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[openwrt.git] / package / libertas / src / 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/usb.h>
9
10 #define DRV_NAME "usb8xxx"
11
12 #include "host.h"
13 #include "decl.h"
14 #include "defs.h"
15 #include "dev.h"
16 #include "cmd.h"
17 #include "if_usb.h"
18
19 #define INSANEDEBUG 0
20 #define lbs_deb_usb2(...) do { if (INSANEDEBUG) lbs_deb_usbd(__VA_ARGS__); } while (0)
21
22 #define MESSAGE_HEADER_LEN 4
23
24 static char *lbs_fw_name = "usb8388.bin";
25 module_param_named(fw_name, lbs_fw_name, charp, 0644);
26
27 static struct usb_device_id if_usb_table[] = {
28 /* Enter the device signature inside */
29 { USB_DEVICE(0x1286, 0x2001) },
30 { USB_DEVICE(0x05a3, 0x8388) },
31 {} /* Terminating entry */
32 };
33
34 MODULE_DEVICE_TABLE(usb, if_usb_table);
35
36 static void if_usb_receive(struct urb *urb);
37 static void if_usb_receive_fwload(struct urb *urb);
38 static int if_usb_prog_firmware(struct if_usb_card *cardp);
39 static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
40 uint8_t *payload, uint16_t nb);
41 static int if_usb_get_int_status(struct lbs_private *priv, uint8_t *);
42 static int if_usb_read_event_cause(struct lbs_private *);
43 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
44 uint16_t nb);
45 static void if_usb_free(struct if_usb_card *cardp);
46 static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
47 static int if_usb_reset_device(struct if_usb_card *cardp);
48
49 /**
50 * @brief call back function to handle the status of the URB
51 * @param urb pointer to urb structure
52 * @return N/A
53 */
54 static void if_usb_write_bulk_callback(struct urb *urb)
55 {
56 struct if_usb_card *cardp = (struct if_usb_card *) urb->context;
57
58 /* handle the transmission complete validations */
59
60 if (urb->status == 0) {
61 struct lbs_private *priv = cardp->priv;
62
63 lbs_deb_usb2(&urb->dev->dev, "URB status is successful\n");
64 lbs_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
65 urb->actual_length);
66
67 /* Used for both firmware TX and regular TX. priv isn't
68 * valid at firmware load time.
69 */
70 if (priv)
71 lbs_host_to_card_done(priv);
72 } else {
73 /* print the failure status number for debug */
74 lbs_pr_info("URB in failure status: %d\n", urb->status);
75 }
76
77 return;
78 }
79
80 /**
81 * @brief free tx/rx urb, skb and rx buffer
82 * @param cardp pointer if_usb_card
83 * @return N/A
84 */
85 static void if_usb_free(struct if_usb_card *cardp)
86 {
87 lbs_deb_enter(LBS_DEB_USB);
88
89 /* Unlink tx & rx urb */
90 usb_kill_urb(cardp->tx_urb);
91 usb_kill_urb(cardp->rx_urb);
92
93 usb_free_urb(cardp->tx_urb);
94 cardp->tx_urb = NULL;
95
96 usb_free_urb(cardp->rx_urb);
97 cardp->rx_urb = NULL;
98
99 kfree(cardp->ep_out_buf);
100 cardp->ep_out_buf = NULL;
101
102 lbs_deb_leave(LBS_DEB_USB);
103 }
104
105 static void if_usb_setup_firmware(struct lbs_private *priv)
106 {
107 struct cmd_ds_set_boot2_ver b2_cmd;
108 struct cmd_ds_802_11_fw_wake_method wake_method;
109
110 b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
111 b2_cmd.action = 0;
112 b2_cmd.version = priv->boot2_version;
113
114 if (lbs_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
115 lbs_deb_usb("Setting boot2 version failed\n");
116
117 priv->wol_gpio = 2; /* Wake via GPIO2... */
118 priv->wol_gap = 20; /* ... after 20ms */
119 lbs_host_sleep_cfg(priv, EHS_WAKE_ON_UNICAST_DATA);
120
121 wake_method.hdr.size = cpu_to_le16(sizeof(wake_method));
122 wake_method.action = cpu_to_le16(CMD_ACT_GET);
123 if (lbs_cmd_with_response(priv, CMD_802_11_FW_WAKE_METHOD, &wake_method)) {
124 lbs_pr_info("Firmware does not seem to support PS mode\n");
125 } else {
126 if (le16_to_cpu(wake_method.method) == CMD_WAKE_METHOD_COMMAND_INT) {
