1 /******************************************************************************
2 * usb_ops_linux.c
3 *
4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5 * Linux device driver for RTL8192SU
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 *
20 * Modifications for inclusion into the Linux staging tree are
21 * Copyright(c) 2010 Larry Finger. All rights reserved.
22 *
23 * Contact information:
24 * WLAN FAE <wlanfae@realtek.com>
25 * Larry Finger <Larry.Finger@lwfinger.net>
26 *
27 ******************************************************************************/
28
29 #define _HCI_OPS_OS_C_
30
31 #include <linux/usb.h>
32
33 #include "osdep_service.h"
34 #include "drv_types.h"
35 #include "osdep_intf.h"
36 #include "usb_ops.h"
37
38 #define RTL871X_VENQT_READ 0xc0
39 #define RTL871X_VENQT_WRITE 0x40
40
41 struct zero_bulkout_context {
42 void *pbuf;
43 void *purb;
44 void *pirp;
45 void *padapter;
46 };
47
r8712_usb_init_intf_priv(struct intf_priv * pintfpriv)48 uint r8712_usb_init_intf_priv(struct intf_priv *pintfpriv)
49 {
50 pintfpriv->piorw_urb = usb_alloc_urb(0, GFP_ATOMIC);
51 if (!pintfpriv->piorw_urb)
52 return _FAIL;
53 init_completion(&pintfpriv->io_retevt_comp);
54 return _SUCCESS;
55 }
56
r8712_usb_unload_intf_priv(struct intf_priv * pintfpriv)57 void r8712_usb_unload_intf_priv(struct intf_priv *pintfpriv)
58 {
59 if (pintfpriv->piorw_urb) {
60 usb_kill_urb(pintfpriv->piorw_urb);
61 usb_free_urb(pintfpriv->piorw_urb);
62 }
63 }
64
ffaddr2pipehdl(struct dvobj_priv * pdvobj,u32 addr)65 static unsigned int ffaddr2pipehdl(struct dvobj_priv *pdvobj, u32 addr)
66 {
67 unsigned int pipe = 0;
68 struct usb_device *pusbd = pdvobj->pusbdev;
69
70 if (pdvobj->nr_endpoint == 11) {
71 switch (addr) {
72 case RTL8712_DMA_BKQ:
73 pipe = usb_sndbulkpipe(pusbd, 0x07);
74 break;
75 case RTL8712_DMA_BEQ:
76 pipe = usb_sndbulkpipe(pusbd, 0x06);
77 break;
78 case RTL8712_DMA_VIQ:
79 pipe = usb_sndbulkpipe(pusbd, 0x05);
80 break;
81 case RTL8712_DMA_VOQ:
82 pipe = usb_sndbulkpipe(pusbd, 0x04);
83 break;
84 case RTL8712_DMA_BCNQ:
85 pipe = usb_sndbulkpipe(pusbd, 0x0a);
86 break;
87 case RTL8712_DMA_BMCQ: /* HI Queue */
88 pipe = usb_sndbulkpipe(pusbd, 0x0b);
89 break;
90 case RTL8712_DMA_MGTQ:
91 pipe = usb_sndbulkpipe(pusbd, 0x0c);
92 break;
93 case RTL8712_DMA_RX0FF:
94 pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
95 break;
96 case RTL8712_DMA_C2HCMD:
97 pipe = usb_rcvbulkpipe(pusbd, 0x09); /* in */
98 break;
99 case RTL8712_DMA_H2CCMD:
100 pipe = usb_sndbulkpipe(pusbd, 0x0d);
101 break;
102 }
103 } else if (pdvobj->nr_endpoint == 6) {
104 switch (addr) {
105 case RTL8712_DMA_BKQ:
106 pipe = usb_sndbulkpipe(pusbd, 0x07);
107 break;
108 case RTL8712_DMA_BEQ:
109 pipe = usb_sndbulkpipe(pusbd, 0x06);
110 break;
111 case RTL8712_DMA_VIQ:
112 pipe = usb_sndbulkpipe(pusbd, 0x05);
113 break;
114 case RTL8712_DMA_VOQ:
115 pipe = usb_sndbulkpipe(pusbd, 0x04);
116 break;
117 case RTL8712_DMA_RX0FF:
118 case RTL8712_DMA_C2HCMD:
119 pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
120 break;
121 case RTL8712_DMA_H2CCMD:
122 case RTL8712_DMA_BCNQ:
123 case RTL8712_DMA_BMCQ:
124 case RTL8712_DMA_MGTQ:
125 pipe = usb_sndbulkpipe(pusbd, 0x0d);
126 break;
127 }
128 } else if (pdvobj->nr_endpoint == 4) {
129 switch (addr) {
130 case RTL8712_DMA_BEQ:
131 pipe = usb_sndbulkpipe(pusbd, 0x06);
132 break;
133 case RTL8712_DMA_VOQ:
134 pipe = usb_sndbulkpipe(pusbd, 0x04);
135 break;
136 case RTL8712_DMA_RX0FF:
137 case RTL8712_DMA_C2HCMD:
138 pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
139 break;
140 case RTL8712_DMA_H2CCMD:
141 case RTL8712_DMA_BCNQ:
142 case RTL8712_DMA_BMCQ:
143 case RTL8712_DMA_MGTQ:
144 pipe = usb_sndbulkpipe(pusbd, 0x0d);
145 break;
146 }
147 } else {
148 pipe = 0;
149 }
150 return pipe;
151 }
152
usb_write_mem_complete(struct urb * purb)153 static void usb_write_mem_complete(struct urb *purb)
