drivers/usb/host/hwa-hc.c

   1 /*
   2  * Host Wire Adapter:
   3  * Driver glue, HWA-specific functions, bridges to WAHC and WUSBHC
   4  *
   5  * Copyright (C) 2005-2006 Intel Corporation
   6  * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License version
  10  * 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  * 02110-1301, USA.
  21  *
  22  *
  23  * The HWA driver is a simple layer that forwards requests to the WAHC
  24  * (Wire Adater Host Controller) or WUSBHC (Wireless USB Host
  25  * Controller) layers.
  26  *
  27  * Host Wire Adapter is the 'WUSB 1.0 standard' name for Wireless-USB
  28  * Host Controller that is connected to your system via USB (a USB
  29  * dongle that implements a USB host...). There is also a Device Wired
  30  * Adaptor, DWA (Wireless USB hub) that uses the same mechanism for
  31  * transferring data (it is after all a USB host connected via
  32  * Wireless USB), we have a common layer called Wire Adapter Host
  33  * Controller that does all the hard work. The WUSBHC (Wireless USB
  34  * Host Controller) is the part common to WUSB Host Controllers, the
  35  * HWA and the PCI-based one, that is implemented following the WHCI
  36  * spec. All these layers are implemented in ../wusbcore.
  37  *
  38  * The main functions are hwahc_op_urb_{en,de}queue(), that pass the
  39  * job of converting a URB to a Wire Adapter
  40  *
  41  * Entry points:
  42  *
  43  *   hwahc_driver_*()   Driver initialization, registration and
  44  *                      teardown.
  45  *
  46  *   hwahc_probe()      New device came up, create an instance for
  47  *                      it [from device enumeration].
  48  *
  49  *   hwahc_disconnect() Remove device instance [from device
  50  *                      enumeration].
  51  *
  52  *   [__]hwahc_op_*()   Host-Wire-Adaptor specific functions for
  53  *                      starting/stopping/etc (some might be made also
  54  *                      DWA).
  55  */
  56 #include <linux/kernel.h>
  57 #include <linux/init.h>
  58 #include <linux/slab.h>
  59 #include <linux/module.h>
  60 #include <linux/workqueue.h>
  61 #include <linux/wait.h>
  62 #include <linux/completion.h>
  63 #include "../wusbcore/wa-hc.h"
  64 #include "../wusbcore/wusbhc.h"
  65
  66 struct hwahc {
  67         struct wusbhc wusbhc;   /* has to be 1st */
  68         struct wahc wa;
  69 };
  70
  71 /*
  72  * FIXME should be wusbhc
  73  *
  74  * NOTE: we need to cache the Cluster ID because later...there is no
  75  *       way to get it :)
  76  */
  77 static int __hwahc_set_cluster_id(struct hwahc *hwahc, u8 cluster_id)
  78 {
  79         int result;
  80         struct wusbhc *wusbhc = &hwahc->wusbhc;
  81         struct wahc *wa = &hwahc->wa;
  82         struct device *dev = &wa->usb_iface->dev;
  83
  84         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
  85                         WUSB_REQ_SET_CLUSTER_ID,
  86                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  87                         cluster_id,
  88                         wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
  89                         NULL, 0, 1000 /* FIXME: arbitrary */);
  90         if (result < 0)
  91                 dev_err(dev, "Cannot set WUSB Cluster ID to 0x%02x: %d\n",
  92                         cluster_id, result);
  93         else
  94                 wusbhc->cluster_id = cluster_id;
  95         dev_info(dev, "Wireless USB Cluster ID set to 0x%02x\n", cluster_id);
  96         return result;
  97 }
  98
  99 static int __hwahc_op_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
 100 {
 101         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 102         struct wahc *wa = &hwahc->wa;
 103
 104         return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 105                         WUSB_REQ_SET_NUM_DNTS,
 106                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 107                         interval << 8 | slots,
 108                         wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
 109                         NULL, 0, 1000 /* FIXME: arbitrary */);
 110 }
 111
 112 /*
 113  * Reset a WUSB host controller and wait for it to complete doing it.
 114  *
 115  * @usb_hcd:    Pointer to WUSB Host Controller instance.
