xref: /linux/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c (revision 8be4d31cb8aaeea27bde4b7ddb26e28a89062ebf)
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_usbdev_info {
121 	struct brcmf_usbdev bus_pub; /* MUST BE FIRST */
122 	spinlock_t qlock;
123 	struct list_head rx_freeq;
124 	struct list_head rx_postq;
125 	struct list_head tx_freeq;
126 	struct list_head tx_postq;
127 	uint rx_pipe, tx_pipe;
128 
129 	int rx_low_watermark;
130 	int tx_low_watermark;
131 	int tx_high_watermark;
132 	int tx_freecount;
133 	bool tx_flowblock;
134 	spinlock_t tx_flowblock_lock;
135 
136 	struct brcmf_usbreq *tx_reqs;
137 	struct brcmf_usbreq *rx_reqs;
138 
139 	char fw_name[BRCMF_FW_NAME_LEN];
140 	const u8 *image;	/* buffer for combine fw and nvram */
141 	int image_len;
142 
143 	struct usb_device *usbdev;
144 	struct device *dev;
145 	struct completion dev_init_done;
146 
147 	int ctl_in_pipe, ctl_out_pipe;
148 	struct urb *ctl_urb; /* URB for control endpoint */
149 	struct usb_ctrlrequest ctl_write;
150 	struct usb_ctrlrequest ctl_read;
151 	u32 ctl_urb_actual_length;
152 	int ctl_urb_status;
153 	int ctl_completed;
154 	wait_queue_head_t ioctl_resp_wait;
155 	ulong ctl_op;
156 	u8 ifnum;
157 
158 	struct urb *bulk_urb; /* used for FW download */
159 
160 	struct brcmf_mp_device *settings;
161 };
162 
163 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
164 				struct brcmf_usbreq  *req);
165 
brcmf_usb_get_buspub(struct device * dev)166 static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev)
167 {
168 	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
169 	return bus_if->bus_priv.usb;
170 }
171 
brcmf_usb_get_businfo(struct device * dev)172 static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev)
173 {
174 	return brcmf_usb_get_buspub(dev)->devinfo;
175 }
176 
brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info * devinfo)177 static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo)
178 {
179 	return wait_event_timeout(devinfo->ioctl_resp_wait,
180 				  devinfo->ctl_completed, IOCTL_RESP_TIMEOUT);
181 }
182 
brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info * devinfo)183 static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo)
184 {
185 	wake_up(&devinfo->ioctl_resp_wait);
186 }
187 
188 static void
brcmf_usb_ctl_complete(struct brcmf_usbdev_info * devinfo,int type,int status)189 brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status)
190 {
191 	brcmf_dbg(USB, "Enter, status=%d\n", status);
192 
193 	if (unlikely(devinfo == NULL))
194 		return;
195 
196 	if (type == BRCMF_USB_CBCTL_READ) {
197 		if (status == 0)
198 			devinfo->bus_pub.stats.rx_ctlpkts++;
199 		else
200 			devinfo->bus_pub.stats.rx_ctlerrs++;
201 	} else if (type == BRCMF_USB_CBCTL_WRITE) {
202 		if (status == 0)
203 			devinfo->bus_pub.stats.tx_ctlpkts++;
204 		else
205 			devinfo->bus_pub.stats.tx_ctlerrs++;
206 	}
207 
208 	devinfo->ctl_urb_status = status;
209 	devinfo->ctl_completed = true;
210 	brcmf_usb_ioctl_resp_wake(devinfo);
211 }
212 
213 static void
brcmf_usb_ctlread_complete(struct urb * urb)214 brcmf_usb_ctlread_complete(struct urb *urb)
215 {
216 	struct brcmf_usbdev_info *devinfo =
217 		(struct brcmf_usbdev_info *)urb->context;
218 
219 	brcmf_dbg(USB, "Enter\n");
220 	devinfo->ctl_urb_actual_length = urb->actual_length;
221 	brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ,
222 		urb->status);
223 }
224 
225 static void
brcmf_usb_ctlwrite_complete(struct urb * urb)226 brcmf_usb_ctlwrite_complete(struct urb *urb)
227 {
228 	struct brcmf_usbdev_info *devinfo =
229 		(struct brcmf_usbdev_info *)urb->context;
230 
231 	brcmf_dbg(USB, "Enter\n");
232 	brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE,
233 		urb->status);
234 }
235 
236 static int
brcmf_usb_send_ctl(struct brcmf_usbdev_info * devinfo,u8 * buf,int len)237 brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
238 {
239 	int ret;
240 	u16 size;
241 
242 	brcmf_dbg(USB, "Enter\n");
243 	if (devinfo == NULL || buf == NULL ||
244 	    len == 0 || devinfo->ctl_urb == NULL)
245 		return -EINVAL;
246 
247 	size = len;
248 	devinfo->ctl_write.wLength = cpu_to_le16p(&size);
249 	devinfo->ctl_urb->transfer_buffer_length = size;
250 	devinfo->ctl_urb_status = 0;
251 	devinfo->ctl_urb_actual_length = 0;
252 
253 	usb_fill_control_urb(devinfo->ctl_urb,
254 		devinfo->usbdev,
255 		devinfo->ctl_out_pipe,
256 		(unsigned char *) &devinfo->ctl_write,
257 		buf, size,
258 		(usb_complete_t)brcmf_usb_ctlwrite_complete,
259 		devinfo);
260 
261 	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
262 	if (ret < 0)
263 		brcmf_err("usb_submit_urb failed %d\n", ret);
264 
265 	return ret;
266 }
267 
268 static int
brcmf_usb_recv_ctl(struct brcmf_usbdev_info * devinfo,u8 * buf,int len)269 brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
270 {
271 	int ret;
272 	u16 size;
273 
274 	brcmf_dbg(USB, "Enter\n");
275 	if ((devinfo == NULL) || (buf == NULL) || (len == 0)
276 		|| (devinfo->ctl_urb == NULL))
277 		return -EINVAL;
278 
279 	size = len;
280 	devinfo->ctl_read.wLength = cpu_to_le16p(&size);
281 	devinfo->ctl_urb->transfer_buffer_length = size;
282 
283 	devinfo->ctl_read.bRequestType = USB_DIR_IN
284 		| USB_TYPE_CLASS | USB_RECIP_INTERFACE;
285 	devinfo->ctl_read.bRequest = 1;
286 
287 	usb_fill_control_urb(devinfo->ctl_urb,
288 		devinfo->usbdev,
289 		devinfo->ctl_in_pipe,
290 		(unsigned char *) &devinfo->ctl_read,
291 		buf, size,
292 		(usb_complete_t)brcmf_usb_ctlread_complete,
293 		devinfo);
294 
295 	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
296 	if (ret < 0)
297 		brcmf_err("usb_submit_urb failed %d\n", ret);
298 
299 	return ret;
300 }
301 
brcmf_usb_tx_ctlpkt(struct device * dev,u8 * buf,u32 len)302 static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len)
303 {
304 	int err = 0;
