* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
- * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE!
+ * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE!
*
* This is shared code between Digi's CVS archive and the
* Linux Kernel sources.
* Changing the source just for reformatting needlessly breaks
* our CVS diff history.
*
- * Send any bug fixes/changes to: Eng.Linux at digi dot com.
- * Thank you.
+ * Send any bug fixes/changes to: Eng.Linux at digi dot com.
+ * Thank you.
*/
/************************************************************************
- *
+ *
* This file implements the tty driver functionality for the
* FEP5 based product lines.
- *
+ *
************************************************************************
*
* $Id: dgap_tty.c,v 1.3 2011/06/23 12:11:31 markh Exp $
.flush_chars = dgap_tty_flush_chars,
.ioctl = dgap_tty_ioctl,
.set_termios = dgap_tty_set_termios,
- .stop = dgap_tty_stop,
+ .stop = dgap_tty_stop,
.start = dgap_tty_start,
.throttle = dgap_tty_throttle,
.unthrottle = dgap_tty_unthrottle,
/************************************************************************
- *
+ *
* TTY Initialization/Cleanup Functions
- *
+ *
************************************************************************/
-
+
/*
* dgap_tty_preinit()
*
{
unsigned long flags;
- DGAP_LOCK(dgap_global_lock, flags);
+ DGAP_LOCK(dgap_global_lock, flags);
/*
* Allocate a buffer for doing the copy from user space to
DPR_INIT(("unable to allocate tmp write buf"));
return (-ENOMEM);
}
-
+
DGAP_UNLOCK(dgap_global_lock, flags);
return(0);
}
brd->SerialDriver->name_base = 0;
brd->SerialDriver->major = 0;
brd->SerialDriver->minor_start = 0;
- brd->SerialDriver->type = TTY_DRIVER_TYPE_SERIAL;
- brd->SerialDriver->subtype = SERIAL_TYPE_NORMAL;
+ brd->SerialDriver->type = TTY_DRIVER_TYPE_SERIAL;
+ brd->SerialDriver->subtype = SERIAL_TYPE_NORMAL;
brd->SerialDriver->init_termios = DgapDefaultTermios;
brd->SerialDriver->driver_name = DRVSTR;
brd->SerialDriver->flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK);
brd->PrintDriver->name_base = 0;
brd->PrintDriver->major = 0;
brd->PrintDriver->minor_start = 0;
- brd->PrintDriver->type = TTY_DRIVER_TYPE_SERIAL;
+ brd->PrintDriver->type = TTY_DRIVER_TYPE_SERIAL;
brd->PrintDriver->subtype = SERIAL_TYPE_NORMAL;
brd->PrintDriver->init_termios = DgapDefaultTermios;
brd->PrintDriver->driver_name = DRVSTR;
/*
* Set queue water marks, interrupt mask,
- * and general tty parameters.
+ * and general tty parameters.
*/
ch->ch_tlw = tlw = ch->ch_tsize >= 2000 ? ((ch->ch_tsize * 5) / 8) : ch->ch_tsize / 2;
writew(0, &(ch->ch_bs->edelay));
else
writew(100, &(ch->ch_bs->edelay));
-
+
writeb(1, &(ch->ch_bs->idata));
}
* dgap_tty_uninit()
*
* Uninitialize the TTY portion of this driver. Free all memory and
- * resources.
+ * resources.
*/
void dgap_tty_uninit(struct board_t *brd)
{
if (n == 0) {
return;
}
-
+
/*
* Copy as much data as will fit.
*/
/*=======================================================================
*
* dgap_input - Process received data.
- *
+ *
* ch - Pointer to channel structure.
- *
+ *
*=======================================================================*/
void dgap_input(struct channel_t *ch)
DGAP_LOCK(bd->bd_lock, lock_flags);
DGAP_LOCK(ch->ch_lock, lock_flags2);
- /*
- * Figure the number of characters in the buffer.
+ /*
+ * Figure the number of characters in the buffer.
* Exit immediately if none.
