1 /* 2 * ether.c -- Ethernet gadget driver, with CDC and non-CDC options 3 * 4 * Copyright (C) 2003-2005,2008 David Brownell 5 * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger 6 * Copyright (C) 2008 Nokia Corporation 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 #include <common.h> 24 #include <asm/errno.h> 25 #include <linux/netdevice.h> 26 #include <linux/usb/ch9.h> 27 #include <linux/usb/cdc.h> 28 #include <linux/usb/gadget.h> 29 #include <net.h> 30 #include <linux/ctype.h> 31 32 #include "gadget_chips.h" 33 34 #define USB_NET_NAME "usb_ether" 35 36 #define atomic_read 37 extern struct platform_data brd; 38 #define spin_lock(x) 39 #define spin_unlock(x) 40 41 42 unsigned packet_received, packet_sent; 43 44 #define DEV_CONFIG_CDC 1 45 #define GFP_ATOMIC ((gfp_t) 0) 46 #define GFP_KERNEL ((gfp_t) 0) 47 48 /* 49 * Ethernet gadget driver -- with CDC and non-CDC options 50 * Builds on hardware support for a full duplex link. 51 * 52 * CDC Ethernet is the standard USB solution for sending Ethernet frames 53 * using USB. Real hardware tends to use the same framing protocol but look 54 * different for control features. This driver strongly prefers to use 55 * this USB-IF standard as its open-systems interoperability solution; 56 * most host side USB stacks (except from Microsoft) support it. 57 * 58 * This is sometimes called "CDC ECM" (Ethernet Control Model) to support 59 * TLA-soup. "CDC ACM" (Abstract Control Model) is for modems, and a new 60 * "CDC EEM" (Ethernet Emulation Model) is starting to spread. 61 * 62 * There's some hardware that can't talk CDC ECM. We make that hardware 63 * implement a "minimalist" vendor-agnostic CDC core: same framing, but 64 * link-level setup only requires activating the configuration. Only the 65 * endpoint descriptors, and product/vendor IDs, are relevant; no control 66 * operations are available. Linux supports it, but other host operating 67 * systems may not. (This is a subset of CDC Ethernet.) 68 * 69 * It turns out that if you add a few descriptors to that "CDC Subset", 70 * (Windows) host side drivers from MCCI can treat it as one submode of 71 * a proprietary scheme called "SAFE" ... without needing to know about 72 * specific product/vendor IDs. So we do that, making it easier to use 73 * those MS-Windows drivers. Those added descriptors make it resemble a 74 * CDC MDLM device, but they don't change device behavior at all. (See 75 * MCCI Engineering report 950198 "SAFE Networking Functions".) 76 * 77 * A third option is also in use. Rather than CDC Ethernet, or something 78 * simpler, Microsoft pushes their own approach: RNDIS. The published 79 * RNDIS specs are ambiguous and appear to be incomplete, and are also 80 * needlessly complex. They borrow more from CDC ACM than CDC ECM. 81 */ 82 #define ETH_ALEN 6 /* Octets in one ethernet addr */ 83 #define ETH_HLEN 14 /* Total octets in header. */ 84 #define ETH_ZLEN 60 /* Min. octets in frame sans FCS */ 85 #define ETH_DATA_LEN 1500 /* Max. octets in payload */ 86 #define ETH_FRAME_LEN PKTSIZE_ALIGN /* Max. octets in frame sans FCS */ 87 #define ETH_FCS_LEN 4 /* Octets in the FCS */ 88 89 #define DRIVER_DESC "Ethernet Gadget" 90 /* Based on linux 2.6.27 version */ 91 #define DRIVER_VERSION "May Day 2005" 92 93 static const char shortname[] = "ether"; 94 static const char driver_desc[] = DRIVER_DESC; 95 96 #define RX_EXTRA 20 /* guard against rx overflows */ 97 98 /* CDC support the same host-chosen outgoing packet filters. */ 99 #define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ 100 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ 101 |USB_CDC_PACKET_TYPE_PROMISCUOUS \ 102 |USB_CDC_PACKET_TYPE_DIRECTED) 103 104 #define USB_CONNECT_TIMEOUT (3 * CONFIG_SYS_HZ) 105 106 /*-------------------------------------------------------------------------*/ 107 108 struct eth_dev { 109 struct usb_gadget *gadget; 110 struct usb_request *req; /* for control responses */ 111 struct usb_request *stat_req; /* for cdc status */ 112 113 u8 config; 114 struct usb_ep *in_ep, *out_ep, *status_ep; 115 const struct usb_endpoint_descriptor 116 *in, *out, *status; 117 118 struct usb_request *tx_req, *rx_req; 119 120 struct eth_device *net; 121 struct net_device_stats stats; 122 unsigned int tx_qlen; 123 124 unsigned zlp:1; 125 unsigned cdc:1; 126 unsigned suspended:1; 127 unsigned network_started:1; 128 u16 cdc_filter; 129 unsigned long todo; 130 int mtu; 131 #define WORK_RX_MEMORY 0 132 u8 host_mac[ETH_ALEN]; 133 }; 134 135 /* 136 * This version autoconfigures as much as possible at run-time. 137 * 138 * It also ASSUMES a self-powered device, without remote wakeup, 139 * although remote wakeup support would make sense. 140 */ 141 142 /*-------------------------------------------------------------------------*/ 143 static struct eth_dev l_ethdev; 144 static struct eth_device l_netdev; 145 static struct usb_gadget_driver eth_driver; 146 147 /*-------------------------------------------------------------------------*/ 148 149 /* "main" config is either CDC, or its simple subset */ 150 static inline int is_cdc(struct eth_dev *dev) 151 { 152 #if !defined(DEV_CONFIG_SUBSET) 153 return 1; /* only cdc possible */ 154 #elif !defined(DEV_CONFIG_CDC) 155 return 0; /* only subset possible */ 156 #else 157 return dev->cdc; /* depends on what hardware we found */ 158 #endif 159 } 160 161 #define subset_active(dev) (!is_cdc(dev)) 162 #define cdc_active(dev) (is_cdc(dev)) 163 164 #define DEFAULT_QLEN 2 /* double buffering by default */ 165 166 /* peak bulk transfer bits-per-second */ 167 #define HS_BPS (13 * 512 * 8 * 1000 * 8) 168 #define FS_BPS (19 * 64 * 1 * 1000 * 8) 169 170 #ifdef CONFIG_USB_GADGET_DUALSPEED 171 #define DEVSPEED USB_SPEED_HIGH 172 173 #ifdef CONFIG_USB_ETH_QMULT 174 #define qmult CONFIG_USB_ETH_QMULT 175 #else 176 #define qmult 5 177 #endif 178 179 /* for dual-speed hardware, use deeper queues at highspeed */ 180 #define qlen(gadget) \ 181 (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1)) 182 183 static inline int BITRATE(struct usb_gadget *g) 184 { 185 return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS; 186 } 187 188 #else /* full speed (low speed doesn't do bulk) */ 189 190 #define qmult 1 191 192 #define DEVSPEED USB_SPEED_FULL 193 194 #define qlen(gadget) DEFAULT_QLEN 195 196 static inline int BITRATE(struct usb_gadget *g) 197 { 198 return FS_BPS; 199 } 200 #endif 201 202 /*-------------------------------------------------------------------------*/ 203 204 /* 205 * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! 206 * Instead: allocate your own, using normal USB-IF procedures. 207 */ 208 209 /* 210 * Thanks to NetChip Technologies for donating this product ID. 211 * It's for devices with only CDC Ethernet configurations. 212 */ 213 #define CDC_VENDOR_NUM 0x0525 /* NetChip */ 214 #define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */ 215 216 /* 217 * For hardware that can't talk CDC, we use the same vendor ID that 218 * ARM Linux has used for ethernet-over-usb, both with sa1100 and 219 * with pxa250. We're protocol-compatible, if the host-side drivers 220 * use the endpoint descriptors. bcdDevice (version) is nonzero, so 221 * drivers that need to hard-wire endpoint numbers have a hook. 222 * 223 * The protocol is a minimal subset of CDC Ether, which works on any bulk 224 * hardware that's not deeply broken ... even on hardware that can't talk 225 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that 226 * doesn't handle control-OUT). 