305 	int timeout = 0;
306 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
307 	struct usb_interface *intf = to_usb_interface(dev);
308 
309 	brcmf_dbg(USB, "Enter\n");
310 
311 	err = usb_autopm_get_interface(intf);
312 	if (err)
313 		goto out;
314 
315 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
316 		err = -EIO;
317 		goto fail;
318 	}
319 
320 	if (test_and_set_bit(0, &devinfo->ctl_op)) {
321 		err = -EIO;
322 		goto fail;
323 	}
324 
325 	devinfo->ctl_completed = false;
326 	err = brcmf_usb_send_ctl(devinfo, buf, len);
327 	if (err) {
328 		brcmf_err("fail %d bytes: %d\n", err, len);
329 		clear_bit(0, &devinfo->ctl_op);
330 		goto fail;
331 	}
332 	timeout = brcmf_usb_ioctl_resp_wait(devinfo);
333 	if (!timeout) {
334 		brcmf_err("Txctl wait timed out\n");
335 		usb_kill_urb(devinfo->ctl_urb);
336 		err = -EIO;
337 		goto fail;
338 	}
339 	clear_bit(0, &devinfo->ctl_op);
340 
341 fail:
342 	usb_autopm_put_interface(intf);
343 out:
344 	return err;
345 }
346 
brcmf_usb_rx_ctlpkt(struct device * dev,u8 * buf,u32 len)347 static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len)
348 {
349 	int err = 0;
350 	int timeout = 0;
351 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
352 	struct usb_interface *intf = to_usb_interface(dev);
353 
354 	brcmf_dbg(USB, "Enter\n");
355 
356 	err = usb_autopm_get_interface(intf);
357 	if (err)
358 		goto out;
359 
360 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
361 		err = -EIO;
362 		goto fail;
363 	}
364 
365 	if (test_and_set_bit(0, &devinfo->ctl_op)) {
366 		err = -EIO;
367 		goto fail;
368 	}
369 
370 	devinfo->ctl_completed = false;
371 	err = brcmf_usb_recv_ctl(devinfo, buf, len);
372 	if (err) {
373 		brcmf_err("fail %d bytes: %d\n", err, len);
374 		clear_bit(0, &devinfo->ctl_op);
375 		goto fail;
376 	}
377 	timeout = brcmf_usb_ioctl_resp_wait(devinfo);
378 	err = devinfo->ctl_urb_status;
379 	if (!timeout) {
380 		brcmf_err("rxctl wait timed out\n");
381 		usb_kill_urb(devinfo->ctl_urb);
382 		err = -EIO;
383 		goto fail;
384 	}
385 	clear_bit(0, &devinfo->ctl_op);
386 fail:
387 	usb_autopm_put_interface(intf);
388 	if (!err)
389 		return devinfo->ctl_urb_actual_length;
390 out:
391 	return err;
392 }
393 
brcmf_usb_deq(struct brcmf_usbdev_info * devinfo,struct list_head * q,int * counter)394 static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo,
395 					  struct list_head *q, int *counter)
396 {
397 	unsigned long flags;
398 	struct brcmf_usbreq  *req;
399 	spin_lock_irqsave(&devinfo->qlock, flags);
400 	if (list_empty(q)) {
401 		spin_unlock_irqrestore(&devinfo->qlock, flags);
402 		return NULL;
403 	}
404 	req = list_entry(q->next, struct brcmf_usbreq, list);
405 	list_del_init(q->next);
406 	if (counter)
407 		(*counter)--;
408 	spin_unlock_irqrestore(&devinfo->qlock, flags);
409 	return req;
410 
411 }
412 
brcmf_usb_enq(struct brcmf_usbdev_info * devinfo,struct list_head * q,struct brcmf_usbreq * req,int * counter)413 static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo,
414 			  struct list_head *q, struct brcmf_usbreq *req,
415 			  int *counter)
416 {
417 	unsigned long flags;
418 	spin_lock_irqsave(&devinfo->qlock, flags);
419 	list_add_tail(&req->list, q);
420 	if (counter)
421 		(*counter)++;
422 	spin_unlock_irqrestore(&devinfo->qlock, flags);
423 }
424 
425 static struct brcmf_usbreq *
brcmf_usbdev_qinit(struct list_head * q,int qsize)426 brcmf_usbdev_qinit(struct list_head *q, int qsize)
427 {
428 	int i;
429 	struct brcmf_usbreq *req, *reqs;
430 
431 	reqs = kcalloc(qsize, sizeof(struct brcmf_usbreq), GFP_ATOMIC);
432 	if (reqs == NULL)
433 		return NULL;
434 
435 	req = reqs;
436 
437 	for (i = 0; i < qsize; i++) {
438 		req->urb = usb_alloc_urb(0, GFP_ATOMIC);
439 		if (!req->urb)
440 			goto fail;
441 
442 		INIT_LIST_HEAD(&req->list);
443 		list_add_tail(&req->list, q);
444 		req++;
445 	}
446 	return reqs;
447 fail:
448 	brcmf_err("fail!\n");
449 	while (!list_empty(q)) {
450 		req = list_entry(q->next, struct brcmf_usbreq, list);
451 		if (req)
452 			usb_free_urb(req->urb);
453 		list_del(q->next);
454 	}
455 	kfree(reqs);
456 	return NULL;
457 
458 }
459 
brcmf_usb_free_q(struct list_head * q)460 static void brcmf_usb_free_q(struct list_head *q)
461 {
462 	struct brcmf_usbreq *req, *next;
463 
464 	list_for_each_entry_safe(req, next, q, list) {
465 		if (!req->urb) {
466 			brcmf_err("bad req\n");
467 			break;
468 		}
469 		usb_free_urb(req->urb);
470 		list_del_init(&req->list);
471 	}
472 }
473 
brcmf_usb_del_fromq(struct brcmf_usbdev_info * devinfo,struct brcmf_usbreq * req)474 static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo,
475 				struct brcmf_usbreq *req)
476 {
477 	unsigned long flags;
478 
479 	spin_lock_irqsave(&devinfo->qlock, flags);
480 	list_del_init(&req->list);
481 	spin_unlock_irqrestore(&devinfo->qlock, flags);
482 }
483 
484 
brcmf_usb_tx_complete(struct urb * urb)485 static void brcmf_usb_tx_complete(struct urb *urb)
486 {
487 	struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context;
488 	struct brcmf_usbdev_info *devinfo = req->devinfo;
489 	unsigned long flags;
490 
491 	brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status,
492 		  req->skb);
493 	brcmf_usb_del_fromq(devinfo, req);
494 
495 	brcmf_proto_bcdc_txcomplete(devinfo->dev, req->skb, urb->status == 0);
496 	req->skb = NULL;
497 	brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount);
498 	spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
499 	if (devinfo->tx_freecount > devinfo->tx_high_watermark &&
500 		devinfo->tx_flowblock) {
501 		brcmf_proto_bcdc_txflowblock(devinfo->dev, false);
502 		devinfo->tx_flowblock = false;
503 	}
504 	spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
505 }
506 
brcmf_usb_rx_complete(struct urb * urb)507 static void brcmf_usb_rx_complete(struct urb *urb)