 116  *
 117  */
 118 static int hwahc_op_reset(struct usb_hcd *usb_hcd)
 119 {
 120         int result;
 121         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 122         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 123         struct device *dev = &hwahc->wa.usb_iface->dev;
 124
 125         mutex_lock(&wusbhc->mutex);
 126         wa_nep_disarm(&hwahc->wa);
 127         result = __wa_set_feature(&hwahc->wa, WA_RESET);
 128         if (result < 0) {
 129                 dev_err(dev, "error commanding HC to reset: %d\n", result);
 130                 goto error_unlock;
 131         }
 132         result = __wa_wait_status(&hwahc->wa, WA_STATUS_RESETTING, 0);
 133         if (result < 0) {
 134                 dev_err(dev, "error waiting for HC to reset: %d\n", result);
 135                 goto error_unlock;
 136         }
 137 error_unlock:
 138         mutex_unlock(&wusbhc->mutex);
 139         return result;
 140 }
 141
 142 /*
 143  * FIXME: break this function up
 144  */
 145 static int hwahc_op_start(struct usb_hcd *usb_hcd)
 146 {
 147         u8 addr;
 148         int result;
 149         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 150         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 151
 152         result = -ENOSPC;
 153         mutex_lock(&wusbhc->mutex);
 154         addr = wusb_cluster_id_get();
 155         if (addr == 0)
 156                 goto error_cluster_id_get;
 157         result = __hwahc_set_cluster_id(hwahc, addr);
 158         if (result < 0)
 159                 goto error_set_cluster_id;
 160
 161         usb_hcd->uses_new_polling = 1;
 162         set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags);
 163         usb_hcd->state = HC_STATE_RUNNING;
 164
 165         /*
 166          * prevent USB core from suspending the root hub since
 167          * bus_suspend and bus_resume are not yet supported.
 168          */
 169         pm_runtime_get_noresume(&usb_hcd->self.root_hub->dev);
 170
 171         result = 0;
 172 out:
 173         mutex_unlock(&wusbhc->mutex);
 174         return result;
 175
 176 error_set_cluster_id:
 177         wusb_cluster_id_put(wusbhc->cluster_id);
 178 error_cluster_id_get:
 179         goto out;
 180
 181 }
 182
 183 /*
 184  * No need to abort pipes, as when this is called, all the children
 185  * has been disconnected and that has done it [through
 186  * usb_disable_interface() -> usb_disable_endpoint() ->
 187  * hwahc_op_ep_disable() - >rpipe_ep_disable()].
 188  */
 189 static void hwahc_op_stop(struct usb_hcd *usb_hcd)
 190 {
 191         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 192
 193         mutex_lock(&wusbhc->mutex);
 194         wusb_cluster_id_put(wusbhc->cluster_id);
 195         mutex_unlock(&wusbhc->mutex);
 196 }
 197
 198 static int hwahc_op_get_frame_number(struct usb_hcd *usb_hcd)
 199 {
 200         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 201         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 202
 203         dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
 204                 usb_hcd, hwahc);
 205         return -ENOSYS;
 206 }
 207
 208 static int hwahc_op_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
 209                                 gfp_t gfp)
 210 {
 211         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 212         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 213
 214         return wa_urb_enqueue(&hwahc->wa, urb->ep, urb, gfp);
 215 }
 216
 217 static int hwahc_op_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb,
 218                                 int status)
 219 {
 220         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 221         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 222
 223         return wa_urb_dequeue(&hwahc->wa, urb);
 224 }
 225
 226 /*
 227  * Release resources allocated for an endpoint
 228  *
 229  * If there is an associated rpipe to this endpoint, go ahead and put it.
