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coreboot-kgpe-d16/src/acpi/acpigen_ps2_keybd.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <acpi/acpi.h>
#include <acpi/acpigen.h>
#include <acpi/acpigen_ps2_keybd.h>
#include <console/console.h>
#include <input-event-codes.h>
#include <stdbool.h>
#include <stdint.h>
#define KEYMAP(scancode, keycode) (((uint32_t)(scancode) << 16) | (keycode & 0xFFFF))
#define SCANCODE(keymap) ((keymap >> 16) & 0xFFFF)
/* Possible keymaps for function keys in the top row */
static const uint32_t function_keymaps[] = {
KEYMAP(0x3b, KEY_F1),
KEYMAP(0x3c, KEY_F2),
KEYMAP(0x3d, KEY_F3),
KEYMAP(0x3e, KEY_F4),
KEYMAP(0x3f, KEY_F5),
KEYMAP(0x40, KEY_F6),
KEYMAP(0x41, KEY_F7),
KEYMAP(0x42, KEY_F8),
KEYMAP(0x43, KEY_F9),
KEYMAP(0x44, KEY_F10),
KEYMAP(0x57, KEY_F11),
KEYMAP(0x58, KEY_F12),
KEYMAP(0x59, KEY_F13),
KEYMAP(0x5a, KEY_F14),
KEYMAP(0x5b, KEY_F15),
};
/*
* Possible keymaps for action keys in the top row. This is a superset of
* possible keys. Individual keyboards will have a subset of these keys.
* The scancodes are true / condensed 1 byte scancodes from set-1
*/
static const uint32_t action_keymaps[] = {
[PS2_KEY_BACK] = KEYMAP(0xea, KEY_BACK), /* e06a */
[PS2_KEY_FORWARD] = KEYMAP(0xe9, KEY_FORWARD), /* e069 */
[PS2_KEY_REFRESH] = KEYMAP(0xe7, KEY_REFRESH), /* e067 */
[PS2_KEY_FULLSCREEN] = KEYMAP(0x91, KEY_FULL_SCREEN), /* e011 */
[PS2_KEY_OVERVIEW] = KEYMAP(0x92, KEY_SCALE), /* e012 */
[PS2_KEY_VOL_MUTE] = KEYMAP(0xa0, KEY_MUTE), /* e020 */
[PS2_KEY_VOL_DOWN] = KEYMAP(0xae, KEY_VOLUMEDOWN), /* e02e */
[PS2_KEY_VOL_UP] = KEYMAP(0xb0, KEY_VOLUMEUP), /* e030 */
[PS2_KEY_PLAY_PAUSE] = KEYMAP(0x9a, KEY_PLAYPAUSE), /* e01a */
[PS2_KEY_NEXT_TRACK] = KEYMAP(0x99, KEY_NEXTSONG), /* e019 */
[PS2_KEY_PREV_TRACK] = KEYMAP(0x90, KEY_PREVIOUSSONG), /* e010 */
[PS2_KEY_SNAPSHOT] = KEYMAP(0x93, KEY_SYSRQ), /* e013 */
[PS2_KEY_BRIGHTNESS_DOWN] = KEYMAP(0x94, KEY_BRIGHTNESSDOWN),/* e014 */
[PS2_KEY_BRIGHTNESS_UP] = KEYMAP(0x95, KEY_BRIGHTNESSUP), /* e015 */
[PS2_KEY_KBD_BKLIGHT_DOWN] = KEYMAP(0x97, KEY_KBDILLUMDOWN), /* e017 */
[PS2_KEY_KBD_BKLIGHT_UP] = KEYMAP(0x98, KEY_KBDILLUMUP), /* e018 */
[PS2_KEY_PRIVACY_SCRN_TOGGLE] = KEYMAP(0x96, /* e016 */
KEY_PRIVACY_SCREEN_TOGGLE),
};
/* Keymap for numeric keypad keys */
static uint32_t numeric_keypad_keymaps[] = {
/* Row-0 */
KEYMAP(0xc9, KEY_PAGEUP),
KEYMAP(0xd1, KEY_PAGEDOWN),
KEYMAP(0xc7, KEY_HOME),
KEYMAP(0xcf, KEY_END),
/* Row-1 */
KEYMAP(0xd3, KEY_DELETE),
KEYMAP(0xb5, KEY_KPSLASH),
KEYMAP(0x37, KEY_KPASTERISK),
KEYMAP(0x4a, KEY_KPMINUS),
/* Row-2 */
KEYMAP(0x47, KEY_KP7),
KEYMAP(0x48, KEY_KP8),
KEYMAP(0x49, KEY_KP9),
KEYMAP(0x4e, KEY_KPPLUS),
/* Row-3 */
KEYMAP(0x4b, KEY_KP4),
KEYMAP(0x4c, KEY_KP5),
KEYMAP(0x4d, KEY_KP6),
/* Row-4 */
KEYMAP(0x4f, KEY_KP1),
KEYMAP(0x50, KEY_KP2),
KEYMAP(0x51, KEY_KP3),
KEYMAP(0x9c, KEY_KPENTER),
/* Row-5 */
KEYMAP(0x52, KEY_KP0),
KEYMAP(0x53, KEY_KPDOT),
};
/*
* Keymap for rest of non-top-row keys. This is a superset of all the possible
* keys that any chromeos keyboards can have.
