/*
* Copyright (c) 2001-2004 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/** @addtogroup genarch
* @{
*/
/**
* @file
* @brief Headers for NS 16550 serial controller.
*/
#ifndef KERN_NS16550_H_
#define KERN_NS16550_H_
#include <ddi/irq.h>
#include <arch/types.h>
#include <console/chardev.h>
#define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */
#define LCR_DLAB 0x80 /** Divisor Latch Access bit. */
#define MCR_OUT2 0x08 /** OUT2. */
/** NS16550 registers. */
typedef struct {
ioport8_t rbr; /**< Receiver Buffer Register. */
ioport8_t ier; /**< Interrupt Enable Register. */
union {
ioport8_t iir; /**< Interrupt Ident Register (read). */
ioport8_t fcr; /**< FIFO control register (write). */
} __attribute__ ((packed));
ioport8_t lcr; /**< Line Control register. */
ioport8_t mcr; /**< Modem Control Register. */
ioport8_t lsr; /**< Line Status Register. */
} __attribute__ ((packed)) ns16550_t;
/** Structure representing the ns16550 device. */
typedef struct {
devno_t devno;
ns16550_t *ns16550;
irq_t irq;
indev_t kbrdin;
} ns16550_instance_t;
extern indev_t *ns16550_init(ns16550_t *, devno_t, inr_t, cir_t, void *);
#endif
/** @}
*/