projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 7f5ea250 AL |
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_ */ |