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drivers/net: Remove unnecessary returns from void function()s
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / libertas_tf / if_usb.c
1 /*
2 * Copyright (C) 2008, cozybit Inc.
3 * Copyright (C) 2003-2006, Marvell International Ltd.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
9 */
10 #define DRV_NAME "lbtf_usb"
11
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
14 #include "libertas_tf.h"
15 #include "if_usb.h"
16
17 #include <linux/delay.h>
18 #include <linux/moduleparam.h>
19 #include <linux/firmware.h>
20 #include <linux/netdevice.h>
21 #include <linux/slab.h>
22 #include <linux/usb.h>
23
24 #define INSANEDEBUG 0
25 #define lbtf_deb_usb2(...) do { if (INSANEDEBUG) lbtf_deb_usbd(__VA_ARGS__); } while (0)
26
27 #define MESSAGE_HEADER_LEN 4
28
29 static char *lbtf_fw_name = "lbtf_usb.bin";
30 module_param_named(fw_name, lbtf_fw_name, charp, 0644);
31
32 MODULE_FIRMWARE("lbtf_usb.bin");
33
34 static struct usb_device_id if_usb_table[] = {
35 /* Enter the device signature inside */
36 { USB_DEVICE(0x1286, 0x2001) },
37 { USB_DEVICE(0x05a3, 0x8388) },
38 {} /* Terminating entry */
39 };
40
41 MODULE_DEVICE_TABLE(usb, if_usb_table);
42
43 static void if_usb_receive(struct urb *urb);
44 static void if_usb_receive_fwload(struct urb *urb);
45 static int if_usb_prog_firmware(struct if_usb_card *cardp);
46 static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
47 uint8_t *payload, uint16_t nb);
48 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
49 uint16_t nb, u8 data);
50 static void if_usb_free(struct if_usb_card *cardp);
51 static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
52 static int if_usb_reset_device(struct if_usb_card *cardp);
53
54 /**
55 * if_usb_wrike_bulk_callback - call back to handle URB status
56 *
57 * @param urb pointer to urb structure
58 */
59 static void if_usb_write_bulk_callback(struct urb *urb)
60 {
61 if (urb->status != 0) {
62 /* print the failure status number for debug */
63 pr_info("URB in failure status: %d\n", urb->status);
64 } else {
65 lbtf_deb_usb2(&urb->dev->dev, "URB status is successful\n");
66 lbtf_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
67 urb->actual_length);
68 }
69 }
70
71 /**
72 * if_usb_free - free tx/rx urb, skb and rx buffer
73 *
74 * @param cardp pointer if_usb_card
75 */
76 static void if_usb_free(struct if_usb_card *cardp)
77 {
78 lbtf_deb_enter(LBTF_DEB_USB);
79
80 /* Unlink tx & rx urb */
81 usb_kill_urb(cardp->tx_urb);
82 usb_kill_urb(cardp->rx_urb);
83 usb_kill_urb(cardp->cmd_urb);
84
85 usb_free_urb(cardp->tx_urb);
86 cardp->tx_urb = NULL;
87
88 usb_free_urb(cardp->rx_urb);
89 cardp->rx_urb = NULL;
90
91 usb_free_urb(cardp->cmd_urb);
92 cardp->cmd_urb = NULL;
93
94 kfree(cardp->ep_out_buf);
95 cardp->ep_out_buf = NULL;
96
97 lbtf_deb_leave(LBTF_DEB_USB);
98 }
99
100 static void if_usb_setup_firmware(struct lbtf_private *priv)
101 {
102 struct if_usb_card *cardp = priv->card;
103 struct cmd_ds_set_boot2_ver b2_cmd;
104
105 lbtf_deb_enter(LBTF_DEB_USB);
106
107 if_usb_submit_rx_urb(cardp);
108 b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
109 b2_cmd.action = 0;
110 b2_cmd.version = cardp->boot2_version;
111
112 if (lbtf_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
113 lbtf_deb_usb("Setting boot2 version failed\n");
114
115 lbtf_deb_leave(LBTF_DEB_USB);
116 }
117
118 static void if_usb_fw_timeo(unsigned long priv)
119 {
120 struct if_usb_card *cardp = (void *)priv;
121
122 lbtf_deb_enter(LBTF_DEB_USB);
123 if (!cardp->fwdnldover) {
124 /* Download timed out */
125 cardp->priv->surpriseremoved = 1;
126 pr_err("Download timed out\n");
