/* Reset device */
static int hci_uart_flush(struct hci_dev *hdev)
{
struct hci_uart *hu = (struct hci_uart *) hdev->driver_data;
struct tty_struct *tty = hu->tty;
BT_DBG("hdev %p tty %p", hdev, tty);
if (hu->tx_skb) {
kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
}
/* Flush any pending characters in the driver and discipline. */
tty_ldisc_flush(tty);
tty_driver_flush_buffer(tty);
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
hu->proto->flush(hu);
return 0;
}
/*
* ------------------------------------------------------------
* rs_close()
*
* This routine is called when the serial port gets closed. First, we
* wait for the last remaining data to be sent. Then, we unlink its
* async structure from the interrupt chain if necessary, and we free
* that IRQ if nothing is left in the chain.
* ------------------------------------------------------------
*/
static void rs_close(struct tty_struct *tty, struct file * filp)
{
struct serial_state *state = tty->driver_data;
struct tty_port *port = &state->tport;
if (serial_paranoia_check(state, tty->name, "rs_close"))
return;
if (tty_port_close_start(port, tty, filp) == 0)
return;
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
* interrupt driver to stop checking the data ready bit in the
* line status register.
*/
state->read_status_mask &= ~UART_LSR_DR;
if (port->flags & ASYNC_INITIALIZED) {
/* disable receive interrupts */
custom.intena = IF_RBF;
mb();
/* clear any pending receive interrupt */
custom.intreq = IF_RBF;
mb();
/*
* Before we drop DTR, make sure the UART transmitter
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
rs_wait_until_sent(tty, state->timeout);
}
shutdown(tty, state);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
port->tty = NULL;
tty_port_close_end(port, tty);
}
/* Reset device */
static int hci_uart_flush(struct hci_dev *hdev)
{
struct hci_uart *hu = (struct hci_uart *) hdev->driver_data;
struct tty_struct *tty = hu->tty;
BT_DBG("hdev %p tty %p", hdev, tty);
if (hu->tx_skb) {
kfree_skb(hu->tx_skb); hu->tx_skb = NULL;
}
tty_ldisc_flush(tty);
if (tty->driver.flush_buffer)
tty->driver.flush_buffer(tty);
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
hu->proto->flush(hu);
return 0;
}
/*
* Close down a RIN channel.
* This means flushing out any pending queues, and then returning. This
* call is serialized against other ldisc functions.
*/
static void rin_close(struct tty_struct *tty)
{
struct rin_st *sl = tty->disc_data;
/* First make sure we're connected. */
if (!sl || sl->magic != RIN_MAGIC || sl->tty != tty)
return;
//spin_lock(&sl->lock);
//LGE_DOMESTIC_ADD_START 2011-09-29
//if(rin_tx_wq)
//flush_workqueue(rin_tx_wq);
//LGE_DOMESTIC_ADD_END
tty_ldisc_flush(tty);
tty->disc_data = NULL;
sl->tty = NULL;
if (!sl->leased)
sl->line = 0;
rindrv_count++;
if(DEBUG) printk("%s - line : %d - rindrv_count = %d\n", __FUNCTION__, __LINE__, rindrv_count);
//spin_unlock(&sl->lock);
}
/*
* functions called from TTY layer
*/
static int st_tty_open(struct tty_struct *tty)
{
int err = 0;
struct st_data_s *st_gdata;
pr_info("%s ", __func__);
st_kim_ref(&st_gdata, 0);
st_gdata->tty = tty;
tty->disc_data = st_gdata;
if (tty->dev->parent)
st_gdata->tty_dev = tty->dev->parent;
else
return -EINVAL;
/* Asynchronous Get is enough here since we just want to avoid
* interface to be released too early
*/
pm_runtime_get(st_gdata->tty_dev);
/* don't do an wakeup for now */
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
/* mem already allocated
*/
tty->receive_room = 65536;
/* Flush any pending characters in the driver and discipline. */
tty_ldisc_flush(tty);
tty_driver_flush_buffer(tty);
/*
* signal to UIM via KIM that -
* installation of N_TI_WL ldisc is complete
*/
st_kim_complete(st_gdata->kim_data);
pr_debug("done %s", __func__);
return err;
}
/*
* Close down a RIN channel.
