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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / usb / gadget / ether.c
blob3f783cbdc7c3e18345af9f36308e90ade3a81bc1
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"
87 #define DRIVER_VERSION "Equinox 2004"
88
89 static const char shortname [] = "ether";
90 static const char driver_desc [] = DRIVER_DESC;
91
92 #define RX_EXTRA 20 /* guard against rx overflows */
93
94 #ifdef CONFIG_USB_ETH_RNDIS
95 #include "rndis.h"
96 #else
97 #define rndis_init() 0
98 #define rndis_exit() do{}while(0)
99 #endif
100
101 /* CDC and RNDIS support the same host-chosen outgoing packet filters. */
102 #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
103 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \
104 |USB_CDC_PACKET_TYPE_PROMISCUOUS \
105 |USB_CDC_PACKET_TYPE_DIRECTED)
106
107
108 /*-------------------------------------------------------------------------*/
109
110 struct eth_dev {
111 spinlock_t lock;
112 struct usb_gadget *gadget;
113 struct usb_request *req; /* for control responses */
114 struct usb_request *stat_req; /* for cdc & rndis status */
115
116 u8 config;
117 struct usb_ep *in_ep, *out_ep, *status_ep;
118 const struct usb_endpoint_descriptor
119 *in, *out, *status;
120 struct list_head tx_reqs, rx_reqs;
121
122 struct net_device *net;
123 struct net_device_stats stats;
124 atomic_t tx_qlen;
125
126 struct work_struct work;
127 unsigned zlp:1;
128 unsigned cdc:1;
129 unsigned rndis:1;
130 unsigned suspended:1;
131 u16 cdc_filter;
132 unsigned long todo;
133 #define WORK_RX_MEMORY 0
134 int rndis_config;
135 u8 host_mac [ETH_ALEN];
136 };
137
138 /* This version autoconfigures as much as possible at run-time.
139 *
140 * It also ASSUMES a self-powered device, without remote wakeup,
141 * although remote wakeup support would make sense.
142 */
143 static const char *EP_IN_NAME;
144 static const char *EP_OUT_NAME;
145 static const char *EP_STATUS_NAME;
146
147 /*-------------------------------------------------------------------------*/
148
149 /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
150 * Instead: allocate your own, using normal USB-IF procedures.
151 */
152
153 /* Thanks to NetChip Technologies for donating this product ID.
154 * It's for devices with only CDC Ethernet configurations.
155 */
156 #define CDC_VENDOR_NUM 0x0525 /* NetChip */
157 #define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */
158
159 /* For hardware that can't talk CDC, we use the same vendor ID that
160 * ARM Linux has used for ethernet-over-usb, both with sa1100 and
161 * with pxa250. We're protocol-compatible, if the host-side drivers
162 * use the endpoint descriptors. bcdDevice (version) is nonzero, so
163 * drivers that need to hard-wire endpoint numbers have a hook.
164 *
165 * The protocol is a minimal subset of CDC Ether, which works on any bulk
166 * hardware that's not deeply broken ... even on hardware that can't talk
167 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that
168 * doesn't handle control-OUT).
169 */
170 #define SIMPLE_VENDOR_NUM 0x049f
171 #define SIMPLE_PRODUCT_NUM 0x505a
172
173 /* For hardware that can talk RNDIS and either of the above protocols,
174 * use this ID ... the windows INF files will know it. Unless it's
175 * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose
176 * the non-RNDIS configuration.
177 */
178 #define RNDIS_VENDOR_NUM 0x0525 /* NetChip */
179 #define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */
180
181
182 /* Some systems will want different product identifers published in the
183 * device descriptor, either numbers or strings or both. These string
184 * parameters are in UTF-8 (superset of ASCII's 7 bit characters).
185 */
186
187 static ushort __initdata idVendor;
188 module_param(idVendor, ushort, S_IRUGO);
189 MODULE_PARM_DESC(idVendor, "USB Vendor ID");
190
191 static ushort __initdata idProduct;
192 module_param(idProduct, ushort, S_IRUGO);
193 MODULE_PARM_DESC(idProduct, "USB Product ID");
194
195 static ushort __initdata bcdDevice;
196 module_param(bcdDevice, ushort, S_IRUGO);
197 MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)");
198
199 static char *__initdata iManufacturer;
200 module_param(iManufacturer, charp, S_IRUGO);
201 MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string");
202
203 static char *__initdata iProduct;
204 module_param(iProduct, charp, S_IRUGO);
205 MODULE_PARM_DESC(iProduct, "USB Product string");
206
207 /* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
208 static char *__initdata dev_addr;
209 module_param(dev_addr, charp, S_IRUGO);
210 MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
211
212 /* this address is invisible to ifconfig */
213 static char *__initdata host_addr;
214 module_param(host_addr, charp, S_IRUGO);
215 MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
216
217
218 /*-------------------------------------------------------------------------*/
219
220 /* Include CDC support if we could run on CDC-capable hardware. */
221
222 #ifdef CONFIG_USB_GADGET_NET2280
223 #define DEV_CONFIG_CDC
224 #endif
225
226 #ifdef CONFIG_USB_GADGET_DUMMY_HCD
227 #define DEV_CONFIG_CDC
228 #endif
229
230 #ifdef CONFIG_USB_GADGET_GOKU
231 #define DEV_CONFIG_CDC
232 #endif
233
234 #ifdef CONFIG_USB_GADGET_LH7A40X
235 #define DEV_CONFIG_CDC
236 #endif
237
238 #ifdef CONFIG_USB_GADGET_MQ11XX
239 #define DEV_CONFIG_CDC
240 #endif
241
242 #ifdef CONFIG_USB_GADGET_OMAP
243 #define DEV_CONFIG_CDC
244 #endif
245
246 #ifdef CONFIG_USB_GADGET_N9604
247 #define DEV_CONFIG_CDC
248 #endif
249
250 #ifdef CONFIG_USB_GADGET_PXA27X
251 #define DEV_CONFIG_CDC
252 #endif
253
254 #ifdef CONFIG_USB_GADGET_AT91
255 #define DEV_CONFIG_CDC
256 #endif
257
258
259 /* For CDC-incapable hardware, choose the simple cdc subset.
260 * Anything that talks bulk (without notable bugs) can do this.
261 */
262 #ifdef CONFIG_USB_GADGET_PXA2XX
263 #define DEV_CONFIG_SUBSET
264 #endif
265
266 #ifdef CONFIG_USB_GADGET_SH
267 #define DEV_CONFIG_SUBSET
268 #endif
269
270 #ifdef CONFIG_USB_GADGET_SA1100
271 /* use non-CDC for backwards compatibility */
272 #define DEV_CONFIG_SUBSET
273 #endif
274
275 #ifdef CONFIG_USB_GADGET_S3C2410
276 #define DEV_CONFIG_CDC
277 #endif
278
279 /*-------------------------------------------------------------------------*/
280
281 /* "main" config is either CDC, or its simple subset */
282 static inline int is_cdc(struct eth_dev *dev)
283 {
284 #if !defined(DEV_CONFIG_SUBSET)
285 return 1; /* only cdc possible */
286 #elif !defined (DEV_CONFIG_CDC)
287 return 0; /* only subset possible */
288 #else
289 return dev->cdc; /* depends on what hardware we found */
290 #endif
291 }
292
293 /* "secondary" RNDIS config may sometimes be activated */
294 static inline int rndis_active(struct eth_dev *dev)
295 {
296 #ifdef CONFIG_USB_ETH_RNDIS
297 return dev->rndis;
298 #else
299 return 0;
300 #endif
301 }
302
303 #define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev))
304 #define cdc_active(dev) ( is_cdc(dev) && !rndis_active(dev))
305
306
307
308 #define DEFAULT_QLEN 2 /* double buffering by default */
309
310 /* peak bulk transfer bits-per-second */
311 #define HS_BPS (13 * 512 * 8 * 1000 * 8)
312 #define FS_BPS (19 * 64 * 1 * 1000 * 8)
313
314 #ifdef CONFIG_USB_GADGET_DUALSPEED
315
316 static unsigned qmult = 5;
317 module_param (qmult, uint, S_IRUGO|S_IWUSR);
318
319
320 /* for dual-speed hardware, use deeper queues at highspeed */
321 #define qlen(gadget) \
322 (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1))
323
324 /* also defer IRQs on highspeed TX */
325 #define TX_DELAY qmult
326
327 static inline int BITRATE(struct usb_gadget *g)
328 {
329 return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS;
330 }
331
332 #else /* full speed (low speed doesn't do bulk) */
333 #define qlen(gadget) DEFAULT_QLEN
334
335 static inline int BITRATE(struct usb_gadget *g)
336 {
337 return FS_BPS;
338 }
339 #endif
340
341
342 /*-------------------------------------------------------------------------*/
343
344 #define xprintk(d,level,fmt,args...) \
345 printk(level "%s: " fmt , (d)->net->name , ## args)
346
347 #ifdef DEBUG
348 #undef DEBUG
349 #define DEBUG(dev,fmt,args...) \
350 xprintk(dev , KERN_DEBUG , fmt , ## args)
351 #else
352 #define DEBUG(dev,fmt,args...) \
353 do { } while (0)
354 #endif /* DEBUG */
355
356 #ifdef VERBOSE
357 #define VDEBUG DEBUG
358 #else
359 #define VDEBUG(dev,fmt,args...) \
360 do { } while (0)
361 #endif /* DEBUG */
362
363 #define ERROR(dev,fmt,args...) \
364 xprintk(dev , KERN_ERR , fmt , ## args)
365 #define WARN(dev,fmt,args...) \
366 xprintk(dev , KERN_WARNING , fmt , ## args)
367 #define INFO(dev,fmt,args...) \
368 xprintk(dev , KERN_INFO , fmt , ## args)
369
370 /*-------------------------------------------------------------------------*/
371
372 /* USB DRIVER HOOKUP (to the hardware driver, below us), mostly
373 * ep0 implementation: descriptors, config management, setup().
374 * also optional class-specific notification interrupt transfer.
375 */
376
377 /*
378 * DESCRIPTORS ... most are static, but strings and (full) configuration
379 * descriptors are built on demand. For now we do either full CDC, or
380 * our simple subset, with RNDIS as an optional second configuration.
381 *
382 * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But
383 * the class descriptors match a modem (they're ignored; it's really just
384 * Ethernet functionality), they don't need the NOP altsetting, and the
385 * status transfer endpoint isn't optional.
386 */
387
388 #define STRING_MANUFACTURER 1
389 #define STRING_PRODUCT 2
390 #define STRING_ETHADDR 3
391 #define STRING_DATA 4
392 #define STRING_CONTROL 5
393 #define STRING_RNDIS_CONTROL 6
394 #define STRING_CDC 7
395 #define STRING_SUBSET 8
396 #define STRING_RNDIS 9
397
398 #define USB_BUFSIZ 256 /* holds our biggest descriptor */
399
400 /*
401 * This device advertises one configuration, eth_config, unless RNDIS
402 * is enabled (rndis_config) on hardware supporting at least two configs.
403 *
404 * NOTE: Controllers like superh_udc should probably be able to use
405 * an RNDIS-only configuration.
