2 * Copyright (c) 2012 Bjørn Mork <bjorn@mork.no>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * version 2 as published by the Free Software Foundation.
9 #include <linux/module.h>
10 #include <linux/netdevice.h>
11 #include <linux/ethtool.h>
12 #include <linux/mii.h>
13 #include <linux/usb.h>
14 #include <linux/usb/cdc.h>
15 #include <linux/usb/usbnet.h>
16 #include <linux/usb/cdc-wdm.h>
18 /* The name of the CDC Device Management driver */
19 #define DM_DRIVER "cdc_wdm"
22 * This driver supports wwan (3G/LTE/?) devices using a vendor
23 * specific management protocol called Qualcomm MSM Interface (QMI) -
24 * in addition to the more common AT commands over serial interface
27 * QMI is wrapped in CDC, using CDC encapsulated commands on the
28 * control ("master") interface of a two-interface CDC Union
29 * resembling standard CDC ECM. The devices do not use the control
30 * interface for any other CDC messages. Most likely because the
31 * management protocol is used in place of the standard CDC
32 * notifications NOTIFY_NETWORK_CONNECTION and NOTIFY_SPEED_CHANGE
34 * Handling a protocol like QMI is out of the scope for any driver.
35 * It can be exported as a character device using the cdc-wdm driver,
36 * which will enable userspace applications ("modem managers") to
37 * handle it. This may be required to use the network interface
38 * provided by the driver.
40 * These devices may alternatively/additionally be configured using AT
41 * commands on any of the serial interfaces driven by the option driver
43 * This driver binds only to the data ("slave") interface to enable
44 * the cdc-wdm driver to bind to the control interface. It still
45 * parses the CDC functional descriptors on the control interface to
46 * a) verify that this is indeed a handled interface (CDC Union
47 * header lists it as slave)
48 * b) get MAC address and other ethernet config from the CDC Ethernet
50 * c) enable user bind requests against the control interface, which
51 * is the common way to bind to CDC Ethernet Control Model type
53 * d) provide a hint to the user about which interface is the
54 * corresponding management interface
57 static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
60 struct usb_interface *control = NULL;
61 u8 *buf = intf->cur_altsetting->extra;
62 int len = intf->cur_altsetting->extralen;
63 struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
64 struct usb_cdc_union_desc *cdc_union = NULL;
65 struct usb_cdc_ether_desc *cdc_ether = NULL;
66 u32 required = 1 << USB_CDC_HEADER_TYPE | 1 << USB_CDC_UNION_TYPE;
68 atomic_t *pmcount = (void *)&dev->data[1];
70 atomic_set(pmcount, 0);
73 * assume a data interface has no additional descriptors and
74 * that the control and data interface are numbered
75 * consecutively - this holds for the Huawei device at least
77 if (len == 0 && desc->bInterfaceNumber > 0) {
78 control = usb_ifnum_to_if(dev->udev, desc->bInterfaceNumber - 1);
82 buf = control->cur_altsetting->extra;
83 len = control->cur_altsetting->extralen;
84 dev_dbg(&intf->dev, "guessing \"control\" => %s, \"data\" => this\n",
85 dev_name(&control->dev));
89 struct usb_descriptor_header *h = (void *)buf;
91 /* ignore any misplaced descriptors */
92 if (h->bDescriptorType != USB_DT_CS_INTERFACE)
95 /* buf[2] is CDC descriptor subtype */
97 case USB_CDC_HEADER_TYPE:
98 if (found & 1 << USB_CDC_HEADER_TYPE) {
99 dev_dbg(&intf->dev, "extra CDC header\n");
102 if (h->bLength != sizeof(struct usb_cdc_header_desc)) {
103 dev_dbg(&intf->dev, "CDC header len %u\n", h->bLength);
107 case USB_CDC_UNION_TYPE:
108 if (found & 1 << USB_CDC_UNION_TYPE) {
109 dev_dbg(&intf->dev, "extra CDC union\n");
112 if (h->bLength != sizeof(struct usb_cdc_union_desc)) {
113 dev_dbg(&intf->dev, "CDC union len %u\n", h->bLength);
116 cdc_union = (struct usb_cdc_union_desc *)buf;
118 case USB_CDC_ETHERNET_TYPE:
119 if (found & 1 << USB_CDC_ETHERNET_TYPE) {
120 dev_dbg(&intf->dev, "extra CDC ether\n");
123 if (h->bLength != sizeof(struct usb_cdc_ether_desc)) {