508 {
509 	struct brcmf_usbreq  *req = (struct brcmf_usbreq *)urb->context;
510 	struct brcmf_usbdev_info *devinfo = req->devinfo;
511 	struct sk_buff *skb;
512 
513 	brcmf_dbg(USB, "Enter, urb->status=%d\n", urb->status);
514 	brcmf_usb_del_fromq(devinfo, req);
515 	skb = req->skb;
516 	req->skb = NULL;
517 
518 	/* zero length packets indicate usb "failure". Do not refill */
519 	if (urb->status != 0 || !urb->actual_length) {
520 		brcmu_pkt_buf_free_skb(skb);
521 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
522 		return;
523 	}
524 
525 	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP ||
526 	    devinfo->bus_pub.state == BRCMFMAC_USB_STATE_SLEEP) {
527 		skb_put(skb, urb->actual_length);
528 		brcmf_rx_frame(devinfo->dev, skb, true, true);
529 		brcmf_usb_rx_refill(devinfo, req);
530 		usb_mark_last_busy(urb->dev);
531 	} else {
532 		brcmu_pkt_buf_free_skb(skb);
533 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
534 	}
535 	return;
536 
537 }
538 
brcmf_usb_rx_refill(struct brcmf_usbdev_info * devinfo,struct brcmf_usbreq * req)539 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
540 				struct brcmf_usbreq  *req)
541 {
542 	struct sk_buff *skb;
543 	int ret;
544 
545 	if (!req || !devinfo)
546 		return;
547 
548 	skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu);
549 	if (!skb) {
550 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
551 		return;
552 	}
553 	req->skb = skb;
554 
555 	usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe,
556 			  skb->data, skb_tailroom(skb), brcmf_usb_rx_complete,
557 			  req);
558 	req->devinfo = devinfo;
559 	brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL);
560 
561 	ret = usb_submit_urb(req->urb, GFP_ATOMIC);
562 	if (ret) {
563 		brcmf_usb_del_fromq(devinfo, req);
564 		brcmu_pkt_buf_free_skb(req->skb);
565 		req->skb = NULL;
566 		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
567 	}
568 	return;
569 }
570 
brcmf_usb_rx_fill_all(struct brcmf_usbdev_info * devinfo)571 static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
572 {
573 	struct brcmf_usbreq *req;
574 
575 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
576 		brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state);
577 		return;
578 	}
579 	while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
580 		brcmf_usb_rx_refill(devinfo, req);
581 }
582 
583 static void
brcmf_usb_state_change(struct brcmf_usbdev_info * devinfo,int state)584 brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
585 {
586 	struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
587 
588 	brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n",
589 		  devinfo->bus_pub.state, state);
590 
591 	if (devinfo->bus_pub.state == state)
592 		return;
593 
594 	devinfo->bus_pub.state = state;
595 
596 	/* update state of upper layer */
597 	if (state == BRCMFMAC_USB_STATE_DOWN) {
598 		brcmf_dbg(USB, "DBUS is down\n");
599 		brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_DOWN);
600 	} else if (state == BRCMFMAC_USB_STATE_UP) {
601 		brcmf_dbg(USB, "DBUS is up\n");
602 		brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_UP);
603 	} else {
604 		brcmf_dbg(USB, "DBUS current state=%d\n", state);
605 	}
606 }
607 
brcmf_usb_tx(struct device * dev,struct sk_buff * skb)608 static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
609 {
610 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
611 	struct brcmf_usbreq  *req;
612 	int ret;
613 	unsigned long flags;
614 	struct usb_interface *intf = to_usb_interface(dev);
615 
616 	ret = usb_autopm_get_interface(intf);
617 	if (ret)
618 		goto out;
619 
620 	brcmf_dbg(USB, "Enter, skb=%p\n", skb);
621 	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
622 		ret = -EIO;
623 		goto fail;
624 	}
625 
626 	req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
627 					&devinfo->tx_freecount);
628 	if (!req) {
629 		brcmf_err("no req to send\n");
630 		ret = -ENOMEM;
631 		goto fail;
632 	}
633 
634 	req->skb = skb;
635 	req->devinfo = devinfo;
636 	usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
637 			  skb->data, skb->len, brcmf_usb_tx_complete, req);
638 	req->urb->transfer_flags |= URB_ZERO_PACKET;
639 	brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
640 	ret = usb_submit_urb(req->urb, GFP_ATOMIC);
641 	if (ret) {
642 		brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n");
643 		brcmf_usb_del_fromq(devinfo, req);
644 		req->skb = NULL;
645 		brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
646 			      &devinfo->tx_freecount);
647 		goto fail;
648 	}
649 
650 	spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
651 	if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
652 	    !devinfo->tx_flowblock) {
653 		brcmf_proto_bcdc_txflowblock(dev, true);
654 		devinfo->tx_flowblock = true;
655 	}
656 	spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
657 
658 fail:
659 	usb_autopm_put_interface(intf);
660 out:
661 	return ret;
662 }
663 
664 
brcmf_usb_up(struct device * dev)665 static int brcmf_usb_up(struct device *dev)
666 {
667 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
668 
669 	brcmf_dbg(USB, "Enter\n");
670 	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP)
671 		return 0;
672 
673 	/* Success, indicate devinfo is fully up */
674 	brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_UP);
675 
676 	if (devinfo->ctl_urb) {
677 		devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0);
678 		devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0);
679 
680 		/* CTL Write */
681 		devinfo->ctl_write.bRequestType =
682 			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
683 		devinfo->ctl_write.bRequest = 0;
684 		devinfo->ctl_write.wValue = cpu_to_le16(0);
685 		devinfo->ctl_write.wIndex = cpu_to_le16(devinfo->ifnum);
686 
687 		/* CTL Read */
