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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         { USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
240 
241         /* Atheros AR5BBU12 with sflash firmware */
242         { USB_DEVICE(0x0489, 0xe02c), .driver_info = BTUSB_IGNORE },
243 
244         /* Atheros AR5BBU12 with sflash firmware */
245         { USB_DEVICE(0x0489, 0xe036), .driver_info = BTUSB_ATH3012 },
246         { USB_DEVICE(0x0489, 0xe03c), .driver_info = BTUSB_ATH3012 },
247 
248         /* QCA ROME chipset */
249         { USB_DEVICE(0x0cf3, 0xe007), .driver_info = BTUSB_QCA_ROME },
250         { USB_DEVICE(0x0cf3, 0xe300), .driver_info = BTUSB_QCA_ROME },
251         { USB_DEVICE(0x0cf3, 0xe360), .driver_info = BTUSB_QCA_ROME },
252 
253         /* Broadcom BCM2035 */
254         { USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
255         { USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
256         { USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
257 
258         /* Broadcom BCM2045 */
259         { USB_DEVICE(0x0a5c, 0x2039), .driver_info = BTUSB_WRONG_SCO_MTU },
260         { USB_DEVICE(0x0a5c, 0x2101), .driver_info = BTUSB_WRONG_SCO_MTU },
261 
262         /* IBM/Lenovo ThinkPad with Broadcom chip */
263         { USB_DEVICE(0x0a5c, 0x201e), .driver_info = BTUSB_WRONG_SCO_MTU },
264         { USB_DEVICE(0x0a5c, 0x2110), .driver_info = BTUSB_WRONG_SCO_MTU },
265 
266         /* HP laptop with Broadcom chip */
267         { USB_DEVICE(0x03f0, 0x171d), .driver_info = BTUSB_WRONG_SCO_MTU },
268 
269         /* Dell laptop with Broadcom chip */
270         { USB_DEVICE(0x413c, 0x8126), .driver_info = BTUSB_WRONG_SCO_MTU },
271 
272         /* Dell Wireless 370 and 410 devices */
273         { USB_DEVICE(0x413c, 0x8152), .driver_info = BTUSB_WRONG_SCO_MTU },
274         { USB_DEVICE(0x413c, 0x8156), .driver_info = BTUSB_WRONG_SCO_MTU },
275 
276         /* Belkin F8T012 and F8T013 devices */
277         { USB_DEVICE(0x050d, 0x0012), .driver_info = BTUSB_WRONG_SCO_MTU },
278         { USB_DEVICE(0x050d, 0x0013), .driver_info = BTUSB_WRONG_SCO_MTU },
279 
280         /* Asus WL-BTD202 device */
281         { USB_DEVICE(0x0b05, 0x1715), .driver_info = BTUSB_WRONG_SCO_MTU },
282 
283         /* Kensington Bluetooth USB adapter */
284         { USB_DEVICE(0x047d, 0x105e), .driver_info = BTUSB_WRONG_SCO_MTU },
285 
286         /* RTX Telecom based adapters with buggy SCO support */
287         { USB_DEVICE(0x0400, 0x0807), .driver_info = BTUSB_BROKEN_ISOC },
288         { USB_DEVICE(0x0400, 0x080a), .driver_info = BTUSB_BROKEN_ISOC },
289 
290         /* CONWISE Technology based adapters with buggy SCO support */
291         { USB_DEVICE(0x0e5e, 0x6622), .driver_info = BTUSB_BROKEN_ISOC },
292 
293         /* Roper Class 1 Bluetooth Dongle (Silicon Wave based) */
294         { USB_DEVICE(0x1310, 0x0001), .driver_info = BTUSB_SWAVE },
295 
296         /* Digianswer devices */
297         { USB_DEVICE(0x08fd, 0x0001), .driver_info = BTUSB_DIGIANSWER },
298         { USB_DEVICE(0x08fd, 0x0002), .driver_info = BTUSB_IGNORE },
299 
300         /* CSR BlueCore Bluetooth Sniffer */
301         { USB_DEVICE(0x0a12, 0x0002),
302           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
303 
304         /* Frontline ComProbe Bluetooth Sniffer */
305         { USB_DEVICE(0x16d3, 0x0002),
306           .driver_info = BTUSB_SNIFFER | BTUSB_BROKEN_ISOC },
307 
308         /* Marvell Bluetooth devices */
309         { USB_DEVICE(0x1286, 0x2044), .driver_info = BTUSB_MARVELL },
310         { USB_DEVICE(0x1286, 0x2046), .driver_info = BTUSB_MARVELL },
311 
312         /* Intel Bluetooth devices */
313         { USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
314         { USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL },
315         { USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL },
316         { USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_NEW },
317 
318         /* Other Intel Bluetooth devices */
319         { USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
320           .driver_info = BTUSB_IGNORE },
321 
322         /* Realtek Bluetooth devices */
323         { USB_VENDOR_AND_INTERFACE_INFO(0x0bda, 0xe0, 0x01, 0x01),
324           .driver_info = BTUSB_REALTEK },
325 
326         /* Additional Realtek 8723AE Bluetooth devices */
327         { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },
328         { USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },
329 
330         /* Additional Realtek 8723BE Bluetooth devices */
331         { USB_DEVICE(0x0489, 0xe085), .driver_info = BTUSB_REALTEK },
332         { USB_DEVICE(0x0489, 0xe08b), .driver_info = BTUSB_REALTEK },
333         { USB_DEVICE(0x13d3, 0x3410), .driver_info = BTUSB_REALTEK },
334         { USB_DEVICE(0x13d3, 0x3416), .driver_info = BTUSB_REALTEK },
335         { USB_DEVICE(0x13d3, 0x3459), .driver_info = BTUSB_REALTEK },
336 
337         /* Additional Realtek 8821AE Bluetooth devices */
338         { USB_DEVICE(0x0b05, 0x17dc), .driver_info = BTUSB_REALTEK },
339         { USB_DEVICE(0x13d3, 0x3414), .driver_info = BTUSB_REALTEK },
340         { USB_DEVICE(0x13d3, 0x3458), .driver_info = BTUSB_REALTEK },
341         { USB_DEVICE(0x13d3, 0x3461), .driver_info = BTUSB_REALTEK },
342         { USB_DEVICE(0x13d3, 0x3462), .driver_info = BTUSB_REALTEK },
343 
344         /* Silicon Wave based devices */
345         { USB_DEVICE(0x0c10, 0x0000), .driver_info = BTUSB_SWAVE },
346 
347         { }     /* Terminating entry */
348 };
349 
350 #define BTUSB_MAX_ISOC_FRAMES   10
351 
352 #define BTUSB_INTR_RUNNING      0
353 #define BTUSB_BULK_RUNNING      1
354 #define BTUSB_ISOC_RUNNING      2
355 #define BTUSB_SUSPENDING        3
356 #define BTUSB_DID_ISO_RESUME    4
357 #define BTUSB_BOOTLOADER        5
358 #define BTUSB_DOWNLOADING       6
359 #define BTUSB_FIRMWARE_LOADED   7
360 #define BTUSB_FIRMWARE_FAILED   8
361 #define BTUSB_BOOTING           9
362 #define BTUSB_RESET_RESUME      10
363 #define BTUSB_DIAG_RUNNING      11
364 
365 struct btusb_data {
366         struct hci_dev       *hdev;
367         struct usb_device    *udev;
368         struct usb_interface *intf;
369         struct usb_interface *isoc;
370         struct usb_interface *diag;
371 
372         unsigned long flags;
373 
374         struct work_struct work;
375         struct work_struct waker;
376 
377         struct usb_anchor deferred;
378         struct usb_anchor tx_anchor;
379         int tx_in_flight;
380         spinlock_t txlock;
381 
382         struct usb_anchor intr_anchor;
383         struct usb_anchor bulk_anchor;
384         struct usb_anchor isoc_anchor;
385         struct usb_anchor diag_anchor;
386         spinlock_t rxlock;
387 
388         struct sk_buff *evt_skb;
389         struct sk_buff *acl_skb;
390         struct sk_buff *sco_skb;
391 
392         struct usb_endpoint_descriptor *intr_ep;
393         struct usb_endpoint_descriptor *bulk_tx_ep;
394         struct usb_endpoint_descriptor *bulk_rx_ep;
395         struct usb_endpoint_descriptor *isoc_tx_ep;
396         struct usb_endpoint_descriptor *isoc_rx_ep;
397         struct usb_endpoint_descriptor *diag_tx_ep;
398         struct usb_endpoint_descriptor *diag_rx_ep;
399 
400         __u8 cmdreq_type;
401         __u8 cmdreq;
402 
403         unsigned int sco_num;
404         int isoc_altsetting;
405         int suspend_count;
406 
407         int (*recv_event)(struct hci_dev *hdev, struct sk_buff *skb);
408         int (*recv_bulk)(struct btusb_data *data, void *buffer, int count);
409 
410         int (*setup_on_usb)(struct hci_dev *hdev);
411 };
412 
413 static inline void btusb_free_frags(struct btusb_data *data)
414 {
415         unsigned long flags;
416 
417         spin_lock_irqsave(&data->rxlock, flags);
418 
419         kfree_skb(data->evt_skb);
420         data->evt_skb = NULL;
421 
422         kfree_skb(data->acl_skb);
423         data->acl_skb = NULL;
424 
425         kfree_skb(data->sco_skb);
426         data->sco_skb = NULL;
427 
428         spin_unlock_irqrestore(&data->rxlock, flags);
429 }
430 
431 static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count)
432 {
433         struct sk_buff *skb;
434         int err = 0;
435 
436         spin_lock(&data->rxlock);
437         skb = data->evt_skb;
438 
439         while (count) {
440                 int len;
441 
442                 if (!skb) {
443                         skb = bt_skb_alloc(HCI_MAX_EVENT_SIZE, GFP_ATOMIC);
444                         if (!skb) {
445                                 err = -ENOMEM;
446                                 break;
447                         }
448 
449                         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
450                         hci_skb_expect(skb) = HCI_EVENT_HDR_SIZE;
451                 }
452 
453                 len = min_t(uint, hci_skb_expect(skb), count);
454                 memcpy(skb_put(skb, len), buffer, len);
455 
456                 count -= len;
457                 buffer += len;
458                 hci_skb_expect(skb) -= len;
459 
460                 if (skb->len == HCI_EVENT_HDR_SIZE) {
461                         /* Complete event header */
462                         hci_skb_expect(skb) = hci_event_hdr(skb)->plen;
463 
464                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
465                                 kfree_skb(skb);
466                                 skb = NULL;
467 
468                                 err = -EILSEQ;
469                                 break;
470                         }
471                 }
472 
473                 if (!hci_skb_expect(skb)) {
474                         /* Complete frame */
475                         data->recv_event(data->hdev, skb);
476                         skb = NULL;
477                 }
478         }
479 
480         data->evt_skb = skb;
481         spin_unlock(&data->rxlock);
482 
483         return err;
484 }
485 
486 static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count)
487 {
488         struct sk_buff *skb;
489         int err = 0;
490 
491         spin_lock(&data->rxlock);
492         skb = data->acl_skb;
493 
494         while (count) {
495                 int len;
496 
497                 if (!skb) {
498                         skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
499                         if (!skb) {
500                                 err = -ENOMEM;
501                                 break;
502                         }
503 
504                         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
505                         hci_skb_expect(skb) = HCI_ACL_HDR_SIZE;
506                 }
507 
508                 len = min_t(uint, hci_skb_expect(skb), count);
509                 memcpy(skb_put(skb, len), buffer, len);
510 
511                 count -= len;
512                 buffer += len;
513                 hci_skb_expect(skb) -= len;
514 
515                 if (skb->len == HCI_ACL_HDR_SIZE) {
516                         __le16 dlen = hci_acl_hdr(skb)->dlen;
517 
518                         /* Complete ACL header */
519                         hci_skb_expect(skb) = __le16_to_cpu(dlen);
520 
521                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
522                                 kfree_skb(skb);
523                                 skb = NULL;
524 
525                                 err = -EILSEQ;
526                                 break;
527                         }
528                 }
529 
530                 if (!hci_skb_expect(skb)) {
531                         /* Complete frame */
532                         hci_recv_frame(data->hdev, skb);
533                         skb = NULL;
534                 }
535         }
536 
537         data->acl_skb = skb;
538         spin_unlock(&data->rxlock);
539 
540         return err;
541 }
542 
543 static int btusb_recv_isoc(struct btusb_data *data, void *buffer, int count)
544 {
545         struct sk_buff *skb;
546         int err = 0;
547 
548         spin_lock(&data->rxlock);
549         skb = data->sco_skb;
550 
551         while (count) {
552                 int len;
553 
554                 if (!skb) {
555                         skb = bt_skb_alloc(HCI_MAX_SCO_SIZE, GFP_ATOMIC);
556                         if (!skb) {
557                                 err = -ENOMEM;
558                                 break;
559                         }
560 
561                         hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
562                         hci_skb_expect(skb) = HCI_SCO_HDR_SIZE;
563                 }
564 
565                 len = min_t(uint, hci_skb_expect(skb), count);
566                 memcpy(skb_put(skb, len), buffer, len);
567 
568                 count -= len;
569                 buffer += len;
570                 hci_skb_expect(skb) -= len;
571 
572                 if (skb->len == HCI_SCO_HDR_SIZE) {
573                         /* Complete SCO header */
574                         hci_skb_expect(skb) = hci_sco_hdr(skb)->dlen;
575 
576                         if (skb_tailroom(skb) < hci_skb_expect(skb)) {
577                                 kfree_skb(skb);
578                                 skb = NULL;
579 
580                                 err = -EILSEQ;
581                                 break;
582                         }
583                 }
584 
585                 if (!hci_skb_expect(skb)) {
586                         /* Complete frame */
587                         hci_recv_frame(data->hdev, skb);
588                         skb = NULL;
589                 }
590         }
591 
592         data->sco_skb = skb;
593         spin_unlock(&data->rxlock);
