1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * NXP Wireless LAN device driver: USB specific handling
4 *
5 * Copyright 2011-2020 NXP
6 */
7
8 #include "main.h"
9 #include "usb.h"
10
11 #define USB_VERSION "1.0"
12
13 static struct mwifiex_if_ops usb_ops;
14
15 static const struct usb_device_id mwifiex_usb_table[] = {
16 /* 8766 */
17 {USB_DEVICE(USB8XXX_VID, USB8766_PID_1)},
18 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8766_PID_2,
19 USB_CLASS_VENDOR_SPEC,
20 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
21 /* 8797 */
22 {USB_DEVICE(USB8XXX_VID, USB8797_PID_1)},
23 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8797_PID_2,
24 USB_CLASS_VENDOR_SPEC,
25 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
26 /* 8801 */
27 {USB_DEVICE(USB8XXX_VID, USB8801_PID_1)},
28 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8801_PID_2,
29 USB_CLASS_VENDOR_SPEC,
30 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
31 /* 8997 */
32 {USB_DEVICE(USB8XXX_VID, USB8997_PID_1)},
33 {USB_DEVICE_AND_INTERFACE_INFO(USB8XXX_VID, USB8997_PID_2,
34 USB_CLASS_VENDOR_SPEC,
35 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
36 { } /* Terminating entry */
37 };
38
39 MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
40
41 static 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 */
mwifiex_usb_recv(struct mwifiex_adapter * adapter,struct sk_buff * skb,u8 ep)46 static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
47 struct sk_buff *skb, u8 ep)
48 {
49 u32 recv_type;
50 __le32 tmp;
51 int ret;
52
53 if (adapter->hs_activated)
54 mwifiex_process_hs_config(adapter);
55
56 if (skb->len < INTF_HEADER_LEN) {
57 mwifiex_dbg(adapter, ERROR,
58 "%s: invalid skb->len\n", __func__);
59 return -1;
60 }
61
62 switch (ep) {
63 case MWIFIEX_USB_EP_CMD_EVENT:
64 mwifiex_dbg(adapter, EVENT,
65 "%s: EP_CMD_EVENT\n", __func__);
66 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
67 recv_type = le32_to_cpu(tmp);
68 skb_pull(skb, INTF_HEADER_LEN);
69
70 switch (recv_type) {
71 case MWIFIEX_USB_TYPE_CMD:
72 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
73 mwifiex_dbg(adapter, ERROR,
74 "CMD: skb->len too large\n");
75 ret = -1;
76 goto exit_restore_skb;
77 } else if (!adapter->curr_cmd) {
78 mwifiex_dbg(adapter, WARN, "CMD: no curr_cmd\n");
79 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
80 mwifiex_process_sleep_confirm_resp(
81 adapter, skb->data,
82 skb->len);
83 ret = 0;
84 goto exit_restore_skb;
85 }
86 ret = -1;
87 goto exit_restore_skb;
88 }
89
90 adapter->curr_cmd->resp_skb = skb;
91 adapter->cmd_resp_received = true;
92 break;
93 case MWIFIEX_USB_TYPE_EVENT:
94 if (skb->len < sizeof(u32)) {
95 mwifiex_dbg(adapter, ERROR,
96 "EVENT: skb->len too small\n");
97 ret = -1;
98 goto exit_restore_skb;
99 }
100 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
101 adapter->event_cause = le32_to_cpu(tmp);
102 mwifiex_dbg(adapter, EVENT,
103 "event_cause %#x\n", adapter->event_cause);
104
105 if (skb->len > MAX_EVENT_SIZE) {
106 mwifiex_dbg(adapter, ERROR,
107 "EVENT: event body too large\n");
108 ret = -1;
109 goto exit_restore_skb;
110 }
111
112 memcpy(adapter->event_body, skb->data +
113 MWIFIEX_EVENT_HEADER_LEN, skb->len);
114
115 adapter->event_received = true;
116 adapter->event_skb = skb;
117 break;
118 default:
119 mwifiex_dbg(adapter, ERROR,
120 "unknown recv_type %#x\n", recv_type);
121 ret = -1;
122 goto exit_restore_skb;
123 }
124 break;
125 case MWIFIEX_USB_EP_DATA:
126 mwifiex_dbg(adapter, DATA, "%s: EP_DATA\n", __func__);
127 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
128 mwifiex_dbg(adapter, ERROR,
129 "DATA: skb->len too large\n");
130 return -1;
131 }
132
133 skb_queue_tail(&adapter->rx_data_q, skb);
134 adapter->data_received = true;
135 atomic_inc(&adapter->rx_pending);
136 break;
137 default:
138 mwifiex_dbg(adapter, ERROR,
139 "%s: unknown endport %#x\n", __func__, ep);
140 return -1;
141 }
142
143 return -EINPROGRESS;
144
145 exit_restore_skb:
146 /* The buffer will be reused for further cmds/events */
147 skb_push(skb, INTF_HEADER_LEN);
148
149 return ret;
150 }
151
mwifiex_usb_rx_complete(struct urb * urb)152 static void mwifiex_usb_rx_complete(struct urb *urb)
153 {
154 struct urb_context *context = (struct urb_context *)urb->context;
155 struct mwifiex_adapter *adapter = context->adapter;
156 struct sk_buff *skb = context->skb;
157 struct usb_card_rec *card;
158 int recv_length = urb->actual_length;
159 int size, status;
160
161 if (!adapter || !adapter->card) {
162 pr_err("mwifiex adapter or card structure is not valid\n");
163 return;
164 }
165
166 card = (struct usb_card_rec *)adapter->card;
167 if (card->rx_cmd_ep == context->ep)
168 atomic_dec(&card->rx_cmd_urb_pending);
169 else
170 atomic_dec(&card->rx_data_urb_pending);
171
172 if (recv_length) {
173 if (urb->status ||
174 test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags)) {
175 mwifiex_dbg(adapter, ERROR,
176 "URB status is failed: %d\n", urb->status);
177 /* Do not free skb in case of command ep */
178 if (card->rx_cmd_ep != context->ep)
179 dev_kfree_skb_any(skb);
180 goto setup_for_next;
181 }
182 if (skb->len > recv_length)
183 skb_trim(skb, recv_length);
184 else
185 skb_put(skb, recv_length - skb->len);
186
187 status = mwifiex_usb_recv(adapter, skb, context->ep);
188
189 mwifiex_dbg(adapter, INFO,
190 "info: recv_length=%d, status=%d\n",
191 recv_length, status);
192 if (status == -EINPROGRESS) {
193 mwifiex_queue_main_work(adapter);
194
