drivers/i2c/ast_i2c.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (C) 2012-2020  ASPEED Technology Inc.
   4  * Copyright 2016 IBM Corporation
   5  * Copyright 2017 Google, Inc.
   6  */
   7 #ifndef __AST_I2C_H_
   8 #define __AST_I2C_H_
   9
  10 struct ast_i2c_regs {
  11         u32 fcr;
  12         u32 cactcr1;
  13         u32 cactcr2;
  14         u32 icr;
  15         u32 isr;
  16         u32 csr;
  17         u32 sdar;
  18         u32 pbcr;
  19         u32 trbbr;
  20 #ifdef CONFIG_ASPEED_AST2500
  21         u32 dma_mbar;
  22         u32 dma_tlr;
  23 #endif
  24 };
  25
  26 /* Device Register Definition */
  27 /* 0x00 : I2CD Function Control Register  */
  28 #define I2CD_BUFF_SEL_MASK                              (0x7 << 20)
  29 #define I2CD_BUFF_SEL(x)                                (x << 20)
  30 #define I2CD_M_SDA_LOCK_EN                      (0x1 << 16)
  31 #define I2CD_MULTI_MASTER_DIS                   (0x1 << 15)
  32 #define I2CD_M_SCL_DRIVE_EN             (0x1 << 14)
  33 #define I2CD_MSB_STS                                    (0x1 << 9)
  34 #define I2CD_SDA_DRIVE_1T_EN                    (0x1 << 8)
  35 #define I2CD_M_SDA_DRIVE_1T_EN          (0x1 << 7)
  36 #define I2CD_M_HIGH_SPEED_EN            (0x1 << 6)
  37 #define I2CD_DEF_ADDR_EN                                (0x1 << 5)
  38 #define I2CD_DEF_ALERT_EN                               (0x1 << 4)
  39 #define I2CD_DEF_ARP_EN                                 (0x1 << 3)
  40 #define I2CD_DEF_GCALL_EN                               (0x1 << 2)
  41 #define I2CD_SLAVE_EN                                   (0x1 << 1)
  42 #define I2CD_MASTER_EN                                  (0x1)
  43
  44 /* 0x04 : I2CD Clock and AC Timing Control Register #1 */
  45 /* Base register value. These bits are always set by the driver. */
  46 #define I2CD_CACTC_BASE                 0xfff00300
  47 #define I2CD_TCKHIGH_SHIFT                      16
  48 #define I2CD_TCKLOW_SHIFT                       12
  49 #define I2CD_THDDAT_SHIFT                       10
  50 #define I2CD_TO_DIV_SHIFT                       8
  51 #define I2CD_BASE_DIV_SHIFT                     0
  52
  53 /* 0x08 : I2CD Clock and AC Timing Control Register #2 */
  54 #define I2CD_tTIMEOUT                                   1
  55 #define I2CD_NO_TIMEOUT_CTRL                    0
  56
  57 /* 0x0c : I2CD Interrupt Control Register &
  58  * 0x10 : I2CD Interrupt Status Register
  59  *
  60  * These share bit definitions, so use the same values for the enable &
  61  * status bits.
