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qemu/hw/input/ps2.c
Richard Henderson af0f07dfc7 hw/input: Constify VMState 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231221031652.119827-34-richard.henderson@linaro.org>
2023-12-29 11:17:30 +11:00

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/*
* QEMU PS/2 keyboard/mouse emulation
*
* Copyright (c) 2003 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "hw/irq.h"
#include "hw/sysbus.h"
#include "hw/input/ps2.h"
#include "migration/vmstate.h"
#include "ui/console.h"
#include "ui/input.h"
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
#include "qapi/error.h"
#include "trace.h"
/* Keyboard Commands */
#define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
#define KBD_CMD_ECHO 0xEE
#define KBD_CMD_SCANCODE 0xF0 /* Get/set scancode set */
#define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */
#define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
#define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
#define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */
#define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */
#define KBD_CMD_RESET 0xFF /* Reset */
#define KBD_CMD_SET_MAKE_BREAK 0xFC /* Set Make and Break mode */
#define KBD_CMD_SET_TYPEMATIC 0xFA /* Set Typematic Make and Break mode */
/* Keyboard Replies */
#define KBD_REPLY_POR 0xAA /* Power on reset */
#define KBD_REPLY_ID 0xAB /* Keyboard ID */
#define KBD_REPLY_ACK 0xFA /* Command ACK */
#define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
/* Mouse Commands */
#define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */
#define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */
#define AUX_SET_RES 0xE8 /* Set resolution */
#define AUX_GET_SCALE 0xE9 /* Get scaling factor */
#define AUX_SET_STREAM 0xEA /* Set stream mode */
#define AUX_POLL 0xEB /* Poll */
#define AUX_RESET_WRAP 0xEC /* Reset wrap mode */
#define AUX_SET_WRAP 0xEE /* Set wrap mode */
#define AUX_SET_REMOTE 0xF0 /* Set remote mode */
#define AUX_GET_TYPE 0xF2 /* Get type */
#define AUX_SET_SAMPLE 0xF3 /* Set sample rate */
#define AUX_ENABLE_DEV 0xF4 /* Enable aux device */
#define AUX_DISABLE_DEV 0xF5 /* Disable aux device */
#define AUX_SET_DEFAULT 0xF6
#define AUX_RESET 0xFF /* Reset aux device */
#define AUX_ACK 0xFA /* Command byte ACK. */
#define MOUSE_STATUS_REMOTE 0x40
#define MOUSE_STATUS_ENABLED 0x20
#define MOUSE_STATUS_SCALE21 0x10
#define PS2_QUEUE_SIZE 16 /* Queue size required by PS/2 protocol */
#define PS2_QUEUE_HEADROOM 8 /* Queue size for keyboard command replies */
/* Bits for 'modifiers' field in PS2KbdState */
#define MOD_CTRL_L (1 << 0)
#define MOD_SHIFT_L (1 << 1)
#define MOD_ALT_L (1 << 2)
#define MOD_CTRL_R (1 << 3)
#define MOD_SHIFT_R (1 << 4)
#define MOD_ALT_R (1 << 5)
static uint8_t translate_table[256] = {
0xff, 0x43, 0x41, 0x3f, 0x3d, 0x3b, 0x3c, 0x58,
0x64, 0x44, 0x42, 0x40, 0x3e, 0x0f, 0x29, 0x59,
0x65, 0x38, 0x2a, 0x70, 0x1d, 0x10, 0x02, 0x5a,
0x66, 0x71, 0x2c, 0x1f, 0x1e, 0x11, 0x03, 0x5b,
0x67, 0x2e, 0x2d, 0x20, 0x12, 0x05, 0x04, 0x5c,
0x68, 0x39, 0x2f, 0x21, 0x14, 0x13, 0x06, 0x5d,
0x69, 0x31, 0x30, 0x23, 0x22, 0x15, 0x07, 0x5e,
0x6a, 0x72, 0x32, 0x24, 0x16, 0x08, 0x09, 0x5f,
0x6b, 0x33, 0x25, 0x17, 0x18, 0x0b, 0x0a, 0x60,
0x6c, 0x34, 0x35, 0x26, 0x27, 0x19, 0x0c, 0x61,
0x6d, 0x73, 0x28, 0x74, 0x1a, 0x0d, 0x62, 0x6e,
0x3a, 0x36, 0x1c, 0x1b, 0x75, 0x2b, 0x63, 0x76,
0x55, 0x56, 0x77, 0x78, 0x79, 0x7a, 0x0e, 0x7b,
0x7c, 0x4f, 0x7d, 0x4b, 0x47, 0x7e, 0x7f, 0x6f,
0x52, 0x53, 0x50, 0x4c, 0x4d, 0x48, 0x01, 0x45,
0x57, 0x4e, 0x51, 0x4a, 0x37, 0x49, 0x46, 0x54,
0x80, 0x81, 0x82, 0x41, 0x54, 0x85, 0x86, 0x87,
