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Commit 9e033bb9 authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
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[PATCH] USB: add error reporting functionality to the pl2303 driver.

parent 5fa6d320
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Showing with 65 additions and 14 deletions
drivers/usb/serial/pl2303.c
View file @ 9e033bb9
/*
* Prolific PL2303 USB to serial adaptor driver
*
* Copyright (C) 2001-2002 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2003 IBM Corp.
*
* Original driver for 2.2.x by anonymous
*
......@@ -111,6 +112,16 @@ static struct usb_driver pl2303_driver = {
#define VENDOR_READ_REQUEST_TYPE 0xc0
#define VENDOR_READ_REQUEST 0x01
#define UART_STATE 0x08
#define UART_DCD 0x01
#define UART_DSR 0x02
#define UART_BREAK_ERROR 0x04
#define UART_RING 0x08
#define UART_FRAME_ERROR 0x10
#define UART_PARITY_ERROR 0x20
#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);
......@@ -158,6 +169,7 @@ static struct usb_serial_device_type pl2303_device = {
struct pl2303_private {
spinlock_t lock;
u8 line_control;
u8 line_status;
u8 termios_initialized;
};
......@@ -227,6 +239,7 @@ static void pl2303_set_termios (struct usb_serial_port *port, struct termios *ol
{
struct usb_serial *serial = port->serial;
struct pl2303_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
unsigned int cflag;
unsigned char *buf;
int baud;
......@@ -239,13 +252,13 @@ static void pl2303_set_termios (struct usb_serial_port *port, struct termios *ol
return;
}
spin_lock(&priv->lock);
spin_lock_irqsave(&priv->lock, flags);
if (!priv->termios_initialized) {
*(port->tty->termios) = tty_std_termios;
port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
priv->termios_initialized = 1;
}
spin_unlock(&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
cflag = port->tty->termios->c_cflag;
/* check that they really want us to change something */
......@@ -355,13 +368,13 @@ static void pl2303_set_termios (struct usb_serial_port *port, struct termios *ol
if (cflag && CBAUD) {
u8 control;
spin_lock (&priv->lock);
spin_lock_irqsave(&priv->lock, flags);
if ((cflag && CBAUD) == B0)
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
else
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
control = priv->line_control;
spin_unlock (&priv->lock);
spin_unlock_irqrestore(&priv->lock, flags);
set_control_lines (serial->dev, control);
}
......@@ -450,6 +463,7 @@ static void pl2303_close (struct usb_serial_port *port, struct file *filp)
{
struct usb_serial *serial;
struct pl2303_private *priv;
unsigned long flags;
unsigned int c_cflag;
int result;
......@@ -486,9 +500,9 @@ static void pl2303_close (struct usb_serial_port *port, struct file *filp)
if (c_cflag & HUPCL) {
/* drop DTR and RTS */
priv = usb_get_serial_port_data(port);
spin_lock (&priv->lock);
spin_lock_irqsave(&priv->lock, flags);
priv->line_control = 0;
spin_unlock (&priv->lock);
spin_unlock_irqrestore (&priv->lock, flags);
set_control_lines (port->serial->dev, 0);
}
}
......@@ -499,9 +513,10 @@ static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
unsigned int set, unsigned int clear)
{
struct pl2303_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
u8 control;
spin_lock (&priv->lock);
spin_lock_irqsave (&priv->lock, flags);
if (set & TIOCM_RTS)
priv->line_control |= CONTROL_RTS;
if (set & TIOCM_DTR)
......@@ -511,7 +526,7 @@ static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
if (clear & TIOCM_DTR)
priv->line_control &= ~CONTROL_DTR;
control = priv->line_control;
spin_unlock (&priv->lock);
spin_unlock_irqrestore (&priv->lock, flags);
return set_control_lines (port->serial->dev, control);
}
......@@ -519,14 +534,15 @@ static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
{
struct pl2303_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
unsigned int mcr;
unsigned int result;
dbg("%s (%d)", __FUNCTION__, port->number);
spin_lock (&priv->lock);
spin_lock_irqsave (&priv->lock, flags);
mcr = priv->line_control;
spin_unlock (&priv->lock);
spin_unlock_irqrestore (&priv->lock, flags);
result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
| ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0);
......@@ -588,9 +604,13 @@ static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
{
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
//unsigned char *data = urb->transfer_buffer;
struct pl2303_private *priv = usb_get_serial_port_data(port);
unsigned char *data = urb->transfer_buffer;
unsigned long flags;
int status;
dbg("%s (%d)", __FUNCTION__, port->number);
switch (urb->status) {
case 0:
/* success */
......@@ -612,8 +632,14 @@ static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
//FIXME need to update state of terminal lines variable
if (urb->actual_length > UART_STATE)
goto exit;
/* Save off the uart status for others to look at */
spin_lock_irqsave(&priv->lock, flags);
priv->line_status = data[UART_STATE];
spin_unlock_irqrestore(&priv->lock, flags);
exit:
status = usb_submit_urb (urb, GFP_ATOMIC);
if (status)
......@@ -626,10 +652,14 @@ static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
{
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
struct usb_serial *serial = get_usb_serial (port, __FUNCTION__);
struct pl2303_private *priv = usb_get_serial_port_data(port);
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
unsigned long flags;
int i;
int result;
u8 status;
char tty_flag;
if (port_paranoia_check (port, __FUNCTION__))
return;
......@@ -663,13 +693,34 @@ static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data);
/* get tty_flag from status */
tty_flag = TTY_NORMAL;
spin_lock_irqsave(&priv->lock, flags);
status = priv->line_status;
spin_unlock_irqrestore(&priv->lock, flags);
/* break takes precedence over parity, */
/* which takes precedence over framing errors */
if (status & UART_BREAK_ERROR )
tty_flag = TTY_BREAK;
else if (status & UART_PARITY_ERROR)
tty_flag = TTY_PARITY;
else if (status & UART_FRAME_ERROR)
tty_flag = TTY_FRAME;
dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
tty = port->tty;
if (tty && urb->actual_length) {
/* overrun is special, not associated with a char */
if (status & UART_OVERRUN_ERROR)
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
for (i = 0; i < urb->actual_length; ++i) {
if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
tty_flip_buffer_push(tty);
}
tty_insert_flip_char (tty, data[i], 0);
tty_insert_flip_char (tty, data[i], tty_flag);
}
tty_flip_buffer_push (tty);
}
......
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