[69501] | 1 | /* $Id: ps2mouse.c 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * PC BIOS - ???
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| 4 | */
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| 5 |
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[38699] | 6 | /*
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[96407] | 7 | * Copyright (C) 2006-2022 Oracle and/or its affiliates.
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[38699] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[69498] | 26 | * --------------------------------------------------------------------
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[38699] | 27 | *
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| 28 | * This code is based on:
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| 29 | *
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| 30 | * ROM BIOS for use with Bochs/Plex86/QEMU emulation environment
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| 31 | *
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| 32 | * Copyright (C) 2002 MandrakeSoft S.A.
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| 33 | *
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| 34 | * MandrakeSoft S.A.
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| 35 | * 43, rue d'Aboukir
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| 36 | * 75002 Paris - France
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| 37 | * http://www.linux-mandrake.com/
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| 38 | * http://www.mandrakesoft.com/
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| 39 | *
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| 40 | * This library is free software; you can redistribute it and/or
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| 41 | * modify it under the terms of the GNU Lesser General Public
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| 42 | * License as published by the Free Software Foundation; either
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| 43 | * version 2 of the License, or (at your option) any later version.
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| 44 | *
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| 45 | * This library is distributed in the hope that it will be useful,
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| 46 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 47 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 48 | * Lesser General Public License for more details.
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| 49 | *
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| 50 | * You should have received a copy of the GNU Lesser General Public
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| 51 | * License along with this library; if not, write to the Free Software
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| 52 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 53 | *
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| 54 | */
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| 55 |
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[69501] | 56 | /*
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| 57 | * Oracle LGPL Disclaimer: For the avoidance of doubt, except that if any license choice
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| 58 | * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
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| 59 | * the Lesser General Public License version 2.1 (LGPLv2) at this time for any software where
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| 60 | * a choice of LGPL license versions is made available with the language indicating
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| 61 | * that LGPLv2 or any later version may be used, or where a choice of which version
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| 62 | * of the LGPL is applied is otherwise unspecified.
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| 63 | */
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[38699] | 64 |
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[69501] | 65 |
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[38699] | 66 | #include <stdint.h>
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| 67 | #include "biosint.h"
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| 68 | #include "inlines.h"
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| 69 |
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| 70 |
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| 71 | #if DEBUG_INT15_MS
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| 72 | # define BX_DEBUG_INT15_MS(...) BX_DEBUG(__VA_ARGS__)
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| 73 | #else
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| 74 | # define BX_DEBUG_INT15_MS(...)
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| 75 | #endif
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| 76 |
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| 77 | #if DEBUG_INT74
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| 78 | # define BX_DEBUG_INT74(...) BX_DEBUG(__VA_ARGS__)
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| 79 | #else
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| 80 | # define BX_DEBUG_INT74(...)
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| 81 | #endif
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| 82 |
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| 83 | #if BX_USE_PS2_MOUSE
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| 84 |
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| 85 | static const char panic_msg_keyb_buffer_full[] = "%s: keyboard input buffer full\n";
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| 86 |
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| 87 | uint8_t send_to_mouse_ctrl(uint8_t sendbyte)
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| 88 | {
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[38832] | 89 | BX_DEBUG_INT15_MS("send %02x to mouse:\n", sendbyte);
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[38699] | 90 | // wait for chance to write to ctrl
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[38832] | 91 | if (inb(0x64) & 0x02)
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[38699] | 92 | BX_PANIC(panic_msg_keyb_buffer_full,"sendmouse");
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| 93 | outb(0x64, 0xD4);
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| 94 | outb(0x60, sendbyte);
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| 95 | return(0);
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| 96 | }
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| 97 |
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| 98 |
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| 99 | uint8_t get_mouse_data(uint8_t __far *data)
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| 100 | {
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[59230] | 101 | int retries = 10000; /* ~150ms timeout */
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[38699] | 102 | uint8_t response;
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| 103 |
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[38832] | 104 | while ((inb(0x64) & 0x21) != 0x21 && retries)
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[59230] | 105 | {
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| 106 | /* Wait until the 15us refresh counter toggles. */
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| 107 | response = inb(0x61) & 0x10;
