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;
745 u16 size;
746
747 if ((!devinfo) || (devinfo->ctl_urb == NULL))
748 return -EINVAL;
749
750 tmpbuf = kmalloc(buflen, GFP_ATOMIC);
751 if (!tmpbuf)
752 return -ENOMEM;
753
754 size = buflen;
755 devinfo->ctl_urb->transfer_buffer_length = size;
756
757 devinfo->ctl_read.wLength = cpu_to_le16p(&size);
758 devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
759 USB_RECIP_INTERFACE;
760 devinfo->ctl_read.bRequest = cmd;
761
762 usb_fill_control_urb(devinfo->ctl_urb,
763 devinfo->usbdev,
764 usb_rcvctrlpipe(devinfo->usbdev, 0),
765 (unsigned char *) &devinfo->ctl_read,
766 (void *) tmpbuf, size,
767 (usb_complete_t)brcmf_usb_sync_complete, devinfo);
768
769 devinfo->ctl_completed = false;
770 ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
771 if (ret < 0) {
772 brcmf_err("usb_submit_urb failed %d\n", ret);
773 goto finalize;
774 }
775
776 if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
777 usb_kill_urb(devinfo->ctl_urb);
778 ret = -ETIMEDOUT;
779 } else {
780 memcpy(buffer, tmpbuf, buflen);
781 }
782
783 finalize:
784 kfree(tmpbuf);
785 return ret;
786 }
787
788 static bool
brcmf_usb_dlneeded(struct brcmf_usbdev_info * devinfo)789 brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
790 {
791 struct bootrom_id_le id;
792 u32 chipid, chiprev;
793
794 brcmf_dbg(USB, "Enter\n");
795
796 if (devinfo == NULL)
797 return false;
798
799 /* Check if firmware downloaded already by querying runtime ID */
800 id.chip = cpu_to_le32(0xDEAD);
801 brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
802
803 chipid = le32_to_cpu(id.chip);
804 chiprev = le32_to_cpu(id.chiprev);
805
806 if ((chipid & 0x4300) == 0x4300)
807 brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev);
808 else
809 brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev);
810 if (chipid == BRCMF_POSTBOOT_ID) {
811 brcmf_dbg(USB, "firmware already downloaded\n");
812 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
813 return false;
814 } else {
815 devinfo->bus_pub.devid = chipid;
816 devinfo->bus_pub.chiprev = chiprev;
817 }
818 return true;
819 }
820
821 static int
brcmf_usb_resetcfg(struct brcmf_usbdev_info * devinfo)822 brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
823 {
824 struct bootrom_id_le id;
825 u32 loop_cnt;
826 int err;
827
828 brcmf_dbg(USB, "Enter\n");
829
830 loop_cnt = 0;
831 do {
832 mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT);
833 loop_cnt++;
834 id.chip = cpu_to_le32(0xDEAD); /* Get the ID */
835 err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
836 if ((err) && (err != -ETIMEDOUT))
837 return err;
838 if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
839 break;
840 } while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT);
841
842 if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
843 brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n",
844 le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
845
846 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
847 return 0;
848 } else {
849 brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n",
850 BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt);
851 return -EINVAL;
852 }
853 }
854
855
856 static int
brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info * devinfo,void * buffer,int len)857 brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
858 {
859 int ret;
860
