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efi_loader: EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL

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This patch implements the EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.

The implementation of notification functions is postponed to a later
patch.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-09-11 22:38:08 +02:00 committed by Alexander Graf
parent ca09f1df0c
commit 110c628058
2 changed files with 287 additions and 22 deletions
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56
include/efi_api.h
View file

@ -587,11 +587,67 @@ struct efi_simple_text_output_protocol {
struct simple_text_output_mode *mode;
};
#define EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID \
EFI_GUID(0xdd9e7534, 0x7762, 0x4698, \
0x8c, 0x14, 0xf5, 0x85, 0x17, 0xa6, 0x25, 0xaa)
struct efi_input_key {
u16 scan_code;
s16 unicode_char;
};
#define EFI_SHIFT_STATE_INVALID 0x00000000
#define EFI_RIGHT_SHIFT_PRESSED 0x00000001
#define EFI_LEFT_SHIFT_PRESSED 0x00000002
#define EFI_RIGHT_CONTROL_PRESSED 0x00000004
#define EFI_LEFT_CONTROL_PRESSED 0x00000008
#define EFI_RIGHT_ALT_PRESSED 0x00000010
#define EFI_LEFT_ALT_PRESSED 0x00000020
#define EFI_RIGHT_LOGO_PRESSED 0x00000040
#define EFI_LEFT_LOGO_PRESSED 0x00000080
#define EFI_MENU_KEY_PRESSED 0x00000100
#define EFI_SYS_REQ_PRESSED 0x00000200
#define EFI_SHIFT_STATE_VALID 0x80000000
#define EFI_TOGGLE_STATE_INVALID 0x00
#define EFI_SCROLL_LOCK_ACTIVE 0x01
#define EFI_NUM_LOCK_ACTIVE 0x02
#define EFI_CAPS_LOCK_ACTIVE 0x04
#define EFI_KEY_STATE_EXPOSED 0x40
#define EFI_TOGGLE_STATE_VALID 0x80
struct efi_key_state {
u32 key_shift_state;
u8 key_toggle_state;
};
struct efi_key_data {
struct efi_input_key key;
struct efi_key_state key_state;
};
struct efi_simple_text_input_ex_protocol {
efi_status_t (EFIAPI *reset) (
struct efi_simple_text_input_ex_protocol *this,
bool extended_verification);
efi_status_t (EFIAPI *read_key_stroke_ex) (
struct efi_simple_text_input_ex_protocol *this,
struct efi_key_data *key_data);
struct efi_event *wait_for_key_ex;
efi_status_t (EFIAPI *set_state) (
struct efi_simple_text_input_ex_protocol *this,
u8 key_toggle_state);
efi_status_t (EFIAPI *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 (EFIAPI *unregister_key_notify) (
struct efi_simple_text_input_ex_protocol *this,
void *notification_handle);
};
#define EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID \
EFI_GUID(0x387477c1, 0x69c7, 0x11d2, \
0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b)

