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/*
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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 "vl.h" |
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|
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/* debug PC keyboard */
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//#define DEBUG_KBD
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|
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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_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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|
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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_ACK 0xFA /* Command ACK */ |
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#define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */ |
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|
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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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|
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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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|
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#define PS2_QUEUE_SIZE 256 |
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|
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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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|
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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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|
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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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} PS2KbdState; |
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|
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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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|
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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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|
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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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static void ps2_put_keycode(void *opaque, int keycode) |
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{
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PS2KbdState *s = opaque; |
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if (!s->translate && keycode < 0xe0) |
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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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|
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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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} |
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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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ps2_queue(&s->common, 0xab);
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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_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_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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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) { |
| 348 |
ps2_queue(&s->common, val); |
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return;
|
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} |
| 351 |
} |
| 352 |
switch(val) {
|
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case AUX_SET_SCALE11:
|
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s->mouse_status &= ~MOUSE_STATUS_SCALE21; |
| 355 |
ps2_queue(&s->common, AUX_ACK); |
| 356 |
break;
|
| 357 |
case AUX_SET_SCALE21:
|
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s->mouse_status |= MOUSE_STATUS_SCALE21; |
| 359 |
ps2_queue(&s->common, AUX_ACK); |
| 360 |
break;
|
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case AUX_SET_STREAM:
|
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s->mouse_status &= ~MOUSE_STATUS_REMOTE; |
| 363 |
ps2_queue(&s->common, AUX_ACK); |
| 364 |
break;
|
| 365 |
case AUX_SET_WRAP:
|
| 366 |
s->mouse_wrap = 1;
|
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ps2_queue(&s->common, AUX_ACK); |
| 368 |
break;
|
| 369 |
case AUX_SET_REMOTE:
|
| 370 |
s->mouse_status |= MOUSE_STATUS_REMOTE; |
| 371 |
ps2_queue(&s->common, AUX_ACK); |
| 372 |
break;
|
| 373 |
case AUX_GET_TYPE:
|
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ps2_queue(&s->common, AUX_ACK); |
| 375 |
ps2_queue(&s->common, s->mouse_type); |
| 376 |
break;
|
| 377 |
case AUX_SET_RES:
|
| 378 |
case AUX_SET_SAMPLE:
|
| 379 |
s->common.write_cmd = val; |
| 380 |
ps2_queue(&s->common, AUX_ACK); |
| 381 |
break;
|
| 382 |
case AUX_GET_SCALE:
|
| 383 |
ps2_queue(&s->common, AUX_ACK); |
| 384 |
ps2_queue(&s->common, s->mouse_status); |
| 385 |
ps2_queue(&s->common, s->mouse_resolution); |
| 386 |
ps2_queue(&s->common, s->mouse_sample_rate); |
| 387 |
break;
|
| 388 |
case AUX_POLL:
|
| 389 |
ps2_queue(&s->common, AUX_ACK); |
| 390 |
ps2_mouse_send_packet(s); |
| 391 |
break;
|
| 392 |
case AUX_ENABLE_DEV:
|
| 393 |
s->mouse_status |= MOUSE_STATUS_ENABLED; |
| 394 |
ps2_queue(&s->common, AUX_ACK); |
| 395 |
break;
|
| 396 |
case AUX_DISABLE_DEV:
|
| 397 |
s->mouse_status &= ~MOUSE_STATUS_ENABLED; |
| 398 |
ps2_queue(&s->common, AUX_ACK); |
| 399 |
break;
|
| 400 |
case AUX_SET_DEFAULT:
|
| 401 |
s->mouse_sample_rate = 100;
|
| 402 |
s->mouse_resolution = 2;
|
| 403 |
s->mouse_status = 0;
|
| 404 |
ps2_queue(&s->common, AUX_ACK); |
| 405 |
break;
|
| 406 |
case AUX_RESET:
|
| 407 |
s->mouse_sample_rate = 100;
|
| 408 |
s->mouse_resolution = 2;
|
| 409 |
s->mouse_status = 0;
|
| 410 |
s->mouse_type = 0;
|
| 411 |
ps2_queue(&s->common, AUX_ACK); |
| 412 |
ps2_queue(&s->common, 0xaa);
|
| 413 |
ps2_queue(&s->common, s->mouse_type); |
| 414 |
break;
|
| 415 |
default:
|
| 416 |
break;
|
| 417 |
} |
| 418 |
break;
|
| 419 |
case AUX_SET_SAMPLE:
|
| 420 |
s->mouse_sample_rate = val; |
| 421 |
/* detect IMPS/2 or IMEX */
|
| 422 |
switch(s->mouse_detect_state) {
|
| 423 |
default:
|
| 424 |
case 0: |
| 425 |
if (val == 200) |
| 426 |
s->mouse_detect_state = 1;
|
| 427 |
break;
|
| 428 |
case 1: |
| 429 |
if (val == 100) |
| 430 |
s->mouse_detect_state = 2;
|
| 431 |
else if (val == 200) |
| 432 |
s->mouse_detect_state = 3;
|
| 433 |
else
|
| 434 |
s->mouse_detect_state = 0;
|
| 435 |
break;
|
| 436 |
case 2: |
| 437 |
if (val == 80) |
| 438 |
s->mouse_type = 3; /* IMPS/2 */ |
| 439 |
s->mouse_detect_state = 0;
|
| 440 |
break;
|
| 441 |
case 3: |
| 442 |
if (val == 80) |
| 443 |
s->mouse_type = 4; /* IMEX */ |
| 444 |
s->mouse_detect_state = 0;
|
| 445 |
break;
|
| 446 |
} |
| 447 |
ps2_queue(&s->common, AUX_ACK); |
| 448 |
s->common.write_cmd = -1;
|
| 449 |
break;
|
| 450 |
case AUX_SET_RES:
|
| 451 |
s->mouse_resolution = val; |
| 452 |
ps2_queue(&s->common, AUX_ACK); |
| 453 |
s->common.write_cmd = -1;
|
| 454 |
break;
|
| 455 |
} |
| 456 |
} |
| 457 |
|
| 458 |
static void ps2_reset(void *opaque) |
| 459 |
{
|
| 460 |
PS2State *s = (PS2State *)opaque; |
| 461 |
PS2Queue *q; |
| 462 |
s->write_cmd = -1;
|
| 463 |
q = &s->queue; |
| 464 |
q->rptr = 0;
|
| 465 |
q->wptr = 0;
|
| 466 |
q->count = 0;
|
| 467 |
} |
| 468 |
|
| 469 |
static void ps2_common_save (QEMUFile *f, PS2State *s) |
