drivers/staging/rtl8712/usb_ops_linux.c

   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
  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
  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
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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 }