2 * Marvell Wireless LAN device driver: USB specific handling
4 * Copyright (C) 2012-2014, Marvell International Ltd.
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.
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.
23 #define USB_VERSION "1.0"
26 static struct mwifiex_if_ops usb_ops;
27 static struct semaphore add_remove_card_sem;
29 static struct usb_device_id mwifiex_usb_table[] = {
31 {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
32 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
33 USB_CLASS_VENDOR_SPEC,
34 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
36 {USB_DEVICE(USB8XXX_VID, USB8897_PID_1)},
37 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8897_PID_2,
38 USB_CLASS_VENDOR_SPEC,
39 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
40 { } /* Terminating entry */
43 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
45 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
47 /* This function handles received packet. Necessary action is taken based on
50 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
51 struct sk_buff *skb, u8 ep)
53 struct device *dev = adapter->dev;
58 if (adapter->hs_activated)
59 mwifiex_process_hs_config(adapter);
61 if (skb->len < INTF_HEADER_LEN) {
62 dev_err(dev, "%s: invalid skb->len\n", __func__);
67 case MWIFIEX_USB_EP_CMD_EVENT:
68 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
69 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
70 recv_type = le32_to_cpu(tmp);
71 skb_pull(skb, INTF_HEADER_LEN);
74 case MWIFIEX_USB_TYPE_CMD:
75 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
76 dev_err(dev, "CMD: skb->len too large\n");
78 goto exit_restore_skb;
79 } else if (!adapter->curr_cmd) {
80 dev_dbg(dev, "CMD: no curr_cmd\n");
81 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
82 mwifiex_process_sleep_confirm_resp(
86 goto exit_restore_skb;
89 goto exit_restore_skb;
92 adapter->curr_cmd->resp_skb = skb;
93 adapter->cmd_resp_received = true;
95 case MWIFIEX_USB_TYPE_EVENT:
96 if (skb->len < sizeof(u32)) {
97 dev_err(dev, "EVENT: skb->len too small\n");
99 goto exit_restore_skb;
101 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
102 adapter->event_cause = le32_to_cpu(tmp);
103 dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
105 if (skb->len > MAX_EVENT_SIZE) {
106 dev_err(dev, "EVENT: event body too large\n");
108 goto exit_restore_skb;
111 memcpy(adapter->event_body, skb->data +
112 MWIFIEX_EVENT_HEADER_LEN, skb->len);
114 adapter->event_received = true;
115 adapter->event_skb = skb;
118 dev_err(dev, "unknown recv_type %#x\n", recv_type);
122 case MWIFIEX_USB_EP_DATA:
123 dev_dbg(dev, "%s: EP_DATA\n", __func__);
124 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
125 dev_err(dev, "DATA: skb->len too large\n");
128 skb_queue_tail(&adapter->usb_rx_data_q, skb);
129 adapter->data_received = true;
132 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
139 /* The buffer will be reused for further cmds/events */
140 skb_push(skb, INTF_HEADER_LEN);
145 static void mwifiex_usb_rx_complete(struct urb *urb)
147 struct urb_context *context = (struct urb_context *)urb->context;
148 struct mwifiex_adapter *adapter = context->adapter;
149 struct sk_buff *skb = context->skb;
150 struct usb_card_rec *card;
151 int recv_length = urb->actual_length;
154 if (!adapter || !adapter->card) {
155 pr_err("mwifiex adapter or card structure is not valid\n");
159 card = (struct usb_card_rec *)adapter->card;
160 if (card->rx_cmd_ep == context->ep)
161 atomic_dec(&card->rx_cmd_urb_pending);
163 atomic_dec(&card->rx_data_urb_pending);
166 if (urb->status || (adapter->surprise_removed)) {
167 dev_err(adapter->dev,
168 "URB status is failed: %d\n", urb->status);
169 /* Do not free skb in case of command ep */
170 if (card->rx_cmd_ep != context->ep)
