projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mwifiex: add usb multi channel event process support
[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 /* 8997 */
51 {USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
52 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_PID_2,
53 USB_CLASS_VENDOR_SPEC,
54 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
55 { } /* Terminating entry */
56 };
57
58 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
59
60 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
61
62 /* This function handles received packet. Necessary action is taken based on
63 * cmd/event/data.
64 */
65 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
66 struct sk_buff *skb, u8 ep)
67 {
68 u32 recv_type;
69 __le32 tmp;
70 int ret;
71
72 if (adapter->hs_activated)
73 mwifiex_process_hs_config(adapter);
74
75 if (skb->len < INTF_HEADER_LEN) {
76 mwifiex_dbg(adapter, ERROR,
77 "%s: invalid skb->len\n", __func__);
78 return -1;
79 }
80
81 switch (ep) {
82 case MWIFIEX_USB_EP_CMD_EVENT:
83 mwifiex_dbg(adapter, EVENT,
84 "%s: EP_CMD_EVENT\n", __func__);
85 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
86 recv_type = le32_to_cpu(tmp);
87 skb_pull(skb, INTF_HEADER_LEN);
88
89 switch (recv_type) {
90 case MWIFIEX_USB_TYPE_CMD:
91 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
92 mwifiex_dbg(adapter, ERROR,
93 "CMD: skb->len too large\n");
94 ret = -1;
95 goto exit_restore_skb;
96 } else if (!adapter->curr_cmd) {
97 mwifiex_dbg(adapter, WARN, "CMD: no curr_cmd\n");
98 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
99 mwifiex_process_sleep_confirm_resp(
100 adapter, skb->data,
101 skb->len);
102 ret = 0;
103 goto exit_restore_skb;
104 }
105 ret = -1;
106 goto exit_restore_skb;
107 }
108
109 adapter->curr_cmd->resp_skb = skb;
110 adapter->cmd_resp_received = true;
111 break;
112 case MWIFIEX_USB_TYPE_EVENT:
113 if (skb->len < sizeof(u32)) {
114 mwifiex_dbg(adapter, ERROR,
115 "EVENT: skb->len too small\n");
116 ret = -1;
117 goto exit_restore_skb;
118 }
119 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
120 adapter->event_cause = le32_to_cpu(tmp);
121 mwifiex_dbg(adapter, EVENT,
122 "event_cause %#x\n", adapter->event_cause);
123
124 if (skb->len > MAX_EVENT_SIZE) {
125 mwifiex_dbg(adapter, ERROR,
126 "EVENT: event body too large\n");
127 ret = -1;
128 goto exit_restore_skb;
129 }
130
131 memcpy(adapter->event_body, skb->data +
132 MWIFIEX_EVENT_HEADER_LEN, skb->len);
133
134 adapter->event_received = true;
135 adapter->event_skb = skb;
136 break;
137 default:
138 mwifiex_dbg(adapter, ERROR,
139 "unknown recv_type %#x\n", recv_type);
140 return -1;
141 }
142 break;
143 case MWIFIEX_USB_EP_DATA:
144 mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
145 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
146 mwifiex_dbg(adapter, ERROR,
147 "DATA: skb->len too large\n");
148 return -1;
149 }
150
151 skb_queue_tail(&adapter->rx_data_q, skb);
152 adapter->data_received = true;
153 atomic_inc(&adapter->rx_pending);
154 break;
155 default:
156 mwifiex_dbg(adapter, ERROR,
157 "%s: unknown endport %#x\n", __func__, ep);
158 return -1;
159 }
160
161 return -EINPROGRESS;
162
163 exit_restore_skb:
164 /* The buffer will be reused for further cmds/events */
165 skb_push(skb, INTF_HEADER_LEN);
166
167 return ret;
168 }
169
170 static void mwifiex_usb_rx_complete(struct urb *urb)
171 {
172 struct urb_context *context = (struct urb_context *)urb->context;
173 struct mwifiex_adapter *adapter = context->adapter;
174 struct sk_buff *skb = context->skb;
175 struct usb_card_rec *card;
