forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.4 KiB
118 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
|
/* |
|
* drivers/i2c/busses/i2c-ibm_iic.h |
|
* |
|
* Support for the IIC peripheral on IBM PPC 4xx |
|
* |
|
* Copyright (c) 2003 Zultys Technologies. |
|
* Eugene Surovegin <[email protected]> or <[email protected]> |
|
* |
|
* Based on original work by |
|
* Ian DaSilva <[email protected]> |
|
* Armin Kuster <[email protected]> |
|
* Matt Porter <[email protected]> |
|
* |
|
* Copyright 2000-2003 MontaVista Software Inc. |
|
*/ |
|
#ifndef __I2C_IBM_IIC_H_ |
|
#define __I2C_IBM_IIC_H_ |
|
|
|
#include <linux/i2c.h> |
|
|
|
struct iic_regs { |
|
u16 mdbuf; |
|
u16 sbbuf; |
|
u8 lmadr; |
|
u8 hmadr; |
|
u8 cntl; |
|
u8 mdcntl; |
|
u8 sts; |
|
u8 extsts; |
|
u8 lsadr; |
|
u8 hsadr; |
|
u8 clkdiv; |
|
u8 intmsk; |
|
u8 xfrcnt; |
|
u8 xtcntlss; |
|
u8 directcntl; |
|
}; |
|
|
|
struct ibm_iic_private { |
|
struct i2c_adapter adap; |
|
volatile struct iic_regs __iomem *vaddr; |
|
wait_queue_head_t wq; |
|
int idx; |
|
int irq; |
|
int fast_mode; |
|
u8 clckdiv; |
|
}; |
|
|
|
/* IICx_CNTL register */ |
|
#define CNTL_HMT 0x80 |
|
#define CNTL_AMD 0x40 |
|
#define CNTL_TCT_MASK 0x30 |
|
#define CNTL_TCT_SHIFT 4 |
|
#define CNTL_RPST 0x08 |
|
#define CNTL_CHT 0x04 |
|
#define CNTL_RW 0x02 |
|
#define CNTL_PT 0x01 |
|
|
|
/* IICx_MDCNTL register */ |
|
#define MDCNTL_FSDB 0x80 |
|
#define MDCNTL_FMDB 0x40 |
|
#define MDCNTL_EGC 0x20 |
|
#define MDCNTL_FSM 0x10 |
|
#define MDCNTL_ESM 0x08 |
|
#define MDCNTL_EINT 0x04 |
|
#define MDCNTL_EUBS 0x02 |
|
#define MDCNTL_HSCL 0x01 |
|
|
|
/* IICx_STS register */ |
|
#define STS_SSS 0x80 |
|
#define STS_SLPR 0x40 |
|
#define STS_MDBS 0x20 |
|
#define STS_MDBF 0x10 |
|
#define STS_SCMP 0x08 |
|
#define STS_ERR 0x04 |
|
#define STS_IRQA 0x02 |
|
#define STS_PT 0x01 |
|
|
|
/* IICx_EXTSTS register */ |
|
#define EXTSTS_IRQP 0x80 |
|
#define EXTSTS_BCS_MASK 0x70 |
|
#define EXTSTS_BCS_FREE 0x40 |
|
#define EXTSTS_IRQD 0x08 |
|
#define EXTSTS_LA 0x04 |
|
#define EXTSTS_ICT 0x02 |
|
#define EXTSTS_XFRA 0x01 |
|
|
|
/* IICx_INTRMSK register */ |
|
#define INTRMSK_EIRC 0x80 |
|
#define INTRMSK_EIRS 0x40 |
|
#define INTRMSK_EIWC 0x20 |
|
#define INTRMSK_EIWS 0x10 |
|
#define INTRMSK_EIHE 0x08 |
|
#define INTRMSK_EIIC 0x04 |
|
#define INTRMSK_EITA 0x02 |
|
#define INTRMSK_EIMTC 0x01 |
|
|
|
/* IICx_XFRCNT register */ |
|
#define XFRCNT_MTC_MASK 0x07 |
|
|
|
/* IICx_XTCNTLSS register */ |
|
#define XTCNTLSS_SRC 0x80 |
|
#define XTCNTLSS_SRS 0x40 |
|
#define XTCNTLSS_SWC 0x20 |
|
#define XTCNTLSS_SWS 0x10 |
|
#define XTCNTLSS_SRST 0x01 |
|
|
|
/* IICx_DIRECTCNTL register */ |
|
#define DIRCNTL_SDAC 0x08 |
|
#define DIRCNTL_SCC 0x04 |
|
#define DIRCNTL_MSDA 0x02 |
|
#define DIRCNTL_MSC 0x01 |
|
|
|
/* Check if we really control the I2C bus and bus is free */ |
|
#define DIRCTNL_FREE(v) (((v) & 0x0f) == 0x0f) |
|
|
|
#endif /* __I2C_IBM_IIC_H_ */
|
|
|