1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2021 pureLiFi
4 */
5
6 #include <linux/kernel.h>
7 #include <linux/init.h>
8 #include <linux/device.h>
9 #include <linux/errno.h>
10 #include <linux/slab.h>
11 #include <linux/skbuff.h>
12 #include <linux/usb.h>
13 #include <linux/workqueue.h>
14 #include <linux/proc_fs.h>
15 #include <linux/fs.h>
16 #include <linux/string.h>
17 #include <linux/module.h>
18 #include <net/mac80211.h>
19 #include <asm/unaligned.h>
20 #include <linux/sysfs.h>
21
22 #include "mac.h"
23 #include "usb.h"
24 #include "chip.h"
25
26 static const struct usb_device_id usb_ids[] = {
27 { USB_DEVICE(PURELIFI_X_VENDOR_ID_0, PURELIFI_X_PRODUCT_ID_0),
28 .driver_info = DEVICE_LIFI_X },
29 { USB_DEVICE(PURELIFI_XC_VENDOR_ID_0, PURELIFI_XC_PRODUCT_ID_0),
30 .driver_info = DEVICE_LIFI_XC },
31 { USB_DEVICE(PURELIFI_XL_VENDOR_ID_0, PURELIFI_XL_PRODUCT_ID_0),
32 .driver_info = DEVICE_LIFI_XL },
33 {}
34 };
35
plfxlc_send_packet_from_data_queue(struct plfxlc_usb * usb)36 void plfxlc_send_packet_from_data_queue(struct plfxlc_usb *usb)
37 {
38 struct plfxlc_usb_tx *tx = &usb->tx;
39 struct sk_buff *skb = NULL;
40 unsigned long flags;
41 u8 last_served_sidx;
42
43 spin_lock_irqsave(&tx->lock, flags);
44 last_served_sidx = usb->sidx;
45 do {
46 usb->sidx = (usb->sidx + 1) % MAX_STA_NUM;
47 if (!(tx->station[usb->sidx].flag & STATION_CONNECTED_FLAG))
48 continue;
49 if (!(tx->station[usb->sidx].flag & STATION_FIFO_FULL_FLAG))
50 skb = skb_peek(&tx->station[usb->sidx].data_list);
51 } while ((usb->sidx != last_served_sidx) && (!skb));
52
53 if (skb) {
54 skb = skb_dequeue(&tx->station[usb->sidx].data_list);
55 plfxlc_usb_wreq_async(usb, skb->data, skb->len, USB_REQ_DATA_TX,
56 plfxlc_tx_urb_complete, skb);
57 if (skb_queue_len(&tx->station[usb->sidx].data_list) <= 60)
58 ieee80211_wake_queues(plfxlc_usb_to_hw(usb));
59 }
60 spin_unlock_irqrestore(&tx->lock, flags);
61 }
62
handle_rx_packet(struct plfxlc_usb * usb,const u8 * buffer,unsigned int length)63 static void handle_rx_packet(struct plfxlc_usb *usb, const u8 *buffer,
64 unsigned int length)
65 {
66 plfxlc_mac_rx(plfxlc_usb_to_hw(usb), buffer, length);
67 }
68
rx_urb_complete(struct urb * urb)69 static void rx_urb_complete(struct urb *urb)
70 {
71 struct plfxlc_usb_tx *tx;
72 struct plfxlc_usb *usb;
73 unsigned int length;
74 const u8 *buffer;
75 u16 status;
76 u8 sidx;
77 int r;
78
79 if (!urb) {
80 pr_err("urb is NULL\n");
81 return;
82 }
83 if (!urb->context) {
84 pr_err("urb ctx is NULL\n");
85 return;
86 }
87 usb = urb->context;
88
89 if (usb->initialized != 1) {
90 pr_err("usb is not initialized\n");
91 return;
92 }
93
94 tx = &usb->tx;
95 switch (urb->status) {
96 case 0:
97 break;
98 case -ESHUTDOWN:
99 case -EINVAL:
100 case -ENODEV:
101 case -ENOENT:
102 case -ECONNRESET:
103 case -EPIPE:
104 dev_dbg(plfxlc_urb_dev(urb), "urb %p error %d\n", urb, urb->status);