* This means flushing out any pending queues, and then returning. This
* call is serialized against other ldisc functions.
*/
static void rin_close(struct tty_struct *tty)
{
struct rin_st *sl = tty->disc_data;
/* First make sure we're connected. */
if (!sl || sl->magic != RIN_MAGIC || sl->tty != tty)
return;
// START:: RIP-11174 [Data] Upon RIL recovery completion, multiple RIN channel should be opened.
spin_lock(&sl->lock);
if(rin_tx_wq)
flush_workqueue(rin_tx_wq);
// END:: RIP-11174 [Data] Upon RIL recovery completion, multiple RIN channel should be opened.
tty_ldisc_flush(tty);
tty->disc_data = NULL;
sl->tty = NULL;
if (!sl->leased)
sl->line = 0;
rindrv_count++;
printk("%s - line : %d - rindrv_count = %d\n", __FUNCTION__, __LINE__, rindrv_count);
// START:: RIP-11174 [Data] Upon RIL recovery completion, multiple RIN channel should be opened.
spin_unlock(&sl->lock);
// END:: RIP-11174 [Data] Upon RIL recovery completion, multiple RIN channel should be opened.
}
void gs_close(struct tty_struct * tty, struct file * filp)
{
unsigned long flags;
struct gs_port *port;
func_enter ();
if (!tty) return;
port = (struct gs_port *) tty->driver_data;
if (!port) return;
if (!port->tty) {
/* This seems to happen when this is called from vhangup. */
gs_dprintk (GS_DEBUG_CLOSE, "gs: Odd: port->tty is NULL\n");
port->tty = tty;
}
spin_lock_irqsave(&port->driver_lock, flags);
if (tty_hung_up_p(filp)) {
spin_unlock_irqrestore(&port->driver_lock, flags);
if (port->rd->hungup)
port->rd->hungup (port);
func_exit ();
return;
}
if ((tty->count == 1) && (port->count != 1)) {
printk(KERN_ERR "gs: gs_close port %p: bad port count;"
" tty->count is 1, port count is %d\n", port, port->count);
port->count = 1;
}
if (--port->count < 0) {
printk(KERN_ERR "gs: gs_close port %p: bad port count: %d\n", port, port->count);
port->count = 0;
}
if (port->count) {
gs_dprintk(GS_DEBUG_CLOSE, "gs_close port %p: count: %d\n", port, port->count);
spin_unlock_irqrestore(&port->driver_lock, flags);
func_exit ();
return;
}
port->flags |= ASYNC_CLOSING;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
/* if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, port->closing_wait); */
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
* interrupt driver to stop checking the data ready bit in the
* line status register.
*/
port->rd->disable_rx_interrupts (port);
spin_unlock_irqrestore(&port->driver_lock, flags);
/* close has no way of returning "EINTR", so discard return value */
if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
gs_wait_tx_flushed (port, port->closing_wait);
port->flags &= ~GS_ACTIVE;
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
port->event = 0;
port->rd->close (port);
port->rd->shutdown_port (port);
port->tty = NULL;
if (port->blocked_open) {
if (port->close_delay) {
spin_unlock_irqrestore(&port->driver_lock, flags);
msleep_interruptible(jiffies_to_msecs(port->close_delay));
spin_lock_irqsave(&port->driver_lock, flags);
}
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING | ASYNC_INITIALIZED);
wake_up_interruptible(&port->close_wait);
func_exit ();
}
/*
* ------------------------------------------------------------
* rs_close()
*
* This routine is called when the serial port gets closed. First, we
* wait for the last remaining data to be sent. Then, we unlink its
* S structure from the interrupt chain if necessary, and we free
* that IRQ if nothing is left in the chain.
