1 // SPDX-License-Identifier: ISC
2 /*
3  * Copyright (c) 2011 Broadcom Corporation
4  */
5 
6 #include <linux/kernel.h>
7 #include <linux/module.h>
8 #include <linux/firmware.h>
9 #include <linux/usb.h>
10 #include <linux/vmalloc.h>
11 
12 #include <brcmu_utils.h>
13 #include <brcm_hw_ids.h>
14 #include <brcmu_wifi.h>
15 #include "bus.h"
16 #include "debug.h"
17 #include "firmware.h"
18 #include "usb.h"
19 #include "core.h"
20 #include "common.h"
21 #include "bcdc.h"
22 
23 
24 #define IOCTL_RESP_TIMEOUT		msecs_to_jiffies(2000)
25 
26 #define BRCMF_USB_RESET_GETVER_SPINWAIT	100	/* in unit of ms */
27 #define BRCMF_USB_RESET_GETVER_LOOP_CNT	10
28 
29 #define BRCMF_POSTBOOT_ID		0xA123  /* ID to detect if dongle
30 						   has boot up */
31 #define BRCMF_USB_NRXQ			50
32 #define BRCMF_USB_NTXQ			50
33 
34 #define BRCMF_USB_CBCTL_WRITE		0
35 #define BRCMF_USB_CBCTL_READ		1
36 #define BRCMF_USB_MAX_PKT_SIZE		1600
37 
38 BRCMF_FW_DEF(43143, "brcmfmac43143");
39 BRCMF_FW_DEF(43236B, "brcmfmac43236b");
40 BRCMF_FW_DEF(43242A, "brcmfmac43242a");
41 BRCMF_FW_DEF(43569, "brcmfmac43569");
42 BRCMF_FW_DEF(4373, "brcmfmac4373");
43 
44 static const struct brcmf_firmware_mapping brcmf_usb_fwnames[] = {
45 	BRCMF_FW_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
46 	BRCMF_FW_ENTRY(BRCM_CC_43235_CHIP_ID, 0x00000008, 43236B),
47 	BRCMF_FW_ENTRY(BRCM_CC_43236_CHIP_ID, 0x00000008, 43236B),
48 	BRCMF_FW_ENTRY(BRCM_CC_43238_CHIP_ID, 0x00000008, 43236B),
49 	BRCMF_FW_ENTRY(BRCM_CC_43242_CHIP_ID, 0xFFFFFFFF, 43242A),
50 	BRCMF_FW_ENTRY(BRCM_CC_43566_CHIP_ID, 0xFFFFFFFF, 43569),
51 	BRCMF_FW_ENTRY(BRCM_CC_43569_CHIP_ID, 0xFFFFFFFF, 43569),
52 	BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373)
53 };
54 
55 #define TRX_MAGIC		0x30524448	/* "HDR0" */
56 #define TRX_MAX_OFFSET		3		/* Max number of file offsets */
57 #define TRX_UNCOMP_IMAGE	0x20		/* Trx holds uncompressed img */
58 #define TRX_RDL_CHUNK		1500		/* size of each dl transfer */
59 #define TRX_OFFSETS_DLFWLEN_IDX	0
60 
61 /* Control messages: bRequest values */
62 #define DL_GETSTATE	0	/* returns the rdl_state_t struct */
63 #define DL_CHECK_CRC	1	/* currently unused */
64 #define DL_GO		2	/* execute downloaded image */
65 #define DL_START	3	/* initialize dl state */
66 #define DL_REBOOT	4	/* reboot the device in 2 seconds */
67 #define DL_GETVER	5	/* returns the bootrom_id_t struct */
68 #define DL_GO_PROTECTED	6	/* execute the downloaded code and set reset
69 				 * event to occur in 2 seconds.  It is the
70 				 * responsibility of the downloaded code to
71 				 * clear this event
72 				 */
73 #define DL_EXEC		7	/* jump to a supplied address */
74 #define DL_RESETCFG	8	/* To support single enum on dongle
75 				 * - Not used by bootloader
76 				 */
77 #define DL_DEFER_RESP_OK 9	/* Potentially defer the response to setup
78 				 * if resp unavailable
79 				 */
80 
81 /* states */
82 #define DL_WAITING	0	/* waiting to rx first pkt */
83 #define DL_READY	1	/* hdr was good, waiting for more of the
84 				 * compressed image
85 				 */
86 #define DL_BAD_HDR	2	/* hdr was corrupted */
87 #define DL_BAD_CRC	3	/* compressed image was corrupted */
88 #define DL_RUNNABLE	4	/* download was successful,waiting for go cmd */
89 #define DL_START_FAIL	5	/* failed to initialize correctly */
90 #define DL_NVRAM_TOOBIG	6	/* host specified nvram data exceeds DL_NVRAM
91 				 * value
92 				 */
93 #define DL_IMAGE_TOOBIG	7	/* firmware image too big */
94 
95 
96 struct trx_header_le {
97 	__le32 magic;		/* "HDR0" */
98 	__le32 len;		/* Length of file including header */
99 	__le32 crc32;		/* CRC from flag_version to end of file */
100 	__le32 flag_version;	/* 0:15 flags, 16:31 version */
101 	__le32 offsets[TRX_MAX_OFFSET];	/* Offsets of partitions from start of
102 					 * header
103 					 */
104 };
105 
106 struct rdl_state_le {
107 	__le32 state;
108 	__le32 bytes;
109 };
110 
111 struct bootrom_id_le {
112 	__le32 chip;		/* Chip id */
113 	__le32 chiprev;		/* Chip rev */
114 	__le32 ramsize;		/* Size of  RAM */
115 	__le32 remapbase;	/* Current remap base address */
116 	__le32 boardtype;	/* Type of board */
117 	__le32 boardrev;	/* Board revision */
118 };
119 
120 struct brcmf_usb_image {
121 	struct list_head list;
122 	s8 *fwname;
123 	u8 *image;
124 	int image_len;
125 };
126 
127 struct brcmf_usbdev_info {
128 	struct brcmf_usbdev bus_pub; /* MUST BE FIRST */
129 	spinlock_t qlock;
130 	struct list_head rx_freeq;
131 	struct list_head rx_postq;
132 	struct list_head tx_freeq;
133 	struct list_head tx_postq;
134 	uint rx_pipe, tx_pipe;
135 
136 	int rx_low_watermark;
137 	int tx_low_watermark;
138 	int tx_high_watermark;
139 	int tx_freecount;
140 	bool tx_flowblock;
141 	spinlock_t tx_flowblock_lock;
142 
143 	struct brcmf_usbreq *tx_reqs;
144 	struct brcmf_usbreq *rx_reqs;
145 
146 	char fw_name[BRCMF_FW_NAME_LEN];
147 	const u8 *image;	/* buffer for combine fw and nvram */
148 	int image_len;
149 
150 	struct usb_device *usbdev;
151 	struct device *dev;
152 	struct completion dev_init_done;
153 
154 	int ctl_in_pipe, ctl_out_pipe;
155 	struct urb *ctl_urb; /* URB for control endpoint */
156 	struct usb_ctrlrequest ctl_write;
157 	struct usb_ctrlrequest ctl_read;
158 	u32 ctl_urb_actual_length;
159 	int ctl_urb_status;
160 	int ctl_completed;
161 	wait_queue_head_t ioctl_resp_wait;
162 	ulong ctl_op;
163 	u8 ifnum;
164 
165 	struct urb *bulk_urb; /* used for FW download */
166 
167 	bool wowl_enabled;
168 	struct brcmf_mp_device *settings;
169 };
170 
171 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
172 				struct brcmf_usbreq  *req);
173 
174 static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev)
175 {
176 	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
177 	return bus_if->bus_priv.usb;
178 }
179 
180 static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev)
181 {
182 	return brcmf_usb_get_buspub(dev)->devinfo;
183 }
184 
