smsc.c revision 1.2.2.2
1 1.2.2.2 mjf /* $NetBSD: smsc.c,v 1.2.2.2 2007/07/11 20:06:31 mjf Exp $ */ 2 1.2.2.2 mjf 3 1.2.2.2 mjf /*- 4 1.2.2.2 mjf * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 1.2.2.2 mjf * All rights reserved. 6 1.2.2.2 mjf * 7 1.2.2.2 mjf * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 mjf * by Brett Lymn. 9 1.2.2.2 mjf * 10 1.2.2.2 mjf * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 mjf * modification, are permitted provided that the following conditions 12 1.2.2.2 mjf * are met: 13 1.2.2.2 mjf * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 mjf * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 mjf * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 mjf * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 mjf * documentation and/or other materials provided with the distribution. 18 1.2.2.2 mjf * 3. All advertising materials mentioning features or use of this software 19 1.2.2.2 mjf * must display the following acknowledgement: 20 1.2.2.2 mjf * This product includes software developed by the NetBSD 21 1.2.2.2 mjf * Foundation, Inc. and its contributors. 22 1.2.2.2 mjf * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2.2.2 mjf * contributors may be used to endorse or promote products derived 24 1.2.2.2 mjf * from this software without specific prior written permission. 25 1.2.2.2 mjf * 26 1.2.2.2 mjf * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2.2.2 mjf * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2.2.2 mjf * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2.2.2 mjf * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2.2.2 mjf * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2.2.2 mjf * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2.2.2 mjf * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2.2.2 mjf * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2.2.2 mjf * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2.2.2 mjf * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2.2.2 mjf * POSSIBILITY OF SUCH DAMAGE. 37 1.2.2.2 mjf */ 38 1.2.2.2 mjf 39 1.2.2.2 mjf /* 40 1.2.2.2 mjf * This is a driver for the Standard Microsystems Corp (SMSC) 41 1.2.2.2 mjf * LPC47B397 "super i/o" chip. This driver only handles the environment 42 1.2.2.2 mjf * monitoring capabilities of the chip, the other functions will be 43 1.2.2.2 mjf * probed/matched as "normal" PC hardware devices (serial ports, fdc, so on). 44 1.2.2.2 mjf * SMSC has not deigned to release a datasheet for this particular chip 45 1.2.2.2 mjf * (though they do for others they make) so this driver was written from 46 1.2.2.2 mjf * information contained in the comment block for the Linux driver. 