ast_i2c.h
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/*
* Copyright (C) 2012-2020 ASPEED Technology Inc.
* Copyright 2016 IBM Corporation
* Copyright 2017 Google, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __AST_I2C_H_
#define __AST_I2C_H_
struct ast_i2c_regs {
u32 fcr;
u32 cactcr1;
u32 cactcr2;
u32 icr;
u32 isr;
u32 csr;
u32 sdar;
u32 pbcr;
u32 trbbr;
#ifdef CONFIG_ASPEED_AST2500
u32 dma_mbar;
u32 dma_tlr;
#endif
};
/* Device Register Definition */
/* 0x00 : I2CD Function Control Register */
#define I2CD_BUFF_SEL_MASK (0x7 << 20)
#define I2CD_BUFF_SEL(x) (x << 20)
#define I2CD_M_SDA_LOCK_EN (0x1 << 16)
#define I2CD_MULTI_MASTER_DIS (0x1 << 15)
#define I2CD_M_SCL_DRIVE_EN (0x1 << 14)
#define I2CD_MSB_STS (0x1 << 9)
#define I2CD_SDA_DRIVE_1T_EN (0x1 << 8)
#define I2CD_M_SDA_DRIVE_1T_EN (0x1 << 7)
#define I2CD_M_HIGH_SPEED_EN (0x1 << 6)
#define I2CD_DEF_ADDR_EN (0x1 << 5)
#define I2CD_DEF_ALERT_EN (0x1 << 4)
#define I2CD_DEF_ARP_EN (0x1 << 3)
#define I2CD_DEF_GCALL_EN (0x1 << 2)
#define I2CD_SLAVE_EN (0x1 << 1)
#define I2CD_MASTER_EN (0x1)
/* 0x04 : I2CD Clock and AC Timing Control Register #1 */
/* Base register value. These bits are always set by the driver. */
#define I2CD_CACTC_BASE 0xfff00300
#define I2CD_TCKHIGH_SHIFT 16
#define I2CD_TCKLOW_SHIFT 12
#define I2CD_THDDAT_SHIFT 10
#define I2CD_TO_DIV_SHIFT 8
#define I2CD_BASE_DIV_SHIFT 0
/* 0x08 : I2CD Clock and AC Timing Control Register #2 */
#define I2CD_tTIMEOUT 1
#define I2CD_NO_TIMEOUT_CTRL 0
/* 0x0c : I2CD Interrupt Control Register &
* 0x10 : I2CD Interrupt Status Register
*
* These share bit definitions, so use the same values for the enable &
* status bits.
*/
#define I2CD_INTR_SDA_DL_TIMEOUT (0x1 << 14)
#define I2CD_INTR_BUS_RECOVER_DONE (0x1 << 13)
#define I2CD_INTR_SMBUS_ALERT (0x1 << 12)
#define I2CD_INTR_SMBUS_ARP_ADDR (0x1 << 11)
#define I2CD_INTR_SMBUS_DEV_ALERT_ADDR (0x1 << 10)
#define I2CD_INTR_SMBUS_DEF_ADDR (0x1 << 9)
#define I2CD_INTR_GCALL_ADDR (0x1 << 8)
#define I2CD_INTR_SLAVE_MATCH (0x1 << 7)
#define I2CD_INTR_SCL_TIMEOUT (0x1 << 6)
#define I2CD_INTR_ABNORMAL (0x1 << 5)
#define I2CD_INTR_NORMAL_STOP (0x1 << 4)
#define I2CD_INTR_ARBIT_LOSS (0x1 << 3)
#define I2CD_INTR_RX_DONE (0x1 << 2)
#define I2CD_INTR_TX_NAK (0x1 << 1)
#define I2CD_INTR_TX_ACK (0x1 << 0)
/* 0x14 : I2CD Command/Status Register */
#define I2CD_SDA_OE (0x1 << 28)
#define I2CD_SDA_O (0x1 << 27)
#define I2CD_SCL_OE (0x1 << 26)
#define I2CD_SCL_O (0x1 << 25)
#define I2CD_TX_TIMING (0x1 << 24)
#define I2CD_TX_STATUS (0x1 << 23)
/* Tx State Machine */
#define I2CD_IDLE 0x0
#define I2CD_MACTIVE 0x8
#define I2CD_MSTART 0x9
#define I2CD_MSTARTR 0xa
#define I2CD_MSTOP 0xb
#define I2CD_MTXD 0xc
#define I2CD_MRXACK 0xd
#define I2CD_MRXD 0xe
#define I2CD_MTXACK 0xf
#define I2CD_SWAIT 0x1
#define I2CD_SRXD 0x4
#define I2CD_STXACK 0x5
#define I2CD_STXD 0x6
#define I2CD_SRXACK 0x7
#define I2CD_RECOVER 0x3
#define I2CD_SCL_LINE_STS (0x1 << 18)
#define I2CD_SDA_LINE_STS (0x1 << 17)
#define I2CD_BUS_BUSY_STS (0x1 << 16)
#define I2CD_SDA_OE_OUT_DIR (0x1 << 15)
#define I2CD_SDA_O_OUT_DIR (0x1 << 14)
#define I2CD_SCL_OE_OUT_DIR (0x1 << 13)
#define I2CD_SCL_O_OUT_DIR (0x1 << 12)
#define I2CD_BUS_RECOVER_CMD (0x1 << 11)
#define I2CD_S_ALT_EN (0x1 << 10)
#define I2CD_RX_DMA_ENABLE (0x1 << 9)
#define I2CD_TX_DMA_ENABLE (0x1 << 8)
/* Command Bit */
#define I2CD_RX_BUFF_ENABLE (0x1 << 7)
#define I2CD_TX_BUFF_ENABLE (0x1 << 6)
#define I2CD_M_STOP_CMD (0x1 << 5)
#define I2CD_M_S_RX_CMD_LAST (0x1 << 4)
#define I2CD_M_RX_CMD (0x1 << 3)
#define I2CD_S_TX_CMD (0x1 << 2)
#define I2CD_M_TX_CMD (0x1 << 1)
#define I2CD_M_START_CMD 0x1
#define I2CD_RX_DATA_SHIFT 8
#define I2CD_RX_DATA_MASK (0xff << I2CD_RX_DATA_SHIFT)
#define I2C_HIGHSPEED_RATE 400000
#endif /* __AST_I2C_H_ */