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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/linux/amba/kmi.h
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/*

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 *  linux/include/asm-arm/hardware/amba_kmi.h

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 *

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 *  Internal header file for AMBA KMI ports

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 *

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 *  Copyright (C) 2000 Deep Blue Solutions Ltd.

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License as published by

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 * the Free Software Foundation; either version 2 of the License, or

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 * (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 * GNU General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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 *

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 *

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 * ---------------------------------------------------------------------------

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 *  From ARM PrimeCell(tm) PS2 Keyboard/Mouse Interface (PL050) Technical

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 *  Reference Manual - ARM DDI 0143B - see http://www.arm.com/

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 * ---------------------------------------------------------------------------

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 */

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#ifndef ASM_ARM_HARDWARE_AMBA_KMI_H

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#define ASM_ARM_HARDWARE_AMBA_KMI_H

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/*

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 * KMI control register:

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 *  KMICR_TYPE       0 = PS2/AT mode, 1 = No line control bit mode

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 *  KMICR_RXINTREN   1 = enable RX interrupts

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 *  KMICR_TXINTREN   1 = enable TX interrupts

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 *  KMICR_EN         1 = enable KMI

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 *  KMICR_FD         1 = force KMI data low

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 *  KMICR_FC         1 = force KMI clock low

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 */

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#define KMICR		(KMI_BASE + 0x00)

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#define KMICR_TYPE		(1 << 5)

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#define KMICR_RXINTREN		(1 << 4)

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#define KMICR_TXINTREN		(1 << 3)

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#define KMICR_EN		(1 << 2)

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#define KMICR_FD		(1 << 1)

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#define KMICR_FC		(1 << 0)

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/*

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 * KMI status register:

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 *  KMISTAT_TXEMPTY  1 = transmitter register empty

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 *  KMISTAT_TXBUSY   1 = currently sending data

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 *  KMISTAT_RXFULL   1 = receiver register ready to be read

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 *  KMISTAT_RXBUSY   1 = currently receiving data

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 *  KMISTAT_RXPARITY parity of last databyte received

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 *  KMISTAT_IC       current level of KMI clock input

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 *  KMISTAT_ID       current level of KMI data input

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 */

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#define KMISTAT		(KMI_BASE + 0x04)

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#define KMISTAT_TXEMPTY		(1 << 6)

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#define KMISTAT_TXBUSY		(1 << 5)

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#define KMISTAT_RXFULL		(1 << 4)

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#define KMISTAT_RXBUSY		(1 << 3)

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#define KMISTAT_RXPARITY	(1 << 2)

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#define KMISTAT_IC		(1 << 1)

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#define KMISTAT_ID		(1 << 0)

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/*

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 * KMI data register

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 */

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#define KMIDATA		(KMI_BASE + 0x08)

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/*

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 * KMI clock divisor: to generate 8MHz internal clock

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 *  div = (ref / 8MHz) - 1; 0 <= div <= 15

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 */

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#define KMICLKDIV	(KMI_BASE + 0x0c)

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/*

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 * KMI interrupt register:

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 *  KMIIR_TXINTR     1 = transmit interrupt asserted

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 *  KMIIR_RXINTR     1 = receive interrupt asserted

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 */

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#define KMIIR		(KMI_BASE + 0x10)

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#define KMIIR_TXINTR		(1 << 1)

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#define KMIIR_RXINTR		(1 << 0)

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/*

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 * The size of the KMI primecell

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 */

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#define KMI_SIZE	(0x100)

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#endif

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