| 470 |
{
|
| 471 |
qemu_put_be32s (f, &s->write_cmd); |
| 472 |
qemu_put_be32s (f, &s->queue.rptr); |
| 473 |
qemu_put_be32s (f, &s->queue.wptr); |
| 474 |
qemu_put_be32s (f, &s->queue.count); |
| 475 |
qemu_put_buffer (f, s->queue.data, sizeof (s->queue.data));
|
| 476 |
} |
| 477 |
|
| 478 |
static void ps2_common_load (QEMUFile *f, PS2State *s) |
| 479 |
{
|
| 480 |
qemu_get_be32s (f, &s->write_cmd); |
| 481 |
qemu_get_be32s (f, &s->queue.rptr); |
| 482 |
qemu_get_be32s (f, &s->queue.wptr); |
| 483 |
qemu_get_be32s (f, &s->queue.count); |
| 484 |
qemu_get_buffer (f, s->queue.data, sizeof (s->queue.data));
|
| 485 |
} |
| 486 |
|
| 487 |
static void ps2_kbd_save(QEMUFile* f, void* opaque) |
| 488 |
{
|
| 489 |
PS2KbdState *s = (PS2KbdState*)opaque; |
| 490 |
|
| 491 |
ps2_common_save (f, &s->common); |
| 492 |
qemu_put_be32s(f, &s->scan_enabled); |
| 493 |
qemu_put_be32s(f, &s->translate); |
| 494 |
} |
| 495 |
|
| 496 |
static void ps2_mouse_save(QEMUFile* f, void* opaque) |
| 497 |
{
|
| 498 |
PS2MouseState *s = (PS2MouseState*)opaque; |
| 499 |
|
| 500 |
ps2_common_save (f, &s->common); |
| 501 |
qemu_put_8s(f, &s->mouse_status); |
| 502 |
qemu_put_8s(f, &s->mouse_resolution); |
| 503 |
qemu_put_8s(f, &s->mouse_sample_rate); |
| 504 |
qemu_put_8s(f, &s->mouse_wrap); |
| 505 |
qemu_put_8s(f, &s->mouse_type); |
| 506 |
qemu_put_8s(f, &s->mouse_detect_state); |
| 507 |
qemu_put_be32s(f, &s->mouse_dx); |
| 508 |
qemu_put_be32s(f, &s->mouse_dy); |
| 509 |
qemu_put_be32s(f, &s->mouse_dz); |
| 510 |
qemu_put_8s(f, &s->mouse_buttons); |
| 511 |
} |
| 512 |
|
| 513 |
static int ps2_kbd_load(QEMUFile* f, void* opaque, int version_id) |
| 514 |
{
|
| 515 |
PS2KbdState *s = (PS2KbdState*)opaque; |
| 516 |
|
| 517 |
if (version_id != 2) |
| 518 |
return -EINVAL;
|
| 519 |
|
| 520 |
ps2_common_load (f, &s->common); |
| 521 |
qemu_get_be32s(f, &s->scan_enabled); |
| 522 |
qemu_get_be32s(f, &s->translate); |
| 523 |
return 0; |
| 524 |
} |
| 525 |
|
| 526 |
static int ps2_mouse_load(QEMUFile* f, void* opaque, int version_id) |
| 527 |
{
|
| 528 |
PS2MouseState *s = (PS2MouseState*)opaque; |
| 529 |
|
| 530 |
if (version_id != 2) |
| 531 |
return -EINVAL;
|
| 532 |
|
| 533 |
ps2_common_load (f, &s->common); |
| 534 |
qemu_get_8s(f, &s->mouse_status); |
| 535 |
qemu_get_8s(f, &s->mouse_resolution); |
| 536 |
qemu_get_8s(f, &s->mouse_sample_rate); |
| 537 |
qemu_get_8s(f, &s->mouse_wrap); |
| 538 |
qemu_get_8s(f, &s->mouse_type); |
| 539 |
qemu_get_8s(f, &s->mouse_detect_state); |
| 540 |
qemu_get_be32s(f, &s->mouse_dx); |
| 541 |
qemu_get_be32s(f, &s->mouse_dy); |
| 542 |
qemu_get_be32s(f, &s->mouse_dz); |
| 543 |
qemu_get_8s(f, &s->mouse_buttons); |
| 544 |
return 0; |
| 545 |
} |
| 546 |
|
| 547 |
void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg) |
| 548 |
{
|
| 549 |
PS2KbdState *s = (PS2KbdState *)qemu_mallocz(sizeof(PS2KbdState));
|
| 550 |
|
| 551 |
s->common.update_irq = update_irq; |
| 552 |
s->common.update_arg = update_arg; |
| 553 |
ps2_reset(&s->common); |
| 554 |
register_savevm("ps2kbd", 0, 2, ps2_kbd_save, ps2_kbd_load, s); |
| 555 |
qemu_add_kbd_event_handler(ps2_put_keycode, s); |
| 556 |
qemu_register_reset(ps2_reset, &s->common); |
| 557 |
return s;
|
| 558 |
} |
| 559 |
|
| 560 |
void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg) |
| 561 |
{
|
| 562 |
PS2MouseState *s = (PS2MouseState *)qemu_mallocz(sizeof(PS2MouseState));
|
| 563 |
|
| 564 |
s->common.update_irq = update_irq; |
| 565 |
s->common.update_arg = update_arg; |
| 566 |
ps2_reset(&s->common); |
| 567 |
register_savevm("ps2mouse", 0, 2, ps2_mouse_save, ps2_mouse_load, s); |
| 568 |
qemu_add_mouse_event_handler(ps2_mouse_event, s, 0, "QEMU PS/2 Mouse"); |
| 569 |
qemu_register_reset(ps2_reset, &s->common); |
| 570 |
return s;
|
| 571 |
} |