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 device_printf(dev, "unknown notify: %#x\n", notify); 143 break; 144 } 145 } 146 147 static int 148 acpi_acad_probe(device_t dev) 149 { 150 static char *acad_ids[] = { "ACPI0003", NULL }; 151 152 if (acpi_disabled("acad") || 153 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL) 154 return (ENXIO); 155 156 device_set_desc(dev, "AC Adapter"); 157 return (0); 158 } 159 160 static int 161 acpi_acad_attach(device_t dev) 162 { 163 struct acpi_acad_softc *sc; 164 struct acpi_softc *acpi_sc; 165 ACPI_HANDLE handle; 166 int error; 167 168 sc = device_get_softc(dev); 169 handle = acpi_get_handle(dev); 170 171 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev); 172 if (error != 0) 173 return (error); 174 175 ACPI_SERIAL_INIT(acad); 176 177 if (device_get_unit(dev) == 0) { 178 acpi_sc = acpi_device_get_parent_softc(dev); 179 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx, 180 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 181 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD, 182 &sc->status, 0, acpi_acad_sysctl, "I", ""); 183 } 184 185 /* Get initial status after whole system is up. */ 186 sc->status = -1; 187 188 /* 189 * Install both system and device notify handlers since the Casio 190 * FIVA needs them. 191 */ 192 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY, 193 acpi_acad_notify_handler, dev); 194 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev); 195 196 return (0); 197 } 198 199 static int 200 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg) 201 { 202 struct acpi_acad_softc *sc; 203 device_t dev; 204 205 dev = (device_t)arg; 206 sc = device_get_softc(dev); 207 208 /* 209 * No security check required: information retrieval only. If 210 * new functions are added here, a check might be required. 211 */ 212 switch (cmd) { 213 case ACPIIO_ACAD_GET_STATUS: 214 acpi_acad_get_status(dev); 215 *(int *)addr = sc->status; 216 break; 217 default: 218 break; 219 } 220 221 return (0); 222 } 223 224 static int 225 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS) 226 { 227 int val, error; 228 229 if (acpi_acad_get_acline(&val) != 0) 230 return (ENXIO); 231 232 val = *(u_int *)oidp->oid_arg1; 233 error = sysctl_handle_int(oidp, &val, 0, req); 234 return (error); 235 } 236 237 static void 238 acpi_acad_init_acline(void *arg) 239 { 240 struct acpi_acad_softc *sc; 241 device_t dev; 242 int retry; 243 244 dev = (device_t)arg; 245 sc = device_get_softc(dev); 246 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 247 "acline initialization start\n"); 248 249 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) { 250 acpi_acad_get_status(dev); 251 if (sc->status != -1) 252 break; 253 AcpiOsSleep(10000); 254 } 255 256 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 257 "acline initialization done, tried %d times\n", retry + 1); 258 } 259 260 /* 261 * If no AC line devices detected after boot, create an "online" event 262 * so that userland code can adjust power settings accordingly. The default 263 * power profile is "performance" so we don't need to repeat that here. 264 */ 265 static void 266 acpi_acad_ac_only(void __unused *arg) 267 { 268 269 if (devclass_get_count(acpi_acad_devclass) == 0) 270 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1); 271 } 272 273 /* 274 * Public interfaces. 275 */ 276 int 277 acpi_acad_get_acline(int *status) 278 { 279 struct acpi_acad_softc *sc; 280 device_t dev; 281 282 dev = devclass_get_device(acpi_acad_devclass, 0); 283 if (dev == NULL) 284 return (ENXIO); 285 sc = device_get_softc(dev); 286 287 acpi_acad_get_status(dev); 288 *status = sc->status; 289 290 return (0); 291 } 292