drivers/misc/cardreader/rts5261.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* Driver for Realtek PCI-Express card reader
   3  *
   4  * Copyright(c) 2018-2019 Realtek Semiconductor Corp. All rights reserved.
   5  *
   6  * Author:
   7  *   Rui FENG <rui_feng@realsil.com.cn>
   8  *   Wei WANG <wei_wang@realsil.com.cn>
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/delay.h>
  13 #include <linux/rtsx_pci.h>
  14
  15 #include "rts5261.h"
  16 #include "rtsx_pcr.h"
  17
  18 static u8 rts5261_get_ic_version(struct rtsx_pcr *pcr)
  19 {
  20         u8 val;
  21
  22         rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
  23         return val & IC_VERSION_MASK;
  24 }
  25
  26 static void rts5261_fill_driving(struct rtsx_pcr *pcr, u8 voltage)
  27 {
  28         u8 driving_3v3[4][3] = {
  29                 {0x96, 0x96, 0x96},
  30                 {0x96, 0x96, 0x96},
  31                 {0x7F, 0x7F, 0x7F},
  32                 {0x13, 0x13, 0x13},
  33         };
  34         u8 driving_1v8[4][3] = {
  35                 {0xB3, 0xB3, 0xB3},
  36                 {0x3A, 0x3A, 0x3A},
  37                 {0xE6, 0xE6, 0xE6},
  38                 {0x99, 0x99, 0x99},
  39         };
  40         u8 (*driving)[3], drive_sel;
  41
  42         if (voltage == OUTPUT_3V3) {
  43                 driving = driving_3v3;
  44                 drive_sel = pcr->sd30_drive_sel_3v3;
  45         } else {
  46                 driving = driving_1v8;
  47                 drive_sel = pcr->sd30_drive_sel_1v8;
  48         }
  49
  50         rtsx_pci_write_register(pcr, SD30_CLK_DRIVE_SEL,
  51                          0xFF, driving[drive_sel][0]);
  52
  53         rtsx_pci_write_register(pcr, SD30_CMD_DRIVE_SEL,
  54                          0xFF, driving[drive_sel][1]);
  55
  56         rtsx_pci_write_register(pcr, SD30_DAT_DRIVE_SEL,
  57                          0xFF, driving[drive_sel][2]);
  58 }
  59
  60 static void rts5261_force_power_down(struct rtsx_pcr *pcr, u8 pm_state, bool runtime)
  61 {
  62         /* Set relink_time to 0 */
  63         rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 1, MASK_8_BIT_DEF, 0);
  64         rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 2, MASK_8_BIT_DEF, 0);
  65         rtsx_pci_write_register(pcr, AUTOLOAD_CFG_BASE + 3,
  66                                 RELINK_TIME_MASK, 0);
  67
  68         if (pm_state == HOST_ENTER_S3)
  69                 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3,
  70                                         D3_DELINK_MODE_EN, D3_DELINK_MODE_EN);
  71
  72         if (!runtime) {
  73                 rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG1,
  74                                 CD_RESUME_EN_MASK, 0);
  75                 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
  76                 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
  77                                 FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
  78
  79         } else {
  80                 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
  81                                 FORCE_PM_CONTROL | FORCE_PM_VALUE, 0);
  82
  83                 rtsx_pci_write_register(pcr, RTS5261_FW_CTL,
  84                                 RTS5261_INFORM_RTD3_COLD, RTS5261_INFORM_RTD3_COLD);
  85                 rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
  86                                 RTS5261_FORCE_PRSNT_LOW, RTS5261_FORCE_PRSNT_LOW);
  87
  88         }
  89
  90         rtsx_pci_write_register(pcr, RTS5261_REG_FPDCTL,
  91                 SSC_POWER_DOWN, SSC_POWER_DOWN);
  92 }
  93
  94 static int rts5261_enable_auto_blink(struct rtsx_pcr *pcr)
  95 {
  96         return rtsx_pci_write_register(pcr, OLT_LED_CTL,
  97                 LED_SHINE_MASK, LED_SHINE_EN);
  98 }
  99
 100 static int rts5261_disable_auto_blink(struct rtsx_pcr *pcr)
 101 {
 102         return rtsx_pci_write_register(pcr, OLT_LED_CTL,
 103                 LED_SHINE_MASK, LED_SHINE_DISABLE);
 104 }
 105
 106 static int rts5261_turn_on_led(struct rtsx_pcr *pcr)
 107 {
 108         return rtsx_pci_write_register(pcr, GPIO_CTL,
 109                 0x02, 0x02);
 110 }
 111
 112 static int rts5261_turn_off_led(struct rtsx_pcr *pcr)
