mirror of
https://github.com/qemu/qemu.git
synced 2024-12-05 17:53:36 +08:00
18f88f1195
The code does not have any effect as is, fix it. Spotted by clang analyzer: /src/qemu/hw/hid.c:99:13: warning: Value stored to 'x1' is never read x1 = 1; Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
468 lines
13 KiB
C
468 lines
13 KiB
C
/*
|
|
* QEMU HID devices
|
|
*
|
|
* Copyright (c) 2005 Fabrice Bellard
|
|
* Copyright (c) 2007 OpenMoko, Inc. (andrew@openedhand.com)
|
|
*
|
|
* 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 "hw.h"
|
|
#include "console.h"
|
|
#include "qemu-timer.h"
|
|
#include "hid.h"
|
|
|
|
#define HID_USAGE_ERROR_ROLLOVER 0x01
|
|
#define HID_USAGE_POSTFAIL 0x02
|
|
#define HID_USAGE_ERROR_UNDEFINED 0x03
|
|
|
|
/* Indices are QEMU keycodes, values are from HID Usage Table. Indices
|
|
* above 0x80 are for keys that come after 0xe0 or 0xe1+0x1d or 0xe1+0x9d. */
|
|
static const uint8_t hid_usage_keys[0x100] = {
|
|
0x00, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
|
|
0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b,
|
|
0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c,
|
|
0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16,
|
|
0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33,
|
|
0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19,
|
|
0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55,
|
|
0xe2, 0x2c, 0x32, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e,
|
|
0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f,
|
|
0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59,
|
|
0x5a, 0x5b, 0x62, 0x63, 0x00, 0x00, 0x00, 0x44,
|
|
0x45, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e,
|
|
0xe8, 0xe9, 0x71, 0x72, 0x73, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x85, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65,
|
|
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x58, 0xe4, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x46,
|
|
0xe6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x00, 0x4a,
|
|
0x52, 0x4b, 0x00, 0x50, 0x00, 0x4f, 0x00, 0x4d,
|
|
0x51, 0x4e, 0x49, 0x4c, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
};
|
|
|
|
bool hid_has_events(HIDState *hs)
|
|
{
|
|
return hs->n > 0;
|
|
}
|
|
|
|
void hid_set_next_idle(HIDState *hs, int64_t curtime)
|
|
{
|
|
hs->next_idle_clock = curtime + (get_ticks_per_sec() * hs->idle * 4) / 1000;
|
|
}
|
|
|
|
static void hid_pointer_event_clear(HIDPointerEvent *e, int buttons)
|
|
{
|
|
e->xdx = e->ydy = e->dz = 0;
|
|
e->buttons_state = buttons;
|
|
}
|
|
|
|
static void hid_pointer_event_combine(HIDPointerEvent *e, int xyrel,
|
|
int x1, int y1, int z1) {
|
|
if (xyrel) {
|
|
e->xdx += x1;
|
|
e->ydy += y1;
|
|
} else {
|
|
e->xdx = x1;
|
|
e->ydy = y1;
|
|
/* Windows drivers do not like the 0/0 position and ignore such
|
|
* events. */
|
|
if (!(x1 | y1)) {
|
|
e->xdx = 1;
|
|
}
|
|
}
|
|
e->dz += z1;
|
|
}
|
|
|
|
static void hid_pointer_event(void *opaque,
