| /* Copyright 2012 The ChromiumOS Authors |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| * |
| * i8042 keyboard protocol constants. |
| * |
| * See the IBM PS/2 Hardware Interface Technical Reference Manual |
| * |
| * https://archive.org/details/ps-2-hardware-interface-technical-reference-ocr/PS2HardwareInterfaceTechnicalReference-OCR/page/n371/mode/1up |
| */ |
| |
| #ifndef __CROS_EC_I8042_PROTOCOL_H |
| #define __CROS_EC_I8042_PROTOCOL_H |
| |
| /* Some commands appear more than once. Why? */ |
| |
| /* port 0x64 */ |
| #define I8042_READ_CMD_BYTE 0x20 |
| #define I8042_READ_CTL_RAM 0x21 |
| #define I8042_READ_CTL_RAM_END 0x3f |
| #define I8042_WRITE_CMD_BYTE 0x60 /* expect a byte on port 0x60 */ |
| #define I8042_WRITE_CTL_RAM 0x61 |
| #define I8042_WRITE_CTL_RAM_END 0x7f |
| #define I8042_ROUTE_AUX0 0x90 |
| #define I8042_ROUTE_AUX1 0x91 |
| #define I8042_ROUTE_AUX2 0x92 |
| #define I8042_ROUTE_AUX3 0x93 |
| #define I8042_ENA_PASSWORD 0xa6 |
| #define I8042_DIS_MOUSE 0xa7 |
| #define I8042_ENA_MOUSE 0xa8 |
| #define I8042_TEST_MOUSE 0xa9 |
| #define I8042_TEST_MOUSE_NO_ERROR 0x00 |
| #define I8042_TEST_MOUSE_CLK_STUCK_LOW 0x01 |
| #define I8042_TEST_MOUSE_CLK_STUCK_HIGH 0x02 |
| #define I8042_TEST_MOUSE_DATA_STUCK_LOW 0x03 |
| #define I8042_TEST_MOUSE_DATA_STUCK_HIGH 0x04 |
| #define I8042_RESET_SELF_TEST 0xaa |
| #define I8042_TEST_KB_PORT 0xab |
| #define I8042_DIS_KB 0xad |
| #define I8042_ENA_KB 0xae |
| #define I8042_READ_OUTPUT_PORT 0xd0 |
| #define I8042_WRITE_OUTPUT_PORT 0xd1 |
| #define I8042_ECHO_MOUSE 0xd3 /* expect a byte on port 0x60 */ |
| #define I8042_SEND_TO_MOUSE 0xd4 /* expect a byte on port 0x60 */ |
| #define I8042_DISABLE_A20 0xdd |
| #define I8042_ENABLE_A20 0xdf |
| #define I8042_PULSE_START 0xf0 |
| #define I8042_SYSTEM_RESET 0xfe |
| #define I8042_PULSE_END 0xff |
| |
| /* port 0x60 return value */ |
| #define I8042_RET_NAK 0xfe |
| |
| /* port 64 - command byte bits */ |
| #define I8042_XLATE BIT(6) |
| #define I8042_AUX_DIS BIT(5) |
| #define I8042_KBD_DIS BIT(4) |
| #define I8042_SYS_FLAG BIT(2) |
| #define I8042_ENIRQ12 BIT(1) |
| #define I8042_ENIRQ1 BIT(0) |
| |
| /* Status Flags */ |
| #define I8042_AUX_DATA BIT(5) |
| |
| #endif /* __CROS_EC_I8042_PROTOCOL_H */ |
