root/include/linux/amba/kmi.h

INCLUDED FROM

   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