Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

Linux/drivers/net/wireless/mwifiex/usb.c

  1 /*
  2  * Marvell Wireless LAN device driver: USB specific handling
  3  *
  4  * Copyright (C) 2012-2014, Marvell International Ltd.
  5  *
  6  * This software file (the "File") is distributed by Marvell International
  7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  8  * (the "License").  You may use, redistribute and/or modify this File in
  9  * accordance with the terms and conditions of the License, a copy of which
 10  * is available by writing to the Free Software Foundation, Inc.,
 11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 13  *
 14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 17  * this warranty disclaimer.
 18  */
 19 
 20 #include "main.h"
 21 #include "usb.h"
 22 
 23 #define USB_VERSION     "1.0"
 24 
 25 static u8 user_rmmod;
 26 static struct mwifiex_if_ops usb_ops;
 27 static struct semaphore add_remove_card_sem;
 28 
 29 static struct usb_device_id mwifiex_usb_table[] = {
 30         /* 8766 */
 31         {USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
 32         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
 33                                        USB_CLASS_VENDOR_SPEC,
 34                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
 35         /* 8797 */
 36         {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
 37         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
 38                                        USB_CLASS_VENDOR_SPEC,
 39                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
 40         /* 8801 */
 41         {USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
 42         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
 43                                        USB_CLASS_VENDOR_SPEC,
 44                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
 45         /* 8997 */
 46         {USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
 47         {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_PID_2,
 48                                        USB_CLASS_VENDOR_SPEC,
 49                                        USB_SUBCLASS_VENDOR_SPEC, 0xff)},
 50         { }     /* Terminating entry */
 51 };
 52 
 53 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
 54 
 55 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
 56 
 57 /* This function handles received packet. Necessary action is taken based on
 58  * cmd/event/data.
 59  */
 60 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
 61                             struct sk_buff *skb, u8 ep)
 62 {
 63         u32 recv_type;
 64         __le32 tmp;
 65         int ret;
 66 
 67         if (adapter->hs_activated)
 68                 mwifiex_process_hs_config(adapter);
 69 
 70         if (skb->len < INTF_HEADER_LEN) {
 71                 mwifiex_dbg(adapter, ERROR,
 72                             "%s: invalid skb->len\n", __func__);
 73                 return -1;
 74         }
 75 
 76         switch (ep) {
 77         case MWIFIEX_USB_EP_CMD_EVENT:
 78                 mwifiex_dbg(adapter, EVENT,
 79                             "%s: EP_CMD_EVENT\n", __func__);
 80                 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
 81                 recv_type = le32_to_cpu(tmp);
 82                 skb_pull(skb, INTF_HEADER_LEN);
 83 
 84                 switch (recv_type) {
 85                 case MWIFIEX_USB_TYPE_CMD:
 86                         if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
 87                                 mwifiex_dbg(adapter, ERROR,
 88                                             "CMD: skb->len too large\n");
 89                                 ret = -1;
 90                                 goto exit_restore_skb;
 91                         } else if (!adapter->curr_cmd) {
 92                                 mwifiex_dbg(adapter, WARN, "CMD: no curr_cmd\n");
 93                                 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
 94                                         mwifiex_process_sleep_confirm_resp(
 95                                                         adapter, skb->data,
 96                                                         skb->len);
 97                                         ret = 0;
 98                                         goto exit_restore_skb;
 99                                 }
100                                 ret = -1;
101                                 goto exit_restore_skb;
102                         }
103 
104                         adapter->curr_cmd->resp_skb = skb;
105                         adapter->cmd_resp_received = true;
106                         break;
107                 case MWIFIEX_USB_TYPE_EVENT:
108                         if (skb->len < sizeof(u32)) {
109                                 mwifiex_dbg(adapter, ERROR,
110                                             "EVENT: skb->len too small\n");
111                                 ret = -1;
112                                 goto exit_restore_skb;
113                         }
114                         skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
115                         adapter->event_cause = le32_to_cpu(tmp);
116                         mwifiex_dbg(adapter, EVENT,
117                                     "event_cause %#x\n", adapter->event_cause);
118 
119                         if (skb->len > MAX_EVENT_SIZE) {
120                                 mwifiex_dbg(adapter, ERROR,
121                                             "EVENT: event body too large\n");
122                                 ret = -1;
123                                 goto exit_restore_skb;
124                         }
125 
126                         memcpy(adapter->event_body, skb->data +
127                                MWIFIEX_EVENT_HEADER_LEN, skb->len);
128 
129                         adapter->event_received = true;
130                         adapter->event_skb = skb;