861 if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
862 return -EINVAL;
863
864 /* Prepare the URB */
865 usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
866 devinfo->tx_pipe, buffer, len,
867 (usb_complete_t)brcmf_usb_sync_complete, devinfo);
868
869 devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
870
871 devinfo->ctl_completed = false;
872 ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
873 if (ret) {
874 brcmf_err("usb_submit_urb failed %d\n", ret);
875 return ret;
876 }
877 ret = brcmf_usb_ioctl_resp_wait(devinfo);
878 return (ret == 0);
879 }
880
881 static int
brcmf_usb_dl_writeimage(struct brcmf_usbdev_info * devinfo,u8 * fw,int fwlen)882 brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
883 {
884 unsigned int sendlen, sent, dllen;
885 char *bulkchunk = NULL, *dlpos;
886 struct rdl_state_le state;
887 u32 rdlstate, rdlbytes;
888 int err = 0;
889
890 brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen);
891
892 bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC);
893 if (bulkchunk == NULL) {
894 err = -ENOMEM;
895 goto fail;
896 }
897
898 /* 1) Prepare USB boot loader for runtime image */
899 brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state));
900
901 rdlstate = le32_to_cpu(state.state);
902 rdlbytes = le32_to_cpu(state.bytes);
903
904 /* 2) Check we are in the Waiting state */
905 if (rdlstate != DL_WAITING) {
906 brcmf_err("Failed to DL_START\n");
907 err = -EINVAL;
908 goto fail;
909 }
910 sent = 0;
911 dlpos = fw;
912 dllen = fwlen;
913
914 /* Get chip id and rev */
915 while (rdlbytes != dllen) {
916 /* Wait until the usb device reports it received all
917 * the bytes we sent */
918 if ((rdlbytes == sent) && (rdlbytes != dllen)) {
919 if ((dllen-sent) < TRX_RDL_CHUNK)
920 sendlen = dllen-sent;
921 else
922 sendlen = TRX_RDL_CHUNK;
923
924 /* simply avoid having to send a ZLP by ensuring we
925 * never have an even
926 * multiple of 64
927 */
928 if (!(sendlen % 64))
929 sendlen -= 4;
930
931 /* send data */
932 memcpy(bulkchunk, dlpos, sendlen);
933 if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
934 sendlen)) {
935 brcmf_err("send_bulk failed\n");
936 err = -EINVAL;
937 goto fail;
938 }
939
940 dlpos += sendlen;
941 sent += sendlen;
942 }
943 err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
944 sizeof(state));
945 if (err) {
946 brcmf_err("DL_GETSTATE Failed\n");
947 goto fail;
948 }
949
950 rdlstate = le32_to_cpu(state.state);
951 rdlbytes = le32_to_cpu(state.bytes);
952
953 /* restart if an error is reported */
954 if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
955 brcmf_err("Bad Hdr or Bad CRC state %d\n",
956 rdlstate);
957 err = -EINVAL;
958 goto fail;
959 }
960 }
961
962 fail:
963 kfree(bulkchunk);
964 brcmf_dbg(USB, "Exit, err=%d\n", err);
965 return err;
966 }
967
brcmf_usb_dlstart(struct brcmf_usbdev_info * devinfo,u8 * fw,int len)968 static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
969 {
970 int err;
971
972 brcmf_dbg(USB, "Enter\n");
973
974 if (devinfo == NULL)
975 return -EINVAL;
976
977 if (devinfo->bus_pub.devid == 0xDEAD)
978 return -EINVAL;
979
980 err = brcmf_usb_dl_writeimage(devinfo, fw, len);
981 if (err == 0)
982 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE;
983 else
984 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL;
985 brcmf_dbg(USB, "Exit, err=%d\n", err);
986
987 return err;
988 }
989
brcmf_usb_dlrun(struct brcmf_usbdev_info * devinfo)990 static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
