Add support for system controller nodes.
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jmcneill
parent
a1405d385b
commit
5b0333eb17
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@ -0,0 +1,98 @@
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/* $NetBSD: fdt_syscon.c,v 1.1 2018/06/30 12:35:18 jmcneill Exp $ */
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/*-
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* Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
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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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: fdt_syscon.c,v 1.1 2018/06/30 12:35:18 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kmem.h>
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#include <sys/queue.h>
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#include <libfdt.h>
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#include <dev/fdt/fdtvar.h>
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struct syscon;
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struct fdtbus_syscon {
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device_t sc_dev;
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int sc_phandle;
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struct syscon *sc_syscon;
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LIST_ENTRY(fdtbus_syscon) sc_next;
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};
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LIST_HEAD(fdtbus_syscon_h, fdtbus_syscon);
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static struct fdtbus_syscon_h fdtbus_syscons =
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LIST_HEAD_INITIALIZER(fdtbus_syscons);
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int
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fdtbus_register_syscon(device_t dev, int phandle,
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struct syscon *syscon)
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{
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struct fdtbus_syscon *sc;
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sc = kmem_alloc(sizeof(*sc), KM_SLEEP);
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sc->sc_dev = dev;
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sc->sc_phandle = phandle;
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sc->sc_syscon = syscon;
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LIST_INSERT_HEAD(&fdtbus_syscons, sc, sc_next);
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return 0;
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}
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static struct fdtbus_syscon *
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fdtbus_get_syscon(int phandle)
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{
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struct fdtbus_syscon *sc;
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LIST_FOREACH(sc, &fdtbus_syscons, sc_next) {
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if (sc->sc_phandle == phandle)
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return sc;
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}
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return NULL;
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}
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struct syscon *
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fdtbus_syscon_acquire(int phandle, const char *prop)
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{
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struct fdtbus_syscon *sc;
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int sc_phandle;
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sc_phandle = fdtbus_get_phandle(phandle, prop);
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if (sc_phandle < 0)
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return NULL;
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sc = fdtbus_get_syscon(sc_phandle);
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if (sc == NULL)
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return NULL;
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return sc->sc_syscon;
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: fdtvar.h,v 1.34 2018/06/12 10:28:55 jmcneill Exp $ */
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/* $NetBSD: fdtvar.h,v 1.35 2018/06/30 12:35:18 jmcneill Exp $ */
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/*-
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* Copyright (c) 2015 Jared D. McNeill <jmcneill@invisible.ca>
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@ -210,6 +210,8 @@ struct fdtbus_mmc_pwrseq_func {
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void (*reset)(device_t);
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};
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struct syscon;
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struct fdt_console {
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int (*match)(int);
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void (*consinit)(struct fdt_attach_args *, u_int);
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@ -256,6 +258,7 @@ int fdtbus_register_pwm_controller(device_t, int,
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const struct fdtbus_pwm_controller_func *);
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int fdtbus_register_mmc_pwrseq(device_t, int,
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const struct fdtbus_mmc_pwrseq_func *);
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int fdtbus_register_syscon(device_t, int, struct syscon *);
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void fdtbus_set_decoderegprop(bool);
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@ -292,6 +295,7 @@ int fdtbus_regulator_set_voltage(struct fdtbus_regulator *,
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u_int, u_int);
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int fdtbus_regulator_get_voltage(struct fdtbus_regulator *,
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u_int *);
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struct syscon * fdtbus_syscon_acquire(int, const char *);
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struct fdtbus_dma *fdtbus_dma_get(int, const char *, void (*)(void *), void *);
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struct fdtbus_dma *fdtbus_dma_get_index(int, u_int, void (*)(void *),
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@ -1,4 +1,4 @@
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# $NetBSD: files.fdt,v 1.33 2018/06/30 10:50:30 jmcneill Exp $
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# $NetBSD: files.fdt,v 1.34 2018/06/30 12:35:18 jmcneill Exp $
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include "external/bsd/libfdt/conf/files.libfdt"
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@ -59,6 +59,7 @@ file dev/fdt/fdt_pwm.c fdtbus
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file dev/fdt/fdt_regulator.c fdtbus
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file dev/fdt/fdt_reset.c fdtbus
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file dev/fdt/fdt_rtc.c fdtbus
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file dev/fdt/fdt_syscon.c fdtbus
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file dev/fdt/fdt_pinctrl.c fdtbus
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device cpus { } : fdtbus
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@ -69,6 +70,10 @@ device mmcpwrseq
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attach mmcpwrseq at fdt
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file dev/fdt/mmc_pwrseq_simple.c mmcpwrseq
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device syscon
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attach syscon at fdt
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file dev/fdt/syscon.c syscon
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device pwmbacklight
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attach pwmbacklight at fdt
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file dev/fdt/pwm_backlight.c pwmbacklight
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@ -0,0 +1,138 @@
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/* $NetBSD: syscon.c,v 1.1 2018/06/30 12:35:18 jmcneill Exp $ */
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/*-