406 *
407 * FIXME define some higher-powered configurations to make it easier
408 * to recharge batteries ...
409 */
410
411 #define DEV_CONFIG_VALUE 1 /* cdc or subset */
412 #define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */
413
414 static struct usb_device_descriptor
415 device_desc = {
416 .bLength = sizeof device_desc,
417 .bDescriptorType = USB_DT_DEVICE,
418
419 .bcdUSB = __constant_cpu_to_le16 (0x0200),
420
421 .bDeviceClass = USB_CLASS_COMM,
422 .bDeviceSubClass = 0,
423 .bDeviceProtocol = 0,
424
425 .idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM),
426 .idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM),
427 .iManufacturer = STRING_MANUFACTURER,
428 .iProduct = STRING_PRODUCT,
429 .bNumConfigurations = 1,
430 };
431
432 static struct usb_otg_descriptor
433 otg_descriptor = {
434 .bLength = sizeof otg_descriptor,
435 .bDescriptorType = USB_DT_OTG,
436
437 .bmAttributes = USB_OTG_SRP,
438 };
439
440 static struct usb_config_descriptor
441 eth_config = {
442 .bLength = sizeof eth_config,
443 .bDescriptorType = USB_DT_CONFIG,
444
445 /* compute wTotalLength on the fly */
446 .bNumInterfaces = 2,
447 .bConfigurationValue = DEV_CONFIG_VALUE,
448 .iConfiguration = STRING_CDC,
449 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
450 .bMaxPower = 50,
451 };
452
453 #ifdef CONFIG_USB_ETH_RNDIS
454 static struct usb_config_descriptor
455 rndis_config = {
456 .bLength = sizeof rndis_config,
457 .bDescriptorType = USB_DT_CONFIG,
458
459 /* compute wTotalLength on the fly */
460 .bNumInterfaces = 2,
461 .bConfigurationValue = DEV_RNDIS_CONFIG_VALUE,
462 .iConfiguration = STRING_RNDIS,
463 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
464 .bMaxPower = 50,
465 };
466 #endif
467
468 /*
469 * Compared to the simple CDC subset, the full CDC Ethernet model adds
470 * three class descriptors, two interface descriptors, optional status
471 * endpoint. Both have a "data" interface and two bulk endpoints.
472 * There are also differences in how control requests are handled.
473 *
474 * RNDIS shares a lot with CDC-Ethernet, since it's a variant of
475 * the CDC-ACM (modem) spec.
476 */
477
478 #ifdef DEV_CONFIG_CDC
479 static struct usb_interface_descriptor
480 control_intf = {
481 .bLength = sizeof control_intf,
482 .bDescriptorType = USB_DT_INTERFACE,
483
484 .bInterfaceNumber = 0,
485 /* status endpoint is optional; this may be patched later */
486 .bNumEndpoints = 1,
487 .bInterfaceClass = USB_CLASS_COMM,
488 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET,
489 .bInterfaceProtocol = USB_CDC_PROTO_NONE,
490 .iInterface = STRING_CONTROL,
491 };
492 #endif
493
494 #ifdef CONFIG_USB_ETH_RNDIS
495 static const struct usb_interface_descriptor
496 rndis_control_intf = {
497 .bLength = sizeof rndis_control_intf,
498 .bDescriptorType = USB_DT_INTERFACE,
499
500 .bInterfaceNumber = 0,
501 .bNumEndpoints = 1,
502 .bInterfaceClass = USB_CLASS_COMM,
503 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
504 .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
505 .iInterface = STRING_RNDIS_CONTROL,
506 };
507 #endif
508
509 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
510
511 static const struct usb_cdc_header_desc header_desc = {
512 .bLength = sizeof header_desc,
513 .bDescriptorType = USB_DT_CS_INTERFACE,
514 .bDescriptorSubType = USB_CDC_HEADER_TYPE,
515
516 .bcdCDC = __constant_cpu_to_le16 (0x0110),
517 };
518
519 static const struct usb_cdc_union_desc union_desc = {
520 .bLength = sizeof union_desc,
521 .bDescriptorType = USB_DT_CS_INTERFACE,
522 .bDescriptorSubType = USB_CDC_UNION_TYPE,
523
524 .bMasterInterface0 = 0, /* index of control interface */
525 .bSlaveInterface0 = 1, /* index of DATA interface */
526 };
527
528 #endif /* CDC || RNDIS */
529
530 #ifdef CONFIG_USB_ETH_RNDIS
531
532 static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
533 .bLength = sizeof call_mgmt_descriptor,
534 .bDescriptorType = USB_DT_CS_INTERFACE,
535 .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
536
537 .bmCapabilities = 0x00,
538 .bDataInterface = 0x01,
539 };
540
541 static struct usb_cdc_acm_descriptor acm_descriptor = {
542 .bLength = sizeof acm_descriptor,
543 .bDescriptorType = USB_DT_CS_INTERFACE,
544 .bDescriptorSubType = USB_CDC_ACM_TYPE,
545
546 .bmCapabilities = 0x00,
547 };
548
549 #endif
550
551 #ifdef DEV_CONFIG_CDC
552
553 static const struct usb_cdc_ether_desc ether_desc = {
554 .bLength = sizeof ether_desc,
555 .bDescriptorType = USB_DT_CS_INTERFACE,
556 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
557
558 /* this descriptor actually adds value, surprise! */
559 .iMACAddress = STRING_ETHADDR,
560 .bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */
561 .wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN),
562 .wNumberMCFilters = __constant_cpu_to_le16 (0),
563 .bNumberPowerFilters = 0,
564 };
565
566 #endif
567
568 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
569
570 /* include the status endpoint if we can, even where it's optional.
571 * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one
572 * packet, to simplify cancellation; and a big transfer interval, to
573 * waste less bandwidth.
574 *
575 * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even
576 * if they ignore the connect/disconnect notifications that real aether
577 * can provide. more advanced cdc configurations might want to support
578 * encapsulated commands (vendor-specific, using control-OUT).
579 *
580 * RNDIS requires the status endpoint, since it uses that encapsulation
581 * mechanism for its funky RPC scheme.
582 */
583
584 #define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
585 #define STATUS_BYTECOUNT 16 /* 8 byte header + data */
586
587 static struct usb_endpoint_descriptor
588 fs_status_desc = {
589 .bLength = USB_DT_ENDPOINT_SIZE,
590 .bDescriptorType = USB_DT_ENDPOINT,
591
592 .bEndpointAddress = USB_DIR_IN,
593 .bmAttributes = USB_ENDPOINT_XFER_INT,
594 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
595 .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
596 };
597 #endif
598
599 #ifdef DEV_CONFIG_CDC
600
601 /* the default data interface has no endpoints ... */
602
603 static const struct usb_interface_descriptor
604 data_nop_intf = {
605 .bLength = sizeof data_nop_intf,
606 .bDescriptorType = USB_DT_INTERFACE,
607
608 .bInterfaceNumber = 1,
609 .bAlternateSetting = 0,
610 .bNumEndpoints = 0,
611 .bInterfaceClass = USB_CLASS_CDC_DATA,
612 .bInterfaceSubClass = 0,
613 .bInterfaceProtocol = 0,
614 };
615
616 /* ... but the "real" data interface has two bulk endpoints */
617
618 static const struct usb_interface_descriptor
619 data_intf = {
620 .bLength = sizeof data_intf,
621 .bDescriptorType = USB_DT_INTERFACE,
622
623 .bInterfaceNumber = 1,
624 .bAlternateSetting = 1,
625 .bNumEndpoints = 2,
626 .bInterfaceClass = USB_CLASS_CDC_DATA,
627 .bInterfaceSubClass = 0,
628 .bInterfaceProtocol = 0,
629 .iInterface = STRING_DATA,
630 };
631
632 #endif
633
634 #ifdef CONFIG_USB_ETH_RNDIS
635
636 /* RNDIS doesn't activate by changing to the "real" altsetting */
637
638 static const struct usb_interface_descriptor
639 rndis_data_intf = {
640 .bLength = sizeof rndis_data_intf,
641 .bDescriptorType = USB_DT_INTERFACE,
642
643 .bInterfaceNumber = 1,
644 .bAlternateSetting = 0,
645 .bNumEndpoints = 2,
646 .bInterfaceClass = USB_CLASS_CDC_DATA,
647 .bInterfaceSubClass = 0,
648 .bInterfaceProtocol = 0,
649 .iInterface = STRING_DATA,
650 };
651
652 #endif
653
654 #ifdef DEV_CONFIG_SUBSET
655
656 /*
657 * "Simple" CDC-subset option is a simple vendor-neutral model that most
658 * full speed controllers can handle: one interface, two bulk endpoints.
659 */
660
661 static const struct usb_interface_descriptor
662 subset_data_intf = {
663 .bLength = sizeof subset_data_intf,
664 .bDescriptorType = USB_DT_INTERFACE,
665
666 .bInterfaceNumber = 0,
667 .bAlternateSetting = 0,
668 .bNumEndpoints = 2,
669 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
670 .bInterfaceSubClass = 0,
671 .bInterfaceProtocol = 0,
672 .iInterface = STRING_DATA,
673 };
674
675 #endif /* SUBSET */
676
677
678 static struct usb_endpoint_descriptor
679 fs_source_desc = {
680 .bLength = USB_DT_ENDPOINT_SIZE,
681 .bDescriptorType = USB_DT_ENDPOINT,
682
683 .bEndpointAddress = USB_DIR_IN,
684 .bmAttributes = USB_ENDPOINT_XFER_BULK,
685 };
686
687 static struct usb_endpoint_descriptor
688 fs_sink_desc = {
689 .bLength = USB_DT_ENDPOINT_SIZE,
690 .bDescriptorType = USB_DT_ENDPOINT,
691
692 .bEndpointAddress = USB_DIR_OUT,
693 .bmAttributes = USB_ENDPOINT_XFER_BULK,
694 };
695
696 static const struct usb_descriptor_header *fs_eth_function [11] = {
697 (struct usb_descriptor_header *) &otg_descriptor,
698 #ifdef DEV_CONFIG_CDC
699 /* "cdc" mode descriptors */
700 (struct usb_descriptor_header *) &control_intf,
701 (struct usb_descriptor_header *) &header_desc,
702 (struct usb_descriptor_header *) &union_desc,
703 (struct usb_descriptor_header *) &ether_desc,
704 /* NOTE: status endpoint may need to be removed */
705 (struct usb_descriptor_header *) &fs_status_desc,
706 /* data interface, with altsetting */
707 (struct usb_descriptor_header *) &data_nop_intf,
708 (struct usb_descriptor_header *) &data_intf,
709 (struct usb_descriptor_header *) &fs_source_desc,
710 (struct usb_descriptor_header *) &fs_sink_desc,
711 NULL,
712 #endif /* DEV_CONFIG_CDC */
713 };
714
715 static inline void __init fs_subset_descriptors(void)
716 {
717 #ifdef DEV_CONFIG_SUBSET
718 fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
719 fs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
720 fs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
721 fs_eth_function[4] = NULL;
722 #else
723 fs_eth_function[1] = NULL;
724 #endif
725 }
726
727 #ifdef CONFIG_USB_ETH_RNDIS
728 static const struct usb_descriptor_header *fs_rndis_function [] = {
729 (struct usb_descriptor_header *) &otg_descriptor,
730 /* control interface matches ACM, not Ethernet */
731 (struct usb_descriptor_header *) &rndis_control_intf,
732 (struct usb_descriptor_header *) &header_desc,
733 (struct usb_descriptor_header *) &call_mgmt_descriptor,
734 (struct usb_descriptor_header *) &acm_descriptor,
735 (struct usb_descriptor_header *) &union_desc,
736 (struct usb_descriptor_header *) &fs_status_desc,
737 /* data interface has no altsetting */
738 (struct usb_descriptor_header *) &rndis_data_intf,
739 (struct usb_descriptor_header *) &fs_source_desc,
740 (struct usb_descriptor_header *) &fs_sink_desc,
741 NULL,
742 };
743 #endif
744
745 #ifdef CONFIG_USB_GADGET_DUALSPEED
746
747 /*
748 * usb 2.0 devices need to expose both high speed and full speed
749 * descriptors, unless they only run at full speed.