176 int recv_length = urb->actual_length;
177 int size, status;
178
179 if (!adapter || !adapter->card) {
180 pr_err("mwifiex adapter or card structure is not valid\n");
181 return;
182 }
183
184 card = (struct usb_card_rec *)adapter->card;
185 if (card->rx_cmd_ep == context->ep)
186 atomic_dec(&card->rx_cmd_urb_pending);
187 else
188 atomic_dec(&card->rx_data_urb_pending);
189
190 if (recv_length) {
191 if (urb->status || (adapter->surprise_removed)) {
192 mwifiex_dbg(adapter, ERROR,
193 "URB status is failed: %d\n", urb->status);
194 /* Do not free skb in case of command ep */
195 if (card->rx_cmd_ep != context->ep)
196 dev_kfree_skb_any(skb);
197 goto setup_for_next;
198 }
199 if (skb->len > recv_length)
200 skb_trim(skb, recv_length);
201 else
202 skb_put(skb, recv_length - skb->len);
203
204 status = mwifiex_usb_recv(adapter, skb, context->ep);
205
206 mwifiex_dbg(adapter, INFO,
207 "info: recv_length=%d, status=%d\n",
208 recv_length, status);
209 if (status == -EINPROGRESS) {
210 mwifiex_queue_main_work(adapter);
211
212 /* urb for data_ep is re-submitted now;
213 * urb for cmd_ep will be re-submitted in callback
214 * mwifiex_usb_recv_complete
215 */
216 if (card->rx_cmd_ep == context->ep)
217 return;
218 } else {
219 if (status == -1)
220 mwifiex_dbg(adapter, ERROR,
221 "received data processing failed!\n");
222
223 /* Do not free skb in case of command ep */
224 if (card->rx_cmd_ep != context->ep)
225 dev_kfree_skb_any(skb);
226 }
227 } else if (urb->status) {
228 if (!adapter->is_suspended) {
229 mwifiex_dbg(adapter, FATAL,
230 "Card is removed: %d\n", urb->status);
231 adapter->surprise_removed = true;
232 }
233 dev_kfree_skb_any(skb);
234 return;
235 } else {
236 /* Do not free skb in case of command ep */
237 if (card->rx_cmd_ep != context->ep)
238 dev_kfree_skb_any(skb);
239
240 /* fall through setup_for_next */
241 }
242
243 setup_for_next:
244 if (card->rx_cmd_ep == context->ep)
245 size = MWIFIEX_RX_CMD_BUF_SIZE;
246 else
247 size = MWIFIEX_RX_DATA_BUF_SIZE;
248
249 if (card->rx_cmd_ep == context->ep) {
250 mwifiex_usb_submit_rx_urb(context, size);
251 } else {
252 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING){
253 mwifiex_usb_submit_rx_urb(context, size);
254 }else{
255 context->skb = NULL;
256 }
257 }
258
259 return;
260 }
261
262 static void mwifiex_usb_tx_complete(struct urb *urb)
263 {
264 struct urb_context *context = (struct urb_context *)(urb->context);
265 struct mwifiex_adapter *adapter = context->adapter;
266 struct usb_card_rec *card = adapter->card;
267
268 mwifiex_dbg(adapter, INFO,
269 "%s: status: %d\n", __func__, urb->status);
270
271 if (context->ep == card->tx_cmd_ep) {
272 mwifiex_dbg(adapter, CMD,
273 "%s: CMD\n", __func__);
274 atomic_dec(&card->tx_cmd_urb_pending);
275 adapter->cmd_sent = false;
276 } else {
277 mwifiex_dbg(adapter, DATA,
278 "%s: DATA\n", __func__);
279 atomic_dec(&card->tx_data_urb_pending);
280 adapter->data_sent = false;
281 mwifiex_write_data_complete(adapter, context->skb, 0,
282 urb->status ? -1 : 0);
283 }
284
285 mwifiex_queue_main_work(adapter);
286
287 return;
288 }
289
290 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
291 {
292 struct mwifiex_adapter *adapter = ctx->adapter;
293 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
294
295 if (card->rx_cmd_ep != ctx->ep) {
296 ctx->skb = dev_alloc_skb(size);
297 if (!ctx->skb) {
298 mwifiex_dbg(adapter, ERROR,
299 "%s: dev_alloc_skb failed\n", __func__);
300 return -ENOMEM;
301 }
302 }
303
304 usb_fill_bulk_urb(ctx->urb, card->udev,
305 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