0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
};
static unsigned int ps2_modifier_bit(QKeyCode key)
{
switch (key) {
case Q_KEY_CODE_CTRL:
return MOD_CTRL_L;
case Q_KEY_CODE_CTRL_R:
return MOD_CTRL_R;
case Q_KEY_CODE_SHIFT:
return MOD_SHIFT_L;
case Q_KEY_CODE_SHIFT_R:
return MOD_SHIFT_R;
case Q_KEY_CODE_ALT:
return MOD_ALT_L;
case Q_KEY_CODE_ALT_R:
return MOD_ALT_R;
default:
return 0;
}
}
static void ps2_reset_queue(PS2State *s)
{
PS2Queue *q = &s->queue;
q->rptr = 0;
q->wptr = 0;
q->cwptr = -1;
q->count = 0;
}
int ps2_queue_empty(PS2State *s)
{
return s->queue.count == 0;
}
void ps2_queue_noirq(PS2State *s, int b)
{
PS2Queue *q = &s->queue;
if (q->count >= PS2_QUEUE_SIZE) {
return;
}
q->data[q->wptr] = b;
if (++q->wptr == PS2_BUFFER_SIZE) {
q->wptr = 0;
}
q->count++;
}
static void ps2_raise_irq(PS2State *s)
{
qemu_set_irq(s->irq, 1);
}
static void ps2_lower_irq(PS2State *s)
{
qemu_set_irq(s->irq, 0);
}
void ps2_queue(PS2State *s, int b)
{
if (PS2_QUEUE_SIZE - s->queue.count < 1) {
return;
}
ps2_queue_noirq(s, b);
ps2_raise_irq(s);
}
void ps2_queue_2(PS2State *s, int b1, int b2)
{
if (PS2_QUEUE_SIZE - s->queue.count < 2) {
return;
}
ps2_queue_noirq(s, b1);
ps2_queue_noirq(s, b2);
ps2_raise_irq(s);
}
void ps2_queue_3(PS2State *s, int b1, int b2, int b3)
{
if (PS2_QUEUE_SIZE - s->queue.count < 3) {
return;
}
ps2_queue_noirq(s, b1);
ps2_queue_noirq(s, b2);
ps2_queue_noirq(s, b3);
ps2_raise_irq(s);
}
void ps2_queue_4(PS2State *s, int b1, int b2, int b3, int b4)
{
if (PS2_QUEUE_SIZE - s->queue.count < 4) {
return;
}
ps2_queue_noirq(s, b1);
ps2_queue_noirq(s, b2);
ps2_queue_noirq(s, b3);
ps2_queue_noirq(s, b4);
ps2_raise_irq(s);
}
static void ps2_cqueue_data(PS2Queue *q, int b)
{
q->data[q->cwptr] = b;
if (++q->cwptr >= PS2_BUFFER_SIZE) {
q->cwptr = 0;
}
q->count++;
}
static void ps2_cqueue_1(PS2State *s, int b1)
{
PS2Queue *q = &s->queue;
q->rptr = (q->rptr - 1) & (PS2_BUFFER_SIZE - 1);
q->cwptr = q->rptr;
ps2_cqueue_data(q, b1);
ps2_raise_irq(s);
}
static void ps2_cqueue_2(PS2State *s, int b1, int b2)
{
PS2Queue *q = &s->queue;
q->rptr = (q->rptr - 2) & (PS2_BUFFER_SIZE - 1);
q->cwptr = q->rptr;
ps2_cqueue_data(q, b1);
ps2_cqueue_data(q, b2);
ps2_raise_irq(s);
}
static void ps2_cqueue_3(PS2State *s, int b1, int b2, int b3)
{
PS2Queue *q = &s->queue;
q->rptr = (q->rptr - 3) & (PS2_BUFFER_SIZE - 1);
q->cwptr = q->rptr;
ps2_cqueue_data(q, b1);
ps2_cqueue_data(q, b2);
ps2_cqueue_data(q, b3);
ps2_raise_irq(s);
}
static void ps2_cqueue_reset(PS2State *s)
{
PS2Queue *q = &s->queue;
int ccount;
if (q->cwptr == -1) {
return;
}
ccount = (q->cwptr - q->rptr) & (PS2_BUFFER_SIZE - 1);
q->count -= ccount;
q->rptr = q->cwptr;
q->cwptr = -1;
}
/* keycode is the untranslated scancode in the current scancode set. */
static void ps2_put_keycode(void *opaque, int keycode)
{
PS2KbdState *s = opaque;
PS2State *ps = PS2_DEVICE(s);
trace_ps2_put_keycode(opaque, keycode);
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL);
if (s->translate) {
if (keycode == 0xf0) {
s->need_high_bit = true;
} else if (s->need_high_bit) {
ps2_queue(ps, translate_table[keycode] | 0x80);
s->need_high_bit = false;
} else {
ps2_queue(ps, translate_table[keycode]);
}
} else {
ps2_queue(ps, keycode);
}
}
static void ps2_keyboard_event(DeviceState *dev, QemuConsole *src,
InputEvent *evt)
{
PS2KbdState *s = (PS2KbdState *)dev;
InputKeyEvent *key = evt->u.key.data;
int qcode;
uint16_t keycode = 0;
int mod;
/* do not process events while disabled to prevent stream corruption */
if (!s->scan_enabled) {
return;
}
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL);
assert(evt->type == INPUT_EVENT_KIND_KEY);
