acpi_wakedev.c revision 1.4
1 /* $NetBSD: acpi_wakedev.c,v 1.4 2010/03/05 21:01:44 jruoho 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 1.4 2010/03/05 21:01:44 jruoho 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 static void acpi_wakedev_prepare(struct acpi_devnode *, int, int); 44 45 struct acpi_wakedev; 46 47 static TAILQ_HEAD(, acpi_wakedev) acpi_wakedevlist = 48 TAILQ_HEAD_INITIALIZER(acpi_wakedevlist); 49 static int acpi_wakedev_node = -1; 50 51 struct acpi_wakedev { 52 struct acpi_devnode *aw_node; 53 int aw_enabled; 54 struct sysctllog *aw_sysctllog; 55 TAILQ_ENTRY(acpi_wakedev) aw_list; 56 }; 57 58 static const char * const acpi_wakedev_default[] = { 59 "PNP0C0C", /* power button */ 60 "PNP0C0E", /* sleep button */ 61 "PNP0C0D", /* lid switch */ 62 "PNP03??", /* PC KBD port */ 63 NULL, 64 }; 65 66 SYSCTL_SETUP(sysctl_acpi_wakedev_setup, "sysctl hw.wake subtree setup") 67 { 68 const struct sysctlnode *rnode; 69 int err; 70 71 err = sysctl_createv(NULL, 0, NULL, NULL, 72 CTLFLAG_PERMANENT, 73 CTLTYPE_NODE, "hw", NULL, 74 NULL, 0, NULL, 0, CTL_HW, CTL_EOL); 75 if (err) 76 return; 77 err = sysctl_createv(NULL, 0, NULL, &rnode, 78 CTLFLAG_PERMANENT, 79 CTLTYPE_NODE, "wake", NULL, 80 NULL, 0, NULL, 0, 81 CTL_HW, CTL_CREATE, CTL_EOL); 82 if (err) 83 return; 84 acpi_wakedev_node = rnode->sysctl_num; 85 } 86 87 static void 88 acpi_wakedev_sysctl_add(struct acpi_wakedev *aw) 89 { 90 int err; 91 92 if (acpi_wakedev_node == -1) 93 return; 94 95 err = sysctl_createv(&aw->aw_sysctllog, 0, NULL, NULL, 96 CTLFLAG_READWRITE, CTLTYPE_INT, aw->aw_node->ad_name, 97 NULL, NULL, 0, &aw->aw_enabled, 0, 98 CTL_HW, acpi_wakedev_node, CTL_CREATE, CTL_EOL); 99 if (err) 100 printf("acpi_wakedev_sysctl_add: " 101 "sysctl_createv(hw.wake.%s) failed. (%d)\n", 102 aw->aw_node->ad_name, err); 103 } 104 105 static bool 106 acpi_wakedev_add(struct acpi_softc *sc, struct acpi_devnode *ad) 107 { 108 struct acpi_wakedev *aw; 109 ACPI_HANDLE hdl; 110 111 if (ACPI_FAILURE(AcpiGetHandle(ad->ad_handle, "_PRW", &hdl))) 112 return false; 113 114 aw = kmem_alloc(sizeof(*aw), KM_SLEEP); 115 if (aw == NULL) { 116 aprint_error("acpi_wakedev_add: kmem_alloc failed\n"); 117 return false; 118 } 119 aw->aw_node = ad; 120 aw->aw_sysctllog = NULL; 121 if (acpi_match_hid(ad->ad_devinfo, acpi_wakedev_default)) 122 aw->aw_enabled = 1; 123 else 124 aw->aw_enabled = 0; 125 126 TAILQ_INSERT_TAIL(&acpi_wakedevlist, aw, aw_list); 127 128 acpi_wakedev_sysctl_add(aw); 129 130 return true; 131 } 132 133 static void 134 acpi_wakedev_print(struct acpi_wakedev *aw) 135 { 136 aprint_debug(" %s", aw->aw_node->ad_name); 137 } 138 139 int 140 acpi_wakedev_scan(struct acpi_softc *sc) 141 { 142 struct acpi_scope *as; 143 struct acpi_devnode *ad; 144 struct acpi_wakedev *aw; 145 ACPI_DEVICE_INFO *di; 146 int count = 0; 147 148 #define ACPI_STA_DEV_VALID \ 149 (ACPI_STA_DEV_PRESENT|ACPI_STA_DEV_ENABLED|ACPI_STA_DEV_OK) 150 151 TAILQ_FOREACH(as, &sc->sc_scopes, as_list) 152 TAILQ_FOREACH(ad, &as->as_devnodes, ad_list) { 153 di = ad->ad_devinfo; 154 if (di->Type != ACPI_TYPE_DEVICE) 155 continue; 156 if ((di->Valid & ACPI_VALID_STA) != 0 && 157 (di->CurrentStatus & ACPI_STA_DEV_VALID) != 158 ACPI_STA_DEV_VALID) 159 continue; 160 if (acpi_wakedev_add(sc, ad) == true) 161 ++count; 162 } 163 164 #undef ACPI_STA_DEV_VALID 165 166 if (count == 0) 167 return 0; 168 169 aprint_debug_dev(sc->sc_dev, "wakeup devices:"); 170 TAILQ_FOREACH(aw, &acpi_wakedevlist, aw_list) 171 acpi_wakedev_print(aw); 172 aprint_debug("\n"); 173 174 return count; 175 } 176 177 void 178 acpi_wakedev_commit(struct acpi_softc *sc, int state) 179 { 180 struct acpi_wakedev *aw; 181 182 /* 183 * As noted in ACPI 3.0 (p. 243), preparing 184 * a device for wakeup is a two-step process: 185 * 186 * 1. Enable all power resources in _PRW. 187 * 188 * 2. If present, execute _DSW/_PSW method. 189 * 190 * XXX: The first one is yet to be implemented. 191 */ 192 TAILQ_FOREACH(aw, &acpi_wakedevlist, aw_list) { 193 194 if (aw->aw_enabled) { 195 aprint_debug_dev(sc->sc_dev, "set wake GPE (%s)\n", 196 aw->aw_node->ad_name); 197 acpi_set_wake_gpe(aw->aw_node->ad_handle); 198 } else 199 acpi_clear_wake_gpe(aw->aw_node->ad_handle); 200 201 acpi_wakedev_prepare(aw->aw_node, aw->aw_enabled, state); 202 } 203 } 204 205 static void 206 acpi_wakedev_prepare(struct acpi_devnode *ad, int enable, int state) 207 { 208 ACPI_OBJECT_LIST arg; 209 ACPI_OBJECT obj[3]; 210 ACPI_STATUS rv; 211 212 /* 213 * First try to call the Device Sleep Wake control method, _DSW. 214 * Only if this is not available, resort to to the Power State 215 * Wake control method, _PSW, which was deprecated in ACPI 3.0. 216 * 217 * The arguments to these methods are as follows: 218 * 219 * arg0 arg1 arg2 220 * ---- ---- ---- 221 * _PSW 0: disable 222 * 1: enable 223 * 224 * _DSW 0: disable 0: S0 0: D0 225 * 1: enable 1: S1 1: D0 or D1 226 * 2: D0, D1, or D2 227 * x: Sx 3: D0, D1, D2 or D3 228 */ 229 arg.Count = 3; 230 arg.Pointer = obj; 231 232 obj[0].Integer.Value = enable; 233 obj[1].Integer.Value = state; 234 obj[2].Integer.Value = 3; 235 236 obj[0].Type = obj[1].Type = obj[2].Type = ACPI_TYPE_INTEGER; 237 238 rv = AcpiEvaluateObject(ad->ad_handle, "_DSW", &arg, NULL); 239 240 if (ACPI_SUCCESS(rv)) 241 return; 242 243 if (rv != AE_NOT_FOUND) 244 goto fail; 245 246 rv = acpi_eval_set_integer(ad->ad_handle, "_PSW", enable); 247 248 if (ACPI_FAILURE(rv) && rv != AE_NOT_FOUND) 249 goto fail; 250 251 return; 252 253 fail: 254 aprint_error_dev(ad->ad_device, "failed to evaluate wake " 255 "control method: %s\n", AcpiFormatException(rv)); 256 } 257 258
Indexes created Mon Sep 22 13:09:51 GMT 2025