jbusppm.c revision 182918
1182918Smarius/*- 2182918Smarius * Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org> 3182918Smarius * All rights reserved. 4182918Smarius * 5182918Smarius * Redistribution and use in source and binary forms, with or without 6182918Smarius * modification, are permitted provided that the following conditions 7182918Smarius * are met: 8182918Smarius * 1. Redistributions of source code must retain the above copyright 9182918Smarius * notice, this list of conditions and the following disclaimer. 10182918Smarius * 2. Redistributions in binary form must reproduce the above copyright 11182918Smarius * notice, this list of conditions and the following disclaimer in the 12182918Smarius * documentation and/or other materials provided with the distribution. 13182918Smarius * 14182918Smarius * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15182918Smarius * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16182918Smarius * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17182918Smarius * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18182918Smarius * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19182918Smarius * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20182918Smarius * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21182918Smarius * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22182918Smarius * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23182918Smarius * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24182918Smarius * SUCH DAMAGE. 25182918Smarius */ 26182918Smarius 27182918Smarius#include <sys/cdefs.h> 28182918Smarius__FBSDID("$FreeBSD: head/sys/sparc64/sparc64/jbusppm.c 182918 2008-09-10 20:22:27Z marius $"); 29182918Smarius 30182918Smarius#include <sys/param.h> 31182918Smarius#include <sys/systm.h> 32182918Smarius#include <sys/bus.h> 33182918Smarius#include <sys/kernel.h> 34182918Smarius#include <sys/module.h> 35182918Smarius#include <sys/resource.h> 36182918Smarius#include <sys/rman.h> 37182918Smarius 38182918Smarius#include <dev/ofw/ofw_bus.h> 39182918Smarius 40182918Smarius#include <machine/bus.h> 41182918Smarius#include <machine/resource.h> 42182918Smarius 43182918Smarius#define JBUSPPM_NREG 2 44182918Smarius 45182918Smarius#define JBUSPPM_DEVID 0 46182918Smarius#define JBUSPPM_ESTAR 1 47182918Smarius 48182918Smarius#define JBUSPPM_DEVID_JID 0x00 49182918Smarius#define JBUSPPM_DEVID_JID_MASTER 0x00040000 50182918Smarius 51182918Smarius#define JBUSPPM_ESTAR_CTRL 0x00 52182918Smarius#define JBUSPPM_ESTAR_CTRL_1 0x00000001 53182918Smarius#define JBUSPPM_ESTAR_CTRL_2 0x00000002 54182918Smarius#define JBUSPPM_ESTAR_CTRL_32 0x00000020 55182918Smarius#define JBUSPPM_ESTAR_CTRL_MASK \ 56182918Smarius (JBUSPPM_ESTAR_CTRL_1 | JBUSPPM_ESTAR_CTRL_2 | JBUSPPM_ESTAR_CTRL_32) 57182918Smarius#define JBUSPPM_ESTAR_JCHNG 0x08 58182918Smarius#define JBUSPPM_ESTAR_JCHNG_DELAY_MASK 0x00000007 59182918Smarius#define JBUSPPM_ESTAR_JCHNG_START 0x00000010 60182918Smarius#define JBUSPPM_ESTAR_JCHNG_OCCURED 0x00000018 61182918Smarius 62182918Smariusstruct jbusppm_softc { 63182918Smarius struct resource *sc_res[JBUSPPM_NREG]; 64182918Smarius bus_space_tag_t sc_bt[JBUSPPM_NREG]; 65182918Smarius bus_space_handle_t sc_bh[JBUSPPM_NREG]; 66182918Smarius}; 67182918Smarius 68182918Smarius#define JBUSPPM_READ(sc, reg, off) \ 69182918Smarius bus_space_read_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off)) 70182918Smarius#define JBUSPPM_WRITE(sc, reg, off, val) \ 71182918Smarius bus_space_write_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off), (val)) 72182918Smarius 73182918Smariusstatic device_probe_t jbusppm_probe; 74182918Smariusstatic device_attach_t jbusppm_attach; 75182918Smarius 76182918Smariusstatic device_method_t jbusppm_methods[] = { 77182918Smarius /* Device interface */ 78182918Smarius DEVMETHOD(device_probe, jbusppm_probe), 79182918Smarius DEVMETHOD(device_attach, jbusppm_attach), 80182918Smarius 81182918Smarius { NULL, NULL } 82182918Smarius}; 83182918Smarius 84182918Smariusstatic devclass_t jbusppm_devclass; 85182918Smarius 86182918SmariusDEFINE_CLASS_0(jbusppm, jbusppm_driver, jbusppm_methods, 87182918Smarius sizeof(struct jbusppm_softc)); 88182918SmariusDRIVER_MODULE(jbusppm, nexus, jbusppm_driver, jbusppm_devclass, 0, 0); 89182918Smarius 90182918Smariusstatic int 91182918Smariusjbusppm_probe(device_t dev) 92182918Smarius{ 93182918Smarius const char* compat; 94182918Smarius 95182918Smarius compat = ofw_bus_get_compat(dev); 96182918Smarius if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 && 97182918Smarius strcmp(compat, "jbus-ppm") == 0) { 98182918Smarius device_set_desc(dev, "JBus power management"); 99182918Smarius return (BUS_PROBE_DEFAULT); 100182918Smarius } 101182918Smarius return (ENXIO); 102182918Smarius} 103182918Smarius 104182918Smariusstatic int 105182918Smariusjbusppm_attach(device_t dev) 106182918Smarius{ 107182918Smarius struct jbusppm_softc *sc; 108182918Smarius int i, rid; 