/* ps2kbd.c -- Very simple (and limited) PS/2 keyboard simulation
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/* ps2kbd.c -- Very simple (and limited) PS/2 keyboard simulation
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Copyright (C) 2002 Marko Mlinar, markom@opencores.org
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Copyright (C) 2002 Marko Mlinar, markom@opencores.org
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdlib.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <string.h>
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#include <string.h>
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#include "ps2kbd.h"
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#include "ps2kbd.h"
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#include "sim-config.h"
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#include "sim-config.h"
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#include "abstract.h"
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#include "abstract.h"
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#include "sched.h"
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#include "sched.h"
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#include "pic.h"
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/* ASCII to scan code conversion table */
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/* ASCII to scan code conversion table */
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const static struct {
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const static struct {
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/* Whether shift must be pressed */
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/* Whether shift must be pressed */
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unsigned char shift;
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unsigned char shift;
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/* Scan code to be generated */
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/* Scan code to be generated */
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unsigned char code;
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unsigned char code;
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} scan_table [128] = {
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} scan_table [128] = {
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/* 0 - 15 */
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/* 0 - 15 */
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{0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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{0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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{0, 0x0E}, {0, 0x0F}, {0, 0x1C}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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{0, 0x0E}, {0, 0x0F}, {0, 0x1C}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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/* 16 - 31 */
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/* 16 - 31 */
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{0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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{0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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{0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x01}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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{0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x01}, {0, 0x00}, {0, 0x00}, {0, 0x00}, {0, 0x00},
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/* 32 - 47 */
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/* 32 - 47 */
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{0, 0x39}, {1, 0x02}, {1, 0x28}, {1, 0x04}, {1, 0x05}, {1, 0x06}, {1, 0x08}, {0, 0x28},
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{0, 0x39}, {1, 0x02}, {1, 0x28}, {1, 0x04}, {1, 0x05}, {1, 0x06}, {1, 0x08}, {0, 0x28},
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{1, 0x0A}, {1, 0x0B}, {1, 0x09}, {1, 0x0D}, {0, 0x33}, {0, 0x0C}, {0, 0x34}, {0, 0x35},
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{1, 0x0A}, {1, 0x0B}, {1, 0x09}, {1, 0x0D}, {0, 0x33}, {0, 0x0C}, {0, 0x34}, {0, 0x35},
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/* 48 - 63 */
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/* 48 - 63 */
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{0, 0x0B}, {0, 0x02}, {0, 0x03}, {0, 0x04}, {0, 0x05}, {0, 0x06}, {0, 0x07}, {0, 0x08},
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{0, 0x0B}, {0, 0x02}, {0, 0x03}, {0, 0x04}, {0, 0x05}, {0, 0x06}, {0, 0x07}, {0, 0x08},
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{0, 0x09}, {0, 0x0A}, {1, 0x27}, {0, 0x27}, {1, 0x33}, {0, 0x0D}, {1, 0x34}, {1, 0x35},
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{0, 0x09}, {0, 0x0A}, {1, 0x27}, {0, 0x27}, {1, 0x33}, {0, 0x0D}, {1, 0x34}, {1, 0x35},
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/* 64 - 79 */
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/* 64 - 79 */
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{1, 0x03}, {1, 0x1E}, {1, 0x30}, {1, 0x2E}, {1, 0x20}, {1, 0x12}, {1, 0x21}, {1, 0x22},
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{1, 0x03}, {1, 0x1E}, {1, 0x30}, {1, 0x2E}, {1, 0x20}, {1, 0x12}, {1, 0x21}, {1, 0x22},
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{1, 0x23}, {1, 0x17}, {1, 0x24}, {1, 0x25}, {1, 0x26}, {1, 0x32}, {1, 0x31}, {1, 0x18},
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{1, 0x23}, {1, 0x17}, {1, 0x24}, {1, 0x25}, {1, 0x26}, {1, 0x32}, {1, 0x31}, {1, 0x18},
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/* 80 - 95 */
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/* 80 - 95 */
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{1, 0x19}, {1, 0x10}, {1, 0x13}, {1, 0x1F}, {1, 0x14}, {1, 0x16}, {1, 0x2F}, {1, 0x11},