227 */ 228 #define SIMPLE_VENDOR_NUM 0x049f 229 #define SIMPLE_PRODUCT_NUM 0x505a 230 231 /* 232 * Some systems will want different product identifers published in the 233 * device descriptor, either numbers or strings or both. These string 234 * parameters are in UTF-8 (superset of ASCII's 7 bit characters). 235 */ 236 237 static ushort bcdDevice; 238 #if defined(CONFIG_USBNET_MANUFACTURER) 239 static char *iManufacturer = CONFIG_USBNET_MANUFACTURER; 240 #else 241 static char *iManufacturer = "U-boot"; 242 #endif 243 static char *iProduct; 244 static char *iSerialNumber; 245 static char dev_addr[18]; 246 static char host_addr[18]; 247 248 /*-------------------------------------------------------------------------*/ 249 250 /* 251 * USB DRIVER HOOKUP (to the hardware driver, below us), mostly 252 * ep0 implementation: descriptors, config management, setup(). 253 * also optional class-specific notification interrupt transfer. 254 */ 255 256 /* 257 * DESCRIPTORS ... most are static, but strings and (full) configuration 258 * descriptors are built on demand. For now we do either full CDC, or 259 * our simple subset. 260 */ 261 262 #define STRING_MANUFACTURER 1 263 #define STRING_PRODUCT 2 264 #define STRING_ETHADDR 3 265 #define STRING_DATA 4 266 #define STRING_CONTROL 5 267 #define STRING_CDC 7 268 #define STRING_SUBSET 8 269 #define STRING_SERIALNUMBER 10 270 271 /* holds our biggest descriptor */ 272 #define USB_BUFSIZ 256 273 274 /* 275 * This device advertises one configuration, eth_config, 276 * on hardware supporting at least two configs. 277 * 278 * FIXME define some higher-powered configurations to make it easier 279 * to recharge batteries ... 280 */ 281 282 #define DEV_CONFIG_VALUE 1 /* cdc or subset */ 283 284 static struct usb_device_descriptor 285 device_desc = { 286 .bLength = sizeof device_desc, 287 .bDescriptorType = USB_DT_DEVICE, 288 289 .bcdUSB = __constant_cpu_to_le16(0x0200), 290 291 .bDeviceClass = USB_CLASS_COMM, 292 .bDeviceSubClass = 0, 293 .bDeviceProtocol = 0, 294 295 .idVendor = __constant_cpu_to_le16(CDC_VENDOR_NUM), 296 .idProduct = __constant_cpu_to_le16(CDC_PRODUCT_NUM), 297 .iManufacturer = STRING_MANUFACTURER, 298 .iProduct = STRING_PRODUCT, 299 .bNumConfigurations = 1, 300 }; 301 302 static struct usb_otg_descriptor 303 otg_descriptor = { 304 .bLength = sizeof otg_descriptor, 305 .bDescriptorType = USB_DT_OTG, 306 307 .bmAttributes = USB_OTG_SRP, 308 }; 309 310 static struct usb_config_descriptor 311 eth_config = { 312 .bLength = sizeof eth_config, 313 .bDescriptorType = USB_DT_CONFIG, 314 315 /* compute wTotalLength on the fly */ 316 .bNumInterfaces = 2, 317 .bConfigurationValue = DEV_CONFIG_VALUE, 318 .iConfiguration = STRING_CDC, 319 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 320 .bMaxPower = 1, 321 }; 322 323 /* 324 * Compared to the simple CDC subset, the full CDC Ethernet model adds 325 * three class descriptors, two interface descriptors, optional status 326 * endpoint. Both have a "data" interface and two bulk endpoints. 327 * There are also differences in how control requests are handled. 328 */ 329 330 #ifdef DEV_CONFIG_CDC 331 static struct usb_interface_descriptor 332 control_intf = { 333 .bLength = sizeof control_intf, 334 .bDescriptorType = USB_DT_INTERFACE, 335 336 .bInterfaceNumber = 0, 337 /* status endpoint is optional; this may be patched later */ 338 .bNumEndpoints = 1, 339 .bInterfaceClass = USB_CLASS_COMM, 340 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, 341 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 342 .iInterface = STRING_CONTROL, 343 }; 344 #endif 345 346 static const struct usb_cdc_header_desc header_desc = { 347 .bLength = sizeof header_desc, 348 .bDescriptorType = USB_DT_CS_INTERFACE, 349 .bDescriptorSubType = USB_CDC_HEADER_TYPE, 350 351 .bcdCDC = __constant_cpu_to_le16(0x0110), 352 }; 353 354 #if defined(DEV_CONFIG_CDC) 355 356 static const struct usb_cdc_union_desc union_desc = { 357 .bLength = sizeof union_desc, 358 .bDescriptorType = USB_DT_CS_INTERFACE, 359 .bDescriptorSubType = USB_CDC_UNION_TYPE, 360 361 .bMasterInterface0 = 0, /* index of control interface */ 362 .bSlaveInterface0 = 1, /* index of DATA interface */ 363 }; 364 365 #endif /* CDC */ 366 367 #ifndef DEV_CONFIG_CDC 368 369 /* 370 * "SAFE" loosely follows CDC WMC MDLM, violating the spec in various 371 * ways: data endpoints live in the control interface, there's no data 372 * interface, and it's not used to talk to a cell phone radio. 373 */ 374 375 static const struct usb_cdc_mdlm_desc mdlm_desc = { 376 .bLength = sizeof mdlm_desc, 377 .bDescriptorType = USB_DT_CS_INTERFACE, 378 .bDescriptorSubType = USB_CDC_MDLM_TYPE, 379 380 .bcdVersion = __constant_cpu_to_le16(0x0100), 381 .bGUID = { 382 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6, 383 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f, 384 }, 385 }; 386 387 /* 388 * since "usb_cdc_mdlm_detail_desc" is a variable length structure, we 389 * can't really use its struct. All we do here is say that we're using 390 * the submode of "SAFE" which directly matches the CDC Subset. 391 */ 392 static const u8 mdlm_detail_desc[] = { 393 6, 394 USB_DT_CS_INTERFACE, 395 USB_CDC_MDLM_DETAIL_TYPE, 396 397 0, /* "SAFE" */ 398 0, /* network control capabilities (none) */ 399 0, /* network data capabilities ("raw" encapsulation) */ 400 }; 401 402 #endif 403 404 static const struct usb_cdc_ether_desc ether_desc = { 405 .bLength = sizeof(ether_desc), 406 .bDescriptorType = USB_DT_CS_INTERFACE, 407 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE, 408 409 /* this descriptor actually adds value, surprise! */ 410 .iMACAddress = STRING_ETHADDR, 411 .bmEthernetStatistics = __constant_cpu_to_le32(0), /* no statistics */ 412 .wMaxSegmentSize = __constant_cpu_to_le16(ETH_FRAME_LEN), 413 .wNumberMCFilters = __constant_cpu_to_le16(0), 414 .bNumberPowerFilters = 0, 415 }; 416 417 #if defined(DEV_CONFIG_CDC) 418 419 /* 420 * include the status endpoint if we can, even where it's optional. 421 * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one 422 * packet, to simplify cancellation; and a big transfer interval, to 423 * waste less bandwidth. 424 * 425 * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even 426 * if they ignore the connect/disconnect notifications that real aether 427 * can provide. more advanced cdc configurations might want to support 428 * encapsulated commands (vendor-specific, using control-OUT). 429 */ 430 431 #define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */ 432 #define STATUS_BYTECOUNT 16 /* 8 byte header + data */ 433 434 static struct usb_endpoint_descriptor 435 fs_status_desc = { 436 .bLength = USB_DT_ENDPOINT_SIZE, 437 .bDescriptorType = USB_DT_ENDPOINT, 438 439 .bEndpointAddress = USB_DIR_IN, 440 .bmAttributes = USB_ENDPOINT_XFER_INT, 441 .wMaxPacketSize = __constant_cpu_to_le16(STATUS_BYTECOUNT), 442 .