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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* linux/include/asm-arm/hardware/amba_kmi.h
*
* Internal header file for AMBA KMI ports
*
* Copyright (C) 2000 Deep Blue Solutions Ltd.
*
* ---------------------------------------------------------------------------
* From ARM PrimeCell(tm) PS2 Keyboard/Mouse Interface (PL050) Technical
* Reference Manual - ARM DDI 0143B - see http://www.arm.com/
* ---------------------------------------------------------------------------
*/
#ifndef ASM_ARM_HARDWARE_AMBA_KMI_H
#define ASM_ARM_HARDWARE_AMBA_KMI_H
/*
* KMI control register:
* KMICR_TYPE 0 = PS2/AT mode, 1 = No line control bit mode
* KMICR_RXINTREN 1 = enable RX interrupts
* KMICR_TXINTREN 1 = enable TX interrupts
* KMICR_EN 1 = enable KMI
* KMICR_FD 1 = force KMI data low
* KMICR_FC 1 = force KMI clock low
*/
#define KMICR (KMI_BASE + 0x00)
#define KMICR_TYPE (1 << 5)
#define KMICR_RXINTREN (1 << 4)
#define KMICR_TXINTREN (1 << 3)
#define KMICR_EN (1 << 2)
#define KMICR_FD (1 << 1)
#define KMICR_FC (1 << 0)
/*
* KMI status register:
* KMISTAT_TXEMPTY 1 = transmitter register empty
* KMISTAT_TXBUSY 1 = currently sending data
* KMISTAT_RXFULL 1 = receiver register ready to be read
* KMISTAT_RXBUSY 1 = currently receiving data
* KMISTAT_RXPARITY parity of last databyte received
* KMISTAT_IC current level of KMI clock input
* KMISTAT_ID current level of KMI data input
*/
#define KMISTAT (KMI_BASE + 0x04)
#define KMISTAT_TXEMPTY (1 << 6)
#define KMISTAT_TXBUSY (1 << 5)
#define KMISTAT_RXFULL (1 << 4)
#define KMISTAT_RXBUSY (1 << 3)
#define KMISTAT_RXPARITY (1 << 2)
#define KMISTAT_IC (1 << 1)
#define KMISTAT_ID (1 << 0)
/*
* KMI data register
*/
#define KMIDATA (KMI_BASE + 0x08)
/*
* KMI clock divisor: to generate 8MHz internal clock
* div = (ref / 8MHz) - 1; 0 <= div <= 15
*/
#define KMICLKDIV (KMI_BASE + 0x0c)
/*
* KMI interrupt register:
* KMIIR_TXINTR 1 = transmit interrupt asserted
* KMIIR_RXINTR 1 = receive interrupt asserted
*/
#define KMIIR (KMI_BASE + 0x10)
#define KMIIR_TXINTR (1 << 1)
#define KMIIR_RXINTR (1 << 0)
/*
* The size of the KMI primecell
*/
#define KMI_SIZE (0x100)
#endif
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