tda.c revision 1.10
1 /* $NetBSD: tda.c,v 1.10 2015/04/27 11:55:29 martin Exp $ */ 2 /* $OpenBSD: tda.c,v 1.4 2008/02/27 17:25:00 robert Exp $ */ 3 4 /* 5 * Copyright (c) 2008 Robert Nagy <robert (at) openbsd.org> 6 * Copyright (c) 2008 Mark Kettenis <kettenis (at) openbsd.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/cdefs.h> 22 __KERNEL_RCSID(0, "$NetBSD: tda.c,v 1.10 2015/04/27 11:55:29 martin Exp $"); 23 24 #include <sys/param.h> 25 #include <sys/systm.h> 26 #include <sys/kernel.h> 27 #include <sys/device.h> 28 #include <dev/sysmon/sysmonvar.h> 29 #include <dev/sysmon/sysmon_taskq.h> 30 31 #include <machine/autoconf.h> 32 #include <machine/openfirm.h> 33 34 #include <dev/i2c/i2cvar.h> 35 36 /* fan control registers */ 37 #define TDA_SYSFAN_REG 0xf0 38 #define TDA_CPUFAN_REG 0xf2 39 #define TDA_PSFAN_REG 0xf4 40 41 #define TDA_FANSPEED_MIN 0x0c 42 #define TDA_FANSPEED_MAX 0x3f 43 44 #define TDA_PSFAN_ON 0x1f 45 #define TDA_PSFAN_OFF 0x00 46 47 /* Internal and External temperature sensor numbers */ 48 #define SENSOR_TEMP_EXT 0 49 #define SENSOR_TEMP_INT 1 50 51 /* Fan sensor numbers */ 52 #define SENSOR_FAN_CPU 0 53 #define SENSOR_FAN_SYS 1 54 55 #define CPU_TEMP_MAX (67 * 1000000 + 273150000) 56 #define CPU_TEMP_MIN (57 * 1000000 + 273150000) 57 #define SYS_TEMP_MAX (30 * 1000000 + 273150000) 58 #define SYS_TEMP_MIN (20 * 1000000 + 273150000) 59 60 struct tda_softc { 61 device_t sc_dev; 62 i2c_tag_t sc_tag; 63 i2c_addr_t sc_addr; 64 65 u_int16_t sc_cfan_speed; /* current CPU fan speed */ 66 u_int16_t sc_sfan_speed; /* current SYS fan speed */ 67 68 struct sysmon_envsys *sc_sme; 69 envsys_data_t sc_sensor[2]; 70 71 callout_t sc_timer; 72 }; 73 74 int tda_match(device_t, cfdata_t, void *); 75 void tda_attach(device_t, device_t, void *); 76 static int tda_detach(device_t, int); 77 void tda_refresh(struct sysmon_envsys *, envsys_data_t *); 78 79 void tda_setspeed(struct tda_softc *); 80 static void tda_adjust(void *); 81 static void tda_timeout(void *); 82 83 84 CFATTACH_DECL3_NEW(tda, sizeof(struct tda_softc), 85 tda_match, tda_attach, tda_detach, NULL, NULL, NULL, 86 DVF_DETACH_SHUTDOWN); 87 88 int 89 tda_match(device_t parent, cfdata_t match, void *aux) 90 { 91 struct i2c_attach_args *ia = aux; 92 93 /* Only attach on the Sun Blade 1000/2000. */ 94 if (strcmp(machine_model, "SUNW,Sun-Blade-1000") != 0) 95 return (0); 96 97 /* 98 * No need for "compatible" matching, we know exactly what 99 * firmware calls us. 100 */ 101 if (ia->ia_name == NULL) 102 return(0); 103 return strcmp(ia->ia_name, "fan-control") == 0; 104 } 105 106 void 107 tda_attach(device_t parent, device_t self, void *aux) 108 { 109 struct tda_softc *sc = device_private(self); 110 struct i2c_attach_args *ia = aux; 111 int rc; 112 113 sc->sc_dev = self; 114 sc->sc_tag = ia->ia_tag; 115 sc->sc_addr = ia->ia_addr; 116 117 aprint_normal(": %s\n", ia->ia_name); 118 aprint_naive(": Environment