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/*

 *  linux/drivers/char/tty_io.c

 *

 *  Copyright (C) 1991, 1992  Linus Torvalds

 */

#include <linuxcomp.h>

#include <linux/config.h>

#include <linux/types.h>

#include <linux/major.h>

#include <linux/errno.h>

#include <linux/signal.h>

#include <linux/fcntl.h>

#include <linux/sched.h>

#include <linux/interrupt.h>

#include <linux/tty.h>

#include <linux/tty_driver.h>

#include <linux/tty_flip.h>

#include <linux/devpts_fs.h>

#include <linux/file.h>

#include <linux/console.h>

#include <linux/timer.h>

#include <linux/ctype.h>

#include <linux/kd.h>

#include <linux/mm.h>

#include <linux/string.h>

#include <linux/slab.h>

#include <linux/poll.h>

#include <linux/proc_fs.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/smp_lock.h>

#include <linux/device.h>

#include <asm/uaccess.h>

#include <asm/system.h>

#include <asm/bitops.h>

#include <linux/kbd_kern.h>

#include <linux/vt_kern.h>

#include <linux/selection.h>

#include <linux/devfs_fs_kernel.h>

#include <linux/kmod.h>

#undef TTY_DEBUG_HANGUP

#define TTY_PARANOIA_CHECK 1

#define CHECK_TTY_COUNT 1

struct tty_ldisc ldiscs[NR_LDISCS];

struct termios tty_std_termios = {      /* for the benefit of tty drivers  */

        .c_iflag = ICRNL | IXON,

        .c_oflag = OPOST | ONLCR,

  .c_cflag = B38400 | CS8 | CREAD | HUPCL,

        .c_lflag = ISIG | ICANON | ECHO | ECHOE | ECHOK |

                   ECHOCTL | ECHOKE | IEXTEN,

        .c_cc = INIT_C_CC

};

struct tty_driver *alloc_tty_driver(int lines)

{

        struct tty_driver *driver;

        driver = kmalloc(sizeof(struct tty_driver), GFP_KERNEL);

        if (driver) {

                memset(driver, 0, sizeof(struct tty_driver));

                driver->magic = TTY_DRIVER_MAGIC;

                driver->num = lines;

                /* later we'll move allocation of tables here */

        }

        return driver;

}

void put_tty_driver(struct tty_driver *driver)

{

        kfree(driver);

}

void tty_set_operations(struct tty_driver *driver, struct tty_operations *op)

{

        driver->open = op->open;

        driver->close = op->close;

        driver->write = op->write;

        driver->put_char = op->put_char;

        driver->flush_chars = op->flush_chars;

        driver->write_room = op->write_room;

        driver->chars_in_buffer = op->chars_in_buffer;

        driver->ioctl = op->ioctl;

        driver->set_termios = op->set_termios;

        driver->throttle = op->throttle;

        driver->unthrottle = op->unthrottle;

        driver->stop = op->stop;

        driver->start = op->start;

        driver->hangup = op->hangup;

        driver->break_ctl = op->break_ctl;

        driver->flush_buffer = op->flush_buffer;

        driver->set_ldisc = op->set_ldisc;

        driver->wait_until_sent = op->wait_until_sent;

        driver->send_xchar = op->send_xchar;

        driver->read_proc = op->read_proc;

        driver->write_proc = op->write_proc;

        driver->tiocmget = op->tiocmget;

        driver->tiocmset = op->tiocmset;

}

int tty_register_driver(struct tty_driver *driver)

{

        return 0;

}

int tty_unregister_driver(struct tty_driver *driver)

{

        return 0;

}

void tty_register_device(struct tty_driver *driver, unsigned index,

                         struct device *device)

{

}

void tty_unregister_device(struct tty_driver *driver, unsigned index)

{

}

void tty_flip_buffer_push(struct tty_struct *tty)

{

  printk(KERN_INFO "%c\n", *(tty->flip.char_buf_ptr -1));

}

static void flush_to_ldisc(void *private_)

{

}

static struct tty_struct *alloc_tty_struct(void)

{

        struct tty_struct *tty;

        tty = kmalloc(sizeof(struct tty_struct), GFP_KERNEL);

//      if (tty)

//              memset(tty, 0, sizeof(struct tty_struct));

        return tty;

}

void do_tty_hangup(void *data)

{

}

/*

 * This subroutine initializes a tty structure.

 */

static void initialize_tty_struct(struct tty_struct *tty)

{

        memset(tty, 0, sizeof(struct tty_struct));

        tty->magic = TTY_MAGIC;

        tty->ldisc = ldiscs[N_TTY];

        tty->pgrp = -1;

        tty->flip.char_buf_ptr = tty->flip.char_buf;

        tty->flip.flag_buf_ptr = tty->flip.flag_buf;

        INIT_WORK(&tty->flip.work, flush_to_ldisc, tty);

        init_MUTEX(&tty->flip.pty_sem);

        init_waitqueue_head(&tty->write_wait);

        init_waitqueue_head(&tty->read_wait);

        INIT_WORK(&tty->hangup_work, do_tty_hangup, tty);

        //*sema_init(&tty->atomic_read, 1);

        //*sema_init(&tty->atomic_write, 1);

        spin_lock_init(&tty->read_lock);

        INIT_LIST_HEAD(&tty->tty_files);

        INIT_WORK(&tty->SAK_work, NULL, NULL);

}

extern int serial_open (struct tty_struct *tty, struct file * filp);

extern int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count);

struct tty_struct *tty;

int serial_usbport_open(int port_number)

{

        int retval;

        tty = alloc_tty_struct();

        if(!tty)

                goto fail_no_mem;

        initialize_tty_struct (tty);

        tty->termios = malloc (sizeof(struct termios));

        *(tty->termios) = tty_std_termios;

        retval = serial_open(tty, NULL);

        return retval;

fail_no_mem:

        return -ENOMEM;

}

int serial_usbport_write(const unsigned char *buf, int count)

{

        int retval;

        retval = serial_write(tty, 0, buf, count);

        return retval;

//  printk(KERN_DEBUG "######### retval=%d\n", retval);

}