xref: /openbmc/linux/drivers/usb/serial/qcserial.c (revision 93696d8f)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Qualcomm Serial USB driver
4  *
5  *	Copyright (c) 2008 QUALCOMM Incorporated.
6  *	Copyright (c) 2009 Greg Kroah-Hartman <gregkh@suse.de>
7  *	Copyright (c) 2009 Novell Inc.
8  */
9 
10 #include <linux/tty.h>
11 #include <linux/tty_flip.h>
12 #include <linux/module.h>
13 #include <linux/usb.h>
14 #include <linux/usb/serial.h>
15 #include <linux/slab.h>
16 #include "usb-wwan.h"
17 
18 #define DRIVER_AUTHOR "Qualcomm Inc"
19 #define DRIVER_DESC "Qualcomm USB Serial driver"
20 
21 #define QUECTEL_EC20_PID	0x9215
22 
23 /* standard device layouts supported by this driver */
24 enum qcserial_layouts {
25 	QCSERIAL_G2K = 0,	/* Gobi 2000 */
26 	QCSERIAL_G1K = 1,	/* Gobi 1000 */
27 	QCSERIAL_SWI = 2,	/* Sierra Wireless */
28 	QCSERIAL_HWI = 3,	/* Huawei */
29 };
30 
31 #define DEVICE_G1K(v, p) \
32 	USB_DEVICE(v, p), .driver_info = QCSERIAL_G1K
33 #define DEVICE_SWI(v, p) \
34 	USB_DEVICE(v, p), .driver_info = QCSERIAL_SWI
35 #define DEVICE_HWI(v, p) \
36 	USB_DEVICE(v, p), .driver_info = QCSERIAL_HWI
37 
38 static const struct usb_device_id id_table[] = {
39 	/* Gobi 1000 devices */
40 	{DEVICE_G1K(0x05c6, 0x9211)},	/* Acer Gobi QDL device */
41 	{DEVICE_G1K(0x05c6, 0x9212)},	/* Acer Gobi Modem Device */
42 	{DEVICE_G1K(0x03f0, 0x1f1d)},	/* HP un2400 Gobi Modem Device */
43 	{DEVICE_G1K(0x03f0, 0x201d)},	/* HP un2400 Gobi QDL Device */
44 	{DEVICE_G1K(0x04da, 0x250d)},	/* Panasonic Gobi Modem device */
45 	{DEVICE_G1K(0x04da, 0x250c)},	/* Panasonic Gobi QDL device */
46 	{DEVICE_G1K(0x413c, 0x8172)},	/* Dell Gobi Modem device */
47 	{DEVICE_G1K(0x413c, 0x8171)},	/* Dell Gobi QDL device */
48 	{DEVICE_G1K(0x1410, 0xa001)},	/* Novatel/Verizon USB-1000 */
49 	{DEVICE_G1K(0x1410, 0xa002)},	/* Novatel Gobi Modem device */
50 	{DEVICE_G1K(0x1410, 0xa003)},	/* Novatel Gobi Modem device */
51 	{DEVICE_G1K(0x1410, 0xa004)},	/* Novatel Gobi Modem device */
52 	{DEVICE_G1K(0x1410, 0xa005)},	/* Novatel Gobi Modem device */
53 	{DEVICE_G1K(0x1410, 0xa006)},	/* Novatel Gobi Modem device */
54 	{DEVICE_G1K(0x1410, 0xa007)},	/* Novatel Gobi Modem device */
55 	{DEVICE_G1K(0x1410, 0xa008)},	/* Novatel Gobi QDL device */
56 	{DEVICE_G1K(0x0b05, 0x1776)},	/* Asus Gobi Modem device */
57 	{DEVICE_G1K(0x0b05, 0x1774)},	/* Asus Gobi QDL device */
58 	{DEVICE_G1K(0x19d2, 0xfff3)},	/* ONDA Gobi Modem device */
59 	{DEVICE_G1K(0x19d2, 0xfff2)},	/* ONDA Gobi QDL device */
60 	{DEVICE_G1K(0x1557, 0x0a80)},	/* OQO Gobi QDL device */
61 	{DEVICE_G1K(0x05c6, 0x9001)},   /* Generic Gobi Modem device */
62 	{DEVICE_G1K(0x05c6, 0x9002)},	/* Generic Gobi Modem device */
63 	{DEVICE_G1K(0x05c6, 0x9202)},	/* Generic Gobi Modem device */
