// SPDX-License-Identifier: GPL-2.0+ /* * EFI application console interface * * Copyright (c) 2016 Alexander Graf */ #define LOG_CATEGORY LOGC_EFI #include #include #include #include #include #include #include #include #include #include #include #define EFI_COUT_MODE_2 2 #define EFI_MAX_COUT_MODE 3 struct cout_mode { unsigned long columns; unsigned long rows; int present; }; __maybe_unused static struct efi_object uart_obj; static struct cout_mode efi_cout_modes[] = { /* EFI Mode 0 is 80x25 and always present */ { .columns = 80, .rows = 25, .present = 1, }, /* EFI Mode 1 is always 80x50 */ { .columns = 80, .rows = 50, .present = 0, }, /* Value are unknown until we query the console */ { .columns = 0, .rows = 0, .present = 0, }, }; const efi_guid_t efi_guid_text_input_ex_protocol = EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID; const efi_guid_t efi_guid_text_input_protocol = EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID; const efi_guid_t efi_guid_text_output_protocol = EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID; #define cESC '\x1b' #define ESC "\x1b" /* * efi_con_mode - mode information of the Simple Text Output Protocol * * Use safe settings before efi_setup_console_size() is called. * By default enable only the 80x25 mode which must always exist. */ static struct simple_text_output_mode efi_con_mode = { .max_mode = 1, .mode = 0, .attribute = 0, .cursor_column = 0, .cursor_row = 0, .cursor_visible = 1, }; static int term_get_char(s32 *c) { u64 timeout; /* Wait up to 100 ms for a character */ timeout = timer_get_us() + 100000; while (!tstc()) if (timer_get_us() > timeout) return 1; *c = getchar(); return 0; } /** * Receive and parse a reply from the terminal. * * @n: array of return values * @num: number of return values expected * @end_char: character indicating end of terminal message * Return: non-zero indicates error */ static int term_read_reply(int *n, int num, char end_char) { s32 c; int i = 0; if (term_get_char(&c) || c != cESC) return -1; if (term_get_char(&c) || c != '[') return -1; n[0] = 0; while (1) { if (!term_get_char(&c)) { if (c == ';') { i++; if (i >= num) return -1; n[i] = 0; continue; } else if (c == end_char) { break; } else if (c > '9' || c < '0') { return -1; } /* Read one more decimal position */ n[i] *= 10; n[i] += c - '0'; } else { return -1; } } if (i != num - 1) return -1; return 0; } /** * efi_cout_output_string() - write Unicode string to console * * This function implements the OutputString service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @this: simple text output protocol * @string: u16 string * Return: status code */ static efi_status_t EFIAPI efi_cout_output_string( struct efi_simple_text_output_protocol *this, const u16 *string) { struct simple_text_output_mode *con = &efi_con_mode; struct cout_mode *mode = &efi_cout_modes[con->mode]; char *buf, *pos; const u16 *p; efi_status_t ret = EFI_SUCCESS; EFI_ENTRY("%p, %p", this, string); if (!this || !string) { ret = EFI_INVALID_PARAMETER; goto out; } buf = malloc(utf16_utf8_strlen(string) + 1); if (!buf) { ret = EFI_OUT_OF_RESOURCES; goto out; } pos = buf; utf16_utf8_strcpy(&pos, string); fputs(stdout, buf); free(buf); /* * Update the cursor position. * * The UEFI spec provides advance rules for U+0000, U+0008, U+000A, * and U000D. All other control characters are ignored. Any non-control * character increase the column by one. */ for (p = string; *p; ++p) { switch (*p) { case '\b': /* U+0008, backspace */ if (con->cursor_column) con->cursor_column--; break; case '\n': /* U+000A, newline */ con->cursor_column = 0; con->cursor_row++; break; case '\r': /* U+000D, carriage-return */ con->cursor_column = 0; break; case 0xd800 ... 