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mwifiex: fix issues in driver unload path for USB chipsets
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / mwifiex / usb.c
1 /*
2 * Marvell Wireless LAN device driver: USB specific handling
3 *
4 * Copyright (C) 2012, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20 #include "main.h"
21 #include "usb.h"
22
23 #define USB_VERSION "1.0"
24
25 static const char usbdriver_name[] = "usb8797";
26
27 static struct mwifiex_if_ops usb_ops;
28 static struct semaphore add_remove_card_sem;
29 static struct usb_card_rec *usb_card;
30
31 static struct usb_device_id mwifiex_usb_table[] = {
32 {USB_DEVICE(USB8797_VID, USB8797_PID_1)},
33 {USB_DEVICE_AND_INTERFACE_INFO(USB8797_VID, USB8797_PID_2,
34 USB_CLASS_VENDOR_SPEC,
35 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
36 { } /* Terminating entry */
37 };
38
39 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
40
41 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
42
43 /* This function handles received packet. Necessary action is taken based on
44 * cmd/event/data.
45 */
46 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
47 struct sk_buff *skb, u8 ep)
48 {
49 struct device *dev = adapter->dev;
50 u32 recv_type;
51 __le32 tmp;
52 int ret;
53
54 if (adapter->hs_activated)
55 mwifiex_process_hs_config(adapter);
56
57 if (skb->len < INTF_HEADER_LEN) {
58 dev_err(dev, "%s: invalid skb->len\n", __func__);
59 return -1;
60 }
61
62 switch (ep) {
63 case MWIFIEX_USB_EP_CMD_EVENT:
64 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
65 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
66 recv_type = le32_to_cpu(tmp);
67 skb_pull(skb, INTF_HEADER_LEN);
68
69 switch (recv_type) {
70 case MWIFIEX_USB_TYPE_CMD:
71 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
72 dev_err(dev, "CMD: skb->len too large\n");
73 ret = -1;
74 goto exit_restore_skb;
75 } else if (!adapter->curr_cmd) {
76 dev_dbg(dev, "CMD: no curr_cmd\n");
77 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
78 mwifiex_process_sleep_confirm_resp(
79 adapter, skb->data,
80 skb->len);
81 ret = 0;
82 goto exit_restore_skb;
83 }
84 ret = -1;
85 goto exit_restore_skb;
86 }
87
88 adapter->curr_cmd->resp_skb = skb;
89 adapter->cmd_resp_received = true;
90 break;
91 case MWIFIEX_USB_TYPE_EVENT:
92 if (skb->len < sizeof(u32)) {
93 dev_err(dev, "EVENT: skb->len too small\n");
94 ret = -1;
95 goto exit_restore_skb;
96 }
97 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
98 adapter->event_cause = le32_to_cpu(tmp);
99 dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
100
101 if (skb->len > MAX_EVENT_SIZE) {
102 dev_err(dev, "EVENT: event body too large\n");
103 ret = -1;
104 goto exit_restore_skb;
105 }
106
107 memcpy(adapter->event_body, skb->data +
108 MWIFIEX_EVENT_HEADER_LEN, skb->len);
109
110 adapter->event_received = true;
111 adapter->event_skb = skb;
112 break;
113 default:
114 dev_err(dev, "unknown recv_type %#x\n", recv_type);
115 return -1;
116 }
117 break;
118 case MWIFIEX_USB_EP_DATA:
119 dev_dbg(dev, "%s: EP_DATA\n", __func__);
120 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
121 dev_err(dev, "DATA: skb->len too large\n");
122 return -1;
123 }
124 skb_queue_tail(&adapter->usb_rx_data_q, skb);
125 adapter->data_received = true;
126 break;
127 default:
128 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
129 return -1;
130 }
131
132 return -EINPROGRESS;
133
134 exit_restore_skb:
135 /* The buffer will be reused for further cmds/events */
136 skb_push(skb, INTF_HEADER_LEN);
137
138 return ret;
139 }
140
141 static void mwifiex_usb_rx_complete(struct urb *urb)
142 {
143 struct urb_context *context = (struct urb_context *)urb->context;
144 struct mwifiex_adapter *adapter = context->adapter;
145 struct sk_buff *skb = context->skb;
146 struct usb_card_rec *card;
147 int recv_length = urb->actual_length;
148 int size, status;
149
150 if (!adapter || !adapter->card) {
151 pr_err("mwifiex adapter or card structure is not valid\n");
152 return;
153 }
154
155 card = (struct usb_card_rec *)adapter->card;
156 if (card->rx_cmd_ep == context->ep)
157 atomic_dec(&card->rx_cmd_urb_pending);
158 else
159 atomic_dec(&card->rx_data_urb_pending);
160
161 if (recv_length) {
162 if (urb->status || (adapter->surprise_removed)) {
163 dev_err(adapter->dev,
164 "URB status is failed: %d\n", urb->status);
165 /* Do not free skb in case of command ep */
