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[PATCH] USB: minor gadget/rndis tweak
[deliverable/linux.git] / drivers / usb / gadget / ether.c
CommitLineData
1da177e4
LT		 1/*
2 * ether.c -- Ethernet gadget driver, with CDC and non-CDC options
3 *
4 * Copyright (C) 2003-2005 David Brownell
5 * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22
23// #define DEBUG 1
24// #define VERBOSE
25
26#include <linux/config.h>
27#include <linux/module.h>
28#include <linux/kernel.h>
29#include <linux/delay.h>
30#include <linux/ioport.h>
31#include <linux/sched.h>
32#include <linux/slab.h>
33#include <linux/smp_lock.h>
34#include <linux/errno.h>
35#include <linux/init.h>
36#include <linux/timer.h>
37#include <linux/list.h>
38#include <linux/interrupt.h>
39#include <linux/utsname.h>
40#include <linux/device.h>
41#include <linux/moduleparam.h>
42#include <linux/ctype.h>
43
44#include <asm/byteorder.h>
45#include <asm/io.h>
46#include <asm/irq.h>
47#include <asm/system.h>
48#include <asm/uaccess.h>
49#include <asm/unaligned.h>
50
51#include <linux/usb_ch9.h>
52#include <linux/usb_cdc.h>
53#include <linux/usb_gadget.h>
54
55#include <linux/random.h>
56#include <linux/netdevice.h>
57#include <linux/etherdevice.h>
58#include <linux/ethtool.h>
59
60#include "gadget_chips.h"
61
62/*-------------------------------------------------------------------------*/
63
64/*
65 * Ethernet gadget driver -- with CDC and non-CDC options
66 * Builds on hardware support for a full duplex link.
67 *
68 * CDC Ethernet is the standard USB solution for sending Ethernet frames
69 * using USB. Real hardware tends to use the same framing protocol but look
70 * different for control features. This driver strongly prefers to use
71 * this USB-IF standard as its open-systems interoperability solution;
72 * most host side USB stacks (except from Microsoft) support it.
73 *
74 * There's some hardware that can't talk CDC. We make that hardware
75 * implement a "minimalist" vendor-agnostic CDC core: same framing, but
76 * link-level setup only requires activating the configuration.
77 * Linux supports it, but other host operating systems may not.
78 * (This is a subset of CDC Ethernet.)
79 *
80 * A third option is also in use. Rather than CDC Ethernet, or something
81 * simpler, Microsoft pushes their own approach: RNDIS. The published
82 * RNDIS specs are ambiguous and appear to be incomplete, and are also
83 * needlessly complex.
84 */
85
86#define DRIVER_DESC "Ethernet Gadget"
907cba35 87#define DRIVER_VERSION "May Day 2005"
1da177e4
LT		 88
89static const char shortname [] = "ether";
90static const char driver_desc [] = DRIVER_DESC;
91
92#define RX_EXTRA 20 /* guard against rx overflows */
93
1da177e4 94#include "rndis.h"
45e45ab4
DB		 95
96#ifndef CONFIG_USB_ETH_RNDIS
97#define rndis_uninit(x) do{}while(0)
98#define rndis_deregister(c) do{}while(0)
99#define rndis_exit() do{}while(0)
1da177e4
LT		 100#endif
101
102/* CDC and RNDIS support the same host-chosen outgoing packet filters. */
103#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
6cdee106
DB		 104 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
105 |USB_CDC_PACKET_TYPE_PROMISCUOUS \
1da177e4
LT		 106 |USB_CDC_PACKET_TYPE_DIRECTED)
107
108
109/*-------------------------------------------------------------------------*/
110
111struct eth_dev {
112 spinlock_t lock;
113 struct usb_gadget *gadget;
114 struct usb_request *req; /* for control responses */
115 struct usb_request *stat_req; /* for cdc & rndis status */
116
117 u8 config;
118 struct usb_ep *in_ep, *out_ep, *status_ep;
119 const struct usb_endpoint_descriptor
120 *in, *out, *status;
121 struct list_head tx_reqs, rx_reqs;
122
123 struct net_device *net;
124 struct net_device_stats stats;
125 atomic_t tx_qlen;
126
127 struct work_struct work;
128 unsigned zlp:1;
129 unsigned cdc:1;
130 unsigned rndis:1;
131 unsigned suspended:1;
132 u16 cdc_filter;
133 unsigned long todo;
134#define WORK_RX_MEMORY 0
135 int rndis_config;
136 u8 host_mac [ETH_ALEN];
137};
138
139/* This version autoconfigures as much as possible at run-time.
140 *
141 * It also ASSUMES a self-powered device, without remote wakeup,
142 * although remote wakeup support would make sense.
143 */
1da177e4
LT		 144
145/*-------------------------------------------------------------------------*/
146
147/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
148 * Instead: allocate your own, using normal USB-IF procedures.
149 */
150
151/* Thanks to NetChip Technologies for donating this product ID.
152 * It's for devices with only CDC Ethernet configurations.
153 */
154#define CDC_VENDOR_NUM 0x0525 /* NetChip */
155#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
156
157/* For hardware that can't talk CDC, we use the same vendor ID that
158 * ARM Linux has used for ethernet-over-usb, both with sa1100 and
159 * with pxa250. We're protocol-compatible, if the host-side drivers
160 * use the endpoint descriptors. bcdDevice (version) is nonzero, so
161 * drivers that need to hard-wire endpoint numbers have a hook.
162 *
163 * The protocol is a minimal subset of CDC Ether, which works on any bulk
164 * hardware that's not deeply broken ... even on hardware that can't talk
165 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
166 * doesn't handle control-OUT).
167 */
168#define SIMPLE_VENDOR_NUM 0x049f
169#define SIMPLE_PRODUCT_NUM 0x505a
170
171/* For hardware that can talk RNDIS and either of the above protocols,
172 * use this ID ... the windows INF files will know it. Unless it's
173 * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
174 * the non-RNDIS configuration.
175 */
176#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
177#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
178
179
180/* Some systems will want different product identifers published in the
181 * device descriptor, either numbers or strings or both. These string
182 * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
183 */
184
185static ushort __initdata idVendor;
186module_param(idVendor, ushort, S_IRUGO);
187MODULE_PARM_DESC(idVendor, "USB Vendor ID");
188
189static ushort __initdata idProduct;
190module_param(idProduct, ushort, S_IRUGO);
191MODULE_PARM_DESC(idProduct, "USB Product ID");
192
193static ushort __initdata bcdDevice;
194module_param(bcdDevice, ushort, S_IRUGO);
195MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
196
197static char *__initdata iManufacturer;
198module_param(iManufacturer, charp, S_IRUGO);
199MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
200
201static char *__initdata iProduct;
202module_param(iProduct, charp, S_IRUGO);
203MODULE_PARM_DESC(iProduct, "USB Product string");
204
205/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
206static char *__initdata dev_addr;
207module_param(dev_addr, charp, S_IRUGO);
208MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
209
210/* this address is invisible to ifconfig */
211static char *__initdata host_addr;
212module_param(host_addr, charp, S_IRUGO);
213MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
214
215
216/*-------------------------------------------------------------------------*/
217
218/* Include CDC support if we could run on CDC-capable hardware. */
219
220#ifdef CONFIG_USB_GADGET_NET2280
221#define DEV_CONFIG_CDC
222#endif
223
224#ifdef CONFIG_USB_GADGET_DUMMY_HCD
225#define DEV_CONFIG_CDC
226#endif
227
228#ifdef CONFIG_USB_GADGET_GOKU
229#define DEV_CONFIG_CDC
230#endif
231
232#ifdef CONFIG_USB_GADGET_LH7A40X
233#define DEV_CONFIG_CDC
234#endif
235
236#ifdef CONFIG_USB_GADGET_MQ11XX
237#define DEV_CONFIG_CDC
238#endif
239
240#ifdef CONFIG_USB_GADGET_OMAP
241#define DEV_CONFIG_CDC
242#endif
243
244#ifdef CONFIG_USB_GADGET_N9604
245#define DEV_CONFIG_CDC
246#endif
247
248#ifdef CONFIG_USB_GADGET_PXA27X
249#define DEV_CONFIG_CDC
250#endif
251
252#ifdef CONFIG_USB_GADGET_AT91
253#define DEV_CONFIG_CDC
254#endif
255
256
257/* For CDC-incapable hardware, choose the simple cdc subset.
258 * Anything that talks bulk (without notable bugs) can do this.
259 */
260#ifdef CONFIG_USB_GADGET_PXA2XX
261#define DEV_CONFIG_SUBSET
262#endif
263
264#ifdef CONFIG_USB_GADGET_SH
265#define DEV_CONFIG_SUBSET
266#endif
267
268#ifdef CONFIG_USB_GADGET_SA1100
269/* use non-CDC for backwards compatibility */
270#define DEV_CONFIG_SUBSET
271#endif
272
273#ifdef CONFIG_USB_GADGET_S3C2410
274#define DEV_CONFIG_CDC
275#endif
276
277/*-------------------------------------------------------------------------*/
278
279/* "main" config is either CDC, or its simple subset */
280static inline int is_cdc(struct eth_dev *dev)
281{
282#if !defined(DEV_CONFIG_SUBSET)
283 return 1; /* only cdc possible */
284#elif !defined (DEV_CONFIG_CDC)
285 return 0; /* only subset possible */
286#else
287 return dev->cdc; /* depends on what hardware we found */
288#endif
289}
290
291/* "secondary" RNDIS config may sometimes be activated */
292static inline int rndis_active(struct eth_dev *dev)
293{
294#ifdef CONFIG_USB_ETH_RNDIS
295 return dev->rndis;
296#else
297 return 0;
298#endif
299}
300
301#define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev))
302#define cdc_active(dev) ( is_cdc(dev) && !rndis_active(dev))
303
304
305
306#define DEFAULT_QLEN 2 /* double buffering by default */
307
308/* peak bulk transfer bits-per-second */
309#define HS_BPS (13 * 512 * 8 * 1000 * 8)
310#define FS_BPS (19 * 64 * 1 * 1000 * 8)
311
312#ifdef CONFIG_USB_GADGET_DUALSPEED
907cba35 313#define DEVSPEED USB_SPEED_HIGH
1da177e4
LT		 314
315static unsigned qmult = 5;
316module_param (qmult, uint, S_IRUGO|S_IWUSR);
317
318
319/* for dual-speed hardware, use deeper queues at highspeed */
320#define qlen(gadget) \
321 (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
322
323/* also defer IRQs on highspeed TX */
324#define TX_DELAY qmult
325
6cdee106
DB		 326static inline int BITRATE(struct usb_gadget *g)
327{
328 return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
329}
1da177e4
LT		 330
331#else /* full speed (low speed doesn't do bulk) */
907cba35
DB		 332#define DEVSPEED USB_SPEED_FULL
333
1da177e4
LT		 334#define qlen(gadget) DEFAULT_QLEN
335
6cdee106
DB		 336static inline int BITRATE(struct usb_gadget *g)
337{
338 return FS_BPS;
339}
1da177e4
LT		 340#endif
341
342
343/*-------------------------------------------------------------------------*/
344
345#define xprintk(d,level,fmt,args...) \
346 printk(level "%s: " fmt , (d)->net->name , ## args)
347
348#ifdef DEBUG
349#undef DEBUG
350#define DEBUG(dev,fmt,args...) \
351 xprintk(dev , KERN_DEBUG , fmt , ## args)
352#else
353#define DEBUG(dev,fmt,args...) \
354 do { } while (0)
355#endif /* DEBUG */
356
357#ifdef VERBOSE
358#define VDEBUG DEBUG
359#else
360#define VDEBUG(dev,fmt,args...) \
361 do { } while (0)
362#endif /* DEBUG */
363
364#define ERROR(dev,fmt,args...) \
365 xprintk(dev , KERN_ERR , fmt , ## args)
366#define WARN(dev,fmt,args...) \
367 xprintk(dev , KERN_WARNING , fmt , ## args)
368#define INFO(dev,fmt,args...) \
369 xprintk(dev , KERN_INFO , fmt , ## args)
370
371/*-------------------------------------------------------------------------*/
372
373/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
374 * ep0 implementation: descriptors, config management, setup().
