/* 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 |