Commit ccfe8188 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
Browse files

USB: pl2303: clean up driver somewhat



Use u16 rather than __u16.
Fix multi-line comment style.
Remove some comments.
Remove unnecessary whitespace and add some where appropriate.
Drop DRIVER_DESC define.
Merge and simplify multi-line error message.

Signed-off-by: default avatarJohan Hovold <jhovold@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 71c671bf
......@@ -12,7 +12,6 @@
*
* See Documentation/usb/usb-serial.txt for more information on using this
* driver
*
*/
#include <linux/kernel.h>
......@@ -32,11 +31,6 @@
#include <asm/unaligned.h>
#include "pl2303.h"
/*
* Version Information
*/
#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
......@@ -146,27 +140,34 @@ struct pl2303_private {
u8 line_settings[7];
};
static int pl2303_vendor_read(__u16 value, __u16 index,
static int pl2303_vendor_read(u16 value, u16 index,
struct usb_serial *serial, unsigned char *buf)
{
int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
int res;
res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
value, index, buf, 1, 100);
dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n",
VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
res, buf[0]);
return res;
}
static int pl2303_vendor_write(__u16 value, __u16 index,
struct usb_serial *serial)
static int pl2303_vendor_write(u16 value, u16 index, struct usb_serial *serial)
{
int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
int res;
res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
value, index, NULL, 0, 100);
dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n",
VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
res);
return res;
}
......@@ -215,14 +216,14 @@ static int pl2303_startup(struct usb_serial *serial)
pl2303_vendor_write(2, 0x24, serial);
kfree(buf);
return 0;
}
static void pl2303_release(struct usb_serial *serial)
{
struct pl2303_serial_private *spriv;
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
spriv = usb_get_serial_data(serial);
kfree(spriv);
}
......@@ -245,9 +246,8 @@ static int pl2303_port_probe(struct usb_serial_port *port)
static int pl2303_port_remove(struct usb_serial_port *port)
{
struct pl2303_private *priv;
struct pl2303_private *priv = usb_get_serial_port_data(port);
priv = usb_get_serial_port_data(port);
kfree(priv);
return 0;
......@@ -261,8 +261,10 @@ static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
value, 0, NULL, 0, 100);
dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
value, retval);
return retval;
}
......@@ -488,13 +490,13 @@ static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
u8 control;
spin_lock_irqsave(&priv->lock, flags);
/* Change DTR and RTS */
if (on)
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
else
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
control = priv->line_control;
spin_unlock_irqrestore(&priv->lock, flags);
pl2303_set_control_lines(port, control);
}
......@@ -525,8 +527,8 @@ static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result) {
dev_err(&port->dev, "%s - failed submitting interrupt urb,"
" error %d\n", __func__, result);
dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
result);
return result;
}
......@@ -596,8 +598,10 @@ static int pl2303_tiocmget(struct tty_struct *tty)
static int pl2303_carrier_raised(struct usb_serial_port *port)
{
struct pl2303_private *priv = usb_get_serial_port_data(port);
if (priv->line_status & UART_DCD)
return 1;
return 0;
}
......@@ -662,6 +666,7 @@ static int pl2303_ioctl(struct tty_struct *tty,
default:
break;
}
return -ENOIOCTLCMD;
}
......@@ -676,6 +681,7 @@ static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
state = BREAK_OFF;
else
state = BREAK_ON;
dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
state == BREAK_OFF ? "off" : "on");
......@@ -690,7 +696,6 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
unsigned char *data,
unsigned int actual_length)
{
struct pl2303_private *priv = usb_get_serial_port_data(port);
struct tty_struct *tty;
unsigned long flags;
......@@ -702,12 +707,10 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
if (idv == SIEMENS_VENDOR_ID) {
if (idp == SIEMENS_PRODUCT_ID_X65 ||
idp == SIEMENS_PRODUCT_ID_SX1 ||
idp == SIEMENS_PRODUCT_ID_X75) {
length = 1;
status_idx = 0;
}
......@@ -721,8 +724,10 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
prev_line_status = priv->line_status;
priv->line_status = data[status_idx];
spin_unlock_irqrestore(&priv->lock, flags);
if (priv->line_status & UART_BREAK_ERROR)
usb_serial_handle_break(port);
wake_up_interruptible(&port->port.delta_msr_wait);
tty = tty_port_tty_get(&port->port);
......@@ -766,10 +771,11 @@ static void pl2303_read_int_callback(struct urb *urb)
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval)
if (retval) {
dev_err(&port->dev,
"%s - usb_submit_urb failed with result %d\n",
__func__, retval);
}
}
static void pl2303_process_read_urb(struct urb *urb)
......@@ -791,8 +797,10 @@ static void pl2303_process_read_urb(struct urb *urb)
if (!urb->actual_length)
return;
/* break takes precedence over parity, */
/* which takes precedence over framing errors */
/*
* Break takes precedence over parity, which takes precedence over
* framing errors.
*/
if (line_status & UART_BREAK_ERROR)
tty_flag = TTY_BREAK;
else if (line_status & UART_PARITY_ERROR)
......@@ -820,7 +828,6 @@ static void pl2303_process_read_urb(struct urb *urb)
tty_flip_buffer_push(&port->port);
}
/* All of the device info needed for the PL2303 SIO serial converter */
static struct usb_serial_driver pl2303_device = {
.driver = {
.owner = THIS_MODULE,
......@@ -832,7 +839,7 @@ static struct usb_serial_driver pl2303_device = {
.bulk_out_size = 256,
.open = pl2303_open,
.close = pl2303_close,
.dtr_rts = pl2303_dtr_rts,
.dtr_rts = pl2303_dtr_rts,
.carrier_raised = pl2303_carrier_raised,
.ioctl = pl2303_ioctl,
.break_ctl = pl2303_break_ctl,
......@@ -854,5 +861,5 @@ static struct usb_serial_driver * const serial_drivers[] = {
module_usb_serial_driver(serial_drivers, id_table);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
MODULE_LICENSE("GPL");
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