124 dev_dbg(&intf->dev, "CDC ether len %u\n", h->bLength);
127 cdc_ether = (struct usb_cdc_ether_desc *)buf;
132 * Remember which CDC functional descriptors we've seen. Works
133 * for all types we care about, of which USB_CDC_ETHERNET_TYPE
134 * (0x0f) is the highest numbered
137 found |= 1 << buf[2];
144 /* did we find all the required ones? */
145 if ((found & required) != required) {
146 dev_err(&intf->dev, "CDC functional descriptors missing\n");
150 /* give the user a helpful hint if trying to bind to the wrong interface */
151 if (cdc_union && desc->bInterfaceNumber == cdc_union->bMasterInterface0) {
152 dev_err(&intf->dev, "leaving \"control\" interface for " DM_DRIVER " - try binding to %s instead!\n",
153 dev_name(&usb_ifnum_to_if(dev->udev, cdc_union->bSlaveInterface0)->dev));
157 /* errors aren't fatal - we can live with the dynamic address */
159 dev->hard_mtu = le16_to_cpu(cdc_ether->wMaxSegmentSize);
160 usbnet_get_ethernet_addr(dev, cdc_ether->iMACAddress);
163 /* success! point the user to the management interface */
165 dev_info(&intf->dev, "Use \"" DM_DRIVER "\" for QMI interface %s\n",
166 dev_name(&control->dev));
168 /* XXX: add a sysfs symlink somewhere to help management applications find it? */
170 /* collect bulk endpoints now that we know intf == "data" interface */
171 status = usbnet_get_endpoints(dev, intf);
177 /* using a counter to merge subdriver requests with our own into a combined state */
178 static int qmi_wwan_manage_power(struct usbnet *dev, int on)
180 atomic_t *pmcount = (void *)&dev->data[1];
183 dev_dbg(&dev->intf->dev, "%s() pmcount=%d, on=%d\n", __func__, atomic_read(pmcount), on);
185 if ((on && atomic_add_return(1, pmcount) == 1) || (!on && atomic_dec_and_test(pmcount))) {
186 /* need autopm_get/put here to ensure the usbcore sees the new value */
187 rv = usb_autopm_get_interface(dev->intf);
190 dev->intf->needs_remote_wakeup = on;
191 usb_autopm_put_interface(dev->intf);
197 static int qmi_wwan_cdc_wdm_manage_power(struct usb_interface *intf, int on)
199 struct usbnet *dev = usb_get_intfdata(intf);
201 /* can be called while disconnecting */
204 return qmi_wwan_manage_power(dev, on);
207 /* Some devices combine the "control" and "data" functions into a
208 * single interface with all three endpoints: interrupt + bulk in and
211 * Setting up cdc-wdm as a subdriver owning the interrupt endpoint
212 * will let it provide userspace access to the encapsulated QMI
213 * protocol without interfering with the usbnet operations.
215 static int qmi_wwan_bind_shared(struct usbnet *dev, struct usb_interface *intf)
218 struct usb_driver *subdriver = NULL;
219 atomic_t *pmcount = (void *)&dev->data[1];
221 /* ZTE makes devices where the interface descriptors and endpoint
222 * configurations of two or more interfaces are identical, even
223 * though the functions are completely different. If set, then
224 * driver_info->data is a bitmap of acceptable interface numbers
225 * allowing us to bind to one such interface without binding to
228 if (dev->driver_info->data &&
229 !test_bit(intf->cur_altsetting->desc.bInterfaceNumber, &dev->driver_info->data)) {
230 dev_info(&intf->dev, "not on our whitelist - ignored");
235 atomic_set(pmcount, 0);
237 /* collect all three endpoints */
238 rv = usbnet_get_endpoints(dev, intf);
242 /* require interrupt endpoint for subdriver */
248 subdriver = usb_cdc_wdm_register(intf, &dev->status->desc, 512, &qmi_wwan_cdc_wdm_manage_power);
249 if (IS_ERR(subdriver)) {
250 rv = PTR_ERR(subdriver);
254 /* can't let usbnet use the interrupt endpoint */
257 /* save subdriver struct for suspend/resume wrappers */
258 dev->data[0] = (unsigned long)subdriver;
264 static void qmi_wwan_unbind_shared(struct usbnet *dev, struct usb_interface *intf)
266 struct usb_driver *subdriver = (void *)dev->data[0];
268 if (subdriver && subdriver->disconnect)
269 subdriver->disconnect(intf);
271 dev->data[0] = (unsigned long)NULL;
274 /* suspend/resume wrappers calling both usbnet and the cdc-wdm
275 * subdriver if present.
