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Merge branch 'for-davem' into for-next
[deliverable/linux.git] / drivers / net / wireless / mwifiex / usb.c
1 /*
2 * Marvell Wireless LAN device driver: USB specific handling
3 *
4 * Copyright (C) 2012-2014, 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 u8 user_rmmod;
26 static struct mwifiex_if_ops usb_ops;
27 static struct semaphore add_remove_card_sem;
28
29 static struct usb_device_id mwifiex_usb_table[] = {
30 /* 8766 */
31 {USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
32 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
33 USB_CLASS_VENDOR_SPEC,
34 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
35 /* 8797 */
36 {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
37 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
38 USB_CLASS_VENDOR_SPEC,
39 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
40 /* 8801 */
41 {USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
42 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
43 USB_CLASS_VENDOR_SPEC,
44 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
45 /* 8897 */
46 {USB_DEVICE(USB8XXX_VID, USB8897_PID_1)},
47 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8897_PID_2,
48 USB_CLASS_VENDOR_SPEC,
49 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
50 { } /* Terminating entry */
51 };
52
53 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
54
55 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
56
57 /* This function handles received packet. Necessary action is taken based on
58 * cmd/event/data.
59 */
60 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
61 struct sk_buff *skb, u8 ep)
62 {
63 struct device *dev = adapter->dev;
64 u32 recv_type;
65 __le32 tmp;
66 int ret;
67
68 if (adapter->hs_activated)
69 mwifiex_process_hs_config(adapter);
70
71 if (skb->len < INTF_HEADER_LEN) {
72 dev_err(dev, "%s: invalid skb->len\n", __func__);
73 return -1;
74 }
75
76 switch (ep) {
77 case MWIFIEX_USB_EP_CMD_EVENT:
78 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
79 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
80 recv_type = le32_to_cpu(tmp);
81 skb_pull(skb, INTF_HEADER_LEN);
82
83 switch (recv_type) {
84 case MWIFIEX_USB_TYPE_CMD:
85 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
86 dev_err(dev, "CMD: skb->len too large\n");
87 ret = -1;
88 goto exit_restore_skb;
89 } else if (!adapter->curr_cmd) {
90 dev_dbg(dev, "CMD: no curr_cmd\n");
91 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
92 mwifiex_process_sleep_confirm_resp(
93 adapter, skb->data,
94 skb->len);
95 ret = 0;
96 goto exit_restore_skb;
97 }
98 ret = -1;
99 goto exit_restore_skb;
100 }
101
102 adapter->curr_cmd->resp_skb = skb;
103 adapter->cmd_resp_received = true;
104 break;
105 case MWIFIEX_USB_TYPE_EVENT:
106 if (skb->len < sizeof(u32)) {
107 dev_err(dev, "EVENT: skb->len too small\n");
108 ret = -1;
109 goto exit_restore_skb;
110 }
111 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
112 adapter->event_cause = le32_to_cpu(tmp);
113 dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
114
115 if (skb->len > MAX_EVENT_SIZE) {
116 dev_err(dev, "EVENT: event body too large\n");
117 ret = -1;
118 goto exit_restore_skb;
119 }
120
121 memcpy(adapter->event_body, skb->data +
122 MWIFIEX_EVENT_HEADER_LEN, skb->len);
123
124 adapter->event_received = true;
125 adapter->event_skb = skb;
126 break;
127 default:
128 dev_err(dev, "unknown recv_type %#x\n", recv_type);
129 return -1;
130 }
131 break;
132 case MWIFIEX_USB_EP_DATA:
133 dev_dbg(dev, "%s: EP_DATA\n", __func__);
134 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
135 dev_err(dev, "DATA: skb->len too large\n");
136 return -1;
137 }
138
139 skb_queue_tail(&adapter->rx_data_q, skb);