127 } else {
128 lbtf_deb_usb("Download complete, no event. Assuming success\n");
129 }
130 wake_up(&cardp->fw_wq);
131 lbtf_deb_leave(LBTF_DEB_USB);
132 }
133
134 /**
135 * if_usb_probe - sets the configuration values
136 *
137 * @ifnum interface number
138 * @id pointer to usb_device_id
139 *
140 * Returns: 0 on success, error code on failure
141 */
142 static int if_usb_probe(struct usb_interface *intf,
143 const struct usb_device_id *id)
144 {
145 struct usb_device *udev;
146 struct usb_host_interface *iface_desc;
147 struct usb_endpoint_descriptor *endpoint;
148 struct lbtf_private *priv;
149 struct if_usb_card *cardp;
150 int i;
151
152 lbtf_deb_enter(LBTF_DEB_USB);
153 udev = interface_to_usbdev(intf);
154
155 cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
156 if (!cardp) {
157 pr_err("Out of memory allocating private data.\n");
158 goto error;
159 }
160
161 setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
162 init_waitqueue_head(&cardp->fw_wq);
163
164 cardp->udev = udev;
165 iface_desc = intf->cur_altsetting;
166
167 lbtf_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
168 " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
169 le16_to_cpu(udev->descriptor.bcdUSB),
170 udev->descriptor.bDeviceClass,
171 udev->descriptor.bDeviceSubClass,
172 udev->descriptor.bDeviceProtocol);
173
174 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
175 endpoint = &iface_desc->endpoint[i].desc;
176 if (usb_endpoint_is_bulk_in(endpoint)) {
177 cardp->ep_in_size =
178 le16_to_cpu(endpoint->wMaxPacketSize);
179 cardp->ep_in = usb_endpoint_num(endpoint);
180
181 lbtf_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
182 lbtf_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);
183 } else if (usb_endpoint_is_bulk_out(endpoint)) {
184 cardp->ep_out_size =
185 le16_to_cpu(endpoint->wMaxPacketSize);
186 cardp->ep_out = usb_endpoint_num(endpoint);
187
188 lbtf_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
189 lbtf_deb_usbd(&udev->dev, "Bulk out size is %d\n",
190 cardp->ep_out_size);
191 }
192 }
193 if (!cardp->ep_out_size || !cardp->ep_in_size) {
194 lbtf_deb_usbd(&udev->dev, "Endpoints not found\n");
195 /* Endpoints not found */
196 goto dealloc;
197 }
198
199 cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
200 if (!cardp->rx_urb) {
201 lbtf_deb_usbd(&udev->dev, "Rx URB allocation failed\n");
202 goto dealloc;
203 }
204
205 cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
206 if (!cardp->tx_urb) {
207 lbtf_deb_usbd(&udev->dev, "Tx URB allocation failed\n");
208 goto dealloc;
209 }
210
211 cardp->cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
212 if (!cardp->cmd_urb) {
213 lbtf_deb_usbd(&udev->dev, "Cmd URB allocation failed\n");
214 goto dealloc;
215 }
216
217 cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE,
218 GFP_KERNEL);
219 if (!cardp->ep_out_buf) {
220 lbtf_deb_usbd(&udev->dev, "Could not allocate buffer\n");
221 goto dealloc;
222 }
223
224 priv = lbtf_add_card(cardp, &udev->dev);
225 if (!priv)
226 goto dealloc;
227
228 cardp->priv = priv;
229
230 priv->hw_host_to_card = if_usb_host_to_card;
231 priv->hw_prog_firmware = if_usb_prog_firmware;
232 priv->hw_reset_device = if_usb_reset_device;
233 cardp->boot2_version = udev->descriptor.bcdDevice;
234
235 usb_get_dev(udev);
236 usb_set_intfdata(intf, cardp);
237
238 return 0;
239
240 dealloc:
241 if_usb_free(cardp);
242 error:
243 lbtf_deb_leave(LBTF_DEB_MAIN);
244 return -ENOMEM;
245 }
246
247 /**
248 * if_usb_disconnect - free resource and cleanup
249 *
250 * @intf USB interface structure
251 */
252 static void if_usb_disconnect(struct usb_interface *intf)
253 {
254 struct if_usb_card *cardp = usb_get_intfdata(intf);