594 
595         return err;
596 }
597 
598 static void btusb_intr_complete(struct urb *urb)
599 {
600         struct hci_dev *hdev = urb->context;
601         struct btusb_data *data = hci_get_drvdata(hdev);
602         int err;
603 
604         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
605                urb->actual_length);
606 
607         if (!test_bit(HCI_RUNNING, &hdev->flags))
608                 return;
609 
610         if (urb->status == 0) {
611                 hdev->stat.byte_rx += urb->actual_length;
612 
613                 if (btusb_recv_intr(data, urb->transfer_buffer,
614                                     urb->actual_length) < 0) {
615                         BT_ERR("%s corrupted event packet", hdev->name);
616                         hdev->stat.err_rx++;
617                 }
618         } else if (urb->status == -ENOENT) {
619                 /* Avoid suspend failed when usb_kill_urb */
620                 return;
621         }
622 
623         if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
624                 return;
625 
626         usb_mark_last_busy(data->udev);
627         usb_anchor_urb(urb, &data->intr_anchor);
628 
629         err = usb_submit_urb(urb, GFP_ATOMIC);
630         if (err < 0) {
631                 /* -EPERM: urb is being killed;
632                  * -ENODEV: device got disconnected */
633                 if (err != -EPERM && err != -ENODEV)
634                         BT_ERR("%s urb %p failed to resubmit (%d)",
635                                hdev->name, urb, -err);
636                 usb_unanchor_urb(urb);
637         }
638 }
639 
640 static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
641 {
642         struct btusb_data *data = hci_get_drvdata(hdev);
643         struct urb *urb;
644         unsigned char *buf;
645         unsigned int pipe;
646         int err, size;
647 
648         BT_DBG("%s", hdev->name);
649 
650         if (!data->intr_ep)
651                 return -ENODEV;
652 
653         urb = usb_alloc_urb(0, mem_flags);
654         if (!urb)
655                 return -ENOMEM;
656 
657         size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
658 
659         buf = kmalloc(size, mem_flags);
660         if (!buf) {
661                 usb_free_urb(urb);
662                 return -ENOMEM;
663         }
664 
665         pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
666 
667         usb_fill_int_urb(urb, data->udev, pipe, buf, size,
668                          btusb_intr_complete, hdev, data->intr_ep->bInterval);
669 
670         urb->transfer_flags |= URB_FREE_BUFFER;
671 
672         usb_anchor_urb(urb, &data->intr_anchor);
673 
674         err = usb_submit_urb(urb, mem_flags);
675         if (err < 0) {
676                 if (err != -EPERM && err != -ENODEV)
677                         BT_ERR("%s urb %p submission failed (%d)",
678                                hdev->name, urb, -err);
679                 usb_unanchor_urb(urb);
680         }
681 
682         usb_free_urb(urb);
683 
684         return err;
685 }
686 
687 static void btusb_bulk_complete(struct urb *urb)
688 {
689         struct hci_dev *hdev = urb->context;
690         struct btusb_data *data = hci_get_drvdata(hdev);
691         int err;
692 
693         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
694                urb->actual_length);
695 
696         if (!test_bit(HCI_RUNNING, &hdev->flags))
697                 return;
698 
699         if (urb->status == 0) {
700                 hdev->stat.byte_rx += urb->actual_length;
701 
702                 if (data->recv_bulk(data, urb->transfer_buffer,
703                                     urb->actual_length) < 0) {
704                         BT_ERR("%s corrupted ACL packet", hdev->name);
705                         hdev->stat.err_rx++;
706                 }
707         } else if (urb->status == -ENOENT) {
708                 /* Avoid suspend failed when usb_kill_urb */
709                 return;
710         }
711 
712         if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
713                 return;
714 
715         usb_anchor_urb(urb, &data->bulk_anchor);
716         usb_mark_last_busy(data->udev);
717 
718         err = usb_submit_urb(urb, GFP_ATOMIC);
719         if (err < 0) {
720                 /* -EPERM: urb is being killed;
721                  * -ENODEV: device got disconnected */
722                 if (err != -EPERM && err != -ENODEV)
723                         BT_ERR("%s urb %p failed to resubmit (%d)",
724                                hdev->name, urb, -err);
725                 usb_unanchor_urb(urb);
726         }
727 }
728 
729 static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
730 {
731         struct btusb_data *data = hci_get_drvdata(hdev);
732         struct urb *urb;
733         unsigned char *buf;
734         unsigned int pipe;
735         int err, size = HCI_MAX_FRAME_SIZE;
736 
737         BT_DBG("%s", hdev->name);
738 
739         if (!data->bulk_rx_ep)
740                 return -ENODEV;
741 
742         urb = usb_alloc_urb(0, mem_flags);
743         if (!urb)
744                 return -ENOMEM;
745 
746         buf = kmalloc(size, mem_flags);
747         if (!buf) {
748                 usb_free_urb(urb);
749                 return -ENOMEM;
750         }
751 
752         pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
753 
754         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
755                           btusb_bulk_complete, hdev);
756 
757         urb->transfer_flags |= URB_FREE_BUFFER;
758 
759         usb_mark_last_busy(data->udev);
760         usb_anchor_urb(urb, &data->bulk_anchor);
761 
762         err = usb_submit_urb(urb, mem_flags);
763         if (err < 0) {
764                 if (err != -EPERM && err != -ENODEV)
765                         BT_ERR("%s urb %p submission failed (%d)",
766                                hdev->name, urb, -err);
767                 usb_unanchor_urb(urb);
768         }
769 
770         usb_free_urb(urb);
771 
772         return err;
773 }
774 
775 static void btusb_isoc_complete(struct urb *urb)
776 {
777         struct hci_dev *hdev = urb->context;
778         struct btusb_data *data = hci_get_drvdata(hdev);
779         int i, err;
780 
781         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
782                urb->actual_length);
783 
784         if (!test_bit(HCI_RUNNING, &hdev->flags))
785                 return;
786 
787         if (urb->status == 0) {
788                 for (i = 0; i < urb->number_of_packets; i++) {
789                         unsigned int offset = urb->iso_frame_desc[i].offset;
790                         unsigned int length = urb->iso_frame_desc[i].actual_length;
791 
792                         if (urb->iso_frame_desc[i].status)
793                                 continue;
794 
795                         hdev->stat.byte_rx += length;
796 
797                         if (btusb_recv_isoc(data, urb->transfer_buffer + offset,
798                                             length) < 0) {
799                                 BT_ERR("%s corrupted SCO packet", hdev->name);
800                                 hdev->stat.err_rx++;
801                         }
802                 }
803         } else if (urb->status == -ENOENT) {
804                 /* Avoid suspend failed when usb_kill_urb */
805                 return;
806         }
807 
808         if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
809                 return;
810 
811         usb_anchor_urb(urb, &data->isoc_anchor);
812 
813         err = usb_submit_urb(urb, GFP_ATOMIC);
814         if (err < 0) {
815                 /* -EPERM: urb is being killed;
816                  * -ENODEV: device got disconnected */
817                 if (err != -EPERM && err != -ENODEV)
818                         BT_ERR("%s urb %p failed to resubmit (%d)",
819                                hdev->name, urb, -err);
820                 usb_unanchor_urb(urb);
821         }
822 }
823 
824 static inline void __fill_isoc_descriptor(struct urb *urb, int len, int mtu)
825 {
826         int i, offset = 0;
827 
828         BT_DBG("len %d mtu %d", len, mtu);
829 
830         for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
831                                         i++, offset += mtu, len -= mtu) {
832                 urb->iso_frame_desc[i].offset = offset;
833                 urb->iso_frame_desc[i].length = mtu;
834         }
835 
836         if (len && i < BTUSB_MAX_ISOC_FRAMES) {
837                 urb->iso_frame_desc[i].offset = offset;
838                 urb->iso_frame_desc[i].length = len;
839                 i++;
840         }
841 
842         urb->number_of_packets = i;
843 }
844 
845 static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
846 {
847         struct btusb_data *data = hci_get_drvdata(hdev);
848         struct urb *urb;
849         unsigned char *buf;
850         unsigned int pipe;
851         int err, size;
852 
853         BT_DBG("%s", hdev->name);
854 
855         if (!data->isoc_rx_ep)
856                 return -ENODEV;
857 
858         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
859         if (!urb)
860                 return -ENOMEM;
861 
862         size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
863                                                 BTUSB_MAX_ISOC_FRAMES;
864 
865         buf = kmalloc(size, mem_flags);
866         if (!buf) {
867                 usb_free_urb(urb);
868                 return -ENOMEM;
869         }
870 
871         pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);
872 
873         usb_fill_int_urb(urb, data->udev, pipe, buf, size, btusb_isoc_complete,
874                          hdev, data->isoc_rx_ep->bInterval);
875 
876         urb->transfer_flags = URB_FREE_BUFFER | URB_ISO_ASAP;
877 
878         __fill_isoc_descriptor(urb, size,
879                                le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));
880 
881         usb_anchor_urb(urb, &data->isoc_anchor);
882 
883         err = usb_submit_urb(urb, mem_flags);
884         if (err < 0) {
885                 if (err != -EPERM && err != -ENODEV)
886                         BT_ERR("%s urb %p submission failed (%d)",
887                                hdev->name, urb, -err);
888                 usb_unanchor_urb(urb);
889         }
890 
891         usb_free_urb(urb);
892 
893         return err;
894 }
895 
896 static void btusb_diag_complete(struct urb *urb)
897 {
898         struct hci_dev *hdev = urb->context;
899         struct btusb_data *data = hci_get_drvdata(hdev);
900         int err;
901 
902         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
903                urb->actual_length);
904 
905         if (urb->status == 0) {
906                 struct sk_buff *skb;
907 
908                 skb = bt_skb_alloc(urb->actual_length, GFP_ATOMIC);
909                 if (skb) {
910                         memcpy(skb_put(skb, urb->actual_length),
911                                urb->transfer_buffer, urb->actual_length);
912                         hci_recv_diag(hdev, skb);
913                 }
914         } else if (urb->status == -ENOENT) {
915                 /* Avoid suspend failed when usb_kill_urb */
916                 return;
917         }
918 
919         if (!test_bit(BTUSB_DIAG_RUNNING, &data->flags))
920                 return;
921 
922         usb_anchor_urb(urb, &data->diag_anchor);
923         usb_mark_last_busy(data->udev);
924 
925         err = usb_submit_urb(urb, GFP_ATOMIC);
926         if (err < 0) {
927                 /* -EPERM: urb is being killed;
928                  * -ENODEV: device got disconnected */
929                 if (err != -EPERM && err != -ENODEV)
930                         BT_ERR("%s urb %p failed to resubmit (%d)",
931                                hdev->name, urb, -err);
932                 usb_unanchor_urb(urb);
933         }
934 }
935 
936 static int btusb_submit_diag_urb(struct hci_dev *hdev, gfp_t mem_flags)
937 {
938         struct btusb_data *data = hci_get_drvdata(hdev);
939         struct urb *urb;
940         unsigned char *buf;
941         unsigned int pipe;
942         int err, size = HCI_MAX_FRAME_SIZE;
943 
944         BT_DBG("%s", hdev->name);
945 
946         if (!data->diag_rx_ep)
947                 return -ENODEV;
948 
949         urb = usb_alloc_urb(0, mem_flags);
950         if (!urb)
951                 return -ENOMEM;
952 
953         buf = kmalloc(size, mem_flags);
954         if (!buf) {
955                 usb_free_urb(urb);
956                 return -ENOMEM;
957         }
958 
959         pipe = usb_rcvbulkpipe(data->udev, data->diag_rx_ep->bEndpointAddress);
960 
961         usb_fill_bulk_urb(urb, data->udev, pipe, buf, size,
962                           btusb_diag_complete, hdev);
963 
964         urb->transfer_flags |= URB_FREE_BUFFER;
965 
966         usb_mark_last_busy(data->udev);
967         usb_anchor_urb(urb, &data->diag_anchor);
968 
969         err = usb_submit_urb(urb, mem_flags);
970         if (err < 0) {
971                 if (err != -EPERM && err != -ENODEV)
972                         BT_ERR("%s urb %p submission failed (%d)",
973                                hdev->name, urb, -err);
974                 usb_unanchor_urb(urb);
975         }
976 
977         usb_free_urb(urb);
978 
979         return err;
980 }
981 
982 static void btusb_tx_complete(struct urb *urb)
983 {
984         struct sk_buff *skb = urb->context;
985         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
986         struct btusb_data *data = hci_get_drvdata(hdev);
987 
988         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
989                urb->actual_length);
990 
