int __init hvc_init(void)
{
int i;
memset(&hvc_driver, 0, sizeof(struct tty_driver));
hvc_driver.magic = TTY_DRIVER_MAGIC;
hvc_driver.driver_name = "hvc";
hvc_driver.name = "hvc/%d";
hvc_driver.major = HVC_MAJOR;
hvc_driver.minor_start = HVC_MINOR;
hvc_driver.num = hvc_count(&hvc_offset);
if (hvc_driver.num > MAX_NR_HVC_CONSOLES)
hvc_driver.num = MAX_NR_HVC_CONSOLES;
hvc_driver.type = TTY_DRIVER_TYPE_SYSTEM;
hvc_driver.init_termios = tty_std_termios;
hvc_driver.flags = TTY_DRIVER_REAL_RAW;
hvc_driver.refcount = &hvc_refcount;
hvc_driver.table = hvc_table;
hvc_driver.termios = hvc_termios;
hvc_driver.termios_locked = hvc_termios_locked;
hvc_driver.open = hvc_open;
hvc_driver.close = hvc_close;
hvc_driver.write = hvc_write;
hvc_driver.hangup = hvc_hangup;
hvc_driver.write_room = hvc_write_room;
hvc_driver.chars_in_buffer = hvc_chars_in_buffer;
for (i = 0; i < hvc_driver.num; i++) {
hvc_struct[i].lock = SPIN_LOCK_UNLOCKED;
hvc_struct[i].index = i;
tty_register_devfs(&hvc_driver, 0, hvc_driver.minor_start + i);
}
if (tty_register_driver(&hvc_driver))
panic("Couldn't register hvc console driver\n");
if (hvc_driver.num > 0)
kernel_thread(khvcd, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGNAL);
return 0;
}
static int pty_open(struct tty_struct *tty, struct file * filp)
{
int retval;
int line;
struct pty_struct *pty;
retval = -ENODEV;
if (!tty || !tty->link)
goto out;
line = MINOR(tty->device) - tty->driver.minor_start;
if ((line < 0) || (line >= NR_PTYS))
goto out;
pty = (struct pty_struct *)(tty->driver.driver_state) + line;
tty->driver_data = pty;
retval = -EIO;
if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
goto out;
if (test_bit(TTY_PTY_LOCK, &tty->link->flags))
goto out;
if (tty->link->count != 1)
goto out;
clear_bit(TTY_OTHER_CLOSED, &tty->link->flags);
wake_up_interruptible(&pty->open_wait);
set_bit(TTY_THROTTLED, &tty->flags);
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
/* Register a slave for the master */
if (tty->driver.major == PTY_MASTER_MAJOR)
tty_register_devfs(&tty->link->driver,
DEVFS_FL_CURRENT_OWNER | DEVFS_FL_WAIT,
tty->link->driver.minor_start +
MINOR(tty->device)-tty->driver.minor_start);
retval = 0;
out:
return retval;
}
int __init dz_init(void)
{
int i;
long flags;
struct dz_serial *info;
/* Setup base handler, and timer table. */
init_bh(SERIAL_BH, do_serial_bh);
show_serial_version();
memset(&serial_driver, 0, sizeof(struct tty_driver));
serial_driver.magic = TTY_DRIVER_MAGIC;
#if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
serial_driver.name = "ttyS";
#else
serial_driver.name = "tts/%d";
#endif
serial_driver.major = TTY_MAJOR;
serial_driver.minor_start = 64;
serial_driver.num = DZ_NB_PORT;
serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
serial_driver.subtype = SERIAL_TYPE_NORMAL;
serial_driver.init_termios = tty_std_termios;
serial_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
CLOCAL;
serial_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
serial_driver.refcount = &serial_refcount;
serial_driver.table = serial_table;
serial_driver.termios = serial_termios;
serial_driver.termios_locked = serial_termios_locked;
serial_driver.open = dz_open;
serial_driver.close = dz_close;
serial_driver.write = dz_write;
serial_driver.flush_chars = dz_flush_chars;
serial_driver.write_room = dz_write_room;
serial_driver.chars_in_buffer = dz_chars_in_buffer;
serial_driver.flush_buffer = dz_flush_buffer;
serial_driver.ioctl = dz_ioctl;
serial_driver.throttle = dz_throttle;
serial_driver.unthrottle = dz_unthrottle;
serial_driver.send_xchar = dz_send_xchar;
serial_driver.set_termios = dz_set_termios;
serial_driver.stop = dz_stop;
serial_driver.start = dz_start;
serial_driver.hangup = dz_hangup;
/*
* The callout device is just like normal device except for
* major number and the subtype code.
*/
callout_driver = serial_driver;
#if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
callout_driver.name = "cua";
#else
callout_driver.name = "cua/%d";
#endif
callout_driver.major = TTYAUX_MAJOR;
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
if (tty_register_driver(&serial_driver))
panic("Couldn't register serial driver");
if (tty_register_driver(&callout_driver))
panic("Couldn't register callout driver");
save_flags(flags);
cli();
for (i = 0; i < DZ_NB_PORT; i++) {
info = &multi[i];
lines[i] = info;
info->magic = SERIAL_MAGIC;
if (mips_machtype == MACH_DS23100 ||
mips_machtype == MACH_DS5100)
info->port = (unsigned long) KN01_DZ11_BASE;
else
info->port = (unsigned long) KN02_DZ11_BASE;
info->line = i;
info->tty = 0;
info->close_delay = 50;
info->closing_wait = 3000;
info->x_char = 0;
info->event = 0;
info->count = 0;
info->blocked_open = 0;
info->tqueue.routine = do_softint;
info->tqueue.data = info;
info->tqueue_hangup.routine = do_serial_hangup;
info->tqueue_hangup.data = info;
info->callout_termios = callout_driver.init_termios;
info->normal_termios = serial_driver.init_termios;
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
/*
* If we are pointing to address zero then punt - not correctly
* set up in setup.c to handle this.
*/
if (!info->port)
return 0;
printk("ttyS%02d at 0x%08x (irq = %d)\n", info->line,
info->port, dec_interrupt[DEC_IRQ_DZ11]);
tty_register_devfs(&serial_driver, 0,
serial_driver.minor_start + info->line);
tty_register_devfs(&callout_driver, 0,
callout_driver.minor_start + info->line);
}
/* reset the chip */
#ifndef CONFIG_SERIAL_DEC_CONSOLE
dz_out(info, DZ_CSR, DZ_CLR);
while (dz_in(info, DZ_CSR) & DZ_CLR);
iob();
/* enable scanning */
dz_out(info, DZ_CSR, DZ_MSE);
#endif
/* order matters here... the trick is that flags
is updated... in request_irq - to immediatedly obliterate
it is unwise. */
restore_flags(flags);
if (request_irq(dec_interrupt[DEC_IRQ_DZ11], dz_interrupt,
SA_INTERRUPT, "DZ", lines[0]))
panic("Unable to register DZ interrupt");
return 0;
}
