1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2009 4 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com. 5 */ 6 7 #ifndef __DW_I2C_H_ 8 #define __DW_I2C_H_ 9 10 struct i2c_regs { 11 u32 ic_con; /* 0x00 */ 12 u32 ic_tar; /* 0x04 */ 13 u32 ic_sar; /* 0x08 */ 14 u32 ic_hs_maddr; /* 0x0c */ 15 u32 ic_cmd_data; /* 0x10 */ 16 u32 ic_ss_scl_hcnt; /* 0x14 */ 17 u32 ic_ss_scl_lcnt; /* 0x18 */ 18 u32 ic_fs_scl_hcnt; /* 0x1c */ 19 u32 ic_fs_scl_lcnt; /* 0x20 */ 20 u32 ic_hs_scl_hcnt; /* 0x24 */ 21 u32 ic_hs_scl_lcnt; /* 0x28 */ 22 u32 ic_intr_stat; /* 0x2c */ 23 u32 ic_intr_mask; /* 0x30 */ 24 u32 ic_raw_intr_stat; /* 0x34 */ 25 u32 ic_rx_tl; /* 0x38 */ 26 u32 ic_tx_tl; /* 0x3c */ 27 u32 ic_clr_intr; /* 0x40 */ 28 u32 ic_clr_rx_under; /* 0x44 */ 29 u32 ic_clr_rx_over; /* 0x48 */ 30 u32 ic_clr_tx_over; /* 0x4c */ 31 u32 ic_clr_rd_req; /* 0x50 */ 32 u32 ic_clr_tx_abrt; /* 0x54 */ 33 u32 ic_clr_rx_done; /* 0x58 */ 34 u32 ic_clr_activity; /* 0x5c */ 35 u32 ic_clr_stop_det; /* 0x60 */ 36 u32 ic_clr_start_det; /* 0x64 */ 37 u32 ic_clr_gen_call; /* 0x68 */ 38 u32 ic_enable; /* 0x6c */ 39 u32 ic_status; /* 0x70 */ 40 u32 ic_txflr; /* 0x74 */ 41 u32 ic_rxflr; /* 0x78 */ 42 u32 ic_sda_hold; /* 0x7c */ 43 u32 ic_tx_abrt_source; /* 0x80 */ 44 u8 res1[0x18]; /* 0x84 */ 45 u32 ic_enable_status; /* 0x9c */ 46 }; 47 48 #if !defined(IC_CLK) 49 #define IC_CLK 166 50 #endif 51 #define NANO_TO_MICRO 1000 52 53 /* High and low times in different speed modes (in ns) */ 54 #define MIN_SS_SCL_HIGHTIME 4000 55 #define MIN_SS_SCL_LOWTIME 4700 56 #define MIN_FS_SCL_HIGHTIME 600 57 #define MIN_FS_SCL_LOWTIME 1300 58 #define MIN_HS_SCL_HIGHTIME 60 59 #define MIN_HS_SCL_LOWTIME 160 60 61 /* Worst case timeout for 1 byte is kept as 2ms */ 62 #define I2C_BYTE_TO (CONFIG_SYS_HZ/500) 63 #define I2C_STOPDET_TO (CONFIG_SYS_HZ/500) 64 #define I2C_BYTE_TO_BB (I2C_BYTE_TO * 16) 65 66 /* i2c control register definitions */ 67 #define IC_CON_SD 0x0040 68 #define IC_CON_RE 0x0020 69 #define IC_CON_10BITADDRMASTER 0x0010 70 #define IC_CON_10BITADDR_SLAVE 0x0008 71 #define IC_CON_SPD_MSK 0x0006 72 #define IC_CON_SPD_SS 0x0002 73 #define IC_CON_SPD_FS 0x0004 74 #define IC_CON_SPD_HS 0x0006 75 #define IC_CON_MM 0x0001 76 77 /* i2c target address register definitions */ 78 #define TAR_ADDR 0x0050 79 80 /* i2c slave address register definitions */ 81 #define IC_SLAVE_ADDR 0x0002 82 83 /* i2c data buffer and command register definitions */ 84 #define IC_CMD 0x0100 85 #define IC_STOP 0x0200 86 87 /* i2c interrupt status register definitions */ 88 #define IC_GEN_CALL 0x0800 89 #define IC_START_DET 0x0400 90 #define IC_STOP_DET 0x0200 91 #define IC_ACTIVITY 0x0100 92 #define IC_RX_DONE 0x0080 93 #define IC_TX_ABRT 0x0040 94 #define IC_RD_REQ 0x0020 95 #define IC_TX_EMPTY 0x0010 96 #define IC_TX_OVER 0x0008 97 #define IC_RX_FULL 0x0004 98 #define IC_RX_OVER 0x0002 99 #define IC_RX_UNDER 0x0001 100 101 /* fifo threshold register definitions */ 102 #define IC_TL0 0x00 103 #define IC_TL1 0x01 104 #define IC_TL2 0x02 105 #define IC_TL3 0x03 106 #define IC_TL4 0x04 107 #define IC_TL5 0x05 108 #define IC_TL6 0x06 109 #define IC_TL7 0x07 110 #define IC_RX_TL IC_TL0 111 #define IC_TX_TL IC_TL0 112 113 /* i2c enable register definitions */ 114 #define IC_ENABLE_0B 0x0001 115 116 /* i2c status register definitions */ 117 #define IC_STATUS_SA 0x0040 118 #define IC_STATUS_MA 0x0020 119 #define IC_STATUS_RFF 0x0010 120 #define IC_STATUS_RFNE 0x0008 121 #define IC_STATUS_TFE 0x0004 122 #define IC_STATUS_TFNF 0x0002 123 #define IC_STATUS_ACT 0x0001 124 125 /* Speed Selection */ 126 #define IC_SPEED_MODE_STANDARD 1 127 #define IC_SPEED_MODE_FAST 2 128 #define IC_SPEED_MODE_MAX 3 129 130 #define I2C_MAX_SPEED 3400000 131 #define I2C_FAST_SPEED 400000 132 #define I2C_STANDARD_SPEED 100000 133 134 #endif /* __DW_I2C_H_ */ 135