991         if (!test_bit(HCI_RUNNING, &hdev->flags))
992                 goto done;
993 
994         if (!urb->status)
995                 hdev->stat.byte_tx += urb->transfer_buffer_length;
996         else
997                 hdev->stat.err_tx++;
998 
999 done:
1000         spin_lock(&data->txlock);
1001         data->tx_in_flight--;
1002         spin_unlock(&data->txlock);
1003 
1004         kfree(urb->setup_packet);
1005 
1006         kfree_skb(skb);
1007 }
1008 
1009 static void btusb_isoc_tx_complete(struct urb *urb)
1010 {
1011         struct sk_buff *skb = urb->context;
1012         struct hci_dev *hdev = (struct hci_dev *)skb->dev;
1013 
1014         BT_DBG("%s urb %p status %d count %d", hdev->name, urb, urb->status,
1015                urb->actual_length);
1016 
1017         if (!test_bit(HCI_RUNNING, &hdev->flags))
1018                 goto done;
1019 
1020         if (!urb->status)
1021                 hdev->stat.byte_tx += urb->transfer_buffer_length;
1022         else
1023                 hdev->stat.err_tx++;
1024 
1025 done:
1026         kfree(urb->setup_packet);
1027 
1028         kfree_skb(skb);
1029 }
1030 
1031 static int btusb_open(struct hci_dev *hdev)
1032 {
1033         struct btusb_data *data = hci_get_drvdata(hdev);
1034         int err;
1035 
1036         BT_DBG("%s", hdev->name);
1037 
1038         /* Patching USB firmware files prior to starting any URBs of HCI path
1039          * It is more safe to use USB bulk channel for downloading USB patch
1040          */
1041         if (data->setup_on_usb) {
1042                 err = data->setup_on_usb(hdev);
1043                 if (err < 0)
1044                         return err;
1045         }
1046 
1047         err = usb_autopm_get_interface(data->intf);
1048         if (err < 0)
1049                 return err;
1050 
1051         data->intf->needs_remote_wakeup = 1;
1052 
1053         if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
1054                 goto done;
1055 
1056         err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
1057         if (err < 0)
1058                 goto failed;
1059 
1060         err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1061         if (err < 0) {
1062                 usb_kill_anchored_urbs(&data->intr_anchor);
1063                 goto failed;
1064         }
1065 
1066         set_bit(BTUSB_BULK_RUNNING, &data->flags);
1067         btusb_submit_bulk_urb(hdev, GFP_KERNEL);
1068 
1069         if (data->diag) {
1070                 if (!btusb_submit_diag_urb(hdev, GFP_KERNEL))
1071                         set_bit(BTUSB_DIAG_RUNNING, &data->flags);
1072         }
1073 
1074 done:
1075         usb_autopm_put_interface(data->intf);
1076         return 0;
1077 
1078 failed:
1079         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1080         usb_autopm_put_interface(data->intf);
1081         return err;
1082 }
1083 
1084 static void btusb_stop_traffic(struct btusb_data *data)
1085 {
1086         usb_kill_anchored_urbs(&data->intr_anchor);
1087         usb_kill_anchored_urbs(&data->bulk_anchor);
1088         usb_kill_anchored_urbs(&data->isoc_anchor);
1089         usb_kill_anchored_urbs(&data->diag_anchor);
1090 }
1091 
1092 static int btusb_close(struct hci_dev *hdev)
1093 {
1094         struct btusb_data *data = hci_get_drvdata(hdev);
1095         int err;
1096 
1097         BT_DBG("%s", hdev->name);
1098 
1099         cancel_work_sync(&data->work);
1100         cancel_work_sync(&data->waker);
1101 
1102         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1103         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
1104         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
1105         clear_bit(BTUSB_DIAG_RUNNING, &data->flags);
1106 
1107         btusb_stop_traffic(data);
1108         btusb_free_frags(data);
1109 
1110         err = usb_autopm_get_interface(data->intf);
1111         if (err < 0)
1112                 goto failed;
1113 
1114         data->intf->needs_remote_wakeup = 0;
1115         usb_autopm_put_interface(data->intf);
1116 
1117 failed:
1118         usb_scuttle_anchored_urbs(&data->deferred);
1119         return 0;
1120 }
1121 
1122 static int btusb_flush(struct hci_dev *hdev)
1123 {
1124         struct btusb_data *data = hci_get_drvdata(hdev);
1125 
1126         BT_DBG("%s", hdev->name);
1127 
1128         usb_kill_anchored_urbs(&data->tx_anchor);
1129         btusb_free_frags(data);
1130 
1131         return 0;
1132 }
1133 
1134 static struct urb *alloc_ctrl_urb(struct hci_dev *hdev, struct sk_buff *skb)
1135 {
1136         struct btusb_data *data = hci_get_drvdata(hdev);
1137         struct usb_ctrlrequest *dr;
1138         struct urb *urb;
1139         unsigned int pipe;
1140 
1141         urb = usb_alloc_urb(0, GFP_KERNEL);
1142         if (!urb)
1143                 return ERR_PTR(-ENOMEM);
1144 
1145         dr = kmalloc(sizeof(*dr), GFP_KERNEL);
1146         if (!dr) {
1147                 usb_free_urb(urb);
1148                 return ERR_PTR(-ENOMEM);
1149         }
1150 
1151         dr->bRequestType = data->cmdreq_type;
1152         dr->bRequest     = data->cmdreq;
1153         dr->wIndex       = 0;
1154         dr->wValue       = 0;
1155         dr->wLength      = __cpu_to_le16(skb->len);
1156 
1157         pipe = usb_sndctrlpipe(data->udev, 0x00);
1158 
1159         usb_fill_control_urb(urb, data->udev, pipe, (void *)dr,
1160                              skb->data, skb->len, btusb_tx_complete, skb);
1161 
1162         skb->dev = (void *)hdev;
1163 
1164         return urb;
1165 }
1166 
1167 static struct urb *alloc_bulk_urb(struct hci_dev *hdev, struct sk_buff *skb)
1168 {
1169         struct btusb_data *data = hci_get_drvdata(hdev);
1170         struct urb *urb;
1171         unsigned int pipe;
1172 
1173         if (!data->bulk_tx_ep)
1174                 return ERR_PTR(-ENODEV);
1175 
1176         urb = usb_alloc_urb(0, GFP_KERNEL);
1177         if (!urb)
1178                 return ERR_PTR(-ENOMEM);
1179 
1180         pipe = usb_sndbulkpipe(data->udev, data->bulk_tx_ep->bEndpointAddress);
1181 
1182         usb_fill_bulk_urb(urb, data->udev, pipe,
1183                           skb->data, skb->len, btusb_tx_complete, skb);
1184 
1185         skb->dev = (void *)hdev;
1186 
1187         return urb;
1188 }
1189 
1190 static struct urb *alloc_isoc_urb(struct hci_dev *hdev, struct sk_buff *skb)
1191 {
1192         struct btusb_data *data = hci_get_drvdata(hdev);
1193         struct urb *urb;
1194         unsigned int pipe;
1195 
1196         if (!data->isoc_tx_ep)
1197                 return ERR_PTR(-ENODEV);
1198 
1199         urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_KERNEL);
1200         if (!urb)
1201                 return ERR_PTR(-ENOMEM);
1202 
1203         pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);
1204 
1205         usb_fill_int_urb(urb, data->udev, pipe,
1206                          skb->data, skb->len, btusb_isoc_tx_complete,
1207                          skb, data->isoc_tx_ep->bInterval);
1208 
1209         urb->transfer_flags  = URB_ISO_ASAP;
1210 
1211         __fill_isoc_descriptor(urb, skb->len,
1212                                le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));
1213 
1214         skb->dev = (void *)hdev;
1215 
1216         return urb;
1217 }
1218 
1219 static int submit_tx_urb(struct hci_dev *hdev, struct urb *urb)
1220 {
1221         struct btusb_data *data = hci_get_drvdata(hdev);
1222         int err;
1223 
1224         usb_anchor_urb(urb, &data->tx_anchor);
1225 
1226         err = usb_submit_urb(urb, GFP_KERNEL);
1227         if (err < 0) {
1228                 if (err != -EPERM && err != -ENODEV)
1229                         BT_ERR("%s urb %p submission failed (%d)",
1230                                hdev->name, urb, -err);
1231                 kfree(urb->setup_packet);
1232                 usb_unanchor_urb(urb);
1233         } else {
1234                 usb_mark_last_busy(data->udev);
1235         }
1236 
1237         usb_free_urb(urb);
1238         return err;
1239 }
1240 
1241 static int submit_or_queue_tx_urb(struct hci_dev *hdev, struct urb *urb)
1242 {
1243         struct btusb_data *data = hci_get_drvdata(hdev);
1244         unsigned long flags;
1245         bool suspending;
1246 
1247         spin_lock_irqsave(&data->txlock, flags);
1248         suspending = test_bit(BTUSB_SUSPENDING, &data->flags);
1249         if (!suspending)
1250                 data->tx_in_flight++;
1251         spin_unlock_irqrestore(&data->txlock, flags);
1252 
1253         if (!suspending)
1254                 return submit_tx_urb(hdev, urb);
1255 
1256         usb_anchor_urb(urb, &data->deferred);
1257         schedule_work(&data->waker);
1258 
1259         usb_free_urb(urb);
1260         return 0;
1261 }
1262 
1263 static int btusb_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1264 {
1265         struct urb *urb;
1266 
1267         BT_DBG("%s", hdev->name);
1268 
1269         switch (hci_skb_pkt_type(skb)) {
1270         case HCI_COMMAND_PKT:
1271                 urb = alloc_ctrl_urb(hdev, skb);
1272                 if (IS_ERR(urb))
1273                         return PTR_ERR(urb);
1274 
1275                 hdev->stat.cmd_tx++;
1276                 return submit_or_queue_tx_urb(hdev, urb);
1277 
1278         case HCI_ACLDATA_PKT:
1279                 urb = alloc_bulk_urb(hdev, skb);
1280                 if (IS_ERR(urb))
1281                         return PTR_ERR(urb);
1282 
1283                 hdev->stat.acl_tx++;
1284                 return submit_or_queue_tx_urb(hdev, urb);
1285 
1286         case HCI_SCODATA_PKT:
1287                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1288                         return -ENODEV;
1289 
1290                 urb = alloc_isoc_urb(hdev, skb);
1291                 if (IS_ERR(urb))
1292                         return PTR_ERR(urb);
1293 
1294                 hdev->stat.sco_tx++;
1295                 return submit_tx_urb(hdev, urb);
1296         }
1297 
1298         return -EILSEQ;
1299 }
1300 
1301 static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
1302 {
1303         struct btusb_data *data = hci_get_drvdata(hdev);
1304 
1305         BT_DBG("%s evt %d", hdev->name, evt);
1306 
1307         if (hci_conn_num(hdev, SCO_LINK) != data->sco_num) {
1308                 data->sco_num = hci_conn_num(hdev, SCO_LINK);
1309                 schedule_work(&data->work);
1310         }
1311 }
1312 
1313 static inline int __set_isoc_interface(struct hci_dev *hdev, int altsetting)
1314 {
1315         struct btusb_data *data = hci_get_drvdata(hdev);
1316         struct usb_interface *intf = data->isoc;
1317         struct usb_endpoint_descriptor *ep_desc;
1318         int i, err;
1319 
1320         if (!data->isoc)
1321                 return -ENODEV;
1322 
1323         err = usb_set_interface(data->udev, 1, altsetting);
1324         if (err < 0) {
1325                 BT_ERR("%s setting interface failed (%d)", hdev->name, -err);
1326                 return err;
1327         }
1328 
1329         data->isoc_altsetting = altsetting;
1330 
1331         data->isoc_tx_ep = NULL;
1332         data->isoc_rx_ep = NULL;
1333 
1334         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
1335                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
1336 
1337                 if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
1338                         data->isoc_tx_ep = ep_desc;
1339                         continue;
1340                 }
1341 
1342                 if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
1343                         data->isoc_rx_ep = ep_desc;
1344                         continue;
1345                 }
1346         }
1347 
1348         if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
1349                 BT_ERR("%s invalid SCO descriptors", hdev->name);
1350                 return -ENODEV;
1351         }
1352 
1353         return 0;
1354 }
1355 
1356 static void btusb_work(struct work_struct *work)
1357 {
1358         struct btusb_data *data = container_of(work, struct btusb_data, work);
1359         struct hci_dev *hdev = data->hdev;
1360         int new_alts;
1361         int err;
1362 
1363         if (data->sco_num > 0) {
1364                 if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
1365                         err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
1366                         if (err < 0) {
1367                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1368                                 usb_kill_anchored_urbs(&data->isoc_anchor);
1369                                 return;
1370                         }
1371 
1372                         set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
1373                 }
1374 
1375                 if (hdev->voice_setting & 0x0020) {
1376                         static const int alts[3] = { 2, 4, 5 };
1377 
1378                         new_alts = alts[data->sco_num - 1];
1379                 } else {
1380                         new_alts = data->sco_num;
1381                 }
1382 
1383                 if (data->isoc_altsetting != new_alts) {
1384                         unsigned long flags;
1385 
1386                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1387                         usb_kill_anchored_urbs(&data->isoc_anchor);
1388 
1389                         /* When isochronous alternate setting needs to be
1390                          * changed, because SCO connection has been added
1391                          * or removed, a packet fragment may be left in the
1392                          * reassembling state. This could lead to wrongly
1393                          * assembled fragments.
