arch/x86/acpi: Add code to generate ACPI for PS2 keyboards
Add new file to generate ACPI _DSD code for PS2 keyboards. The following 2 device properties are generated as needed: function-row-phymap: A list of ordered scancodes for function row. linux,keymap: Symantically, this is an array of "scancode,keycode" tuple entries. Each entry teaches linux the keycode corresponding to a scancode. Signed-off-by: Rajat Jain <rajatja@google.com> Change-Id: I5ee05173106a125793e91c263610731543c85472 Reviewed-on: https://review.coreboot.org/c/coreboot/+/40031 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Rajat Jain
Furquan Shaikh
parent
e6b0a32cb3
commit
a28e3fb694
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@ -235,6 +235,7 @@ ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpigen.c
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ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpigen_dsm.c
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ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi_device.c
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ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi_pld.c
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ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpigen_ps2_keybd.c
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ramstage-$(CONFIG_HAVE_ACPI_RESUME) += acpi_s3.c
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ramstage-$(CONFIG_ACPI_BERT) += acpi_bert_storage.c
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ramstage-y += c_start.S
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@ -0,0 +1,297 @@
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/*
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* This file is part of the coreboot project.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <arch/acpi.h>
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#include <arch/acpigen.h>
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#include <arch/acpigen_ps2_keybd.h>
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#include <console/console.h>
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#include <input-event-codes.h>
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#define KEYMAP(scancode, keycode) (((uint32_t)(scancode) << 16) | (keycode & 0xFFFF))
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#define SCANCODE(keymap) ((keymap >> 16) & 0xFFFF)
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/* Possible keymaps for function keys in the top row */
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static const uint32_t function_keymaps[] = {
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KEYMAP(0x3b, KEY_F1),
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KEYMAP(0x3c, KEY_F2),
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KEYMAP(0x3d, KEY_F3),
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KEYMAP(0x3e, KEY_F4),
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KEYMAP(0x3f, KEY_F5),
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KEYMAP(0x40, KEY_F6),
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KEYMAP(0x41, KEY_F7),
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KEYMAP(0x42, KEY_F8),
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KEYMAP(0x43, KEY_F9),
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KEYMAP(0x44, KEY_F10),
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KEYMAP(0x57, KEY_F11),
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KEYMAP(0x58, KEY_F12),
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KEYMAP(0x59, KEY_F13),
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KEYMAP(0x5a, KEY_F14),
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KEYMAP(0x5b, KEY_F15),
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};
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/*
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* Possible keymaps for action keys in the top row. This is a superset of
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* possible keys. Individual keyboards will have a subset of these keys.
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* The scancodes are true / condensed 1 byte scancodes from set-1
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*/
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static const uint32_t action_keymaps[] = {
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[PS2_KEY_BACK] = KEYMAP(0xea, KEY_BACK), /* e06a */
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[PS2_KEY_FORWARD] = KEYMAP(0xe9, KEY_FORWARD), /* e069 */
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[PS2_KEY_REFRESH] = KEYMAP(0xe7, KEY_REFRESH), /* e067 */
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[PS2_KEY_FULLSCREEN] = KEYMAP(0x91, KEY_FULL_SCREEN), /* e011 */
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[PS2_KEY_OVERVIEW] = KEYMAP(0x92, KEY_SCALE), /* e012 */
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[PS2_KEY_VOL_MUTE] = KEYMAP(0xa0, KEY_MUTE), /* e020 */
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[PS2_KEY_VOL_DOWN] = KEYMAP(0xae, KEY_VOLUMEDOWN), /* e02e */
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[PS2_KEY_VOL_UP] = KEYMAP(0xb0, KEY_VOLUMEUP), /* e030 */
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[PS2_KEY_PLAY_PAUSE] = KEYMAP(0x9a, KEY_PLAYPAUSE), /* e01a */
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[PS2_KEY_NEXT_TRACK] = KEYMAP(0x99, KEY_NEXTSONG), /* e019 */
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[PS2_KEY_PREV_TRACK] = KEYMAP(0x90, KEY_PREVIOUSSONG), /* e010 */
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[PS2_KEY_SNAPSHOT] = KEYMAP(0x93, KEY_SYSRQ), /* e013 */
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[PS2_KEY_BRIGHTNESS_DOWN] = KEYMAP(0x94, KEY_BRIGHTNESSDOWN),/* e014 */
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[PS2_KEY_BRIGHTNESS_UP] = KEYMAP(0x95, KEY_BRIGHTNESSUP), /* e015 */
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[PS2_KEY_KBD_BKLIGHT_DOWN] = KEYMAP(0x97, KEY_KBDILLUMDOWN), /* e017 */
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[PS2_KEY_KBD_BKLIGHT_UP] = KEYMAP(0x98, KEY_KBDILLUMUP), /* e018 */
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[PS2_KEY_PRIVACY_SCRN_TOGGLE] = KEYMAP(0x96, /* e016 */
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KEY_PRIVACY_SCREEN_TOGGLE),
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};
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/* Keymap for numeric keypad keys */