171 dev_kfree_skb_any(skb);
174 if (skb->len > recv_length)
175 skb_trim(skb, recv_length);
177 skb_put(skb, recv_length - skb->len);
179 atomic_inc(&adapter->rx_pending);
180 status = mwifiex_usb_recv(adapter, skb, context->ep);
182 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
183 recv_length, status);
184 if (status == -EINPROGRESS) {
185 queue_work(adapter->workqueue, &adapter->main_work);
187 /* urb for data_ep is re-submitted now;
188 * urb for cmd_ep will be re-submitted in callback
189 * mwifiex_usb_recv_complete
191 if (card->rx_cmd_ep == context->ep)
194 atomic_dec(&adapter->rx_pending);
196 dev_err(adapter->dev,
197 "received data processing failed!\n");
199 /* Do not free skb in case of command ep */
200 if (card->rx_cmd_ep != context->ep)
201 dev_kfree_skb_any(skb);
203 } else if (urb->status) {
204 if (!adapter->is_suspended) {
205 dev_warn(adapter->dev,
206 "Card is removed: %d\n", urb->status);
207 adapter->surprise_removed = true;
209 dev_kfree_skb_any(skb);
212 /* Do not free skb in case of command ep */
213 if (card->rx_cmd_ep != context->ep)
214 dev_kfree_skb_any(skb);
216 /* fall through setup_for_next */
220 if (card->rx_cmd_ep == context->ep)
221 size = MWIFIEX_RX_CMD_BUF_SIZE;
223 size = MWIFIEX_RX_DATA_BUF_SIZE;
225 mwifiex_usb_submit_rx_urb(context, size);
230 static void mwifiex_usb_tx_complete(struct urb *urb)
232 struct urb_context *context = (struct urb_context *)(urb->context);
233 struct mwifiex_adapter *adapter = context->adapter;
234 struct usb_card_rec *card = adapter->card;
236 dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
238 if (context->ep == card->tx_cmd_ep) {
239 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
240 atomic_dec(&card->tx_cmd_urb_pending);
241 adapter->cmd_sent = false;
243 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
244 atomic_dec(&card->tx_data_urb_pending);
245 mwifiex_write_data_complete(adapter, context->skb, 0,
246 urb->status ? -1 : 0);
249 queue_work(adapter->workqueue, &adapter->main_work);
254 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
256 struct mwifiex_adapter *adapter = ctx->adapter;
257 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
259 if (card->rx_cmd_ep != ctx->ep) {
260 ctx->skb = dev_alloc_skb(size);
262 dev_err(adapter->dev,
263 "%s: dev_alloc_skb failed\n", __func__);
268 usb_fill_bulk_urb(ctx->urb, card->udev,
269 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
270 size, mwifiex_usb_rx_complete, (void *)ctx);
272 if (card->rx_cmd_ep == ctx->ep)
273 atomic_inc(&card->rx_cmd_urb_pending);
275 atomic_inc(&card->rx_data_urb_pending);
277 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
278 dev_err(adapter->dev, "usb_submit_urb failed\n");
279 dev_kfree_skb_any(ctx->skb);
282 if (card->rx_cmd_ep == ctx->ep)
283 atomic_dec(&card->rx_cmd_urb_pending);
285 atomic_dec(&card->rx_data_urb_pending);
293 static void mwifiex_usb_free(struct usb_card_rec *card)
297 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
298 usb_kill_urb(card->rx_cmd.urb);
300 usb_free_urb(card->rx_cmd.urb);
301 card->rx_cmd.urb = NULL;
303 if (atomic_read(&card->rx_data_urb_pending))
304 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
305 if (card->rx_data_list[i].urb)
306 usb_kill_urb(card->rx_data_list[i].urb);
308 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
309 usb_free_urb(card->rx_data_list[i].urb);
310 card->rx_data_list[i].urb = NULL;
313 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
314 usb_free_urb(card->tx_data_list[i].urb);
315 card->tx_data_list[i].urb = NULL;
318 usb_free_urb(card->tx_cmd.urb);
319 card->tx_cmd.urb = NULL;
324 /* This function probes an mwifiex device and registers it. It allocates
325 * the card structure, initiates the device registration and initialization
326 * procedure by adding a logical interface.
