/* 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), [PS2_KEY_MICMUTE] = KEYMAP(0x9b, KEY_MICMUTE), /* e01b */ [PS2_KEY_KBD_BKLIGHT_TOGGLE] = KEYMAP(0x9e, KEY_KBDILLUMTOGGLE), /* e01e */ }; /* 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 */ }