drivers/staging/rtl8712/rtl8712_cmd.c

   1 /******************************************************************************
   2  * rtl8712_cmd.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 _RTL8712_CMD_C_
  30
  31 #include <linux/compiler.h>
  32 #include <linux/kernel.h>
  33 #include <linux/errno.h>
  34 #include <linux/init.h>
  35 #include <linux/slab.h>
  36 #include <linux/module.h>
  37 #include <linux/kref.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/usb.h>
  41 #include <linux/usb/ch9.h>
  42 #include <linux/circ_buf.h>
  43 #include <linux/uaccess.h>
  44 #include <asm/byteorder.h>
  45 #include <linux/atomic.h>
  46 #include <linux/semaphore.h>
  47 #include <linux/rtnetlink.h>
  48
  49 #include "osdep_service.h"
  50 #include "drv_types.h"
  51 #include "recv_osdep.h"
  52 #include "mlme_osdep.h"
  53 #include "rtl871x_byteorder.h"
  54 #include "rtl871x_ioctl_set.h"
  55
  56 static void check_hw_pbc(struct _adapter *padapter)
  57 {
  58         u8      tmp1byte;
  59
  60         r8712_write8(padapter, MAC_PINMUX_CTRL, (GPIOMUX_EN | GPIOSEL_GPIO));
  61         tmp1byte = r8712_read8(padapter, GPIO_IO_SEL);
  62         tmp1byte &= ~(HAL_8192S_HW_GPIO_WPS_BIT);
  63         r8712_write8(padapter, GPIO_IO_SEL, tmp1byte);
  64         tmp1byte = r8712_read8(padapter, GPIO_CTRL);
  65         if (tmp1byte == 0xff)
  66                 return ;
  67         if (tmp1byte&HAL_8192S_HW_GPIO_WPS_BIT) {
  68                 /* Here we only set bPbcPressed to true
  69                  * After trigger PBC, the variable will be set to false */
  70                 DBG_8712("CheckPbcGPIO - PBC is pressed !!!!\n");
  71                 /* 0 is the default value and it means the application monitors
  72                  * the HW PBC doesn't privde its pid to driver. */
  73                 if (padapter->pid == 0)
  74                         return;
  75                 kill_pid(find_vpid(padapter->pid), SIGUSR1, 1);
  76         }
  77 }
  78
  79 /* query rx phy status from fw.
  80  * Adhoc mode: beacon.
  81  * Infrastructure mode: beacon , data. */
  82 static void query_fw_rx_phy_status(struct _adapter *padapter)
  83 {
  84         u32 val32 = 0;
  85         int pollingcnts = 50;
  86
  87         if (check_fwstate(&padapter->mlmepriv, _FW_LINKED) == true) {
  88                 r8712_write32(padapter, IOCMD_CTRL_REG, 0xf4000001);
  89                 msleep(100);
  90                 /* Wait FW complete IO Cmd */
  91                 while ((r8712_read32(padapter, IOCMD_CTRL_REG)) &&
  92                        (pollingcnts > 0)) {
  93                         pollingcnts--;
  94                         msleep(20);
  95                 }
  96                 if (pollingcnts != 0)
  97                         val32 = r8712_read32(padapter, IOCMD_DATA_REG);
  98                 else /* time out */
  99                         val32 = 0;
 100                 val32 = val32 >> 4;
 101                 padapter->recvpriv.fw_rssi =
 102                          (u8)r8712_signal_scale_mapping(val32);
 103         }
 104 }
 105
 106 /* check mlme, hw, phy, or dynamic algorithm status. */
 107 static void StatusWatchdogCallback(struct _adapter *padapter)
 108 {
 109         check_hw_pbc(padapter);
 110         query_fw_rx_phy_status(padapter);
 111 }
 112
 113 static void r871x_internal_cmd_hdl(struct _adapter *padapter, u8 *pbuf)
 114 {
 115         struct drvint_cmd_parm *pdrvcmd;
 116
 117         if (!pbuf)
 118                 return;
 119         pdrvcmd = (struct drvint_cmd_parm *)pbuf;
 120         switch (pdrvcmd->i_cid) {
 121         case WDG_WK_CID:
 122                 StatusWatchdogCallback(padapter);
 123                 break;
 124         default:
 125                 break;
 126         }
 127         kfree(pdrvcmd->pbuf);
 128 }
 129
 130 static u8 read_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
 131 {
 132         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj      *pcmd);
 133         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 134
 135         /*  invoke cmd->callback function */
 136         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 137         if (pcmd_callback == NULL)
 138                 r8712_free_cmd_obj(pcmd);
 139         else
 140                 pcmd_callback(padapter, pcmd);
 141         return H2C_SUCCESS;
 142 }
 143
 144 static u8 write_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
 145 {
 146         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj      *pcmd);
 147         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 148
 149         /*  invoke cmd->callback function */
 150         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 151         if (pcmd_callback == NULL)
 152                 r8712_free_cmd_obj(pcmd);
 153         else
 154                 pcmd_callback(padapter, pcmd);
 155         return H2C_SUCCESS;
 156 }
 157
 158 static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 159 {
 160         u32 val;
