drivers/staging/rtl8723au/core/rtw_efuse.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  ******************************************************************************/
  15 #define _RTW_EFUSE_C_
  16
  17 #include <osdep_service.h>
  18 #include <drv_types.h>
  19
  20 #include <rtw_efuse.h>
  21 #include <rtl8723a_hal.h>
  22 #include <usb_ops_linux.h>
  23
  24 #define REG_EFUSE_CTRL          0x0030
  25 #define EFUSE_CTRL              REG_EFUSE_CTRL  /* E-Fuse Control */
  26
  27 #define VOLTAGE_V25             0x03
  28 #define LDOE25_SHIFT            28
  29
  30 /*
  31  * When we want to enable write operation, we should change to
  32  * pwr on state. When we stop write, we should switch to 500k mode
  33  * and disable LDO 2.5V.
  34  */
  35 static void Efuse_PowerSwitch(struct rtw_adapter *padapter,
  36                               u8 bWrite, u8 PwrState)
  37 {
  38         u8 tempval;
  39         u16 tmpV16;
  40
  41         if (PwrState == true) {
  42                 rtl8723au_write8(padapter, REG_EFUSE_ACCESS, EFUSE_ACCESS_ON);
  43
  44                 /*
  45                  * 1.2V Power: From VDDON with Power
  46                  * Cut(0x0000h[15]), default valid
  47                  */
  48                 tmpV16 = rtl8723au_read16(padapter, REG_SYS_ISO_CTRL);
  49                 if (!(tmpV16 & PWC_EV12V)) {
  50                         tmpV16 |= PWC_EV12V;
  51                         rtl8723au_write16(padapter, REG_SYS_ISO_CTRL, tmpV16);
  52                 }
  53                 /* Reset: 0x0000h[28], default valid */
  54                 tmpV16 = rtl8723au_read16(padapter, REG_SYS_FUNC_EN);
  55                 if (!(tmpV16 & FEN_ELDR)) {
  56                         tmpV16 |= FEN_ELDR;
  57                         rtl8723au_write16(padapter, REG_SYS_FUNC_EN, tmpV16);
  58                 }
  59
  60                 /*
  61                  * Clock: Gated(0x0008h[5]) 8M(0x0008h[1])
  62                  * clock from ANA, default valid
  63                  */
  64                 tmpV16 = rtl8723au_read16(padapter, REG_SYS_CLKR);
  65                 if ((!(tmpV16 & LOADER_CLK_EN)) || (!(tmpV16 & ANA8M))) {
  66                         tmpV16 |= (LOADER_CLK_EN | ANA8M);
  67                         rtl8723au_write16(padapter, REG_SYS_CLKR, tmpV16);
  68                 }
  69
  70                 if (bWrite == true) {
  71                         /*  Enable LDO 2.5V before read/write action */
  72                         tempval = rtl8723au_read8(padapter, EFUSE_TEST + 3);
  73                         tempval &= 0x0F;
  74                         tempval |= (VOLTAGE_V25 << 4);
  75                         rtl8723au_write8(padapter, EFUSE_TEST + 3,
  76                                          tempval | 0x80);
  77                 }
  78         } else {
  79                 rtl8723au_write8(padapter, REG_EFUSE_ACCESS, EFUSE_ACCESS_OFF);
  80
  81                 if (bWrite == true) {
  82                         /*  Disable LDO 2.5V after read/write action */
  83                         tempval = rtl8723au_read8(padapter, EFUSE_TEST + 3);
  84                         rtl8723au_write8(padapter, EFUSE_TEST + 3,
  85                                          tempval & 0x7F);
  86                 }
  87         }
  88 }
  89
  90 u16 Efuse_GetCurrentSize23a(struct rtw_adapter *pAdapter, u8 efuseType)
  91 {
  92         u16 ret = 0;
  93
  94         if (efuseType == EFUSE_WIFI)
  95                 ret = rtl8723a_EfuseGetCurrentSize_WiFi(pAdapter);
  96         else
  97                 ret = rtl8723a_EfuseGetCurrentSize_BT(pAdapter);
  98
  99         return ret;
 100 }
 101
 102 /* Get current efuse area enabled word */
 103 u8 Efuse_CalculateWordCnts23a(u8 word_en)
 104 {
 105         return hweight8((~word_en) & 0xf);
 106 }
 107
 108 /*
 109  * Description: Execute E-Fuse read byte operation.
