USB: pl2303: reduce number of prototypes
Thiago Galesi [Sat, 29 Jul 2006 13:46:37 +0000 (10:46 -0300)]
Reduce number of needed prototypes in Prolific pl2303 driver

Signed-off-by: Thiago Galesi <thiagogalesi@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/pl2303.c

index 0cd42bf..e2d8f9b 100644 (file)
@@ -127,65 +127,6 @@ static struct usb_driver pl2303_driver = {
 #define UART_OVERRUN_ERROR             0x40
 #define UART_CTS                       0x80
 
-/* function prototypes for a PL2303 serial converter */
-static int pl2303_open (struct usb_serial_port *port, struct file *filp);
-static void pl2303_close (struct usb_serial_port *port, struct file *filp);
-static void pl2303_set_termios (struct usb_serial_port *port,
-                               struct termios *old);
-static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
-                        unsigned int cmd, unsigned long arg);
-static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
-static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
-static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
-static int pl2303_write (struct usb_serial_port *port,
-                        const unsigned char *buf, int count);
-static void pl2303_send (struct usb_serial_port *port);
-static int pl2303_write_room(struct usb_serial_port *port);
-static int pl2303_chars_in_buffer(struct usb_serial_port *port);
-static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
-static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
-static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
-                           unsigned int set, unsigned int clear);
-static int pl2303_startup (struct usb_serial *serial);
-static void pl2303_shutdown (struct usb_serial *serial);
-static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
-static void pl2303_buf_free(struct pl2303_buf *pb);
-static void pl2303_buf_clear(struct pl2303_buf *pb);
-static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
-static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
-static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
-       unsigned int count);
-static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
-       unsigned int count);
-
-
-/* All of the device info needed for the PL2303 SIO serial converter */
-static struct usb_serial_driver pl2303_device = {
-       .driver = {
-               .owner =        THIS_MODULE,
-               .name =         "pl2303",
-       },
-       .id_table =             id_table,
-       .num_interrupt_in =     NUM_DONT_CARE,
-       .num_bulk_in =          1,
-       .num_bulk_out =         1,
-       .num_ports =            1,
-       .open =                 pl2303_open,
-       .close =                pl2303_close,
-       .write =                pl2303_write,
-       .ioctl =                pl2303_ioctl,
-       .break_ctl =            pl2303_break_ctl,
-       .set_termios =          pl2303_set_termios,
-       .tiocmget =             pl2303_tiocmget,
-       .tiocmset =             pl2303_tiocmset,
-       .read_bulk_callback =   pl2303_read_bulk_callback,
-       .read_int_callback =    pl2303_read_int_callback,
-       .write_bulk_callback =  pl2303_write_bulk_callback,
-       .write_room =           pl2303_write_room,
-       .chars_in_buffer =      pl2303_chars_in_buffer,
-       .attach =               pl2303_startup,
-       .shutdown =             pl2303_shutdown,
-};
 
 enum pl2303_type {
        type_0,         /* don't know the difference between type 0 and */
@@ -204,6 +145,164 @@ struct pl2303_private {
        enum pl2303_type type;
 };
 