127 lbs_deb_usb("Firmware seems to support PS with wake-via-command\n");
128 priv->ps_supported = 1;
129 } else {
130 /* The versions which boot up this way don't seem to
131 work even if we set it to the command interrupt */
132 lbs_pr_info("Firmware doesn't wake via command interrupt; disabling PS mode\n");
133 }
134 }
135 }
136
137 static void if_usb_fw_timeo(unsigned long priv)
138 {
139 struct if_usb_card *cardp = (void *)priv;
140
141 if (cardp->fwdnldover) {
142 lbs_deb_usb("Download complete, no event. Assuming success\n");
143 } else {
144 lbs_pr_err("Download timed out\n");
145 cardp->surprise_removed = 1;
146 }
147 wake_up(&cardp->fw_wq);
148 }
149
150 /**
151 * @brief sets the configuration values
152 * @param ifnum interface number
153 * @param id pointer to usb_device_id
154 * @return 0 on success, error code on failure
155 */
156 static int if_usb_probe(struct usb_interface *intf,
157 const struct usb_device_id *id)
158 {
159 struct usb_device *udev;
160 struct usb_host_interface *iface_desc;
161 struct usb_endpoint_descriptor *endpoint;
162 struct lbs_private *priv;
163 struct if_usb_card *cardp;
164 int i;
165
166 udev = interface_to_usbdev(intf);
167
168 cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
169 if (!cardp) {
170 lbs_pr_err("Out of memory allocating private data.\n");
171 goto error;
172 }
173
174 setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
175 init_waitqueue_head(&cardp->fw_wq);
176
177 cardp->udev = udev;
178 iface_desc = intf->cur_altsetting;
179
180 lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
181 " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
182 le16_to_cpu(udev->descriptor.bcdUSB),
183 udev->descriptor.bDeviceClass,
184 udev->descriptor.bDeviceSubClass,
185 udev->descriptor.bDeviceProtocol);
186
187 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
188 endpoint = &iface_desc->endpoint[i].desc;
189 if (usb_endpoint_is_bulk_in(endpoint)) {
190 cardp->ep_in_size = le16_to_cpu(endpoint->wMaxPacketSize);
191 cardp->ep_in = usb_endpoint_num(endpoint);
192
193 lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
194 lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);
195
196 } else if (usb_endpoint_is_bulk_out(endpoint)) {
197 cardp->ep_out_size = le16_to_cpu(endpoint->wMaxPacketSize);
198 cardp->ep_out = usb_endpoint_num(endpoint);
199
200 lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
201 lbs_deb_usbd(&udev->dev, "Bulk out size is %d\n", cardp->ep_out_size);
202 }
203 }
204 if (!cardp->ep_out_size || !cardp->ep_in_size) {
205 lbs_deb_usbd(&udev->dev, "Endpoints not found\n");
206 goto dealloc;
207 }
208 if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
209 lbs_deb_usbd(&udev->dev, "Rx URB allocation failed\n");
210 goto dealloc;
211 }
212 if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
213 lbs_deb_usbd(&udev->dev, "Tx URB allocation failed\n");
214 goto dealloc;
215 }
216 cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE, GFP_KERNEL);
217 if (!cardp->ep_out_buf) {
218 lbs_deb_usbd(&udev->dev, "Could not allocate buffer\n");
219 goto dealloc;
220 }
221
222 /* Upload firmware */
223 if (if_usb_prog_firmware(cardp)) {
224 lbs_deb_usbd(&udev->dev, "FW upload failed\n");
225 goto err_prog_firmware;
226 }
227
228 if (!(priv = lbs_add_card(cardp, &udev->dev)))
229 goto err_prog_firmware;
230
231 cardp->priv = priv;
232 cardp->priv->fw_ready = 1;
233
234 priv->hw_host_to_card = if_usb_host_to_card;
235 priv->hw_get_int_status = if_usb_get_int_status;
236 priv->hw_read_event_cause = if_usb_read_event_cause;
237 priv->boot2_version = udev->descriptor.bcdDevice;
238
239 if_usb_submit_rx_urb(cardp);
240
241 if (lbs_start_card(priv))
242 goto err_start_card;
243
244 if_usb_setup_firmware(priv);
245
246 usb_get_dev(udev);