*/
len = min(len, (N_TTY_BUF_SIZE - 1));
ld = tty_ldisc_ref(tp);
-
+
#ifdef TTY_DONT_FLIP
/*
* If the DONT_FLIP flag is on, don't flush our buffer, and act
- * like the ld doesn't have any space to put the data right now.
+ * like the ld doesn't have any space to put the data right now.
*/
- if (test_bit(TTY_DONT_FLIP, &tp->flags))
+ if (test_bit(TTY_DONT_FLIP, &tp->flags))
len = 0;
#endif
}
-/************************************************************************
+/************************************************************************
* Determines when CARRIER changes state and takes appropriate
- * action.
+ * action.
************************************************************************/
void dgap_carrier(struct channel_t *ch)
{
int virt_carrier = 0;
int phys_carrier = 0;
-
+
DPR_CARR(("dgap_carrier called...\n"));
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
if (ch->ch_digi.digi_flags & DIGI_FORCEDCD) {
virt_carrier = 1;
- }
+ }
if (ch->ch_c_cflag & CLOCAL) {
virt_carrier = 1;
- }
+ }
DPR_CARR(("DCD: physical: %d virt: %d\n", phys_carrier, virt_carrier));
* "make pretend that carrier is there".
*/
if ((virt_carrier == 0) && ((ch->ch_flags & CH_CD) != 0) &&
- (phys_carrier == 0))
+ (phys_carrier == 0))
{
/*
tty_hangup(ch->ch_tun.un_tty);
}
- if (ch->ch_pun.un_open_count > 0) {
+ if (ch->ch_pun.un_open_count > 0) {
DPR_CARR(("Sending pr hangup\n"));
tty_hangup(ch->ch_pun.un_tty);
}
*/
if (virt_carrier == 1)
ch->ch_flags |= CH_FCAR;
- else
+ else
ch->ch_flags &= ~CH_FCAR;
if (phys_carrier == 1)
/************************************************************************
- *
+ *
* TTY Entry points and helper functions
- *
+ *
************************************************************************/
/*
*/
dgap_param(tty);
- /*
+ /*
* follow protocol for opening port
*/
}
-/*
+/*
* dgap_block_til_ready()
*
* Wait for DCD, if needed.
*/
static int dgap_block_til_ready(struct tty_struct *tty, struct file *file, struct channel_t *ch)
-{
+{
int retval = 0;
struct un_t *un = NULL;
ulong lock_flags;
* If either unit is in the middle of the fragile part of close,
* we just cannot touch the channel safely.
* Go back to sleep, knowing that when the channel can be
- * touched safely, the close routine will signal the
+ * 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)) {
* dgap_tty_hangup()
*
* Hangup the port. Like a close, but don't wait for output to drain.
- */
+ */
static void dgap_tty_hangup(struct tty_struct *tty)
{
struct board_t *bd;
*/
APR(("tty->count is 1, un open count is %d\n", un->un_open_count));
un->un_open_count = 1;
- }
+ }
if (--un->un_open_count < 0) {
APR(("bad serial port open count of %d\n", un->un_open_count));
dgap_cmdb( ch, SMODEM, 0, D_DTR(ch)|D_RTS(ch), 0 );
/*
- * Go to sleep to ensure RTS/DTR
+ * Go to sleep to ensure RTS/DTR
* have been dropped for modems to see it.
*/
if (ch->ch_close_delay) {
wake_up_interruptible(&un->un_flags_wait);
DGAP_UNLOCK(ch->ch_lock, lock_flags);
-
+
DPR_BASIC(("dgap_tty_close - complete\n"));
}
}
}
- DPR_WRITE(("dgap_tty_chars_in_buffer. Port: %x - %d (head: %d tail: %d tsize: %d)\n",
+ DPR_WRITE(("dgap_tty_chars_in_buffer. Port: %x - %d (head: %d tail: %d tsize: %d)\n",
ch->ch_portnum, chars, thead, ttail, ch->ch_tsize));
return(chars);
}
}
-/*
+/*
* dgap_maxcps_room
*
* Reduces bytes_available to the max number of characters
* that can be sent currently given the maxcps value, and
* returns the new bytes_available. This only affects printer
* output.
