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Linux/drivers/bluetooth/btusb.c

  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 #include <asm/unaligned.h>
 28 
 29 #include <net/bluetooth/bluetooth.h>
 30 #include <net/bluetooth/hci_core.h>
 31 
 32 #include "btintel.h"
 33 #include "btbcm.h"
 34 #include "btrtl.h"
 35 
 36 #define VERSION "0.8"
 37 
 38 static bool disable_scofix;
 39 static bool force_scofix;
 40 
 41 static bool reset = true;
 42 
 43 static struct usb_driver btusb_driver;
 44 
 45 #define BTUSB_IGNORE            0x01
 46 #define BTUSB_DIGIANSWER        0x02
 47 #define BTUSB_CSR               0x04
 48 #define BTUSB_SNIFFER           0x08
 49 #define BTUSB_BCM92035          0x10
 50 #define BTUSB_BROKEN_ISOC       0x20
 51 #define BTUSB_WRONG_SCO_MTU     0x40
 52 #define BTUSB_ATH3012           0x80
 53 #define BTUSB_INTEL             0x100
 54 #define BTUSB_INTEL_BOOT        0x200
 55 #define BTUSB_BCM_PATCHRAM      0x400
 56 #define BTUSB_MARVELL           0x800
 57 #define BTUSB_SWAVE             0x1000
 58 #define BTUSB_INTEL_NEW         0x2000
 59 #define BTUSB_AMP               0x4000
 60 #define BTUSB_QCA_ROME          0x8000
 61 #define BTUSB_BCM_APPLE         0x10000
 62 #define BTUSB_REALTEK           0x20000
 63 #define BTUSB_BCM2045           0x40000
 64 #define BTUSB_IFNUM_2           0x80000
 65 
 66 static const struct usb_device_id btusb_table[] = {
 67         /* Generic Bluetooth USB device */
 68         { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
 69 
 70         /* Generic Bluetooth AMP device */
 71         { USB_DEVICE_INFO(0xe0, 0x01, 0x04), .driver_info = BTUSB_AMP },
 72 
 73         /* Generic Bluetooth USB interface */
 74         { USB_INTERFACE_INFO(0xe0, 0x01, 0x01) },
 75 
 76         /* Apple-specific (Broadcom) devices */
 77         { USB_VENDOR_AND_INTERFACE_INFO(0x05ac, 0xff, 0x01, 0x01),
 78           .driver_info = BTUSB_BCM_APPLE | BTUSB_IFNUM_2 },
 79 
 80         /* MediaTek MT76x0E */
 81         { USB_DEVICE(0x0e8d, 0x763f) },
 82 
 83         /* Broadcom SoftSailing reporting vendor specific */
 84         { USB_DEVICE(0x0a5c, 0x21e1) },
 85 
 86         /* Apple MacBookPro 7,1 */
 87         { USB_DEVICE(0x05ac, 0x8213) },
 88 
 89         /* Apple iMac11,1 */
 90         { USB_DEVICE(0x05ac, 0x8215) },
 91 
 92         /* Apple MacBookPro6,2 */
 93         { USB_DEVICE(0x05ac, 0x8218) },
 94 
 95         /* Apple MacBookAir3,1, MacBookAir3,2 */
 96         { USB_DEVICE(0x05ac, 0x821b) },
 97 
 98         /* Apple MacBookAir4,1 */
 99         { USB_DEVICE(0x05ac, 0x821f) },
100 
101         /* Apple MacBookPro8,2 */
102         { USB_DEVICE(0x05ac, 0x821a) },
103 
104         /* Apple MacMini5,1 */
105         { USB_DEVICE(0x05ac, 0x8281) },
106 
107         /* AVM BlueFRITZ! USB v2.0 */
108         { USB_DEVICE(0x057c, 0x3800), .driver_info = BTUSB_SWAVE },
109 
110         /* Bluetooth Ultraport Module from IBM */
111         { USB_DEVICE(0x04bf, 0x030a) },
112 
113         /* ALPS Modules with non-standard id */
114         { USB_DEVICE(0x044e, 0x3001) },
115         { USB_DEVICE(0x044e, 0x3002) },
116 
117         /* Ericsson with non-standard id */
118         { USB_DEVICE(0x0bdb, 0x1002) },
119 
120         /* Canyon CN-BTU1 with HID interfaces */
121         { USB_DEVICE(0x0c10, 0x0000) },
122 
123         /* Broadcom BCM20702A0 */
124         { USB_DEVICE(0x413c, 0x8197) },
125 
126         /* Broadcom BCM20702B0 (Dynex/Insignia) */
127         { USB_DEVICE(0x19ff, 0x0239), .driver_info = BTUSB_BCM_PATCHRAM },
128 
129         /* Broadcom BCM43142A0 (Foxconn/Lenovo) */
130         { USB_DEVICE(0x105b, 0xe065), .driver_info = BTUSB_BCM_PATCHRAM },
131 
132         /* Foxconn - Hon Hai */
133         { USB_VENDOR_AND_INTERFACE_INFO(0x0489, 0xff, 0x01, 0x01),
134           .driver_info = BTUSB_BCM_PATCHRAM },
135 
136         /* Lite-On Technology - Broadcom based */
137         { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
138           .driver_info = BTUSB_BCM_PATCHRAM },
139 
140         /* Broadcom devices with vendor specific id */
141         { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
142           .driver_info = BTUSB_BCM_PATCHRAM },
143 
144         /* ASUSTek Computer - Broadcom based */
145         { USB_VENDOR_AND_INTERFACE_INFO(0x0b05, 0xff, 0x01, 0x01),
146           .driver_info = BTUSB_BCM_PATCHRAM },
147 
148         /* Belkin F8065bf - Broadcom based */
149         { USB_VENDOR_AND_INTERFACE_INFO(0x050d, 0xff, 0x01, 0x01),
150           .driver_info = BTUSB_BCM_PATCHRAM },
151 
152         /* IMC Networks - Broadcom based */
153         { USB_VENDOR_AND_INTERFACE_INFO(0x13d3, 0xff, 0x01, 0x01),
154           .driver_info = BTUSB_BCM_PATCHRAM },
155 
156         /* Toshiba Corp - Broadcom based */
157         { USB_VENDOR_AND_INTERFACE_INFO(0x0930, 0xff, 0x01, 0x01),
158           .driver_info = BTUSB_BCM_PATCHRAM },
159 
160         /* Intel Bluetooth USB Bootloader (RAM module) */
161         { USB_DEVICE(0x8087, 0x0a5a),
162           .driver_info = BTUSB_INTEL_BOOT | BTUSB_BROKEN_ISOC },
163 
164         { }     /* Terminating entry */
165 };
166 
167 MODULE_DEVICE_TABLE(usb, btusb_table);
168 
169 static const struct usb_device_id blacklist_table[] = {
170         /* CSR BlueCore devices */
171         { USB_DEVICE(0x0a12, 0x0001), .driver_info = BTUSB_CSR },
172 
173         /* Broadcom BCM2033 without firmware */
174         { USB_DEVICE(0x0a5c, 0x2033), .driver_info = BTUSB_IGNORE },
175 
176         /* Broadcom BCM2045 devices */
177         { USB_DEVICE(0x0a5c, 0x2045), .driver_info = BTUSB_BCM2045 },
178 
179         /* Atheros 3011 with sflash firmware */
180         { USB_DEVICE(0x0489, 0xe027), .driver_info = BTUSB_IGNORE },
181         { USB_DEVICE(0x0489, 0xe03d), .driver_info = BTUSB_IGNORE },
182         { USB_DEVICE(0x04f2, 0xaff1), .driver_info = BTUSB_IGNORE },
183         { USB_DEVICE(0x0930, 0x0215), .driver_info = BTUSB_IGNORE },
184         { USB_DEVICE(0x0cf3, 0x3002), .driver_info = BTUSB_IGNORE },
185         { USB_DEVICE(0x0cf3, 0xe019), .driver_info = BTUSB_IGNORE },
186         { USB_DEVICE(0x13d3, 0x3304), .driver_info = BTUSB_IGNORE },
187 
188         /* Atheros AR9285 Malbec with sflash firmware */
189         { USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
190 
191         /* Atheros 3012 with sflash firmware */
192         { USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
193         { USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
194         { USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
195         { USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
196         { USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
197         { USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
198         { USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
199         { USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
200         { USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
201         { USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
202         { USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
203         { USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
204         { USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
205         { USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
206         { USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
207         { USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
208         { USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
209         { USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
210         { USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
211         { USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
212         { USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
213         { USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
214         { USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
215         { USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
216         { USB_DEVICE(0x0cf3, 0x0036), .driver_info = BTUSB_ATH3012 },
217         { USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
218         { USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
219         { USB_DEVICE(0x0cf3, 0x311d), .driver_info = BTUSB_ATH3012 },
220         { USB_DEVICE(0x0cf3, 0x311e), .driver_info = BTUSB_ATH3012 },
221         { USB_DEVICE(0x0cf3, 0x311f), .driver_info = BTUSB_ATH3012 },
222         { USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
223         { USB_DEVICE(0x0cf3, 0x817a), .driver_info = BTUSB_ATH3012 },
224         { USB_DEVICE(0x0cf3, 0x817b), .driver_info = BTUSB_ATH3012 },
225         { USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
226         { USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
227         { USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
228         { USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
229         { USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
230         { USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
231         { USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
232         { USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
233         { USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
234         { USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
235         { USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
236         { USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
237         { USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
238         { USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
239 
240         /* Atheros AR5BBU12 with sflash firmware */
241         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
242 
243         /* Atheros AR5BBU12 with sflash firmware */
244         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
245         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
246 
247         /* QCA ROME chipset */
248         { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME },
249         { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME },
250         { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME },
251 
252         /* Broadcom BCM2035 */
253         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
254         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
255         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
256 
257         /* Broadcom BCM2045 */
258         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
259         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
260 
261         /* IBM/Lenovo ThinkPad with Broadcom chip */
262         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
263         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
264 
265         /* HP laptop with Broadcom chip */
266         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
267 
268         /* Dell laptop with Broadcom chip */
269         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
270 
271         /* Dell Wireless 370 and 410 devices */
272         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
273         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
274 
275         /* Belkin F8T012 and F8T013 devices */
276         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
277         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
278 
279         /* Asus WL-BTD202 device */
280         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
281 
282         /* Kensington Bluetooth USB adapter */
283         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
284 
285         /* RTX Telecom based adapters with buggy SCO support */
286         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
287         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
288 
289         /* CONWISE Technology based adapters with buggy SCO support */
290         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
291 
292         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
293         { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
294 
295         /* Digianswer devices */
296         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
297         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
298 
299         /* CSR BlueCore Bluetooth Sniffer */
300         { USB_DEVICE(0x0a12, 0x0002),
301           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
302 
303         /* Frontline ComProbe Bluetooth Sniffer */
304         { USB_DEVICE(0x16d3, 0x0002),
305           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
306 
307         /* Marvell Bluetooth devices */
308         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
309         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
310 
311         /* Intel Bluetooth devices */
312         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
313         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
314         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
315         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW },
316 
317         /* Other Intel Bluetooth devices */
318         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
319           .driver_info = BTUSB_IGNORE },
320 
321         /* Realtek Bluetooth devices */
322         { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
323           .driver_info = BTUSB_REALTEK },
324 
325         /* Additional Realtek 8723AE Bluetooth devices */
326         { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
327         { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
328 
329         /* Additional Realtek 8723BE Bluetooth devices */
330         { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
331         { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
332         { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
333         { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
334         { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
335 
336         /* Additional Realtek 8821AE Bluetooth devices */
337         { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
338         { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
339         { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
340         { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
341         { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
342 
343         /* Silicon Wave based devices */
344         { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
345 
346         { }     /* Terminating entry */
347 };
348 
349 #define BTUSB_MAX_ISOC_FRAMES   10
350 
351 #define BTUSB_INTR_RUNNING      0
352 #define BTUSB_BULK_RUNNING      1
353 #define BTUSB_ISOC_RUNNING      2
354 #define BTUSB_SUSPENDING        3
355 #define BTUSB_DID_ISO_RESUME    4
356 #define BTUSB_BOOTLOADER        5
357 #define BTUSB_DOWNLOADING       6
358 #define BTUSB_FIRMWARE_LOADED   7
359 #define BTUSB_FIRMWARE_FAILED   8
360 #define BTUSB_BOOTING           9
361 #define BTUSB_RESET_RESUME      10
362 #define BTUSB_DIAG_RUNNING      11
363 
364 struct btusb_data {
365         struct hci_dev       *hdev;