* ------------------------------------------------------------
*/
static void rs_close(struct tty_struct *tty, struct file * filp)
{
struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
m68328_uart *uart = &uart_addr[info->line];
unsigned long flags;
if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
return;
local_irq_save(flags);
if (tty_hung_up_p(filp)) {
local_irq_restore(flags);
return;
}
if ((tty->count == 1) && (info->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk("rs_close: bad serial port count; tty->count is 1, "
"info->count is %d\n", info->count);
info->count = 1;
}
if (--info->count < 0) {
printk("rs_close: bad serial port count for ttyS%d: %d\n",
info->line, info->count);
info->count = 0;
}
if (info->count) {
local_irq_restore(flags);
return;
}
info->flags |= S_CLOSING;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
if (info->closing_wait != S_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, info->closing_wait);
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
* interrupt driver to stop checking the data ready bit in the
* line status register.
*/
uart->ustcnt &= ~USTCNT_RXEN;
uart->ustcnt &= ~(USTCNT_RXEN | USTCNT_RX_INTR_MASK);
shutdown(info);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
info->event = 0;
info->tty = NULL;
#warning "This is not and has never been valid so fix it"
#if 0
if (tty->ldisc.num != ldiscs[N_TTY].num) {
if (tty->ldisc.close)
(tty->ldisc.close)(tty);
tty->ldisc = ldiscs[N_TTY];
tty->termios->c_line = N_TTY;
if (tty->ldisc.open)
(tty->ldisc.open)(tty);
}
#endif
if (info->blocked_open) {
if (info->close_delay) {
msleep_interruptible(jiffies_to_msecs(info->close_delay));
}
wake_up_interruptible(&info->open_wait);
}
info->flags &= ~(S_NORMAL_ACTIVE|S_CLOSING);
wake_up_interruptible(&info->close_wait);
local_irq_restore(flags);
}
/**
* Prototype : release_tty_drv
* Description : called from PS Core when BT protocol stack drivers
* unregistration,or FM/GNSS hal stack close FM/GNSS inode
* input : ps_plat_d
* output : return 0--> open tty uart is ok
* return !0-> open tty uart is false
* Calls :
* Called By :
*
* History :
* 1.Date : 2012/11/05
* Author : wx144390
* Modification : Created function
*
*/
int32 release_tty_drv(void *pm_data)
{
int32 error;
struct ps_plat_s *ps_plat_d = NULL;
struct tty_struct *tty = NULL;
struct ps_core_s *ps_core_d;
uint64 timeleft = 0;
uint8 delay_times = RELEASE_DELAT_TIMES;
PS_PRINT_INFO("%s\n", __func__);
if (unlikely(NULL == pm_data))
{
PS_PRINT_ERR("pm_data is NULL");
return -EINVAL;
}
ps_plat_d = (struct ps_plat_s *)pm_data;
ps_core_d = ps_plat_d->core_data;
tty = ps_core_d->tty;
if (false == ps_core_d->tty_have_open)
{
PS_PRINT_INFO("hisi bfgx line discipline have uninstalled, ignored\n");
return 0;
}
/* clean all tx sk_buff */
while(((ps_core_d->tx_high_seq.qlen)||(ps_core_d->tx_low_seq.qlen))&&(delay_times))
{
msleep(100);
delay_times --;
}
msleep(200);
if (tty)
{ /* can be called before ldisc is installed */
/* Flush any pending characters in the driver and discipline. */
PS_PRINT_INFO(" %s--> into flush_buffer\n", __func__);
tty_ldisc_flush(tty);
tty_driver_flush_buffer(tty);
}
INIT_COMPLETION(ps_plat_d->ldisc_uninstalled);
ps_plat_d->ldisc_install = TTY_LDISC_UNINSTALL;
PS_PRINT_INFO("ldisc_install = %d\n", TTY_LDISC_UNINSTALL);
sysfs_notify(g_sysfs_hi110x_bfgx, NULL, "install");
ps_uart_state_pre(ps_core_d->tty);
timeleft = wait_for_completion_timeout(&ps_plat_d->ldisc_uninstalled, msecs_to_jiffies(HISI_LDISC_TIME));
if (!timeleft)
{
ps_uart_state_dump(ps_core_d->tty);
PS_PRINT_ERR("hisi bfgx ldisc uninstall timeout\n");
error = -ETIMEDOUT;
}
else
{
PS_PRINT_SUC("hisi bfgx line discipline uninstall succ\n");
error = 0;
}
ps_core_d->tty_have_open = false;
ps_plat_d->flow_cntrl = FLOW_CTRL_ENABLE;
ps_plat_d->baud_rate = DEFAULT_BAUD_RATE;
return error;
}
/*
* ------------------------------------------------------------
* mcfrs_close()
*
* This routine is called when the serial port gets closed. First, we
* wait for the last remaining data to be sent. Then, we unlink its
* S structure from the interrupt chain if necessary, and we free
* that IRQ if nothing is left in the chain.
