4  * SPDX-License-Identifier: Apache-2.0
20 #include "i2c-priv.h"
38 #define RCAR_I2C_ICSCR          0x00    /* Slave Control Register */
40 #define RCAR_I2C_ICSIER         0x10    /* Slave IRQ Enable */
42 #define RCAR_I2C_ICSSR          0x08    /* Slave Status */
45 #define RCAR_I2C_ICSAR          0x1c    /* Slave Address Register */
81 	return sys_read32(config->reg_addr + offs);  in i2c_rcar_read()
87 	sys_write32(value, config->reg_addr + offs);  in i2c_rcar_write()
92 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_isr()
93 	struct i2c_rcar_data *data = dev->data;  in i2c_rcar_isr()
95 	if (((i2c_rcar_read(config, RCAR_I2C_ICMSR)) & data->status_mask) ==  in i2c_rcar_isr()
96 	    data->status_mask) {  in i2c_rcar_isr()
97 		k_sem_give(&data->int_sem);  in i2c_rcar_isr()
104 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_wait_for_state()
105 	struct i2c_rcar_data *data = dev->data;  in i2c_rcar_wait_for_state()
107 	data->status_mask = mask;  in i2c_rcar_wait_for_state()
110 	k_sem_reset(&data->int_sem);  in i2c_rcar_wait_for_state()
116 	return k_sem_take(&data->int_sem, K_USEC(MAX_WAIT_US));  in i2c_rcar_wait_for_state()
121 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_finish()
141 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_set_addr()
143 	/* Set slave address & transfer mode */  in i2c_rcar_set_addr()
150 	/* Wait for address & transfer mode to be transmitted */  in i2c_rcar_set_addr()
160 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_transfer_msg()
164 	if ((msg->flags & I2C_MSG_RW_MASK) == I2C_MSG_READ) {  in i2c_rcar_transfer_msg()
168 		for (i = 0; i < msg->len; i++) {  in i2c_rcar_transfer_msg()
169 			if (msg->len - 1 == i) {  in i2c_rcar_transfer_msg()
185 			msg->buf[i] = i2c_rcar_read(config, RCAR_I2C_ICRXD_ICTXD) & 0xff;  in i2c_rcar_transfer_msg()
189 		for (i = 0; i < msg->len; i++) {  in i2c_rcar_transfer_msg()
190 			i2c_rcar_write(config, RCAR_I2C_ICRXD_ICTXD, msg->buf[i]);  in i2c_rcar_transfer_msg()
214 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_transfer()
228 		return -EIO;  in i2c_rcar_transfer()
232 		/* We are not supporting 10-bit addressing */  in i2c_rcar_transfer()
233 		if ((msgs->flags & I2C_MSG_ADDR_10_BITS) == I2C_MSG_ADDR_10_BITS) {  in i2c_rcar_transfer()
234 			return -ENOTSUP;  in i2c_rcar_transfer()
237 		/* Send slave address */  in i2c_rcar_transfer()
238 		if (i2c_rcar_set_addr(dev, addr, !!(msgs->flags & I2C_MSG_READ))) {  in i2c_rcar_transfer()
239 			return -EIO; /* No ACK received */  in i2c_rcar_transfer()
243 		if (msgs->len) {  in i2c_rcar_transfer()
251 		if ((msgs->flags & I2C_MSG_STOP) == I2C_MSG_STOP) {  in i2c_rcar_transfer()
260 		num_msgs--;  in i2c_rcar_transfer()
269 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_configure()
272 	/* We only support Master mode */  in i2c_rcar_configure()
274 		return -ENOTSUP;  in i2c_rcar_configure()
277 	/* We are not supporting 10-bit addressing */  in i2c_rcar_configure()
279 		return -ENOTSUP;  in i2c_rcar_configure()
294 		return -ENOTSUP;  in i2c_rcar_configure()
300 	/* Reset slave mode */  in i2c_rcar_configure()
306 	/* Reset master mode */  in i2c_rcar_configure()
317 	const struct i2c_rcar_cfg *config = dev->config;  in i2c_rcar_init()
318 	struct i2c_rcar_data *data = dev->data;  in i2c_rcar_init()
322 	k_sem_init(&data->int_sem, 0, 1);  in i2c_rcar_init()
324 	if (!device_is_ready(config->clock_dev)) {  in i2c_rcar_init()
325 		return -ENODEV;  in i2c_rcar_init()
328 	ret = clock_control_on(config->clock_dev,  in i2c_rcar_init()
329 			       (clock_control_subsys_t)&config->mod_clk);  in i2c_rcar_init()
335 	bitrate_cfg = i2c_map_dt_bitrate(config->bitrate);  in i2c_rcar_init()
342 	config->init_func(dev);  in i2c_rcar_init()