projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
rtlwifi: Remove redundant if clause
[deliverable/linux.git] / drivers / net / wireless / mwifiex / usb.c
CommitLineData
4daffe35
AK		 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
68458ded 25static const char usbdriver_name[] = "usb8xxx";
4daffe35 26
4daffe35
AK		 27static struct mwifiex_if_ops usb_ops;
28static struct semaphore add_remove_card_sem;
027d3307 29static struct usb_card_rec *usb_card;
4daffe35
AK		 30
31static struct usb_device_id mwifiex_usb_table[] = {
68458ded
YAP		 32 /* 8797 */
33 {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
34 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
35 USB_CLASS_VENDOR_SPEC,
36 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
37 /* 8897 */
38 {USB_DEVICE(USB8XXX_VID, USB8897_PID_1)},
39 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8897_PID_2,
4daffe35
AK		 40 USB_CLASS_VENDOR_SPEC,
41 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
42 { } /* Terminating entry */
43};
44
45MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
46
47static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
48
49/* This function handles received packet. Necessary action is taken based on
50 * cmd/event/data.
51 */
52static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
53 struct sk_buff *skb, u8 ep)
54{
55 struct device *dev = adapter->dev;
56 u32 recv_type;
57 __le32 tmp;
8311f0da 58 int ret;
4daffe35
AK		 59
60 if (adapter->hs_activated)
61 mwifiex_process_hs_config(adapter);
62
63 if (skb->len < INTF_HEADER_LEN) {
64 dev_err(dev, "%s: invalid skb->len\n", __func__);
65 return -1;
66 }
67
68 switch (ep) {
69 case MWIFIEX_USB_EP_CMD_EVENT:
70 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
71 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
72 recv_type = le32_to_cpu(tmp);
73 skb_pull(skb, INTF_HEADER_LEN);
74
75 switch (recv_type) {
76 case MWIFIEX_USB_TYPE_CMD:
77 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
78 dev_err(dev, "CMD: skb->len too large\n");
8311f0da
AK		 79 ret = -1;
80 goto exit_restore_skb;
4daffe35
AK		 81 } else if (!adapter->curr_cmd) {
82 dev_dbg(dev, "CMD: no curr_cmd\n");
83 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
84 mwifiex_process_sleep_confirm_resp(
85 adapter, skb->data,
86 skb->len);
8311f0da
AK		 87 ret = 0;
88 goto exit_restore_skb;
4daffe35 89 }
8311f0da
AK		 90 ret = -1;
91 goto exit_restore_skb;
4daffe35
AK		 92 }
93
94 adapter->curr_cmd->resp_skb = skb;
95 adapter->cmd_resp_received = true;
96 break;
97 case MWIFIEX_USB_TYPE_EVENT:
98 if (skb->len < sizeof(u32)) {
99 dev_err(dev, "EVENT: skb->len too small\n");
8311f0da
AK		 100 ret = -1;
101 goto exit_restore_skb;
4daffe35
AK		 102 }
103 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
104 adapter->event_cause = le32_to_cpu(tmp);
4daffe35
AK		 105 dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
106
107 if (skb->len > MAX_EVENT_SIZE) {
108 dev_err(dev, "EVENT: event body too large\n");
8311f0da
AK		 109 ret = -1;
110 goto exit_restore_skb;
4daffe35
AK		 111 }
112
e80c81dc
AK		 113 memcpy(adapter->event_body, skb->data +
114 MWIFIEX_EVENT_HEADER_LEN, skb->len);
115
4daffe35
AK		 116 adapter->event_received = true;
117 adapter->event_skb = skb;
118 break;
119 default:
120 dev_err(dev, "unknown recv_type %#x\n", recv_type);
121 return -1;
122 }
123 break;
124 case MWIFIEX_USB_EP_DATA:
125 dev_dbg(dev, "%s: EP_DATA\n", __func__);
126 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
127 dev_err(dev, "DATA: skb->len too large\n");
128 return -1;
129 }
130 skb_queue_tail(&adapter->usb_rx_data_q, skb);
131 adapter->data_received = true;
132 break;