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static uint32_t numeric_keypad_keymaps[] = {
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/* Row-0 */
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KEYMAP(0xc9, KEY_PAGEUP),
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KEYMAP(0xd1, KEY_PAGEDOWN),
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KEYMAP(0xc7, KEY_HOME),
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KEYMAP(0xcf, KEY_END),
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/* Row-1 */
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KEYMAP(0xd3, KEY_DELETE),
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KEYMAP(0xb5, KEY_KPSLASH),
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KEYMAP(0x37, KEY_KPASTERISK),
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KEYMAP(0x4a, KEY_KPMINUS),
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/* Row-2 */
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KEYMAP(0x47, KEY_KP7),
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KEYMAP(0x48, KEY_KP8),
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KEYMAP(0x49, KEY_KP9),
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KEYMAP(0x4e, KEY_KPPLUS),
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/* Row-3 */
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KEYMAP(0x4b, KEY_KP4),
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KEYMAP(0x4c, KEY_KP5),
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KEYMAP(0x4d, KEY_KP6),
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/* Row-4 */
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KEYMAP(0x4f, KEY_KP1),
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KEYMAP(0x50, KEY_KP2),
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KEYMAP(0x51, KEY_KP3),
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KEYMAP(0x9c, KEY_KPENTER),
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/* Row-5 */
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KEYMAP(0x52, KEY_KP0),
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KEYMAP(0x53, KEY_KPDOT),
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};
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/*
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* Keymap for rest of non-top-row keys. This is a superset of all the possible
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* keys that any chromeos keyboards can have.
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*/
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static uint32_t rest_of_keymaps[] = {
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/* Row-0 */
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KEYMAP(0x01, KEY_ESC),
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/* Row-1 */
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KEYMAP(0x29, KEY_GRAVE),
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KEYMAP(0x02, KEY_1),
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KEYMAP(0x03, KEY_2),
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KEYMAP(0x04, KEY_3),
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KEYMAP(0x05, KEY_4),
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KEYMAP(0x06, KEY_5),
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KEYMAP(0x07, KEY_6),
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KEYMAP(0x08, KEY_7),
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KEYMAP(0x09, KEY_8),
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KEYMAP(0x0a, KEY_9),
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KEYMAP(0x0b, KEY_0),
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KEYMAP(0x0c, KEY_MINUS),
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KEYMAP(0x0d, KEY_EQUAL),
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KEYMAP(0x0e, KEY_BACKSPACE),
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/* Row-2 */
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KEYMAP(0x0f, KEY_TAB),
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KEYMAP(0x10, KEY_Q),
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KEYMAP(0x11, KEY_W),
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KEYMAP(0x12, KEY_E),
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KEYMAP(0x13, KEY_R),
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KEYMAP(0x14, KEY_T),
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KEYMAP(0x15, KEY_Y),
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KEYMAP(0x16, KEY_U),
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KEYMAP(0x17, KEY_I),
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KEYMAP(0x18, KEY_O),
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KEYMAP(0x19, KEY_P),
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KEYMAP(0x1a, KEY_LEFTBRACE),
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KEYMAP(0x1b, KEY_RIGHTBRACE),
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KEYMAP(0x2b, KEY_BACKSLASH),
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/* Row-3 */
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KEYMAP(0xdb, KEY_LEFTMETA),
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KEYMAP(0x1e, KEY_A),
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KEYMAP(0x1f, KEY_S),
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KEYMAP(0x20, KEY_D),
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KEYMAP(0x21, KEY_F),
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KEYMAP(0x22, KEY_G),
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KEYMAP(0x23, KEY_H),
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KEYMAP(0x24, KEY_J),
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KEYMAP(0x25, KEY_K),
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KEYMAP(0x26, KEY_L),
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KEYMAP(0x27, KEY_SEMICOLON),
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KEYMAP(0x28, KEY_APOSTROPHE),
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KEYMAP(0x1c, KEY_ENTER),
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/* Row-4 */
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KEYMAP(0x2a, KEY_LEFTSHIFT),
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KEYMAP(0x2c, KEY_Z),
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KEYMAP(0x2d, KEY_X),
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KEYMAP(0x2e, KEY_C),
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KEYMAP(0x2f, KEY_V),
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KEYMAP(0x30, KEY_B),