131                         break;
132                 default:
133                         mwifiex_dbg(adapter, ERROR,
134                                     "unknown recv_type %#x\n", recv_type);
135                         return -1;
136                 }
137                 break;
138         case MWIFIEX_USB_EP_DATA:
139                 mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
140                 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
141                         mwifiex_dbg(adapter, ERROR,
142                                     "DATA: skb->len too large\n");
143                         return -1;
144                 }
145 
146                 skb_queue_tail(&adapter->rx_data_q, skb);
147                 adapter->data_received = true;
148                 atomic_inc(&adapter->rx_pending);
149                 break;
150         default:
151                 mwifiex_dbg(adapter, ERROR,
152                             "%s: unknown endport %#x\n", __func__, ep);
153                 return -1;
154         }
155 
156         return -EINPROGRESS;
157 
158 exit_restore_skb:
159         /* The buffer will be reused for further cmds/events */
160         skb_push(skb, INTF_HEADER_LEN);
161 
162         return ret;
163 }
164 
165 static void mwifiex_usb_rx_complete(struct urb *urb)
166 {
167         struct urb_context *context = (struct urb_context *)urb->context;
168         struct mwifiex_adapter *adapter = context->adapter;
169         struct sk_buff *skb = context->skb;
170         struct usb_card_rec *card;
171         int recv_length = urb->actual_length;
172         int size, status;
173 
174         if (!adapter || !adapter->card) {
175                 pr_err("mwifiex adapter or card structure is not valid\n");
176                 return;
177         }
178 
179         card = (struct usb_card_rec *)adapter->card;
180         if (card->rx_cmd_ep == context->ep)
181                 atomic_dec(&card->rx_cmd_urb_pending);
182         else
183                 atomic_dec(&card->rx_data_urb_pending);
184 
185         if (recv_length) {
186                 if (urb->status || (adapter->surprise_removed)) {
187                         mwifiex_dbg(adapter, ERROR,
188                                     "URB status is failed: %d\n", urb->status);
189                         /* Do not free skb in case of command ep */
190                         if (card->rx_cmd_ep != context->ep)
191                                 dev_kfree_skb_any(skb);
192                         goto setup_for_next;
193                 }
194                 if (skb->len > recv_length)
195                         skb_trim(skb, recv_length);
196                 else
197                         skb_put(skb, recv_length - skb->len);
198 
199                 status = mwifiex_usb_recv(adapter, skb, context->ep);
200 
201                 mwifiex_dbg(adapter, INFO,
202                             "info: recv_length=%d, status=%d\n",
203                             recv_length, status);
204                 if (status == -EINPROGRESS) {
205                         mwifiex_queue_main_work(adapter);
206 
207                         /* urb for data_ep is re-submitted now;
208                          * urb for cmd_ep will be re-submitted in callback
209                          * mwifiex_usb_recv_complete
210                          */
211                         if (card->rx_cmd_ep == context->ep)
212                                 return;
213                 } else {
214                         if (status == -1)
215                                 mwifiex_dbg(adapter, ERROR,
216                                             "received data processing failed!\n");
217 
218                         /* Do not free skb in case of command ep */
219                         if (card->rx_cmd_ep != context->ep)
220                                 dev_kfree_skb_any(skb);
221                 }
222         } else if (urb->status) {
223                 if (!adapter->is_suspended) {
224                         mwifiex_dbg(adapter, FATAL,
225                                     "Card is removed: %d\n", urb->status);
226                         adapter->surprise_removed = true;
227                 }
228                 dev_kfree_skb_any(skb);
229                 return;
230         } else {
231                 /* Do not free skb in case of command ep */
232                 if (card->rx_cmd_ep != context->ep)
233                         dev_kfree_skb_any(skb);
234 
235                 /* fall through setup_for_next */
236         }
237 
238 setup_for_next:
239         if (card->rx_cmd_ep == context->ep)
240                 size = MWIFIEX_RX_CMD_BUF_SIZE;
241         else
242                 size = MWIFIEX_RX_DATA_BUF_SIZE;
243 
244         if (card->rx_cmd_ep == context->ep) {
245                 mwifiex_usb_submit_rx_urb(context, size);
246         } else {
247                 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING){
248                         mwifiex_usb_submit_rx_urb(context, size);
249                 }else{
250                         context->skb = NULL;
251                 }
252         }
253 
254         return;
255 }
256 
257 static void mwifiex_usb_tx_complete(struct urb *urb)
258 {
259         struct urb_context *context = (struct urb_context *)(urb->context);
260         struct mwifiex_adapter *adapter = context->adapter;
261         struct usb_card_rec *card = adapter->card;
262         struct usb_tx_data_port *port;
263         int i;
264 
265         mwifiex_dbg(adapter, INFO,
266                     "%s: status: %d\n", __func__, urb->status);
267 
268         if (context->ep == card->tx_cmd_ep) {
269                 mwifiex_dbg(adapter, CMD,
270                             "%s: CMD\n", __func__);
271                 atomic_dec(&card->tx_cmd_urb_pending);
272                 adapter->cmd_sent = false;
273         } else {
274                 mwifiex_dbg(adapter, DATA,
275                             "%s: DATA\n", __func__);