47 1.2.2.2 mjf */ 48 1.2.2.2 mjf 49 1.2.2.2 mjf #include <sys/cdefs.h> 50 1.2.2.2 mjf __KERNEL_RCSID(0, "$NetBSD: smsc.c,v 1.2.2.2 2007/07/11 20:06:31 mjf Exp $"); 51 1.2.2.2 mjf 52 1.2.2.2 mjf #include <sys/param.h> 53 1.2.2.2 mjf #include <sys/systm.h> 54 1.2.2.2 mjf #include <sys/kernel.h> 55 1.2.2.2 mjf #include <sys/malloc.h> 56 1.2.2.2 mjf #include <sys/proc.h> 57 1.2.2.2 mjf #include <sys/device.h> 58 1.2.2.2 mjf #include <sys/conf.h> 59 1.2.2.2 mjf #include <sys/time.h> 60 1.2.2.2 mjf 61 1.2.2.2 mjf #include <machine/bus.h> 62 1.2.2.2 mjf 63 1.2.2.2 mjf #include <dev/isa/isareg.h> 64 1.2.2.2 mjf #include <dev/isa/isavar.h> 65 1.2.2.2 mjf 66 1.2.2.2 mjf #include <dev/sysmon/sysmonvar.h> 67 1.2.2.2 mjf 68 1.2.2.2 mjf #include <dev/isa/smscvar.h> 69 1.2.2.2 mjf 70 1.2.2.2 mjf #include <machine/intr.h> 71 1.2.2.2 mjf 72 1.2.2.2 mjf #if defined(LMDEBUG) 73 1.2.2.2 mjf #define DPRINTF(x) do { printf x; } while (0) 74 1.2.2.2 mjf #else 75 1.2.2.2 mjf #define DPRINTF(x) 76 1.2.2.2 mjf #endif 77 1.2.2.2 mjf 78 1.2.2.2 mjf int smsc_probe(struct device *, struct cfdata *, void *); 79 1.2.2.2 mjf void smsc_attach(struct device *, struct device *, void *); 80 1.2.2.2 mjf static uint8_t smsc_readreg(struct smsc_softc *, int); 81 1.2.2.2 mjf /*static void smsc_writereg(struct smsc_softc *, int, int);*/ 82 1.2.2.2 mjf void smsc_setup(struct smsc_softc *); 83 1.2.2.2 mjf 84 1.2.2.2 mjf static int smsc_gtredata(struct sysmon_envsys *, envsys_data_t *); 85 1.2.2.2 mjf 86 1.2.2.2 mjf CFATTACH_DECL(smsc, sizeof(struct smsc_softc), 87 1.2.2.2 mjf smsc_probe, smsc_attach, NULL, NULL); 88 1.2.2.2 mjf 89 1.2.2.2 mjf struct smsc_sysmon { 90 1.2.2.2 mjf struct sysmon_envsys sme; 91 1.2.2.2 mjf struct smsc_softc *sc; 92 1.2.2.2 mjf envsys_data_t smsc_sensor[]; 93 1.2.2.2 mjf }; 94 1.2.2.2 mjf 95 1.2.2.2 mjf /* 96 1.2.2.2 mjf * Probe for the SMSC Super I/O chip 97 1.2.2.2 mjf */ 98 1.2.2.2 mjf int 99 1.2.2.2 mjf smsc_probe(struct device *parent, struct cfdata *match, void *aux) 100 1.2.2.2 mjf { 101 1.2.2.2 mjf bus_space_handle_t ioh; 102 1.2.2.2 mjf struct isa_attach_args *ia = aux; 103 1.2.2.2 mjf int rv; 104 1.2.2.2 mjf uint8_t cr; 105 1.2.2.2 mjf 106 1.2.2.2 mjf /* Must supply an address */ 107 1.2.2.2 mjf if (ia->ia_nio < 1) 108 1.2.2.2 mjf return 0; 109 1.2.2.2 mjf 110 1.2.2.2 mjf if (ISA_DIRECT_CONFIG(ia)) 111 1.2.2.2 mjf return 0; 112 1.2.2.2 mjf 113 1.2.2.2 mjf if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 114 1.2.2.2 mjf return 0; 115 1.2.2.2 mjf 116 1.2.2.2 mjf if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh)) 117 1.2.2.2 mjf return 0; 118 1.2.2.2 mjf 119 1.2.2.2 mjf /* To get the device ID we must enter config mode... */ 120 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_START); 121 1.2.2.2 mjf 122 1.2.2.2 mjf /* Then select the device id register */ 123 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_DEVICE_ID); 124 1.2.2.2 mjf 125 1.2.2.2 mjf /* Finally, read the id from the chip */ 126 1.2.2.2 mjf cr = bus_space_read_1(ia->ia_iot, ioh, SMSC_DATA); 127 1.2.2.2 mjf 128 1.2.2.2 mjf /* Exit config mode, apparently this is important to do */ 129 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_END); 130 1.2.2.2 mjf 131 1.2.2.2 mjf if (cr == SMSC_ID) 132 1.2.2.2 mjf rv = 1; 133 1.2.2.2 mjf else 134 1.2.2.2 mjf rv = 0; 135 1.2.2.2 mjf 136 1.2.2.2 mjf DPRINTF(("smsc: rv = %d, cr = %x\n", rv, cr)); 137 1.2.2.2 mjf 138 1.2.2.2 mjf bus_space_unmap(ia->ia_iot, ioh, 2); 139 1.2.2.2 mjf 140 1.2.2.2 mjf if (rv) { 141 1.2.2.2 mjf ia->ia_nio = 1; 142 1.2.2.2 mjf ia->ia_io[0].ir_size = 2; 143 1.2.2.2 mjf 144 1.2.2.2 mjf ia->ia_niomem = 0; 145 1.2.2.2 mjf ia->ia_nirq = 0; 146 1.2.2.2 mjf ia->ia_ndrq = 0; 147 1.2.2.2 mjf } 148 1.2.2.2 mjf 149 1.2.2.2 mjf return rv; 150 1.2.2.2 mjf } 151 1.2.2.2 mjf 152 1.2.2.2 mjf /* 153 1.2.2.2 mjf * Get the base address for the monitoring registers and set up the 154 1.2.2.2 mjf * env sysmon framework. 