613 lines
18 KiB
C
613 lines
18 KiB
C
/*
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* QEMU PS/2 keyboard/mouse emulation
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "ps2.h"
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#include "console.h"
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/* debug PC keyboard */
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//#define DEBUG_KBD
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/* debug PC keyboard : only mouse */
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//#define DEBUG_MOUSE
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/* Keyboard Commands */
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#define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
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#define KBD_CMD_ECHO 0xEE
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#define KBD_CMD_SCANCODE 0xF0 /* Get/set scancode set */
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#define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */
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#define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
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#define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
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#define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */
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#define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */
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#define KBD_CMD_RESET 0xFF /* Reset */
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/* Keyboard Replies */
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#define KBD_REPLY_POR 0xAA /* Power on reset */
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#define KBD_REPLY_ID 0xAB /* Keyboard ID */
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#define KBD_REPLY_ACK 0xFA /* Command ACK */
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#define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
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/* Mouse Commands */
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#define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */
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#define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */
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#define AUX_SET_RES 0xE8 /* Set resolution */
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#define AUX_GET_SCALE 0xE9 /* Get scaling factor */
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#define AUX_SET_STREAM 0xEA /* Set stream mode */
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#define AUX_POLL 0xEB /* Poll */
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#define AUX_RESET_WRAP 0xEC /* Reset wrap mode */
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#define AUX_SET_WRAP 0xEE /* Set wrap mode */
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#define AUX_SET_REMOTE 0xF0 /* Set remote mode */
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#define AUX_GET_TYPE 0xF2 /* Get type */
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#define AUX_SET_SAMPLE 0xF3 /* Set sample rate */
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#define AUX_ENABLE_DEV 0xF4 /* Enable aux device */
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#define AUX_DISABLE_DEV 0xF5 /* Disable aux device */
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#define AUX_SET_DEFAULT 0xF6
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#define AUX_RESET 0xFF /* Reset aux device */
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#define AUX_ACK 0xFA /* Command byte ACK. */
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#define MOUSE_STATUS_REMOTE 0x40
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#define MOUSE_STATUS_ENABLED 0x20
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#define MOUSE_STATUS_SCALE21 0x10
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#define PS2_QUEUE_SIZE 256
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typedef struct {
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uint8_t data[PS2_QUEUE_SIZE];
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int rptr, wptr, count;
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} PS2Queue;
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typedef struct {
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PS2Queue queue;
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int32_t write_cmd;
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void (*update_irq)(void *, int);
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void *update_arg;
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} PS2State;
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typedef struct {
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PS2State common;
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int scan_enabled;
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/* Qemu uses translated PC scancodes internally. To avoid multiple
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conversions we do the translation (if any) in the PS/2 emulation
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not the keyboard controller. */
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int translate;
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int scancode_set; /* 1=XT, 2=AT, 3=PS/2 */
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} PS2KbdState;
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typedef struct {
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PS2State common;
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uint8_t mouse_status;
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uint8_t mouse_resolution;
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uint8_t mouse_sample_rate;
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uint8_t mouse_wrap;
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uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */
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uint8_t mouse_detect_state;
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int mouse_dx; /* current values, needed for 'poll' mode */
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int mouse_dy;
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int mouse_dz;
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uint8_t mouse_buttons;
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} PS2MouseState;
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/* Table to convert from PC scancodes to raw scancodes. */
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static const unsigned char ps2_raw_keycode[128] = {
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0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
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21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
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35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
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50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
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11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
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114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
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71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
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19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
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};
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void ps2_queue(void *opaque, int b)
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{
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PS2State *s = (PS2State *)opaque;
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PS2Queue *q = &s->queue;
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if (q->count >= PS2_QUEUE_SIZE)
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return;
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q->data[q->wptr] = b;
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if (++q->wptr == PS2_QUEUE_SIZE)
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q->wptr = 0;
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q->count++;
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s->update_irq(s->update_arg, 1);
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}
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/*
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keycode is expressed as follow:
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bit 7 - 0 key pressed, 1 = key released
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bits 6-0 - translated scancode set 2
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*/
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static void ps2_put_keycode(void *opaque, int keycode)