185 static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo)
186 {
187 	return wait_event_timeout(devinfo->ioctl_resp_wait,
188 				  devinfo->ctl_completed, IOCTL_RESP_TIMEOUT);
189 }
190 
191 static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo)
192 {
193 	wake_up(&devinfo->ioctl_resp_wait);
194 }
195 
196 static void
197 brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status)
198 {
199 	brcmf_dbg(USB, "Enter, status=%d\n", status);
200 
201 	if (unlikely(devinfo == NULL))
202 		return;
203 
204 	if (type == BRCMF_USB_CBCTL_READ) {
205 		if (status == 0)
206 			devinfo->bus_pub.stats.rx_ctlpkts++;
207 		else
208 			devinfo->bus_pub.stats.rx_ctlerrs++;
209 	} else if (type == BRCMF_USB_CBCTL_WRITE) {
210 		if (status == 0)
211 			devinfo->bus_pub.stats.tx_ctlpkts++;
212 		else
213 			devinfo->bus_pub.stats.tx_ctlerrs++;
214 	}
215 
216 	devinfo->ctl_urb_status = status;
217 	devinfo->ctl_completed = true;
218 	brcmf_usb_ioctl_resp_wake(devinfo);
219 }
220 
221 static void
222 brcmf_usb_ctlread_complete(struct urb *urb)
223 {
224 	struct brcmf_usbdev_info *devinfo =
225 		(struct brcmf_usbdev_info *)urb->context;
226 
227 	brcmf_dbg(USB, "Enter\n");
228 	devinfo->ctl_urb_actual_length = urb->actual_length;
229 	brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ,
230 		urb->status);
231 }
232 
233 static void
234 brcmf_usb_ctlwrite_complete(struct urb *urb)
235 {
236 	struct brcmf_usbdev_info *devinfo =
237 		(struct brcmf_usbdev_info *)urb->context;
238 
239 	brcmf_dbg(USB, "Enter\n");
240 	brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE,
241 		urb->status);
242 }
243 
244 static int
245 brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
246 {
247 	int ret;
248 	u16 size;
249 
250 	brcmf_dbg(USB, "Enter\n");
251 	if (devinfo == NULL || buf == NULL ||
252 	    len == 0 || devinfo->ctl_urb == NULL)
253 		return -EINVAL;
254 
255 	size = len;
256 	devinfo->ctl_write.wLength = cpu_to_le16p(&size);
257 	devinfo->ctl_urb->transfer_buffer_length = size;
258 	devinfo->ctl_urb_status = 0;
259 	devinfo->ctl_urb_actual_length = 0;
260 
261 	usb_fill_control_urb(devinfo->ctl_urb,
262 		devinfo->usbdev,
263 		devinfo->ctl_out_pipe,
264 		(unsigned char *) &devinfo->ctl_write,
265 		buf, size,
266 		(usb_complete_t)brcmf_usb_ctlwrite_complete,
267 		devinfo);
268 
269 	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
270 	if (ret < 0)
271 		brcmf_err("usb_submit_urb failed %d\n", ret);
272 
273 	return ret;
274 }
275 
276 static int
277 brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
278 {
279 	int ret;
280 	u16 size;
281 
282 	brcmf_dbg(USB, "Enter\n");
283 	if ((devinfo == NULL) || (buf == NULL) || (len == 0)
284 		|| (devinfo->ctl_urb == NULL))
285 		return -EINVAL;
286 
287 	size = len;
288 	devinfo->ctl_read.wLength = cpu_to_le16p(&size);
289 	devinfo->ctl_urb->transfer_buffer_length = size;
290 
291 	devinfo->ctl_read.bRequestType = USB_DIR_IN
292 		| USB_TYPE_CLASS | USB_RECIP_INTERFACE;
293 	devinfo->ctl_read.bRequest = 1;
294 
295 	usb_fill_control_urb(devinfo->ctl_urb,
296 		devinfo->usbdev,
297 		devinfo->ctl_in_pipe,
298 		(unsigned char *) &devinfo->ctl_read,
299 		buf, size,
300 		(usb_complete_t)brcmf_usb_ctlread_complete,
301 		devinfo);
302 
303 	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
304 	if (ret < 0)
305 		brcmf_err("usb_submit_urb failed %d\n", ret);
306 
307 	return ret;
308 }
309 
310 static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len)
311 {
312 	int err = 0;
313 	int timeout = 0;
314 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
315 
316 	brcmf_dbg(USB, "Enter\n");
317 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP)
318 		return -EIO;
319 
320 	if (test_and_set_bit(0, &devinfo->ctl_op))
321 		return -EIO;
322 
323 	devinfo->ctl_completed = false;
324 	err = brcmf_usb_send_ctl(devinfo, buf, len);
325 	if (err) {
326 		brcmf_err("fail %d bytes: %d\n", err, len);
327 		clear_bit(0, &devinfo->ctl_op);
328 		return err;
329 	}
330 	timeout = brcmf_usb_ioctl_resp_wait(devinfo);
331 	clear_bit(0, &devinfo->ctl_op);
332 	if (!timeout) {
333 		brcmf_err("Txctl wait timed out\n");
334 		err = -EIO;
335 	}
336 	return err;
337 }
338 
339 static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len)
340 {
341 	int err = 0;
342 	int timeout = 0;
343 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
344 
345 	brcmf_dbg(USB, "Enter\n");
346 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP)
347 		return -EIO;
348 
349 	if (test_and_set_bit(0, &devinfo->ctl_op))
350 		return -EIO;
351 
352 	devinfo->ctl_completed = false;
353 	err = brcmf_usb_recv_ctl(devinfo, buf, len);
354 	if (err) {
355 		brcmf_err("fail %d bytes: %d\n", err, len);
356 		clear_bit(0, &devinfo->ctl_op);
357 		return err;
358 	}
359 	timeout = brcmf_usb_ioctl_resp_wait(devinfo);
360 	err = devinfo->ctl_urb_status;
361 	clear_bit(0, &devinfo->ctl_op);
362 	if (!timeout) {
363 		brcmf_err("rxctl wait timed out\n");
364 		err = -EIO;
365 	}
366 	if (!err)
367 		return devinfo->ctl_urb_actual_length;
368 	else
369 		return err;
370 }
371 
372 static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo,
373 					  struct list_head *q, int *counter)
374 {
375 	unsigned long flags;
376 	struct brcmf_usbreq  *req;
377 	spin_lock_irqsave(&devinfo->qlock, flags);
378 	if (list_empty(q)) {
379 		spin_unlock_irqrestore(&devinfo->qlock, flags);
380 		return NULL;
381 	}
382 	req = list_entry(q->next, struct brcmf_usbreq, list);
383 	list_del_init(q->next);
384 	if (counter)
385 		(*counter)--;
386 	spin_unlock_irqrestore(&devinfo->qlock, flags);
387 	return req;
388 
389 }
390 
391 static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo,
392 			  struct list_head *q, struct brcmf_usbreq *req,
393 			  int *counter)
394 {
395 	unsigned long flags;
396 	spin_lock_irqsave(&devinfo->qlock, flags);
397 	list_add_tail(&req->list, q);
398 	if (counter)
