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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
25static const char usbdriver_name[] = "usb8797";
26
27static u8 user_rmmod;
28static struct mwifiex_if_ops usb_ops;
29static struct semaphore add_remove_card_sem;
30
31static struct usb_device_id mwifiex_usb_table[] = {
32 {USB_DEVICE(USB8797_VID, USB8797_PID_1)},
33 {USB_DEVICE_AND_INTERFACE_INFO(USB8797_VID, USB8797_PID_2,
34 USB_CLASS_VENDOR_SPEC,
35 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
36 { } /* Terminating entry */
37};
38
39MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
40
41static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
42
43/* This function handles received packet. Necessary action is taken based on
44 * cmd/event/data.
45 */
46static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
47 struct sk_buff *skb, u8 ep)
48{
49 struct device *dev = adapter->dev;
50 u32 recv_type;
51 __le32 tmp;
52 int ret;
53
54 if (adapter->hs_activated)
55 mwifiex_process_hs_config(adapter);
56
57 if (skb->len < INTF_HEADER_LEN) {
58 dev_err(dev, "%s: invalid skb->len\n", __func__);
59 return -1;
60 }
61
62 switch (ep) {
63 case MWIFIEX_USB_EP_CMD_EVENT:
64 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
65 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
66 recv_type = le32_to_cpu(tmp);
67 skb_pull(skb, INTF_HEADER_LEN);
68
69 switch (recv_type) {
70 case MWIFIEX_USB_TYPE_CMD:
71 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
72 dev_err(dev, "CMD: skb->len too large\n");
73 ret = -1;
74 goto exit_restore_skb;
75 } else if (!adapter->curr_cmd) {
76 dev_dbg(dev, "CMD: no curr_cmd\n");
77 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
78 mwifiex_process_sleep_confirm_resp(
79 adapter, skb->data,
80 skb->len);
81 ret = 0;
82 goto exit_restore_skb;
83 }
84 ret = -1;
85 goto exit_restore_skb;
86 }
87
88 adapter->curr_cmd->resp_skb = skb;
89 adapter->cmd_resp_received = true;
90 break;
91 case MWIFIEX_USB_TYPE_EVENT:
92 if (skb->len < sizeof(u32)) {
93 dev_err(dev, "EVENT: skb->len too small\n");
94 ret = -1;
95 goto exit_restore_skb;
96 }
97 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
98 adapter->event_cause = le32_to_cpu(tmp);
99 dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
100
101 if (skb->len > MAX_EVENT_SIZE) {
102 dev_err(dev, "EVENT: event body too large\n");
103 ret = -1;
104 goto exit_restore_skb;
105 }
106
107 memcpy(adapter->event_body, skb->data +
108 MWIFIEX_EVENT_HEADER_LEN, skb->len);
109
110 adapter->event_received = true;
111 adapter->event_skb = skb;
112 break;
113 default:
114 dev_err(dev, "unknown recv_type %#x\n", recv_type);
115 return -1;
116 }
117 break;
118 case MWIFIEX_USB_EP_DATA:
119 dev_dbg(dev, "%s: EP_DATA\n", __func__);
120 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
121 dev_err(dev, "DATA: skb->len too large\n");
122 return -1;
123 }
124 skb_queue_tail(&adapter->usb_rx_data_q, skb);
125 adapter->data_received = true;
126 break;
127 default:
128 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
129 return -1;
130 }
131
132 return -EINPROGRESS;
133
134exit_restore_skb:
135 /* The buffer will be reused for further cmds/events */
136 skb_push(skb, INTF_HEADER_LEN);
137
138 return ret;
139}
140
141static void mwifiex_usb_rx_complete(struct urb *urb)
142{
143 struct urb_context *context = (struct urb_context *)urb->context;
144 struct mwifiex_adapter *adapter = context->adapter;
145 struct sk_buff *skb = context->skb;
146 struct usb_card_rec *card;
147 int recv_length = urb->actual_length;
148 int size, status;
149
150 if (!adapter || !adapter->card) {
151 pr_err("mwifiex adapter or card structure is not valid\n");
152 return;
153 }
154
155 card = (struct usb_card_rec *)adapter->card;
156 if (card->rx_cmd_ep == context->ep)
157 atomic_dec(&card->rx_cmd_urb_pending);
158 else
159 atomic_dec(&card->rx_data_urb_pending);
160
161 if (recv_length) {
