diff options
Diffstat (limited to 'drivers/staging/dgnc/dgnc_tty.c')
| -rw-r--r-- | drivers/staging/dgnc/dgnc_tty.c | 324 |
1 files changed, 159 insertions, 165 deletions
diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c index fbfe79a70263..48e4b90578c1 100644 --- a/drivers/staging/dgnc/dgnc_tty.c +++ b/drivers/staging/dgnc/dgnc_tty.c @@ -63,7 +63,6 @@ static struct digi_t dgnc_digi_init = { .digi_term = "ansi" /* default terminal type */ }; - /* * Define a local default termios struct. All ports will be created * with this termios initially. @@ -80,14 +79,17 @@ static struct ktermios DgncDefaultTermios = { .c_line = 0, }; - /* Our function prototypes */ static int dgnc_tty_open(struct tty_struct *tty, struct file *file); static void dgnc_tty_close(struct tty_struct *tty, struct file *file); -static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struct channel_t *ch); -static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg); -static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retinfo); -static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_info); +static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, + struct channel_t *ch); +static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, + unsigned long arg); +static int dgnc_tty_digigeta(struct tty_struct *tty, + struct digi_t __user *retinfo); +static int dgnc_tty_digiseta(struct tty_struct *tty, + struct digi_t __user *new_info); static int dgnc_tty_write_room(struct tty_struct *tty); static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c); static int dgnc_tty_chars_in_buffer(struct tty_struct *tty); @@ -98,17 +100,21 @@ static void dgnc_tty_unthrottle(struct tty_struct *tty); static void dgnc_tty_flush_chars(struct tty_struct *tty); static void dgnc_tty_flush_buffer(struct tty_struct *tty); static void dgnc_tty_hangup(struct tty_struct *tty); -static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, unsigned int __user *value); -static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value); +static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, + unsigned int __user *value); +static int dgnc_get_modem_info(struct channel_t *ch, + unsigned int __user *value); static int dgnc_tty_tiocmget(struct tty_struct *tty); -static int dgnc_tty_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear); +static int dgnc_tty_tiocmset(struct tty_struct *tty, unsigned int set, + unsigned int clear); static int dgnc_tty_send_break(struct tty_struct *tty, int msec); static void dgnc_tty_wait_until_sent(struct tty_struct *tty, int timeout); -static int dgnc_tty_write(struct tty_struct *tty, const unsigned char *buf, int count); -static void dgnc_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios); +static int dgnc_tty_write(struct tty_struct *tty, const unsigned char *buf, + int count); +static void dgnc_tty_set_termios(struct tty_struct *tty, + struct ktermios *old_termios); static void dgnc_tty_send_xchar(struct tty_struct *tty, char ch); - static const struct tty_operations dgnc_tty_ops = { .open = dgnc_tty_open, .close = dgnc_tty_close, @@ -163,7 +169,6 @@ int dgnc_tty_preinit(void) return 0; } - /* * dgnc_tty_register() * @@ -186,18 +191,24 @@ int dgnc_tty_register(struct dgnc_board *brd) brd->SerialDriver.subtype = SERIAL_TYPE_NORMAL; brd->SerialDriver.init_termios = DgncDefaultTermios; brd->SerialDriver.driver_name = DRVSTR; - brd->SerialDriver.flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK); + brd->SerialDriver.flags = (TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_HARDWARE_BREAK); /* * The kernel wants space to store pointers to * tty_struct's and termios's. */ - brd->SerialDriver.ttys = kcalloc(brd->maxports, sizeof(*brd->SerialDriver.ttys), GFP_KERNEL); + brd->SerialDriver.ttys = kcalloc(brd->maxports, + sizeof(*brd->SerialDriver.ttys), + GFP_KERNEL); if (!brd->SerialDriver.ttys) return -ENOMEM; kref_init(&brd->SerialDriver.kref); - brd->SerialDriver.termios = kcalloc(brd->maxports, sizeof(*brd->SerialDriver.termios), GFP_KERNEL); + brd->SerialDriver.termios = kcalloc(brd->maxports, + sizeof(*brd->SerialDriver.termios), + GFP_KERNEL); if (!brd->SerialDriver.termios) return -ENOMEM; @@ -235,18 +246,24 @@ int dgnc_tty_register(struct dgnc_board *brd) brd->PrintDriver.subtype = SERIAL_TYPE_NORMAL; brd->PrintDriver.init_termios = DgncDefaultTermios; brd->PrintDriver.driver_name = DRVSTR; - brd->PrintDriver.flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK); + brd->PrintDriver.flags = (TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_HARDWARE_BREAK); /* * The kernel wants space to store pointers to * tty_struct's and termios's. Must be separated from * the Serial Driver so we don't get confused */ - brd->PrintDriver.ttys = kcalloc(brd->maxports, sizeof(*brd->PrintDriver.ttys), GFP_KERNEL); + brd->PrintDriver.ttys = kcalloc(brd->maxports, + sizeof(*brd->PrintDriver.ttys), + GFP_KERNEL); if (!brd->PrintDriver.ttys) return -ENOMEM; kref_init(&brd->PrintDriver.kref); - brd->PrintDriver.termios = kcalloc(brd->maxports, sizeof(*brd->PrintDriver.termios), GFP_KERNEL); + brd->PrintDriver.termios = kcalloc(brd->maxports, + sizeof(*brd->PrintDriver.termios), + GFP_KERNEL); if (!brd->PrintDriver.termios) return -ENOMEM; @@ -275,7 +292,6 @@ int dgnc_tty_register(struct dgnc_board *brd) return rc; } - /* * dgnc_tty_init() * @@ -349,16 +365,15 @@ int dgnc_tty_init(struct dgnc_board *brd) struct device *classp; classp = tty_register_device(&brd->SerialDriver, i, - &(ch->ch_bd->pdev->dev)); + &ch->ch_bd->pdev->dev); ch->ch_tun.un_sysfs = classp; dgnc_create_tty_sysfs(&ch->ch_tun, classp); classp = tty_register_device(&brd->PrintDriver, i, - &(ch->ch_bd->pdev->dev)); + &ch->ch_bd->pdev->dev); ch->ch_pun.un_sysfs = classp; dgnc_create_tty_sysfs(&ch->ch_pun, classp); } - } return 0; @@ -371,7 +386,6 @@ err_free_channels: return -ENOMEM; } - /* * dgnc_tty_post_uninit() * @@ -383,7 +397,6 @@ void dgnc_tty_post_uninit(void) dgnc_TmpWriteBuf = NULL; } - /* * dgnc_tty_uninit() * @@ -476,9 +489,6 @@ static void dgnc_wmove(struct channel_t *ch, char *buf, uint n) ch->ch_w_head = head; } - - - /*======================================================================= * * dgnc_input - Process received data. @@ -529,9 +539,10 @@ void dgnc_input(struct channel_t *ch) * If the device is not open, or CREAD is off, * flush input data and return immediately. */ - if (!tp || (tp->magic != TTY_MAGIC) || !(ch->ch_tun.un_flags & UN_ISOPEN) || - !(tp->termios.c_cflag & CREAD) || (ch->ch_tun.un_flags & UN_CLOSING)) { - + if (!tp || (tp->magic != TTY_MAGIC) || + !(ch->ch_tun.un_flags & UN_ISOPEN) || + !(tp->termios.c_cflag & CREAD) || + (ch->ch_tun.un_flags & UN_CLOSING)) { ch->ch_r_head = tail; /* Force queue flow control to be released, if needed */ @@ -614,16 +625,28 @@ void dgnc_input(struct channel_t *ch) if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) { for (i = 0; i < s; i++) { if (*(ch->ch_equeue + tail + i) & UART_LSR_BI) - tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_BREAK); - else if (*(ch->ch_equeue + tail + i) & UART_LSR_PE) - tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_PARITY); - else if (*(ch->ch_equeue + tail + i) & UART_LSR_FE) - tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_FRAME); + tty_insert_flip_char(tp->port, + *(ch->ch_rqueue + tail + i), + TTY_BREAK); + else if (*(ch->ch_equeue + tail + i) & + UART_LSR_PE) + tty_insert_flip_char(tp->port, + *(ch->ch_rqueue + tail + i), + TTY_PARITY); + else if (*(ch->ch_equeue + tail + i) & + UART_LSR_FE) + tty_insert_flip_char(tp->port, + *(ch->ch_rqueue + tail + i), + TTY_FRAME); else - tty_insert_flip_char(tp->port, *(ch->ch_rqueue + tail + i), TTY_NORMAL); + tty_insert_flip_char(tp->port, + *(ch->ch_rqueue + tail + i), + TTY_NORMAL); } } else { - tty_insert_flip_string(tp->port, ch->ch_rqueue + tail, s); + tty_insert_flip_string(tp->port, + ch->ch_rqueue + tail, + s); } tail += s; @@ -650,7 +673,6 @@ exit_unlock: tty_ldisc_deref(ld); } - /************************************************************************ * Determines when CARRIER changes state and takes appropriate * action. @@ -683,13 +705,12 @@ void dgnc_carrier(struct channel_t *ch) * Test for a VIRTUAL carrier transition to HIGH. */ if (((ch->ch_flags & CH_FCAR) == 0) && (virt_carrier == 1)) { - /* * When carrier rises, wake any threads waiting * for carrier in the open routine. */ - if (waitqueue_active(&(ch->ch_flags_wait))) + if (waitqueue_active(&ch->ch_flags_wait)) wake_up_interruptible(&ch->ch_flags_wait); } @@ -697,13 +718,12 @@ void dgnc_carrier(struct channel_t *ch) * Test for a PHYSICAL carrier transition to HIGH. */ if (((ch->ch_flags & CH_CD) == 0) && (phys_carrier == 1)) { - /* * When carrier rises, wake any threads waiting * for carrier in the open routine. */ - if (waitqueue_active(&(ch->ch_flags_wait))) + if (waitqueue_active(&ch->ch_flags_wait)) wake_up_interruptible(&ch->ch_flags_wait); } @@ -718,7 +738,6 @@ void dgnc_carrier(struct channel_t *ch) */ if ((virt_carrier == 0) && ((ch->ch_flags & CH_CD) != 0) && (phys_carrier == 0)) { - /* * When carrier drops: * @@ -731,7 +750,7 @@ void dgnc_carrier(struct channel_t *ch) * * Enable all select calls. */ - if (waitqueue_active(&(ch->ch_flags_wait))) + if (waitqueue_active(&ch->ch_flags_wait)) wake_up_interruptible(&ch->ch_flags_wait); if (ch->ch_tun.un_open_count > 0) @@ -801,8 +820,8 @@ static void dgnc_set_custom_speed(struct channel_t *ch, uint newrate) */ if (testrate_high != newrate) { /* - * Otherwise, pick the rate that is closer (i.e. whichever rate - * has a smaller delta). + * Otherwise, pick the rate that is closer + * (i.e. whichever rate has a smaller delta). */ deltahigh = testrate_high - newrate; deltalow = newrate - testrate_low; @@ -817,10 +836,9 @@ static void dgnc_set_custom_speed(struct channel_t *ch, uint newrate) ch->ch_custom_speed = newrate; } - void dgnc_check_queue_flow_control(struct channel_t *ch) { - int qleft = 0; + int qleft; /* Store how much space we have left in the queue */ qleft = ch->ch_r_tail - ch->ch_r_head - 1; @@ -844,7 +862,8 @@ void dgnc_check_queue_flow_control(struct channel_t *ch) */ if (qleft < 256) { /* HWFLOW */ - if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS) { + if (ch->ch_digi.digi_flags & CTSPACE || + ch->ch_c_cflag & CRTSCTS) { if (!(ch->ch_flags & CH_RECEIVER_OFF)) { ch->ch_bd->bd_ops->disable_receiver(ch); ch->ch_flags |= (CH_RECEIVER_OFF); @@ -876,7 +895,8 @@ void dgnc_check_queue_flow_control(struct channel_t *ch) */ if (qleft > (RQUEUESIZE / 2)) { /* HWFLOW */ - if (ch->ch_digi.digi_flags & RTSPACE || ch->ch_c_cflag & CRTSCTS) { + if (ch->ch_digi.digi_flags & RTSPACE || + ch->ch_c_cflag & CRTSCTS) { if (ch->ch_flags & CH_RECEIVER_OFF) { ch->ch_bd->bd_ops->enable_receiver(ch); ch->ch_flags &= ~(CH_RECEIVER_OFF); @@ -890,7 +910,6 @@ void dgnc_check_queue_flow_control(struct channel_t *ch) } } - void dgnc_wakeup_writes(struct channel_t *ch) { int qlen = 0; @@ -915,9 +934,9 @@ void dgnc_wakeup_writes(struct channel_t *ch) if (ch->ch_tun.un_flags & UN_ISOPEN) { if ((ch->ch_tun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && - ch->ch_tun.un_tty->ldisc->ops->write_wakeup) { + ch->ch_tun.un_tty->ldisc->ops->write_wakeup) { spin_unlock_irqrestore(&ch->ch_lock, flags); - (ch->ch_tun.un_tty->ldisc->ops->write_wakeup)(ch->ch_tun.un_tty); + ch->ch_tun.un_tty->ldisc->ops->write_wakeup(ch->ch_tun.un_tty); spin_lock_irqsave(&ch->ch_lock, flags); } @@ -928,7 +947,8 @@ void dgnc_wakeup_writes(struct channel_t *ch) * the queue AND FIFO are both empty. */ if (ch->ch_tun.un_flags & UN_EMPTY) { - if ((qlen == 0) && (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) { + if ((qlen == 0) && + (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) { ch->ch_tun.un_flags &= ~(UN_EMPTY); /* @@ -956,9 +976,9 @@ void dgnc_wakeup_writes(struct channel_t *ch) if (ch->ch_pun.un_flags & UN_ISOPEN) { if ((ch->ch_pun.un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && - ch->ch_pun.un_tty->ldisc->ops->write_wakeup) { + ch->ch_pun.un_tty->ldisc->ops->write_wakeup) { spin_unlock_irqrestore(&ch->ch_lock, flags); - (ch->ch_pun.un_tty->ldisc->ops->write_wakeup)(ch->ch_pun.un_tty); + ch->ch_pun.un_tty->ldisc->ops->write_wakeup(ch->ch_pun.un_tty); spin_lock_irqsave(&ch->ch_lock, flags); } @@ -969,7 +989,8 @@ void dgnc_wakeup_writes(struct channel_t *ch) * the queue AND FIFO are both empty. */ if (ch->ch_pun.un_flags & UN_EMPTY) { - if ((qlen == 0) && (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) + if ((qlen == 0) && + (ch->ch_bd->bd_ops->get_uart_bytes_left(ch) == 0)) ch->ch_pun.un_flags &= ~(UN_EMPTY); } @@ -979,8 +1000,6 @@ void dgnc_wakeup_writes(struct channel_t *ch) spin_unlock_irqrestore(&ch->ch_lock, flags); } - - /************************************************************************ * * TTY Entry points and helper functions @@ -1019,7 +1038,7 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) * sleep waiting for it to happen or they cancel the open. */ rc = wait_event_interruptible(brd->state_wait, - (brd->state & BOARD_READY)); + (brd->state & BOARD_READY)); if (rc) return rc; @@ -1063,7 +1082,8 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) */ spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = wait_event_interruptible(ch->ch_flags_wait, ((ch->ch_flags & CH_OPENING) == 0)); + rc = wait_event_interruptible(ch->ch_flags_wait, + ((ch->ch_flags & CH_OPENING) == 0)); /* If ret is non-zero, user ctrl-c'ed us */ if (rc) @@ -1077,7 +1097,8 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) * ch_flags_wait to wake us back up. */ rc = wait_event_interruptible(ch->ch_flags_wait, - (((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_CLOSING) == 0)); + (((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & + UN_CLOSING) == 0)); /* If ret is non-zero, user ctrl-c'ed us */ if (rc) @@ -1085,11 +1106,9 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) spin_lock_irqsave(&ch->ch_lock, flags); - /* Store our unit into driver_data, so we always have it available. */ tty->driver_data = un; - /* * Initialize tty's */ @@ -1100,7 +1119,6 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) /* Maybe do something here to the TTY struct as well? */ } - /* * Allocate channel buffers for read/write/error. * Set flag, so we don't get trounced on. @@ -1126,7 +1144,6 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) * Initialize if neither terminal or printer is open. */ if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_ISOPEN)) { - /* * Flush input queues. */ @@ -1190,13 +1207,14 @@ static int dgnc_tty_open(struct tty_struct *tty, struct file *file) return rc; } - /* * dgnc_block_til_ready() * * Wait for DCD, if needed. */ -static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struct channel_t *ch) +static int dgnc_block_til_ready(struct tty_struct *tty, + struct file *file, + struct channel_t *ch) { int retval = 0; struct un_t *un = NULL; @@ -1204,7 +1222,8 @@ static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struc uint old_flags = 0; int sleep_on_un_flags = 0; - if (!tty || tty->magic != TTY_MAGIC || !file || !ch || ch->magic != DGNC_CHANNEL_MAGIC) + if (!tty || tty->magic != TTY_MAGIC || !file || !ch || + ch->magic != DGNC_CHANNEL_MAGIC) return -ENXIO; un = tty->driver_data; @@ -1217,11 +1236,11 @@ static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struc /* Loop forever */ while (1) { - sleep_on_un_flags = 0; /* - * If board has failed somehow during our sleep, bail with error. + * If board has failed somehow during our sleep, + * bail with error. */ if (ch->ch_bd->state == BOARD_FAILED) { retval = -ENXIO; @@ -1241,8 +1260,9 @@ static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struc * touched safely, the close routine will signal the * ch_wait_flags to wake us back up. */ - if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_CLOSING)) { - + if (!((ch->ch_tun.un_flags | + ch->ch_pun.un_flags) & + UN_CLOSING)) { /* * Our conditions to leave cleanly and happily: * 1) NONBLOCKING on the tty is set. @@ -1294,11 +1314,13 @@ static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struc spin_unlock_irqrestore(&ch->ch_lock, flags); /* - * Wait for something in the flags to change from the current value. + * Wait for something in the flags to change + * from the current value. */ if (sleep_on_un_flags) retval = wait_event_interruptible(un->un_flags_wait, - (old_flags != (ch->ch_tun.un_flags | ch->ch_pun.un_flags))); + (old_flags != (ch->ch_tun.un_flags | + ch->ch_pun.un_flags))); else retval = wait_event_interruptible(ch->ch_flags_wait, (old_flags != ch->ch_flags)); @@ -1314,13 +1336,9 @@ static int dgnc_block_til_ready(struct tty_struct *tty, struct file *file, struc spin_unlock_irqrestore(&ch->ch_lock, flags); - if (retval) - return retval; - - return 0; + return retval; } - /* * dgnc_tty_hangup() * @@ -1339,22 +1357,18 @@ static void dgnc_tty_hangup(struct tty_struct *tty) /* flush the transmit queues */ dgnc_tty_flush_buffer(tty); - } - /* * dgnc_tty_close() * */ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) { - struct ktermios *ts; struct dgnc_board *bd; struct channel_t *ch; struct un_t *un; unsigned long flags; - int rc = 0; if (!tty || tty->magic != TTY_MAGIC) return; @@ -1371,8 +1385,6 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) if (!bd || bd->magic != DGNC_BOARD_MAGIC) return; - ts = &tty->termios; - spin_lock_irqsave(&ch->ch_lock, flags); /* @@ -1412,13 +1424,12 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) tty->closing = 1; - /* * Only officially close channel if count is 0 and * DIGI_PRINTER bit is not set. */ - if ((ch->ch_open_count == 0) && !(ch->ch_digi.digi_flags & DIGI_PRINTER)) { - + if ((ch->ch_open_count == 0) && + !(ch->ch_digi.digi_flags & DIGI_PRINTER)) { ch->ch_flags &= ~(CH_STOPI | CH_FORCED_STOPI); /* @@ -1426,7 +1437,7 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) */ if ((un->un_type == DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { dgnc_wmove(ch, ch->ch_digi.digi_offstr, - (int) ch->ch_digi.digi_offlen); + (int)ch->ch_digi.digi_offlen); ch->ch_flags &= ~CH_PRON; } @@ -1434,7 +1445,7 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) /* wait for output to drain */ /* This will also return if we take an interrupt */ - rc = bd->bd_ops->drain(tty, 0); + bd->bd_ops->drain(tty, 0); dgnc_tty_flush_buffer(tty); tty_ldisc_flush(tty); @@ -1447,7 +1458,6 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) * If we have HUPCL set, lower DTR and RTS */ if (ch->ch_c_cflag & HUPCL) { - /* Drop RTS/DTR */ ch->ch_mostat &= ~(UART_MCR_DTR | UART_MCR_RTS); bd->bd_ops->assert_modem_signals(ch); @@ -1474,7 +1484,7 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) */ if ((un->un_type == DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { dgnc_wmove(ch, ch->ch_digi.digi_offstr, - (int) ch->ch_digi.digi_offlen); + (int)ch->ch_digi.digi_offlen); ch->ch_flags &= ~CH_PRON; } } @@ -1488,7 +1498,6 @@ static void dgnc_tty_close(struct tty_struct *tty, struct file *file) spin_unlock_irqrestore(&ch->ch_lock, flags); } - /* * dgnc_tty_chars_in_buffer() * @@ -1507,7 +1516,7 @@ static int dgnc_tty_chars_in_buffer(struct tty_struct *tty) uint chars = 0; unsigned long flags; - if (tty == NULL) + if (!tty) return 0; un = tty->driver_data; @@ -1538,7 +1547,6 @@ static int dgnc_tty_chars_in_buffer(struct tty_struct *tty) return chars; } - /* * dgnc_maxcps_room * @@ -1574,15 +1582,17 @@ static int dgnc_maxcps_room(struct tty_struct *tty, int bytes_available) int cps_limit = 0; unsigned long current_time = jiffies; unsigned long buffer_time = current_time + - (HZ * ch->ch_digi.digi_bufsize) / ch->ch_digi.digi_maxcps; + (HZ * ch->ch_digi.digi_bufsize) / + ch->ch_digi.digi_maxcps; if (ch->ch_cpstime < current_time) { /* buffer is empty */ - ch->ch_cpstime = current_time; /* reset ch_cpstime */ + ch->ch_cpstime = current_time; /* reset ch_cpstime */ cps_limit = ch->ch_digi.digi_bufsize; } else if (ch->ch_cpstime < buffer_time) { /* still room in the buffer */ - cps_limit = ((buffer_time - ch->ch_cpstime) * ch->ch_digi.digi_maxcps) / HZ; + cps_limit = ((buffer_time - ch->ch_cpstime) * + ch->ch_digi.digi_maxcps) / HZ; } else { /* no room in the buffer */ cps_limit = 0; @@ -1594,7 +1604,6 @@ static int dgnc_maxcps_room(struct tty_struct *tty, int bytes_available) return