1394                          *
1395                          * Clear outstanding fragment when selecting a new
1396                          * alternate setting.
1397                          */
1398                         spin_lock_irqsave(&data->rxlock, flags);
1399                         kfree_skb(data->sco_skb);
1400                         data->sco_skb = NULL;
1401                         spin_unlock_irqrestore(&data->rxlock, flags);
1402 
1403                         if (__set_isoc_interface(hdev, new_alts) < 0)
1404                                 return;
1405                 }
1406 
1407                 if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
1408                         if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
1409                                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1410                         else
1411                                 btusb_submit_isoc_urb(hdev, GFP_KERNEL);
1412                 }
1413         } else {
1414                 clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
1415                 usb_kill_anchored_urbs(&data->isoc_anchor);
1416 
1417                 __set_isoc_interface(hdev, 0);
1418                 if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
1419                         usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
1420         }
1421 }
1422 
1423 static void btusb_waker(struct work_struct *work)
1424 {
1425         struct btusb_data *data = container_of(work, struct btusb_data, waker);
1426         int err;
1427 
1428         err = usb_autopm_get_interface(data->intf);
1429         if (err < 0)
1430                 return;
1431 
1432         usb_autopm_put_interface(data->intf);
1433 }
1434 
1435 static int btusb_setup_bcm92035(struct hci_dev *hdev)
1436 {
1437         struct sk_buff *skb;
1438         u8 val = 0x00;
1439 
1440         BT_DBG("%s", hdev->name);
1441 
1442         skb = __hci_cmd_sync(hdev, 0xfc3b, 1, &val, HCI_INIT_TIMEOUT);
1443         if (IS_ERR(skb))
1444                 BT_ERR("BCM92035 command failed (%ld)", -PTR_ERR(skb));
1445         else
1446                 kfree_skb(skb);
1447 
1448         return 0;
1449 }
1450 
1451 static int btusb_setup_csr(struct hci_dev *hdev)
1452 {
1453         struct hci_rp_read_local_version *rp;
1454         struct sk_buff *skb;
1455 
1456         BT_DBG("%s", hdev->name);
1457 
1458         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
1459                              HCI_INIT_TIMEOUT);
1460         if (IS_ERR(skb)) {
1461                 int err = PTR_ERR(skb);
1462                 BT_ERR("%s: CSR: Local version failed (%d)", hdev->name, err);
1463                 return err;
1464         }
1465 
1466         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
1467                 BT_ERR("%s: CSR: Local version length mismatch", hdev->name);
1468                 kfree_skb(skb);
1469                 return -EIO;
1470         }
1471 
1472         rp = (struct hci_rp_read_local_version *)skb->data;
1473 
1474         /* Detect controllers which aren't real CSR ones. */
1475         if (le16_to_cpu(rp->manufacturer) != 10 ||
1476             le16_to_cpu(rp->lmp_subver) == 0x0c5c) {
1477                 /* Clear the reset quirk since this is not an actual
1478                  * early Bluetooth 1.1 device from CSR.
1479                  */
1480                 clear_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
1481 
1482                 /* These fake CSR controllers have all a broken
1483                  * stored link key handling and so just disable it.
1484                  */
1485                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
1486         }
1487 
1488         kfree_skb(skb);
1489 
1490         return 0;
1491 }
1492 
1493 static const struct firmware *btusb_setup_intel_get_fw(struct hci_dev *hdev,
1494                                                        struct intel_version *ver)
1495 {
1496         const struct firmware *fw;
1497         char fwname[64];
1498         int ret;
1499 
1500         snprintf(fwname, sizeof(fwname),
1501                  "intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.bseq",
1502                  ver->hw_platform, ver->hw_variant, ver->hw_revision,
1503                  ver->fw_variant,  ver->fw_revision, ver->fw_build_num,
1504                  ver->fw_build_ww, ver->fw_build_yy);
1505 
1506         ret = request_firmware(&fw, fwname, &hdev->dev);
1507         if (ret < 0) {
1508                 if (ret == -EINVAL) {
1509                         BT_ERR("%s Intel firmware file request failed (%d)",
1510                                hdev->name, ret);
1511                         return NULL;
1512                 }
1513 
1514                 BT_ERR("%s failed to open Intel firmware file: %s(%d)",
1515                        hdev->name, fwname, ret);
1516 
1517                 /* If the correct firmware patch file is not found, use the
1518                  * default firmware patch file instead
1519                  */
1520                 snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bseq",
1521                          ver->hw_platform, ver->hw_variant);
1522                 if (request_firmware(&fw, fwname, &hdev->dev) < 0) {
1523                         BT_ERR("%s failed to open default Intel fw file: %s",
1524                                hdev->name, fwname);
1525                         return NULL;
1526                 }
1527         }
1528 
1529         BT_INFO("%s: Intel Bluetooth firmware file: %s", hdev->name, fwname);
1530 
1531         return fw;
1532 }
1533 
1534 static int btusb_setup_intel_patching(struct hci_dev *hdev,
1535                                       const struct firmware *fw,
1536                                       const u8 **fw_ptr, int *disable_patch)
1537 {
1538         struct sk_buff *skb;
1539         struct hci_command_hdr *cmd;
1540         const u8 *cmd_param;
1541         struct hci_event_hdr *evt = NULL;
1542         const u8 *evt_param = NULL;
1543         int remain = fw->size - (*fw_ptr - fw->data);
1544 
1545         /* The first byte indicates the types of the patch command or event.
1546          * 0x01 means HCI command and 0x02 is HCI event. If the first bytes
1547          * in the current firmware buffer doesn't start with 0x01 or
1548          * the size of remain buffer is smaller than HCI command header,
1549          * the firmware file is corrupted and it should stop the patching
1550          * process.
1551          */
1552         if (remain > HCI_COMMAND_HDR_SIZE && *fw_ptr[0] != 0x01) {
1553                 BT_ERR("%s Intel fw corrupted: invalid cmd read", hdev->name);
1554                 return -EINVAL;
1555         }
1556         (*fw_ptr)++;
1557         remain--;
1558 
1559         cmd = (struct hci_command_hdr *)(*fw_ptr);
1560         *fw_ptr += sizeof(*cmd);
1561         remain -= sizeof(*cmd);
1562 
1563         /* Ensure that the remain firmware data is long enough than the length
1564          * of command parameter. If not, the firmware file is corrupted.
1565          */
1566         if (remain < cmd->plen) {
1567                 BT_ERR("%s Intel fw corrupted: invalid cmd len", hdev->name);
1568                 return -EFAULT;
1569         }
1570 
1571         /* If there is a command that loads a patch in the firmware
1572          * file, then enable the patch upon success, otherwise just
1573          * disable the manufacturer mode, for example patch activation
1574          * is not required when the default firmware patch file is used
1575          * because there are no patch data to load.
1576          */
1577         if (*disable_patch && le16_to_cpu(cmd->opcode) == 0xfc8e)
1578                 *disable_patch = 0;
1579 
1580         cmd_param = *fw_ptr;
1581         *fw_ptr += cmd->plen;
1582         remain -= cmd->plen;
1583 
1584         /* This reads the expected events when the above command is sent to the
1585          * device. Some vendor commands expects more than one events, for
1586          * example command status event followed by vendor specific event.
1587          * For this case, it only keeps the last expected event. so the command
1588          * can be sent with __hci_cmd_sync_ev() which returns the sk_buff of
1589          * last expected event.
1590          */
1591         while (remain > HCI_EVENT_HDR_SIZE && *fw_ptr[0] == 0x02) {
1592                 (*fw_ptr)++;
1593                 remain--;
1594 
1595                 evt = (struct hci_event_hdr *)(*fw_ptr);
1596                 *fw_ptr += sizeof(*evt);
1597                 remain -= sizeof(*evt);
1598 
1599                 if (remain < evt->plen) {
1600                         BT_ERR("%s Intel fw corrupted: invalid evt len",
1601                                hdev->name);
1602                         return -EFAULT;
1603                 }
1604 
1605                 evt_param = *fw_ptr;
1606                 *fw_ptr += evt->plen;
1607                 remain -= evt->plen;
1608         }
1609 
1610         /* Every HCI commands in the firmware file has its correspond event.
1611          * If event is not found or remain is smaller than zero, the firmware
1612          * file is corrupted.
1613          */
1614         if (!evt || !evt_param || remain < 0) {
1615                 BT_ERR("%s Intel fw corrupted: invalid evt read", hdev->name);
1616                 return -EFAULT;
1617         }
1618 
1619         skb = __hci_cmd_sync_ev(hdev, le16_to_cpu(cmd->opcode), cmd->plen,
1620                                 cmd_param, evt->evt, HCI_INIT_TIMEOUT);
1621         if (IS_ERR(skb)) {
1622                 BT_ERR("%s sending Intel patch command (0x%4.4x) failed (%ld)",
1623                        hdev->name, cmd->opcode, PTR_ERR(skb));
1624                 return PTR_ERR(skb);
1625         }
1626 
1627         /* It ensures that the returned event matches the event data read from
1628          * the firmware file. At fist, it checks the length and then
1629          * the contents of the event.
1630          */
1631         if (skb->len != evt->plen) {
1632                 BT_ERR("%s mismatch event length (opcode 0x%4.4x)", hdev->name,
1633                        le16_to_cpu(cmd->opcode));
1634                 kfree_skb(skb);
1635                 return -EFAULT;
1636         }
1637 
1638         if (memcmp(skb->data, evt_param, evt->plen)) {
1639                 BT_ERR("%s mismatch event parameter (opcode 0x%4.4x)",
1640                        hdev->name, le16_to_cpu(cmd->opcode));
1641                 kfree_skb(skb);
1642                 return -EFAULT;
1643         }
1644         kfree_skb(skb);
1645 
1646         return 0;
1647 }
1648 
1649 static int btusb_setup_intel(struct hci_dev *hdev)
1650 {
1651         struct sk_buff *skb;
1652         const struct firmware *fw;
1653         const u8 *fw_ptr;
1654         int disable_patch, err;
1655         struct intel_version ver;
1656 
1657         BT_DBG("%s", hdev->name);
1658 
1659         /* The controller has a bug with the first HCI command sent to it
1660          * returning number of completed commands as zero. This would stall the
1661          * command processing in the Bluetooth core.
1662          *
1663          * As a workaround, send HCI Reset command first which will reset the
1664          * number of completed commands and allow normal command processing
1665          * from now on.
1666          */
1667         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
1668         if (IS_ERR(skb)) {
1669                 BT_ERR("%s sending initial HCI reset command failed (%ld)",
1670                        hdev->name, PTR_ERR(skb));
1671                 return PTR_ERR(skb);
1672         }
1673         kfree_skb(skb);
1674 
1675         /* Read Intel specific controller version first to allow selection of
1676          * which firmware file to load.
1677          *
1678          * The returned information are hardware variant and revision plus
1679          * firmware variant, revision and build number.
1680          */
1681         err = btintel_read_version(hdev, &ver);
1682         if (err)
1683                 return err;
1684 
1685         BT_INFO("%s: read Intel version: %02x%02x%02x%02x%02x%02x%02x%02x%02x",
1686                 hdev->name, ver.hw_platform, ver.hw_variant, ver.hw_revision,
1687                 ver.fw_variant,  ver.fw_revision, ver.fw_build_num,
1688                 ver.fw_build_ww, ver.fw_build_yy, ver.fw_patch_num);
1689 
1690         /* fw_patch_num indicates the version of patch the device currently
1691          * have. If there is no patch data in the device, it is always 0x00.
1692          * So, if it is other than 0x00, no need to patch the device again.
1693          */
1694         if (ver.fw_patch_num) {
1695                 BT_INFO("%s: Intel device is already patched. patch num: %02x",
1696                         hdev->name, ver.fw_patch_num);
1697                 goto complete;
1698         }
1699 
1700         /* Opens the firmware patch file based on the firmware version read
1701          * from the controller. If it fails to open the matching firmware
1702          * patch file, it tries to open the default firmware patch file.
1703          * If no patch file is found, allow the device to operate without
1704          * a patch.
1705          */
1706         fw = btusb_setup_intel_get_fw(hdev, &ver);
1707         if (!fw)
1708                 goto complete;
1709         fw_ptr = fw->data;
1710 
1711         /* Enable the manufacturer mode of the controller.
1712          * Only while this mode is enabled, the driver can download the
1713          * firmware patch data and configuration parameters.
