xref: /openbmc/linux/drivers/bluetooth/ath3k.c (revision 293d5b43)
1 /*
2  * Copyright (c) 2008-2009 Atheros Communications Inc.
3  *
4  *  This program is free software; you can redistribute it and/or modify
5  *  it under the terms of the GNU General Public License as published by
6  *  the Free Software Foundation; either version 2 of the License, or
7  *  (at your option) any later version.
8  *
9  *  This program is distributed in the hope that it will be useful,
10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *  GNU General Public License for more details.
13  *
14  *  You should have received a copy of the GNU General Public License
15  *  along with this program; if not, write to the Free Software
16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17  *
18  */
19 
20 
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/types.h>
26 #include <linux/errno.h>
27 #include <linux/device.h>
28 #include <linux/firmware.h>
29 #include <linux/usb.h>
30 #include <asm/unaligned.h>
31 #include <net/bluetooth/bluetooth.h>
32 
33 #define VERSION "1.0"
34 #define ATH3K_FIRMWARE	"ath3k-1.fw"
35 
36 #define ATH3K_DNLOAD				0x01
37 #define ATH3K_GETSTATE				0x05
38 #define ATH3K_SET_NORMAL_MODE			0x07
39 #define ATH3K_GETVERSION			0x09
40 #define USB_REG_SWITCH_VID_PID			0x0a
41 
42 #define ATH3K_MODE_MASK				0x3F
43 #define ATH3K_NORMAL_MODE			0x0E
44 
45 #define ATH3K_PATCH_UPDATE			0x80
46 #define ATH3K_SYSCFG_UPDATE			0x40
47 
48 #define ATH3K_XTAL_FREQ_26M			0x00
49 #define ATH3K_XTAL_FREQ_40M			0x01
50 #define ATH3K_XTAL_FREQ_19P2			0x02
51 #define ATH3K_NAME_LEN				0xFF
52 
53 struct ath3k_version {
54 	__le32	rom_version;
55 	__le32	build_version;
56 	__le32	ram_version;
57 	__u8	ref_clock;
58 	__u8	reserved[7];
59 } __packed;
60 
61 static const struct usb_device_id ath3k_table[] = {
62 	/* Atheros AR3011 */
63 	{ USB_DEVICE(0x0CF3, 0x3000) },
64 
65 	/* Atheros AR3011 with sflash firmware*/
66 	{ USB_DEVICE(0x0489, 0xE027) },
67 	{ USB_DEVICE(0x0489, 0xE03D) },
68 	{ USB_DEVICE(0x04F2, 0xAFF1) },
69 	{ USB_DEVICE(0x0930, 0x0215) },
70 	{ USB_DEVICE(0x0CF3, 0x3002) },
71 	{ USB_DEVICE(0x0CF3, 0xE019) },
72 	{ USB_DEVICE(0x13d3, 0x3304) },
73 
74 	/* Atheros AR9285 Malbec with sflash firmware */
75 	{ USB_DEVICE(0x03F0, 0x311D) },
76 
77 	/* Atheros AR3012 with sflash firmware*/
78 	{ USB_DEVICE(0x0489, 0xe04d) },
79 	{ USB_DEVICE(0x0489, 0xe04e) },
80 	{ USB_DEVICE(0x0489, 0xe057) },
81 	{ USB_DEVICE(0x0489, 0xe056) },
82 	{ USB_DEVICE(0x0489, 0xe05f) },
83 	{ USB_DEVICE(0x0489, 0xe076) },
84 	{ USB_DEVICE(0x0489, 0xe078) },
85 	{ USB_DEVICE(0x0489, 0xe095) },
86 	{ USB_DEVICE(0x04c5, 0x1330) },
87 	{ USB_DEVICE(0x04CA, 0x3004) },
88 	{ USB_DEVICE(0x04CA, 0x3005) },
89 	{ USB_DEVICE(0x04CA, 0x3006) },
90 	{ USB_DEVICE(0x04CA, 0x3007) },
91 	{ USB_DEVICE(0x04CA, 0x3008) },
92 	{ USB_DEVICE(0x04CA, 0x300b) },
93 	{ USB_DEVICE(0x04CA, 0x300d) },
94 	{ USB_DEVICE(0x04CA, 0x300f) },
95 	{ USB_DEVICE(0x04CA, 0x3010) },
96 	{ USB_DEVICE(0x04CA, 0x3014) },
97 	{ USB_DEVICE(0x0930, 0x0219) },
98 	{ USB_DEVICE(0x0930, 0x021c) },
99 	{ USB_DEVICE(0x0930, 0x0220) },
100 	{ USB_DEVICE(0x0930, 0x0227) },
101 	{ USB_DEVICE(0x0b05, 0x17d0) },
102 	{ USB_DEVICE(0x0CF3, 0x0036) },
103 	{ USB_DEVICE(0x0CF3, 0x3004) },
104 	{ USB_DEVICE(0x0CF3, 0x3008) },
105 	{ USB_DEVICE(0x0CF3, 0x311D) },
106 	{ USB_DEVICE(0x0CF3, 0x311E) },
107 	{ USB_DEVICE(0x0CF3, 0x311F) },
108 	{ USB_DEVICE(0x0cf3, 0x3121) },
109 	{ USB_DEVICE(0x0CF3, 0x817a) },
110 	{ USB_DEVICE(0x0CF3, 0x817b) },
111 	{ USB_DEVICE(0x0cf3, 0xe003) },
112 	{ USB_DEVICE(0x0CF3, 0xE004) },
