acpi_acad.c revision 151610
1/*- 2 * Copyright (c) 2000 Takanori Watanabe 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi_acad.c 151610 2005-10-24 05:34:21Z njl $"); 29 30#include "opt_acpi.h" 31#include <sys/param.h> 32#include <sys/kernel.h> 33#include <sys/bus.h> 34 35#include <machine/bus.h> 36#include <sys/rman.h> 37#include <sys/ioccom.h> 38#include <sys/malloc.h> 39#include <sys/module.h> 40#include <sys/conf.h> 41#include <sys/power.h> 42 43#include <contrib/dev/acpica/acpi.h> 44#include <dev/acpica/acpivar.h> 45#include <dev/acpica/acpiio.h> 46#include <isa/isavar.h> 47#include <isa/pnpvar.h> 48 49/* Hooks for the ACPI CA debugging infrastructure */ 50#define _COMPONENT ACPI_AC_ADAPTER 51ACPI_MODULE_NAME("AC_ADAPTER") 52 53/* Number of times to retry initialization before giving up. */ 54#define ACPI_ACAD_RETRY_MAX 6 55 56#define ACPI_POWERSOURCE_STAT_CHANGE 0x80 57 58struct acpi_acad_softc { 59 int status; 60}; 61 62static void acpi_acad_get_status(void *); 63static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *); 64static int acpi_acad_probe(device_t); 65static int acpi_acad_attach(device_t); 66static int acpi_acad_ioctl(u_long, caddr_t, void *); 67static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS); 68static void acpi_acad_init_acline(void *arg); 69static void acpi_acad_ac_only(void *arg); 70 71static device_method_t acpi_acad_methods[] = { 72 /* Device interface */ 73 DEVMETHOD(device_probe, acpi_acad_probe), 74 DEVMETHOD(device_attach, acpi_acad_attach), 75 76 {0, 0} 77}; 78 79static driver_t acpi_acad_driver = { 80 "acpi_acad", 81 acpi_acad_methods, 82 sizeof(struct acpi_acad_softc), 83}; 84 85static devclass_t acpi_acad_devclass; 86DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0); 87MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1); 88 89ACPI_SERIAL_DECL(acad, "ACPI AC adapter"); 90 91SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL); 92 93static void 94acpi_acad_get_status(void *context) 95{ 96 struct acpi_acad_softc *sc; 97 device_t dev; 98 ACPI_HANDLE h; 99 int newstatus; 100 101 dev = context; 102 sc = device_get_softc(dev); 103 h = acpi_get_handle(dev); 104 newstatus = -1; 105 acpi_GetInteger(h, "_PSR", &newstatus); 106 107 /* If status is valid and has changed, notify the system. */ 108 ACPI_SERIAL_BEGIN(acad); 109 if (newstatus != -1 && sc->status != newstatus) { 110 sc->status = newstatus; 111 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE : 112 POWER_PROFILE_ECONOMY); 113 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 114 "%s Line\n", newstatus ? "On" : "Off"); 115 acpi_UserNotify("ACAD", h, newstatus); 116 } 117 ACPI_SERIAL_END(acad); 118} 119 120static void 121acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 122{ 123 device_t dev; 124 125 dev = (device_t)context; 126 switch (notify) { 127 case ACPI_NOTIFY_BUS_CHECK: 128 case ACPI_NOTIFY_DEVICE_CHECK: 129 case ACPI_POWERSOURCE_STAT_CHANGE: 130 /* Temporarily. It is better to notify policy manager */ 131 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context); 132 break; 133 default: 134 device_printf(dev, "unknown notify %#x\n", notify); 135 break; 136 } 137} 138 139static int 140acpi_acad_probe(device_t dev) 141{ 142 static char *acad_ids[] = { "ACPI0003", NULL }; 143 144 if (acpi_disabled("acad") || 145 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL) 146 return (ENXIO); 147 148 device_set_desc(dev, "AC Adapter"); 149 return (0); 150} 151 152static int 153acpi_acad_attach(device_t dev) 154{ 155 struct acpi_acad_softc *sc; 156 struct acpi_softc *acpi_sc; 157 ACPI_HANDLE handle; 158 int error; 159 160 sc = device_get_softc(dev); 161 handle = acpi_get_handle(dev); 162 163 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev); 164 if (error != 0) 165 return (error); 166 167 if (device_get_unit(dev) == 0) { 168 acpi_sc = acpi_device_get_parent_softc(dev); 169 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx, 170 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 171 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD, 172 &sc->status, 0, acpi_acad_sysctl, "I", ""); 173 } 174 175 /* Get initial status after whole system is up. */ 176 sc->status = -1; 177 178 /* 179 * Install both system and device notify handlers since the Casio 180 * FIVA needs them. 181 */ 182 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY, 183 acpi_acad_notify_handler, dev); 184 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev); 185 186 return (0); 187} 188 189static int 190acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg) 191{ 192 struct acpi_acad_softc *sc; 193 device_t dev; 194 195 dev = (device_t)arg; 196 sc = device_get_softc(dev); 197 198 /* 199 * No security check required: information retrieval only. If 200 * new functions are added here, a check might be required. 201 */ 202 switch (cmd) { 203 case ACPIIO_ACAD_GET_STATUS: 204 acpi_acad_get_status(dev); 205 *(int *)addr = sc->status; 206 break; 207 default: 208 break; 209 } 210 211 return (0); 212} 213 214static int 215acpi_acad_sysctl(SYSCTL_HANDLER_ARGS) 216{ 217 int val, error; 218 219 if (acpi_acad_get_acline(&val) != 0) 220 return (ENXIO); 221 222 val = *(u_int *)oidp->oid_arg1; 223 error = sysctl_handle_int(oidp, &val, 0, req); 224 return (error); 225} 226 227static void 228acpi_acad_init_acline(void *arg) 229{ 230 struct acpi_acad_softc *sc; 231 device_t dev; 232 int retry; 233 234 dev = (device_t)arg; 235 sc = device_get_softc(dev); 236 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 237 "acline initialization start\n"); 238 239 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) { 240 acpi_acad_get_status(dev); 241 if (sc->status != -1) 242 break; 243 AcpiOsSleep(10000); 244 } 245 246 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 247 "acline initialization done, tried %d times\n", retry + 1); 248} 249 250/* 251 * If no AC line devices detected after boot, create an "online" event 252 * so that userland code can adjust power settings accordingly. The default 253 * power profile is "performance" so we don't need to repeat that here. 254 */ 255static void 256acpi_acad_ac_only(void __unused *arg) 257{ 258 259 if (devclass_get_count(acpi_acad_devclass) > 0) 260 return; 261 262 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1); 263} 264 265/* 266 * Public interfaces. 267 */ 268int 269acpi_acad_get_acline(int *status) 270{ 271 struct acpi_acad_softc *sc; 272 device_t dev; 273 274 dev = devclass_get_device(acpi_acad_devclass, 0); 275 if (dev == NULL) 276 return (ENXIO); 277 sc = device_get_softc(dev); 278 279 acpi_acad_get_status(dev); 280 *status = sc->status; 281 282 return (0); 283} 284