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/*
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/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * Copyright (C) 2001-2006 Jakub Jermar
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 * All rights reserved.
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 * All rights reserved.
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 *
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 *
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 * Redistribution and use in source and binary forms, with or without
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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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 * modification, are permitted provided that the following conditions
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 * are met:
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 * are met:
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#include <interrupt.h>
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#include <interrupt.h>
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#include <sysinfo/sysinfo.h>
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#include <sysinfo/sysinfo.h>
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#define LSR_DATA_READY  0x01
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#define LSR_DATA_READY  0x01
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- 
 
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/** Structure representing the ns16550. */
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static ns16550_t ns16550;
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- 
 
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/** Structure for ns16550's IRQ. */
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static irq_t ns16550_irq;
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/*
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/*
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 * These codes read from ns16550 data register are silently ignored.
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 * These codes read from ns16550 data register are silently ignored.
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 */
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 */
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#define IGNORE_CODE 0x7f        /* all keys up */
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#define IGNORE_CODE 0x7f        /* all keys up */
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void ns16550_release(void)
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void ns16550_release(void)
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{
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{
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    /* TODO */
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    /* TODO */
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}
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}
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/** Initialize ns16550. */
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/** Initialize ns16550.
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 *
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 * @param devno Device number.
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 * @param inr Interrupt number.
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 * @param vaddr Virtual address of device's registers.
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 */
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void ns16550_init(void)
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void ns16550_init(devno_t devno, inr_t inr, uintptr_t vaddr)
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{
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{
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    ns16550_grab();
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    ns16550_grab();
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    chardev_initialize("ns16550_kbd", &kbrd, &ops);
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    chardev_initialize("ns16550_kbd", &kbrd, &ops);
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    stdin = &kbrd;
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    stdin = &kbrd;
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    ns16550.devno = devno;
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    ns16550.reg = (uint8_t *) vaddr;
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    irq_initialize(&ns16550_irq);
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    ns16550_irq.devno = devno;
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    ns16550_irq.inr = inr;
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    ns16550_irq.claim = ns16550_claim;
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    ns16550_irq.handler = ns16550_irq_handler;
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    irq_register(&ns16550_irq);
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    sysinfo_set_item_val("kbd", NULL, true);
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    sysinfo_set_item_val("kbd", NULL, true);
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    sysinfo_set_item_val("kbd.devno", NULL, devno);
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    sysinfo_set_item_val("kbd.irq", NULL, 0);
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    sysinfo_set_item_val("kbd.inr", NULL, inr);
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    sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);
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    sysinfo_set_item_val("kbd.address.virtual", NULL, vaddr);
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    ns16550_ier_write(IER_ERBFI);               /* enable receiver interrupt */
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    ns16550_ier_write(&ns16550, IER_ERBFI);     /* enable receiver interrupt */
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    while (ns16550_lsr_read() & LSR_DATA_READY)
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    while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
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        (void) ns16550_rbr_read();
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        (void) ns16550_rbr_read(&ns16550);
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}
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}
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/** Process ns16550 interrupt.
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/** Process ns16550 interrupt.
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 *
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 *
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 * @param n Interrupt vector.
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 * @param n Interrupt vector.
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{
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{
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    char ch;   
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    char ch;   
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    while(!(ch = active_read_buff_read())) {
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    while(!(ch = active_read_buff_read())) {
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        uint8_t x;
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        uint8_t x;
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        while (!(ns16550_lsr_read() & LSR_DATA_READY))
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        while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY))
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            ;
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            ;
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        x = ns16550_rbr_read();
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        x = ns16550_rbr_read(&ns16550);
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        if (x != IGNORE_CODE) {
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        if (x != IGNORE_CODE) {
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            if (x & KEY_RELEASE)
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            if (x & KEY_RELEASE)
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                key_released(x ^ KEY_RELEASE);
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                key_released(x ^ KEY_RELEASE);
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            else
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            else
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                active_read_key_pressed(x);
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                active_read_key_pressed(x);
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 */
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 */
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void ns16550_poll(void)
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void ns16550_poll(void)
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{
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{
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    uint8_t x;
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    uint8_t x;
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    while (ns16550_lsr_read() & LSR_DATA_READY) {
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    while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
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        x = ns16550_rbr_read();
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        x = ns16550_rbr_read(&ns16550);
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        if (x != IGNORE_CODE) {
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        if (x != IGNORE_CODE) {
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            if (x & KEY_RELEASE)
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            if (x & KEY_RELEASE)
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                key_released(x ^ KEY_RELEASE);
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                key_released(x ^ KEY_RELEASE);
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            else
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            else
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                key_pressed(x);
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                key_pressed(x);