4  * SPDX-License-Identifier: Apache-2.0
15 #define DEV_BASE(dev) (((struct lpc11u6x_i2c_config *)(dev->config))->base)
23 	clock_control_get_rate(clk_dev, (clock_control_subsys_t) cfg->clkid,  in lpc11u6x_i2c_set_bus_speed()
27 	cfg->base->sclh = div / 2;  in lpc11u6x_i2c_set_bus_speed()
28 	cfg->base->scll = div - (div / 2);  in lpc11u6x_i2c_set_bus_speed()
34 	const struct lpc11u6x_i2c_config *cfg = dev->config;  in lpc11u6x_i2c_configure()
35 	struct lpc11u6x_i2c_data *data = dev->data;  in lpc11u6x_i2c_configure()
53 		return -ENOTSUP;  in lpc11u6x_i2c_configure()
55 		return -EINVAL;  in lpc11u6x_i2c_configure()
59 		return -ENOTSUP;  in lpc11u6x_i2c_configure()
62 	k_mutex_lock(&data->mutex, K_FOREVER);  in lpc11u6x_i2c_configure()
63 	lpc11u6x_i2c_set_bus_speed(cfg, cfg->clock_dev, speed);  in lpc11u6x_i2c_configure()
65 	ret = pinctrl_apply_state(cfg->pincfg, mux_selection);  in lpc11u6x_i2c_configure()
67 		k_mutex_unlock(&data->mutex);  in lpc11u6x_i2c_configure()
70 	k_mutex_unlock(&data->mutex);  in lpc11u6x_i2c_configure()
78 	const struct lpc11u6x_i2c_config *cfg = dev->config;  in lpc11u6x_i2c_transfer()
79 	struct lpc11u6x_i2c_data *data = dev->data;  in lpc11u6x_i2c_transfer()
86 	k_mutex_lock(&data->mutex, K_FOREVER);  in lpc11u6x_i2c_transfer()
88 	data->transfer.msgs = msgs;  in lpc11u6x_i2c_transfer()
89 	data->transfer.curr_buf = msgs->buf;  in lpc11u6x_i2c_transfer()
90 	data->transfer.curr_len = msgs->len;  in lpc11u6x_i2c_transfer()
91 	data->transfer.nr_msgs = num_msgs;  in lpc11u6x_i2c_transfer()
92 	data->transfer.addr = addr;  in lpc11u6x_i2c_transfer()
95 	cfg->base->con_clr = LPC11U6X_I2C_CONTROL_SI |  in lpc11u6x_i2c_transfer()
99 	data->transfer.status = LPC11U6X_I2C_STATUS_BUSY;  in lpc11u6x_i2c_transfer()
100 	cfg->base->con_set = LPC11U6X_I2C_CONTROL_START;  in lpc11u6x_i2c_transfer()
102 	k_sem_take(&data->completion, K_FOREVER);  in lpc11u6x_i2c_transfer()
104 	if (data->transfer.status != LPC11U6X_I2C_STATUS_OK) {  in lpc11u6x_i2c_transfer()
105 		ret = -EIO;  in lpc11u6x_i2c_transfer()
107 	data->transfer.status = LPC11U6X_I2C_STATUS_INACTIVE;  in lpc11u6x_i2c_transfer()
109 	/* If a slave is registered, put the controller in slave mode */  in lpc11u6x_i2c_transfer()
110 	if (data->slave) {  in lpc11u6x_i2c_transfer()
111 		cfg->base->con_set = LPC11U6X_I2C_CONTROL_AA;  in lpc11u6x_i2c_transfer()
114 	k_mutex_unlock(&data->mutex);  in lpc11u6x_i2c_transfer()
121 	const struct lpc11u6x_i2c_config *dev_cfg = dev->config;  in lpc11u6x_i2c_slave_register()
122 	struct lpc11u6x_i2c_data *data = dev->data;  in lpc11u6x_i2c_slave_register()
126 		return -EINVAL;  in lpc11u6x_i2c_slave_register()
