include/linux/amba/kmi.h

   1 /*
   2  *  linux/include/asm-arm/hardware/amba_kmi.h
   3  *
   4  *  Internal header file for AMBA KMI ports
   5  *
   6  *  Copyright (C) 2000 Deep Blue Solutions Ltd.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  *
  23  * ---------------------------------------------------------------------------
  24  *  From ARM PrimeCell(tm) PS2 Keyboard/Mouse Interface (PL050) Technical
  25  *  Reference Manual - ARM DDI 0143B - see http://www.arm.com/
  26  * ---------------------------------------------------------------------------
  27  */
  28 #ifndef ASM_ARM_HARDWARE_AMBA_KMI_H
  29 #define ASM_ARM_HARDWARE_AMBA_KMI_H
  30
  31 /*
  32  * KMI control register:
  33  *  KMICR_TYPE       0 = PS2/AT mode, 1 = No line control bit mode
  34  *  KMICR_RXINTREN   1 = enable RX interrupts
  35  *  KMICR_TXINTREN   1 = enable TX interrupts
  36  *  KMICR_EN         1 = enable KMI
  37  *  KMICR_FD         1 = force KMI data low
  38  *  KMICR_FC         1 = force KMI clock low
  39  */
  40 #define KMICR           (KMI_BASE + 0x00)
  41 #define KMICR_TYPE              (1 << 5)
  42 #define KMICR_RXINTREN          (1 << 4)
  43 #define KMICR_TXINTREN          (1 << 3)
  44 #define KMICR_EN                (1 << 2)
  45 #define KMICR_FD                (1 << 1)
  46 #define KMICR_FC                (1 << 0)
  47
  48 /*
  49  * KMI status register:
  50  *  KMISTAT_TXEMPTY  1 = transmitter register empty
  51  *  KMISTAT_TXBUSY   1 = currently sending data
  52  *  KMISTAT_RXFULL   1 = receiver register ready to be read
  53  *  KMISTAT_RXBUSY   1 = currently receiving data
  54  *  KMISTAT_RXPARITY parity of last databyte received
  55  *  KMISTAT_IC       current level of KMI clock input
  56  *  KMISTAT_ID       current level of KMI data input
  57  */
  58 #define KMISTAT         (KMI_BASE + 0x04)
  59 #define KMISTAT_TXEMPTY         (1 << 6)
  60 #define KMISTAT_TXBUSY          (1 << 5)
  61 #define KMISTAT_RXFULL          (1 << 4)
  62 #define KMISTAT_RXBUSY          (1 << 3)
  63 #define KMISTAT_RXPARITY        (1 << 2)
  64 #define KMISTAT_IC              (1 << 1)
  65 #define KMISTAT_ID              (1 << 0)
  66
  67 /*
  68  * KMI data register
  69  */
  70 #define KMIDATA         (KMI_BASE + 0x08)
  71
  72 /*
  73  * KMI clock divisor: to generate 8MHz internal clock
  74  *  div = (ref / 8MHz) - 1; 0 <= div <= 15
  75  */
  76 #define KMICLKDIV       (KMI_BASE + 0x0c)
  77
  78 /*
  79  * KMI interrupt register:
  80  *  KMIIR_TXINTR     1 = transmit interrupt asserted
  81  *  KMIIR_RXINTR     1 = receive interrupt asserted
  82  */
  83 #define KMIIR           (KMI_BASE + 0x10)
  84 #define KMIIR_TXINTR            (1 << 1)
  85 #define KMIIR_RXINTR            (1 << 0)
  86
  87 /*
  88  * The size of the KMI primecell
  89  */
  90 #define KMI_SIZE        (0x100)
  91
  92 #endif