ether.c revision 55b3fd41b0846929f68b5fb1058ad8077289f584
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/module.h> 27#include <linux/kernel.h> 28#include <linux/delay.h> 29#include <linux/ioport.h> 30#include <linux/slab.h> 31#include <linux/errno.h> 32#include <linux/init.h> 33#include <linux/timer.h> 34#include <linux/list.h> 35#include <linux/interrupt.h> 36#include <linux/utsname.h> 37#include <linux/device.h> 38#include <linux/moduleparam.h> 39#include <linux/ctype.h> 40 41#include <asm/byteorder.h> 42#include <asm/io.h> 43#include <asm/irq.h> 44#include <asm/system.h> 45#include <asm/uaccess.h> 46#include <asm/unaligned.h> 47 48#include <linux/usb/ch9.h> 49#include <linux/usb/cdc.h> 50#include <linux/usb_gadget.h> 51 52#include <linux/random.h> 53#include <linux/netdevice.h> 54#include <linux/etherdevice.h> 55#include <linux/ethtool.h> 56 57#include "gadget_chips.h" 58 59/*-------------------------------------------------------------------------*/ 60 61/* 62 * Ethernet gadget driver -- with CDC and non-CDC options 63 * Builds on hardware support for a full duplex link. 64 * 65 * CDC Ethernet is the standard USB solution for sending Ethernet frames 66 * using USB. Real hardware tends to use the same framing protocol but look 67 * different for control features. This driver strongly prefers to use 68 * this USB-IF standard as its open-systems interoperability solution; 69 * most host side USB stacks (except from Microsoft) support it. 70 * 71 * There's some hardware that can't talk CDC. We make that hardware 72 * implement a "minimalist" vendor-agnostic CDC core: same framing, but 73 * link-level setup only requires activating the configuration. Only the 74 * endpoint descriptors, and product/vendor IDs, are relevant; no control 75 * operations are available. Linux supports it, but other host operating 76 * systems may not. (This is a subset of CDC Ethernet.) 77 * 78 * It turns out that if you add a few descriptors to that "CDC Subset", 79 * (Windows) host side drivers from MCCI can treat it as one submode of 80 * a proprietary scheme called "SAFE" ... without needing to know about 81 * specific product/vendor IDs. So we do that, making it easier to use 82 * those MS-Windows drivers. Those added descriptors make it resemble a 83 * CDC MDLM device, but they don't change device behavior at all. (See 84 * MCCI Engineering report 950198 "SAFE Networking Functions".) 85 * 86 * A third option is also in use. Rather than CDC Ethernet, or something 87 * simpler, Microsoft pushes their own approach: RNDIS. The published 88 * RNDIS specs are ambiguous and appear to be incomplete, and are also 89 * needlessly complex. 90 */ 91 92#define DRIVER_DESC "Ethernet Gadget" 93#define DRIVER_VERSION "May Day 2005" 94 95static const char shortname [] = "ether"; 96static const char driver_desc [] = DRIVER_DESC; 97 98#define RX_EXTRA 20 /* guard against rx overflows */ 99 100#include "rndis.h" 101 102#ifndef CONFIG_USB_ETH_RNDIS 103#define rndis_uninit(x) do{}while(0) 104#define rndis_deregister(c) do{}while(0) 105#define rndis_exit() do{}while(0) 106#endif 107 108/* CDC and RNDIS support the same host-chosen outgoing packet filters. */ 109#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ 110 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ 111 |USB_CDC_PACKET_TYPE_PROMISCUOUS \ 112 |USB_CDC_PACKET_TYPE_DIRECTED) 113 114 115/*-------------------------------------------------------------------------*/ 116 117struct eth_dev { 118 spinlock_t lock; 119 struct usb_gadget *gadget; 120 struct usb_request *req; /* for control responses */ 121 struct usb_request *stat_req; /* for cdc & rndis status */ 122 123 u8 config; 124 struct usb_ep *in_ep, *out_ep, *status_ep; 125 const struct usb_endpoint_descriptor 126 *in, *out, *status; 127 128 spinlock_t req_lock; 129 struct list_head tx_reqs, rx_reqs; 130 131 struct net_device *net; 132 struct net_device_stats stats; 133 atomic_t tx_qlen; 134 135 struct work_struct work; 136 unsigned zlp:1; 137 unsigned cdc:1; 138 unsigned rndis:1; 139 unsigned suspended:1; 140 u16 cdc_filter; 141 unsigned long todo; 142#define WORK_RX_MEMORY 0 143 int rndis_config; 144 u8 host_mac [ETH_ALEN]; 145}; 146 147/* This version autoconfigures as much as possible at run-time. 148 * 149 * It also ASSUMES a self-powered device, without remote wakeup, 150 * although remote wakeup support would make sense. 151 */ 152 153/*-------------------------------------------------------------------------*/ 154 155/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! 156 * Instead: allocate your own, using normal USB-IF procedures. 157 */ 158 159/* Thanks to NetChip Technologies for donating this product ID. 160 * It's for devices with only CDC Ethernet configurations. 161 */ 162#define CDC_VENDOR_NUM 0x0525 /* NetChip */ 163#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */ 164 165/* For hardware that can't talk CDC, we use the same vendor ID that 166 * ARM Linux has used for ethernet-over-usb, both with sa1100 and 167 * with pxa250. We're protocol-compatible, if the host-side drivers 168 * use the endpoint descriptors. bcdDevice (version) is nonzero, so 169 * drivers that need to hard-wire endpoint numbers have a hook. 170 * 171 * The protocol is a minimal subset of CDC Ether, which works on any bulk 172 * hardware that's not deeply broken ... even on hardware that can't talk 173 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that 174 * doesn't handle control-OUT). 175 */ 176#define SIMPLE_VENDOR_NUM 0x049f 177#define SIMPLE_PRODUCT_NUM 0x505a 178 179/* For hardware that can talk RNDIS and either of the above protocols, 180 * use this ID ... the windows INF files will know it. Unless it's 181 * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose 182 * the non-RNDIS configuration. 183 */ 184#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */ 185#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */ 186 187 188/* Some systems will want different product identifers published in the 189 * device descriptor, either numbers or strings or both. These string 190 * parameters are in UTF-8 (superset of ASCII's 7 bit characters). 191 */ 192 193static ushort idVendor; 194module_param(idVendor, ushort, S_IRUGO); 195MODULE_PARM_DESC(idVendor, "USB Vendor ID"); 196 197static ushort idProduct; 198module_param(idProduct, ushort, S_IRUGO); 199MODULE_PARM_DESC(idProduct, "USB Product ID"); 200 201static ushort bcdDevice; 202module_param(bcdDevice, ushort, S_IRUGO); 203MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); 204 205static char *iManufacturer; 206module_param(iManufacturer, charp, S_IRUGO); 207MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); 208 209static char *iProduct; 210module_param(iProduct, charp, S_IRUGO); 211MODULE_PARM_DESC(iProduct, "USB Product string"); 212 213static char *iSerialNumber; 214module_param(iSerialNumber, charp, S_IRUGO); 215MODULE_PARM_DESC(iSerialNumber, "SerialNumber"); 216 217/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */ 218static char *dev_addr; 219module_param(dev_addr, charp, S_IRUGO); 220MODULE_PARM_DESC(dev_addr, "Device Ethernet Address"); 221 222/* this address is invisible to ifconfig */ 223static char *host_addr; 224module_param(host_addr, charp, S_IRUGO); 225MODULE_PARM_DESC(host_addr, "Host Ethernet Address"); 226 227 228/*-------------------------------------------------------------------------*/ 229 230/* Include CDC support if we could run on CDC-capable hardware. */ 231 232#ifdef CONFIG_USB_GADGET_NET2280 233#define DEV_CONFIG_CDC 234#endif 235 236#ifdef CONFIG_USB_GADGET_DUMMY_HCD 237#define DEV_CONFIG_CDC 238#endif 239 240#ifdef CONFIG_USB_GADGET_GOKU 241#define DEV_CONFIG_CDC 242#endif 243 244#ifdef CONFIG_USB_GADGET_LH7A40X 245#define DEV_CONFIG_CDC 246#endif 247 248#ifdef CONFIG_USB_GADGET_MQ11XX 249#define DEV_CONFIG_CDC 250#endif 251 252#ifdef CONFIG_USB_GADGET_OMAP 253#define DEV_CONFIG_CDC 254#endif 255 256#ifdef CONFIG_USB_GADGET_N9604 257#define DEV_CONFIG_CDC 258#endif 259 260#ifdef CONFIG_USB_GADGET_PXA27X 261#define DEV_CONFIG_CDC 262#endif 263 264#ifdef CONFIG_USB_GADGET_S3C2410 265#define DEV_CONFIG_CDC 266#endif 267 268#ifdef CONFIG_USB_GADGET_AT91 269#define DEV_CONFIG_CDC 270#endif 271 272#ifdef CONFIG_USB_GADGET_MUSBHSFC 273#define DEV_CONFIG_CDC 274#endif 275 276#ifdef CONFIG_USB_GADGET_MUSB_HDRC 277#define DEV_CONFIG_CDC 278#endif 279 280#ifdef CONFIG_USB_GADGET_ATMEL_USBA 281#define DEV_CONFIG_CDC 282#endif 283 284#ifdef CONFIG_USB_GADGET_FSL_USB2 285#define DEV_CONFIG_CDC 286#endif 287 288/* For CDC-incapable hardware, choose the simple cdc subset. 