empeg: Coding style
authorAlan Cox <alan@redhat.com>
Tue, 22 Jul 2008 10:11:11 +0000 (11:11 +0100)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 22 Jul 2008 20:03:23 +0000 (13:03 -0700)
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/usb/serial/empeg.c

index 47ebdf5fad8ebcd043abf55095a0c603111ddfad..a6ab5b58d9ca5c6456a9a56eb7606e4fb18c4b0e 100644 (file)
  *     it under the terms of the GNU General Public License, as published by
  *     the Free Software Foundation, version 2.
  *
- * See Documentation/usb/usb-serial.txt for more information on using this driver
- * 
+ * See Documentation/usb/usb-serial.txt for more information on using this
+ * driver
+ *
  * (07/16/2001) gb
- *     remove unused code in empeg_close() (thanks to Oliver Neukum for pointing this
- *     out) and rewrote empeg_set_termios().
- * 
+ *     remove unused code in empeg_close() (thanks to Oliver Neukum for
+ *     pointing this out) and rewrote empeg_set_termios().
+ *
  * (05/30/2001) gkh
- *     switched from using spinlock to a semaphore, which fixes lots of problems.
+ *     switched from using spinlock to a semaphore, which fixes lots of
+ * problems.
  *
  * (04/08/2001) gb
  *      Identify version on module load.
- * 
+ *
  * (01/22/2001) gb
- *     Added write_room() and chars_in_buffer() support. 
- * 
+ *     Added write_room() and chars_in_buffer() support.
+ *
  * (12/21/2000) gb
  *     Moved termio stuff inside the port->active check.
  *     Moved MOD_DEC_USE_COUNT to end of empeg_close().
- * 
+ *
  * (12/03/2000) gb
- *     Added port->port.tty->ldisc.set_termios(port->port.tty, NULL) to empeg_open()
- *     This notifies the tty driver that the termios have changed.
- * 
+ *     Added port->port.tty->ldisc.set_termios(port->port.tty, NULL) to
+ *     empeg_open(). This notifies the tty driver that the termios have
+ *     changed.
+ *
  * (11/13/2000) gb
- *     Moved tty->low_latency = 1 from empeg_read_bulk_callback() to empeg_open()
- *     (It only needs to be set once - Doh!)
- * 
+ *     Moved tty->low_latency = 1 from empeg_read_bulk_callback() to
+ *     empeg_open() (It only needs to be set once - Doh!)
+ *
  * (11/11/2000) gb
  *     Updated to work with id_table structure.
- * 
+ *
  * (11/04/2000) gb
  *     Forked this from visor.c, and hacked it up to work with an
  *     Empeg ltd. empeg-car player.  Constructive criticism welcomed.
@@ -48,7 +51,7 @@
  *     use of his code, and for his guidance, advice and patience. :)
  *     A 'Thank You' is in order for John Ripley of Empeg ltd for his
  *     advice, and patience too.
- * 
+ *
  */
 
 #include <linux/kernel.h>
@@ -60,7 +63,7 @@
 #include <linux/tty_flip.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
 
@@ -77,27 +80,30 @@ static int debug;
 #define EMPEG_PRODUCT_ID               0x0001
 
 /* function prototypes for an empeg-car player */
-static int  empeg_open                 (struct tty_struct *tty, struct usb_serial_port *port, struct file *filp);
-static void empeg_close                        (struct tty_struct *tty, struct usb_serial_port *port, struct file *filp);
-static int  empeg_write                        (struct tty_struct *tty, struct usb_serial_port *port,
-                                       const unsigned char *buf,
-                                       int count);
-static int  empeg_write_room           (struct tty_struct *tty);
-static int  empeg_chars_in_buffer      (struct tty_struct *tty);
-static void empeg_throttle             (struct tty_struct *tty);
-static void empeg_unthrottle           (struct tty_struct *tty);
-static int  empeg_startup              (struct usb_serial *serial);
-static void empeg_shutdown             (struct usb_serial *serial);
-static void empeg_set_termios          (struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios);
-static void empeg_write_bulk_callback  (struct urb *urb);
-static void empeg_read_bulk_callback   (struct urb *urb);
+static int  empeg_open(struct tty_struct *tty, struct usb_serial_port *port,
+                                               struct file *filp);
+static void empeg_close(struct tty_struct *tty, struct usb_serial_port *port,
+                                               struct file *filp);
+static int  empeg_write(struct tty_struct *tty, struct usb_serial_port *port,
+                                               const unsigned char *buf,
+                                               int count);
+static int  empeg_write_room(struct tty_struct *tty);
+static int  empeg_chars_in_buffer(struct tty_struct *tty);
+static void empeg_throttle(struct tty_struct *tty);
+static void empeg_unthrottle(struct tty_struct *tty);
+static int  empeg_startup(struct usb_serial *serial);
+static void empeg_shutdown(struct usb_serial *serial);
+static void empeg_set_termios(struct tty_struct *tty,
+               struct usb_serial_port *port, struct ktermios *old_termios);
+static void empeg_write_bulk_callback(struct urb *urb);
+static void empeg_read_bulk_callback(struct urb *urb);
 
