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