1714          */
1715         err = btintel_enter_mfg(hdev);
1716         if (err) {
1717                 release_firmware(fw);
1718                 return err;
1719         }
1720 
1721         disable_patch = 1;
1722 
1723         /* The firmware data file consists of list of Intel specific HCI
1724          * commands and its expected events. The first byte indicates the
1725          * type of the message, either HCI command or HCI event.
1726          *
1727          * It reads the command and its expected event from the firmware file,
1728          * and send to the controller. Once __hci_cmd_sync_ev() returns,
1729          * the returned event is compared with the event read from the firmware
1730          * file and it will continue until all the messages are downloaded to
1731          * the controller.
1732          *
1733          * Once the firmware patching is completed successfully,
1734          * the manufacturer mode is disabled with reset and activating the
1735          * downloaded patch.
1736          *
1737          * If the firmware patching fails, the manufacturer mode is
1738          * disabled with reset and deactivating the patch.
1739          *
1740          * If the default patch file is used, no reset is done when disabling
1741          * the manufacturer.
1742          */
1743         while (fw->size > fw_ptr - fw->data) {
1744                 int ret;
1745 
1746                 ret = btusb_setup_intel_patching(hdev, fw, &fw_ptr,
1747                                                  &disable_patch);
1748                 if (ret < 0)
1749                         goto exit_mfg_deactivate;
1750         }
1751 
1752         release_firmware(fw);
1753 
1754         if (disable_patch)
1755                 goto exit_mfg_disable;
1756 
1757         /* Patching completed successfully and disable the manufacturer mode
1758          * with reset and activate the downloaded firmware patches.
1759          */
1760         err = btintel_exit_mfg(hdev, true, true);
1761         if (err)
1762                 return err;
1763 
1764         BT_INFO("%s: Intel Bluetooth firmware patch completed and activated",
1765                 hdev->name);
1766 
1767         goto complete;
1768 
1769 exit_mfg_disable:
1770         /* Disable the manufacturer mode without reset */
1771         err = btintel_exit_mfg(hdev, false, false);
1772         if (err)
1773                 return err;
1774 
1775         BT_INFO("%s: Intel Bluetooth firmware patch completed", hdev->name);
1776 
1777         goto complete;
1778 
1779 exit_mfg_deactivate:
1780         release_firmware(fw);
1781 
1782         /* Patching failed. Disable the manufacturer mode with reset and
1783          * deactivate the downloaded firmware patches.
1784          */
1785         err = btintel_exit_mfg(hdev, true, false);
1786         if (err)
1787                 return err;
1788 
1789         BT_INFO("%s: Intel Bluetooth firmware patch completed and deactivated",
1790                 hdev->name);
1791 
1792 complete:
1793         /* Set the event mask for Intel specific vendor events. This enables
1794          * a few extra events that are useful during general operation.
1795          */
1796         btintel_set_event_mask_mfg(hdev, false);
1797 
1798         btintel_check_bdaddr(hdev);
1799         return 0;
1800 }
1801 
1802 static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
1803 {
1804         struct sk_buff *skb;
1805         struct hci_event_hdr *hdr;
1806         struct hci_ev_cmd_complete *evt;
1807 
1808         skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
1809         if (!skb)
1810                 return -ENOMEM;
1811 
1812         hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
1813         hdr->evt = HCI_EV_CMD_COMPLETE;
1814         hdr->plen = sizeof(*evt) + 1;
1815 
1816         evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
1817         evt->ncmd = 0x01;
1818         evt->opcode = cpu_to_le16(opcode);
1819 
1820         *skb_put(skb, 1) = 0x00;
1821 
1822         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
1823 
1824         return hci_recv_frame(hdev, skb);
1825 }
1826 
1827 static int btusb_recv_bulk_intel(struct btusb_data *data, void *buffer,
1828                                  int count)
1829 {
1830         /* When the device is in bootloader mode, then it can send
1831          * events via the bulk endpoint. These events are treated the
1832          * same way as the ones received from the interrupt endpoint.
1833          */
1834         if (test_bit(BTUSB_BOOTLOADER, &data->flags))
1835                 return btusb_recv_intr(data, buffer, count);
1836 
1837         return btusb_recv_bulk(data, buffer, count);
1838 }
1839 
1840 static void btusb_intel_bootup(struct btusb_data *data, const void *ptr,
1841                                unsigned int len)
1842 {
1843         const struct intel_bootup *evt = ptr;
1844 
1845         if (len != sizeof(*evt))
1846                 return;
1847 
1848         if (test_and_clear_bit(BTUSB_BOOTING, &data->flags)) {
1849                 smp_mb__after_atomic();
1850                 wake_up_bit(&data->flags, BTUSB_BOOTING);
1851         }
1852 }
1853 
1854 static void btusb_intel_secure_send_result(struct btusb_data *data,
1855                                            const void *ptr, unsigned int len)
1856 {
1857         const struct intel_secure_send_result *evt = ptr;
1858 
1859         if (len != sizeof(*evt))
1860                 return;
1861 
1862         if (evt->result)
1863                 set_bit(BTUSB_FIRMWARE_FAILED, &data->flags);
1864 
1865         if (test_and_clear_bit(BTUSB_DOWNLOADING, &data->flags) &&
1866             test_bit(BTUSB_FIRMWARE_LOADED, &data->flags)) {
1867                 smp_mb__after_atomic();
1868                 wake_up_bit(&data->flags, BTUSB_DOWNLOADING);
1869         }
1870 }
1871 
1872 static int btusb_recv_event_intel(struct hci_dev *hdev, struct sk_buff *skb)
1873 {
1874         struct btusb_data *data = hci_get_drvdata(hdev);
1875 
1876         if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1877                 struct hci_event_hdr *hdr = (void *)skb->data;
1878 
1879                 if (skb->len > HCI_EVENT_HDR_SIZE && hdr->evt == 0xff &&
1880                     hdr->plen > 0) {
1881                         const void *ptr = skb->data + HCI_EVENT_HDR_SIZE + 1;
1882                         unsigned int len = skb->len - HCI_EVENT_HDR_SIZE - 1;
1883 
1884                         switch (skb->data[2]) {
1885                         case 0x02:
1886                                 /* When switching to the operational firmware
1887                                  * the device sends a vendor specific event
1888                                  * indicating that the bootup completed.
1889                                  */
1890                                 btusb_intel_bootup(data, ptr, len);
1891                                 break;
1892                         case 0x06:
1893                                 /* When the firmware loading completes the
1894                                  * device sends out a vendor specific event
1895                                  * indicating the result of the firmware
1896                                  * loading.
1897                                  */
1898                                 btusb_intel_secure_send_result(data, ptr, len);
1899                                 break;
1900                         }
1901                 }
1902         }
1903 
1904         return hci_recv_frame(hdev, skb);
1905 }
1906 
1907 static int btusb_send_frame_intel(struct hci_dev *hdev, struct sk_buff *skb)
1908 {
1909         struct btusb_data *data = hci_get_drvdata(hdev);
1910         struct urb *urb;
1911 
1912         BT_DBG("%s", hdev->name);
1913 
1914         switch (hci_skb_pkt_type(skb)) {
1915         case HCI_COMMAND_PKT:
1916                 if (test_bit(BTUSB_BOOTLOADER, &data->flags)) {
1917                         struct hci_command_hdr *cmd = (void *)skb->data;
1918                         __u16 opcode = le16_to_cpu(cmd->opcode);
1919 
1920                         /* When in bootloader mode and the command 0xfc09
1921                          * is received, it needs to be send down the
1922                          * bulk endpoint. So allocate a bulk URB instead.
1923                          */
1924                         if (opcode == 0xfc09)
1925                                 urb = alloc_bulk_urb(hdev, skb);
1926                         else
1927                                 urb = alloc_ctrl_urb(hdev, skb);
1928 
1929                         /* When the 0xfc01 command is issued to boot into
1930                          * the operational firmware, it will actually not
1931                          * send a command complete event. To keep the flow
1932                          * control working inject that event here.
1933                          */
1934                         if (opcode == 0xfc01)
1935                                 inject_cmd_complete(hdev, opcode);
1936                 } else {
1937                         urb = alloc_ctrl_urb(hdev, skb);
1938                 }
1939                 if (IS_ERR(urb))
1940                         return PTR_ERR(urb);
1941 
1942                 hdev->stat.cmd_tx++;
1943                 return submit_or_queue_tx_urb(hdev, urb);
1944 
1945         case HCI_ACLDATA_PKT:
1946                 urb = alloc_bulk_urb(hdev, skb);
1947                 if (IS_ERR(urb))
1948                         return PTR_ERR(urb);
1949 
1950                 hdev->stat.acl_tx++;
1951                 return submit_or_queue_tx_urb(hdev, urb);
1952 
1953         case HCI_SCODATA_PKT:
1954                 if (hci_conn_num(hdev, SCO_LINK) < 1)
1955                         return -ENODEV;
1956 
1957                 urb = alloc_isoc_urb(hdev, skb);
1958                 if (IS_ERR(urb))
1959                         return PTR_ERR(urb);
1960 
1961                 hdev->stat.sco_tx++;
1962                 return submit_tx_urb(hdev, urb);
1963         }
1964 
1965         return -EILSEQ;
1966 }
1967 
1968 static int btusb_setup_intel_new(struct hci_dev *hdev)
1969 {
1970         static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
1971                                           0x00, 0x08, 0x04, 0x00 };
1972         struct btusb_data *data = hci_get_drvdata(hdev);
1973         struct sk_buff *skb;
1974         struct intel_version ver;
1975         struct intel_boot_params *params;
1976         const struct firmware *fw;
1977         const u8 *fw_ptr;
1978         u32 frag_len;
1979         char fwname[64];
1980         ktime_t calltime, delta, rettime;
1981         unsigned long long duration;
1982         int err;
1983 
1984         BT_DBG("%s", hdev->name);
1985 
1986         calltime = ktime_get();
1987 
1988         /* Read the Intel version information to determine if the device
1989          * is in bootloader mode or if it already has operational firmware
1990          * loaded.
1991          */
1992         err = btintel_read_version(hdev, &ver);
1993         if (err)
1994                 return err;
1995 
1996         /* The hardware platform number has a fixed value of 0x37 and
1997          * for now only accept this single value.
1998          */
1999         if (ver.hw_platform != 0x37) {
2000                 BT_ERR("%s: Unsupported Intel hardware platform (%u)",
2001                        hdev->name, ver.hw_platform);
2002                 return -EINVAL;
2003         }
2004 
2005         /* At the moment the iBT 3.0 hardware variants 0x0b (LnP/SfP)
2006          * and 0x0c (WsP) are supported by this firmware loading method.
2007          *
2008          * This check has been put in place to ensure correct forward
2009          * compatibility options when newer hardware variants come along.
2010          */
2011         if (ver.hw_variant != 0x0b && ver.hw_variant != 0x0c) {
2012                 BT_ERR("%s: Unsupported Intel hardware variant (%u)",
2013                        hdev->name, ver.hw_variant);
2014                 return -EINVAL;
2015         }
2016 
2017         btintel_version_info(hdev, &ver);
2018 
2019         /* The firmware variant determines if the device is in bootloader
2020          * mode or is running operational firmware. The value 0x06 identifies
2021          * the bootloader and the value 0x23 identifies the operational
2022          * firmware.
2023          *
2024          * When the operational firmware is already present, then only
2025          * the check for valid Bluetooth device address is needed. This
2026          * determines if the device will be added as configured or
2027          * unconfigured controller.
2028          *
2029          * It is not possible to use the Secure Boot Parameters in this
2030          * case since that command is only available in bootloader mode.
2031          */
2032         if (ver.fw_variant == 0x23) {
2033                 clear_bit(BTUSB_BOOTLOADER, &data->flags);
2034                 btintel_check_bdaddr(hdev);
2035                 return 0;
2036         }
2037 
2038         /* If the device is not in bootloader mode, then the only possible
2039          * choice is to return an error and abort the device initialization.
2040          */
2041         if (ver.fw_variant != 0x06) {
2042                 BT_ERR("%s: Unsupported Intel firmware variant (%u)",
2043                        hdev->name, ver.fw_variant);
2044                 return -ENODEV;
2045         }
2046 
2047         /* Read the secure boot parameters to identify the operating
2048          * details of the bootloader.
2049          */
2050         skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
2051         if (IS_ERR(skb)) {
2052                 BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
2053                        hdev->name, PTR_ERR(skb));
2054                 return PTR_ERR(skb);
2055         }
2056 
2057         if (skb->len != sizeof(*params)) {
2058                 BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
2059                 kfree_skb(skb);
2060                 return -EILSEQ;
2061         }
2062 
2063         params = (struct intel_boot_params *)skb->data;
2064 
2065         BT_INFO("%s: Device revision is %u", hdev->name,
2066                 le16_to_cpu(params->dev_revid));
2067 
2068         BT_INFO("%s: Secure boot is %s", hdev->name,
2069                 params->secure_boot ? "enabled" : "disabled");
2070 
2071         BT_INFO("%s: OTP lock is %s", hdev->name,
2072                 params->otp_lock ? "enabled" : "disabled");
2073 
2074         BT_INFO("%s: API lock is %s", hdev->name,
2075                 params->api_lock ? "enabled" : "disabled");
2076 
2077         BT_INFO("%s: Debug lock is %s", hdev->name,
2078                 params->debug_lock ? "enabled" : "disabled");
2079 
2080         BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
2081                 params->min_fw_build_nn, params->min_fw_build_cw,
2082                 2000 + params->min_fw_build_yy);
2083 
2084         /* It is required that every single firmware fragment is acknowledged
2085          * with a command complete event. If the boot parameters indicate
2086          * that this bootloader does not send them, then abort the setup.
