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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/hw/input/hid.c
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/hw/input/hid.c')
-rw-r--r--qemu/hw/input/hid.c611
1 files changed, 611 insertions, 0 deletions
diff --git a/qemu/hw/input/hid.c b/qemu/hw/input/hid.c
new file mode 100644
index 000000000..21ebd9e71
--- /dev/null
+++ b/qemu/hw/input/hid.c
@@ -0,0 +1,611 @@
+/*
+ * 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/hw.h"
+#include "ui/console.h"
+#include "qemu/timer.h"
+#include "hw/input/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, 0x39, 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 || hs->idle_pending;
+}
+
+static void hid_idle_timer(void *opaque)
+{
+ HIDState *hs = opaque;
+
+ hs->idle_pending = true;
+ hs->event(hs);
+}
+
+static void hid_del_idle_timer(HIDState *hs)
+{
+ if (hs->idle_timer) {
+ timer_del(hs->idle_timer);
+ timer_free(hs->idle_timer);
+ hs->idle_timer = NULL;
+ }
+}
+
+void hid_set_next_idle(HIDState *hs)
+{
+ if (hs->idle) {
+ uint64_t expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+ get_ticks_per_sec() * hs->idle * 4 / 1000;
+ if (!hs->idle_timer) {
+ hs->idle_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, hid_idle_timer, hs);
+ }
+ timer_mod_ns(hs->idle_timer, expire_time);
+ } else {
+ hid_del_idle_timer(hs);
+ }
+}
+
+static void hid_pointer_event(DeviceState *dev, QemuConsole *src,
+ InputEvent *evt)
+{
+ static const int bmap[INPUT_BUTTON_MAX] = {
+ [INPUT_BUTTON_LEFT] = 0x01,
+ [INPUT_BUTTON_RIGHT] = 0x02,
+ [INPUT_BUTTON_MIDDLE] = 0x04,
+ };
+ HIDState *hs = (HIDState *)dev;
+ HIDPointerEvent *e;
+
+ assert(hs->n < QUEUE_LENGTH);
+ e = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK];
+
+ switch (evt->kind) {
+ case INPUT_EVENT_KIND_REL:
+ if (evt->rel->axis == INPUT_AXIS_X) {
+ e->xdx += evt->rel->value;
+ } else if (evt->rel->axis == INPUT_AXIS_Y) {
+ e->ydy += evt->rel->value;
+ }
+ break;
+
+ case INPUT_EVENT_KIND_ABS:
+ if (evt->rel->axis == INPUT_AXIS_X) {
+ e->xdx = evt->rel->value;
+ } else if (evt->rel->axis == INPUT_AXIS_Y) {
+ e->ydy = evt->rel->value;
+ }
+ break;
+
+ case INPUT_EVENT_KIND_BTN:
+ if (evt->btn->down) {
+ e->buttons_state |= bmap[evt->btn->button];
+ if (evt->btn->button == INPUT_BUTTON_WHEEL_UP) {
+ e->dz--;
+ } else if (evt->btn->button == INPUT_BUTTON_WHEEL_DOWN) {
+ e->dz++;
+ }
+ } else {
+ e->buttons_state &= ~bmap[evt->btn->button];
+ }
+ break;
+
+ default:
+ /* keep gcc happy */
+ break;
+ }
+
+}
+
+static void hid_pointer_sync(DeviceState *dev)
+{
+ HIDState *hs = (HIDState *)dev;
+ HIDPointerEvent *prev, *curr, *next;
+ bool event_compression = false;
+
+ if (hs->n == QUEUE_LENGTH-1) {
+ /*
+ * Queue full. We are losing information, but we at least
+ * keep track of most recent button state.
+ */
+ return;
+ }
+
+ prev = &hs->ptr.queue[(hs->head + hs->n - 1) & QUEUE_MASK];
+ curr = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK];
+ next = &hs->ptr.queue[(hs->head + hs->n + 1) & QUEUE_MASK];
+
+ if (hs->n > 0) {
+ /*
+ * No button state change between previous and current event
+ * (and previous wasn't seen by the guest yet), so there is
+ * motion information only and we can combine the two event
+ * into one.
+ */
+ if (curr->buttons_state == prev->buttons_state) {
+ event_compression = true;
+ }
+ }
+
+ if (event_compression) {
+ /* add current motion to previous, clear current */
+ if (hs->kind == HID_MOUSE) {
+ prev->xdx += curr->xdx;
+ curr->xdx = 0;
+ prev->ydy += curr->ydy;
+ curr->ydy = 0;
+ } else {
+ prev->xdx = curr->xdx;
+ prev->ydy = curr->ydy;
+ }
+ prev->dz += curr->dz;
+ curr->dz = 0;
+ } else {
+ /* prepate next (clear rel, copy abs + btns) */
+ if (hs->kind == HID_MOUSE) {
+ next->xdx = 0;
+ next->ydy = 0;
+ } else {
+ next->xdx = curr->xdx;
+ next->ydy = curr->ydy;
+ }
+ next->dz = 0;
+ next->buttons_state = curr->buttons_state;
+ /* make current guest visible, notify guest */
+ hs->n++;
+ hs->event(hs);
+ }
+}
+
+static void hid_keyboard_event(DeviceState *dev, QemuConsole *src,
+ InputEvent *evt)
+{
+ HIDState *hs = (HIDState *)dev;
+ int scancodes[3], i, count;
+ int slot;
+
+ count = qemu_input_key_value_to_scancode(evt->key->key,
+ evt->key->down,
+ scancodes);
+ if (hs->n + count > QUEUE_LENGTH) {
+ fprintf(stderr, "usb-kbd: warning: key event queue full\n");
+ return;
+ }
+ for (i = 0; i < count; i++) {
+ slot = (hs->head + hs->n) & QUEUE_MASK; hs->n++;
+ hs->kbd.keycodes[slot] = scancodes[i];
+ }
+ hs->event(hs);
+}
+
+static void hid_keyboard_process_keycode(HIDState *hs)
+{
+ uint8_t hid_code, index, 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;
+ index = key | ((hs->kbd.modifiers & (1 << 8)) >> 1);
+ hid_code = hid_usage_keys[index];
+ hs->kbd.modifiers &= ~(1 << 8);
+
+ switch (hid_code) {
+ case 0x00:
+ return;
+
+ case 0xe0:
+ assert(key == 0x1d);
+ if (hs->kbd.modifiers & (1 << 9)) {
+ /* The hid_codes for the 0xe1/0x1d scancode sequence are 0xe9/0xe0.