306 size, mwifiex_usb_rx_complete, (void *)ctx);
307
308 if (card->rx_cmd_ep == ctx->ep)
309 atomic_inc(&card->rx_cmd_urb_pending);
310 else
311 atomic_inc(&card->rx_data_urb_pending);
312
313 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
314 mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
315 dev_kfree_skb_any(ctx->skb);
316 ctx->skb = NULL;
317
318 if (card->rx_cmd_ep == ctx->ep)
319 atomic_dec(&card->rx_cmd_urb_pending);
320 else
321 atomic_dec(&card->rx_data_urb_pending);
322
323 return -1;
324 }
325
326 return 0;
327 }
328
329 static void mwifiex_usb_free(struct usb_card_rec *card)
330 {
331 int i;
332
333 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
334 usb_kill_urb(card->rx_cmd.urb);
335
336 usb_free_urb(card->rx_cmd.urb);
337 card->rx_cmd.urb = NULL;
338
339 if (atomic_read(&card->rx_data_urb_pending))
340 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
341 if (card->rx_data_list[i].urb)
342 usb_kill_urb(card->rx_data_list[i].urb);
343
344 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
345 usb_free_urb(card->rx_data_list[i].urb);
346 card->rx_data_list[i].urb = NULL;
347 }
348
349 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
350 usb_free_urb(card->tx_data_list[i].urb);
351 card->tx_data_list[i].urb = NULL;
352 }
353
354 usb_free_urb(card->tx_cmd.urb);
355 card->tx_cmd.urb = NULL;
356
357 return;
358 }
359
360 /* This function probes an mwifiex device and registers it. It allocates
361 * the card structure, initiates the device registration and initialization
362 * procedure by adding a logical interface.
363 */
364 static int mwifiex_usb_probe(struct usb_interface *intf,
365 const struct usb_device_id *id)
366 {
367 struct usb_device *udev = interface_to_usbdev(intf);
368 struct usb_host_interface *iface_desc = intf->cur_altsetting;
369 struct usb_endpoint_descriptor *epd;
370 int ret, i;
371 struct usb_card_rec *card;
372 u16 id_vendor, id_product, bcd_device, bcd_usb;
373
374 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
375 if (!card)
376 return -ENOMEM;
377
378 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
379 id_product = le16_to_cpu(udev->descriptor.idProduct);
380 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
381 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
382 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
383 id_vendor, id_product, bcd_device);
384
385 /* PID_1 is used for firmware downloading only */
386 switch (id_product) {
387 case USB8766_PID_1:
388 case USB8797_PID_1:
389 case USB8801_PID_1:
390 case USB8897_PID_1:
391 case USB8997_PID_1:
392 card->usb_boot_state = USB8XXX_FW_DNLD;
393 break;
394 case USB8766_PID_2:
395 case USB8797_PID_2:
396 case USB8801_PID_2:
397 case USB8897_PID_2:
398 case USB8997_PID_2:
399 card->usb_boot_state = USB8XXX_FW_READY;
400 break;
401 default:
402 pr_warn("unknown id_product %#x\n", id_product);
403 card->usb_boot_state = USB8XXX_FW_DNLD;
404 break;
405 }
406
407 card->udev = udev;
408 card->intf = intf;
409
410 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
411 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
412 udev->descriptor.bDeviceSubClass,
413 udev->descriptor.bDeviceProtocol);
414
415 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
416 epd = &iface_desc->endpoint[i].desc;
417 if (usb_endpoint_dir_in(epd) &&
418 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
419 usb_endpoint_xfer_bulk(epd)) {
420 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
421 le16_to_cpu(epd->wMaxPacketSize),
422 epd->bEndpointAddress);
423 card->rx_cmd_ep = usb_endpoint_num(epd);
