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/*
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* QEMU HID devices
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*
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* Copyright (c) 2005 Fabrice Bellard
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* Copyright (c) 2007 OpenMoko, Inc. (andrew@openedhand.com)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw/hw.h" |
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#include "ui/console.h" |
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#include "qemu/timer.h" |
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#include "hw/input/hid.h" |
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|
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#define HID_USAGE_ERROR_ROLLOVER 0x01 |
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#define HID_USAGE_POSTFAIL 0x02 |
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#define HID_USAGE_ERROR_UNDEFINED 0x03 |
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|
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/* Indices are QEMU keycodes, values are from HID Usage Table. Indices
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* above 0x80 are for keys that come after 0xe0 or 0xe1+0x1d or 0xe1+0x9d. */
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static const uint8_t hid_usage_keys[0x100] = { |
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0x00, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, |
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0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b, |
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0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c, |
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0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16, |
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0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33, |
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0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19, |
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0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55, |
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0xe2, 0x2c, 0x32, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, |
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0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f, |
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0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59, |
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0x5a, 0x5b, 0x62, 0x63, 0x00, 0x00, 0x00, 0x44, |
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0x45, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, |
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0xe8, 0xe9, 0x71, 0x72, 0x73, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x85, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, |
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|
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x58, 0xe4, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x46, |
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0xe6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x00, 0x4a, |
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0x52, 0x4b, 0x00, 0x50, 0x00, 0x4f, 0x00, 0x4d, |
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0x51, 0x4e, 0x49, 0x4c, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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}; |
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|
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bool hid_has_events(HIDState *hs)
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{
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return hs->n > 0 || hs->idle_pending; |
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} |
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|
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static void hid_idle_timer(void *opaque) |
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{
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HIDState *hs = opaque; |
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hs->idle_pending = true;
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hs->event(hs); |
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} |
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|
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static void hid_del_idle_timer(HIDState *hs) |
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{
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if (hs->idle_timer) {
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qemu_del_timer(hs->idle_timer); |
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qemu_free_timer(hs->idle_timer); |
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hs->idle_timer = NULL;
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} |
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} |
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void hid_set_next_idle(HIDState *hs)
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{
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if (hs->idle) {
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uint64_t expire_time = qemu_get_clock_ns(vm_clock) + |
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get_ticks_per_sec() * hs->idle * 4 / 1000; |
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if (!hs->idle_timer) {
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hs->idle_timer = qemu_new_timer_ns(vm_clock, hid_idle_timer, hs); |
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} |
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qemu_mod_timer_ns(hs->idle_timer, expire_time); |
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} else {
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hid_del_idle_timer(hs); |
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} |
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} |
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static void hid_pointer_event_clear(HIDPointerEvent *e, int buttons) |
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{
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e->xdx = e->ydy = e->dz = 0;
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e->buttons_state = buttons; |
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} |
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|
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static void hid_pointer_event_combine(HIDPointerEvent *e, int xyrel, |
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int x1, int y1, int z1) { |
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if (xyrel) {
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e->xdx += x1; |
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e->ydy += y1; |
