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clk: mxs: imx28: decrease the frequency of ref_io1 for SSP2 and SSP3
[deliverable/linux.git] / drivers / net / wireless / mwifiex / usb.c
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
25 static const char usbdriver_name[] = "usb8797";
26
27 static u8 user_rmmod;
28 static struct mwifiex_if_ops usb_ops;
29 static struct semaphore add_remove_card_sem;
30
31 static 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
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 */
46 static 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;
52
53 if (adapter->hs_activated)
54 mwifiex_process_hs_config(adapter);
55
56 if (skb->len < INTF_HEADER_LEN) {
57 dev_err(dev, "%s: invalid skb->len\n", __func__);
58 return -1;
59 }
60
61 switch (ep) {
62 case MWIFIEX_USB_EP_CMD_EVENT:
63 dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__);
64 skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN);
65 recv_type = le32_to_cpu(tmp);
66 skb_pull(skb, INTF_HEADER_LEN);
67
68 switch (recv_type) {
69 case MWIFIEX_USB_TYPE_CMD:
70 if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) {
71 dev_err(dev, "CMD: skb->len too large\n");
72 return -1;
73 } else if (!adapter->curr_cmd) {
74 dev_dbg(dev, "CMD: no curr_cmd\n");
75 if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
76 mwifiex_process_sleep_confirm_resp(
77 adapter, skb->data,
78 skb->len);
79 return 0;
80 }
81 return -1;
82 }
83
84 adapter->curr_cmd->resp_skb = skb;
85 adapter->cmd_resp_received = true;
86 break;
87 case MWIFIEX_USB_TYPE_EVENT:
88 if (skb->len < sizeof(u32)) {
89 dev_err(dev, "EVENT: skb->len too small\n");
90 return -1;
91 }
92 skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
93 adapter->event_cause = le32_to_cpu(tmp);
94 skb_pull(skb, sizeof(u32));
95 dev_dbg(dev, "event_cause %#x\n", adapter->event_cause);
96
97 if (skb->len > MAX_EVENT_SIZE) {
98 dev_err(dev, "EVENT: event body too large\n");
99 return -1;
100 }
101
102 skb_copy_from_linear_data(skb, adapter->event_body,
103 skb->len);
104 adapter->event_received = true;
105 adapter->event_skb = skb;
106 break;
107 default:
108 dev_err(dev, "unknown recv_type %#x\n", recv_type);
109 return -1;
110 }
111 break;
112 case MWIFIEX_USB_EP_DATA:
113 dev_dbg(dev, "%s: EP_DATA\n", __func__);
114 if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) {
115 dev_err(dev, "DATA: skb->len too large\n");
116 return -1;
117 }
118 skb_queue_tail(&adapter->usb_rx_data_q, skb);
119 adapter->data_received = true;
120 break;
121 default:
122 dev_err(dev, "%s: unknown endport %#x\n", __func__, ep);
123 return -1;
124 }
125
126 return -EINPROGRESS;
127 }
128
129 static void mwifiex_usb_rx_complete(struct urb *urb)
130 {
131 struct urb_context *context = (struct urb_context *)urb->context;
132 struct mwifiex_adapter *adapter = context->adapter;
133 struct sk_buff *skb = context->skb;
134 struct usb_card_rec *card;
135 int recv_length = urb->actual_length;
136 int size, status;
137
138 if (!adapter || !adapter->card) {
139 pr_err("mwifiex adapter or card structure is not valid\n");
140 return;
141 }
142
143 card = (struct usb_card_rec *)adapter->card;
144 if (card->rx_cmd_ep == context->ep)
145 atomic_dec(&card->rx_cmd_urb_pending);
146 else
147 atomic_dec(&card->rx_data_urb_pending);
148
149 if (recv_length) {
150 if (urb->status || (adapter->surprise_removed)) {
151 dev_err(adapter->dev,
152 "URB status is failed: %d\n", urb->status);
153 /* Do not free skb in case of command ep */
154 if (card->rx_cmd_ep != context->ep)
155 dev_kfree_skb_any(skb);
156 goto setup_for_next;
157 }
158 if (skb->len > recv_length)
159 skb_trim(skb, recv_length);
160 else
161 skb_put(skb, recv_length - skb->len);
162
163 atomic_inc(&adapter->rx_pending);
164 status = mwifiex_usb_recv(adapter, skb, context->ep);
165
166 dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n",
167 recv_length, status);
168 if (status == -EINPROGRESS) {