424 atomic_set(&card->rx_cmd_urb_pending, 0);
425 }
426 if (usb_endpoint_dir_in(epd) &&
427 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
428 usb_endpoint_xfer_bulk(epd)) {
429 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
430 le16_to_cpu(epd->wMaxPacketSize),
431 epd->bEndpointAddress);
432 card->rx_data_ep = usb_endpoint_num(epd);
433 atomic_set(&card->rx_data_urb_pending, 0);
434 }
435 if (usb_endpoint_dir_out(epd) &&
436 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
437 usb_endpoint_xfer_bulk(epd)) {
438 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
439 le16_to_cpu(epd->wMaxPacketSize),
440 epd->bEndpointAddress);
441 card->tx_data_ep = usb_endpoint_num(epd);
442 atomic_set(&card->tx_data_urb_pending, 0);
443 }
444 if (usb_endpoint_dir_out(epd) &&
445 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
446 usb_endpoint_xfer_bulk(epd)) {
447 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
448 le16_to_cpu(epd->wMaxPacketSize),
449 epd->bEndpointAddress);
450 card->tx_cmd_ep = usb_endpoint_num(epd);
451 atomic_set(&card->tx_cmd_urb_pending, 0);
452 card->bulk_out_maxpktsize =
453 le16_to_cpu(epd->wMaxPacketSize);
454 }
455 }
456
457 usb_set_intfdata(intf, card);
458
459 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
460 MWIFIEX_USB);
461 if (ret) {
462 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
463 usb_reset_device(udev);
464 kfree(card);
465 return ret;
466 }
467
468 usb_get_dev(udev);
469
470 return 0;
471 }
472
473 /* Kernel needs to suspend all functions separately. Therefore all
474 * registered functions must have drivers with suspend and resume
475 * methods. Failing that the kernel simply removes the whole card.
476 *
477 * If already not suspended, this function allocates and sends a
478 * 'host sleep activate' request to the firmware and turns off the traffic.
479 */
480 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
481 {
482 struct usb_card_rec *card = usb_get_intfdata(intf);
483 struct mwifiex_adapter *adapter;
484 int i;
485
486 if (!card || !card->adapter) {
487 pr_err("%s: card or card->adapter is NULL\n", __func__);
488 return 0;
489 }
490 adapter = card->adapter;
491
492 if (unlikely(adapter->is_suspended))
493 mwifiex_dbg(adapter, WARN,
494 "Device already suspended\n");
495
496 mwifiex_enable_hs(adapter);
497
498 /* 'is_suspended' flag indicates device is suspended.
499 * It must be set here before the usb_kill_urb() calls. Reason
500 * is in the complete handlers, urb->status(= -ENOENT) and
501 * this flag is used in combination to distinguish between a
502 * 'suspended' state and a 'disconnect' one.
503 */
504 adapter->is_suspended = true;
505 adapter->hs_enabling = false;
506
507 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
508 usb_kill_urb(card->rx_cmd.urb);
509
510 if (atomic_read(&card->rx_data_urb_pending))
511 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
512 if (card->rx_data_list[i].urb)
513 usb_kill_urb(card->rx_data_list[i].urb);
514
515 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
516 if (card->tx_data_list[i].urb)
517 usb_kill_urb(card->tx_data_list[i].urb);
518
519 if (card->tx_cmd.urb)
520 usb_kill_urb(card->tx_cmd.urb);
521
522 return 0;
523 }
524
525 /* Kernel needs to suspend all functions separately. Therefore all
526 * registered functions must have drivers with suspend and resume
527 * methods. Failing that the kernel simply removes the whole card.
528 *
529 * If already not resumed, this function turns on the traffic and
530 * sends a 'host sleep cancel' request to the firmware.