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, 443 }; 444 #endif 445 446 #ifdef DEV_CONFIG_CDC 447 448 /* the default data interface has no endpoints ... */ 449 450 static const struct usb_interface_descriptor 451 data_nop_intf = { 452 .bLength = sizeof data_nop_intf, 453 .bDescriptorType = USB_DT_INTERFACE, 454 455 .bInterfaceNumber = 1, 456 .bAlternateSetting = 0, 457 .bNumEndpoints = 0, 458 .bInterfaceClass = USB_CLASS_CDC_DATA, 459 .bInterfaceSubClass = 0, 460 .bInterfaceProtocol = 0, 461 }; 462 463 /* ... but the "real" data interface has two bulk endpoints */ 464 465 static const struct usb_interface_descriptor 466 data_intf = { 467 .bLength = sizeof data_intf, 468 .bDescriptorType = USB_DT_INTERFACE, 469 470 .bInterfaceNumber = 1, 471 .bAlternateSetting = 1, 472 .bNumEndpoints = 2, 473 .bInterfaceClass = USB_CLASS_CDC_DATA, 474 .bInterfaceSubClass = 0, 475 .bInterfaceProtocol = 0, 476 .iInterface = STRING_DATA, 477 }; 478 479 #endif 480 481 #ifdef DEV_CONFIG_SUBSET 482 483 /* 484 * "Simple" CDC-subset option is a simple vendor-neutral model that most 485 * full speed controllers can handle: one interface, two bulk endpoints. 486 * 487 * To assist host side drivers, we fancy it up a bit, and add descriptors 488 * so some host side drivers will understand it as a "SAFE" variant. 489 */ 490 491 static const struct usb_interface_descriptor 492 subset_data_intf = { 493 .bLength = sizeof subset_data_intf, 494 .bDescriptorType = USB_DT_INTERFACE, 495 496 .bInterfaceNumber = 0, 497 .bAlternateSetting = 0, 498 .bNumEndpoints = 2, 499 .bInterfaceClass = USB_CLASS_COMM, 500 .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM, 501 .bInterfaceProtocol = 0, 502 .iInterface = STRING_DATA, 503 }; 504 505 #endif /* SUBSET */ 506 507 static struct usb_endpoint_descriptor 508 fs_source_desc = { 509 .bLength = USB_DT_ENDPOINT_SIZE, 510 .bDescriptorType = USB_DT_ENDPOINT, 511 512 .bEndpointAddress = USB_DIR_IN, 513 .bmAttributes = USB_ENDPOINT_XFER_BULK, 514 }; 515 516 static struct usb_endpoint_descriptor 517 fs_sink_desc = { 518 .bLength = USB_DT_ENDPOINT_SIZE, 519 .bDescriptorType = USB_DT_ENDPOINT, 520 521 .bEndpointAddress = USB_DIR_OUT, 522 .bmAttributes = USB_ENDPOINT_XFER_BULK, 523 }; 524 525 static const struct usb_descriptor_header *fs_eth_function[11] = { 526 (struct usb_descriptor_header *) &otg_descriptor, 527 #ifdef DEV_CONFIG_CDC 528 /* "cdc" mode descriptors */ 529 (struct usb_descriptor_header *) &control_intf, 530 (struct usb_descriptor_header *) &header_desc, 531 (struct usb_descriptor_header *) &union_desc, 532 (struct usb_descriptor_header *) ðer_desc, 533 /* NOTE: status endpoint may need to be removed */ 534 (struct usb_descriptor_header *) &fs_status_desc, 535 /* data interface, with altsetting */ 536 (struct usb_descriptor_header *) &data_nop_intf, 537 (struct usb_descriptor_header *) &data_intf, 538 (struct usb_descriptor_header *) &fs_source_desc, 539 (struct usb_descriptor_header *) &fs_sink_desc, 540 NULL, 541 #endif /* DEV_CONFIG_CDC */ 542 }; 543 544 static inline void fs_subset_descriptors(void) 545 { 546 #ifdef DEV_CONFIG_SUBSET 547 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */ 548 fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf; 549 fs_eth_function[2] = (struct usb_descriptor_header *) &header_desc; 550 fs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc; 551 fs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc; 552 fs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc; 553 fs_eth_function[6] = (struct usb_descriptor_header *) &fs_source_desc; 554 fs_eth_function[7] = (struct usb_descriptor_header *) &fs_sink_desc; 555 fs_eth_function[8] = NULL; 556 #else 557 fs_eth_function[1] = NULL; 558 #endif 559 } 560 561 /* 562 * usb 2.0 devices need to expose both high speed and full speed 563 * descriptors, unless they only run at full speed. 564 */ 565 566 #if defined(DEV_CONFIG_CDC) 567 static struct usb_endpoint_descriptor 568 hs_status_desc = { 569 .bLength = USB_DT_ENDPOINT_SIZE, 570 .bDescriptorType = USB_DT_ENDPOINT, 571 572 .bmAttributes = USB_ENDPOINT_XFER_INT, 573 .wMaxPacketSize = __constant_cpu_to_le16(STATUS_BYTECOUNT), 574 .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, 575 }; 576 #endif /* DEV_CONFIG_CDC */ 577 578 static struct usb_endpoint_descriptor 579 hs_source_desc = { 580 .bLength = USB_DT_ENDPOINT_SIZE, 581 .bDescriptorType = USB_DT_ENDPOINT, 582 583 .bmAttributes = USB_ENDPOINT_XFER_BULK, 584 .wMaxPacketSize = __constant_cpu_to_le16(512), 585 }; 586 587 static struct usb_endpoint_descriptor 588 hs_sink_desc = { 589 .bLength = USB_DT_ENDPOINT_SIZE, 590 .bDescriptorType = USB_DT_ENDPOINT, 591 592 .bmAttributes = USB_ENDPOINT_XFER_BULK, 593 .wMaxPacketSize = __constant_cpu_to_le16(512), 594 }; 595 596 static struct usb_qualifier_descriptor 597 dev_qualifier = { 598 .bLength = sizeof dev_qualifier, 599 .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 600 601 .bcdUSB = __constant_cpu_to_le16(0x0200), 602 .bDeviceClass = USB_CLASS_COMM, 603 604 .bNumConfigurations = 1, 605 }; 606 607 static const struct usb_descriptor_header *hs_eth_function[11] = { 608 (struct usb_descriptor_header *) &otg_descriptor, 609 #ifdef DEV_CONFIG_CDC 610 /* "cdc" mode descriptors */ 611 (struct usb_descriptor_header *) &control_intf, 612 (struct usb_descriptor_header *) &header_desc, 613 (struct usb_descriptor_header *) &union_desc, 614 (struct usb_descriptor_header *) ðer_desc, 615 /* NOTE: status endpoint may need to be removed */ 616 (struct usb_descriptor_header *) &hs_status_desc, 617 /* data interface, with altsetting */ 618 (struct usb_descriptor_header *) &data_nop_intf, 619 (struct usb_descriptor_header *) &data_intf, 620 (struct usb_descriptor_header *) &hs_source_desc, 621 (struct usb_descriptor_header *) &hs_sink_desc, 622 NULL, 623 #endif /* DEV_CONFIG_CDC */ 624 }; 625 626 static inline void hs_subset_descriptors(void) 627 { 628 #ifdef DEV_CONFIG_SUBSET 629 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */ 630 hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf; 631 hs_eth_function[2] = (struct usb_descriptor_header *) &header_desc; 632 hs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc; 633 hs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc; 634 hs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc; 635 hs_eth_function[6] = (struct usb_descriptor_header *) &hs_source_desc; 636 hs_eth_function[7] = (struct usb_descriptor_header *) &hs_sink_desc; 637 hs_eth_function[8] = NULL; 638 #else 639 hs_eth_function[1] = NULL; 640 #endif 641 } 642 643 /* maxpacket and other transfer characteristics vary by speed. */ 644 static inline struct usb_endpoint_descriptor * 645 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, 646 struct usb_endpoint_descriptor *fs) 647 { 648 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 649 return hs; 650 return fs; 651 } 652 653 /*-------------------------------------------------------------------------*/ 654 655 /* descriptors that are built on-demand */ 656 657 static char manufacturer[50]; 658 static char product_desc[40] = DRIVER_DESC; 659 static char serial_number[20]; 660 661 /* address that the host will use ... usually assigned at random */ 662 static char ethaddr[2 * ETH_ALEN + 1]; 663 664 /* static strings, in UTF-8 */ 665 static struct usb_string strings[] = { 666 { STRING_MANUFACTURER, manufacturer, }, 667 { STRING_PRODUCT, product_desc, }, 668 { STRING_SERIALNUMBER, serial_number, }, 669 { STRING_DATA, "Ethernet Data", }, 670 { STRING_ETHADDR, ethaddr, }, 671 #ifdef DEV_CONFIG_CDC 672 { STRING_CDC, "CDC Ethernet", }, 673 { STRING_CONTROL, "CDC Communications Control", }, 674 #endif 675 #ifdef DEV_CONFIG_SUBSET 676 { STRING_SUBSET, "CDC Ethernet Subset", }, 677 #endif 678 { } /* end of list */ 679 }; 680 681 static struct usb_gadget_strings