+/*
+ * pl2303_buf_alloc
+ *
+ * Allocate a circular buffer and all associated memory.
+ */
+static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
+{
+       struct pl2303_buf *pb;
+
+       if (size == 0)
+               return NULL;
+
+       pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
+       if (pb == NULL)
+               return NULL;
+
+       pb->buf_buf = kmalloc(size, GFP_KERNEL);
+       if (pb->buf_buf == NULL) {
+               kfree(pb);
+               return NULL;
+       }
+
+       pb->buf_size = size;
+       pb->buf_get = pb->buf_put = pb->buf_buf;
+
+       return pb;
+}
+
+/*
+ * pl2303_buf_free
+ *
+ * Free the buffer and all associated memory.
+ */
+static void pl2303_buf_free(struct pl2303_buf *pb)
+{
+       if (pb) {
+               kfree(pb->buf_buf);
+               kfree(pb);
+       }
+}
+
+/*
+ * pl2303_buf_clear
+ *
+ * Clear out all data in the circular buffer.
+ */
+static void pl2303_buf_clear(struct pl2303_buf *pb)
+{
+       if (pb != NULL)
+               pb->buf_get = pb->buf_put;
+               /* equivalent to a get of all data available */
+}
+
+/*
+ * pl2303_buf_data_avail
+ *
+ * Return the number of bytes of data available in the circular
+ * buffer.
+ */
+static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
+{
+       if (pb == NULL)
+               return 0;
+
+       return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
+}
+
+/*
+ * pl2303_buf_space_avail
+ *
+ * Return the number of bytes of space available in the circular
+ * buffer.
+ */
+static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
+{
+       if (pb == NULL)
+               return 0;
+
+       return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
+}
+
+/*
+ * pl2303_buf_put
+ *
+ * Copy data data from a user buffer and put it into the circular buffer.
+ * Restrict to the amount of space available.
+ *
+ * Return the number of bytes copied.
+ */
+static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
+                                  unsigned int count)
+{
+       unsigned int len;
+
+       if (pb == NULL)
+               return 0;
+
+       len  = pl2303_buf_space_avail(pb);
+       if (count > len)
+               count = len;
+
+       if (count == 0)
+               return 0;
+
+       len = pb->buf_buf + pb->buf_size - pb->buf_put;
+       if (count > len) {
+               memcpy(pb->buf_put, buf, len);
+               memcpy(pb->buf_buf, buf+len, count - len);
+               pb->buf_put = pb->buf_buf + count - len;
+       } else {
+               memcpy(pb->buf_put, buf, count);
+               if (count < len)
+                       pb->buf_put += count;
+               else /* count == len */
+                       pb->buf_put = pb->buf_buf;
+       }
+
+       return count;
+}
+
+/*
+ * pl2303_buf_get
+ *
+ * Get data from the circular buffer and copy to the given buffer.
+ * Restrict to the amount of data available.
+ *
+ * Return the number of bytes copied.
+ */
+static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
+                                  unsigned int count)
+{
+       unsigned int len;
+
+       if (pb == NULL)
+               return 0;
+
+       len = pl2303_buf_data_avail(pb);
+       if (count > len)
+               count = len;
+
+       if (count == 0)
+               return 0;
+
+       len = pb->buf_buf + pb->buf_size - pb->buf_get;
+       if (count > len) {
+               memcpy(buf, pb->buf_get, len);
+               memcpy(buf+len, pb->buf_buf, count - len);
+               pb->buf_get = pb->buf_buf + count - len;
+       } else {
+               memcpy(buf, pb->buf_get, count);
+               if (count < len)
+                       pb->buf_get += count;
+               else /* count == len */
+                       pb->buf_get = pb->buf_buf;
+       }
+
+       return count;
+}
 
 static int pl2303_startup(struct usb_serial *serial)
 {
@@ -258,26 +357,6 @@ static int set_control_lines(struct usb_device *dev, u8 value)
        return retval;
 }
 
-static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
-                       int count)
-{
-       struct pl2303_private *priv = usb_get_serial_port_data(port);
-       unsigned long flags;
-
-       dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
-
-       if (!count)
-               return count;
-
-       spin_lock_irqsave(&priv->lock, flags);
-       count = pl2303_buf_put(priv->buf, buf, count);
-       spin_unlock_irqrestore(&priv->lock, flags);
-
-       pl2303_send(port);
-
-       return count;
-}
-
 static void pl2303_send(struct usb_serial_port *port)
 {
        int count, result;
@@ -321,6 +400,26 @@ static void pl2303_send(struct usb_serial_port *port)
        usb_serial_port_softint(port);
 }
 
