^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/termios.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Routine which returns the baud rate of the tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Note that the baud_table needs to be kept in sync with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * include/asm/termbits.h file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static const speed_t baud_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #ifdef __sparc__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 76800, 153600, 307200, 614400, 921600, 500000, 576000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 1000000, 1152000, 1500000, 2000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 2500000, 3000000, 3500000, 4000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static const tcflag_t baud_bits[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) B0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #ifdef __sparc__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) B76800, B153600, B307200, B614400, B921600, B500000, B576000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) B1000000, B1152000, B1500000, B2000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) B500000, B576000, B921600, B1000000, B1152000, B1500000, B2000000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) B2500000, B3000000, B3500000, B4000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int n_baud_table = ARRAY_SIZE(baud_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * tty_termios_baud_rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * @termios: termios structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * Convert termios baud rate data into a speed. This should be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * with the termios lock held if this termios is a terminal termios
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * structure. May change the termios data. Device drivers can call this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * function but should use ->c_[io]speed directly as they are updated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * Locking: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) speed_t tty_termios_baud_rate(struct ktermios *termios)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned int cbaud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) cbaud = termios->c_cflag & CBAUD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #ifdef BOTHER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* Magic token for arbitrary speed via c_ispeed/c_ospeed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (cbaud == BOTHER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return termios->c_ospeed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (cbaud & CBAUDEX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) cbaud &= ~CBAUDEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (cbaud < 1 || cbaud + 15 > n_baud_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) termios->c_cflag &= ~CBAUDEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) cbaud += 15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return cbaud >= n_baud_table ? 0 : baud_table[cbaud];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) EXPORT_SYMBOL(tty_termios_baud_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * tty_termios_input_baud_rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * @termios: termios structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * Convert termios baud rate data into a speed. This should be called
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * with the termios lock held if this termios is a terminal termios
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * structure. May change the termios data. Device drivers can call this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * function but should use ->c_[io]speed directly as they are updated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * Locking: none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) speed_t tty_termios_input_baud_rate(struct ktermios *termios)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #ifdef IBSHIFT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned int cbaud = (termios->c_cflag >> IBSHIFT) & CBAUD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (cbaud == B0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return tty_termios_baud_rate(termios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #ifdef BOTHER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* Magic token for arbitrary speed via c_ispeed*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (cbaud == BOTHER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return termios->c_ispeed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (cbaud & CBAUDEX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) cbaud &= ~CBAUDEX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (cbaud < 1 || cbaud + 15 > n_baud_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) termios->c_cflag &= ~(CBAUDEX << IBSHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) cbaud += 15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return cbaud >= n_baud_table ? 0 : baud_table[cbaud];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #else /* IBSHIFT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return tty_termios_baud_rate(termios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #endif /* IBSHIFT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) EXPORT_SYMBOL(tty_termios_input_baud_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * tty_termios_encode_baud_rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * @termios: ktermios structure holding user requested state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * @ibaud: input speed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * @obaud: output speed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * Encode the speeds set into the passed termios structure. This is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * used as a library helper for drivers so that they can report back
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * the actual speed selected when it differs from the speed requested
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * For maximal back compatibility with legacy SYS5/POSIX *nix behaviour
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * we need to carefully set the bits when the user does not get the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) * desired speed. We allow small margins and preserve as much of possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * of the input intent to keep compatibility.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * Locking: Caller should hold termios lock. This is already held
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * when calling this function from the driver termios handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * The ifdefs deal with platforms whose owners have yet to update them
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * and will all go away once this is done.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) void tty_termios_encode_baud_rate(struct ktermios *termios,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) speed_t ibaud, speed_t obaud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int ifound = -1, ofound = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int iclose = ibaud/50, oclose = obaud/50;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int ibinput = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (obaud == 0) /* CD dropped */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ibaud = 0; /* Clear ibaud to be sure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) termios->c_ispeed = ibaud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) termios->c_ospeed = obaud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #ifdef IBSHIFT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if ((termios->c_cflag >> IBSHIFT) & CBAUD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ibinput = 1; /* An input speed was specified */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) #ifdef BOTHER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /* If the user asked for a precise weird speed give a precise weird
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) answer. If they asked for a Bfoo speed they may have problems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) digesting non-exact replies so fuzz a bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if ((termios->c_cflag & CBAUD) == BOTHER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) oclose = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (!ibinput)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) iclose = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (((termios->c_cflag >> IBSHIFT) & CBAUD) == BOTHER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) iclose = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) termios->c_cflag &= ~CBAUD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) #ifdef IBSHIFT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) termios->c_cflag &= ~(CBAUD << IBSHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * Our goal is to find a close match to the standard baud rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * returned. Walk the baud rate table and if we get a very close
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * match then report back the speed as a POSIX Bxxxx value by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * preference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (obaud - oclose <= baud_table[i] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) obaud + oclose >= baud_table[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) termios->c_cflag |= baud_bits[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) ofound = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (ibaud - iclose <= baud_table[i] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) ibaud + iclose >= baud_table[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /* For the case input == output don't set IBAUD bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if the user didn't do so */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (ofound == i && !ibinput)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) ifound = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #ifdef IBSHIFT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) ifound = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) termios->c_cflag |= (baud_bits[i] << IBSHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) } while (++i < n_baud_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * If we found no match then use BOTHER if provided or warn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * the user their platform maintainer needs to wake up if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) #ifdef BOTHER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (ofound == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) termios->c_cflag |= BOTHER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /* Set exact input bits only if the input and output differ or the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) user already did */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (ifound == -1 && (ibaud != obaud || ibinput))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) termios->c_cflag |= (BOTHER << IBSHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) if (ifound == -1 || ofound == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) pr_warn_once("tty: Unable to return correct speed data as your architecture needs updating.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) EXPORT_SYMBOL_GPL(tty_termios_encode_baud_rate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * tty_encode_baud_rate - set baud rate of the tty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * @ibaud: input baud rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * @obaud: output baud rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * Update the current termios data for the tty with the new speed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * settings. The caller must hold the termios_rwsem for the tty in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * question.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) tty_termios_encode_baud_rate(&tty->termios, ibaud, obaud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) EXPORT_SYMBOL_GPL(tty_encode_baud_rate);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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