0xdbff: /* * Ignore high surrogates, we do not want to count a * Unicode character twice. */ break; default: /* Exclude control codes */ if (*p > 0x1f) con->cursor_column++; break; } if (con->cursor_column >= mode->columns) { con->cursor_column = 0; con->cursor_row++; } /* * When we exceed the row count the terminal will scroll up one * line. We have to adjust the cursor position. */ if (con->cursor_row >= mode->rows && con->cursor_row) con->cursor_row--; } out: return EFI_EXIT(ret); } /** * efi_cout_test_string() - test writing Unicode string to console * * This function implements the TestString service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * As in OutputString we simply convert UTF-16 to UTF-8 there are no unsupported * code points and we can always return EFI_SUCCESS. * * @this: simple text output protocol * @string: u16 string * Return: status code */ static efi_status_t EFIAPI efi_cout_test_string( struct efi_simple_text_output_protocol *this, const u16 *string) { EFI_ENTRY("%p, %p", this, string); return EFI_EXIT(EFI_SUCCESS); } /** * cout_mode_matches() - check if mode has given terminal size * * @mode: text mode * @rows: number of rows * @cols: number of columns * Return: true if number of rows and columns matches the mode and * the mode is present */ static bool cout_mode_matches(struct cout_mode *mode, int rows, int cols) { if (!mode->present) return false; return (mode->rows == rows) && (mode->columns == cols); } /** * query_console_serial() - query serial console size * * When using a serial console or the net console we can only devise the * terminal size by querying the terminal using ECMA-48 control sequences. * * @rows: pointer to return number of rows * @cols: pointer to return number of columns * Returns: 0 on success */ static int query_console_serial(int *rows, int *cols) { int ret = 0; int n[2]; /* Empty input buffer */ while (tstc()) getchar(); /* * Not all terminals understand CSI [18t for querying the console size. * We should adhere to escape sequences documented in the console_codes * man page and the ECMA-48 standard. * * So here we follow a different approach. We position the cursor to the * bottom right and query its position. Before leaving the function we * restore the original cursor position. */ printf(ESC "7" /* Save cursor position */ ESC "[r" /* Set scrolling region to full window */ ESC "[999;999H" /* Move to bottom right corner */ ESC "[6n"); /* Query cursor position */ /* Read {rows,cols} */ if (term_read_reply(n, 2, 'R')) { ret = 1; goto out; } *cols = n[1]; *rows = n[0]; out: printf(ESC "8"); /* Restore cursor position */ return ret; } /** * query_vidconsole() - query video console size * * * @rows: pointer to return number of rows * @cols: pointer to return number of columns * Returns: 0 on success */ static int __maybe_unused query_vidconsole(int *rows, int *cols) { const char *stdout_name = env_get("stdout"); struct stdio_dev *stdout_dev; struct udevice *dev; struct vidconsole_priv *priv; if (!stdout_name || strncmp(stdout_name, "vidconsole", 10)) return -ENODEV; stdout_dev = stdio_get_by_name("vidconsole"); if (!stdout_dev) return -ENODEV; dev = stdout_dev->priv; if (!dev) return -ENODEV; priv = dev_get_uclass_priv(dev); if (!priv) return -ENODEV; *rows = priv->rows; *cols = priv->cols; return 0; } /** * efi_setup_console_size() - update the mode table. * * By default the only mode available is 80x25. If the console has at least 50 * lines, enable mode 80x50. If we can query the console size and it is neither * 80x25 nor 80x50, set it as an additional mode. */ void efi_setup_console_size(void) { int rows = 25, cols = 80; int ret = -ENODEV; if (IS_ENABLED(CONFIG_DM_VIDEO)) ret = query_vidconsole(&rows, &cols); if (ret) ret = query_console_serial(&rows, &cols); if (ret) return; log_debug("Console size %dx%d\n", rows, cols); /* Test if we can have Mode 1 */ if (cols >= 80 && rows >= 50) { efi_cout_modes[1].present = 1; efi_con_mode.max_mode = 2; } /* * Install our mode as mode 2 if it is different * than mode 0 or 1 and set it as the currently selected mode */ if (!cout_mode_matches(&efi_cout_modes[0], rows, cols) && !cout_mode_matches(&efi_cout_modes[1], rows, cols)) { efi_cout_modes[EFI_COUT_MODE_2].columns = cols; efi_cout_modes[EFI_COUT_MODE_2].rows = rows; efi_cout_modes[EFI_COUT_MODE_2].present = 1; efi_con_mode.max_mode = EFI_MAX_COUT_MODE; efi_con_mode.mode = EFI_COUT_MODE_2; } } /** * efi_cout_query_mode() - get terminal size for a text mode * * This function implements the QueryMode service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @this: simple text output protocol * @mode_number: mode number to retrieve information on * @columns: number of columns * @rows: number of rows * Return: status code */ static efi_status_t EFIAPI efi_cout_query_mode( struct efi_simple_text_output_protocol *this, unsigned long mode_number, unsigned long *columns, unsigned long *rows) { EFI_ENTRY("%p, %ld, %p, %p", this, mode_number, columns, rows); if (mode_number >= efi_con_mode.max_mode) return EFI_EXIT(EFI_UNSUPPORTED); if (efi_cout_modes[mode_number].present != 1) return EFI_EXIT(EFI_UNSUPPORTED); if (columns) *columns = efi_cout_modes[mode_number].columns; if (rows) *rows = efi_cout_modes[mode_number].rows; return EFI_EXIT(EFI_SUCCESS); } static const struct { unsigned int fg; unsigned int bg; } color[] = { { 30, 40 }, /* 0: black */ { 34, 44 }, /* 1: blue */ { 32, 42 }, /* 2: green */ { 36, 46 }, /* 3: cyan */ { 31, 41 }, /* 4: red */ { 35, 45 }, /* 5: magenta */ { 33, 43 }, /* 6: brown, map to yellow as EDK2 does*/ { 37, 47 }, /* 7: light gray, map to white */ }; /** * efi_cout_set_attribute() - set fore- and background color * * This function implements the SetAttribute service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @this: simple text output protocol * @attribute: foreground color - bits 0-3, background color - bits 4-6 * Return: status code */ static efi_status_t EFIAPI efi_cout_set_attribute( struct efi_simple_text_output_protocol *this, unsigned long attribute) { unsigned int bold = EFI_ATTR_BOLD(attribute); unsigned int fg = EFI_ATTR_FG(attribute); unsigned int bg = EFI_ATTR_BG(attribute); EFI_ENTRY("%p, %lx", this, attribute); efi_con_mode.attribute = attribute; if (attribute) printf(ESC"[%u;%u;%um", bold, color[fg].fg, color[bg].bg); else printf(ESC"[0;37;40m"); return EFI_EXIT(EFI_SUCCESS); } /** * efi_cout_clear_screen() - clear screen * * This function implements the ClearScreen service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @this: pointer to the protocol instance * Return: status code */ static efi_status_t EFIAPI efi_cout_clear_screen( struct efi_simple_text_output_protocol *this) { EFI_ENTRY("%p", this); /* * The Linux console wants both a clear and a home command. The video * uclass does not support [H without coordinates, yet. */ printf(ESC "[2J" ESC "[1;1H"); efi_con_mode.cursor_column = 0; efi_con_mode.cursor_row = 0; return EFI_EXIT(EFI_SUCCESS); } /** * efi_cout_clear_set_mode() - set text model * * This function implements the SetMode service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @this: pointer to the protocol instance * @mode_number: number of the text mode to set * Return: status code */ static efi_status_t EFIAPI efi_cout_set_mode( struct efi_simple_text_output_protocol *this, unsigned