166 if (card->rx_cmd_ep != context->ep)
167 dev_kfree_skb_any(skb);
168 goto setup_for_next;
169 }
170 if (skb->len > recv_length)
171 skb_trim(skb, recv_length);
172 else
173 skb_put(skb, recv_length - skb->len);
174
175 atomic_inc(&adapter->rx_pending);
176 status = mwifiex_usb_recv(adapter, skb, context->ep);
177
178 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
179 recv_length, status);
180 if (status == -EINPROGRESS) {
181 queue_work(adapter->workqueue, &adapter->main_work);
182
183 /* urb for data_ep is re-submitted now;
184 * urb for cmd_ep will be re-submitted in callback
185 * mwifiex_usb_recv_complete
186 */
187 if (card->rx_cmd_ep == context->ep)
188 return;
189 } else {
190 atomic_dec(&adapter->rx_pending);
191 if (status == -1)
192 dev_err(adapter->dev,
193 "received data processing failed!\n");
194
195 /* Do not free skb in case of command ep */
196 if (card->rx_cmd_ep != context->ep)
197 dev_kfree_skb_any(skb);
198 }
199 } else if (urb->status) {
200 if (!adapter->is_suspended) {
201 dev_warn(adapter->dev,
202 "Card is removed: %d\n", urb->status);
203 adapter->surprise_removed = true;
204 }
205 dev_kfree_skb_any(skb);
206 return;
207 } else {
208 /* Do not free skb in case of command ep */
209 if (card->rx_cmd_ep != context->ep)
210 dev_kfree_skb_any(skb);
211
212 /* fall through setup_for_next */
213 }
214
215 setup_for_next:
216 if (card->rx_cmd_ep == context->ep)
217 size = MWIFIEX_RX_CMD_BUF_SIZE;
218 else
219 size = MWIFIEX_RX_DATA_BUF_SIZE;
220
221 mwifiex_usb_submit_rx_urb(context, size);
222
223 return;
224 }
225
226 static void mwifiex_usb_tx_complete(struct urb *urb)
227 {
228 struct urb_context *context = (struct urb_context *)(urb->context);
229 struct mwifiex_adapter *adapter = context->adapter;
230 struct usb_card_rec *card = adapter->card;
231
232 dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
233
234 if (context->ep == card->tx_cmd_ep) {
235 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
236 atomic_dec(&card->tx_cmd_urb_pending);
237 adapter->cmd_sent = false;
238 } else {
239 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
240 atomic_dec(&card->tx_data_urb_pending);
241 mwifiex_write_data_complete(adapter, context->skb, 0,
242 urb->status ? -1 : 0);
243 }
244
245 queue_work(adapter->workqueue, &adapter->main_work);
246
247 return;
248 }
249
250 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
251 {
252 struct mwifiex_adapter *adapter = ctx->adapter;
253 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
254
255 if (card->rx_cmd_ep != ctx->ep) {
256 ctx->skb = dev_alloc_skb(size);
257 if (!ctx->skb) {
258 dev_err(adapter->dev,
259 "%s: dev_alloc_skb failed\n", __func__);
260 return -ENOMEM;
261 }
262 }
263
264 usb_fill_bulk_urb(ctx->urb, card->udev,
265 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
266 size, mwifiex_usb_rx_complete, (void *)ctx);
267
268 if (card->rx_cmd_ep == ctx->ep)
269 atomic_inc(&card->rx_cmd_urb_pending);
270 else
271 atomic_inc(&card->rx_data_urb_pending);
272
273 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
274 dev_err(adapter->dev, "usb_submit_urb failed\n");
275 dev_kfree_skb_any(ctx->skb);
276 ctx->skb = NULL;
277
278 if (card->rx_cmd_ep == ctx->ep)
279 atomic_dec(&card->rx_cmd_urb_pending);
280 else
281 atomic_dec(&card->rx_data_urb_pending);
282
283 return -1;
284 }
285
286 return 0;
287 }
288
289 static void mwifiex_usb_free(struct usb_card_rec *card)
290 {
291 int i;
292
293 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
294 usb_kill_urb(card->rx_cmd.urb);
295
296 usb_free_urb(card->rx_cmd.urb);
297 card->rx_cmd.urb = NULL;
298
299 if (atomic_read(&card->rx_data_urb_pending))
300 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
301 if (card->rx_data_list[i].urb)
302 usb_kill_urb(card->rx_data_list[i].urb);
303
304 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
305 usb_free_urb(card->rx_data_list[i].urb);
306 card->rx_data_list[i].urb = NULL;
307 }
308
309 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
310 usb_free_urb(card->tx_data_list[i].urb);
311 card->tx_data_list[i].urb = NULL;
312 }
313
314 usb_free_urb(card->tx_cmd.urb);
315 card->tx_cmd.urb = NULL;
316
317 return;
318 }
319
320 /* This function probes an mwifiex device and registers it. It allocates
321 * the card structure, initiates the device registration and initialization
322 * procedure by adding a logical interface.