162 if (urb->status || (adapter->surprise_removed)) {
163 dev_err(adapter->dev,
164 "URB status is failed: %d\n", urb->status);
165 /* Do not free skb in case of command ep */
166 if (card->rx_cmd_ep != context->ep)
167 dev_kfree_skb_any(skb);
168 goto setup_for_next;
169 }
170 if (skb->len > recv_length)
171 skb_trim(skb, recv_length);
172 else
173 skb_put(skb, recv_length - skb->len);
174
175 atomic_inc(&adapter->rx_pending);
176 status = mwifiex_usb_recv(adapter, skb, context->ep);
177
178 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
179 recv_length, status);
180 if (status == -EINPROGRESS) {
181 queue_work(adapter->workqueue, &adapter->main_work);
182
183 /* urb for data_ep is re-submitted now;
184 * urb for cmd_ep will be re-submitted in callback
185 * mwifiex_usb_recv_complete
186 */
187 if (card->rx_cmd_ep == context->ep)
188 return;
189 } else {
190 atomic_dec(&adapter->rx_pending);
191 if (status == -1)
192 dev_err(adapter->dev,
193 "received data processing failed!\n");
194
195 /* Do not free skb in case of command ep */
196 if (card->rx_cmd_ep != context->ep)
197 dev_kfree_skb_any(skb);
198 }
199 } else if (urb->status) {
200 if (!adapter->is_suspended) {
201 dev_warn(adapter->dev,
202 "Card is removed: %d\n", urb->status);
203 adapter->surprise_removed = true;
204 }
205 dev_kfree_skb_any(skb);
206 return;
207 } else {
208 /* Do not free skb in case of command ep */
209 if (card->rx_cmd_ep != context->ep)
210 dev_kfree_skb_any(skb);
211
212 /* fall through setup_for_next */
213 }
214
215setup_for_next:
216 if (card->rx_cmd_ep == context->ep)
217 size = MWIFIEX_RX_CMD_BUF_SIZE;
218 else
219 size = MWIFIEX_RX_DATA_BUF_SIZE;
220
221 mwifiex_usb_submit_rx_urb(context, size);
222
223 return;
224}
225
226static void mwifiex_usb_tx_complete(struct urb *urb)
227{
228 struct urb_context *context = (struct urb_context *)(urb->context);
229 struct mwifiex_adapter *adapter = context->adapter;
230 struct usb_card_rec *card = adapter->card;
231
232 dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
233
234 if (context->ep == card->tx_cmd_ep) {
235 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
236 atomic_dec(&card->tx_cmd_urb_pending);
237 adapter->cmd_sent = false;
238 } else {
239 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
240 atomic_dec(&card->tx_data_urb_pending);
241 mwifiex_write_data_complete(adapter, context->skb,
242 urb->status ? -1 : 0);
243 }
244
245 queue_work(adapter->workqueue, &adapter->main_work);
246
247 return;
248}
249
250static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
251{
252 struct mwifiex_adapter *adapter = ctx->adapter;
253 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
254
255 if (card->rx_cmd_ep != ctx->ep) {
256 ctx->skb = dev_alloc_skb(size);
257 if (!ctx->skb) {
258 dev_err(adapter->dev,
259 "%s: dev_alloc_skb failed\n", __func__);
260 return -ENOMEM;
261 }
262 }
263
264 usb_fill_bulk_urb(ctx->urb, card->udev,
265 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
266 size, mwifiex_usb_rx_complete, (void *)ctx);
267
268 if (card->rx_cmd_ep == ctx->ep)
269 atomic_inc(&card->rx_cmd_urb_pending);
270 else
271 atomic_inc(&card->rx_data_urb_pending);
272
273 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
274 dev_err(adapter->dev, "usb_submit_urb failed\n");
275 dev_kfree_skb_any(ctx->skb);
276 ctx->skb = NULL;
277
278 if (card->rx_cmd_ep == ctx->ep)
279 atomic_dec(&card->rx_cmd_urb_pending);
280 else
281 atomic_dec(&card->rx_data_urb_pending);
282
283 return -1;
284 }
285
286 return 0;
287}
288
289static void mwifiex_usb_free(struct usb_card_rec *card)
290{
291 int i;
292
293 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
294 usb_kill_urb(card->rx_cmd.urb);
295
296 usb_free_urb(card->rx_cmd.urb);
297 card->rx_cmd.urb = NULL;
298
299 if (atomic_read(&card->rx_data_urb_pending))
300 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
301 if (card->rx_data_list[i].urb)
302 usb_kill_urb(card->rx_data_list[i].urb);
303
