rtl8712_cmd.c (12278B)
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 43static 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 */ 72static 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. */ 97static void StatusWatchdogCallback(struct _adapter *padapter) 98{ 99 check_hw_pbc(padapter); 100 query_fw_rx_phy_status(padapter); 101} 102 103static 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 120static u8 read_macreg_hdl(struct _adapter *padapter, u8 *pbuf) 121{ 122 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd); 123 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf; 124 125 /* invoke cmd->callback function */ 126 pcmd_callback = cmd_callback[pcmd->cmdcode].callback; 127 if (!pcmd_callback) 128 r8712_free_cmd_obj(pcmd); 129 else 130 pcmd_callback(padapter, pcmd); 131 return H2C_SUCCESS; 132} 133 134static u8 write_macreg_hdl(struct _adapter *padapter, u8 *pbuf) 135{ 136 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd); 137 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf; 138 139 /* invoke cmd->callback function */ 140 pcmd_callback = cmd_callback[pcmd->cmdcode].callback; 141 if (!pcmd_callback) 142 r8712_free_cmd_obj(pcmd); 143 else 144 pcmd_callback(padapter, pcmd); 145 return H2C_SUCCESS; 146} 147 148static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf) 149{ 150 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf; 151 152 r8712_free_cmd_obj(pcmd); 153 return H2C_SUCCESS; 154} 155 156static u8 write_bbreg_hdl(struct _adapter *padapter, u8 *pbuf) 157{ 158 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd); 159 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf; 160 161 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 169static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf) 170{ 171 u32 val; 172 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd); 173 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf; 174 175 if (pcmd->rsp && pcmd->rspsz > 0) 176 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz); 177 pcmd_callback = cmd_callback[pcmd->cmdcode].callback; 178 if (!pcmd_callback) 179 r8712_free_cmd_obj(pcmd); 180 else 181 pcmd_callback(padapter, pcmd); 182 return H2C_SUCCESS; 183} 184 185static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf) 186{ 187 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd); 188 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf; 189 190 pcmd_callback = cmd_callback[pcmd->cmdcode].callback; 191 if (!pcmd_callback) 192 r8712_free_cmd_obj(pcmd); 193 else 194 pcmd_callback(padapter, pcmd); 195 return H2C_SUCCESS; 196} 197 198static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf) 199{ 200 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf; 201 202 r8712_free_cmd_obj(pcmd); 203 return H2C_SUCCESS; 204} 205 206static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter, 207 struct cmd_obj *pcmd) 208{ 209 struct cmd_obj *pcmd_r; 210 211 if (!pcmd) 212 return pcmd; 213 pcmd_r = NULL; 214 215 switch (pcmd->cmdcode) { 216 case GEN_CMD_CODE(_Read_MACREG): 217 read_macreg_hdl(padapter, (u8 *)pcmd); 218 pcmd_r = pcmd; 219 break; 220 case GEN_CMD_CODE(_Write_MACREG): 221 write_macreg_hdl(padapter, (u8 *)pcmd); 222 pcmd_r = pcmd; 223 break; 224 case GEN_CMD_CODE(_Read_BBREG): 225 read_bbreg_hdl(padapter, (u8 *)pcmd); 226 break; 227 case GEN_CMD_CODE(_Write_BBREG): 228 write_bbreg_hdl(padapter, (u8 *)pcmd); 229 break; 230 case GEN_CMD_CODE(_Read_RFREG): 231 read_rfreg_hdl(padapter, (u8 *)pcmd); 232 break; 233 case GEN_CMD_CODE(_Write_RFREG): 234 write_rfreg_hdl(padapter, (u8 *)pcmd); 235 break; 236 case GEN_CMD_CODE(_SetUsbSuspend): 237 sys_suspend_hdl(padapter, (u8 *)pcmd); 238 break; 239 case GEN_CMD_CODE(_JoinBss): 240 r8712_joinbss_reset(padapter); 241 /* Before set JoinBss_CMD to FW, driver must ensure FW is in 242 * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign 243 * new pwr_mode to Driver, instead of use workitem to change 244 * state. 245 */ 246 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) { 247 padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE; 248 mutex_lock(&padapter->pwrctrlpriv.mutex_lock); 249 r8712_set_rpwm(padapter, PS_STATE_S4); 250 mutex_unlock(&padapter->pwrctrlpriv.mutex_lock); 251 } 252 pcmd_r = pcmd; 253 break; 254 case _DRV_INT_CMD_: 255 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf); 256 r8712_free_cmd_obj(pcmd); 257 pcmd_r = NULL; 258 break; 259 default: 260 pcmd_r = pcmd; 261 break; 262 } 263 return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */ 264} 265 266u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd) 267{ 268 int pollingcnts = 50; 269 270 r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd); 271 msleep(100); 272 while ((r8712_read32(pAdapter, IOCMD_CTRL_REG != 0)) && 273 (pollingcnts > 0)) { 274 pollingcnts--; 275 msleep(20); 276 } 277 if (pollingcnts == 0) 278 return false; 279 return true; 280} 281 282void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag) 283{ 284 if (flag == 0) /* set */ 285 r8712_write32(pAdapter, IOCMD_DATA_REG, *value); 286 else /* query */ 287 *value = r8712_read32(pAdapter, IOCMD_DATA_REG); 288} 289 290int r8712_cmd_thread(void *context) 291{ 292 struct cmd_obj *pcmd; 293 unsigned int cmdsz, wr_sz; 294 __le32 *pcmdbuf; 295 struct tx_desc *pdesc; 296 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd); 297 struct _adapter *padapter = context; 298 struct cmd_priv *pcmdpriv = &padapter->cmdpriv; 299 struct completion *cmd_queue_comp = 300 &pcmdpriv->cmd_queue_comp; 301 struct mutex *pwctrl_lock = &padapter->pwrctrlpriv.mutex_lock; 302 303 allow_signal(SIGTERM); 304 while (1) { 305 if (wait_for_completion_interruptible(cmd_queue_comp)) 306 break; 307 if (padapter->driver_stopped || padapter->surprise_removed) 308 break; 309 if (r8712_register_cmd_alive(padapter)) 310 continue; 311_next: 312 pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue); 313 if (!(pcmd)) { 314 r8712_unregister_cmd_alive(padapter); 315 continue; 316 } 317 pcmdbuf = (__le32 *)pcmdpriv->cmd_buf; 318 pdesc = (struct tx_desc *)pcmdbuf; 319 memset(pdesc, 0, TXDESC_SIZE); 320 pcmd = cmd_hdl_filter(padapter, pcmd); 321 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */ 322 struct dvobj_priv *pdvobj = &padapter->dvobjpriv; 323 u8 blnPending = 0; 324 u16 cmdcode = pcmd->cmdcode; 325 326 pcmdpriv->cmd_issued_cnt++; 327 cmdsz = round_up(pcmd->cmdsz, 8); 328 wr_sz = TXDESC_SIZE + 8 + cmdsz; 329 pdesc->txdw0 |= cpu_to_le32((wr_sz - TXDESC_SIZE) & 330 0x0000ffff); 331 if (pdvobj->ishighspeed) { 332 if ((wr_sz % 512) == 0) 333 blnPending = 1; 334 } else { 335 if ((wr_sz % 64) == 0) 336 blnPending = 1; 337 } 338 if (blnPending) { /* 32 bytes for TX Desc - 8 offset */ 339 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE + 340 OFFSET_SZ + 8) << OFFSET_SHT) & 341 0x00ff0000); 342 } else { 343 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE + 344 OFFSET_SZ) << 345 OFFSET_SHT) & 346 0x00ff0000); 347 } 348 pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG); 349 pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) & 350 0x00001f00); 351 pcmdbuf += (TXDESC_SIZE >> 2); 352 *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) | 353 (pcmd->cmdcode << 16) | 354 (pcmdpriv->cmd_seq << 24)); 355 pcmdbuf += 2; /* 8 bytes alignment */ 356 memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz); 357 if (blnPending) 358 wr_sz += 8; /* Append 8 bytes */ 359 r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz, 360 (u8 *)pdesc); 361 pcmdpriv->cmd_seq++; 362 if (cmdcode == GEN_CMD_CODE(_CreateBss)) { 363 pcmd->res = H2C_SUCCESS; 364 pcmd_callback = cmd_callback[cmdcode].callback; 365 if (pcmd_callback) 366 pcmd_callback(padapter, pcmd); 367 continue; 368 } 369 if (cmdcode == GEN_CMD_CODE(_SetPwrMode)) { 370 if (padapter->pwrctrlpriv.bSleep) { 371 mutex_lock(pwctrl_lock); 372 r8712_set_rpwm(padapter, PS_STATE_S2); 373 mutex_unlock(pwctrl_lock); 374 } 375 } 376 r8712_free_cmd_obj(pcmd); 377 if (list_empty(&pcmdpriv->cmd_queue.queue)) { 378 r8712_unregister_cmd_alive(padapter); 379 continue; 380 } else { 381 goto _next; 382 } 383 } else { 384 goto _next; 385 } 386 flush_signals_thread(); 387 } 388 /* free all cmd_obj resources */ 389 do { 390 pcmd = r8712_dequeue_cmd(&pcmdpriv->cmd_queue); 391 if (!pcmd) 392 break; 393 r8712_free_cmd_obj(pcmd); 394 } while (1); 395 complete(&pcmdpriv->terminate_cmdthread_comp); 396 return 0; 397} 398 399void r8712_event_handle(struct _adapter *padapter, __le32 *peventbuf) 400{ 401 u8 evt_code, evt_seq; 402 u16 evt_sz; 403 void (*event_callback)(struct _adapter *dev, u8 *pbuf); 404 struct evt_priv *pevt_priv = &padapter->evtpriv; 405 406 if (!peventbuf) 407 goto _abort_event_; 408 evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff); 409 evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f); 410 evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff); 411 /* checking event sequence... */ 412 if ((evt_seq & 0x7f) != pevt_priv->event_seq) { 413 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f); 414 goto _abort_event_; 415 } 416 /* checking if event code is valid */ 417 if (evt_code >= MAX_C2HEVT) { 418 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f); 419 goto _abort_event_; 420 } else if ((evt_code == GEN_EVT_CODE(_Survey)) && 421 (evt_sz > sizeof(struct wlan_bssid_ex))) { 422 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f); 423 goto _abort_event_; 424 } 425 /* checking if event size match the event parm size */ 426 if ((wlanevents[evt_code].parmsize) && 427 (wlanevents[evt_code].parmsize != evt_sz)) { 428 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f); 429 goto _abort_event_; 430 } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) { 431 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f); 432 goto _abort_event_; 433 } 434 pevt_priv->event_seq++; /* update evt_seq */ 435 if (pevt_priv->event_seq > 127) 436 pevt_priv->event_seq = 0; 437 /* move to event content, 8 bytes alignment */ 438 peventbuf = peventbuf + 2; 439 event_callback = wlanevents[evt_code].event_callback; 440 if (event_callback) 441 event_callback(padapter, (u8 *)peventbuf); 442 pevt_priv->evt_done_cnt++; 443_abort_event_: 444 return; 445}