stringtab = { 682 .language = 0x0409, /* en-us */ 683 .strings = strings, 684 }; 685 686 /*============================================================================*/ 687 static u8 control_req[USB_BUFSIZ]; 688 static u8 status_req[STATUS_BYTECOUNT] __attribute__ ((aligned(4))); 689 690 691 /** 692 * strlcpy - Copy a %NUL terminated string into a sized buffer 693 * @dest: Where to copy the string to 694 * @src: Where to copy the string from 695 * @size: size of destination buffer 696 * 697 * Compatible with *BSD: the result is always a valid 698 * NUL-terminated string that fits in the buffer (unless, 699 * of course, the buffer size is zero). It does not pad 700 * out the result like strncpy() does. 701 */ 702 size_t strlcpy(char *dest, const char *src, size_t size) 703 { 704 size_t ret = strlen(src); 705 706 if (size) { 707 size_t len = (ret >= size) ? size - 1 : ret; 708 memcpy(dest, src, len); 709 dest[len] = '\0'; 710 } 711 return ret; 712 } 713 714 /*============================================================================*/ 715 716 /* 717 * one config, two interfaces: control, data. 718 * complications: class descriptors, and an altsetting. 719 */ 720 static int 721 config_buf(struct usb_gadget *g, u8 *buf, u8 type, unsigned index, int is_otg) 722 { 723 int len; 724 const struct usb_config_descriptor *config; 725 const struct usb_descriptor_header **function; 726 int hs = 0; 727 728 if (gadget_is_dualspeed(g)) { 729 hs = (g->speed == USB_SPEED_HIGH); 730 if (type == USB_DT_OTHER_SPEED_CONFIG) 731 hs = !hs; 732 } 733 #define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function) 734 735 if (index >= device_desc.bNumConfigurations) 736 return -EINVAL; 737 738 config = ð_config; 739 function = which_fn(eth); 740 741 /* for now, don't advertise srp-only devices */ 742 if (!is_otg) 743 function++; 744 745 len = usb_gadget_config_buf(config, buf, USB_BUFSIZ, function); 746 if (len < 0) 747 return len; 748 ((struct usb_config_descriptor *) buf)->bDescriptorType = type; 749 return len; 750 } 751 752 /*-------------------------------------------------------------------------*/ 753 754 static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags); 755 756 static int 757 set_ether_config(struct eth_dev *dev, gfp_t gfp_flags) 758 { 759 int result = 0; 760 struct usb_gadget *gadget = dev->gadget; 761 762 #if defined(DEV_CONFIG_CDC) 763 /* status endpoint used for (optionally) CDC */ 764 if (!subset_active(dev) && dev->status_ep) { 765 dev->status = ep_desc(gadget, &hs_status_desc, 766 &fs_status_desc); 767 dev->status_ep->driver_data = dev; 768 769 result = usb_ep_enable(dev->status_ep, dev->status); 770 if (result != 0) { 771 debug("enable %s --> %d\n", 772 dev->status_ep->name, result); 773 goto done; 774 } 775 } 776 #endif 777 778 dev->in = ep_desc(gadget, &hs_source_desc, &fs_source_desc); 779 dev->in_ep->driver_data = dev; 780 781 dev->out = ep_desc(gadget, &hs_sink_desc, &fs_sink_desc); 782 dev->out_ep->driver_data = dev; 783 784 /* 785 * With CDC, the host isn't allowed to use these two data 786 * endpoints in the default altsetting for the interface. 787 * so we don't activate them yet. Reset from SET_INTERFACE. 788 */ 789 if (!cdc_active(dev)) { 790 result = usb_ep_enable(dev->in_ep, dev->in); 791 if (result != 0) { 792 debug("enable %s --> %d\n", 793 dev->in_ep->name, result); 794 goto done; 795 } 796 797 result = usb_ep_enable(dev->out_ep, dev->out); 798 if (result != 0) { 799 debug("enable %s --> %d\n", 800 dev->out_ep->name, result); 801 goto done; 802 } 803 } 804 805 done: 806 if (result == 0) 807 result = alloc_requests(dev, qlen(gadget), gfp_flags); 808 809 /* on error, disable any endpoints */ 810 if (result < 0) { 811 if (!subset_active(dev) && dev->status_ep) 812 (void) usb_ep_disable(dev->status_ep); 813 dev->status = NULL; 814 (void) usb_ep_disable(dev->in_ep); 815 (void) usb_ep_disable(dev->out_ep); 816 dev->in = NULL; 817 dev->out = NULL; 818 } 819 820 /* caller is responsible for cleanup on error */ 821 return result; 822 } 823 824 static void eth_reset_config(struct eth_dev *dev) 825 { 826 if (dev->config == 0) 827 return; 828 829 debug("%s\n", __func__); 830 831 /* 832 * disable endpoints, forcing (synchronous) completion of 833 * pending i/o. then free the requests. 834 */ 835 836 if (dev->in) { 837 usb_ep_disable(dev->in_ep); 838 if (dev->tx_req) { 839 usb_ep_free_request(dev->in_ep, dev->tx_req); 840 dev->tx_req = NULL; 841 } 842 } 843 if (dev->out) { 844 usb_ep_disable(dev->out_ep); 845 if (dev->rx_req) { 846 usb_ep_free_request(dev->out_ep, dev->rx_req); 847 dev->rx_req = NULL; 848 } 849 } 850 if (dev->status) 851 usb_ep_disable(dev->status_ep); 852 853 dev->cdc_filter = 0; 854 dev->config = 0; 855 } 856 857 /* 858 * change our operational config. must agree with the code 859 * that returns config descriptors, and altsetting code. 860 */ 861 static int eth_set_config(struct eth_dev *dev, unsigned number, 862 gfp_t gfp_flags) 863 { 864 int result = 0; 865 struct usb_gadget *gadget = dev->gadget; 866 867 if (gadget_is_sa1100(gadget) 868 && dev->config 869 && dev->tx_qlen != 0) { 870 /* tx fifo is full, but we can't clear it...*/ 871 error("can't change configurations"); 872 return -ESPIPE; 873 } 874 eth_reset_config(dev); 875 876 switch (number) { 877 case DEV_CONFIG_VALUE: 878 result = set_ether_config(dev, gfp_flags); 879 break; 880 default: 881 result = -EINVAL; 882 /* FALL THROUGH */ 883 case 0: 884 break; 885 } 886 887 if (result) { 888 if (number) 889 eth_reset_config(dev); 890 usb_gadget_vbus_draw(dev->gadget, 891 gadget_is_otg(dev->gadget) ? 8 : 100); 892 } else { 893 char *speed; 894 unsigned power; 895 896 power = 2 * eth_config.bMaxPower; 897 usb_gadget_vbus_draw(dev->gadget, power); 898 899 switch (gadget->speed) { 900 case USB_SPEED_FULL: 901 speed = "full"; break; 902 #ifdef CONFIG_USB_GADGET_DUALSPEED 903 case USB_SPEED_HIGH: 904 speed = "high"; break; 905 #endif 906 default: 907 speed = "?"; break; 908 } 909 910 dev->config = number; 911 printf("%s speed config #%d: %d mA, %s, using %s\n", 912 speed, number, power, driver_desc, 913 (cdc_active(dev) ? "CDC Ethernet" 914 : "CDC Ethernet Subset")); 915 } 916 return result; 917 } 918 919 /*-------------------------------------------------------------------------*/ 920 921 #ifdef DEV_CONFIG_CDC 922 923 /* 924 * The interrupt endpoint is used in CDC networking models (Ethernet, ATM) 925 * only to notify the host about link status changes (which we support) or 926 * report completion of some encapsulated command. Since 927 * we want this CDC Ethernet code to be vendor-neutral, we don't use that 928 * command mechanism; and only one status request is ever queued. 929 */ 930 static void eth_status_complete(struct usb_ep *ep, struct usb_request *req) 931 { 932 struct usb_cdc_notification *event = req->buf; 933 int value = req->status; 934 struct eth_dev *dev = ep->driver_data; 935 936 /* issue the second notification if host reads the first */ 937 if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION 938 && value == 0) { 939 __le32 *data = req->buf + sizeof *event; 940 941 event->bmRequestType = 0xA1; 942 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE; 943 event->wValue = __constant_cpu_to_le16(0); 944 event->wIndex = __constant_cpu_to_le16(1); 945 event->wLength = __constant_cpu_to_le16(8); 946 947 /* SPEED_CHANGE data is up/down speeds in bits/sec */ 948 data[0] = data[1] = cpu_to_le32(BITRATE(dev->gadget)); 949 950 req->length = STATUS_BYTECOUNT; 951 value = usb_ep_queue(ep, req, GFP_ATOMIC); 952 debug("send SPEED_CHANGE --> %d\n", value); 953 if (value == 0) 954 return; 955 } else if (value != -ECONNRESET) { 956 debug("event %02x --> %d\n", 957 event->bNotificationType, value); 958 if (event->bNotificationType == 959 USB_CDC_NOTIFY_SPEED_CHANGE) { 960 l_ethdev.network_started = 1; 961 printf("USB network up!