64 	{DEVICE_G1K(0x05c6, 0x9203)},	/* Generic Gobi Modem device */
65 	{DEVICE_G1K(0x05c6, 0x9222)},	/* Generic Gobi Modem device */
66 	{DEVICE_G1K(0x05c6, 0x9008)},	/* Generic Gobi QDL device */
67 	{DEVICE_G1K(0x05c6, 0x9009)},	/* Generic Gobi Modem device */
68 	{DEVICE_G1K(0x05c6, 0x9201)},	/* Generic Gobi QDL device */
69 	{DEVICE_G1K(0x05c6, 0x9221)},	/* Generic Gobi QDL device */
70 	{DEVICE_G1K(0x05c6, 0x9231)},	/* Generic Gobi QDL device */
71 	{DEVICE_G1K(0x1f45, 0x0001)},	/* Unknown Gobi QDL device */
72 	{DEVICE_G1K(0x1bc7, 0x900e)},	/* Telit Gobi QDL device */
73 
74 	/* Gobi 2000 devices */
75 	{USB_DEVICE(0x1410, 0xa010)},	/* Novatel Gobi 2000 QDL device */
76 	{USB_DEVICE(0x1410, 0xa011)},	/* Novatel Gobi 2000 QDL device */
77 	{USB_DEVICE(0x1410, 0xa012)},	/* Novatel Gobi 2000 QDL device */
78 	{USB_DEVICE(0x1410, 0xa013)},	/* Novatel Gobi 2000 QDL device */
79 	{USB_DEVICE(0x1410, 0xa014)},	/* Novatel Gobi 2000 QDL device */
80 	{USB_DEVICE(0x413c, 0x8185)},	/* Dell Gobi 2000 QDL device (N0218, VU936) */
81 	{USB_DEVICE(0x413c, 0x8186)},	/* Dell Gobi 2000 Modem device (N0218, VU936) */
82 	{USB_DEVICE(0x05c6, 0x9208)},	/* Generic Gobi 2000 QDL device */
83 	{USB_DEVICE(0x05c6, 0x920b)},	/* Generic Gobi 2000 Modem device */
84 	{USB_DEVICE(0x05c6, 0x9224)},	/* Sony Gobi 2000 QDL device (N0279, VU730) */
85 	{USB_DEVICE(0x05c6, 0x9225)},	/* Sony Gobi 2000 Modem device (N0279, VU730) */
86 	{USB_DEVICE(0x05c6, 0x9244)},	/* Samsung Gobi 2000 QDL device (VL176) */
87 	{USB_DEVICE(0x05c6, 0x9245)},	/* Samsung Gobi 2000 Modem device (VL176) */
88 	{USB_DEVICE(0x03f0, 0x241d)},	/* HP Gobi 2000 QDL device (VP412) */
89 	{USB_DEVICE(0x03f0, 0x251d)},	/* HP Gobi 2000 Modem device (VP412) */
90 	{USB_DEVICE(0x05c6, 0x9214)},	/* Acer Gobi 2000 QDL device (VP413) */
91 	{USB_DEVICE(0x05c6, 0x9215)},	/* Acer Gobi 2000 Modem device (VP413) */
92 	{USB_DEVICE(0x05c6, 0x9264)},	/* Asus Gobi 2000 QDL device (VR305) */
93 	{USB_DEVICE(0x05c6, 0x9265)},	/* Asus Gobi 2000 Modem device (VR305) */
94 	{USB_DEVICE(0x05c6, 0x9234)},	/* Top Global Gobi 2000 QDL device (VR306) */
95 	{USB_DEVICE(0x05c6, 0x9235)},	/* Top Global Gobi 2000 Modem device (VR306) */
96 	{USB_DEVICE(0x05c6, 0x9274)},	/* iRex Technologies Gobi 2000 QDL device (VR307) */
97 	{USB_DEVICE(0x05c6, 0x9275)},	/* iRex Technologies Gobi 2000 Modem device (VR307) */
98 	{USB_DEVICE(0x1199, 0x9000)},	/* Sierra Wireless Gobi 2000 QDL device (VT773) */
99 	{USB_DEVICE(0x1199, 0x9001)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
100 	{USB_DEVICE(0x1199, 0x9002)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
101 	{USB_DEVICE(0x1199, 0x9003)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
102 	{USB_DEVICE(0x1199, 0x9004)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
