aps.c revision 1.3
1 /* $NetBSD: aps.c,v 1.3 2007/11/16 08:00:15 xtraeme Exp $ */ 2 /* $OpenBSD: aps.c,v 1.15 2007/05/19 19:14:11 tedu Exp $ */ 3 4 /* 5 * Copyright (c) 2005 Jonathan Gray <jsg (at) openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* 21 * A driver for the ThinkPad Active Protection System based on notes from 22 * http://www.almaden.ibm.com/cs/people/marksmith/tpaps.html 23 */ 24 25 #include <sys/cdefs.h> 26 __KERNEL_RCSID(0, "$NetBSD: aps.c,v 1.3 2007/11/16 08:00:15 xtraeme Exp $"); 27 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/device.h> 31 #include <sys/kernel.h> 32 #include <sys/callout.h> 33 34 #include <sys/bus.h> 35 36 #include <dev/sysmon/sysmonvar.h> 37 38 #include <dev/isa/isareg.h> 39 #include <dev/isa/isavar.h> 40 41 #if defined(APSDEBUG) 42 #define DPRINTF(x) do { printf x; } while (0) 43 #else 44 #define DPRINTF(x) 45 #endif 46 47 #define APS_ACCEL_STATE 0x04 48 #define APS_INIT 0x10 49 #define APS_STATE 0x11 50 #define APS_XACCEL 0x12 51 #define APS_YACCEL 0x14 52 #define APS_TEMP 0x16 53 #define APS_XVAR 0x17 54 #define APS_YVAR 0x19 55 #define APS_TEMP2 0x1b 56 #define APS_UNKNOWN 0x1c 57 #define APS_INPUT 0x1d 58 #define APS_CMD 0x1f 59 60 #define APS_STATE_NEWDATA 0x50 61 62 #define APS_CMD_START 0x01 63 64 #define APS_INPUT_KB (1 << 5) 65 #define APS_INPUT_MS (1 << 6) 66 #define APS_INPUT_LIDOPEN (1 << 7) 67 68 #define APS_ADDR_SIZE 0x1f 69 70 struct sensor_rec { 71 uint8_t state; 72 uint16_t x_accel; 73 uint16_t y_accel; 74 uint8_t temp1; 75 uint16_t x_var; 76 uint16_t y_var; 77 uint8_t temp2; 78 uint8_t unk; 79 uint8_t input; 80 }; 81 82 enum aps_sensors { 83 APS_SENSOR_XACCEL = 0, 84 APS_SENSOR_YACCEL, 85 APS_SENSOR_XVAR, 86 APS_SENSOR_YVAR, 87 APS_SENSOR_TEMP1, 88 APS_SENSOR_TEMP2, 89 APS_SENSOR_KBACT, 90 APS_SENSOR_MSACT, 91 APS_SENSOR_LIDOPEN, 92 APS_NUM_SENSORS 93 }; 94 95 struct aps_softc { 96 struct device sc_dev; 97 98 bus_space_tag_t sc_iot; 99 bus_space_handle_t sc_ioh; 100 101 struct sysmon_envsys *sc_sme; 102 envsys_data_t sc_sensor[APS_NUM_SENSORS]; 103 struct callout sc_callout; 104 105 struct sensor_rec aps_data; 106 void *sc_powerhook; 107 }; 108 109 static int aps_match(struct device *, struct cfdata *, void *); 110 static void aps_attach(struct device *, struct device *, void *); 111 static int aps_detach(struct device *, int); 112 113 static int aps_init(struct aps_softc *); 114 static uint8_t aps_mem_read_1(bus_space_tag_t, bus_space_handle_t, 115 int, uint8_t); 116 static void aps_refresh_sensor_data(struct aps_softc *sc); 117 static void aps_refresh(void *); 118 static void aps_power(int, void *); 119 120 CFATTACH_DECL(aps, sizeof(struct aps_softc), 121 aps_match, aps_attach, aps_detach, NULL); 122 123 int 124 aps_match(struct device *parent, struct cfdata *match, void *aux) 125 { 126 struct isa_attach_args *ia = aux; 127 bus_space_tag_t iot = ia->ia_iot; 128 bus_space_handle_t ioh; 129 int iobase, i; 130 uint8_t cr; 131 132 /* Must supply an address */ 133 if (ia->ia_nio < 1) 134 return 0; 135 136 if (ISA_DIRECT_CONFIG(ia)) 137 return 0; 138 139 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 140 return 0; 141 142 iobase = ia->ia_io[0].ir_addr; 143 144 if (bus_space_map(iot, iobase, APS_ADDR_SIZE, 0, &ioh)) { 145 aprint_error("aps: can't map i/o space\n"); 146 return 0; 147 } 148 149 /* See if this machine has APS */ 150 bus_space_write_1(iot, ioh, APS_INIT, 0x13); 151 bus_space_write_1(iot, ioh, APS_CMD, 0x01); 152 153 /* ask again as the X40 is slightly deaf in one ear */ 154 bus_space_read_1(iot, ioh, APS_CMD); 155 bus_space_write_1(iot, ioh, APS_INIT, 0x13); 156 bus_space_write_1(iot, ioh, APS_CMD, 0x01); 157 158 if (!aps_mem_read_1(iot, ioh, APS_CMD, 0x00)) { 159 bus_space_unmap(iot, ioh, APS_ADDR_SIZE); 160 return 0; 161 } 162 163 /* 164 * Observed values from Linux driver: 165 * 0x01: T42 166 * 0x02: chip already initialised 167 * 0x03: T41 168 */ 169 for (i = 0; i < 10; i++) { 170 cr = bus_space_read_1(iot, ioh, APS_STATE); 171 if (cr > 0 && cr < 6) 172 break; 173 delay(5 * 1000); 174 } 175 176 bus_space_unmap(iot, ioh, APS_ADDR_SIZE); 177 DPRINTF(("aps: state register 0x%x\n", cr)); 178 if (cr < 1 || cr > 5) { 179 