 static struct usb_device_id id_table [] = {
        { USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) },
        { }                                     /* Terminating entry */
 };
 
-MODULE_DEVICE_TABLE (usb, id_table);
+MODULE_DEVICE_TABLE(usb, id_table);
 
 static struct usb_driver empeg_driver = {
        .name =         "empeg",
@@ -149,7 +155,7 @@ static int empeg_open(struct tty_struct *tty, struct usb_serial_port *port,
        dbg("%s - port %d", __func__, port->number);
 
        /* Force default termio settings */
-       empeg_set_termios (tty, port, NULL) ;
+       empeg_set_termios(tty, port, NULL) ;
 
        bytes_in = 0;
        bytes_out = 0;
@@ -157,7 +163,7 @@ static int empeg_open(struct tty_struct *tty, struct usb_serial_port *port,
        /* Start reading from the device */
        usb_fill_bulk_urb(
                port->read_urb,
-               serial->dev, 
+               serial->dev,
                usb_rcvbulkpipe(serial->dev,
                        port->bulk_in_endpointAddress),
                port->read_urb->transfer_buffer,
@@ -168,14 +174,16 @@ static int empeg_open(struct tty_struct *tty, struct usb_serial_port *port,
        result = usb_submit_urb(port->read_urb, GFP_KERNEL);
 
        if (result)
-               dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __func__, result);
+               dev_err(&port->dev,
+                       "%s - failed submitting read urb, error %d\n",
+                                                       __func__, result);
 
        return result;
 }
 
 
 static void empeg_close(struct tty_struct *tty, struct usb_serial_port *port,
-                               struct file * filp)
+                               struct file *filp)
 {
        dbg("%s - port %d", __func__, port->number);
 
@@ -186,7 +194,8 @@ static void empeg_close(struct tty_struct *tty, struct usb_serial_port *port,
 }
 
 
-static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count)
+static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port,
+                                       const unsigned char *buf, int count)
 {
        struct usb_serial *serial = port->serial;
        struct urb *urb;
@@ -203,7 +212,7 @@ static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port, con
                /* try to find a free urb in our list of them */
                urb = NULL;
 
-               spin_lock_irqsave (&write_urb_pool_lock, flags);
+               spin_lock_irqsave(&write_urb_pool_lock, flags);
 
                for (i = 0; i < NUM_URBS; ++i) {
                        if (write_urb_pool[i]->status != -EINPROGRESS) {
@@ -212,7 +221,7 @@ static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port, con
                        }
                }
 
-               spin_unlock_irqrestore (&write_urb_pool_lock, flags);
+               spin_unlock_irqrestore(&write_urb_pool_lock, flags);
 
                if (urb == NULL) {
                        dbg("%s - no more free urbs", __func__);
@@ -220,25 +229,27 @@ static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port, con
                }
 
                if (urb->transfer_buffer == NULL) {
-                       urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
+                       urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
                        if (urb->transfer_buffer == NULL) {
-                               dev_err(&port->dev, "%s no more kernel memory...\n", __func__);
+                               dev_err(&port->dev,
+                                       "%s no more kernel memory...\n",
+                                                               __func__);
                                goto exit;
                        }
                }
 
-               transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE);
+               transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
 
-               memcpy (urb->transfer_buffer, current_position, transfer_size);
+               memcpy(urb->transfer_buffer, current_position, transfer_size);
 
                usb_serial_debug_data(debug, &port->dev, __func__, transfer_size, urb->transfer_buffer);
 