103 	{USB_DEVICE(0x1199, 0x9005)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
104 	{USB_DEVICE(0x1199, 0x9006)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
105 	{USB_DEVICE(0x1199, 0x9007)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
106 	{USB_DEVICE(0x1199, 0x9008)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
107 	{USB_DEVICE(0x1199, 0x9009)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
108 	{USB_DEVICE(0x1199, 0x900a)},	/* Sierra Wireless Gobi 2000 Modem device (VT773) */
109 	{USB_DEVICE(0x1199, 0x9011)},   /* Sierra Wireless Gobi 2000 Modem device (MC8305) */
110 	{USB_DEVICE(0x16d8, 0x8001)},	/* CMDTech Gobi 2000 QDL device (VU922) */
111 	{USB_DEVICE(0x16d8, 0x8002)},	/* CMDTech Gobi 2000 Modem device (VU922) */
112 	{USB_DEVICE(0x05c6, 0x9204)},	/* Gobi 2000 QDL device */
113 	{USB_DEVICE(0x05c6, 0x9205)},	/* Gobi 2000 Modem device */
114 
115 	/* Gobi 3000 devices */
116 	{USB_DEVICE(0x03f0, 0x371d)},	/* HP un2430 Gobi 3000 QDL */
117 	{USB_DEVICE(0x05c6, 0x920c)},	/* Gobi 3000 QDL */
118 	{USB_DEVICE(0x05c6, 0x920d)},	/* Gobi 3000 Composite */
119 	{USB_DEVICE(0x1410, 0xa020)},   /* Novatel Gobi 3000 QDL */
120 	{USB_DEVICE(0x1410, 0xa021)},	/* Novatel Gobi 3000 Composite */
121 	{USB_DEVICE(0x413c, 0x8193)},	/* Dell Gobi 3000 QDL */
122 	{USB_DEVICE(0x413c, 0x8194)},	/* Dell Gobi 3000 Composite */
123 	{USB_DEVICE(0x413c, 0x81a6)},	/* Dell DW5570 QDL (MC8805) */
124 	{USB_DEVICE(0x1199, 0x68a4)},	/* Sierra Wireless QDL */
125 	{USB_DEVICE(0x1199, 0x68a5)},	/* Sierra Wireless Modem */
126 	{USB_DEVICE(0x1199, 0x68a8)},	/* Sierra Wireless QDL */
127 	{USB_DEVICE(0x1199, 0x68a9)},	/* Sierra Wireless Modem */
128 	{USB_DEVICE(0x1199, 0x9010)},	/* Sierra Wireless Gobi 3000 QDL */
129 	{USB_DEVICE(0x1199, 0x9012)},	/* Sierra Wireless Gobi 3000 QDL */
130 	{USB_DEVICE(0x1199, 0x9013)},	/* Sierra Wireless Gobi 3000 Modem device (MC8355) */
131 	{USB_DEVICE(0x1199, 0x9014)},	/* Sierra Wireless Gobi 3000 QDL */
132 	{USB_DEVICE(0x1199, 0x9015)},	/* Sierra Wireless Gobi 3000 Modem device */
133 	{USB_DEVICE(0x1199, 0x9018)},	/* Sierra Wireless Gobi 3000 QDL */
134 	{USB_DEVICE(0x1199, 0x9019)},	/* Sierra Wireless Gobi 3000 Modem device */
135 	{USB_DEVICE(0x1199, 0x901b)},	/* Sierra Wireless MC7770 */
136 	{USB_DEVICE(0x12D1, 0x14F0)},	/* Sony Gobi 3000 QDL */
137 	{USB_DEVICE(0x12D1, 0x14F1)},	/* Sony Gobi 3000 Composite */
138 	{USB_DEVICE(0x0AF0, 0x8120)},	/* Option GTM681W */
139 
140 	/* non-Gobi Sierra Wireless devices */
141 	{DEVICE_SWI(0x03f0, 0x4e1d)},	/* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
142 	{DEVICE_SWI(0x0f3d, 0x68a2)},	/* Sierra Wireless MC7700 */
143 	{DEVICE_SWI(0x114f, 0x68a2)},	/* Sierra Wireless MC7750 */
