Merge branch 'master' of git://git.infradead.org/~dedekind/ubi-2.6
[linux-2.6] / drivers / net / wireless / libertas / if_usb.c
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
19 #define MESSAGE_HEADER_LEN      4
20
21 static const char usbdriver_name[] = "usb8xxx";
22 static u8 *default_fw_name = "usb8388.bin";
23
24 static char *libertas_fw_name = NULL;
25 module_param_named(fw_name, libertas_fw_name, charp, 0644);
26
27 /*
28  * We need to send a RESET command to all USB devices before
29  * we tear down the USB connection. Otherwise we would not
30  * be able to re-init device the device if the module gets
31  * loaded again. This is a list of all initialized USB devices,
32  * for the reset code see if_usb_reset_device()
33 */
34 static LIST_HEAD(usb_devices);
35
36 static struct usb_device_id if_usb_table[] = {
37         /* Enter the device signature inside */
38         { USB_DEVICE(0x1286, 0x2001) },
39         { USB_DEVICE(0x05a3, 0x8388) },
40         {}      /* Terminating entry */
41 };
42
43 MODULE_DEVICE_TABLE(usb, if_usb_table);
44
45 static void if_usb_receive(struct urb *urb);
46 static void if_usb_receive_fwload(struct urb *urb);
47 static int if_usb_prog_firmware(struct usb_card_rec *cardp);
48 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb);
49 static int if_usb_get_int_status(wlan_private * priv, u8 *);
50 static int if_usb_read_event_cause(wlan_private *);
51 static int usb_tx_block(struct usb_card_rec *cardp, u8 *payload, u16 nb);
52 static void if_usb_free(struct usb_card_rec *cardp);
53 static int if_usb_submit_rx_urb(struct usb_card_rec *cardp);
54 static int if_usb_reset_device(struct usb_card_rec *cardp);
55
56 /**
57  *  @brief  call back function to handle the status of the URB
58  *  @param urb          pointer to urb structure
59  *  @return             N/A
60  */
61 static void if_usb_write_bulk_callback(struct urb *urb)
62 {
63         struct usb_card_rec *cardp = (struct usb_card_rec *) urb->context;
64
65         /* handle the transmission complete validations */
66
67         if (urb->status == 0) {
68                 wlan_private *priv = cardp->priv;
69
70                 /*
71                 lbs_deb_usbd(&urb->dev->dev, "URB status is successfull\n");
72                 lbs_deb_usbd(&urb->dev->dev, "Actual length transmitted %d\n",
73                        urb->actual_length);
74                 */
75
76                 /* Used for both firmware TX and regular TX.  priv isn't
77                  * valid at firmware load time.
78                  */
79                 if (priv) {
80                         wlan_adapter *adapter = priv->adapter;
81                         struct net_device *dev = priv->dev;
82
83                         priv->dnld_sent = DNLD_RES_RECEIVED;
84
85                         /* Wake main thread if commands are pending */
86                         if (!adapter->cur_cmd)
87                                 wake_up_interruptible(&priv->waitq);
88
89                         if ((adapter->connect_status == LIBERTAS_CONNECTED)) {
90                                 netif_wake_queue(dev);
91                                 netif_wake_queue(priv->mesh_dev);
92                         }
93                 }
94         } else {
95                 /* print the failure status number for debug */
96                 lbs_pr_info("URB in failure status: %d\n", urb->status);
97         }
98
99         return;
100 }
101
102 /**
103  *  @brief  free tx/rx urb, skb and rx buffer
104  *  @param cardp        pointer usb_card_rec
105  *  @return             N/A
106  */
107 static void if_usb_free(struct usb_card_rec *cardp)
108 {
109         lbs_deb_enter(LBS_DEB_USB);
110
111         /* Unlink tx & rx urb */
112         usb_kill_urb(cardp->tx_urb);
113         usb_kill_urb(cardp->rx_urb);
114
115         usb_free_urb(cardp->tx_urb);
116         cardp->tx_urb = NULL;
117
118         usb_free_urb(cardp->rx_urb);
119         cardp->rx_urb = NULL;
120
121         kfree(cardp->bulk_out_buffer);
122         cardp->bulk_out_buffer = NULL;
123
124         lbs_deb_leave(LBS_DEB_USB);
125 }
126
127 /**
128  *  @brief sets the configuration values
129  *  @param ifnum        interface number
130  *  @param id           pointer to usb_device_id
131  *  @return             0 on success, error code on failure
132  */
133 static int if_usb_probe(struct usb_interface *intf,
134                         const struct usb_device_id *id)
135 {
136         struct usb_device *udev;
137         struct usb_host_interface *iface_desc;
138         struct usb_endpoint_descriptor *endpoint;
139         wlan_private *priv;
140         struct usb_card_rec *cardp;
141         int i;
142
143         udev = interface_to_usbdev(intf);
144
145         cardp = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL);
