xref: /openbmc/linux/drivers/bluetooth/ath3k.c (revision b830f94f)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (c) 2008-2009 Atheros Communications Inc.
4  */
5 
6 
7 #include <linux/module.h>
8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/slab.h>
11 #include <linux/types.h>
12 #include <linux/errno.h>
13 #include <linux/device.h>
14 #include <linux/firmware.h>
15 #include <linux/usb.h>
16 #include <asm/unaligned.h>
17 #include <net/bluetooth/bluetooth.h>
18 
19 #define VERSION "1.0"
20 #define ATH3K_FIRMWARE	"ath3k-1.fw"
21 
22 #define ATH3K_DNLOAD				0x01
23 #define ATH3K_GETSTATE				0x05
24 #define ATH3K_SET_NORMAL_MODE			0x07
25 #define ATH3K_GETVERSION			0x09
26 #define USB_REG_SWITCH_VID_PID			0x0a
27 
28 #define ATH3K_MODE_MASK				0x3F
29 #define ATH3K_NORMAL_MODE			0x0E
30 
31 #define ATH3K_PATCH_UPDATE			0x80
32 #define ATH3K_SYSCFG_UPDATE			0x40
33 
34 #define ATH3K_XTAL_FREQ_26M			0x00
35 #define ATH3K_XTAL_FREQ_40M			0x01
36 #define ATH3K_XTAL_FREQ_19P2			0x02
37 #define ATH3K_NAME_LEN				0xFF
38 
39 struct ath3k_version {
40 	__le32	rom_version;
41 	__le32	build_version;
42 	__le32	ram_version;
43 	__u8	ref_clock;
44 	__u8	reserved[7];
45 } __packed;
46 
47 static const struct usb_device_id ath3k_table[] = {
48 	/* Atheros AR3011 */
49 	{ USB_DEVICE(0x0CF3, 0x3000) },
50 
51 	/* Atheros AR3011 with sflash firmware*/
52 	{ USB_DEVICE(0x0489, 0xE027) },
53 	{ USB_DEVICE(0x0489, 0xE03D) },
54 	{ USB_DEVICE(0x04F2, 0xAFF1) },
55 	{ USB_DEVICE(0x0930, 0x0215) },
56 	{ USB_DEVICE(0x0CF3, 0x3002) },
57 	{ USB_DEVICE(0x0CF3, 0xE019) },
58 	{ USB_DEVICE(0x13d3, 0x3304) },
59 
60 	/* Atheros AR9285 Malbec with sflash firmware */
61 	{ USB_DEVICE(0x03F0, 0x311D) },
62 
63 	/* Atheros AR3012 with sflash firmware*/
64 	{ USB_DEVICE(0x0489, 0xe04d) },
65 	{ USB_DEVICE(0x0489, 0xe04e) },
66 	{ USB_DEVICE(0x0489, 0xe057) },
67 	{ USB_DEVICE(0x0489, 0xe056) },
68 	{ USB_DEVICE(0x0489, 0xe05f) },
69 	{ USB_DEVICE(0x0489, 0xe076) },
70 	{ USB_DEVICE(0x0489, 0xe078) },
71 	{ USB_DEVICE(0x0489, 0xe095) },
72 	{ USB_DEVICE(0x04c5, 0x1330) },
73 	{ USB_DEVICE(0x04CA, 0x3004) },
74 	{ USB_DEVICE(0x04CA, 0x3005) },
75 	{ USB_DEVICE(0x04CA, 0x3006) },
76 	{ USB_DEVICE(0x04CA, 0x3007) },
77 	{ USB_DEVICE(0x04CA, 0x3008) },
78 	{ USB_DEVICE(0x04CA, 0x300b) },
79 	{ USB_DEVICE(0x04CA, 0x300d) },
80 	{ USB_DEVICE(0x04CA, 0x300f) },
81 	{ USB_DEVICE(0x04CA, 0x3010) },
82 	{ USB_DEVICE(0x04CA, 0x3014) },
83 	{ USB_DEVICE(0x04CA, 0x3018) },
84 	{ USB_DEVICE(0x0930, 0x0219) },
85 	{ USB_DEVICE(0x0930, 0x021c) },
86 	{ USB_DEVICE(0x0930, 0x0220) },
87 	{ USB_DEVICE(0x0930, 0x0227) },
88 	{ USB_DEVICE(0x0b05, 0x17d0) },
89 	{ USB_DEVICE(0x0CF3, 0x0036) },
90 	{ USB_DEVICE(0x0CF3, 0x3004) },
91 	{ USB_DEVICE(0x0CF3, 0x3008) },
92 	{ USB_DEVICE(0x0CF3, 0x311D) },
93 	{ USB_DEVICE(0x0CF3, 0x311E) },
94 	{ USB_DEVICE(0x0CF3, 0x311F) },
95 	{ USB_DEVICE(0x0cf3, 0x3121) },
96 	{ USB_DEVICE(0x0CF3, 0x817a) },
97 	{ USB_DEVICE(0x0CF3, 0x817b) },
98 	{ USB_DEVICE(0x0cf3, 0xe003) },
99 	{ USB_DEVICE(0x0CF3, 0xE004) },
100 	{ USB_DEVICE(0x0CF3, 0xE005) },
101 	{ USB_DEVICE(0x0CF3, 0xE006) },
102 	{ USB_DEVICE(0x13d3, 0x3362) },
103 	{ USB_DEVICE(0x13d3, 0x3375) },
104 	{ USB_DEVICE(0x13d3, 0x3393) },
105 	{ USB_DEVICE(0x13d3, 0x3395) },
106 	{ USB_DEVICE(0x13d3, 0x3402) },
107 	{ USB_DEVICE(0x13d3, 0x3408) },
108 	{ USB_DEVICE(0x13d3, 0x3423) },
109 	{ USB_DEVICE(0x13d3, 0x3432) },
110 	{ USB_DEVICE(0x13d3, 0x3472) },
111 	{ USB_DEVICE(0x13d3, 0x3474) },
112 	{ USB_DEVICE(0x13d3, 0x3487) },
