smusat.c revision 208842
138889Sjdp/*- 2218822Sdim * Copyright (c) 2010 Nathan Whitehorn 385815Sobrien * All rights reserved. 438889Sjdp * 538889Sjdp * Redistribution and use in source and binary forms, with or without 685815Sobrien * modification, are permitted provided that the following conditions 785815Sobrien * are met: 885815Sobrien * 1. Redistributions of source code must retain the above copyright 985815Sobrien * notice, this list of conditions and the following disclaimer. 1038889Sjdp * 2. Redistributions in binary form must reproduce the above copyright 1185815Sobrien * notice, this list of conditions and the following disclaimer in the 1285815Sobrien * documentation and/or other materials provided with the distribution. 1385815Sobrien * 1485815Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1538889Sjdp * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1685815Sobrien * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1785815Sobrien * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18218822Sdim * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19218822Sdim * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 2038889Sjdp * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 21104834Sobrien * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 22104834Sobrien * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2338889Sjdp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2438889Sjdp * SUCH DAMAGE. 2538889Sjdp * 2638889Sjdp */ 2785815Sobrien 2860484Sobrien#include <sys/cdefs.h> 2938889Sjdp__FBSDID("$FreeBSD: head/sys/powerpc/powermac/smusat.c 208842 2010-06-05 17:51:37Z nwhitehorn $"); 3085815Sobrien 3185815Sobrien#include <sys/param.h> 3285815Sobrien#include <sys/systm.h> 3338889Sjdp#include <sys/module.h> 3485815Sobrien#include <sys/bus.h> 3585815Sobrien#include <sys/conf.h> 3685815Sobrien#include <sys/cpu.h> 3738889Sjdp#include <sys/ctype.h> 38218822Sdim#include <sys/kernel.h> 39218822Sdim#include <sys/sysctl.h> 40218822Sdim 41218822Sdim#include <dev/iicbus/iicbus.h> 42218822Sdim#include <dev/iicbus/iiconf.h> 43218822Sdim#include <dev/ofw/ofw_bus.h> 44218822Sdim#include <dev/ofw/openfirm.h> 45218822Sdim 46218822Sdimstruct smu_sensor { 47218822Sdim cell_t reg; 48218822Sdim char location[32]; 49218822Sdim enum { 50218822Sdim SMU_CURRENT_SENSOR, 51218822Sdim SMU_VOLTAGE_SENSOR, 52218822Sdim SMU_POWER_SENSOR, 53218822Sdim SMU_TEMP_SENSOR 54218822Sdim } type; 55218822Sdim}; 56218822Sdim 57218822Sdimstatic int smusat_probe(device_t); 58218822Sdimstatic int smusat_attach(device_t); 59218822Sdimstatic int smusat_sensor_sysctl(SYSCTL_HANDLER_ARGS); 6089857Sobrien 6189857SobrienMALLOC_DEFINE(M_SMUSAT, "smusat", "SMU Sattelite Sensors"); 6289857Sobrien 6389857Sobrienstatic device_method_t smusat_methods[] = { 6489857Sobrien /* Device interface */ 6589857Sobrien DEVMETHOD(device_probe, smusat_probe), 6638889Sjdp DEVMETHOD(device_attach, smusat_attach), 6785815Sobrien { 0, 0 }, 6885815Sobrien}; 6989857Sobrien 7085815Sobrienstruct smusat_softc { 7189857Sobrien struct smu_sensor *sc_sensors; 7289857Sobrien int sc_nsensors; 7389857Sobrien 7489857Sobrien uint8_t sc_cache[16]; 7589857Sobrien time_t sc_last_update; 7689857Sobrien}; 7789857Sobrien 7885815Sobrienstatic driver_t smusat_driver = { 7985815Sobrien "smusat", 8085815Sobrien smusat_methods, 8185815Sobrien sizeof(struct smusat_softc) 8285815Sobrien}; 8385815Sobrien 8485815Sobrienstatic devclass_t smusat_devclass; 8585815Sobrien 8685815SobrienDRIVER_MODULE(smusat, iicbus, smusat_driver, smusat_devclass, 0, 0); 8785815Sobrien 8885815Sobrienstatic int 8985815Sobriensmusat_probe(device_t dev) 9085815Sobrien{ 9185815Sobrien const char *compat = ofw_bus_get_compat(dev); 9285815Sobrien 9385815Sobrien if (compat == NULL || strcmp(compat, "smu-sat") != 0) 9485815Sobrien return (ENXIO); 9585815Sobrien 9685815Sobrien device_set_desc(dev, "SMU Satellite Sensors"); 9785815Sobrien return (0); 9885815Sobrien} 9985815Sobrien 10085815Sobrienstatic int 10185815Sobriensmusat_attach(device_t dev) 10285815Sobrien{ 10385815Sobrien phandle_t child; 10485815Sobrien struct smu_sensor *sens; 10585815Sobrien struct smusat_softc *sc; 10685815Sobrien struct sysctl_oid *sensroot_oid; 10785815Sobrien struct sysctl_ctx_list *ctx; 10885815Sobrien char type[32]; 10985815Sobrien int i; 11085815Sobrien 11185815Sobrien sc = device_get_softc(dev); 11285815Sobrien sc->sc_nsensors = 0; 11385815Sobrien sc->sc_last_update = 0; 11485815Sobrien 11585815Sobrien for (child = OF_child(ofw_bus_get_node(dev)); child != 0; 11685815Sobrien child = OF_peer(child)) 11785815Sobrien sc->sc_nsensors++; 11885815Sobrien 11985815Sobrien if (sc->sc_nsensors == 0) { 12085815Sobrien device_printf(dev, "WARNING: No sensors detected!\n"); 12185815Sobrien return (-1); 12285815Sobrien } 12389857Sobrien 12485815Sobrien sc->sc_sensors = malloc(sc->sc_nsensors * sizeof(struct smu_sensor), 12585815Sobrien M_SMUSAT, M_WAITOK | M_ZERO); 12685815Sobrien 12785815Sobrien sens = sc->sc_sensors; 12885815Sobrien sc->sc_nsensors = 0; 12985815Sobrien 13085815Sobrien ctx = device_get_sysctl_ctx(dev); 13185815Sobrien sensroot_oid = device_get_sysctl_tree(dev); 13285815Sobrien 13385815Sobrien for (child = OF_child(ofw_bus_get_node(dev)); child != 0; 13485815Sobrien child = OF_peer(child)) { 13585815Sobrien char sysctl_name[40], sysctl_desc[40]; 13685815Sobrien const char *units; 13785815Sobrien 13885815Sobrien sens->reg = 0; 13985815Sobrien OF_getprop(child, "reg", &sens->reg, sizeof(sens->reg)); 14085815Sobrien if (sens->reg < 0x30) 14185815Sobrien continue; 14285815Sobrien 14385815Sobrien sens->reg -= 0x30; 14485815Sobrien OF_getprop(child, "location", sens->location, 14585815Sobrien sizeof(sens->location)); 14685815Sobrien 14785815Sobrien OF_getprop(child, "device_type", type, sizeof(type)); 148218822Sdim 149218822Sdim if (strcmp(type, "current-sensor") == 0) { 150218822Sdim sens->type = SMU_CURRENT_SENSOR; 151218822Sdim units = "mA"; 152218822Sdim } else if (strcmp(type, "temp-sensor") == 0) { 153218822Sdim sens->type = SMU_TEMP_SENSOR; 154218822Sdim units = "C"; 155218822Sdim } else if (strcmp(type, "voltage-sensor") == 0) { 156218822Sdim sens->type = SMU_VOLTAGE_SENSOR; 15785815Sobrien units = "mV"; 15885815Sobrien } else if (strcmp(type, "power-sensor") == 0) { 15985815Sobrien sens->type = SMU_POWER_SENSOR; 16085815Sobrien units = "mW"; 16189857Sobrien } else { 16285815Sobrien continue; 16389857Sobrien } 16485815Sobrien 16589857Sobrien for (i = 0; i < strlen(sens->location); i++) { 16685815Sobrien