366         struct usb_device    *udev;
367         struct usb_interface *intf;
368         struct usb_interface *isoc;
369         struct usb_interface *diag;
370 
371         unsigned long flags;
372 
373         struct work_struct work;
374         struct work_struct waker;
375 
376         struct usb_anchor deferred;
377         struct usb_anchor tx_anchor;
378         int tx_in_flight;
379         spinlock_t txlock;
380 
381         struct usb_anchor intr_anchor;
382         struct usb_anchor bulk_anchor;
383         struct usb_anchor isoc_anchor;
384         struct usb_anchor diag_anchor;
385         spinlock_t rxlock;
386 
387         struct sk_buff *evt_skb;
388         struct sk_buff *acl_skb;
389         struct sk_buff *sco_skb;
390 
391         struct usb_endpoint_descriptor *intr_ep;
392         struct usb_endpoint_descriptor *bulk_tx_ep;
393         struct usb_endpoint_descriptor *bulk_rx_ep;
394         struct usb_endpoint_descriptor *isoc_tx_ep;
395         struct usb_endpoint_descriptor *isoc_rx_ep;
396         struct usb_endpoint_descriptor *diag_tx_ep;
397         struct usb_endpoint_descriptor *diag_rx_ep;
398 
399         __u8 cmdreq_type;
400         __u8 cmdreq;
401 
402         unsigned int sco_num;
403         int isoc_altsetting;
404         int suspend_count;
405 
406         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
407         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
408 
409         int (*setup_on_usb)(struct hci_dev *hdev);
410 };
411 
412 static inline void btusb_free_frags(struct btusb_data *data)
413 {
414         unsigned long flags;
415 
416         spin_lock_irqsave(&data->rxlock, flags);
417 
418         kfree_skb(data->evt_skb);
419         data->evt_skb = NULL;
420 
421         kfree_skb(data->acl_skb);
422         data->acl_skb = NULL;
423 
424         kfree_skb(data->sco_skb);
425         data->sco_skb = NULL;
426 
427         spin_unlock_irqrestore(&data->rxlock, flags);
428 }
429 
430 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
431 {
432         struct sk_buff *skb;
433         int err = 0;
434 
435         spin_lock(&data->rxlock);
436         skb = data->evt_skb;
437 
438         while (count) {
439                 int len;
440 
441                 if (!skb) {
442                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
443                         if (!skb) {
444                                 err = -ENOMEM;
445                                 break;
446                         }
447 
448                         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
449                         hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
450                 }
451 
452                 len = min_t(uint, hci_skb_expect(skb), count);
453                 memcpy(skb_put(skb, len), buffer, len);
454 
455                 count -= len;
456                 buffer += len;
457                 hci_skb_expect(skb) -= len;
458 
459                 if (skb->len == HCI_EVENT_HDR_SIZE) {
460                         /* Complete event header */
461                         hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
462 
463                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
464                                 kfree_skb(skb);
465                                 skb = NULL;
466 
467                                 err = -EILSEQ;
468                                 break;
469                         }
470                 }
471 
472                 if (!hci_skb_expect(skb)) {
473                         /* Complete frame */
474                         data->recv_event(data->hdev, skb);
475                         skb = NULL;
476                 }
477         }
478 
479         data->evt_skb = skb;
480         spin_unlock(&data->rxlock);
481 
482         return err;
483 }
484 
485 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
486 {
487         struct sk_buff *skb;
488         int err = 0;
489 
490         spin_lock(&data->rxlock);
491         skb = data->acl_skb;
492 
493         while (count) {
494                 int len;
495 
496                 if (!skb) {
497                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
498                         if (!skb) {
499                                 err = -ENOMEM;
500                                 break;
501                         }
502 
503                         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
504                         hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
505                 }
506 
507                 len = min_t(uint, hci_skb_expect(skb), count);
508                 memcpy(skb_put(skb, len), buffer, len);
509 
510                 count -= len;
511                 buffer += len;
512                 hci_skb_expect(skb) -= len;
513 
514                 if (skb->len == HCI_ACL_HDR_SIZE) {
515                         __le16 dlen = hci_acl_hdr(skb)->dlen;
516 
517                         /* Complete ACL header */
518                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
519 
520                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
521                                 kfree_skb(skb);
522                                 skb = NULL;
523 
524                                 err = -EILSEQ;
525                                 break;
526                         }
527                 }
528 
529                 if (!hci_skb_expect(skb)) {
530                         /* Complete frame */
531                         hci_recv_frame(data->hdev, skb);
532                         skb = NULL;
533                 }
534         }
535 
536         data->acl_skb = skb;
537         spin_unlock(&data->rxlock);
538 
539         return err;
540 }
541 
542 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
543 {
544         struct sk_buff *skb;
545         int err = 0;
546 
547         spin_lock(&data->rxlock);
548         skb = data->sco_skb;
549 
550         while (count) {
551                 int len;
552 
553                 if (!skb) {
554                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
555                         if (!skb) {
556                                 err = -ENOMEM;
557                                 break;
558                         }
559 
560                         hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
561                         hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
562                 }
563 
564                 len = min_t(uint, hci_skb_expect(skb), count);
565                 memcpy(skb_put(skb, len), buffer, len);
566 
567                 count -= len;
568                 buffer += len;
569                 hci_skb_expect(skb) -= len;
570 
571                 if (skb->len == HCI_SCO_HDR_SIZE) {
572                         /* Complete SCO header */
573                         hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
574 
575                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
576                                 kfree_skb(skb);
577                                 skb = NULL;
578 
579                                 err = -EILSEQ;
580                                 break;
581                         }
582                 }
583 
584                 if (!hci_skb_expect(skb)) {
585                         /* Complete frame */
586                         hci_recv_frame(data->hdev, skb);
587                         skb = NULL;
588                 }
589         }
590 
591         data->sco_skb = skb;
592         spin_unlock(&data->rxlock);
593 
594         return err;
595 }
596 
597 static void btusb_intr_complete(struct urb *urb)
598 {
599         struct hci_dev *hdev = urb->context;
600         struct btusb_data *data = hci_get_drvdata(hdev);
601         int err;
602 
603         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
604                urb->actual_length);
605 
606         if (!test_bit(HCI_RUNNING, &hdev->flags))
607                 return;
608 
609         if (urb->status == 0) {
610                 hdev->stat.byte_rx += urb->actual_length;
611 
612                 if (btusb_recv_intr(data, urb->transfer_buffer,
613                                     urb->actual_length) < 0) {
614                         BT_ERR("%s corrupted event packet", hdev->name);
615                         hdev->stat.err_rx++;
616                 }
617         } else if (urb->status == -ENOENT) {
618                 /* Avoid suspend failed when usb_kill_urb */
619                 return;
620         }
621 
622         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
623                 return;
624 
625         usb_mark_last_busy(data->udev);
626         usb_anchor_urb(urb, &data->intr_anchor);
627 
628         err = usb_submit_urb(urb, GFP_ATOMIC);
629         if (err < 0) {
630                 /* -EPERM: urb is being killed;
631                  * -ENODEV: device got disconnected */
632                 if (err != -EPERM && err != -ENODEV)
633                         BT_ERR("%s urb %p failed to resubmit (%d)",
634                                hdev->name, urb, -err);
635                 usb_unanchor_urb(urb);
636         }
637 }
638 
639 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
640 {
641         struct btusb_data *data = hci_get_drvdata(hdev);
642         struct urb *urb;
643         unsigned char *buf;
644         unsigned int pipe;
645         int err, size;
646 
647         BT_DBG("%s", hdev->name);
648 
649         if (!data->intr_ep)
650                 return -ENODEV;
651 
652         urb = usb_alloc_urb(0, mem_flags);
653         if (!urb)
654                 return -ENOMEM;
655 
656         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
657 
658         buf = kmalloc(size, mem_flags);
659         if (!buf) {
660                 usb_free_urb(urb);
661                 return -ENOMEM;
662         }
663 
664         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
665 
666         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
667                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
668 
669         urb->transfer_flags |= URB_FREE_BUFFER;
670 
671         usb_anchor_urb(urb, &data->intr_anchor);
672 
673         err = usb_submit_urb(urb, mem_flags);
674         if (err < 0) {
675                 if (err != -EPERM && err != -ENODEV)
676                         BT_ERR("%s urb %p submission failed (%d)",
677                                hdev->name, urb, -err);
678                 usb_unanchor_urb(urb);
679         }
680 
681         usb_free_urb(urb);
682 
683         return err;
684 }
685 
686 static void btusb_bulk_complete(struct urb *urb)
687 {
688         struct hci_dev *hdev = urb->context;
689         struct btusb_data *data = hci_get_drvdata(hdev);
690         int err;
691 
692         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
693                urb->actual_length);
694 
695         if (!test_bit(HCI_RUNNING, &hdev->flags))
696                 return;
697 
698         if (urb->status == 0) {
699                 hdev->stat.byte_rx += urb->actual_length;
700 
701                 if (data->recv_bulk(data, urb->transfer_buffer,
702                                     urb->actual_length) < 0) {
703                         BT_ERR("%s corrupted ACL packet", hdev->name);
704                         hdev->stat.err_rx++;
705                 }
706         } else if (urb->status == -ENOENT) {
707                 /* Avoid suspend failed when usb_kill_urb */
708                 return;
709         }
710 
711         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
712                 return;
713 
714         usb_anchor_urb(urb, &data->bulk_anchor);
715         usb_mark_last_busy(data->udev);
716 
717         err = usb_submit_urb(urb, GFP_ATOMIC);
718         if (err < 0) {
719                 /* -EPERM: urb is being killed;
720                  * -ENODEV: device got disconnected */
721                 if (err != -EPERM && err != -ENODEV)
722                         BT_ERR("%s urb %p failed to resubmit (%d)",
723                                hdev->name, urb, -err);
724                 usb_unanchor_urb(urb);
725         }
726 }
727 
728 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
729 {
730         struct btusb_data *data = hci_get_drvdata(hdev);
731         struct urb *urb;
732         unsigned char *buf;
733         unsigned int pipe;
734         int err, size = HCI_MAX_FRAME_SIZE;
735 
736         BT_DBG("%s", hdev->name);
737 
738         if (!data->bulk_rx_ep)
739                 return -ENODEV;
740 
741         urb = usb_alloc_urb(0, mem_flags);
742         if (!urb)
743                 return -ENOMEM;
744 
745         buf = kmalloc(size, mem_flags);
746         if (!buf) {
747                 usb_free_urb(urb);
748                 return -ENOMEM;
749         }
750 
751         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
752 
753         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
754                           btusb_bulk_complete, hdev);
755 
756         urb->transfer_flags |= URB_FREE_BUFFER;
757 
758         usb_mark_last_busy(data->udev);
759         usb_anchor_urb(urb, &data->bulk_anchor);
760 
761         err = usb_submit_urb(urb, mem_flags);
762         if (err < 0) {
763                 if (err != -EPERM && err != -ENODEV)
764                         BT_ERR("%s urb %p submission failed (%d)",
765                                hdev->name, urb, -err);
766                 usb_unanchor_urb(urb);
767         }
768 
769         usb_free_urb(urb);
770 
771         return err;
772 }
773 
774 static void btusb_isoc_complete(struct urb *urb)
775 {
776         struct hci_dev *hdev = urb->context;
777         struct btusb_data *data = hci_get_drvdata(hdev);
778         int i, err;
779 
780         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
781                urb->actual_length);
782 
783         if (!test_bit(HCI_RUNNING, &hdev->flags))
784                 return;
785 
786         if (urb->status == 0) {
787                 for (i = 0; i < urb->number_of_packets; i++) {
788                         unsigned int offset = urb->iso_frame_desc[i].offset;
789                         unsigned int length = urb->iso_frame_desc[i].actual_length;
790 
791                         if (urb->iso_frame_desc[i].status)
792                                 continue;
793 
794                         hdev->stat.byte_rx += length;
795 
796                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
797                                             length) < 0) {
798                                 BT_ERR("%s corrupted SCO packet", hdev->name);
799                                 hdev->stat.err_rx++;
800                         }
801                 }
802         } else if (urb->status == -ENOENT) {
803                 /* Avoid suspend failed when usb_kill_urb */
804                 return;
805         }
806 
807         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
808                 return;
809 
810         usb_anchor_urb(urb, &data->isoc_anchor);
811 
812         err = usb_submit_urb(urb, GFP_ATOMIC);
813         if (err < 0) {
814                 /* -EPERM: urb is being killed;
815                  * -ENODEV: device got disconnected */