155 1.2.2.2 mjf */ 156 1.2.2.2 mjf void 157 1.2.2.2 mjf smsc_attach(struct device *parent, struct device *self, void *aux) 158 1.2.2.2 mjf { 159 1.2.2.2 mjf struct smsc_softc *smsc_sc = (void *)self; 160 1.2.2.2 mjf struct isa_attach_args *ia = aux; 161 1.2.2.2 mjf bus_space_handle_t ioh; 162 1.2.2.2 mjf uint8_t rev, msb, lsb; 163 1.2.2.2 mjf unsigned address; 164 1.2.2.2 mjf 165 1.2.2.2 mjf smsc_sc->smsc_iot = ia->ia_iot; 166 1.2.2.2 mjf 167 1.2.2.2 mjf /* To attach we need to find the actual i/o register space, 168 1.2.2.2 mjf map the base registers in first. */ 169 1.2.2.2 mjf if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, 170 1.2.2.2 mjf &ioh)) { 171 1.2.2.2 mjf aprint_error(": can't map base i/o space\n"); 172 1.2.2.2 mjf return; 173 1.2.2.2 mjf } 174 1.2.2.2 mjf 175 1.2.2.2 mjf /* Enter config mode. */ 176 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_START); 177 1.2.2.2 mjf 178 1.2.2.2 mjf /* While we have the base registers mapped, grab the chip revision */ 179 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_DEVICE_REVISION); 180 1.2.2.2 mjf rev = bus_space_read_1(ia->ia_iot, ioh, SMSC_DATA); 181 1.2.2.2 mjf 182 1.2.2.2 mjf /* Select the correct logical device */ 183 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_LOGICAL_DEV_SEL); 184 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_DATA, SMSC_LOGICAL_DEVICE); 185 1.2.2.2 mjf 186 1.2.2.2 mjf /* Read the base address for the registers. */ 187 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_IO_BASE_MSB); 188 1.2.2.2 mjf msb = bus_space_read_1(ia->ia_iot, ioh, SMSC_DATA); 189 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_IO_BASE_LSB); 190 1.2.2.2 mjf lsb = bus_space_read_1(ia->ia_iot, ioh, SMSC_DATA); 191 1.2.2.2 mjf address = (msb << 8) | lsb; 192 1.2.2.2 mjf 193 1.2.2.2 mjf /* Exit config mode */ 194 1.2.2.2 mjf bus_space_write_1(ia->ia_iot, ioh, SMSC_ADDR, SMSC_CONFIG_END); 195 1.2.2.2 mjf 196 1.2.2.2 mjf bus_space_unmap(ia->ia_iot, ioh, 2); 197 1.2.2.2 mjf 198 1.2.2.2 mjf /* Map the i/o space for the registers. */ 199 1.2.2.2 mjf if (bus_space_map(ia->ia_iot, address, 2, 0, &smsc_sc->smsc_ioh)) { 200 1.2.2.2 mjf aprint_error(": can't map register i/o space\n"); 201 1.2.2.2 mjf return; 202 1.2.2.2 mjf } 203 1.2.2.2 mjf 204 1.2.2.2 mjf aprint_normal(": monitor registers at 0x%04x (rev. %u)\n", 205 1.2.2.2 mjf address, rev); 206 1.2.2.2 mjf 207 1.2.2.2 mjf smsc_setup(smsc_sc); 208 1.2.2.2 mjf } 209 1.2.2.2 mjf 210 1.2.2.2 mjf 211 1.2.2.2 mjf /* 212 1.2.2.2 mjf * Read the value of the given register 213 1.2.2.2 mjf */ 214 1.2.2.2 mjf static uint8_t 215 1.2.2.2 mjf smsc_readreg(struct smsc_softc *sc, int reg) 216 1.2.2.2 mjf { 217 1.2.2.2 