qcode = qemu_input_key_value_to_qcode(key->key);
mod = ps2_modifier_bit(qcode);
trace_ps2_keyboard_event(s, qcode, key->down, mod,
s->modifiers, s->scancode_set, s->translate);
if (key->down) {
s->modifiers |= mod;
} else {
s->modifiers &= ~mod;
}
if (s->scancode_set == 1) {
if (qcode == Q_KEY_CODE_PAUSE) {
if (s->modifiers & (MOD_CTRL_L | MOD_CTRL_R)) {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x46);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xc6);
}
} else {
if (key->down) {
ps2_put_keycode(s, 0xe1);
ps2_put_keycode(s, 0x1d);
ps2_put_keycode(s, 0x45);
ps2_put_keycode(s, 0xe1);
ps2_put_keycode(s, 0x9d);
ps2_put_keycode(s, 0xc5);
}
}
} else if (qcode == Q_KEY_CODE_PRINT) {
if (s->modifiers & MOD_ALT_L) {
if (key->down) {
ps2_put_keycode(s, 0xb8);
ps2_put_keycode(s, 0x38);
ps2_put_keycode(s, 0x54);
} else {
ps2_put_keycode(s, 0xd4);
ps2_put_keycode(s, 0xb8);
ps2_put_keycode(s, 0x38);
}
} else if (s->modifiers & MOD_ALT_R) {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xb8);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x38);
ps2_put_keycode(s, 0x54);
} else {
ps2_put_keycode(s, 0xd4);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xb8);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x38);
}
} else if (s->modifiers & (MOD_SHIFT_L | MOD_CTRL_L |
MOD_SHIFT_R | MOD_CTRL_R)) {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x37);
} else {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xb7);
}
} else {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x2a);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x37);
} else {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xb7);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xaa);
}
}
} else if ((qcode == Q_KEY_CODE_LANG1 || qcode == Q_KEY_CODE_LANG2)
&& !key->down) {
/* Ignore release for these keys */
} else {
if (qcode < qemu_input_map_qcode_to_atset1_len) {
keycode = qemu_input_map_qcode_to_atset1[qcode];
}
if (keycode) {
if (keycode & 0xff00) {
ps2_put_keycode(s, keycode >> 8);
}
if (!key->down) {
keycode |= 0x80;
}
ps2_put_keycode(s, keycode & 0xff);
} else {
qemu_log_mask(LOG_UNIMP,
"ps2: ignoring key with qcode %d\n", qcode);
}
}
} else if (s->scancode_set == 2) {
if (qcode == Q_KEY_CODE_PAUSE) {
if (s->modifiers & (MOD_CTRL_L | MOD_CTRL_R)) {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x7e);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x7e);
}
} else {
if (key->down) {
ps2_put_keycode(s, 0xe1);
ps2_put_keycode(s, 0x14);
ps2_put_keycode(s, 0x77);
ps2_put_keycode(s, 0xe1);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x14);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x77);
}
}
} else if (qcode == Q_KEY_CODE_PRINT) {
if (s->modifiers & MOD_ALT_L) {
if (key->down) {
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x11);
ps2_put_keycode(s, 0x11);
ps2_put_keycode(s, 0x84);
} else {
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x84);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x11);
ps2_put_keycode(s, 0x11);
}
} else if (s->modifiers & MOD_ALT_R) {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x11);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x11);
ps2_put_keycode(s, 0x84);
} else {
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x84);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x11);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x11);
}
} else if (s->modifiers & (MOD_SHIFT_L | MOD_CTRL_L |
MOD_SHIFT_R | MOD_CTRL_R)) {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x7c);
} else {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x7c);
}
} else {