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{
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PS2KbdState *s = opaque;
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/* XXX: add support for scancode sets 1 and 3 */
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if (!s->translate && keycode < 0xe0 && s->scancode_set == 2)
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{
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if (keycode & 0x80)
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ps2_queue(&s->common, 0xf0);
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keycode = ps2_raw_keycode[keycode & 0x7f];
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}
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ps2_queue(&s->common, keycode);
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}
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uint32_t ps2_read_data(void *opaque)
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{
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PS2State *s = (PS2State *)opaque;
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PS2Queue *q;
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int val, index;
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q = &s->queue;
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if (q->count == 0) {
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/* NOTE: if no data left, we return the last keyboard one
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(needed for EMM386) */
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/* XXX: need a timer to do things correctly */
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index = q->rptr - 1;
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if (index < 0)
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index = PS2_QUEUE_SIZE - 1;
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val = q->data[index];
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} else {
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val = q->data[q->rptr];
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if (++q->rptr == PS2_QUEUE_SIZE)
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q->rptr = 0;
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q->count--;
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/* reading deasserts IRQ */
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s->update_irq(s->update_arg, 0);
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/* reassert IRQs if data left */
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s->update_irq(s->update_arg, q->count != 0);
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}
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return val;
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}
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static void ps2_reset_keyboard(PS2KbdState *s)
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{
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s->scan_enabled = 1;
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s->scancode_set = 2;
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}
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void ps2_write_keyboard(void *opaque, int val)
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{
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PS2KbdState *s = (PS2KbdState *)opaque;
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switch(s->common.write_cmd) {
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default:
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case -1:
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switch(val) {
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case 0x00:
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ps2_queue(&s->common, KBD_REPLY_ACK);
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break;
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case 0x05:
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ps2_queue(&s->common, KBD_REPLY_RESEND);
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break;
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case KBD_CMD_GET_ID:
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ps2_queue(&s->common, KBD_REPLY_ACK);
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/* We emulate a MF2 AT keyboard here */
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ps2_queue(&s->common, KBD_REPLY_ID);
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if (s->translate)
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ps2_queue(&s->common, 0x41);
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else
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ps2_queue(&s->common, 0x83);
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break;
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case KBD_CMD_ECHO:
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ps2_queue(&s->common, KBD_CMD_ECHO);
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break;
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case KBD_CMD_ENABLE:
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s->scan_enabled = 1;
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ps2_queue(&s->common, KBD_REPLY_ACK);
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break;
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case KBD_CMD_SCANCODE:
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case KBD_CMD_SET_LEDS:
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case KBD_CMD_SET_RATE:
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s->common.write_cmd = val;
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ps2_queue(&s->common, KBD_REPLY_ACK);
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break;
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case KBD_CMD_RESET_DISABLE:
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ps2_reset_keyboard(s);
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s->scan_enabled = 0;
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ps2_queue(&s->common, KBD_REPLY_ACK);
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break;
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case KBD_CMD_RESET_ENABLE:
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ps2_reset_keyboard(s);
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s->scan_enabled = 1;
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ps2_queue(&s->common, KBD_REPLY_ACK);
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break;
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case KBD_CMD_RESET:
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ps2_reset_keyboard(s);
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ps2_queue(&s->common, KBD_REPLY_ACK);
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ps2_queue(&s->common, KBD_REPLY_POR);
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break;
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default:
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ps2_queue(&s->common, KBD_REPLY_ACK);
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break;
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}
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break;
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case KBD_CMD_SCANCODE:
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if (val == 0) {
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if (s->scancode_set == 1)
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ps2_put_keycode(s, 0x43);
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else if (s->scancode_set == 2)
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ps2_put_keycode(s, 0x41);
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else if (s->scancode_set == 3)
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ps2_put_keycode(s, 0x3f);
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} else {
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if (val >= 1 && val <= 3)
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s->scancode_set = val;
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ps2_queue(&s->common, KBD_REPLY_ACK);
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}
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s->common.write_cmd = -1;
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break;
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case KBD_CMD_SET_LEDS:
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ps2_queue(&s->common, KBD_REPLY_ACK);
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s->common.write_cmd = -1;
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break;
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case KBD_CMD_SET_RATE:
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ps2_queue(&s->common, KBD_REPLY_ACK);
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s->common.write_cmd = -1;
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break;
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}
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}
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/* Set the scancode translation mode.
