* Copyright (C) 1999 - 2004
* Greg Kroah-Hartman (greg@kroah.com)
*
- * 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
*
#include <linux/spinlock.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
-#include "usb-serial.h"
+#include <linux/usb/serial.h>
#include "visor.h"
/*
static int visor_calc_num_ports(struct usb_serial *serial);
static void visor_shutdown (struct usb_serial *serial);
static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
-static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios);
-static void visor_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
-static void visor_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
-static void visor_read_int_callback (struct urb *urb, struct pt_regs *regs);
+static void visor_set_termios (struct usb_serial_port *port, struct ktermios *old_termios);
+static void visor_write_bulk_callback (struct urb *urb);
+static void visor_read_bulk_callback (struct urb *urb);
+static void visor_read_int_callback (struct urb *urb);
static int clie_3_5_startup (struct usb_serial *serial);
static int treo_attach (struct usb_serial *serial);
static int clie_5_attach (struct usb_serial *serial);
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
- { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID),
- .driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
- { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
.name = "visor",
},
.description = "Handspring Visor / Palm OS",
+ .usb_driver = &visor_driver,
.id_table = id_table,
.num_interrupt_in = NUM_DONT_CARE,
.num_bulk_in = 2,
.name = "clie_5",
},
.description = "Sony Clie 5.0",
+ .usb_driver = &visor_driver,
.id_table = clie_id_5_table,
.num_interrupt_in = NUM_DONT_CARE,
.num_bulk_in = 2,
.name = "clie_3.5",
},
.description = "Sony Clie 3.5",
+ .usb_driver = &visor_driver,
.id_table = clie_id_3_5_table,
.num_interrupt_in = 0,
.num_bulk_in = 1,
int bytes_in;
int bytes_out;
int outstanding_urbs;
- int throttled;
+ unsigned char throttled;
+ unsigned char actually_throttled;
};
/* number of outstanding urbs to prevent userspace DoS from happening */
spin_lock_irqsave(&priv->lock, flags);
priv->bytes_in = 0;
priv->bytes_out = 0;
- priv->outstanding_urbs = 0;
priv->throttled = 0;
spin_unlock_irqrestore(&priv->lock, flags);
/* shutdown our urbs */
usb_kill_urb(port->read_urb);
- if (port->interrupt_in_urb)
- usb_kill_urb(port->interrupt_in_urb);
+ usb_kill_urb(port->interrupt_in_urb);
/* Try to send shutdown message, if the device is gone, this will just fail. */
transfer_buffer = kmalloc (0x12, GFP_KERNEL);
dbg("%s - write limit hit\n", __FUNCTION__);
return 0;
}
+ priv->outstanding_urbs++;
spin_unlock_irqrestore(&priv->lock, flags);
buffer = kmalloc (count, GFP_ATOMIC);
if (!buffer) {
dev_err(&port->dev, "out of memory\n");
- return -ENOMEM;
+ count = -ENOMEM;
+ goto error_no_buffer;
}
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
dev_err(&port->dev, "no more free urbs\n");
- kfree (buffer);
- return -ENOMEM;
+ count = -ENOMEM;
+ goto error_no_urb;
}
memcpy (buffer, buf, count);
dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed with status = %d\n",
__FUNCTION__, status);
count = status;
- kfree (buffer);
+ goto error;
} else {
spin_lock_irqsave(&priv->lock, flags);
- ++priv->outstanding_urbs;
priv->bytes_out += count;
spin_unlock_irqrestore(&priv->lock, flags);
}
/* we are done with this urb, so let the host driver
* really free it when it is finished with it */
- usb_free_urb (urb);
+ usb_free_urb(urb);
+ return count;
+error:
+ usb_free_urb(urb);
+error_no_urb:
+ kfree(buffer);
+error_no_buffer:
+ spin_lock_irqsave(&priv->lock, flags);
+ --priv->outstanding_urbs;
+ spin_unlock_irqrestore(&priv->lock, flags);
return count;
}
static int visor_write_room (struct usb_serial_port *port)
{
+ struct visor_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+
dbg("%s - port %d", __FUNCTION__, port->number);
/*
* We really can take anything the user throws at us
* but let's pick a nice big number to tell the tty
- * layer that we have lots of free space
+ * layer that we have lots of free space, unless we don't.
