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Date: Mon, 19 May 2008 15:50:24 +0100
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: linux-kernel@...r.kernel.org, akpm@...l.org, greg@...ah.com
Subject: [PATCH 03/20] epca: use tty_port
From: Alan Cox <alan@...hat.com>
Switch the EPCA driver to include and begin using a tty_port structure
---
drivers/char/epca.c | 106 ++++++++++++++++++++++++++-------------------------
drivers/char/epca.h | 7 ---
2 files changed, 54 insertions(+), 59 deletions(-)
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 60a4df7..d26752b 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -432,7 +432,7 @@ static void pc_close(struct tty_struct *tty, struct file *filp)
spin_unlock_irqrestore(&epca_lock, flags);
return;
}
- if (ch->count-- > 1) {
+ if (ch->port.count-- > 1) {
/* Begin channel is open more than once */
/*
* Return without doing anything. Someone might still
@@ -442,19 +442,19 @@ static void pc_close(struct tty_struct *tty, struct file *filp)
return;
}
/* Port open only once go ahead with shutdown & reset */
- BUG_ON(ch->count < 0);
+ BUG_ON(ch->port.count < 0);
/*
* Let the rest of the driver know the channel is being closed.
* This becomes important if an open is attempted before close
* is finished.
*/
- ch->asyncflags |= ASYNC_CLOSING;
+ ch->port.flags |= ASYNC_CLOSING;
tty->closing = 1;
spin_unlock_irqrestore(&epca_lock, flags);
- if (ch->asyncflags & ASYNC_INITIALIZED) {
+ if (ch->port.flags & ASYNC_INITIALIZED) {
/* Setup an event to indicate when the
transmit buffer empties */
setup_empty_event(tty, ch);
@@ -469,17 +469,17 @@ static void pc_close(struct tty_struct *tty, struct file *filp)
spin_lock_irqsave(&epca_lock, flags);
tty->closing = 0;
ch->event = 0;
- ch->tty = NULL;
+ ch->port.tty = NULL;
spin_unlock_irqrestore(&epca_lock, flags);
- if (ch->blocked_open) {
+ if (ch->port.blocked_open) {
if (ch->close_delay)
msleep_interruptible(jiffies_to_msecs(ch->close_delay));
- wake_up_interruptible(&ch->open_wait);
+ wake_up_interruptible(&ch->port.open_wait);
}
- ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
+ ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
ASYNC_CLOSING);
- wake_up_interruptible(&ch->close_wait);
+ wake_up_interruptible(&ch->port.close_wait);
}
}
@@ -489,7 +489,7 @@ static void shutdown(struct channel *ch)
struct tty_struct *tty;
struct board_chan __iomem *bc;
- if (!(ch->asyncflags & ASYNC_INITIALIZED))
+ if (!(ch->port.flags & ASYNC_INITIALIZED))
return;
spin_lock_irqsave(&epca_lock, flags);
@@ -504,7 +504,7 @@ static void shutdown(struct channel *ch)
*/
if (bc)
writeb(0, &bc->idata);
- tty = ch->tty;
+ tty = ch->port.tty;
/* If we're a modem control device and HUPCL is on, drop RTS & DTR. */
if (tty->termios->c_cflag & HUPCL) {
@@ -518,7 +518,7 @@ static void shutdown(struct channel *ch)
* will have to reinitialized. Set a flag to indicate this.
*/
/* Prevent future Digi programmed interrupts from coming active */
- ch->asyncflags &= ~ASYNC_INITIALIZED;
+ ch->port.flags &= ~ASYNC_INITIALIZED;
spin_unlock_irqrestore(&epca_lock, flags);
}
@@ -538,12 +538,12 @@ static void pc_hangup(struct tty_struct *tty)
shutdown(ch);
spin_lock_irqsave(&epca_lock, flags);
- ch->tty = NULL;
+ ch->port.tty = NULL;
ch->event = 0;
- ch->count = 0;
- ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
+ ch->port.count = 0;
+ ch->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
spin_unlock_irqrestore(&epca_lock, flags);
- wake_up_interruptible(&ch->open_wait);
+ wake_up_interruptible(&ch->port.open_wait);
}
}
@@ -795,7 +795,7 @@ static int block_til_ready(struct tty_struct *tty,
unsigned long flags;
if (tty_hung_up_p(filp)) {
- if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+ if (ch->port.flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
@@ -806,10 +806,10 @@ static int block_til_ready(struct tty_struct *tty,
* If the device is in the middle of being closed, then block until
* it's done, and then try again.