105 return;
106 default:
107 dev_dbg(plfxlc_urb_dev(urb), "urb %p error %d\n", urb, urb->status);
108 if (tx->submitted_urbs++ < PURELIFI_URB_RETRY_MAX) {
109 dev_dbg(plfxlc_urb_dev(urb), "urb %p resubmit %d", urb,
110 tx->submitted_urbs++);
111 goto resubmit;
112 } else {
113 dev_dbg(plfxlc_urb_dev(urb), "urb %p max resubmits reached", urb);
114 tx->submitted_urbs = 0;
115 return;
116 }
117 }
118
119 buffer = urb->transfer_buffer;
120 length = le32_to_cpu(*(__le32 *)(buffer + sizeof(struct rx_status)))
121 + sizeof(u32);
122
123 if (urb->actual_length != (PLF_MSG_STATUS_OFFSET + 1)) {
124 if (usb->initialized && usb->link_up)
125 handle_rx_packet(usb, buffer, length);
126 goto resubmit;
127 }
128
129 status = buffer[PLF_MSG_STATUS_OFFSET];
130
131 switch (status) {
132 case STATION_FIFO_ALMOST_FULL_NOT_MESSAGE:
133 dev_dbg(&usb->intf->dev,
134 "FIFO full not packet receipt\n");
135 tx->mac_fifo_full = 1;
136 for (sidx = 0; sidx < MAX_STA_NUM; sidx++)
137 tx->station[sidx].flag |= STATION_FIFO_FULL_FLAG;
138 break;
139 case STATION_FIFO_ALMOST_FULL_MESSAGE:
140 dev_dbg(&usb->intf->dev, "FIFO full packet receipt\n");
141
142 for (sidx = 0; sidx < MAX_STA_NUM; sidx++)
143 tx->station[sidx].flag &= STATION_ACTIVE_FLAG;
144
145 plfxlc_send_packet_from_data_queue(usb);
146 break;
147 case STATION_CONNECT_MESSAGE:
148 usb->link_up = 1;
149 dev_dbg(&usb->intf->dev, "ST_CONNECT_MSG packet receipt\n");
150 break;
151 case STATION_DISCONNECT_MESSAGE:
152 usb->link_up = 0;
153 dev_dbg(&usb->intf->dev, "ST_DISCONN_MSG packet receipt\n");
154 break;
155 default:
156 dev_dbg(&usb->intf->dev, "Unknown packet receipt\n");
157 break;
158 }
159
160 resubmit:
161 r = usb_submit_urb(urb, GFP_ATOMIC);
162 if (r)
163 dev_dbg(plfxlc_urb_dev(urb), "urb %p resubmit fail (%d)\n", urb, r);
164 }
165
alloc_rx_urb(struct plfxlc_usb * usb)166 static struct urb *alloc_rx_urb(struct plfxlc_usb *usb)
167 {
168 struct usb_device *udev = plfxlc_usb_to_usbdev(usb);
169 struct urb *urb;
170 void *buffer;
171
172 urb = usb_alloc_urb(0, GFP_KERNEL);
173 if (!urb)
174 return NULL;
175
176 buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
177 &urb->transfer_dma);
178 if (!buffer) {
179 usb_free_urb(urb);
180 return NULL;
181 }
182
183 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
184 buffer, USB_MAX_RX_SIZE,
185 rx_urb_complete, usb);
186 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
187
188 return urb;
189 }
190
free_rx_urb(struct urb * urb)191 static void free_rx_urb(struct urb *urb)
192 {
193 if (!urb)
194 return;
195 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
196 urb->transfer_buffer, urb->transfer_dma);
197 usb_free_urb(urb);
198 }
199
__lf_x_usb_enable_rx(struct plfxlc_usb * usb)200 static int __lf_x_usb_enable_rx(struct plfxlc_usb *usb)
201 {
202 struct plfxlc_usb_rx *rx = &usb->rx;
203 struct urb **urbs;
