ether.c revision 093cf723b2b06d774929ea07982f6a466ff22314
1/* 2 * ether.c -- Ethernet gadget driver, with CDC and non-CDC options 3 * 4 * Copyright (C) 2003-2005 David Brownell 5 * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 23// #define DEBUG 1 24// #define VERBOSE 25 26#include <linux/config.h> 27#include <linux/module.h> 28#include <linux/kernel.h> 29#include <linux/delay.h> 30#include <linux/ioport.h> 31#include <linux/sched.h> 32#include <linux/slab.h> 33#include <linux/smp_lock.h> 34#include <linux/errno.h> 35#include <linux/init.h> 36#include <linux/timer.h> 37#include <linux/list.h> 38#include <linux/interrupt.h> 39#include <linux/utsname.h> 40#include <linux/device.h> 41#include <linux/moduleparam.h> 42#include <linux/ctype.h> 43 44#include <asm/byteorder.h> 45#include <asm/io.h> 46#include <asm/irq.h> 47#include <asm/system.h> 48#include <asm/uaccess.h> 49#include <asm/unaligned.h> 50 51#include <linux/usb_ch9.h> 52#include <linux/usb_cdc.h> 53#include <linux/usb_gadget.h> 54 55#include <linux/random.h> 56#include <linux/netdevice.h> 57#include <linux/etherdevice.h> 58#include <linux/ethtool.h> 59 60#include "gadget_chips.h" 61 62/*-------------------------------------------------------------------------*/ 63 64/* 65 * Ethernet gadget driver -- with CDC and non-CDC options 66 * Builds on hardware support for a full duplex link. 67 * 68 * CDC Ethernet is the standard USB solution for sending Ethernet frames 69 * using USB. Real hardware tends to use the same framing protocol but look 70 * different for control features. This driver strongly prefers to use 71 * this USB-IF standard as its open-systems interoperability solution; 72 * most host side USB stacks (except from Microsoft) support it. 73 * 74 * There's some hardware that can't talk CDC. We make that hardware 75 * implement a "minimalist" vendor-agnostic CDC core: same framing, but 76 * link-level setup only requires activating the configuration. 77 * Linux supports it, but other host operating systems may not. 78 * (This is a subset of CDC Ethernet.) 79 * 80 * A third option is also in use. Rather than CDC Ethernet, or something 81 * simpler, Microsoft pushes their own approach: RNDIS. The published 82 * RNDIS specs are ambiguous and appear to be incomplete, and are also 83 * needlessly complex. 84 */ 85 86#define DRIVER_DESC "Ethernet Gadget" 87#define DRIVER_VERSION "Equinox 2004" 88 89static const char shortname [] = "ether"; 90static const char driver_desc [] = DRIVER_DESC; 91 92#define RX_EXTRA 20 /* guard against rx overflows */ 93 94#ifdef CONFIG_USB_ETH_RNDIS 95#include "rndis.h" 96#else 97#define rndis_init() 0 98#define rndis_exit() do{}while(0) 99#endif 100 101/* CDC and RNDIS support the same host-chosen outgoing packet filters. */ 102#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \ 103 |USB_CDC_PACKET_TYPE_ALL_MULTICAST \ 104 |USB_CDC_PACKET_TYPE_PROMISCUOUS \ 105 |USB_CDC_PACKET_TYPE_DIRECTED) 106 107 108/*-------------------------------------------------------------------------*/ 109 110struct eth_dev { 111 spinlock_t lock; 112 struct usb_gadget *gadget; 113 struct usb_request *req; /* for control responses */ 114 struct usb_request *stat_req; /* for cdc & rndis status */ 115 116 u8 config; 117 struct usb_ep *in_ep, *out_ep, *status_ep; 118 const struct usb_endpoint_descriptor 119 *in, *out, *status; 120 struct list_head tx_reqs, rx_reqs; 121 122 struct net_device *net; 123 struct net_device_stats stats; 124 atomic_t tx_qlen; 125 126 struct work_struct work; 127 unsigned zlp:1; 128 unsigned cdc:1; 129 unsigned rndis:1; 130 unsigned suspended:1; 131 u16 cdc_filter; 132 unsigned long todo; 133#define WORK_RX_MEMORY 0 134 int rndis_config; 135 u8 host_mac [ETH_ALEN]; 136}; 137 138/* This version autoconfigures as much as possible at run-time. 139 * 140 * It also ASSUMES a self-powered device, without remote wakeup, 141 * although remote wakeup support would make sense. 142 */ 143static const char *EP_IN_NAME; 144static const char *EP_OUT_NAME; 145static const char *EP_STATUS_NAME; 146 147/*-------------------------------------------------------------------------*/ 148 149/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! 150 * Instead: allocate your own, using normal USB-IF procedures. 151 */ 152 153/* Thanks to NetChip Technologies for donating this product ID. 154 * It's for devices with only CDC Ethernet configurations. 155 */ 156#define CDC_VENDOR_NUM 0x0525 /* NetChip */ 157#define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */ 158 159/* For hardware that can't talk CDC, we use the same vendor ID that 160 * ARM Linux has used for ethernet-over-usb, both with sa1100 and 161 * with pxa250. We're protocol-compatible, if the host-side drivers 162 * use the endpoint descriptors. bcdDevice (version) is nonzero, so 163 * drivers that need to hard-wire endpoint numbers have a hook. 164 * 165 * The protocol is a minimal subset of CDC Ether, which works on any bulk 166 * hardware that's not deeply broken ... even on hardware that can't talk 167 * RNDIS (like SA-1100, with no interrupt endpoint, or anything that 168 * doesn't handle control-OUT). 169 */ 170#define SIMPLE_VENDOR_NUM 0x049f 171#define SIMPLE_PRODUCT_NUM 0x505a 172 173/* For hardware that can talk RNDIS and either of the above protocols, 174 * use this ID ... the windows INF files will know it. Unless it's 175 * used with CDC Ethernet, Linux 2.4 hosts will need updates to choose 176 * the non-RNDIS configuration. 177 */ 178#define RNDIS_VENDOR_NUM 0x0525 /* NetChip */ 179#define RNDIS_PRODUCT_NUM 0xa4a2 /* Ethernet/RNDIS Gadget */ 180 181 182/* Some systems will want different product identifers published in the 183 * device descriptor, either numbers or strings or both. These string 184 * parameters are in UTF-8 (superset of ASCII's 7 bit characters). 185 */ 186 187static ushort __initdata idVendor; 188module_param(idVendor, ushort, S_IRUGO); 189MODULE_PARM_DESC(idVendor, "USB Vendor ID"); 190 191static ushort __initdata idProduct; 192module_param(idProduct, ushort, S_IRUGO); 193MODULE_PARM_DESC(idProduct, "USB Product ID"); 194 195static ushort __initdata bcdDevice; 196module_param(bcdDevice, ushort, S_IRUGO); 197MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); 198 199static char *__initdata iManufacturer; 200module_param(iManufacturer, charp, S_IRUGO); 201MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); 202 203static char *__initdata iProduct; 204module_param(iProduct, charp, S_IRUGO); 205MODULE_PARM_DESC(iProduct, "USB Product string"); 206 207/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */ 208static char *__initdata dev_addr; 209module_param(dev_addr, charp, S_IRUGO); 210MODULE_PARM_DESC(dev_addr, "Device Ethernet Address"); 211 212/* this address is invisible to ifconfig */ 213static char *__initdata host_addr; 214module_param(host_addr, charp, S_IRUGO); 215MODULE_PARM_DESC(host_addr, "Host Ethernet Address"); 216 217 218/*-------------------------------------------------------------------------*/ 219 220/* Include CDC support if we could run on CDC-capable hardware. */ 221 222#ifdef CONFIG_USB_GADGET_NET2280 223#define DEV_CONFIG_CDC 224#endif 225 226#ifdef CONFIG_USB_GADGET_DUMMY_HCD 227#define DEV_CONFIG_CDC 228#endif 229 230#ifdef CONFIG_USB_GADGET_GOKU 231#define DEV_CONFIG_CDC 232#endif 233 234#ifdef CONFIG_USB_GADGET_LH7A40X 235#define DEV_CONFIG_CDC 236#endif 237 238#ifdef CONFIG_USB_GADGET_MQ11XX 239#define DEV_CONFIG_CDC 240#endif 241 242#ifdef CONFIG_USB_GADGET_OMAP 243#define DEV_CONFIG_CDC 244#endif 245 246#ifdef CONFIG_USB_GADGET_N9604 247#define DEV_CONFIG_CDC 248#endif 249 250#ifdef CONFIG_USB_GADGET_PXA27X 251#define DEV_CONFIG_CDC 252#endif 253 254#ifdef CONFIG_USB_GADGET_AT91 255#define DEV_CONFIG_CDC 256#endif 257 258 259/* For CDC-incapable hardware, choose the simple cdc subset. 260 * Anything that talks bulk (without notable bugs) can do this. 261 */ 262#ifdef CONFIG_USB_GADGET_PXA2XX 263#define DEV_CONFIG_SUBSET 264#endif 265 266#ifdef CONFIG_USB_GADGET_SH 267#define DEV_CONFIG_SUBSET 268#endif 269 270#ifdef CONFIG_USB_GADGET_SA1100 271/* use non-CDC for backwards compatibility */ 272#define DEV_CONFIG_SUBSET 273#endif 274 275#ifdef CONFIG_USB_GADGET_S3C2410 276#define DEV_CONFIG_CDC 277#endif 278 279/*-------------------------------------------------------------------------*/ 280 281/* "main" config is either CDC, or its simple subset */ 282static inline int is_cdc(struct eth_dev *dev) 283{ 284#if !defined(DEV_CONFIG_SUBSET) 285 return 1; /* only cdc possible */ 286#elif !defined (DEV_CONFIG_CDC) 287 return 0; /* only subset possible */ 288#else 289 return dev->cdc; /* depends on what hardware we found */ 290#endif 291} 292 293/* "secondary" RNDIS config may sometimes be activated */ 294static inline int rndis_active(struct eth_dev *dev) 295{ 296#ifdef CONFIG_USB_ETH_RNDIS 297 return dev->rndis; 298#else 299 return 0; 300#endif 301} 302 303#define subset_active(dev) (!is_cdc(dev) && !rndis_active(dev)) 304#define cdc_active(dev) ( is_cdc(dev) && !rndis_active(dev)) 305 306 307 308#define DEFAULT_QLEN 2 /* double buffering by default */ 309 310/* peak bulk transfer bits-per-second */ 311#define HS_BPS (13 * 512 * 8 * 1000 * 8) 312#define FS_BPS (19 * 64 * 1 * 1000 * 8) 313 314#ifdef CONFIG_USB_GADGET_DUALSPEED 315 316static unsigned qmult = 5; 317module_param (qmult, uint, S_IRUGO|S_IWUSR); 318 319 320/* for dual-speed hardware, use deeper queues at highspeed */ 321#define qlen(gadget) \ 322 (DEFAULT_QLEN*((gadget->speed == USB_SPEED_HIGH) ? qmult : 1)) 323 324/* also defer IRQs on highspeed TX */ 325#define TX_DELAY qmult 326 327static inline int BITRATE(struct usb_gadget *g) 328{ 329 return (g->speed == USB_SPEED_HIGH) ? HS_BPS : FS_BPS; 330} 331 332#else /* full speed (low speed doesn't do bulk) */ 333#define qlen(gadget) DEFAULT_QLEN 334 335static inline int BITRATE(struct usb_gadget *g) 336{ 337 return FS_BPS; 338} 339#endif 340 341 342/*-------------------------------------------------------------------------*/ 343 344#define xprintk(d,level,fmt,args...) \ 345 printk(level "%s: " fmt , (d)->net->name , ## args) 346 347#ifdef DEBUG 348#undef DEBUG 349#define DEBUG(dev,fmt,args...) \ 350 xprintk(dev , KERN_DEBUG , fmt , ## args) 351#else 352#define DEBUG(dev,fmt,args...) \ 353 do { } while (0) 354#endif /* DEBUG */ 355 356#ifdef VERBOSE 357#define VDEBUG DEBUG 358#else 359#define VDEBUG(dev,fmt,args...) \ 360 do { } while (0) 361#endif /* DEBUG */ 362 363#define ERROR(dev,fmt,args...) \ 364 xprintk(dev , KERN_ERR , fmt , ## args) 365#define WARN(dev,fmt,args...) \ 366 xprintk(dev , KERN_WARNING , fmt , ## args) 367#define INFO(dev,fmt,args...) \ 368 xprintk(dev , KERN_INFO , fmt , ## args) 369 370/*-------------------------------------------------------------------------*/ 371 372/* USB DRIVER HOOKUP (to the hardware driver, below us), mostly 373 * ep0 implementation: descriptors, config management, setup(). 