247 usb_set_intfdata(intf, cardp);
248
249 return 0;
250
251 err_start_card:
252 lbs_remove_card(priv);
253 err_prog_firmware:
254 if_usb_reset_device(cardp);
255 dealloc:
256 if_usb_free(cardp);
257
258 error:
259 return -ENOMEM;
260 }
261
262 /**
263 * @brief free resource and cleanup
264 * @param intf USB interface structure
265 * @return N/A
266 */
267 static void if_usb_disconnect(struct usb_interface *intf)
268 {
269 struct if_usb_card *cardp = usb_get_intfdata(intf);
270 struct lbs_private *priv = (struct lbs_private *) cardp->priv;
271
272 lbs_deb_enter(LBS_DEB_MAIN);
273
274 cardp->surprise_removed = 1;
275
276 if (priv) {
277 priv->surpriseremoved = 1;
278 lbs_stop_card(priv);
279 lbs_remove_card(priv);
280 }
281
282 /* Unlink and free urb */
283 if_usb_free(cardp);
284
285 usb_set_intfdata(intf, NULL);
286 usb_put_dev(interface_to_usbdev(intf));
287
288 lbs_deb_leave(LBS_DEB_MAIN);
289 }
290
291 /**
292 * @brief This function download FW
293 * @param priv pointer to struct lbs_private
294 * @return 0
295 */
296 static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
297 {
298 struct fwdata *fwdata = cardp->ep_out_buf;
299 uint8_t *firmware = cardp->fw->data;
300
301 /* If we got a CRC failure on the last block, back
302 up and retry it */
303 if (!cardp->CRC_OK) {
304 cardp->totalbytes = cardp->fwlastblksent;
305 cardp->fwseqnum--;
306 }
307
308 lbs_deb_usb2(&cardp->udev->dev, "totalbytes = %d\n",
309 cardp->totalbytes);
310
311 /* struct fwdata (which we sent to the card) has an
312 extra __le32 field in between the header and the data,
313 which is not in the struct fwheader in the actual
314 firmware binary. Insert the seqnum in the middle... */
315 memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
316 sizeof(struct fwheader));
317
318 cardp->fwlastblksent = cardp->totalbytes;
319 cardp->totalbytes += sizeof(struct fwheader);
320
321 memcpy(fwdata->data, &firmware[cardp->totalbytes],
322 le32_to_cpu(fwdata->hdr.datalength));
323
324 lbs_deb_usb2(&cardp->udev->dev, "Data length = %d\n",
325 le32_to_cpu(fwdata->hdr.datalength));
326
327 fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
328 cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
329
330 usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
331 le32_to_cpu(fwdata->hdr.datalength));
332
333 if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
334 lbs_deb_usb2(&cardp->udev->dev, "There are data to follow\n");
335 lbs_deb_usb2(&cardp->udev->dev, "seqnum = %d totalbytes = %d\n",
336 cardp->fwseqnum, cardp->totalbytes);
337 } else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
338 lbs_deb_usb2(&cardp->udev->dev, "Host has finished FW downloading\n");
339 lbs_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");
340
341 cardp->fwfinalblk = 1;
342 }
343
344 lbs_deb_usb2(&cardp->udev->dev, "Firmware download done; size %d\n",
345 cardp->totalbytes);
346
347 return 0;
348 }
349
350 static int if_usb_reset_device(struct if_usb_card *cardp)
351 {
352 struct cmd_ds_command *cmd = cardp->ep_out_buf + 4;
353 int ret;
354
355 lbs_deb_enter(LBS_DEB_USB);
356
357 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
358
359 cmd->command = cpu_to_le16(CMD_802_11_RESET);
360 cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset) + S_DS_GEN);
361 cmd->result = cpu_to_le16(0);
362 cmd->seqnum = cpu_to_le16(0x5a5a);
363 cmd->params.reset.action = cpu_to_le16(CMD_ACT_HALT);
364 usb_tx_block(cardp, cardp->ep_out_buf, 4 + S_DS_GEN + sizeof(struct cmd_ds_802_11_reset));
365
366 msleep(100);
367 ret = usb_reset_device(cardp->udev);
368 msleep(100);
369
370 lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
371
372 return ret;
373 }
374
375 /**
376 * @brief This function transfer the data to the device.