144 	{DEVICE_SWI(0x1199, 0x68a2)},	/* Sierra Wireless MC7710 */
145 	{DEVICE_SWI(0x1199, 0x68c0)},	/* Sierra Wireless MC7304/MC7354 */
146 	{DEVICE_SWI(0x1199, 0x901c)},	/* Sierra Wireless EM7700 */
147 	{DEVICE_SWI(0x1199, 0x901e)},	/* Sierra Wireless EM7355 QDL */
148 	{DEVICE_SWI(0x1199, 0x901f)},	/* Sierra Wireless EM7355 */
149 	{DEVICE_SWI(0x1199, 0x9040)},	/* Sierra Wireless Modem */
150 	{DEVICE_SWI(0x1199, 0x9041)},	/* Sierra Wireless MC7305/MC7355 */
151 	{DEVICE_SWI(0x1199, 0x9051)},	/* Netgear AirCard 340U */
152 	{DEVICE_SWI(0x1199, 0x9053)},	/* Sierra Wireless Modem */
153 	{DEVICE_SWI(0x1199, 0x9054)},	/* Sierra Wireless Modem */
154 	{DEVICE_SWI(0x1199, 0x9055)},	/* Netgear AirCard 341U */
155 	{DEVICE_SWI(0x1199, 0x9056)},	/* Sierra Wireless Modem */
156 	{DEVICE_SWI(0x1199, 0x9060)},	/* Sierra Wireless Modem */
157 	{DEVICE_SWI(0x1199, 0x9061)},	/* Sierra Wireless Modem */
158 	{DEVICE_SWI(0x1199, 0x9062)},	/* Sierra Wireless EM7305 QDL */
159 	{DEVICE_SWI(0x1199, 0x9063)},	/* Sierra Wireless EM7305 */
160 	{DEVICE_SWI(0x1199, 0x9070)},	/* Sierra Wireless MC74xx */
161 	{DEVICE_SWI(0x1199, 0x9071)},	/* Sierra Wireless MC74xx */
162 	{DEVICE_SWI(0x1199, 0x9078)},	/* Sierra Wireless EM74xx */
163 	{DEVICE_SWI(0x1199, 0x9079)},	/* Sierra Wireless EM74xx */
164 	{DEVICE_SWI(0x1199, 0x907a)},	/* Sierra Wireless EM74xx QDL */
165 	{DEVICE_SWI(0x1199, 0x907b)},	/* Sierra Wireless EM74xx */
166 	{DEVICE_SWI(0x1199, 0x9090)},	/* Sierra Wireless EM7565 QDL */
167 	{DEVICE_SWI(0x1199, 0x9091)},	/* Sierra Wireless EM7565 */
168 	{DEVICE_SWI(0x1199, 0x90d2)},	/* Sierra Wireless EM9191 QDL */
169 	{DEVICE_SWI(0x1199, 0xc080)},	/* Sierra Wireless EM7590 QDL */
170 	{DEVICE_SWI(0x1199, 0xc081)},	/* Sierra Wireless EM7590 */
171 	{DEVICE_SWI(0x413c, 0x81a2)},	/* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
172 	{DEVICE_SWI(0x413c, 0x81a3)},	/* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
173 	{DEVICE_SWI(0x413c, 0x81a4)},	/* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
174 	{DEVICE_SWI(0x413c, 0x81a8)},	/* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
175 	{DEVICE_SWI(0x413c, 0x81a9)},	/* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
176 	{DEVICE_SWI(0x413c, 0x81b1)},	/* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
177 	{DEVICE_SWI(0x413c, 0x81b3)},	/* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
178 	{DEVICE_SWI(0x413c, 0x81b5)},	/* Dell Wireless 5811e QDL */
179 	{DEVICE_SWI(0x413c, 0x81b6)},	/* Dell Wireless 5811e QDL */
180 	{DEVICE_SWI(0x413c, 0x81c2)},	/* Dell Wireless 5811e */
181 	{DEVICE_SWI(0x413c, 0x81cb)},	/* Dell Wireless 5816e QDL */
182 	{DEVICE_SWI(0x413c, 0x81cc)},	/* Dell Wireless 5816e */
183 	{DEVICE_SWI(0x413c, 0x81cf)},   /* Dell Wireless 5819 */
184 	{DEVICE_SWI(0x413c, 0x81d0)},   /* Dell Wireless 5819 */