133 default:
134 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
135 return -1;
136 }
137
138 return -EINPROGRESS;
8311f0da
AK		 139
140exit_restore_skb:
141 /* The buffer will be reused for further cmds/events */
142 skb_push(skb, INTF_HEADER_LEN);
143
144 return ret;
4daffe35
AK		 145}
146
147static void mwifiex_usb_rx_complete(struct urb *urb)
148{
149 struct urb_context *context = (struct urb_context *)urb->context;
150 struct mwifiex_adapter *adapter = context->adapter;
151 struct sk_buff *skb = context->skb;
152 struct usb_card_rec *card;
153 int recv_length = urb->actual_length;
154 int size, status;
155
156 if (!adapter || !adapter->card) {
157 pr_err("mwifiex adapter or card structure is not valid\n");
158 return;
159 }
160
161 card = (struct usb_card_rec *)adapter->card;
162 if (card->rx_cmd_ep == context->ep)
163 atomic_dec(&card->rx_cmd_urb_pending);
164 else
165 atomic_dec(&card->rx_data_urb_pending);
166
167 if (recv_length) {
168 if (urb->status || (adapter->surprise_removed)) {
169 dev_err(adapter->dev,
170 "URB status is failed: %d\n", urb->status);
171 /* Do not free skb in case of command ep */
172 if (card->rx_cmd_ep != context->ep)
173 dev_kfree_skb_any(skb);
174 goto setup_for_next;
175 }
176 if (skb->len > recv_length)
177 skb_trim(skb, recv_length);
178 else
179 skb_put(skb, recv_length - skb->len);
180
181 atomic_inc(&adapter->rx_pending);
182 status = mwifiex_usb_recv(adapter, skb, context->ep);
183
184 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
185 recv_length, status);
186 if (status == -EINPROGRESS) {
187 queue_work(adapter->workqueue, &adapter->main_work);
188
189 /* urb for data_ep is re-submitted now;
190 * urb for cmd_ep will be re-submitted in callback
191 * mwifiex_usb_recv_complete
192 */
193 if (card->rx_cmd_ep == context->ep)
194 return;
195 } else {
196 atomic_dec(&adapter->rx_pending);
197 if (status == -1)
198 dev_err(adapter->dev,
199 "received data processing failed!\n");
200
201 /* Do not free skb in case of command ep */
202 if (card->rx_cmd_ep != context->ep)
203 dev_kfree_skb_any(skb);
204 }
205 } else if (urb->status) {
206 if (!adapter->is_suspended) {
207 dev_warn(adapter->dev,
208 "Card is removed: %d\n", urb->status);
209 adapter->surprise_removed = true;
210 }
211 dev_kfree_skb_any(skb);
212 return;
213 } else {
214 /* Do not free skb in case of command ep */
215 if (card->rx_cmd_ep != context->ep)
216 dev_kfree_skb_any(skb);
217
218 /* fall through setup_for_next */
219 }
220
221setup_for_next:
222 if (card->rx_cmd_ep == context->ep)
223 size = MWIFIEX_RX_CMD_BUF_SIZE;
224 else
225 size = MWIFIEX_RX_DATA_BUF_SIZE;
226
227 mwifiex_usb_submit_rx_urb(context, size);
228
229 return;
230}
231
232static void mwifiex_usb_tx_complete(struct urb *urb)
233{
234 struct urb_context *context = (struct urb_context *)(urb->context);
235 struct mwifiex_adapter *adapter = context->adapter;
236 struct usb_card_rec *card = adapter->card;
237
238 dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
239
240 if (context->ep == card->tx_cmd_ep) {
241 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
242 atomic_dec(&card->tx_cmd_urb_pending);
243 adapter->cmd_sent = false;
244 } else {
245 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
246 atomic_dec(&card->tx_data_urb_pending);
47411a06 247 mwifiex_write_data_complete(adapter, context->skb, 0,
4daffe35
AK		 248 urb->status ? -1 : 0);
249 }
250
251 queue_work(adapter->workqueue, &adapter->main_work);
252
253 return;
254}
255
256static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
257{
258 struct mwifiex_adapter *adapter = ctx->adapter;
259 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
260
