diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/opticon.c | 141 |
1 files changed, 11 insertions, 130 deletions
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c index 8d6ece048f07..c6bfb83efb1e 100644 --- a/drivers/usb/serial/opticon.c +++ b/drivers/usb/serial/opticon.c @@ -1,6 +1,7 @@ /* * Opticon USB barcode to serial driver * + * Copyright (C) 2011 - 2012 Johan Hovold <jhovold@gmail.com> * Copyright (C) 2011 Martin Jansen <martin.jansen@opticon.com> * Copyright (C) 2008 - 2009 Greg Kroah-Hartman <gregkh@suse.de> * Copyright (C) 2008 - 2009 Novell Inc. @@ -40,10 +41,7 @@ MODULE_DEVICE_TABLE(usb, id_table); /* This structure holds all of the individual device information */ struct opticon_private { - struct urb *bulk_read_urb; spinlock_t lock; /* protects the following flags */ - bool throttled; - bool actually_throttled; bool rts; bool cts; int outstanding_urbs; @@ -109,49 +107,6 @@ static void opticon_process_read_urb(struct urb *urb) } } -static void opticon_read_bulk_callback(struct urb *urb) -{ - struct usb_serial_port *port = urb->context; - struct opticon_private *priv = usb_get_serial_port_data(port); - unsigned char *data = urb->transfer_buffer; - int status = urb->status; - int result; - - switch (status) { - case 0: - /* success */ - break; - case -ECONNRESET: - case -ENOENT: - case -ESHUTDOWN: - /* this urb is terminated, clean up */ - dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", - __func__, status); - return; - default: - dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", - __func__, status); - goto exit; - } - - usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); - - opticon_process_read_urb(urb); -exit: - spin_lock(&priv->lock); - - /* Continue trying to always read if we should */ - if (!priv->throttled) { - result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); - if (result) - dev_err(&port->dev, - "%s - failed resubmitting read urb, error %d\n", - __func__, result); - } else - priv->actually_throttled = true; - spin_unlock(&priv->lock); -} - static int send_control_msg(struct usb_serial_port *port, u8 requesttype, u8 val) { @@ -179,11 +134,9 @@ static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port) { struct opticon_private *priv = usb_get_serial_port_data(port); unsigned long flags; - int result = 0; + int res; spin_lock_irqsave(&priv->lock, flags); - priv->throttled = false; - priv->actually_throttled = false; priv->rts = false; spin_unlock_irqrestore(&priv->lock, flags); @@ -191,25 +144,17 @@ static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port) send_control_msg(port, CONTROL_RTS, 0); /* clear the halt status of the enpoint */ - usb_clear_halt(port->serial->dev, priv->bulk_read_urb->pipe); + usb_clear_halt(port->serial->dev, port->read_urb->pipe); + + res = usb_serial_generic_open(tty, port); + if (!res) + return res; - result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL); - if (result) - dev_err(&port->dev, - "%s - failed resubmitting read urb, error %d\n", - __func__, result); /* Request CTS line state, sometimes during opening the current * CTS state can be missed. */ send_control_msg(port, RESEND_CTS_STATE, 1); - return result; -} -static void opticon_close(struct usb_serial_port *port) -{ - struct opticon_private *priv = usb_get_serial_port_data(port); - - /* shutdown our urbs */ - usb_kill_urb(priv->bulk_read_urb); + return res; } static void opticon_write_control_callback(struct urb *urb) @@ -346,40 +291,6 @@ static int opticon_write_room(struct tty_struct *tty) return 2048; } -static void opticon_throttle(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - struct opticon_private *priv = usb_get_serial_port_data(port); - unsigned long flags; - - spin_lock_irqsave(&priv->lock, flags); - priv->throttled = true; - spin_unlock_irqrestore(&priv->lock, flags); -} - - -static void opticon_unthrottle(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - struct opticon_private *priv = usb_get_serial_port_data(port); - unsigned long flags; - int result, was_throttled; - - spin_lock_irqsave(&priv->lock, flags); - priv->throttled = false; - was_throttled = priv->actually_throttled; - priv->actually_throttled = false; - spin_unlock_irqrestore(&priv->lock, flags); - - if (was_throttled) { - result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); - if (result) - dev_err(&port->dev, - "%s - failed submitting read urb, error %d\n", - __func__, result); - } -} - static int opticon_tiocmget(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; @@ -495,7 +406,6 @@ static int opticon_port_probe(struct usb_serial_port *port) return -ENOMEM; spin_lock_init(&priv->lock); - priv->bulk_read_urb = port->read_urbs[0]; usb_set_serial_port_data(port, priv); @@ -511,32 +421,6 @@ static int opticon_port_remove(struct usb_serial_port *port) return 0; } -static int opticon_suspend(struct usb_serial *serial, pm_message_t message) -{ - struct opticon_private *priv; - - priv = usb_get_serial_port_data(serial->port[0]); - - usb_kill_urb(priv->bulk_read_urb); - return 0; -} - -static int opticon_resume(struct usb_serial *serial) -{ - struct usb_serial_port *port = serial->port[0]; - struct opticon_private *priv = usb_get_serial_port_data(port); - int result; - - mutex_lock(&port->port.mutex); - /* This is protected by the port mutex against close/open */ - if (test_bit(ASYNCB_INITIALIZED, &port->port.flags)) - result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO); - else - result = 0; - mutex_unlock(&port->port.mutex); - return result; -} - static struct usb_serial_driver opticon_device = { .driver = { .owner = THIS_MODULE, @@ -549,17 +433,14 @@ static struct usb_serial_driver opticon_device = { .port_probe = opticon_port_probe, .port_remove = opticon_port_remove, .open = opticon_open, - .close = opticon_close, .write = opticon_write, .write_room = opticon_write_room, - .throttle = opticon_throttle, - .unthrottle = opticon_unthrottle, + .throttle = usb_serial_generic_throttle, + .unthrottle = usb_serial_generic_unthrottle, .ioctl = opticon_ioctl, .tiocmget = opticon_tiocmget, .tiocmset = opticon_tiocmset, - .suspend = opticon_suspend, - .resume = opticon_resume, - .read_bulk_callback = opticon_read_bulk_callback, + .process_read_urb = opticon_process_read_urb, }; static struct usb_serial_driver * const serial_drivers[] = { |