drivers/i2c/designware_i2c.h

   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
  11 struct 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_ */