169 queue_work(adapter->workqueue, &adapter->main_work);
170
171 /* urb for data_ep is re-submitted now;
172 * urb for cmd_ep will be re-submitted in callback
173 * mwifiex_usb_recv_complete
174 */
175 if (card->rx_cmd_ep == context->ep)
176 return;
177 } else {
178 atomic_dec(&adapter->rx_pending);
179 if (status == -1)
180 dev_err(adapter->dev,
181 "received data processing failed!\n");
182
183 /* Do not free skb in case of command ep */
184 if (card->rx_cmd_ep != context->ep)
185 dev_kfree_skb_any(skb);
186 }
187 } else if (urb->status) {
188 if (!adapter->is_suspended) {
189 dev_warn(adapter->dev,
190 "Card is removed: %d\n", urb->status);
191 adapter->surprise_removed = true;
192 }
193 dev_kfree_skb_any(skb);
194 return;
195 } else {
196 /* Do not free skb in case of command ep */
197 if (card->rx_cmd_ep != context->ep)
198 dev_kfree_skb_any(skb);
199
200 /* fall through setup_for_next */
201 }
202
203 setup_for_next:
204 if (card->rx_cmd_ep == context->ep)
205 size = MWIFIEX_RX_CMD_BUF_SIZE;
206 else
207 size = MWIFIEX_RX_DATA_BUF_SIZE;
208
209 mwifiex_usb_submit_rx_urb(context, size);
210
211 return;
212 }
213
214 static void mwifiex_usb_tx_complete(struct urb *urb)
215 {
216 struct urb_context *context = (struct urb_context *)(urb->context);
217 struct mwifiex_adapter *adapter = context->adapter;
218 struct usb_card_rec *card = adapter->card;
219
220 dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status);
221
222 if (context->ep == card->tx_cmd_ep) {
223 dev_dbg(adapter->dev, "%s: CMD\n", __func__);
224 atomic_dec(&card->tx_cmd_urb_pending);
225 adapter->cmd_sent = false;
226 } else {
227 dev_dbg(adapter->dev, "%s: DATA\n", __func__);
228 atomic_dec(&card->tx_data_urb_pending);
229 mwifiex_write_data_complete(adapter, context->skb,
230 urb->status ? -1 : 0);
231 }
232
233 queue_work(adapter->workqueue, &adapter->main_work);
234
235 return;
236 }
237
238 static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size)
239 {
240 struct mwifiex_adapter *adapter = ctx->adapter;
241 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
242
243 if (card->rx_cmd_ep != ctx->ep) {
244 ctx->skb = dev_alloc_skb(size);
245 if (!ctx->skb) {
246 dev_err(adapter->dev,
247 "%s: dev_alloc_skb failed\n", __func__);
248 return -ENOMEM;
249 }
250 }
251
252 usb_fill_bulk_urb(ctx->urb, card->udev,
253 usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data,
254 size, mwifiex_usb_rx_complete, (void *)ctx);
255
256 if (card->rx_cmd_ep == ctx->ep)
257 atomic_inc(&card->rx_cmd_urb_pending);
258 else
259 atomic_inc(&card->rx_data_urb_pending);
260
261 if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) {
262 dev_err(adapter->dev, "usb_submit_urb failed\n");
263 dev_kfree_skb_any(ctx->skb);
264 ctx->skb = NULL;
265
266 if (card->rx_cmd_ep == ctx->ep)
267 atomic_dec(&card->rx_cmd_urb_pending);
268 else
269 atomic_dec(&card->rx_data_urb_pending);
270
271 return -1;
272 }
273
274 return 0;
275 }
276
277 static void mwifiex_usb_free(struct usb_card_rec *card)
278 {
279 int i;
280
281 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
282 usb_kill_urb(card->rx_cmd.urb);
283
284 usb_free_urb(card->rx_cmd.urb);
285 card->rx_cmd.urb = NULL;
286
287 if (atomic_read(&card->rx_data_urb_pending))
288 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
289 if (card->rx_data_list[i].urb)
290 usb_kill_urb(card->rx_data_list[i].urb);
291
292 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
293 usb_free_urb(card->rx_data_list[i].urb);
294 card->rx_data_list[i].urb = NULL;
295 }
296
297 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
298 usb_free_urb(card->tx_data_list[i].urb);
299 card->tx_data_list[i].urb = NULL;
300 }
301
302 usb_free_urb(card->tx_cmd.urb);
303 card->tx_cmd.urb = NULL;
304
305 return;
306 }
307
308 /* This function probes an mwifiex device and registers it. It allocates
309 * the card structure, initiates the device registration and initialization
310 * procedure by adding a logical interface.