* ------------------------------------------------------------
*/
static void mcfrs_close(struct tty_struct *tty, struct file * filp)
{
volatile unsigned char *uartp;
struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
unsigned long flags;
if (!info || serial_paranoia_check(info, tty->name, "mcfrs_close"))
return;
local_irq_save(flags);
if (tty_hung_up_p(filp)) {
local_irq_restore(flags);
return;
}
#ifdef SERIAL_DEBUG_OPEN
printk("mcfrs_close ttyS%d, count = %d\n", info->line, info->count);
#endif
if ((tty->count == 1) && (info->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk("MCFRS: bad serial port count; tty->count is 1, "
"info->count is %d\n", info->count);
info->count = 1;
}
if (--info->count < 0) {
printk("MCFRS: bad serial port count for ttyS%d: %d\n",
info->line, info->count);
info->count = 0;
}
if (info->count) {
local_irq_restore(flags);
return;
}
info->flags |= ASYNC_CLOSING;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, info->closing_wait);
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
* interrupt driver to stop checking the data ready bit in the
* line status register.
*/
info->imr &= ~MCFUART_UIR_RXREADY;
uartp = info->addr;
uartp[MCFUART_UIMR] = info->imr;
#if 0
/* FIXME: do we need to keep this enabled for console?? */
if (mcfrs_console_inited && (mcfrs_console_port == info->line)) {
/* Do not disable the UART */ ;
} else
#endif
shutdown(info);
mcfrs_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
info->event = 0;
info->port.tty = NULL;
#if 0
if (tty->ldisc.num != ldiscs[N_TTY].num) {
if (tty->ldisc.close)
(tty->ldisc.close)(tty);
tty->ldisc = ldiscs[N_TTY];
tty->termios->c_line = N_TTY;
if (tty->ldisc.open)
(tty->ldisc.open)(tty);
}
#endif
if (info->blocked_open) {
if (info->close_delay) {
msleep_interruptible(jiffies_to_msecs(info->close_delay));
}
wake_up_interruptible(&info->open_wait);
}
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
local_irq_restore(flags);
}
void sab8253x_closeS(struct tty_struct *tty, struct file * filp)
{
struct sab_port *port = (struct sab_port *)tty->driver_data;
unsigned long flags;
MOD_DEC_USE_COUNT;
if (sab8253x_serial_paranoia_check(port, tty->device, "sab8253x_closeS"))
{
return;
}
if(port->open_type == OPEN_SYNC_NET)
{ /* port->tty field should already be NULL */
return;
}
save_flags(flags); cli();
--(port->count);
if (tty_hung_up_p(filp))
{
if(port->count == 0) /* I think the reason for the weirdness
relates to freeing of structures in
the tty driver */
{
port->open_type = OPEN_NOT;
}
else if(port->count < 0)
{
printk(KERN_ALERT "XX20: port->count went negative.\n");
port->count = 0;
port->open_type = OPEN_NOT;
}
restore_flags(flags);
return;
}
#if 0
if ((tty->count == 1) && (port->count != 0))
{
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. port->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk("sab8253x_close: bad serial port count; tty->count is 1,"
" port->count is %d\n", port->count);
port->count = 0;
}
#endif
if (port->count < 0)
{
printk(KERN_ALERT "sab8253x_close: bad serial port count for ttys%d: %d\n",
port->line, port->count);
port->count = 0;
}
if (port->count)
{
restore_flags(flags);
return;
}
port->flags |= FLAG8253X_CLOSING;
/*
* Save the termios structure, since this port may have
* separate termios for callout and dialin.