399 		(*counter)++;
400 	spin_unlock_irqrestore(&devinfo->qlock, flags);
401 }
402 
403 static struct brcmf_usbreq *
404 brcmf_usbdev_qinit(struct list_head *q, int qsize)
405 {
406 	int i;
407 	struct brcmf_usbreq *req, *reqs;
408 
409 	reqs = kcalloc(qsize, sizeof(struct brcmf_usbreq), GFP_ATOMIC);
410 	if (reqs == NULL)
411 		return NULL;
412 
413 	req = reqs;
414 
415 	for (i = 0; i < qsize; i++) {
416 		req->urb = usb_alloc_urb(0, GFP_ATOMIC);
417 		if (!req->urb)
418 			goto fail;
419 
420 		INIT_LIST_HEAD(&req->list);
421 		list_add_tail(&req->list, q);
422 		req++;
423 	}
424 	return reqs;
425 fail:
426 	brcmf_err("fail!\n");
427 	while (!list_empty(q)) {
428 		req = list_entry(q->next, struct brcmf_usbreq, list);
429 		if (req)
430 			usb_free_urb(req->urb);
431 		list_del(q->next);
432 	}
433 	kfree(reqs);
434 	return NULL;
435 
436 }
437 
438 static void brcmf_usb_free_q(struct list_head *q)
439 {
440 	struct brcmf_usbreq *req, *next;
441 
442 	list_for_each_entry_safe(req, next, q, list) {
443 		if (!req->urb) {
444 			brcmf_err("bad req\n");
445 			break;
446 		}
447 		usb_free_urb(req->urb);
448 		list_del_init(&req->list);
449 	}
450 }
451 
452 static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo,
453 				struct brcmf_usbreq *req)
454 {
455 	unsigned long flags;
456 
457 	spin_lock_irqsave(&devinfo->qlock, flags);
458 	list_del_init(&req->list);
459 	spin_unlock_irqrestore(&devinfo->qlock, flags);
460 }
461 
462 
463 static void brcmf_usb_tx_complete(struct urb *urb)
464 {
465 	struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context;
466 	struct brcmf_usbdev_info *devinfo = req->devinfo;
467 	unsigned long flags;
468 
469 	brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status,
470 		  req->skb);
471 	brcmf_usb_del_fromq(devinfo, req);
472 
473 	brcmf_proto_bcdc_txcomplete(devinfo->dev, req->skb, urb->status == 0);
474 	req->skb = NULL;
475 	brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount);
476 	spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
477 	if (devinfo->tx_freecount > devinfo->tx_high_watermark &&
478 		devinfo->tx_flowblock) {
479 		brcmf_proto_bcdc_txflowblock(devinfo->dev, false);
480 		devinfo->tx_flowblock = false;
481 	}
482 	spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
483 }
484 
485 static void brcmf_usb_rx_complete(struct urb *urb)
486 {
487 	struct brcmf_usbreq  *req = (struct brcmf_usbreq *)urb->context;
488 	struct brcmf_usbdev_info *devinfo = req->devinfo;
489 	struct sk_buff *skb;
490 
491 	brcmf_dbg(USB, "Enter, urb->status=%d\n", urb->status);
492 	brcmf_usb_del_fromq(devinfo, req);
493 	skb = req->skb;
494 	req->skb = NULL;
495 
496 	/* zero length packets indicate usb "failure". Do not refill */
497 	if (urb->status != 0 || !urb->actual_length) {
498 		brcmu_pkt_buf_free_skb(skb);
499 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
500 		return;
501 	}
502 
503 	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP) {
504 		skb_put(skb, urb->actual_length);
505 		brcmf_rx_frame(devinfo->dev, skb, true);
506 		brcmf_usb_rx_refill(devinfo, req);
507 	} else {
508 		brcmu_pkt_buf_free_skb(skb);
509 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
510 	}
511 	return;
512 
513 }
514 
515 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
516 				struct brcmf_usbreq  *req)
517 {
518 	struct sk_buff *skb;
519 	int ret;
520 
521 	if (!req || !devinfo)
522 		return;
523 
524 	skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu);
525 	if (!skb) {
526 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
527 		return;
528 	}
529 	req->skb = skb;
530 
531 	usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe,
532 			  skb->data, skb_tailroom(skb), brcmf_usb_rx_complete,
533 			  req);
534 	req->devinfo = devinfo;
535 	brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL);
536 
537 	ret = usb_submit_urb(req->urb, GFP_ATOMIC);
538 	if (ret) {
539 		brcmf_usb_del_fromq(devinfo, req);
540 		brcmu_pkt_buf_free_skb(req->skb);
541 		req->skb = NULL;
542 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
543 	}
544 	return;
545 }
546 
547 static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
548 {
549 	struct brcmf_usbreq *req;
550 
551 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
552 		brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state);
553 		return;
554 	}
555 	while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
556 		brcmf_usb_rx_refill(devinfo, req);
557 }
558 
559 static void
560 brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
561 {
562 	struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
563 
564 	brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n",
565 		  devinfo->bus_pub.state, state);
566 
567 	if (devinfo->bus_pub.state == state)
568 		return;
569 
570 	devinfo->bus_pub.state = state;
571 
572 	/* update state of upper layer */
573 	if (state == BRCMFMAC_USB_STATE_DOWN) {
574 		brcmf_dbg(USB, "DBUS is down\n");
575 		brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_DOWN);
576 	} else if (state == BRCMFMAC_USB_STATE_UP) {
577 		brcmf_dbg(USB, "DBUS is up\n");
578 		brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_UP);
579 	} else {
580 		brcmf_dbg(USB, "DBUS current state=%d\n", state);
581 	}
582 }
583 
584 static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
585 {
586 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
587 	struct brcmf_usbreq  *req;
588 	int ret;
589 	unsigned long flags;
590 
591 	brcmf_dbg(USB, "Enter, skb=%p\n", skb);
592 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
593 		ret = -EIO;
594 		goto fail;
595 	}
596 
597 	req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
598 					&devinfo->tx_freecount);
599 	if (!req) {
600 		brcmf_err("no req to send\n");
601 		ret = -ENOMEM;
602 		goto fail;
603 	}
604 
605 	req->skb = skb;
606 	req->devinfo = devinfo;
