sys/dev/powermng/wbsio/wbsio.c

   1 /*      $NetBSD: wbsio.c,v 1.1 2010/02/21 05:16:29 cnst Exp $   */
   2 /*      $OpenBSD: wbsio.c,v 1.5 2009/03/29 21:53:52 sthen Exp $ */
   3 /*
   4  * Copyright (c) 2008 Mark Kettenis <kettenis@openbsd.org>
   5  * Copyright (c) 2010 Constantine A. Murenin <cnst++@dragonflybsd.org>
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /*
  21  * Winbond LPC Super I/O driver.
  22  */
  23
  24 #include <sys/param.h>
  25 #include <sys/bus.h>
  26 #include <sys/kernel.h>
  27 #include <sys/module.h>
  28 #include <sys/rman.h>
  29 #include <sys/systm.h>
  30
  31 #include <bus/isa/isavar.h>
  32
  33 /* ISA bus registers */
  34 #define WBSIO_INDEX             0x00    /* Configuration Index Register */
  35 #define WBSIO_DATA              0x01    /* Configuration Data Register */
  36
  37 #define WBSIO_IOSIZE            0x02    /* ISA I/O space size */
  38
  39 #define WBSIO_CONF_EN_MAGIC     0x87    /* enable configuration mode */
  40 #define WBSIO_CONF_DS_MAGIC     0xaa    /* disable configuration mode */
  41
  42 /* Configuration Space Registers */
  43 #define WBSIO_LDN               0x07    /* Logical Device Number */
  44 #define WBSIO_ID                0x20    /* Device ID */
  45 #define WBSIO_REV               0x21    /* Device Revision */
  46
  47 #define WBSIO_ID_W83627HF       0x52
  48 #define WBSIO_ID_W83627THF      0x82
  49 #define WBSIO_ID_W83627EHF      0x88
  50 #define WBSIO_ID_W83627DHG      0xa0
  51 #define WBSIO_ID_W83627SF       0x59
  52 #define WBSIO_ID_W83637HF       0x70
  53 #define WBSIO_ID_W83697HF       0x60
  54
  55 /* Logical Device Number (LDN) Assignments */
  56 #define WBSIO_LDN_HM            0x0b
  57
  58 /* Hardware Monitor Control Registers (LDN B) */
  59 #define WBSIO_HM_ADDR_MSB       0x60    /* Address [15:8] */
  60 #define WBSIO_HM_ADDR_LSB       0x61    /* Address [7:0] */
  61
  62 struct wbsio_softc {
  63         struct device           *sc_dev;
  64
  65         struct resource         *sc_iores;
  66         int                     sc_iorid;
  67
  68         bus_space_tag_t         sc_iot;
  69         bus_space_handle_t      sc_ioh;
  70 };
  71
  72 static int      wbsio_probe(struct device *);
  73 static int      wbsio_attach(struct device *);
  74 static int      wbsio_detach(struct device *);
  75
  76 static device_method_t wbsio_methods[] = {
  77         DEVMETHOD(device_probe,         wbsio_probe),
  78         DEVMETHOD(device_attach,        wbsio_attach),
  79         DEVMETHOD(device_detach,        wbsio_detach),
  80
  81         { NULL, NULL}
  82 };
  83
  84 static driver_t wbsio_driver = {
  85         "wbsio",
  86         wbsio_methods,
  87         sizeof(struct wbsio_softc)
  88 };
  89
  90 static devclass_t wbsio_devclass;
  91
  92 DRIVER_MODULE(wbsio, isa, wbsio_driver, wbsio_devclass, NULL, NULL);
  93
  94
  95 static __inline void
  96 wbsio_conf_enable(bus_space_tag_t iot, bus_space_handle_t ioh)
  97 {
  98         bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
  99         bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
 100 }
 101
 102 static __inline void
 103 wbsio_conf_disable(bus_space_tag_t iot, bus_space_handle_t ioh)
 104 {
 105         bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_DS_MAGIC);
 106 }
 107
 108 static __inline u_int8_t
 109 wbsio_conf_read(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index)
 110 {
 111         bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
 112         return (bus_space_read_1(iot, ioh, WBSIO_DATA));
 113 }
 114
 115 static __inline void
 116 wbsio_conf_write(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index,
 117     u_int8_t data)
 118 {
 119         bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
 120         bus_space_write_1(iot, ioh, WBSIO_DATA, data);
 121 }
 122
 123 static int
 124 wbsio_probe(struct device *dev)
 125 {
 126         struct resource *iores;
 127         int iorid = 0;
 128         bus_space_tag_t iot;
 129         bus_space_handle_t ioh;
 130         uint8_t reg_id, reg_rev;
 131         const char *desc = NULL;
 132         char fulldesc[64];
 133
 134         /* Match by device ID */
 135
 136         iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &iorid,
 137             0ul, ~0ul, WBSIO_IOSIZE,
 138             RF_ACTIVE);
 139         if (iores == NULL)
 140                 return ENXIO;
 141         iot = rman_get_bustag(iores);
 142         ioh = rman_get_bushandle(iores);
 143
 144         wbsio_conf_enable(iot, ioh);
 145         /* Read device ID */
 146         reg_id = wbsio_conf_read(iot, ioh, WBSIO_ID);
 147         /* Read device revision */
 148         reg_rev = wbsio_conf_read(iot, ioh, WBSIO_REV);
 149         wbsio_conf_disable(iot, ioh);
 150         bus_release_resource(dev, SYS_RES_IOPORT, iorid, iores);
 151
 152         switch (reg_id) {
 153         case WBSIO_ID_W83627HF:
 154                 desc = "W83627HF";
 155                 break;
