| 0,0 → 1,122 |
|---|
| /* |
| * 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 |
| |
| /** @} |
| */ |