377 * @param priv pointer to struct lbs_private
378 * @param payload pointer to payload data
379 * @param nb data length
380 * @return 0 or -1
381 */
382 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload, uint16_t nb)
383 {
384 int ret = -1;
385
386 /* check if device is removed */
387 if (cardp->surprise_removed) {
388 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
389 goto tx_ret;
390 }
391
392 usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
393 usb_sndbulkpipe(cardp->udev,
394 cardp->ep_out),
395 payload, nb, if_usb_write_bulk_callback, cardp);
396
397 cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
398
399 if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
400 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed: %d\n", ret);
401 ret = -1;
402 } else {
403 lbs_deb_usb2(&cardp->udev->dev, "usb_submit_urb success\n");
404 ret = 0;
405 }
406
407 tx_ret:
408 return ret;
409 }
410
411 static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
412 void (*callbackfn)(struct urb *urb))
413 {
414 struct sk_buff *skb;
415 int ret = -1;
416
417 if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
418 lbs_pr_err("No free skb\n");
419 goto rx_ret;
420 }
421
422 cardp->rx_skb = skb;
423
424 /* Fill the receive configuration URB and initialise the Rx call back */
425 usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
426 usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
427 (void *) (skb->tail + (size_t) IPFIELD_ALIGN_OFFSET),
428 MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
429 cardp);
430
431 cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
432
433 lbs_deb_usb2(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb);
434 if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
435 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed: %d\n", ret);
436 kfree_skb(skb);
437 cardp->rx_skb = NULL;
438 ret = -1;
439 } else {
440 lbs_deb_usb2(&cardp->udev->dev, "Submit Rx URB success\n");
441 ret = 0;
442 }
443
444 rx_ret:
445 return ret;
446 }
447
448 static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
449 {
450 return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
451 }
452
453 static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
454 {
455 return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
456 }
457
458 static void if_usb_receive_fwload(struct urb *urb)
459 {
460 struct if_usb_card *cardp = urb->context;
461 struct sk_buff *skb = cardp->rx_skb;
462 struct fwsyncheader *syncfwheader;
463 struct bootcmdresp bootcmdresp;
464
465 if (urb->status) {
466 lbs_deb_usbd(&cardp->udev->dev,
467 "URB status is failed during fw load\n");
468 kfree_skb(skb);
469 return;
470 }
471
472 if (cardp->fwdnldover) {
473 __le32 *tmp = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
474
475 if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
476 tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY)) {
477 lbs_pr_info("Firmware ready event received\n");
478 wake_up(&cardp->fw_wq);
479 } else {
480 lbs_deb_usb("Waiting for confirmation; got %x %x\n",
481 le32_to_cpu(tmp[0]), le32_to_cpu(tmp[1]));
482 if_usb_submit_rx_urb_fwload(cardp);
483 }
484 kfree_skb(skb);
485 return;
486 }
487 if (cardp->bootcmdresp <= 0) {
488 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
489 sizeof(bootcmdresp));
490
491 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
492 kfree_skb(skb);
493 if_usb_submit_rx_urb_fwload(cardp);
494 cardp->bootcmdresp = 1;
495 lbs_deb_usbd(&cardp->udev->dev,
496 "Received valid boot command response\n");
497 return;
498 }
499 if (bootcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
500 if (bootcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
501 bootcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
502 bootcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION)) {
503 if (!cardp->bootcmdresp)
504 lbs_pr_info("Firmware already seems alive; resetting\n");