if (key->down) {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x12);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0x7c);
} else {
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x7c);
ps2_put_keycode(s, 0xe0);
ps2_put_keycode(s, 0xf0);
ps2_put_keycode(s, 0x12);
}
}
} else if ((qcode == Q_KEY_CODE_LANG1 || qcode == Q_KEY_CODE_LANG2) &&
!key->down) {
/* Ignore release for these keys */
} else {
if (qcode < qemu_input_map_qcode_to_atset2_len) {
keycode = qemu_input_map_qcode_to_atset2[qcode];
}
if (keycode) {
if (keycode & 0xff00) {
ps2_put_keycode(s, keycode >> 8);
}
if (!key->down) {
ps2_put_keycode(s, 0xf0);
}
ps2_put_keycode(s, keycode & 0xff);
} else {
qemu_log_mask(LOG_UNIMP,
"ps2: ignoring key with qcode %d\n", qcode);
}
}
} else if (s->scancode_set == 3) {
if (qcode < qemu_input_map_qcode_to_atset3_len) {
keycode = qemu_input_map_qcode_to_atset3[qcode];
}
if (keycode) {
/* FIXME: break code should be configured on a key by key basis */
if (!key->down) {
ps2_put_keycode(s, 0xf0);
}
ps2_put_keycode(s, keycode);
} else {
qemu_log_mask(LOG_UNIMP,
"ps2: ignoring key with qcode %d\n", qcode);
}
}
}
uint32_t ps2_read_data(PS2State *s)
{
PS2Queue *q;
int val, index;
trace_ps2_read_data(s);
q = &s->queue;
if (q->count == 0) {
/*
* NOTE: if no data left, we return the last keyboard one
* (needed for EMM386)
*/
/* XXX: need a timer to do things correctly */
index = q->rptr - 1;
if (index < 0) {
index = PS2_BUFFER_SIZE - 1;
}
val = q->data[index];
} else {
val = q->data[q->rptr];
if (++q->rptr == PS2_BUFFER_SIZE) {
q->rptr = 0;
}
q->count--;
if (q->rptr == q->cwptr) {
/* command reply queue is empty */
q->cwptr = -1;
}
/* reading deasserts IRQ */
ps2_lower_irq(s);
/* reassert IRQs if data left */
if (q->count) {
ps2_raise_irq(s);
}
}
return val;
}
static void ps2_set_ledstate(PS2KbdState *s, int ledstate)
{
trace_ps2_set_ledstate(s, ledstate);
s->ledstate = ledstate;
kbd_put_ledstate(ledstate);
}
static void ps2_reset_keyboard(PS2KbdState *s)
{
PS2State *ps2 = PS2_DEVICE(s);
trace_ps2_reset_keyboard(s);
s->scan_enabled = 1;
s->scancode_set = 2;
ps2_reset_queue(ps2);
ps2_set_ledstate(s, 0);
}
void ps2_write_keyboard(PS2KbdState *s, int val)
{
PS2State *ps2 = PS2_DEVICE(s);
trace_ps2_write_keyboard(s, val);
ps2_cqueue_reset(ps2);
switch (ps2->write_cmd) {
default:
case -1:
switch (val) {
case 0x00:
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
break;
case 0x05:
ps2_cqueue_1(ps2, KBD_REPLY_RESEND);
break;
case KBD_CMD_GET_ID:
/* We emulate a MF2 AT keyboard here */
ps2_cqueue_3(ps2, KBD_REPLY_ACK, KBD_REPLY_ID,
s->translate ? 0x41 : 0x83);
break;
case KBD_CMD_ECHO:
ps2_cqueue_1(ps2, KBD_CMD_ECHO);
break;
case KBD_CMD_ENABLE:
s->scan_enabled = 1;
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
break;
case KBD_CMD_SCANCODE:
case KBD_CMD_SET_LEDS:
case KBD_CMD_SET_RATE:
case KBD_CMD_SET_MAKE_BREAK:
ps2->write_cmd = val;
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
break;
case KBD_CMD_RESET_DISABLE:
ps2_reset_keyboard(s);
s->scan_enabled = 0;
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
break;
case KBD_CMD_RESET_ENABLE:
ps2_reset_keyboard(s);
s->scan_enabled = 1;
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
break;
case KBD_CMD_RESET:
ps2_reset_keyboard(s);
ps2_cqueue_2(ps2,
KBD_REPLY_ACK,
KBD_REPLY_POR);
break;
case KBD_CMD_SET_TYPEMATIC:
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
break;
default:
ps2_cqueue_1(ps2, KBD_REPLY_RESEND);
break;
}
break;
case KBD_CMD_SET_MAKE_BREAK:
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
ps2->write_cmd = -1;
break;
case KBD_CMD_SCANCODE:
if (val == 0) {
ps2_cqueue_2(ps2, KBD_REPLY_ACK, s->translate ?
