freebsd-dev/sys/dev/bhnd/bcma/bcma_bhndb.c
2017-12-08 15:57:29 +00:00

177 lines
4.7 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2015 Landon Fuller <landon@landonf.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,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <dev/bhnd/bhnd_ids.h>
#include <dev/bhnd/bhndb/bhndbvar.h>
#include <dev/bhnd/bhndb/bhndb_hwdata.h>
#include "bcmavar.h"
#include "bcma_eromreg.h"
#include "bcma_eromvar.h"
/*
* Supports attachment of bcma(4) bus devices via a bhndb bridge.
*/
static int
bcma_bhndb_probe(device_t dev)
{
const struct bhnd_chipid *cid;
int error;
/* Defer to default probe implementation */
if ((error = bcma_probe(dev)) > 0)
return (error);
/* Check bus type */
cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
if (cid->chip_type != BHND_CHIPTYPE_BCMA)
return (ENXIO);
/* Set device description */
bhnd_set_default_bus_desc(dev, cid);
return (error);
}
static int
bcma_bhndb_attach(device_t dev)
{
int error;
/* Perform initial attach and enumerate our children. */
if ((error = bcma_attach(dev)))
goto failed;
/* Delegate remainder to standard bhnd method implementation */
if ((error = bhnd_generic_attach(dev)))
goto failed;
return (0);
failed:
device_delete_children(dev);
return (error);
}
static int
bcma_bhndb_suspend_child(device_t dev, device_t child)
{
struct bcma_devinfo *dinfo;
int error;
if (device_get_parent(child) != dev)
BUS_SUSPEND_CHILD(device_get_parent(dev), child);
if (device_is_suspended(child))
return (EBUSY);
dinfo = device_get_ivars(child);
/* Suspend the child */
if ((error = bhnd_generic_br_suspend_child(dev, child)))
return (error);
/* Suspend child's agent resource */
if (dinfo->res_agent != NULL)
BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
SYS_RES_MEMORY, dinfo->res_agent->res);
return (0);
}
static int
bcma_bhndb_resume_child(device_t dev, device_t child)
{
struct bcma_devinfo *dinfo;
int error;
if (device_get_parent(child) != dev)
BUS_SUSPEND_CHILD(device_get_parent(dev), child);
if (!device_is_suspended(child))
return (EBUSY);
dinfo = device_get_ivars(child);
/* Resume child's agent resource */
if (dinfo->res_agent != NULL) {
error = BHNDB_RESUME_RESOURCE(device_get_parent(dev), dev,
SYS_RES_MEMORY, dinfo->res_agent->res);
if (error)
return (error);
}
/* Resume the child */
if ((error = bhnd_generic_br_resume_child(dev, child))) {
/* On failure, re-suspend the agent resource */
if (dinfo->res_agent != NULL) {
BHNDB_SUSPEND_RESOURCE(device_get_parent(dev), dev,
SYS_RES_MEMORY, dinfo->res_agent->res);
}
return (error);
}
return (0);
}
static device_method_t bcma_bhndb_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, bcma_bhndb_probe),
DEVMETHOD(device_attach, bcma_bhndb_attach),
/* Bus interface */
DEVMETHOD(bus_suspend_child, bcma_bhndb_suspend_child),
DEVMETHOD(bus_resume_child, bcma_bhndb_resume_child),
DEVMETHOD_END
};
DEFINE_CLASS_2(bhnd, bcma_bhndb_driver, bcma_bhndb_methods,
sizeof(struct bcma_softc), bhnd_bhndb_driver, bcma_driver);
DRIVER_MODULE(bcma_bhndb, bhndb, bcma_bhndb_driver, bhnd_devclass, NULL, NULL);
MODULE_VERSION(bcma_bhndb, 1);
MODULE_DEPEND(bcma_bhndb, bcma, 1, 1, 1);
MODULE_DEPEND(bcma_bhndb, bhnd, 1, 1, 1);
MODULE_DEPEND(bcma_bhndb, bhndb, 1, 1, 1);