991 {
992 struct rdl_state_le state;
993
994 brcmf_dbg(USB, "Enter\n");
995 if (!devinfo)
996 return -EINVAL;
997
998 if (devinfo->bus_pub.devid == 0xDEAD)
999 return -EINVAL;
1000
1001 /* Check we are runnable */
1002 state.state = 0;
1003 brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state));
1004
1005 /* Start the image */
1006 if (state.state == cpu_to_le32(DL_RUNNABLE)) {
1007 if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state)))
1008 return -ENODEV;
1009 if (brcmf_usb_resetcfg(devinfo))
1010 return -ENODEV;
1011 /* The Dongle may go for re-enumeration. */
1012 } else {
1013 brcmf_err("Dongle not runnable\n");
1014 return -EINVAL;
1015 }
1016 brcmf_dbg(USB, "Exit\n");
1017 return 0;
1018 }
1019
1020 static int
brcmf_usb_fw_download(struct brcmf_usbdev_info * devinfo)1021 brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
1022 {
1023 int err;
1024 struct usb_interface *intf;
1025
1026 brcmf_dbg(USB, "Enter\n");
1027 if (!devinfo) {
1028 err = -ENODEV;
1029 goto out;
1030 }
1031
1032 if (!devinfo->image) {
1033 brcmf_err("No firmware!\n");
1034 err = -ENOENT;
1035 goto out;
1036 }
1037
1038 intf = to_usb_interface(devinfo->dev);
1039 err = usb_autopm_get_interface(intf);
1040 if (err)
1041 goto out;
1042
1043 err = brcmf_usb_dlstart(devinfo,
1044 (u8 *)devinfo->image, devinfo->image_len);
1045 if (err == 0)
1046 err = brcmf_usb_dlrun(devinfo);
1047
1048 usb_autopm_put_interface(intf);
1049 out:
1050 return err;
1051 }
1052
1053
brcmf_usb_detach(struct brcmf_usbdev_info * devinfo)1054 static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1055 {
1056 brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
1057
1058 /* free the URBS */
1059 brcmf_usb_free_q(&devinfo->rx_freeq);
1060 brcmf_usb_free_q(&devinfo->tx_freeq);
1061
1062 usb_free_urb(devinfo->ctl_urb);
1063 usb_free_urb(devinfo->bulk_urb);
1064
1065 kfree(devinfo->tx_reqs);
1066 kfree(devinfo->rx_reqs);
1067
1068 if (devinfo->settings)
1069 brcmf_release_module_param(devinfo->settings);
1070 }
1071
1072
check_file(const u8 * headers)1073 static int check_file(const u8 *headers)
1074 {
1075 struct trx_header_le *trx;
1076 int actual_len = -1;
1077
1078 brcmf_dbg(USB, "Enter\n");
1079 /* Extract trx header */
1080 trx = (struct trx_header_le *) headers;
1081 if (trx->magic != cpu_to_le32(TRX_MAGIC))
1082 return -1;
1083
1084 headers += sizeof(struct trx_header_le);
1085
1086 if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1087 actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1088 return actual_len + sizeof(struct trx_header_le);
1089 }
1090 return -1;
1091 }
1092
1093
1094 static
brcmf_usb_attach(struct brcmf_usbdev_info * devinfo,int nrxq,int ntxq)1095 struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1096 int nrxq, int ntxq)
1097 {
1098 brcmf_dbg(USB, "Enter\n");
1099
1100 devinfo->bus_pub.nrxq = nrxq;
1101 devinfo->rx_low_watermark = nrxq / 2;
1102 devinfo->bus_pub.devinfo = devinfo;
1103 devinfo->bus_pub.ntxq = ntxq;
1104 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN;
1105
1106 /* flow control when too many tx urbs posted */
1107 devinfo->tx_low_watermark = ntxq / 4;
1108 devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1109 devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1110
1111 /* Initialize other structure content */
1112 init_waitqueue_head(&devinfo->ioctl_resp_wait);
1113