531 */
532 static int mwifiex_usb_resume(struct usb_interface *intf)
533 {
534 struct usb_card_rec *card = usb_get_intfdata(intf);
535 struct mwifiex_adapter *adapter;
536 int i;
537
538 if (!card || !card->adapter) {
539 pr_err("%s: card or card->adapter is NULL\n", __func__);
540 return 0;
541 }
542 adapter = card->adapter;
543
544 if (unlikely(!adapter->is_suspended)) {
545 mwifiex_dbg(adapter, WARN,
546 "Device already resumed\n");
547 return 0;
548 }
549
550 /* Indicate device resumed. The netdev queue will be resumed only
551 * after the urbs have been re-submitted
552 */
553 adapter->is_suspended = false;
554
555 if (!atomic_read(&card->rx_data_urb_pending))
556 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
557 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
558 MWIFIEX_RX_DATA_BUF_SIZE);
559
560 if (!atomic_read(&card->rx_cmd_urb_pending)) {
561 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
562 if (card->rx_cmd.skb)
563 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
564 MWIFIEX_RX_CMD_BUF_SIZE);
565 }
566
567 /* Disable Host Sleep */
568 if (adapter->hs_activated)
569 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
570 MWIFIEX_BSS_ROLE_ANY),
571 MWIFIEX_ASYNC_CMD);
572
573 return 0;
574 }
575
576 static void mwifiex_usb_disconnect(struct usb_interface *intf)
577 {
578 struct usb_card_rec *card = usb_get_intfdata(intf);
579 struct mwifiex_adapter *adapter;
580
581 if (!card || !card->adapter) {
582 pr_err("%s: card or card->adapter is NULL\n", __func__);
583 return;
584 }
585
586 adapter = card->adapter;
587 if (!adapter->priv_num)
588 return;
589
590 if (user_rmmod) {
591 #ifdef CONFIG_PM
592 if (adapter->is_suspended)
593 mwifiex_usb_resume(intf);
594 #endif
595
596 mwifiex_deauthenticate_all(adapter);
597
598 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
599 MWIFIEX_BSS_ROLE_ANY),
600 MWIFIEX_FUNC_SHUTDOWN);
601 }
602
603 mwifiex_usb_free(card);
604
605 mwifiex_dbg(adapter, FATAL,
606 "%s: removing card\n", __func__);
607 mwifiex_remove_card(adapter, &add_remove_card_sem);
608
609 usb_set_intfdata(intf, NULL);
610 usb_put_dev(interface_to_usbdev(intf));
611 kfree(card);
612
613 return;
614 }
615
616 static struct usb_driver mwifiex_usb_driver = {
617 .name = "mwifiex_usb",
618 .probe = mwifiex_usb_probe,
619 .disconnect = mwifiex_usb_disconnect,
620 .id_table = mwifiex_usb_table,
621 .suspend = mwifiex_usb_suspend,
622 .resume = mwifiex_usb_resume,
623 .soft_unbind = 1,
624 };
625
626 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
627 {
628 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
629 int i;
630
631 card->tx_cmd.adapter = adapter;
632 card->tx_cmd.ep = card->tx_cmd_ep;
633
634 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
635 if (!card->tx_cmd.urb) {
636 mwifiex_dbg(adapter, ERROR,
637 "tx_cmd.urb allocation failed\n");
638 return -ENOMEM;
639 }
640
641 card->tx_data_ix = 0;
642
643 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
644 card->tx_data_list[i].adapter = adapter;
645 card->tx_data_list[i].ep = card->tx_data_ep;
646
647 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
648 if (!card->tx_data_list[i].urb) {
649 mwifiex_dbg(adapter, ERROR,
650 "tx_data_list[] urb allocation failed\n");
651 return -ENOMEM;
652 }
653 }
654
655 return 0;
656 }
657
658 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
659 {
660 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
661 int i;
662
663 card->rx_cmd.adapter = adapter;
664 card->rx_cmd.ep = card->rx_cmd_ep;
665
666 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
667 if (!card->rx_cmd.urb) {
668 mwifiex_dbg(adapter, ERROR, "rx_cmd.urb allocation failed\n");
669 return -ENOMEM;
670 }
671
672 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
673 if (!card->rx_cmd.skb)
674 return -ENOMEM;
675
676 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
677 return -1;
678
679 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
680 card->rx_data_list[i].adapter = adapter;
681 card->rx_data_list[i].ep = card->rx_data_ep;
682
683 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
684 if (!card->rx_data_list[i].urb) {
685 mwifiex_dbg(adapter, ERROR,