688 		devinfo->ctl_read.bRequestType =
689 			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
690 		devinfo->ctl_read.bRequest = 1;
691 		devinfo->ctl_read.wValue = cpu_to_le16(0);
692 		devinfo->ctl_read.wIndex = cpu_to_le16(devinfo->ifnum);
693 	}
694 	brcmf_usb_rx_fill_all(devinfo);
695 	return 0;
696 }
697 
brcmf_cancel_all_urbs(struct brcmf_usbdev_info * devinfo)698 static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo)
699 {
700 	int i;
701 
702 	if (devinfo->ctl_urb)
703 		usb_kill_urb(devinfo->ctl_urb);
704 	if (devinfo->bulk_urb)
705 		usb_kill_urb(devinfo->bulk_urb);
706 	if (devinfo->tx_reqs)
707 		for (i = 0; i < devinfo->bus_pub.ntxq; i++)
708 			usb_kill_urb(devinfo->tx_reqs[i].urb);
709 	if (devinfo->rx_reqs)
710 		for (i = 0; i < devinfo->bus_pub.nrxq; i++)
711 			usb_kill_urb(devinfo->rx_reqs[i].urb);
712 }
713 
brcmf_usb_down(struct device * dev)714 static void brcmf_usb_down(struct device *dev)
715 {
716 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
717 
718 	brcmf_dbg(USB, "Enter\n");
719 	if (devinfo == NULL)
720 		return;
721 
722 	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_DOWN)
723 		return;
724 
725 	brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_DOWN);
726 
727 	brcmf_cancel_all_urbs(devinfo);
728 }
729 
730 static void
brcmf_usb_sync_complete(struct urb * urb)731 brcmf_usb_sync_complete(struct urb *urb)
732 {
733 	struct brcmf_usbdev_info *devinfo =
734 			(struct brcmf_usbdev_info *)urb->context;
735 
736 	devinfo->ctl_completed = true;
737 	brcmf_usb_ioctl_resp_wake(devinfo);
738 }
739 
brcmf_usb_dl_cmd(struct brcmf_usbdev_info * devinfo,u8 cmd,void * buffer,int buflen)740 static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
741 			    void *buffer, int buflen)
742 {
743 	int ret;
744 	char *tmpbuf = NULL;
745 	u16 size;
746 
747 	if (!devinfo || !devinfo->ctl_urb) {
748 		ret = -EINVAL;
749 		goto err;
750 	}
751 
752 	tmpbuf = kmalloc(buflen, GFP_ATOMIC);
753 	if (!tmpbuf) {
754 		ret = -ENOMEM;
755 		goto err;
756 	}
757 
758 	size = buflen;
759 	devinfo->ctl_urb->transfer_buffer_length = size;
760 
761 	devinfo->ctl_read.wLength = cpu_to_le16p(&size);
762 	devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
763 		USB_RECIP_INTERFACE;
764 	devinfo->ctl_read.bRequest = cmd;
765 
766 	usb_fill_control_urb(devinfo->ctl_urb,
767 		devinfo->usbdev,
768 		usb_rcvctrlpipe(devinfo->usbdev, 0),
769 		(unsigned char *) &devinfo->ctl_read,
770 		(void *) tmpbuf, size,
771 		(usb_complete_t)brcmf_usb_sync_complete, devinfo);
772 
773 	devinfo->ctl_completed = false;
774 	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
775 	if (ret < 0) {
776 		brcmf_err("usb_submit_urb failed %d\n", ret);
777 		goto err;
778 	}
779 
780 	if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
781 		usb_kill_urb(devinfo->ctl_urb);
782 		ret = -ETIMEDOUT;
783 		goto err;
784 	} else {
785 		memcpy(buffer, tmpbuf, buflen);
786 	}
787 
788 	kfree(tmpbuf);
789 	return 0;
790 
791 err:
792 	kfree(tmpbuf);
793 	brcmf_err("dl cmd %u failed: err=%d\n", cmd, ret);
794 	return ret;
795 }
796 
797 static bool
brcmf_usb_dlneeded(struct brcmf_usbdev_info * devinfo)798 brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
799 {
800 	struct bootrom_id_le id;
801 	u32 chipid, chiprev;
802 
803 	brcmf_dbg(USB, "Enter\n");
804 
805 	if (devinfo == NULL)
806 		return false;
807 
808 	/* Check if firmware downloaded already by querying runtime ID */
809 	id.chip = cpu_to_le32(0xDEAD);
810 	brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
811 
812 	chipid = le32_to_cpu(id.chip);
813 	chiprev = le32_to_cpu(id.chiprev);
814 
815 	if ((chipid & 0x4300) == 0x4300)
816 		brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev);
817 	else
818 		brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev);
819 	if (chipid == BRCMF_POSTBOOT_ID) {
820 		brcmf_dbg(USB, "firmware already downloaded\n");
821 		brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
822 		return false;
823 	} else {
824 		devinfo->bus_pub.devid = chipid;
825 		devinfo->bus_pub.chiprev = chiprev;
826 	}
827 	return true;
828 }
829 
830 static int
brcmf_usb_resetcfg(struct brcmf_usbdev_info * devinfo)831 brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
832 {
833 	struct bootrom_id_le id;
834 	u32 loop_cnt;
835 	int err;
836 
837 	brcmf_dbg(USB, "Enter\n");
838 
839 	loop_cnt = 0;
840 	do {
841 		mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT);
842 		loop_cnt++;
843 		id.chip = cpu_to_le32(0xDEAD);       /* Get the ID */
844 		err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
845 		if ((err) && (err != -ETIMEDOUT))
846 			return err;
847 		if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
848 			break;
849 	} while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT);
850 
851 	if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
852 		brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n",
853 			  le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
854 
855 		brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
856 		return 0;
857 	} else {
858 		brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n",
859 			  BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt);
860 		return -EINVAL;
861 	}
862 }
863 
864 
865 static int
brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info * devinfo,void * buffer,int len)866 brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
867 {
868 	int ret;
869 
870 	if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
871 		return -EINVAL;
872 
873 	/* Prepare the URB */
874 	usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
875 			  devinfo->tx_pipe, buffer, len,
876 			  (usb_complete_t)brcmf_usb_sync_complete, devinfo);
877 
878 	devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
879 
880 	devinfo->ctl_completed = false;
