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 "osdep_service.h"
  32 #include "drv_types.h"
  33 #include "osdep_intf.h"
  34 #include "usb_ops.h"
  35
  36 #define RTL871X_VENQT_READ      0xc0
  37 #define RTL871X_VENQT_WRITE     0x40
  38
  39 struct zero_bulkout_context {
  40         void *pbuf;
  41         void *purb;
  42         void *pirp;
  43         void *padapter;
  44 };
  45
  46 #define usb_write_cmd r8712_usb_write_mem
  47 #define usb_write_cmd_complete usb_write_mem_complete
  48
  49 uint r8712_usb_init_intf_priv(struct intf_priv *pintfpriv)
  50 {
  51         pintfpriv->piorw_urb = usb_alloc_urb(0, GFP_ATOMIC);
  52         if (!pintfpriv->piorw_urb)
  53                 return _FAIL;
  54         sema_init(&(pintfpriv->io_retevt), 0);
  55         return _SUCCESS;
  56 }
  57
  58 void r8712_usb_unload_intf_priv(struct intf_priv *pintfpriv)
  59 {
  60         if (pintfpriv->piorw_urb) {
  61                 usb_kill_urb(pintfpriv->piorw_urb);
  62                 usb_free_urb(pintfpriv->piorw_urb);
  63         }
  64 }
  65
  66 static unsigned int ffaddr2pipehdl(struct dvobj_priv *pdvobj, u32 addr)
  67 {
  68         unsigned int pipe = 0;
  69         struct usb_device *pusbd = pdvobj->pusbdev;
  70
  71         if (pdvobj->nr_endpoint == 11) {
  72                 switch (addr) {
  73                 case RTL8712_DMA_BKQ:
  74                         pipe = usb_sndbulkpipe(pusbd, 0x07);
  75                         break;
  76                 case RTL8712_DMA_BEQ:
  77                         pipe = usb_sndbulkpipe(pusbd, 0x06);
  78                         break;
  79                 case RTL8712_DMA_VIQ:
  80                         pipe = usb_sndbulkpipe(pusbd, 0x05);
  81                         break;
  82                 case RTL8712_DMA_VOQ:
  83                         pipe = usb_sndbulkpipe(pusbd, 0x04);
  84                         break;
  85                 case RTL8712_DMA_BCNQ:
  86                         pipe = usb_sndbulkpipe(pusbd, 0x0a);
  87                         break;
  88                 case RTL8712_DMA_BMCQ:  /* HI Queue */
  89                         pipe = usb_sndbulkpipe(pusbd, 0x0b);
  90                         break;
  91                 case RTL8712_DMA_MGTQ:
  92                         pipe = usb_sndbulkpipe(pusbd, 0x0c);
  93                         break;
  94                 case RTL8712_DMA_RX0FF:
  95                         pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
  96                         break;
  97                 case RTL8712_DMA_C2HCMD:
  98                         pipe = usb_rcvbulkpipe(pusbd, 0x09); /* in */
  99                         break;
 100                 case RTL8712_DMA_H2CCMD:
 101                         pipe = usb_sndbulkpipe(pusbd, 0x0d);
 102                         break;
 103                 }
 104         } else if (pdvobj->nr_endpoint == 6) {
 105                 switch (addr) {
 106                 case RTL8712_DMA_BKQ:
 107                         pipe = usb_sndbulkpipe(pusbd, 0x07);
 108                         break;
 109                 case RTL8712_DMA_BEQ:
 110                         pipe = usb_sndbulkpipe(pusbd, 0x06);
 111                         break;
 112                 case RTL8712_DMA_VIQ:
 113                         pipe = usb_sndbulkpipe(pusbd, 0x05);
 114                         break;
 115                 case RTL8712_DMA_VOQ:
 116                         pipe = usb_sndbulkpipe(pusbd, 0x04);
 117                         break;
 118                 case RTL8712_DMA_RX0FF:
 119                 case RTL8712_DMA_C2HCMD:
 120                         pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
 121                         break;
 122                 case RTL8712_DMA_H2CCMD:
 123                 case RTL8712_DMA_BCNQ:
 124                 case RTL8712_DMA_BMCQ:
 125                 case RTL8712_DMA_MGTQ:
 126                         pipe = usb_sndbulkpipe(pusbd, 0x0d);
 127                         break;
 128                 }
 129         } else if (pdvobj->nr_endpoint == 4) {
 130                 switch (addr) {
 131                 case RTL8712_DMA_BEQ:
 132                         pipe = usb_sndbulkpipe(pusbd, 0x06);
 133                         break;
 134                 case RTL8712_DMA_VOQ:
 135                         pipe = usb_sndbulkpipe(pusbd, 0x04);
 136                         break;
 137                 case RTL8712_DMA_RX0FF:
 138                 case RTL8712_DMA_C2HCMD:
 139                         pipe = usb_rcvbulkpipe(pusbd, 0x03); /* in */
 140                         break;