 113 {
 114         return rtsx_pci_write_register(pcr, GPIO_CTL,
 115                 0x02, 0x00);
 116 }
 117
 118 /* SD Pull Control Enable:
 119  *     SD_DAT[3:0] ==> pull up
 120  *     SD_CD       ==> pull up
 121  *     SD_WP       ==> pull up
 122  *     SD_CMD      ==> pull up
 123  *     SD_CLK      ==> pull down
 124  */
 125 static const u32 rts5261_sd_pull_ctl_enable_tbl[] = {
 126         RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
 127         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
 128         0,
 129 };
 130
 131 /* SD Pull Control Disable:
 132  *     SD_DAT[3:0] ==> pull down
 133  *     SD_CD       ==> pull up
 134  *     SD_WP       ==> pull down
 135  *     SD_CMD      ==> pull down
 136  *     SD_CLK      ==> pull down
 137  */
 138 static const u32 rts5261_sd_pull_ctl_disable_tbl[] = {
 139         RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
 140         RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
 141         0,
 142 };
 143
 144 static int rts5261_sd_set_sample_push_timing_sd30(struct rtsx_pcr *pcr)
 145 {
 146         rtsx_pci_write_register(pcr, SD_CFG1, SD_MODE_SELECT_MASK
 147                 | SD_ASYNC_FIFO_NOT_RST, SD_30_MODE | SD_ASYNC_FIFO_NOT_RST);
 148         rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, CLK_LOW_FREQ);
 149         rtsx_pci_write_register(pcr, CARD_CLK_SOURCE, 0xFF,
 150                         CRC_VAR_CLK0 | SD30_FIX_CLK | SAMPLE_VAR_CLK1);
 151         rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
 152
 153         return 0;
 154 }
 155
 156 static int rts5261_card_power_on(struct rtsx_pcr *pcr, int card)
 157 {
 158         struct rtsx_cr_option *option = &pcr->option;
 159
 160         if (option->ocp_en)
 161                 rtsx_pci_enable_ocp(pcr);
 162
 163         rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0,
 164                 CFG_SD_POW_AUTO_PD, CFG_SD_POW_AUTO_PD);
 165
 166         rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG1,
 167                         RTS5261_LDO1_TUNE_MASK, RTS5261_LDO1_33);
 168         rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
 169                         RTS5261_LDO1_POWERON, RTS5261_LDO1_POWERON);
 170
 171         rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
 172                         RTS5261_LDO3318_POWERON, RTS5261_LDO3318_POWERON);
 173
 174         msleep(20);
 175
 176         rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
 177
 178         /* Initialize SD_CFG1 register */
 179         rtsx_pci_write_register(pcr, SD_CFG1, 0xFF,
 180                         SD_CLK_DIVIDE_128 | SD_20_MODE | SD_BUS_WIDTH_1BIT);
 181
 182         rtsx_pci_write_register(pcr, SD_SAMPLE_POINT_CTL,
 183                         0xFF, SD20_RX_POS_EDGE);
 184         rtsx_pci_write_register(pcr, SD_PUSH_POINT_CTL, 0xFF, 0);
 185         rtsx_pci_write_register(pcr, CARD_STOP, SD_STOP | SD_CLR_ERR,
 186                         SD_STOP | SD_CLR_ERR);
 187
 188         /* Reset SD_CFG3 register */
 189         rtsx_pci_write_register(pcr, SD_CFG3, SD30_CLK_END_EN, 0);
 190         rtsx_pci_write_register(pcr, REG_SD_STOP_SDCLK_CFG,
 191                         SD30_CLK_STOP_CFG_EN | SD30_CLK_STOP_CFG1 |
 192                         SD30_CLK_STOP_CFG0, 0);
 193
 194         if (pcr->extra_caps & EXTRA_CAPS_SD_SDR50 ||
 195             pcr->extra_caps & EXTRA_CAPS_SD_SDR104)
 196                 rts5261_sd_set_sample_push_timing_sd30(pcr);
 197
 198         return 0;
 199 }
 200
 201 static int rts5261_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
 202 {
 203         int err;
 204         u16 val = 0;
 205
 206         rtsx_pci_write_register(pcr, RTS5261_CARD_PWR_CTL,
 207                         RTS5261_PUPDC, RTS5261_PUPDC);
 208
 209         switch (voltage) {
 210         case OUTPUT_3V3:
 211                 rtsx_pci_read_phy_register(pcr, PHY_TUNE, &val);
 212                 val |= PHY_TUNE_SDBUS_33;
 213                 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
 214                 if (err < 0)
 215                         return err;
 216
 217                 rtsx_pci_write_register(pcr, RTS5261_DV3318_CFG,
 218                                 RTS5261_DV3318_TUNE_MASK, RTS5261_DV3318_33);