311 */
312 static int mwifiex_usb_probe(struct usb_interface *intf,
313 const struct usb_device_id *id)
314 {
315 struct usb_device *udev = interface_to_usbdev(intf);
316 struct usb_host_interface *iface_desc = intf->cur_altsetting;
317 struct usb_endpoint_descriptor *epd;
318 int ret, i;
319 struct usb_card_rec *card;
320 u16 id_vendor, id_product, bcd_device, bcd_usb;
321
322 card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
323 if (!card)
324 return -ENOMEM;
325
326 id_vendor = le16_to_cpu(udev->descriptor.idVendor);
327 id_product = le16_to_cpu(udev->descriptor.idProduct);
328 bcd_device = le16_to_cpu(udev->descriptor.bcdDevice);
329 bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB);
330 pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n",
331 id_vendor, id_product, bcd_device);
332
333 /* PID_1 is used for firmware downloading only */
334 if (id_product == USB8797_PID_1)
335 card->usb_boot_state = USB8797_FW_DNLD;
336 else
337 card->usb_boot_state = USB8797_FW_READY;
338
339 card->udev = udev;
340 card->intf = intf;
341
342 pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocl=%#x\n",
343 udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass,
344 udev->descriptor.bDeviceSubClass,
345 udev->descriptor.bDeviceProtocol);
346
347 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
348 epd = &iface_desc->endpoint[i].desc;
349 if (usb_endpoint_dir_in(epd) &&
350 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
351 usb_endpoint_xfer_bulk(epd)) {
352 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
353 le16_to_cpu(epd->wMaxPacketSize),
354 epd->bEndpointAddress);
355 card->rx_cmd_ep = usb_endpoint_num(epd);
356 atomic_set(&card->rx_cmd_urb_pending, 0);
357 }
358 if (usb_endpoint_dir_in(epd) &&
359 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
360 usb_endpoint_xfer_bulk(epd)) {
361 pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n",
362 le16_to_cpu(epd->wMaxPacketSize),
363 epd->bEndpointAddress);
364 card->rx_data_ep = usb_endpoint_num(epd);
365 atomic_set(&card->rx_data_urb_pending, 0);
366 }
367 if (usb_endpoint_dir_out(epd) &&
368 usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA &&
369 usb_endpoint_xfer_bulk(epd)) {
370 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
371 le16_to_cpu(epd->wMaxPacketSize),
372 epd->bEndpointAddress);
373 card->tx_data_ep = usb_endpoint_num(epd);
374 atomic_set(&card->tx_data_urb_pending, 0);
375 }
376 if (usb_endpoint_dir_out(epd) &&
377 usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT &&
378 usb_endpoint_xfer_bulk(epd)) {
379 pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n",
380 le16_to_cpu(epd->wMaxPacketSize),
381 epd->bEndpointAddress);
382 card->tx_cmd_ep = usb_endpoint_num(epd);
383 atomic_set(&card->tx_cmd_urb_pending, 0);
384 card->bulk_out_maxpktsize =
385 le16_to_cpu(epd->wMaxPacketSize);
386 }
387 }
388
389 usb_set_intfdata(intf, card);
390
391 ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops,
392 MWIFIEX_USB);
393 if (ret) {
394 pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret);
395 usb_reset_device(udev);
396 kfree(card);
397 return ret;
398 }
399
400 usb_get_dev(udev);
401
402 return 0;
403 }
404
405 /* Kernel needs to suspend all functions separately. Therefore all
406 * registered functions must have drivers with suspend and resume
407 * methods. Failing that the kernel simply removes the whole card.
