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        return pipe;
 150}
 151
 152static void usb_write_mem_complete(struct urb *purb)
 153{
 154        struct io_queue *pio_q = (struct io_queue *)purb->context;
 155        struct intf_hdl *pintf = &(pio_q->intf);
 156        struct intf_priv *pintfpriv = pintf->pintfpriv;
 157        struct _adapter *padapter = (struct _adapter *)pintf->adapter;
 158
 159        if (purb->status != 0) {
 160                if (purb->status == (-ESHUTDOWN))
 161                        padapter->bDriverStopped = true;
 162                else
 163                        padapter->bSurpriseRemoved = true;
 164        }
 165        up(&pintfpriv->io_retevt);
 166}
 167
 168void r8712_usb_write_mem(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 169{
 170        unsigned int pipe;
 171        struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
 172        struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
 173        struct io_queue *pio_queue = (struct io_queue *)padapter->pio_queue;
 174        struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
 175        struct usb_device *pusbd = pdvobj->pusbdev;
 176        struct urb *piorw_urb = pintfpriv->piorw_urb;
 177
 178        if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
 179            (padapter->pwrctrlpriv.pnp_bstop_trx))
 180                return;
 181        /* translate DMA FIFO addr to pipehandle */
 182        pipe = ffaddr2pipehdl(pdvobj, addr);
 183        if (pipe == 0)
 184                return;
 185        usb_fill_bulk_urb(piorw_urb, pusbd, pipe,
 186                          wmem, cnt, usb_write_mem_complete,
 187                          pio_queue);
 188        usb_submit_urb(piorw_urb, GFP_ATOMIC);
 189        _down_sema(&pintfpriv->io_retevt);
 190}
 191
 192static void r8712_usb_read_port_complete(struct urb *purb)
 193{
 194        uint isevt, *pbuf;
 195        struct recv_buf *precvbuf = (struct recv_buf *)purb->context;
 196        struct _adapter *padapter = (struct _adapter *)precvbuf->adapter;
 197        struct recv_priv *precvpriv = &padapter->recvpriv;
 198
 199        if (padapter->bSurpriseRemoved || padapter->bDriverStopped)
 200                return;
 201        if (purb->status == 0) { /* SUCCESS */
 202                if ((purb->actual_length > (MAX_RECVBUF_SZ)) ||
 203                    (purb->actual_length < RXDESC_SIZE)) {
 204                        precvbuf->reuse = true;
 205                        r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 206                                  (unsigned char *)precvbuf);
 207                } else {
 208                        precvbuf->transfer_len = purb->actual_length;
 209                        pbuf = (uint *)precvbuf->pbuf;
 210                        isevt = le32_to_cpu(*(pbuf + 1)) & 0x1ff;
 211                        if ((isevt & 0x1ff) == 0x1ff) {
 212                                r8712_rxcmd_event_hdl(padapter, pbuf);
 213                                precvbuf->reuse = true;
 214                                r8712_read_port(padapter, precvpriv->ff_hwaddr,
 215                                                0, (unsigned char *)precvbuf);
 216                        } else {
 217                                _pkt *pskb = precvbuf->pskb;
 218
 219                                skb_put(pskb, purb->actual_length);
 220                                skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
 221                                tasklet_hi_schedule(&precvpriv->recv_tasklet);
 222                                precvbuf->pskb = NULL;
 223                                precvbuf->reuse = false;
 224                                r8712_read_port(padapter, precvpriv->ff_hwaddr,
 225                                                0, (unsigned char *)precvbuf);
 226                        }
 227                }
 228        } else {
 229                switch (purb->status) {
 230                case -EINVAL:
 231                case -EPIPE:
 232                case -ENODEV:
 233                case -ESHUTDOWN:
 234                case -ENOENT:
 235                        padapter->bDriverStopped = true;
 236                        break;
 237                case -EPROTO:
 238                        precvbuf->reuse = true;
 239                        r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 240                                  (unsigned char *)precvbuf);
 241                        break;
 242                case -EINPROGRESS:
 243                        netdev_err(padapter->pnetdev, "ERROR: URB IS IN PROGRESS!\n");
 244                        break;
 245                default:
 246                        break;
 247                }
 248        }
 249}
 250
 251u32 r8712_usb_read_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *rmem)
 252{
 253        unsigned int pipe;
 254        int err;
 255        u32 tmpaddr = 0;
 256        int alignment = 0;
 257        u32 ret = _SUCCESS;
 258        struct urb *purb = NULL;
 259        struct recv_buf *precvbuf = (struct recv_buf *)rmem;
 260        struct intf_priv *pintfpriv = pintfhdl->pintfpriv;
 261        struct dvobj_priv *pdvobj = (struct dvobj_priv *)pintfpriv->intf_dev;
 262        struct _adapter *adapter = (struct _adapter *)pdvobj->padapter;
 263        struct recv_priv *precvpriv = &adapter->recvpriv;