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0 = raw scancodes.
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1 = translated scancodes (used by qemu internally). */
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void ps2_keyboard_set_translation(void *opaque, int mode)
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{
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PS2KbdState *s = (PS2KbdState *)opaque;
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s->translate = mode;
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}
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static void ps2_mouse_send_packet(PS2MouseState *s)
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{
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unsigned int b;
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int dx1, dy1, dz1;
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dx1 = s->mouse_dx;
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dy1 = s->mouse_dy;
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dz1 = s->mouse_dz;
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/* XXX: increase range to 8 bits ? */
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if (dx1 > 127)
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dx1 = 127;
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else if (dx1 < -127)
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dx1 = -127;
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if (dy1 > 127)
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dy1 = 127;
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else if (dy1 < -127)
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dy1 = -127;
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b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07);
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ps2_queue(&s->common, b);
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ps2_queue(&s->common, dx1 & 0xff);
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ps2_queue(&s->common, dy1 & 0xff);
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/* extra byte for IMPS/2 or IMEX */
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switch(s->mouse_type) {
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default:
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break;
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case 3:
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if (dz1 > 127)
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dz1 = 127;
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else if (dz1 < -127)
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dz1 = -127;
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ps2_queue(&s->common, dz1 & 0xff);
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break;
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case 4:
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if (dz1 > 7)
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dz1 = 7;
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else if (dz1 < -7)
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dz1 = -7;
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b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1);
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ps2_queue(&s->common, b);
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break;
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}
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/* update deltas */
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s->mouse_dx -= dx1;
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s->mouse_dy -= dy1;
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s->mouse_dz -= dz1;
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}
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static void ps2_mouse_event(void *opaque,
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int dx, int dy, int dz, int buttons_state)
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{
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PS2MouseState *s = opaque;
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/* check if deltas are recorded when disabled */
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if (!(s->mouse_status & MOUSE_STATUS_ENABLED))
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return;
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s->mouse_dx += dx;
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s->mouse_dy -= dy;
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s->mouse_dz += dz;
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/* XXX: SDL sometimes generates nul events: we delete them */
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if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0 &&
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s->mouse_buttons == buttons_state)
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return;
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s->mouse_buttons = buttons_state;
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if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
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(s->common.queue.count < (PS2_QUEUE_SIZE - 16))) {
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for(;;) {
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/* if not remote, send event. Multiple events are sent if
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too big deltas */
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ps2_mouse_send_packet(s);
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if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0)
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break;
