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1/*
2 * This file contains functions used in USB interface module.
3 */
4
5#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6
7#include <linux/delay.h>
8#include <linux/module.h>
9#include <linux/firmware.h>
10#include <linux/netdevice.h>
11#include <linux/slab.h>
12#include <linux/usb.h>
13#include <linux/olpc-ec.h>
14
15#ifdef CONFIG_OLPC
16#include <asm/olpc.h>
17#endif
18
19#define DRV_NAME "usb8xxx"
20
21#include "host.h"
22#include "decl.h"
23#include "defs.h"
24#include "dev.h"
25#include "cmd.h"
26#include "if_usb.h"
27
28#define INSANEDEBUG 0
29#define lbs_deb_usb2(...) do { if (INSANEDEBUG) lbs_deb_usbd(__VA_ARGS__); } while (0)
30
31#define MESSAGE_HEADER_LEN 4
32
33MODULE_FIRMWARE("libertas/usb8388_v9.bin");
34MODULE_FIRMWARE("libertas/usb8388_v5.bin");
35MODULE_FIRMWARE("libertas/usb8388.bin");
36MODULE_FIRMWARE("libertas/usb8682.bin");
37MODULE_FIRMWARE("usb8388.bin");
38
39enum {
40 MODEL_UNKNOWN = 0x0,
41 MODEL_8388 = 0x1,
42 MODEL_8682 = 0x2
43};
44
45/* table of firmware file names */
46static const struct lbs_fw_table fw_table[] = {
47 { MODEL_8388, "libertas/usb8388_olpc.bin", NULL },
48 { MODEL_8388, "libertas/usb8388_v9.bin", NULL },
49 { MODEL_8388, "libertas/usb8388_v5.bin", NULL },
50 { MODEL_8388, "libertas/usb8388.bin", NULL },
51 { MODEL_8388, "usb8388.bin", NULL },
52 { MODEL_8682, "libertas/usb8682.bin", NULL }
53};
54
55static struct usb_device_id if_usb_table[] = {
56 /* Enter the device signature inside */
57 { USB_DEVICE(0x1286, 0x2001), .driver_info = MODEL_8388 },
58 { USB_DEVICE(0x05a3, 0x8388), .driver_info = MODEL_8388 },
59 {} /* Terminating entry */
60};
61
62MODULE_DEVICE_TABLE(usb, if_usb_table);
63
64static void if_usb_receive(struct urb *urb);
65static void if_usb_receive_fwload(struct urb *urb);
66static void if_usb_prog_firmware(struct lbs_private *priv, int ret,
67 const struct firmware *fw,
68 const struct firmware *unused);
69static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
70 uint8_t *payload, uint16_t nb);
71static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
72 uint16_t nb);
73static void if_usb_free(struct if_usb_card *cardp);
74static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
75static int if_usb_reset_device(struct if_usb_card *cardp);
76
77/**
78 * if_usb_write_bulk_callback - callback function to handle the status
79 * of the URB
80 * @urb: pointer to &urb structure
81 * returns: N/A
82 */
83static void if_usb_write_bulk_callback(struct urb *urb)
84{
85 struct if_usb_card *cardp = (struct if_usb_card *) urb->context;
86
87 /* handle the transmission complete validations */
88
89 if (urb->status == 0) {
90 struct lbs_private *priv = cardp->priv;
91
92 lbs_deb_usb2(&urb->dev->dev, "URB status is successful\n");
93 lbs_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
94 urb->actual_length);
95
96 /* Boot commands such as UPDATE_FW and UPDATE_BOOT2 are not
97 * passed up to the lbs level.