881 	ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
882 	if (ret) {
883 		brcmf_err("usb_submit_urb failed %d\n", ret);
884 		return ret;
885 	}
886 	ret = brcmf_usb_ioctl_resp_wait(devinfo);
887 	return (ret == 0);
888 }
889 
890 static int
brcmf_usb_dl_writeimage(struct brcmf_usbdev_info * devinfo,u8 * fw,int fwlen)891 brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
892 {
893 	unsigned int sendlen, sent, dllen;
894 	char *bulkchunk = NULL, *dlpos;
895 	struct rdl_state_le state;
896 	u32 rdlstate, rdlbytes;
897 	int err = 0;
898 
899 	brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen);
900 
901 	bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC);
902 	if (bulkchunk == NULL) {
903 		err = -ENOMEM;
904 		goto fail;
905 	}
906 
907 	/* 1) Prepare USB boot loader for runtime image */
908 	err = brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state));
909 	if (err)
910 		goto fail;
911 
912 	rdlstate = le32_to_cpu(state.state);
913 	rdlbytes = le32_to_cpu(state.bytes);
914 
915 	/* 2) Check we are in the Waiting state */
916 	if (rdlstate != DL_WAITING) {
917 		brcmf_err("Invalid DL state: %u\n", rdlstate);
918 		err = -EINVAL;
919 		goto fail;
920 	}
921 	sent = 0;
922 	dlpos = fw;
923 	dllen = fwlen;
924 
925 	/* Get chip id and rev */
926 	while (rdlbytes != dllen) {
927 		/* Wait until the usb device reports it received all
928 		 * the bytes we sent */
929 		if ((rdlbytes == sent) && (rdlbytes != dllen)) {
930 			sendlen = min(dllen - sent, TRX_RDL_CHUNK);
931 
932 			/* simply avoid having to send a ZLP by ensuring we
933 			 * never have an even
934 			 * multiple of 64
935 			 */
936 			if (!(sendlen % 64))
937 				sendlen -= 4;
938 
939 			/* send data */
940 			memcpy(bulkchunk, dlpos, sendlen);
941 			if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
942 						   sendlen)) {
943 				brcmf_err("send_bulk failed\n");
944 				err = -EINVAL;
945 				goto fail;
946 			}
947 
948 			dlpos += sendlen;
949 			sent += sendlen;
950 		}
951 		err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
952 				       sizeof(state));
953 		if (err) {
954 			brcmf_err("DL_GETSTATE Failed\n");
955 			goto fail;
956 		}
957 
958 		rdlstate = le32_to_cpu(state.state);
959 		rdlbytes = le32_to_cpu(state.bytes);
960 
961 		/* restart if an error is reported */
962 		if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
963 			brcmf_err("Bad Hdr or Bad CRC state %d\n",
964 				  rdlstate);
965 			err = -EINVAL;
966 			goto fail;
967 		}
968 	}
969 
970 fail:
971 	kfree(bulkchunk);
972 	brcmf_dbg(USB, "Exit, err=%d\n", err);
973 	return err;
974 }
975 
brcmf_usb_dlstart(struct brcmf_usbdev_info * devinfo,u8 * fw,int len)976 static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
977 {
978 	int err;
979 
980 	brcmf_dbg(USB, "Enter\n");
981 
982 	if (devinfo == NULL)
983 		return -EINVAL;
984 
985 	if (devinfo->bus_pub.devid == 0xDEAD)
986 		return -EINVAL;
987 
988 	err = brcmf_usb_dl_writeimage(devinfo, fw, len);
989 	if (err == 0)
990 		devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE;
991 	else
992 		devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL;
993 	brcmf_dbg(USB, "Exit, err=%d\n", err);
994 
995 	return err;
996 }
997 
brcmf_usb_dlrun(struct brcmf_usbdev_info * devinfo)998 static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
999 {
1000 	struct rdl_state_le state;
1001 
1002 	brcmf_dbg(USB, "Enter\n");
1003 	if (!devinfo)
1004 		return -EINVAL;
1005 
1006 	if (devinfo->bus_pub.devid == 0xDEAD)
1007 		return -EINVAL;
1008 
1009 	/* Check we are runnable */
1010 	state.state = 0;
1011 	brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state));
1012 
1013 	/* Start the image */
1014 	if (state.state == cpu_to_le32(DL_RUNNABLE)) {
1015 		if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state)))
1016 			return -ENODEV;
1017 		if (brcmf_usb_resetcfg(devinfo))
1018 			return -ENODEV;
1019 		/* The Dongle may go for re-enumeration. */
1020 	} else {
1021 		brcmf_err("Dongle not runnable\n");
1022 		return -EINVAL;
1023 	}
1024 	brcmf_dbg(USB, "Exit\n");
1025 	return 0;
1026 }
1027 
1028 static int
brcmf_usb_fw_download(struct brcmf_usbdev_info * devinfo)1029 brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
1030 {
1031 	int err;
1032 	struct usb_interface *intf;
1033 
1034 	brcmf_dbg(USB, "Enter\n");
1035 	if (!devinfo) {
1036 		err = -ENODEV;
1037 		goto out;
1038 	}
1039 
1040 	if (!devinfo->image) {
1041 		brcmf_err("No firmware!\n");
1042 		err = -ENOENT;
1043 		goto out;
1044 	}
1045 
1046 	intf = to_usb_interface(devinfo->dev);
1047 	err = usb_autopm_get_interface(intf);
1048 	if (err)
1049 		goto out;
1050 
1051 	err = brcmf_usb_dlstart(devinfo,
1052 		(u8 *)devinfo->image, devinfo->image_len);
1053 	if (err == 0)
1054 		err = brcmf_usb_dlrun(devinfo);
1055 
1056 	usb_autopm_put_interface(intf);
1057 out:
1058 	return err;
1059 }
1060 
1061 
brcmf_usb_detach(struct brcmf_usbdev_info * devinfo)1062 static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1063 {
1064 	brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
1065 
1066 	/* free the URBS */
1067 	brcmf_usb_free_q(&devinfo->rx_freeq);
1068 	brcmf_usb_free_q(&devinfo->tx_freeq);
1069 
1070 	usb_free_urb(devinfo->ctl_urb);
1071 	usb_free_urb(devinfo->bulk_urb);
1072 
1073 	kfree(devinfo->tx_reqs);
1074 	kfree(devinfo->rx_reqs);
1075 
1076 	if (devinfo->settings)
1077 		brcmf_release_module_param(devinfo->settings);
1078 }
1079 
1080 
check_file(const u8 * headers)1081 static int check_file(const u8 *headers)
1082 {
1083 	struct trx_header_le *trx;
1084 	int actual_len = -1;
1085 
1086 	brcmf_dbg(USB, "Enter\n");
1087 	/* Extract trx header */
1088 	trx = (struct trx_header_le *) headers;
1089 	if (trx->magic != cpu_to_le32(TRX_MAGIC))
1090 		return -1;
1091 
1092 	headers += sizeof(struct trx_header_le);