translate_table[s->scancode_set] : s->scancode_set);
} else if (val >= 1 && val <= 3) {
s->scancode_set = val;
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
} else {
ps2_cqueue_1(ps2, KBD_REPLY_RESEND);
}
ps2->write_cmd = -1;
break;
case KBD_CMD_SET_LEDS:
ps2_set_ledstate(s, val);
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
ps2->write_cmd = -1;
break;
case KBD_CMD_SET_RATE:
ps2_cqueue_1(ps2, KBD_REPLY_ACK);
ps2->write_cmd = -1;
break;
}
}
/*
* Set the scancode translation mode.
* 0 = raw scancodes.
* 1 = translated scancodes (used by qemu internally).
*/
void ps2_keyboard_set_translation(PS2KbdState *s, int mode)
{
trace_ps2_keyboard_set_translation(s, mode);
s->translate = mode;
}
static int ps2_mouse_send_packet(PS2MouseState *s)
{
PS2State *ps2 = PS2_DEVICE(s);
/* IMPS/2 and IMEX send 4 bytes, PS2 sends 3 bytes */
const int needed = s->mouse_type ? 4 : 3;
unsigned int b;
int dx1, dy1, dz1, dw1;
if (PS2_QUEUE_SIZE - ps2->queue.count < needed) {
return 0;
}
dx1 = s->mouse_dx;
dy1 = s->mouse_dy;
dz1 = s->mouse_dz;
dw1 = s->mouse_dw;
/* XXX: increase range to 8 bits ? */
if (dx1 > 127) {
dx1 = 127;
} else if (dx1 < -127) {
dx1 = -127;
}
if (dy1 > 127) {
dy1 = 127;
} else if (dy1 < -127) {
dy1 = -127;
}
b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07);
ps2_queue_noirq(ps2, b);
ps2_queue_noirq(ps2, dx1 & 0xff);
ps2_queue_noirq(ps2, dy1 & 0xff);
/* extra byte for IMPS/2 or IMEX */
switch (s->mouse_type) {
default:
/* Just ignore the wheels if not supported */
s->mouse_dz = 0;
s->mouse_dw = 0;
break;
case 3:
if (dz1 > 127) {
dz1 = 127;
} else if (dz1 < -127) {
dz1 = -127;
}
ps2_queue_noirq(ps2, dz1 & 0xff);
s->mouse_dz -= dz1;
s->mouse_dw = 0;
break;
case 4:
/*
* This matches what the Linux kernel expects for exps/2 in
* drivers/input/mouse/psmouse-base.c. Note, if you happen to
* press/release the 4th or 5th buttons at the same moment as a
* horizontal wheel scroll, those button presses will get lost. I'm not
* sure what to do about that, since by this point we don't know
* whether those buttons actually changed state.
*/
if (dw1 != 0) {
if (dw1 > 31) {
dw1 = 31;
} else if (dw1 < -31) {
dw1 = -31;
}
/*
* linux kernel expects first 6 bits to represent the value
* for horizontal scroll
*/
b = (dw1 & 0x3f) | 0x40;
s->mouse_dw -= dw1;
} else {
if (dz1 > 7) {
dz1 = 7;
} else if (dz1 < -7) {
dz1 = -7;
}
b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1);
s->mouse_dz -= dz1;
}
ps2_queue_noirq(ps2, b);
break;
}
ps2_raise_irq(ps2);
trace_ps2_mouse_send_packet(s, dx1, dy1, dz1, b);
/* update deltas */
s->mouse_dx -= dx1;
s->mouse_dy -= dy1;
return 1;
}
static void ps2_mouse_event(DeviceState *dev, QemuConsole *src,
InputEvent *evt)
{
static const int bmap[INPUT_BUTTON__MAX] = {
[INPUT_BUTTON_LEFT] = PS2_MOUSE_BUTTON_LEFT,
[INPUT_BUTTON_MIDDLE] = PS2_MOUSE_BUTTON_MIDDLE,
[INPUT_BUTTON_RIGHT] = PS2_MOUSE_BUTTON_RIGHT,
[INPUT_BUTTON_SIDE] = PS2_MOUSE_BUTTON_SIDE,
[INPUT_BUTTON_EXTRA] = PS2_MOUSE_BUTTON_EXTRA,
};
PS2MouseState *s = (PS2MouseState *)dev;
InputMoveEvent *move;
InputBtnEvent *btn;
/* check if deltas are recorded when disabled */
if (!(s->mouse_status & MOUSE_STATUS_ENABLED)) {
return;
}
switch (evt->type) {
case INPUT_EVENT_KIND_REL:
move = evt->u.rel.data;
if (move->axis == INPUT_AXIS_X) {
s->mouse_dx += move->value;
} else if (move->axis == INPUT_AXIS_Y) {
s->mouse_dy -= move->value;
}
break;
