linux/drivers/bluetooth/btusb.c
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   1/*
   2 *
   3 *  Generic Bluetooth USB driver
   4 *
   5 *  Copyright (C) 2005-2008  Marcel Holtmann <marcel@holtmann.org>
   6 *
   7 *
   8 *  This program is free software; you can redistribute it and/or modify
   9 *  it under the terms of the GNU General Public License as published by
  10 *  the Free Software Foundation; either version 2 of the License, or
  11 *  (at your option) any later version.
  12 *
  13 *  This program is distributed in the hope that it will be useful,
  14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 *  GNU General Public License for more details.
  17 *
  18 *  You should have received a copy of the GNU General Public License
  19 *  along with this program; if not, write to the Free Software
  20 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21 *
  22 */
  23
  24#include <linux/module.h>
  25#include <linux/usb.h>
  26#include <linux/firmware.h>
  27
  28#include <net/bluetooth/bluetooth.h>
  29#include <net/bluetooth/hci_core.h>
  30
  31#define VERSION "0.6"
  32
  33static bool ignore_dga;
  34static bool ignore_csr;
  35static bool ignore_sniffer;
  36static bool disable_scofix;
  37static bool force_scofix;
  38
  39static bool reset = 1;
  40
  41static struct usb_driver btusb_driver;
  42
  43#define BTUSB_IGNORE            0x01
  44#define BTUSB_DIGIANSWER        0x02
  45#define BTUSB_CSR               0x04
  46#define BTUSB_SNIFFER           0x08
  47#define BTUSB_BCM92035          0x10
  48#define BTUSB_BROKEN_ISOC       0x20
  49#define BTUSB_WRONG_SCO_MTU     0x40
  50#define BTUSB_ATH3012           0x80
  51#define BTUSB_INTEL             0x100
  52
  53static struct usb_device_id btusb_table[] = {
  54        /* Generic Bluetooth USB device */
  55        { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
  56
  57        /* Apple-specific (Broadcom) devices */
  58        { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01) },
  59
  60        /* MediaTek MT76x0E */
  61        { USB_DEVICE(0x0e8d, 0x763f) },
  62
  63        /* Broadcom SoftSailing reporting vendor specific */
  64        { USB_DEVICE(0x0a5c, 0x21e1) },
  65
  66        /* Apple MacBookPro 7,1 */
  67        { USB_DEVICE(0x05ac, 0x8213) },
  68
  69        /* Apple iMac11,1 */
  70        { USB_DEVICE(0x05ac, 0x8215) },
  71
  72        /* Apple MacBookPro6,2 */
  73        { USB_DEVICE(0x05ac, 0x8218) },
  74
  75        /* Apple MacBookAir3,1, MacBookAir3,2 */
  76        { USB_DEVICE(0x05ac, 0x821b) },
  77
  78        /* Apple MacBookAir4,1 */
  79        { USB_DEVICE(0x05ac, 0x821f) },
  80
  81        /* Apple MacBookPro8,2 */
  82        { USB_DEVICE(0x05ac, 0x821a) },
  83
  84        /* Apple MacMini5,1 */
  85        { USB_DEVICE(0x05ac, 0x8281) },
  86
  87        /* AVM BlueFRITZ! USB v2.0 */
  88        { USB_DEVICE(0x057c, 0x3800) },
  89
  90        /* Bluetooth Ultraport Module from IBM */
  91        { USB_DEVICE(0x04bf, 0x030a) },
  92
  93        /* ALPS Modules with non-standard id */
  94        { USB_DEVICE(0x044e, 0x3001) },
  95        { USB_DEVICE(0x044e, 0x3002) },
  96
  97        /* Ericsson with non-standard id */
  98        { USB_DEVICE(0x0bdb, 0x1002) },
  99
 100        /* Canyon CN-BTU1 with HID interfaces */
 101        { USB_DEVICE(0x0c10, 0x0000) },
 102
 103        /* Broadcom BCM20702A0 */
 104        { USB_DEVICE(0x0b05, 0x17b5) },
 105        { USB_DEVICE(0x04ca, 0x2003) },
 106        { USB_DEVICE(0x0489, 0xe042) },
 107        { USB_DEVICE(0x413c, 0x8197) },
 108
 109        /* Foxconn - Hon Hai */
 110        { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01) },
 111
 112        /*Broadcom devices with vendor specific id */
 113        { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01) },
 114
 115        { }     /* Terminating entry */
 116};
 117
 118MODULE_DEVICE_TABLE(usb, btusb_table);
 119
 120static struct usb_device_id blacklist_table[] = {
 121        /* CSR BlueCore devices */
 122        { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
 123
 124        /* Broadcom BCM2033 without firmware */
 125        { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
 126
 127        /* Atheros 3011 with sflash firmware */
 128        { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
 129        { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
 130        { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
 131        { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
 132        { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
 133        { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
 134
 135        /* Atheros AR9285 Malbec with sflash firmware */
 136        { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 137
 138        /* Atheros 3012 with sflash firmware */
 139        { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
 140        { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 141        { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 142        { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
 143        { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
 144        { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 145        { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 146        { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 147        { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 148        { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 149        { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 150        { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 151        { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 152        { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 153        { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 154        { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 155        { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 156        { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 157        { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 158        { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 159        { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 160        { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 161
 162        /* Atheros AR5BBU12 with sflash firmware */
 163        { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
 164
 165        /* Atheros AR5BBU12 with sflash firmware */
 166        { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
 167        { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
 168
 169        /* Broadcom BCM2035 */
 170        { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 171        { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
 172        { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 173
 174        /* Broadcom BCM2045 */
 175        { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
 176        { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
 177
 178        /* IBM/Lenovo ThinkPad with Broadcom chip */
 179        { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
 180        { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
 181
 182        /* HP laptop with Broadcom chip */
 183        { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
 184
 185        /* Dell laptop with Broadcom chip */
 186        { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
 187
 188        /* Dell Wireless 370 and 410 devices */
 189        { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
 190        { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
 191
