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[PATCH] libertas: fix sparse-reported problems
[wrt350n-kernel.git] / drivers / net / wireless / libertas / if_usb.c
blob364eae374b935d44617928c7b8d80ad146dca776
1 /**
2 * This file contains functions used in USB interface module.
3 */
4 #include <linux/delay.h>
5 #include <linux/moduleparam.h>
6 #include <linux/firmware.h>
7 #include <linux/netdevice.h>
8 #include <linux/list.h>
9 #include <linux/usb.h>
10
11 #define DRV_NAME "usb8xxx"
12
13 #include "host.h"
14 #include "decl.h"
15 #include "defs.h"
16 #include "dev.h"
17 #include "if_usb.h"
18 #include "decl.h"
19
20 #define MESSAGE_HEADER_LEN 4
21
22 static const char usbdriver_name[] = "usb8xxx";
23 static u8 *default_fw_name = "usb8388.bin";
24
25 static char *libertas_fw_name = NULL;
26 module_param_named(fw_name, libertas_fw_name, charp, 0644);
27
28 /*
29 * We need to send a RESET command to all USB devices before
30 * we tear down the USB connection. Otherwise we would not
31 * be able to re-init device the device if the module gets
32 * loaded again. This is a list of all initialized USB devices,
33 * for the reset code see if_usb_reset_device()
34 */
35 static LIST_HEAD(usb_devices);
36
37 static struct usb_device_id if_usb_table[] = {
38 /* Enter the device signature inside */
39 { USB_DEVICE(0x1286, 0x2001) },
40 { USB_DEVICE(0x05a3, 0x8388) },
41 {} /* Terminating entry */
42 };
43
44 MODULE_DEVICE_TABLE(usb, if_usb_table);
45
46 static void if_usb_receive(struct urb *urb);
47 static void if_usb_receive_fwload(struct urb *urb);
48 static int if_usb_register_dev(wlan_private * priv);
49 static int if_usb_unregister_dev(wlan_private *);
50 static int if_usb_prog_firmware(wlan_private *);
51 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
52 static int if_usb_get_int_status(wlan_private * priv, u8 *);
53 static int if_usb_read_event_cause(wlan_private *);
54 static int usb_tx_block(wlan_private *priv, u8 *payload, u16 nb);
55 static void if_usb_free(struct usb_card_rec *cardp);
56
57 /**
58 * @brief call back function to handle the status of the URB
59 * @param urb pointer to urb structure
60 * @return N/A
61 */
62 static void if_usb_write_bulk_callback(struct urb *urb)
63 {
64 wlan_private *priv = (wlan_private *) (urb->context);
65 wlan_adapter *adapter = priv->adapter;
66 struct net_device *dev = priv->dev;
67
68 /* handle the transmission complete validations */
69
70 if (urb->status != 0) {
71 /* print the failure status number for debug */
72 lbs_pr_info("URB in failure status: %d\n", urb->status);
73 } else {
74 /*
75 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
76 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
77 urb->actual_length);
78 */
79 priv->dnld_sent = DNLD_RES_RECEIVED;
80 /* Wake main thread if commands are pending */
81 if (!adapter->cur_cmd)
82 wake_up_interruptible(&priv->waitq);
83 if ((adapter->connect_status == LIBERTAS_CONNECTED)) {
84 netif_wake_queue(dev);
85 netif_wake_queue(priv->mesh_dev);
86 }
87 }
88
89 return;
90 }
91
92 /**
93 * @brief free tx/rx urb, skb and rx buffer
94 * @param cardp pointer usb_card_rec
95 * @return N/A
96 */
97 static void if_usb_free(struct usb_card_rec *cardp)
98 {
99 lbs_deb_enter(LBS_DEB_USB);
100
101 /* Unlink tx & rx urb */
102 usb_kill_urb(cardp->tx_urb);
103 usb_kill_urb(cardp->rx_urb);
104
105 usb_free_urb(cardp->tx_urb);
106 cardp->tx_urb = NULL;
107
108 usb_free_urb(cardp->rx_urb);
109 cardp->rx_urb = NULL;
110
111 kfree(cardp->bulk_out_buffer);
112 cardp->bulk_out_buffer = NULL;
113
114 lbs_deb_leave(LBS_DEB_USB);
115 }
116
117 /**
118 * @brief sets the configuration values
119 * @param ifnum interface number
120 * @param id pointer to usb_device_id