304 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
305 usb_free_urb(card->rx_data_list[i].urb);
306 card->rx_data_list[i].urb = NULL;
307 }
308
309 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
310 usb_free_urb(card->tx_data_list[i].urb);
311 card->tx_data_list[i].urb = NULL;
312 }
313
314 usb_free_urb(card->tx_cmd.urb);
315 card->tx_cmd.urb = NULL;
316
317 return;
318}
319
320/* This function probes an mwifiex device and registers it. It allocates
321 * the card structure, initiates the device registration and initialization
322 * procedure by adding a logical interface.
323 */
324static int mwifiex_usb_probe(struct usb_interface *intf,
325 const struct usb_device_id *id)
326{
327 struct usb_device *udev = interface_to_usbdev(intf);
328 struct usb_host_interface *iface_desc = intf->cur_altsetting;
329 struct usb_endpoint_descriptor *epd;
330 int ret, i;
331 struct usb_card_rec *card;
332 u16 id_vendor, id_product, bcd_device, bcd_usb;
333
334 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
335 if (!card)
336 return -ENOMEM;
337
338 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
339 id_product = le16_to_cpu(udev->descriptor.idProduct);
340 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
341 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
342 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
343 id_vendor, id_product, bcd_device);
344
345 /* PID_1 is used for firmware downloading only */
346 if (id_product == USB8797_PID_1)
347 card->usb_boot_state = USB8797_FW_DNLD;
348 else
349 card->usb_boot_state = USB8797_FW_READY;
350
351 card->udev = udev;
352 card->intf = intf;
353
354 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocl=%#x\n",
355 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
356 udev->descriptor.bDeviceSubClass,
357 udev->descriptor.bDeviceProtocol);
358
359 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
360 epd = &iface_desc->endpoint[i].desc;
361 if (usb_endpoint_dir_in(epd) &&
362 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
363 usb_endpoint_xfer_bulk(epd)) {
364 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
365 le16_to_cpu(epd->wMaxPacketSize),
366 epd->bEndpointAddress);
367 card->rx_cmd_ep = usb_endpoint_num(epd);
368 atomic_set(&card->rx_cmd_urb_pending, 0);
369 }
370 if (usb_endpoint_dir_in(epd) &&
371 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
372 usb_endpoint_xfer_bulk(epd)) {
373 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
374 le16_to_cpu(epd->wMaxPacketSize),
375 epd->bEndpointAddress);
376 card->rx_data_ep = usb_endpoint_num(epd);
377 atomic_set(&card->rx_data_urb_pending, 0);
378 }
379 if (usb_endpoint_dir_out(epd) &&
380 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
381 usb_endpoint_xfer_bulk(epd)) {
382 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
383 le16_to_cpu(epd->wMaxPacketSize),
384 epd->bEndpointAddress);
385 card->tx_data_ep = usb_endpoint_num(epd);
386 atomic_set(&card->tx_data_urb_pending, 0);
387 }
388 if (usb_endpoint_dir_out(epd) &&
389 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
390 usb_endpoint_xfer_bulk(epd)) {
391 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
392 le16_to_cpu(epd->wMaxPacketSize),
393 epd->bEndpointAddress);
394 card->tx_cmd_ep = usb_endpoint_num(epd);
395 atomic_set(&card->tx_cmd_urb_pending, 0);
396 card->bulk_out_maxpktsize =
397 le16_to_cpu(epd->wMaxPacketSize);
398 }
399 }
400
401 usb_set_intfdata(intf, card);
402
403 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
404 MWIFIEX_USB);
405 if (ret) {
406 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
407 usb_reset_device(udev);
408 kfree(card);
409 return ret;
410 }
411
412 usb_get_dev(udev);
413
414 return 0;
415}
416
417/* Kernel needs to suspend all functions separately. Therefore all
418 * registered functions must have drivers with suspend and resume
419 * methods. Failing that the kernel simply removes the whole card.