 219                 rtsx_pci_write_register(pcr, SD_PAD_CTL,
 220                                 SD_IO_USING_1V8, 0);
 221                 break;
 222         case OUTPUT_1V8:
 223                 rtsx_pci_read_phy_register(pcr, PHY_TUNE, &val);
 224                 val &= ~PHY_TUNE_SDBUS_33;
 225                 err = rtsx_pci_write_phy_register(pcr, PHY_TUNE, val);
 226                 if (err < 0)
 227                         return err;
 228
 229                 rtsx_pci_write_register(pcr, RTS5261_DV3318_CFG,
 230                                 RTS5261_DV3318_TUNE_MASK, RTS5261_DV3318_18);
 231                 rtsx_pci_write_register(pcr, SD_PAD_CTL,
 232                                 SD_IO_USING_1V8, SD_IO_USING_1V8);
 233                 break;
 234         default:
 235                 return -EINVAL;
 236         }
 237
 238         /* set pad drive */
 239         rts5261_fill_driving(pcr, voltage);
 240
 241         return 0;
 242 }
 243
 244 static void rts5261_stop_cmd(struct rtsx_pcr *pcr)
 245 {
 246         rtsx_pci_writel(pcr, RTSX_HCBCTLR, STOP_CMD);
 247         rtsx_pci_writel(pcr, RTSX_HDBCTLR, STOP_DMA);
 248         rtsx_pci_write_register(pcr, RTS5260_DMA_RST_CTL_0,
 249                                 RTS5260_DMA_RST | RTS5260_ADMA3_RST,
 250                                 RTS5260_DMA_RST | RTS5260_ADMA3_RST);
 251         rtsx_pci_write_register(pcr, RBCTL, RB_FLUSH, RB_FLUSH);
 252 }
 253
 254 static void rts5261_card_before_power_off(struct rtsx_pcr *pcr)
 255 {
 256         rts5261_stop_cmd(pcr);
 257         rts5261_switch_output_voltage(pcr, OUTPUT_3V3);
 258
 259 }
 260
 261 static void rts5261_enable_ocp(struct rtsx_pcr *pcr)
 262 {
 263         u8 val = 0;
 264
 265         val = SD_OCP_INT_EN | SD_DETECT_EN;
 266         rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
 267                         RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN,
 268                         RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN);
 269         rtsx_pci_write_register(pcr, REG_OCPCTL, 0xFF, val);
 270
 271 }
 272
 273 static void rts5261_disable_ocp(struct rtsx_pcr *pcr)
 274 {
 275         u8 mask = 0;
 276
 277         mask = SD_OCP_INT_EN | SD_DETECT_EN;
 278         rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
 279         rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
 280                         RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN, 0);
 281
 282 }
 283
 284 static int rts5261_card_power_off(struct rtsx_pcr *pcr, int card)
 285 {
 286         int err = 0;
 287
 288         rts5261_card_before_power_off(pcr);
 289         err = rtsx_pci_write_register(pcr, RTS5261_LDO1233318_POW_CTL,
 290                                 RTS5261_LDO_POWERON_MASK, 0);
 291
 292         rtsx_pci_write_register(pcr, REG_CRC_DUMMY_0,
 293                 CFG_SD_POW_AUTO_PD, 0);
 294         if (pcr->option.ocp_en)
 295                 rtsx_pci_disable_ocp(pcr);
 296
 297         return err;
 298 }
 299
 300 static void rts5261_init_ocp(struct rtsx_pcr *pcr)
 301 {
 302         struct rtsx_cr_option *option = &pcr->option;
 303
 304         if (option->ocp_en) {
 305                 u8 mask, val;
 306
 307                 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
 308                         RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN,
 309                         RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN);
 310
 311                 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
 312                         RTS5261_LDO1_OCP_THD_MASK, option->sd_800mA_ocp_thd);
 313
 314                 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
 315                         RTS5261_LDO1_OCP_LMT_THD_MASK,
 316                         RTS5261_LDO1_LMT_THD_2000);
 317
 318                 mask = SD_OCP_GLITCH_MASK;
 319                 val = pcr->hw_param.ocp_glitch;
 320                 rtsx_pci_write_register(pcr, REG_OCPGLITCH, mask, val);
 321
 322                 rts5261_enable_ocp(pcr);
 323         } else {
 324                 rtsx_pci_write_register(pcr, RTS5261_LDO1_CFG0,
 325                         RTS5261_LDO1_OCP_EN | RTS5261_LDO1_OCP_LMT_EN, 0);
