git.oblomov.eu Git - linux-2.6/blob - 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/module.h>
  59 #include <linux/workqueue.h>
  60 #include <linux/wait.h>
  61 #include <linux/completion.h>
  62 #include "../wusbcore/wa-hc.h"
  63 #include "../wusbcore/wusbhc.h"
  64
  65 struct hwahc {
  66         struct wusbhc wusbhc;   /* has to be 1st */
  67         struct wahc wa;
  68 };
  69
  70 /*
  71  * FIXME should be wusbhc
  72  *
  73  * NOTE: we need to cache the Cluster ID because later...there is no
  74  *       way to get it :)
  75  */
  76 static int __hwahc_set_cluster_id(struct hwahc *hwahc, u8 cluster_id)
  77 {
  78         int result;
  79         struct wusbhc *wusbhc = &hwahc->wusbhc;
  80         struct wahc *wa = &hwahc->wa;
  81         struct device *dev = &wa->usb_iface->dev;
  82
  83         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
  84                         WUSB_REQ_SET_CLUSTER_ID,
  85                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  86                         cluster_id,
  87                         wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
  88                         NULL, 0, 1000 /* FIXME: arbitrary */);
  89         if (result < 0)
  90                 dev_err(dev, "Cannot set WUSB Cluster ID to 0x%02x: %d\n",
  91                         cluster_id, result);
  92         else
  93                 wusbhc->cluster_id = cluster_id;
  94         dev_info(dev, "Wireless USB Cluster ID set to 0x%02x\n", cluster_id);
  95         return result;
  96 }
  97
  98 static int __hwahc_op_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
  99 {
 100         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 101         struct wahc *wa = &hwahc->wa;
 102
 103         return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 104                         WUSB_REQ_SET_NUM_DNTS,
 105                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 106                         interval << 8 | slots,
 107                         wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
 108                         NULL, 0, 1000 /* FIXME: arbitrary */);
 109 }
 110
 111 /*
 112  * Reset a WUSB host controller and wait for it to complete doing it.
 113  *
 114  * @usb_hcd:    Pointer to WUSB Host Controller instance.
 115  *
 116  */
 117 static int hwahc_op_reset(struct usb_hcd *usb_hcd)
 118 {
 119         int result;
 120         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 121         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 122         struct device *dev = &hwahc->wa.usb_iface->dev;
 123
 124         mutex_lock(&wusbhc->mutex);
 125         wa_nep_disarm(&hwahc->wa);
 126         result = __wa_set_feature(&hwahc->wa, WA_RESET);
 127         if (result < 0) {
 128                 dev_err(dev, "error commanding HC to reset: %d\n", result);
 129                 goto error_unlock;
 130         }
 131         result = __wa_wait_status(&hwahc->wa, WA_STATUS_RESETTING, 0);
 132         if (result < 0) {
 133                 dev_err(dev, "error waiting for HC to reset: %d\n", result);
 134                 goto error_unlock;
 135         }
 136 error_unlock:
 137         mutex_unlock(&wusbhc->mutex);
 138         return result;
 139 }
 140
 141 /*
 142  * FIXME: break this function up
 143  */
 144 static int hwahc_op_start(struct usb_hcd *usb_hcd)
 145 {
 146         u8 addr;
 147         int result;
 148         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 149         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 150
 151         result = -ENOSPC;
 152         mutex_lock(&wusbhc->mutex);
 153         addr = wusb_cluster_id_get();
 154         if (addr == 0)
 155                 goto error_cluster_id_get;
 156         result = __hwahc_set_cluster_id(hwahc, addr);
 157         if (result < 0)
 158                 goto error_set_cluster_id;
 159
 160         usb_hcd->uses_new_polling = 1;
 161         usb_hcd->poll_rh = 1;
 162         usb_hcd->state = HC_STATE_RUNNING;
 163         result = 0;
 164 out:
 165         mutex_unlock(&wusbhc->mutex);
 166         return result;
 167
 168 error_set_cluster_id:
 169         wusb_cluster_id_put(wusbhc->cluster_id);
 170 error_cluster_id_get:
 171         goto out;
 172
 173 }
 174
 175 static int hwahc_op_suspend(struct usb_hcd *usb_hcd, pm_message_t msg)
 176 {
 177         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 178         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 179         dev_err(wusbhc->dev, "%s (%p [%p], 0x%lx) UNIMPLEMENTED\n", __func__,
 180                 usb_hcd, hwahc, *(unsigned long *) &msg);
 181         return -ENOSYS;
 182 }
 183
 184 static int hwahc_op_resume(struct usb_hcd *usb_hcd)
 185 {
 186         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 187         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 188
 189         dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
 190                 usb_hcd, hwahc);
 191         return -ENOSYS;
 192 }
 193
 194 /*
 195  * No need to abort pipes, as when this is called, all the children
 196  * has been disconnected and that has done it [through
 197  * usb_disable_interface() -> usb_disable_endpoint() ->
 198  * hwahc_op_ep_disable() - >rpipe_ep_disable()].
