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/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_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 133 {
 134         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 135
 136         r8712_free_cmd_obj(pcmd);
 137         return H2C_SUCCESS;
 138 }
 139
 140 static u8 write_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 141 {
 142         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 143         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 144
 145         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 146         if (!pcmd_callback)
 147                 r8712_free_cmd_obj(pcmd);
 148         else
 149                 pcmd_callback(padapter, pcmd);
 150         return H2C_SUCCESS;
 151 }
 152
 153 static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 154 {
 155         u32 val;
 156         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 157         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 158
 159         if (pcmd->rsp && pcmd->rspsz > 0)
 160                 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
 161         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 162         if (!pcmd_callback)
 163                 r8712_free_cmd_obj(pcmd);
 164         else
 165                 pcmd_callback(padapter, pcmd);
 166         return H2C_SUCCESS;
 167 }
 168
 169 static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 170 {
 171         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 172         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 173
 174         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 175         if (!pcmd_callback)
 176                 r8712_free_cmd_obj(pcmd);
 177         else
 178                 pcmd_callback(padapter, pcmd);
 179         return H2C_SUCCESS;
 180 }
 181
 182 static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
 183 {
 184         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 185
 186         r8712_free_cmd_obj(pcmd);
 187         return H2C_SUCCESS;
 188 }
 189
 190 static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
 191                                       struct cmd_obj *pcmd)
 192 {
 193         struct cmd_obj *pcmd_r;
 194
 195         if (!pcmd)
 196                 return pcmd;
 197         pcmd_r = NULL;
 198
 199         switch (pcmd->cmdcode) {
 200         case GEN_CMD_CODE(_Read_BBREG):
 201                 read_bbreg_hdl(padapter, (u8 *)pcmd);
 202                 break;
 203         case GEN_CMD_CODE(_Write_BBREG):
 204                 write_bbreg_hdl(padapter, (u8 *)pcmd);
 205                 break;
 206         case GEN_CMD_CODE(_Read_RFREG):
 207                 read_rfreg_hdl(padapter, (u8 *)pcmd);
 208                 break;
 209         case GEN_CMD_CODE(_Write_RFREG):
 210                 write_rfreg_hdl(padapter, (u8 *)pcmd);
 211                 break;
 212         case GEN_CMD_CODE(_SetUsbSuspend):
 213                 sys_suspend_hdl(padapter, (u8 *)pcmd);
 214                 break;
 215         case GEN_CMD_CODE(_JoinBss):
 216                 r8712_joinbss_reset(padapter);
 217                 /* Before set JoinBss_CMD to FW, driver must ensure FW is in
 218                  * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
 219                  * new pwr_mode to Driver, instead of use workitem to change
 220                  * state.
 221                  */
 222                 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
 223                         padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
 224                         mutex_lock(&padapter->pwrctrlpriv.mutex_lock);
 225                         r8712_set_rpwm(padapter, PS_STATE_S4);
 226                         mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
 227                 }
 228                 pcmd_r = pcmd;
 229                 break;
 230         case _DRV_INT_CMD_:
 231                 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
 232                 r8712_free_cmd_obj(pcmd);
 233                 pcmd_r = NULL;
 234                 break;
 235         default:
 236                 pcmd_r = pcmd;
 237                 break;
 238         }
 239         return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
 240 }
 241
 242 static u8 check_cmd_fifo(struct _adapter *padapter, uint sz)
 243 {
 244         return _SUCCESS;
 245 }
 246
 247 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
 248 {
 249         int pollingcnts = 50;
 250
 251         r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
 252         msleep(100);
 253         while ((r8712_read32(pAdapter, IOCMD_CTRL_REG != 0)) &&
 254                (pollingcnts > 0)) {
 255                 pollingcnts--;
 256                 msleep(20);
 257         }
 258         if (pollingcnts == 0)
 259                 return false;
 260         return true;
 261 }
 262
 263 void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
 264 {
 265         if (flag == 0)  /* set */
 266                 r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
 267         else            /* query */
 268                 *value = r8712_read32(pAdapter, IOCMD_DATA_REG);
 269 }
 270
 271 int r8712_cmd_thread(void *context)
 272 {
 273         struct cmd_obj *pcmd;
 274         unsigned int cmdsz, wr_sz;
 275         __le32 *pcmdbuf;
 276         struct tx_desc *pdesc;
 277         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 278         struct _adapter *padapter = context;
 279         struct  cmd_priv        *pcmdpriv = &(padapter->cmdpriv);
 280
 281         allow_signal(SIGTERM);
 282         while (1) {
 283                 if (wait_for_completion_interruptible(&pcmdpriv->cmd_queue_comp))
 284                         break;
 285                 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
 286                         break;
 287                 if (r8712_register_cmd_alive(padapter) != _SUCCESS)
 288                         continue;
 289 _next:
 290                 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
 291                 if (!(pcmd)) {
 292                         r8712_unregister_cmd_alive(padapter);
 293                         continue;
 294                 }
 295                 pcmdbuf = (__le32 *)pcmdpriv->cmd_buf;
 296                 pdesc = (struct tx_desc *)pcmdbuf;
 297                 memset(pdesc, 0, TXDESC_SIZE);
 298                 pcmd = cmd_hdl_filter(padapter, pcmd);
 299                 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
 300                         struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
 301                         u8 blnPending = 0;
 302
 303                         pcmdpriv->cmd_issued_cnt++;
 304                         cmdsz = round_up(pcmd->cmdsz, 8);
