drivers/usb/gadget/function/rndis.c

   1 /*
   2  * RNDIS MSG parser
   3  *
   4  * Authors:     Benedikt Spranger, Pengutronix
   5  *              Robert Schwebel, Pengutronix
   6  *
   7  *              This program is free software; you can redistribute it and/or
   8  *              modify it under the terms of the GNU General Public License
   9  *              version 2, as published by the Free Software Foundation.
  10  *
  11  *              This software was originally developed in conformance with
  12  *              Microsoft's Remote NDIS Specification License Agreement.
  13  *
  14  * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
  15  *              Fixed message length bug in init_response
  16  *
  17  * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
  18  *              Fixed rndis_rm_hdr length bug.
  19  *
  20  * Copyright (C) 2004 by David Brownell
  21  *              updates to merge with Linux 2.6, better match RNDIS spec
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/kernel.h>
  27 #include <linux/errno.h>
  28 #include <linux/idr.h>
  29 #include <linux/list.h>
  30 #include <linux/proc_fs.h>
  31 #include <linux/slab.h>
  32 #include <linux/seq_file.h>
  33 #include <linux/netdevice.h>
  34
  35 #include <asm/io.h>
  36 #include <asm/byteorder.h>
  37 #include <asm/unaligned.h>
  38
  39 #include "u_rndis.h"
  40
  41 #undef  VERBOSE_DEBUG
  42
  43 #include "rndis.h"
  44
  45 int rndis_ul_max_pkt_per_xfer_rcvd;
  46 module_param(rndis_ul_max_pkt_per_xfer_rcvd, int, S_IRUGO);
  47 MODULE_PARM_DESC(rndis_ul_max_pkt_per_xfer_rcvd,
  48                 "Max num of REMOTE_NDIS_PACKET_MSGs received in a single transfer");
  49
  50 int rndis_ul_max_xfer_size_rcvd;
  51 module_param(rndis_ul_max_xfer_size_rcvd, int, S_IRUGO);
  52 MODULE_PARM_DESC(rndis_ul_max_xfer_size_rcvd,
  53                 "Max size of bus transfer received");
  54
  55
  56 /* The driver for your USB chip needs to support ep0 OUT to work with
  57  * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
  58  *
  59  * Windows hosts need an INF file like Documentation/usb/linux.inf
  60  * and will be happier if you provide the host_addr module parameter.
  61  */
  62
  63 #if 0
  64 static int rndis_debug = 0;
  65 module_param (rndis_debug, int, 0);
  66 MODULE_PARM_DESC (rndis_debug, "enable debugging");
  67 #else
  68 #define rndis_debug             0
  69 #endif
  70
  71 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
  72
  73 #define NAME_TEMPLATE "driver/rndis-%03d"
  74
  75 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
  76
  77 static DEFINE_IDA(rndis_ida);
  78
  79 /* Driver Version */
  80 static const __le32 rndis_driver_version = cpu_to_le32(1);
  81
  82 /* Function Prototypes */
  83 static rndis_resp_t *rndis_add_response(struct rndis_params *params,
  84                                         u32 length);
  85
  86 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
  87
  88 static const struct file_operations rndis_proc_fops;
  89
  90 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
  91
  92 /* supported OIDs */
  93 static const u32 oid_supported_list[] =
  94 {
  95         /* the general stuff */
  96         RNDIS_OID_GEN_SUPPORTED_LIST,
  97         RNDIS_OID_GEN_HARDWARE_STATUS,
  98         RNDIS_OID_GEN_MEDIA_SUPPORTED,
  99         RNDIS_OID_GEN_MEDIA_IN_USE,
 100         RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
 101         RNDIS_OID_GEN_LINK_SPEED,
 102         RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
 103         RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
 104         RNDIS_OID_GEN_VENDOR_ID,
 105         RNDIS_OID_GEN_VENDOR_DESCRIPTION,
 106         RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
 107         RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
 108         RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
 109         RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
 110         RNDIS_OID_GEN_PHYSICAL_MEDIUM,
 111
 112         /* the statistical stuff */
 113         RNDIS_OID_GEN_XMIT_OK,
 114         RNDIS_OID_GEN_RCV_OK,
 115         RNDIS_OID_GEN_XMIT_ERROR,
 116         RNDIS_OID_GEN_RCV_ERROR,
 117         RNDIS_OID_GEN_RCV_NO_BUFFER,
 118 #ifdef  RNDIS_OPTIONAL_STATS
 119         RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
 120         RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
 121         RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
 122         RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
 123         RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
 124         RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
 125         RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
 126         RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
 127         RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
 128         RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
 129         RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
 130         RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
 131         RNDIS_OID_GEN_RCV_CRC_ERROR,
 132         RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
 133 #endif  /* RNDIS_OPTIONAL_STATS */
 134
 135         /* mandatory 802.3 */
 136         /* the general stuff */
 137         RNDIS_OID_802_3_PERMANENT_ADDRESS,
 138         RNDIS_OID_802_3_CURRENT_ADDRESS,
 139         RNDIS_OID_802_3_MULTICAST_LIST,
 140         RNDIS_OID_802_3_MAC_OPTIONS,
 141         RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
 142
 143         /* the statistical stuff */
 144         RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
 145         RNDIS_OID_802_3_XMIT_ONE_COLLISION,
 146         RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
 147 #ifdef  RNDIS_OPTIONAL_STATS
 148         RNDIS_OID_802_3_XMIT_DEFERRED,
 149         RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
 150         RNDIS_OID_802_3_RCV_OVERRUN,
 151         RNDIS_OID_802_3_XMIT_UNDERRUN,
 152         RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
 153         RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
 154         RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
 155 #endif  /* RNDIS_OPTIONAL_STATS */
 156
 157 #ifdef  RNDIS_PM
 158         /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
 159          * don't say what they mean ... and the NDIS specs are often
 160          * confusing and/or ambiguous in this context.  (That is, more
 161          * so than their specs for the other OIDs.)