bytes_available; } - /* * dgnc_tty_write_room() * @@ -1610,7 +1619,7 @@ static int dgnc_tty_write_room(struct tty_struct *tty) int ret = 0; unsigned long flags; - if (tty == NULL || dgnc_TmpWriteBuf == NULL) + if (!tty || !dgnc_TmpWriteBuf) return 0; un = tty->driver_data; @@ -1655,7 +1664,6 @@ static int dgnc_tty_write_room(struct tty_struct *tty) return ret; } - /* * dgnc_tty_put_char() * @@ -1672,7 +1680,6 @@ static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c) return 1; } - /* * dgnc_tty_write() * @@ -1680,19 +1687,18 @@ static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c) * In here exists all the Transparent Print magic as well. */ static int dgnc_tty_write(struct tty_struct *tty, - const unsigned char *buf, int count) + const unsigned char *buf, int count) { struct channel_t *ch = NULL; struct un_t *un = NULL; int bufcount = 0, n = 0; - int orig_count = 0; unsigned long flags; ushort head; ushort tail; ushort tmask; uint remain; - if (tty == NULL || dgnc_TmpWriteBuf == NULL) + if (!tty || !dgnc_TmpWriteBuf) return 0; un = tty->driver_data; @@ -1711,7 +1717,6 @@ static int dgnc_tty_write(struct tty_struct *tty, * This helps to figure out if we should ask the FEP * to send us an event when it has more space available. */ - orig_count = count; spin_lock_irqsave(&ch->ch_lock, flags); @@ -1748,7 +1753,7 @@ static int dgnc_tty_write(struct tty_struct *tty, */ if ((un->un_type == DGNC_PRINT) && !(ch->ch_flags & CH_PRON)) { dgnc_wmove(ch, ch->ch_digi.digi_onstr, - (int) ch->ch_digi.digi_onlen); + (int)ch->ch_digi.digi_onlen); head = (ch->ch_w_head) & tmask; ch->ch_flags |= CH_PRON; } @@ -1759,7 +1764,7 @@ static int dgnc_tty_write(struct tty_struct *tty, */ if ((un->un_type != DGNC_PRINT) && (ch->ch_flags & CH_PRON)) { dgnc_wmove(ch, ch->ch_digi.digi_offstr, - (int) ch->ch_digi.digi_offlen); + (int)ch->ch_digi.digi_offlen); head = (ch->ch_w_head) & tmask; ch->ch_flags &= ~CH_PRON; } @@ -1818,7 +1823,6 @@ exit_retry: return 0; } - /* * Return modem signals to ld. */ @@ -1866,7 +1870,6 @@ static int dgnc_tty_tiocmget(struct tty_struct *tty) return result; } - /* * dgnc_tty_tiocmset() * @@ -1874,7 +1877,7 @@ static int dgnc_tty_tiocmget(struct tty_struct *tty) */ static int dgnc_tty_tiocmset(struct tty_struct *tty, - unsigned int set, unsigned int clear) + unsigned int set, unsigned int clear) { struct dgnc_board *bd; struct channel_t *ch; @@ -1918,7 +1921,6 @@ static int dgnc_tty_tiocmset(struct tty_struct *tty, return 0; } - /* * dgnc_tty_send_break() * @@ -1965,10 +1967,8 @@ static int dgnc_tty_send_break(struct tty_struct *tty, int msec) spin_unlock_irqrestore(&ch->ch_lock, flags); return 0; - } - /* * dgnc_tty_wait_until_sent() * @@ -1979,7 +1979,6 @@ static void dgnc_tty_wait_until_sent(struct tty_struct *tty, int timeout) struct dgnc_board *bd; struct channel_t *ch; struct un_t *un; - int rc; if (!tty || tty->magic != TTY_MAGIC) return; @@ -1996,10 +1995,9 @@ static void dgnc_tty_wait_until_sent(struct tty_struct *tty, int timeout) if (!bd || bd->magic != DGNC_BOARD_MAGIC) return; - rc = bd->bd_ops->drain(tty, 0); + bd->bd_ops->drain(tty, 0); } - /* * dgnc_send_xchar() * @@ -2036,9 +2034,6 @@ static void dgnc_tty_send_xchar(struct tty_struct *tty, char c) dev_dbg(tty->dev, "dgnc_tty_send_xchar finish\n"); } - - - /* * Return modem signals to ld. */ @@ -2075,12 +2070,11 @@ static inline int dgnc_get_mstat(struct channel_t *ch) return result; } - - /* * Return modem signals to ld. */ -static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value) +static int dgnc_get_modem_info(struct channel_t *ch, + unsigned int __user *value) { int result; @@ -2095,13 +2089,14 @@ static int dgnc_get_modem_info(struct channel_t *ch, unsigned int __user *value return put_user(result, value); } - /* * dgnc_set_modem_info() * * Set modem signals, called by ld. */ -static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, unsigned int __user *value) +static int dgnc_set_modem_info(struct tty_struct *tty, + unsigned int command, + unsigned int __user *value) { struct dgnc_board *bd; struct