1f40866feb
Also adds fixups and cleanups: - apply the child's mode/speed - implement suspend/resume support - use RF_SHAREABLE interrupts - use bus_delayed_attach_children since the transfer can use interrupts - add support for newly added spibus features (cs_delay and flags) Operation tested on Broadwell (Wildcat Point) MacBookPro12,1. Attachment also tested on Kaby Lake (Sunrise Point) Pixelbook. Reviewed by: wulf MFC after: 1 month Differential revision: https://reviews.freebsd.org/D29249
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 Val Packett <val@packett.cool>
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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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#include "opt_acpi.h"
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/proc.h>
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#include <sys/rman.h>
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#include <dev/intel/spi.h>
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#include "spibus_if.h"
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static const struct intelspi_acpi_device {
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const char *hid;
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enum intelspi_vers vers;
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} intelspi_acpi_devices[] = {
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{ "80860F0E", SPI_BAYTRAIL },
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{ "8086228E", SPI_BRASWELL },
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};
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static char *intelspi_ids[] = { "80860F0E", "8086228E", NULL };
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static int
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intelspi_acpi_probe(device_t dev)
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{
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struct intelspi_softc *sc = device_get_softc(dev);
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char *hid;
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int i;
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if (acpi_disabled("spi"))
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return (ENXIO);
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if (ACPI_ID_PROBE(device_get_parent(dev), dev, intelspi_ids, &hid) > 0)
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return (ENXIO);
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for (i = 0; i < nitems(intelspi_acpi_devices); i++) {
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if (strcmp(intelspi_acpi_devices[i].hid, hid) == 0) {
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sc->sc_vers = intelspi_acpi_devices[i].vers;
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sc->sc_handle = acpi_get_handle(dev);
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device_set_desc(dev, intelspi_infos[sc->sc_vers].desc);
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return (BUS_PROBE_DEFAULT);
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}
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}
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return (ENXIO);
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}
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static int
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intelspi_acpi_attach(device_t dev)
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{
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struct intelspi_softc *sc = device_get_softc(dev);
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sc->sc_mem_rid = 0;
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sc->sc_irq_rid = 0;
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return (intelspi_attach(dev));
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}
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static device_method_t intelspi_acpi_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, intelspi_acpi_probe),
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DEVMETHOD(device_attach, intelspi_acpi_attach),
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DEVMETHOD(device_detach, intelspi_detach),
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DEVMETHOD(device_suspend, intelspi_suspend),
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DEVMETHOD(device_resume, intelspi_resume),
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/* SPI interface */
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DEVMETHOD(spibus_transfer, intelspi_transfer),
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DEVMETHOD_END
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};
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static driver_t intelspi_acpi_driver = {
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"spi",
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intelspi_acpi_methods,
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sizeof(struct intelspi_softc),
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};
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DRIVER_MODULE(intelspi, acpi, intelspi_acpi_driver, 0, 0);
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MODULE_DEPEND(intelspi, acpi, 1, 1, 1);
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MODULE_DEPEND(intelspi, spibus, 1, 1, 1);
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ACPI_PNP_INFO(intelspi_ids);
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