607 	usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
608 			  skb->data, skb->len, brcmf_usb_tx_complete, req);
609 	req->urb->transfer_flags |= URB_ZERO_PACKET;
610 	brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
611 	ret = usb_submit_urb(req->urb, GFP_ATOMIC);
612 	if (ret) {
613 		brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n");
614 		brcmf_usb_del_fromq(devinfo, req);
615 		req->skb = NULL;
616 		brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
617 			      &devinfo->tx_freecount);
618 		goto fail;
619 	}
620 
621 	spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
622 	if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
623 	    !devinfo->tx_flowblock) {
624 		brcmf_proto_bcdc_txflowblock(dev, true);
625 		devinfo->tx_flowblock = true;
626 	}
627 	spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
628 	return 0;
629 
630 fail:
631 	return ret;
632 }
633 
634 
635 static int brcmf_usb_up(struct device *dev)
636 {
637 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
638 
639 	brcmf_dbg(USB, "Enter\n");
640 	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP)
641 		return 0;
642 
643 	/* Success, indicate devinfo is fully up */
644 	brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_UP);
645 
646 	if (devinfo->ctl_urb) {
647 		devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0);
648 		devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0);
649 
650 		/* CTL Write */
651 		devinfo->ctl_write.bRequestType =
652 			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
653 		devinfo->ctl_write.bRequest = 0;
654 		devinfo->ctl_write.wValue = cpu_to_le16(0);
655 		devinfo->ctl_write.wIndex = cpu_to_le16(devinfo->ifnum);
656 
657 		/* CTL Read */
658 		devinfo->ctl_read.bRequestType =
659 			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
660 		devinfo->ctl_read.bRequest = 1;
661 		devinfo->ctl_read.wValue = cpu_to_le16(0);
662 		devinfo->ctl_read.wIndex = cpu_to_le16(devinfo->ifnum);
663 	}
664 	brcmf_usb_rx_fill_all(devinfo);
665 	return 0;
666 }
667 
668 static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo)
669 {
670 	int i;
671 
672 	if (devinfo->ctl_urb)
673 		usb_kill_urb(devinfo->ctl_urb);
674 	if (devinfo->bulk_urb)
675 		usb_kill_urb(devinfo->bulk_urb);
676 	if (devinfo->tx_reqs)
677 		for (i = 0; i < devinfo->bus_pub.ntxq; i++)
678 			usb_kill_urb(devinfo->tx_reqs[i].urb);
679 	if (devinfo->rx_reqs)
680 		for (i = 0; i < devinfo->bus_pub.nrxq; i++)
681 			usb_kill_urb(devinfo->rx_reqs[i].urb);
682 }
683 
684 static void brcmf_usb_down(struct device *dev)
685 {
686 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
687 
688 	brcmf_dbg(USB, "Enter\n");
689 	if (devinfo == NULL)
690 		return;
691 
692 	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_DOWN)
693 		return;
694 
695 	brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_DOWN);
696 
697 	brcmf_cancel_all_urbs(devinfo);
698 }
699 
700 static void
701 brcmf_usb_sync_complete(struct urb *urb)
702 {
703 	struct brcmf_usbdev_info *devinfo =
704 			(struct brcmf_usbdev_info *)urb->context;
705 
706 	devinfo->ctl_completed = true;
707 	brcmf_usb_ioctl_resp_wake(devinfo);
708 }
709 
710 static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
711 			    void *buffer, int buflen)
712 {
713 	int ret;
714 	char *tmpbuf;
715 	u16 size;
716 
717 	if ((!devinfo) || (devinfo->ctl_urb == NULL))
718 		return -EINVAL;
719 
720 	tmpbuf = kmalloc(buflen, GFP_ATOMIC);
721 	if (!tmpbuf)
722 		return -ENOMEM;
723 
724 	size = buflen;
725 	devinfo->ctl_urb->transfer_buffer_length = size;
726 
727 	devinfo->ctl_read.wLength = cpu_to_le16p(&size);
728 	devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
729 		USB_RECIP_INTERFACE;
730 	devinfo->ctl_read.bRequest = cmd;
731 
732 	usb_fill_control_urb(devinfo->ctl_urb,
733 		devinfo->usbdev,
734 		usb_rcvctrlpipe(devinfo->usbdev, 0),
735 		(unsigned char *) &devinfo->ctl_read,
736 		(void *) tmpbuf, size,
737 		(usb_complete_t)brcmf_usb_sync_complete, devinfo);
738 
739 	devinfo->ctl_completed = false;
740 	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
741 	if (ret < 0) {
742 		brcmf_err("usb_submit_urb failed %d\n", ret);
743 		goto finalize;
744 	}
745 
746 	if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
747 		usb_kill_urb(devinfo->ctl_urb);
748 		ret = -ETIMEDOUT;
749 	} else {
750 		memcpy(buffer, tmpbuf, buflen);
751 	}
752 
753 finalize:
754 	kfree(tmpbuf);
755 	return ret;
756 }
757 
758 static bool
759 brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
760 {
761 	struct bootrom_id_le id;
762 	u32 chipid, chiprev;
763 
764 	brcmf_dbg(USB, "Enter\n");
765 
766 	if (devinfo == NULL)
767 		return false;
768 
769 	/* Check if firmware downloaded already by querying runtime ID */
770 	id.chip = cpu_to_le32(0xDEAD);
771 	brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
772 
773 	chipid = le32_to_cpu(id.chip);
774 	chiprev = le32_to_cpu(id.chiprev);
775 
776 	if ((chipid & 0x4300) == 0x4300)
777 		brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev);
778 	else
779 		brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev);
780 	if (chipid == BRCMF_POSTBOOT_ID) {
781 		brcmf_dbg(USB, "firmware already downloaded\n");
782 		brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
783 		return false;
784 	} else {
785 		devinfo->bus_pub.devid = chipid;
786 		devinfo->bus_pub.chiprev = chiprev;
787 	}
788 	return true;
789 }
790 
791 static int
792 brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
793 {
794 	struct bootrom_id_le id;
795 	u32 loop_cnt;
796 	int err;
797 
798 	brcmf_dbg(USB, "Enter\n");
799 
800 	loop_cnt = 0;
801 	do {
802 		mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT);
803 		loop_cnt++;
804 		id.chip = cpu_to_le32(0xDEAD);       /* Get the ID */
805 		err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
806 		if ((err) && (err != -ETIMEDOUT))
807 			return err;
