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        init_completion(&pintfpriv->io_retevt_comp);
  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        complete(&pintfpriv->io_retevt_comp);
 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        wait_for_completion_interruptible(&pintfpriv->io_retevt_comp);
 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                        r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 206                                  (unsigned char *)precvbuf);
 207                } else {
 208                        _pkt *pskb = precvbuf->pskb;
 209
 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                                skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
 216                                r8712_read_port(padapter, precvpriv->ff_hwaddr,
 217                                                0, (unsigned char *)precvbuf);
 218                        } else {
 219                                skb_put(pskb, purb->actual_length);
 220                                skb_queue_tail(&precvpriv->rx_skb_queue, pskb);
 221                                tasklet_hi_schedule(&precvpriv->recv_tasklet);
 222                                r8712_read_port(padapter, precvpriv->ff_hwaddr,
 223                                                0, (unsigned char *)precvbuf);
 224                        }
 225                }
 226        } else {
 227                switch (purb->status) {
 228                case -EINVAL:
 229                case -EPIPE:
 230                case -ENODEV:
 231                case -ESHUTDOWN:
 232                        padapter->bDriverStopped = true;
 233                        break;
 234                case -ENOENT:
 235                        if (!padapter->bSuspended) {
 236                                padapter->bDriverStopped = true;
 237                                break;
 238                        }
 239                        /* Fall through. */
 240                case -EPROTO:
 241                        r8712_read_port(padapter, precvpriv->ff_hwaddr, 0,
 242                                  (unsigned char *)precvbuf);
 243                        break;
 244                case -EINPROGRESS:
 245                        netdev_err(padapter->pnetdev, "ERROR: URB IS IN PROGRESS!\n");
 246                        break;
 247                default:
 248                        break;
 249                }
 250        }
 251}
 252
 253u32 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 = 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 || !precvbuf)
 270                return _FAIL;
 271        r8712_init_recvbuf(adapter, precvbuf);
 272        /* Try to use skb from the free queue */
 273        precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
 274
 275        if (!precvbuf->pskb) {
 276                precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev,
 277                                 MAX_RECVBUF_SZ + RECVBUFF_ALIGN_SZ);
 278                if (!precvbuf->pskb)
 279                        return _FAIL;
 280                tmpaddr = (addr_t)precvbuf->pskb->data;
 281                alignment = tmpaddr & (RECVBUFF_ALIGN_SZ - 1);
 282                skb_reserve(precvbuf->pskb,
 283                            (RECVBUFF_ALIGN_SZ - alignment));
 284                precvbuf->phead = precvbuf->pskb->head;
 285                precvbuf->pdata = precvbuf->pskb->data;
 286                precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
 287                precvbuf->pend = skb_end_pointer(precvbuf->pskb);
 288                precvbuf->pbuf = precvbuf->pskb->data;
 289        } else { /* skb is reused */
 290                precvbuf->phead = precvbuf->pskb->head;
 291                precvbuf->pdata = precvbuf->pskb->data;
 292                precvbuf->ptail = skb_tail_pointer(precvbuf->pskb);
 293                precvbuf->pend = skb_end_pointer(precvbuf->pskb);
 294                precvbuf->pbuf = precvbuf->pskb->data;
 295        }
 296        purb = precvbuf->purb;
 297        /* translate DMA FIFO addr to pipehandle */
 298        pipe = ffaddr2pipehdl(pdvobj, addr);
 299        usb_fill_bulk_urb(purb, pusbd, pipe,
 300                          precvbuf->pbuf, MAX_RECVBUF_SZ,
 301                          r8712_usb_read_port_complete,
 302                          precvbuf);
 303        err = usb_submit_urb(purb, GFP_ATOMIC);
 304        if ((err) && (err != (-EPERM)))
 305                ret = _FAIL;
 306        return ret;
 307}
 308
 309void r8712_usb_read_port_cancel(struct _adapter *padapter)
 310{
 311        int i;
 312        struct recv_buf *precvbuf;
 313
 314        precvbuf = (struct recv_buf *)padapter->recvpriv.precv_buf;
 315        for (i = 0; i < NR_RECVBUFF; i++) {
 316                if (precvbuf->purb)
 317                        usb_kill_urb(precvbuf->purb);
 318                precvbuf++;
 319        }
 320}
 321
 322void r8712_xmit_bh(void *priv)
 323{
 324        int ret = false;
 325        struct _adapter *padapter = priv;
 326        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 327
 328        if (padapter->bDriverStopped ||
 329            padapter->bSurpriseRemoved) {
 330                netdev_err(padapter->pnetdev, "xmit_bh => bDriverStopped or bSurpriseRemoved\n");
 331                return;
 332        }
 333        ret = r8712_xmitframe_complete(padapter, pxmitpriv, NULL);
 334        if (!ret)
 335                return;
 336        tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 337}
 338
 339static void usb_write_port_complete(struct urb *purb)
 340{
 341        int i;
 342        struct xmit_frame *pxmitframe = (struct xmit_frame *)purb->context;
 343        struct xmit_buf *pxmitbuf = pxmitframe->pxmitbuf;
 344        struct _adapter *padapter = pxmitframe->padapter;
 345        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 346        struct pkt_attrib *pattrib = &pxmitframe->attrib;
 347
 348        switch (pattrib->priority) {
 349        case 1:
 350        case 2:
 351                pxmitpriv->bkq_cnt--;
 352                break;
 353        case 4:
 354        case 5:
 355                pxmitpriv->viq_cnt--;
 356                break;
 357        case 6:
 358        case 7:
 359                pxmitpriv->voq_cnt--;
 360                break;
 361        case 0:
 362        case 3:
 363        default:
 364                pxmitpriv->beq_cnt--;
 365                break;
 366        }
 367        pxmitpriv->txirp_cnt--;
 368        for (i = 0; i < 8; i++) {
 369                if (purb == pxmitframe->pxmit_urb[i]) {
 370                        pxmitframe->bpending[i] = false;
 371                        break;
 372                }
 373        }
 374        if (padapter->bSurpriseRemoved)
 375                return;
 376        switch (purb->status) {
 377        case 0:
 378                break;
 379        default:
 380                netdev_warn(padapter->pnetdev,
 381                                "r8712u: pipe error: (%d)\n", purb->status);
 382                break;
 383        }
 384        /* not to consider tx fragment */
 385        r8712_free_xmitframe_ex(pxmitpriv, pxmitframe);
 386        r8712_free_xmitbuf(pxmitpriv, pxmitbuf);
 387        tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 388}
 389
 390u32 r8712_usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 391{
 392        unsigned long irqL;
 393        int i, status;
 394        unsigned int pipe;
 395        u32 ret, bwritezero;
 396        struct urb *purb = NULL;
 397        struct _adapter *padapter = (struct _adapter *)pintfhdl->adapter;
 398        struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
 399        struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 400        struct xmit_frame *pxmitframe = (struct xmit_frame *)wmem;
 401        struct usb_device *pusbd = pdvobj->pusbdev;
 402        struct pkt_attrib *pattrib = &pxmitframe->attrib;
 403
 404        if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
 405            (padapter->pwrctrlpriv.pnp_bstop_trx))
 406                return _FAIL;
 407        for (i = 0; i < 8; i++) {
 408                if (!pxmitframe->bpending[i]) {
 409                        spin_lock_irqsave(&pxmitpriv->lock, irqL);
 410                        pxmitpriv->txirp_cnt++;
 411                        pxmitframe->bpending[i]  = true;
 412                        switch (pattrib->priority) {
 413                        case 1:
 414                        case 2:
 415                                pxmitpriv->bkq_cnt++;