420 *
421 * If already not suspended, this function allocates and sends a
422 * 'host sleep activate' request to the firmware and turns off the traffic.
423 */
424static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
425{
426 struct usb_card_rec *card = usb_get_intfdata(intf);
427 struct mwifiex_adapter *adapter;
428 int i;
429
430 if (!card || !card->adapter) {
431 pr_err("%s: card or card->adapter is NULL\n", __func__);
432 return 0;
433 }
434 adapter = card->adapter;
435
436 if (unlikely(adapter->is_suspended))
437 dev_warn(adapter->dev, "Device already suspended\n");
438
439 mwifiex_enable_hs(adapter);
440
441 /* 'is_suspended' flag indicates device is suspended.
442 * It must be set here before the usb_kill_urb() calls. Reason
443 * is in the complete handlers, urb->status(= -ENOENT) and
444 * this flag is used in combination to distinguish between a
445 * 'suspended' state and a 'disconnect' one.
446 */
447 adapter->is_suspended = true;
448
449 for (i = 0; i < adapter->priv_num; i++)
450 netif_carrier_off(adapter->priv[i]->netdev);
451
452 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
453 usb_kill_urb(card->rx_cmd.urb);
454
455 if (atomic_read(&card->rx_data_urb_pending))
456 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
457 if (card->rx_data_list[i].urb)
458 usb_kill_urb(card->rx_data_list[i].urb);
459
460 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
461 if (card->tx_data_list[i].urb)
462 usb_kill_urb(card->tx_data_list[i].urb);
463
464 if (card->tx_cmd.urb)
465 usb_kill_urb(card->tx_cmd.urb);
466
467 return 0;
468}
469
470/* Kernel needs to suspend all functions separately. Therefore all
471 * registered functions must have drivers with suspend and resume
472 * methods. Failing that the kernel simply removes the whole card.
473 *
474 * If already not resumed, this function turns on the traffic and
475 * sends a 'host sleep cancel' request to the firmware.