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KEYMAP(0x31, KEY_N),
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KEYMAP(0x32, KEY_M),
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KEYMAP(0x33, KEY_COMMA),
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KEYMAP(0x34, KEY_DOT),
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KEYMAP(0x35, KEY_SLASH),
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KEYMAP(0x36, KEY_RIGHTSHIFT),
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/* Row-5 */
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KEYMAP(0x1d, KEY_LEFTCTRL),
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KEYMAP(0x38, KEY_LEFTALT),
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KEYMAP(0x39, KEY_SPACE),
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KEYMAP(0xb8, KEY_RIGHTALT),
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KEYMAP(0x9d, KEY_RIGHTCTRL),
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/* Arrow keys */
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KEYMAP(0xcb, KEY_LEFT),
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KEYMAP(0xd0, KEY_DOWN),
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KEYMAP(0xcd, KEY_RIGHT),
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KEYMAP(0xc8, KEY_UP),
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};
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static void ssdt_generate_physmap(struct acpi_dp *dp, uint8_t num_top_row_keys,
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enum ps2_action_key action_keys[])
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{
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struct acpi_dp *dp_array;
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enum ps2_action_key key;
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uint32_t keymap, i;
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dp_array = acpi_dp_new_table("function-row-physmap");
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if (!dp_array) {
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printk(BIOS_ERR, "PS2K: couldn't write function-row-physmap\n");
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return;
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}
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printk(BIOS_INFO, "PS2K: Physmap: [");
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for (i = 0; i < num_top_row_keys; i++) {
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key = action_keys[i];
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if (key && key < ARRAY_SIZE(action_keymaps)) {
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keymap = action_keymaps[key];
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} else {
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keymap = 0;
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printk(BIOS_ERR,
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"PS2K: invalid top-action-key-%u: %u(skipped)\n",
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i, key);
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}
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acpi_dp_add_integer(dp_array, NULL, SCANCODE(keymap));
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printk(BIOS_INFO, " %X", SCANCODE(keymap));
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}
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printk(BIOS_INFO, " ]\n");
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acpi_dp_add_array(dp, dp_array);
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}
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static void ssdt_generate_keymap(struct acpi_dp *dp, uint8_t num_top_row_keys,
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enum ps2_action_key action_keys[],
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bool can_send_function_keys,
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bool has_numeric_keypad,
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bool has_scrnlock_key)
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{
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struct acpi_dp *dp_array;
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enum ps2_action_key key;
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uint32_t keymap;
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unsigned int i, total = 0;
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dp_array = acpi_dp_new_table("linux,keymap");
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if (!dp_array) {
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printk(BIOS_ERR, "PS2K: couldn't write linux,keymap\n");
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return;
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}
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/* Write out keymap for top row action keys */
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for (i = 0; i < num_top_row_keys; i++) {
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key = action_keys[i];
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if (!key || key >= ARRAY_SIZE(action_keymaps)) {
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printk(BIOS_ERR,
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"PS2K: invalid top-action-key-%u: %u\n", i, key);
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continue;
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}
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keymap = action_keymaps[key];
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acpi_dp_add_integer(dp_array, NULL, keymap);
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total++;
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}
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/* Write out keymap for function keys, if keyboard can send them */
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if (can_send_function_keys) {
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for (i = 0; i < num_top_row_keys; i++) {
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keymap = function_keymaps[i];
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acpi_dp_add_integer(dp_array, NULL, keymap);
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}
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total += num_top_row_keys;
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}
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/* Write out keymap for numeric keypad, if the keyboard has it */