*/
static uint32_t rest_of_keymaps[] = {
/* Row-0 */
KEYMAP(0x01, KEY_ESC),
/* Row-1 */
KEYMAP(0x29, KEY_GRAVE),
KEYMAP(0x02, KEY_1),
KEYMAP(0x03, KEY_2),
KEYMAP(0x04, KEY_3),
KEYMAP(0x05, KEY_4),
KEYMAP(0x06, KEY_5),
KEYMAP(0x07, KEY_6),
KEYMAP(0x08, KEY_7),
KEYMAP(0x09, KEY_8),
KEYMAP(0x0a, KEY_9),
KEYMAP(0x0b, KEY_0),
KEYMAP(0x0c, KEY_MINUS),
KEYMAP(0x0d, KEY_EQUAL),
KEYMAP(0x7d, KEY_YEN), /* JP keyboards only */
KEYMAP(0x0e, KEY_BACKSPACE),
/* Row-2 */
KEYMAP(0x0f, KEY_TAB),
KEYMAP(0x10, KEY_Q),
KEYMAP(0x11, KEY_W),
KEYMAP(0x12, KEY_E),
KEYMAP(0x13, KEY_R),
KEYMAP(0x14, KEY_T),
KEYMAP(0x15, KEY_Y),
KEYMAP(0x16, KEY_U),
KEYMAP(0x17, KEY_I),
KEYMAP(0x18, KEY_O),
KEYMAP(0x19, KEY_P),
KEYMAP(0x1a, KEY_LEFTBRACE),
KEYMAP(0x1b, KEY_RIGHTBRACE),
KEYMAP(0x2b, KEY_BACKSLASH),
/* Row-3 */
KEYMAP(0xdb, KEY_LEFTMETA), /* Search Key */
KEYMAP(0x1e, KEY_A),
KEYMAP(0x1f, KEY_S),
KEYMAP(0x20, KEY_D),
KEYMAP(0x21, KEY_F),
KEYMAP(0x22, KEY_G),
KEYMAP(0x23, KEY_H),
KEYMAP(0x24, KEY_J),
KEYMAP(0x25, KEY_K),
KEYMAP(0x26, KEY_L),
KEYMAP(0x27, KEY_SEMICOLON),
KEYMAP(0x28, KEY_APOSTROPHE),
KEYMAP(0x1c, KEY_ENTER),
/* Row-4 */
KEYMAP(0x2a, KEY_LEFTSHIFT),
KEYMAP(0x56, KEY_102ND), /* UK keyboards only */
KEYMAP(0x2c, KEY_Z),
KEYMAP(0x2d, KEY_X),
KEYMAP(0x2e, KEY_C),
KEYMAP(0x2f, KEY_V),
KEYMAP(0x30, KEY_B),
KEYMAP(0x31, KEY_N),
KEYMAP(0x32, KEY_M),
KEYMAP(0x33, KEY_COMMA),
KEYMAP(0x34, KEY_DOT),
KEYMAP(0x35, KEY_SLASH),
KEYMAP(0x73, KEY_RO), /* JP keyboards only */
KEYMAP(0x36, KEY_RIGHTSHIFT),
/* Row-5 */
KEYMAP(0x1d, KEY_LEFTCTRL),
KEYMAP(0x38, KEY_LEFTALT),
KEYMAP(0x7b, KEY_MUHENKAN), /* JP keyboards only */
KEYMAP(0x39, KEY_SPACE),
KEYMAP(0x79, KEY_HENKAN), /* JP keyboards only */
KEYMAP(0xb8, KEY_RIGHTALT),
KEYMAP(0x9d, KEY_RIGHTCTRL),
/* Arrow keys */
KEYMAP(0xcb, KEY_LEFT),
KEYMAP(0xd0, KEY_DOWN),
KEYMAP(0xcd, KEY_RIGHT),
KEYMAP(0xc8, KEY_UP),
/* Power Key */
KEYMAP(0xde, KEY_POWER),
};
static void ssdt_generate_physmap(struct acpi_dp *dp, uint8_t num_top_row_keys,
enum ps2_action_key action_keys[])
{
struct acpi_dp *dp_array;
enum ps2_action_key key;
uint32_t keymap, i;
dp_array = acpi_dp_new_table("function-row-physmap");
if (!dp_array) {
printk(BIOS_ERR, "PS2K: couldn't write function-row-physmap\n");
return;
}
printk(BIOS_INFO, "PS2K: Physmap: [");
for (i = 0; i < num_top_row_keys; i++) {
key = action_keys[i];
if (key && key < ARRAY_SIZE(action_keymaps)) {
keymap = action_keymaps[key];
} else {
keymap = 0;
printk(BIOS_ERR,
"PS2K: invalid top-action-key-%u: %u(skipped)\n",
i, key);
}
acpi_dp_add_integer(dp_array, NULL, SCANCODE(keymap));
printk(BIOS_INFO, " %X", SCANCODE(keymap));