 199  */
 200 static void hwahc_op_stop(struct usb_hcd *usb_hcd)
 201 {
 202         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 203
 204         mutex_lock(&wusbhc->mutex);
 205         wusb_cluster_id_put(wusbhc->cluster_id);
 206         mutex_unlock(&wusbhc->mutex);
 207 }
 208
 209 static int hwahc_op_get_frame_number(struct usb_hcd *usb_hcd)
 210 {
 211         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 212         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 213
 214         dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
 215                 usb_hcd, hwahc);
 216         return -ENOSYS;
 217 }
 218
 219 static int hwahc_op_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
 220                                 gfp_t gfp)
 221 {
 222         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 223         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 224
 225         return wa_urb_enqueue(&hwahc->wa, urb->ep, urb, gfp);
 226 }
 227
 228 static int hwahc_op_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb,
 229                                 int status)
 230 {
 231         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 232         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 233
 234         return wa_urb_dequeue(&hwahc->wa, urb);
 235 }
 236
 237 /*
 238  * Release resources allocated for an endpoint
 239  *
 240  * If there is an associated rpipe to this endpoint, go ahead and put it.
 241  */
 242 static void hwahc_op_endpoint_disable(struct usb_hcd *usb_hcd,
 243                                       struct usb_host_endpoint *ep)
 244 {
 245         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 246         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 247
 248         rpipe_ep_disable(&hwahc->wa, ep);
 249 }
 250
 251 static int __hwahc_op_wusbhc_start(struct wusbhc *wusbhc)
 252 {
 253         int result;
 254         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 255         struct device *dev = &hwahc->wa.usb_iface->dev;
 256
 257         result = __wa_set_feature(&hwahc->wa, WA_ENABLE);
 258         if (result < 0) {
 259                 dev_err(dev, "error commanding HC to start: %d\n", result);
 260                 goto error_stop;
 261         }
 262         result = __wa_wait_status(&hwahc->wa, WA_ENABLE, WA_ENABLE);
 263         if (result < 0) {
 264                 dev_err(dev, "error waiting for HC to start: %d\n", result);
 265                 goto error_stop;
 266         }
 267         result = wa_nep_arm(&hwahc->wa, GFP_KERNEL);
 268         if (result < 0) {
 269                 dev_err(dev, "cannot listen to notifications: %d\n", result);
 270                 goto error_stop;
 271         }
 272         return result;
 273
 274 error_stop:
 275         __wa_clear_feature(&hwahc->wa, WA_ENABLE);
 276         return result;
 277 }
 278
 279 static void __hwahc_op_wusbhc_stop(struct wusbhc *wusbhc, int delay)
 280 {
 281         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 282         struct wahc *wa = &hwahc->wa;
 283         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 284         int ret;
 285
 286         ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 287                               WUSB_REQ_CHAN_STOP,
 288                               USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 289                               delay * 1000,
 290                               iface_no,
 291                               NULL, 0, 1000 /* FIXME: arbitrary */);
 292         if (ret == 0)
 293                 msleep(delay);
 294
 295         wa_nep_disarm(&hwahc->wa);
 296         __wa_stop(&hwahc->wa);
 297 }
 298
 299 /*
 300  * Set the UWB MAS allocation for the WUSB cluster
 301  *
 302  * @stream_index: stream to use (-1 for cancelling the allocation)
 303  * @mas: mas bitmap to use
 304  */
 305 static int __hwahc_op_bwa_set(struct wusbhc *wusbhc, s8 stream_index,
 306                               const struct uwb_mas_bm *mas)
 307 {
 308         int result;
 309         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 310         struct wahc *wa = &hwahc->wa;
 311         struct device *dev = &wa->usb_iface->dev;
 312         u8 mas_le[UWB_NUM_MAS/8];
 313
 314         /* Set the stream index */
 315         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 316                         WUSB_REQ_SET_STREAM_IDX,
