/*
 * (C) Copyright 2001
 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * serial.c - serial support for the gal ev board
 */

/* supports both the 16650 duart and the MPSC */

#include <common.h>
#include <command.h>
#include <galileo/memory.h>
#include <serial.h>
#include <linux/compiler.h>

#if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
#include <ns16550.h>
#endif

#include "mpsc.h"

DECLARE_GLOBAL_DATA_PTR;

#if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
const NS16550_t COM_PORTS[] = { (NS16550_t) CONFIG_SYS_NS16550_COM1,
				(NS16550_t) CONFIG_SYS_NS16550_COM2 };
#endif

#ifdef CONFIG_MPSC

static int evb64260_serial_init(void)
{
#if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
	int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
#endif

	mpsc_init(gd->baudrate);

	/* init the DUART chans so that KGDB in the kernel can use them */
#ifdef CONFIG_SYS_INIT_CHAN1
	NS16550_reinit(COM_PORTS[0], clock_divisor);
#endif
#ifdef CONFIG_SYS_INIT_CHAN2
	NS16550_reinit(COM_PORTS[1], clock_divisor);
#endif
	return (0);
}

static void evb64260_serial_putc(const char c)
{
	if (c == '\n')
		mpsc_putchar('\r');

	mpsc_putchar(c);
}

static int evb64260_serial_getc(void)
{
	return mpsc_getchar();
}

static int evb64260_serial_tstc(void)
{
	return mpsc_test_char();
}

static void evb64260_serial_setbrg(void)
{
	galbrg_set_baudrate(CONFIG_MPSC_PORT, gd->baudrate);
}

#else /* ! CONFIG_MPSC */

static int evb64260_serial_init(void)
{
	int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;

#ifdef CONFIG_SYS_INIT_CHAN1
	(void)NS16550_init(COM_PORTS[0], clock_divisor);
#endif
#ifdef CONFIG_SYS_INIT_CHAN2
	(void)NS16550_init(COM_PORTS[1], clock_divisor);
#endif

	return (0);
}

static void evb64260_serial_putc(const char c)
{
	if (c == '\n')
		NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], '\r');

	NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], c);
}

static int evb64260_serial_getc(void)
{
	return NS16550_getc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
}

static int evb64260_serial_tstc(void)
{
	return NS16550_tstc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
}

static void evb64260_serial_setbrg(void)
{
	int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;

#ifdef CONFIG_SYS_INIT_CHAN1
	NS16550_reinit(COM_PORTS[0], clock_divisor);
#endif
#ifdef CONFIG_SYS_INIT_CHAN2
	NS16550_reinit(COM_PORTS[1], clock_divisor);
#endif
}

#endif /* CONFIG_MPSC */

static struct serial_device evb64260_serial_drv = {
	.name	= "evb64260_serial",
	.start	= evb64260_serial_init,
	.stop	= NULL,
	.setbrg	= evb64260_serial_setbrg,
	.putc	= evb64260_serial_putc,
	.puts	= default_serial_puts,
	.getc	= evb64260_serial_getc,
	.tstc	= evb64260_serial_tstc,
};

void evb64260_serial_initialize(void)
{
	serial_register(&evb64260_serial_drv);
}

__weak struct serial_device *default_serial_console(void)
{
	return &evb64260_serial_drv;
}

#if defined(CONFIG_CMD_KGDB)
void
kgdb_serial_init(void)
{
}

void
putDebugChar (int c)
{
	serial_putc (c);
}

void
putDebugStr (const char *str)
{
	serial_puts (str);
}

int
getDebugChar (void)
{
	return serial_getc();
}

void
kgdb_interruptible (int yes)
{
	return;
}
#endif