1 // SPDX-License-Identifier: GPL-2.0+
3 * EFI application console interface
5 * Copyright (c) 2016 Alexander Graf
10 #include <dm/device.h>
11 #include <efi_loader.h>
13 #include <stdio_dev.h>
14 #include <video_console.h>
16 #define EFI_COUT_MODE_2 2
17 #define EFI_MAX_COUT_MODE 3
20 unsigned long columns;
25 static struct cout_mode efi_cout_modes[] = {
26 /* EFI Mode 0 is 80x25 and always present */
32 /* EFI Mode 1 is always 80x50 */
38 /* Value are unknown until we query the console */
46 const efi_guid_t efi_guid_text_input_ex_protocol =
47 EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID;
48 const efi_guid_t efi_guid_text_input_protocol =
49 EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID;
50 const efi_guid_t efi_guid_text_output_protocol =
51 EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID;
56 /* Default to mode 0 */
57 static struct simple_text_output_mode efi_con_mode = {
66 static int term_get_char(s32 *c)
70 /* Wait up to 100 ms for a character */
71 timeout = timer_get_us() + 100000;
74 if (timer_get_us() > timeout)
82 * Receive and parse a reply from the terminal.
84 * @n: array of return values
85 * @num: number of return values expected
86 * @end_char: character indicating end of terminal message
87 * @return: non-zero indicates error
89 static int term_read_reply(int *n, int num, char end_char)
94 if (term_get_char(&c) || c != cESC)
97 if (term_get_char(&c) || c != '[')
102 if (!term_get_char(&c)) {
109 } else if (c == end_char) {
111 } else if (c > '9' || c < '0') {
115 /* Read one more decimal position */
128 static efi_status_t EFIAPI efi_cout_output_string(
129 struct efi_simple_text_output_protocol *this,
130 const efi_string_t string)
132 struct simple_text_output_mode *con = &efi_con_mode;
133 struct cout_mode *mode = &efi_cout_modes[con->mode];
136 efi_status_t ret = EFI_SUCCESS;
138 EFI_ENTRY("%p, %p", this, string);
140 if (!this || !string) {
141 ret = EFI_INVALID_PARAMETER;
145 buf = malloc(utf16_utf8_strlen(string) + 1);
147 ret = EFI_OUT_OF_RESOURCES;
151 utf16_utf8_strcpy(&pos, string);
156 * Update the cursor position.
158 * The UEFI spec provides advance rules for U+0000, U+0008, U+000A,
159 * and U000D. All other control characters are ignored. Any non-control
160 * character increase the column by one.
162 for (p = string; *p; ++p) {
164 case '\b': /* U+0008, backspace */
165 if (con->cursor_column)
166 con->cursor_column--;
168 case '\n': /* U+000A, newline */
169 con->cursor_column = 0;
172 case '\r': /* U+000D, carriage-return */
173 con->cursor_column = 0;
175 case 0xd800 ... 0xdbff:
177 * Ignore high surrogates, we do not want to count a
178 * Unicode character twice.
182 /* Exclude control codes */
184 con->cursor_column++;
187 if (con->cursor_column >= mode->columns) {
188 con->cursor_column = 0;
192 * When we exceed the row count the terminal will scroll up one
193 * line. We have to adjust the cursor position.
195 if (con->cursor_row >= mode->rows && con->cursor_row)
200 return EFI_EXIT(ret);
203 static efi_status_t EFIAPI efi_cout_test_string(
204 struct efi_simple_text_output_protocol *this,
205 const efi_string_t string)
207 EFI_ENTRY("%p, %p", this, string);
208 return EFI_EXIT(EFI_SUCCESS);
211 static bool cout_mode_matches(struct cout_mode *mode, int rows, int cols)
216 return (mode->rows == rows) && (mode->columns == cols);
220 * query_console_serial() - query console size
222 * @rows pointer to return number of rows
223 * @columns pointer to return number of columns
224 * Returns 0 on success
226 static int query_console_serial(int *rows, int *cols)
231 /* Empty input buffer */
236 * Not all terminals understand CSI [18t for querying the console size.
