drivers/usb/gadget/function/f_sourcesink.c

   1 /*
   2  * f_sourcesink.c - USB peripheral source/sink configuration driver
   3  *
   4  * Copyright (C) 2003-2008 David Brownell
   5  * Copyright (C) 2008 by Nokia Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  */
  12
  13 /* #define VERBOSE_DEBUG */
  14
  15 #include <linux/slab.h>
  16 #include <linux/kernel.h>
  17 #include <linux/device.h>
  18 #include <linux/module.h>
  19 #include <linux/usb/composite.h>
  20 #include <linux/err.h>
  21
  22 #include "g_zero.h"
  23 #include "u_f.h"
  24
  25 /*
  26  * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
  27  * controller drivers.
  28  *
  29  * This just sinks bulk packets OUT to the peripheral and sources them IN
  30  * to the host, optionally with specific data patterns for integrity tests.
  31  * As such it supports basic functionality and load tests.
  32  *
  33  * In terms of control messaging, this supports all the standard requests
  34  * plus two that support control-OUT tests.  If the optional "autoresume"
  35  * mode is enabled, it provides good functional coverage for the "USBCV"
  36  * test harness from USB-IF.
  37  */
  38 struct f_sourcesink {
  39         struct usb_function     function;
  40
  41         struct usb_ep           *in_ep;
  42         struct usb_ep           *out_ep;
  43         struct usb_ep           *iso_in_ep;
  44         struct usb_ep           *iso_out_ep;
  45         int                     cur_alt;
  46
  47         unsigned pattern;
  48         unsigned isoc_interval;
  49         unsigned isoc_maxpacket;
  50         unsigned isoc_mult;
  51         unsigned isoc_maxburst;
  52         unsigned buflen;
  53         unsigned bulk_qlen;
  54         unsigned iso_qlen;
  55 };
  56
  57 static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
  58 {
  59         return container_of(f, struct f_sourcesink, function);
  60 }
  61
  62 /*-------------------------------------------------------------------------*/
  63
  64 static struct usb_interface_descriptor source_sink_intf_alt0 = {
  65         .bLength =              USB_DT_INTERFACE_SIZE,
  66         .bDescriptorType =      USB_DT_INTERFACE,
  67
  68         .bAlternateSetting =    0,
  69         .bNumEndpoints =        2,
  70         .bInterfaceClass =      USB_CLASS_VENDOR_SPEC,
  71         /* .iInterface          = DYNAMIC */
  72 };
  73
  74 static struct usb_interface_descriptor source_sink_intf_alt1 = {
  75         .bLength =              USB_DT_INTERFACE_SIZE,
  76         .bDescriptorType =      USB_DT_INTERFACE,
  77
  78         .bAlternateSetting =    1,
  79         .bNumEndpoints =        4,
  80         .bInterfaceClass =      USB_CLASS_VENDOR_SPEC,
  81         /* .iInterface          = DYNAMIC */
  82 };
  83
  84 /* full speed support: */
  85
  86 static struct usb_endpoint_descriptor fs_source_desc = {
  87         .bLength =              USB_DT_ENDPOINT_SIZE,
  88         .bDescriptorType =      USB_DT_ENDPOINT,
  89
  90         .bEndpointAddress =     USB_DIR_IN,
  91         .bmAttributes =         USB_ENDPOINT_XFER_BULK,
  92 };
  93
  94 static struct usb_endpoint_descriptor fs_sink_desc = {
  95         .bLength =              USB_DT_ENDPOINT_SIZE,
  96         .bDescriptorType =      USB_DT_ENDPOINT,
  97
  98         .bEndpointAddress =     USB_DIR_OUT,
  99         .bmAttributes =         USB_ENDPOINT_XFER_BULK,
 100 };
 101
 102 static struct usb_endpoint_descriptor fs_iso_source_desc = {
 103         .bLength =              USB_DT_ENDPOINT_SIZE,
 104         .bDescriptorType =      USB_DT_ENDPOINT,
 105
 106         .bEndpointAddress =     USB_DIR_IN,
 107         .bmAttributes =         USB_ENDPOINT_XFER_ISOC,
 108         .wMaxPacketSize =       cpu_to_le16(1023),
 109         .bInterval =            4,
 110 };
 111
 112 static struct usb_endpoint_descriptor fs_iso_sink_desc = {
 113         .bLength =              USB_DT_ENDPOINT_SIZE,
 114         .bDescriptorType =      USB_DT_ENDPOINT,
 115
 116         .bEndpointAddress =     USB_DIR_OUT,
 117         .bmAttributes =         USB_ENDPOINT_XFER_ISOC,
 118         .wMaxPacketSize =       cpu_to_le16(1023),
 119         .bInterval =            4,
 120 };
 121
 122 static struct usb_descriptor_header *fs_source_sink_descs[] = {
 123         (struct usb_descriptor_header *) &source_sink_intf_alt0,
 124         (struct usb_descriptor_header *) &fs_sink_desc,
 125         (struct usb_descriptor_header *) &fs_source_desc,
 126         (struct usb_descriptor_header *) &source_sink_intf_alt1,
 127 #define FS_ALT_IFC_1_OFFSET     3
 128         (struct usb_descriptor_header *) &fs_sink_desc,
 129         (struct usb_descriptor_header *) &fs_source_desc,
 130         (struct usb_descriptor_header *) &fs_iso_sink_desc,
 131         (struct usb_descriptor_header *) &fs_iso_source_desc,
 132         NULL,
 133 };
 134
 135 /* high speed support: */
 136
 137 static struct usb_endpoint_descriptor hs_source_desc = {
 138         .bLength =              USB_DT_ENDPOINT_SIZE,
 139         .bDescriptorType =      USB_DT_ENDPOINT,
 140
 141         .bmAttributes =         USB_ENDPOINT_XFER_BULK,
 142         .wMaxPacketSize =       cpu_to_le16(512),
 143 };
 144
 145 static struct usb_endpoint_descriptor hs_sink_desc = {
 146         .bLength =              USB_DT_ENDPOINT_SIZE,
 147         .bDescriptorType =      USB_DT_ENDPOINT,
 148
 149         .bmAttributes =         USB_ENDPOINT_XFER_BULK,