276                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
277                         port = &card->port[i];
278                         if (context->ep == port->tx_data_ep) {
279                                 atomic_dec(&port->tx_data_urb_pending);
280                                 port->block_status = false;
281                                 break;
282                         }
283                 }
284                 adapter->data_sent = false;
285                 mwifiex_write_data_complete(adapter, context->skb, 0,
286                                             urb->status ? -1 : 0);
287         }
288 
289         if (card->mc_resync_flag)
290                 mwifiex_multi_chan_resync(adapter);
291 
292         mwifiex_queue_main_work(adapter);
293 
294         return;
295 }
296 
297 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
298 {
299         struct mwifiex_adapter *adapter = ctx->adapter;
300         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
301 
302         if (card->rx_cmd_ep != ctx->ep) {
303                 ctx->skb = dev_alloc_skb(size);
304                 if (!ctx->skb) {
305                         mwifiex_dbg(adapter, ERROR,
306                                     "%s: dev_alloc_skb failed\n", __func__);
307                         return -ENOMEM;
308                 }
309         }
310 
311         usb_fill_bulk_urb(ctx->urb, card->udev,
312                           usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
313                           size, mwifiex_usb_rx_complete, (void *)ctx);
314 
315         if (card->rx_cmd_ep == ctx->ep)
316                 atomic_inc(&card->rx_cmd_urb_pending);
317         else
318                 atomic_inc(&card->rx_data_urb_pending);
319 
320         if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
321                 mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
322                 dev_kfree_skb_any(ctx->skb);
323                 ctx->skb = NULL;
324 
325                 if (card->rx_cmd_ep == ctx->ep)
326                         atomic_dec(&card->rx_cmd_urb_pending);
327                 else
328                         atomic_dec(&card->rx_data_urb_pending);
329 
330                 return -1;
331         }
332 
333         return 0;
334 }
335 
336 static void mwifiex_usb_free(struct usb_card_rec *card)
337 {
338         struct usb_tx_data_port *port;
339         int i, j;
340 
341         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
342                 usb_kill_urb(card->rx_cmd.urb);
343 
344         usb_free_urb(card->rx_cmd.urb);
345         card->rx_cmd.urb = NULL;
346 
347         if (atomic_read(&card->rx_data_urb_pending))
348                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
349                         if (card->rx_data_list[i].urb)
350                                 usb_kill_urb(card->rx_data_list[i].urb);
351 
352         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
353                 usb_free_urb(card->rx_data_list[i].urb);
354                 card->rx_data_list[i].urb = NULL;
355         }
356 
357         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
358                 port = &card->port[i];
359                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
360                         usb_free_urb(port->tx_data_list[j].urb);
361                         port->tx_data_list[j].urb = NULL;
362                 }
363         }
364 
365         usb_free_urb(card->tx_cmd.urb);
366         card->tx_cmd.urb = NULL;
367 
368         return;
369 }
370 
371 /* This function probes an mwifiex device and registers it. It allocates
372  * the card structure, initiates the device registration and initialization
373  * procedure by adding a logical interface.
374  */
375 static int mwifiex_usb_probe(struct usb_interface *intf,
376                              const struct usb_device_id *id)
377 {
378         struct usb_device *udev = interface_to_usbdev(intf);
379         struct usb_host_interface *iface_desc = intf->cur_altsetting;
380         struct usb_endpoint_descriptor *epd;
381         int ret, i;
382         struct usb_card_rec *card;
383         u16 id_vendor, id_product, bcd_device, bcd_usb;
384 
385         card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
386         if (!card)
387                 return -ENOMEM;
388 
389         id_vendor = le16_to_cpu(udev->descriptor.idVendor);
390         id_product = le16_to_cpu(udev->descriptor.idProduct);
391         bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
392         bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
393         pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
394                  id_vendor, id_product, bcd_device);
395 
396         /* PID_1 is used for firmware downloading only */
397         switch (id_product) {
398         case USB8766_PID_1:
399         case USB8797_PID_1:
400         case USB8801_PID_1:
401         case USB8997_PID_1:
402                 card->usb_boot_state = USB8XXX_FW_DNLD;
403                 break;
404         case USB8766_PID_2:
405         case USB8797_PID_2:
406         case USB8801_PID_2:
407         case USB8997_PID_2:
408                 card->usb_boot_state = USB8XXX_FW_READY;
409                 break;
410         default:
411                 pr_warn("unknown id_product %#x\n", id_product);
412                 card->usb_boot_state = USB8XXX_FW_DNLD;
413                 break;
414         }
415 
416         card->udev = udev;
417         card->intf = intf;
418 
419         pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
420                  udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
421                  udev->descriptor.bDeviceSubClass,
422                  udev->descriptor.bDeviceProtocol);
423 
424         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
425                 epd = &iface_desc->endpoint[i].desc;
426                 if (usb_endpoint_dir_in(epd) &&
427                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