408 *
409 * If already not suspended, this function allocates and sends a
410 * 'host sleep activate' request to the firmware and turns off the traffic.
411 */
412 static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message)
413 {
414 struct usb_card_rec *card = usb_get_intfdata(intf);
415 struct mwifiex_adapter *adapter;
416 int i;
417
418 if (!card || !card->adapter) {
419 pr_err("%s: card or card->adapter is NULL\n", __func__);
420 return 0;
421 }
422 adapter = card->adapter;
423
424 if (unlikely(adapter->is_suspended))
425 dev_warn(adapter->dev, "Device already suspended\n");
426
427 mwifiex_enable_hs(adapter);
428
429 /* 'is_suspended' flag indicates device is suspended.
430 * It must be set here before the usb_kill_urb() calls. Reason
431 * is in the complete handlers, urb->status(= -ENOENT) and
432 * this flag is used in combination to distinguish between a
433 * 'suspended' state and a 'disconnect' one.
434 */
435 adapter->is_suspended = true;
436
437 for (i = 0; i < adapter->priv_num; i++)
438 netif_carrier_off(adapter->priv[i]->netdev);
439
440 if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb)
441 usb_kill_urb(card->rx_cmd.urb);
442
443 if (atomic_read(&card->rx_data_urb_pending))
444 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
445 if (card->rx_data_list[i].urb)
446 usb_kill_urb(card->rx_data_list[i].urb);
447
448 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++)
449 if (card->tx_data_list[i].urb)
450 usb_kill_urb(card->tx_data_list[i].urb);
451
452 if (card->tx_cmd.urb)
453 usb_kill_urb(card->tx_cmd.urb);
454
455 return 0;
456 }
457
458 /* Kernel needs to suspend all functions separately. Therefore all
459 * registered functions must have drivers with suspend and resume
460 * methods. Failing that the kernel simply removes the whole card.
461 *
462 * If already not resumed, this function turns on the traffic and
463 * sends a 'host sleep cancel' request to the firmware.
464 */
465 static int mwifiex_usb_resume(struct usb_interface *intf)
466 {
467 struct usb_card_rec *card = usb_get_intfdata(intf);
468 struct mwifiex_adapter *adapter;
469 int i;
470
471 if (!card || !card->adapter) {
472 pr_err("%s: card or card->adapter is NULL\n", __func__);
473 return 0;
474 }
475 adapter = card->adapter;
476
477 if (unlikely(!adapter->is_suspended)) {
478 dev_warn(adapter->dev, "Device already resumed\n");
479 return 0;
480 }
481
482 /* Indicate device resumed. The netdev queue will be resumed only
483 * after the urbs have been re-submitted
484 */
485 adapter->is_suspended = false;
486
487 if (!atomic_read(&card->rx_data_urb_pending))
488 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++)
489 mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
490 MWIFIEX_RX_DATA_BUF_SIZE);
491
492 if (!atomic_read(&card->rx_cmd_urb_pending)) {
493 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
494 if (card->rx_cmd.skb)
495 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
496 MWIFIEX_RX_CMD_BUF_SIZE);
497 }
498
499 for (i = 0; i < adapter->priv_num; i++)
500 if (adapter->priv[i]->media_connected)
501 netif_carrier_on(adapter->priv[i]->netdev);
502
503 /* Disable Host Sleep */
504 if (adapter->hs_activated)
505 mwifiex_cancel_hs(mwifiex_get_priv(adapter,
506 MWIFIEX_BSS_ROLE_ANY),
507 MWIFIEX_ASYNC_CMD);
508
509 #ifdef CONFIG_PM
510 /* Resume handler may be called due to remote wakeup,
511 * force to exit suspend anyway
512 */
513 usb_disable_autosuspend(card->udev);
514 #endif /* CONFIG_PM */
515
516 return 0;
517 }
518
519 static void mwifiex_usb_disconnect(struct usb_interface *intf)