mjf bus_space_write_1(sc->smsc_iot, sc->smsc_ioh, SMSC_ADDR, reg); 218 1.2.2.2 mjf return bus_space_read_1(sc->smsc_iot, sc->smsc_ioh, SMSC_DATA); 219 1.2.2.2 mjf } 220 1.2.2.2 mjf 221 1.2.2.2 mjf 222 1.2.2.2 mjf /* 223 1.2.2.2 mjf * Write the given value to the given register - here just for completeness 224 1.2.2.2 mjf * it is unused in the current code. 225 1.2.2.2 mjf 226 1.2.2.2 mjf static void 227 1.2.2.2 mjf smsc_writereg (struct smsc_softc *sc, int reg, int val) 228 1.2.2.2 mjf { 229 1.2.2.2 mjf bus_space_write_1(sc->smsc_iot, sc->smsc_ioh, SMSC_ADDR, reg); 230 1.2.2.2 mjf bus_space_write_1(sc->smsc_iot, sc->smsc_ioh, SMSC_DATA, val); 231 1.2.2.2 mjf } */ 232 1.2.2.2 mjf 233 1.2.2.2 mjf /* convert temperature read from the chip to micro kelvin */ 234 1.2.2.2 mjf static inline int 235 1.2.2.2 mjf smsc_temp2muk(uint8_t t) 236 1.2.2.2 mjf { 237 1.2.2.2 mjf int temp=t; 238 1.2.2.2 mjf 239 1.2.2.2 mjf return temp * 1000000 + 273150000U; 240 1.2.2.2 mjf } 241 1.2.2.2 mjf 242 1.2.2.2 mjf /* 243 1.2.2.2 mjf * convert register value read from chip into rpm using: 244 1.2.2.2 mjf * 245 1.2.2.2 mjf * RPM = 60/(Count * 11.111us) 246 1.2.2.2 mjf * 247 1.2.2.2 mjf * 1/1.1111us = 90kHz 248 1.2.2.2 mjf * 249 1.2.2.2 mjf */ 250 1.2.2.2 mjf static inline int 251 1.2.2.2 mjf smsc_reg2rpm(unsigned int r) 252 1.2.2.2 mjf { 253 1.2.2.2 mjf unsigned long rpm; 254 1.2.2.2 mjf 255 1.2.2.2 mjf if (r == 0x0) 256 1.2.2.2 mjf return 0; 257 1.2.2.2 mjf 258 1.2.2.2 mjf rpm = (90000 * 60) / ((unsigned long) r); 259 1.2.2.2 mjf return (int) rpm; 260 1.2.2.2 mjf } 261 1.2.2.2 mjf 262 1.2.2.2 mjf /* min and max temperatures in uK */ 263 1.2.2.2 mjf #define SMSC_MIN_TEMP_UK ((-127 * 1000000) + 273150000) 264 1.2.2.2 mjf #define SMSC_MAX_TEMP_UK ((127 * 1000000) + 273150000) 265 1.2.2.2 mjf 266 1.2.2.2 mjf /* 267 1.2.2.2 mjf * Set up the environment monitoring framework for all the devices 268 1.2.2.2 mjf * that we monitor. 269 1.2.2.2 mjf */ 270 1.2.2.2 mjf void 271 1.2.2.2 mjf smsc_setup(struct smsc_softc *sc) 272 1.2.2.2 mjf { 273 1.2.2.2 mjf struct smsc_sysmon *datap; 274 1.2.2.2 mjf int error, i; 275 1.2.2.2 mjf char label[8]; 276 1.2.2.2 mjf envsys_data_t *edata; 277 1.2.2.2 mjf 278 1.2.2.2 mjf datap = malloc(sizeof(struct sysmon_envsys) + SMSC_MAX_SENSORS * 279 1.2.2.2 mjf sizeof(envsys_data_t) + sizeof(void *), 280 1.2.2.2 mjf M_DEVBUF, M_WAITOK | M_ZERO); 281 1.2.2.2 mjf 282 1.2.2.2 mjf for (i = 0; i < 4; i++) { 283 1.2.2.2 mjf edata = &datap->smsc_sensor[i]; 284 1.2.2.2 mjf sprintf(label, "Temp-%d", i + 1); 285 1.2.2.2 mjf strlcpy(edata->desc, label, sizeof(edata->desc)); 286 1.2.2.2 mjf edata->units = ENVSYS_STEMP; 287 1.2.2.2 mjf edata->sensor = i; 288 1.2.2.2 mjf edata->state = ENVSYS_SVALID; 289 1.2.2.2 mjf switch (i) { 290 1.2.2.2 mjf case 0: 291 1.2.2.2 mjf sc->regs[i] = SMSC_TEMP1; 292 1.2.2.2 mjf break; 293 1.2.2.2 mjf 294 1.2.2.2 mjf case 1: 295 1.2.2.2 mjf sc->regs[i] = SMSC_TEMP2; 296 1.2.2.2 mjf break; 297 1.2.2.2 mjf 298 1.2.2.2 mjf case 2: 299 1.2.2.2 mjf sc->regs[i] = SMSC_TEMP3; 300 1.2.2.2 mjf break; 301 1.2.2.2 mjf 302 1.2.2.2 mjf case 3: 303 