1114 /* Initialize the spinlocks */
1115 spin_lock_init(&devinfo->qlock);
1116 spin_lock_init(&devinfo->tx_flowblock_lock);
1117
1118 INIT_LIST_HEAD(&devinfo->rx_freeq);
1119 INIT_LIST_HEAD(&devinfo->rx_postq);
1120
1121 INIT_LIST_HEAD(&devinfo->tx_freeq);
1122 INIT_LIST_HEAD(&devinfo->tx_postq);
1123
1124 devinfo->tx_flowblock = false;
1125
1126 devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1127 if (!devinfo->rx_reqs)
1128 goto error;
1129
1130 devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1131 if (!devinfo->tx_reqs)
1132 goto error;
1133 devinfo->tx_freecount = ntxq;
1134
1135 devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1136 if (!devinfo->ctl_urb)
1137 goto error;
1138 devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1139 if (!devinfo->bulk_urb)
1140 goto error;
1141
1142 return &devinfo->bus_pub;
1143
1144 error:
1145 brcmf_err("failed!\n");
1146 brcmf_usb_detach(devinfo);
1147 return NULL;
1148 }
1149
brcmf_usb_get_blob(struct device * dev,const struct firmware ** fw,enum brcmf_blob_type type)1150 static int brcmf_usb_get_blob(struct device *dev, const struct firmware **fw,
1151 enum brcmf_blob_type type)
1152 {
1153 /* No blobs for USB devices... */
1154 return -ENOENT;
1155 }
1156
1157 static const struct brcmf_bus_ops brcmf_usb_bus_ops = {
1158 .preinit = brcmf_usb_up,
1159 .stop = brcmf_usb_down,
1160 .txdata = brcmf_usb_tx,
1161 .txctl = brcmf_usb_tx_ctlpkt,
1162 .rxctl = brcmf_usb_rx_ctlpkt,
1163 .get_blob = brcmf_usb_get_blob,
1164 };
1165
1166 #define BRCMF_USB_FW_CODE 0
1167
brcmf_usb_probe_phase2(struct device * dev,int ret,struct brcmf_fw_request * fwreq)1168 static void brcmf_usb_probe_phase2(struct device *dev, int ret,
1169 struct brcmf_fw_request *fwreq)
1170 {
1171 struct brcmf_bus *bus = dev_get_drvdata(dev);
1172 struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
1173 const struct firmware *fw;
1174
1175 if (ret)
1176 goto error;
1177
1178 brcmf_dbg(USB, "Start fw downloading\n");
1179
1180 fw = fwreq->items[BRCMF_USB_FW_CODE].binary;
1181 kfree(fwreq);
1182
1183 ret = check_file(fw->data);
1184 if (ret < 0) {
1185 brcmf_err("invalid firmware\n");
1186 release_firmware(fw);
1187 goto error;
1188 }
1189
1190 devinfo->image = fw->data;
1191 devinfo->image_len = fw->size;
1192
1193 ret = brcmf_usb_fw_download(devinfo);
1194 release_firmware(fw);
1195 if (ret)
1196 goto error;
1197
1198 ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1199 if (ret)
1200 goto error;
1201
1202 /* Attach to the common driver interface */
1203 ret = brcmf_attach(devinfo->dev);
1204 if (ret)
1205 goto error;
1206
1207 complete(&devinfo->dev_init_done);
1208 return;
1209 error:
1210 brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
1211 complete(&devinfo->dev_init_done);
1212 device_release_driver(dev);
1213 }
1214
1215 static struct brcmf_fw_request *
brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info * devinfo)1216 brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info *devinfo)
1217 {
1218 struct brcmf_fw_request *fwreq;
1219 struct brcmf_fw_name fwnames[] = {
1220 { ".bin", devinfo->fw_name },
1221 };
1222
1223 fwreq = brcmf_fw_alloc_request(devinfo->bus_pub.devid,
1224 devinfo->bus_pub.chiprev,
1225 brcmf_usb_fwnames,
1226 ARRAY_SIZE(brcmf_usb_fwnames),
1227 fwnames, ARRAY_SIZE(fwnames));
1228 if (!fwreq)
1229 return NULL;
1230
1231 fwreq->items[BRCMF_USB_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
1232
