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/*-
* Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <dev/ofw/ofw_bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#if 1
#include <sparc64/pci/ofw_pci.h>
#endif
#define JBUSPPM_NREG 2
#define JBUSPPM_DEVID 0
#define JBUSPPM_ESTAR 1
#define JBUSPPM_DEVID_JID 0x00
#define JBUSPPM_DEVID_JID_MASTER 0x00040000
#define JBUSPPM_ESTAR_CTRL 0x00
#define JBUSPPM_ESTAR_CTRL_1 0x00000001
#define JBUSPPM_ESTAR_CTRL_2 0x00000002
#define JBUSPPM_ESTAR_CTRL_32 0x00000020
#define JBUSPPM_ESTAR_CTRL_MASK \
(JBUSPPM_ESTAR_CTRL_1 | JBUSPPM_ESTAR_CTRL_2 | JBUSPPM_ESTAR_CTRL_32)
#define JBUSPPM_ESTAR_JCHNG 0x08
#define JBUSPPM_ESTAR_JCHNG_DELAY_MASK 0x00000007
#define JBUSPPM_ESTAR_JCHNG_START 0x00000010
#define JBUSPPM_ESTAR_JCHNG_OCCURED 0x00000018
struct jbusppm_softc {
struct resource *sc_res[JBUSPPM_NREG];
bus_space_tag_t sc_bt[JBUSPPM_NREG];
bus_space_handle_t sc_bh[JBUSPPM_NREG];
};
#define JBUSPPM_READ(sc, reg, off) \
bus_space_read_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off))
#define JBUSPPM_WRITE(sc, reg, off, val) \
bus_space_write_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off), (val))
static device_probe_t jbusppm_probe;
static device_attach_t jbusppm_attach;
static device_method_t jbusppm_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, jbusppm_probe),
DEVMETHOD(device_attach, jbusppm_attach),
DEVMETHOD_END
};
static devclass_t jbusppm_devclass;
DEFINE_CLASS_0(jbusppm, jbusppm_driver, jbusppm_methods,
sizeof(struct jbusppm_softc));
DRIVER_MODULE(jbusppm, nexus, jbusppm_driver, jbusppm_devclass, 0, 0);
static int
jbusppm_probe(device_t dev)
{
const char* compat;
compat = ofw_bus_get_compat(dev);
if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 &&
strcmp(compat, "jbus-ppm") == 0) {
device_set_desc(dev, "JBus power management");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
jbusppm_attach(device_t dev)
{
struct jbusppm_softc *sc;
int i, rid;
#if 1
device_t *children, tomatillo;
u_long tcount, tstart, jcount, jstart;
int j, nchildren;
#endif
sc = device_get_softc(dev);
for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR; i++) {
rid = i;
/*
* The JBUSPPM_ESTAR resources is shared with that of the
* Tomatillo bus A controller configuration register bank.
*/
#if 0
sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&rid, (i == JBUSPPM_ESTAR ? RF_SHAREABLE : 0) | RF_ACTIVE);
if (sc->sc_res[i] == NULL) {
device_printf(dev,
"could not allocate resource %d\n", i);
goto fail;
}
sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
#else
/*
* Workaround for the fact that rman(9) only allows to
* share resources of the same size.
*/
if (i == JBUSPPM_ESTAR) {
if (bus_get_resource(dev, SYS_RES_MEMORY, i, &jstart,
&jcount) != 0) {
device_printf(dev,
"could not determine Estar resource\n");
goto fail;
}
if (device_get_children(device_get_parent(dev),
&children, &nchildren) != 0) {
device_printf(dev, "could not get children\n");
goto fail;
}
tomatillo = NULL;
for (j = 0; j < nchildren; j++) {
if (ofw_bus_get_type(children[j]) != NULL &&
strcmp(ofw_bus_get_type(children[j]),
OFW_TYPE_PCI) == 0 &&
ofw_bus_get_compat(children[j]) != NULL &&
strcmp(ofw_bus_get_compat(children[j]),
"pci108e,a801") == 0 &&
((bus_get_resource_start(children[j],
SYS_RES_MEMORY, 0) >> 20) & 1) == 0) {
tomatillo = children[j];
break;
}
}
free(children, M_TEMP);
if (tomatillo == NULL) {
device_printf(dev,
"could not find Tomatillo\n");
goto fail;
}
if (bus_get_resource(tomatillo, SYS_RES_MEMORY, 1,
&tstart, &tcount) != 0) {
device_printf(dev,
"could not determine Tomatillo "
"resource\n");
goto fail;
}
sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY,
&rid, tstart, tstart + tcount - 1, tcount,
RF_SHAREABLE | RF_ACTIVE);
} else
sc->sc_res[i] = bus_alloc_resource_any(dev,
SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (sc->sc_res[i] == NULL) {
device_printf(dev,
"could not allocate resource %d\n", i);
goto fail;
}
sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
if (i == JBUSPPM_ESTAR)
bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i],
jstart - tstart, jcount, &sc->sc_bh[i]);
#endif
}
if (bootverbose) {
if ((JBUSPPM_READ(sc, JBUSPPM_DEVID, JBUSPPM_DEVID_JID) &
JBUSPPM_DEVID_JID_MASTER) != 0)
device_printf(dev, "master I/O bridge\n");
device_printf(dev, "running at ");
switch (JBUSPPM_READ(sc, JBUSPPM_ESTAR, JBUSPPM_ESTAR_CTRL) &
JBUSPPM_ESTAR_CTRL_MASK) {
case JBUSPPM_ESTAR_CTRL_1:
printf("full");
break;
case JBUSPPM_ESTAR_CTRL_2:
printf("half");
break;
case JBUSPPM_ESTAR_CTRL_32:
printf("1/32");
break;
default:
printf("unknown");
break;
}
printf(" speed\n");
}
return (0);
fail:
for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR && sc->sc_res[i] != NULL;
i++)
bus_release_resource(dev, SYS_RES_MEMORY,
rman_get_rid(sc->sc_res[i]), sc->sc_res[i]);
return (ENXIO);
}
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