 162          *
 163          * FIXME someone who knows what these should do, please
 164          * implement them!
 165          */
 166
 167         /* power management */
 168         OID_PNP_CAPABILITIES,
 169         OID_PNP_QUERY_POWER,
 170         OID_PNP_SET_POWER,
 171
 172 #ifdef  RNDIS_WAKEUP
 173         /* wake up host */
 174         OID_PNP_ENABLE_WAKE_UP,
 175         OID_PNP_ADD_WAKE_UP_PATTERN,
 176         OID_PNP_REMOVE_WAKE_UP_PATTERN,
 177 #endif  /* RNDIS_WAKEUP */
 178 #endif  /* RNDIS_PM */
 179 };
 180
 181
 182 /* NDIS Functions */
 183 static int gen_ndis_query_resp(struct rndis_params *params, u32 OID, u8 *buf,
 184                                unsigned buf_len, rndis_resp_t *r)
 185 {
 186         int retval = -ENOTSUPP;
 187         u32 length = 4; /* usually */
 188         __le32 *outbuf;
 189         int i, count;
 190         rndis_query_cmplt_type *resp;
 191         struct net_device *net;
 192         struct rtnl_link_stats64 temp;
 193         const struct rtnl_link_stats64 *stats;
 194
 195         if (!r) return -ENOMEM;
 196         resp = (rndis_query_cmplt_type *)r->buf;
 197
 198         if (!resp) return -ENOMEM;
 199
 200         if (buf_len && rndis_debug > 1) {
 201                 pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
 202                 for (i = 0; i < buf_len; i += 16) {
 203                         pr_debug("%03d: %08x %08x %08x %08x\n", i,
 204                                 get_unaligned_le32(&buf[i]),
 205                                 get_unaligned_le32(&buf[i + 4]),
 206                                 get_unaligned_le32(&buf[i + 8]),
 207                                 get_unaligned_le32(&buf[i + 12]));
 208                 }
 209         }
 210
 211         /* response goes here, right after the header */
 212         outbuf = (__le32 *)&resp[1];
 213         resp->InformationBufferOffset = cpu_to_le32(16);
 214
 215         net = params->dev;
 216         stats = dev_get_stats(net, &temp);
 217
 218         switch (OID) {
 219
 220         /* general oids (table 4-1) */
 221
 222         /* mandatory */
 223         case RNDIS_OID_GEN_SUPPORTED_LIST:
 224                 pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
 225                 length = sizeof(oid_supported_list);
 226                 count  = length / sizeof(u32);
 227                 for (i = 0; i < count; i++)
 228                         outbuf[i] = cpu_to_le32(oid_supported_list[i]);
 229                 retval = 0;
 230                 break;
 231
 232         /* mandatory */
 233         case RNDIS_OID_GEN_HARDWARE_STATUS:
 234                 pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
 235                 /* Bogus question!
 236                  * Hardware must be ready to receive high level protocols.
 237                  * BTW:
 238                  * reddite ergo quae sunt Caesaris Caesari
 239                  * et quae sunt Dei Deo!
 240                  */
 241                 *outbuf = cpu_to_le32(0);
 242                 retval = 0;
 243                 break;
 244
 245         /* mandatory */
 246         case RNDIS_OID_GEN_MEDIA_SUPPORTED:
 247                 pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
 248                 *outbuf = cpu_to_le32(params->medium);
 249                 retval = 0;
 250                 break;
 251
 252         /* mandatory */
 253         case RNDIS_OID_GEN_MEDIA_IN_USE:
 254                 pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
 255                 /* one medium, one transport... (maybe you do it better) */
 256                 *outbuf = cpu_to_le32(params->medium);
 257                 retval = 0;
 258                 break;
 259
 260         /* mandatory */
 261         case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
 262                 pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
 263                 if (params->dev) {
 264                         *outbuf = cpu_to_le32(params->dev->mtu);
 265                         retval = 0;
 266                 }
 267                 break;
 268
 269         /* mandatory */
 270         case RNDIS_OID_GEN_LINK_SPEED:
 271                 if (rndis_debug > 1)
 272                         pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
 273                 if (params->media_state == RNDIS_MEDIA_STATE_DISCONNECTED)
 274                         *outbuf = cpu_to_le32(0);
 275                 else
 276                         *outbuf = cpu_to_le32(params->speed);
 277                 retval = 0;
 278                 break;
 279
 280         /* mandatory */
 281         case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
 282                 pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
 283                 if (params->dev) {
 284                         *outbuf = cpu_to_le32(params->dev->mtu);
 285                         retval = 0;
 286                 }
 287                 break;
 288
 289         /* mandatory */
 290         case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
 291                 pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
 292                 if (params->dev) {
 293                         *outbuf = cpu_to_le32(params->dev->mtu);
 294                         retval = 0;
 295                 }
 296                 break;
 297
 298         /* mandatory */
 299         case RNDIS_OID_GEN_VENDOR_ID:
 300                 pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
 301                 *outbuf = cpu_to_le32(params->vendorID);
 302                 retval = 0;
 303                 break;
 304
 305         /* mandatory */
 306         case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
 307                 pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
 308                 if (params->vendorDescr) {
 309                         length = strlen(params->vendorDescr);
 310                         memcpy(outbuf, params->vendorDescr, length);
 311                 } else {
 312                         outbuf[0] = 0;
 313                 }
 314                 retval = 0;
 315                 break;
 316
 317         case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
 318                 pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