129 	if (cfg->flags & I2C_TARGET_FLAGS_ADDR_10_BITS) {  in lpc11u6x_i2c_slave_register()
130 		return -ENOTSUP;  in lpc11u6x_i2c_slave_register()
133 	k_mutex_lock(&data->mutex, K_FOREVER);  in lpc11u6x_i2c_slave_register()
134 	if (data->slave) {  in lpc11u6x_i2c_slave_register()
135 		ret = -EBUSY;  in lpc11u6x_i2c_slave_register()
139 	data->slave = cfg;  in lpc11u6x_i2c_slave_register()
140 	/* Configure controller to act as slave */  in lpc11u6x_i2c_slave_register()
141 	dev_cfg->base->addr0 = (cfg->address << 1);  in lpc11u6x_i2c_slave_register()
142 	dev_cfg->base->con_clr = LPC11U6X_I2C_CONTROL_START |  in lpc11u6x_i2c_slave_register()
144 	dev_cfg->base->con_set = LPC11U6X_I2C_CONTROL_AA;  in lpc11u6x_i2c_slave_register()
147 	k_mutex_unlock(&data->mutex);  in lpc11u6x_i2c_slave_register()
155 	const struct lpc11u6x_i2c_config *dev_cfg = dev->config;  in lpc11u6x_i2c_slave_unregister()
156 	struct lpc11u6x_i2c_data *data = dev->data;  in lpc11u6x_i2c_slave_unregister()
159 		return -EINVAL;  in lpc11u6x_i2c_slave_unregister()
161 	if (data->slave != cfg) {  in lpc11u6x_i2c_slave_unregister()
162 		return -EINVAL;  in lpc11u6x_i2c_slave_unregister()
165 	k_mutex_lock(&data->mutex, K_FOREVER);  in lpc11u6x_i2c_slave_unregister()
166 	data->slave = NULL;  in lpc11u6x_i2c_slave_unregister()
167 	dev_cfg->base->con_clr = LPC11U6X_I2C_CONTROL_AA;  in lpc11u6x_i2c_slave_unregister()
168 	k_mutex_unlock(&data->mutex);  in lpc11u6x_i2c_slave_unregister()
175 	struct lpc11u6x_i2c_data *data = dev->data;  in lpc11u6x_i2c_isr()
177 	struct lpc11u6x_i2c_current_transfer *transfer = &data->transfer;  in lpc11u6x_i2c_isr()
182 	switch (i2c->stat) {  in lpc11u6x_i2c_isr()
186 		i2c->dat = (transfer->addr << 1) |  in lpc11u6x_i2c_isr()
187 			(transfer->msgs->flags & I2C_MSG_READ);  in lpc11u6x_i2c_isr()
189 		transfer->curr_buf = transfer->msgs->buf;  in lpc11u6x_i2c_isr()
190 		transfer->curr_len = transfer->msgs->len;  in lpc11u6x_i2c_isr()
195 		if (!transfer->curr_len) {  in lpc11u6x_i2c_isr()
196 			transfer->msgs++;  in lpc11u6x_i2c_isr()
197 			transfer->nr_msgs--;  in lpc11u6x_i2c_isr()
198 			if (!transfer->nr_msgs) {  in lpc11u6x_i2c_isr()
199 				transfer->status = LPC11U6X_I2C_STATUS_OK;  in lpc11u6x_i2c_isr()
205 			i2c->dat = transfer->curr_buf[0];  in lpc11u6x_i2c_isr()
206 			transfer->curr_buf++;  in lpc11u6x_i2c_isr()
207 			transfer->curr_len--;  in lpc11u6x_i2c_isr()
213 		transfer->msgs++;  in lpc11u6x_i2c_isr()
214 		transfer->nr_msgs--;  in lpc11u6x_i2c_isr()
215 		set |= (transfer->nr_msgs ? LPC11U6X_I2C_CONTROL_START :  in lpc11u6x_i2c_isr()
217 		if (!transfer->nr_msgs) {  in lpc11u6x_i2c_isr()
