| /* |
| * 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 "ui/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 || 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) { |
| qemu_del_timer(hs->idle_timer); |
| qemu_free_timer(hs->idle_timer); |
| hs->idle_timer = NULL; |
| } |
| } |
| |
| void hid_set_next_idle(HIDState *hs) |
| { |
| if (hs->idle) { |
| uint64_t expire_time = qemu_get_clock_ns(vm_clock) + |
| get_ticks_per_sec() * hs->idle * 4 / 1000; |
| if (!hs->idle_timer) { |
| hs->idle_timer = qemu_new_timer_ns(vm_clock, hid_idle_timer, hs); |
| } |
| qemu_mod_timer_ns(hs->idle_timer, expire_time); |
| } else { |
| hid_del_idle_timer(hs); |
| } |
| } |
| |
| 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; |
| |
| 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; |
| |
| 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) |
| { |
| 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) |
| { |
| 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; |
| } |
| hid_del_idle_timer(hs); |
| } |
| |
| 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; |
| |
| hid_set_next_idle(s); |
| 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(), |
| } |
| }; |