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} else {
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e->xdx = x1; |
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e->ydy = y1; |
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/* Windows drivers do not like the 0/0 position and ignore such
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* events. */
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if (!(x1 | y1)) {
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e->xdx = 1;
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} |
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} |
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e->dz += z1; |
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} |
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|
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static void hid_pointer_event(void *opaque, |
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int x1, int y1, int z1, int buttons_state) |
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{
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HIDState *hs = opaque; |
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unsigned use_slot = (hs->head + hs->n - 1) & QUEUE_MASK; |
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unsigned previous_slot = (use_slot - 1) & QUEUE_MASK; |
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|
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/* We combine events where feasible to keep the queue small. We shouldn't
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* combine anything with the first event of a particular button state, as
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* that would change the location of the button state change. When the
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* queue is empty, a second event is needed because we don't know if
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* the first event changed the button state. */
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if (hs->n == QUEUE_LENGTH) {
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/* Queue full. Discard old button state, combine motion normally. */
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hs->ptr.queue[use_slot].buttons_state = buttons_state; |
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} else if (hs->n < 2 || |
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hs->ptr.queue[use_slot].buttons_state != buttons_state || |
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hs->ptr.queue[previous_slot].buttons_state != |
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hs->ptr.queue[use_slot].buttons_state) {
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/* Cannot or should not combine, so add an empty item to the queue. */
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QUEUE_INCR(use_slot); |
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hs->n++; |
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hid_pointer_event_clear(&hs->ptr.queue[use_slot], buttons_state); |
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} |
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hid_pointer_event_combine(&hs->ptr.queue[use_slot], |
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hs->kind == HID_MOUSE, |
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x1, y1, z1); |
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hs->event(hs); |
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} |
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|
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static void hid_keyboard_event(void *opaque, int keycode) |
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{
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HIDState *hs = opaque; |
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int slot;
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if (hs->n == QUEUE_LENGTH) {
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fprintf(stderr, "usb-kbd: warning: key event queue full\n");
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return;
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} |
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slot = (hs->head + hs->n) & QUEUE_MASK; hs->n++; |
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hs->kbd.keycodes[slot] = keycode; |
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hs->event(hs); |
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} |
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|
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static void hid_keyboard_process_keycode(HIDState *hs) |
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{
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uint8_t hid_code, key; |
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int i, keycode, slot;
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|
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if (hs->n == 0) { |
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return;
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} |
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slot = hs->head & QUEUE_MASK; QUEUE_INCR(hs->head); hs->n--; |
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keycode = hs->kbd.keycodes[slot]; |
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|
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key = keycode & 0x7f;
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hid_code = hid_usage_keys[key | ((hs->kbd.modifiers >> 1) & (1 << 7))]; |
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hs->kbd.modifiers &= ~(1 << 8); |
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|
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switch (hid_code) {
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case 0x00: |
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return;
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|
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case 0xe0: |
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if (hs->kbd.modifiers & (1 << 9)) { |
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hs->kbd.modifiers ^= 3 << 8; |
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return;
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} |
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case 0xe1 ... 0xe7: |
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if (keycode & (1 << 7)) { |
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hs->kbd.modifiers &= ~(1 << (hid_code & 0x0f)); |
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return;
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} |
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case 0xe8 ... 0xef: |
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hs->kbd.modifiers |= 1 << (hid_code & 0x0f); |