2087          */
2088         if (params->limited_cce != 0x00) {
2089                 BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
2090                        hdev->name, params->limited_cce);
2091                 kfree_skb(skb);
2092                 return -EINVAL;
2093         }
2094 
2095         /* If the OTP has no valid Bluetooth device address, then there will
2096          * also be no valid address for the operational firmware.
2097          */
2098         if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
2099                 BT_INFO("%s: No device address configured", hdev->name);
2100                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
2101         }
2102 
2103         /* With this Intel bootloader only the hardware variant and device
2104          * revision information are used to select the right firmware.
2105          *
2106          * Currently this bootloader support is limited to hardware variant
2107          * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
2108          */
2109         snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
2110                  le16_to_cpu(params->dev_revid));
2111 
2112         err = request_firmware(&fw, fwname, &hdev->dev);
2113         if (err < 0) {
2114                 BT_ERR("%s: Failed to load Intel firmware file (%d)",
2115                        hdev->name, err);
2116                 kfree_skb(skb);
2117                 return err;
2118         }
2119 
2120         BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);
2121 
2122         /* Save the DDC file name for later use to apply once the firmware
2123          * downloading is done.
2124          */
2125         snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
2126                  le16_to_cpu(params->dev_revid));
2127 
2128         kfree_skb(skb);
2129 
2130         if (fw->size < 644) {
2131                 BT_ERR("%s: Invalid size of firmware file (%zu)",
2132                        hdev->name, fw->size);
2133                 err = -EBADF;
2134                 goto done;
2135         }
2136 
2137         set_bit(BTUSB_DOWNLOADING, &data->flags);
2138 
2139         /* Start the firmware download transaction with the Init fragment
2140          * represented by the 128 bytes of CSS header.
2141          */
2142         err = btintel_secure_send(hdev, 0x00, 128, fw->data);
2143         if (err < 0) {
2144                 BT_ERR("%s: Failed to send firmware header (%d)",
2145                        hdev->name, err);
2146                 goto done;
2147         }
2148 
2149         /* Send the 256 bytes of public key information from the firmware
2150          * as the PKey fragment.
2151          */
2152         err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
2153         if (err < 0) {
2154                 BT_ERR("%s: Failed to send firmware public key (%d)",
2155                        hdev->name, err);
2156                 goto done;
2157         }
2158 
2159         /* Send the 256 bytes of signature information from the firmware
2160          * as the Sign fragment.
2161          */
2162         err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
2163         if (err < 0) {
2164                 BT_ERR("%s: Failed to send firmware signature (%d)",
2165                        hdev->name, err);
2166                 goto done;
2167         }
2168 
2169         fw_ptr = fw->data + 644;
2170         frag_len = 0;
2171 
2172         while (fw_ptr - fw->data < fw->size) {
2173                 struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
2174 
2175                 frag_len += sizeof(*cmd) + cmd->plen;
2176 
2177                 /* The parameter length of the secure send command requires
2178                  * a 4 byte alignment. It happens so that the firmware file
2179                  * contains proper Intel_NOP commands to align the fragments
2180                  * as needed.
2181                  *
2182                  * Send set of commands with 4 byte alignment from the
2183                  * firmware data buffer as a single Data fragement.
2184                  */
2185                 if (!(frag_len % 4)) {
2186                         err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
2187                         if (err < 0) {
2188                                 BT_ERR("%s: Failed to send firmware data (%d)",
2189                                        hdev->name, err);
2190                                 goto done;
2191                         }
2192 
2193                         fw_ptr += frag_len;
2194                         frag_len = 0;
2195                 }
2196         }
2197 
2198         set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
2199 
2200         BT_INFO("%s: Waiting for firmware download to complete", hdev->name);
2201 
2202         /* Before switching the device into operational mode and with that
2203          * booting the loaded firmware, wait for the bootloader notification
2204          * that all fragments have been successfully received.
2205          *
2206          * When the event processing receives the notification, then the
2207          * BTUSB_DOWNLOADING flag will be cleared.
2208          *
2209          * The firmware loading should not take longer than 5 seconds
2210          * and thus just timeout if that happens and fail the setup
2211          * of this device.
2212          */
2213         err = wait_on_bit_timeout(&data->flags, BTUSB_DOWNLOADING,
2214                                   TASK_INTERRUPTIBLE,
2215                                   msecs_to_jiffies(5000));
2216         if (err == 1) {
2217                 BT_ERR("%s: Firmware loading interrupted", hdev->name);
2218                 err = -EINTR;
2219                 goto done;
2220         }
2221 
2222         if (err) {
2223                 BT_ERR("%s: Firmware loading timeout", hdev->name);
2224                 err = -ETIMEDOUT;
2225                 goto done;
2226         }
2227 
2228         if (test_bit(BTUSB_FIRMWARE_FAILED, &data->flags)) {
2229                 BT_ERR("%s: Firmware loading failed", hdev->name);
2230                 err = -ENOEXEC;
2231                 goto done;
2232         }
2233 
2234         rettime = ktime_get();
2235         delta = ktime_sub(rettime, calltime);
2236         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2237 
2238         BT_INFO("%s: Firmware loaded in %llu usecs", hdev->name, duration);
2239 
2240 done:
2241         release_firmware(fw);
2242 
2243         if (err < 0)
2244                 return err;
2245 
2246         calltime = ktime_get();
2247 
2248         set_bit(BTUSB_BOOTING, &data->flags);
2249 
2250         skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param,
2251                              HCI_INIT_TIMEOUT);
2252         if (IS_ERR(skb))
2253                 return PTR_ERR(skb);
2254 
2255         kfree_skb(skb);
2256 
2257         /* The bootloader will not indicate when the device is ready. This
2258          * is done by the operational firmware sending bootup notification.
2259          *
2260          * Booting into operational firmware should not take longer than
2261          * 1 second. However if that happens, then just fail the setup
2262          * since something went wrong.
2263          */
2264         BT_INFO("%s: Waiting for device to boot", hdev->name);
2265 
2266         err = wait_on_bit_timeout(&data->flags, BTUSB_BOOTING,
2267                                   TASK_INTERRUPTIBLE,
2268                                   msecs_to_jiffies(1000));
2269 
2270         if (err == 1) {
2271                 BT_ERR("%s: Device boot interrupted", hdev->name);
2272                 return -EINTR;
2273         }
2274 
2275         if (err) {
2276                 BT_ERR("%s: Device boot timeout", hdev->name);
2277                 return -ETIMEDOUT;
2278         }
2279 
2280         rettime = ktime_get();
2281         delta = ktime_sub(rettime, calltime);
2282         duration = (unsigned long long) ktime_to_ns(delta) >> 10;
2283 
2284         BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration);
2285 
2286         clear_bit(BTUSB_BOOTLOADER, &data->flags);
2287 
2288         /* Once the device is running in operational mode, it needs to apply
2289          * the device configuration (DDC) parameters.
2290          *
2291          * The device can work without DDC parameters, so even if it fails
2292          * to load the file, no need to fail the setup.
2293          */
2294         btintel_load_ddc_config(hdev, fwname);
2295 
2296         /* Set the event mask for Intel specific vendor events. This enables
2297          * a few extra events that are useful during general operation. It
2298          * does not enable any debugging related events.
2299          *
2300          * The device will function correctly without these events enabled
2301          * and thus no need to fail the setup.
2302          */
2303         btintel_set_event_mask(hdev, false);
2304 
2305         return 0;
2306 }
2307 
2308 static int btusb_shutdown_intel(struct hci_dev *hdev)
2309 {
2310         struct sk_buff *skb;
2311         long ret;
2312 
2313         /* Some platforms have an issue with BT LED when the interface is
2314          * down or BT radio is turned off, which takes 5 seconds to BT LED
2315          * goes off. This command turns off the BT LED immediately.
2316          */
2317         skb = __hci_cmd_sync(hdev, 0xfc3f, 0, NULL, HCI_INIT_TIMEOUT);
2318         if (IS_ERR(skb)) {
2319                 ret = PTR_ERR(skb);
2320                 BT_ERR("%s: turning off Intel device LED failed (%ld)",
2321                        hdev->name, ret);
2322                 return ret;
2323         }
2324         kfree_skb(skb);
2325 
2326         return 0;
2327 }
2328 
2329 static int btusb_set_bdaddr_marvell(struct hci_dev *hdev,
2330                                     const bdaddr_t *bdaddr)
2331 {
2332         struct sk_buff *skb;
2333         u8 buf[8];
2334         long ret;
2335 
2336         buf[0] = 0xfe;
2337         buf[1] = sizeof(bdaddr_t);
2338         memcpy(buf + 2, bdaddr, sizeof(bdaddr_t));
2339 
2340         skb = __hci_cmd_sync(hdev, 0xfc22, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2341         if (IS_ERR(skb)) {
2342                 ret = PTR_ERR(skb);
2343                 BT_ERR("%s: changing Marvell device address failed (%ld)",
2344                        hdev->name, ret);
2345                 return ret;
2346         }
2347         kfree_skb(skb);
2348 
2349         return 0;
2350 }
2351 
2352 static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
2353                                     const bdaddr_t *bdaddr)
2354 {
2355         struct sk_buff *skb;
2356         u8 buf[10];
2357         long ret;
2358 
2359         buf[0] = 0x01;
2360         buf[1] = 0x01;
2361         buf[2] = 0x00;
2362         buf[3] = sizeof(bdaddr_t);
2363         memcpy(buf + 4, bdaddr, sizeof(bdaddr_t));
2364 
2365         skb = __hci_cmd_sync(hdev, 0xfc0b, sizeof(buf), buf, HCI_INIT_TIMEOUT);
2366         if (IS_ERR(skb)) {
2367                 ret = PTR_ERR(skb);
2368                 BT_ERR("%s: Change address command failed (%ld)",
2369                        hdev->name, ret);
2370                 return ret;
2371         }
2372         kfree_skb(skb);
2373 
2374         return 0;
2375 }
2376 
2377 #define QCA_DFU_PACKET_LEN      4096
2378 
2379 #define QCA_GET_TARGET_VERSION  0x09
2380 #define QCA_CHECK_STATUS        0x05
2381 #define QCA_DFU_DOWNLOAD        0x01
2382 
2383 #define QCA_SYSCFG_UPDATED      0x40
2384 #define QCA_PATCH_UPDATED       0x80
2385 #define QCA_DFU_TIMEOUT         3000
2386 
2387 struct qca_version {
2388         __le32  rom_version;
2389         __le32  patch_version;
2390         __le32  ram_version;
2391         __le32  ref_clock;
2392         __u8    reserved[4];
2393 } __packed;
2394 
2395 struct qca_rampatch_version {
2396         __le16  rom_version;
2397         __le16  patch_version;
2398 } __packed;
2399 
2400 struct qca_device_info {
2401         u32     rom_version;
2402         u8      rampatch_hdr;   /* length of header in rampatch */
2403         u8      nvm_hdr;        /* length of header in NVM */
2404         u8      ver_offset;     /* offset of version structure in rampatch */
2405 };
2406 
2407 static const struct qca_device_info qca_devices_table[] = {
2408         { 0x00000100, 20, 4, 10 }, /* Rome 1.0 */
2409         { 0x00000101, 20, 4, 10 }, /* Rome 1.1 */
2410         { 0x00000200, 28, 4, 18 }, /* Rome 2.0 */
2411         { 0x00000201, 28, 4, 18 }, /* Rome 2.1 */
2412         { 0x00000300, 28, 4, 18 }, /* Rome 3.0 */
2413         { 0x00000302, 28, 4, 18 }, /* Rome 3.2 */
2414 };
2415 
2416 static int btusb_qca_send_vendor_req(struct hci_dev *hdev, u8 request,
2417                                      void *data, u16 size)
2418 {
2419         struct btusb_data *btdata = hci_get_drvdata(hdev);
2420         struct usb_device *udev = btdata->udev;
2421         int pipe, err;
2422         u8 *buf;
2423 
2424         buf = kmalloc(size, GFP_KERNEL);
2425         if (!buf)
2426                 return -ENOMEM;
2427 
2428         /* Found some of USB hosts have IOT issues with ours so that we should
2429          * not wait until HCI layer is ready.