1.2.2.2 mjf sc->regs[i] = SMSC_TEMP4; 304 1.2.2.2 mjf break; 305 1.2.2.2 mjf } 306 1.2.2.2 mjf 307 1.2.2.2 mjf } 308 1.2.2.2 mjf 309 1.2.2.2 mjf for (i = 4; i < SMSC_MAX_SENSORS; i++) { 310 1.2.2.2 mjf edata = &datap->smsc_sensor[i]; 311 1.2.2.2 mjf sprintf(label, "Fan-%d", i - 3); 312 1.2.2.2 mjf strlcpy(edata->desc, label, sizeof(edata->desc)); 313 1.2.2.2 mjf edata->units = ENVSYS_SFANRPM; 314 1.2.2.2 mjf edata->sensor = i; 315 1.2.2.2 mjf edata->units = ENVSYS_SFANRPM; 316 1.2.2.2 mjf edata->state = ENVSYS_SVALID; 317 1.2.2.2 mjf 318 1.2.2.2 mjf switch (i) { 319 1.2.2.2 mjf case 4: 320 1.2.2.2 mjf sc->regs[i] = SMSC_FAN1_LSB; 321 1.2.2.2 mjf break; 322 1.2.2.2 mjf 323 1.2.2.2 mjf case 5: 324 1.2.2.2 mjf sc->regs[i] = SMSC_FAN2_LSB; 325 1.2.2.2 mjf break; 326 1.2.2.2 mjf 327 1.2.2.2 mjf case 6: 328 1.2.2.2 mjf sc->regs[i] = SMSC_FAN3_LSB; 329 1.2.2.2 mjf break; 330 1.2.2.2 mjf 331 1.2.2.2 mjf case 7: 332 1.2.2.2 mjf sc->regs[i] = SMSC_FAN4_LSB; 333 1.2.2.2 mjf break; 334 1.2.2.2 mjf 335 1.2.2.2 mjf default: 336 1.2.2.2 mjf aprint_error(": more fans than expected"); 337 1.2.2.2 mjf break; 338 1.2.2.2 mjf } 339 1.2.2.2 mjf } 340 1.2.2.2 mjf 341 1.2.2.2 mjf sc->smsc_sysmon = &datap->sme; 342 1.2.2.2 mjf datap->sme.sme_nsensors = SMSC_MAX_SENSORS; 343 1.2.2.2 mjf datap->sme.sme_sensor_data = datap->smsc_sensor; 344 1.2.2.2 mjf datap->sme.sme_name = sc->sc_dev.dv_xname; 345 1.2.2.2 mjf datap->sme.sme_cookie = sc; 346 1.2.2.2 mjf datap->sme.sme_gtredata = smsc_gtredata; 347 1.2.2.2 mjf 348 1.2.2.2 mjf if ((error = sysmon_envsys_register(&datap->sme)) != 0) { 349 1.2.2.2 mjf aprint_error("%s: unable to register with sysmon (%d)\n", 350 1.2.2.2 mjf sc->sc_dev.dv_xname, error); 351 1.2.2.2 mjf return; 352 1.2.2.2 mjf } 353 1.2.2.2 mjf 354 1.2.2.2 mjf } 355 1.2.2.2 mjf 356 1.2.2.2 mjf /* 357 1.2.2.2 mjf * Get the data for the requested sensor, update the sysmon structure 358 1.2.2.2 mjf * with the retrieved value. 359 1.2.2.2 mjf */ 360 1.2.2.2 mjf static int 361 1.2.2.2 mjf smsc_gtredata(struct sysmon_envsys *sme, envsys_data_t *edata) 362 1.2.2.2 mjf { 363 1.2.2.2 mjf struct smsc_softc *sc = sme->sme_cookie; 364 1.2.2.2 mjf int i, reg; 365 1.2.2.2 mjf unsigned int rpm; 366 1.2.2.2 mjf uint8_t msb, lsb; 367 1.2.2.2 mjf 368 1.2.2.2 mjf i = edata->sensor; 369 1.2.2.2 mjf reg = sc->regs[i]; 370 1.2.2.2 mjf 371 1.2.2.2 mjf switch (edata->units) { 372 1.2.2.2 mjf case ENVSYS_STEMP: 373 1.2.2.2 mjf edata->value_cur = smsc_temp2muk(smsc_readreg(sc, reg)); 374 1.2.2.2 mjf break; 375 1.2.2.2 mjf 376 1.2.2.2 mjf case ENVSYS_SFANRPM: 377 1.2.2.2 mjf /* reading lsb first locks msb... */ 378 1.2.2.2 mjf lsb = smsc_readreg(sc, reg); 379 1.2.2.2 mjf msb = smsc_readreg(sc, reg + 1); /* XXX note explicit 380 1.2.2.2 mjf assumption that msb is 381 1.2.2.2 mjf the next register along */ 382 1.2.2.2 mjf rpm = (msb << 8) | lsb; 383 1.2.2.2 mjf edata->value_cur = smsc_reg2rpm(rpm); 384 1.2.2.2 mjf break; 385 1.2.2.2 mjf } 386 1.2.2.2 mjf 387 1.2.2.2 mjf edata->state = ENVSYS_SVALID; 388 1.2.2.2 mjf return 0; 389 1.2.2.2 mjf } 390
Indexes created Thu Oct 02 14:10:14 GMT 2025