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Diffstat (limited to 'drivers/usb/serial/belkin_sa.c')
-rw-r--r--drivers/usb/serial/belkin_sa.c295
1 files changed, 96 insertions, 199 deletions
diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
index 2bfd6dd85b5..15bc71853db 100644
--- a/drivers/usb/serial/belkin_sa.c
+++ b/drivers/usb/serial/belkin_sa.c
@@ -2,72 +2,29 @@
* Belkin USB Serial Adapter Driver
*
* Copyright (C) 2000 William Greathouse (wgreathouse@smva.com)
- * Copyright (C) 2000-2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2000-2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com)
*
* This program is largely derived from work by the linux-usb group
* and associated source files. Please see the usb/serial files for
* individual credits and copyrights.
*
- * 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, or
- * (at your option) any later version.
+ * 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, or
+ * (at your option) any later version.
*
* See Documentation/usb/usb-serial.txt for more information on using this
* driver
*
* TODO:
- * -- Add true modem contol line query capability. Currently we track the
+ * -- Add true modem control line query capability. Currently we track the
* states reported by the interrupt and the states we request.
- * -- Add error reporting back to application for UART error conditions.
- * Just point me at how to implement this and I'll do it. I've put the
- * framework in, but haven't analyzed the "tty_flip" interface yet.
* -- Add support for flush commands
- * -- Add everything that is missing :)
- *
- * 27-Nov-2001 gkh
- * compressed all the differnent device entries into 1.
- *
- * 30-May-2001 gkh
- * switched from using spinlock to a semaphore, which fixes lots of
- * problems.
- *
- * 08-Apr-2001 gb
- * - Identify version on module load.
- *
- * 12-Mar-2001 gkh
- * - Added support for the GoHubs GO-COM232 device which is the same as the
- * Peracom device.
- *
- * 06-Nov-2000 gkh
- * - Added support for the old Belkin and Peracom devices.
- * - Made the port able to be opened multiple times.
- * - Added some defaults incase the line settings are things these devices
- * can't support.
- *
- * 18-Oct-2000 William Greathouse
- * Released into the wild (linux-usb-devel)
- *
- * 17-Oct-2000 William Greathouse
- * Add code to recognize firmware version and set hardware flow control
- * appropriately. Belkin states that firmware prior to 3.05 does not
- * operate correctly in hardware handshake mode. I have verified this
- * on firmware 2.05 -- for both RTS and DTR input flow control, the control
- * line is not reset. The test performed by the Belkin Win* driver is
- * to enable hardware flow control for firmware 2.06 or greater and
- * for 1.00 or prior. I am only enabling for 2.06 or greater.
- *
- * 12-Oct-2000 William Greathouse
- * First cut at supporting Belkin USB Serial Adapter F5U103
- * I did not have a copy of the original work to support this
- * adapter, so pardon any stupid mistakes. All of the information
- * I am using to write this driver was acquired by using a modified
- * UsbSnoop on Windows2000 and from examining the other USB drivers.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
-#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
@@ -79,31 +36,26 @@
#include <linux/usb/serial.h>
#include "belkin_sa.h"
-static int debug;
-
-/*
- * Version Information
- */
-#define DRIVER_VERSION "v1.2"
#define DRIVER_AUTHOR "William Greathouse <wgreathouse@smva.com>"
#define DRIVER_DESC "USB Belkin Serial converter driver"
/* function prototypes for a Belkin USB Serial Adapter F5U103 */
-static int belkin_sa_startup(struct usb_serial *serial);
-static void belkin_sa_shutdown(struct usb_serial *serial);
+static int belkin_sa_port_probe(struct usb_serial_port *port);
+static int belkin_sa_port_remove(struct usb_serial_port *port);
static int belkin_sa_open(struct tty_struct *tty,
- struct usb_serial_port *port, struct file *filp);
+ struct usb_serial_port *port);
static void belkin_sa_close(struct usb_serial_port *port);