375 * also optional class-specific notification interrupt transfer.
376 */
377
378/*
379 * DESCRIPTORS ... most are static, but strings and (full) configuration
380 * descriptors are built on demand. For now we do either full CDC, or
381 * our simple subset, with RNDIS as an optional second configuration.
382 *
383 * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But
384 * the class descriptors match a modem (they're ignored; it's really just
385 * Ethernet functionality), they don't need the NOP altsetting, and the
386 * status transfer endpoint isn't optional.
387 */
388
389#define STRING_MANUFACTURER 1
390#define STRING_PRODUCT 2
391#define STRING_ETHADDR 3
392#define STRING_DATA 4
393#define STRING_CONTROL 5
394#define STRING_RNDIS_CONTROL 6
395#define STRING_CDC 7
396#define STRING_SUBSET 8
397#define STRING_RNDIS 9
398
340600ab
DB		 399/* holds our biggest descriptor (or RNDIS response) */
400#define USB_BUFSIZ 256
1da177e4
LT		 401
402/*
403 * This device advertises one configuration, eth_config, unless RNDIS
404 * is enabled (rndis_config) on hardware supporting at least two configs.
405 *
406 * NOTE: Controllers like superh_udc should probably be able to use
407 * an RNDIS-only configuration.
408 *
409 * FIXME define some higher-powered configurations to make it easier
410 * to recharge batteries ...
411 */
412
413#define DEV_CONFIG_VALUE 1 /* cdc or subset */
414#define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */
415
416static struct usb_device_descriptor
417device_desc = {
418 .bLength = sizeof device_desc,
419 .bDescriptorType = USB_DT_DEVICE,
420
421 .bcdUSB = __constant_cpu_to_le16 (0x0200),
422
423 .bDeviceClass = USB_CLASS_COMM,
424 .bDeviceSubClass = 0,
425 .bDeviceProtocol = 0,
426
427 .idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM),
428 .idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM),
429 .iManufacturer = STRING_MANUFACTURER,
430 .iProduct = STRING_PRODUCT,
431 .bNumConfigurations = 1,
432};
433
434static struct usb_otg_descriptor
435otg_descriptor = {
436 .bLength = sizeof otg_descriptor,
437 .bDescriptorType = USB_DT_OTG,
438
439 .bmAttributes = USB_OTG_SRP,
440};
441
442static struct usb_config_descriptor
443eth_config = {
444 .bLength = sizeof eth_config,
445 .bDescriptorType = USB_DT_CONFIG,
446
447 /* compute wTotalLength on the fly */
448 .bNumInterfaces = 2,
449 .bConfigurationValue = DEV_CONFIG_VALUE,
450 .iConfiguration = STRING_CDC,
451 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
452 .bMaxPower = 50,
453};
454
455#ifdef CONFIG_USB_ETH_RNDIS
456static struct usb_config_descriptor
457rndis_config = {
458 .bLength = sizeof rndis_config,
459 .bDescriptorType = USB_DT_CONFIG,
460
461 /* compute wTotalLength on the fly */
462 .bNumInterfaces = 2,
463 .bConfigurationValue = DEV_RNDIS_CONFIG_VALUE,
464 .iConfiguration = STRING_RNDIS,
465 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
466 .bMaxPower = 50,
467};
468#endif
469
470/*
471 * Compared to the simple CDC subset, the full CDC Ethernet model adds
472 * three class descriptors, two interface descriptors, optional status
473 * endpoint. Both have a "data" interface and two bulk endpoints.
474 * There are also differences in how control requests are handled.
475 *
476 * RNDIS shares a lot with CDC-Ethernet, since it's a variant of
477 * the CDC-ACM (modem) spec.
478 */
479
480#ifdef DEV_CONFIG_CDC
481static struct usb_interface_descriptor
482control_intf = {
483 .bLength = sizeof control_intf,
484 .bDescriptorType = USB_DT_INTERFACE,
485
486 .bInterfaceNumber = 0,
487 /* status endpoint is optional; this may be patched later */
488 .bNumEndpoints = 1,
489 .bInterfaceClass = USB_CLASS_COMM,
490 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
491 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
492 .iInterface = STRING_CONTROL,
493};
494#endif
495
496#ifdef CONFIG_USB_ETH_RNDIS
497static const struct usb_interface_descriptor
498rndis_control_intf = {
499 .bLength = sizeof rndis_control_intf,
500 .bDescriptorType = USB_DT_INTERFACE,
501
502 .bInterfaceNumber = 0,
503 .bNumEndpoints = 1,
504 .bInterfaceClass = USB_CLASS_COMM,
505 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
506 .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
507 .iInterface = STRING_RNDIS_CONTROL,
508};
509#endif
510
511#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
512
513static const struct usb_cdc_header_desc header_desc = {
514 .bLength = sizeof header_desc,
515 .bDescriptorType = USB_DT_CS_INTERFACE,
516 .bDescriptorSubType = USB_CDC_HEADER_TYPE,
517
518 .bcdCDC = __constant_cpu_to_le16 (0x0110),
519};
520
521static const struct usb_cdc_union_desc union_desc = {
522 .bLength = sizeof union_desc,
523 .bDescriptorType = USB_DT_CS_INTERFACE,
524 .bDescriptorSubType = USB_CDC_UNION_TYPE,
525
526 .bMasterInterface0 = 0, /* index of control interface */
527 .bSlaveInterface0 = 1, /* index of DATA interface */
528};
529
530#endif /* CDC || RNDIS */
531
532#ifdef CONFIG_USB_ETH_RNDIS
533
534static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
535 .bLength = sizeof call_mgmt_descriptor,
536 .bDescriptorType = USB_DT_CS_INTERFACE,
537 .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
538
539 .bmCapabilities = 0x00,
540 .bDataInterface = 0x01,
541};
542
907cba35 543static const struct usb_cdc_acm_descriptor acm_descriptor = {
1da177e4
LT		 544 .bLength = sizeof acm_descriptor,
545 .bDescriptorType = USB_DT_CS_INTERFACE,
546 .bDescriptorSubType = USB_CDC_ACM_TYPE,
547
548 .bmCapabilities = 0x00,
549};
550
551#endif
552
553#ifdef DEV_CONFIG_CDC
554
555static const struct usb_cdc_ether_desc ether_desc = {
556 .bLength = sizeof ether_desc,
557 .bDescriptorType = USB_DT_CS_INTERFACE,
558 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
559
560 /* this descriptor actually adds value, surprise! */
561 .iMACAddress = STRING_ETHADDR,
562 .bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */
563 .wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN),
564 .wNumberMCFilters = __constant_cpu_to_le16 (0),
565 .bNumberPowerFilters = 0,
566};
567
568#endif
569
570#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
571
572/* include the status endpoint if we can, even where it's optional.
573 * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
093cf723 574 * packet, to simplify cancellation; and a big transfer interval, to
1da177e4
LT		 575 * waste less bandwidth.
576 *
577 * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
578 * if they ignore the connect/disconnect notifications that real aether
579 * can provide. more advanced cdc configurations might want to support
580 * encapsulated commands (vendor-specific, using control-OUT).
581 *
582 * RNDIS requires the status endpoint, since it uses that encapsulation
583 * mechanism for its funky RPC scheme.
584 */
585
586#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
587#define STATUS_BYTECOUNT 16 /* 8 byte header + data */
588
589static struct usb_endpoint_descriptor
590fs_status_desc = {
591 .bLength = USB_DT_ENDPOINT_SIZE,
592 .bDescriptorType = USB_DT_ENDPOINT,
593
594 .bEndpointAddress = USB_DIR_IN,
595 .bmAttributes = USB_ENDPOINT_XFER_INT,
596 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
597 .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
598};
599#endif
600
601#ifdef DEV_CONFIG_CDC
602
603/* the default data interface has no endpoints ... */
604
605static const struct usb_interface_descriptor
606data_nop_intf = {
607 .bLength = sizeof data_nop_intf,
608 .bDescriptorType = USB_DT_INTERFACE,
609
610 .bInterfaceNumber = 1,
611 .bAlternateSetting = 0,
612 .bNumEndpoints = 0,
613 .bInterfaceClass = USB_CLASS_CDC_DATA,
614 .bInterfaceSubClass = 0,
615 .bInterfaceProtocol = 0,
616};
617
618/* ... but the "real" data interface has two bulk endpoints */
619
620static const struct usb_interface_descriptor
621data_intf = {
622 .bLength = sizeof data_intf,
623 .bDescriptorType = USB_DT_INTERFACE,
624
625 .bInterfaceNumber = 1,
626 .bAlternateSetting = 1,
627 .bNumEndpoints = 2,
628 .bInterfaceClass = USB_CLASS_CDC_DATA,
629 .bInterfaceSubClass = 0,
630 .bInterfaceProtocol = 0,
631 .iInterface = STRING_DATA,
632};
633
634#endif
635
636#ifdef CONFIG_USB_ETH_RNDIS
637
638/* RNDIS doesn't activate by changing to the "real" altsetting */
639
640static const struct usb_interface_descriptor
641rndis_data_intf = {
642 .bLength = sizeof rndis_data_intf,
643 .bDescriptorType = USB_DT_INTERFACE,
644
645 .bInterfaceNumber = 1,
646 .bAlternateSetting = 0,
647 .bNumEndpoints = 2,
648 .bInterfaceClass = USB_CLASS_CDC_DATA,
649 .bInterfaceSubClass = 0,
650 .bInterfaceProtocol = 0,
651 .iInterface = STRING_DATA,
652};
653
654#endif
655
656#ifdef DEV_CONFIG_SUBSET
657
658/*
659 * "Simple" CDC-subset option is a simple vendor-neutral model that most
660 * full speed controllers can handle: one interface, two bulk endpoints.