113 	{ USB_DEVICE(0x13d3, 0x3490) },
114 
115 	/* Atheros AR5BBU12 with sflash firmware */
116 	{ USB_DEVICE(0x0489, 0xE02C) },
117 
118 	/* Atheros AR5BBU22 with sflash firmware */
119 	{ USB_DEVICE(0x0489, 0xE036) },
120 	{ USB_DEVICE(0x0489, 0xE03C) },
121 
122 	{ }	/* Terminating entry */
123 };
124 
125 MODULE_DEVICE_TABLE(usb, ath3k_table);
126 
127 #define BTUSB_ATH3012		0x80
128 /* This table is to load patch and sysconfig files
129  * for AR3012
130  */
131 static const struct usb_device_id ath3k_blist_tbl[] = {
132 
133 	/* Atheros AR3012 with sflash firmware*/
134 	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
135 	{ USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
136 	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
137 	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
138 	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
139 	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
140 	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
141 	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
142 	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
143 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
144 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
145 	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
146 	{ USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
147 	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
148 	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
149 	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
150 	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
151 	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
152 	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
153 	{ USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
154 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
155 	{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
156 	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
157 	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
158 	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
159 	{ USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
160 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
161 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
162 	{ USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
163 	{ USB_DEVICE(0x0cf3, 0x311E), .driver_info = BTUSB_ATH3012 },
164 	{ USB_DEVICE(0x0cf3, 0x311F), .driver_info = BTUSB_ATH3012 },
165 	{ USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
166 	{ USB_DEVICE(0x0CF3, 0x817a), .driver_info = BTUSB_ATH3012 },
167 	{ USB_DEVICE(0x0CF3, 0x817b), .driver_info = BTUSB_ATH3012 },
168 	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
169 	{ USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
170 	{ USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
171 	{ USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
172 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
173 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
174 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
175 	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
176 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
177 	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
178 	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
179 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
180 	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
181 	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
182 	{ USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