374 * also optional class-specific notification interrupt transfer. 375 */ 376 377/* 378 * DESCRIPTORS ... most are static, but strings and (full) configuration 379 * descriptors are built on demand. For now we do either full CDC, or 380 * our simple subset, with RNDIS as an optional second configuration. 381 * 382 * RNDIS includes some CDC ACM descriptors ... like CDC Ethernet. But 383 * the class descriptors match a modem (they're ignored; it's really just 384 * Ethernet functionality), they don't need the NOP altsetting, and the 385 * status transfer endpoint isn't optional. 386 */ 387 388#define STRING_MANUFACTURER 1 389#define STRING_PRODUCT 2 390#define STRING_ETHADDR 3 391#define STRING_DATA 4 392#define STRING_CONTROL 5 393#define STRING_RNDIS_CONTROL 6 394#define STRING_CDC 7 395#define STRING_SUBSET 8 396#define STRING_RNDIS 9 397 398#define USB_BUFSIZ 256 /* holds our biggest descriptor */ 399 400/* 401 * This device advertises one configuration, eth_config, unless RNDIS 402 * is enabled (rndis_config) on hardware supporting at least two configs. 403 * 404 * NOTE: Controllers like superh_udc should probably be able to use 405 * an RNDIS-only configuration. 406 * 407 * FIXME define some higher-powered configurations to make it easier 408 * to recharge batteries ... 409 */ 410 411#define DEV_CONFIG_VALUE 1 /* cdc or subset */ 412#define DEV_RNDIS_CONFIG_VALUE 2 /* rndis; optional */ 413 414static struct usb_device_descriptor 415device_desc = { 416 .bLength = sizeof device_desc, 417 .bDescriptorType = USB_DT_DEVICE, 418 419 .bcdUSB = __constant_cpu_to_le16 (0x0200), 420 421 .bDeviceClass = USB_CLASS_COMM, 422 .bDeviceSubClass = 0, 423 .bDeviceProtocol = 0, 424 425 .idVendor = __constant_cpu_to_le16 (CDC_VENDOR_NUM), 426 .idProduct = __constant_cpu_to_le16 (CDC_PRODUCT_NUM), 427 .iManufacturer = STRING_MANUFACTURER, 428 .iProduct = STRING_PRODUCT, 429 .bNumConfigurations = 1, 430}; 431 432static struct usb_otg_descriptor 433otg_descriptor = { 434 .bLength = sizeof otg_descriptor, 435 .bDescriptorType = USB_DT_OTG, 436 437 .bmAttributes = USB_OTG_SRP, 438}; 439 440static struct usb_config_descriptor 441eth_config = { 442 .bLength = sizeof eth_config, 443 .bDescriptorType = USB_DT_CONFIG, 444 445 /* compute wTotalLength on the fly */ 446 .bNumInterfaces = 2, 447 .bConfigurationValue = DEV_CONFIG_VALUE, 448 .iConfiguration = STRING_CDC, 449 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 450 .bMaxPower = 50, 451}; 452 453#ifdef CONFIG_USB_ETH_RNDIS 454static struct usb_config_descriptor 455rndis_config = { 456 .bLength = sizeof rndis_config, 457 .bDescriptorType = USB_DT_CONFIG, 458 459 /* compute wTotalLength on the fly */ 460 .bNumInterfaces = 2, 461 .bConfigurationValue = DEV_RNDIS_CONFIG_VALUE, 462 .iConfiguration = STRING_RNDIS, 463 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 464 .bMaxPower = 50, 465}; 466#endif 467 468/* 469 * Compared to the simple CDC subset, the full CDC Ethernet model adds 470 * three class descriptors, two interface descriptors, optional status 471 * endpoint. Both have a "data" interface and two bulk endpoints. 472 * There are also differences in how control requests are handled. 473 * 474 * RNDIS shares a lot with CDC-Ethernet, since it's a variant of 475 * the CDC-ACM (modem) spec. 476 */ 477 478#ifdef DEV_CONFIG_CDC 479static struct usb_interface_descriptor 480control_intf = { 481 .bLength = sizeof control_intf, 482 .bDescriptorType = USB_DT_INTERFACE, 483 484 .bInterfaceNumber = 0, 485 /* status endpoint is optional; this may be patched later */ 486 .bNumEndpoints = 1, 487 .bInterfaceClass = USB_CLASS_COMM, 488 .bInterfaceSubClass = USB_CDC_SUBCLASS_ETHERNET, 489 .bInterfaceProtocol = USB_CDC_PROTO_NONE, 490 .iInterface = STRING_CONTROL, 491}; 492#endif 493 494#ifdef CONFIG_USB_ETH_RNDIS 495static const struct usb_interface_descriptor 496rndis_control_intf = { 497 .bLength = sizeof rndis_control_intf, 498 .bDescriptorType = USB_DT_INTERFACE, 499 500 .bInterfaceNumber = 0, 501 .bNumEndpoints = 1, 502 .bInterfaceClass = USB_CLASS_COMM, 503 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, 504 .bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR, 505 .iInterface = STRING_RNDIS_CONTROL, 506}; 507#endif 508 509#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 510 511static const struct usb_cdc_header_desc header_desc = { 512 .bLength = sizeof header_desc, 513 .bDescriptorType = USB_DT_CS_INTERFACE, 514 .bDescriptorSubType = USB_CDC_HEADER_TYPE, 515 516 .bcdCDC = __constant_cpu_to_le16 (0x0110), 517}; 518 519static const struct usb_cdc_union_desc union_desc = { 520 .bLength = sizeof union_desc, 521 .bDescriptorType = USB_DT_CS_INTERFACE, 522 .bDescriptorSubType = USB_CDC_UNION_TYPE, 523 524 .bMasterInterface0 = 0, /* index of control interface */ 525 .bSlaveInterface0 = 1, /* index of DATA interface */ 526}; 527 528#endif /* CDC || RNDIS */ 529 530#ifdef CONFIG_USB_ETH_RNDIS 531 532static const struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = { 533 .bLength = sizeof call_mgmt_descriptor, 534 .bDescriptorType = USB_DT_CS_INTERFACE, 535 .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, 536 537 .bmCapabilities = 0x00, 538 .bDataInterface = 0x01, 539}; 540 541static struct usb_cdc_acm_descriptor acm_descriptor = { 542 .bLength = sizeof acm_descriptor, 543 .bDescriptorType = USB_DT_CS_INTERFACE, 544 .bDescriptorSubType = USB_CDC_ACM_TYPE, 545 546 .bmCapabilities = 0x00, 547}; 548 549#endif 550 551#ifdef DEV_CONFIG_CDC 552 553static const struct usb_cdc_ether_desc ether_desc = { 554 .bLength = sizeof ether_desc, 555 .bDescriptorType = USB_DT_CS_INTERFACE, 556 .bDescriptorSubType = USB_CDC_ETHERNET_TYPE, 557 558 /* this descriptor actually adds value, surprise! */ 559 .iMACAddress = STRING_ETHADDR, 560 .bmEthernetStatistics = __constant_cpu_to_le32 (0), /* no statistics */ 561 .wMaxSegmentSize = __constant_cpu_to_le16 (ETH_FRAME_LEN), 562 .wNumberMCFilters = __constant_cpu_to_le16 (0), 563 .bNumberPowerFilters = 0, 564}; 565 566#endif 567 568#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 569 570/* include the status endpoint if we can, even where it's optional. 571 * use wMaxPacketSize big enough to fit CDC_NOTIFY_SPEED_CHANGE in one 572 * packet, to simplify cancellation; and a big transfer interval, to 573 * waste less bandwidth. 574 * 575 * some drivers (like Linux 2.4 cdc-ether!) "need" it to exist even 576 * if they ignore the connect/disconnect notifications that real aether 577 * can provide. more advanced cdc configurations might want to support 578 * encapsulated commands (vendor-specific, using control-OUT). 579 * 580 * RNDIS requires the status endpoint, since it uses that encapsulation 581 * mechanism for its funky RPC scheme. 582 */ 583 584#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */ 585#define STATUS_BYTECOUNT 16 /* 8 byte header + data */ 586 587static struct usb_endpoint_descriptor 588fs_status_desc = { 589 .bLength = USB_DT_ENDPOINT_SIZE, 590 .bDescriptorType = USB_DT_ENDPOINT, 591 592 .bEndpointAddress = USB_DIR_IN, 593 .bmAttributes = USB_ENDPOINT_XFER_INT, 594 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT), 595 .bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC, 596}; 597#endif 598 599#ifdef DEV_CONFIG_CDC 600 601/* the default data interface has no endpoints ... */ 602 603static const struct usb_interface_descriptor 604data_nop_intf = { 605 .bLength = sizeof data_nop_intf, 606 .bDescriptorType = USB_DT_INTERFACE, 607 608 .bInterfaceNumber = 1, 609 .bAlternateSetting = 0, 610 .bNumEndpoints = 0, 611 .bInterfaceClass = USB_CLASS_CDC_DATA, 612 .bInterfaceSubClass = 0, 613 .bInterfaceProtocol = 0, 614}; 615 616/* ... but the "real" data interface has two bulk endpoints */ 617 618static const struct usb_interface_descriptor 619data_intf = { 620 .bLength = sizeof data_intf, 621 .bDescriptorType = USB_DT_INTERFACE, 622 623 .bInterfaceNumber = 1, 624 .bAlternateSetting = 1, 625 .bNumEndpoints = 2, 626 .bInterfaceClass = USB_CLASS_CDC_DATA, 627 .bInterfaceSubClass = 0, 628 .bInterfaceProtocol = 0, 629 .iInterface = STRING_DATA, 630}; 631 632#endif 633 634#ifdef CONFIG_USB_ETH_RNDIS 635 636/* RNDIS doesn't activate by changing to the "real" altsetting */ 637 638static const struct usb_interface_descriptor 639rndis_data_intf = { 640 .bLength = sizeof rndis_data_intf, 641 .bDescriptorType = USB_DT_INTERFACE, 642 643 .bInterfaceNumber = 1, 644 .bAlternateSetting = 0, 645 .bNumEndpoints = 2, 646 .bInterfaceClass = USB_CLASS_CDC_DATA, 647 .bInterfaceSubClass = 0, 648 .bInterfaceProtocol = 0, 649 .iInterface = STRING_DATA, 650}; 651 652#endif 653 654#ifdef DEV_CONFIG_SUBSET 655 656/* 657 * "Simple" CDC-subset option is a simple vendor-neutral model that most 658 * full speed controllers can handle: one interface, two bulk endpoints. 