sys/dev/powermng/km/km.c

   1 /*      $OpenBSD: km.c,v 1.8 2013/09/17 13:42:34 kettenis Exp $ */
   2
   3 /*
   4  * Copyright (c) 2008/2010 Constantine A. Murenin <cnst+dfly@bugmail.mojo.ru>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/param.h>
  20 #include <sys/systm.h>
  21 #include <sys/bus.h>
  22 #include <sys/sensors.h>
  23
  24 #include <machine/md_var.h>
  25 #include <machine/specialreg.h>
  26
  27 #include <bus/pci/pcivar.h>
  28 #include "pcidevs.h"
  29
  30
  31 /*
  32  * AMD Family 10h/11h/14h/15h Processors, Function 3 -- Miscellaneous Control
  33  */
  34
  35 /* Function 3 Registers */
  36 #define KM_REP_TEMP_CONTR_R     0xa4
  37 #define KM_THERMTRIP_STAT_R     0xe4
  38 #define KM_NORTHBRIDGE_CAP_R    0xe8
  39 #define KM_CPUID_FAMILY_MODEL_R 0xfc
  40
  41 /* Operations on Reported Temperature Control Register */
  42 #define KM_GET_CURTMP(r)        (((r) >> 21) & 0x7ff)
  43
  44 /* Operations on Thermtrip Status Register */
  45 #define KM_GET_DIODEOFFSET(r)   (((r) >> 8) & 0x7f)
  46
  47
  48 struct km_softc {
  49         device_t                sc_dev;
  50         struct ksensor          sc_sensor;
  51         struct ksensordev       sc_sensordev;
  52 };
  53
  54 static void     km_identify(driver_t *, device_t);
  55 static int      km_probe(device_t);
  56 static int      km_attach(device_t);
  57 static int      km_detach(device_t);
  58 static void     km_refresh(void *);
  59
  60 static device_method_t km_methods[] = {
  61         DEVMETHOD(device_identify,      km_identify),
  62         DEVMETHOD(device_probe,         km_probe),
  63         DEVMETHOD(device_attach,        km_attach),
  64         DEVMETHOD(device_detach,        km_detach),
  65         { NULL, NULL }
  66 };
  67
  68 static driver_t km_driver = {
  69         "km",
  70         km_methods,
  71         sizeof(struct km_softc)
  72 };
  73
  74 static devclass_t km_devclass;
  75
  76 DRIVER_MODULE(km, hostb, km_driver, km_devclass, NULL, NULL);
  77
  78
  79 static void
  80 km_identify(driver_t *driver, device_t parent)
  81 {
  82         if (km_probe(parent) == ENXIO)
  83                 return;
  84         if (device_find_child(parent, driver->name, -1) != NULL)
  85                 return;
  86         device_add_child(parent, driver->name, -1);
  87 }
  88
  89 static int
  90 km_probe(device_t dev)
  91 {
  92         char *desc;
  93
  94         if (pci_get_vendor(dev) != PCI_VENDOR_AMD)
  95                 return ENXIO;
  96
  97         switch (pci_get_device(dev)) {
  98         case PCI_PRODUCT_AMD_AMD64_F10_MISC:
  99                 desc = "AMD Family 10h temperature sensor";
 100                 break;
 101         case PCI_PRODUCT_AMD_AMD64_F11_MISC:
 102                 desc = "AMD Family 11h temperature sensor";
 103                 break;
 104         case PCI_PRODUCT_AMD_AMD64_F14_MISC:
 105                 if (CPUID_TO_FAMILY(cpu_id) == 0x12)
 106                         desc = "AMD Family 12h temperature sensor";
 107                 else
 108                         desc = "AMD Family 14h temperature sensor";
 109                 break;
 110         case PCI_PRODUCT_AMD_AMD64_F15_0x_MISC:
 111                 desc = "AMD Family 15/0xh temperature sensor";
 112                 break;
 113         case PCI_PRODUCT_AMD_AMD64_F15_1x_MISC:
 114                 desc = "AMD Family 15/1xh temperature sensor";
 115                 break;
 116         case PCI_PRODUCT_AMD_AMD64_F15_3x_MISC:
 117                 desc = "AMD Family 15/3xh temperature sensor";
 118                 break;
 119         case PCI_PRODUCT_AMD_AMD64_F16_MISC:
 120                 desc = "AMD Family 16h temperature sensor";
 121                 break;
 122         default:
 123                 return ENXIO;
 124         }
 125
 126         if (device_get_desc(dev) == NULL)
 127                 device_set_desc(dev, desc);
 128         return 0;
 129 }
 130
 131 static int
 132 km_attach(device_t dev)
 133 {
 134         struct km_softc *sc;
 135
 136         sc = device_get_softc(dev);
 137         sc->sc_dev = dev;
 138
 139         strlcpy(sc->sc_sensordev.xname, device_get_nameunit(dev),
 140             sizeof(sc->sc_sensordev.xname));
 141
 142         sc->sc_sensor.type = SENSOR_TEMP;
 143         sensor_attach(&sc->sc_sensordev, &sc->sc_sensor);
 144
 145         sensor_task_register(sc, km_refresh, 5);
 146
 147         sensordev_install(&sc->sc_sensordev);
 148         return 0;
 149 }
 150
 151 static int
 152 km_detach(device_t dev)
 153 {
 154         struct km_softc *sc = device_get_softc(dev);
 155
 156         sensordev_deinstall(&sc->sc_sensordev);
 157         sensor_task_unregister(sc);
 158         return 0;
 159 }
 160
 161 static void
 162 km_refresh(void *arg)
 163 {
 164         struct km_softc *sc = arg;
 165         struct ksensor  *s = &sc->sc_sensor;
 166         uint32_t        r;
 167         int             c;
 168
 169         r = pci_read_config(sc->sc_dev, KM_REP_TEMP_CONTR_R, 4);
 170         c = KM_GET_CURTMP(r);
 171         s->value = c * 125000 + 273150000;
 172 }