+ * Here we're processing the second hid_code. By dropping bit 9
+ * and setting bit 8, the scancode after 0x1d will access the
+ * second half of the table.
+ */
+ hs->kbd.modifiers ^= (1 << 8) | (1 << 9);
+ return;
+ }
+ /* fall through to process Ctrl_L */
+ case 0xe1 ... 0xe7:
+ /* Ctrl_L/Ctrl_R, Shift_L/Shift_R, Alt_L/Alt_R, Win_L/Win_R.
+ * Handle releases here, or fall through to process presses.
+ */
+ if (keycode & (1 << 7)) {
+ hs->kbd.modifiers &= ~(1 << (hid_code & 0x0f));
+ return;
+ }
+ /* fall through */
+ case 0xe8 ... 0xe9:
+ /* USB modifiers are just 1 byte long. Bits 8 and 9 of
+ * hs->kbd.modifiers implement a state machine that detects the
+ * 0xe0 and 0xe1/0x1d sequences. These bits do not follow the
+ * usual rules where bit 7 marks released keys; they are cleared
+ * elsewhere in the function as the state machine dictates.
+ */
+ hs->kbd.modifiers |= 1 << (hid_code & 0x0f);
+ return;
+
+ case 0xea ... 0xef:
+ abort();
+
+ default:
+ break;
+ }
+
+ 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_input_handler_activate(hs->s);
+ hs->ptr.mouse_grabbed = 1;
+ }
+}
+
+int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
+{
+ int dx, dy, dz, l;
+ int index;
+ HIDPointerEvent *e;
+
+ hs->idle_pending = false;
+
+ 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;
+
+ 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++] = e->buttons_state;
+ }
+ 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++] = e->buttons_state;
+ }
+ 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)
+{
+ hs->idle_pending = false;
+
+ 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;
+ hs->idle_pending = false;
+ hid_del_idle_timer(hs);
+}
+
+void hid_free(HIDState *hs)
+{
+ qemu_input_handler_unregister(hs->s);
+ hid_del_idle_timer(hs);
+}
+
+static QemuInputHandler hid_keyboard_handler = {
+ .name = "QEMU HID Keyboard",
+ .mask = INPUT_EVENT_MASK_KEY,
+ .event = hid_keyboard_event,
+};
+
+static QemuInputHandler hid_mouse_handler = {
+ .name = "QEMU HID Mouse",
+ .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
+ .event = hid_pointer_event,
+ .sync = hid_pointer_sync,
+};
+
+static QemuInputHandler hid_tablet_handler = {
+ .name = "QEMU HID Tablet",
+ .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
+ .event = hid_pointer_event,
+ .sync = hid_pointer_sync,
+};
+
+void hid_init(HIDState *hs, int kind, HIDEventFunc event)
+{
+ hs->kind = kind;
+ hs->event = event;
+
+ if (hs->kind == HID_KEYBOARD) {
+ hs->s = qemu_input_handler_register((DeviceState *)hs,
+ &hid_keyboard_handler);
+ qemu_input_handler_activate(hs->s);
+ } else if (hs->kind == HID_MOUSE) {
+ hs->s = qemu_input_handler_register((DeviceState *)hs,
+ &hid_mouse_handler);
+ } else if (hs->kind == HID_TABLET) {
+ hs->s = qemu_input_handler_register((DeviceState *)hs,
+ &hid_tablet_handler);
+ }
+}
+
+static int hid_post_load(void *opaque, int version_id)
+{
+ HIDState *s = opaque;
+
+ hid_set_next_idle(s);
+
+ if (s->n == QUEUE_LENGTH && (s->kind == HID_TABLET ||
+ s->kind == HID_MOUSE)) {
+ /*
+ * Handle ptr device migration from old qemu with full queue.
+ *
+ * Throw away everything but the last event, so we propagate
+ * at least the current button state to the guest. Also keep
+ * current position for the tablet, signal "no motion" for the
+ * mouse.
+ */
+ HIDPointerEvent evt;
+ evt = s->ptr.queue[(s->head+s->n) & QUEUE_MASK];
+ if (s->kind == HID_MOUSE) {
+ evt.xdx = 0;
+ evt.ydy = 0;
+ }
+ s->ptr.queue[0] = evt;
+ s->head = 0;
+ s->n = 1;
+ }
+ 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(),
+ }
+};