140 adapter->data_received = true;
141 atomic_inc(&adapter->rx_pending);
142 break;
143 default:
144 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
145 return -1;
146 }
147
148 return -EINPROGRESS;
149
150 exit_restore_skb:
151 /* The buffer will be reused for further cmds/events */
152 skb_push(skb, INTF_HEADER_LEN);
153
154 return ret;
155 }
156
157 static void mwifiex_usb_rx_complete(struct urb *urb)
158 {
159 struct urb_context *context = (struct urb_context *)urb->context;
160 struct mwifiex_adapter *adapter = context->adapter;
161 struct sk_buff *skb = context->skb;
162 struct usb_card_rec *card;
163 int recv_length = urb->actual_length;
164 int size, status;
165
166 if (!adapter || !adapter->card) {
167 pr_err("mwifiex adapter or card structure is not valid\n");
168 return;
169 }
170
171 card = (struct usb_card_rec *)adapter->card;
172 if (card->rx_cmd_ep == context->ep)
173 atomic_dec(&card->rx_cmd_urb_pending);
174 else
175 atomic_dec(&card->rx_data_urb_pending);
176
177 if (recv_length) {
178 if (urb->status || (adapter->surprise_removed)) {
179 dev_err(adapter->dev,
180 "URB status is failed: %d\n", urb->status);
181 /* Do not free skb in case of command ep */
182 if (card->rx_cmd_ep != context->ep)
183 dev_kfree_skb_any(skb);
184 goto setup_for_next;
185 }
186 if (skb->len > recv_length)
187 skb_trim(skb, recv_length);
188 else
189 skb_put(skb, recv_length - skb->len);
190
191 status = mwifiex_usb_recv(adapter, skb, context->ep);
192
193 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
194 recv_length, status);
195 if (status == -EINPROGRESS) {
196 mwifiex_queue_main_work(adapter);
197
198 /* urb for data_ep is re-submitted now;
199 * urb for cmd_ep will be re-submitted in callback
200 * mwifiex_usb_recv_complete
201 */
202 if (card->rx_cmd_ep == context->ep)
203 return;
204 } else {
205 if (status == -1)
206 dev_err(adapter->dev,
207 "received data processing failed!\n");
208
209 /* Do not free skb in case of command ep */
210 if (card->rx_cmd_ep != context->ep)
211 dev_kfree_skb_any(skb);
212 }
213 } else if (urb->status) {
214 if (!adapter->is_suspended) {
215 dev_warn(adapter->dev,
216 "Card is removed: %d\n", urb->status);
217 adapter->surprise_removed = true;
218 }
219 dev_kfree_skb_any(skb);
220 return;
221 } else {
222 /* Do not free skb in case of command ep */
223 if (card->rx_cmd_ep != context->ep)
224 dev_kfree_skb_any(skb);
225
226 /* fall through setup_for_next */
227 }
228
229 setup_for_next:
230 if (card->rx_cmd_ep == context->ep)
231 size = MWIFIEX_RX_CMD_BUF_SIZE;
232 else
233 size = MWIFIEX_RX_DATA_BUF_SIZE;
234
235 if (card->rx_cmd_ep == context->ep) {
236 mwifiex_usb_submit_rx_urb(context, size);
237 } else {
238 context->skb = NULL;
239 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING)
240 mwifiex_usb_submit_rx_urb(context, size);
241 }
242
243 return;
244 }
245
246 static void mwifiex_usb_tx_complete(struct urb *urb)
247 {
248 struct urb_context *context = (struct urb_context *)(urb->context);
249 struct mwifiex_adapter *adapter = context->adapter;
250 struct usb_card_rec *card = adapter->card;
251
252 dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
253
254 if (context->ep == card->tx_cmd_ep) {
255 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
256 atomic_dec(&card->tx_cmd_urb_pending);
257 adapter->cmd_sent = false;
258 } else {
259 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
260 atomic_dec(&card->tx_data_urb_pending);
261 mwifiex_write_data_complete(adapter, context->skb, 0,
262 urb->status ? -1 : 0);
263 }
264
265 mwifiex_queue_main_work(adapter);
266
267 return;
268 }
269
270 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
271 {
272 struct mwifiex_adapter *adapter = ctx->adapter;