1233 return fwreq;
1234 }
1235
brcmf_usb_probe_cb(struct brcmf_usbdev_info * devinfo,enum brcmf_fwvendor fwvid)1236 static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo,
1237 enum brcmf_fwvendor fwvid)
1238 {
1239 struct brcmf_bus *bus;
1240 struct brcmf_usbdev *bus_pub;
1241 struct device *dev = devinfo->dev;
1242 struct brcmf_fw_request *fwreq;
1243 int ret;
1244
1245 brcmf_dbg(USB, "Enter\n");
1246 bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1247 if (!bus_pub)
1248 return -ENODEV;
1249
1250 bus = kzalloc(sizeof(*bus), GFP_ATOMIC);
1251 if (!bus) {
1252 ret = -ENOMEM;
1253 goto fail;
1254 }
1255
1256 bus->dev = dev;
1257 bus_pub->bus = bus;
1258 bus->bus_priv.usb = bus_pub;
1259 dev_set_drvdata(dev, bus);
1260 bus->ops = &brcmf_usb_bus_ops;
1261 bus->proto_type = BRCMF_PROTO_BCDC;
1262 bus->fwvid = fwvid;
1263 bus->always_use_fws_queue = true;
1264 #ifdef CONFIG_PM
1265 bus->wowl_supported = true;
1266 #endif
1267
1268 devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB,
1269 bus_pub->devid,
1270 bus_pub->chiprev);
1271 if (!devinfo->settings) {
1272 ret = -ENOMEM;
1273 goto fail;
1274 }
1275
1276 if (!brcmf_usb_dlneeded(devinfo)) {
1277 ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1278 if (ret)
1279 goto fail;
1280 ret = brcmf_attach(devinfo->dev);
1281 if (ret)
1282 goto fail;
1283 /* we are done */
1284 complete(&devinfo->dev_init_done);
1285 return 0;
1286 }
1287 bus->chip = bus_pub->devid;
1288 bus->chiprev = bus_pub->chiprev;
1289
1290 fwreq = brcmf_usb_prepare_fw_request(devinfo);
1291 if (!fwreq) {
1292 ret = -ENOMEM;
1293 goto fail;
1294 }
1295
1296 /* request firmware here */
1297 ret = brcmf_fw_get_firmwares(dev, fwreq, brcmf_usb_probe_phase2);
1298 if (ret) {
1299 brcmf_err("firmware request failed: %d\n", ret);
1300 kfree(fwreq);
1301 goto fail;
1302 }
1303
1304 return 0;
1305
1306 fail:
1307 /* Release resources in reverse order */
1308 brcmf_free(devinfo->dev);
1309 kfree(bus);
1310 brcmf_usb_detach(devinfo);
1311 return ret;
1312 }
1313
1314 static void
brcmf_usb_disconnect_cb(struct brcmf_usbdev_info * devinfo)1315 brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1316 {
1317 if (!devinfo)
1318 return;
1319 brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
1320
1321 brcmf_detach(devinfo->dev);
1322 brcmf_free(devinfo->dev);
1323 kfree(devinfo->bus_pub.bus);
1324 brcmf_usb_detach(devinfo);
1325 }
1326
1327 /* Forward declaration for usb_match_id() call */
1328 static const struct usb_device_id brcmf_usb_devid_table[];
1329
1330 static int
brcmf_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)1331 brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1332 {
1333 struct usb_device *usb = interface_to_usbdev(intf);
1334 struct brcmf_usbdev_info *devinfo;
1335 struct usb_interface_descriptor *desc;
1336 struct usb_endpoint_descriptor *endpoint;
1337 int ret = 0;
1338 u32 num_of_eps;
1339 u8 endpoint_num, ep;
1340
1341 if (!id) {
1342 id = usb_match_id(intf, brcmf_usb_devid_table);
1343 if (!id) {
1344 dev_err(&intf->dev, "Error could not find matching usb_device_id\n");
1345 return -ENODEV;
1346 }
1347 }
1348
1349 brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct);
1350
1351 devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1352 if (devinfo == NULL)
1353 return -ENOMEM;
1354
1355 devinfo->usbdev = usb;
1356 devinfo->dev = &usb->dev;
1357 /* Init completion, to protect for disconnect while still loading.
