Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5

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

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