98 */
99 if (priv && priv->dnld_sent != DNLD_BOOTCMD_SENT)
100 lbs_host_to_card_done(priv);
101 } else {
102 /* print the failure status number for debug */
103 pr_info("URB in failure status: %d\n", urb->status);
104 }
105}
106
107/**
108 * if_usb_free - free tx/rx urb, skb and rx buffer
109 * @cardp: pointer to &if_usb_card
110 * returns: N/A
111 */
112static void if_usb_free(struct if_usb_card *cardp)
113{
114 lbs_deb_enter(LBS_DEB_USB);
115
116 /* Unlink tx & rx urb */
117 usb_kill_urb(cardp->tx_urb);
118 usb_kill_urb(cardp->rx_urb);
119
120 usb_free_urb(cardp->tx_urb);
121 cardp->tx_urb = NULL;
122
123 usb_free_urb(cardp->rx_urb);
124 cardp->rx_urb = NULL;
125
126 kfree(cardp->ep_out_buf);
127 cardp->ep_out_buf = NULL;
128
129 lbs_deb_leave(LBS_DEB_USB);
130}
131
132static void if_usb_setup_firmware(struct lbs_private *priv)
133{
134 struct if_usb_card *cardp = priv->card;
135 struct cmd_ds_set_boot2_ver b2_cmd;
136 struct cmd_ds_802_11_fw_wake_method wake_method;
137
138 b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
139 b2_cmd.action = 0;
140 b2_cmd.version = cardp->boot2_version;
141
142 if (lbs_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
143 lbs_deb_usb("Setting boot2 version failed\n");
144
145 priv->wol_gpio = 2; /* Wake via GPIO2... */
146 priv->wol_gap = 20; /* ... after 20ms */
147 lbs_host_sleep_cfg(priv, EHS_WAKE_ON_UNICAST_DATA,
148 (struct wol_config *) NULL);
149
150 wake_method.hdr.size = cpu_to_le16(sizeof(wake_method));
151 wake_method.action = cpu_to_le16(CMD_ACT_GET);
152 if (lbs_cmd_with_response(priv, CMD_802_11_FW_WAKE_METHOD, &wake_method)) {
153 netdev_info(priv->dev, "Firmware does not seem to support PS mode\n");
154 priv->fwcapinfo &= ~FW_CAPINFO_PS;
155 } else {
156 if (le16_to_cpu(wake_method.method) == CMD_WAKE_METHOD_COMMAND_INT) {
157 lbs_deb_usb("Firmware seems to support PS with wake-via-command\n");
158 } else {
159 /* The versions which boot up this way don't seem to
160 work even if we set it to the command interrupt */
161 priv->fwcapinfo &= ~FW_CAPINFO_PS;
162 netdev_info(priv->dev,
163 "Firmware doesn't wake via command interrupt; disabling PS mode\n");
164 }
165 }
166}
167
168static void if_usb_fw_timeo(unsigned long priv)
169{
170 struct if_usb_card *cardp = (void *)priv;
171
172 if (cardp->fwdnldover) {
173 lbs_deb_usb("Download complete, no event. Assuming success\n");
174 } else {
175 pr_err("Download timed out\n");
176 cardp->surprise_removed = 1;
177 }
178 wake_up(&cardp->fw_wq);
179}
180
181#ifdef CONFIG_OLPC
182static void if_usb_reset_olpc_card(struct lbs_private *priv)
183{
184 printk(KERN_CRIT "Resetting OLPC wireless via EC...\n");
185 olpc_ec_cmd(0x25, NULL, 0, NULL, 0);
186}
187#endif
188
189/**
190 * if_usb_probe - sets the configuration values
191 * @intf: &usb_interface pointer
192 * @id: pointer to usb_device_id
193 * returns: 0 on success, error code on failure
194 */
195static int if_usb_probe(struct usb_interface *intf,
196 const struct usb_device_id *id)
197{
198 struct usb_device *udev;
199 struct usb_host_interface *iface_desc;
200 struct usb_endpoint_descriptor *endpoint;
201 struct lbs_private *priv;
202 struct if_usb_card *cardp;
203 int r = -ENOMEM;
204 int i;
205
206 udev = interface_to_usbdev(intf);
207
208 cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
209 if (!cardp)
210 goto error;
211
212 setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
213 init_waitqueue_head(&cardp->fw_wq);
214
215 cardp->udev = udev;
216 cardp->model = (uint32_t) id->driver_info;
217 iface_desc = intf->cur_altsetting;
218
219 lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