255 struct lbtf_private *priv = (struct lbtf_private *) cardp->priv;
256
257 lbtf_deb_enter(LBTF_DEB_MAIN);
258
259 if_usb_reset_device(cardp);
260
261 if (priv)
262 lbtf_remove_card(priv);
263
264 /* Unlink and free urb */
265 if_usb_free(cardp);
266
267 usb_set_intfdata(intf, NULL);
268 usb_put_dev(interface_to_usbdev(intf));
269
270 lbtf_deb_leave(LBTF_DEB_MAIN);
271 }
272
273 /**
274 * if_usb_send_fw_pkt - This function downloads the FW
275 *
276 * @priv pointer to struct lbtf_private
277 *
278 * Returns: 0
279 */
280 static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
281 {
282 struct fwdata *fwdata = cardp->ep_out_buf;
283 u8 *firmware = (u8 *) cardp->fw->data;
284
285 lbtf_deb_enter(LBTF_DEB_FW);
286
287 /* If we got a CRC failure on the last block, back
288 up and retry it */
289 if (!cardp->CRC_OK) {
290 cardp->totalbytes = cardp->fwlastblksent;
291 cardp->fwseqnum--;
292 }
293
294 lbtf_deb_usb2(&cardp->udev->dev, "totalbytes = %d\n",
295 cardp->totalbytes);
296
297 /* struct fwdata (which we sent to the card) has an
298 extra __le32 field in between the header and the data,
299 which is not in the struct fwheader in the actual
300 firmware binary. Insert the seqnum in the middle... */
301 memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
302 sizeof(struct fwheader));
303
304 cardp->fwlastblksent = cardp->totalbytes;
305 cardp->totalbytes += sizeof(struct fwheader);
306
307 memcpy(fwdata->data, &firmware[cardp->totalbytes],
308 le32_to_cpu(fwdata->hdr.datalength));
309
310 lbtf_deb_usb2(&cardp->udev->dev, "Data length = %d\n",
311 le32_to_cpu(fwdata->hdr.datalength));
312
313 fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
314 cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
315
316 usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
317 le32_to_cpu(fwdata->hdr.datalength), 0);
318
319 if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
320 lbtf_deb_usb2(&cardp->udev->dev, "There are data to follow\n");
321 lbtf_deb_usb2(&cardp->udev->dev, "seqnum = %d totalbytes = %d\n",
322 cardp->fwseqnum, cardp->totalbytes);
323 } else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
324 lbtf_deb_usb2(&cardp->udev->dev, "Host has finished FW downloading\n");
325 lbtf_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");
326
327 /* Host has finished FW downloading
328 * Donwloading FW JUMP BLOCK
329 */
330 cardp->fwfinalblk = 1;
331 }
332
333 lbtf_deb_usb2(&cardp->udev->dev, "Firmware download done; size %d\n",
334 cardp->totalbytes);
335
336 lbtf_deb_leave(LBTF_DEB_FW);
337 return 0;
338 }
339
340 static int if_usb_reset_device(struct if_usb_card *cardp)
341 {
342 struct cmd_ds_802_11_reset *cmd = cardp->ep_out_buf + 4;
343 int ret;
344
345 lbtf_deb_enter(LBTF_DEB_USB);
346
347 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
348
349 cmd->hdr.command = cpu_to_le16(CMD_802_11_RESET);
350 cmd->hdr.size = cpu_to_le16(sizeof(struct cmd_ds_802_11_reset));
351 cmd->hdr.result = cpu_to_le16(0);
352 cmd->hdr.seqnum = cpu_to_le16(0x5a5a);
353 cmd->action = cpu_to_le16(CMD_ACT_HALT);
354 usb_tx_block(cardp, cardp->ep_out_buf,
355 4 + sizeof(struct cmd_ds_802_11_reset), 0);
356
357 msleep(100);
358 ret = usb_reset_device(cardp->udev);
359 msleep(100);
360
361 lbtf_deb_leave_args(LBTF_DEB_USB, "ret %d", ret);
362
363 return ret;
364 }
365 EXPORT_SYMBOL_GPL(if_usb_reset_device);
366
367 /**
368 * usb_tx_block - transfer data to the device
369 *
370 * @priv pointer to struct lbtf_private
371 * @payload pointer to payload data
372 * @nb data length
373 * @data non-zero for data, zero for commands
374 *
375 * Returns: 0 on success, nonzero otherwise.
