LXR linux/drivers/staging/rtl8712/usb_ops

   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
  41struct zero_bulkout_context {
  42        void *pbuf;
  43        void *purb;
  44        void *pirp;
  45        void *padapter;
  46};
  47
  48uint 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
  57void 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
  65static 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
 153static 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
 169void 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
 193static 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
 257u32 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
 321void 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
 334void 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
 351static 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
 402u32 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
 477void 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
 492int 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}
 531