146         if (!cardp) {
147                 lbs_pr_err("Out of memory allocating private data.\n");
148                 goto error;
149         }
150
151         cardp->udev = udev;
152         iface_desc = intf->cur_altsetting;
153
154         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
155                " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
156                      le16_to_cpu(udev->descriptor.bcdUSB),
157                      udev->descriptor.bDeviceClass,
158                      udev->descriptor.bDeviceSubClass,
159                      udev->descriptor.bDeviceProtocol);
160
161         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
162                 endpoint = &iface_desc->endpoint[i].desc;
163                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
164                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
165                         USB_ENDPOINT_XFER_BULK)) {
166                         /* we found a bulk in endpoint */
167                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n",
168                                      le16_to_cpu(endpoint->wMaxPacketSize));
169                         if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
170                                 lbs_deb_usbd(&udev->dev,
171                                        "Rx URB allocation failed\n");
172                                 goto dealloc;
173                         }
174                         cardp->rx_urb_recall = 0;
175
176                         cardp->bulk_in_size =
177                                 le16_to_cpu(endpoint->wMaxPacketSize);
178                         cardp->bulk_in_endpointAddr =
179                             (endpoint->
180                              bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
181                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n",
182                                endpoint->bEndpointAddress);
183                 }
184
185                 if (((endpoint->
186                       bEndpointAddress & USB_ENDPOINT_DIR_MASK) ==
187                      USB_DIR_OUT)
188                     && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
189                         USB_ENDPOINT_XFER_BULK)) {
190                         /* We found bulk out endpoint */
191                         if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
192                                 lbs_deb_usbd(&udev->dev,
193                                        "Tx URB allocation failed\n");
194                                 goto dealloc;
195                         }
196
197                         cardp->bulk_out_size =
198                                 le16_to_cpu(endpoint->wMaxPacketSize);
199                         lbs_deb_usbd(&udev->dev,
200                                      "Bulk out size is %d\n",
201                                      le16_to_cpu(endpoint->wMaxPacketSize));
202                         cardp->bulk_out_endpointAddr =
203                             endpoint->bEndpointAddress;
204                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n",
205                                     endpoint->bEndpointAddress);
206                         cardp->bulk_out_buffer =
207                             kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
208                                     GFP_KERNEL);
209
210                         if (!cardp->bulk_out_buffer) {
211                                 lbs_deb_usbd(&udev->dev,
212                                        "Could not allocate buffer\n");
213                                 goto dealloc;
214                         }
215                 }
216         }
217
218         /* Upload firmware */
219         cardp->rinfo.cardp = cardp;
220         if (if_usb_prog_firmware(cardp)) {
221                 lbs_deb_usbd(&udev->dev, "FW upload failed");
222                 goto err_prog_firmware;
223         }
224
225         if (!(priv = libertas_add_card(cardp, &udev->dev)))
226                 goto err_prog_firmware;
227
228         cardp->priv = priv;
229
230         if (libertas_add_mesh(priv, &udev->dev))
231                 goto err_add_mesh;
232
233         cardp->eth_dev = priv->dev;
234
235         priv->hw_host_to_card = if_usb_host_to_card;
236         priv->hw_get_int_status = if_usb_get_int_status;
237         priv->hw_read_event_cause = if_usb_read_event_cause;
238         priv->boot2_version = udev->descriptor.bcdDevice;
239
240         /* Delay 200 ms to waiting for the FW ready */
241         if_usb_submit_rx_urb(cardp);
242         msleep_interruptible(200);
243         priv->adapter->fw_ready = 1;
244
245         if (libertas_start_card(priv))
246                 goto err_start_card;
247