*/
if (port->flags & FLAG8253X_NORMAL_ACTIVE)
{
port->normal_termios = *tty->termios;
}
if (port->flags & FLAG8253X_CALLOUT_ACTIVE)
{
port->callout_termios = *tty->termios;
}
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
if (port->closing_wait != SAB8253X_CLOSING_WAIT_NONE)
{
tty_wait_until_sent(tty, port->closing_wait);
}
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and turn off
* the receiver.
*/
#if 0
port->interrupt_mask0 |= SAB82532_IMR0_TCD; /* not needed for sync */
#endif
WRITEB(port,imr0,port->interrupt_mask0);
CLEAR_REG_BIT(port, mode, SAB82532_MODE_RAC); /* turn off receiver */
if (port->flags & FLAG8253X_INITIALIZED)
{
/*
* Before we drop DTR, make sure the UART transmitter
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
sab8253x_wait_until_sent(tty, port->timeout);
}
sab8253x_shutdownS(port);
Sab8253xCleanUpTransceiveN(port);
if (tty->driver.flush_buffer)
{
tty->driver.flush_buffer(tty);
}
tty_ldisc_flush(tty);
tty->closing = 0;
port->event = 0;
port->tty = 0;
if (port->blocked_open)
{
if (port->close_delay)
{
current->state = TASK_INTERRUPTIBLE;
schedule_timeout(port->close_delay);
}
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(FLAG8253X_NORMAL_ACTIVE|FLAG8253X_CALLOUT_ACTIVE|
FLAG8253X_CLOSING);
wake_up_interruptible(&port->close_wait);
port->open_type = OPEN_NOT;
restore_flags(flags);
}
/*
* ------------------------------------------------------------
* dz_close()
*
* This routine is called when the serial port gets closed. First, we
* wait for the last remaining data to be sent. Then, we turn off
* the transmit enable and receive enable flags.
* ------------------------------------------------------------
*/
static void dz_close(struct tty_struct *tty, struct file *filp)
{
struct dz_serial *info = (struct dz_serial *) tty->driver_data;
unsigned long flags;
if (!info)
return;
save_flags(flags);
cli();
if (tty_hung_up_p(filp)) {
restore_flags(flags);
return;
}
if ((tty->count == 1) && (info->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk("dz_close: bad serial port count; tty->count is 1, "
"info->count is %d\n", info->count);
info->count = 1;
}
if (--info->count < 0) {
printk("ds_close: bad serial port count for ttyS%02d: %d\n",
info->line, info->count);
info->count = 0;
}
if (info->count) {
restore_flags(flags);
return;
}
info->flags |= DZ_CLOSING;
/*
* Save the termios structure, since this port may have
* separate termios for callout and dialin.
*/
if (info->flags & DZ_NORMAL_ACTIVE)
info->normal_termios = *tty->termios;
if (info->flags & DZ_CALLOUT_ACTIVE)
info->callout_termios = *tty->termios;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
if (info->closing_wait != DZ_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, info->closing_wait);
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts.
