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 <[email protected]>.
  25  * Larry Finger <[email protected]>
  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/sched/signal.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                  */
  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 provide its pid to driver.
  73                  */
  74                 if (padapter->pid == 0)
  75                         return;
  76                 kill_pid(find_vpid(padapter->pid), SIGUSR1, 1);
  77         }
  78 }
  79
  80 /* query rx phy status from fw.
  81  * Adhoc mode: beacon.
  82  * Infrastructure mode: beacon , data.
  83  */
  84 static void query_fw_rx_phy_status(struct _adapter *padapter)
  85 {
  86         u32 val32 = 0;
  87         int pollingcnts = 50;
  88
  89         if (check_fwstate(&padapter->mlmepriv, _FW_LINKED)) {
  90                 r8712_write32(padapter, IOCMD_CTRL_REG, 0xf4000001);
  91                 msleep(100);
  92                 /* Wait FW complete IO Cmd */
  93                 while ((r8712_read32(padapter, IOCMD_CTRL_REG)) &&
  94                        (pollingcnts > 0)) {
  95                         pollingcnts--;
  96                         msleep(20);
  97                 }
  98                 if (pollingcnts != 0)
  99                         val32 = r8712_read32(padapter, IOCMD_DATA_REG);
 100                 else /* time out */
 101                         val32 = 0;
 102                 val32 >>= 4;
 103                 padapter->recvpriv.fw_rssi =
 104                          (u8)r8712_signal_scale_mapping(val32);
 105         }
 106 }
 107
 108 /* check mlme, hw, phy, or dynamic algorithm status. */
 109 static void StatusWatchdogCallback(struct _adapter *padapter)
 110 {
 111         check_hw_pbc(padapter);
 112         query_fw_rx_phy_status(padapter);
 113 }
 114
 115 static void r871x_internal_cmd_hdl(struct _adapter *padapter, u8 *pbuf)
 116 {
 117         struct drvint_cmd_parm *pdrvcmd;
 118
 119         if (!pbuf)
 120                 return;
 121         pdrvcmd = (struct drvint_cmd_parm *)pbuf;
 122         switch (pdrvcmd->i_cid) {
 123         case WDG_WK_CID:
 124                 StatusWatchdogCallback(padapter);
 125                 break;
 126         default:
 127                 break;
 128         }
 129         kfree(pdrvcmd->pbuf);
 130 }
 131
 132 static u8 read_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
 133 {
 134         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj      *pcmd);
 135         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 136
 137         /*  invoke cmd->callback function */
 138         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 139         if (!pcmd_callback)
 140                 r8712_free_cmd_obj(pcmd);
 141         else
 142                 pcmd_callback(padapter, pcmd);
 143         return H2C_SUCCESS;
 144 }
 145
 146 static u8 write_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
 147 {
 148         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj      *pcmd);
 149         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 150
 151         /*  invoke cmd->callback function */
 152         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 153         if (!pcmd_callback)
 154                 r8712_free_cmd_obj(pcmd);
 155         else
 156                 pcmd_callback(padapter, pcmd);
 157         return H2C_SUCCESS;
 158 }
 159
 160 static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 161 {
 162         u32 val;
 163         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj      *pcmd);
 164         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 165
 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)
 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 cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 180
 181         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 182         if (!pcmd_callback)
 183                 r8712_free_cmd_obj(pcmd);
 184         else
 185                 pcmd_callback(padapter, pcmd);
 186         return H2C_SUCCESS;
 187 }
 188
 189 static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 190 {
 191         u32 val;
 192         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 193         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 194
 195         if (pcmd->rsp && pcmd->rspsz > 0)
 196                 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
 197         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 198         if (!pcmd_callback)
 199                 r8712_free_cmd_obj(pcmd);
 200         else
 201                 pcmd_callback(padapter, pcmd);
 202         return H2C_SUCCESS;
 203 }
 204
 205 static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 206 {
 207         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 208         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 209
 210         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 211         if (!pcmd_callback)
 212                 r8712_free_cmd_obj(pcmd);
 213         else
 214                 pcmd_callback(padapter, pcmd);
 215         return H2C_SUCCESS;
 216 }
 217
 218 static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
 219 {
 220         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 221
 222         r8712_free_cmd_obj(pcmd);
 223         return H2C_SUCCESS;
 224 }
 225
 226 static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
 227                                       struct cmd_obj *pcmd)
 228 {
 229         struct cmd_obj *pcmd_r;
 230
 231         if (!pcmd)
 232                 return pcmd;
 233         pcmd_r = NULL;
 234
 235         switch (pcmd->cmdcode) {
 236         case GEN_CMD_CODE(_Read_MACREG):
 237                 read_macreg_hdl(padapter, (u8 *)pcmd);