248         list_add_tail(&cardp->list, &usb_devices);
249
250         usb_get_dev(udev);
251         usb_set_intfdata(intf, cardp);
252
253         return 0;
254
255 err_start_card:
256         libertas_remove_mesh(priv);
257 err_add_mesh:
258         libertas_remove_card(priv);
259 err_prog_firmware:
260         if_usb_reset_device(cardp);
261 dealloc:
262         if_usb_free(cardp);
263
264 error:
265         return -ENOMEM;
266 }
267
268 /**
269  *  @brief free resource and cleanup
270  *  @param intf         USB interface structure
271  *  @return             N/A
272  */
273 static void if_usb_disconnect(struct usb_interface *intf)
274 {
275         struct usb_card_rec *cardp = usb_get_intfdata(intf);
276         wlan_private *priv = (wlan_private *) cardp->priv;
277
278         lbs_deb_enter(LBS_DEB_MAIN);
279
280         /* Update Surprise removed to TRUE */
281         cardp->surprise_removed = 1;
282
283         list_del(&cardp->list);
284
285         if (priv) {
286                 wlan_adapter *adapter = priv->adapter;
287
288                 adapter->surpriseremoved = 1;
289                 libertas_stop_card(priv);
290                 libertas_remove_mesh(priv);
291                 libertas_remove_card(priv);
292         }
293
294         /* Unlink and free urb */
295         if_usb_free(cardp);
296
297         usb_set_intfdata(intf, NULL);
298         usb_put_dev(interface_to_usbdev(intf));
299
300         lbs_deb_leave(LBS_DEB_MAIN);
301 }
302
303 /**
304  *  @brief  This function download FW
305  *  @param priv         pointer to wlan_private
306  *  @return             0
307  */
308 static int if_prog_firmware(struct usb_card_rec *cardp)
309 {
310         struct FWData *fwdata;
311         struct fwheader *fwheader;
312         u8 *firmware = cardp->fw->data;
313
314         fwdata = kmalloc(sizeof(struct FWData), GFP_ATOMIC);
315
316         if (!fwdata)
317                 return -1;
318
319         fwheader = &fwdata->fwheader;
320
321         if (!cardp->CRC_OK) {
322                 cardp->totalbytes = cardp->fwlastblksent;
323                 cardp->fwseqnum = cardp->lastseqnum - 1;
324         }
325
326         /*
327         lbs_deb_usbd(&cardp->udev->dev, "totalbytes = %d\n",
328                     cardp->totalbytes);
329         */
330
331         memcpy(fwheader, &firmware[cardp->totalbytes],
332                sizeof(struct fwheader));
333
334         cardp->fwlastblksent = cardp->totalbytes;
335         cardp->totalbytes += sizeof(struct fwheader);
336
337         /* lbs_deb_usbd(&cardp->udev->dev,"Copy Data\n"); */
338         memcpy(fwdata->data, &firmware[cardp->totalbytes],
339                le32_to_cpu(fwdata->fwheader.datalength));
340
341         /*
342         lbs_deb_usbd(&cardp->udev->dev,
343                     "Data length = %d\n", le32_to_cpu(fwdata->fwheader.datalength));
344         */
345
346         cardp->fwseqnum = cardp->fwseqnum + 1;
347
348         fwdata->seqnum = cpu_to_le32(cardp->fwseqnum);
349         cardp->lastseqnum = cardp->fwseqnum;
350         cardp->totalbytes += le32_to_cpu(fwdata->fwheader.datalength);
351
352         if (fwheader->dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
353                 /*
354                 lbs_deb_usbd(&cardp->udev->dev, "There are data to follow\n");
355                 lbs_deb_usbd(&cardp->udev->dev,
356                             "seqnum = %d totalbytes = %d\n", cardp->fwseqnum,
357                             cardp->totalbytes);
358                 */
359                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
360                 usb_tx_block(cardp, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
361
362         } else if (fwdata->fwheader.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
363                 /*
364                 lbs_deb_usbd(&cardp->udev->dev,
365                             "Host has finished FW downloading\n");
366                 lbs_deb_usbd(&cardp->udev->dev,
367                             "Donwloading FW JUMP BLOCK\n");
368                 */
369                 memcpy(cardp->bulk_out_buffer, fwheader, FW_DATA_XMIT_SIZE);
370                 usb_tx_block(cardp, cardp->bulk_out_buffer, FW_DATA_XMIT_SIZE);
371                 cardp->fwfinalblk = 1;
372         }
373
374         /*
375         lbs_deb_usbd(&cardp->udev->dev,
376                     "The firmware download is done size is %d\n",
377                     cardp->totalbytes);
378         */
379
380         kfree(fwdata);
381
382         return 0;
383 }
384
385 static int if_usb_reset_device(struct usb_card_rec *cardp)
386 {
387         int ret;
388         wlan_private * priv = cardp->priv;
389
390         lbs_deb_enter(LBS_DEB_USB);
391
392         /* Try a USB port reset first, if that fails send the reset
393          * command to the firmware.
