fti2c010.h
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/*
* Faraday I2C Controller
*
* (C) Copyright 2010 Faraday Technology
* Dante Su <dantesu@faraday-tech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __FTI2C010_H
#define __FTI2C010_H
/*
* FTI2C010 registers
*/
struct fti2c010_regs {
uint32_t cr; /* 0x00: control register */
uint32_t sr; /* 0x04: status register */
uint32_t cdr; /* 0x08: clock division register */
uint32_t dr; /* 0x0c: data register */
uint32_t sar; /* 0x10: slave address register */
uint32_t tgsr;/* 0x14: time & glitch suppression register */
uint32_t bmr; /* 0x18: bus monitor register */
uint32_t rsvd[5];
uint32_t revr;/* 0x30: revision register */
};
/*
* control register
*/
#define CR_ALIRQ 0x2000 /* arbitration lost interrupt (master) */
#define CR_SAMIRQ 0x1000 /* slave address match interrupt (slave) */
#define CR_STOPIRQ 0x800 /* stop condition interrupt (slave) */
#define CR_NAKRIRQ 0x400 /* NACK response interrupt (master) */
#define CR_DRIRQ 0x200 /* rx interrupt (both) */
#define CR_DTIRQ 0x100 /* tx interrupt (both) */
#define CR_TBEN 0x80 /* tx enable (both) */
#define CR_NAK 0x40 /* NACK (both) */
#define CR_STOP 0x20 /* stop (master) */
#define CR_START 0x10 /* start (master) */
#define CR_GCEN 0x8 /* general call support (slave) */
#define CR_SCLEN 0x4 /* enable clock out (master) */
#define CR_I2CEN 0x2 /* enable I2C (both) */
#define CR_I2CRST 0x1 /* reset I2C (both) */
#define CR_ENABLE \
(CR_ALIRQ | CR_NAKRIRQ | CR_DRIRQ | CR_DTIRQ | CR_SCLEN | CR_I2CEN)
/*
* status register
*/
#define SR_CLRAL 0x400 /* clear arbitration lost */
#define SR_CLRGC 0x200 /* clear general call */
#define SR_CLRSAM 0x100 /* clear slave address match */
#define SR_CLRSTOP 0x80 /* clear stop */
#define SR_CLRNAKR 0x40 /* clear NACK respond */
#define SR_DR 0x20 /* rx ready */
#define SR_DT 0x10 /* tx done */
#define SR_BB 0x8 /* bus busy */
#define SR_BUSY 0x4 /* chip busy */
#define SR_ACK 0x2 /* ACK/NACK received */
#define SR_RW 0x1 /* set when master-rx or slave-tx mode */
/*
* clock division register
*/
#define CDR_DIV(n) ((n) & 0x3ffff)
/*
* time & glitch suppression register
*/
#define TGSR_GSR(n) (((n) & 0x7) << 10)
#define TGSR_TSR(n) ((n) & 0x3ff)
/*
* bus monitor register
*/
#define BMR_SCL 0x2 /* SCL is pull-up */
#define BMR_SDA 0x1 /* SDA is pull-up */
#endif /* __FTI2C010_H */