323 */
324 static int mwifiex_usb_probe(struct usb_interface *intf,
325 const struct usb_device_id *id)
326 {
327 struct usb_device *udev = interface_to_usbdev(intf);
328 struct usb_host_interface *iface_desc = intf->cur_altsetting;
329 struct usb_endpoint_descriptor *epd;
330 int ret, i;
331 struct usb_card_rec *card;
332 u16 id_vendor, id_product, bcd_device, bcd_usb;
333
334 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
335 if (!card)
336 return -ENOMEM;
337
338 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
339 id_product = le16_to_cpu(udev->descriptor.idProduct);
340 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
341 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
342 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
343 id_vendor, id_product, bcd_device);
344
345 /* PID_1 is used for firmware downloading only */
346 if (id_product == USB8797_PID_1)
347 card->usb_boot_state = USB8797_FW_DNLD;
348 else
349 card->usb_boot_state = USB8797_FW_READY;
350
351 card->udev = udev;
352 card->intf = intf;
353
354 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
355 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
356 udev->descriptor.bDeviceSubClass,
357 udev->descriptor.bDeviceProtocol);
358
359 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
360 epd = &iface_desc->endpoint[i].desc;
361 if (usb_endpoint_dir_in(epd) &&
362 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
363 usb_endpoint_xfer_bulk(epd)) {
364 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
365 le16_to_cpu(epd->wMaxPacketSize),
366 epd->bEndpointAddress);
367 card->rx_cmd_ep = usb_endpoint_num(epd);
368 atomic_set(&card->rx_cmd_urb_pending, 0);
369 }
370 if (usb_endpoint_dir_in(epd) &&
371 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
372 usb_endpoint_xfer_bulk(epd)) {
373 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
374 le16_to_cpu(epd->wMaxPacketSize),
375 epd->bEndpointAddress);
376 card->rx_data_ep = usb_endpoint_num(epd);
377 atomic_set(&card->rx_data_urb_pending, 0);
378 }
379 if (usb_endpoint_dir_out(epd) &&
380 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
381 usb_endpoint_xfer_bulk(epd)) {
382 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
383 le16_to_cpu(epd->wMaxPacketSize),
384 epd->bEndpointAddress);
385 card->tx_data_ep = usb_endpoint_num(epd);
386 atomic_set(&card->tx_data_urb_pending, 0);
387 }
388 if (usb_endpoint_dir_out(epd) &&
389 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
390 usb_endpoint_xfer_bulk(epd)) {
391 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
392 le16_to_cpu(epd->wMaxPacketSize),
393 epd->bEndpointAddress);
394 card->tx_cmd_ep = usb_endpoint_num(epd);
395 atomic_set(&card->tx_cmd_urb_pending, 0);
396 card->bulk_out_maxpktsize =
397 le16_to_cpu(epd->wMaxPacketSize);
398 }
399 }
400
401 usb_set_intfdata(intf, card);
402
403 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
404 MWIFIEX_USB);
405 if (ret) {
406 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
407 usb_reset_device(udev);
408 kfree(card);
409 return ret;
410 }
411
412 usb_get_dev(udev);
413
414 return 0;
415 }
416
417 /* Kernel needs to suspend all functions separately. Therefore all
418 * registered functions must have drivers with suspend and resume
419 * methods. Failing that the kernel simply removes the whole card.
