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 */
24enum 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
38static 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, 0x90e4)}, /* Sierra Wireless EM86xx QDL*/
170 {DEVICE_SWI(0x1199, 0x90e5)}, /* Sierra Wireless EM86xx */
171 {DEVICE_SWI(0x1199, 0xc080)}, /* Sierra Wireless EM7590 QDL */
172 {DEVICE_SWI(0x1199, 0xc081)}, /* Sierra Wireless EM7590 */
173 {DEVICE_SWI(0x413c, 0x81a2)}, /* Dell Wireless 5806 Gobi(TM) 4G LTE Mobile Broadband Card */
174 {DEVICE_SWI(0x413c, 0x81a3)}, /* Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card */
175 {DEVICE_SWI(0x413c, 0x81a4)}, /* Dell Wireless 5570e HSPA+ (42Mbps) Mobile Broadband Card */
176 {DEVICE_SWI(0x413c, 0x81a8)}, /* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
177 {DEVICE_SWI(0x413c, 0x81a9)}, /* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
178 {DEVICE_SWI(0x413c, 0x81b1)}, /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card */
179 {DEVICE_SWI(0x413c, 0x81b3)}, /* Dell Wireless 5809e Gobi(TM) 4G LTE Mobile Broadband Card (rev3) */
180 {DEVICE_SWI(0x413c, 0x81b5)}, /* Dell Wireless 5811e QDL */
181 {DEVICE_SWI(0x413c, 0x81b6)}, /* Dell Wireless 5811e QDL */
182 {DEVICE_SWI(0x413c, 0x81c2)}, /* Dell Wireless 5811e */
183 {DEVICE_SWI(0x413c, 0x81cb)}, /* Dell Wireless 5816e QDL */
184 {DEVICE_SWI(0x413c, 0x81cc)}, /* Dell Wireless 5816e */
185 {DEVICE_SWI(0x413c, 0x81cf)}, /* Dell Wireless 5819 */
186 {DEVICE_SWI(0x413c, 0x81d0)}, /* Dell Wireless 5819 */
187 {DEVICE_SWI(0x413c, 0x81d1)}, /* Dell Wireless 5818 */
188 {DEVICE_SWI(0x413c, 0x81d2)}, /* Dell Wireless 5818 */
189 {DEVICE_SWI(0x413c, 0x8217)}, /* Dell Wireless DW5826e */
190 {DEVICE_SWI(0x413c, 0x8218)}, /* Dell Wireless DW5826e QDL */
191
192 /* Huawei devices */
193 {DEVICE_HWI(0x03f0, 0x581d)}, /* HP lt4112 LTE/HSPA+ Gobi 4G Modem (Huawei me906e) */
194
195 { } /* Terminating entry */
196};
197MODULE_DEVICE_TABLE(usb, id_table);
198
199static int handle_quectel_ec20(struct device *dev, int ifnum)
200{
201 int altsetting = 0;
202
203 /*
204 * Quectel EC20 Mini PCIe LTE module layout:
205 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
206 * 1: NMEA
207 * 2: AT-capable modem port
208 * 3: Modem interface
209 * 4: NDIS
210 */
211 switch (ifnum) {
212 case 0:
213 dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
214 break;
215 case 1:
216 dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
217 break;
218 case 2:
219 case 3:
220 dev_dbg(dev, "Quectel EC20 Modem port found\n");
221 break;
222 case 4:
223 /* Don't claim the QMI/net interface */
224 altsetting = -1;
225 break;
226 }
227
228 return altsetting;
229}
230
231static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
232{
233 struct usb_host_interface *intf = serial->interface->cur_altsetting;
234 struct device *dev = &serial->dev->dev;
235 int retval = -ENODEV;
236 __u8 nintf;
237 __u8 ifnum;
238 int altsetting = -1;
239 bool sendsetup = false;
240
241 /* we only support vendor specific functions */
242 if (intf->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
243 goto done;
244
245 nintf = serial->dev->actconfig->desc.bNumInterfaces;
246 dev_dbg(dev, "Num Interfaces = %d\n", nintf);
247 ifnum = intf->desc.bInterfaceNumber;
248 dev_dbg(dev, "This Interface = %d\n", ifnum);
249
250 if (nintf == 1) {
251 /* QDL mode */
252 /* Gobi 2000 has a single altsetting, older ones have two */
253 if (serial->interface->num_altsetting == 2)
254 intf = usb_altnum_to_altsetting(intf: serial->interface, altnum: 1);
255 else if (serial->interface->num_altsetting > 2)
256 goto done;
257
258 if (intf && intf->desc.bNumEndpoints == 2 &&
259 usb_endpoint_is_bulk_in(epd: &intf->endpoint[0].desc) &&
260 usb_endpoint_is_bulk_out(epd: &intf->endpoint[1].desc)) {
261 dev_dbg(dev, "QDL port found\n");
262
263 if (serial->interface->num_altsetting == 1)
264 retval = 0; /* Success */
265 else
266 altsetting = 1;
267 }
268 goto done;
269
270 }
271
272 /* default to enabling interface */
273 altsetting = 0;
274
275 /*
276 * Composite mode; don't bind to the QMI/net interface as that
277 * gets handled by other drivers.
