forked from mirrors/linux
2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* drivers/i2c/busses/i2c-ibm_iic.h
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*
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* Support for the IIC peripheral on IBM PPC 4xx
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*
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* Copyright (c) 2003 Zultys Technologies.
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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*
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* Based on original work by
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* Ian DaSilva <idasilva@mvista.com>
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* Armin Kuster <akuster@mvista.com>
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* Matt Porter <mporter@mvista.com>
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*
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* Copyright 2000-2003 MontaVista Software Inc.
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*/
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#ifndef __I2C_IBM_IIC_H_
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#define __I2C_IBM_IIC_H_
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#include <linux/i2c.h>
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struct iic_regs {
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u16 mdbuf;
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u16 sbbuf;
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u8 lmadr;
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u8 hmadr;
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u8 cntl;
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u8 mdcntl;
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u8 sts;
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u8 extsts;
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u8 lsadr;
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u8 hsadr;
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u8 clkdiv;
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u8 intmsk;
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u8 xfrcnt;
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u8 xtcntlss;
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u8 directcntl;
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};
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struct ibm_iic_private {
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struct i2c_adapter adap;
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volatile struct iic_regs __iomem *vaddr;
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wait_queue_head_t wq;
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int idx;
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int irq;
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int fast_mode;
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u8 clckdiv;
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};
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/* IICx_CNTL register */
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#define CNTL_HMT 0x80
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#define CNTL_AMD 0x40
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#define CNTL_TCT_MASK 0x30
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#define CNTL_TCT_SHIFT 4
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#define CNTL_RPST 0x08
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#define CNTL_CHT 0x04
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#define CNTL_RW 0x02
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#define CNTL_PT 0x01
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/* IICx_MDCNTL register */
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#define MDCNTL_FSDB 0x80
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#define MDCNTL_FMDB 0x40
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#define MDCNTL_EGC 0x20
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#define MDCNTL_FSM 0x10
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#define MDCNTL_ESM 0x08
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#define MDCNTL_EINT 0x04
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#define MDCNTL_EUBS 0x02
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#define MDCNTL_HSCL 0x01
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/* IICx_STS register */
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#define STS_SSS 0x80
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#define STS_SLPR 0x40
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#define STS_MDBS 0x20
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#define STS_MDBF 0x10
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#define STS_SCMP 0x08
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#define STS_ERR 0x04
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#define STS_IRQA 0x02
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#define STS_PT 0x01
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/* IICx_EXTSTS register */
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#define EXTSTS_IRQP 0x80
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#define EXTSTS_BCS_MASK 0x70
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#define EXTSTS_BCS_FREE 0x40
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#define EXTSTS_IRQD 0x08
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#define EXTSTS_LA 0x04
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#define EXTSTS_ICT 0x02
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#define EXTSTS_XFRA 0x01
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/* IICx_INTRMSK register */
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#define INTRMSK_EIRC 0x80
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#define INTRMSK_EIRS 0x40
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#define INTRMSK_EIWC 0x20
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#define INTRMSK_EIWS 0x10
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#define INTRMSK_EIHE 0x08
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#define INTRMSK_EIIC 0x04
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#define INTRMSK_EITA 0x02
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#define INTRMSK_EIMTC 0x01
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/* IICx_XFRCNT register */
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#define XFRCNT_MTC_MASK 0x07
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/* IICx_XTCNTLSS register */
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#define XTCNTLSS_SRC 0x80
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#define XTCNTLSS_SRS 0x40
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#define XTCNTLSS_SWC 0x20
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#define XTCNTLSS_SWS 0x10
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#define XTCNTLSS_SRST 0x01
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/* IICx_DIRECTCNTL register */
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#define DIRCNTL_SDAC 0x08
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#define DIRCNTL_SCC 0x04
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#define DIRCNTL_MSDA 0x02
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#define DIRCNTL_MSC 0x01
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/* Check if we really control the I2C bus and bus is free */
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#define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f)
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#endif /* __I2C_IBM_IIC_H_ */
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