476 */
477static int mwifiex_usb_resume(struct usb_interface *intf)
478{
479 struct usb_card_rec *card = usb_get_intfdata(intf);
480 struct mwifiex_adapter *adapter;
481 int i;
482
483 if (!card || !card->adapter) {
484 pr_err("%s: card or card->adapter is NULL\n", __func__);
485 return 0;
486 }
487 adapter = card->adapter;
488
489 if (unlikely(!adapter->is_suspended)) {
490 dev_warn(adapter->dev, "Device already resumed\n");
491 return 0;
492 }
493
494 /* Indicate device resumed. The netdev queue will be resumed only
495 * after the urbs have been re-submitted
496 */
497 adapter->is_suspended = false;
498
499 if (!atomic_read(&card->rx_data_urb_pending))
500 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
501 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
502 MWIFIEX_RX_DATA_BUF_SIZE);
503
504 if (!atomic_read(&card->rx_cmd_urb_pending)) {
505 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
506 if (card->rx_cmd.skb)
507 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
508 MWIFIEX_RX_CMD_BUF_SIZE);
509 }
510
511 for (i = 0; i < adapter->priv_num; i++)
512 if (adapter->priv[i]->media_connected)
513 netif_carrier_on(adapter->priv[i]->netdev);
514
515 /* Disable Host Sleep */
516 if (adapter->hs_activated)
517 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
518 MWIFIEX_BSS_ROLE_ANY),
519 MWIFIEX_ASYNC_CMD);
520
521#ifdef CONFIG_PM
522 /* Resume handler may be called due to remote wakeup,
523 * force to exit suspend anyway
524 */
525 usb_disable_autosuspend(card->udev);
526#endif /* CONFIG_PM */
527
528 return 0;
529}
530
531static void mwifiex_usb_disconnect(struct usb_interface *intf)
532{
533 struct usb_card_rec *card = usb_get_intfdata(intf);
534 struct mwifiex_adapter *adapter;
535 int i;
536
537 if (!card || !card->adapter) {
538 pr_err("%s: card or card->adapter is NULL\n", __func__);
539 return;
540 }
541
542 adapter = card->adapter;
543 if (!adapter->priv_num)
544 return;
545
546 /* In case driver is removed when asynchronous FW downloading is
547 * in progress
548 */
549 wait_for_completion(&adapter->fw_load);
550
551 if (user_rmmod) {
552#ifdef CONFIG_PM
553 if (adapter->is_suspended)
554 mwifiex_usb_resume(intf);
555#endif
556 for (i = 0; i < adapter->priv_num; i++)
557 if ((GET_BSS_ROLE(adapter->priv[i]) ==
558 MWIFIEX_BSS_ROLE_STA) &&
559 adapter->priv[i]->media_connected)
560 mwifiex_deauthenticate(adapter->priv[i], NULL);
561
562 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
563 MWIFIEX_BSS_ROLE_ANY),
564 MWIFIEX_FUNC_SHUTDOWN);
565 }
566
567 mwifiex_usb_free(card);
568
569 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
570 mwifiex_remove_card(adapter, &add_remove_card_sem);
571
572 usb_set_intfdata(intf, NULL);
573 usb_put_dev(interface_to_usbdev(intf));
574 kfree(card);
575
576 return;
577}
578
579static struct usb_driver mwifiex_usb_driver = {
580 .name = usbdriver_name,
581 .probe = mwifiex_usb_probe,
582 .disconnect = mwifiex_usb_disconnect,
583 .id_table = mwifiex_usb_table,
584 .suspend = mwifiex_usb_suspend,
585 .resume = mwifiex_usb_resume,
586 .supports_autosuspend = 1,
587};
588
589static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
590{
591 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
592 int i;
593
594 card->tx_cmd.adapter = adapter;
595 card->tx_cmd.ep = card->tx_cmd_ep;
596
597 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
598 if (!card->tx_cmd.urb) {
599 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
600 return -ENOMEM;
601 }
602
603 card->tx_data_ix = 0;
604
605 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
606 card->tx_data_list[i].adapter = adapter;
607 card->tx_data_list[i].ep = card->tx_data_ep;
608
609 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
610 if (!card->tx_data_list[i].urb) {
611 dev_err(adapter->dev,
612 "tx_data_list[] urb allocation failed\n");
613 return -ENOMEM;
614 }
615 }
616
617 return 0;