121 * @return 0 on success, error code on failure
122 */
123 static int if_usb_probe(struct usb_interface *intf,
124 const struct usb_device_id *id)
125 {
126 struct usb_device *udev;
127 struct usb_host_interface *iface_desc;
128 struct usb_endpoint_descriptor *endpoint;
129 wlan_private *priv;
130 struct usb_card_rec *cardp;
131 int i;
132
133 udev = interface_to_usbdev(intf);
134
135 cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
136 if (!cardp) {
137 lbs_pr_err("Out of memory allocating private data.\n");
138 goto error;
139 }
140
141 cardp->udev = udev;
142 iface_desc = intf->cur_altsetting;
143
144 lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
145 " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
146 le16_to_cpu(udev->descriptor.bcdUSB),
147 udev->descriptor.bDeviceClass,
148 udev->descriptor.bDeviceSubClass,
149 udev->descriptor.bDeviceProtocol);
150
151 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
152 endpoint = &iface_desc->endpoint[i].desc;
153 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
154 && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
155 USB_ENDPOINT_XFER_BULK)) {
156 /* we found a bulk in endpoint */
157 lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
158 le16_to_cpu(endpoint->wMaxPacketSize));
159 if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
160 lbs_deb_usbd(&udev->dev,
161 "Rx URB allocation failed\n");
162 goto dealloc;
163 }
164 cardp->rx_urb_recall = 0;
165
166 cardp->bulk_in_size =
167 le16_to_cpu(endpoint->wMaxPacketSize);
168 cardp->bulk_in_endpointAddr =
169 (endpoint->
170 bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
171 lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
172 endpoint->bEndpointAddress);
173 }
174
175 if (((endpoint->
176 bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
177 USB_DIR_OUT)
178 && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
179 USB_ENDPOINT_XFER_BULK)) {
180 /* We found bulk out endpoint */
181 if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
182 lbs_deb_usbd(&udev->dev,
183 "Tx URB allocation failed\n");
184 goto dealloc;
185 }
186
187 cardp->bulk_out_size =
188 le16_to_cpu(endpoint->wMaxPacketSize);
189 lbs_deb_usbd(&udev->dev,
190 "Bulk out size is %d\n",
191 le16_to_cpu(endpoint->wMaxPacketSize));
192 cardp->bulk_out_endpointAddr =
193 endpoint->bEndpointAddress;
194 lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
195 endpoint->bEndpointAddress);
196 cardp->bulk_out_buffer =
197 kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
198 GFP_KERNEL);
199
200 if (!cardp->bulk_out_buffer) {
201 lbs_deb_usbd(&udev->dev,
202 "Could not allocate buffer\n");
203 goto dealloc;
204 }
205 }
206 }
207
208 if (!(priv = libertas_add_card(cardp, &udev->dev)))
209 goto dealloc;
210
211 udev->dev.driver_data = priv;
212
213 if (libertas_add_mesh(priv, &udev->dev))
214 goto err_add_mesh;
215
216 priv->hw_register_dev = if_usb_register_dev;
217 priv->hw_unregister_dev = if_usb_unregister_dev;
218 priv->hw_prog_firmware = if_usb_prog_firmware;
219 priv->hw_host_to_card = if_usb_host_to_card;
220 priv->hw_get_int_status = if_usb_get_int_status;
221 priv->hw_read_event_cause = if_usb_read_event_cause;
222 priv->boot2_version = udev->descriptor.bcdDevice;
223
224 if (libertas_activate_card(priv))
225 goto err_activate_card;
226
227 list_add_tail(&cardp->list, &usb_devices);
228
229 usb_get_dev(udev);
230 usb_set_intfdata(intf, cardp);
231
232 return 0;
233
234 err_activate_card:
235 libertas_remove_mesh(priv);
236 err_add_mesh:
237 free_netdev(priv->dev);
238 kfree(priv->adapter);
239 dealloc:
240 if_usb_free(cardp);
241
242 error:
243 return -ENOMEM;
244 }
245
246 /**
247 * @brief free resource and cleanup