289 * Anything that talks bulk (without notable bugs) can do this. 290 */ 291#ifdef CONFIG_USB_GADGET_PXA2XX 292#define DEV_CONFIG_SUBSET 293#endif 294 295#ifdef CONFIG_USB_GADGET_SUPERH 296#define DEV_CONFIG_SUBSET 297#endif 298 299#ifdef CONFIG_USB_GADGET_SA1100 300/* use non-CDC for backwards compatibility */ 301#define DEV_CONFIG_SUBSET 302#endif 303 304#ifdef CONFIG_USB_GADGET_M66592 305#define DEV_CONFIG_CDC 306#endif 307 308 309/*-------------------------------------------------------------------------*/ 310 311/* "main" config is either CDC, or its simple subset */ 312static inline int is_cdc(struct eth_dev *dev) 313{ 314#if !defined(DEV_CONFIG_SUBSET) 315 return 1; /* only cdc possible */ 316#elif !defined (DEV_CONFIG_CDC) 317 return 0; /* only subset possible */ 318#else 319 return dev->cdc; /* depends on what hardware we found */ 320#endif 321} 322 323/* "secondary" RNDIS config may sometimes be activated */ 324static inline int rndis_active(struct eth_dev *dev) 325{ 326#ifdef CONFIG_USB_ETH_RNDIS 327 return dev->rndis; 328#else 329 return 0; 330#endif 331} 332 333#define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev)) 334#define cdc_active(dev) ( is_cdc(dev) && !rndis_active(dev)) 335 336 337 338#define DEFAULT_QLEN 2 /* double buffering by default */ 339 340/* peak bulk transfer bits-per-second */ 341#define HS_BPS (13 * 512 * 8 * 1000 * 8) 342#define FS_BPS (19 * 64 * 1 * 1000 * 8) 343 344#ifdef CONFIG_USB_GADGET_DUALSPEED 345#define DEVSPEED USB_SPEED_HIGH 346 347static unsigned qmult = 5; 348module_param (qmult, uint, S_IRUGO|S_IWUSR); 349 350 351/* for dual-speed hardware, use deeper queues at highspeed */ 352#define qlen(gadget) \ 353 (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1)) 354 355/* also defer IRQs on highspeed TX */ 356#define TX_DELAY qmult 357 358static inline int BITRATE(struct usb_gadget *g) 359{ 360 return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS; 361} 362 363#else /* full speed (low speed doesn't do bulk) */ 364#define DEVSPEED USB_SPEED_FULL 365 366#define qlen(gadget) DEFAULT_QLEN 367 368static inline int BITRATE(struct usb_gadget *g) 369{ 370 return FS_BPS; 371} 372#endif 373 374 375/*-------------------------------------------------------------------------*/ 376 377#define xprintk(d,level,fmt,args...) \ 378 printk(level "%s: " fmt , (d)->net->name , ## args) 379 380#ifdef DEBUG 381#undef DEBUG 382#define DEBUG(dev,fmt,args...) \ 383 xprintk(dev , KERN_DEBUG , fmt , ## args) 384#else 385#define DEBUG(dev,fmt,args...) \ 386 do { } while (0) 387#endif /* DEBUG */ 388 389#ifdef VERBOSE 390#define VDEBUG DEBUG 391#else 392#define VDEBUG(dev,fmt,args...) \ 393 do { } while (0) 394#endif /* DEBUG */ 395 396#define ERROR(dev,fmt,args...) \ 397 xprintk(dev , KERN_ERR , fmt , ## args) 398#define WARN(dev,fmt,args...) \ 399 xprintk(dev , KERN_WARNING , fmt , ## args) 400#define INFO(dev,fmt,args...) \ 401 xprintk(dev , KERN_INFO , fmt , ## args) 402 403/*-------------------------------------------------------------------------*/ 404 405/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly 406 * ep0 implementation: descriptors, config management, setup(). 407 * also optional class-specific notification interrupt transfer. 408 */ 409 410/* 411 * DESCRIPTORS ... most are static, but strings and (full) configuration 412 * descriptors are built on demand. For now we do either full CDC, or 413 * our simple subset, with RNDIS as an optional second configuration. 414 * 415 * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But 416 * the class descriptors match a modem (they're ignored; it's really just 417 * Ethernet functionality), they don't need the NOP altsetting, and the 418 * status transfer endpoint isn't optional. 419 */ 420 421#define STRING_MANUFACTURER 1 422#define STRING_PRODUCT 2 423#define STRING_ETHADDR 3 424#define STRING_DATA 4 425#define STRING_CONTROL 5 426#define STRING_RNDIS_CONTROL 6 427#define STRING_CDC 7 428#define STRING_SUBSET 8 429#define STRING_RNDIS 9 430#define STRING_SERIALNUMBER 10 431 432/* holds our biggest descriptor (or RNDIS response) */ 433#define USB_BUFSIZ 256 434 435/* 436 * This device advertises one configuration, eth_config, unless RNDIS 437 * is enabled (rndis_config) on hardware supporting at least two configs. 438 * 439 * NOTE: Controllers like superh_udc should probably be able to use 440 * an RNDIS-only configuration. 441 * 442 * FIXME define some higher-powered configurations to make it easier 443 * to recharge batteries ... 444 */ 445 446#define DEV_CONFIG_VALUE 1 /* cdc or subset */ 447#define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */ 448 449static struct usb_device_descriptor 450device_desc = { 451 .bLength = sizeof device_desc, 452 .bDescriptorType = USB_DT_DEVICE, 453 454 .bcdUSB = __constant_cpu_to_le16 (0x0200), 455 456 .bDeviceClass = USB_CLASS_COMM, 457 .bDeviceSubClass = 0, 458 .bDeviceProtocol = 0, 459 460 .idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM), 461 .idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM), 462 .iManufacturer = STRING_MANUFACTURER, 463 .iProduct = STRING_PRODUCT, 464 .bNumConfigurations = 1, 465}; 466 467static struct usb_otg_descriptor 468otg_descriptor = { 469 .bLength = sizeof otg_descriptor, 470 .bDescriptorType = USB_DT_OTG, 471 472 .bmAttributes = USB_OTG_SRP, 473}; 474 475static struct usb_config_descriptor 476eth_config = { 477 .bLength = sizeof eth_config, 478 .bDescriptorType = USB_DT_CONFIG, 479 480 /* compute wTotalLength on the fly */ 481 .bNumInterfaces = 2, 482 .bConfigurationValue = DEV_CONFIG_VALUE, 483 .iConfiguration = STRING_CDC, 484 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 485 .bMaxPower = 50, 486}; 487 488#ifdef CONFIG_USB_ETH_RNDIS 489static struct usb_config_descriptor 490rndis_config = { 491 .bLength = sizeof rndis_config, 492 .bDescriptorType = USB_DT_CONFIG, 493 494 /* compute wTotalLength on the fly */ 495 .bNumInterfaces = 2, 496 .bConfigurationValue = DEV_RNDIS_CONFIG_VALUE, 497 .iConfiguration = STRING_RNDIS, 498 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 499 .bMaxPower = 50, 500}; 501#endif 502 503/* 504 * Compared to the simple CDC subset, the full CDC Ethernet model adds 505 * three class descriptors, two interface descriptors, optional status 506 * endpoint. Both have a "data" interface and two bulk endpoints. 507 * There are also differences in how control requests are handled. 508 * 509 * RNDIS shares a lot with CDC-Ethernet, since it's a variant of the 510 * CDC-ACM (modem) spec. Unfortunately MSFT's RNDIS driver is buggy; it 511 * may hang or oops. Since bugfixes (or accurate specs, letting Linux 512 * work around those bugs) are unlikely to ever come from MSFT, you may 513 * wish to avoid using RNDIS. 514 * 515 * MCCI offers an alternative to RNDIS if you need to connect to Windows 516 * but have hardware that can't support CDC Ethernet. We add descriptors 517 * to present the CDC Subset as a (nonconformant) CDC MDLM variant called 518 * "SAFE". That borrows from both CDC Ethernet and CDC MDLM. You can 519 * get those drivers from MCCI, or bundled with various products. 520 */ 521 522#ifdef DEV_CONFIG_CDC 523static struct usb_interface_descriptor 524control_intf = { 525 .bLength = sizeof control_intf, 526 .bDescriptorType = USB_DT_INTERFACE, 527 528 .bInterfaceNumber = 0, 529 /* status endpoint is optional; this may be patched later */ 530 .bNumEndpoints = 1, 531 .bInterfaceClass = USB_CLASS_COMM, 532 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, 533 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 534 .iInterface = STRING_CONTROL, 535}; 536#endif 537 538#ifdef CONFIG_USB_ETH_RNDIS 539static const struct usb_interface_descriptor 540rndis_control_intf = { 541 .bLength = sizeof rndis_control_intf, 542 .bDescriptorType = USB_DT_INTERFACE, 543 544 .bInterfaceNumber = 0, 545 .bNumEndpoints = 1, 546 .bInterfaceClass = USB_CLASS_COMM, 547 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, 548 .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR, 549 .iInterface = STRING_RNDIS_CONTROL, 550}; 551#endif 552 553static const struct usb_cdc_header_desc header_desc = { 554 .bLength = sizeof header_desc, 555 .bDescriptorType = USB_DT_CS_INTERFACE, 556 .bDescriptorSubType = USB_CDC_HEADER_TYPE, 557 558 .bcdCDC = __constant_cpu_to_le16 (0x0110), 559}; 560 561#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 562 563static const struct usb_cdc_union_desc union_desc = { 564 .bLength = sizeof union_desc, 565 .bDescriptorType = USB_DT_CS_INTERFACE, 566 .bDescriptorSubType = USB_CDC_UNION_TYPE, 567 568 .bMasterInterface0 = 0, /* index of control interface */ 569 .bSlaveInterface0 = 1, /* index of DATA interface */ 570}; 571 572#endif /* CDC || RNDIS */ 573 574#ifdef CONFIG_USB_ETH_RNDIS 575 576static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = { 577 .bLength = sizeof call_mgmt_descriptor, 578 .bDescriptorType = USB_DT_CS_INTERFACE, 579 .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, 580 581 .bmCapabilities = 0x00, 582 .bDataInterface = 0x01, 583}; 584 585static const struct usb_cdc_acm_descriptor acm_descriptor = { 586 .bLength = sizeof acm_descriptor, 587 .bDescriptorType = USB_DT_CS_INTERFACE, 588 .bDescriptorSubType = USB_CDC_ACM_TYPE, 589 590 .bmCapabilities = 0x00, 591}; 592 593#endif 594 595#ifndef DEV_CONFIG_CDC 596 597/* "SAFE" loosely follows CDC WMC MDLM, violating the spec in various 598 * ways: data endpoints live in the control interface, there's no data 599 * interface, and it's not used to talk to a cell phone radio. 600 */ 601 602static const struct usb_cdc_mdlm_desc mdlm_desc = { 603 .bLength = sizeof mdlm_desc, 604 .bDescriptorType = USB_DT_CS_INTERFACE, 605 .bDescriptorSubType = USB_CDC_MDLM_TYPE, 606 607 .bcdVersion = __constant_cpu_to_le16(0x0100), 608 .bGUID = { 609 0x5d, 0x34, 0xcf, 0x66, 0x11, 0x18, 0x11, 0xd6, 610 0xa2, 0x1a, 0x00, 0x01, 0x02, 0xca, 0x9a, 0x7f, 611 }, 612}; 613 614/* since "usb_cdc_mdlm_detail_desc" is a variable length structure, we 615 * can't really use its struct. All we do here is say that we're using 616 * the submode of "SAFE" which directly matches the CDC Subset. 617 */ 618static const u8 mdlm_detail_desc[] = { 619 6, 620 USB_DT_CS_INTERFACE, 621 USB_CDC_MDLM_DETAIL_TYPE, 622 623 0, /* "SAFE" */ 624 0, /* network control capabilities (none) */ 625 0, /* network data capabilities ("raw" encapsulation) */ 626}; 627 628#endif 629 630static const struct usb_cdc_ether_desc ether_desc = { 631 .bLength = sizeof ether_desc, 632 .bDescriptorType = USB_DT_CS_INTERFACE, 633 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE, 634 635 /* this descriptor actually adds value, surprise! */ 636 .iMACAddress = STRING_ETHADDR, 637 .bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */ 638 .wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN), 639 .wNumberMCFilters = __constant_cpu_to_le16 (0), 640 .bNumberPowerFilters = 0, 641}; 642 643 644#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 645 646/* include the status endpoint if we can, even where it's optional. 647 * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one 648 * packet, to simplify cancellation; and a big transfer interval, to 649 * waste less bandwidth. 650 * 651 * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even 652 * if they ignore the connect/disconnect notifications that real aether 653 * can provide. more advanced cdc configurations might want to support 654 * encapsulated commands (vendor-specific, using control-OUT). 