1/* 2 * (C) Copyright 2009 3 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8#ifndef __DW_I2C_H_ 9#define __DW_I2C_H_ 10 11struct i2c_regs { 12 u32 ic_con; 13 u32 ic_tar; 14 u32 ic_sar; 15 u32 ic_hs_maddr; 16 u32 ic_cmd_data; 17 u32 ic_ss_scl_hcnt; 18 u32 ic_ss_scl_lcnt; 19 u32 ic_fs_scl_hcnt; 20 u32 ic_fs_scl_lcnt; 21 u32 ic_hs_scl_hcnt; 22 u32 ic_hs_scl_lcnt; 23 u32 ic_intr_stat; 24 u32 ic_intr_mask; 25 u32 ic_raw_intr_stat; 26 u32 ic_rx_tl; 27 u32 ic_tx_tl; 28 u32 ic_clr_intr; 29 u32 ic_clr_rx_under; 30 u32 ic_clr_rx_over; 31 u32 ic_clr_tx_over; 32 u32 ic_clr_rd_req; 33 u32 ic_clr_tx_abrt; 34 u32 ic_clr_rx_done; 35 u32 ic_clr_activity; 36 u32 ic_clr_stop_det; 37 u32 ic_clr_start_det; 38 u32 ic_clr_gen_call; 39 u32 ic_enable; 40 u32 ic_status; 41 u32 ic_txflr; 42 u32 ix_rxflr; 43 u32 reserved_1; 44 u32 ic_tx_abrt_source; 45}; 46 47#if !defined(IC_CLK) 48#define IC_CLK 166 49#endif 50#define NANO_TO_MICRO 1000 51 52/* High and low times in different speed modes (in ns) */ 53#define MIN_SS_SCL_HIGHTIME 4000 54#define MIN_SS_SCL_LOWTIME 4700 55#define MIN_FS_SCL_HIGHTIME 600 56#define MIN_FS_SCL_LOWTIME 1300 57#define MIN_HS_SCL_HIGHTIME 60 58#define MIN_HS_SCL_LOWTIME 160 59 60/* Worst case timeout for 1 byte is kept as 2ms */ 61#define I2C_BYTE_TO (CONFIG_SYS_HZ/500) 62#define I2C_STOPDET_TO (CONFIG_SYS_HZ/500) 63#define I2C_BYTE_TO_BB (I2C_BYTE_TO * 16) 64 65/* i2c control register definitions */ 66#define IC_CON_SD 0x0040 67#define IC_CON_RE 0x0020 68#define IC_CON_10BITADDRMASTER 0x0010 69#define IC_CON_10BITADDR_SLAVE 0x0008 70#define IC_CON_SPD_MSK 0x0006 71#define IC_CON_SPD_SS 0x0002 72#define IC_CON_SPD_FS 0x0004 73#define IC_CON_SPD_HS 0x0006 74#define IC_CON_MM 0x0001 75 76/* i2c target address register definitions */ 77#define TAR_ADDR 0x0050 78 79/* i2c slave address register definitions */ 80#define IC_SLAVE_ADDR 0x0002 81 82/* i2c data buffer and command register definitions */ 83#define IC_CMD 0x0100 84#define IC_STOP 0x0200 85 86/* i2c interrupt status register definitions */ 87#define IC_GEN_CALL 0x0800 88#define IC_START_DET 0x0400 89#define IC_STOP_DET 0x0200 90#define IC_ACTIVITY 0x0100 91#define IC_RX_DONE 0x0080 92#define IC_TX_ABRT 0x0040 93#define IC_RD_REQ 0x0020 94#define IC_TX_EMPTY 0x0010 95#define IC_TX_OVER 0x0008 96#define IC_RX_FULL 0x0004 97#define IC_RX_OVER 0x0002 98#define IC_RX_UNDER 0x0001 99 100/* fifo threshold register definitions */ 101#define IC_TL0 0x00 102#define IC_TL1 0x01 103#define IC_TL2 0x02 104#define IC_TL3 0x03 105#define IC_TL4 0x04 106#define IC_TL5 0x05 107#define IC_TL6 0x06 108#define IC_TL7 0x07 109#define IC_RX_TL IC_TL0 110#define IC_TX_TL IC_TL0 111 112/* i2c enable register definitions */ 113#define IC_ENABLE_0B 0x0001 114 115/* i2c status register definitions */ 116#define IC_STATUS_SA 0x0040 117#define IC_STATUS_MA 0x0020 118#define IC_STATUS_RFF 0x0010 119#define IC_STATUS_RFNE 0x0008 120#define IC_STATUS_TFE 0x0004 121#define IC_STATUS_TFNF 0x0002 122#define IC_STATUS_ACT 0x0001 123 124/* Speed Selection */ 125#define IC_SPEED_MODE_STANDARD 1 126#define IC_SPEED_MODE_FAST 2 127#define IC_SPEED_MODE_MAX 3 128 129#define I2C_MAX_SPEED 3400000 130#define I2C_FAST_SPEED 400000 131#define I2C_STANDARD_SPEED 100000 132 133#endif /* __DW_I2C_H_ */ 134