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path: root/drivers/usb/serial/pl2303.c
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Diffstat (limited to 'drivers/usb/serial/pl2303.c')
-rw-r--r--drivers/usb/serial/pl2303.c90
1 files changed, 34 insertions, 56 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 83dfae93a45d..f9f85f56f0db 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -1,14 +1,14 @@
/*
* Prolific PL2303 USB to serial adaptor driver
*
- * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2003 IBM Corp.
*
* Original driver for 2.2.x by anonymous
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
*
* See Documentation/usb/usb-serial.txt for more information on using this driver
*
@@ -484,15 +484,6 @@ static void pl2303_set_termios(struct usb_serial_port *port,
spin_unlock_irqrestore(&priv->lock, flags);
cflag = port->tty->termios->c_cflag;
- /* check that they really want us to change something */
- if (old_termios) {
- if ((cflag == old_termios->c_cflag) &&
- (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
- RELEVANT_IFLAG(old_termios->c_iflag))) {
- dbg("%s - nothing to change...", __FUNCTION__);
- return;
- }
- }
buf = kzalloc(7, GFP_KERNEL);
if (!buf) {
@@ -517,29 +508,7 @@ static void pl2303_set_termios(struct usb_serial_port *port,
dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
}
- baud = 0;
- switch (cflag & CBAUD) {
- case B0: baud = 0; break;
- case B75: baud = 75; break;
- case B150: baud = 150; break;
- case B300: baud = 300; break;
- case B600: baud = 600; break;
- case B1200: baud = 1200; break;
- case B1800: baud = 1800; break;
- case B2400: baud = 2400; break;
- case B4800: baud = 4800; break;
- case B9600: baud = 9600; break;
- case B19200: baud = 19200; break;
- case B38400: baud = 38400; break;
- case B57600: baud = 57600; break;
- case B115200: baud = 115200; break;
- case B230400: baud = 230400; break;
- case B460800: baud = 460800; break;
- default:
- dev_err(&port->dev, "pl2303 driver does not support"
- " the baudrate requested (fix it)\n");
- break;
- }
+ baud = tty_get_baud_rate(port->tty);;
dbg("%s - baud = %d", __FUNCTION__, baud);
if (baud) {
buf[0] = baud & 0xff;
@@ -617,6 +586,13 @@ static void pl2303_set_termios(struct usb_serial_port *port,
VENDOR_WRITE_REQUEST_TYPE,
0x0, index, NULL, 0, 100);
dbg("0x40:0x1:0x0:0x%x %d", index, i);
+ } else {
+ i = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev, 0),
+ VENDOR_WRITE_REQUEST,
+ VENDOR_WRITE_REQUEST_TYPE,
+ 0x0, 0x0, NULL, 0, 100);
+ dbg ("0x40:0x1:0x0:0x0 %d", i);
}
kfree(buf);
@@ -954,11 +930,12 @@ static void pl2303_read_int_callback(struct urb *urb)
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
unsigned char *data = urb->transfer_buffer;
unsigned int actual_length = urb->actual_length;
- int status;
+ int status = urb->status;
+ int retval;
dbg("%s (%d)", __FUNCTION__, port->number);
- switch (urb->status) {
+ switch (status) {
case 0:
/* success */
break;
@@ -967,11 +944,11 @@ static void pl2303_read_int_callback(struct urb *urb)
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d", __FUNCTION__,
- urb->status);
+ status);
return;
default:
dbg("%s - nonzero urb status received: %d", __FUNCTION__,
- urb->status);
+ status);
goto exit;
}
@@ -981,11 +958,11 @@ static void pl2303_read_int_callback(struct urb *urb)
pl2303_update_line_status(port, data, actual_length);
exit:
- status = usb_submit_urb(urb, GFP_ATOMIC);
- if (status)
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ if (retval)
dev_err(&urb->dev->dev,
"%s - usb_submit_urb failed with result %d\n",
- __FUNCTION__, status);
+ __FUNCTION__, retval);
}
static void pl2303_read_bulk_callback(struct urb *urb)
@@ -997,23 +974,23 @@ static void pl2303_read_bulk_callback(struct urb *urb)
unsigned long flags;
int i;
int result;
- u8 status;
+ int status = urb->status;
+ u8 line_status;
char tty_flag;
dbg("%s - port %d", __FUNCTION__, port->number);
- if (urb->status) {
- dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
+ if (status) {
+ dbg("%s - urb status = %d", __FUNCTION__, status);
if (!port->open_count) {
dbg("%s - port is closed, exiting.", __FUNCTION__);
return;
}
- if (urb->status == -EPROTO) {
+ if (status == -EPROTO) {
/* PL2303 mysteriously fails with -EPROTO reschedule
* the read */
dbg("%s - caught -EPROTO, resubmitting the urb",
__FUNCTION__);
- urb->status = 0;
urb->dev = port->serial->dev;
result = usb_submit_urb(urb, GFP_ATOMIC);
if (result)
@@ -1033,18 +1010,18 @@ static void pl2303_read_bulk_callback(struct urb *urb)
tty_flag = TTY_NORMAL;
spin_lock_irqsave(&priv->lock, flags);
- status = priv->line_status;
+ line_status = priv->line_status;
priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
spin_unlock_irqrestore(&priv->lock, flags);
wake_up_interruptible(&priv->delta_msr_wait);
/* break takes precedence over parity, */
/* which takes precedence over framing errors */
- if (status & UART_BREAK_ERROR )
+ if (line_status & UART_BREAK_ERROR )
tty_flag = TTY_BREAK;
- else if (status & UART_PARITY_ERROR)
+ else if (line_status & UART_PARITY_ERROR)
tty_flag = TTY_PARITY;
- else if (status & UART_FRAME_ERROR)
+ else if (line_status & UART_FRAME_ERROR)
tty_flag = TTY_FRAME;
dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
@@ -1052,7 +1029,7 @@ static void pl2303_read_bulk_callback(struct urb *urb)
if (tty && urb->actual_length) {
tty_buffer_request_room(tty, urb->actual_length + 1);
/* overrun is special, not associated with a char */
- if (status & UART_OVERRUN_ERROR)
+ if (line_status & UART_OVERRUN_ERROR)
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
for (i = 0; i < urb->actual_length; ++i)
tty_insert_flip_char(tty, data[i], tty_flag);
@@ -1076,10 +1053,11 @@ static void pl2303_write_bulk_callback(struct urb *urb)
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
struct pl2303_private *priv = usb_get_serial_port_data(port);
int result;
+ int status = urb->status;
dbg("%s - port %d", __FUNCTION__, port->number);
- switch (urb->status) {
+ switch (status) {
case 0:
/* success */
break;
@@ -1088,14 +1066,14 @@ static void pl2303_write_bulk_callback(struct urb *urb)
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d", __FUNCTION__,
- urb->status);
+ status);
priv->write_urb_in_use = 0;
return;
default:
/* error in the urb, so we have to resubmit it */
dbg("%s - Overflow in write", __FUNCTION__);
dbg("%s - nonzero write bulk status received: %d", __FUNCTION__,
- urb->status);
+ status);
port->write_urb->transfer_buffer_length = 1;
port->write_urb->dev = port->serial->dev;
result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 03:20:03 +0100