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_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 132 {
 133         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 134
 135         r8712_free_cmd_obj(pcmd);
 136         return H2C_SUCCESS;
 137 }
 138
 139 static u8 write_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 140 {
 141         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 142         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 143
 144         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 145         if (!pcmd_callback)
 146                 r8712_free_cmd_obj(pcmd);
 147         else
 148                 pcmd_callback(padapter, pcmd);
 149         return H2C_SUCCESS;
 150 }
 151
 152 static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 153 {
 154         u32 val;
 155         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 156         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 157
 158         if (pcmd->rsp && pcmd->rspsz > 0)
 159                 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
 160         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 161         if (!pcmd_callback)
 162                 r8712_free_cmd_obj(pcmd);
 163         else
 164                 pcmd_callback(padapter, pcmd);
 165         return H2C_SUCCESS;
 166 }
 167
 168 static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 169 {
 170         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 171         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 172
 173         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 174         if (!pcmd_callback)
 175                 r8712_free_cmd_obj(pcmd);
 176         else
 177                 pcmd_callback(padapter, pcmd);
 178         return H2C_SUCCESS;
 179 }
 180
 181 static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
 182 {
 183         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 184
 185         r8712_free_cmd_obj(pcmd);
 186         return H2C_SUCCESS;
 187 }
 188
 189 static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
 190                                       struct cmd_obj *pcmd)
 191 {
 192         struct cmd_obj *pcmd_r;
 193
 194         if (!pcmd)
 195                 return pcmd;
 196         pcmd_r = NULL;
 197
 198         switch (pcmd->cmdcode) {
 199         case GEN_CMD_CODE(_Read_BBREG):
 200                 read_bbreg_hdl(padapter, (u8 *)pcmd);
 201                 break;
 202         case GEN_CMD_CODE(_Write_BBREG):
 203                 write_bbreg_hdl(padapter, (u8 *)pcmd);
 204                 break;
 205         case GEN_CMD_CODE(_Read_RFREG):
 206                 read_rfreg_hdl(padapter, (u8 *)pcmd);
 207                 break;
 208         case GEN_CMD_CODE(_Write_RFREG):
 209                 write_rfreg_hdl(padapter, (u8 *)pcmd);
 210                 break;
 211         case GEN_CMD_CODE(_SetUsbSuspend):
 212                 sys_suspend_hdl(padapter, (u8 *)pcmd);
 213                 break;
 214         case GEN_CMD_CODE(_JoinBss):
 215                 r8712_joinbss_reset(padapter);
 216                 /* Before set JoinBss_CMD to FW, driver must ensure FW is in
 217                  * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
 218                  * new pwr_mode to Driver, instead of use workitem to change
 219                  * state.
 220                  */
 221                 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
 222                         padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
 223                         mutex_lock(&padapter->pwrctrlpriv.mutex_lock);
 224                         r8712_set_rpwm(padapter, PS_STATE_S4);
 225                         mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
 226                 }
 227                 pcmd_r = pcmd;
 228                 break;
 229         case _DRV_INT_CMD_:
 230                 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
 231                 r8712_free_cmd_obj(pcmd);
 232                 pcmd_r = NULL;
 233                 break;
 234         default:
 235                 pcmd_r = pcmd;
 236                 break;
 237         }
 238         return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
 239 }
 240
 241 static u8 check_cmd_fifo(struct _adapter *padapter, uint sz)
 242 {
 243         return _SUCCESS;
 244 }
 245
 246 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
 247 {
 248         int pollingcnts = 50;
 249
 250         r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
 251         msleep(100);
 252         while ((r8712_read32(pAdapter, IOCMD_CTRL_REG != 0)) &&
 253                (pollingcnts > 0)) {
 254                 pollingcnts--;
 255                 msleep(20);
 256         }
 257         if (pollingcnts == 0)
 258                 return false;
 259         return true;
 260 }
 261
 262 void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
 263 {
 264         if (flag == 0)  /* set */
 265                 r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
 266         else            /* query */
 267                 *value = r8712_read32(pAdapter, IOCMD_DATA_REG);
 268 }
 269
 270 int r8712_cmd_thread(void *context)
 271 {
 272         struct cmd_obj *pcmd;
 273         unsigned int cmdsz, wr_sz, *pcmdbuf;
 274         struct tx_desc *pdesc;
 275         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 276         struct _adapter *padapter = context;
 277         struct  cmd_priv        *pcmdpriv = &(padapter->cmdpriv);
 278
 279         allow_signal(SIGTERM);
 280         while (1) {
 281                 if (wait_for_completion_interruptible(&pcmdpriv->cmd_queue_comp))
 282                         break;
 283                 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
 284                         break;
 285                 if (r8712_register_cmd_alive(padapter) != _SUCCESS)
 286                         continue;
 287 _next:
 288                 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
 289                 if (!(pcmd)) {
 290                         r8712_unregister_cmd_alive(padapter);
 291                         continue;
 292                 }
 293                 pcmdbuf = (unsigned int *)pcmdpriv->cmd_buf;
 294                 pdesc = (struct tx_desc *)pcmdbuf;
 295                 memset(pdesc, 0, TXDESC_SIZE);
 296                 pcmd = cmd_hdl_filter(padapter, pcmd);
 297                 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
 298                         struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
 299                         u8 blnPending = 0;
 300
 301                         pcmdpriv->cmd_issued_cnt++;
 302                         cmdsz = round_up(pcmd->cmdsz, 8);
 303                         wr_sz = TXDESC_SIZE + 8 + cmdsz;