237 * We should adhere to escape sequences documented in the console_codes
238 * man page and the ECMA-48 standard.
240 * So here we follow a different approach. We position the cursor to the
241 * bottom right and query its position. Before leaving the function we
242 * restore the original cursor position.
244 printf(ESC "7" /* Save cursor position */
245 ESC "[r" /* Set scrolling region to full window */
246 ESC "[999;999H" /* Move to bottom right corner */
247 ESC "[6n"); /* Query cursor position */
249 /* Read {rows,cols} */
250 if (term_read_reply(n, 2, 'R')) {
258 printf(ESC "8"); /* Restore cursor position */
263 * Update the mode table.
265 * By default the only mode available is 80x25. If the console has at least 50
266 * lines, enable mode 80x50. If we can query the console size and it is neither
267 * 80x25 nor 80x50, set it as an additional mode.
269 static void query_console_size(void)
271 const char *stdout_name = env_get("stdout");
272 int rows = 25, cols = 80;
274 if (stdout_name && !strcmp(stdout_name, "vidconsole") &&
275 IS_ENABLED(CONFIG_DM_VIDEO)) {
276 struct stdio_dev *stdout_dev =
277 stdio_get_by_name("vidconsole");
278 struct udevice *dev = stdout_dev->priv;
279 struct vidconsole_priv *priv =
280 dev_get_uclass_priv(dev);
283 } else if (query_console_serial(&rows, &cols)) {
287 /* Test if we can have Mode 1 */
288 if (cols >= 80 && rows >= 50) {
289 efi_cout_modes[1].present = 1;
290 efi_con_mode.max_mode = 2;
294 * Install our mode as mode 2 if it is different
295 * than mode 0 or 1 and set it as the currently selected mode
297 if (!cout_mode_matches(&efi_cout_modes[0], rows, cols) &&
298 !cout_mode_matches(&efi_cout_modes[1], rows, cols)) {
299 efi_cout_modes[EFI_COUT_MODE_2].columns = cols;
300 efi_cout_modes[EFI_COUT_MODE_2].rows = rows;
301 efi_cout_modes[EFI_COUT_MODE_2].present = 1;
302 efi_con_mode.max_mode = EFI_MAX_COUT_MODE;
303 efi_con_mode.mode = EFI_COUT_MODE_2;
307 static efi_status_t EFIAPI efi_cout_query_mode(
308 struct efi_simple_text_output_protocol *this,
309 unsigned long mode_number, unsigned long *columns,
312 EFI_ENTRY("%p, %ld, %p, %p", this, mode_number, columns, rows);
314 if (mode_number >= efi_con_mode.max_mode)
315 return EFI_EXIT(EFI_UNSUPPORTED);
317 if (efi_cout_modes[mode_number].present != 1)
318 return EFI_EXIT(EFI_UNSUPPORTED);
321 *columns = efi_cout_modes[mode_number].columns;
323 *rows = efi_cout_modes[mode_number].rows;
325 return EFI_EXIT(EFI_SUCCESS);
328 static const struct {
332 { 30, 40 }, /* 0: black */
333 { 34, 44 }, /* 1: blue */
334 { 32, 42 }, /* 2: green */
335 { 36, 46 }, /* 3: cyan */
336 { 31, 41 }, /* 4: red */
337 { 35, 45 }, /* 5: magenta */
338 { 33, 43 }, /* 6: brown, map to yellow as EDK2 does*/
339 { 37, 47 }, /* 7: light gray, map to white */
342 /* See EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetAttribute(). */
343 static efi_status_t EFIAPI efi_cout_set_attribute(
344 struct efi_simple_text_output_protocol *this,
345 unsigned long attribute)
347 unsigned int bold = EFI_ATTR_BOLD(attribute);
348 unsigned int fg = EFI_ATTR_FG(attribute);
349 unsigned int bg = EFI_ATTR_BG(attribute);
351 EFI_ENTRY("%p, %lx", this, attribute);
353 efi_con_mode.attribute = attribute;
355 printf(ESC"[%u;%u;%um", bold, color[fg].fg, color[bg].bg);
357 printf(ESC"[0;37;40m");
359 return EFI_EXIT(EFI_SUCCESS);
362 static efi_status_t EFIAPI efi_cout_clear_screen(
