041b2de9cc
Relies on BHND(4) driver. There files contains machine-dependent code for Broadcom MIPS processor and provide UART driver. This is a work in progress; it and the current bhnd code is enough to boot on the ASUS RT-N16 and RT-N53 platforms. Submitted by: Michael Zhilin <mizhka@gmail.com> Differential Revision: https://reviews.freebsd.org/D6251
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*-
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* Copyright (c) 2016 Michael Zhilin <mizhka@gmail.com>
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*
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* 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 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 <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_uart.h"
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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 <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/resource.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 "uart_if.h"
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#include "bhnd_chipc_if.h"
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static int uart_chipc_probe(device_t dev);
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extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;
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static void
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uart_chipc_identify(driver_t *driver, device_t parent)
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{
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struct chipc_capabilities *caps;
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caps = BHND_CHIPC_GET_CAPABILITIES(parent);
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if (caps->num_uarts == 0)
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return;
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/*
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* TODO: add more than one UART
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*/
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BUS_ADD_CHILD(parent, 0, "uart", -1);
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}
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static int
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uart_chipc_probe(device_t dev)
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{
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struct uart_softc *sc;
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struct resource *res;
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int rid;
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rid = 0;
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res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (res == NULL) {
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device_printf(dev, "can't allocate main resource\n");
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return (ENXIO);
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}
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sc = device_get_softc(dev);
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sc->sc_class = &uart_ns8250_class;
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sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
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if (sc->sc_sysdev == NULL) {
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device_printf(dev, "missing sysdev\n");
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return (EINVAL);
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}
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bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
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sc->sc_sysdev->bas.bst = rman_get_bustag(res);
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sc->sc_sysdev->bas.bsh = rman_get_bushandle(res);
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sc->sc_bas.bst = sc->sc_sysdev->bas.bst;
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sc->sc_bas.bsh = sc->sc_sysdev->bas.bsh;
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bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
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/* We use internal SoC clock generator with non-standart freq MHz */
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return (uart_bus_probe(dev, 0, sc->sc_sysdev->bas.rclk, 0, 0));
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}
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static device_method_t uart_chipc_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, uart_chipc_identify),
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DEVMETHOD(device_probe, uart_chipc_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_chipc_driver = {
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uart_driver_name,
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uart_chipc_methods,
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sizeof(struct uart_softc),
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};
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DRIVER_MODULE(uart, bhnd_chipc, uart_chipc_driver, uart_devclass, 0, 0);
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