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| 108 | while((inb(0x61) & 0x10) == response)
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| 109 | ;
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[38832] | 110 | --retries;
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[59230] | 111 | }
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[48123] | 112 |
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[38832] | 113 | if (!retries)
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| 114 | return(1);
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| 115 |
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[38699] | 116 | response = inb(0x60);
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| 117 | *data = response;
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| 118 | return(0);
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| 119 | }
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| 120 |
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| 121 | void set_kbd_command_byte(uint8_t command_byte)
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| 122 | {
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| 123 | if (inb(0x64) & 0x02)
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| 124 | BX_PANIC(panic_msg_keyb_buffer_full,"setkbdcomm");
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[48123] | 125 |
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[38699] | 126 | outb(0x64, 0x60); // write command byte
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| 127 | outb(0x60, command_byte);
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| 128 | }
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| 129 |
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| 130 |
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| 131 | void BIOSCALL int74_function(volatile uint16_t make_farcall, volatile uint16_t Z,
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| 132 | volatile uint16_t Y, volatile uint16_t X, volatile uint16_t status)
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| 133 | {
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| 134 | uint16_t ebda_seg=read_word(0x0040,0x000E);
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| 135 | uint8_t in_byte, index, package_count;
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| 136 | uint8_t mouse_flags_1, mouse_flags_2;
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[48123] | 137 |
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[38699] | 138 | BX_DEBUG_INT74("entering int74_function\n");
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| 139 | make_farcall = 0;
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[48123] | 140 |
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[38699] | 141 | in_byte = inb(0x64);
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| 142 | if ( (in_byte & 0x21) != 0x21 ) {
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| 143 | return;
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| 144 | }
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| 145 | in_byte = inb(0x60);
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| 146 | BX_DEBUG_INT74("int74: read byte %02x\n", in_byte);
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[48123] | 147 |
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[38699] | 148 | mouse_flags_1 = read_byte(ebda_seg, 0x0026);
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| 149 | mouse_flags_2 = read_byte(ebda_seg, 0x0027);
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[48123] | 150 |
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[38699] | 151 | if ( (mouse_flags_2 & 0x80) != 0x80 ) {
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| 152 | return;
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| 153 | }
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[48123] | 154 |
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[38699] | 155 | package_count = mouse_flags_2 & 0x07;
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| 156 | index = mouse_flags_1 & 0x07;
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| 157 | write_byte(ebda_seg, 0x28 + index, in_byte);
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[48123] | 158 |
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[38699] | 159 | if ( index >= package_count ) {
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| 160 | BX_DEBUG_INT74("int74_function: make_farcall=1\n");
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| 161 | status = read_byte(ebda_seg, 0x0028 + 0);
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| 162 | X = read_byte(ebda_seg, 0x0028 + 1);
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| 163 | Y = read_byte(ebda_seg, 0x0028 + 2);
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| 164 | Z = 0;
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| 165 | mouse_flags_1 = 0;
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| 166 | // check if far call handler installed
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| 167 | if (mouse_flags_2 & 0x80)
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| 168 | make_farcall = 1;
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| 169 | }
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| 170 | else {
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| 171 | mouse_flags_1++;
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| 172 | }
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| 173 | write_byte(ebda_seg, 0x0026, mouse_flags_1);
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| 174 | }
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| 175 |
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| 176 | void BIOSCALL int15_function_mouse(pusha_regs_t regs, uint16_t ES, uint16_t DS, volatile uint16_t FLAGS)
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| 177 | {
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| 178 | uint16_t ebda_seg=read_word(0x0040,0x000E);
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| 179 | uint8_t mouse_flags_1, mouse_flags_2;
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| 180 | uint16_t mouse_driver_seg;
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| 181 | uint16_t mouse_driver_offset;
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| 182 | uint8_t mouse_cmd;
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| 183 | uint8_t ret, mouse_data1, mouse_data2, mouse_data3;
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| 184 |
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| 185 | BX_DEBUG_INT15_MS("int15 AX=%04x\n",regs.u.r16.ax);
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| 186 |
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| 187 | // Return Codes status in AH
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| 188 | // =========================
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| 189 | // 00: success
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| 190 | // 01: invalid subfunction (AL > 7)
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| 191 | // 02: invalid input value (out of allowable range)
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| 192 | // 03: interface error
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| 193 | // 04: resend command received from mouse controller,
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| 194 | // device driver should attempt command again
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| 195 | // 05: cannot enable mouse, since no far call has been installed