 110  *
 111  * Assumptions: 1. Boot from E-Fuse and successfully auto-load.
 112  *              2. PASSIVE_LEVEL (USB interface)
 113  */
 114 void ReadEFuseByte23a(struct rtw_adapter *Adapter, u16 _offset, u8 *pbuf)
 115 {
 116         u32     value32;
 117         u8      readbyte;
 118         u16     retry;
 119
 120         /* Write Address */
 121         rtl8723au_write8(Adapter, EFUSE_CTRL+1, (_offset & 0xff));
 122         readbyte = rtl8723au_read8(Adapter, EFUSE_CTRL+2);
 123         rtl8723au_write8(Adapter, EFUSE_CTRL+2,
 124                          ((_offset >> 8) & 0x03) | (readbyte & 0xfc));
 125
 126         /* Write bit 32 0 */
 127         readbyte = rtl8723au_read8(Adapter, EFUSE_CTRL+3);
 128         rtl8723au_write8(Adapter, EFUSE_CTRL+3, readbyte & 0x7f);
 129
 130         /* Check bit 32 read-ready */
 131         retry = 0;
 132         value32 = rtl8723au_read32(Adapter, EFUSE_CTRL);
 133         while (!((value32 >> 24) & 0x80) && retry < 10000) {
 134                 value32 = rtl8723au_read32(Adapter, EFUSE_CTRL);
 135                 retry++;
 136         }
 137
 138         /*
 139          * Added suggested delay. This fixes the problem that
 140          * Efuse read error in high temperature condition.
 141          * Designer says that there shall be some delay after
 142          * ready bit is set, or the result will always stay
 143          * on last data we read.
 144          */
 145         udelay(50);
 146         value32 = rtl8723au_read32(Adapter, EFUSE_CTRL);
 147
 148         *pbuf = (u8)(value32 & 0xff);
 149 }
 150
 151 void EFUSE_GetEfuseDefinition23a(struct rtw_adapter *pAdapter, u8 efuseType,
 152                                  u8 type, void *pOut)
 153 {
 154         u8 *pu1Tmp;
 155         u16 *pu2Tmp;
 156         u8 *pMax_section;
 157
 158         switch (type) {
 159         case TYPE_EFUSE_MAX_SECTION:
 160                 pMax_section = pOut;
 161
 162                 if (efuseType == EFUSE_WIFI)
 163                         *pMax_section = EFUSE_MAX_SECTION_8723A;
 164                 else
 165                         *pMax_section = EFUSE_BT_MAX_SECTION;
 166                 break;
 167
 168         case TYPE_EFUSE_REAL_CONTENT_LEN:
 169                 pu2Tmp = pOut;
 170
 171                 if (efuseType == EFUSE_WIFI)
 172                         *pu2Tmp = EFUSE_REAL_CONTENT_LEN_8723A;
 173                 else
 174                         *pu2Tmp = EFUSE_BT_REAL_CONTENT_LEN;
 175                 break;
 176
 177         case TYPE_AVAILABLE_EFUSE_BYTES_BANK:
 178                 pu2Tmp = pOut;
 179
 180                 if (efuseType == EFUSE_WIFI)
 181                         *pu2Tmp = (EFUSE_REAL_CONTENT_LEN_8723A -
 182                                    EFUSE_OOB_PROTECT_BYTES);
 183                 else
 184                         *pu2Tmp = (EFUSE_BT_REAL_BANK_CONTENT_LEN -
 185                                    EFUSE_PROTECT_BYTES_BANK);
 186                 break;
 187
 188         case TYPE_AVAILABLE_EFUSE_BYTES_TOTAL:
 189                 pu2Tmp = pOut;
 190
 191                 if (efuseType == EFUSE_WIFI)
 192                         *pu2Tmp = (EFUSE_REAL_CONTENT_LEN_8723A -