394          */
395         ret = usb_reset_device(cardp->udev);
396         if (!ret && priv) {
397                 msleep(10);
398                 ret = libertas_reset_device(priv);
399                 msleep(10);
400         }
401
402         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
403
404         return ret;
405 }
406
407 /**
408  *  @brief This function transfer the data to the device.
409  *  @param priv         pointer to wlan_private
410  *  @param payload      pointer to payload data
411  *  @param nb           data length
412  *  @return             0 or -1
413  */
414 static int usb_tx_block(struct usb_card_rec *cardp, u8 * payload, u16 nb)
415 {
416         int ret = -1;
417
418         /* check if device is removed */
419         if (cardp->surprise_removed) {
420                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
421                 goto tx_ret;
422         }
423
424         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
425                           usb_sndbulkpipe(cardp->udev,
426                                           cardp->bulk_out_endpointAddr),
427                           payload, nb, if_usb_write_bulk_callback, cardp);
428
429         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
430
431         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
432                 /*  transfer failed */
433                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed\n");
434                 ret = -1;
435         } else {
436                 /* lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb success\n"); */
437                 ret = 0;
438         }
439
440 tx_ret:
441         return ret;
442 }
443
444 static int __if_usb_submit_rx_urb(struct usb_card_rec *cardp,
445                                   void (*callbackfn)(struct urb *urb))
446 {
447         struct sk_buff *skb;
448         struct read_cb_info *rinfo = &cardp->rinfo;
449         int ret = -1;
450
451         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
452                 lbs_pr_err("No free skb\n");
453                 goto rx_ret;
454         }
455
456         rinfo->skb = skb;
457
458         /* Fill the receive configuration URB and initialise the Rx call back */
459         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
460                           usb_rcvbulkpipe(cardp->udev,
461                                           cardp->bulk_in_endpointAddr),
462                           (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
463                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
464                           rinfo);
465
466         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
467
468         /* lbs_deb_usbd(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb); */
469         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
470                 /* handle failure conditions */
471                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed\n");
472                 ret = -1;
473         } else {
474                 /* lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB success\n"); */
475                 ret = 0;
476         }
477
478 rx_ret:
479         return ret;
480 }
481
482 static int if_usb_submit_rx_urb_fwload(struct usb_card_rec *cardp)
483 {
484         return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
485 }
486
487 static int if_usb_submit_rx_urb(struct usb_card_rec *cardp)
488 {
489         return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
490 }
491
492 static void if_usb_receive_fwload(struct urb *urb)
493 {
494         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
495         struct sk_buff *skb = rinfo->skb;
496         struct usb_card_rec *cardp = (struct usb_card_rec *)rinfo->cardp;
497         struct fwsyncheader *syncfwheader;
498         struct bootcmdrespStr bootcmdresp;
499
500         if (urb->status) {
501                 lbs_deb_usbd(&cardp->udev->dev,
502                             "URB status is failed during fw load\n");
503                 kfree_skb(skb);
504                 return;
505         }
506
507         if (cardp->bootcmdresp == 0) {
508                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
509                         sizeof(bootcmdresp));
510                 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
511                         kfree_skb(skb);
512                         if_usb_submit_rx_urb_fwload(cardp);
513                         cardp->bootcmdresp = 1;
514                         lbs_deb_usbd(&cardp->udev->dev,
515                                     "Received valid boot command response\n");
516                         return;
517                 }
518                 if (bootcmdresp.u32magicnumber != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
519                         lbs_pr_info(