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| 196 | // 80/86: mouse service not implemented
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[48123] | 197 |
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[38699] | 198 | if (regs.u.r8.al > 7) {
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| 199 | BX_DEBUG_INT15_MS("unsupported subfn\n");
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| 200 | // invalid function
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| 201 | SET_CF();
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| 202 | regs.u.r8.ah = 1;
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| 203 | return;
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| 204 | }
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[48123] | 205 |
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[38699] | 206 | // Valid subfn; disable AUX input and IRQ12, assume no error
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| 207 | set_kbd_command_byte(0x65);
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| 208 | CLEAR_CF();
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| 209 | regs.u.r8.ah = 0;
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[48123] | 210 |
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[38699] | 211 | switch (regs.u.r8.al) {
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| 212 | case 0: // Disable/Enable Mouse
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| 213 | BX_DEBUG_INT15_MS("case 0: ");
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| 214 | if (regs.u.r8.bh > 1) {
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| 215 | BX_DEBUG_INT15_MS("INT 15h C2 AL=0, BH=%02x\n", (unsigned) regs.u.r8.bh);
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| 216 | // invalid subfunction
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| 217 | SET_CF();
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| 218 | regs.u.r8.ah = 1;
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| 219 | break;
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| 220 | }
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| 221 | mouse_flags_2 = read_byte(ebda_seg, 0x0027);
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| 222 | if ( (mouse_flags_2 & 0x80) == 0 ) {
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| 223 | BX_DEBUG_INT15_MS("INT 15h C2 Enable/Disable Mouse, no far call handler\n");
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| 224 | SET_CF();
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| 225 | regs.u.r8.ah = 5; // no far call installed
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| 226 | break;
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| 227 | }
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| 228 | if (regs.u.r8.bh == 0) {
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| 229 | BX_DEBUG_INT15_MS("Disable Mouse\n");
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| 230 | mouse_cmd = 0xF5; // disable mouse command
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| 231 | } else {
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| 232 | BX_DEBUG_INT15_MS("Enable Mouse\n");
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| 233 | mouse_cmd = 0xF4; // enable mouse command
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| 234 | }
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[48123] | 235 |
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[38699] | 236 | ret = send_to_mouse_ctrl(mouse_cmd); // disable mouse command
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| 237 | if (ret == 0) {
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| 238 | ret = get_mouse_data(&mouse_data1);
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| 239 | if ( (ret == 0) || (mouse_data1 == 0xFA) ) {
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| 240 | // success
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| 241 | break;
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| 242 | }
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| 243 | }
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[48123] | 244 |
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[38699] | 245 | // interface error
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| 246 | SET_CF();
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| 247 | regs.u.r8.ah = 3;
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| 248 | break;
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[48123] | 249 |
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[38699] | 250 | case 5: // Initialize Mouse
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| 251 | // Valid package sizes are 1 to 8
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| 252 | if ( (regs.u.r8.bh < 1) || (regs.u.r8.bh > 8) ) {
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| 253 | SET_CF();
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| 254 | regs.u.r8.ah = 2; // invalid input
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| 255 | break;
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| 256 | }
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| 257 | mouse_flags_2 = read_byte(ebda_seg, 0x0027);
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| 258 | mouse_flags_2 = (mouse_flags_2 & 0xf8) | (regs.u.r8.bh - 1);
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| 259 | write_byte(ebda_seg, 0x0027, mouse_flags_2);
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| 260 | // fall through!
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[48123] | 261 |
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[38699] | 262 | case 1: // Reset Mouse
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| 263 | BX_DEBUG_INT15_MS("case 1 or 5:\n");
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| 264 | // clear current package byte index
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| 265 | mouse_flags_1 = read_byte(ebda_seg, 0x0026);
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| 266 | mouse_flags_1 = mouse_flags_1 & 0xf8;
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| 267 | write_byte(ebda_seg, 0x0026, mouse_flags_1);
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| 268 | ret = send_to_mouse_ctrl(0xFF); // reset mouse command
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| 269 | if (ret == 0) {
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| 270 | ret = get_mouse_data(&mouse_data3);
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| 271 | // if no mouse attached, it will return RESEND
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| 272 | if (mouse_data3 == 0xfe) {
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| 273 | SET_CF();
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| 274 | regs.u.r8.ah = 4; // resend
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| 275 | break;
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| 276 | }
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| 277 | if (mouse_data3 != 0xfa)
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| 278 | BX_PANIC("Mouse reset returned %02x (should be ack)\n", (unsigned)mouse_data3);
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| 279 | if ( ret == 0 ) {
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| 280 | ret = get_mouse_data(&mouse_data1);
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| 281 | if ( ret == 0 ) {
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| 282 | ret = get_mouse_data(&mouse_data2);
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| 283 | if ( ret == 0 ) {
