jcs.org
jcs's openbsd hax
openbsd
Add bcmstbreset(4), a driver for the reset controller found on the rpi5.
ok mglocker@
+120
-3
+2
-1
sys/arch/arm64/conf/GENERIC
+2
-1
sys/arch/arm64/conf/GENERIC
···
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# $OpenBSD: GENERIC,v 1.299 2025/08/15 13:35:49 kettenis Exp $
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# $OpenBSD: GENERIC,v 1.300 2025/08/20 12:01:02 kettenis Exp $
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#
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# GENERIC machine description file
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#
···
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sdmmc* at bcmsdhost?
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bcmstbgpio* at fdt? early 1
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bcmstbpinctrl* at fdt? early 1
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bcmstbreset* at fdt? early 1
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bcmtemp* at fdt?
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bcmtmon* at fdt? early 1
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bse* at fdt?
+2
-1
sys/arch/arm64/conf/RAMDISK
+2
-1
sys/arch/arm64/conf/RAMDISK
···
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# $OpenBSD: RAMDISK,v 1.226 2025/08/15 13:35:49 kettenis Exp $
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# $OpenBSD: RAMDISK,v 1.227 2025/08/20 12:01:02 kettenis Exp $
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3
machine arm64
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maxusers 4
···
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sdmmc* at bcmsdhost?
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bcmstbgpio* at fdt? early 1
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bcmstbpinctrl* at fdt? early 1
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bcmstbreset* at fdt? early 1
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bse* at fdt?
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bse* at acpi?
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dwctwo* at fdt?
+111
sys/dev/fdt/bcmstbreset.c
+111
sys/dev/fdt/bcmstbreset.c
···
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/* $OpenBSD: bcmstbreset.c,v 1.1 2025/08/20 12:01:02 kettenis Exp $ */
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/*
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* Copyright (c) 2025 Mark Kettenis <kettenis@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/intr.h>
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#include <machine/bus.h>
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#include <machine/fdt.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_clock.h>
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#include <dev/ofw/fdt.h>
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/* Registers. */
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#define SW_INIT_SET(_bank) (0x00 + (_bank) * 24)
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#define SW_INIT_CLR(_bank) (0x04 + (_bank) * 24)
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#define HREAD4(sc, reg) \
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(bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
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#define HWRITE4(sc, reg, val) \
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bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
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struct bcmstbreset_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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u_int sc_nbanks;
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struct reset_device sc_rd;
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};
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int bcmstbreset_match(struct device *, void *, void *);
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void bcmstbreset_attach(struct device *, struct device *, void *);
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const struct cfattach bcmstbreset_ca = {
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sizeof (struct bcmstbreset_softc),
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bcmstbreset_match, bcmstbreset_attach
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};
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struct cfdriver bcmstbreset_cd = {
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NULL, "bcmstbreset", DV_DULL
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};
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void bcmstbreset_reset(void *, uint32_t *, int);
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int
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bcmstbreset_match(struct device *parent, void *match, void *aux)
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{
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struct fdt_attach_args *faa = aux;
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return OF_is_compatible(faa->fa_node, "brcm,brcmstb-reset");
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}
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void
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bcmstbreset_attach(struct device *parent, struct device *self, void *aux)
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{
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struct bcmstbreset_softc *sc = (struct bcmstbreset_softc *)self;
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struct fdt_attach_args *faa = aux;
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if (faa->fa_nreg < 1) {
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printf(": no registers\n");
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return;
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}
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sc->sc_iot = faa->fa_iot;
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if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
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faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
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printf(": can't map registers\n");
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return;
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}
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sc->sc_nbanks = faa->fa_reg[0].size / 24;
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printf("\n");
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sc->sc_rd.rd_node = faa->fa_node;
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sc->sc_rd.rd_cookie = sc;
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sc->sc_rd.rd_reset = bcmstbreset_reset;
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reset_register(&sc->sc_rd);
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}
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void
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bcmstbreset_reset(void *cookie, uint32_t *cells, int assert)
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{
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struct bcmstbreset_softc *sc = cookie;
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uint32_t bank = cells[0] / 32;;
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uint32_t bit = cells[0] % 32;
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if (bank >= sc->sc_nbanks)
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return;
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if (assert)
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HWRITE4(sc, SW_INIT_SET(bank), 1U << bit);
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else
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HWRITE4(sc, SW_INIT_CLR(bank), 1U << bit);
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}
+5
-1
sys/dev/fdt/files.fdt
+5
-1
sys/dev/fdt/files.fdt
···
1
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# $OpenBSD: files.fdt,v 1.211 2025/08/15 13:35:49 kettenis Exp $
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# $OpenBSD: files.fdt,v 1.212 2025/08/20 12:01:02 kettenis Exp $
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#
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# Config file and device description for machine-independent FDT code.
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# Included by ports that need it.
···
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device bcmstbpinctrl
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attach bcmstbpinctrl at fdt
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file dev/fdt/bcmstbpinctrl.c bcmstbpinctrl
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device bcmstbreset
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attach bcmstbreset at fdt
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file dev/fdt/bcmstbreset.c bcmstbreset
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device bcmtemp
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attach bcmtemp at fdt