816                 if (err != -EPERM && err != -ENODEV)
817                         BT_ERR("%s urb %p failed to resubmit (%d)",
818                                hdev->name, urb, -err);
819                 usb_unanchor_urb(urb);
820         }
821 }
822 
823 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
824 {
825         int i, offset = 0;
826 
827         BT_DBG("len %d mtu %d", len, mtu);
828 
829         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
830                                         i++, offset += mtu, len -= mtu) {
831                 urb->iso_frame_desc[i].offset = offset;
832                 urb->iso_frame_desc[i].length = mtu;
833         }
834 
835         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
836                 urb->iso_frame_desc[i].offset = offset;
837                 urb->iso_frame_desc[i].length = len;
838                 i++;
839         }
840 
841         urb->number_of_packets = i;
842 }
843 
844 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
845 {
846         struct btusb_data *data = hci_get_drvdata(hdev);
847         struct urb *urb;
848         unsigned char *buf;
849         unsigned int pipe;
850         int err, size;
851 
852         BT_DBG("%s", hdev->name);
853 
854         if (!data->isoc_rx_ep)
855                 return -ENODEV;
856 
857         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
858         if (!urb)
859                 return -ENOMEM;
860 
861         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
862                                                 BTUSB_MAX_ISOC_FRAMES;
863 
864         buf = kmalloc(size, mem_flags);
865         if (!buf) {
866                 usb_free_urb(urb);
867                 return -ENOMEM;
868         }
869 
870         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
871 
872         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
873                          hdev, data->isoc_rx_ep->bInterval);
874 
875         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
876 
877         __fill_isoc_descriptor(urb, size,
878                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
879 
880         usb_anchor_urb(urb, &data->isoc_anchor);
881 
882         err = usb_submit_urb(urb, mem_flags);
883         if (err < 0) {
884                 if (err != -EPERM && err != -ENODEV)
885                         BT_ERR("%s urb %p submission failed (%d)",
886                                hdev->name, urb, -err);
887                 usb_unanchor_urb(urb);
888         }
889 
890         usb_free_urb(urb);
891 
892         return err;
893 }
894 
895 static void btusb_diag_complete(struct urb *urb)
896 {
897         struct hci_dev *hdev = urb->context;
898         struct btusb_data *data = hci_get_drvdata(hdev);
899         int err;
900 
901         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
902                urb->actual_length);
903 
904         if (urb->status == 0) {
905                 struct sk_buff *skb;
906 
907                 skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
908                 if (skb) {
909                         memcpy(skb_put(skb, urb->actual_length),
910                                urb->transfer_buffer, urb->actual_length);
911                         hci_recv_diag(hdev, skb);
912                 }
913         } else if (urb->status == -ENOENT) {
914                 /* Avoid suspend failed when usb_kill_urb */
915                 return;
916         }
917 
918         if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
919                 return;
920 
921         usb_anchor_urb(urb, &data->diag_anchor);
922         usb_mark_last_busy(data->udev);
923 
924         err = usb_submit_urb(urb, GFP_ATOMIC);
925         if (err < 0) {
926                 /* -EPERM: urb is being killed;
927                  * -ENODEV: device got disconnected */
928                 if (err != -EPERM && err != -ENODEV)
929                         BT_ERR("%s urb %p failed to resubmit (%d)",
930                                hdev->name, urb, -err);
931                 usb_unanchor_urb(urb);
932         }
933 }
934 
935 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
936 {
937         struct btusb_data *data = hci_get_drvdata(hdev);
938         struct urb *urb;
939         unsigned char *buf;
940         unsigned int pipe;
941         int err, size = HCI_MAX_FRAME_SIZE;
942 
943         BT_DBG("%s", hdev->name);
944 
945         if (!data->diag_rx_ep)
946                 return -ENODEV;
947 
948         urb = usb_alloc_urb(0, mem_flags);
949         if (!urb)
950                 return -ENOMEM;
951 
952         buf = kmalloc(size, mem_flags);
953         if (!buf) {
954                 usb_free_urb(urb);
955                 return -ENOMEM;
956         }
957 
958         pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
959 
960         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
961                           btusb_diag_complete, hdev);
962 
963         urb->transfer_flags |= URB_FREE_BUFFER;
964 
965         usb_mark_last_busy(data->udev);
966         usb_anchor_urb(urb, &data->diag_anchor);
967 
968         err = usb_submit_urb(urb, mem_flags);
969         if (err < 0) {
970                 if (err != -EPERM && err != -ENODEV)
971                         BT_ERR("%s urb %p submission failed (%d)",
972                                hdev->name, urb, -err);
973                 usb_unanchor_urb(urb);
974         }
975 
976         usb_free_urb(urb);
977 
978         return err;
979 }
980 
981 static void btusb_tx_complete(struct urb *urb)
982 {
983         struct sk_buff *skb = urb->context;
984         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
985         struct btusb_data *data = hci_get_drvdata(hdev);
986 
987         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
988                urb->actual_length);
989 
990         if (!test_bit(HCI_RUNNING, &hdev->flags))
991                 goto done;
992 
993         if (!urb->status)
994                 hdev->stat.byte_tx += urb->transfer_buffer_length;
995         else
996                 hdev->stat.err_tx++;
997 
998 done:
999         spin_lock(&data->txlock);
1000         data->tx_in_flight--;
1001         spin_unlock(&data->txlock);
1002 
1003         kfree(urb->setup_packet);
1004 
1005         kfree_skb(skb);
1006 }
1007 
1008 static void btusb_isoc_tx_complete(struct urb *urb)
1009 {
1010         struct sk_buff *skb = urb->context;
1011         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1012 
1013         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1014                urb->actual_length);
1015 
1016         if (!test_bit(HCI_RUNNING, &hdev->flags))
1017                 goto done;
1018 
1019         if (!urb->status)
1020                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1021         else
1022                 hdev->stat.err_tx++;
1023 
1024 done:
1025         kfree(urb->setup_packet);
1026 
1027         kfree_skb(skb);
1028 }
1029 
1030 static int btusb_open(struct hci_dev *hdev)
1031 {
1032         struct btusb_data *data = hci_get_drvdata(hdev);
1033         int err;
1034 
1035         BT_DBG("%s", hdev->name);
1036 
1037         /* Patching USB firmware files prior to starting any URBs of HCI path
1038          * It is more safe to use USB bulk channel for downloading USB patch
1039          */
1040         if (data->setup_on_usb) {
1041                 err = data->setup_on_usb(hdev);
1042                 if (err < 0)
1043                         return err;
1044         }
1045 
1046         err = usb_autopm_get_interface(data->intf);
1047         if (err < 0)
1048                 return err;
1049 
1050         data->intf->needs_remote_wakeup = 1;
1051 
1052         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1053                 goto done;
1054 
1055         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1056         if (err < 0)
1057                 goto failed;
1058 
1059         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1060         if (err < 0) {
1061                 usb_kill_anchored_urbs(&data->intr_anchor);
1062                 goto failed;
1063         }
1064 
1065         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1066         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1067 
1068         if (data->diag) {
1069                 if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1070                         set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1071         }
1072 
1073 done:
1074         usb_autopm_put_interface(data->intf);
1075         return 0;
1076 
1077 failed:
1078         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1079         usb_autopm_put_interface(data->intf);
1080         return err;
1081 }
1082 
1083 static void btusb_stop_traffic(struct btusb_data *data)
1084 {
1085         usb_kill_anchored_urbs(&data->intr_anchor);
1086         usb_kill_anchored_urbs(&data->bulk_anchor);
1087         usb_kill_anchored_urbs(&data->isoc_anchor);
1088         usb_kill_anchored_urbs(&data->diag_anchor);
1089 }
1090 
1091 static int btusb_close(struct hci_dev *hdev)
1092 {
1093         struct btusb_data *data = hci_get_drvdata(hdev);
1094         int err;
1095 
1096         BT_DBG("%s", hdev->name);
1097 
1098         cancel_work_sync(&data->work);
1099         cancel_work_sync(&data->waker);
1100 
1101         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1102         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1103         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1104         clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1105 
1106         btusb_stop_traffic(data);
1107         btusb_free_frags(data);
1108 
1109         err = usb_autopm_get_interface(data->intf);
1110         if (err < 0)
1111                 goto failed;
1112 
1113         data->intf->needs_remote_wakeup = 0;
1114         usb_autopm_put_interface(data->intf);
1115 
1116 failed:
1117         usb_scuttle_anchored_urbs(&data->deferred);
1118         return 0;
1119 }
1120 
1121 static int btusb_flush(struct hci_dev *hdev)
1122 {
1123         struct btusb_data *data = hci_get_drvdata(hdev);
1124 
1125         BT_DBG("%s", hdev->name);
1126 
1127         usb_kill_anchored_urbs(&data->tx_anchor);
1128         btusb_free_frags(data);
1129 
1130         return 0;
1131 }
1132 
1133 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1134 {
1135         struct btusb_data *data = hci_get_drvdata(hdev);
1136         struct usb_ctrlrequest *dr;
1137         struct urb *urb;
1138         unsigned int pipe;
1139 
1140         urb = usb_alloc_urb(0, GFP_KERNEL);
1141         if (!urb)
1142                 return ERR_PTR(-ENOMEM);
1143 
1144         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1145         if (!dr) {
1146                 usb_free_urb(urb);
1147                 return ERR_PTR(-ENOMEM);
1148         }
1149 
1150         dr->bRequestType = data->cmdreq_type;
1151         dr->bRequest     = data->cmdreq;
1152         dr->wIndex       = 0;
1153         dr->wValue       = 0;
1154         dr->wLength      = __cpu_to_le16(skb->len);
1155 
1156         pipe = usb_sndctrlpipe(data->udev, 0x00);
1157 
1158         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1159                              skb->data, skb->len, btusb_tx_complete, skb);
1160 
1161         skb->dev = (void *)hdev;
1162 
1163         return urb;
1164 }
1165 
1166 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1167 {
1168         struct btusb_data *data = hci_get_drvdata(hdev);
1169         struct urb *urb;
1170         unsigned int pipe;
1171 
1172         if (!data->bulk_tx_ep)
1173                 return ERR_PTR(-ENODEV);
1174 
1175         urb = usb_alloc_urb(0, GFP_KERNEL);
1176         if (!urb)
1177                 return ERR_PTR(-ENOMEM);
1178 
1179         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1180 
1181         usb_fill_bulk_urb(urb, data->udev, pipe,
1182                           skb->data, skb->len, btusb_tx_complete, skb);
1183 
1184         skb->dev = (void *)hdev;
1185 
1186         return urb;
1187 }
1188 
1189 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1190 {
1191         struct btusb_data *data = hci_get_drvdata(hdev);
1192         struct urb *urb;
1193         unsigned int pipe;
1194 
1195         if (!data->isoc_tx_ep)
1196                 return ERR_PTR(-ENODEV);
1197 
1198         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1199         if (!urb)
1200                 return ERR_PTR(-ENOMEM);
1201 
1202         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1203 
1204         usb_fill_int_urb(urb, data->udev, pipe,
1205                          skb->data, skb->len, btusb_isoc_tx_complete,
1206                          skb, data->isoc_tx_ep->bInterval);
1207 
1208         urb->transfer_flags  = URB_ISO_ASAP;
1209 
1210         __fill_isoc_descriptor(urb, skb->len,
1211                                le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1212 
1213         skb->dev = (void *)hdev;
1214 
1215         return urb;
1216 }
1217 
1218 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1219 {
1220         struct btusb_data *data = hci_get_drvdata(hdev);
1221         int err;
1222 
1223         usb_anchor_urb(urb, &data->tx_anchor);
1224 
1225         err = usb_submit_urb(urb, GFP_KERNEL);
1226         if (err < 0) {
1227                 if (err != -EPERM && err != -ENODEV)
1228                         BT_ERR("%s urb %p submission failed (%d)",
1229                                hdev->name, urb, -err);
1230                 kfree(urb->setup_packet);
1231                 usb_unanchor_urb(urb);
1232         } else {
1233                 usb_mark_last_busy(data->udev);
1234         }
1235 
1236         usb_free_urb(urb);
1237         return err;
1238 }
1239 
1240 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1241 {
1242         struct btusb_data *data = hci_get_drvdata(hdev);
1243         unsigned long flags;
1244         bool suspending;
1245 
1246         spin_lock_irqsave(&data->txlock, flags);
1247         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1248         if (!suspending)
1249                 data->tx_in_flight++;
1250         spin_unlock_irqrestore(&data->txlock, flags);
1251 
1252         if (!suspending)
1253                 return submit_tx_urb(hdev, urb);
1254 
1255         usb_anchor_urb(urb, &data->deferred);
1256         schedule_work(&data->waker);
1257 
1258         usb_free_urb(urb);
1259         return 0;
1260 }
1261 
1262 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1263 {
1264         struct urb *urb;
1265 
1266         BT_DBG("%s", hdev->name);
1267 
1268         switch (hci_skb_pkt_type(skb)) {
1269         case HCI_COMMAND_PKT:
1270                 urb = alloc_ctrl_urb(hdev, skb);
1271                 if (IS_ERR(urb))
1272                         return PTR_ERR(urb);
1273 
1274                 hdev->stat.cmd_tx++;
1275                 return submit_or_queue_tx_urb(hdev, urb);
1276 
1277         case HCI_ACLDATA_PKT:
1278                 urb = alloc_bulk_urb(hdev, skb);
1279                 if (IS_ERR(urb))
1280                         return PTR_ERR(urb);
