1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright ASPEED Technology Inc.
5 #ifndef __AST2600_I2C_H_
6 #define __AST2600_I2C_H_
8 struct ast2600_i2c_regs {
18 /* 0x00 : I2CC Master/Slave Function Control Register */
19 #define I2CC_SLAVE_ADDR_RX_EN BIT(20)
20 #define I2CC_MASTER_RETRY_MASK GENMASK(19, 18)
21 #define I2CC_MASTER_RETRY(x) (((x) & GENMASK(1, 0)) << 18)
22 #define I2CC_BUS_AUTO_RELEASE BIT(17)
23 #define I2CC_M_SDA_LOCK_EN BIT(16)
24 #define I2CC_MULTI_MASTER_DIS BIT(15)
25 #define I2CC_M_SCL_DRIVE_EN BIT(14)
26 #define I2CC_MSB_STS BIT(9)
27 #define I2CC_SDA_DRIVE_1T_EN BIT(8)
28 #define I2CC_M_SDA_DRIVE_1T_EN BIT(7)
29 #define I2CC_M_HIGH_SPEED_EN BIT(6)
31 #define I2CC_SLAVE_EN BIT(1)
32 #define I2CC_MASTER_EN BIT(0)
34 /* 0x04 : I2CD Clock and AC Timing Control Register #1 */
35 /* Base register value. These bits are always set by the driver. */
36 #define I2CD_CACTC_BASE 0xfff00300
37 #define I2CD_TCKHIGH_SHIFT 16
38 #define I2CD_TCKLOW_SHIFT 12
39 #define I2CD_THDDAT_SHIFT 10
40 #define I2CD_TO_DIV_SHIFT 8
41 #define I2CD_BASE_DIV_SHIFT 0
43 /* 0x08 : I2CC Master/Slave Transmit/Receive Byte Buffer Register */
44 #define I2CC_TX_DIR_MASK GENMASK(31, 29)
45 #define I2CC_SDA_OE BIT(28)
46 #define I2CC_SDA_O BIT(27)
47 #define I2CC_SCL_OE BIT(26)
48 #define I2CC_SCL_O BIT(25)
50 #define I2CC_SCL_LINE_STS BIT(18)
51 #define I2CC_SDA_LINE_STS BIT(17)
52 #define I2CC_BUS_BUSY_STS BIT(16)
53 #define I2CC_GET_RX_BUFF(x) (((x) >> 8) & GENMASK(7, 0))
55 /* 0x10 : I2CM Master Interrupt Control Register */
56 /* 0x14 : I2CM Master Interrupt Status Register */
57 #define I2CM_PKT_TIMEOUT BIT(18)
58 #define I2CM_PKT_ERROR BIT(17)
59 #define I2CM_PKT_DONE BIT(16)
61 #define I2CM_BUS_RECOVER_FAIL BIT(15)
62 #define I2CM_SDA_DL_TO BIT(14)
63 #define I2CM_BUS_RECOVER BIT(13)
64 #define I2CM_SMBUS_ALT BIT(12)
66 #define I2CM_SCL_LOW_TO BIT(6)
67 #define I2CM_ABNORMAL BIT(5)
68 #define I2CM_NORMAL_STOP BIT(4)
69 #define I2CM_ARBIT_LOSS BIT(3)
70 #define I2CM_RX_DONE BIT(2)
71 #define I2CM_TX_NAK BIT(1)
72 #define I2CM_TX_ACK BIT(0)
74 /* 0x18 : I2CM Master Command/Status Register */
75 #define I2CM_PKT_ADDR(x) (((x) & GENMASK(6, 0)) << 24)
76 #define I2CM_PKT_EN BIT(16)
77 #define I2CM_SDA_OE_OUT_DIR BIT(15)
78 #define I2CM_SDA_O_OUT_DIR BIT(14)
79 #define I2CM_SCL_OE_OUT_DIR BIT(13)
80 #define I2CM_SCL_O_OUT_DIR BIT(12)
81 #define I2CM_RECOVER_CMD_EN BIT(11)
83 #define I2CM_RX_DMA_EN BIT(9)
84 #define I2CM_TX_DMA_EN BIT(8)
86 #define I2CM_RX_BUFF_EN BIT(7)
87 #define I2CM_TX_BUFF_EN BIT(6)
88 #define I2CM_STOP_CMD BIT(5)
89 #define I2CM_RX_CMD_LAST BIT(4)
90 #define I2CM_RX_CMD BIT(3)
92 #define I2CM_TX_CMD BIT(1)
93 #define I2CM_START_CMD BIT(0)
95 #define I2C_TIMEOUT_US 100000
97 /* I2C Global Register */
99 #define I2CG_SLAVE_ISR 0x04
100 #define I2CG_OWNER 0x08
101 #define I2CG_CTRL 0x0C
102 #define I2CG_CLK_DIV_CTRL 0x10
104 #define I2CG_SLAVE_PKT_NAK BIT(4)
105 #define I2CG_M_S_SEPARATE_INTR BIT(3)
106 #define I2CG_CTRL_NEW_REG BIT(2)
107 #define I2CG_CTRL_NEW_CLK_DIV BIT(1)
109 #define GLOBAL_INIT \
110 (I2CG_SLAVE_PKT_NAK | \
111 I2CG_CTRL_NEW_REG | \
112 I2CG_CTRL_NEW_CLK_DIV)
113 #define I2CCG_DIV_CTRL 0xc6411208
115 #define GET_CLK1_DIV(x) ((x) & 0xff)
116 #define GET_CLK2_DIV(x) (((x) >> 8) & 0xff)
117 #define GET_CLK3_DIV(x) (((x) >> 16) & 0xff)
118 #define GET_CLK4_DIV(x) (((x) >> 24) & 0xff)
120 #endif /* __AST2600_I2C_H_ */