808 		if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
809 			break;
810 	} while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT);
811 
812 	if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
813 		brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n",
814 			  le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
815 
816 		brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
817 		return 0;
818 	} else {
819 		brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n",
820 			  BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt);
821 		return -EINVAL;
822 	}
823 }
824 
825 
826 static int
827 brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
828 {
829 	int ret;
830 
831 	if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
832 		return -EINVAL;
833 
834 	/* Prepare the URB */
835 	usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
836 			  devinfo->tx_pipe, buffer, len,
837 			  (usb_complete_t)brcmf_usb_sync_complete, devinfo);
838 
839 	devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
840 
841 	devinfo->ctl_completed = false;
842 	ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
843 	if (ret) {
844 		brcmf_err("usb_submit_urb failed %d\n", ret);
845 		return ret;
846 	}
847 	ret = brcmf_usb_ioctl_resp_wait(devinfo);
848 	return (ret == 0);
849 }
850 
851 static int
852 brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
853 {
854 	unsigned int sendlen, sent, dllen;
855 	char *bulkchunk = NULL, *dlpos;
856 	struct rdl_state_le state;
857 	u32 rdlstate, rdlbytes;
858 	int err = 0;
859 
860 	brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen);
861 
862 	bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC);
863 	if (bulkchunk == NULL) {
864 		err = -ENOMEM;
865 		goto fail;
866 	}
867 
868 	/* 1) Prepare USB boot loader for runtime image */
869 	brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state));
870 
871 	rdlstate = le32_to_cpu(state.state);
872 	rdlbytes = le32_to_cpu(state.bytes);
873 
874 	/* 2) Check we are in the Waiting state */
875 	if (rdlstate != DL_WAITING) {
876 		brcmf_err("Failed to DL_START\n");
877 		err = -EINVAL;
878 		goto fail;
879 	}
880 	sent = 0;
881 	dlpos = fw;
882 	dllen = fwlen;
883 
884 	/* Get chip id and rev */
885 	while (rdlbytes != dllen) {
886 		/* Wait until the usb device reports it received all
887 		 * the bytes we sent */
888 		if ((rdlbytes == sent) && (rdlbytes != dllen)) {
889 			if ((dllen-sent) < TRX_RDL_CHUNK)
890 				sendlen = dllen-sent;
891 			else
892 				sendlen = TRX_RDL_CHUNK;
893 
894 			/* simply avoid having to send a ZLP by ensuring we
895 			 * never have an even
896 			 * multiple of 64
897 			 */
898 			if (!(sendlen % 64))
899 				sendlen -= 4;
900 
901 			/* send data */
902 			memcpy(bulkchunk, dlpos, sendlen);
903 			if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
904 						   sendlen)) {
905 				brcmf_err("send_bulk failed\n");
906 				err = -EINVAL;
907 				goto fail;
908 			}
909 
910 			dlpos += sendlen;
911 			sent += sendlen;
912 		}
913 		err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
914 				       sizeof(state));
915 		if (err) {
916 			brcmf_err("DL_GETSTATE Failed\n");
917 			goto fail;
918 		}
919 
920 		rdlstate = le32_to_cpu(state.state);
921 		rdlbytes = le32_to_cpu(state.bytes);
922 
923 		/* restart if an error is reported */
924 		if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
925 			brcmf_err("Bad Hdr or Bad CRC state %d\n",
926 				  rdlstate);
927 			err = -EINVAL;
928 			goto fail;
929 		}
930 	}
931 
932 fail:
933 	kfree(bulkchunk);
934 	brcmf_dbg(USB, "Exit, err=%d\n", err);
935 	return err;
936 }
937 
938 static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
939 {
940 	int err;
941 
942 	brcmf_dbg(USB, "Enter\n");
943 
944 	if (devinfo == NULL)
945 		return -EINVAL;
946 
947 	if (devinfo->bus_pub.devid == 0xDEAD)
948 		return -EINVAL;
949 
950 	err = brcmf_usb_dl_writeimage(devinfo, fw, len);
951 	if (err == 0)
952 		devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE;
953 	else
954 		devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL;
955 	brcmf_dbg(USB, "Exit, err=%d\n", err);
956 
957 	return err;
958 }
959 
960 static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
961 {
962 	struct rdl_state_le state;
963 
964 	brcmf_dbg(USB, "Enter\n");
965 	if (!devinfo)
966 		return -EINVAL;
967 
968 	if (devinfo->bus_pub.devid == 0xDEAD)
969 		return -EINVAL;
970 
971 	/* Check we are runnable */
972 	state.state = 0;
973 	brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state));
974 
975 	/* Start the image */
976 	if (state.state == cpu_to_le32(DL_RUNNABLE)) {
977 		if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state)))
978 			return -ENODEV;
979 		if (brcmf_usb_resetcfg(devinfo))
980 			return -ENODEV;
981 		/* The Dongle may go for re-enumeration. */
982 	} else {
983 		brcmf_err("Dongle not runnable\n");
984 		return -EINVAL;
985 	}
986 	brcmf_dbg(USB, "Exit\n");
987 	return 0;
988 }
989 
990 static int
991 brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
992 {
993 	int err;
994 
995 	brcmf_dbg(USB, "Enter\n");
996 	if (devinfo == NULL)
997 		return -ENODEV;
998 
999 	if (!devinfo->image) {
1000 		brcmf_err("No firmware!\n");
1001 		return -ENOENT;
1002 	}
1003 
1004 	err = brcmf_usb_dlstart(devinfo,
1005 		(u8 *)devinfo->image, devinfo->image_len);
1006 	if (err == 0)
1007 		err = brcmf_usb_dlrun(devinfo);
1008 	return err;
1009 }
1010 
1011 
1012 static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1013 {
1014 	brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
1015 
1016 	/* free the URBS */
1017 	brcmf_usb_free_q(&devinfo->rx_freeq);
1018 	brcmf_usb_free_q(&devinfo->tx_freeq);
1019 
1020 	usb_free_urb(devinfo->ctl_urb);
1021 	usb_free_urb(devinfo->bulk_urb);
1022 
1023 	kfree(devinfo->tx_reqs);
1024 	kfree(devinfo->rx_reqs);
1025 
