sys/sparc64/sparc64/jbusppm.c

   1 /*-
   2  * Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/bus.h>
  33 #include <sys/kernel.h>
  34 #include <sys/module.h>
  35 #include <sys/resource.h>
  36 #include <sys/rman.h>
  37
  38 #include <dev/ofw/ofw_bus.h>
  39
  40 #include <machine/bus.h>
  41 #include <machine/resource.h>
  42
  43 #define JBUSPPM_NREG    2
  44
  45 #define JBUSPPM_DEVID   0
  46 #define JBUSPPM_ESTAR   1
  47
  48 #define JBUSPPM_DEVID_JID               0x00
  49 #define JBUSPPM_DEVID_JID_MASTER        0x00040000
  50
  51 #define JBUSPPM_ESTAR_CTRL              0x00
  52 #define JBUSPPM_ESTAR_CTRL_1            0x00000001
  53 #define JBUSPPM_ESTAR_CTRL_2            0x00000002
  54 #define JBUSPPM_ESTAR_CTRL_32           0x00000020
  55 #define JBUSPPM_ESTAR_CTRL_MASK                                         \
  56         (JBUSPPM_ESTAR_CTRL_1 | JBUSPPM_ESTAR_CTRL_2 | JBUSPPM_ESTAR_CTRL_32)
  57 #define JBUSPPM_ESTAR_JCHNG             0x08
  58 #define JBUSPPM_ESTAR_JCHNG_DELAY_MASK  0x00000007
  59 #define JBUSPPM_ESTAR_JCHNG_START       0x00000010
  60 #define JBUSPPM_ESTAR_JCHNG_OCCURED     0x00000018
  61
  62 struct jbusppm_softc {
  63         struct resource         *sc_res[JBUSPPM_NREG];
  64         bus_space_tag_t         sc_bt[JBUSPPM_NREG];
  65         bus_space_handle_t      sc_bh[JBUSPPM_NREG];
  66 };
  67
  68 #define JBUSPPM_READ(sc, reg, off)                                      \
  69         bus_space_read_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off))
  70 #define JBUSPPM_WRITE(sc, reg, off, val)                                \
  71         bus_space_write_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off), (val))
  72
  73 static device_probe_t jbusppm_probe;
  74 static device_attach_t jbusppm_attach;
  75
  76 static device_method_t jbusppm_methods[] = {
  77         /* Device interface */
  78         DEVMETHOD(device_probe,         jbusppm_probe),
  79         DEVMETHOD(device_attach,        jbusppm_attach),
  80
  81         KOBJMETHOD_END
  82 };
  83
  84 static devclass_t jbusppm_devclass;
  85
  86 DEFINE_CLASS_0(jbusppm, jbusppm_driver, jbusppm_methods,
  87     sizeof(struct jbusppm_softc));
  88 DRIVER_MODULE(jbusppm, nexus, jbusppm_driver, jbusppm_devclass, 0, 0);
  89
  90 static int
  91 jbusppm_probe(device_t dev)
  92 {
  93         const char* compat;
  94
  95         compat = ofw_bus_get_compat(dev);
  96         if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 &&
  97             strcmp(compat, "jbus-ppm") == 0) {
  98                 device_set_desc(dev, "JBus power management");
  99                 return (BUS_PROBE_DEFAULT);
 100         }
 101         return (ENXIO);
 102 }
 103
 104 static int
 105 jbusppm_attach(device_t dev)
 106 {
 107         struct jbusppm_softc *sc;
 108         int i, rid;
 109 #if 1
 110         device_t *children, tomatillo;
 111         u_long tcount, tstart, jcount, jstart;
 112         int j, nchildren;
 113 #endif
 114
 115         sc = device_get_softc(dev);
 116         for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR; i++) {
 117                 rid = i;
 118                 /*
 119                  * The JBUSPPM_ESTAR resources is shared with that of the
 120                  * Tomatillo bus A controller configuration register bank.