185 	{DEVICE_SWI(0x413c, 0x81d1)},   /* Dell Wireless 5818 */
186 	{DEVICE_SWI(0x413c, 0x81d2)},   /* Dell Wireless 5818 */
187 	{DEVICE_SWI(0x413c, 0x8217)},	/* Dell Wireless DW5826e */
188 	{DEVICE_SWI(0x413c, 0x8218)},	/* Dell Wireless DW5826e QDL */
189 
190 	/* Huawei devices */
191 	{DEVICE_HWI(0x03f0, 0x581d)},	/* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */
192 
193 	{ }				/* Terminating entry */
194 };
195 MODULE_DEVICE_TABLE(usb, id_table);
196 
197 static int handle_quectel_ec20(struct device *dev, int ifnum)
198 {
199 	int altsetting = 0;
200 
201 	/*
202 	 * Quectel EC20 Mini PCIe LTE module layout:
203 	 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
204 	 * 1: NMEA
205 	 * 2: AT-capable modem port
206 	 * 3: Modem interface
207 	 * 4: NDIS
208 	 */
209 	switch (ifnum) {
210 	case 0:
211 		dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
212 		break;
213 	case 1:
214 		dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
215 		break;
216 	case 2:
217 	case 3:
218 		dev_dbg(dev, "Quectel EC20 Modem port found\n");
219 		break;
220 	case 4:
221 		/* Don't claim the QMI/net interface */
222 		altsetting = -1;
223 		break;
224 	}
225 
226 	return altsetting;
227 }
228 
229 static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
230 {
231 	struct usb_host_interface *intf = serial->interface->cur_altsetting;
232 	struct device *dev = &serial->dev->dev;
233 	int retval = -ENODEV;
234 	__u8 nintf;
235 	__u8 ifnum;
236 	int altsetting = -1;
237 	bool sendsetup = false;
238 
239 	/* we only support vendor specific functions */
240 	if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
241 		goto done;
242 
243 	nintf = serial->dev->actconfig->desc.bNumInterfaces;
244 	dev_dbg(dev, "Num Interfaces = %d\n", nintf);
245 	ifnum = intf->desc.bInterfaceNumber;
246 	dev_dbg(dev, "This Interface = %d\n", ifnum);
247 
248 	if (nintf == 1) {
249 		/* QDL mode */
250 		/* Gobi 2000 has a single altsetting, older ones have two */
251 		if (serial->interface->num_altsetting == 2)
252 			intf = usb_altnum_to_altsetting(serial->interface, 1);
253 		else if (serial->interface->num_altsetting > 2)
254 			goto done;
255 
256 		if (intf && intf->desc.bNumEndpoints == 2 &&
257 		    usb_endpoint_is_bulk_in(&intf->endpoint[0].desc) &&
258 		    usb_endpoint_is_bulk_out(&intf->endpoint[1].desc)) {
259 			dev_dbg(dev, "QDL port found\n");
260 
261 			if (serial->interface->num_altsetting == 1)
262 				retval = 0; /* Success */
263 			else
264 				altsetting = 1;
265 		}
266 		goto done;
267 
268 	}
269 
270 	/* default to enabling interface */
271 	altsetting = 0;
272 
273 	/*
274 	 * Composite mode; don't bind to the QMI/net interface as that
275 	 * gets handled by other drivers.
