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Commit 572d3138 authored by Thiago Galesi's avatar Thiago Galesi Committed by Greg Kroah-Hartman
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USB: pl2303: reduce number of prototypes 



Reduce number of needed prototypes in Prolific pl2303 driver

Signed-off-by: default avatarThiago Galesi <thiagogalesi@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 10a18cd1

drivers/usb/serial/pl2303.c

+271 −303
Original line number Diff line number Diff line
@@ -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);
@@ -516,8 +615,72 @@ static void pl2303_set_termios(struct usb_serial_port *port, 
				    0x0, index, NULL, 0, 100);

		dbg("0x40:0x1:0x0:0x%x  %d", index, i);

	}



	kfree(buf);



	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)
@@ -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)

{