277 * NOTE: cdc-wdm also supports pre/post_reset, but we cannot provide
278 * wrappers for those without adding usbnet reset support first.
280 static int qmi_wwan_suspend(struct usb_interface *intf, pm_message_t message)
282 struct usbnet *dev = usb_get_intfdata(intf);
283 struct usb_driver *subdriver = (void *)dev->data[0];
286 ret = usbnet_suspend(intf, message);
290 if (subdriver && subdriver->suspend)
291 ret = subdriver->suspend(intf, message);
298 static int qmi_wwan_resume(struct usb_interface *intf)
300 struct usbnet *dev = usb_get_intfdata(intf);
301 struct usb_driver *subdriver = (void *)dev->data[0];
304 if (subdriver && subdriver->resume)
305 ret = subdriver->resume(intf);
308 ret = usbnet_resume(intf);
309 if (ret < 0 && subdriver && subdriver->resume && subdriver->suspend)
310 subdriver->suspend(intf, PMSG_SUSPEND);
316 static const struct driver_info qmi_wwan_info = {
317 .description = "QMI speaking wwan device",
319 .bind = qmi_wwan_bind,
320 .manage_power = qmi_wwan_manage_power,
323 static const struct driver_info qmi_wwan_shared = {
324 .description = "QMI speaking wwan device with combined interface",
326 .bind = qmi_wwan_bind_shared,
327 .unbind = qmi_wwan_unbind_shared,
328 .manage_power = qmi_wwan_manage_power,
331 static const struct driver_info qmi_wwan_force_int0 = {
332 .description = "Qualcomm WWAN/QMI device",
334 .bind = qmi_wwan_bind_shared,
335 .unbind = qmi_wwan_unbind_shared,
336 .manage_power = qmi_wwan_manage_power,
337 .data = BIT(0), /* interface whitelist bitmap */
340 static const struct driver_info qmi_wwan_force_int1 = {
341 .description = "Qualcomm WWAN/QMI device",
343 .bind = qmi_wwan_bind_shared,
344 .unbind = qmi_wwan_unbind_shared,
345 .manage_power = qmi_wwan_manage_power,
346 .data = BIT(1), /* interface whitelist bitmap */
349 static const struct driver_info qmi_wwan_force_int3 = {
350 .description = "Qualcomm WWAN/QMI device",
352 .bind = qmi_wwan_bind_shared,
353 .unbind = qmi_wwan_unbind_shared,
354 .manage_power = qmi_wwan_manage_power,
355 .data = BIT(3), /* interface whitelist bitmap */
358 static const struct driver_info qmi_wwan_force_int4 = {
359 .description = "Qualcomm WWAN/QMI device",
361 .bind = qmi_wwan_bind_shared,
362 .unbind = qmi_wwan_unbind_shared,
363 .manage_power = qmi_wwan_manage_power,
364 .data = BIT(4), /* interface whitelist bitmap */
367 /* Sierra Wireless provide equally useless interface descriptors
368 * Devices in QMI mode can be switched between two different
370 * a) USB interface #8 is QMI/wwan
371 * b) USB interfaces #8, #19 and #20 are QMI/wwan
373 * Both configurations provide a number of other interfaces (serial++),
374 * some of which have the same endpoint configuration as we expect, so
375 * a whitelist or blacklist is necessary.
377 * FIXME: The below whitelist should include BIT(20). It does not
378 * because I cannot get it to work...