363 struct efi_simple_text_output_protocol *this)
365 EFI_ENTRY("%p", this);
368 efi_con_mode.cursor_column = 0;
369 efi_con_mode.cursor_row = 0;
371 return EFI_EXIT(EFI_SUCCESS);
374 static efi_status_t EFIAPI efi_cout_set_mode(
375 struct efi_simple_text_output_protocol *this,
376 unsigned long mode_number)
378 EFI_ENTRY("%p, %ld", this, mode_number);
380 if (mode_number >= efi_con_mode.max_mode)
381 return EFI_EXIT(EFI_UNSUPPORTED);
382 efi_con_mode.mode = mode_number;
383 EFI_CALL(efi_cout_clear_screen(this));
385 return EFI_EXIT(EFI_SUCCESS);
388 static efi_status_t EFIAPI efi_cout_reset(
389 struct efi_simple_text_output_protocol *this,
390 char extended_verification)
392 EFI_ENTRY("%p, %d", this, extended_verification);
395 EFI_CALL(efi_cout_clear_screen(this));
396 /* Set default colors */
397 efi_con_mode.attribute = 0x07;
398 printf(ESC "[0;37;40m");
400 return EFI_EXIT(EFI_SUCCESS);
403 static efi_status_t EFIAPI efi_cout_set_cursor_position(
404 struct efi_simple_text_output_protocol *this,
405 unsigned long column, unsigned long row)
407 efi_status_t ret = EFI_SUCCESS;
408 struct simple_text_output_mode *con = &efi_con_mode;
409 struct cout_mode *mode = &efi_cout_modes[con->mode];
411 EFI_ENTRY("%p, %ld, %ld", this, column, row);
413 /* Check parameters */
415 ret = EFI_INVALID_PARAMETER;
418 if (row >= mode->rows || column >= mode->columns) {
419 ret = EFI_UNSUPPORTED;
424 * Set cursor position by sending CSI H.
425 * EFI origin is [0, 0], terminal origin is [1, 1].
427 printf(ESC "[%d;%dH", (int)row + 1, (int)column + 1);
428 efi_con_mode.cursor_column = column;
429 efi_con_mode.cursor_row = row;
431 return EFI_EXIT(ret);
434 static efi_status_t EFIAPI efi_cout_enable_cursor(
435 struct efi_simple_text_output_protocol *this,
438 EFI_ENTRY("%p, %d", this, enable);
440 printf(ESC"[?25%c", enable ? 'h' : 'l');
441 efi_con_mode.cursor_visible = !!enable;
443 return EFI_EXIT(EFI_SUCCESS);
446 struct efi_simple_text_output_protocol efi_con_out = {
447 .reset = efi_cout_reset,
448 .output_string = efi_cout_output_string,
449 .test_string = efi_cout_test_string,
450 .query_mode = efi_cout_query_mode,
451 .set_mode = efi_cout_set_mode,
452 .set_attribute = efi_cout_set_attribute,
453 .clear_screen = efi_cout_clear_screen,
454 .set_cursor_position = efi_cout_set_cursor_position,
455 .enable_cursor = efi_cout_enable_cursor,
456 .mode = (void*)&efi_con_mode,
460 * struct efi_cin_notify_function - registered console input notify function
462 * @link: link to list
463 * @data: key to notify
464 * @function: function to call
466 struct efi_cin_notify_function {
467 struct list_head link;
468 struct efi_key_data key;
469 efi_status_t (EFIAPI *function)
470 (struct efi_key_data *key_data);
473 static bool key_available;
474 static struct efi_key_data next_key;
475 static LIST_HEAD(cin_notify_functions);
478 * set_shift_mask() - set shift mask
480 * @mod: Xterm shift mask
482 void set_shift_mask(int mod, struct efi_key_state *key_state)
484 key_state->key_shift_state = EFI_SHIFT_STATE_VALID;
488 key_state->key_shift_state |= EFI_LEFT_SHIFT_PRESSED;
490 key_state->key_shift_state |= EFI_LEFT_ALT_PRESSED;
492 key_state->key_shift_state |= EFI_LEFT_CONTROL_PRESSED;
493 if (!mod || (mod & 8))
494 key_state->key_shift_state |= EFI_LEFT_LOGO_PRESSED;
499 * analyze_modifiers() - analyze modifiers (shift, alt, ctrl) for function keys
501 * This gets called when we have already parsed CSI.