750 */
751
752 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
753 static struct usb_endpoint_descriptor
754 hs_status_desc = {
755 .bLength = USB_DT_ENDPOINT_SIZE,
756 .bDescriptorType = USB_DT_ENDPOINT,
757
758 .bmAttributes = USB_ENDPOINT_XFER_INT,
759 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT),
760 .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
761 };
762 #endif /* DEV_CONFIG_CDC */
763
764 static struct usb_endpoint_descriptor
765 hs_source_desc = {
766 .bLength = USB_DT_ENDPOINT_SIZE,
767 .bDescriptorType = USB_DT_ENDPOINT,
768
769 .bmAttributes = USB_ENDPOINT_XFER_BULK,
770 .wMaxPacketSize = __constant_cpu_to_le16 (512),
771 };
772
773 static struct usb_endpoint_descriptor
774 hs_sink_desc = {
775 .bLength = USB_DT_ENDPOINT_SIZE,
776 .bDescriptorType = USB_DT_ENDPOINT,
777
778 .bmAttributes = USB_ENDPOINT_XFER_BULK,
779 .wMaxPacketSize = __constant_cpu_to_le16 (512),
780 };
781
782 static struct usb_qualifier_descriptor
783 dev_qualifier = {
784 .bLength = sizeof dev_qualifier,
785 .bDescriptorType = USB_DT_DEVICE_QUALIFIER,
786
787 .bcdUSB = __constant_cpu_to_le16 (0x0200),
788 .bDeviceClass = USB_CLASS_COMM,
789
790 .bNumConfigurations = 1,
791 };
792
793 static const struct usb_descriptor_header *hs_eth_function [11] = {
794 (struct usb_descriptor_header *) &otg_descriptor,
795 #ifdef DEV_CONFIG_CDC
796 /* "cdc" mode descriptors */
797 (struct usb_descriptor_header *) &control_intf,
798 (struct usb_descriptor_header *) &header_desc,
799 (struct usb_descriptor_header *) &union_desc,
800 (struct usb_descriptor_header *) &ether_desc,
801 /* NOTE: status endpoint may need to be removed */
802 (struct usb_descriptor_header *) &hs_status_desc,
803 /* data interface, with altsetting */
804 (struct usb_descriptor_header *) &data_nop_intf,
805 (struct usb_descriptor_header *) &data_intf,
806 (struct usb_descriptor_header *) &hs_source_desc,
807 (struct usb_descriptor_header *) &hs_sink_desc,
808 NULL,
809 #endif /* DEV_CONFIG_CDC */
810 };
811
812 static inline void __init hs_subset_descriptors(void)
813 {
814 #ifdef DEV_CONFIG_SUBSET
815 hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf;
816 hs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc;
817 hs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc;
818 hs_eth_function[4] = NULL;
819 #else
820 hs_eth_function[1] = NULL;
821 #endif
822 }
823
824 #ifdef CONFIG_USB_ETH_RNDIS
825 static const struct usb_descriptor_header *hs_rndis_function [] = {
826 (struct usb_descriptor_header *) &otg_descriptor,
827 /* control interface matches ACM, not Ethernet */
828 (struct usb_descriptor_header *) &rndis_control_intf,
829 (struct usb_descriptor_header *) &header_desc,
830 (struct usb_descriptor_header *) &call_mgmt_descriptor,
831 (struct usb_descriptor_header *) &acm_descriptor,
832 (struct usb_descriptor_header *) &union_desc,
833 (struct usb_descriptor_header *) &hs_status_desc,
834 /* data interface has no altsetting */
835 (struct usb_descriptor_header *) &rndis_data_intf,
836 (struct usb_descriptor_header *) &hs_source_desc,
837 (struct usb_descriptor_header *) &hs_sink_desc,
838 NULL,
839 };
840 #endif
841
842
843 /* maxpacket and other transfer characteristics vary by speed. */
844 #define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs))
845
846 #else
847
848 /* if there's no high speed support, maxpacket doesn't change. */
849 #define ep_desc(g,hs,fs) fs
850
851 static inline void __init hs_subset_descriptors(void)
852 {
853 }
854
855 #endif /* !CONFIG_USB_GADGET_DUALSPEED */
856
857 /*-------------------------------------------------------------------------*/
858
859 /* descriptors that are built on-demand */
860
861 static char manufacturer [50];
862 static char product_desc [40] = DRIVER_DESC;
863
864 #ifdef DEV_CONFIG_CDC
865 /* address that the host will use ... usually assigned at random */
866 static char ethaddr [2 * ETH_ALEN + 1];
867 #endif
868
869 /* static strings, in UTF-8 */
870 static struct usb_string strings [] = {
871 { STRING_MANUFACTURER, manufacturer, },
872 { STRING_PRODUCT, product_desc, },
873 { STRING_DATA, "Ethernet Data", },
874 #ifdef DEV_CONFIG_CDC
875 { STRING_CDC, "CDC Ethernet", },
876 { STRING_ETHADDR, ethaddr, },
877 { STRING_CONTROL, "CDC Communications Control", },
878 #endif
879 #ifdef DEV_CONFIG_SUBSET
880 { STRING_SUBSET, "CDC Ethernet Subset", },
881 #endif
882 #ifdef CONFIG_USB_ETH_RNDIS
883 { STRING_RNDIS, "RNDIS", },
884 { STRING_RNDIS_CONTROL, "RNDIS Communications Control", },
885 #endif
886 { } /* end of list */
887 };
888
889 static struct usb_gadget_strings stringtab = {
890 .language = 0x0409, /* en-us */
891 .strings = strings,
892 };
893
894 /*
895 * one config, two interfaces: control, data.
896 * complications: class descriptors, and an altsetting.
897 */
898 static int
899 config_buf (enum usb_device_speed speed,
900 u8 *buf, u8 type,
901 unsigned index, int is_otg)
902 {
903 int len;
904 const struct usb_config_descriptor *config;
905 const struct usb_descriptor_header **function;
906 #ifdef CONFIG_USB_GADGET_DUALSPEED
907 int hs = (speed == USB_SPEED_HIGH);
908
909 if (type == USB_DT_OTHER_SPEED_CONFIG)
910 hs = !hs;
911 #define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function)
912 #else
913 #define which_fn(t) (fs_ ## t ## _function)
914 #endif
915
916 if (index >= device_desc.bNumConfigurations)
917 return -EINVAL;
918
919 #ifdef CONFIG_USB_ETH_RNDIS
920 /* list the RNDIS config first, to make Microsoft's drivers
921 * happy. DOCSIS 1.0 needs this too.
922 */
923 if (device_desc.bNumConfigurations == 2 && index == 0) {
924 config = &rndis_config;
925 function = which_fn (rndis);
926 } else
927 #endif
928 {
929 config = &eth_config;
930 function = which_fn (eth);
931 }
932
933 /* for now, don't advertise srp-only devices */
934 if (!is_otg)
935 function++;
936
937 len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function);
938 if (len < 0)
939 return len;
940 ((struct usb_config_descriptor *) buf)->bDescriptorType = type;
941 return len;
942 }
943
944 /*-------------------------------------------------------------------------*/
945
946 static void eth_start (struct eth_dev *dev, int gfp_flags);
947 static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags);
948
949 #ifdef DEV_CONFIG_CDC
950 static inline int ether_alt_ep_setup (struct eth_dev *dev, struct usb_ep *ep)
951 {
952 const struct usb_endpoint_descriptor *d;
953
954 /* With CDC, the host isn't allowed to use these two data
955 * endpoints in the default altsetting for the interface.
956 * so we don't activate them yet. Reset from SET_INTERFACE.
957 *
958 * Strictly speaking RNDIS should work the same: activation is
959 * a side effect of setting a packet filter. Deactivation is
960 * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG.
961 */
962
963 /* one endpoint writes data back IN to the host */
964 if (strcmp (ep->name, EP_IN_NAME) == 0) {
965 d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc);
966 ep->driver_data = dev;
967 dev->in = d;
968
969 /* one endpoint just reads OUT packets */
970 } else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
971 d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc);
972 ep->driver_data = dev;
973 dev->out = d;
974
975 /* optional status/notification endpoint */
976 } else if (EP_STATUS_NAME &&
977 strcmp (ep->name, EP_STATUS_NAME) == 0) {
978 int result;
979
980 d = ep_desc (dev->gadget, &hs_status_desc, &fs_status_desc);
981 result = usb_ep_enable (ep, d);
982 if (result < 0)
983 return result;
984
985 ep->driver_data = dev;
986 dev->status = d;
987 }
988 return 0;
989 }
990 #endif
991
992 #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
993 static inline int ether_ep_setup (struct eth_dev *dev, struct usb_ep *ep)
994 {
995 int result;
996 const struct usb_endpoint_descriptor *d;
997
998 /* CDC subset is simpler: if the device is there,
999 * it's live with rx and tx endpoints.
1000 *
1001 * Do this as a shortcut for RNDIS too.