380 static const struct driver_info qmi_wwan_sierra = {
381 .description = "Sierra Wireless wwan/QMI device",
383 .bind = qmi_wwan_bind_shared,
384 .unbind = qmi_wwan_unbind_shared,
385 .manage_power = qmi_wwan_manage_power,
386 .data = BIT(8) | BIT(19), /* interface whitelist bitmap */
389 #define HUAWEI_VENDOR_ID 0x12D1
391 /* Gobi 1000 QMI/wwan interface number is 3 according to qcserial */
392 #define QMI_GOBI1K_DEVICE(vend, prod) \
393 USB_DEVICE(vend, prod), \
394 .driver_info = (unsigned long)&qmi_wwan_force_int3
396 /* Gobi 2000 and Gobi 3000 QMI/wwan interface number is 0 according to qcserial */
397 #define QMI_GOBI_DEVICE(vend, prod) \
398 USB_DEVICE(vend, prod), \
399 .driver_info = (unsigned long)&qmi_wwan_force_int0
401 static const struct usb_device_id products[] = {
402 { /* Huawei E392, E398 and possibly others sharing both device id and more... */
403 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_INFO,
404 .idVendor = HUAWEI_VENDOR_ID,
405 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
406 .bInterfaceSubClass = 1,
407 .bInterfaceProtocol = 8, /* NOTE: This is the *slave* interface of the CDC Union! */
408 .driver_info = (unsigned long)&qmi_wwan_info,
410 { /* Vodafone/Huawei K5005 (12d1:14c8) and similar modems */
411 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_INFO,
412 .idVendor = HUAWEI_VENDOR_ID,
413 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
414 .bInterfaceSubClass = 1,
415 .bInterfaceProtocol = 56, /* NOTE: This is the *slave* interface of the CDC Union! */
416 .driver_info = (unsigned long)&qmi_wwan_info,
418 { /* Huawei E392, E398 and possibly others in "Windows mode"
419 * using a combined control and data interface without any CDC
420 * functional descriptors
422 .match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_INFO,
423 .idVendor = HUAWEI_VENDOR_ID,
424 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
425 .bInterfaceSubClass = 1,
426 .bInterfaceProtocol = 17,
427 .driver_info = (unsigned long)&qmi_wwan_shared,
429 { /* Pantech UML290 */
430 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
433 .bInterfaceClass = 0xff,
434 .bInterfaceSubClass = 0xf0,
435 .bInterfaceProtocol = 0xff,
436 .driver_info = (unsigned long)&qmi_wwan_shared,
439 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
442 .bInterfaceClass = 0xff,
443 .bInterfaceSubClass = 0xff,
444 .bInterfaceProtocol = 0xff,
445 .driver_info = (unsigned long)&qmi_wwan_force_int4,
447 { /* ZTE (Vodafone) K3520-Z */
448 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
451 .bInterfaceClass = 0xff,
452 .bInterfaceSubClass = 0xff,
453 .bInterfaceProtocol = 0xff,
454 .driver_info = (unsigned long)&qmi_wwan_force_int1,
456 { /* ZTE (Vodafone) K3565-Z */
457 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
460 .bInterfaceClass = 0xff,
461 .bInterfaceSubClass = 0xff,
462 .bInterfaceProtocol = 0xff,
463 .driver_info = (unsigned long)&qmi_wwan_force_int4,
465 { /* ZTE (Vodafone) K3570-Z */
466 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
469 .bInterfaceClass = 0xff,
470 .bInterfaceSubClass = 0xff,
471 .bInterfaceProtocol = 0xff,
472 .driver_info = (unsigned long)&qmi_wwan_force_int4,
474 { /* ZTE (Vodafone) K3571-Z */
475 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
478 .bInterfaceClass = 0xff,
479 .bInterfaceSubClass = 0xff,
480 .bInterfaceProtocol = 0xff,
481 .driver_info = (unsigned long)&qmi_wwan_force_int4,
483 { /* ZTE (Vodafone) K3765-Z */
484 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
487 .bInterfaceClass = 0xff,
488 .bInterfaceSubClass = 0xff,
489 .bInterfaceProtocol = 0xff,
490 .driver_info = (unsigned long)&qmi_wwan_force_int4,
492 { /* ZTE (Vodafone) K4505-Z */
493 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
496 .bInterfaceClass = 0xff,
497 .bInterfaceSubClass = 0xff,
498 .bInterfaceProtocol = 0xff,
499 .driver_info = (unsigned long)&qmi_wwan_force_int4,
501 { /* Sierra Wireless MC77xx in QMI mode */
502 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_INT_INFO,