                /* build up our urb */
-               usb_fill_bulk_urb (
+               usb_fill_bulk_urb(
                        urb,
                        serial->dev,
                        usb_sndbulkpipe(serial->dev,
-                               port->bulk_out_endpointAddress), 
+                                       port->bulk_out_endpointAddress),
                        urb->transfer_buffer,
                        transfer_size,
                        empeg_write_bulk_callback,
@@ -260,7 +271,7 @@ static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port, con
        }
 exit:
        return bytes_sent;
-} 
+}
 
 
 static int empeg_write_room(struct tty_struct *tty)
@@ -272,14 +283,13 @@ static int empeg_write_room(struct tty_struct *tty)
 
        dbg("%s - port %d", __func__, port->number);
 
-       spin_lock_irqsave (&write_urb_pool_lock, flags);
+       spin_lock_irqsave(&write_urb_pool_lock, flags);
        /* tally up the number of bytes available */
        for (i = 0; i < NUM_URBS; ++i) {
-               if (write_urb_pool[i]->status != -EINPROGRESS) {
+               if (write_urb_pool[i]->status != -EINPROGRESS)
                        room += URB_TRANSFER_BUFFER_SIZE;
-               }
-       } 
-       spin_unlock_irqrestore (&write_urb_pool_lock, flags);
+       }
+       spin_unlock_irqrestore(&write_urb_pool_lock, flags);
        dbg("%s - returns %d", __func__, room);
        return room;
 
@@ -295,25 +305,21 @@ static int empeg_chars_in_buffer(struct tty_struct *tty)
 
        dbg("%s - port %d", __func__, port->number);
 
-       spin_lock_irqsave (&write_urb_pool_lock, flags);
+       spin_lock_irqsave(&write_urb_pool_lock, flags);
 
        /* tally up the number of bytes waiting */
        for (i = 0; i < NUM_URBS; ++i) {
-               if (write_urb_pool[i]->status == -EINPROGRESS) {
+               if (write_urb_pool[i]->status == -EINPROGRESS)
                        chars += URB_TRANSFER_BUFFER_SIZE;
-               }
        }
 
-       spin_unlock_irqrestore (&write_urb_pool_lock, flags);
-
+       spin_unlock_irqrestore(&write_urb_pool_lock, flags);
        dbg("%s - returns %d", __func__, chars);
-
-       return (chars);
-
+       return chars;
 }
 
 
-static void empeg_write_bulk_callback (struct urb *urb)
+static void empeg_write_bulk_callback(struct urb *urb)
 {
        struct usb_serial_port *port = urb->context;
        int status = urb->status;
@@ -330,7 +336,7 @@ static void empeg_write_bulk_callback (struct urb *urb)
 }
 
 
-static void empeg_read_bulk_callback (struct urb *urb)
+static void empeg_read_bulk_callback(struct urb *urb)
 {
        struct usb_serial_port *port = urb->context;
        struct tty_struct *tty;
@@ -346,8 +352,8 @@ static void empeg_read_bulk_callback (struct urb *urb)
                return;
        }
 
-       usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, data);
-
+       usb_serial_debug_data(debug, &port->dev, __func__,
+                                               urb->actual_length, data);
        tty = port->port.tty;
 
        if (urb->actual_length) {
@@ -360,7 +366,7 @@ static void empeg_read_bulk_callback (struct urb *urb)
        /* Continue trying to always read  */
        usb_fill_bulk_urb(
                port->read_urb,
-               port->serial->dev, 
+               port->serial->dev,
                usb_rcvbulkpipe(port->serial->dev,
                        port->bulk_in_endpointAddress),
                port->read_urb->transfer_buffer,
@@ -371,7 +377,9 @@ static void empeg_read_bulk_callback (struct urb *urb)
        result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 
        if (result)
-               dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __func__, result);
+               dev_err(&urb->dev->dev,
+                       "%s - failed resubmitting read urb, error %d\n",
+                                                       __func__, result);
 
        return;
 
@@ -395,11 +403,13 @@ static void empeg_unthrottle(struct tty_struct *tty)
        port->read_urb->dev = port->serial->dev;
        result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
        if (result)
-               dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __func__, result);
+               dev_err(&port->dev,
+                       "%s - failed submitting read urb, error %d\n",
+                                                       __func__, result);
 }
 