520                                 "boot cmd response wrong magic number (0x%x)\n",
521                                 le32_to_cpu(bootcmdresp.u32magicnumber));
522                 } else if (bootcmdresp.u8cmd_tag != BOOT_CMD_FW_BY_USB) {
523                         lbs_pr_info(
524                                 "boot cmd response cmd_tag error (%d)\n",
525                                 bootcmdresp.u8cmd_tag);
526                 } else if (bootcmdresp.u8result != BOOT_CMD_RESP_OK) {
527                         lbs_pr_info(
528                                 "boot cmd response result error (%d)\n",
529                                 bootcmdresp.u8result);
530                 } else {
531                         cardp->bootcmdresp = 1;
532                         lbs_deb_usbd(&cardp->udev->dev,
533                                     "Received valid boot command response\n");
534                 }
535                 kfree_skb(skb);
536                 if_usb_submit_rx_urb_fwload(cardp);
537                 return;
538         }
539
540         syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
541         if (!syncfwheader) {
542                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
543                 kfree_skb(skb);
544                 return;
545         }
546
547         memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
548                         sizeof(struct fwsyncheader));
549
550         if (!syncfwheader->cmd) {
551                 /*
552                 lbs_deb_usbd(&cardp->udev->dev,
553                             "FW received Blk with correct CRC\n");
554                 lbs_deb_usbd(&cardp->udev->dev,
555                             "FW received Blk seqnum = %d\n",
556                        syncfwheader->seqnum);
557                 */
558                 cardp->CRC_OK = 1;
559         } else {
560                 lbs_deb_usbd(&cardp->udev->dev,
561                             "FW received Blk with CRC error\n");
562                 cardp->CRC_OK = 0;
563         }
564
565         kfree_skb(skb);
566
567         if (cardp->fwfinalblk) {
568                 cardp->fwdnldover = 1;
569                 goto exit;
570         }
571
572         if_prog_firmware(cardp);
573
574         if_usb_submit_rx_urb_fwload(cardp);
575 exit:
576         kfree(syncfwheader);
577
578         return;
579
580 }
581
582 #define MRVDRV_MIN_PKT_LEN      30
583
584 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
585                                        struct usb_card_rec *cardp,
586                                        wlan_private *priv)
587 {
588         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE +
589             MESSAGE_HEADER_LEN || recvlength < MRVDRV_MIN_PKT_LEN) {
590                 lbs_deb_usbd(&cardp->udev->dev,
591                             "Packet length is Invalid\n");
592                 kfree_skb(skb);
593                 return;
594         }
595
596         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
597         skb_put(skb, recvlength);
598         skb_pull(skb, MESSAGE_HEADER_LEN);
599         libertas_process_rxed_packet(priv, skb);
600         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
601 }
602
603 static inline void process_cmdrequest(int recvlength, u8 *recvbuff,
604                                       struct sk_buff *skb,
605                                       struct usb_card_rec *cardp,
606                                       wlan_private *priv)
607 {
608         u8 *cmdbuf;
609         if (recvlength > MRVDRV_SIZE_OF_CMD_BUFFER) {
610                 lbs_deb_usbd(&cardp->udev->dev,
611                             "The receive buffer is too large\n");
612                 kfree_skb(skb);
613                 return;
614         }
615
616         if (!in_interrupt())
617                 BUG();
618
619         spin_lock(&priv->adapter->driver_lock);
620         /* take care of cur_cmd = NULL case by reading the
621          * data to clear the interrupt */
622         if (!priv->adapter->cur_cmd) {
623                 cmdbuf = priv->upld_buf;
624                 priv->adapter->hisregcpy &= ~MRVDRV_CMD_UPLD_RDY;
625         } else
626                 cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
627
628         cardp->usb_int_cause |= MRVDRV_CMD_UPLD_RDY;
629         priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
630         memcpy(cmdbuf, recvbuff + MESSAGE_HEADER_LEN,
631                priv->upld_len);
632
633         kfree_skb(skb);
634         libertas_interrupt(priv->dev);
635         spin_unlock(&priv->adapter->driver_lock);
636
637         lbs_deb_usbd(&cardp->udev->dev,
638                     "Wake up main thread to handle cmd response\n");
639
640         return;
641 }
642
643 /**
644  *  @brief This function reads of the packet into the upload buff,
645  *  wake up the main thread and initialise the Rx callack.