 319                 /* Created as LE */
 320                 *outbuf = rndis_driver_version;
 321                 retval = 0;
 322                 break;
 323
 324         /* mandatory */
 325         case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
 326                 pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
 327                 *outbuf = cpu_to_le32(*params->filter);
 328                 retval = 0;
 329                 break;
 330
 331         /* mandatory */
 332         case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
 333                 pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
 334                 *outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
 335                 retval = 0;
 336                 break;
 337
 338         /* mandatory */
 339         case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
 340                 if (rndis_debug > 1)
 341                         pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
 342                 *outbuf = cpu_to_le32(params->media_state);
 343                 retval = 0;
 344                 break;
 345
 346         case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
 347                 pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
 348                 *outbuf = cpu_to_le32(0);
 349                 retval = 0;
 350                 break;
 351
 352         /* The RNDIS specification is incomplete/wrong.   Some versions
 353          * of MS-Windows expect OIDs that aren't specified there.  Other
 354          * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
 355          */
 356         case RNDIS_OID_GEN_MAC_OPTIONS:         /* from WinME */
 357                 pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
 358                 *outbuf = cpu_to_le32(
 359                           RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
 360                         | RNDIS_MAC_OPTION_FULL_DUPLEX);
 361                 retval = 0;
 362                 break;
 363
 364         /* statistics OIDs (table 4-2) */
 365
 366         /* mandatory */
 367         case RNDIS_OID_GEN_XMIT_OK:
 368                 if (rndis_debug > 1)
 369                         pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__);
 370                 if (stats) {
 371                         *outbuf = cpu_to_le32(stats->tx_packets
 372                                 - stats->tx_errors - stats->tx_dropped);
 373                         retval = 0;
 374                 }
 375                 break;
 376
 377         /* mandatory */
 378         case RNDIS_OID_GEN_RCV_OK:
 379                 if (rndis_debug > 1)
 380                         pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__);
 381                 if (stats) {
 382                         *outbuf = cpu_to_le32(stats->rx_packets
 383                                 - stats->rx_errors - stats->rx_dropped);
 384                         retval = 0;
 385                 }
 386                 break;
 387
 388         /* mandatory */
 389         case RNDIS_OID_GEN_XMIT_ERROR:
 390                 if (rndis_debug > 1)
 391                         pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
 392                 if (stats) {
 393                         *outbuf = cpu_to_le32(stats->tx_errors);
 394                         retval = 0;
 395                 }
 396                 break;
 397
 398         /* mandatory */
 399         case RNDIS_OID_GEN_RCV_ERROR:
 400                 if (rndis_debug > 1)
 401                         pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
 402                 if (stats) {
 403                         *outbuf = cpu_to_le32(stats->rx_errors);
 404                         retval = 0;
 405                 }
 406                 break;
 407
 408         /* mandatory */
 409         case RNDIS_OID_GEN_RCV_NO_BUFFER:
 410                 pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__);
 411                 if (stats) {
 412                         *outbuf = cpu_to_le32(stats->rx_dropped);
 413                         retval = 0;
 414                 }
 415                 break;
 416
 417         /* ieee802.3 OIDs (table 4-3) */
 418
 419         /* mandatory */
 420         case RNDIS_OID_802_3_PERMANENT_ADDRESS:
 421                 pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
 422                 if (params->dev) {
 423                         length = ETH_ALEN;
 424                         memcpy(outbuf, params->host_mac, length);
 425                         retval = 0;
 426                 }
 427                 break;
 428
 429         /* mandatory */
 430         case RNDIS_OID_802_3_CURRENT_ADDRESS:
 431                 pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
 432                 if (params->dev) {
 433                         length = ETH_ALEN;
 434                         memcpy(outbuf, params->host_mac, length);
 435                         retval = 0;
 436                 }
 437                 break;
 438
 439         /* mandatory */
 440         case RNDIS_OID_802_3_MULTICAST_LIST:
 441                 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
 442                 /* Multicast base address only */
 443                 *outbuf = cpu_to_le32(0xE0000000);
 444                 retval = 0;
 445                 break;
 446
 447         /* mandatory */
 448         case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
 449                 pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
 450                 /* Multicast base address only */
 451                 *outbuf = cpu_to_le32(1);
 452                 retval = 0;
 453                 break;
 454
 455         case RNDIS_OID_802_3_MAC_OPTIONS:
 456                 pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
 457                 *outbuf = cpu_to_le32(0);
 458                 retval = 0;
 459                 break;
 460
 461         /* ieee802.3 statistics OIDs (table 4-4) */
 462
 463         /* mandatory */
 464         case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
 465                 pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
 466                 if (stats) {