661 */
662
663static const struct usb_interface_descriptor
664subset_data_intf = {
665 .bLength = sizeof subset_data_intf,
666 .bDescriptorType = USB_DT_INTERFACE,
667
668 .bInterfaceNumber = 0,
669 .bAlternateSetting = 0,
670 .bNumEndpoints = 2,
671 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
672 .bInterfaceSubClass = 0,
673 .bInterfaceProtocol = 0,
674 .iInterface = STRING_DATA,
675};
676
677#endif /* SUBSET */
678
679
680static struct usb_endpoint_descriptor
681fs_source_desc = {
682 .bLength = USB_DT_ENDPOINT_SIZE,
683 .bDescriptorType = USB_DT_ENDPOINT,
684
685 .bEndpointAddress = USB_DIR_IN,
686 .bmAttributes = USB_ENDPOINT_XFER_BULK,
687};
688
689static struct usb_endpoint_descriptor
690fs_sink_desc = {
691 .bLength = USB_DT_ENDPOINT_SIZE,
692 .bDescriptorType = USB_DT_ENDPOINT,
693
694 .bEndpointAddress = USB_DIR_OUT,
695 .bmAttributes = USB_ENDPOINT_XFER_BULK,
696};
697
698static const struct usb_descriptor_header *fs_eth_function [11] = {
699 (struct usb_descriptor_header *) &otg_descriptor,
700#ifdef DEV_CONFIG_CDC
701 /* "cdc" mode descriptors */
702 (struct usb_descriptor_header *) &control_intf,
703 (struct usb_descriptor_header *) &header_desc,
704 (struct usb_descriptor_header *) &union_desc,
705 (struct usb_descriptor_header *) &ether_desc,
706 /* NOTE: status endpoint may need to be removed */
707 (struct usb_descriptor_header *) &fs_status_desc,
708 /* data interface, with altsetting */
709 (struct usb_descriptor_header *) &data_nop_intf,
710 (struct usb_descriptor_header *) &data_intf,
711 (struct usb_descriptor_header *) &fs_source_desc,
712 (struct usb_descriptor_header *) &fs_sink_desc,
713 NULL,
714#endif /* DEV_CONFIG_CDC */
715};
716
717static inline void __init fs_subset_descriptors(void)
718{
719#ifdef DEV_CONFIG_SUBSET
720 fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
721 fs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
722 fs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
723 fs_eth_function[4] = NULL;
724#else
725 fs_eth_function[1] = NULL;
726#endif
727}
728
729#ifdef CONFIG_USB_ETH_RNDIS
730static const struct usb_descriptor_header *fs_rndis_function [] = {
731 (struct usb_descriptor_header *) &otg_descriptor,
732 /* control interface matches ACM, not Ethernet */
733 (struct usb_descriptor_header *) &rndis_control_intf,
734 (struct usb_descriptor_header *) &header_desc,
735 (struct usb_descriptor_header *) &call_mgmt_descriptor,
736 (struct usb_descriptor_header *) &acm_descriptor,
737 (struct usb_descriptor_header *) &union_desc,
738 (struct usb_descriptor_header *) &fs_status_desc,
739 /* data interface has no altsetting */
740 (struct usb_descriptor_header *) &rndis_data_intf,
741 (struct usb_descriptor_header *) &fs_source_desc,
742 (struct usb_descriptor_header *) &fs_sink_desc,
743 NULL,
744};
745#endif
746
747#ifdef CONFIG_USB_GADGET_DUALSPEED
748
749/*
750 * usb 2.0 devices need to expose both high speed and full speed
751 * descriptors, unless they only run at full speed.
752 */
753
754#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
755static struct usb_endpoint_descriptor
756hs_status_desc = {
757 .bLength = USB_DT_ENDPOINT_SIZE,
758 .bDescriptorType = USB_DT_ENDPOINT,
759
760 .bmAttributes = USB_ENDPOINT_XFER_INT,
761 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
762 .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
763};
764#endif /* DEV_CONFIG_CDC */
765
766static struct usb_endpoint_descriptor
767hs_source_desc = {
768 .bLength = USB_DT_ENDPOINT_SIZE,
769 .bDescriptorType = USB_DT_ENDPOINT,
770
771 .bmAttributes = USB_ENDPOINT_XFER_BULK,
772 .wMaxPacketSize = __constant_cpu_to_le16 (512),
773};
774
775static struct usb_endpoint_descriptor
776hs_sink_desc = {
777 .bLength = USB_DT_ENDPOINT_SIZE,
778 .bDescriptorType = USB_DT_ENDPOINT,
779
780 .bmAttributes = USB_ENDPOINT_XFER_BULK,
781 .wMaxPacketSize = __constant_cpu_to_le16 (512),
782};
783
784static struct usb_qualifier_descriptor
785dev_qualifier = {
786 .bLength = sizeof dev_qualifier,
787 .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
788
789 .bcdUSB = __constant_cpu_to_le16 (0x0200),
790 .bDeviceClass = USB_CLASS_COMM,
791
792 .bNumConfigurations = 1,
793};
794
795static const struct usb_descriptor_header *hs_eth_function [11] = {
796 (struct usb_descriptor_header *) &otg_descriptor,
797#ifdef DEV_CONFIG_CDC
798 /* "cdc" mode descriptors */
799 (struct usb_descriptor_header *) &control_intf,
800 (struct usb_descriptor_header *) &header_desc,
801 (struct usb_descriptor_header *) &union_desc,
802 (struct usb_descriptor_header *) &ether_desc,
803 /* NOTE: status endpoint may need to be removed */
804 (struct usb_descriptor_header *) &hs_status_desc,
805 /* data interface, with altsetting */
806 (struct usb_descriptor_header *) &data_nop_intf,
807 (struct usb_descriptor_header *) &data_intf,
808 (struct usb_descriptor_header *) &hs_source_desc,
809 (struct usb_descriptor_header *) &hs_sink_desc,
810 NULL,
811#endif /* DEV_CONFIG_CDC */
812};
813
814static inline void __init hs_subset_descriptors(void)
815{
816#ifdef DEV_CONFIG_SUBSET
817 hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
818 hs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
819 hs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
820 hs_eth_function[4] = NULL;
821#else
822 hs_eth_function[1] = NULL;
823#endif
824}
825
826#ifdef CONFIG_USB_ETH_RNDIS
827static const struct usb_descriptor_header *hs_rndis_function [] = {
828 (struct usb_descriptor_header *) &otg_descriptor,
829 /* control interface matches ACM, not Ethernet */
830 (struct usb_descriptor_header *) &rndis_control_intf,
831 (struct usb_descriptor_header *) &header_desc,
832 (struct usb_descriptor_header *) &call_mgmt_descriptor,
833 (struct usb_descriptor_header *) &acm_descriptor,
834 (struct usb_descriptor_header *) &union_desc,
835 (struct usb_descriptor_header *) &hs_status_desc,
836 /* data interface has no altsetting */
837 (struct usb_descriptor_header *) &rndis_data_intf,
838 (struct usb_descriptor_header *) &hs_source_desc,
839 (struct usb_descriptor_header *) &hs_sink_desc,
840 NULL,
841};
842#endif
843
844
845/* maxpacket and other transfer characteristics vary by speed. */
846#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
847
848#else
849
850/* if there's no high speed support, maxpacket doesn't change. */
907cba35 851#define ep_desc(g,hs,fs) (((void)(g)), (fs))
1da177e4
LT		 852
853static inline void __init hs_subset_descriptors(void)
854{
855}
856
857#endif /* !CONFIG_USB_GADGET_DUALSPEED */
858
859/*-------------------------------------------------------------------------*/
860
861/* descriptors that are built on-demand */
862
863static char manufacturer [50];
864static char product_desc [40] = DRIVER_DESC;
865
866#ifdef DEV_CONFIG_CDC
867/* address that the host will use ... usually assigned at random */
868static char ethaddr [2 * ETH_ALEN + 1];
869#endif
870
871/* static strings, in UTF-8 */
872static struct usb_string strings [] = {
873 { STRING_MANUFACTURER, manufacturer, },
874 { STRING_PRODUCT, product_desc, },
875 { STRING_DATA, "Ethernet Data", },
876#ifdef DEV_CONFIG_CDC
877 { STRING_CDC, "CDC Ethernet", },
878 { STRING_ETHADDR, ethaddr, },
879 { STRING_CONTROL, "CDC Communications Control", },
880#endif
881#ifdef DEV_CONFIG_SUBSET
882 { STRING_SUBSET, "CDC Ethernet Subset", },
883#endif
884#ifdef CONFIG_USB_ETH_RNDIS
885 { STRING_RNDIS, "RNDIS", },
886 { STRING_RNDIS_CONTROL, "RNDIS Communications Control", },
887#endif
888 { } /* end of list */
889};
890
891static struct usb_gadget_strings stringtab = {
892 .language = 0x0409, /* en-us */
893 .strings = strings,
894};
895
896/*
897 * one config, two interfaces: control, data.
898 * complications: class descriptors, and an altsetting.
899 */
900static int
901config_buf (enum usb_device_speed speed,
902 u8 *buf, u8 type,
903 unsigned index, int is_otg)
904{
905 int len;
906 const struct usb_config_descriptor *config;
907 const struct usb_descriptor_header **function;
908#ifdef CONFIG_USB_GADGET_DUALSPEED
909 int hs = (speed == USB_SPEED_HIGH);
910
911 if (type == USB_DT_OTHER_SPEED_CONFIG)
912 hs = !hs;
913#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
914#else
915#define which_fn(t) (fs_ ## t ## _function)
916#endif
917
918 if (index >= device_desc.bNumConfigurations)
919 return -EINVAL;
920
921#ifdef CONFIG_USB_ETH_RNDIS
922 /* list the RNDIS config first, to make Microsoft's drivers
923 * happy. DOCSIS 1.0 needs this too.
924 */
925 if (device_desc.bNumConfigurations == 2 && index == 0) {
926 config = &rndis_config;
927 function = which_fn (rndis);
928 } else
929#endif
930 {
931 config = &eth_config;
932 function = which_fn (eth);
933 }
934
935 /* for now, don't advertise srp-only devices */
936 if (!is_otg)
937 function++;
938
939 len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function);
940 if (len < 0)
941 return len;
942 ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
943 return len;
944}
945
946/*-------------------------------------------------------------------------*/
947
55016f10
AV		 948static void eth_start (struct eth_dev *dev, gfp_t gfp_flags);
949static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags);
1da177e4 950
907cba35 951static int
55016f10 952set_ether_config (struct eth_dev *dev, gfp_t gfp_flags)
1da177e4 953{
907cba35
DB		 954 int result = 0;
955 struct usb_gadget *gadget = dev->gadget;
956
e828264e 957#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
907cba35
DB		 958 /* status endpoint used for RNDIS and (optionally) CDC */
959 if (!subset_active(dev) && dev->status_ep) {
960 dev->status = ep_desc (gadget, &hs_status_desc,
961 &fs_status_desc);
962 dev->status_ep->driver_data = dev;
963
964 result = usb_ep_enable (dev->status_ep, dev->status);
965 if (result != 0) {
966 DEBUG (dev, "enable %s --> %d\n",
967 dev->status_ep->name, result);
968 goto done;
969 }
970 }
e828264e 971#endif
907cba35
DB		 972
973 dev->in = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc);
974 dev->in_ep->driver_data = dev;
975
976 dev->out = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc);
977 dev->out_ep->driver_data = dev;
1da177e4
LT		 978
979 /* With CDC, the host isn't allowed to use these two data
980 * endpoints in the default altsetting for the interface.
981 * so we don't activate them yet. Reset from SET_INTERFACE.
982 *
983 * Strictly speaking RNDIS should work the same: activation is
984 * a side effect of setting a packet filter. Deactivation is
985 * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG.