428                     usb_endpoint_xfer_bulk(epd)) {
429                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
430                                  le16_to_cpu(epd->wMaxPacketSize),
431                                  epd->bEndpointAddress);
432                         card->rx_cmd_ep = usb_endpoint_num(epd);
433                         atomic_set(&card->rx_cmd_urb_pending, 0);
434                 }
435                 if (usb_endpoint_dir_in(epd) &&
436                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
437                     usb_endpoint_xfer_bulk(epd)) {
438                         pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
439                                  le16_to_cpu(epd->wMaxPacketSize),
440                                  epd->bEndpointAddress);
441                         card->rx_data_ep = usb_endpoint_num(epd);
442                         atomic_set(&card->rx_data_urb_pending, 0);
443                 }
444                 if (usb_endpoint_dir_out(epd) &&
445                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
446                     usb_endpoint_xfer_bulk(epd)) {
447                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
448                                  le16_to_cpu(epd->wMaxPacketSize),
449                                  epd->bEndpointAddress);
450                         card->port[0].tx_data_ep = usb_endpoint_num(epd);
451                         atomic_set(&card->port[0].tx_data_urb_pending, 0);
452                 }
453                 if (usb_endpoint_dir_out(epd) &&
454                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA_CH2 &&
455                     usb_endpoint_xfer_bulk(epd)) {
456                         pr_debug("info: bulk OUT chan2:\t"
457                                  "max pkt size: %d, addr: %d\n",
458                                  le16_to_cpu(epd->wMaxPacketSize),
459                                  epd->bEndpointAddress);
460                         card->port[1].tx_data_ep = usb_endpoint_num(epd);
461                         atomic_set(&card->port[1].tx_data_urb_pending, 0);
462                 }
463                 if (usb_endpoint_dir_out(epd) &&
464                     usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
465                     usb_endpoint_xfer_bulk(epd)) {
466                         pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
467                                  le16_to_cpu(epd->wMaxPacketSize),
468                                  epd->bEndpointAddress);
469                         card->tx_cmd_ep = usb_endpoint_num(epd);
470                         atomic_set(&card->tx_cmd_urb_pending, 0);
471                         card->bulk_out_maxpktsize =
472                                         le16_to_cpu(epd->wMaxPacketSize);
473                 }
474         }
475 
476         usb_set_intfdata(intf, card);
477 
478         ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
479                                MWIFIEX_USB);
480         if (ret) {
481                 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
482                 usb_reset_device(udev);
483                 kfree(card);
484                 return ret;
485         }
486 
487         usb_get_dev(udev);
488 
489         return 0;
490 }
491 
492 /* Kernel needs to suspend all functions separately. Therefore all
493  * registered functions must have drivers with suspend and resume
494  * methods. Failing that the kernel simply removes the whole card.
495  *
496  * If already not suspended, this function allocates and sends a
497  * 'host sleep activate' request to the firmware and turns off the traffic.
498  */
499 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
500 {
501         struct usb_card_rec *card = usb_get_intfdata(intf);
502         struct mwifiex_adapter *adapter;
503         struct usb_tx_data_port *port;
504         int i, j;
505 
506         if (!card || !card->adapter) {
507                 pr_err("%s: card or card->adapter is NULL\n", __func__);
508                 return 0;
509         }
510         adapter = card->adapter;
511 
512         if (unlikely(adapter->is_suspended))
513                 mwifiex_dbg(adapter, WARN,
514                             "Device already suspended\n");
515 
516         mwifiex_enable_hs(adapter);
517 
518         /* 'is_suspended' flag indicates device is suspended.
519          * It must be set here before the usb_kill_urb() calls. Reason
520          * is in the complete handlers, urb->status(= -ENOENT) and
521          * this flag is used in combination to distinguish between a
522          * 'suspended' state and a 'disconnect' one.
523          */
524         adapter->is_suspended = true;
525         adapter->hs_enabling = false;
526 
527         if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
528                 usb_kill_urb(card->rx_cmd.urb);
529 
530         if (atomic_read(&card->rx_data_urb_pending))
531                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
532                         if (card->rx_data_list[i].urb)
533                                 usb_kill_urb(card->rx_data_list[i].urb);
534 
535         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
536                 port = &card->port[i];
537                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
538                         if (port->tx_data_list[j].urb)
539                                 usb_kill_urb(port->tx_data_list[j].urb);
540                 }
541         }
542 
543         if (card->tx_cmd.urb)
544                 usb_kill_urb(card->tx_cmd.urb);
545 
546         return 0;
547 }
548 
549 /* Kernel needs to suspend all functions separately. Therefore all
550  * registered functions must have drivers with suspend and resume
551  * methods. Failing that the kernel simply removes the whole card.
552  *
553  * If already not resumed, this function turns on the traffic and
554  * sends a 'host sleep cancel' request to the firmware.