 467                         *outbuf = cpu_to_le32(stats->rx_frame_errors);
 468                         retval = 0;
 469                 }
 470                 break;
 471
 472         /* mandatory */
 473         case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
 474                 pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
 475                 *outbuf = cpu_to_le32(0);
 476                 retval = 0;
 477                 break;
 478
 479         /* mandatory */
 480         case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
 481                 pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
 482                 *outbuf = cpu_to_le32(0);
 483                 retval = 0;
 484                 break;
 485
 486         default:
 487                 pr_warning("%s: query unknown OID 0x%08X\n",
 488                          __func__, OID);
 489         }
 490         if (retval < 0)
 491                 length = 0;
 492
 493         resp->InformationBufferLength = cpu_to_le32(length);
 494         r->length = length + sizeof(*resp);
 495         resp->MessageLength = cpu_to_le32(r->length);
 496         return retval;
 497 }
 498
 499 static int gen_ndis_set_resp(struct rndis_params *params, u32 OID,
 500                              u8 *buf, u32 buf_len, rndis_resp_t *r)
 501 {
 502         rndis_set_cmplt_type *resp;
 503         int i, retval = -ENOTSUPP;
 504
 505         if (!r)
 506                 return -ENOMEM;
 507         resp = (rndis_set_cmplt_type *)r->buf;
 508         if (!resp)
 509                 return -ENOMEM;
 510
 511         if (buf_len && rndis_debug > 1) {
 512                 pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
 513                 for (i = 0; i < buf_len; i += 16) {
 514                         pr_debug("%03d: %08x %08x %08x %08x\n", i,
 515                                 get_unaligned_le32(&buf[i]),
 516                                 get_unaligned_le32(&buf[i + 4]),
 517                                 get_unaligned_le32(&buf[i + 8]),
 518                                 get_unaligned_le32(&buf[i + 12]));
 519                 }
 520         }
 521
 522         switch (OID) {
 523         case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
 524
 525                 /* these NDIS_PACKET_TYPE_* bitflags are shared with
 526                  * cdc_filter; it's not RNDIS-specific
 527                  * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
 528                  *      PROMISCUOUS, DIRECTED,
 529                  *      MULTICAST, ALL_MULTICAST, BROADCAST
 530                  */
 531                 *params->filter = (u16)get_unaligned_le32(buf);
 532                 pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
 533                         __func__, *params->filter);
 534
 535                 /* this call has a significant side effect:  it's
 536                  * what makes the packet flow start and stop, like
 537                  * activating the CDC Ethernet altsetting.
 538                  */
 539                 retval = 0;
 540                 if (*params->filter) {
 541                         params->state = RNDIS_DATA_INITIALIZED;
 542                         netif_carrier_on(params->dev);
 543                         if (netif_running(params->dev))
 544                                 netif_wake_queue(params->dev);
 545                 } else {
 546                         params->state = RNDIS_INITIALIZED;
 547                         netif_carrier_off(params->dev);
 548                         netif_stop_queue(params->dev);
 549                 }
 550                 break;
 551
 552         case RNDIS_OID_802_3_MULTICAST_LIST:
 553                 /* I think we can ignore this */
 554                 pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
 555                 retval = 0;
 556                 break;
 557
 558         default:
 559                 pr_warning("%s: set unknown OID 0x%08X, size %d\n",
 560                          __func__, OID, buf_len);
 561         }
 562
 563         return retval;
 564 }
 565
 566 /*
 567  * Response Functions
 568  */
 569
 570 static int rndis_init_response(struct rndis_params *params,
 571                                rndis_init_msg_type *buf)
 572 {
 573         rndis_init_cmplt_type *resp;
 574         rndis_resp_t *r;
 575
 576         if (!params->dev)
 577                 return -ENOTSUPP;
 578
 579         r = rndis_add_response(params, sizeof(rndis_init_cmplt_type));
 580         if (!r)
 581                 return -ENOMEM;
 582         resp = (rndis_init_cmplt_type *)r->buf;
 583
 584         resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
 585         resp->MessageLength = cpu_to_le32(52);
 586         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 587         resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
 588         resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
 589         resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
 590         resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
 591         resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
 592         resp->MaxPacketsPerTransfer = cpu_to_le32(params->max_pkt_per_xfer);
 593         resp->MaxTransferSize = cpu_to_le32(params->max_pkt_per_xfer *
 594                 (params->dev->mtu
 595                 + sizeof(struct ethhdr)
 596                 + sizeof(struct rndis_packet_msg_type)
 597                 + 22));
 598         resp->PacketAlignmentFactor = cpu_to_le32(0);
 599         resp->AFListOffset = cpu_to_le32(0);
 600         resp->AFListSize = cpu_to_le32(0);
 601
 602         params->resp_avail(params->v);
 603         return 0;
 604 }
 605
 606 static int rndis_query_response(struct rndis_params *params,
 607                                 rndis_query_msg_type *buf)
 608 {
 609         rndis_query_cmplt_type *resp;
 610         rndis_resp_t *r;
 611
 612         /* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
 613         if (!params->dev)
 614                 return -ENOTSUPP;
 615
 616         /*
 617          * we need more memory:
 618          * gen_ndis_query_resp expects enough space for
 619          * rndis_query_cmplt_type followed by data.