646  *
647  *  @param urb          pointer to struct urb
648  *  @return             N/A
649  */
650 static void if_usb_receive(struct urb *urb)
651 {
652         struct read_cb_info *rinfo = (struct read_cb_info *)urb->context;
653         struct sk_buff *skb = rinfo->skb;
654         struct usb_card_rec *cardp = (struct usb_card_rec *) rinfo->cardp;
655         wlan_private * priv = cardp->priv;
656
657         int recvlength = urb->actual_length;
658         u8 *recvbuff = NULL;
659         u32 recvtype = 0;
660
661         lbs_deb_enter(LBS_DEB_USB);
662
663         if (recvlength) {
664                 __le32 tmp;
665
666                 if (urb->status) {
667                         lbs_deb_usbd(&cardp->udev->dev,
668                                     "URB status is failed\n");
669                         kfree_skb(skb);
670                         goto setup_for_next;
671                 }
672
673                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
674                 memcpy(&tmp, recvbuff, sizeof(u32));
675                 recvtype = le32_to_cpu(tmp);
676                 lbs_deb_usbd(&cardp->udev->dev,
677                             "Recv length = 0x%x, Recv type = 0x%X\n",
678                             recvlength, recvtype);
679         } else if (urb->status)
680                 goto rx_exit;
681
682         switch (recvtype) {
683         case CMD_TYPE_DATA:
684                 process_cmdtypedata(recvlength, skb, cardp, priv);
685                 break;
686
687         case CMD_TYPE_REQUEST:
688                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
689                 break;
690
691         case CMD_TYPE_INDICATION:
692                 /* Event cause handling */
693                 spin_lock(&priv->adapter->driver_lock);
694                 cardp->usb_event_cause = le32_to_cpu(*(__le32 *) (recvbuff + MESSAGE_HEADER_LEN));
695                 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
696                             cardp->usb_event_cause);
697                 if (cardp->usb_event_cause & 0xffff0000) {
698                         libertas_send_tx_feedback(priv);
699                         spin_unlock(&priv->adapter->driver_lock);
700                         break;
701                 }
702                 cardp->usb_event_cause <<= 3;
703                 cardp->usb_int_cause |= MRVDRV_CARDEVENT;
704                 kfree_skb(skb);
705                 libertas_interrupt(priv->dev);
706                 spin_unlock(&priv->adapter->driver_lock);
707                 goto rx_exit;
708         default:
709                 lbs_deb_usbd(&cardp->udev->dev, "Unknown command type 0x%X\n",
710                              recvtype);
711                 kfree_skb(skb);
712                 break;
713         }
714
715 setup_for_next:
716         if_usb_submit_rx_urb(cardp);
717 rx_exit:
718         lbs_deb_leave(LBS_DEB_USB);
719 }
720
721 /**
722  *  @brief This function downloads data to FW
723  *  @param priv         pointer to wlan_private structure
724  *  @param type         type of data
725  *  @param buf          pointer to data buffer
726  *  @param len          number of bytes
727  *  @return             0 or -1
728  */
729 static int if_usb_host_to_card(wlan_private * priv, u8 type, u8 * payload, u16 nb)
730 {
731         struct usb_card_rec *cardp = (struct usb_card_rec *)priv->card;
732
733         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
734         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
735
736         if (type == MVMS_CMD) {
737                 __le32 tmp = cpu_to_le32(CMD_TYPE_REQUEST);
738                 priv->dnld_sent = DNLD_CMD_SENT;
739                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
740                        MESSAGE_HEADER_LEN);
741
742         } else {
743                 __le32 tmp = cpu_to_le32(CMD_TYPE_DATA);
744                 priv->dnld_sent = DNLD_DATA_SENT;
745                 memcpy(cardp->bulk_out_buffer, (u8 *) & tmp,
746                        MESSAGE_HEADER_LEN);
747         }
748
749         memcpy((cardp->bulk_out_buffer + MESSAGE_HEADER_LEN), payload, nb);
750
751         return usb_tx_block(cardp, cardp->bulk_out_buffer,
752                             nb + MESSAGE_HEADER_LEN);
753 }
754
755 /* called with adapter->driver_lock held */
756 static int if_usb_get_int_status(wlan_private * priv, u8 * ireg)
757 {
758         struct usb_card_rec *cardp = priv->card;
759
760         *ireg = cardp->usb_int_cause;
761         cardp->usb_int_cause = 0;
762
763         lbs_deb_usbd(&cardp->udev->dev,"Int cause is 0x%X\n", *ireg);
764
765         return 0;
766 }
767
768 static int if_usb_read_event_cause(wlan_private * priv)
769 {
770         struct usb_card_rec *cardp = priv->card;
771
772         priv->adapter->eventcause = cardp->usb_event_cause;
773         /* Re-submit rx urb here to avoid event lost issue */
774         if_usb_submit_rx_urb(cardp);
775         return 0;
776 }
777
778 /**
779  *  @brief This function issues Boot command to the Boot2 code
780  *  @param ivalue   1:Boot from FW by USB-Download
781  *                  2:Boot from FW in EEPROM
782  *  @return             0
783  */
784 static int if_usb_issue_boot_command(struct usb_card_rec *cardp, int ivalue)
785 {
786         struct bootcmdstr sbootcmd;
787         int i;
788
789         /* Prepare command */
790         sbootcmd.u32magicnumber = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
791         sbootcmd.u8cmd_tag = ivalue;
792         for (i=0; i<11; i++)
793                 sbootcmd.au8dumy[i]=0x00;
794         memcpy(cardp->bulk_out_buffer, &sbootcmd, sizeof(struct bootcmdstr));
795
796         /* Issue command */
797         usb_tx_block(cardp, cardp->bulk_out_buffer, sizeof(struct bootcmdstr));
798
799         return 0;
800 }
801
802
803 /**
804  *  @brief This function checks the validity of Boot2/FW image.