276 	 */
277 
278 	switch (id->driver_info) {
279 	case QCSERIAL_G1K:
280 		/*
281 		 * Gobi 1K USB layout:
282 		 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
283 		 * 1: serial port (doesn't respond)
284 		 * 2: AT-capable modem port
285 		 * 3: QMI/net
286 		 */
287 		if (nintf < 3 || nintf > 4) {
288 			dev_err(dev, "unknown number of interfaces: %d\n", nintf);
289 			altsetting = -1;
290 			goto done;
291 		}
292 
293 		if (ifnum == 0) {
294 			dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
295 			altsetting = 1;
296 		} else if (ifnum == 2)
297 			dev_dbg(dev, "Modem port found\n");
298 		else
299 			altsetting = -1;
300 		break;
301 	case QCSERIAL_G2K:
302 		/* handle non-standard layouts */
303 		if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
304 			altsetting = handle_quectel_ec20(dev, ifnum);
305 			goto done;
306 		}
307 
308 		/*
309 		 * Gobi 2K+ USB layout:
310 		 * 0: QMI/net
311 		 * 1: DM/DIAG (use libqcdm from ModemManager for communication)
312 		 * 2: AT-capable modem port
313 		 * 3: NMEA
314 		 */
315 		if (nintf < 3 || nintf > 4) {
316 			dev_err(dev, "unknown number of interfaces: %d\n", nintf);
317 			altsetting = -1;
318 			goto done;
319 		}
320 
321 		switch (ifnum) {
322 		case 0:
323 			/* Don't claim the QMI/net interface */
324 			altsetting = -1;
325 			break;
326 		case 1:
327 			dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
328 			break;
329 		case 2:
330 			dev_dbg(dev, "Modem port found\n");
331 			break;
332 		case 3:
333 			/*
334 			 * NMEA (serial line 9600 8N1)
335 			 * # echo "\$GPS_START" > /dev/ttyUSBx
336 			 * # echo "\$GPS_STOP"  > /dev/ttyUSBx
337 			 */
338 			dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
339 			break;
340 		}
341 		break;
342 	case QCSERIAL_SWI:
343 		/*
344 		 * Sierra Wireless layout:
345 		 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
346 		 * 2: NMEA
347 		 * 3: AT-capable modem port
348 		 * 8: QMI/net
349 		 */
350 		switch (ifnum) {
351 		case 0:
352 			dev_dbg(dev, "DM/DIAG interface found\n");
353 			break;
354 		case 2:
355 			dev_dbg(dev, "NMEA GPS interface found\n");
356 			sendsetup = true;
357 			break;
358 		case 3:
359 			dev_dbg(dev, "Modem port found\n");
360 			sendsetup = true;
361 			break;
362 		default:
363 			/* don't claim any unsupported interface */
364 			altsetting = -1;
365 			break;
366 		}
367 		break;
368 	case QCSERIAL_HWI:
369 		/*
370 		 * Huawei devices map functions by subclass + protocol
371 		 * instead of interface numbers. The protocol identify
372 		 * a specific function, while the subclass indicate a
373 		 * specific firmware source
374 		 *
375 		 * This is a list of functions known to be non-serial.  The rest
376 		 * are assumed to be serial and will be handled by this driver
377 		 */
378 		switch (intf->desc.bInterfaceProtocol) {
379 			/* QMI combined (qmi_wwan) */