520 {
521 struct usb_card_rec *card = usb_get_intfdata(intf);
522 struct mwifiex_adapter *adapter;
523 int i;
524
525 if (!card || !card->adapter) {
526 pr_err("%s: card or card->adapter is NULL\n", __func__);
527 return;
528 }
529
530 adapter = card->adapter;
531 if (!adapter->priv_num)
532 return;
533
534 /* In case driver is removed when asynchronous FW downloading is
535 * in progress
536 */
537 wait_for_completion(&adapter->fw_load);
538
539 if (user_rmmod) {
540 #ifdef CONFIG_PM
541 if (adapter->is_suspended)
542 mwifiex_usb_resume(intf);
543 #endif
544 for (i = 0; i < adapter->priv_num; i++)
545 if ((GET_BSS_ROLE(adapter->priv[i]) ==
546 MWIFIEX_BSS_ROLE_STA) &&
547 adapter->priv[i]->media_connected)
548 mwifiex_deauthenticate(adapter->priv[i], NULL);
549
550 mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
551 MWIFIEX_BSS_ROLE_ANY),
552 MWIFIEX_FUNC_SHUTDOWN);
553 }
554
555 mwifiex_usb_free(card);
556
557 dev_dbg(adapter->dev, "%s: removing card\n", __func__);
558 mwifiex_remove_card(adapter, &add_remove_card_sem);
559
560 usb_set_intfdata(intf, NULL);
561 usb_put_dev(interface_to_usbdev(intf));
562 kfree(card);
563
564 return;
565 }
566
567 static struct usb_driver mwifiex_usb_driver = {
568 .name = usbdriver_name,
569 .probe = mwifiex_usb_probe,
570 .disconnect = mwifiex_usb_disconnect,
571 .id_table = mwifiex_usb_table,
572 .suspend = mwifiex_usb_suspend,
573 .resume = mwifiex_usb_resume,
574 .supports_autosuspend = 1,
575 };
576
577 static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter)
578 {
579 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
580 int i;
581
582 card->tx_cmd.adapter = adapter;
583 card->tx_cmd.ep = card->tx_cmd_ep;
584
585 card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
586 if (!card->tx_cmd.urb) {
587 dev_err(adapter->dev, "tx_cmd.urb allocation failed\n");
588 return -ENOMEM;
589 }
590
591 card->tx_data_ix = 0;
592
593 for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) {
594 card->tx_data_list[i].adapter = adapter;
595 card->tx_data_list[i].ep = card->tx_data_ep;
596
597 card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
598 if (!card->tx_data_list[i].urb) {
599 dev_err(adapter->dev,
600 "tx_data_list[] urb allocation failed\n");
601 return -ENOMEM;
602 }
603 }
604
605 return 0;
606 }
607
608 static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter)
609 {
610 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
611 int i;
612
613 card->rx_cmd.adapter = adapter;
614 card->rx_cmd.ep = card->rx_cmd_ep;
615
616 card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL);
617 if (!card->rx_cmd.urb) {
618 dev_err(adapter->dev, "rx_cmd.urb allocation failed\n");
619 return -ENOMEM;
620 }
621
622 card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE);
623 if (!card->rx_cmd.skb) {
624 dev_err(adapter->dev, "rx_cmd.skb allocation failed\n");
625 return -ENOMEM;
626 }
627
628 if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE))
629 return -1;
630
631 for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) {
632 card->rx_data_list[i].adapter = adapter;
633 card->rx_data_list[i].ep = card->rx_data_ep;
634
635 card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL);
636 if (!card->rx_data_list[i].urb) {
637 dev_err(adapter->dev,
638 "rx_data_list[] urb allocation failed\n");
639 return -1;
640 }
641 if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i],
642 MWIFIEX_RX_DATA_BUF_SIZE))
643 return -1;
644 }
645
646 return 0;
647 }
648
649 static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