1002 */
1003
1004 /* one endpoint writes data back IN to the host */
1005 if (strcmp (ep->name, EP_IN_NAME) == 0) {
1006 d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc);
1007 result = usb_ep_enable (ep, d);
1008 if (result < 0)
1009 return result;
1010
1011 ep->driver_data = dev;
1012 dev->in = d;
1013
1014 /* one endpoint just reads OUT packets */
1015 } else if (strcmp (ep->name, EP_OUT_NAME) == 0) {
1016 d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc);
1017 result = usb_ep_enable (ep, d);
1018 if (result < 0)
1019 return result;
1020
1021 ep->driver_data = dev;
1022 dev->out = d;
1023 }
1024
1025 return 0;
1026 }
1027 #endif
1028
1029 static int
1030 set_ether_config (struct eth_dev *dev, int gfp_flags)
1031 {
1032 int result = 0;
1033 struct usb_ep *ep;
1034 struct usb_gadget *gadget = dev->gadget;
1035
1036 gadget_for_each_ep (ep, gadget) {
1037 #ifdef DEV_CONFIG_CDC
1038 if (!dev->rndis && dev->cdc) {
1039 result = ether_alt_ep_setup (dev, ep);
1040 if (result == 0)
1041 continue;
1042 }
1043 #endif
1044
1045 #ifdef CONFIG_USB_ETH_RNDIS
1046 if (dev->rndis && strcmp (ep->name, EP_STATUS_NAME) == 0) {
1047 const struct usb_endpoint_descriptor *d;
1048 d = ep_desc (gadget, &hs_status_desc, &fs_status_desc);
1049 result = usb_ep_enable (ep, d);
1050 if (result == 0) {
1051 ep->driver_data = dev;
1052 dev->status = d;
1053 continue;
1054 }
1055 } else
1056 #endif
1057
1058 {
1059 #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
1060 result = ether_ep_setup (dev, ep);
1061 if (result == 0)
1062 continue;
1063 #endif
1064 }
1065
1066 /* stop on error */
1067 ERROR (dev, "can't enable %s, result %d\n", ep->name, result);
1068 break;
1069 }
1070 if (!result && (!dev->in_ep || !dev->out_ep))
1071 result = -ENODEV;
1072
1073 if (result == 0)
1074 result = alloc_requests (dev, qlen (gadget), gfp_flags);
1075
1076 /* on error, disable any endpoints */
1077 if (result < 0) {
1078 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
1079 if (dev->status)
1080 (void) usb_ep_disable (dev->status_ep);
1081 #endif
1082 dev->status = NULL;
1083 #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
1084 if (dev->rndis || !dev->cdc) {
1085 if (dev->in)
1086 (void) usb_ep_disable (dev->in_ep);
1087 if (dev->out)
1088 (void) usb_ep_disable (dev->out_ep);
1089 }
1090 #endif
1091 dev->in = NULL;
1092 dev->out = NULL;
1093 } else
1094
1095 /* activate non-CDC configs right away
1096 * this isn't strictly according to the RNDIS spec
1097 */
1098 #if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS)
1099 if (dev->rndis || !dev->cdc) {
1100 netif_carrier_on (dev->net);
1101 if (netif_running (dev->net)) {
1102 spin_unlock (&dev->lock);
1103 eth_start (dev, GFP_ATOMIC);
1104 spin_lock (&dev->lock);
1105 }
1106 }
1107 #endif
1108
1109 if (result == 0)
1110 DEBUG (dev, "qlen %d\n", qlen (gadget));
1111
1112 /* caller is responsible for cleanup on error */
1113 return result;
1114 }
1115
1116 static void eth_reset_config (struct eth_dev *dev)
1117 {
1118 struct usb_request *req;
1119
1120 if (dev->config == 0)
1121 return;
1122
1123 DEBUG (dev, "%s\n", __FUNCTION__);
1124
1125 netif_stop_queue (dev->net);
1126 netif_carrier_off (dev->net);
1127
1128 /* disable endpoints, forcing (synchronous) completion of
1129 * pending i/o. then free the requests.
1130 */
1131 if (dev->in) {
1132 usb_ep_disable (dev->in_ep);
1133 while (likely (!list_empty (&dev->tx_reqs))) {
1134 req = container_of (dev->tx_reqs.next,
1135 struct usb_request, list);
1136 list_del (&req->list);
1137 usb_ep_free_request (dev->in_ep, req);
1138 }
1139 }
1140 if (dev->out) {
1141 usb_ep_disable (dev->out_ep);
1142 while (likely (!list_empty (&dev->rx_reqs))) {
1143 req = container_of (dev->rx_reqs.next,
1144 struct usb_request, list);
1145 list_del (&req->list);
1146 usb_ep_free_request (dev->out_ep, req);
1147 }
1148 }
1149
1150 if (dev->status) {
1151 usb_ep_disable (dev->status_ep);
1152 }
1153 dev->config = 0;
1154 }
1155
1156 /* change our operational config. must agree with the code
1157 * that returns config descriptors, and altsetting code.
1158 */
1159 static int
1160 eth_set_config (struct eth_dev *dev, unsigned number, int gfp_flags)
1161 {
1162 int result = 0;
1163 struct usb_gadget *gadget = dev->gadget;
1164
1165 if (number == dev->config)
1166 return 0;
1167
1168 if (gadget_is_sa1100 (gadget)
1169 && dev->config
1170 && atomic_read (&dev->tx_qlen) != 0) {
1171 /* tx fifo is full, but we can't clear it...*/
1172 INFO (dev, "can't change configurations\n");
1173 return -ESPIPE;
1174 }
1175 eth_reset_config (dev);
1176
1177 /* default: pass all packets, no multicast filtering */
1178 dev->cdc_filter = DEFAULT_FILTER;
1179
1180 switch (number) {
1181 case DEV_CONFIG_VALUE:
1182 dev->rndis = 0;
1183 result = set_ether_config (dev, gfp_flags);
1184 break;
1185 #ifdef CONFIG_USB_ETH_RNDIS
1186 case DEV_RNDIS_CONFIG_VALUE:
1187 dev->rndis = 1;
1188 result = set_ether_config (dev, gfp_flags);
1189 break;
1190 #endif
1191 default:
1192 result = -EINVAL;
1193 /* FALL THROUGH */
1194 case 0:
1195 break;
1196 }
1197
1198 if (result) {
1199 if (number)
1200 eth_reset_config (dev);
1201 usb_gadget_vbus_draw(dev->gadget,
1202 dev->gadget->is_otg ? 8 : 100);
1203 } else {
1204 char *speed;
1205 unsigned power;
1206
1207 power = 2 * eth_config.bMaxPower;
1208 usb_gadget_vbus_draw(dev->gadget, power);
1209
1210 switch (gadget->speed) {
1211 case USB_SPEED_FULL: speed = "full"; break;
1212 #ifdef CONFIG_USB_GADGET_DUALSPEED
1213 case USB_SPEED_HIGH: speed = "high"; break;
1214 #endif
1215 default: speed = "?"; break;
1216 }
1217
1218 dev->config = number;
1219 INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n",
1220 speed, number, power, driver_desc,
1221 dev->rndis
1222 ? "RNDIS"
1223 : (dev->cdc
1224 ? "CDC Ethernet"
1225 : "CDC Ethernet Subset"));
1226 }
1227 return result;
1228 }
1229
1230 /*-------------------------------------------------------------------------*/
1231
1232 #ifdef DEV_CONFIG_CDC
1233
1234 static void eth_status_complete (struct usb_ep *ep, struct usb_request *req)
1235 {
1236 struct usb_cdc_notification *event = req->buf;
1237 int value = req->status;
1238 struct eth_dev *dev = ep->driver_data;
1239
1240 /* issue the second notification if host reads the first */
1241 if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION
1242 && value == 0) {
1243 __le32 *data = req->buf + sizeof *event;
1244
1245 event->bmRequestType = 0xA1;
1246 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE;
1247 event->wValue = __constant_cpu_to_le16 (0);
1248 event->wIndex = __constant_cpu_to_le16 (1);
1249 event->wLength = __constant_cpu_to_le16 (8);
1250
1251 /* SPEED_CHANGE data is up/down speeds in bits/sec */
1252 data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget));
1253
1254 req->length = STATUS_BYTECOUNT;
1255 value = usb_ep_queue (ep, req, GFP_ATOMIC);
1256 DEBUG (dev, "send SPEED_CHANGE --> %d\n", value);
1257 if (value == 0)
1258 return;
1259 } else if (value != -ECONNRESET)
1260 DEBUG (dev, "event %02x --> %d\n",
1261 event->bNotificationType, value);
1262 event->bmRequestType = 0xff;
1263 }
1264
1265 static void issue_start_status (struct eth_dev *dev)
1266 {
1267 struct usb_request *req = dev->stat_req;
1268 struct usb_cdc_notification *event;
1269 int value;
1270
1271 DEBUG (dev, "%s, flush old status first\n", __FUNCTION__);
1272
1273 /* flush old status
1274 *
1275 * FIXME ugly idiom, maybe we'd be better with just
1276 * a "cancel the whole queue" primitive since any
1277 * unlink-one primitive has way too many error modes.
1278 * here, we "know" toggle is already clear...
1279 */
1280 usb_ep_disable (dev->status_ep);
1281 usb_ep_enable (dev->status_ep, dev->status);
1282
1283 /* 3.8.1 says to issue first NETWORK_CONNECTION, then
1284 * a SPEED_CHANGE. could be useful in some configs.
1285 */
1286 event = req->buf;
1287 event->bmRequestType = 0xA1;
1288 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION;
1289 event->wValue = __constant_cpu_to_le16 (1); /* connected */
1290 event->wIndex = __constant_cpu_to_le16 (1);
1291 event->wLength = 0;
1292
1293 req->length = sizeof *event;
1294 req->complete = eth_status_complete;
1295 value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC);
1296 if (value < 0)
1297 DEBUG (dev, "status buf queue --> %d\n", value);
1298 }
1299
1300 #endif
1301
1302 /*-------------------------------------------------------------------------*/
1303
1304 static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req)
1305 {
1306 if (req->status || req->actual != req->length)
1307 DEBUG ((struct eth_dev *) ep->driver_data,
1308 "setup complete --> %d, %d/%d\n",
1309 req->status, req->actual, req->length);
1310 }
1311
1312 #ifdef CONFIG_USB_ETH_RNDIS
1313
1314 static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req)
1315 {
1316 if (req->status || req->actual != req->length)
1317 DEBUG ((struct eth_dev *) ep->driver_data,
1318 "rndis response complete --> %d, %d/%d\n",
1319 req->status, req->actual, req->length);
1320
1321 /* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */
1322 }
1323
1324 static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req)
1325 {
1326 struct eth_dev *dev = ep->driver_data;
1327 int status;
1328
1329 /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
1330 spin_lock(&dev->lock);
1331 status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf);
1332 if (status < 0)
1333 ERROR(dev, "%s: rndis parse error %d\n", __FUNCTION__, status);
1334 spin_unlock(&dev->lock);
1335 }
1336
1337 #endif /* RNDIS */
1338
1339 /*
1340 * The setup() callback implements all the ep0 functionality that's not
1341 * handled lower down. CDC has a number of less-common features:
1342 *
1343 * - two interfaces: control, and ethernet data
1344 * - Ethernet data interface has two altsettings: default, and active
1345 * - class-specific descriptors for the control interface
1346 * - class-specific control requests
1347 */
1348 static int
1349 eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
1350 {
1351 struct eth_dev *dev = get_gadget_data (gadget);
1352 struct usb_request *req = dev->req;
1353 int value = -EOPNOTSUPP;
1354 u16 wIndex = (__force u16) ctrl->wIndex;
1355 u16 wValue = (__force u16) ctrl->wValue;
1356 u16 wLength = (__force u16) ctrl->wLength;
1357
1358 /* descriptors just go into the pre-allocated ep0 buffer,
1359 * while config change events may enable network traffic.