 304                         pdesc->txdw0 |= cpu_to_le32((wr_sz - TXDESC_SIZE) &
 305                                                      0x0000ffff);
 306                         if (pdvobj->ishighspeed) {
 307                                 if ((wr_sz % 512) == 0)
 308                                         blnPending = 1;
 309                         } else {
 310                                 if ((wr_sz % 64) == 0)
 311                                         blnPending = 1;
 312                         }
 313                         if (blnPending) /* 32 bytes for TX Desc - 8 offset */
 314                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 315                                                 OFFSET_SZ + 8) << OFFSET_SHT) &
 316                                                 0x00ff0000);
 317                         else {
 318                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 319                                                               OFFSET_SZ) <<
 320                                                               OFFSET_SHT) &
 321                                                               0x00ff0000);
 322                         }
 323                         pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
 324                         pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
 325                                                     0x00001f00);
 326                         pcmdbuf += (TXDESC_SIZE >> 2);
 327                         *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
 328                                                (pcmd->cmdcode << 16) |
 329                                                (pcmdpriv->cmd_seq << 24));
 330                         pcmdbuf += 2; /* 8 bytes alignment */
 331                         memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
 332                         while (check_cmd_fifo(padapter, wr_sz) == _FAIL) {
 333                                 if (padapter->bDriverStopped ||
 334                                     padapter->bSurpriseRemoved)
 335                                         break;
 336                                 msleep(100);
 337                                 continue;
 338                         }
 339                         if (blnPending)
 340                                 wr_sz += 8;   /* Append 8 bytes */
 341                         r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
 342                                        (u8 *)pdesc);
 343                         pcmdpriv->cmd_seq++;
 344                         if (pcmd->cmdcode == GEN_CMD_CODE(_CreateBss)) {
 345                                 pcmd->res = H2C_SUCCESS;
 346                                 pcmd_callback = cmd_callback[pcmd->
 347                                                 cmdcode].callback;
 348                                 if (pcmd_callback)
 349                                         pcmd_callback(padapter, pcmd);
 350                                 continue;
 351                         }
 352                         if (pcmd->cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
 353                                 if (padapter->pwrctrlpriv.bSleep) {
 354                                         mutex_lock(&padapter->
 355                                                        pwrctrlpriv.mutex_lock);
 356                                         r8712_set_rpwm(padapter, PS_STATE_S2);
 357                                         mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
 358                                 }
 359                         }
 360                         r8712_free_cmd_obj(pcmd);
 361                         if (list_empty(&pcmdpriv->cmd_queue.queue)) {
 362                                 r8712_unregister_cmd_alive(padapter);
 363                                 continue;
 364                         } else {
 365                                 goto _next;
 366                         }
 367                 } else {
 368                         goto _next;
 369                 }
 370                 flush_signals_thread();
 371         }
 372         /* free all cmd_obj resources */
 373         do {
 374                 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
 375                 if (!pcmd)
 376                         break;
 377                 r8712_free_cmd_obj(pcmd);
 378         } while (1);
 379         complete(&pcmdpriv->terminate_cmdthread_comp);
 380         thread_exit();
 381 }
 382
 383 void r8712_event_handle(struct _adapter *padapter, uint *peventbuf)
 384 {
 385         u8 evt_code, evt_seq;
 386         u16 evt_sz;
 387         void (*event_callback)(struct _adapter *dev, u8 *pbuf);
 388         struct  evt_priv *pevt_priv = &(padapter->evtpriv);
 389
 390         if (!peventbuf)
 391                 goto _abort_event_;
 392         evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
 393         evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
 394         evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
 395         /* checking event sequence... */
 396         if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
 397                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 398                 goto _abort_event_;
 399         }
 400         /* checking if event code is valid */
 401         if (evt_code >= MAX_C2HEVT) {
 402                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 403                 goto _abort_event_;
 404         } else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
 405                    (evt_sz > sizeof(struct wlan_bssid_ex))) {
 406                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 407                 goto _abort_event_;
 408         }
 409         /* checking if event size match the event parm size */
 410         if ((wlanevents[evt_code].parmsize) &&
 411             (wlanevents[evt_code].parmsize != evt_sz)) {
 412                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 413                 goto _abort_event_;
 414         } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
 415                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 416                 goto _abort_event_;
 417         }
 418         pevt_priv->event_seq++; /* update evt_seq */
 419         if (pevt_priv->event_seq > 127)
 420                 pevt_priv->event_seq = 0;
 421         /* move to event content, 8 bytes alignment */
 422         peventbuf = peventbuf + 2;
 423         event_callback = wlanevents[evt_code].event_callback;
 424         if (event_callback)
 425                 event_callback(padapter, (u8 *)peventbuf);
 426         pevt_priv->evt_done_cnt++;
 427 _abort_event_:
 428         return;
 429 }