 230  */
 231 static void hwahc_op_endpoint_disable(struct usb_hcd *usb_hcd,
 232                                       struct usb_host_endpoint *ep)
 233 {
 234         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 235         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 236
 237         rpipe_ep_disable(&hwahc->wa, ep);
 238 }
 239
 240 static int __hwahc_op_wusbhc_start(struct wusbhc *wusbhc)
 241 {
 242         int result;
 243         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 244         struct device *dev = &hwahc->wa.usb_iface->dev;
 245
 246         result = __wa_set_feature(&hwahc->wa, WA_ENABLE);
 247         if (result < 0) {
 248                 dev_err(dev, "error commanding HC to start: %d\n", result);
 249                 goto error_stop;
 250         }
 251         result = __wa_wait_status(&hwahc->wa, WA_ENABLE, WA_ENABLE);
 252         if (result < 0) {
 253                 dev_err(dev, "error waiting for HC to start: %d\n", result);
 254                 goto error_stop;
 255         }
 256         result = wa_nep_arm(&hwahc->wa, GFP_KERNEL);
 257         if (result < 0) {
 258                 dev_err(dev, "cannot listen to notifications: %d\n", result);
 259                 goto error_stop;
 260         }
 261         return result;
 262
 263 error_stop:
 264         __wa_clear_feature(&hwahc->wa, WA_ENABLE);
 265         return result;
 266 }
 267
 268 static void __hwahc_op_wusbhc_stop(struct wusbhc *wusbhc, int delay)
 269 {
 270         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 271         struct wahc *wa = &hwahc->wa;
 272         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 273         int ret;
 274
 275         ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 276                               WUSB_REQ_CHAN_STOP,
 277                               USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 278                               delay * 1000,
 279                               iface_no,
 280                               NULL, 0, 1000 /* FIXME: arbitrary */);
 281         if (ret == 0)
 282                 msleep(delay);
 283
 284         wa_nep_disarm(&hwahc->wa);
 285         __wa_stop(&hwahc->wa);
 286 }
 287
 288 /*
 289  * Set the UWB MAS allocation for the WUSB cluster
 290  *
 291  * @stream_index: stream to use (-1 for cancelling the allocation)
 292  * @mas: mas bitmap to use
 293  */
 294 static int __hwahc_op_bwa_set(struct wusbhc *wusbhc, s8 stream_index,
 295                               const struct uwb_mas_bm *mas)
 296 {
 297         int result;
 298         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 299         struct wahc *wa = &hwahc->wa;
 300         struct device *dev = &wa->usb_iface->dev;
 301         u8 mas_le[UWB_NUM_MAS/8];
 302
 303         /* Set the stream index */
 304         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 305                         WUSB_REQ_SET_STREAM_IDX,
 306                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 307                         stream_index,
 308                         wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
 309                         NULL, 0, 1000 /* FIXME: arbitrary */);
 310         if (result < 0) {
 311                 dev_err(dev, "Cannot set WUSB stream index: %d\n", result);
 312                 goto out;
 313         }
 314         uwb_mas_bm_copy_le(mas_le, mas);
 315         /* Set the MAS allocation */
 316         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 317                         WUSB_REQ_SET_WUSB_MAS,
 318                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 319                         0, wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
 320                         mas_le, 32, 1000 /* FIXME: arbitrary */);
 321         if (result < 0)
 322                 dev_err(dev, "Cannot set WUSB MAS allocation: %d\n", result);
 323 out:
 324         return result;
 325 }
 326
 327 /*
 328  * Add an IE to the host's MMC
 329  *
 330  * @interval:    See WUSB1.0[8.5.3.1]
 331  * @repeat_cnt:  See WUSB1.0[8.5.3.1]
 332  * @handle:      See WUSB1.0[8.5.3.1]
 333  * @wuie:        Pointer to the header of the WUSB IE data to add.
 334  *               MUST BE allocated in a kmalloc buffer (no stack or
 335  *               vmalloc).
 336  *
 337  * NOTE: the format of the WUSB IEs for MMCs are different to the
 338  *       normal MBOA MAC IEs (IE Id + Length in MBOA MAC vs. Length +
 339  *       Id in WUSB IEs). Standards...you gotta love'em.
 340  */
 341 static int __hwahc_op_mmcie_add(struct wusbhc *wusbhc, u8 interval,
 342                                 u8 repeat_cnt, u8 handle,
 343                                 struct wuie_hdr *wuie)
 344 {
 345         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 346         struct wahc *wa = &hwahc->wa;
 347         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 348
 349         return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 350                         WUSB_REQ_ADD_MMC_IE,
 351                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 352                         interval << 8 | repeat_cnt,
 353                         handle << 8 | iface_no,
 354                         wuie, wuie->bLength, 1000 /* FIXME: arbitrary */);
 355 }
 356
 357 /*
 358  * Remove an IE to the host's MMC
 359  *
 360  * @handle:      See WUSB1.0[8.5.3.1]
 361  */
 362 static int __hwahc_op_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
 363 {
 364         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 365         struct wahc *wa = &hwahc->wa;
 366         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 367         return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 368                         WUSB_REQ_REMOVE_MMC_IE,
 369                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 370                         0, handle << 8 | iface_no,
 371                         NULL, 0, 1000 /* FIXME: arbitrary */);
 372 }
 373
 374 /*
 375  * Update device information for a given fake port
 376  *
 377  * @port_idx: Fake port to which device is connected (wusbhc index, not
 378  *            USB port number).