503 * @modifiers: bit mask (shift, alt, ctrl)
504 * @return: the unmodified code
506 static int analyze_modifiers(struct efi_key_state *key_state)
508 int c, mod = 0, ret = 0;
532 set_shift_mask(mod, key_state);
539 * efi_cin_read_key() - read a key from the console input
541 * @key: - key received
542 * Return: - status code
544 static efi_status_t efi_cin_read_key(struct efi_key_data *key)
546 struct efi_input_key pressed_key = {
552 if (console_read_unicode(&ch))
553 return EFI_NOT_READY;
555 key->key_state.key_shift_state = EFI_SHIFT_STATE_INVALID;
556 key->key_state.key_toggle_state = EFI_TOGGLE_STATE_INVALID;
558 /* We do not support multi-word codes */
565 * Xterm Control Sequences
566 * https://www.xfree86.org/4.8.0/ctlseqs.html
571 pressed_key.scan_code = 23;
573 case 'O': /* F1 - F4, End */
575 /* consider modifiers */
576 if (ch == 'F') { /* End */
577 pressed_key.scan_code = 6;
579 } else if (ch < 'P') {
580 set_shift_mask(ch - '0', &key->key_state);
583 pressed_key.scan_code = ch - 'P' + 11;
588 case 'A'...'D': /* up, down right, left */
589 pressed_key.scan_code = ch - 'A' + 1;
592 pressed_key.scan_code = 6;
595 pressed_key.scan_code = 5;
598 ch = analyze_modifiers(&key->key_state);
600 case '1'...'5': /* F1 - F5 */
601 pressed_key.scan_code = ch - '1' + 11;
603 case '6'...'9': /* F5 - F8 */
604 pressed_key.scan_code = ch - '6' + 15;
606 case 'A'...'D': /* up, down right, left */
607 pressed_key.scan_code = ch - 'A' + 1;
610 pressed_key.scan_code = 6;
613 pressed_key.scan_code = 5;
616 pressed_key.scan_code = 5;
621 ch = analyze_modifiers(&key->key_state);
623 case '0'...'1': /* F9 - F10 */
624 pressed_key.scan_code = ch - '0' + 19;
626 case '3'...'4': /* F11 - F12 */
627 pressed_key.scan_code = ch - '3' + 21;
630 pressed_key.scan_code = 7;
635 pressed_key.scan_code = 8;
636 analyze_modifiers(&key->key_state);
638 case '5': /* PG UP */
639 pressed_key.scan_code = 9;
640 analyze_modifiers(&key->key_state);
642 case '6': /* PG DOWN */
643 pressed_key.scan_code = 10;
644 analyze_modifiers(&key->key_state);
650 set_shift_mask(3, &key->key_state);
657 if (pressed_key.scan_code) {
658 key->key_state.key_shift_state |= EFI_SHIFT_STATE_VALID;
660 pressed_key.unicode_char = ch;
663 * Assume left control key for control characters typically
664 * entered using the control key.
