/*
* 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 port / keyboard driver.
*/
#ifndef KERN_NS16550_H_
#define KERN_NS16550_H_
#include <console/chardev.h>
#include <ipc/irq.h>
extern void ns16550_init(devno_t devno, inr_t inr, uintptr_t vaddr);
extern void ns16550_poll(void);
extern void ns16550_grab(void);
extern void ns16550_release(void);
extern char ns16550_key_read(chardev_t *d);
extern irq_ownership_t ns16550_claim(void);
extern void ns16550_irq_handler(irq_t *irq, void *arg, ...);
#include <arch/types.h>
#ifndef ia64
#include <arch/drivers/kbd.h>
#endif
/* NS16550 registers */
#define RBR_REG 0 /** Receiver Buffer Register. */
#define IER_REG 1 /** Interrupt Enable Register. */
#define IIR_REG 2 /** Interrupt Ident Register (read). */
#define FCR_REG 2 /** FIFO control register (write). */
#define LCR_REG 3 /** Line Control register. */
#define LSR_REG 5 /** Line Status Register. */
#define IER_ERBFI 0x01 /** Enable Receive Buffer Full Interrupt. */
#define LCR_DLAB 0x80 /** Divisor Latch Access bit. */
/** Structure representing the ns16550 device. */
typedef struct {
devno_t devno;
volatile ioport_t io_port; /** Memory mapped registers of the ns16550. */
} ns16550_t;
static inline uint8_t ns16550_rbr_read(ns16550_t *dev)
{
return inb(dev->io_port+RBR_REG);
}
static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v)
{
outb(dev->io_port+RBR_REG,v);
}
static inline uint8_t ns16550_ier_read(ns16550_t *dev)
{
return inb(dev->io_port+IER_REG);
}
static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v)
{
outb(dev->io_port+IER_REG,v);
}
static inline uint8_t ns16550_iir_read(ns16550_t *dev)
{
return inb(dev->io_port+IIR_REG);
}
static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v)
{
outb(dev->io_port+FCR_REG,v);
}
static inline uint8_t ns16550_lcr_read(ns16550_t *dev)
{
return inb(dev->io_port+LCR_REG);
}
static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v)
{
outb(dev->io_port+LCR_REG,v);
}
static inline uint8_t ns16550_lsr_read(ns16550_t *dev)
{
return inb(dev->io_port+LSR_REG);
}
#endif
/** @}
*/