drivers/staging/rtl8712/rtl8712_cmd.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  * rtl8712_cmd.c
   4  *
   5  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
   6  * Linux device driver for RTL8192SU
   7  *
   8  * Modifications for inclusion into the Linux staging tree are
   9  * Copyright(c) 2010 Larry Finger. All rights reserved.
  10  *
  11  * Contact information:
  12  * WLAN FAE <wlanfae@realtek.com>.
  13  * Larry Finger <Larry.Finger@lwfinger.net>
  14  *
  15  ******************************************************************************/
  16
  17 #define _RTL8712_CMD_C_
  18
  19 #include <linux/compiler.h>
  20 #include <linux/kernel.h>
  21 #include <linux/errno.h>
  22 #include <linux/slab.h>
  23 #include <linux/sched/signal.h>
  24 #include <linux/module.h>
  25 #include <linux/kref.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/usb.h>
  29 #include <linux/usb/ch9.h>
  30 #include <linux/circ_buf.h>
  31 #include <linux/uaccess.h>
  32 #include <asm/byteorder.h>
  33 #include <linux/atomic.h>
  34 #include <linux/semaphore.h>
  35 #include <linux/rtnetlink.h>
  36
  37 #include "osdep_service.h"
  38 #include "drv_types.h"
  39 #include "recv_osdep.h"
  40 #include "mlme_osdep.h"
  41 #include "rtl871x_ioctl_set.h"
  42
  43 static void check_hw_pbc(struct _adapter *padapter)
  44 {
  45         u8      tmp1byte;
  46
  47         r8712_write8(padapter, MAC_PINMUX_CTRL, (GPIOMUX_EN | GPIOSEL_GPIO));
  48         tmp1byte = r8712_read8(padapter, GPIO_IO_SEL);
  49         tmp1byte &= ~(HAL_8192S_HW_GPIO_WPS_BIT);
  50         r8712_write8(padapter, GPIO_IO_SEL, tmp1byte);
  51         tmp1byte = r8712_read8(padapter, GPIO_CTRL);
  52         if (tmp1byte == 0xff)
  53                 return;
  54         if (tmp1byte & HAL_8192S_HW_GPIO_WPS_BIT) {
  55                 /* Here we only set bPbcPressed to true
  56                  * After trigger PBC, the variable will be set to false
  57                  */
  58                 netdev_dbg(padapter->pnetdev, "CheckPbcGPIO - PBC is pressed !!!!\n");
  59                 /* 0 is the default value and it means the application monitors
  60                  * the HW PBC doesn't provide its pid to driver.
  61                  */
  62                 if (padapter->pid == 0)
  63                         return;
  64                 kill_pid(find_vpid(padapter->pid), SIGUSR1, 1);
  65         }
  66 }
  67
  68 /* query rx phy status from fw.
  69  * Adhoc mode: beacon.
  70  * Infrastructure mode: beacon , data.
  71  */
  72 static void query_fw_rx_phy_status(struct _adapter *padapter)
  73 {
  74         u32 val32 = 0;
  75         int pollingcnts = 50;
  76
  77         if (check_fwstate(&padapter->mlmepriv, _FW_LINKED)) {
  78                 r8712_write32(padapter, IOCMD_CTRL_REG, 0xf4000001);
  79                 msleep(100);
  80                 /* Wait FW complete IO Cmd */
  81                 while ((r8712_read32(padapter, IOCMD_CTRL_REG)) &&
  82                        (pollingcnts > 0)) {
  83                         pollingcnts--;
  84                         msleep(20);
  85                 }
  86                 if (pollingcnts != 0)
  87                         val32 = r8712_read32(padapter, IOCMD_DATA_REG);
  88                 else /* time out */
  89                         val32 = 0;
  90                 val32 >>= 4;
  91                 padapter->recvpriv.fw_rssi =
  92                          (u8)r8712_signal_scale_mapping(val32);
  93         }
  94 }
  95
  96 /* check mlme, hw, phy, or dynamic algorithm status. */
  97 static void StatusWatchdogCallback(struct _adapter *padapter)
  98 {
  99         check_hw_pbc(padapter);
 100         query_fw_rx_phy_status(padapter);
 101 }
 102
 103 static void r871x_internal_cmd_hdl(struct _adapter *padapter, u8 *pbuf)
 104 {
 105         struct drvint_cmd_parm *pdrvcmd;
 106
 107         if (!pbuf)
 108                 return;
 109         pdrvcmd = (struct drvint_cmd_parm *)pbuf;
 110         switch (pdrvcmd->i_cid) {
 111         case WDG_WK_CID:
 112                 StatusWatchdogCallback(padapter);
 113                 break;
 114         default:
 115                 break;
 116         }
 117         kfree(pdrvcmd->pbuf);
 118 }
 119
 120 static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
 121 {
 122         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 123
 124         r8712_free_cmd_obj(pcmd);
 125         return H2C_SUCCESS;
 126 }
 127
 128 static u8 write_bbreg_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         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 134         if (!pcmd_callback)
 135                 r8712_free_cmd_obj(pcmd);
 136         else
 137                 pcmd_callback(padapter, pcmd);
 138         return H2C_SUCCESS;
 139 }
 140
 141 static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 142 {
 143         u32 val;
 144         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 145         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 146
 147         if (pcmd->rsp && pcmd->rspsz > 0)
 148                 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
 149         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 150         if (!pcmd_callback)
 151                 r8712_free_cmd_obj(pcmd);
 152         else
 153                 pcmd_callback(padapter, pcmd);
 154         return H2C_SUCCESS;
 155 }
 156
 157 static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
 158 {
 159         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 160         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 161
 162         pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
 163         if (!pcmd_callback)
 164                 r8712_free_cmd_obj(pcmd);