220 " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
221 le16_to_cpu(udev->descriptor.bcdUSB),
222 udev->descriptor.bDeviceClass,
223 udev->descriptor.bDeviceSubClass,
224 udev->descriptor.bDeviceProtocol);
225
226 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
227 endpoint = &iface_desc->endpoint[i].desc;
228 if (usb_endpoint_is_bulk_in(endpoint)) {
229 cardp->ep_in_size = le16_to_cpu(endpoint->wMaxPacketSize);
230 cardp->ep_in = usb_endpoint_num(endpoint);
231
232 lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
233 lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);
234
235 } else if (usb_endpoint_is_bulk_out(endpoint)) {
236 cardp->ep_out_size = le16_to_cpu(endpoint->wMaxPacketSize);
237 cardp->ep_out = usb_endpoint_num(endpoint);
238
239 lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
240 lbs_deb_usbd(&udev->dev, "Bulk out size is %d\n", cardp->ep_out_size);
241 }
242 }
243 if (!cardp->ep_out_size || !cardp->ep_in_size) {
244 lbs_deb_usbd(&udev->dev, "Endpoints not found\n");
245 goto dealloc;
246 }
247 if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
248 lbs_deb_usbd(&udev->dev, "Rx URB allocation failed\n");
249 goto dealloc;
250 }
251 if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
252 lbs_deb_usbd(&udev->dev, "Tx URB allocation failed\n");
253 goto dealloc;
254 }
255 cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE, GFP_KERNEL);
256 if (!cardp->ep_out_buf) {
257 lbs_deb_usbd(&udev->dev, "Could not allocate buffer\n");
258 goto dealloc;
259 }
260
261 if (!(priv = lbs_add_card(cardp, &intf->dev)))
262 goto err_add_card;
263
264 cardp->priv = priv;
265
266 priv->hw_host_to_card = if_usb_host_to_card;
267 priv->enter_deep_sleep = NULL;
268 priv->exit_deep_sleep = NULL;
269 priv->reset_deep_sleep_wakeup = NULL;
270#ifdef CONFIG_OLPC
271 if (machine_is_olpc())
272 priv->reset_card = if_usb_reset_olpc_card;
273#endif
274
275 cardp->boot2_version = udev->descriptor.bcdDevice;
276
277 usb_get_dev(udev);
278 usb_set_intfdata(intf, cardp);
279
280 r = lbs_get_firmware_async(priv, &udev->dev, cardp->model,
281 fw_table, if_usb_prog_firmware);
282 if (r)
283 goto err_get_fw;
284
285 return 0;
286
287err_get_fw:
288 lbs_remove_card(priv);
289err_add_card:
290 if_usb_reset_device(cardp);
291dealloc:
292 if_usb_free(cardp);
293
294error:
295 return r;
296}
297
298/**
299 * if_usb_disconnect - free resource and cleanup
300 * @intf: USB interface structure
301 * returns: N/A
302 */
303static void if_usb_disconnect(struct usb_interface *intf)
304{
305 struct if_usb_card *cardp = usb_get_intfdata(intf);
306 struct lbs_private *priv = cardp->priv;
307
308 lbs_deb_enter(LBS_DEB_MAIN);
309
310 cardp->surprise_removed = 1;
311
312 if (priv) {
313 lbs_stop_card(priv);
314 lbs_remove_card(priv);
315 }
316
317 /* Unlink and free urb */
318 if_usb_free(cardp);
319
320 usb_set_intfdata(intf, NULL);
321 usb_put_dev(interface_to_usbdev(intf));
322
323 lbs_deb_leave(LBS_DEB_MAIN);
324}
325
326/**
327 * if_usb_send_fw_pkt - download FW
328 * @cardp: pointer to &struct if_usb_card
329 * returns: 0
330 */
331static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
332{
333 struct fwdata *fwdata = cardp->ep_out_buf;
334 const uint8_t *firmware = cardp->fw->data;
335
336 /* If we got a CRC failure on the last block, back
337 up and retry it */
338 if (!cardp->CRC_OK) {
339 cardp->totalbytes = cardp->fwlastblksent;
340 cardp->fwseqnum--;
341 }
342
343 lbs_deb_usb2(&cardp->udev->dev, "totalbytes = %d\n",
344 cardp->totalbytes);
345
346 /* struct fwdata (which we sent to the card) has an
347 extra __le32 field in between the header and the data,