655 * 656 * RNDIS requires the status endpoint, since it uses that encapsulation 657 * mechanism for its funky RPC scheme. 658 */ 659 660#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */ 661#define STATUS_BYTECOUNT 16 /* 8 byte header + data */ 662 663static struct usb_endpoint_descriptor 664fs_status_desc = { 665 .bLength = USB_DT_ENDPOINT_SIZE, 666 .bDescriptorType = USB_DT_ENDPOINT, 667 668 .bEndpointAddress = USB_DIR_IN, 669 .bmAttributes = USB_ENDPOINT_XFER_INT, 670 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT), 671 .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, 672}; 673#endif 674 675#ifdef DEV_CONFIG_CDC 676 677/* the default data interface has no endpoints ... */ 678 679static const struct usb_interface_descriptor 680data_nop_intf = { 681 .bLength = sizeof data_nop_intf, 682 .bDescriptorType = USB_DT_INTERFACE, 683 684 .bInterfaceNumber = 1, 685 .bAlternateSetting = 0, 686 .bNumEndpoints = 0, 687 .bInterfaceClass = USB_CLASS_CDC_DATA, 688 .bInterfaceSubClass = 0, 689 .bInterfaceProtocol = 0, 690}; 691 692/* ... but the "real" data interface has two bulk endpoints */ 693 694static const struct usb_interface_descriptor 695data_intf = { 696 .bLength = sizeof data_intf, 697 .bDescriptorType = USB_DT_INTERFACE, 698 699 .bInterfaceNumber = 1, 700 .bAlternateSetting = 1, 701 .bNumEndpoints = 2, 702 .bInterfaceClass = USB_CLASS_CDC_DATA, 703 .bInterfaceSubClass = 0, 704 .bInterfaceProtocol = 0, 705 .iInterface = STRING_DATA, 706}; 707 708#endif 709 710#ifdef CONFIG_USB_ETH_RNDIS 711 712/* RNDIS doesn't activate by changing to the "real" altsetting */ 713 714static const struct usb_interface_descriptor 715rndis_data_intf = { 716 .bLength = sizeof rndis_data_intf, 717 .bDescriptorType = USB_DT_INTERFACE, 718 719 .bInterfaceNumber = 1, 720 .bAlternateSetting = 0, 721 .bNumEndpoints = 2, 722 .bInterfaceClass = USB_CLASS_CDC_DATA, 723 .bInterfaceSubClass = 0, 724 .bInterfaceProtocol = 0, 725 .iInterface = STRING_DATA, 726}; 727 728#endif 729 730#ifdef DEV_CONFIG_SUBSET 731 732/* 733 * "Simple" CDC-subset option is a simple vendor-neutral model that most 734 * full speed controllers can handle: one interface, two bulk endpoints. 735 * 736 * To assist host side drivers, we fancy it up a bit, and add descriptors 737 * so some host side drivers will understand it as a "SAFE" variant. 738 */ 739 740static const struct usb_interface_descriptor 741subset_data_intf = { 742 .bLength = sizeof subset_data_intf, 743 .bDescriptorType = USB_DT_INTERFACE, 744 745 .bInterfaceNumber = 0, 746 .bAlternateSetting = 0, 747 .bNumEndpoints = 2, 748 .bInterfaceClass = USB_CLASS_COMM, 749 .bInterfaceSubClass = USB_CDC_SUBCLASS_MDLM, 750 .bInterfaceProtocol = 0, 751 .iInterface = STRING_DATA, 752}; 753 754#endif /* SUBSET */ 755 756 757static struct usb_endpoint_descriptor 758fs_source_desc = { 759 .bLength = USB_DT_ENDPOINT_SIZE, 760 .bDescriptorType = USB_DT_ENDPOINT, 761 762 .bEndpointAddress = USB_DIR_IN, 763 .bmAttributes = USB_ENDPOINT_XFER_BULK, 764}; 765 766static struct usb_endpoint_descriptor 767fs_sink_desc = { 768 .bLength = USB_DT_ENDPOINT_SIZE, 769 .bDescriptorType = USB_DT_ENDPOINT, 770 771 .bEndpointAddress = USB_DIR_OUT, 772 .bmAttributes = USB_ENDPOINT_XFER_BULK, 773}; 774 775static const struct usb_descriptor_header *fs_eth_function [11] = { 776 (struct usb_descriptor_header *) &otg_descriptor, 777#ifdef DEV_CONFIG_CDC 778 /* "cdc" mode descriptors */ 779 (struct usb_descriptor_header *) &control_intf, 780 (struct usb_descriptor_header *) &header_desc, 781 (struct usb_descriptor_header *) &union_desc, 782 (struct usb_descriptor_header *) ðer_desc, 783 /* NOTE: status endpoint may need to be removed */ 784 (struct usb_descriptor_header *) &fs_status_desc, 785 /* data interface, with altsetting */ 786 (struct usb_descriptor_header *) &data_nop_intf, 787 (struct usb_descriptor_header *) &data_intf, 788 (struct usb_descriptor_header *) &fs_source_desc, 789 (struct usb_descriptor_header *) &fs_sink_desc, 790 NULL, 791#endif /* DEV_CONFIG_CDC */ 792}; 793 794static inline void __init fs_subset_descriptors(void) 795{ 796#ifdef DEV_CONFIG_SUBSET 797 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */ 798 fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf; 799 fs_eth_function[2] = (struct usb_descriptor_header *) &header_desc; 800 fs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc; 801 fs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc; 802 fs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc; 803 fs_eth_function[6] = (struct usb_descriptor_header *) &fs_source_desc; 804 fs_eth_function[7] = (struct usb_descriptor_header *) &fs_sink_desc; 805 fs_eth_function[8] = NULL; 806#else 807 fs_eth_function[1] = NULL; 808#endif 809} 810 811#ifdef CONFIG_USB_ETH_RNDIS 812static const struct usb_descriptor_header *fs_rndis_function [] = { 813 (struct usb_descriptor_header *) &otg_descriptor, 814 /* control interface matches ACM, not Ethernet */ 815 (struct usb_descriptor_header *) &rndis_control_intf, 816 (struct usb_descriptor_header *) &header_desc, 817 (struct usb_descriptor_header *) &call_mgmt_descriptor, 818 (struct usb_descriptor_header *) &acm_descriptor, 819 (struct usb_descriptor_header *) &union_desc, 820 (struct usb_descriptor_header *) &fs_status_desc, 821 /* data interface has no altsetting */ 822 (struct usb_descriptor_header *) &rndis_data_intf, 823 (struct usb_descriptor_header *) &fs_source_desc, 824 (struct usb_descriptor_header *) &fs_sink_desc, 825 NULL, 826}; 827#endif 828 829#ifdef CONFIG_USB_GADGET_DUALSPEED 830 831/* 832 * usb 2.0 devices need to expose both high speed and full speed 833 * descriptors, unless they only run at full speed. 834 */ 835 836#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 837static struct usb_endpoint_descriptor 838hs_status_desc = { 839 .bLength = USB_DT_ENDPOINT_SIZE, 840 .bDescriptorType = USB_DT_ENDPOINT, 841 842 .bmAttributes = USB_ENDPOINT_XFER_INT, 843 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT), 844 .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, 845}; 846#endif /* DEV_CONFIG_CDC */ 847 848static struct usb_endpoint_descriptor 849hs_source_desc = { 850 .bLength = USB_DT_ENDPOINT_SIZE, 851 .bDescriptorType = USB_DT_ENDPOINT, 852 853 .bmAttributes = USB_ENDPOINT_XFER_BULK, 854 .wMaxPacketSize = __constant_cpu_to_le16 (512), 855}; 856 857static struct usb_endpoint_descriptor 858hs_sink_desc = { 859 .bLength = USB_DT_ENDPOINT_SIZE, 860 .bDescriptorType = USB_DT_ENDPOINT, 861 862 .bmAttributes = USB_ENDPOINT_XFER_BULK, 863 .wMaxPacketSize = __constant_cpu_to_le16 (512), 864}; 865 866static struct usb_qualifier_descriptor 867dev_qualifier = { 868 .bLength = sizeof dev_qualifier, 869 .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 870 871 .bcdUSB = __constant_cpu_to_le16 (0x0200), 872 .bDeviceClass = USB_CLASS_COMM, 873 874 .bNumConfigurations = 1, 875}; 876 877static const struct usb_descriptor_header *hs_eth_function [11] = { 878 (struct usb_descriptor_header *) &otg_descriptor, 879#ifdef DEV_CONFIG_CDC 880 /* "cdc" mode descriptors */ 881 (struct usb_descriptor_header *) &control_intf, 882 (struct usb_descriptor_header *) &header_desc, 883 (struct usb_descriptor_header *) &union_desc, 884 (struct usb_descriptor_header *) ðer_desc, 885 /* NOTE: status endpoint may need to be removed */ 886 (struct usb_descriptor_header *) &hs_status_desc, 887 /* data interface, with altsetting */ 888 (struct usb_descriptor_header *) &data_nop_intf, 889 (struct usb_descriptor_header *) &data_intf, 890 (struct usb_descriptor_header *) &hs_source_desc, 891 (struct usb_descriptor_header *) &hs_sink_desc, 892 NULL, 893#endif /* DEV_CONFIG_CDC */ 894}; 895 896static inline void __init hs_subset_descriptors(void) 897{ 898#ifdef DEV_CONFIG_SUBSET 899 /* behavior is "CDC Subset"; extra descriptors say "SAFE" */ 900 hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf; 901 hs_eth_function[2] = (struct usb_descriptor_header *) &header_desc; 902 hs_eth_function[3] = (struct usb_descriptor_header *) &mdlm_desc; 903 hs_eth_function[4] = (struct usb_descriptor_header *) &mdlm_detail_desc; 904 hs_eth_function[5] = (struct usb_descriptor_header *) ðer_desc; 905 hs_eth_function[6] = (struct usb_descriptor_header *) &hs_source_desc; 906 hs_eth_function[7] = (struct usb_descriptor_header *) &hs_sink_desc; 907 hs_eth_function[8] = NULL; 908#else 909 hs_eth_function[1] = NULL; 910#endif 911} 912 913#ifdef CONFIG_USB_ETH_RNDIS 914static const struct usb_descriptor_header *hs_rndis_function [] = { 915 (struct usb_descriptor_header *) &otg_descriptor, 916 /* control interface matches ACM, not Ethernet */ 917 (struct usb_descriptor_header *) &rndis_control_intf, 918 (struct usb_descriptor_header *) &header_desc, 919 (struct usb_descriptor_header *) &call_mgmt_descriptor, 920 (struct usb_descriptor_header *) &acm_descriptor, 921 (struct usb_descriptor_header *) &union_desc, 922 (struct usb_descriptor_header *) &hs_status_desc, 923 /* data interface has no altsetting */ 924 (struct usb_descriptor_header *) &rndis_data_intf, 925 (struct usb_descriptor_header *) &hs_source_desc, 926 (struct usb_descriptor_header *) &hs_sink_desc, 927 NULL, 928}; 929#endif 930 931 932/* maxpacket and other transfer characteristics vary by speed. */ 933#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs)) 934 935#else 936 937/* if there's no high speed support, maxpacket doesn't change. */ 938#define ep_desc(g,hs,fs) (((void)(g)), (fs)) 939 940static inline void __init hs_subset_descriptors(void) 941{ 942} 943 944#endif /* !CONFIG_USB_GADGET_DUALSPEED */ 945 946/*-------------------------------------------------------------------------*/ 947 948/* descriptors that are built on-demand */ 949 950static char manufacturer [50]; 951static char product_desc [40] = DRIVER_DESC; 952static char serial_number [20]; 953 954/* address that the host will use ... usually assigned at random */ 955static char ethaddr [2 * ETH_ALEN + 1]; 956 957/* static strings, in UTF-8 */ 958static struct usb_string strings [] = { 959 { STRING_MANUFACTURER, manufacturer, }, 960 { STRING_PRODUCT, product_desc, }, 961 { STRING_SERIALNUMBER, serial_number, }, 962 { STRING_DATA, "Ethernet Data", }, 963 { STRING_ETHADDR, ethaddr, }, 964#ifdef DEV_CONFIG_CDC 965 { STRING_CDC, "CDC Ethernet", }, 966 { STRING_CONTROL, "CDC Communications Control", }, 967#endif 968#ifdef DEV_CONFIG_SUBSET 969 { STRING_SUBSET, "CDC Ethernet Subset", }, 970#endif 971#ifdef CONFIG_USB_ETH_RNDIS 972 { STRING_RNDIS, "RNDIS", }, 973 { STRING_RNDIS_CONTROL, "RNDIS Communications Control", }, 974#endif 975 { } /* end of list */ 976}; 977 978static struct usb_gadget_strings stringtab = { 979 .language = 0x0409, /* en-us */ 980 .strings = strings, 981}; 982 983/* 984 * one config, two interfaces: control, data. 985 * complications: class descriptors, and an altsetting. 