case INPUT_EVENT_KIND_BTN:
btn = evt->u.btn.data;
if (btn->down) {
s->mouse_buttons |= bmap[btn->button];
if (btn->button == INPUT_BUTTON_WHEEL_UP) {
s->mouse_dz--;
} else if (btn->button == INPUT_BUTTON_WHEEL_DOWN) {
s->mouse_dz++;
}
if (btn->button == INPUT_BUTTON_WHEEL_RIGHT) {
s->mouse_dw--;
} else if (btn->button == INPUT_BUTTON_WHEEL_LEFT) {
s->mouse_dw++;
}
} else {
s->mouse_buttons &= ~bmap[btn->button];
}
break;
default:
/* keep gcc happy */
break;
}
}
static void ps2_mouse_sync(DeviceState *dev)
{
PS2MouseState *s = (PS2MouseState *)dev;
/* do not sync while disabled to prevent stream corruption */
if (!(s->mouse_status & MOUSE_STATUS_ENABLED)) {
return;
}
if (s->mouse_buttons) {
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL);
}
if (!(s->mouse_status & MOUSE_STATUS_REMOTE)) {
/*
* if not remote, send event. Multiple events are sent if
* too big deltas
*/
while (ps2_mouse_send_packet(s)) {
if (s->mouse_dx == 0 && s->mouse_dy == 0
&& s->mouse_dz == 0 && s->mouse_dw == 0) {
break;
}
}
}
}
void ps2_mouse_fake_event(PS2MouseState *s)
{
trace_ps2_mouse_fake_event(s);
s->mouse_dx++;
ps2_mouse_sync(DEVICE(s));
}
void ps2_write_mouse(PS2MouseState *s, int val)
{
PS2State *ps2 = PS2_DEVICE(s);
trace_ps2_write_mouse(s, val);
switch (ps2->write_cmd) {
default:
case -1:
/* mouse command */
if (s->mouse_wrap) {
if (val == AUX_RESET_WRAP) {
s->mouse_wrap = 0;
ps2_queue(ps2, AUX_ACK);
return;
} else if (val != AUX_RESET) {
ps2_queue(ps2, val);
return;
}
}
switch (val) {
case AUX_SET_SCALE11:
s->mouse_status &= ~MOUSE_STATUS_SCALE21;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_SET_SCALE21:
s->mouse_status |= MOUSE_STATUS_SCALE21;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_SET_STREAM:
s->mouse_status &= ~MOUSE_STATUS_REMOTE;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_SET_WRAP:
s->mouse_wrap = 1;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_SET_REMOTE:
s->mouse_status |= MOUSE_STATUS_REMOTE;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_GET_TYPE:
ps2_queue_2(ps2,
AUX_ACK,
s->mouse_type);
break;
case AUX_SET_RES:
case AUX_SET_SAMPLE:
ps2->write_cmd = val;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_GET_SCALE:
ps2_queue_4(ps2,
AUX_ACK,
s->mouse_status,
s->mouse_resolution,
s->mouse_sample_rate);
break;
case AUX_POLL:
ps2_queue(ps2, AUX_ACK);
ps2_mouse_send_packet(s);
break;
case AUX_ENABLE_DEV:
s->mouse_status |= MOUSE_STATUS_ENABLED;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_DISABLE_DEV:
s->mouse_status &= ~MOUSE_STATUS_ENABLED;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_SET_DEFAULT:
s->mouse_sample_rate = 100;
s->mouse_resolution = 2;
s->mouse_status = 0;
ps2_queue(ps2, AUX_ACK);
break;
case AUX_RESET:
s->mouse_sample_rate = 100;
s->mouse_resolution = 2;
s->mouse_status = 0;
s->mouse_type = 0;
ps2_reset_queue(ps2);
ps2_queue_3(ps2,
AUX_ACK,
0xaa,
s->mouse_type);
break;
default:
break;
}
break;
case AUX_SET_SAMPLE:
s->mouse_sample_rate = val;
/* detect IMPS/2 or IMEX */
switch (s->mouse_detect_state) {
default:
case 0:
if (val == 200) {
s->mouse_detect_state = 1;
}
break;
case 1:
if (val == 100) {
s->mouse_detect_state = 2;
} else if (val == 200) {
s->mouse_detect_state = 3;
} else {
s->mouse_detect_state = 0;
}
break;
case 2:
if (val == 80) {
s->mouse_type = 3; /* IMPS/2 */
}
s->mouse_detect_state = 0;
break;
case 3:
if (val == 80) {
s->mouse_type = 4; /* IMEX */