  62  */
  63 #define I2CD_INTR_SDA_DL_TIMEOUT                        (0x1 << 14)
  64 #define I2CD_INTR_BUS_RECOVER_DONE                      (0x1 << 13)
  65 #define I2CD_INTR_SMBUS_ALERT                   (0x1 << 12)
  66 #define I2CD_INTR_SMBUS_ARP_ADDR                        (0x1 << 11)
  67 #define I2CD_INTR_SMBUS_DEV_ALERT_ADDR          (0x1 << 10)
  68 #define I2CD_INTR_SMBUS_DEF_ADDR                        (0x1 << 9)
  69 #define I2CD_INTR_GCALL_ADDR                    (0x1 << 8)
  70 #define I2CD_INTR_SLAVE_MATCH                   (0x1 << 7)
  71 #define I2CD_INTR_SCL_TIMEOUT                   (0x1 << 6)
  72 #define I2CD_INTR_ABNORMAL                              (0x1 << 5)
  73 #define I2CD_INTR_NORMAL_STOP                   (0x1 << 4)
  74 #define I2CD_INTR_ARBIT_LOSS                    (0x1 << 3)
  75 #define I2CD_INTR_RX_DONE                               (0x1 << 2)
  76 #define I2CD_INTR_TX_NAK                                (0x1 << 1)
  77 #define I2CD_INTR_TX_ACK                                (0x1 << 0)
  78
  79 /* 0x14 : I2CD Command/Status Register   */
  80 #define I2CD_SDA_OE                                     (0x1 << 28)
  81 #define I2CD_SDA_O                                      (0x1 << 27)
  82 #define I2CD_SCL_OE                                     (0x1 << 26)
  83 #define I2CD_SCL_O                                      (0x1 << 25)
  84 #define I2CD_TX_TIMING                          (0x1 << 24)
  85 #define I2CD_TX_STATUS                          (0x1 << 23)
  86
  87 /* Tx State Machine */
  88 #define I2CD_IDLE                                       0x0
  89 #define I2CD_MACTIVE                            0x8
  90 #define I2CD_MSTART                                     0x9
  91 #define I2CD_MSTARTR                            0xa
  92 #define I2CD_MSTOP                                      0xb
  93 #define I2CD_MTXD                                       0xc
  94 #define I2CD_MRXACK                                     0xd
  95 #define I2CD_MRXD                                       0xe
  96 #define I2CD_MTXACK                             0xf
  97 #define I2CD_SWAIT                                      0x1
  98 #define I2CD_SRXD                                       0x4
  99 #define I2CD_STXACK                             0x5
 100 #define I2CD_STXD                                       0x6
 101 #define I2CD_SRXACK                             0x7
 102 #define I2CD_RECOVER                            0x3
 103
 104 #define I2CD_SCL_LINE_STS                               (0x1 << 18)
 105 #define I2CD_SDA_LINE_STS                               (0x1 << 17)
 106 #define I2CD_BUS_BUSY_STS                               (0x1 << 16)
 107 #define I2CD_SDA_OE_OUT_DIR                             (0x1 << 15)
 108 #define I2CD_SDA_O_OUT_DIR                              (0x1 << 14)
 109 #define I2CD_SCL_OE_OUT_DIR                             (0x1 << 13)
 110 #define I2CD_SCL_O_OUT_DIR                              (0x1 << 12)
 111 #define I2CD_BUS_RECOVER_CMD                    (0x1 << 11)
 112 #define I2CD_S_ALT_EN                           (0x1 << 10)
 113 #define I2CD_RX_DMA_ENABLE                              (0x1 << 9)
 114 #define I2CD_TX_DMA_ENABLE                              (0x1 << 8)
 115
 116 /* Command Bit */
 117 #define I2CD_RX_BUFF_ENABLE                             (0x1 << 7)
 118 #define I2CD_TX_BUFF_ENABLE                             (0x1 << 6)
 119 #define I2CD_M_STOP_CMD                                 (0x1 << 5)
 120 #define I2CD_M_S_RX_CMD_LAST                    (0x1 << 4)
 121 #define I2CD_M_RX_CMD                                   (0x1 << 3)
 122 #define I2CD_S_TX_CMD                                   (0x1 << 2)
 123 #define I2CD_M_TX_CMD                                   (0x1 << 1)
 124 #define I2CD_M_START_CMD                                0x1
 125
 126 #define I2CD_RX_DATA_SHIFT                      8
 127 #define I2CD_RX_DATA_MASK                       (0xff << I2CD_RX_DATA_SHIFT)
 128
 129 #define I2C_HIGHSPEED_RATE    400000
 130
 131 #endif                          /* __AST_I2C_H_ */