659 */ 660 661static const struct usb_interface_descriptor 662subset_data_intf = { 663 .bLength = sizeof subset_data_intf, 664 .bDescriptorType = USB_DT_INTERFACE, 665 666 .bInterfaceNumber = 0, 667 .bAlternateSetting = 0, 668 .bNumEndpoints = 2, 669 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 670 .bInterfaceSubClass = 0, 671 .bInterfaceProtocol = 0, 672 .iInterface = STRING_DATA, 673}; 674 675#endif /* SUBSET */ 676 677 678static struct usb_endpoint_descriptor 679fs_source_desc = { 680 .bLength = USB_DT_ENDPOINT_SIZE, 681 .bDescriptorType = USB_DT_ENDPOINT, 682 683 .bEndpointAddress = USB_DIR_IN, 684 .bmAttributes = USB_ENDPOINT_XFER_BULK, 685}; 686 687static struct usb_endpoint_descriptor 688fs_sink_desc = { 689 .bLength = USB_DT_ENDPOINT_SIZE, 690 .bDescriptorType = USB_DT_ENDPOINT, 691 692 .bEndpointAddress = USB_DIR_OUT, 693 .bmAttributes = USB_ENDPOINT_XFER_BULK, 694}; 695 696static const struct usb_descriptor_header *fs_eth_function [11] = { 697 (struct usb_descriptor_header *) &otg_descriptor, 698#ifdef DEV_CONFIG_CDC 699 /* "cdc" mode descriptors */ 700 (struct usb_descriptor_header *) &control_intf, 701 (struct usb_descriptor_header *) &header_desc, 702 (struct usb_descriptor_header *) &union_desc, 703 (struct usb_descriptor_header *) ðer_desc, 704 /* NOTE: status endpoint may need to be removed */ 705 (struct usb_descriptor_header *) &fs_status_desc, 706 /* data interface, with altsetting */ 707 (struct usb_descriptor_header *) &data_nop_intf, 708 (struct usb_descriptor_header *) &data_intf, 709 (struct usb_descriptor_header *) &fs_source_desc, 710 (struct usb_descriptor_header *) &fs_sink_desc, 711 NULL, 712#endif /* DEV_CONFIG_CDC */ 713}; 714 715static inline void __init fs_subset_descriptors(void) 716{ 717#ifdef DEV_CONFIG_SUBSET 718 fs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf; 719 fs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc; 720 fs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc; 721 fs_eth_function[4] = NULL; 722#else 723 fs_eth_function[1] = NULL; 724#endif 725} 726 727#ifdef CONFIG_USB_ETH_RNDIS 728static const struct usb_descriptor_header *fs_rndis_function [] = { 729 (struct usb_descriptor_header *) &otg_descriptor, 730 /* control interface matches ACM, not Ethernet */ 731 (struct usb_descriptor_header *) &rndis_control_intf, 732 (struct usb_descriptor_header *) &header_desc, 733 (struct usb_descriptor_header *) &call_mgmt_descriptor, 734 (struct usb_descriptor_header *) &acm_descriptor, 735 (struct usb_descriptor_header *) &union_desc, 736 (struct usb_descriptor_header *) &fs_status_desc, 737 /* data interface has no altsetting */ 738 (struct usb_descriptor_header *) &rndis_data_intf, 739 (struct usb_descriptor_header *) &fs_source_desc, 740 (struct usb_descriptor_header *) &fs_sink_desc, 741 NULL, 742}; 743#endif 744 745#ifdef CONFIG_USB_GADGET_DUALSPEED 746 747/* 748 * usb 2.0 devices need to expose both high speed and full speed 749 * descriptors, unless they only run at full speed. 750 */ 751 752#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 753static struct usb_endpoint_descriptor 754hs_status_desc = { 755 .bLength = USB_DT_ENDPOINT_SIZE, 756 .bDescriptorType = USB_DT_ENDPOINT, 757 758 .bmAttributes = USB_ENDPOINT_XFER_INT, 759 .wMaxPacketSize = __constant_cpu_to_le16 (STATUS_BYTECOUNT), 760 .bInterval = LOG2_STATUS_INTERVAL_MSEC + 4, 761}; 762#endif /* DEV_CONFIG_CDC */ 763 764static struct usb_endpoint_descriptor 765hs_source_desc = { 766 .bLength = USB_DT_ENDPOINT_SIZE, 767 .bDescriptorType = USB_DT_ENDPOINT, 768 769 .bmAttributes = USB_ENDPOINT_XFER_BULK, 770 .wMaxPacketSize = __constant_cpu_to_le16 (512), 771}; 772 773static struct usb_endpoint_descriptor 774hs_sink_desc = { 775 .bLength = USB_DT_ENDPOINT_SIZE, 776 .bDescriptorType = USB_DT_ENDPOINT, 777 778 .bmAttributes = USB_ENDPOINT_XFER_BULK, 779 .wMaxPacketSize = __constant_cpu_to_le16 (512), 780}; 781 782static struct usb_qualifier_descriptor 783dev_qualifier = { 784 .bLength = sizeof dev_qualifier, 785 .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 786 787 .bcdUSB = __constant_cpu_to_le16 (0x0200), 788 .bDeviceClass = USB_CLASS_COMM, 789 790 .bNumConfigurations = 1, 791}; 792 793static const struct usb_descriptor_header *hs_eth_function [11] = { 794 (struct usb_descriptor_header *) &otg_descriptor, 795#ifdef DEV_CONFIG_CDC 796 /* "cdc" mode descriptors */ 797 (struct usb_descriptor_header *) &control_intf, 798 (struct usb_descriptor_header *) &header_desc, 799 (struct usb_descriptor_header *) &union_desc, 800 (struct usb_descriptor_header *) ðer_desc, 801 /* NOTE: status endpoint may need to be removed */ 802 (struct usb_descriptor_header *) &hs_status_desc, 803 /* data interface, with altsetting */ 804 (struct usb_descriptor_header *) &data_nop_intf, 805 (struct usb_descriptor_header *) &data_intf, 806 (struct usb_descriptor_header *) &hs_source_desc, 807 (struct usb_descriptor_header *) &hs_sink_desc, 808 NULL, 809#endif /* DEV_CONFIG_CDC */ 810}; 811 812static inline void __init hs_subset_descriptors(void) 813{ 814#ifdef DEV_CONFIG_SUBSET 815 hs_eth_function[1] = (struct usb_descriptor_header *) &subset_data_intf; 816 hs_eth_function[2] = (struct usb_descriptor_header *) &fs_source_desc; 817 hs_eth_function[3] = (struct usb_descriptor_header *) &fs_sink_desc; 818 hs_eth_function[4] = NULL; 819#else 820 hs_eth_function[1] = NULL; 821#endif 822} 823 824#ifdef CONFIG_USB_ETH_RNDIS 825static const struct usb_descriptor_header *hs_rndis_function [] = { 826 (struct usb_descriptor_header *) &otg_descriptor, 827 /* control interface matches ACM, not Ethernet */ 828 (struct usb_descriptor_header *) &rndis_control_intf, 829 (struct usb_descriptor_header *) &header_desc, 830 (struct usb_descriptor_header *) &call_mgmt_descriptor, 831 (struct usb_descriptor_header *) &acm_descriptor, 832 (struct usb_descriptor_header *) &union_desc, 833 (struct usb_descriptor_header *) &hs_status_desc, 834 /* data interface has no altsetting */ 835 (struct usb_descriptor_header *) &rndis_data_intf, 836 (struct usb_descriptor_header *) &hs_source_desc, 837 (struct usb_descriptor_header *) &hs_sink_desc, 838 NULL, 839}; 840#endif 841 842 843/* maxpacket and other transfer characteristics vary by speed. */ 844#define ep_desc(g,hs,fs) (((g)->speed==USB_SPEED_HIGH)?(hs):(fs)) 845 846#else 847 848/* if there's no high speed support, maxpacket doesn't change. */ 849#define ep_desc(g,hs,fs) fs 850 851static inline void __init hs_subset_descriptors(void) 852{ 853} 854 855#endif /* !CONFIG_USB_GADGET_DUALSPEED */ 856 857/*-------------------------------------------------------------------------*/ 858 859/* descriptors that are built on-demand */ 860 861static char manufacturer [50]; 862static char product_desc [40] = DRIVER_DESC; 863 864#ifdef DEV_CONFIG_CDC 865/* address that the host will use ... usually assigned at random */ 866static char ethaddr [2 * ETH_ALEN + 1]; 867#endif 868 869/* static strings, in UTF-8 */ 870static struct usb_string strings [] = { 871 { STRING_MANUFACTURER, manufacturer, }, 872 { STRING_PRODUCT, product_desc, }, 873 { STRING_DATA, "Ethernet Data", }, 874#ifdef DEV_CONFIG_CDC 875 { STRING_CDC, "CDC Ethernet", }, 876 { STRING_ETHADDR, ethaddr, }, 877 { STRING_CONTROL, "CDC Communications Control", }, 878#endif 879#ifdef DEV_CONFIG_SUBSET 880 { STRING_SUBSET, "CDC Ethernet Subset", }, 881#endif 882#ifdef CONFIG_USB_ETH_RNDIS 883 { STRING_RNDIS, "RNDIS", }, 884 { STRING_RNDIS_CONTROL, "RNDIS Communications Control", }, 885#endif 886 { } /* end of list */ 887}; 888 889static struct usb_gadget_strings stringtab = { 890 .language = 0x0409, /* en-us */ 891 .strings = strings, 892}; 893 894/* 895 * one config, two interfaces: control, data. 896 * complications: class descriptors, and an altsetting. 897 */ 898static int 899config_buf (enum usb_device_speed speed, 900 u8 *buf, u8 type, 901 unsigned index, int is_otg) 902{ 903 int len; 904 const struct usb_config_descriptor *config; 905 const struct usb_descriptor_header **function; 906#ifdef CONFIG_USB_GADGET_DUALSPEED 907 int hs = (speed == USB_SPEED_HIGH); 908 909 if (type == USB_DT_OTHER_SPEED_CONFIG) 910 hs = !hs; 911#define which_fn(t) (hs ? hs_ ## t ## _function : fs_ ## t ## _function) 912#else 913#define which_fn(t) (fs_ ## t ## _function) 914#endif 915 916 if (index >= device_desc.bNumConfigurations) 917 return -EINVAL; 918 919#ifdef CONFIG_USB_ETH_RNDIS 920 /* list the RNDIS config first, to make Microsoft's drivers 921 * happy. DOCSIS 1.0 needs this too. 922 */ 923 if (device_desc.bNumConfigurations == 2 && index == 0) { 924 config = &rndis_config; 925 function = which_fn (rndis); 926 } else 927#endif 928 { 929 config = ð_config; 930 function = which_fn (eth); 931 } 932 933 /* for now, don't advertise srp-only devices */ 934 if (!is_otg) 935 function++; 936 937 len = usb_gadget_config_buf (config, buf, USB_BUFSIZ, function); 938 if (len < 0) 939 return len; 940 ((struct usb_config_descriptor *) buf)->bDescriptorType = type; 941 return len; 942} 943 944/*-------------------------------------------------------------------------*/ 945 946static void eth_start (struct eth_dev *dev, int gfp_flags); 947static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags); 948 949#ifdef DEV_CONFIG_CDC 950static inline int ether_alt_ep_setup (struct eth_dev *dev, struct usb_ep *ep) 951{ 952 const struct usb_endpoint_descriptor *d; 953 954 /* With CDC, the host isn't allowed to use these two data 955 * endpoints in the default altsetting for the interface. 956 * so we don't activate them yet. Reset from SET_INTERFACE. 