113 	{ USB_DEVICE(0x0CF3, 0xE005) },
114 	{ USB_DEVICE(0x0CF3, 0xE006) },
115 	{ USB_DEVICE(0x13d3, 0x3362) },
116 	{ USB_DEVICE(0x13d3, 0x3375) },
117 	{ USB_DEVICE(0x13d3, 0x3393) },
118 	{ USB_DEVICE(0x13d3, 0x3395) },
119 	{ USB_DEVICE(0x13d3, 0x3402) },
120 	{ USB_DEVICE(0x13d3, 0x3408) },
121 	{ USB_DEVICE(0x13d3, 0x3423) },
122 	{ USB_DEVICE(0x13d3, 0x3432) },
123 	{ USB_DEVICE(0x13d3, 0x3472) },
124 	{ USB_DEVICE(0x13d3, 0x3474) },
125 	{ USB_DEVICE(0x13d3, 0x3487) },
126 	{ USB_DEVICE(0x13d3, 0x3490) },
127 
128 	/* Atheros AR5BBU12 with sflash firmware */
129 	{ USB_DEVICE(0x0489, 0xE02C) },
130 
131 	/* Atheros AR5BBU22 with sflash firmware */
132 	{ USB_DEVICE(0x0489, 0xE036) },
133 	{ USB_DEVICE(0x0489, 0xE03C) },
134 
135 	{ }	/* Terminating entry */
136 };
137 
138 MODULE_DEVICE_TABLE(usb, ath3k_table);
139 
140 #define BTUSB_ATH3012		0x80
141 /* This table is to load patch and sysconfig files
142  * for AR3012 */
143 static const struct usb_device_id ath3k_blist_tbl[] = {
144 
145 	/* Atheros AR3012 with sflash firmware*/
146 	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
147 	{ USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
148 	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
149 	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
150 	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
151 	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
152 	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
153 	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
154 	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
155 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
156 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
157 	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
158 	{ USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
159 	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
160 	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
161 	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
162 	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
163 	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
164 	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
165 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
166 	{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
167 	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
168 	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
169 	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
170 	{ USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
171 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
172 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
173 	{ USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
174 	{ USB_DEVICE(0x0cf3, 0x311E), .driver_info = BTUSB_ATH3012 },
175 	{ USB_DEVICE(0x0cf3, 0x311F), .driver_info = BTUSB_ATH3012 },
176 	{ USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
177 	{ USB_DEVICE(0x0CF3, 0x817a), .driver_info = BTUSB_ATH3012 },
178 	{ USB_DEVICE(0x0CF3, 0x817b), .driver_info = BTUSB_ATH3012 },
179 	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
180 	{ USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
181 	{ USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
182 	{ USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
183 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
184 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
185 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
186 	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
187 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
188 	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