183 	{ USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
184 
185 	/* Atheros AR5BBU22 with sflash firmware */
186 	{ USB_DEVICE(0x0489, 0xE036), .driver_info = BTUSB_ATH3012 },
187 	{ USB_DEVICE(0x0489, 0xE03C), .driver_info = BTUSB_ATH3012 },
188 
189 	{ }	/* Terminating entry */
190 };
191 
192 static inline void ath3k_log_failed_loading(int err, int len, int size,
193 					    int count)
194 {
195 	BT_ERR("Firmware loading err = %d, len = %d, size = %d, count = %d",
196 	       err, len, size, count);
197 }
198 
199 #define USB_REQ_DFU_DNLOAD	1
200 #define BULK_SIZE		4096
201 #define FW_HDR_SIZE		20
202 #define TIMEGAP_USEC_MIN	50
203 #define TIMEGAP_USEC_MAX	100
204 
205 static int ath3k_load_firmware(struct usb_device *udev,
206 				const struct firmware *firmware)
207 {
208 	u8 *send_buf;
209 	int len = 0;
210 	int err, pipe, size, sent = 0;
211 	int count = firmware->size;
212 
213 	BT_DBG("udev %p", udev);
214 
215 	pipe = usb_sndctrlpipe(udev, 0);
216 
217 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
218 	if (!send_buf) {
219 		BT_ERR("Can't allocate memory chunk for firmware");
220 		return -ENOMEM;
221 	}
222 
223 	memcpy(send_buf, firmware->data, FW_HDR_SIZE);
224 	err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
225 			      0, 0, send_buf, FW_HDR_SIZE,
226 			      USB_CTRL_SET_TIMEOUT);
227 	if (err < 0) {
228 		BT_ERR("Can't change to loading configuration err");
229 		goto error;
230 	}
231 	sent += FW_HDR_SIZE;
232 	count -= FW_HDR_SIZE;
233 
234 	pipe = usb_sndbulkpipe(udev, 0x02);
235 
236 	while (count) {
237 		/* workaround the compatibility issue with xHCI controller*/
238 		usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
239 
240 		size = min_t(uint, count, BULK_SIZE);
241 		memcpy(send_buf, firmware->data + sent, size);
242 
243 		err = usb_bulk_msg(udev, pipe, send_buf, size,
244 					&len, 3000);
245 
246 		if (err || (len != size)) {
247 			ath3k_log_failed_loading(err, len, size, count);
248 			goto error;
249 		}
250 
251 		sent  += size;
252 		count -= size;
253 	}
254 
255 error:
256 	kfree(send_buf);
257 	return err;
258 }
259 
260 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
261 {
262 	int ret, pipe = 0;
263 	char *buf;
264 
265 	buf = kmalloc(sizeof(*buf), GFP_KERNEL);
266 	if (!buf)
267 		return -ENOMEM;
268 
269 	pipe = usb_rcvctrlpipe(udev, 0);
270 	ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE,
271 			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
272 			      buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT);
273 
274 	*state = *buf;
275 	kfree(buf);
276 
277 	return ret;
278 }
279 
280 static int ath3k_get_version(struct usb_device *udev,
281 			struct ath3k_version *version)
282 {
283 	int ret, pipe = 0;
284 	struct ath3k_version *buf;
285 	const int size = sizeof(*buf);
286 
287 	buf = kmalloc(size, GFP_KERNEL);
288 	if (!buf)
289 		return -ENOMEM;
290 
291 	pipe = usb_rcvctrlpipe(udev, 0);
292 	ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION,
293 			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
294 			      buf, size, USB_CTRL_SET_TIMEOUT);
295 
296 	memcpy(version, buf, size);
297 	kfree(buf);
298 
299 	return ret;
300 }
301 
302 static int ath3k_load_fwfile(struct usb_device *udev,
303 		const struct firmware *firmware)
304 {
305 	u8 *send_buf;
306 	int len = 0;
307 	int err, pipe, size, count, sent = 0;
308 	int ret;
309 
310 	count = firmware->size;
311 
312 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
313 	if (!send_buf) {
314 		BT_ERR("Can't allocate memory chunk for firmware");