986 */
907cba35
DB		 987 if (!cdc_active(dev)) {
988 result = usb_ep_enable (dev->in_ep, dev->in);
989 if (result != 0) {
990 DEBUG(dev, "enable %s --> %d\n",
991 dev->in_ep->name, result);
992 goto done;
1da177e4 993 }
1da177e4 994
907cba35
DB		 995 result = usb_ep_enable (dev->out_ep, dev->out);
996 if (result != 0) {
997 DEBUG (dev, "enable %s --> %d\n",
998 dev->in_ep->name, result);
999 goto done;
1da177e4 1000 }
1da177e4 1001 }
1da177e4 1002
907cba35 1003done:
1da177e4
LT		 1004 if (result == 0)
1005 result = alloc_requests (dev, qlen (gadget), gfp_flags);
1006
1007 /* on error, disable any endpoints */
1008 if (result < 0) {
907cba35 1009 if (!subset_active(dev))
1da177e4 1010 (void) usb_ep_disable (dev->status_ep);
1da177e4 1011 dev->status = NULL;
907cba35
DB		 1012 (void) usb_ep_disable (dev->in_ep);
1013 (void) usb_ep_disable (dev->out_ep);
1da177e4
LT		 1014 dev->in = NULL;
1015 dev->out = NULL;
1016 } else
1017
1018 /* activate non-CDC configs right away
1019 * this isn't strictly according to the RNDIS spec
1020 */
907cba35 1021 if (!cdc_active (dev)) {
1da177e4
LT		 1022 netif_carrier_on (dev->net);
1023 if (netif_running (dev->net)) {
1024 spin_unlock (&dev->lock);
1025 eth_start (dev, GFP_ATOMIC);
1026 spin_lock (&dev->lock);
1027 }
1028 }
1da177e4
LT		 1029
1030 if (result == 0)
1031 DEBUG (dev, "qlen %d\n", qlen (gadget));
1032
1033 /* caller is responsible for cleanup on error */
1034 return result;
1035}
1036
1037static void eth_reset_config (struct eth_dev *dev)
1038{
1039 struct usb_request *req;
1040
1041 if (dev->config == 0)
1042 return;
1043
1044 DEBUG (dev, "%s\n", __FUNCTION__);
1045
1046 netif_stop_queue (dev->net);
1047 netif_carrier_off (dev->net);
340600ab 1048 rndis_uninit(dev->rndis_config);
1da177e4
LT		 1049
1050 /* disable endpoints, forcing (synchronous) completion of
1051 * pending i/o. then free the requests.
1052 */
1053 if (dev->in) {
1054 usb_ep_disable (dev->in_ep);
1055 while (likely (!list_empty (&dev->tx_reqs))) {
1056 req = container_of (dev->tx_reqs.next,
1057 struct usb_request, list);
1058 list_del (&req->list);
1059 usb_ep_free_request (dev->in_ep, req);
1060 }
1061 }
1062 if (dev->out) {
1063 usb_ep_disable (dev->out_ep);
1064 while (likely (!list_empty (&dev->rx_reqs))) {
1065 req = container_of (dev->rx_reqs.next,
1066 struct usb_request, list);
1067 list_del (&req->list);
1068 usb_ep_free_request (dev->out_ep, req);
1069 }
1070 }
1071
1072 if (dev->status) {
1073 usb_ep_disable (dev->status_ep);
1074 }
907cba35
DB		 1075 dev->rndis = 0;
1076 dev->cdc_filter = 0;
1da177e4
LT		 1077 dev->config = 0;
1078}
1079
1080/* change our operational config. must agree with the code
1081 * that returns config descriptors, and altsetting code.
1082 */
1083static int
55016f10 1084eth_set_config (struct eth_dev *dev, unsigned number, gfp_t gfp_flags)
1da177e4
LT		 1085{
1086 int result = 0;
1087 struct usb_gadget *gadget = dev->gadget;
1088
1da177e4
LT		 1089 if (gadget_is_sa1100 (gadget)
1090 && dev->config
1091 && atomic_read (&dev->tx_qlen) != 0) {
1092 /* tx fifo is full, but we can't clear it...*/
1093 INFO (dev, "can't change configurations\n");
1094 return -ESPIPE;
1095 }
1096 eth_reset_config (dev);
1097
1da177e4
LT		 1098 switch (number) {
1099 case DEV_CONFIG_VALUE:
1da177e4
LT		 1100 result = set_ether_config (dev, gfp_flags);
1101 break;
1102#ifdef CONFIG_USB_ETH_RNDIS
1103 case DEV_RNDIS_CONFIG_VALUE:
1104 dev->rndis = 1;
1105 result = set_ether_config (dev, gfp_flags);
1106 break;
1107#endif
1108 default:
1109 result = -EINVAL;
1110 /* FALL THROUGH */
1111 case 0:
1112 break;
1113 }
1114
1115 if (result) {
1116 if (number)
1117 eth_reset_config (dev);
1118 usb_gadget_vbus_draw(dev->gadget,
1119 dev->gadget->is_otg ? 8 : 100);
1120 } else {
1121 char *speed;
1122 unsigned power;
1123
1124 power = 2 * eth_config.bMaxPower;
1125 usb_gadget_vbus_draw(dev->gadget, power);
1126
1127 switch (gadget->speed) {
1128 case USB_SPEED_FULL: speed = "full"; break;
1129#ifdef CONFIG_USB_GADGET_DUALSPEED
1130 case USB_SPEED_HIGH: speed = "high"; break;
1131#endif
1132 default: speed = "?"; break;
1133 }
1134
1135 dev->config = number;
1136 INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n",
1137 speed, number, power, driver_desc,
45e45ab4 1138 rndis_active(dev)
1da177e4 1139 ? "RNDIS"
45e45ab4 1140 : (cdc_active(dev)
1da177e4
LT		 1141 ? "CDC Ethernet"
1142 : "CDC Ethernet Subset"));
1143 }
1144 return result;
1145}
1146
1147/*-------------------------------------------------------------------------*/
1148
1149#ifdef DEV_CONFIG_CDC
1150
907cba35
DB		 1151/* The interrupt endpoint is used in CDC networking models (Ethernet, ATM)
1152 * only to notify the host about link status changes (which we support) or
1153 * report completion of some encapsulated command (as used in RNDIS). Since
1154 * we want this CDC Ethernet code to be vendor-neutral, we don't use that
1155 * command mechanism; and only one status request is ever queued.
1156 */
1157
1da177e4
LT		 1158static void eth_status_complete (struct usb_ep *ep, struct usb_request *req)
1159{
1160 struct usb_cdc_notification *event = req->buf;
1161 int value = req->status;
1162 struct eth_dev *dev = ep->driver_data;
1163
1164 /* issue the second notification if host reads the first */
1165 if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION
1166 && value == 0) {
1167 __le32 *data = req->buf + sizeof *event;
1168
1169 event->bmRequestType = 0xA1;
1170 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
1171 event->wValue = __constant_cpu_to_le16 (0);
1172 event->wIndex = __constant_cpu_to_le16 (1);
1173 event->wLength = __constant_cpu_to_le16 (8);
1174
1175 /* SPEED_CHANGE data is up/down speeds in bits/sec */
1176 data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget));
1177
1178 req->length = STATUS_BYTECOUNT;
1179 value = usb_ep_queue (ep, req, GFP_ATOMIC);
1180 DEBUG (dev, "send SPEED_CHANGE --> %d\n", value);
1181 if (value == 0)
1182 return;
1183 } else if (value != -ECONNRESET)
1184 DEBUG (dev, "event %02x --> %d\n",
1185 event->bNotificationType, value);
907cba35 1186 req->context = NULL;
1da177e4
LT		 1187}
1188
1189static void issue_start_status (struct eth_dev *dev)
1190{
1191 struct usb_request *req = dev->stat_req;
1192 struct usb_cdc_notification *event;
1193 int value;
1194
1195 DEBUG (dev, "%s, flush old status first\n", __FUNCTION__);
1196
1197 /* flush old status
1198 *
1199 * FIXME ugly idiom, maybe we'd be better with just
1200 * a "cancel the whole queue" primitive since any
1201 * unlink-one primitive has way too many error modes.
1202 * here, we "know" toggle is already clear...
907cba35
DB		 1203 *
1204 * FIXME iff req->context != null just dequeue it
1da177e4
LT		 1205 */
1206 usb_ep_disable (dev->status_ep);
1207 usb_ep_enable (dev->status_ep, dev->status);
1208
1209 /* 3.8.1 says to issue first NETWORK_CONNECTION, then
1210 * a SPEED_CHANGE. could be useful in some configs.
1211 */
1212 event = req->buf;
1213 event->bmRequestType = 0xA1;
1214 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
1215 event->wValue = __constant_cpu_to_le16 (1); /* connected */
1216 event->wIndex = __constant_cpu_to_le16 (1);
1217 event->wLength = 0;
1218
1219 req->length = sizeof *event;
1220 req->complete = eth_status_complete;
907cba35
DB		 1221 req->context = dev;
1222
1da177e4
LT		 1223 value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC);
1224 if (value < 0)
1225 DEBUG (dev, "status buf queue --> %d\n", value);
1226}
1227
1228#endif
1229
1230/*-------------------------------------------------------------------------*/
1231
1232static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req)
1233{
1234 if (req->status || req->actual != req->length)
1235 DEBUG ((struct eth_dev *) ep->driver_data,
1236 "setup complete --> %d, %d/%d\n",
1237 req->status, req->actual, req->length);
1238}
1239
1240#ifdef CONFIG_USB_ETH_RNDIS
1241
1242static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req)
1243{
1244 if (req->status || req->actual != req->length)
1245 DEBUG ((struct eth_dev *) ep->driver_data,
1246 "rndis response complete --> %d, %d/%d\n",
1247 req->status, req->actual, req->length);
1248
1249 /* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */
1250}
1251
1252static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req)
1253{
1254 struct eth_dev *dev = ep->driver_data;
1255 int status;
1256
1257 /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
1258 spin_lock(&dev->lock);
1259 status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf);
1260 if (status < 0)
1261 ERROR(dev, "%s: rndis parse error %d\n", __FUNCTION__, status);
1262 spin_unlock(&dev->lock);
1263}
1264
1265#endif /* RNDIS */
1266
1267/*
1268 * The setup() callback implements all the ep0 functionality that's not
1269 * handled lower down. CDC has a number of less-common features:
1270 *
1271 * - two interfaces: control, and ethernet data
1272 * - Ethernet data interface has two altsettings: default, and active
1273 * - class-specific descriptors for the control interface
1274 * - class-specific control requests
1275 */
1276static int
1277eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
1278{
1279 struct eth_dev *dev = get_gadget_data (gadget);
1280 struct usb_request *req = dev->req;
1281 int value = -EOPNOTSUPP;
1bbc1696
DB		 1282 u16 wIndex = le16_to_cpu(ctrl->wIndex);
1283 u16 wValue = le16_to_cpu(ctrl->wValue);
1284 u16 wLength = le16_to_cpu(ctrl->wLength);
1da177e4
LT		 1285
1286 /* descriptors just go into the pre-allocated ep0 buffer,
1287 * while config change events may enable network traffic.
