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path: root/drivers/usb/serial/cypress_m8.c
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Diffstat (limited to 'drivers/usb/serial/cypress_m8.c')
-rw-r--r--drivers/usb/serial/cypress_m8.c92
1 files changed, 37 insertions, 55 deletions
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 8efa19d0e9fb..d341555d37d8 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -111,7 +111,6 @@ struct cypress_private {
int baud_rate; /* stores current baud rate in
integer form */
int isthrottled; /* if throttled, discard reads */
- wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */
char prev_status, diff_status; /* used for TIOCMIWAIT */
/* we pass a pointer to this as the argument sent to
cypress_set_termios old_termios */
@@ -130,13 +129,12 @@ static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count);
static void cypress_send(struct usb_serial_port *port);
static int cypress_write_room(struct tty_struct *tty);
-static int cypress_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg);
static void cypress_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old);
static int cypress_tiocmget(struct tty_struct *tty);
static int cypress_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
+static int cypress_tiocmiwait(struct tty_struct *tty, unsigned long arg);
static int cypress_chars_in_buffer(struct tty_struct *tty);
static void cypress_throttle(struct tty_struct *tty);
static void cypress_unthrottle(struct tty_struct *tty);
@@ -159,10 +157,10 @@ static struct usb_serial_driver cypress_earthmate_device = {
.dtr_rts = cypress_dtr_rts,
.write = cypress_write,
.write_room = cypress_write_room,
- .ioctl = cypress_ioctl,
.set_termios = cypress_set_termios,
.tiocmget = cypress_tiocmget,
.tiocmset = cypress_tiocmset,
+ .tiocmiwait = cypress_tiocmiwait,
.chars_in_buffer = cypress_chars_in_buffer,
.throttle = cypress_throttle,
.unthrottle = cypress_unthrottle,
@@ -185,10 +183,10 @@ static struct usb_serial_driver cypress_hidcom_device = {
.dtr_rts = cypress_dtr_rts,
.write = cypress_write,
.write_room = cypress_write_room,
- .ioctl = cypress_ioctl,
.set_termios = cypress_set_termios,
.tiocmget = cypress_tiocmget,
.tiocmset = cypress_tiocmset,
+ .tiocmiwait = cypress_tiocmiwait,
.chars_in_buffer = cypress_chars_in_buffer,
.throttle = cypress_throttle,
.unthrottle = cypress_unthrottle,
@@ -211,10 +209,10 @@ static struct usb_serial_driver cypress_ca42v2_device = {
.dtr_rts = cypress_dtr_rts,
.write = cypress_write,
.write_room = cypress_write_room,
- .ioctl = cypress_ioctl,
.set_termios = cypress_set_termios,
.tiocmget = cypress_tiocmget,
.tiocmset = cypress_tiocmset,
+ .tiocmiwait = cypress_tiocmiwait,
.chars_in_buffer = cypress_chars_in_buffer,
.throttle = cypress_throttle,
.unthrottle = cypress_unthrottle,
@@ -449,7 +447,6 @@ static int cypress_generic_port_probe(struct usb_serial_port *port)
kfree(priv);
return -ENOMEM;
}
- init_waitqueue_head(&priv->delta_msr_wait);
usb_reset_configuration(serial->dev);
@@ -635,12 +632,6 @@ static void cypress_close(struct usb_serial_port *port)
struct cypress_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
- /* writing is potentially harmful, lock must be taken */
- mutex_lock(&port->serial->disc_mutex);
- if (port->serial->disconnected) {
- mutex_unlock(&port->serial->disc_mutex);
- return;
- }
spin_lock_irqsave(&priv->lock, flags);
kfifo_reset_out(&priv->write_fifo);
spin_unlock_irqrestore(&priv->lock, flags);
@@ -652,7 +643,6 @@ static void cypress_close(struct usb_serial_port *port)
if (stats)
dev_info(&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n",
priv->bytes_in, priv->bytes_out, priv->cmd_count);
- mutex_unlock(&port->serial->disc_mutex);
} /* cypress_close */
@@ -857,51 +847,43 @@ static int cypress_tiocmset(struct tty_struct *tty,
}
-static int cypress_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
+static int cypress_tiocmiwait(struct tty_struct *tty, unsigned long arg)
{
struct usb_serial_port *port = tty->driver_data;
struct cypress_private *priv = usb_get_serial_port_data(port);
-
- dev_dbg(&port->dev, "%s - port %d, cmd 0x%.4x\n", __func__, port->number, cmd);
-
- switch (cmd) {
- /* This code comes from drivers/char/serial.c and ftdi_sio.c */
- case TIOCMIWAIT:
- while (priv != NULL) {
- interruptible_sleep_on(&priv->delta_msr_wait);
- /* see if a signal did it */
- if (signal_pending(current))
- return -ERESTARTSYS;
- else {
- char diff = priv->diff_status;
- if (diff == 0)
- return -EIO; /* no change => error */
-
- /* consume all events */
- priv->diff_status = 0;
-
- /* return 0 if caller wanted to know about
- these bits */
- if (((arg & TIOCM_RNG) && (diff & UART_RI)) ||
- ((arg & TIOCM_DSR) && (diff & UART_DSR)) ||
- ((arg & TIOCM_CD) && (diff & UART_CD)) ||
- ((arg & TIOCM_CTS) && (diff & UART_CTS)))
- return 0;
- /* otherwise caller can't care less about what
- * happened, and so we continue to wait for
- * more events.
- */
- }
- }
- return 0;
- default:
- break;
+ char diff;
+
+ for (;;) {
+ interruptible_sleep_on(&port->port.delta_msr_wait);
+ /* see if a signal did it */
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+
+ if (port->serial->disconnected)
+ return -EIO;
+
+ diff = priv->diff_status;
+ if (diff == 0)
+ return -EIO; /* no change => error */
+
+ /* consume all events */
+ priv->diff_status = 0;
+
+ /* return 0 if caller wanted to know about
+ these bits */
+ if (((arg & TIOCM_RNG) && (diff & UART_RI)) ||
+ ((arg & TIOCM_DSR) && (diff & UART_DSR)) ||
+ ((arg & TIOCM_CD) && (diff & UART_CD)) ||
+ ((arg & TIOCM_CTS) && (diff & UART_CTS)))
+ return 0;
+ /* otherwise caller can't care less about what
+ * happened, and so we continue to wait for
+ * more events.
+ */
}
- dev_dbg(&port->dev, "%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h\n", __func__, cmd);
- return -ENOIOCTLCMD;
-} /* cypress_ioctl */
+ return 0;
+}
static void cypress_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
@@ -1187,7 +1169,7 @@ static void cypress_read_int_callback(struct urb *urb)
if (priv->current_status != priv->prev_status) {
priv->diff_status |= priv->current_status ^
priv->prev_status;
- wake_up_interruptible(&priv->delta_msr_wait);
+ wake_up_interruptible(&port->port.delta_msr_wait);
priv->prev_status = priv->current_status;
}
spin_unlock_irqrestore(&priv->lock, flags);