9  * @brief I2C driver for Infineon XMC MCU family.
17 #include <zephyr/drivers/i2c.h>
20 #include "i2c-priv.h"
52 /* I2C speed */
71 	XMC_USIC_CH_t *i2c;  member
104 	/* Acquire semaphore (block I2C operation for another thread) */  in ifx_xmc4_i2c_configure()
109 	XMC_I2C_CH_Stop(config->i2c);  in ifx_xmc4_i2c_configure()
111 	/* Configure the I2C resource */  in ifx_xmc4_i2c_configure()
113 	XMC_I2C_CH_Init(config->i2c, &data->cfg);  in ifx_xmc4_i2c_configure()
114 	XMC_I2C_CH_SetInputSource(config->i2c, XMC_I2C_CH_INPUT_SCL, config->scl_src);  in ifx_xmc4_i2c_configure()
115 	XMC_I2C_CH_SetInputSource(config->i2c, XMC_I2C_CH_INPUT_SDA, config->sda_src);  in ifx_xmc4_i2c_configure()
117 		XMC_USIC_CH_SetFractionalDivider(config->i2c,  in ifx_xmc4_i2c_configure()
123 	XMC_I2C_CH_Start(config->i2c);  in ifx_xmc4_i2c_configure()
182 	/* Acquire semaphore (block I2C transfer for another thread) */  in ifx_xmc4_i2c_transfer()
194 		XMC_I2C_CH_ClearStatusFlag(config->i2c, 0xFFFFFFFF);  in ifx_xmc4_i2c_transfer()
202 				XMC_I2C_CH_MasterRepeatedStart(config->i2c, addr << 1, cmd_type);  in ifx_xmc4_i2c_transfer()
204 				XMC_I2C_CH_MasterStart(config->i2c, addr << 1, cmd_type);  in ifx_xmc4_i2c_transfer()
208 			while ((XMC_I2C_CH_GetStatusFlag(config->i2c) &  in ifx_xmc4_i2c_transfer()
211 				if (XMC_I2C_CH_GetStatusFlag(config->i2c) &  in ifx_xmc4_i2c_transfer()
217 			XMC_I2C_CH_ClearStatusFlag(config->i2c,  in ifx_xmc4_i2c_transfer()
223 				/* Transmit next command from I2C master to I2C slave */  in ifx_xmc4_i2c_transfer()
224 				XMC_I2C_CH_MasterTransmit(config->i2c,  in ifx_xmc4_i2c_transfer()
228 				while ((XMC_I2C_CH_GetStatusFlag(config->i2c) &  in ifx_xmc4_i2c_transfer()
231 					if (XMC_I2C_CH_GetStatusFlag(config->i2c) &  in ifx_xmc4_i2c_transfer()
237 				XMC_I2C_CH_ClearStatusFlag(config->i2c,  in ifx_xmc4_i2c_transfer()
241 				while (!XMC_USIC_CH_TXFIFO_IsEmpty(config->i2c)) {  in ifx_xmc4_i2c_transfer()
243 					if (XMC_I2C_CH_GetStatusFlag(config->i2c) &  in ifx_xmc4_i2c_transfer()
251 					XMC_I2C_CH_MasterReceiveNack(config->i2c);  in ifx_xmc4_i2c_transfer()
253 					XMC_I2C_CH_MasterReceiveAck(config->i2c);  in ifx_xmc4_i2c_transfer()
256 				while ((XMC_I2C_CH_GetStatusFlag(config->i2c) &  in ifx_xmc4_i2c_transfer()
260 					if (XMC_I2C_CH_GetStatusFlag(config->i2c) &  in ifx_xmc4_i2c_transfer()
266 				XMC_I2C_CH_ClearStatusFlag(config->i2c,  in ifx_xmc4_i2c_transfer()
271 					XMC_I2C_CH_GetReceivedData(config->i2c);  in ifx_xmc4_i2c_transfer()
277 			XMC_I2C_CH_MasterStop(config->i2c);  in ifx_xmc4_i2c_transfer()
281 	/* Release semaphore (After I2C transfer is complete) */  in ifx_xmc4_i2c_transfer()
326 	/* Acquire semaphore (block I2C operation for another thread) */  in ifx_xmc4_i2c_target_register()
358 	/* Acquire semaphore (block I2C operation for another thread) */  in ifx_xmc4_i2c_target_unregister()
364 	XMC_I2C_CH_DisableEvent(config->i2c, I2C_XMC_EVENTS_MASK);  in ifx_xmc4_i2c_target_unregister()
377 	uint32_t status = XMC_I2C_CH_GetStatusFlag(config->i2c);  in i2c_xmc4_isr()
380 		XMC_I2C_CH_ClearStatusFlag(config->i2c, status);  in i2c_xmc4_isr()
384 			XMC_USIC_CH_SetTransmitBufferStatus(config->i2c,  in i2c_xmc4_isr()
398 				XMC_I2C_CH_SlaveTransmit(config->i2c, data->target_wr_byte);  in i2c_xmc4_isr()
407 			XMC_I2C_CH_SlaveTransmit(config->i2c, data->target_wr_byte);  in i2c_xmc4_isr()
414 						  XMC_I2C_CH_GetReceivedData(config->i2c));  in i2c_xmc4_isr()
422 		status = XMC_I2C_CH_GetStatusFlag(config->i2c);  in i2c_xmc4_isr()
427 /* I2C API structure */
428 static DEVICE_API(i2c, i2c_xmc4_driver_api) = {
439 /* Macros for I2C instance declaration */
447 		XMC_I2C_CH_SelectInterruptNodePointer(config->i2c,                                 \
449 		XMC_I2C_CH_SelectInterruptNodePointer(config->i2c,                                 \
452 		XMC_I2C_CH_EnableEvent(config->i2c, I2C_XMC_EVENTS_MASK);                          \
469 		.i2c = (XMC_USIC_CH_t *)DT_INST_REG_ADDR(n),                                       \