 192        /* Belkin F8T012 and F8T013 devices */
 193        { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
 194        { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
 195
 196        /* Asus WL-BTD202 device */
 197        { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
 198
 199        /* Kensington Bluetooth USB adapter */
 200        { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
 201
 202        /* RTX Telecom based adapters with buggy SCO support */
 203        { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
 204        { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
 205
 206        /* CONWISE Technology based adapters with buggy SCO support */
 207        { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
 208
 209        /* Digianswer devices */
 210        { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
 211        { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
 212
 213        /* CSR BlueCore Bluetooth Sniffer */
 214        { USB_DEVICE(0x0a12, 0x0002), .driver_info = BTUSB_SNIFFER },
 215
 216        /* Frontline ComProbe Bluetooth Sniffer */
 217        { USB_DEVICE(0x16d3, 0x0002), .driver_info = BTUSB_SNIFFER },
 218
 219        /* Intel Bluetooth device */
 220        { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
 221
 222        { }     /* Terminating entry */
 223};
 224
 225#define BTUSB_MAX_ISOC_FRAMES   10
 226
 227#define BTUSB_INTR_RUNNING      0
 228#define BTUSB_BULK_RUNNING      1
 229#define BTUSB_ISOC_RUNNING      2
 230#define BTUSB_SUSPENDING        3
 231#define BTUSB_DID_ISO_RESUME    4
 232
 233struct btusb_data {
 234        struct hci_dev       *hdev;
 235        struct usb_device    *udev;
 236        struct usb_interface *intf;
 237        struct usb_interface *isoc;
 238
 239        spinlock_t lock;
 240
 241        unsigned long flags;
 242
 243        struct work_struct work;
 244        struct work_struct waker;
 245
 246        struct usb_anchor tx_anchor;
 247        struct usb_anchor intr_anchor;
 248        struct usb_anchor bulk_anchor;
 249        struct usb_anchor isoc_anchor;
 250        struct usb_anchor deferred;
 251        int tx_in_flight;
 252        spinlock_t txlock;
 253
 254        struct usb_endpoint_descriptor *intr_ep;
 255        struct usb_endpoint_descriptor *bulk_tx_ep;
 256        struct usb_endpoint_descriptor *bulk_rx_ep;
 257        struct usb_endpoint_descriptor *isoc_tx_ep;
 258        struct usb_endpoint_descriptor *isoc_rx_ep;
 259
 260        __u8 cmdreq_type;
 261
 262        unsigned int sco_num;
 263        int isoc_altsetting;
 264        int suspend_count;
 265};
 266
 267static int inc_tx(struct btusb_data *data)
 268{
 269        unsigned long flags;
 270        int rv;
 271
 272        spin_lock_irqsave(&data->txlock, flags);
 273        rv = test_bit(BTUSB_SUSPENDING, &data->flags);
 274        if (!rv)
 275                data->tx_in_flight++;
 276        spin_unlock_irqrestore(&data->txlock, flags);
 277
 278        return rv;
 279}
 280
 281static void btusb_intr_complete(struct urb *urb)
 282{
 283        struct hci_dev *hdev = urb->context;
 284        struct btusb_data *data = hci_get_drvdata(hdev);
 285        int err;
 286
 287        BT_DBG("%s urb %p status %d count %d", hdev->name,
 288                                        urb, urb->status, urb->actual_length);
 289
 290        if (!test_bit(HCI_RUNNING, &hdev->flags))
 291                return;
 292
 293        if (urb->status == 0) {
 294                hdev->stat.byte_rx += urb->actual_length;
 295
 296                if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
 297                                                urb->transfer_buffer,
 298                                                urb->actual_length) < 0) {
 299                        BT_ERR("%s corrupted event packet", hdev->name);
 300                        hdev->stat.err_rx++;
 301                }
 302        }
 303
 304        if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
 305                return;
 306
 307        usb_mark_last_busy(data->udev);
 308        usb_anchor_urb(urb, &data->intr_anchor);
 309
 310        err = usb_submit_urb(urb, GFP_ATOMIC);
 311        if (err < 0) {
 312                /* -EPERM: urb is being killed;
 313                 * -ENODEV: device got disconnected */
 314                if (err != -EPERM && err != -ENODEV)
 315                        BT_ERR("%s urb %p failed to resubmit (%d)",
 316                                                hdev->name, urb, -err);
 317                usb_unanchor_urb(urb);
 318        }
 319}
 320
 321static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
 322{
 323        struct btusb_data *data = hci_get_drvdata(hdev);
 324        struct urb *urb;
 325        unsigned char *buf;
 326        unsigned int pipe;
 327        int err, size;
 328
 329        BT_DBG("%s", hdev->name);
 330
 331        if (!data->intr_ep)
 332                return -ENODEV;
 333
 334        urb = usb_alloc_urb(0, mem_flags);
 335        if (!urb)
 336                return -ENOMEM;
 337
 338        size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
 339
 340        buf = kmalloc(size, mem_flags);
 341        if (!buf) {
 342                usb_free_urb(urb);
 343                return -ENOMEM;
 344        }
 345
 346        pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
 347
 348        usb_fill_int_urb(urb, data->udev, pipe, buf, size,
 349                                                btusb_intr_complete, hdev,
 350                                                data->intr_ep->bInterval);
 351
 352        urb->transfer_flags |= URB_FREE_BUFFER;
 353
 354        usb_anchor_urb(urb, &data->intr_anchor);
 355
 356        err = usb_submit_urb(urb, mem_flags);
 357        if (err < 0) {
 358                if (err != -EPERM && err != -ENODEV)
 359                        BT_ERR("%s urb %p submission failed (%d)",
 360                                                hdev->name, urb, -err);
 361                usb_unanchor_urb(urb);
 362        }
 363
 364        usb_free_urb(urb);
 365
 366        return err;
 367}
 368
 369static void btusb_bulk_complete(struct urb *urb)
 370{
 371        struct hci_dev *hdev = urb->context;
 372        struct btusb_data *data = hci_get_drvdata(hdev);
 373        int err;
 374
 375        BT_DBG("%s urb %p status %d count %d", hdev->name,
 376                                        urb, urb->status, urb->actual_length);
 377
 378        if (!test_bit(HCI_RUNNING, &hdev->flags))
 379                return;
 380
 381        if (urb->status == 0) {
 382                hdev->stat.byte_rx += urb->actual_length;
 383
 384                if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
 385                                                urb->transfer_buffer,
 386                                                urb->actual_length) < 0) {
 387                        BT_ERR("%s corrupted ACL packet", hdev->name);
 388                        hdev->stat.err_rx++;
 389                }
 390        }
 391
 392        if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
 393                return;
 394
 395        usb_anchor_urb(urb, &data->bulk_anchor);
 396        usb_mark_last_busy(data->udev);
 397
 398        err = usb_submit_urb(urb, GFP_ATOMIC);
 399        if (err < 0) {
 400                /* -EPERM: urb is being killed;
 401                 * -ENODEV: device got disconnected */
 402                if (err != -EPERM && err != -ENODEV)
 403                        BT_ERR("%s urb %p failed to resubmit (%d)",
 404                                                hdev->name, urb, -err);