273 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
274
275 if (card->rx_cmd_ep != ctx->ep) {
276 ctx->skb = dev_alloc_skb(size);
277 if (!ctx->skb) {
278 dev_err(adapter->dev,
279 "%s: dev_alloc_skb failed\n", __func__);
280 return -ENOMEM;
281 }
282 }
283
284 usb_fill_bulk_urb(ctx->urb, card->udev,
285 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
286 size, mwifiex_usb_rx_complete, (void *)ctx);
287
288 if (card->rx_cmd_ep == ctx->ep)
289 atomic_inc(&card->rx_cmd_urb_pending);
290 else
291 atomic_inc(&card->rx_data_urb_pending);
292
293 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
294 dev_err(adapter->dev, "usb_submit_urb failed\n");
295 dev_kfree_skb_any(ctx->skb);
296 ctx->skb = NULL;
297
298 if (card->rx_cmd_ep == ctx->ep)
299 atomic_dec(&card->rx_cmd_urb_pending);
300 else
301 atomic_dec(&card->rx_data_urb_pending);
302
303 return -1;
304 }
305
306 return 0;
307 }
308
309 static void mwifiex_usb_free(struct usb_card_rec *card)
310 {
311 int i;
312
313 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
314 usb_kill_urb(card->rx_cmd.urb);
315
316 usb_free_urb(card->rx_cmd.urb);
317 card->rx_cmd.urb = NULL;
318
319 if (atomic_read(&card->rx_data_urb_pending))
320 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
321 if (card->rx_data_list[i].urb)
322 usb_kill_urb(card->rx_data_list[i].urb);
323
324 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
325 usb_free_urb(card->rx_data_list[i].urb);
326 card->rx_data_list[i].urb = NULL;
327 }
328
329 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
330 usb_free_urb(card->tx_data_list[i].urb);
331 card->tx_data_list[i].urb = NULL;
332 }
333
334 usb_free_urb(card->tx_cmd.urb);
335 card->tx_cmd.urb = NULL;
336
337 return;
338 }
339
340 /* This function probes an mwifiex device and registers it. It allocates
341 * the card structure, initiates the device registration and initialization
342 * procedure by adding a logical interface.
343 */
344 static int mwifiex_usb_probe(struct usb_interface *intf,
345 const struct usb_device_id *id)
346 {
347 struct usb_device *udev = interface_to_usbdev(intf);
348 struct usb_host_interface *iface_desc = intf->cur_altsetting;
349 struct usb_endpoint_descriptor *epd;
350 int ret, i;
351 struct usb_card_rec *card;
352 u16 id_vendor, id_product, bcd_device, bcd_usb;
353
354 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
355 if (!card)
356 return -ENOMEM;
357
358 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
359 id_product = le16_to_cpu(udev->descriptor.idProduct);
360 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
361 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
362 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
363 id_vendor, id_product, bcd_device);
364
365 /* PID_1 is used for firmware downloading only */
366 switch (id_product) {
367 case USB8766_PID_1:
368 case USB8797_PID_1:
369 case USB8801_PID_1:
370 case USB8897_PID_1:
371 card->usb_boot_state = USB8XXX_FW_DNLD;
372 break;
373 case USB8766_PID_2:
374 case USB8797_PID_2:
375 case USB8801_PID_2:
376 case USB8897_PID_2:
377 card->usb_boot_state = USB8XXX_FW_READY;
378 break;
379 default:
380 pr_warn("unknown id_product %#x\n", id_product);
381 card->usb_boot_state = USB8XXX_FW_DNLD;
382 break;
383 }
384
385 card->udev = udev;
386 card->intf = intf;
387
388 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
389 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
390 udev->descriptor.bDeviceSubClass,
391 udev->descriptor.bDeviceProtocol);
392
393 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
394 epd = &iface_desc->endpoint[i].desc;
395 if (usb_endpoint_dir_in(epd) &&
396 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
397 usb_endpoint_xfer_bulk(epd)) {