218 			transfer->status = LPC11U6X_I2C_STATUS_OK;  in lpc11u6x_i2c_isr()
222 		transfer->curr_buf[0] = i2c->dat;  in lpc11u6x_i2c_isr()
223 		transfer->curr_buf++;  in lpc11u6x_i2c_isr()
224 		transfer->curr_len--;  in lpc11u6x_i2c_isr()
227 		if (transfer->curr_len <= 1) {  in lpc11u6x_i2c_isr()
234 		/* Slave States */  in lpc11u6x_i2c_isr()
239 		if (data->slave->callbacks->write_requested(data->slave)) {  in lpc11u6x_i2c_isr()
246 		val = i2c->dat;  in lpc11u6x_i2c_isr()
247 		if (data->slave->callbacks->write_received(data->slave, val)) {  in lpc11u6x_i2c_isr()
254 		val = i2c->dat;  in lpc11u6x_i2c_isr()
255 		data->slave->callbacks->write_received(data->slave, val);  in lpc11u6x_i2c_isr()
256 		data->slave->callbacks->stop(data->slave);  in lpc11u6x_i2c_isr()
261 		data->slave->callbacks->stop(data->slave);  in lpc11u6x_i2c_isr()
267 		if (data->slave->callbacks->read_requested(data->slave, &val)) {  in lpc11u6x_i2c_isr()
270 		i2c->dat = val;  in lpc11u6x_i2c_isr()
273 		if (data->slave->callbacks->read_processed(data->slave, &val)) {  in lpc11u6x_i2c_isr()
276 		i2c->dat = val;  in lpc11u6x_i2c_isr()
280 		data->slave->callbacks->stop(data->slave);  in lpc11u6x_i2c_isr()
289 		transfer->status = LPC11U6X_I2C_STATUS_FAIL;  in lpc11u6x_i2c_isr()
298 	i2c->con_clr = clear;  in lpc11u6x_i2c_isr()
299 	i2c->con_set = set;  in lpc11u6x_i2c_isr()
300 	if ((transfer->status != LPC11U6X_I2C_STATUS_BUSY) &&  in lpc11u6x_i2c_isr()
301 	    (transfer->status != LPC11U6X_I2C_STATUS_INACTIVE)) {  in lpc11u6x_i2c_isr()
302 		k_sem_give(&data->completion);  in lpc11u6x_i2c_isr()
309 	const struct lpc11u6x_i2c_config *cfg = dev->config;  in lpc11u6x_i2c_init()
310 	struct lpc11u6x_i2c_data *data = dev->data;  in lpc11u6x_i2c_init()
313 	err = pinctrl_apply_state(cfg->pincfg, PINCTRL_STATE_DEFAULT);  in lpc11u6x_i2c_init()
318 	if (!device_is_ready(cfg->clock_dev)) {  in lpc11u6x_i2c_init()
319 		return -ENODEV;  in lpc11u6x_i2c_init()
322 	/* Configure clock and de-assert reset for I2Cx */  in lpc11u6x_i2c_init()
323 	clock_control_on(cfg->clock_dev, (clock_control_subsys_t) cfg->clkid);  in lpc11u6x_i2c_init()
326 	lpc11u6x_i2c_set_bus_speed(cfg, cfg->clock_dev, 100000);  in lpc11u6x_i2c_init()
329 	cfg->base->con_clr = LPC11U6X_I2C_CONTROL_AA | LPC11U6X_I2C_CONTROL_SI |  in lpc11u6x_i2c_init()
331 	cfg->base->con_set = LPC11U6X_I2C_CONTROL_I2C_EN;  in lpc11u6x_i2c_init()
334 	k_mutex_init(&data->mutex);  in lpc11u6x_i2c_init()
335 	k_sem_init(&data->completion, 0, 1);  in lpc11u6x_i2c_init()
337 	data->transfer.status = LPC11U6X_I2C_STATUS_INACTIVE;  in lpc11u6x_i2c_init()
339 	cfg->irq_config_func(dev);  in lpc11u6x_i2c_init()