LXR uboot/drivers/i2c/i2c-cortina.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * (C) Copyright 2019
   4 * Cortina Access, <www.cortina-access.com>
   5 */
   6
   7#ifndef __CA_I2C_H_
   8#define __CA_I2C_H_
   9
  10#include <linux/bitops.h>
  11#include <linux/delay.h>
  12
  13#if !defined(__ASSEMBLER__) && !defined(__ASSEMBLY__)
  14struct i2c_regs {
  15        u32 i2c_cfg;
  16        u32 i2c_ctrl;
  17        u32 i2c_txr;
  18        u32 i2c_rxr;
  19        u32 i2c_ack;
  20        u32 i2c_ie0;
  21        u32 i2c_int0;
  22        u32 i2c_ie1;
  23        u32 i2c_int1;
  24        u32 i2c_stat;
  25};
  26
  27union ca_biw_cfg {
  28        struct biw_cfg {
  29                u32 core_en             : 1;
  30                u32 biw_soft_reset      : 1;
  31                u32 busywait_en         : 1;
  32                u32 stretch_en          : 1;
  33                u32 arb_en              : 1;
  34                u32 clksync_en          : 1;
  35                u32 rsrvd1              : 2;
  36                u32 spike_cnt           : 4;
  37                u32 rsrvd2              : 4;
  38                u32 prer                : 16;
  39        } bf;
  40        unsigned int wrd;
  41};
  42
  43union ca_biw_ctrl {
  44        struct biw_ctrl {
  45                u32 biwdone     : 1;
  46                u32 rsrvd1      : 2;
  47                u32 ack_in      : 1;
  48                u32 write       : 1;
  49                u32 read        : 1;
  50                u32 stop        : 1;
  51                u32 start       : 1;
  52                u32 rsrvd2      : 24;
  53        } bf;
  54        unsigned int wrd;
  55};
  56
  57union ca_biw_ack {
  58        struct biw_ack {
  59                u32 al          :1;
  60                u32 biw_busy    :1;
  61                u32 ack_out     :1;
  62                u32 rsrvd1      :29;
  63        } bf;
  64        unsigned int wrd;
  65};
  66#endif /* !__ASSEMBLER__*/
  67
  68struct ca_i2c {
  69        struct i2c_regs *regs;
  70        unsigned int speed;
  71};
  72
  73#define I2C_CMD_WT                      0
  74#define I2C_CMD_RD                      1
  75
  76#define BIW_CTRL_DONE           BIT(0)
  77#define BIW_CTRL_ACK_IN         BIT(3)
  78#define BIW_CTRL_WRITE          BIT(4)
  79#define BIW_CTRL_READ           BIT(5)
  80#define BIW_CTRL_STOP           BIT(6)
  81#define BIW_CTRL_START          BIT(7)
  82
  83#define I2C_BYTE_TO             (CONFIG_SYS_HZ / 500)
  84#define I2C_STOPDET_TO          (CONFIG_SYS_HZ / 500)
  85#define I2C_BYTE_TO_BB          (10)
  86
  87#endif                                                  /* __CA_I2C_H_ */
  88