986 */ 987static int 988config_buf (enum usb_device_speed speed, 989 u8 *buf, u8 type, 990 unsigned index, int is_otg) 991{ 992 int len; 993 const struct usb_config_descriptor *config; 994 const struct usb_descriptor_header **function; 995#ifdef CONFIG_USB_GADGET_DUALSPEED 996 int hs = (speed == USB_SPEED_HIGH); 997 998 if (type == USB_DT_OTHER_SPEED_CONFIG) 999 hs = !hs; 1000#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function) 1001#else 1002#define which_fn(t) (fs_ ## t ## _function) 1003#endif 1004 1005 if (index >= device_desc.bNumConfigurations) 1006 return -EINVAL; 1007 1008#ifdef CONFIG_USB_ETH_RNDIS 1009 /* list the RNDIS config first, to make Microsoft's drivers 1010 * happy. DOCSIS 1.0 needs this too. 1011 */ 1012 if (device_desc.bNumConfigurations == 2 && index == 0) { 1013 config = &rndis_config; 1014 function = which_fn (rndis); 1015 } else 1016#endif 1017 { 1018 config = ð_config; 1019 function = which_fn (eth); 1020 } 1021 1022 /* for now, don't advertise srp-only devices */ 1023 if (!is_otg) 1024 function++; 1025 1026 len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function); 1027 if (len < 0) 1028 return len; 1029 ((struct usb_config_descriptor *) buf)->bDescriptorType = type; 1030 return len; 1031} 1032 1033/*-------------------------------------------------------------------------*/ 1034 1035static void eth_start (struct eth_dev *dev, gfp_t gfp_flags); 1036static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags); 1037 1038static int 1039set_ether_config (struct eth_dev *dev, gfp_t gfp_flags) 1040{ 1041 int result = 0; 1042 struct usb_gadget *gadget = dev->gadget; 1043 1044#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 1045 /* status endpoint used for RNDIS and (optionally) CDC */ 1046 if (!subset_active(dev) && dev->status_ep) { 1047 dev->status = ep_desc (gadget, &hs_status_desc, 1048 &fs_status_desc); 1049 dev->status_ep->driver_data = dev; 1050 1051 result = usb_ep_enable (dev->status_ep, dev->status); 1052 if (result != 0) { 1053 DEBUG (dev, "enable %s --> %d\n", 1054 dev->status_ep->name, result); 1055 goto done; 1056 } 1057 } 1058#endif 1059 1060 dev->in = ep_desc(gadget, &hs_source_desc, &fs_source_desc); 1061 dev->in_ep->driver_data = dev; 1062 1063 dev->out = ep_desc(gadget, &hs_sink_desc, &fs_sink_desc); 1064 dev->out_ep->driver_data = dev; 1065 1066 /* With CDC, the host isn't allowed to use these two data 1067 * endpoints in the default altsetting for the interface. 1068 * so we don't activate them yet. Reset from SET_INTERFACE. 1069 * 1070 * Strictly speaking RNDIS should work the same: activation is 1071 * a side effect of setting a packet filter. Deactivation is 1072 * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG. 1073 */ 1074 if (!cdc_active(dev)) { 1075 result = usb_ep_enable (dev->in_ep, dev->in); 1076 if (result != 0) { 1077 DEBUG(dev, "enable %s --> %d\n", 1078 dev->in_ep->name, result); 1079 goto done; 1080 } 1081 1082 result = usb_ep_enable (dev->out_ep, dev->out); 1083 if (result != 0) { 1084 DEBUG (dev, "enable %s --> %d\n", 1085 dev->out_ep->name, result); 1086 goto done; 1087 } 1088 } 1089 1090done: 1091 if (result == 0) 1092 result = alloc_requests (dev, qlen (gadget), gfp_flags); 1093 1094 /* on error, disable any endpoints */ 1095 if (result < 0) { 1096 if (!subset_active(dev)) 1097 (void) usb_ep_disable (dev->status_ep); 1098 dev->status = NULL; 1099 (void) usb_ep_disable (dev->in_ep); 1100 (void) usb_ep_disable (dev->out_ep); 1101 dev->in = NULL; 1102 dev->out = NULL; 1103 } else 1104 1105 /* activate non-CDC configs right away 1106 * this isn't strictly according to the RNDIS spec 1107 */ 1108 if (!cdc_active (dev)) { 1109 netif_carrier_on (dev->net); 1110 if (netif_running (dev->net)) { 1111 spin_unlock (&dev->lock); 1112 eth_start (dev, GFP_ATOMIC); 1113 spin_lock (&dev->lock); 1114 } 1115 } 1116 1117 if (result == 0) 1118 DEBUG (dev, "qlen %d\n", qlen (gadget)); 1119 1120 /* caller is responsible for cleanup on error */ 1121 return result; 1122} 1123 1124static void eth_reset_config (struct eth_dev *dev) 1125{ 1126 struct usb_request *req; 1127 1128 if (dev->config == 0) 1129 return; 1130 1131 DEBUG (dev, "%s\n", __FUNCTION__); 1132 1133 netif_stop_queue (dev->net); 1134 netif_carrier_off (dev->net); 1135 rndis_uninit(dev->rndis_config); 1136 1137 /* disable endpoints, forcing (synchronous) completion of 1138 * pending i/o. then free the requests. 1139 */ 1140 if (dev->in) { 1141 usb_ep_disable (dev->in_ep); 1142 spin_lock(&dev->req_lock); 1143 while (likely (!list_empty (&dev->tx_reqs))) { 1144 req = container_of (dev->tx_reqs.next, 1145 struct usb_request, list); 1146 list_del (&req->list); 1147 1148 spin_unlock(&dev->req_lock); 1149 usb_ep_free_request (dev->in_ep, req); 1150 spin_lock(&dev->req_lock); 1151 } 1152 spin_unlock(&dev->req_lock); 1153 } 1154 if (dev->out) { 1155 usb_ep_disable (dev->out_ep); 1156 spin_lock(&dev->req_lock); 1157 while (likely (!list_empty (&dev->rx_reqs))) { 1158 req = container_of (dev->rx_reqs.next, 1159 struct usb_request, list); 1160 list_del (&req->list); 1161 1162 spin_unlock(&dev->req_lock); 1163 usb_ep_free_request (dev->out_ep, req); 1164 spin_lock(&dev->req_lock); 1165 } 1166 spin_unlock(&dev->req_lock); 1167 } 1168 1169 if (dev->status) { 1170 usb_ep_disable (dev->status_ep); 1171 } 1172 dev->rndis = 0; 1173 dev->cdc_filter = 0; 1174 dev->config = 0; 1175} 1176 1177/* change our operational config. must agree with the code 1178 * that returns config descriptors, and altsetting code. 1179 */ 1180static int 1181eth_set_config (struct eth_dev *dev, unsigned number, gfp_t gfp_flags) 1182{ 1183 int result = 0; 1184 struct usb_gadget *gadget = dev->gadget; 1185 1186 if (gadget_is_sa1100 (gadget) 1187 && dev->config 1188 && atomic_read (&dev->tx_qlen) != 0) { 1189 /* tx fifo is full, but we can't clear it...*/ 1190 INFO (dev, "can't change configurations\n"); 1191 return -ESPIPE; 1192 } 1193 eth_reset_config (dev); 1194 1195 switch (number) { 1196 case DEV_CONFIG_VALUE: 1197 result = set_ether_config (dev, gfp_flags); 1198 break; 1199#ifdef CONFIG_USB_ETH_RNDIS 1200 case DEV_RNDIS_CONFIG_VALUE: 1201 dev->rndis = 1; 1202 result = set_ether_config (dev, gfp_flags); 1203 break; 1204#endif 1205 default: 1206 result = -EINVAL; 1207 /* FALL THROUGH */ 1208 case 0: 1209 break; 1210 } 1211 1212 if (result) { 1213 if (number) 1214 eth_reset_config (dev); 1215 usb_gadget_vbus_draw(dev->gadget, 1216 dev->gadget->is_otg ? 8 : 100); 1217 } else { 1218 char *speed; 1219 unsigned power; 1220 1221 power = 2 * eth_config.bMaxPower; 1222 usb_gadget_vbus_draw(dev->gadget, power); 1223 1224 switch (gadget->speed) { 1225 case USB_SPEED_FULL: speed = "full"; break; 1226#ifdef CONFIG_USB_GADGET_DUALSPEED 1227 case USB_SPEED_HIGH: speed = "high"; break; 1228#endif 1229 default: speed = "?"; break; 1230 } 1231 1232 dev->config = number; 1233 INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n", 1234 speed, number, power, driver_desc, 1235 rndis_active(dev) 1236 ? "RNDIS" 1237 : (cdc_active(dev) 1238 ? "CDC Ethernet" 1239 : "CDC Ethernet Subset")); 1240 } 1241 return result; 1242} 1243 1244/*-------------------------------------------------------------------------*/ 1245 1246#ifdef DEV_CONFIG_CDC 1247 1248/* The interrupt endpoint is used in CDC networking models (Ethernet, ATM) 1249 * only to notify the host about link status changes (which we support) or 1250 * report completion of some encapsulated command (as used in RNDIS). Since 1251 * we want this CDC Ethernet code to be vendor-neutral, we don't use that 1252 * command mechanism; and only one status request is ever queued. 1253 */ 1254 1255static void eth_status_complete (struct usb_ep *ep, struct usb_request *req) 1256{ 1257 struct usb_cdc_notification *event = req->buf; 1258 int value = req->status; 1259 struct eth_dev *dev = ep->driver_data; 1260 1261 /* issue the second notification if host reads the first */ 1262 if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION 1263 && value == 0) { 1264 __le32 *data = req->buf + sizeof *event; 1265 1266 event->bmRequestType = 0xA1; 1267 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE; 1268 event->wValue = __constant_cpu_to_le16 (0); 1269 event->wIndex = __constant_cpu_to_le16 (1); 1270 event->wLength = __constant_cpu_to_le16 (8); 1271 1272 /* SPEED_CHANGE data is up/down speeds in bits/sec */ 1273 data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget)); 1274 1275 req->length = STATUS_BYTECOUNT; 1276 value = usb_ep_queue (ep, req, GFP_ATOMIC); 1277 DEBUG (dev, "send SPEED_CHANGE --> %d\n", value); 1278 if (value == 0) 1279 return; 1280 } else if (value != -ECONNRESET) 1281 DEBUG (dev, "event %02x --> %d\n", 1282 event->bNotificationType, value); 1283 req->context = NULL; 1284} 1285 1286static void issue_start_status (struct eth_dev *dev) 1287{ 1288 struct usb_request *req = dev->stat_req; 1289 struct usb_cdc_notification *event; 1290 int value; 1291 1292 DEBUG (dev, "%s, flush old status first\n", __FUNCTION__); 1293 1294 /* flush old status 1295 * 1296 * FIXME ugly idiom, maybe we'd be better with just 1297 * a "cancel the whole queue" primitive since any 1298 * unlink-one primitive has way too many error modes. 1299 * here, we "know" toggle is already clear... 