 238                 pcmd_r = pcmd;
 239                 break;
 240         case GEN_CMD_CODE(_Write_MACREG):
 241                 write_macreg_hdl(padapter, (u8 *)pcmd);
 242                 pcmd_r = pcmd;
 243                 break;
 244         case GEN_CMD_CODE(_Read_BBREG):
 245                 read_bbreg_hdl(padapter, (u8 *)pcmd);
 246                 break;
 247         case GEN_CMD_CODE(_Write_BBREG):
 248                 write_bbreg_hdl(padapter, (u8 *)pcmd);
 249                 break;
 250         case GEN_CMD_CODE(_Read_RFREG):
 251                 read_rfreg_hdl(padapter, (u8 *)pcmd);
 252                 break;
 253         case GEN_CMD_CODE(_Write_RFREG):
 254                 write_rfreg_hdl(padapter, (u8 *)pcmd);
 255                 break;
 256         case GEN_CMD_CODE(_SetUsbSuspend):
 257                 sys_suspend_hdl(padapter, (u8 *)pcmd);
 258                 break;
 259         case GEN_CMD_CODE(_JoinBss):
 260                 r8712_joinbss_reset(padapter);
 261                 /* Before set JoinBss_CMD to FW, driver must ensure FW is in
 262                  * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
 263                  * new pwr_mode to Driver, instead of use workitem to change
 264                  * state.
 265                  */
 266                 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
 267                         padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
 268                         mutex_lock(&padapter->pwrctrlpriv.mutex_lock);
 269                         r8712_set_rpwm(padapter, PS_STATE_S4);
 270                         mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
 271                 }
 272                 pcmd_r = pcmd;
 273                 break;
 274         case _DRV_INT_CMD_:
 275                 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
 276                 r8712_free_cmd_obj(pcmd);
 277                 pcmd_r = NULL;
 278                 break;
 279         default:
 280                 pcmd_r = pcmd;
 281                 break;
 282         }
 283         return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
 284 }
 285
 286 static u8 check_cmd_fifo(struct _adapter *padapter, uint sz)
 287 {
 288         return _SUCCESS;
 289 }
 290
 291 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
 292 {
 293         int pollingcnts = 50;
 294
 295         r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
 296         msleep(100);
 297         while ((r8712_read32(pAdapter, IOCMD_CTRL_REG != 0)) &&
 298                (pollingcnts > 0)) {
 299                 pollingcnts--;
 300                 msleep(20);
 301         }
 302         if (pollingcnts == 0)
 303                 return false;
 304         return true;
 305 }
 306
 307 void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
 308 {
 309         if (flag == 0)  /* set */
 310                 r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
 311         else            /* query */
 312                 *value = r8712_read32(pAdapter, IOCMD_DATA_REG);
 313 }
 314
 315 int r8712_cmd_thread(void *context)
 316 {
 317         struct cmd_obj *pcmd;
 318         unsigned int cmdsz, wr_sz;
 319         __le32 *pcmdbuf;
 320         struct tx_desc *pdesc;
 321         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 322         struct _adapter *padapter = context;
 323         struct  cmd_priv *pcmdpriv = &padapter->cmdpriv;
 324         struct completion *cmd_queue_comp =
 325                 &pcmdpriv->cmd_queue_comp;
 326         struct mutex *pwctrl_lock = &padapter->pwrctrlpriv.mutex_lock;
 327
 328         allow_signal(SIGTERM);
 329         while (1) {
 330                 if (wait_for_completion_interruptible(cmd_queue_comp))
 331                         break;
 332                 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
 333                         break;
 334                 if (r8712_register_cmd_alive(padapter) != _SUCCESS)
 335                         continue;
 336 _next:
 337                 pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue);
 338                 if (!(pcmd)) {
 339                         r8712_unregister_cmd_alive(padapter);
 340                         continue;
 341                 }
 342                 pcmdbuf = (__le32 *)pcmdpriv->cmd_buf;
 343                 pdesc = (struct tx_desc *)pcmdbuf;
 344                 memset(pdesc, 0, TXDESC_SIZE);
 345                 pcmd = cmd_hdl_filter(padapter, pcmd);
 346                 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
 347                         struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
 348                         u8 blnPending = 0;
 349                         u16 cmdcode = pcmd->cmdcode;
 350
 351                         pcmdpriv->cmd_issued_cnt++;
 352                         cmdsz = round_up(pcmd->cmdsz, 8);
 353                         wr_sz = TXDESC_SIZE + 8 + cmdsz;
 354                         pdesc->txdw0 |= cpu_to_le32((wr_sz - TXDESC_SIZE) &
 355                                                      0x0000ffff);
 356                         if (pdvobj->ishighspeed) {
 357                                 if ((wr_sz % 512) == 0)
 358                                         blnPending = 1;
 359                         } else {
 360                                 if ((wr_sz % 64) == 0)
 361                                         blnPending = 1;
 362                         }
 363                         if (blnPending) { /* 32 bytes for TX Desc - 8 offset */
 364                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 365                                                 OFFSET_SZ + 8) << OFFSET_SHT) &
 366                                                 0x00ff0000);
