| 0,0 → 1,154 |
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| /* |
| * 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); |
| } |
| } |
| } |
| |
| /** @} |
| */ |