248 * @param intf USB interface structure
249 * @return N/A
250 */
251 static void if_usb_disconnect(struct usb_interface *intf)
252 {
253 struct usb_card_rec *cardp = usb_get_intfdata(intf);
254 wlan_private *priv = (wlan_private *) cardp->priv;
255 wlan_adapter *adapter = NULL;
256
257 adapter = priv->adapter;
258
259 /*
260 * Update Surprise removed to TRUE
261 */
262 adapter->surpriseremoved = 1;
263
264 list_del(&cardp->list);
265
266 /* card is removed and we can call wlan_remove_card */
267 lbs_deb_usbd(&cardp->udev->dev, "call remove card\n");
268 libertas_remove_mesh(priv);
269 libertas_remove_card(priv);
270
271 /* Unlink and free urb */
272 if_usb_free(cardp);
273
274 usb_set_intfdata(intf, NULL);
275 usb_put_dev(interface_to_usbdev(intf));
276
277 return;
278 }
279
280 /**
281 * @brief This function download FW
282 * @param priv pointer to wlan_private
283 * @return 0
284 */
285 static int if_prog_firmware(wlan_private * priv)
286 {
287 struct usb_card_rec *cardp = priv->card;
288 struct FWData *fwdata;
289 struct fwheader *fwheader;
290 u8 *firmware = priv->firmware->data;
291
292 fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
293
294 if (!fwdata)
295 return -1;
296
297 fwheader = &fwdata->fwheader;
298
299 if (!cardp->CRC_OK) {
300 cardp->totalbytes = cardp->fwlastblksent;
301 cardp->fwseqnum = cardp->lastseqnum - 1;
302 }
303
304 /*
305 lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
306 cardp->totalbytes);
307 */
308
309 memcpy(fwheader, &firmware[cardp->totalbytes],
310 sizeof(struct fwheader));
311
312 cardp->fwlastblksent = cardp->totalbytes;
313 cardp->totalbytes += sizeof(struct fwheader);
314
315 /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
316 memcpy(fwdata->data, &firmware[cardp->totalbytes],
317 le32_to_cpu(fwdata->fwheader.datalength));
318
319 /*
320 lbs_deb_usbd(&cardp->udev->dev,
321 "Data length = %d\n", le32_to_cpu(fwdata->fwheader.datalength));
322 */
323
324 cardp->fwseqnum = cardp->fwseqnum + 1;
325
326 fwdata->seqnum = cpu_to_le32(cardp->fwseqnum);
327 cardp->lastseqnum = cardp->fwseqnum;
328 cardp->totalbytes += le32_to_cpu(fwdata->fwheader.datalength);
329
330 if (fwheader->dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
331 /*
332 lbs_deb_usbd(&cardp->udev->dev, "There are data to follow\n");
333 lbs_deb_usbd(&cardp->udev->dev,
334 "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
335 cardp->totalbytes);
336 */
337 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
338 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
339
340 } else if (fwdata->fwheader.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
341 /*
342 lbs_deb_usbd(&cardp->udev->dev,
343 "Host has finished FW downloading\n");
344 lbs_deb_usbd(&cardp->udev->dev,
345 "Donwloading FW JUMP BLOCK\n");
346 */
347 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
348 usb_tx_block(priv, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
349 cardp->fwfinalblk = 1;
350 }
351
352 /*
353 lbs_deb_usbd(&cardp->udev->dev,
354 "The firmware download is done size is %d\n",
355 cardp->totalbytes);
356 */
357
358 kfree(fwdata);
359
360 return 0;
361 }
362
363 static int if_usb_reset_device(wlan_private *priv)
364 {
365 int ret;
366 struct usb_card_rec *cardp = priv->card;
367
368 lbs_deb_enter(LBS_DEB_USB);
369
370 /* Try a USB port reset first, if that fails send the reset
371 * command to the firmware.
372 */
373 ret = usb_reset_device(cardp->udev);
374 if (!ret) {
375 msleep(10);
376 ret = libertas_reset_device(priv);
377 msleep(10);
378 }
379
380 lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
381
382 return ret;
383 }
384
385 /**
386 * @brief This function transfer the data to the device.