204 int i, r;
205
206 r = -ENOMEM;
207 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
208 if (!urbs)
209 goto error;
210
211 for (i = 0; i < RX_URBS_COUNT; i++) {
212 urbs[i] = alloc_rx_urb(usb);
213 if (!urbs[i])
214 goto error;
215 }
216
217 spin_lock_irq(&rx->lock);
218
219 dev_dbg(plfxlc_usb_dev(usb), "irq_disabled %d\n", irqs_disabled());
220
221 if (rx->urbs) {
222 spin_unlock_irq(&rx->lock);
223 r = 0;
224 goto error;
225 }
226 rx->urbs = urbs;
227 rx->urbs_count = RX_URBS_COUNT;
228 spin_unlock_irq(&rx->lock);
229
230 for (i = 0; i < RX_URBS_COUNT; i++) {
231 r = usb_submit_urb(urbs[i], GFP_KERNEL);
232 if (r)
233 goto error_submit;
234 }
235
236 return 0;
237
238 error_submit:
239 for (i = 0; i < RX_URBS_COUNT; i++)
240 usb_kill_urb(urbs[i]);
241 spin_lock_irq(&rx->lock);
242 rx->urbs = NULL;
243 rx->urbs_count = 0;
244 spin_unlock_irq(&rx->lock);
245 error:
246 if (urbs) {
247 for (i = 0; i < RX_URBS_COUNT; i++)
248 free_rx_urb(urbs[i]);
249 }
250 return r;
251 }
252
plfxlc_usb_enable_rx(struct plfxlc_usb * usb)253 int plfxlc_usb_enable_rx(struct plfxlc_usb *usb)
254 {
255 struct plfxlc_usb_rx *rx = &usb->rx;
256 int r;
257
258 mutex_lock(&rx->setup_mutex);
259 r = __lf_x_usb_enable_rx(usb);
260 if (!r)
261 usb->rx_usb_enabled = 1;
262
263 mutex_unlock(&rx->setup_mutex);
264
265 return r;
266 }
267
__lf_x_usb_disable_rx(struct plfxlc_usb * usb)268 static void __lf_x_usb_disable_rx(struct plfxlc_usb *usb)
269 {
270 struct plfxlc_usb_rx *rx = &usb->rx;
271 unsigned long flags;
272 unsigned int count;
273 struct urb **urbs;
274 int i;
275
276 spin_lock_irqsave(&rx->lock, flags);
277 urbs = rx->urbs;
278 count = rx->urbs_count;
279 spin_unlock_irqrestore(&rx->lock, flags);
280
281 if (!urbs)
282 return;
283
284 for (i = 0; i < count; i++) {
285 usb_kill_urb(urbs[i]);
286 free_rx_urb(urbs[i]);
287 }
288 kfree(urbs);
289 rx->urbs = NULL;
290 rx->urbs_count = 0;
291 }
292
plfxlc_usb_disable_rx(struct plfxlc_usb * usb)293 void plfxlc_usb_disable_rx(struct plfxlc_usb *usb)
294 {
295 struct plfxlc_usb_rx *rx = &usb->rx;
296
297 mutex_lock(&rx->setup_mutex);
298 __lf_x_usb_disable_rx(usb);
299 usb->rx_usb_enabled = 0;
300 mutex_unlock(&rx->setup_mutex);
301 }
302
plfxlc_usb_disable_tx(struct plfxlc_usb * usb)303 void plfxlc_usb_disable_tx(struct plfxlc_usb *usb)
304 {
305 struct plfxlc_usb_tx *tx = &usb->tx;
306 unsigned long flags;
307
308 clear_bit(PLF_BIT_ENABLED, &tx->enabled);
309
310 /* kill all submitted tx-urbs */
311 usb_kill_anchored_urbs(&tx->submitted);
312
313 spin_lock_irqsave(&tx->lock, flags);
314 WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
315 WARN_ON(tx->submitted_urbs != 0);
316 tx->submitted_urbs = 0;
317 spin_unlock_irqrestore(&tx->lock, flags);
318
319 /* The stopped state is ignored, relying on ieee80211_wake_queues()
320 * in a potentionally following plfxlc_usb_enable_tx().
