/* SPDX-License-Identifier: GPL-2.0-only */
/* ------------------------------------------------------------------------- */
/* i2c-iop3xx.h algorithm driver definitions private to i2c-iop3xx.c */
/* ------------------------------------------------------------------------- */
/* Copyright (C) 2003 Peter Milne, D-TACQ Solutions Ltd
* < Peter dot Milne at D hyphen TACQ dot com >
*/
/* ------------------------------------------------------------------------- */
#ifndef I2C_IOP3XX_H
#define I2C_IOP3XX_H 1
/*
* iop321 hardware bit definitions
*/
#define IOP3XX_ICR_FAST_MODE 0 x8000 /* 1=400kBps, 0=100kBps */
#define IOP3XX_ICR_UNIT_RESET 0 x4000 /* 1=RESET */
#define IOP3XX_ICR_SAD_IE 0 x2000 /* 1=Slave Detect Interrupt Enable */
#define IOP3XX_ICR_ALD_IE 0 x1000 /* 1=Arb Loss Detect Interrupt Enable */
#define IOP3XX_ICR_SSD_IE 0 x0800 /* 1=Slave STOP Detect Interrupt Enable */
#define IOP3XX_ICR_BERR_IE 0 x0400 /* 1=Bus Error Interrupt Enable */
#define IOP3XX_ICR_RXFULL_IE 0 x0200 /* 1=Receive Full Interrupt Enable */
#define IOP3XX_ICR_TXEMPTY_IE 0 x0100 /* 1=Transmit Empty Interrupt Enable */
#define IOP3XX_ICR_GCD 0 x0080 /* 1=General Call Disable */
/*
* IOP3XX_ICR_GCD : 1 disables response as slave . " This bit must be set
* when sending a master mode general call message from the I2C unit "
*/
#define IOP3XX_ICR_UE 0 x0040 /* 1=Unit Enable */
/*
* " NOTE : To avoid I2C bus integrity problems ,
* the user needs to ensure that the GPIO Output Data Register -
* GPOD bits associated with an I2C port are cleared prior to setting
* the enable bit for that I2C serial port .
* The user prepares to enable I2C port 0 and
* I2C port 1 by clearing GPOD bits 7 : 6 and GPOD bits 5 : 4 , respectively .
*/
#define IOP3XX_ICR_SCLEN 0 x0020 /* 1=SCL enable for master mode */
#define IOP3XX_ICR_MABORT 0 x0010 /* 1=Send a STOP with no data
* NB TBYTE must be clear */
#define IOP3XX_ICR_TBYTE 0 x0008 /* 1=Send/Receive a byte. i2c clears */
#define IOP3XX_ICR_NACK 0 x0004 /* 1=reply with NACK */
#define IOP3XX_ICR_MSTOP 0 x0002 /* 1=send a STOP after next data byte */
#define IOP3XX_ICR_MSTART 0 x0001 /* 1=initiate a START */
#define IOP3XX_ISR_BERRD 0 x0400 /* 1=BUS ERROR Detected */
#define IOP3XX_ISR_SAD 0 x0200 /* 1=Slave ADdress Detected */
#define IOP3XX_ISR_GCAD 0 x0100 /* 1=General Call Address Detected */
#define IOP3XX_ISR_RXFULL 0 x0080 /* 1=Receive Full */
#define IOP3XX_ISR_TXEMPTY 0 x0040 /* 1=Transmit Empty */
#define IOP3XX_ISR_ALD 0 x0020 /* 1=Arbitration Loss Detected */
#define IOP3XX_ISR_SSD 0 x0010 /* 1=Slave STOP Detected */
#define IOP3XX_ISR_BBUSY 0 x0008 /* 1=Bus BUSY */
#define IOP3XX_ISR_UNITBUSY 0 x0004 /* 1=Unit Busy */
#define IOP3XX_ISR_NACK 0 x0002 /* 1=Unit Rx or Tx a NACK */
#define IOP3XX_ISR_RXREAD 0 x0001 /* 1=READ 0=WRITE (R/W bit of slave addr */
#define IOP3XX_ISR_CLEARBITS 0 x07f0
#define IOP3XX_ISAR_SAMASK 0 x007f
#define IOP3XX_IDBR_MASK 0 x00ff
#define IOP3XX_IBMR_SCL 0 x0002
#define IOP3XX_IBMR_SDA 0 x0001
#define IOP3XX_GPOD_I2C0 0 x00c0 /* clear these bits to enable ch0 */
#define IOP3XX_GPOD_I2C1 0 x0030 /* clear these bits to enable ch1 */
#define MYSAR 0 /* default slave address */
#define I2C_ERR 321
#define I2C_ERR_BERR (I2C_ERR+0 )
#define I2C_ERR_ALD (I2C_ERR+1 )
#define CR_OFFSET 0
#define SR_OFFSET 0 x4
#define SAR_OFFSET 0 x8
#define DBR_OFFSET 0 xc
#define CCR_OFFSET 0 x10
#define BMR_OFFSET 0 x14
#define IOP3XX_I2C_IO_SIZE 0 x18
struct i2c_algo_iop3xx_data {
void __iomem *ioaddr;
wait_queue_head_t waitq;
spinlock_t lock;
u32 SR_enabled, SR_received;
int id;
struct gpio_desc *gpio_scl;
struct gpio_desc *gpio_sda;
};
#endif /* I2C_IOP3XX_H */
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