505 cardp->bootcmdresp = -1;
506 } else {
507 lbs_pr_info("boot cmd response wrong magic number (0x%x)\n",
508 le32_to_cpu(bootcmdresp.magic));
509 }
510 } else if (bootcmdresp.cmd != BOOT_CMD_FW_BY_USB) {
511 lbs_pr_info("boot cmd response cmd_tag error (%d)\n",
512 bootcmdresp.cmd);
513 } else if (bootcmdresp.result != BOOT_CMD_RESP_OK) {
514 lbs_pr_info("boot cmd response result error (%d)\n",
515 bootcmdresp.result);
516 } else {
517 cardp->bootcmdresp = 1;
518 lbs_deb_usbd(&cardp->udev->dev,
519 "Received valid boot command response\n");
520 }
521 kfree_skb(skb);
522 if_usb_submit_rx_urb_fwload(cardp);
523 return;
524 }
525
526 syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
527 if (!syncfwheader) {
528 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
529 kfree_skb(skb);
530 return;
531 }
532
533 memcpy(syncfwheader, skb->data + IPFIELD_ALIGN_OFFSET,
534 sizeof(struct fwsyncheader));
535
536 if (!syncfwheader->cmd) {
537 lbs_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
538 lbs_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",
539 le32_to_cpu(syncfwheader->seqnum));
540 cardp->CRC_OK = 1;
541 } else {
542 lbs_deb_usbd(&cardp->udev->dev, "FW received Blk with CRC error\n");
543 cardp->CRC_OK = 0;
544 }
545
546 kfree_skb(skb);
547
548 /* reschedule timer for 200ms hence */
549 mod_timer(&cardp->fw_timeout, jiffies + (HZ/5));
550
551 if (cardp->fwfinalblk) {
552 cardp->fwdnldover = 1;
553 goto exit;
554 }
555
556 if_usb_send_fw_pkt(cardp);
557
558 exit:
559 if_usb_submit_rx_urb_fwload(cardp);
560
561 kfree(syncfwheader);
562
563 return;
564 }
565
566 #define MRVDRV_MIN_PKT_LEN 30
567
568 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
569 struct if_usb_card *cardp,
570 struct lbs_private *priv)
571 {
572 if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
573 || recvlength < MRVDRV_MIN_PKT_LEN) {
574 lbs_deb_usbd(&cardp->udev->dev, "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
583 lbs_process_rxed_packet(priv, skb);
584 priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
585 }
586
587 static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
588 struct sk_buff *skb,
589 struct if_usb_card *cardp,
590 struct lbs_private *priv)
591 {
592 if (recvlength > LBS_CMD_BUFFER_SIZE) {
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->driver_lock);
603 cardp->usb_int_cause |= MRVDRV_CMD_UPLD_RDY;
604 priv->upld_len = (recvlength - MESSAGE_HEADER_LEN);
605 memcpy(priv->upld_buf, recvbuff + MESSAGE_HEADER_LEN, priv->upld_len);
606
607 kfree_skb(skb);
608 lbs_interrupt(priv);
609 spin_unlock(&priv->driver_lock);
610
611 lbs_deb_usbd(&cardp->udev->dev,
612 "Wake up main thread to handle cmd response\n");
613 }
614
615 /**
616 * @brief This function reads of the packet into the upload buff,
617 * wake up the main thread and initialise the Rx callack.
618 *
619 * @param urb pointer to struct urb
620 * @return N/A
621 */
622 static void if_usb_receive(struct urb *urb)
623 {
624 struct if_usb_card *cardp = urb->context;
625 struct sk_buff *skb = cardp->rx_skb;
626 struct lbs_private *priv = cardp->priv;
627 int recvlength = urb->actual_length;
628 uint8_t *recvbuff = NULL;
629 uint32_t recvtype = 0;
630 __le32 *pkt = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
631
632 lbs_deb_enter(LBS_DEB_USB);
633
634 if (recvlength) {
635 if (urb->status) {
636 lbs_deb_usbd(&cardp->udev->dev, "RX URB failed: %d\n",
637 urb->status);
638 kfree_skb(skb);
639 goto setup_for_next;
640 }
641
642 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
643 recvtype = le32_to_cpu(pkt[0]);
644 lbs_deb_usbd(&cardp->udev->dev,
645 "Recv length = 0x%x, Recv type = 0x%X\n",
646 recvlength, recvtype);
647 } else if (urb->status) {
648 kfree_skb(skb);
649 goto rx_exit;
650 }
651
652 switch (recvtype) {
653 case CMD_TYPE_DATA:
654 process_cmdtypedata(recvlength, skb, cardp, priv);
655 break;
656
657 case CMD_TYPE_REQUEST:
658 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