DPRINTF(("aps0: unsupported state %d\n", cr)); 180 return 0; 181 } 182 183 ia->ia_nio = 1; 184 ia->ia_io[0].ir_size = APS_ADDR_SIZE; 185 ia->ia_niomem = 0; 186 ia->ia_nirq = 0; 187 ia->ia_ndrq = 0; 188 189 return 1; 190 } 191 192 void 193 aps_attach(struct device *parent, struct device *self, void *aux) 194 { 195 struct aps_softc *sc = (void *)self; 196 struct isa_attach_args *ia = aux; 197 int iobase, i; 198 199 sc->sc_iot = ia->ia_iot; 200 iobase = ia->ia_io[0].ir_addr; 201 202 if (bus_space_map(sc->sc_iot, iobase, APS_ADDR_SIZE, 0, &sc->sc_ioh)) { 203 aprint_error(": can't map i/o space\n"); 204 return; 205 } 206 207 aprint_naive("\n"); 208 aprint_normal("\n"); 209 210 if (!aps_init(sc)) { 211 aprint_error("%s: failed to initialise\n", 212 device_xname(&sc->sc_dev)); 213 return; 214 } 215 216 /* Initialize sensors */ 217 #define INITDATA(idx, unit, string) \ 218 sc->sc_sensor[idx].units = unit; \ 219 snprintf(sc->sc_sensor[idx].desc, sizeof(sc->sc_sensor[idx].desc), \ 220 "%s %s", sc->sc_dev.dv_xname, string); 221 222 INITDATA(APS_SENSOR_XACCEL, ENVSYS_INTEGER, "X_ACCEL"); 223 INITDATA(APS_SENSOR_YACCEL, ENVSYS_INTEGER, "Y_ACCEL"); 224 INITDATA(APS_SENSOR_TEMP1, ENVSYS_STEMP, "TEMP_1"); 225 INITDATA(APS_SENSOR_TEMP2, ENVSYS_STEMP, "TEMP_2"); 226 INITDATA(APS_SENSOR_XVAR, ENVSYS_INTEGER, "X_VAR"); 227 INITDATA(APS_SENSOR_YVAR, ENVSYS_INTEGER, "Y_VAR"); 228 INITDATA(APS_SENSOR_KBACT, ENVSYS_INDICATOR, "Keyboard Active"); 229 INITDATA(APS_SENSOR_MSACT, ENVSYS_INDICATOR, "Mouse Active"); 230 INITDATA(APS_SENSOR_LIDOPEN, ENVSYS_INDICATOR, "Lid Open"); 231 232 sc->sc_sme = sysmon_envsys_create(); 233 for (i = 0; i < APS_NUM_SENSORS; i++) { 234 if (sysmon_envsys_sensor_attach(sc->sc_sme, 235 &sc->sc_sensor[i])) { 236 sysmon_envsys_destroy(sc->sc_sme); 237 return; 238 } 239 } 240 /* 241 * Register with the sysmon_envsys(9) framework. 242 */ 243 sc->sc_sme->sme_name = sc->sc_dev.dv_xname; 244 sc->sc_sme->sme_flags |= SME_DISABLE_REFRESH; 245 246 if ((i = sysmon_envsys_register(sc->sc_sme))) { 247 aprint_error("%s: unable to register with sysmon (%d)\n", 248 device_xname(&sc->sc_dev), i); 249 sysmon_envsys_destroy(sc->sc_sme); 250 return; 251 } 252 253 sc->sc_powerhook = powerhook_establish(sc->sc_dev.dv_xname, 254 aps_power, 255 sc); 256 if (sc->sc_powerhook == NULL) 257 aprint_error("%s: can't establish powerhook\n", 258 device_xname(&sc->sc_dev)); 259 260 /* Refresh sensor data every 0.5 seconds */ 261 callout_init(&sc->sc_callout, 0); 262 callout_setfunc(&sc->sc_callout, aps_refresh, sc); 263 callout_schedule(&sc->sc_callout, (hz) / 2); 264 265 aprint_normal("%s: Thinkpad Active Protection System\n", 266 device_xname(&sc->sc_dev)); 267 } 268 269 static int 270 aps_init(struct aps_softc *sc) 271 { 272 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x17); 273 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x81); 274 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 275 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00)) 276 return 0; 277 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x00)) 278 return 0; 279 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL, 0x60)) 280 return 0; 281 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL + 1, 0x00)) 282 return 0; 283 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x14); 284 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x01); 285 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 286 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00)) 287 return 0; 288 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x10); 289 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0xc8); 290 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL, 0x00); 291 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL + 1, 0x02); 292 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 293 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00)) 294 return 0; 295 /* refresh data */ 296 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x11); 297 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 298 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_ACCEL_STATE, 0x50)) 299 return 0; 300 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x00)) 