sensor\n"); 119 120 /* 121 * Set the fans to maximum speed and save the power levels; 122 * the controller is write-only. 123 */ 124 sc->sc_cfan_speed = sc->sc_sfan_speed = (TDA_FANSPEED_MAX+TDA_FANSPEED_MIN)/2; 125 tda_setspeed(sc); 126 127 callout_init(&sc->sc_timer, CALLOUT_MPSAFE); 128 callout_reset(&sc->sc_timer, hz*20, tda_timeout, sc); 129 130 /* Initialise sensor data */ 131 sc->sc_sensor[SENSOR_FAN_CPU].state = ENVSYS_SINVALID; 132 sc->sc_sensor[SENSOR_FAN_CPU].units = ENVSYS_INTEGER; 133 sc->sc_sensor[SENSOR_FAN_CPU].flags = ENVSYS_FMONNOTSUPP; 134 strlcpy(sc->sc_sensor[SENSOR_FAN_CPU].desc, 135 "fan.cpu",sizeof("fan.cpu")); 136 sc->sc_sensor[SENSOR_FAN_SYS].state = ENVSYS_SINVALID; 137 sc->sc_sensor[SENSOR_FAN_SYS].units = ENVSYS_INTEGER; 138 sc->sc_sensor[SENSOR_FAN_SYS].flags = ENVSYS_FMONNOTSUPP; 139 strlcpy(sc->sc_sensor[SENSOR_FAN_SYS].desc, 140 "fan.sys",sizeof("fan.sys")); 141 sc->sc_sme = sysmon_envsys_create(); 142 rc = sysmon_envsys_sensor_attach( 143 sc->sc_sme, &sc->sc_sensor[SENSOR_FAN_CPU]); 144 if (rc) { 145 sysmon_envsys_destroy(sc->sc_sme); 146 aprint_error_dev(self, 147 "unable to attach cpu fan at sysmon, error %d\n", rc); 148 return; 149 } 150 rc = sysmon_envsys_sensor_attach( 151 sc->sc_sme, &sc->sc_sensor[SENSOR_FAN_SYS]); 152 if (rc) { 153 sysmon_envsys_destroy(sc->sc_sme); 154 aprint_error_dev(self, 155 "unable to attach sys fan at sysmon, error %d\n", rc); 156 return; 157 } 158 sc->sc_sme->sme_name = device_xname(self); 159 sc->sc_sme->sme_cookie = sc; 160 sc->sc_sme->sme_refresh = tda_refresh; 161 rc = sysmon_envsys_register(sc->sc_sme); 162 if (rc) { 163 aprint_error_dev(self, 164 "unable to register with sysmon, error %d\n", rc); 165 sysmon_envsys_destroy(sc->sc_sme); 166 return; 167 } 168 } 169 170 int 171 tda_detach(device_t self, int flags) 172 { 173 struct tda_softc *sc = device_private(self); 174 175 if (sc->sc_sme != NULL) 176 sysmon_envsys_destroy(sc->sc_sme); 177 178 callout_halt(&sc->sc_timer, NULL); 179 callout_destroy(&sc->sc_timer); 180 181 sc->sc_cfan_speed = sc->sc_sfan_speed = TDA_FANSPEED_MAX; 182 tda_setspeed(sc); 183 return 0; 184 } 185 186 static void 187 tda_timeout(void *v) 188 { 189 struct tda_softc *sc = v; 190 191 sysmon_task_queue_sched(0, tda_adjust, sc); 192 callout_reset(&sc->sc_timer, hz*60, tda_timeout, sc); 193 } 194 195 void 196 tda_setspeed(struct tda_softc *sc) 197 { 198 u_int8_t cmd[2]; 199 200 if (sc->sc_cfan_speed < TDA_FANSPEED_MIN) 201 sc->sc_cfan_speed = TDA_FANSPEED_MIN; 202 if (sc->sc_sfan_speed < TDA_FANSPEED_MIN) 203 sc->sc_sfan_speed = TDA_FANSPEED_MIN; 204 if (sc->sc_cfan_speed > TDA_FANSPEED_MAX) 205 sc->sc_cfan_speed = TDA_FANSPEED_MAX; 206 if (sc->sc_sfan_speed > TDA_FANSPEED_MAX) 207 sc->sc_sfan_speed = TDA_FANSPEED_MAX; 208 209 iic_acquire_bus(sc->sc_tag, 0); 210 211 cmd[0] = TDA_CPUFAN_REG; 212 cmd[1] = sc->sc_cfan_speed; 213 