1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 * usb_ops_linux.c
4 *
5 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
6 * Linux device driver for RTL8192SU
7 *
8 * Modifications for inclusion into the Linux staging tree are
9 * Copyright(c) 2010 Larry Finger. All rights reserved.
10 *
11 * Contact information:
12 * WLAN FAE <wlanfae@realtek.com>
13 * Larry Finger <Larry.Finger@lwfinger.net>
14 *
15 ******************************************************************************/
16
17 #define _HCI_OPS_OS_C_
18
19 #include <linux/usb.h>
20
21 #include "osdep_service.h"
22 #include "drv_types.h"
23 #include "osdep_intf.h"
24 #include "usb_ops.h"
25
26 #define RTL871X_VENQT_READ 0xc0
27 #define RTL871X_VENQT_WRITE 0x40
28
29 struct zero_bulkout_context {
30 void *pbuf;
31 void *purb;
32 void *pirp;
33 void *padapter;
34 };
35
r8712_usb_init_intf_priv(struct intf_priv * pintfpriv)36 uint r8712_usb_init_intf_priv(struct intf_priv *pintfpriv)
37 {
38 pintfpriv->piorw_urb = usb_alloc_urb(0, GFP_ATOMIC);
39 if (!pintfpriv->piorw_urb)
40 return _FAIL;
41 init_completion(&pintfpriv->io_retevt_comp);
42 return _SUCCESS;
43 }
44
r8712_usb_unload_intf_priv(struct intf_priv * pintfpriv)45 void r8712_usb_unload_intf_priv(struct intf_priv *pintfpriv)
46 {
47 if (pintfpriv->piorw_urb) {
48 usb_kill_urb(pintfpriv->piorw_urb);
49 usb_free_urb(pintfpriv->piorw_urb);
50 }
51 }
52
ffaddr2pipehdl(struct dvobj_priv * pdvobj,u32 addr)53 static unsigned int ffaddr2pipehdl(struct dvobj_priv *pdvobj, u32 addr)
54 {
55 unsigned int pipe = 0;
56 struct usb_device *pusbd = pdvobj->pusbdev;
57
58 if (pdvobj->nr_endpoint == 11) {
59 switch (addr) {
60 case RTL8712_DMA_BKQ:
61 pipe = usb_sndbulkpipe(pusbd, 0x07);
62 break;
63 case RTL8712_DMA_BEQ:
64 pipe = usb_sndbulkpipe(pusbd, 0x06);
65 break;
66 case RTL8712_DMA_VIQ:
67 pipe = usb_sndbulkpipe(pusbd, 0x05);
68 break;
69 case RTL8712_DMA_VOQ:
70 pipe = usb_sndbulkpipe(pusbd, 0x04);
71 break;
72 case RTL8712_DMA_BCNQ:
73 pipe = usb_sndbulkpipe(pusbd, 0x0a);
74 break;
75 case RTL8712_DMA_BMCQ: /* HI Queue */
76 pipe = usb_sndbulkpipe(pusbd, 0x0b);
77 break;
78 case RTL8712_DMA_MGTQ:
79 pipe = usb_sndbulkpipe(pusbd, 0x0c);
80 break;
81 case RTL8712_DMA_RX0FF:
82 pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
83 break;
84 case RTL8712_DMA_C2HCMD:
85 pipe = usb_rcvbulkpipe(pusbd, 0x09); /* in */
86 break;
87 case RTL8712_DMA_H2CCMD:
88 pipe = usb_sndbulkpipe(pusbd, 0x0d);
89 break;
90 }
91 } else if (pdvobj->nr_endpoint == 6) {
92 switch (addr) {
93 case RTL8712_DMA_BKQ:
94 pipe = usb_sndbulkpipe(pusbd, 0x07);
95 break;
96 case RTL8712_DMA_BEQ:
97 pipe = usb_sndbulkpipe(pusbd, 0x06);
98 break;
99 case RTL8712_DMA_VIQ:
100 pipe = usb_sndbulkpipe(pusbd, 0x05);
101 break;
102 case RTL8712_DMA_VOQ:
103 pipe = usb_sndbulkpipe(pusbd, 0x04);
104 break;
105 case RTL8712_DMA_RX0FF:
106 case RTL8712_DMA_C2HCMD:
107 pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
108 break;
109 case RTL8712_DMA_H2CCMD:
110 case RTL8712_DMA_BCNQ:
111 case RTL8712_DMA_BMCQ:
112 case RTL8712_DMA_MGTQ:
113 pipe = usb_sndbulkpipe(pusbd, 0x0d);
114 break;
115 }
116 } else if (pdvobj->nr_endpoint == 4) {
117 switch (addr) {
118 case RTL8712_DMA_BEQ:
119 pipe = usb_sndbulkpipe(pusbd, 0x06);
120 break;
121 case RTL8712_DMA_VOQ:
122 pipe = usb_sndbulkpipe(pusbd, 0x04);
123 break;
124 case RTL8712_DMA_RX0FF:
125 case RTL8712_DMA_C2HCMD:
126 pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
127 break;
128 case RTL8712_DMA_H2CCMD:
129 case RTL8712_DMA_BCNQ:
130 case RTL8712_DMA_BMCQ:
131 case RTL8712_DMA_MGTQ:
132 pipe = usb_sndbulkpipe(pusbd, 0x0d);
133 break;
134 }
135 } else {
136 pipe = 0;
137 }
138 return pipe;
139 }
140
usb_write_mem_complete(struct urb * purb)141 static void usb_write_mem_complete(struct urb *purb)
142 {
143 struct io_queue *pio_q = (struct io_queue *)purb->context;
144 struct intf_hdl *pintf = &(pio_q->intf);