321 */
322 }
323
plfxlc_usb_enable_tx(struct plfxlc_usb * usb)324 void plfxlc_usb_enable_tx(struct plfxlc_usb *usb)
325 {
326 struct plfxlc_usb_tx *tx = &usb->tx;
327 unsigned long flags;
328
329 spin_lock_irqsave(&tx->lock, flags);
330 set_bit(PLF_BIT_ENABLED, &tx->enabled);
331 tx->submitted_urbs = 0;
332 ieee80211_wake_queues(plfxlc_usb_to_hw(usb));
333 tx->stopped = 0;
334 spin_unlock_irqrestore(&tx->lock, flags);
335 }
336
plfxlc_tx_urb_complete(struct urb * urb)337 void plfxlc_tx_urb_complete(struct urb *urb)
338 {
339 struct ieee80211_tx_info *info;
340 struct plfxlc_usb *usb;
341 struct sk_buff *skb;
342
343 skb = urb->context;
344 info = IEEE80211_SKB_CB(skb);
345 /* grab 'usb' pointer before handing off the skb (since
346 * it might be freed by plfxlc_mac_tx_to_dev or mac80211)
347 */
348 usb = &plfxlc_hw_mac(info->rate_driver_data[0])->chip.usb;
349
350 switch (urb->status) {
351 case 0:
352 break;
353 case -ESHUTDOWN:
354 case -EINVAL:
355 case -ENODEV:
356 case -ENOENT:
357 case -ECONNRESET:
358 case -EPIPE:
359 dev_dbg(plfxlc_urb_dev(urb), "urb %p error %d\n", urb, urb->status);
360 break;
361 default:
362 dev_dbg(plfxlc_urb_dev(urb), "urb %p error %d\n", urb, urb->status);
363 return;
364 }
365
366 plfxlc_mac_tx_to_dev(skb, urb->status);
367 plfxlc_send_packet_from_data_queue(usb);
368 usb_free_urb(urb);
369 }
370
init_usb_rx(struct plfxlc_usb * usb)371 static inline void init_usb_rx(struct plfxlc_usb *usb)
372 {
373 struct plfxlc_usb_rx *rx = &usb->rx;
374
375 spin_lock_init(&rx->lock);
376 mutex_init(&rx->setup_mutex);
377
378 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH)
379 rx->usb_packet_size = 512;
380 else
381 rx->usb_packet_size = 64;
382
383 if (rx->fragment_length != 0)
384 dev_dbg(plfxlc_usb_dev(usb), "fragment_length error\n");
385 }
386
init_usb_tx(struct plfxlc_usb * usb)387 static inline void init_usb_tx(struct plfxlc_usb *usb)
388 {
389 struct plfxlc_usb_tx *tx = &usb->tx;
390
391 spin_lock_init(&tx->lock);
392 clear_bit(PLF_BIT_ENABLED, &tx->enabled);
393 tx->stopped = 0;
394 skb_queue_head_init(&tx->submitted_skbs);
395 init_usb_anchor(&tx->submitted);
396 }
397
plfxlc_usb_init(struct plfxlc_usb * usb,struct ieee80211_hw * hw,struct usb_interface * intf)398 void plfxlc_usb_init(struct plfxlc_usb *usb, struct ieee80211_hw *hw,
399 struct usb_interface *intf)
400 {
401 memset(usb, 0, sizeof(*usb));
402 usb->intf = usb_get_intf(intf);
403 usb_set_intfdata(usb->intf, hw);
404 init_usb_tx(usb);
405 init_usb_rx(usb);
406 }
407
plfxlc_usb_release(struct plfxlc_usb * usb)408 void plfxlc_usb_release(struct plfxlc_usb *usb)
409 {
410 plfxlc_op_stop(plfxlc_usb_to_hw(usb));
411 plfxlc_usb_disable_tx(usb);
412 plfxlc_usb_disable_rx(usb);
413 usb_set_intfdata(usb->intf, NULL);
414 usb_put_intf(usb->intf);
415 }
416
plfxlc_speed(enum usb_device_speed speed)417 const char *plfxlc_speed(enum usb_device_speed speed)
418 {
419 switch (speed) {
420 case USB_SPEED_LOW:
421 return "low";
422 case USB_SPEED_FULL:
423 return "full";
424 case USB_SPEED_HIGH:
425 return "high";
426 default:
427 return "unknown";
428 }
429 }
430
plfxlc_usb_init_hw(struct plfxlc_usb * usb)431 int plfxlc_usb_init_hw(struct plfxlc_usb *usb)
432 {
433 int r;
434
435 r = usb_reset_configuration(plfxlc_usb_to_usbdev(usb));
436 if (r) {
437 dev_err(plfxlc_usb_dev(usb), "cfg reset failed (%d)\n", r);
438 return r;
439 }
440 return 0;
441 }
442
get_usb_req(struct usb_device * udev,void * buffer,u32 buffer_len,enum plf_usb_req_enum usb_req_id,struct plf_usb_req * usb_req)443 static void get_usb_req(struct usb_device *udev, void *buffer,
444 u32 buffer_len, enum plf_usb_req_enum usb_req_id,
445 struct plf_usb_req *usb_req)
446 {
447 __be32 payload_len_nw = cpu_to_be32(buffer_len + FCS_LEN);
448 const u8 *buffer_src_p = buffer;
449 u8 *buffer_dst = usb_req->buf;
450 u32 temp_usb_len = 0;
451
452 usb_req->id = cpu_to_be32(usb_req_id);
453 usb_req->len = cpu_to_be32(0);
454
455 /* Copy buffer length into the transmitted buffer, as it is important
456 * for the Rx MAC to know its exact length.