348 which is not in the struct fwheader in the actual
349 firmware binary. Insert the seqnum in the middle... */
350 memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
351 sizeof(struct fwheader));
352
353 cardp->fwlastblksent = cardp->totalbytes;
354 cardp->totalbytes += sizeof(struct fwheader);
355
356 memcpy(fwdata->data, &firmware[cardp->totalbytes],
357 le32_to_cpu(fwdata->hdr.datalength));
358
359 lbs_deb_usb2(&cardp->udev->dev, "Data length = %d\n",
360 le32_to_cpu(fwdata->hdr.datalength));
361
362 fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
363 cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
364
365 usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
366 le32_to_cpu(fwdata->hdr.datalength));
367
368 if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
369 lbs_deb_usb2(&cardp->udev->dev, "There are data to follow\n");
370 lbs_deb_usb2(&cardp->udev->dev, "seqnum = %d totalbytes = %d\n",
371 cardp->fwseqnum, cardp->totalbytes);
372 } else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
373 lbs_deb_usb2(&cardp->udev->dev, "Host has finished FW downloading\n");
374 lbs_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");
375
376 cardp->fwfinalblk = 1;
377 }
378
379 lbs_deb_usb2(&cardp->udev->dev, "Firmware download done; size %d\n",
380 cardp->totalbytes);
381
382 return 0;
383}
384
385static int if_usb_reset_device(struct if_usb_card *cardp)
386{
387 struct cmd_header *cmd = cardp->ep_out_buf + 4;
388 int ret;
389
390 lbs_deb_enter(LBS_DEB_USB);
391
392 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
393
394 cmd->command = cpu_to_le16(CMD_802_11_RESET);
395 cmd->size = cpu_to_le16(sizeof(cmd));
396 cmd->result = cpu_to_le16(0);
397 cmd->seqnum = cpu_to_le16(0x5a5a);
398 usb_tx_block(cardp, cardp->ep_out_buf, 4 + sizeof(struct cmd_header));
399
400 msleep(100);
401 ret = usb_reset_device(cardp->udev);
402 msleep(100);
403
404#ifdef CONFIG_OLPC
405 if (ret && machine_is_olpc())
406 if_usb_reset_olpc_card(NULL);
407#endif
408
409 lbs_deb_leave_args(LBS_DEB_USB, "ret %d", ret);
410
411 return ret;
412}
413
414/**
415 * usb_tx_block - transfer the data to the device
416 * @cardp: pointer to &struct if_usb_card
417 * @payload: pointer to payload data
418 * @nb: data length
419 * returns: 0 for success or negative error code
420 */
421static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload, uint16_t nb)
422{
423 int ret;
424
425 /* check if device is removed */
426 if (cardp->surprise_removed) {
427 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
428 ret = -ENODEV;
429 goto tx_ret;
430 }
431
432 usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
433 usb_sndbulkpipe(cardp->udev,
434 cardp->ep_out),
435 payload, nb, if_usb_write_bulk_callback, cardp);
436
437 cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
438
439 if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
440 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed: %d\n", ret);
441 } else {
442 lbs_deb_usb2(&cardp->udev->dev, "usb_submit_urb success\n");
443 ret = 0;
444 }
445
446tx_ret:
447 return ret;
448}
449
450static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
451 void (*callbackfn)(struct urb *urb))
452{
453 struct sk_buff *skb;
454 int ret = -1;
455
456 if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
457 pr_err("No free skb\n");
458 goto rx_ret;
459 }
460
461 cardp->rx_skb = skb;
462
463 /* Fill the receive configuration URB and initialise the Rx call back */
464 usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
465 usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
466 skb->data + IPFIELD_ALIGN_OFFSET,