387 * @param priv pointer to wlan_private
388 * @param payload pointer to payload data
389 * @param nb data length
390 * @return 0 or -1
391 */
392 static int usb_tx_block(wlan_private * priv, u8 * payload, u16 nb)
393 {
394 /* pointer to card structure */
395 struct usb_card_rec *cardp = priv->card;
396 int ret = -1;
397
398 /* check if device is removed */
399 if (priv->adapter->surpriseremoved) {
400 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
401 goto tx_ret;
402 }
403
404 usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
405 usb_sndbulkpipe(cardp->udev,
406 cardp->bulk_out_endpointAddr),
407 payload, nb, if_usb_write_bulk_callback, priv);
408
409 cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
410
411 if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
412 /* transfer failed */
413 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
414 ret = -1;
415 } else {
416 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
417 ret = 0;
418 }
419
420 tx_ret:
421 return ret;
422 }
423
424 static int __if_usb_submit_rx_urb(wlan_private * priv,
425 void (*callbackfn)
426 (struct urb *urb))
427 {
428 struct usb_card_rec *cardp = priv->card;
429 struct sk_buff *skb;
430 struct read_cb_info *rinfo = &cardp->rinfo;
431 int ret = -1;
432
433 if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
434 lbs_pr_err("No free skb\n");
435 goto rx_ret;
436 }
437
438 rinfo->skb = skb;
439
440 /* Fill the receive configuration URB and initialise the Rx call back */
441 usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
442 usb_rcvbulkpipe(cardp->udev,
443 cardp->bulk_in_endpointAddr),
444 (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
445 MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
446 rinfo);
447
448 cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
449
450 /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
451 if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
452 /* handle failure conditions */
453 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
454 ret = -1;
455 } else {
456 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
457 ret = 0;
458 }
459
460 rx_ret:
461 return ret;
462 }
463
464 static inline int if_usb_submit_rx_urb_fwload(wlan_private * priv)
465 {
466 return __if_usb_submit_rx_urb(priv, &if_usb_receive_fwload);
467 }
468
469 static inline int if_usb_submit_rx_urb(wlan_private * priv)
470 {
471 return __if_usb_submit_rx_urb(priv, &if_usb_receive);
472 }
473
474 static void if_usb_receive_fwload(struct urb *urb)
475 {
476 struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
477 wlan_private *priv = rinfo->priv;
478 struct sk_buff *skb = rinfo->skb;
479 struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
480 struct fwsyncheader *syncfwheader;
481 struct bootcmdrespStr bootcmdresp;
482
483 if (urb->status) {
484 lbs_deb_usbd(&cardp->udev->dev,
485 "URB status is failed during fw load\n");
486 kfree_skb(skb);
487 return;
488 }
489
490 if (cardp->bootcmdresp == 0) {
491 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
492 sizeof(bootcmdresp));
493 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
494 kfree_skb(skb);
495 if_usb_submit_rx_urb_fwload(priv);
496 cardp->bootcmdresp = 1;
497 lbs_deb_usbd(&cardp->udev->dev,
498 "Received valid boot command response\n");
499 return;
500 }
501 if (bootcmdresp.u32magicnumber != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
502 lbs_pr_info(
503 "boot cmd response wrong magic number (0x%x)\n",
504 le32_to_cpu(bootcmdresp.u32magicnumber));
505 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
506 lbs_pr_info(
507 "boot cmd response cmd_tag error (%d)\n",
508 bootcmdresp.u8cmd_tag);
509 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
510 lbs_pr_info(
511 "boot cmd response result error (%d)\n",
512 bootcmdresp.u8result);
