LXR linux/include/linux/amba/kmi.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *  linux/include/asm-arm/hardware/amba_kmi.h
   4 *
   5 *  Internal header file for AMBA KMI ports
   6 *
   7 *  Copyright (C) 2000 Deep Blue Solutions Ltd.
   8 *
   9 * ---------------------------------------------------------------------------
  10 *  From ARM PrimeCell(tm) PS2 Keyboard/Mouse Interface (PL050) Technical
  11 *  Reference Manual - ARM DDI 0143B - see http://www.arm.com/
  12 * ---------------------------------------------------------------------------
  13 */
  14#ifndef ASM_ARM_HARDWARE_AMBA_KMI_H
  15#define ASM_ARM_HARDWARE_AMBA_KMI_H
  16
  17/*
  18 * KMI control register:
  19 *  KMICR_TYPE       0 = PS2/AT mode, 1 = No line control bit mode
  20 *  KMICR_RXINTREN   1 = enable RX interrupts
  21 *  KMICR_TXINTREN   1 = enable TX interrupts
  22 *  KMICR_EN         1 = enable KMI
  23 *  KMICR_FD         1 = force KMI data low
  24 *  KMICR_FC         1 = force KMI clock low
  25 */
  26#define KMICR           (KMI_BASE + 0x00)
  27#define KMICR_TYPE              (1 << 5)
  28#define KMICR_RXINTREN          (1 << 4)
  29#define KMICR_TXINTREN          (1 << 3)
  30#define KMICR_EN                (1 << 2)
  31#define KMICR_FD                (1 << 1)
  32#define KMICR_FC                (1 << 0)
  33
  34/*
  35 * KMI status register:
  36 *  KMISTAT_TXEMPTY  1 = transmitter register empty
  37 *  KMISTAT_TXBUSY   1 = currently sending data
  38 *  KMISTAT_RXFULL   1 = receiver register ready to be read
  39 *  KMISTAT_RXBUSY   1 = currently receiving data
  40 *  KMISTAT_RXPARITY parity of last databyte received
  41 *  KMISTAT_IC       current level of KMI clock input
  42 *  KMISTAT_ID       current level of KMI data input
  43 */
  44#define KMISTAT         (KMI_BASE + 0x04)
  45#define KMISTAT_TXEMPTY         (1 << 6)
  46#define KMISTAT_TXBUSY          (1 << 5)
  47#define KMISTAT_RXFULL          (1 << 4)
  48#define KMISTAT_RXBUSY          (1 << 3)
  49#define KMISTAT_RXPARITY        (1 << 2)
  50#define KMISTAT_IC              (1 << 1)
  51#define KMISTAT_ID              (1 << 0)
  52
  53/*
  54 * KMI data register
  55 */
  56#define KMIDATA         (KMI_BASE + 0x08)
  57
  58/*
  59 * KMI clock divisor: to generate 8MHz internal clock
  60 *  div = (ref / 8MHz) - 1; 0 <= div <= 15
  61 */
  62#define KMICLKDIV       (KMI_BASE + 0x0c)
  63
  64/*
  65 * KMI interrupt register:
  66 *  KMIIR_TXINTR     1 = transmit interrupt asserted
  67 *  KMIIR_RXINTR     1 = receive interrupt asserted
  68 */
  69#define KMIIR           (KMI_BASE + 0x10)
  70#define KMIIR_TXINTR            (1 << 1)
  71#define KMIIR_RXINTR            (1 << 0)
  72
  73/*
  74 * The size of the KMI primecell
  75 */
  76#define KMI_SIZE        (0x100)
  77
  78#endif
  79