 317                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 318                         stream_index,
 319                         wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
 320                         NULL, 0, 1000 /* FIXME: arbitrary */);
 321         if (result < 0) {
 322                 dev_err(dev, "Cannot set WUSB stream index: %d\n", result);
 323                 goto out;
 324         }
 325         uwb_mas_bm_copy_le(mas_le, mas);
 326         /* Set the MAS allocation */
 327         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 328                         WUSB_REQ_SET_WUSB_MAS,
 329                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 330                         0, wa->usb_iface->cur_altsetting->desc.bInterfaceNumber,
 331                         mas_le, 32, 1000 /* FIXME: arbitrary */);
 332         if (result < 0)
 333                 dev_err(dev, "Cannot set WUSB MAS allocation: %d\n", result);
 334 out:
 335         return result;
 336 }
 337
 338 /*
 339  * Add an IE to the host's MMC
 340  *
 341  * @interval:    See WUSB1.0[8.5.3.1]
 342  * @repeat_cnt:  See WUSB1.0[8.5.3.1]
 343  * @handle:      See WUSB1.0[8.5.3.1]
 344  * @wuie:        Pointer to the header of the WUSB IE data to add.
 345  *               MUST BE allocated in a kmalloc buffer (no stack or
 346  *               vmalloc).
 347  *
 348  * NOTE: the format of the WUSB IEs for MMCs are different to the
 349  *       normal MBOA MAC IEs (IE Id + Length in MBOA MAC vs. Length +
 350  *       Id in WUSB IEs). Standards...you gotta love'em.
 351  */
 352 static int __hwahc_op_mmcie_add(struct wusbhc *wusbhc, u8 interval,
 353                                 u8 repeat_cnt, u8 handle,
 354                                 struct wuie_hdr *wuie)
 355 {
 356         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 357         struct wahc *wa = &hwahc->wa;
 358         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 359
 360         return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 361                         WUSB_REQ_ADD_MMC_IE,
 362                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 363                         interval << 8 | repeat_cnt,
 364                         handle << 8 | iface_no,
 365                         wuie, wuie->bLength, 1000 /* FIXME: arbitrary */);
 366 }
 367
 368 /*
 369  * Remove an IE to the host's MMC
 370  *
 371  * @handle:      See WUSB1.0[8.5.3.1]
 372  */
 373 static int __hwahc_op_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
 374 {
 375         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 376         struct wahc *wa = &hwahc->wa;
 377         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 378         return usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 379                         WUSB_REQ_REMOVE_MMC_IE,
 380                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 381                         0, handle << 8 | iface_no,
 382                         NULL, 0, 1000 /* FIXME: arbitrary */);
 383 }
 384
 385 /*
 386  * Update device information for a given fake port
 387  *
 388  * @port_idx: Fake port to which device is connected (wusbhc index, not
 389  *            USB port number).
 390  */
 391 static int __hwahc_op_dev_info_set(struct wusbhc *wusbhc,
 392                                    struct wusb_dev *wusb_dev)
 393 {
 394         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 395         struct wahc *wa = &hwahc->wa;
 396         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 397         struct hwa_dev_info *dev_info;
 398         int ret;
 399
 400         /* fill out the Device Info buffer and send it */
 401         dev_info = kzalloc(sizeof(struct hwa_dev_info), GFP_KERNEL);
 402         if (!dev_info)
 403                 return -ENOMEM;
 404         uwb_mas_bm_copy_le(dev_info->bmDeviceAvailability,
 405                            &wusb_dev->availability);
 406         dev_info->bDeviceAddress = wusb_dev->addr;
 407
 408         /*
 409          * If the descriptors haven't been read yet, use a default PHY
 410          * rate of 53.3 Mbit/s only.  The correct value will be used
 411          * when this will be called again as part of the
 412          * authentication process (which occurs after the descriptors
 413          * have been read).