1281 
1282                 hdev->stat.acl_tx++;
1283                 return submit_or_queue_tx_urb(hdev, urb);
1284 
1285         case HCI_SCODATA_PKT:
1286                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1287                         return -ENODEV;
1288 
1289                 urb = alloc_isoc_urb(hdev, skb);
1290                 if (IS_ERR(urb))
1291                         return PTR_ERR(urb);
1292 
1293                 hdev->stat.sco_tx++;
1294                 return submit_tx_urb(hdev, urb);
1295         }
1296 
1297         return -EILSEQ;
1298 }
1299 
1300 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1301 {
1302         struct btusb_data *data = hci_get_drvdata(hdev);
1303 
1304         BT_DBG("%s evt %d", hdev->name, evt);
1305 
1306         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1307                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1308                 schedule_work(&data->work);
1309         }
1310 }
1311 
1312 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1313 {
1314         struct btusb_data *data = hci_get_drvdata(hdev);
1315         struct usb_interface *intf = data->isoc;
1316         struct usb_endpoint_descriptor *ep_desc;
1317         int i, err;
1318 
1319         if (!data->isoc)
1320                 return -ENODEV;
1321 
1322         err = usb_set_interface(data->udev, 1, altsetting);
1323         if (err < 0) {
1324                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
1325                 return err;
1326         }
1327 
1328         data->isoc_altsetting = altsetting;
1329 
1330         data->isoc_tx_ep = NULL;
1331         data->isoc_rx_ep = NULL;
1332 
1333         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1334                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1335 
1336                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1337                         data->isoc_tx_ep = ep_desc;
1338                         continue;
1339                 }
1340 
1341                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1342                         data->isoc_rx_ep = ep_desc;
1343                         continue;
1344                 }
1345         }
1346 
1347         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1348                 BT_ERR("%s invalid SCO descriptors", hdev->name);
1349                 return -ENODEV;
1350         }
1351 
1352         return 0;
1353 }
1354 
1355 static void btusb_work(struct work_struct *work)
1356 {
1357         struct btusb_data *data = container_of(work, struct btusb_data, work);
1358         struct hci_dev *hdev = data->hdev;
1359         int new_alts;
1360         int err;
1361 
1362         if (data->sco_num > 0) {
1363                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1364                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1365                         if (err < 0) {
1366                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1367                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1368                                 return;
1369                         }
1370 
1371                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1372                 }
1373 
1374                 if (hdev->voice_setting & 0x0020) {
1375                         static const int alts[3] = { 2, 4, 5 };
1376 
1377                         new_alts = alts[data->sco_num - 1];
1378                 } else {
1379                         new_alts = data->sco_num;
1380                 }
1381 
1382                 if (data->isoc_altsetting != new_alts) {
1383                         unsigned long flags;
1384 
1385                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1386                         usb_kill_anchored_urbs(&data->isoc_anchor);
1387 
1388                         /* When isochronous alternate setting needs to be
1389                          * changed, because SCO connection has been added
1390                          * or removed, a packet fragment may be left in the
1391                          * reassembling state. This could lead to wrongly
1392                          * assembled fragments.
1393                          *
1394                          * Clear outstanding fragment when selecting a new
1395                          * alternate setting.
1396                          */
1397                         spin_lock_irqsave(&data->rxlock, flags);
1398                         kfree_skb(data->sco_skb);
1399                         data->sco_skb = NULL;
1400                         spin_unlock_irqrestore(&data->rxlock, flags);
1401 
1402                         if (__set_isoc_interface(hdev, new_alts) < 0)
1403                                 return;
1404                 }
1405 
1406                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1407                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1408                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1409                         else
1410                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1411                 }
1412         } else {
1413                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1414                 usb_kill_anchored_urbs(&data->isoc_anchor);
1415 
1416                 __set_isoc_interface(hdev, 0);
1417                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1418                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1419         }
1420 }
1421 
1422 static void btusb_waker(struct work_struct *work)
1423 {
1424         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1425         int err;
1426 
1427         err = usb_autopm_get_interface(data->intf);
1428         if (err < 0)
1429                 return;
1430 
1431         usb_autopm_put_interface(data->intf);
1432 }
1433 
1434 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1435 {
1436         struct sk_buff *skb;
1437         u8 val = 0x00;
1438 
1439         BT_DBG("%s", hdev->name);
1440 
1441         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1442         if (IS_ERR(skb))
1443                 BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
1444         else
1445                 kfree_skb(skb);
1446 
1447         return 0;
1448 }
1449 
1450 static int btusb_setup_csr(struct hci_dev *hdev)
1451 {
1452         struct hci_rp_read_local_version *rp;
1453         struct sk_buff *skb;
1454 
1455         BT_DBG("%s", hdev->name);
1456 
1457         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1458                              HCI_INIT_TIMEOUT);
1459         if (IS_ERR(skb)) {
1460                 int err = PTR_ERR(skb);
1461                 BT_ERR("%s: CSR: Local version failed (%d)", hdev->name, err);
1462                 return err;
1463         }
1464 
1465         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
1466                 BT_ERR("%s: CSR: Local version length mismatch", hdev->name);
1467                 kfree_skb(skb);
1468                 return -EIO;
1469         }
1470 
1471         rp = (struct hci_rp_read_local_version *)skb->data;
1472 
1473         /* Detect controllers which aren't real CSR ones. */
1474         if (le16_to_cpu(rp->manufacturer) != 10 ||
1475             le16_to_cpu(rp->lmp_subver) == 0x0c5c) {
1476                 /* Clear the reset quirk since this is not an actual
1477                  * early Bluetooth 1.1 device from CSR.
1478                  */
1479                 clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1480 
1481                 /* These fake CSR controllers have all a broken
1482                  * stored link key handling and so just disable it.
1483                  */
1484                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
1485         }
1486 
1487         kfree_skb(skb);
1488 
1489         return 0;
1490 }
1491 
1492 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1493                                                        struct intel_version *ver)
1494 {
1495         const struct firmware *fw;
1496         char fwname[64];
1497         int ret;
1498 
1499         snprintf(fwname, sizeof(fwname),
1500                  "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1501                  ver->hw_platform, ver->hw_variant, ver->hw_revision,
1502                  ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1503                  ver->fw_build_ww, ver->fw_build_yy);
1504 
1505         ret = request_firmware(&fw, fwname, &hdev->dev);
1506         if (ret < 0) {
1507                 if (ret == -EINVAL) {
1508                         BT_ERR("%s Intel firmware file request failed (%d)",
1509                                hdev->name, ret);
1510                         return NULL;
1511                 }
1512 
1513                 BT_ERR("%s failed to open Intel firmware file: %s(%d)",
1514                        hdev->name, fwname, ret);
1515 
1516                 /* If the correct firmware patch file is not found, use the
1517                  * default firmware patch file instead
1518                  */
1519                 snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1520                          ver->hw_platform, ver->hw_variant);
1521                 if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1522                         BT_ERR("%s failed to open default Intel fw file: %s",
1523                                hdev->name, fwname);
1524                         return NULL;
1525                 }
1526         }
1527 
1528         BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
1529 
1530         return fw;
1531 }
1532 
1533 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1534                                       const struct firmware *fw,
1535                                       const u8 **fw_ptr, int *disable_patch)
1536 {
1537         struct sk_buff *skb;
1538         struct hci_command_hdr *cmd;
1539         const u8 *cmd_param;
1540         struct hci_event_hdr *evt = NULL;
1541         const u8 *evt_param = NULL;
1542         int remain = fw->size - (*fw_ptr - fw->data);
1543 
1544         /* The first byte indicates the types of the patch command or event.
1545          * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1546          * in the current firmware buffer doesn't start with 0x01 or
1547          * the size of remain buffer is smaller than HCI command header,
1548          * the firmware file is corrupted and it should stop the patching
1549          * process.
1550          */
1551         if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1552                 BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
1553                 return -EINVAL;
1554         }
1555         (*fw_ptr)++;
1556         remain--;
1557 
1558         cmd = (struct hci_command_hdr *)(*fw_ptr);
1559         *fw_ptr += sizeof(*cmd);
1560         remain -= sizeof(*cmd);
1561 
1562         /* Ensure that the remain firmware data is long enough than the length
1563          * of command parameter. If not, the firmware file is corrupted.
1564          */
1565         if (remain < cmd->plen) {
1566                 BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
1567                 return -EFAULT;
1568         }
1569 
1570         /* If there is a command that loads a patch in the firmware
1571          * file, then enable the patch upon success, otherwise just
1572          * disable the manufacturer mode, for example patch activation
1573          * is not required when the default firmware patch file is used
1574          * because there are no patch data to load.
1575          */
1576         if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1577                 *disable_patch = 0;
1578 
1579         cmd_param = *fw_ptr;
1580         *fw_ptr += cmd->plen;
1581         remain -= cmd->plen;
1582 
1583         /* This reads the expected events when the above command is sent to the
1584          * device. Some vendor commands expects more than one events, for
1585          * example command status event followed by vendor specific event.
1586          * For this case, it only keeps the last expected event. so the command
1587          * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1588          * last expected event.
1589          */
1590         while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1591                 (*fw_ptr)++;
1592                 remain--;
1593 
1594                 evt = (struct hci_event_hdr *)(*fw_ptr);
1595                 *fw_ptr += sizeof(*evt);
1596                 remain -= sizeof(*evt);
1597 
1598                 if (remain < evt->plen) {
1599                         BT_ERR("%s Intel fw corrupted: invalid evt len",
1600                                hdev->name);
1601                         return -EFAULT;
1602                 }
1603 
1604                 evt_param = *fw_ptr;
1605                 *fw_ptr += evt->plen;
1606                 remain -= evt->plen;
1607         }
1608 
1609         /* Every HCI commands in the firmware file has its correspond event.
1610          * If event is not found or remain is smaller than zero, the firmware
1611          * file is corrupted.
1612          */
1613         if (!evt || !evt_param || remain < 0) {
1614                 BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
1615                 return -EFAULT;
1616         }
1617 
1618         skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1619                                 cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1620         if (IS_ERR(skb)) {
1621                 BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
1622                        hdev->name, cmd->opcode, PTR_ERR(skb));
1623                 return PTR_ERR(skb);
1624         }
1625 
1626         /* It ensures that the returned event matches the event data read from
1627          * the firmware file. At fist, it checks the length and then
1628          * the contents of the event.
1629          */
1630         if (skb->len != evt->plen) {
1631                 BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
1632                        le16_to_cpu(cmd->opcode));
1633                 kfree_skb(skb);
1634                 return -EFAULT;
1635         }
1636 
1637         if (memcmp(skb->data, evt_param, evt->plen)) {
1638                 BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
1639                        hdev->name, le16_to_cpu(cmd->opcode));
1640                 kfree_skb(skb);
1641                 return -EFAULT;
1642         }
1643         kfree_skb(skb);
1644 
1645         return 0;
1646 }
1647 
1648 static int btusb_setup_intel(struct hci_dev *hdev)
1649 {
1650         struct sk_buff *skb;
1651         const struct firmware *fw;
1652         const u8 *fw_ptr;
1653         int disable_patch, err;
1654         struct intel_version ver;
1655 
1656         BT_DBG("%s", hdev->name);
1657 
1658         /* The controller has a bug with the first HCI command sent to it
1659          * returning number of completed commands as zero. This would stall the
1660          * command processing in the Bluetooth core.