}
s->mouse_detect_state = 0;
break;
}
ps2_queue(ps2, AUX_ACK);
ps2->write_cmd = -1;
break;
case AUX_SET_RES:
s->mouse_resolution = val;
ps2_queue(ps2, AUX_ACK);
ps2->write_cmd = -1;
break;
}
}
static void ps2_reset_hold(Object *obj)
{
PS2State *s = PS2_DEVICE(obj);
s->write_cmd = -1;
ps2_reset_queue(s);
}
static void ps2_reset_exit(Object *obj)
{
PS2State *s = PS2_DEVICE(obj);
ps2_lower_irq(s);
}
static void ps2_common_post_load(PS2State *s)
{
PS2Queue *q = &s->queue;
int ccount = 0;
/* limit the number of queued command replies to PS2_QUEUE_HEADROOM */
if (q->cwptr != -1) {
ccount = (q->cwptr - q->rptr) & (PS2_BUFFER_SIZE - 1);
if (ccount > PS2_QUEUE_HEADROOM) {
ccount = PS2_QUEUE_HEADROOM;
}
}
/* limit the scancode queue size to PS2_QUEUE_SIZE */
if (q->count < ccount) {
q->count = ccount;
} else if (q->count > ccount + PS2_QUEUE_SIZE) {
q->count = ccount + PS2_QUEUE_SIZE;
}
/* sanitize rptr and recalculate wptr and cwptr */
q->rptr = q->rptr & (PS2_BUFFER_SIZE - 1);
q->wptr = (q->rptr + q->count) & (PS2_BUFFER_SIZE - 1);
q->cwptr = ccount ? (q->rptr + ccount) & (PS2_BUFFER_SIZE - 1) : -1;
}
static void ps2_kbd_reset_hold(Object *obj)
{
PS2DeviceClass *ps2dc = PS2_DEVICE_GET_CLASS(obj);
PS2KbdState *s = PS2_KBD_DEVICE(obj);
trace_ps2_kbd_reset(s);
if (ps2dc->parent_phases.hold) {
ps2dc->parent_phases.hold(obj);
}
s->scan_enabled = 1;
s->translate = 0;
s->scancode_set = 2;
s->modifiers = 0;
}
static void ps2_mouse_reset_hold(Object *obj)
{
PS2DeviceClass *ps2dc = PS2_DEVICE_GET_CLASS(obj);
PS2MouseState *s = PS2_MOUSE_DEVICE(obj);
trace_ps2_mouse_reset(s);
if (ps2dc->parent_phases.hold) {
ps2dc->parent_phases.hold(obj);
}
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_dw = 0;
s->mouse_buttons = 0;
}
static const VMStateDescription vmstate_ps2_common = {
.name = "PS2 Common State",
.version_id = 3,
.minimum_version_id = 2,
.fields = (const 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 bool ps2_keyboard_ledstate_needed(void *opaque)
{
PS2KbdState *s = opaque;
return s->ledstate != 0; /* 0 is default state */
}
static int ps2_kbd_ledstate_post_load(void *opaque, int version_id)
{
PS2KbdState *s = opaque;
kbd_put_ledstate(s->ledstate);
return 0;
}
static const VMStateDescription vmstate_ps2_keyboard_ledstate = {
.name = "ps2kbd/ledstate",
.version_id = 3,
.minimum_version_id = 2,
.post_load = ps2_kbd_ledstate_post_load,
.needed = ps2_keyboard_ledstate_needed,
.fields = (const VMStateField[]) {
VMSTATE_INT32(ledstate, PS2KbdState),
VMSTATE_END_OF_LIST()
}
};
static bool ps2_keyboard_need_high_bit_needed(void *opaque)
{
PS2KbdState *s = opaque;
return s->need_high_bit != 0; /* 0 is the usual state */
}
static const VMStateDescription vmstate_ps2_keyboard_need_high_bit = {
.name = "ps2kbd/need_high_bit",
.version_id = 1,
.minimum_version_id = 1,
.needed = ps2_keyboard_need_high_bit_needed,
.fields = (const VMStateField[]) {
VMSTATE_BOOL(need_high_bit, PS2KbdState),
VMSTATE_END_OF_LIST()
}
};
static bool ps2_keyboard_cqueue_needed(void *opaque)
{
PS2KbdState *s = opaque;
PS2State *ps2 = PS2_DEVICE(s);
return ps2->queue.cwptr != -1; /* the queue is mostly empty */
}
static const VMStateDescription vmstate_ps2_keyboard_cqueue = {
.name = "ps2kbd/command_reply_queue",
.needed = ps2_keyboard_cqueue_needed,
.fields = (const VMStateField[]) {
VMSTATE_INT32(parent_obj.queue.cwptr, PS2KbdState),
VMSTATE_END_OF_LIST()
}
};