278 */
279
280 switch (id->driver_info) {
281 case QCSERIAL_G1K:
282 /*
283 * Gobi 1K USB layout:
284 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
285 * 1: serial port (doesn't respond)
286 * 2: AT-capable modem port
287 * 3: QMI/net
288 */
289 if (nintf < 3 || nintf > 4) {
290 dev_err(dev, "unknown number of interfaces: %d\n", nintf);
291 altsetting = -1;
292 goto done;
293 }
294
295 if (ifnum == 0) {
296 dev_dbg(dev, "Gobi 1K DM/DIAG interface found\n");
297 altsetting = 1;
298 } else if (ifnum == 2)
299 dev_dbg(dev, "Modem port found\n");
300 else
301 altsetting = -1;
302 break;
303 case QCSERIAL_G2K:
304 /* handle non-standard layouts */
305 if (nintf == 5 && id->idProduct == QUECTEL_EC20_PID) {
306 altsetting = handle_quectel_ec20(dev, ifnum);
307 goto done;
308 }
309
310 /*
311 * Gobi 2K+ USB layout:
312 * 0: QMI/net
313 * 1: DM/DIAG (use libqcdm from ModemManager for communication)
314 * 2: AT-capable modem port
315 * 3: NMEA
316 */
317 if (nintf < 3 || nintf > 4) {
318 dev_err(dev, "unknown number of interfaces: %d\n", nintf);
319 altsetting = -1;
320 goto done;
321 }
322
323 switch (ifnum) {
324 case 0:
325 /* Don't claim the QMI/net interface */
326 altsetting = -1;
327 break;
328 case 1:
329 dev_dbg(dev, "Gobi 2K+ DM/DIAG interface found\n");
330 break;
331 case 2:
332 dev_dbg(dev, "Modem port found\n");
333 break;
334 case 3:
335 /*
336 * NMEA (serial line 9600 8N1)
337 * # echo "\$GPS_START" > /dev/ttyUSBx
338 * # echo "\$GPS_STOP" > /dev/ttyUSBx
339 */
340 dev_dbg(dev, "Gobi 2K+ NMEA GPS interface found\n");
341 break;
342 }
343 break;
344 case QCSERIAL_SWI:
345 /*
346 * Sierra Wireless layout:
347 * 0: DM/DIAG (use libqcdm from ModemManager for communication)
348 * 2: NMEA
349 * 3: AT-capable modem port
350 * 8: QMI/net
351 */
352 switch (ifnum) {
353 case 0:
354 dev_dbg(dev, "DM/DIAG interface found\n");
355 break;
356 case 2:
357 dev_dbg(dev, "NMEA GPS interface found\n");
358 sendsetup = true;
359 break;
360 case 3:
361 dev_dbg(dev, "Modem port found\n");
362 sendsetup = true;
363 break;
364 default:
365 /* don't claim any unsupported interface */
366 altsetting = -1;
367 break;
368 }
369 break;
370 case QCSERIAL_HWI:
371 /*
372 * Huawei devices map functions by subclass + protocol
373 * instead of interface numbers. The protocol identify
374 * a specific function, while the subclass indicate a
375 * specific firmware source
376 *
377 * This is a list of functions known to be non-serial. The rest
378 * are assumed to be serial and will be handled by this driver
379 */
380 switch (intf->desc.bInterfaceProtocol) {
381 /* QMI combined (qmi_wwan) */
382 case 0x07:
383 case 0x37:
384 case 0x67:
