C++ (Cpp) uart8250_mem_init Examples

Example #1

File: uart8250mem.c Project: tidatida/coreboot

void uart_init(int idx)
{
	void *base = uart_platform_baseptr(idx);
	if (!base)
		return;

	unsigned int div;
	div = uart_baudrate_divisor(default_baudrate(), uart_platform_refclk(), 16);
	uart8250_mem_init(base, div);
}

Example #2

File: uart8250mem.c Project: lkundrak/coreboot

void uart_init(int idx)
{
	void *base = uart_platform_baseptr(idx);
	if (!base)
		return;

	unsigned int div;
	div = uart_baudrate_divisor(get_uart_baudrate(),
		uart_platform_refclk(), uart_input_clock_divider());
	uart8250_mem_init(base, div);
}

Example #3

File: uart8250mem.c Project: mytbk/coreboot

u32 uart_mem_init(void)
{
	unsigned uart_baud = CONFIG_TTYS0_BAUD;
	u32 uart_bar = 0;
	unsigned div;

	/* find out the correct baud rate */
#if !defined(__SMM__) && CONFIG_USE_OPTION_TABLE
	static const unsigned baud[8] = { 115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200 };
	unsigned b_index = 0;
#if defined(__PRE_RAM__)
	b_index = read_option(baud_rate, 0);
	b_index &= 7;
	uart_baud = baud[b_index];
#else
	if (get_option(&b_index, "baud_rate") == CB_SUCCESS)
		uart_baud = baud[b_index];
#endif
#endif

	/* Now find the UART base address and calculate the divisor */
#if CONFIG_DRIVERS_OXFORD_OXPCIE

#if defined(MORE_TESTING) && !defined(__SIMPLE_DEVICE__)
	device_t dev = dev_find_device(0x1415, 0xc158, NULL);
	if (!dev)
		dev = dev_find_device(0x1415, 0xc11b, NULL);

	if (dev) {
		struct resource *res = find_resource(dev, 0x10);

		if (res) {
			uart_bar = res->base + 0x1000; // for 1st UART
			// uart_bar = res->base + 0x2000; // for 2nd UART
		}
	}

	if (!uart_bar)
#endif
	uart_bar = CONFIG_OXFORD_OXPCIE_BASE_ADDRESS + 0x1000; // 1st UART
	// uart_bar = CONFIG_OXFORD_OXPCIE_BASE_ADDRESS + 0x2000; // 2nd UART

	div = 4000000 / uart_baud;
#endif

	if (uart_bar)
		uart8250_mem_init(uart_bar, div);

	return uart_bar;
}

Example #4

File: uart.c Project: pcengines/coreboot

void pch_uart_init(void)
{
	/* Program IOBP CB000154h[12,9:8,4:0] = 1001100011111b */
	u32 gpiodf = 0x131f;
#if defined(__SIMPLE_DEVICE__)
	pci_devfn_t dev;
#else
	struct device *dev;
#endif

	/* Put UART in byte access mode for 16550 compatibility */
	switch (CONFIG_INTEL_PCH_UART_CONSOLE_NUMBER) {
	case 0:
		dev = PCH_DEV_UART0;
		gpiodf |= SIO_IOBP_GPIODF_UART0_BYTE_ACCESS;
		break;
	case 1:
		dev = PCH_DEV_UART1;
		gpiodf |= SIO_IOBP_GPIODF_UART1_BYTE_ACCESS;
		break;
	default:
		return;
	}

	/* Program IOBP GPIODF */
	pch_iobp_update(SIO_IOBP_GPIODF, ~gpiodf, gpiodf);

	/* Program IOBP CB000180h[5:0] = 111111b (undefined register) */
	pch_iobp_update(0xcb000180, ~0x0000003f, 0x0000003f);

	/* Initialize chipset uart interface */
	reg_script_run_on_dev(dev, uart_init);

	/*
	 * Perform standard UART initialization
	 * Divisor 1 is 115200 BAUD
	 */
	uart8250_mem_init(CONFIG_TTYS0_BASE, 1);
}