 150         .wMaxPacketSize =       cpu_to_le16(512),
 151 };
 152
 153 static struct usb_endpoint_descriptor hs_iso_source_desc = {
 154         .bLength =              USB_DT_ENDPOINT_SIZE,
 155         .bDescriptorType =      USB_DT_ENDPOINT,
 156
 157         .bmAttributes =         USB_ENDPOINT_XFER_ISOC,
 158         .wMaxPacketSize =       cpu_to_le16(1024),
 159         .bInterval =            4,
 160 };
 161
 162 static struct usb_endpoint_descriptor hs_iso_sink_desc = {
 163         .bLength =              USB_DT_ENDPOINT_SIZE,
 164         .bDescriptorType =      USB_DT_ENDPOINT,
 165
 166         .bmAttributes =         USB_ENDPOINT_XFER_ISOC,
 167         .wMaxPacketSize =       cpu_to_le16(1024),
 168         .bInterval =            4,
 169 };
 170
 171 static struct usb_descriptor_header *hs_source_sink_descs[] = {
 172         (struct usb_descriptor_header *) &source_sink_intf_alt0,
 173         (struct usb_descriptor_header *) &hs_source_desc,
 174         (struct usb_descriptor_header *) &hs_sink_desc,
 175         (struct usb_descriptor_header *) &source_sink_intf_alt1,
 176 #define HS_ALT_IFC_1_OFFSET     3
 177         (struct usb_descriptor_header *) &hs_source_desc,
 178         (struct usb_descriptor_header *) &hs_sink_desc,
 179         (struct usb_descriptor_header *) &hs_iso_source_desc,
 180         (struct usb_descriptor_header *) &hs_iso_sink_desc,
 181         NULL,
 182 };
 183
 184 /* super speed support: */
 185
 186 static struct usb_endpoint_descriptor ss_source_desc = {
 187         .bLength =              USB_DT_ENDPOINT_SIZE,
 188         .bDescriptorType =      USB_DT_ENDPOINT,
 189
 190         .bmAttributes =         USB_ENDPOINT_XFER_BULK,
 191         .wMaxPacketSize =       cpu_to_le16(1024),
 192 };
 193
 194 static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
 195         .bLength =              USB_DT_SS_EP_COMP_SIZE,
 196         .bDescriptorType =      USB_DT_SS_ENDPOINT_COMP,
 197
 198         .bMaxBurst =            0,
 199         .bmAttributes =         0,
 200         .wBytesPerInterval =    0,
 201 };
 202
 203 static struct usb_endpoint_descriptor ss_sink_desc = {
 204         .bLength =              USB_DT_ENDPOINT_SIZE,
 205         .bDescriptorType =      USB_DT_ENDPOINT,
 206
 207         .bmAttributes =         USB_ENDPOINT_XFER_BULK,
 208         .wMaxPacketSize =       cpu_to_le16(1024),
 209 };
 210
 211 static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
 212         .bLength =              USB_DT_SS_EP_COMP_SIZE,
 213         .bDescriptorType =      USB_DT_SS_ENDPOINT_COMP,
 214
 215         .bMaxBurst =            0,
 216         .bmAttributes =         0,
 217         .wBytesPerInterval =    0,
 218 };
 219
 220 static struct usb_endpoint_descriptor ss_iso_source_desc = {
 221         .bLength =              USB_DT_ENDPOINT_SIZE,
 222         .bDescriptorType =      USB_DT_ENDPOINT,
 223
 224         .bmAttributes =         USB_ENDPOINT_XFER_ISOC,
 225         .wMaxPacketSize =       cpu_to_le16(1024),
 226         .bInterval =            4,
 227 };
 228
 229 static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
 230         .bLength =              USB_DT_SS_EP_COMP_SIZE,
 231         .bDescriptorType =      USB_DT_SS_ENDPOINT_COMP,
 232
 233         .bMaxBurst =            0,
 234         .bmAttributes =         0,
 235         .wBytesPerInterval =    cpu_to_le16(1024),
 236 };
 237
 238 static struct usb_endpoint_descriptor ss_iso_sink_desc = {
 239         .bLength =              USB_DT_ENDPOINT_SIZE,
 240         .bDescriptorType =      USB_DT_ENDPOINT,
 241
 242         .bmAttributes =         USB_ENDPOINT_XFER_ISOC,
 243         .wMaxPacketSize =       cpu_to_le16(1024),
 244         .bInterval =            4,
 245 };
 246
 247 static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
 248         .bLength =              USB_DT_SS_EP_COMP_SIZE,
 249         .bDescriptorType =      USB_DT_SS_ENDPOINT_COMP,
 250
 251         .bMaxBurst =            0,
 252         .bmAttributes =         0,
 253         .wBytesPerInterval =    cpu_to_le16(1024),
 254 };
 255
 256 static struct usb_descriptor_header *ss_source_sink_descs[] = {
 257         (struct usb_descriptor_header *) &source_sink_intf_alt0,
 258         (struct usb_descriptor_header *) &ss_source_desc,
 259         (struct usb_descriptor_header *) &ss_source_comp_desc,
 260         (struct usb_descriptor_header *) &ss_sink_desc,
 261         (struct usb_descriptor_header *) &ss_sink_comp_desc,
 262         (struct usb_descriptor_header *) &source_sink_intf_alt1,
 263 #define SS_ALT_IFC_1_OFFSET     5
 264         (struct usb_descriptor_header *) &ss_source_desc,
 265         (struct usb_descriptor_header *) &ss_source_comp_desc,
 266         (struct usb_descriptor_header *) &ss_sink_desc,
 267         (struct usb_descriptor_header *) &ss_sink_comp_desc,
 268         (struct usb_descriptor_header *) &ss_iso_source_desc,
 269         (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
 270         (struct usb_descriptor_header *) &ss_iso_sink_desc,
 271         (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
 272         NULL,
 273 };
 274
 275 /* function-specific strings: */
 276
 277 static struct usb_string strings_sourcesink[] = {
 278         [0].s = "source and sink data",
 279         {  }                    /* end of list */
 280 };
 281
 282 static struct usb_gadget_strings stringtab_sourcesink = {
 283         .language       = 0x0409,       /* en-us */