 326         }
 327 }
 328
 329 static void rts5261_clear_ocpstat(struct rtsx_pcr *pcr)
 330 {
 331         u8 mask = 0;
 332         u8 val = 0;
 333
 334         mask = SD_OCP_INT_CLR | SD_OC_CLR;
 335         val = SD_OCP_INT_CLR | SD_OC_CLR;
 336
 337         rtsx_pci_write_register(pcr, REG_OCPCTL, mask, val);
 338
 339         udelay(1000);
 340         rtsx_pci_write_register(pcr, REG_OCPCTL, mask, 0);
 341
 342 }
 343
 344 static void rts5261_process_ocp(struct rtsx_pcr *pcr)
 345 {
 346         if (!pcr->option.ocp_en)
 347                 return;
 348
 349         rtsx_pci_get_ocpstat(pcr, &pcr->ocp_stat);
 350
 351         if (pcr->ocp_stat & (SD_OC_NOW | SD_OC_EVER)) {
 352                 rts5261_clear_ocpstat(pcr);
 353                 rts5261_card_power_off(pcr, RTSX_SD_CARD);
 354                 rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, 0);
 355                 pcr->ocp_stat = 0;
 356         }
 357
 358 }
 359
 360 static void rts5261_init_from_hw(struct rtsx_pcr *pcr)
 361 {
 362         struct pci_dev *pdev = pcr->pci;
 363         u32 lval1, lval2, i;
 364         u16 setting_reg1, setting_reg2;
 365         u8 valid, efuse_valid, tmp;
 366
 367         rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
 368                 REG_EFUSE_POR | REG_EFUSE_POWER_MASK,
 369                 REG_EFUSE_POR | REG_EFUSE_POWERON);
 370         udelay(1);
 371         rtsx_pci_write_register(pcr, RTS5261_EFUSE_ADDR,
 372                 RTS5261_EFUSE_ADDR_MASK, 0x00);
 373         rtsx_pci_write_register(pcr, RTS5261_EFUSE_CTL,
 374                 RTS5261_EFUSE_ENABLE | RTS5261_EFUSE_MODE_MASK,
 375                 RTS5261_EFUSE_ENABLE);
 376
 377         /* Wait transfer end */
 378         for (i = 0; i < MAX_RW_REG_CNT; i++) {
 379                 rtsx_pci_read_register(pcr, RTS5261_EFUSE_CTL, &tmp);
 380                 if ((tmp & 0x80) == 0)
 381                         break;
 382         }
 383         rtsx_pci_read_register(pcr, RTS5261_EFUSE_READ_DATA, &tmp);
 384         efuse_valid = ((tmp & 0x0C) >> 2);
 385         pcr_dbg(pcr, "Load efuse valid: 0x%x\n", efuse_valid);
 386
 387         pci_read_config_dword(pdev, PCR_SETTING_REG2, &lval2);
 388         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, lval2);
 389         /* 0x816 */
 390         valid = (u8)((lval2 >> 16) & 0x03);
 391
 392         rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
 393                 REG_EFUSE_POR, 0);
 394         pcr_dbg(pcr, "Disable efuse por!\n");
 395
 396         if (efuse_valid == 2 || efuse_valid == 3) {
 397                 if (valid == 3) {
 398                         /* Bypass efuse */
 399                         setting_reg1 = PCR_SETTING_REG1;
 400                         setting_reg2 = PCR_SETTING_REG2;
 401                 } else {
 402                         /* Use efuse data */
 403                         setting_reg1 = PCR_SETTING_REG4;
 404                         setting_reg2 = PCR_SETTING_REG5;
 405                 }
 406         } else if (efuse_valid == 0) {
 407                 // default
 408                 setting_reg1 = PCR_SETTING_REG1;
 409                 setting_reg2 = PCR_SETTING_REG2;
 410         } else {
 411                 return;
 412         }
 413
 414         pci_read_config_dword(pdev, setting_reg2, &lval2);
 415         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", setting_reg2, lval2);
 416
 417         if (!rts5261_vendor_setting_valid(lval2)) {
 418                 /* Not support MMC default */
 419                 pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
 420                 pcr_dbg(pcr, "skip fetch vendor setting\n");
 421                 return;
 422         }
 423
 424         if (!rts5261_reg_check_mmc_support(lval2))
 425                 pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
 426
 427         pcr->rtd3_en = rts5261_reg_to_rtd3(lval2);
 428
 429         if (rts5261_reg_check_reverse_socket(lval2))
 430                 pcr->flags |= PCR_REVERSE_SOCKET;
 431
 432         pci_read_config_dword(pdev, setting_reg1, &lval1);
 433         pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", setting_reg1, lval1);
 434
 435         pcr->aspm_en = rts5261_reg_to_aspm(lval1);