420 *
421 * If already not suspended, this function allocates and sends a
422 * 'host sleep activate' request to the firmware and turns off the traffic.
423 */
424 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
425 {
426 struct usb_card_rec *card = usb_get_intfdata(intf);
427 struct mwifiex_adapter *adapter;
428 int i;
429
430 if (!card || !card->adapter) {
431 pr_err("%s: card or card->adapter is NULL\n", __func__);
432 return 0;
433 }
434 adapter = card->adapter;
435
436 if (unlikely(adapter->is_suspended))
437 dev_warn(adapter->dev, "Device already suspended\n");
438
439 mwifiex_enable_hs(adapter);
440
441 /* 'is_suspended' flag indicates device is suspended.
442 * It must be set here before the usb_kill_urb() calls. Reason
443 * is in the complete handlers, urb->status(= -ENOENT) and
444 * this flag is used in combination to distinguish between a
445 * 'suspended' state and a 'disconnect' one.
446 */
447 adapter->is_suspended = true;
448
449 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
450 usb_kill_urb(card->rx_cmd.urb);
451
452 if (atomic_read(&card->rx_data_urb_pending))
453 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
454 if (card->rx_data_list[i].urb)
455 usb_kill_urb(card->rx_data_list[i].urb);
456
457 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
458 if (card->tx_data_list[i].urb)
459 usb_kill_urb(card->tx_data_list[i].urb);
460
461 if (card->tx_cmd.urb)
462 usb_kill_urb(card->tx_cmd.urb);
463
464 return 0;
465 }
466
467 /* Kernel needs to suspend all functions separately. Therefore all
468 * registered functions must have drivers with suspend and resume
469 * methods. Failing that the kernel simply removes the whole card.
470 *
471 * If already not resumed, this function turns on the traffic and
472 * sends a 'host sleep cancel' request to the firmware.
473 */
474 static int mwifiex_usb_resume(struct usb_interface *intf)
475 {
476 struct usb_card_rec *card = usb_get_intfdata(intf);
477 struct mwifiex_adapter *adapter;
478 int i;
479
480 if (!card || !card->adapter) {
481 pr_err("%s: card or card->adapter is NULL\n", __func__);
482 return 0;
483 }
484 adapter = card->adapter;
485
486 if (unlikely(!adapter->is_suspended)) {
487 dev_warn(adapter->dev, "Device already resumed\n");
488 return 0;
489 }
490
491 /* Indicate device resumed. The netdev queue will be resumed only
492 * after the urbs have been re-submitted
493 */
494 adapter->is_suspended = false;
495
496 if (!atomic_read(&card->rx_data_urb_pending))
497 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
498 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
499 MWIFIEX_RX_DATA_BUF_SIZE);
500
501 if (!atomic_read(&card->rx_cmd_urb_pending)) {
502 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
503 if (card->rx_cmd.skb)
504 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
505 MWIFIEX_RX_CMD_BUF_SIZE);
506 }
507
508 /* Disable Host Sleep */
509 if (adapter->hs_activated)
510 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
511 MWIFIEX_BSS_ROLE_ANY),
512 MWIFIEX_ASYNC_CMD);
513
514 #ifdef CONFIG_PM
515 /* Resume handler may be called due to remote wakeup,
516 * force to exit suspend anyway
517 */
518 usb_disable_autosuspend(card->udev);
519 #endif /* CONFIG_PM */
520
521 return 0;
522 }
523
524 static void mwifiex_usb_disconnect(struct usb_interface *intf)
525 {
526 struct usb_card_rec *card = usb_get_intfdata(intf);
527
528 if (!card) {
529 pr_err("%s: card is NULL\n", __func__);
530 return;
531 }
532
533 mwifiex_usb_free(card);
534
535 if (card->adapter) {
536 struct mwifiex_adapter *adapter = card->adapter;
537
538 if (!adapter->priv_num)
539 return;
540
541 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
542 mwifiex_remove_card(adapter, &add_remove_card_sem);
543 }
544
545 usb_set_intfdata(intf, NULL);
546 usb_put_dev(interface_to_usbdev(intf));
547 kfree(card);
548 usb_card = NULL;
549
550 return;
551 }
552
553 static struct usb_driver mwifiex_usb_driver = {
554 .name = usbdriver_name,
555 .probe = mwifiex_usb_probe,
556 .disconnect = mwifiex_usb_disconnect,
557 .id_table = mwifiex_usb_table,
558 .suspend = mwifiex_usb_suspend,
559 .resume = mwifiex_usb_resume,
560 .supports_autosuspend = 1,
561 };
562
563 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