261 if (card->rx_cmd_ep != ctx->ep) {
262 ctx->skb = dev_alloc_skb(size);
263 if (!ctx->skb) {
264 dev_err(adapter->dev,
265 "%s: dev_alloc_skb failed\n", __func__);
266 return -ENOMEM;
267 }
268 }
269
270 usb_fill_bulk_urb(ctx->urb, card->udev,
271 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
272 size, mwifiex_usb_rx_complete, (void *)ctx);
273
274 if (card->rx_cmd_ep == ctx->ep)
275 atomic_inc(&card->rx_cmd_urb_pending);
276 else
277 atomic_inc(&card->rx_data_urb_pending);
278
279 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
280 dev_err(adapter->dev, "usb_submit_urb failed\n");
281 dev_kfree_skb_any(ctx->skb);
282 ctx->skb = NULL;
283
284 if (card->rx_cmd_ep == ctx->ep)
285 atomic_dec(&card->rx_cmd_urb_pending);
286 else
287 atomic_dec(&card->rx_data_urb_pending);
288
289 return -1;
290 }
291
292 return 0;
293}
294
295static void mwifiex_usb_free(struct usb_card_rec *card)
296{
297 int i;
298
299 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
300 usb_kill_urb(card->rx_cmd.urb);
301
302 usb_free_urb(card->rx_cmd.urb);
303 card->rx_cmd.urb = NULL;
304
305 if (atomic_read(&card->rx_data_urb_pending))
306 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
307 if (card->rx_data_list[i].urb)
308 usb_kill_urb(card->rx_data_list[i].urb);
309
310 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
311 usb_free_urb(card->rx_data_list[i].urb);
312 card->rx_data_list[i].urb = NULL;
313 }
314
315 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
316 usb_free_urb(card->tx_data_list[i].urb);
317 card->tx_data_list[i].urb = NULL;
318 }
319
320 usb_free_urb(card->tx_cmd.urb);
321 card->tx_cmd.urb = NULL;
322
323 return;
324}
325
326/* This function probes an mwifiex device and registers it. It allocates
327 * the card structure, initiates the device registration and initialization
328 * procedure by adding a logical interface.
329 */
330static int mwifiex_usb_probe(struct usb_interface *intf,
331 const struct usb_device_id *id)
332{
333 struct usb_device *udev = interface_to_usbdev(intf);
334 struct usb_host_interface *iface_desc = intf->cur_altsetting;
335 struct usb_endpoint_descriptor *epd;
336 int ret, i;
337 struct usb_card_rec *card;
338 u16 id_vendor, id_product, bcd_device, bcd_usb;
339
340 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
341 if (!card)
342 return -ENOMEM;
343
344 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
345 id_product = le16_to_cpu(udev->descriptor.idProduct);
346 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
347 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
348 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
349 id_vendor, id_product, bcd_device);
350
351 /* PID_1 is used for firmware downloading only */
68458ded
YAP		 352 switch (id_product) {
353 case USB8797_PID_1:
354 case USB8897_PID_1:
355 card->usb_boot_state = USB8XXX_FW_DNLD;
356 break;
357 case USB8797_PID_2:
358 case USB8897_PID_2:
359 card->usb_boot_state = USB8XXX_FW_READY;
360 break;
361 default:
362 pr_warning("unknown id_product %#x\n", id_product);
363 card->usb_boot_state = USB8XXX_FW_DNLD;
364 break;
365 }
4daffe35
AK		 366
367 card->udev = udev;
368 card->intf = intf;
369
69797838 370 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
4daffe35
AK		 371 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
372 udev->descriptor.bDeviceSubClass,
373 udev->descriptor.bDeviceProtocol);
374
375 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
376 epd = &iface_desc->endpoint[i].desc;
377 if (usb_endpoint_dir_in(epd) &&
378 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
379 usb_endpoint_xfer_bulk(epd)) {
380 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