1360 */
1361 req->complete = eth_setup_complete;
1362 switch (ctrl->bRequest) {
1363
1364 case USB_REQ_GET_DESCRIPTOR:
1365 if (ctrl->bRequestType != USB_DIR_IN)
1366 break;
1367 switch (wValue >> 8) {
1368
1369 case USB_DT_DEVICE:
1370 value = min (wLength, (u16) sizeof device_desc);
1371 memcpy (req->buf, &device_desc, value);
1372 break;
1373 #ifdef CONFIG_USB_GADGET_DUALSPEED
1374 case USB_DT_DEVICE_QUALIFIER:
1375 if (!gadget->is_dualspeed)
1376 break;
1377 value = min (wLength, (u16) sizeof dev_qualifier);
1378 memcpy (req->buf, &dev_qualifier, value);
1379 break;
1380
1381 case USB_DT_OTHER_SPEED_CONFIG:
1382 if (!gadget->is_dualspeed)
1383 break;
1384 // FALLTHROUGH
1385 #endif /* CONFIG_USB_GADGET_DUALSPEED */
1386 case USB_DT_CONFIG:
1387 value = config_buf (gadget->speed, req->buf,
1388 wValue >> 8,
1389 wValue & 0xff,
1390 gadget->is_otg);
1391 if (value >= 0)
1392 value = min (wLength, (u16) value);
1393 break;
1394
1395 case USB_DT_STRING:
1396 value = usb_gadget_get_string (&stringtab,
1397 wValue & 0xff, req->buf);
1398 if (value >= 0)
1399 value = min (wLength, (u16) value);
1400 break;
1401 }
1402 break;
1403
1404 case USB_REQ_SET_CONFIGURATION:
1405 if (ctrl->bRequestType != 0)
1406 break;
1407 if (gadget->a_hnp_support)
1408 DEBUG (dev, "HNP available\n");
1409 else if (gadget->a_alt_hnp_support)
1410 DEBUG (dev, "HNP needs a different root port\n");
1411 spin_lock (&dev->lock);
1412 value = eth_set_config (dev, wValue, GFP_ATOMIC);
1413 spin_unlock (&dev->lock);
1414 break;
1415 case USB_REQ_GET_CONFIGURATION:
1416 if (ctrl->bRequestType != USB_DIR_IN)
1417 break;
1418 *(u8 *)req->buf = dev->config;
1419 value = min (wLength, (u16) 1);
1420 break;
1421
1422 case USB_REQ_SET_INTERFACE:
1423 if (ctrl->bRequestType != USB_RECIP_INTERFACE
1424 || !dev->config
1425 || wIndex > 1)
1426 break;
1427 if (!dev->cdc && wIndex != 0)
1428 break;
1429 spin_lock (&dev->lock);
1430
1431 /* PXA hardware partially handles SET_INTERFACE;
1432 * we need to kluge around that interference.
1433 */
1434 if (gadget_is_pxa (gadget)) {
1435 value = eth_set_config (dev, DEV_CONFIG_VALUE,
1436 GFP_ATOMIC);
1437 goto done_set_intf;
1438 }
1439
1440 #ifdef DEV_CONFIG_CDC
1441 switch (wIndex) {
1442 case 0: /* control/master intf */
1443 if (wValue != 0)
1444 break;
1445 if (dev->status) {
1446 usb_ep_disable (dev->status_ep);
1447 usb_ep_enable (dev->status_ep, dev->status);
1448 }
1449 value = 0;
1450 break;
1451 case 1: /* data intf */
1452 if (wValue > 1)
1453 break;
1454 usb_ep_disable (dev->in_ep);
1455 usb_ep_disable (dev->out_ep);
1456
1457 /* CDC requires the data transfers not be done from
1458 * the default interface setting ... also, setting
1459 * the non-default interface clears filters etc.
1460 */
1461 if (wValue == 1) {
1462 usb_ep_enable (dev->in_ep, dev->in);
1463 usb_ep_enable (dev->out_ep, dev->out);
1464 dev->cdc_filter = DEFAULT_FILTER;
1465 netif_carrier_on (dev->net);
1466 if (dev->status)
1467 issue_start_status (dev);
1468 if (netif_running (dev->net)) {
1469 spin_unlock (&dev->lock);
1470 eth_start (dev, GFP_ATOMIC);
1471 spin_lock (&dev->lock);
1472 }
1473 } else {
1474 netif_stop_queue (dev->net);
1475 netif_carrier_off (dev->net);
1476 }
1477 value = 0;
1478 break;
1479 }
1480 #else
1481 /* FIXME this is wrong, as is the assumption that
1482 * all non-PXA hardware talks real CDC ...
1483 */
1484 dev_warn (&gadget->dev, "set_interface ignored!\n");
1485 #endif /* DEV_CONFIG_CDC */
1486
1487 done_set_intf:
1488 spin_unlock (&dev->lock);
1489 break;
1490 case USB_REQ_GET_INTERFACE:
1491 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)
1492 || !dev->config
1493 || wIndex > 1)
1494 break;
1495 if (!(dev->cdc || dev->rndis) && wIndex != 0)
1496 break;
1497
1498 /* for CDC, iff carrier is on, data interface is active. */
1499 if (dev->rndis || wIndex != 1)
1500 *(u8 *)req->buf = 0;
1501 else
1502 *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0;
1503 value = min (wLength, (u16) 1);
1504 break;
1505
1506 #ifdef DEV_CONFIG_CDC
1507 case USB_CDC_SET_ETHERNET_PACKET_FILTER:
1508 /* see 6.2.30: no data, wIndex = interface,
1509 * wValue = packet filter bitmap
1510 */
1511 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1512 || !dev->cdc
1513 || dev->rndis
1514 || wLength != 0
1515 || wIndex > 1)
1516 break;
1517 DEBUG (dev, "packet filter %02x\n", wValue);
1518 dev->cdc_filter = wValue;
1519 value = 0;
1520 break;
1521
1522 /* and potentially:
1523 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS:
1524 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER:
1525 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER:
1526 * case USB_CDC_GET_ETHERNET_STATISTIC:
1527 */
1528
1529 #endif /* DEV_CONFIG_CDC */
1530
1531 #ifdef CONFIG_USB_ETH_RNDIS
1532 /* RNDIS uses the CDC command encapsulation mechanism to implement
1533 * an RPC scheme, with much getting/setting of attributes by OID.
1534 */
1535 case USB_CDC_SEND_ENCAPSULATED_COMMAND:
1536 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1537 || !dev->rndis
1538 || wLength > USB_BUFSIZ
1539 || wValue
1540 || rndis_control_intf.bInterfaceNumber
1541 != wIndex)
1542 break;
1543 /* read the request, then process it */
1544 value = wLength;
1545 req->complete = rndis_command_complete;
1546 /* later, rndis_control_ack () sends a notification */
1547 break;
1548
1549 case USB_CDC_GET_ENCAPSULATED_RESPONSE:
1550 if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE)
1551 == ctrl->bRequestType
1552 && dev->rndis
1553 // && wLength >= 0x0400
1554 && !wValue
1555 && rndis_control_intf.bInterfaceNumber
1556 == wIndex) {
1557 u8 *buf;
1558
1559 /* return the result */
1560 buf = rndis_get_next_response (dev->rndis_config,
1561 &value);
1562 if (buf) {
1563 memcpy (req->buf, buf, value);
1564 req->complete = rndis_response_complete;
1565 rndis_free_response(dev->rndis_config, buf);
1566 }
1567 /* else stalls ... spec says to avoid that */
1568 }
1569 break;
1570 #endif /* RNDIS */
1571
1572 default:
1573 VDEBUG (dev,
1574 "unknown control req%02x.%02x v%04x i%04x l%d\n",
1575 ctrl->bRequestType, ctrl->bRequest,
1576 wValue, wIndex, wLength);
1577 }
1578
1579 /* respond with data transfer before status phase? */
1580 if (value >= 0) {
1581 req->length = value;
1582 req->zero = value < wLength
1583 && (value % gadget->ep0->maxpacket) == 0;
1584 value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC);
1585 if (value < 0) {
1586 DEBUG (dev, "ep_queue --> %d\n", value);
1587 req->status = 0;
1588 eth_setup_complete (gadget->ep0, req);
1589 }
1590 }
1591
1592 /* host either stalls (value < 0) or reports success */
1593 return value;
1594 }
1595
1596 static void
1597 eth_disconnect (struct usb_gadget *gadget)
1598 {
1599 struct eth_dev *dev = get_gadget_data (gadget);
1600 unsigned long flags;
1601
1602 spin_lock_irqsave (&dev->lock, flags);
1603 netif_stop_queue (dev->net);
1604 netif_carrier_off (dev->net);
1605 eth_reset_config (dev);
1606 spin_unlock_irqrestore (&dev->lock, flags);
1607
1608 /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */
1609
1610 /* next we may get setup() calls to enumerate new connections;
1611 * or an unbind() during shutdown (including removing module).
1612 */
1613 }
1614
1615 /*-------------------------------------------------------------------------*/
1616
1617 /* NETWORK DRIVER HOOKUP (to the layer above this driver) */
1618
1619 static int eth_change_mtu (struct net_device *net, int new_mtu)
1620 {
1621 struct eth_dev *dev = netdev_priv(net);
1622
1623 // FIXME if rndis, don't change while link's live
1624
1625 if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
1626 return -ERANGE;
1627 /* no zero-length packet read wanted after mtu-sized packets */
1628 if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0)
1629 return -EDOM;
1630 net->mtu = new_mtu;
1631 return 0;
1632 }
1633
1634 static struct net_device_stats *eth_get_stats (struct net_device *net)
1635 {
1636 return &((struct eth_dev *)netdev_priv(net))->stats;
1637 }
1638
1639 static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
1640 {
1641 struct eth_dev *dev = netdev_priv(net);
1642 strlcpy(p->driver, shortname, sizeof p->driver);
1643 strlcpy(p->version, DRIVER_VERSION, sizeof p->version);
1644 strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version);
1645 strlcpy (p->bus_info, dev->gadget->dev.bus_id, sizeof p->bus_info);
1646 }
1647
1648 static u32 eth_get_link(struct net_device *net)
1649 {
1650 struct eth_dev *dev = netdev_priv(net);
1651 return dev->gadget->speed != USB_SPEED_UNKNOWN;
1652 }
1653
1654 static struct ethtool_ops ops = {
1655 .get_drvinfo = eth_get_drvinfo,
1656 .get_link = eth_get_link
1657 };
1658
1659 static void defer_kevent (struct eth_dev *dev, int flag)
1660 {
1661 if (test_and_set_bit (flag, &dev->todo))
1662 return;
1663 if (!schedule_work (&dev->work))
1664 ERROR (dev, "kevent %d may have been dropped\n", flag);
1665 else
1666 DEBUG (dev, "kevent %d scheduled\n", flag);
1667 }
1668
1669 static void rx_complete (struct usb_ep *ep, struct usb_request *req);
1670
1671 static int
1672 rx_submit (struct eth_dev *dev, struct usb_request *req, int gfp_flags)
1673 {
1674 struct sk_buff *skb;
1675 int retval = -ENOMEM;
1676 size_t size;
1677
1678 /* Padding up to RX_EXTRA handles minor disagreements with host.
1679 * Normally we use the USB "terminate on short read" convention;
1680 * so allow up to (N*maxpacket), since that memory is normally
1681 * already allocated. Some hardware doesn't deal well with short
1682 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a
1683 * byte off the end (to force hardware errors on overflow).