301 return 0; 302 303 return 1; 304 } 305 306 static int 307 aps_detach(struct device *self, int flags) 308 { 309 struct aps_softc *sc = device_private(self); 310 311 callout_stop(&sc->sc_callout); 312 callout_destroy(&sc->sc_callout); 313 sysmon_envsys_unregister(sc->sc_sme); 314 bus_space_unmap(sc->sc_iot, sc->sc_ioh, APS_ADDR_SIZE); 315 316 return 0; 317 } 318 319 static uint8_t 320 aps_mem_read_1(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, 321 uint8_t val) 322 { 323 int i; 324 uint8_t cr; 325 /* should take no longer than 50 microseconds */ 326 for (i = 0; i < 10; i++) { 327 cr = bus_space_read_1(iot, ioh, reg); 328 if (cr == val) 329 return 1; 330 delay(5 * 1000); 331 } 332 333 DPRINTF(("aps: reg 0x%x not val 0x%x!\n", reg, val)); 334 return 0; 335 } 336 337 static void 338 aps_refresh_sensor_data(struct aps_softc *sc) 339 { 340 int64_t temp; 341 342 /* ask for new data */ 343 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x11); 344 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 345 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_ACCEL_STATE, 0x50)) 346 return; 347 348 sc->aps_data.state = 349 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_STATE); 350 sc->aps_data.x_accel = 351 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_XACCEL); 352 sc->aps_data.y_accel = 353 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_YACCEL); 354 sc->aps_data.temp1 = 355 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_TEMP); 356 sc->aps_data.x_var = 357 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_XVAR); 358 sc->aps_data.y_var = 359 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_YVAR); 360 sc->aps_data.temp2 = 361 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_TEMP2); 362 sc->aps_data.input = 363 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_INPUT); 364 365 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x11); 366 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 367 368 /* tell accelerometer we're done reading from it */ 369 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD); 370 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_ACCEL_STATE); 371 372 sc->sc_sensor[APS_SENSOR_XACCEL].value_cur = sc->aps_data.x_accel; 373 sc->sc_sensor[APS_SENSOR_YACCEL].value_cur = sc->aps_data.y_accel; 374 375 /* convert to micro (mu) degrees */ 376 temp = sc->aps_data.temp1 * 1000000; 377 /* convert to kelvin */ 378 temp += 273150000; 379 sc->sc_sensor[APS_SENSOR_TEMP1].value_cur = temp; 380 381 /* convert to micro (mu) degrees */ 382 temp = sc->aps_data.temp2 * 1000000; 383 /* convert to kelvin */ 384 temp += 273150000; 385 sc->sc_sensor[APS_SENSOR_TEMP2].value_cur = temp; 386 387 sc->sc_sensor[APS_SENSOR_XVAR].value_cur = sc->aps_data.x_var; 388 sc->sc_sensor[APS_SENSOR_YVAR].value_cur = sc->aps_data.y_var; 389 sc->sc_sensor[APS_SENSOR_KBACT].value_cur = 390 (sc->aps_data.input & APS_INPUT_KB) ? 1 : 0; 391 sc->sc_sensor[APS_SENSOR_MSACT].value_cur = 392 (sc->aps_data.input & APS_INPUT_MS) ? 1 : 0; 393 sc->sc_sensor[APS_SENSOR_LIDOPEN].value_cur = 394 (sc->aps_data.input & APS_INPUT_LIDOPEN) ? 1 : 0; 395 } 396 397 static void 398 aps_refresh(void *arg) 399 { 400 struct aps_softc *sc = (struct aps_softc *)arg; 401 402 aps_refresh_sensor_data(sc); 403 callout_schedule(&sc->sc_callout, (hz) / 2); 404 } 405 406 static void 407 aps_power(int why, void *arg) 408 { 409 struct aps_softc *sc = (struct aps_softc *)arg; 410 411 if (why != PWR_RESUME) { 412 callout_stop(&sc->sc_callout); 413 } else { 414 /* 415 * Redo the init sequence on resume, because APS is 416 * as forgetful as it is deaf. 417 */ 418 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x13); 419 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 420 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD); 421 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x13); 422 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 423 424 if (aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00) && 425 aps_init(sc)) 426 callout_schedule(&sc->sc_callout, (hz) / 2); 427 else 428 printf("aps: failed to wake up\n"); 429 } 430 } 431
Indexes created Thu Sep 25 02:09:54 GMT 2025