315 		return -ENOMEM;
316 	}
317 
318 	size = min_t(uint, count, FW_HDR_SIZE);
319 	memcpy(send_buf, firmware->data, size);
320 
321 	pipe = usb_sndctrlpipe(udev, 0);
322 	ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
323 			USB_TYPE_VENDOR, 0, 0, send_buf,
324 			size, USB_CTRL_SET_TIMEOUT);
325 	if (ret < 0) {
326 		BT_ERR("Can't change to loading configuration err");
327 		kfree(send_buf);
328 		return ret;
329 	}
330 
331 	sent += size;
332 	count -= size;
333 
334 	pipe = usb_sndbulkpipe(udev, 0x02);
335 
336 	while (count) {
337 		/* workaround the compatibility issue with xHCI controller*/
338 		usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
339 
340 		size = min_t(uint, count, BULK_SIZE);
341 		memcpy(send_buf, firmware->data + sent, size);
342 
343 		err = usb_bulk_msg(udev, pipe, send_buf, size,
344 					&len, 3000);
345 		if (err || (len != size)) {
346 			ath3k_log_failed_loading(err, len, size, count);
347 			kfree(send_buf);
348 			return err;
349 		}
350 		sent  += size;
351 		count -= size;
352 	}
353 
354 	kfree(send_buf);
355 	return 0;
356 }
357 
358 static int ath3k_switch_pid(struct usb_device *udev)
359 {
360 	int pipe = 0;
361 
362 	pipe = usb_sndctrlpipe(udev, 0);
363 	return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
364 			USB_TYPE_VENDOR, 0, 0,
365 			NULL, 0, USB_CTRL_SET_TIMEOUT);
366 }
367 
368 static int ath3k_set_normal_mode(struct usb_device *udev)
369 {
370 	unsigned char fw_state;
371 	int pipe = 0, ret;
372 
373 	ret = ath3k_get_state(udev, &fw_state);
374 	if (ret < 0) {
375 		BT_ERR("Can't get state to change to normal mode err");
376 		return ret;
377 	}
378 
379 	if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
380 		BT_DBG("firmware was already in normal mode");
381 		return 0;
382 	}
383 
384 	pipe = usb_sndctrlpipe(udev, 0);
385 	return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
386 			USB_TYPE_VENDOR, 0, 0,
387 			NULL, 0, USB_CTRL_SET_TIMEOUT);
388 }
389 
390 static int ath3k_load_patch(struct usb_device *udev)
391 {
392 	unsigned char fw_state;
393 	char filename[ATH3K_NAME_LEN];
394 	const struct firmware *firmware;
395 	struct ath3k_version fw_version;
396 	__u32 pt_rom_version, pt_build_version;
397 	int ret;
398 
399 	ret = ath3k_get_state(udev, &fw_state);
400 	if (ret < 0) {
401 		BT_ERR("Can't get state to change to load ram patch err");
402 		return ret;
403 	}
404 
405 	if (fw_state & ATH3K_PATCH_UPDATE) {
406 		BT_DBG("Patch was already downloaded");
407 		return 0;
408 	}
409 
410 	ret = ath3k_get_version(udev, &fw_version);
411 	if (ret < 0) {
412 		BT_ERR("Can't get version to change to load ram patch err");
413 		return ret;
414 	}
415 
416 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
417 		 le32_to_cpu(fw_version.rom_version));
418 
419 	ret = request_firmware(&firmware, filename, &udev->dev);
420 	if (ret < 0) {
421 		BT_ERR("Patch file not found %s", filename);
422 		return ret;
423 	}
424 
425 	pt_rom_version = get_unaligned_le32(firmware->data +
426 					    firmware->size - 8);
427 	pt_build_version = get_unaligned_le32(firmware->data +
428 					      firmware->size - 4);
429 
430 	if (pt_rom_version != le32_to_cpu(fw_version.rom_version) ||
431 	    pt_build_version <= le32_to_cpu(fw_version.build_version)) {
432 		BT_ERR("Patch file version did not match with firmware");
433 		release_firmware(firmware);
434 		return -EINVAL;
435 	}
436 
437 	ret = ath3k_load_fwfile(udev, firmware);
438 	release_firmware(firmware);
439 
440 	return ret;
441 }
442 