145 struct intf_priv *pintfpriv = pintf->pintfpriv;
146 struct _adapter *padapter = (struct _adapter *)pintf->adapter;
147
148 if (purb->status != 0) {
149 if (purb->status == (-ESHUTDOWN))
150 padapter->driver_stopped = true;
151 else
152 padapter->surprise_removed = true;
153 }
154 complete(&pintfpriv->io_retevt_comp);
155 }
156
r8712_usb_write_mem(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * wmem)157 void r8712_usb_write_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
158 {
159 unsigned int pipe;
160 struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
161 struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
162 struct io_queue *pio_queue = padapter->pio_queue;
163 struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
164 struct usb_device *pusbd = pdvobj->pusbdev;
165 struct urb *piorw_urb = pintfpriv->piorw_urb;
166
167 if ((padapter->driver_stopped) || (padapter->surprise_removed) ||
168 (padapter->pwrctrlpriv.pnp_bstop_trx))
169 return;
170 /* translate DMA FIFO addr to pipehandle */
171 pipe = ffaddr2pipehdl(pdvobj, addr);
172 if (pipe == 0)
173 return;
174 usb_fill_bulk_urb(piorw_urb, pusbd, pipe,
175 wmem, cnt, usb_write_mem_complete,
176 pio_queue);
177 usb_submit_urb(piorw_urb, GFP_ATOMIC);
178 wait_for_completion_interruptible(&pintfpriv->io_retevt_comp);
179 }
180
r8712_usb_read_port_complete(struct urb * purb)181 static void r8712_usb_read_port_complete(struct urb *purb)
182 {
183 uint isevt;
184 __le32 *pbuf;
185 struct recv_buf *precvbuf = (struct recv_buf *)purb->context;
186 struct _adapter *padapter = (struct _adapter *)precvbuf->adapter;
187 struct recv_priv *precvpriv = &padapter->recvpriv;
188
189 if (padapter->surprise_removed || padapter->driver_stopped)
190 return;
191 if (purb->status == 0) { /* SUCCESS */
192 if ((purb->actual_length > (MAX_RECVBUF_SZ)) ||
193 (purb->actual_length < RXDESC_SIZE)) {
194 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
195 (unsigned char *)precvbuf);
196 } else {
197 _pkt *pskb = precvbuf->pskb;
198
199 precvbuf->transfer_len = purb->actual_length;
200 pbuf = (__le32 *)precvbuf->pbuf;
201 isevt = le32_to_cpu(*(pbuf + 1)) & 0x1ff;
202 if ((isevt & 0x1ff) == 0x1ff) {
203 r8712_rxcmd_event_hdl(padapter, pbuf);
204 skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
205 r8712_read_port(padapter, precvpriv->ff_hwaddr,
206 0, (unsigned char *)precvbuf);
207 } else {
208 skb_put(pskb, purb->actual_length);
209 skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
210 tasklet_hi_schedule(&precvpriv->recv_tasklet);
211 r8712_read_port(padapter, precvpriv->ff_hwaddr,
212 0, (unsigned char *)precvbuf);
213 }
214 }
215 } else {
216 switch (purb->status) {
217 case -EINVAL:
218 case -EPIPE:
219 case -ENODEV:
220 case -ESHUTDOWN:
221 padapter->driver_stopped = true;
222 break;
223 case -ENOENT:
224 if (!padapter->suspended) {
225 padapter->driver_stopped = true;
226 break;
227 }
228 fallthrough;
229 case -EPROTO:
230 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
231 (unsigned char *)precvbuf);
232 break;
233 case -EINPROGRESS:
234 netdev_err(padapter->pnetdev, "ERROR: URB IS IN PROGRESS!\n");
235 break;
236 default:
237 break;
238 }
239 }
240 }
241
r8712_usb_read_port(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * rmem)242 u32 r8712_usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
243 {
244 unsigned int pipe;
245 int err;
246 u32 tmpaddr = 0;
247 int alignment = 0;
248 u32 ret = _SUCCESS;
249 struct urb *purb = NULL;
250 struct recv_buf *precvbuf = (struct recv_buf *)rmem;
251 struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
252 struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
253 struct _adapter *adapter = pdvobj->padapter;
254 struct recv_priv *precvpriv = &adapter->recvpriv;
255 struct usb_device *pusbd = pdvobj->pusbdev;
256
257 if (adapter->driver_stopped || adapter->surprise_removed ||