 405                usb_unanchor_urb(urb);
 406        }
 407}
 408
 409static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
 410{
 411        struct btusb_data *data = hci_get_drvdata(hdev);
 412        struct urb *urb;
 413        unsigned char *buf;
 414        unsigned int pipe;
 415        int err, size = HCI_MAX_FRAME_SIZE;
 416
 417        BT_DBG("%s", hdev->name);
 418
 419        if (!data->bulk_rx_ep)
 420                return -ENODEV;
 421
 422        urb = usb_alloc_urb(0, mem_flags);
 423        if (!urb)
 424                return -ENOMEM;
 425
 426        buf = kmalloc(size, mem_flags);
 427        if (!buf) {
 428                usb_free_urb(urb);
 429                return -ENOMEM;
 430        }
 431
 432        pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
 433
 434        usb_fill_bulk_urb(urb, data->udev, pipe,
 435                                        buf, size, btusb_bulk_complete, hdev);
 436
 437        urb->transfer_flags |= URB_FREE_BUFFER;
 438
 439        usb_mark_last_busy(data->udev);
 440        usb_anchor_urb(urb, &data->bulk_anchor);
 441
 442        err = usb_submit_urb(urb, mem_flags);
 443        if (err < 0) {
 444                if (err != -EPERM && err != -ENODEV)
 445                        BT_ERR("%s urb %p submission failed (%d)",
 446                                                hdev->name, urb, -err);
 447                usb_unanchor_urb(urb);
 448        }
 449
 450        usb_free_urb(urb);
 451
 452        return err;
 453}
 454
 455static void btusb_isoc_complete(struct urb *urb)
 456{
 457        struct hci_dev *hdev = urb->context;
 458        struct btusb_data *data = hci_get_drvdata(hdev);
 459        int i, err;
 460
 461        BT_DBG("%s urb %p status %d count %d", hdev->name,
 462                                        urb, urb->status, urb->actual_length);
 463
 464        if (!test_bit(HCI_RUNNING, &hdev->flags))
 465                return;
 466
 467        if (urb->status == 0) {
 468                for (i = 0; i < urb->number_of_packets; i++) {
 469                        unsigned int offset = urb->iso_frame_desc[i].offset;
 470                        unsigned int length = urb->iso_frame_desc[i].actual_length;
 471
 472                        if (urb->iso_frame_desc[i].status)
 473                                continue;
 474
 475                        hdev->stat.byte_rx += length;
 476
 477                        if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
 478                                                urb->transfer_buffer + offset,
 479                                                                length) < 0) {
 480                                BT_ERR("%s corrupted SCO packet", hdev->name);
 481                                hdev->stat.err_rx++;
 482                        }
 483                }
 484        }
 485
 486        if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
 487                return;
 488
 489        usb_anchor_urb(urb, &data->isoc_anchor);
 490
 491        err = usb_submit_urb(urb, GFP_ATOMIC);
 492        if (err < 0) {
 493                /* -EPERM: urb is being killed;
 494                 * -ENODEV: device got disconnected */
 495                if (err != -EPERM && err != -ENODEV)
 496                        BT_ERR("%s urb %p failed to resubmit (%d)",
 497                                                hdev->name, urb, -err);
 498                usb_unanchor_urb(urb);
 499        }
 500}
 501
 502static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
 503{
 504        int i, offset = 0;
 505
 506        BT_DBG("len %d mtu %d", len, mtu);
 507
 508        for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
 509                                        i++, offset += mtu, len -= mtu) {
 510                urb->iso_frame_desc[i].offset = offset;
 511                urb->iso_frame_desc[i].length = mtu;
 512        }
 513
 514        if (len && i < BTUSB_MAX_ISOC_FRAMES) {
 515                urb->iso_frame_desc[i].offset = offset;
 516                urb->iso_frame_desc[i].length = len;
 517                i++;
 518        }
 519
 520        urb->number_of_packets = i;
 521}
 522
 523static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
 524{
 525        struct btusb_data *data = hci_get_drvdata(hdev);
 526        struct urb *urb;
 527        unsigned char *buf;
 528        unsigned int pipe;
 529        int err, size;
 530
 531        BT_DBG("%s", hdev->name);
 532
 533        if (!data->isoc_rx_ep)
 534                return -ENODEV;
 535
 536        urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
 537        if (!urb)
 538                return -ENOMEM;
 539
 540        size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
 541                                                BTUSB_MAX_ISOC_FRAMES;
 542
 543        buf = kmalloc(size, mem_flags);
 544        if (!buf) {
 545                usb_free_urb(urb);
 546                return -ENOMEM;
 547        }
 548
 549        pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
 550
 551        usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
 552                                hdev, data->isoc_rx_ep->bInterval);
 553
 554        urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
 555
 556        __fill_isoc_descriptor(urb, size,
 557                        le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
 558
 559        usb_anchor_urb(urb, &data->isoc_anchor);
 560
 561        err = usb_submit_urb(urb, mem_flags);
 562        if (err < 0) {
 563                if (err != -EPERM && err != -ENODEV)
 564                        BT_ERR("%s urb %p submission failed (%d)",
 565                                                hdev->name, urb, -err);
 566                usb_unanchor_urb(urb);
 567        }
 568
 569        usb_free_urb(urb);
 570
 571        return err;
 572}
 573
 574static void btusb_tx_complete(struct urb *urb)
 575{
 576        struct sk_buff *skb = urb->context;
 577        struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 578        struct btusb_data *data = hci_get_drvdata(hdev);
 579
 580        BT_DBG("%s urb %p status %d count %d", hdev->name,
 581                                        urb, urb->status, urb->actual_length);
 582
 583        if (!test_bit(HCI_RUNNING, &hdev->flags))
 584                goto done;
 585
 586        if (!urb->status)
 587                hdev->stat.byte_tx += urb->transfer_buffer_length;
 588        else
 589                hdev->stat.err_tx++;
 590
 591done:
 592        spin_lock(&data->txlock);
 593        data->tx_in_flight--;
 594        spin_unlock(&data->txlock);
 595
 596        kfree(urb->setup_packet);
 597
 598        kfree_skb(skb);
 599}
 600
 601static void btusb_isoc_tx_complete(struct urb *urb)
 602{
 603        struct sk_buff *skb = urb->context;
 604        struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 605
 606        BT_DBG("%s urb %p status %d count %d", hdev->name,
 607                                        urb, urb->status, urb->actual_length);
 608
 609        if (!test_bit(HCI_RUNNING, &hdev->flags))
 610                goto done;
 611
 612        if (!urb->status)
 613                hdev->stat.byte_tx += urb->transfer_buffer_length;
 614        else
 615                hdev->stat.err_tx++;
 616
 617done:
 618        kfree(urb->setup_packet);
 619
 620        kfree_skb(skb);
 621}
 622
 623static int btusb_open(struct hci_dev *hdev)
 624{
 625        struct btusb_data *data = hci_get_drvdata(hdev);
 626        int err;
 627
 628        BT_DBG("%s", hdev->name);
 629
 630        err = usb_autopm_get_interface(data->intf);
 631        if (err < 0)
