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