513 } else {
514 cardp->bootcmdresp = 1;
515 lbs_deb_usbd(&cardp->udev->dev,
516 "Received valid boot command response\n");
517 }
518 kfree_skb(skb);
519 if_usb_submit_rx_urb_fwload(priv);
520 return;
521 }
522
523 syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
524 if (!syncfwheader) {
525 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
526 kfree_skb(skb);
527 return;
528 }
529
530 memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
531 sizeof(struct fwsyncheader));
532
533 if (!syncfwheader->cmd) {
534 /*
535 lbs_deb_usbd(&cardp->udev->dev,
536 "FW received Blk with correct CRC\n");
537 lbs_deb_usbd(&cardp->udev->dev,
538 "FW received Blk seqnum = %d\n",
539 syncfwheader->seqnum);
540 */
541 cardp->CRC_OK = 1;
542 } else {
543 lbs_deb_usbd(&cardp->udev->dev,
544 "FW received Blk with CRC error\n");
545 cardp->CRC_OK = 0;
546 }
547
548 kfree_skb(skb);
549
550 if (cardp->fwfinalblk) {
551 cardp->fwdnldover = 1;
552 goto exit;
553 }
554
555 if_prog_firmware(priv);
556
557 if_usb_submit_rx_urb_fwload(priv);
558 exit:
559 kfree(syncfwheader);
560
561 return;
562
563 }
564
565 #define MRVDRV_MIN_PKT_LEN 30
566
567 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
568 struct usb_card_rec *cardp,
569 wlan_private *priv)
570 {
571 if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
572 MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
573 lbs_deb_usbd(&cardp->udev->dev,
574 "Packet length is Invalid\n");
575 kfree_skb(skb);
576 return;
577 }
578
579 skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
580 skb_put(skb, recvlength);
581 skb_pull(skb, MESSAGE_HEADER_LEN);
582 libertas_process_rxed_packet(priv, skb);
583 priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
584 }
585
586 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
587 struct sk_buff *skb,
588 struct usb_card_rec *cardp,
589 wlan_private *priv)
590 {
591 u8 *cmdbuf;
592 if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
593 lbs_deb_usbd(&cardp->udev->dev,
594 "The receive buffer is too large\n");
595 kfree_skb(skb);
596 return;
597 }
598
599 if (!in_interrupt())
600 BUG();
601
602 spin_lock(&priv->adapter->driver_lock);
603 /* take care of cur_cmd = NULL case by reading the
604 * data to clear the interrupt */
605 if (!priv->adapter->cur_cmd) {
606 cmdbuf = priv->upld_buf;
607 priv->adapter->hisregcpy &= ~MRVDRV_CMD_UPLD_RDY;
608 } else
609 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
610
611 cardp->usb_int_cause |= MRVDRV_CMD_UPLD_RDY;
612 priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
613 memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
614 priv->upld_len);
615
616 kfree_skb(skb);
617 libertas_interrupt(priv->dev);
618 spin_unlock(&priv->adapter->driver_lock);
619
620 lbs_deb_usbd(&cardp->udev->dev,
621 "Wake up main thread to handle cmd response\n");
622
623 return;
624 }
625
626 /**
627 * @brief This function reads of the packet into the upload buff,
628 * wake up the main thread and initialise the Rx callack.
629 *
630 * @param urb pointer to struct urb
631 * @return N/A
632 */
633 static void if_usb_receive(struct urb *urb)
634 {
635 struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
636 wlan_private *priv = rinfo->priv;
637 struct sk_buff *skb = rinfo->skb;
638 struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
639
640 int recvlength = urb->actual_length;
641 u8 *recvbuff = NULL;
642 u32 recvtype = 0;
643
644 lbs_deb_enter(LBS_DEB_USB);
645
646 if (recvlength) {
647 __le32 tmp;
648
649 if (urb->status) {
650 lbs_deb_usbd(&cardp->udev->dev,
651 "URB status is failed\n");
652 kfree_skb(skb);
653 goto setup_for_next;
654 }
655
656 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
657 memcpy(&tmp, recvbuff, sizeof(u32));
658 recvtype = le32_to_cpu(tmp);
659 lbs_deb_usbd(&cardp->udev->dev,