1093 
1094 	if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1095 		actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1096 		return actual_len + sizeof(struct trx_header_le);
1097 	}
1098 	return -1;
1099 }
1100 
1101 
1102 static
brcmf_usb_attach(struct brcmf_usbdev_info * devinfo,int nrxq,int ntxq)1103 struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1104 				      int nrxq, int ntxq)
1105 {
1106 	brcmf_dbg(USB, "Enter\n");
1107 
1108 	devinfo->bus_pub.nrxq = nrxq;
1109 	devinfo->rx_low_watermark = nrxq / 2;
1110 	devinfo->bus_pub.devinfo = devinfo;
1111 	devinfo->bus_pub.ntxq = ntxq;
1112 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN;
1113 
1114 	/* flow control when too many tx urbs posted */
1115 	devinfo->tx_low_watermark = ntxq / 4;
1116 	devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1117 	devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1118 
1119 	/* Initialize other structure content */
1120 	init_waitqueue_head(&devinfo->ioctl_resp_wait);
1121 
1122 	/* Initialize the spinlocks */
1123 	spin_lock_init(&devinfo->qlock);
1124 	spin_lock_init(&devinfo->tx_flowblock_lock);
1125 
1126 	INIT_LIST_HEAD(&devinfo->rx_freeq);
1127 	INIT_LIST_HEAD(&devinfo->rx_postq);
1128 
1129 	INIT_LIST_HEAD(&devinfo->tx_freeq);
1130 	INIT_LIST_HEAD(&devinfo->tx_postq);
1131 
1132 	devinfo->tx_flowblock = false;
1133 
1134 	devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1135 	if (!devinfo->rx_reqs)
1136 		goto error;
1137 
1138 	devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1139 	if (!devinfo->tx_reqs)
1140 		goto error;
1141 	devinfo->tx_freecount = ntxq;
1142 
1143 	devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1144 	if (!devinfo->ctl_urb)
1145 		goto error;
1146 	devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1147 	if (!devinfo->bulk_urb)
1148 		goto error;
1149 
1150 	return &devinfo->bus_pub;
1151 
1152 error:
1153 	brcmf_err("failed!\n");
1154 	brcmf_usb_detach(devinfo);
1155 	return NULL;
1156 }
1157 
brcmf_usb_get_blob(struct device * dev,const struct firmware ** fw,enum brcmf_blob_type type)1158 static int brcmf_usb_get_blob(struct device *dev, const struct firmware **fw,
1159 			      enum brcmf_blob_type type)
1160 {
1161 	/* No blobs for USB devices... */
1162 	return -ENOENT;
1163 }
1164 
1165 static const struct brcmf_bus_ops brcmf_usb_bus_ops = {
1166 	.preinit = brcmf_usb_up,
1167 	.stop = brcmf_usb_down,
1168 	.txdata = brcmf_usb_tx,
1169 	.txctl = brcmf_usb_tx_ctlpkt,
1170 	.rxctl = brcmf_usb_rx_ctlpkt,
1171 	.get_blob = brcmf_usb_get_blob,
1172 };
1173 
1174 #define BRCMF_USB_FW_CODE	0
1175 
brcmf_usb_probe_phase2(struct device * dev,int ret,struct brcmf_fw_request * fwreq)1176 static void brcmf_usb_probe_phase2(struct device *dev, int ret,
1177 				   struct brcmf_fw_request *fwreq)
1178 {
1179 	struct brcmf_bus *bus = dev_get_drvdata(dev);
1180 	struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
1181 	const struct firmware *fw;
1182 
1183 	if (ret)
1184 		goto error;
1185 
1186 	brcmf_dbg(USB, "Start fw downloading\n");
1187 
1188 	fw = fwreq->items[BRCMF_USB_FW_CODE].binary;
1189 	kfree(fwreq);
1190 
1191 	ret = check_file(fw->data);
1192 	if (ret < 0) {
1193 		brcmf_err("invalid firmware\n");
1194 		release_firmware(fw);
1195 		goto error;
1196 	}
1197 
1198 	devinfo->image = fw->data;
1199 	devinfo->image_len = fw->size;
1200 
1201 	ret = brcmf_usb_fw_download(devinfo);
1202 	release_firmware(fw);
1203 	if (ret)
1204 		goto error;
1205 
1206 	ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1207 	if (ret)
1208 		goto error;
1209 
1210 	/* Attach to the common driver interface */
1211 	ret = brcmf_attach(devinfo->dev);
1212 	if (ret)
1213 		goto error;
1214 
1215 	complete(&devinfo->dev_init_done);
1216 	return;
1217 error:
1218 	brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
1219 	complete(&devinfo->dev_init_done);
1220 	device_release_driver(dev);
1221 }
1222 
1223 static struct brcmf_fw_request *
brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info * devinfo)1224 brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info *devinfo)
1225 {
1226 	struct brcmf_fw_request *fwreq;
1227 	struct brcmf_fw_name fwnames[] = {
1228 		{ ".bin", devinfo->fw_name },
1229 	};
1230 
1231 	fwreq = brcmf_fw_alloc_request(devinfo->bus_pub.devid,
1232 				       devinfo->bus_pub.chiprev,
1233 				       brcmf_usb_fwnames,
1234 				       ARRAY_SIZE(brcmf_usb_fwnames),
1235 				       fwnames, ARRAY_SIZE(fwnames));
1236 	if (!fwreq)
1237 		return NULL;
1238 
1239 	fwreq->items[BRCMF_USB_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
1240 
1241 	return fwreq;
1242 }
1243 
brcmf_usb_probe_cb(struct brcmf_usbdev_info * devinfo,enum brcmf_fwvendor fwvid)1244 static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo,
1245 			      enum brcmf_fwvendor fwvid)
1246 {
1247 	struct brcmf_bus *bus;
1248 	struct brcmf_usbdev *bus_pub;
1249 	struct device *dev = devinfo->dev;
1250 	struct brcmf_fw_request *fwreq;
1251 	int ret;
1252 
1253 	brcmf_dbg(USB, "Enter\n");
1254 	bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1255 	if (!bus_pub)
1256 		return -ENODEV;
1257 
1258 	bus = kzalloc(sizeof(*bus), GFP_ATOMIC);
1259 	if (!bus) {
1260 		ret = -ENOMEM;
1261 		goto fail;
1262 	}
1263 
1264 	bus->dev = dev;
1265 	bus_pub->bus = bus;
1266 	bus->bus_priv.usb = bus_pub;
1267 	dev_set_drvdata(dev, bus);
1268 	bus->ops = &brcmf_usb_bus_ops;
1269 	bus->proto_type = BRCMF_PROTO_BCDC;
1270 	bus->fwvid = fwvid;
1271 	bus->always_use_fws_queue = true;
1272 #ifdef CONFIG_PM
1273 	bus->wowl_supported = true;
1274 #endif
1275 
1276 	devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB,
1277 						   bus_pub->devid,
1278 						   bus_pub->chiprev);
1279 	if (!devinfo->settings) {
1280 		ret = -ENOMEM;
1281 		goto fail;
1282 	}
