Differential D25725 Diff 74654 sys/riscv/riscv/riscv_syscon.c

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sys/riscv/riscv/riscv_syscon.c

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				/*-
				* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
				*
				* Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
				brUnsubmitted Done Inline Actions this copyright is not needed br: this copyright is not needed
				jrtc27AuthorUnsubmitted Done Inline Actions But aw_syscon is copyright kevans@, which is where most of this code comes from? As in, I copied that file, changed `aw` to `riscv` everywhere, updated `compat_data`, the device description and comments. But it's basically the same code. jrtc27: But aw_syscon is copyright kevans@, which is where most of this code comes from? As in, I…
				brUnsubmitted Done Inline Actions Since you copied then yes, otherwise it looks like a basic FDT driver template br: Since you copied then yes, otherwise it looks like a basic FDT driver template
				* Copyright (c) 2020 Jessica Clarke <jrtc27@FreeBSD.org>
				*
				* 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.
				*/

				/*
				* RISC-V syscon driver. Used as a generic interface by QEMU's virt machine for
				* describing the SiFive test finisher as a power and reset controller.
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/param.h>
				#include <sys/bus.h>
				#include <sys/kernel.h>
				#include <sys/module.h>
				#include <sys/mutex.h>
				#include <sys/rman.h>
				#include <machine/bus.h>

				#include <dev/ofw/openfirm.h>
				#include <dev/ofw/ofw_bus.h>
				#include <dev/ofw/ofw_bus_subr.h>

				#include <dev/extres/syscon/syscon.h>
				#include <dev/extres/syscon/syscon_generic.h>

				static struct ofw_compat_data compat_data[] = {
				{"sifive,test0", 1},
				{"sifive,test1", 1},
				{NULL, 0}
				};

				static int
				riscv_syscon_probe(device_t dev)
				{

				if (!ofw_bus_status_okay(dev))
				return (ENXIO);
				if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
				return (ENXIO);

				device_set_desc(dev, "RISC-V syscon");
				return (BUS_PROBE_DEFAULT);
				}

				static device_method_t riscv_syscon_methods[] = {
				DEVMETHOD(device_probe, riscv_syscon_probe),

				DEVMETHOD_END
				};

				DEFINE_CLASS_1(riscv_syscon, riscv_syscon_driver, riscv_syscon_methods,
				sizeof(struct syscon_generic_softc), syscon_generic_driver);

				static devclass_t riscv_syscon_devclass;
				/* riscv_syscon needs to attach prior to syscon_power */
				EARLY_DRIVER_MODULE(riscv_syscon, simplebus, riscv_syscon_driver,
				riscv_syscon_devclass, 0, 0, BUS_PASS_SCHEDULER + BUS_PASS_ORDER_LAST);
				MODULE_VERSION(riscv_syscon, 1);