 414          */
 415         if (wusb_dev->wusb_cap_descr)
 416                 dev_info->wPHYRates = wusb_dev->wusb_cap_descr->wPHYRates;
 417         else
 418                 dev_info->wPHYRates = cpu_to_le16(USB_WIRELESS_PHY_53);
 419
 420         ret = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 421                         WUSB_REQ_SET_DEV_INFO,
 422                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 423                         0, wusb_dev->port_idx << 8 | iface_no,
 424                         dev_info, sizeof(struct hwa_dev_info),
 425                         1000 /* FIXME: arbitrary */);
 426         kfree(dev_info);
 427         return ret;
 428 }
 429
 430 /*
 431  * Set host's idea of which encryption (and key) method to use when
 432  * talking to ad evice on a given port.
 433  *
 434  * If key is NULL, it means disable encryption for that "virtual port"
 435  * (used when we disconnect).
 436  */
 437 static int __hwahc_dev_set_key(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
 438                                const void *key, size_t key_size,
 439                                u8 key_idx)
 440 {
 441         int result = -ENOMEM;
 442         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 443         struct wahc *wa = &hwahc->wa;
 444         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 445         struct usb_key_descriptor *keyd;
 446         size_t keyd_len;
 447
 448         keyd_len = sizeof(*keyd) + key_size;
 449         keyd = kzalloc(keyd_len, GFP_KERNEL);
 450         if (keyd == NULL)
 451                 return -ENOMEM;
 452
 453         keyd->bLength = keyd_len;
 454         keyd->bDescriptorType = USB_DT_KEY;
 455         keyd->tTKID[0] = (tkid >>  0) & 0xff;
 456         keyd->tTKID[1] = (tkid >>  8) & 0xff;
 457         keyd->tTKID[2] = (tkid >> 16) & 0xff;
 458         memcpy(keyd->bKeyData, key, key_size);
 459
 460         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 461                         USB_REQ_SET_DESCRIPTOR,
 462                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 463                         USB_DT_KEY << 8 | key_idx,
 464                         port_idx << 8 | iface_no,
 465                         keyd, keyd_len, 1000 /* FIXME: arbitrary */);
 466
 467         kzfree(keyd); /* clear keys etc. */
 468         return result;
 469 }
 470
 471 /*
 472  * Set host's idea of which encryption (and key) method to use when
 473  * talking to ad evice on a given port.
 474  *
 475  * If key is NULL, it means disable encryption for that "virtual port"
 476  * (used when we disconnect).
 477  */
 478 static int __hwahc_op_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
 479                               const void *key, size_t key_size)
 480 {
 481         int result = -ENOMEM;
 482         struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 483         struct wahc *wa = &hwahc->wa;
 484         u8 iface_no = wa->usb_iface->cur_altsetting->desc.bInterfaceNumber;
 485         u8 encryption_value;
 486
 487         /* Tell the host which key to use to talk to the device */
 488         if (key) {
 489                 u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_PTK,
 490                                             WUSB_KEY_INDEX_ORIGINATOR_HOST);
 491
 492                 result = __hwahc_dev_set_key(wusbhc, port_idx, tkid,
 493                                              key, key_size, key_idx);
 494                 if (result < 0)
 495                         goto error_set_key;
 496                 encryption_value = wusbhc->ccm1_etd->bEncryptionValue;
 497         } else {
 498                 /* FIXME: this should come from wusbhc->etd[UNSECURE].value */
 499                 encryption_value = 0;
 500         }
 501
 502         /* Set the encryption type for commmunicating with the device */
 503         result = usb_control_msg(wa->usb_dev, usb_sndctrlpipe(wa->usb_dev, 0),
 504                         USB_REQ_SET_ENCRYPTION,
 505                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 506                         encryption_value, port_idx << 8 | iface_no,
 507                         NULL, 0, 1000 /* FIXME: arbitrary */);
 508         if (result < 0)
 509                 dev_err(wusbhc->dev, "Can't set host's WUSB encryption for "
 510                         "port index %u to %s (value %d): %d\n", port_idx,
 511                         wusb_et_name(wusbhc->ccm1_etd->bEncryptionType),
 512                         wusbhc->ccm1_etd->bEncryptionValue, result);
 513 error_set_key:
 514         return result;
 515 }
 516
 517 /*
 518  * Set host's GTK key
 519  */
 520 static int __hwahc_op_set_gtk(struct wusbhc *wusbhc, u32 tkid,
 521                               const void *key, size_t key_size)
 522 {
 523         u8 key_idx = wusb_key_index(0, WUSB_KEY_INDEX_TYPE_GTK,
 524                                     WUSB_KEY_INDEX_ORIGINATOR_HOST);
 525
 526         return __hwahc_dev_set_key(wusbhc, 0, tkid, key, key_size, key_idx);
 527 }
 528
 529 /*
 530  * Get the Wire Adapter class-specific descriptor
 531  *
 532  * NOTE: this descriptor comes with the big bundled configuration
 533  *       descriptor that includes the interfaces' and endpoints', so
 534  *       we just look for it in the cached copy kept by the USB stack.