957 * 958 * Strictly speaking RNDIS should work the same: activation is 959 * a side effect of setting a packet filter. Deactivation is 960 * from REMOTE_NDIS_HALT_MSG, reset from REMOTE_NDIS_RESET_MSG. 961 */ 962 963 /* one endpoint writes data back IN to the host */ 964 if (strcmp (ep->name, EP_IN_NAME) == 0) { 965 d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc); 966 ep->driver_data = dev; 967 dev->in = d; 968 969 /* one endpoint just reads OUT packets */ 970 } else if (strcmp (ep->name, EP_OUT_NAME) == 0) { 971 d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc); 972 ep->driver_data = dev; 973 dev->out = d; 974 975 /* optional status/notification endpoint */ 976 } else if (EP_STATUS_NAME && 977 strcmp (ep->name, EP_STATUS_NAME) == 0) { 978 int result; 979 980 d = ep_desc (dev->gadget, &hs_status_desc, &fs_status_desc); 981 result = usb_ep_enable (ep, d); 982 if (result < 0) 983 return result; 984 985 ep->driver_data = dev; 986 dev->status = d; 987 } 988 return 0; 989} 990#endif 991 992#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) 993static inline int ether_ep_setup (struct eth_dev *dev, struct usb_ep *ep) 994{ 995 int result; 996 const struct usb_endpoint_descriptor *d; 997 998 /* CDC subset is simpler: if the device is there, 999 * it's live with rx and tx endpoints. 1000 * 1001 * Do this as a shortcut for RNDIS too. 1002 */ 1003 1004 /* one endpoint writes data back IN to the host */ 1005 if (strcmp (ep->name, EP_IN_NAME) == 0) { 1006 d = ep_desc (dev->gadget, &hs_source_desc, &fs_source_desc); 1007 result = usb_ep_enable (ep, d); 1008 if (result < 0) 1009 return result; 1010 1011 ep->driver_data = dev; 1012 dev->in = d; 1013 1014 /* one endpoint just reads OUT packets */ 1015 } else if (strcmp (ep->name, EP_OUT_NAME) == 0) { 1016 d = ep_desc (dev->gadget, &hs_sink_desc, &fs_sink_desc); 1017 result = usb_ep_enable (ep, d); 1018 if (result < 0) 1019 return result; 1020 1021 ep->driver_data = dev; 1022 dev->out = d; 1023 } 1024 1025 return 0; 1026} 1027#endif 1028 1029static int 1030set_ether_config (struct eth_dev *dev, int gfp_flags) 1031{ 1032 int result = 0; 1033 struct usb_ep *ep; 1034 struct usb_gadget *gadget = dev->gadget; 1035 1036 gadget_for_each_ep (ep, gadget) { 1037#ifdef DEV_CONFIG_CDC 1038 if (!dev->rndis && dev->cdc) { 1039 result = ether_alt_ep_setup (dev, ep); 1040 if (result == 0) 1041 continue; 1042 } 1043#endif 1044 1045#ifdef CONFIG_USB_ETH_RNDIS 1046 if (dev->rndis && strcmp (ep->name, EP_STATUS_NAME) == 0) { 1047 const struct usb_endpoint_descriptor *d; 1048 d = ep_desc (gadget, &hs_status_desc, &fs_status_desc); 1049 result = usb_ep_enable (ep, d); 1050 if (result == 0) { 1051 ep->driver_data = dev; 1052 dev->status = d; 1053 continue; 1054 } 1055 } else 1056#endif 1057 1058 { 1059#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) 1060 result = ether_ep_setup (dev, ep); 1061 if (result == 0) 1062 continue; 1063#endif 1064 } 1065 1066 /* stop on error */ 1067 ERROR (dev, "can't enable %s, result %d\n", ep->name, result); 1068 break; 1069 } 1070 if (!result && (!dev->in_ep || !dev->out_ep)) 1071 result = -ENODEV; 1072 1073 if (result == 0) 1074 result = alloc_requests (dev, qlen (gadget), gfp_flags); 1075 1076 /* on error, disable any endpoints */ 1077 if (result < 0) { 1078#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 1079 if (dev->status) 1080 (void) usb_ep_disable (dev->status_ep); 1081#endif 1082 dev->status = NULL; 1083#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) 1084 if (dev->rndis || !dev->cdc) { 1085 if (dev->in) 1086 (void) usb_ep_disable (dev->in_ep); 1087 if (dev->out) 1088 (void) usb_ep_disable (dev->out_ep); 1089 } 1090#endif 1091 dev->in = NULL; 1092 dev->out = NULL; 1093 } else 1094 1095 /* activate non-CDC configs right away 1096 * this isn't strictly according to the RNDIS spec 1097 */ 1098#if defined(DEV_CONFIG_SUBSET) || defined(CONFIG_USB_ETH_RNDIS) 1099 if (dev->rndis || !dev->cdc) { 1100 netif_carrier_on (dev->net); 1101 if (netif_running (dev->net)) { 1102 spin_unlock (&dev->lock); 1103 eth_start (dev, GFP_ATOMIC); 1104 spin_lock (&dev->lock); 1105 } 1106 } 1107#endif 1108 1109 if (result == 0) 1110 DEBUG (dev, "qlen %d\n", qlen (gadget)); 1111 1112 /* caller is responsible for cleanup on error */ 1113 return result; 1114} 1115 1116static void eth_reset_config (struct eth_dev *dev) 1117{ 1118 struct usb_request *req; 1119 1120 if (dev->config == 0) 1121 return; 1122 1123 DEBUG (dev, "%s\n", __FUNCTION__); 1124 1125 netif_stop_queue (dev->net); 1126 netif_carrier_off (dev->net); 1127 1128 /* disable endpoints, forcing (synchronous) completion of 1129 * pending i/o. then free the requests. 1130 */ 1131 if (dev->in) { 1132 usb_ep_disable (dev->in_ep); 1133 while (likely (!list_empty (&dev->tx_reqs))) { 1134 req = container_of (dev->tx_reqs.next, 1135 struct usb_request, list); 1136 list_del (&req->list); 1137 usb_ep_free_request (dev->in_ep, req); 1138 } 1139 } 1140 if (dev->out) { 1141 usb_ep_disable (dev->out_ep); 1142 while (likely (!list_empty (&dev->rx_reqs))) { 1143 req = container_of (dev->rx_reqs.next, 1144 struct usb_request, list); 1145 list_del (&req->list); 1146 usb_ep_free_request (dev->out_ep, req); 1147 } 1148 } 1149 1150 if (dev->status) { 1151 usb_ep_disable (dev->status_ep); 1152 } 1153 dev->config = 0; 1154} 1155 1156/* change our operational config. must agree with the code 1157 * that returns config descriptors, and altsetting code. 1158 */ 1159static int 1160eth_set_config (struct eth_dev *dev, unsigned number, int gfp_flags) 1161{ 1162 int result = 0; 1163 struct usb_gadget *gadget = dev->gadget; 1164 1165 if (number == dev->config) 1166 return 0; 1167 1168 if (gadget_is_sa1100 (gadget) 1169 && dev->config 1170 && atomic_read (&dev->tx_qlen) != 0) { 1171 /* tx fifo is full, but we can't clear it...*/ 1172 INFO (dev, "can't change configurations\n"); 1173 return -ESPIPE; 1174 } 1175 eth_reset_config (dev); 1176 1177 /* default: pass all packets, no multicast filtering */ 1178 dev->cdc_filter = DEFAULT_FILTER; 1179 1180 switch (number) { 1181 case DEV_CONFIG_VALUE: 1182 dev->rndis = 0; 1183 result = set_ether_config (dev, gfp_flags); 1184 break; 1185#ifdef CONFIG_USB_ETH_RNDIS 1186 case DEV_RNDIS_CONFIG_VALUE: 1187 dev->rndis = 1; 1188 result = set_ether_config (dev, gfp_flags); 1189 break; 1190#endif 1191 default: 1192 result = -EINVAL; 1193 /* FALL THROUGH */ 1194 case 0: 1195 break; 1196 } 1197 1198 if (result) { 1199 if (number) 1200 eth_reset_config (dev); 1201 usb_gadget_vbus_draw(dev->gadget, 1202 dev->gadget->is_otg ? 8 : 100); 1203 } else { 1204 char *speed; 1205 unsigned power; 1206 1207 power = 2 * eth_config.bMaxPower; 1208 usb_gadget_vbus_draw(dev->gadget, power); 1209 1210 switch (gadget->speed) { 1211 case USB_SPEED_FULL: speed = "full"; break; 1212#ifdef CONFIG_USB_GADGET_DUALSPEED 1213 case USB_SPEED_HIGH: speed = "high"; break; 1214#endif 1215 default: speed = "?"; break; 1216 } 1217 1218 dev->config = number; 1219 INFO (dev, "%s speed config #%d: %d mA, %s, using %s\n", 1220 speed, number, power, driver_desc, 1221 dev->rndis 1222 ? "RNDIS" 1223 : (dev->cdc 1224 ? "CDC Ethernet" 1225 : "CDC Ethernet Subset")); 1226 } 1227 return result; 1228} 1229 1230/*-------------------------------------------------------------------------*/ 1231 1232#ifdef DEV_CONFIG_CDC 1233 1234static void eth_status_complete (struct usb_ep *ep, struct usb_request *req) 1235{ 1236 struct usb_cdc_notification *event = req->buf; 1237 int value = req->status; 1238 struct eth_dev *dev = ep->driver_data; 1239 1240 /* issue the second notification if host reads the first */ 1241 if (event->bNotificationType == USB_CDC_NOTIFY_NETWORK_CONNECTION 1242 && value == 0) { 1243 __le32 *data = req->buf + sizeof *event; 1244 1245 event->bmRequestType = 0xA1; 1246 event->bNotificationType = USB_CDC_NOTIFY_SPEED_CHANGE; 1247 event->wValue = __constant_cpu_to_le16 (0); 1248 event->wIndex = __constant_cpu_to_le16 (1); 1249 event->wLength = __constant_cpu_to_le16 (8); 1250 1251 /* SPEED_CHANGE data is up/down speeds in bits/sec */ 1252 data [0] = data [1] = cpu_to_le32 (BITRATE (dev->gadget)); 1253 1254 req->length = STATUS_BYTECOUNT; 1255 value = usb_ep_queue (ep, req, GFP_ATOMIC); 1256 DEBUG (dev, "send SPEED_CHANGE --> %d\n", value); 1257 if (value == 0) 1258 return; 1259 } else if (value != -ECONNRESET) 1260 DEBUG (dev, "event %02x --> %d\n", 1261 event->bNotificationType, value); 1262 event->bmRequestType = 0xff; 1263} 1264 1265static void issue_start_status (struct eth_dev *dev) 1266{ 1267 struct usb_request *req = dev->stat_req; 1268 struct usb_cdc_notification *event; 1269 int value; 1270 1271 DEBUG (dev, "%s, flush old status first\n", __FUNCTION__); 1272 1273 /* flush old status 1274 * 1275 * FIXME ugly idiom, maybe we'd be better with just 1276 * a "cancel the whole queue" primitive since any 1277 * unlink-one primitive has way too many error modes. 1278 * here, we "know" toggle is already clear... 1279 */ 1280 usb_ep_disable (dev->status_ep); 1281 usb_ep_enable (dev->status_ep, dev->status); 1282 1283 /* 3.8.1 says to issue first NETWORK_CONNECTION, then 1284 * a SPEED_CHANGE. could be useful in some configs. 