258 adapter->pwrctrlpriv.pnp_bstop_trx || !precvbuf)
259 return _FAIL;
260 r8712_init_recvbuf(adapter, precvbuf);
261 /* Try to use skb from the free queue */
262 precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
263
264 if (!precvbuf->pskb) {
265 precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
266 MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
267 if (!precvbuf->pskb)
268 return _FAIL;
269 tmpaddr = (addr_t)precvbuf->pskb->data;
270 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
271 skb_reserve(precvbuf->pskb,
272 (RECVBUFF_ALIGN_SZ - alignment));
273 precvbuf->phead = precvbuf->pskb->head;
274 precvbuf->pdata = precvbuf->pskb->data;
275 precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
276 precvbuf->pend = skb_end_pointer(precvbuf->pskb);
277 precvbuf->pbuf = precvbuf->pskb->data;
278 } else { /* skb is reused */
279 precvbuf->phead = precvbuf->pskb->head;
280 precvbuf->pdata = precvbuf->pskb->data;
281 precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
282 precvbuf->pend = skb_end_pointer(precvbuf->pskb);
283 precvbuf->pbuf = precvbuf->pskb->data;
284 }
285 purb = precvbuf->purb;
286 /* translate DMA FIFO addr to pipehandle */
287 pipe = ffaddr2pipehdl(pdvobj, addr);
288 usb_fill_bulk_urb(purb, pusbd, pipe,
289 precvbuf->pbuf, MAX_RECVBUF_SZ,
290 r8712_usb_read_port_complete,
291 precvbuf);
292 err = usb_submit_urb(purb, GFP_ATOMIC);
293 if ((err) && (err != (-EPERM)))
294 ret = _FAIL;
295 return ret;
296 }
297
r8712_usb_read_port_cancel(struct _adapter * padapter)298 void r8712_usb_read_port_cancel(struct _adapter *padapter)
299 {
300 int i;
301 struct recv_buf *precvbuf;
302
303 precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
304 for (i = 0; i < NR_RECVBUFF; i++) {
305 if (precvbuf->purb)
306 usb_kill_urb(precvbuf->purb);
307 precvbuf++;
308 }
309 }
310
r8712_xmit_bh(struct tasklet_struct * t)311 void r8712_xmit_bh(struct tasklet_struct *t)
312 {
313 int ret = false;
314 struct _adapter *padapter = from_tasklet(padapter, t,
315 xmitpriv.xmit_tasklet);
316 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
317
318 if (padapter->driver_stopped ||
319 padapter->surprise_removed) {
320 netdev_err(padapter->pnetdev, "xmit_bh => driver_stopped or surprise_removed\n");
321 return;
322 }
323 ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
324 if (!ret)
325 return;
326 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
327 }
328
usb_write_port_complete(struct urb * purb)329 static void usb_write_port_complete(struct urb *purb)
330 {
331 int i;
332 struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
333 struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
334 struct _adapter *padapter = pxmitframe->padapter;
335 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
336 struct pkt_attrib *pattrib = &pxmitframe->attrib;
337
338 switch (pattrib->priority) {
339 case 1:
340 case 2:
341 pxmitpriv->bkq_cnt--;
342 break;
343 case 4:
344 case 5:
345 pxmitpriv->viq_cnt--;
346 break;
347 case 6:
348 case 7:
349 pxmitpriv->voq_cnt--;
350 break;
351 case 0:
352 case 3:
353 default:
354 pxmitpriv->beq_cnt--;
355 break;
356 }
357 pxmitpriv->txirp_cnt--;
358 for (i = 0; i < 8; i++) {
359 if (purb == pxmitframe->pxmit_urb[i]) {
360 pxmitframe->bpending[i] = false;
361 break;
362 }
363 }
364 if (padapter->surprise_removed)
365 return;
366 switch (purb->status) {
367 case 0:
368 break;
369 default:
370 netdev_warn(padapter->pnetdev,
371 "r8712u: pipe error: (%d)\n", purb->status);
372 break;
373 }
374 /* not to consider tx fragment */
375 r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
376 r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
377 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
378 }
379
r8712_usb_write_port(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * wmem)380 u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