 
-static int  empeg_startup (struct usb_serial *serial)
+static int  empeg_startup(struct usb_serial *serial)
 {
        int r;
 
@@ -411,7 +421,7 @@ static int  empeg_startup (struct usb_serial *serial)
                return -ENODEV;
        }
        dbg("%s - reset config", __func__);
-       r = usb_reset_configuration (serial->dev);
+       r = usb_reset_configuration(serial->dev);
 
        /* continue on with initialization */
        return r;
@@ -419,9 +429,9 @@ static int  empeg_startup (struct usb_serial *serial)
 }
 
 
-static void empeg_shutdown (struct usb_serial *serial)
+static void empeg_shutdown(struct usb_serial *serial)
 {
-       dbg ("%s", __func__);
+       dbg("%s", __func__);
 }
 
 
@@ -432,14 +442,14 @@ static void empeg_set_termios(struct tty_struct *tty,
        dbg("%s - port %d", __func__, port->number);
 
        /*
-         * The empeg-car player wants these particular tty settings.
-         * You could, for example, change the baud rate, however the
-         * player only supports 115200 (currently), so there is really
-         * no point in support for changes to the tty settings.
-         * (at least for now)
-         *
-         * The default requirements for this device are:
-         */
+        * The empeg-car player wants these particular tty settings.
+        * You could, for example, change the baud rate, however the
+        * player only supports 115200 (currently), so there is really
+        * no point in support for changes to the tty settings.
+        * (at least for now)
+        *
+        * The default requirements for this device are:
+        */
        termios->c_iflag
                &= ~(IGNBRK     /* disable ignore break */
                | BRKINT        /* disable break causes interrupt */
@@ -478,13 +488,13 @@ static void empeg_set_termios(struct tty_struct *tty,
 }
 
 
-static int __init empeg_init (void)
+static int __init empeg_init(void)
 {
        struct urb *urb;
        int i, retval;
 
-       /* create our write urb pool and transfer buffers */ 
-       spin_lock_init (&write_urb_pool_lock);
+       /* create our write urb pool and transfer buffers */
+       spin_lock_init(&write_urb_pool_lock);
        for (i = 0; i < NUM_URBS; ++i) {
                urb = usb_alloc_urb(0, GFP_KERNEL);
                write_urb_pool[i] = urb;
@@ -493,9 +503,10 @@ static int __init empeg_init (void)
                        continue;
                }
 
-               urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
+               urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
+                                                               GFP_KERNEL);
                if (!urb->transfer_buffer) {
-                       err("%s - out of memory for urb buffers.", 
+                       err("%s - out of memory for urb buffers.",
                            __func__);
                        continue;
                }
@@ -524,36 +535,36 @@ failed_usb_serial_register:
 }
 
 
-static void __exit empeg_exit (void)
+static void __exit empeg_exit(void)
 {
        int i;
        unsigned long flags;
 
        usb_deregister(&empeg_driver);
-       usb_serial_deregister (&empeg_device);
+       usb_serial_deregister(&empeg_device);
 
-       spin_lock_irqsave (&write_urb_pool_lock, flags);
+       spin_lock_irqsave(&write_urb_pool_lock, flags);
 
        for (i = 0; i < NUM_URBS; ++i) {
                if (write_urb_pool[i]) {
-                       /* FIXME - uncomment the following usb_kill_urb call when
-                        * the host controllers get fixed to set urb->dev = NULL after
-                        * the urb is finished.  Otherwise this call oopses. */
+                       /* FIXME - uncomment the following usb_kill_urb call
+                        * when the host controllers get fixed to set urb->dev
+                        * = NULL after the urb is finished.  Otherwise this
+                        * call oopses. */
                        /* usb_kill_urb(write_urb_pool[i]); */
                        kfree(write_urb_pool[i]->transfer_buffer);
-                       usb_free_urb (write_urb_pool[i]);
+                       usb_free_urb(write_urb_pool[i]);
                }
        }
-
-       spin_unlock_irqrestore (&write_urb_pool_lock, flags);
+       spin_unlock_irqrestore(&write_urb_pool_lock, flags);
 }
 
 
 module_init(empeg_init);
 module_exit(empeg_exit);
 
-MODULE_AUTHOR( DRIVER_AUTHOR );
-MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
 module_param(debug, bool, S_IRUGO | S_IWUSR);