- */
+ */
static int dgap_maxcps_room(struct tty_struct *tty, int bytes_available)
{
struct channel_t *ch = NULL;
}
else {
/* no room in the buffer */
- cps_limit = 0;
+ cps_limit = 0;
}
bytes_available = min(cps_limit, bytes_available);
* dgap_tty_write_room()
*
* Return space available in Tx buffer
- */
+ */
static int dgap_tty_write_room(struct tty_struct *tty)
{
struct channel_t *ch = NULL;
ret = dgap_maxcps_room(tty, ret);
/*
- * If we are printer device, leave space for
+ * If we are printer device, leave space for
* possibly both the on and off strings.
*/
if (un->un_type == DGAP_PRINT) {
*/
dgap_set_firmware_event(un, UN_LOW | UN_EMPTY);
DGAP_UNLOCK(ch->ch_lock, lock_flags);
-
+
DPR_WRITE(("dgap_tty_write_room - %d tail: %d head: %d\n", ret, tail, head));
return(ret);
* dgap_tty_put_char()
*
* Put a character into ch->ch_buf
- *
+ *
* - used by the line discipline for OPOST processing
*/
static int dgap_tty_put_char(struct tty_struct *tty, unsigned char c)
if (from_user) {
DGAP_UNLOCK(ch->ch_lock, lock_flags);
up(&dgap_TmpWriteSem);
- }
+ }
else {
DGAP_UNLOCK(ch->ch_lock, lock_flags);
}
if (set & TIOCM_RTS) {
ch->ch_mforce |= D_RTS(ch);
ch->ch_mval |= D_RTS(ch);
- }
+ }
if (set & TIOCM_DTR) {
ch->ch_mforce |= D_DTR(ch);
ch->ch_mval |= D_DTR(ch);
- }
+ }
if (clear & TIOCM_RTS) {
ch->ch_mforce |= D_RTS(ch);
/*
* dgap_send_xchar()
- *
+ *
* send a high priority character, called by ld.
*/
static void dgap_tty_send_xchar(struct tty_struct *tty, char c)
/*
- * dgap_tty_digigeta()
+ * dgap_tty_digigeta()
*
* Ioctl to get the information for ditty.
*
/*
- * dgap_tty_digiseta()
+ * dgap_tty_digiseta()
*
* Ioctl to set the information for ditty.
*
memcpy(&ch->ch_digi, &new_digi, sizeof(struct digi_t));
- if (ch->ch_digi.digi_maxcps < 1)
+ if (ch->ch_digi.digi_maxcps < 1)
ch->ch_digi.digi_maxcps = 1;
- if (ch->ch_digi.digi_maxcps > 10000)
+ if (ch->ch_digi.digi_maxcps > 10000)
ch->ch_digi.digi_maxcps = 10000;
if (ch->ch_digi.digi_bufsize < 10)
/*
- * dgap_tty_digigetedelay()
+ * dgap_tty_digigetedelay()
*
* Ioctl to get the current edelay setting.
*
/*
- * dgap_tty_digisetedelay()
+ * dgap_tty_digisetedelay()
*
* Ioctl to set the EDELAY setting
*
/*
- * dgap_tty_digisetcustombaud()
+ * dgap_tty_digisetcustombaud()
*
* Ioctl to set the custom baud rate setting
*/
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
-
+
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
-
+
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
-
+
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
-
+
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
}
-/*
+/*
* dgap_tty_flush_chars()
*
* Flush the cook buffer
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
-
+
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
/*
* dgap_tty_flush_buffer()
- *
+ *
* Flush Tx buffer (make in == out)
*/
static void dgap_tty_flush_buffer(struct tty_struct *tty)
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
-
+
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
* The IOCTL function and all of its helpers
*
*****************************************************************************/
-
+
/*
* dgap_tty_ioctl()
*
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return (-ENODEV);
- DPR_IOCTL(("dgap_tty_ioctl start on port %d - cmd %s (%x), arg %lx\n",
+ DPR_IOCTL(("dgap_tty_ioctl start on port %d - cmd %s (%x), arg %lx\n",
ch->ch_portnum, dgap_ioctl_name(cmd), cmd, arg));
DGAP_LOCK(bd->bd_lock, lock_flags);
case TCSBRK:
/*
- * TCSBRK is SVID version: non-zero arg --> no break
+ * TCSBRK is SVID version: non-zero arg --> no break
* this behaviour is exploited by tcdrain().