 632                return err;
 633
 634        data->intf->needs_remote_wakeup = 1;
 635
 636        if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
 637                goto done;
 638
 639        if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
 640                goto done;
 641
 642        err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
 643        if (err < 0)
 644                goto failed;
 645
 646        err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 647        if (err < 0) {
 648                usb_kill_anchored_urbs(&data->intr_anchor);
 649                goto failed;
 650        }
 651
 652        set_bit(BTUSB_BULK_RUNNING, &data->flags);
 653        btusb_submit_bulk_urb(hdev, GFP_KERNEL);
 654
 655done:
 656        usb_autopm_put_interface(data->intf);
 657        return 0;
 658
 659failed:
 660        clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 661        clear_bit(HCI_RUNNING, &hdev->flags);
 662        usb_autopm_put_interface(data->intf);
 663        return err;
 664}
 665
 666static void btusb_stop_traffic(struct btusb_data *data)
 667{
 668        usb_kill_anchored_urbs(&data->intr_anchor);
 669        usb_kill_anchored_urbs(&data->bulk_anchor);
 670        usb_kill_anchored_urbs(&data->isoc_anchor);
 671}
 672
 673static int btusb_close(struct hci_dev *hdev)
 674{
 675        struct btusb_data *data = hci_get_drvdata(hdev);
 676        int err;
 677
 678        BT_DBG("%s", hdev->name);
 679
 680        if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
 681                return 0;
 682
 683        cancel_work_sync(&data->work);
 684        cancel_work_sync(&data->waker);
 685
 686        clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 687        clear_bit(BTUSB_BULK_RUNNING, &data->flags);
 688        clear_bit(BTUSB_INTR_RUNNING, &data->flags);
 689
 690        btusb_stop_traffic(data);
 691        err = usb_autopm_get_interface(data->intf);
 692        if (err < 0)
 693                goto failed;
 694
 695        data->intf->needs_remote_wakeup = 0;
 696        usb_autopm_put_interface(data->intf);
 697
 698failed:
 699        usb_scuttle_anchored_urbs(&data->deferred);
 700        return 0;
 701}
 702
 703static int btusb_flush(struct hci_dev *hdev)
 704{
 705        struct btusb_data *data = hci_get_drvdata(hdev);
 706
 707        BT_DBG("%s", hdev->name);
 708
 709        usb_kill_anchored_urbs(&data->tx_anchor);
 710
 711        return 0;
 712}
 713
 714static int btusb_send_frame(struct sk_buff *skb)
 715{
 716        struct hci_dev *hdev = (struct hci_dev *) skb->dev;
 717        struct btusb_data *data = hci_get_drvdata(hdev);
 718        struct usb_ctrlrequest *dr;
 719        struct urb *urb;
 720        unsigned int pipe;
 721        int err;
 722
 723        BT_DBG("%s", hdev->name);
 724
 725        if (!test_bit(HCI_RUNNING, &hdev->flags))
 726                return -EBUSY;
 727
 728        switch (bt_cb(skb)->pkt_type) {
 729        case HCI_COMMAND_PKT:
 730                urb = usb_alloc_urb(0, GFP_ATOMIC);
 731                if (!urb)
 732                        return -ENOMEM;
 733
 734                dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
 735                if (!dr) {
 736                        usb_free_urb(urb);
 737                        return -ENOMEM;
 738                }
 739
 740                dr->bRequestType = data->cmdreq_type;
 741                dr->bRequest     = 0;
 742                dr->wIndex       = 0;
 743                dr->wValue       = 0;
 744                dr->wLength      = __cpu_to_le16(skb->len);
 745
 746                pipe = usb_sndctrlpipe(data->udev, 0x00);
 747
 748                usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
 749                                skb->data, skb->len, btusb_tx_complete, skb);
 750
 751                hdev->stat.cmd_tx++;
 752                break;
 753
 754        case HCI_ACLDATA_PKT:
 755                if (!data->bulk_tx_ep)
 756                        return -ENODEV;
 757
 758                urb = usb_alloc_urb(0, GFP_ATOMIC);
 759                if (!urb)
 760                        return -ENOMEM;
 761
 762                pipe = usb_sndbulkpipe(data->udev,
 763                                        data->bulk_tx_ep->bEndpointAddress);
 764
 765                usb_fill_bulk_urb(urb, data->udev, pipe,
 766                                skb->data, skb->len, btusb_tx_complete, skb);
 767
 768                hdev->stat.acl_tx++;
 769                break;
 770
 771        case HCI_SCODATA_PKT:
 772                if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1)
 773                        return -ENODEV;
 774
 775                urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
 776                if (!urb)
 777                        return -ENOMEM;
 778
 779                pipe = usb_sndisocpipe(data->udev,
 780                                        data->isoc_tx_ep->bEndpointAddress);
 781
 782                usb_fill_int_urb(urb, data->udev, pipe,
 783                                skb->data, skb->len, btusb_isoc_tx_complete,
 784                                skb, data->isoc_tx_ep->bInterval);
 785
 786                urb->transfer_flags  = URB_ISO_ASAP;
 787
 788                __fill_isoc_descriptor(urb, skb->len,
 789                                le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
 790
 791                hdev->stat.sco_tx++;
 792                goto skip_waking;
 793
 794        default:
 795                return -EILSEQ;
 796        }
 797
 798        err = inc_tx(data);
 799        if (err) {
 800                usb_anchor_urb(urb, &data->deferred);
 801                schedule_work(&data->waker);
 802                err = 0;
 803                goto done;
 804        }
 805
 806skip_waking:
 807        usb_anchor_urb(urb, &data->tx_anchor);
 808
 809        err = usb_submit_urb(urb, GFP_ATOMIC);
 810        if (err < 0) {
 811                if (err != -EPERM && err != -ENODEV)
 812                        BT_ERR("%s urb %p submission failed (%d)",
 813                                                hdev->name, urb, -err);
 814                kfree(urb->setup_packet);
 815                usb_unanchor_urb(urb);
 816        } else {
 817                usb_mark_last_busy(data->udev);
 818        }
 819
 820done:
 821        usb_free_urb(urb);
 822        return err;
 823}
 824
 825static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
 826{
 827        struct btusb_data *data = hci_get_drvdata(hdev);
 828
 829        BT_DBG("%s evt %d", hdev->name, evt);
 830
 831        if (hdev->conn_hash.sco_num != data->sco_num) {
 832                data->sco_num = hdev->conn_hash.sco_num;
 833                schedule_work(&data->work);
 834        }
 835}
 836
 837static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
 838{
 839        struct btusb_data *data = hci_get_drvdata(hdev);
 840        struct usb_interface *intf = data->isoc;
 841        struct usb_endpoint_descriptor *ep_desc;
 842        int i, err;
 843
 844        if (!data->isoc)
 845                return -ENODEV;
 846
 847        err = usb_set_interface(data->udev, 1, altsetting);
 848        if (err < 0) {
 849                BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
 850                return err;
 851        }
 852
 853        data->isoc_altsetting = altsetting;
 854
 855        data->isoc_tx_ep = NULL;
 856        data->isoc_rx_ep = NULL;
 857
 858        for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
 859                ep_desc = &intf->cur_altsetting->endpoint[i].desc;
 860
 861                if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