1288 */
1289 req->complete = eth_setup_complete;
1290 switch (ctrl->bRequest) {
1291
1292 case USB_REQ_GET_DESCRIPTOR:
1293 if (ctrl->bRequestType != USB_DIR_IN)
1294 break;
1295 switch (wValue >> 8) {
1296
1297 case USB_DT_DEVICE:
1298 value = min (wLength, (u16) sizeof device_desc);
1299 memcpy (req->buf, &device_desc, value);
1300 break;
1301#ifdef CONFIG_USB_GADGET_DUALSPEED
1302 case USB_DT_DEVICE_QUALIFIER:
1303 if (!gadget->is_dualspeed)
1304 break;
1305 value = min (wLength, (u16) sizeof dev_qualifier);
1306 memcpy (req->buf, &dev_qualifier, value);
1307 break;
1308
1309 case USB_DT_OTHER_SPEED_CONFIG:
1310 if (!gadget->is_dualspeed)
1311 break;
1312 // FALLTHROUGH
1313#endif /* CONFIG_USB_GADGET_DUALSPEED */
1314 case USB_DT_CONFIG:
1315 value = config_buf (gadget->speed, req->buf,
1316 wValue >> 8,
1317 wValue & 0xff,
1318 gadget->is_otg);
1319 if (value >= 0)
1320 value = min (wLength, (u16) value);
1321 break;
1322
1323 case USB_DT_STRING:
1324 value = usb_gadget_get_string (&stringtab,
1325 wValue & 0xff, req->buf);
1326 if (value >= 0)
1327 value = min (wLength, (u16) value);
1328 break;
1329 }
1330 break;
1331
1332 case USB_REQ_SET_CONFIGURATION:
1333 if (ctrl->bRequestType != 0)
1334 break;
1335 if (gadget->a_hnp_support)
1336 DEBUG (dev, "HNP available\n");
1337 else if (gadget->a_alt_hnp_support)
1338 DEBUG (dev, "HNP needs a different root port\n");
1339 spin_lock (&dev->lock);
1340 value = eth_set_config (dev, wValue, GFP_ATOMIC);
1341 spin_unlock (&dev->lock);
1342 break;
1343 case USB_REQ_GET_CONFIGURATION:
1344 if (ctrl->bRequestType != USB_DIR_IN)
1345 break;
1346 *(u8 *)req->buf = dev->config;
1347 value = min (wLength, (u16) 1);
1348 break;
1349
1350 case USB_REQ_SET_INTERFACE:
1351 if (ctrl->bRequestType != USB_RECIP_INTERFACE
1352 || !dev->config
1353 || wIndex > 1)
1354 break;
45e45ab4 1355 if (!cdc_active(dev) && wIndex != 0)
1da177e4
LT		 1356 break;
1357 spin_lock (&dev->lock);
1358
1359 /* PXA hardware partially handles SET_INTERFACE;
1360 * we need to kluge around that interference.
1361 */
1362 if (gadget_is_pxa (gadget)) {
1363 value = eth_set_config (dev, DEV_CONFIG_VALUE,
1364 GFP_ATOMIC);
1365 goto done_set_intf;
1366 }
1367
1368#ifdef DEV_CONFIG_CDC
1369 switch (wIndex) {
1370 case 0: /* control/master intf */
1371 if (wValue != 0)
1372 break;
1373 if (dev->status) {
1374 usb_ep_disable (dev->status_ep);
1375 usb_ep_enable (dev->status_ep, dev->status);
1376 }
1377 value = 0;
1378 break;
1379 case 1: /* data intf */
1380 if (wValue > 1)
1381 break;
1382 usb_ep_disable (dev->in_ep);
1383 usb_ep_disable (dev->out_ep);
1384
1385 /* CDC requires the data transfers not be done from
1386 * the default interface setting ... also, setting
907cba35 1387 * the non-default interface resets filters etc.
1da177e4
LT		 1388 */
1389 if (wValue == 1) {
907cba35
DB		 1390 if (!cdc_active (dev))
1391 break;
1da177e4
LT		 1392 usb_ep_enable (dev->in_ep, dev->in);
1393 usb_ep_enable (dev->out_ep, dev->out);
1394 dev->cdc_filter = DEFAULT_FILTER;
1395 netif_carrier_on (dev->net);
1396 if (dev->status)
1397 issue_start_status (dev);
1398 if (netif_running (dev->net)) {
1399 spin_unlock (&dev->lock);
1400 eth_start (dev, GFP_ATOMIC);
1401 spin_lock (&dev->lock);
1402 }
1403 } else {
1404 netif_stop_queue (dev->net);
1405 netif_carrier_off (dev->net);
1406 }
1407 value = 0;
1408 break;
1409 }
1410#else
1411 /* FIXME this is wrong, as is the assumption that
1412 * all non-PXA hardware talks real CDC ...
1413 */
1414 dev_warn (&gadget->dev, "set_interface ignored!\n");
1415#endif /* DEV_CONFIG_CDC */
1416
1417done_set_intf:
1418 spin_unlock (&dev->lock);
1419 break;
1420 case USB_REQ_GET_INTERFACE:
1421 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
1422 || !dev->config
1423 || wIndex > 1)
1424 break;
45e45ab4 1425 if (!(cdc_active(dev) || rndis_active(dev)) && wIndex != 0)
1da177e4
LT		 1426 break;
1427
1428 /* for CDC, iff carrier is on, data interface is active. */
45e45ab4 1429 if (rndis_active(dev) || wIndex != 1)
1da177e4
LT		 1430 *(u8 *)req->buf = 0;
1431 else
1432 *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0;
1433 value = min (wLength, (u16) 1);
1434 break;
1435
1436#ifdef DEV_CONFIG_CDC
1437 case USB_CDC_SET_ETHERNET_PACKET_FILTER:
1438 /* see 6.2.30: no data, wIndex = interface,
1439 * wValue = packet filter bitmap
1440 */
1441 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
45e45ab4 1442 || !cdc_active(dev)
1da177e4
LT		 1443 || wLength != 0
1444 || wIndex > 1)
1445 break;
1446 DEBUG (dev, "packet filter %02x\n", wValue);
1447 dev->cdc_filter = wValue;
1448 value = 0;
1449 break;
1450
1451 /* and potentially:
1452 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
1453 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
1454 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
1455 * case USB_CDC_GET_ETHERNET_STATISTIC:
1456 */
1457
1458#endif /* DEV_CONFIG_CDC */
1459
1460#ifdef CONFIG_USB_ETH_RNDIS
1461 /* RNDIS uses the CDC command encapsulation mechanism to implement
1462 * an RPC scheme, with much getting/setting of attributes by OID.
1463 */
1464 case USB_CDC_SEND_ENCAPSULATED_COMMAND:
1465 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
45e45ab4 1466 || !rndis_active(dev)
1da177e4
LT		 1467 || wLength > USB_BUFSIZ
1468 || wValue
1469 || rndis_control_intf.bInterfaceNumber
1470 != wIndex)
1471 break;
1472 /* read the request, then process it */
1473 value = wLength;
1474 req->complete = rndis_command_complete;
1475 /* later, rndis_control_ack () sends a notification */
1476 break;
1477
1478 case USB_CDC_GET_ENCAPSULATED_RESPONSE:
1479 if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1480 == ctrl->bRequestType
45e45ab4 1481 && rndis_active(dev)
1da177e4
LT		 1482 // && wLength >= 0x0400
1483 && !wValue
1484 && rndis_control_intf.bInterfaceNumber
1485 == wIndex) {
1486 u8 *buf;
1487
1488 /* return the result */
1489 buf = rndis_get_next_response (dev->rndis_config,
1490 &value);
1491 if (buf) {
1492 memcpy (req->buf, buf, value);
1493 req->complete = rndis_response_complete;
1494 rndis_free_response(dev->rndis_config, buf);
1495 }
1496 /* else stalls ... spec says to avoid that */
1497 }
1498 break;
1499#endif /* RNDIS */
1500
1501 default:
1502 VDEBUG (dev,
1503 "unknown control req%02x.%02x v%04x i%04x l%d\n",
1504 ctrl->bRequestType, ctrl->bRequest,
1505 wValue, wIndex, wLength);
1506 }
1507
1508 /* respond with data transfer before status phase? */
1509 if (value >= 0) {
1510 req->length = value;
1511 req->zero = value < wLength
1512 && (value % gadget->ep0->maxpacket) == 0;
1513 value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
1514 if (value < 0) {
1515 DEBUG (dev, "ep_queue --> %d\n", value);
1516 req->status = 0;
1517 eth_setup_complete (gadget->ep0, req);
1518 }
1519 }
1520
1521 /* host either stalls (value < 0) or reports success */
1522 return value;
1523}
1524
1525static void
1526eth_disconnect (struct usb_gadget *gadget)
1527{
1528 struct eth_dev *dev = get_gadget_data (gadget);
1529 unsigned long flags;
1530
1531 spin_lock_irqsave (&dev->lock, flags);
1532 netif_stop_queue (dev->net);
1533 netif_carrier_off (dev->net);
1534 eth_reset_config (dev);
1535 spin_unlock_irqrestore (&dev->lock, flags);
1536
1537 /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
1538
1539 /* next we may get setup() calls to enumerate new connections;
1540 * or an unbind() during shutdown (including removing module).
1541 */
1542}
1543
1544/*-------------------------------------------------------------------------*/
1545
1546/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
1547
1548static int eth_change_mtu (struct net_device *net, int new_mtu)
1549{
1550 struct eth_dev *dev = netdev_priv(net);
1551
7802ac5c
DB		 1552 if (dev->rndis)
1553 return -EBUSY;
1da177e4
LT		 1554
1555 if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
1556 return -ERANGE;
1557 /* no zero-length packet read wanted after mtu-sized packets */
1558 if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0)
1559 return -EDOM;
1560 net->mtu = new_mtu;
1561 return 0;
1562}
1563
1564static struct net_device_stats *eth_get_stats (struct net_device *net)
1565{
1566 return &((struct eth_dev *)netdev_priv(net))->stats;
1567}
1568
1569static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
1570{
1571 struct eth_dev *dev = netdev_priv(net);
1572 strlcpy(p->driver, shortname, sizeof p->driver);
1573 strlcpy(p->version, DRIVER_VERSION, sizeof p->version);
1574 strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version);
1575 strlcpy (p->bus_info, dev->gadget->dev.bus_id, sizeof p->bus_info);
1576}
1577
1578static u32 eth_get_link(struct net_device *net)
1579{
1580 struct eth_dev *dev = netdev_priv(net);
1581 return dev->gadget->speed != USB_SPEED_UNKNOWN;
1582}
1583
1584static struct ethtool_ops ops = {
1585 .get_drvinfo = eth_get_drvinfo,
1586 .get_link = eth_get_link
1587};
1588
1589static void defer_kevent (struct eth_dev *dev, int flag)
1590{
1591 if (test_and_set_bit (flag, &dev->todo))
1592 return;
1593 if (!schedule_work (&dev->work))
1594 ERROR (dev, "kevent %d may have been dropped\n", flag);
1595 else
1596 DEBUG (dev, "kevent %d scheduled\n", flag);
1597}
1598
1599static void rx_complete (struct usb_ep *ep, struct usb_request *req);
1600
1601static int
55016f10 1602rx_submit (struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
1da177e4
LT		 1603{
1604 struct sk_buff *skb;
1605 int retval = -ENOMEM;
1606 size_t size;
1607
1608 /* Padding up to RX_EXTRA handles minor disagreements with host.
1609 * Normally we use the USB "terminate on short read" convention;
1610 * so allow up to (N*maxpacket), since that memory is normally
1611 * already allocated. Some hardware doesn't deal well with short
1612 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
1613 * byte off the end (to force hardware errors on overflow).