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if (has_numeric_keypad) {
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for (i = 0; i < ARRAY_SIZE(numeric_keypad_keymaps); i++) {
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keymap = numeric_keypad_keymaps[i];
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acpi_dp_add_integer(dp_array, NULL, keymap);
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}
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total += ARRAY_SIZE(numeric_keypad_keymaps);
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}
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/* Provide keymap for screenlock only if it is present */
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if (has_scrnlock_key) {
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acpi_dp_add_integer(dp_array, NULL, KEYMAP(0x5d, KEY_SLEEP));
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total++;
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}
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/* Write out keymap for rest of keys */
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for (i = 0; i < ARRAY_SIZE(rest_of_keymaps); i++) {
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keymap = rest_of_keymaps[i];
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acpi_dp_add_integer(dp_array, NULL, keymap);
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}
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total += ARRAY_SIZE(rest_of_keymaps);
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printk(BIOS_INFO, "PS2K: Passing %u keymaps to kernel\n", total);
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acpi_dp_add_array(dp, dp_array);
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}
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void acpigen_ps2_keyboard_dsd(const char *scope, uint8_t num_top_row_keys,
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enum ps2_action_key action_keys[],
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bool can_send_function_keys,
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bool has_numeric_keypad,
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bool has_scrnlock_key)
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{
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struct acpi_dp *dsd;
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if (!scope ||
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num_top_row_keys < PS2_MIN_TOP_ROW_KEYS ||
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num_top_row_keys > PS2_MAX_TOP_ROW_KEYS) {
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printk(BIOS_ERR, "PS2K: %s: invalid args\n", __func__);
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return;
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}
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dsd = acpi_dp_new_table("_DSD");
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if (!dsd) {
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printk(BIOS_ERR, "PS2K: couldn't write _DSD\n");
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return;
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}
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acpigen_write_scope(scope);
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ssdt_generate_physmap(dsd, num_top_row_keys, action_keys);
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ssdt_generate_keymap(dsd, num_top_row_keys, action_keys,
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can_send_function_keys, has_numeric_keypad,
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has_scrnlock_key);
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acpi_dp_write(dsd);
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acpigen_pop_len(); /* Scope */
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}
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@ -0,0 +1,41 @@
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/*
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* This file is part of the coreboot project.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __ACPIGEN_PS2_KEYBD_H__
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#define __ACPIGEN_PS2_KEYBD_H__
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#include <types.h>
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enum ps2_action_key {
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PS2_KEY_ABSENT = 0,
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PS2_KEY_BACK,
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PS2_KEY_FORWARD,
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PS2_KEY_REFRESH,
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PS2_KEY_FULLSCREEN,
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PS2_KEY_OVERVIEW,
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PS2_KEY_BRIGHTNESS_DOWN,
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PS2_KEY_BRIGHTNESS_UP,
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PS2_KEY_VOL_MUTE,
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PS2_KEY_VOL_DOWN,
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PS2_KEY_VOL_UP,
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PS2_KEY_SNAPSHOT,
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PS2_KEY_PRIVACY_SCRN_TOGGLE,
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PS2_KEY_KBD_BKLIGHT_DOWN,
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PS2_KEY_KBD_BKLIGHT_UP,
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PS2_KEY_PLAY_PAUSE,
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PS2_KEY_NEXT_TRACK,
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PS2_KEY_PREV_TRACK,
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};
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#define PS2_MIN_TOP_ROW_KEYS 10
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#define PS2_MAX_TOP_ROW_KEYS 15
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void acpigen_ps2_keyboard_dsd(const char *scope, uint8_t num_top_row_keys,
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enum ps2_action_key action_keys[],
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bool can_send_function_keys,
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bool has_numeric_keypad, bool has_scrnlock_key);
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#endif /* __ACPIGEN_PS2_KEYBD_H__ */
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