 862                        data->isoc_tx_ep = ep_desc;
 863                        continue;
 864                }
 865
 866                if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
 867                        data->isoc_rx_ep = ep_desc;
 868                        continue;
 869                }
 870        }
 871
 872        if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
 873                BT_ERR("%s invalid SCO descriptors", hdev->name);
 874                return -ENODEV;
 875        }
 876
 877        return 0;
 878}
 879
 880static void btusb_work(struct work_struct *work)
 881{
 882        struct btusb_data *data = container_of(work, struct btusb_data, work);
 883        struct hci_dev *hdev = data->hdev;
 884        int new_alts;
 885        int err;
 886
 887        if (hdev->conn_hash.sco_num > 0) {
 888                if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
 889                        err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
 890                        if (err < 0) {
 891                                clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 892                                usb_kill_anchored_urbs(&data->isoc_anchor);
 893                                return;
 894                        }
 895
 896                        set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
 897                }
 898
 899                if (hdev->voice_setting & 0x0020) {
 900                        static const int alts[3] = { 2, 4, 5 };
 901                        new_alts = alts[hdev->conn_hash.sco_num - 1];
 902                } else {
 903                        new_alts = hdev->conn_hash.sco_num;
 904                }
 905
 906                if (data->isoc_altsetting != new_alts) {
 907                        clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 908                        usb_kill_anchored_urbs(&data->isoc_anchor);
 909
 910                        if (__set_isoc_interface(hdev, new_alts) < 0)
 911                                return;
 912                }
 913
 914                if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
 915                        if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
 916                                clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 917                        else
 918                                btusb_submit_isoc_urb(hdev, GFP_KERNEL);
 919                }
 920        } else {
 921                clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
 922                usb_kill_anchored_urbs(&data->isoc_anchor);
 923
 924                __set_isoc_interface(hdev, 0);
 925                if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
 926                        usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
 927        }
 928}
 929
 930static void btusb_waker(struct work_struct *work)
 931{
 932        struct btusb_data *data = container_of(work, struct btusb_data, waker);
 933        int err;
 934
 935        err = usb_autopm_get_interface(data->intf);
 936        if (err < 0)
 937                return;
 938
 939        usb_autopm_put_interface(data->intf);
 940}
 941
 942static int btusb_setup_bcm92035(struct hci_dev *hdev)
 943{
 944        struct sk_buff *skb;
 945        u8 val = 0x00;
 946
 947        BT_DBG("%s", hdev->name);
 948
 949        skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
 950        if (IS_ERR(skb))
 951                BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
 952        else
 953                kfree_skb(skb);
 954
 955        return 0;
 956}
 957
 958struct intel_version {
 959        u8 status;
 960        u8 hw_platform;
 961        u8 hw_variant;
 962        u8 hw_revision;
 963        u8 fw_variant;
 964        u8 fw_revision;
 965        u8 fw_build_num;
 966        u8 fw_build_ww;
 967        u8 fw_build_yy;
 968        u8 fw_patch_num;
 969} __packed;
 970
 971static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
 972                                                struct intel_version *ver)
 973{
 974        const struct firmware *fw;
 975        char fwname[64];
 976        int ret;
 977
 978        snprintf(fwname, sizeof(fwname),
 979                 "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
 980                 ver->hw_platform, ver->hw_variant, ver->hw_revision,
 981                 ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
 982                 ver->fw_build_ww, ver->fw_build_yy);
 983
 984        ret = request_firmware(&fw, fwname, &hdev->dev);
 985        if (ret < 0) {
 986                if (ret == -EINVAL) {
 987                        BT_ERR("%s Intel firmware file request failed (%d)",
 988                               hdev->name, ret);
 989                        return NULL;
 990                }
 991
 992                BT_ERR("%s failed to open Intel firmware file: %s(%d)",
 993                       hdev->name, fwname, ret);
 994
 995                /* If the correct firmware patch file is not found, use the
 996                 * default firmware patch file instead
 997                 */
 998                snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
 999                         ver->hw_platform, ver->hw_variant);
1000                if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1001                        BT_ERR("%s failed to open default Intel fw file: %s",
1002                               hdev->name, fwname);
1003                        return NULL;
1004                }
1005        }
1006
1007        BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
1008
1009        return fw;
1010}
1011
1012static int btusb_setup_intel_patching(struct hci_dev *hdev,
1013                                      const struct firmware *fw,
1014                                      const u8 **fw_ptr, int *disable_patch)
1015{
1016        struct sk_buff *skb;
1017        struct hci_command_hdr *cmd;
1018        const u8 *cmd_param;
1019        struct hci_event_hdr *evt = NULL;
1020        const u8 *evt_param = NULL;
1021        int remain = fw->size - (*fw_ptr - fw->data);
1022
1023        /* The first byte indicates the types of the patch command or event.
1024         * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1025         * in the current firmware buffer doesn't start with 0x01 or
1026         * the size of remain buffer is smaller than HCI command header,
1027         * the firmware file is corrupted and it should stop the patching
1028         * process.
1029         */
1030        if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1031                BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
1032                return -EINVAL;
1033        }
1034        (*fw_ptr)++;
1035        remain--;
1036
1037        cmd = (struct hci_command_hdr *)(*fw_ptr);
1038        *fw_ptr += sizeof(*cmd);
1039        remain -= sizeof(*cmd);
1040
1041        /* Ensure that the remain firmware data is long enough than the length
1042         * of command parameter. If not, the firmware file is corrupted.
1043         */
1044        if (remain < cmd->plen) {
1045                BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
1046                return -EFAULT;
1047        }
1048
1049        /* If there is a command that loads a patch in the firmware
1050         * file, then enable the patch upon success, otherwise just
1051         * disable the manufacturer mode, for example patch activation
1052         * is not required when the default firmware patch file is used
1053         * because there are no patch data to load.