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{1, 0x19}, {1, 0x10}, {1, 0x13}, {1, 0x1F}, {1, 0x14}, {1, 0x16}, {1, 0x2F}, {1, 0x11},
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{1, 0x2D}, {1, 0x15}, {1, 0x2C}, {0, 0x1A}, {0, 0x2B}, {0, 0x1B}, {1, 0x07}, {1, 0x0C},
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{1, 0x2D}, {1, 0x15}, {1, 0x2C}, {0, 0x1A}, {0, 0x2B}, {0, 0x1B}, {1, 0x07}, {1, 0x0C},
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/* 96 - 111 */
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/* 96 - 111 */
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{0, 0x29}, {0, 0x1E}, {0, 0x30}, {0, 0x2E}, {0, 0x20}, {0, 0x12}, {0, 0x21}, {0, 0x22},
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{0, 0x29}, {0, 0x1E}, {0, 0x30}, {0, 0x2E}, {0, 0x20}, {0, 0x12}, {0, 0x21}, {0, 0x22},
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{0, 0x23}, {0, 0x17}, {0, 0x24}, {0, 0x25}, {0, 0x26}, {0, 0x32}, {0, 0x31}, {0, 0x18},
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{0, 0x23}, {0, 0x17}, {0, 0x24}, {0, 0x25}, {0, 0x26}, {0, 0x32}, {0, 0x31}, {0, 0x18},
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/* 112 - 127 */
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/* 112 - 127 */
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{0, 0x19}, {0, 0x10}, {0, 0x13}, {0, 0x1F}, {0, 0x14}, {0, 0x16}, {0, 0x2F}, {0, 0x11},
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{0, 0x19}, {0, 0x10}, {0, 0x13}, {0, 0x1F}, {0, 0x14}, {0, 0x16}, {0, 0x2F}, {0, 0x11},
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{0, 0x2D}, {0, 0x15}, {0, 0x2C}, {1, 0x1A}, {1, 0x2B}, {1, 0x1B}, {1, 0x29}, {0, 0x00}
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{0, 0x2D}, {0, 0x15}, {0, 0x2C}, {1, 0x1A}, {1, 0x2B}, {1, 0x1B}, {1, 0x29}, {0, 0x00}
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};
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};
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/* Temporary buffer to store incoming scan codes */
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/* Temporary buffer to store incoming scan codes */
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static unsigned char kbd_buf[KBD_MAX_BUF] = {0};
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static unsigned char kbd_buf[KBD_MAX_BUF] = {0};
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/* Number of scan codes in buffer */
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/* Number of scan codes in buffer */
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static unsigned long kbd_buf_count = 0;
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static unsigned long kbd_buf_count = 0;
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static unsigned long kbd_buf_head = 0;
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static unsigned long kbd_buf_head = 0;
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static unsigned long kbd_buf_tail = 0;
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static unsigned long kbd_buf_tail = 0;
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/* Input stream */
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/* Input stream */
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static FILE *kbd_rxfs = NULL;
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static FILE *kbd_rxfs = NULL;
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/* Controller Command (write into 0x64) */
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/* Controller Command (write into 0x64) */
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static int kbd_ccmd;
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static int kbd_ccmd;
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/* Keyboard Command (write into 0x60) */
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/* Keyboard Command (write into 0x60) */
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static unsigned char kbd_kcmd;
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static unsigned char kbd_kcmd;
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/* Controller Command Byte */
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/* Controller Command Byte */
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static unsigned char kbd_ccmdbyte;
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static unsigned char kbd_ccmdbyte;
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/* Keyboard response pending */
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/* Keyboard response pending */
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static unsigned long kbd_kresp;
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static unsigned long kbd_kresp;
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/* Keyboard slowdown factor */
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/* Keyboard slowdown factor */
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static long kbd_slowdown;
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static long kbd_slowdown;
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static void kbd_put (unsigned char c)
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static void kbd_put (unsigned char c)
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{
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{
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if (kbd_buf_count >= KBD_MAX_BUF) {
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if (kbd_buf_count >= KBD_MAX_BUF) {
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fprintf (stderr, "WARNING: Keyboard buffer overflow.\n");
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fprintf (stderr, "WARNING: Keyboard buffer overflow.\n");
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} else {
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} else {
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kbd_buf[kbd_buf_head] = c;