1684 *
1685 * RNDIS uses internal framing, and explicitly allows senders to
1686 * pad to end-of-packet. That's potentially nice for speed,
1687 * but means receivers can't recover synch on their own.
1688 */
1689 size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA);
1690 size += dev->out_ep->maxpacket - 1;
1691 #ifdef CONFIG_USB_ETH_RNDIS
1692 if (dev->rndis)
1693 size += sizeof (struct rndis_packet_msg_type);
1694 #endif
1695 size -= size % dev->out_ep->maxpacket;
1696
1697 if ((skb = alloc_skb (size + NET_IP_ALIGN, gfp_flags)) == 0) {
1698 DEBUG (dev, "no rx skb\n");
1699 goto enomem;
1700 }
1701
1702 /* Some platforms perform better when IP packets are aligned,
1703 * but on at least one, checksumming fails otherwise. Note:
1704 * RNDIS headers involve variable numbers of LE32 values.
1705 */
1706 skb_reserve(skb, NET_IP_ALIGN);
1707
1708 req->buf = skb->data;
1709 req->length = size;
1710 req->complete = rx_complete;
1711 req->context = skb;
1712
1713 retval = usb_ep_queue (dev->out_ep, req, gfp_flags);
1714 if (retval == -ENOMEM)
1715 enomem:
1716 defer_kevent (dev, WORK_RX_MEMORY);
1717 if (retval) {
1718 DEBUG (dev, "rx submit --> %d\n", retval);
1719 dev_kfree_skb_any (skb);
1720 spin_lock (&dev->lock);
1721 list_add (&req->list, &dev->rx_reqs);
1722 spin_unlock (&dev->lock);
1723 }
1724 return retval;
1725 }
1726
1727 static void rx_complete (struct usb_ep *ep, struct usb_request *req)
1728 {
1729 struct sk_buff *skb = req->context;
1730 struct eth_dev *dev = ep->driver_data;
1731 int status = req->status;
1732
1733 switch (status) {
1734
1735 /* normal completion */
1736 case 0:
1737 skb_put (skb, req->actual);
1738 #ifdef CONFIG_USB_ETH_RNDIS
1739 /* we know MaxPacketsPerTransfer == 1 here */
1740 if (dev->rndis)
1741 status = rndis_rm_hdr (skb);
1742 #endif
1743 if (status < 0
1744 || ETH_HLEN > skb->len
1745 || skb->len > ETH_FRAME_LEN) {
1746 dev->stats.rx_errors++;
1747 dev->stats.rx_length_errors++;
1748 DEBUG (dev, "rx length %d\n", skb->len);
1749 break;
1750 }
1751
1752 skb->dev = dev->net;
1753 skb->protocol = eth_type_trans (skb, dev->net);
1754 dev->stats.rx_packets++;
1755 dev->stats.rx_bytes += skb->len;
1756
1757 /* no buffer copies needed, unless hardware can't
1758 * use skb buffers.
1759 */
1760 status = netif_rx (skb);
1761 skb = NULL;
1762 break;
1763
1764 /* software-driven interface shutdown */
1765 case -ECONNRESET: // unlink
1766 case -ESHUTDOWN: // disconnect etc
1767 VDEBUG (dev, "rx shutdown, code %d\n", status);
1768 goto quiesce;
1769
1770 /* for hardware automagic (such as pxa) */
1771 case -ECONNABORTED: // endpoint reset
1772 DEBUG (dev, "rx %s reset\n", ep->name);
1773 defer_kevent (dev, WORK_RX_MEMORY);
1774 quiesce:
1775 dev_kfree_skb_any (skb);
1776 goto clean;
1777
1778 /* data overrun */
1779 case -EOVERFLOW:
1780 dev->stats.rx_over_errors++;
1781 // FALLTHROUGH
1782
1783 default:
1784 dev->stats.rx_errors++;
1785 DEBUG (dev, "rx status %d\n", status);
1786 break;
1787 }
1788
1789 if (skb)
1790 dev_kfree_skb_any (skb);
1791 if (!netif_running (dev->net)) {
1792 clean:
1793 /* nobody reading rx_reqs, so no dev->lock */
1794 list_add (&req->list, &dev->rx_reqs);
1795 req = NULL;
1796 }
1797 if (req)
1798 rx_submit (dev, req, GFP_ATOMIC);
1799 }
1800
1801 static int prealloc (struct list_head *list, struct usb_ep *ep,
1802 unsigned n, int gfp_flags)
1803 {
1804 unsigned i;
1805 struct usb_request *req;
1806
1807 if (!n)
1808 return -ENOMEM;
1809
1810 /* queue/recycle up to N requests */
1811 i = n;
1812 list_for_each_entry (req, list, list) {
1813 if (i-- == 0)
1814 goto extra;
1815 }
1816 while (i--) {
1817 req = usb_ep_alloc_request (ep, gfp_flags);
1818 if (!req)
1819 return list_empty (list) ? -ENOMEM : 0;
1820 list_add (&req->list, list);
1821 }
1822 return 0;
1823
1824 extra:
1825 /* free extras */
1826 for (;;) {
1827 struct list_head *next;
1828
1829 next = req->list.next;
1830 list_del (&req->list);
1831 usb_ep_free_request (ep, req);
1832
1833 if (next == list)
1834 break;
1835
1836 req = container_of (next, struct usb_request, list);
1837 }
1838 return 0;
1839 }
1840
1841 static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags)
1842 {
1843 int status;
1844
1845 status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags);
1846 if (status < 0)
1847 goto fail;
1848 status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags);
1849 if (status < 0)
1850 goto fail;
1851 return 0;
1852 fail:
1853 DEBUG (dev, "can't alloc requests\n");
1854 return status;
1855 }
1856
1857 static void rx_fill (struct eth_dev *dev, int gfp_flags)
1858 {
1859 struct usb_request *req;
1860 unsigned long flags;
1861
1862 clear_bit (WORK_RX_MEMORY, &dev->todo);
1863
1864 /* fill unused rxq slots with some skb */
1865 spin_lock_irqsave (&dev->lock, flags);
1866 while (!list_empty (&dev->rx_reqs)) {
1867 req = container_of (dev->rx_reqs.next,
1868 struct usb_request, list);
1869 list_del_init (&req->list);
1870 spin_unlock_irqrestore (&dev->lock, flags);
1871
1872 if (rx_submit (dev, req, gfp_flags) < 0) {
1873 defer_kevent (dev, WORK_RX_MEMORY);
1874 return;
1875 }
1876
1877 spin_lock_irqsave (&dev->lock, flags);
1878 }
1879 spin_unlock_irqrestore (&dev->lock, flags);
1880 }
1881
1882 static void eth_work (void *_dev)
1883 {
1884 struct eth_dev *dev = _dev;
1885
1886 if (test_bit (WORK_RX_MEMORY, &dev->todo)) {
1887 if (netif_running (dev->net))
1888 rx_fill (dev, GFP_KERNEL);
1889 else
1890 clear_bit (WORK_RX_MEMORY, &dev->todo);
1891 }
1892
1893 if (dev->todo)
1894 DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo);
1895 }
1896
1897 static void tx_complete (struct usb_ep *ep, struct usb_request *req)
1898 {
1899 struct sk_buff *skb = req->context;
1900 struct eth_dev *dev = ep->driver_data;
1901
1902 switch (req->status) {
1903 default:
1904 dev->stats.tx_errors++;
1905 VDEBUG (dev, "tx err %d\n", req->status);
1906 /* FALLTHROUGH */
1907 case -ECONNRESET: // unlink
1908 case -ESHUTDOWN: // disconnect etc
1909 break;
1910 case 0:
1911 dev->stats.tx_bytes += skb->len;
1912 }
1913 dev->stats.tx_packets++;
1914
1915 spin_lock (&dev->lock);
1916 list_add (&req->list, &dev->tx_reqs);
1917 spin_unlock (&dev->lock);
1918 dev_kfree_skb_any (skb);
1919
1920 atomic_dec (&dev->tx_qlen);
1921 if (netif_carrier_ok (dev->net))
1922 netif_wake_queue (dev->net);
1923 }
1924
1925 static inline int eth_is_promisc (struct eth_dev *dev)
1926 {
1927 /* no filters for the CDC subset; always promisc */
1928 if (subset_active (dev))
1929 return 1;
1930 return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
1931 }
1932
1933 static int eth_start_xmit (struct sk_buff *skb, struct net_device *net)
1934 {
1935 struct eth_dev *dev = netdev_priv(net);
1936 int length = skb->len;
1937 int retval;
1938 struct usb_request *req = NULL;
1939 unsigned long flags;
1940
1941 /* apply outgoing CDC or RNDIS filters */
1942 if (!eth_is_promisc (dev)) {
1943 u8 *dest = skb->data;
1944
1945 if (dest [0] & 0x01) {
1946 u16 type;
1947
1948 /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
1949 * SET_ETHERNET_MULTICAST_FILTERS requests
1950 */
1951 if (memcmp (dest, net->broadcast, ETH_ALEN) == 0)
1952 type = USB_CDC_PACKET_TYPE_BROADCAST;
1953 else
1954 type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
1955 if (!(dev->cdc_filter & type)) {
1956 dev_kfree_skb_any (skb);
1957 return 0;
1958 }
1959 }
1960 /* ignores USB_CDC_PACKET_TYPE_DIRECTED */
1961 }
1962
1963 spin_lock_irqsave (&dev->lock, flags);
1964 req = container_of (dev->tx_reqs.next, struct usb_request, list);
1965 list_del (&req->list);
1966 if (list_empty (&dev->tx_reqs))
1967 netif_stop_queue (net);
1968 spin_unlock_irqrestore (&dev->lock, flags);
1969
1970 /* no buffer copies needed, unless the network stack did it
1971 * or the hardware can't use skb buffers.
1972 * or there's not enough space for any RNDIS headers we need
1973 */
1974 #ifdef CONFIG_USB_ETH_RNDIS
1975 if (dev->rndis) {
1976 struct sk_buff *skb_rndis;
1977
1978 skb_rndis = skb_realloc_headroom (skb,
1979 sizeof (struct rndis_packet_msg_type));
1980 if (!skb_rndis)
1981 goto drop;
1982
1983 dev_kfree_skb_any (skb);
1984 skb = skb_rndis;
1985 rndis_add_hdr (skb);
1986 length = skb->len;
1987 }
1988 #endif
1989 req->buf = skb->data;
1990 req->context = skb;
1991 req->complete = tx_complete;
1992
1993 /* use zlp framing on tx for strict CDC-Ether conformance,
1994 * though any robust network rx path ignores extra padding.
1995 * and some hardware doesn't like to write zlps.
