USB: pl2303: reduce number of prototypes

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>

1 files changed, 269 insertions, 301 deletions

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 0cd42bf4c6c8..e2d8f9b94eed 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -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)
 {