618}
619
620static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
621{
622 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
623 int i;
624
625 card->rx_cmd.adapter = adapter;
626 card->rx_cmd.ep = card->rx_cmd_ep;
627
628 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
629 if (!card->rx_cmd.urb) {
630 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
631 return -ENOMEM;
632 }
633
634 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
635 if (!card->rx_cmd.skb) {
636 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
637 return -ENOMEM;
638 }
639
640 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
641 return -1;
642
643 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
644 card->rx_data_list[i].adapter = adapter;
645 card->rx_data_list[i].ep = card->rx_data_ep;
646
647 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
648 if (!card->rx_data_list[i].urb) {
649 dev_err(adapter->dev,
650 "rx_data_list[] urb allocation failed\n");
651 return -1;
652 }
653 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
654 MWIFIEX_RX_DATA_BUF_SIZE))
655 return -1;
656 }
657
658 return 0;
659}
660
661static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
662 u32 *len, u8 ep, u32 timeout)
663{
664 struct usb_card_rec *card = adapter->card;
665 int actual_length, ret;
666
667 if (!(*len % card->bulk_out_maxpktsize))
668 (*len)++;
669
670 /* Send the data block */
671 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
672 *len, &actual_length, timeout);
673 if (ret) {
674 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
675 ret = -1;
676 }
677
678 *len = actual_length;
679
680 return ret;
681}
682
683static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
684 u32 *len, u8 ep, u32 timeout)
685{
686 struct usb_card_rec *card = adapter->card;
687 int actual_length, ret;
688
689 /* Receive the data response */
690 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
691 *len, &actual_length, timeout);
692 if (ret) {
693 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
694 ret = -1;
695 }
696
697 *len = actual_length;
698
699 return ret;
700}
701
702/* This function write a command/data packet to card. */
703static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
704 struct sk_buff *skb,
705 struct mwifiex_tx_param *tx_param)
706{
707 struct usb_card_rec *card = adapter->card;
708 struct urb_context *context;
709 u8 *data = (u8 *)skb->data;
710 struct urb *tx_urb;
711
712 if (adapter->is_suspended) {
713 dev_err(adapter->dev,
714 "%s: not allowed while suspended\n", __func__);
715 return -1;
716 }
717
718 if (adapter->surprise_removed) {
719 dev_err(adapter->dev, "%s: device removed\n", __func__);
720 return -1;
721 }
722
723 if (ep == card->tx_data_ep &&
724 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
725 return -EBUSY;
726 }
727
728 dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
729
730 if (ep == card->tx_cmd_ep) {
731 context = &card->tx_cmd;
732 } else {
733 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
734 card->tx_data_ix = 0;
735 context = &card->tx_data_list[card->tx_data_ix++];
736 }
737
738 context->adapter = adapter;
739 context->ep = ep;
740 context->skb = skb;
741 tx_urb = context->urb;
742
743 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
744 data, skb->len, mwifiex_usb_tx_complete,
745 (void *)context);
746
747 tx_urb->transfer_flags |= URB_ZERO_PACKET;
748
749 if (ep == card->tx_cmd_ep)
750 atomic_inc(&card->tx_cmd_urb_pending);
751 else
752 atomic_inc(&card->tx_data_urb_pending);
753
754 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
755 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
756 if (ep == card->tx_cmd_ep) {
757 atomic_dec(&card->tx_cmd_urb_pending);
758 } else {
759 atomic_dec(&card->tx_data_urb_pending);
760 if (card->tx_data_ix)
761 card->tx_data_ix--;
762 else
763 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