328 static int mwifiex_usb_probe(struct usb_interface *intf,
329 const struct usb_device_id *id)
331 struct usb_device *udev = interface_to_usbdev(intf);
332 struct usb_host_interface *iface_desc = intf->cur_altsetting;
333 struct usb_endpoint_descriptor *epd;
335 struct usb_card_rec *card;
336 u16 id_vendor, id_product, bcd_device, bcd_usb;
338 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
342 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
343 id_product = le16_to_cpu(udev->descriptor.idProduct);
344 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
345 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
346 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
347 id_vendor, id_product, bcd_device);
349 /* PID_1 is used for firmware downloading only */
350 switch (id_product) {
353 card->usb_boot_state = USB8XXX_FW_DNLD;
357 card->usb_boot_state = USB8XXX_FW_READY;
360 pr_warn("unknown id_product %#x\n", id_product);
361 card->usb_boot_state = USB8XXX_FW_DNLD;
368 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
369 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
370 udev->descriptor.bDeviceSubClass,
371 udev->descriptor.bDeviceProtocol);
373 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
374 epd = &iface_desc->endpoint[i].desc;
375 if (usb_endpoint_dir_in(epd) &&
376 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
377 usb_endpoint_xfer_bulk(epd)) {
378 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
379 le16_to_cpu(epd->wMaxPacketSize),
380 epd->bEndpointAddress);
381 card->rx_cmd_ep = usb_endpoint_num(epd);
382 atomic_set(&card->rx_cmd_urb_pending, 0);
384 if (usb_endpoint_dir_in(epd) &&
385 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
386 usb_endpoint_xfer_bulk(epd)) {
387 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
388 le16_to_cpu(epd->wMaxPacketSize),
389 epd->bEndpointAddress);
390 card->rx_data_ep = usb_endpoint_num(epd);
391 atomic_set(&card->rx_data_urb_pending, 0);
393 if (usb_endpoint_dir_out(epd) &&
394 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
395 usb_endpoint_xfer_bulk(epd)) {
396 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
397 le16_to_cpu(epd->wMaxPacketSize),
398 epd->bEndpointAddress);
399 card->tx_data_ep = usb_endpoint_num(epd);
400 atomic_set(&card->tx_data_urb_pending, 0);
402 if (usb_endpoint_dir_out(epd) &&
403 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
404 usb_endpoint_xfer_bulk(epd)) {
405 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
406 le16_to_cpu(epd->wMaxPacketSize),
407 epd->bEndpointAddress);
408 card->tx_cmd_ep = usb_endpoint_num(epd);
409 atomic_set(&card->tx_cmd_urb_pending, 0);
410 card->bulk_out_maxpktsize =
411 le16_to_cpu(epd->wMaxPacketSize);
415 usb_set_intfdata(intf, card);
417 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
420 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
421 usb_reset_device(udev);
431 /* Kernel needs to suspend all functions separately. Therefore all
432 * registered functions must have drivers with suspend and resume
433 * methods. Failing that the kernel simply removes the whole card.
435 * If already not suspended, this function allocates and sends a
436 * 'host sleep activate' request to the firmware and turns off the traffic.
438 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
440 struct usb_card_rec *card = usb_get_intfdata(intf);
441 struct mwifiex_adapter *adapter;
444 if (!card || !card->adapter) {
445 pr_err("%s: card or card->adapter is NULL\n", __func__);
448 adapter = card->adapter;
450 if (unlikely(adapter->is_suspended))
451 dev_warn(adapter->dev, "Device already suspended\n");
453 mwifiex_enable_hs(adapter);
455 /* 'is_suspended' flag indicates device is suspended.
456 * It must be set here before the usb_kill_urb() calls. Reason
457 * is in the complete handlers, urb->status(= -ENOENT) and
458 * this flag is used in combination to distinguish between a
459 * 'suspended' state and a 'disconnect' one.
