| /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
| #ifndef __I2C_VIAI2C_COMMON_H_ | |
| #define __I2C_VIAI2C_COMMON_H_ | |
| #include <linux/delay.h> | |
| #include <linux/err.h> | |
| #include <linux/i2c.h> | |
| #include <linux/interrupt.h> | |
| #include <linux/io.h> | |
| #include <linux/module.h> | |
| #include <linux/of_irq.h> | |
| #include <linux/platform_device.h> | |
| /* REG_CR Bit fields */ | |
| #define VIAI2C_REG_CR 0x00 | |
| #define VIAI2C_CR_ENABLE BIT(0) | |
| #define VIAI2C_CR_RX_END BIT(1) | |
| #define VIAI2C_CR_TX_END BIT(2) | |
| #define VIAI2C_CR_CPU_RDY BIT(3) | |
| #define VIAI2C_CR_END_MASK GENMASK(2, 1) | |
| /* REG_TCR Bit fields */ | |
| #define VIAI2C_REG_TCR 0x02 | |
| #define VIAI2C_TCR_HS_MODE BIT(13) | |
| #define VIAI2C_TCR_READ BIT(14) | |
| #define VIAI2C_TCR_FAST BIT(15) | |
| #define VIAI2C_TCR_ADDR_MASK GENMASK(6, 0) | |
| /* REG_CSR Bit fields */ | |
| #define VIAI2C_REG_CSR 0x04 | |
| #define VIAI2C_CSR_RCV_NOT_ACK BIT(0) | |
| #define VIAI2C_CSR_RCV_ACK_MASK BIT(0) | |
| #define VIAI2C_CSR_READY_MASK BIT(1) | |
| /* REG_ISR Bit fields */ | |
| #define VIAI2C_REG_ISR 0x06 | |
| #define VIAI2C_ISR_NACK_ADDR BIT(0) | |
| #define VIAI2C_ISR_BYTE_END BIT(1) | |
| #define VIAI2C_ISR_SCL_TIMEOUT BIT(2) | |
| #define VIAI2C_ISR_MASK_ALL GENMASK(2, 0) | |
| /* REG_IMR Bit fields */ | |
| #define VIAI2C_REG_IMR 0x08 | |
| #define VIAI2C_IMR_BYTE BIT(1) | |
| #define VIAI2C_IMR_ENABLE_ALL GENMASK(2, 0) | |
| #define VIAI2C_REG_CDR 0x0A | |
| #define VIAI2C_REG_TR 0x0C | |
| #define VIAI2C_REG_MCR 0x0E | |
| #define VIAI2C_TIMEOUT (msecs_to_jiffies(1000)) | |
| enum { | |
| VIAI2C_PLAT_WMT, | |
| VIAI2C_PLAT_ZHAOXIN | |
| }; | |
| enum { | |
| VIAI2C_BYTE_MODE, | |
| VIAI2C_FIFO_MODE | |
| }; | |
| struct viai2c { | |
| struct i2c_adapter adapter; | |
| struct completion complete; | |
| struct device *dev; | |
| void __iomem *base; | |
| struct clk *clk; | |
| u16 tcr; | |
| int irq; | |
| u16 xfered_len; | |
| struct i2c_msg *msg; | |
| int ret; | |
| bool last; | |
| unsigned int mode; | |
| unsigned int platform; | |
| void *pltfm_priv; | |
| }; | |
| int viai2c_wait_bus_not_busy(struct viai2c *i2c); | |
| int viai2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num); | |
| int viai2c_init(struct platform_device *pdev, struct viai2c **pi2c, int plat); | |
| int viai2c_irq_xfer(struct viai2c *i2c); | |
| #endif |