/* * drivers/i2c/busses/i2c-sunxi.h * * Copyright (C) 2013 Allwinner. * Pan Nan * * SUNXI TWI Register Definition * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * 2013.5.3 Mintow * Adapt to all the new chip of Allwinner. Support sun8i/sun9i. */ #ifndef _SUNXI_I2C_H_ #define _SUNXI_I2C_H_ #include #define TWI_MODULE_NUM (5) #define AUTOSUSPEND_TIMEOUT 5000 /* TWI Register Offset */ #define TWI_ADDR_REG (0x00) /* 31:8bit reserved,7-1bit for slave addr,0 bit for GCE */ #define TWI_XADDR_REG (0x04) /* 31:8bit reserved,7-0bit for second addr in 10bit addr */ #define TWI_DATA_REG (0x08) /* 31:8bit reserved, 7-0bit send or receive data byte */ #define TWI_CTL_REG (0x0C) /* INT_EN,BUS_EN,M_STA,INT_FLAG,A_ACK */ #define TWI_STAT_REG (0x10) /* 28 interrupt types + 0xF8 normal type = 29 */ #define TWI_CLK_REG (0x14) /* 31:7bit reserved,6-3bit,CLK_M,2-0bit CLK_N */ #define TWI_SRST_REG (0x18) /* 31:1bit reserved;0bit,write 1 to clear 0. */ #define TWI_EFR_REG (0x1C) /* 31:2bit reserved,1:0 bit data byte follow read command */ #define TWI_LCR_REG (0x20) /* 31:6bits reserved 5:0bit for sda&scl control*/ #define TWI_DVFS_REG (0x24) /* 31:3bits reserved 2:0bit for dvfs control. only A10 support. */ /* TWI address register */ /* general call address enable for slave mode */ #define TWI_GCE_EN (0x1<<0) #define TWI_ADDR_MASK (0x7f<<1) /* 7:1bits */ /* 31:8bits reserved */ /* TWI extend address register */ /* 7:0bits for extend slave address */ #define TWI_XADDR_MASK (0xff) /* 31:8bits reserved */ /* TWI Data register default is 0x0000_0000 */ /* 7:0bits for send or received */ #define TWI_DATA_MASK (0xff) /* TWI Control Register Bit Fields & Masks, default value: 0x0000_0000*/ /* 1:0 bits reserved */ /* set 1 to send A_ACK,then low level on SDA */ #define TWI_CTL_ACK (0x1<<2) /* INT_FLAG,interrupt status flag: set '1' when interrupt coming */ #define TWI_CTL_INTFLG (0x1<<3) #define TWI_CTL_STP (0x1<<4) /* M_STP,Automatic clear 0 */ #define TWI_CTL_STA (0x1<<5) /* M_STA,atutomatic clear 0 */ /* BUS_EN, master mode should be set 1.*/ #define TWI_CTL_BUSEN (0x1<<6) #define TWI_CTL_INTEN (0x1<<7) /* INT_EN */ /* 31:8 bit reserved */ /* TWI Clock Register Bit Fields & Masks,default value:0x0000_0000 */ /* * Fin is APB CLOCK INPUT; * Fsample = F0 = Fin/2^CLK_N; * F1 = F0/(CLK_M+1); * * Foscl = F1/10 = Fin/(2^CLK_N * (CLK_M+1)*10); * Foscl is clock SCL;standard mode:100KHz or fast mode:400KHz */ #define TWI_CLK_DIV_M (0xF<<3) /* 6:3bit */ #define TWI_CLK_DIV_N (0x7<<0) /* 2:0bit */ /* TWI Soft Reset Register Bit Fields & Masks */ /* write 1 to clear 0, when complete soft reset clear 0 */ #define TWI_SRST_SRST (0x1<<0) /* TWI Enhance Feature Register Bit Fields & Masks */ /* default -- 0x0 */ /* 00:no,01: 1byte, 10:2 bytes, 11: 3bytes */ #define TWI_EFR_MASK (0x3<<0) #define TWI_EFR_WARC_0 (0x0<<0) #define TWI_EFR_WARC_1 (0x1<<0) #define TWI_EFR_WARC_2 (0x2<<0) #define TWI_EFR_WARC_3 (0x3<<0) /* twi line control register -default value: 0x0000_003a */ /* SDA line state control enable ,1:enable;0:disable */ #define TWI_LCR_SDA_EN (0x01<<0) /* SDA line state control bit, 1:high level;0:low level */ #define TWI_LCR_SDA_CTL (0x01<<1) /* SCL line state control enable ,1:enable;0:disable */ #define TWI_LCR_SCL_EN (0x01<<2) /* SCL line state control bit, 1:high level;0:low level */ #define TWI_LCR_SCL_CTL (0x01<<3) /* current state of SDA,readonly bit */ #define TWI_LCR_SDA_STATE_MASK (0x01<<4) /* current state of SCL,readonly bit */ #define TWI_LCR_SCL_STATE_MASK (0x01<<5) /* 31:6bits reserved */ #define TWI_LCR_IDLE_STATUS (0x3a) #define TWI_LCR_NORM_STATUS (0x30) /* normal status */ /* TWI Status Register Bit Fields & Masks */ #define TWI_STAT_MASK (0xff) /* 7:0 bits use only,default is 0xF8 */ #define TWI_STAT_BUS_ERR (0x00) /* BUS ERROR */ /* Master mode use only */ #define TWI_STAT_TX_STA (0x08) /* START condition transmitted */ /* Repeated START condition transmitted */ #define TWI_STAT_TX_RESTA (0x10) /* Address+Write bit transmitted, ACK received */ #define TWI_STAT_TX_AW_ACK (0x18) /* Address+Write bit transmitted, ACK not received */ #define TWI_STAT_TX_AW_NAK (0x20) /* data byte transmitted in master mode,ack received */ #define TWI_STAT_TXD_ACK (0x28) /* data byte transmitted in master mode ,ack not received */ #define TWI_STAT_TXD_NAK (0x30) /* arbitration lost in address or data byte */ #define TWI_STAT_ARBLOST (0x38) /* Address+Read bit transmitted, ACK received */ #define TWI_STAT_TX_AR_ACK (0x40) /* Address+Read bit transmitted, ACK not received */ #define TWI_STAT_TX_AR_NAK (0x48) /* data byte received in master mode ,ack transmitted */ #define TWI_STAT_RXD_ACK (0x50) /* date byte received in master mode,not ack transmitted */ #define TWI_STAT_RXD_NAK (0x58) /* Slave mode use only */ /* Slave address+Write bit received, ACK transmitted */ #define TWI_STAT_RXWS_ACK (0x60) #define TWI_STAT_ARBLOST_RXWS_ACK (0x68) /* General Call address received, ACK transmitted */ #define TWI_STAT_RXGCAS_ACK (0x70) #define TWI_STAT_ARBLOST_RXGCAS_ACK (0x78) #define TWI_STAT_RXDS_ACK (0x80) #define TWI_STAT_RXDS_NAK (0x88) #define TWI_STAT_RXDGCAS_ACK (0x90) #define TWI_STAT_RXDGCAS_NAK (0x98) #define TWI_STAT_RXSTPS_RXRESTAS (0xA0) #define TWI_STAT_RXRS_ACK (0xA8) #define TWI_STAT_ARBLOST_SLAR_ACK (0xB0) /* 10bit Address, second part of address */ /* Second Address byte+Write bit transmitted,ACK received */ #define TWI_STAT_TX_SAW_ACK (0xD0) /* Second Address byte+Write bit transmitted,ACK not received */ #define TWI_STAT_TX_SAW_NAK (0xD8) /* No relevant status information,INT_FLAG = 0 */ #define TWI_STAT_IDLE (0xF8) /* status or interrupt source */ /* * ------------------------------------------------------------------- * Code Status * 00h Bus error * 08h START condition transmitted * 10h Repeated START condition transmitted * 18h Address + Write bit transmitted, ACK received * 20h Address + Write bit transmitted, ACK not received * 28h Data byte transmitted in master mode, ACK received * 30h Data byte transmitted in master mode, ACK not received * 38h Arbitration lost in address or data byte * 40h Address + Read bit transmitted, ACK received * 48h Address + Read bit transmitted, ACK not received * 50h Data byte received in master mode, ACK transmitted * 58h Data byte received in master mode, not ACK transmitted * 60h Slave address + Write bit received, ACK transmitted * 68h Arbitration lost in address as master, * slave address + Write bit received, ACK transmitted * 70h General Call address received, ACK transmitted * 78h Arbitration lost in address as master, * General Call address received, ACK transmitted * 80h Data byte received after slave address received, ACK transmitted * 88h Data byte received after slave address received, not ACK transmitted * 90h Data byte received after General Call received, ACK transmitted * 98h Data byte received after General Call received, not ACK transmitted * A0h STOP or repeated START condition received in slave mode * A8h Slave address + Read bit received, ACK transmitted * B0h Arbitration lost in address as master, * slave address + Read bit received, ACK transmitted * B8h Data byte transmitted in slave mode, ACK received * C0h Data byte transmitted in slave mode, ACK not received * C8h Last byte transmitted in slave mode, ACK received * D0h Second Address byte + Write bit transmitted, ACK received * D8h Second Address byte + Write bit transmitted, ACK not received * F8h No relevant status information or no interrupt *-------------------------------------------------------------------------- */ /* TWI mode select */ #define TWI_MASTER_MODE (1) #define TWI_SLAVE_MODE (0) /* seldom use */ /* The global infor of TWI channel. */ #define SUNXI_TWI_DEV_NAME "twi" #define SUNXI_TWI_CHAN_MASK(ch) (1<