461 adapter->is_suspended = true;
462 adapter->hs_enabling = false;
464 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
465 usb_kill_urb(card->rx_cmd.urb);
467 if (atomic_read(&card->rx_data_urb_pending))
468 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
469 if (card->rx_data_list[i].urb)
470 usb_kill_urb(card->rx_data_list[i].urb);
472 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
473 if (card->tx_data_list[i].urb)
474 usb_kill_urb(card->tx_data_list[i].urb);
476 if (card->tx_cmd.urb)
477 usb_kill_urb(card->tx_cmd.urb);
482 /* Kernel needs to suspend all functions separately. Therefore all
483 * registered functions must have drivers with suspend and resume
484 * methods. Failing that the kernel simply removes the whole card.
486 * If already not resumed, this function turns on the traffic and
487 * sends a 'host sleep cancel' request to the firmware.
489 static int mwifiex_usb_resume(struct usb_interface *intf)
491 struct usb_card_rec *card = usb_get_intfdata(intf);
492 struct mwifiex_adapter *adapter;
495 if (!card || !card->adapter) {
496 pr_err("%s: card or card->adapter is NULL\n", __func__);
499 adapter = card->adapter;
501 if (unlikely(!adapter->is_suspended)) {
502 dev_warn(adapter->dev, "Device already resumed\n");
506 /* Indicate device resumed. The netdev queue will be resumed only
507 * after the urbs have been re-submitted
509 adapter->is_suspended = false;
511 if (!atomic_read(&card->rx_data_urb_pending))
512 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
513 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
514 MWIFIEX_RX_DATA_BUF_SIZE);
516 if (!atomic_read(&card->rx_cmd_urb_pending)) {
517 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
518 if (card->rx_cmd.skb)
519 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
520 MWIFIEX_RX_CMD_BUF_SIZE);
523 /* Disable Host Sleep */
524 if (adapter->hs_activated)
525 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
526 MWIFIEX_BSS_ROLE_ANY),
532 static void mwifiex_usb_disconnect(struct usb_interface *intf)
534 struct usb_card_rec *card = usb_get_intfdata(intf);
535 struct mwifiex_adapter *adapter;
537 if (!card || !card->adapter) {
538 pr_err("%s: card or card->adapter is NULL\n", __func__);
542 adapter = card->adapter;
543 if (!adapter->priv_num)
548 if (adapter->is_suspended)
549 mwifiex_usb_resume(intf);
552 mwifiex_deauthenticate_all(adapter);
554 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
555 MWIFIEX_BSS_ROLE_ANY),
556 MWIFIEX_FUNC_SHUTDOWN);
559 mwifiex_usb_free(card);
561 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
562 mwifiex_remove_card(adapter, &add_remove_card_sem);
564 usb_set_intfdata(intf, NULL);
565 usb_put_dev(interface_to_usbdev(intf));
571 static struct usb_driver mwifiex_usb_driver = {
572 .name = "mwifiex_usb",
573 .probe = mwifiex_usb_probe,
574 .disconnect = mwifiex_usb_disconnect,
575 .id_table = mwifiex_usb_table,
576 .suspend = mwifiex_usb_suspend,
577 .resume = mwifiex_usb_resume,
581 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
583 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
586 card->tx_cmd.adapter = adapter;
587 card->tx_cmd.ep = card->tx_cmd_ep;
589 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
590 if (!card->tx_cmd.urb) {
591 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
595 card->tx_data_ix = 0;
597 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
598 card->tx_data_list[i].adapter = adapter;
599 card->tx_data_list[i].ep = card->tx_data_ep;
601 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
602 if (!card->tx_data_list[i].urb) {
603 dev_err(adapter->dev,
604 "tx_data_list[] urb allocation failed\n");
612 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
614 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
617 card->rx_cmd.adapter = adapter;
618 card->rx_cmd.ep = card->rx_cmd_ep;
620 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
621 if (!card->rx_cmd.urb) {
622 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
626 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
627 if (!card->rx_cmd.skb) {
628 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
632 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
635 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
636 card->rx_data_list[i].adapter = adapter;
637 card->rx_data_list[i].ep = card->rx_data_ep;