109182918Smarius#if 1 110182918Smarius device_t *children, tomatillo; 111182918Smarius u_long tcount, tstart, jcount, jstart; 112182918Smarius int j, nchildren; 113182918Smarius#endif 114182918Smarius 115182918Smarius sc = device_get_softc(dev); 116182918Smarius for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR; i++) { 117182918Smarius rid = i; 118182918Smarius /* 119182918Smarius * The JBUSPPM_ESTAR resources is shared with that of the 120182918Smarius * Tomatillo bus A controller configuration register bank. 121182918Smarius */ 122182918Smarius#if 0 123182918Smarius sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 124182918Smarius &rid, (i == JBUSPPM_ESTAR ? RF_SHAREABLE : 0) | RF_ACTIVE); 125182918Smarius if (sc->sc_res[i] == NULL) { 126182918Smarius device_printf(dev, 127182918Smarius "could not allocate resource %d\n", i); 128182918Smarius goto fail; 129182918Smarius } 130182918Smarius sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]); 131182918Smarius sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]); 132182918Smarius#else 133182918Smarius /* 134182918Smarius * Workaround for the fact that rman(9) only allows to 135182918Smarius * share resources of the same size. 136182918Smarius */ 137182918Smarius if (i == JBUSPPM_ESTAR) { 138182918Smarius if (bus_get_resource(dev, SYS_RES_MEMORY, i, &jstart, 139182918Smarius &jcount) != 0) { 140182918Smarius device_printf(dev, 141182918Smarius "could not determine Estar resource\n"); 142182918Smarius goto fail; 143182918Smarius } 144182918Smarius if (device_get_children(device_get_parent(dev), 145182918Smarius &children, &nchildren) != 0) { 146182918Smarius device_printf(dev, "could not get children\n"); 147182918Smarius goto fail; 148182918Smarius } 149182918Smarius tomatillo = NULL; 150182918Smarius for (j = 0; j < nchildren; j++) { 151182918Smarius if (ofw_bus_get_type(children[j]) != NULL && 152182918Smarius strcmp(ofw_bus_get_type(children[j]), 153182918Smarius "pci") == 0 && 154182918Smarius ofw_bus_get_compat(children[j]) != NULL && 155182918Smarius strcmp(ofw_bus_get_compat(children[j]), 156182918Smarius "pci108e,a801") == 0 && 157182918Smarius ((bus_get_resource_start(children[j], 158182918Smarius SYS_RES_MEMORY, 0) >> 20) & 1) == 0) { 159182918Smarius tomatillo = children[j]; 160182918Smarius break; 161182918Smarius } 162182918Smarius } 163182918Smarius free(children, M_TEMP); 164182918Smarius if (tomatillo == NULL) { 165182918Smarius device_printf(dev, 166182918Smarius "could not find Tomatillo\n"); 167182918Smarius goto fail; 168182918Smarius } 169182918Smarius if (bus_get_resource(tomatillo, SYS_RES_MEMORY, 1, 170182918Smarius &tstart, &tcount) != 0) { 171182918Smarius device_printf(dev, 172182918Smarius "could not determine Tomatillo " 173182918Smarius "resource\n"); 174182918Smarius goto fail; 175182918Smarius } 176182918Smarius sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY, 177182918Smarius &rid, tstart, tstart + tcount - 1, tcount, 178182918Smarius RF_SHAREABLE | RF_ACTIVE); 179182918Smarius } else 180182918Smarius sc->sc_res[i] = bus_alloc_resource_any(dev, 181182918Smarius SYS_RES_MEMORY, &rid, RF_ACTIVE); 182182918Smarius if (sc->sc_res[i] == NULL) { 183182918Smarius device_printf(dev, 184182918Smarius "could not allocate resource %d\n", i); 185182918Smarius goto fail; 186182918Smarius } 187182918Smarius sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]); 188182918Smarius sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]); 189182918Smarius if (i == JBUSPPM_ESTAR) 190182918Smarius bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i], 191182918Smarius jstart - tstart, jcount, &sc->sc_bh[i]); 192182918Smarius#endif 193182918Smarius } 194182918Smarius 195182918Smarius if (bootverbose) { 196182918Smarius if ((JBUSPPM_READ(sc, JBUSPPM_DEVID, JBUSPPM_DEVID_JID) & 197182918Smarius JBUSPPM_DEVID_JID_MASTER) != 0) 198182918Smarius device_printf(dev, "master I/O bridge\n"); 199182918Smarius device_printf(dev, "running at "); 200182918Smarius switch (JBUSPPM_READ(sc, JBUSPPM_ESTAR, JBUSPPM_ESTAR_CTRL) & 201182918Smarius JBUSPPM_ESTAR_CTRL_MASK) { 202182918Smarius case JBUSPPM_ESTAR_CTRL_1: 203182918Smarius printf("full"); 204182918Smarius break; 205182918Smarius case JBUSPPM_ESTAR_CTRL_2: 206182918Smarius printf("half"); 207182918Smarius break; 208182918Smarius case JBUSPPM_ESTAR_CTRL_32: 209182918Smarius printf("1/32"); 210182918Smarius break; 211182918Smarius default: 212182918Smarius printf("unknown"); 213182918Smarius break; 214182918Smarius } 215182918Smarius printf(" speed\n"); 216182918Smarius } 217182918Smarius 218182918Smarius return (0); 219182918Smarius 220182918Smarius fail: 221182918Smarius for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR && sc->sc_res[i] != NULL; 222182918Smarius i++) 223182918Smarius bus_release_resource(dev, SYS_RES_MEMORY, 224182918Smarius rman_get_rid(sc->sc_res[i]), sc->sc_res[i]); 225182918Smarius return (ENXIO); 226182918Smarius} 227