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}
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}
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}
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void ps2_mouse_fake_event(void *opaque)
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{
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ps2_mouse_event(opaque, 1, 0, 0, 0);
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}
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void ps2_write_mouse(void *opaque, int val)
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{
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PS2MouseState *s = (PS2MouseState *)opaque;
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#ifdef DEBUG_MOUSE
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printf("kbd: write mouse 0x%02x\n", val);
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#endif
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switch(s->common.write_cmd) {
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default:
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case -1:
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/* mouse command */
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if (s->mouse_wrap) {
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if (val == AUX_RESET_WRAP) {
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s->mouse_wrap = 0;
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ps2_queue(&s->common, AUX_ACK);
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return;
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} else if (val != AUX_RESET) {
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ps2_queue(&s->common, val);
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return;
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}
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}
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switch(val) {
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case AUX_SET_SCALE11:
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s->mouse_status &= ~MOUSE_STATUS_SCALE21;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_SET_SCALE21:
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s->mouse_status |= MOUSE_STATUS_SCALE21;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_SET_STREAM:
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s->mouse_status &= ~MOUSE_STATUS_REMOTE;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_SET_WRAP:
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s->mouse_wrap = 1;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_SET_REMOTE:
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s->mouse_status |= MOUSE_STATUS_REMOTE;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_GET_TYPE:
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ps2_queue(&s->common, AUX_ACK);
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ps2_queue(&s->common, s->mouse_type);
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break;
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case AUX_SET_RES:
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case AUX_SET_SAMPLE:
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s->common.write_cmd = val;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_GET_SCALE:
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ps2_queue(&s->common, AUX_ACK);
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ps2_queue(&s->common, s->mouse_status);
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ps2_queue(&s->common, s->mouse_resolution);
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ps2_queue(&s->common, s->mouse_sample_rate);
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break;
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case AUX_POLL:
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ps2_queue(&s->common, AUX_ACK);
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ps2_mouse_send_packet(s);
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break;
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case AUX_ENABLE_DEV:
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s->mouse_status |= MOUSE_STATUS_ENABLED;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_DISABLE_DEV:
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s->mouse_status &= ~MOUSE_STATUS_ENABLED;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_SET_DEFAULT:
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s->mouse_sample_rate = 100;
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s->mouse_resolution = 2;
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s->mouse_status = 0;
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ps2_queue(&s->common, AUX_ACK);
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break;
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case AUX_RESET:
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s->mouse_sample_rate = 100;
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s->mouse_resolution = 2;
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s->mouse_status = 0;
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s->mouse_type = 0;
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ps2_queue(&s->common, AUX_ACK);
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ps2_queue(&s->common, 0xaa);
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ps2_queue(&s->common, s->mouse_type);
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break;
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default:
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break;
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}
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break;