805  *
806  *  @param data              pointer to image
807  *         len               image length
808  *  @return     0 or -1
809  */
810 static int check_fwfile_format(u8 *data, u32 totlen)
811 {
812         u32 bincmd, exit;
813         u32 blksize, offset, len;
814         int ret;
815
816         ret = 1;
817         exit = len = 0;
818
819         do {
820                 struct fwheader *fwh = (void *)data;
821
822                 bincmd = le32_to_cpu(fwh->dnldcmd);
823                 blksize = le32_to_cpu(fwh->datalength);
824                 switch (bincmd) {
825                 case FW_HAS_DATA_TO_RECV:
826                         offset = sizeof(struct fwheader) + blksize;
827                         data += offset;
828                         len += offset;
829                         if (len >= totlen)
830                                 exit = 1;
831                         break;
832                 case FW_HAS_LAST_BLOCK:
833                         exit = 1;
834                         ret = 0;
835                         break;
836                 default:
837                         exit = 1;
838                         break;
839                 }
840         } while (!exit);
841
842         if (ret)
843                 lbs_pr_err("firmware file format check FAIL\n");
844         else
845                 lbs_deb_fw("firmware file format check PASS\n");
846
847         return ret;
848 }
849
850
851 static int if_usb_prog_firmware(struct usb_card_rec *cardp)
852 {
853         int i = 0;
854         static int reset_count = 10;
855         int ret = 0;
856
857         lbs_deb_enter(LBS_DEB_USB);
858
859         if ((ret = request_firmware(&cardp->fw, libertas_fw_name,
860                                     &cardp->udev->dev)) < 0) {
861                 lbs_pr_err("request_firmware() failed with %#x\n", ret);
862                 lbs_pr_err("firmware %s not found\n", libertas_fw_name);
863                 goto done;
864         }
865
866         if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
867                 goto release_fw;
868
869 restart:
870         if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
871                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
872                 ret = -1;
873                 goto release_fw;
874         }
875
876         cardp->bootcmdresp = 0;
877         do {
878                 int j = 0;
879                 i++;
880                 /* Issue Boot command = 1, Boot from Download-FW */
881                 if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
882                 /* wait for command response */
883                 do {
884                         j++;
885                         msleep_interruptible(100);
886                 } while (cardp->bootcmdresp == 0 && j < 10);
887         } while (cardp->bootcmdresp == 0 && i < 5);
888
889         if (cardp->bootcmdresp == 0) {
890                 if (--reset_count >= 0) {
891                         if_usb_reset_device(cardp);
892                         goto restart;
893                 }
894                 return -1;
895         }
896
897         i = 0;
898
899         cardp->totalbytes = 0;
900         cardp->fwlastblksent = 0;
901         cardp->CRC_OK = 1;
902         cardp->fwdnldover = 0;
903         cardp->fwseqnum = -1;
904         cardp->totalbytes = 0;
905         cardp->fwfinalblk = 0;
906
907         if_prog_firmware(cardp);
908
909         do {
910                 lbs_deb_usbd(&cardp->udev->dev,"Wlan sched timeout\n");
911                 i++;
912                 msleep_interruptible(100);
913                 if (cardp->surprise_removed || i >= 20)
914                         break;
915         } while (!cardp->fwdnldover);
916
917         if (!cardp->fwdnldover) {
918                 lbs_pr_info("failed to load fw, resetting device!\n");
919                 if (--reset_count >= 0) {
920                         if_usb_reset_device(cardp);
921                         goto restart;
922                 }
923
924                 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
925                 ret = -1;
926                 goto release_fw;
927         }
928
929 release_fw:
930         release_firmware(cardp->fw);
931         cardp->fw = NULL;
932
933 done:
934         lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
