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