398 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
399 le16_to_cpu(epd->wMaxPacketSize),
400 epd->bEndpointAddress);
401 card->rx_cmd_ep = usb_endpoint_num(epd);
402 atomic_set(&card->rx_cmd_urb_pending, 0);
403 }
404 if (usb_endpoint_dir_in(epd) &&
405 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
406 usb_endpoint_xfer_bulk(epd)) {
407 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
408 le16_to_cpu(epd->wMaxPacketSize),
409 epd->bEndpointAddress);
410 card->rx_data_ep = usb_endpoint_num(epd);
411 atomic_set(&card->rx_data_urb_pending, 0);
412 }
413 if (usb_endpoint_dir_out(epd) &&
414 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
415 usb_endpoint_xfer_bulk(epd)) {
416 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
417 le16_to_cpu(epd->wMaxPacketSize),
418 epd->bEndpointAddress);
419 card->tx_data_ep = usb_endpoint_num(epd);
420 atomic_set(&card->tx_data_urb_pending, 0);
421 }
422 if (usb_endpoint_dir_out(epd) &&
423 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
424 usb_endpoint_xfer_bulk(epd)) {
425 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
426 le16_to_cpu(epd->wMaxPacketSize),
427 epd->bEndpointAddress);
428 card->tx_cmd_ep = usb_endpoint_num(epd);
429 atomic_set(&card->tx_cmd_urb_pending, 0);
430 card->bulk_out_maxpktsize =
431 le16_to_cpu(epd->wMaxPacketSize);
432 }
433 }
434
435 usb_set_intfdata(intf, card);
436
437 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
438 MWIFIEX_USB);
439 if (ret) {
440 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
441 usb_reset_device(udev);
442 kfree(card);
443 return ret;
444 }
445
446 usb_get_dev(udev);
447
448 return 0;
449 }
450
451 /* Kernel needs to suspend all functions separately. Therefore all
452 * registered functions must have drivers with suspend and resume
453 * methods. Failing that the kernel simply removes the whole card.
454 *
455 * If already not suspended, this function allocates and sends a
456 * 'host sleep activate' request to the firmware and turns off the traffic.
457 */
458 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
459 {
460 struct usb_card_rec *card = usb_get_intfdata(intf);
461 struct mwifiex_adapter *adapter;
462 int i;
463
464 if (!card || !card->adapter) {
465 pr_err("%s: card or card->adapter is NULL\n", __func__);
466 return 0;
467 }
468 adapter = card->adapter;
469
470 if (unlikely(adapter->is_suspended))
471 dev_warn(adapter->dev, "Device already suspended\n");
472
473 mwifiex_enable_hs(adapter);
474
475 /* 'is_suspended' flag indicates device is suspended.
476 * It must be set here before the usb_kill_urb() calls. Reason
477 * is in the complete handlers, urb->status(= -ENOENT) and
478 * this flag is used in combination to distinguish between a
479 * 'suspended' state and a 'disconnect' one.
480 */
481 adapter->is_suspended = true;
482 adapter->hs_enabling = false;
483
484 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
485 usb_kill_urb(card->rx_cmd.urb);
486
487 if (atomic_read(&card->rx_data_urb_pending))
488 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
489 if (card->rx_data_list[i].urb)
490 usb_kill_urb(card->rx_data_list[i].urb);
491
492 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
493 if (card->tx_data_list[i].urb)
494 usb_kill_urb(card->tx_data_list[i].urb);
495
496 if (card->tx_cmd.urb)
497 usb_kill_urb(card->tx_cmd.urb);
498
499 return 0;
500 }
501
502 /* Kernel needs to suspend all functions separately. Therefore all
503 * registered functions must have drivers with suspend and resume
504 * methods. Failing that the kernel simply removes the whole card.
505 *
506 * If already not resumed, this function turns on the traffic and
507 * sends a 'host sleep cancel' request to the firmware.