195 /* urb for data_ep is re-submitted now;
196 * urb for cmd_ep will be re-submitted in callback
197 * mwifiex_usb_recv_complete
198 */
199 if (card->rx_cmd_ep == context->ep)
200 return;
201 } else {
202 if (status == -1)
203 mwifiex_dbg(adapter, ERROR,
204 "received data processing failed!\n");
205
206 /* Do not free skb in case of command ep */
207 if (card->rx_cmd_ep != context->ep)
208 dev_kfree_skb_any(skb);
209 }
210 } else if (urb->status) {
211 if (!test_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags)) {
212 mwifiex_dbg(adapter, FATAL,
213 "Card is removed: %d\n", urb->status);
214 set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags);
215 }
216 dev_kfree_skb_any(skb);
217 return;
218 } else {
219 /* Do not free skb in case of command ep */
220 if (card->rx_cmd_ep != context->ep)
221 dev_kfree_skb_any(skb);
222
223 /* fall through setup_for_next */
224 }
225
226 setup_for_next:
227 if (card->rx_cmd_ep == context->ep)
228 size = MWIFIEX_RX_CMD_BUF_SIZE;
229 else
230 size = MWIFIEX_RX_DATA_BUF_SIZE;
231
232 if (card->rx_cmd_ep == context->ep) {
233 mwifiex_usb_submit_rx_urb(context, size);
234 } else {
235 if (atomic_read(&adapter->rx_pending) <= HIGH_RX_PENDING) {
236 mwifiex_usb_submit_rx_urb(context, size);
237 } else {
238 context->skb = NULL;
239 }
240 }
241
242 return;
243 }
244
mwifiex_usb_tx_complete(struct urb * urb)245 static void mwifiex_usb_tx_complete(struct urb *urb)
246 {
247 struct urb_context *context = (struct urb_context *)(urb->context);
248 struct mwifiex_adapter *adapter = context->adapter;
249 struct usb_card_rec *card = adapter->card;
250 struct usb_tx_data_port *port;
251 int i;
252
253 mwifiex_dbg(adapter, INFO,
254 "%s: status: %d\n", __func__, urb->status);
255
256 if (context->ep == card->tx_cmd_ep) {
257 mwifiex_dbg(adapter, CMD,
258 "%s: CMD\n", __func__);
259 atomic_dec(&card->tx_cmd_urb_pending);
260 adapter->cmd_sent = false;
261 } else {
262 mwifiex_dbg(adapter, DATA,
263 "%s: DATA\n", __func__);
264 mwifiex_write_data_complete(adapter, context->skb, 0,
265 urb->status ? -1 : 0);
266 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
267 port = &card->port[i];
268 if (context->ep == port->tx_data_ep) {
269 atomic_dec(&port->tx_data_urb_pending);
270 port->block_status = false;
271 break;
272 }
273 }
274 adapter->data_sent = false;
275 }
276
277 if (card->mc_resync_flag)
278 mwifiex_multi_chan_resync(adapter);
279
280 mwifiex_queue_main_work(adapter);
281
282 return;
283 }
284
mwifiex_usb_submit_rx_urb(struct urb_context * ctx,int size)285 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
286 {
287 struct mwifiex_adapter *adapter = ctx->adapter;
288 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
289
290 if (test_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags)) {
291 if (card->rx_cmd_ep == ctx->ep) {
292 mwifiex_dbg(adapter, INFO, "%s: free rx_cmd skb\n",
293 __func__);
294 dev_kfree_skb_any(ctx->skb);
295 ctx->skb = NULL;
296 }
297 mwifiex_dbg(adapter, ERROR,
298 "%s: card removed/suspended, EP %d rx_cmd URB submit skipped\n",
299 __func__, ctx->ep);
300 return -1;
301 }
302
303 if (card->rx_cmd_ep != ctx->ep) {
304 ctx->skb = dev_alloc_skb(size);
305 if (!ctx->skb) {
306 mwifiex_dbg(adapter, ERROR,
307 "%s: dev_alloc_skb failed\n", __func__);
308 return -ENOMEM;
309 }
310 }
311
312 if (card->rx_cmd_ep == ctx->ep &&
313 card->rx_cmd_ep_type == USB_ENDPOINT_XFER_INT)
314 usb_fill_int_urb(ctx->urb, card->udev,
315 usb_rcvintpipe(card->udev, ctx->ep),
316 ctx->skb->data, size, mwifiex_usb_rx_complete,
317 (void *)ctx, card->rx_cmd_interval);
318 else
319 usb_fill_bulk_urb(ctx->urb, card->udev,
320 usb_rcvbulkpipe(card->udev, ctx->ep),
321 ctx->skb->data, size, mwifiex_usb_rx_complete,
322 (void *)ctx);
323
324 if (card->rx_cmd_ep == ctx->ep)
325 atomic_inc(&card->rx_cmd_urb_pending);
326 else
327 atomic_inc(&card->rx_data_urb_pending);
328
329 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
330 mwifiex_dbg(adapter, ERROR, "usb_submit_urb failed\n");
331 dev_kfree_skb_any(ctx->skb);
332 ctx->skb = NULL;
333
334 if (card->rx_cmd_ep == ctx->ep)
335 atomic_dec(&card->rx_cmd_urb_pending);
336 else
337 atomic_dec(&card->rx_data_urb_pending);
338
339 return -1;
340 }
341
342 return 0;
343 }
344
mwifiex_usb_free(struct usb_card_rec * card)345 static void mwifiex_usb_free(struct usb_card_rec *card)
346 {
347 struct usb_tx_data_port *port;
348 int i, j;
349
350 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
351 usb_kill_urb(card->rx_cmd.urb);
352
353 usb_free_urb(card->rx_cmd.urb);
354 card->rx_cmd.urb = NULL;
355
356 if (atomic_read(&card->rx_data_urb_pending))
357 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
358 if (card->rx_data_list[i].urb)
359 usb_kill_urb(card->rx_data_list[i].urb);
360
361 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
362 usb_free_urb(card->rx_data_list[i].urb);
363 card->rx_data_list[i].urb = NULL;
364 }
365
366 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
367 port = &card->port[i];
368 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
369 usb_kill_urb(port->tx_data_list[j].urb);
370 usb_free_urb(port->tx_data_list[j].urb);
371 port->tx_data_list[j].urb = NULL;
372 }
373 }
374
375 usb_free_urb(card->tx_cmd.urb);
376 card->tx_cmd.urb = NULL;
377
378 return;
379 }
380
381 /* This function probes an mwifiex device and registers it. It allocates
382 * the card structure, initiates the device registration and initialization
383 * procedure by adding a logical interface.