 165         else
 166                 pcmd_callback(padapter, pcmd);
 167         return H2C_SUCCESS;
 168 }
 169
 170 static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
 171 {
 172         struct cmd_obj *pcmd  = (struct cmd_obj *)pbuf;
 173
 174         r8712_free_cmd_obj(pcmd);
 175         return H2C_SUCCESS;
 176 }
 177
 178 static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
 179                                       struct cmd_obj *pcmd)
 180 {
 181         struct cmd_obj *pcmd_r;
 182
 183         if (!pcmd)
 184                 return pcmd;
 185         pcmd_r = NULL;
 186
 187         switch (pcmd->cmdcode) {
 188         case GEN_CMD_CODE(_Read_BBREG):
 189                 read_bbreg_hdl(padapter, (u8 *)pcmd);
 190                 break;
 191         case GEN_CMD_CODE(_Write_BBREG):
 192                 write_bbreg_hdl(padapter, (u8 *)pcmd);
 193                 break;
 194         case GEN_CMD_CODE(_Read_RFREG):
 195                 read_rfreg_hdl(padapter, (u8 *)pcmd);
 196                 break;
 197         case GEN_CMD_CODE(_Write_RFREG):
 198                 write_rfreg_hdl(padapter, (u8 *)pcmd);
 199                 break;
 200         case GEN_CMD_CODE(_SetUsbSuspend):
 201                 sys_suspend_hdl(padapter, (u8 *)pcmd);
 202                 break;
 203         case GEN_CMD_CODE(_JoinBss):
 204                 r8712_joinbss_reset(padapter);
 205                 /* Before set JoinBss_CMD to FW, driver must ensure FW is in
 206                  * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
 207                  * new pwr_mode to Driver, instead of use workitem to change
 208                  * state.
 209                  */
 210                 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
 211                         padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
 212                         mutex_lock(&padapter->pwrctrlpriv.mutex_lock);
 213                         r8712_set_rpwm(padapter, PS_STATE_S4);
 214                         mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
 215                 }
 216                 pcmd_r = pcmd;
 217                 break;
 218         case _DRV_INT_CMD_:
 219                 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
 220                 r8712_free_cmd_obj(pcmd);
 221                 pcmd_r = NULL;
 222                 break;
 223         default:
 224                 pcmd_r = pcmd;
 225                 break;
 226         }
 227         return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
 228 }
 229
 230 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
 231 {
 232         int pollingcnts = 50;
 233
 234         r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
 235         msleep(100);
 236         while ((r8712_read32(pAdapter, IOCMD_CTRL_REG != 0)) &&
 237                (pollingcnts > 0)) {
 238                 pollingcnts--;
 239                 msleep(20);
 240         }
 241         if (pollingcnts == 0)
 242                 return false;
 243         return true;
 244 }
 245
 246 void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
 247 {
 248         if (flag == 0)  /* set */
 249                 r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
 250         else            /* query */
 251                 *value = r8712_read32(pAdapter, IOCMD_DATA_REG);
 252 }
 253
 254 int r8712_cmd_thread(void *context)
 255 {
 256         struct cmd_obj *pcmd;
 257         unsigned int cmdsz, wr_sz;
 258         __le32 *pcmdbuf;
 259         struct tx_desc *pdesc;
 260         void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
 261         struct _adapter *padapter = context;
 262         struct  cmd_priv *pcmdpriv = &padapter->cmdpriv;
 263         struct completion *cmd_queue_comp =
 264                 &pcmdpriv->cmd_queue_comp;
 265         struct mutex *pwctrl_lock = &padapter->pwrctrlpriv.mutex_lock;
 266
 267         allow_signal(SIGTERM);
 268         while (1) {
 269                 if (wait_for_completion_interruptible(cmd_queue_comp))
 270                         break;
 271                 if (padapter->driver_stopped || padapter->surprise_removed)
 272                         break;
 273                 if (r8712_register_cmd_alive(padapter))
 274                         continue;
 275 _next:
 276                 pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue);
 277                 if (!(pcmd)) {
 278                         r8712_unregister_cmd_alive(padapter);
 279                         continue;
 280                 }
 281                 pcmdbuf = (__le32 *)pcmdpriv->cmd_buf;
 282                 pdesc = (struct tx_desc *)pcmdbuf;
 283                 memset(pdesc, 0, TXDESC_SIZE);
 284                 pcmd = cmd_hdl_filter(padapter, pcmd);
 285                 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
 286                         struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
 287                         u8 blnPending = 0;
 288                         u16 cmdcode = pcmd->cmdcode;
 289
 290                         pcmdpriv->cmd_issued_cnt++;
 291                         cmdsz = round_up(pcmd->cmdsz, 8);
 292                         wr_sz = TXDESC_SIZE + 8 + cmdsz;
 293                         pdesc->txdw0 |= cpu_to_le32((wr_sz - TXDESC_SIZE) &
 294                                                      0x0000ffff);
 295                         if (pdvobj->ishighspeed) {
 296                                 if ((wr_sz % 512) == 0)
 297                                         blnPending = 1;
 298                         } else {
 299                                 if ((wr_sz % 64) == 0)
 300                                         blnPending = 1;
 301                         }