564 {
565 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
566 int i;
567
568 card->tx_cmd.adapter = adapter;
569 card->tx_cmd.ep = card->tx_cmd_ep;
570
571 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
572 if (!card->tx_cmd.urb) {
573 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
574 return -ENOMEM;
575 }
576
577 card->tx_data_ix = 0;
578
579 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
580 card->tx_data_list[i].adapter = adapter;
581 card->tx_data_list[i].ep = card->tx_data_ep;
582
583 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
584 if (!card->tx_data_list[i].urb) {
585 dev_err(adapter->dev,
586 "tx_data_list[] urb allocation failed\n");
587 return -ENOMEM;
588 }
589 }
590
591 return 0;
592 }
593
594 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
595 {
596 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
597 int i;
598
599 card->rx_cmd.adapter = adapter;
600 card->rx_cmd.ep = card->rx_cmd_ep;
601
602 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
603 if (!card->rx_cmd.urb) {
604 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
605 return -ENOMEM;
606 }
607
608 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
609 if (!card->rx_cmd.skb) {
610 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
611 return -ENOMEM;
612 }
613
614 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
615 return -1;
616
617 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
618 card->rx_data_list[i].adapter = adapter;
619 card->rx_data_list[i].ep = card->rx_data_ep;
620
621 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
622 if (!card->rx_data_list[i].urb) {
623 dev_err(adapter->dev,
624 "rx_data_list[] urb allocation failed\n");
625 return -1;
626 }
627 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
628 MWIFIEX_RX_DATA_BUF_SIZE))
629 return -1;
630 }
631
632 return 0;
633 }
634
635 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
636 u32 *len, u8 ep, u32 timeout)
637 {
638 struct usb_card_rec *card = adapter->card;
639 int actual_length, ret;
640
641 if (!(*len % card->bulk_out_maxpktsize))
642 (*len)++;
643
644 /* Send the data block */
645 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
646 *len, &actual_length, timeout);
647 if (ret) {
648 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
649 return ret;
650 }
651
652 *len = actual_length;
653
654 return ret;
655 }
656
657 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
658 u32 *len, u8 ep, u32 timeout)
659 {
660 struct usb_card_rec *card = adapter->card;
661 int actual_length, ret;
662
663 /* Receive the data response */
664 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
665 *len, &actual_length, timeout);
666 if (ret) {
667 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
668 return ret;
669 }
670
671 *len = actual_length;
672
673 return ret;
674 }
675
676 /* This function write a command/data packet to card. */
677 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
678 struct sk_buff *skb,
679 struct mwifiex_tx_param *tx_param)
680 {
681 struct usb_card_rec *card = adapter->card;
682 struct urb_context *context;
683 u8 *data = (u8 *)skb->data;
684 struct urb *tx_urb;
685
686 if (adapter->is_suspended) {
687 dev_err(adapter->dev,
688 "%s: not allowed while suspended\n", __func__);
689 return -1;
690 }
691
692 if (adapter->surprise_removed) {
693 dev_err(adapter->dev, "%s: device removed\n", __func__);
694 return -1;
695 }
696
697 if (ep == card->tx_data_ep &&
698 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
699 return -EBUSY;
700 }
701
702 dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
703
704 if (ep == card->tx_cmd_ep) {
705 context = &card->tx_cmd;
706 } else {
707 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
708 card->tx_data_ix = 0;
709 context = &card->tx_data_list[card->tx_data_ix++];
710 }
711
712 context->adapter = adapter;
713 context->ep = ep;
714 context->skb = skb;
715 tx_urb = context->urb;
716
717 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
718 data, skb->len, mwifiex_usb_tx_complete,
719 (void *)context);
720
721 tx_urb->transfer_flags |= URB_ZERO_PACKET;
722
723 if (ep == card->tx_cmd_ep)
724 atomic_inc(&card->tx_cmd_urb_pending);
725 else