1300 * 1301 * FIXME iff req->context != null just dequeue it 1302 */ 1303 usb_ep_disable (dev->status_ep); 1304 usb_ep_enable (dev->status_ep, dev->status); 1305 1306 /* 3.8.1 says to issue first NETWORK_CONNECTION, then 1307 * a SPEED_CHANGE. could be useful in some configs. 1308 */ 1309 event = req->buf; 1310 event->bmRequestType = 0xA1; 1311 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION; 1312 event->wValue = __constant_cpu_to_le16 (1); /* connected */ 1313 event->wIndex = __constant_cpu_to_le16 (1); 1314 event->wLength = 0; 1315 1316 req->length = sizeof *event; 1317 req->complete = eth_status_complete; 1318 req->context = dev; 1319 1320 value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC); 1321 if (value < 0) 1322 DEBUG (dev, "status buf queue --> %d\n", value); 1323} 1324 1325#endif 1326 1327/*-------------------------------------------------------------------------*/ 1328 1329static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req) 1330{ 1331 if (req->status || req->actual != req->length) 1332 DEBUG ((struct eth_dev *) ep->driver_data, 1333 "setup complete --> %d, %d/%d\n", 1334 req->status, req->actual, req->length); 1335} 1336 1337#ifdef CONFIG_USB_ETH_RNDIS 1338 1339static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req) 1340{ 1341 if (req->status || req->actual != req->length) 1342 DEBUG ((struct eth_dev *) ep->driver_data, 1343 "rndis response complete --> %d, %d/%d\n", 1344 req->status, req->actual, req->length); 1345 1346 /* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */ 1347} 1348 1349static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req) 1350{ 1351 struct eth_dev *dev = ep->driver_data; 1352 int status; 1353 1354 /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */ 1355 spin_lock(&dev->lock); 1356 status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf); 1357 if (status < 0) 1358 ERROR(dev, "%s: rndis parse error %d\n", __FUNCTION__, status); 1359 spin_unlock(&dev->lock); 1360} 1361 1362#endif /* RNDIS */ 1363 1364/* 1365 * The setup() callback implements all the ep0 functionality that's not 1366 * handled lower down. CDC has a number of less-common features: 1367 * 1368 * - two interfaces: control, and ethernet data 1369 * - Ethernet data interface has two altsettings: default, and active 1370 * - class-specific descriptors for the control interface 1371 * - class-specific control requests 1372 */ 1373static int 1374eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) 1375{ 1376 struct eth_dev *dev = get_gadget_data (gadget); 1377 struct usb_request *req = dev->req; 1378 int value = -EOPNOTSUPP; 1379 u16 wIndex = le16_to_cpu(ctrl->wIndex); 1380 u16 wValue = le16_to_cpu(ctrl->wValue); 1381 u16 wLength = le16_to_cpu(ctrl->wLength); 1382 1383 /* descriptors just go into the pre-allocated ep0 buffer, 1384 * while config change events may enable network traffic. 1385 */ 1386 req->complete = eth_setup_complete; 1387 switch (ctrl->bRequest) { 1388 1389 case USB_REQ_GET_DESCRIPTOR: 1390 if (ctrl->bRequestType != USB_DIR_IN) 1391 break; 1392 switch (wValue >> 8) { 1393 1394 case USB_DT_DEVICE: 1395 value = min (wLength, (u16) sizeof device_desc); 1396 memcpy (req->buf, &device_desc, value); 1397 break; 1398#ifdef CONFIG_USB_GADGET_DUALSPEED 1399 case USB_DT_DEVICE_QUALIFIER: 1400 if (!gadget->is_dualspeed) 1401 break; 1402 value = min (wLength, (u16) sizeof dev_qualifier); 1403 memcpy (req->buf, &dev_qualifier, value); 1404 break; 1405 1406 case USB_DT_OTHER_SPEED_CONFIG: 1407 if (!gadget->is_dualspeed) 1408 break; 1409 // FALLTHROUGH 1410#endif /* CONFIG_USB_GADGET_DUALSPEED */ 1411 case USB_DT_CONFIG: 1412 value = config_buf (gadget->speed, req->buf, 1413 wValue >> 8, 1414 wValue & 0xff, 1415 gadget->is_otg); 1416 if (value >= 0) 1417 value = min (wLength, (u16) value); 1418 break; 1419 1420 case USB_DT_STRING: 1421 value = usb_gadget_get_string (&stringtab, 1422 wValue & 0xff, req->buf); 1423 if (value >= 0) 1424 value = min (wLength, (u16) value); 1425 break; 1426 } 1427 break; 1428 1429 case USB_REQ_SET_CONFIGURATION: 1430 if (ctrl->bRequestType != 0) 1431 break; 1432 if (gadget->a_hnp_support) 1433 DEBUG (dev, "HNP available\n"); 1434 else if (gadget->a_alt_hnp_support) 1435 DEBUG (dev, "HNP needs a different root port\n"); 1436 spin_lock (&dev->lock); 1437 value = eth_set_config (dev, wValue, GFP_ATOMIC); 1438 spin_unlock (&dev->lock); 1439 break; 1440 case USB_REQ_GET_CONFIGURATION: 1441 if (ctrl->bRequestType != USB_DIR_IN) 1442 break; 1443 *(u8 *)req->buf = dev->config; 1444 value = min (wLength, (u16) 1); 1445 break; 1446 1447 case USB_REQ_SET_INTERFACE: 1448 if (ctrl->bRequestType != USB_RECIP_INTERFACE 1449 || !dev->config 1450 || wIndex > 1) 1451 break; 1452 if (!cdc_active(dev) && wIndex != 0) 1453 break; 1454 spin_lock (&dev->lock); 1455 1456 /* PXA hardware partially handles SET_INTERFACE; 1457 * we need to kluge around that interference. 1458 */ 1459 if (gadget_is_pxa (gadget)) { 1460 value = eth_set_config (dev, DEV_CONFIG_VALUE, 1461 GFP_ATOMIC); 1462 goto done_set_intf; 1463 } 1464 1465#ifdef DEV_CONFIG_CDC 1466 switch (wIndex) { 1467 case 0: /* control/master intf */ 1468 if (wValue != 0) 1469 break; 1470 if (dev->status) { 1471 usb_ep_disable (dev->status_ep); 1472 usb_ep_enable (dev->status_ep, dev->status); 1473 } 1474 value = 0; 1475 break; 1476 case 1: /* data intf */ 1477 if (wValue > 1) 1478 break; 1479 usb_ep_disable (dev->in_ep); 1480 usb_ep_disable (dev->out_ep); 1481 1482 /* CDC requires the data transfers not be done from 1483 * the default interface setting ... also, setting 1484 * the non-default interface resets filters etc. 1485 */ 1486 if (wValue == 1) { 1487 if (!cdc_active (dev)) 1488 break; 1489 usb_ep_enable (dev->in_ep, dev->in); 1490 usb_ep_enable (dev->out_ep, dev->out); 1491 dev->cdc_filter = DEFAULT_FILTER; 1492 netif_carrier_on (dev->net); 1493 if (dev->status) 1494 issue_start_status (dev); 1495 if (netif_running (dev->net)) { 1496 spin_unlock (&dev->lock); 1497 eth_start (dev, GFP_ATOMIC); 1498 spin_lock (&dev->lock); 1499 } 1500 } else { 1501 netif_stop_queue (dev->net); 1502 netif_carrier_off (dev->net); 1503 } 1504 value = 0; 1505 break; 1506 } 1507#else 1508 /* FIXME this is wrong, as is the assumption that 1509 * all non-PXA hardware talks real CDC ... 1510 */ 1511 dev_warn (&gadget->dev, "set_interface ignored!\n"); 1512#endif /* DEV_CONFIG_CDC */ 1513 1514done_set_intf: 1515 spin_unlock (&dev->lock); 1516 break; 1517 case USB_REQ_GET_INTERFACE: 1518 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) 1519 || !dev->config 1520 || wIndex > 1) 1521 break; 1522 if (!(cdc_active(dev) || rndis_active(dev)) && wIndex != 0) 1523 break; 1524 1525 /* for CDC, iff carrier is on, data interface is active. */ 1526 if (rndis_active(dev) || wIndex != 1) 1527 *(u8 *)req->buf = 0; 1528 else 1529 *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; 1530 value = min (wLength, (u16) 1); 1531 break; 1532 1533#ifdef DEV_CONFIG_CDC 1534 case USB_CDC_SET_ETHERNET_PACKET_FILTER: 1535 /* see 6.2.30: no data, wIndex = interface, 1536 * wValue = packet filter bitmap 1537 */ 1538 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) 1539 || !cdc_active(dev) 1540 || wLength != 0 1541 || wIndex > 1) 1542 break; 1543 DEBUG (dev, "packet filter %02x\n", wValue); 1544 dev->cdc_filter = wValue; 1545 value = 0; 1546 break; 1547 1548 /* and potentially: 1549 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS: 1550 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER: 1551 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER: 1552 * case USB_CDC_GET_ETHERNET_STATISTIC: 1553 */ 1554 1555#endif /* DEV_CONFIG_CDC */ 1556 1557#ifdef CONFIG_USB_ETH_RNDIS 1558 /* RNDIS uses the CDC command encapsulation mechanism to implement 1559 * an RPC scheme, with much getting/setting of attributes by OID. 1560 */ 1561 case USB_CDC_SEND_ENCAPSULATED_COMMAND: 1562 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) 1563 || !rndis_active(dev) 1564 || wLength > USB_BUFSIZ 1565 || wValue 1566 || rndis_control_intf.bInterfaceNumber 1567 != wIndex) 1568 break; 1569 /* read the request, then process it */ 1570 value = wLength; 1571 req->complete = rndis_command_complete; 1572 /* later, rndis_control_ack () sends a notification */ 1573 break; 1574 1575 case USB_CDC_GET_ENCAPSULATED_RESPONSE: 1576 if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE) 1577 == ctrl->bRequestType 1578 && rndis_active(dev) 1579 // && wLength >= 0x0400 1580 && !wValue 1581 && rndis_control_intf.bInterfaceNumber 1582 == wIndex) { 1583 u8 *buf; 1584 1585 /* return the result */ 1586 buf = rndis_get_next_response (dev->rndis_config, 1587 &value); 1588 if (buf) { 1589 memcpy (req->buf, buf, value); 1590 req->complete = rndis_response_complete; 1591 rndis_free_response(dev->rndis_config, buf); 1592 } 1593 /* else stalls ... spec says to avoid that */ 1594 } 1595 break; 1596#endif /* RNDIS */ 1597 1598 default: 1599 VDEBUG (dev, 1600 "unknown control req%02x.%02x v%04x i%04x l%d\n", 1601 ctrl->bRequestType, ctrl->bRequest, 1602 wValue, wIndex, wLength); 1603 } 1604 1605 /* respond with data transfer before status phase? */ 1606 if (value >= 0) { 1607 req->length = value; 1608 req->zero = value < wLength 1609 && (value % gadget->ep0->maxpacket) == 0; 1610 value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC); 1611 if (value < 0) { 1612 DEBUG (dev, "ep_queue --> %d\n", value); 1613 req->status = 0; 1614 eth_setup_complete (gadget->ep0, req); 1615 } 1616 } 1617 1618 /* host either stalls (value < 0) or reports success */ 1619 return value; 1620} 1621 1622static void 1623eth_disconnect (struct usb_gadget *gadget) 1624{ 1625 struct eth_dev *dev = get_gadget_data (gadget); 1626 unsigned long flags; 1627 1628 spin_lock_irqsave (&dev->lock, flags); 1629 netif_stop_queue (dev->net); 1630 netif_carrier_off (dev->net); 1631 eth_reset_config (dev); 1632 spin_unlock_irqrestore (&dev->lock, flags); 1633 1634 /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */ 1635 1636 /* next we may get setup() calls to enumerate new connections; 1637 * or an unbind() during shutdown (including removing module). 