 302                         if (blnPending) { /* 32 bytes for TX Desc - 8 offset */
 303                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 304                                                 OFFSET_SZ + 8) << OFFSET_SHT) &
 305                                                 0x00ff0000);
 306                         } else {
 307                                 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
 308                                                               OFFSET_SZ) <<
 309                                                               OFFSET_SHT) &
 310                                                               0x00ff0000);
 311                         }
 312                         pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
 313                         pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
 314                                                     0x00001f00);
 315                         pcmdbuf += (TXDESC_SIZE >> 2);
 316                         *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
 317                                                (pcmd->cmdcode << 16) |
 318                                                (pcmdpriv->cmd_seq << 24));
 319                         pcmdbuf += 2; /* 8 bytes alignment */
 320                         memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
 321                         if (blnPending)
 322                                 wr_sz += 8;   /* Append 8 bytes */
 323                         r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
 324                                         (u8 *)pdesc);
 325                         pcmdpriv->cmd_seq++;
 326                         if (cmdcode == GEN_CMD_CODE(_CreateBss)) {
 327                                 pcmd->res = H2C_SUCCESS;
 328                                 pcmd_callback = cmd_callback[cmdcode].callback;
 329                                 if (pcmd_callback)
 330                                         pcmd_callback(padapter, pcmd);
 331                                 continue;
 332                         }
 333                         if (cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
 334                                 if (padapter->pwrctrlpriv.bSleep) {
 335                                         mutex_lock(pwctrl_lock);
 336                                         r8712_set_rpwm(padapter, PS_STATE_S2);
 337                                         mutex_unlock(pwctrl_lock);
 338                                 }
 339                         }
 340                         r8712_free_cmd_obj(pcmd);
 341                         if (list_empty(&pcmdpriv->cmd_queue.queue)) {
 342                                 r8712_unregister_cmd_alive(padapter);
 343                                 continue;
 344                         } else {
 345                                 goto _next;
 346                         }
 347                 } else {
 348                         goto _next;
 349                 }
 350                 flush_signals_thread();
 351         }
 352         /* free all cmd_obj resources */
 353         do {
 354                 pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue);
 355                 if (!pcmd)
 356                         break;
 357                 r8712_free_cmd_obj(pcmd);
 358         } while (1);
 359         complete(&pcmdpriv->terminate_cmdthread_comp);
 360         return 0;
 361 }
 362
 363 void r8712_event_handle(struct _adapter *padapter, __le32 *peventbuf)
 364 {
 365         u8 evt_code, evt_seq;
 366         u16 evt_sz;
 367         void (*event_callback)(struct _adapter *dev, u8 *pbuf);
 368         struct  evt_priv *pevt_priv = &padapter->evtpriv;
 369
 370         if (!peventbuf)
 371                 goto _abort_event_;
 372         evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
 373         evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
 374         evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
 375         /* checking event sequence... */
 376         if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
 377                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 378                 goto _abort_event_;
 379         }
 380         /* checking if event code is valid */
 381         if (evt_code >= MAX_C2HEVT) {
 382                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 383                 goto _abort_event_;
 384         } else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
 385                    (evt_sz > sizeof(struct wlan_bssid_ex))) {
 386                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 387                 goto _abort_event_;
 388         }
 389         /* checking if event size match the event parm size */
 390         if ((wlanevents[evt_code].parmsize) &&
 391             (wlanevents[evt_code].parmsize != evt_sz)) {
 392                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 393                 goto _abort_event_;
 394         } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
 395                 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
 396                 goto _abort_event_;
 397         }
 398         pevt_priv->event_seq++; /* update evt_seq */
 399         if (pevt_priv->event_seq > 127)
 400                 pevt_priv->event_seq = 0;
 401         /* move to event content, 8 bytes alignment */
 402         peventbuf = peventbuf + 2;
 403         event_callback = wlanevents[evt_code].event_callback;
 404         if (event_callback)
 405                 event_callback(padapter, (u8 *)peventbuf);
 406         pevt_priv->evt_done_cnt++;
 407 _abort_event_:
 408         return;
 409 }