467 MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
468 cardp);
469
470 cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
471
472 lbs_deb_usb2(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb);
473 if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
474 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed: %d\n", ret);
475 kfree_skb(skb);
476 cardp->rx_skb = NULL;
477 ret = -1;
478 } else {
479 lbs_deb_usb2(&cardp->udev->dev, "Submit Rx URB success\n");
480 ret = 0;
481 }
482
483rx_ret:
484 return ret;
485}
486
487static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
488{
489 return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
490}
491
492static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
493{
494 return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
495}
496
497static void if_usb_receive_fwload(struct urb *urb)
498{
499 struct if_usb_card *cardp = urb->context;
500 struct sk_buff *skb = cardp->rx_skb;
501 struct fwsyncheader *syncfwheader;
502 struct bootcmdresp bootcmdresp;
503
504 if (urb->status) {
505 lbs_deb_usbd(&cardp->udev->dev,
506 "URB status is failed during fw load\n");
507 kfree_skb(skb);
508 return;
509 }
510
511 if (cardp->fwdnldover) {
512 __le32 *tmp = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
513
514 if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
515 tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY)) {
516 pr_info("Firmware ready event received\n");
517 wake_up(&cardp->fw_wq);
518 } else {
519 lbs_deb_usb("Waiting for confirmation; got %x %x\n",
520 le32_to_cpu(tmp[0]), le32_to_cpu(tmp[1]));
521 if_usb_submit_rx_urb_fwload(cardp);
522 }
523 kfree_skb(skb);
524 return;
525 }
526 if (cardp->bootcmdresp <= 0) {
527 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
528 sizeof(bootcmdresp));
529
530 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
531 kfree_skb(skb);
532 if_usb_submit_rx_urb_fwload(cardp);
533 cardp->bootcmdresp = BOOT_CMD_RESP_OK;
534 lbs_deb_usbd(&cardp->udev->dev,
535 "Received valid boot command response\n");
536 return;
537 }
538 if (bootcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
539 if (bootcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
540 bootcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
541 bootcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION)) {
542 if (!cardp->bootcmdresp)
543 pr_info("Firmware already seems alive; resetting\n");
544 cardp->bootcmdresp = -1;
545 } else {
546 pr_info("boot cmd response wrong magic number (0x%x)\n",
547 le32_to_cpu(bootcmdresp.magic));
548 }
549 } else if ((bootcmdresp.cmd != BOOT_CMD_FW_BY_USB) &&
550 (bootcmdresp.cmd != BOOT_CMD_UPDATE_FW) &&
551 (bootcmdresp.cmd != BOOT_CMD_UPDATE_BOOT2)) {
552 pr_info("boot cmd response cmd_tag error (%d)\n",
553 bootcmdresp.cmd);
554 } else if (bootcmdresp.result != BOOT_CMD_RESP_OK) {
555 pr_info("boot cmd response result error (%d)\n",
556 bootcmdresp.result);
557 } else {
558 cardp->bootcmdresp = 1;
559 lbs_deb_usbd(&cardp->udev->dev,
560 "Received valid boot command response\n");
561 }
562 kfree_skb(skb);
563 if_usb_submit_rx_urb_fwload(cardp);
564 return;
565 }
566
567 syncfwheader = kmemdup(skb->data + IPFIELD_ALIGN_OFFSET,
568 sizeof(struct fwsyncheader), GFP_ATOMIC);
569 if (!syncfwheader) {
570 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
571 kfree_skb(skb);
572 return;
573 }
574
575 if (!syncfwheader->cmd) {
576 lbs_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
577 lbs_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",
578 le32_to_cpu(syncfwheader->seqnum));
579 cardp->CRC_OK = 1;
580 } else {