long mode_number) { EFI_ENTRY("%p, %ld", this, mode_number); if (mode_number >= efi_con_mode.max_mode) return EFI_EXIT(EFI_UNSUPPORTED); if (!efi_cout_modes[mode_number].present) return EFI_EXIT(EFI_UNSUPPORTED); efi_con_mode.mode = mode_number; EFI_CALL(efi_cout_clear_screen(this)); return EFI_EXIT(EFI_SUCCESS); } /** * efi_cout_reset() - reset the terminal * * This function implements the Reset service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @this: pointer to the protocol instance * @extended_verification: if set an extended verification may be executed * Return: status code */ static efi_status_t EFIAPI efi_cout_reset( struct efi_simple_text_output_protocol *this, char extended_verification) { EFI_ENTRY("%p, %d", this, extended_verification); /* Set default colors */ efi_con_mode.attribute = 0x07; printf(ESC "[0;37;40m"); /* Clear screen */ EFI_CALL(efi_cout_clear_screen(this)); return EFI_EXIT(EFI_SUCCESS); } /** * efi_cout_set_cursor_position() - reset the terminal * * This function implements the SetCursorPosition service of the simple text * output protocol. See the Unified Extensible Firmware Interface (UEFI) * specification for details. * * @this: pointer to the protocol instance * @column: column to move to * @row: row to move to * Return: status code */ static efi_status_t EFIAPI efi_cout_set_cursor_position( struct efi_simple_text_output_protocol *this, unsigned long column, unsigned long row) { efi_status_t ret = EFI_SUCCESS; struct simple_text_output_mode *con = &efi_con_mode; struct cout_mode *mode = &efi_cout_modes[con->mode]; EFI_ENTRY("%p, %ld, %ld", this, column, row); /* Check parameters */ if (!this) { ret = EFI_INVALID_PARAMETER; goto out; } if (row >= mode->rows || column >= mode->columns) { ret = EFI_UNSUPPORTED; goto out; } /* * Set cursor position by sending CSI H. * EFI origin is [0, 0], terminal origin is [1, 1]. */ printf(ESC "[%d;%dH", (int)row + 1, (int)column + 1); efi_con_mode.cursor_column = column; efi_con_mode.cursor_row = row; out: return EFI_EXIT(ret); } /** * efi_cout_enable_cursor() - enable the cursor * * This function implements the EnableCursor service of the simple text output * protocol. See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @this: pointer to the protocol instance * @enable: if true enable, if false disable the cursor * Return: status code */ static efi_status_t EFIAPI efi_cout_enable_cursor( struct efi_simple_text_output_protocol *this, bool enable) { EFI_ENTRY("%p, %d", this, enable); printf(ESC"[?25%c", enable ? 'h' : 'l'); efi_con_mode.cursor_visible = !!enable; return EFI_EXIT(EFI_SUCCESS); } struct efi_simple_text_output_protocol efi_con_out = { .reset = efi_cout_reset, .output_string = efi_cout_output_string, .test_string = efi_cout_test_string, .query_mode = efi_cout_query_mode, .set_mode = efi_cout_set_mode, .set_attribute = efi_cout_set_attribute, .clear_screen = efi_cout_clear_screen, .set_cursor_position = efi_cout_set_cursor_position, .enable_cursor = efi_cout_enable_cursor, .mode = (void*)&efi_con_mode, }; /** * struct efi_cin_notify_function - registered console input notify function * * @link: link to list * @key: key to notify * @function: function to call */ struct efi_cin_notify_function { struct list_head link; struct efi_key_data key; efi_status_t (EFIAPI *function) (struct efi_key_data *key_data); }; static bool key_available; static struct efi_key_data next_key; static LIST_HEAD(cin_notify_functions); /** * set_shift_mask() - set shift mask * * @mod: Xterm shift mask * @key_state: receives the state of the shift, alt, control, and logo keys */ void set_shift_mask(int mod, struct efi_key_state *key_state) { key_state->key_shift_state = EFI_SHIFT_STATE_VALID; if (mod) { --mod; if (mod & 1) key_state->key_shift_state |= EFI_LEFT_SHIFT_PRESSED; if (mod & 2) key_state->key_shift_state |= EFI_LEFT_ALT_PRESSED; if (mod & 4) key_state->key_shift_state |= EFI_LEFT_CONTROL_PRESSED; if (!mod || (mod & 8)) key_state->key_shift_state |= EFI_LEFT_LOGO_PRESSED; } } /** * analyze_modifiers() - analyze modifiers (shift, alt, ctrl) for function keys * * This gets called when we have already parsed CSI. * * @key_state: receives the state of the shift, alt, control, and logo keys * Return: the unmodified code */ static int analyze_modifiers(struct efi_key_state *key_state) { int c, mod = 0, ret = 0; c = getchar(); if (c != ';') { ret = c; if (c == '~') goto out; c = getchar(); } for (;;) { switch (c) { case '0'...'9': mod *= 10; mod += c - '0'; /* fall through */ case ';': c = getchar(); break; default: goto out; } } out: set_shift_mask(mod, key_state); if (!ret) ret = c; return ret; } /** * efi_cin_read_key() - read a key from the console input * * @key: - key received * Return: - status code */ static efi_status_t efi_cin_read_key(struct efi_key_data *key) { struct efi_input_key pressed_key = { .scan_code = 0, .unicode_char = 0, }; s32 ch; if (console_read_unicode(&ch)) return EFI_NOT_READY; key->key_state.key_shift_state = EFI_SHIFT_STATE_INVALID; key->key_state.key_toggle_state = EFI_TOGGLE_STATE_INVALID; /* We do not support multi-word codes */ if (ch >= 0x10000) ch = '?'; switch (ch) { case 0x1b: /* * If a second key is received within 10 ms, assume that we are * dealing with an escape sequence. Otherwise consider this the * escape key being hit. 10 ms is long enough to work fine at * 1200 baud and above. */ udelay(10000); if (!tstc()) { pressed_key.scan_code = 23; break; } /* * Xterm Control Sequences * https://www.xfree86.org/4.8.0/ctlseqs.html */ ch = getchar(); switch (ch) { case cESC: /* ESC */ pressed_key.scan_code = 23; break; case 'O': /* F1 - F4, End */ ch = getchar(); /* consider modifiers */ if (ch == 'F') { /* End */ pressed_key.scan_code = 6; break; } else if (ch < 'P') { set_shift_mask(ch - '0', &key->key_state); ch = getchar(); } pressed_key.scan_code = ch - 'P' + 11; break; case '[': ch = getchar(); switch (ch) { case 'A'...'D': /* up, down right, left */ pressed_key.scan_code = ch - 'A' + 1; break; case 'F': /* End */ pressed_key.scan_code = 6; break; case 'H': /* Home */ pressed_key.scan_code = 5; break; case '1': ch = analyze_modifiers(&key->key_state); switch (ch) { case '1'...'5': /* F1 - F5 */ pressed_key.scan_code = ch - '1' + 11; break; case '6'...'9': /* F5 - F8 */ pressed_key.scan_code = ch - '6' + 15; break; case 'A'...'D': /* up, down right, left */ pressed_key.scan_code = ch - 'A' + 1; break; case 'F': /* End */ pressed_key.scan_code = 6; break; case 'H': /* Home */ pressed_key.scan_code = 5; break; case '~': /* Home */ pressed_key.scan_code = 5; break; } break; case '2': ch = analyze_modifiers(&key->key_state); switch (ch) { case '0'...'1': /* F9 - F10 */ pressed_key.scan_code = ch - '0' + 19; break; case '3'...'4': /* F11 - F12 */ pressed_key.scan_code = ch - '3' + 21; break; case '~': /* INS */ pressed_key.scan_code = 7; break; } break; case '3': /* DEL */ pressed_key.scan_code = 8; analyze_modifiers(&key->key_state); break; case '5': /* PG UP */ pressed_key.scan_code = 9; analyze_modifiers(&key->key_state); break; case '6': /* PG DOWN */ pressed_key.scan_code = 10; analyze_modifiers(&key->key_state); break; } /* [ */ break; default: /* ALT key */ set_shift_mask(3, &key->key_state); } break; case 0x7f: /* Backspace */ ch = 0x08; } if (pressed_key.scan_code) { key->key_state.key_shift_state |= EFI_SHIFT_STATE_VALID; } else { pressed_key.unicode_char = ch; /* * Assume left control key for control characters typically * entered using the control key. */ if (ch >= 0x01 && ch <= 0x1f) { key->key_state.key_shift_state |= EFI_SHIFT_STATE_VALID; switch (ch) { case 0x01 ... 