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 struct acpi_acad_softc { 57 int status; 58 }; 59 60 static void acpi_acad_get_status(void *); 61 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *); 62 static int acpi_acad_probe(device_t); 63 static int acpi_acad_attach(device_t); 64 static int acpi_acad_ioctl(u_long, caddr_t, void *); 65 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS); 66 static void acpi_acad_init_acline(void *arg); 67 static void acpi_acad_ac_only(void *arg); 68 69 static device_method_t acpi_acad_methods[] = { 70 /* Device interface */ 71 DEVMETHOD(device_probe, acpi_acad_probe), 72 DEVMETHOD(device_attach, acpi_acad_attach), 73 74 DEVMETHOD_END 75 }; 76 77 static driver_t acpi_acad_driver = { 78 "acpi_acad", 79 acpi_acad_methods, 80 sizeof(struct acpi_acad_softc), 81 }; 82 83 static devclass_t acpi_acad_devclass; 84 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, NULL, NULL); 85 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1); 86 87 ACPI_SERIAL_DECL(acad, "ACPI AC adapter"); 88 89 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL); 90 91 static void 92 acpi_acad_get_status(void *context) 93 { 94 struct acpi_acad_softc *sc; 95 device_t dev; 96 ACPI_HANDLE h; 97 int newstatus; 98 99 dev = context; 100 sc = device_get_softc(dev); 101 h = acpi_get_handle(dev); 102 newstatus = -1; 103 acpi_GetInteger(h, "_PSR", &newstatus); 104 105 /* If status is valid and has changed, notify the system. */ 106 ACPI_SERIAL_BEGIN(acad); 107 if (newstatus != -1 && sc->status != newstatus) { 108 sc->status = newstatus; 109 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE : 110 POWER_PROFILE_ECONOMY); 111 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 112 "%s Line\n", newstatus ? "On" : "Off"); 113 acpi_UserNotify("ACAD", h, newstatus); 114 } 115 ACPI_SERIAL_END(acad); 116 } 117 118 static void 119 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 120 { 121 device_t dev; 122 123 dev = (device_t)context; 124 switch (notify) { 125 case ACPI_NOTIFY_BUS_CHECK: 126 case ACPI_NOTIFY_DEVICE_CHECK: 127 case ACPI_POWERSOURCE_STAT_CHANGE: 128 /* Temporarily. It is better to notify policy manager */ 129 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context); 130 break; 131 default: 132 device_printf(dev, "unknown notify %#x\n", notify); 133 break; 134 } 135 } 136 137 static int 138 acpi_acad_probe(device_t dev) 139 { 140 static char *acad_ids[] = { "ACPI0003", NULL }; 141 142 if (acpi_disabled("acad") || 143 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL) 144 return (ENXIO); 145 146 device_set_desc(dev, "AC Adapter"); 147 return (0); 148 } 149 150 static int 151 acpi_acad_attach(device_t dev) 152 { 153 struct acpi_acad_softc *sc; 154 struct acpi_softc *acpi_sc; 155 ACPI_HANDLE handle; 156 int error; 157 158 sc = device_get_softc(dev); 159 handle = acpi_get_handle(dev); 160 161 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev); 162 if (error != 0) 163 return (error); 164 165 ACPI_SERIAL_INIT(acad); 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 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev); 185 186 return (0); 187 } 188 189 static int 190 acpi_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 } 213 214 static int 215 acpi_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 } 226 227 static void 228 acpi_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 */ 255 static void 256 acpi_acad_ac_only(void __unused *arg) 257 { 258 259 if (devclass_get_count(acpi_acad_devclass) == 0) 260 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1); 261 } 262 263 /* 264 * Public interfaces. 265 */ 266 int 267 acpi_acad_get_acline(int *status) 268 { 269 struct acpi_acad_softc *sc; 270 device_t dev; 271 272 dev = devclass_get_device(acpi_acad_devclass, 0); 273 if (dev == NULL) 274 return (ENXIO); 275 sc = device_get_softc(dev); 276 277 acpi_acad_get_status(dev); 278 *status = sc->status; 279 280 return (0); 281 } 282