381 le16_to_cpu(epd->wMaxPacketSize),
382 epd->bEndpointAddress);
383 card->rx_cmd_ep = usb_endpoint_num(epd);
384 atomic_set(&card->rx_cmd_urb_pending, 0);
385 }
386 if (usb_endpoint_dir_in(epd) &&
387 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
388 usb_endpoint_xfer_bulk(epd)) {
389 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
390 le16_to_cpu(epd->wMaxPacketSize),
391 epd->bEndpointAddress);
392 card->rx_data_ep = usb_endpoint_num(epd);
393 atomic_set(&card->rx_data_urb_pending, 0);
394 }
395 if (usb_endpoint_dir_out(epd) &&
396 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
397 usb_endpoint_xfer_bulk(epd)) {
398 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
399 le16_to_cpu(epd->wMaxPacketSize),
400 epd->bEndpointAddress);
401 card->tx_data_ep = usb_endpoint_num(epd);
402 atomic_set(&card->tx_data_urb_pending, 0);
403 }
404 if (usb_endpoint_dir_out(epd) &&
405 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
406 usb_endpoint_xfer_bulk(epd)) {
407 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
408 le16_to_cpu(epd->wMaxPacketSize),
409 epd->bEndpointAddress);
410 card->tx_cmd_ep = usb_endpoint_num(epd);
411 atomic_set(&card->tx_cmd_urb_pending, 0);
412 card->bulk_out_maxpktsize =
413 le16_to_cpu(epd->wMaxPacketSize);
414 }
415 }
416
417 usb_set_intfdata(intf, card);
418
419 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
420 MWIFIEX_USB);
421 if (ret) {
422 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
423 usb_reset_device(udev);
424 kfree(card);
425 return ret;
426 }
427
428 usb_get_dev(udev);
429
430 return 0;
431}
432
433/* Kernel needs to suspend all functions separately. Therefore all
434 * registered functions must have drivers with suspend and resume
435 * methods. Failing that the kernel simply removes the whole card.
436 *
437 * If already not suspended, this function allocates and sends a
438 * 'host sleep activate' request to the firmware and turns off the traffic.
439 */
440static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
441{
442 struct usb_card_rec *card = usb_get_intfdata(intf);
443 struct mwifiex_adapter *adapter;
444 int i;
445
446 if (!card || !card->adapter) {
447 pr_err("%s: card or card->adapter is NULL\n", __func__);
448 return 0;
449 }
450 adapter = card->adapter;
451
452 if (unlikely(adapter->is_suspended))
453 dev_warn(adapter->dev, "Device already suspended\n");
454
455 mwifiex_enable_hs(adapter);
456
457 /* 'is_suspended' flag indicates device is suspended.
458 * It must be set here before the usb_kill_urb() calls. Reason
459 * is in the complete handlers, urb->status(= -ENOENT) and
460 * this flag is used in combination to distinguish between a
461 * 'suspended' state and a 'disconnect' one.
462 */
463 adapter->is_suspended = true;
464
4daffe35
AK		 465 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
466 usb_kill_urb(card->rx_cmd.urb);
467
468 if (atomic_read(&card->rx_data_urb_pending))
469 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
470 if (card->rx_data_list[i].urb)
471 usb_kill_urb(card->rx_data_list[i].urb);
472
473 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
474 if (card->tx_data_list[i].urb)
475 usb_kill_urb(card->tx_data_list[i].urb);
476
477 if (card->tx_cmd.urb)
478 usb_kill_urb(card->tx_cmd.urb);
479
480 return 0;
481}
482
483/* Kernel needs to suspend all functions separately. Therefore all
484 * registered functions must have drivers with suspend and resume
485 * methods. Failing that the kernel simply removes the whole card.
486 *
487 * If already not resumed, this function turns on the traffic and
488 * sends a 'host sleep cancel' request to the firmware.