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kbd_buf[kbd_buf_head] = c;
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kbd_buf_head = (kbd_buf_head + 1) % KBD_MAX_BUF;
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kbd_buf_head = (kbd_buf_head + 1) % KBD_MAX_BUF;
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kbd_buf_count++;
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kbd_buf_count++;
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}
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}
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}
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}
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/* Decodes ascii code c into multiple scan codes, placed into buf, length is returned */
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/* Decodes ascii code c into multiple scan codes, placed into buf, length is returned */
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static void scan_decode (unsigned char c)
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static void scan_decode (unsigned char c)
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{
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{
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/* Do not handle special characters and extended ascii */
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/* Do not handle special characters and extended ascii */
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if (c >= 128 || !scan_table[c].code)
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if (c >= 128 || !scan_table[c].code)
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return;
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return;
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/* Make shift? */
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/* Make shift? */
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if (scan_table[c].shift) kbd_put (0x2a);
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if (scan_table[c].shift) kbd_put (0x2a);
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/* Make char */
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/* Make char */
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kbd_put (scan_table[c].code);
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kbd_put (scan_table[c].code);
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/* Break char */
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/* Break char */
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kbd_put (scan_table[c].code | 0x80);
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kbd_put (scan_table[c].code | 0x80);
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/* Break shift? */
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/* Break shift? */
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if (scan_table[c].shift) kbd_put (0xaa);
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if (scan_table[c].shift) kbd_put (0xaa);
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}
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}
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/* Write a register */
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/* Write a register */
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void kbd_write8 (unsigned long addr, unsigned long value)
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void kbd_write8 (unsigned long addr, unsigned long value)
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{
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{
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int a = (addr - config.kbd.baseaddr);
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int a = (addr - config.kbd.baseaddr);
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switch (a) {
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switch (a) {
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case KBD_CTRL:
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case KBD_CTRL:
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kbd_ccmd = value & 0xff;
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kbd_ccmd = value & 0xff;
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if (kbd_ccmd == KBD_CCMD_RCB)
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if (kbd_ccmd == KBD_CCMD_RCB)
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kbd_kresp = 0x1;
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kbd_kresp = 0x1;
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if (kbd_ccmd == KBD_CCMD_ST1)
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if (kbd_ccmd == KBD_CCMD_ST1)
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kbd_kresp = 0x1;
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kbd_kresp = 0x1;
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if (kbd_ccmd == KBD_CCMD_ST2)
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if (kbd_ccmd == KBD_CCMD_ST2)
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kbd_kresp = 0x1;
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kbd_kresp = 0x1;
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if (kbd_ccmd == KBD_CCMD_DKI)
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if (kbd_ccmd == KBD_CCMD_DKI)
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kbd_ccmdbyte |= KBD_CCMDBYTE_EN;
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kbd_ccmdbyte |= KBD_CCMDBYTE_EN;
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if (kbd_ccmd == KBD_CCMD_EKI)
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if (kbd_ccmd == KBD_CCMD_EKI)
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kbd_ccmdbyte &= ~KBD_CCMDBYTE_EN;
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kbd_ccmdbyte &= ~KBD_CCMDBYTE_EN;
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if (config.sim.verbose)
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if (config.sim.verbose)
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PRINTF("kbd_write8(%x) %x\n", addr, value);