154 {
155 struct io_queue *pio_q = (struct io_queue *)purb->context;
156 struct intf_hdl *pintf = &(pio_q->intf);
157 struct intf_priv *pintfpriv = pintf->pintfpriv;
158 struct _adapter *padapter = (struct _adapter *)pintf->adapter;
159
160 if (purb->status != 0) {
161 if (purb->status == (-ESHUTDOWN))
162 padapter->bDriverStopped = true;
163 else
164 padapter->bSurpriseRemoved = true;
165 }
166 complete(&pintfpriv->io_retevt_comp);
167 }
168
r8712_usb_write_mem(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * wmem)169 void r8712_usb_write_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
170 {
171 unsigned int pipe;
172 struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
173 struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
174 struct io_queue *pio_queue = padapter->pio_queue;
175 struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
176 struct usb_device *pusbd = pdvobj->pusbdev;
177 struct urb *piorw_urb = pintfpriv->piorw_urb;
178
179 if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
180 (padapter->pwrctrlpriv.pnp_bstop_trx))
181 return;
182 /* translate DMA FIFO addr to pipehandle */
183 pipe = ffaddr2pipehdl(pdvobj, addr);
184 if (pipe == 0)
185 return;
186 usb_fill_bulk_urb(piorw_urb, pusbd, pipe,
187 wmem, cnt, usb_write_mem_complete,
188 pio_queue);
189 usb_submit_urb(piorw_urb, GFP_ATOMIC);
190 wait_for_completion_interruptible(&pintfpriv->io_retevt_comp);
191 }
192
r8712_usb_read_port_complete(struct urb * purb)193 static void r8712_usb_read_port_complete(struct urb *purb)
194 {
195 uint isevt, *pbuf;
196 struct recv_buf *precvbuf = (struct recv_buf *)purb->context;
197 struct _adapter *padapter = (struct _adapter *)precvbuf->adapter;
198 struct recv_priv *precvpriv = &padapter->recvpriv;
199
200 if (padapter->bSurpriseRemoved || padapter->bDriverStopped)
201 return;
202 if (purb->status == 0) { /* SUCCESS */
203 if ((purb->actual_length > (MAX_RECVBUF_SZ)) ||
204 (purb->actual_length < RXDESC_SIZE)) {
205 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
206 (unsigned char *)precvbuf);
207 } else {
208 _pkt *pskb = precvbuf->pskb;
209
210 precvbuf->transfer_len = purb->actual_length;
211 pbuf = (uint *)precvbuf->pbuf;
212 isevt = le32_to_cpu(*(pbuf + 1)) & 0x1ff;
213 if ((isevt & 0x1ff) == 0x1ff) {
214 r8712_rxcmd_event_hdl(padapter, pbuf);
215 skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
216 r8712_read_port(padapter, precvpriv->ff_hwaddr,
217 0, (unsigned char *)precvbuf);
218 } else {
219 skb_put(pskb, purb->actual_length);
220 skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
221 tasklet_hi_schedule(&precvpriv->recv_tasklet);
222 r8712_read_port(padapter, precvpriv->ff_hwaddr,
223 0, (unsigned char *)precvbuf);
224 }
225 }
226 } else {
227 switch (purb->status) {
228 case -EINVAL:
229 case -EPIPE:
230 case -ENODEV:
231 case -ESHUTDOWN:
232 padapter->bDriverStopped = true;
233 break;
234 case -ENOENT:
235 if (!padapter->bSuspended) {
236 padapter->bDriverStopped = true;
237 break;
238 }
239 /* Fall through. */
240 case -EPROTO:
241 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
242 (unsigned char *)precvbuf);
243 break;
244 case -EINPROGRESS:
245 netdev_err(padapter->pnetdev, "ERROR: URB IS IN PROGRESS!\n");
246 break;
247 default:
248 break;
249 }
250 }
251 }
252
r8712_usb_read_port(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * rmem)253 u32 r8712_usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
254 {
255 unsigned int pipe;
256 int err;
257 u32 tmpaddr = 0;
258 int alignment = 0;
259 u32 ret = _SUCCESS;
260 struct urb *purb = NULL;
261 struct recv_buf *precvbuf = (struct recv_buf *)rmem;
262 struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
263 struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
264 struct _adapter *adapter = pdvobj->padapter;
265 struct recv_priv *precvpriv = &adapter->recvpriv;