 416                                break;
 417                        case 4:
 418                        case 5:
 419                                pxmitpriv->viq_cnt++;
 420                                break;
 421                        case 6:
 422                        case 7:
 423                                pxmitpriv->voq_cnt++;
 424                                break;
 425                        case 0:
 426                        case 3:
 427                        default:
 428                                pxmitpriv->beq_cnt++;
 429                                break;
 430                        }
 431                        spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
 432                        pxmitframe->sz[i] = (u16)cnt;
 433                        purb = pxmitframe->pxmit_urb[i];
 434                        break;
 435                }
 436        }
 437        bwritezero = false;
 438        if (pdvobj->ishighspeed) {
 439                if (cnt > 0 && cnt % 512 == 0)
 440                        bwritezero = true;
 441        } else {
 442                if (cnt > 0 && cnt % 64 == 0)
 443                        bwritezero = true;
 444        }
 445        /* translate DMA FIFO addr to pipehandle */
 446        pipe = ffaddr2pipehdl(pdvobj, addr);
 447        if (pxmitpriv->free_xmitbuf_cnt % NR_XMITBUFF == 0)
 448                purb->transfer_flags  &=  (~URB_NO_INTERRUPT);
 449        else
 450                purb->transfer_flags  |=  URB_NO_INTERRUPT;
 451        if (bwritezero)
 452                cnt += 8;
 453        usb_fill_bulk_urb(purb, pusbd, pipe,
 454                          pxmitframe->mem_addr,
 455                          cnt, usb_write_port_complete,
 456                          pxmitframe); /* context is xmit_frame */
 457        status = usb_submit_urb(purb, GFP_ATOMIC);
 458        if (!status)
 459                ret = _SUCCESS;
 460        else
 461                ret = _FAIL;
 462        return ret;
 463}
 464
 465void r8712_usb_write_port_cancel(struct _adapter *padapter)
 466{
 467        int i, j;
 468        struct xmit_buf *pxmitbuf = (struct xmit_buf *)
 469                                     padapter->xmitpriv.pxmitbuf;
 470
 471        for (i = 0; i < NR_XMITBUFF; i++) {
 472                for (j = 0; j < 8; j++) {
 473                        if (pxmitbuf->pxmit_urb[j])
 474                                usb_kill_urb(pxmitbuf->pxmit_urb[j]);
 475                }
 476                pxmitbuf++;
 477        }
 478}
 479
 480int r8712_usbctrl_vendorreq(struct intf_priv *pintfpriv, u8 request, u16 value,
 481                      u16 index, void *pdata, u16 len, u8 requesttype)
 482{
 483        unsigned int pipe;
 484        int status;
 485        u8 reqtype;
 486        struct dvobj_priv *pdvobjpriv = (struct dvobj_priv *)
 487                                         pintfpriv->intf_dev;
 488        struct usb_device *udev = pdvobjpriv->pusbdev;
 489        /* For mstar platform, mstar suggests the address for USB IO
 490         * should be 16 bytes alignment. Trying to fix it here.
 491         */
 492        u8 *palloc_buf, *pIo_buf;
 493
 494        palloc_buf = kmalloc((u32)len + 16, GFP_ATOMIC);
 495        if (!palloc_buf)
 496                return -ENOMEM;
 497        pIo_buf = palloc_buf + 16 - ((addr_t)(palloc_buf) & 0x0f);
 498        if (requesttype == 0x01) {
 499                pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 500                reqtype =  RTL871X_VENQT_READ;
 501        } else {
 502                pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 503                reqtype =  RTL871X_VENQT_WRITE;
 504                memcpy(pIo_buf, pdata, len);
 505        }
 506        status = usb_control_msg(udev, pipe, request, reqtype, value, index,
 507                                 pIo_buf, len, HZ / 2);
 508        if (status > 0) {  /* Success this control transfer. */
 509                if (requesttype == 0x01) {
 510                        /* For Control read transfer, we have to copy the read
 511                         * data from pIo_buf to pdata.
 512                         */
 513                        memcpy(pdata, pIo_buf,  status);
 514                }
 515        }
 516        kfree(palloc_buf);
 517        return status;
 518}
 519