 535  *
 536  * NOTE2: We convert LE fields to CPU order.
 537  */
 538 static int wa_fill_descr(struct wahc *wa)
 539 {
 540         int result;
 541         struct device *dev = &wa->usb_iface->dev;
 542         char *itr;
 543         struct usb_device *usb_dev = wa->usb_dev;
 544         struct usb_descriptor_header *hdr;
 545         struct usb_wa_descriptor *wa_descr;
 546         size_t itr_size, actconfig_idx;
 547
 548         actconfig_idx = (usb_dev->actconfig - usb_dev->config) /
 549                         sizeof(usb_dev->config[0]);
 550         itr = usb_dev->rawdescriptors[actconfig_idx];
 551         itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
 552         while (itr_size >= sizeof(*hdr)) {
 553                 hdr = (struct usb_descriptor_header *) itr;
 554                 dev_dbg(dev, "Extra device descriptor: "
 555                         "type %02x/%u bytes @ %zu (%zu left)\n",
 556                         hdr->bDescriptorType, hdr->bLength,
 557                         (itr - usb_dev->rawdescriptors[actconfig_idx]),
 558                         itr_size);
 559                 if (hdr->bDescriptorType == USB_DT_WIRE_ADAPTER)
 560                         goto found;
 561                 itr += hdr->bLength;
 562                 itr_size -= hdr->bLength;
 563         }
 564         dev_err(dev, "cannot find Wire Adapter Class descriptor\n");
 565         return -ENODEV;
 566
 567 found:
 568         result = -EINVAL;
 569         if (hdr->bLength > itr_size) {  /* is it available? */
 570                 dev_err(dev, "incomplete Wire Adapter Class descriptor "
 571                         "(%zu bytes left, %u needed)\n",
 572                         itr_size, hdr->bLength);
 573                 goto error;
 574         }
 575         if (hdr->bLength < sizeof(*wa->wa_descr)) {
 576                 dev_err(dev, "short Wire Adapter Class descriptor\n");
 577                 goto error;
 578         }
 579         wa->wa_descr = wa_descr = (struct usb_wa_descriptor *) hdr;
 580         /* Make LE fields CPU order */
 581         wa_descr->bcdWAVersion = le16_to_cpu(wa_descr->bcdWAVersion);
 582         wa_descr->wNumRPipes = le16_to_cpu(wa_descr->wNumRPipes);
 583         wa_descr->wRPipeMaxBlock = le16_to_cpu(wa_descr->wRPipeMaxBlock);
 584         if (wa_descr->bcdWAVersion > 0x0100)
 585                 dev_warn(dev, "Wire Adapter v%d.%d newer than groked v1.0\n",
 586                          wa_descr->bcdWAVersion & 0xff00 >> 8,
 587                          wa_descr->bcdWAVersion & 0x00ff);
 588         result = 0;
 589 error:
 590         return result;
 591 }
 592
 593 static struct hc_driver hwahc_hc_driver = {
 594         .description = "hwa-hcd",
 595         .product_desc = "Wireless USB HWA host controller",
 596         .hcd_priv_size = sizeof(struct hwahc) - sizeof(struct usb_hcd),
 597         .irq = NULL,                    /* FIXME */
 598         .flags = HCD_USB2,              /* FIXME */
 599         .reset = hwahc_op_reset,
 600         .start = hwahc_op_start,
 601         .pci_suspend = hwahc_op_suspend,
 602         .pci_resume = hwahc_op_resume,
 603         .stop = hwahc_op_stop,
 604         .get_frame_number = hwahc_op_get_frame_number,
 605         .urb_enqueue = hwahc_op_urb_enqueue,
 606         .urb_dequeue = hwahc_op_urb_dequeue,
 607         .endpoint_disable = hwahc_op_endpoint_disable,
 608
 609         .hub_status_data = wusbhc_rh_status_data,
 610         .hub_control = wusbhc_rh_control,
 611         .bus_suspend = wusbhc_rh_suspend,