 379  */
 380 static int __hwahc_op_dev_info_set(struct wusbhc *wusbhc,
 381                                    struct wusb_dev *wusb_dev)
 382 {
 383         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 384         struct wahc *wa = &hwahc->wa;
 385         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 386         struct hwa_dev_info *dev_info;
 387         int ret;
 388
 389         /* fill out the Device Info buffer and send it */
 390         dev_info = kzalloc(sizeof(struct hwa_dev_info), GFP_KERNEL);
 391         if (!dev_info)
 392                 return -ENOMEM;
 393         uwb_mas_bm_copy_le(dev_info->bmDeviceAvailability,
 394                            &wusb_dev->availability);
 395         dev_info->bDeviceAddress = wusb_dev->addr;
 396
 397         /*
 398          * If the descriptors haven't been read yet, use a default PHY
 399          * rate of 53.3 Mbit/s only.  The correct value will be used
 400          * when this will be called again as part of the
 401          * authentication process (which occurs after the descriptors
 402          * have been read).
 403          */
 404         if (wusb_dev->wusb_cap_descr)
 405                 dev_info->wPHYRates = wusb_dev->wusb_cap_descr->wPHYRates;
 406         else
 407                 dev_info->wPHYRates = cpu_to_le16(USB_WIRELESS_PHY_53);
 408
 409         ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 410                         WUSB_REQ_SET_DEV_INFO,
 411                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 412                         0, wusb_dev->port_idx << 8 | iface_no,
 413                         dev_info, sizeof(struct hwa_dev_info),
 414                         1000 /* FIXME: arbitrary */);
 415         kfree(dev_info);
 416         return ret;
 417 }
 418
 419 /*
 420  * Set host's idea of which encryption (and key) method to use when
 421  * talking to ad evice on a given port.
 422  *
 423  * If key is NULL, it means disable encryption for that "virtual port"
 424  * (used when we disconnect).
 425  */
 426 static int __hwahc_dev_set_key(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
 427                                const void *key, size_t key_size,
 428                                u8 key_idx)
 429 {
 430         int result = -ENOMEM;
 431         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 432         struct wahc *wa = &hwahc->wa;
 433         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 434         struct usb_key_descriptor *keyd;
 435         size_t keyd_len;
 436
 437         keyd_len = sizeof(*keyd) + key_size;
 438         keyd = kzalloc(keyd_len, GFP_KERNEL);
 439         if (keyd == NULL)
 440                 return -ENOMEM;
 441
 442         keyd->bLength = keyd_len;
 443         keyd->bDescriptorType = USB_DT_KEY;
 444         keyd->tTKID[0] = (tkid >>  0) & 0xff;
 445         keyd->tTKID[1] = (tkid >>  8) & 0xff;
 446         keyd->tTKID[2] = (tkid >> 16) & 0xff;
 447         memcpy(keyd->bKeyData, key, key_size);
 448
 449         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 450                         USB_REQ_SET_DESCRIPTOR,
 451                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 452                         USB_DT_KEY << 8 | key_idx,
 453                         port_idx << 8 | iface_no,
 454                         keyd, keyd_len, 1000 /* FIXME: arbitrary */);
 455
 456         kzfree(keyd); /* clear keys etc. */
 457         return result;
 458 }
 459
 460 /*
 461  * Set host's idea of which encryption (and key) method to use when
 462  * talking to ad evice on a given port.
 463  *
 464  * If key is NULL, it means disable encryption for that "virtual port"
 465  * (used when we disconnect).
