u-boot/lib/efi_loader/efi_console.c
Heinrich Schuchardt 68edbed454 efi_loader: initialize console size late
If CONFIG_VIDEO_DM=n we query the display size from the serial console.
Especially when using a remote console the response can be so late that
it interferes with autoboot.

Only query the console size when running an EFI binary.

Add debug output showing the determined console size.

Reported-by: Fabio Estevam <festevam@gmail.com>
Fixes: a57ad20d07 ("efi_loader: split efi_init_obj_list() into two stages")
Fixes: a9bf024b29 ("efi_loader: disk: a helper function to create efi_disk objects from udevice")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Tested-by: Fabio Estevam <festevam@denx.de>
Tested-by: Heiko Thiery <heiko.thiery@gmail.com>
2022-06-19 15:53:09 +02:00

1320 lines
32 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* EFI application console interface
*
* Copyright (c) 2016 Alexander Graf
*/
#define LOG_CATEGORY LOGC_EFI
#include <common.h>
#include <charset.h>
#include <malloc.h>
#include <time.h>
#include <dm/device.h>
#include <efi_loader.h>
#include <env.h>
#include <log.h>
#include <stdio_dev.h>
#include <video_console.h>
#include <linux/delay.h>
#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 <ESC>[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(&notify_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(&notify_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;
}