384 */
mwifiex_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)385 static int mwifiex_usb_probe(struct usb_interface *intf,
386 const struct usb_device_id *id)
387 {
388 struct usb_device *udev = interface_to_usbdev(intf);
389 struct usb_host_interface *iface_desc = intf->cur_altsetting;
390 struct usb_endpoint_descriptor *epd;
391 int ret, i;
392 struct usb_card_rec *card;
393 u16 id_vendor, id_product, bcd_device;
394
395 card = devm_kzalloc(&intf->dev, sizeof(*card), GFP_KERNEL);
396 if (!card)
397 return -ENOMEM;
398
399 init_completion(&card->fw_done);
400
401 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
402 id_product = le16_to_cpu(udev->descriptor.idProduct);
403 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
404 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
405 id_vendor, id_product, bcd_device);
406
407 /* PID_1 is used for firmware downloading only */
408 switch (id_product) {
409 case USB8766_PID_1:
410 case USB8797_PID_1:
411 case USB8801_PID_1:
412 case USB8997_PID_1:
413 card->usb_boot_state = USB8XXX_FW_DNLD;
414 break;
415 case USB8766_PID_2:
416 case USB8797_PID_2:
417 case USB8801_PID_2:
418 case USB8997_PID_2:
419 card->usb_boot_state = USB8XXX_FW_READY;
420 break;
421 default:
422 pr_warn("unknown id_product %#x\n", id_product);
423 card->usb_boot_state = USB8XXX_FW_DNLD;
424 break;
425 }
426
427 card->udev = udev;
428 card->intf = intf;
429
430 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
431 le16_to_cpu(udev->descriptor.bcdUSB),
432 udev->descriptor.bDeviceClass,
433 udev->descriptor.bDeviceSubClass,
434 udev->descriptor.bDeviceProtocol);
435
436 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
437 epd = &iface_desc->endpoint[i].desc;
438 if (usb_endpoint_dir_in(epd) &&
439 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
440 (usb_endpoint_xfer_bulk(epd) ||
441 usb_endpoint_xfer_int(epd))) {
442 card->rx_cmd_ep_type = usb_endpoint_type(epd);
443 card->rx_cmd_interval = epd->bInterval;
444 pr_debug("info: Rx CMD/EVT:: max pkt size: %d, addr: %d, ep_type: %d\n",
445 le16_to_cpu(epd->wMaxPacketSize),
446 epd->bEndpointAddress, card->rx_cmd_ep_type);
447 card->rx_cmd_ep = usb_endpoint_num(epd);
448 atomic_set(&card->rx_cmd_urb_pending, 0);
449 }
450 if (usb_endpoint_dir_in(epd) &&
451 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
452 usb_endpoint_xfer_bulk(epd)) {
453 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
454 le16_to_cpu(epd->wMaxPacketSize),
455 epd->bEndpointAddress);
456 card->rx_data_ep = usb_endpoint_num(epd);
457 atomic_set(&card->rx_data_urb_pending, 0);
458 }
459 if (usb_endpoint_dir_out(epd) &&
460 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
461 usb_endpoint_xfer_bulk(epd)) {
462 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
463 le16_to_cpu(epd->wMaxPacketSize),
464 epd->bEndpointAddress);
465 card->port[0].tx_data_ep = usb_endpoint_num(epd);
466 atomic_set(&card->port[0].tx_data_urb_pending, 0);
467 }
468 if (usb_endpoint_dir_out(epd) &&
469 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA_CH2 &&
470 usb_endpoint_xfer_bulk(epd)) {
471 pr_debug("info: bulk OUT chan2:\t"
472 "max pkt size: %d, addr: %d\n",
473 le16_to_cpu(epd->wMaxPacketSize),
474 epd->bEndpointAddress);
475 card->port[1].tx_data_ep = usb_endpoint_num(epd);
476 atomic_set(&card->port[1].tx_data_urb_pending, 0);
477 }
478 if (usb_endpoint_dir_out(epd) &&
479 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
480 (usb_endpoint_xfer_bulk(epd) ||
481 usb_endpoint_xfer_int(epd))) {
482 card->tx_cmd_ep_type = usb_endpoint_type(epd);
483 card->tx_cmd_interval = epd->bInterval;
484 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
485 le16_to_cpu(epd->wMaxPacketSize),
486 epd->bEndpointAddress);
487 pr_debug("info: Tx CMD:: max pkt size: %d, addr: %d, ep_type: %d\n",
488 le16_to_cpu(epd->wMaxPacketSize),
489 epd->bEndpointAddress, card->tx_cmd_ep_type);
490 card->tx_cmd_ep = usb_endpoint_num(epd);
491 atomic_set(&card->tx_cmd_urb_pending, 0);
492 card->bulk_out_maxpktsize =
493 le16_to_cpu(epd->wMaxPacketSize);
494 }
495 }
496
497 switch (card->usb_boot_state) {
498 case USB8XXX_FW_DNLD:
499 /* Reject broken descriptors. */
500 if (!card->rx_cmd_ep || !card->tx_cmd_ep)
501 return -ENODEV;
502 if (card->bulk_out_maxpktsize == 0)
503 return -ENODEV;
504 break;
505 case USB8XXX_FW_READY:
506 /* Assume the driver can handle missing endpoints for now. */
507 break;
508 default:
509 WARN_ON(1);
510 return -ENODEV;
511 }
512
513 usb_set_intfdata(intf, card);
514
515 ret = mwifiex_add_card(card, &card->fw_done, &usb_ops,
516 MWIFIEX_USB, &card->udev->dev);
517 if (ret) {
518 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
519 usb_reset_device(udev);
520 return ret;
521 }
522
523 usb_get_dev(udev);
524
525 return 0;
526 }
527
528 /* Kernel needs to suspend all functions separately. Therefore all
529 * registered functions must have drivers with suspend and resume
530 * methods. Failing that the kernel simply removes the whole card.
531 *
532 * If already not suspended, this function allocates and sends a
533 * 'host sleep activate' request to the firmware and turns off the traffic.
534 */
mwifiex_usb_suspend(struct usb_interface * intf,pm_message_t message)535 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
536 {
537 struct usb_card_rec *card = usb_get_intfdata(intf);
538 struct mwifiex_adapter *adapter;
539 struct usb_tx_data_port *port;
540 int i, j;
541
542 /* Might still be loading firmware */
543 wait_for_completion(&card->fw_done);
544
545 adapter = card->adapter;
546 if (!adapter) {
547 dev_err(&intf->dev, "card is not valid\n");
548 return 0;
549 }
550
551 if (unlikely(test_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags)))
552 mwifiex_dbg(adapter, WARN,
553 "Device already suspended\n");
554
555 /* Enable the Host Sleep */
556 if (!mwifiex_enable_hs(adapter)) {
557 mwifiex_dbg(adapter, ERROR,
558 "cmd: failed to suspend\n");
559 clear_bit(MWIFIEX_IS_HS_ENABLING, &adapter->work_flags);
560 return -EFAULT;
561 }
562
563
564 /* 'MWIFIEX_IS_SUSPENDED' bit indicates device is suspended.
565 * It must be set here before the usb_kill_urb() calls. Reason
566 * is in the complete handlers, urb->status(= -ENOENT) and
567 * this flag is used in combination to distinguish between a
568 * 'suspended' state and a 'disconnect' one.
569 */
570 set_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags);
571 clear_bit(MWIFIEX_IS_HS_ENABLING, &adapter->work_flags);
572
573 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
574 usb_kill_urb(card->rx_cmd.urb);
575
576 if (atomic_read(&card->rx_data_urb_pending))
577 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
578 if (card->rx_data_list[i].urb)
579 usb_kill_urb(card->rx_data_list[i].urb);
580
581 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
582 port = &card->port[i];
583 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
584 if (port->tx_data_list[j].urb)
585 usb_kill_urb(port->tx_data_list[j].urb);
586 }
587 }
588
589 if (card->tx_cmd.urb)
590 usb_kill_urb(card->tx_cmd.urb);
591
592 return 0;
593 }
594
595 /* Kernel needs to suspend all functions separately. Therefore all
596 * registered functions must have drivers with suspend and resume
597 * methods. Failing that the kernel simply removes the whole card.
598 *
599 * If already not resumed, this function turns on the traffic and
600 * sends a 'host sleep cancel' request to the firmware.