 620          * oid_supported_list is the largest data reply
 621          */
 622         r = rndis_add_response(params,
 623                 sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
 624         if (!r)
 625                 return -ENOMEM;
 626         resp = (rndis_query_cmplt_type *)r->buf;
 627
 628         resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
 629         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 630
 631         if (gen_ndis_query_resp(params, le32_to_cpu(buf->OID),
 632                         le32_to_cpu(buf->InformationBufferOffset)
 633                                         + 8 + (u8 *)buf,
 634                         le32_to_cpu(buf->InformationBufferLength),
 635                         r)) {
 636                 /* OID not supported */
 637                 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
 638                 resp->MessageLength = cpu_to_le32(sizeof *resp);
 639                 resp->InformationBufferLength = cpu_to_le32(0);
 640                 resp->InformationBufferOffset = cpu_to_le32(0);
 641         } else
 642                 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
 643
 644         params->resp_avail(params->v);
 645         return 0;
 646 }
 647
 648 static int rndis_set_response(struct rndis_params *params,
 649                               rndis_set_msg_type *buf)
 650 {
 651         u32 BufLength, BufOffset;
 652         rndis_set_cmplt_type *resp;
 653         rndis_resp_t *r;
 654
 655         r = rndis_add_response(params, sizeof(rndis_set_cmplt_type));
 656         if (!r)
 657                 return -ENOMEM;
 658         resp = (rndis_set_cmplt_type *)r->buf;
 659
 660         BufLength = le32_to_cpu(buf->InformationBufferLength);
 661         BufOffset = le32_to_cpu(buf->InformationBufferOffset);
 662
 663 #ifdef  VERBOSE_DEBUG
 664         pr_debug("%s: Length: %d\n", __func__, BufLength);
 665         pr_debug("%s: Offset: %d\n", __func__, BufOffset);
 666         pr_debug("%s: InfoBuffer: ", __func__);
 667
 668         for (i = 0; i < BufLength; i++) {
 669                 pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
 670         }
 671
 672         pr_debug("\n");
 673 #endif
 674
 675         resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
 676         resp->MessageLength = cpu_to_le32(16);
 677         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 678         if (gen_ndis_set_resp(params, le32_to_cpu(buf->OID),
 679                         ((u8 *)buf) + 8 + BufOffset, BufLength, r))
 680                 resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
 681         else
 682                 resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
 683
 684         params->resp_avail(params->v);
 685         return 0;
 686 }
 687
 688 static int rndis_reset_response(struct rndis_params *params,
 689                                 rndis_reset_msg_type *buf)
 690 {
 691         rndis_reset_cmplt_type *resp;
 692         rndis_resp_t *r;
 693
 694         u32 length;
 695         u8 *xbuf;
 696
 697         /* drain the response queue */
 698         while ((xbuf = rndis_get_next_response(params, &length)))
 699                 rndis_free_response(params, xbuf);
 700
 701         r = rndis_add_response(params, sizeof(rndis_reset_cmplt_type));
 702         if (!r)
 703                 return -ENOMEM;
 704         resp = (rndis_reset_cmplt_type *)r->buf;
 705
 706         resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
 707         resp->MessageLength = cpu_to_le32(16);
 708         resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
 709         /* resent information */
 710         resp->AddressingReset = cpu_to_le32(1);
 711
 712         params->resp_avail(params->v);
 713         return 0;
 714 }
 715
 716 static int rndis_keepalive_response(struct rndis_params *params,
 717                                     rndis_keepalive_msg_type *buf)
 718 {
 719         rndis_keepalive_cmplt_type *resp;
 720         rndis_resp_t *r;
 721
 722         /* host "should" check only in RNDIS_DATA_INITIALIZED state */
 723
 724         r = rndis_add_response(params, sizeof(rndis_keepalive_cmplt_type));
 725         if (!r)
 726                 return -ENOMEM;
 727         resp = (rndis_keepalive_cmplt_type *)r->buf;
 728
 729         resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
 730         resp->MessageLength = cpu_to_le32(16);
 731         resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
 732         resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
 733
 734         params->resp_avail(params->v);
 735         return 0;
 736 }
 737
 738
 739 /*
 740  * Device to Host Comunication
 741  */
 742 static int rndis_indicate_status_msg(struct rndis_params *params, u32 status)
 743 {
 744         rndis_indicate_status_msg_type *resp;
 745         rndis_resp_t *r;
 746
 747         if (params->state == RNDIS_UNINITIALIZED)
 748                 return -ENOTSUPP;
 749
 750         r = rndis_add_response(params, sizeof(rndis_indicate_status_msg_type));
 751         if (!r)
 752                 return -ENOMEM;
 753         resp = (rndis_indicate_status_msg_type *)r->buf;
 754
 755         resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
 756         resp->MessageLength = cpu_to_le32(20);
 757         resp->Status = cpu_to_le32(status);
 758         resp->StatusBufferLength = cpu_to_le32(0);
 759         resp->StatusBufferOffset = cpu_to_le32(0);
 760
 761         params->resp_avail(params->v);
 762         return 0;
 763 }
 764
 765 int rndis_signal_connect(struct rndis_params *params)
 766 {
 767         params->media_state = RNDIS_MEDIA_STATE_CONNECTED;
 768         return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_CONNECT);
 769 }
 770 EXPORT_SYMBOL_GPL(rndis_signal_connect);
 771
 772 int rndis_signal_disconnect(struct rndis_params *params)
 773 {
 774         params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
 775         return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_DISCONNECT);
 776 }
 777 EXPORT_SYMBOL_GPL(rndis_signal_disconnect);
 778
 779 void rndis_uninit(struct rndis_params *params)
 780 {
 781         u8 *buf;
 782         u32 length;
 783
 784         if (!params)
 785                 return;
 786         params->state = RNDIS_UNINITIALIZED;
 787
 788         /* drain the response queue */
 789         while ((buf = rndis_get_next_response(params, &length)))
 790                 rndis_free_response(params, buf);
 791 }
 792 EXPORT_SYMBOL_GPL(rndis_uninit);
 793
 794 void rndis_set_host_mac(struct rndis_params *params, const u8 *addr)
 795 {
 796         params->host_mac = addr;
 797 }
 798 EXPORT_SYMBOL_GPL(rndis_set_host_mac);
 799
 800 /*
 801  * Message Parser
 802  */
 803 int rndis_msg_parser(struct rndis_params *params, u8 *buf)
 804 {
 805         u32 MsgType, MsgLength;
 806         __le32 *tmp;
 807
 808         if (!buf)
 809                 return -ENOMEM;
 810
 811         tmp = (__le32 *)buf;
 812         MsgType   = get_unaligned_le32(tmp++);
 813         MsgLength = get_unaligned_le32(tmp++);
 814
 815         if (!params)
 816                 return -ENOTSUPP;
 817
 818         /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
 819          * rx/tx statistics and link status, in addition to KEEPALIVE traffic
 820          * and normal HC level polling to see if there's any IN traffic.
