aps.c revision 1.4
1 /* $NetBSD: aps.c,v 1.4 2007/11/17 08:30:35 kefren 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 1.4 2007/11/17 08:30:35 kefren 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 sc->sc_sensor[i].state = ENVSYS_SVALID; 235 if (sysmon_envsys_sensor_attach(sc->sc_sme, 236 &sc->sc_sensor[i])) { 237 sysmon_envsys_destroy(sc->sc_sme); 238 return; 239 } 240 } 241 /* 242 * Register with the sysmon_envsys(9) framework. 243 */ 244 sc->sc_sme->sme_name = sc->sc_dev.dv_xname; 245 sc->sc_sme->sme_flags |= SME_DISABLE_REFRESH; 246 247 if ((i = sysmon_envsys_register(sc->sc_sme))) { 248 aprint_error("%s: unable to register with sysmon (%d)\n", 249 device_xname(&sc->sc_dev), i); 250 sysmon_envsys_destroy(sc->sc_sme); 251 return; 252 } 253 254 sc->sc_powerhook = powerhook_establish(sc->sc_dev.dv_xname, 255 aps_power, 256 sc); 257 if (sc->sc_powerhook == NULL) 258 aprint_error("%s: can't establish powerhook\n", 259 device_xname(&sc->sc_dev)); 260 261 /* Refresh sensor data every 0.5 seconds */ 262 callout_init(&sc->sc_callout, 0); 263 callout_setfunc(&sc->sc_callout, aps_refresh, sc); 264 callout_schedule(&sc->sc_callout, (hz) / 2); 265 266 aprint_normal("%s: Thinkpad Active Protection System\n", 267 device_xname(&sc->sc_dev)); 268 } 269 270 static int 271 aps_init(struct aps_softc *sc) 272 { 273 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x17); 274 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x81); 275 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 276 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00)) 277 return 0; 278 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x00)) 279 return 0; 280 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL, 0x60)) 281 return 0; 282 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL + 1, 0x00)) 283 return 0; 284 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x14); 285 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x01); 286 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 287 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00)) 288 return 0; 289 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x10); 290 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0xc8); 291 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL, 0x00); 292 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_XACCEL + 1, 0x02); 293 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 294 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00)) 295 return 0; 296 /* refresh data */ 297 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x11); 298 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 299 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_ACCEL_STATE, 0x50)) 300 return 0; 301 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_STATE, 0x00)) 302 return 0; 303 304 return 1; 305 } 306 307 static int 308 aps_detach(struct device *self, int flags) 309 { 310 struct aps_softc *sc = device_private(self); 311 312 callout_stop(&sc->sc_callout); 313 callout_destroy(&sc->sc_callout); 314 sysmon_envsys_unregister(sc->sc_sme); 315 bus_space_unmap(sc->sc_iot, sc->sc_ioh, APS_ADDR_SIZE); 316 317 return 0; 318 } 319 320 static uint8_t 321 aps_mem_read_1(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, 322 uint8_t val) 323 { 324 int i; 325 uint8_t cr; 326 /* should take no longer than 50 microseconds */ 327 for (i = 0; i < 10; i++) { 328 cr = bus_space_read_1(iot, ioh, reg); 329 if (cr == val) 330 return 1; 331 delay(5 * 1000); 332 } 333 334 DPRINTF(("aps: reg 0x%x not val 0x%x!\n", reg, val)); 335 return 0; 336 } 337 338 static void 339 aps_refresh_sensor_data(struct aps_softc *sc) 340 { 341 int64_t temp; 342 343 /* ask for new data */ 344 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x11); 345 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 346 if (!aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_ACCEL_STATE, 0x50)) 347 return; 348 349 sc->aps_data.state = 350 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_STATE); 351 sc->aps_data.x_accel = 352 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_XACCEL); 353 sc->aps_data.y_accel = 354 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_YACCEL); 355 sc->aps_data.temp1 = 356 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_TEMP); 357 sc->aps_data.x_var = 358 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_XVAR); 359 sc->aps_data.y_var = 360 bus_space_read_2(sc->sc_iot, sc->sc_ioh, APS_YVAR); 361 sc->aps_data.temp2 = 362 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_TEMP2); 363 sc->aps_data.input = 364 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_INPUT); 365 366 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x11); 367 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 368 369 /* tell accelerometer we're done reading from it */ 370 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD); 371 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_ACCEL_STATE); 372 373 sc->sc_sensor[APS_SENSOR_XACCEL].value_cur = sc->aps_data.x_accel; 374 sc->sc_sensor[APS_SENSOR_YACCEL].value_cur = sc->aps_data.y_accel; 375 376 /* convert to micro (mu) degrees */ 377 temp = sc->aps_data.temp1 * 1000000; 378 /* convert to kelvin */ 379 temp += 273150000; 380 sc->sc_sensor[APS_SENSOR_TEMP1].value_cur = temp; 381 382 /* convert to micro (mu) degrees */ 383 temp = sc->aps_data.temp2 * 1000000; 384 /* convert to kelvin */ 385 temp += 273150000; 386 sc->sc_sensor[APS_SENSOR_TEMP2].value_cur = temp; 387 388 sc->sc_sensor[APS_SENSOR_XVAR].value_cur = sc->aps_data.x_var; 389 sc->sc_sensor[APS_SENSOR_YVAR].value_cur = sc->aps_data.y_var; 390 sc->sc_sensor[APS_SENSOR_KBACT].value_cur = 391 (sc->aps_data.input & APS_INPUT_KB) ? 1 : 0; 392 sc->sc_sensor[APS_SENSOR_MSACT].value_cur = 393 (sc->aps_data.input & APS_INPUT_MS) ? 1 : 0; 394 sc->sc_sensor[APS_SENSOR_LIDOPEN].value_cur = 395 (sc->aps_data.input & APS_INPUT_LIDOPEN) ? 1 : 0; 396 } 397 398 static void 399 aps_refresh(void *arg) 400 { 401 struct aps_softc *sc = (struct aps_softc *)arg; 402 403 aps_refresh_sensor_data(sc); 404 callout_schedule(&sc->sc_callout, (hz) / 2); 405 } 406 407 static void 408 aps_power(int why, void *arg) 409 { 410 struct aps_softc *sc = (struct aps_softc *)arg; 411 412 if (why != PWR_RESUME) { 413 callout_stop(&sc->sc_callout); 414 } else { 415 /* 416 * Redo the init sequence on resume, because APS is 417 * as forgetful as it is deaf. 418 */ 419 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x13); 420 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 421 bus_space_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD); 422 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_INIT, 0x13); 423 bus_space_write_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x01); 424 425 if (aps_mem_read_1(sc->sc_iot, sc->sc_ioh, APS_CMD, 0x00) && 426 aps_init(sc)) 427 callout_schedule(&sc->sc_callout, (hz) / 2); 428 else 429 printf("aps: failed to wake up\n"); 430 } 431 } 432
Indexes created Wed Sep 24 05:09:52 GMT 2025