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