489 */
490static int mwifiex_usb_resume(struct usb_interface *intf)
491{
492 struct usb_card_rec *card = usb_get_intfdata(intf);
493 struct mwifiex_adapter *adapter;
494 int i;
495
496 if (!card || !card->adapter) {
497 pr_err("%s: card or card->adapter is NULL\n", __func__);
498 return 0;
499 }
500 adapter = card->adapter;
501
502 if (unlikely(!adapter->is_suspended)) {
503 dev_warn(adapter->dev, "Device already resumed\n");
504 return 0;
505 }
506
507 /* Indicate device resumed. The netdev queue will be resumed only
508 * after the urbs have been re-submitted
509 */
510 adapter->is_suspended = false;
511
512 if (!atomic_read(&card->rx_data_urb_pending))
513 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
514 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
515 MWIFIEX_RX_DATA_BUF_SIZE);
516
517 if (!atomic_read(&card->rx_cmd_urb_pending)) {
518 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
519 if (card->rx_cmd.skb)
520 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
521 MWIFIEX_RX_CMD_BUF_SIZE);
522 }
523
4daffe35
AK		 524 /* Disable Host Sleep */
525 if (adapter->hs_activated)
526 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
527 MWIFIEX_BSS_ROLE_ANY),
528 MWIFIEX_ASYNC_CMD);
529
530#ifdef CONFIG_PM
531 /* Resume handler may be called due to remote wakeup,
532 * force to exit suspend anyway
533 */
534 usb_disable_autosuspend(card->udev);
535#endif /* CONFIG_PM */
536
537 return 0;
538}
539
540static void mwifiex_usb_disconnect(struct usb_interface *intf)
541{
542 struct usb_card_rec *card = usb_get_intfdata(intf);
4daffe35 543
353d2a69
UR		 544 if (!card) {
545 pr_err("%s: card is NULL\n", __func__);
4daffe35
AK		 546 return;
547 }
548
4daffe35
AK		 549 mwifiex_usb_free(card);
550
353d2a69
UR		 551 if (card->adapter) {
552 struct mwifiex_adapter *adapter = card->adapter;
553
554 if (!adapter->priv_num)
555 return;
556
557 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
558 mwifiex_remove_card(adapter, &add_remove_card_sem);
559 }
4daffe35
AK		 560
561 usb_set_intfdata(intf, NULL);
562 usb_put_dev(interface_to_usbdev(intf));
563 kfree(card);
353d2a69 564 usb_card = NULL;
4daffe35
AK		 565
566 return;
567}
568
569static struct usb_driver mwifiex_usb_driver = {
570 .name = usbdriver_name,
571 .probe = mwifiex_usb_probe,
572 .disconnect = mwifiex_usb_disconnect,
573 .id_table = mwifiex_usb_table,
574 .suspend = mwifiex_usb_suspend,
575 .resume = mwifiex_usb_resume,
576 .supports_autosuspend = 1,
577};
578
579static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
580{
581 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
582 int i;
583
584 card->tx_cmd.adapter = adapter;
585 card->tx_cmd.ep = card->tx_cmd_ep;
586
587 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
588 if (!card->tx_cmd.urb) {
589 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
590 return -ENOMEM;
591 }
592
593 card->tx_data_ix = 0;
594
595 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
596 card->tx_data_list[i].adapter = adapter;
597 card->tx_data_list[i].ep = card->tx_data_ep;
598
599 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
600 if (!card->tx_data_list[i].urb) {
601 dev_err(adapter->dev,
602 "tx_data_list[] urb allocation failed\n");
603 return -ENOMEM;
604 }
605 }
606
607 return 0;
608}
609
610static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
611{
612 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
613 int i;
614
615 card->rx_cmd.adapter = adapter;
616 card->rx_cmd.ep = card->rx_cmd_ep;
617
618 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
619 if (!card->rx_cmd.urb) {
620 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
621 return -ENOMEM;
622 }
623
624 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
625 if (!card->rx_cmd.skb) {
626 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
627 return -ENOMEM;
628 }
629
630 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
631 return -1;
632
633 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
