text: /*
   * Qualcomm Serial USB driver
   *
   *	Copyright (c) 2008 QUALCOMM Incorporated.
   *	Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
   *	Copyright (c) 2009 Novell Inc.
   *
   *	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.
   *
   */
  
  #include <linux/tty.h>
  #include <linux/tty_flip.h>
  #include <linux/usb.h>
  #include <linux/usb/serial.h>
  #include <linux/slab.h>
  #include "usb-wwan.h"
  
  #define DRIVER_AUTHOR "Qualcomm Inc"
  #define DRIVER_DESC "Qualcomm USB Serial driver"
  
  static int debug;
  
  static const struct usb_device_id id_table[] = {
  	{USB_DEVICE(0x05c6, 0x9211)},	/* Acer Gobi QDL device */
  	{USB_DEVICE(0x05c6, 0x9212)},	/* Acer Gobi Modem Device */
  	{USB_DEVICE(0x03f0, 0x1f1d)},	/* HP un2400 Gobi Modem Device */
  	{USB_DEVICE(0x03f0, 0x201d)},	/* HP un2400 Gobi QDL Device */
  	{USB_DEVICE(0x04da, 0x250d)},	/* Panasonic Gobi Modem device */
  	{USB_DEVICE(0x04da, 0x250c)},	/* Panasonic Gobi QDL device */
  	{USB_DEVICE(0x413c, 0x8172)},	/* Dell Gobi Modem device */
  	{USB_DEVICE(0x413c, 0x8171)},	/* Dell Gobi QDL device */
  	{USB_DEVICE(0x1410, 0xa001)},	/* Novatel Gobi Modem device */
  	{USB_DEVICE(0x1410, 0xa008)},	/* Novatel Gobi QDL device */
  	{USB_DEVICE(0x0b05, 0x1776)},	/* Asus Gobi Modem device */
  	{USB_DEVICE(0x0b05, 0x1774)},	/* Asus Gobi QDL device */
  	{USB_DEVICE(0x19d2, 0xfff3)},	/* ONDA Gobi Modem device */
  	{USB_DEVICE(0x19d2, 0xfff2)},	/* ONDA Gobi QDL device */
  	{USB_DEVICE(0x1557, 0x0a80)},	/* OQO Gobi QDL device */
  	{USB_DEVICE(0x05c6, 0x9001)},   /* Generic Gobi Modem device */
  	{USB_DEVICE(0x05c6, 0x9002)},	/* Generic Gobi Modem device */
  	{USB_DEVICE(0x05c6, 0x9202)},	/* Generic Gobi Modem device */
  	{USB_DEVICE(0x05c6, 0x9203)},	/* Generic Gobi Modem device */
  	{USB_DEVICE(0x05c6, 0x9222)},	/* Generic Gobi Modem device */
  	{USB_DEVICE(0x05c6, 0x9008)},	/* Generic Gobi QDL device */
  	{USB_DEVICE(0x05c6, 0x9201)},	/* Generic Gobi QDL device */
  	{USB_DEVICE(0x05c6, 0x9221)},	/* Generic Gobi QDL device */
  	{USB_DEVICE(0x05c6, 0x9231)},	/* Generic Gobi QDL device */
  	{USB_DEVICE(0x1f45, 0x0001)},	/* Unknown Gobi QDL device */
  	{USB_DEVICE(0x413c, 0x8185)},	/* Dell Gobi 2000 QDL device (N0218, VU936) */
  	{USB_DEVICE(0x413c, 0x8186)},	/* Dell Gobi 2000 Modem device (N0218, VU936) */
  	{USB_DEVICE(0x05c6, 0x9208)},	/* Generic Gobi 2000 QDL device */
  	{USB_DEVICE(0x05c6, 0x920b)},	/* Generic Gobi 2000 Modem device */
  	{USB_DEVICE(0x05c6, 0x9224)},	/* Sony Gobi 2000 QDL device (N0279, VU730) */
  	{USB_DEVICE(0x05c6, 0x9225)},	/* Sony Gobi 2000 Modem device (N0279, VU730) */
  	{USB_DEVICE(0x05c6, 0x9244)},	/* Samsung Gobi 2000 QDL device (VL176) */
  	{USB_DEVICE(0x05c6, 0x9245)},	/* Samsung Gobi 2000 Modem device (VL176) */
  	{USB_DEVICE(0x03f0, 0x241d)},	/* HP Gobi 2000 QDL device (VP412) */
  	{USB_DEVICE(0x03f0, 0x251d)},	/* HP Gobi 2000 Modem device (VP412) */
  	{USB_DEVICE(0x05c6, 0x9214)},	/* Acer Gobi 2000 QDL device (VP413) */
  	{USB_DEVICE(0x05c6, 0x9215)},	/* Acer Gobi 2000 Modem device (VP413) */
  	{USB_DEVICE(0x05c6, 0x9264)},	/* Asus Gobi 2000 QDL device (VR305) */
  	{USB_DEVICE(0x05c6, 0x9265)},	/* Asus Gobi 2000 Modem device (VR305) */
  	{USB_DEVICE(0x05c6, 0x9234)},	/* Top Global Gobi 2000 QDL device (VR306) */
  	{USB_DEVICE(0x05c6, 0x9235)},	/* Top Global Gobi 2000 Modem device (VR306) */
  	{USB_DEVICE(0x05c6, 0x9274)},	/* iRex Technologies Gobi 2000 QDL device (VR307) */
  	{USB_DEVICE(0x05c6, 0x9275)},	/* iRex Technologies Gobi 2000 Modem device (VR307) */
  	{USB_DEVICE(0x1199, 0x9000)},	/* Sierra Wireless Gobi 2000 QDL device (VT773) */
  	{USB_DEVICE(0x1199, 0x9001)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9002)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9003)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9004)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9005)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9006)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9007)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9008)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x9009)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x1199, 0x900a)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
  	{USB_DEVICE(0x16d8, 0x8001)},	/* CMDTech Gobi 2000 QDL device (VU922) */
  	{USB_DEVICE(0x16d8, 0x8002)},	/* CMDTech Gobi 2000 Modem device (VU922) */
  	{USB_DEVICE(0x05c6, 0x9204)},	/* Gobi 2000 QDL device */
  	{USB_DEVICE(0x05c6, 0x9205)},	/* Gobi 2000 Modem device */
  	{ }				/* Terminating entry */
  };
  MODULE_DEVICE_TABLE(usb, id_table);
  