1614 *
1615 * RNDIS uses internal framing, and explicitly allows senders to
1616 * pad to end-of-packet. That's potentially nice for speed,
1617 * but means receivers can't recover synch on their own.
1618 */
1619 size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA);
1620 size += dev->out_ep->maxpacket - 1;
907cba35 1621 if (rndis_active(dev))
1da177e4 1622 size += sizeof (struct rndis_packet_msg_type);
1da177e4
LT		 1623 size -= size % dev->out_ep->maxpacket;
1624
1625 if ((skb = alloc_skb (size + NET_IP_ALIGN, gfp_flags)) == 0) {
1626 DEBUG (dev, "no rx skb\n");
1627 goto enomem;
1628 }
1629
1630 /* Some platforms perform better when IP packets are aligned,
1631 * but on at least one, checksumming fails otherwise. Note:
6cdee106 1632 * RNDIS headers involve variable numbers of LE32 values.
1da177e4
LT		 1633 */
1634 skb_reserve(skb, NET_IP_ALIGN);
1635
1636 req->buf = skb->data;
1637 req->length = size;
1638 req->complete = rx_complete;
1639 req->context = skb;
1640
1641 retval = usb_ep_queue (dev->out_ep, req, gfp_flags);
1642 if (retval == -ENOMEM)
1643enomem:
1644 defer_kevent (dev, WORK_RX_MEMORY);
1645 if (retval) {
1646 DEBUG (dev, "rx submit --> %d\n", retval);
1647 dev_kfree_skb_any (skb);
1648 spin_lock (&dev->lock);
1649 list_add (&req->list, &dev->rx_reqs);
1650 spin_unlock (&dev->lock);
1651 }
1652 return retval;
1653}
1654
1655static void rx_complete (struct usb_ep *ep, struct usb_request *req)
1656{
1657 struct sk_buff *skb = req->context;
1658 struct eth_dev *dev = ep->driver_data;
1659 int status = req->status;
1660
1661 switch (status) {
1662
1663 /* normal completion */
1664 case 0:
1665 skb_put (skb, req->actual);
1da177e4 1666 /* we know MaxPacketsPerTransfer == 1 here */
45e45ab4 1667 if (rndis_active(dev))
6cdee106 1668 status = rndis_rm_hdr (skb);
6cdee106
DB		 1669 if (status < 0
1670 || ETH_HLEN > skb->len
1671 || skb->len > ETH_FRAME_LEN) {
1da177e4
LT		 1672 dev->stats.rx_errors++;
1673 dev->stats.rx_length_errors++;
1674 DEBUG (dev, "rx length %d\n", skb->len);
1675 break;
1676 }
1677
1678 skb->dev = dev->net;
1679 skb->protocol = eth_type_trans (skb, dev->net);
1680 dev->stats.rx_packets++;
1681 dev->stats.rx_bytes += skb->len;
1682
1683 /* no buffer copies needed, unless hardware can't
1684 * use skb buffers.
1685 */
1686 status = netif_rx (skb);
1687 skb = NULL;
1688 break;
1689
1690 /* software-driven interface shutdown */
1691 case -ECONNRESET: // unlink
1692 case -ESHUTDOWN: // disconnect etc
1693 VDEBUG (dev, "rx shutdown, code %d\n", status);
1694 goto quiesce;
1695
1696 /* for hardware automagic (such as pxa) */
1697 case -ECONNABORTED: // endpoint reset
1698 DEBUG (dev, "rx %s reset\n", ep->name);
1699 defer_kevent (dev, WORK_RX_MEMORY);
1700quiesce:
1701 dev_kfree_skb_any (skb);
1702 goto clean;
1703
1704 /* data overrun */
1705 case -EOVERFLOW:
1706 dev->stats.rx_over_errors++;
1707 // FALLTHROUGH
1708
1709 default:
1710 dev->stats.rx_errors++;
1711 DEBUG (dev, "rx status %d\n", status);
1712 break;
1713 }
1714
1715 if (skb)
1716 dev_kfree_skb_any (skb);
1717 if (!netif_running (dev->net)) {
1718clean:
1719 /* nobody reading rx_reqs, so no dev->lock */
1720 list_add (&req->list, &dev->rx_reqs);
1721 req = NULL;
1722 }
1723 if (req)
1724 rx_submit (dev, req, GFP_ATOMIC);
1725}
1726
1727static int prealloc (struct list_head *list, struct usb_ep *ep,
55016f10 1728 unsigned n, gfp_t gfp_flags)
1da177e4
LT		 1729{
1730 unsigned i;
1731 struct usb_request *req;
1732
1733 if (!n)
1734 return -ENOMEM;
1735
1736 /* queue/recycle up to N requests */
1737 i = n;
1738 list_for_each_entry (req, list, list) {
1739 if (i-- == 0)
1740 goto extra;
1741 }
1742 while (i--) {
1743 req = usb_ep_alloc_request (ep, gfp_flags);
1744 if (!req)
1745 return list_empty (list) ? -ENOMEM : 0;
1746 list_add (&req->list, list);
1747 }
1748 return 0;
1749
1750extra:
1751 /* free extras */
1752 for (;;) {
1753 struct list_head *next;
1754
1755 next = req->list.next;
1756 list_del (&req->list);
1757 usb_ep_free_request (ep, req);
1758
1759 if (next == list)
1760 break;
1761
1762 req = container_of (next, struct usb_request, list);
1763 }
1764 return 0;
1765}
1766
55016f10 1767static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags)
1da177e4
LT		 1768{
1769 int status;
1770
1771 status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags);
1772 if (status < 0)
1773 goto fail;
1774 status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags);
1775 if (status < 0)
1776 goto fail;
1777 return 0;
1778fail:
1779 DEBUG (dev, "can't alloc requests\n");
1780 return status;
1781}
1782
55016f10 1783static void rx_fill (struct eth_dev *dev, gfp_t gfp_flags)
1da177e4
LT		 1784{
1785 struct usb_request *req;
1786 unsigned long flags;
1787
1da177e4
LT		 1788 /* fill unused rxq slots with some skb */
1789 spin_lock_irqsave (&dev->lock, flags);
1790 while (!list_empty (&dev->rx_reqs)) {
1791 req = container_of (dev->rx_reqs.next,
1792 struct usb_request, list);
1793 list_del_init (&req->list);
1794 spin_unlock_irqrestore (&dev->lock, flags);
1795
1796 if (rx_submit (dev, req, gfp_flags) < 0) {
1797 defer_kevent (dev, WORK_RX_MEMORY);
1798 return;
1799 }
1800
1801 spin_lock_irqsave (&dev->lock, flags);
1802 }
1803 spin_unlock_irqrestore (&dev->lock, flags);
1804}
1805
1806static void eth_work (void *_dev)
1807{
1808 struct eth_dev *dev = _dev;
1809
907cba35 1810 if (test_and_clear_bit (WORK_RX_MEMORY, &dev->todo)) {
1da177e4
LT		 1811 if (netif_running (dev->net))
1812 rx_fill (dev, GFP_KERNEL);
1da177e4
LT		 1813 }
1814
1815 if (dev->todo)
1816 DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo);
1817}
1818
1819static void tx_complete (struct usb_ep *ep, struct usb_request *req)
1820{
1821 struct sk_buff *skb = req->context;
1822 struct eth_dev *dev = ep->driver_data;
1823
1824 switch (req->status) {
1825 default:
1826 dev->stats.tx_errors++;
1827 VDEBUG (dev, "tx err %d\n", req->status);
1828 /* FALLTHROUGH */
1829 case -ECONNRESET: // unlink
1830 case -ESHUTDOWN: // disconnect etc
1831 break;
1832 case 0:
1833 dev->stats.tx_bytes += skb->len;
1834 }
1835 dev->stats.tx_packets++;
1836
1837 spin_lock (&dev->lock);
1838 list_add (&req->list, &dev->tx_reqs);
1839 spin_unlock (&dev->lock);
1840 dev_kfree_skb_any (skb);
1841
1842 atomic_dec (&dev->tx_qlen);
1843 if (netif_carrier_ok (dev->net))
1844 netif_wake_queue (dev->net);
1845}
1846
1847static inline int eth_is_promisc (struct eth_dev *dev)
1848{
1849 /* no filters for the CDC subset; always promisc */
1850 if (subset_active (dev))
1851 return 1;
1852 return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
1853}
1854
1855static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
1856{
1857 struct eth_dev *dev = netdev_priv(net);
1858 int length = skb->len;
1859 int retval;
1860 struct usb_request *req = NULL;
1861 unsigned long flags;
1862
1863 /* apply outgoing CDC or RNDIS filters */
1864 if (!eth_is_promisc (dev)) {
1865 u8 *dest = skb->data;
1866
1867 if (dest [0] & 0x01) {
1868 u16 type;
1869
1870 /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
1871 * SET_ETHERNET_MULTICAST_FILTERS requests
1872 */
1873 if (memcmp (dest, net->broadcast, ETH_ALEN) == 0)
1874 type = USB_CDC_PACKET_TYPE_BROADCAST;
1875 else
1876 type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
1877 if (!(dev->cdc_filter & type)) {
1878 dev_kfree_skb_any (skb);
1879 return 0;
1880 }
1881 }
1882 /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
1883 }
1884
1885 spin_lock_irqsave (&dev->lock, flags);
1886 req = container_of (dev->tx_reqs.next, struct usb_request, list);
1887 list_del (&req->list);
1888 if (list_empty (&dev->tx_reqs))
1889 netif_stop_queue (net);
1890 spin_unlock_irqrestore (&dev->lock, flags);
1891
1892 /* no buffer copies needed, unless the network stack did it
1893 * or the hardware can't use skb buffers.
1894 * or there's not enough space for any RNDIS headers we need
1895 */
45e45ab4 1896 if (rndis_active(dev)) {
1da177e4
LT		 1897 struct sk_buff *skb_rndis;
1898
1899 skb_rndis = skb_realloc_headroom (skb,
1900 sizeof (struct rndis_packet_msg_type));
1901 if (!skb_rndis)
1902 goto drop;
1903
1904 dev_kfree_skb_any (skb);
1905 skb = skb_rndis;
1906 rndis_add_hdr (skb);
1907 length = skb->len;
1908 }
1da177e4
LT		 1909 req->buf = skb->data;
1910 req->context = skb;
1911 req->complete = tx_complete;
1912
1913 /* use zlp framing on tx for strict CDC-Ether conformance,
1914 * though any robust network rx path ignores extra padding.
1915 * and some hardware doesn't like to write zlps.