457 */
458 if (usb_req->id == cpu_to_be32(USB_REQ_BEACON_WR)) {
459 memcpy(buffer_dst, &payload_len_nw, sizeof(payload_len_nw));
460 buffer_dst += sizeof(payload_len_nw);
461 temp_usb_len += sizeof(payload_len_nw);
462 }
463
464 memcpy(buffer_dst, buffer_src_p, buffer_len);
465 buffer_dst += buffer_len;
466 buffer_src_p += buffer_len;
467 temp_usb_len += buffer_len;
468
469 /* Set the FCS_LEN (4) bytes as 0 for CRC checking. */
470 memset(buffer_dst, 0, FCS_LEN);
471 buffer_dst += FCS_LEN;
472 temp_usb_len += FCS_LEN;
473
474 /* Round the packet to be transmitted to 4 bytes. */
475 if (temp_usb_len % PURELIFI_BYTE_NUM_ALIGNMENT) {
476 memset(buffer_dst, 0, PURELIFI_BYTE_NUM_ALIGNMENT -
477 (temp_usb_len %
478 PURELIFI_BYTE_NUM_ALIGNMENT));
479 buffer_dst += PURELIFI_BYTE_NUM_ALIGNMENT -
480 (temp_usb_len %
481 PURELIFI_BYTE_NUM_ALIGNMENT);
482 temp_usb_len += PURELIFI_BYTE_NUM_ALIGNMENT -
483 (temp_usb_len % PURELIFI_BYTE_NUM_ALIGNMENT);
484 }
485
486 usb_req->len = cpu_to_be32(temp_usb_len);
487 }
488
plfxlc_usb_wreq_async(struct plfxlc_usb * usb,const u8 * buffer,int buffer_len,enum plf_usb_req_enum usb_req_id,usb_complete_t complete_fn,void * context)489 int plfxlc_usb_wreq_async(struct plfxlc_usb *usb, const u8 *buffer,
490 int buffer_len, enum plf_usb_req_enum usb_req_id,
491 usb_complete_t complete_fn,
492 void *context)
493 {
494 struct usb_device *udev = interface_to_usbdev(usb->ez_usb);
495 struct urb *urb = usb_alloc_urb(0, GFP_ATOMIC);
496 int r;
497
498 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
499 (void *)buffer, buffer_len, complete_fn, context);
500
501 r = usb_submit_urb(urb, GFP_ATOMIC);
502 if (r)
503 dev_err(&udev->dev, "Async write submit failed (%d)\n", r);
504
505 return r;
506 }
507
plfxlc_usb_wreq(struct usb_interface * ez_usb,void * buffer,int buffer_len,enum plf_usb_req_enum usb_req_id)508 int plfxlc_usb_wreq(struct usb_interface *ez_usb, void *buffer, int buffer_len,
509 enum plf_usb_req_enum usb_req_id)
510 {
511 struct usb_device *udev = interface_to_usbdev(ez_usb);
512 unsigned char *dma_buffer = NULL;
513 struct plf_usb_req usb_req;
514 int usb_bulk_msg_len;
515 int actual_length;
516 int r;
517
518 get_usb_req(udev, buffer, buffer_len, usb_req_id, &usb_req);
519 usb_bulk_msg_len = sizeof(__le32) + sizeof(__le32) +
520 be32_to_cpu(usb_req.len);
521
522 dma_buffer = kmemdup(&usb_req, usb_bulk_msg_len, GFP_KERNEL);
523
524 if (!dma_buffer) {
525 r = -ENOMEM;
526 goto error;
527 }
528
529 r = usb_bulk_msg(udev,
530 usb_sndbulkpipe(udev, EP_DATA_OUT),
531 dma_buffer, usb_bulk_msg_len,
532 &actual_length, USB_BULK_MSG_TIMEOUT_MS);
533 kfree(dma_buffer);
534 error:
535 if (r) {
536 r = -ENOMEM;
537 dev_err(&udev->dev, "usb_bulk_msg failed (%d)\n", r);