 141                 case RTL8712_DMA_H2CCMD:
 142                 case RTL8712_DMA_BCNQ:
 143                 case RTL8712_DMA_BMCQ:
 144                 case RTL8712_DMA_MGTQ:
 145                         pipe = usb_sndbulkpipe(pusbd, 0x0d);
 146                         break;
 147                 }
 148         } else
 149            pipe = 0;
 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         int status;
 173         struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
 174         struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
 175         struct io_queue *pio_queue = (struct io_queue *)padapter->pio_queue;
 176         struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
 177         struct usb_device *pusbd = pdvobj->pusbdev;
 178         struct urb *piorw_urb = pintfpriv->piorw_urb;
 179
 180         if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
 181             (padapter->pwrctrlpriv.pnp_bstop_trx))
 182                 return;
 183         /* translate DMA FIFO addr to pipehandle */
 184         pipe = ffaddr2pipehdl(pdvobj, addr);
 185         if (pipe == 0)
 186                 return;
 187         usb_fill_bulk_urb(piorw_urb, pusbd, pipe,
 188                           wmem, cnt, usb_write_mem_complete,
 189                           pio_queue);
 190         status = _usb_submit_urb(piorw_urb, GFP_ATOMIC);
 191         _down_sema(&pintfpriv->io_retevt);
 192 }
 193
 194 static void r8712_usb_read_port_complete(struct urb *purb)
 195 {
 196         uint isevt, *pbuf;
 197         struct recv_buf *precvbuf = (struct recv_buf *)purb->context;
 198         struct _adapter *padapter = (struct _adapter *)precvbuf->adapter;
 199         struct recv_priv *precvpriv = &padapter->recvpriv;
 200
 201         if (padapter->bSurpriseRemoved || padapter->bDriverStopped)
 202                 return;
 203         if (purb->status == 0) { /* SUCCESS */
 204                 if ((purb->actual_length > (MAX_RECVBUF_SZ)) ||
 205                     (purb->actual_length < RXDESC_SIZE)) {
 206                         precvbuf->reuse = true;
 207                         r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 208                                   (unsigned char *)precvbuf);
 209                 } else {
 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                                 precvbuf->reuse = true;
 216                                 r8712_read_port(padapter, precvpriv->ff_hwaddr,
 217                                                 0, (unsigned char *)precvbuf);
 218                         } else {
 219                                 _pkt *pskb = precvbuf->pskb;
 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                         printk(KERN_ERR "r8712u: ERROR: URB IS IN"
 245                                " PROGRESS!/n");
 246                         break;
 247                 default:
 248                         break;
 249                 }
 250         }
 251 }
 252
 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 = (struct _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)
 270                 return _FAIL;
 271         if ((precvbuf->reuse == false) || (precvbuf->pskb == NULL)) {
 272                 precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
 273                 if (NULL != precvbuf->pskb)
 274                         precvbuf->reuse = true;
 275         }
 276         if (precvbuf != NULL) {
 277                 r8712_init_recvbuf(adapter, precvbuf);
 278                 /* re-assign for linux based on skb */
 279                 if ((precvbuf->reuse == false) || (precvbuf->pskb == NULL)) {
 280                         precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
 281                                          MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
 282                         if (precvbuf->pskb == NULL)
 283                                 return _FAIL;
 284                         tmpaddr = (addr_t)precvbuf->pskb->data;
 285                         alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
 286                         skb_reserve(precvbuf->pskb,
 287                                     (RECVBUFF_ALIGN_SZ - alignment));
 288                         precvbuf->phead = precvbuf->pskb->head;
 289                         precvbuf->pdata = precvbuf->pskb->data;
 290                         precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
 291                         precvbuf->pend = skb_end_pointer(precvbuf->pskb);
 292                         precvbuf->pbuf = precvbuf->pskb->data;
 293                 } else { /* reuse skb */