376 */
377 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
378 uint16_t nb, u8 data)
379 {
380 int ret = -1;
381 struct urb *urb;
382
383 lbtf_deb_enter(LBTF_DEB_USB);
384 /* check if device is removed */
385 if (cardp->priv->surpriseremoved) {
386 lbtf_deb_usbd(&cardp->udev->dev, "Device removed\n");
387 goto tx_ret;
388 }
389
390 if (data)
391 urb = cardp->tx_urb;
392 else
393 urb = cardp->cmd_urb;
394
395 usb_fill_bulk_urb(urb, cardp->udev,
396 usb_sndbulkpipe(cardp->udev,
397 cardp->ep_out),
398 payload, nb, if_usb_write_bulk_callback, cardp);
399
400 urb->transfer_flags |= URB_ZERO_PACKET;
401
402 if (usb_submit_urb(urb, GFP_ATOMIC)) {
403 lbtf_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed: %d\n", ret);
404 goto tx_ret;
405 }
406
407 lbtf_deb_usb2(&cardp->udev->dev, "usb_submit_urb success\n");
408
409 ret = 0;
410
411 tx_ret:
412 lbtf_deb_leave(LBTF_DEB_USB);
413 return ret;
414 }
415
416 static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
417 void (*callbackfn)(struct urb *urb))
418 {
419 struct sk_buff *skb;
420 int ret = -1;
421
422 lbtf_deb_enter(LBTF_DEB_USB);
423
424 skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
425 if (!skb) {
426 pr_err("No free skb\n");
427 lbtf_deb_leave(LBTF_DEB_USB);
428 return -1;
429 }
430
431 cardp->rx_skb = skb;
432
433 /* Fill the receive configuration URB and initialise the Rx call back */
434 usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
435 usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
436 skb_tail_pointer(skb),
437 MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn, cardp);
438
439 cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
440
441 lbtf_deb_usb2(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb);
442 ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC);
443 if (ret) {
444 lbtf_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed: %d\n", ret);
445 kfree_skb(skb);
446 cardp->rx_skb = NULL;
447 lbtf_deb_leave(LBTF_DEB_USB);
448 return -1;
449 } else {
450 lbtf_deb_usb2(&cardp->udev->dev, "Submit Rx URB success\n");
451 lbtf_deb_leave(LBTF_DEB_USB);
452 return 0;
453 }
454 }
455
456 static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
457 {
458 return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
459 }
460
461 static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
462 {
463 return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
464 }
465
466 static void if_usb_receive_fwload(struct urb *urb)
467 {
468 struct if_usb_card *cardp = urb->context;
469 struct sk_buff *skb = cardp->rx_skb;
470 struct fwsyncheader *syncfwheader;
471 struct bootcmdresp bcmdresp;
472
473 lbtf_deb_enter(LBTF_DEB_USB);
474 if (urb->status) {
475 lbtf_deb_usbd(&cardp->udev->dev,
476 "URB status is failed during fw load\n");
477 kfree_skb(skb);
478 lbtf_deb_leave(LBTF_DEB_USB);
479 return;
480 }
481
482 if (cardp->fwdnldover) {
483 __le32 *tmp = (__le32 *)(skb->data);
484
485 if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
486 tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY)) {
487 /* Firmware ready event received */
488 pr_info("Firmware ready event received\n");
489 wake_up(&cardp->fw_wq);
490 } else {
491 lbtf_deb_usb("Waiting for confirmation; got %x %x\n",
492 le32_to_cpu(tmp[0]), le32_to_cpu(tmp[1]));
493 if_usb_submit_rx_urb_fwload(cardp);
494 }
495 kfree_skb(skb);
496 lbtf_deb_leave(LBTF_DEB_USB);
497 return;
498 }
499 if (cardp->bootcmdresp <= 0) {
500 memcpy(&bcmdresp, skb->data, sizeof(bcmdresp));
