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