2430          */
2431         pipe = usb_rcvctrlpipe(udev, 0);
2432         err = usb_control_msg(udev, pipe, request, USB_TYPE_VENDOR | USB_DIR_IN,
2433                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2434         if (err < 0) {
2435                 BT_ERR("%s: Failed to access otp area (%d)", hdev->name, err);
2436                 goto done;
2437         }
2438 
2439         memcpy(data, buf, size);
2440 
2441 done:
2442         kfree(buf);
2443 
2444         return err;
2445 }
2446 
2447 static int btusb_setup_qca_download_fw(struct hci_dev *hdev,
2448                                        const struct firmware *firmware,
2449                                        size_t hdr_size)
2450 {
2451         struct btusb_data *btdata = hci_get_drvdata(hdev);
2452         struct usb_device *udev = btdata->udev;
2453         size_t count, size, sent = 0;
2454         int pipe, len, err;
2455         u8 *buf;
2456 
2457         buf = kmalloc(QCA_DFU_PACKET_LEN, GFP_KERNEL);
2458         if (!buf)
2459                 return -ENOMEM;
2460 
2461         count = firmware->size;
2462 
2463         size = min_t(size_t, count, hdr_size);
2464         memcpy(buf, firmware->data, size);
2465 
2466         /* USB patches should go down to controller through USB path
2467          * because binary format fits to go down through USB channel.
2468          * USB control path is for patching headers and USB bulk is for
2469          * patch body.
2470          */
2471         pipe = usb_sndctrlpipe(udev, 0);
2472         err = usb_control_msg(udev, pipe, QCA_DFU_DOWNLOAD, USB_TYPE_VENDOR,
2473                               0, 0, buf, size, USB_CTRL_SET_TIMEOUT);
2474         if (err < 0) {
2475                 BT_ERR("%s: Failed to send headers (%d)", hdev->name, err);
2476                 goto done;
2477         }
2478 
2479         sent += size;
2480         count -= size;
2481 
2482         while (count) {
2483                 size = min_t(size_t, count, QCA_DFU_PACKET_LEN);
2484 
2485                 memcpy(buf, firmware->data + sent, size);
2486 
2487                 pipe = usb_sndbulkpipe(udev, 0x02);
2488                 err = usb_bulk_msg(udev, pipe, buf, size, &len,
2489                                    QCA_DFU_TIMEOUT);
2490                 if (err < 0) {
2491                         BT_ERR("%s: Failed to send body at %zd of %zd (%d)",
2492                                hdev->name, sent, firmware->size, err);
2493                         break;
2494                 }
2495 
2496                 if (size != len) {
2497                         BT_ERR("%s: Failed to get bulk buffer", hdev->name);
2498                         err = -EILSEQ;
2499                         break;
2500                 }
2501 
2502                 sent  += size;
2503                 count -= size;
2504         }
2505 
2506 done:
2507         kfree(buf);
2508         return err;
2509 }
2510 
2511 static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
2512                                          struct qca_version *ver,
2513                                          const struct qca_device_info *info)
2514 {
2515         struct qca_rampatch_version *rver;
2516         const struct firmware *fw;
2517         u32 ver_rom, ver_patch;
2518         u16 rver_rom, rver_patch;
2519         char fwname[64];
2520         int err;
2521 
2522         ver_rom = le32_to_cpu(ver->rom_version);
2523         ver_patch = le32_to_cpu(ver->patch_version);
2524 
2525         snprintf(fwname, sizeof(fwname), "qca/rampatch_usb_%08x.bin", ver_rom);
2526 
2527         err = request_firmware(&fw, fwname, &hdev->dev);
2528         if (err) {
2529                 BT_ERR("%s: failed to request rampatch file: %s (%d)",
2530                        hdev->name, fwname, err);
2531                 return err;
2532         }
2533 
2534         BT_INFO("%s: using rampatch file: %s", hdev->name, fwname);
2535 
2536         rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
2537         rver_rom = le16_to_cpu(rver->rom_version);
2538         rver_patch = le16_to_cpu(rver->patch_version);
2539 
2540         BT_INFO("%s: QCA: patch rome 0x%x build 0x%x, firmware rome 0x%x "
2541                 "build 0x%x", hdev->name, rver_rom, rver_patch, ver_rom,
2542                 ver_patch);
2543 
2544         if (rver_rom != ver_rom || rver_patch <= ver_patch) {
2545                 BT_ERR("%s: rampatch file version did not match with firmware",
2546                        hdev->name);
2547                 err = -EINVAL;
2548                 goto done;
2549         }
2550 
2551         err = btusb_setup_qca_download_fw(hdev, fw, info->rampatch_hdr);
2552 
2553 done:
2554         release_firmware(fw);
2555 
2556         return err;
2557 }
2558 
2559 static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
2560                                     struct qca_version *ver,
2561                                     const struct qca_device_info *info)
2562 {
2563         const struct firmware *fw;
2564         char fwname[64];
2565         int err;
2566 
2567         snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
2568                  le32_to_cpu(ver->rom_version));
2569 
2570         err = request_firmware(&fw, fwname, &hdev->dev);
2571         if (err) {
2572                 BT_ERR("%s: failed to request NVM file: %s (%d)",
2573                        hdev->name, fwname, err);
2574                 return err;
2575         }
2576 
2577         BT_INFO("%s: using NVM file: %s", hdev->name, fwname);
2578 
2579         err = btusb_setup_qca_download_fw(hdev, fw, info->nvm_hdr);
2580 
2581         release_firmware(fw);
2582 
2583         return err;
2584 }
2585 
2586 static int btusb_setup_qca(struct hci_dev *hdev)
2587 {
2588         const struct qca_device_info *info = NULL;
2589         struct qca_version ver;
2590         u32 ver_rom;
2591         u8 status;
2592         int i, err;
2593 
2594         err = btusb_qca_send_vendor_req(hdev, QCA_GET_TARGET_VERSION, &ver,
2595                                         sizeof(ver));
2596         if (err < 0)
2597                 return err;
2598 
2599         ver_rom = le32_to_cpu(ver.rom_version);
2600         for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
2601                 if (ver_rom == qca_devices_table[i].rom_version)
2602                         info = &qca_devices_table[i];
2603         }
2604         if (!info) {
2605                 BT_ERR("%s: don't support firmware rome 0x%x", hdev->name,
2606                        ver_rom);
2607                 return -ENODEV;
2608         }
2609 
2610         err = btusb_qca_send_vendor_req(hdev, QCA_CHECK_STATUS, &status,
2611                                         sizeof(status));
2612         if (err < 0)
2613                 return err;
2614 
2615         if (!(status & QCA_PATCH_UPDATED)) {
2616                 err = btusb_setup_qca_load_rampatch(hdev, &ver, info);
2617                 if (err < 0)
2618                         return err;
2619         }
2620 
2621         if (!(status & QCA_SYSCFG_UPDATED)) {
2622                 err = btusb_setup_qca_load_nvm(hdev, &ver, info);
2623                 if (err < 0)
2624                         return err;
2625         }
2626 
2627         return 0;
2628 }
2629 
2630 #ifdef CONFIG_BT_HCIBTUSB_BCM
2631 static inline int __set_diag_interface(struct hci_dev *hdev)
2632 {
2633         struct btusb_data *data = hci_get_drvdata(hdev);
2634         struct usb_interface *intf = data->diag;
2635         int i;
2636 
2637         if (!data->diag)
2638                 return -ENODEV;
2639 
2640         data->diag_tx_ep = NULL;
2641         data->diag_rx_ep = NULL;
2642 
2643         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2644                 struct usb_endpoint_descriptor *ep_desc;
2645 
2646                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2647 
2648                 if (!data->diag_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2649                         data->diag_tx_ep = ep_desc;
2650                         continue;
2651                 }
2652 
2653                 if (!data->diag_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2654                         data->diag_rx_ep = ep_desc;
2655                         continue;
2656                 }
2657         }
2658 
2659         if (!data->diag_tx_ep || !data->diag_rx_ep) {
2660                 BT_ERR("%s invalid diagnostic descriptors", hdev->name);
2661                 return -ENODEV;
2662         }
2663 
2664         return 0;
2665 }
2666 
2667 static struct urb *alloc_diag_urb(struct hci_dev *hdev, bool enable)
2668 {
2669         struct btusb_data *data = hci_get_drvdata(hdev);
2670         struct sk_buff *skb;
2671         struct urb *urb;
2672         unsigned int pipe;
2673 
2674         if (!data->diag_tx_ep)
2675                 return ERR_PTR(-ENODEV);
2676 
2677         urb = usb_alloc_urb(0, GFP_KERNEL);
2678         if (!urb)
2679                 return ERR_PTR(-ENOMEM);
2680 
2681         skb = bt_skb_alloc(2, GFP_KERNEL);
2682         if (!skb) {
2683                 usb_free_urb(urb);
2684                 return ERR_PTR(-ENOMEM);
2685         }
2686 
2687         *skb_put(skb, 1) = 0xf0;
2688         *skb_put(skb, 1) = enable;
2689 
2690         pipe = usb_sndbulkpipe(data->udev, data->diag_tx_ep->bEndpointAddress);
2691 
2692         usb_fill_bulk_urb(urb, data->udev, pipe,
2693                           skb->data, skb->len, btusb_tx_complete, skb);
2694 
2695         skb->dev = (void *)hdev;
2696 
2697         return urb;
2698 }
2699 
2700 static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
2701 {
2702         struct btusb_data *data = hci_get_drvdata(hdev);
2703         struct urb *urb;
2704 
2705         if (!data->diag)
2706                 return -ENODEV;
2707 
2708         if (!test_bit(HCI_RUNNING, &hdev->flags))
2709                 return -ENETDOWN;
2710 
2711         urb = alloc_diag_urb(hdev, enable);
2712         if (IS_ERR(urb))
2713                 return PTR_ERR(urb);
2714 
2715         return submit_or_queue_tx_urb(hdev, urb);
2716 }
2717 #endif
2718 
2719 static int btusb_probe(struct usb_interface *intf,
2720                        const struct usb_device_id *id)
2721 {
2722         struct usb_endpoint_descriptor *ep_desc;
2723         struct btusb_data *data;
2724         struct hci_dev *hdev;
2725         unsigned ifnum_base;
2726         int i, err;
2727 
2728         BT_DBG("intf %p id %p", intf, id);
2729 
2730         /* interface numbers are hardcoded in the spec */
2731         if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
2732                 if (!(id->driver_info & BTUSB_IFNUM_2))
2733                         return -ENODEV;
2734                 if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
2735                         return -ENODEV;
2736         }
2737 
2738         ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;
2739 
2740         if (!id->driver_info) {
2741                 const struct usb_device_id *match;
2742 
2743                 match = usb_match_id(intf, blacklist_table);
2744                 if (match)
2745                         id = match;
2746         }
2747 
2748         if (id->driver_info == BTUSB_IGNORE)
2749                 return -ENODEV;
2750 
2751         if (id->driver_info & BTUSB_ATH3012) {
2752                 struct usb_device *udev = interface_to_usbdev(intf);
2753 
2754                 /* Old firmware would otherwise let ath3k driver load
2755                  * patch and sysconfig files */
2756                 if (le16_to_cpu(udev->descriptor.bcdDevice) <= 0x0001)
2757                         return -ENODEV;
2758         }
2759 
2760         data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
2761         if (!data)
2762                 return -ENOMEM;
2763 
2764         for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
2765                 ep_desc = &intf->cur_altsetting->endpoint[i].desc;
2766 
2767                 if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
2768                         data->intr_ep = ep_desc;
2769                         continue;
2770                 }
2771 
2772                 if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
2773                         data->bulk_tx_ep = ep_desc;
2774                         continue;
2775                 }
2776 
2777                 if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
2778                         data->bulk_rx_ep = ep_desc;
2779                         continue;
2780                 }
2781         }
2782 
2783         if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep)
2784                 return -ENODEV;
2785 
2786         if (id->driver_info & BTUSB_AMP) {
2787                 data->cmdreq_type = USB_TYPE_CLASS | 0x01;
2788                 data->cmdreq = 0x2b;
2789         } else {
2790                 data->cmdreq_type = USB_TYPE_CLASS;
2791                 data->cmdreq = 0x00;
2792         }
2793 
2794         data->udev = interface_to_usbdev(intf);
2795         data->intf = intf;
2796 
2797         INIT_WORK(&data->work, btusb_work);
2798         INIT_WORK(&data->waker, btusb_waker);
2799         init_usb_anchor(&data->deferred);
2800         init_usb_anchor(&data->tx_anchor);
2801         spin_lock_init(&data->txlock);
2802 
2803         init_usb_anchor(&data->intr_anchor);
2804         init_usb_anchor(&data->bulk_anchor);
2805         init_usb_anchor(&data->isoc_anchor);
2806         init_usb_anchor(&data->diag_anchor);
2807         spin_lock_init(&data->rxlock);
2808 
2809         if (id->driver_info & BTUSB_INTEL_NEW) {
2810                 data->recv_event = btusb_recv_event_intel;
2811                 data->recv_bulk = btusb_recv_bulk_intel;
2812                 set_bit(BTUSB_BOOTLOADER, &data->flags);
2813         } else {
2814                 data->recv_event = hci_recv_frame;
2815                 data->recv_bulk = btusb_recv_bulk;
2816         }
2817 
2818         hdev = hci_alloc_dev();
2819         if (!hdev)
2820                 return -ENOMEM;
2821 
2822         hdev->bus = HCI_USB;
2823         hci_set_drvdata(hdev, data);
2824 
2825         if (id->driver_info & BTUSB_AMP)
2826                 hdev->dev_type = HCI_AMP;
2827         else
2828                 hdev->dev_type = HCI_BREDR;
2829 
2830         data->hdev = hdev;
2831 
2832         SET_HCIDEV_DEV(hdev, &intf->dev);
2833 
2834         hdev->open   = btusb_open;
2835         hdev->close  = btusb_close;
2836         hdev->flush  = btusb_flush;
2837         hdev->send   = btusb_send_frame;
2838         hdev->notify = btusb_notify;
2839 
2840         if (id->driver_info & BTUSB_BCM2045)
2841                 set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
2842 
2843         if (id->driver_info & BTUSB_BCM92035)
2844                 hdev->setup = btusb_setup_bcm92035;
2845 
2846 #ifdef CONFIG_BT_HCIBTUSB_BCM
2847         if (id->driver_info & BTUSB_BCM_PATCHRAM) {
2848                 hdev->manufacturer = 15;
2849                 hdev->setup = btbcm_setup_patchram;
2850                 hdev->set_diag = btusb_bcm_set_diag;
2851                 hdev->set_bdaddr = btbcm_set_bdaddr;
2852 
2853                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2854                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2855         }
2856 
2857         if (id->driver_info & BTUSB_BCM_APPLE) {
2858                 hdev->manufacturer = 15;
2859                 hdev->setup = btbcm_setup_apple;
2860                 hdev->set_diag = btusb_bcm_set_diag;
2861 
2862                 /* Broadcom LM_DIAG Interface numbers are hardcoded */
2863                 data->diag = usb_ifnum_to_if(data->udev, ifnum_base + 2);
2864         }
2865 #endif
2866 
2867         if (id->driver_info & BTUSB_INTEL) {
2868                 hdev->manufacturer = 2;
2869                 hdev->setup = btusb_setup_intel;
2870                 hdev->shutdown = btusb_shutdown_intel;
2871                 hdev->set_diag = btintel_set_diag_mfg;
2872                 hdev->set_bdaddr = btintel_set_bdaddr;
2873                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2874                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2875                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2876         }
2877 
2878         if (id->driver_info & BTUSB_INTEL_NEW) {
2879                 hdev->manufacturer = 2;
2880                 hdev->send = btusb_send_frame_intel;
2881                 hdev->setup = btusb_setup_intel_new;
2882                 hdev->hw_error = btintel_hw_error;
2883                 hdev->set_diag = btintel_set_diag;
2884                 hdev->set_bdaddr = btintel_set_bdaddr;
2885                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2886                 set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
2887         }
2888 
2889         if (id->driver_info & BTUSB_MARVELL)
2890                 hdev->set_bdaddr = btusb_set_bdaddr_marvell;
2891 
2892         if (id->driver_info & BTUSB_SWAVE) {
2893                 set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);
2894                 set_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks);
2895         }
2896 
2897         if (id->driver_info & BTUSB_INTEL_BOOT) {
2898                 hdev->manufacturer = 2;
2899                 set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2900         }
2901 
2902         if (id->driver_info & BTUSB_ATH3012) {
2903                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2904                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2905                 set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
2906         }
2907 
2908         if (id->driver_info & BTUSB_QCA_ROME) {
2909                 data->setup_on_usb = btusb_setup_qca;
2910                 hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
2911         }
2912 
2913 #ifdef CONFIG_BT_HCIBTUSB_RTL
2914         if (id->driver_info & BTUSB_REALTEK) {
2915                 hdev->setup = btrtl_setup_realtek;
2916 
2917                 /* Realtek devices lose their updated firmware over suspend,
2918                  * but the USB hub doesn't notice any status change.