501
502 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
503 kfree_skb(skb);
504 if_usb_submit_rx_urb_fwload(cardp);
505 cardp->bootcmdresp = 1;
506 /* Received valid boot command response */
507 lbtf_deb_usbd(&cardp->udev->dev,
508 "Received valid boot command response\n");
509 lbtf_deb_leave(LBTF_DEB_USB);
510 return;
511 }
512 if (bcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
513 if (bcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
514 bcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
515 bcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION)) {
516 if (!cardp->bootcmdresp)
517 pr_info("Firmware already seems alive; resetting\n");
518 cardp->bootcmdresp = -1;
519 } else {
520 pr_info("boot cmd response wrong magic number (0x%x)\n",
521 le32_to_cpu(bcmdresp.magic));
522 }
523 } else if (bcmdresp.cmd != BOOT_CMD_FW_BY_USB) {
524 pr_info("boot cmd response cmd_tag error (%d)\n",
525 bcmdresp.cmd);
526 } else if (bcmdresp.result != BOOT_CMD_RESP_OK) {
527 pr_info("boot cmd response result error (%d)\n",
528 bcmdresp.result);
529 } else {
530 cardp->bootcmdresp = 1;
531 lbtf_deb_usbd(&cardp->udev->dev,
532 "Received valid boot command response\n");
533 }
534
535 kfree_skb(skb);
536 if_usb_submit_rx_urb_fwload(cardp);
537 lbtf_deb_leave(LBTF_DEB_USB);
538 return;
539 }
540
541 syncfwheader = kmalloc(sizeof(struct fwsyncheader), GFP_ATOMIC);
542 if (!syncfwheader) {
543 lbtf_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
544 kfree_skb(skb);
545 lbtf_deb_leave(LBTF_DEB_USB);
546 return;
547 }
548
549 memcpy(syncfwheader, skb->data, sizeof(struct fwsyncheader));
550
551 if (!syncfwheader->cmd) {
552 lbtf_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
553 lbtf_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",
554 le32_to_cpu(syncfwheader->seqnum));
555 cardp->CRC_OK = 1;
556 } else {
557 lbtf_deb_usbd(&cardp->udev->dev, "FW received Blk with CRC error\n");
558 cardp->CRC_OK = 0;
559 }
560
561 kfree_skb(skb);
562
563 /* reschedule timer for 200ms hence */
564 mod_timer(&cardp->fw_timeout, jiffies + (HZ/5));
565
566 if (cardp->fwfinalblk) {
567 cardp->fwdnldover = 1;
568 goto exit;
569 }
570
571 if_usb_send_fw_pkt(cardp);
572
573 exit:
574 if_usb_submit_rx_urb_fwload(cardp);
575
576 kfree(syncfwheader);
577
578 lbtf_deb_leave(LBTF_DEB_USB);
579 }
580
581 #define MRVDRV_MIN_PKT_LEN 30
582
583 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
584 struct if_usb_card *cardp,
585 struct lbtf_private *priv)
586 {
587 if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
588 || recvlength < MRVDRV_MIN_PKT_LEN) {
589 lbtf_deb_usbd(&cardp->udev->dev, "Packet length is Invalid\n");
590 kfree_skb(skb);
591 return;
592 }
593
594 skb_put(skb, recvlength);
595 skb_pull(skb, MESSAGE_HEADER_LEN);
596 lbtf_rx(priv, skb);
597 }
598
599 static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
600 struct sk_buff *skb,
601 struct if_usb_card *cardp,
602 struct lbtf_private *priv)
603 {
604 if (recvlength > LBS_CMD_BUFFER_SIZE) {
605 lbtf_deb_usbd(&cardp->udev->dev,
606 "The receive buffer is too large\n");
607 kfree_skb(skb);
608 return;
609 }
610
611 BUG_ON(!in_interrupt());
612
613 spin_lock(&priv->driver_lock);
614 memcpy(priv->cmd_resp_buff, recvbuff + MESSAGE_HEADER_LEN,
615 recvlength - MESSAGE_HEADER_LEN);
616 kfree_skb(skb);
617 lbtf_cmd_response_rx(priv);
618 spin_unlock(&priv->driver_lock);
619 }
620
621 /**
622 * if_usb_receive - read data received from the device.
