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 * $FreeBSD$ 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 <machine/bus.h> 35 #include <machine/resource.h> 36 #include <sys/rman.h> 37 #include <sys/ioccom.h> 38 #include <sys/malloc.h> 39 #include <sys/conf.h> 40 #include <sys/power.h> 41 42 #include "acpi.h" 43 #include <dev/acpica/acpivar.h> 44 #include <dev/acpica/acpiio.h> 45 46 /* Hooks for the ACPI CA debugging infrastructure */ 47 #define _COMPONENT ACPI_AC_ADAPTER 48 ACPI_MODULE_NAME("AC_ADAPTER") 49 50 /* Number of times to retry initialization before giving up. */ 51 #define ACPI_ACAD_RETRY_MAX 6 52 53 #define ACPI_DEVICE_CHECK_PNP 0x00 54 #define ACPI_DEVICE_CHECK_EXISTENCE 0x01 55 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80 56 57 struct acpi_acad_softc { 58 int status; 59 int initializing; 60 }; 61 62 static void acpi_acad_get_status(void *); 63 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *); 64 static int acpi_acad_probe(device_t); 65 static int acpi_acad_attach(device_t); 66 static int acpi_acad_ioctl(u_long, caddr_t, void *); 67 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS); 68 static void acpi_acad_init_acline(void *arg); 69 70 static device_method_t acpi_acad_methods[] = { 71 /* Device interface */ 72 DEVMETHOD(device_probe, acpi_acad_probe), 73 DEVMETHOD(device_attach, acpi_acad_attach), 74 75 {0, 0} 76 }; 77 78 static driver_t acpi_acad_driver = { 79 "acpi_acad", 80 acpi_acad_methods, 81 sizeof(struct acpi_acad_softc), 82 }; 83 84 static devclass_t acpi_acad_devclass; 85 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0); 86 87 static void 88 acpi_acad_get_status(void *context) 89 { 90 struct acpi_acad_softc *sc; 91 device_t dev; 92 ACPI_HANDLE h; 93 int newstatus; 94 95 dev = context; 96 sc = device_get_softc(dev); 97 h = acpi_get_handle(dev); 98 if (ACPI_FAILURE(acpi_EvaluateInteger(h, "_PSR", &newstatus))) { 99 sc->status = -1; 100 return; 101 } 102 103 if (sc->status != newstatus) { 104 sc->status = newstatus; 105 106 /* Set system power profile based on AC adapter status */ 107 power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE : 108 POWER_PROFILE_ECONOMY); 109 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 110 "%s Line\n", sc->status ? "On" : "Off"); 111 } 112 } 113 114 static void 115 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 116 { 117 device_t dev = context; 118 119 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 120 "Notify 0x%x\n", notify); 121 122 switch (notify) { 123 case ACPI_DEVICE_CHECK_PNP: 124 case ACPI_DEVICE_CHECK_EXISTENCE: 125 case ACPI_POWERSOURCE_STAT_CHANGE: 126 /* Temporarily. It is better to notify policy manager */ 127 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context); 128 break; 129 default: 130 break; 131 } 132 } 133 134 static int 135 acpi_acad_probe(device_t dev) 136 { 137 if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && 138 acpi_MatchHid(dev, "ACPI0003")) { 139 140 device_set_desc(dev, "AC adapter"); 141 return (0); 142 } 143 return (ENXIO); 144 } 145 146 static int 147 acpi_acad_attach(device_t dev) 148 { 149 struct acpi_acad_softc *sc; 150 struct acpi_softc *acpi_sc; 151 ACPI_HANDLE handle; 152 int error; 153 154 sc = device_get_softc(dev); 155 if (sc == NULL) 156 return (ENXIO); 157 handle = acpi_get_handle(dev); 158 159 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev); 160 if (error != 0) 161 return (error); 162 163 if (device_get_unit(dev) == 0) { 164 acpi_sc = acpi_device_get_parent_softc(dev); 165 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx, 166 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 167 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD, 168 &sc->status, 0, acpi_acad_sysctl, "I", ""); 169 } 170 171 /* Get initial status after whole system is up. */ 172 sc->status = -1; 173 sc->initializing = 0; 174 175 /* 176 * Also install a system notify handler even though this is not 177 * required by the specification. The Casio FIVA needs this. 178 */ 179 AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY, 180 acpi_acad_notify_handler, dev); 181 AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY, 182 acpi_acad_notify_handler, dev); 183 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev); 184 185 return (0); 186 } 187 188 static int 189 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg) 190 { 191 struct acpi_acad_softc *sc; 192 device_t dev; 193 194 dev = (device_t)arg; 195 sc = device_get_softc(dev); 196 if (sc == NULL) 197 return (ENXIO); 198 199 /* 200 * No security check required: information retrieval only. If 201 * new functions are added here, a check might be required. 202 */ 203 switch (cmd) { 204 case ACPIIO_ACAD_GET_STATUS: 205 acpi_acad_get_status(dev); 206 *(int *)addr = sc->status; 207 break; 208 default: 209 break; 210 } 211 212 return (0); 213 } 214 215 static int 216 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS) 217 { 218 int val, error; 219 220 if (acpi_acad_get_acline(&val) != 0) 221 return (ENXIO); 222 223 val = *(u_int *)oidp->oid_arg1; 224 error = sysctl_handle_int(oidp, &val, 0, req); 225 return (error); 226 } 227 228 static void 229 acpi_acad_init_acline(void *arg) 230 { 231 struct acpi_acad_softc *sc; 232 device_t dev; 233 int retry, status; 234 235 dev = (device_t)arg; 236 sc = device_get_softc(dev); 237 if (sc->initializing) 238 return; 239 240 sc->initializing = 1; 241 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 242 "acline initialization start\n"); 243 244 status = 0; 245 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) { 246 acpi_acad_get_status(dev); 247 if (status != sc->status) 248 break; 249 AcpiOsSleep(10, 0); 250 } 251 252 sc->initializing = 0; 253 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev), 254 "acline initialization done, tried %d times\n", retry + 1); 255 } 256 257 /* 258 * Public interfaces. 259 */ 260 int 261 acpi_acad_get_acline(int *status) 262 { 263 struct acpi_acad_softc *sc; 264 device_t dev; 265 266 dev = devclass_get_device(acpi_acad_devclass, 0); 267 if (dev == NULL) 268 return (ENXIO); 269 sc = device_get_softc(dev); 270 if (sc == NULL) 271 return (ENXIO); 272 273 acpi_acad_get_status(dev); 274 *status = sc->status; 275 276 return (0); 277 } 278