\n"); 962 } 963 } 964 req->context = NULL; 965 } 966 967 static void issue_start_status(struct eth_dev *dev) 968 { 969 struct usb_request *req = dev->stat_req; 970 struct usb_cdc_notification *event; 971 int value; 972 973 /* 974 * flush old status 975 * 976 * FIXME ugly idiom, maybe we'd be better with just 977 * a "cancel the whole queue" primitive since any 978 * unlink-one primitive has way too many error modes. 979 * here, we "know" toggle is already clear... 980 * 981 * FIXME iff req->context != null just dequeue it 982 */ 983 usb_ep_disable(dev->status_ep); 984 usb_ep_enable(dev->status_ep, dev->status); 985 986 /* 987 * 3.8.1 says to issue first NETWORK_CONNECTION, then 988 * a SPEED_CHANGE. could be useful in some configs. 989 */ 990 event = req->buf; 991 event->bmRequestType = 0xA1; 992 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION; 993 event->wValue = __constant_cpu_to_le16(1); /* connected */ 994 event->wIndex = __constant_cpu_to_le16(1); 995 event->wLength = 0; 996 997 req->length = sizeof *event; 998 req->complete = eth_status_complete; 999 req->context = dev; 1000 1001 value = usb_ep_queue(dev->status_ep, req, GFP_ATOMIC); 1002 if (value < 0) 1003 debug("status buf queue --> %d\n", value); 1004 } 1005 1006 #endif 1007 1008 /*-------------------------------------------------------------------------*/ 1009 1010 static void eth_setup_complete(struct usb_ep *ep, struct usb_request *req) 1011 { 1012 if (req->status || req->actual != req->length) 1013 debug("setup complete --> %d, %d/%d\n", 1014 req->status, req->actual, req->length); 1015 } 1016 1017 /* 1018 * The setup() callback implements all the ep0 functionality that's not 1019 * handled lower down. CDC has a number of less-common features: 1020 * 1021 * - two interfaces: control, and ethernet data 1022 * - Ethernet data interface has two altsettings: default, and active 1023 * - class-specific descriptors for the control interface 1024 * - class-specific control requests 1025 */ 1026 static int 1027 eth_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) 1028 { 1029 struct eth_dev *dev = get_gadget_data(gadget); 1030 struct usb_request *req = dev->req; 1031 int value = -EOPNOTSUPP; 1032 u16 wIndex = le16_to_cpu(ctrl->wIndex); 1033 u16 wValue = le16_to_cpu(ctrl->wValue); 1034 u16 wLength = le16_to_cpu(ctrl->wLength); 1035 1036 /* 1037 * descriptors just go into the pre-allocated ep0 buffer, 1038 * while config change events may enable network traffic. 1039 */ 1040 1041 debug("%s\n", __func__); 1042 1043 req->complete = eth_setup_complete; 1044 switch (ctrl->bRequest) { 1045 1046 case USB_REQ_GET_DESCRIPTOR: 1047 if (ctrl->bRequestType != USB_DIR_IN) 1048 break; 1049 switch (wValue >> 8) { 1050 1051 case USB_DT_DEVICE: 1052 value = min(wLength, (u16) sizeof device_desc); 1053 memcpy(req->buf, &device_desc, value); 1054 break; 1055 case USB_DT_DEVICE_QUALIFIER: 1056 if (!gadget_is_dualspeed(gadget)) 1057 break; 1058 value = min(wLength, (u16) sizeof dev_qualifier); 1059 memcpy(req->buf, &dev_qualifier, value); 1060 break; 1061 1062 case USB_DT_OTHER_SPEED_CONFIG: 1063 if (!gadget_is_dualspeed(gadget)) 1064 break; 1065 /* FALLTHROUGH */ 1066 case USB_DT_CONFIG: 1067 value = config_buf(gadget, req->buf, 1068 wValue >> 8, 1069 wValue & 0xff, 1070 gadget_is_otg(gadget)); 1071 if (value >= 0) 1072 value = min(wLength, (u16) value); 1073 break; 1074 1075 case USB_DT_STRING: 1076 value = usb_gadget_get_string(&stringtab, 1077 wValue & 0xff, req->buf); 1078 1079 if (value >= 0) 1080 value = min(wLength, (u16) value); 1081 1082 break; 1083 } 1084 break; 1085 1086 case USB_REQ_SET_CONFIGURATION: 1087 if (ctrl->bRequestType != 0) 1088 break; 1089 if (gadget->a_hnp_support) 1090 debug("HNP available\n"); 1091 else if (gadget->a_alt_hnp_support) 1092 debug("HNP needs a different root port\n"); 1093 value = eth_set_config(dev, wValue, GFP_ATOMIC); 1094 break; 1095 case USB_REQ_GET_CONFIGURATION: 1096 if (ctrl->bRequestType != USB_DIR_IN) 1097 break; 1098 *(u8 *)req->buf = dev->config; 1099 value = min(wLength, (u16) 1); 1100 break; 1101 1102 case USB_REQ_SET_INTERFACE: 1103 if (ctrl->bRequestType != USB_RECIP_INTERFACE 1104 || !dev->config 1105 || wIndex > 1) 1106 break; 1107 if (!cdc_active(dev) && wIndex != 0) 1108 break; 1109 1110 /* 1111 * PXA hardware partially handles SET_INTERFACE; 1112 * we need to kluge around that interference. 1113 */ 1114 if (gadget_is_pxa(gadget)) { 1115 value = eth_set_config(dev, DEV_CONFIG_VALUE, 1116 GFP_ATOMIC); 1117 goto done_set_intf; 1118 } 1119 1120 #ifdef DEV_CONFIG_CDC 1121 switch (wIndex) { 1122 case 0: /* control/master intf */ 1123 if (wValue != 0) 1124 break; 1125 if (dev->status) { 1126 usb_ep_disable(dev->status_ep); 1127 usb_ep_enable(dev->status_ep, dev->status); 1128 } 1129 value = 0; 1130 break; 1131 case 1: /* data intf */ 1132 if (wValue > 1) 1133 break; 1134 usb_ep_disable(dev->in_ep); 1135 usb_ep_disable(dev->out_ep); 1136 1137 /* 1138 * CDC requires the data transfers not be done from 1139 * the default interface setting ... also, setting 1140 * the non-default interface resets filters etc. 1141 */ 1142 if (wValue == 1) { 1143 if (!cdc_active(dev)) 1144 break; 1145 usb_ep_enable(dev->in_ep, dev->in); 1146 usb_ep_enable(dev->out_ep, dev->out); 1147 dev->cdc_filter = DEFAULT_FILTER; 1148 if (dev->status) 1149 issue_start_status(dev); 1150 } 1151 1152 value = 0; 1153 break; 1154 } 1155 #else 1156 /* 1157 * FIXME this is wrong, as is the assumption that 1158 * all non-PXA hardware talks real CDC ... 1159 */ 1160 debug("set_interface ignored!\n"); 1161 #endif /* DEV_CONFIG_CDC */ 1162 1163 done_set_intf: 1164 break; 1165 case USB_REQ_GET_INTERFACE: 1166 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) 1167 || !dev->config 1168 || wIndex > 1) 1169 break; 1170 if (!(cdc_active(dev)) && wIndex != 0) 1171 break; 1172 1173 /* for CDC, iff carrier is on, data interface is active. */ 1174 if (wIndex != 1) 1175 *(u8 *)req->buf = 0; 1176 else { 1177 /* *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; */ 1178 /* carrier always ok ...*/ 1179 *(u8 *)req->buf = 1 ; 1180 } 1181 value = min(wLength, (u16) 1); 1182 break; 1183 1184 #ifdef DEV_CONFIG_CDC 1185 case USB_CDC_SET_ETHERNET_PACKET_FILTER: 1186 /* 1187 * see 6.2.30: no data, wIndex = interface, 1188 * wValue = packet filter bitmap 1189 */ 1190 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) 1191 || !cdc_active(dev) 1192 || wLength != 0 1193 || wIndex > 1) 1194 break; 1195 debug("packet filter %02x\n", wValue); 1196 dev->cdc_filter = wValue; 1197 value = 0; 1198 break; 1199 1200 /* 1201 * and potentially: 1202 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS: 1203 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER: 1204 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER: 1205 * case USB_CDC_GET_ETHERNET_STATISTIC: 1206 */ 1207 1208 #endif /* DEV_CONFIG_CDC */ 1209 1210 default: 1211 debug("unknown control req%02x.