686 "rx_data_list[] urb allocation failed\n");
687 return -1;
688 }
689 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
690 MWIFIEX_RX_DATA_BUF_SIZE))
691 return -1;
692 }
693
694 return 0;
695 }
696
697 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
698 u32 *len, u8 ep, u32 timeout)
699 {
700 struct usb_card_rec *card = adapter->card;
701 int actual_length, ret;
702
703 if (!(*len % card->bulk_out_maxpktsize))
704 (*len)++;
705
706 /* Send the data block */
707 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
708 *len, &actual_length, timeout);
709 if (ret) {
710 mwifiex_dbg(adapter, ERROR,
711 "usb_bulk_msg for tx failed: %d\n", ret);
712 return ret;
713 }
714
715 *len = actual_length;
716
717 return ret;
718 }
719
720 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
721 u32 *len, u8 ep, u32 timeout)
722 {
723 struct usb_card_rec *card = adapter->card;
724 int actual_length, ret;
725
726 /* Receive the data response */
727 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
728 *len, &actual_length, timeout);
729 if (ret) {
730 mwifiex_dbg(adapter, ERROR,
731 "usb_bulk_msg for rx failed: %d\n", ret);
732 return ret;
733 }
734
735 *len = actual_length;
736
737 return ret;
738 }
739
740 /* This function write a command/data packet to card. */
741 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
742 struct sk_buff *skb,
743 struct mwifiex_tx_param *tx_param)
744 {
745 struct usb_card_rec *card = adapter->card;
746 struct urb_context *context;
747 u8 *data = (u8 *)skb->data;
748 struct urb *tx_urb;
749
750 if (adapter->is_suspended) {
751 mwifiex_dbg(adapter, ERROR,
752 "%s: not allowed while suspended\n", __func__);
753 return -1;
754 }
755
756 if (adapter->surprise_removed) {
757 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
758 return -1;
759 }
760
761 if (ep == card->tx_data_ep &&
762 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
763 adapter->data_sent = true;
764 return -EBUSY;
765 }
766
767 mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
768
769 if (ep == card->tx_cmd_ep) {
770 context = &card->tx_cmd;
771 } else {
772 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
773 card->tx_data_ix = 0;
774 context = &card->tx_data_list[card->tx_data_ix++];
775 }
776
777 context->adapter = adapter;
778 context->ep = ep;
779 context->skb = skb;
780 tx_urb = context->urb;
781
782 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
783 data, skb->len, mwifiex_usb_tx_complete,
784 (void *)context);
785
786 tx_urb->transfer_flags |= URB_ZERO_PACKET;
787
788 if (ep == card->tx_cmd_ep)
789 atomic_inc(&card->tx_cmd_urb_pending);
790 else
791 atomic_inc(&card->tx_data_urb_pending);
792
793 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
794 mwifiex_dbg(adapter, ERROR,
795 "%s: usb_submit_urb failed\n", __func__);
796 if (ep == card->tx_cmd_ep) {
797 atomic_dec(&card->tx_cmd_urb_pending);
798 } else {
799 atomic_dec(&card->tx_data_urb_pending);
800 adapter->data_sent = false;
801 if (card->tx_data_ix)
802 card->tx_data_ix--;
803 else
804 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
805 }
806
807 return -1;
808 } else {
809 if (ep == card->tx_data_ep &&
810 atomic_read(&card->tx_data_urb_pending) ==
811 MWIFIEX_TX_DATA_URB) {
812 adapter->data_sent = true;
813 return -ENOSR;
814 }
815 }
816
817 return -EINPROGRESS;
818 }
819
820 /* This function register usb device and initialize parameter. */
821 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
822 {
823 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
824
825 card->adapter = adapter;
826 adapter->dev = &card->udev->dev;
827
828 switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
829 case USB8997_PID_1:
830 case USB8997_PID_2:
831 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
832 strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
833 adapter->ext_scan = true;
834 break;
835 case USB8897_PID_1:
836 case USB8897_PID_2:
837 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
838 strcpy(adapter->fw_name, USB8897_DEFAULT_FW_NAME);
839 adapter->ext_scan = true;
840 break;
841 case USB8766_PID_1:
842 case USB8766_PID_2:
843 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
844 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
845 adapter->ext_scan = true;
846 break;
847 case USB8801_PID_1:
848 case USB8801_PID_2:
849 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
850 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
851 adapter->ext_scan = false;
852 break;
853 case USB8797_PID_1:
854 case USB8797_PID_2:
855 default:
856 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
857 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
858 break;
859 }
860
861 adapter->usb_mc_status = false;
862
863 return 0;
864 }
865
866 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
867 {
868 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
869
870 card->adapter = NULL;
871 }
872
873 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
874 struct mwifiex_fw_image *fw)
875 {
876 int ret = 0;
877 u8 *firmware = fw->fw_buf, *recv_buff;
878 u32 retries = USB8XXX_FW_MAX_RETRY, dlen;
879 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
880 struct fw_data *fwdata;
881 struct fw_sync_header sync_fw;
882 u8 check_winner = 1;
883
884 if (!firmware) {
885 mwifiex_dbg(adapter, ERROR,
886 "No firmware image found! Terminating download\n");
887 ret = -1;
888 goto fw_exit;
889 }
890
891 /* Allocate memory for transmit */
892 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
893 if (!fwdata) {
894 ret = -ENOMEM;
895 goto fw_exit;
896 }
897
898 /* Allocate memory for receive */
899 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
900 if (!recv_buff)
901 goto cleanup;
902
903 do {
904 /* Send pseudo data to check winner status first */
905 if (check_winner) {
906 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
907 dlen = 0;
908 } else {
909 /* copy the header of the fw_data to get the length */
910 memcpy(&fwdata->fw_hdr, &firmware[tlen],
911 sizeof(struct fw_header));
912
913 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
914 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
915 tlen += sizeof(struct fw_header);
916
917 memcpy(fwdata->data, &firmware[tlen], dlen);
918
919 fwdata->seq_num = cpu_to_le32(fw_seqnum);
920 tlen += dlen;
921 }
922
923 /* If the send/receive fails or CRC occurs then retry */
924 while (retries--) {
925 u8 *buf = (u8 *)fwdata;
926 u32 len = FW_DATA_XMIT_SIZE;
927
928 /* send the firmware block */
929 ret = mwifiex_write_data_sync(adapter, buf, &len,
930 MWIFIEX_USB_EP_CMD_EVENT,
931 MWIFIEX_USB_TIMEOUT);
932 if (ret) {
933 mwifiex_dbg(adapter, ERROR,
934 "write_data_sync: failed: %d\n",
935 ret);
936 continue;
937 }
938
939 buf = recv_buff;
940 len = FW_DNLD_RX_BUF_SIZE;
941
942 /* Receive the firmware block response */
943 ret = mwifiex_read_data_sync(adapter, buf, &len,
944 MWIFIEX_USB_EP_CMD_EVENT,
945 MWIFIEX_USB_TIMEOUT);
946 if (ret) {
947 mwifiex_dbg(adapter, ERROR,
948 "read_data_sync: failed: %d\n",
949 ret);
950 continue;
951 }
952
953 memcpy(&sync_fw, recv_buff,
954 sizeof(struct fw_sync_header));
955
956 /* check 1st firmware block resp for highest bit set */
957 if (check_winner) {
958 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
959 mwifiex_dbg(adapter, WARN,
960 "USB is not the winner %#x\n",
961 sync_fw.cmd);
962
963 /* returning success */
964 ret = 0;
965 goto cleanup;
966 }
967
968 mwifiex_dbg(adapter, MSG,
969 "start to download FW...\n");
970
971 check_winner = 0;
972 break;
973 }
974
975 /* check the firmware block response for CRC errors */
976 if (sync_fw.cmd) {
977 mwifiex_dbg(adapter, ERROR,
978 "FW received block with CRC %#x\n",
979 sync_fw.cmd);
980 ret = -1;
981 continue;
982 }
983
984 retries = USB8XXX_FW_MAX_RETRY;
985 break;
986 }
987 fw_seqnum++;
988 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
989
990 cleanup:
991 mwifiex_dbg(adapter, MSG,
992 "info: FW download over, size %d bytes\n", tlen);
993
994 kfree(recv_buff);
995 kfree(fwdata);
996
997 if (retries)
998 ret = 0;
999 fw_exit:
1000 return ret;
1001 }
1002
1003 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1004 struct mwifiex_fw_image *fw)
1005 {
1006 int ret;
1007 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1008