650 u32 *len, u8 ep, u32 timeout)
651 {
652 struct usb_card_rec *card = adapter->card;
653 int actual_length, ret;
654
655 if (!(*len % card->bulk_out_maxpktsize))
656 (*len)++;
657
658 /* Send the data block */
659 ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf,
660 *len, &actual_length, timeout);
661 if (ret) {
662 dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret);
663 ret = -1;
664 }
665
666 *len = actual_length;
667
668 return ret;
669 }
670
671 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf,
672 u32 *len, u8 ep, u32 timeout)
673 {
674 struct usb_card_rec *card = adapter->card;
675 int actual_length, ret;
676
677 /* Receive the data response */
678 ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf,
679 *len, &actual_length, timeout);
680 if (ret) {
681 dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret);
682 ret = -1;
683 }
684
685 *len = actual_length;
686
687 return ret;
688 }
689
690 /* This function write a command/data packet to card. */
691 static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep,
692 struct sk_buff *skb,
693 struct mwifiex_tx_param *tx_param)
694 {
695 struct usb_card_rec *card = adapter->card;
696 struct urb_context *context;
697 u8 *data = (u8 *)skb->data;
698 struct urb *tx_urb;
699
700 if (adapter->is_suspended) {
701 dev_err(adapter->dev,
702 "%s: not allowed while suspended\n", __func__);
703 return -1;
704 }
705
706 if (adapter->surprise_removed) {
707 dev_err(adapter->dev, "%s: device removed\n", __func__);
708 return -1;
709 }
710
711 if (ep == card->tx_data_ep &&
712 atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) {
713 return -EBUSY;
714 }
715
716 dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep);
717
718 if (ep == card->tx_cmd_ep) {
719 context = &card->tx_cmd;
720 } else {
721 if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB)
722 card->tx_data_ix = 0;
723 context = &card->tx_data_list[card->tx_data_ix++];
724 }
725
726 context->adapter = adapter;
727 context->ep = ep;
728 context->skb = skb;
729 tx_urb = context->urb;
730
731 usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep),
732 data, skb->len, mwifiex_usb_tx_complete,
733 (void *)context);
734
735 tx_urb->transfer_flags |= URB_ZERO_PACKET;
736
737 if (ep == card->tx_cmd_ep)
738 atomic_inc(&card->tx_cmd_urb_pending);
739 else
740 atomic_inc(&card->tx_data_urb_pending);
741
742 if (usb_submit_urb(tx_urb, GFP_ATOMIC)) {
743 dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__);
744 if (ep == card->tx_cmd_ep) {
745 atomic_dec(&card->tx_cmd_urb_pending);
746 } else {
747 atomic_dec(&card->tx_data_urb_pending);
748 if (card->tx_data_ix)
749 card->tx_data_ix--;
750 else
751 card->tx_data_ix = MWIFIEX_TX_DATA_URB;
752 }
753
754 return -1;
755 } else {
756 if (ep == card->tx_data_ep &&
757 atomic_read(&card->tx_data_urb_pending) ==
758 MWIFIEX_TX_DATA_URB)
759 return -ENOSR;
760 }
761
762 return -EINPROGRESS;
763 }
764
765 /* This function register usb device and initialize parameter. */
766 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
767 {
768 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
769
770 card->adapter = adapter;
771 adapter->dev = &card->udev->dev;
772 strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME);
773
774 return 0;
775 }
776
777 /* This function reads one block of firmware data. */
778 static int mwifiex_get_fw_data(struct mwifiex_adapter *adapter,
779 u32 offset, u32 len, u8 *buf)
780 {
781 if (!buf || !len)
782 return -1;
783
784 if (offset + len > adapter->firmware->size)
