sys/sparc64/sparc64/jbusppm.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/bus.h>
  35 #include <sys/kernel.h>
  36 #include <sys/module.h>
  37 #include <sys/resource.h>
  38 #include <sys/rman.h>
  39
  40 #include <dev/ofw/ofw_bus.h>
  41
  42 #include <machine/bus.h>
  43 #include <machine/resource.h>
  44
  45 #if 1
  46 #include <sparc64/pci/ofw_pci.h>
  47 #endif
  48
  49 #define JBUSPPM_NREG    2
  50
  51 #define JBUSPPM_DEVID   0
  52 #define JBUSPPM_ESTAR   1
  53
  54 #define JBUSPPM_DEVID_JID               0x00
  55 #define JBUSPPM_DEVID_JID_MASTER        0x00040000
  56
  57 #define JBUSPPM_ESTAR_CTRL              0x00
  58 #define JBUSPPM_ESTAR_CTRL_1            0x00000001
  59 #define JBUSPPM_ESTAR_CTRL_2            0x00000002
  60 #define JBUSPPM_ESTAR_CTRL_32           0x00000020
  61 #define JBUSPPM_ESTAR_CTRL_MASK                                         \
  62         (JBUSPPM_ESTAR_CTRL_1 | JBUSPPM_ESTAR_CTRL_2 | JBUSPPM_ESTAR_CTRL_32)
  63 #define JBUSPPM_ESTAR_JCHNG             0x08
  64 #define JBUSPPM_ESTAR_JCHNG_DELAY_MASK  0x00000007
  65 #define JBUSPPM_ESTAR_JCHNG_START       0x00000010
  66 #define JBUSPPM_ESTAR_JCHNG_OCCURED     0x00000018
  67
  68 struct jbusppm_softc {
  69         struct resource         *sc_res[JBUSPPM_NREG];
  70         bus_space_tag_t         sc_bt[JBUSPPM_NREG];
  71         bus_space_handle_t      sc_bh[JBUSPPM_NREG];
  72 };
  73
  74 #define JBUSPPM_READ(sc, reg, off)                                      \
  75         bus_space_read_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off))
  76 #define JBUSPPM_WRITE(sc, reg, off, val)                                \
  77         bus_space_write_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off), (val))
  78
  79 static device_probe_t jbusppm_probe;
  80 static device_attach_t jbusppm_attach;
  81
  82 static device_method_t jbusppm_methods[] = {
  83         /* Device interface */
  84         DEVMETHOD(device_probe,         jbusppm_probe),
  85         DEVMETHOD(device_attach,        jbusppm_attach),
  86
  87         DEVMETHOD_END
  88 };
  89
  90 static devclass_t jbusppm_devclass;
  91
  92 DEFINE_CLASS_0(jbusppm, jbusppm_driver, jbusppm_methods,
  93     sizeof(struct jbusppm_softc));
  94 DRIVER_MODULE(jbusppm, nexus, jbusppm_driver, jbusppm_devclass, 0, 0);
  95
  96 static int
  97 jbusppm_probe(device_t dev)
  98 {
  99         const char* compat;
 100
 101         compat = ofw_bus_get_compat(dev);
 102         if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 &&
 103             strcmp(compat, "jbus-ppm") == 0) {
 104                 device_set_desc(dev, "JBus power management");
 105                 return (BUS_PROBE_DEFAULT);
 106         }
 107         return (ENXIO);
 108 }
 109
 110 static int
 111 jbusppm_attach(device_t dev)
 112 {
 113         struct jbusppm_softc *sc;
 114         int i, rid;
 115 #if 1
 116         device_t *children, tomatillo;
 117         u_long tcount, tstart, jcount, jstart;
 118         int j, nchildren;
 119 #endif
 120
 121         sc = device_get_softc(dev);
 122         for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR; i++) {
 123                 rid = i;
 124                 /*
 125                  * The JBUSPPM_ESTAR resources is shared with that of the
 126                  * Tomatillo bus A controller configuration register bank.