508 */
509 static int mwifiex_usb_resume(struct usb_interface *intf)
510 {
511 struct usb_card_rec *card = usb_get_intfdata(intf);
512 struct mwifiex_adapter *adapter;
513 int i;
514
515 if (!card || !card->adapter) {
516 pr_err("%s: card or card->adapter is NULL\n", __func__);
517 return 0;
518 }
519 adapter = card->adapter;
520
521 if (unlikely(!adapter->is_suspended)) {
522 dev_warn(adapter->dev, "Device already resumed\n");
523 return 0;
524 }
525
526 /* Indicate device resumed. The netdev queue will be resumed only
527 * after the urbs have been re-submitted
528 */
529 adapter->is_suspended = false;
530
531 if (!atomic_read(&card->rx_data_urb_pending))
532 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
533 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
534 MWIFIEX_RX_DATA_BUF_SIZE);
535
536 if (!atomic_read(&card->rx_cmd_urb_pending)) {
537 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
538 if (card->rx_cmd.skb)
539 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
540 MWIFIEX_RX_CMD_BUF_SIZE);
541 }
542
543 /* Disable Host Sleep */
544 if (adapter->hs_activated)
545 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
546 MWIFIEX_BSS_ROLE_ANY),
547 MWIFIEX_ASYNC_CMD);
548
549 return 0;
550 }
551
552 static void mwifiex_usb_disconnect(struct usb_interface *intf)
553 {
554 struct usb_card_rec *card = usb_get_intfdata(intf);
555 struct mwifiex_adapter *adapter;
556
557 if (!card || !card->adapter) {
558 pr_err("%s: card or card->adapter is NULL\n", __func__);
559 return;
560 }
561
562 adapter = card->adapter;
563 if (!adapter->priv_num)
564 return;
565
566 if (user_rmmod) {
567 #ifdef CONFIG_PM
568 if (adapter->is_suspended)
569 mwifiex_usb_resume(intf);
570 #endif
571
572 mwifiex_deauthenticate_all(adapter);
573
574 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
575 MWIFIEX_BSS_ROLE_ANY),
576 MWIFIEX_FUNC_SHUTDOWN);
577 }
578
579 mwifiex_usb_free(card);
580
581 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
582 mwifiex_remove_card(adapter, &add_remove_card_sem);
583
584 usb_set_intfdata(intf, NULL);
585 usb_put_dev(interface_to_usbdev(intf));
586 kfree(card);
587
588 return;
589 }
590
591 static struct usb_driver mwifiex_usb_driver = {
592 .name = "mwifiex_usb",
593 .probe = mwifiex_usb_probe,
594 .disconnect = mwifiex_usb_disconnect,
595 .id_table = mwifiex_usb_table,
596 .suspend = mwifiex_usb_suspend,
597 .resume = mwifiex_usb_resume,
598 .soft_unbind = 1,
599 };
600
601 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
602 {
603 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
604 int i;
605
606 card->tx_cmd.adapter = adapter;
607 card->tx_cmd.ep = card->tx_cmd_ep;
608
609 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
610 if (!card->tx_cmd.urb) {
611 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
612 return -ENOMEM;
613 }
614
615 card->tx_data_ix = 0;
616
617 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
618 card->tx_data_list[i].adapter = adapter;
619 card->tx_data_list[i].ep = card->tx_data_ep;
620
621 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
622 if (!card->tx_data_list[i].urb) {
623 dev_err(adapter->dev,
624 "tx_data_list[] urb allocation failed\n");
625 return -ENOMEM;
626 }
627 }
628
629 return 0;
630 }
631
632 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
633 {
634 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
635 int i;
636
637 card->rx_cmd.adapter = adapter;
638 card->rx_cmd.ep = card->rx_cmd_ep;
639
640 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
641 if (!card->rx_cmd.urb) {
642 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
643 return -ENOMEM;
644 }
645
646 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
647 if (!card->rx_cmd.skb) {
648 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
649 return -ENOMEM;
650 }
651
652 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
653 return -1;
654
655 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
656 card->rx_data_list[i].adapter = adapter;