1358 * Necessary because of the asynchronous firmware load construction
1359 */
1360 init_completion(&devinfo->dev_init_done);
1361
1362 usb_set_intfdata(intf, devinfo);
1363
1364 intf->needs_remote_wakeup = 1;
1365
1366 /* Check that the device supports only one configuration */
1367 if (usb->descriptor.bNumConfigurations != 1) {
1368 brcmf_err("Number of configurations: %d not supported\n",
1369 usb->descriptor.bNumConfigurations);
1370 ret = -ENODEV;
1371 goto fail;
1372 }
1373
1374 if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) &&
1375 (usb->descriptor.bDeviceClass != USB_CLASS_MISC) &&
1376 (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) {
1377 brcmf_err("Device class: 0x%x not supported\n",
1378 usb->descriptor.bDeviceClass);
1379 ret = -ENODEV;
1380 goto fail;
1381 }
1382
1383 desc = &intf->cur_altsetting->desc;
1384 if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1385 (desc->bInterfaceSubClass != 2) ||
1386 (desc->bInterfaceProtocol != 0xff)) {
1387 brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n",
1388 desc->bInterfaceNumber, desc->bInterfaceClass,
1389 desc->bInterfaceSubClass, desc->bInterfaceProtocol);
1390 ret = -ENODEV;
1391 goto fail;
1392 }
1393
1394 num_of_eps = desc->bNumEndpoints;
1395 for (ep = 0; ep < num_of_eps; ep++) {
1396 endpoint = &intf->cur_altsetting->endpoint[ep].desc;
1397 endpoint_num = usb_endpoint_num(endpoint);
1398 if (!usb_endpoint_xfer_bulk(endpoint))
1399 continue;
1400 if (usb_endpoint_dir_in(endpoint)) {
1401 if (!devinfo->rx_pipe)
1402 devinfo->rx_pipe =
1403 usb_rcvbulkpipe(usb, endpoint_num);
1404 } else {
1405 if (!devinfo->tx_pipe)
1406 devinfo->tx_pipe =
1407 usb_sndbulkpipe(usb, endpoint_num);
1408 }
1409 }
1410 if (devinfo->rx_pipe == 0) {
1411 brcmf_err("No RX (in) Bulk EP found\n");
1412 ret = -ENODEV;
1413 goto fail;
1414 }
1415 if (devinfo->tx_pipe == 0) {
1416 brcmf_err("No TX (out) Bulk EP found\n");
1417 ret = -ENODEV;
1418 goto fail;
1419 }
1420
1421 devinfo->ifnum = desc->bInterfaceNumber;
1422
1423 if (usb->speed == USB_SPEED_SUPER_PLUS)
1424 brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n");
1425 else if (usb->speed == USB_SPEED_SUPER)
1426 brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n");
1427 else if (usb->speed == USB_SPEED_HIGH)
1428 brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n");
1429 else
1430 brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n");
1431
1432 ret = brcmf_usb_probe_cb(devinfo, id->driver_info);
1433 if (ret)
1434 goto fail;
1435
1436 /* Success */
1437 return 0;
1438
1439 fail:
1440 complete(&devinfo->dev_init_done);
1441 kfree(devinfo);
1442 usb_set_intfdata(intf, NULL);
1443 return ret;
1444 }
1445
1446 static void
brcmf_usb_disconnect(struct usb_interface * intf)1447 brcmf_usb_disconnect(struct usb_interface *intf)
1448 {
1449 struct brcmf_usbdev_info *devinfo;
1450
1451 brcmf_dbg(USB, "Enter\n");
1452 devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1453
1454 if (devinfo) {
1455 wait_for_completion(&devinfo->dev_init_done);
1456 /* Make sure that devinfo still exists. Firmware probe routines
1457 * may have released the device and cleared the intfdata.
1458 */
1459 if (!usb_get_intfdata(intf))
1460 goto done;
1461
1462 brcmf_usb_disconnect_cb(devinfo);
1463 kfree(devinfo);
1464 }
1465 done:
1466 brcmf_dbg(USB, "Exit\n");
1467 }
1468
1469 /*
1470 * only need to signal the bus being down and update the state.
1471 */
brcmf_usb_suspend(struct usb_interface * intf,pm_message_t state)1472 static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1473 {
1474 struct usb_device *usb = interface_to_usbdev(intf);
1475 struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1476
1477 brcmf_dbg(USB, "Enter\n");
1478 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
1479 brcmf_cancel_all_urbs(devinfo);
1480 device_set_wakeup_enable(devinfo->dev, true);
1481 return 0;
1482 }
1483
1484 /*
1485 * (re-) start the bus.
