1/* 2 * drivers/i2c/busses/i2c-ibm_iic.h 3 * 4 * Support for the IIC peripheral on IBM PPC 4xx 5 * 6 * Copyright (c) 2003 Zultys Technologies. 7 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> 8 * 9 * Based on original work by 10 * Ian DaSilva <idasilva@mvista.com> 11 * Armin Kuster <akuster@mvista.com> 12 * Matt Porter <mporter@mvista.com> 13 * 14 * Copyright 2000-2003 MontaVista Software Inc. 15 * 16 * This program is free software; you can redistribute it and/or modify it 17 * under the terms of the GNU General Public License as published by the 18 * Free Software Foundation; either version 2 of the License, or (at your 19 * option) any later version. 20 * 21 */ 22#ifndef __I2C_IBM_IIC_H_ 23#define __I2C_IBM_IIC_H_ 24 25#include <linux/i2c.h> 26 27struct iic_regs { 28 u16 mdbuf; 29 u16 sbbuf; 30 u8 lmadr; 31 u8 hmadr; 32 u8 cntl; 33 u8 mdcntl; 34 u8 sts; 35 u8 extsts; 36 u8 lsadr; 37 u8 hsadr; 38 u8 clkdiv; 39 u8 intmsk; 40 u8 xfrcnt; 41 u8 xtcntlss; 42 u8 directcntl; 43}; 44 45struct ibm_iic_private { 46 struct i2c_adapter adap; 47 volatile struct iic_regs __iomem *vaddr; 48 wait_queue_head_t wq; 49 int idx; 50 int irq; 51 int fast_mode; 52 u8 clckdiv; 53}; 54 55/* IICx_CNTL register */ 56#define CNTL_HMT 0x80 57#define CNTL_AMD 0x40 58#define CNTL_TCT_MASK 0x30 59#define CNTL_TCT_SHIFT 4 60#define CNTL_RPST 0x08 61#define CNTL_CHT 0x04 62#define CNTL_RW 0x02 63#define CNTL_PT 0x01 64 65/* IICx_MDCNTL register */ 66#define MDCNTL_FSDB 0x80 67#define MDCNTL_FMDB 0x40 68#define MDCNTL_EGC 0x20 69#define MDCNTL_FSM 0x10 70#define MDCNTL_ESM 0x08 71#define MDCNTL_EINT 0x04 72#define MDCNTL_EUBS 0x02 73#define MDCNTL_HSCL 0x01 74 75/* IICx_STS register */ 76#define STS_SSS 0x80 77#define STS_SLPR 0x40 78#define STS_MDBS 0x20 79#define STS_MDBF 0x10 80#define STS_SCMP 0x08 81#define STS_ERR 0x04 82#define STS_IRQA 0x02 83#define STS_PT 0x01 84 85/* IICx_EXTSTS register */ 86#define EXTSTS_IRQP 0x80 87#define EXTSTS_BCS_MASK 0x70 88#define EXTSTS_BCS_FREE 0x40 89#define EXTSTS_IRQD 0x08 90#define EXTSTS_LA 0x04 91#define EXTSTS_ICT 0x02 92#define EXTSTS_XFRA 0x01 93 94/* IICx_INTRMSK register */ 95#define INTRMSK_EIRC 0x80 96#define INTRMSK_EIRS 0x40 97#define INTRMSK_EIWC 0x20 98#define INTRMSK_EIWS 0x10 99#define INTRMSK_EIHE 0x08 100#define INTRMSK_EIIC 0x04 101#define INTRMSK_EITA 0x02 102#define INTRMSK_EIMTC 0x01 103 104/* IICx_XFRCNT register */ 105#define XFRCNT_MTC_MASK 0x07 106 107/* IICx_XTCNTLSS register */ 108#define XTCNTLSS_SRC 0x80 109#define XTCNTLSS_SRS 0x40 110#define XTCNTLSS_SWC 0x20 111#define XTCNTLSS_SWS 0x10 112#define XTCNTLSS_SRST 0x01 113 114/* IICx_DIRECTCNTL register */ 115#define DIRCNTL_SDAC 0x08 116#define DIRCNTL_SCC 0x04 117#define DIRCNTL_MSDA 0x02 118#define DIRCNTL_MSC 0x01 119 120/* Check if we really control the I2C bus and bus is free */ 121#define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f) 122 123#endif /* __I2C_IBM_IIC_H_ */ 124