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 214 sc->sc_addr, &cmd, sizeof(cmd), NULL, 0, 0)) { 215 aprint_error_dev(sc->sc_dev, "cannot write cpu-fan register\n"); 216 iic_release_bus(sc->sc_tag, 0); 217 return; 218 } 219 220 cmd[0] = TDA_SYSFAN_REG; 221 cmd[1] = sc->sc_sfan_speed; 222 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 223 sc->sc_addr, &cmd, sizeof(cmd), NULL, 0, 0)) { 224 aprint_error_dev(sc->sc_dev, "cannot write system-fan register\n"); 225 iic_release_bus(sc->sc_tag, 0); 226 return; 227 } 228 229 iic_release_bus(sc->sc_tag, 0); 230 231 aprint_debug_dev(sc->sc_dev, "changed fan speed to cpu=%d system=%d\n", 232 sc->sc_cfan_speed, sc->sc_sfan_speed); 233 } 234 235 static bool 236 is_cpu_sensor(const envsys_data_t *edata) 237 { 238 if (edata->units != ENVSYS_STEMP) 239 return false; 240 return strcmp(edata->desc, "external") == 0; 241 } 242 243 static bool 244 is_system_sensor(const envsys_data_t *edata) 245 { 246 if (edata->units != ENVSYS_STEMP) 247 return false; 248 return strcmp(edata->desc, "internal") == 0; 249 } 250 251 static void 252 tda_adjust(void *v) 253 { 254 struct tda_softc *sc = v; 255 u_int64_t ctemp, stemp; 256 u_int16_t cspeed, sspeed; 257 258 /* Default to running the fans at maximum speed. */ 259 sspeed = cspeed = TDA_FANSPEED_MAX; 260 261 /* fetch maximum current temperature */ 262 ctemp = sysmon_envsys_get_max_value(is_cpu_sensor, true); 263 stemp = sysmon_envsys_get_max_value(is_system_sensor, true); 264 265 /* the predicates for selecting sensors must have gone wrong */ 266 if (ctemp == 0 || stemp == 0) { 267 aprint_error_dev(sc->sc_dev, "skipping temp adjustment" 268 " - no sensor values\n"); 269 return; 270 } 271 272 aprint_debug_dev(sc->sc_dev, "current temperature: cpu %" PRIu64 273 " system %" PRIu64 "\n", 274 ctemp, stemp); 275 276 if (ctemp < CPU_TEMP_MIN) 277 cspeed = TDA_FANSPEED_MIN; 278 else if (ctemp < CPU_TEMP_MAX) 279 cspeed = TDA_FANSPEED_MIN + 280 (ctemp - CPU_TEMP_MIN) * 281 (TDA_FANSPEED_MAX - TDA_FANSPEED_MIN) / 282 (CPU_TEMP_MAX - CPU_TEMP_MIN); 283 284 if (stemp < SYS_TEMP_MIN) 285 sspeed = TDA_FANSPEED_MIN; 286 else if (stemp < SYS_TEMP_MAX) 287 sspeed = TDA_FANSPEED_MIN + 288 (stemp - SYS_TEMP_MIN) * 289 (TDA_FANSPEED_MAX - TDA_FANSPEED_MIN) / 290 (SYS_TEMP_MAX - SYS_TEMP_MIN); 291 292 if (sspeed == sc->sc_sfan_speed && cspeed == sc->sc_cfan_speed) 293 return; 294 295 sc->sc_sfan_speed = sspeed; 296 sc->sc_cfan_speed = cspeed; 297 tda_setspeed(sc); 298 } 299 300 void 301 tda_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 302 { 303 struct tda_softc *sc = sme->sme_cookie; 304 u_int16_t speed; 305 306 if (edata->sensor == SENSOR_FAN_CPU) 307 speed = sc->sc_cfan_speed; 308 else 309 speed = sc->sc_sfan_speed; 310 if (!speed) 311 edata->state = ENVSYS_SINVALID; 312 else { 313 edata->value_cur = speed; 314 edata->state = ENVSYS_SVALID; 315 } 316 } 317 318
Indexes created Sat Sep 27 14:09:57 GMT 2025