xref: /freebsd-11.0-release/sys/arm/at91/uart_cpu_at91usart.c

/*-
 * Copyright (c) 2003 Marcel Moolenaar
 * Copyright (c) 2006 M. Warner Losh
 * 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 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 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.
 */

#include "opt_uart.h"

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/sys/arm/at91/uart_cpu_at91rm9200usart.c 238403 2012-07-12 19:11:37Z imp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>

#include <dev/uart/uart.h>
#include <dev/uart/uart_bus.h>
#include <dev/uart/uart_cpu.h>

#include <arm/at91/at91rm92reg.h>
#include <arm/at91/at91var.h>

bus_space_tag_t uart_bus_space_io;
bus_space_tag_t uart_bus_space_mem;

extern struct uart_class at91_usart_class;
extern struct bus_space at91_bs_tag;

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)
{
	struct uart_class *class;

	class = &at91_usart_class;
	if (class->uc_rclk == 0 && at91_master_clock != 0)
		class->uc_rclk = at91_master_clock;
	di->ops = uart_getops(class);
	di->bas.chan = 0;
	di->bas.bst = &at91_bs_tag;
	/*
	 * XXX: Not pretty, but will work because we map the needed addresses
	 * early.  At least we probed this so that the console will work on
         * all flavors of Atmel we can detect.
	 */
	di->bas.bsh = soc_info.dbgu_base;
	di->baudrate = 115200;
	di->bas.regshft = 0;
	di->bas.rclk = 0;
	di->databits = 8;
	di->stopbits = 1;
	di->parity = UART_PARITY_NONE;
	uart_bus_space_io = &at91_bs_tag;
	uart_bus_space_mem = NULL;
	/* Check the environment for overrides */
	uart_getenv(devtype, di, class);
	return (0);
}