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 sema_init(&(pintfpriv->io_retevt), 0);
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 up(&pintfpriv->io_retevt);
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 _down_sema(&pintfpriv->io_retevt);
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 precvbuf->reuse = true;
206 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
207 (unsigned char *)precvbuf);
208 } else {
209 precvbuf->transfer_len = purb->actual_length;
210 pbuf = (uint *)precvbuf->pbuf;
211 isevt = le32_to_cpu(*(pbuf + 1)) & 0x1ff;
212 if ((isevt & 0x1ff) == 0x1ff) {
213 r8712_rxcmd_event_hdl(padapter, pbuf);
214 precvbuf->reuse = true;
215 r8712_read_port(padapter, precvpriv->ff_hwaddr,
216 0, (unsigned char *)precvbuf);
217 } else {
218 _pkt *pskb = precvbuf->pskb;
219
220 skb_put(pskb, purb->actual_length);
221 skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
222 tasklet_hi_schedule(&precvpriv->recv_tasklet);
223 precvbuf->pskb = NULL;
224 precvbuf->reuse = false;
225 r8712_read_port(padapter, precvpriv->ff_hwaddr,
226 0, (unsigned char *)precvbuf);
227 }
228 }
229 } else {
230 switch (purb->status) {
231 case -EINVAL:
232 case -EPIPE:
233 case -ENODEV:
234 case -ESHUTDOWN:
235 case -ENOENT:
236 padapter->bDriverStopped = true;
237 break;
238 case -EPROTO:
239 precvbuf->reuse = true;
240 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
241 (unsigned char *)precvbuf);
242 break;
243 case -EINPROGRESS:
244 netdev_err(padapter->pnetdev, "ERROR: URB IS IN PROGRESS!\n");
245 break;
246 default:
247 break;
248 }
249 }
250 }
251
r8712_usb_read_port(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * rmem)252 u32 r8712_usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
253 {
254 unsigned int pipe;
255 int err;
256 u32 tmpaddr = 0;
257 int alignment = 0;
258 u32 ret = _SUCCESS;
259 struct urb *purb = NULL;
260 struct recv_buf *precvbuf = (struct recv_buf *)rmem;
261 struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
262 struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
263 struct _adapter *adapter = pdvobj->padapter;
264 struct recv_priv *precvpriv = &adapter->recvpriv;
265 struct usb_device *pusbd = pdvobj->pusbdev;
266
267 if (adapter->bDriverStopped || adapter->bSurpriseRemoved ||
268 adapter->pwrctrlpriv.pnp_bstop_trx)
269 return _FAIL;
270 if (precvbuf->reuse || !precvbuf->pskb) {
271 precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
272 if (precvbuf->pskb != NULL)
273 precvbuf->reuse = true;
274 }
275 if (precvbuf != NULL) {
276 r8712_init_recvbuf(adapter, precvbuf);
277 /* re-assign for linux based on skb */
278 if (!precvbuf->reuse || !precvbuf->pskb) {
279 precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
280 MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
281 if (!precvbuf->pskb)
282 return _FAIL;
283 tmpaddr = (addr_t)precvbuf->pskb->data;
284 alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
285 skb_reserve(precvbuf->pskb,
286 (RECVBUFF_ALIGN_SZ - alignment));
287 precvbuf->phead = precvbuf->pskb->head;
288 precvbuf->pdata = precvbuf->pskb->data;
289 precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
290 precvbuf->pend = skb_end_pointer(precvbuf->pskb);
291 precvbuf->pbuf = precvbuf->pskb->data;
292 } else { /* reuse skb */
293 precvbuf->phead = precvbuf->pskb->head;
294 precvbuf->pdata = precvbuf->pskb->data;
295 precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
296 precvbuf->pend = skb_end_pointer(precvbuf->pskb);
297 precvbuf->pbuf = precvbuf->pskb->data;
298 precvbuf->reuse = false;
299 }
300 purb = precvbuf->purb;
301 /* translate DMA FIFO addr to pipehandle */
302 pipe = ffaddr2pipehdl(pdvobj, addr);
303 usb_fill_bulk_urb(purb, pusbd, pipe,
304 precvbuf->pbuf, MAX_RECVBUF_SZ,
305 r8712_usb_read_port_complete,
306 precvbuf);
307 err = usb_submit_urb(purb, GFP_ATOMIC);
308 if ((err) && (err != (-EPERM)))
309 ret = _FAIL;
310 } else {
311 ret = _FAIL;
312 }
313 return ret;
314 }
315
r8712_usb_read_port_cancel(struct _adapter * padapter)316 void r8712_usb_read_port_cancel(struct _adapter *padapter)
317 {
318 int i;
319 struct recv_buf *precvbuf;
320
321 precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
322 for (i = 0; i < NR_RECVBUFF; i++) {
323 if (precvbuf->purb)
324 usb_kill_urb(precvbuf->purb);
325 precvbuf++;
326 }
327 }
328
r8712_xmit_bh(void * priv)329 void r8712_xmit_bh(void *priv)
330 {
331 int ret = false;
332 struct _adapter *padapter = (struct _adapter *)priv;
333 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
334
335 if (padapter->bDriverStopped ||
336 padapter->bSurpriseRemoved) {
337 netdev_err(padapter->pnetdev, "xmit_bh => bDriverStopped or bSurpriseRemoved\n");
338 return;
339 }
340 ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
341 if (!ret)
342 return;
343 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
344 }
345
usb_write_port_complete(struct urb * purb)346 static void usb_write_port_complete(struct urb *purb)
347 {
348 int i;
349 struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
