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 ACPI CA 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 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE : 117 POWER_PROFILE_ECONOMY); 118 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 119 "%s Line\n", newstatus ? "On" : "Off"); 120 acpi_UserNotify("ACAD", h, newstatus); 121 } 122 ACPI_SERIAL_END(acad); 123 } 124 125 static void 126 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 127 { 128 device_t dev; 129 130 dev = (device_t)context; 131 switch (notify) { 132 case ACPI_NOTIFY_BUS_CHECK: 133 case ACPI_NOTIFY_DEVICE_CHECK: 134 case ACPI_POWERSOURCE_STAT_CHANGE: 135 case ACPI_NOTIFY_CX_STATES: 136 /* Temporarily. It is better to notify policy manager */ 137 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context); 138 break; 139 default: 140 if (bootverbose) 141 device_printf(dev, "unknown notify %#x\n", notify); 142 break; 143 } 144 } 145 146 static int 147 acpi_acad_probe(device_t dev) 148 { 149 static char *acad_ids[] = { "ACPI0003", NULL }; 150 151 if (acpi_disabled("acad") || 152 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL) 153 return (ENXIO); 154 155 device_set_desc(dev, "AC Adapter"); 156 return (0); 157 } 158 159 static int 160 acpi_acad_attach(device_t dev) 161 { 162 struct acpi_acad_softc *sc; 163 struct acpi_softc *acpi_sc; 164 ACPI_HANDLE handle; 165 int error; 166 167 sc = device_get_softc(dev); 168 handle = acpi_get_handle(dev); 169 170 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev); 171 if (error != 0) 172 return (error); 173 174 ACPI_SERIAL_INIT(acad); 175 176 if (device_get_unit(dev) == 0) { 177 acpi_sc = acpi_device_get_parent_softc(dev); 178 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx, 179 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 180 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD, 181 &sc->status, 0, acpi_acad_sysctl, "I", ""); 182 } 183 184 /* Get initial status after whole system is up. */ 185 sc->status = -1; 186 187 /* 188 * Install both system and device notify handlers since the Casio 189 * FIVA needs them. 190 */ 191 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY, 192 acpi_acad_notify_handler, dev); 193 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev); 194 195 return (0); 196 } 197 198 static int 199 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg) 200 { 201 struct acpi_acad_softc *sc; 202 device_t dev; 203 204 dev = (device_t)arg; 205 sc = device_get_softc(dev); 206 207 /* 208 * No security check required: information retrieval only. If 209 * new functions are added here, a check might be required. 210 */ 211 switch (cmd) { 212 case ACPIIO_ACAD_GET_STATUS: 213 acpi_acad_get_status(dev); 214 *(int *)addr = sc->status; 215 break; 216 default: 217 break; 218 } 219 220 return (0); 221 } 222 223 static int 224 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS) 225 { 226 int val, error; 227 228 if (acpi_acad_get_acline(&val) != 0) 229 return (ENXIO); 230 231 val = *(u_int *)oidp->oid_arg1; 232 error = sysctl_handle_int(oidp, &val, 0, req); 233 return (error); 234 } 235 236 static void 237 acpi_acad_init_acline(void *arg) 238 { 239 struct acpi_acad_softc *sc; 240 device_t dev; 241 int retry; 242 243 dev = (device_t)arg; 244 sc = device_get_softc(dev); 245 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 246 "acline initialization start\n"); 247 248 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) { 249 acpi_acad_get_status(dev); 250 if (sc->status != -1) 251 break; 252 AcpiOsSleep(10000); 253 } 254 255 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 256 "acline initialization done, tried %d times\n", retry + 1); 257 } 258 259 /* 260 * If no AC line devices detected after boot, create an "online" event 261 * so that userland code can adjust power settings accordingly. The default 262 * power profile is "performance" so we don't need to repeat that here. 263 */ 264 static void 265 acpi_acad_ac_only(void __unused *arg) 266 { 267 268 if (devclass_get_count(acpi_acad_devclass) == 0) 269 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1); 270 } 271 272 /* 273 * Public interfaces. 274 */ 275 int 276 acpi_acad_get_acline(int *status) 277 { 278 struct acpi_acad_softc *sc; 279 device_t dev; 280 281 dev = devclass_get_device(acpi_acad_devclass, 0); 282 if (dev == NULL) 283 return (ENXIO); 284 sc = device_get_softc(dev); 285 286 acpi_acad_get_status(dev); 287 *status = sc->status; 288 289 return (0); 290 } 291