 193                                    EFUSE_OOB_PROTECT_BYTES);
 194                 else
 195                         *pu2Tmp = (EFUSE_BT_REAL_CONTENT_LEN -
 196                                    (EFUSE_PROTECT_BYTES_BANK * 3));
 197                 break;
 198
 199         case TYPE_EFUSE_MAP_LEN:
 200                 pu2Tmp = pOut;
 201
 202                 if (efuseType == EFUSE_WIFI)
 203                         *pu2Tmp = EFUSE_MAP_LEN_8723A;
 204                 else
 205                         *pu2Tmp = EFUSE_BT_MAP_LEN;
 206                 break;
 207
 208         case TYPE_EFUSE_PROTECT_BYTES_BANK:
 209                 pu1Tmp = pOut;
 210
 211                 if (efuseType == EFUSE_WIFI)
 212                         *pu1Tmp = EFUSE_OOB_PROTECT_BYTES;
 213                 else
 214                         *pu1Tmp = EFUSE_PROTECT_BYTES_BANK;
 215                 break;
 216
 217         case TYPE_EFUSE_CONTENT_LEN_BANK:
 218                 pu2Tmp = pOut;
 219
 220                 if (efuseType == EFUSE_WIFI)
 221                         *pu2Tmp = EFUSE_REAL_CONTENT_LEN_8723A;
 222                 else
 223                         *pu2Tmp = EFUSE_BT_REAL_BANK_CONTENT_LEN;
 224                 break;
 225
 226         default:
 227                 pu1Tmp = pOut;
 228                 *pu1Tmp = 0;
 229                 break;
 230         }
 231 }
 232
 233 /* Copy from WMAC for EFUSE read 1 byte. */
 234 u8 EFUSE_Read1Byte23a(struct rtw_adapter *Adapter, u16 Address)
 235 {
 236         u8      data;
 237         u8      Bytetemp = {0x00};
 238         u8      temp = {0x00};
 239         u32     k = 0;
 240         u16     contentLen = 0;
 241
 242         EFUSE_GetEfuseDefinition23a(Adapter, EFUSE_WIFI,
 243                                  TYPE_EFUSE_REAL_CONTENT_LEN,
 244                                  (void *)&contentLen);
 245
 246         if (Address < contentLen) { /* E-fuse 512Byte */
 247                 /* Write E-fuse Register address bit0~7 */
 248                 temp = Address & 0xFF;
 249                 rtl8723au_write8(Adapter, EFUSE_CTRL+1, temp);
 250                 Bytetemp = rtl8723au_read8(Adapter, EFUSE_CTRL+2);
 251                 /* Write E-fuse Register address bit8~9 */
 252                 temp = ((Address >> 8) & 0x03) | (Bytetemp & 0xFC);
 253                 rtl8723au_write8(Adapter, EFUSE_CTRL+2, temp);
 254
 255                 /* Write 0x30[31]= 0 */
 256                 Bytetemp = rtl8723au_read8(Adapter, EFUSE_CTRL+3);
 257                 temp = Bytetemp & 0x7F;
 258                 rtl8723au_write8(Adapter, EFUSE_CTRL+3, temp);
 259
 260                 /* Wait Write-ready (0x30[31]= 1) */
 261                 Bytetemp = rtl8723au_read8(Adapter, EFUSE_CTRL+3);
 262                 while (!(Bytetemp & 0x80)) {
 263                         Bytetemp = rtl8723au_read8(Adapter, EFUSE_CTRL+3);
 264                         k++;
 265                         if (k == 1000) {
 266                                 k = 0;
 267                                 break;
 268                         }
 269                 }
 270                 data = rtl8723au_read8(Adapter, EFUSE_CTRL);
 271                 return data;
 272         } else
 273                 return 0xFF;
 274 }
 275
 276 /* Read one byte from real Efuse. */
 277 int efuse_OneByteRead23a(struct rtw_adapter *pAdapter, u16 addr, u8 *data)
 278 {
 279         u8      tmpidx = 0;
 280         int     bResult;
 281
 282         /*  -----------------e-fuse reg ctrl ---------------------------- */
 283         /* address */
 284         rtl8723au_write8(pAdapter, EFUSE_CTRL + 1, (u8)(addr & 0xff));
 285         rtl8723au_write8(pAdapter, EFUSE_CTRL + 2,
 286                          ((u8)((addr >> 8) & 0x03)) |
 287                          (rtl8723au_read8(pAdapter, EFUSE_CTRL + 2) & 0xFC));
 288
 289         rtl8723au_write8(pAdapter, EFUSE_CTRL + 3, 0x72); /* read cmd */
 290
 291         while (!(0x80 & rtl8723au_read8(pAdapter, EFUSE_CTRL + 3)) &&
 292                (tmpidx < 100))
 293                 tmpidx++;
 294         if (tmpidx < 100) {
 295                 *data = rtl8723au_read8(pAdapter, EFUSE_CTRL);
 296                 bResult = _SUCCESS;
 297         } else {
 298                 *data = 0xff;
 299                 bResult = _FAIL;
 300         }
 301         return bResult;
 302 }
 303
 304 /* Write one byte to reald Efuse. */
 305 int efuse_OneByteWrite23a(struct rtw_adapter *pAdapter, u16 addr, u8 data)
 306 {
 307         u8      tmpidx = 0;
 308         int     bResult;
 309
 310         /* return       0; */
 311
 312         /*  -----------------e-fuse reg ctrl ------------------------- */
 313         /* address */
 314         rtl8723au_write8(pAdapter, EFUSE_CTRL + 1, (u8)(addr & 0xff));
 315         rtl8723au_write8(pAdapter, EFUSE_CTRL + 2,
 316                          (rtl8723au_read8(pAdapter, EFUSE_CTRL + 2) & 0xFC) |
 317                          (u8)((addr >> 8) & 0x03));
 318         rtl8723au_write8(pAdapter, EFUSE_CTRL, data); /* data */
 319
 320         rtl8723au_write8(pAdapter, EFUSE_CTRL + 3, 0xF2); /* write cmd */
 321
 322         while ((0x80 & rtl8723au_read8(pAdapter, EFUSE_CTRL + 3)) &&
 323                (tmpidx < 100)) {
 324                 tmpidx++;
 325         }
 326
 327         if (tmpidx < 100)
 328                 bResult = _SUCCESS;
 329         else
 330                 bResult = _FAIL;
 331
 332         return bResult;
 333 }
 334
 335 /* Read allowed word in current efuse section data. */
 336 void efuse_WordEnableDataRead23a(u8 word_en, u8 *sourdata, u8 *targetdata)
 337 {
 338         if (!(word_en&BIT(0))) {
 339                 targetdata[0] = sourdata[0];
 340                 targetdata[1] = sourdata[1];
 341         }
 342         if (!(word_en&BIT(1))) {
 343                 targetdata[2] = sourdata[2];
 344                 targetdata[3] = sourdata[3];
 345         }
 346         if (!(word_en&BIT(2))) {
 347                 targetdata[4] = sourdata[4];
 348                 targetdata[5] = sourdata[5];
 349         }
 350         if (!(word_en&BIT(3))) {
 351                 targetdata[6] = sourdata[6];
 352                 targetdata[7] = sourdata[7];
 353         }
 354 }
 355
 356 static int efuse_read8(struct rtw_adapter *padapter, u16 address, u8 *value)
 357 {
 358         return efuse_OneByteRead23a(padapter, address, value);
 359 }
 360
 361 static int efuse_write8(struct rtw_adapter *padapter, u16 address, u8 *value)
 362 {
 363         return efuse_OneByteWrite23a(padapter, address, *value);
 364 }
 365
 366 /* read/write raw efuse data */
 367 int rtw_efuse_access23a(struct rtw_adapter *padapter, u8 bWrite, u16 start_addr,
 368                         u16 cnts, u8 *data)
 369 {
 370         int i = 0;
 371         u16 real_content_len = 0, max_available_size = 0;
 372         int res = _FAIL;
 373         int (*rw8)(struct rtw_adapter *, u16, u8*);
 374
 375         EFUSE_GetEfuseDefinition23a(padapter, EFUSE_WIFI,
 376                                  TYPE_EFUSE_REAL_CONTENT_LEN,
 377                                  (void *)&real_content_len);
 378         EFUSE_GetEfuseDefinition23a(padapter, EFUSE_WIFI,
 379                                  TYPE_AVAILABLE_EFUSE_BYTES_TOTAL,
 380                                  (void *)&max_available_size);
 381
 382         if (start_addr > real_content_len)
 383                 return _FAIL;
 384
 385         if (true == bWrite) {
 386                 if ((start_addr + cnts) > max_available_size)
 387                         return _FAIL;
 388                 rw8 = &efuse_write8;
 389         } else
 390                 rw8 = &efuse_read8;
 391
 392         Efuse_PowerSwitch(padapter, bWrite, true);
 393
 394         /* e-fuse one byte read/write */
 395         for (i = 0; i < cnts; i++) {
 396                 if (start_addr >= real_content_len) {
 397                         res = _FAIL;
 398                         break;
 399                 }
 400
 401                 res = rw8(padapter, start_addr++, data++);
 402                 if (res == _FAIL)
 403                         break;
 404         }
 405
 406         Efuse_PowerSwitch(padapter, bWrite, false);
 407
 408         return res;
 409 }
 410
 411 u16 efuse_GetMaxSize23a(struct rtw_adapter *padapter)
 412 {
 413         u16 max_size;
 414
 415         EFUSE_GetEfuseDefinition23a(padapter, EFUSE_WIFI,
 416                                  TYPE_AVAILABLE_EFUSE_BYTES_TOTAL,
 417                                  (void *)&max_size);
 418         return max_size;
 419 }
 420
 421 int rtw_efuse_map_read23a(struct rtw_adapter *padapter,
 422                           u16 addr, u16 cnts, u8 *data)
 423 {
 424         u16 mapLen = 0;
 425
 426         EFUSE_GetEfuseDefinition23a(padapter, EFUSE_WIFI,
 427                                  TYPE_EFUSE_MAP_LEN, (void *)&mapLen);
 428
 429         if ((addr + cnts) > mapLen)
 430                 return _FAIL;
 431
 432         Efuse_PowerSwitch(padapter, false, true);
 433
 434         rtl8723a_readefuse(padapter, EFUSE_WIFI, addr, cnts, data);
 435
 436         Efuse_PowerSwitch(padapter, false, false);
 437
 438         return _SUCCESS;
 439 }
 440
 441 int rtw_BT_efuse_map_read23a(struct rtw_adapter *padapter,
 442                              u16 addr, u16 cnts, u8 *data)
 443 {
 444         u16 mapLen = 0;
 445
 446         EFUSE_GetEfuseDefinition23a(padapter, EFUSE_BT,
 447                                  TYPE_EFUSE_MAP_LEN, (void *)&mapLen);
 448
 449         if ((addr + cnts) > mapLen)
 450                 return _FAIL;
 451
 452         Efuse_PowerSwitch(padapter, false, true);
 453