+static int pl2303_write(struct usb_serial_port *port, const unsigned char *buf,
+                       int count)
+{
+       struct pl2303_private *priv = usb_get_serial_port_data(port);
+       unsigned long flags;
+
+       dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
+
+       if (!count)
+               return count;
+
+       spin_lock_irqsave(&priv->lock, flags);
+       count = pl2303_buf_put(priv->buf, buf, count);
+       spin_unlock_irqrestore(&priv->lock, flags);
+
+       pl2303_send(port);
+
+       return count;
+}
+
 static int pl2303_write_room(struct usb_serial_port *port)
 {
        struct pl2303_private *priv = usb_get_serial_port_data(port);
@@ -520,6 +619,70 @@ static void pl2303_set_termios(struct usb_serial_port *port,
        kfree(buf);
 }
 
+static void pl2303_close(struct usb_serial_port *port, struct file *filp)
+{
+       struct pl2303_private *priv = usb_get_serial_port_data(port);
+       unsigned long flags;
+       unsigned int c_cflag;
+       int bps;
+       long timeout;
+       wait_queue_t wait;
+
+       dbg("%s - port %d", __FUNCTION__, port->number);
+
+       /* wait for data to drain from the buffer */
+       spin_lock_irqsave(&priv->lock, flags);
+       timeout = PL2303_CLOSING_WAIT;
+       init_waitqueue_entry(&wait, current);
+       add_wait_queue(&port->tty->write_wait, &wait);
+       for (;;) {
+               set_current_state(TASK_INTERRUPTIBLE);
+               if (pl2303_buf_data_avail(priv->buf) == 0 ||
+                   timeout == 0 || signal_pending(current) ||
+                   !usb_get_intfdata(port->serial->interface)) /* disconnect */
+                       break;
+               spin_unlock_irqrestore(&priv->lock, flags);
+               timeout = schedule_timeout(timeout);
+               spin_lock_irqsave(&priv->lock, flags);
+       }
+       set_current_state(TASK_RUNNING);
+       remove_wait_queue(&port->tty->write_wait, &wait);
+       /* clear out any remaining data in the buffer */
+       pl2303_buf_clear(priv->buf);
+       spin_unlock_irqrestore(&priv->lock, flags);
+
+       /* wait for characters to drain from the device */
+       /* (this is long enough for the entire 256 byte */
+       /* pl2303 hardware buffer to drain with no flow */
+       /* control for data rates of 1200 bps or more, */
+       /* for lower rates we should really know how much */
+       /* data is in the buffer to compute a delay */
+       /* that is not unnecessarily long) */
+       bps = tty_get_baud_rate(port->tty);
+       if (bps > 1200)
+               timeout = max((HZ*2560)/bps,HZ/10);
+       else
+               timeout = 2*HZ;
+       schedule_timeout_interruptible(timeout);
+
+       /* shutdown our urbs */
+       dbg("%s - shutting down urbs", __FUNCTION__);
+       usb_kill_urb(port->write_urb);
+       usb_kill_urb(port->read_urb);
+       usb_kill_urb(port->interrupt_in_urb);
+
+       if (port->tty) {
+               c_cflag = port->tty->termios->c_cflag;
+               if (c_cflag & HUPCL) {
+                       /* drop DTR and RTS */
+                       spin_lock_irqsave(&priv->lock, flags);
+                       priv->line_control = 0;
+                       spin_unlock_irqrestore(&priv->lock, flags);
+                       set_control_lines(port->serial->dev, 0);
+               }
+       }
+}
+
 static int pl2303_open(struct usb_serial_port *port, struct file *filp)
 {
        struct termios tmp_termios;
@@ -601,70 +764,6 @@ static int pl2303_open(struct usb_serial_port *port, struct file *filp)
        return 0;
 }
 