505 .bInterfaceClass = 0xff,
506 .bInterfaceSubClass = 0xff,
507 .bInterfaceProtocol = 0xff,
508 .driver_info = (unsigned long)&qmi_wwan_sierra,
511 /* Gobi 1000 devices */
512 {QMI_GOBI1K_DEVICE(0x05c6, 0x9212)}, /* Acer Gobi Modem Device */
513 {QMI_GOBI1K_DEVICE(0x03f0, 0x1f1d)}, /* HP un2400 Gobi Modem Device */
514 {QMI_GOBI1K_DEVICE(0x03f0, 0x371d)}, /* HP un2430 Mobile Broadband Module */
515 {QMI_GOBI1K_DEVICE(0x04da, 0x250d)}, /* Panasonic Gobi Modem device */
516 {QMI_GOBI1K_DEVICE(0x413c, 0x8172)}, /* Dell Gobi Modem device */
517 {QMI_GOBI1K_DEVICE(0x1410, 0xa001)}, /* Novatel Gobi Modem device */
518 {QMI_GOBI1K_DEVICE(0x0b05, 0x1776)}, /* Asus Gobi Modem device */
519 {QMI_GOBI1K_DEVICE(0x19d2, 0xfff3)}, /* ONDA Gobi Modem device */
520 {QMI_GOBI1K_DEVICE(0x05c6, 0x9001)}, /* Generic Gobi Modem device */
521 {QMI_GOBI1K_DEVICE(0x05c6, 0x9002)}, /* Generic Gobi Modem device */
522 {QMI_GOBI1K_DEVICE(0x05c6, 0x9202)}, /* Generic Gobi Modem device */
523 {QMI_GOBI1K_DEVICE(0x05c6, 0x9203)}, /* Generic Gobi Modem device */
524 {QMI_GOBI1K_DEVICE(0x05c6, 0x9222)}, /* Generic Gobi Modem device */
525 {QMI_GOBI1K_DEVICE(0x05c6, 0x9009)}, /* Generic Gobi Modem device */
527 /* Gobi 2000 and 3000 devices */
528 {QMI_GOBI_DEVICE(0x413c, 0x8186)}, /* Dell Gobi 2000 Modem device (N0218, VU936) */
529 {QMI_GOBI_DEVICE(0x05c6, 0x920b)}, /* Generic Gobi 2000 Modem device */
530 {QMI_GOBI_DEVICE(0x05c6, 0x9225)}, /* Sony Gobi 2000 Modem device (N0279, VU730) */
531 {QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
532 {QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
533 {QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
534 {QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
535 {QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
536 {QMI_GOBI_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
537 {QMI_GOBI_DEVICE(0x1199, 0x9001)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
538 {QMI_GOBI_DEVICE(0x1199, 0x9002)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
539 {QMI_GOBI_DEVICE(0x1199, 0x9003)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
540 {QMI_GOBI_DEVICE(0x1199, 0x9004)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
541 {QMI_GOBI_DEVICE(0x1199, 0x9005)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
542 {QMI_GOBI_DEVICE(0x1199, 0x9006)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
543 {QMI_GOBI_DEVICE(0x1199, 0x9007)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
544 {QMI_GOBI_DEVICE(0x1199, 0x9008)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
545 {QMI_GOBI_DEVICE(0x1199, 0x9009)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
546 {QMI_GOBI_DEVICE(0x1199, 0x900a)}, /* Sierra Wireless Gobi 2000 Modem device (VT773) */
547 {QMI_GOBI_DEVICE(0x1199, 0x9011)}, /* Sierra Wireless Gobi 2000 Modem device (MC8305) */
548 {QMI_GOBI_DEVICE(0x16d8, 0x8002)}, /* CMDTech Gobi 2000 Modem device (VU922) */
549 {QMI_GOBI_DEVICE(0x05c6, 0x9205)}, /* Gobi 2000 Modem device */
550 {QMI_GOBI_DEVICE(0x1199, 0x9013)}, /* Sierra Wireless Gobi 3000 Modem device (MC8355) */
551 {QMI_GOBI_DEVICE(0x1199, 0x9015)}, /* Sierra Wireless Gobi 3000 Modem device */
552 {QMI_GOBI_DEVICE(0x1199, 0x9019)}, /* Sierra Wireless Gobi 3000 Modem device */
555 MODULE_DEVICE_TABLE(usb, products);
557 static struct usb_driver qmi_wwan_driver = {
559 .id_table = products,
560 .probe = usbnet_probe,
561 .disconnect = usbnet_disconnect,
562 .suspend = qmi_wwan_suspend,
563 .resume = qmi_wwan_resume,
564 .reset_resume = qmi_wwan_resume,
565 .supports_autosuspend = 1,
566 .disable_hub_initiated_lpm = 1,
569 static int __init qmi_wwan_init(void)
571 return usb_register(&qmi_wwan_driver);
573 module_init(qmi_wwan_init);
575 static void __exit qmi_wwan_exit(void)
577 usb_deregister(&qmi_wwan_driver);
579 module_exit(qmi_wwan_exit);
581 MODULE_AUTHOR("Bjørn Mork <bjorn@mork.no>");
582 MODULE_DESCRIPTION("Qualcomm MSM Interface (QMI) WWAN driver");
583 MODULE_LICENSE("GPL");