  static struct usb_driver qcdriver = {
  	.name			= "qcserial",
  	.probe			= usb_serial_probe,
  	.disconnect		= usb_serial_disconnect,
  	.id_table		= id_table,
  	.suspend		= usb_serial_suspend,
  	.resume			= usb_serial_resume,
  	.supports_autosuspend	= true,
  };
  
  static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
  {
  	struct usb_wwan_intf_private *data;
  	struct usb_host_interface *intf = serial->interface->cur_altsetting;
  	int retval = -ENODEV;
  	__u8 nintf;
  	__u8 ifnum;
  
  	dbg("%s", __func__);
  
  	nintf = serial->dev->actconfig->desc.bNumInterfaces;
  	dbg("Num Interfaces = %d", nintf);
  	ifnum = intf->desc.bInterfaceNumber;
  	dbg("This Interface = %d", ifnum);
  
  	data = serial->private = kzalloc(sizeof(struct usb_wwan_intf_private),
  					 GFP_KERNEL);
  	if (!data)
  		return -ENOMEM;
  
  	spin_lock_init(&data->susp_lock);
  
  	switch (nintf) {
  	case 1:
  		/* QDL mode */
  		/* Gobi 2000 has a single altsetting, older ones have two */
  		if (serial->interface->num_altsetting == 2)
  			intf = &serial->interface->altsetting[1];
  		else if (serial->interface->num_altsetting > 2)
  			break;
  
  		if (intf->desc.bNumEndpoints == 2 &&
  		    usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
  		    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
  			dbg("QDL port found");
  
  			if (serial->interface->num_altsetting == 1)
  				return 0;
  
  			retval = usb_set_interface(serial->dev, ifnum, 1);
  			if (retval < 0) {
  				dev_err(&serial->dev->dev,
  					"Could not set interface, error %d\n",
  					retval);
  				retval = -ENODEV;
  				kfree(data);
  			}
  			return retval;
  		}
  		break;
  
  	case 3:
  	case 4:
  		/* Composite mode */
  		if (ifnum == 2) {
  			dbg("Modem port found");
  			retval = usb_set_interface(serial->dev, ifnum, 0);
  			if (retval < 0) {
  				dev_err(&serial->dev->dev,
  					"Could not set interface, error %d\n",
  					retval);
  				retval = -ENODEV;
  				kfree(data);
  			}
  			return retval;
  		}
  		break;
  
  	default:
  		dev_err(&serial->dev->dev,
  			"unknown number of interfaces: %d\n", nintf);
  		kfree(data);
  		return -ENODEV;
  	}
  
  	return retval;
  }
  
  static struct usb_serial_driver qcdevice = {
  	.driver = {
  		.owner     = THIS_MODULE,
  		.name      = "qcserial",
  	},
  	.description         = "Qualcomm USB modem",
  	.id_table            = id_table,
  	.usb_driver          = &qcdriver,
  	.num_ports           = 1,
  	.probe               = qcprobe,
  	.open		     = usb_wwan_open,
  	.close		     = usb_wwan_close,
  	.write		     = usb_wwan_write,
  	.write_room	     = usb_wwan_write_room,
  	.chars_in_buffer     = usb_wwan_chars_in_buffer,
  	.attach		     = usb_wwan_startup,
  	.disconnect	     = usb_wwan_disconnect,
  	.release	     = usb_wwan_release,
  #ifdef CONFIG_PM
  	.suspend	     = usb_wwan_suspend,
  	.resume		     = usb_wwan_resume,
  #endif
  };
  
  static int __init qcinit(void)
  {
  	int retval;
  
  	retval = usb_serial_register(&qcdevice);
  	if (retval)
  		return retval;
  
  	retval = usb_register(&qcdriver);
  	if (retval) {
  		usb_serial_deregister(&qcdevice);
  		return retval;
  	}
  
  	return 0;
  }
  
  static void __exit qcexit(void)
  {
  	usb_deregister(&qcdriver);
  	usb_serial_deregister(&qcdevice);
  }
  
  module_init(qcinit);
  module_exit(qcexit);
  
  MODULE_AUTHOR(DRIVER_AUTHOR);
  MODULE_DESCRIPTION(DRIVER_DESC);
  MODULE_LICENSE("GPL v2");
  
  module_param(debug, bool, S_IRUGO | S_IWUSR);
  MODULE_PARM_DESC(debug, "Debug enabled or not");
  