2919                  * Explicitly request a device reset on resume.
2920                  */
2921                 set_bit(BTUSB_RESET_RESUME, &data->flags);
2922         }
2923 #endif
2924 
2925         if (id->driver_info & BTUSB_AMP) {
2926                 /* AMP controllers do not support SCO packets */
2927                 data->isoc = NULL;
2928         } else {
2929                 /* Interface orders are hardcoded in the specification */
2930                 data->isoc = usb_ifnum_to_if(data->udev, ifnum_base + 1);
2931         }
2932 
2933         if (!reset)
2934                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2935 
2936         if (force_scofix || id->driver_info & BTUSB_WRONG_SCO_MTU) {
2937                 if (!disable_scofix)
2938                         set_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks);
2939         }
2940 
2941         if (id->driver_info & BTUSB_BROKEN_ISOC)
2942                 data->isoc = NULL;
2943 
2944         if (id->driver_info & BTUSB_DIGIANSWER) {
2945                 data->cmdreq_type = USB_TYPE_VENDOR;
2946                 set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2947         }
2948 
2949         if (id->driver_info & BTUSB_CSR) {
2950                 struct usb_device *udev = data->udev;
2951                 u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
2952 
2953                 /* Old firmware would otherwise execute USB reset */
2954                 if (bcdDevice < 0x117)
2955                         set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks);
2956 
2957                 /* Fake CSR devices with broken commands */
2958                 if (bcdDevice <= 0x100 || bcdDevice == 0x134)
2959                         hdev->setup = btusb_setup_csr;
2960 
2961                 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
2962         }
2963 
2964         if (id->driver_info & BTUSB_SNIFFER) {
2965                 struct usb_device *udev = data->udev;
2966 
2967                 /* New sniffer firmware has crippled HCI interface */
2968                 if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x997)
2969                         set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks);
2970         }
2971 
2972         if (id->driver_info & BTUSB_INTEL_BOOT) {
2973                 /* A bug in the bootloader causes that interrupt interface is
2974                  * only enabled after receiving SetInterface(0, AltSetting=0).
2975                  */
2976                 err = usb_set_interface(data->udev, 0, 0);
2977                 if (err < 0) {
2978                         BT_ERR("failed to set interface 0, alt 0 %d", err);
2979                         hci_free_dev(hdev);
2980                         return err;
2981                 }
2982         }
2983 
2984         if (data->isoc) {
2985                 err = usb_driver_claim_interface(&btusb_driver,
2986                                                  data->isoc, data);
2987                 if (err < 0) {
2988                         hci_free_dev(hdev);
2989                         return err;
2990                 }
2991         }
2992 
2993 #ifdef CONFIG_BT_HCIBTUSB_BCM
2994         if (data->diag) {
2995                 if (!usb_driver_claim_interface(&btusb_driver,
2996                                                 data->diag, data))
2997                         __set_diag_interface(hdev);
2998                 else
2999                         data->diag = NULL;
3000         }
3001 #endif
3002 
3003         err = hci_register_dev(hdev);
3004         if (err < 0) {
3005                 hci_free_dev(hdev);
3006                 return err;
3007         }
3008 
3009         usb_set_intfdata(intf, data);
3010 
3011         return 0;
3012 }
3013 
3014 static void btusb_disconnect(struct usb_interface *intf)
3015 {
3016         struct btusb_data *data = usb_get_intfdata(intf);
3017         struct hci_dev *hdev;
3018 
3019         BT_DBG("intf %p", intf);
3020 
3021         if (!data)
3022                 return;
3023 
3024         hdev = data->hdev;
3025         usb_set_intfdata(data->intf, NULL);
3026 
3027         if (data->isoc)
3028                 usb_set_intfdata(data->isoc, NULL);
3029 
3030         if (data->diag)
3031                 usb_set_intfdata(data->diag, NULL);
3032 
3033         hci_unregister_dev(hdev);
3034 
3035         if (intf == data->intf) {
3036                 if (data->isoc)
3037                         usb_driver_release_interface(&btusb_driver, data->isoc);
3038                 if (data->diag)
3039                         usb_driver_release_interface(&btusb_driver, data->diag);
3040         } else if (intf == data->isoc) {
3041                 if (data->diag)
3042                         usb_driver_release_interface(&btusb_driver, data->diag);
3043                 usb_driver_release_interface(&btusb_driver, data->intf);
3044         } else if (intf == data->diag) {
3045                 usb_driver_release_interface(&btusb_driver, data->intf);
3046                 if (data->isoc)
3047                         usb_driver_release_interface(&btusb_driver, data->isoc);
3048         }
3049 
3050         hci_free_dev(hdev);
3051 }
3052 
3053 #ifdef CONFIG_PM
3054 static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
3055 {
3056         struct btusb_data *data = usb_get_intfdata(intf);
3057 
3058         BT_DBG("intf %p", intf);
3059 
3060         if (data->suspend_count++)
3061                 return 0;
3062 
3063         spin_lock_irq(&data->txlock);
3064         if (!(PMSG_IS_AUTO(message) && data->tx_in_flight)) {
3065                 set_bit(BTUSB_SUSPENDING, &data->flags);
3066                 spin_unlock_irq(&data->txlock);
3067         } else {
3068                 spin_unlock_irq(&data->txlock);
3069                 data->suspend_count--;
3070                 return -EBUSY;
3071         }
3072 
3073         cancel_work_sync(&data->work);
3074 
3075         btusb_stop_traffic(data);
3076         usb_kill_anchored_urbs(&data->tx_anchor);
3077 
3078         /* Optionally request a device reset on resume, but only when
3079          * wakeups are disabled. If wakeups are enabled we assume the
3080          * device will stay powered up throughout suspend.
3081          */
3082         if (test_bit(BTUSB_RESET_RESUME, &data->flags) &&
3083             !device_may_wakeup(&data->udev->dev))
3084                 data->udev->reset_resume = 1;
3085 
3086         return 0;
3087 }
3088 
3089 static void play_deferred(struct btusb_data *data)
3090 {
3091         struct urb *urb;
3092         int err;
3093 
3094         while ((urb = usb_get_from_anchor(&data->deferred))) {
3095                 err = usb_submit_urb(urb, GFP_ATOMIC);
3096                 if (err < 0)
3097                         break;
3098 
3099                 data->tx_in_flight++;
3100         }
3101         usb_scuttle_anchored_urbs(&data->deferred);
3102 }
3103 
3104 static int btusb_resume(struct usb_interface *intf)
3105 {
3106         struct btusb_data *data = usb_get_intfdata(intf);
3107         struct hci_dev *hdev = data->hdev;
3108         int err = 0;
3109 
3110         BT_DBG("intf %p", intf);
3111 
3112         if (--data->suspend_count)
3113                 return 0;
3114 
3115         if (!test_bit(HCI_RUNNING, &hdev->flags))
3116                 goto done;
3117 
3118         if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
3119                 err = btusb_submit_intr_urb(hdev, GFP_NOIO);
3120                 if (err < 0) {
3121                         clear_bit(BTUSB_INTR_RUNNING, &data->flags);
3122                         goto failed;
3123                 }
3124         }
3125 
3126         if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
3127                 err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
3128                 if (err < 0) {
3129                         clear_bit(BTUSB_BULK_RUNNING, &data->flags);
3130                         goto failed;
3131                 }
3132 
3133                 btusb_submit_bulk_urb(hdev, GFP_NOIO);
3134         }
3135 
3136         if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
3137                 if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
3138                         clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
3139                 else
3140                         btusb_submit_isoc_urb(hdev, GFP_NOIO);
3141         }
3142 
3143         spin_lock_irq(&data->txlock);
3144         play_deferred(data);
3145         clear_bit(BTUSB_SUSPENDING, &data->flags);
3146         spin_unlock_irq(&data->txlock);
3147         schedule_work(&data->work);
3148 
3149         return 0;
3150 
3151 failed:
3152         usb_scuttle_anchored_urbs(&data->deferred);
3153 done:
3154         spin_lock_irq(&data->txlock);
3155         clear_bit(BTUSB_SUSPENDING, &data->flags);
3156         spin_unlock_irq(&data->txlock);
3157 
3158         return err;
3159 }
3160 #endif
3161 
3162 static struct usb_driver btusb_driver = {
3163         .name           = "btusb",
3164         .probe          = btusb_probe,
3165         .disconnect     = btusb_disconnect,
3166 #ifdef CONFIG_PM
3167         .suspend        = btusb_suspend,
3168         .resume         = btusb_resume,
3169 #endif
3170         .id_table       = btusb_table,
3171         .supports_autosuspend = 1,
3172         .disable_hub_initiated_lpm = 1,
3173 };
3174 
3175 module_usb_driver(btusb_driver);
3176 
3177 module_param(disable_scofix, bool, 0644);
3178 MODULE_PARM_DESC(disable_scofix, "Disable fixup of wrong SCO buffer size");
3179 
3180 module_param(force_scofix, bool, 0644);
3181 MODULE_PARM_DESC(force_scofix, "Force fixup of wrong SCO buffers size");
3182 
3183 module_param(reset, bool, 0644);
3184 MODULE_PARM_DESC(reset, "Send HCI reset command on initialization");
3185 
3186 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
3187 MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
3188 MODULE_VERSION(VERSION);
3189 MODULE_LICENSE("GPL");
3190 

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