1285 */ 1286 event = req->buf; 1287 event->bmRequestType = 0xA1; 1288 event->bNotificationType = USB_CDC_NOTIFY_NETWORK_CONNECTION; 1289 event->wValue = __constant_cpu_to_le16 (1); /* connected */ 1290 event->wIndex = __constant_cpu_to_le16 (1); 1291 event->wLength = 0; 1292 1293 req->length = sizeof *event; 1294 req->complete = eth_status_complete; 1295 value = usb_ep_queue (dev->status_ep, req, GFP_ATOMIC); 1296 if (value < 0) 1297 DEBUG (dev, "status buf queue --> %d\n", value); 1298} 1299 1300#endif 1301 1302/*-------------------------------------------------------------------------*/ 1303 1304static void eth_setup_complete (struct usb_ep *ep, struct usb_request *req) 1305{ 1306 if (req->status || req->actual != req->length) 1307 DEBUG ((struct eth_dev *) ep->driver_data, 1308 "setup complete --> %d, %d/%d\n", 1309 req->status, req->actual, req->length); 1310} 1311 1312#ifdef CONFIG_USB_ETH_RNDIS 1313 1314static void rndis_response_complete (struct usb_ep *ep, struct usb_request *req) 1315{ 1316 if (req->status || req->actual != req->length) 1317 DEBUG ((struct eth_dev *) ep->driver_data, 1318 "rndis response complete --> %d, %d/%d\n", 1319 req->status, req->actual, req->length); 1320 1321 /* done sending after USB_CDC_GET_ENCAPSULATED_RESPONSE */ 1322} 1323 1324static void rndis_command_complete (struct usb_ep *ep, struct usb_request *req) 1325{ 1326 struct eth_dev *dev = ep->driver_data; 1327 int status; 1328 1329 /* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */ 1330 spin_lock(&dev->lock); 1331 status = rndis_msg_parser (dev->rndis_config, (u8 *) req->buf); 1332 if (status < 0) 1333 ERROR(dev, "%s: rndis parse error %d\n", __FUNCTION__, status); 1334 spin_unlock(&dev->lock); 1335} 1336 1337#endif /* RNDIS */ 1338 1339/* 1340 * The setup() callback implements all the ep0 functionality that's not 1341 * handled lower down. CDC has a number of less-common features: 1342 * 1343 * - two interfaces: control, and ethernet data 1344 * - Ethernet data interface has two altsettings: default, and active 1345 * - class-specific descriptors for the control interface 1346 * - class-specific control requests 1347 */ 1348static int 1349eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) 1350{ 1351 struct eth_dev *dev = get_gadget_data (gadget); 1352 struct usb_request *req = dev->req; 1353 int value = -EOPNOTSUPP; 1354 u16 wIndex = (__force u16) ctrl->wIndex; 1355 u16 wValue = (__force u16) ctrl->wValue; 1356 u16 wLength = (__force u16) ctrl->wLength; 1357 1358 /* descriptors just go into the pre-allocated ep0 buffer, 1359 * while config change events may enable network traffic. 1360 */ 1361 req->complete = eth_setup_complete; 1362 switch (ctrl->bRequest) { 1363 1364 case USB_REQ_GET_DESCRIPTOR: 1365 if (ctrl->bRequestType != USB_DIR_IN) 1366 break; 1367 switch (wValue >> 8) { 1368 1369 case USB_DT_DEVICE: 1370 value = min (wLength, (u16) sizeof device_desc); 1371 memcpy (req->buf, &device_desc, value); 1372 break; 1373#ifdef CONFIG_USB_GADGET_DUALSPEED 1374 case USB_DT_DEVICE_QUALIFIER: 1375 if (!gadget->is_dualspeed) 1376 break; 1377 value = min (wLength, (u16) sizeof dev_qualifier); 1378 memcpy (req->buf, &dev_qualifier, value); 1379 break; 1380 1381 case USB_DT_OTHER_SPEED_CONFIG: 1382 if (!gadget->is_dualspeed) 1383 break; 1384 // FALLTHROUGH 1385#endif /* CONFIG_USB_GADGET_DUALSPEED */ 1386 case USB_DT_CONFIG: 1387 value = config_buf (gadget->speed, req->buf, 1388 wValue >> 8, 1389 wValue & 0xff, 1390 gadget->is_otg); 1391 if (value >= 0) 1392 value = min (wLength, (u16) value); 1393 break; 1394 1395 case USB_DT_STRING: 1396 value = usb_gadget_get_string (&stringtab, 1397 wValue & 0xff, req->buf); 1398 if (value >= 0) 1399 value = min (wLength, (u16) value); 1400 break; 1401 } 1402 break; 1403 1404 case USB_REQ_SET_CONFIGURATION: 1405 if (ctrl->bRequestType != 0) 1406 break; 1407 if (gadget->a_hnp_support) 1408 DEBUG (dev, "HNP available\n"); 1409 else if (gadget->a_alt_hnp_support) 1410 DEBUG (dev, "HNP needs a different root port\n"); 1411 spin_lock (&dev->lock); 1412 value = eth_set_config (dev, wValue, GFP_ATOMIC); 1413 spin_unlock (&dev->lock); 1414 break; 1415 case USB_REQ_GET_CONFIGURATION: 1416 if (ctrl->bRequestType != USB_DIR_IN) 1417 break; 1418 *(u8 *)req->buf = dev->config; 1419 value = min (wLength, (u16) 1); 1420 break; 1421 1422 case USB_REQ_SET_INTERFACE: 1423 if (ctrl->bRequestType != USB_RECIP_INTERFACE 1424 || !dev->config 1425 || wIndex > 1) 1426 break; 1427 if (!dev->cdc && wIndex != 0) 1428 break; 1429 spin_lock (&dev->lock); 1430 1431 /* PXA hardware partially handles SET_INTERFACE; 1432 * we need to kluge around that interference. 1433 */ 1434 if (gadget_is_pxa (gadget)) { 1435 value = eth_set_config (dev, DEV_CONFIG_VALUE, 1436 GFP_ATOMIC); 1437 goto done_set_intf; 1438 } 1439 1440#ifdef DEV_CONFIG_CDC 1441 switch (wIndex) { 1442 case 0: /* control/master intf */ 1443 if (wValue != 0) 1444 break; 1445 if (dev->status) { 1446 usb_ep_disable (dev->status_ep); 1447 usb_ep_enable (dev->status_ep, dev->status); 1448 } 1449 value = 0; 1450 break; 1451 case 1: /* data intf */ 1452 if (wValue > 1) 1453 break; 1454 usb_ep_disable (dev->in_ep); 1455 usb_ep_disable (dev->out_ep); 1456 1457 /* CDC requires the data transfers not be done from 1458 * the default interface setting ... also, setting 1459 * the non-default interface clears filters etc. 1460 */ 1461 if (wValue == 1) { 1462 usb_ep_enable (dev->in_ep, dev->in); 1463 usb_ep_enable (dev->out_ep, dev->out); 1464 dev->cdc_filter = DEFAULT_FILTER; 1465 netif_carrier_on (dev->net); 1466 if (dev->status) 1467 issue_start_status (dev); 1468 if (netif_running (dev->net)) { 1469 spin_unlock (&dev->lock); 1470 eth_start (dev, GFP_ATOMIC); 1471 spin_lock (&dev->lock); 1472 } 1473 } else { 1474 netif_stop_queue (dev->net); 1475 netif_carrier_off (dev->net); 1476 } 1477 value = 0; 1478 break; 1479 } 1480#else 1481 /* FIXME this is wrong, as is the assumption that 1482 * all non-PXA hardware talks real CDC ... 1483 */ 1484 dev_warn (&gadget->dev, "set_interface ignored!\n"); 1485#endif /* DEV_CONFIG_CDC */ 1486 1487done_set_intf: 1488 spin_unlock (&dev->lock); 1489 break; 1490 case USB_REQ_GET_INTERFACE: 1491 if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) 1492 || !dev->config 1493 || wIndex > 1) 1494 break; 1495 if (!(dev->cdc || dev->rndis) && wIndex != 0) 1496 break; 1497 1498 /* for CDC, iff carrier is on, data interface is active. */ 1499 if (dev->rndis || wIndex != 1) 1500 *(u8 *)req->buf = 0; 1501 else 1502 *(u8 *)req->buf = netif_carrier_ok (dev->net) ? 1 : 0; 1503 value = min (wLength, (u16) 1); 1504 break; 1505 1506#ifdef DEV_CONFIG_CDC 1507 case USB_CDC_SET_ETHERNET_PACKET_FILTER: 1508 /* see 6.2.30: no data, wIndex = interface, 1509 * wValue = packet filter bitmap 1510 */ 1511 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) 1512 || !dev->cdc 1513 || dev->rndis 1514 || wLength != 0 1515 || wIndex > 1) 1516 break; 1517 DEBUG (dev, "packet filter %02x\n", wValue); 1518 dev->cdc_filter = wValue; 1519 value = 0; 1520 break; 1521 1522 /* and potentially: 1523 * case USB_CDC_SET_ETHERNET_MULTICAST_FILTERS: 1524 * case USB_CDC_SET_ETHERNET_PM_PATTERN_FILTER: 1525 * case USB_CDC_GET_ETHERNET_PM_PATTERN_FILTER: 1526 * case USB_CDC_GET_ETHERNET_STATISTIC: 1527 */ 1528 1529#endif /* DEV_CONFIG_CDC */ 1530 1531#ifdef CONFIG_USB_ETH_RNDIS 1532 /* RNDIS uses the CDC command encapsulation mechanism to implement 1533 * an RPC scheme, with much getting/setting of attributes by OID. 1534 */ 1535 case USB_CDC_SEND_ENCAPSULATED_COMMAND: 1536 if (ctrl->bRequestType != (USB_TYPE_CLASS|USB_RECIP_INTERFACE) 1537 || !dev->rndis 1538 || wLength > USB_BUFSIZ 1539 || wValue 1540 || rndis_control_intf.bInterfaceNumber 1541 != wIndex) 1542 break; 1543 /* read the request, then process it */ 1544 value = wLength; 1545 req->complete = rndis_command_complete; 1546 /* later, rndis_control_ack () sends a notification */ 1547 break; 1548 1549 case USB_CDC_GET_ENCAPSULATED_RESPONSE: 1550 if ((USB_DIR_IN|USB_TYPE_CLASS|USB_RECIP_INTERFACE) 1551 == ctrl->bRequestType 1552 && dev->rndis 1553 // && wLength >= 0x0400 1554 && !wValue 1555 && rndis_control_intf.bInterfaceNumber 1556 == wIndex) { 1557 u8 *buf; 1558 1559 /* return the result */ 1560 buf = rndis_get_next_response (dev->rndis_config, 1561 &value); 1562 if (buf) { 1563 memcpy (req->buf, buf, value); 1564 req->complete = rndis_response_complete; 1565 rndis_free_response(dev->rndis_config, buf); 1566 } 1567 /* else stalls ... spec says to avoid that */ 1568 } 1569 break; 1570#endif /* RNDIS */ 1571 1572 default: 1573 VDEBUG (dev, 1574 "unknown control req%02x.%02x v%04x i%04x l%d\n", 1575 ctrl->bRequestType, ctrl->bRequest, 1576 wValue, wIndex, wLength); 1577 } 1578 1579 /* respond with data transfer before status phase? */ 1580 if (value >= 0) { 1581 req->length = value; 1582 req->zero = value < wLength 1583 && (value % gadget->ep0->maxpacket) == 0; 1584 value = usb_ep_queue (gadget->ep0, req, GFP_ATOMIC); 1585 if (value < 0) { 1586 DEBUG (dev, "ep_queue --> %d\n", value); 1587 req->status = 0; 1588 eth_setup_complete (gadget->ep0, req); 1589 } 1590 } 1591 1592 /* host either stalls (value < 0) or reports success */ 1593 return value; 1594} 1595 1596static void 1597eth_disconnect (struct usb_gadget *gadget) 1598{ 1599 struct eth_dev *dev = get_gadget_data (gadget); 1600 unsigned long flags; 1601 1602 spin_lock_irqsave (&dev->lock, flags); 1603 netif_stop_queue (dev->net); 1604 netif_carrier_off (dev->net); 1605 eth_reset_config (dev); 1606 spin_unlock_irqrestore (&dev->lock, flags); 1607 1608 /* FIXME RNDIS should enter RNDIS_UNINITIALIZED */ 1609 1610 /* next we may get setup() calls to enumerate new connections; 1611 * or an unbind() during shutdown (including removing module). 