623 *
624 * @urb pointer to struct urb
625 */
626 static void if_usb_receive(struct urb *urb)
627 {
628 struct if_usb_card *cardp = urb->context;
629 struct sk_buff *skb = cardp->rx_skb;
630 struct lbtf_private *priv = cardp->priv;
631 int recvlength = urb->actual_length;
632 uint8_t *recvbuff = NULL;
633 uint32_t recvtype = 0;
634 __le32 *pkt = (__le32 *) skb->data;
635
636 lbtf_deb_enter(LBTF_DEB_USB);
637
638 if (recvlength) {
639 if (urb->status) {
640 lbtf_deb_usbd(&cardp->udev->dev, "RX URB failed: %d\n",
641 urb->status);
642 kfree_skb(skb);
643 goto setup_for_next;
644 }
645
646 recvbuff = skb->data;
647 recvtype = le32_to_cpu(pkt[0]);
648 lbtf_deb_usbd(&cardp->udev->dev,
649 "Recv length = 0x%x, Recv type = 0x%X\n",
650 recvlength, recvtype);
651 } else if (urb->status) {
652 kfree_skb(skb);
653 lbtf_deb_leave(LBTF_DEB_USB);
654 return;
655 }
656
657 switch (recvtype) {
658 case CMD_TYPE_DATA:
659 process_cmdtypedata(recvlength, skb, cardp, priv);
660 break;
661
662 case CMD_TYPE_REQUEST:
663 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
664 break;
665
666 case CMD_TYPE_INDICATION:
667 {
668 /* Event cause handling */
669 u32 event_cause = le32_to_cpu(pkt[1]);
670 lbtf_deb_usbd(&cardp->udev->dev, "**EVENT** 0x%X\n", event_cause);
671
672 /* Icky undocumented magic special case */
673 if (event_cause & 0xffff0000) {
674 u16 tmp;
675 u8 retrycnt;
676 u8 failure;
677
678 tmp = event_cause >> 16;
679 retrycnt = tmp & 0x00ff;
680 failure = (tmp & 0xff00) >> 8;
681 lbtf_send_tx_feedback(priv, retrycnt, failure);
682 } else if (event_cause == LBTF_EVENT_BCN_SENT)
683 lbtf_bcn_sent(priv);
684 else
685 lbtf_deb_usbd(&cardp->udev->dev,
686 "Unsupported notification %d received\n",
687 event_cause);
688 kfree_skb(skb);
689 break;
690 }
691 default:
692 lbtf_deb_usbd(&cardp->udev->dev,
693 "libertastf: unknown command type 0x%X\n", recvtype);
694 kfree_skb(skb);
695 break;
696 }
697
698 setup_for_next:
699 if_usb_submit_rx_urb(cardp);
700 lbtf_deb_leave(LBTF_DEB_USB);
701 }
702
703 /**
704 * if_usb_host_to_card - Download data to the device
705 *
706 * @priv pointer to struct lbtf_private structure
707 * @type type of data
708 * @buf pointer to data buffer
709 * @len number of bytes
710 *
711 * Returns: 0 on success, nonzero otherwise
712 */
713 static int if_usb_host_to_card(struct lbtf_private *priv, uint8_t type,
714 uint8_t *payload, uint16_t nb)
715 {
716 struct if_usb_card *cardp = priv->card;
717 u8 data = 0;
718
719 lbtf_deb_usbd(&cardp->udev->dev, "*** type = %u\n", type);
720 lbtf_deb_usbd(&cardp->udev->dev, "size after = %d\n", nb);
721
722 if (type == MVMS_CMD) {
723 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
724 } else {
725 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
726 data = 1;
727 }
728
729 memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
730
731 return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN,
732 data);
733 }
734
735 /**
736 * if_usb_issue_boot_command - Issue boot command to Boot2.
737 *
738 * @ivalue 1 boots from FW by USB-Download, 2 boots from FW in EEPROM.
739 *
740 * Returns: 0
741 */
742 static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
743 {
744 struct bootcmd *bootcmd = cardp->ep_out_buf;
745
746 /* Prepare command */
747 bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
748 bootcmd->cmd = ivalue;
749 memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
750
751 /* Issue command */
752 usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd), 0);
753
754 return 0;
755 }
756
757
758 /**
759 * check_fwfile_format - Check the validity of Boot2/FW image.
760 *
761 * @data pointer to image
762 * @totlen image length
763 *
764 * Returns: 0 if the image is valid, nonzero otherwise.
