/*
* 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 Zilog 8530 serial port / keyboard driver.
*/
#include <genarch/kbd/z8530.h>
#include <genarch/kbd/key.h>
#include <genarch/kbd/scanc.h>
#include <genarch/kbd/scanc_sun.h>
#include <arch/drivers/z8530.h>
#include <ddi/irq.h>
#include <arch/interrupt.h>
#include <arch/drivers/kbd.h>
#include <arch/drivers/fhc.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>
#include <sysinfo/sysinfo.h>
#include <print.h>
/*
* These codes read from z8530 data register are silently ignored.
*/
#define IGNORE_CODE 0x7f /* all keys up */
bool z8530_belongs_to_kernel = true;
static void z8530_suspend(chardev_t *);
static void z8530_resume(chardev_t *);
static chardev_operations_t ops = {
.suspend = z8530_suspend,
.resume = z8530_resume,
.read = z8530_key_read
};
void z8530_wait(void);
/** Initialize keyboard and service interrupts using kernel routine */
void z8530_grab(void)
{
z8530_belongs_to_kernel = true;
}
/** Resume the former interrupt vector */
void z8530_release(void)
{
z8530_belongs_to_kernel = false;
}
/** Initialize z8530. */
void z8530_init(void)
{
chardev_initialize("z8530_kbd", &kbrd, &ops);
stdin = &kbrd;
sysinfo_set_item_val("kbd", NULL, true);
sysinfo_set_item_val("kbd.irq", NULL, 0);
sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);
(void) z8530_read_a(RR8);
/*
* Clear any pending TX interrupts or we never manage
* to set FHC UART interrupt state to idle.
*/
z8530_write_a(WR0, WR0_TX_IP_RST);
z8530_write_a(WR1, WR1_IARCSC); /* interrupt on all characters */
/* 8 bits per character and enable receiver */
z8530_write_a(WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
z8530_write_a(WR9, WR9_MIE); /* Master Interrupt Enable. */
}
/** Process z8530 interrupt.
*
* @param n Interrupt vector.
* @param istate Interrupted state.
*/
void z8530_interrupt(void)
{
z8530_poll();
}
/** Wait until the controller reads its data. */
void z8530_wait(void) {
}
/* Called from getc(). */
void z8530_resume(chardev_t *d)
{
}
/* Called from getc(). */
void z8530_suspend(chardev_t *d)
{
}
char z8530_key_read(chardev_t *d)
{
char ch;
while(!(ch = active_read_buff_read())) {
uint8_t x;
while (!(z8530_read_a(RR0) & RR0_RCA))
;
x = z8530_read_a(RR8);
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 z8530_poll(void)
{
uint8_t x;
while (z8530_read_a(RR0) & RR0_RCA) {
x = z8530_read_a(RR8);
if (x != IGNORE_CODE) {
if (x & KEY_RELEASE)
key_released(x ^ KEY_RELEASE);
else
key_pressed(x);
}
}
}
irq_ownership_t z8530_claim(void)
{
return (z8530_read_a(RR0) & RR0_RCA);
}
void z8530_irq_handler(irq_t *irq, void *arg, ...)
{
/*
* So far, we know we got this interrupt through the FHC.
* Since we don't have enough information about the FHC and
* because the interrupt looks like level sensitive,
* we cannot handle it by scheduling one of the level
* interrupt traps. Process the interrupt directly.
*/
if (z8530_belongs_to_kernel)
z8530_interrupt();
else
ipc_irq_send_notif(0);
fhc_clear_interrupt(central_fhc, irq->inr);
}
/** @}
*/