266 struct usb_device *pusbd = pdvobj->pusbdev;
267
268 if (adapter->bDriverStopped || adapter->bSurpriseRemoved ||
269 adapter->pwrctrlpriv.pnp_bstop_trx || !precvbuf)
270 return _FAIL;
271 r8712_init_recvbuf(adapter, precvbuf);
272 /* Try to use skb from the free queue */
273 precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
274
275 if (!precvbuf->pskb) {
276 precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
277 MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
278 if (!precvbuf->pskb)
279 return _FAIL;
280 tmpaddr = (addr_t)precvbuf->pskb->data;
281 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
282 skb_reserve(precvbuf->pskb,
283 (RECVBUFF_ALIGN_SZ - alignment));
284 precvbuf->phead = precvbuf->pskb->head;
285 precvbuf->pdata = precvbuf->pskb->data;
286 precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
287 precvbuf->pend = skb_end_pointer(precvbuf->pskb);
288 precvbuf->pbuf = precvbuf->pskb->data;
289 } else { /* skb is reused */
290 precvbuf->phead = precvbuf->pskb->head;
291 precvbuf->pdata = precvbuf->pskb->data;
292 precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
293 precvbuf->pend = skb_end_pointer(precvbuf->pskb);
294 precvbuf->pbuf = precvbuf->pskb->data;
295 }
296 purb = precvbuf->purb;
297 /* translate DMA FIFO addr to pipehandle */
298 pipe = ffaddr2pipehdl(pdvobj, addr);
299 usb_fill_bulk_urb(purb, pusbd, pipe,
300 precvbuf->pbuf, MAX_RECVBUF_SZ,
301 r8712_usb_read_port_complete,
302 precvbuf);
303 err = usb_submit_urb(purb, GFP_ATOMIC);
304 if ((err) && (err != (-EPERM)))
305 ret = _FAIL;
306 return ret;
307 }
308
r8712_usb_read_port_cancel(struct _adapter * padapter)309 void r8712_usb_read_port_cancel(struct _adapter *padapter)
310 {
311 int i;
312 struct recv_buf *precvbuf;
313
314 precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
315 for (i = 0; i < NR_RECVBUFF; i++) {
316 if (precvbuf->purb)
317 usb_kill_urb(precvbuf->purb);
318 precvbuf++;
319 }
320 }
321
r8712_xmit_bh(void * priv)322 void r8712_xmit_bh(void *priv)
323 {
324 int ret = false;
325 struct _adapter *padapter = priv;
326 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
327
328 if (padapter->bDriverStopped ||
329 padapter->bSurpriseRemoved) {
330 netdev_err(padapter->pnetdev, "xmit_bh => bDriverStopped or bSurpriseRemoved\n");
331 return;
332 }
333 ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
334 if (!ret)
335 return;
336 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
337 }
338
usb_write_port_complete(struct urb * purb)339 static void usb_write_port_complete(struct urb *purb)
340 {
341 int i;
342 struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
343 struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
344 struct _adapter *padapter = pxmitframe->padapter;
345 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
346 struct pkt_attrib *pattrib = &pxmitframe->attrib;
347
348 switch (pattrib->priority) {
349 case 1:
350 case 2:
351 pxmitpriv->bkq_cnt--;
352 break;
353 case 4:
354 case 5:
355 pxmitpriv->viq_cnt--;
356 break;
357 case 6:
358 case 7:
359 pxmitpriv->voq_cnt--;
360 break;
361 case 0:
362 case 3:
363 default:
364 pxmitpriv->beq_cnt--;
365 break;
366 }
367 pxmitpriv->txirp_cnt--;
368 for (i = 0; i < 8; i++) {
369 if (purb == pxmitframe->pxmit_urb[i]) {
370 pxmitframe->bpending[i] = false;
371 break;
372 }
373 }
374 if (padapter->bSurpriseRemoved)
375 return;
376 switch (purb->status) {
377 case 0:
378 break;
379 default:
380 netdev_warn(padapter->pnetdev,
381 "r8712u: pipe error: (%d)\n", purb->status);
382 break;
383 }
384 /* not to consider tx fragment */
385 r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
386 r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
387 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
388 }
389
