8  * @brief UART driver for the SiFive Freedom Processor
15 #include <zephyr/drivers/uart.h>
80  * @param dev UART device struct
86 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_poll_out()  local
89 	while (uart->tx & TXDATA_FULL) {  in uart_sifive_poll_out()
92 	uart->tx = (int)c;  in uart_sifive_poll_out()
98  * @param dev UART device struct
105 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_poll_in()  local
106 	uint32_t val = uart->rx;  in uart_sifive_poll_in()
122  * @param dev UART device struct
132 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_fifo_fill()  local
135 	for (i = 0; i < size && !(uart->tx & TXDATA_FULL); i++)  in uart_sifive_fifo_fill()
136 		uart->tx = (int)tx_data[i];  in uart_sifive_fifo_fill()
144  * @param dev UART device struct
154 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_fifo_read()  local
159 		val = uart->rx;  in uart_sifive_fifo_read()
173  * @param dev UART device struct
177 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_tx_enable()  local
179 	uart->ie |= IE_TXWM;  in uart_sifive_irq_tx_enable()
185  * @param dev UART device struct
189 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_tx_disable()  local
191 	uart->ie &= ~IE_TXWM;  in uart_sifive_irq_tx_disable()
197  * @param dev UART device struct
203 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_tx_ready()  local
205 	return !!(uart->ip & IE_TXWM);  in uart_sifive_irq_tx_ready()
211  * @param dev UART device struct
217 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_tx_complete()  local
223 	return !(uart->tx & TXDATA_FULL);  in uart_sifive_irq_tx_complete()
229  * @param dev UART device struct
233 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_rx_enable()  local
235 	uart->ie |= IE_RXWM;  in uart_sifive_irq_rx_enable()
241  * @param dev UART device struct
245 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_rx_disable()  local
247 	uart->ie &= ~IE_RXWM;  in uart_sifive_irq_rx_disable()
253  * @param dev UART device struct
259 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_rx_ready()  local
261 	return !!(uart->ip & IE_RXWM);  in uart_sifive_irq_rx_ready()
278  * @param dev UART device struct
284 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_irq_is_pending()  local
286 	return !!(uart->ip & (IE_RXWM | IE_TXWM));  in uart_sifive_irq_is_pending()
297  * @param dev UART device struct
324 	volatile struct uart_sifive_regs_t *uart = DEV_UART(dev);  in uart_sifive_init()  local
330 	uart->txctrl = TXCTRL_TXEN | CTRL_CNT(cfg->txcnt_irq);  in uart_sifive_init()
331 	uart->rxctrl = RXCTRL_RXEN | CTRL_CNT(cfg->rxcnt_irq);  in uart_sifive_init()
334 	uart->div = cfg->sys_clk_freq / cfg->baud_rate - 1;  in uart_sifive_init()
337 	/* Ensure that uart IRQ is disabled initially */  in uart_sifive_init()
338 	uart->ie = 0U;  in uart_sifive_init()