538 }
539
540 return r;
541 }
542
slif_data_plane_sap_timer_callb(struct timer_list * t)543 static void slif_data_plane_sap_timer_callb(struct timer_list *t)
544 {
545 struct plfxlc_usb *usb = from_timer(usb, t, tx.tx_retry_timer);
546
547 plfxlc_send_packet_from_data_queue(usb);
548 timer_setup(&usb->tx.tx_retry_timer,
549 slif_data_plane_sap_timer_callb, 0);
550 mod_timer(&usb->tx.tx_retry_timer, jiffies + TX_RETRY_BACKOFF_JIFF);
551 }
552
sta_queue_cleanup_timer_callb(struct timer_list * t)553 static void sta_queue_cleanup_timer_callb(struct timer_list *t)
554 {
555 struct plfxlc_usb *usb = from_timer(usb, t, sta_queue_cleanup);
556 struct plfxlc_usb_tx *tx = &usb->tx;
557 int sidx;
558
559 for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) {
560 if (!(tx->station[sidx].flag & STATION_CONNECTED_FLAG))
561 continue;
562 if (tx->station[sidx].flag & STATION_HEARTBEAT_FLAG) {
563 tx->station[sidx].flag ^= STATION_HEARTBEAT_FLAG;
564 } else {
565 memset(tx->station[sidx].mac, 0, ETH_ALEN);
566 tx->station[sidx].flag = 0;
567 }
568 }
569 timer_setup(&usb->sta_queue_cleanup,
570 sta_queue_cleanup_timer_callb, 0);
571 mod_timer(&usb->sta_queue_cleanup, jiffies + STA_QUEUE_CLEANUP_JIFF);
572 }
573
probe(struct usb_interface * intf,const struct usb_device_id * id)574 static int probe(struct usb_interface *intf,
575 const struct usb_device_id *id)
576 {
577 u8 serial_number[PURELIFI_SERIAL_LEN];
578 struct ieee80211_hw *hw = NULL;
579 struct plfxlc_usb_tx *tx;
580 struct plfxlc_chip *chip;
581 struct plfxlc_usb *usb;
582 u8 hw_address[ETH_ALEN];
583 unsigned int i;
584 int r = 0;
585
586 hw = plfxlc_mac_alloc_hw(intf);
587
588 if (!hw) {
589 r = -ENOMEM;
590 goto error;
591 }
592
593 chip = &plfxlc_hw_mac(hw)->chip;
594 usb = &chip->usb;
595 usb->ez_usb = intf;
596 tx = &usb->tx;
597
598 r = plfxlc_upload_mac_and_serial(intf, hw_address, serial_number);
599 if (r) {
600 dev_err(&intf->dev, "MAC and Serial upload failed (%d)\n", r);
601 goto error;
602 }
603
604 chip->unit_type = STA;
605 dev_err(&intf->dev, "Unit type is station");
606
607 r = plfxlc_mac_preinit_hw(hw, hw_address);
608 if (r) {
609 dev_err(&intf->dev, "Init mac failed (%d)\n", r);
610 goto error;
611 }
612
613 r = ieee80211_register_hw(hw);
614 if (r) {
615 dev_err(&intf->dev, "Register device failed (%d)\n", r);
616 goto error;
617 }
618
619 if ((le16_to_cpu(interface_to_usbdev(intf)->descriptor.idVendor) ==
620 PURELIFI_XL_VENDOR_ID_0) &&
621 (le16_to_cpu(interface_to_usbdev(intf)->descriptor.idProduct) ==
622 PURELIFI_XL_PRODUCT_ID_0)) {
623 r = plfxlc_download_xl_firmware(intf);
624 } else {
625 r = plfxlc_download_fpga(intf);
626 }
627 if (r != 0) {
628 dev_err(&intf->dev, "FPGA download failed (%d)\n", r);