%02x v%04x i%04x l%d\n", 1212 ctrl->bRequestType, ctrl->bRequest, 1213 wValue, wIndex, wLength); 1214 } 1215 1216 /* respond with data transfer before status phase? */ 1217 if (value >= 0) { 1218 debug("respond with data transfer before status phase\n"); 1219 req->length = value; 1220 req->zero = value < wLength 1221 && (value % gadget->ep0->maxpacket) == 0; 1222 value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); 1223 if (value < 0) { 1224 debug("ep_queue --> %d\n", value); 1225 req->status = 0; 1226 eth_setup_complete(gadget->ep0, req); 1227 } 1228 } 1229 1230 /* host either stalls (value < 0) or reports success */ 1231 return value; 1232 } 1233 1234 /*-------------------------------------------------------------------------*/ 1235 1236 static void rx_complete(struct usb_ep *ep, struct usb_request *req); 1237 1238 static int rx_submit(struct eth_dev *dev, struct usb_request *req, 1239 gfp_t gfp_flags) 1240 { 1241 int retval = -ENOMEM; 1242 size_t size; 1243 1244 /* 1245 * Padding up to RX_EXTRA handles minor disagreements with host. 1246 * Normally we use the USB "terminate on short read" convention; 1247 * so allow up to (N*maxpacket), since that memory is normally 1248 * already allocated. Some hardware doesn't deal well with short 1249 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a 1250 * byte off the end (to force hardware errors on overflow). 1251 */ 1252 1253 debug("%s\n", __func__); 1254 1255 size = (ETHER_HDR_SIZE + dev->mtu + RX_EXTRA); 1256 size += dev->out_ep->maxpacket - 1; 1257 size -= size % dev->out_ep->maxpacket; 1258 1259 /* 1260 * Some platforms perform better when IP packets are aligned, 1261 * but on at least one, checksumming fails otherwise. 1262 */ 1263 1264 req->buf = (u8 *) NetRxPackets[0]; 1265 req->length = size; 1266 req->complete = rx_complete; 1267 1268 retval = usb_ep_queue(dev->out_ep, req, gfp_flags); 1269 1270 if (retval) 1271 error("rx submit --> %d", retval); 1272 1273 return retval; 1274 } 1275 1276 static void rx_complete(struct usb_ep *ep, struct usb_request *req) 1277 { 1278 struct eth_dev *dev = ep->driver_data; 1279 1280 debug("%s: status %d\n", __func__, req->status); 1281 switch (req->status) { 1282 /* normal completion */ 1283 case 0: 1284 dev->stats.rx_packets++; 1285 dev->stats.rx_bytes += req->length; 1286 break; 1287 1288 /* software-driven interface shutdown */ 1289 case -ECONNRESET: /* unlink */ 1290 case -ESHUTDOWN: /* disconnect etc */ 1291 /* for hardware automagic (such as pxa) */ 1292 case -ECONNABORTED: /* endpoint reset */ 1293 break; 1294 1295 /* data overrun */ 1296 case -EOVERFLOW: 1297 dev->stats.rx_over_errors++; 1298 /* FALLTHROUGH */ 1299 default: 1300 dev->stats.rx_errors++; 1301 break; 1302 } 1303 1304 packet_received = 1; 1305 } 1306 1307 static int alloc_requests(struct eth_dev *dev, unsigned n, gfp_t gfp_flags) 1308 { 1309 1310 dev->tx_req = usb_ep_alloc_request(dev->in_ep, 0); 1311 1312 if (!dev->tx_req) 1313 goto fail1; 1314 1315 dev->rx_req = usb_ep_alloc_request(dev->out_ep, 0); 1316 1317 if (!dev->rx_req) 1318 goto fail2; 1319 1320 return 0; 1321 1322 fail2: 1323 usb_ep_free_request(dev->in_ep, dev->tx_req); 1324 fail1: 1325 error("can't alloc requests"); 1326 return -1; 1327 } 1328 1329 static void tx_complete(struct usb_ep *ep, struct usb_request *req) 1330 { 1331 struct eth_dev *dev = ep->driver_data; 1332 1333 debug("%s: status %s\n", __func__, (req->status) ? "failed" : "ok"); 1334 switch (req->status) { 1335 default: 1336 dev->stats.tx_errors++; 1337 debug("tx err %d\n", req->status); 1338 /* FALLTHROUGH */ 1339 case -ECONNRESET: /* unlink */ 1340 case -ESHUTDOWN: /* disconnect etc */ 1341 break; 1342 case 0: 1343 dev->stats.tx_bytes += req->length; 1344 } 1345 dev->stats.tx_packets++; 1346 1347 packet_sent = 1; 1348 } 1349 1350 static inline int eth_is_promisc(struct eth_dev *dev) 1351 { 1352 /* no filters for the CDC subset; always promisc */ 1353 if (subset_active(dev)) 1354 return 1; 1355 return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS; 1356 } 1357 1358 #if 0 1359 static int eth_start_xmit (struct sk_buff *skb, struct net_device *net) 1360 { 1361 struct eth_dev *dev = netdev_priv(net); 1362 int length = skb->len; 1363 int retval; 1364 struct usb_request *req = NULL; 1365 unsigned long flags; 1366 1367 /* apply outgoing CDC or RNDIS filters */ 1368 if (!eth_is_promisc (dev)) { 1369 u8 *dest = skb->data; 1370 1371 if (is_multicast_ether_addr(dest)) { 1372 u16 type; 1373 1374 /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host 1375 * SET_ETHERNET_MULTICAST_FILTERS requests 1376 */ 1377 if (is_broadcast_ether_addr(dest)) 1378 type = USB_CDC_PACKET_TYPE_BROADCAST; 1379 else 1380 type = USB_CDC_PACKET_TYPE_ALL_MULTICAST; 1381 if (!(dev->cdc_filter & type)) { 1382 dev_kfree_skb_any (skb); 1383 return 0; 1384 } 1385 } 1386 /* ignores USB_CDC_PACKET_TYPE_DIRECTED */ 1387 } 1388 1389 spin_lock_irqsave(&dev->req_lock, flags); 1390 /* 1391 * this freelist can be empty if an interrupt triggered disconnect() 1392 * and reconfigured the gadget (shutting down this queue) after the 1393 * network stack decided to xmit but before we got the spinlock. 1394 */ 1395 if (list_empty(&dev->tx_reqs)) { 1396 spin_unlock_irqrestore(&dev->req_lock, flags); 1397 return 1; 1398 } 1399 1400 req = container_of (dev->tx_reqs.next, struct usb_request, list); 1401 list_del (&req->list); 1402 1403 /* temporarily stop TX queue when the freelist empties */ 1404 if (list_empty (&dev->tx_reqs)) 1405 netif_stop_queue (net); 1406 spin_unlock_irqrestore(&dev->req_lock, flags); 1407 1408 /* no buffer copies needed, unless the network stack did it 1409 * or the hardware can't use skb buffers. 1410 * or there's not enough space for any RNDIS headers we need 1411 */ 1412 if (rndis_active(dev)) { 1413 struct sk_buff *skb_rndis; 1414 1415 skb_rndis = skb_realloc_headroom (skb, 1416 sizeof (struct rndis_packet_msg_type)); 1417 if (!skb_rndis) 1418 goto drop; 1419 1420 dev_kfree_skb_any (skb); 1421 skb = skb_rndis; 1422 rndis_add_hdr (skb); 1423 length = skb->len; 1424 } 1425 req->buf = skb->data; 1426 req->context = skb; 1427 req->complete = tx_complete; 1428 1429 /* use zlp framing on tx for strict CDC-Ether conformance, 1430 * though any robust network rx path ignores extra padding. 1431 * and some hardware doesn't like to write zlps. 1432 */ 1433 req->zero = 1; 1434 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0) 1435 length++; 1436 1437 req->length = length; 1438 1439 /* throttle highspeed IRQ rate back slightly */ 1440 if (gadget_is_dualspeed(dev->gadget)) 1441 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH) 1442 ? ((atomic_read(&dev->tx_qlen) % qmult) != 0) 1443 : 0; 1444 1445 retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC); 1446 switch (retval) { 1447 default: 1448 DEBUG (dev, "tx queue err %d\n", retval); 1449 break; 1450 case 0: 1451 net->trans_start = jiffies; 1452 atomic_inc (&dev->tx_qlen); 1453 } 1454 1455 if (retval) { 1456 drop: 1457 dev->stats.tx_dropped++; 1458 dev_kfree_skb_any (skb); 1459 spin_lock_irqsave(&dev->req_lock, flags); 1460 if (list_empty (&dev->tx_reqs)) 1461 netif_start_queue (net); 1462 list_add (&req->list, &dev->tx_reqs); 1463 spin_unlock_irqrestore(&dev->req_lock, flags); 1464 } 1465 return 0; 1466 } 1467 1468 /*-------------------------------------------------------------------------*/ 1469 #endif 1470 1471 static void eth_unbind(struct usb_gadget *gadget) 1472 { 1473 struct eth_dev *dev = get_gadget_data(gadget); 1474 1475 debug("%s...