*/
- if (ch->asyncflags & ASYNC_CLOSING) {
- interruptible_sleep_on(&ch->close_wait);
+ if (ch->port.flags & ASYNC_CLOSING) {
+ interruptible_sleep_on(&ch->port.close_wait);
- if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+ if (ch->port.flags & ASYNC_HUP_NOTIFY)
return -EAGAIN;
else
return -ERESTARTSYS;
@@ -820,7 +820,7 @@ static int block_til_ready(struct tty_struct *tty,
* If non-blocking mode is set, then make the check up front
* and then exit.
*/
- ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
+ ch->port.flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
if (tty->termios->c_cflag & CLOCAL)
@@ -828,24 +828,24 @@ static int block_til_ready(struct tty_struct *tty,
/* Block waiting for the carrier detect and the line to become free */
retval = 0;
- add_wait_queue(&ch->open_wait, &wait);
+ add_wait_queue(&ch->port.open_wait, &wait);
spin_lock_irqsave(&epca_lock, flags);
/* We dec count so that pc_close will know when to free things */
if (!tty_hung_up_p(filp))
- ch->count--;
- ch->blocked_open++;
+ ch->port.count--;
+ ch->port.blocked_open++;
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
- !(ch->asyncflags & ASYNC_INITIALIZED)) {
- if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+ !(ch->port.flags & ASYNC_INITIALIZED)) {
+ if (ch->port.flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
break;
}
- if (!(ch->asyncflags & ASYNC_CLOSING) &&
+ if (!(ch->port.flags & ASYNC_CLOSING) &&
(do_clocal || (ch->imodem & ch->dcd)))
break;
if (signal_pending(current)) {
@@ -864,17 +864,17 @@ static int block_til_ready(struct tty_struct *tty,
}
__set_current_state(TASK_RUNNING);
- remove_wait_queue(&ch->open_wait, &wait);
+ remove_wait_queue(&ch->port.open_wait, &wait);
if (!tty_hung_up_p(filp))
- ch->count++;
- ch->blocked_open--;
+ ch->port.count++;
+ ch->port.blocked_open--;
spin_unlock_irqrestore(&epca_lock, flags);
if (retval)
return retval;
- ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
+ ch->port.flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
@@ -933,7 +933,7 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
* necessary because we do not wish to flush and shutdown the channel
* until the last app holding the channel open, closes it.
*/
- ch->count++;
+ ch->port.count++;
/*
* Set a kernel structures pointer to our local channel structure. This
* way we can get to it when passed only a tty struct.
@@ -957,14 +957,14 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
writew(head, &bc->rout);
/* Set the channels associated tty structure */
- ch->tty = tty;
+ ch->port.tty = tty;
/*
* The below routine generally sets up parity, baud, flow control
* issues, etc.... It effect both control flags and input flags.
*/
epcaparam(tty, ch);
- ch->asyncflags |= ASYNC_INITIALIZED;
+ ch->port.flags |= ASYNC_INITIALIZED;
memoff(ch);
spin_unlock_irqrestore(&epca_lock, flags);
@@ -976,7 +976,7 @@ static int pc_open(struct tty_struct *tty, struct file *filp)
* waiting for the line...