1661          *
1662          * As a workaround, send HCI Reset command first which will reset the
1663          * number of completed commands and allow normal command processing
1664          * from now on.
1665          */
1666         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1667         if (IS_ERR(skb)) {
1668                 BT_ERR("%s sending initial HCI reset command failed (%ld)",
1669                        hdev->name, PTR_ERR(skb));
1670                 return PTR_ERR(skb);
1671         }
1672         kfree_skb(skb);
1673 
1674         /* Read Intel specific controller version first to allow selection of
1675          * which firmware file to load.
1676          *
1677          * The returned information are hardware variant and revision plus
1678          * firmware variant, revision and build number.
1679          */
1680         err = btintel_read_version(hdev, &ver);
1681         if (err)
1682                 return err;
1683 
1684         BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
1685                 hdev->name, ver.hw_platform, ver.hw_variant, ver.hw_revision,
1686                 ver.fw_variant,  ver.fw_revision, ver.fw_build_num,
1687                 ver.fw_build_ww, ver.fw_build_yy, ver.fw_patch_num);
1688 
1689         /* fw_patch_num indicates the version of patch the device currently
1690          * have. If there is no patch data in the device, it is always 0x00.
1691          * So, if it is other than 0x00, no need to patch the device again.
1692          */
1693         if (ver.fw_patch_num) {
1694                 BT_INFO("%s: Intel device is already patched. patch num: %02x",
1695                         hdev->name, ver.fw_patch_num);
1696                 goto complete;
1697         }
1698 
1699         /* Opens the firmware patch file based on the firmware version read
1700          * from the controller. If it fails to open the matching firmware
1701          * patch file, it tries to open the default firmware patch file.
1702          * If no patch file is found, allow the device to operate without
1703          * a patch.
1704          */
1705         fw = btusb_setup_intel_get_fw(hdev, &ver);
1706         if (!fw)
1707                 goto complete;
1708         fw_ptr = fw->data;
1709 
1710         /* Enable the manufacturer mode of the controller.
1711          * Only while this mode is enabled, the driver can download the
1712          * firmware patch data and configuration parameters.
1713          */
1714         err = btintel_enter_mfg(hdev);
1715         if (err) {
1716                 release_firmware(fw);
1717                 return err;
1718         }
1719 
1720         disable_patch = 1;
1721 
1722         /* The firmware data file consists of list of Intel specific HCI
1723          * commands and its expected events. The first byte indicates the
1724          * type of the message, either HCI command or HCI event.
1725          *
1726          * It reads the command and its expected event from the firmware file,
1727          * and send to the controller. Once __hci_cmd_sync_ev() returns,
1728          * the returned event is compared with the event read from the firmware
1729          * file and it will continue until all the messages are downloaded to
1730          * the controller.
1731          *
1732          * Once the firmware patching is completed successfully,
1733          * the manufacturer mode is disabled with reset and activating the
1734          * downloaded patch.
1735          *
1736          * If the firmware patching fails, the manufacturer mode is
1737          * disabled with reset and deactivating the patch.
1738          *
1739          * If the default patch file is used, no reset is done when disabling
1740          * the manufacturer.
1741          */
1742         while (fw->size > fw_ptr - fw->data) {
1743                 int ret;
1744 
1745                 ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
1746                                                  &disable_patch);
1747                 if (ret < 0)
1748                         goto exit_mfg_deactivate;
1749         }
1750 
1751         release_firmware(fw);
1752 
1753         if (disable_patch)
1754                 goto exit_mfg_disable;
1755 
1756         /* Patching completed successfully and disable the manufacturer mode
1757          * with reset and activate the downloaded firmware patches.
1758          */
1759         err = btintel_exit_mfg(hdev, true, true);
1760         if (err)
1761                 return err;
1762 
1763         BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
1764                 hdev->name);
1765 
1766         goto complete;
1767 
1768 exit_mfg_disable:
1769         /* Disable the manufacturer mode without reset */
1770         err = btintel_exit_mfg(hdev, false, false);
1771         if (err)
1772                 return err;
1773 
1774         BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
1775 
1776         goto complete;
1777 
1778 exit_mfg_deactivate:
1779         release_firmware(fw);
1780 
1781         /* Patching failed. Disable the manufacturer mode with reset and
1782          * deactivate the downloaded firmware patches.
1783          */
1784         err = btintel_exit_mfg(hdev, true, false);
1785         if (err)
1786                 return err;
1787 
1788         BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
1789                 hdev->name);
1790 
1791 complete:
1792         /* Set the event mask for Intel specific vendor events. This enables
1793          * a few extra events that are useful during general operation.
1794          */
1795         btintel_set_event_mask_mfg(hdev, false);
1796 
1797         btintel_check_bdaddr(hdev);
1798         return 0;
1799 }
1800 
1801 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
1802 {
1803         struct sk_buff *skb;
1804         struct hci_event_hdr *hdr;
1805         struct hci_ev_cmd_complete *evt;
1806 
1807         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
1808         if (!skb)
1809                 return -ENOMEM;
1810 
1811         hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
1812         hdr->evt = HCI_EV_CMD_COMPLETE;
1813         hdr->plen = sizeof(*evt) + 1;
1814 
1815         evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
1816         evt->ncmd = 0x01;
1817         evt->opcode = cpu_to_le16(opcode);
1818 
1819         *skb_put(skb, 1) = 0x00;
1820 
1821         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
1822 
1823         return hci_recv_frame(hdev, skb);
1824 }
1825 
1826 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
1827                                  int count)
1828 {
1829         /* When the device is in bootloader mode, then it can send
1830          * events via the bulk endpoint. These events are treated the
1831          * same way as the ones received from the interrupt endpoint.
1832          */
1833         if (test_bit(BTUSB_BOOTLOADER, &data->flags))
1834                 return btusb_recv_intr(data, buffer, count);
1835 
1836         return btusb_recv_bulk(data, buffer, count);
1837 }
1838 
1839 static void btusb_intel_bootup(struct btusb_data *data, const void *ptr,
1840                                unsigned int len)
1841 {
1842         const struct intel_bootup *evt = ptr;
1843 
1844         if (len != sizeof(*evt))
1845                 return;
1846 
1847         if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {
1848                 smp_mb__after_atomic();
1849                 wake_up_bit(&data->flags, BTUSB_BOOTING);
1850         }
1851 }
1852 
1853 static void btusb_intel_secure_send_result(struct btusb_data *data,
1854                                            const void *ptr, unsigned int len)
1855 {
1856         const struct intel_secure_send_result *evt = ptr;
1857 
1858         if (len != sizeof(*evt))
1859                 return;
1860 
1861         if (evt->result)
1862                 set_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
1863 
1864         if (test_and_clear_bit(BTUSB_DOWNLOADING, &data->flags) &&
1865             test_bit(BTUSB_FIRMWARE_LOADED, &data->flags)) {
1866                 smp_mb__after_atomic();
1867                 wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
1868         }
1869 }
1870 
1871 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
1872 {
1873         struct btusb_data *data = hci_get_drvdata(hdev);
1874 
1875         if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1876                 struct hci_event_hdr *hdr = (void *)skb->data;
1877 
1878                 if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
1879                     hdr->plen > 0) {
1880                         const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
1881                         unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
1882 
1883                         switch (skb->data[2]) {
1884                         case 0x02:
1885                                 /* When switching to the operational firmware
1886                                  * the device sends a vendor specific event
1887                                  * indicating that the bootup completed.
1888                                  */
1889                                 btusb_intel_bootup(data, ptr, len);
1890                                 break;
1891                         case 0x06:
1892                                 /* When the firmware loading completes the
1893                                  * device sends out a vendor specific event
1894                                  * indicating the result of the firmware
1895                                  * loading.
1896                                  */
1897                                 btusb_intel_secure_send_result(data, ptr, len);
1898                                 break;
1899                         }
1900                 }
1901         }
1902 
1903         return hci_recv_frame(hdev, skb);
1904 }
1905 
1906 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
1907 {
1908         struct btusb_data *data = hci_get_drvdata(hdev);
1909         struct urb *urb;
1910 
1911         BT_DBG("%s", hdev->name);
1912 
1913         switch (hci_skb_pkt_type(skb)) {
1914         case HCI_COMMAND_PKT:
1915                 if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1916                         struct hci_command_hdr *cmd = (void *)skb->data;
1917                         __u16 opcode = le16_to_cpu(cmd->opcode);
1918 
1919                         /* When in bootloader mode and the command 0xfc09
1920                          * is received, it needs to be send down the
1921                          * bulk endpoint. So allocate a bulk URB instead.
1922                          */
1923                         if (opcode == 0xfc09)
1924                                 urb = alloc_bulk_urb(hdev, skb);
1925                         else
1926                                 urb = alloc_ctrl_urb(hdev, skb);
1927 
1928                         /* When the 0xfc01 command is issued to boot into
1929                          * the operational firmware, it will actually not
1930                          * send a command complete event. To keep the flow
1931                          * control working inject that event here.
1932                          */
1933                         if (opcode == 0xfc01)
1934                                 inject_cmd_complete(hdev, opcode);
1935                 } else {
1936                         urb = alloc_ctrl_urb(hdev, skb);
1937                 }
1938                 if (IS_ERR(urb))
1939                         return PTR_ERR(urb);
1940 
1941                 hdev->stat.cmd_tx++;
1942                 return submit_or_queue_tx_urb(hdev, urb);
1943 
1944         case HCI_ACLDATA_PKT:
1945                 urb = alloc_bulk_urb(hdev, skb);
1946                 if (IS_ERR(urb))
1947                         return PTR_ERR(urb);
1948 
1949                 hdev->stat.acl_tx++;
1950                 return submit_or_queue_tx_urb(hdev, urb);
1951 
1952         case HCI_SCODATA_PKT:
1953                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1954                         return -ENODEV;
1955 
1956                 urb = alloc_isoc_urb(hdev, skb);
1957                 if (IS_ERR(urb))
1958                         return PTR_ERR(urb);
1959 
1960                 hdev->stat.sco_tx++;
1961                 return submit_tx_urb(hdev, urb);
1962         }
1963 
1964         return -EILSEQ;
1965 }
1966 
1967 static int btusb_setup_intel_new(struct hci_dev *hdev)
1968 {
1969         static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
1970                                           0x00, 0x08, 0x04, 0x00 };
1971         struct btusb_data *data = hci_get_drvdata(hdev);
1972         struct sk_buff *skb;
1973         struct intel_version ver;
1974         struct intel_boot_params *params;
1975         const struct firmware *fw;
1976         const u8 *fw_ptr;
1977         u32 frag_len;
1978         char fwname[64];
1979         ktime_t calltime, delta, rettime;
1980         unsigned long long duration;
1981         int err;
1982 
1983         BT_DBG("%s", hdev->name);
1984 
1985         calltime = ktime_get();
1986 
1987         /* Read the Intel version information to determine if the device
1988          * is in bootloader mode or if it already has operational firmware
1989          * loaded.
1990          */
1991         err = btintel_read_version(hdev, &ver);
1992         if (err)
1993                 return err;
1994 
1995         /* The hardware platform number has a fixed value of 0x37 and
1996          * for now only accept this single value.
1997          */
1998         if (ver.hw_platform != 0x37) {
1999                 BT_ERR("%s: Unsupported Intel hardware platform (%u)",
2000                        hdev->name, ver.hw_platform);
2001                 return -EINVAL;
2002         }
2003 
2004         /* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is
2005          * supported by this firmware loading method. This check has been
2006          * put in place to ensure correct forward compatibility options
2007          * when newer hardware variants come along.
2008          */
2009         if (ver.hw_variant != 0x0b) {
2010                 BT_ERR("%s: Unsupported Intel hardware variant (%u)",
2011                        hdev->name, ver.hw_variant);
2012                 return -EINVAL;
2013         }
2014 
2015         btintel_version_info(hdev, &ver);
2016 
2017         /* The firmware variant determines if the device is in bootloader
2018          * mode or is running operational firmware. The value 0x06 identifies
2019          * the bootloader and the value 0x23 identifies the operational
2020          * firmware.
2021          *
2022          * When the operational firmware is already present, then only
2023          * the check for valid Bluetooth device address is needed. This
2024          * determines if the device will be added as configured or
2025          * unconfigured controller.
2026          *
2027          * It is not possible to use the Secure Boot Parameters in this
2028          * case since that command is only available in bootloader mode.
2029          */
2030         if (ver.fw_variant == 0x23) {
2031                 clear_bit(BTUSB_BOOTLOADER, &data->flags);
2032                 btintel_check_bdaddr(hdev);
2033                 return 0;
2034         }
2035 
2036         /* If the device is not in bootloader mode, then the only possible
2037          * choice is to return an error and abort the device initialization.