581 lbs_deb_usbd(&cardp->udev->dev, "FW received Blk with CRC error\n");
582 cardp->CRC_OK = 0;
583 }
584
585 kfree_skb(skb);
586
587 /* Give device 5s to either write firmware to its RAM or eeprom */
588 mod_timer(&cardp->fw_timeout, jiffies + (HZ*5));
589
590 if (cardp->fwfinalblk) {
591 cardp->fwdnldover = 1;
592 goto exit;
593 }
594
595 if_usb_send_fw_pkt(cardp);
596
597 exit:
598 if_usb_submit_rx_urb_fwload(cardp);
599
600 kfree(syncfwheader);
601}
602
603#define MRVDRV_MIN_PKT_LEN 30
604
605static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
606 struct if_usb_card *cardp,
607 struct lbs_private *priv)
608{
609 if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
610 || recvlength < MRVDRV_MIN_PKT_LEN) {
611 lbs_deb_usbd(&cardp->udev->dev, "Packet length is Invalid\n");
612 kfree_skb(skb);
613 return;
614 }
615
616 skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
617 skb_put(skb, recvlength);
618 skb_pull(skb, MESSAGE_HEADER_LEN);
619
620 lbs_process_rxed_packet(priv, skb);
621}
622
623static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
624 struct sk_buff *skb,
625 struct if_usb_card *cardp,
626 struct lbs_private *priv)
627{
628 u8 i;
629
630 if (recvlength > LBS_CMD_BUFFER_SIZE) {
631 lbs_deb_usbd(&cardp->udev->dev,
632 "The receive buffer is too large\n");
633 kfree_skb(skb);
634 return;
635 }
636
637 BUG_ON(!in_interrupt());
638
639 spin_lock(&priv->driver_lock);
640
641 i = (priv->resp_idx == 0) ? 1 : 0;
642 BUG_ON(priv->resp_len[i]);
643 priv->resp_len[i] = (recvlength - MESSAGE_HEADER_LEN);
644 memcpy(priv->resp_buf[i], recvbuff + MESSAGE_HEADER_LEN,
645 priv->resp_len[i]);
646 kfree_skb(skb);
647 lbs_notify_command_response(priv, i);
648
649 spin_unlock(&priv->driver_lock);
650
651 lbs_deb_usbd(&cardp->udev->dev,
652 "Wake up main thread to handle cmd response\n");
653}
654
655/**
656 * if_usb_receive - read the packet into the upload buffer,
657 * wake up the main thread and initialise the Rx callack
658 *
659 * @urb: pointer to &struct urb
660 * returns: N/A
661 */
662static void if_usb_receive(struct urb *urb)
663{
664 struct if_usb_card *cardp = urb->context;
665 struct sk_buff *skb = cardp->rx_skb;
666 struct lbs_private *priv = cardp->priv;
667 int recvlength = urb->actual_length;
668 uint8_t *recvbuff = NULL;
669 uint32_t recvtype = 0;
670 __le32 *pkt = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
671 uint32_t event;
672
673 lbs_deb_enter(LBS_DEB_USB);
674
675 if (recvlength) {
676 if (urb->status) {
677 lbs_deb_usbd(&cardp->udev->dev, "RX URB failed: %d\n",
678 urb->status);
679 kfree_skb(skb);
680 goto setup_for_next;
681 }
682
683 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
684 recvtype = le32_to_cpu(pkt[0]);
685 lbs_deb_usbd(&cardp->udev->dev,
686 "Recv length = 0x%x, Recv type = 0x%X\n",
687 recvlength, recvtype);
688 } else if (urb->status) {
689 kfree_skb(skb);
690 goto rx_exit;
691 }
692
693 switch (recvtype) {
694 case CMD_TYPE_DATA:
695 process_cmdtypedata(recvlength, skb, cardp, priv);
696 break;
697
698 case CMD_TYPE_REQUEST:
699 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
700 break;
701
702 case CMD_TYPE_INDICATION:
703 /* Event handling */
704 event = le32_to_cpu(pkt[1]);
705 lbs_deb_usbd(&cardp->udev->dev, "**EVENT** 0x%X\n", event);
706 kfree_skb(skb);
707
708 /* Icky undocumented magic special case */
709 if (event & 0xffff0000) {
710 u32 trycount = (event & 0xffff0000) >> 16;
711
712 lbs_send_tx_feedback(priv, trycount);
713 } else
714 lbs_queue_event(priv, event & 0xFF);
715 break;
716
717 default:
718 lbs_deb_usbd(&cardp->udev->dev, "Unknown command type 0x%X\n",
719 recvtype);
720 kfree_skb(skb);