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* Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
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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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: syscon.c,v 1.1 2018/06/30 12:35:18 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/sysctl.h>
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#include <sys/kmem.h>
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#include <sys/gpio.h>
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#include <dev/fdt/fdtvar.h>
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#include <dev/fdt/syscon.h>
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struct syscon_softc {
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device_t sc_dev;
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bus_space_tag_t sc_bst;
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bus_space_handle_t sc_bsh;
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kmutex_t sc_lock;
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struct syscon sc_syscon;
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};
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static int syscon_match(device_t, cfdata_t, void *);
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static void syscon_attach(device_t, device_t, void *);
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static const char *compatible[] = {
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"syscon",
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NULL
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};
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CFATTACH_DECL_NEW(syscon, sizeof(struct syscon_softc),
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syscon_match, syscon_attach, NULL, NULL);
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static void
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syscon_generic_lock(void *priv)
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{
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struct syscon_softc * const sc = priv;
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mutex_enter(&sc->sc_lock);
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}
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static void
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syscon_generic_unlock(void *priv)
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{
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struct syscon_softc * const sc = priv;
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mutex_exit(&sc->sc_lock);
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}
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static uint32_t
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syscon_generic_read_4(void *priv, bus_size_t reg)
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{
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struct syscon_softc * const sc = priv;
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KASSERT(mutex_owned(&sc->sc_lock));
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return bus_space_read_4(sc->sc_bst, sc->sc_bsh, reg);
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}
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static void
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syscon_generic_write_4(void *priv, bus_size_t reg, uint32_t val)
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{
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struct syscon_softc * const sc = priv;
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KASSERT(mutex_owned(&sc->sc_lock));
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bus_space_write_4(sc->sc_bst, sc->sc_bsh, reg, val);
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}
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static int
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syscon_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct fdt_attach_args * const faa = aux;
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return of_match_compatible(faa->faa_phandle, compatible);
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}
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static void
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syscon_attach(device_t parent, device_t self, void *aux)
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{
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struct syscon_softc * const sc = device_private(self);
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struct fdt_attach_args * const faa = aux;
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const int phandle = faa->faa_phandle;
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bus_addr_t addr;
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bus_size_t size;
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if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
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aprint_error(": couldn't get registers\n");
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return;
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}
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sc->sc_dev = self;
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sc->sc_bst = faa->faa_bst;
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if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
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aprint_error(": couldn't map registers\n");
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return;
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}
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mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_VM);
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sc->sc_syscon.priv = sc;
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sc->sc_syscon.lock = syscon_generic_lock;
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sc->sc_syscon.unlock = syscon_generic_unlock;
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sc->sc_syscon.read_4 = syscon_generic_read_4;
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sc->sc_syscon.write_4 = syscon_generic_write_4;
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aprint_naive("\n");
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aprint_normal(": System Controller Registers\n");
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fdtbus_register_syscon(self, phandle, &sc->sc_syscon);
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}
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@ -0,0 +1,54 @@
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/* $NetBSD: syscon.h,v 1.1 2018/06/30 12:35:18 jmcneill Exp $ */
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/*-
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* Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
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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,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#ifndef _FDT_SYSCON_H
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#define _FDT_SYSCON_H
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struct syscon {
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void *priv;
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void (*lock)(void *);
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void (*unlock)(void *);
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uint32_t (*read_4)(void *, bus_size_t);
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void (*write_4)(void *, bus_size_t, uint32_t);
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};
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#define syscon_lock(_syscon) \
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(_syscon)->lock((_syscon)->priv)
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#define syscon_unlock(_syscon) \
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(_syscon)->unlock((_syscon)->priv)
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#define syscon_read_4(_syscon, _reg) \
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(_syscon)->read_4((_syscon)->priv, (_reg))
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#define syscon_write_4(_syscon, _reg, _val) \
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(_syscon)->write_4((_syscon)->priv, (_reg), (_val))
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#endif /* !_FDT_SYSCON_H */
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