634 card->rx_data_list[i].adapter = adapter;
635 card->rx_data_list[i].ep = card->rx_data_ep;
636
637 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
638 if (!card->rx_data_list[i].urb) {
639 dev_err(adapter->dev,
640 "rx_data_list[] urb allocation failed\n");
641 return -1;
642 }
643 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
644 MWIFIEX_RX_DATA_BUF_SIZE))
645 return -1;
646 }
647
648 return 0;
649}
650
651static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
652 u32 *len, u8 ep, u32 timeout)
653{
654 struct usb_card_rec *card = adapter->card;
655 int actual_length, ret;
656
657 if (!(*len % card->bulk_out_maxpktsize))
658 (*len)++;
659
660 /* Send the data block */
661 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
662 *len, &actual_length, timeout);
663 if (ret) {
664 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
5b2e2ecc 665 return ret;
4daffe35
AK		 666 }
667
668 *len = actual_length;
669
670 return ret;
671}
672
673static int mwifiex_read_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 /* Receive the data response */
680 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
681 *len, &actual_length, timeout);
682 if (ret) {
683 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
5b2e2ecc 684 return ret;
4daffe35
AK		 685 }
686
687 *len = actual_length;
688
689 return ret;
690}
691
692/* This function write a command/data packet to card. */
693static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
694 struct sk_buff *skb,
695 struct mwifiex_tx_param *tx_param)
696{
697 struct usb_card_rec *card = adapter->card;
698 struct urb_context *context;
699 u8 *data = (u8 *)skb->data;
700 struct urb *tx_urb;
701
702 if (adapter->is_suspended) {
703 dev_err(adapter->dev,
704 "%s: not allowed while suspended\n", __func__);
705 return -1;
706 }
707
708 if (adapter->surprise_removed) {
709 dev_err(adapter->dev, "%s: device removed\n", __func__);
710 return -1;
711 }
712
713 if (ep == card->tx_data_ep &&
714 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
715 return -EBUSY;
716 }
717
718 dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
719
720 if (ep == card->tx_cmd_ep) {
721 context = &card->tx_cmd;
722 } else {
723 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
724 card->tx_data_ix = 0;
725 context = &card->tx_data_list[card->tx_data_ix++];
726 }
727
728 context->adapter = adapter;
729 context->ep = ep;
730 context->skb = skb;
731 tx_urb = context->urb;
732
733 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
734 data, skb->len, mwifiex_usb_tx_complete,
735 (void *)context);
736
737 tx_urb->transfer_flags |= URB_ZERO_PACKET;
738
739 if (ep == card->tx_cmd_ep)
740 atomic_inc(&card->tx_cmd_urb_pending);
741 else
742 atomic_inc(&card->tx_data_urb_pending);
743
744 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
745 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
746 if (ep == card->tx_cmd_ep) {
747 atomic_dec(&card->tx_cmd_urb_pending);
748 } else {
749 atomic_dec(&card->tx_data_urb_pending);
750 if (card->tx_data_ix)
751 card->tx_data_ix--;
752 else
753 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
754 }
755
756 return -1;
757 } else {
758 if (ep == card->tx_data_ep &&
759 atomic_read(&card->tx_data_urb_pending) ==
760 MWIFIEX_TX_DATA_URB)
761 return -ENOSR;
762 }
763
764 return -EINPROGRESS;
765}
766
767/* This function register usb device and initialize parameter. */
768static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
769{
770 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
771
772 card->adapter = adapter;
773 adapter->dev = &card->udev->dev;
353d2a69 774 usb_card = card;
4daffe35 775
68458ded
YAP		 776 switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
777 case USB8897_PID_1:
778 case USB8897_PID_2:
779 strcpy(adapter->fw_name, USB8897_DEFAULT_FW_NAME);
780 break;
781 case USB8797_PID_1:
782 case USB8797_PID_2:
783 default:
784 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