765 */
766 static int check_fwfile_format(const u8 *data, u32 totlen)
767 {
768 u32 bincmd, exit;
769 u32 blksize, offset, len;
770 int ret;
771
772 ret = 1;
773 exit = len = 0;
774
775 do {
776 struct fwheader *fwh = (void *) data;
777
778 bincmd = le32_to_cpu(fwh->dnldcmd);
779 blksize = le32_to_cpu(fwh->datalength);
780 switch (bincmd) {
781 case FW_HAS_DATA_TO_RECV:
782 offset = sizeof(struct fwheader) + blksize;
783 data += offset;
784 len += offset;
785 if (len >= totlen)
786 exit = 1;
787 break;
788 case FW_HAS_LAST_BLOCK:
789 exit = 1;
790 ret = 0;
791 break;
792 default:
793 exit = 1;
794 break;
795 }
796 } while (!exit);
797
798 if (ret)
799 pr_err("firmware file format check FAIL\n");
800 else
801 lbtf_deb_fw("firmware file format check PASS\n");
802
803 return ret;
804 }
805
806
807 static int if_usb_prog_firmware(struct if_usb_card *cardp)
808 {
809 int i = 0;
810 static int reset_count = 10;
811 int ret = 0;
812
813 lbtf_deb_enter(LBTF_DEB_USB);
814
815 ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
816 if (ret < 0) {
817 pr_err("request_firmware() failed with %#x\n", ret);
818 pr_err("firmware %s not found\n", lbtf_fw_name);
819 goto done;
820 }
821
822 if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
823 goto release_fw;
824
825 restart:
826 if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
827 lbtf_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
828 ret = -1;
829 goto release_fw;
830 }
831
832 cardp->bootcmdresp = 0;
833 do {
834 int j = 0;
835 i++;
836 /* Issue Boot command = 1, Boot from Download-FW */
837 if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
838 /* wait for command response */
839 do {
840 j++;
841 msleep_interruptible(100);
842 } while (cardp->bootcmdresp == 0 && j < 10);
843 } while (cardp->bootcmdresp == 0 && i < 5);
844
845 if (cardp->bootcmdresp <= 0) {
846 if (--reset_count >= 0) {
847 if_usb_reset_device(cardp);
848 goto restart;
849 }
850 return -1;
851 }
852
853 i = 0;
854
855 cardp->totalbytes = 0;
856 cardp->fwlastblksent = 0;
857 cardp->CRC_OK = 1;
858 cardp->fwdnldover = 0;
859 cardp->fwseqnum = -1;
860 cardp->totalbytes = 0;
861 cardp->fwfinalblk = 0;
862
863 /* Send the first firmware packet... */
864 if_usb_send_fw_pkt(cardp);
865
866 /* ... and wait for the process to complete */
867 wait_event_interruptible(cardp->fw_wq, cardp->priv->surpriseremoved ||
868 cardp->fwdnldover);
869
870 del_timer_sync(&cardp->fw_timeout);
871 usb_kill_urb(cardp->rx_urb);
872
873 if (!cardp->fwdnldover) {
874 pr_info("failed to load fw, resetting device!\n");
875 if (--reset_count >= 0) {
876 if_usb_reset_device(cardp);
877 goto restart;
878 }
879
880 pr_info("FW download failure, time = %d ms\n", i * 100);
881 ret = -1;
882 goto release_fw;
883 }
884
885 cardp->priv->fw_ready = 1;
886
887 release_fw:
888 release_firmware(cardp->fw);
889 cardp->fw = NULL;
890
891 if_usb_setup_firmware(cardp->priv);
892
893 done:
894 lbtf_deb_leave_args(LBTF_DEB_USB, "ret %d", ret);
895 return ret;
896 }
897 EXPORT_SYMBOL_GPL(if_usb_prog_firmware);
898
899
900 #define if_usb_suspend NULL
901 #define if_usb_resume NULL
902
903 static struct usb_driver if_usb_driver = {
904 .name = DRV_NAME,
905 .probe = if_usb_probe,
906 .disconnect = if_usb_disconnect,
907 .id_table = if_usb_table,
908 .suspend = if_usb_suspend,
909 .resume = if_usb_resume,
910 };
911
912 static int __init if_usb_init_module(void)
913 {
914 int ret = 0;
915
916 lbtf_deb_enter(LBTF_DEB_MAIN);
917
918 ret = usb_register(&if_usb_driver);
919
920 lbtf_deb_leave_args(LBTF_DEB_MAIN, "ret %d", ret);
921 return ret;
922 }
923
924 static void __exit if_usb_exit_module(void)
925 {
926 lbtf_deb_enter(LBTF_DEB_MAIN);
927 usb_deregister(&if_usb_driver);
928 lbtf_deb_leave(LBTF_DEB_MAIN);
929 }
930
931 module_init(if_usb_init_module);
932 module_exit(if_usb_exit_module);
933
934 MODULE_DESCRIPTION("8388 USB WLAN Thinfirm Driver");
935 MODULE_AUTHOR("Cozybit Inc.");
936 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)