1996 */
1997 req->zero = 1;
1998 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0)
1999 length++;
2000
2001 req->length = length;
2002
2003 #ifdef CONFIG_USB_GADGET_DUALSPEED
2004 /* throttle highspeed IRQ rate back slightly */
2005 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH)
2006 ? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0)
2007 : 0;
2008 #endif
2009
2010 retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC);
2011 switch (retval) {
2012 default:
2013 DEBUG (dev, "tx queue err %d\n", retval);
2014 break;
2015 case 0:
2016 net->trans_start = jiffies;
2017 atomic_inc (&dev->tx_qlen);
2018 }
2019
2020 if (retval) {
2021 #ifdef CONFIG_USB_ETH_RNDIS
2022 drop:
2023 #endif
2024 dev->stats.tx_dropped++;
2025 dev_kfree_skb_any (skb);
2026 spin_lock_irqsave (&dev->lock, flags);
2027 if (list_empty (&dev->tx_reqs))
2028 netif_start_queue (net);
2029 list_add (&req->list, &dev->tx_reqs);
2030 spin_unlock_irqrestore (&dev->lock, flags);
2031 }
2032 return 0;
2033 }
2034
2035 /*-------------------------------------------------------------------------*/
2036
2037 #ifdef CONFIG_USB_ETH_RNDIS
2038
2039 static void rndis_send_media_state (struct eth_dev *dev, int connect)
2040 {
2041 if (!dev)
2042 return;
2043
2044 if (connect) {
2045 if (rndis_signal_connect (dev->rndis_config))
2046 return;
2047 } else {
2048 if (rndis_signal_disconnect (dev->rndis_config))
2049 return;
2050 }
2051 }
2052
2053 static void
2054 rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req)
2055 {
2056 if (req->status || req->actual != req->length)
2057 DEBUG ((struct eth_dev *) ep->driver_data,
2058 "rndis control ack complete --> %d, %d/%d\n",
2059 req->status, req->actual, req->length);
2060 }
2061
2062 static int rndis_control_ack (struct net_device *net)
2063 {
2064 struct eth_dev *dev = netdev_priv(net);
2065 u32 length;
2066 struct usb_request *resp = dev->stat_req;
2067
2068 /* in case RNDIS calls this after disconnect */
2069 if (!dev->status) {
2070 DEBUG (dev, "status ENODEV\n");
2071 return -ENODEV;
2072 }
2073
2074 /* Send RNDIS RESPONSE_AVAILABLE notification;
2075 * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too
2076 */
2077 resp->length = 8;
2078 resp->complete = rndis_control_ack_complete;
2079
2080 *((__le32 *) resp->buf) = __constant_cpu_to_le32 (1);
2081 *((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0);
2082
2083 length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC);
2084 if (length < 0) {
2085 resp->status = 0;
2086 rndis_control_ack_complete (dev->status_ep, resp);
2087 }
2088
2089 return 0;
2090 }
2091
2092 #endif /* RNDIS */
2093
2094 static void eth_start (struct eth_dev *dev, int gfp_flags)
2095 {
2096 DEBUG (dev, "%s\n", __FUNCTION__);
2097
2098 /* fill the rx queue */
2099 rx_fill (dev, gfp_flags);
2100
2101 /* and open the tx floodgates */
2102 atomic_set (&dev->tx_qlen, 0);
2103 netif_wake_queue (dev->net);
2104 #ifdef CONFIG_USB_ETH_RNDIS
2105 if (dev->rndis) {
2106 rndis_set_param_medium (dev->rndis_config,
2107 NDIS_MEDIUM_802_3,
2108 BITRATE(dev->gadget)/100);
2109 rndis_send_media_state (dev, 1);
2110 }
2111 #endif
2112 }
2113
2114 static int eth_open (struct net_device *net)
2115 {
2116 struct eth_dev *dev = netdev_priv(net);
2117
2118 DEBUG (dev, "%s\n", __FUNCTION__);
2119 if (netif_carrier_ok (dev->net))
2120 eth_start (dev, GFP_KERNEL);
2121 return 0;
2122 }
2123
2124 static int eth_stop (struct net_device *net)
2125 {
2126 struct eth_dev *dev = netdev_priv(net);
2127
2128 VDEBUG (dev, "%s\n", __FUNCTION__);
2129 netif_stop_queue (net);
2130
2131 DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
2132 dev->stats.rx_packets, dev->stats.tx_packets,
2133 dev->stats.rx_errors, dev->stats.tx_errors
2134 );
2135
2136 /* ensure there are no more active requests */
2137 if (dev->config) {
2138 usb_ep_disable (dev->in_ep);
2139 usb_ep_disable (dev->out_ep);
2140 if (netif_carrier_ok (dev->net)) {
2141 DEBUG (dev, "host still using in/out endpoints\n");
2142 // FIXME idiom may leave toggle wrong here
2143 usb_ep_enable (dev->in_ep, dev->in);
2144 usb_ep_enable (dev->out_ep, dev->out);
2145 }
2146 if (dev->status_ep) {
2147 usb_ep_disable (dev->status_ep);
2148 usb_ep_enable (dev->status_ep, dev->status);
2149 }
2150 }
2151
2152 #ifdef CONFIG_USB_ETH_RNDIS
2153 if (dev->rndis) {
2154 rndis_set_param_medium (dev->rndis_config,
2155 NDIS_MEDIUM_802_3, 0);
2156 rndis_send_media_state (dev, 0);
2157 }
2158 #endif
2159
2160 return 0;
2161 }
2162
2163 /*-------------------------------------------------------------------------*/
2164
2165 static struct usb_request *eth_req_alloc (struct usb_ep *ep, unsigned size)
2166 {
2167 struct usb_request *req;
2168
2169 req = usb_ep_alloc_request (ep, GFP_KERNEL);
2170 if (!req)
2171 return NULL;
2172
2173 req->buf = kmalloc (size, GFP_KERNEL);
2174 if (!req->buf) {
2175 usb_ep_free_request (ep, req);
2176 req = NULL;
2177 }
2178 return req;
2179 }
2180
2181 static void
2182 eth_req_free (struct usb_ep *ep, struct usb_request *req)
2183 {
2184 kfree (req->buf);
2185 usb_ep_free_request (ep, req);
2186 }
2187
2188
2189 static void
2190 eth_unbind (struct usb_gadget *gadget)
2191 {
2192 struct eth_dev *dev = get_gadget_data (gadget);
2193
2194 DEBUG (dev, "unbind\n");
2195 #ifdef CONFIG_USB_ETH_RNDIS
2196 rndis_deregister (dev->rndis_config);
2197 rndis_exit ();
2198 #endif
2199
2200 /* we've already been disconnected ... no i/o is active */
2201 if (dev->req) {
2202 eth_req_free (gadget->ep0, dev->req);
2203 dev->req = NULL;
2204 }
2205 if (dev->stat_req) {
2206 eth_req_free (dev->status_ep, dev->stat_req);
2207 dev->stat_req = NULL;
2208 }
2209
2210 unregister_netdev (dev->net);
2211 free_netdev(dev->net);
2212
2213 /* assuming we used keventd, it must quiesce too */
2214 flush_scheduled_work ();
2215 set_gadget_data (gadget, NULL);
2216 }
2217
2218 static u8 __init nibble (unsigned char c)
2219 {
2220 if (likely (isdigit (c)))
2221 return c - '0';
2222 c = toupper (c);
2223 if (likely (isxdigit (c)))
2224 return 10 + c - 'A';
2225 return 0;
2226 }
2227
2228 static void __init get_ether_addr (const char *str, u8 *dev_addr)
2229 {
2230 if (str) {
2231 unsigned i;
2232
2233 for (i = 0; i < 6; i++) {
2234 unsigned char num;
2235
2236 if((*str == '.') || (*str == ':'))
2237 str++;
2238 num = nibble(*str++) << 4;
2239 num |= (nibble(*str++));
2240 dev_addr [i] = num;
2241 }
2242 if (is_valid_ether_addr (dev_addr))
2243 return;
2244 }
2245 random_ether_addr(dev_addr);
2246 }
2247
2248 static int __init
2249 eth_bind (struct usb_gadget *gadget)
2250 {
2251 struct eth_dev *dev;
2252 struct net_device *net;
2253 u8 cdc = 1, zlp = 1, rndis = 1;
2254 struct usb_ep *in_ep, *out_ep, *status_ep = NULL;
2255 int status = -ENOMEM;
2256
2257 /* these flags are only ever cleared; compiler take note */
2258 #ifndef DEV_CONFIG_CDC
2259 cdc = 0;
2260 #endif
2261 #ifndef CONFIG_USB_ETH_RNDIS
2262 rndis = 0;
2263 #endif
2264
2265 /* Because most host side USB stacks handle CDC Ethernet, that
2266 * standard protocol is _strongly_ preferred for interop purposes.
2267 * (By everyone except Microsoft.)
2268 */
2269 if (gadget_is_net2280 (gadget)) {
2270 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201);
2271 } else if (gadget_is_dummy (gadget)) {
2272 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0202);
2273 } else if (gadget_is_pxa (gadget)) {
2274 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203);
2275 /* pxa doesn't support altsettings */
2276 cdc = 0;
2277 } else if (gadget_is_sh(gadget)) {
2278 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204);
2279 /* sh doesn't support multiple interfaces or configs */
2280 cdc = 0;
2281 rndis = 0;
2282 } else if (gadget_is_sa1100 (gadget)) {
2283 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205);
2284 /* hardware can't write zlps */
2285 zlp = 0;
2286 /* sa1100 CAN do CDC, without status endpoint ... we use
2287 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth".
2288 */
2289 cdc = 0;
2290 } else if (gadget_is_goku (gadget)) {
2291 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206);
2292 } else if (gadget_is_mq11xx (gadget)) {
2293 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207);
2294 } else if (gadget_is_omap (gadget)) {
2295 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208);
2296 } else if (gadget_is_lh7a40x(gadget)) {
2297 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0209);
2298 } else if (gadget_is_n9604(gadget)) {
2299 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210);
2300 } else if (gadget_is_pxa27x(gadget)) {
2301 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211);
2302 } else if (gadget_is_s3c2410(gadget)) {
2303 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212);
2304 } else if (gadget_is_at91(gadget)) {
2305 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213);
2306 } else {
2307 /* can't assume CDC works. don't want to default to
2308 * anything less functional on CDC-capable hardware,
2309 * so we fail in this case.
2310 */
2311 dev_err (&gadget->dev,
2312 "controller '%s' not recognized\n",
2313 gadget->name);
2314 return -ENODEV;
2315 }
2316 snprintf (manufacturer, sizeof manufacturer, "%s %s/%s",
2317 system_utsname.sysname, system_utsname.release,
2318 gadget->name);
2319
2320 /* If there's an RNDIS configuration, that's what Windows wants to
2321 * be using ... so use these product IDs here and in the "linux.inf"
2322 * needed to install MSFT drivers. Current Linux kernels will use
2323 * the second configuration if it's CDC Ethernet, and need some help
2324 * to choose the right configuration otherwise.
2325 */
2326 if (rndis) {
2327 device_desc.idVendor =
2328 __constant_cpu_to_le16(RNDIS_VENDOR_NUM);
2329 device_desc.idProduct =
2330 __constant_cpu_to_le16(RNDIS_PRODUCT_NUM);
2331 snprintf (product_desc, sizeof product_desc,
2332 "RNDIS/%s", driver_desc);
2333
2334 /* CDC subset ... recognized by Linux since 2.4.10, but Windows
2335 * drivers aren't widely available.