 284         .strings        = strings_sourcesink,
 285 };
 286
 287 static struct usb_gadget_strings *sourcesink_strings[] = {
 288         &stringtab_sourcesink,
 289         NULL,
 290 };
 291
 292 /*-------------------------------------------------------------------------*/
 293
 294 static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
 295 {
 296         return alloc_ep_req(ep, len);
 297 }
 298
 299 static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
 300 {
 301         int                     value;
 302
 303         value = usb_ep_disable(ep);
 304         if (value < 0)
 305                 DBG(cdev, "disable %s --> %d\n", ep->name, value);
 306 }
 307
 308 void disable_endpoints(struct usb_composite_dev *cdev,
 309                 struct usb_ep *in, struct usb_ep *out,
 310                 struct usb_ep *iso_in, struct usb_ep *iso_out)
 311 {
 312         disable_ep(cdev, in);
 313         disable_ep(cdev, out);
 314         if (iso_in)
 315                 disable_ep(cdev, iso_in);
 316         if (iso_out)
 317                 disable_ep(cdev, iso_out);
 318 }
 319
 320 static int
 321 sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
 322 {
 323         struct usb_composite_dev *cdev = c->cdev;
 324         struct f_sourcesink     *ss = func_to_ss(f);
 325         int     id;
 326         int ret;
 327
 328         /* allocate interface ID(s) */
 329         id = usb_interface_id(c, f);
 330         if (id < 0)
 331                 return id;
 332         source_sink_intf_alt0.bInterfaceNumber = id;
 333         source_sink_intf_alt1.bInterfaceNumber = id;
 334
 335         /* allocate bulk endpoints */
 336         ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
 337         if (!ss->in_ep) {
 338 autoconf_fail:
 339                 ERROR(cdev, "%s: can't autoconfigure on %s\n",
 340                         f->name, cdev->gadget->name);
 341                 return -ENODEV;
 342         }
 343
 344         ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
 345         if (!ss->out_ep)
 346                 goto autoconf_fail;
 347
 348         /* sanity check the isoc module parameters */
 349         if (ss->isoc_interval < 1)
 350                 ss->isoc_interval = 1;
 351         if (ss->isoc_interval > 16)
 352                 ss->isoc_interval = 16;
 353         if (ss->isoc_mult > 2)
 354                 ss->isoc_mult = 2;
 355         if (ss->isoc_maxburst > 15)
 356                 ss->isoc_maxburst = 15;
 357
 358         /* fill in the FS isoc descriptors from the module parameters */
 359         fs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
 360                                                 1023 : ss->isoc_maxpacket;
 361         fs_iso_source_desc.bInterval = ss->isoc_interval;
 362         fs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
 363                                                 1023 : ss->isoc_maxpacket;
 364         fs_iso_sink_desc.bInterval = ss->isoc_interval;
 365
 366         /* allocate iso endpoints */
 367         ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
 368         if (!ss->iso_in_ep)
 369                 goto no_iso;
 370
 371         ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
 372         if (!ss->iso_out_ep) {
 373                 usb_ep_autoconfig_release(ss->iso_in_ep);
 374                 ss->iso_in_ep = NULL;
 375 no_iso:
 376                 /*
 377                  * We still want to work even if the UDC doesn't have isoc
 378                  * endpoints, so null out the alt interface that contains
 379                  * them and continue.
 380                  */
 381                 fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
 382                 hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
 383                 ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
 384         }
 385
 386         if (ss->isoc_maxpacket > 1024)
 387                 ss->isoc_maxpacket = 1024;
 388
 389         /* support high speed hardware */
 390         hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
 391         hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
 392
 393         /*
 394          * Fill in the HS isoc descriptors from the module parameters.
 395          * We assume that the user knows what they are doing and won't
 396          * give parameters that their UDC doesn't support.
 397          */
 398         hs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
 399         hs_iso_source_desc.wMaxPacketSize |= ss->isoc_mult << 11;
 400         hs_iso_source_desc.bInterval = ss->isoc_interval;
 401         hs_iso_source_desc.bEndpointAddress =
 402                 fs_iso_source_desc.bEndpointAddress;
 403
 404         hs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
 405         hs_iso_sink_desc.wMaxPacketSize |= ss->isoc_mult << 11;
 406         hs_iso_sink_desc.bInterval = ss->isoc_interval;
 407         hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
 408
 409         /* support super speed hardware */
 410         ss_source_desc.bEndpointAddress =
 411                 fs_source_desc.bEndpointAddress;
 412         ss_sink_desc.bEndpointAddress =
 413                 fs_sink_desc.bEndpointAddress;
 414
 415         /*
 416          * Fill in the SS isoc descriptors from the module parameters.
 417          * We assume that the user knows what they are doing and won't
 418          * give parameters that their UDC doesn't support.