629 goto error;
630 }
631
632 tx->mac_fifo_full = 0;
633 spin_lock_init(&tx->lock);
634
635 msleep(PLF_MSLEEP_TIME);
636 r = plfxlc_usb_init_hw(usb);
637 if (r < 0) {
638 dev_err(&intf->dev, "usb_init_hw failed (%d)\n", r);
639 goto error;
640 }
641
642 msleep(PLF_MSLEEP_TIME);
643 r = plfxlc_chip_switch_radio(chip, PLFXLC_RADIO_ON);
644 if (r < 0) {
645 dev_dbg(&intf->dev, "chip_switch_radio_on failed (%d)\n", r);
646 goto error;
647 }
648
649 msleep(PLF_MSLEEP_TIME);
650 r = plfxlc_chip_set_rate(chip, 8);
651 if (r < 0) {
652 dev_dbg(&intf->dev, "chip_set_rate failed (%d)\n", r);
653 goto error;
654 }
655
656 msleep(PLF_MSLEEP_TIME);
657 r = plfxlc_usb_wreq(usb->ez_usb,
658 hw_address, ETH_ALEN, USB_REQ_MAC_WR);
659 if (r < 0) {
660 dev_dbg(&intf->dev, "MAC_WR failure (%d)\n", r);
661 goto error;
662 }
663
664 plfxlc_chip_enable_rxtx(chip);
665
666 /* Initialise the data plane Tx queue */
667 for (i = 0; i < MAX_STA_NUM; i++) {
668 skb_queue_head_init(&tx->station[i].data_list);
669 tx->station[i].flag = 0;
670 }
671
672 tx->station[STA_BROADCAST_INDEX].flag |= STATION_CONNECTED_FLAG;
673 for (i = 0; i < ETH_ALEN; i++)
674 tx->station[STA_BROADCAST_INDEX].mac[i] = 0xFF;
675
676 timer_setup(&tx->tx_retry_timer, slif_data_plane_sap_timer_callb, 0);
677 tx->tx_retry_timer.expires = jiffies + TX_RETRY_BACKOFF_JIFF;
678 add_timer(&tx->tx_retry_timer);
679
680 timer_setup(&usb->sta_queue_cleanup,
681 sta_queue_cleanup_timer_callb, 0);
682 usb->sta_queue_cleanup.expires = jiffies + STA_QUEUE_CLEANUP_JIFF;
683 add_timer(&usb->sta_queue_cleanup);
684
685 plfxlc_mac_init_hw(hw);
686 usb->initialized = true;
687 return 0;
688 error:
689 if (hw) {
690 plfxlc_mac_release(plfxlc_hw_mac(hw));
691 ieee80211_unregister_hw(hw);
692 ieee80211_free_hw(hw);
693 }
694 dev_err(&intf->dev, "pureLifi:Device error");
695 return r;
696 }
697
disconnect(struct usb_interface * intf)698 static void disconnect(struct usb_interface *intf)
699 {
700 struct ieee80211_hw *hw = plfxlc_intf_to_hw(intf);
701 struct plfxlc_mac *mac;
702 struct plfxlc_usb *usb;
703
704 /* Either something really bad happened, or
705 * we're just dealing with a DEVICE_INSTALLER.
706 */
707 if (!hw)
708 return;
709
710 mac = plfxlc_hw_mac(hw);
711 usb = &mac->chip.usb;
712
713 del_timer_sync(&usb->tx.tx_retry_timer);
714 del_timer_sync(&usb->sta_queue_cleanup);
715
716 ieee80211_unregister_hw(hw);
717
718 plfxlc_chip_disable_rxtx(&mac->chip);
719
720 /* If the disconnect has been caused by a removal of the
721 * driver module, the reset allows reloading of the driver. If the
722 * reset will not be executed here, the upload of the firmware in the
723 * probe function caused by the reloading of the driver will fail.