 466  */
 467 static int __hwahc_op_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
 468                               const void *key, size_t key_size)
 469 {
 470         int result = -ENOMEM;
 471         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 472         struct wahc *wa = &hwahc->wa;
 473         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 474         u8 encryption_value;
 475
 476         /* Tell the host which key to use to talk to the device */
 477         if (key) {
 478                 u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_PTK,
 479                                             WUSB_KEY_INDEX_ORIGINATOR_HOST);
 480
 481                 result = __hwahc_dev_set_key(wusbhc, port_idx, tkid,
 482                                              key, key_size, key_idx);
 483                 if (result < 0)
 484                         goto error_set_key;
 485                 encryption_value = wusbhc->ccm1_etd->bEncryptionValue;
 486         } else {
 487                 /* FIXME: this should come from wusbhc->etd[UNSECURE].value */
 488                 encryption_value = 0;
 489         }
 490
 491         /* Set the encryption type for communicating with the device */
 492         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 493                         USB_REQ_SET_ENCRYPTION,
 494                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 495                         encryption_value, port_idx << 8 | iface_no,
 496                         NULL, 0, 1000 /* FIXME: arbitrary */);
 497         if (result < 0)
 498                 dev_err(wusbhc->dev, "Can't set host's WUSB encryption for "
 499                         "port index %u to %s (value %d): %d\n", port_idx,
 500                         wusb_et_name(wusbhc->ccm1_etd->bEncryptionType),
 501                         wusbhc->ccm1_etd->bEncryptionValue, result);
 502 error_set_key:
 503         return result;
 504 }
 505
 506 /*
 507  * Set host's GTK key
 508  */
 509 static int __hwahc_op_set_gtk(struct wusbhc *wusbhc, u32 tkid,
 510                               const void *key, size_t key_size)
 511 {
 512         u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_GTK,
 513                                     WUSB_KEY_INDEX_ORIGINATOR_HOST);
 514
 515         return __hwahc_dev_set_key(wusbhc, 0, tkid, key, key_size, key_idx);
 516 }
 517
 518 /*
 519  * Get the Wire Adapter class-specific descriptor
 520  *
 521  * NOTE: this descriptor comes with the big bundled configuration
 522  *       descriptor that includes the interfaces' and endpoints', so
 523  *       we just look for it in the cached copy kept by the USB stack.
 524  *
 525  * NOTE2: We convert LE fields to CPU order.
 526  */
 527 static int wa_fill_descr(struct wahc *wa)
 528 {
 529         int result;
 530         struct device *dev = &wa->usb_iface->dev;
 531         char *itr;
 532         struct usb_device *usb_dev = wa->usb_dev;
 533         struct usb_descriptor_header *hdr;
 534         struct usb_wa_descriptor *wa_descr;
 535         size_t itr_size, actconfig_idx;
 536
 537         actconfig_idx = (usb_dev->actconfig - usb_dev->config) /
 538                         sizeof(usb_dev->config[0]);
 539         itr = usb_dev->rawdescriptors[actconfig_idx];
 540         itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
 541         while (itr_size >= sizeof(*hdr)) {
 542                 hdr = (struct usb_descriptor_header *) itr;
 543                 dev_dbg(dev, "Extra device descriptor: "
 544                         "type %02x/%u bytes @ %zu (%zu left)\n",
 545                         hdr->bDescriptorType, hdr->bLength,
 546                         (itr - usb_dev->rawdescriptors[actconfig_idx]),
 547                         itr_size);
 548                 if (hdr->bDescriptorType == USB_DT_WIRE_ADAPTER)
 549                         goto found;
 550                 itr += hdr->bLength;
 551                 itr_size -= hdr->bLength;
 552         }
 553         dev_err(dev, "cannot find Wire Adapter Class descriptor\n");