static int ps2_kbd_post_load(void *opaque, int version_id)
{
PS2KbdState *s = (PS2KbdState *)opaque;
PS2State *ps2 = PS2_DEVICE(s);
if (version_id == 2) {
s->scancode_set = 2;
}
ps2_common_post_load(ps2);
return 0;
}
static const VMStateDescription vmstate_ps2_keyboard = {
.name = "ps2kbd",
.version_id = 3,
.minimum_version_id = 2,
.post_load = ps2_kbd_post_load,
.fields = (const VMStateField[]) {
VMSTATE_STRUCT(parent_obj, 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()
},
.subsections = (const VMStateDescription * const []) {
&vmstate_ps2_keyboard_ledstate,
&vmstate_ps2_keyboard_need_high_bit,
&vmstate_ps2_keyboard_cqueue,
NULL
}
};
static int ps2_mouse_post_load(void *opaque, int version_id)
{
PS2MouseState *s = (PS2MouseState *)opaque;
PS2State *ps2 = PS2_DEVICE(s);
ps2_common_post_load(ps2);
return 0;
}
static const VMStateDescription vmstate_ps2_mouse = {
.name = "ps2mouse",
.version_id = 2,
.minimum_version_id = 2,
.post_load = ps2_mouse_post_load,
.fields = (const VMStateField[]) {
VMSTATE_STRUCT(parent_obj, 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()
}
};
static const QemuInputHandler ps2_keyboard_handler = {
.name = "QEMU PS/2 Keyboard",
.mask = INPUT_EVENT_MASK_KEY,
.event = ps2_keyboard_event,
};
static void ps2_kbd_realize(DeviceState *dev, Error **errp)
{
qemu_input_handler_register(dev, &ps2_keyboard_handler);
}
static const QemuInputHandler ps2_mouse_handler = {
.name = "QEMU PS/2 Mouse",
.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
.event = ps2_mouse_event,
.sync = ps2_mouse_sync,
};
static void ps2_mouse_realize(DeviceState *dev, Error **errp)
{
qemu_input_handler_register(dev, &ps2_mouse_handler);
}
static void ps2_kbd_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
PS2DeviceClass *ps2dc = PS2_DEVICE_CLASS(klass);
dc->realize = ps2_kbd_realize;
resettable_class_set_parent_phases(rc, NULL, ps2_kbd_reset_hold, NULL,
&ps2dc->parent_phases);
dc->vmsd = &vmstate_ps2_keyboard;
}
static const TypeInfo ps2_kbd_info = {
.name = TYPE_PS2_KBD_DEVICE,
.parent = TYPE_PS2_DEVICE,
.instance_size = sizeof(PS2KbdState),
.class_init = ps2_kbd_class_init
};
static void ps2_mouse_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
PS2DeviceClass *ps2dc = PS2_DEVICE_CLASS(klass);
dc->realize = ps2_mouse_realize;
resettable_class_set_parent_phases(rc, NULL, ps2_mouse_reset_hold, NULL,
&ps2dc->parent_phases);
dc->vmsd = &vmstate_ps2_mouse;
}
static const TypeInfo ps2_mouse_info = {
.name = TYPE_PS2_MOUSE_DEVICE,
.parent = TYPE_PS2_DEVICE,
.instance_size = sizeof(PS2MouseState),
.class_init = ps2_mouse_class_init
};
static void ps2_init(Object *obj)
{
PS2State *s = PS2_DEVICE(obj);
qdev_init_gpio_out(DEVICE(obj), &s->irq, 1);
}
static void ps2_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
rc->phases.hold = ps2_reset_hold;
rc->phases.exit = ps2_reset_exit;
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
}
static const TypeInfo ps2_info = {
.name = TYPE_PS2_DEVICE,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_init = ps2_init,
.instance_size = sizeof(PS2State),
.class_init = ps2_class_init,
.class_size = sizeof(PS2DeviceClass),
.abstract = true
};
static void ps2_register_types(void)
{
type_register_static(&ps2_info);
type_register_static(&ps2_kbd_info);
type_register_static(&ps2_mouse_info);
}
type_init(ps2_register_types)
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