-static void pl2303_close(struct usb_serial_port *port, struct file *filp)
-{
-       struct pl2303_private *priv = usb_get_serial_port_data(port);
-       unsigned long flags;
-       unsigned int c_cflag;
-       int bps;
-       long timeout;
-       wait_queue_t wait;
-
-       dbg("%s - port %d", __FUNCTION__, port->number);
-
-       /* wait for data to drain from the buffer */
-       spin_lock_irqsave(&priv->lock, flags);
-       timeout = PL2303_CLOSING_WAIT;
-       init_waitqueue_entry(&wait, current);
-       add_wait_queue(&port->tty->write_wait, &wait);
-       for (;;) {
-               set_current_state(TASK_INTERRUPTIBLE);
-               if (pl2303_buf_data_avail(priv->buf) == 0 ||
-                   timeout == 0 || signal_pending(current) ||
-                   !usb_get_intfdata(port->serial->interface)) /* disconnect */
-                       break;
-               spin_unlock_irqrestore(&priv->lock, flags);
-               timeout = schedule_timeout(timeout);
-               spin_lock_irqsave(&priv->lock, flags);
-       }
-       set_current_state(TASK_RUNNING);
-       remove_wait_queue(&port->tty->write_wait, &wait);
-       /* clear out any remaining data in the buffer */
-       pl2303_buf_clear(priv->buf);
-       spin_unlock_irqrestore(&priv->lock, flags);
-
-       /* wait for characters to drain from the device */
-       /* (this is long enough for the entire 256 byte */
-       /* pl2303 hardware buffer to drain with no flow */
-       /* control for data rates of 1200 bps or more, */
-       /* for lower rates we should really know how much */
-       /* data is in the buffer to compute a delay */
-       /* that is not unnecessarily long) */
-       bps = tty_get_baud_rate(port->tty);
-       if (bps > 1200)
-               timeout = max((HZ*2560)/bps,HZ/10);
-       else
-               timeout = 2*HZ;
-       schedule_timeout_interruptible(timeout);
-
-       /* shutdown our urbs */
-       dbg("%s - shutting down urbs", __FUNCTION__);
-       usb_kill_urb(port->write_urb);
-       usb_kill_urb(port->read_urb);
-       usb_kill_urb(port->interrupt_in_urb);
-
-       if (port->tty) {
-               c_cflag = port->tty->termios->c_cflag;
-               if (c_cflag & HUPCL) {
-                       /* drop DTR and RTS */
-                       spin_lock_irqsave(&priv->lock, flags);
-                       priv->line_control = 0;
-                       spin_unlock_irqrestore(&priv->lock, flags);
-                       set_control_lines(port->serial->dev, 0);
-               }
-       }
-}
-
 static int pl2303_tiocmset(struct usb_serial_port *port, struct file *file,
                           unsigned int set, unsigned int clear)
 {
@@ -1003,164 +1102,33 @@ static void pl2303_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
        pl2303_send(port);
 }
 