1486 */
brcmf_usb_resume(struct usb_interface * intf)1487 static int brcmf_usb_resume(struct usb_interface *intf)
1488 {
1489 struct usb_device *usb = interface_to_usbdev(intf);
1490 struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1491
1492 brcmf_dbg(USB, "Enter\n");
1493
1494 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
1495 brcmf_usb_rx_fill_all(devinfo);
1496 device_set_wakeup_enable(devinfo->dev, false);
1497 return 0;
1498 }
1499
brcmf_usb_reset_resume(struct usb_interface * intf)1500 static int brcmf_usb_reset_resume(struct usb_interface *intf)
1501 {
1502 struct usb_device *usb = interface_to_usbdev(intf);
1503 struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1504 struct brcmf_fw_request *fwreq;
1505 int ret;
1506
1507 brcmf_dbg(USB, "Enter\n");
1508
1509 fwreq = brcmf_usb_prepare_fw_request(devinfo);
1510 if (!fwreq)
1511 return -ENOMEM;
1512
1513 ret = brcmf_fw_get_firmwares(&usb->dev, fwreq, brcmf_usb_probe_phase2);
1514 if (ret < 0)
1515 kfree(fwreq);
1516
1517 return ret;
1518 }
1519
1520 #define BRCMF_USB_DEVICE(dev_id) \
1521 { \
1522 USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id), \
1523 .driver_info = BRCMF_FWVENDOR_WCC \
1524 }
1525
1526 #define LINKSYS_USB_DEVICE(dev_id) \
1527 { \
1528 USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id), \
1529 .driver_info = BRCMF_FWVENDOR_WCC \
1530 }
1531
1532 #define CYPRESS_USB_DEVICE(dev_id) \
1533 { \
1534 USB_DEVICE(CY_USB_VENDOR_ID_CYPRESS, dev_id), \
1535 .driver_info = BRCMF_FWVENDOR_WCC \
1536 }
1537
1538 static const struct usb_device_id brcmf_usb_devid_table[] = {
1539 BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID),
1540 BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID),
1541 BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID),
1542 BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID),
1543 LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID),
1544 CYPRESS_USB_DEVICE(CY_USB_4373_DEVICE_ID),
1545 { USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) },
1546 /* special entry for device with firmware loaded and running */
1547 BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1548 CYPRESS_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1549 { /* end: all zeroes */ }
1550 };
1551
1552 MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1553
1554 static struct usb_driver brcmf_usbdrvr = {
1555 .name = KBUILD_MODNAME,
1556 .probe = brcmf_usb_probe,
1557 .disconnect = brcmf_usb_disconnect,
1558 .id_table = brcmf_usb_devid_table,
1559 .suspend = brcmf_usb_suspend,
1560 .resume = brcmf_usb_resume,
1561 .reset_resume = brcmf_usb_reset_resume,
1562 .supports_autosuspend = true,
1563 .disable_hub_initiated_lpm = 1,
1564 };
1565
brcmf_usb_reset_device(struct device * dev,void * notused)1566 static int brcmf_usb_reset_device(struct device *dev, void *notused)
1567 {
1568 /* device past is the usb interface so we
1569 * need to use parent here.
1570 */
1571 brcmf_dev_reset(dev->parent);
1572 return 0;
1573 }
1574
brcmf_usb_exit(void)1575 void brcmf_usb_exit(void)
1576 {
1577 struct device_driver *drv = &brcmf_usbdrvr.driver;
1578 int ret;
1579
1580 brcmf_dbg(USB, "Enter\n");
1581 ret = driver_for_each_device(drv, NULL, NULL,
1582 brcmf_usb_reset_device);
1583 if (ret)
1584 brcmf_err("failed to reset all usb devices %d\n", ret);
1585
1586 usb_deregister(&brcmf_usbdrvr);
1587 }
1588
brcmf_usb_register(void)1589 int brcmf_usb_register(void)
1590 {
1591 brcmf_dbg(USB, "Enter\n");
1592 return usb_register(&brcmf_usbdrvr);
1593 }
1594