726 atomic_inc(&card->tx_data_urb_pending);
727
728 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
729 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
730 if (ep == card->tx_cmd_ep) {
731 atomic_dec(&card->tx_cmd_urb_pending);
732 } else {
733 atomic_dec(&card->tx_data_urb_pending);
734 if (card->tx_data_ix)
735 card->tx_data_ix--;
736 else
737 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
738 }
739
740 return -1;
741 } else {
742 if (ep == card->tx_data_ep &&
743 atomic_read(&card->tx_data_urb_pending) ==
744 MWIFIEX_TX_DATA_URB)
745 return -ENOSR;
746 }
747
748 return -EINPROGRESS;
749 }
750
751 /* This function register usb device and initialize parameter. */
752 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
753 {
754 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
755
756 card->adapter = adapter;
757 adapter->dev = &card->udev->dev;
758 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
759 usb_card = card;
760
761 return 0;
762 }
763
764 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
765 {
766 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
767
768 card->adapter = NULL;
769 }
770
771 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
772 struct mwifiex_fw_image *fw)
773 {
774 int ret = 0;
775 u8 *firmware = fw->fw_buf, *recv_buff;
776 u32 retries = USB8797_FW_MAX_RETRY, dlen;
777 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
778 struct fw_data *fwdata;
779 struct fw_sync_header sync_fw;
780 u8 check_winner = 1;
781
782 if (!firmware) {
783 dev_err(adapter->dev,
784 "No firmware image found! Terminating download\n");
785 ret = -1;
786 goto fw_exit;
787 }
788
789 /* Allocate memory for transmit */
790 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
791 if (!fwdata)
792 goto fw_exit;
793
794 /* Allocate memory for receive */
795 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
796 if (!recv_buff)
797 goto cleanup;
798
799 do {
800 /* Send pseudo data to check winner status first */
801 if (check_winner) {
802 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
803 dlen = 0;
804 } else {
805 /* copy the header of the fw_data to get the length */
806 memcpy(&fwdata->fw_hdr, &firmware[tlen],
807 sizeof(struct fw_header));
808
809 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
810 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
811 tlen += sizeof(struct fw_header);
812
813 memcpy(fwdata->data, &firmware[tlen], dlen);
814
815 fwdata->seq_num = cpu_to_le32(fw_seqnum);
816 tlen += dlen;
817 }
818
819 /* If the send/receive fails or CRC occurs then retry */
820 while (retries--) {
821 u8 *buf = (u8 *)fwdata;
822 u32 len = FW_DATA_XMIT_SIZE;
823
824 /* send the firmware block */
825 ret = mwifiex_write_data_sync(adapter, buf, &len,
826 MWIFIEX_USB_EP_CMD_EVENT,
827 MWIFIEX_USB_TIMEOUT);
828 if (ret) {
829 dev_err(adapter->dev,
830 "write_data_sync: failed: %d\n", ret);
831 continue;
832 }
833
834 buf = recv_buff;
835 len = FW_DNLD_RX_BUF_SIZE;
836
837 /* Receive the firmware block response */
838 ret = mwifiex_read_data_sync(adapter, buf, &len,
839 MWIFIEX_USB_EP_CMD_EVENT,
840 MWIFIEX_USB_TIMEOUT);
841 if (ret) {
842 dev_err(adapter->dev,
843 "read_data_sync: failed: %d\n", ret);
844 continue;
845 }
846
847 memcpy(&sync_fw, recv_buff,
848 sizeof(struct fw_sync_header));
849
850 /* check 1st firmware block resp for highest bit set */
851 if (check_winner) {
852 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
853 dev_warn(adapter->dev,
854 "USB is not the winner %#x\n",
855 sync_fw.cmd);
856
857 /* returning success */
858 ret = 0;
859 goto cleanup;
860 }
861
862 dev_dbg(adapter->dev,
863 "USB is the winner, start to download FW\n");
864
865 check_winner = 0;
866 break;
867 }
868
869 /* check the firmware block response for CRC errors */
870 if (sync_fw.cmd) {
871 dev_err(adapter->dev,
872 "FW received block with CRC %#x\n",
873 sync_fw.cmd);
874 ret = -1;
875 continue;
876 }
877
878 retries = USB8797_FW_MAX_RETRY;
879 break;
880 }
881 fw_seqnum++;
882 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
883
884 cleanup:
885 dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
886
887 kfree(recv_buff);
888 kfree(fwdata);
889
890 if (retries)
891 ret = 0;
892 fw_exit:
893 return ret;