381 {
382 unsigned long irqL;
383 int i, status;
384 unsigned int pipe;
385 u32 ret, bwritezero;
386 struct urb *purb = NULL;
387 struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
388 struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
389 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
390 struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
391 struct usb_device *pusbd = pdvobj->pusbdev;
392 struct pkt_attrib *pattrib = &pxmitframe->attrib;
393
394 if ((padapter->driver_stopped) || (padapter->surprise_removed) ||
395 (padapter->pwrctrlpriv.pnp_bstop_trx))
396 return _FAIL;
397 for (i = 0; i < 8; i++) {
398 if (!pxmitframe->bpending[i]) {
399 spin_lock_irqsave(&pxmitpriv->lock, irqL);
400 pxmitpriv->txirp_cnt++;
401 pxmitframe->bpending[i] = true;
402 switch (pattrib->priority) {
403 case 1:
404 case 2:
405 pxmitpriv->bkq_cnt++;
406 break;
407 case 4:
408 case 5:
409 pxmitpriv->viq_cnt++;
410 break;
411 case 6:
412 case 7:
413 pxmitpriv->voq_cnt++;
414 break;
415 case 0:
416 case 3:
417 default:
418 pxmitpriv->beq_cnt++;
419 break;
420 }
421 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
422 pxmitframe->sz[i] = (u16)cnt;
423 purb = pxmitframe->pxmit_urb[i];
424 break;
425 }
426 }
427 bwritezero = false;
428 if (pdvobj->ishighspeed) {
429 if (cnt > 0 && cnt % 512 == 0)
430 bwritezero = true;
431 } else {
432 if (cnt > 0 && cnt % 64 == 0)
433 bwritezero = true;
434 }
435 /* translate DMA FIFO addr to pipehandle */
436 pipe = ffaddr2pipehdl(pdvobj, addr);
437 if (pxmitpriv->free_xmitbuf_cnt % NR_XMITBUFF == 0)
438 purb->transfer_flags &= (~URB_NO_INTERRUPT);
439 else
440 purb->transfer_flags |= URB_NO_INTERRUPT;
441 if (bwritezero)
442 cnt += 8;
443 usb_fill_bulk_urb(purb, pusbd, pipe,
444 pxmitframe->mem_addr,
445 cnt, usb_write_port_complete,
446 pxmitframe); /* context is xmit_frame */
447 status = usb_submit_urb(purb, GFP_ATOMIC);
448 if (!status)
449 ret = _SUCCESS;
450 else
451 ret = _FAIL;
452 return ret;
453 }
454
r8712_usb_write_port_cancel(struct _adapter * padapter)455 void r8712_usb_write_port_cancel(struct _adapter *padapter)
456 {
457 int i, j;
458 struct xmit_buf *pxmitbuf = (struct xmit_buf *)
459 padapter->xmitpriv.pxmitbuf;
460
461 for (i = 0; i < NR_XMITBUFF; i++) {
462 for (j = 0; j < 8; j++) {
463 if (pxmitbuf->pxmit_urb[j])
464 usb_kill_urb(pxmitbuf->pxmit_urb[j]);
465 }
466 pxmitbuf++;
467 }
468 }
469
r8712_usbctrl_vendorreq(struct intf_priv * pintfpriv,u8 request,u16 value,u16 index,void * pdata,u16 len,u8 requesttype)470 int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
471 u16 index, void *pdata, u16 len, u8 requesttype)
472 {
473 unsigned int pipe;
474 int status;
475 u8 reqtype;
476 struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
477 pintfpriv->intf_dev;
478 struct usb_device *udev = pdvobjpriv->pusbdev;
479 /* For mstar platform, mstar suggests the address for USB IO
480 * should be 16 bytes alignment. Trying to fix it here.
481 */
482 u8 *palloc_buf, *pIo_buf;
483
484 palloc_buf = kmalloc((u32)len + 16, GFP_ATOMIC);
485 if (!palloc_buf)
486 return -ENOMEM;
487 pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
488 if (requesttype == 0x01) {
489 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
490 reqtype = RTL871X_VENQT_READ;
491 } else {
492 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
493 reqtype = RTL871X_VENQT_WRITE;
494 memcpy(pIo_buf, pdata, len);
495 }
496 status = usb_control_msg(udev, pipe, request, reqtype, value, index,
497 pIo_buf, len, 500);
498 if (status < 0)
499 goto free;
500 if (status != len) {
501 status = -EREMOTEIO;
502 goto free;
503 }
504 /* Success this control transfer. */
505 if (requesttype == 0x01) {
506 /* For Control read transfer, we have to copy the read
507 * data from pIo_buf to pdata.
508 */
509 memcpy(pdata, pIo_buf, status);
510 }
511
512 free:
513 kfree(palloc_buf);
514 return status;
515 }
516