| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <zircon/status.h> |
| |
| #include <iterator> |
| |
| #include <ddk/debug.h> |
| #include <fbl/algorithm.h> |
| |
| #include "input.h" |
| #include "src/devices/bus/lib/virtio/trace.h" |
| |
| #define LOCAL_TRACE 0 |
| |
| namespace virtio { |
| |
| // clang-format off |
| |
| // These are Linux input event codes: |
| // https://github.com/torvalds/linux/blob/HEAD/include/uapi/linux/input-event-codes.h |
| const uint8_t kEventCodeMap[] = { |
| 0, // KEY_RESERVED (0) |
| 41, // KEY_ESC (1) |
| 30, // KEY_1 (2) |
| 31, // KEY_2 (3) |
| 32, // KEY_3 (4) |
| 33, // KEY_4 (5) |
| 34, // KEY_5 (6) |
| 35, // KEY_6 (7) |
| 36, // KEY_7 (8) |
| 37, // KEY_8 (9) |
| 38, // KEY_9 (10) |
| 39, // KEY_0 (11) |
| 45, // KEY_MINUS (12) |
| 46, // KEY_EQUAL (13) |
| 42, // KEY_BACKSPACE (14) |
| 43, // KEY_TAB (15) |
| 20, // KEY_Q (16) |
| 26, // KEY_W (17) |
| 8, // KEY_E (18) |
| 21, // KEY_R (19) |
| 23, // KEY_T (20) |
| 28, // KEY_Y (21) |
| 24, // KEY_U (22) |
| 12, // KEY_I (23) |
| 18, // KEY_O (24) |
| 19, // KEY_P (25) |
| 47, // KEY_LEFTBRACE (26) |
| 48, // KEY_RIGHTBRACE (27) |
| 40, // KEY_ENTER (28) |
| 224, // KEY_LEFTCTRL (29) |
| 4, // KEY_A (30) |
| 22, // KEY_S (31) |
| 7, // KEY_D (32) |
| 9, // KEY_F (33) |
| 10, // KEY_G (34) |
| 11, // KEY_H (35) |
| 13, // KEY_J (36) |
| 14, // KEY_K (37) |
| 15, // KEY_L (38) |
| 51, // KEY_SEMICOLON (39) |
| 52, // KEY_APOSTROPHE (40) |
| 53, // KEY_GRAVE (41) |
| 225, // KEY_LEFTSHIFT (42) |
| 49, // KEY_BACKSLASH (43) |
| 29, // KEY_Z (44) |
| 27, // KEY_X (45) |
| 6, // KEY_C (46) |
| 25, // KEY_V (47) |
| 5, // KEY_B (48) |
| 17, // KEY_N (49) |
| 16, // KEY_M (50) |
| 54, // KEY_COMMA (51) |
| 55, // KEY_DOT (52) |
| 56, // KEY_SLASH (53) |
| 229, // KEY_RIGHTSHIFT (54) |
| 85, // KEY_KPASTERISK (55) |
| 226, // KEY_LEFTALT (56) |
| 44, // KEY_SPACE (57) |
| 57, // KEY_CAPSLOCK (58) |
| 58, // KEY_F1 (59) |
| 59, // KEY_F2 (60) |
| 60, // KEY_F3 (61) |
| 61, // KEY_F4 (62) |
| 62, // KEY_F5 (63) |
| 63, // KEY_F6 (64) |
| 64, // KEY_F7 (65) |
| 65, // KEY_F8 (66) |
| 66, // KEY_F9 (67) |
| 67, // KEY_F10 (68) |
| 83, // KEY_NUMLOCK (69) |
| 71, // KEY_SCROLLLOCK (70) |
| 95, // KEY_KP7 (71) |
| 96, // KEY_KP8 (72) |
| 97, // KEY_KP9 (73) |
| 86, // KEY_KPMINUS (74) |
| 92, // KEY_KP4 (75) |
| 93, // KEY_KP5 (76) |
| 94, // KEY_KP6 (77) |
| 87, // KEY_KPPLUS (78) |
| 89, // KEY_KP1 (79) |
| 90, // KEY_KP2 (80) |
| 91, // KEY_KP3 (81) |
| 98, // KEY_KP0 (82) |
| 99, // KEY_KPDOT (83) |
| 0, 0, 0, 0, 0, 0, // Unsupported |
| 0, 0, 0, 0, 0, 0, 0, // Unsupported |
| 228, // KEY_RIGHTCTRL (97) |
| 0, 0, // Unsupported |
| 230, // KEY_RIGHTALT (100) |
| 0, 0, // Unsupported |
| 82, // KEY_UP (103) |
| 0, // Unsupported |
| 80, // KEY_LEFT (105) |
| 79, // KEY_RIGHT (106) |
| 0, // Unsupported |
| 81, // KEY_DOWN (108) |
| 78, // KEY_PAGEDOWN (109) |
| 73, // KEY_INSERT (110) |
| 76, // KEY_DELETE (111) |
| 0, 0, 0, 0, 0, 0, 0, // Unsupported |
| 72, // KEY_PAUSE (119) |
| 0, 0, 0, 0, 0, // Unsupported |
| 227, // KEY_LEFTMETA (125) |
| 231, // KEY_RIGHTMETA (126) |
| }; |
| |
| static const uint8_t kbd_hid_report_desc[] = { |
| 0x05, 0x01, // Usage Page (Generic Desktop Ctrls) |
