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_ar71xx.c

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    1 /*-
    2  * Copyright (c) 2009 Oleksandr Tymoshenko
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 #include "opt_uart.h"
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: stable/8/sys/mips/atheros/uart_cpu_ar71xx.c 215938 2010-11-27 12:26:40Z jchandra $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/bus.h>
   35 
   36 #include <machine/bus.h>
   37 
   38 #include <dev/uart/uart.h>
   39 #include <dev/uart/uart_cpu.h>
   40 
   41 #include <mips/atheros/ar71xxreg.h>
   42 #include <mips/atheros/ar71xx_cpudef.h>
   43 #include <mips/atheros/ar71xx_bus_space_reversed.h>
   44 
   45 bus_space_tag_t uart_bus_space_io;
   46 bus_space_tag_t uart_bus_space_mem;
   47 
   48 int
   49 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
   50 {
   51         return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
   52 }
   53 
   54 int
   55 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
   56 {
   57         uint64_t freq;
   58 
   59         freq = ar71xx_ahb_freq();
   60 
   61         di->ops = uart_getops(&uart_ns8250_class);
   62         di->bas.chan = 0;
   63         di->bas.bst = ar71xx_bus_space_reversed;
   64         di->bas.regshft = 2;
   65         di->bas.rclk = freq;
   66         di->baudrate = 115200;
   67         di->databits = 8;
   68         di->stopbits = 1;
   69 
   70         di->parity = UART_PARITY_NONE;
   71 
   72         uart_bus_space_io = NULL;
   73         uart_bus_space_mem = ar71xx_bus_space_reversed;
   74         di->bas.bsh = MIPS_PHYS_TO_KSEG1(AR71XX_UART_ADDR);
   75         return (0);
   76 }

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