static void belkin_sa_read_int_callback(struct urb *urb);
+static void belkin_sa_process_read_urb(struct urb *urb);
static void belkin_sa_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios * old);
static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state);
-static int belkin_sa_tiocmget(struct tty_struct *tty, struct file *file);
-static int belkin_sa_tiocmset(struct tty_struct *tty, struct file *file,
+static int belkin_sa_tiocmget(struct tty_struct *tty);
+static int belkin_sa_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
-static struct usb_device_id id_table_combined [] = {
+static const struct usb_device_id id_table[] = {
{ USB_DEVICE(BELKIN_SA_VID, BELKIN_SA_PID) },
{ USB_DEVICE(BELKIN_OLD_VID, BELKIN_OLD_PID) },
{ USB_DEVICE(PERACOM_VID, PERACOM_PID) },
@@ -112,16 +64,7 @@ static struct usb_device_id id_table_combined [] = {
{ USB_DEVICE(BELKIN_DOCKSTATION_VID, BELKIN_DOCKSTATION_PID) },
{ } /* Terminating entry */
};
-
-MODULE_DEVICE_TABLE(usb, id_table_combined);
-
-static struct usb_driver belkin_driver = {
- .name = "belkin",
- .probe = usb_serial_probe,
- .disconnect = usb_serial_disconnect,
- .id_table = id_table_combined,
- .no_dynamic_id = 1,
-};
+MODULE_DEVICE_TABLE(usb, id_table);
/* All of the device info needed for the serial converters */
static struct usb_serial_driver belkin_device = {
@@ -130,21 +73,23 @@ static struct usb_serial_driver belkin_device = {
.name = "belkin",
},
.description = "Belkin / Peracom / GoHubs USB Serial Adapter",
- .usb_driver = &belkin_driver,
- .id_table = id_table_combined,
+ .id_table = id_table,
.num_ports = 1,
.open = belkin_sa_open,
.close = belkin_sa_close,
.read_int_callback = belkin_sa_read_int_callback,
- /* How we get the status info */
+ .process_read_urb = belkin_sa_process_read_urb,
.set_termios = belkin_sa_set_termios,
.break_ctl = belkin_sa_break_ctl,
.tiocmget = belkin_sa_tiocmget,
.tiocmset = belkin_sa_tiocmset,
- .attach = belkin_sa_startup,
- .shutdown = belkin_sa_shutdown,
+ .port_probe = belkin_sa_port_probe,
+ .port_remove = belkin_sa_port_remove,
};
+static struct usb_serial_driver * const serial_drivers[] = {
+ &belkin_device, NULL
+};
struct belkin_sa_private {
spinlock_t lock;
@@ -168,17 +113,15 @@ struct belkin_sa_private {
(c), BELKIN_SA_SET_REQUEST_TYPE, \
(v), 0, NULL, 0, WDR_TIMEOUT)
-/* do some startup allocations not currently performed by usb_serial_probe() */
-static int belkin_sa_startup(struct usb_serial *serial)
+static int belkin_sa_port_probe(struct usb_serial_port *port)
{
- struct usb_device *dev = serial->dev;
+ struct usb_device *dev = port->serial->dev;
struct belkin_sa_private *priv;
- /* allocate the private data structure */
priv = kmalloc(sizeof(struct belkin_sa_private), GFP_KERNEL);
if (!priv)
- return -1; /* error */
- /* set initial values for control structures */
+ return -ENOMEM;
+
spin_lock_init(&priv->lock);
priv->control_state = 0;
priv->last_lsr = 0;
@@ -190,69 +133,44 @@ static int belkin_sa_startup(struct usb_serial *serial)
le16_to_cpu(dev->descriptor.bcdDevice),
priv->bad_flow_control);
- init_waitqueue_head(&serial->port[0]->write_wait);
- usb_set_serial_port_data(serial->port[0], priv);
+ usb_set_serial_port_data(port, priv);
return 0;
}
-
-static void belkin_sa_shutdown(struct usb_serial *serial)
+static int belkin_sa_port_remove(struct usb_serial_port *port)
{
struct belkin_sa_private *priv;
- int i;
- dbg("%s", __func__);
+ priv = usb_get_serial_port_data(port);
+ kfree(priv);
- /* stop reads and writes on all ports */
- for (i = 0; i < serial->num_ports; ++i) {
- /* My special items, the standard routines free my urbs */
- priv = usb_get_serial_port_data(serial->port[i]);
- kfree(priv);
- }
+ return 0;
}
-
-static int belkin_sa_open(struct tty_struct *tty,
- struct usb_serial_port *port, struct file *filp)
+static int belkin_sa_open(struct tty_struct *tty,
+ struct usb_serial_port *port)
{
- int retval = 0;
-
- dbg("%s port %d", __func__, port->number);
-
- /*Start reading from the device*/
- /* TODO: Look at possibility of submitting multiple URBs to device to
- * enhance buffering. Win trace shows 16 initial read URBs.