1638 */ 1639} 1640 1641/*-------------------------------------------------------------------------*/ 1642 1643/* NETWORK DRIVER HOOKUP (to the layer above this driver) */ 1644 1645static int eth_change_mtu (struct net_device *net, int new_mtu) 1646{ 1647 struct eth_dev *dev = netdev_priv(net); 1648 1649 if (dev->rndis) 1650 return -EBUSY; 1651 1652 if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN) 1653 return -ERANGE; 1654 /* no zero-length packet read wanted after mtu-sized packets */ 1655 if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0) 1656 return -EDOM; 1657 net->mtu = new_mtu; 1658 return 0; 1659} 1660 1661static struct net_device_stats *eth_get_stats (struct net_device *net) 1662{ 1663 return &((struct eth_dev *)netdev_priv(net))->stats; 1664} 1665 1666static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p) 1667{ 1668 struct eth_dev *dev = netdev_priv(net); 1669 strlcpy(p->driver, shortname, sizeof p->driver); 1670 strlcpy(p->version, DRIVER_VERSION, sizeof p->version); 1671 strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version); 1672 strlcpy (p->bus_info, dev->gadget->dev.bus_id, sizeof p->bus_info); 1673} 1674 1675static u32 eth_get_link(struct net_device *net) 1676{ 1677 struct eth_dev *dev = netdev_priv(net); 1678 return dev->gadget->speed != USB_SPEED_UNKNOWN; 1679} 1680 1681static struct ethtool_ops ops = { 1682 .get_drvinfo = eth_get_drvinfo, 1683 .get_link = eth_get_link 1684}; 1685 1686static void defer_kevent (struct eth_dev *dev, int flag) 1687{ 1688 if (test_and_set_bit (flag, &dev->todo)) 1689 return; 1690 if (!schedule_work (&dev->work)) 1691 ERROR (dev, "kevent %d may have been dropped\n", flag); 1692 else 1693 DEBUG (dev, "kevent %d scheduled\n", flag); 1694} 1695 1696static void rx_complete (struct usb_ep *ep, struct usb_request *req); 1697 1698static int 1699rx_submit (struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags) 1700{ 1701 struct sk_buff *skb; 1702 int retval = -ENOMEM; 1703 size_t size; 1704 1705 /* Padding up to RX_EXTRA handles minor disagreements with host. 1706 * Normally we use the USB "terminate on short read" convention; 1707 * so allow up to (N*maxpacket), since that memory is normally 1708 * already allocated. Some hardware doesn't deal well with short 1709 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a 1710 * byte off the end (to force hardware errors on overflow). 1711 * 1712 * RNDIS uses internal framing, and explicitly allows senders to 1713 * pad to end-of-packet. That's potentially nice for speed, 1714 * but means receivers can't recover synch on their own. 1715 */ 1716 size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA); 1717 size += dev->out_ep->maxpacket - 1; 1718 if (rndis_active(dev)) 1719 size += sizeof (struct rndis_packet_msg_type); 1720 size -= size % dev->out_ep->maxpacket; 1721 1722 if ((skb = alloc_skb (size + NET_IP_ALIGN, gfp_flags)) == 0) { 1723 DEBUG (dev, "no rx skb\n"); 1724 goto enomem; 1725 } 1726 1727 /* Some platforms perform better when IP packets are aligned, 1728 * but on at least one, checksumming fails otherwise. Note: 1729 * RNDIS headers involve variable numbers of LE32 values. 1730 */ 1731 skb_reserve(skb, NET_IP_ALIGN); 1732 1733 req->buf = skb->data; 1734 req->length = size; 1735 req->complete = rx_complete; 1736 req->context = skb; 1737 1738 retval = usb_ep_queue (dev->out_ep, req, gfp_flags); 1739 if (retval == -ENOMEM) 1740enomem: 1741 defer_kevent (dev, WORK_RX_MEMORY); 1742 if (retval) { 1743 DEBUG (dev, "rx submit --> %d\n", retval); 1744 if (skb) 1745 dev_kfree_skb_any(skb); 1746 spin_lock(&dev->req_lock); 1747 list_add (&req->list, &dev->rx_reqs); 1748 spin_unlock(&dev->req_lock); 1749 } 1750 return retval; 1751} 1752 1753static void rx_complete (struct usb_ep *ep, struct usb_request *req) 1754{ 1755 struct sk_buff *skb = req->context; 1756 struct eth_dev *dev = ep->driver_data; 1757 int status = req->status; 1758 1759 switch (status) { 1760 1761 /* normal completion */ 1762 case 0: 1763 skb_put (skb, req->actual); 1764 /* we know MaxPacketsPerTransfer == 1 here */ 1765 if (rndis_active(dev)) 1766 status = rndis_rm_hdr (skb); 1767 if (status < 0 1768 || ETH_HLEN > skb->len 1769 || skb->len > ETH_FRAME_LEN) { 1770 dev->stats.rx_errors++; 1771 dev->stats.rx_length_errors++; 1772 DEBUG (dev, "rx length %d\n", skb->len); 1773 break; 1774 } 1775 1776 skb->protocol = eth_type_trans (skb, dev->net); 1777 dev->stats.rx_packets++; 1778 dev->stats.rx_bytes += skb->len; 1779 1780 /* no buffer copies needed, unless hardware can't 1781 * use skb buffers. 1782 */ 1783 status = netif_rx (skb); 1784 skb = NULL; 1785 break; 1786 1787 /* software-driven interface shutdown */ 1788 case -ECONNRESET: // unlink 1789 case -ESHUTDOWN: // disconnect etc 1790 VDEBUG (dev, "rx shutdown, code %d\n", status); 1791 goto quiesce; 1792 1793 /* for hardware automagic (such as pxa) */ 1794 case -ECONNABORTED: // endpoint reset 1795 DEBUG (dev, "rx %s reset\n", ep->name); 1796 defer_kevent (dev, WORK_RX_MEMORY); 1797quiesce: 1798 dev_kfree_skb_any (skb); 1799 goto clean; 1800 1801 /* data overrun */ 1802 case -EOVERFLOW: 1803 dev->stats.rx_over_errors++; 1804 // FALLTHROUGH 1805 1806 default: 1807 dev->stats.rx_errors++; 1808 DEBUG (dev, "rx status %d\n", status); 1809 break; 1810 } 1811 1812 if (skb) 1813 dev_kfree_skb_any (skb); 1814 if (!netif_running (dev->net)) { 1815clean: 1816 spin_lock(&dev->req_lock); 1817 list_add (&req->list, &dev->rx_reqs); 1818 spin_unlock(&dev->req_lock); 1819 req = NULL; 1820 } 1821 if (req) 1822 rx_submit (dev, req, GFP_ATOMIC); 1823} 1824 1825static int prealloc (struct list_head *list, struct usb_ep *ep, 1826 unsigned n, gfp_t gfp_flags) 1827{ 1828 unsigned i; 1829 struct usb_request *req; 1830 1831 if (!n) 1832 return -ENOMEM; 1833 1834 /* queue/recycle up to N requests */ 1835 i = n; 1836 list_for_each_entry (req, list, list) { 1837 if (i-- == 0) 1838 goto extra; 1839 } 1840 while (i--) { 1841 req = usb_ep_alloc_request (ep, gfp_flags); 1842 if (!req) 1843 return list_empty (list) ? -ENOMEM : 0; 1844 list_add (&req->list, list); 1845 } 1846 return 0; 1847 1848extra: 1849 /* free extras */ 1850 for (;;) { 1851 struct list_head *next; 1852 1853 next = req->list.next; 1854 list_del (&req->list); 1855 usb_ep_free_request (ep, req); 1856 1857 if (next == list) 1858 break; 1859 1860 req = container_of (next, struct usb_request, list); 1861 } 1862 return 0; 1863} 1864 1865static int alloc_requests (struct eth_dev *dev, unsigned n, gfp_t gfp_flags) 1866{ 1867 int status; 1868 1869 spin_lock(&dev->req_lock); 1870 status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags); 1871 if (status < 0) 1872 goto fail; 1873 status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags); 1874 if (status < 0) 1875 goto fail; 1876 goto done; 1877fail: 1878 DEBUG (dev, "can't alloc requests\n"); 1879done: 1880 spin_unlock(&dev->req_lock); 1881 return status; 1882} 1883 1884static void rx_fill (struct eth_dev *dev, gfp_t gfp_flags) 1885{ 1886 struct usb_request *req; 1887 unsigned long flags; 1888 1889 /* fill unused rxq slots with some skb */ 1890 spin_lock_irqsave(&dev->req_lock, flags); 1891 while (!list_empty (&dev->rx_reqs)) { 1892 req = container_of (dev->rx_reqs.next, 1893 struct usb_request, list); 1894 list_del_init (&req->list); 1895 spin_unlock_irqrestore(&dev->req_lock, flags); 1896 1897 if (rx_submit (dev, req, gfp_flags) < 0) { 1898 defer_kevent (dev, WORK_RX_MEMORY); 1899 return; 1900 } 1901 1902 spin_lock_irqsave(&dev->req_lock, flags); 1903 } 1904 spin_unlock_irqrestore(&dev->req_lock, flags); 1905} 1906 1907static void eth_work (struct work_struct *work) 1908{ 1909 struct eth_dev *dev = container_of(work, struct eth_dev, work); 1910 1911 if (test_and_clear_bit (WORK_RX_MEMORY, &dev->todo)) { 1912 if (netif_running (dev->net)) 1913 rx_fill (dev, GFP_KERNEL); 1914 } 1915 1916 if (dev->todo) 1917 DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo); 1918} 1919 1920static void tx_complete (struct usb_ep *ep, struct usb_request *req) 1921{ 1922 struct sk_buff *skb = req->context; 1923 struct eth_dev *dev = ep->driver_data; 1924 1925 switch (req->status) { 1926 default: 1927 dev->stats.tx_errors++; 1928 VDEBUG (dev, "tx err %d\n", req->status); 1929 /* FALLTHROUGH */ 1930 case -ECONNRESET: // unlink 1931 case -ESHUTDOWN: // disconnect etc 1932 break; 1933 case 0: 1934 dev->stats.tx_bytes += skb->len; 1935 } 1936 dev->stats.tx_packets++; 1937 1938 spin_lock(&dev->req_lock); 1939 list_add (&req->list, &dev->tx_reqs); 1940 spin_unlock(&dev->req_lock); 1941 dev_kfree_skb_any (skb); 1942 1943 atomic_dec (&dev->tx_qlen); 1944 if (netif_carrier_ok (dev->net)) 1945 netif_wake_queue (dev->net); 1946} 1947 1948static inline int eth_is_promisc (struct eth_dev *dev) 1949{ 1950 /* no filters for the CDC subset; always promisc */ 1951 if (subset_active (dev)) 1952 return 1; 1953 return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS; 1954} 1955 1956static int eth_start_xmit (struct sk_buff *skb, struct net_device *net) 1957{ 1958 struct eth_dev *dev = netdev_priv(net); 1959 int length = skb->len; 1960 int retval; 1961 struct usb_request *req = NULL; 1962 unsigned long flags; 1963 1964 /* apply outgoing CDC or RNDIS filters */ 1965 if (!eth_is_promisc (dev)) { 1966 u8 *dest = skb->data; 1967 1968 if (is_multicast_ether_addr(dest)) { 1969 u16 type; 1970 1971 /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host 1972 * SET_ETHERNET_MULTICAST_FILTERS requests 1973 */ 1974 if (is_broadcast_ether_addr(dest)) 1975 type = USB_CDC_PACKET_TYPE_BROADCAST; 1976 else 1977 type = USB_CDC_PACKET_TYPE_ALL_MULTICAST; 1978 if (!(dev->cdc_filter & type)) { 1979 dev_kfree_skb_any (skb); 1980 return 0; 1981 } 1982 } 1983 /* ignores USB_CDC_PACKET_TYPE_DIRECTED */ 1984 } 1985 1986 spin_lock_irqsave(&dev->req_lock, flags); 1987 req = container_of (dev->tx_reqs.next, struct usb_request, list); 1988 list_del (&req->list); 1989 if (list_empty (&dev->tx_reqs)) 1990 netif_stop_queue (net); 1991 spin_unlock_irqrestore(&dev->req_lock, flags); 1992 1993 /* no buffer copies needed, unless the network stack did it 1994 * or the hardware can't use skb buffers. 