1283 	ret = PTR_ERR_OR_ZERO(devinfo->settings);
1284 	if (ret < 0)
1285 		goto fail;
1286 
1287 	if (!brcmf_usb_dlneeded(devinfo)) {
1288 		ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1289 		if (ret)
1290 			goto fail;
1291 		ret = brcmf_attach(devinfo->dev);
1292 		if (ret)
1293 			goto fail;
1294 		/* we are done */
1295 		complete(&devinfo->dev_init_done);
1296 		return 0;
1297 	}
1298 	bus->chip = bus_pub->devid;
1299 	bus->chiprev = bus_pub->chiprev;
1300 
1301 	fwreq = brcmf_usb_prepare_fw_request(devinfo);
1302 	if (!fwreq) {
1303 		ret = -ENOMEM;
1304 		goto fail;
1305 	}
1306 
1307 	/* request firmware here */
1308 	ret = brcmf_fw_get_firmwares(dev, fwreq, brcmf_usb_probe_phase2);
1309 	if (ret) {
1310 		brcmf_err("firmware request failed: %d\n", ret);
1311 		kfree(fwreq);
1312 		goto fail;
1313 	}
1314 
1315 	return 0;
1316 
1317 fail:
1318 	/* Release resources in reverse order */
1319 	brcmf_free(devinfo->dev);
1320 	kfree(bus);
1321 	brcmf_usb_detach(devinfo);
1322 	return ret;
1323 }
1324 
1325 static void
brcmf_usb_disconnect_cb(struct brcmf_usbdev_info * devinfo)1326 brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1327 {
1328 	if (!devinfo)
1329 		return;
1330 	brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
1331 
1332 	brcmf_detach(devinfo->dev);
1333 	brcmf_free(devinfo->dev);
1334 	kfree(devinfo->bus_pub.bus);
1335 	brcmf_usb_detach(devinfo);
1336 }
1337 
1338 /* Forward declaration for usb_match_id() call */
1339 static const struct usb_device_id brcmf_usb_devid_table[];
1340 
1341 static int
brcmf_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)1342 brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1343 {
1344 	struct usb_device *usb = interface_to_usbdev(intf);
1345 	struct brcmf_usbdev_info *devinfo;
1346 	struct usb_interface_descriptor	*desc;
1347 	struct usb_endpoint_descriptor *endpoint;
1348 	int ret = 0;
1349 	u32 num_of_eps;
1350 	u8 endpoint_num, ep;
1351 
1352 	if (!id) {
1353 		id = usb_match_id(intf, brcmf_usb_devid_table);
1354 		if (!id) {
1355 			dev_err(&intf->dev, "Error could not find matching usb_device_id\n");
1356 			return -ENODEV;
1357 		}
1358 	}
1359 
1360 	brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct);
1361 
1362 	devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1363 	if (devinfo == NULL)
1364 		return -ENOMEM;
1365 
1366 	devinfo->usbdev = usb;
1367 	devinfo->dev = &usb->dev;
1368 	/* Init completion, to protect for disconnect while still loading.
1369 	 * Necessary because of the asynchronous firmware load construction
1370 	 */
1371 	init_completion(&devinfo->dev_init_done);
1372 
1373 	usb_set_intfdata(intf, devinfo);
1374 
1375 	intf->needs_remote_wakeup = 1;
1376 
1377 	/* Check that the device supports only one configuration */
1378 	if (usb->descriptor.bNumConfigurations != 1) {
1379 		brcmf_err("Number of configurations: %d not supported\n",
1380 			  usb->descriptor.bNumConfigurations);
1381 		ret = -ENODEV;
1382 		goto fail;
1383 	}
1384 
1385 	if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) &&
1386 	    (usb->descriptor.bDeviceClass != USB_CLASS_MISC) &&
1387 	    (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) {
1388 		brcmf_err("Device class: 0x%x not supported\n",
1389 			  usb->descriptor.bDeviceClass);
1390 		ret = -ENODEV;
1391 		goto fail;
1392 	}
1393 
1394 	desc = &intf->cur_altsetting->desc;
1395 	if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1396 	    (desc->bInterfaceSubClass != 2) ||
1397 	    (desc->bInterfaceProtocol != 0xff)) {
1398 		brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n",
1399 			  desc->bInterfaceNumber, desc->bInterfaceClass,
1400 			  desc->bInterfaceSubClass, desc->bInterfaceProtocol);
1401 		ret = -ENODEV;
1402 		goto fail;
1403 	}
1404 
1405 	num_of_eps = desc->bNumEndpoints;
1406 	for (ep = 0; ep < num_of_eps; ep++) {
1407 		endpoint = &intf->cur_altsetting->endpoint[ep].desc;
1408 		endpoint_num = usb_endpoint_num(endpoint);
1409 		if (!usb_endpoint_xfer_bulk(endpoint))
1410 			continue;
1411 		if (usb_endpoint_dir_in(endpoint)) {
1412 			if (!devinfo->rx_pipe)
1413 				devinfo->rx_pipe =
1414 					usb_rcvbulkpipe(usb, endpoint_num);
1415 		} else {
1416 			if (!devinfo->tx_pipe)
1417 				devinfo->tx_pipe =
1418 					usb_sndbulkpipe(usb, endpoint_num);
1419 		}
1420 	}
1421 	if (devinfo->rx_pipe == 0) {
1422 		brcmf_err("No RX (in) Bulk EP found\n");
1423 		ret = -ENODEV;
1424 		goto fail;
1425 	}
1426 	if (devinfo->tx_pipe == 0) {
1427 		brcmf_err("No TX (out) Bulk EP found\n");
1428 		ret = -ENODEV;
1429 		goto fail;
1430 	}
1431 
1432 	devinfo->ifnum = desc->bInterfaceNumber;
1433 
1434 	if (usb->speed == USB_SPEED_SUPER_PLUS)
1435 		brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n");
1436 	else if (usb->speed == USB_SPEED_SUPER)
1437 		brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n");
1438 	else if (usb->speed == USB_SPEED_HIGH)
1439 		brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n");
1440 	else
1441 		brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n");
1442 
1443 	ret = brcmf_usb_probe_cb(devinfo, id->driver_info);
1444 	if (ret)
1445 		goto fail;
1446 
1447 	/* Success */
1448 	return 0;
1449 
1450 fail:
1451 	complete(&devinfo->dev_init_done);
1452 	kfree(devinfo);
1453 	usb_set_intfdata(intf, NULL);
1454 	return ret;
1455 }
1456 
1457 static void
brcmf_usb_disconnect(struct usb_interface * intf)1458 brcmf_usb_disconnect(struct usb_interface *intf)
1459 {
1460 	struct brcmf_usbdev_info *devinfo;
1461 
1462 	brcmf_dbg(USB, "Enter\n");
1463 	devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1464 
1465 	if (devinfo) {
1466 		wait_for_completion(&devinfo->dev_init_done);
1467 		/* Make sure that devinfo still exists. Firmware probe routines
1468 		 * may have released the device and cleared the intfdata.