- */
- port->read_urb->dev = port->serial->dev;
- retval = usb_submit_urb(port->read_urb, GFP_KERNEL);
- if (retval) {
- dev_err(&port->dev, "usb_submit_urb(read bulk) failed\n");
- goto exit;
- }
+ int retval;
- port->interrupt_in_urb->dev = port->serial->dev;
retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (retval) {
- usb_kill_urb(port->read_urb);
dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
+ return retval;
}
-exit:
- return retval;
-} /* belkin_sa_open */
+ retval = usb_serial_generic_open(tty, port);
+ if (retval)
+ usb_kill_urb(port->interrupt_in_urb);
+ return retval;
+}
static void belkin_sa_close(struct usb_serial_port *port)
{
- dbg("%s port %d", __func__, port->number);
-
- /* shutdown our bulk reads and writes */
- usb_kill_urb(port->write_urb);
- usb_kill_urb(port->read_urb);
+ usb_serial_generic_close(port);
usb_kill_urb(port->interrupt_in_urb);
-} /* belkin_sa_close */
-
+}
static void belkin_sa_read_int_callback(struct urb *urb)
{
@@ -271,17 +189,16 @@ static void belkin_sa_read_int_callback(struct urb *urb)
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
- dbg("%s - urb shutting down with status: %d",
- __func__, status);
+ dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
+ __func__, status);
return;
default:
- dbg("%s - nonzero urb status received: %d",
- __func__, status);
+ dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
+ __func__, status);
goto exit;
}
- usb_serial_debug_data(debug, &port->dev, __func__,
- urb->actual_length, data);
+ usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
/* Handle known interrupt data */
/* ignore data[0] and data[1] */
@@ -311,31 +228,7 @@ static void belkin_sa_read_int_callback(struct urb *urb)
else
priv->control_state &= ~TIOCM_CD;
- /* Now to report any errors */
priv->last_lsr = data[BELKIN_SA_LSR_INDEX];
-#if 0
- /*
- * fill in the flip buffer here, but I do not know the relation
- * to the current/next receive buffer or characters. I need
- * to look in to this before committing any code.
