USB: ipw: convert to usb-wwan framework

From 2d487c10136f76cf3705881d34868e8592839cfe Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oliver@neukum.org>
Date: Tue, 12 Jul 2011 15:36:51 +0200
Subject: [PATCH] USB: ipw: convert to usb-wwan framework

This patch allows the ipw driver to use the multibuffer
infrastructure of usb-wwan. This improves speed.

Signed-off-by: Oliver Neukum<oneukum@suse.de>
Tested-by: Michal Hybner <dta081@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/ipw.c

@@ -47,6 +47,7 @@
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
 #include <linux/uaccess.h>
+#include "usb-wwan.h"
 
 /*
  * Version Information
@@ -185,7 +186,7 @@ static int ipw_open(struct tty_struct *tty, struct usb_serial_port *port)
 
 	/*--2: Start reading from the device */
 	dbg("%s: setting up bulk read callback", __func__);
-	usb_serial_generic_open(tty, port);
+	usb_wwan_open(tty, port);
 
 	/*--3: Tell the modem to open the floodgates on the rx bulk channel */
 	dbg("%s:asking modem for RxRead (RXBULK_ON)", __func__);
@@ -219,6 +220,29 @@ static int ipw_open(struct tty_struct *tty, struct usb_serial_port *port)
 	return 0;
 }
 
+/* fake probe - only to allocate data structures */
+static int ipw_probe(struct usb_serial *serial, const struct usb_device_id *id)
+{
+	struct usb_wwan_intf_private *data;
+
+	data = kzalloc(sizeof(struct usb_wwan_intf_private), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	spin_lock_init(&data->susp_lock);
+	usb_set_serial_data(serial, data);
+	return 0;
+}
+
+static void ipw_release(struct usb_serial *serial)
+{
+	struct usb_wwan_intf_private *data = usb_get_serial_data(serial);
+
+	usb_wwan_release(serial);
+	usb_set_serial_data(serial, NULL);
+	kfree(data);
+}
+
 static void ipw_dtr_rts(struct usb_serial_port *port, int on)
 {
 	struct usb_device *dev = port->serial->dev;
@@ -285,7 +309,7 @@ static void ipw_close(struct usb_serial_port *port)
 		dev_err(&port->dev,
 			"Disabling bulk RxRead failed (error = %d)\n", result);
 
-	usb_serial_generic_close(port);
+	usb_wwan_close(port);
 }
 
 static struct usb_serial_driver ipw_device = {
@@ -297,9 +321,14 @@ static struct usb_serial_driver ipw_device = {
 	.usb_driver =		&usb_ipw_driver,
 	.id_table =		usb_ipw_ids,
 	.num_ports =		1,
+	.disconnect =		usb_wwan_disconnect,
 	.open =			ipw_open,
 	.close =		ipw_close,
+	.probe =		ipw_probe,
+	.attach =		usb_wwan_startup,
+	.release =		ipw_release,
 	.dtr_rts =		ipw_dtr_rts,
+	.write =		usb_wwan_write,
 };