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c8b472aa4b
Add a variant of the existing dwmmc driver, and enable it in the GENERIC kernel. Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D44026
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright 2017 Emmanuel Vadot <manu@freebsd.org>
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* Copyright (c) 2024 The FreeBSD Foundation
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*
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* Portions of this software were developed by Mitchell Horne
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* <mhorne@FreeBSD.org> under sponsorship from the FreeBSD Foundation.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/queue.h>
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#include <sys/taskqueue.h>
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#include <machine/bus.h>
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#include <dev/mmc/bridge.h>
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#include <dev/mmc/mmc_fdt_helpers.h>
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#include <dev/mmc/host/dwmmc_var.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include "opt_mmccam.h"
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enum dwmmc_type {
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DWMMC_GENERIC = 1,
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DWMMC_JH7110
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};
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static struct ofw_compat_data compat_data[] = {
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{"snps,dw-mshc", DWMMC_GENERIC},
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{"starfive,jh7110-mmc", DWMMC_JH7110},
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{NULL, 0}
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};
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static int dwmmc_starfive_update_ios(struct dwmmc_softc *sc,
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struct mmc_ios *ios)
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{
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int err;
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if (ios->clock != 0 && ios->clock != sc->bus_hz) {
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err = clk_set_freq(sc->ciu, ios->clock, CLK_SET_ROUND_DOWN);
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if (err != 0) {
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printf("%s, Failed to set freq for ciu clock\n",
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__func__);
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return (err);
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}
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sc->bus_hz = ios->clock;
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}
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return (0);
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}
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static int
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starfive_dwmmc_probe(device_t dev)
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{
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phandle_t node;
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int type;
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
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if (type == 0)
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return (ENXIO);
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/*
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* If we matched the generic compat string, check the top-level board
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* compatible, to ensure we should actually use the starfive driver.
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*/
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if (type == DWMMC_GENERIC) {
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node = OF_finddevice("/");
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if (!ofw_bus_node_is_compatible(node, "starfive,jh7110"))
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return (ENXIO);
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}
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device_set_desc(dev, "Synopsys DesignWare Mobile Storage "
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"Host Controller (StarFive)");
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return (BUS_PROBE_VENDOR);
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}
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static int
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starfive_dwmmc_attach(device_t dev)
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{
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struct dwmmc_softc *sc;
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sc = device_get_softc(dev);
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sc->update_ios = &dwmmc_starfive_update_ios;
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return (dwmmc_attach(dev));
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}
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static device_method_t starfive_dwmmc_methods[] = {
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/* bus interface */
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DEVMETHOD(device_probe, starfive_dwmmc_probe),
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DEVMETHOD(device_attach, starfive_dwmmc_attach),
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DEVMETHOD(device_detach, dwmmc_detach),
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DEVMETHOD_END
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};
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DEFINE_CLASS_1(starfive_dwmmc, starfive_dwmmc_driver, starfive_dwmmc_methods,
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sizeof(struct dwmmc_softc), dwmmc_driver);
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DRIVER_MODULE(starfive_dwmmc, simplebus, starfive_dwmmc_driver, 0, 0);
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#ifndef MMCCAM
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MMC_DECLARE_BRIDGE(starfive_dwmmc);
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#endif
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