The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/atheros/uart_cpu_ar933x.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2012 Adrian Chadd <adrian@FreeBSD.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  */
   29 #include "opt_uart.h"
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: stable/12/sys/mips/atheros/uart_cpu_ar933x.c 326259 2017-11-27 15:07:26Z pfg $");
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/bus.h>
   37 
   38 #include <machine/bus.h>
   39 
   40 #include <dev/uart/uart.h>
   41 #include <dev/uart/uart_cpu.h>
   42 
   43 #include <mips/atheros/ar71xxreg.h>
   44 #include <mips/atheros/ar71xx_cpudef.h>
   45 #include <mips/atheros/ar71xx_bus_space_reversed.h>
   46 
   47 #include <mips/atheros/uart_dev_ar933x.h>
   48 
   49 bus_space_tag_t uart_bus_space_io;
   50 bus_space_tag_t uart_bus_space_mem;
   51 
   52 int
   53 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
   54 {
   55         return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
   56 }
   57 
   58 int
   59 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
   60 {
   61         uint64_t freq;
   62 
   63         freq = ar71xx_uart_freq();
   64 
   65         di->ops = uart_getops(&uart_ar933x_class);
   66         di->bas.chan = 0;
   67         di->bas.bst = ar71xx_bus_space_reversed;
   68         di->bas.regshft = 0;    /* We'll do "correct" dword addressing here */
   69         di->bas.rclk = freq;
   70         di->baudrate = 115200;
   71         di->databits = 8;
   72         di->stopbits = 1;
   73 
   74         di->parity = UART_PARITY_NONE;
   75 
   76         uart_bus_space_io = NULL;
   77         uart_bus_space_mem = ar71xx_bus_space_reversed;
   78         di->bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR);
   79         return (0);
   80 }

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