657 card->rx_data_list[i].ep = card->rx_data_ep;
658
659 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
660 if (!card->rx_data_list[i].urb) {
661 dev_err(adapter->dev,
662 "rx_data_list[] urb allocation failed\n");
663 return -1;
664 }
665 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
666 MWIFIEX_RX_DATA_BUF_SIZE))
667 return -1;
668 }
669
670 return 0;
671 }
672
673 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
674 u32 *len, u8 ep, u32 timeout)
675 {
676 struct usb_card_rec *card = adapter->card;
677 int actual_length, ret;
678
679 if (!(*len % card->bulk_out_maxpktsize))
680 (*len)++;
681
682 /* Send the data block */
683 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
684 *len, &actual_length, timeout);
685 if (ret) {
686 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
687 return ret;
688 }
689
690 *len = actual_length;
691
692 return ret;
693 }
694
695 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
696 u32 *len, u8 ep, u32 timeout)
697 {
698 struct usb_card_rec *card = adapter->card;
699 int actual_length, ret;
700
701 /* Receive the data response */
702 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
703 *len, &actual_length, timeout);
704 if (ret) {
705 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
706 return ret;
707 }
708
709 *len = actual_length;
710
711 return ret;
712 }
713
714 /* This function write a command/data packet to card. */
715 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
716 struct sk_buff *skb,
717 struct mwifiex_tx_param *tx_param)
718 {
719 struct usb_card_rec *card = adapter->card;
720 struct urb_context *context;
721 u8 *data = (u8 *)skb->data;
722 struct urb *tx_urb;
723
724 if (adapter->is_suspended) {
725 dev_err(adapter->dev,
726 "%s: not allowed while suspended\n", __func__);
727 return -1;
728 }
729
730 if (adapter->surprise_removed) {
731 dev_err(adapter->dev, "%s: device removed\n", __func__);
732 return -1;
733 }
734
735 if (ep == card->tx_data_ep &&
736 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
737 return -EBUSY;
738 }
739
740 dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
741
742 if (ep == card->tx_cmd_ep) {
743 context = &card->tx_cmd;
744 } else {
745 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
746 card->tx_data_ix = 0;
747 context = &card->tx_data_list[card->tx_data_ix++];
748 }
749
750 context->adapter = adapter;
751 context->ep = ep;
752 context->skb = skb;
753 tx_urb = context->urb;
754
755 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
756 data, skb->len, mwifiex_usb_tx_complete,
757 (void *)context);
758
759 tx_urb->transfer_flags |= URB_ZERO_PACKET;
760
761 if (ep == card->tx_cmd_ep)
762 atomic_inc(&card->tx_cmd_urb_pending);
763 else
764 atomic_inc(&card->tx_data_urb_pending);
765
766 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
767 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
768 if (ep == card->tx_cmd_ep) {
769 atomic_dec(&card->tx_cmd_urb_pending);
770 } else {
771 atomic_dec(&card->tx_data_urb_pending);
772 if (card->tx_data_ix)
773 card->tx_data_ix--;
774 else
775 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
776 }
777
778 return -1;
779 } else {
780 if (ep == card->tx_data_ep &&
781 atomic_read(&card->tx_data_urb_pending) ==
782 MWIFIEX_TX_DATA_URB)
783 return -ENOSR;
784 }
785
786 return -EINPROGRESS;
787 }
788
789 /* This function register usb device and initialize parameter. */
790 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
791 {
792 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
793
794 card->adapter = adapter;
795 adapter->dev = &card->udev->dev;
796
797 switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
798 case USB8897_PID_1:
799 case USB8897_PID_2:
800 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
801 strcpy(adapter->fw_name, USB8897_DEFAULT_FW_NAME);
802 adapter->ext_scan = true;
803 break;
804 case USB8766_PID_1:
805 case USB8766_PID_2:
806 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
807 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
