diff options
Diffstat (limited to 'drivers/i2c/ast2600_i2c.h')
| -rw-r--r-- | drivers/i2c/ast2600_i2c.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/i2c/ast2600_i2c.h b/drivers/i2c/ast2600_i2c.h new file mode 100644 index 0000000..69699ba --- /dev/null +++ b/drivers/i2c/ast2600_i2c.h @@ -0,0 +1,120 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright ASPEED Technology Inc. + */ +#ifndef __AST2600_I2C_H_ +#define __AST2600_I2C_H_ + +struct ast2600_i2c_regs { + u32 fun_ctrl; + u32 ac_timing; + u32 trx_buff; + u32 icr; + u32 ier; + u32 isr; + u32 cmd_sts; +}; + +/* 0x00 : I2CC Master/Slave Function Control Register */ +#define I2CC_SLAVE_ADDR_RX_EN BIT(20) +#define I2CC_MASTER_RETRY_MASK GENMASK(19, 18) +#define I2CC_MASTER_RETRY(x) (((x) & GENMASK(1, 0)) << 18) +#define I2CC_BUS_AUTO_RELEASE BIT(17) +#define I2CC_M_SDA_LOCK_EN BIT(16) +#define I2CC_MULTI_MASTER_DIS BIT(15) +#define I2CC_M_SCL_DRIVE_EN BIT(14) +#define I2CC_MSB_STS BIT(9) +#define I2CC_SDA_DRIVE_1T_EN BIT(8) +#define I2CC_M_SDA_DRIVE_1T_EN BIT(7) +#define I2CC_M_HIGH_SPEED_EN BIT(6) +/* reserved 5 : 2 */ +#define I2CC_SLAVE_EN BIT(1) +#define I2CC_MASTER_EN BIT(0) + +/* 0x04 : I2CD Clock and AC Timing Control Register #1 */ +/* Base register value. These bits are always set by the driver. */ +#define I2CD_CACTC_BASE 0xfff00300 +#define I2CD_TCKHIGH_SHIFT 16 +#define I2CD_TCKLOW_SHIFT 12 +#define I2CD_THDDAT_SHIFT 10 +#define I2CD_TO_DIV_SHIFT 8 +#define I2CD_BASE_DIV_SHIFT 0 + +/* 0x08 : I2CC Master/Slave Transmit/Receive Byte Buffer Register */ +#define I2CC_TX_DIR_MASK GENMASK(31, 29) +#define I2CC_SDA_OE BIT(28) +#define I2CC_SDA_O BIT(27) +#define I2CC_SCL_OE BIT(26) +#define I2CC_SCL_O BIT(25) + +#define I2CC_SCL_LINE_STS BIT(18) +#define I2CC_SDA_LINE_STS BIT(17) +#define I2CC_BUS_BUSY_STS BIT(16) +#define I2CC_GET_RX_BUFF(x) (((x) >> 8) & GENMASK(7, 0)) + +/* 0x10 : I2CM Master Interrupt Control Register */ +/* 0x14 : I2CM Master Interrupt Status Register */ +#define I2CM_PKT_TIMEOUT BIT(18) +#define I2CM_PKT_ERROR BIT(17) +#define I2CM_PKT_DONE BIT(16) + +#define I2CM_BUS_RECOVER_FAIL BIT(15) +#define I2CM_SDA_DL_TO BIT(14) +#define I2CM_BUS_RECOVER BIT(13) +#define I2CM_SMBUS_ALT BIT(12) + +#define I2CM_SCL_LOW_TO BIT(6) +#define I2CM_ABNORMAL BIT(5) +#define I2CM_NORMAL_STOP BIT(4) +#define I2CM_ARBIT_LOSS BIT(3) +#define I2CM_RX_DONE BIT(2) +#define I2CM_TX_NAK BIT(1) +#define I2CM_TX_ACK BIT(0) + +/* 0x18 : I2CM Master Command/Status Register */ +#define I2CM_PKT_ADDR(x) (((x) & GENMASK(6, 0)) << 24) +#define I2CM_PKT_EN BIT(16) +#define I2CM_SDA_OE_OUT_DIR BIT(15) +#define I2CM_SDA_O_OUT_DIR BIT(14) +#define I2CM_SCL_OE_OUT_DIR BIT(13) +#define I2CM_SCL_O_OUT_DIR BIT(12) +#define I2CM_RECOVER_CMD_EN BIT(11) + +#define I2CM_RX_DMA_EN BIT(9) +#define I2CM_TX_DMA_EN BIT(8) +/* Command Bit */ +#define I2CM_RX_BUFF_EN BIT(7) +#define I2CM_TX_BUFF_EN BIT(6) +#define I2CM_STOP_CMD BIT(5) +#define I2CM_RX_CMD_LAST BIT(4) +#define I2CM_RX_CMD BIT(3) + +#define I2CM_TX_CMD BIT(1) +#define I2CM_START_CMD BIT(0) + +#define I2C_TIMEOUT_US 100000 + +/* I2C Global Register */ +#define I2CG_ISR 0x00 +#define I2CG_SLAVE_ISR 0x04 +#define I2CG_OWNER 0x08 +#define I2CG_CTRL 0x0C +#define I2CG_CLK_DIV_CTRL 0x10 + +#define I2CG_SLAVE_PKT_NAK BIT(4) +#define I2CG_M_S_SEPARATE_INTR BIT(3) +#define I2CG_CTRL_NEW_REG BIT(2) +#define I2CG_CTRL_NEW_CLK_DIV BIT(1) + +#define GLOBAL_INIT \ + (I2CG_SLAVE_PKT_NAK | \ + I2CG_CTRL_NEW_REG | \ + I2CG_CTRL_NEW_CLK_DIV) +#define I2CCG_DIV_CTRL 0xc6411208 + +#define GET_CLK1_DIV(x) ((x) & 0xff) +#define GET_CLK2_DIV(x) (((x) >> 8) & 0xff) +#define GET_CLK3_DIV(x) (((x) >> 16) & 0xff) +#define GET_CLK4_DIV(x) (((x) >> 24) & 0xff) + +#endif /* __AST2600_I2C_H_ */ |