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提交 572d3138 编写于 作者: T Thiago Galesi 提交者： 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: NThiago Galesi <thiagogalesi@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
上级 10a18cd1
隐藏空白更改
内联 并排
Showing with 271 addition and 303 deletion
drivers/usb/serial/pl2303.c
浏览文件 @ 572d3138
......@@ -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)
{
......
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