r8712_usb_write_port(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * wmem)390 u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
391 {
392 unsigned long irqL;
393 int i, status;
394 unsigned int pipe;
395 u32 ret, bwritezero;
396 struct urb *purb = NULL;
397 struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
398 struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
399 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
400 struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
401 struct usb_device *pusbd = pdvobj->pusbdev;
402 struct pkt_attrib *pattrib = &pxmitframe->attrib;
403
404 if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
405 (padapter->pwrctrlpriv.pnp_bstop_trx))
406 return _FAIL;
407 for (i = 0; i < 8; i++) {
408 if (!pxmitframe->bpending[i]) {
409 spin_lock_irqsave(&pxmitpriv->lock, irqL);
410 pxmitpriv->txirp_cnt++;
411 pxmitframe->bpending[i] = true;
412 switch (pattrib->priority) {
413 case 1:
414 case 2:
415 pxmitpriv->bkq_cnt++;
416 break;
417 case 4:
418 case 5:
419 pxmitpriv->viq_cnt++;
420 break;
421 case 6:
422 case 7:
423 pxmitpriv->voq_cnt++;
424 break;
425 case 0:
426 case 3:
427 default:
428 pxmitpriv->beq_cnt++;
429 break;
430 }
431 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
432 pxmitframe->sz[i] = (u16)cnt;
433 purb = pxmitframe->pxmit_urb[i];
434 break;
435 }
436 }
437 bwritezero = false;
438 if (pdvobj->ishighspeed) {
439 if (cnt > 0 && cnt % 512 == 0)
440 bwritezero = true;
441 } else {
442 if (cnt > 0 && cnt % 64 == 0)
443 bwritezero = true;
444 }
445 /* translate DMA FIFO addr to pipehandle */
446 pipe = ffaddr2pipehdl(pdvobj, addr);
447 if (pxmitpriv->free_xmitbuf_cnt % NR_XMITBUFF == 0)
448 purb->transfer_flags &= (~URB_NO_INTERRUPT);
449 else
450 purb->transfer_flags |= URB_NO_INTERRUPT;
451 if (bwritezero)
452 cnt += 8;
453 usb_fill_bulk_urb(purb, pusbd, pipe,
454 pxmitframe->mem_addr,
455 cnt, usb_write_port_complete,
456 pxmitframe); /* context is xmit_frame */
457 status = usb_submit_urb(purb, GFP_ATOMIC);
458 if (!status)
459 ret = _SUCCESS;
460 else
461 ret = _FAIL;
462 return ret;
463 }
464
r8712_usb_write_port_cancel(struct _adapter * padapter)465 void r8712_usb_write_port_cancel(struct _adapter *padapter)
466 {
467 int i, j;
468 struct xmit_buf *pxmitbuf = (struct xmit_buf *)
469 padapter->xmitpriv.pxmitbuf;
470
471 for (i = 0; i < NR_XMITBUFF; i++) {
472 for (j = 0; j < 8; j++) {
473 if (pxmitbuf->pxmit_urb[j])
474 usb_kill_urb(pxmitbuf->pxmit_urb[j]);
475 }
476 pxmitbuf++;
477 }
478 }
479
r8712_usbctrl_vendorreq(struct intf_priv * pintfpriv,u8 request,u16 value,u16 index,void * pdata,u16 len,u8 requesttype)480 int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
481 u16 index, void *pdata, u16 len, u8 requesttype)
482 {
483 unsigned int pipe;
484 int status;
485 u8 reqtype;
486 struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
487 pintfpriv->intf_dev;
488 struct usb_device *udev = pdvobjpriv->pusbdev;
489 /* For mstar platform, mstar suggests the address for USB IO
490 * should be 16 bytes alignment. Trying to fix it here.
491 */
492 u8 *palloc_buf, *pIo_buf;
493
494 palloc_buf = kmalloc((u32)len + 16, GFP_ATOMIC);
495 if (!palloc_buf)
496 return -ENOMEM;
497 pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
498 if (requesttype == 0x01) {
499 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
500 reqtype = RTL871X_VENQT_READ;
501 } else {
502 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
503 reqtype = RTL871X_VENQT_WRITE;
504 memcpy(pIo_buf, pdata, len);
505 }
506 status = usb_control_msg(udev, pipe, request, reqtype, value, index,
507 pIo_buf, len, HZ / 2);
508 if (status > 0) { /* Success this control transfer. */
509 if (requesttype == 0x01) {
510 /* For Control read transfer, we have to copy the read
511 * data from pIo_buf to pdata.
512 */
513 memcpy(pdata, pIo_buf, status);
514 }
515 }
516 kfree(palloc_buf);
517 return status;
518 }
519