935         return ret;
936 }
937
938
939 #ifdef CONFIG_PM
940 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
941 {
942         struct usb_card_rec *cardp = usb_get_intfdata(intf);
943         wlan_private *priv = cardp->priv;
944
945         lbs_deb_enter(LBS_DEB_USB);
946
947         if (priv->adapter->psstate != PS_STATE_FULL_POWER)
948                 return -1;
949
950         if (priv->mesh_dev && !priv->mesh_autostart_enabled) {
951                 /* Mesh autostart must be activated while sleeping
952                  * On resume it will go back to the current state
953                  */
954                 struct cmd_ds_mesh_access mesh_access;
955                 memset(&mesh_access, 0, sizeof(mesh_access));
956                 mesh_access.data[0] = cpu_to_le32(1);
957                 libertas_prepare_and_send_command(priv,
958                                 CMD_MESH_ACCESS,
959                                 CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
960                                 CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
961         }
962
963         netif_device_detach(cardp->eth_dev);
964         netif_device_detach(priv->mesh_dev);
965
966         /* Unlink tx & rx urb */
967         usb_kill_urb(cardp->tx_urb);
968         usb_kill_urb(cardp->rx_urb);
969
970         cardp->rx_urb_recall = 1;
971
972         lbs_deb_leave(LBS_DEB_USB);
973         return 0;
974 }
975
976 static int if_usb_resume(struct usb_interface *intf)
977 {
978         struct usb_card_rec *cardp = usb_get_intfdata(intf);
979         wlan_private *priv = cardp->priv;
980
981         lbs_deb_enter(LBS_DEB_USB);
982
983         cardp->rx_urb_recall = 0;
984
985         if_usb_submit_rx_urb(cardp->priv);
986
987         netif_device_attach(cardp->eth_dev);
988         netif_device_attach(priv->mesh_dev);
989
990         if (priv->mesh_dev && !priv->mesh_autostart_enabled) {
991                 /* Mesh autostart was activated while sleeping
992                  * Disable it if appropriate
993                  */
994                 struct cmd_ds_mesh_access mesh_access;
995                 memset(&mesh_access, 0, sizeof(mesh_access));
996                 mesh_access.data[0] = cpu_to_le32(0);
997                 libertas_prepare_and_send_command(priv,
998                                 CMD_MESH_ACCESS,
999                                 CMD_ACT_MESH_SET_AUTOSTART_ENABLED,
1000                                 CMD_OPTION_WAITFORRSP, 0, (void *)&mesh_access);
1001         }
1002
1003         lbs_deb_leave(LBS_DEB_USB);
1004         return 0;
1005 }
1006 #else
1007 #define if_usb_suspend NULL
1008 #define if_usb_resume NULL
1009 #endif
1010
1011 static struct usb_driver if_usb_driver = {
1012         /* driver name */
1013         .name = usbdriver_name,
1014         /* probe function name */
1015         .probe = if_usb_probe,
1016         /* disconnect function  name */
1017         .disconnect = if_usb_disconnect,
1018         /* device signature table */
1019         .id_table = if_usb_table,
1020         .suspend = if_usb_suspend,
1021         .resume = if_usb_resume,
1022 };
1023
1024 static int if_usb_init_module(void)
1025 {
1026         int ret = 0;
1027
1028         lbs_deb_enter(LBS_DEB_MAIN);
1029
1030         if (libertas_fw_name == NULL) {
1031                 libertas_fw_name = default_fw_name;
1032         }
1033
1034         ret = usb_register(&if_usb_driver);
1035
1036         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1037         return ret;
1038 }
1039
1040 static void if_usb_exit_module(void)
1041 {
1042         struct usb_card_rec *cardp, *cardp_temp;
1043
1044         lbs_deb_enter(LBS_DEB_MAIN);
1045
1046         list_for_each_entry_safe(cardp, cardp_temp, &usb_devices, list) {
1047                 libertas_prepare_and_send_command(cardp->priv, CMD_802_11_RESET,
1048                                                   CMD_ACT_HALT, 0, 0, NULL);
1049         }
1050
1051         /* API unregisters the driver from USB subsystem */
1052         usb_deregister(&if_usb_driver);
1053
1054         lbs_deb_leave(LBS_DEB_MAIN);
1055 }
1056
1057 module_init(if_usb_init_module);
1058 module_exit(if_usb_exit_module);
1059
1060 MODULE_DESCRIPTION("8388 USB WLAN Driver");
1061 MODULE_AUTHOR("Marvell International Ltd.");
1062 MODULE_LICENSE("GPL");