f1ee3e4658
handling. - Extended PWRCTL/PMU APIs to support querying clock frequency during very early boot, prior to bus attach. - Implement generic PMU-based calculation of UART rclk values. - Replaced use of static frequency tables (bcm_socinfo) with runtime-determined values. Approved by: adrian (mentor) Differential Revision: https://reviews.freebsd.org/D7552
82 lines
2.4 KiB
C
82 lines
2.4 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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#include "bcm_machdep.h"
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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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u_int rclk;
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sc = device_get_softc(dev);
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sc->sc_class = &uart_ns8250_class;
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rclk = bcm_get_uart_rclk(bcm_get_platform());
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return (uart_bus_probe(dev, 0, 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_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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