* PURPOSE. See the GNU General Public License for more details.
*/
-/************************************************************************
- *
+/*
* This file implements the tty driver functionality for the
* Neo and ClassicBoard PCI based product lines.
- *
- ************************************************************************
- *
*/
#include <linux/kernel.h>
#include "dgnc_sysfs.h"
#include "dgnc_utils.h"
-/*
- * Default transparent print information.
- */
+/* Default transparent print information. */
+
static const struct digi_t dgnc_digi_init = {
- .digi_flags = DIGI_COOK, /* Flags */
- .digi_maxcps = 100, /* Max CPS */
- .digi_maxchar = 50, /* Max chars in print queue */
- .digi_bufsize = 100, /* Printer buffer size */
- .digi_onlen = 4, /* size of printer on string */
- .digi_offlen = 4, /* size of printer off string */
- .digi_onstr = "\033[5i", /* ANSI printer on string ] */
- .digi_offstr = "\033[4i", /* ANSI printer off string ] */
- .digi_term = "ansi" /* default terminal type */
+ .digi_flags = DIGI_COOK, /* Flags */
+ .digi_maxcps = 100, /* Max CPS */
+ .digi_maxchar = 50, /* Max chars in print queue */
+ .digi_bufsize = 100, /* Printer buffer size */
+ .digi_onlen = 4, /* size of printer on string */
+ .digi_offlen = 4, /* size of printer off string */
+ .digi_onstr = "\033[5i", /* ANSI printer on string ] */
+ .digi_offstr = "\033[4i", /* ANSI printer off string ] */
+ .digi_term = "ansi" /* default terminal type */
};
/*
.send_xchar = dgnc_tty_send_xchar
};
-/************************************************************************
- *
- * TTY Initialization/Cleanup Functions
- *
- ************************************************************************/
+/* TTY Initialization/Cleanup Functions */
/*
* dgnc_tty_register()
if (!brd)
return -ENXIO;
- /*
- * Initialize board structure elements.
- */
+ /* Initialize board structure elements. */
vaddr = brd->re_map_membase;
}
if (n > 0) {
- /*
- * Move rest of data.
- */
+
+ /* Move rest of data. */
+
remain = n;
memcpy(ch->ch_wqueue + head, buf, remain);
head += remain;
goto exit_unlock;
}
- /*
- * If we are throttled, simply don't read any data.
- */
+ /* If we are throttled, simply don't read any data. */
+
if (ch->ch_flags & CH_FORCED_STOPI)
goto exit_unlock;
tty_ldisc_deref(ld);
}
-/************************************************************************
+/*
* Determines when CARRIER changes state and takes appropriate
* action.
- ************************************************************************/
+ */
void dgnc_carrier(struct channel_t *ch)
{
int virt_carrier = 0;
if (ch->ch_c_cflag & CLOCAL)
virt_carrier = 1;
- /*
- * Test for a VIRTUAL carrier transition to HIGH.
- */
+ /* 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
wake_up_interruptible(&ch->ch_flags_wait);
}
- /*
- * Test for a PHYSICAL carrier transition to HIGH.
- */
+ /* 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
tty_hangup(ch->ch_pun.un_tty);
}
- /*
- * Make sure that our cached values reflect the current reality.
- */
+ /* Make sure that our cached values reflect the current reality. */
+
if (virt_carrier == 1)
ch->ch_flags |= CH_FCAR;
else
ch->ch_flags &= ~CH_CD;
}
-/*
- * Assign the custom baud rate to the channel structure
- */
+/* Assign the custom baud rate to the channel structure */
+
static void dgnc_set_custom_speed(struct channel_t *ch, uint newrate)
{
int testdiv;
spin_lock_irqsave(&ch->ch_lock, flags);
- /*
- * If channel now has space, wake up anyone waiting on the condition.