253
lib/efi_loader/efi_console.c
View file

@ -42,10 +42,12 @@ static struct cout_mode efi_cout_modes[] = {
},
};
const efi_guid_t efi_guid_text_output_protocol =
EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID;
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"
@ -391,19 +393,19 @@ struct efi_simple_text_output_protocol efi_con_out = {
};
static bool key_available;
static struct efi_input_key next_key;
static struct efi_key_data next_key;
/**
* skip_modifiers() - analyze modifiers (shift, alt, ctrl) for function keys
* analyze_modifiers() - analyze modifiers (shift, alt, ctrl) for function keys
*
* This gets called when we have already parsed CSI.
*
* @modifiers: bitmask (shift, alt, ctrl)
* @return: the unmodified code
*/
static char skip_modifiers(int *modifiers)
static int analyze_modifiers(struct efi_key_state *key_state)
{
char c, mod = 0, ret = 0;
int c, mod = 0, ret = 0;
c = getc();
@ -429,8 +431,17 @@ static char skip_modifiers(int *modifiers)
out:
if (mod)
--mod;
if (modifiers)
*modifiers = mod;
key_state->key_shift_state = EFI_SHIFT_STATE_VALID;
if (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 & 8)
key_state->key_shift_state |= EFI_LEFT_LOGO_PRESSED;
}
if (!ret)
ret = c;
return ret;
@ -442,7 +453,7 @@ out:
* @key: - key received
* Return: - status code
*/
static efi_status_t efi_cin_read_key(struct efi_input_key *key)
static efi_status_t efi_cin_read_key(struct efi_key_data *key)
{
efi_status_t ret;
struct efi_input_key pressed_key = {
@ -454,6 +465,10 @@ static efi_status_t efi_cin_read_key(struct efi_input_key *key)
ret = console_read_unicode(&ch);
if (ret)
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 = '?';
@ -490,7 +505,7 @@ static efi_status_t efi_cin_read_key(struct efi_input_key *key)
pressed_key.scan_code = 5;
break;
case '1':
ch = skip_modifiers(NULL);
ch = analyze_modifiers(&key->key_state);
switch (ch) {
case '1'...'5': /* F1 - F5 */
pressed_key.scan_code = ch - '1' + 11;
@ -510,7 +525,7 @@ static efi_status_t efi_cin_read_key(struct efi_input_key *key)
}
break;
case '2':
ch = skip_modifiers(NULL);
ch = analyze_modifiers(&key->key_state);
switch (ch) {
case '0'...'1': /* F9 - F10 */
pressed_key.scan_code = ch - '0' + 19;
@ -525,15 +540,15 @@ static efi_status_t efi_cin_read_key(struct efi_input_key *key)
break;
case '3': /* DEL */
pressed_key.scan_code = 8;
skip_modifiers(NULL);
analyze_modifiers(&key->key_state);
break;
case '5': /* PG UP */
pressed_key.scan_code = 9;
skip_modifiers(NULL);
analyze_modifiers(&key->key_state);
break;
case '6': /* PG DOWN */
pressed_key.scan_code = 10;
skip_modifiers(NULL);
analyze_modifiers(&key->key_state);
break;
}
break;
@ -542,9 +557,28 @@ static efi_status_t efi_cin_read_key(struct efi_input_key *key)
/* Backspace */
ch = 0x08;
}
if (!pressed_key.scan_code)
if (pressed_key.scan_code) {
key->key_state.key_shift_state |= EFI_SHIFT_STATE_VALID;
} else {
pressed_key.unicode_char = ch;
*key = pressed_key;
/*
* 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;
}
@ -572,6 +606,170 @@ static void efi_cin_check(void)
}
}
/**
* efi_cin_empty_buffer() - empty input buffer
*/
static void efi_cin_empty_buffer(void)
{
while (tstc())
getc();
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;
}
*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: 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, %u", 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_ENTRY("%p, %p, %p, %p",
this, key_data, key_notify_function, notify_handle);
return EFI_EXIT(EFI_OUT_OF_RESOURCES);
}
/**
* 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_ENTRY("%p, %p", this, notification_handle);
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
/**
* efi_cin_reset() - drain the input buffer
*
@ -599,16 +797,13 @@ static efi_status_t EFIAPI efi_cin_reset
goto out;
}
/* Empty input buffer */
while (tstc())
getc();
key_available = false;
efi_cin_empty_buffer();
out:
return EFI_EXIT(ret);
}
/**
* efi_cin_reset() - drain the input buffer
* efi_cin_read_key_stroke() - read key stroke
*
* @this: instance of the EFI_SIMPLE_TEXT_INPUT_PROTOCOL
* @key: key read from console
@ -644,13 +839,22 @@ static efi_status_t EFIAPI efi_cin_read_key_stroke
ret = EFI_NOT_READY;
goto out;
}
*key = next_key;
*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,
@ -721,6 +925,10 @@ int efi_console_register(void)
if (r != EFI_SUCCESS)
goto out_of_memory;
systab.con_in_handle = efi_console_input_obj->handle;
r = efi_add_protocol(efi_console_input_obj->handle,
&efi_guid_text_input_ex_protocol, &efi_con_in_ex);
if (r != EFI_SUCCESS)
goto out_of_memory;
/* Create console events */
r = efi_create_event(EVT_NOTIFY_WAIT, TPL_CALLBACK, efi_key_notify,
@ -729,6 +937,7 @@ int efi_console_register(void)
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);