96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
/*
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* (C) Copyright 2007-2009
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _4xx_i2c_h_
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#define _4xx_i2c_h_
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#define IIC_OK 0
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#define IIC_NOK 1
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#define IIC_NOK_LA 2 /* Lost arbitration */
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#define IIC_NOK_ICT 3 /* Incomplete transfer */
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#define IIC_NOK_XFRA 4 /* Transfer aborted */
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#define IIC_NOK_DATA 5 /* No data in buffer */
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#define IIC_NOK_TOUT 6 /* Transfer timeout */
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#define IIC_TIMEOUT 1 /* 1 second */
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struct ppc4xx_i2c {
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u8 mdbuf;
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u8 res1;
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u8 sdbuf;
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u8 res2;
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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 intrmsk;
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u8 xfrcnt;
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u8 xtcntlss;
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u8 directcntl;
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u8 intr;
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};
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/* MDCNTL Register Bit definition */
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#define IIC_MDCNTL_HSCL 0x01
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#define IIC_MDCNTL_EUBS 0x02
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#define IIC_MDCNTL_EINT 0x04
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#define IIC_MDCNTL_ESM 0x08
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#define IIC_MDCNTL_FSM 0x10
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#define IIC_MDCNTL_EGC 0x20
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#define IIC_MDCNTL_FMDB 0x40
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#define IIC_MDCNTL_FSDB 0x80
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/* CNTL Register Bit definition */
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#define IIC_CNTL_PT 0x01
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#define IIC_CNTL_READ 0x02
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#define IIC_CNTL_CHT 0x04
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#define IIC_CNTL_RPST 0x08
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/* bit 2/3 for Transfer count*/
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#define IIC_CNTL_AMD 0x40
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#define IIC_CNTL_HMT 0x80
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/* STS Register Bit definition */
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#define IIC_STS_PT 0x01
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#define IIC_STS_IRQA 0x02
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#define IIC_STS_ERR 0x04
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#define IIC_STS_SCMP 0x08
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#define IIC_STS_MDBF 0x10
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#define IIC_STS_MDBS 0x20
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#define IIC_STS_SLPR 0x40
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#define IIC_STS_SSS 0x80
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/* EXTSTS Register Bit definition */
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#define IIC_EXTSTS_XFRA 0x01
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#define IIC_EXTSTS_ICT 0x02
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#define IIC_EXTSTS_LA 0x04
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#define IIC_EXTSTS_BCS_MASK 0x70
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#define IIC_EXTSTS_BCS_FREE 0x40
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/* XTCNTLSS Register Bit definition */
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#define IIC_XTCNTLSS_SRST 0x01
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#define IIC_XTCNTLSS_EPI 0x02
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#define IIC_XTCNTLSS_SDBF 0x04
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#define IIC_XTCNTLSS_SBDD 0x08
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#define IIC_XTCNTLSS_SWS 0x10
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#define IIC_XTCNTLSS_SWC 0x20
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#define IIC_XTCNTLSS_SRS 0x40
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#define IIC_XTCNTLSS_SRC 0x80
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/* IICx_DIRECTCNTL register */
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#define IIC_DIRCNTL_SDAC 0x08
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#define IIC_DIRCNTL_SCC 0x04
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#define IIC_DIRCNTL_MSDA 0x02
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#define IIC_DIRCNTL_MSC 0x01
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#define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f)
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#endif
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