linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 *  Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds

 */

​

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/termios.h>

#include <linux/tty.h>

#include <linux/export.h>

​

​

/*

 * Routine which returns the baud rate of the tty

 *

 * Note that the baud_table needs to be kept in sync with the

 * include/asm/termbits.h file.

 */

static const speed_t baud_table[] = {

    0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,

    9600, 19200, 38400, 57600, 115200, 230400, 460800,

#ifdef __sparc__

    76800, 153600, 307200, 614400, 921600

#else

    500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000,

    2500000, 3000000, 3500000, 4000000

#endif

};

​

#ifndef __sparc__

static const tcflag_t baud_bits[] = {

    B0, B50, B75, B110, B134, B150, B200, B300, B600,

    B1200, B1800, B2400, B4800, B9600, B19200, B38400,

    B57600, B115200, B230400, B460800, B500000, B576000,

    B921600, B1000000, B1152000, B1500000, B2000000, B2500000,

    B3000000, B3500000, B4000000

};

#else

static const tcflag_t baud_bits[] = {

    B0, B50, B75, B110, B134, B150, B200, B300, B600,

    B1200, B1800, B2400, B4800, B9600, B19200, B38400,

    B57600, B115200, B230400, B460800, B76800, B153600,

    B307200, B614400, B921600

};

#endif

​

static int n_baud_table = ARRAY_SIZE(baud_table);

​

/**

 *  tty_termios_baud_rate

 *  @termios: termios structure

 *

 *  Convert termios baud rate data into a speed. This should be called

 *  with the termios lock held if this termios is a terminal termios

 *  structure. May change the termios data. Device drivers can call this

 *  function but should use ->c_[io]speed directly as they are updated.

 *

 *  Locking: none

 */

​

speed_t tty_termios_baud_rate(struct ktermios *termios)

{

    unsigned int cbaud;