 436         pcr->sd30_drive_sel_1v8 = rts5261_reg_to_sd30_drive_sel_1v8(lval1);
 437         pcr->sd30_drive_sel_3v3 = rts5261_reg_to_sd30_drive_sel_3v3(lval1);
 438
 439         if (setting_reg1 == PCR_SETTING_REG1) {
 440                 /* store setting */
 441                 rtsx_pci_write_register(pcr, 0xFF0C, 0xFF, (u8)(lval1 & 0xFF));
 442                 rtsx_pci_write_register(pcr, 0xFF0D, 0xFF, (u8)((lval1 >> 8) & 0xFF));
 443                 rtsx_pci_write_register(pcr, 0xFF0E, 0xFF, (u8)((lval1 >> 16) & 0xFF));
 444                 rtsx_pci_write_register(pcr, 0xFF0F, 0xFF, (u8)((lval1 >> 24) & 0xFF));
 445                 rtsx_pci_write_register(pcr, 0xFF10, 0xFF, (u8)(lval2 & 0xFF));
 446                 rtsx_pci_write_register(pcr, 0xFF11, 0xFF, (u8)((lval2 >> 8) & 0xFF));
 447                 rtsx_pci_write_register(pcr, 0xFF12, 0xFF, (u8)((lval2 >> 16) & 0xFF));
 448
 449                 pci_write_config_dword(pdev, PCR_SETTING_REG4, lval1);
 450                 lval2 = lval2 & 0x00FFFFFF;
 451                 pci_write_config_dword(pdev, PCR_SETTING_REG5, lval2);
 452         }
 453 }
 454
 455 static void rts5261_init_from_cfg(struct rtsx_pcr *pcr)
 456 {
 457         struct pci_dev *pdev = pcr->pci;
 458         int l1ss;
 459         u32 lval;
 460         struct rtsx_cr_option *option = &pcr->option;
 461
 462         l1ss = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_L1SS);
 463         if (!l1ss)
 464                 return;
 465
 466         pci_read_config_dword(pdev, l1ss + PCI_L1SS_CTL1, &lval);
 467
 468         if (lval & PCI_L1SS_CTL1_ASPM_L1_1)
 469                 rtsx_set_dev_flag(pcr, ASPM_L1_1_EN);
 470         else
 471                 rtsx_clear_dev_flag(pcr, ASPM_L1_1_EN);
 472
 473         if (lval & PCI_L1SS_CTL1_ASPM_L1_2)
 474                 rtsx_set_dev_flag(pcr, ASPM_L1_2_EN);
 475         else
 476                 rtsx_clear_dev_flag(pcr, ASPM_L1_2_EN);
 477
 478         if (lval & PCI_L1SS_CTL1_PCIPM_L1_1)
 479                 rtsx_set_dev_flag(pcr, PM_L1_1_EN);
 480         else
 481                 rtsx_clear_dev_flag(pcr, PM_L1_1_EN);
 482
 483         if (lval & PCI_L1SS_CTL1_PCIPM_L1_2)
 484                 rtsx_set_dev_flag(pcr, PM_L1_2_EN);
 485         else
 486                 rtsx_clear_dev_flag(pcr, PM_L1_2_EN);
 487
 488         rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, 0xFF, 0);
 489         if (option->ltr_en) {
 490                 u16 val;
 491
 492                 pcie_capability_read_word(pdev, PCI_EXP_DEVCTL2, &val);
 493                 if (val & PCI_EXP_DEVCTL2_LTR_EN) {
 494                         option->ltr_enabled = true;
 495                         option->ltr_active = true;
 496                         rtsx_set_ltr_latency(pcr, option->ltr_active_latency);
 497                 } else {
 498                         option->ltr_enabled = false;
 499                 }
 500         }
 501 }
 502
 503 static int rts5261_extra_init_hw(struct rtsx_pcr *pcr)
 504 {
 505         u32 val;
 506
 507         rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG1,
 508                         CD_RESUME_EN_MASK, CD_RESUME_EN_MASK);
 509
 510         rts5261_init_from_cfg(pcr);
 511         rts5261_init_from_hw(pcr);
 512
 513         /* power off efuse */
 514         rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
 515                         REG_EFUSE_POWER_MASK, REG_EFUSE_POWEROFF);
 516         rtsx_pci_write_register(pcr, L1SUB_CONFIG1,
 517                         AUX_CLK_ACTIVE_SEL_MASK, MAC_CKSW_DONE);
 518         rtsx_pci_write_register(pcr, L1SUB_CONFIG3, 0xFF, 0);
 519
 520         if (is_version_higher_than(pcr, PID_5261, IC_VER_B)) {
 521                 val = rtsx_pci_readl(pcr, RTSX_DUM_REG);
 522                 rtsx_pci_writel(pcr, RTSX_DUM_REG, val | 0x1);
 523         }
 524         rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
 525                         RTS5261_AUX_CLK_16M_EN, 0);
 526
 527         /* Release PRSNT# */
 528         rtsx_pci_write_register(pcr, RTS5261_AUTOLOAD_CFG4,
 529                         RTS5261_FORCE_PRSNT_LOW, 0);
 530         rtsx_pci_write_register(pcr, FUNC_FORCE_CTL,
 531                         FUNC_FORCE_UPME_XMT_DBG, FUNC_FORCE_UPME_XMT_DBG);
