4  * SPDX-License-Identifier: Apache-2.0
13 #include <zephyr/drivers/i2c.h>
22 #include <driverlib/i2c.h>
29 #include "i2c-priv.h"
44 	(((const struct i2c_cc32xx_config *const)(dev)->config)->base)
53  * I2C API without having to re-read I2C registers.
56 	/* I2C was primed for a write operation */
58 	/* I2C was primed for a read operation */
60 	/* I2C error occurred */
91 		return -EINVAL;  in i2c_cc32xx_configure()
95 		return -EINVAL;  in i2c_cc32xx_configure()
106 		return -EINVAL;  in i2c_cc32xx_configure()
118 	struct i2c_cc32xx_data *data = dev->data;  in i2c_cc32xx_prime_transfer()
122 	data->msg = *msg;  in i2c_cc32xx_prime_transfer()
123 	data->slave_addr = addr;  in i2c_cc32xx_prime_transfer()
126 	if (IS_I2C_MSG_WRITE(data->msg.flags)) {  in i2c_cc32xx_prime_transfer()
128 		/* Specify the I2C slave address */  in i2c_cc32xx_prime_transfer()
131 		/* Update the I2C state */  in i2c_cc32xx_prime_transfer()
132 		data->state = I2C_CC32XX_WRITE_MODE;  in i2c_cc32xx_prime_transfer()
135 		MAP_I2CMasterDataPut(base, *((data->msg.buf)++));  in i2c_cc32xx_prime_transfer()
137 		/* Start the I2C transfer in master transmit mode */  in i2c_cc32xx_prime_transfer()
142 		/* Specify the I2C slave address */  in i2c_cc32xx_prime_transfer()
145 		/* Update the I2C mode */  in i2c_cc32xx_prime_transfer()
146 		data->state = I2C_CC32XX_READ_MODE;  in i2c_cc32xx_prime_transfer()
148 		if (data->msg.len < 2) {  in i2c_cc32xx_prime_transfer()
149 			/* Start the I2C transfer in master receive mode */  in i2c_cc32xx_prime_transfer()
153 			/* Start the I2C transfer in burst receive mode */  in i2c_cc32xx_prime_transfer()
163 	struct i2c_cc32xx_data *data = dev->data;  in i2c_cc32xx_transfer()
167 	k_sem_take(&data->mutex, K_FOREVER);  in i2c_cc32xx_transfer()
176 		k_sem_take(&data->transfer_complete, K_FOREVER);  in i2c_cc32xx_transfer()
179 		if (data->state == I2C_CC32XX_ERROR) {  in i2c_cc32xx_transfer()
180 			retval = -EIO;  in i2c_cc32xx_transfer()
189 	k_sem_give(&data->mutex);  in i2c_cc32xx_transfer()
198 	data->msg.len--;  in i2c_cc32xx_isr_handle_write()
201 	if (data->msg.len) {  in i2c_cc32xx_isr_handle_write()
204 		MAP_I2CMasterDataPut(base, *(data->msg.buf));  in i2c_cc32xx_isr_handle_write()
205 		data->msg.buf++;  in i2c_cc32xx_isr_handle_write()
207 		if (data->msg.len < 2) {  in i2c_cc32xx_isr_handle_write()
236 	*(data->msg.buf) = MAP_I2CMasterDataGet(base);  in i2c_cc32xx_isr_handle_read()
237 	data->msg.buf++;  in i2c_cc32xx_isr_handle_read()
240 	data->msg.len--;  in i2c_cc32xx_isr_handle_read()
241 	if (data->msg.len) {  in i2c_cc32xx_isr_handle_read()
242 		if (data->msg.len > 1) {  in i2c_cc32xx_isr_handle_read()
266 	struct i2c_cc32xx_data *data = dev->data;  in i2c_cc32xx_isr()
270 	/* Get the error  status of the I2C controller */  in i2c_cc32xx_isr()
280 		    data->state, err_status, int_status);  in i2c_cc32xx_isr()
282 	/* Handle errors: */  in i2c_cc32xx_isr()
288 		data->state = I2C_CC32XX_ERROR;  in i2c_cc32xx_isr()
292 			/* Send a STOP bit to end I2C communications */  in i2c_cc32xx_isr()
294 			 * I2C_MASTER_CMD_BURST_SEND_ERROR_STOP -and-  in i2c_cc32xx_isr()
302 		k_sem_give(&data->transfer_complete);  in i2c_cc32xx_isr()
307 		k_sem_give(&data->transfer_complete);  in i2c_cc32xx_isr()
311 		if (data->state == I2C_CC32XX_WRITE_MODE) {  in i2c_cc32xx_isr()
314 		if (data->state == I2C_CC32XX_READ_MODE) {  in i2c_cc32xx_isr()
319 		__ASSERT(1, "Unanticipated I2C Interrupt!");  in i2c_cc32xx_isr()
320 		data->state = I2C_CC32XX_ERROR;  in i2c_cc32xx_isr()
321 		k_sem_give(&data->transfer_complete);  in i2c_cc32xx_isr()
328 	const struct i2c_cc32xx_config *config = dev->config;  in i2c_cc32xx_init()
329 	struct i2c_cc32xx_data *data = dev->data;  in i2c_cc32xx_init()
334 	/* Enable the I2C module clocks and wait for completion:*/  in i2c_cc32xx_init()
341 	error = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);  in i2c_cc32xx_init()
346 	k_sem_init(&data->mutex, 1, K_SEM_MAX_LIMIT);  in i2c_cc32xx_init()
347 	k_sem_init(&data->transfer_complete, 0, K_SEM_MAX_LIMIT);  in i2c_cc32xx_init()
349 	/* In case of app restart: disable I2C module, clear NVIC interrupt */  in i2c_cc32xx_init()
354 	MAP_IntPendClear((unsigned long)(config->irq_no + 16));  in i2c_cc32xx_init()
358 	/* Take I2C hardware semaphore. */  in i2c_cc32xx_init()
364 	bitrate_cfg = i2c_map_dt_bitrate(config->bitrate);  in i2c_cc32xx_init()
373 	/* Enable the I2C Master for operation */  in i2c_cc32xx_init()
376 	/* Unmask I2C interrupts */  in i2c_cc32xx_init()
382 static DEVICE_API(i2c, i2c_cc32xx_driver_api) = {
412 	irq_enable(config->irq_no);  in configure_i2c_irq()