764 }
765
766 return -1;
767 } else {
768 if (ep == card->tx_data_ep &&
769 atomic_read(&card->tx_data_urb_pending) ==
770 MWIFIEX_TX_DATA_URB)
771 return -ENOSR;
772 }
773
774 return -EINPROGRESS;
775}
776
777/* This function register usb device and initialize parameter. */
778static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
779{
780 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
781
782 card->adapter = adapter;
783 adapter->dev = &card->udev->dev;
784 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
785
786 return 0;
787}
788
789/* This function reads one block of firmware data. */
790static int mwifiex_get_fw_data(struct mwifiex_adapter *adapter,
791 u32 offset, u32 len, u8 *buf)
792{
793 if (!buf || !len)
794 return -1;
795
796 if (offset + len > adapter->firmware->size)
797 return -1;
798
799 memcpy(buf, adapter->firmware->data + offset, len);
800
801 return 0;
802}
803
804static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
805 struct mwifiex_fw_image *fw)
806{
807 int ret = 0;
808 u8 *firmware = fw->fw_buf, *recv_buff;
809 u32 retries = USB8797_FW_MAX_RETRY, dlen;
810 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
811 struct fw_data *fwdata;
812 struct fw_sync_header sync_fw;
813 u8 check_winner = 1;
814
815 if (!firmware) {
816 dev_err(adapter->dev,
817 "No firmware image found! Terminating download\n");
818 ret = -1;
819 goto fw_exit;
820 }
821
822 /* Allocate memory for transmit */
823 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
824 if (!fwdata)
825 goto fw_exit;
826
827 /* Allocate memory for receive */
828 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
829 if (!recv_buff)
830 goto cleanup;
831
832 do {
833 /* Send pseudo data to check winner status first */
834 if (check_winner) {
835 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
836 dlen = 0;
837 } else {
838 /* copy the header of the fw_data to get the length */
839 if (firmware)
840 memcpy(&fwdata->fw_hdr, &firmware[tlen],
841 sizeof(struct fw_header));
842 else
843 mwifiex_get_fw_data(adapter, tlen,
844 sizeof(struct fw_header),
845 (u8 *)&fwdata->fw_hdr);
846
847 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
848 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
849 tlen += sizeof(struct fw_header);
850
851 if (firmware)
852 memcpy(fwdata->data, &firmware[tlen], dlen);
853 else
854 mwifiex_get_fw_data(adapter, tlen, dlen,
855 (u8 *)fwdata->data);
856
857 fwdata->seq_num = cpu_to_le32(fw_seqnum);
858 tlen += dlen;
859 }
860
861 /* If the send/receive fails or CRC occurs then retry */
862 while (retries--) {
863 u8 *buf = (u8 *)fwdata;
864 u32 len = FW_DATA_XMIT_SIZE;
865
866 /* send the firmware block */
867 ret = mwifiex_write_data_sync(adapter, buf, &len,
868 MWIFIEX_USB_EP_CMD_EVENT,
869 MWIFIEX_USB_TIMEOUT);
870 if (ret) {
871 dev_err(adapter->dev,
872 "write_data_sync: failed: %d\n", ret);
873 continue;
874 }
875
876 buf = recv_buff;
877 len = FW_DNLD_RX_BUF_SIZE;
878
879 /* Receive the firmware block response */
880 ret = mwifiex_read_data_sync(adapter, buf, &len,
881 MWIFIEX_USB_EP_CMD_EVENT,
882 MWIFIEX_USB_TIMEOUT);
883 if (ret) {
884 dev_err(adapter->dev,
885 "read_data_sync: failed: %d\n", ret);
886 continue;
887 }
888
889 memcpy(&sync_fw, recv_buff,
890 sizeof(struct fw_sync_header));
891
892 /* check 1st firmware block resp for highest bit set */
893 if (check_winner) {
894 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
895 dev_warn(adapter->dev,
896 "USB is not the winner %#x\n",
897 sync_fw.cmd);
898
899 /* returning success */
900 ret = 0;
901 goto cleanup;
902 }
903
904 dev_dbg(adapter->dev,
905 "USB is the winner, start to download FW\n");
906
907 check_winner = 0;
908 break;
909 }
910
911 /* check the firmware block response for CRC errors */
912 if (sync_fw.cmd) {
913 dev_err(adapter->dev,
914 "FW received block with CRC %#x\n",
915 sync_fw.cmd);