659 break;
660
661 case CMD_TYPE_INDICATION:
662 /* Event cause handling */
663 spin_lock(&priv->driver_lock);
664
665 cardp->usb_event_cause = le32_to_cpu(pkt[1]);
666
667 lbs_deb_usbd(&cardp->udev->dev,"**EVENT** 0x%X\n",
668 cardp->usb_event_cause);
669
670 /* Icky undocumented magic special case */
671 if (cardp->usb_event_cause & 0xffff0000) {
672 lbs_send_tx_feedback(priv);
673 spin_unlock(&priv->driver_lock);
674 break;
675 }
676 cardp->usb_event_cause <<= 3;
677 cardp->usb_int_cause |= MRVDRV_CARDEVENT;
678 kfree_skb(skb);
679 lbs_interrupt(priv);
680 spin_unlock(&priv->driver_lock);
681 goto rx_exit;
682 default:
683 lbs_deb_usbd(&cardp->udev->dev, "Unknown command type 0x%X\n",
684 recvtype);
685 kfree_skb(skb);
686 break;
687 }
688
689 setup_for_next:
690 if_usb_submit_rx_urb(cardp);
691 rx_exit:
692 lbs_deb_leave(LBS_DEB_USB);
693 }
694
695 /**
696 * @brief This function downloads data to FW
697 * @param priv pointer to struct lbs_private structure
698 * @param type type of data
699 * @param buf pointer to data buffer
700 * @param len number of bytes
701 * @return 0 or -1
702 */
703 static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
704 uint8_t *payload, uint16_t nb)
705 {
706 struct if_usb_card *cardp = priv->card;
707
708 lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
709 lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
710
711 if (type == MVMS_CMD) {
712 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
713 priv->dnld_sent = DNLD_CMD_SENT;
714 } else {
715 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
716 priv->dnld_sent = DNLD_DATA_SENT;
717 }
718
719 memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
720
721 return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN);
722 }
723
724 /* called with priv->driver_lock held */
725 static int if_usb_get_int_status(struct lbs_private *priv, uint8_t *ireg)
726 {
727 struct if_usb_card *cardp = priv->card;
728
729 *ireg = cardp->usb_int_cause;
730 cardp->usb_int_cause = 0;
731
732 lbs_deb_usbd(&cardp->udev->dev, "Int cause is 0x%X\n", *ireg);
733
734 return 0;
735 }
736
737 static int if_usb_read_event_cause(struct lbs_private *priv)
738 {
739 struct if_usb_card *cardp = priv->card;
740
741 priv->eventcause = cardp->usb_event_cause;
742 /* Re-submit rx urb here to avoid event lost issue */
743 if_usb_submit_rx_urb(cardp);
744
745 return 0;
746 }
747
748 /**
749 * @brief This function issues Boot command to the Boot2 code
750 * @param ivalue 1:Boot from FW by USB-Download
751 * 2:Boot from FW in EEPROM
752 * @return 0
753 */
754 static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
755 {
756 struct bootcmd *bootcmd = cardp->ep_out_buf;
757
758 /* Prepare command */
759 bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
760 bootcmd->cmd = ivalue;
761 memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
762
763 /* Issue command */
764 usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd));
765
766 return 0;
767 }
768
769
770 /**
771 * @brief This function checks the validity of Boot2/FW image.
772 *
773 * @param data pointer to image
774 * len image length
775 * @return 0 or -1
776 */
777 static int check_fwfile_format(uint8_t *data, uint32_t totlen)
778 {
779 uint32_t bincmd, exit;
780 uint32_t blksize, offset, len;
781 int ret;
782
783 ret = 1;
784 exit = len = 0;
785
786 do {
787 struct fwheader *fwh = (void *)data;
788
789 bincmd = le32_to_cpu(fwh->dnldcmd);
790 blksize = le32_to_cpu(fwh->datalength);
791 switch (bincmd) {
792 case FW_HAS_DATA_TO_RECV:
793 offset = sizeof(struct fwheader) + blksize;
794 data += offset;
795 len += offset;
796 if (len >= totlen)
797 exit = 1;
798 break;
799 case FW_HAS_LAST_BLOCK:
800 exit = 1;
801 ret = 0;
802 break;
803 default:
804 exit = 1;
805 break;
806 }
807 } while (!exit);
808
809 if (ret)
810 lbs_pr_err("firmware file format check FAIL\n");
811 else
812 lbs_deb_fw("firmware file format check PASS\n");