 532
 533         rtsx_pci_write_register(pcr, PCLK_CTL,
 534                         PCLK_MODE_SEL, PCLK_MODE_SEL);
 535
 536         rtsx_pci_write_register(pcr, PM_EVENT_DEBUG, PME_DEBUG_0, PME_DEBUG_0);
 537         rtsx_pci_write_register(pcr, PM_CLK_FORCE_CTL, CLK_PM_EN, CLK_PM_EN);
 538
 539         /* LED shine disabled, set initial shine cycle period */
 540         rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x0F, 0x02);
 541
 542         /* Configure driving */
 543         rts5261_fill_driving(pcr, OUTPUT_3V3);
 544
 545         if (pcr->flags & PCR_REVERSE_SOCKET)
 546                 rtsx_pci_write_register(pcr, PETXCFG, 0x30, 0x30);
 547         else
 548                 rtsx_pci_write_register(pcr, PETXCFG, 0x30, 0x00);
 549
 550         rtsx_pci_write_register(pcr, PWD_SUSPEND_EN, 0xFF, 0xFB);
 551
 552         if (pcr->rtd3_en) {
 553                 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x01);
 554                 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
 555                                 FORCE_PM_CONTROL | FORCE_PM_VALUE,
 556                                 FORCE_PM_CONTROL | FORCE_PM_VALUE);
 557         } else {
 558                 rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, 0x01, 0x00);
 559                 rtsx_pci_write_register(pcr, RTS5261_REG_PME_FORCE_CTL,
 560                                 FORCE_PM_CONTROL | FORCE_PM_VALUE, FORCE_PM_CONTROL);
 561         }
 562         rtsx_pci_write_register(pcr, pcr->reg_pm_ctrl3, D3_DELINK_MODE_EN, 0x00);
 563
 564         /* Clear Enter RTD3_cold Information*/
 565         rtsx_pci_write_register(pcr, RTS5261_FW_CTL,
 566                 RTS5261_INFORM_RTD3_COLD, 0);
 567
 568         return 0;
 569 }
 570
 571 static void rts5261_enable_aspm(struct rtsx_pcr *pcr, bool enable)
 572 {
 573         u8 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
 574         u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
 575
 576         if (pcr->aspm_enabled == enable)
 577                 return;
 578
 579         val |= (pcr->aspm_en & 0x02);
 580         rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
 581         pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
 582                                            PCI_EXP_LNKCTL_ASPMC, pcr->aspm_en);
 583         pcr->aspm_enabled = enable;
 584 }
 585
 586 static void rts5261_disable_aspm(struct rtsx_pcr *pcr, bool enable)
 587 {
 588         u8 val = FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
 589         u8 mask = FORCE_ASPM_VAL_MASK | FORCE_ASPM_CTL0 | FORCE_ASPM_CTL1;
 590
 591         if (pcr->aspm_enabled == enable)
 592                 return;
 593
 594         pcie_capability_clear_and_set_word(pcr->pci, PCI_EXP_LNKCTL,
 595                                            PCI_EXP_LNKCTL_ASPMC, 0);
 596         rtsx_pci_write_register(pcr, ASPM_FORCE_CTL, mask, val);
 597         rtsx_pci_write_register(pcr, SD_CFG1, SD_ASYNC_FIFO_NOT_RST, 0);
 598         udelay(10);
 599         pcr->aspm_enabled = enable;
 600 }
 601
 602 static void rts5261_set_aspm(struct rtsx_pcr *pcr, bool enable)
 603 {
 604         if (enable)
 605                 rts5261_enable_aspm(pcr, true);
 606         else
 607                 rts5261_disable_aspm(pcr, false);
 608 }
 609
 610 static void rts5261_set_l1off_cfg_sub_d0(struct rtsx_pcr *pcr, int active)
 611 {
 612         struct rtsx_cr_option *option = &pcr->option;
 613         int aspm_L1_1, aspm_L1_2;
 614         u8 val = 0;
 615
 616         aspm_L1_1 = rtsx_check_dev_flag(pcr, ASPM_L1_1_EN);
 617         aspm_L1_2 = rtsx_check_dev_flag(pcr, ASPM_L1_2_EN);
 618
 619         if (active) {
 620                 /* run, latency: 60us */
 621                 if (aspm_L1_1)
 622                         val = option->ltr_l1off_snooze_sspwrgate;
 623         } else {
 624                 /* l1off, latency: 300us */
 625                 if (aspm_L1_2)
 626                         val = option->ltr_l1off_sspwrgate;
 627         }
 628
 629         rtsx_set_l1off_sub(pcr, val);
 630 }
 631
 632 static const struct pcr_ops rts5261_pcr_ops = {
 633         .turn_on_led = rts5261_turn_on_led,
 634         .turn_off_led = rts5261_turn_off_led,
 635         .extra_init_hw = rts5261_extra_init_hw,
