drivers/i2c/designware_i2c.h

   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_ */