 612         .bus_resume = wusbhc_rh_resume,
 613         .start_port_reset = wusbhc_rh_start_port_reset,
 614 };
 615
 616 static int hwahc_security_create(struct hwahc *hwahc)
 617 {
 618         int result;
 619         struct wusbhc *wusbhc = &hwahc->wusbhc;
 620         struct usb_device *usb_dev = hwahc->wa.usb_dev;
 621         struct device *dev = &usb_dev->dev;
 622         struct usb_security_descriptor *secd;
 623         struct usb_encryption_descriptor *etd;
 624         void *itr, *top;
 625         size_t itr_size, needed, bytes;
 626         u8 index;
 627         char buf[64];
 628
 629         /* Find the host's security descriptors in the config descr bundle */
 630         index = (usb_dev->actconfig - usb_dev->config) /
 631                 sizeof(usb_dev->config[0]);
 632         itr = usb_dev->rawdescriptors[index];
 633         itr_size = le16_to_cpu(usb_dev->actconfig->desc.wTotalLength);
 634         top = itr + itr_size;
 635         result = __usb_get_extra_descriptor(usb_dev->rawdescriptors[index],
 636                         le16_to_cpu(usb_dev->actconfig->desc.wTotalLength),
 637                         USB_DT_SECURITY, (void **) &secd);
 638         if (result == -1) {
 639                 dev_warn(dev, "BUG? WUSB host has no security descriptors\n");
 640                 return 0;
 641         }
 642         needed = sizeof(*secd);
 643         if (top - (void *)secd < needed) {
 644                 dev_err(dev, "BUG? Not enough data to process security "
 645                         "descriptor header (%zu bytes left vs %zu needed)\n",
 646                         top - (void *) secd, needed);
 647                 return 0;
 648         }
 649         needed = le16_to_cpu(secd->wTotalLength);
 650         if (top - (void *)secd < needed) {
 651                 dev_err(dev, "BUG? Not enough data to process security "
 652                         "descriptors (%zu bytes left vs %zu needed)\n",
 653                         top - (void *) secd, needed);
 654                 return 0;
 655         }
 656         /* Walk over the sec descriptors and store CCM1's on wusbhc */
 657         itr = (void *) secd + sizeof(*secd);
 658         top = (void *) secd + le16_to_cpu(secd->wTotalLength);
 659         index = 0;
 660         bytes = 0;
 661         while (itr < top) {
 662                 etd = itr;
 663                 if (top - itr < sizeof(*etd)) {
 664                         dev_err(dev, "BUG: bad host security descriptor; "
 665                                 "not enough data (%zu vs %zu left)\n",
 666                                 top - itr, sizeof(*etd));
 667                         break;
 668                 }
 669                 if (etd->bLength < sizeof(*etd)) {
 670                         dev_err(dev, "BUG: bad host encryption descriptor; "
 671                                 "descriptor is too short "
 672                                 "(%zu vs %zu needed)\n",
 673                                 (size_t)etd->bLength, sizeof(*etd));
 674                         break;
 675                 }
 676                 itr += etd->bLength;
 677                 bytes += snprintf(buf + bytes, sizeof(buf) - bytes,
 678                                   "%s (0x%02x) ",
 679                                   wusb_et_name(etd->bEncryptionType),
 680                                   etd->bEncryptionValue);
 681                 wusbhc->ccm1_etd = etd;
 682         }
 683         dev_info(dev, "supported encryption types: %s\n", buf);
