syscon: Introduce kobj and split out fdt bits
Allow more flexibility by kobj'ifying syscon and splitting out fdt specific bits in preparation of a move to the extres framework. The generic fdt driver has been moved to syscon_generic.c and the fdt requirement has been removed from the syscon interface, as is common to the extres framework. Reviewed by: strejda Differential Revision: https://reviews.freebsd.org/D13521
This commit is contained in:
Kyle Evans
parent
04291531bc
commit
4d68f3daa0
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=327106
@ -3107,8 +3107,9 @@ dev/stg/tmc18c30_subr.c optional stg
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dev/stge/if_stge.c optional stge
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dev/sym/sym_hipd.c optional sym \
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dependency "$S/dev/sym/sym_{conf,defs}.h"
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dev/syscon/syscon.c optional fdt syscon
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dev/syscon/syscon_if.m optional fdt syscon
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dev/syscon/syscon.c optional syscon
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dev/syscon/syscon_generic.c optional fdt syscon
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dev/syscon/syscon_if.m optional syscon
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dev/syscons/blank/blank_saver.c optional blank_saver
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dev/syscons/daemon/daemon_saver.c optional daemon_saver
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dev/syscons/dragon/dragon_saver.c optional dragon_saver
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@ -1,5 +1,5 @@
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/*-
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* Copyright (c) 2015 Michal Meloun
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* Copyright (c) 2017 Kyle Evans <kevans@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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77
sys/dev/syscon/syscon.h
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77
sys/dev/syscon/syscon.h
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@ -0,0 +1,77 @@
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/*-
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* Copyright 2017 Kyle Evans <kevans@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef DEV_SYSCON_H
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#define DEV_SYSCON_H
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#include "opt_platform.h"
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#include <sys/types.h>
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#include <sys/kobj.h>
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#ifdef FDT
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#include <dev/ofw/ofw_bus.h>
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#endif
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struct syscon {
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KOBJ_FIELDS;
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TAILQ_ENTRY(syscon) syscon_link; /* Global list entry */
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device_t pdev; /* provider device */
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#ifdef FDT
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phandle_t ofw_node; /* OFW node for syscon */
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#endif
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void *softc; /* provider softc */
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};
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/*
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* Shorthands for constructing method tables.
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*/
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#define SYSCONMETHOD KOBJMETHOD
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#define SYSCONMETHOD_END KOBJMETHOD_END
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#define syscon_method_t kobj_method_t
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#define syscon_class_t kobj_class_t
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DECLARE_CLASS(syscon_class);
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void *syscon_get_softc(struct syscon *syscon);
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/*
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* Provider interface
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*/
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struct syscon *syscon_create(device_t pdev, syscon_class_t syscon_class);
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struct syscon *syscon_register(struct syscon *syscon);
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int syscon_unregister(struct syscon *syscon);
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#ifdef FDT
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struct syscon *syscon_create_ofw_node(device_t pdev,
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syscon_class_t syscon_class, phandle_t node);
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phandle_t syscon_get_ofw_node(struct syscon *syscon);
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int syscon_get_by_ofw_property(device_t consumer, phandle_t node, char *name,
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struct syscon **syscon);
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#endif
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#endif /* DEV_SYSCON_H */
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211
sys/dev/syscon/syscon_generic.c
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211
sys/dev/syscon/syscon_generic.c
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@ -0,0 +1,211 @@
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/*-
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* Copyright (c) 2015 Michal Meloun
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* This is a generic syscon driver, whose purpose is to provide access to
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* various unrelated bits packed in a single register space. It is usually used
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* as a fallback to more specific driver, but works well enough for simple
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* access.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include "syscon_if.h"
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#include "syscon.h"
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MALLOC_DECLARE(M_SYSCON);
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static uint32_t syscon_generic_read_4(struct syscon *syscon, bus_size_t offset);
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static int syscon_generic_write_4(struct syscon *syscon, bus_size_t offset,
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uint32_t val);
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static int syscon_generic_modify_4(struct syscon *syscon, bus_size_t offset,
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uint32_t clear_bits, uint32_t set_bits);
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/*
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* Generic syscon driver (FDT)
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*/
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struct syscon_generic_softc {
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device_t dev;
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struct syscon *syscon;
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struct resource *mem_res;
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struct mtx mtx;
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};
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static struct ofw_compat_data compat_data[] = {
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{"syscon", 1},
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{NULL, 0}
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};
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#define SYSCON_LOCK(_sc) mtx_lock(&(_sc)->mtx)
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#define SYSCON_UNLOCK(_sc) mtx_unlock(&(_sc)->mtx)
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#define SYSCON_LOCK_INIT(_sc) mtx_init(&(_sc)->mtx, \
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device_get_nameunit((_sc)->dev), "syscon", MTX_DEF)
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#define SYSCON_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->mtx);
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#define SYSCON_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_OWNED);
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#define SYSCON_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->mtx, MA_NOTOWNED);
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static syscon_method_t syscon_generic_methods[] = {
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SYSCONMETHOD(syscon_read_4, syscon_generic_read_4),
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SYSCONMETHOD(syscon_write_4, syscon_generic_write_4),
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SYSCONMETHOD(syscon_modify_4, syscon_generic_modify_4),
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SYSCONMETHOD_END