 636         .enable_auto_blink = rts5261_enable_auto_blink,
 637         .disable_auto_blink = rts5261_disable_auto_blink,
 638         .card_power_on = rts5261_card_power_on,
 639         .card_power_off = rts5261_card_power_off,
 640         .switch_output_voltage = rts5261_switch_output_voltage,
 641         .force_power_down = rts5261_force_power_down,
 642         .stop_cmd = rts5261_stop_cmd,
 643         .set_aspm = rts5261_set_aspm,
 644         .set_l1off_cfg_sub_d0 = rts5261_set_l1off_cfg_sub_d0,
 645         .enable_ocp = rts5261_enable_ocp,
 646         .disable_ocp = rts5261_disable_ocp,
 647         .init_ocp = rts5261_init_ocp,
 648         .process_ocp = rts5261_process_ocp,
 649         .clear_ocpstat = rts5261_clear_ocpstat,
 650 };
 651
 652 static inline u8 double_ssc_depth(u8 depth)
 653 {
 654         return ((depth > 1) ? (depth - 1) : depth);
 655 }
 656
 657 int rts5261_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
 658                 u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
 659 {
 660         int err, clk;
 661         u16 n;
 662         u8 clk_divider, mcu_cnt, div;
 663         static const u8 depth[] = {
 664                 [RTSX_SSC_DEPTH_4M] = RTS5261_SSC_DEPTH_4M,
 665                 [RTSX_SSC_DEPTH_2M] = RTS5261_SSC_DEPTH_2M,
 666                 [RTSX_SSC_DEPTH_1M] = RTS5261_SSC_DEPTH_1M,
 667                 [RTSX_SSC_DEPTH_500K] = RTS5261_SSC_DEPTH_512K,
 668         };
 669
 670         if (initial_mode) {
 671                 /* We use 250k(around) here, in initial stage */
 672                 if (is_version_higher_than(pcr, PID_5261, IC_VER_C)) {
 673                         clk_divider = SD_CLK_DIVIDE_256;
 674                         card_clock = 60000000;
 675                 } else {
 676                         clk_divider = SD_CLK_DIVIDE_128;
 677                         card_clock = 30000000;
 678                 }
 679         } else {
 680                 clk_divider = SD_CLK_DIVIDE_0;
 681         }
 682         err = rtsx_pci_write_register(pcr, SD_CFG1,
 683                         SD_CLK_DIVIDE_MASK, clk_divider);
 684         if (err < 0)
 685                 return err;
 686
 687         card_clock /= 1000000;
 688         pcr_dbg(pcr, "Switch card clock to %dMHz\n", card_clock);
 689
 690         clk = card_clock;
 691         if (!initial_mode && double_clk)
 692                 clk = card_clock * 2;
 693         pcr_dbg(pcr, "Internal SSC clock: %dMHz (cur_clock = %d)\n",
 694                 clk, pcr->cur_clock);
 695
 696         if (clk == pcr->cur_clock)
 697                 return 0;
 698
 699         if (pcr->ops->conv_clk_and_div_n)
 700                 n = pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
 701         else
 702                 n = clk - 4;
 703         if ((clk <= 4) || (n > 396))
 704                 return -EINVAL;
 705
 706         mcu_cnt = 125/clk + 3;
 707         if (mcu_cnt > 15)
 708                 mcu_cnt = 15;
 709
 710         div = CLK_DIV_1;
 711         while ((n < MIN_DIV_N_PCR - 4) && (div < CLK_DIV_8)) {
 712                 if (pcr->ops->conv_clk_and_div_n) {
 713                         int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
 714                                         DIV_N_TO_CLK) * 2;
 715                         n = pcr->ops->conv_clk_and_div_n(dbl_clk,
 716                                         CLK_TO_DIV_N);
 717                 } else {
 718                         n = (n + 4) * 2 - 4;
 719                 }
 720                 div++;
 721         }
 722
 723         n = (n / 2) - 1;
 724         pcr_dbg(pcr, "n = %d, div = %d\n", n, div);
 725
 726         ssc_depth = depth[ssc_depth];
 727         if (double_clk)
 728                 ssc_depth = double_ssc_depth(ssc_depth);
 729
 730         if (ssc_depth) {
 731                 if (div == CLK_DIV_2) {
 732                         if (ssc_depth > 1)
 733                                 ssc_depth -= 1;
 734                         else
 735                                 ssc_depth = RTS5261_SSC_DEPTH_8M;
 736                 } else if (div == CLK_DIV_4) {
 737                         if (ssc_depth > 2)
 738                                 ssc_depth -= 2;
