) {
    254 		aprint_error_dev(dev, "couldn't evaluate GHID: %s\n",
    255 		    AcpiFormatException(rv));
    256 		return false;
    257 	}
    258 	if (ret.Pointer)
    259 		ACPI_FREE(ret.Pointer);
    260 
    261 	return true;
    262 }
    263 
    264 MODULE(MODULE_CLASS_DRIVER, acpidalb, NULL);
    265 
    266 #ifdef _MODULE
    267 #include "ioconf.c"
    268 #endif
    269 
    270 static int
    271 acpidalb_modcmd(modcmd_t cmd, void *aux)
    272 {
    273 	int rv = 0;
    274 
    275 	switch (cmd) {
    276 
    277 	case MODULE_CMD_INIT:
    278 
    279 #ifdef _MODULE
    280 		rv = config_init_component(cfdriver_ioconf_acpidalb,
    281 		    cfattach_ioconf_acpidalb, cfdata_ioconf_acpidalb);
    282 #endif
    283 		break;
    284 
    285 	case MODULE_CMD_FINI:
    286 
    287 #ifdef _MODULE
    288 		rv = config_fini_component(cfdriver_ioconf_acpidalb,
    289 		    cfattach_ioconf_acpidalb, cfdata_ioconf_acpidalb);
    290 #endif
    291 		break;
    292 
    293 	default:
    294 		rv = ENOTTY;
    295 	}
    296 
    297 	return rv;
    298 }
    299