*/
shutdown(info);
if (tty->driver.flush_buffer)
tty->driver.flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
info->event = 0;
info->tty = 0;
if (tty->ldisc.num != N_TTY) {
if (tty->ldisc.close)
(tty->ldisc.close) (tty);
tty->ldisc = *(tty_ldisc_get(N_TTY));
tty->termios->c_line = N_TTY;
if (tty->ldisc.open)
(tty->ldisc.open) (tty);
}
if (info->blocked_open) {
if (info->close_delay) {
current->state = TASK_INTERRUPTIBLE;
schedule_timeout(info->close_delay);
}
wake_up_interruptible(&info->open_wait);
}
info->flags &= ~(DZ_NORMAL_ACTIVE | DZ_CALLOUT_ACTIVE | DZ_CLOSING);
wake_up_interruptible(&info->close_wait);
restore_flags(flags);
}
/*
* ------------------------------------------------------------
* rs_close()
*
* This routine is called when the serial port gets closed. First, we
* wait for the last remaining data to be sent. Then, we unlink its
* async structure from the interrupt chain if necessary, and we free
* that IRQ if nothing is left in the chain.
* ------------------------------------------------------------
*/
static void rs_close(struct tty_struct *tty, struct file * filp)
{
struct async_struct * info = (struct async_struct *)tty->driver_data;
struct serial_state *state;
unsigned long flags;
if (!info ) return;
state = info->state;
local_irq_save(flags);
if (tty_hung_up_p(filp)) {
#ifdef SIMSERIAL_DEBUG
printk("rs_close: hung_up\n");
#endif
local_irq_restore(flags);
return;
}
#ifdef SIMSERIAL_DEBUG
printk("rs_close ttys%d, count = %d\n", info->line, state->count);
#endif
if ((tty->count == 1) && (state->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. state->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk(KERN_ERR "rs_close: bad serial port count; tty->count is 1, "
"state->count is %d\n", state->count);
state->count = 1;
}
if (--state->count < 0) {
printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
info->line, state->count);
state->count = 0;
}
if (state->count) {
local_irq_restore(flags);
return;
}
info->flags |= ASYNC_CLOSING;
local_irq_restore(flags);
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
shutdown(info);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
info->event = 0;
info->tty = NULL;
if (info->blocked_open) {
if (info->close_delay)
schedule_timeout_interruptible(info->close_delay);
wake_up_interruptible(&info->open_wait);
}
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
}
static void rs_close(struct tty_struct *tty, struct file * filp)
{
struct async_struct * info = tty->driver_data;
struct serial_state *state;
unsigned long flags;
if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
return;
state = info->state;
local_irq_save(flags);
if (tty_hung_up_p(filp)) {
DBG_CNT("before DEC-hung");
local_irq_restore(flags);
return;
}
#ifdef SERIAL_DEBUG_OPEN
printk("rs_close ttys%d, count = %d\n", info->line, state->count);
#endif
if ((tty->count == 1) && (state->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. state->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk("rs_close: bad serial port count; tty->count is 1, "
"state->count is %d\n", state->count);
state->count = 1;
}
if (--state->count < 0) {
printk("rs_close: bad serial port count for ttys%d: %d\n",
info->line, state->count);
state->count = 0;
}
if (state->count) {
DBG_CNT("before DEC-2");
local_irq_restore(flags);
return;
}
info->flags |= ASYNC_CLOSING;
/*
* Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, info->closing_wait);
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
* interrupt driver to stop checking the data ready bit in the
* line status register.
*/
info->read_status_mask &= ~UART_LSR_DR;
if (info->flags & ASYNC_INITIALIZED) {
/* disable receive interrupts */
custom.intena = IF_RBF;
mb();
/* clear any pending receive interrupt */
custom.intreq = IF_RBF;
mb();
/*
* Before we drop DTR, make sure the UART transmitter
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
rs_wait_until_sent(tty, info->timeout);
}
shutdown(info);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
info->event = 0;
info->tty = NULL;
if (info->blocked_open) {
if (info->close_delay) {
msleep_interruptible(jiffies_to_msecs(info->close_delay));
}
wake_up_interruptible(&info->open_wait);
}
info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
local_irq_restore(flags);
}