 121                  */
 122 #if 0
 123                 sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
 124                     &rid, (i == JBUSPPM_ESTAR ? RF_SHAREABLE : 0) | RF_ACTIVE);
 125                 if (sc->sc_res[i] == NULL) {
 126                         device_printf(dev,
 127                             "could not allocate resource %d\n", i);
 128                         goto fail;
 129                 }
 130                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
 131                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
 132 #else
 133                 /*
 134                  * Workaround for the fact that rman(9) only allows to
 135                  * share resources of the same size.
 136                  */
 137                 if (i == JBUSPPM_ESTAR) {
 138                         if (bus_get_resource(dev, SYS_RES_MEMORY, i, &jstart,
 139                             &jcount) != 0) {
 140                                 device_printf(dev,
 141                                     "could not determine Estar resource\n");
 142                                 goto fail;
 143                         }
 144                         if (device_get_children(device_get_parent(dev),
 145                             &children, &nchildren) != 0) {
 146                                 device_printf(dev, "could not get children\n");
 147                                 goto fail;
 148                         }
 149                         tomatillo = NULL;
 150                         for (j = 0; j < nchildren; j++) {
 151                                 if (ofw_bus_get_type(children[j]) != NULL &&
 152                                     strcmp(ofw_bus_get_type(children[j]),
 153                                     "pci") == 0 &&
 154                                     ofw_bus_get_compat(children[j]) != NULL &&
 155                                     strcmp(ofw_bus_get_compat(children[j]),
 156                                     "pci108e,a801") == 0 &&
 157                                     ((bus_get_resource_start(children[j],
 158                                     SYS_RES_MEMORY, 0) >> 20) & 1) == 0) {
 159                                         tomatillo = children[j];
 160                                         break;
 161                                 }
 162                         }
 163                         free(children, M_TEMP);
 164                         if (tomatillo == NULL) {
 165                                 device_printf(dev,
 166                                     "could not find Tomatillo\n");
 167                                 goto fail;
 168                         }
 169                         if (bus_get_resource(tomatillo, SYS_RES_MEMORY, 1,
 170                             &tstart, &tcount) != 0) {
 171                                 device_printf(dev,
 172                                     "could not determine Tomatillo "
 173                                     "resource\n");
 174                                 goto fail;
 175                         }
 176                         sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY,
 177                             &rid, tstart, tstart + tcount - 1, tcount,
 178                             RF_SHAREABLE | RF_ACTIVE);
 179                 } else
 180                         sc->sc_res[i] = bus_alloc_resource_any(dev,
 181                             SYS_RES_MEMORY, &rid, RF_ACTIVE);
 182                 if (sc->sc_res[i] == NULL) {
 183                         device_printf(dev,
 184                             "could not allocate resource %d\n", i);
 185                         goto fail;
 186                 }
 187                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
 188                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
 189                 if (i == JBUSPPM_ESTAR)
 190                         bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i],
 191                             jstart - tstart, jcount, &sc->sc_bh[i]);
 192 #endif
 193         }
 194
 195         if (bootverbose) {
 196                 if ((JBUSPPM_READ(sc, JBUSPPM_DEVID, JBUSPPM_DEVID_JID) &
 197                     JBUSPPM_DEVID_JID_MASTER) != 0)
 198                         device_printf(dev, "master I/O bridge\n");
 199                 device_printf(dev, "running at ");
 200                 switch (JBUSPPM_READ(sc, JBUSPPM_ESTAR, JBUSPPM_ESTAR_CTRL) &
 201                     JBUSPPM_ESTAR_CTRL_MASK) {
 202                 case JBUSPPM_ESTAR_CTRL_1:
 203                         printf("full");
 204                         break;
 205                 case JBUSPPM_ESTAR_CTRL_2:
 206                         printf("half");
 207                         break;
 208                 case JBUSPPM_ESTAR_CTRL_32:
 209                         printf("1/32");
 210                         break;
 211                 default:
 212                         printf("unknown");
 213                         break;
 214                 }
 215                 printf(" speed\n");
 216         }
 217
 218         return (0);
 219
 220  fail:
 221         for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR && sc->sc_res[i] != NULL;
 222             i++)
 223                 bus_release_resource(dev, SYS_RES_MEMORY,
 224                     rman_get_rid(sc->sc_res[i]), sc->sc_res[i]);
 225         return (ENXIO);
 226 }