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PRINTF("kbd_write8(%lx) %lx\n", addr, value);
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break;
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break;
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case KBD_DATA:
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case KBD_DATA:
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if (kbd_ccmd == KBD_CCMD_WCB) {
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if (kbd_ccmd == KBD_CCMD_WCB) {
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kbd_ccmdbyte = value & 0xff;
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kbd_ccmdbyte = value & 0xff;
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kbd_ccmd = 0x00;
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kbd_ccmd = 0x00;
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} else
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} else
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kbd_kcmd = value & 0xff;
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kbd_kcmd = value & 0xff;
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if (kbd_kcmd == KBD_KCMD_DK)
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if (kbd_kcmd == KBD_KCMD_DK)
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kbd_ccmdbyte |= KBD_CCMDBYTE_EN;
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kbd_ccmdbyte |= KBD_CCMDBYTE_EN;
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if (kbd_kcmd == KBD_KCMD_EK)
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if (kbd_kcmd == KBD_KCMD_EK)
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kbd_ccmdbyte &= ~KBD_CCMDBYTE_EN;
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kbd_ccmdbyte &= ~KBD_CCMDBYTE_EN;
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kbd_kresp = 0x1;
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kbd_kresp = 0x1;
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kbd_ccmd = 0x00;
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kbd_ccmd = 0x00;
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if (config.sim.verbose)
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if (config.sim.verbose)
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PRINTF("kbd_write8(%x) %x\n", addr, value);
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PRINTF("kbd_write8(%lx) %lx\n", addr, value);
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break;
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break;
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default:
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default:
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fprintf (stderr, "Write out of keyboard space (0x%08x)!\n", addr);
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fprintf (stderr, "Write out of keyboard space (0x%08lx)!\n", addr);
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runtime.sim.cont_run = 0;
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runtime.sim.cont_run = 0;
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break;
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break;
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}
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}
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}
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}
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/* Read a register */
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/* Read a register */
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unsigned long kbd_read8 (unsigned long addr)
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unsigned long kbd_read8 (unsigned long addr)
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{
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{
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int a = (addr - config.kbd.baseaddr);
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int a = (addr - config.kbd.baseaddr);
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switch (a) {
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switch (a) {
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case KBD_CTRL: {
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case KBD_CTRL: {
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unsigned long c = 0x0;
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unsigned long c = 0x0;
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if (kbd_kresp || kbd_buf_count)
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if (kbd_kresp || kbd_buf_count)
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c |= KBD_STATUS_OBF;
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c |= KBD_STATUS_OBF;
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c |= kbd_ccmdbyte & KBD_CCMDBYTE_SYS;
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c |= kbd_ccmdbyte & KBD_CCMDBYTE_SYS;
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c |= KBD_STATUS_INH;
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c |= KBD_STATUS_INH;
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if (config.sim.verbose)
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if (config.sim.verbose)
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PRINTF("kbd_read8(%x) %x\n", addr, c);
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PRINTF("kbd_read8(%lx) %lx\n", addr, c);
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return c;
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return c;
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}
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}
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case KBD_DATA:
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case KBD_DATA:
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if (kbd_ccmd) {
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if (kbd_ccmd) {
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unsigned long rc;
