| Arthur Li | fe661ba | 2020-06-01 12:56:31 -0700 | [diff] [blame] | 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__) |
| 14 | struct 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 | |
| 27 | union 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 | |
| 43 | union 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 | |
| 57 | union 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 | |
| 68 | struct 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_ */ |