*/
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ dbg("%s - write limit hit\n", __FUNCTION__);
+ return 0;
+ }
+ spin_unlock_irqrestore(&priv->lock, flags);
+
return 2048;
}
}
-static void visor_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
+static void visor_write_bulk_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct visor_private *priv = usb_get_serial_port_data(port);
}
-static void visor_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
+static void visor_read_bulk_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned char *data = urb->transfer_buffer;
struct tty_struct *tty;
- unsigned long flags;
- int throttled;
int result;
+ int available_room;
dbg("%s - port %d", __FUNCTION__, port->number);
tty = port->tty;
if (tty && urb->actual_length) {
- tty_buffer_request_room(tty, urb->actual_length);
- tty_insert_flip_string(tty, data, urb->actual_length);
- tty_flip_buffer_push(tty);
+ available_room = tty_buffer_request_room(tty, urb->actual_length);
+ if (available_room) {
+ tty_insert_flip_string(tty, data, available_room);
+ tty_flip_buffer_push(tty);
+ }
+ spin_lock(&priv->lock);
+ priv->bytes_in += available_room;
+
+ } else {
+ spin_lock(&priv->lock);
}
- spin_lock_irqsave(&priv->lock, flags);
- priv->bytes_in += urb->actual_length;
- throttled = priv->throttled;
- spin_unlock_irqrestore(&priv->lock, flags);
/* Continue trying to always read if we should */
- if (!throttled) {
+ if (!priv->throttled) {
usb_fill_bulk_urb (port->read_urb, port->serial->dev,
usb_rcvbulkpipe(port->serial->dev,
port->bulk_in_endpointAddress),
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
if (result)
dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
+ } else {
+ priv->actually_throttled = 1;
}
- return;
+ spin_unlock(&priv->lock);
}
-static void visor_read_int_callback (struct urb *urb, struct pt_regs *regs)
+static void visor_read_int_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
int result;
dbg("%s - port %d", __FUNCTION__, port->number);
spin_lock_irqsave(&priv->lock, flags);
priv->throttled = 0;
+ priv->actually_throttled = 0;
spin_unlock_irqrestore(&priv->lock, flags);
port->read_urb->dev = port->serial->dev;
static int generic_startup(struct usb_serial *serial)
{
+ struct usb_serial_port **ports = serial->port;
struct visor_private *priv;
int i;
for (i = 0; i < serial->num_ports; ++i) {
priv = kzalloc (sizeof(*priv), GFP_KERNEL);
- if (!priv)
+ if (!priv) {
+ while (i-- != 0) {
+ priv = usb_get_serial_port_data(ports[i]);
+ usb_set_serial_port_data(ports[i], NULL);
+ kfree(priv);
+ }
return -ENOMEM;
+ }
spin_lock_init(&priv->lock);
- usb_set_serial_port_data(serial->port[i], priv);
+ usb_set_serial_port_data(ports[i], priv);
}
return 0;
}
static void visor_shutdown (struct usb_serial *serial)
{
+ struct visor_private *priv;
+ int i;
+
dbg("%s", __FUNCTION__);
+
+ for (i = 0; i < serial->num_ports; i++) {
+ priv = usb_get_serial_port_data(serial->port[i]);
+ if (priv) {
+ usb_set_serial_port_data(serial->port[i], NULL);
+ kfree(priv);
+ }
+ }
}
static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
/* This function is all nice and good, but we don't change anything based on it :) */
-static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios)
+static void visor_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
{
unsigned int cflag;
projects / linux-2.6-omap-h63xx.git / blobdiff