0x07: case 0x0b ... 0x0c: case 0x0e ... 0x1f: key->key_state.key_shift_state |= EFI_LEFT_CONTROL_PRESSED; } } } key->key = pressed_key; return EFI_SUCCESS; } /** * efi_cin_notify() - notify registered functions */ static void efi_cin_notify(void) { struct efi_cin_notify_function *item; list_for_each_entry(item, &cin_notify_functions, link) { bool match = true; /* We do not support toggle states */ if (item->key.key.unicode_char || item->key.key.scan_code) { if (item->key.key.unicode_char != next_key.key.unicode_char || item->key.key.scan_code != next_key.key.scan_code) match = false; } if (item->key.key_state.key_shift_state && item->key.key_state.key_shift_state != next_key.key_state.key_shift_state) match = false; if (match) /* We don't bother about the return code */ EFI_CALL(item->function(&next_key)); } } /** * efi_cin_check() - check if keyboard input is available */ static void efi_cin_check(void) { efi_status_t ret; if (key_available) { efi_signal_event(efi_con_in.wait_for_key); return; } if (tstc()) { ret = efi_cin_read_key(&next_key); if (ret == EFI_SUCCESS) { key_available = true; /* Notify registered functions */ efi_cin_notify(); /* Queue the wait for key event */ if (key_available) efi_signal_event(efi_con_in.wait_for_key); } } } /** * efi_cin_empty_buffer() - empty input buffer */ static void efi_cin_empty_buffer(void) { while (tstc()) getchar(); key_available = false; } /** * efi_cin_reset_ex() - reset console input * * @this: - the extended simple text input protocol * @extended_verification: - extended verification * * This function implements the reset service of the * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. * * Return: old value of the task priority level */ static efi_status_t EFIAPI efi_cin_reset_ex( struct efi_simple_text_input_ex_protocol *this, bool extended_verification) { efi_status_t ret = EFI_SUCCESS; EFI_ENTRY("%p, %d", this, extended_verification); /* Check parameters */ if (!this) { ret = EFI_INVALID_PARAMETER; goto out; } efi_cin_empty_buffer(); out: return EFI_EXIT(ret); } /** * efi_cin_read_key_stroke_ex() - read key stroke * * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL * @key_data: key read from console * Return: status code * * This function implements the ReadKeyStrokeEx service of the * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. */ static efi_status_t EFIAPI efi_cin_read_key_stroke_ex( struct efi_simple_text_input_ex_protocol *this, struct efi_key_data *key_data) { efi_status_t ret = EFI_SUCCESS; EFI_ENTRY("%p, %p", this, key_data); /* Check parameters */ if (!this || !key_data) { ret = EFI_INVALID_PARAMETER; goto out; } /* We don't do interrupts, so check for timers cooperatively */ efi_timer_check(); /* Enable console input after ExitBootServices */ efi_cin_check(); if (!key_available) { ret = EFI_NOT_READY; goto out; } /* * CTRL+A - CTRL+Z have to be signaled as a - z. * SHIFT+CTRL+A - SHIFT+CTRL+Z have to be signaled as A - Z. */ switch (next_key.key.unicode_char) { case 0x01 ... 0x07: case 0x0b ... 0x0c: case 0x0e ... 0x1a: if (!(next_key.key_state.key_toggle_state & EFI_CAPS_LOCK_ACTIVE) ^ !