| 0x09, 0x06, // Usage (Keyboard) |
| 0xA1, 0x01, // Collection (Application) |
| 0x05, 0x07, // Usage Page (Kbrd/Keypad) |
| 0x95, 0x05, // Report Count (5) |
| 0x75, 0x01, // Report Size (1) |
| 0x05, 0x08, // Usage Page (LEDs) |
| 0x19, 0x01, // Usage Minimum (Num Lock) |
| 0x29, 0x05, // Usage Maximum (Kana) |
| 0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position, |
| // Non-volatile) |
| 0x95, 0x01, // Report Count (1) |
| 0x75, 0x03, // Report Size (3) |
| 0x91, 0x01, // Output (Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position, |
| // Non-volatile) |
| 0x95, 0x06, // Report Count (6) |
| 0x75, 0x08, // Report Size (8) |
| 0x15, 0x00, // Logical Minimum (0) |
| 0x26, 0xFF, 0x00, // Logical Maximum (255) |
| 0x05, 0x07, // Usage Page (Kbrd/Keypad) |
| 0x19, 0x00, // Usage Minimum (0x00) |
| 0x2A, 0xFF, 0x00, // Usage Maximum (0xFF) |
| 0x81, 0x00, // Input (Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position) |
| 0xC0, // End Collection |
| }; |
| |
| // clang-format on |
| |
| zx_status_t HidKeyboard::GetDescriptor(uint8_t desc_type, void* out_data_buffer, size_t data_size, |
| size_t* out_data_actual) { |
| if (out_data_buffer == nullptr || out_data_actual == nullptr) { |
| return ZX_ERR_INVALID_ARGS; |
| } |
| |
| if (desc_type != HID_DESCRIPTION_TYPE_REPORT) { |
| return ZX_ERR_NOT_FOUND; |
| } |
| |
| if (data_size < sizeof(kbd_hid_report_desc)) { |
| return ZX_ERR_BUFFER_TOO_SMALL; |
| } |
| memcpy(out_data_buffer, kbd_hid_report_desc, sizeof(kbd_hid_report_desc)); |
| *out_data_actual = sizeof(kbd_hid_report_desc); |
| return ZX_OK; |
| } |
| |
| void HidKeyboard::AddKeypressToReport(uint16_t event_code) { |
| uint8_t hid_code = kEventCodeMap[event_code]; |
| for (size_t i = 0; i != 6; ++i) { |
| if (report_.usage[i] == hid_code) { |
| // The key already exists in the report so we ignore it. |
| return; |
| } |
| if (report_.usage[i] == 0) { |
| report_.usage[i] = hid_code; |
| return; |
| } |
| } |
| |
| // There's no free slot in the report. |
| // TODO: Record a rollover status. |
| } |
| |
| void HidKeyboard::RemoveKeypressFromReport(uint16_t event_code) { |
| uint8_t hid_code = kEventCodeMap[event_code]; |
| int id = -1; |
| for (int i = 0; i != 6; ++i) { |
| if (report_.usage[i] == hid_code) { |
| id = i; |
| break; |
| } |
| } |
| |
| if (id == -1) { |
| // They key is not in the report so we ignore it. |
| return; |
| } |
| |
| for (size_t i = id; i != 5; ++i) { |
| report_.usage[i] = report_.usage[i + 1]; |
| } |
| report_.usage[5] = 0; |
| } |
| |
| void HidKeyboard::ReceiveEvent(virtio_input_event_t* event) { |
| if (event->type != VIRTIO_INPUT_EV_KEY) { |
| return; |
| } |
| if (event->code == 0) { |
| return; |
| } |
| if (event->code >= std::size(kEventCodeMap)) { |
| LTRACEF("unknown key\n"); |
| return; |
| } |
| if (event->value == VIRTIO_INPUT_EV_KEY_PRESSED) { |
| AddKeypressToReport(event->code); |
| } else if (event->value == VIRTIO_INPUT_EV_KEY_RELEASED) { |
| RemoveKeypressFromReport(event->code); |
| } |
| } |
| |
| const uint8_t* HidKeyboard::GetReport(size_t* size) { |
| *size = sizeof(report_); |
| return reinterpret_cast<const uint8_t*>(&report_); |
| } |
| |
| } // namespace virtio |