189 	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
190 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
191 	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
192 	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
193 	{ USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
194 	{ USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },
195 
196 	/* Atheros AR5BBU22 with sflash firmware */
197 	{ USB_DEVICE(0x0489, 0xE036), .driver_info = BTUSB_ATH3012 },
198 	{ USB_DEVICE(0x0489, 0xE03C), .driver_info = BTUSB_ATH3012 },
199 
200 	{ }	/* Terminating entry */
201 };
202 
203 #define USB_REQ_DFU_DNLOAD	1
204 #define BULK_SIZE		4096
205 #define FW_HDR_SIZE		20
206 #define TIMEGAP_USEC_MIN	50
207 #define TIMEGAP_USEC_MAX	100
208 
209 static int ath3k_load_firmware(struct usb_device *udev,
210 				const struct firmware *firmware)
211 {
212 	u8 *send_buf;
213 	int len = 0;
214 	int err, pipe, size, sent = 0;
215 	int count = firmware->size;
216 
217 	BT_DBG("udev %p", udev);
218 
219 	pipe = usb_sndctrlpipe(udev, 0);
220 
221 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
222 	if (!send_buf) {
223 		BT_ERR("Can't allocate memory chunk for firmware");
224 		return -ENOMEM;
225 	}
226 
227 	memcpy(send_buf, firmware->data, 20);
228 	err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
229 			      0, 0, send_buf, 20, USB_CTRL_SET_TIMEOUT);
230 	if (err < 0) {
231 		BT_ERR("Can't change to loading configuration err");
232 		goto error;
233 	}
234 	sent += 20;
235 	count -= 20;
236 
237 	pipe = usb_sndbulkpipe(udev, 0x02);
238 
239 	while (count) {
240 		/* workaround the compatibility issue with xHCI controller*/
241 		usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
242 
243 		size = min_t(uint, count, BULK_SIZE);
244 		memcpy(send_buf, firmware->data + sent, size);
245 
246 		err = usb_bulk_msg(udev, pipe, send_buf, size,
247 					&len, 3000);
248 
249 		if (err || (len != size)) {
250 			BT_ERR("Error in firmware loading err = %d,"
251 				"len = %d, size = %d", err, len, size);
252 			goto error;
253 		}
254 
255 		sent  += size;
256 		count -= size;
257 	}
258 
259 error:
260 	kfree(send_buf);
261 	return err;
262 }
263 
264 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
265 {
266 	int ret, pipe = 0;
267 	char *buf;
268 
269 	buf = kmalloc(sizeof(*buf), GFP_KERNEL);
270 	if (!buf)
271 		return -ENOMEM;
272 
273 	pipe = usb_rcvctrlpipe(udev, 0);
274 	ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE,
275 			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
276 			      buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT);
277 
278 	*state = *buf;
279 	kfree(buf);
280 
281 	return ret;
282 }
283 
284 static int ath3k_get_version(struct usb_device *udev,
285 			struct ath3k_version *version)
286 {
287 	int ret, pipe = 0;
288 	struct ath3k_version *buf;
289 	const int size = sizeof(*buf);
290 
291 	buf = kmalloc(size, GFP_KERNEL);
292 	if (!buf)
293 		return -ENOMEM;
294 
295 	pipe = usb_rcvctrlpipe(udev, 0);
296 	ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION,
297 			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
298 			      buf, size, USB_CTRL_SET_TIMEOUT);
299 
300 	memcpy(version, buf, size);
301 	kfree(buf);
302 
303 	return ret;
304 }
305 
306 static int ath3k_load_fwfile(struct usb_device *udev,
307 		const struct firmware *firmware)
308 {
309 	u8 *send_buf;
310 	int len = 0;
311 	int err, pipe, size, count, sent = 0;
312 	int ret;
313 
314 	count = firmware->size;
315 
316 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
317 	if (!send_buf) {