sysctl_name[i] = tolower(sens->location[i]); 16789857Sobrien if (isspace(sysctl_name[i])) 16885815Sobrien sysctl_name[i] = '_'; 16985815Sobrien } 17085815Sobrien sysctl_name[i] = 0; 17185815Sobrien 172218822Sdim sprintf(sysctl_desc,"%s (%s)", sens->location, units); 17338889Sjdp SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(sensroot_oid), OID_AUTO, 17485815Sobrien sysctl_name, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev, 17585815Sobrien sc->sc_nsensors, smusat_sensor_sysctl, "I", sysctl_desc); 17685815Sobrien 17785815Sobrien sens++; 17838889Sjdp sc->sc_nsensors++; 17985815Sobrien } 180218822Sdim 18185815Sobrien return (0); 18285815Sobrien} 18385815Sobrien 18485815Sobrienstatic int 18585815Sobriensmusat_updatecache(device_t dev) 18685815Sobrien{ 18785815Sobrien uint8_t reg = 0x3f; 188218822Sdim struct smusat_softc *sc = device_get_softc(dev); 18985815Sobrien struct iic_msg msgs[2] = { 19085815Sobrien {0, IIC_M_WR | IIC_M_NOSTOP, 1, ®}, 19185815Sobrien {0, IIC_M_RD, 16, sc->sc_cache}, 19285815Sobrien }; 19385815Sobrien 19485815Sobrien msgs[0].slave = msgs[1].slave = iicbus_get_addr(dev); 19585815Sobrien sc->sc_last_update = time_uptime; 196218822Sdim 197218822Sdim return (iicbus_transfer(dev, msgs, 2)); 198218822Sdim} 199218822Sdim 20085815Sobrienstatic int 20185815Sobriensmusat_sensor_read(device_t dev, struct smu_sensor *sens, int *val) 20285815Sobrien{ 20385815Sobrien int value; 20485815Sobrien struct smusat_softc *sc; 20585815Sobrien 20685815Sobrien sc = device_get_softc(dev); 207218822Sdim 20885815Sobrien if (time_uptime - sc->sc_last_update > 1) 20985815Sobrien smusat_updatecache(dev); 21085815Sobrien 21185815Sobrien value = (sc->sc_cache[sens->reg*2] << 8) + 21285815Sobrien sc->sc_cache[sens->reg*2 + 1]; 21385815Sobrien 214218822Sdim switch (sens->type) { 21585815Sobrien case SMU_TEMP_SENSOR: 21685815Sobrien /* 16.16 */ 21785815Sobrien value <<= 10; 21885815Sobrien /* Kill the .16 */ 21985815Sobrien value >>= 16; 22038889Sjdp break; 22185815Sobrien case SMU_VOLTAGE_SENSOR: 22285815Sobrien /* 16.16 */ 22385815Sobrien value <<= 4; 22485815Sobrien /* Kill the .16 */ 22585815Sobrien value >>= 16; 22685815Sobrien break; 22789857Sobrien case SMU_CURRENT_SENSOR: 22885815Sobrien /* 16.16 */ 22938889Sjdp value <<= 8; 23085815Sobrien /* Kill the .16 */ 23185815Sobrien value >>= 16; 23238889Sjdp break; 23389857Sobrien case SMU_POWER_SENSOR: 234218822Sdim /* Doesn't exist */ 23585815Sobrien break; 23689857Sobrien } 23785815Sobrien 23885815Sobrien *val = value; 23985815Sobrien return (0); 240218822Sdim} 24189857Sobrien 242218822Sdimstatic int 24389857Sobriensmusat_sensor_sysctl(SYSCTL_HANDLER_ARGS) 24489857Sobrien{ 24585815Sobrien device_t dev; 24685815Sobrien struct smusat_softc *sc; 24785815Sobrien struct smu_sensor *sens; 24885815Sobrien int value, error; 24985815Sobrien 25089857Sobrien dev = arg1; 25189857Sobrien sc = device_get_softc(dev); 25285815Sobrien sens = &sc->sc_sensors[arg2]; 25385815Sobrien 25489857Sobrien error = smusat_sensor_read(dev, sens, &value); 25589857Sobrien if (error != 0) 25689857Sobrien return (error); 25789857Sobrien 25885815Sobrien error = sysctl_handle_int(oidp, &value, 0, req); 25985815Sobrien 26085815Sobrien return (error); 26185815Sobrien} 26285815Sobrien 26389857Sobrien