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};
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DEFINE_CLASS_1(syscon_generic, syscon_generic_class, syscon_generic_methods,
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0, syscon_class);
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static uint32_t
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syscon_generic_read_4(struct syscon *syscon, bus_size_t offset)
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{
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struct syscon_generic_softc *sc;
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uint32_t val;
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sc = device_get_softc(syscon->pdev);
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SYSCON_LOCK(sc);
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val = bus_read_4(sc->mem_res, offset);
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SYSCON_UNLOCK(sc);
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return (val);
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}
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static int
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syscon_generic_write_4(struct syscon *syscon, bus_size_t offset, uint32_t val)
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{
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struct syscon_generic_softc *sc;
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sc = device_get_softc(syscon->pdev);
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SYSCON_LOCK(sc);
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bus_write_4(sc->mem_res, offset, val);
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SYSCON_UNLOCK(sc);
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return (0);
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}
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static int
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syscon_generic_modify_4(struct syscon *syscon, bus_size_t offset,
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uint32_t clear_bits, uint32_t set_bits)
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{
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struct syscon_generic_softc *sc;
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uint32_t val;
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sc = device_get_softc(syscon->pdev);
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SYSCON_LOCK(sc);
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val = bus_read_4(sc->mem_res, offset);
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val &= ~clear_bits;
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val |= set_bits;
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bus_write_4(sc->mem_res, offset, val);
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SYSCON_UNLOCK(sc);
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return (0);
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}
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static int
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syscon_generic_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "syscon");
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return (BUS_PROBE_GENERIC);
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}
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static int
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syscon_generic_attach(device_t dev)
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{
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struct syscon_generic_softc *sc;
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int rid;
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sc = device_get_softc(dev);
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sc->dev = dev;
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rid = 0;
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sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->mem_res == NULL) {
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device_printf(dev, "Cannot allocate memory resource\n");
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return (ENXIO);
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}
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SYSCON_LOCK_INIT(sc);
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sc->syscon = syscon_create_ofw_node(dev, &syscon_generic_class,
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ofw_bus_get_node(dev));
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if (sc->syscon == NULL) {
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device_printf(dev, "Failed to create/register syscon\n");
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return (ENXIO);
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}
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return (0);
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}
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static int
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syscon_generic_detach(device_t dev)
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{
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struct syscon_generic_softc *sc;
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sc = device_get_softc(dev);
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if (sc->syscon != NULL) {
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syscon_unregister(sc->syscon);
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free(sc->syscon, M_SYSCON);
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}
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SYSCON_LOCK_DESTROY(sc);
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if (sc->mem_res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
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return (0);
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}
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static device_method_t syscon_generic_dmethods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, syscon_generic_probe),
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DEVMETHOD(device_attach, syscon_generic_attach),
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DEVMETHOD(device_detach, syscon_generic_detach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_0(syscon_generic, syscon_generic_driver, syscon_generic_dmethods,
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sizeof(struct syscon_generic_softc));
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static devclass_t syscon_generic_devclass;
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EARLY_DRIVER_MODULE(syscon_generic, simplebus, syscon_generic_driver,
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syscon_generic_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_LATE);
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MODULE_VERSION(syscon_generic, 1);
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@ -30,25 +30,34 @@
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INTERFACE syscon;
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HEADER {
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struct syscon;
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}
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METHOD int init {
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struct syscon *syscon;
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};
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METHOD int uninit {
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struct syscon *syscon;
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};
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/**
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* Accessor functions for syscon register space
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*/
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METHOD uint32_t read_4 {
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device_t dev;
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device_t consumer;
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struct syscon *syscon;
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bus_size_t offset;
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};
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METHOD void write_4 {
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device_t dev;
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device_t consumer;
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METHOD int write_4 {
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struct syscon *syscon;
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bus_size_t offset;
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uint32_t val;
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};
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METHOD void modify_4 {
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device_t dev;
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device_t consumer;
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METHOD int modify_4 {
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struct syscon *syscon;
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bus_size_t offset;
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uint32_t clear_bits;
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uint32_t set_bits;
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