601 */
mwifiex_usb_resume(struct usb_interface * intf)602 static int mwifiex_usb_resume(struct usb_interface *intf)
603 {
604 struct usb_card_rec *card = usb_get_intfdata(intf);
605 struct mwifiex_adapter *adapter;
606 int i;
607
608 if (!card->adapter) {
609 dev_err(&intf->dev, "%s: card->adapter is NULL\n",
610 __func__);
611 return 0;
612 }
613 adapter = card->adapter;
614
615 if (unlikely(!test_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags))) {
616 mwifiex_dbg(adapter, WARN,
617 "Device already resumed\n");
618 return 0;
619 }
620
621 /* Indicate device resumed. The netdev queue will be resumed only
622 * after the urbs have been re-submitted
623 */
624 clear_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags);
625
626 if (!atomic_read(&card->rx_data_urb_pending))
627 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
628 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
629 MWIFIEX_RX_DATA_BUF_SIZE);
630
631 if (!atomic_read(&card->rx_cmd_urb_pending)) {
632 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
633 if (card->rx_cmd.skb)
634 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
635 MWIFIEX_RX_CMD_BUF_SIZE);
636 }
637
638 /* Disable Host Sleep */
639 if (adapter->hs_activated)
640 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
641 MWIFIEX_BSS_ROLE_ANY),
642 MWIFIEX_ASYNC_CMD);
643
644 return 0;
645 }
646
mwifiex_usb_disconnect(struct usb_interface * intf)647 static void mwifiex_usb_disconnect(struct usb_interface *intf)
648 {
649 struct usb_card_rec *card = usb_get_intfdata(intf);
650 struct mwifiex_adapter *adapter;
651
652 wait_for_completion(&card->fw_done);
653
654 adapter = card->adapter;
655 if (!adapter || !adapter->priv_num)
656 return;
657
658 if (card->udev->state != USB_STATE_NOTATTACHED && !adapter->mfg_mode) {
659 mwifiex_deauthenticate_all(adapter);
660
661 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
662 MWIFIEX_BSS_ROLE_ANY),
663 MWIFIEX_FUNC_SHUTDOWN);
664 }
665
666 mwifiex_dbg(adapter, FATAL,
667 "%s: removing card\n", __func__);
668 mwifiex_remove_card(adapter);
669
670 usb_put_dev(interface_to_usbdev(intf));
671 }
672
mwifiex_usb_coredump(struct device * dev)673 static void mwifiex_usb_coredump(struct device *dev)
674 {
675 struct usb_interface *intf = to_usb_interface(dev);
676 struct usb_card_rec *card = usb_get_intfdata(intf);
677
678 mwifiex_fw_dump_event(mwifiex_get_priv(card->adapter,
679 MWIFIEX_BSS_ROLE_ANY));
680 }
681
682 static struct usb_driver mwifiex_usb_driver = {
683 .name = "mwifiex_usb",
684 .probe = mwifiex_usb_probe,
685 .disconnect = mwifiex_usb_disconnect,
686 .id_table = mwifiex_usb_table,
687 .suspend = mwifiex_usb_suspend,
688 .resume = mwifiex_usb_resume,
689 .soft_unbind = 1,
690 .driver = {
691 .coredump = mwifiex_usb_coredump,
692 },
693 };
694
mwifiex_write_data_sync(struct mwifiex_adapter * adapter,u8 * pbuf,u32 * len,u8 ep,u32 timeout)695 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
696 u32 *len, u8 ep, u32 timeout)
697 {
698 struct usb_card_rec *card = adapter->card;
699 int actual_length, ret;
700
701 if (!(*len % card->bulk_out_maxpktsize))
702 (*len)++;
703
704 /* Send the data block */
705 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
706 *len, &actual_length, timeout);
707 if (ret) {
708 mwifiex_dbg(adapter, ERROR,
709 "usb_bulk_msg for tx failed: %d\n", ret);
710 return ret;
711 }
712
713 *len = actual_length;
714
715 return ret;
716 }
717
mwifiex_read_data_sync(struct mwifiex_adapter * adapter,u8 * pbuf,u32 * len,u8 ep,u32 timeout)718 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
719 u32 *len, u8 ep, u32 timeout)
720 {
721 struct usb_card_rec *card = adapter->card;
722 int actual_length, ret;
723
724 /* Receive the data response */
725 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
726 *len, &actual_length, timeout);
727 if (ret) {
728 mwifiex_dbg(adapter, ERROR,
729 "usb_bulk_msg for rx failed: %d\n", ret);
730 return ret;
731 }
732
733 *len = actual_length;
734
735 return ret;
736 }
737
mwifiex_usb_port_resync(struct mwifiex_adapter * adapter)738 static void mwifiex_usb_port_resync(struct mwifiex_adapter *adapter)
739 {
740 struct usb_card_rec *card = adapter->card;
741 u8 active_port = MWIFIEX_USB_EP_DATA;
742 struct mwifiex_private *priv = NULL;
743 int i;
744
745 if (adapter->usb_mc_status) {
746 for (i = 0; i < adapter->priv_num; i++) {
747 priv = adapter->priv[i];
748 if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
749 !priv->bss_started) ||
750 (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
751 !priv->media_connected))
752 priv->usb_port = MWIFIEX_USB_EP_DATA;
753 }
754 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
755 card->port[i].block_status = false;
756 } else {
757 for (i = 0; i < adapter->priv_num; i++) {
758 priv = adapter->priv[i];
759 if ((priv->bss_role == MWIFIEX_BSS_ROLE_UAP &&
760 priv->bss_started) ||
761 (priv->bss_role == MWIFIEX_BSS_ROLE_STA &&
762 priv->media_connected)) {
763 active_port = priv->usb_port;
764 break;
765 }
766 }
767 for (i = 0; i < adapter->priv_num; i++) {
768 priv = adapter->priv[i];
769 priv->usb_port = active_port;
770 }
771 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
772 if (active_port == card->port[i].tx_data_ep)
773 card->port[i].block_status = false;
774 else
775 card->port[i].block_status = true;
776 }
777 }
778 }
779
mwifiex_usb_is_port_ready(struct mwifiex_private * priv)780 static bool mwifiex_usb_is_port_ready(struct mwifiex_private *priv)
781 {
782 struct usb_card_rec *card = priv->adapter->card;
783 int idx;
784
785 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
786 if (priv->usb_port == card->port[idx].tx_data_ep)
787 return !card->port[idx].block_status;
788 }
789
790 return false;
791 }
792
mwifiex_usb_data_sent(struct mwifiex_adapter * adapter)793 static inline u8 mwifiex_usb_data_sent(struct mwifiex_adapter *adapter)
794 {
795 struct usb_card_rec *card = adapter->card;
796 int i;
797
798 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++)
799 if (!card->port[i].block_status)
800 return false;
801
802 return true;
803 }
804
mwifiex_usb_construct_send_urb(struct mwifiex_adapter * adapter,struct usb_tx_data_port * port,u8 ep,struct urb_context * context,struct sk_buff * skb_send)805 static int mwifiex_usb_construct_send_urb(struct mwifiex_adapter *adapter,
806 struct usb_tx_data_port *port, u8 ep,
807 struct urb_context *context,
808 struct sk_buff *skb_send)
809 {
810 struct usb_card_rec *card = adapter->card;
811 int ret = -EINPROGRESS;
812 struct urb *tx_urb;