666 if (ch >= 0x01 && ch <= 0x1f) {
667 key->key_state.key_shift_state |=
668 EFI_SHIFT_STATE_VALID;
673 key->key_state.key_shift_state |=
674 EFI_LEFT_CONTROL_PRESSED;
678 key->key = pressed_key;
684 * efi_cin_notify() - notify registered functions
686 static void efi_cin_notify(void)
688 struct efi_cin_notify_function *item;
690 list_for_each_entry(item, &cin_notify_functions, link) {
693 /* We do not support toggle states */
694 if (item->key.key.unicode_char || item->key.key.scan_code) {
695 if (item->key.key.unicode_char !=
696 next_key.key.unicode_char ||
697 item->key.key.scan_code != next_key.key.scan_code)
700 if (item->key.key_state.key_shift_state &&
701 item->key.key_state.key_shift_state !=
702 next_key.key_state.key_shift_state)
706 /* We don't bother about the return code */
707 EFI_CALL(item->function(&next_key));
712 * efi_cin_check() - check if keyboard input is available
714 static void efi_cin_check(void)
719 efi_signal_event(efi_con_in.wait_for_key);
724 ret = efi_cin_read_key(&next_key);
725 if (ret == EFI_SUCCESS) {
726 key_available = true;
728 /* Notify registered functions */
731 /* Queue the wait for key event */
733 efi_signal_event(efi_con_in.wait_for_key);
739 * efi_cin_empty_buffer() - empty input buffer
741 static void efi_cin_empty_buffer(void)
745 key_available = false;
749 * efi_cin_reset_ex() - reset console input
751 * @this: - the extended simple text input protocol
752 * @extended_verification: - extended verification
754 * This function implements the reset service of the
755 * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.
757 * See the Unified Extensible Firmware Interface (UEFI) specification for
760 * Return: old value of the task priority level
762 static efi_status_t EFIAPI efi_cin_reset_ex(
763 struct efi_simple_text_input_ex_protocol *this,
764 bool extended_verification)
766 efi_status_t ret = EFI_SUCCESS;
768 EFI_ENTRY("%p, %d", this, extended_verification);
770 /* Check parameters */
772 ret = EFI_INVALID_PARAMETER;
776 efi_cin_empty_buffer();
778 return EFI_EXIT(ret);
782 * efi_cin_read_key_stroke_ex() - read key stroke
784 * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
785 * @key_data: key read from console
786 * Return: status code
788 * This function implements the ReadKeyStrokeEx service of the
789 * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.
791 * See the Unified Extensible Firmware Interface (UEFI) specification for
794 static efi_status_t EFIAPI efi_cin_read_key_stroke_ex(
795 struct efi_simple_text_input_ex_protocol *this,
796 struct efi_key_data *key_data)
798 efi_status_t ret = EFI_SUCCESS;
800 EFI_ENTRY("%p, %p", this, key_data);
802 /* Check parameters */
803 if (!this || !key_data) {
804 ret = EFI_INVALID_PARAMETER;
808 /* We don't do interrupts, so check for timers cooperatively */
811 /* Enable console input after ExitBootServices */
814 if (!key_available) {
819 * CTRL+A - CTRL+Z have to be signaled as a - z.
820 * SHIFT+CTRL+A - SHIFT+CTRL+Z have to be signaled as A - Z.
822 switch (next_key.key.unicode_char) {
826 if (!(next_key.key_state.key_toggle_state &
827 EFI_CAPS_LOCK_ACTIVE) ^
828 !(next_key.key_state.key_shift_state &
829 (EFI_LEFT_SHIFT_PRESSED | EFI_RIGHT_SHIFT_PRESSED)))
830 next_key.key.unicode_char += 0x40;
832 next_key.key.unicode_char += 0x60;
834 *key_data = next_key;
835 key_available = false;
836 efi_con_in.wait_for_key->is_signaled = false;
839 return EFI_EXIT(ret);
843 * efi_cin_set_state() - set toggle key state
845 * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
846 * @key_toggle_state: pointer to key toggle state
847 * Return: status code
849 * This function implements the SetState service of the
850 * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.
852 * See the Unified Extensible Firmware Interface (UEFI) specification for
855 static efi_status_t EFIAPI efi_cin_set_state(
856 struct efi_simple_text_input_ex_protocol *this,
857 u8 *key_toggle_state)
859 EFI_ENTRY("%p, %p", this, key_toggle_state);
861 * U-Boot supports multiple console input sources like serial and
862 * net console for which a key toggle state cannot be set at all.
