embox

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/**
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 * @file
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 *
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 * @date Mar 11, 2023
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 * @author Anton Bondarev
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 */
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#include <stdint.h>
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#include <hal/reg.h>
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#include <drivers/serial/uart_dev.h>
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#include <drivers/serial/diag_serial.h>
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#include "muart.h"
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static int muart_uart_setup(struct uart *dev, const struct uart_params *params) {
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	struct muart_regs *regs = (struct muart_regs *)dev->base_addr;
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	REG32_STORE(&regs->bdiv, 50000000UL/params->baud_rate);
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	REG32_STORE(&regs->ctrl,
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			MUART_CTRL_STOP_BITS(MUART_1_STOP_BIT) |
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			MUART_CTRL_WORD_LEN(MUART_WORD_LEN_8) |
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			MUART_CTRL_POL_MODE |
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			MUART_CTRL_APB_FIFO_MODE |
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			MUART_CTRL_ENABLE);
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	if (params->uart_param_flags & UART_PARAM_FLAGS_USE_IRQ) {
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		REG16_STORE(&regs->fifowm.rx_num , 0); /* 1 byte */
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		REG32_STORE(&regs->mask, MUART_IRQ_RX);
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	}
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	return 0;
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}
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static int muart_uart_has_symbol(struct uart *dev) {
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	struct muart_regs *regs = (struct muart_regs *)dev->base_addr;
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	uint16_t rx_state;
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	rx_state = REG16_LOAD(&regs->fifo_status.rx_num);
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	return (int)rx_state;
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}
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static int muart_uart_getc(struct uart *dev) {
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	struct muart_regs *regs = (struct muart_regs *)dev->base_addr;
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	int ch;
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	ch = (int)(REG32_LOAD(&regs->drec) & 0xFF);
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	if (muart_uart_has_symbol(dev) == 0) {
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		/* read status reg to switch off interrupt bit */
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		REG32_LOAD(&regs->status);
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	}
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	return ch;
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}
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static int muart_uart_putc(struct uart *dev, int ch) {
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	struct muart_regs *regs = (struct muart_regs *)dev->base_addr;
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	while ( REG16_LOAD(&regs->fifo_status.tx_num)) {
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	}
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	REG32_STORE(&regs->dtrans, ch);
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	return 0;
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}
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const struct uart_ops muart_uart_uart_ops = {
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		.uart_getc = muart_uart_getc,
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		.uart_putc = muart_uart_putc,
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		.uart_hasrx = muart_uart_has_symbol,
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		.uart_setup = muart_uart_setup,
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};
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