660 "Recv length = 0x%x, Recv type = 0x%X\n",
661 recvlength, recvtype);
662 } else if (urb->status)
663 goto rx_exit;
664
665 switch (recvtype) {
666 case CMD_TYPE_DATA:
667 process_cmdtypedata(recvlength, skb, cardp, priv);
668 break;
669
670 case CMD_TYPE_REQUEST:
671 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
672 break;
673
674 case CMD_TYPE_INDICATION:
675 /* Event cause handling */
676 spin_lock(&priv->adapter->driver_lock);
677 cardp->usb_event_cause = le32_to_cpu(*(__le32 *) (recvbuff + MESSAGE_HEADER_LEN));
678 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
679 cardp->usb_event_cause);
680 if (cardp->usb_event_cause & 0xffff0000) {
681 libertas_send_tx_feedback(priv);
682 spin_unlock(&priv->adapter->driver_lock);
683 break;
684 }
685 cardp->usb_event_cause <<= 3;
686 cardp->usb_int_cause |= MRVDRV_CARDEVENT;
687 kfree_skb(skb);
688 libertas_interrupt(priv->dev);
689 spin_unlock(&priv->adapter->driver_lock);
690 goto rx_exit;
691 default:
692 lbs_deb_usbd(&cardp->udev->dev, "Unknown command type 0x%X\n",
693 recvtype);
694 kfree_skb(skb);
695 break;
696 }
697
698 setup_for_next:
699 if_usb_submit_rx_urb(priv);
700 rx_exit:
701 lbs_deb_leave(LBS_DEB_USB);
702 }
703
704 /**
705 * @brief This function downloads data to FW
706 * @param priv pointer to wlan_private structure
707 * @param type type of data
708 * @param buf pointer to data buffer
709 * @param len number of bytes
710 * @return 0 or -1
711 */
712 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
713 {
714 struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
715
716 lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
717 lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
718
719 if (type == MVMS_CMD) {
720 __le32 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
721 priv->dnld_sent = DNLD_CMD_SENT;
722 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
723 MESSAGE_HEADER_LEN);
724
725 } else {
726 __le32 tmp = cpu_to_le32(CMD_TYPE_DATA);
727 priv->dnld_sent = DNLD_DATA_SENT;
728 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
729 MESSAGE_HEADER_LEN);
730 }
731
732 memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
733
734 return usb_tx_block(priv, cardp->bulk_out_buffer,
735 nb + MESSAGE_HEADER_LEN);
736 }
737
738 /* called with adapter->driver_lock held */
739 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
740 {
741 struct usb_card_rec *cardp = priv->card;
742
743 *ireg = cardp->usb_int_cause;
744 cardp->usb_int_cause = 0;
745
746 lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
747
748 return 0;
749 }
750
751 static int if_usb_read_event_cause(wlan_private * priv)
752 {
753 struct usb_card_rec *cardp = priv->card;
754 priv->adapter->eventcause = cardp->usb_event_cause;
755 /* Re-submit rx urb here to avoid event lost issue */
756 if_usb_submit_rx_urb(priv);
757 return 0;
758 }
759
760 static int if_usb_unregister_dev(wlan_private * priv)
761 {
762 int ret = 0;
763
764 /* Need to send a Reset command to device before USB resources freed
765 * and wlan_remove_card() called, then device can handle FW download
766 * again.
767 */
768 if (priv)
769 libertas_reset_device(priv);
770
771 return ret;
772 }
773
774
775 /**
776 * @brief This function register usb device and initialize parameter
777 * @param priv pointer to wlan_private
778 * @return 0 or -1
779 */
780 static int if_usb_register_dev(wlan_private * priv)
781 {
782 struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
783
784 lbs_deb_enter(LBS_DEB_USB);
785
786 cardp->priv = priv;
787 cardp->eth_dev = priv->dev;
788 priv->hotplug_device = &(cardp->udev->dev);
789
790 lbs_deb_usbd(&cardp->udev->dev, "udev pointer is at %p\n",
791 cardp->udev);
792
793 lbs_deb_leave(LBS_DEB_USB);
794 return 0;
795 }
796
797 /**
798 * @brief This function issues Boot command to the Boot2 code