*
* According to POSIX.1 spec (7.2.2.1.2) breaks should be
DGAP_UNLOCK(ch->ch_lock, lock_flags2);
DGAP_UNLOCK(bd->bd_lock, lock_flags);
- DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
+ DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
ch->ch_portnum, dgap_ioctl_name(cmd), cmd, arg));
return(0);
DGAP_UNLOCK(ch->ch_lock, lock_flags2);
DGAP_UNLOCK(bd->bd_lock, lock_flags);
- DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
+ DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
ch->ch_portnum, dgap_ioctl_name(cmd), cmd, arg));
return(0);
DGAP_UNLOCK(ch->ch_lock, lock_flags2);
DGAP_UNLOCK(bd->bd_lock, lock_flags);
- DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
+ DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
ch->ch_portnum, dgap_ioctl_name(cmd), cmd, arg));
return 0;
-
+
case TIOCCBRK:
/*
* FEP5 doesn't support turning off a break unconditionally.
DGAP_UNLOCK(bd->bd_lock, lock_flags);
return(0);
-
+
case TIOCMGET:
DGAP_UNLOCK(ch->ch_lock, lock_flags2);
DGAP_UNLOCK(bd->bd_lock, lock_flags);
/*
* Here are any additional ioctl's that we want to implement
*/
-
- case TCFLSH:
+
+ case TCFLSH:
/*
* The linux tty driver doesn't have a flush
* input routine for the driver, assuming all backed
* act on the ioctl, but then lie and say we didn't
* so the line discipline will process the flush
* also.
- */
+ */
rc = tty_check_change(tty);
if (rc) {
DGAP_UNLOCK(ch->ch_lock, lock_flags2);
tty_wakeup(tty);
DGAP_LOCK(bd->bd_lock, lock_flags);
DGAP_LOCK(ch->ch_lock, lock_flags2);
- }
+ }
- /* pretend we didn't recognize this IOCTL */
+ /* pretend we didn't recognize this IOCTL */
DGAP_UNLOCK(ch->ch_lock, lock_flags2);
DGAP_UNLOCK(bd->bd_lock, lock_flags);
- DPR_IOCTL(("dgap_tty_ioctl (LINE:%d) finish on port %d - cmd %s (%x), arg %lx\n",
+ DPR_IOCTL(("dgap_tty_ioctl (LINE:%d) finish on port %d - cmd %s (%x), arg %lx\n",
__LINE__, ch->ch_portnum, dgap_ioctl_name(cmd), cmd, arg));
return(-ENOIOCTLCMD);
return(-EINTR);
}
- DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
+ DPR_IOCTL(("dgap_tty_ioctl finish on port %d - cmd %s (%x), arg %lx\n",
ch->ch_portnum, dgap_ioctl_name(cmd), cmd, arg));
/* pretend we didn't recognize this */
}
/* pretend we didn't recognize this */
- return(-ENOIOCTLCMD);
+ return(-ENOIOCTLCMD);
case TCXONC:
/*
DGAP_UNLOCK(bd->bd_lock, lock_flags);
DPR_IOCTL(("dgap_tty_ioctl - in default\n"));
- DPR_IOCTL(("dgap_tty_ioctl end - cmd %s (%x), arg %lx\n",
+ DPR_IOCTL(("dgap_tty_ioctl end - cmd %s (%x), arg %lx\n",
dgap_ioctl_name(cmd), cmd, arg));
return(-ENOIOCTLCMD);
projects / platform / kernel / linux-exynos.git / commitdiff