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unsigned long rc;
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if (kbd_ccmd == KBD_CCMD_RCB)
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if (kbd_ccmd == KBD_CCMD_RCB)
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rc = kbd_ccmdbyte;
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rc = kbd_ccmdbyte;
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if (kbd_ccmd == KBD_CCMD_ST1)
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if (kbd_ccmd == KBD_CCMD_ST1)
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rc = 0x55;
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rc = 0x55;
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if (kbd_ccmd == KBD_CCMD_ST2)
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if (kbd_ccmd == KBD_CCMD_ST2)
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rc = 0x00;
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rc = 0x00;
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kbd_ccmd = 0x00;
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kbd_ccmd = 0x00;
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kbd_kresp = 0x0;
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kbd_kresp = 0x0;
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if (config.sim.verbose)
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if (config.sim.verbose)
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PRINTF("kbd_read8(%x) %x\n", addr, rc);
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PRINTF("kbd_read8(%lx) %lx\n", addr, rc);
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return rc;
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return rc;
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}
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}
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else if (kbd_kresp) {
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else if (kbd_kresp) {
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unsigned long rc;
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unsigned long rc;
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if (kbd_kresp == 0x2) {
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if (kbd_kresp == 0x2) {
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kbd_kresp = 0x0;
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kbd_kresp = 0x0;
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rc = KBD_KRESP_RSTOK;
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rc = KBD_KRESP_RSTOK;
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} else if (kbd_kcmd == KBD_KCMD_RST) {
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} else if (kbd_kcmd == KBD_KCMD_RST) {
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kbd_kresp = 0x2;
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kbd_kresp = 0x2;
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rc = KBD_KRESP_ACK;
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rc = KBD_KRESP_ACK;
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} else if (kbd_kcmd == KBD_KCMD_ECHO) {
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} else if (kbd_kcmd == KBD_KCMD_ECHO) {
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kbd_kresp = 0x0;
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kbd_kresp = 0x0;
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rc = KBD_KRESP_ECHO;
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rc = KBD_KRESP_ECHO;
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} else {
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} else {
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kbd_kresp = 0x0;
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kbd_kresp = 0x0;
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rc = KBD_KRESP_ACK;
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rc = KBD_KRESP_ACK;
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}
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}
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kbd_kcmd = 0x00;
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kbd_kcmd = 0x00;
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if (config.sim.verbose)
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if (config.sim.verbose)
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PRINTF("kbd_read8(%x) %x\n", addr, rc);
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PRINTF("kbd_read8(%lx) %lx\n", addr, rc);
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return rc;
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return rc;
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} else if (kbd_buf_count) {
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} else if (kbd_buf_count) {
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unsigned long c = kbd_buf[kbd_buf_tail];
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unsigned long c = kbd_buf[kbd_buf_tail];
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kbd_buf_tail = (kbd_buf_tail + 1) % KBD_MAX_BUF;
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kbd_buf_tail = (kbd_buf_tail + 1) % KBD_MAX_BUF;
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kbd_buf_count--;
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kbd_buf_count--;
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kbd_kresp = 0x0;
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kbd_kresp = 0x0;
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if (config.sim.verbose)
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if (config.sim.verbose)
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PRINTF("kbd_read8(%x) %x\n", addr, c);
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PRINTF("kbd_read8(%lx) %lx\n", addr, c);
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return c;
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return c;
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}
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}