 419          */
 420         ss_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
 421         ss_iso_source_desc.bInterval = ss->isoc_interval;
 422         ss_iso_source_comp_desc.bmAttributes = ss->isoc_mult;
 423         ss_iso_source_comp_desc.bMaxBurst = ss->isoc_maxburst;
 424         ss_iso_source_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
 425                 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
 426         ss_iso_source_desc.bEndpointAddress =
 427                 fs_iso_source_desc.bEndpointAddress;
 428
 429         ss_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
 430         ss_iso_sink_desc.bInterval = ss->isoc_interval;
 431         ss_iso_sink_comp_desc.bmAttributes = ss->isoc_mult;
 432         ss_iso_sink_comp_desc.bMaxBurst = ss->isoc_maxburst;
 433         ss_iso_sink_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
 434                 (ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
 435         ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
 436
 437         ret = usb_assign_descriptors(f, fs_source_sink_descs,
 438                         hs_source_sink_descs, ss_source_sink_descs, NULL);
 439         if (ret)
 440                 return ret;
 441
 442         DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
 443             (gadget_is_superspeed(c->cdev->gadget) ? "super" :
 444              (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
 445                         f->name, ss->in_ep->name, ss->out_ep->name,
 446                         ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
 447                         ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
 448         return 0;
 449 }
 450
 451 static void
 452 sourcesink_free_func(struct usb_function *f)
 453 {
 454         struct f_ss_opts *opts;
 455
 456         opts = container_of(f->fi, struct f_ss_opts, func_inst);
 457
 458         mutex_lock(&opts->lock);
 459         opts->refcnt--;
 460         mutex_unlock(&opts->lock);
 461
 462         usb_free_all_descriptors(f);
 463         kfree(func_to_ss(f));
 464 }
 465
 466 /* optionally require specific source/sink data patterns  */
 467 static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
 468 {
 469         unsigned                i;
 470         u8                      *buf = req->buf;
 471         struct usb_composite_dev *cdev = ss->function.config->cdev;
 472         int max_packet_size = le16_to_cpu(ss->out_ep->desc->wMaxPacketSize);
 473
 474         if (ss->pattern == 2)
 475                 return 0;
 476
 477         for (i = 0; i < req->actual; i++, buf++) {
 478                 switch (ss->pattern) {
 479
 480                 /* all-zeroes has no synchronization issues */
 481                 case 0:
 482                         if (*buf == 0)
 483                                 continue;
 484                         break;
 485
 486                 /* "mod63" stays in sync with short-terminated transfers,
 487                  * OR otherwise when host and gadget agree on how large
 488                  * each usb transfer request should be.  Resync is done
 489                  * with set_interface or set_config.  (We *WANT* it to
 490                  * get quickly out of sync if controllers or their drivers
 491                  * stutter for any reason, including buffer duplication...)
 492                  */
 493                 case 1:
 494                         if (*buf == (u8)((i % max_packet_size) % 63))
 495                                 continue;
 496                         break;
 497                 }
 498                 ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
 499                 usb_ep_set_halt(ss->out_ep);
 500                 return -EINVAL;
 501         }
 502         return 0;
 503 }
 504
 505 static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
 506 {
 507         unsigned        i;
 508         u8              *buf = req->buf;
 509         int max_packet_size = le16_to_cpu(ep->desc->wMaxPacketSize);
 510         struct f_sourcesink *ss = ep->driver_data;
 511
 512         switch (ss->pattern) {
 513         case 0:
 514                 memset(req->buf, 0, req->length);
 515                 break;
 516         case 1:
 517                 for  (i = 0; i < req->length; i++)
 518                         *buf++ = (u8) ((i % max_packet_size) % 63);
 519                 break;
 520         case 2:
 521                 break;
 522         }
 523 }
 524
 525 static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
 526 {
 527         struct usb_composite_dev        *cdev;
 528         struct f_sourcesink             *ss = ep->driver_data;
 529         int                             status = req->status;
 530
 531         /* driver_data will be null if ep has been disabled */
 532         if (!ss)
 533                 return;
 534
 535         cdev = ss->function.config->cdev;
 536
 537         switch (status) {
 538
 539         case 0:                         /* normal completion? */
 540                 if (ep == ss->out_ep) {
 541                         check_read_data(ss, req);
 542                         if (ss->pattern != 2)
 543                                 memset(req->buf, 0x55, req->length);
 544                 }
 545                 break;
 546
 547         /* this endpoint is normally active while we're configured */
 548         case -ECONNABORTED:             /* hardware forced ep reset */
 549         case -ECONNRESET:               /* request dequeued */
 550         case -ESHUTDOWN:                /* disconnect from host */
 551                 VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
 552                                 req->actual, req->length);
 553                 if (ep == ss->out_ep)
 554                         check_read_data(ss, req);
 555                 free_ep_req(ep, req);
 556                 return;
 557
 558         case -EOVERFLOW:                /* buffer overrun on read means that
 559                                          * we didn't provide a big enough
 560                                          * buffer.
 561                                          */
 562         default:
 563 #if 1
 564                 DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
 565                                 status, req->actual, req->length);
 566 #endif
 567         case -EREMOTEIO:                /* short read */
 568                 break;
 569         }
 570
 571         status = usb_ep_queue(ep, req, GFP_ATOMIC);
 572         if (status) {
 573                 ERROR(cdev, "kill %s:  resubmit %d bytes --> %d\n",
 574                                 ep->name, req->length, status);
 575                 usb_ep_set_halt(ep);
 576                 /* FIXME recover later ... somehow */
 577         }
 578 }
 579
 580 static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
 581                 bool is_iso, int speed)
 582 {
 583         struct usb_ep           *ep;
 584         struct usb_request      *req;
 585         int                     i, size, qlen, status = 0;
 586
 587         if (is_iso) {
 588                 switch (speed) {
 589                 case USB_SPEED_SUPER:
 590                         size = ss->isoc_maxpacket *
 591                                         (ss->isoc_mult + 1) *
 592                                         (ss->isoc_maxburst + 1);
 593                         break;
 594                 case USB_SPEED_HIGH:
 595                         size = ss->isoc_maxpacket * (ss->isoc_mult + 1);
 596                         break;
 597                 default:
 598                         size = ss->isoc_maxpacket > 1023 ?