}
printk(BIOS_INFO, " ]\n");
acpi_dp_add_array(dp, dp_array);
}
static void ssdt_generate_keymap(struct acpi_dp *dp, uint8_t num_top_row_keys,
enum ps2_action_key action_keys[],
bool can_send_function_keys,
bool has_numeric_keypad,
bool has_scrnlock_key)
{
struct acpi_dp *dp_array;
enum ps2_action_key key;
uint32_t keymap;
unsigned int i, total = 0;
dp_array = acpi_dp_new_table("linux,keymap");
if (!dp_array) {
printk(BIOS_ERR, "PS2K: couldn't write linux,keymap\n");
return;
}
/* Write out keymap for top row action keys */
for (i = 0; i < num_top_row_keys; i++) {
key = action_keys[i];
if (!key || key >= ARRAY_SIZE(action_keymaps)) {
printk(BIOS_ERR,
"PS2K: invalid top-action-key-%u: %u\n", i, key);
continue;
}
keymap = action_keymaps[key];
acpi_dp_add_integer(dp_array, NULL, keymap);
total++;
}
/* Write out keymap for function keys, if keyboard can send them */
if (can_send_function_keys) {
for (i = 0; i < num_top_row_keys; i++) {
keymap = function_keymaps[i];
acpi_dp_add_integer(dp_array, NULL, keymap);
}
total += num_top_row_keys;
}
/* Write out keymap for numeric keypad, if the keyboard has it */
if (has_numeric_keypad) {
for (i = 0; i < ARRAY_SIZE(numeric_keypad_keymaps); i++) {
keymap = numeric_keypad_keymaps[i];
acpi_dp_add_integer(dp_array, NULL, keymap);
}
total += ARRAY_SIZE(numeric_keypad_keymaps);
}
/* Provide keymap for screenlock only if it is present */
if (has_scrnlock_key) {
acpi_dp_add_integer(dp_array, NULL, KEYMAP(0x5d, KEY_SLEEP));
total++;
}
/* Write out keymap for rest of keys */
for (i = 0; i < ARRAY_SIZE(rest_of_keymaps); i++) {
keymap = rest_of_keymaps[i];
acpi_dp_add_integer(dp_array, NULL, keymap);
}
total += ARRAY_SIZE(rest_of_keymaps);
printk(BIOS_INFO, "PS2K: Passing %u keymaps to kernel\n", total);
acpi_dp_add_array(dp, dp_array);
}
void acpigen_ps2_keyboard_dsd(const char *scope, uint8_t num_top_row_keys,
enum ps2_action_key action_keys[],
bool can_send_function_keys,
bool has_numeric_keypad,
bool has_scrnlock_key)
{
struct acpi_dp *dsd;
if (!scope ||
num_top_row_keys < PS2_MIN_TOP_ROW_KEYS ||
num_top_row_keys > PS2_MAX_TOP_ROW_KEYS) {
printk(BIOS_ERR, "PS2K: %s: invalid args\n", __func__);
return;
}
dsd = acpi_dp_new_table("_DSD");
if (!dsd) {
printk(BIOS_ERR, "PS2K: couldn't write _DSD\n");
return;
}
acpigen_write_scope(scope);
ssdt_generate_physmap(dsd, num_top_row_keys, action_keys);
ssdt_generate_keymap(dsd, num_top_row_keys, action_keys,
can_send_function_keys, has_numeric_keypad,
has_scrnlock_key);
acpi_dp_write(dsd);
acpigen_pop_len(); /* Scope */
}
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