| /* |
| * Copyright 2012 Google Inc. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but without any warranty; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <stdio.h> |
| #include <vboot_api.h> |
| |
| #include "base/time.h" |
| #include "debug/gdb/gdb.h" |
| #include "debug/netboot.h" |
| |
| #define CSI_0 0x1B |
| #define CSI_1 0x5B |
| |
| #define KEY_DOWN 0402 |
| #define KEY_UP 0403 |
| #define KEY_LEFT 0404 |
| #define KEY_RIGHT 0405 |
| |
| #define TIMEOUT_US (10 * 1000) // 10ms |
| |
| uint32_t VbExKeyboardReadWithFlags(uint32_t *flags_ptr) |
| { |
| uint64_t timer_start; |
| uint32_t ch; |
| uint32_t flags = 0; |
| |
| if (havekey_trusted()) { |
| ch = getchar_trusted(); |
| flags |= VB_KEY_FLAG_TRUSTED_KEYBOARD; |
| } else if (havekey()) { |
| ch = getchar(); |
| } else { |
| // No input, just give up. |
| return 0; |
| } |
| |
| if (flags_ptr) |
| *flags_ptr = flags; |
| |
| switch (ch) { |
| case '\n': return '\r'; |
| case KEY_UP: return VB_KEY_UP; |
| case KEY_DOWN: return VB_KEY_DOWN; |
| case KEY_RIGHT: return VB_KEY_RIGHT; |
| case KEY_LEFT: return VB_KEY_LEFT; |
| case CSI_0: |
| timer_start = time_us(0); |
| while (!havekey()) { |
| if (time_us(timer_start) >= TIMEOUT_US) |
| return CSI_0; |
| } |
| |
| // Ignore non escape [ sequences. |
| if (getchar() != CSI_1) |
| return CSI_0; |
| |
| // Translate the arrow keys, and ignore everything else. |
| switch (getchar()) { |
| case 'A': return VB_KEY_UP; |
| case 'B': return VB_KEY_DOWN; |
| case 'C': return VB_KEY_RIGHT; |
| case 'D': return VB_KEY_LEFT; |
| default: return 0; |
| } |
| |
| // These two cases only work on developer images (empty stubs otherwise) |
| case 'N' & 0x1f: dc_dev_netboot(); // CTRL+N: netboot |
| case 'G' & 0x1f: gdb_enter(); // CTRL+G: remote GDB mode |
| // fall through for non-developer images as if these didn't exist |
| default: |
| return ch; |
| } |
| } |
| |
| uint32_t VbExKeyboardRead(void) |
| { |
| uint32_t flags; |
| return VbExKeyboardReadWithFlags(&flags); |
| } |