channel_t *ch; @@ -2175,7 +2170,6 @@ static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, uns return 0; } - /* * dgnc_tty_digigeta() * @@ -2184,7 +2178,8 @@ static int dgnc_set_modem_info(struct tty_struct *tty, unsigned int command, uns * * */ -static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retinfo) +static int dgnc_tty_digigeta(struct tty_struct *tty, + struct digi_t __user *retinfo) { struct channel_t *ch; struct un_t *un; @@ -2217,7 +2212,6 @@ static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retin return 0; } - /* * dgnc_tty_digiseta() * @@ -2226,7 +2220,8 @@ static int dgnc_tty_digigeta(struct tty_struct *tty, struct digi_t __user *retin * * */ -static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_info) +static int dgnc_tty_digiseta(struct tty_struct *tty, + struct digi_t __user *new_info) { struct dgnc_board *bd; struct channel_t *ch; @@ -2257,17 +2252,21 @@ static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_i /* * Handle transistions to and from RTS Toggle. */ - if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && (new_digi.digi_flags & DIGI_RTS_TOGGLE)) + if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && + (new_digi.digi_flags & DIGI_RTS_TOGGLE)) ch->ch_mostat &= ~(UART_MCR_RTS); - if ((ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && !(new_digi.digi_flags & DIGI_RTS_TOGGLE)) + if ((ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) && + !(new_digi.digi_flags & DIGI_RTS_TOGGLE)) ch->ch_mostat |= (UART_MCR_RTS); /* * Handle transistions to and from DTR Toggle. */ - if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && (new_digi.digi_flags & DIGI_DTR_TOGGLE)) + if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && + (new_digi.digi_flags & DIGI_DTR_TOGGLE)) ch->ch_mostat &= ~(UART_MCR_DTR); - if ((ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && !(new_digi.digi_flags & DIGI_DTR_TOGGLE)) + if ((ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) && + !(new_digi.digi_flags & DIGI_DTR_TOGGLE)) ch->ch_mostat |= (UART_MCR_DTR); memcpy(&ch->ch_digi, &new_digi, sizeof(new_digi)); @@ -2300,11 +2299,11 @@ static int dgnc_tty_digiseta(struct tty_struct *tty, struct digi_t __user *new_i return 0; } - /* * dgnc_set_termios() */ -static void dgnc_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) +static void dgnc_tty_set_termios(struct tty_struct *tty, + struct ktermios *old_termios) { struct dgnc_board *bd; struct channel_t *ch; @@ -2341,7 +2340,6 @@ static void dgnc_tty_set_termios(struct tty_struct *tty, struct ktermios *old_te spin_unlock_irqrestore(&ch->ch_lock, flags); } - static void dgnc_tty_throttle(struct tty_struct *tty) { struct channel_t *ch; @@ -2366,7 +2364,6 @@ static void dgnc_tty_throttle(struct tty_struct *tty) spin_unlock_irqrestore(&ch->ch_lock, flags); } - static void dgnc_tty_unthrottle(struct tty_struct *tty) { struct channel_t *ch; @@ -2391,7 +2388,6 @@ static void dgnc_tty_unthrottle(struct tty_struct *tty) spin_unlock_irqrestore(&ch->ch_lock, flags); } - static void dgnc_tty_start(struct tty_struct *tty) { struct dgnc_board *bd; @@ -2421,7 +2417,6 @@ static void dgnc_tty_start(struct tty_struct *tty) spin_unlock_irqrestore(&ch->ch_lock, flags); } - static void dgnc_tty_stop(struct tty_struct *tty) { struct dgnc_board *bd; @@ -2451,7 +2446,6 @@ static void dgnc_tty_stop(struct tty_struct *tty) spin_unlock_irqrestore(&ch->ch_lock, flags); } - /* * dgnc_tty_flush_chars() * @@ -2494,8 +2488,6 @@ static void dgnc_tty_flush_chars(struct tty_struct *tty) spin_unlock_irqrestore(&ch->ch_lock, flags); } - - /* * dgnc_tty_flush_buffer() * @@ -2540,8 +2532,6 @@ static void dgnc_tty_flush_buffer(struct tty_struct *tty) spin_unlock_irqrestore(&ch->ch_lock, flags); } - - /***************************************************************************** * * The IOCTL function and all of its helpers @@ -2554,14 +2544,14 @@ static void dgnc_tty_flush_buffer(struct tty_struct *tty) * The usual assortment of ioctl's */ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, - unsigned long arg) + unsigned long