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/*-
* Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: uart_cpu_mips_xlr.c,v 1.5 2008-07-16 20:22:39 jayachandranc Exp $
*/
/*
* Skeleton of this file was based on respective code for ARM
* code written by Olivier Houchard.
*/
/*
* XLRMIPS: This file is hacked from arm/...
*/
#include "opt_uart.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <machine/bus.h>
#include <dev/uart/uart.h>
#include <dev/uart/uart_cpu.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
static int xlr_uart_probe(struct uart_bas *bas);
static void xlr_uart_init(struct uart_bas *bas, int, int, int, int);
static void xlr_uart_term(struct uart_bas *bas);
static void xlr_uart_putc(struct uart_bas *bas, int);
static int xlr_uart_poll(struct uart_bas *bas);
static int xlr_uart_getc(struct uart_bas *bas);
struct mtx xlr_uart_mtx; /*UartLock*/
struct uart_ops xlr_uart_ns8250_ops = {
.probe = xlr_uart_probe,
.init = xlr_uart_init,
.term = xlr_uart_term,
.putc = xlr_uart_putc,
.poll = xlr_uart_poll,
.getc = xlr_uart_getc,
};
bus_space_tag_t uart_bus_space_io;
bus_space_tag_t uart_bus_space_mem;
static __inline void xlr_uart_lock(struct mtx *hwmtx)
{
if(!mtx_initialized(hwmtx))
return;
if(!kdb_active && hwmtx != NULL)
mtx_lock_spin(hwmtx);
}
static __inline void xlr_uart_unlock(struct mtx *hwmtx)
{
if(!mtx_initialized(hwmtx))
return;
if(!kdb_active && hwmtx != NULL)
mtx_unlock_spin(hwmtx);
}
static int xlr_uart_probe(struct uart_bas *bas)
{
int res;
xlr_uart_lock(&xlr_uart_mtx);
res = uart_ns8250_ops.probe(bas);
xlr_uart_unlock(&xlr_uart_mtx);
return res;
}
static void xlr_uart_init(struct uart_bas *bas, int baudrate, int databits,
int stopbits, int parity)
{
xlr_uart_lock(&xlr_uart_mtx);
uart_ns8250_ops.init(bas,baudrate,databits,stopbits,parity);
xlr_uart_unlock(&xlr_uart_mtx);
}
static void xlr_uart_term(struct uart_bas *bas)
{
xlr_uart_lock(&xlr_uart_mtx);
uart_ns8250_ops.term(bas);
xlr_uart_unlock(&xlr_uart_mtx);
}
static void xlr_uart_putc(struct uart_bas *bas, int c)
{
xlr_uart_lock(&xlr_uart_mtx);
uart_ns8250_ops.putc(bas,c);
xlr_uart_unlock(&xlr_uart_mtx);
}
static int xlr_uart_poll(struct uart_bas *bas)
{
int res;
xlr_uart_lock(&xlr_uart_mtx);
res = uart_ns8250_ops.poll(bas);
xlr_uart_unlock(&xlr_uart_mtx);
return res;
}
static int xlr_uart_getc(struct uart_bas *bas)
{
return uart_ns8250_ops.getc(bas);
}
int
uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
{
return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
}
int
uart_cpu_getdev(int devtype, struct uart_devinfo *di)
{
di->ops = xlr_uart_ns8250_ops;
di->bas.chan = 0;
di->bas.bst = uart_bus_space_mem;
/* TODO Need to call bus_space_map() here */
di->bas.bsh = 0xbef14000; /* Try with UART0 */
di->bas.regshft = 2;
/* divisor = rclk / (baudrate * 16); */
di->bas.rclk = 66000000;
di->baudrate = 38400;
di->databits = 8;
di->stopbits = 1;
di->parity = UART_PARITY_NONE;
/* TODO: Read env variables for all console parameters */
return (0);
}
static void xlr_uart_mtx_init(void *dummy __unused)
{
mtx_init(&xlr_uart_mtx, "uart lock",NULL,MTX_SPIN);
}
SYSINIT(xlr_init_uart_mtx, SI_SUB_LOCK, SI_ORDER_ANY, xlr_uart_mtx_init, NULL);
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