 599                                         1023 : ss->isoc_maxpacket;
 600                         break;
 601                 }
 602                 ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
 603                 qlen = ss->iso_qlen;
 604         } else {
 605                 ep = is_in ? ss->in_ep : ss->out_ep;
 606                 qlen = ss->bulk_qlen;
 607                 size = ss->buflen;
 608         }
 609
 610         for (i = 0; i < qlen; i++) {
 611                 req = ss_alloc_ep_req(ep, size);
 612                 if (!req)
 613                         return -ENOMEM;
 614
 615                 req->complete = source_sink_complete;
 616                 if (is_in)
 617                         reinit_write_data(ep, req);
 618                 else if (ss->pattern != 2)
 619                         memset(req->buf, 0x55, req->length);
 620
 621                 status = usb_ep_queue(ep, req, GFP_ATOMIC);
 622                 if (status) {
 623                         struct usb_composite_dev        *cdev;
 624
 625                         cdev = ss->function.config->cdev;
 626                         ERROR(cdev, "start %s%s %s --> %d\n",
 627                               is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
 628                               ep->name, status);
 629                         free_ep_req(ep, req);
 630                         return status;
 631                 }
 632         }
 633
 634         return status;
 635 }
 636
 637 static void disable_source_sink(struct f_sourcesink *ss)
 638 {
 639         struct usb_composite_dev        *cdev;
 640
 641         cdev = ss->function.config->cdev;
 642         disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
 643                         ss->iso_out_ep);
 644         VDBG(cdev, "%s disabled\n", ss->function.name);
 645 }
 646
 647 static int
 648 enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
 649                 int alt)
 650 {
 651         int                                     result = 0;
 652         int                                     speed = cdev->gadget->speed;
 653         struct usb_ep                           *ep;
 654
 655         /* one bulk endpoint writes (sources) zeroes IN (to the host) */
 656         ep = ss->in_ep;
 657         result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
 658         if (result)
 659                 return result;
 660         result = usb_ep_enable(ep);
 661         if (result < 0)
 662                 return result;
 663         ep->driver_data = ss;
 664
 665         result = source_sink_start_ep(ss, true, false, speed);
 666         if (result < 0) {
 667 fail:
 668                 ep = ss->in_ep;
 669                 usb_ep_disable(ep);
 670                 return result;
 671         }
 672
 673         /* one bulk endpoint reads (sinks) anything OUT (from the host) */
 674         ep = ss->out_ep;
 675         result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
 676         if (result)
 677                 goto fail;
 678         result = usb_ep_enable(ep);
 679         if (result < 0)
 680                 goto fail;
 681         ep->driver_data = ss;
 682
 683         result = source_sink_start_ep(ss, false, false, speed);
 684         if (result < 0) {
 685 fail2:
 686                 ep = ss->out_ep;
 687                 usb_ep_disable(ep);
 688                 goto fail;
 689         }
 690
 691         if (alt == 0)
 692                 goto out;
 693
 694         /* one iso endpoint writes (sources) zeroes IN (to the host) */
 695         ep = ss->iso_in_ep;
 696         if (ep) {
 697                 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
 698                 if (result)
 699                         goto fail2;
 700                 result = usb_ep_enable(ep);
 701                 if (result < 0)
 702                         goto fail2;
 703                 ep->driver_data = ss;
 704
 705                 result = source_sink_start_ep(ss, true, true, speed);
 706                 if (result < 0) {
 707 fail3:
 708                         ep = ss->iso_in_ep;
 709                         if (ep)
 710                                 usb_ep_disable(ep);
 711                         goto fail2;
 712                 }
 713         }
 714
 715         /* one iso endpoint reads (sinks) anything OUT (from the host) */
 716         ep = ss->iso_out_ep;
 717         if (ep) {
 718                 result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
 719                 if (result)
 720                         goto fail3;
 721                 result = usb_ep_enable(ep);
 722                 if (result < 0)
 723                         goto fail3;
 724                 ep->driver_data = ss;
 725
 726                 result = source_sink_start_ep(ss, false, true, speed);
 727                 if (result < 0) {
 728                         usb_ep_disable(ep);
 729                         goto fail3;
 730                 }
 731         }
 732 out:
 733         ss->cur_alt = alt;
 734
 735         DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
 736         return result;
 737 }
 738
 739 static int sourcesink_set_alt(struct usb_function *f,
 740                 unsigned intf, unsigned alt)
 741 {
 742         struct f_sourcesink             *ss = func_to_ss(f);
 743         struct usb_composite_dev        *cdev = f->config->cdev;
 744
 745         disable_source_sink(ss);
 746         return enable_source_sink(cdev, ss, alt);
 747 }
 748
 749 static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
 750 {
 751         struct f_sourcesink             *ss = func_to_ss(f);
 752
 753         return ss->cur_alt;
 754 }
 755
 756 static void sourcesink_disable(struct usb_function *f)
 757 {
 758         struct f_sourcesink     *ss = func_to_ss(f);
 759
 760         disable_source_sink(ss);
 761 }
 762
 763 /*-------------------------------------------------------------------------*/
 764
 765 static int sourcesink_setup(struct usb_function *f,
 766                 const struct usb_ctrlrequest *ctrl)
 767 {
 768         struct usb_configuration        *c = f->config;
 769         struct usb_request      *req = c->cdev->req;
 770         int                     value = -EOPNOTSUPP;
 771         u16                     w_index = le16_to_cpu(ctrl->wIndex);
 772         u16                     w_value = le16_to_cpu(ctrl->wValue);
 773         u16                     w_length = le16_to_cpu(ctrl->wLength);
 774
 775         req->length = USB_COMP_EP0_BUFSIZ;
 776
 777         /* composite driver infrastructure handles everything except
 778          * the two control test requests.