2336 */
2337 } else if (!cdc) {
2338 device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC;
2339 device_desc.idVendor =
2340 __constant_cpu_to_le16(SIMPLE_VENDOR_NUM);
2341 device_desc.idProduct =
2342 __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM);
2343 }
2344
2345 /* support optional vendor/distro customization */
2346 if (idVendor) {
2347 if (!idProduct) {
2348 dev_err (&gadget->dev, "idVendor needs idProduct!\n");
2349 return -ENODEV;
2350 }
2351 device_desc.idVendor = cpu_to_le16(idVendor);
2352 device_desc.idProduct = cpu_to_le16(idProduct);
2353 if (bcdDevice)
2354 device_desc.bcdDevice = cpu_to_le16(bcdDevice);
2355 }
2356 if (iManufacturer)
2357 strlcpy (manufacturer, iManufacturer, sizeof manufacturer);
2358 if (iProduct)
2359 strlcpy (product_desc, iProduct, sizeof product_desc);
2360
2361 /* all we really need is bulk IN/OUT */
2362 usb_ep_autoconfig_reset (gadget);
2363 in_ep = usb_ep_autoconfig (gadget, &fs_source_desc);
2364 if (!in_ep) {
2365 autoconf_fail:
2366 dev_err (&gadget->dev,
2367 "can't autoconfigure on %s\n",
2368 gadget->name);
2369 return -ENODEV;
2370 }
2371 EP_IN_NAME = in_ep->name;
2372 in_ep->driver_data = in_ep; /* claim */
2373
2374 out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc);
2375 if (!out_ep)
2376 goto autoconf_fail;
2377 EP_OUT_NAME = out_ep->name;
2378 out_ep->driver_data = out_ep; /* claim */
2379
2380 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
2381 /* CDC Ethernet control interface doesn't require a status endpoint.
2382 * Since some hosts expect one, try to allocate one anyway.
2383 */
2384 if (cdc || rndis) {
2385 status_ep = usb_ep_autoconfig (gadget, &fs_status_desc);
2386 if (status_ep) {
2387 EP_STATUS_NAME = status_ep->name;
2388 status_ep->driver_data = status_ep; /* claim */
2389 } else if (rndis) {
2390 dev_err (&gadget->dev,
2391 "can't run RNDIS on %s\n",
2392 gadget->name);
2393 return -ENODEV;
2394 #ifdef DEV_CONFIG_CDC
2395 /* pxa25x only does CDC subset; often used with RNDIS */
2396 } else if (cdc) {
2397 control_intf.bNumEndpoints = 0;
2398 /* FIXME remove endpoint from descriptor list */
2399 #endif
2400 }
2401 }
2402 #endif
2403
2404 /* one config: cdc, else minimal subset */
2405 if (!cdc) {
2406 eth_config.bNumInterfaces = 1;
2407 eth_config.iConfiguration = STRING_SUBSET;
2408 fs_subset_descriptors();
2409 hs_subset_descriptors();
2410 }
2411
2412 /* For now RNDIS is always a second config */
2413 if (rndis)
2414 device_desc.bNumConfigurations = 2;
2415
2416 #ifdef CONFIG_USB_GADGET_DUALSPEED
2417 if (rndis)
2418 dev_qualifier.bNumConfigurations = 2;
2419 else if (!cdc)
2420 dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC;
2421
2422 /* assumes ep0 uses the same value for both speeds ... */
2423 dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0;
2424
2425 /* and that all endpoints are dual-speed */
2426 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
2427 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
2428 #if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS)
2429 if (EP_STATUS_NAME)
2430 hs_status_desc.bEndpointAddress =
2431 fs_status_desc.bEndpointAddress;
2432 #endif
2433 #endif /* DUALSPEED */
2434
2435 device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket;
2436 usb_gadget_set_selfpowered (gadget);
2437
2438 if (gadget->is_otg) {
2439 otg_descriptor.bmAttributes |= USB_OTG_HNP,
2440 eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2441 eth_config.bMaxPower = 4;
2442 #ifdef CONFIG_USB_ETH_RNDIS
2443 rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
2444 rndis_config.bMaxPower = 4;
2445 #endif
2446 }
2447
2448 net = alloc_etherdev (sizeof *dev);
2449 if (!net)
2450 return status;
2451 dev = netdev_priv(net);
2452 spin_lock_init (&dev->lock);
2453 INIT_WORK (&dev->work, eth_work, dev);
2454 INIT_LIST_HEAD (&dev->tx_reqs);
2455 INIT_LIST_HEAD (&dev->rx_reqs);
2456
2457 /* network device setup */
2458 dev->net = net;
2459 SET_MODULE_OWNER (net);
2460 strcpy (net->name, "usb%d");
2461 dev->cdc = cdc;
2462 dev->zlp = zlp;
2463
2464 dev->in_ep = in_ep;
2465 dev->out_ep = out_ep;
2466 dev->status_ep = status_ep;
2467
2468 /* Module params for these addresses should come from ID proms.
2469 * The host side address is used with CDC and RNDIS, and commonly
2470 * ends up in a persistent config database.
2471 */
2472 get_ether_addr(dev_addr, net->dev_addr);
2473 if (cdc || rndis) {
2474 get_ether_addr(host_addr, dev->host_mac);
2475 #ifdef DEV_CONFIG_CDC
2476 snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X",
2477 dev->host_mac [0], dev->host_mac [1],
2478 dev->host_mac [2], dev->host_mac [3],
2479 dev->host_mac [4], dev->host_mac [5]);
2480 #endif
2481 }
2482
2483 if (rndis) {
2484 status = rndis_init();
2485 if (status < 0) {
2486 dev_err (&gadget->dev, "can't init RNDIS, %d\n",
2487 status);
2488 goto fail;
2489 }
2490 }
2491
2492 net->change_mtu = eth_change_mtu;
2493 net->get_stats = eth_get_stats;
2494 net->hard_start_xmit = eth_start_xmit;
2495 net->open = eth_open;
2496 net->stop = eth_stop;
2497 // watchdog_timeo, tx_timeout ...
2498 // set_multicast_list
2499 SET_ETHTOOL_OPS(net, &ops);
2500
2501 /* preallocate control message data and buffer */
2502 dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ);
2503 if (!dev->req)
2504 goto fail;
2505 dev->req->complete = eth_setup_complete;
2506
2507 /* ... and maybe likewise for status transfer */
2508 if (dev->status_ep) {
2509 dev->stat_req = eth_req_alloc (dev->status_ep,
2510 STATUS_BYTECOUNT);
2511 if (!dev->stat_req) {
2512 eth_req_free (gadget->ep0, dev->req);
2513 goto fail;
2514 }
2515 }
2516
2517 /* finish hookup to lower layer ... */
2518 dev->gadget = gadget;
2519 set_gadget_data (gadget, dev);
2520 gadget->ep0->driver_data = dev;
2521
2522 /* two kinds of host-initiated state changes:
2523 * - iff DATA transfer is active, carrier is "on"
2524 * - tx queueing enabled if open *and* carrier is "on"
2525 */
2526 netif_stop_queue (dev->net);
2527 netif_carrier_off (dev->net);
2528
2529 // SET_NETDEV_DEV (dev->net, &gadget->dev);
2530 status = register_netdev (dev->net);
2531 if (status < 0)
2532 goto fail1;
2533
2534 INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc);
2535 INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name,
2536 EP_OUT_NAME, EP_IN_NAME,
2537 EP_STATUS_NAME ? " STATUS " : "",
2538 EP_STATUS_NAME ? EP_STATUS_NAME : ""
2539 );
2540 INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2541 net->dev_addr [0], net->dev_addr [1],
2542 net->dev_addr [2], net->dev_addr [3],
2543 net->dev_addr [4], net->dev_addr [5]);
2544
2545 if (cdc || rndis)
2546 INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
2547 dev->host_mac [0], dev->host_mac [1],
2548 dev->host_mac [2], dev->host_mac [3],
2549 dev->host_mac [4], dev->host_mac [5]);
2550
2551 #ifdef CONFIG_USB_ETH_RNDIS
2552 if (rndis) {
2553 u32 vendorID = 0;
2554
2555 /* FIXME RNDIS vendor id == "vendor NIC code" == ? */
2556
2557 dev->rndis_config = rndis_register (rndis_control_ack);
2558 if (dev->rndis_config < 0) {
2559 fail0:
2560 unregister_netdev (dev->net);
2561 status = -ENODEV;
2562 goto fail;
2563 }
2564
2565 /* these set up a lot of the OIDs that RNDIS needs */
2566 rndis_set_host_mac (dev->rndis_config, dev->host_mac);
2567 if (rndis_set_param_dev (dev->rndis_config, dev->net,
2568 &dev->stats))
2569 goto fail0;
2570 if (rndis_set_param_vendor (dev->rndis_config, vendorID,
2571 manufacturer))
2572 goto fail0;
2573 if (rndis_set_param_medium (dev->rndis_config,
2574 NDIS_MEDIUM_802_3,
2575 0))
2576 goto fail0;
2577 INFO (dev, "RNDIS ready\n");
2578 }
2579 #endif
2580
2581 return status;
2582
2583 fail1:
2584 dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status);
2585 fail:
2586 eth_unbind (gadget);
2587 return status;
2588 }
2589
2590 /*-------------------------------------------------------------------------*/
2591
2592 static void
2593 eth_suspend (struct usb_gadget *gadget)
2594 {
2595 struct eth_dev *dev = get_gadget_data (gadget);
2596
2597 DEBUG (dev, "suspend\n");
2598 dev->suspended = 1;
2599 }
2600
2601 static void
2602 eth_resume (struct usb_gadget *gadget)
2603 {
2604 struct eth_dev *dev = get_gadget_data (gadget);
2605
2606 DEBUG (dev, "resume\n");
2607 dev->suspended = 0;
2608 }
2609
2610 /*-------------------------------------------------------------------------*/
2611
2612 static struct usb_gadget_driver eth_driver = {
2613 #ifdef CONFIG_USB_GADGET_DUALSPEED
2614 .speed = USB_SPEED_HIGH,
2615 #else
2616 .speed = USB_SPEED_FULL,
2617 #endif
2618 .function = (char *) driver_desc,
2619 .bind = eth_bind,
2620 .unbind = eth_unbind,
2621
2622 .setup = eth_setup,
2623 .disconnect = eth_disconnect,
2624
2625 .suspend = eth_suspend,
2626 .resume = eth_resume,
2627
2628 .driver = {
2629 .name = (char *) shortname,
2630 // .shutdown = ...
2631 // .suspend = ...
2632 // .resume = ...
2633 },
2634 };
2635
2636 MODULE_DESCRIPTION (DRIVER_DESC);
2637 MODULE_AUTHOR ("David Brownell, Benedikt Spanger");
2638 MODULE_LICENSE ("GPL");
2639
2640
2641 static int __init init (void)
2642 {
2643 return usb_gadget_register_driver (&eth_driver);
2644 }
2645 module_init (init);
2646
2647 static void __exit cleanup (void)
2648 {
2649 usb_gadget_unregister_driver (&eth_driver);
2650 }
2651 module_exit (cleanup);
2652
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