1612 */ 1613} 1614 1615/*-------------------------------------------------------------------------*/ 1616 1617/* NETWORK DRIVER HOOKUP (to the layer above this driver) */ 1618 1619static int eth_change_mtu (struct net_device *net, int new_mtu) 1620{ 1621 struct eth_dev *dev = netdev_priv(net); 1622 1623 // FIXME if rndis, don't change while link's live 1624 1625 if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN) 1626 return -ERANGE; 1627 /* no zero-length packet read wanted after mtu-sized packets */ 1628 if (((new_mtu + sizeof (struct ethhdr)) % dev->in_ep->maxpacket) == 0) 1629 return -EDOM; 1630 net->mtu = new_mtu; 1631 return 0; 1632} 1633 1634static struct net_device_stats *eth_get_stats (struct net_device *net) 1635{ 1636 return &((struct eth_dev *)netdev_priv(net))->stats; 1637} 1638 1639static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p) 1640{ 1641 struct eth_dev *dev = netdev_priv(net); 1642 strlcpy(p->driver, shortname, sizeof p->driver); 1643 strlcpy(p->version, DRIVER_VERSION, sizeof p->version); 1644 strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version); 1645 strlcpy (p->bus_info, dev->gadget->dev.bus_id, sizeof p->bus_info); 1646} 1647 1648static u32 eth_get_link(struct net_device *net) 1649{ 1650 struct eth_dev *dev = netdev_priv(net); 1651 return dev->gadget->speed != USB_SPEED_UNKNOWN; 1652} 1653 1654static struct ethtool_ops ops = { 1655 .get_drvinfo = eth_get_drvinfo, 1656 .get_link = eth_get_link 1657}; 1658 1659static void defer_kevent (struct eth_dev *dev, int flag) 1660{ 1661 if (test_and_set_bit (flag, &dev->todo)) 1662 return; 1663 if (!schedule_work (&dev->work)) 1664 ERROR (dev, "kevent %d may have been dropped\n", flag); 1665 else 1666 DEBUG (dev, "kevent %d scheduled\n", flag); 1667} 1668 1669static void rx_complete (struct usb_ep *ep, struct usb_request *req); 1670 1671static int 1672rx_submit (struct eth_dev *dev, struct usb_request *req, int gfp_flags) 1673{ 1674 struct sk_buff *skb; 1675 int retval = -ENOMEM; 1676 size_t size; 1677 1678 /* Padding up to RX_EXTRA handles minor disagreements with host. 1679 * Normally we use the USB "terminate on short read" convention; 1680 * so allow up to (N*maxpacket), since that memory is normally 1681 * already allocated. Some hardware doesn't deal well with short 1682 * reads (e.g. DMA must be N*maxpacket), so for now don't trim a 1683 * byte off the end (to force hardware errors on overflow). 1684 * 1685 * RNDIS uses internal framing, and explicitly allows senders to 1686 * pad to end-of-packet. That's potentially nice for speed, 1687 * but means receivers can't recover synch on their own. 1688 */ 1689 size = (sizeof (struct ethhdr) + dev->net->mtu + RX_EXTRA); 1690 size += dev->out_ep->maxpacket - 1; 1691#ifdef CONFIG_USB_ETH_RNDIS 1692 if (dev->rndis) 1693 size += sizeof (struct rndis_packet_msg_type); 1694#endif 1695 size -= size % dev->out_ep->maxpacket; 1696 1697 if ((skb = alloc_skb (size + NET_IP_ALIGN, gfp_flags)) == 0) { 1698 DEBUG (dev, "no rx skb\n"); 1699 goto enomem; 1700 } 1701 1702 /* Some platforms perform better when IP packets are aligned, 1703 * but on at least one, checksumming fails otherwise. Note: 1704 * RNDIS headers involve variable numbers of LE32 values. 1705 */ 1706 skb_reserve(skb, NET_IP_ALIGN); 1707 1708 req->buf = skb->data; 1709 req->length = size; 1710 req->complete = rx_complete; 1711 req->context = skb; 1712 1713 retval = usb_ep_queue (dev->out_ep, req, gfp_flags); 1714 if (retval == -ENOMEM) 1715enomem: 1716 defer_kevent (dev, WORK_RX_MEMORY); 1717 if (retval) { 1718 DEBUG (dev, "rx submit --> %d\n", retval); 1719 dev_kfree_skb_any (skb); 1720 spin_lock (&dev->lock); 1721 list_add (&req->list, &dev->rx_reqs); 1722 spin_unlock (&dev->lock); 1723 } 1724 return retval; 1725} 1726 1727static void rx_complete (struct usb_ep *ep, struct usb_request *req) 1728{ 1729 struct sk_buff *skb = req->context; 1730 struct eth_dev *dev = ep->driver_data; 1731 int status = req->status; 1732 1733 switch (status) { 1734 1735 /* normal completion */ 1736 case 0: 1737 skb_put (skb, req->actual); 1738#ifdef CONFIG_USB_ETH_RNDIS 1739 /* we know MaxPacketsPerTransfer == 1 here */ 1740 if (dev->rndis) 1741 status = rndis_rm_hdr (skb); 1742#endif 1743 if (status < 0 1744 || ETH_HLEN > skb->len 1745 || skb->len > ETH_FRAME_LEN) { 1746 dev->stats.rx_errors++; 1747 dev->stats.rx_length_errors++; 1748 DEBUG (dev, "rx length %d\n", skb->len); 1749 break; 1750 } 1751 1752 skb->dev = dev->net; 1753 skb->protocol = eth_type_trans (skb, dev->net); 1754 dev->stats.rx_packets++; 1755 dev->stats.rx_bytes += skb->len; 1756 1757 /* no buffer copies needed, unless hardware can't 1758 * use skb buffers. 1759 */ 1760 status = netif_rx (skb); 1761 skb = NULL; 1762 break; 1763 1764 /* software-driven interface shutdown */ 1765 case -ECONNRESET: // unlink 1766 case -ESHUTDOWN: // disconnect etc 1767 VDEBUG (dev, "rx shutdown, code %d\n", status); 1768 goto quiesce; 1769 1770 /* for hardware automagic (such as pxa) */ 1771 case -ECONNABORTED: // endpoint reset 1772 DEBUG (dev, "rx %s reset\n", ep->name); 1773 defer_kevent (dev, WORK_RX_MEMORY); 1774quiesce: 1775 dev_kfree_skb_any (skb); 1776 goto clean; 1777 1778 /* data overrun */ 1779 case -EOVERFLOW: 1780 dev->stats.rx_over_errors++; 1781 // FALLTHROUGH 1782 1783 default: 1784 dev->stats.rx_errors++; 1785 DEBUG (dev, "rx status %d\n", status); 1786 break; 1787 } 1788 1789 if (skb) 1790 dev_kfree_skb_any (skb); 1791 if (!netif_running (dev->net)) { 1792clean: 1793 /* nobody reading rx_reqs, so no dev->lock */ 1794 list_add (&req->list, &dev->rx_reqs); 1795 req = NULL; 1796 } 1797 if (req) 1798 rx_submit (dev, req, GFP_ATOMIC); 1799} 1800 1801static int prealloc (struct list_head *list, struct usb_ep *ep, 1802 unsigned n, int gfp_flags) 1803{ 1804 unsigned i; 1805 struct usb_request *req; 1806 1807 if (!n) 1808 return -ENOMEM; 1809 1810 /* queue/recycle up to N requests */ 1811 i = n; 1812 list_for_each_entry (req, list, list) { 1813 if (i-- == 0) 1814 goto extra; 1815 } 1816 while (i--) { 1817 req = usb_ep_alloc_request (ep, gfp_flags); 1818 if (!req) 1819 return list_empty (list) ? -ENOMEM : 0; 1820 list_add (&req->list, list); 1821 } 1822 return 0; 1823 1824extra: 1825 /* free extras */ 1826 for (;;) { 1827 struct list_head *next; 1828 1829 next = req->list.next; 1830 list_del (&req->list); 1831 usb_ep_free_request (ep, req); 1832 1833 if (next == list) 1834 break; 1835 1836 req = container_of (next, struct usb_request, list); 1837 } 1838 return 0; 1839} 1840 1841static int alloc_requests (struct eth_dev *dev, unsigned n, int gfp_flags) 1842{ 1843 int status; 1844 1845 status = prealloc (&dev->tx_reqs, dev->in_ep, n, gfp_flags); 1846 if (status < 0) 1847 goto fail; 1848 status = prealloc (&dev->rx_reqs, dev->out_ep, n, gfp_flags); 1849 if (status < 0) 1850 goto fail; 1851 return 0; 1852fail: 1853 DEBUG (dev, "can't alloc requests\n"); 1854 return status; 1855} 1856 1857static void rx_fill (struct eth_dev *dev, int gfp_flags) 1858{ 1859 struct usb_request *req; 1860 unsigned long flags; 1861 1862 clear_bit (WORK_RX_MEMORY, &dev->todo); 1863 1864 /* fill unused rxq slots with some skb */ 1865 spin_lock_irqsave (&dev->lock, flags); 1866 while (!list_empty (&dev->rx_reqs)) { 1867 req = container_of (dev->rx_reqs.next, 1868 struct usb_request, list); 1869 list_del_init (&req->list); 1870 spin_unlock_irqrestore (&dev->lock, flags); 1871 1872 if (rx_submit (dev, req, gfp_flags) < 0) { 1873 defer_kevent (dev, WORK_RX_MEMORY); 1874 return; 1875 } 1876 1877 spin_lock_irqsave (&dev->lock, flags); 1878 } 1879 spin_unlock_irqrestore (&dev->lock, flags); 1880} 1881 1882static void eth_work (void *_dev) 1883{ 1884 struct eth_dev *dev = _dev; 1885 1886 if (test_bit (WORK_RX_MEMORY, &dev->todo)) { 1887 if (netif_running (dev->net)) 1888 rx_fill (dev, GFP_KERNEL); 1889 else 1890 clear_bit (WORK_RX_MEMORY, &dev->todo); 1891 } 1892 1893 if (dev->todo) 1894 DEBUG (dev, "work done, flags = 0x%lx\n", dev->todo); 1895} 1896 1897static void tx_complete (struct usb_ep *ep, struct usb_request *req) 1898{ 1899 struct sk_buff *skb = req->context; 1900 struct eth_dev *dev = ep->driver_data; 1901 1902 switch (req->status) { 1903 default: 1904 dev->stats.tx_errors++; 1905 VDEBUG (dev, "tx err %d\n", req->status); 1906 /* FALLTHROUGH */ 1907 case -ECONNRESET: // unlink 1908 case -ESHUTDOWN: // disconnect etc 1909 break; 1910 case 0: 1911 dev->stats.tx_bytes += skb->len; 1912 } 1913 dev->stats.tx_packets++; 1914 1915 spin_lock (&dev->lock); 1916 list_add (&req->list, &dev->tx_reqs); 1917 spin_unlock (&dev->lock); 1918 dev_kfree_skb_any (skb); 1919 1920 atomic_dec (&dev->tx_qlen); 1921 if (netif_carrier_ok (dev->net)) 1922 netif_wake_queue (dev->net); 1923} 1924 1925static inline int eth_is_promisc (struct eth_dev *dev) 1926{ 1927 /* no filters for the CDC subset; always promisc */ 1928 if (subset_active (dev)) 1929 return 1; 1930 return dev->cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS; 1931} 1932 1933static int eth_start_xmit (struct sk_buff *skb, struct net_device *net) 1934{ 1935 struct eth_dev *dev = netdev_priv(net); 1936 int length = skb->len; 1937 int retval; 1938 struct usb_request *req = NULL; 1939 unsigned long flags; 1940 1941 /* apply outgoing CDC or RNDIS filters */ 1942 if (!eth_is_promisc (dev)) { 1943 u8 *dest = skb->data; 1944 1945 if (dest [0] & 0x01) { 1946 u16 type; 1947 1948 /* ignores USB_CDC_PACKET_TYPE_MULTICAST and host 1949 * SET_ETHERNET_MULTICAST_FILTERS requests 1950 */ 1951 if (memcmp (dest, net->broadcast, ETH_ALEN) == 0) 1952 type = USB_CDC_PACKET_TYPE_BROADCAST; 1953 else 1954 type = USB_CDC_PACKET_TYPE_ALL_MULTICAST; 1955 if (!(dev->cdc_filter & type)) { 1956 dev_kfree_skb_any (skb); 1957 return 0; 1958 } 1959 } 1960 /* ignores USB_CDC_PACKET_TYPE_DIRECTED */ 1961 } 1962 1963 spin_lock_irqsave (&dev->lock, flags); 1964 req = container_of (dev->tx_reqs.next, struct usb_request, list); 1965 list_del (&req->list); 1966 if (list_empty (&dev->tx_reqs)) 1967 netif_stop_queue (net); 1968 spin_unlock_irqrestore (&dev->lock, flags); 1969 1970 /* no buffer copies needed, unless the network stack did it 1971 * or the hardware can't use skb buffers. 