813
814 context->adapter = adapter;
815 context->ep = ep;
816 context->skb = skb_send;
817 tx_urb = context->urb;
818
819 if (ep == card->tx_cmd_ep &&
820 card->tx_cmd_ep_type == USB_ENDPOINT_XFER_INT)
821 usb_fill_int_urb(tx_urb, card->udev,
822 usb_sndintpipe(card->udev, ep), skb_send->data,
823 skb_send->len, mwifiex_usb_tx_complete,
824 (void *)context, card->tx_cmd_interval);
825 else
826 usb_fill_bulk_urb(tx_urb, card->udev,
827 usb_sndbulkpipe(card->udev, ep),
828 skb_send->data, skb_send->len,
829 mwifiex_usb_tx_complete, (void *)context);
830
831 tx_urb->transfer_flags |= URB_ZERO_PACKET;
832
833 if (ep == card->tx_cmd_ep)
834 atomic_inc(&card->tx_cmd_urb_pending);
835 else
836 atomic_inc(&port->tx_data_urb_pending);
837
838 if (ep != card->tx_cmd_ep &&
839 atomic_read(&port->tx_data_urb_pending) ==
840 MWIFIEX_TX_DATA_URB) {
841 port->block_status = true;
842 adapter->data_sent = mwifiex_usb_data_sent(adapter);
843 ret = -ENOSR;
844 }
845
846 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
847 mwifiex_dbg(adapter, ERROR,
848 "%s: usb_submit_urb failed\n", __func__);
849 if (ep == card->tx_cmd_ep) {
850 atomic_dec(&card->tx_cmd_urb_pending);
851 } else {
852 atomic_dec(&port->tx_data_urb_pending);
853 port->block_status = false;
854 adapter->data_sent = false;
855 if (port->tx_data_ix)
856 port->tx_data_ix--;
857 else
858 port->tx_data_ix = MWIFIEX_TX_DATA_URB;
859 }
860 ret = -1;
861 }
862
863 return ret;
864 }
865
mwifiex_usb_prepare_tx_aggr_skb(struct mwifiex_adapter * adapter,struct usb_tx_data_port * port,struct sk_buff ** skb_send)866 static int mwifiex_usb_prepare_tx_aggr_skb(struct mwifiex_adapter *adapter,
867 struct usb_tx_data_port *port,
868 struct sk_buff **skb_send)
869 {
870 struct sk_buff *skb_aggr, *skb_tmp;
871 u8 *payload, pad;
872 u16 align = adapter->bus_aggr.tx_aggr_align;
873 struct mwifiex_txinfo *tx_info = NULL;
874 bool is_txinfo_set = false;
875
876 /* Packets in aggr_list will be send in either skb_aggr or
877 * write complete, delete the tx_aggr timer
878 */
879 if (port->tx_aggr.timer_cnxt.is_hold_timer_set) {
880 del_timer(&port->tx_aggr.timer_cnxt.hold_timer);
881 port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
882 port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
883 }
884
885 skb_aggr = mwifiex_alloc_dma_align_buf(port->tx_aggr.aggr_len,
886 GFP_ATOMIC);
887 if (!skb_aggr) {
888 mwifiex_dbg(adapter, ERROR,
889 "%s: alloc skb_aggr failed\n", __func__);
890
891 while ((skb_tmp = skb_dequeue(&port->tx_aggr.aggr_list)))
892 mwifiex_write_data_complete(adapter, skb_tmp, 0, -1);
893
894 port->tx_aggr.aggr_num = 0;
895 port->tx_aggr.aggr_len = 0;
896 return -EBUSY;
897 }
898
899 tx_info = MWIFIEX_SKB_TXCB(skb_aggr);
900 memset(tx_info, 0, sizeof(*tx_info));
901
902 while ((skb_tmp = skb_dequeue(&port->tx_aggr.aggr_list))) {
903 /* padding for aligning next packet header*/
904 pad = (align - (skb_tmp->len & (align - 1))) % align;
905 payload = skb_put(skb_aggr, skb_tmp->len + pad);
906 memcpy(payload, skb_tmp->data, skb_tmp->len);
907 if (skb_queue_empty(&port->tx_aggr.aggr_list)) {
908 /* do not padding for last packet*/
909 *(__le16 *)payload = cpu_to_le16(skb_tmp->len);
910 *(__le16 *)&payload[2] =
911 cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2 | 0x80);
912 skb_trim(skb_aggr, skb_aggr->len - pad);
913 } else {
914 /* add aggregation interface header */
915 *(__le16 *)payload = cpu_to_le16(skb_tmp->len + pad);
916 *(__le16 *)&payload[2] =
917 cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2);
918 }
919
920 if (!is_txinfo_set) {
921 tx_info->bss_num = MWIFIEX_SKB_TXCB(skb_tmp)->bss_num;
922 tx_info->bss_type = MWIFIEX_SKB_TXCB(skb_tmp)->bss_type;
923 is_txinfo_set = true;
924 }
925
926 port->tx_aggr.aggr_num--;
927 port->tx_aggr.aggr_len -= (skb_tmp->len + pad);
928 mwifiex_write_data_complete(adapter, skb_tmp, 0, 0);
929 }
930
931 tx_info->pkt_len = skb_aggr->len -
932 (sizeof(struct txpd) + adapter->intf_hdr_len);
933 tx_info->flags |= MWIFIEX_BUF_FLAG_AGGR_PKT;
934
935 port->tx_aggr.aggr_num = 0;
936 port->tx_aggr.aggr_len = 0;
937 *skb_send = skb_aggr;
938
939 return 0;
940 }
941
942 /* This function prepare data packet to be send under usb tx aggregation
943 * protocol, check current usb aggregation status, link packet to aggrgation
944 * list if possible, work flow as below:
945 * (1) if only 1 packet available, add usb tx aggregation header and send.
946 * (2) if packet is able to aggregated, link it to current aggregation list.
947 * (3) if packet is not able to aggregated, aggregate and send exist packets
948 * in aggrgation list. Then, link packet in the list if there is more
949 * packet in transmit queue, otherwise try to transmit single packet.
950 */
mwifiex_usb_aggr_tx_data(struct mwifiex_adapter * adapter,u8 ep,struct sk_buff * skb,struct mwifiex_tx_param * tx_param,struct usb_tx_data_port * port)951 static int mwifiex_usb_aggr_tx_data(struct mwifiex_adapter *adapter, u8 ep,
952 struct sk_buff *skb,
953 struct mwifiex_tx_param *tx_param,
954 struct usb_tx_data_port *port)
955 {
956 u8 *payload, pad;
957 u16 align = adapter->bus_aggr.tx_aggr_align;
958 struct sk_buff *skb_send = NULL;
959 struct urb_context *context = NULL;
960 struct txpd *local_tx_pd =
961 (struct txpd *)((u8 *)skb->data + adapter->intf_hdr_len);
962 u8 f_send_aggr_buf = 0;
963 u8 f_send_cur_buf = 0;
964 u8 f_precopy_cur_buf = 0;
965 u8 f_postcopy_cur_buf = 0;
966 u32 timeout;
967 int ret;
968
969 /* padding to ensure each packet alginment */
970 pad = (align - (skb->len & (align - 1))) % align;
971
972 if (tx_param && tx_param->next_pkt_len) {
973 /* next packet available in tx queue*/
974 if (port->tx_aggr.aggr_len + skb->len + pad >
975 adapter->bus_aggr.tx_aggr_max_size) {
976 f_send_aggr_buf = 1;
977 f_postcopy_cur_buf = 1;
978 } else {
979 /* current packet could be aggregated*/
980 f_precopy_cur_buf = 1;
981
982 if (port->tx_aggr.aggr_len + skb->len + pad +
983 tx_param->next_pkt_len >
984 adapter->bus_aggr.tx_aggr_max_size ||
985 port->tx_aggr.aggr_num + 2 >
986 adapter->bus_aggr.tx_aggr_max_num) {
987 /* next packet could not be aggregated
988 * send current aggregation buffer
989 */
990 f_send_aggr_buf = 1;
991 }
992 }
993 } else {
994 /* last packet in tx queue */
995 if (port->tx_aggr.aggr_num > 0) {
996 /* pending packets in aggregation buffer*/
997 if (port->tx_aggr.aggr_len + skb->len + pad >
998 adapter->bus_aggr.tx_aggr_max_size) {
999 /* current packet not be able to aggregated,
1000 * send aggr buffer first, then send packet.