808 adapter->ext_scan = true;
809 break;
810 case USB8801_PID_1:
811 case USB8801_PID_2:
812 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
813 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
814 adapter->ext_scan = false;
815 break;
816 case USB8797_PID_1:
817 case USB8797_PID_2:
818 default:
819 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
820 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
821 break;
822 }
823
824 return 0;
825 }
826
827 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
828 {
829 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
830
831 card->adapter = NULL;
832 }
833
834 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
835 struct mwifiex_fw_image *fw)
836 {
837 int ret = 0;
838 u8 *firmware = fw->fw_buf, *recv_buff;
839 u32 retries = USB8XXX_FW_MAX_RETRY, dlen;
840 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
841 struct fw_data *fwdata;
842 struct fw_sync_header sync_fw;
843 u8 check_winner = 1;
844
845 if (!firmware) {
846 dev_err(adapter->dev,
847 "No firmware image found! Terminating download\n");
848 ret = -1;
849 goto fw_exit;
850 }
851
852 /* Allocate memory for transmit */
853 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
854 if (!fwdata)
855 goto fw_exit;
856
857 /* Allocate memory for receive */
858 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
859 if (!recv_buff)
860 goto cleanup;
861
862 do {
863 /* Send pseudo data to check winner status first */
864 if (check_winner) {
865 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
866 dlen = 0;
867 } else {
868 /* copy the header of the fw_data to get the length */
869 memcpy(&fwdata->fw_hdr, &firmware[tlen],
870 sizeof(struct fw_header));
871
872 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
873 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
874 tlen += sizeof(struct fw_header);
875
876 memcpy(fwdata->data, &firmware[tlen], dlen);
877
878 fwdata->seq_num = cpu_to_le32(fw_seqnum);
879 tlen += dlen;
880 }
881
882 /* If the send/receive fails or CRC occurs then retry */
883 while (retries--) {
884 u8 *buf = (u8 *)fwdata;
885 u32 len = FW_DATA_XMIT_SIZE;
886
887 /* send the firmware block */
888 ret = mwifiex_write_data_sync(adapter, buf, &len,
889 MWIFIEX_USB_EP_CMD_EVENT,
890 MWIFIEX_USB_TIMEOUT);
891 if (ret) {
892 dev_err(adapter->dev,
893 "write_data_sync: failed: %d\n", ret);
894 continue;
895 }
896
897 buf = recv_buff;
898 len = FW_DNLD_RX_BUF_SIZE;
899
900 /* Receive the firmware block response */
901 ret = mwifiex_read_data_sync(adapter, buf, &len,
902 MWIFIEX_USB_EP_CMD_EVENT,
903 MWIFIEX_USB_TIMEOUT);
904 if (ret) {
905 dev_err(adapter->dev,
906 "read_data_sync: failed: %d\n", ret);
907 continue;
908 }
909
910 memcpy(&sync_fw, recv_buff,
911 sizeof(struct fw_sync_header));
912
913 /* check 1st firmware block resp for highest bit set */
914 if (check_winner) {
915 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
916 dev_warn(adapter->dev,
917 "USB is not the winner %#x\n",
918 sync_fw.cmd);
919
920 /* returning success */
921 ret = 0;
922 goto cleanup;
923 }
924
925 dev_dbg(adapter->dev,
926 "USB is the winner, start to download FW\n");
927
928 check_winner = 0;
929 break;
930 }
931
932 /* check the firmware block response for CRC errors */
933 if (sync_fw.cmd) {
934 dev_err(adapter->dev,
935 "FW received block with CRC %#x\n",
936 sync_fw.cmd);
937 ret = -1;
938 continue;
939 }
940
941 retries = USB8XXX_FW_MAX_RETRY;
942 break;
943 }
944 fw_seqnum++;
945 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
946
947 cleanup:
948 dev_notice(adapter->dev,
949 "info: FW download over, size %d bytes\n", tlen);
950
951 kfree(recv_buff);
952 kfree(fwdata);
953
954 if (retries)
955 ret = 0;
956 fw_exit:
957 return ret;
958 }
959
960 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
961 struct mwifiex_fw_image *fw)
962 {
963 int ret;
964 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
965
966 if (card->usb_boot_state == USB8XXX_FW_DNLD) {
