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1 jermar 1 
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1754 jermar 29 
/** @addtogroup genarch
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 * @{
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 */
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/**
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 * @file
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 * @brief   Zilog 8530 serial port / keyboard driver.
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 */
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#include <genarch/kbd/z8530.h>
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#include <genarch/kbd/key.h>
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#include <genarch/kbd/scanc.h>
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#include <genarch/kbd/scanc_sun.h>
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#include <arch/drivers/fhc.h>
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#include <arch/drivers/z8530.h>
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#include <arch/interrupt.h>
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#include <cpu.h>
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#include <arch/asm.h>
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#include <arch.h>
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#include <typedefs.h>
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#include <console/chardev.h>
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#include <console/console.h>
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#include <interrupt.h>
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/*
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 * These codes read from z8530 data register are silently ignored.
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 */
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#define IGNORE_CODE 0x7f        /* all keys up */
895 jermar 56 
 
1842 jermar 57 
static void z8530_suspend(chardev_t *);
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static void z8530_resume(chardev_t *);
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1843 jermar 60 
chardev_t kbrd;
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static chardev_operations_t ops = {
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    .suspend = z8530_suspend,
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    .resume = z8530_resume,
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    .read = key_read
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};
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void z8530_wait(void);
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/** Initialize keyboard and service interrupts using kernel routine */
1842 jermar 70 
void z8530_grab(void)
1 jermar 71 
{
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}
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/** Resume the former interrupt vector */
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void z8530_release(void)
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{
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}
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1842 jermar 79 
/** Initialize z8530. */
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void z8530_init(void)
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{
1842 jermar 82 
    chardev_initialize("z8530_kbd", &kbrd, &ops);
511 jermar 83 
    stdin = &kbrd;
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1849 jermar 85 
    (void) z8530_read_a(RR8);
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1848 jermar 87 
    z8530_write_a(WR1, WR1_IARCSC); /* interrupt on all characters */
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    /* 8 bits per character and enable receiver */
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    z8530_write_a(WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
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    z8530_write_a(WR9, WR9_MIE);    /* Master Interrupt Enable. */
1849 jermar 93 
 
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    /*
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     * We need to initialize the FireHose Controller,
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     * to which is this z8530 attached. Otherwise
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     * interrupts generated by the z8530 would not
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     * be forwarded to the CPU.
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     */
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    fhc_init();
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}
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/** Process z8530 interrupt.
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 *
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 * @param n Interrupt vector.
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 * @param istate Interrupted state.
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 */
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void z8530_interrupt(void)
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{
1849 jermar 110 
    z8530_poll();
1 jermar 111 
}
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/** Wait until the controller reads its data. */
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void z8530_wait(void) {
895 jermar 115 
}
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/* Called from getc(). */
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void z8530_resume(chardev_t *d)
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{
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}
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/* Called from getc(). */
1842 jermar 123 
void z8530_suspend(chardev_t *d)
511 jermar 124 
{
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}
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1843 jermar 127 
char key_read(chardev_t *d)
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{
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    char ch;   
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894 jermar 131 
    while(!(ch = active_read_buff_read())) {
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        uint8_t x;
1848 jermar 133 
        while (!(z8530_read_a(RR0) & RR0_RCA))
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            ;
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        x = z8530_read_a(RR8);
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        if (x != IGNORE_CODE) {
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            if (x & KEY_RELEASE)
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                key_released(x ^ KEY_RELEASE);
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            else
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                active_read_key_pressed(x);
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        }
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    }
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    return ch;
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}
895 jermar 145 
 
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/** Poll for key press and release events.
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 *
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 * This function can be used to implement keyboard polling.
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 */
1842 jermar 150 
void z8530_poll(void)
895 jermar 151 
{
1780 jermar 152 
    uint8_t x;
895 jermar 153 
 
1848 jermar 154 
    while (z8530_read_a(RR0) & RR0_RCA) {
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        x = z8530_read_a(RR8);
895 jermar 156 
        if (x != IGNORE_CODE) {
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            if (x & KEY_RELEASE)
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                key_released(x ^ KEY_RELEASE);
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            else
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                key_pressed(x);
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        }
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    }
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}
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1754 jermar 165 
/** @}
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 */