721 break;
722 }
723
724setup_for_next:
725 if_usb_submit_rx_urb(cardp);
726rx_exit:
727 lbs_deb_leave(LBS_DEB_USB);
728}
729
730/**
731 * if_usb_host_to_card - downloads data to FW
732 * @priv: pointer to &struct lbs_private structure
733 * @type: type of data
734 * @payload: pointer to data buffer
735 * @nb: number of bytes
736 * returns: 0 for success or negative error code
737 */
738static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
739 uint8_t *payload, uint16_t nb)
740{
741 struct if_usb_card *cardp = priv->card;
742
743 lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
744 lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
745
746 if (type == MVMS_CMD) {
747 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
748 priv->dnld_sent = DNLD_CMD_SENT;
749 } else {
750 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
751 priv->dnld_sent = DNLD_DATA_SENT;
752 }
753
754 memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
755
756 return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN);
757}
758
759/**
760 * if_usb_issue_boot_command - issues Boot command to the Boot2 code
761 * @cardp: pointer to &if_usb_card
762 * @ivalue: 1:Boot from FW by USB-Download
763 * 2:Boot from FW in EEPROM
764 * returns: 0 for success or negative error code
765 */
766static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
767{
768 struct bootcmd *bootcmd = cardp->ep_out_buf;
769
770 /* Prepare command */
771 bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
772 bootcmd->cmd = ivalue;
773 memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
774
775 /* Issue command */
776 usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd));
777
778 return 0;
779}
780
781
782/**
783 * check_fwfile_format - check the validity of Boot2/FW image
784 *
785 * @data: pointer to image
786 * @totlen: image length
787 * returns: 0 (good) or 1 (failure)
788 */
789static int check_fwfile_format(const uint8_t *data, uint32_t totlen)
790{
791 uint32_t bincmd, exit;
792 uint32_t blksize, offset, len;
793 int ret;
794
795 ret = 1;
796 exit = len = 0;
797
798 do {
799 struct fwheader *fwh = (void *)data;
800
801 bincmd = le32_to_cpu(fwh->dnldcmd);
802 blksize = le32_to_cpu(fwh->datalength);
803 switch (bincmd) {
804 case FW_HAS_DATA_TO_RECV:
805 offset = sizeof(struct fwheader) + blksize;
806 data += offset;
807 len += offset;
808 if (len >= totlen)
809 exit = 1;
810 break;
811 case FW_HAS_LAST_BLOCK:
812 exit = 1;
813 ret = 0;
814 break;
815 default:
816 exit = 1;
817 break;
818 }
819 } while (!exit);
820
821 if (ret)
822 pr_err("firmware file format check FAIL\n");
823 else
824 lbs_deb_fw("firmware file format check PASS\n");
825
826 return ret;
827}
828
829static void if_usb_prog_firmware(struct lbs_private *priv, int ret,
830 const struct firmware *fw,
831 const struct firmware *unused)
832{
833 struct if_usb_card *cardp = priv->card;
834 int i = 0;
835 static int reset_count = 10;
836
837 lbs_deb_enter(LBS_DEB_USB);
838
839 if (ret) {
840 pr_err("failed to find firmware (%d)\n", ret);
841 goto done;
842 }
843
844 cardp->fw = fw;
845 if (check_fwfile_format(cardp->fw->data, cardp->fw->size)) {
846 ret = -EINVAL;
847 goto done;
848 }
849
850 /* Cancel any pending usb business */
851 usb_kill_urb(cardp->rx_urb);
852 usb_kill_urb(cardp->tx_urb);
853
854 cardp->fwlastblksent = 0;
855 cardp->fwdnldover = 0;
856 cardp->totalbytes = 0;
857 cardp->fwfinalblk = 0;
858 cardp->bootcmdresp = 0;
859
860restart:
861 if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
862 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
863 ret = -EIO;
864 goto done;
865 }
866
867 cardp->bootcmdresp = 0;