1009 if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1010 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1011 if (ret)
1012 return -1;
1013
1014 /* Boot state changes after successful firmware download */
1015 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1016 return -1;
1017 }
1018
1019 ret = mwifiex_usb_rx_init(adapter);
1020 if (!ret)
1021 ret = mwifiex_usb_tx_init(adapter);
1022
1023 return ret;
1024 }
1025
1026 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1027 {
1028 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1029
1030 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1031 if ((ep == card->rx_cmd_ep) &&
1032 (!atomic_read(&card->rx_cmd_urb_pending)))
1033 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1034 MWIFIEX_RX_CMD_BUF_SIZE);
1035
1036 return;
1037 }
1038
1039 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1040 struct sk_buff *skb)
1041 {
1042 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1043
1044 return 0;
1045 }
1046
1047 /* This function wakes up the card. */
1048 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1049 {
1050 /* Simulation of HS_AWAKE event */
1051 adapter->pm_wakeup_fw_try = false;
1052 del_timer(&adapter->wakeup_timer);
1053 adapter->pm_wakeup_card_req = false;
1054 adapter->ps_state = PS_STATE_AWAKE;
1055
1056 return 0;
1057 }
1058
1059 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1060 {
1061 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1062 int i;
1063 struct urb_context *ctx;
1064
1065 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1066 if (card->rx_data_list[i].skb)
1067 continue;
1068 ctx = &card->rx_data_list[i];
1069 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1070 }
1071 }
1072
1073 /* This function is called after the card has woken up. */
1074 static inline int
1075 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1076 {
1077 return 0;
1078 }
1079
1080 static struct mwifiex_if_ops usb_ops = {
1081 .register_dev = mwifiex_register_dev,
1082 .unregister_dev = mwifiex_unregister_dev,
1083 .wakeup = mwifiex_pm_wakeup_card,
1084 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1085
1086 /* USB specific */
1087 .dnld_fw = mwifiex_usb_dnld_fw,
1088 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
1089 .event_complete = mwifiex_usb_cmd_event_complete,
1090 .host_to_card = mwifiex_usb_host_to_card,
1091 .submit_rem_rx_urbs = mwifiex_usb_submit_rem_rx_urbs,
1092 };
1093
1094 /* This function initializes the USB driver module.
1095 *
1096 * This initiates the semaphore and registers the device with
1097 * USB bus.
1098 */
1099 static int mwifiex_usb_init_module(void)
1100 {
1101 int ret;
1102
1103 pr_debug("Marvell USB8797 Driver\n");
1104
1105 sema_init(&add_remove_card_sem, 1);
1106
1107 ret = usb_register(&mwifiex_usb_driver);
1108 if (ret)
1109 pr_err("Driver register failed!\n");
1110 else
1111 pr_debug("info: Driver registered successfully!\n");
1112
1113 return ret;
1114 }
1115
1116 /* This function cleans up the USB driver.
1117 *
1118 * The following major steps are followed in .disconnect for cleanup:
1119 * - Resume the device if its suspended
1120 * - Disconnect the device if connected
1121 * - Shutdown the firmware
1122 * - Unregister the device from USB bus.
1123 */
1124 static void mwifiex_usb_cleanup_module(void)
1125 {
1126 if (!down_interruptible(&add_remove_card_sem))
1127 up(&add_remove_card_sem);
1128
1129 /* set the flag as user is removing this module */
1130 user_rmmod = 1;
1131
1132 usb_deregister(&mwifiex_usb_driver);
1133 }
1134
1135 module_init(mwifiex_usb_init_module);
1136 module_exit(mwifiex_usb_cleanup_module);
1137
1138 MODULE_AUTHOR("Marvell International Ltd.");
1139 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1140 MODULE_VERSION(USB_VERSION);
1141 MODULE_LICENSE("GPL v2");
1142 MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
1143 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1144 MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
1145 MODULE_FIRMWARE(USB8897_DEFAULT_FW_NAME);
1146 MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);
Linux kernel - Deliverables
This page took 0.093002 seconds and 5 git commands to generate.