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