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return;
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} |
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|
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if (keycode & (1 << 7)) { |
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for (i = hs->kbd.keys - 1; i >= 0; i--) { |
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if (hs->kbd.key[i] == hid_code) {
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hs->kbd.key[i] = hs->kbd.key[-- hs->kbd.keys]; |
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hs->kbd.key[hs->kbd.keys] = 0x00;
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break;
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} |
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} |
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if (i < 0) { |
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return;
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} |
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} else {
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for (i = hs->kbd.keys - 1; i >= 0; i--) { |
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if (hs->kbd.key[i] == hid_code) {
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break;
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} |
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} |
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if (i < 0) { |
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if (hs->kbd.keys < sizeof(hs->kbd.key)) { |
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hs->kbd.key[hs->kbd.keys++] = hid_code; |
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} |
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} else {
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return;
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} |
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} |
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} |
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|
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static inline int int_clamp(int val, int vmin, int vmax) |
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{
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if (val < vmin) {
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return vmin;
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} else if (val > vmax) { |
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return vmax;
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} else {
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return val;
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} |
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} |
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|
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void hid_pointer_activate(HIDState *hs)
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{
|
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if (!hs->ptr.mouse_grabbed) {
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qemu_activate_mouse_event_handler(hs->ptr.eh_entry); |
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hs->ptr.mouse_grabbed = 1;
|
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} |
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} |
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|
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int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len) |
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{
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int dx, dy, dz, b, l;
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int index;
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HIDPointerEvent *e; |
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|
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hs->idle_pending = false;
|
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|
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hid_pointer_activate(hs); |
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|
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/* When the buffer is empty, return the last event. Relative
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movements will all be zero. */
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index = (hs->n ? hs->head : hs->head - 1);
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e = &hs->ptr.queue[index & QUEUE_MASK]; |
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|
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if (hs->kind == HID_MOUSE) {
|
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dx = int_clamp(e->xdx, -127, 127); |
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dy = int_clamp(e->ydy, -127, 127); |
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e->xdx -= dx; |
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e->ydy -= dy; |
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} else {
|
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dx = e->xdx; |
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dy = e->ydy; |
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} |
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dz = int_clamp(e->dz, -127, 127); |
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e->dz -= dz; |
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|
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b = 0;
|
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if (e->buttons_state & MOUSE_EVENT_LBUTTON) {
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b |= 0x01;
|
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} |
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if (e->buttons_state & MOUSE_EVENT_RBUTTON) {
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b |= 0x02;
|
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} |
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if (e->buttons_state & MOUSE_EVENT_MBUTTON) {
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b |= 0x04;
|
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} |
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|
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if (hs->n &&
|
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!e->dz && |
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(hs->kind == HID_TABLET || (!e->xdx && !e->ydy))) {
|
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/* that deals with this event */
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QUEUE_INCR(hs->head); |
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hs->n--; |
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} |
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|
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/* Appears we have to invert the wheel direction */