868 do {
869 int j = 0;
870 i++;
871 if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
872 /* wait for command response */
873 do {
874 j++;
875 msleep_interruptible(100);
876 } while (cardp->bootcmdresp == 0 && j < 10);
877 } while (cardp->bootcmdresp == 0 && i < 5);
878
879 if (cardp->bootcmdresp == BOOT_CMD_RESP_NOT_SUPPORTED) {
880 /* Return to normal operation */
881 ret = -EOPNOTSUPP;
882 usb_kill_urb(cardp->rx_urb);
883 usb_kill_urb(cardp->tx_urb);
884 if (if_usb_submit_rx_urb(cardp) < 0)
885 ret = -EIO;
886 goto done;
887 } else if (cardp->bootcmdresp <= 0) {
888 if (--reset_count >= 0) {
889 if_usb_reset_device(cardp);
890 goto restart;
891 }
892 ret = -EIO;
893 goto done;
894 }
895
896 i = 0;
897
898 cardp->totalbytes = 0;
899 cardp->fwlastblksent = 0;
900 cardp->CRC_OK = 1;
901 cardp->fwdnldover = 0;
902 cardp->fwseqnum = -1;
903 cardp->totalbytes = 0;
904 cardp->fwfinalblk = 0;
905
906 /* Send the first firmware packet... */
907 if_usb_send_fw_pkt(cardp);
908
909 /* ... and wait for the process to complete */
910 wait_event_interruptible(cardp->fw_wq, cardp->surprise_removed || cardp->fwdnldover);
911
912 del_timer_sync(&cardp->fw_timeout);
913 usb_kill_urb(cardp->rx_urb);
914
915 if (!cardp->fwdnldover) {
916 pr_info("failed to load fw, resetting device!\n");
917 if (--reset_count >= 0) {
918 if_usb_reset_device(cardp);
919 goto restart;
920 }
921
922 pr_info("FW download failure, time = %d ms\n", i * 100);
923 ret = -EIO;
924 goto done;
925 }
926
927 cardp->priv->fw_ready = 1;
928 if_usb_submit_rx_urb(cardp);
929
930 if (lbs_start_card(priv))
931 goto done;
932
933 if_usb_setup_firmware(priv);
934
935 /*
936 * EHS_REMOVE_WAKEUP is not supported on all versions of the firmware.
937 */
938 priv->wol_criteria = EHS_REMOVE_WAKEUP;
939 if (lbs_host_sleep_cfg(priv, priv->wol_criteria, NULL))
940 priv->ehs_remove_supported = false;
941
942 done:
943 cardp->fw = NULL;
944 lbs_deb_leave(LBS_DEB_USB);
945}
946
947
948#ifdef CONFIG_PM
949static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
950{
951 struct if_usb_card *cardp = usb_get_intfdata(intf);
952 struct lbs_private *priv = cardp->priv;
953 int ret;
954
955 lbs_deb_enter(LBS_DEB_USB);
956
957 if (priv->psstate != PS_STATE_FULL_POWER) {
958 ret = -1;
959 goto out;
960 }
961
962#ifdef CONFIG_OLPC
963 if (machine_is_olpc()) {
964 if (priv->wol_criteria == EHS_REMOVE_WAKEUP)
965 olpc_ec_wakeup_clear(EC_SCI_SRC_WLAN);
966 else
967 olpc_ec_wakeup_set(EC_SCI_SRC_WLAN);
968 }
969#endif
970
971 ret = lbs_suspend(priv);
972 if (ret)
973 goto out;
974
975 /* Unlink tx & rx urb */
976 usb_kill_urb(cardp->tx_urb);
977 usb_kill_urb(cardp->rx_urb);
978
979 out:
980 lbs_deb_leave(LBS_DEB_USB);
981 return ret;
982}
983
984static int if_usb_resume(struct usb_interface *intf)
985{
986 struct if_usb_card *cardp = usb_get_intfdata(intf);
987 struct lbs_private *priv = cardp->priv;
988
989 lbs_deb_enter(LBS_DEB_USB);
990
991 if_usb_submit_rx_urb(cardp);
992
993 lbs_resume(priv);
994
995 lbs_deb_leave(LBS_DEB_USB);
996 return 0;
997}
998#else
999#define if_usb_suspend NULL
1000#define if_usb_resume NULL
1001#endif
1002
1003static struct usb_driver if_usb_driver = {
1004 .name = DRV_NAME,
1005 .probe = if_usb_probe,
1006 .disconnect = if_usb_disconnect,
1007 .id_table = if_usb_table,
1008 .suspend = if_usb_suspend,
1009 .resume = if_usb_resume,
1010 .reset_resume = if_usb_resume,
1011 .disable_hub_initiated_lpm = 1,
1012};
1013
1014module_usb_driver(if_usb_driver);
1015
1016MODULE_DESCRIPTION("8388 USB WLAN Driver");
1017MODULE_AUTHOR("Marvell International Ltd. and Red Hat, Inc.");
1018MODULE_LICENSE("GPL");