5  * SPDX-License-Identifier: Apache-2.0
21 #include "i2c-priv.h"
24 	((I2C_Type *)((const struct i2c_imx_config * const)(dev)->config)->base)
54 	struct i2c_imx_data *data = dev->data;  in i2c_imx_write()
55 	struct i2c_master_transfer *transfer = &data->transfer;  in i2c_imx_write()
57 	transfer->isBusy = true;  in i2c_imx_write()
59 	/* Clear I2C interrupt flag to avoid spurious interrupt */  in i2c_imx_write()
64 	transfer->currentDir = i2cDirectionTransmit;  in i2c_imx_write()
66 	transfer->txBuff = txBuffer;  in i2c_imx_write()
67 	transfer->txSize = txSize;  in i2c_imx_write()
69 	I2C_WriteByte(base, *transfer->txBuff);  in i2c_imx_write()
70 	transfer->txBuff++;  in i2c_imx_write()
71 	transfer->txSize--;  in i2c_imx_write()
73 	/* Enable I2C interrupt, subsequent data transfer will be handled  in i2c_imx_write()
79 	k_sem_take(&data->device_sync_sem, K_FOREVER);  in i2c_imx_write()
81 	return transfer->ack;  in i2c_imx_write()
88 	struct i2c_imx_data *data = dev->data;  in i2c_imx_read()
89 	struct i2c_master_transfer *transfer = &data->transfer;  in i2c_imx_read()
91 	transfer->isBusy = true;  in i2c_imx_read()
93 	/* Clear I2C interrupt flag to avoid spurious interrupt */  in i2c_imx_read()
98 	transfer->currentDir = i2cDirectionReceive;  in i2c_imx_read()
100 	transfer->rxBuff = rxBuffer;  in i2c_imx_read()
101 	transfer->rxSize = rxSize;  in i2c_imx_read()
103 	if (transfer->rxSize == 1U) {  in i2c_imx_read()
114 	/* Enable I2C interrupt, subsequent data transfer will be handled  in i2c_imx_read()
120 	k_sem_take(&data->device_sync_sem, K_FOREVER);  in i2c_imx_read()
128 	struct i2c_imx_data *data = dev->data;  in i2c_imx_configure()
129 	struct i2c_master_transfer *transfer = &data->transfer;  in i2c_imx_configure()
133 		return -EINVAL;  in i2c_imx_configure()
137 		return -EINVAL;  in i2c_imx_configure()
141 	transfer->txBuff = 0;  in i2c_imx_configure()
142 	transfer->rxBuff = 0;  in i2c_imx_configure()
143 	transfer->cmdSize = 0U;  in i2c_imx_configure()
144 	transfer->txSize = 0U;  in i2c_imx_configure()
145 	transfer->rxSize = 0U;  in i2c_imx_configure()
146 	transfer->isBusy = false;  in i2c_imx_configure()
147 	transfer->currentDir = i2cDirectionReceive;  in i2c_imx_configure()
148 	transfer->currentMode = i2cModeSlave;  in i2c_imx_configure()
161 		return -EINVAL;  in i2c_imx_configure()
192 	struct i2c_imx_data *data = dev->data;  in i2c_imx_transfer()
193 	struct i2c_master_transfer *transfer = &data->transfer;  in i2c_imx_transfer()
195 	int result = -EIO;  in i2c_imx_transfer()
202 	while ((I2C_I2SR_REG(base) & i2cStatusBusBusy) && (--timeout)) {  in i2c_imx_transfer()
211 	transfer->currentMode = i2cModeSlave;  in i2c_imx_transfer()
212 	/* Switch back to Rx direction. */  in i2c_imx_transfer()
214 	transfer->currentDir = i2cDirectionReceive;  in i2c_imx_transfer()
217 	transfer->currentDir = i2cDirectionTransmit;  in i2c_imx_transfer()
219 	transfer->currentMode = i2cModeMaster;  in i2c_imx_transfer()
222 	if (!i2c_imx_send_addr(dev, addr, msgs->flags)) {  in i2c_imx_transfer()
227 		if (msgs->flags & I2C_MSG_RESTART) {  in i2c_imx_transfer()
229 			if (!i2c_imx_send_addr(dev, addr, msgs->flags)) {  in i2c_imx_transfer()
235 		if (msgs->len) {  in i2c_imx_transfer()
236 			if ((msgs->flags & I2C_MSG_RW_MASK) == I2C_MSG_READ) {  in i2c_imx_transfer()
237 				i2c_imx_read(dev, msgs->buf, msgs->len);  in i2c_imx_transfer()
239 				if (!i2c_imx_write(dev, msgs->buf, msgs->len)) {  in i2c_imx_transfer()
245 		if (msgs->flags & I2C_MSG_STOP) {  in i2c_imx_transfer()
247 			transfer->currentMode = i2cModeSlave;  in i2c_imx_transfer()
249 			transfer->currentDir = i2cDirectionReceive;  in i2c_imx_transfer()
254 		num_msgs--;  in i2c_imx_transfer()
263 	transfer->currentMode = i2cModeSlave;  in i2c_imx_transfer()
265 	transfer->currentDir = i2cDirectionReceive;  in i2c_imx_transfer()
274 	struct i2c_imx_data *data = dev->data;  in i2c_imx_isr()
275 	struct i2c_master_transfer *transfer = &data->transfer;  in i2c_imx_isr()
277 	/* Clear interrupt flag. */  in i2c_imx_isr()
282 	if (!transfer->isBusy) {  in i2c_imx_isr()
286 	if (i2cModeMaster == transfer->currentMode) {  in i2c_imx_isr()
287 		if (i2cDirectionTransmit == transfer->currentDir) {  in i2c_imx_isr()
289 			transfer->ack =  in i2c_imx_isr()
292 			if (transfer->txSize == 0U) {  in i2c_imx_isr()
293 				/* Close I2C interrupt. */  in i2c_imx_isr()
296 				transfer->isBusy = false;  in i2c_imx_isr()
297 				k_sem_give(&data->device_sync_sem);  in i2c_imx_isr()
299 				I2C_WriteByte(base, *transfer->txBuff);  in i2c_imx_isr()
300 				transfer->txBuff++;  in i2c_imx_isr()
301 				transfer->txSize--;  in i2c_imx_isr()
305 			if (transfer->rxSize == 2U) {  in i2c_imx_isr()
313 			if (transfer->rxSize == 1U) {  in i2c_imx_isr()
314 				/* Switch back to Tx direction to avoid  in i2c_imx_isr()
318 				transfer->currentDir = i2cDirectionTransmit;  in i2c_imx_isr()
321 			*transfer->rxBuff = I2C_ReadByte(base);  in i2c_imx_isr()
322 			transfer->rxBuff++;  in i2c_imx_isr()
323 			transfer->rxSize--;  in i2c_imx_isr()
326 			if (transfer->rxSize == 0U) {  in i2c_imx_isr()
327 				/* Close I2C interrupt. */  in i2c_imx_isr()
330 				transfer->isBusy = false;  in i2c_imx_isr()
331 				k_sem_give(&data->device_sync_sem);  in i2c_imx_isr()
339 	const struct i2c_imx_config *config = dev->config;  in i2c_imx_init()
340 	struct i2c_imx_data *data = dev->data;  in i2c_imx_init()
344 	k_sem_init(&data->device_sync_sem, 0, K_SEM_MAX_LIMIT);  in i2c_imx_init()
346 	error = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);  in i2c_imx_init()
351 	bitrate_cfg = i2c_map_dt_bitrate(config->bitrate);  in i2c_imx_init()
358 	config->irq_config_func(dev);  in i2c_imx_init()