1469 		 */
1470 		if (!usb_get_intfdata(intf))
1471 			goto done;
1472 
1473 		brcmf_usb_disconnect_cb(devinfo);
1474 		kfree(devinfo);
1475 	}
1476 done:
1477 	brcmf_dbg(USB, "Exit\n");
1478 }
1479 
1480 /*
1481  * only need to signal the bus being down and update the state.
1482  */
brcmf_usb_suspend(struct usb_interface * intf,pm_message_t state)1483 static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1484 {
1485 	struct usb_device *usb = interface_to_usbdev(intf);
1486 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1487 
1488 	brcmf_dbg(USB, "Enter\n");
1489 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
1490 	brcmf_cancel_all_urbs(devinfo);
1491 	device_set_wakeup_enable(devinfo->dev, true);
1492 	return 0;
1493 }
1494 
1495 /*
1496  * (re-) start the bus.
1497  */
brcmf_usb_resume(struct usb_interface * intf)1498 static int brcmf_usb_resume(struct usb_interface *intf)
1499 {
1500 	struct usb_device *usb = interface_to_usbdev(intf);
1501 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1502 
1503 	brcmf_dbg(USB, "Enter\n");
1504 
1505 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
1506 	brcmf_usb_rx_fill_all(devinfo);
1507 	device_set_wakeup_enable(devinfo->dev, false);
1508 	return 0;
1509 }
1510 
brcmf_usb_reset_resume(struct usb_interface * intf)1511 static int brcmf_usb_reset_resume(struct usb_interface *intf)
1512 {
1513 	struct usb_device *usb = interface_to_usbdev(intf);
1514 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1515 	struct brcmf_fw_request *fwreq;
1516 	int ret;
1517 
1518 	brcmf_dbg(USB, "Enter\n");
1519 
1520 	fwreq = brcmf_usb_prepare_fw_request(devinfo);
1521 	if (!fwreq)
1522 		return -ENOMEM;
1523 
1524 	ret = brcmf_fw_get_firmwares(&usb->dev, fwreq, brcmf_usb_probe_phase2);
1525 	if (ret < 0)
1526 		kfree(fwreq);
1527 
1528 	return ret;
1529 }
1530 
1531 #define BRCMF_USB_DEVICE(dev_id) \
1532 	{ \
1533 		USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id), \
1534 		.driver_info = BRCMF_FWVENDOR_WCC \
1535 	}
1536 
1537 #define LINKSYS_USB_DEVICE(dev_id) \
1538 	{ \
1539 		USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id), \
1540 		.driver_info = BRCMF_FWVENDOR_WCC \
1541 	}
1542 
1543 #define CYPRESS_USB_DEVICE(dev_id) \
1544 	{ \
1545 		USB_DEVICE(CY_USB_VENDOR_ID_CYPRESS, dev_id), \
1546 		.driver_info = BRCMF_FWVENDOR_WCC \
1547 	}
1548 
1549 static const struct usb_device_id brcmf_usb_devid_table[] = {
1550 	BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID),
1551 	BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID),
1552 	BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID),
1553 	BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID),
1554 	LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID),
1555 	CYPRESS_USB_DEVICE(CY_USB_4373_DEVICE_ID),
1556 	{ USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) },
1557 	/* special entry for device with firmware loaded and running */
1558 	BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1559 	CYPRESS_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1560 	{ /* end: all zeroes */ }
1561 };
1562 
1563 MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1564 
1565 static struct usb_driver brcmf_usbdrvr = {
1566 	.name = KBUILD_MODNAME,
1567 	.probe = brcmf_usb_probe,
1568 	.disconnect = brcmf_usb_disconnect,
1569 	.id_table = brcmf_usb_devid_table,
1570 	.suspend = brcmf_usb_suspend,
1571 	.resume = brcmf_usb_resume,
1572 	.reset_resume = brcmf_usb_reset_resume,
1573 	.supports_autosuspend = true,
1574 	.disable_hub_initiated_lpm = 1,
1575 };
1576 
brcmf_usb_reset_device(struct device * dev,void * notused)1577 static int brcmf_usb_reset_device(struct device *dev, void *notused)
1578 {
1579 	/* device past is the usb interface so we
1580 	 * need to use parent here.
1581 	 */
1582 	brcmf_dev_reset(dev->parent);
1583 	return 0;
1584 }
1585 
brcmf_usb_exit(void)1586 void brcmf_usb_exit(void)
1587 {
1588 	struct device_driver *drv = &brcmf_usbdrvr.driver;
1589 	int ret;
1590 
1591 	brcmf_dbg(USB, "Enter\n");
1592 	ret = driver_for_each_device(drv, NULL, NULL,
1593 				     brcmf_usb_reset_device);
1594 	if (ret)
1595 		brcmf_err("failed to reset all usb devices %d\n", ret);
1596 
1597 	usb_deregister(&brcmf_usbdrvr);
1598 }
1599 
brcmf_usb_register(void)1600 int brcmf_usb_register(void)
1601 {
1602 	brcmf_dbg(USB, "Enter\n");
1603 	return usb_register(&brcmf_usbdrvr);
1604 }
1605