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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * drivers/i2c/busses/i2c-ibm_iic.h4 *5 * Support for the IIC peripheral on IBM PPC 4xx6 *7 * Copyright (c) 2003 Zultys Technologies.8 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>9 *10 * Based on original work by11 * Ian DaSilva <idasilva@mvista.com>12 * Armin Kuster <akuster@mvista.com>13 * Matt Porter <mporter@mvista.com>14 *15 * Copyright 2000-2003 MontaVista Software Inc.16 */17#ifndef __I2C_IBM_IIC_H_18#define __I2C_IBM_IIC_H_19 20#include <linux/i2c.h>21 22struct iic_regs {23 u16 mdbuf;24 u16 sbbuf;25 u8 lmadr;26 u8 hmadr;27 u8 cntl;28 u8 mdcntl;29 u8 sts;30 u8 extsts;31 u8 lsadr;32 u8 hsadr;33 u8 clkdiv;34 u8 intmsk;35 u8 xfrcnt;36 u8 xtcntlss;37 u8 directcntl;38};39 40struct ibm_iic_private {41 struct i2c_adapter adap;42 volatile struct iic_regs __iomem *vaddr;43 wait_queue_head_t wq;44 int idx;45 int irq;46 int fast_mode;47 u8 clckdiv;48};49 50/* IICx_CNTL register */51#define CNTL_HMT 0x8052#define CNTL_AMD 0x4053#define CNTL_TCT_MASK 0x3054#define CNTL_TCT_SHIFT 455#define CNTL_RPST 0x0856#define CNTL_CHT 0x0457#define CNTL_RW 0x0258#define CNTL_PT 0x0159 60/* IICx_MDCNTL register */61#define MDCNTL_FSDB 0x8062#define MDCNTL_FMDB 0x4063#define MDCNTL_EGC 0x2064#define MDCNTL_FSM 0x1065#define MDCNTL_ESM 0x0866#define MDCNTL_EINT 0x0467#define MDCNTL_EUBS 0x0268#define MDCNTL_HSCL 0x0169 70/* IICx_STS register */71#define STS_SSS 0x8072#define STS_SLPR 0x4073#define STS_MDBS 0x2074#define STS_MDBF 0x1075#define STS_SCMP 0x0876#define STS_ERR 0x0477#define STS_IRQA 0x0278#define STS_PT 0x0179 80/* IICx_EXTSTS register */81#define EXTSTS_IRQP 0x8082#define EXTSTS_BCS_MASK 0x7083#define EXTSTS_BCS_FREE 0x4084#define EXTSTS_IRQD 0x0885#define EXTSTS_LA 0x0486#define EXTSTS_ICT 0x0287#define EXTSTS_XFRA 0x0188 89/* IICx_INTRMSK register */90#define INTRMSK_EIRC 0x8091#define INTRMSK_EIRS 0x4092#define INTRMSK_EIWC 0x2093#define INTRMSK_EIWS 0x1094#define INTRMSK_EIHE 0x0895#define INTRMSK_EIIC 0x0496#define INTRMSK_EITA 0x0297#define INTRMSK_EIMTC 0x0198 99/* IICx_XFRCNT register */100#define XFRCNT_MTC_MASK 0x07101 102/* IICx_XTCNTLSS register */103#define XTCNTLSS_SRC 0x80104#define XTCNTLSS_SRS 0x40105#define XTCNTLSS_SWC 0x20106#define XTCNTLSS_SWS 0x10107#define XTCNTLSS_SRST 0x01108 109/* IICx_DIRECTCNTL register */110#define DIRCNTL_SDAC 0x08111#define DIRCNTL_SCC 0x04112#define DIRCNTL_MSDA 0x02113#define DIRCNTL_MSC 0x01114 115/* Check if we really control the I2C bus and bus is free */116#define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f)117 118#endif /* __I2C_IBM_IIC_H_ */119