1 /* 2 * (C) Copyright 2011 3 * Marvell Inc, <www.marvell.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef _MV_I2C_H_ 9 #define _MV_I2C_H_ 10 extern void i2c_clk_enable(void); 11 12 /* Shall the current transfer have a start/stop condition? */ 13 #define I2C_COND_NORMAL 0 14 #define I2C_COND_START 1 15 #define I2C_COND_STOP 2 16 17 /* Shall the current transfer be ack/nacked or being waited for it? */ 18 #define I2C_ACKNAK_WAITACK 1 19 #define I2C_ACKNAK_SENDACK 2 20 #define I2C_ACKNAK_SENDNAK 4 21 22 /* Specify who shall transfer the data (master or slave) */ 23 #define I2C_READ 0 24 #define I2C_WRITE 1 25 26 #if (CONFIG_SYS_I2C_SPEED == 400000) 27 #define I2C_ICR_INIT (ICR_FM | ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD \ 28 | ICR_SCLE) 29 #else 30 #define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE) 31 #endif 32 33 #define I2C_ISR_INIT 0x7FF 34 /* ----- Control register bits ---------------------------------------- */ 35 36 #define ICR_START 0x1 /* start bit */ 37 #define ICR_STOP 0x2 /* stop bit */ 38 #define ICR_ACKNAK 0x4 /* send ACK(0) or NAK(1) */ 39 #define ICR_TB 0x8 /* transfer byte bit */ 40 #define ICR_MA 0x10 /* master abort */ 41 #define ICR_SCLE 0x20 /* master clock enable, mona SCLEA */ 42 #define ICR_IUE 0x40 /* unit enable */ 43 #define ICR_GCD 0x80 /* general call disable */ 44 #define ICR_ITEIE 0x100 /* enable tx interrupts */ 45 #define ICR_IRFIE 0x200 /* enable rx interrupts, mona: DRFIE */ 46 #define ICR_BEIE 0x400 /* enable bus error ints */ 47 #define ICR_SSDIE 0x800 /* slave STOP detected int enable */ 48 #define ICR_ALDIE 0x1000 /* enable arbitration interrupt */ 49 #define ICR_SADIE 0x2000 /* slave address detected int enable */ 50 #define ICR_UR 0x4000 /* unit reset */ 51 #define ICR_FM 0x8000 /* Fast Mode */ 52 53 /* ----- Status register bits ----------------------------------------- */ 54 55 #define ISR_RWM 0x1 /* read/write mode */ 56 #define ISR_ACKNAK 0x2 /* ack/nak status */ 57 #define ISR_UB 0x4 /* unit busy */ 58 #define ISR_IBB 0x8 /* bus busy */ 59 #define ISR_SSD 0x10 /* slave stop detected */ 60 #define ISR_ALD 0x20 /* arbitration loss detected */ 61 #define ISR_ITE 0x40 /* tx buffer empty */ 62 #define ISR_IRF 0x80 /* rx buffer full */ 63 #define ISR_GCAD 0x100 /* general call address detected */ 64 #define ISR_SAD 0x200 /* slave address detected */ 65 #define ISR_BED 0x400 /* bus error no ACK/NAK */ 66 67 #endif 68