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 * $FreeBSD: src/sys/dev/acpica/acpi_acad.c,v 1.39 2009/06/05 18:44:36 jkim Exp 27 */ 28 29 #include "opt_acpi.h" 30 #include <sys/param.h> 31 #include <sys/kernel.h> 32 #include <sys/bus.h> 33 34 #include <sys/rman.h> 35 #include <sys/malloc.h> 36 #include <sys/module.h> 37 #include <sys/conf.h> 38 #include <sys/power.h> 39 40 #include "acpi.h" 41 42 #include <dev/acpica/acpivar.h> 43 #include <dev/acpica/acpiio.h> 44 #include <bus/isa/isavar.h> 45 #include <bus/isa/pnpvar.h> 46 47 /* Hooks for the ACPICA debugging infrastructure */ 48 #define _COMPONENT ACPI_AC_ADAPTER 49 ACPI_MODULE_NAME("AC_ADAPTER") 50 51 /* Number of times to retry initialization before giving up. */ 52 #define ACPI_ACAD_RETRY_MAX 6 53 54 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80 55 56 /* 57 * _CST changed. 58 * Also serves as notification code, when line is unplugged 59 * on certain laptops. 60 */ 61 #define ACPI_NOTIFY_CX_STATES 0x81 62 63 struct acpi_acad_softc { 64 int status; 65 }; 66 67 static void acpi_acad_get_status(void *); 68 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *); 69 static int acpi_acad_probe(device_t); 70 static int acpi_acad_attach(device_t); 71 static int acpi_acad_ioctl(u_long, caddr_t, void *); 72 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS); 73 static void acpi_acad_init_acline(void *arg); 74 static void acpi_acad_ac_only(void *arg); 75 76 static device_method_t acpi_acad_methods[] = { 77 /* Device interface */ 78 DEVMETHOD(device_probe, acpi_acad_probe), 79 DEVMETHOD(device_attach, acpi_acad_attach), 80 81 DEVMETHOD_END 82 }; 83 84 static driver_t acpi_acad_driver = { 85 "acpi_acad", 86 acpi_acad_methods, 87 sizeof(struct acpi_acad_softc), 88 }; 89 90 static devclass_t acpi_acad_devclass; 91 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, NULL, NULL); 92 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1); 93 94 ACPI_SERIAL_DECL(acad, "ACPI AC adapter"); 95 96 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL); 97 98 static void 99 acpi_acad_get_status(void *context) 100 { 101 struct acpi_acad_softc *sc; 102 device_t dev; 103 ACPI_HANDLE h; 104 int newstatus; 105 106 dev = context; 107 sc = device_get_softc(dev); 108 h = acpi_get_handle(dev); 109 newstatus = -1; 110 acpi_GetInteger(h, "_PSR", &newstatus); 111 112 /* If status is valid and has changed, notify the system. */ 113 ACPI_SERIAL_BEGIN(acad); 114 if (newstatus != -1 && sc->status != newstatus) { 115 sc->status = newstatus; 116 ACPI_SERIAL_END(acad); 117 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE : 118 POWER_PROFILE_ECONOMY); 119 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 120 "%s Line\n", newstatus ? "On" : "Off"); 121 acpi_UserNotify("ACAD", h, newstatus); 122 } else { 123 ACPI_SERIAL_END(acad); 124 } 125 } 126 127 static void 128 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 129 { 130 device_t dev; 131 132 dev = (device_t)context; 133 switch (notify) { 134 case ACPI_NOTIFY_BUS_CHECK: 135 case ACPI_NOTIFY_DEVICE_CHECK: 136 case ACPI_POWERSOURCE_STAT_CHANGE: 137 case ACPI_NOTIFY_CX_STATES: 138 /* Temporarily. It is better to notify policy manager */ 139 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context); 140 break; 141 default: 142 if (bootverbose) 143 device_printf(dev, "unknown notify %#x\n", notify); 144 break; 145 } 146 } 147 148 static int 149 acpi_acad_probe(device_t dev) 150 { 151 static char *acad_ids[] = { "ACPI0003", NULL }; 152 153 if (acpi_disabled("acad") || 154 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL) 155 return (ENXIO); 156 157 device_set_desc(dev, "AC Adapter"); 158 return (0); 159 } 160 161 static int 162 acpi_acad_attach(device_t dev) 163 { 164 struct acpi_acad_softc *sc; 165 struct acpi_softc *acpi_sc; 166 ACPI_HANDLE handle; 167 int error; 168 169 sc = device_get_softc(dev); 170 handle = acpi_get_handle(dev); 171 172 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev); 173 if (error != 0) 174 return (error); 175 176 ACPI_SERIAL_INIT(acad); 177 178 if (device_get_unit(dev) == 0) { 179 acpi_sc = acpi_device_get_parent_softc(dev); 180 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx, 181 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 182 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD, 183 &sc->status, 0, acpi_acad_sysctl, "I", ""); 184 } 185 186 /* Get initial status after whole system is up. */ 187 sc->status = -1; 188 189 /* 190 * Install both system and device notify handlers since the Casio 191 * FIVA needs them. 192 */ 193 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY, 194 acpi_acad_notify_handler, dev); 195 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev); 196 197 return (0); 198 } 199 200 static int 201 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg) 202 { 203 struct acpi_acad_softc *sc; 204 device_t dev; 205 206 dev = (device_t)arg; 207 sc = device_get_softc(dev); 208 209 /* 210 * No security check required: information retrieval only. If 211 * new functions are added here, a check might be required. 212 */ 213 switch (cmd) { 214 case ACPIIO_ACAD_GET_STATUS: 215 acpi_acad_get_status(dev); 216 *(int *)addr = sc->status; 217 break; 218 default: 219 break; 220 } 221 222 return (0); 223 } 224 225 static int 226 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS) 227 { 228 int val, error; 229 230 if (acpi_acad_get_acline(&val) != 0) 231 return (ENXIO); 232 233 val = *(u_int *)oidp->oid_arg1; 234 error = sysctl_handle_int(oidp, &val, 0, req); 235 return (error); 236 } 237 238 static void 239 acpi_acad_init_acline(void *arg) 240 { 241 struct acpi_acad_softc *sc; 242 device_t dev; 243 int retry; 244 245 dev = (device_t)arg; 246 sc = device_get_softc(dev); 247 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 248 "acline initialization start\n"); 249 250 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) { 251 acpi_acad_get_status(dev); 252 if (sc->status != -1) 253 break; 254 AcpiOsSleep(10000); 255 } 256 257 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 258 "acline initialization done, tried %d times\n", retry + 1); 259 } 260 261 /* 262 * If no AC line devices detected after boot, create an "online" event 263 * so that userland code can adjust power settings accordingly. The default 264 * power profile is "performance" so we don't need to repeat that here. 265 */ 266 static void 267 acpi_acad_ac_only(void __unused *arg) 268 { 269 270 if (devclass_get_count(acpi_acad_devclass) == 0) 271 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1); 272 } 273 274 /* 275 * Public interfaces. 276 */ 277 int 278 acpi_acad_get_acline(int *status) 279 { 280 struct acpi_acad_softc *sc; 281 device_t dev; 282 283 dev = devclass_get_device(acpi_acad_devclass, 0); 284 if (dev == NULL) 285 return (ENXIO); 286 sc = device_get_softc(dev); 287 288 acpi_acad_get_status(dev); 289 *status = sc->status; 290 291 return (0); 292 } 293