 367                         } else {
 368                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 369                                                               OFFSET_SZ) <<
 370                                                               OFFSET_SHT) &
 371                                                               0x00ff0000);
 372                         }
 373                         pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
 374                         pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
 375                                                     0x00001f00);
 376                         pcmdbuf += (TXDESC_SIZE >> 2);
 377                         *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
 378                                                (pcmd->cmdcode << 16) |
 379                                                (pcmdpriv->cmd_seq << 24));
 380                         pcmdbuf += 2; /* 8 bytes alignment */
 381                         memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
 382                         while (check_cmd_fifo(padapter, wr_sz) == _FAIL) {
 383                                 if (padapter->bDriverStopped ||
 384                                     padapter->bSurpriseRemoved)
 385                                         break;
 386                                 msleep(100);
 387                                 continue;
 388                         }
 389                         if (blnPending)
 390                                 wr_sz += 8;   /* Append 8 bytes */
 391                         r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
 392                                         (u8 *)pdesc);
 393                         pcmdpriv->cmd_seq++;
 394                         if (cmdcode == GEN_CMD_CODE(_CreateBss)) {
 395                                 pcmd->res = H2C_SUCCESS;
 396                                 pcmd_callback = cmd_callback[cmdcode].callback;
 397                                 if (pcmd_callback)
 398                                         pcmd_callback(padapter, pcmd);
 399                                 continue;
 400                         }
 401                         if (cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
 402                                 if (padapter->pwrctrlpriv.bSleep) {
 403                                         mutex_lock(pwctrl_lock);
 404                                         r8712_set_rpwm(padapter, PS_STATE_S2);
 405                                         mutex_unlock(pwctrl_lock);
 406                                 }
 407                         }
 408                         r8712_free_cmd_obj(pcmd);
 409                         if (list_empty(&pcmdpriv->cmd_queue.queue)) {
 410                                 r8712_unregister_cmd_alive(padapter);
 411                                 continue;
 412                         } else {
 413                                 goto _next;
 414                         }
 415                 } else {
 416                         goto _next;
 417                 }
 418                 flush_signals_thread();
 419         }
 420         /* free all cmd_obj resources */
 421         do {
 422                 pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue);
 423                 if (!pcmd)
 424                         break;
 425                 r8712_free_cmd_obj(pcmd);
 426         } while (1);
 427         complete(&pcmdpriv->terminate_cmdthread_comp);
 428         thread_exit();
 429 }
 430
 431 void r8712_event_handle(struct _adapter *padapter, __le32 *peventbuf)
 432 {
 433         u8 evt_code, evt_seq;
 434         u16 evt_sz;
 435         void (*event_callback)(struct _adapter *dev, u8 *pbuf);
 436         struct  evt_priv *pevt_priv = &padapter->evtpriv;
 437
 438         if (!peventbuf)
 439                 goto _abort_event_;
 440         evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
 441         evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
 442         evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
 443         /* checking event sequence... */
 444         if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
 445                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 446                 goto _abort_event_;
 447         }
 448         /* checking if event code is valid */
 449         if (evt_code >= MAX_C2HEVT) {
 450                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 451                 goto _abort_event_;
 452         } else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
 453                    (evt_sz > sizeof(struct wlan_bssid_ex))) {
 454                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 455                 goto _abort_event_;
 456         }
 457         /* checking if event size match the event parm size */
 458         if ((wlanevents[evt_code].parmsize) &&
 459             (wlanevents[evt_code].parmsize != evt_sz)) {
 460                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 461                 goto _abort_event_;
 462         } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
 463                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 464                 goto _abort_event_;
 465         }
 466         pevt_priv->event_seq++; /* update evt_seq */
 467         if (pevt_priv->event_seq > 127)
 468                 pevt_priv->event_seq = 0;
 469         /* move to event content, 8 bytes alignment */
 470         peventbuf = peventbuf + 2;
 471         event_callback = wlanevents[evt_code].event_callback;
 472         if (event_callback)
 473                 event_callback(padapter, (u8 *)peventbuf);
 474         pevt_priv->evt_done_cnt++;
 475 _abort_event_:
 476         return;
 477 }