1026 	if (devinfo->settings)
1027 		brcmf_release_module_param(devinfo->settings);
1028 }
1029 
1030 
1031 static int check_file(const u8 *headers)
1032 {
1033 	struct trx_header_le *trx;
1034 	int actual_len = -1;
1035 
1036 	brcmf_dbg(USB, "Enter\n");
1037 	/* Extract trx header */
1038 	trx = (struct trx_header_le *) headers;
1039 	if (trx->magic != cpu_to_le32(TRX_MAGIC))
1040 		return -1;
1041 
1042 	headers += sizeof(struct trx_header_le);
1043 
1044 	if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1045 		actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1046 		return actual_len + sizeof(struct trx_header_le);
1047 	}
1048 	return -1;
1049 }
1050 
1051 
1052 static
1053 struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1054 				      int nrxq, int ntxq)
1055 {
1056 	brcmf_dbg(USB, "Enter\n");
1057 
1058 	devinfo->bus_pub.nrxq = nrxq;
1059 	devinfo->rx_low_watermark = nrxq / 2;
1060 	devinfo->bus_pub.devinfo = devinfo;
1061 	devinfo->bus_pub.ntxq = ntxq;
1062 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN;
1063 
1064 	/* flow control when too many tx urbs posted */
1065 	devinfo->tx_low_watermark = ntxq / 4;
1066 	devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1067 	devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1068 
1069 	/* Initialize other structure content */
1070 	init_waitqueue_head(&devinfo->ioctl_resp_wait);
1071 
1072 	/* Initialize the spinlocks */
1073 	spin_lock_init(&devinfo->qlock);
1074 	spin_lock_init(&devinfo->tx_flowblock_lock);
1075 
1076 	INIT_LIST_HEAD(&devinfo->rx_freeq);
1077 	INIT_LIST_HEAD(&devinfo->rx_postq);
1078 
1079 	INIT_LIST_HEAD(&devinfo->tx_freeq);
1080 	INIT_LIST_HEAD(&devinfo->tx_postq);
1081 
1082 	devinfo->tx_flowblock = false;
1083 
1084 	devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1085 	if (!devinfo->rx_reqs)
1086 		goto error;
1087 
1088 	devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1089 	if (!devinfo->tx_reqs)
1090 		goto error;
1091 	devinfo->tx_freecount = ntxq;
1092 
1093 	devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1094 	if (!devinfo->ctl_urb)
1095 		goto error;
1096 	devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1097 	if (!devinfo->bulk_urb)
1098 		goto error;
1099 
1100 	return &devinfo->bus_pub;
1101 
1102 error:
1103 	brcmf_err("failed!\n");
1104 	brcmf_usb_detach(devinfo);
1105 	return NULL;
1106 }
1107 
1108 static void brcmf_usb_wowl_config(struct device *dev, bool enabled)
1109 {
1110 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
1111 
1112 	brcmf_dbg(USB, "Configuring WOWL, enabled=%d\n", enabled);
1113 	devinfo->wowl_enabled = enabled;
1114 	if (enabled)
1115 		device_set_wakeup_enable(devinfo->dev, true);
1116 	else
1117 		device_set_wakeup_enable(devinfo->dev, false);
1118 }
1119 
1120 static
1121 int brcmf_usb_get_fwname(struct device *dev, const char *ext, u8 *fw_name)
1122 {
1123 	struct brcmf_bus *bus = dev_get_drvdata(dev);
1124 	struct brcmf_fw_request *fwreq;
1125 	struct brcmf_fw_name fwnames[] = {
1126 		{ ext, fw_name },
1127 	};
1128 
1129 	fwreq = brcmf_fw_alloc_request(bus->chip, bus->chiprev,
1130 				       brcmf_usb_fwnames,
1131 				       ARRAY_SIZE(brcmf_usb_fwnames),
1132 				       fwnames, ARRAY_SIZE(fwnames));
1133 	if (!fwreq)
1134 		return -ENOMEM;
1135 
1136 	kfree(fwreq);
1137 	return 0;
1138 }
1139 
1140 static const struct brcmf_bus_ops brcmf_usb_bus_ops = {
1141 	.preinit = brcmf_usb_up,
1142 	.stop = brcmf_usb_down,
1143 	.txdata = brcmf_usb_tx,
1144 	.txctl = brcmf_usb_tx_ctlpkt,
1145 	.rxctl = brcmf_usb_rx_ctlpkt,
1146 	.wowl_config = brcmf_usb_wowl_config,
1147 	.get_fwname = brcmf_usb_get_fwname,
1148 };
1149 
1150 #define BRCMF_USB_FW_CODE	0
1151 
1152 static void brcmf_usb_probe_phase2(struct device *dev, int ret,
1153 				   struct brcmf_fw_request *fwreq)
1154 {
1155 	struct brcmf_bus *bus = dev_get_drvdata(dev);
1156 	struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
1157 	const struct firmware *fw;
1158 
1159 	if (ret)
1160 		goto error;
1161 
1162 	brcmf_dbg(USB, "Start fw downloading\n");
1163 
1164 	fw = fwreq->items[BRCMF_USB_FW_CODE].binary;
1165 	kfree(fwreq);
1166 
1167 	ret = check_file(fw->data);
1168 	if (ret < 0) {
1169 		brcmf_err("invalid firmware\n");
1170 		release_firmware(fw);
1171 		goto error;
1172 	}
1173 
1174 	devinfo->image = fw->data;
1175 	devinfo->image_len = fw->size;
1176 
1177 	ret = brcmf_usb_fw_download(devinfo);
1178 	release_firmware(fw);
1179 	if (ret)
1180 		goto error;
1181 
1182 	ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1183 	if (ret)
1184 		goto error;
1185 
1186 	/* Attach to the common driver interface */
1187 	ret = brcmf_attach(devinfo->dev);
1188 	if (ret)
1189 		goto error;
1190 
1191 	complete(&devinfo->dev_init_done);
1192 	return;
1193 error:
1194 	brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
1195 	complete(&devinfo->dev_init_done);
1196 	device_release_driver(dev);
1197 }
1198 
1199 static struct brcmf_fw_request *
1200 brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info *devinfo)
1201 {
1202 	struct brcmf_fw_request *fwreq;
1203 	struct brcmf_fw_name fwnames[] = {
1204 		{ ".bin", devinfo->fw_name },
1205 	};
1206 
1207 	fwreq = brcmf_fw_alloc_request(devinfo->bus_pub.devid,
1208 				       devinfo->bus_pub.chiprev,
1209 				       brcmf_usb_fwnames,
1210 				       ARRAY_SIZE(brcmf_usb_fwnames),
1211 				       fwnames, ARRAY_SIZE(fwnames));
1212 	if (!fwreq)
1213 		return NULL;
1214 
1215 	fwreq->items[BRCMF_USB_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
1216 
1217 	return fwreq;
1218 }
1219 
1220 static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo)
1221 {
1222 	struct brcmf_bus *bus = NULL;
1223 	struct brcmf_usbdev *bus_pub = NULL;
1224 	struct device *dev = devinfo->dev;
1225 	struct brcmf_fw_request *fwreq;
1226 	int ret;
1227 
1228 	brcmf_dbg(USB, "Enter\n");