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| 284 | // success
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| 285 | regs.u.r8.bl = mouse_data1;
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| 286 | regs.u.r8.bh = mouse_data2;
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| 287 | break;
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| 288 | }
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| 289 | }
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| 290 | }
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| 291 | }
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[48123] | 292 |
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[38699] | 293 | // interface error
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| 294 | SET_CF();
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| 295 | regs.u.r8.ah = 3;
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| 296 | break;
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[48123] | 297 |
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[38699] | 298 | case 2: // Set Sample Rate
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| 299 | BX_DEBUG_INT15_MS("case 2:\n");
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| 300 | switch (regs.u.r8.bh) {
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| 301 | case 0: mouse_data1 = 10; break; // 10 reports/sec
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| 302 | case 1: mouse_data1 = 20; break; // 20 reports/sec
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| 303 | case 2: mouse_data1 = 40; break; // 40 reports/sec
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| 304 | case 3: mouse_data1 = 60; break; // 60 reports/sec
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| 305 | case 4: mouse_data1 = 80; break; // 80 reports/sec
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| 306 | case 5: mouse_data1 = 100; break; // 100 reports/sec (default)
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| 307 | case 6: mouse_data1 = 200; break; // 200 reports/sec
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| 308 | default: mouse_data1 = 0;
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| 309 | }
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| 310 | if (mouse_data1 > 0) {
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| 311 | ret = send_to_mouse_ctrl(0xF3); // set sample rate command
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| 312 | if (ret == 0) {
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| 313 | ret = get_mouse_data(&mouse_data2);
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| 314 | ret = send_to_mouse_ctrl(mouse_data1);
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| 315 | ret = get_mouse_data(&mouse_data2);
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| 316 | // success
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| 317 | } else {
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| 318 | // interface error
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| 319 | SET_CF();
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| 320 | regs.u.r8.ah = 3;
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| 321 | }
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| 322 | } else {
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| 323 | // invalid input
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| 324 | SET_CF();
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| 325 | regs.u.r8.ah = 2;
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| 326 | }
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| 327 | break;
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[48123] | 328 |
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[38699] | 329 | case 3: // Set Resolution
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| 330 | BX_DEBUG_INT15_MS("case 3:\n");
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| 331 | // BX:
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| 332 | // 0 = 25 dpi, 1 count per millimeter
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| 333 | // 1 = 50 dpi, 2 counts per millimeter
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| 334 | // 2 = 100 dpi, 4 counts per millimeter
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| 335 | // 3 = 200 dpi, 8 counts per millimeter
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| 336 | if (regs.u.r8.bh < 4) {
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| 337 | ret = send_to_mouse_ctrl(0xE8); // set resolution command
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| 338 | if (ret == 0) {
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| 339 | ret = get_mouse_data(&mouse_data1);
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| 340 | if (mouse_data1 != 0xfa)
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| 341 | BX_PANIC("Mouse status returned %02x (should be ack)\n", (unsigned)mouse_data1);
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| 342 | ret = send_to_mouse_ctrl(regs.u.r8.bh);
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| 343 | ret = get_mouse_data(&mouse_data1);
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| 344 | if (mouse_data1 != 0xfa)
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| 345 | BX_PANIC("Mouse status returned %02x (should be ack)\n", (unsigned)mouse_data1);
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| 346 | // success
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| 347 | } else {
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| 348 | // interface error
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| 349 | SET_CF();
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| 350 | regs.u.r8.ah = 3;
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| 351 | }
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| 352 | } else {
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| 353 | // invalid input
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| 354 | SET_CF();
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| 355 | regs.u.r8.ah = 2;
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| 356 | }
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| 357 | break;
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[48123] | 358 |
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[38699] | 359 | case 4: // Get Device ID
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| 360 | BX_DEBUG_INT15_MS("case 4:\n");
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| 361 | ret = send_to_mouse_ctrl(0xF2); // get mouse ID command
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| 362 | if (ret == 0) {
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| 363 | ret = get_mouse_data(&mouse_data1);
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| 364 | ret = get_mouse_data(&mouse_data2);
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| 365 | regs.u.r8.bh = mouse_data2;
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| 366 | // success
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| 367 | } else {
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| 368 | // interface error
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| 369 | SET_CF();
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| 370 | regs.u.r8.ah = 3;
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| 371 | }
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| 372 | break;
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[48123] | 373 |
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[38699] | 374 | case 6: // Return Status & Set Scaling Factor...