 305                         wr_sz = TXDESC_SIZE + 8 + cmdsz;
 306                         pdesc->txdw0 |= cpu_to_le32((wr_sz - TXDESC_SIZE) &
 307                                                      0x0000ffff);
 308                         if (pdvobj->ishighspeed) {
 309                                 if ((wr_sz % 512) == 0)
 310                                         blnPending = 1;
 311                         } else {
 312                                 if ((wr_sz % 64) == 0)
 313                                         blnPending = 1;
 314                         }
 315                         if (blnPending) /* 32 bytes for TX Desc - 8 offset */
 316                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 317                                                 OFFSET_SZ + 8) << OFFSET_SHT) &
 318                                                 0x00ff0000);
 319                         else {
 320                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 321                                                               OFFSET_SZ) <<
 322                                                               OFFSET_SHT) &
 323                                                               0x00ff0000);
 324                         }
 325                         pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
 326                         pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
 327                                                     0x00001f00);
 328                         pcmdbuf += (TXDESC_SIZE >> 2);
 329                         *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
 330                                                (pcmd->cmdcode << 16) |
 331                                                (pcmdpriv->cmd_seq << 24));
 332                         pcmdbuf += 2; /* 8 bytes alignment */
 333                         memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
 334                         while (check_cmd_fifo(padapter, wr_sz) == _FAIL) {
 335                                 if (padapter->bDriverStopped ||
 336                                     padapter->bSurpriseRemoved)
 337                                         break;
 338                                 msleep(100);
 339                                 continue;
 340                         }
 341                         if (blnPending)
 342                                 wr_sz += 8;   /* Append 8 bytes */
 343                         r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
 344                                         (u8 *)pdesc);
 345                         pcmdpriv->cmd_seq++;
 346                         if (pcmd->cmdcode == GEN_CMD_CODE(_CreateBss)) {
 347                                 pcmd->res = H2C_SUCCESS;
 348                                 pcmd_callback = cmd_callback[pcmd->
 349                                                 cmdcode].callback;
 350                                 if (pcmd_callback)
 351                                         pcmd_callback(padapter, pcmd);
 352                                 continue;
 353                         }
 354                         if (pcmd->cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
 355                                 if (padapter->pwrctrlpriv.bSleep) {
 356                                         mutex_lock(&padapter->
 357                                                        pwrctrlpriv.mutex_lock);
 358                                         r8712_set_rpwm(padapter, PS_STATE_S2);
 359                                         mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
 360                                 }
 361                         }
 362                         r8712_free_cmd_obj(pcmd);
 363                         if (list_empty(&pcmdpriv->cmd_queue.queue)) {
 364                                 r8712_unregister_cmd_alive(padapter);
 365                                 continue;
 366                         } else {
 367                                 goto _next;
 368                         }
 369                 } else {
 370                         goto _next;
 371                 }
 372                 flush_signals_thread();
 373         }
 374         /* free all cmd_obj resources */
 375         do {
 376                 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
 377                 if (!pcmd)
 378                         break;
 379                 r8712_free_cmd_obj(pcmd);
 380         } while (1);
 381         complete(&pcmdpriv->terminate_cmdthread_comp);
 382         thread_exit();
 383 }
 384
 385 void r8712_event_handle(struct _adapter *padapter, __le32 *peventbuf)
 386 {
 387         u8 evt_code, evt_seq;
 388         u16 evt_sz;
 389         void (*event_callback)(struct _adapter *dev, u8 *pbuf);
 390         struct  evt_priv *pevt_priv = &(padapter->evtpriv);
 391
 392         if (!peventbuf)
 393                 goto _abort_event_;
 394         evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
 395         evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
 396         evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
 397         /* checking event sequence... */
 398         if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
 399                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 400                 goto _abort_event_;
 401         }
 402         /* checking if event code is valid */
 403         if (evt_code >= MAX_C2HEVT) {
 404                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 405                 goto _abort_event_;
 406         } else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
 407                    (evt_sz > sizeof(struct wlan_bssid_ex))) {
 408                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 409                 goto _abort_event_;
 410         }
 411         /* checking if event size match the event parm size */
 412         if ((wlanevents[evt_code].parmsize) &&
 413             (wlanevents[evt_code].parmsize != evt_sz)) {
 414                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 415                 goto _abort_event_;
 416         } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
 417                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 418                 goto _abort_event_;
 419         }
 420         pevt_priv->event_seq++; /* update evt_seq */
 421         if (pevt_priv->event_seq > 127)
 422                 pevt_priv->event_seq = 0;
 423         /* move to event content, 8 bytes alignment */
 424         peventbuf = peventbuf + 2;
 425         event_callback = wlanevents[evt_code].event_callback;
 426         if (event_callback)
 427                 event_callback(padapter, (u8 *)peventbuf);
 428         pevt_priv->evt_done_cnt++;
 429 _abort_event_:
 430         return;
 431 }