1054         */
1055        if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1056                *disable_patch = 0;
1057
1058        cmd_param = *fw_ptr;
1059        *fw_ptr += cmd->plen;
1060        remain -= cmd->plen;
1061
1062        /* This reads the expected events when the above command is sent to the
1063         * device. Some vendor commands expects more than one events, for
1064         * example command status event followed by vendor specific event.
1065         * For this case, it only keeps the last expected event. so the command
1066         * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1067         * last expected event.
1068         */
1069        while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1070                (*fw_ptr)++;
1071                remain--;
1072
1073                evt = (struct hci_event_hdr *)(*fw_ptr);
1074                *fw_ptr += sizeof(*evt);
1075                remain -= sizeof(*evt);
1076
1077                if (remain < evt->plen) {
1078                        BT_ERR("%s Intel fw corrupted: invalid evt len",
1079                               hdev->name);
1080                        return -EFAULT;
1081                }
1082
1083                evt_param = *fw_ptr;
1084                *fw_ptr += evt->plen;
1085                remain -= evt->plen;
1086        }
1087
1088        /* Every HCI commands in the firmware file has its correspond event.
1089         * If event is not found or remain is smaller than zero, the firmware
1090         * file is corrupted.
1091         */
1092        if (!evt || !evt_param || remain < 0) {
1093                BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
1094                return -EFAULT;
1095        }
1096
1097        skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1098                                cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1099        if (IS_ERR(skb)) {
1100                BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
1101                       hdev->name, cmd->opcode, PTR_ERR(skb));
1102                return PTR_ERR(skb);
1103        }
1104
1105        /* It ensures that the returned event matches the event data read from
1106         * the firmware file. At fist, it checks the length and then
1107         * the contents of the event.
1108         */
1109        if (skb->len != evt->plen) {
1110                BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
1111                       le16_to_cpu(cmd->opcode));
1112                kfree_skb(skb);
1113                return -EFAULT;
1114        }
1115
1116        if (memcmp(skb->data, evt_param, evt->plen)) {
1117                BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
1118                       hdev->name, le16_to_cpu(cmd->opcode));
1119                kfree_skb(skb);
1120                return -EFAULT;
1121        }
1122        kfree_skb(skb);
1123
1124        return 0;
1125}
1126
1127static int btusb_setup_intel(struct hci_dev *hdev)
1128{
1129        struct sk_buff *skb;
1130        const struct firmware *fw;
1131        const u8 *fw_ptr;
1132        int disable_patch;
1133        struct intel_version *ver;
1134
1135        const u8 mfg_enable[] = { 0x01, 0x00 };
1136        const u8 mfg_disable[] = { 0x00, 0x00 };
1137        const u8 mfg_reset_deactivate[] = { 0x00, 0x01 };
1138        const u8 mfg_reset_activate[] = { 0x00, 0x02 };
1139
1140        BT_DBG("%s", hdev->name);
1141
1142        /* The controller has a bug with the first HCI command sent to it
1143         * returning number of completed commands as zero. This would stall the
1144         * command processing in the Bluetooth core.
1145         *
1146         * As a workaround, send HCI Reset command first which will reset the
1147         * number of completed commands and allow normal command processing
1148         * from now on.
1149         */
1150        skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1151        if (IS_ERR(skb)) {
1152                BT_ERR("%s sending initial HCI reset command failed (%ld)",
1153                       hdev->name, PTR_ERR(skb));
1154                return PTR_ERR(skb);
1155        }
1156        kfree_skb(skb);
1157
1158        /* Read Intel specific controller version first to allow selection of
1159         * which firmware file to load.
1160         *
1161         * The returned information are hardware variant and revision plus
1162         * firmware variant, revision and build number.
1163         */
1164        skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
1165        if (IS_ERR(skb)) {
1166                BT_ERR("%s reading Intel fw version command failed (%ld)",
1167                       hdev->name, PTR_ERR(skb));
1168                return PTR_ERR(skb);
1169        }
1170
1171        if (skb->len != sizeof(*ver)) {
1172                BT_ERR("%s Intel version event length mismatch", hdev->name);
1173                kfree_skb(skb);
1174                return -EIO;
1175        }
1176
1177        ver = (struct intel_version *)skb->data;
1178        if (ver->status) {
1179                BT_ERR("%s Intel fw version event failed (%02x)", hdev->name,
1180                       ver->status);
1181                kfree_skb(skb);
1182                return -bt_to_errno(ver->status);
1183        }
1184
1185        BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
1186                hdev->name, ver->hw_platform, ver->hw_variant,
1187                ver->hw_revision, ver->fw_variant,  ver->fw_revision,
1188                ver->fw_build_num, ver->fw_build_ww, ver->fw_build_yy,
1189                ver->fw_patch_num);
1190
1191        /* fw_patch_num indicates the version of patch the device currently
1192         * have. If there is no patch data in the device, it is always 0x00.
1193         * So, if it is other than 0x00, no need to patch the deivce again.
1194         */
1195        if (ver->fw_patch_num) {
1196                BT_INFO("%s: Intel device is already patched. patch num: %02x",
1197                        hdev->name, ver->fw_patch_num);
1198                kfree_skb(skb);
1199                return 0;
1200        }
1201
1202        /* Opens the firmware patch file based on the firmware version read
1203         * from the controller. If it fails to open the matching firmware
1204         * patch file, it tries to open the default firmware patch file.
1205         * If no patch file is found, allow the device to operate without
1206         * a patch.
1207         */
1208        fw = btusb_setup_intel_get_fw(hdev, ver);
1209        if (!fw) {
1210                kfree_skb(skb);
1211                return 0;
1212        }
1213        fw_ptr = fw->data;
1214
1215        /* This Intel specific command enables the manufacturer mode of the
1216         * controller.
1217         *
1218         * Only while this mode is enabled, the driver can download the
1219         * firmware patch data and configuration parameters.
1220         */
1221        skb = __hci_cmd_sync(hdev, 0xfc11, 2, mfg_enable, HCI_INIT_TIMEOUT);
1222        if (IS_ERR(skb)) {
1223                BT_ERR("%s entering Intel manufacturer mode failed (%ld)",
1224                       hdev->name, PTR_ERR(skb));
1225                release_firmware(fw);
1226                return PTR_ERR(skb);
1227        }
1228
1229        if (skb->data[0]) {
1230                u8 evt_status = skb->data[0];
1231                BT_ERR("%s enable Intel manufacturer mode event failed (%02x)",
1232                       hdev->name, evt_status);
1233                kfree_skb(skb);
1234                release_firmware(fw);
1235                return -bt_to_errno(evt_status);
1236        }
1237        kfree_skb(skb);
1238
1239        disable_patch = 1;
1240
1241        /* The firmware data file consists of list of Intel specific HCI
1242         * commands and its expected events. The first byte indicates the
1243         * type of the message, either HCI command or HCI event.