 739                         else
 740                                 ssc_depth = RTS5261_SSC_DEPTH_8M;
 741                 } else if (div == CLK_DIV_8) {
 742                         if (ssc_depth > 3)
 743                                 ssc_depth -= 3;
 744                         else
 745                                 ssc_depth = RTS5261_SSC_DEPTH_8M;
 746                 }
 747         } else {
 748                 ssc_depth = 0;
 749         }
 750         pcr_dbg(pcr, "ssc_depth = %d\n", ssc_depth);
 751
 752         rtsx_pci_init_cmd(pcr);
 753         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL,
 754                                 CLK_LOW_FREQ, CLK_LOW_FREQ);
 755         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_DIV,
 756                         0xFF, (div << 4) | mcu_cnt);
 757         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, 0);
 758         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL2,
 759                         SSC_DEPTH_MASK, ssc_depth);
 760         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_DIV_N_0, 0xFF, n);
 761         rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SSC_CTL1, SSC_RSTB, SSC_RSTB);
 762         if (vpclk) {
 763                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 764                                 PHASE_NOT_RESET, 0);
 765                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
 766                                 PHASE_NOT_RESET, 0);
 767                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 768                                 PHASE_NOT_RESET, PHASE_NOT_RESET);
 769                 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK1_CTL,
 770                                 PHASE_NOT_RESET, PHASE_NOT_RESET);
 771         }
 772
 773         err = rtsx_pci_send_cmd(pcr, 2000);
 774         if (err < 0)
 775                 return err;
 776
 777         /* Wait SSC clock stable */
 778         udelay(SSC_CLOCK_STABLE_WAIT);
 779         err = rtsx_pci_write_register(pcr, CLK_CTL, CLK_LOW_FREQ, 0);
 780         if (err < 0)
 781                 return err;
 782
 783         pcr->cur_clock = clk;
 784         return 0;
 785
 786 }
 787
 788 void rts5261_init_params(struct rtsx_pcr *pcr)
 789 {
 790         struct rtsx_cr_option *option = &pcr->option;
 791         struct rtsx_hw_param *hw_param = &pcr->hw_param;
 792         u8 val;
 793
 794         pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
 795         rtsx_pci_read_register(pcr, RTS5261_FW_STATUS, &val);
 796         if (!(val & RTS5261_EXPRESS_LINK_FAIL_MASK))
 797                 pcr->extra_caps |= EXTRA_CAPS_SD_EXPRESS;
 798         pcr->num_slots = 1;
 799         pcr->ops = &rts5261_pcr_ops;
 800
 801         pcr->flags = 0;
 802         pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
 803         pcr->sd30_drive_sel_1v8 = 0x00;
 804         pcr->sd30_drive_sel_3v3 = 0x00;
 805         pcr->aspm_en = ASPM_L1_EN;
 806         pcr->aspm_mode = ASPM_MODE_REG;
 807         pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 11);
 808         pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
 809
 810         pcr->ic_version = rts5261_get_ic_version(pcr);
 811         pcr->sd_pull_ctl_enable_tbl = rts5261_sd_pull_ctl_enable_tbl;
 812         pcr->sd_pull_ctl_disable_tbl = rts5261_sd_pull_ctl_disable_tbl;
 813
 814         pcr->reg_pm_ctrl3 = RTS5261_AUTOLOAD_CFG3;
 815
 816         option->dev_flags = (LTR_L1SS_PWR_GATE_CHECK_CARD_EN
 817                                 | LTR_L1SS_PWR_GATE_EN);
 818         option->ltr_en = true;
 819
 820         /* init latency of active, idle, L1OFF to 60us, 300us, 3ms */
 821         option->ltr_active_latency = LTR_ACTIVE_LATENCY_DEF;
 822         option->ltr_idle_latency = LTR_IDLE_LATENCY_DEF;
 823         option->ltr_l1off_latency = LTR_L1OFF_LATENCY_DEF;
 824         option->l1_snooze_delay = L1_SNOOZE_DELAY_DEF;
 825         option->ltr_l1off_sspwrgate = 0x7F;
 826         option->ltr_l1off_snooze_sspwrgate = 0x78;
 827
 828         option->ocp_en = 1;
 829         hw_param->interrupt_en |= SD_OC_INT_EN;
 830         hw_param->ocp_glitch =  SD_OCP_GLITCH_800U;
 831         option->sd_800mA_ocp_thd =  RTS5261_LDO1_OCP_THD_1040;
 832 }