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| 375 | BX_DEBUG_INT15_MS("case 6:\n");
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| 376 | switch (regs.u.r8.bh) {
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| 377 | case 0: // Return Status
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| 378 | ret = send_to_mouse_ctrl(0xE9); // get mouse info command
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| 379 | if (ret == 0) {
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| 380 | ret = get_mouse_data(&mouse_data1);
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| 381 | if (mouse_data1 != 0xfa)
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| 382 | BX_PANIC("Mouse status returned %02x (should be ack)\n", (unsigned)mouse_data1);
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| 383 | if (ret == 0) {
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| 384 | ret = get_mouse_data(&mouse_data1);
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| 385 | if ( ret == 0 ) {
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| 386 | ret = get_mouse_data(&mouse_data2);
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| 387 | if ( ret == 0 ) {
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| 388 | ret = get_mouse_data(&mouse_data3);
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| 389 | if ( ret == 0 ) {
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| 390 | regs.u.r8.bl = mouse_data1;
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| 391 | regs.u.r8.cl = mouse_data2;
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| 392 | regs.u.r8.dl = mouse_data3;
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| 393 | // success
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| 394 | break;
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| 395 | }
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| 396 | }
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| 397 | }
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| 398 | }
|
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| 399 | }
|
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[48123] | 400 |
|
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[38699] | 401 | // interface error
|
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| 402 | SET_CF();
|
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| 403 | regs.u.r8.ah = 3;
|
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| 404 | break;
|
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[48123] | 405 |
|
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[38699] | 406 | case 1: // Set Scaling Factor to 1:1
|
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| 407 | case 2: // Set Scaling Factor to 2:1
|
---|
| 408 | if (regs.u.r8.bh == 1) {
|
---|
| 409 | ret = send_to_mouse_ctrl(0xE6);
|
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| 410 | } else {
|
---|
| 411 | ret = send_to_mouse_ctrl(0xE7);
|
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| 412 | }
|
---|
| 413 | if (ret == 0) {
|
---|
| 414 | get_mouse_data(&mouse_data1);
|
---|
| 415 | ret = (mouse_data1 != 0xFA);
|
---|
| 416 | }
|
---|
| 417 | if (ret != 0) {
|
---|
| 418 | // interface error
|
---|
| 419 | SET_CF();
|
---|
| 420 | regs.u.r8.ah = 3;
|
---|
| 421 | }
|
---|
| 422 | break;
|
---|
[48123] | 423 |
|
---|
[38699] | 424 | default:
|
---|
| 425 | BX_PANIC("INT 15h C2 AL=6, BH=%02x\n", (unsigned) regs.u.r8.bh);
|
---|
| 426 | // invalid subfunction
|
---|
| 427 | SET_CF();
|
---|
| 428 | regs.u.r8.ah = 1;
|
---|
| 429 | }
|
---|
| 430 | break;
|
---|
[48123] | 431 |
|
---|
[38699] | 432 | case 7: // Set Mouse Handler Address
|
---|
| 433 | BX_DEBUG_INT15_MS("case 7:\n");
|
---|
| 434 | mouse_driver_seg = ES;
|
---|
| 435 | mouse_driver_offset = regs.u.r16.bx;
|
---|
| 436 | write_word(ebda_seg, 0x0022, mouse_driver_offset);
|
---|
| 437 | write_word(ebda_seg, 0x0024, mouse_driver_seg);
|
---|
| 438 | mouse_flags_2 = read_byte(ebda_seg, 0x0027);
|
---|
| 439 | if (mouse_driver_offset == 0 && mouse_driver_seg == 0) {
|
---|
| 440 | /* remove handler */
|
---|
| 441 | if ( (mouse_flags_2 & 0x80) != 0 ) {
|
---|
| 442 | mouse_flags_2 &= ~0x80;
|
---|
| 443 | }
|
---|
| 444 | }
|
---|
| 445 | else {
|
---|
| 446 | /* install handler */
|
---|
| 447 | mouse_flags_2 |= 0x80;
|
---|
| 448 | }
|
---|
| 449 | write_byte(ebda_seg, 0x0027, mouse_flags_2);
|
---|
| 450 | break;
|
---|
[48123] | 451 |
|
---|
[38699] | 452 | default:
|
---|
| 453 | BX_PANIC("INT 15h C2 default case entered\n");
|
---|
| 454 | // invalid subfunction
|
---|
| 455 | SET_CF();
|
---|
| 456 | regs.u.r8.ah = 1;
|
---|
| 457 | }
|
---|
| 458 | BX_DEBUG_INT15_MS("returning cf = %u, ah = %02x\n", (unsigned)GET_CF(), (unsigned)regs.u.r8.ah);
|
---|
| 459 | // Re-enable AUX input and IRQ12
|
---|
| 460 | set_kbd_command_byte(0x47);
|
---|
| 461 | }
|
---|
| 462 | #endif // BX_USE_PS2_MOUSE
|
---|