385 /* QMI data (qmi_wwan) */
386 case 0x08:
387 case 0x38:
388 case 0x68:
389 /* QMI control (qmi_wwan) */
390 case 0x09:
391 case 0x39:
392 case 0x69:
393 /* NCM like (huawei_cdc_ncm) */
394 case 0x16:
395 case 0x46:
396 case 0x76:
397 altsetting = -1;
398 break;
399 default:
400 dev_dbg(dev, "Huawei type serial port found (%02x/%02x/%02x)\n",
401 intf->desc.bInterfaceClass,
402 intf->desc.bInterfaceSubClass,
403 intf->desc.bInterfaceProtocol);
404 }
405 break;
406 default:
407 dev_err(dev, "unsupported device layout type: %lu\n",
408 id->driver_info);
409 break;
410 }
411
412done:
413 if (altsetting >= 0) {
414 retval = usb_set_interface(dev: serial->dev, ifnum, alternate: altsetting);
415 if (retval < 0) {
416 dev_err(dev,
417 "Could not set interface, error %d\n",
418 retval);
419 retval = -ENODEV;
420 }
421 }
422
423 if (!retval)
424 usb_set_serial_data(serial, data: (void *)(unsigned long)sendsetup);
425
426 return retval;
427}
428
429static int qc_attach(struct usb_serial *serial)
430{
431 struct usb_wwan_intf_private *data;
432 bool sendsetup;
433
434 data = kzalloc(sizeof(*data), GFP_KERNEL);
435 if (!data)
436 return -ENOMEM;
437
438 sendsetup = !!(unsigned long)(usb_get_serial_data(serial));
439 if (sendsetup)
440 data->use_send_setup = 1;
441
442 spin_lock_init(&data->susp_lock);
443
444 usb_set_serial_data(serial, data);
445
446 return 0;
447}
448
449static void qc_release(struct usb_serial *serial)
450{
451 struct usb_wwan_intf_private *priv = usb_get_serial_data(serial);
452
453 usb_set_serial_data(serial, NULL);
454 kfree(objp: priv);
455}
456
457static struct usb_serial_driver qcdevice = {
458 .driver = {
459 .name = "qcserial",
460 },
461 .description = "Qualcomm USB modem",
462 .id_table = id_table,
463 .num_ports = 1,
464 .probe = qcprobe,
465 .open = usb_wwan_open,
466 .close = usb_wwan_close,
467 .dtr_rts = usb_wwan_dtr_rts,
468 .write = usb_wwan_write,
469 .write_room = usb_wwan_write_room,
470 .chars_in_buffer = usb_wwan_chars_in_buffer,
471 .tiocmget = usb_wwan_tiocmget,
472 .tiocmset = usb_wwan_tiocmset,
473 .attach = qc_attach,
474 .release = qc_release,
475 .port_probe = usb_wwan_port_probe,
476 .port_remove = usb_wwan_port_remove,
477#ifdef CONFIG_PM
478 .suspend = usb_wwan_suspend,
479 .resume = usb_wwan_resume,
480#endif
481};
482
483static struct usb_serial_driver * const serial_drivers[] = {
484 &qcdevice, NULL
485};
486
487module_usb_serial_driver(serial_drivers, id_table);
488
489MODULE_AUTHOR(DRIVER_AUTHOR);
490MODULE_DESCRIPTION(DRIVER_DESC);
491MODULE_LICENSE("GPL v2");
492

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source code of linux/drivers/usb/serial/qcserial.c