 779          */
 780         switch (ctrl->bRequest) {
 781
 782         /*
 783          * These are the same vendor-specific requests supported by
 784          * Intel's USB 2.0 compliance test devices.  We exceed that
 785          * device spec by allowing multiple-packet requests.
 786          *
 787          * NOTE:  the Control-OUT data stays in req->buf ... better
 788          * would be copying it into a scratch buffer, so that other
 789          * requests may safely intervene.
 790          */
 791         case 0x5b:      /* control WRITE test -- fill the buffer */
 792                 if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
 793                         goto unknown;
 794                 if (w_value || w_index)
 795                         break;
 796                 /* just read that many bytes into the buffer */
 797                 if (w_length > req->length)
 798                         break;
 799                 value = w_length;
 800                 break;
 801         case 0x5c:      /* control READ test -- return the buffer */
 802                 if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
 803                         goto unknown;
 804                 if (w_value || w_index)
 805                         break;
 806                 /* expect those bytes are still in the buffer; send back */
 807                 if (w_length > req->length)
 808                         break;
 809                 value = w_length;
 810                 break;
 811
 812         default:
 813 unknown:
 814                 VDBG(c->cdev,
 815                         "unknown control req%02x.%02x v%04x i%04x l%d\n",
 816                         ctrl->bRequestType, ctrl->bRequest,
 817                         w_value, w_index, w_length);
 818         }
 819
 820         /* respond with data transfer or status phase? */
 821         if (value >= 0) {
 822                 VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
 823                         ctrl->bRequestType, ctrl->bRequest,
 824                         w_value, w_index, w_length);
 825                 req->zero = 0;
 826                 req->length = value;
 827                 value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
 828                 if (value < 0)
 829                         ERROR(c->cdev, "source/sink response, err %d\n",
 830                                         value);
 831         }
 832
 833         /* device either stalls (value < 0) or reports success */
 834         return value;
 835 }
 836
 837 static struct usb_function *source_sink_alloc_func(
 838                 struct usb_function_instance *fi)
 839 {
 840         struct f_sourcesink     *ss;
 841         struct f_ss_opts        *ss_opts;
 842
 843         ss = kzalloc(sizeof(*ss), GFP_KERNEL);
 844         if (!ss)
 845                 return NULL;
 846
 847         ss_opts =  container_of(fi, struct f_ss_opts, func_inst);
 848
 849         mutex_lock(&ss_opts->lock);
 850         ss_opts->refcnt++;
 851         mutex_unlock(&ss_opts->lock);
 852
 853         ss->pattern = ss_opts->pattern;
 854         ss->isoc_interval = ss_opts->isoc_interval;
 855         ss->isoc_maxpacket = ss_opts->isoc_maxpacket;
 856         ss->isoc_mult = ss_opts->isoc_mult;
 857         ss->isoc_maxburst = ss_opts->isoc_maxburst;
 858         ss->buflen = ss_opts->bulk_buflen;
 859         ss->bulk_qlen = ss_opts->bulk_qlen;
 860         ss->iso_qlen = ss_opts->iso_qlen;
 861
 862         ss->function.name = "source/sink";
 863         ss->function.bind = sourcesink_bind;
 864         ss->function.set_alt = sourcesink_set_alt;
 865         ss->function.get_alt = sourcesink_get_alt;
 866         ss->function.disable = sourcesink_disable;
 867         ss->function.setup = sourcesink_setup;
 868         ss->function.strings = sourcesink_strings;
 869
 870         ss->function.free_func = sourcesink_free_func;
 871
 872         return &ss->function;
 873 }
 874
 875 static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
 876 {
 877         return container_of(to_config_group(item), struct f_ss_opts,
 878                             func_inst.group);
 879 }
 880
 881 static void ss_attr_release(struct config_item *item)
 882 {
 883         struct f_ss_opts *ss_opts = to_f_ss_opts(item);
 884
 885         usb_put_function_instance(&ss_opts->func_inst);
 886 }
 887
 888 static struct configfs_item_operations ss_item_ops = {
 889         .release                = ss_attr_release,
 890 };
 891
 892 static ssize_t f_ss_opts_pattern_show(struct config_item *item, char *page)
 893 {
 894         struct f_ss_opts *opts = to_f_ss_opts(item);
 895         int result;
 896
 897         mutex_lock(&opts->lock);
 898         result = sprintf(page, "%u\n", opts->pattern);
 899         mutex_unlock(&opts->lock);
 900
 901         return result;
 902 }
 903
 904 static ssize_t f_ss_opts_pattern_store(struct config_item *item,
 905                                        const char *page, size_t len)
 906 {
 907         struct f_ss_opts *opts = to_f_ss_opts(item);
 908         int ret;
 909         u8 num;
 910
 911         mutex_lock(&opts->lock);
 912         if (opts->refcnt) {
 913                 ret = -EBUSY;
 914                 goto end;
 915         }
 916
 917         ret = kstrtou8(page, 0, &num);
 918         if (ret)
 919                 goto end;
 920
