tda.c revision 1.5.2.3
1 /* $NetBSD: tda.c,v 1.5.2.3 2014/08/20 00:03:25 tls 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 1.5.2.3 2014/08/20 00:03:25 tls 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; 111 112 sc->sc_dev = self; 113 sc->sc_tag = ia->ia_tag; 114 sc->sc_addr = ia->ia_addr; 115 116 aprint_normal(": %s\n", ia->ia_name); 117 aprint_naive(": Environment sensor\n"); 118 119 /* 120 * Set the fans to maximum speed and save the power levels; 121 * the controller is write-only. 122 */ 123 sc->sc_cfan_speed = sc->sc_sfan_speed = (TDA_FANSPEED_MAX+TDA_FANSPEED_MIN)/2; 124 tda_setspeed(sc); 125 126 callout_init(&sc->sc_timer, CALLOUT_MPSAFE); 127 callout_reset(&sc->sc_timer, hz*20, tda_timeout, sc); 128 129 /* Initialise sensor data */ 130 sc->sc_sensor[SENSOR_FAN_CPU].state = ENVSYS_SINVALID; 131 sc->sc_sensor[SENSOR_FAN_CPU].units = ENVSYS_INTEGER; 132 sc->sc_sensor[SENSOR_FAN_CPU].flags = ENVSYS_FMONNOTSUPP; 133 strlcpy(sc->sc_sensor[SENSOR_FAN_CPU].desc, 134 "fan.cpu",sizeof("fan.cpu")); 135 sc->sc_sensor[SENSOR_FAN_SYS].state = ENVSYS_SINVALID; 136 sc->sc_sensor[SENSOR_FAN_SYS].units = ENVSYS_INTEGER; 137 sc->sc_sensor[SENSOR_FAN_SYS].flags = ENVSYS_FMONNOTSUPP; 138 strlcpy(sc->sc_sensor[SENSOR_FAN_SYS].desc, 139 "fan.sys",sizeof("fan.sys")); 140 sc->sc_sme = sysmon_envsys_create(); 141 if (sysmon_envsys_sensor_attach( 142 sc->sc_sme, &sc->sc_sensor[SENSOR_FAN_CPU])) { 143 sysmon_envsys_destroy(sc->sc_sme); 144 aprint_error_dev(self, 145 "unable to attach cpu fan at sysmon\n"); 146 return; 147 } 148 if (sysmon_envsys_sensor_attach( 149 sc->sc_sme, &sc->sc_sensor[SENSOR_FAN_SYS])) { 150 sysmon_envsys_destroy(sc->sc_sme); 151 aprint_error_dev(self, 152 "unable to attach sys fan at sysmon\n"); 153 return; 154 } 155 sc->sc_sme->sme_name = device_xname(self); 156 sc->sc_sme->sme_cookie = sc; 157 sc->sc_sme->sme_refresh = tda_refresh; 158 if (sysmon_envsys_register(sc->sc_sme)) { 159 aprint_error_dev(self, 160 "unable to register with sysmon\n"); 161 sysmon_envsys_destroy(sc->sc_sme); 162 return; 163 } 164 } 165 166 int 167 tda_detach(device_t self, int flags) 168 { 169 struct tda_softc *sc = device_private(self); 170 171 if (sc->sc_sme != NULL) 172 sysmon_envsys_destroy(sc->sc_sme); 173 174 callout_halt(&sc->sc_timer, NULL); 175 callout_destroy(&sc->sc_timer); 176 177 sc->sc_cfan_speed = sc->sc_sfan_speed = TDA_FANSPEED_MAX; 178 tda_setspeed(sc); 179 return 0; 180 } 181 182 static void 183 tda_timeout(void *v) 184 { 185 struct tda_softc *sc = v; 186 187 sysmon_task_queue_sched(0, tda_adjust, sc); 188 callout_reset(&sc->sc_timer, hz*60, tda_timeout, sc); 189 } 190 191 void 192 tda_setspeed(struct tda_softc *sc) 193 { 194 u_int8_t cmd[2]; 195 196 if (sc->sc_cfan_speed < TDA_FANSPEED_MIN) 197 sc->sc_cfan_speed = TDA_FANSPEED_MIN; 198 if (sc->sc_sfan_speed < TDA_FANSPEED_MIN) 199 sc->sc_sfan_speed = TDA_FANSPEED_MIN; 200 if (sc->sc_cfan_speed > TDA_FANSPEED_MAX) 201 sc->sc_cfan_speed = TDA_FANSPEED_MAX; 202 if (sc->sc_sfan_speed > TDA_FANSPEED_MAX) 203 sc->sc_sfan_speed = TDA_FANSPEED_MAX; 204 205 iic_acquire_bus(sc->sc_tag, 0); 206 207 cmd[0] = TDA_CPUFAN_REG; 208 cmd[1] = sc->sc_cfan_speed; 209 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 210 sc->sc_addr, &cmd, sizeof(cmd), NULL, 0, 0)) { 211 aprint_error_dev(sc->sc_dev, "cannot write cpu-fan register\n"); 212 iic_release_bus(sc->sc_tag, 0); 213 return; 214 } 215 216 cmd[0] = TDA_SYSFAN_REG; 217 cmd[1] = sc->sc_sfan_speed; 218 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, 219 sc->sc_addr, &cmd, sizeof(cmd), NULL, 0, 0)) { 220 aprint_error_dev(sc->sc_dev, "cannot write system-fan register\n"); 221 iic_release_bus(sc->sc_tag, 0); 222 return; 223 } 224 225 iic_release_bus(sc->sc_tag, 0); 226 227 aprint_debug_dev(sc->sc_dev, "changed fan speed to cpu=%d system=%d\n", 228 sc->sc_cfan_speed, sc->sc_sfan_speed); 229 } 230 231 static bool 232 is_cpu_sensor(const envsys_data_t *edata) 233 { 234 if (edata->units != ENVSYS_STEMP) 235 return false; 236 return strcmp(edata->desc, "external") == 0; 237 } 238 239 static bool 240 is_system_sensor(const envsys_data_t *edata) 241 { 242 if (edata->units != ENVSYS_STEMP) 243 return false; 244 return strcmp(edata->desc, "internal") == 0; 245 } 246 247 static void 248 tda_adjust(void *v) 249 { 250 struct tda_softc *sc = v; 251 u_int64_t ctemp, stemp; 252 u_int16_t cspeed, sspeed; 253 254 /* Default to running the fans at maximum speed. */ 255 sspeed = cspeed = TDA_FANSPEED_MAX; 256 257 /* fetch maximum current temperature */ 258 ctemp = sysmon_envsys_get_max_value(is_cpu_sensor, true); 259 stemp = sysmon_envsys_get_max_value(is_system_sensor, true); 260 261 /* the predicates for selecting sensors must have gone wrong */ 262 if (ctemp == 0 || stemp == 0) { 263 aprint_error_dev(sc->sc_dev, "skipping temp adjustment" 264 " - no sensor values\n"); 265 return; 266 } 267 268 aprint_debug_dev(sc->sc_dev, "current temperature: cpu %" PRIu64 269 " system %" PRIu64 "\n", 270 ctemp, stemp); 271 272 if (ctemp < CPU_TEMP_MIN) 273 cspeed = TDA_FANSPEED_MIN; 274 else if (ctemp < CPU_TEMP_MAX) 275 cspeed = TDA_FANSPEED_MIN + 276 (ctemp - CPU_TEMP_MIN) * 277 (TDA_FANSPEED_MAX - TDA_FANSPEED_MIN) / 278 (CPU_TEMP_MAX - CPU_TEMP_MIN); 279 280 if (stemp < SYS_TEMP_MIN) 281 sspeed = TDA_FANSPEED_MIN; 282 else if (stemp < SYS_TEMP_MAX) 283 sspeed = TDA_FANSPEED_MIN + 284 (stemp - SYS_TEMP_MIN) * 285 (TDA_FANSPEED_MAX - TDA_FANSPEED_MIN) / 286 (SYS_TEMP_MAX - SYS_TEMP_MIN); 287 288 if (sspeed == sc->sc_sfan_speed && cspeed == sc->sc_cfan_speed) 289 return; 290 291 sc->sc_sfan_speed = sspeed; 292 sc->sc_cfan_speed = cspeed; 293 tda_setspeed(sc); 294 } 295 296 void 297 tda_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 298 { 299 struct tda_softc *sc = sme->sme_cookie; 300 u_int16_t speed; 301 302 if (edata->sensor == SENSOR_FAN_CPU) 303 speed = sc->sc_cfan_speed; 304 else 305 speed = sc->sc_sfan_speed; 306 if (!speed) 307 edata->state = ENVSYS_SINVALID; 308 else { 309 edata->value_cur = speed; 310 edata->state = ENVSYS_SVALID; 311 } 312 } 313 314
Indexes created Thu Oct 02 10:09:58 GMT 2025