Subversion Repositories HelenOS

Rev

Rev 1896 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1 
/*
2 
 * Copyright (C) 2001-2004 Jakub Jermar
3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
13 
 *   documentation and/or other materials provided with the distribution.
14 
 * - The name of the author may not be used to endorse or promote products
15 
 *   derived from this software without specific prior written permission.
16 
 *
17 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
28 
 
1754 jermar 29 
/** @addtogroup genarch
1702 cejka 30 
 * @{
31 
 */
1754 jermar 32 
/**
1757 jermar 33 
 * @file
1842 jermar 34 
 * @brief   Zilog 8530 serial port / keyboard driver.
1702 cejka 35 
 */
36 
 
1842 jermar 37 
#include <genarch/kbd/z8530.h>
1843 jermar 38 
#include <genarch/kbd/key.h>
1842 jermar 39 
#include <genarch/kbd/scanc.h>
40 
#include <genarch/kbd/scanc_sun.h>
41 
#include <arch/drivers/z8530.h>
1 jermar 42 
#include <arch/interrupt.h>
1875 jermar 43 
#include <arch/drivers/kbd.h>
1 jermar 44 
#include <cpu.h>
45 
#include <arch/asm.h>
46 
#include <arch.h>
508 jermar 47 
#include <typedefs.h>
511 jermar 48 
#include <console/chardev.h>
49 
#include <console/console.h>
576 palkovsky 50 
#include <interrupt.h>
1875 jermar 51 
#include <sysinfo/sysinfo.h>
52 
#include <print.h>
1 jermar 53 
 
670 vana 54 
/*
1842 jermar 55 
 * These codes read from z8530 data register are silently ignored.
895 jermar 56 
 */
1842 jermar 57 
#define IGNORE_CODE 0x7f        /* all keys up */
895 jermar 58 
 
1875 jermar 59 
bool z8530_belongs_to_kernel = true;
60 
 
1842 jermar 61 
static void z8530_suspend(chardev_t *);
62 
static void z8530_resume(chardev_t *);
511 jermar 63 
 
64 
static chardev_operations_t ops = {
1842 jermar 65 
    .suspend = z8530_suspend,
66 
    .resume = z8530_resume,
1896 jermar 67 
    .read = z8530_key_read
511 jermar 68 
};
69 
 
1848 jermar 70 
void z8530_wait(void);
576 palkovsky 71 
 
1474 palkovsky 72 
/** Initialize keyboard and service interrupts using kernel routine */
1842 jermar 73 
void z8530_grab(void)
1 jermar 74 
{
1875 jermar 75 
    z8530_belongs_to_kernel = true;
1474 palkovsky 76 
}
1849 jermar 77 
 
1474 palkovsky 78 
/** Resume the former interrupt vector */
1842 jermar 79 
void z8530_release(void)
1474 palkovsky 80 
{
1875 jermar 81 
    z8530_belongs_to_kernel = false;
1474 palkovsky 82 
}
670 vana 83 
 
1842 jermar 84 
/** Initialize z8530. */
85 
void z8530_init(void)
1474 palkovsky 86 
{
1842 jermar 87 
    chardev_initialize("z8530_kbd", &kbrd, &ops);
511 jermar 88 
    stdin = &kbrd;
1195 jermar 89 
 
1875 jermar 90 
    sysinfo_set_item_val("kbd", NULL, true);
91 
    sysinfo_set_item_val("kbd.irq", NULL, 0);
92 
    sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);
93 
 
1849 jermar 94 
    (void) z8530_read_a(RR8);
95 
 
1875 jermar 96 
    /*
97 
     * Clear any pending TX interrupts or we never manage
98 
     * to set FHC UART interrupt state to idle.
99 
     */
100 
    z8530_write_a(WR0, WR0_TX_IP_RST);
1848 jermar 101 
 
1875 jermar 102 
    z8530_write_a(WR1, WR1_IARCSC);     /* interrupt on all characters */
103 
 
1848 jermar 104 
    /* 8 bits per character and enable receiver */
105 
    z8530_write_a(WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
106 
 
1875 jermar 107 
    z8530_write_a(WR9, WR9_MIE);        /* Master Interrupt Enable. */
1 jermar 108 
}
109 
 
1842 jermar 110 
/** Process z8530 interrupt.
508 jermar 111 
 *
112 
 * @param n Interrupt vector.
1708 jermar 113 
 * @param istate Interrupted state.
508 jermar 114 
 */
1849 jermar 115 
void z8530_interrupt(void)
1 jermar 116 
{
1849 jermar 117 
    z8530_poll();
1 jermar 118 
}
508 jermar 119 
 
895 jermar 120 
/** Wait until the controller reads its data. */
1842 jermar 121 
void z8530_wait(void) {
895 jermar 122 
}
123 
 
511 jermar 124 
/* Called from getc(). */
1842 jermar 125 
void z8530_resume(chardev_t *d)
511 jermar 126 
{
127 
}
128 
 
129 
/* Called from getc(). */
1842 jermar 130 
void z8530_suspend(chardev_t *d)
511 jermar 131 
{
132 
}
878 vana 133 
 
1896 jermar 134 
char z8530_key_read(chardev_t *d)
878 vana 135 
{
136 
    char ch;   
137 
 
894 jermar 138 
    while(!(ch = active_read_buff_read())) {
1780 jermar 139 
        uint8_t x;
1848 jermar 140 
        while (!(z8530_read_a(RR0) & RR0_RCA))
894 jermar 141 
            ;
1848 jermar 142 
        x = z8530_read_a(RR8);
895 jermar 143 
        if (x != IGNORE_CODE) {
144 
            if (x & KEY_RELEASE)
145 
                key_released(x ^ KEY_RELEASE);
146 
            else
147 
                active_read_key_pressed(x);
148 
        }
878 vana 149 
    }
150 
    return ch;
151 
}
895 jermar 152 
 
153 
/** Poll for key press and release events.
154 
 *
155 
 * This function can be used to implement keyboard polling.
156 
 */
1842 jermar 157 
void z8530_poll(void)
895 jermar 158 
{
1780 jermar 159 
    uint8_t x;
895 jermar 160 
 
1848 jermar 161 
    while (z8530_read_a(RR0) & RR0_RCA) {
162 
        x = z8530_read_a(RR8);
895 jermar 163 
        if (x != IGNORE_CODE) {
164 
            if (x & KEY_RELEASE)
165 
                key_released(x ^ KEY_RELEASE);
166 
            else
167 
                key_pressed(x);
168 
        }
169 
    }
170 
}
1702 cejka 171 
 
1754 jermar 172 
/** @}
1702 cejka 173 
 */