(next_key.key_state.key_shift_state & (EFI_LEFT_SHIFT_PRESSED | EFI_RIGHT_SHIFT_PRESSED))) next_key.key.unicode_char += 0x40; else next_key.key.unicode_char += 0x60; } *key_data = next_key; key_available = false; efi_con_in.wait_for_key->is_signaled = false; out: return EFI_EXIT(ret); } /** * efi_cin_set_state() - set toggle key state * * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL * @key_toggle_state: pointer to key toggle state * Return: status code * * This function implements the SetState service of the * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. */ static efi_status_t EFIAPI efi_cin_set_state( struct efi_simple_text_input_ex_protocol *this, u8 *key_toggle_state) { EFI_ENTRY("%p, %p", this, key_toggle_state); /* * U-Boot supports multiple console input sources like serial and * net console for which a key toggle state cannot be set at all. * * According to the UEFI specification it is allowable to not implement * this service. */ return EFI_EXIT(EFI_UNSUPPORTED); } /** * efi_cin_register_key_notify() - register key notification function * * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL * @key_data: key to be notified * @key_notify_function: function to be called if the key is pressed * @notify_handle: handle for unregistering the notification * Return: status code * * This function implements the SetState service of the * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. */ static efi_status_t EFIAPI efi_cin_register_key_notify( struct efi_simple_text_input_ex_protocol *this, struct efi_key_data *key_data, efi_status_t (EFIAPI *key_notify_function)( struct efi_key_data *key_data), void **notify_handle) { efi_status_t ret = EFI_SUCCESS; struct efi_cin_notify_function *notify_function; EFI_ENTRY("%p, %p, %p, %p", this, key_data, key_notify_function, notify_handle); /* Check parameters */ if (!this || !key_data || !key_notify_function || !notify_handle) { ret = EFI_INVALID_PARAMETER; goto out; } EFI_PRINT("u+%04x, sc %04x, sh %08x, tg %02x\n", key_data->key.unicode_char, key_data->key.scan_code, key_data->key_state.key_shift_state, key_data->key_state.key_toggle_state); notify_function = calloc(1, sizeof(struct efi_cin_notify_function)); if (!notify_function) { ret = EFI_OUT_OF_RESOURCES; goto out; } notify_function->key = *key_data; notify_function->function = key_notify_function; list_add_tail(¬ify_function->link, &cin_notify_functions); *notify_handle = notify_function; out: return EFI_EXIT(ret); } /** * efi_cin_unregister_key_notify() - unregister key notification function * * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL * @notification_handle: handle received when registering * Return: status code * * This function implements the SetState service of the * EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. */ static efi_status_t EFIAPI efi_cin_unregister_key_notify( struct efi_simple_text_input_ex_protocol *this, void *notification_handle) { efi_status_t ret = EFI_INVALID_PARAMETER; struct efi_cin_notify_function *item, *notify_function = notification_handle; EFI_ENTRY("%p, %p", this, notification_handle); /* Check parameters */ if (!this || !notification_handle) goto out; list_for_each_entry(item, &cin_notify_functions, link) { if (item == notify_function) { ret = EFI_SUCCESS; break; } } if (ret != EFI_SUCCESS) goto out; /* Remove the notify function */ list_del(¬ify_function->link); free(notify_function); out: return EFI_EXIT(ret); } /** * efi_cin_reset() - drain the input buffer * * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL * @extended_verification: allow for exhaustive verification * Return: status code * * This function implements the Reset service of the * EFI_SIMPLE_TEXT_INPUT_PROTOCOL. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. */ static efi_status_t EFIAPI efi_cin_reset (struct efi_simple_text_input_protocol *this, bool extended_verification) { efi_status_t ret = EFI_SUCCESS; EFI_ENTRY("%p, %d", this, extended_verification); /* Check parameters */ if (!this) { ret = EFI_INVALID_PARAMETER; goto out; } efi_cin_empty_buffer(); out: return EFI_EXIT(ret); } /** * efi_cin_read_key_stroke() - read key stroke * * @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL * @key: key read from console * Return: status code * * This function implements the ReadKeyStroke service of the * EFI_SIMPLE_TEXT_INPUT_PROTOCOL. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. */ static efi_status_t EFIAPI efi_cin_read_key_stroke (struct efi_simple_text_input_protocol *this, struct efi_input_key *key) { efi_status_t ret = EFI_SUCCESS; EFI_ENTRY("%p, %p", this, key); /* Check parameters */ if (!this || !key) { ret = EFI_INVALID_PARAMETER; goto out; } /* We don't do interrupts, so check for timers cooperatively */ efi_timer_check(); /* Enable console input after ExitBootServices */ efi_cin_check(); if (!key_available) { ret = EFI_NOT_READY; goto out; } *key = next_key.key; key_available = false; efi_con_in.wait_for_key->is_signaled = false; out: return EFI_EXIT(ret); } static struct efi_simple_text_input_ex_protocol efi_con_in_ex = { .reset = efi_cin_reset_ex, .read_key_stroke_ex = efi_cin_read_key_stroke_ex, .wait_for_key_ex = NULL, .set_state = efi_cin_set_state, .register_key_notify = efi_cin_register_key_notify, .unregister_key_notify = efi_cin_unregister_key_notify, }; struct efi_simple_text_input_protocol efi_con_in = { .reset = efi_cin_reset, .read_key_stroke = efi_cin_read_key_stroke, .wait_for_key = NULL, }; static struct efi_event *console_timer_event; /* * efi_console_timer_notify() - notify the console timer event * * @event: console timer event * @context: not used */ static void EFIAPI efi_console_timer_notify(struct efi_event *event, void *context) { EFI_ENTRY("%p, %p", event, context); efi_cin_check(); EFI_EXIT(EFI_SUCCESS); } /** * efi_key_notify() - notify the wait for key event * * @event: wait for key event * @context: not used */ static void EFIAPI efi_key_notify(struct efi_event *event, void *context) { EFI_ENTRY("%p, %p", event, context); efi_cin_check(); EFI_EXIT(EFI_SUCCESS); } /** * efi_console_register() - install the console protocols * * This function is called from do_bootefi_exec(). * * Return: status code */ efi_status_t efi_console_register(void) { efi_status_t r; struct efi_device_path *dp; /* Install protocols on root node */ r = EFI_CALL(efi_install_multiple_protocol_interfaces (&efi_root, &efi_guid_text_output_protocol, &efi_con_out, &efi_guid_text_input_protocol, &efi_con_in, &efi_guid_text_input_ex_protocol, &efi_con_in_ex, NULL)); /* Create console node and install device path protocols */ if (CONFIG_IS_ENABLED(DM_SERIAL)) { dp = efi_dp_from_uart(); if (!dp) goto out_of_memory; /* Hook UART up to the device list */ efi_add_handle(&uart_obj); /* Install device path */ r = efi_add_protocol(&uart_obj, &efi_guid_device_path, dp); if (r != EFI_SUCCESS) goto out_of_memory; } /* Create console events */ r = efi_create_event(EVT_NOTIFY_WAIT, TPL_CALLBACK, efi_key_notify, NULL, NULL, &efi_con_in.wait_for_key); if (r != EFI_SUCCESS) { printf("ERROR: Failed to register WaitForKey event\n"); return r; } efi_con_in_ex.wait_for_key_ex = efi_con_in.wait_for_key; r = efi_create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL, TPL_CALLBACK, efi_console_timer_notify, NULL, NULL, &console_timer_event); if (r != EFI_SUCCESS) { printf("ERROR: Failed to register console event\n"); return r; } /* 5000 ns cycle is sufficient for 2 MBaud */ r = efi_set_timer(console_timer_event, EFI_TIMER_PERIODIC, 50); if (r != EFI_SUCCESS) printf("ERROR: Failed to set console timer\n"); return r; out_of_memory: printf("ERROR: Out of memory\n"); return r; }