1995 * or there's not enough space for any RNDIS headers we need 1996 */ 1997 if (rndis_active(dev)) { 1998 struct sk_buff *skb_rndis; 1999 2000 skb_rndis = skb_realloc_headroom (skb, 2001 sizeof (struct rndis_packet_msg_type)); 2002 if (!skb_rndis) 2003 goto drop; 2004 2005 dev_kfree_skb_any (skb); 2006 skb = skb_rndis; 2007 rndis_add_hdr (skb); 2008 length = skb->len; 2009 } 2010 req->buf = skb->data; 2011 req->context = skb; 2012 req->complete = tx_complete; 2013 2014 /* use zlp framing on tx for strict CDC-Ether conformance, 2015 * though any robust network rx path ignores extra padding. 2016 * and some hardware doesn't like to write zlps. 2017 */ 2018 req->zero = 1; 2019 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0) 2020 length++; 2021 2022 req->length = length; 2023 2024#ifdef CONFIG_USB_GADGET_DUALSPEED 2025 /* throttle highspeed IRQ rate back slightly */ 2026 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH) 2027 ? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0) 2028 : 0; 2029#endif 2030 2031 retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC); 2032 switch (retval) { 2033 default: 2034 DEBUG (dev, "tx queue err %d\n", retval); 2035 break; 2036 case 0: 2037 net->trans_start = jiffies; 2038 atomic_inc (&dev->tx_qlen); 2039 } 2040 2041 if (retval) { 2042drop: 2043 dev->stats.tx_dropped++; 2044 dev_kfree_skb_any (skb); 2045 spin_lock_irqsave(&dev->req_lock, flags); 2046 if (list_empty (&dev->tx_reqs)) 2047 netif_start_queue (net); 2048 list_add (&req->list, &dev->tx_reqs); 2049 spin_unlock_irqrestore(&dev->req_lock, flags); 2050 } 2051 return 0; 2052} 2053 2054/*-------------------------------------------------------------------------*/ 2055 2056#ifdef CONFIG_USB_ETH_RNDIS 2057 2058/* The interrupt endpoint is used in RNDIS to notify the host when messages 2059 * other than data packets are available ... notably the REMOTE_NDIS_*_CMPLT 2060 * messages, but also REMOTE_NDIS_INDICATE_STATUS_MSG and potentially even 2061 * REMOTE_NDIS_KEEPALIVE_MSG. 2062 * 2063 * The RNDIS control queue is processed by GET_ENCAPSULATED_RESPONSE, and 2064 * normally just one notification will be queued. 2065 */ 2066 2067static struct usb_request *eth_req_alloc (struct usb_ep *, unsigned, gfp_t); 2068static void eth_req_free (struct usb_ep *ep, struct usb_request *req); 2069 2070static void 2071rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req) 2072{ 2073 struct eth_dev *dev = ep->driver_data; 2074 2075 if (req->status || req->actual != req->length) 2076 DEBUG (dev, 2077 "rndis control ack complete --> %d, %d/%d\n", 2078 req->status, req->actual, req->length); 2079 req->context = NULL; 2080 2081 if (req != dev->stat_req) 2082 eth_req_free(ep, req); 2083} 2084 2085static int rndis_control_ack (struct net_device *net) 2086{ 2087 struct eth_dev *dev = netdev_priv(net); 2088 int length; 2089 struct usb_request *resp = dev->stat_req; 2090 2091 /* in case RNDIS calls this after disconnect */ 2092 if (!dev->status) { 2093 DEBUG (dev, "status ENODEV\n"); 2094 return -ENODEV; 2095 } 2096 2097 /* in case queue length > 1 */ 2098 if (resp->context) { 2099 resp = eth_req_alloc (dev->status_ep, 8, GFP_ATOMIC); 2100 if (!resp) 2101 return -ENOMEM; 2102 } 2103 2104 /* Send RNDIS RESPONSE_AVAILABLE notification; 2105 * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too 2106 */ 2107 resp->length = 8; 2108 resp->complete = rndis_control_ack_complete; 2109 resp->context = dev; 2110 2111 *((__le32 *) resp->buf) = __constant_cpu_to_le32 (1); 2112 *((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0); 2113 2114 length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC); 2115 if (length < 0) { 2116 resp->status = 0; 2117 rndis_control_ack_complete (dev->status_ep, resp); 2118 } 2119 2120 return 0; 2121} 2122 2123#else 2124 2125#define rndis_control_ack NULL 2126 2127#endif /* RNDIS */ 2128 2129static void eth_start (struct eth_dev *dev, gfp_t gfp_flags) 2130{ 2131 DEBUG (dev, "%s\n", __FUNCTION__); 2132 2133 /* fill the rx queue */ 2134 rx_fill (dev, gfp_flags); 2135 2136 /* and open the tx floodgates */ 2137 atomic_set (&dev->tx_qlen, 0); 2138 netif_wake_queue (dev->net); 2139 if (rndis_active(dev)) { 2140 rndis_set_param_medium (dev->rndis_config, 2141 NDIS_MEDIUM_802_3, 2142 BITRATE(dev->gadget)/100); 2143 (void) rndis_signal_connect (dev->rndis_config); 2144 } 2145} 2146 2147static int eth_open (struct net_device *net) 2148{ 2149 struct eth_dev *dev = netdev_priv(net); 2150 2151 DEBUG (dev, "%s\n", __FUNCTION__); 2152 if (netif_carrier_ok (dev->net)) 2153 eth_start (dev, GFP_KERNEL); 2154 return 0; 2155} 2156 2157static int eth_stop (struct net_device *net) 2158{ 2159 struct eth_dev *dev = netdev_priv(net); 2160 2161 VDEBUG (dev, "%s\n", __FUNCTION__); 2162 netif_stop_queue (net); 2163 2164 DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n", 2165 dev->stats.rx_packets, dev->stats.tx_packets, 2166 dev->stats.rx_errors, dev->stats.tx_errors 2167 ); 2168 2169 /* ensure there are no more active requests */ 2170 if (dev->config) { 2171 usb_ep_disable (dev->in_ep); 2172 usb_ep_disable (dev->out_ep); 2173 if (netif_carrier_ok (dev->net)) { 2174 DEBUG (dev, "host still using in/out endpoints\n"); 2175 // FIXME idiom may leave toggle wrong here 2176 usb_ep_enable (dev->in_ep, dev->in); 2177 usb_ep_enable (dev->out_ep, dev->out); 2178 } 2179 if (dev->status_ep) { 2180 usb_ep_disable (dev->status_ep); 2181 usb_ep_enable (dev->status_ep, dev->status); 2182 } 2183 } 2184 2185 if (rndis_active(dev)) { 2186 rndis_set_param_medium (dev->rndis_config, 2187 NDIS_MEDIUM_802_3, 0); 2188 (void) rndis_signal_disconnect (dev->rndis_config); 2189 } 2190 2191 return 0; 2192} 2193 2194/*-------------------------------------------------------------------------*/ 2195 2196static struct usb_request * 2197eth_req_alloc (struct usb_ep *ep, unsigned size, gfp_t gfp_flags) 2198{ 2199 struct usb_request *req; 2200 2201 req = usb_ep_alloc_request (ep, gfp_flags); 2202 if (!req) 2203 return NULL; 2204 2205 req->buf = kmalloc (size, gfp_flags); 2206 if (!req->buf) { 2207 usb_ep_free_request (ep, req); 2208 req = NULL; 2209 } 2210 return req; 2211} 2212 2213static void 2214eth_req_free (struct usb_ep *ep, struct usb_request *req) 2215{ 2216 kfree (req->buf); 2217 usb_ep_free_request (ep, req); 2218} 2219 2220 2221static void /* __init_or_exit */ 2222eth_unbind (struct usb_gadget *gadget) 2223{ 2224 struct eth_dev *dev = get_gadget_data (gadget); 2225 2226 DEBUG (dev, "unbind\n"); 2227 rndis_deregister (dev->rndis_config); 2228 rndis_exit (); 2229 2230 /* we've already been disconnected ... no i/o is active */ 2231 if (dev->req) { 2232 eth_req_free (gadget->ep0, dev->req); 2233 dev->req = NULL; 2234 } 2235 if (dev->stat_req) { 2236 eth_req_free (dev->status_ep, dev->stat_req); 2237 dev->stat_req = NULL; 2238 } 2239 2240 unregister_netdev (dev->net); 2241 free_netdev(dev->net); 2242 2243 /* assuming we used keventd, it must quiesce too */ 2244 flush_scheduled_work (); 2245 set_gadget_data (gadget, NULL); 2246} 2247 2248static u8 __devinit nibble (unsigned char c) 2249{ 2250 if (likely (isdigit (c))) 2251 return c - '0'; 2252 c = toupper (c); 2253 if (likely (isxdigit (c))) 2254 return 10 + c - 'A'; 2255 return 0; 2256} 2257 2258static int __devinit get_ether_addr(const char *str, u8 *dev_addr) 2259{ 2260 if (str) { 2261 unsigned i; 2262 2263 for (i = 0; i < 6; i++) { 2264 unsigned char num; 2265 2266 if((*str == '.') || (*str == ':')) 2267 str++; 2268 num = nibble(*str++) << 4; 2269 num |= (nibble(*str++)); 2270 dev_addr [i] = num; 2271 } 2272 if (is_valid_ether_addr (dev_addr)) 2273 return 0; 2274 } 2275 random_ether_addr(dev_addr); 2276 return 1; 2277} 2278 2279static int __devinit 2280eth_bind (struct usb_gadget *gadget) 2281{ 2282 struct eth_dev *dev; 2283 struct net_device *net; 2284 u8 cdc = 1, zlp = 1, rndis = 1; 2285 struct usb_ep *in_ep, *out_ep, *status_ep = NULL; 2286 int status = -ENOMEM; 2287 int gcnum; 2288 2289 /* these flags are only ever cleared; compiler take note */ 2290#ifndef DEV_CONFIG_CDC 2291 cdc = 0; 2292#endif 2293#ifndef CONFIG_USB_ETH_RNDIS 2294 rndis = 0; 2295#endif 2296 2297 /* Because most host side USB stacks handle CDC Ethernet, that 2298 * standard protocol is _strongly_ preferred for interop purposes. 2299 * (By everyone except Microsoft.) 2300 */ 2301 if (gadget_is_pxa (gadget)) { 2302 /* pxa doesn't support altsettings */ 2303 cdc = 0; 2304 } else if (gadget_is_musbhdrc(gadget)) { 2305 /* reduce tx dma overhead by avoiding special cases */ 2306 zlp = 0; 2307 } else if (gadget_is_sh(gadget)) { 2308 /* sh doesn't support multiple interfaces or configs */ 2309 cdc = 0; 2310 rndis = 0; 2311 } else if (gadget_is_sa1100 (gadget)) { 2312 /* hardware can't write zlps */ 2313 zlp = 0; 2314 /* sa1100 CAN do CDC, without status endpoint ... we use 2315 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth". 2316 */ 2317 cdc = 0; 2318 } 2319 2320 gcnum = usb_gadget_controller_number (gadget); 2321 if (gcnum >= 0) 2322 device_desc.bcdDevice = cpu_to_le16 (0x0200 + gcnum); 2323 else { 2324 /* can't assume CDC works. don't want to default to 2325 * anything less functional on CDC-capable hardware, 2326 * so we fail in this case. 2327 */ 2328 dev_err (&gadget->dev, 2329 "controller '%s' not recognized\n", 2330 gadget->name); 2331 return -ENODEV; 2332 } 2333 snprintf (manufacturer, sizeof manufacturer, "%s %s/%s", 2334 init_utsname()->sysname, init_utsname()->release, 2335 gadget->name); 2336 2337 /* If there's an RNDIS configuration, that's what Windows wants to 2338 * be using ... so use these product IDs here and in the "linux.inf" 2339 * needed to install MSFT drivers. Current Linux kernels will use 2340 * the second configuration if it's CDC Ethernet, and need some help 2341 * to choose the right configuration otherwise. 