555  */
556 static int mwifiex_usb_resume(struct usb_interface *intf)
557 {
558         struct usb_card_rec *card = usb_get_intfdata(intf);
559         struct mwifiex_adapter *adapter;
560         int i;
561 
562         if (!card || !card->adapter) {
563                 pr_err("%s: card or card->adapter is NULL\n", __func__);
564                 return 0;
565         }
566         adapter = card->adapter;
567 
568         if (unlikely(!adapter->is_suspended)) {
569                 mwifiex_dbg(adapter, WARN,
570                             "Device already resumed\n");
571                 return 0;
572         }
573 
574         /* Indicate device resumed. The netdev queue will be resumed only
575          * after the urbs have been re-submitted
576          */
577         adapter->is_suspended = false;
578 
579         if (!atomic_read(&card->rx_data_urb_pending))
580                 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
581                         mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
582                                                   MWIFIEX_RX_DATA_BUF_SIZE);
583 
584         if (!atomic_read(&card->rx_cmd_urb_pending)) {
585                 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
586                 if (card->rx_cmd.skb)
587                         mwifiex_usb_submit_rx_urb(&card->rx_cmd,
588                                                   MWIFIEX_RX_CMD_BUF_SIZE);
589         }
590 
591         /* Disable Host Sleep */
592         if (adapter->hs_activated)
593                 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
594                                                    MWIFIEX_BSS_ROLE_ANY),
595                                   MWIFIEX_ASYNC_CMD);
596 
597         return 0;
598 }
599 
600 static void mwifiex_usb_disconnect(struct usb_interface *intf)
601 {
602         struct usb_card_rec *card = usb_get_intfdata(intf);
603         struct mwifiex_adapter *adapter;
604 
605         if (!card || !card->adapter) {
606                 pr_err("%s: card or card->adapter is NULL\n", __func__);
607                 return;
608         }
609 
610         adapter = card->adapter;
611         if (!adapter->priv_num)
612                 return;
613 
614         if (user_rmmod) {
615 #ifdef CONFIG_PM
616                 if (adapter->is_suspended)
617                         mwifiex_usb_resume(intf);
618 #endif
619 
620                 mwifiex_deauthenticate_all(adapter);
621 
622                 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
623                                                           MWIFIEX_BSS_ROLE_ANY),
624                                          MWIFIEX_FUNC_SHUTDOWN);
625         }
626 
627         mwifiex_usb_free(card);
628 
629         mwifiex_dbg(adapter, FATAL,
630                     "%s: removing card\n", __func__);
631         mwifiex_remove_card(adapter, &add_remove_card_sem);
632 
633         usb_set_intfdata(intf, NULL);
634         usb_put_dev(interface_to_usbdev(intf));
635         kfree(card);
636 
637         return;
638 }
639 
640 static struct usb_driver mwifiex_usb_driver = {
641         .name = "mwifiex_usb",
642         .probe = mwifiex_usb_probe,
643         .disconnect = mwifiex_usb_disconnect,
644         .id_table = mwifiex_usb_table,
645         .suspend = mwifiex_usb_suspend,
646         .resume = mwifiex_usb_resume,
647         .soft_unbind = 1,
648 };
649 
650 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
651 {
652         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
653         struct usb_tx_data_port *port;
654         int i, j;
655 
656         card->tx_cmd.adapter = adapter;
657         card->tx_cmd.ep = card->tx_cmd_ep;
658 
659         card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
660         if (!card->tx_cmd.urb) {
661                 mwifiex_dbg(adapter, ERROR,
662                             "tx_cmd.urb allocation failed\n");
663                 return -ENOMEM;
664         }
665 
666         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
667                 port = &card->port[i];
668                 if (!port->tx_data_ep)
669                         continue;
670                 port->tx_data_ix = 0;
671                 if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
672                         port->block_status = false;
673                 else
674                         port->block_status = true;
675                 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
676                         port->tx_data_list[j].adapter = adapter;
677                         port->tx_data_list[j].ep = port->tx_data_ep;
678                         port->tx_data_list[j].urb =
679                                         usb_alloc_urb(0, GFP_KERNEL);
680                         if (!port->tx_data_list[j].urb) {
681                                 mwifiex_dbg(adapter, ERROR,
682                                             "urb allocation failed\n");
683                                 return -ENOMEM;
684                         }
685                 }
686         }
687 
688         return 0;
689 }
690 
691 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
692 {
693         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
694         int i;
695 
696         card->rx_cmd.adapter = adapter;
697         card->rx_cmd.ep = card->rx_cmd_ep;
698 
699         card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
700         if (!card->rx_cmd.urb) {
701                 mwifiex_dbg(adapter, ERROR, "rx_cmd.urb allocation failed\n");
702                 return -ENOMEM;
703         }
704 
705         card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
706         if (!card->rx_cmd.skb)
707                 return -ENOMEM;
708 
709         if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
710                 return -1;
711 
712         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
713                 card->rx_data_list[i].adapter = adapter;
714                 card->rx_data_list[i].ep = card->rx_data_ep;
715 
716                 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
717                 if (!card->rx_data_list[i].urb) {
718                         mwifiex_dbg(adapter, ERROR,
719                                     "rx_data_list[] urb allocation failed\n");
720                         return -1;
721                 }
722                 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
723                                               MWIFIEX_RX_DATA_BUF_SIZE))
724                         return -1;
725         }
726 
727         return 0;
728 }
729 
730 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
731                                    u32 *len, u8 ep, u32 timeout)
732 {
733         struct usb_card_rec *card = adapter->card;
734         int actual_length, ret;
735 
736         if (!(*len % card->bulk_out_maxpktsize))
737                 (*len)++;
738 
739         /* Send the data block */