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case AUX_SET_SAMPLE:
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s->mouse_sample_rate = val;
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/* detect IMPS/2 or IMEX */
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switch(s->mouse_detect_state) {
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default:
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case 0:
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if (val == 200)
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s->mouse_detect_state = 1;
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break;
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case 1:
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if (val == 100)
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s->mouse_detect_state = 2;
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else if (val == 200)
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s->mouse_detect_state = 3;
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else
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s->mouse_detect_state = 0;
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break;
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case 2:
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if (val == 80)
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s->mouse_type = 3; /* IMPS/2 */
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s->mouse_detect_state = 0;
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break;
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case 3:
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if (val == 80)
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s->mouse_type = 4; /* IMEX */
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s->mouse_detect_state = 0;
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break;
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}
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ps2_queue(&s->common, AUX_ACK);
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s->common.write_cmd = -1;
|
|
break;
|
|
case AUX_SET_RES:
|
|
s->mouse_resolution = val;
|
|
ps2_queue(&s->common, AUX_ACK);
|
|
s->common.write_cmd = -1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void ps2_common_reset(PS2State *s)
|
|
{
|
|
PS2Queue *q;
|
|
s->write_cmd = -1;
|
|
q = &s->queue;
|
|
q->rptr = 0;
|
|
q->wptr = 0;
|
|
q->count = 0;
|
|
s->update_irq(s->update_arg, 0);
|
|
}
|
|
|
|
static void ps2_kbd_reset(void *opaque)
|
|
{
|
|
PS2KbdState *s = (PS2KbdState *) opaque;
|
|
|
|
ps2_common_reset(&s->common);
|
|
s->scan_enabled = 0;
|
|
s->translate = 0;
|
|
s->scancode_set = 0;
|
|
}
|
|
|
|
static void ps2_mouse_reset(void *opaque)
|
|
{
|
|
PS2MouseState *s = (PS2MouseState *) opaque;
|
|
|
|
ps2_common_reset(&s->common);
|
|
s->mouse_status = 0;
|
|
s->mouse_resolution = 0;
|
|
s->mouse_sample_rate = 0;
|
|
s->mouse_wrap = 0;
|
|
s->mouse_type = 0;
|
|
s->mouse_detect_state = 0;
|
|
s->mouse_dx = 0;
|
|
s->mouse_dy = 0;
|
|
s->mouse_dz = 0;
|
|
s->mouse_buttons = 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_ps2_common = {
|
|
.name = "PS2 Common State",
|
|
.version_id = 3,
|
|
.minimum_version_id = 2,
|
|
.minimum_version_id_old = 2,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_INT32(write_cmd, PS2State),
|
|
VMSTATE_INT32(queue.rptr, PS2State),
|
|
VMSTATE_INT32(queue.wptr, PS2State),
|
|
VMSTATE_INT32(queue.count, PS2State),
|
|
VMSTATE_BUFFER(queue.data, PS2State),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static int ps2_kbd_post_load(void* opaque, int version_id)
|
|
{
|
|
PS2KbdState *s = (PS2KbdState*)opaque;
|
|
|
|
if (version_id == 2)
|
|
s->scancode_set=2;
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_ps2_keyboard = {
|
|
.name = "ps2kbd",
|
|
.version_id = 3,
|
|
.minimum_version_id = 2,
|
|
.minimum_version_id_old = 2,
|
|
.post_load = ps2_kbd_post_load,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_STRUCT(common, PS2KbdState, 0, vmstate_ps2_common, PS2State),
|
|
VMSTATE_INT32(scan_enabled, PS2KbdState),
|
|
VMSTATE_INT32(translate, PS2KbdState),
|
|
VMSTATE_INT32_V(scancode_set, PS2KbdState,3),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_ps2_mouse = {
|
|
.name = "ps2mouse",
|
|
.version_id = 2,
|
|
.minimum_version_id = 2,
|
|
.minimum_version_id_old = 2,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_STRUCT(common, PS2MouseState, 0, vmstate_ps2_common, PS2State),
|
|
VMSTATE_UINT8(mouse_status, PS2MouseState),
|
|
VMSTATE_UINT8(mouse_resolution, PS2MouseState),
|
|
VMSTATE_UINT8(mouse_sample_rate, PS2MouseState),
|
|
VMSTATE_UINT8(mouse_wrap, PS2MouseState),
|
|
VMSTATE_UINT8(mouse_type, PS2MouseState),
|
|
VMSTATE_UINT8(mouse_detect_state, PS2MouseState),
|
|
VMSTATE_INT32(mouse_dx, PS2MouseState),
|
|
VMSTATE_INT32(mouse_dy, PS2MouseState),
|
|
VMSTATE_INT32(mouse_dz, PS2MouseState),
|
|
VMSTATE_UINT8(mouse_buttons, PS2MouseState),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg)
|
|
{
|
|
PS2KbdState *s = (PS2KbdState *)qemu_mallocz(sizeof(PS2KbdState));
|
|
|
|
s->common.update_irq = update_irq;
|
|
s->common.update_arg = update_arg;
|
|
s->scancode_set = 2;
|
|
vmstate_register(0, &vmstate_ps2_keyboard, s);
|
|
qemu_add_kbd_event_handler(ps2_put_keycode, s);
|
|
qemu_register_reset(ps2_kbd_reset, s);
|
|
return s;
|
|
}
|
|
|
|
void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg)
|
|
{
|
|
PS2MouseState *s = (PS2MouseState *)qemu_mallocz(sizeof(PS2MouseState));
|
|
|
|
s->common.update_irq = update_irq;
|
|
s->common.update_arg = update_arg;
|
|
vmstate_register(0, &vmstate_ps2_mouse, s);
|
|
qemu_add_mouse_event_handler(ps2_mouse_event, s, 0, "QEMU PS/2 Mouse");
|
|
qemu_register_reset(ps2_mouse_reset, s);
|
|
return s;
|
|
}
|