 821          */
 822
 823         /* For USB: responses may take up to 10 seconds */
 824         switch (MsgType) {
 825         case RNDIS_MSG_INIT:
 826                 pr_debug("%s: RNDIS_MSG_INIT\n",
 827                         __func__);
 828                 params->state = RNDIS_INITIALIZED;
 829                 return rndis_init_response(params, (rndis_init_msg_type *)buf);
 830
 831         case RNDIS_MSG_HALT:
 832                 pr_debug("%s: RNDIS_MSG_HALT\n",
 833                         __func__);
 834                 params->state = RNDIS_UNINITIALIZED;
 835                 if (params->dev) {
 836                         netif_carrier_off(params->dev);
 837                         netif_stop_queue(params->dev);
 838                 }
 839                 return 0;
 840
 841         case RNDIS_MSG_QUERY:
 842                 return rndis_query_response(params,
 843                                         (rndis_query_msg_type *)buf);
 844
 845         case RNDIS_MSG_SET:
 846                 return rndis_set_response(params, (rndis_set_msg_type *)buf);
 847
 848         case RNDIS_MSG_RESET:
 849                 pr_debug("%s: RNDIS_MSG_RESET\n",
 850                         __func__);
 851                 return rndis_reset_response(params,
 852                                         (rndis_reset_msg_type *)buf);
 853
 854         case RNDIS_MSG_KEEPALIVE:
 855                 /* For USB: host does this every 5 seconds */
 856                 if (rndis_debug > 1)
 857                         pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
 858                                 __func__);
 859                 return rndis_keepalive_response(params,
 860                                                  (rndis_keepalive_msg_type *)
 861                                                  buf);
 862
 863         default:
 864                 /* At least Windows XP emits some undefined RNDIS messages.
 865                  * In one case those messages seemed to relate to the host
 866                  * suspending itself.
 867                  */
 868                 pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
 869                         __func__, MsgType, MsgLength);
 870                 print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
 871                                      buf, MsgLength);
 872                 break;
 873         }
 874
 875         return -ENOTSUPP;
 876 }
 877 EXPORT_SYMBOL_GPL(rndis_msg_parser);
 878
 879 static inline int rndis_get_nr(void)
 880 {
 881         return ida_simple_get(&rndis_ida, 0, 0, GFP_KERNEL);
 882 }
 883
 884 static inline void rndis_put_nr(int nr)
 885 {
 886         ida_simple_remove(&rndis_ida, nr);
 887 }
 888
 889 struct rndis_params *rndis_register(void (*resp_avail)(void *v), void *v)
 890 {
 891         struct rndis_params *params;
 892         int i;
 893
 894         if (!resp_avail)
 895                 return ERR_PTR(-EINVAL);
 896
 897         i = rndis_get_nr();
 898         if (i < 0) {
 899                 pr_debug("failed\n");
 900
 901                 return ERR_PTR(-ENODEV);
 902         }
 903
 904         params = kzalloc(sizeof(*params), GFP_KERNEL);
 905         if (!params) {
 906                 rndis_put_nr(i);
 907
 908                 return ERR_PTR(-ENOMEM);
 909         }
 910
 911 #ifdef  CONFIG_USB_GADGET_DEBUG_FILES
 912         {
 913                 struct proc_dir_entry *proc_entry;
 914                 char name[20];
 915
 916                 sprintf(name, NAME_TEMPLATE, i);
 917                 proc_entry = proc_create_data(name, 0660, NULL,
 918                                               &rndis_proc_fops, params);
 919                 if (!proc_entry) {
 920                         kfree(params);
 921                         rndis_put_nr(i);
 922
 923                         return ERR_PTR(-EIO);
 924                 }
 925         }
 926 #endif
 927
 928         params->confignr = i;
 929         params->used = 1;
 930         params->state = RNDIS_UNINITIALIZED;
 931         params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
 932         params->resp_avail = resp_avail;
 933         params->v = v;
 934         INIT_LIST_HEAD(&(params->resp_queue));
 935         pr_debug("%s: configNr = %d\n", __func__, i);
 936
 937         return params;
 938 }
 939 EXPORT_SYMBOL_GPL(rndis_register);
 940
 941 void rndis_deregister(struct rndis_params *params)
 942 {
 943         int i;
 944
 945         pr_debug("%s:\n", __func__);
 946
 947         if (!params)
 948                 return;
 949
 950         i = params->confignr;
 951
 952 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
 953         {
 954                 char name[20];
 955
 956                 sprintf(name, NAME_TEMPLATE, i);
 957                 remove_proc_entry(name, NULL);
 958         }
 959 #endif
 960
 961         kfree(params);
 962         rndis_put_nr(i);
 963 }
 964 EXPORT_SYMBOL_GPL(rndis_deregister);
 965 int rndis_set_param_dev(struct rndis_params *params, struct net_device *dev,
 966                         u16 *cdc_filter)
 967 {
 968         pr_debug("%s:\n", __func__);
 969         if (!dev)
 970                 return -EINVAL;
 971         if (!params)
