2  * SPDX-License-Identifier: Apache-2.0
58 	struct sy1xx_uart_config *config = (struct sy1xx_uart_config *)dev->config;  in sy1xx_uart_configure()
60 	if (uart_cfg->baudrate == 0) {  in sy1xx_uart_configure()
61 		return -1;  in sy1xx_uart_configure()
66 	 * and then will restart from 0, so we must give div - 1 as  in sy1xx_uart_configure()
67 	 * divider  in sy1xx_uart_configure()
69 	uint32_t divider = sy1xx_soc_get_peripheral_clock() / uart_cfg->baudrate - 1;  in sy1xx_uart_configure()  local
72 	 * [31:16]: clock divider (from SoC clock)  in sy1xx_uart_configure()
77 	 * [2:1]: bits     00 = 5 bits  in sy1xx_uart_configure()
85 	volatile uint32_t setup = 0x0306 | uart_cfg->parity;  in sy1xx_uart_configure()
87 	setup |= ((divider) << 16);  in sy1xx_uart_configure()
88 	SY1XX_UDMA_WRITE_REG(config->base, SY1XX_UDMA_SETUP_REG, setup);  in sy1xx_uart_configure()
104  *  - < 0: Error
105  *  -   0: OK
106  *  - > 0: Busy
110 	struct sy1xx_uart_config *config = (struct sy1xx_uart_config *)dev->config;  in sy1xx_uart_read()
111 	struct sy1xx_uart_data *data = (struct sy1xx_uart_data *)dev->data;  in sy1xx_uart_read()
114 		return -1;  in sy1xx_uart_read()
117 	uint32_t max_read_size = request->data_len;  in sy1xx_uart_read()
119 	request->data_len = 0;  in sy1xx_uart_read()
122 		return -3;  in sy1xx_uart_read()
128 	int32_t remaining_bytes = SY1XX_UDMA_READ_REG(config->base, SY1XX_UDMA_RX_SIZE_REG);  in sy1xx_uart_read()
129 	int32_t bytes_transferred = (DEVICE_MAX_BUFFER_SIZE - remaining_bytes);  in sy1xx_uart_read()
136 			request->data[i] = data->read[i];  in sy1xx_uart_read()
140 		request->data_len = bytes_transferred;  in sy1xx_uart_read()
143 		SY1XX_UDMA_CANCEL_RX(config->base);  in sy1xx_uart_read()
146 		SY1XX_UDMA_START_RX(config->base, (int32_t)data->read, DEVICE_MAX_BUFFER_SIZE, 0);  in sy1xx_uart_read()
161  *  - < 0: Error
162  *  -   0: OK
163  *  - > 0: Busy
167 	struct sy1xx_uart_config *config = (struct sy1xx_uart_config *)dev->config;  in sy1xx_uart_write()
168 	struct sy1xx_uart_data *data = (struct sy1xx_uart_data *)dev->data;  in sy1xx_uart_write()
171 		return -1;  in sy1xx_uart_write()
174 	if (request->data_len == 0) {  in sy1xx_uart_write()
175 		return -1;  in sy1xx_uart_write()
178 	if (request->data_len > DEVICE_MAX_BUFFER_SIZE) {  in sy1xx_uart_write()
180 		return -2;  in sy1xx_uart_write()
183 	if (0 == SY1XX_UDMA_IS_FINISHED_TX(config->base)) {  in sy1xx_uart_write()
188 	uint32_t remaining_bytes = SY1XX_UDMA_GET_REMAINING_TX(config->base);  in sy1xx_uart_write()
191 		SY1XX_UDMA_CANCEL_TX(config->base);  in sy1xx_uart_write()
192 		return -3;  in sy1xx_uart_write()
196 	for (uint32_t i = 0; i < request->data_len; i++) {  in sy1xx_uart_write()
197 		data->write[i] = request->data[i];  in sy1xx_uart_write()
201 	SY1XX_UDMA_START_TX(config->base, (uint32_t)data->write, request->data_len, 0);  in sy1xx_uart_write()
210 static int sy1xx_uart_poll_in(const struct device *dev, unsigned char *c)  in sy1xx_uart_poll_in()
221 	return -1;  in sy1xx_uart_poll_in()
241 static int sy1xx_uart_err_check(const struct device *dev)  in sy1xx_uart_err_check()
243 	int err = 0;  in sy1xx_uart_err_check()
248 static int sy1xx_uart_init(const struct device *dev)  in sy1xx_uart_init()
250 	struct sy1xx_uart_config *config = (struct sy1xx_uart_config *)dev->config;  in sy1xx_uart_init()
251 	struct sy1xx_uart_data *data = (struct sy1xx_uart_data *)dev->data;  in sy1xx_uart_init()
254 		data->write[i] = 0xa5;  in sy1xx_uart_init()
255 		data->read[i] = 0xb4;  in sy1xx_uart_init()
259 	sy1xx_udma_enable_clock(SY1XX_UDMA_MODULE_UART, config->inst);  in sy1xx_uart_init()
283 		    SY1XX_PAD_CONFIG_ADDR_UART + (config->inst * 4 + 0));  in sy1xx_uart_init()
291 	SY1XX_UDMA_CANCEL_RX(config->base);  in sy1xx_uart_init()
292 	SY1XX_UDMA_CANCEL_TX(config->base);  in sy1xx_uart_init()