2038          */
2039         if (ver.fw_variant != 0x06) {
2040                 BT_ERR("%s: Unsupported Intel firmware variant (%u)",
2041                        hdev->name, ver.fw_variant);
2042                 return -ENODEV;
2043         }
2044 
2045         /* Read the secure boot parameters to identify the operating
2046          * details of the bootloader.
2047          */
2048         skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
2049         if (IS_ERR(skb)) {
2050                 BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
2051                        hdev->name, PTR_ERR(skb));
2052                 return PTR_ERR(skb);
2053         }
2054 
2055         if (skb->len != sizeof(*params)) {
2056                 BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
2057                 kfree_skb(skb);
2058                 return -EILSEQ;
2059         }
2060 
2061         params = (struct intel_boot_params *)skb->data;
2062 
2063         BT_INFO("%s: Device revision is %u", hdev->name,
2064                 le16_to_cpu(params->dev_revid));
2065 
2066         BT_INFO("%s: Secure boot is %s", hdev->name,
2067                 params->secure_boot ? "enabled" : "disabled");
2068 
2069         BT_INFO("%s: OTP lock is %s", hdev->name,
2070                 params->otp_lock ? "enabled" : "disabled");
2071 
2072         BT_INFO("%s: API lock is %s", hdev->name,
2073                 params->api_lock ? "enabled" : "disabled");
2074 
2075         BT_INFO("%s: Debug lock is %s", hdev->name,
2076                 params->debug_lock ? "enabled" : "disabled");
2077 
2078         BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
2079                 params->min_fw_build_nn, params->min_fw_build_cw,
2080                 2000 + params->min_fw_build_yy);
2081 
2082         /* It is required that every single firmware fragment is acknowledged
2083          * with a command complete event. If the boot parameters indicate
2084          * that this bootloader does not send them, then abort the setup.
2085          */
2086         if (params->limited_cce != 0x00) {
2087                 BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
2088                        hdev->name, params->limited_cce);
2089                 kfree_skb(skb);
2090                 return -EINVAL;
2091         }
2092 
2093         /* If the OTP has no valid Bluetooth device address, then there will
2094          * also be no valid address for the operational firmware.
2095          */
2096         if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
2097                 BT_INFO("%s: No device address configured", hdev->name);
2098                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2099         }
2100 
2101         /* With this Intel bootloader only the hardware variant and device
2102          * revision information are used to select the right firmware.
2103          *
2104          * Currently this bootloader support is limited to hardware variant
2105          * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
2106          */
2107         snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
2108                  le16_to_cpu(params->dev_revid));
2109 
2110         err = request_firmware(&fw, fwname, &hdev->dev);
2111         if (err < 0) {
2112                 BT_ERR("%s: Failed to load Intel firmware file (%d)",
2113                        hdev->name, err);
2114                 kfree_skb(skb);
2115                 return err;
2116         }
2117 
2118         BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);
2119 
2120         /* Save the DDC file name for later use to apply once the firmware
2121          * downloading is done.
2122          */
2123         snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
2124                  le16_to_cpu(params->dev_revid));
2125 
2126         kfree_skb(skb);
2127 
2128         if (fw->size < 644) {
2129                 BT_ERR("%s: Invalid size of firmware file (%zu)",
2130                        hdev->name, fw->size);
2131                 err = -EBADF;
2132                 goto done;
2133         }
2134 
2135         set_bit(BTUSB_DOWNLOADING, &data->flags);
2136 
2137         /* Start the firmware download transaction with the Init fragment
2138          * represented by the 128 bytes of CSS header.
2139          */
2140         err = btintel_secure_send(hdev, 0x00, 128, fw->data);
2141         if (err < 0) {
2142                 BT_ERR("%s: Failed to send firmware header (%d)",
2143                        hdev->name, err);
2144                 goto done;
2145         }
2146 
2147         /* Send the 256 bytes of public key information from the firmware
2148          * as the PKey fragment.
2149          */
2150         err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
2151         if (err < 0) {
2152                 BT_ERR("%s: Failed to send firmware public key (%d)",
2153                        hdev->name, err);
2154                 goto done;
2155         }
2156 
2157         /* Send the 256 bytes of signature information from the firmware
2158          * as the Sign fragment.
2159          */
2160         err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
2161         if (err < 0) {
2162                 BT_ERR("%s: Failed to send firmware signature (%d)",
2163                        hdev->name, err);
2164                 goto done;
2165         }
2166 
2167         fw_ptr = fw->data + 644;
2168         frag_len = 0;
2169 
2170         while (fw_ptr - fw->data < fw->size) {
2171                 struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
2172 
2173                 frag_len += sizeof(*cmd) + cmd->plen;
2174 
2175                 /* The parameter length of the secure send command requires
2176                  * a 4 byte alignment. It happens so that the firmware file
2177                  * contains proper Intel_NOP commands to align the fragments
2178                  * as needed.
2179                  *
2180                  * Send set of commands with 4 byte alignment from the
2181                  * firmware data buffer as a single Data fragement.
2182                  */
2183                 if (!(frag_len % 4)) {
2184                         err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
2185                         if (err < 0) {
2186                                 BT_ERR("%s: Failed to send firmware data (%d)",
2187                                        hdev->name, err);
2188                                 goto done;
2189                         }
2190 
2191                         fw_ptr += frag_len;
2192                         frag_len = 0;
2193                 }
2194         }
2195 
2196         set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
2197 
2198         BT_INFO("%s: Waiting for firmware download to complete", hdev->name);
2199 
2200         /* Before switching the device into operational mode and with that
2201          * booting the loaded firmware, wait for the bootloader notification
2202          * that all fragments have been successfully received.
2203          *
2204          * When the event processing receives the notification, then the
2205          * BTUSB_DOWNLOADING flag will be cleared.
2206          *
2207          * The firmware loading should not take longer than 5 seconds
2208          * and thus just timeout if that happens and fail the setup
2209          * of this device.
2210          */
2211         err = wait_on_bit_timeout(&data->flags, BTUSB_DOWNLOADING,
2212                                   TASK_INTERRUPTIBLE,
2213                                   msecs_to_jiffies(5000));
2214         if (err == 1) {
2215                 BT_ERR("%s: Firmware loading interrupted", hdev->name);
2216                 err = -EINTR;
2217                 goto done;
2218         }
2219 
2220         if (err) {
2221                 BT_ERR("%s: Firmware loading timeout", hdev->name);
2222                 err = -ETIMEDOUT;
2223                 goto done;
2224         }
2225 
2226         if (test_bit(BTUSB_FIRMWARE_FAILED, &data->flags)) {
2227                 BT_ERR("%s: Firmware loading failed", hdev->name);
2228                 err = -ENOEXEC;
2229                 goto done;
2230         }
2231 
2232         rettime = ktime_get();
2233         delta = ktime_sub(rettime, calltime);
2234         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2235 
2236         BT_INFO("%s: Firmware loaded in %llu usecs", hdev->name, duration);
2237 
2238 done:
2239         release_firmware(fw);
2240 
2241         if (err < 0)
2242                 return err;
2243 
2244         calltime = ktime_get();
2245 
2246         set_bit(BTUSB_BOOTING, &data->flags);
2247 
2248         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param,
2249                              HCI_INIT_TIMEOUT);
2250         if (IS_ERR(skb))
2251                 return PTR_ERR(skb);
2252 
2253         kfree_skb(skb);
2254 
2255         /* The bootloader will not indicate when the device is ready. This
2256          * is done by the operational firmware sending bootup notification.
2257          *
2258          * Booting into operational firmware should not take longer than
2259          * 1 second. However if that happens, then just fail the setup
2260          * since something went wrong.
2261          */
2262         BT_INFO("%s: Waiting for device to boot", hdev->name);
2263 
2264         err = wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2265                                   TASK_INTERRUPTIBLE,
2266                                   msecs_to_jiffies(1000));
2267 
2268         if (err == 1) {
2269                 BT_ERR("%s: Device boot interrupted", hdev->name);
2270                 return -EINTR;
2271         }
2272 
2273         if (err) {
2274                 BT_ERR("%s: Device boot timeout", hdev->name);
2275                 return -ETIMEDOUT;
2276         }
2277 
2278         rettime = ktime_get();
2279         delta = ktime_sub(rettime, calltime);
2280         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2281 
2282         BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration);
2283 
2284         clear_bit(BTUSB_BOOTLOADER, &data->flags);
2285 
2286         /* Once the device is running in operational mode, it needs to apply
2287          * the device configuration (DDC) parameters.
2288          *
2289          * The device can work without DDC parameters, so even if it fails
2290          * to load the file, no need to fail the setup.
2291          */
2292         btintel_load_ddc_config(hdev, fwname);
2293 
2294         /* Set the event mask for Intel specific vendor events. This enables
2295          * a few extra events that are useful during general operation. It
2296          * does not enable any debugging related events.
2297          *
2298          * The device will function correctly without these events enabled
2299          * and thus no need to fail the setup.
2300          */
2301         btintel_set_event_mask(hdev, false);
2302 
2303         return 0;
2304 }
2305 
2306 static int btusb_shutdown_intel(struct hci_dev *hdev)
2307 {
2308         struct sk_buff *skb;
2309         long ret;
2310 
2311         /* Some platforms have an issue with BT LED when the interface is
2312          * down or BT radio is turned off, which takes 5 seconds to BT LED
2313          * goes off. This command turns off the BT LED immediately.
2314          */
2315         skb = __hci_cmd_sync(hdev, 0xfc3f, 0, NULL, HCI_INIT_TIMEOUT);
2316         if (IS_ERR(skb)) {
2317                 ret = PTR_ERR(skb);
2318                 BT_ERR("%s: turning off Intel device LED failed (%ld)",
2319                        hdev->name, ret);
2320                 return ret;
2321         }
2322         kfree_skb(skb);
2323 
2324         return 0;
2325 }
2326 
2327 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2328                                     const bdaddr_t *bdaddr)
2329 {
2330         struct sk_buff *skb;
2331         u8 buf[8];
2332         long ret;
2333 
2334         buf[0] = 0xfe;
2335         buf[1] = sizeof(bdaddr_t);
2336         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2337 
2338         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2339         if (IS_ERR(skb)) {
2340                 ret = PTR_ERR(skb);
2341                 BT_ERR("%s: changing Marvell device address failed (%ld)",
2342                        hdev->name, ret);
2343                 return ret;
2344         }
2345         kfree_skb(skb);
2346 
2347         return 0;
2348 }
2349 
2350 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
2351                                     const bdaddr_t *bdaddr)
2352 {
2353         struct sk_buff *skb;
2354         u8 buf[10];
2355         long ret;
2356 
2357         buf[0] = 0x01;
2358         buf[1] = 0x01;
2359         buf[2] = 0x00;
2360         buf[3] = sizeof(bdaddr_t);
2361         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
2362 
2363         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2364         if (IS_ERR(skb)) {
2365                 ret = PTR_ERR(skb);
2366                 BT_ERR("%s: Change address command failed (%ld)",
2367                        hdev->name, ret);
2368                 return ret;
2369         }
2370         kfree_skb(skb);
2371 
2372         return 0;
2373 }
2374 
2375 #define QCA_DFU_PACKET_LEN      4096
2376 
2377 #define QCA_GET_TARGET_VERSION  0x09
2378 #define QCA_CHECK_STATUS        0x05
2379 #define QCA_DFU_DOWNLOAD        0x01
2380 
2381 #define QCA_SYSCFG_UPDATED      0x40
2382 #define QCA_PATCH_UPDATED       0x80
2383 #define QCA_DFU_TIMEOUT         3000
2384 
2385 struct qca_version {
2386         __le32  rom_version;
2387         __le32  patch_version;
2388         __le32  ram_version;
2389         __le32  ref_clock;
2390         __u8    reserved[4];
2391 } __packed;
2392 
2393 struct qca_rampatch_version {
2394         __le16  rom_version;
2395         __le16  patch_version;
2396 } __packed;
2397 
2398 struct qca_device_info {
2399         u32     rom_version;
2400         u8      rampatch_hdr;   /* length of header in rampatch */
2401         u8      nvm_hdr;        /* length of header in NVM */
2402         u8      ver_offset;     /* offset of version structure in rampatch */
2403 };
2404 
2405 static const struct qca_device_info qca_devices_table[] = {
2406         { 0x00000100, 20, 4, 10 }, /* Rome 1.0 */
2407         { 0x00000101, 20, 4, 10 }, /* Rome 1.1 */
2408         { 0x00000200, 28, 4, 18 }, /* Rome 2.0 */
2409         { 0x00000201, 28, 4, 18 }, /* Rome 2.1 */
2410         { 0x00000300, 28, 4, 18 }, /* Rome 3.0 */
2411         { 0x00000302, 28, 4, 18 }, /* Rome 3.2 */
2412 };
2413 
2414 static int btusb_qca_send_vendor_req(struct hci_dev *hdev, u8 request,
2415                                      void *data, u16 size)
2416 {
2417         struct btusb_data *btdata = hci_get_drvdata(hdev);
2418         struct usb_device *udev = btdata->udev;
2419         int pipe, err;
2420         u8 *buf;
2421 
2422         buf = kmalloc(size, GFP_KERNEL);
2423         if (!buf)
2424                 return -ENOMEM;
2425 
2426         /* Found some of USB hosts have IOT issues with ours so that we should
2427          * not wait until HCI layer is ready.