 972                 return -1;
 973
 974         params->dev = dev;
 975         params->filter = cdc_filter;
 976
 977         rndis_ul_max_xfer_size_rcvd = 0;
 978         rndis_ul_max_pkt_per_xfer_rcvd = 0;
 979         return 0;
 980 }
 981 EXPORT_SYMBOL_GPL(rndis_set_param_dev);
 982
 983 int rndis_set_param_vendor(struct rndis_params *params, u32 vendorID,
 984                            const char *vendorDescr)
 985 {
 986         pr_debug("%s:\n", __func__);
 987         if (!vendorDescr) return -1;
 988         if (!params)
 989                 return -1;
 990
 991         params->vendorID = vendorID;
 992         params->vendorDescr = vendorDescr;
 993
 994         return 0;
 995 }
 996 EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
 997
 998 int rndis_set_param_medium(struct rndis_params *params, u32 medium, u32 speed)
 999 {
1000         pr_debug("%s: %u %u\n", __func__, medium, speed);
1001         if (!params)
1002                 return -1;
1003
1004         params->medium = medium;
1005         params->speed = speed;
1006
1007         return 0;
1008 }
1009 EXPORT_SYMBOL_GPL(rndis_set_param_medium);
1010
1011 void rndis_set_max_pkt_xfer(struct rndis_params *params, u8 max_pkt_per_xfer)
1012 {
1013         pr_debug("%s:\n", __func__);
1014
1015         params->max_pkt_per_xfer = max_pkt_per_xfer;
1016 }
1017
1018 void rndis_add_hdr(struct sk_buff *skb)
1019 {
1020         struct rndis_packet_msg_type *header;
1021
1022         if (!skb)
1023                 return;
1024         header = (void *)skb_push(skb, sizeof(*header));
1025         memset(header, 0, sizeof *header);
1026         header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
1027         header->MessageLength = cpu_to_le32(skb->len);
1028         header->DataOffset = cpu_to_le32(36);
1029         header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
1030 }
1031 EXPORT_SYMBOL_GPL(rndis_add_hdr);
1032
1033 void rndis_free_response(struct rndis_params *params, u8 *buf)
1034 {
1035         rndis_resp_t *r;
1036         struct list_head *act, *tmp;
1037
1038         list_for_each_safe(act, tmp, &(params->resp_queue))
1039         {
1040                 r = list_entry(act, rndis_resp_t, list);
1041                 if (r && r->buf == buf) {
1042                         list_del(&r->list);
1043                         kfree(r);
1044                 }
1045         }
1046 }
1047 EXPORT_SYMBOL_GPL(rndis_free_response);
1048
1049 u8 *rndis_get_next_response(struct rndis_params *params, u32 *length)
1050 {
1051         rndis_resp_t *r;
1052         struct list_head *act, *tmp;
1053
1054         if (!length) return NULL;
1055
1056         list_for_each_safe(act, tmp, &(params->resp_queue))
1057         {
1058                 r = list_entry(act, rndis_resp_t, list);
1059                 if (!r->send) {
1060                         r->send = 1;
1061                         *length = r->length;
1062                         return r->buf;
1063                 }
1064         }
1065
1066         return NULL;
1067 }
1068 EXPORT_SYMBOL_GPL(rndis_get_next_response);
1069
1070 static rndis_resp_t *rndis_add_response(struct rndis_params *params, u32 length)
1071 {
1072         rndis_resp_t *r;
1073
1074         /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
1075         r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
1076         if (!r) return NULL;
1077
1078         r->buf = (u8 *)(r + 1);
1079         r->length = length;
1080         r->send = 0;
1081
1082         list_add_tail(&r->list, &(params->resp_queue));
1083         return r;
1084 }
1085
1086 int rndis_rm_hdr(struct gether *port,
1087                         struct sk_buff *skb,
1088                         struct sk_buff_head *list)
1089 {
1090         int num_pkts = 1;
1091
1092         if (skb->len > rndis_ul_max_xfer_size_rcvd)
1093                 rndis_ul_max_xfer_size_rcvd = skb->len;
1094
1095         while (skb->len) {
1096                 struct rndis_packet_msg_type *hdr;
1097                 struct sk_buff          *skb2;
1098                 u32             msg_len, data_offset, data_len;
1099
1100                 /* some rndis hosts send extra byte to avoid zlp, ignore it */
1101                 if (skb->len == 1) {
1102                         dev_kfree_skb_any(skb);
1103                         return 0;
1104                 }
1105
1106                 if (skb->len < sizeof *hdr) {
1107                         pr_err("invalid rndis pkt: skblen:%u hdr_len:%zu",
1108                                         skb->len, sizeof *hdr);
1109                         dev_kfree_skb_any(skb);
1110                         return -EINVAL;
1111                 }
1112
1113                 hdr = (void *)skb->data;
1114                 msg_len = le32_to_cpu(hdr->MessageLength);
1115                 data_offset = le32_to_cpu(hdr->DataOffset);
1116                 data_len = le32_to_cpu(hdr->DataLength);
1117
1118                 if (skb->len < msg_len ||
1119                                 ((data_offset + data_len + 8) > msg_len)) {
1120                         pr_err("invalid rndis message: %d/%d/%d/%d, len:%d\n",
1121                                         le32_to_cpu(hdr->MessageType),
