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Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[deliverable/linux.git] / drivers / net / wireless / mwifiex / usb.c
CommitLineData
4daffe35
AK		 1/*
2 * Marvell Wireless LAN device driver: USB specific handling
3 *
4 * Copyright (C) 2012, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20#include "main.h"
21#include "usb.h"
22
23#define USB_VERSION "1.0"
24
25static const char usbdriver_name[] = "usb8797";
26
4daffe35
AK		 27static struct mwifiex_if_ops usb_ops;
28static struct semaphore add_remove_card_sem;
027d3307 29static struct usb_card_rec *usb_card;
4daffe35
AK		 30
31static struct usb_device_id mwifiex_usb_table[] = {
32 {USB_DEVICE(USB8797_VID, USB8797_PID_1)},
33 {USB_DEVICE_AND_INTERFACE_INFO(USB8797_VID, USB8797_PID_2,
34 USB_CLASS_VENDOR_SPEC,
35 USB_SUBCLASS_VENDOR_SPEC, 0xff)},
36 { } /* Terminating entry */
37};
38
39MODULE_DEVICE_TABLE(usb, mwifiex_usb_table);
40
41static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size);
42
43/* This function handles received packet. Necessary action is taken based on
44 * cmd/event/data.
45 */
46static int mwifiex_usb_recv(struct mwifiex_adapter *adapter,
47 struct sk_buff *skb, u8 ep)
48{
49 struct device *dev = adapter->dev;
50 u32 recv_type;
51 __le32 tmp;
8311f0da 52 int ret;
4daffe35
AK		 53
54 if (adapter->hs_activated)
55 mwifiex_process_hs_config(adapter);
56
57 if (skb->len < INTF_HEADER_LEN) {
58 dev_err(dev, "%s: invalid skb->len\n", __func__);
59 return -1;
60 }
61
62 switch (ep) {
63 case MWIFIEX_USB_EP_CMD_EVENT:
64 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
65 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
66 recv_type = le32_to_cpu(tmp);
67 skb_pull(skb, INTF_HEADER_LEN);
68
69 switch (recv_type) {
70 case MWIFIEX_USB_TYPE_CMD:
71 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
72 dev_err(dev, "CMD: skb->len too large\n");
8311f0da
AK		 73 ret = -1;
74 goto exit_restore_skb;
4daffe35
AK		 75 } else if (!adapter->curr_cmd) {
76 dev_dbg(dev, "CMD: no curr_cmd\n");
77 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
78 mwifiex_process_sleep_confirm_resp(
79 adapter, skb->data,
80 skb->len);
8311f0da
AK		 81 ret = 0;
82 goto exit_restore_skb;
4daffe35 83 }
8311f0da
AK		 84 ret = -1;
85 goto exit_restore_skb;
4daffe35
AK		 86 }
87
88 adapter->curr_cmd->resp_skb = skb;
89 adapter->cmd_resp_received = true;
90 break;
91 case MWIFIEX_USB_TYPE_EVENT:
92 if (skb->len < sizeof(u32)) {
93 dev_err(dev, "EVENT: skb->len too small\n");
8311f0da
AK		 94 ret = -1;
95 goto exit_restore_skb;
4daffe35
AK		 96 }
97 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
98 adapter->event_cause = le32_to_cpu(tmp);
4daffe35
AK		 99 dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
100
101 if (skb->len > MAX_EVENT_SIZE) {
102 dev_err(dev, "EVENT: event body too large\n");
8311f0da
AK		 103 ret = -1;
104 goto exit_restore_skb;
4daffe35
AK		 105 }
106
e80c81dc
AK		 107 memcpy(adapter->event_body, skb->data +
108 MWIFIEX_EVENT_HEADER_LEN, skb->len);
109
4daffe35
AK		 110 adapter->event_received = true;
111 adapter->event_skb = skb;
112 break;
113 default:
114 dev_err(dev, "unknown recv_type %#x\n", recv_type);
115 return -1;
116 }
117 break;
118 case MWIFIEX_USB_EP_DATA:
119 dev_dbg(dev, "%s: EP_DATA\n", __func__);
120 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
121 dev_err(dev, "DATA: skb->len too large\n");
122 return -1;
123 }
124 skb_queue_tail(&adapter->usb_rx_data_q, skb);
125 adapter->data_received = true;
126 break;
127 default:
128 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
129 return -1;
130 }
131
132 return -EINPROGRESS;
8311f0da
AK		 133
134exit_restore_skb:
135 /* The buffer will be reused for further cmds/events */
136 skb_push(skb, INTF_HEADER_LEN);
137
138 return ret;
4daffe35
AK		 139}
140
141static void mwifiex_usb_rx_complete(struct urb *urb)
142{
143 struct urb_context *context = (struct urb_context *)urb->context;
144 struct mwifiex_adapter *adapter = context->adapter;
145 struct sk_buff *skb = context->skb;
146 struct usb_card_rec *card;
147 int recv_length = urb->actual_length;
148 int size, status;
149
150 if (!adapter || !adapter->card) {
151 pr_err("mwifiex adapter or card structure is not valid\n");
152 return;
153 }
154
155 card = (struct usb_card_rec *)adapter->card;
156 if (card->rx_cmd_ep == context->ep)
157 atomic_dec(&card->rx_cmd_urb_pending);
158 else
159 atomic_dec(&card->rx_data_urb_pending);
160
161 if (recv_length) {
162 if (urb->status || (adapter->surprise_removed)) {
163 dev_err(adapter->dev,
164 "URB status is failed: %d\n", urb->status);
165 /* Do not free skb in case of command ep */
166 if (card->rx_cmd_ep != context->ep)
167 dev_kfree_skb_any(skb);
168 goto setup_for_next;
169 }
170 if (skb->len > recv_length)
171 skb_trim(skb, recv_length);
172 else
173 skb_put(skb, recv_length - skb->len);
174
175 atomic_inc(&adapter->rx_pending);
176 status = mwifiex_usb_recv(adapter, skb, context->ep);
177
178 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
179 recv_length, status);
180 if (status == -EINPROGRESS) {
181 queue_work(adapter->workqueue, &adapter->main_work);
182
183 /* urb for data_ep is re-submitted now;
184 * urb for cmd_ep will be re-submitted in callback
185 * mwifiex_usb_recv_complete
186 */
187 if (card->rx_cmd_ep == context->ep)
188 return;
189 } else {
190 atomic_dec(&adapter->rx_pending);
191 if (status == -1)
192 dev_err(adapter->dev,
193 "received data processing failed!\n");
194
195 /* Do not free skb in case of command ep */
196 if (card->rx_cmd_ep != context->ep)
197 dev_kfree_skb_any(skb);
198 }
199 } else if (urb->status) {
200 if (!adapter->is_suspended) {
201 dev_warn(adapter->dev,
202 "Card is removed: %d\n", urb->status);
203 adapter->surprise_removed = true;
204 }
205 dev_kfree_skb_any(skb);
206 return;
207 } else {
208 /* Do not free skb in case of command ep */
209 if (card->rx_cmd_ep != context->ep)
210 dev_kfree_skb_any(skb);
211
212 /* fall through setup_for_next */
213 }
214
215setup_for_next:
216 if (card->rx_cmd_ep == context->ep)
217 size = MWIFIEX_RX_CMD_BUF_SIZE;
218 else
219 size = MWIFIEX_RX_DATA_BUF_SIZE;
220
221 mwifiex_usb_submit_rx_urb(context, size);
222
223 return;
224}
225
226static void mwifiex_usb_tx_complete(struct urb *urb)
227{
228 struct urb_context *context = (struct urb_context *)(urb->context);
229 struct mwifiex_adapter *adapter = context->adapter;
230 struct usb_card_rec *card = adapter->card;
231
232 dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
233
234 if (context->ep == card->tx_cmd_ep) {
235 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
236 atomic_dec(&card->tx_cmd_urb_pending);
237 adapter->cmd_sent = false;
238 } else {
239 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
240 atomic_dec(&card->tx_data_urb_pending);
47411a06 241 mwifiex_write_data_complete(adapter, context->skb, 0,
4daffe35
AK		 242 urb->status ? -1 : 0);
243 }
244
245 queue_work(adapter->workqueue, &adapter->main_work);
246
247 return;
248}
249
250static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
251{
252 struct mwifiex_adapter *adapter = ctx->adapter;
253 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
254
255 if (card->rx_cmd_ep != ctx->ep) {
256 ctx->skb = dev_alloc_skb(size);
257 if (!ctx->skb) {
258 dev_err(adapter->dev,
259 "%s: dev_alloc_skb failed\n", __func__);
260 return -ENOMEM;
261 }
262 }
263
264 usb_fill_bulk_urb(ctx->urb, card->udev,
265 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
266 size, mwifiex_usb_rx_complete, (void *)ctx);
267
268 if (card->rx_cmd_ep == ctx->ep)
269 atomic_inc(&card->rx_cmd_urb_pending);
270 else
271 atomic_inc(&card->rx_data_urb_pending);
272
273 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
274 dev_err(adapter->dev, "usb_submit_urb failed\n");
275 dev_kfree_skb_any(ctx->skb);
276 ctx->skb = NULL;
277
278 if (card->rx_cmd_ep == ctx->ep)
279 atomic_dec(&card->rx_cmd_urb_pending);
280 else
281 atomic_dec(&card->rx_data_urb_pending);
282
283 return -1;
284 }
285
286 return 0;
287}
288
289static void mwifiex_usb_free(struct usb_card_rec *card)
290{
291 int i;
292
293 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
294 usb_kill_urb(card->rx_cmd.urb);
295
296 usb_free_urb(card->rx_cmd.urb);
297 card->rx_cmd.urb = NULL;
298
299 if (atomic_read(&card->rx_data_urb_pending))
300 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
301 if (card->rx_data_list[i].urb)
302 usb_kill_urb(card->rx_data_list[i].urb);
303
304 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
305 usb_free_urb(card->rx_data_list[i].urb);
306 card->rx_data_list[i].urb = NULL;
307 }
308
309 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
310 usb_free_urb(card->tx_data_list[i].urb);
311 card->tx_data_list[i].urb = NULL;
312 }
313
314 usb_free_urb(card->tx_cmd.urb);
315 card->tx_cmd.urb = NULL;
316
317 return;
318}
319
320/* This function probes an mwifiex device and registers it. It allocates
321 * the card structure, initiates the device registration and initialization
322 * procedure by adding a logical interface.
323 */
324static int mwifiex_usb_probe(struct usb_interface *intf,
325 const struct usb_device_id *id)
326{
327 struct usb_device *udev = interface_to_usbdev(intf);
328 struct usb_host_interface *iface_desc = intf->cur_altsetting;
329 struct usb_endpoint_descriptor *epd;
330 int ret, i;
331 struct usb_card_rec *card;
332 u16 id_vendor, id_product, bcd_device, bcd_usb;
333
334 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
335 if (!card)
336 return -ENOMEM;
337
338 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
339 id_product = le16_to_cpu(udev->descriptor.idProduct);
340 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
341 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
342 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
343 id_vendor, id_product, bcd_device);
344
345 /* PID_1 is used for firmware downloading only */
346 if (id_product == USB8797_PID_1)
347 card->usb_boot_state = USB8797_FW_DNLD;
348 else
349 card->usb_boot_state = USB8797_FW_READY;
350
351 card->udev = udev;
352 card->intf = intf;
027d3307 353 usb_card = card;
4daffe35 354
69797838 355 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n",
4daffe35
AK		 356 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
357 udev->descriptor.bDeviceSubClass,
358 udev->descriptor.bDeviceProtocol);
359
360 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
361 epd = &iface_desc->endpoint[i].desc;
362 if (usb_endpoint_dir_in(epd) &&
363 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
364 usb_endpoint_xfer_bulk(epd)) {
365 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
366 le16_to_cpu(epd->wMaxPacketSize),
367 epd->bEndpointAddress);
368 card->rx_cmd_ep = usb_endpoint_num(epd);
369 atomic_set(&card->rx_cmd_urb_pending, 0);
370 }
371 if (usb_endpoint_dir_in(epd) &&
372 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
373 usb_endpoint_xfer_bulk(epd)) {
374 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
375 le16_to_cpu(epd->wMaxPacketSize),
376 epd->bEndpointAddress);
377 card->rx_data_ep = usb_endpoint_num(epd);
378 atomic_set(&card->rx_data_urb_pending, 0);
379 }
380 if (usb_endpoint_dir_out(epd) &&
381 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
382 usb_endpoint_xfer_bulk(epd)) {
383 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
384 le16_to_cpu(epd->wMaxPacketSize),
385 epd->bEndpointAddress);
386 card->tx_data_ep = usb_endpoint_num(epd);
387 atomic_set(&card->tx_data_urb_pending, 0);
388 }
389 if (usb_endpoint_dir_out(epd) &&
390 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
391 usb_endpoint_xfer_bulk(epd)) {
392 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
393 le16_to_cpu(epd->wMaxPacketSize),
394 epd->bEndpointAddress);
395 card->tx_cmd_ep = usb_endpoint_num(epd);
396 atomic_set(&card->tx_cmd_urb_pending, 0);
397 card->bulk_out_maxpktsize =
398 le16_to_cpu(epd->wMaxPacketSize);
399 }
400 }
401
402 usb_set_intfdata(intf, card);
403
404 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
405 MWIFIEX_USB);
406 if (ret) {
407 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
408 usb_reset_device(udev);
409 kfree(card);
410 return ret;
411 }
412
413 usb_get_dev(udev);
414
415 return 0;
416}
417
418/* Kernel needs to suspend all functions separately. Therefore all
419 * registered functions must have drivers with suspend and resume
420 * methods. Failing that the kernel simply removes the whole card.
421 *
422 * If already not suspended, this function allocates and sends a
423 * 'host sleep activate' request to the firmware and turns off the traffic.
424 */
425static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
426{
427 struct usb_card_rec *card = usb_get_intfdata(intf);
428 struct mwifiex_adapter *adapter;
429 int i;
430
431 if (!card || !card->adapter) {
432 pr_err("%s: card or card->adapter is NULL\n", __func__);
433 return 0;
434 }
435 adapter = card->adapter;
436
437 if (unlikely(adapter->is_suspended))
438 dev_warn(adapter->dev, "Device already suspended\n");
439
440 mwifiex_enable_hs(adapter);
441
442 /* 'is_suspended' flag indicates device is suspended.
443 * It must be set here before the usb_kill_urb() calls. Reason
444 * is in the complete handlers, urb->status(= -ENOENT) and
445 * this flag is used in combination to distinguish between a
446 * 'suspended' state and a 'disconnect' one.
447 */
448 adapter->is_suspended = true;
449
4daffe35
AK		 450 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
451 usb_kill_urb(card->rx_cmd.urb);
452
453 if (atomic_read(&card->rx_data_urb_pending))
454 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
455 if (card->rx_data_list[i].urb)
456 usb_kill_urb(card->rx_data_list[i].urb);
457
458 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
459 if (card->tx_data_list[i].urb)
460 usb_kill_urb(card->tx_data_list[i].urb);
461
462 if (card->tx_cmd.urb)
463 usb_kill_urb(card->tx_cmd.urb);
464
465 return 0;
466}
467
468/* Kernel needs to suspend all functions separately. Therefore all
469 * registered functions must have drivers with suspend and resume
470 * methods. Failing that the kernel simply removes the whole card.
471 *
472 * If already not resumed, this function turns on the traffic and
473 * sends a 'host sleep cancel' request to the firmware.
474 */
475static int mwifiex_usb_resume(struct usb_interface *intf)
476{
477 struct usb_card_rec *card = usb_get_intfdata(intf);
478 struct mwifiex_adapter *adapter;
479 int i;
480
481 if (!card || !card->adapter) {
482 pr_err("%s: card or card->adapter is NULL\n", __func__);
483 return 0;
484 }
485 adapter = card->adapter;
486
487 if (unlikely(!adapter->is_suspended)) {
488 dev_warn(adapter->dev, "Device already resumed\n");
489 return 0;
490 }
491
492 /* Indicate device resumed. The netdev queue will be resumed only
493 * after the urbs have been re-submitted
494 */
495 adapter->is_suspended = false;
496
497 if (!atomic_read(&card->rx_data_urb_pending))
498 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
499 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
500 MWIFIEX_RX_DATA_BUF_SIZE);
501
502 if (!atomic_read(&card->rx_cmd_urb_pending)) {
503 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
504 if (card->rx_cmd.skb)
505 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
506 MWIFIEX_RX_CMD_BUF_SIZE);
507 }
508
4daffe35
AK		 509 /* Disable Host Sleep */
510 if (adapter->hs_activated)
511 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
512 MWIFIEX_BSS_ROLE_ANY),
513 MWIFIEX_ASYNC_CMD);
514
515#ifdef CONFIG_PM
516 /* Resume handler may be called due to remote wakeup,
517 * force to exit suspend anyway
518 */
519 usb_disable_autosuspend(card->udev);
520#endif /* CONFIG_PM */
521
522 return 0;
523}
524
525static void mwifiex_usb_disconnect(struct usb_interface *intf)
526{
527 struct usb_card_rec *card = usb_get_intfdata(intf);
528 struct mwifiex_adapter *adapter;
4daffe35
AK		 529
530 if (!card || !card->adapter) {
531 pr_err("%s: card or card->adapter is NULL\n", __func__);
532 return;
533 }
534
535 adapter = card->adapter;
536 if (!adapter->priv_num)
537 return;
538
4daffe35
AK		 539 mwifiex_usb_free(card);
540
541 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
542 mwifiex_remove_card(adapter, &add_remove_card_sem);
543
544 usb_set_intfdata(intf, NULL);
545 usb_put_dev(interface_to_usbdev(intf));
546 kfree(card);
547
548 return;
549}
550
551static struct usb_driver mwifiex_usb_driver = {
552 .name = usbdriver_name,
553 .probe = mwifiex_usb_probe,
554 .disconnect = mwifiex_usb_disconnect,
555 .id_table = mwifiex_usb_table,
556 .suspend = mwifiex_usb_suspend,
557 .resume = mwifiex_usb_resume,
558 .supports_autosuspend = 1,
559};
560
561static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
562{
563 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
564 int i;
565
566 card->tx_cmd.adapter = adapter;
567 card->tx_cmd.ep = card->tx_cmd_ep;
568
569 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
570 if (!card->tx_cmd.urb) {
571 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
572 return -ENOMEM;
573 }
574
575 card->tx_data_ix = 0;
576
577 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
578 card->tx_data_list[i].adapter = adapter;
579 card->tx_data_list[i].ep = card->tx_data_ep;
580
581 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
582 if (!card->tx_data_list[i].urb) {
583 dev_err(adapter->dev,
584 "tx_data_list[] urb allocation failed\n");
585 return -ENOMEM;
586 }
587 }
588
589 return 0;
590}
591
592static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
593{
594 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
595 int i;
596
597 card->rx_cmd.adapter = adapter;
598 card->rx_cmd.ep = card->rx_cmd_ep;
599
600 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
601 if (!card->rx_cmd.urb) {
602 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
603 return -ENOMEM;
604 }
605
606 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
607 if (!card->rx_cmd.skb) {
608 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
609 return -ENOMEM;
610 }
611
612 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
613 return -1;
614
615 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
616 card->rx_data_list[i].adapter = adapter;
617 card->rx_data_list[i].ep = card->rx_data_ep;
618
619 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
620 if (!card->rx_data_list[i].urb) {
621 dev_err(adapter->dev,
622 "rx_data_list[] urb allocation failed\n");
623 return -1;
624 }
625 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
626 MWIFIEX_RX_DATA_BUF_SIZE))
627 return -1;
628 }
629
630 return 0;
631}
632
633static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
634 u32 *len, u8 ep, u32 timeout)
635{
636 struct usb_card_rec *card = adapter->card;
637 int actual_length, ret;
638
639 if (!(*len % card->bulk_out_maxpktsize))
640 (*len)++;
641
642 /* Send the data block */
643 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
644 *len, &actual_length, timeout);
645 if (ret) {
646 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
5b2e2ecc 647 return ret;
4daffe35
AK		 648 }
649
650 *len = actual_length;
651
652 return ret;
653}
654
655static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
656 u32 *len, u8 ep, u32 timeout)
657{
658 struct usb_card_rec *card = adapter->card;
659 int actual_length, ret;
660
661 /* Receive the data response */
662 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
663 *len, &actual_length, timeout);
664 if (ret) {
665 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
5b2e2ecc 666 return ret;
4daffe35
AK		 667 }
668
669 *len = actual_length;
670
671 return ret;
672}
673
674/* This function write a command/data packet to card. */
675static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
676 struct sk_buff *skb,
677 struct mwifiex_tx_param *tx_param)
678{
679 struct usb_card_rec *card = adapter->card;
680 struct urb_context *context;
681 u8 *data = (u8 *)skb->data;
682 struct urb *tx_urb;
683
684 if (adapter->is_suspended) {
685 dev_err(adapter->dev,
686 "%s: not allowed while suspended\n", __func__);
687 return -1;
688 }
689
690 if (adapter->surprise_removed) {
691 dev_err(adapter->dev, "%s: device removed\n", __func__);
692 return -1;
693 }
694
695 if (ep == card->tx_data_ep &&
696 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
697 return -EBUSY;
698 }
699
700 dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
701
702 if (ep == card->tx_cmd_ep) {
703 context = &card->tx_cmd;
704 } else {
705 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
706 card->tx_data_ix = 0;
707 context = &card->tx_data_list[card->tx_data_ix++];
708 }
709
710 context->adapter = adapter;
711 context->ep = ep;
712 context->skb = skb;
713 tx_urb = context->urb;
714
715 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
716 data, skb->len, mwifiex_usb_tx_complete,
717 (void *)context);
718
719 tx_urb->transfer_flags |= URB_ZERO_PACKET;
720
721 if (ep == card->tx_cmd_ep)
722 atomic_inc(&card->tx_cmd_urb_pending);
723 else
724 atomic_inc(&card->tx_data_urb_pending);
725
726 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
727 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
728 if (ep == card->tx_cmd_ep) {
729 atomic_dec(&card->tx_cmd_urb_pending);
730 } else {
731 atomic_dec(&card->tx_data_urb_pending);
732 if (card->tx_data_ix)
733 card->tx_data_ix--;
734 else
735 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
736 }
737
738 return -1;
739 } else {
740 if (ep == card->tx_data_ep &&
741 atomic_read(&card->tx_data_urb_pending) ==
742 MWIFIEX_TX_DATA_URB)
743 return -ENOSR;
744 }
745
746 return -EINPROGRESS;
747}
748
749/* This function register usb device and initialize parameter. */
750static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
751{
752 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
753
754 card->adapter = adapter;
755 adapter->dev = &card->udev->dev;
756 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
757
758 return 0;
759}
760
2739a95d
AK		 761static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
762{
763 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
764
765 usb_set_intfdata(card->intf, NULL);
766}
767
4daffe35
AK		 768static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
769 struct mwifiex_fw_image *fw)
770{
771 int ret = 0;
772 u8 *firmware = fw->fw_buf, *recv_buff;
773 u32 retries = USB8797_FW_MAX_RETRY, dlen;
774 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
775 struct fw_data *fwdata;
776 struct fw_sync_header sync_fw;
777 u8 check_winner = 1;
778
779 if (!firmware) {
780 dev_err(adapter->dev,
781 "No firmware image found! Terminating download\n");
782 ret = -1;
783 goto fw_exit;
784 }
785
786 /* Allocate memory for transmit */
787 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
788 if (!fwdata)
789 goto fw_exit;
790
791 /* Allocate memory for receive */
792 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
793 if (!recv_buff)
794 goto cleanup;
795
796 do {
797 /* Send pseudo data to check winner status first */
798 if (check_winner) {
799 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
800 dlen = 0;
801 } else {
802 /* copy the header of the fw_data to get the length */
fc40ca92
SL		 803 memcpy(&fwdata->fw_hdr, &firmware[tlen],
804 sizeof(struct fw_header));
4daffe35
AK		 805
806 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
807 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
808 tlen += sizeof(struct fw_header);
809
fc40ca92 810 memcpy(fwdata->data, &firmware[tlen], dlen);
4daffe35
AK		 811
812 fwdata->seq_num = cpu_to_le32(fw_seqnum);
813 tlen += dlen;
814 }
815
816 /* If the send/receive fails or CRC occurs then retry */
817 while (retries--) {
818 u8 *buf = (u8 *)fwdata;
819 u32 len = FW_DATA_XMIT_SIZE;
820
821 /* send the firmware block */
822 ret = mwifiex_write_data_sync(adapter, buf, &len,
823 MWIFIEX_USB_EP_CMD_EVENT,
824 MWIFIEX_USB_TIMEOUT);
825 if (ret) {
826 dev_err(adapter->dev,
827 "write_data_sync: failed: %d\n", ret);
828 continue;
829 }
830
831 buf = recv_buff;
832 len = FW_DNLD_RX_BUF_SIZE;
833
834 /* Receive the firmware block response */
835 ret = mwifiex_read_data_sync(adapter, buf, &len,
836 MWIFIEX_USB_EP_CMD_EVENT,
837 MWIFIEX_USB_TIMEOUT);
838 if (ret) {
839 dev_err(adapter->dev,
840 "read_data_sync: failed: %d\n", ret);
841 continue;
842 }
843
844 memcpy(&sync_fw, recv_buff,
845 sizeof(struct fw_sync_header));
846
847 /* check 1st firmware block resp for highest bit set */
848 if (check_winner) {
849 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
850 dev_warn(adapter->dev,
851 "USB is not the winner %#x\n",
852 sync_fw.cmd);
853
854 /* returning success */
855 ret = 0;
856 goto cleanup;
857 }
858
859 dev_dbg(adapter->dev,
860 "USB is the winner, start to download FW\n");
861
862 check_winner = 0;
863 break;
864 }
865
866 /* check the firmware block response for CRC errors */
867 if (sync_fw.cmd) {
868 dev_err(adapter->dev,
869 "FW received block with CRC %#x\n",
870 sync_fw.cmd);
871 ret = -1;
872 continue;
873 }
874
875 retries = USB8797_FW_MAX_RETRY;
876 break;
877 }
878 fw_seqnum++;
879 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
880
881cleanup:
882 dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
883
884 kfree(recv_buff);
885 kfree(fwdata);
886
887 if (retries)
888 ret = 0;
889fw_exit:
890 return ret;
891}
892
893static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
894 struct mwifiex_fw_image *fw)
895{
896 int ret;
897 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
898
899 if (card->usb_boot_state == USB8797_FW_DNLD) {
900 ret = mwifiex_prog_fw_w_helper(adapter, fw);
901 if (ret)
902 return -1;
903
904 /* Boot state changes after successful firmware download */
905 if (card->usb_boot_state == USB8797_FW_DNLD)
906 return -1;
907 }
908
909 ret = mwifiex_usb_rx_init(adapter);
910 if (!ret)
911 ret = mwifiex_usb_tx_init(adapter);
912
913 return ret;
914}
915
916static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
917{
918 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
919
920 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
921 if ((ep == card->rx_cmd_ep) &&
922 (!atomic_read(&card->rx_cmd_urb_pending)))
923 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
924 MWIFIEX_RX_CMD_BUF_SIZE);
925
926 return;
927}
928
929static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
930 struct sk_buff *skb)
931{
932 atomic_dec(&adapter->rx_pending);
933 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
934
935 return 0;
936}
937
938static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter,
939 struct sk_buff *skb)
940{
941 atomic_dec(&adapter->rx_pending);
942 dev_kfree_skb_any(skb);
943
944 return 0;
945}
946
947/* This function wakes up the card. */
948static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
949{
950 /* Simulation of HS_AWAKE event */
951 adapter->pm_wakeup_fw_try = false;
952 adapter->pm_wakeup_card_req = false;
953 adapter->ps_state = PS_STATE_AWAKE;
954
955 return 0;
956}
957
958static struct mwifiex_if_ops usb_ops = {
959 .register_dev = mwifiex_register_dev,
2739a95d 960 .unregister_dev = mwifiex_unregister_dev,
4daffe35
AK		 961 .wakeup = mwifiex_pm_wakeup_card,
962 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
963
964 /* USB specific */
965 .dnld_fw = mwifiex_usb_dnld_fw,
966 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
967 .event_complete = mwifiex_usb_cmd_event_complete,
968 .data_complete = mwifiex_usb_data_complete,
969 .host_to_card = mwifiex_usb_host_to_card,
970};
971
972/* This function initializes the USB driver module.
973 *
974 * This initiates the semaphore and registers the device with
975 * USB bus.
976 */
977static int mwifiex_usb_init_module(void)
978{
979 int ret;
980
981 pr_debug("Marvell USB8797 Driver\n");
982
983 sema_init(&add_remove_card_sem, 1);
984
985 ret = usb_register(&mwifiex_usb_driver);
986 if (ret)
987 pr_err("Driver register failed!\n");
988 else
989 pr_debug("info: Driver registered successfully!\n");
990
991 return ret;
992}
993
994/* This function cleans up the USB driver.
995 *
996 * The following major steps are followed in .disconnect for cleanup:
997 * - Resume the device if its suspended
998 * - Disconnect the device if connected
999 * - Shutdown the firmware
1000 * - Unregister the device from USB bus.
1001 */
1002static void mwifiex_usb_cleanup_module(void)
1003{
1004 if (!down_interruptible(&add_remove_card_sem))
1005 up(&add_remove_card_sem);
1006
027d3307
AK		 1007 if (usb_card) {
1008 struct mwifiex_adapter *adapter = usb_card->adapter;
1009 int i;
1010
1011 /* In case driver is removed when asynchronous FW downloading is
1012 * in progress
1013 */
1014 wait_for_completion(&adapter->fw_load);
1015
1016#ifdef CONFIG_PM
1017 if (adapter->is_suspended)
1018 mwifiex_usb_resume(usb_card->intf);
1019#endif
1020 for (i = 0; i < adapter->priv_num; i++)
1021 if ((GET_BSS_ROLE(adapter->priv[i]) ==
1022 MWIFIEX_BSS_ROLE_STA) &&
1023 adapter->priv[i]->media_connected)
1024 mwifiex_deauthenticate(adapter->priv[i], NULL);
1025
1026 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
1027 MWIFIEX_BSS_ROLE_ANY),
1028 MWIFIEX_FUNC_SHUTDOWN);
1029 }
4daffe35
AK		 1030
1031 usb_deregister(&mwifiex_usb_driver);
1032}
1033
1034module_init(mwifiex_usb_init_module);
1035module_exit(mwifiex_usb_cleanup_module);
1036
1037MODULE_AUTHOR("Marvell International Ltd.");
1038MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1039MODULE_VERSION(USB_VERSION);
1040MODULE_LICENSE("GPL v2");
1041MODULE_FIRMWARE("mrvl/usb8797_uapsta.bin");
Linux kernel - Deliverables
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