 554         return -ENODEV;
 555
 556 found:
 557         result = -EINVAL;
 558         if (hdr->bLength > itr_size) {  /* is it available? */
 559                 dev_err(dev, "incomplete Wire Adapter Class descriptor "
 560                         "(%zu bytes left, %u needed)\n",
 561                         itr_size, hdr->bLength);
 562                 goto error;
 563         }
 564         if (hdr->bLength < sizeof(*wa->wa_descr)) {
 565                 dev_err(dev, "short Wire Adapter Class descriptor\n");
 566                 goto error;
 567         }
 568         wa->wa_descr = wa_descr = (struct usb_wa_descriptor *) hdr;
 569         /* Make LE fields CPU order */
 570         wa_descr->bcdWAVersion = le16_to_cpu(wa_descr->bcdWAVersion);
 571         wa_descr->wNumRPipes = le16_to_cpu(wa_descr->wNumRPipes);
 572         wa_descr->wRPipeMaxBlock = le16_to_cpu(wa_descr->wRPipeMaxBlock);
 573         if (wa_descr->bcdWAVersion > 0x0100)
 574                 dev_warn(dev, "Wire Adapter v%d.%d newer than groked v1.0\n",
 575                          wa_descr->bcdWAVersion & 0xff00 >> 8,
 576                          wa_descr->bcdWAVersion & 0x00ff);
 577         result = 0;
 578 error:
 579         return result;
 580 }
 581
 582 static struct hc_driver hwahc_hc_driver = {
 583         .description = "hwa-hcd",
 584         .product_desc = "Wireless USB HWA host controller",
 585         .hcd_priv_size = sizeof(struct hwahc) - sizeof(struct usb_hcd),
 586         .irq = NULL,                    /* FIXME */
 587         .flags = HCD_USB25,
 588         .reset = hwahc_op_reset,
 589         .start = hwahc_op_start,
 590         .stop = hwahc_op_stop,
 591         .get_frame_number = hwahc_op_get_frame_number,
 592         .urb_enqueue = hwahc_op_urb_enqueue,
 593         .urb_dequeue = hwahc_op_urb_dequeue,
 594         .endpoint_disable = hwahc_op_endpoint_disable,
 595
 596         .hub_status_data = wusbhc_rh_status_data,
 597         .hub_control = wusbhc_rh_control,
 598         .start_port_reset = wusbhc_rh_start_port_reset,
 599 };
 600
 601 static int hwahc_security_create(struct hwahc *hwahc)
 602 {
 603         int result;
 604         struct wusbhc *wusbhc = &hwahc->wusbhc;
 605         struct usb_device *usb_dev = hwahc->wa.usb_dev;
 606         struct device *dev = &usb_dev->dev;
 607         struct usb_security_descriptor *secd;
 608         struct usb_encryption_descriptor *etd;
 609         void *itr, *top;
 610         size_t itr_size, needed, bytes;
 611         u8 index;
 612         char buf[64];
 613
 614         /* Find the host's security descriptors in the config descr bundle */
 615         index = (usb_dev->actconfig - usb_dev->config) /
 616                 sizeof(usb_dev->config[0]);
 617         itr = usb_dev->rawdescriptors[index];
 618         itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
 619         top = itr + itr_size;
 620         result = __usb_get_extra_descriptor(usb_dev->rawdescriptors[index],
 621                         le16_to_cpu(usb_dev->actconfig->desc.wTotalLength),
 622                         USB_DT_SECURITY, (void **) &secd);
 623         if (result == -1) {
 624                 dev_warn(dev, "BUG? WUSB host has no security descriptors\n");
 625                 return 0;
 626         }
 627         needed = sizeof(*secd);
 628         if (top - (void *)secd < needed) {
 629                 dev_err(dev, "BUG? Not enough data to process security "
 630                         "descriptor header (%zu bytes left vs %zu needed)\n",
 631                         top - (void *) secd, needed);
 632                 return 0;
 633         }
 634         needed = le16_to_cpu(secd->wTotalLength);
 635         if (top - (void *)secd < needed) {
 636                 dev_err(dev, "BUG? Not enough data to process security "
 637                         "descriptors (%zu bytes left vs %zu needed)\n",
 638                         top - (void *) secd, needed);
 639                 return 0;
 640         }
 641         /* Walk over the sec descriptors and store CCM1's on wusbhc */