864 * According to the UEFI specification it is allowable to not implement
867 return EFI_EXIT(EFI_UNSUPPORTED);
871 * efi_cin_register_key_notify() - register key notification function
873 * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
874 * @key_data: key to be notified
875 * @key_notify_function: function to be called if the key is pressed
876 * @notify_handle: handle for unregistering the notification
877 * Return: status code
879 * This function implements the SetState service of the
880 * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.
882 * See the Unified Extensible Firmware Interface (UEFI) specification for
885 static efi_status_t EFIAPI efi_cin_register_key_notify(
886 struct efi_simple_text_input_ex_protocol *this,
887 struct efi_key_data *key_data,
888 efi_status_t (EFIAPI *key_notify_function)(
889 struct efi_key_data *key_data),
890 void **notify_handle)
892 efi_status_t ret = EFI_SUCCESS;
893 struct efi_cin_notify_function *notify_function;
895 EFI_ENTRY("%p, %p, %p, %p",
896 this, key_data, key_notify_function, notify_handle);
898 /* Check parameters */
899 if (!this || !key_data || !key_notify_function || !notify_handle) {
900 ret = EFI_INVALID_PARAMETER;
904 EFI_PRINT("u+%04x, sc %04x, sh %08x, tg %02x\n",
905 key_data->key.unicode_char,
906 key_data->key.scan_code,
907 key_data->key_state.key_shift_state,
908 key_data->key_state.key_toggle_state);
910 notify_function = calloc(1, sizeof(struct efi_cin_notify_function));
911 if (!notify_function) {
912 ret = EFI_OUT_OF_RESOURCES;
915 notify_function->key = *key_data;
916 notify_function->function = key_notify_function;
917 list_add_tail(¬ify_function->link, &cin_notify_functions);
918 *notify_handle = notify_function;
920 return EFI_EXIT(ret);
924 * efi_cin_unregister_key_notify() - unregister key notification function
926 * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
927 * @notification_handle: handle received when registering
928 * Return: status code
930 * This function implements the SetState service of the
931 * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.
933 * See the Unified Extensible Firmware Interface (UEFI) specification for
936 static efi_status_t EFIAPI efi_cin_unregister_key_notify(
937 struct efi_simple_text_input_ex_protocol *this,
938 void *notification_handle)
940 efi_status_t ret = EFI_INVALID_PARAMETER;
941 struct efi_cin_notify_function *item, *notify_function =
944 EFI_ENTRY("%p, %p", this, notification_handle);
946 /* Check parameters */
947 if (!this || !notification_handle)
950 list_for_each_entry(item, &cin_notify_functions, link) {
951 if (item == notify_function) {
956 if (ret != EFI_SUCCESS)
959 /* Remove the notify function */
960 list_del(¬ify_function->link);
961 free(notify_function);
963 return EFI_EXIT(ret);
968 * efi_cin_reset() - drain the input buffer
970 * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
971 * @extended_verification: allow for exhaustive verification
972 * Return: status code
974 * This function implements the Reset service of the
975 * EFI_SIMPLE_TEXT_INPUT_PROTOCOL.
977 * See the Unified Extensible Firmware Interface (UEFI) specification for
980 static efi_status_t EFIAPI efi_cin_reset
981 (struct efi_simple_text_input_protocol *this,
982 bool extended_verification)
984 efi_status_t ret = EFI_SUCCESS;
986 EFI_ENTRY("%p, %d", this, extended_verification);
988 /* Check parameters */
990 ret = EFI_INVALID_PARAMETER;
994 efi_cin_empty_buffer();
996 return EFI_EXIT(ret);
1000 * efi_cin_read_key_stroke() - read key stroke
1002 * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
1003 * @key: key read from console
1004 * Return: status code
1006 * This function implements the ReadKeyStroke service of the
1007 * EFI_SIMPLE_TEXT_INPUT_PROTOCOL.
