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vfio/pci: Fix typos in comments
[deliverable/linux.git] / drivers / net / wireless / marvell / 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 + 1;
999 u32 dlen;
1000 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
1001 struct fw_data *fwdata;
1002 struct fw_sync_header sync_fw;
1003 u8 check_winner = 1;
1004
1005 if (!firmware) {
1006 mwifiex_dbg(adapter, ERROR,
1007 "No firmware image found! Terminating download\n");
1008 ret = -1;
1009 goto fw_exit;
1010 }
1011
1012 /* Allocate memory for transmit */
1013 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
1014 if (!fwdata) {
1015 ret = -ENOMEM;
1016 goto fw_exit;
1017 }
1018
1019 /* Allocate memory for receive */
1020 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
1021 if (!recv_buff) {
1022 ret = -ENOMEM;
1023 goto cleanup;
1024 }
1025
1026 do {
1027 /* Send pseudo data to check winner status first */
1028 if (check_winner) {
1029 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
1030 dlen = 0;
1031 } else {
1032 /* copy the header of the fw_data to get the length */
1033 memcpy(&fwdata->fw_hdr, &firmware[tlen],
1034 sizeof(struct fw_header));
1035
1036 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
1037 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
1038 tlen += sizeof(struct fw_header);
1039
1040 memcpy(fwdata->data, &firmware[tlen], dlen);
1041
1042 fwdata->seq_num = cpu_to_le32(fw_seqnum);
1043 tlen += dlen;
1044 }
1045
1046 /* If the send/receive fails or CRC occurs then retry */
1047 while (--retries) {
1048 u8 *buf = (u8 *)fwdata;
1049 u32 len = FW_DATA_XMIT_SIZE;
1050
1051 /* send the firmware block */
1052 ret = mwifiex_write_data_sync(adapter, buf, &len,
1053 MWIFIEX_USB_EP_CMD_EVENT,
1054 MWIFIEX_USB_TIMEOUT);
1055 if (ret) {
1056 mwifiex_dbg(adapter, ERROR,
1057 "write_data_sync: failed: %d\n",
1058 ret);
1059 continue;
1060 }
1061
1062 buf = recv_buff;
1063 len = FW_DNLD_RX_BUF_SIZE;
1064
1065 /* Receive the firmware block response */
1066 ret = mwifiex_read_data_sync(adapter, buf, &len,
1067 MWIFIEX_USB_EP_CMD_EVENT,
1068 MWIFIEX_USB_TIMEOUT);
1069 if (ret) {
1070 mwifiex_dbg(adapter, ERROR,
1071 "read_data_sync: failed: %d\n",
1072 ret);
1073 continue;
1074 }
1075
1076 memcpy(&sync_fw, recv_buff,
1077 sizeof(struct fw_sync_header));
1078
1079 /* check 1st firmware block resp for highest bit set */
1080 if (check_winner) {
1081 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
1082 mwifiex_dbg(adapter, WARN,
1083 "USB is not the winner %#x\n",
1084 sync_fw.cmd);
1085
1086 /* returning success */
1087 ret = 0;
1088 goto cleanup;
1089 }
1090
1091 mwifiex_dbg(adapter, MSG,
1092 "start to download FW...\n");
1093
1094 check_winner = 0;
1095 break;
1096 }
1097
1098 /* check the firmware block response for CRC errors */
1099 if (sync_fw.cmd) {
1100 mwifiex_dbg(adapter, ERROR,
1101 "FW received block with CRC %#x\n",
1102 sync_fw.cmd);
1103 ret = -1;
1104 continue;
1105 }
1106
1107 retries = USB8XXX_FW_MAX_RETRY + 1;
1108 break;
1109 }
1110 fw_seqnum++;
1111 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
1112
1113 cleanup:
1114 mwifiex_dbg(adapter, MSG,
1115 "info: FW download over, size %d bytes\n", tlen);
1116
1117 kfree(recv_buff);
1118 kfree(fwdata);
1119
1120 if (retries)
1121 ret = 0;
1122 fw_exit:
1123 return ret;
1124 }
1125
1126 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
1127 struct mwifiex_fw_image *fw)
1128 {
1129 int ret;
1130 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1131
1132 if (card->usb_boot_state == USB8XXX_FW_DNLD) {
1133 ret = mwifiex_prog_fw_w_helper(adapter, fw);
1134 if (ret)
1135 return -1;
1136
1137 /* Boot state changes after successful firmware download */
1138 if (card->usb_boot_state == USB8XXX_FW_DNLD)
1139 return -1;
1140 }
1141
1142 ret = mwifiex_usb_rx_init(adapter);
1143 if (!ret)
1144 ret = mwifiex_usb_tx_init(adapter);
1145
1146 return ret;
1147 }
1148
1149 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
1150 {
1151 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1152
1153 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
1154 if ((ep == card->rx_cmd_ep) &&
1155 (!atomic_read(&card->rx_cmd_urb_pending)))
1156 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
1157 MWIFIEX_RX_CMD_BUF_SIZE);
1158
1159 return;
1160 }
1161
1162 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
1163 struct sk_buff *skb)
1164 {
1165 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
1166
1167 return 0;
1168 }
1169
1170 /* This function wakes up the card. */
1171 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
1172 {
1173 /* Simulation of HS_AWAKE event */
1174 adapter->pm_wakeup_fw_try = false;
1175 del_timer(&adapter->wakeup_timer);
1176 adapter->pm_wakeup_card_req = false;
1177 adapter->ps_state = PS_STATE_AWAKE;
1178
1179 return 0;
1180 }
1181
1182 static void mwifiex_usb_submit_rem_rx_urbs(struct mwifiex_adapter *adapter)
1183 {
1184 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
1185 int i;
1186 struct urb_context *ctx;
1187
1188 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
1189 if (card->rx_data_list[i].skb)
1190 continue;
1191 ctx = &card->rx_data_list[i];
1192 mwifiex_usb_submit_rx_urb(ctx, MWIFIEX_RX_DATA_BUF_SIZE);
1193 }
1194 }
1195
1196 /* This function is called after the card has woken up. */
1197 static inline int
1198 mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
1199 {
1200 return 0;
1201 }
1202
1203 static struct mwifiex_if_ops usb_ops = {
1204 .register_dev = mwifiex_register_dev,
1205 .unregister_dev = mwifiex_unregister_dev,
1206 .wakeup = mwifiex_pm_wakeup_card,
1207 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1208
1209 /* USB specific */
1210 .dnld_fw = mwifiex_usb_dnld_fw,
1211 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
1212 .event_complete = mwifiex_usb_cmd_event_complete,
1213 .host_to_card = mwifiex_usb_host_to_card,
1214 .submit_rem_rx_urbs = mwifiex_usb_submit_rem_rx_urbs,
1215 .multi_port_resync = mwifiex_usb_port_resync,
1216 .is_port_ready = mwifiex_usb_is_port_ready,
1217 };
1218
1219 /* This function initializes the USB driver module.
1220 *
1221 * This initiates the semaphore and registers the device with
1222 * USB bus.
1223 */
1224 static int mwifiex_usb_init_module(void)
1225 {
1226 int ret;
1227
1228 pr_debug("Marvell USB8797 Driver\n");
1229
1230 sema_init(&add_remove_card_sem, 1);
1231
1232 ret = usb_register(&mwifiex_usb_driver);
1233 if (ret)
1234 pr_err("Driver register failed!\n");
1235 else
1236 pr_debug("info: Driver registered successfully!\n");
1237
1238 return ret;
1239 }
1240
1241 /* This function cleans up the USB driver.
1242 *
1243 * The following major steps are followed in .disconnect for cleanup:
1244 * - Resume the device if its suspended
1245 * - Disconnect the device if connected
1246 * - Shutdown the firmware
1247 * - Unregister the device from USB bus.
1248 */
1249 static void mwifiex_usb_cleanup_module(void)
1250 {
1251 if (!down_interruptible(&add_remove_card_sem))
1252 up(&add_remove_card_sem);
1253
1254 /* set the flag as user is removing this module */
1255 user_rmmod = 1;
1256
1257 usb_deregister(&mwifiex_usb_driver);
1258 }
1259
1260 module_init(mwifiex_usb_init_module);
1261 module_exit(mwifiex_usb_cleanup_module);
1262
1263 MODULE_AUTHOR("Marvell International Ltd.");
1264 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1265 MODULE_VERSION(USB_VERSION);
1266 MODULE_LICENSE("GPL v2");
1267 MODULE_FIRMWARE(USB8766_DEFAULT_FW_NAME);
1268 MODULE_FIRMWARE(USB8797_DEFAULT_FW_NAME);
1269 MODULE_FIRMWARE(USB8801_DEFAULT_FW_NAME);
1270 MODULE_FIRMWARE(USB8997_DEFAULT_FW_NAME);
Linux kernel - Deliverables
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