- */
- if (priv->last_lsr & BELKIN_SA_LSR_ERR) {
- tty = tty_port_tty_get(&port->port);
- /* Overrun Error */
- if (priv->last_lsr & BELKIN_SA_LSR_OE) {
- }
- /* Parity Error */
- if (priv->last_lsr & BELKIN_SA_LSR_PE) {
- }
- /* Framing Error */
- if (priv->last_lsr & BELKIN_SA_LSR_FE) {
- }
- /* Break Indicator */
- if (priv->last_lsr & BELKIN_SA_LSR_BI) {
- }
- tty_kref_put(tty);
- }
-#endif
spin_unlock_irqrestore(&priv->lock, flags);
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
@@ -344,6 +237,47 @@ exit:
"result %d\n", __func__, retval);
}
+static void belkin_sa_process_read_urb(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ struct belkin_sa_private *priv = usb_get_serial_port_data(port);
+ unsigned char *data = urb->transfer_buffer;
+ unsigned long flags;
+ unsigned char status;
+ char tty_flag;
+
+ /* Update line status */
+ tty_flag = TTY_NORMAL;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ status = priv->last_lsr;
+ priv->last_lsr &= ~BELKIN_SA_LSR_ERR;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ if (!urb->actual_length)
+ return;
+
+ if (status & BELKIN_SA_LSR_ERR) {
+ /* Break takes precedence over parity, which takes precedence
+ * over framing errors. */
+ if (status & BELKIN_SA_LSR_BI)
+ tty_flag = TTY_BREAK;
+ else if (status & BELKIN_SA_LSR_PE)
+ tty_flag = TTY_PARITY;
+ else if (status & BELKIN_SA_LSR_FE)
+ tty_flag = TTY_FRAME;
+ dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
+
+ /* Overrun is special, not associated with a char. */
+ if (status & BELKIN_SA_LSR_OE)
+ tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
+ }
+
+ tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
+ urb->actual_length);
+ tty_flip_buffer_push(&port->port);
+}
+
static void belkin_sa_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
{
@@ -358,7 +292,7 @@ static void belkin_sa_set_termios(struct tty_struct *tty,
unsigned long control_state;
int bad_flow_control;
speed_t baud;
- struct ktermios *termios = tty->termios;
+ struct ktermios *termios = &tty->termios;
iflag = termios->c_iflag;
cflag = termios->c_cflag;
@@ -441,7 +375,9 @@ static void belkin_sa_set_termios(struct tty_struct *tty,
case CS8:
urb_value = BELKIN_SA_DATA_BITS(8);
break;
- default: dbg("CSIZE was not CS5-CS8, using default of 8");
+ default:
+ dev_dbg(&port->dev,
+ "CSIZE was not CS5-CS8, using default of 8\n");
urb_value = BELKIN_SA_DATA_BITS(8);
break;
}
@@ -483,8 +419,7 @@ static void belkin_sa_set_termios(struct tty_struct *tty,
spin_lock_irqsave(&priv->lock, flags);
priv->control_state = control_state;
spin_unlock_irqrestore(&priv->lock, flags);
-} /* belkin_sa_set_termios */
-
+}
static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state)
{
@@ -495,16 +430,13 @@ static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state)
dev_err(&port->dev, "Set break_ctl %d\n", break_state);
}
-
-static int belkin_sa_tiocmget(struct tty_struct *tty, struct file *file)
+static int belkin_sa_tiocmget(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct belkin_sa_private *priv = usb_get_serial_port_data(port);
unsigned long control_state;
unsigned long flags;
- dbg("%s", __func__);
-
spin_lock_irqsave(&priv->lock, flags);
control_state = priv->control_state;
spin_unlock_irqrestore(&priv->lock, flags);
@@ -512,8 +444,7 @@ static int belkin_sa_tiocmget(struct tty_struct *tty, struct file *file)
return control_state;
}
-
-static int belkin_sa_tiocmset(struct tty_struct *tty, struct file *file,
+static int belkin_sa_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
struct usb_serial_port *port = tty->driver_data;
@@ -525,8 +456,6 @@ static int belkin_sa_tiocmset(struct tty_struct *tty, struct file *file,
int rts = 0;
int dtr = 0;
- dbg("%s", __func__);
-
spin_lock_irqsave(&priv->lock, flags);
control_state = priv->control_state;
@@ -565,40 +494,8 @@ exit:
return retval;
}
-
-static int __init belkin_sa_init(void)
-{
- int retval;
- retval = usb_serial_register(&belkin_device);
- if (retval)
- goto failed_usb_serial_register;
- retval = usb_register(&belkin_driver);
- if (retval)
- goto failed_usb_register;
- printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
- DRIVER_DESC "\n");
- return 0;
-failed_usb_register:
- usb_serial_deregister(&belkin_device);
-failed_usb_serial_register:
- return retval;
-}
-
-
-static void __exit belkin_sa_exit (void)
-{
- usb_deregister(&belkin_driver);
- usb_serial_deregister(&belkin_device);
-}
-
-
-module_init(belkin_sa_init);
-module_exit(belkin_sa_exit);
+module_usb_serial_driver(serial_drivers, id_table);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");
-
-module_param(debug, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Debug enabled or not");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 05:15:03 +0000