freebsd-nq/sys/dev/bhnd/bcma/bcma_bhndb.c
Adrian Chadd 4ad7e9b01a Bring over the initial rewrite of the broadcom bus support found in their
SoCs and various chips (including, famously, their wifi chips.)

This is "just" (all 20,000 lines of it) code to enumerate the various
versions of busses inside these devices, including the PCI bridge and
the direct SIBA bridge found in MIPS chips.

It also includes shared code for some bus operations (suspend, resume, etc);
EEPROM/SROM/etc parsing and other things that are shared between chips.

Eventually this'll replace the code that bwi/bwn uses for the internal
bus, as well as some apparently upcoming mips74k broadcom SoC support
which uses bwn!

Thanks to Landon Fuller <landonf@landonf.org> for all this work!

Obtained from:	https://github.com/landonf/freebsd/compare/user/landonf/bcm4331-CURRENT
2016-02-26 03:34:08 +00:00

184 lines
5.0 KiB
C

/*-
* 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;
/* Check bus type */
cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
if (cid->chip_type != BHND_CHIPTYPE_BCMA)
return (ENXIO);
/* Delegate to default probe implementation */
return (bcma_probe(dev));
}
static int
bcma_bhndb_attach(device_t dev)
{
const struct bhnd_chipid *cid;
struct resource *erom_res;
int error;
int rid;
cid = BHNDB_GET_CHIPID(device_get_parent(dev), dev);
/* Map the EROM resource and enumerate our children. */
rid = 0;
erom_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, cid->enum_addr,
cid->enum_addr + BCMA_EROM_TABLE_SIZE, BCMA_EROM_TABLE_SIZE,
RF_ACTIVE);
if (erom_res == NULL) {
device_printf(dev, "failed to allocate EROM resource\n");
return (ENXIO);
}
error = bcma_add_children(dev, erom_res, BCMA_EROM_TABLE_START);
/* Clean up */
bus_release_resource(dev, SYS_RES_MEMORY, rid, erom_res);
if (error)
return (error);
/* Initialize full bridge configuration */
error = BHNDB_INIT_FULL_CONFIG(device_get_parent(dev), dev,
bhndb_bcma_priority_table);
if (error)
return (error);
/* Call our superclass' implementation */
return (bcma_attach(dev));
}
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_1(bhnd, bcma_bhndb_driver, bcma_bhndb_methods,
sizeof(struct bcma_softc), 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, bhndb, 1, 1, 1);