785 return -1;
786
787 memcpy(buf, adapter->firmware->data + offset, len);
788
789 return 0;
790 }
791
792 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
793 struct mwifiex_fw_image *fw)
794 {
795 int ret = 0;
796 u8 *firmware = fw->fw_buf, *recv_buff;
797 u32 retries = USB8797_FW_MAX_RETRY, dlen;
798 u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0;
799 struct fw_data *fwdata;
800 struct fw_sync_header sync_fw;
801 u8 check_winner = 1;
802
803 if (!firmware) {
804 dev_err(adapter->dev,
805 "No firmware image found! Terminating download\n");
806 ret = -1;
807 goto fw_exit;
808 }
809
810 /* Allocate memory for transmit */
811 fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL);
812 if (!fwdata)
813 goto fw_exit;
814
815 /* Allocate memory for receive */
816 recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL);
817 if (!recv_buff)
818 goto cleanup;
819
820 do {
821 /* Send pseudo data to check winner status first */
822 if (check_winner) {
823 memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header));
824 dlen = 0;
825 } else {
826 /* copy the header of the fw_data to get the length */
827 if (firmware)
828 memcpy(&fwdata->fw_hdr, &firmware[tlen],
829 sizeof(struct fw_header));
830 else
831 mwifiex_get_fw_data(adapter, tlen,
832 sizeof(struct fw_header),
833 (u8 *)&fwdata->fw_hdr);
834
835 dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
836 dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
837 tlen += sizeof(struct fw_header);
838
839 if (firmware)
840 memcpy(fwdata->data, &firmware[tlen], dlen);
841 else
842 mwifiex_get_fw_data(adapter, tlen, dlen,
843 (u8 *)fwdata->data);
844
845 fwdata->seq_num = cpu_to_le32(fw_seqnum);
846 tlen += dlen;
847 }
848
849 /* If the send/receive fails or CRC occurs then retry */
850 while (retries--) {
851 u8 *buf = (u8 *)fwdata;
852 u32 len = FW_DATA_XMIT_SIZE;
853
854 /* send the firmware block */
855 ret = mwifiex_write_data_sync(adapter, buf, &len,
856 MWIFIEX_USB_EP_CMD_EVENT,
857 MWIFIEX_USB_TIMEOUT);
858 if (ret) {
859 dev_err(adapter->dev,
860 "write_data_sync: failed: %d\n", ret);
861 continue;
862 }
863
864 buf = recv_buff;
865 len = FW_DNLD_RX_BUF_SIZE;
866
867 /* Receive the firmware block response */
868 ret = mwifiex_read_data_sync(adapter, buf, &len,
869 MWIFIEX_USB_EP_CMD_EVENT,
870 MWIFIEX_USB_TIMEOUT);
871 if (ret) {
872 dev_err(adapter->dev,
873 "read_data_sync: failed: %d\n", ret);
874 continue;
875 }
876
877 memcpy(&sync_fw, recv_buff,
878 sizeof(struct fw_sync_header));
879
880 /* check 1st firmware block resp for highest bit set */
881 if (check_winner) {
882 if (le32_to_cpu(sync_fw.cmd) & 0x80000000) {
883 dev_warn(adapter->dev,
884 "USB is not the winner %#x\n",
885 sync_fw.cmd);
886
887 /* returning success */
888 ret = 0;
889 goto cleanup;
890 }
891
892 dev_dbg(adapter->dev,
893 "USB is the winner, start to download FW\n");
894
895 check_winner = 0;
896 break;
897 }
898
899 /* check the firmware block response for CRC errors */
900 if (sync_fw.cmd) {
901 dev_err(adapter->dev,
902 "FW received block with CRC %#x\n",
903 sync_fw.cmd);
904 ret = -1;
905 continue;
906 }
907
908 retries = USB8797_FW_MAX_RETRY;
909 break;
910 }
911 fw_seqnum++;
912 } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries);
913
914 cleanup:
915 dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen);
916
917 kfree(recv_buff);
918 kfree(fwdata);
919
920 if (retries)
921 ret = 0;
922 fw_exit:
923 return ret;
924 }
925
926 static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter,
927 struct mwifiex_fw_image *fw)