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kbd_kresp = 0x0;
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kbd_kresp = 0x0;
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if (config.sim.verbose)
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if (config.sim.verbose)
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PRINTF("kbd_read8(%x) fifo empty\n", addr);
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PRINTF("kbd_read8(%lx) fifo empty\n", addr);
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return 0;
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return 0;
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default:
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default:
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fprintf (stderr, "Read out of keyboard space (0x%08x)!\n", addr);
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fprintf (stderr, "Read out of keyboard space (0x%08lx)!\n", addr);
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runtime.sim.cont_run = 0;
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runtime.sim.cont_run = 0;
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return 0;
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return 0;
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}
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}
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}
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}
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/* Simulation hook. Must be called every couple of clock cycles to simulate incomming data. */
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/* Simulation hook. Must be called every couple of clock cycles to simulate incomming data. */
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void kbd_job(int param)
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void kbd_job(int param)
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{
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{
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int c;
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int c;
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int kbd_int = 0;
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int kbd_int = 0;
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/* Check if there is something waiting, and decode it into kdb_buf */
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/* Check if there is something waiting, and decode it into kdb_buf */
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if((c = fgetc(kbd_rxfs)) != EOF) {
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if((c = fgetc(kbd_rxfs)) != EOF) {
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scan_decode (c);
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scan_decode (c);
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}
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}
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kbd_int = kbd_kresp || kbd_buf_count;
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kbd_int = kbd_kresp || kbd_buf_count;
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kbd_int = kbd_kresp || kbd_buf_count ? kbd_ccmdbyte & KBD_CCMDBYTE_INT : 0;
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kbd_int = kbd_kresp || kbd_buf_count ? kbd_ccmdbyte & KBD_CCMDBYTE_INT : 0;
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if (config.sim.verbose && kbd_int)
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if (config.sim.verbose && kbd_int)
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PRINTF("Keyboard Interrupt.... kbd_kresp %x kbd_buf_count %x \n", kbd_kresp, kbd_buf_count);
|
PRINTF("Keyboard Interrupt.... kbd_kresp %lx kbd_buf_count %lx \n",
|
|
kbd_kresp, kbd_buf_count);
|
if (kbd_int) report_interrupt(config.kbd.irq);
|
if (kbd_int) report_interrupt(config.kbd.irq);
|
SCHED_ADD(kbd_job, 0, runtime.sim.cycles + kbd_slowdown);
|
SCHED_ADD(kbd_job, 0, runtime.sim.cycles + kbd_slowdown);
|
}
|
}
|
|
|
/* Reset all VGAs */
|
/* Reset all VGAs */
|
void kbd_reset ()
|
void kbd_reset ()
|
{
|
{
|
if (config.kbd.enabled) {
|
if (config.kbd.enabled) {
|
kbd_buf_count = 0;
|
kbd_buf_count = 0;
|
kbd_buf_head = 0;
|
kbd_buf_head = 0;
|
kbd_buf_tail = 0;
|
kbd_buf_tail = 0;
|
kbd_kresp = 0x0;
|
kbd_kresp = 0x0;
|
kbd_ccmdbyte = 0x65; /* We reset into default normal operation. */
|
kbd_ccmdbyte = 0x65; /* We reset into default normal operation. */
|
register_memoryarea(config.kbd.baseaddr, KBD_SPACE, 1, 0, kbd_read8, kbd_write8);
|
register_memoryarea(config.kbd.baseaddr, KBD_SPACE, 1, 0, kbd_read8, kbd_write8);
|
|
|
if (!(kbd_rxfs = fopen(config.kbd.rxfile, "r"))
|
if (!(kbd_rxfs = fopen(config.kbd.rxfile, "r"))
|
&& !(kbd_rxfs = fopen(config.kbd.rxfile, "r+"))) {
|
&& !(kbd_rxfs = fopen(config.kbd.rxfile, "r+"))) {
|
fprintf (stderr, "WARNING: Keyboard has problems with RX file stream.\n");
|
fprintf (stderr, "WARNING: Keyboard has problems with RX file stream.\n");
|
config.kbd.enabled = 0;
|
config.kbd.enabled = 0;
|
}
|
}
|
kbd_slowdown = (long) ((config.sim.system_kfreq * 1000.) / KBD_BAUD_RATE);
|
kbd_slowdown = (long) ((config.sim.system_kfreq * 1000.) / KBD_BAUD_RATE);
|
if (kbd_slowdown <= 0) kbd_slowdown = 1;
|
if (kbd_slowdown <= 0) kbd_slowdown = 1;
|
if (config.kbd.enabled) SCHED_ADD(kbd_job, 0, runtime.sim.cycles + kbd_slowdown);
|
if (config.kbd.enabled) SCHED_ADD(kbd_job, 0, runtime.sim.cycles + kbd_slowdown);
|
}
|
}
|
}
|
}
|
|
|
|
|
void kbd_info()
|
void kbd_info()
|
{
|
{
|
PRINTF("kbd_kcmd: %x\n", kbd_kcmd);
|
PRINTF("kbd_kcmd: %x\n", kbd_kcmd);
|
PRINTF("kbd_ccmd: %x\n", kbd_ccmd);
|
PRINTF("kbd_ccmd: %x\n", kbd_ccmd);
|
PRINTF("kbd_ccmdbyte: %x\n", kbd_ccmdbyte);
|
PRINTF("kbd_ccmdbyte: %x\n", kbd_ccmdbyte);
|
PRINTF("kbd_kresp: %x\n", kbd_kresp);
|
PRINTF("kbd_kresp: %lx\n", kbd_kresp);
|
PRINTF("kbd_buf_count: %x\n", kbd_buf_count);
|
PRINTF("kbd_buf_count: %lx\n", kbd_buf_count);
|
}
|
}
|
|
|