\n", __func__); 1476 1477 /* we've already been disconnected ... no i/o is active */ 1478 if (dev->req) { 1479 usb_ep_free_request(gadget->ep0, dev->req); 1480 dev->req = NULL; 1481 } 1482 if (dev->stat_req) { 1483 usb_ep_free_request(dev->status_ep, dev->stat_req); 1484 dev->stat_req = NULL; 1485 } 1486 1487 if (dev->tx_req) { 1488 usb_ep_free_request(dev->in_ep, dev->tx_req); 1489 dev->tx_req = NULL; 1490 } 1491 1492 if (dev->rx_req) { 1493 usb_ep_free_request(dev->out_ep, dev->rx_req); 1494 dev->rx_req = NULL; 1495 } 1496 1497 /* unregister_netdev (dev->net);*/ 1498 /* free_netdev(dev->net);*/ 1499 1500 dev->gadget = NULL; 1501 set_gadget_data(gadget, NULL); 1502 } 1503 1504 static void eth_disconnect(struct usb_gadget *gadget) 1505 { 1506 eth_reset_config(get_gadget_data(gadget)); 1507 } 1508 1509 static void eth_suspend(struct usb_gadget *gadget) 1510 { 1511 /* Not used */ 1512 } 1513 1514 static void eth_resume(struct usb_gadget *gadget) 1515 { 1516 /* Not used */ 1517 } 1518 1519 /*-------------------------------------------------------------------------*/ 1520 1521 static int is_eth_addr_valid(char *str) 1522 { 1523 if (strlen(str) == 17) { 1524 int i; 1525 char *p, *q; 1526 uchar ea[6]; 1527 1528 /* see if it looks like an ethernet address */ 1529 1530 p = str; 1531 1532 for (i = 0; i < 6; i++) { 1533 char term = (i == 5 ? '\0' : ':'); 1534 1535 ea[i] = simple_strtol(p, &q, 16); 1536 1537 if ((q - p) != 2 || *q++ != term) 1538 break; 1539 1540 p = q; 1541 } 1542 1543 if (i == 6) /* it looks ok */ 1544 return 1; 1545 } 1546 return 0; 1547 } 1548 1549 static u8 nibble(unsigned char c) 1550 { 1551 if (likely(isdigit(c))) 1552 return c - '0'; 1553 c = toupper(c); 1554 if (likely(isxdigit(c))) 1555 return 10 + c - 'A'; 1556 return 0; 1557 } 1558 1559 static int get_ether_addr(const char *str, u8 *dev_addr) 1560 { 1561 if (str) { 1562 unsigned i; 1563 1564 for (i = 0; i < 6; i++) { 1565 unsigned char num; 1566 1567 if ((*str == '.') || (*str == ':')) 1568 str++; 1569 num = nibble(*str++) << 4; 1570 num |= (nibble(*str++)); 1571 dev_addr[i] = num; 1572 } 1573 if (is_valid_ether_addr(dev_addr)) 1574 return 0; 1575 } 1576 return 1; 1577 } 1578 1579 static int eth_bind(struct usb_gadget *gadget) 1580 { 1581 struct eth_dev *dev = &l_ethdev; 1582 u8 cdc = 1, zlp = 1; 1583 struct usb_ep *in_ep, *out_ep, *status_ep = NULL; 1584 int gcnum; 1585 u8 tmp[7]; 1586 1587 /* these flags are only ever cleared; compiler take note */ 1588 #ifndef DEV_CONFIG_CDC 1589 cdc = 0; 1590 #endif 1591 /* 1592 * Because most host side USB stacks handle CDC Ethernet, that 1593 * standard protocol is _strongly_ preferred for interop purposes. 1594 * (By everyone except Microsoft.) 1595 */ 1596 if (gadget_is_pxa(gadget)) { 1597 /* pxa doesn't support altsettings */ 1598 cdc = 0; 1599 } else if (gadget_is_musbhdrc(gadget)) { 1600 /* reduce tx dma overhead by avoiding special cases */ 1601 zlp = 0; 1602 } else if (gadget_is_sh(gadget)) { 1603 /* sh doesn't support multiple interfaces or configs */ 1604 cdc = 0; 1605 } else if (gadget_is_sa1100(gadget)) { 1606 /* hardware can't write zlps */ 1607 zlp = 0; 1608 /* 1609 * sa1100 CAN do CDC, without status endpoint ... we use 1610 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth". 1611 */ 1612 cdc = 0; 1613 } 1614 1615 gcnum = usb_gadget_controller_number(gadget); 1616 if (gcnum >= 0) 1617 device_desc.bcdDevice = cpu_to_le16(0x0300 + gcnum); 1618 else { 1619 /* 1620 * can't assume CDC works. don't want to default to 1621 * anything less functional on CDC-capable hardware, 1622 * so we fail in this case. 1623 */ 1624 error("controller '%s' not recognized", 1625 gadget->name); 1626 return -ENODEV; 1627 } 1628 1629 /* 1630 * CDC subset ... recognized by Linux since 2.4.10, but Windows 1631 * drivers aren't widely available. (That may be improved by 1632 * supporting one submode of the "SAFE" variant of MDLM.) 1633 */ 1634 if (!cdc) { 1635 device_desc.idVendor = 1636 __constant_cpu_to_le16(SIMPLE_VENDOR_NUM); 1637 device_desc.idProduct = 1638 __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM); 1639 } 1640 1641 /* support optional vendor/distro customization */ 1642 #if defined(CONFIG_USB_CDC_VENDOR_ID) && defined(CONFIG_USB_CDC_PRODUCT_ID) 1643 device_desc.idVendor = cpu_to_le16(CONFIG_USB_CDC_VENDOR_ID); 1644 device_desc.idProduct = cpu_to_le16(CONFIG_USB_CDC_PRODUCT_ID); 1645 #endif 1646 if (bcdDevice) 1647 device_desc.bcdDevice = cpu_to_le16(bcdDevice); 1648 if (iManufacturer) 1649 strlcpy(manufacturer, iManufacturer, sizeof manufacturer); 1650 if (iProduct) 1651 strlcpy(product_desc, iProduct, sizeof product_desc); 1652 if (iSerialNumber) { 1653 device_desc.iSerialNumber = STRING_SERIALNUMBER, 1654 strlcpy(serial_number, iSerialNumber, sizeof serial_number); 1655 } 1656 1657 /* all we really need is bulk IN/OUT */ 1658 usb_ep_autoconfig_reset(gadget); 1659 in_ep = usb_ep_autoconfig(gadget, &fs_source_desc); 1660 if (!in_ep) { 1661 autoconf_fail: 1662 error("can't autoconfigure on %s\n", 1663 gadget->name); 1664 return -ENODEV; 1665 } 1666 in_ep->driver_data = in_ep; /* claim */ 1667 1668 out_ep = usb_ep_autoconfig(gadget, &fs_sink_desc); 1669 if (!out_ep) 1670 goto autoconf_fail; 1671 out_ep->driver_data = out_ep; /* claim */ 1672 1673 #if defined(DEV_CONFIG_CDC) 1674 /* 1675 * CDC Ethernet control interface doesn't require a status endpoint. 1676 * Since some hosts expect one, try to allocate one anyway. 1677 */ 1678 if (cdc) { 1679 status_ep = usb_ep_autoconfig(gadget, &fs_status_desc); 1680 if (status_ep) { 1681 status_ep->driver_data = status_ep; /* claim */ 1682 } else if (cdc) { 1683 control_intf.bNumEndpoints = 0; 1684 /* FIXME remove endpoint from descriptor list */ 1685 } 1686 } 1687 #endif 1688 1689 /* one config: cdc, else minimal subset */ 1690 if (!cdc) { 1691 eth_config.bNumInterfaces = 1; 1692 eth_config.iConfiguration = STRING_SUBSET; 1693 1694 /* 1695 * use functions to set these up, in case we're built to work 1696 * with multiple controllers and must override CDC Ethernet. 1697 */ 1698 fs_subset_descriptors(); 1699 hs_subset_descriptors(); 1700 } 1701 1702 device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; 1703 usb_gadget_set_selfpowered(gadget); 1704 1705 if (gadget_is_dualspeed(gadget)) { 1706 if (!cdc) 1707 dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC; 1708 1709 /* assumes ep0 uses the same value for both speeds ... */ 1710 dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0; 1711 1712 /* and that all endpoints are dual-speed */ 1713 hs_source_desc.bEndpointAddress = 1714 fs_source_desc.bEndpointAddress; 1715 hs_sink_desc.bEndpointAddress = 1716 fs_sink_desc.bEndpointAddress; 1717 #if defined(DEV_CONFIG_CDC) 1718 if (status_ep) 1719 hs_status_desc.bEndpointAddress = 1720 fs_status_desc.bEndpointAddress; 1721 #endif 1722 } 1723 1724 if (gadget_is_otg(gadget)) { 1725 otg_descriptor.bmAttributes |= USB_OTG_HNP, 1726 eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP; 1727 eth_config.bMaxPower = 4; 1728 } 1729 1730 dev->net = &l_netdev; 1731 1732 dev->cdc = cdc; 1733 dev->zlp = zlp; 1734 1735 dev->in_ep = in_ep; 1736 dev->out_ep = out_ep; 1737 dev->status_ep = status_ep; 1738 1739 /* 1740 * Module params for these addresses should come from ID proms. 