318 		BT_ERR("Can't allocate memory chunk for firmware");
319 		return -ENOMEM;
320 	}
321 
322 	size = min_t(uint, count, FW_HDR_SIZE);
323 	memcpy(send_buf, firmware->data, size);
324 
325 	pipe = usb_sndctrlpipe(udev, 0);
326 	ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
327 			USB_TYPE_VENDOR, 0, 0, send_buf,
328 			size, USB_CTRL_SET_TIMEOUT);
329 	if (ret < 0) {
330 		BT_ERR("Can't change to loading configuration err");
331 		kfree(send_buf);
332 		return ret;
333 	}
334 
335 	sent += size;
336 	count -= size;
337 
338 	pipe = usb_sndbulkpipe(udev, 0x02);
339 
340 	while (count) {
341 		/* workaround the compatibility issue with xHCI controller*/
342 		usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);
343 
344 		size = min_t(uint, count, BULK_SIZE);
345 		memcpy(send_buf, firmware->data + sent, size);
346 
347 		err = usb_bulk_msg(udev, pipe, send_buf, size,
348 					&len, 3000);
349 		if (err || (len != size)) {
350 			BT_ERR("Error in firmware loading err = %d,"
351 				"len = %d, size = %d", err, len, size);
352 			kfree(send_buf);
353 			return err;
354 		}
355 		sent  += size;
356 		count -= size;
357 	}
358 
359 	kfree(send_buf);
360 	return 0;
361 }
362 
363 static int ath3k_switch_pid(struct usb_device *udev)
364 {
365 	int pipe = 0;
366 
367 	pipe = usb_sndctrlpipe(udev, 0);
368 	return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
369 			USB_TYPE_VENDOR, 0, 0,
370 			NULL, 0, USB_CTRL_SET_TIMEOUT);
371 }
372 
373 static int ath3k_set_normal_mode(struct usb_device *udev)
374 {
375 	unsigned char fw_state;
376 	int pipe = 0, ret;
377 
378 	ret = ath3k_get_state(udev, &fw_state);
379 	if (ret < 0) {
380 		BT_ERR("Can't get state to change to normal mode err");
381 		return ret;
382 	}
383 
384 	if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
385 		BT_DBG("firmware was already in normal mode");
386 		return 0;
387 	}
388 
389 	pipe = usb_sndctrlpipe(udev, 0);
390 	return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
391 			USB_TYPE_VENDOR, 0, 0,
392 			NULL, 0, USB_CTRL_SET_TIMEOUT);
393 }
394 
395 static int ath3k_load_patch(struct usb_device *udev)
396 {
397 	unsigned char fw_state;
398 	char filename[ATH3K_NAME_LEN] = {0};
399 	const struct firmware *firmware;
400 	struct ath3k_version fw_version;
401 	__u32 pt_rom_version, pt_build_version;
402 	int ret;
403 
404 	ret = ath3k_get_state(udev, &fw_state);
405 	if (ret < 0) {
406 		BT_ERR("Can't get state to change to load ram patch err");
407 		return ret;
408 	}
409 
410 	if (fw_state & ATH3K_PATCH_UPDATE) {
411 		BT_DBG("Patch was already downloaded");
412 		return 0;
413 	}
414 
415 	ret = ath3k_get_version(udev, &fw_version);
416 	if (ret < 0) {
417 		BT_ERR("Can't get version to change to load ram patch err");
418 		return ret;
419 	}
420 
421 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
422 		 le32_to_cpu(fw_version.rom_version));
423 
424 	ret = request_firmware(&firmware, filename, &udev->dev);
425 	if (ret < 0) {
426 		BT_ERR("Patch file not found %s", filename);
427 		return ret;
428 	}
429 
430 	pt_rom_version = get_unaligned_le32(firmware->data +
431 					    firmware->size - 8);
432 	pt_build_version = get_unaligned_le32(firmware->data +
433 					      firmware->size - 4);
434 
435 	if (pt_rom_version != le32_to_cpu(fw_version.rom_version) ||
436 	    pt_build_version <= le32_to_cpu(fw_version.build_version)) {
437 		BT_ERR("Patch file version did not match with firmware");
438 		release_firmware(firmware);
439 		return -EINVAL;
440 	}
441 
442 	ret = ath3k_load_fwfile(udev, firmware);
443 	release_firmware(firmware);