 684         if (wusbhc->ccm1_etd == NULL) {
 685                 dev_err(dev, "E: host doesn't support CCM-1 crypto\n");
 686                 return 0;
 687         }
 688         /* Pretty print what we support */
 689         return 0;
 690 }
 691
 692 static void hwahc_security_release(struct hwahc *hwahc)
 693 {
 694         /* nothing to do here so far... */
 695 }
 696
 697 static int hwahc_create(struct hwahc *hwahc, struct usb_interface *iface)
 698 {
 699         int result;
 700         struct device *dev = &iface->dev;
 701         struct wusbhc *wusbhc = &hwahc->wusbhc;
 702         struct wahc *wa = &hwahc->wa;
 703         struct usb_device *usb_dev = interface_to_usbdev(iface);
 704
 705         wa->usb_dev = usb_get_dev(usb_dev);     /* bind the USB device */
 706         wa->usb_iface = usb_get_intf(iface);
 707         wusbhc->dev = dev;
 708         wusbhc->uwb_rc = uwb_rc_get_by_grandpa(iface->dev.parent);
 709         if (wusbhc->uwb_rc == NULL) {
 710                 result = -ENODEV;
 711                 dev_err(dev, "Cannot get associated UWB Host Controller\n");
 712                 goto error_rc_get;
 713         }
 714         result = wa_fill_descr(wa);     /* Get the device descriptor */
 715         if (result < 0)
 716                 goto error_fill_descriptor;
 717         if (wa->wa_descr->bNumPorts > USB_MAXCHILDREN) {
 718                 dev_err(dev, "FIXME: USB_MAXCHILDREN too low for WUSB "
 719                         "adapter (%u ports)\n", wa->wa_descr->bNumPorts);
 720                 wusbhc->ports_max = USB_MAXCHILDREN;
 721         } else {
 722                 wusbhc->ports_max = wa->wa_descr->bNumPorts;
 723         }
 724         wusbhc->mmcies_max = wa->wa_descr->bNumMMCIEs;
 725         wusbhc->start = __hwahc_op_wusbhc_start;
 726         wusbhc->stop = __hwahc_op_wusbhc_stop;
 727         wusbhc->mmcie_add = __hwahc_op_mmcie_add;
 728         wusbhc->mmcie_rm = __hwahc_op_mmcie_rm;
 729         wusbhc->dev_info_set = __hwahc_op_dev_info_set;
 730         wusbhc->bwa_set = __hwahc_op_bwa_set;
 731         wusbhc->set_num_dnts = __hwahc_op_set_num_dnts;
 732         wusbhc->set_ptk = __hwahc_op_set_ptk;
 733         wusbhc->set_gtk = __hwahc_op_set_gtk;
 734         result = hwahc_security_create(hwahc);
 735         if (result < 0) {
 736                 dev_err(dev, "Can't initialize security: %d\n", result);
 737                 goto error_security_create;
 738         }
 739         wa->wusb = wusbhc;      /* FIXME: ugly, need to fix */
 740         result = wusbhc_create(&hwahc->wusbhc);
 741         if (result < 0) {
 742                 dev_err(dev, "Can't create WUSB HC structures: %d\n", result);
 743                 goto error_wusbhc_create;
 744         }
 745         result = wa_create(&hwahc->wa, iface);
 746         if (result < 0)
 747                 goto error_wa_create;
 748         return 0;
 749
 750 error_wa_create:
 751         wusbhc_destroy(&hwahc->wusbhc);
 752 error_wusbhc_create:
 753         /* WA Descr fill allocs no resources */
 754 error_security_create:
 755 error_fill_descriptor:
 756         uwb_rc_put(wusbhc->uwb_rc);
 757 error_rc_get:
 758         usb_put_intf(iface);
 759         usb_put_dev(usb_dev);
 760         return result;
 761 }
 762
 763 static void hwahc_destroy(struct hwahc *hwahc)
 764 {
 765         struct wusbhc *wusbhc = &hwahc->wusbhc;
 766
 767         mutex_lock(&wusbhc->mutex);
 768         __wa_destroy(&hwahc->wa);
 769         wusbhc_destroy(&hwahc->wusbhc);
 770         hwahc_security_release(hwahc);
