1 // SPDX-License-Identifier: GPL-2.0+
3  * IPWireless 3G UMTS TDD Modem driver (USB connected)
6  *   Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
12  * It was written out of frustration with the IPWireless USB modem
19  * The modem adheres to the "3GPP TS  27.007 AT command set for 3G
21  * http://www.3gpp.org/ftp/Specs/html-info/27007.htm
29  * There is still some work to be done in terms of handling
32  * code found in usb/serial and usb/class
42 #include <linux/usb.h>
43 #include <linux/usb/serial.h>
45 #include "usb-wwan.h"
87 					/* I mean, is there a point to any other setting these days? :) */
89 /* usb control request types : */
94 #define IPW_SIO_POLL		0x08	/* get serial port status byte, call with value=0 */
130 MODULE_DEVICE_TABLE(usb, id_table);
134 	struct usb_device *udev = port->serial->dev;  in ipw_open()
135 	struct device *dev = &port->dev;  in ipw_open()
142 		return -ENOMEM;  in ipw_open()
144 	/* --1: Tell the modem to initialize (we think) From sniffs this is  in ipw_open()
145 	 *	always the first thing that gets sent to the modem during  in ipw_open()
160 	usb_clear_halt(udev, usb_rcvbulkpipe(udev, port->bulk_in_endpointAddress));  in ipw_open()
161 	usb_clear_halt(udev, usb_sndbulkpipe(udev, port->bulk_out_endpointAddress));  in ipw_open()
163 	/*--2: Start reading from the device */  in ipw_open()
167 	/*--3: Tell the modem to open the floodgates on the rx bulk channel */  in ipw_open()
180 	/*--4: setup the initial flowcontrol */  in ipw_open()
197 static int ipw_attach(struct usb_serial *serial)  in ipw_attach()  argument
203 		return -ENOMEM;  in ipw_attach()
205 	spin_lock_init(&data->susp_lock);  in ipw_attach()
206 	usb_set_serial_data(serial, data);  in ipw_attach()
210 static void ipw_release(struct usb_serial *serial)  in ipw_release()  argument
212 	struct usb_wwan_intf_private *data = usb_get_serial_data(serial);  in ipw_release()
214 	usb_set_serial_data(serial, NULL);  in ipw_release()
220 	struct usb_device *udev = port->serial->dev;  in ipw_dtr_rts()
221 	struct device *dev = &port->dev;  in ipw_dtr_rts()
251 	struct usb_device *udev = port->serial->dev;  in ipw_close()
252 	struct device *dev = &port->dev;  in ipw_close()
255 	/*--3: purge */  in ipw_close()
269 	/* send RXBULK_off (tell modem to stop transmitting bulk data on  in ipw_close()