 156         case WBSIO_ID_W83627THF:
 157                 desc = "W83627THF";
 158                 break;
 159         case WBSIO_ID_W83627EHF:
 160                 desc = "W83627EHF";
 161                 break;
 162         case WBSIO_ID_W83627DHG:
 163                 desc = "W83627DHG";
 164                 break;
 165         case WBSIO_ID_W83637HF:
 166                 desc = "W83637HF";
 167                 break;
 168         case WBSIO_ID_W83697HF:
 169                 desc = "W83697HF";
 170                 break;
 171         }
 172
 173         if (desc == NULL)
 174                 return ENXIO;
 175
 176         ksnprintf(fulldesc, sizeof(fulldesc),
 177             "Winbond LPC Super I/O %s rev 0x%02x", desc, reg_rev);
 178         device_set_desc_copy(dev, fulldesc);
 179         return 0;
 180 }
 181
 182 static int
 183 wbsio_attach(struct device *dev)
 184 {
 185         struct wbsio_softc *sc = device_get_softc(dev);
 186         uint8_t reg0, reg1;
 187         uint16_t iobase;
 188         struct device *parent = device_get_parent(dev);
 189         struct device *child;
 190         struct devclass *c_dc;
 191         int c_maxunit;
 192
 193         /* Map ISA I/O space */
 194         sc->sc_iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->sc_iorid,
 195             0ul, ~0ul, WBSIO_IOSIZE,
 196             RF_ACTIVE);
 197         if (sc->sc_iores == NULL) {
 198                 device_printf(dev, "can't map i/o space\n");
 199                 return ENXIO;
 200         }
 201         sc->sc_iot = rman_get_bustag(sc->sc_iores);
 202         sc->sc_ioh = rman_get_bushandle(sc->sc_iores);
 203
 204         /* Enter configuration mode */
 205         wbsio_conf_enable(sc->sc_iot, sc->sc_ioh);
 206
 207         /* Select HM logical device */
 208         wbsio_conf_write(sc->sc_iot, sc->sc_ioh, WBSIO_LDN, WBSIO_LDN_HM);
 209
 210         /*
 211          * The address should be 8-byte aligned, but it seems some
 212          * BIOSes ignore this.  They get away with it, because
 213          * Apparently the hardware simply ignores the lower three
 214          * bits.  We do the same here.
 215          */
 216         reg0 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_LSB);
 217         reg1 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_MSB);
 218         iobase = (reg1 << 8) | (reg0 & ~0x7);
 219         device_printf(dev, "hardware monitor iobase is 0x%x\n", iobase);
 220
 221         /* Escape from configuration mode */
 222         wbsio_conf_disable(sc->sc_iot, sc->sc_ioh);
 223
 224         if (iobase == 0) {
 225                 device_printf(dev, "no hardware monitor configured\n");
 226                 return 0;
 227         }
 228
 229         child = NULL;
 230         c_dc = devclass_find("lm");
 231         if (c_dc == NULL) {
 232                 device_printf(dev, "lm devclass not found\n");
 233                 return ENXIO;
 234         }
 235         c_maxunit = devclass_get_maxunit(c_dc);
 236         for (int u = 0; u < c_maxunit; u++) {
 237                 child = devclass_get_device(c_dc, u);
 238                 if (child == NULL)
 239                         continue;
 240                 if (isa_get_port(child) == iobase) {
 241                         if (device_is_attached(child)) {
 242                                 device_printf(dev,
 243                                     "%s is already attached at 0x%x\n",
 244                                     device_get_nameunit(child), iobase);
 245                                 return 0;
 246                         }
 247                         break;
 248                 }
 249                 if (device_is_attached(child)) {
 250                         child = NULL;
 251                         continue;
 252                 }
 253                 device_printf(dev,
 254                     "found unused %s at 0x%x with state %i, reusing at 0x%x\n",
 255                     device_get_nameunit(child), isa_get_port(child),
 256                     device_get_state(child), iobase);
 257                 break;
 258         }
 259         if (child == NULL)
 260                 child = BUS_ADD_CHILD(parent, parent, ISA_ORDER_PNP,
 261                     "lm", -1);
 262 //      child = BUS_ADD_CHILD(parent, parent, ISA_ORDER_PNP,
 263 //          "lm", 3 + device_get_unit(dev));
 264         if (child == NULL) {
 265                 device_printf(dev, "cannot add child\n");
 266                 return ENXIO;
 267         }
 268         if (bus_set_resource(child, SYS_RES_IOPORT, 0, iobase, 8)) {
 269                 device_printf(dev, "cannot set resource\n");
 270                 return ENXIO;
 271         }
 272         return device_probe_and_attach(child);
 273 }
 274
 275 static int
 276 wbsio_detach(struct device *dev)
 277 {
 278         struct wbsio_softc *sc = device_get_softc(dev);
 279
 280         return bus_release_resource(dev, SYS_RES_IOPORT,
 281             sc->sc_iorid, sc->sc_iores);
 282 }