 642         itr = (void *) secd + sizeof(*secd);
 643         top = (void *) secd + le16_to_cpu(secd->wTotalLength);
 644         index = 0;
 645         bytes = 0;
 646         while (itr < top) {
 647                 etd = itr;
 648                 if (top - itr < sizeof(*etd)) {
 649                         dev_err(dev, "BUG: bad host security descriptor; "
 650                                 "not enough data (%zu vs %zu left)\n",
 651                                 top - itr, sizeof(*etd));
 652                         break;
 653                 }
 654                 if (etd->bLength < sizeof(*etd)) {
 655                         dev_err(dev, "BUG: bad host encryption descriptor; "
 656                                 "descriptor is too short "
 657                                 "(%zu vs %zu needed)\n",
 658                                 (size_t)etd->bLength, sizeof(*etd));
 659                         break;
 660                 }
 661                 itr += etd->bLength;
 662                 bytes += snprintf(buf + bytes, sizeof(buf) - bytes,
 663                                   "%s (0x%02x) ",
 664                                   wusb_et_name(etd->bEncryptionType),
 665                                   etd->bEncryptionValue);
 666                 wusbhc->ccm1_etd = etd;
 667         }
 668         dev_info(dev, "supported encryption types: %s\n", buf);
 669         if (wusbhc->ccm1_etd == NULL) {
 670                 dev_err(dev, "E: host doesn't support CCM-1 crypto\n");
 671                 return 0;
 672         }
 673         /* Pretty print what we support */
 674         return 0;
 675 }
 676
 677 static void hwahc_security_release(struct hwahc *hwahc)
 678 {
 679         /* nothing to do here so far... */
 680 }
 681
 682 static int hwahc_create(struct hwahc *hwahc, struct usb_interface *iface)
 683 {
 684         int result;
 685         struct device *dev = &iface->dev;
 686         struct wusbhc *wusbhc = &hwahc->wusbhc;
 687         struct wahc *wa = &hwahc->wa;
 688         struct usb_device *usb_dev = interface_to_usbdev(iface);
 689
 690         wa->usb_dev = usb_get_dev(usb_dev);     /* bind the USB device */
 691         wa->usb_iface = usb_get_intf(iface);
 692         wusbhc->dev = dev;
 693         /* defer getting the uwb_rc handle until it is needed since it
 694          * may not have been registered by the hwa_rc driver yet. */
 695         wusbhc->uwb_rc = NULL;
 696         result = wa_fill_descr(wa);     /* Get the device descriptor */
 697         if (result < 0)
 698                 goto error_fill_descriptor;
 699         if (wa->wa_descr->bNumPorts > USB_MAXCHILDREN) {
 700                 dev_err(dev, "FIXME: USB_MAXCHILDREN too low for WUSB "
 701                         "adapter (%u ports)\n", wa->wa_descr->bNumPorts);
 702                 wusbhc->ports_max = USB_MAXCHILDREN;
 703         } else {
 704                 wusbhc->ports_max = wa->wa_descr->bNumPorts;
 705         }
 706         wusbhc->mmcies_max = wa->wa_descr->bNumMMCIEs;
 707         wusbhc->start = __hwahc_op_wusbhc_start;
 708         wusbhc->stop = __hwahc_op_wusbhc_stop;
 709         wusbhc->mmcie_add = __hwahc_op_mmcie_add;
 710         wusbhc->mmcie_rm = __hwahc_op_mmcie_rm;
 711         wusbhc->dev_info_set = __hwahc_op_dev_info_set;
 712         wusbhc->bwa_set = __hwahc_op_bwa_set;
 713         wusbhc->set_num_dnts = __hwahc_op_set_num_dnts;
 714         wusbhc->set_ptk = __hwahc_op_set_ptk;
 715         wusbhc->set_gtk = __hwahc_op_set_gtk;
 716         result = hwahc_security_create(hwahc);
 717         if (result < 0) {
 718                 dev_err(dev, "Can't initialize security: %d\n", result);
 719                 goto error_security_create;
 720         }
 721         wa->wusb = wusbhc;      /* FIXME: ugly, need to fix */
 722         result = wusbhc_create(&hwahc->wusbhc);
 723         if (result < 0) {
 724                 dev_err(dev, "Can't create WUSB HC structures: %d\n", result);
 725                 goto error_wusbhc_create;