639 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
640 if (!card->rx_data_list[i].urb) {
641 dev_err(adapter->dev,
642 "rx_data_list[] urb allocation failed\n");
645 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
646 MWIFIEX_RX_DATA_BUF_SIZE))
653 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
654 u32 *len, u8 ep, u32 timeout)
656 struct usb_card_rec *card = adapter->card;
657 int actual_length, ret;
659 if (!(*len % card->bulk_out_maxpktsize))
662 /* Send the data block */
663 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
664 *len, &actual_length, timeout);
666 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
670 *len = actual_length;
675 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
676 u32 *len, u8 ep, u32 timeout)
678 struct usb_card_rec *card = adapter->card;
679 int actual_length, ret;
681 /* Receive the data response */
682 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
683 *len, &actual_length, timeout);
685 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
689 *len = actual_length;
694 /* This function write a command/data packet to card. */
695 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
697 struct mwifiex_tx_param *tx_param)
699 struct usb_card_rec *card = adapter->card;
700 struct urb_context *context;
701 u8 *data = (u8 *)skb->data;
704 if (adapter->is_suspended) {
705 dev_err(adapter->dev,
706 "%s: not allowed while suspended\n", __func__);
710 if (adapter->surprise_removed) {
711 dev_err(adapter->dev, "%s: device removed\n", __func__);
715 if (ep == card->tx_data_ep &&
716 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
720 dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
722 if (ep == card->tx_cmd_ep) {
723 context = &card->tx_cmd;
725 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
726 card->tx_data_ix = 0;
727 context = &card->tx_data_list[card->tx_data_ix++];
730 context->adapter = adapter;
733 tx_urb = context->urb;
735 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
736 data, skb->len, mwifiex_usb_tx_complete,
739 tx_urb->transfer_flags |= URB_ZERO_PACKET;
741 if (ep == card->tx_cmd_ep)
742 atomic_inc(&card->tx_cmd_urb_pending);
744 atomic_inc(&card->tx_data_urb_pending);
746 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
747 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
748 if (ep == card->tx_cmd_ep) {
749 atomic_dec(&card->tx_cmd_urb_pending);
751 atomic_dec(&card->tx_data_urb_pending);
752 if (card->tx_data_ix)
755 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
760 if (ep == card->tx_data_ep &&
761 atomic_read(&card->tx_data_urb_pending) ==
769 /* This function register usb device and initialize parameter. */
770 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
772 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
774 card->adapter = adapter;
775 adapter->dev = &card->udev->dev;
777 switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
780 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
781 strcpy(adapter->fw_name, USB8897_DEFAULT_FW_NAME);
786 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
787 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
794 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
796 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
798 card->adapter = NULL;
801 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
802 struct mwifiex_fw_image *fw)
805 u8 *firmware = fw->fw_buf, *recv_buff;
806 u32 retries = USB8XXX_FW_MAX_RETRY, dlen;
807 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
808 struct fw_data *fwdata;
809 struct fw_sync_header sync_fw;
813 dev_err(adapter->dev,
814 "No firmware image found! Terminating download\n");
819 /* Allocate memory for transmit */
820 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
824 /* Allocate memory for receive */
825 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
830 /* Send pseudo data to check winner status first */
832 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
835 /* copy the header of the fw_data to get the length */
836 memcpy(&fwdata->fw_hdr, &firmware[tlen],
837 sizeof(struct fw_header));
839 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
840 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
841 tlen += sizeof(struct fw_header);
843 memcpy(fwdata->data, &firmware[tlen], dlen);