 264        struct usb_device *pusbd = pdvobj->pusbdev;
 265
 266        if (adapter->bDriverStopped || adapter->bSurpriseRemoved ||
 267            adapter->pwrctrlpriv.pnp_bstop_trx)
 268                return _FAIL;
 269        if (!precvbuf->reuse == false || !precvbuf->pskb) {
 270                precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
 271                if (NULL != precvbuf->pskb)
 272                        precvbuf->reuse = true;
 273        }
 274        if (precvbuf != NULL) {
 275                r8712_init_recvbuf(adapter, precvbuf);
 276                /* re-assign for linux based on skb */
 277                if (!precvbuf->reuse || !precvbuf->pskb) {
 278                        precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
 279                                         MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
 280                        if (!precvbuf->pskb)
 281                                return _FAIL;
 282                        tmpaddr = (addr_t)precvbuf->pskb->data;
 283                        alignment = tmpaddr & (RECVBUFF_ALIGN_SZ-1);
 284                        skb_reserve(precvbuf->pskb,
 285                                    (RECVBUFF_ALIGN_SZ - alignment));
 286                        precvbuf->phead = precvbuf->pskb->head;
 287                        precvbuf->pdata = precvbuf->pskb->data;
 288                        precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
 289                        precvbuf->pend = skb_end_pointer(precvbuf->pskb);
 290                        precvbuf->pbuf = precvbuf->pskb->data;
 291                } else { /* reuse skb */
 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                        precvbuf->reuse = false;
 298                }
 299                purb = precvbuf->purb;
 300                /* translate DMA FIFO addr to pipehandle */
 301                pipe = ffaddr2pipehdl(pdvobj, addr);
 302                usb_fill_bulk_urb(purb, pusbd, pipe,
 303                                  precvbuf->pbuf, MAX_RECVBUF_SZ,
 304                                  r8712_usb_read_port_complete,
 305                                  precvbuf);
 306                err = usb_submit_urb(purb, GFP_ATOMIC);
 307                if ((err) && (err != (-EPERM)))
 308                        ret = _FAIL;
 309        } else
 310                ret = _FAIL;
 311        return ret;
 312}
 313
 314void r8712_usb_read_port_cancel(struct _adapter *padapter)
 315{
 316        int i;
 317        struct recv_buf *precvbuf;
 318
 319        precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
 320        for (i = 0; i < NR_RECVBUFF; i++) {
 321                if (precvbuf->purb)
 322                        usb_kill_urb(precvbuf->purb);
 323                precvbuf++;
 324        }
 325}
 326
 327void r8712_xmit_bh(void *priv)
 328{
 329        int ret = false;
 330        struct _adapter *padapter = (struct _adapter *)priv;
 331        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 332
 333        if ((padapter->bDriverStopped == true) ||
 334            (padapter->bSurpriseRemoved == true)) {
 335                netdev_err(padapter->pnetdev, "xmit_bh => bDriverStopped or bSurpriseRemoved\n");
 336                return;
 337        }
 338        ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
 339        if (ret == false)
 340                return;
 341        tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 342}
 343
 344static void usb_write_port_complete(struct urb *purb)
 345{
 346        int i;
 347        struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
 348        struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
 349        struct _adapter *padapter = pxmitframe->padapter;
 350        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 351        struct pkt_attrib *pattrib = &pxmitframe->attrib;
 352
 353        switch (pattrib->priority) {
 354        case 1:
 355        case 2:
 356                pxmitpriv->bkq_cnt--;
 357                break;
 358        case 4:
 359        case 5:
 360                pxmitpriv->viq_cnt--;
 361                break;
 362        case 6:
 363        case 7:
 364                pxmitpriv->voq_cnt--;
 365                break;
 366        case 0:
 367        case 3:
 368        default:
 369                pxmitpriv->beq_cnt--;
 370                break;
 371        }
 372        pxmitpriv->txirp_cnt--;
 373        for (i = 0; i < 8; i++) {
 374                if (purb == pxmitframe->pxmit_urb[i]) {
 375                        pxmitframe->bpending[i] = false;
 376                        break;
 377                }
 378        }
 379        if (padapter->bSurpriseRemoved)
 380                return;
 381        switch (purb->status) {
 382        case 0:
 383                break;
 384        default:
 385                netdev_warn(padapter->pnetdev,
 386                                "r8712u: pipe error: (%d)\n", purb->status);
 387                break;
 388        }
 389        /* not to consider tx fragment */
 390        r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
 391        r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
 392        tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 393}
 394
 395u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 396{
 397        unsigned long irqL;
 398        int i, status;
 399        unsigned int pipe;
 400        u32 ret, bwritezero;
 401        struct urb *purb = NULL;
 402        struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
 403        struct dvobj_priv *pdvobj = (struct dvobj_priv   *)&padapter->dvobjpriv;
 404        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 405        struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
 406        struct usb_device *pusbd = pdvobj->pusbdev;
 407        struct pkt_attrib *pattrib = &pxmitframe->attrib;
 408
 409        if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
 410            (padapter->pwrctrlpriv.pnp_bstop_trx))
 411                return _FAIL;
 412        for (i = 0; i < 8; i++) {
 413                if (pxmitframe->bpending[i] == false) {
 414                        spin_lock_irqsave(&pxmitpriv->lock, irqL);
 415                        pxmitpriv->txirp_cnt++;
 416                        pxmitframe->bpending[i]  = true;
 417                        switch (pattrib->priority) {
 418                        case 1:
 419                        case 2:
 420                                pxmitpriv->bkq_cnt++;
 421                                break;
 422                        case 4:
 423                        case 5:
 424                                pxmitpriv->viq_cnt++;
 425                                break;
 426                        case 6:
 427                        case 7:
 428                                pxmitpriv->voq_cnt++;
 429                                break;
 430                        case 0:
 431                        case 3:
 432                        default:
 433                                pxmitpriv->beq_cnt++;
 434                                break;
 435                        }
 436                        spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
 437                        pxmitframe->sz[i] = (u16)cnt;
 438                        purb = pxmitframe->pxmit_urb[i];
 439                        break;
 440                }
 441        }
 442        bwritezero = false;
 443        if (pdvobj->ishighspeed) {
 444                if (cnt > 0 && cnt % 512 == 0)
 445                        bwritezero = true;
 446        } else {
 447                if (cnt > 0 && cnt % 64 == 0)
 448                        bwritezero = true;
 449        }
 450        /* translate DMA FIFO addr to pipehandle */
 451        pipe = ffaddr2pipehdl(pdvobj, addr);
 452        if (pxmitpriv->free_xmitbuf_cnt%NR_XMITBUFF == 0)
 453                purb->transfer_flags  &=  (~URB_NO_INTERRUPT);
 454        else
 455                purb->transfer_flags  |=  URB_NO_INTERRUPT;
 456        if (bwritezero)
 457                cnt += 8;
 458        usb_fill_bulk_urb(purb, pusbd, pipe,
 459                          pxmitframe->mem_addr,
 460                          cnt, usb_write_port_complete,
 461                          pxmitframe); /* context is xmit_frame */
 462        status = usb_submit_urb(purb, GFP_ATOMIC);
 463        if (!status)
 464                ret = _SUCCESS;
 465        else
 466                ret = _FAIL;
 467        return ret;
 468}
 469
 470void r8712_usb_write_port_cancel(struct _adapter *padapter)
 471{
 472        int i, j;
 473        struct xmit_buf *pxmitbuf = (struct xmit_buf *)
 474                                     padapter->xmitpriv.pxmitbuf;
 475
 476        for (i = 0; i < NR_XMITBUFF; i++) {
 477                for (j = 0; j < 8; j++) {
 478                        if (pxmitbuf->pxmit_urb[j])
 479                                usb_kill_urb(pxmitbuf->pxmit_urb[j]);
 480                }
 481                pxmitbuf++;
 482        }
 483}
 484
 485int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
 486                      u16 index, void *pdata, u16 len, u8 requesttype)
 487{
 488        unsigned int pipe;
 489        int status;
 490        u8 reqtype;
 491        struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
 492                                         pintfpriv->intf_dev;
 493        struct usb_device *udev = pdvobjpriv->pusbdev;
 494        /* For mstar platform, mstar suggests the address for USB IO
 495         * should be 16 bytes alignment. Trying to fix it here.
 496         */
 497        u8 *palloc_buf, *pIo_buf;
 498
 499        palloc_buf = kmalloc((u32)len + 16, GFP_ATOMIC);
 500        if (palloc_buf == NULL)
 501                return -ENOMEM;
 502        pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
 503        if (requesttype == 0x01) {
 504                pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 505                reqtype =  RTL871X_VENQT_READ;
 506        } else {
 507                pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 508                reqtype =  RTL871X_VENQT_WRITE;
 509                memcpy(pIo_buf, pdata, len);
 510        }
 511        status = usb_control_msg(udev, pipe, request, reqtype, value, index,
 512                                 pIo_buf, len, HZ / 2);
 513        if (status > 0) {  /* Success this control transfer. */
 514                if (requesttype == 0x01) {
 515                        /* For Control read transfer, we have to copy the read
 516                         * data from pIo_buf to pdata.
 517                         */
 518                        memcpy(pdata, pIo_buf,  status);
 519                }
 520        }
 521        kfree(palloc_buf);
 522        return status;
 523}
 524