1244         *
1245         * It reads the command and its expected event from the firmware file,
1246         * and send to the controller. Once __hci_cmd_sync_ev() returns,
1247         * the returned event is compared with the event read from the firmware
1248         * file and it will continue until all the messages are downloaded to
1249         * the controller.
1250         *
1251         * Once the firmware patching is completed successfully,
1252         * the manufacturer mode is disabled with reset and activating the
1253         * downloaded patch.
1254         *
1255         * If the firmware patching fails, the manufacturer mode is
1256         * disabled with reset and deactivating the patch.
1257         *
1258         * If the default patch file is used, no reset is done when disabling
1259         * the manufacturer.
1260         */
1261        while (fw->size > fw_ptr - fw->data) {
1262                int ret;
1263
1264                ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
1265                                                 &disable_patch);
1266                if (ret < 0)
1267                        goto exit_mfg_deactivate;
1268        }
1269
1270        release_firmware(fw);
1271
1272        if (disable_patch)
1273                goto exit_mfg_disable;
1274
1275        /* Patching completed successfully and disable the manufacturer mode
1276         * with reset and activate the downloaded firmware patches.
1277         */
1278        skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_activate),
1279                             mfg_reset_activate, HCI_INIT_TIMEOUT);
1280        if (IS_ERR(skb)) {
1281                BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1282                       hdev->name, PTR_ERR(skb));
1283                return PTR_ERR(skb);
1284        }
1285        kfree_skb(skb);
1286
1287        BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
1288                hdev->name);
1289
1290        return 0;
1291
1292exit_mfg_disable:
1293        /* Disable the manufacturer mode without reset */
1294        skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_disable), mfg_disable,
1295                             HCI_INIT_TIMEOUT);
1296        if (IS_ERR(skb)) {
1297                BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1298                       hdev->name, PTR_ERR(skb));
1299                return PTR_ERR(skb);
1300        }
1301        kfree_skb(skb);
1302
1303        BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
1304        return 0;
1305
1306exit_mfg_deactivate:
1307        release_firmware(fw);
1308
1309        /* Patching failed. Disable the manufacturer mode with reset and
1310         * deactivate the downloaded firmware patches.
1311         */
1312        skb = __hci_cmd_sync(hdev, 0xfc11, sizeof(mfg_reset_deactivate),
1313                             mfg_reset_deactivate, HCI_INIT_TIMEOUT);
1314        if (IS_ERR(skb)) {
1315                BT_ERR("%s exiting Intel manufacturer mode failed (%ld)",
1316                       hdev->name, PTR_ERR(skb));
1317                return PTR_ERR(skb);
1318        }
1319        kfree_skb(skb);
1320
1321        BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
1322                hdev->name);
1323
1324        return 0;
1325}
1326
1327static int btusb_probe(struct usb_interface *intf,
1328                                const struct usb_device_id *id)
1329{
1330        struct usb_endpoint_descriptor *ep_desc;
1331        struct btusb_data *data;
1332        struct hci_dev *hdev;
1333        int i, err;
1334
1335        BT_DBG("intf %p id %p", intf, id);
1336
1337        /* interface numbers are hardcoded in the spec */
1338        if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
1339                return -ENODEV;
1340
1341        if (!id->driver_info) {
1342                const struct usb_device_id *match;
1343                match = usb_match_id(intf, blacklist_table);
1344                if (match)
1345                        id = match;
1346        }
1347
1348        if (id->driver_info == BTUSB_IGNORE)
1349                return -ENODEV;
1350
1351        if (ignore_dga && id->driver_info & BTUSB_DIGIANSWER)
1352                return -ENODEV;
1353
1354        if (ignore_csr && id->driver_info & BTUSB_CSR)
1355                return -ENODEV;
1356
1357        if (ignore_sniffer && id->driver_info & BTUSB_SNIFFER)
1358                return -ENODEV;
1359
1360        if (id->driver_info & BTUSB_ATH3012) {
1361                struct usb_device *udev = interface_to_usbdev(intf);
1362
1363                /* Old firmware would otherwise let ath3k driver load
1364                 * patch and sysconfig files */
1365                if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
1366                        return -ENODEV;
1367        }
1368
1369        data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
1370        if (!data)
1371                return -ENOMEM;
1372
1373        for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1374                ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1375
1376                if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
1377                        data->intr_ep = ep_desc;
1378                        continue;
1379                }
1380
1381                if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
1382                        data->bulk_tx_ep = ep_desc;
1383                        continue;
1384                }
1385
1386                if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
1387                        data->bulk_rx_ep = ep_desc;
1388                        continue;
1389                }
1390        }
1391
1392        if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
1393                return -ENODEV;
1394
1395        data->cmdreq_type = USB_TYPE_CLASS;
1396
1397        data->udev = interface_to_usbdev(intf);
1398        data->intf = intf;
1399
1400        spin_lock_init(&data->lock);
1401
1402        INIT_WORK(&data->work, btusb_work);
1403        INIT_WORK(&data->waker, btusb_waker);
1404        spin_lock_init(&data->txlock);
1405
1406        init_usb_anchor(&data->tx_anchor);
1407        init_usb_anchor(&data->intr_anchor);
1408        init_usb_anchor(&data->bulk_anchor);
1409        init_usb_anchor(&data->isoc_anchor);
1410        init_usb_anchor(&data->deferred);
1411
1412        hdev = hci_alloc_dev();
1413        if (!hdev)
1414                return -ENOMEM;
1415
1416        hdev->bus = HCI_USB;
1417        hci_set_drvdata(hdev, data);
1418
1419        data->hdev = hdev;
1420
1421        SET_HCIDEV_DEV(hdev, &intf->dev);
1422
1423        hdev->open   = btusb_open;
1424        hdev->close  = btusb_close;
1425        hdev->flush  = btusb_flush;
1426        hdev->send   = btusb_send_frame;
1427        hdev->notify = btusb_notify;
1428
1429        if (id->driver_info & BTUSB_BCM92035)
1430                hdev->setup = btusb_setup_bcm92035;
1431
1432        if (id->driver_info & BTUSB_INTEL)
1433                hdev->setup = btusb_setup_intel;
1434
1435        /* Interface numbers are hardcoded in the specification */
1436        data->isoc = usb_ifnum_to_if(data->udev, 1);
1437
1438        if (!reset)
1439                set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1440