 771         hwahc->wusbhc.dev = NULL;
 772         uwb_rc_put(wusbhc->uwb_rc);
 773         usb_put_intf(hwahc->wa.usb_iface);
 774         usb_put_dev(hwahc->wa.usb_dev);
 775         mutex_unlock(&wusbhc->mutex);
 776 }
 777
 778 static void hwahc_init(struct hwahc *hwahc)
 779 {
 780         wa_init(&hwahc->wa);
 781 }
 782
 783 static int hwahc_probe(struct usb_interface *usb_iface,
 784                        const struct usb_device_id *id)
 785 {
 786         int result;
 787         struct usb_hcd *usb_hcd;
 788         struct wusbhc *wusbhc;
 789         struct hwahc *hwahc;
 790         struct device *dev = &usb_iface->dev;
 791
 792         result = -ENOMEM;
 793         usb_hcd = usb_create_hcd(&hwahc_hc_driver, &usb_iface->dev, "wusb-hwa");
 794         if (usb_hcd == NULL) {
 795                 dev_err(dev, "unable to allocate instance\n");
 796                 goto error_alloc;
 797         }
 798         usb_hcd->wireless = 1;
 799         usb_hcd->flags |= HCD_FLAG_SAW_IRQ;
 800         wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 801         hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 802         hwahc_init(hwahc);
 803         result = hwahc_create(hwahc, usb_iface);
 804         if (result < 0) {
 805                 dev_err(dev, "Cannot initialize internals: %d\n", result);
 806                 goto error_hwahc_create;
 807         }
 808         result = usb_add_hcd(usb_hcd, 0, 0);
 809         if (result < 0) {
 810                 dev_err(dev, "Cannot add HCD: %d\n", result);
 811                 goto error_add_hcd;
 812         }
 813         result = wusbhc_b_create(&hwahc->wusbhc);
 814         if (result < 0) {
 815                 dev_err(dev, "Cannot setup phase B of WUSBHC: %d\n", result);
 816                 goto error_wusbhc_b_create;
 817         }
 818         return 0;
 819
 820 error_wusbhc_b_create:
 821         usb_remove_hcd(usb_hcd);
 822 error_add_hcd:
 823         hwahc_destroy(hwahc);
 824 error_hwahc_create:
 825         usb_put_hcd(usb_hcd);
 826 error_alloc:
 827         return result;
 828 }
 829
 830 static void hwahc_disconnect(struct usb_interface *usb_iface)
 831 {
 832         struct usb_hcd *usb_hcd;
 833         struct wusbhc *wusbhc;
 834         struct hwahc *hwahc;
 835
 836         usb_hcd = usb_get_intfdata(usb_iface);
 837         wusbhc = usb_hcd_to_wusbhc(usb_hcd);
 838         hwahc = container_of(wusbhc, struct hwahc, wusbhc);
 839
 840         wusbhc_b_destroy(&hwahc->wusbhc);
 841         usb_remove_hcd(usb_hcd);
 842         hwahc_destroy(hwahc);
 843         usb_put_hcd(usb_hcd);
 844 }
 845
 846 static struct usb_device_id hwahc_id_table[] = {
 847         /* FIXME: use class labels for this */
 848         { USB_INTERFACE_INFO(0xe0, 0x02, 0x01), },
 849         {},
 850 };
 851 MODULE_DEVICE_TABLE(usb, hwahc_id_table);
 852
 853 static struct usb_driver hwahc_driver = {
 854         .name =         "hwa-hc",
 855         .probe =        hwahc_probe,
 856         .disconnect =   hwahc_disconnect,
 857         .id_table =     hwahc_id_table,
 858 };
 859
 860 static int __init hwahc_driver_init(void)
 861 {
 862         return usb_register(&hwahc_driver);
 863 }
 864 module_init(hwahc_driver_init);
 865
 866 static void __exit hwahc_driver_exit(void)
 867 {
 868         usb_deregister(&hwahc_driver);
 869 }
 870 module_exit(hwahc_driver_exit);
 871
 872
 873 MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
 874 MODULE_DESCRIPTION("Host Wired Adapter USB Host Control Driver");
 875 MODULE_LICENSE("GPL");