380 		case 0x07:
381 		case 0x37:
382 		case 0x67:
383 			/* QMI data (qmi_wwan) */
384 		case 0x08:
385 		case 0x38:
386 		case 0x68:
387 			/* QMI control (qmi_wwan) */
388 		case 0x09:
389 		case 0x39:
390 		case 0x69:
391 			/* NCM like (huawei_cdc_ncm) */
392 		case 0x16:
393 		case 0x46:
394 		case 0x76:
395 			altsetting = -1;
396 			break;
397 		default:
398 			dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
399 				intf->desc.bInterfaceClass,
400 				intf->desc.bInterfaceSubClass,
401 				intf->desc.bInterfaceProtocol);
402 		}
403 		break;
404 	default:
405 		dev_err(dev, "unsupported device layout type: %lu\n",
406 			id->driver_info);
407 		break;
408 	}
409 
410 done:
411 	if (altsetting >= 0) {
412 		retval = usb_set_interface(serial->dev, ifnum, altsetting);
413 		if (retval < 0) {
414 			dev_err(dev,
415 				"Could not set interface, error %d\n",
416 				retval);
417 			retval = -ENODEV;
418 		}
419 	}
420 
421 	if (!retval)
422 		usb_set_serial_data(serial, (void *)(unsigned long)sendsetup);
423 
424 	return retval;
425 }
426 
427 static int qc_attach(struct usb_serial *serial)
428 {
429 	struct usb_wwan_intf_private *data;
430 	bool sendsetup;
431 
432 	data = kzalloc(sizeof(*data), GFP_KERNEL);
433 	if (!data)
434 		return -ENOMEM;
435 
436 	sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
437 	if (sendsetup)
438 		data->use_send_setup = 1;
439 
440 	spin_lock_init(&data->susp_lock);
441 
442 	usb_set_serial_data(serial, data);
443 
444 	return 0;
445 }
446 
447 static void qc_release(struct usb_serial *serial)
448 {
449 	struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
450 
451 	usb_set_serial_data(serial, NULL);
452 	kfree(priv);
453 }
454 
455 static struct usb_serial_driver qcdevice = {
456 	.driver = {
457 		.owner     = THIS_MODULE,
458 		.name      = "qcserial",
459 	},
460 	.description         = "Qualcomm USB modem",
461 	.id_table            = id_table,
462 	.num_ports           = 1,
463 	.probe               = qcprobe,
464 	.open		     = usb_wwan_open,
465 	.close		     = usb_wwan_close,
466 	.dtr_rts	     = usb_wwan_dtr_rts,
467 	.write		     = usb_wwan_write,
468 	.write_room	     = usb_wwan_write_room,
469 	.chars_in_buffer     = usb_wwan_chars_in_buffer,
470 	.tiocmget            = usb_wwan_tiocmget,
471 	.tiocmset            = usb_wwan_tiocmset,
472 	.attach              = qc_attach,
473 	.release	     = qc_release,
474 	.port_probe          = usb_wwan_port_probe,
475 	.port_remove	     = usb_wwan_port_remove,
476 #ifdef CONFIG_PM
477 	.suspend	     = usb_wwan_suspend,
478 	.resume		     = usb_wwan_resume,
479 #endif
480 };
481 
482 static struct usb_serial_driver * const serial_drivers[] = {
483 	&qcdevice, NULL
484 };
485 
486 module_usb_serial_driver(serial_drivers, id_table);
487 
488 MODULE_AUTHOR(DRIVER_AUTHOR);
489 MODULE_DESCRIPTION(DRIVER_DESC);
490 MODULE_LICENSE("GPL v2");
491