acpi_wakedev.c revision 1.2.2.3
1 /* $NetBSD: acpi_wakedev.c,v 1.2.2.3 2010/03/11 15:03:22 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: acpi_wakedev.c,v 1.2.2.3 2010/03/11 15:03:22 yamt Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/device.h> 34 #include <sys/kmem.h> 35 #include <sys/queue.h> 36 #include <sys/sysctl.h> 37 #include <sys/systm.h> 38 39 #include <dev/acpi/acpireg.h> 40 #include <dev/acpi/acpivar.h> 41 #include <dev/acpi/acpi_wakedev.h> 42 43 #define _COMPONENT ACPI_BUS_COMPONENT 44 ACPI_MODULE_NAME ("acpi_wakedev") 45 46 struct acpi_wakedev { 47 struct acpi_devnode *aw_node; 48 struct sysctllog *aw_sysctllog; 49 int aw_enabled; 50 51 TAILQ_ENTRY(acpi_wakedev) aw_list; 52 }; 53 54 struct acpi_wakedev; 55 static int acpi_wakedev_node = -1; 56 57 static TAILQ_HEAD(, acpi_wakedev) acpi_wakedevlist = 58 TAILQ_HEAD_INITIALIZER(acpi_wakedevlist); 59 60 static const char * const acpi_wakedev_default[] = { 61 "PNP0C0C", /* power button */ 62 "PNP0C0E", /* sleep button */ 63 "PNP0C0D", /* lid switch */ 64 "PNP03??", /* PC KBD port */ 65 NULL, 66 }; 67 68 static void acpi_wakedev_sysctl_add(struct acpi_wakedev *); 69 static bool acpi_wakedev_add(struct acpi_softc *, struct acpi_devnode *); 70 static void acpi_wakedev_print(struct acpi_wakedev *); 71 static void acpi_wakedev_prepare(struct acpi_devnode *, int, int); 72 73 SYSCTL_SETUP(sysctl_acpi_wakedev_setup, "sysctl hw.wake subtree setup") 74 { 75 const struct sysctlnode *rnode; 76 int err; 77 78 err = sysctl_createv(NULL, 0, NULL, NULL, 79 CTLFLAG_PERMANENT, 80 CTLTYPE_NODE, "hw", NULL, 81 NULL, 0, NULL, 0, CTL_HW, CTL_EOL); 82 if (err) 83 return; 84 err = sysctl_createv(NULL, 0, NULL, &rnode, 85 CTLFLAG_PERMANENT, 86 CTLTYPE_NODE, "wake", NULL, 87 NULL, 0, NULL, 0, 88 CTL_HW, CTL_CREATE, CTL_EOL); 89 if (err) 90 return; 91 acpi_wakedev_node = rnode->sysctl_num; 92 } 93 94 static void 95 acpi_wakedev_sysctl_add(struct acpi_wakedev *aw) 96 { 97 int err; 98 99 if (acpi_wakedev_node == -1) 100 return; 101 102 err = sysctl_createv(&aw->aw_sysctllog, 0, NULL, NULL, 103 CTLFLAG_READWRITE, CTLTYPE_INT, aw->aw_node->ad_name, 104 NULL, NULL, 0, &aw->aw_enabled, 0, 105 CTL_HW, acpi_wakedev_node, CTL_CREATE, CTL_EOL); 106 if (err) 107 aprint_error("%s: sysctl_createv(hw.wake.%s) failed (%d)\n", 108 __func__, aw->aw_node->ad_name, err); 109 } 110 111 static bool 112 acpi_wakedev_add(struct acpi_softc *sc, struct acpi_devnode *ad) 113 { 114 struct acpi_wakedev *aw; 115 ACPI_HANDLE hdl; 116 117 if (ACPI_FAILURE(AcpiGetHandle(ad->ad_handle, "_PRW", &hdl))) 118 return false; 119 120 aw = kmem_alloc(sizeof(*aw), KM_SLEEP); 121 if (aw == NULL) { 122 aprint_error("%s: kmem_alloc failed\n", __func__); 123 return false; 124 } 125 aw->aw_node = ad; 126 aw->aw_sysctllog = NULL; 127 if (acpi_match_hid(ad->ad_devinfo, acpi_wakedev_default)) 128 aw->aw_enabled = 1; 129 else 130 aw->aw_enabled = 0; 131 132 TAILQ_INSERT_TAIL(&acpi_wakedevlist, aw, aw_list); 133 134 acpi_wakedev_sysctl_add(aw); 135 136 return true; 137 } 138 139 static void 140 acpi_wakedev_print(struct