799 * @param ivalue 1:Boot from FW by USB-Download
800 * 2:Boot from FW in EEPROM
801 * @return 0
802 */
803 static int if_usb_issue_boot_command(wlan_private *priv, int ivalue)
804 {
805 struct usb_card_rec *cardp = priv->card;
806 struct bootcmdstr sbootcmd;
807 int i;
808
809 /* Prepare command */
810 sbootcmd.u32magicnumber = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
811 sbootcmd.u8cmd_tag = ivalue;
812 for (i=0; i<11; i++)
813 sbootcmd.au8dumy[i]=0x00;
814 memcpy(cardp->bulk_out_buffer, &sbootcmd, sizeof(struct bootcmdstr));
815
816 /* Issue command */
817 usb_tx_block(priv, cardp->bulk_out_buffer, sizeof(struct bootcmdstr));
818
819 return 0;
820 }
821
822
823 static int if_usb_do_prog_firmware(wlan_private * priv)
824 {
825 struct usb_card_rec *cardp = priv->card;
826 int i = 0;
827 static int reset_count = 10;
828 int ret = 0;
829
830 lbs_deb_enter(LBS_DEB_USB);
831
832 cardp->rinfo.priv = priv;
833
834 restart:
835 if (if_usb_submit_rx_urb_fwload(priv) < 0) {
836 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
837 ret = -1;
838 goto done;
839 }
840
841 cardp->bootcmdresp = 0;
842 do {
843 int j = 0;
844 i++;
845 /* Issue Boot command = 1, Boot from Download-FW */
846 if_usb_issue_boot_command(priv, BOOT_CMD_FW_BY_USB);
847 /* wait for command response */
848 do {
849 j++;
850 msleep_interruptible(100);
851 } while (cardp->bootcmdresp == 0 && j < 10);
852 } while (cardp->bootcmdresp == 0 && i < 5);
853
854 if (cardp->bootcmdresp == 0) {
855 if (--reset_count >= 0) {
856 if_usb_reset_device(priv);
857 goto restart;
858 }
859 return -1;
860 }
861
862 i = 0;
863 priv->adapter->fw_ready = 0;
864
865 cardp->totalbytes = 0;
866 cardp->fwlastblksent = 0;
867 cardp->CRC_OK = 1;
868 cardp->fwdnldover = 0;
869 cardp->fwseqnum = -1;
870 cardp->totalbytes = 0;
871 cardp->fwfinalblk = 0;
872
873 if_prog_firmware(priv);
874
875 do {
876 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
877 i++;
878 msleep_interruptible(100);
879 if (priv->adapter->surpriseremoved || i >= 20)
880 break;
881 } while (!cardp->fwdnldover);
882
883 if (!cardp->fwdnldover) {
884 lbs_pr_info("failed to load fw, resetting device!\n");
885 if (--reset_count >= 0) {
886 if_usb_reset_device(priv);
887 goto restart;
888 }
889
890 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
891 ret = -1;
892 goto done;
893 }
894
895 if_usb_submit_rx_urb(priv);
896
897 /* Delay 200 ms to waiting for the FW ready */
898 msleep_interruptible(200);
899
900 priv->adapter->fw_ready = 1;
901
902 done:
903 lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
904 return ret;
905 }
906
907 /**
908 * @brief This function checks the validity of Boot2/FW image.
909 *
910 * @param data pointer to image
911 * len image length
912 * @return 0 or -1
913 */
914 static int check_fwfile_format(u8 *data, u32 totlen)
915 {
916 u32 bincmd, exit;
917 u32 blksize, offset, len;
918 int ret;
919
920 ret = 1;
921 exit = len = 0;
922
923 do {
924 struct fwheader *fwh = (void *)data;
925
926 bincmd = le32_to_cpu(fwh->dnldcmd);
927 blksize = le32_to_cpu(fwh->datalength);
928 switch (bincmd) {
929 case FW_HAS_DATA_TO_RECV:
930 offset = sizeof(struct fwheader) + blksize;
931 data += offset;
932 len += offset;
933 if (len >= totlen)
934 exit = 1;
935 break;
936 case FW_HAS_LAST_BLOCK:
937 exit = 1;
938 ret = 0;
939 break;
940 default:
941 exit = 1;
942 break;
943 }
944 } while (!exit);
945
946 if (ret)
947 lbs_pr_err("firmware file format check FAIL\n");
948 else
949 lbs_deb_fw("firmware file format check PASS\n");
950
951 return ret;
952 }
953
954
955 static int if_usb_prog_firmware(wlan_private *priv)
956 {
957 int ret = -1;
958
959 lbs_deb_enter(LBS_DEB_FW);
960
961 if ((ret = request_firmware(&priv->firmware, libertas_fw_name,
962 priv->hotplug_device)) < 0) {
963 lbs_pr_err("request_firmware() failed with %#x\n", ret);