350 struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
351 struct _adapter *padapter = pxmitframe->padapter;
352 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
353 struct pkt_attrib *pattrib = &pxmitframe->attrib;
354
355 switch (pattrib->priority) {
356 case 1:
357 case 2:
358 pxmitpriv->bkq_cnt--;
359 break;
360 case 4:
361 case 5:
362 pxmitpriv->viq_cnt--;
363 break;
364 case 6:
365 case 7:
366 pxmitpriv->voq_cnt--;
367 break;
368 case 0:
369 case 3:
370 default:
371 pxmitpriv->beq_cnt--;
372 break;
373 }
374 pxmitpriv->txirp_cnt--;
375 for (i = 0; i < 8; i++) {
376 if (purb == pxmitframe->pxmit_urb[i]) {
377 pxmitframe->bpending[i] = false;
378 break;
379 }
380 }
381 if (padapter->bSurpriseRemoved)
382 return;
383 switch (purb->status) {
384 case 0:
385 break;
386 default:
387 netdev_warn(padapter->pnetdev,
388 "r8712u: pipe error: (%d)\n", purb->status);
389 break;
390 }
391 /* not to consider tx fragment */
392 r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
393 r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
394 tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
395 }
396
r8712_usb_write_port(struct intf_hdl * pintfhdl,u32 addr,u32 cnt,u8 * wmem)397 u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
398 {
399 unsigned long irqL;
400 int i, status;
401 unsigned int pipe;
402 u32 ret, bwritezero;
403 struct urb *purb = NULL;
404 struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
405 struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
406 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
407 struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
408 struct usb_device *pusbd = pdvobj->pusbdev;
409 struct pkt_attrib *pattrib = &pxmitframe->attrib;
410
411 if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
412 (padapter->pwrctrlpriv.pnp_bstop_trx))
413 return _FAIL;
414 for (i = 0; i < 8; i++) {
415 if (!pxmitframe->bpending[i]) {
416 spin_lock_irqsave(&pxmitpriv->lock, irqL);
417 pxmitpriv->txirp_cnt++;
418 pxmitframe->bpending[i] = true;
419 switch (pattrib->priority) {
420 case 1:
421 case 2:
422 pxmitpriv->bkq_cnt++;
423 break;
424 case 4:
425 case 5:
426 pxmitpriv->viq_cnt++;
427 break;
428 case 6:
429 case 7:
430 pxmitpriv->voq_cnt++;
431 break;
432 case 0:
433 case 3:
434 default:
435 pxmitpriv->beq_cnt++;
436 break;
437 }
438 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
439 pxmitframe->sz[i] = (u16)cnt;
440 purb = pxmitframe->pxmit_urb[i];
441 break;
442 }
443 }
444 bwritezero = false;
445 if (pdvobj->ishighspeed) {
446 if (cnt > 0 && cnt % 512 == 0)
447 bwritezero = true;
448 } else {
449 if (cnt > 0 && cnt % 64 == 0)
450 bwritezero = true;
451 }
452 /* translate DMA FIFO addr to pipehandle */
453 pipe = ffaddr2pipehdl(pdvobj, addr);
454 if (pxmitpriv->free_xmitbuf_cnt % NR_XMITBUFF == 0)
455 purb->transfer_flags &= (~URB_NO_INTERRUPT);
456 else
457 purb->transfer_flags |= URB_NO_INTERRUPT;
458 if (bwritezero)
459 cnt += 8;
460 usb_fill_bulk_urb(purb, pusbd, pipe,
461 pxmitframe->mem_addr,
462 cnt, usb_write_port_complete,
463 pxmitframe); /* context is xmit_frame */
464 status = usb_submit_urb(purb, GFP_ATOMIC);
465 if (!status)
466 ret = _SUCCESS;
467 else
468 ret = _FAIL;
469 return ret;
470 }
471
r8712_usb_write_port_cancel(struct _adapter * padapter)472 void r8712_usb_write_port_cancel(struct _adapter *padapter)
473 {
474 int i, j;
475 struct xmit_buf *pxmitbuf = (struct xmit_buf *)
476 padapter->xmitpriv.pxmitbuf;
477
478 for (i = 0; i < NR_XMITBUFF; i++) {
479 for (j = 0; j < 8; j++) {
480 if (pxmitbuf->pxmit_urb[j])
481 usb_kill_urb(pxmitbuf->pxmit_urb[j]);
482 }
483 pxmitbuf++;
484 }
485 }
486
r8712_usbctrl_vendorreq(struct intf_priv * pintfpriv,u8 request,u16 value,u16 index,void * pdata,u16 len,u8 requesttype)487 int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
488 u16 index, void *pdata, u16 len, u8 requesttype)
489 {
490 unsigned int pipe;
491 int status;
492 u8 reqtype;
493 struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
494 pintfpriv->intf_dev;
495 struct usb_device *udev = pdvobjpriv->pusbdev;
496 /* For mstar platform, mstar suggests the address for USB IO
497 * should be 16 bytes alignment. Trying to fix it here.
498 */
499 u8 *palloc_buf, *pIo_buf;
500
501 palloc_buf = kmalloc((u32)len + 16, GFP_ATOMIC);
502 if (palloc_buf == NULL)
503 return -ENOMEM;
504 pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
505 if (requesttype == 0x01) {
506 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
507 reqtype = RTL871X_VENQT_READ;
508 } else {
509 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
510 reqtype = RTL871X_VENQT_WRITE;
511 memcpy(pIo_buf, pdata, len);
512 }
513 status = usb_control_msg(udev, pipe, request, reqtype, value, index,
514 pIo_buf, len, HZ / 2);
515 if (status > 0) { /* Success this control transfer. */
516 if (requesttype == 0x01) {
517 /* For Control read transfer, we have to copy the read
518 * data from pIo_buf to pdata.
519 */
520 memcpy(pdata, pIo_buf, status);
521 }
522 }
523 kfree(palloc_buf);
524 return status;
525 }
526