 294                         precvbuf->phead = precvbuf->pskb->head;
 295                         precvbuf->pdata = precvbuf->pskb->data;
 296                         precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
 297                         precvbuf->pend = skb_end_pointer(precvbuf->pskb);
 298                         precvbuf->pbuf = precvbuf->pskb->data;
 299                         precvbuf->reuse = false;
 300                 }
 301                 purb = precvbuf->purb;
 302                 /* translate DMA FIFO addr to pipehandle */
 303                 pipe = ffaddr2pipehdl(pdvobj, addr);
 304                 usb_fill_bulk_urb(purb, pusbd, pipe,
 305                                   precvbuf->pbuf, MAX_RECVBUF_SZ,
 306                                   r8712_usb_read_port_complete,
 307                                   precvbuf);
 308                 err = _usb_submit_urb(purb, GFP_ATOMIC);
 309                 if ((err) && (err != (-EPERM)))
 310                         ret = _FAIL;
 311         } else
 312                 ret = _FAIL;
 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         while (1) {
 336                 if ((padapter->bDriverStopped == true) ||
 337                     (padapter->bSurpriseRemoved == true)) {
 338                         printk(KERN_ERR "r8712u: xmit_bh => bDriverStopped"
 339                                " or bSurpriseRemoved\n");
 340                         break;
 341                 }
 342                 ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
 343                 if (ret == false)
 344                         break;
 345         }
 346 }
 347
 348 static void usb_write_port_complete(struct urb *purb)
 349 {
 350         int i;
 351         struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
 352         struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
 353         struct _adapter *padapter = pxmitframe->padapter;
 354         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 355         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 356
 357         switch (pattrib->priority) {
 358         case 1:
 359         case 2:
 360                 pxmitpriv->bkq_cnt--;
 361                 break;
 362         case 4:
 363         case 5:
 364                 pxmitpriv->viq_cnt--;
 365                 break;
 366         case 6:
 367         case 7:
 368                 pxmitpriv->voq_cnt--;
 369                 break;
 370         case 0:
 371         case 3:
 372         default:
 373                 pxmitpriv->beq_cnt--;
 374                 break;
 375         }
 376         pxmitpriv->txirp_cnt--;
 377         for (i = 0; i < 8; i++) {
 378                 if (purb == pxmitframe->pxmit_urb[i]) {
 379                         pxmitframe->bpending[i] = false;
 380                         break;
 381                 }
 382         }
 383         if (padapter->bSurpriseRemoved)
 384                 return;
 385         switch (purb->status) {
 386         case 0:
 387                 break;
 388         default:
 389                 printk(KERN_WARNING "r8712u: pipe error: (%d)\n", purb->status);
 390                 break;
 391         }
 392         /* not to consider tx fragment */
 393         r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
 394         r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
 395         tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 396 }
 397
 398 u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 399 {
 400         unsigned long irqL;
 401         int i, status;
 402         unsigned int pipe;
 403         u32 ret, bwritezero;
 404         struct urb *purb = NULL;
 405         struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
 406         struct dvobj_priv *pdvobj = (struct dvobj_priv   *)&padapter->dvobjpriv;
 407         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 408         struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
 409         struct usb_device *pusbd = pdvobj->pusbdev;
 410         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 411
 412         if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
 413             (padapter->pwrctrlpriv.pnp_bstop_trx))
 414                 return _FAIL;
 415         for (i = 0; i < 8; i++) {
 416                 if (pxmitframe->bpending[i] == false) {
 417                         spin_lock_irqsave(&pxmitpriv->lock, irqL);
 418                         pxmitpriv->txirp_cnt++;
 419                         pxmitframe->bpending[i]  = true;
 420                         switch (pattrib->priority) {
 421                         case 1:
 422                         case 2:
 423                                 pxmitpriv->bkq_cnt++;
 424                                 break;
 425                         case 4:
 426                         case 5:
 427                                 pxmitpriv->viq_cnt++;
 428                                 break;
 429                         case 6:
 430                         case 7:
 431                                 pxmitpriv->voq_cnt++;
 432                                 break;
 433                         case 0:
 434                         case 3:
 435                         default:
 436                                 pxmitpriv->beq_cnt++;
 437                                 break;
 438                         }
 439                         spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
 440                         pxmitframe->sz[i] = (u16)cnt;
 441                         purb = pxmitframe->pxmit_urb[i];
 442                         break;
 443                 }
 444         }
 445         bwritezero = false;
 446         if (pdvobj->ishighspeed) {
 447                 if (cnt > 0 && cnt % 512 == 0)
 448                         bwritezero = true;
 449         } else {
 450                 if (cnt > 0 && cnt % 64 == 0)
 451                         bwritezero = true;
 452         }
 453         /* translate DMA FIFO addr to pipehandle */
 454         pipe = ffaddr2pipehdl(pdvobj, addr);
 455         if (pxmitpriv->free_xmitbuf_cnt%NR_XMITBUFF == 0)
 456                 purb->transfer_flags  &=  (~URB_NO_INTERRUPT);
 457         else
 458                 purb->transfer_flags  |=  URB_NO_INTERRUPT;
 459         if (bwritezero)
 460                 cnt += 8;
 461         usb_fill_bulk_urb(purb, pusbd, pipe,
 462                           pxmitframe->mem_addr,
 463                           cnt, usb_write_port_complete,
 464                           pxmitframe); /* context is xmit_frame */
 465         status = _usb_submit_urb(purb, GFP_ATOMIC);
 466         if (!status)
 467                 ret = _SUCCESS;
 468         else
 469                 ret = _FAIL;
 470         return ret;
 471 }
 472
 473 void r8712_usb_write_port_cancel(struct _adapter *padapter)
 474 {
 475         int i, j;
 476         struct xmit_buf *pxmitbuf = (struct xmit_buf *)
 477                                      padapter->xmitpriv.pxmitbuf;
 478
 479         for (i = 0; i < NR_XMITBUFF; i++) {
 480                 for (j = 0; j < 8; j++) {
 481                         if (pxmitbuf->pxmit_urb[j])
 482                                 usb_kill_urb(pxmitbuf->pxmit_urb[j]);
 483                 }
 484                 pxmitbuf++;
 485         }
 486 }
 487
 488 int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
 489                       u16 index, void *pdata, u16 len, u8 requesttype)
 490 {
 491         unsigned int pipe;
 492         int status;
 493         u8 reqtype;
 494         struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
 495                                          pintfpriv->intf_dev;
 496         struct usb_device *udev = pdvobjpriv->pusbdev;
 497         /* For mstar platform, mstar suggests the address for USB IO
 498          * should be 16 bytes alignment. Trying to fix it here.
 499          */
 500         u8 *palloc_buf, *pIo_buf;
 501
 502         palloc_buf = _malloc((u32) len + 16);
 503         if (palloc_buf == NULL) {
 504                 printk(KERN_ERR "r8712u: [%s] Can't alloc memory for vendor"
 505                        " request\n", __func__);
 506                 return -1;
 507         }
 508         pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
 509         if (requesttype == 0x01) {
 510                 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 511                 reqtype =  RTL871X_VENQT_READ;
 512         } else {
 513                 pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 514                 reqtype =  RTL871X_VENQT_WRITE;
 515                 memcpy(pIo_buf, pdata, len);
 516         }
 517         status = usb_control_msg(udev, pipe, request, reqtype, value, index,
 518                                  pIo_buf, len, HZ / 2);
 519         if (status > 0) {  /* Success this control transfer. */
 520                 if (requesttype == 0x01) {
 521                         /* For Control read transfer, we have to copy the read
 522                          * data from pIo_buf to pdata.
 523                          */
 524                         memcpy(pdata, pIo_buf,  status);
 525                 }
 526         }
 527         kfree(palloc_buf);
 528         return status;
 529 }