964 lbs_pr_err("firmware %s not found\n", libertas_fw_name);
965 goto done;
966 }
967
968 if (check_fwfile_format(priv->firmware->data, priv->firmware->size)) {
969 release_firmware(priv->firmware);
970 goto done;
971 }
972
973 ret = if_usb_do_prog_firmware(priv);
974
975 release_firmware(priv->firmware);
976 done:
977 return ret;
978 }
979
980
981 #ifdef CONFIG_PM
982 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
983 {
984 struct usb_card_rec *cardp = usb_get_intfdata(intf);
985 wlan_private *priv = cardp->priv;
986
987 lbs_deb_enter(LBS_DEB_USB);
988
989 if (priv->adapter->psstate != PS_STATE_FULL_POWER)
990 return -1;
991
992 if (priv->mesh_dev && !priv->mesh_autostart_enabled) {
993 /* Mesh autostart must be activated while sleeping
994 * On resume it will go back to the current state
995 */
996 struct cmd_ds_mesh_access mesh_access;
997 memset(&mesh_access, 0, sizeof(mesh_access));
998 mesh_access.data[0] = cpu_to_le32(1);
999 libertas_prepare_and_send_command(priv,
1000 CMD_MESH_ACCESS,
1001 CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
1002 CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
1003 }
1004
1005 netif_device_detach(cardp->eth_dev);
1006 netif_device_detach(priv->mesh_dev);
1007
1008 /* Unlink tx & rx urb */
1009 usb_kill_urb(cardp->tx_urb);
1010 usb_kill_urb(cardp->rx_urb);
1011
1012 cardp->rx_urb_recall = 1;
1013
1014 lbs_deb_leave(LBS_DEB_USB);
1015 return 0;
1016 }
1017
1018 static int if_usb_resume(struct usb_interface *intf)
1019 {
1020 struct usb_card_rec *cardp = usb_get_intfdata(intf);
1021 wlan_private *priv = cardp->priv;
1022
1023 lbs_deb_enter(LBS_DEB_USB);
1024
1025 cardp->rx_urb_recall = 0;
1026
1027 if_usb_submit_rx_urb(cardp->priv);
1028
1029 netif_device_attach(cardp->eth_dev);
1030 netif_device_attach(priv->mesh_dev);
1031
1032 if (priv->mesh_dev && !priv->mesh_autostart_enabled) {
1033 /* Mesh autostart was activated while sleeping
1034 * Disable it if appropriate
1035 */
1036 struct cmd_ds_mesh_access mesh_access;
1037 memset(&mesh_access, 0, sizeof(mesh_access));
1038 mesh_access.data[0] = cpu_to_le32(0);
1039 libertas_prepare_and_send_command(priv,
1040 CMD_MESH_ACCESS,
1041 CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
1042 CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
1043 }
1044
1045 lbs_deb_leave(LBS_DEB_USB);
1046 return 0;
1047 }
1048 #else
1049 #define if_usb_suspend NULL
1050 #define if_usb_resume NULL
1051 #endif
1052
1053 static struct usb_driver if_usb_driver = {
1054 /* driver name */
1055 .name = usbdriver_name,
1056 /* probe function name */
1057 .probe = if_usb_probe,
1058 /* disconnect function name */
1059 .disconnect = if_usb_disconnect,
1060 /* device signature table */
1061 .id_table = if_usb_table,
1062 .suspend = if_usb_suspend,
1063 .resume = if_usb_resume,
1064 };
1065
1066 static int if_usb_init_module(void)
1067 {
1068 int ret = 0;
1069
1070 lbs_deb_enter(LBS_DEB_MAIN);
1071
1072 if (libertas_fw_name == NULL) {
1073 libertas_fw_name = default_fw_name;
1074 }
1075
1076 ret = usb_register(&if_usb_driver);
1077
1078 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1079 return ret;
1080 }
1081
1082 static void if_usb_exit_module(void)
1083 {
1084 struct usb_card_rec *cardp, *cardp_temp;
1085
1086 lbs_deb_enter(LBS_DEB_MAIN);
1087
1088 list_for_each_entry_safe(cardp, cardp_temp, &usb_devices, list)
1089 libertas_reset_device((wlan_private *) cardp->priv);
1090
1091 /* API unregisters the driver from USB subsystem */
1092 usb_deregister(&if_usb_driver);
1093
1094 lbs_deb_leave(LBS_DEB_MAIN);
1095 }
1096
1097 module_init(if_usb_init_module);
1098 module_exit(if_usb_exit_module);
1099
1100 MODULE_DESCRIPTION("8388 USB WLAN Driver");
1101 MODULE_AUTHOR("Marvell International Ltd.");
1102 MODULE_LICENSE("GPL");
WRT350N Kernel Patches