740         ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
741                            *len, &actual_length, timeout);
742         if (ret) {
743                 mwifiex_dbg(adapter, ERROR,
744                             "usb_bulk_msg for tx failed: %d\n", ret);
745                 return ret;
746         }
747 
748         *len = actual_length;
749 
750         return ret;
751 }
752 
753 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
754                                   u32 *len, u8 ep, u32 timeout)
755 {
756         struct usb_card_rec *card = adapter->card;
757         int actual_length, ret;
758 
759         /* Receive the data response */
760         ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
761                            *len, &actual_length, timeout);
762         if (ret) {
763                 mwifiex_dbg(adapter, ERROR,
764                             "usb_bulk_msg for rx failed: %d\n", ret);
765                 return ret;
766         }
767 
768         *len = actual_length;
769 
770         return ret;
771 }
772 
773 static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
774 {
775         struct usb_card_rec *card = adapter->card;
776         u8 active_port = MWIFIEX_USB_EP_DATA;
777         struct mwifiex_private *priv = NULL;
778         int i;
779 
780         if (adapter->usb_mc_status) {
781                 for (i = 0; i < adapter->priv_num; i++) {
782                         priv = adapter->priv[i];
783                         if (!priv)
784                                 continue;
785                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
786                              !priv->bss_started) ||
787                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
788                              !priv->media_connected))
789                                 priv->usb_port = MWIFIEX_USB_EP_DATA;
790                 }
791                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
792                         card->port[i].block_status = false;
793         } else {
794                 for (i = 0; i < adapter->priv_num; i++) {
795                         priv = adapter->priv[i];
796                         if (!priv)
797                                 continue;
798                         if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
799                              priv->bss_started) ||
800                             (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
801                              priv->media_connected)) {
802                                 active_port = priv->usb_port;
803                                 break;
804                         }
805                 }
806                 for (i = 0; i < adapter->priv_num; i++) {
807                         priv = adapter->priv[i];
808                         if (priv)
809                                 priv->usb_port = active_port;
810                 }
811                 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
812                         if (active_port == card->port[i].tx_data_ep)
813                                 card->port[i].block_status = false;
814                         else
815                                 card->port[i].block_status = true;
816                 }
817         }
818 }
819 
820 static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
821 {
822         struct usb_card_rec *card = priv->adapter->card;
823         int idx;
824 
825         for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
826                 if (priv->usb_port == card->port[idx].tx_data_ep)
827                         return !card->port[idx].block_status;
828         }
829 
830         return false;
831 }
832 
833 static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
834 {
835         struct usb_card_rec *card = adapter->card;
836         int i;
837 
838         for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
839                 if (!card->port[i].block_status)
840                         return false;
841 
842         return true;
843 }
844 
845 /* This function write a command/data packet to card. */
846 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
847                                     struct sk_buff *skb,
848                                     struct mwifiex_tx_param *tx_param)
849 {
850         struct usb_card_rec *card = adapter->card;
851         struct urb_context *context = NULL;
852         struct usb_tx_data_port *port = NULL;
853         u8 *data = (u8 *)skb->data;
854         struct urb *tx_urb;
855         int idx, ret;
856 
857         if (adapter->is_suspended) {
858                 mwifiex_dbg(adapter, ERROR,
859                             "%s: not allowed while suspended\n", __func__);
860                 return -1;
861         }
862 
863         if (adapter->surprise_removed) {
864                 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
865                 return -1;
866         }
867 
868         mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
869 
870         if (ep == card->tx_cmd_ep) {
871                 context = &card->tx_cmd;
872         } else {
873                 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
874                         if (ep == card->port[idx].tx_data_ep) {
875                                 port = &card->port[idx];
876                                 if (atomic_read(&port->tx_data_urb_pending)
877                                     >= MWIFIEX_TX_DATA_URB) {
878                                         port->block_status = true;
879                                         ret = -EBUSY;
880                                         goto done;
881                                 }
882                                 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
883                                         port->tx_data_ix = 0;
884                                 context =
885                                         &port->tx_data_list[port->tx_data_ix++];
886                                 break;
887                         }
888                 }
889                 if (!port) {
890                         mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
891                         return -1;
892                 }
893         }
894 
895         context->adapter = adapter;
896         context->ep = ep;
897         context->skb = skb;
898         tx_urb = context->urb;
899 
900         usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
901                           data, skb->len, mwifiex_usb_tx_complete,
902                           (void *)context);
903 
904         tx_urb->transfer_flags |= URB_ZERO_PACKET;
905 
906         if (ep == card->tx_cmd_ep)
907                 atomic_inc(&card->tx_cmd_urb_pending);
908         else
909                 atomic_inc(&port->tx_data_urb_pending);
910 
911         if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
912                 mwifiex_dbg(adapter, ERROR,