2428          */
2429         pipe = usb_rcvctrlpipe(udev, 0);
2430         err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
2431                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2432         if (err < 0) {
2433                 BT_ERR("%s: Failed to access otp area (%d)", hdev->name, err);
2434                 goto done;
2435         }
2436 
2437         memcpy(data, buf, size);
2438 
2439 done:
2440         kfree(buf);
2441 
2442         return err;
2443 }
2444 
2445 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
2446                                        const struct firmware *firmware,
2447                                        size_t hdr_size)
2448 {
2449         struct btusb_data *btdata = hci_get_drvdata(hdev);
2450         struct usb_device *udev = btdata->udev;
2451         size_t count, size, sent = 0;
2452         int pipe, len, err;
2453         u8 *buf;
2454 
2455         buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
2456         if (!buf)
2457                 return -ENOMEM;
2458 
2459         count = firmware->size;
2460 
2461         size = min_t(size_t, count, hdr_size);
2462         memcpy(buf, firmware->data, size);
2463 
2464         /* USB patches should go down to controller through USB path
2465          * because binary format fits to go down through USB channel.
2466          * USB control path is for patching headers and USB bulk is for
2467          * patch body.
2468          */
2469         pipe = usb_sndctrlpipe(udev, 0);
2470         err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
2471                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2472         if (err < 0) {
2473                 BT_ERR("%s: Failed to send headers (%d)", hdev->name, err);
2474                 goto done;
2475         }
2476 
2477         sent += size;
2478         count -= size;
2479 
2480         while (count) {
2481                 size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
2482 
2483                 memcpy(buf, firmware->data + sent, size);
2484 
2485                 pipe = usb_sndbulkpipe(udev, 0x02);
2486                 err = usb_bulk_msg(udev, pipe, buf, size, &len,
2487                                    QCA_DFU_TIMEOUT);
2488                 if (err < 0) {
2489                         BT_ERR("%s: Failed to send body at %zd of %zd (%d)",
2490                                hdev->name, sent, firmware->size, err);
2491                         break;
2492                 }
2493 
2494                 if (size != len) {
2495                         BT_ERR("%s: Failed to get bulk buffer", hdev->name);
2496                         err = -EILSEQ;
2497                         break;
2498                 }
2499 
2500                 sent  += size;
2501                 count -= size;
2502         }
2503 
2504 done:
2505         kfree(buf);
2506         return err;
2507 }
2508 
2509 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
2510                                          struct qca_version *ver,
2511                                          const struct qca_device_info *info)
2512 {
2513         struct qca_rampatch_version *rver;
2514         const struct firmware *fw;
2515         u32 ver_rom, ver_patch;
2516         u16 rver_rom, rver_patch;
2517         char fwname[64];
2518         int err;
2519 
2520         ver_rom = le32_to_cpu(ver->rom_version);
2521         ver_patch = le32_to_cpu(ver->patch_version);
2522 
2523         snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
2524 
2525         err = request_firmware(&fw, fwname, &hdev->dev);
2526         if (err) {
2527                 BT_ERR("%s: failed to request rampatch file: %s (%d)",
2528                        hdev->name, fwname, err);
2529                 return err;
2530         }
2531 
2532         BT_INFO("%s: using rampatch file: %s", hdev->name, fwname);
2533 
2534         rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
2535         rver_rom = le16_to_cpu(rver->rom_version);
2536         rver_patch = le16_to_cpu(rver->patch_version);
2537 
2538         BT_INFO("%s: QCA: patch rome 0x%x build 0x%x, firmware rome 0x%x "
2539                 "build 0x%x", hdev->name, rver_rom, rver_patch, ver_rom,
2540                 ver_patch);
2541 
2542         if (rver_rom != ver_rom || rver_patch <= ver_patch) {
2543                 BT_ERR("%s: rampatch file version did not match with firmware",
2544                        hdev->name);
2545                 err = -EINVAL;
2546                 goto done;
2547         }
2548 
2549         err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
2550 
2551 done:
2552         release_firmware(fw);
2553 
2554         return err;
2555 }
2556 
2557 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
2558                                     struct qca_version *ver,
2559                                     const struct qca_device_info *info)
2560 {
2561         const struct firmware *fw;
2562         char fwname[64];
2563         int err;
2564 
2565         snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
2566                  le32_to_cpu(ver->rom_version));
2567 
2568         err = request_firmware(&fw, fwname, &hdev->dev);
2569         if (err) {
2570                 BT_ERR("%s: failed to request NVM file: %s (%d)",
2571                        hdev->name, fwname, err);
2572                 return err;
2573         }
2574 
2575         BT_INFO("%s: using NVM file: %s", hdev->name, fwname);
2576 
2577         err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
2578 
2579         release_firmware(fw);
2580 
2581         return err;
2582 }
2583 
2584 static int btusb_setup_qca(struct hci_dev *hdev)
2585 {
2586         const struct qca_device_info *info = NULL;
2587         struct qca_version ver;
2588         u32 ver_rom;
2589         u8 status;
2590         int i, err;
2591 
2592         err = btusb_qca_send_vendor_req(hdev, QCA_GET_TARGET_VERSION, &ver,
2593                                         sizeof(ver));
2594         if (err < 0)
2595                 return err;
2596 
2597         ver_rom = le32_to_cpu(ver.rom_version);
2598         for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
2599                 if (ver_rom == qca_devices_table[i].rom_version)
2600                         info = &qca_devices_table[i];
2601         }
2602         if (!info) {
2603                 BT_ERR("%s: don't support firmware rome 0x%x", hdev->name,
2604                        ver_rom);
2605                 return -ENODEV;
2606         }
2607 
2608         err = btusb_qca_send_vendor_req(hdev, QCA_CHECK_STATUS, &status,
2609                                         sizeof(status));
2610         if (err < 0)
2611                 return err;
2612 
2613         if (!(status & QCA_PATCH_UPDATED)) {
2614                 err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
2615                 if (err < 0)
2616                         return err;
2617         }
2618 
2619         if (!(status & QCA_SYSCFG_UPDATED)) {
2620                 err = btusb_setup_qca_load_nvm(hdev, &ver, info);
2621                 if (err < 0)
2622                         return err;
2623         }
2624 
2625         return 0;
2626 }
2627 
2628 #ifdef CONFIG_BT_HCIBTUSB_BCM
2629 static inline int __set_diag_interface(struct hci_dev *hdev)
2630 {
2631         struct btusb_data *data = hci_get_drvdata(hdev);
2632         struct usb_interface *intf = data->diag;
2633         int i;
2634 
2635         if (!data->diag)
2636                 return -ENODEV;
2637 
2638         data->diag_tx_ep = NULL;
2639         data->diag_rx_ep = NULL;
2640 
2641         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2642                 struct usb_endpoint_descriptor *ep_desc;
2643 
2644                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2645 
2646                 if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2647                         data->diag_tx_ep = ep_desc;
2648                         continue;
2649                 }
2650 
2651                 if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2652                         data->diag_rx_ep = ep_desc;
2653                         continue;
2654                 }
2655         }
2656 
2657         if (!data->diag_tx_ep || !data->diag_rx_ep) {
2658                 BT_ERR("%s invalid diagnostic descriptors", hdev->name);
2659                 return -ENODEV;
2660         }
2661 
2662         return 0;
2663 }
2664 
2665 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
2666 {
2667         struct btusb_data *data = hci_get_drvdata(hdev);
2668         struct sk_buff *skb;
2669         struct urb *urb;
2670         unsigned int pipe;
2671 
2672         if (!data->diag_tx_ep)
2673                 return ERR_PTR(-ENODEV);
2674 
2675         urb = usb_alloc_urb(0, GFP_KERNEL);
2676         if (!urb)
2677                 return ERR_PTR(-ENOMEM);
2678 
2679         skb = bt_skb_alloc(2, GFP_KERNEL);
2680         if (!skb) {
2681                 usb_free_urb(urb);
2682                 return ERR_PTR(-ENOMEM);
2683         }
2684 
2685         *skb_put(skb, 1) = 0xf0;
2686         *skb_put(skb, 1) = enable;
2687 
2688         pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
2689 
2690         usb_fill_bulk_urb(urb, data->udev, pipe,
2691                           skb->data, skb->len, btusb_tx_complete, skb);
2692 
2693         skb->dev = (void *)hdev;
2694 
2695         return urb;
2696 }
2697 
2698 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
2699 {
2700         struct btusb_data *data = hci_get_drvdata(hdev);
2701         struct urb *urb;
2702 
2703         if (!data->diag)
2704                 return -ENODEV;
2705 
2706         if (!test_bit(HCI_RUNNING, &hdev->flags))
2707                 return -ENETDOWN;
2708 
2709         urb = alloc_diag_urb(hdev, enable);
2710         if (IS_ERR(urb))
2711                 return PTR_ERR(urb);
2712 
2713         return submit_or_queue_tx_urb(hdev, urb);
2714 }
2715 #endif
2716 
2717 static int btusb_probe(struct usb_interface *intf,
2718                        const struct usb_device_id *id)
2719 {
2720         struct usb_endpoint_descriptor *ep_desc;
2721         struct btusb_data *data;
2722         struct hci_dev *hdev;
2723         unsigned ifnum_base;
2724         int i, err;
2725 
2726         BT_DBG("intf %p id %p", intf, id);
2727 
2728         /* interface numbers are hardcoded in the spec */
2729         if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
2730                 if (!(id->driver_info & BTUSB_IFNUM_2))
2731                         return -ENODEV;
2732                 if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
2733                         return -ENODEV;
2734         }
2735 
2736         ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
2737 
2738         if (!id->driver_info) {
2739                 const struct usb_device_id *match;
2740 
2741                 match = usb_match_id(intf, blacklist_table);
2742                 if (match)
2743                         id = match;
2744         }
2745 
2746         if (id->driver_info == BTUSB_IGNORE)
2747                 return -ENODEV;
2748 
2749         if (id->driver_info & BTUSB_ATH3012) {
2750                 struct usb_device *udev = interface_to_usbdev(intf);
2751 
2752                 /* Old firmware would otherwise let ath3k driver load
2753                  * patch and sysconfig files */
2754                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
2755                         return -ENODEV;
2756         }
2757 
2758         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
2759         if (!data)
2760                 return -ENOMEM;
2761 
2762         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2763                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2764 
2765                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
2766                         data->intr_ep = ep_desc;
2767                         continue;
2768                 }
2769 
2770                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2771                         data->bulk_tx_ep = ep_desc;
2772                         continue;
2773                 }
2774 
2775                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2776                         data->bulk_rx_ep = ep_desc;
2777                         continue;
2778                 }
2779         }
2780 
2781         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
2782                 return -ENODEV;
2783 
2784         if (id->driver_info & BTUSB_AMP) {
2785                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
2786                 data->cmdreq = 0x2b;
2787         } else {
2788                 data->cmdreq_type = USB_TYPE_CLASS;
2789                 data->cmdreq = 0x00;
2790         }
2791 
2792         data->udev = interface_to_usbdev(intf);
2793         data->intf = intf;
2794 
2795         INIT_WORK(&data->work, btusb_work);
2796         INIT_WORK(&data->waker, btusb_waker);
2797         init_usb_anchor(&data->deferred);
2798         init_usb_anchor(&data->tx_anchor);
2799         spin_lock_init(&data->txlock);
2800 
2801         init_usb_anchor(&data->intr_anchor);
2802         init_usb_anchor(&data->bulk_anchor);
2803         init_usb_anchor(&data->isoc_anchor);
2804         init_usb_anchor(&data->diag_anchor);
2805         spin_lock_init(&data->rxlock);
2806 
2807         if (id->driver_info & BTUSB_INTEL_NEW) {
2808                 data->recv_event = btusb_recv_event_intel;
2809                 data->recv_bulk = btusb_recv_bulk_intel;
2810                 set_bit(BTUSB_BOOTLOADER, &data->flags);
2811         } else {
2812                 data->recv_event = hci_recv_frame;
2813                 data->recv_bulk = btusb_recv_bulk;
2814         }
2815 
2816         hdev = hci_alloc_dev();
2817         if (!hdev)
2818                 return -ENOMEM;
2819 
2820         hdev->bus = HCI_USB;
2821         hci_set_drvdata(hdev, data);