1916 */
1917 req->zero = 1;
1918 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
1919 length++;
1920
1921 req->length = length;
1922
1923#ifdef CONFIG_USB_GADGET_DUALSPEED
1924 /* throttle highspeed IRQ rate back slightly */
1925 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
1926 ? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0)
1927 : 0;
1928#endif
1929
1930 retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
1931 switch (retval) {
1932 default:
1933 DEBUG (dev, "tx queue err %d\n", retval);
1934 break;
1935 case 0:
1936 net->trans_start = jiffies;
1937 atomic_inc (&dev->tx_qlen);
1938 }
1939
1940 if (retval) {
1da177e4 1941drop:
1da177e4
LT		 1942 dev->stats.tx_dropped++;
1943 dev_kfree_skb_any (skb);
1944 spin_lock_irqsave (&dev->lock, flags);
1945 if (list_empty (&dev->tx_reqs))
1946 netif_start_queue (net);
1947 list_add (&req->list, &dev->tx_reqs);
1948 spin_unlock_irqrestore (&dev->lock, flags);
1949 }
1950 return 0;
1951}
1952
1953/*-------------------------------------------------------------------------*/
1954
1955#ifdef CONFIG_USB_ETH_RNDIS
1956
907cba35
DB		 1957/* The interrupt endpoint is used in RNDIS to notify the host when messages
1958 * other than data packets are available ... notably the REMOTE_NDIS_*_CMPLT
1959 * messages, but also REMOTE_NDIS_INDICATE_STATUS_MSG and potentially even
1960 * REMOTE_NDIS_KEEPALIVE_MSG.
1961 *
1962 * The RNDIS control queue is processed by GET_ENCAPSULATED_RESPONSE, and
1963 * normally just one notification will be queued.
1964 */
1965
55016f10 1966static struct usb_request *eth_req_alloc (struct usb_ep *, unsigned, gfp_t);
907cba35 1967static void eth_req_free (struct usb_ep *ep, struct usb_request *req);
1da177e4
LT		 1968
1969static void
1970rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
1971{
907cba35
DB		 1972 struct eth_dev *dev = ep->driver_data;
1973
1da177e4 1974 if (req->status || req->actual != req->length)
907cba35 1975 DEBUG (dev,
1da177e4
LT		 1976 "rndis control ack complete --> %d, %d/%d\n",
1977 req->status, req->actual, req->length);
907cba35
DB		 1978 req->context = NULL;
1979
1980 if (req != dev->stat_req)
1981 eth_req_free(ep, req);
1da177e4
LT		 1982}
1983
1984static int rndis_control_ack (struct net_device *net)
1985{
1986 struct eth_dev *dev = netdev_priv(net);
1987 u32 length;
6cdee106 1988 struct usb_request *resp = dev->stat_req;
1da177e4
LT		 1989
1990 /* in case RNDIS calls this after disconnect */
6cdee106 1991 if (!dev->status) {
1da177e4
LT		 1992 DEBUG (dev, "status ENODEV\n");
1993 return -ENODEV;
1994 }
1995
907cba35
DB		 1996 /* in case queue length > 1 */
1997 if (resp->context) {
1998 resp = eth_req_alloc (dev->status_ep, 8, GFP_ATOMIC);
1999 if (!resp)
2000 return -ENOMEM;
2001 }
2002
1da177e4
LT		 2003 /* Send RNDIS RESPONSE_AVAILABLE notification;
2004 * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
2005 */
2006 resp->length = 8;
2007 resp->complete = rndis_control_ack_complete;
907cba35 2008 resp->context = dev;
1da177e4
LT		 2009
2010 *((__le32 *) resp->buf) = __constant_cpu_to_le32 (1);
2011 *((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0);
2012
2013 length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC);
2014 if (length < 0) {
2015 resp->status = 0;
2016 rndis_control_ack_complete (dev->status_ep, resp);
2017 }
2018
2019 return 0;
2020}
2021
45e45ab4
DB		 2022#else
2023
2024#define rndis_control_ack NULL
2025
1da177e4
LT		 2026#endif /* RNDIS */
2027
55016f10 2028static void eth_start (struct eth_dev *dev, gfp_t gfp_flags)
1da177e4
LT		 2029{
2030 DEBUG (dev, "%s\n", __FUNCTION__);
2031
2032 /* fill the rx queue */
2033 rx_fill (dev, gfp_flags);
2034
2035 /* and open the tx floodgates */
2036 atomic_set (&dev->tx_qlen, 0);
2037 netif_wake_queue (dev->net);
45e45ab4 2038 if (rndis_active(dev)) {
1da177e4
LT		 2039 rndis_set_param_medium (dev->rndis_config,
2040 NDIS_MEDIUM_802_3,
6cdee106 2041 BITRATE(dev->gadget)/100);
907cba35 2042 (void) rndis_signal_connect (dev->rndis_config);
1da177e4 2043 }
1da177e4
LT		 2044}
2045
2046static int eth_open (struct net_device *net)
2047{
2048 struct eth_dev *dev = netdev_priv(net);
2049
2050 DEBUG (dev, "%s\n", __FUNCTION__);
2051 if (netif_carrier_ok (dev->net))
2052 eth_start (dev, GFP_KERNEL);
2053 return 0;
2054}
2055
2056static int eth_stop (struct net_device *net)
2057{
2058 struct eth_dev *dev = netdev_priv(net);
2059
2060 VDEBUG (dev, "%s\n", __FUNCTION__);
2061 netif_stop_queue (net);
2062
2063 DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
2064 dev->stats.rx_packets, dev->stats.tx_packets,
2065 dev->stats.rx_errors, dev->stats.tx_errors
2066 );
2067
2068 /* ensure there are no more active requests */
2069 if (dev->config) {
2070 usb_ep_disable (dev->in_ep);
2071 usb_ep_disable (dev->out_ep);
2072 if (netif_carrier_ok (dev->net)) {
2073 DEBUG (dev, "host still using in/out endpoints\n");
2074 // FIXME idiom may leave toggle wrong here
2075 usb_ep_enable (dev->in_ep, dev->in);
2076 usb_ep_enable (dev->out_ep, dev->out);
2077 }
2078 if (dev->status_ep) {
2079 usb_ep_disable (dev->status_ep);
2080 usb_ep_enable (dev->status_ep, dev->status);
2081 }
2082 }
2083
45e45ab4 2084 if (rndis_active(dev)) {
1da177e4
LT		 2085 rndis_set_param_medium (dev->rndis_config,
2086 NDIS_MEDIUM_802_3, 0);
907cba35 2087 (void) rndis_signal_disconnect (dev->rndis_config);
1da177e4 2088 }
1da177e4
LT		 2089
2090 return 0;
2091}
2092
2093/*-------------------------------------------------------------------------*/
2094
907cba35 2095static struct usb_request *
55016f10 2096eth_req_alloc (struct usb_ep *ep, unsigned size, gfp_t gfp_flags)
1da177e4
LT		 2097{
2098 struct usb_request *req;
2099
907cba35 2100 req = usb_ep_alloc_request (ep, gfp_flags);
1da177e4
LT		 2101 if (!req)
2102 return NULL;
2103
907cba35 2104 req->buf = kmalloc (size, gfp_flags);
1da177e4
LT		 2105 if (!req->buf) {
2106 usb_ep_free_request (ep, req);
2107 req = NULL;
2108 }
2109 return req;
2110}
2111
2112static void
2113eth_req_free (struct usb_ep *ep, struct usb_request *req)
2114{
2115 kfree (req->buf);
2116 usb_ep_free_request (ep, req);
2117}
2118
2119
2120static void
2121eth_unbind (struct usb_gadget *gadget)
2122{
2123 struct eth_dev *dev = get_gadget_data (gadget);
2124
2125 DEBUG (dev, "unbind\n");
1da177e4
LT		 2126 rndis_deregister (dev->rndis_config);
2127 rndis_exit ();
1da177e4
LT		 2128
2129 /* we've already been disconnected ... no i/o is active */
2130 if (dev->req) {
2131 eth_req_free (gadget->ep0, dev->req);
2132 dev->req = NULL;
2133 }
2134 if (dev->stat_req) {
2135 eth_req_free (dev->status_ep, dev->stat_req);
2136 dev->stat_req = NULL;
2137 }
2138
2139 unregister_netdev (dev->net);
2140 free_netdev(dev->net);
2141
2142 /* assuming we used keventd, it must quiesce too */
2143 flush_scheduled_work ();
2144 set_gadget_data (gadget, NULL);
2145}
2146
2147static u8 __init nibble (unsigned char c)
2148{
2149 if (likely (isdigit (c)))
2150 return c - '0';
2151 c = toupper (c);
2152 if (likely (isxdigit (c)))
2153 return 10 + c - 'A';
2154 return 0;
2155}
2156
2157static void __init get_ether_addr (const char *str, u8 *dev_addr)
2158{
2159 if (str) {
2160 unsigned i;
2161
2162 for (i = 0; i < 6; i++) {
2163 unsigned char num;
2164
2165 if((*str == '.') || (*str == ':'))
2166 str++;
2167 num = nibble(*str++) << 4;
2168 num |= (nibble(*str++));
2169 dev_addr [i] = num;
2170 }
2171 if (is_valid_ether_addr (dev_addr))
2172 return;
2173 }
2174 random_ether_addr(dev_addr);
2175}
2176
2177static int __init
2178eth_bind (struct usb_gadget *gadget)
2179{
2180 struct eth_dev *dev;
2181 struct net_device *net;
2182 u8 cdc = 1, zlp = 1, rndis = 1;
2183 struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
2184 int status = -ENOMEM;
91e79c91 2185 int gcnum;
1da177e4
LT		 2186
2187 /* these flags are only ever cleared; compiler take note */
2188#ifndef DEV_CONFIG_CDC
2189 cdc = 0;
2190#endif
2191#ifndef CONFIG_USB_ETH_RNDIS
2192 rndis = 0;
2193#endif
2194
2195 /* Because most host side USB stacks handle CDC Ethernet, that
2196 * standard protocol is _strongly_ preferred for interop purposes.
2197 * (By everyone except Microsoft.)
2198 */
91e79c91 2199 if (gadget_is_pxa (gadget)) {
1da177e4
LT		 2200 /* pxa doesn't support altsettings */
2201 cdc = 0;
2202 } else if (gadget_is_sh(gadget)) {
1da177e4
LT		 2203 /* sh doesn't support multiple interfaces or configs */
2204 cdc = 0;
2205 rndis = 0;
2206 } else if (gadget_is_sa1100 (gadget)) {
1da177e4
LT		 2207 /* hardware can't write zlps */
2208 zlp = 0;
2209 /* sa1100 CAN do CDC, without status endpoint ... we use
2210 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth".
2211 */
2212 cdc = 0;
91e79c91
DB		 2213 }
2214
2215 gcnum = usb_gadget_controller_number (gadget);
2216 if (gcnum >= 0)
2217 device_desc.bcdDevice = cpu_to_le16 (0x0200 + gcnum);
2218 else {
1da177e4
LT		 2219 /* can't assume CDC works. don't want to default to
2220 * anything less functional on CDC-capable hardware,
2221 * so we fail in this case.
2222 */
2223 dev_err (&gadget->dev,
2224 "controller '%s' not recognized\n",
2225 gadget->name);
2226 return -ENODEV;
2227 }
2228 snprintf (manufacturer, sizeof manufacturer, "%s %s/%s",
2229 system_utsname.sysname, system_utsname.release,
2230 gadget->name);
2231
2232 /* If there's an RNDIS configuration, that's what Windows wants to
2233 * be using ... so use these product IDs here and in the "linux.inf"
2234 * needed to install MSFT drivers. Current Linux kernels will use
2235 * the second configuration if it's CDC Ethernet, and need some help
2236 * to choose the right configuration otherwise.
2237 */
2238 if (rndis) {
2239 device_desc.idVendor =
2240 __constant_cpu_to_le16(RNDIS_VENDOR_NUM);
2241 device_desc.idProduct =
2242 __constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
2243 snprintf (product_desc, sizeof product_desc,
2244 "RNDIS/%s", driver_desc);
2245
2246 /* CDC subset ... recognized by Linux since 2.4.10, but Windows
2247 * drivers aren't widely available.
