designware_i2c.h
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/*
* (C) Copyright 2009
* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __DW_I2C_H_
#define __DW_I2C_H_
struct i2c_regs {
u32 ic_con; /* 0x00 */
u32 ic_tar; /* 0x04 */
u32 ic_sar; /* 0x08 */
u32 ic_hs_maddr; /* 0x0c */
u32 ic_cmd_data; /* 0x10 */
u32 ic_ss_scl_hcnt; /* 0x14 */
u32 ic_ss_scl_lcnt; /* 0x18 */
u32 ic_fs_scl_hcnt; /* 0x1c */
u32 ic_fs_scl_lcnt; /* 0x20 */
u32 ic_hs_scl_hcnt; /* 0x24 */
u32 ic_hs_scl_lcnt; /* 0x28 */
u32 ic_intr_stat; /* 0x2c */
u32 ic_intr_mask; /* 0x30 */
u32 ic_raw_intr_stat; /* 0x34 */
u32 ic_rx_tl; /* 0x38 */
u32 ic_tx_tl; /* 0x3c */
u32 ic_clr_intr; /* 0x40 */
u32 ic_clr_rx_under; /* 0x44 */
u32 ic_clr_rx_over; /* 0x48 */
u32 ic_clr_tx_over; /* 0x4c */
u32 ic_clr_rd_req; /* 0x50 */
u32 ic_clr_tx_abrt; /* 0x54 */
u32 ic_clr_rx_done; /* 0x58 */
u32 ic_clr_activity; /* 0x5c */
u32 ic_clr_stop_det; /* 0x60 */
u32 ic_clr_start_det; /* 0x64 */
u32 ic_clr_gen_call; /* 0x68 */
u32 ic_enable; /* 0x6c */
u32 ic_status; /* 0x70 */
u32 ic_txflr; /* 0x74 */
u32 ic_rxflr; /* 0x78 */
u32 ic_sda_hold; /* 0x7c */
u32 ic_tx_abrt_source; /* 0x80 */
u8 res1[0x18]; /* 0x84 */
u32 ic_enable_status; /* 0x9c */
};
#if !defined(IC_CLK)
#define IC_CLK 166
#endif
#define NANO_TO_MICRO 1000
/* High and low times in different speed modes (in ns) */
#define MIN_SS_SCL_HIGHTIME 4000
#define MIN_SS_SCL_LOWTIME 4700
#define MIN_FS_SCL_HIGHTIME 600
#define MIN_FS_SCL_LOWTIME 1300
#define MIN_HS_SCL_HIGHTIME 60
#define MIN_HS_SCL_LOWTIME 160
/* Worst case timeout for 1 byte is kept as 2ms */
#define I2C_BYTE_TO (CONFIG_SYS_HZ/500)
#define I2C_STOPDET_TO (CONFIG_SYS_HZ/500)
#define I2C_BYTE_TO_BB (I2C_BYTE_TO * 16)
/* i2c control register definitions */
#define IC_CON_SD 0x0040
#define IC_CON_RE 0x0020
#define IC_CON_10BITADDRMASTER 0x0010
#define IC_CON_10BITADDR_SLAVE 0x0008
#define IC_CON_SPD_MSK 0x0006
#define IC_CON_SPD_SS 0x0002
#define IC_CON_SPD_FS 0x0004
#define IC_CON_SPD_HS 0x0006
#define IC_CON_MM 0x0001
/* i2c target address register definitions */
#define TAR_ADDR 0x0050
/* i2c slave address register definitions */
#define IC_SLAVE_ADDR 0x0002
/* i2c data buffer and command register definitions */
#define IC_CMD 0x0100
#define IC_STOP 0x0200
/* i2c interrupt status register definitions */
#define IC_GEN_CALL 0x0800
#define IC_START_DET 0x0400
#define IC_STOP_DET 0x0200
#define IC_ACTIVITY 0x0100
#define IC_RX_DONE 0x0080
#define IC_TX_ABRT 0x0040
#define IC_RD_REQ 0x0020
#define IC_TX_EMPTY 0x0010
#define IC_TX_OVER 0x0008
#define IC_RX_FULL 0x0004
#define IC_RX_OVER 0x0002
#define IC_RX_UNDER 0x0001
/* fifo threshold register definitions */
#define IC_TL0 0x00
#define IC_TL1 0x01
#define IC_TL2 0x02
#define IC_TL3 0x03
#define IC_TL4 0x04
#define IC_TL5 0x05
#define IC_TL6 0x06
#define IC_TL7 0x07
#define IC_RX_TL IC_TL0
#define IC_TX_TL IC_TL0
/* i2c enable register definitions */
#define IC_ENABLE_0B 0x0001
/* i2c status register definitions */
#define IC_STATUS_SA 0x0040
#define IC_STATUS_MA 0x0020
#define IC_STATUS_RFF 0x0010
#define IC_STATUS_RFNE 0x0008
#define IC_STATUS_TFE 0x0004
#define IC_STATUS_TFNF 0x0002
#define IC_STATUS_ACT 0x0001
/* Speed Selection */
#define IC_SPEED_MODE_STANDARD 1
#define IC_SPEED_MODE_FAST 2
#define IC_SPEED_MODE_MAX 3
#define I2C_MAX_SPEED 3400000
#define I2C_FAST_SPEED 400000
#define I2C_STANDARD_SPEED 100000
#endif /* __DW_I2C_H_ */