|
|
int x1, int y1, int z1, int buttons_state)
|
|
{
|
|
HIDState *hs = opaque;
|
|
unsigned use_slot = (hs->head + hs->n - 1) & QUEUE_MASK;
|
|
unsigned previous_slot = (use_slot - 1) & QUEUE_MASK;
|
|
|
|
/* We combine events where feasible to keep the queue small. We shouldn't
|
|
* combine anything with the first event of a particular button state, as
|
|
* that would change the location of the button state change. When the
|
|
* queue is empty, a second event is needed because we don't know if
|
|
* the first event changed the button state. */
|
|
if (hs->n == QUEUE_LENGTH) {
|
|
/* Queue full. Discard old button state, combine motion normally. */
|
|
hs->ptr.queue[use_slot].buttons_state = buttons_state;
|
|
} else if (hs->n < 2 ||
|
|
hs->ptr.queue[use_slot].buttons_state != buttons_state ||
|
|
hs->ptr.queue[previous_slot].buttons_state !=
|
|
hs->ptr.queue[use_slot].buttons_state) {
|
|
/* Cannot or should not combine, so add an empty item to the queue. */
|
|
QUEUE_INCR(use_slot);
|
|
hs->n++;
|
|
hid_pointer_event_clear(&hs->ptr.queue[use_slot], buttons_state);
|
|
}
|
|
hid_pointer_event_combine(&hs->ptr.queue[use_slot],
|
|
hs->kind == HID_MOUSE,
|
|
x1, y1, z1);
|
|
hs->event(hs);
|
|
}
|
|
|
|
static void hid_keyboard_event(void *opaque, int keycode)
|
|
{
|
|
HIDState *hs = opaque;
|
|
int slot;
|
|
|
|
if (hs->n == QUEUE_LENGTH) {
|
|
fprintf(stderr, "usb-kbd: warning: key event queue full\n");
|
|
return;
|
|
}
|
|
slot = (hs->head + hs->n) & QUEUE_MASK; hs->n++;
|
|
hs->kbd.keycodes[slot] = keycode;
|
|
hs->event(hs);
|
|
}
|
|
|
|
static void hid_keyboard_process_keycode(HIDState *hs)
|
|
{
|
|
uint8_t hid_code, key;
|
|
int i, keycode, slot;
|
|
|
|
if (hs->n == 0) {
|
|
return;
|
|
}
|
|
slot = hs->head & QUEUE_MASK; QUEUE_INCR(hs->head); hs->n--;
|
|
keycode = hs->kbd.keycodes[slot];
|
|
|
|
key = keycode & 0x7f;
|
|
hid_code = hid_usage_keys[key | ((hs->kbd.modifiers >> 1) & (1 << 7))];
|
|
hs->kbd.modifiers &= ~(1 << 8);
|
|
|
|
switch (hid_code) {
|
|
case 0x00:
|
|
return;
|
|
|
|
case 0xe0:
|
|
if (hs->kbd.modifiers & (1 << 9)) {
|
|
hs->kbd.modifiers ^= 3 << 8;
|
|
return;
|
|
}
|
|
case 0xe1 ... 0xe7:
|
|
if (keycode & (1 << 7)) {
|
|
hs->kbd.modifiers &= ~(1 << (hid_code & 0x0f));
|
|
return;
|
|
}
|
|
case 0xe8 ... 0xef:
|
|
hs->kbd.modifiers |= 1 << (hid_code & 0x0f);
|
|
return;
|
|
}
|
|
|
|
if (keycode & (1 << 7)) {
|
|
for (i = hs->kbd.keys - 1; i >= 0; i--) {
|
|
if (hs->kbd.key[i] == hid_code) {
|
|
hs->kbd.key[i] = hs->kbd.key[-- hs->kbd.keys];
|
|
hs->kbd.key[hs->kbd.keys] = 0x00;
|
|
break;
|
|
}
|
|
}
|
|
if (i < 0) {
|
|
return;
|
|
}
|
|
} else {
|
|
for (i = hs->kbd.keys - 1; i >= 0; i--) {
|
|
if (hs->kbd.key[i] == hid_code) {
|
|
break;
|
|
}
|
|
}
|
|
if (i < 0) {
|
|
if (hs->kbd.keys < sizeof(hs->kbd.key)) {
|
|
hs->kbd.key[hs->kbd.keys++] = hid_code;
|
|
}
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline int int_clamp(int val, int vmin, int vmax)
|
|
{
|
|
if (val < vmin) {