1001 */
1002 f_send_cur_buf = 1;
1003 } else {
1004 /* last packet, Aggregation and send */
1005 f_precopy_cur_buf = 1;
1006 }
1007
1008 f_send_aggr_buf = 1;
1009 } else {
1010 /* no pending packets in aggregation buffer,
1011 * send current packet immediately
1012 */
1013 f_send_cur_buf = 1;
1014 }
1015 }
1016
1017 if (local_tx_pd->flags & MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET) {
1018 /* Send NULL packet immediately*/
1019 if (f_precopy_cur_buf) {
1020 if (skb_queue_empty(&port->tx_aggr.aggr_list)) {
1021 f_precopy_cur_buf = 0;
1022 f_send_aggr_buf = 0;
1023 f_send_cur_buf = 1;
1024 } else {
1025 f_send_aggr_buf = 1;
1026 }
1027 } else if (f_postcopy_cur_buf) {
1028 f_send_cur_buf = 1;
1029 f_postcopy_cur_buf = 0;
1030 }
1031 }
1032
1033 if (f_precopy_cur_buf) {
1034 skb_queue_tail(&port->tx_aggr.aggr_list, skb);
1035 port->tx_aggr.aggr_len += (skb->len + pad);
1036 port->tx_aggr.aggr_num++;
1037 if (f_send_aggr_buf)
1038 goto send_aggr_buf;
1039
1040 /* packet will not been send immediately,
1041 * set a timer to make sure it will be sent under
1042 * strict time limit. Dynamically fit the timeout
1043 * value, according to packets number in aggr_list
1044 */
1045 if (!port->tx_aggr.timer_cnxt.is_hold_timer_set) {
1046 port->tx_aggr.timer_cnxt.hold_tmo_msecs =
1047 MWIFIEX_USB_TX_AGGR_TMO_MIN;
1048 timeout =
1049 port->tx_aggr.timer_cnxt.hold_tmo_msecs;
1050 mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
1051 jiffies + msecs_to_jiffies(timeout));
1052 port->tx_aggr.timer_cnxt.is_hold_timer_set = true;
1053 } else {
1054 if (port->tx_aggr.timer_cnxt.hold_tmo_msecs <
1055 MWIFIEX_USB_TX_AGGR_TMO_MAX) {
1056 /* Dyanmic fit timeout */
1057 timeout =
1058 ++port->tx_aggr.timer_cnxt.hold_tmo_msecs;
1059 mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
1060 jiffies + msecs_to_jiffies(timeout));
1061 }
1062 }
1063 }
1064
1065 send_aggr_buf:
1066 if (f_send_aggr_buf) {
1067 ret = mwifiex_usb_prepare_tx_aggr_skb(adapter, port, &skb_send);
1068 if (!ret) {
1069 context = &port->tx_data_list[port->tx_data_ix++];
1070 ret = mwifiex_usb_construct_send_urb(adapter, port, ep,
1071 context, skb_send);
1072 if (ret == -1)
1073 mwifiex_write_data_complete(adapter, skb_send,
1074 0, -1);
1075 }
1076 }
1077
1078 if (f_send_cur_buf) {
1079 if (f_send_aggr_buf) {
1080 if (atomic_read(&port->tx_data_urb_pending) >=
1081 MWIFIEX_TX_DATA_URB) {
1082 port->block_status = true;
1083 adapter->data_sent =
1084 mwifiex_usb_data_sent(adapter);
1085 /* no available urb, postcopy packet*/
1086 f_postcopy_cur_buf = 1;
1087 goto postcopy_cur_buf;
1088 }
1089
1090 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
1091 port->tx_data_ix = 0;
1092 }
1093
1094 payload = skb->data;
1095 *(__le16 *)&payload[2] =
1096 cpu_to_le16(MWIFIEX_TYPE_AGGR_DATA_V2 | 0x80);
1097 *(__le16 *)payload = cpu_to_le16(skb->len);
1098 skb_send = skb;
1099 context = &port->tx_data_list[port->tx_data_ix++];
1100 return mwifiex_usb_construct_send_urb(adapter, port, ep,
1101 context, skb_send);
1102 }
1103
1104 postcopy_cur_buf:
1105 if (f_postcopy_cur_buf) {
1106 skb_queue_tail(&port->tx_aggr.aggr_list, skb);
1107 port->tx_aggr.aggr_len += (skb->len + pad);
1108 port->tx_aggr.aggr_num++;
1109 /* New aggregation begin, start timer */
1110 if (!port->tx_aggr.timer_cnxt.is_hold_timer_set) {
1111 port->tx_aggr.timer_cnxt.hold_tmo_msecs =
1112 MWIFIEX_USB_TX_AGGR_TMO_MIN;
1113 timeout = port->tx_aggr.timer_cnxt.hold_tmo_msecs;
1114 mod_timer(&port->tx_aggr.timer_cnxt.hold_timer,
1115 jiffies + msecs_to_jiffies(timeout));
1116 port->tx_aggr.timer_cnxt.is_hold_timer_set = true;
1117 }
1118 }
1119
1120 return -EINPROGRESS;
1121 }
1122
mwifiex_usb_tx_aggr_tmo(struct timer_list * t)1123 static void mwifiex_usb_tx_aggr_tmo(struct timer_list *t)
1124 {
1125 struct urb_context *urb_cnxt = NULL;
1126 struct sk_buff *skb_send = NULL;
1127 struct tx_aggr_tmr_cnxt *timer_context =
1128 from_timer(timer_context, t, hold_timer);
1129 struct mwifiex_adapter *adapter = timer_context->adapter;
1130 struct usb_tx_data_port *port = timer_context->port;
1131 int err = 0;
1132
1133 spin_lock_bh(&port->tx_aggr_lock);
1134 err = mwifiex_usb_prepare_tx_aggr_skb(adapter, port, &skb_send);
1135 if (err) {
1136 mwifiex_dbg(adapter, ERROR,
1137 "prepare tx aggr skb failed, err=%d\n", err);
1138 goto unlock;
1139 }
1140
1141 if (atomic_read(&port->tx_data_urb_pending) >=
1142 MWIFIEX_TX_DATA_URB) {
1143 port->block_status = true;
1144 adapter->data_sent =
1145 mwifiex_usb_data_sent(adapter);
1146 err = -1;
1147 goto done;
1148 }
1149
1150 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
1151 port->tx_data_ix = 0;
1152
1153 urb_cnxt = &port->tx_data_list[port->tx_data_ix++];
1154 err = mwifiex_usb_construct_send_urb(adapter, port, port->tx_data_ep,
1155 urb_cnxt, skb_send);
1156 done:
1157 if (err == -1)
1158 mwifiex_write_data_complete(adapter, skb_send, 0, -1);
1159 unlock:
1160 spin_unlock_bh(&port->tx_aggr_lock);
1161 }
1162
1163 /* This function write a command/data packet to card. */
mwifiex_usb_host_to_card(struct mwifiex_adapter * adapter,u8 ep,struct sk_buff * skb,struct mwifiex_tx_param * tx_param)1164 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
1165 struct sk_buff *skb,
1166 struct mwifiex_tx_param *tx_param)
1167 {
1168 struct usb_card_rec *card = adapter->card;
1169 struct urb_context *context = NULL;
1170 struct usb_tx_data_port *port = NULL;
1171 int idx, ret;
1172
1173 if (test_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags)) {
1174 mwifiex_dbg(adapter, ERROR,
1175 "%s: not allowed while suspended\n", __func__);
1176 return -1;
1177 }
1178
1179 if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags)) {
1180 mwifiex_dbg(adapter, ERROR, "%s: device removed\n", __func__);
1181 return -1;
1182 }
1183
1184 mwifiex_dbg(adapter, INFO, "%s: ep=%d\n", __func__, ep);
1185
1186 if (ep == card->tx_cmd_ep) {
1187 context = &card->tx_cmd;
1188 } else {
1189 /* get the data port structure for endpoint */
1190 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
1191 if (ep == card->port[idx].tx_data_ep) {
1192 port = &card->port[idx];
1193 if (atomic_read(&port->tx_data_urb_pending)
1194 >= MWIFIEX_TX_DATA_URB) {
1195 port->block_status = true;
1196 adapter->data_sent =
1197 mwifiex_usb_data_sent(adapter);
1198 return -EBUSY;
1199 }
1200 if (port->tx_data_ix >= MWIFIEX_TX_DATA_URB)
1201 port->tx_data_ix = 0;
1202 break;
1203 }
1204 }
1205
1206 if (!port) {
1207 mwifiex_dbg(adapter, ERROR, "Wrong usb tx data port\n");
1208 return -1;
1209 }
1210
1211 if (adapter->bus_aggr.enable) {
1212 spin_lock_bh(&port->tx_aggr_lock);
1213 ret = mwifiex_usb_aggr_tx_data(adapter, ep, skb,
1214 tx_param, port);
1215 spin_unlock_bh(&port->tx_aggr_lock);
1216 return ret;
1217 }
1218
1219 context = &port->tx_data_list[port->tx_data_ix++];
1220 }
1221
1222 return mwifiex_usb_construct_send_urb(adapter, port, ep, context, skb);
1223 }
1224
mwifiex_usb_tx_init(struct mwifiex_adapter * adapter)1225 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
1226 {
1227 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1228 struct usb_tx_data_port *port;
1229 int i, j;
1230
1231 card->tx_cmd.adapter = adapter;
1232 card->tx_cmd.ep = card->tx_cmd_ep;
1233
1234 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
1235 if (!card->tx_cmd.urb)
1236 return -ENOMEM;
1237
1238 for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) {
1239 port = &card->port[i];
1240 if (!port->tx_data_ep)
1241 continue;
1242 port->tx_data_ix = 0;
1243 skb_queue_head_init(&port->tx_aggr.aggr_list);
1244 if (port->tx_data_ep == MWIFIEX_USB_EP_DATA)
1245 port->block_status = false;
1246 else
1247 port->block_status = true;
1248 for (j = 0; j < MWIFIEX_TX_DATA_URB; j++) {
1249 port->tx_data_list[j].adapter = adapter;
1250 port->tx_data_list[j].ep = port->tx_data_ep;
1251 port->tx_data_list[j].urb =
1252 usb_alloc_urb(0, GFP_KERNEL);
1253 if (!port->tx_data_list[j].urb)
1254 return -ENOMEM;
1255 }
1256
1257 port->tx_aggr.timer_cnxt.adapter = adapter;
1258 port->tx_aggr.timer_cnxt.port = port;
1259 port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
1260 port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
1261 timer_setup(&port->tx_aggr.timer_cnxt.hold_timer,
1262 mwifiex_usb_tx_aggr_tmo, 0);
1263 }
1264
1265 return 0;
1266 }
1267
mwifiex_usb_rx_init(struct mwifiex_adapter * adapter)1268 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
1269 {
1270 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1271 int i;
1272
1273 card->rx_cmd.adapter = adapter;
1274 card->rx_cmd.ep = card->rx_cmd_ep;
1275
1276 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
1277 if (!card->rx_cmd.urb)
1278 return -ENOMEM;
1279
1280 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
1281 if (!card->rx_cmd.skb)
1282 return -ENOMEM;
1283
1284 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
1285 return -1;
1286
1287 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1288 card->rx_data_list[i].adapter = adapter;
1289 card->rx_data_list[i].ep = card->rx_data_ep;
1290
1291 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
1292 if (!card->rx_data_list[i].urb)
1293 return -1;
1294 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
1295 MWIFIEX_RX_DATA_BUF_SIZE))
1296 return -1;
1297 }
1298
1299 return 0;
1300 }
1301
1302 /* This function register usb device and initialize parameter. */
mwifiex_register_dev(struct mwifiex_adapter * adapter)1303 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1304 {
1305 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1306
1307 card->adapter = adapter;
1308
1309 switch (le16_to_cpu(card->udev->descriptor.idProduct)) {
1310 case USB8997_PID_1:
1311 case USB8997_PID_2:
1312 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
1313 strcpy(adapter->fw_name, USB8997_DEFAULT_FW_NAME);
1314 adapter->ext_scan = true;
1315 break;
1316 case USB8766_PID_1:
1317 case USB8766_PID_2:
1318 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
1319 strcpy(adapter->fw_name, USB8766_DEFAULT_FW_NAME);
1320 adapter->ext_scan = true;
1321 break;
1322 case USB8801_PID_1:
1323 case USB8801_PID_2:
1324 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
1325 strcpy(adapter->fw_name, USB8801_DEFAULT_FW_NAME);
1326 adapter->ext_scan = false;
1327 break;
1328 case USB8797_PID_1:
1329 case USB8797_PID_2:
1330 default:
1331 adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
1332 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
1333 break;
1334 }
1335
1336 adapter->usb_mc_status = false;
1337 adapter->usb_mc_setup = false;
1338
1339 return 0;
1340 }
1341
mwifiex_usb_cleanup_tx_aggr(struct mwifiex_adapter * adapter)1342 static void mwifiex_usb_cleanup_tx_aggr(struct mwifiex_adapter *adapter)
1343 {
1344 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1345 struct usb_tx_data_port *port;
1346 struct sk_buff *skb_tmp;
1347 int idx;
1348
1349 for (idx = 0; idx < MWIFIEX_TX_DATA_PORT; idx++) {
1350 port = &card->port[idx];
1351 if (adapter->bus_aggr.enable)
1352 while ((skb_tmp =
1353 skb_dequeue(&port->tx_aggr.aggr_list)))
1354 mwifiex_write_data_complete(adapter, skb_tmp,
1355 0, -1);
1356 if (port->tx_aggr.timer_cnxt.hold_timer.function)
1357 del_timer_sync(&port->tx_aggr.timer_cnxt.hold_timer);
1358 port->tx_aggr.timer_cnxt.is_hold_timer_set = false;
1359 port->tx_aggr.timer_cnxt.hold_tmo_msecs = 0;
1360 }
1361 }
1362
mwifiex_unregister_dev(struct mwifiex_adapter * adapter)1363 static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1364 {
1365 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1366
1367 mwifiex_usb_free(card);
1368
1369 mwifiex_usb_cleanup_tx_aggr(adapter);
1370
1371 card->adapter = NULL;
1372 }
1373
mwifiex_prog_fw_w_helper(struct mwifiex_adapter * adapter,struct mwifiex_fw_image * fw)1374 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
1375 struct mwifiex_fw_image *fw)
1376 {
1377 int ret = 0;
1378 u8 *firmware = fw->fw_buf, *recv_buff;
1379 u32 retries = USB8XXX_FW_MAX_RETRY + 1;
1380 u32 dlen;
1381 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
1382 struct fw_data *fwdata;
1383 struct fw_sync_header sync_fw;
1384 u8 check_winner = 1;
1385
1386 if (!firmware) {
1387 mwifiex_dbg(adapter, ERROR,
1388 "No firmware image found! Terminating download\n");
1389 ret = -1;
1390 goto fw_exit;
1391 }
1392
1393 /* Allocate memory for transmit */
1394 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
1395 if (!fwdata) {
1396 ret = -ENOMEM;
1397 goto fw_exit;
1398 }
1399
1400 /* Allocate memory for receive */