 127                  */
 128 #if 0
 129                 sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
 130                     &rid, (i == JBUSPPM_ESTAR ? RF_SHAREABLE : 0) | RF_ACTIVE);
 131                 if (sc->sc_res[i] == NULL) {
 132                         device_printf(dev,
 133                             "could not allocate resource %d\n", i);
 134                         goto fail;
 135                 }
 136                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
 137                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
 138 #else
 139                 /*
 140                  * Workaround for the fact that rman(9) only allows to
 141                  * share resources of the same size.
 142                  */
 143                 if (i == JBUSPPM_ESTAR) {
 144                         if (bus_get_resource(dev, SYS_RES_MEMORY, i, &jstart,
 145                             &jcount) != 0) {
 146                                 device_printf(dev,
 147                                     "could not determine Estar resource\n");
 148                                 goto fail;
 149                         }
 150                         if (device_get_children(device_get_parent(dev),
 151                             &children, &nchildren) != 0) {
 152                                 device_printf(dev, "could not get children\n");
 153                                 goto fail;
 154                         }
 155                         tomatillo = NULL;
 156                         for (j = 0; j < nchildren; j++) {
 157                                 if (ofw_bus_get_type(children[j]) != NULL &&
 158                                     strcmp(ofw_bus_get_type(children[j]),
 159                                     OFW_TYPE_PCI) == 0 &&
 160                                     ofw_bus_get_compat(children[j]) != NULL &&
 161                                     strcmp(ofw_bus_get_compat(children[j]),
 162                                     "pci108e,a801") == 0 &&
 163                                     ((bus_get_resource_start(children[j],
 164                                     SYS_RES_MEMORY, 0) >> 20) & 1) == 0) {
 165                                         tomatillo = children[j];
 166                                         break;
 167                                 }
 168                         }
 169                         free(children, M_TEMP);
 170                         if (tomatillo == NULL) {
 171                                 device_printf(dev,
 172                                     "could not find Tomatillo\n");
 173                                 goto fail;
 174                         }
 175                         if (bus_get_resource(tomatillo, SYS_RES_MEMORY, 1,
 176                             &tstart, &tcount) != 0) {
 177                                 device_printf(dev,
 178                                     "could not determine Tomatillo "
 179                                     "resource\n");
 180                                 goto fail;
 181                         }
 182                         sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY,
 183                             &rid, tstart, tstart + tcount - 1, tcount,
 184                             RF_SHAREABLE | RF_ACTIVE);
 185                 } else
 186                         sc->sc_res[i] = bus_alloc_resource_any(dev,
 187                             SYS_RES_MEMORY, &rid, RF_ACTIVE);
 188                 if (sc->sc_res[i] == NULL) {
 189                         device_printf(dev,
 190                             "could not allocate resource %d\n", i);
 191                         goto fail;
 192                 }
 193                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
 194                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
 195                 if (i == JBUSPPM_ESTAR)
 196                         bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i],
 197                             jstart - tstart, jcount, &sc->sc_bh[i]);
 198 #endif
 199         }
 200
 201         if (bootverbose) {
 202                 if ((JBUSPPM_READ(sc, JBUSPPM_DEVID, JBUSPPM_DEVID_JID) &
 203                     JBUSPPM_DEVID_JID_MASTER) != 0)
 204                         device_printf(dev, "master I/O bridge\n");
 205                 device_printf(dev, "running at ");
 206                 switch (JBUSPPM_READ(sc, JBUSPPM_ESTAR, JBUSPPM_ESTAR_CTRL) &
 207                     JBUSPPM_ESTAR_CTRL_MASK) {
 208                 case JBUSPPM_ESTAR_CTRL_1:
 209                         printf("full");
 210                         break;
 211                 case JBUSPPM_ESTAR_CTRL_2:
 212                         printf("half");
 213                         break;
 214                 case JBUSPPM_ESTAR_CTRL_32:
 215                         printf("1/32");
 216                         break;
 217                 default:
 218                         printf("unknown");
 219                         break;
 220                 }
 221                 printf(" speed\n");
 222         }
 223
 224         return (0);
 225
 226  fail:
 227         for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR && sc->sc_res[i] != NULL;
 228             i++)
 229                 bus_release_resource(dev, SYS_RES_MEMORY,
 230                     rman_get_rid(sc->sc_res[i]), sc->sc_res[i]);
 231         return (ENXIO);
 232 }