arg) { struct dgnc_board *bd; struct channel_t *ch; struct un_t *un; int rc; unsigned long flags; - void __user *uarg = (void __user *) arg; + void __user *uarg = (void __user *)arg; if (!tty || tty->magic != TTY_MAGIC) return -ENODEV; @@ -2586,7 +2576,6 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, } switch (cmd) { - /* Here are all the standard ioctl's that we MUST implement */ case TCSBRK: @@ -2617,7 +2606,6 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, return 0; - case TCSBRKP: /* support for POSIX tcsendbreak() * According to POSIX.1 spec (7.2.2.1.2) breaks should be @@ -2668,18 +2656,20 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) arg); + rc = put_user(C_CLOCAL(tty) ? 1 : 0, + (unsigned long __user *)arg); return rc; case TIOCSSOFTCAR: spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = get_user(arg, (unsigned long __user *) arg); + rc = get_user(arg, (unsigned long __user *)arg); if (rc) return rc; spin_lock_irqsave(&ch->ch_lock, flags); - tty->termios.c_cflag = ((tty->termios.c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); + tty->termios.c_cflag = ((tty->termios.c_cflag & ~CLOCAL) | + (arg ? CLOCAL : 0)); ch->ch_bd->bd_ops->param(tty); spin_unlock_irqrestore(&ch->ch_lock, flags); @@ -2728,15 +2718,16 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, ch->ch_bd->bd_ops->flush_uart_write(ch); if (ch->ch_tun.un_flags & (UN_LOW|UN_EMPTY)) { - ch->ch_tun.un_flags &= ~(UN_LOW|UN_EMPTY); + ch->ch_tun.un_flags &= + ~(UN_LOW|UN_EMPTY); wake_up_interruptible(&ch->ch_tun.un_flags_wait); } if (ch->ch_pun.un_flags & (UN_LOW|UN_EMPTY)) { - ch->ch_pun.un_flags &= ~(UN_LOW|UN_EMPTY); + ch->ch_pun.un_flags &= + ~(UN_LOW|UN_EMPTY); wake_up_interruptible(&ch->ch_pun.un_flags_wait); } - } } @@ -2797,7 +2788,6 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, /* set information for ditty */ if (cmd == (DIGI_SETAW)) { - spin_unlock_irqrestore(&ch->ch_lock, flags); rc = ch->ch_bd->bd_ops->drain(tty, 0); @@ -2817,9 +2807,11 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, case DIGI_LOOPBACK: { uint loopback = 0; - /* Let go of locks when accessing user space, could sleep */ + /* Let go of locks when accessing user space, + * could sleep + */ spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = get_user(loopback, (unsigned int __user *) arg); + rc = get_user(loopback, (unsigned int __user *)arg); if (rc) return rc; spin_lock_irqsave(&ch->ch_lock, flags); @@ -2837,7 +2829,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, case DIGI_GETCUSTOMBAUD: spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = put_user(ch->ch_custom_speed, (unsigned int __user *) arg); + rc = put_user(ch->ch_custom_speed, (unsigned int __user *)arg); return rc; case DIGI_SETCUSTOMBAUD: @@ -2845,7 +2837,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, int new_rate; /* Let go of locks when accessing user space, could sleep */ spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = get_user(new_rate, (int __user *) arg); + rc = get_user(new_rate, (int __user *)arg); if (rc) return rc; spin_lock_irqsave(&ch->ch_lock, flags); @@ -2867,7 +2859,7 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned char c; spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = get_user(c, (unsigned char __user *) arg); + rc = get_user(c, (unsigned char __user *)arg); if (rc) return rc; spin_lock_irqsave(&ch->ch_lock, flags); @@ -2915,14 +2907,16 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd, /* NOTE: MORE EVENTS NEEDS TO BE ADDED HERE */ if (ch->ch_flags & CH_BREAK_SENDING) events |= EV_TXB; - if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP)) + if ((ch->ch_flags & CH_STOP) || + (ch->ch_flags & CH_FORCED_STOP)) events |= (EV_OPU | EV_OPS); - if ((ch->ch_flags & CH_STOPI) || (ch->ch_flags & CH_FORCED_STOPI)) + if ((ch->ch_flags & CH_STOPI) || + (ch->ch_flags & CH_FORCED_STOPI)) events |= (EV_IPU | EV_IPS); spin_unlock_irqrestore(&ch->ch_lock, flags); - rc = put_user(events, (unsigned int __user *) arg); + rc = put_user(events, (unsigned int __user *)arg); return rc; } |