928 {
929 int ret;
930 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
931
932 if (card->usb_boot_state == USB8797_FW_DNLD) {
933 ret = mwifiex_prog_fw_w_helper(adapter, fw);
934 if (ret)
935 return -1;
936
937 /* Boot state changes after successful firmware download */
938 if (card->usb_boot_state == USB8797_FW_DNLD)
939 return -1;
940 }
941
942 ret = mwifiex_usb_rx_init(adapter);
943 if (!ret)
944 ret = mwifiex_usb_tx_init(adapter);
945
946 return ret;
947 }
948
949 static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep)
950 {
951 struct usb_card_rec *card = (struct usb_card_rec *)adapter->card;
952
953 skb_push(card->rx_cmd.skb, INTF_HEADER_LEN);
954 if ((ep == card->rx_cmd_ep) &&
955 (!atomic_read(&card->rx_cmd_urb_pending)))
956 mwifiex_usb_submit_rx_urb(&card->rx_cmd,
957 MWIFIEX_RX_CMD_BUF_SIZE);
958
959 return;
960 }
961
962 static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter,
963 struct sk_buff *skb)
964 {
965 atomic_dec(&adapter->rx_pending);
966 mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT);
967
968 return 0;
969 }
970
971 static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter,
972 struct sk_buff *skb)
973 {
974 atomic_dec(&adapter->rx_pending);
975 dev_kfree_skb_any(skb);
976
977 return 0;
978 }
979
980 /* This function wakes up the card. */
981 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
982 {
983 /* Simulation of HS_AWAKE event */
984 adapter->pm_wakeup_fw_try = false;
985 adapter->pm_wakeup_card_req = false;
986 adapter->ps_state = PS_STATE_AWAKE;
987
988 return 0;
989 }
990
991 static struct mwifiex_if_ops usb_ops = {
992 .register_dev = mwifiex_register_dev,
993 .wakeup = mwifiex_pm_wakeup_card,
994 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
995
996 /* USB specific */
997 .dnld_fw = mwifiex_usb_dnld_fw,
998 .cmdrsp_complete = mwifiex_usb_cmd_event_complete,
999 .event_complete = mwifiex_usb_cmd_event_complete,
1000 .data_complete = mwifiex_usb_data_complete,
1001 .host_to_card = mwifiex_usb_host_to_card,
1002 };
1003
1004 /* This function initializes the USB driver module.
1005 *
1006 * This initiates the semaphore and registers the device with
1007 * USB bus.
1008 */
1009 static int mwifiex_usb_init_module(void)
1010 {
1011 int ret;
1012
1013 pr_debug("Marvell USB8797 Driver\n");
1014
1015 sema_init(&add_remove_card_sem, 1);
1016
1017 ret = usb_register(&mwifiex_usb_driver);
1018 if (ret)
1019 pr_err("Driver register failed!\n");
1020 else
1021 pr_debug("info: Driver registered successfully!\n");
1022
1023 return ret;
1024 }
1025
1026 /* This function cleans up the USB driver.
1027 *
1028 * The following major steps are followed in .disconnect for cleanup:
1029 * - Resume the device if its suspended
1030 * - Disconnect the device if connected
1031 * - Shutdown the firmware
1032 * - Unregister the device from USB bus.
1033 */
1034 static void mwifiex_usb_cleanup_module(void)
1035 {
1036 if (!down_interruptible(&add_remove_card_sem))
1037 up(&add_remove_card_sem);
1038
1039 /* set the flag as user is removing this module */
1040 user_rmmod = 1;
1041
1042 usb_deregister(&mwifiex_usb_driver);
1043 }
1044
1045 module_init(mwifiex_usb_init_module);
1046 module_exit(mwifiex_usb_cleanup_module);
1047
1048 MODULE_AUTHOR("Marvell International Ltd.");
1049 MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION);
1050 MODULE_VERSION(USB_VERSION);
1051 MODULE_LICENSE("GPL v2");
1052 MODULE_FIRMWARE("mrvl/usb8797_uapsta.bin");
Linux kernel - Deliverables
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