/*
 * Copyright (C) 2009 Sergey Kubushyn <ksi@koi8.net>
 *
 * Changes for multibus/multiadapter I2C support.
 *
 * (C) Copyright 2000
 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */

#include <config.h>
#include <common.h>
#include <errno.h>
#include <stdarg.h>
#include <malloc.h>
#include <stdio_dev.h>
#include <serial.h>
#ifdef CONFIG_LOGBUFFER
#include <logbuff.h>
#endif

#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
#include <i2c.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

static struct stdio_dev devs;
struct stdio_dev *stdio_devices[] = { NULL, NULL, NULL };
char *stdio_names[MAX_FILES] = { "stdin", "stdout", "stderr" };

#if defined(CONFIG_SPLASH_SCREEN) && !defined(CONFIG_SYS_DEVICE_NULLDEV)
#define CONFIG_SYS_DEVICE_NULLDEV       1
#endif

#ifdef  CONFIG_SYS_STDIO_DEREGISTER
#define CONFIG_SYS_DEVICE_NULLDEV       1
#endif

#ifdef CONFIG_SYS_DEVICE_NULLDEV
static void nulldev_putc(struct stdio_dev *dev, const char c)
{
        /* nulldev is empty! */
}

static void nulldev_puts(struct stdio_dev *dev, const char *s)
{
        /* nulldev is empty! */
}

static int nulldev_input(struct stdio_dev *dev)
{
        /* nulldev is empty! */
        return 0;
}
#endif

static void stdio_serial_putc(struct stdio_dev *dev, const char c)
{
        serial_putc(c);
}

static void stdio_serial_puts(struct stdio_dev *dev, const char *s)
{
        serial_puts(s);
}

static int stdio_serial_getc(struct stdio_dev *dev)
{
        return serial_getc();
}

static int stdio_serial_tstc(struct stdio_dev *dev)
{
        return serial_tstc();
}

/**************************************************************************
 * SYSTEM DRIVERS
 **************************************************************************
 */

static void drv_system_init (void)
{
        struct stdio_dev dev;

        memset (&dev, 0, sizeof (dev));

        strcpy (dev.name, "serial");
        dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
        dev.putc = stdio_serial_putc;
        dev.puts = stdio_serial_puts;
        dev.getc = stdio_serial_getc;
        dev.tstc = stdio_serial_tstc;
        stdio_register (&dev);

#ifdef CONFIG_SYS_DEVICE_NULLDEV
        memset (&dev, 0, sizeof (dev));

        strcpy (dev.name, "nulldev");
        dev.flags = DEV_FLAGS_OUTPUT | DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
        dev.putc = nulldev_putc;
        dev.puts = nulldev_puts;
        dev.getc = nulldev_input;
        dev.tstc = nulldev_input;

        stdio_register (&dev);
#endif
}

/**************************************************************************
 * DEVICES
 **************************************************************************
 */
struct list_head* stdio_get_list(void)
{
        return &(devs.list);
}

struct stdio_dev* stdio_get_by_name(const char *name)
{
        struct list_head *pos;
        struct stdio_dev *dev;

        if(!name)
                return NULL;

        list_for_each(pos, &(devs.list)) {
                dev = list_entry(pos, struct stdio_dev, list);
                if(strcmp(dev->name, name) == 0)
                        return dev;
        }

        return NULL;
}

struct stdio_dev* stdio_clone(struct stdio_dev *dev)
{
        struct stdio_dev *_dev;

        if(!dev)
                return NULL;

        _dev = calloc(1, sizeof(struct stdio_dev));

        if(!_dev)
                return NULL;

        memcpy(_dev, dev, sizeof(struct stdio_dev));

        return _dev;
}

int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp)
{
        struct stdio_dev *_dev;

        _dev = stdio_clone(dev);
        if(!_dev)
                return -ENODEV;
        list_add_tail(&(_dev->list), &(devs.list));
        if (devp)
                *devp = _dev;

        return 0;
}

int stdio_register(struct stdio_dev *dev)
{
        return stdio_register_dev(dev, NULL);
}

/* deregister the device "devname".
 * returns 0 if success, -1 if device is assigned and 1 if devname not found
 */
#ifdef  CONFIG_SYS_STDIO_DEREGISTER
int stdio_deregister_dev(struct stdio_dev *dev, int force)
{
        int l;
        struct list_head *pos;
        char temp_names[3][16];

        /* get stdio devices (ListRemoveItem changes the dev list) */
        for (l=0 ; l< MAX_FILES; l++) {
                if (stdio_devices[l] == dev) {
                        if (force) {
                                strcpy(temp_names[l], "nulldev");
                                continue;
                        }
                        /* Device is assigned -> report error */
                        return -1;
                }
                memcpy (&temp_names[l][0],
                        stdio_devices[l]->name,
                        sizeof(temp_names[l]));
        }

        list_del(&(dev->list));
        free(dev);

        /* reassign Device list */
        list_for_each(pos, &(devs.list)) {
                dev = list_entry(pos, struct stdio_dev, list);
                for (l=0 ; l< MAX_FILES; l++) {
                        if(strcmp(dev->name, temp_names[l]) == 0)
                                stdio_devices[l] = dev;
                }
        }
        return 0;
}

int stdio_deregister(const char *devname, int force)
{
        struct stdio_dev *dev;

        dev = stdio_get_by_name(devname);

        if (!dev) /* device not found */
                return -ENODEV;

        return stdio_deregister_dev(dev, force);
}
#endif  /* CONFIG_SYS_STDIO_DEREGISTER */

int stdio_init_tables(void)
{
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
        /* already relocated for current ARM implementation */
        ulong relocation_offset = gd->reloc_off;
        int i;

        /* relocate device name pointers */
        for (i = 0; i < (sizeof (stdio_names) / sizeof (char *)); ++i) {
                stdio_names[i] = (char *) (((ulong) stdio_names[i]) +
                                                relocation_offset);
        }
#endif /* CONFIG_NEEDS_MANUAL_RELOC */

        /* Initialize the list */
        INIT_LIST_HEAD(&(devs.list));

        return 0;
}

int stdio_add_devices(void)
{
#ifdef CONFIG_SYS_I2C
        i2c_init_all();
#else
#if defined(CONFIG_HARD_I2C)
        i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
#endif
#ifdef CONFIG_LCD
        drv_lcd_init ();
#endif
#if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
        drv_video_init ();
#endif
#ifdef CONFIG_KEYBOARD
        drv_keyboard_init ();
#endif
#ifdef CONFIG_LOGBUFFER
        drv_logbuff_init ();
#endif
        drv_system_init ();
        serial_stdio_init ();
#ifdef CONFIG_USB_TTY
        drv_usbtty_init ();
#endif
#ifdef CONFIG_NETCONSOLE
        drv_nc_init ();
#endif
#ifdef CONFIG_JTAG_CONSOLE
        drv_jtag_console_init ();
#endif
#ifdef CONFIG_CBMEM_CONSOLE
        cbmemc_init();
#endif

        return 0;
}

int stdio_init(void)
{
        stdio_init_tables();
        stdio_add_devices();

        return 0;
}