 921         if (num != 0 && num != 1 && num != 2) {
 922                 ret = -EINVAL;
 923                 goto end;
 924         }
 925
 926         opts->pattern = num;
 927         ret = len;
 928 end:
 929         mutex_unlock(&opts->lock);
 930         return ret;
 931 }
 932
 933 CONFIGFS_ATTR(f_ss_opts_, pattern);
 934
 935 static ssize_t f_ss_opts_isoc_interval_show(struct config_item *item, char *page)
 936 {
 937         struct f_ss_opts *opts = to_f_ss_opts(item);
 938         int result;
 939
 940         mutex_lock(&opts->lock);
 941         result = sprintf(page, "%u\n", opts->isoc_interval);
 942         mutex_unlock(&opts->lock);
 943
 944         return result;
 945 }
 946
 947 static ssize_t f_ss_opts_isoc_interval_store(struct config_item *item,
 948                                        const char *page, size_t len)
 949 {
 950         struct f_ss_opts *opts = to_f_ss_opts(item);
 951         int ret;
 952         u8 num;
 953
 954         mutex_lock(&opts->lock);
 955         if (opts->refcnt) {
 956                 ret = -EBUSY;
 957                 goto end;
 958         }
 959
 960         ret = kstrtou8(page, 0, &num);
 961         if (ret)
 962                 goto end;
 963
 964         if (num > 16) {
 965                 ret = -EINVAL;
 966                 goto end;
 967         }
 968
 969         opts->isoc_interval = num;
 970         ret = len;
 971 end:
 972         mutex_unlock(&opts->lock);
 973         return ret;
 974 }
 975
 976 CONFIGFS_ATTR(f_ss_opts_, isoc_interval);
 977
 978 static ssize_t f_ss_opts_isoc_maxpacket_show(struct config_item *item, char *page)
 979 {
 980         struct f_ss_opts *opts = to_f_ss_opts(item);
 981         int result;
 982
 983         mutex_lock(&opts->lock);
 984         result = sprintf(page, "%u\n", opts->isoc_maxpacket);
 985         mutex_unlock(&opts->lock);
 986
 987         return result;
 988 }
 989
 990 static ssize_t f_ss_opts_isoc_maxpacket_store(struct config_item *item,
 991                                        const char *page, size_t len)
 992 {
 993         struct f_ss_opts *opts = to_f_ss_opts(item);
 994         int ret;
 995         u16 num;
 996
 997         mutex_lock(&opts->lock);
 998         if (opts->refcnt) {
 999                 ret = -EBUSY;
1000                 goto end;
1001         }
1002
1003         ret = kstrtou16(page, 0, &num);
1004         if (ret)
1005                 goto end;
1006
1007         if (num > 1024) {
1008                 ret = -EINVAL;
1009                 goto end;
1010         }
1011
1012         opts->isoc_maxpacket = num;
1013         ret = len;
1014 end:
1015         mutex_unlock(&opts->lock);
1016         return ret;
1017 }
1018
1019 CONFIGFS_ATTR(f_ss_opts_, isoc_maxpacket);
1020
1021 static ssize_t f_ss_opts_isoc_mult_show(struct config_item *item, char *page)
1022 {
1023         struct f_ss_opts *opts = to_f_ss_opts(item);
1024         int result;
1025
1026         mutex_lock(&opts->lock);
1027         result = sprintf(page, "%u\n", opts->isoc_mult);
1028         mutex_unlock(&opts->lock);
1029
1030         return result;
1031 }
1032
1033 static ssize_t f_ss_opts_isoc_mult_store(struct config_item *item,
1034                                        const char *page, size_t len)
1035 {
1036         struct f_ss_opts *opts = to_f_ss_opts(item);
1037         int ret;
1038         u8 num;
1039
1040         mutex_lock(&opts->lock);
1041         if (opts->refcnt) {
1042                 ret = -EBUSY;
1043                 goto end;
1044         }
1045
1046         ret = kstrtou8(page, 0, &num);
1047         if (ret)
1048                 goto end;
1049
1050         if (num > 2) {
1051                 ret = -EINVAL;
1052                 goto end;
1053         }
1054
1055         opts->isoc_mult = num;
1056         ret = len;
1057 end:
1058         mutex_unlock(&opts->lock);
1059         return ret;
1060 }
1061
1062 CONFIGFS_ATTR(f_ss_opts_, isoc_mult);
1063
1064 static ssize_t f_ss_opts_isoc_maxburst_show(struct config_item *item, char *page)
1065 {
1066         struct f_ss_opts *opts = to_f_ss_opts(item);
1067         int result;
1068
1069         mutex_lock(&opts->lock);
1070         result = sprintf(page, "%u\n", opts->isoc_maxburst);
1071         mutex_unlock(&opts->lock);
1072
1073         return result;
1074 }
1075
1076 static ssize_t f_ss_opts_isoc_maxburst_store(struct config_item *item,
1077                                        const char *page, size_t len)
1078 {
1079         struct f_ss_opts *opts = to_f_ss_opts(item);
1080         int ret;
1081         u8 num;
1082
1083         mutex_lock(&opts->lock);
1084         if (opts->refcnt) {
1085                 ret = -EBUSY;
1086                 goto end;
1087         }
1088
1089         ret = kstrtou8(page, 0, &num);
1090         if (ret)
1091                 goto end;
1092
1093         if (num > 15) {
1094                 ret = -EINVAL;
1095                 goto end;
1096         }
1097
1098         opts->isoc_maxburst = num;
1099         ret = len;
1100 end:
1101         mutex_unlock(&opts->lock);
1102         return ret;
1103 }
1104
1105 CONFIGFS_ATTR(f_ss_opts_, isoc_maxburst);
1106
1107 static ssize_t f_ss_opts_bulk_buflen_show(struct config_item *item, char *page)
1108 {
1109         struct f_ss_opts *opts = to_f_ss_opts(item);
1110         int result;
1111
1112         mutex_lock(&opts->lock);
1113         result = sprintf(page, "%u\n", opts->bulk_buflen);