1122                                         msg_len, data_offset, data_len, skb->len);
1123                         dev_kfree_skb_any(skb);
1124                         return -EOVERFLOW;
1125                 }
1126                 if (le32_to_cpu(hdr->MessageType) != RNDIS_MSG_PACKET) {
1127                         pr_err("invalid rndis message: %d/%d/%d/%d, len:%d\n",
1128                                         le32_to_cpu(hdr->MessageType),
1129                                         msg_len, data_offset, data_len, skb->len);
1130                         dev_kfree_skb_any(skb);
1131                         return -EINVAL;
1132                 }
1133
1134                 skb_pull(skb, data_offset + 8);
1135
1136                 if (msg_len == skb->len) {
1137                         skb_trim(skb, data_len);
1138                         break;
1139                 }
1140
1141                 skb2 = skb_clone(skb, GFP_ATOMIC);
1142                 if (!skb2) {
1143                         pr_err("%s:skb clone failed\n", __func__);
1144                         dev_kfree_skb_any(skb);
1145                         return -ENOMEM;
1146                 }
1147
1148                 skb_pull(skb, msg_len - sizeof *hdr);
1149                 skb_trim(skb2, data_len);
1150                 skb_queue_tail(list, skb2);
1151
1152                 num_pkts++;
1153         }
1154
1155         if (num_pkts > rndis_ul_max_pkt_per_xfer_rcvd)
1156                 rndis_ul_max_pkt_per_xfer_rcvd = num_pkts;
1157
1158         skb_queue_tail(list, skb);
1159         return 0;
1160 }
1161 EXPORT_SYMBOL_GPL(rndis_rm_hdr);
1162
1163 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1164
1165 static int rndis_proc_show(struct seq_file *m, void *v)
1166 {
1167         rndis_params *param = m->private;
1168
1169         seq_printf(m,
1170                          "Config Nr. %d\n"
1171                          "used      : %s\n"
1172                          "state     : %s\n"
1173                          "medium    : 0x%08X\n"
1174                          "speed     : %d\n"
1175                          "cable     : %s\n"
1176                          "vendor ID : 0x%08X\n"
1177                          "vendor    : %s\n",
1178                          param->confignr, (param->used) ? "y" : "n",
1179                          ({ char *s = "?";
1180                          switch (param->state) {
1181                          case RNDIS_UNINITIALIZED:
1182                                 s = "RNDIS_UNINITIALIZED"; break;
1183                          case RNDIS_INITIALIZED:
1184                                 s = "RNDIS_INITIALIZED"; break;
1185                          case RNDIS_DATA_INITIALIZED:
1186                                 s = "RNDIS_DATA_INITIALIZED"; break;
1187                         } s; }),
1188                          param->medium,
1189                          (param->media_state) ? 0 : param->speed*100,
1190                          (param->media_state) ? "disconnected" : "connected",
1191                          param->vendorID, param->vendorDescr);
1192         return 0;
1193 }
1194
1195 static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
1196                                 size_t count, loff_t *ppos)
1197 {
1198         rndis_params *p = PDE_DATA(file_inode(file));
1199         u32 speed = 0;
1200         int i, fl_speed = 0;
1201
1202         for (i = 0; i < count; i++) {
1203                 char c;
1204                 if (get_user(c, buffer))
1205                         return -EFAULT;
1206                 switch (c) {
1207                 case '0':
1208                 case '1':
1209                 case '2':
1210                 case '3':
1211                 case '4':
1212                 case '5':
1213                 case '6':
1214                 case '7':
1215                 case '8':
1216                 case '9':
1217                         fl_speed = 1;
1218                         speed = speed * 10 + c - '0';
1219                         break;
1220                 case 'C':
1221                 case 'c':
1222                         rndis_signal_connect(p);
1223                         break;
1224                 case 'D':
1225                 case 'd':
1226                         rndis_signal_disconnect(p);
1227                         break;
1228                 default:
1229                         if (fl_speed) p->speed = speed;
1230                         else pr_debug("%c is not valid\n", c);
1231                         break;
1232                 }
1233
1234                 buffer++;
1235         }
1236
1237         return count;
1238 }
1239
1240 static int rndis_proc_open(struct inode *inode, struct file *file)
1241 {
1242         return single_open(file, rndis_proc_show, PDE_DATA(inode));
1243 }
1244
1245 static const struct file_operations rndis_proc_fops = {
1246         .owner          = THIS_MODULE,
1247         .open           = rndis_proc_open,
1248         .read           = seq_read,
1249         .llseek         = seq_lseek,
1250         .release        = single_release,
1251         .write          = rndis_proc_write,
1252 };
1253
1254 #define NAME_TEMPLATE "driver/rndis-%03d"
1255
1256 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */