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         init_completion(&pintfpriv->io_retevt_comp);
  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         complete(&pintfpriv->io_retevt_comp);
 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         wait_for_completion_interruptible(&pintfpriv->io_retevt_comp);
 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                         padapter->bDriverStopped = true;
 236                         break;
 237                 case -ENOENT:
 238                         if (!padapter->bSuspended) {
 239                                 padapter->bDriverStopped = true;
 240                                 break;
 241                         }
 242                         /* Fall through. */
 243                 case -EPROTO:
 244                         precvbuf->reuse = true;
 245                         r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 246                                   (unsigned char *)precvbuf);
 247                         break;
 248                 case -EINPROGRESS:
 249                         netdev_err(padapter->pnetdev, "ERROR: URB IS IN PROGRESS!\n");
 250                         break;
 251                 default:
 252                         break;
 253                 }
 254         }
 255 }
 256
 257 u32 r8712_usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
 258 {
 259         unsigned int pipe;
 260         int err;
 261         u32 tmpaddr = 0;
 262         int alignment = 0;
 263         u32 ret = _SUCCESS;
 264         struct urb *purb = NULL;
 265         struct recv_buf *precvbuf = (struct recv_buf *)rmem;
 266         struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
 267         struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
 268         struct _adapter *adapter = pdvobj->padapter;
 269         struct recv_priv *precvpriv = &adapter->recvpriv;
 270         struct usb_device *pusbd = pdvobj->pusbdev;
 271
 272         if (adapter->bDriverStopped || adapter->bSurpriseRemoved ||
 273             adapter->pwrctrlpriv.pnp_bstop_trx)
 274                 return _FAIL;
 275         if (precvbuf->reuse || !precvbuf->pskb) {
 276                 precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
 277                 if (precvbuf->pskb != NULL)
 278                         precvbuf->reuse = true;
 279         }
 280         if (precvbuf != NULL) {
 281                 r8712_init_recvbuf(adapter, precvbuf);
 282                 /* re-assign for linux based on skb */
 283                 if (!precvbuf->reuse || !precvbuf->pskb) {
 284                         precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
 285                                          MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
 286                         if (!precvbuf->pskb)
 287                                 return _FAIL;
 288                         tmpaddr = (addr_t)precvbuf->pskb->data;
 289                         alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
 290                         skb_reserve(precvbuf->pskb,
 291                                     (RECVBUFF_ALIGN_SZ - alignment));
 292                         precvbuf->phead = precvbuf->pskb->head;
 293                         precvbuf->pdata = precvbuf->pskb->data;
 294                         precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
 295                         precvbuf->pend = skb_end_pointer(precvbuf->pskb);
 296                         precvbuf->pbuf = precvbuf->pskb->data;
 297                 } else { /* reuse skb */
 298                         precvbuf->phead = precvbuf->pskb->head;
 299                         precvbuf->pdata = precvbuf->pskb->data;
 300                         precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
 301                         precvbuf->pend = skb_end_pointer(precvbuf->pskb);
 302                         precvbuf->pbuf = precvbuf->pskb->data;
 303                         precvbuf->reuse = false;
 304                 }
 305                 purb = precvbuf->purb;
 306                 /* translate DMA FIFO addr to pipehandle */
 307                 pipe = ffaddr2pipehdl(pdvobj, addr);
 308                 usb_fill_bulk_urb(purb, pusbd, pipe,
 309                                   precvbuf->pbuf, MAX_RECVBUF_SZ,
 310                                   r8712_usb_read_port_complete,
 311                                   precvbuf);
 312                 err = usb_submit_urb(purb, GFP_ATOMIC);
 313                 if ((err) && (err != (-EPERM)))
 314                         ret = _FAIL;
 315         } else {
 316                 ret = _FAIL;
 317         }
 318         return ret;
 319 }
 320
 321 void r8712_usb_read_port_cancel(struct _adapter *padapter)
 322 {
 323         int i;
 324         struct recv_buf *precvbuf;
 325
 326         precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
 327         for (i = 0; i < NR_RECVBUFF; i++) {
 328                 if (precvbuf->purb)
 329                         usb_kill_urb(precvbuf->purb);
 330                 precvbuf++;
 331         }
 332 }
 333
 334 void r8712_xmit_bh(void *priv)
 335 {
 336         int ret = false;
 337         struct _adapter *padapter = priv;
 338         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 339
 340         if (padapter->bDriverStopped ||
 341             padapter->bSurpriseRemoved) {
 342                 netdev_err(padapter->pnetdev, "xmit_bh => bDriverStopped or bSurpriseRemoved\n");
 343                 return;
 344         }
 345         ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
 346         if (!ret)
 347                 return;
 348         tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 349 }
 350
 351 static void usb_write_port_complete(struct urb *purb)
 352 {
 353         int i;
 354         struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
 355         struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
 356         struct _adapter *padapter = pxmitframe->padapter;
 357         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 358         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 359
 360         switch (pattrib->priority) {
 361         case 1:
 362         case 2:
 363                 pxmitpriv->bkq_cnt--;
 364                 break;
 365         case 4:
 366         case 5:
 367                 pxmitpriv->viq_cnt--;
 368                 break;
 369         case 6:
 370         case 7:
 371                 pxmitpriv->voq_cnt--;
 372                 break;
 373         case 0:
 374         case 3:
 375         default:
 376                 pxmitpriv->beq_cnt--;
 377                 break;
 378         }
 379         pxmitpriv->txirp_cnt--;
 380         for (i = 0; i < 8; i++) {
 381                 if (purb == pxmitframe->pxmit_urb[i]) {
 382                         pxmitframe->bpending[i] = false;
 383                         break;
 384                 }
 385         }
 386         if (padapter->bSurpriseRemoved)
 387                 return;
 388         switch (purb->status) {
 389         case 0:
 390                 break;
 391         default:
 392                 netdev_warn(padapter->pnetdev,
 393                                 "r8712u: pipe error: (%d)\n", purb->status);
 394                 break;
 395         }
 396         /* not to consider tx fragment */
 397         r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
 398         r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
 399         tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 400 }
 401
 402 u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 403 {
 404         unsigned long irqL;
 405         int i, status;
 406         unsigned int pipe;
 407         u32 ret, bwritezero;
 408         struct urb *purb = NULL;
 409         struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
 410         struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
 411         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 412         struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
 413         struct usb_device *pusbd = pdvobj->pusbdev;
 414         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 415
 416         if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
 417             (padapter->pwrctrlpriv.pnp_bstop_trx))
 418                 return _FAIL;
 419         for (i = 0; i < 8; i++) {
 420                 if (!pxmitframe->bpending[i]) {
 421                         spin_lock_irqsave(&pxmitpriv->lock, irqL);
 422                         pxmitpriv->txirp_cnt++;
 423                         pxmitframe->bpending[i]  = true;
 424                         switch (pattrib->priority) {
 425                         case 1:
 426                         case 2:
 427                                 pxmitpriv->bkq_cnt++;
 428                                 break;
 429                         case 4:
 430                         case 5:
 431                                 pxmitpriv->viq_cnt++;
 432                                 break;
 433                         case 6:
 434                         case 7:
 435                                 pxmitpriv->voq_cnt++;
 436                                 break;
 437                         case 0:
 438                         case 3:
 439                         default:
 440                                 pxmitpriv->beq_cnt++;
 441                                 break;
 442                         }
 443                         spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
 444                         pxmitframe->sz[i] = (u16)cnt;
 445                         purb = pxmitframe->pxmit_urb[i];
 446                         break;
 447                 }
 448         }
 449         bwritezero = false;
 450         if (pdvobj->ishighspeed) {
 451                 if (cnt > 0 && cnt % 512 == 0)
 452                         bwritezero = true;
 453         } else {
 454                 if (cnt > 0 && cnt % 64 == 0)
 455                         bwritezero = true;
 456         }
 457         /* translate DMA FIFO addr to pipehandle */
 458         pipe = ffaddr2pipehdl(pdvobj, addr);
 459         if (pxmitpriv->free_xmitbuf_cnt % NR_XMITBUFF == 0)
 460                 purb->transfer_flags  &=  (~URB_NO_INTERRUPT);
 461         else
 462                 purb->transfer_flags  |=  URB_NO_INTERRUPT;
 463         if (bwritezero)
 464                 cnt += 8;
 465         usb_fill_bulk_urb(purb, pusbd, pipe,
 466                           pxmitframe->mem_addr,
 467                           cnt, usb_write_port_complete,
 468                           pxmitframe); /* context is xmit_frame */
 469         status = usb_submit_urb(purb, GFP_ATOMIC);
 470         if (!status)
 471                 ret = _SUCCESS;
 472         else
 473                 ret = _FAIL;
 474         return ret;
 475 }
 476
 477 void r8712_usb_write_port_cancel(struct _adapter *padapter)
 478 {
 479         int i, j;
 480         struct xmit_buf *pxmitbuf = (struct xmit_buf *)
 481                                      padapter->xmitpriv.pxmitbuf;
 482
 483         for (i = 0; i < NR_XMITBUFF; i++) {
 484                 for (j = 0; j < 8; j++) {
 485                         if (pxmitbuf->pxmit_urb[j])
 486                                 usb_kill_urb(pxmitbuf->pxmit_urb[j]);
 487                 }
 488                 pxmitbuf++;
 489         }
 490 }
 491
 492 int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
 493                       u16 index, void *pdata, u16 len, u8 requesttype)
 494 {
 495         unsigned int pipe;
 496         int status;
 497         u8 reqtype;
 498         struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
 499                                          pintfpriv->intf_dev;
 500         struct usb_device *udev = pdvobjpriv->pusbdev;
 501         /* For mstar platform, mstar suggests the address for USB IO
 502          * should be 16 bytes alignment. Trying to fix it here.
 503          */
 504         u8 *palloc_buf, *pIo_buf;
 505
 506         palloc_buf = kmalloc((u32)len + 16, GFP_ATOMIC);
 507         if (!palloc_buf)
 508                 return -ENOMEM;
 509         pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
 510         if (requesttype == 0x01) {
 511                 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 512                 reqtype =  RTL871X_VENQT_READ;
 513         } else {
 514                 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 515                 reqtype =  RTL871X_VENQT_WRITE;
 516                 memcpy(pIo_buf, pdata, len);
 517         }
 518         status = usb_control_msg(udev, pipe, request, reqtype, value, index,
 519                                  pIo_buf, len, HZ / 2);
 520         if (status > 0) {  /* Success this control transfer. */
 521                 if (requesttype == 0x01) {
 522                         /* For Control read transfer, we have to copy the read
 523                          * data from pIo_buf to pdata.
 524                          */
 525                         memcpy(pdata, pIo_buf,  status);
 526                 }
 527         }
 528         kfree(palloc_buf);
 529         return status;
 530 }