845 fwdata->seq_num = cpu_to_le32(fw_seqnum);
849 /* If the send/receive fails or CRC occurs then retry */
851 u8 *buf = (u8 *)fwdata;
852 u32 len = FW_DATA_XMIT_SIZE;
854 /* send the firmware block */
855 ret = mwifiex_write_data_sync(adapter, buf, &len,
856 MWIFIEX_USB_EP_CMD_EVENT,
857 MWIFIEX_USB_TIMEOUT);
859 dev_err(adapter->dev,
860 "write_data_sync: failed: %d\n", ret);
865 len = FW_DNLD_RX_BUF_SIZE;
867 /* Receive the firmware block response */
868 ret = mwifiex_read_data_sync(adapter, buf, &len,
869 MWIFIEX_USB_EP_CMD_EVENT,
870 MWIFIEX_USB_TIMEOUT);
872 dev_err(adapter->dev,
873 "read_data_sync: failed: %d\n", ret);
877 memcpy(&sync_fw, recv_buff,
878 sizeof(struct fw_sync_header));
880 /* check 1st firmware block resp for highest bit set */
882 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
883 dev_warn(adapter->dev,
884 "USB is not the winner %#x\n",
887 /* returning success */
892 dev_dbg(adapter->dev,
893 "USB is the winner, start to download FW\n");
899 /* check the firmware block response for CRC errors */
901 dev_err(adapter->dev,
902 "FW received block with CRC %#x\n",
908 retries = USB8XXX_FW_MAX_RETRY;
912 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
915 dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
926 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
927 struct mwifiex_fw_image *fw)
930 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
932 if (card->usb_boot_state == USB8XXX_FW_DNLD) {
933 ret = mwifiex_prog_fw_w_helper(adapter, fw);
937 /* Boot state changes after successful firmware download */
938 if (card->usb_boot_state == USB8XXX_FW_DNLD)
942 ret = mwifiex_usb_rx_init(adapter);
944 ret = mwifiex_usb_tx_init(adapter);
949 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
951 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
953 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
954 if ((ep == card->rx_cmd_ep) &&
955 (!atomic_read(&card->rx_cmd_urb_pending)))
956 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
957 MWIFIEX_RX_CMD_BUF_SIZE);
962 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
965 atomic_dec(&adapter->rx_pending);
966 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
971 static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter)
973 atomic_dec(&adapter->rx_pending);
978 /* This function wakes up the card. */
979 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
981 /* Simulation of HS_AWAKE event */
982 adapter->pm_wakeup_fw_try = false;
983 adapter->pm_wakeup_card_req = false;
984 adapter->ps_state = PS_STATE_AWAKE;
989 static struct mwifiex_if_ops usb_ops = {
990 .register_dev = mwifiex_register_dev,
991 .unregister_dev = mwifiex_unregister_dev,
992 .wakeup = mwifiex_pm_wakeup_card,
993 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
996 .dnld_fw = mwifiex_usb_dnld_fw,
997 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
998 .event_complete = mwifiex_usb_cmd_event_complete,
999 .data_complete = mwifiex_usb_data_complete,
1000 .host_to_card = mwifiex_usb_host_to_card,
1003 /* This function initializes the USB driver module.
1005 * This initiates the semaphore and registers the device with
1008 static int mwifiex_usb_init_module(void)
1012 pr_debug("Marvell USB8797 Driver\n");
1014 sema_init(&add_remove_card_sem, 1);
1016 ret = usb_register(&mwifiex_usb_driver);
1018 pr_err("Driver register failed!\n");
1020 pr_debug("info: Driver registered successfully!\n");
1025 /* This function cleans up the USB driver.
1027 * The following major steps are followed in .disconnect for cleanup:
1028 * - Resume the device if its suspended
1029 * - Disconnect the device if connected
1030 * - Shutdown the firmware
1031 * - Unregister the device from USB bus.
1033 static void mwifiex_usb_cleanup_module(void)
1035 if (!down_interruptible(&add_remove_card_sem))
1036 up(&add_remove_card_sem);
1038 /* set the flag as user is removing this module */
1041 usb_deregister(&mwifiex_usb_driver);
1044 module_init(mwifiex_usb_init_module);
1045 module_exit(mwifiex_usb_cleanup_module);
1047 MODULE_AUTHOR("Marvell International Ltd.");
1048 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1049 MODULE_VERSION(USB_VERSION);
1050 MODULE_LICENSE("GPL v2");
1051 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1052 MODULE_FIRMWARE(USB8897_DEFAULT_FW_NAME);