1441        if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
1442                if (!disable_scofix)
1443                        set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
1444        }
1445
1446        if (id->driver_info & BTUSB_BROKEN_ISOC)
1447                data->isoc = NULL;
1448
1449        if (id->driver_info & BTUSB_DIGIANSWER) {
1450                data->cmdreq_type = USB_TYPE_VENDOR;
1451                set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1452        }
1453
1454        if (id->driver_info & BTUSB_CSR) {
1455                struct usb_device *udev = data->udev;
1456
1457                /* Old firmware would otherwise execute USB reset */
1458                if (le16_to_cpu(udev->descriptor.bcdDevice) < 0x117)
1459                        set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1460        }
1461
1462        if (id->driver_info & BTUSB_SNIFFER) {
1463                struct usb_device *udev = data->udev;
1464
1465                /* New sniffer firmware has crippled HCI interface */
1466                if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
1467                        set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
1468
1469                data->isoc = NULL;
1470        }
1471
1472        if (data->isoc) {
1473                err = usb_driver_claim_interface(&btusb_driver,
1474                                                        data->isoc, data);
1475                if (err < 0) {
1476                        hci_free_dev(hdev);
1477                        return err;
1478                }
1479        }
1480
1481        err = hci_register_dev(hdev);
1482        if (err < 0) {
1483                hci_free_dev(hdev);
1484                return err;
1485        }
1486
1487        usb_set_intfdata(intf, data);
1488
1489        return 0;
1490}
1491
1492static void btusb_disconnect(struct usb_interface *intf)
1493{
1494        struct btusb_data *data = usb_get_intfdata(intf);
1495        struct hci_dev *hdev;
1496
1497        BT_DBG("intf %p", intf);
1498
1499        if (!data)
1500                return;
1501
1502        hdev = data->hdev;
1503        usb_set_intfdata(data->intf, NULL);
1504
1505        if (data->isoc)
1506                usb_set_intfdata(data->isoc, NULL);
1507
1508        hci_unregister_dev(hdev);
1509
1510        if (intf == data->isoc)
1511                usb_driver_release_interface(&btusb_driver, data->intf);
1512        else if (data->isoc)
1513                usb_driver_release_interface(&btusb_driver, data->isoc);
1514
1515        hci_free_dev(hdev);
1516}
1517
1518#ifdef CONFIG_PM
1519static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
1520{
1521        struct btusb_data *data = usb_get_intfdata(intf);
1522
1523        BT_DBG("intf %p", intf);
1524
1525        if (data->suspend_count++)
1526                return 0;
1527
1528        spin_lock_irq(&data->txlock);
1529        if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
1530                set_bit(BTUSB_SUSPENDING, &data->flags);
1531                spin_unlock_irq(&data->txlock);
1532        } else {
1533                spin_unlock_irq(&data->txlock);
1534                data->suspend_count--;
1535                return -EBUSY;
1536        }
1537
1538        cancel_work_sync(&data->work);
1539
1540        btusb_stop_traffic(data);
1541        usb_kill_anchored_urbs(&data->tx_anchor);
1542
1543        return 0;
1544}
1545
1546static void play_deferred(struct btusb_data *data)
1547{
1548        struct urb *urb;
1549        int err;
1550
1551        while ((urb = usb_get_from_anchor(&data->deferred))) {
1552                err = usb_submit_urb(urb, GFP_ATOMIC);
1553                if (err < 0)
1554                        break;
1555
1556                data->tx_in_flight++;
1557        }
1558        usb_scuttle_anchored_urbs(&data->deferred);
1559}
1560
1561static int btusb_resume(struct usb_interface *intf)
1562{
1563        struct btusb_data *data = usb_get_intfdata(intf);
1564        struct hci_dev *hdev = data->hdev;
1565        int err = 0;
1566
1567        BT_DBG("intf %p", intf);
1568
1569        if (--data->suspend_count)
1570                return 0;
1571
1572        if (!test_bit(HCI_RUNNING, &hdev->flags))
1573                goto done;
1574
1575        if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
1576                err = btusb_submit_intr_urb(hdev, GFP_NOIO);
1577                if (err < 0) {
1578                        clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1579                        goto failed;
1580                }
1581        }
1582
1583        if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
1584                err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
1585                if (err < 0) {
1586                        clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1587                        goto failed;
1588                }
1589
1590                btusb_submit_bulk_urb(hdev, GFP_NOIO);
1591        }
1592
1593        if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1594                if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
1595                        clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1596                else
1597                        btusb_submit_isoc_urb(hdev, GFP_NOIO);
1598        }
1599
1600        spin_lock_irq(&data->txlock);
1601        play_deferred(data);
1602        clear_bit(BTUSB_SUSPENDING, &data->flags);
1603        spin_unlock_irq(&data->txlock);
1604        schedule_work(&data->work);
1605
1606        return 0;
1607
1608failed:
1609        usb_scuttle_anchored_urbs(&data->deferred);
1610done:
1611        spin_lock_irq(&data->txlock);
1612        clear_bit(BTUSB_SUSPENDING, &data->flags);
1613        spin_unlock_irq(&data->txlock);
1614
1615        return err;
1616}
1617#endif
1618
1619static struct usb_driver btusb_driver = {
1620        .name           = "btusb",
1621        .probe          = btusb_probe,
1622        .disconnect     = btusb_disconnect,
1623#ifdef CONFIG_PM
1624        .suspend        = btusb_suspend,
1625        .resume         = btusb_resume,
1626        .reset_resume   = btusb_resume,
1627#endif
1628        .id_table       = btusb_table,
1629        .supports_autosuspend = 1,
1630        .disable_hub_initiated_lpm = 1,
1631};
1632
1633module_usb_driver(btusb_driver);
1634
1635module_param(ignore_dga, bool, 0644);
1636MODULE_PARM_DESC(ignore_dga, "Ignore devices with id 08fd:0001");
1637
1638module_param(ignore_csr, bool, 0644);
1639MODULE_PARM_DESC(ignore_csr, "Ignore devices with id 0a12:0001");
1640
1641module_param(ignore_sniffer, bool, 0644);
1642MODULE_PARM_DESC(ignore_sniffer, "Ignore devices with id 0a12:0002");
1643
1644module_param(disable_scofix, bool, 0644);
1645MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
1646
1647module_param(force_scofix, bool, 0644);
1648MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
1649
1650module_param(reset, bool, 0644);
1651MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
1652
1653MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
1654MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
1655MODULE_VERSION(VERSION);
1656MODULE_LICENSE("GPL");
1657
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