 726         }
 727         result = wa_create(&hwahc->wa, iface);
 728         if (result < 0)
 729                 goto error_wa_create;
 730         return 0;
 731
 732 error_wa_create:
 733         wusbhc_destroy(&hwahc->wusbhc);
 734 error_wusbhc_create:
 735         /* WA Descr fill allocs no resources */
 736 error_security_create:
 737 error_fill_descriptor:
 738         usb_put_intf(iface);
 739         usb_put_dev(usb_dev);
 740         return result;
 741 }
 742
 743 static void hwahc_destroy(struct hwahc *hwahc)
 744 {
 745         struct wusbhc *wusbhc = &hwahc->wusbhc;
 746
 747         mutex_lock(&wusbhc->mutex);
 748         __wa_destroy(&hwahc->wa);
 749         wusbhc_destroy(&hwahc->wusbhc);
 750         hwahc_security_release(hwahc);
 751         hwahc->wusbhc.dev = NULL;
 752         uwb_rc_put(wusbhc->uwb_rc);
 753         usb_put_intf(hwahc->wa.usb_iface);
 754         usb_put_dev(hwahc->wa.usb_dev);
 755         mutex_unlock(&wusbhc->mutex);
 756 }
 757
 758 static void hwahc_init(struct hwahc *hwahc)
 759 {
 760         wa_init(&hwahc->wa);
 761 }
 762
 763 static int hwahc_probe(struct usb_interface *usb_iface,
 764                        const struct usb_device_id *id)
 765 {
 766         int result;
 767         struct usb_hcd *usb_hcd;
 768         struct wusbhc *wusbhc;
 769         struct hwahc *hwahc;
 770         struct device *dev = &usb_iface->dev;
 771
 772         result = -ENOMEM;
 773         usb_hcd = usb_create_hcd(&hwahc_hc_driver, &usb_iface->dev, "wusb-hwa");
 774         if (usb_hcd == NULL) {
 775                 dev_err(dev, "unable to allocate instance\n");
 776                 goto error_alloc;
 777         }
 778         usb_hcd->wireless = 1;
 779         usb_hcd->self.sg_tablesize = ~0;
 780         wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 781         hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 782         hwahc_init(hwahc);
 783         result = hwahc_create(hwahc, usb_iface);
 784         if (result < 0) {
 785                 dev_err(dev, "Cannot initialize internals: %d\n", result);
 786                 goto error_hwahc_create;
 787         }
 788         result = usb_add_hcd(usb_hcd, 0, 0);
 789         if (result < 0) {
 790                 dev_err(dev, "Cannot add HCD: %d\n", result);
 791                 goto error_add_hcd;
 792         }
 793         result = wusbhc_b_create(&hwahc->wusbhc);
 794         if (result < 0) {
 795                 dev_err(dev, "Cannot setup phase B of WUSBHC: %d\n", result);
 796                 goto error_wusbhc_b_create;
 797         }
 798         return 0;
 799
 800 error_wusbhc_b_create:
 801         usb_remove_hcd(usb_hcd);
 802 error_add_hcd:
 803         hwahc_destroy(hwahc);
 804 error_hwahc_create:
 805         usb_put_hcd(usb_hcd);
 806 error_alloc:
 807         return result;
 808 }
 809
 810 static void hwahc_disconnect(struct usb_interface *usb_iface)
 811 {
 812         struct usb_hcd *usb_hcd;
 813         struct wusbhc *wusbhc;
 814         struct hwahc *hwahc;
 815
 816         usb_hcd = usb_get_intfdata(usb_iface);
 817         wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 818         hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 819
 820         wusbhc_b_destroy(&hwahc->wusbhc);
 821         usb_remove_hcd(usb_hcd);
 822         hwahc_destroy(hwahc);
 823         usb_put_hcd(usb_hcd);
 824 }
 825
 826 static struct usb_device_id hwahc_id_table[] = {
 827         /* FIXME: use class labels for this */
 828         { USB_INTERFACE_INFO(0xe0, 0x02, 0x01), },
 829         {},
 830 };
 831 MODULE_DEVICE_TABLE(usb, hwahc_id_table);
 832
 833 static struct usb_driver hwahc_driver = {
 834         .name =         "hwa-hc",
 835         .probe =        hwahc_probe,
 836         .disconnect =   hwahc_disconnect,
 837         .id_table =     hwahc_id_table,
 838 };
 839
 840 module_usb_driver(hwahc_driver);
 841
 842 MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
 843 MODULE_DESCRIPTION("Host Wired Adapter USB Host Control Driver");
 844 MODULE_LICENSE("GPL");