443 static int ath3k_load_syscfg(struct usb_device *udev)
444 {
445 	unsigned char fw_state;
446 	char filename[ATH3K_NAME_LEN];
447 	const struct firmware *firmware;
448 	struct ath3k_version fw_version;
449 	int clk_value, ret;
450 
451 	ret = ath3k_get_state(udev, &fw_state);
452 	if (ret < 0) {
453 		BT_ERR("Can't get state to change to load configuration err");
454 		return -EBUSY;
455 	}
456 
457 	ret = ath3k_get_version(udev, &fw_version);
458 	if (ret < 0) {
459 		BT_ERR("Can't get version to change to load ram patch err");
460 		return ret;
461 	}
462 
463 	switch (fw_version.ref_clock) {
464 
465 	case ATH3K_XTAL_FREQ_26M:
466 		clk_value = 26;
467 		break;
468 	case ATH3K_XTAL_FREQ_40M:
469 		clk_value = 40;
470 		break;
471 	case ATH3K_XTAL_FREQ_19P2:
472 		clk_value = 19;
473 		break;
474 	default:
475 		clk_value = 0;
476 		break;
477 	}
478 
479 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
480 		le32_to_cpu(fw_version.rom_version), clk_value, ".dfu");
481 
482 	ret = request_firmware(&firmware, filename, &udev->dev);
483 	if (ret < 0) {
484 		BT_ERR("Configuration file not found %s", filename);
485 		return ret;
486 	}
487 
488 	ret = ath3k_load_fwfile(udev, firmware);
489 	release_firmware(firmware);
490 
491 	return ret;
492 }
493 
494 static int ath3k_probe(struct usb_interface *intf,
495 			const struct usb_device_id *id)
496 {
497 	const struct firmware *firmware;
498 	struct usb_device *udev = interface_to_usbdev(intf);
499 	int ret;
500 
501 	BT_DBG("intf %p id %p", intf, id);
502 
503 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
504 		return -ENODEV;
505 
506 	/* match device ID in ath3k blacklist table */
507 	if (!id->driver_info) {
508 		const struct usb_device_id *match;
509 
510 		match = usb_match_id(intf, ath3k_blist_tbl);
511 		if (match)
512 			id = match;
513 	}
514 
515 	/* load patch and sysconfig files for AR3012 */
516 	if (id->driver_info & BTUSB_ATH3012) {
517 		/* New firmware with patch and sysconfig files already loaded */
518 		if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
519 			return -ENODEV;
520 
521 		ret = ath3k_load_patch(udev);
522 		if (ret < 0) {
523 			BT_ERR("Loading patch file failed");
524 			return ret;
525 		}
526 		ret = ath3k_load_syscfg(udev);
527 		if (ret < 0) {
528 			BT_ERR("Loading sysconfig file failed");
529 			return ret;
530 		}
531 		ret = ath3k_set_normal_mode(udev);
532 		if (ret < 0) {
533 			BT_ERR("Set normal mode failed");
534 			return ret;
535 		}
536 		ath3k_switch_pid(udev);
537 		return 0;
538 	}
539 
540 	ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
541 	if (ret < 0) {
542 		if (ret == -ENOENT)
543 			BT_ERR("Firmware file \"%s\" not found",
544 							ATH3K_FIRMWARE);
545 		else
546 			BT_ERR("Firmware file \"%s\" request failed (err=%d)",
547 							ATH3K_FIRMWARE, ret);
548 		return ret;
549 	}
550 
551 	ret = ath3k_load_firmware(udev, firmware);
552 	release_firmware(firmware);
553 
554 	return ret;
555 }
556 
557 static void ath3k_disconnect(struct usb_interface *intf)
558 {
559 	BT_DBG("%s intf %p", __func__, intf);
560 }
561 
562 static struct usb_driver ath3k_driver = {
563 	.name		= "ath3k",
564 	.probe		= ath3k_probe,
565 	.disconnect	= ath3k_disconnect,
566 	.id_table	= ath3k_table,
567 	.disable_hub_initiated_lpm = 1,
568 };
569 
570 module_usb_driver(ath3k_driver);
571 
572 MODULE_AUTHOR("Atheros Communications");
573 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
574 MODULE_VERSION(VERSION);
575 MODULE_LICENSE("GPL");
576 MODULE_FIRMWARE(ATH3K_FIRMWARE);
577