2342 */ 2343 if (rndis) { 2344 device_desc.idVendor = 2345 __constant_cpu_to_le16(RNDIS_VENDOR_NUM); 2346 device_desc.idProduct = 2347 __constant_cpu_to_le16(RNDIS_PRODUCT_NUM); 2348 snprintf (product_desc, sizeof product_desc, 2349 "RNDIS/%s", driver_desc); 2350 2351 /* CDC subset ... recognized by Linux since 2.4.10, but Windows 2352 * drivers aren't widely available. (That may be improved by 2353 * supporting one submode of the "SAFE" variant of MDLM.) 2354 */ 2355 } else if (!cdc) { 2356 device_desc.idVendor = 2357 __constant_cpu_to_le16(SIMPLE_VENDOR_NUM); 2358 device_desc.idProduct = 2359 __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM); 2360 } 2361 2362 /* support optional vendor/distro customization */ 2363 if (idVendor) { 2364 if (!idProduct) { 2365 dev_err (&gadget->dev, "idVendor needs idProduct!\n"); 2366 return -ENODEV; 2367 } 2368 device_desc.idVendor = cpu_to_le16(idVendor); 2369 device_desc.idProduct = cpu_to_le16(idProduct); 2370 if (bcdDevice) 2371 device_desc.bcdDevice = cpu_to_le16(bcdDevice); 2372 } 2373 if (iManufacturer) 2374 strlcpy (manufacturer, iManufacturer, sizeof manufacturer); 2375 if (iProduct) 2376 strlcpy (product_desc, iProduct, sizeof product_desc); 2377 if (iSerialNumber) { 2378 device_desc.iSerialNumber = STRING_SERIALNUMBER, 2379 strlcpy(serial_number, iSerialNumber, sizeof serial_number); 2380 } 2381 2382 /* all we really need is bulk IN/OUT */ 2383 usb_ep_autoconfig_reset (gadget); 2384 in_ep = usb_ep_autoconfig (gadget, &fs_source_desc); 2385 if (!in_ep) { 2386autoconf_fail: 2387 dev_err (&gadget->dev, 2388 "can't autoconfigure on %s\n", 2389 gadget->name); 2390 return -ENODEV; 2391 } 2392 in_ep->driver_data = in_ep; /* claim */ 2393 2394 out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc); 2395 if (!out_ep) 2396 goto autoconf_fail; 2397 out_ep->driver_data = out_ep; /* claim */ 2398 2399#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 2400 /* CDC Ethernet control interface doesn't require a status endpoint. 2401 * Since some hosts expect one, try to allocate one anyway. 2402 */ 2403 if (cdc || rndis) { 2404 status_ep = usb_ep_autoconfig (gadget, &fs_status_desc); 2405 if (status_ep) { 2406 status_ep->driver_data = status_ep; /* claim */ 2407 } else if (rndis) { 2408 dev_err (&gadget->dev, 2409 "can't run RNDIS on %s\n", 2410 gadget->name); 2411 return -ENODEV; 2412#ifdef DEV_CONFIG_CDC 2413 /* pxa25x only does CDC subset; often used with RNDIS */ 2414 } else if (cdc) { 2415 control_intf.bNumEndpoints = 0; 2416 /* FIXME remove endpoint from descriptor list */ 2417#endif 2418 } 2419 } 2420#endif 2421 2422 /* one config: cdc, else minimal subset */ 2423 if (!cdc) { 2424 eth_config.bNumInterfaces = 1; 2425 eth_config.iConfiguration = STRING_SUBSET; 2426 2427 /* use functions to set these up, in case we're built to work 2428 * with multiple controllers and must override CDC Ethernet. 2429 */ 2430 fs_subset_descriptors(); 2431 hs_subset_descriptors(); 2432 } 2433 2434 device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; 2435 usb_gadget_set_selfpowered (gadget); 2436 2437 /* For now RNDIS is always a second config */ 2438 if (rndis) 2439 device_desc.bNumConfigurations = 2; 2440 2441#ifdef CONFIG_USB_GADGET_DUALSPEED 2442 if (rndis) 2443 dev_qualifier.bNumConfigurations = 2; 2444 else if (!cdc) 2445 dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC; 2446 2447 /* assumes ep0 uses the same value for both speeds ... */ 2448 dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0; 2449 2450 /* and that all endpoints are dual-speed */ 2451 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress; 2452 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress; 2453#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 2454 if (status_ep) 2455 hs_status_desc.bEndpointAddress = 2456 fs_status_desc.bEndpointAddress; 2457#endif 2458#endif /* DUALSPEED */ 2459 2460 if (gadget->is_otg) { 2461 otg_descriptor.bmAttributes |= USB_OTG_HNP, 2462 eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP; 2463 eth_config.bMaxPower = 4; 2464#ifdef CONFIG_USB_ETH_RNDIS 2465 rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP; 2466 rndis_config.bMaxPower = 4; 2467#endif 2468 } 2469 2470 net = alloc_etherdev (sizeof *dev); 2471 if (!net) 2472 return status; 2473 dev = netdev_priv(net); 2474 spin_lock_init (&dev->lock); 2475 spin_lock_init (&dev->req_lock); 2476 INIT_WORK (&dev->work, eth_work); 2477 INIT_LIST_HEAD (&dev->tx_reqs); 2478 INIT_LIST_HEAD (&dev->rx_reqs); 2479 2480 /* network device setup */ 2481 dev->net = net; 2482 SET_MODULE_OWNER (net); 2483 strcpy (net->name, "usb%d"); 2484 dev->cdc = cdc; 2485 dev->zlp = zlp; 2486 2487 dev->in_ep = in_ep; 2488 dev->out_ep = out_ep; 2489 dev->status_ep = status_ep; 2490 2491 /* Module params for these addresses should come from ID proms. 2492 * The host side address is used with CDC and RNDIS, and commonly 2493 * ends up in a persistent config database. It's not clear if 2494 * host side code for the SAFE thing cares -- its original BLAN 2495 * thing didn't, Sharp never assigned those addresses on Zaurii. 2496 */ 2497 if (get_ether_addr(dev_addr, net->dev_addr)) 2498 dev_warn(&gadget->dev, 2499 "using random %s ethernet address\n", "self"); 2500 if (get_ether_addr(host_addr, dev->host_mac)) 2501 dev_warn(&gadget->dev, 2502 "using random %s ethernet address\n", "host"); 2503 snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X", 2504 dev->host_mac [0], dev->host_mac [1], 2505 dev->host_mac [2], dev->host_mac [3], 2506 dev->host_mac [4], dev->host_mac [5]); 2507 2508 if (rndis) { 2509 status = rndis_init(); 2510 if (status < 0) { 2511 dev_err (&gadget->dev, "can't init RNDIS, %d\n", 2512 status); 2513 goto fail; 2514 } 2515 } 2516 2517 net->change_mtu = eth_change_mtu; 2518 net->get_stats = eth_get_stats; 2519 net->hard_start_xmit = eth_start_xmit; 2520 net->open = eth_open; 2521 net->stop = eth_stop; 2522 // watchdog_timeo, tx_timeout ... 2523 // set_multicast_list 2524 SET_ETHTOOL_OPS(net, &ops); 2525 2526 /* preallocate control message data and buffer */ 2527 dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ, GFP_KERNEL); 2528 if (!dev->req) 2529 goto fail; 2530 dev->req->complete = eth_setup_complete; 2531 2532 /* ... and maybe likewise for status transfer */ 2533#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 2534 if (dev->status_ep) { 2535 dev->stat_req = eth_req_alloc (dev->status_ep, 2536 STATUS_BYTECOUNT, GFP_KERNEL); 2537 if (!dev->stat_req) { 2538 eth_req_free (gadget->ep0, dev->req); 2539 goto fail; 2540 } 2541 dev->stat_req->context = NULL; 2542 } 2543#endif 2544 2545 /* finish hookup to lower layer ... */ 2546 dev->gadget = gadget; 2547 set_gadget_data (gadget, dev); 2548 gadget->ep0->driver_data = dev; 2549 2550 /* two kinds of host-initiated state changes: 2551 * - iff DATA transfer is active, carrier is "on" 2552 * - tx queueing enabled if open *and* carrier is "on" 2553 */ 2554 netif_stop_queue (dev->net); 2555 netif_carrier_off (dev->net); 2556 2557 SET_NETDEV_DEV (dev->net, &gadget->dev); 2558 status = register_netdev (dev->net); 2559 if (status < 0) 2560 goto fail1; 2561 2562 INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc); 2563 INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name, 2564 out_ep->name, in_ep->name, 2565 status_ep ? " STATUS " : "", 2566 status_ep ? status_ep->name : "" 2567 ); 2568 INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n", 2569 net->dev_addr [0], net->dev_addr [1], 2570 net->dev_addr [2], net->dev_addr [3], 2571 net->dev_addr [4], net->dev_addr [5]); 2572 2573 if (cdc || rndis) 2574 INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n", 2575 dev->host_mac [0], dev->host_mac [1], 2576 dev->host_mac [2], dev->host_mac [3], 2577 dev->host_mac [4], dev->host_mac [5]); 2578 2579 if (rndis) { 2580 u32 vendorID = 0; 2581 2582 /* FIXME RNDIS vendor id == "vendor NIC code" == ? */ 2583 2584 dev->rndis_config = rndis_register (rndis_control_ack); 2585 if (dev->rndis_config < 0) { 2586fail0: 2587 unregister_netdev (dev->net); 2588 status = -ENODEV; 2589 goto fail; 2590 } 2591 2592 /* these set up a lot of the OIDs that RNDIS needs */ 2593 rndis_set_host_mac (dev->rndis_config, dev->host_mac); 2594 if (rndis_set_param_dev (dev->rndis_config, dev->net, 2595 &dev->stats, &dev->cdc_filter)) 2596 goto fail0; 2597 if (rndis_set_param_vendor (dev->rndis_config, vendorID, 2598 manufacturer)) 2599 goto fail0; 2600 if (rndis_set_param_medium (dev->rndis_config, 2601 NDIS_MEDIUM_802_3, 2602 0)) 2603 goto fail0; 2604 INFO (dev, "RNDIS ready\n"); 2605 } 2606 2607 return status; 2608 2609fail1: 2610 dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status); 2611fail: 2612 eth_unbind (gadget); 2613 return status; 2614} 2615 2616/*-------------------------------------------------------------------------*/ 2617 2618static void 2619eth_suspend (struct usb_gadget *gadget) 2620{ 2621 struct eth_dev *dev = get_gadget_data (gadget); 2622 2623 DEBUG (dev, "suspend\n"); 2624 dev->suspended = 1; 2625} 2626 2627static void 2628eth_resume (struct usb_gadget *gadget) 2629{ 2630 struct eth_dev *dev = get_gadget_data (gadget); 2631 2632 DEBUG (dev, "resume\n"); 2633 dev->suspended = 0; 2634} 2635 2636/*-------------------------------------------------------------------------*/ 2637 2638static struct usb_gadget_driver eth_driver = { 2639 .speed = DEVSPEED, 2640 2641 .function = (char *) driver_desc, 2642 .bind = eth_bind, 2643 .unbind = eth_unbind, 2644 2645 .setup = eth_setup, 2646 .disconnect = eth_disconnect, 2647 2648 .suspend = eth_suspend, 2649 .resume = eth_resume, 2650 2651 .driver = { 2652 .name = (char *) shortname, 2653 .owner = THIS_MODULE, 2654 }, 2655}; 2656 2657MODULE_DESCRIPTION (DRIVER_DESC); 2658MODULE_AUTHOR ("David Brownell, Benedikt Spanger"); 2659MODULE_LICENSE ("GPL"); 2660 2661 2662static int __init init (void) 2663{ 2664 return usb_gadget_register_driver (ð_driver); 2665} 2666module_init (init); 2667 2668static void __exit cleanup (void) 2669{ 2670 usb_gadget_unregister_driver (ð_driver); 2671} 2672module_exit (cleanup); 2673 2674