785 break;
786 }
787
4daffe35
AK		 788 return 0;
789}
790
2739a95d
AK		 791static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
792{
793 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
794
353d2a69 795 card->adapter = NULL;
2739a95d
AK		 796}
797
4daffe35
AK		 798static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
799 struct mwifiex_fw_image *fw)
800{
801 int ret = 0;
802 u8 *firmware = fw->fw_buf, *recv_buff;
68458ded 803 u32 retries = USB8XXX_FW_MAX_RETRY, dlen;
4daffe35
AK		 804 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
805 struct fw_data *fwdata;
806 struct fw_sync_header sync_fw;
807 u8 check_winner = 1;
808
809 if (!firmware) {
810 dev_err(adapter->dev,
811 "No firmware image found! Terminating download\n");
812 ret = -1;
813 goto fw_exit;
814 }
815
816 /* Allocate memory for transmit */
817 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
818 if (!fwdata)
819 goto fw_exit;
820
821 /* Allocate memory for receive */
822 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
823 if (!recv_buff)
824 goto cleanup;
825
826 do {
827 /* Send pseudo data to check winner status first */
828 if (check_winner) {
829 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
830 dlen = 0;
831 } else {
832 /* copy the header of the fw_data to get the length */
fc40ca92
SL		 833 memcpy(&fwdata->fw_hdr, &firmware[tlen],
834 sizeof(struct fw_header));
4daffe35
AK		 835
836 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
837 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
838 tlen += sizeof(struct fw_header);
839
fc40ca92 840 memcpy(fwdata->data, &firmware[tlen], dlen);
4daffe35
AK		 841
842 fwdata->seq_num = cpu_to_le32(fw_seqnum);
843 tlen += dlen;
844 }
845
846 /* If the send/receive fails or CRC occurs then retry */
847 while (retries--) {
848 u8 *buf = (u8 *)fwdata;
849 u32 len = FW_DATA_XMIT_SIZE;
850
851 /* send the firmware block */
852 ret = mwifiex_write_data_sync(adapter, buf, &len,
853 MWIFIEX_USB_EP_CMD_EVENT,
854 MWIFIEX_USB_TIMEOUT);
855 if (ret) {
856 dev_err(adapter->dev,
857 "write_data_sync: failed: %d\n", ret);
858 continue;
859 }
860
861 buf = recv_buff;
862 len = FW_DNLD_RX_BUF_SIZE;
863
864 /* Receive the firmware block response */
865 ret = mwifiex_read_data_sync(adapter, buf, &len,
866 MWIFIEX_USB_EP_CMD_EVENT,
867 MWIFIEX_USB_TIMEOUT);
868 if (ret) {
869 dev_err(adapter->dev,
870 "read_data_sync: failed: %d\n", ret);
871 continue;
872 }
873
874 memcpy(&sync_fw, recv_buff,
875 sizeof(struct fw_sync_header));
876
877 /* check 1st firmware block resp for highest bit set */
878 if (check_winner) {
879 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
880 dev_warn(adapter->dev,
881 "USB is not the winner %#x\n",
882 sync_fw.cmd);
883
884 /* returning success */
885 ret = 0;
886 goto cleanup;
887 }
888
889 dev_dbg(adapter->dev,
890 "USB is the winner, start to download FW\n");
891
892 check_winner = 0;
893 break;
894 }
895
896 /* check the firmware block response for CRC errors */
897 if (sync_fw.cmd) {
898 dev_err(adapter->dev,
899 "FW received block with CRC %#x\n",
900 sync_fw.cmd);
901 ret = -1;
902 continue;
903 }
904
68458ded 905 retries = USB8XXX_FW_MAX_RETRY;
4daffe35
AK		 906 break;
907 }
908 fw_seqnum++;
909 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
910
911cleanup:
912 dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
913
914 kfree(recv_buff);
915 kfree(fwdata);
916
917 if (retries)
918 ret = 0;
919fw_exit:
920 return ret;
921}
922
923static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
924 struct mwifiex_fw_image *fw)
925{
926 int ret;
927 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
928
68458ded 929 if (card->usb_boot_state == USB8XXX_FW_DNLD) {
4daffe35
AK		 930 ret = mwifiex_prog_fw_w_helper(adapter, fw);
931 if (ret)
932 return -1;
933
934 /* Boot state changes after successful firmware download */
68458ded 935 if (card->usb_boot_state == USB8XXX_FW_DNLD)
4daffe35
AK		 936 return -1;