- */
+ /* If channel now has space, wake up anyone waiting on the condition. */
+
qlen = ch->ch_w_head - ch->ch_w_tail;
if (qlen < 0)
qlen += WQUEUESIZE;
return NULL;
}
-/************************************************************************
- *
- * TTY Entry points and helper functions
- *
- ************************************************************************/
+/* TTY Entry points and helper functions */
+
+/* dgnc_tty_open() */
-/*
- * dgnc_tty_open()
- *
- */
static int dgnc_tty_open(struct tty_struct *tty, struct file *file)
{
struct dgnc_board *brd;
/* Store our unit into driver_data, so we always have it available. */
tty->driver_data = un;
- /*
- * Initialize tty's
- */
+ /* Initialize tty's */
+
if (!(un->un_flags & UN_ISOPEN)) {
/* Store important variables. */
un->un_tty = tty;
ch->ch_flags &= ~(CH_OPENING);
wake_up_interruptible(&ch->ch_flags_wait);
- /*
- * Initialize if neither terminal or printer is open.
- */
+ /* Initialize if neither terminal or printer is open. */
+
if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_ISOPEN)) {
- /*
- * Flush input queues.
- */
+
+ /* Flush input queues. */
+
ch->ch_r_head = 0;
ch->ch_r_tail = 0;
ch->ch_e_head = 0;
brd->bd_ops->uart_init(ch);
}
- /*
- * Run param in case we changed anything
- */
+ /* Run param in case we changed anything */
+
brd->bd_ops->param(tty);
dgnc_carrier(ch);
- /*
- * follow protocol for opening port
- */
+ /* follow protocol for opening port */
spin_unlock_irqrestore(&ch->ch_lock, flags);
break;
}
- /*
- * Store the flags before we let go of channel lock
- */
+ /* Store the flags before we let go of channel lock */
+
if (sleep_on_un_flags)
old_flags = ch->ch_tun.un_flags | ch->ch_pun.un_flags;
else
dgnc_tty_flush_buffer(tty);
}
-/*
- * dgnc_tty_close()
- *
- */
+/* dgnc_tty_close() */
+
static void dgnc_tty_close(struct tty_struct *tty, struct file *file)
{
struct dgnc_board *bd;
!(ch->ch_digi.digi_flags & DIGI_PRINTER)) {
ch->ch_flags &= ~(CH_STOPI | CH_FORCED_STOPI);
- /*
- * turn off print device when closing print device.
- */
+ /* turn off print device when closing print device. */
+
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);
tty->closing = 0;
- /*
- * If we have HUPCL set, lower DTR and RTS
- */
+ /* 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);
/* Turn off UART interrupts for this port */
ch->ch_bd->bd_ops->uart_off(ch);
} else {
- /*
- * turn off print device when closing print device.
- */
+ /* turn off print device when closing print device. */
+
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);
*/
static int dgnc_tty_put_char(struct tty_struct *tty, unsigned char c)
{
- /*
- * Simply call tty_write.
- */
+ /* Simply call tty_write. */
+
dgnc_tty_write(tty, &c, 1);
return 1;
}
*/
count = min(count, bufcount);
- /*
- * Bail if no space left.
- */
+ /* Bail if no space left. */
+
if (count <= 0)
goto exit_retry;
}
if (n > 0) {
- /*
- * Move rest of data.
- */
+
+ /* Move rest of data. */
+
remain = n;
memcpy(ch->ch_wqueue + head, buf, remain);
head += remain;
return 0;
}
-/*
- * Return modem signals to ld.
- */
+/* Return modem signals to ld. */
static int dgnc_tty_tiocmget(struct tty_struct *tty)
{
dev_dbg(tty->dev, "dgnc_tty_send_xchar finish\n");
}
-/*
- * Return modem signals to ld.
- */
+/* Return modem signals to ld. */
+
static inline int dgnc_get_mstat(struct channel_t *ch)
{
unsigned char mstat;
return result;
}
-/*
- * Return modem signals to ld.