|
|
return vmin;
|
|
} else if (val > vmax) {
|
|
return vmax;
|
|
} else {
|
|
return val;
|
|
}
|
|
}
|
|
|
|
void hid_pointer_activate(HIDState *hs)
|
|
{
|
|
if (!hs->ptr.mouse_grabbed) {
|
|
qemu_activate_mouse_event_handler(hs->ptr.eh_entry);
|
|
hs->ptr.mouse_grabbed = 1;
|
|
}
|
|
}
|
|
|
|
int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
|
|
{
|
|
int dx, dy, dz, b, l;
|
|
int index;
|
|
HIDPointerEvent *e;
|
|
|
|
hid_pointer_activate(hs);
|
|
|
|
/* When the buffer is empty, return the last event. Relative
|
|
movements will all be zero. */
|
|
index = (hs->n ? hs->head : hs->head - 1);
|
|
e = &hs->ptr.queue[index & QUEUE_MASK];
|
|
|
|
if (hs->kind == HID_MOUSE) {
|
|
dx = int_clamp(e->xdx, -127, 127);
|
|
dy = int_clamp(e->ydy, -127, 127);
|
|
e->xdx -= dx;
|
|
e->ydy -= dy;
|
|
} else {
|
|
dx = e->xdx;
|
|
dy = e->ydy;
|
|
}
|
|
dz = int_clamp(e->dz, -127, 127);
|
|
e->dz -= dz;
|
|
|
|
b = 0;
|
|
if (e->buttons_state & MOUSE_EVENT_LBUTTON) {
|
|
b |= 0x01;
|
|
}
|
|
if (e->buttons_state & MOUSE_EVENT_RBUTTON) {
|
|
b |= 0x02;
|
|
}
|
|
if (e->buttons_state & MOUSE_EVENT_MBUTTON) {
|
|
b |= 0x04;
|
|
}
|
|
|
|
if (hs->n &&
|
|
!e->dz &&
|
|
(hs->kind == HID_TABLET || (!e->xdx && !e->ydy))) {
|
|
/* that deals with this event */
|
|
QUEUE_INCR(hs->head);
|
|
hs->n--;
|
|
}
|
|
|
|
/* Appears we have to invert the wheel direction */
|
|
dz = 0 - dz;
|
|
l = 0;
|
|
switch (hs->kind) {
|
|
case HID_MOUSE:
|
|
if (len > l) {
|
|
buf[l++] = b;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dx;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dy;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dz;
|
|
}
|
|
break;
|
|
|
|
case HID_TABLET:
|
|
if (len > l) {
|
|
buf[l++] = b;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dx & 0xff;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dx >> 8;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dy & 0xff;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dy >> 8;
|
|
}
|
|
if (len > l) {
|
|
buf[l++] = dz;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
|
|
return l;
|
|
}
|
|
|
|
int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len)
|
|
{
|
|
if (len < 2) {
|
|
return 0;
|
|
}
|
|
|
|
hid_keyboard_process_keycode(hs);
|
|
|
|
buf[0] = hs->kbd.modifiers & 0xff;
|
|
buf[1] = 0;
|
|
if (hs->kbd.keys > 6) {
|
|
memset(buf + 2, HID_USAGE_ERROR_ROLLOVER, MIN(8, len) - 2);
|
|
} else {
|
|
memcpy(buf + 2, hs->kbd.key, MIN(8, len) - 2);
|
|
}
|
|
|
|
return MIN(8, len);
|
|
}
|
|
|
|
int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len)
|
|
{
|
|
if (len > 0) {
|
|
int ledstate = 0;
|
|
/* 0x01: Num Lock LED
|
|
* 0x02: Caps Lock LED
|
|
* 0x04: Scroll Lock LED
|
|
* 0x08: Compose LED
|
|
* 0x10: Kana LED */
|
|
hs->kbd.leds = buf[0];
|
|
if (hs->kbd.leds & 0x04) {
|
|
ledstate |= QEMU_SCROLL_LOCK_LED;
|
|
}
|
|
if (hs->kbd.leds & 0x01) {
|
|
ledstate |= QEMU_NUM_LOCK_LED;
|
|
}
|
|
if (hs->kbd.leds & 0x02) {
|
|