|
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dz = 0 - dz;
|
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l = 0;
|
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switch (hs->kind) {
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case HID_MOUSE:
|
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if (len > l) {
|
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buf[l++] = b; |
| 308 |
} |
| 309 |
if (len > l) {
|
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buf[l++] = dx; |
| 311 |
} |
| 312 |
if (len > l) {
|
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buf[l++] = dy; |
| 314 |
} |
| 315 |
if (len > l) {
|
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buf[l++] = dz; |
| 317 |
} |
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break;
|
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|
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case HID_TABLET:
|
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if (len > l) {
|
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buf[l++] = b; |
| 323 |
} |
| 324 |
if (len > l) {
|
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buf[l++] = dx & 0xff;
|
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} |
| 327 |
if (len > l) {
|
| 328 |
buf[l++] = dx >> 8;
|
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} |
| 330 |
if (len > l) {
|
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buf[l++] = dy & 0xff;
|
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} |
| 333 |
if (len > l) {
|
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buf[l++] = dy >> 8;
|
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} |
| 336 |
if (len > l) {
|
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buf[l++] = dz; |
| 338 |
} |
| 339 |
break;
|
| 340 |
|
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default:
|
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abort(); |
| 343 |
} |
| 344 |
|
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return l;
|
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} |
| 347 |
|
| 348 |
int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len) |
| 349 |
{
|
| 350 |
hs->idle_pending = false;
|
| 351 |
|
| 352 |
if (len < 2) { |
| 353 |
return 0; |
| 354 |
} |
| 355 |
|
| 356 |
hid_keyboard_process_keycode(hs); |
| 357 |
|
| 358 |
buf[0] = hs->kbd.modifiers & 0xff; |
| 359 |
buf[1] = 0; |
| 360 |
if (hs->kbd.keys > 6) { |
| 361 |
memset(buf + 2, HID_USAGE_ERROR_ROLLOVER, MIN(8, len) - 2); |
| 362 |
} else {
|
| 363 |
memcpy(buf + 2, hs->kbd.key, MIN(8, len) - 2); |
| 364 |
} |
| 365 |
|
| 366 |
return MIN(8, len); |
| 367 |
} |
| 368 |
|
| 369 |
int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len) |
| 370 |
{
|
| 371 |
if (len > 0) { |
| 372 |
int ledstate = 0; |
| 373 |
/* 0x01: Num Lock LED
|
| 374 |
* 0x02: Caps Lock LED
|
| 375 |
* 0x04: Scroll Lock LED
|
| 376 |
* 0x08: Compose LED
|
| 377 |
* 0x10: Kana LED */
|
| 378 |
hs->kbd.leds = buf[0];
|
| 379 |
if (hs->kbd.leds & 0x04) { |
| 380 |
ledstate |= QEMU_SCROLL_LOCK_LED; |
| 381 |
} |
| 382 |
if (hs->kbd.leds & 0x01) { |
| 383 |
ledstate |= QEMU_NUM_LOCK_LED; |
| 384 |
} |
| 385 |
if (hs->kbd.leds & 0x02) { |
| 386 |
ledstate |= QEMU_CAPS_LOCK_LED; |
| 387 |
} |
| 388 |
kbd_put_ledstate(ledstate); |
| 389 |
} |
| 390 |
return 0; |
| 391 |
} |
| 392 |
|
| 393 |
void hid_reset(HIDState *hs)
|
| 394 |
{
|
| 395 |
switch (hs->kind) {
|
| 396 |
case HID_KEYBOARD:
|
| 397 |
memset(hs->kbd.keycodes, 0, sizeof(hs->kbd.keycodes)); |
| 398 |
memset(hs->kbd.key, 0, sizeof(hs->kbd.key)); |
| 399 |
hs->kbd.keys = 0;
|
| 400 |
break;
|
| 401 |
case HID_MOUSE:
|
| 402 |
case HID_TABLET:
|
| 403 |
memset(hs->ptr.queue, 0, sizeof(hs->ptr.queue)); |
| 404 |
break;
|
| 405 |
} |
| 406 |
hs->head = 0;
|
| 407 |
hs->n = 0;
|
| 408 |
hs->protocol = 1;
|
| 409 |
hs->idle = 0;
|
| 410 |
hs->idle_pending = false;
|
| 411 |
hid_del_idle_timer(hs); |
| 412 |
} |
| 413 |
|
| 414 |
void hid_free(HIDState *hs)
|
| 415 |
{
|
| 416 |
switch (hs->kind) {
|
| 417 |
case HID_KEYBOARD:
|
| 418 |
qemu_remove_kbd_event_handler(); |
| 419 |
break;
|
| 420 |
case HID_MOUSE:
|
| 421 |
case HID_TABLET:
|
| 422 |
qemu_remove_mouse_event_handler(hs->ptr.eh_entry); |
| 423 |
break;
|
| 424 |
} |
| 425 |
hid_del_idle_timer(hs); |
| 426 |
} |
| 427 |
|
| 428 |
void hid_init(HIDState *hs, int kind, HIDEventFunc event) |
| 429 |
{
|
| 430 |
hs->kind = kind; |
| 431 |
hs->event = event; |
| 432 |
|
| 433 |
if (hs->kind == HID_KEYBOARD) {
|
| 434 |
qemu_add_kbd_event_handler(hid_keyboard_event, hs); |
| 435 |
} else if (hs->kind == HID_MOUSE) { |
| 436 |
hs->ptr.eh_entry = qemu_add_mouse_event_handler(hid_pointer_event, hs, |
| 437 |
0, "QEMU HID Mouse"); |
| 438 |
} else if (hs->kind == HID_TABLET) { |
| 439 |
hs->ptr.eh_entry = qemu_add_mouse_event_handler(hid_pointer_event, hs, |
| 440 |
1, "QEMU HID Tablet"); |
| 441 |
} |
| 442 |
} |
| 443 |
|
| 444 |
static int hid_post_load(void *opaque, int version_id) |
| 445 |
{
|
| 446 |
HIDState *s = opaque; |
| 447 |
|
| 448 |
hid_set_next_idle(s); |
| 449 |
return 0; |
| 450 |
} |
| 451 |
|
| 452 |
static const VMStateDescription vmstate_hid_ptr_queue = { |
| 453 |
.name = "HIDPointerEventQueue",
|
| 454 |
.version_id = 1,
|
| 455 |
.minimum_version_id = 1,
|
| 456 |
.fields = (VMStateField[]) {
|
| 457 |
VMSTATE_INT32(xdx, HIDPointerEvent), |
| 458 |
VMSTATE_INT32(ydy, HIDPointerEvent), |
| 459 |
VMSTATE_INT32(dz, HIDPointerEvent), |
| 460 |
VMSTATE_INT32(buttons_state, HIDPointerEvent), |
| 461 |
VMSTATE_END_OF_LIST() |
| 462 |
} |
| 463 |
}; |
| 464 |
|
| 465 |
const VMStateDescription vmstate_hid_ptr_device = {
|
| 466 |
.name = "HIDPointerDevice",
|
| 467 |
.version_id = 1,
|
| 468 |
.minimum_version_id = 1,
|
| 469 |
.post_load = hid_post_load, |
| 470 |
.fields = (VMStateField[]) {
|
| 471 |
VMSTATE_STRUCT_ARRAY(ptr.queue, HIDState, QUEUE_LENGTH, 0,
|
| 472 |
vmstate_hid_ptr_queue, HIDPointerEvent), |
| 473 |
VMSTATE_UINT32(head, HIDState), |
| 474 |
VMSTATE_UINT32(n, HIDState), |
| 475 |
VMSTATE_INT32(protocol, HIDState), |
| 476 |
VMSTATE_UINT8(idle, HIDState), |
| 477 |
VMSTATE_END_OF_LIST(), |
| 478 |
} |
| 479 |
}; |
| 480 |
|
| 481 |
const VMStateDescription vmstate_hid_keyboard_device = {
|
| 482 |
.name = "HIDKeyboardDevice",
|
| 483 |
.version_id = 1,
|
| 484 |
.minimum_version_id = 1,
|
| 485 |
.post_load = hid_post_load, |
| 486 |
.fields = (VMStateField[]) {
|
| 487 |
VMSTATE_UINT32_ARRAY(kbd.keycodes, HIDState, QUEUE_LENGTH), |
| 488 |
VMSTATE_UINT32(head, HIDState), |
| 489 |
VMSTATE_UINT32(n, HIDState), |
| 490 |
VMSTATE_UINT16(kbd.modifiers, HIDState), |
| 491 |
VMSTATE_UINT8(kbd.leds, HIDState), |
| 492 |
VMSTATE_UINT8_ARRAY(kbd.key, HIDState, 16),
|
| 493 |
VMSTATE_INT32(kbd.keys, HIDState), |
| 494 |
VMSTATE_INT32(protocol, HIDState), |
| 495 |
VMSTATE_UINT8(idle, HIDState), |
| 496 |
VMSTATE_END_OF_LIST(), |
| 497 |
} |
| 498 |
}; |