1114         mutex_unlock(&opts->lock);
1115
1116         return result;
1117 }
1118
1119 static ssize_t f_ss_opts_bulk_buflen_store(struct config_item *item,
1120                                            const char *page, size_t len)
1121 {
1122         struct f_ss_opts *opts = to_f_ss_opts(item);
1123         int ret;
1124         u32 num;
1125
1126         mutex_lock(&opts->lock);
1127         if (opts->refcnt) {
1128                 ret = -EBUSY;
1129                 goto end;
1130         }
1131
1132         ret = kstrtou32(page, 0, &num);
1133         if (ret)
1134                 goto end;
1135
1136         opts->bulk_buflen = num;
1137         ret = len;
1138 end:
1139         mutex_unlock(&opts->lock);
1140         return ret;
1141 }
1142
1143 CONFIGFS_ATTR(f_ss_opts_, bulk_buflen);
1144
1145 static ssize_t f_ss_opts_bulk_qlen_show(struct config_item *item, char *page)
1146 {
1147         struct f_ss_opts *opts = to_f_ss_opts(item);
1148         int result;
1149
1150         mutex_lock(&opts->lock);
1151         result = sprintf(page, "%u\n", opts->bulk_qlen);
1152         mutex_unlock(&opts->lock);
1153
1154         return result;
1155 }
1156
1157 static ssize_t f_ss_opts_bulk_qlen_store(struct config_item *item,
1158                                            const char *page, size_t len)
1159 {
1160         struct f_ss_opts *opts = to_f_ss_opts(item);
1161         int ret;
1162         u32 num;
1163
1164         mutex_lock(&opts->lock);
1165         if (opts->refcnt) {
1166                 ret = -EBUSY;
1167                 goto end;
1168         }
1169
1170         ret = kstrtou32(page, 0, &num);
1171         if (ret)
1172                 goto end;
1173
1174         opts->bulk_qlen = num;
1175         ret = len;
1176 end:
1177         mutex_unlock(&opts->lock);
1178         return ret;
1179 }
1180
1181 CONFIGFS_ATTR(f_ss_opts_, bulk_qlen);
1182
1183 static ssize_t f_ss_opts_iso_qlen_show(struct config_item *item, char *page)
1184 {
1185         struct f_ss_opts *opts = to_f_ss_opts(item);
1186         int result;
1187
1188         mutex_lock(&opts->lock);
1189         result = sprintf(page, "%u\n", opts->iso_qlen);
1190         mutex_unlock(&opts->lock);
1191
1192         return result;
1193 }
1194
1195 static ssize_t f_ss_opts_iso_qlen_store(struct config_item *item,
1196                                            const char *page, size_t len)
1197 {
1198         struct f_ss_opts *opts = to_f_ss_opts(item);
1199         int ret;
1200         u32 num;
1201
1202         mutex_lock(&opts->lock);
1203         if (opts->refcnt) {
1204                 ret = -EBUSY;
1205                 goto end;
1206         }
1207
1208         ret = kstrtou32(page, 0, &num);
1209         if (ret)
1210                 goto end;
1211
1212         opts->iso_qlen = num;
1213         ret = len;
1214 end:
1215         mutex_unlock(&opts->lock);
1216         return ret;
1217 }
1218
1219 CONFIGFS_ATTR(f_ss_opts_, iso_qlen);
1220
1221 static struct configfs_attribute *ss_attrs[] = {
1222         &f_ss_opts_attr_pattern,
1223         &f_ss_opts_attr_isoc_interval,
1224         &f_ss_opts_attr_isoc_maxpacket,
1225         &f_ss_opts_attr_isoc_mult,
1226         &f_ss_opts_attr_isoc_maxburst,
1227         &f_ss_opts_attr_bulk_buflen,
1228         &f_ss_opts_attr_bulk_qlen,
1229         &f_ss_opts_attr_iso_qlen,
1230         NULL,
1231 };
1232
1233 static struct config_item_type ss_func_type = {
1234         .ct_item_ops    = &ss_item_ops,
1235         .ct_attrs       = ss_attrs,
1236         .ct_owner       = THIS_MODULE,
1237 };
1238
1239 static void source_sink_free_instance(struct usb_function_instance *fi)
1240 {
1241         struct f_ss_opts *ss_opts;
1242
1243         ss_opts = container_of(fi, struct f_ss_opts, func_inst);
1244         kfree(ss_opts);
1245 }
1246
1247 static struct usb_function_instance *source_sink_alloc_inst(void)
1248 {
1249         struct f_ss_opts *ss_opts;
1250
1251         ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
1252         if (!ss_opts)
1253                 return ERR_PTR(-ENOMEM);
1254         mutex_init(&ss_opts->lock);
1255         ss_opts->func_inst.free_func_inst = source_sink_free_instance;
1256         ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
1257         ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
1258         ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
1259         ss_opts->bulk_qlen = GZERO_SS_BULK_QLEN;
1260         ss_opts->iso_qlen = GZERO_SS_ISO_QLEN;
1261
1262         config_group_init_type_name(&ss_opts->func_inst.group, "",
1263                                     &ss_func_type);
1264
1265         return &ss_opts->func_inst;
1266 }
1267 DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
1268                 source_sink_alloc_func);
1269
1270 static int __init sslb_modinit(void)
1271 {
1272         int ret;
1273
1274         ret = usb_function_register(&SourceSinkusb_func);
1275         if (ret)
1276                 return ret;
1277         ret = lb_modinit();
1278         if (ret)
1279                 usb_function_unregister(&SourceSinkusb_func);
1280         return ret;
1281 }
1282 static void __exit sslb_modexit(void)
1283 {
1284         usb_function_unregister(&SourceSinkusb_func);
1285         lb_modexit();
1286 }
1287 module_init(sslb_modinit);
1288 module_exit(sslb_modexit);
1289
1290 MODULE_LICENSE("GPL");