913                             "%s: usb_submit_urb failed\n", __func__);
914                 if (ep == card->tx_cmd_ep) {
915                         atomic_dec(&card->tx_cmd_urb_pending);
916                 } else {
917                         atomic_dec(&port->tx_data_urb_pending);
918                         port->block_status = false;
919                         if (port->tx_data_ix)
920                                 port->tx_data_ix--;
921                         else
922                                 port->tx_data_ix = MWIFIEX_TX_DATA_URB;
923                 }
924 
925                 return -1;
926         } else {
927                 if (ep != card->tx_cmd_ep &&
928                     atomic_read(&port->tx_data_urb_pending) ==
929                                                         MWIFIEX_TX_DATA_URB) {
930                         port->block_status = true;
931                         ret = -ENOSR;
932                         goto done;
933                 }
934         }
935 
936         return -EINPROGRESS;
937 
938 done:
939         if (ep != card->tx_cmd_ep)
940                 adapter->data_sent = mwifiex_usb_data_sent(adapter);
941 
942         return ret;
943 }
944 
945 /* This function register usb device and initialize parameter. */
946 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
947 {
948         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
949 
950         card->adapter = adapter;
951         adapter->dev = &card->udev->dev;
952 
953         switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
954         case USB8997_PID_1:
955         case USB8997_PID_2:
956                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
957                 strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
958                 adapter->ext_scan = true;
959                 break;
960         case USB8766_PID_1:
961         case USB8766_PID_2:
962                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
963                 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
964                 adapter->ext_scan = true;
965                 break;
966         case USB8801_PID_1:
967         case USB8801_PID_2:
968                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
969                 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
970                 adapter->ext_scan = false;
971                 break;
972         case USB8797_PID_1:
973         case USB8797_PID_2:
974         default:
975                 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
976                 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
977                 break;
978         }
979 
980         adapter->usb_mc_status = false;
981         adapter->usb_mc_setup = false;
982 
983         return 0;
984 }
985 
986 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
987 {
988         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
989 
990         card->adapter = NULL;
991 }
992 
993 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
994                                     struct mwifiex_fw_image *fw)
995 {
996         int ret = 0;
997         u8 *firmware = fw->fw_buf, *recv_buff;
998         u32 retries = USB8XXX_FW_MAX_RETRY, dlen;
999         u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
1000         struct fw_data *fwdata;
1001         struct fw_sync_header sync_fw;
1002         u8 check_winner = 1;
1003 
1004         if (!firmware) {
1005                 mwifiex_dbg(adapter, ERROR,
1006                             "No firmware image found! Terminating download\n");
1007                 ret = -1;
1008                 goto fw_exit;
1009         }
1010 
1011         /* Allocate memory for transmit */
1012         fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
1013         if (!fwdata) {
1014                 ret = -ENOMEM;
1015                 goto fw_exit;
1016         }
1017 
1018         /* Allocate memory for receive */
1019         recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1020         if (!recv_buff)
1021                 goto cleanup;
1022 
1023         do {
1024                 /* Send pseudo data to check winner status first */
1025                 if (check_winner) {
1026                         memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1027                         dlen = 0;
1028                 } else {
1029                         /* copy the header of the fw_data to get the length */
1030                         memcpy(&fwdata->fw_hdr, &firmware[tlen],
1031                                sizeof(struct fw_header));
1032 
1033                         dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1034                         dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1035                         tlen += sizeof(struct fw_header);
1036 
1037                         memcpy(fwdata->data, &firmware[tlen], dlen);
1038 
1039                         fwdata->seq_num = cpu_to_le32(fw_seqnum);
1040                         tlen += dlen;
1041                 }
1042 
1043                 /* If the send/receive fails or CRC occurs then retry */
1044                 while (retries--) {
1045                         u8 *buf = (u8 *)fwdata;
1046                         u32 len = FW_DATA_XMIT_SIZE;
1047 
1048                         /* send the firmware block */
1049                         ret = mwifiex_write_data_sync(adapter, buf, &len,
1050                                                 MWIFIEX_USB_EP_CMD_EVENT,
1051                                                 MWIFIEX_USB_TIMEOUT);
1052                         if (ret) {
1053                                 mwifiex_dbg(adapter, ERROR,
1054                                             "write_data_sync: failed: %d\n",
1055                                             ret);
1056                                 continue;
1057                         }
1058 
1059                         buf = recv_buff;
1060                         len = FW_DNLD_RX_BUF_SIZE;
1061 
1062                         /* Receive the firmware block response */
1063                         ret = mwifiex_read_data_sync(adapter, buf, &len,
1064                                                 MWIFIEX_USB_EP_CMD_EVENT,
1065                                                 MWIFIEX_USB_TIMEOUT);
1066                         if (ret) {
1067                                 mwifiex_dbg(adapter, ERROR,
1068                                             "read_data_sync: failed: %d\n",
1069                                             ret);
1070                                 continue;
1071                         }
1072 
1073                         memcpy(&sync_fw, recv_buff,
1074                                sizeof(struct fw_sync_header));
1075 
1076                         /* check 1st firmware block resp for highest bit set */
1077                         if (check_winner) {
1078                                 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1079                                         mwifiex_dbg(adapter, WARN,