 161         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj      *pcmd);
 162         struct readBB_parm *prdbbparm;
 163         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 164
 165         prdbbparm = (struct readBB_parm *)pcmd->parmbuf;
 166         if (pcmd->rsp && pcmd->rspsz > 0)
 167                 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
 168         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 169         if (pcmd_callback == NULL)
 170                 r8712_free_cmd_obj(pcmd);
 171         else
 172                 pcmd_callback(padapter, pcmd);
 173         return H2C_SUCCESS;
 174 }
 175
 176 static u8 write_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 177 {
 178         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 179         struct writeBB_parm *pwritebbparm;
 180         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 181
 182         pwritebbparm = (struct writeBB_parm *)pcmd->parmbuf;
 183         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 184         if (pcmd_callback == NULL)
 185                 r8712_free_cmd_obj(pcmd);
 186         else
 187                 pcmd_callback(padapter, pcmd);
 188         return H2C_SUCCESS;
 189 }
 190
 191 static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 192 {
 193         u32 val;
 194         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 195         struct readRF_parm *prdrfparm;
 196         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 197
 198         prdrfparm = (struct readRF_parm *)pcmd->parmbuf;
 199         if (pcmd->rsp && pcmd->rspsz > 0)
 200                 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
 201         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 202         if (pcmd_callback == NULL)
 203                 r8712_free_cmd_obj(pcmd);
 204         else
 205                 pcmd_callback(padapter, pcmd);
 206         return H2C_SUCCESS;
 207 }
 208
 209 static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 210 {
 211         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 212         struct writeRF_parm *pwriterfparm;
 213         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 214
 215         pwriterfparm = (struct writeRF_parm *)pcmd->parmbuf;
 216         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 217         if (pcmd_callback == NULL)
 218                 r8712_free_cmd_obj(pcmd);
 219         else
 220                 pcmd_callback(padapter, pcmd);
 221         return H2C_SUCCESS;
 222 }
 223
 224 static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
 225 {
 226         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 227         struct usb_suspend_parm *psetusbsuspend;
 228
 229         psetusbsuspend = (struct usb_suspend_parm *)pcmd->parmbuf;
 230         r8712_free_cmd_obj(pcmd);
 231         return H2C_SUCCESS;
 232 }
 233
 234 static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
 235                                       struct cmd_obj *pcmd)
 236 {
 237         struct cmd_obj *pcmd_r;
 238
 239         if (pcmd == NULL)
 240                 return pcmd;
 241         pcmd_r = NULL;
 242
 243         switch (pcmd->cmdcode) {
 244         case GEN_CMD_CODE(_Read_MACREG):
 245                 read_macreg_hdl(padapter, (u8 *)pcmd);
 246                 pcmd_r = pcmd;
 247                 break;
 248         case GEN_CMD_CODE(_Write_MACREG):
 249                 write_macreg_hdl(padapter, (u8 *)pcmd);
 250                 pcmd_r = pcmd;
 251                 break;
 252         case GEN_CMD_CODE(_Read_BBREG):
 253                 read_bbreg_hdl(padapter, (u8 *)pcmd);
 254                 break;
 255         case GEN_CMD_CODE(_Write_BBREG):
 256                 write_bbreg_hdl(padapter, (u8 *)pcmd);
 257                 break;
 258         case GEN_CMD_CODE(_Read_RFREG):
 259                 read_rfreg_hdl(padapter, (u8 *)pcmd);
 260                 break;
 261         case GEN_CMD_CODE(_Write_RFREG):
 262                 write_rfreg_hdl(padapter, (u8 *)pcmd);
 263                 break;
 264         case GEN_CMD_CODE(_SetUsbSuspend):
 265                 sys_suspend_hdl(padapter, (u8 *)pcmd);
 266                 break;
 267         case GEN_CMD_CODE(_JoinBss):
 268                 r8712_joinbss_reset(padapter);
 269                 /* Before set JoinBss_CMD to FW, driver must ensure FW is in
 270                  * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
 271                  * new pwr_mode to Driver, instead of use workitem to change
 272                  * state. */
 273                 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
 274                         padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
 275                         _enter_pwrlock(&(padapter->pwrctrlpriv.lock));
 276                         r8712_set_rpwm(padapter, PS_STATE_S4);
 277                         up(&(padapter->pwrctrlpriv.lock));
 278                 }
 279                 pcmd_r = pcmd;
