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