ledstate |= QEMU_CAPS_LOCK_LED;
|
|
}
|
|
kbd_put_ledstate(ledstate);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void hid_reset(HIDState *hs)
|
|
{
|
|
switch (hs->kind) {
|
|
case HID_KEYBOARD:
|
|
memset(hs->kbd.keycodes, 0, sizeof(hs->kbd.keycodes));
|
|
memset(hs->kbd.key, 0, sizeof(hs->kbd.key));
|
|
hs->kbd.keys = 0;
|
|
break;
|
|
case HID_MOUSE:
|
|
case HID_TABLET:
|
|
memset(hs->ptr.queue, 0, sizeof(hs->ptr.queue));
|
|
break;
|
|
}
|
|
hs->head = 0;
|
|
hs->n = 0;
|
|
hs->protocol = 1;
|
|
hs->idle = 0;
|
|
}
|
|
|
|
void hid_free(HIDState *hs)
|
|
{
|
|
switch (hs->kind) {
|
|
case HID_KEYBOARD:
|
|
qemu_remove_kbd_event_handler();
|
|
break;
|
|
case HID_MOUSE:
|
|
case HID_TABLET:
|
|
qemu_remove_mouse_event_handler(hs->ptr.eh_entry);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void hid_init(HIDState *hs, int kind, HIDEventFunc event)
|
|
{
|
|
hs->kind = kind;
|
|
hs->event = event;
|
|
|
|
if (hs->kind == HID_KEYBOARD) {
|
|
qemu_add_kbd_event_handler(hid_keyboard_event, hs);
|
|
} else if (hs->kind == HID_MOUSE) {
|
|
hs->ptr.eh_entry = qemu_add_mouse_event_handler(hid_pointer_event, hs,
|
|
0, "QEMU HID Mouse");
|
|
} else if (hs->kind == HID_TABLET) {
|
|
hs->ptr.eh_entry = qemu_add_mouse_event_handler(hid_pointer_event, hs,
|
|
1, "QEMU HID Tablet");
|
|
}
|
|
}
|
|
|
|
static int hid_post_load(void *opaque, int version_id)
|
|
{
|
|
HIDState *s = opaque;
|
|
|
|
if (s->idle) {
|
|
hid_set_next_idle(s, qemu_get_clock_ns(vm_clock));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_hid_ptr_queue = {
|
|
.name = "HIDPointerEventQueue",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_INT32(xdx, HIDPointerEvent),
|
|
VMSTATE_INT32(ydy, HIDPointerEvent),
|
|
VMSTATE_INT32(dz, HIDPointerEvent),
|
|
VMSTATE_INT32(buttons_state, HIDPointerEvent),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
const VMStateDescription vmstate_hid_ptr_device = {
|
|
.name = "HIDPointerDevice",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.post_load = hid_post_load,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_STRUCT_ARRAY(ptr.queue, HIDState, QUEUE_LENGTH, 0,
|
|
vmstate_hid_ptr_queue, HIDPointerEvent),
|
|
VMSTATE_UINT32(head, HIDState),
|
|
VMSTATE_UINT32(n, HIDState),
|
|
VMSTATE_INT32(protocol, HIDState),
|
|
VMSTATE_UINT8(idle, HIDState),
|
|
VMSTATE_END_OF_LIST(),
|
|
}
|
|
};
|
|
|
|
const VMStateDescription vmstate_hid_keyboard_device = {
|
|
.name = "HIDKeyboardDevice",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.post_load = hid_post_load,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT32_ARRAY(kbd.keycodes, HIDState, QUEUE_LENGTH),
|
|
VMSTATE_UINT32(head, HIDState),
|
|
VMSTATE_UINT32(n, HIDState),
|
|
VMSTATE_UINT16(kbd.modifiers, HIDState),
|
|
VMSTATE_UINT8(kbd.leds, HIDState),
|
|
VMSTATE_UINT8_ARRAY(kbd.key, HIDState, 16),
|
|
VMSTATE_INT32(kbd.keys, HIDState),
|
|
VMSTATE_INT32(protocol, HIDState),
|
|
VMSTATE_UINT8(idle, HIDState),
|
|
VMSTATE_END_OF_LIST(),
|
|
}
|
|
};
|