1741 * The host side address is used with CDC, and commonly 1742 * ends up in a persistent config database. It's not clear if 1743 * host side code for the SAFE thing cares -- its original BLAN 1744 * thing didn't, Sharp never assigned those addresses on Zaurii. 1745 */ 1746 get_ether_addr(dev_addr, dev->net->enetaddr); 1747 1748 memset(tmp, 0, sizeof(tmp)); 1749 memcpy(tmp, dev->net->enetaddr, sizeof(dev->net->enetaddr)); 1750 1751 get_ether_addr(host_addr, dev->host_mac); 1752 1753 sprintf(ethaddr, "%02X%02X%02X%02X%02X%02X", 1754 dev->host_mac[0], dev->host_mac[1], 1755 dev->host_mac[2], dev->host_mac[3], 1756 dev->host_mac[4], dev->host_mac[5]); 1757 1758 printf("using %s, OUT %s IN %s%s%s\n", gadget->name, 1759 out_ep->name, in_ep->name, 1760 status_ep ? " STATUS " : "", 1761 status_ep ? status_ep->name : "" 1762 ); 1763 printf("MAC %02x:%02x:%02x:%02x:%02x:%02x\n", 1764 dev->net->enetaddr[0], dev->net->enetaddr[1], 1765 dev->net->enetaddr[2], dev->net->enetaddr[3], 1766 dev->net->enetaddr[4], dev->net->enetaddr[5]); 1767 1768 if (cdc) { 1769 printf("HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n", 1770 dev->host_mac[0], dev->host_mac[1], 1771 dev->host_mac[2], dev->host_mac[3], 1772 dev->host_mac[4], dev->host_mac[5]); 1773 } 1774 1775 /* 1776 * use PKTSIZE (or aligned... from u-boot) and set 1777 * wMaxSegmentSize accordingly 1778 */ 1779 dev->mtu = PKTSIZE_ALIGN; /* RNDIS does not like this, only 1514, TODO*/ 1780 1781 /* preallocate control message data and buffer */ 1782 dev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); 1783 if (!dev->req) 1784 goto fail; 1785 dev->req->buf = control_req; 1786 dev->req->complete = eth_setup_complete; 1787 1788 /* ... and maybe likewise for status transfer */ 1789 #if defined(DEV_CONFIG_CDC) 1790 if (dev->status_ep) { 1791 dev->stat_req = usb_ep_alloc_request(dev->status_ep, 1792 GFP_KERNEL); 1793 if (!dev->stat_req) { 1794 usb_ep_free_request(dev->status_ep, dev->req); 1795 1796 goto fail; 1797 } 1798 dev->stat_req->buf = status_req; 1799 dev->stat_req->context = NULL; 1800 } 1801 #endif 1802 1803 /* finish hookup to lower layer ... */ 1804 dev->gadget = gadget; 1805 set_gadget_data(gadget, dev); 1806 gadget->ep0->driver_data = dev; 1807 1808 /* 1809 * two kinds of host-initiated state changes: 1810 * - iff DATA transfer is active, carrier is "on" 1811 * - tx queueing enabled if open *and* carrier is "on" 1812 */ 1813 return 0; 1814 1815 fail: 1816 error("%s failed", __func__); 1817 eth_unbind(gadget); 1818 return -ENOMEM; 1819 } 1820 1821 static int usb_eth_init(struct eth_device *netdev, bd_t *bd) 1822 { 1823 struct eth_dev *dev = &l_ethdev; 1824 struct usb_gadget *gadget; 1825 unsigned long ts; 1826 unsigned long timeout = USB_CONNECT_TIMEOUT; 1827 1828 if (!netdev) { 1829 error("received NULL ptr"); 1830 goto fail; 1831 } 1832 1833 /* Configure default mac-addresses for the USB ethernet device */ 1834 #ifdef CONFIG_USBNET_DEV_ADDR 1835 strlcpy(dev_addr, CONFIG_USBNET_DEV_ADDR, sizeof(dev_addr)); 1836 #endif 1837 #ifdef CONFIG_USBNET_HOST_ADDR 1838 strlcpy(host_addr, CONFIG_USBNET_HOST_ADDR, sizeof(host_addr)); 1839 #endif 1840 /* Check if the user overruled the MAC addresses */ 1841 if (getenv("usbnet_devaddr")) 1842 strlcpy(dev_addr, getenv("usbnet_devaddr"), 1843 sizeof(dev_addr)); 1844 1845 if (getenv("usbnet_hostaddr")) 1846 strlcpy(host_addr, getenv("usbnet_hostaddr"), 1847 sizeof(host_addr)); 1848 1849 if (!is_eth_addr_valid(dev_addr)) { 1850 error("Need valid 'usbnet_devaddr' to be set"); 1851 goto fail; 1852 } 1853 if (!is_eth_addr_valid(host_addr)) { 1854 error("Need valid 'usbnet_hostaddr' to be set"); 1855 goto fail; 1856 } 1857 1858 if (usb_gadget_register_driver(ð_driver) < 0) 1859 goto fail; 1860 1861 dev->network_started = 0; 1862 1863 packet_received = 0; 1864 packet_sent = 0; 1865 1866 gadget = dev->gadget; 1867 usb_gadget_connect(gadget); 1868 1869 if (getenv("cdc_connect_timeout")) 1870 timeout = simple_strtoul(getenv("cdc_connect_timeout"), 1871 NULL, 10) * CONFIG_SYS_HZ; 1872 ts = get_timer(0); 1873 while (!l_ethdev.network_started) { 1874 /* Handle control-c and timeouts */ 1875 if (ctrlc() || (get_timer(ts) > timeout)) { 1876 error("The remote end did not respond in time."); 1877 goto fail; 1878 } 1879 usb_gadget_handle_interrupts(); 1880 } 1881 1882 packet_received = 0; 1883 rx_submit(dev, dev->rx_req, 0); 1884 return 0; 1885 fail: 1886 return -1; 1887 } 1888 1889 static int usb_eth_send(struct eth_device *netdev, 1890 volatile void *packet, int length) 1891 { 1892 int retval; 1893 struct eth_dev *dev = &l_ethdev; 1894 struct usb_request *req = dev->tx_req; 1895 unsigned long ts; 1896 unsigned long timeout = USB_CONNECT_TIMEOUT; 1897 1898 debug("%s:...\n", __func__); 1899 1900 req->buf = (void *)packet; 1901 req->context = NULL; 1902 req->complete = tx_complete; 1903 1904 /* 1905 * use zlp framing on tx for strict CDC-Ether conformance, 1906 * though any robust network rx path ignores extra padding. 1907 * and some hardware doesn't like to write zlps. 1908 */ 1909 req->zero = 1; 1910 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0) 1911 length++; 1912 1913 req->length = length; 1914 #if 0 1915 /* throttle highspeed IRQ rate back slightly */ 1916 if (gadget_is_dualspeed(dev->gadget)) 1917 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH) 1918 ? ((dev->tx_qlen % qmult) != 0) : 0; 1919 #endif 1920 dev->tx_qlen = 1; 1921 ts = get_timer(0); 1922 packet_sent = 0; 1923 1924 retval = usb_ep_queue(dev->in_ep, req, GFP_ATOMIC); 1925 1926 if (!retval) 1927 debug("%s: packet queued\n", __func__); 1928 while (!packet_sent) { 1929 if (get_timer(ts) > timeout) { 1930 printf("timeout sending packets to usb ethernet\n"); 1931 return -1; 1932 } 1933 usb_gadget_handle_interrupts(); 1934 } 1935 1936 return 0; 1937 } 1938 1939 static int usb_eth_recv(struct eth_device *netdev) 1940 { 1941 struct eth_dev *dev = &l_ethdev; 1942 1943 usb_gadget_handle_interrupts(); 1944 1945 if (packet_received) { 1946 debug("%s: packet received\n", __func__); 1947 if (dev->rx_req) { 1948 NetReceive(NetRxPackets[0], dev->rx_req->length); 1949 packet_received = 0; 1950 1951 rx_submit(dev, dev->rx_req, 0); 1952 } else 1953 error("dev->rx_req invalid"); 1954 } 1955 return 0; 1956 } 1957 1958 void usb_eth_halt(struct eth_device *netdev) 1959 { 1960 struct eth_dev *dev = &l_ethdev; 1961 1962 if (!netdev) { 1963 error("received NULL ptr"); 1964 return; 1965 } 1966 1967 /* If the gadget not registered, simple return */ 1968 if (!dev->gadget) 1969 return; 1970 1971 usb_gadget_disconnect(dev->gadget); 1972 1973 /* Clear pending interrupt */ 1974 if (dev->network_started) { 1975 usb_gadget_handle_interrupts(); 1976 dev->network_started = 0; 1977 } 1978 1979 usb_gadget_unregister_driver(ð_driver); 1980 } 1981 1982 static struct usb_gadget_driver eth_driver = { 1983 .speed = DEVSPEED, 1984 1985 .bind = eth_bind, 1986 .unbind = eth_unbind, 1987 1988 .setup = eth_setup, 1989 .disconnect = eth_disconnect, 1990 1991 .suspend = eth_suspend, 1992 .resume = eth_resume, 1993 }; 1994 1995 int usb_eth_initialize(bd_t *bi) 1996 { 1997 struct eth_device *netdev = &l_netdev; 1998 1999 strlcpy(netdev->name, USB_NET_NAME, sizeof(netdev->name)); 2000 2001 netdev->init = usb_eth_init; 2002 netdev->send = usb_eth_send; 2003 netdev->recv = usb_eth_recv; 2004 netdev->halt = usb_eth_halt; 2005 2006 #ifdef CONFIG_MCAST_TFTP 2007 #error not supported 2008 #endif 2009 eth_register(netdev); 2010 return 0; 2011 } 2012