916 ret = -1;
917 continue;
918 }
919
920 retries = USB8797_FW_MAX_RETRY;
921 break;
922 }
923 fw_seqnum++;
924 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
925
926cleanup:
927 dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
928
929 kfree(recv_buff);
930 kfree(fwdata);
931
932 if (retries)
933 ret = 0;
934fw_exit:
935 return ret;
936}
937
938static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
939 struct mwifiex_fw_image *fw)
940{
941 int ret;
942 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
943
944 if (card->usb_boot_state == USB8797_FW_DNLD) {
945 ret = mwifiex_prog_fw_w_helper(adapter, fw);
946 if (ret)
947 return -1;
948
949 /* Boot state changes after successful firmware download */
950 if (card->usb_boot_state == USB8797_FW_DNLD)
951 return -1;
952 }
953
954 ret = mwifiex_usb_rx_init(adapter);
955 if (!ret)
956 ret = mwifiex_usb_tx_init(adapter);
957
958 return ret;
959}
960
961static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
962{
963 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
964
965 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
966 if ((ep == card->rx_cmd_ep) &&
967 (!atomic_read(&card->rx_cmd_urb_pending)))
968 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
969 MWIFIEX_RX_CMD_BUF_SIZE);
970
971 return;
972}
973
974static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
975 struct sk_buff *skb)
976{
977 atomic_dec(&adapter->rx_pending);
978 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
979
980 return 0;
981}
982
983static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter,
984 struct sk_buff *skb)
985{
986 atomic_dec(&adapter->rx_pending);
987 dev_kfree_skb_any(skb);
988
989 return 0;
990}
991
992/* This function wakes up the card. */
993static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
994{
995 /* Simulation of HS_AWAKE event */
996 adapter->pm_wakeup_fw_try = false;
997 adapter->pm_wakeup_card_req = false;
998 adapter->ps_state = PS_STATE_AWAKE;
999
1000 return 0;
1001}
1002
1003static struct mwifiex_if_ops usb_ops = {
1004 .register_dev = mwifiex_register_dev,
1005 .wakeup = mwifiex_pm_wakeup_card,
1006 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1007
1008 /* USB specific */
1009 .dnld_fw = mwifiex_usb_dnld_fw,
1010 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
1011 .event_complete = mwifiex_usb_cmd_event_complete,
1012 .data_complete = mwifiex_usb_data_complete,
1013 .host_to_card = mwifiex_usb_host_to_card,
1014};
1015
1016/* This function initializes the USB driver module.
1017 *
1018 * This initiates the semaphore and registers the device with
1019 * USB bus.
1020 */
1021static int mwifiex_usb_init_module(void)
1022{
1023 int ret;
1024
1025 pr_debug("Marvell USB8797 Driver\n");
1026
1027 sema_init(&add_remove_card_sem, 1);
1028
1029 ret = usb_register(&mwifiex_usb_driver);
1030 if (ret)
1031 pr_err("Driver register failed!\n");
1032 else
1033 pr_debug("info: Driver registered successfully!\n");
1034
1035 return ret;
1036}
1037
1038/* This function cleans up the USB driver.
1039 *
1040 * The following major steps are followed in .disconnect for cleanup:
1041 * - Resume the device if its suspended
1042 * - Disconnect the device if connected
1043 * - Shutdown the firmware
1044 * - Unregister the device from USB bus.
1045 */
1046static void mwifiex_usb_cleanup_module(void)
1047{
1048 if (!down_interruptible(&add_remove_card_sem))
1049 up(&add_remove_card_sem);
1050
1051 /* set the flag as user is removing this module */
1052 user_rmmod = 1;
1053
1054 usb_deregister(&mwifiex_usb_driver);
1055}
1056
1057module_init(mwifiex_usb_init_module);
1058module_exit(mwifiex_usb_cleanup_module);
1059
1060MODULE_AUTHOR("Marvell International Ltd.");
1061MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1062MODULE_VERSION(USB_VERSION);
1063MODULE_LICENSE("GPL v2");
1064MODULE_FIRMWARE("mrvl/usb8797_uapsta.bin");