1972 * or there's not enough space for any RNDIS headers we need 1973 */ 1974#ifdef CONFIG_USB_ETH_RNDIS 1975 if (dev->rndis) { 1976 struct sk_buff *skb_rndis; 1977 1978 skb_rndis = skb_realloc_headroom (skb, 1979 sizeof (struct rndis_packet_msg_type)); 1980 if (!skb_rndis) 1981 goto drop; 1982 1983 dev_kfree_skb_any (skb); 1984 skb = skb_rndis; 1985 rndis_add_hdr (skb); 1986 length = skb->len; 1987 } 1988#endif 1989 req->buf = skb->data; 1990 req->context = skb; 1991 req->complete = tx_complete; 1992 1993 /* use zlp framing on tx for strict CDC-Ether conformance, 1994 * though any robust network rx path ignores extra padding. 1995 * and some hardware doesn't like to write zlps. 1996 */ 1997 req->zero = 1; 1998 if (!dev->zlp && (length % dev->in_ep->maxpacket) == 0) 1999 length++; 2000 2001 req->length = length; 2002 2003#ifdef CONFIG_USB_GADGET_DUALSPEED 2004 /* throttle highspeed IRQ rate back slightly */ 2005 req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH) 2006 ? ((atomic_read (&dev->tx_qlen) % TX_DELAY) != 0) 2007 : 0; 2008#endif 2009 2010 retval = usb_ep_queue (dev->in_ep, req, GFP_ATOMIC); 2011 switch (retval) { 2012 default: 2013 DEBUG (dev, "tx queue err %d\n", retval); 2014 break; 2015 case 0: 2016 net->trans_start = jiffies; 2017 atomic_inc (&dev->tx_qlen); 2018 } 2019 2020 if (retval) { 2021#ifdef CONFIG_USB_ETH_RNDIS 2022drop: 2023#endif 2024 dev->stats.tx_dropped++; 2025 dev_kfree_skb_any (skb); 2026 spin_lock_irqsave (&dev->lock, flags); 2027 if (list_empty (&dev->tx_reqs)) 2028 netif_start_queue (net); 2029 list_add (&req->list, &dev->tx_reqs); 2030 spin_unlock_irqrestore (&dev->lock, flags); 2031 } 2032 return 0; 2033} 2034 2035/*-------------------------------------------------------------------------*/ 2036 2037#ifdef CONFIG_USB_ETH_RNDIS 2038 2039static void rndis_send_media_state (struct eth_dev *dev, int connect) 2040{ 2041 if (!dev) 2042 return; 2043 2044 if (connect) { 2045 if (rndis_signal_connect (dev->rndis_config)) 2046 return; 2047 } else { 2048 if (rndis_signal_disconnect (dev->rndis_config)) 2049 return; 2050 } 2051} 2052 2053static void 2054rndis_control_ack_complete (struct usb_ep *ep, struct usb_request *req) 2055{ 2056 if (req->status || req->actual != req->length) 2057 DEBUG ((struct eth_dev *) ep->driver_data, 2058 "rndis control ack complete --> %d, %d/%d\n", 2059 req->status, req->actual, req->length); 2060} 2061 2062static int rndis_control_ack (struct net_device *net) 2063{ 2064 struct eth_dev *dev = netdev_priv(net); 2065 u32 length; 2066 struct usb_request *resp = dev->stat_req; 2067 2068 /* in case RNDIS calls this after disconnect */ 2069 if (!dev->status) { 2070 DEBUG (dev, "status ENODEV\n"); 2071 return -ENODEV; 2072 } 2073 2074 /* Send RNDIS RESPONSE_AVAILABLE notification; 2075 * USB_CDC_NOTIFY_RESPONSE_AVAILABLE should work too 2076 */ 2077 resp->length = 8; 2078 resp->complete = rndis_control_ack_complete; 2079 2080 *((__le32 *) resp->buf) = __constant_cpu_to_le32 (1); 2081 *((__le32 *) resp->buf + 1) = __constant_cpu_to_le32 (0); 2082 2083 length = usb_ep_queue (dev->status_ep, resp, GFP_ATOMIC); 2084 if (length < 0) { 2085 resp->status = 0; 2086 rndis_control_ack_complete (dev->status_ep, resp); 2087 } 2088 2089 return 0; 2090} 2091 2092#endif /* RNDIS */ 2093 2094static void eth_start (struct eth_dev *dev, int gfp_flags) 2095{ 2096 DEBUG (dev, "%s\n", __FUNCTION__); 2097 2098 /* fill the rx queue */ 2099 rx_fill (dev, gfp_flags); 2100 2101 /* and open the tx floodgates */ 2102 atomic_set (&dev->tx_qlen, 0); 2103 netif_wake_queue (dev->net); 2104#ifdef CONFIG_USB_ETH_RNDIS 2105 if (dev->rndis) { 2106 rndis_set_param_medium (dev->rndis_config, 2107 NDIS_MEDIUM_802_3, 2108 BITRATE(dev->gadget)/100); 2109 rndis_send_media_state (dev, 1); 2110 } 2111#endif 2112} 2113 2114static int eth_open (struct net_device *net) 2115{ 2116 struct eth_dev *dev = netdev_priv(net); 2117 2118 DEBUG (dev, "%s\n", __FUNCTION__); 2119 if (netif_carrier_ok (dev->net)) 2120 eth_start (dev, GFP_KERNEL); 2121 return 0; 2122} 2123 2124static int eth_stop (struct net_device *net) 2125{ 2126 struct eth_dev *dev = netdev_priv(net); 2127 2128 VDEBUG (dev, "%s\n", __FUNCTION__); 2129 netif_stop_queue (net); 2130 2131 DEBUG (dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n", 2132 dev->stats.rx_packets, dev->stats.tx_packets, 2133 dev->stats.rx_errors, dev->stats.tx_errors 2134 ); 2135 2136 /* ensure there are no more active requests */ 2137 if (dev->config) { 2138 usb_ep_disable (dev->in_ep); 2139 usb_ep_disable (dev->out_ep); 2140 if (netif_carrier_ok (dev->net)) { 2141 DEBUG (dev, "host still using in/out endpoints\n"); 2142 // FIXME idiom may leave toggle wrong here 2143 usb_ep_enable (dev->in_ep, dev->in); 2144 usb_ep_enable (dev->out_ep, dev->out); 2145 } 2146 if (dev->status_ep) { 2147 usb_ep_disable (dev->status_ep); 2148 usb_ep_enable (dev->status_ep, dev->status); 2149 } 2150 } 2151 2152#ifdef CONFIG_USB_ETH_RNDIS 2153 if (dev->rndis) { 2154 rndis_set_param_medium (dev->rndis_config, 2155 NDIS_MEDIUM_802_3, 0); 2156 rndis_send_media_state (dev, 0); 2157 } 2158#endif 2159 2160 return 0; 2161} 2162 2163/*-------------------------------------------------------------------------*/ 2164 2165static struct usb_request *eth_req_alloc (struct usb_ep *ep, unsigned size) 2166{ 2167 struct usb_request *req; 2168 2169 req = usb_ep_alloc_request (ep, GFP_KERNEL); 2170 if (!req) 2171 return NULL; 2172 2173 req->buf = kmalloc (size, GFP_KERNEL); 2174 if (!req->buf) { 2175 usb_ep_free_request (ep, req); 2176 req = NULL; 2177 } 2178 return req; 2179} 2180 2181static void 2182eth_req_free (struct usb_ep *ep, struct usb_request *req) 2183{ 2184 kfree (req->buf); 2185 usb_ep_free_request (ep, req); 2186} 2187 2188 2189static void 2190eth_unbind (struct usb_gadget *gadget) 2191{ 2192 struct eth_dev *dev = get_gadget_data (gadget); 2193 2194 DEBUG (dev, "unbind\n"); 2195#ifdef CONFIG_USB_ETH_RNDIS 2196 rndis_deregister (dev->rndis_config); 2197 rndis_exit (); 2198#endif 2199 2200 /* we've already been disconnected ... no i/o is active */ 2201 if (dev->req) { 2202 eth_req_free (gadget->ep0, dev->req); 2203 dev->req = NULL; 2204 } 2205 if (dev->stat_req) { 2206 eth_req_free (dev->status_ep, dev->stat_req); 2207 dev->stat_req = NULL; 2208 } 2209 2210 unregister_netdev (dev->net); 2211 free_netdev(dev->net); 2212 2213 /* assuming we used keventd, it must quiesce too */ 2214 flush_scheduled_work (); 2215 set_gadget_data (gadget, NULL); 2216} 2217 2218static u8 __init nibble (unsigned char c) 2219{ 2220 if (likely (isdigit (c))) 2221 return c - '0'; 2222 c = toupper (c); 2223 if (likely (isxdigit (c))) 2224 return 10 + c - 'A'; 2225 return 0; 2226} 2227 2228static void __init get_ether_addr (const char *str, u8 *dev_addr) 2229{ 2230 if (str) { 2231 unsigned i; 2232 2233 for (i = 0; i < 6; i++) { 2234 unsigned char num; 2235 2236 if((*str == '.') || (*str == ':')) 2237 str++; 2238 num = nibble(*str++) << 4; 2239 num |= (nibble(*str++)); 2240 dev_addr [i] = num; 2241 } 2242 if (is_valid_ether_addr (dev_addr)) 2243 return; 2244 } 2245 random_ether_addr(dev_addr); 2246} 2247 2248static int __init 2249eth_bind (struct usb_gadget *gadget) 2250{ 2251 struct eth_dev *dev; 2252 struct net_device *net; 2253 u8 cdc = 1, zlp = 1, rndis = 1; 2254 struct usb_ep *in_ep, *out_ep, *status_ep = NULL; 2255 int status = -ENOMEM; 2256 2257 /* these flags are only ever cleared; compiler take note */ 2258#ifndef DEV_CONFIG_CDC 2259 cdc = 0; 2260#endif 2261#ifndef CONFIG_USB_ETH_RNDIS 2262 rndis = 0; 2263#endif 2264 2265 /* Because most host side USB stacks handle CDC Ethernet, that 2266 * standard protocol is _strongly_ preferred for interop purposes. 2267 * (By everyone except Microsoft.) 2268 */ 2269 if (gadget_is_net2280 (gadget)) { 2270 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0201); 2271 } else if (gadget_is_dummy (gadget)) { 2272 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0202); 2273 } else if (gadget_is_pxa (gadget)) { 2274 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0203); 2275 /* pxa doesn't support altsettings */ 2276 cdc = 0; 2277 } else if (gadget_is_sh(gadget)) { 2278 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0204); 2279 /* sh doesn't support multiple interfaces or configs */ 2280 cdc = 0; 2281 rndis = 0; 2282 } else if (gadget_is_sa1100 (gadget)) { 2283 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0205); 2284 /* hardware can't write zlps */ 2285 zlp = 0; 2286 /* sa1100 CAN do CDC, without status endpoint ... we use 2287 * non-CDC to be compatible with ARM Linux-2.4 "usb-eth". 2288 */ 2289 cdc = 0; 2290 } else if (gadget_is_goku (gadget)) { 2291 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0206); 2292 } else if (gadget_is_mq11xx (gadget)) { 2293 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0207); 2294 } else if (gadget_is_omap (gadget)) { 2295 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0208); 2296 } else if (gadget_is_lh7a40x(gadget)) { 2297 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0209); 2298 } else if (gadget_is_n9604(gadget)) { 2299 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0210); 2300 } else if (gadget_is_pxa27x(gadget)) { 2301 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0211); 2302 } else if (gadget_is_s3c2410(gadget)) { 2303 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0212); 2304 } else if (gadget_is_at91(gadget)) { 2305 device_desc.bcdDevice = __constant_cpu_to_le16 (0x0213); 2306 } else { 2307 /* can't assume CDC works. don't want to default to 2308 * anything less functional on CDC-capable hardware, 2309 * so we fail in this case. 2310 */ 2311 dev_err (&gadget->dev, 2312 "controller '%s' not recognized\n", 2313 gadget->name); 2314 return -ENODEV; 2315 } 2316 snprintf (manufacturer, sizeof manufacturer, "%s %s/%s", 2317 system_utsname.sysname, system_utsname.release, 2318 gadget->name); 2319 2320 /* If there's an RNDIS configuration, that's what Windows wants to 2321 * be using ... so use these product IDs here and in the "linux.inf" 2322 * needed to install MSFT drivers. Current Linux kernels will use 2323 * the second configuration if it's CDC Ethernet, and need some help 2324 * to choose the right configuration otherwise. 