1229 	bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1230 	if (!bus_pub)
1231 		return -ENODEV;
1232 
1233 	bus = kzalloc(sizeof(struct brcmf_bus), GFP_ATOMIC);
1234 	if (!bus) {
1235 		ret = -ENOMEM;
1236 		goto fail;
1237 	}
1238 
1239 	bus->dev = dev;
1240 	bus_pub->bus = bus;
1241 	bus->bus_priv.usb = bus_pub;
1242 	dev_set_drvdata(dev, bus);
1243 	bus->ops = &brcmf_usb_bus_ops;
1244 	bus->proto_type = BRCMF_PROTO_BCDC;
1245 	bus->always_use_fws_queue = true;
1246 #ifdef CONFIG_PM
1247 	bus->wowl_supported = true;
1248 #endif
1249 
1250 	devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB,
1251 						   bus_pub->devid,
1252 						   bus_pub->chiprev);
1253 	if (!devinfo->settings) {
1254 		ret = -ENOMEM;
1255 		goto fail;
1256 	}
1257 
1258 	if (!brcmf_usb_dlneeded(devinfo)) {
1259 		ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1260 		if (ret)
1261 			goto fail;
1262 		ret = brcmf_attach(devinfo->dev);
1263 		if (ret)
1264 			goto fail;
1265 		/* we are done */
1266 		complete(&devinfo->dev_init_done);
1267 		return 0;
1268 	}
1269 	bus->chip = bus_pub->devid;
1270 	bus->chiprev = bus_pub->chiprev;
1271 
1272 	fwreq = brcmf_usb_prepare_fw_request(devinfo);
1273 	if (!fwreq) {
1274 		ret = -ENOMEM;
1275 		goto fail;
1276 	}
1277 
1278 	/* request firmware here */
1279 	ret = brcmf_fw_get_firmwares(dev, fwreq, brcmf_usb_probe_phase2);
1280 	if (ret) {
1281 		brcmf_err("firmware request failed: %d\n", ret);
1282 		kfree(fwreq);
1283 		goto fail;
1284 	}
1285 
1286 	return 0;
1287 
1288 fail:
1289 	/* Release resources in reverse order */
1290 	brcmf_free(devinfo->dev);
1291 	kfree(bus);
1292 	brcmf_usb_detach(devinfo);
1293 	return ret;
1294 }
1295 
1296 static void
1297 brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1298 {
1299 	if (!devinfo)
1300 		return;
1301 	brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
1302 
1303 	brcmf_detach(devinfo->dev);
1304 	brcmf_free(devinfo->dev);
1305 	kfree(devinfo->bus_pub.bus);
1306 	brcmf_usb_detach(devinfo);
1307 }
1308 
1309 static int
1310 brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1311 {
1312 	struct usb_device *usb = interface_to_usbdev(intf);
1313 	struct brcmf_usbdev_info *devinfo;
1314 	struct usb_interface_descriptor	*desc;
1315 	struct usb_endpoint_descriptor *endpoint;
1316 	int ret = 0;
1317 	u32 num_of_eps;
1318 	u8 endpoint_num, ep;
1319 
1320 	brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct);
1321 
1322 	devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1323 	if (devinfo == NULL)
1324 		return -ENOMEM;
1325 
1326 	devinfo->usbdev = usb;
1327 	devinfo->dev = &usb->dev;
1328 	/* Init completion, to protect for disconnect while still loading.
1329 	 * Necessary because of the asynchronous firmware load construction
1330 	 */
1331 	init_completion(&devinfo->dev_init_done);
1332 
1333 	usb_set_intfdata(intf, devinfo);
1334 
1335 	/* Check that the device supports only one configuration */
1336 	if (usb->descriptor.bNumConfigurations != 1) {
1337 		brcmf_err("Number of configurations: %d not supported\n",
1338 			  usb->descriptor.bNumConfigurations);
1339 		ret = -ENODEV;
1340 		goto fail;
1341 	}
1342 
1343 	if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) &&
1344 	    (usb->descriptor.bDeviceClass != USB_CLASS_MISC) &&
1345 	    (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) {
1346 		brcmf_err("Device class: 0x%x not supported\n",
1347 			  usb->descriptor.bDeviceClass);
1348 		ret = -ENODEV;
1349 		goto fail;
1350 	}
1351 
1352 	desc = &intf->cur_altsetting->desc;
1353 	if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1354 	    (desc->bInterfaceSubClass != 2) ||
1355 	    (desc->bInterfaceProtocol != 0xff)) {
1356 		brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n",
1357 			  desc->bInterfaceNumber, desc->bInterfaceClass,
1358 			  desc->bInterfaceSubClass, desc->bInterfaceProtocol);
1359 		ret = -ENODEV;
1360 		goto fail;
1361 	}
1362 
1363 	num_of_eps = desc->bNumEndpoints;
1364 	for (ep = 0; ep < num_of_eps; ep++) {
1365 		endpoint = &intf->cur_altsetting->endpoint[ep].desc;
1366 		endpoint_num = usb_endpoint_num(endpoint);
1367 		if (!usb_endpoint_xfer_bulk(endpoint))
1368 			continue;
1369 		if (usb_endpoint_dir_in(endpoint)) {
1370 			if (!devinfo->rx_pipe)
1371 				devinfo->rx_pipe =
1372 					usb_rcvbulkpipe(usb, endpoint_num);
1373 		} else {
1374 			if (!devinfo->tx_pipe)
1375 				devinfo->tx_pipe =
1376 					usb_sndbulkpipe(usb, endpoint_num);
1377 		}
1378 	}
1379 	if (devinfo->rx_pipe == 0) {
1380 		brcmf_err("No RX (in) Bulk EP found\n");
1381 		ret = -ENODEV;
1382 		goto fail;
1383 	}
1384 	if (devinfo->tx_pipe == 0) {
1385 		brcmf_err("No TX (out) Bulk EP found\n");
1386 		ret = -ENODEV;
1387 		goto fail;
1388 	}
1389 
1390 	devinfo->ifnum = desc->bInterfaceNumber;
1391 
1392 	if (usb->speed == USB_SPEED_SUPER_PLUS)
1393 		brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n");
1394 	else if (usb->speed == USB_SPEED_SUPER)
1395 		brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n");
1396 	else if (usb->speed == USB_SPEED_HIGH)
1397 		brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n");
1398 	else
1399 		brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n");
1400 
1401 	ret = brcmf_usb_probe_cb(devinfo);
1402 	if (ret)
1403 		goto fail;
1404 
1405 	/* Success */
1406 	return 0;
1407 
1408 fail:
1409 	complete(&devinfo->dev_init_done);
1410 	kfree(devinfo);
1411 	usb_set_intfdata(intf, NULL);
1412 	return ret;
1413 }
1414 
1415 static void
1416 brcmf_usb_disconnect(struct usb_interface *intf)
1417 {
1418 	struct brcmf_usbdev_info *devinfo;
1419 
1420 	brcmf_dbg(USB, "Enter\n");
1421 	devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1422 
1423 	if (devinfo) {
1424 		wait_for_completion(&devinfo->dev_init_done);
1425 		/* Make sure that devinfo still exists. Firmware probe routines
1426 		 * may have released the device and cleared the intfdata.
