0,0 → 1,154 |
/* |
* 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 NS 16550 serial port / keyboard driver. |
*/ |
|
#include <genarch/kbd/ns16550.h> |
#include <genarch/kbd/key.h> |
#include <genarch/kbd/scanc.h> |
#include <genarch/kbd/scanc_sun.h> |
#include <arch/drivers/ns16550.h> |
#include <arch/interrupt.h> |
#include <cpu.h> |
#include <arch/asm.h> |
#include <arch.h> |
#include <typedefs.h> |
#include <console/chardev.h> |
#include <console/console.h> |
#include <interrupt.h> |
|
#define LSR_DATA_READY 0x01 |
|
/* |
* These codes read from ns16550 data register are silently ignored. |
*/ |
#define IGNORE_CODE 0x7f /* all keys up */ |
|
static void ns16550_suspend(chardev_t *); |
static void ns16550_resume(chardev_t *); |
|
chardev_t kbrd; |
static chardev_operations_t ops = { |
.suspend = ns16550_suspend, |
.resume = ns16550_resume, |
.read = key_read |
}; |
|
void ns16550_interrupt(int n, istate_t *istate); |
void ns16550_wait(void); |
|
/** Initialize keyboard and service interrupts using kernel routine */ |
void ns16550_grab(void) |
{ |
/* TODO */ |
} |
|
/** Resume the former interrupt vector */ |
void ns16550_release(void) |
{ |
/* TODO */ |
} |
|
/** Initialize ns16550. */ |
void ns16550_init(void) |
{ |
ns16550_grab(); |
chardev_initialize("ns16550_kbd", &kbrd, &ops); |
stdin = &kbrd; |
} |
|
/** Process ns16550 interrupt. |
* |
* @param n Interrupt vector. |
* @param istate Interrupted state. |
*/ |
void ns16550_interrupt(int n, istate_t *istate) |
{ |
/* TODO */ |
} |
|
/** Wait until the controller reads its data. */ |
void ns16550_wait(void) { |
} |
|
/* Called from getc(). */ |
void ns16550_resume(chardev_t *d) |
{ |
} |
|
/* Called from getc(). */ |
void ns16550_suspend(chardev_t *d) |
{ |
} |
|
char key_read(chardev_t *d) |
{ |
char ch; |
|
while(!(ch = active_read_buff_read())) { |
uint8_t x; |
while (!(ns16550_lsr_read() & LSR_DATA_READY)) |
; |
x = ns16550_rbr_read(); |
if (x != IGNORE_CODE) { |
if (x & KEY_RELEASE) |
key_released(x ^ KEY_RELEASE); |
else |
active_read_key_pressed(x); |
} |
} |
return ch; |
} |
|
/** Poll for key press and release events. |
* |
* This function can be used to implement keyboard polling. |
*/ |
void ns16550_poll(void) |
{ |
uint8_t x; |
|
while (((x = ns16550_lsr_read() & LSR_DATA_READY))) { |
x = ns16550_rbr_read(); |
if (x != IGNORE_CODE) { |
if (x & KEY_RELEASE) |
key_released(x ^ KEY_RELEASE); |
else |
key_pressed(x); |
} |
} |
} |
|
/** @} |
*/ |