1080                                                     "USB is not the winner %#x\n",
1081                                                     sync_fw.cmd);
1082 
1083                                         /* returning success */
1084                                         ret = 0;
1085                                         goto cleanup;
1086                                 }
1087 
1088                                 mwifiex_dbg(adapter, MSG,
1089                                             "start to download FW...\n");
1090 
1091                                 check_winner = 0;
1092                                 break;
1093                         }
1094 
1095                         /* check the firmware block response for CRC errors */
1096                         if (sync_fw.cmd) {
1097                                 mwifiex_dbg(adapter, ERROR,
1098                                             "FW received block with CRC %#x\n",
1099                                             sync_fw.cmd);
1100                                 ret = -1;
1101                                 continue;
1102                         }
1103 
1104                         retries = USB8XXX_FW_MAX_RETRY;
1105                         break;
1106                 }
1107                 fw_seqnum++;
1108         } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1109 
1110 cleanup:
1111         mwifiex_dbg(adapter, MSG,
1112                     "info: FW download over, size %d bytes\n", tlen);
1113 
1114         kfree(recv_buff);
1115         kfree(fwdata);
1116 
1117         if (retries)
1118                 ret = 0;
1119 fw_exit:
1120         return ret;
1121 }
1122 
1123 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1124                         struct mwifiex_fw_image *fw)
1125 {
1126         int ret;
1127         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1128 
1129         if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1130                 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1131                 if (ret)
1132                         return -1;
1133 
1134                 /* Boot state changes after successful firmware download */
1135                 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1136                         return -1;
1137         }
1138 
1139         ret = mwifiex_usb_rx_init(adapter);
1140         if (!ret)
1141                 ret = mwifiex_usb_tx_init(adapter);
1142 
1143         return ret;
1144 }
1145 
1146 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1147 {
1148         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1149 
1150         skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1151         if ((ep == card->rx_cmd_ep) &&
1152             (!atomic_read(&card->rx_cmd_urb_pending)))
1153                 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1154                                           MWIFIEX_RX_CMD_BUF_SIZE);
1155 
1156         return;
1157 }
1158 
1159 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1160                                        struct sk_buff *skb)
1161 {
1162         mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1163 
1164         return 0;
1165 }
1166 
1167 /* This function wakes up the card. */
1168 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1169 {
1170         /* Simulation of HS_AWAKE event */
1171         adapter->pm_wakeup_fw_try = false;
1172         del_timer(&adapter->wakeup_timer);
1173         adapter->pm_wakeup_card_req = false;
1174         adapter->ps_state = PS_STATE_AWAKE;
1175 
1176         return 0;
1177 }
1178 
1179 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1180 {
1181         struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1182         int i;
1183         struct urb_context *ctx;
1184 
1185         for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1186                 if (card->rx_data_list[i].skb)
1187                         continue;
1188                 ctx = &card->rx_data_list[i];
1189                 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1190         }
1191 }
1192 
1193 /* This function is called after the card has woken up. */
1194 static inline int
1195 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1196 {
1197         return 0;
1198 }
1199 
1200 static struct mwifiex_if_ops usb_ops = {
1201         .register_dev =         mwifiex_register_dev,
1202         .unregister_dev =       mwifiex_unregister_dev,
1203         .wakeup =               mwifiex_pm_wakeup_card,
1204         .wakeup_complete =      mwifiex_pm_wakeup_card_complete,
1205 
1206         /* USB specific */
1207         .dnld_fw =              mwifiex_usb_dnld_fw,
1208         .cmdrsp_complete =      mwifiex_usb_cmd_event_complete,
1209         .event_complete =       mwifiex_usb_cmd_event_complete,
1210         .host_to_card =         mwifiex_usb_host_to_card,
1211         .submit_rem_rx_urbs =   mwifiex_usb_submit_rem_rx_urbs,
1212         .multi_port_resync =    mwifiex_usb_port_resync,
1213         .is_port_ready =        mwifiex_usb_is_port_ready,
1214 };
1215 
1216 /* This function initializes the USB driver module.
1217  *
1218  * This initiates the semaphore and registers the device with
1219  * USB bus.
1220  */
1221 static int mwifiex_usb_init_module(void)
1222 {
1223         int ret;
1224 
1225         pr_debug("Marvell USB8797 Driver\n");
1226 
1227         sema_init(&add_remove_card_sem, 1);
1228 
1229         ret = usb_register(&mwifiex_usb_driver);
1230         if (ret)
1231                 pr_err("Driver register failed!\n");
1232         else
1233                 pr_debug("info: Driver registered successfully!\n");
1234 
1235         return ret;
1236 }
1237 
1238 /* This function cleans up the USB driver.
1239  *
1240  * The following major steps are followed in .disconnect for cleanup:
1241  *      - Resume the device if its suspended
1242  *      - Disconnect the device if connected
1243  *      - Shutdown the firmware
1244  *      - Unregister the device from USB bus.
1245  */
1246 static void mwifiex_usb_cleanup_module(void)
1247 {
1248         if (!down_interruptible(&add_remove_card_sem))
1249                 up(&add_remove_card_sem);
1250 
1251         /* set the flag as user is removing this module */
1252         user_rmmod = 1;
1253 
1254         usb_deregister(&mwifiex_usb_driver);
1255 }
1256 
1257 module_init(mwifiex_usb_init_module);
1258 module_exit(mwifiex_usb_cleanup_module);
1259 
1260 MODULE_AUTHOR("Marvell International Ltd.");
1261 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1262 MODULE_VERSION(USB_VERSION);
1263 MODULE_LICENSE("GPL v2");
1264 MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
1265 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1266 MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
1267 MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);
1268 

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