1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun #ifndef _LIBPS2_H 3*4882a593Smuzhiyun #define _LIBPS2_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * Copyright (C) 1999-2002 Vojtech Pavlik 7*4882a593Smuzhiyun * Copyright (C) 2004 Dmitry Torokhov 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <linux/bitops.h> 11*4882a593Smuzhiyun #include <linux/mutex.h> 12*4882a593Smuzhiyun #include <linux/types.h> 13*4882a593Smuzhiyun #include <linux/wait.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #define PS2_CMD_SETSCALE11 0x00e6 16*4882a593Smuzhiyun #define PS2_CMD_SETRES 0x10e8 17*4882a593Smuzhiyun #define PS2_CMD_GETID 0x02f2 18*4882a593Smuzhiyun #define PS2_CMD_RESET_BAT 0x02ff 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun #define PS2_RET_BAT 0xaa 21*4882a593Smuzhiyun #define PS2_RET_ID 0x00 22*4882a593Smuzhiyun #define PS2_RET_ACK 0xfa 23*4882a593Smuzhiyun #define PS2_RET_NAK 0xfe 24*4882a593Smuzhiyun #define PS2_RET_ERR 0xfc 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define PS2_FLAG_ACK BIT(0) /* Waiting for ACK/NAK */ 27*4882a593Smuzhiyun #define PS2_FLAG_CMD BIT(1) /* Waiting for a command to finish */ 28*4882a593Smuzhiyun #define PS2_FLAG_CMD1 BIT(2) /* Waiting for the first byte of command response */ 29*4882a593Smuzhiyun #define PS2_FLAG_WAITID BIT(3) /* Command executing is GET ID */ 30*4882a593Smuzhiyun #define PS2_FLAG_NAK BIT(4) /* Last transmission was NAKed */ 31*4882a593Smuzhiyun #define PS2_FLAG_ACK_CMD BIT(5) /* Waiting to ACK the command (first) byte */ 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun struct ps2dev { 34*4882a593Smuzhiyun struct serio *serio; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* Ensures that only one command is executing at a time */ 37*4882a593Smuzhiyun struct mutex cmd_mutex; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun /* Used to signal completion from interrupt handler */ 40*4882a593Smuzhiyun wait_queue_head_t wait; 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun unsigned long flags; 43*4882a593Smuzhiyun u8 cmdbuf[8]; 44*4882a593Smuzhiyun u8 cmdcnt; 45*4882a593Smuzhiyun u8 nak; 46*4882a593Smuzhiyun }; 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun void ps2_init(struct ps2dev *ps2dev, struct serio *serio); 49*4882a593Smuzhiyun int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout); 50*4882a593Smuzhiyun void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout); 51*4882a593Smuzhiyun void ps2_begin_command(struct ps2dev *ps2dev); 52*4882a593Smuzhiyun void ps2_end_command(struct ps2dev *ps2dev); 53*4882a593Smuzhiyun int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); 54*4882a593Smuzhiyun int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command); 55*4882a593Smuzhiyun int ps2_sliced_command(struct ps2dev *ps2dev, u8 command); 56*4882a593Smuzhiyun bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data); 57*4882a593Smuzhiyun bool ps2_handle_response(struct ps2dev *ps2dev, u8 data); 58*4882a593Smuzhiyun void ps2_cmd_aborted(struct ps2dev *ps2dev); 59*4882a593Smuzhiyun bool ps2_is_keyboard_id(u8 id); 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun #endif /* _LIBPS2_H */ 62