444 
445 	return ret;
446 }
447 
448 static int ath3k_load_syscfg(struct usb_device *udev)
449 {
450 	unsigned char fw_state;
451 	char filename[ATH3K_NAME_LEN] = {0};
452 	const struct firmware *firmware;
453 	struct ath3k_version fw_version;
454 	int clk_value, ret;
455 
456 	ret = ath3k_get_state(udev, &fw_state);
457 	if (ret < 0) {
458 		BT_ERR("Can't get state to change to load configuration err");
459 		return -EBUSY;
460 	}
461 
462 	ret = ath3k_get_version(udev, &fw_version);
463 	if (ret < 0) {
464 		BT_ERR("Can't get version to change to load ram patch err");
465 		return ret;
466 	}
467 
468 	switch (fw_version.ref_clock) {
469 
470 	case ATH3K_XTAL_FREQ_26M:
471 		clk_value = 26;
472 		break;
473 	case ATH3K_XTAL_FREQ_40M:
474 		clk_value = 40;
475 		break;
476 	case ATH3K_XTAL_FREQ_19P2:
477 		clk_value = 19;
478 		break;
479 	default:
480 		clk_value = 0;
481 		break;
482 	}
483 
484 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
485 		le32_to_cpu(fw_version.rom_version), clk_value, ".dfu");
486 
487 	ret = request_firmware(&firmware, filename, &udev->dev);
488 	if (ret < 0) {
489 		BT_ERR("Configuration file not found %s", filename);
490 		return ret;
491 	}
492 
493 	ret = ath3k_load_fwfile(udev, firmware);
494 	release_firmware(firmware);
495 
496 	return ret;
497 }
498 
499 static int ath3k_probe(struct usb_interface *intf,
500 			const struct usb_device_id *id)
501 {
502 	const struct firmware *firmware;
503 	struct usb_device *udev = interface_to_usbdev(intf);
504 	int ret;
505 
506 	BT_DBG("intf %p id %p", intf, id);
507 
508 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
509 		return -ENODEV;
510 
511 	/* match device ID in ath3k blacklist table */
512 	if (!id->driver_info) {
513 		const struct usb_device_id *match;
514 
515 		match = usb_match_id(intf, ath3k_blist_tbl);
516 		if (match)
517 			id = match;
518 	}
519 
520 	/* load patch and sysconfig files for AR3012 */
521 	if (id->driver_info & BTUSB_ATH3012) {
522 
523 		/* New firmware with patch and sysconfig files already loaded */
524 		if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
525 			return -ENODEV;
526 
527 		ret = ath3k_load_patch(udev);
528 		if (ret < 0) {
529 			BT_ERR("Loading patch file failed");
530 			return ret;
531 		}
532 		ret = ath3k_load_syscfg(udev);
533 		if (ret < 0) {
534 			BT_ERR("Loading sysconfig file failed");
535 			return ret;
536 		}
537 		ret = ath3k_set_normal_mode(udev);
538 		if (ret < 0) {
539 			BT_ERR("Set normal mode failed");
540 			return ret;
541 		}
542 		ath3k_switch_pid(udev);
543 		return 0;
544 	}
545 
546 	ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
547 	if (ret < 0) {
548 		if (ret == -ENOENT)
549 			BT_ERR("Firmware file \"%s\" not found",
550 							ATH3K_FIRMWARE);
551 		else
552 			BT_ERR("Firmware file \"%s\" request failed (err=%d)",
553 							ATH3K_FIRMWARE, ret);
554 		return ret;
555 	}
556 
557 	ret = ath3k_load_firmware(udev, firmware);
558 	release_firmware(firmware);
559 
560 	return ret;
561 }
562 
563 static void ath3k_disconnect(struct usb_interface *intf)
564 {
565 	BT_DBG("ath3k_disconnect intf %p", intf);
566 }
567 
568 static struct usb_driver ath3k_driver = {
569 	.name		= "ath3k",
570 	.probe		= ath3k_probe,
571 	.disconnect	= ath3k_disconnect,
572 	.id_table	= ath3k_table,
573 	.disable_hub_initiated_lpm = 1,
574 };
575 
576 module_usb_driver(ath3k_driver);
577 
578 MODULE_AUTHOR("Atheros Communications");
579 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
580 MODULE_VERSION(VERSION);
581 MODULE_LICENSE("GPL");
582 MODULE_FIRMWARE(ATH3K_FIRMWARE);
583