894 }
895
896 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
897 struct mwifiex_fw_image *fw)
898 {
899 int ret;
900 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
901
902 if (card->usb_boot_state == USB8797_FW_DNLD) {
903 ret = mwifiex_prog_fw_w_helper(adapter, fw);
904 if (ret)
905 return -1;
906
907 /* Boot state changes after successful firmware download */
908 if (card->usb_boot_state == USB8797_FW_DNLD)
909 return -1;
910 }
911
912 ret = mwifiex_usb_rx_init(adapter);
913 if (!ret)
914 ret = mwifiex_usb_tx_init(adapter);
915
916 return ret;
917 }
918
919 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
920 {
921 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
922
923 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
924 if ((ep == card->rx_cmd_ep) &&
925 (!atomic_read(&card->rx_cmd_urb_pending)))
926 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
927 MWIFIEX_RX_CMD_BUF_SIZE);
928
929 return;
930 }
931
932 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
933 struct sk_buff *skb)
934 {
935 atomic_dec(&adapter->rx_pending);
936 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
937
938 return 0;
939 }
940
941 static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter,
942 struct sk_buff *skb)
943 {
944 atomic_dec(&adapter->rx_pending);
945 dev_kfree_skb_any(skb);
946
947 return 0;
948 }
949
950 /* This function wakes up the card. */
951 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
952 {
953 /* Simulation of HS_AWAKE event */
954 adapter->pm_wakeup_fw_try = false;
955 adapter->pm_wakeup_card_req = false;
956 adapter->ps_state = PS_STATE_AWAKE;
957
958 return 0;
959 }
960
961 static struct mwifiex_if_ops usb_ops = {
962 .register_dev = mwifiex_register_dev,
963 .unregister_dev = mwifiex_unregister_dev,
964 .wakeup = mwifiex_pm_wakeup_card,
965 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
966
967 /* USB specific */
968 .dnld_fw = mwifiex_usb_dnld_fw,
969 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
970 .event_complete = mwifiex_usb_cmd_event_complete,
971 .data_complete = mwifiex_usb_data_complete,
972 .host_to_card = mwifiex_usb_host_to_card,
973 };
974
975 /* This function initializes the USB driver module.
976 *
977 * This initiates the semaphore and registers the device with
978 * USB bus.
979 */
980 static int mwifiex_usb_init_module(void)
981 {
982 int ret;
983
984 pr_debug("Marvell USB8797 Driver\n");
985
986 sema_init(&add_remove_card_sem, 1);
987
988 ret = usb_register(&mwifiex_usb_driver);
989 if (ret)
990 pr_err("Driver register failed!\n");
991 else
992 pr_debug("info: Driver registered successfully!\n");
993
994 return ret;
995 }
996
997 /* This function cleans up the USB driver.
998 *
999 * The following major steps are followed in .disconnect for cleanup:
1000 * - Resume the device if its suspended
1001 * - Disconnect the device if connected
1002 * - Shutdown the firmware
1003 * - Unregister the device from USB bus.
1004 */
1005 static void mwifiex_usb_cleanup_module(void)
1006 {
1007 if (!down_interruptible(&add_remove_card_sem))
1008 up(&add_remove_card_sem);
1009
1010 if (usb_card && usb_card->adapter) {
1011 struct mwifiex_adapter *adapter = usb_card->adapter;
1012 int i;
1013
1014 /* In case driver is removed when asynchronous FW downloading is
1015 * in progress
1016 */
1017 wait_for_completion(&adapter->fw_load);
1018
1019 #ifdef CONFIG_PM
1020 if (adapter->is_suspended)
1021 mwifiex_usb_resume(usb_card->intf);
1022 #endif
1023 for (i = 0; i < adapter->priv_num; i++)
1024 if ((GET_BSS_ROLE(adapter->priv[i]) ==
1025 MWIFIEX_BSS_ROLE_STA) &&
1026 adapter->priv[i]->media_connected)
1027 mwifiex_deauthenticate(adapter->priv[i], NULL);
1028
1029 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
1030 MWIFIEX_BSS_ROLE_ANY),
1031 MWIFIEX_FUNC_SHUTDOWN);
1032 }
1033
1034 usb_deregister(&mwifiex_usb_driver);
1035 }
1036
1037 module_init(mwifiex_usb_init_module);
1038 module_exit(mwifiex_usb_cleanup_module);
1039
1040 MODULE_AUTHOR("Marvell International Ltd.");
1041 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1042 MODULE_VERSION(USB_VERSION);
1043 MODULE_LICENSE("GPL v2");
1044 MODULE_FIRMWARE("mrvl/usb8797_uapsta.bin");
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