1401 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1402 if (!recv_buff) {
1403 ret = -ENOMEM;
1404 goto cleanup;
1405 }
1406
1407 do {
1408 /* Send pseudo data to check winner status first */
1409 if (check_winner) {
1410 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1411 dlen = 0;
1412 } else {
1413 /* copy the header of the fw_data to get the length */
1414 memcpy(&fwdata->fw_hdr, &firmware[tlen],
1415 sizeof(struct fw_header));
1416
1417 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1418 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1419 tlen += sizeof(struct fw_header);
1420
1421 /* Command 7 doesn't have data length field */
1422 if (dnld_cmd == FW_CMD_7)
1423 dlen = 0;
1424
1425 memcpy(fwdata->data, &firmware[tlen], dlen);
1426
1427 fwdata->seq_num = cpu_to_le32(fw_seqnum);
1428 tlen += dlen;
1429 }
1430
1431 /* If the send/receive fails or CRC occurs then retry */
1432 while (--retries) {
1433 u8 *buf = (u8 *)fwdata;
1434 u32 len = FW_DATA_XMIT_SIZE;
1435
1436 /* send the firmware block */
1437 ret = mwifiex_write_data_sync(adapter, buf, &len,
1438 MWIFIEX_USB_EP_CMD_EVENT,
1439 MWIFIEX_USB_TIMEOUT);
1440 if (ret) {
1441 mwifiex_dbg(adapter, ERROR,
1442 "write_data_sync: failed: %d\n",
1443 ret);
1444 continue;
1445 }
1446
1447 buf = recv_buff;
1448 len = FW_DNLD_RX_BUF_SIZE;
1449
1450 /* Receive the firmware block response */
1451 ret = mwifiex_read_data_sync(adapter, buf, &len,
1452 MWIFIEX_USB_EP_CMD_EVENT,
1453 MWIFIEX_USB_TIMEOUT);
1454 if (ret) {
1455 mwifiex_dbg(adapter, ERROR,
1456 "read_data_sync: failed: %d\n",
1457 ret);
1458 continue;
1459 }
1460
1461 memcpy(&sync_fw, recv_buff,
1462 sizeof(struct fw_sync_header));
1463
1464 /* check 1st firmware block resp for highest bit set */
1465 if (check_winner) {
1466 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1467 mwifiex_dbg(adapter, WARN,
1468 "USB is not the winner %#x\n",
1469 sync_fw.cmd);
1470
1471 /* returning success */
1472 ret = 0;
1473 goto cleanup;
1474 }
1475
1476 mwifiex_dbg(adapter, MSG,
1477 "start to download FW...\n");
1478
1479 check_winner = 0;
1480 break;
1481 }
1482
1483 /* check the firmware block response for CRC errors */
1484 if (sync_fw.cmd) {
1485 mwifiex_dbg(adapter, ERROR,
1486 "FW received block with CRC %#x\n",
1487 sync_fw.cmd);
1488 ret = -1;
1489 continue;
1490 }
1491
1492 retries = USB8XXX_FW_MAX_RETRY + 1;
1493 break;
1494 }
1495 fw_seqnum++;
1496 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1497
1498 cleanup:
1499 mwifiex_dbg(adapter, MSG,
1500 "info: FW download over, size %d bytes\n", tlen);
1501
1502 kfree(recv_buff);
1503 kfree(fwdata);
1504
1505 if (retries)
1506 ret = 0;
1507 fw_exit:
1508 return ret;
1509 }
1510
mwifiex_usb_dnld_fw(struct mwifiex_adapter * adapter,struct mwifiex_fw_image * fw)1511 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1512 struct mwifiex_fw_image *fw)
1513 {
1514 int ret;
1515 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1516
1517 if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1518 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1519 if (ret)
1520 return -1;
1521
1522 /* Boot state changes after successful firmware download */
1523 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1524 return -1;
1525 }
1526
1527 ret = mwifiex_usb_rx_init(adapter);
1528 if (!ret)
1529 ret = mwifiex_usb_tx_init(adapter);
1530
1531 return ret;
1532 }
1533
mwifiex_submit_rx_urb(struct mwifiex_adapter * adapter,u8 ep)1534 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1535 {
1536 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1537
1538 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1539 if ((ep == card->rx_cmd_ep) &&
1540 (!atomic_read(&card->rx_cmd_urb_pending)))
1541 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1542 MWIFIEX_RX_CMD_BUF_SIZE);
1543
1544 return;
1545 }
1546
mwifiex_usb_cmd_event_complete(struct mwifiex_adapter * adapter,struct sk_buff * skb)1547 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1548 struct sk_buff *skb)
1549 {
1550 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1551
1552 return 0;
1553 }
1554
1555 /* This function wakes up the card. */
mwifiex_pm_wakeup_card(struct mwifiex_adapter * adapter)1556 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1557 {
1558 /* Simulation of HS_AWAKE event */
1559 adapter->pm_wakeup_fw_try = false;
1560 del_timer(&adapter->wakeup_timer);
1561 adapter->pm_wakeup_card_req = false;
1562 adapter->ps_state = PS_STATE_AWAKE;
1563
1564 return 0;
1565 }
1566
mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter * adapter)1567 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1568 {
1569 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1570 int i;
1571 struct urb_context *ctx;
1572
1573 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1574 if (card->rx_data_list[i].skb)
1575 continue;
1576 ctx = &card->rx_data_list[i];
1577 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1578 }
1579 }
1580
1581 /* This function is called after the card has woken up. */
1582 static inline int
mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter * adapter)1583 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1584 {
1585 return 0;
1586 }
1587
1588 static struct mwifiex_if_ops usb_ops = {
1589 .register_dev = mwifiex_register_dev,
1590 .unregister_dev = mwifiex_unregister_dev,
1591 .wakeup = mwifiex_pm_wakeup_card,
1592 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1593
1594 /* USB specific */
1595 .dnld_fw = mwifiex_usb_dnld_fw,
1596 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
1597 .event_complete = mwifiex_usb_cmd_event_complete,
1598 .host_to_card = mwifiex_usb_host_to_card,
1599 .submit_rem_rx_urbs = mwifiex_usb_submit_rem_rx_urbs,
1600 .multi_port_resync = mwifiex_usb_port_resync,
1601 .is_port_ready = mwifiex_usb_is_port_ready,
1602 };
1603
1604 module_usb_driver(mwifiex_usb_driver);
1605
1606 MODULE_AUTHOR("Marvell International Ltd.");
1607 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1608 MODULE_VERSION(USB_VERSION);
1609 MODULE_LICENSE("GPL v2");
1610 MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
1611 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1612 MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
1613 MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);
1614