1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2004-2014 4 * Texas Instruments, <www.ti.com> 5 * 6 * Some changes copyright (C) 2007 Sergey Kubushyn <ksi (at) koi8.net> 7 */ 8 #ifndef _DAVINCI_I2C_H_ 9 #define _DAVINCI_I2C_H_ 10 11 #define I2C_WRITE 0 12 #define I2C_READ 1 13 14 struct i2c_regs { 15 u32 i2c_oa; 16 u32 i2c_ie; 17 u32 i2c_stat; 18 u32 i2c_scll; 19 u32 i2c_sclh; 20 u32 i2c_cnt; 21 u32 i2c_drr; 22 u32 i2c_sa; 23 u32 i2c_dxr; 24 u32 i2c_con; 25 u32 i2c_iv; 26 u32 res_2c; 27 u32 i2c_psc; 28 }; 29 30 /* I2C masks */ 31 32 /* I2C Interrupt Enable Register (I2C_IE): */ 33 #define I2C_IE_SCD_IE (1 << 5) /* Stop condition detect interrupt enable */ 34 #define I2C_IE_XRDY_IE (1 << 4) /* Transmit data ready interrupt enable */ 35 #define I2C_IE_RRDY_IE (1 << 3) /* Receive data ready interrupt enable */ 36 #define I2C_IE_ARDY_IE (1 << 2) /* Register access ready interrupt enable */ 37 #define I2C_IE_NACK_IE (1 << 1) /* No acknowledgment interrupt enable */ 38 #define I2C_IE_AL_IE (1 << 0) /* Arbitration lost interrupt enable */ 39 40 /* I2C Status Register (I2C_STAT): */ 41 42 #define I2C_STAT_BB (1 << 12) /* Bus busy */ 43 #define I2C_STAT_ROVR (1 << 11) /* Receive overrun */ 44 #define I2C_STAT_XUDF (1 << 10) /* Transmit underflow */ 45 #define I2C_STAT_AAS (1 << 9) /* Address as slave */ 46 #define I2C_STAT_SCD (1 << 5) /* Stop condition detect */ 47 #define I2C_STAT_XRDY (1 << 4) /* Transmit data ready */ 48 #define I2C_STAT_RRDY (1 << 3) /* Receive data ready */ 49 #define I2C_STAT_ARDY (1 << 2) /* Register access ready */ 50 #define I2C_STAT_NACK (1 << 1) /* No acknowledgment interrupt enable */ 51 #define I2C_STAT_AL (1 << 0) /* Arbitration lost interrupt enable */ 52 53 /* I2C Interrupt Code Register (I2C_INTCODE): */ 54 55 #define I2C_INTCODE_MASK 7 56 #define I2C_INTCODE_NONE 0 57 #define I2C_INTCODE_AL 1 /* Arbitration lost */ 58 #define I2C_INTCODE_NAK 2 /* No acknowledgement/general call */ 59 #define I2C_INTCODE_ARDY 3 /* Register access ready */ 60 #define I2C_INTCODE_RRDY 4 /* Rcv data ready */ 61 #define I2C_INTCODE_XRDY 5 /* Xmit data ready */ 62 #define I2C_INTCODE_SCD 6 /* Stop condition detect */ 63 64 /* I2C Configuration Register (I2C_CON): */ 65 66 #define I2C_CON_EN (1 << 5) /* I2C module enable */ 67 #define I2C_CON_STB (1 << 4) /* Start byte mode (master mode only) */ 68 #define I2C_CON_MST (1 << 10) /* Master/slave mode */ 69 #define I2C_CON_TRX (1 << 9) /* Tx/Rx mode (master mode only) */ 70 #define I2C_CON_XA (1 << 8) /* Expand address */ 71 #define I2C_CON_STP (1 << 11) /* Stop condition (master mode only) */ 72 #define I2C_CON_STT (1 << 13) /* Start condition (master mode only) */ 73 #define I2C_CON_FREE (1 << 14) /* Free run on emulation */ 74 75 #define I2C_TIMEOUT 0xffff0000 /* Timeout mask for poll_i2c_irq() */ 76 77 #endif 78