967 ret = mwifiex_prog_fw_w_helper(adapter, fw);
968 if (ret)
969 return -1;
970
971 /* Boot state changes after successful firmware download */
972 if (card->usb_boot_state == USB8XXX_FW_DNLD)
973 return -1;
974 }
975
976 ret = mwifiex_usb_rx_init(adapter);
977 if (!ret)
978 ret = mwifiex_usb_tx_init(adapter);
979
980 return ret;
981 }
982
983 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
984 {
985 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
986
987 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
988 if ((ep == card->rx_cmd_ep) &&
989 (!atomic_read(&card->rx_cmd_urb_pending)))
990 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
991 MWIFIEX_RX_CMD_BUF_SIZE);
992
993 return;
994 }
995
996 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
997 struct sk_buff *skb)
998 {
999 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1000
1001 return 0;
1002 }
1003
1004 /* This function wakes up the card. */
1005 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1006 {
1007 /* Simulation of HS_AWAKE event */
1008 adapter->pm_wakeup_fw_try = false;
1009 del_timer(&adapter->wakeup_timer);
1010 adapter->pm_wakeup_card_req = false;
1011 adapter->ps_state = PS_STATE_AWAKE;
1012
1013 return 0;
1014 }
1015
1016 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1017 {
1018 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1019 int i;
1020 struct urb_context *ctx;
1021
1022 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1023 if (card->rx_data_list[i].skb)
1024 continue;
1025 ctx = &card->rx_data_list[i];
1026 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1027 }
1028 }
1029
1030 /* This function is called after the card has woken up. */
1031 static inline int
1032 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1033 {
1034 return 0;
1035 }
1036
1037 static struct mwifiex_if_ops usb_ops = {
1038 .register_dev = mwifiex_register_dev,
1039 .unregister_dev = mwifiex_unregister_dev,
1040 .wakeup = mwifiex_pm_wakeup_card,
1041 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1042
1043 /* USB specific */
1044 .dnld_fw = mwifiex_usb_dnld_fw,
1045 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
1046 .event_complete = mwifiex_usb_cmd_event_complete,
1047 .host_to_card = mwifiex_usb_host_to_card,
1048 .submit_rem_rx_urbs = mwifiex_usb_submit_rem_rx_urbs,
1049 };
1050
1051 /* This function initializes the USB driver module.
1052 *
1053 * This initiates the semaphore and registers the device with
1054 * USB bus.
1055 */
1056 static int mwifiex_usb_init_module(void)
1057 {
1058 int ret;
1059
1060 pr_debug("Marvell USB8797 Driver\n");
1061
1062 sema_init(&add_remove_card_sem, 1);
1063
1064 ret = usb_register(&mwifiex_usb_driver);
1065 if (ret)
1066 pr_err("Driver register failed!\n");
1067 else
1068 pr_debug("info: Driver registered successfully!\n");
1069
1070 return ret;
1071 }
1072
1073 /* This function cleans up the USB driver.
1074 *
1075 * The following major steps are followed in .disconnect for cleanup:
1076 * - Resume the device if its suspended
1077 * - Disconnect the device if connected
1078 * - Shutdown the firmware
1079 * - Unregister the device from USB bus.
1080 */
1081 static void mwifiex_usb_cleanup_module(void)
1082 {
1083 if (!down_interruptible(&add_remove_card_sem))
1084 up(&add_remove_card_sem);
1085
1086 /* set the flag as user is removing this module */
1087 user_rmmod = 1;
1088
1089 usb_deregister(&mwifiex_usb_driver);
1090 }
1091
1092 module_init(mwifiex_usb_init_module);
1093 module_exit(mwifiex_usb_cleanup_module);
1094
1095 MODULE_AUTHOR("Marvell International Ltd.");
1096 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1097 MODULE_VERSION(USB_VERSION);
1098 MODULE_LICENSE("GPL v2");
1099 MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
1100 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1101 MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
1102 MODULE_FIRMWARE(USB8897_DEFAULT_FW_NAME);
Linux kernel - Deliverables
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