acpi_wakedev *aw) 141 { 142 aprint_debug(" %s", aw->aw_node->ad_name); 143 } 144 145 int 146 acpi_wakedev_scan(struct acpi_softc *sc) 147 { 148 struct acpi_devnode *ad; 149 struct acpi_wakedev *aw; 150 ACPI_DEVICE_INFO *di; 151 int count = 0; 152 153 #define ACPI_STA_DEV_VALID \ 154 (ACPI_STA_DEV_PRESENT|ACPI_STA_DEV_ENABLED|ACPI_STA_DEV_OK) 155 156 SIMPLEQ_FOREACH(ad, &sc->sc_devnodes, ad_list) { 157 158 di = ad->ad_devinfo; 159 160 if (di->Type != ACPI_TYPE_DEVICE) 161 continue; 162 163 if ((di->Valid & ACPI_VALID_STA) != 0 && 164 (di->CurrentStatus & ACPI_STA_DEV_VALID) != 165 ACPI_STA_DEV_VALID) 166 continue; 167 168 if (acpi_wakedev_add(sc, ad) == true) 169 ++count; 170 } 171 172 #undef ACPI_STA_DEV_VALID 173 174 if (count == 0) 175 return 0; 176 177 aprint_debug_dev(sc->sc_dev, "wakeup devices:"); 178 TAILQ_FOREACH(aw, &acpi_wakedevlist, aw_list) 179 acpi_wakedev_print(aw); 180 aprint_debug("\n"); 181 182 return count; 183 } 184 185 void 186 acpi_wakedev_commit(struct acpi_softc *sc, int state) 187 { 188 struct acpi_wakedev *aw; 189 190 /* 191 * As noted in ACPI 3.0 (p. 243), preparing 192 * a device for wakeup is a two-step process: 193 * 194 * 1. Enable all power resources in _PRW. 195 * 196 * 2. If present, execute _DSW/_PSW method. 197 * 198 * XXX: The first one is yet to be implemented. 199 */ 200 TAILQ_FOREACH(aw, &acpi_wakedevlist, aw_list) { 201 202 if (aw->aw_enabled) { 203 aprint_debug_dev(sc->sc_dev, "set wake GPE (%s)\n", 204 aw->aw_node->ad_name); 205 acpi_set_wake_gpe(aw->aw_node->ad_handle); 206 } else 207 acpi_clear_wake_gpe(aw->aw_node->ad_handle); 208 209 acpi_wakedev_prepare(aw->aw_node, aw->aw_enabled, state); 210 } 211 } 212 213 static void 214 acpi_wakedev_prepare(struct acpi_devnode *ad, int enable, int state) 215 { 216 ACPI_OBJECT_LIST arg; 217 ACPI_OBJECT obj[3]; 218 ACPI_STATUS rv; 219 220 /* 221 * First try to call the Device Sleep Wake control method, _DSW. 222 * Only if this is not available, resort to to the Power State 223 * Wake control method, _PSW, which was deprecated in ACPI 3.0. 224 * 225 * The arguments to these methods are as follows: 226 * 227 * arg0 arg1 arg2 228 * ---- ---- ---- 229 * _PSW 0: disable 230 * 1: enable 231 * 232 * _DSW 0: disable 0: S0 0: D0 233 * 1: enable 1: S1 1: D0 or D1 234 * 2: D0, D1, or D2 235 * x: Sx 3: D0, D1, D2 or D3 236 */ 237 arg.Count = 3; 238 arg.Pointer = obj; 239 240 obj[0].Integer.Value = enable; 241 obj[1].Integer.Value = state; 242 obj[2].Integer.Value = 3; 243 244 obj[0].Type = obj[1].Type = obj[2].Type = ACPI_TYPE_INTEGER; 245 246 rv = AcpiEvaluateObject(ad->ad_handle, "_DSW", &arg, NULL); 247 248 if (ACPI_SUCCESS(rv)) 249 return; 250 251 if (rv != AE_NOT_FOUND) 252 goto fail; 253 254 rv = acpi_eval_set_integer(ad->ad_handle, "_PSW", enable); 255 256 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 257 goto fail; 258 259 return; 260 261 fail: 262 aprint_error_dev(ad->ad_device, "failed to evaluate wake " 263 "control method: %s\n", AcpiFormatException(rv)); 264 } 265
Indexes created Wed Oct 01 19:09:53 GMT 2025