2325 */ 2326 if (rndis) { 2327 device_desc.idVendor = 2328 __constant_cpu_to_le16(RNDIS_VENDOR_NUM); 2329 device_desc.idProduct = 2330 __constant_cpu_to_le16(RNDIS_PRODUCT_NUM); 2331 snprintf (product_desc, sizeof product_desc, 2332 "RNDIS/%s", driver_desc); 2333 2334 /* CDC subset ... recognized by Linux since 2.4.10, but Windows 2335 * drivers aren't widely available. 2336 */ 2337 } else if (!cdc) { 2338 device_desc.bDeviceClass = USB_CLASS_VENDOR_SPEC; 2339 device_desc.idVendor = 2340 __constant_cpu_to_le16(SIMPLE_VENDOR_NUM); 2341 device_desc.idProduct = 2342 __constant_cpu_to_le16(SIMPLE_PRODUCT_NUM); 2343 } 2344 2345 /* support optional vendor/distro customization */ 2346 if (idVendor) { 2347 if (!idProduct) { 2348 dev_err (&gadget->dev, "idVendor needs idProduct!\n"); 2349 return -ENODEV; 2350 } 2351 device_desc.idVendor = cpu_to_le16(idVendor); 2352 device_desc.idProduct = cpu_to_le16(idProduct); 2353 if (bcdDevice) 2354 device_desc.bcdDevice = cpu_to_le16(bcdDevice); 2355 } 2356 if (iManufacturer) 2357 strlcpy (manufacturer, iManufacturer, sizeof manufacturer); 2358 if (iProduct) 2359 strlcpy (product_desc, iProduct, sizeof product_desc); 2360 2361 /* all we really need is bulk IN/OUT */ 2362 usb_ep_autoconfig_reset (gadget); 2363 in_ep = usb_ep_autoconfig (gadget, &fs_source_desc); 2364 if (!in_ep) { 2365autoconf_fail: 2366 dev_err (&gadget->dev, 2367 "can't autoconfigure on %s\n", 2368 gadget->name); 2369 return -ENODEV; 2370 } 2371 EP_IN_NAME = in_ep->name; 2372 in_ep->driver_data = in_ep; /* claim */ 2373 2374 out_ep = usb_ep_autoconfig (gadget, &fs_sink_desc); 2375 if (!out_ep) 2376 goto autoconf_fail; 2377 EP_OUT_NAME = out_ep->name; 2378 out_ep->driver_data = out_ep; /* claim */ 2379 2380#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 2381 /* CDC Ethernet control interface doesn't require a status endpoint. 2382 * Since some hosts expect one, try to allocate one anyway. 2383 */ 2384 if (cdc || rndis) { 2385 status_ep = usb_ep_autoconfig (gadget, &fs_status_desc); 2386 if (status_ep) { 2387 EP_STATUS_NAME = status_ep->name; 2388 status_ep->driver_data = status_ep; /* claim */ 2389 } else if (rndis) { 2390 dev_err (&gadget->dev, 2391 "can't run RNDIS on %s\n", 2392 gadget->name); 2393 return -ENODEV; 2394#ifdef DEV_CONFIG_CDC 2395 /* pxa25x only does CDC subset; often used with RNDIS */ 2396 } else if (cdc) { 2397 control_intf.bNumEndpoints = 0; 2398 /* FIXME remove endpoint from descriptor list */ 2399#endif 2400 } 2401 } 2402#endif 2403 2404 /* one config: cdc, else minimal subset */ 2405 if (!cdc) { 2406 eth_config.bNumInterfaces = 1; 2407 eth_config.iConfiguration = STRING_SUBSET; 2408 fs_subset_descriptors(); 2409 hs_subset_descriptors(); 2410 } 2411 2412 /* For now RNDIS is always a second config */ 2413 if (rndis) 2414 device_desc.bNumConfigurations = 2; 2415 2416#ifdef CONFIG_USB_GADGET_DUALSPEED 2417 if (rndis) 2418 dev_qualifier.bNumConfigurations = 2; 2419 else if (!cdc) 2420 dev_qualifier.bDeviceClass = USB_CLASS_VENDOR_SPEC; 2421 2422 /* assumes ep0 uses the same value for both speeds ... */ 2423 dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0; 2424 2425 /* and that all endpoints are dual-speed */ 2426 hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress; 2427 hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress; 2428#if defined(DEV_CONFIG_CDC) || defined(CONFIG_USB_ETH_RNDIS) 2429 if (EP_STATUS_NAME) 2430 hs_status_desc.bEndpointAddress = 2431 fs_status_desc.bEndpointAddress; 2432#endif 2433#endif /* DUALSPEED */ 2434 2435 device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; 2436 usb_gadget_set_selfpowered (gadget); 2437 2438 if (gadget->is_otg) { 2439 otg_descriptor.bmAttributes |= USB_OTG_HNP, 2440 eth_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP; 2441 eth_config.bMaxPower = 4; 2442#ifdef CONFIG_USB_ETH_RNDIS 2443 rndis_config.bmAttributes |= USB_CONFIG_ATT_WAKEUP; 2444 rndis_config.bMaxPower = 4; 2445#endif 2446 } 2447 2448 net = alloc_etherdev (sizeof *dev); 2449 if (!net) 2450 return status; 2451 dev = netdev_priv(net); 2452 spin_lock_init (&dev->lock); 2453 INIT_WORK (&dev->work, eth_work, dev); 2454 INIT_LIST_HEAD (&dev->tx_reqs); 2455 INIT_LIST_HEAD (&dev->rx_reqs); 2456 2457 /* network device setup */ 2458 dev->net = net; 2459 SET_MODULE_OWNER (net); 2460 strcpy (net->name, "usb%d"); 2461 dev->cdc = cdc; 2462 dev->zlp = zlp; 2463 2464 dev->in_ep = in_ep; 2465 dev->out_ep = out_ep; 2466 dev->status_ep = status_ep; 2467 2468 /* Module params for these addresses should come from ID proms. 2469 * The host side address is used with CDC and RNDIS, and commonly 2470 * ends up in a persistent config database. 2471 */ 2472 get_ether_addr(dev_addr, net->dev_addr); 2473 if (cdc || rndis) { 2474 get_ether_addr(host_addr, dev->host_mac); 2475#ifdef DEV_CONFIG_CDC 2476 snprintf (ethaddr, sizeof ethaddr, "%02X%02X%02X%02X%02X%02X", 2477 dev->host_mac [0], dev->host_mac [1], 2478 dev->host_mac [2], dev->host_mac [3], 2479 dev->host_mac [4], dev->host_mac [5]); 2480#endif 2481 } 2482 2483 if (rndis) { 2484 status = rndis_init(); 2485 if (status < 0) { 2486 dev_err (&gadget->dev, "can't init RNDIS, %d\n", 2487 status); 2488 goto fail; 2489 } 2490 } 2491 2492 net->change_mtu = eth_change_mtu; 2493 net->get_stats = eth_get_stats; 2494 net->hard_start_xmit = eth_start_xmit; 2495 net->open = eth_open; 2496 net->stop = eth_stop; 2497 // watchdog_timeo, tx_timeout ... 2498 // set_multicast_list 2499 SET_ETHTOOL_OPS(net, &ops); 2500 2501 /* preallocate control message data and buffer */ 2502 dev->req = eth_req_alloc (gadget->ep0, USB_BUFSIZ); 2503 if (!dev->req) 2504 goto fail; 2505 dev->req->complete = eth_setup_complete; 2506 2507 /* ... and maybe likewise for status transfer */ 2508 if (dev->status_ep) { 2509 dev->stat_req = eth_req_alloc (dev->status_ep, 2510 STATUS_BYTECOUNT); 2511 if (!dev->stat_req) { 2512 eth_req_free (gadget->ep0, dev->req); 2513 goto fail; 2514 } 2515 } 2516 2517 /* finish hookup to lower layer ... */ 2518 dev->gadget = gadget; 2519 set_gadget_data (gadget, dev); 2520 gadget->ep0->driver_data = dev; 2521 2522 /* two kinds of host-initiated state changes: 2523 * - iff DATA transfer is active, carrier is "on" 2524 * - tx queueing enabled if open *and* carrier is "on" 2525 */ 2526 netif_stop_queue (dev->net); 2527 netif_carrier_off (dev->net); 2528 2529 // SET_NETDEV_DEV (dev->net, &gadget->dev); 2530 status = register_netdev (dev->net); 2531 if (status < 0) 2532 goto fail1; 2533 2534 INFO (dev, "%s, version: " DRIVER_VERSION "\n", driver_desc); 2535 INFO (dev, "using %s, OUT %s IN %s%s%s\n", gadget->name, 2536 EP_OUT_NAME, EP_IN_NAME, 2537 EP_STATUS_NAME ? " STATUS " : "", 2538 EP_STATUS_NAME ? EP_STATUS_NAME : "" 2539 ); 2540 INFO (dev, "MAC %02x:%02x:%02x:%02x:%02x:%02x\n", 2541 net->dev_addr [0], net->dev_addr [1], 2542 net->dev_addr [2], net->dev_addr [3], 2543 net->dev_addr [4], net->dev_addr [5]); 2544 2545 if (cdc || rndis) 2546 INFO (dev, "HOST MAC %02x:%02x:%02x:%02x:%02x:%02x\n", 2547 dev->host_mac [0], dev->host_mac [1], 2548 dev->host_mac [2], dev->host_mac [3], 2549 dev->host_mac [4], dev->host_mac [5]); 2550 2551#ifdef CONFIG_USB_ETH_RNDIS 2552 if (rndis) { 2553 u32 vendorID = 0; 2554 2555 /* FIXME RNDIS vendor id == "vendor NIC code" == ? */ 2556 2557 dev->rndis_config = rndis_register (rndis_control_ack); 2558 if (dev->rndis_config < 0) { 2559fail0: 2560 unregister_netdev (dev->net); 2561 status = -ENODEV; 2562 goto fail; 2563 } 2564 2565 /* these set up a lot of the OIDs that RNDIS needs */ 2566 rndis_set_host_mac (dev->rndis_config, dev->host_mac); 2567 if (rndis_set_param_dev (dev->rndis_config, dev->net, 2568 &dev->stats)) 2569 goto fail0; 2570 if (rndis_set_param_vendor (dev->rndis_config, vendorID, 2571 manufacturer)) 2572 goto fail0; 2573 if (rndis_set_param_medium (dev->rndis_config, 2574 NDIS_MEDIUM_802_3, 2575 0)) 2576 goto fail0; 2577 INFO (dev, "RNDIS ready\n"); 2578 } 2579#endif 2580 2581 return status; 2582 2583fail1: 2584 dev_dbg(&gadget->dev, "register_netdev failed, %d\n", status); 2585fail: 2586 eth_unbind (gadget); 2587 return status; 2588} 2589 2590/*-------------------------------------------------------------------------*/ 2591 2592static void 2593eth_suspend (struct usb_gadget *gadget) 2594{ 2595 struct eth_dev *dev = get_gadget_data (gadget); 2596 2597 DEBUG (dev, "suspend\n"); 2598 dev->suspended = 1; 2599} 2600 2601static void 2602eth_resume (struct usb_gadget *gadget) 2603{ 2604 struct eth_dev *dev = get_gadget_data (gadget); 2605 2606 DEBUG (dev, "resume\n"); 2607 dev->suspended = 0; 2608} 2609 2610/*-------------------------------------------------------------------------*/ 2611 2612static struct usb_gadget_driver eth_driver = { 2613#ifdef CONFIG_USB_GADGET_DUALSPEED 2614 .speed = USB_SPEED_HIGH, 2615#else 2616 .speed = USB_SPEED_FULL, 2617#endif 2618 .function = (char *) driver_desc, 2619 .bind = eth_bind, 2620 .unbind = eth_unbind, 2621 2622 .setup = eth_setup, 2623 .disconnect = eth_disconnect, 2624 2625 .suspend = eth_suspend, 2626 .resume = eth_resume, 2627 2628 .driver = { 2629 .name = (char *) shortname, 2630 // .shutdown = ... 2631 // .suspend = ... 2632 // .resume = ... 2633 }, 2634}; 2635 2636MODULE_DESCRIPTION (DRIVER_DESC); 2637MODULE_AUTHOR ("David Brownell, Benedikt Spanger"); 2638MODULE_LICENSE ("GPL"); 2639 2640 2641static int __init init (void) 2642{ 2643 return usb_gadget_register_driver (ð_driver); 2644} 2645module_init (init); 2646 2647static void __exit cleanup (void) 2648{ 2649 usb_gadget_unregister_driver (ð_driver); 2650} 2651module_exit (cleanup); 2652 2653