1427 		 */
1428 		if (!usb_get_intfdata(intf))
1429 			goto done;
1430 
1431 		brcmf_usb_disconnect_cb(devinfo);
1432 		kfree(devinfo);
1433 	}
1434 done:
1435 	brcmf_dbg(USB, "Exit\n");
1436 }
1437 
1438 /*
1439  * only need to signal the bus being down and update the state.
1440  */
1441 static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1442 {
1443 	struct usb_device *usb = interface_to_usbdev(intf);
1444 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1445 
1446 	brcmf_dbg(USB, "Enter\n");
1447 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
1448 	if (devinfo->wowl_enabled) {
1449 		brcmf_cancel_all_urbs(devinfo);
1450 	} else {
1451 		brcmf_detach(&usb->dev);
1452 		brcmf_free(&usb->dev);
1453 	}
1454 	return 0;
1455 }
1456 
1457 /*
1458  * (re-) start the bus.
1459  */
1460 static int brcmf_usb_resume(struct usb_interface *intf)
1461 {
1462 	struct usb_device *usb = interface_to_usbdev(intf);
1463 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1464 
1465 	brcmf_dbg(USB, "Enter\n");
1466 	if (!devinfo->wowl_enabled) {
1467 		int err;
1468 
1469 		err = brcmf_alloc(&usb->dev, devinfo->settings);
1470 		if (err)
1471 			return err;
1472 
1473 		err = brcmf_attach(devinfo->dev);
1474 		if (err) {
1475 			brcmf_free(devinfo->dev);
1476 			return err;
1477 		}
1478 	}
1479 
1480 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
1481 	brcmf_usb_rx_fill_all(devinfo);
1482 	return 0;
1483 }
1484 
1485 static int brcmf_usb_reset_resume(struct usb_interface *intf)
1486 {
1487 	struct usb_device *usb = interface_to_usbdev(intf);
1488 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1489 	struct brcmf_fw_request *fwreq;
1490 	int ret;
1491 
1492 	brcmf_dbg(USB, "Enter\n");
1493 
1494 	fwreq = brcmf_usb_prepare_fw_request(devinfo);
1495 	if (!fwreq)
1496 		return -ENOMEM;
1497 
1498 	ret = brcmf_fw_get_firmwares(&usb->dev, fwreq, brcmf_usb_probe_phase2);
1499 	if (ret < 0)
1500 		kfree(fwreq);
1501 
1502 	return ret;
1503 }
1504 
1505 #define BRCMF_USB_DEVICE(dev_id)	\
1506 	{ USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id) }
1507 
1508 #define LINKSYS_USB_DEVICE(dev_id)	\
1509 	{ USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id) }
1510 
1511 #define CYPRESS_USB_DEVICE(dev_id)	\
1512 	{ USB_DEVICE(CY_USB_VENDOR_ID_CYPRESS, dev_id) }
1513 
1514 static const struct usb_device_id brcmf_usb_devid_table[] = {
1515 	BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID),
1516 	BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID),
1517 	BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID),
1518 	BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID),
1519 	LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID),
1520 	CYPRESS_USB_DEVICE(CY_USB_4373_DEVICE_ID),
1521 	{ USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) },
1522 	/* special entry for device with firmware loaded and running */
1523 	BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1524 	CYPRESS_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1525 	{ /* end: all zeroes */ }
1526 };
1527 
1528 MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1529 
1530 static struct usb_driver brcmf_usbdrvr = {
1531 	.name = KBUILD_MODNAME,
1532 	.probe = brcmf_usb_probe,
1533 	.disconnect = brcmf_usb_disconnect,
1534 	.id_table = brcmf_usb_devid_table,
1535 	.suspend = brcmf_usb_suspend,
1536 	.resume = brcmf_usb_resume,
1537 	.reset_resume = brcmf_usb_reset_resume,
1538 	.disable_hub_initiated_lpm = 1,
1539 };
1540 
1541 static int brcmf_usb_reset_device(struct device *dev, void *notused)
1542 {
1543 	/* device past is the usb interface so we
1544 	 * need to use parent here.
1545 	 */
1546 	brcmf_dev_reset(dev->parent);
1547 	return 0;
1548 }
1549 
1550 void brcmf_usb_exit(void)
1551 {
1552 	struct device_driver *drv = &brcmf_usbdrvr.drvwrap.driver;
1553 	int ret;
1554 
1555 	brcmf_dbg(USB, "Enter\n");
1556 	ret = driver_for_each_device(drv, NULL, NULL,
1557 				     brcmf_usb_reset_device);
1558 	usb_deregister(&brcmf_usbdrvr);
1559 }
1560 
1561 void brcmf_usb_register(void)
1562 {
1563 	int ret;
1564 
1565 	brcmf_dbg(USB, "Enter\n");
1566 	ret = usb_register(&brcmf_usbdrvr);
1567 	if (ret)
1568 		brcmf_err("usb_register failed %d\n", ret);
1569 }
1570