*/
spin_lock_irqsave(&epca_lock, flags);
- ch->tty = tty;
+ ch->port.tty = tty;
globalwinon(ch);
/* Enable Digi Data events */
writeb(1, &bc->idata);
@@ -1017,8 +1017,8 @@ static void __exit epca_module_exit(void)
}
ch = card_ptr[crd];
for (count = 0; count < bd->numports; count++, ch++) {
- if (ch && ch->tty)
- tty_hangup(ch->tty);
+ if (ch && ch->port.tty)
+ tty_hangup(ch->port.tty);
}
}
pci_unregister_driver(&epca_driver);
@@ -1427,7 +1427,7 @@ static void post_fep_init(unsigned int crd)
ch->boardnum = crd;
ch->channelnum = i;
ch->magic = EPCA_MAGIC;
- ch->tty = NULL;
+ ch->port.tty = NULL;
if (shrinkmem) {
fepcmd(ch, SETBUFFER, 32, 0, 0, 0);
@@ -1510,10 +1510,10 @@ static void post_fep_init(unsigned int crd)
ch->fepstopca = 0;
ch->close_delay = 50;
- ch->count = 0;
- ch->blocked_open = 0;
- init_waitqueue_head(&ch->open_wait);
- init_waitqueue_head(&ch->close_wait);
+ ch->port.count = 0;
+ ch->port.blocked_open = 0;
+ init_waitqueue_head(&ch->port.open_wait);
+ init_waitqueue_head(&ch->port.close_wait);
spin_unlock_irqrestore(&epca_lock, flags);
}
@@ -1633,15 +1633,15 @@ static void doevent(int crd)
if (event & MODEMCHG_IND) {
/* A modem signal change has been indicated */
ch->imodem = mstat;
- if (ch->asyncflags & ASYNC_CHECK_CD) {
+ if (ch->port.flags & ASYNC_CHECK_CD) {
/* We are now receiving dcd */
if (mstat & ch->dcd)
- wake_up_interruptible(&ch->open_wait);
+ wake_up_interruptible(&ch->port.open_wait);
else /* No dcd; hangup */
pc_sched_event(ch, EPCA_EVENT_HANGUP);
}
}
- tty = ch->tty;
+ tty = ch->port.tty;
if (tty) {
if (event & BREAK_IND) {
/* A break has been indicated */
@@ -1880,9 +1880,9 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch)
* that the driver will wait on carrier detect.
*/
if (ts->c_cflag & CLOCAL)
- ch->asyncflags &= ~ASYNC_CHECK_CD;
+ ch->port.flags &= ~ASYNC_CHECK_CD;
else
- ch->asyncflags |= ASYNC_CHECK_CD;
+ ch->port.flags |= ASYNC_CHECK_CD;
mval = ch->m_dtr | ch->m_rts;
} /* End CBAUD not detected */
iflag = termios2digi_i(ch, ts->c_iflag);
@@ -1972,7 +1972,7 @@ static void receive_data(struct channel *ch)
globalwinon(ch);
if (ch->statusflags & RXSTOPPED)
return;
- tty = ch->tty;
+ tty = ch->port.tty;
if (tty)
ts = tty->termios;
bc = ch->brdchan;
@@ -2032,7 +2032,7 @@ static void receive_data(struct channel *ch)
globalwinon(ch);
writew(tail, &bc->rout);
/* Must be called with global data */
- tty_schedule_flip(ch->tty);
+ tty_schedule_flip(ch->port.tty);
}
static int info_ioctl(struct tty_struct *tty, struct file *file,
@@ -2376,7 +2376,7 @@ static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
if (!(old_termios->c_cflag & CLOCAL) &&
(tty->termios->c_cflag & CLOCAL))
- wake_up_interruptible(&ch->open_wait);
+ wake_up_interruptible(&ch->port.open_wait);
} /* End if channel valid */
}
@@ -2386,13 +2386,13 @@ static void do_softint(struct work_struct *work)
struct channel *ch = container_of(work, struct channel, tqueue);
/* Called in response to a modem change event */
if (ch && ch->magic == EPCA_MAGIC) {
- struct tty_struct *tty = ch->tty;
+ struct tty_struct *tty = ch->port.tty;
if (tty && tty->driver_data) {
if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) {
tty_hangup(tty);
- wake_up_interruptible(&ch->open_wait);
- ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
+ wake_up_interruptible(&ch->port.open_wait);
+ ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
}
}
}
diff --git a/drivers/char/epca.h b/drivers/char/epca.h
index 3c77c02..d414bf2 100644
--- a/drivers/char/epca.h
+++ b/drivers/char/epca.h
@@ -84,6 +84,7 @@ static char *board_desc[] =
struct channel
{
long magic;
+ struct tty_port port;
unsigned char boardnum;
unsigned char channelnum;
unsigned char omodem; /* FEP output modem status */
@@ -117,10 +118,7 @@ struct channel
unsigned short rxbufhead;
unsigned short rxbufsize;
int close_delay;
- int count;
- int blocked_open;
unsigned long event;
- int asyncflags;
uint dev;
unsigned long statusflags;
unsigned long c_iflag;
@@ -132,9 +130,6 @@ struct channel
struct board_info *board;
struct board_chan __iomem *brdchan;
struct digi_struct digiext;
- struct tty_struct *tty;
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
struct work_struct tqueue;
struct global_data __iomem *mailbox;
};
--
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