1009 * See the Unified Extensible Firmware Interface (UEFI) specification for
1012 static efi_status_t EFIAPI efi_cin_read_key_stroke
1013 (struct efi_simple_text_input_protocol *this,
1014 struct efi_input_key *key)
1016 efi_status_t ret = EFI_SUCCESS;
1018 EFI_ENTRY("%p, %p", this, key);
1020 /* Check parameters */
1021 if (!this || !key) {
1022 ret = EFI_INVALID_PARAMETER;
1026 /* We don't do interrupts, so check for timers cooperatively */
1029 /* Enable console input after ExitBootServices */
1032 if (!key_available) {
1033 ret = EFI_NOT_READY;
1036 *key = next_key.key;
1037 key_available = false;
1038 efi_con_in.wait_for_key->is_signaled = false;
1040 return EFI_EXIT(ret);
1043 static struct efi_simple_text_input_ex_protocol efi_con_in_ex = {
1044 .reset = efi_cin_reset_ex,
1045 .read_key_stroke_ex = efi_cin_read_key_stroke_ex,
1046 .wait_for_key_ex = NULL,
1047 .set_state = efi_cin_set_state,
1048 .register_key_notify = efi_cin_register_key_notify,
1049 .unregister_key_notify = efi_cin_unregister_key_notify,
1052 struct efi_simple_text_input_protocol efi_con_in = {
1053 .reset = efi_cin_reset,
1054 .read_key_stroke = efi_cin_read_key_stroke,
1055 .wait_for_key = NULL,
1058 static struct efi_event *console_timer_event;
1061 * efi_console_timer_notify() - notify the console timer event
1063 * @event: console timer event
1064 * @context: not used
1066 static void EFIAPI efi_console_timer_notify(struct efi_event *event,
1069 EFI_ENTRY("%p, %p", event, context);
1071 EFI_EXIT(EFI_SUCCESS);
1075 * efi_key_notify() - notify the wait for key event
1077 * @event: wait for key event
1078 * @context: not used
1080 static void EFIAPI efi_key_notify(struct efi_event *event, void *context)
1082 EFI_ENTRY("%p, %p", event, context);
1084 EFI_EXIT(EFI_SUCCESS);
1088 * efi_console_register() - install the console protocols
1090 * This function is called from do_bootefi_exec().
1092 * Return: status code
1094 efi_status_t efi_console_register(void)
1097 efi_handle_t console_output_handle;
1098 efi_handle_t console_input_handle;
1100 /* Set up mode information */
1101 query_console_size();
1103 /* Create handles */
1104 r = efi_create_handle(&console_output_handle);
1105 if (r != EFI_SUCCESS)
1108 r = efi_add_protocol(console_output_handle,
1109 &efi_guid_text_output_protocol, &efi_con_out);
1110 if (r != EFI_SUCCESS)
1112 systab.con_out_handle = console_output_handle;
1113 systab.stderr_handle = console_output_handle;
1115 r = efi_create_handle(&console_input_handle);
1116 if (r != EFI_SUCCESS)
1119 r = efi_add_protocol(console_input_handle,
1120 &efi_guid_text_input_protocol, &efi_con_in);
1121 if (r != EFI_SUCCESS)
1123 systab.con_in_handle = console_input_handle;
1124 r = efi_add_protocol(console_input_handle,
1125 &efi_guid_text_input_ex_protocol, &efi_con_in_ex);
1126 if (r != EFI_SUCCESS)
1129 /* Create console events */
1130 r = efi_create_event(EVT_NOTIFY_WAIT, TPL_CALLBACK, efi_key_notify,
1131 NULL, NULL, &efi_con_in.wait_for_key);
1132 if (r != EFI_SUCCESS) {
1133 printf("ERROR: Failed to register WaitForKey event\n");
1136 efi_con_in_ex.wait_for_key_ex = efi_con_in.wait_for_key;
1137 r = efi_create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL, TPL_CALLBACK,
1138 efi_console_timer_notify, NULL, NULL,
1139 &console_timer_event);
1140 if (r != EFI_SUCCESS) {
1141 printf("ERROR: Failed to register console event\n");
1144 /* 5000 ns cycle is sufficient for 2 MBaud */
1145 r = efi_set_timer(console_timer_event, EFI_TIMER_PERIODIC, 50);
1146 if (r != EFI_SUCCESS)
1147 printf("ERROR: Failed to set console timer\n");
1150 printf("ERROR: Out of memory\n");