- */
+/* Return modem signals to ld. */
+
static int dgnc_get_modem_info(struct channel_t *ch,
unsigned int __user *value)
{
* dgnc_tty_digigeta()
*
* Ioctl to get the information for ditty.
- *
- *
- *
*/
static int dgnc_tty_digigeta(struct tty_struct *tty,
struct digi_t __user *retinfo)
* dgnc_tty_digiseta()
*
* Ioctl to set the information for ditty.
- *
- *
- *
*/
static int dgnc_tty_digiseta(struct tty_struct *tty,
struct digi_t __user *new_info)
spin_lock_irqsave(&ch->ch_lock, flags);
- /*
- * Handle transistions to and from RTS Toggle.
- */
+ /* Handle transistions to and from RTS Toggle. */
+
if (!(ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) &&
(new_digi.digi_flags & DIGI_RTS_TOGGLE))
ch->ch_mostat &= ~(UART_MCR_RTS);
!(new_digi.digi_flags & DIGI_RTS_TOGGLE))
ch->ch_mostat |= (UART_MCR_RTS);
- /*
- * Handle transistions to and from DTR Toggle.
- */
+ /* Handle transistions to and from DTR Toggle. */
+
if (!(ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE) &&
(new_digi.digi_flags & DIGI_DTR_TOGGLE))
ch->ch_mostat &= ~(UART_MCR_DTR);
return 0;
}
-/*
- * dgnc_set_termios()
- */
+/* dgnc_set_termios() */
+
static void dgnc_tty_set_termios(struct tty_struct *tty,
struct ktermios *old_termios)
{
spin_unlock_irqrestore(&ch->ch_lock, flags);
}
-/*****************************************************************************
- *
- * The IOCTL function and all of its helpers
- *
- *****************************************************************************/
+/* The IOCTL function and all of its helpers */
/*
* dgnc_tty_ioctl()
return 0;
case TCSBRKP:
- /* support for POSIX tcsendbreak()
+ /*
+ * support for POSIX tcsendbreak()
* According to POSIX.1 spec (7.2.2.1.2) breaks should be
* between 0.25 and 0.5 seconds so we'll ask for something
* in the middle: 0.375 seconds.
spin_unlock_irqrestore(&ch->ch_lock, flags);
return dgnc_set_modem_info(ch, cmd, uarg);
- /*
- * Here are any additional ioctl's that we want to implement
- */
+ /* Here are any additional ioctl's that we want to implement */
case TCFLSH:
/*
case DIGI_LOOPBACK:
{
uint loopback = 0;
- /* Let go of locks when accessing user space,
+ /*
+ * Let go of locks when accessing user space,
* could sleep
*/
spin_unlock_irqrestore(&ch->ch_lock, flags);
spin_unlock_irqrestore(&ch->ch_lock, flags);
- /*
- * Get data from user first.
- */
+ /* Get data from user first. */
+
if (copy_from_user(&buf, uarg, sizeof(buf)))
return -EFAULT;
spin_lock_irqsave(&ch->ch_lock, flags);
- /*
- * Figure out how much data is in our RX and TX queues.
- */
+ /* Figure out how much data is in our RX and TX queues. */
+
buf.rxbuf = (ch->ch_r_head - ch->ch_r_tail) & RQUEUEMASK;
buf.txbuf = (ch->ch_w_head - ch->ch_w_tail) & WQUEUEMASK;
- /*
- * Is the UART empty? Add that value to whats in our TX queue.
- */
+ /* Is the UART empty? Add that value to whats in our TX queue. */
+
count = buf.txbuf + ch_bd_ops->get_uart_bytes_left(ch);
/*
if (buf.txbuf > tdist)
buf.txbuf = tdist;
- /*
- * Report whether our queue and UART TX are completely empty.
- */
+ /* Report whether our queue and UART TX are completely empty. */
+
if (count)
buf.txdone = 0;
else
projects / openwrt / staging / blogic.git / commitdiff