 280                 break;
 281         case _DRV_INT_CMD_:
 282                 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
 283                 r8712_free_cmd_obj(pcmd);
 284                 pcmd_r = NULL;
 285                 break;
 286         default:
 287                 pcmd_r = pcmd;
 288                 break;
 289         }
 290         return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
 291 }
 292
 293 static u8 check_cmd_fifo(struct _adapter *padapter, uint sz)
 294 {
 295         u8 res = _SUCCESS;
 296         return res;
 297 }
 298
 299 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
 300 {
 301         int pollingcnts = 50;
 302
 303         r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
 304         msleep(100);
 305         while ((0 != r8712_read32(pAdapter, IOCMD_CTRL_REG)) &&
 306                (pollingcnts > 0)) {
 307                 pollingcnts--;
 308                 msleep(20);
 309         }
 310         if (pollingcnts == 0)
 311                 return false;
 312         return true;
 313 }
 314
 315 void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
 316 {
 317         if (flag == 0)  /* set */
 318                 r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
 319         else            /* query */
 320                 *value = r8712_read32(pAdapter, IOCMD_DATA_REG);
 321 }
 322
 323 int r8712_cmd_thread(void *context)
 324 {
 325         struct cmd_obj *pcmd;
 326         unsigned int cmdsz, wr_sz, *pcmdbuf, *prspbuf;
 327         struct tx_desc *pdesc;
 328         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 329         struct _adapter *padapter = (struct _adapter *)context;
 330         struct  cmd_priv        *pcmdpriv = &(padapter->cmdpriv);
 331
 332         thread_enter(padapter);
 333         while (1) {
 334                 if ((_down_sema(&(pcmdpriv->cmd_queue_sema))) == _FAIL)
 335                         break;
 336                 if ((padapter->bDriverStopped == true) ||
 337                     (padapter->bSurpriseRemoved == true))
 338                         break;
 339                 if (r8712_register_cmd_alive(padapter) != _SUCCESS)
 340                         continue;
 341 _next:
 342                 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
 343                 if (!(pcmd)) {
 344                         r8712_unregister_cmd_alive(padapter);
 345                         continue;
 346                 }
 347                 pcmdbuf = (unsigned int *)pcmdpriv->cmd_buf;
 348                 prspbuf = (unsigned int *)pcmdpriv->rsp_buf;
 349                 pdesc = (struct tx_desc *)pcmdbuf;
 350                 memset(pdesc, 0, TXDESC_SIZE);
 351                 pcmd = cmd_hdl_filter(padapter, pcmd);
 352                 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
 353                         struct dvobj_priv *pdvobj = (struct dvobj_priv *)
 354                                                     &padapter->dvobjpriv;
 355                         u8 blnPending = 0;
 356                         pcmdpriv->cmd_issued_cnt++;
 357                         cmdsz = _RND8((pcmd->cmdsz)); /* _RND8  */
 358                         wr_sz = TXDESC_SIZE + 8 + cmdsz;
 359                         pdesc->txdw0 |= cpu_to_le32((wr_sz-TXDESC_SIZE) &
 360                                                      0x0000ffff);
 361                         if (pdvobj->ishighspeed) {
 362                                 if ((wr_sz % 512) == 0)
 363                                         blnPending = 1;
 364                         } else {
 365                                 if ((wr_sz % 64) == 0)
 366                                         blnPending = 1;
 367                         }
 368                         if (blnPending) /* 32 bytes for TX Desc - 8 offset */
 369                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 370                                                 OFFSET_SZ + 8) << OFFSET_SHT) &
 371                                                 0x00ff0000);
 372                         else {
 373                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 374                                                               OFFSET_SZ) <<
 375                                                               OFFSET_SHT) &
 376                                                               0x00ff0000);
 377                         }
 378                         pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
 379                         pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
 380                                                     0x00001f00);
 381                         pcmdbuf += (TXDESC_SIZE >> 2);
 382                         *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
 383                                                (pcmd->cmdcode << 16) |
 384                                                (pcmdpriv->cmd_seq << 24));
 385                         pcmdbuf += 2 ; /* 8 bytes aligment */
 386                         memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
 387                         while (check_cmd_fifo(padapter, wr_sz) == _FAIL) {
 388                                 if ((padapter->bDriverStopped == true) ||
 389                                     (padapter->bSurpriseRemoved == true))
 390                                         break;
 391                                 msleep(100);
 392                                 continue;
 393                         }
 394                         if (blnPending)
 395                                 wr_sz += 8;   /* Append 8 bytes */
 396                         r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
 397                                        (u8 *)pdesc);
 398                         pcmdpriv->cmd_seq++;
 399                         if (pcmd->cmdcode == GEN_CMD_CODE(_CreateBss)) {
 400                                 pcmd->res = H2C_SUCCESS;
 401                                 pcmd_callback = cmd_callback[pcmd->
 402                                                 cmdcode].callback;
 403                                 if (pcmd_callback)
 404                                         pcmd_callback(padapter, pcmd);
 405                                 continue;
 406                         }
 407                         if (pcmd->cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
 408                                 if (padapter->pwrctrlpriv.bSleep) {
 409                                         _enter_pwrlock(&(padapter->
 410                                                        pwrctrlpriv.lock));
 411                                         r8712_set_rpwm(padapter, PS_STATE_S2);
 412                                         up(&padapter->pwrctrlpriv.lock);
 413                                 }
 414                         }
 415                         r8712_free_cmd_obj(pcmd);
 416                         if (_queue_empty(&(pcmdpriv->cmd_queue))) {
 417                                 r8712_unregister_cmd_alive(padapter);
 418                                 continue;
 419                         } else
 420                                 goto _next;
 421                 } else
 422                         goto _next;
 423                 flush_signals_thread();
 424         }
 425         /* free all cmd_obj resources */
 426         do {
 427                 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
 428                 if (pcmd == NULL)
 429                         break;
 430                 r8712_free_cmd_obj(pcmd);
 431         } while (1);
 432         up(&pcmdpriv->terminate_cmdthread_sema);
 433         thread_exit();
 434 }
 435
 436 void r8712_event_handle(struct _adapter *padapter, uint *peventbuf)
 437 {
 438         u8 evt_code, evt_seq;
 439         u16 evt_sz;
 440         void (*event_callback)(struct _adapter *dev, u8 *pbuf);
 441         struct  evt_priv *pevt_priv = &(padapter->evtpriv);
 442
 443         if (peventbuf == NULL)
 444                 goto _abort_event_;
 445         evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
 446         evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
 447         evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
 448         /* checking event sequence... */
 449         if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
 450                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 451                 goto _abort_event_;
 452         }
 453         /* checking if event code is valid */
 454         if (evt_code >= MAX_C2HEVT) {
 455                 pevt_priv->event_seq = ((evt_seq+1) & 0x7f);
 456                 goto _abort_event_;
 457         } else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
 458                    (evt_sz > sizeof(struct wlan_bssid_ex))) {
 459                 pevt_priv->event_seq = ((evt_seq+1)&0x7f);
 460                 goto _abort_event_;
 461         }
 462         /* checking if event size match the event parm size */
 463         if ((wlanevents[evt_code].parmsize) &&
 464             (wlanevents[evt_code].parmsize != evt_sz)) {
 465                 pevt_priv->event_seq = ((evt_seq+1)&0x7f);
 466                 goto _abort_event_;
 467         } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
 468                 pevt_priv->event_seq = ((evt_seq+1)&0x7f);
 469                 goto _abort_event_;
 470         }
 471         pevt_priv->event_seq++; /* update evt_seq */
 472         if (pevt_priv->event_seq > 127)
 473                 pevt_priv->event_seq = 0;
 474         peventbuf = peventbuf + 2; /* move to event content, 8 bytes aligment */
 475         if (peventbuf) {
 476                 event_callback = wlanevents[evt_code].event_callback;
 477                 if (event_callback)
 478                         event_callback(padapter, (u8 *)peventbuf);
 479         }
 480         pevt_priv->evt_done_cnt++;
 481 _abort_event_:
 482         return;
 483 }