-/*
- * pl2303_buf_alloc
- *
- * Allocate a circular buffer and all associated memory.
- */
-static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
-{
-       struct pl2303_buf *pb;
-
-       if (size == 0)
-               return NULL;
-
-       pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
-       if (pb == NULL)
-               return NULL;
-
-       pb->buf_buf = kmalloc(size, GFP_KERNEL);
-       if (pb->buf_buf == NULL) {
-               kfree(pb);
-               return NULL;
-       }
-
-       pb->buf_size = size;
-       pb->buf_get = pb->buf_put = pb->buf_buf;
-
-       return pb;
-}
-
-/*
- * pl2303_buf_free
- *
- * Free the buffer and all associated memory.
- */
-static void pl2303_buf_free(struct pl2303_buf *pb)
-{
-       if (pb) {
-               kfree(pb->buf_buf);
-               kfree(pb);
-       }
-}
-
-/*
- * pl2303_buf_clear
- *
- * Clear out all data in the circular buffer.
- */
-static void pl2303_buf_clear(struct pl2303_buf *pb)
-{
-       if (pb != NULL)
-               pb->buf_get = pb->buf_put;
-               /* equivalent to a get of all data available */
-}
-
-/*
- * pl2303_buf_data_avail
- *
- * Return the number of bytes of data available in the circular
- * buffer.
- */
-static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
-{
-       if (pb == NULL)
-               return 0;
-
-       return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
-}
-
-/*
- * pl2303_buf_space_avail
- *
- * Return the number of bytes of space available in the circular
- * buffer.
- */
-static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
-{
-       if (pb == NULL)
-               return 0;
-
-       return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
-}
-
-/*
- * pl2303_buf_put
- *
- * Copy data data from a user buffer and put it into the circular buffer.
- * Restrict to the amount of space available.
- *
- * Return the number of bytes copied.
- */
-static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
-                                  unsigned int count)
-{
-       unsigned int len;
-
-       if (pb == NULL)
-               return 0;
-
-       len  = pl2303_buf_space_avail(pb);
-       if (count > len)
-               count = len;
-
-       if (count == 0)
-               return 0;
-
-       len = pb->buf_buf + pb->buf_size - pb->buf_put;
-       if (count > len) {
-               memcpy(pb->buf_put, buf, len);
-               memcpy(pb->buf_buf, buf+len, count - len);
-               pb->buf_put = pb->buf_buf + count - len;
-       } else {
-               memcpy(pb->buf_put, buf, count);
-               if (count < len)
-                       pb->buf_put += count;
-               else /* count == len */
-                       pb->buf_put = pb->buf_buf;
-       }
-
-       return count;
-}
-
-/*
- * pl2303_buf_get
- *
- * Get data from the circular buffer and copy to the given buffer.
- * Restrict to the amount of data available.
- *
- * Return the number of bytes copied.
- */
-static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
-                                  unsigned int count)
-{
-       unsigned int len;
-
-       if (pb == NULL)
-               return 0;
-
-       len = pl2303_buf_data_avail(pb);
-       if (count > len)
-               count = len;
-
-       if (count == 0)
-               return 0;
-
-       len = pb->buf_buf + pb->buf_size - pb->buf_get;
-       if (count > len) {
-               memcpy(buf, pb->buf_get, len);
-               memcpy(buf+len, pb->buf_buf, count - len);
-               pb->buf_get = pb->buf_buf + count - len;
-       } else {
-               memcpy(buf, pb->buf_get, count);
-               if (count < len)
-                       pb->buf_get += count;
-               else /* count == len */
-                       pb->buf_get = pb->buf_buf;
-       }
-
-       return count;
-}
+/* All of the device info needed for the PL2303 SIO serial converter */
+static struct usb_serial_driver pl2303_device = {
+       .driver = {
+               .owner =        THIS_MODULE,
+               .name =         "pl2303",
+       },
+       .id_table =             id_table,
+       .num_interrupt_in =     NUM_DONT_CARE,
+       .num_bulk_in =          1,
+       .num_bulk_out =         1,
+       .num_ports =            1,
+       .open =                 pl2303_open,
+       .close =                pl2303_close,
+       .write =                pl2303_write,
+       .ioctl =                pl2303_ioctl,
+       .break_ctl =            pl2303_break_ctl,
+       .set_termios =          pl2303_set_termios,
+       .tiocmget =             pl2303_tiocmget,
+       .tiocmset =             pl2303_tiocmset,
+       .read_bulk_callback =   pl2303_read_bulk_callback,
+       .read_int_callback =    pl2303_read_int_callback,
+       .write_bulk_callback =  pl2303_write_bulk_callback,
+       .write_room =           pl2303_write_room,
+       .chars_in_buffer =      pl2303_chars_in_buffer,
+       .attach =               pl2303_startup,
+       .shutdown =             pl2303_shutdown,
+};
 
 static int __init pl2303_init(void)
 {