 454         rtl8723a_readefuse(padapter, EFUSE_BT, addr, cnts, data);
 455
 456         Efuse_PowerSwitch(padapter, false, false);
 457
 458         return _SUCCESS;
 459 }
 460
 461 /* Read All Efuse content */
 462 static void Efuse_ReadAllMap(struct rtw_adapter *pAdapter, u8 efuseType,
 463                              u8 *Efuse)
 464 {
 465         u16     mapLen = 0;
 466
 467         Efuse_PowerSwitch(pAdapter, false, true);
 468
 469         EFUSE_GetEfuseDefinition23a(pAdapter, efuseType, TYPE_EFUSE_MAP_LEN,
 470                                  (void *)&mapLen);
 471
 472         rtl8723a_readefuse(pAdapter, efuseType, 0, mapLen, Efuse);
 473
 474         Efuse_PowerSwitch(pAdapter, false, false);
 475 }
 476
 477 /*
 478  * Functions:   efuse_ShadowRead1Byte
 479  *              efuse_ShadowRead2Byte
 480  *              efuse_ShadowRead4Byte
 481  *
 482  * Read from efuse init map by one/two/four bytes
 483  */
 484 static void efuse_ShadowRead1Byte(struct rtw_adapter *pAdapter, u16 Offset,
 485                                   u8 *Value)
 486 {
 487         struct eeprom_priv *pEEPROM = GET_EEPROM_EFUSE_PRIV(pAdapter);
 488
 489         *Value = pEEPROM->efuse_eeprom_data[Offset];
 490 }
 491
 492 static void efuse_ShadowRead2Byte(struct rtw_adapter *pAdapter, u16 Offset,
 493                                   u16 *Value)
 494 {
 495         struct eeprom_priv *pEEPROM = GET_EEPROM_EFUSE_PRIV(pAdapter);
 496
 497         *Value = pEEPROM->efuse_eeprom_data[Offset];
 498         *Value |= pEEPROM->efuse_eeprom_data[Offset+1]<<8;
 499 }
 500
 501 static void efuse_ShadowRead4Byte(struct rtw_adapter *pAdapter, u16 Offset,
 502                                   u32 *Value)
 503 {
 504         struct eeprom_priv *pEEPROM = GET_EEPROM_EFUSE_PRIV(pAdapter);
 505
 506         *Value = pEEPROM->efuse_eeprom_data[Offset];
 507         *Value |= pEEPROM->efuse_eeprom_data[Offset+1]<<8;
 508         *Value |= pEEPROM->efuse_eeprom_data[Offset+2]<<16;
 509         *Value |= pEEPROM->efuse_eeprom_data[Offset+3]<<24;
 510 }
 511
 512 /* Transfer current EFUSE content to shadow init and modify map. */
 513 void EFUSE_ShadowMapUpdate23a(struct rtw_adapter *pAdapter, u8 efuseType)
 514 {
 515         struct eeprom_priv *pEEPROM = GET_EEPROM_EFUSE_PRIV(pAdapter);
 516         u16     mapLen = 0;
 517
 518         EFUSE_GetEfuseDefinition23a(pAdapter, efuseType,
 519                                  TYPE_EFUSE_MAP_LEN, (void *)&mapLen);
 520
 521         if (pEEPROM->bautoload_fail_flag == true)
 522                 memset(pEEPROM->efuse_eeprom_data, 0xFF, mapLen);
 523         else
 524                 Efuse_ReadAllMap(pAdapter, efuseType,
 525                                  pEEPROM->efuse_eeprom_data);
 526 }
 527
 528 /* Read from efuse init map */
 529 void EFUSE_ShadowRead23a(struct rtw_adapter *pAdapter, u8 Type,
 530                          u16 Offset, u32 *Value)
 531 {
 532         if (Type == 1)
 533                 efuse_ShadowRead1Byte(pAdapter, Offset, (u8 *)Value);
 534         else if (Type == 2)
 535                 efuse_ShadowRead2Byte(pAdapter, Offset, (u16 *)Value);
 536         else if (Type == 4)
 537                 efuse_ShadowRead4Byte(pAdapter, Offset, (u32 *)Value);
 538 }