937 }
938
939 ret = mwifiex_usb_rx_init(adapter);
940 if (!ret)
941 ret = mwifiex_usb_tx_init(adapter);
942
943 return ret;
944}
945
946static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
947{
948 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
949
950 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
951 if ((ep == card->rx_cmd_ep) &&
952 (!atomic_read(&card->rx_cmd_urb_pending)))
953 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
954 MWIFIEX_RX_CMD_BUF_SIZE);
955
956 return;
957}
958
959static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
960 struct sk_buff *skb)
961{
962 atomic_dec(&adapter->rx_pending);
963 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
964
965 return 0;
966}
967
ca8d6dfc 968static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter)
4daffe35
AK		 969{
970 atomic_dec(&adapter->rx_pending);
4daffe35
AK		 971
972 return 0;
973}
974
975/* This function wakes up the card. */
976static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
977{
978 /* Simulation of HS_AWAKE event */
979 adapter->pm_wakeup_fw_try = false;
980 adapter->pm_wakeup_card_req = false;
981 adapter->ps_state = PS_STATE_AWAKE;
982
983 return 0;
984}
985
986static struct mwifiex_if_ops usb_ops = {
987 .register_dev = mwifiex_register_dev,
2739a95d 988 .unregister_dev = mwifiex_unregister_dev,
4daffe35
AK		 989 .wakeup = mwifiex_pm_wakeup_card,
990 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
991
992 /* USB specific */
993 .dnld_fw = mwifiex_usb_dnld_fw,
994 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
995 .event_complete = mwifiex_usb_cmd_event_complete,
996 .data_complete = mwifiex_usb_data_complete,
997 .host_to_card = mwifiex_usb_host_to_card,
998};
999
1000/* This function initializes the USB driver module.
1001 *
1002 * This initiates the semaphore and registers the device with
1003 * USB bus.
1004 */
1005static int mwifiex_usb_init_module(void)
1006{
1007 int ret;
1008
1009 pr_debug("Marvell USB8797 Driver\n");
1010
1011 sema_init(&add_remove_card_sem, 1);
1012
1013 ret = usb_register(&mwifiex_usb_driver);
1014 if (ret)
1015 pr_err("Driver register failed!\n");
1016 else
1017 pr_debug("info: Driver registered successfully!\n");
1018
1019 return ret;
1020}
1021
1022/* This function cleans up the USB driver.
1023 *
1024 * The following major steps are followed in .disconnect for cleanup:
1025 * - Resume the device if its suspended
1026 * - Disconnect the device if connected
1027 * - Shutdown the firmware
1028 * - Unregister the device from USB bus.
1029 */
1030static void mwifiex_usb_cleanup_module(void)
1031{
1032 if (!down_interruptible(&add_remove_card_sem))
1033 up(&add_remove_card_sem);
1034
353d2a69 1035 if (usb_card && usb_card->adapter) {
027d3307
AK		 1036 struct mwifiex_adapter *adapter = usb_card->adapter;
1037 int i;
1038
1039 /* In case driver is removed when asynchronous FW downloading is
1040 * in progress
1041 */
1042 wait_for_completion(&adapter->fw_load);
1043
1044#ifdef CONFIG_PM
1045 if (adapter->is_suspended)
1046 mwifiex_usb_resume(usb_card->intf);
1047#endif
1048 for (i = 0; i < adapter->priv_num; i++)
1049 if ((GET_BSS_ROLE(adapter->priv[i]) ==
1050 MWIFIEX_BSS_ROLE_STA) &&
1051 adapter->priv[i]->media_connected)
1052 mwifiex_deauthenticate(adapter->priv[i], NULL);
1053
1054 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
1055 MWIFIEX_BSS_ROLE_ANY),
1056 MWIFIEX_FUNC_SHUTDOWN);
1057 }
4daffe35
AK		 1058
1059 usb_deregister(&mwifiex_usb_driver);
1060}
1061
1062module_init(mwifiex_usb_init_module);
1063module_exit(mwifiex_usb_cleanup_module);
1064
1065MODULE_AUTHOR("Marvell International Ltd.");
1066MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1067MODULE_VERSION(USB_VERSION);
1068MODULE_LICENSE("GPL v2");
68458ded
YAP		 1069MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1070MODULE_FIRMWARE(USB8897_DEFAULT_FW_NAME);
Linux kernel - Deliverables
This page took 0.336296 seconds and 5 git commands to generate.