af3dc4a7ca
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2006 Benno Rice. 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, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <dev/pci/pcivar.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_bus.h>
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#include <dev/uart/uart_cpu.h>
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#include <dev/ic/ns16550.h>
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#include <arm/xscale/pxa/pxavar.h>
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#include <arm/xscale/pxa/pxareg.h>
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#include "uart_if.h"
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#define PXA_UART_UUE 0x40 /* UART Unit Enable */
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static int uart_pxa_probe(device_t dev);
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static device_method_t uart_pxa_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, uart_pxa_probe),
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DEVMETHOD(device_attach, uart_bus_attach),
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DEVMETHOD(device_detach, uart_bus_detach),
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{ 0, 0 }
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};
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static driver_t uart_pxa_driver = {
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uart_driver_name,
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uart_pxa_methods,
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sizeof(struct uart_softc),
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};
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static int
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uart_pxa_probe(device_t dev)
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{
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bus_space_handle_t base;
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struct uart_softc *sc;
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base = (bus_space_handle_t)pxa_get_base(dev);
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#ifdef QEMU_WORKAROUNDS
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/*
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* QEMU really exposes only the first uart unless
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* you specify several of them in the configuration.
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* Otherwise all the rest of UARTs stay unconnected,
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* which causes problems in the ns16550 attach routine.
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* Unfortunately, even if you provide qemu with 4 uarts
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* on the command line, it has a bug where it segfaults
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* trying to enable bluetooth on the HWUART. So we just
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* allow the FFUART to be attached.
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* Also, don't check the UUE (UART Unit Enable) bit, as
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* the gumstix bootloader doesn't set it.
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*/
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if (base != PXA2X0_FFUART_BASE)
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return (ENXIO);
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#else
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/* Check to see if the enable bit's on. */
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if ((bus_space_read_4(obio_tag, base,
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(REG_IER << 2)) & PXA_UART_UUE) == 0)
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return (ENXIO);
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#endif
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sc = device_get_softc(dev);
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sc->sc_class = &uart_ns8250_class;
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return(uart_bus_probe(dev, 2, 0, PXA2X0_COM_FREQ, 0, 0));
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}
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DRIVER_MODULE(uart, pxa, uart_pxa_driver, uart_devclass, 0, 0);
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