2248 */
2249 } else if (!cdc) {
2250 device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
2251 device_desc.idVendor =
2252 __constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
2253 device_desc.idProduct =
2254 __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
2255 }
2256
2257 /* support optional vendor/distro customization */
2258 if (idVendor) {
2259 if (!idProduct) {
2260 dev_err (&gadget->dev, "idVendor needs idProduct!\n");
2261 return -ENODEV;
2262 }
2263 device_desc.idVendor = cpu_to_le16(idVendor);
2264 device_desc.idProduct = cpu_to_le16(idProduct);
2265 if (bcdDevice)
2266 device_desc.bcdDevice = cpu_to_le16(bcdDevice);
2267 }
2268 if (iManufacturer)
2269 strlcpy (manufacturer, iManufacturer, sizeof manufacturer);
2270 if (iProduct)
2271 strlcpy (product_desc, iProduct, sizeof product_desc);
2272
2273 /* all we really need is bulk IN/OUT */
2274 usb_ep_autoconfig_reset (gadget);
2275 in_ep = usb_ep_autoconfig (gadget, &fs_source_desc);
2276 if (!in_ep) {
2277autoconf_fail:
2278 dev_err (&gadget->dev,
2279 "can't autoconfigure on %s\n",
2280 gadget->name);
2281 return -ENODEV;
2282 }
1da177e4
LT		 2283 in_ep->driver_data = in_ep; /* claim */
2284
2285 out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
2286 if (!out_ep)
2287 goto autoconf_fail;
1da177e4
LT		 2288 out_ep->driver_data = out_ep; /* claim */
2289
2290#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
2291 /* CDC Ethernet control interface doesn't require a status endpoint.
2292 * Since some hosts expect one, try to allocate one anyway.
2293 */
2294 if (cdc || rndis) {
2295 status_ep = usb_ep_autoconfig (gadget, &fs_status_desc);
2296 if (status_ep) {
1da177e4
LT		 2297 status_ep->driver_data = status_ep; /* claim */
2298 } else if (rndis) {
2299 dev_err (&gadget->dev,
2300 "can't run RNDIS on %s\n",
2301 gadget->name);
2302 return -ENODEV;
2303#ifdef DEV_CONFIG_CDC
2304 /* pxa25x only does CDC subset; often used with RNDIS */
2305 } else if (cdc) {
2306 control_intf.bNumEndpoints = 0;
2307 /* FIXME remove endpoint from descriptor list */
2308#endif
2309 }
2310 }
2311#endif
2312
2313 /* one config: cdc, else minimal subset */
2314 if (!cdc) {
2315 eth_config.bNumInterfaces = 1;
2316 eth_config.iConfiguration = STRING_SUBSET;
2317 fs_subset_descriptors();
2318 hs_subset_descriptors();
2319 }
2320
2321 /* For now RNDIS is always a second config */
2322 if (rndis)
2323 device_desc.bNumConfigurations = 2;
2324
2325#ifdef CONFIG_USB_GADGET_DUALSPEED
2326 if (rndis)
2327 dev_qualifier.bNumConfigurations = 2;
2328 else if (!cdc)
2329 dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
2330
2331 /* assumes ep0 uses the same value for both speeds ... */
2332 dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
2333
2334 /* and that all endpoints are dual-speed */
2335 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
2336 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
2337#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
907cba35 2338 if (status_ep)
1da177e4
LT		 2339 hs_status_desc.bEndpointAddress =
2340 fs_status_desc.bEndpointAddress;
2341#endif
2342#endif /* DUALSPEED */
2343
2344 device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
2345 usb_gadget_set_selfpowered (gadget);
2346
2347 if (gadget->is_otg) {
2348 otg_descriptor.bmAttributes |= USB_OTG_HNP,
2349 eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2350 eth_config.bMaxPower = 4;
2351#ifdef CONFIG_USB_ETH_RNDIS
2352 rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2353 rndis_config.bMaxPower = 4;
2354#endif
2355 }
2356
2357 net = alloc_etherdev (sizeof *dev);
2358 if (!net)
2359 return status;
2360 dev = netdev_priv(net);
2361 spin_lock_init (&dev->lock);
2362 INIT_WORK (&dev->work, eth_work, dev);
2363 INIT_LIST_HEAD (&dev->tx_reqs);
2364 INIT_LIST_HEAD (&dev->rx_reqs);
2365
2366 /* network device setup */
2367 dev->net = net;
2368 SET_MODULE_OWNER (net);
2369 strcpy (net->name, "usb%d");
2370 dev->cdc = cdc;
2371 dev->zlp = zlp;
2372
2373 dev->in_ep = in_ep;
2374 dev->out_ep = out_ep;
2375 dev->status_ep = status_ep;
2376
2377 /* Module params for these addresses should come from ID proms.
2378 * The host side address is used with CDC and RNDIS, and commonly
2379 * ends up in a persistent config database.
2380 */
2381 get_ether_addr(dev_addr, net->dev_addr);
2382 if (cdc || rndis) {
2383 get_ether_addr(host_addr, dev->host_mac);
2384#ifdef DEV_CONFIG_CDC
2385 snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X",
2386 dev->host_mac [0], dev->host_mac [1],
2387 dev->host_mac [2], dev->host_mac [3],
2388 dev->host_mac [4], dev->host_mac [5]);
2389#endif
2390 }
2391
2392 if (rndis) {
2393 status = rndis_init();
2394 if (status < 0) {
2395 dev_err (&gadget->dev, "can't init RNDIS, %d\n",
2396 status);
2397 goto fail;
2398 }
2399 }
2400
2401 net->change_mtu = eth_change_mtu;
2402 net->get_stats = eth_get_stats;
2403 net->hard_start_xmit = eth_start_xmit;
2404 net->open = eth_open;
2405 net->stop = eth_stop;
2406 // watchdog_timeo, tx_timeout ...
2407 // set_multicast_list
2408 SET_ETHTOOL_OPS(net, &ops);
2409
2410 /* preallocate control message data and buffer */
907cba35 2411 dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ, GFP_KERNEL);
1da177e4
LT		 2412 if (!dev->req)
2413 goto fail;
2414 dev->req->complete = eth_setup_complete;
2415
2416 /* ... and maybe likewise for status transfer */
05f33400 2417#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
1da177e4
LT		 2418 if (dev->status_ep) {
2419 dev->stat_req = eth_req_alloc (dev->status_ep,
907cba35 2420 STATUS_BYTECOUNT, GFP_KERNEL);
1da177e4
LT		 2421 if (!dev->stat_req) {
2422 eth_req_free (gadget->ep0, dev->req);
2423 goto fail;
2424 }
907cba35 2425 dev->stat_req->context = NULL;
1da177e4 2426 }
822e14ac 2427#endif
1da177e4
LT		 2428
2429 /* finish hookup to lower layer ... */
2430 dev->gadget = gadget;
2431 set_gadget_data (gadget, dev);
2432 gadget->ep0->driver_data = dev;
2433
2434 /* two kinds of host-initiated state changes:
2435 * - iff DATA transfer is active, carrier is "on"
2436 * - tx queueing enabled if open *and* carrier is "on"
2437 */
2438 netif_stop_queue (dev->net);
2439 netif_carrier_off (dev->net);
2440
907cba35 2441 SET_NETDEV_DEV (dev->net, &gadget->dev);
1da177e4
LT		 2442 status = register_netdev (dev->net);
2443 if (status < 0)
2444 goto fail1;
2445
2446 INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
2447 INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name,
907cba35
DB		 2448 out_ep->name, in_ep->name,
2449 status_ep ? " STATUS " : "",
2450 status_ep ? status_ep->name : ""
1da177e4
LT		 2451 );
2452 INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2453 net->dev_addr [0], net->dev_addr [1],
2454 net->dev_addr [2], net->dev_addr [3],
2455 net->dev_addr [4], net->dev_addr [5]);
2456
2457 if (cdc || rndis)
2458 INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2459 dev->host_mac [0], dev->host_mac [1],
2460 dev->host_mac [2], dev->host_mac [3],
2461 dev->host_mac [4], dev->host_mac [5]);
2462
1da177e4
LT		 2463 if (rndis) {
2464 u32 vendorID = 0;
2465
2466 /* FIXME RNDIS vendor id == "vendor NIC code" == ? */
2467
2468 dev->rndis_config = rndis_register (rndis_control_ack);
2469 if (dev->rndis_config < 0) {
2470fail0:
2471 unregister_netdev (dev->net);
2472 status = -ENODEV;
2473 goto fail;
2474 }
2475
2476 /* these set up a lot of the OIDs that RNDIS needs */
2477 rndis_set_host_mac (dev->rndis_config, dev->host_mac);
2478 if (rndis_set_param_dev (dev->rndis_config, dev->net,
340600ab 2479 &dev->stats, &dev->cdc_filter))
1da177e4
LT		 2480 goto fail0;
2481 if (rndis_set_param_vendor (dev->rndis_config, vendorID,
2482 manufacturer))
2483 goto fail0;
2484 if (rndis_set_param_medium (dev->rndis_config,
2485 NDIS_MEDIUM_802_3,
2486 0))
2487 goto fail0;
2488 INFO (dev, "RNDIS ready\n");
2489 }
1da177e4
LT		 2490
2491 return status;
2492
2493fail1:
2494 dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status);
2495fail:
2496 eth_unbind (gadget);
2497 return status;
2498}
2499
2500/*-------------------------------------------------------------------------*/
2501
2502static void
2503eth_suspend (struct usb_gadget *gadget)
2504{
2505 struct eth_dev *dev = get_gadget_data (gadget);
2506
2507 DEBUG (dev, "suspend\n");
2508 dev->suspended = 1;
2509}
2510
2511static void
2512eth_resume (struct usb_gadget *gadget)
2513{
2514 struct eth_dev *dev = get_gadget_data (gadget);
2515
2516 DEBUG (dev, "resume\n");
2517 dev->suspended = 0;
2518}
2519
2520/*-------------------------------------------------------------------------*/
2521
2522static struct usb_gadget_driver eth_driver = {
907cba35
DB		 2523 .speed = DEVSPEED,
2524
1da177e4
LT		 2525 .function = (char *) driver_desc,
2526 .bind = eth_bind,
2527 .unbind = eth_unbind,
2528
2529 .setup = eth_setup,
2530 .disconnect = eth_disconnect,
2531
2532 .suspend = eth_suspend,
2533 .resume = eth_resume,
2534
2535 .driver = {
2536 .name = (char *) shortname,
d0d5049f 2537 .owner = THIS_MODULE,
1da177e4
LT		 2538 },
2539};
2540
2541MODULE_DESCRIPTION (DRIVER_DESC);
2542MODULE_AUTHOR ("David Brownell, Benedikt Spanger");
2543MODULE_LICENSE ("GPL");
2544
2545
2546static int __init init (void)
2547{
2548 return usb_gadget_register_driver (&eth_driver);
2549}
2550module_init (init);
2551
2552static void __exit cleanup (void)
2553{
2554 usb_gadget_unregister_driver (&eth_driver);
2555}
2556module_exit (cleanup);
2557
Linux kernel - Deliverables
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