813
814 return ret;
815 }
816
817
818 static int if_usb_prog_firmware(struct if_usb_card *cardp)
819 {
820 int i = 0;
821 static int reset_count = 10;
822 int ret = 0;
823
824 lbs_deb_enter(LBS_DEB_USB);
825
826 if ((ret = request_firmware(&cardp->fw, lbs_fw_name,
827 &cardp->udev->dev)) < 0) {
828 lbs_pr_err("request_firmware() failed with %#x\n", ret);
829 lbs_pr_err("firmware %s not found\n", lbs_fw_name);
830 goto done;
831 }
832
833 if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
834 goto release_fw;
835
836 restart:
837 if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
838 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
839 ret = -1;
840 goto release_fw;
841 }
842
843 cardp->bootcmdresp = 0;
844 do {
845 int j = 0;
846 i++;
847 /* Issue Boot command = 1, Boot from Download-FW */
848 if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
849 /* wait for command response */
850 do {
851 j++;
852 msleep_interruptible(100);
853 } while (cardp->bootcmdresp == 0 && j < 10);
854 } while (cardp->bootcmdresp == 0 && i < 5);
855
856 if (cardp->bootcmdresp <= 0) {
857 if (--reset_count >= 0) {
858 if_usb_reset_device(cardp);
859 goto restart;
860 }
861 return -1;
862 }
863
864 i = 0;
865
866 cardp->totalbytes = 0;
867 cardp->fwlastblksent = 0;
868 cardp->CRC_OK = 1;
869 cardp->fwdnldover = 0;
870 cardp->fwseqnum = -1;
871 cardp->totalbytes = 0;
872 cardp->fwfinalblk = 0;
873
874 /* Send the first firmware packet... */
875 if_usb_send_fw_pkt(cardp);
876
877 /* ... and wait for the process to complete */
878 wait_event_interruptible(cardp->fw_wq, cardp->surprise_removed || cardp->fwdnldover);
879
880 del_timer_sync(&cardp->fw_timeout);
881 usb_kill_urb(cardp->rx_urb);
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(cardp);
887 goto restart;
888 }
889
890 lbs_pr_info("FW download failure, time = %d ms\n", i * 100);
891 ret = -1;
892 goto release_fw;
893 }
894
895 release_fw:
896 release_firmware(cardp->fw);
897 cardp->fw = NULL;
898
899 done:
900 lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
901 return ret;
902 }
903
904
905 #ifdef CONFIG_PM
906 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
907 {
908 struct if_usb_card *cardp = usb_get_intfdata(intf);
909 struct lbs_private *priv = cardp->priv;
910 int ret;
911
912 lbs_deb_enter(LBS_DEB_USB);
913
914 if (priv->psstate != PS_STATE_FULL_POWER)
915 return -1;
916
917 ret = lbs_suspend(priv);
918 if (ret)
919 goto out;
920
921 /* Unlink tx & rx urb */
922 usb_kill_urb(cardp->tx_urb);
923 usb_kill_urb(cardp->rx_urb);
924
925 out:
926 lbs_deb_leave(LBS_DEB_USB);
927 return ret;
928 }
929
930 static int if_usb_resume(struct usb_interface *intf)
931 {
932 struct if_usb_card *cardp = usb_get_intfdata(intf);
933 struct lbs_private *priv = cardp->priv;
934
935 lbs_deb_enter(LBS_DEB_USB);
936
937 if_usb_submit_rx_urb(cardp);
938
939 lbs_resume(priv);
940
941 lbs_deb_leave(LBS_DEB_USB);
942 return 0;
943 }
944 #else
945 #define if_usb_suspend NULL
946 #define if_usb_resume NULL
947 #endif
948
949 static struct usb_driver if_usb_driver = {
950 .name = DRV_NAME,
951 .probe = if_usb_probe,
952 .disconnect = if_usb_disconnect,
953 .id_table = if_usb_table,
954 .suspend = if_usb_suspend,
955 .resume = if_usb_resume,
956 };
957
958 static int __init if_usb_init_module(void)
959 {
960 int ret = 0;
961
962 lbs_deb_enter(LBS_DEB_MAIN);
963
964 ret = usb_register(&if_usb_driver);
965
966 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
967 return ret;
968 }
969
970 static void __exit if_usb_exit_module(void)
971 {
972 lbs_deb_enter(LBS_DEB_MAIN);
973
974 usb_deregister(&if_usb_driver);
975
976 lbs_deb_leave(LBS_DEB_MAIN);
977 }
978
979 module_init(if_usb_init_module);
980 module_exit(if_usb_exit_module);
981
982 MODULE_DESCRIPTION("8388 USB WLAN Driver");
983 MODULE_AUTHOR("Marvell International Ltd. and Red Hat, Inc.");
984 MODULE_LICENSE("GPL");
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