4e96bf3a37
The bwn(4) driver requires a number of extensions to the bhnd(4) PMU interface to support external configuration of PLLs, LDOs, and other parameters that require chipset or PHY-specific workarounds. These changes add support for: - Writing raw voltage register values to PHY-specific LDO regulator registers (required by LP-PHY). - Enabling/disabling PHY-specific LDOs (required by LP-PHY) - Writing to arbitrary PMU chipctrl registers (required for common PHY PLL reset support). - Requesting chipset/PLL-specific spurious signal avoidance modes. - Querying clock frequency and latency. Additionally, rather than updating legacy PWRCTL support to conform to the new PMU interface: - PWRCTL API is now provided by a bhnd_pwrctl_if.m interface. - Since PWRCTL is only found in older SSB-based chipsets, translation from bhnd(4) bus APIs to corresponding PWRCTL operations is now handled entirely within the siba(4) driver. - The PWRCTL-specific host bridge clock gating APIs in bhnd_bus_if.m have been lifted out into a standalone bhnd_pwrctl_hostb_if.m interface. Approved by: adrian (mentor, implicit) Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D12664
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*-
|
|
* Copyright (c) 2015-2016 Landon Fuller <landon@freebsd.org>
|
|
* Copyright (c) 2007 Bruce M. Simpson.
|
|
* 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/kernel.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/module.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <sys/rman.h>
|
|
#include <machine/resource.h>
|
|
|
|
#include <dev/bhnd/bhnd_ids.h>
|
|
|
|
#include <dev/bhnd/siba/sibareg.h>
|
|
#include <dev/bhnd/siba/sibavar.h>
|
|
|
|
#include "bcm_machdep.h"
|
|
#include "bcm_mipsvar.h"
|
|
|
|
#include "bhnd_nexusvar.h"
|
|
|
|
/*
|
|
* Supports siba(4) attachment to a MIPS nexus bus.
|
|
*
|
|
* Derived from Bruce M. Simpson' original siba(4) driver.
|
|
*/
|
|
|
|
_Static_assert(SIBA_MAX_INTR == BCM_MIPS_NINTR, "SIBA incompatible with "
|
|
"generic NINTR");
|
|
|
|
static int
|
|
siba_nexus_probe(device_t dev)
|
|
{
|
|
int error;
|
|
|
|
if (bcm_get_platform()->cid.chip_type != BHND_CHIPTYPE_SIBA)
|
|
return (ENXIO);
|
|
|
|
if ((error = siba_probe(dev)) > 0)
|
|
return (error);
|
|
|
|
/* Set device description */
|
|
bhnd_set_default_bus_desc(dev, &bcm_get_platform()->cid);
|
|
|
|
return (BUS_PROBE_SPECIFIC);
|
|
}
|
|
|
|
static int
|
|
siba_nexus_attach(device_t dev)
|
|
{
|
|
int error;
|
|
|
|
/* Perform initial attach and enumerate our children. */
|
|
if ((error = siba_attach(dev)))
|
|
return (error);
|
|
|
|
/* Delegate remainder to standard bhnd method implementation */
|
|
if ((error = bhnd_generic_attach(dev)))
|
|
goto failed;
|
|
|
|
return (0);
|
|
|
|
failed:
|
|
siba_detach(dev);
|
|
return (error);
|
|
}
|
|
|
|
static device_method_t siba_nexus_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, siba_nexus_probe),
|
|
DEVMETHOD(device_attach, siba_nexus_attach),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
DEFINE_CLASS_2(bhnd, siba_nexus_driver, siba_nexus_methods,
|
|
sizeof(struct siba_softc), bhnd_nexus_driver, siba_driver);
|
|
|
|
EARLY_DRIVER_MODULE(siba_nexus, nexus, siba_nexus_driver, bhnd_devclass, 0, 0,
|
|
BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE);
|