2822 
2823         if (id->driver_info & BTUSB_AMP)
2824                 hdev->dev_type = HCI_AMP;
2825         else
2826                 hdev->dev_type = HCI_BREDR;
2827 
2828         data->hdev = hdev;
2829 
2830         SET_HCIDEV_DEV(hdev, &intf->dev);
2831 
2832         hdev->open   = btusb_open;
2833         hdev->close  = btusb_close;
2834         hdev->flush  = btusb_flush;
2835         hdev->send   = btusb_send_frame;
2836         hdev->notify = btusb_notify;
2837 
2838         if (id->driver_info & BTUSB_BCM2045)
2839                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2840 
2841         if (id->driver_info & BTUSB_BCM92035)
2842                 hdev->setup = btusb_setup_bcm92035;
2843 
2844 #ifdef CONFIG_BT_HCIBTUSB_BCM
2845         if (id->driver_info & BTUSB_BCM_PATCHRAM) {
2846                 hdev->manufacturer = 15;
2847                 hdev->setup = btbcm_setup_patchram;
2848                 hdev->set_diag = btusb_bcm_set_diag;
2849                 hdev->set_bdaddr = btbcm_set_bdaddr;
2850 
2851                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2852                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2853         }
2854 
2855         if (id->driver_info & BTUSB_BCM_APPLE) {
2856                 hdev->manufacturer = 15;
2857                 hdev->setup = btbcm_setup_apple;
2858                 hdev->set_diag = btusb_bcm_set_diag;
2859 
2860                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2861                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2862         }
2863 #endif
2864 
2865         if (id->driver_info & BTUSB_INTEL) {
2866                 hdev->manufacturer = 2;
2867                 hdev->setup = btusb_setup_intel;
2868                 hdev->shutdown = btusb_shutdown_intel;
2869                 hdev->set_diag = btintel_set_diag_mfg;
2870                 hdev->set_bdaddr = btintel_set_bdaddr;
2871                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2872                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2873                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2874         }
2875 
2876         if (id->driver_info & BTUSB_INTEL_NEW) {
2877                 hdev->manufacturer = 2;
2878                 hdev->send = btusb_send_frame_intel;
2879                 hdev->setup = btusb_setup_intel_new;
2880                 hdev->hw_error = btintel_hw_error;
2881                 hdev->set_diag = btintel_set_diag;
2882                 hdev->set_bdaddr = btintel_set_bdaddr;
2883                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2884                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2885         }
2886 
2887         if (id->driver_info & BTUSB_MARVELL)
2888                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
2889 
2890         if (id->driver_info & BTUSB_SWAVE) {
2891                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
2892                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
2893         }
2894 
2895         if (id->driver_info & BTUSB_INTEL_BOOT) {
2896                 hdev->manufacturer = 2;
2897                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2898         }
2899 
2900         if (id->driver_info & BTUSB_ATH3012) {
2901                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2902                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2903                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2904         }
2905 
2906         if (id->driver_info & BTUSB_QCA_ROME) {
2907                 data->setup_on_usb = btusb_setup_qca;
2908                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2909         }
2910 
2911 #ifdef CONFIG_BT_HCIBTUSB_RTL
2912         if (id->driver_info & BTUSB_REALTEK) {
2913                 hdev->setup = btrtl_setup_realtek;
2914 
2915                 /* Realtek devices lose their updated firmware over suspend,
2916                  * but the USB hub doesn't notice any status change.
2917                  * Explicitly request a device reset on resume.
2918                  */
2919                 set_bit(BTUSB_RESET_RESUME, &data->flags);
2920         }
2921 #endif
2922 
2923         if (id->driver_info & BTUSB_AMP) {
2924                 /* AMP controllers do not support SCO packets */
2925                 data->isoc = NULL;
2926         } else {
2927                 /* Interface orders are hardcoded in the specification */
2928                 data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
2929         }
2930 
2931         if (!reset)
2932                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2933 
2934         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
2935                 if (!disable_scofix)
2936                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
2937         }
2938 
2939         if (id->driver_info & BTUSB_BROKEN_ISOC)
2940                 data->isoc = NULL;
2941 
2942         if (id->driver_info & BTUSB_DIGIANSWER) {
2943                 data->cmdreq_type = USB_TYPE_VENDOR;
2944                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2945         }
2946 
2947         if (id->driver_info & BTUSB_CSR) {
2948                 struct usb_device *udev = data->udev;
2949                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
2950 
2951                 /* Old firmware would otherwise execute USB reset */
2952                 if (bcdDevice < 0x117)
2953                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2954 
2955                 /* Fake CSR devices with broken commands */
2956                 if (bcdDevice <= 0x100 || bcdDevice == 0x134)
2957                         hdev->setup = btusb_setup_csr;
2958 
2959                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2960         }
2961 
2962         if (id->driver_info & BTUSB_SNIFFER) {
2963                 struct usb_device *udev = data->udev;
2964 
2965                 /* New sniffer firmware has crippled HCI interface */
2966                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
2967                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2968         }
2969 
2970         if (id->driver_info & BTUSB_INTEL_BOOT) {
2971                 /* A bug in the bootloader causes that interrupt interface is
2972                  * only enabled after receiving SetInterface(0, AltSetting=0).
2973                  */
2974                 err = usb_set_interface(data->udev, 0, 0);
2975                 if (err < 0) {
2976                         BT_ERR("failed to set interface 0, alt 0 %d", err);
2977                         hci_free_dev(hdev);
2978                         return err;
2979                 }
2980         }
2981 
2982         if (data->isoc) {
2983                 err = usb_driver_claim_interface(&btusb_driver,
2984                                                  data->isoc, data);
2985                 if (err < 0) {
2986                         hci_free_dev(hdev);
2987                         return err;
2988                 }
2989         }
2990 
2991 #ifdef CONFIG_BT_HCIBTUSB_BCM
2992         if (data->diag) {
2993                 if (!usb_driver_claim_interface(&btusb_driver,
2994                                                 data->diag, data))
2995                         __set_diag_interface(hdev);
2996                 else
2997                         data->diag = NULL;
2998         }
2999 #endif
3000 
3001         err = hci_register_dev(hdev);
3002         if (err < 0) {
3003                 hci_free_dev(hdev);
3004                 return err;
3005         }
3006 
3007         usb_set_intfdata(intf, data);
3008 
3009         return 0;
3010 }
3011 
3012 static void btusb_disconnect(struct usb_interface *intf)
3013 {
3014         struct btusb_data *data = usb_get_intfdata(intf);
3015         struct hci_dev *hdev;
3016 
3017         BT_DBG("intf %p", intf);
3018 
3019         if (!data)
3020                 return;
3021 
3022         hdev = data->hdev;
3023         usb_set_intfdata(data->intf, NULL);
3024 
3025         if (data->isoc)
3026                 usb_set_intfdata(data->isoc, NULL);
3027 
3028         if (data->diag)
3029                 usb_set_intfdata(data->diag, NULL);
3030 
3031         hci_unregister_dev(hdev);
3032 
3033         if (intf == data->intf) {
3034                 if (data->isoc)
3035                         usb_driver_release_interface(&btusb_driver, data->isoc);
3036                 if (data->diag)
3037                         usb_driver_release_interface(&btusb_driver, data->diag);
3038         } else if (intf == data->isoc) {
3039                 if (data->diag)
3040                         usb_driver_release_interface(&btusb_driver, data->diag);
3041                 usb_driver_release_interface(&btusb_driver, data->intf);
3042         } else if (intf == data->diag) {
3043                 usb_driver_release_interface(&btusb_driver, data->intf);
3044                 if (data->isoc)
3045                         usb_driver_release_interface(&btusb_driver, data->isoc);
3046         }
3047 
3048         hci_free_dev(hdev);
3049 }
3050 
3051 #ifdef CONFIG_PM
3052 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
3053 {
3054         struct btusb_data *data = usb_get_intfdata(intf);
3055 
3056         BT_DBG("intf %p", intf);
3057 
3058         if (data->suspend_count++)
3059                 return 0;
3060 
3061         spin_lock_irq(&data->txlock);
3062         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
3063                 set_bit(BTUSB_SUSPENDING, &data->flags);
3064                 spin_unlock_irq(&data->txlock);
3065         } else {
3066                 spin_unlock_irq(&data->txlock);
3067                 data->suspend_count--;
3068                 return -EBUSY;
3069         }
3070 
3071         cancel_work_sync(&data->work);
3072 
3073         btusb_stop_traffic(data);
3074         usb_kill_anchored_urbs(&data->tx_anchor);
3075 
3076         /* Optionally request a device reset on resume, but only when
3077          * wakeups are disabled. If wakeups are enabled we assume the
3078          * device will stay powered up throughout suspend.
3079          */
3080         if (test_bit(BTUSB_RESET_RESUME, &data->flags) &&
3081             !device_may_wakeup(&data->udev->dev))
3082                 data->udev->reset_resume = 1;
3083 
3084         return 0;
3085 }
3086 
3087 static void play_deferred(struct btusb_data *data)
3088 {
3089         struct urb *urb;
3090         int err;
3091 
3092         while ((urb = usb_get_from_anchor(&data->deferred))) {
3093                 err = usb_submit_urb(urb, GFP_ATOMIC);
3094                 if (err < 0)
3095                         break;
3096 
3097                 data->tx_in_flight++;
3098         }
3099         usb_scuttle_anchored_urbs(&data->deferred);
3100 }
3101 
3102 static int btusb_resume(struct usb_interface *intf)
3103 {
3104         struct btusb_data *data = usb_get_intfdata(intf);
3105         struct hci_dev *hdev = data->hdev;
3106         int err = 0;
3107 
3108         BT_DBG("intf %p", intf);
3109 
3110         if (--data->suspend_count)
3111                 return 0;
3112 
3113         if (!test_bit(HCI_RUNNING, &hdev->flags))
3114                 goto done;
3115 
3116         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
3117                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
3118                 if (err < 0) {
3119                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
3120                         goto failed;
3121                 }
3122         }
3123 
3124         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
3125                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
3126                 if (err < 0) {
3127                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
3128                         goto failed;
3129                 }
3130 
3131                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
3132         }
3133 
3134         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
3135                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
3136                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
3137                 else
3138                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
3139         }
3140 
3141         spin_lock_irq(&data->txlock);
3142         play_deferred(data);
3143         clear_bit(BTUSB_SUSPENDING, &data->flags);
3144         spin_unlock_irq(&data->txlock);
3145         schedule_work(&data->work);
3146 
3147         return 0;
3148 
3149 failed:
3150         usb_scuttle_anchored_urbs(&data->deferred);
3151 done:
3152         spin_lock_irq(&data->txlock);
3153         clear_bit(BTUSB_SUSPENDING, &data->flags);
3154         spin_unlock_irq(&data->txlock);
3155 
3156         return err;
3157 }
3158 #endif
3159 
3160 static struct usb_driver btusb_driver = {
3161         .name           = "btusb",
3162         .probe          = btusb_probe,
3163         .disconnect     = btusb_disconnect,
3164 #ifdef CONFIG_PM
3165         .suspend        = btusb_suspend,
3166         .resume         = btusb_resume,
3167 #endif
3168         .id_table       = btusb_table,
3169         .supports_autosuspend = 1,
3170         .disable_hub_initiated_lpm = 1,
3171 };
3172 
3173 module_usb_driver(btusb_driver);
3174 
3175 module_param(disable_scofix, bool, 0644);
3176 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
3177 
3178 module_param(force_scofix, bool, 0644);
3179 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
3180 
3181 module_param(reset, bool, 0644);
3182 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
3183 
3184 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
3185 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
3186 MODULE_VERSION(VERSION);
3187 MODULE_LICENSE("GPL");
3188 

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