724 */
725 usb_reset_device(interface_to_usbdev(intf));
726
727 plfxlc_mac_release(mac);
728 ieee80211_free_hw(hw);
729 }
730
plfxlc_usb_resume(struct plfxlc_usb * usb)731 static void plfxlc_usb_resume(struct plfxlc_usb *usb)
732 {
733 struct plfxlc_mac *mac = plfxlc_usb_to_mac(usb);
734 int r;
735
736 r = plfxlc_op_start(plfxlc_usb_to_hw(usb));
737 if (r < 0) {
738 dev_warn(plfxlc_usb_dev(usb),
739 "Device resume failed (%d)\n", r);
740
741 if (usb->was_running)
742 set_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
743
744 usb_queue_reset_device(usb->intf);
745 return;
746 }
747
748 if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
749 r = plfxlc_restore_settings(mac);
750 if (r < 0) {
751 dev_dbg(plfxlc_usb_dev(usb),
752 "Restore failed (%d)\n", r);
753 return;
754 }
755 }
756 }
757
plfxlc_usb_stop(struct plfxlc_usb * usb)758 static void plfxlc_usb_stop(struct plfxlc_usb *usb)
759 {
760 plfxlc_op_stop(plfxlc_usb_to_hw(usb));
761 plfxlc_usb_disable_tx(usb);
762 plfxlc_usb_disable_rx(usb);
763
764 usb->initialized = false;
765 }
766
pre_reset(struct usb_interface * intf)767 static int pre_reset(struct usb_interface *intf)
768 {
769 struct ieee80211_hw *hw = usb_get_intfdata(intf);
770 struct plfxlc_mac *mac;
771 struct plfxlc_usb *usb;
772
773 if (!hw || intf->condition != USB_INTERFACE_BOUND)
774 return 0;
775
776 mac = plfxlc_hw_mac(hw);
777 usb = &mac->chip.usb;
778
779 usb->was_running = test_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
780
781 plfxlc_usb_stop(usb);
782
783 return 0;
784 }
785
post_reset(struct usb_interface * intf)786 static int post_reset(struct usb_interface *intf)
787 {
788 struct ieee80211_hw *hw = usb_get_intfdata(intf);
789 struct plfxlc_mac *mac;
790 struct plfxlc_usb *usb;
791
792 if (!hw || intf->condition != USB_INTERFACE_BOUND)
793 return 0;
794
795 mac = plfxlc_hw_mac(hw);
796 usb = &mac->chip.usb;
797
798 if (usb->was_running)
799 plfxlc_usb_resume(usb);
800
801 return 0;
802 }
803
804 #ifdef CONFIG_PM
805
get_plfxlc_usb(struct usb_interface * intf)806 static struct plfxlc_usb *get_plfxlc_usb(struct usb_interface *intf)
807 {
808 struct ieee80211_hw *hw = plfxlc_intf_to_hw(intf);
809 struct plfxlc_mac *mac;
810
811 /* Either something really bad happened, or
812 * we're just dealing with a DEVICE_INSTALLER.
813 */
814 if (!hw)
815 return NULL;
816
817 mac = plfxlc_hw_mac(hw);
818 return &mac->chip.usb;
819 }
820
suspend(struct usb_interface * interface,pm_message_t message)821 static int suspend(struct usb_interface *interface,
822 pm_message_t message)
823 {
824 struct plfxlc_usb *pl = get_plfxlc_usb(interface);
825 struct plfxlc_mac *mac = plfxlc_usb_to_mac(pl);
826
827 if (!pl)
828 return -ENODEV;
829 if (pl->initialized == 0)
830 return 0;
831 pl->was_running = test_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
832 plfxlc_usb_stop(pl);
833 return 0;
834 }
835
resume(struct usb_interface * interface)836 static int resume(struct usb_interface *interface)
837 {
838 struct plfxlc_usb *pl = get_plfxlc_usb(interface);
839
840 if (!pl)
841 return -ENODEV;
842 if (pl->was_running)
843 plfxlc_usb_resume(pl);
844 return 0;
845 }
846
847 #endif
848
849 static struct usb_driver driver = {
850 .name = KBUILD_MODNAME,
851 .id_table = usb_ids,
852 .probe = probe,
853 .disconnect = disconnect,
854 .pre_reset = pre_reset,
855 .post_reset = post_reset,
856 #ifdef CONFIG_PM
857 .suspend = suspend,
858 .resume = resume,
859 #endif
860 .disable_hub_initiated_lpm = 1,
861 };
862
usb_init(void)863 static int __init usb_init(void)
864 {
865 int r;
866
867 r = usb_register(&driver);
868 if (r) {
869 pr_err("%s usb_register() failed %d\n", driver.name, r);
870 return r;
871 }
872
873 pr_debug("Driver initialized :%s\n", driver.name);
874 return 0;
875 }
876
usb_exit(void)877 static void __exit usb_exit(void)
878 {
879 usb_deregister(&driver);
880 pr_debug("%s %s\n", driver.name, __func__);
881 }
882
883 MODULE_LICENSE("GPL");
884 MODULE_DESCRIPTION("USB driver for pureLiFi devices");
885 MODULE_AUTHOR("pureLiFi");
886 MODULE_VERSION("1.0");
887 MODULE_FIRMWARE("plfxlc/lifi-x.bin");
888 MODULE_DEVICE_TABLE(usb, usb_ids);
889
890 module_init(usb_init);
891 module_exit(usb_exit);
892