drivers/mmc/host/sdhci-pci-o2micro.c

   1 /*
   2  * Copyright (C) 2013 BayHub Technology Ltd.
   3  *
   4  * Authors: Peter Guo <peter.guo@bayhubtech.com>
   5  *          Adam Lee <adam.lee@canonical.com>
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <linux/pci.h>
  19
  20 #include "sdhci.h"
  21 #include "sdhci-pci.h"
  22
  23 /*
  24  * O2Micro device registers
  25  */
  26
  27 #define O2_SD_MISC_REG5         0x64
  28 #define O2_SD_LD0_CTRL          0x68
  29 #define O2_SD_DEV_CTRL          0x88
  30 #define O2_SD_LOCK_WP           0xD3
  31 #define O2_SD_TEST_REG          0xD4
  32 #define O2_SD_FUNC_REG0         0xDC
  33 #define O2_SD_MULTI_VCC3V       0xEE
  34 #define O2_SD_CLKREQ            0xEC
  35 #define O2_SD_CAPS              0xE0
  36 #define O2_SD_ADMA1             0xE2
  37 #define O2_SD_ADMA2             0xE7
  38 #define O2_SD_INF_MOD           0xF1
  39 #define O2_SD_MISC_CTRL4        0xFC
  40 #define O2_SD_TUNING_CTRL       0x300
  41 #define O2_SD_PLL_SETTING       0x304
  42 #define O2_SD_CLK_SETTING       0x328
  43 #define O2_SD_CAP_REG2          0x330
  44 #define O2_SD_CAP_REG0          0x334
  45 #define O2_SD_UHS1_CAP_SETTING  0x33C
  46 #define O2_SD_DELAY_CTRL        0x350
  47 #define O2_SD_UHS2_L1_CTRL      0x35C
  48 #define O2_SD_FUNC_REG3         0x3E0
  49 #define O2_SD_FUNC_REG4         0x3E4
  50 #define O2_SD_LED_ENABLE        BIT(6)
  51 #define O2_SD_FREG0_LEDOFF      BIT(13)
  52 #define O2_SD_FREG4_ENABLE_CLK_SET      BIT(22)
  53
  54 #define O2_SD_VENDOR_SETTING    0x110
  55 #define O2_SD_VENDOR_SETTING2   0x1C8
  56
  57 static void o2_pci_set_baseclk(struct sdhci_pci_chip *chip, u32 value)
  58 {
  59         u32 scratch_32;
  60         pci_read_config_dword(chip->pdev,
  61                               O2_SD_PLL_SETTING, &scratch_32);
  62
  63         scratch_32 &= 0x0000FFFF;
  64         scratch_32 |= value;
  65
  66         pci_write_config_dword(chip->pdev,
  67                                O2_SD_PLL_SETTING, scratch_32);
  68 }
  69
  70 static void o2_pci_led_enable(struct sdhci_pci_chip *chip)
  71 {
  72         int ret;
  73         u32 scratch_32;
  74
  75         /* Set led of SD host function enable */
  76         ret = pci_read_config_dword(chip->pdev,
  77                                     O2_SD_FUNC_REG0, &scratch_32);
  78         if (ret)
  79                 return;
  80
  81         scratch_32 &= ~O2_SD_FREG0_LEDOFF;
  82         pci_write_config_dword(chip->pdev,
  83                                O2_SD_FUNC_REG0, scratch_32);
  84
  85         ret = pci_read_config_dword(chip->pdev,
  86                                     O2_SD_TEST_REG, &scratch_32);
  87         if (ret)
  88                 return;
  89
  90         scratch_32 |= O2_SD_LED_ENABLE;
  91         pci_write_config_dword(chip->pdev,
  92                                O2_SD_TEST_REG, scratch_32);
  93
  94 }
  95
  96 static void sdhci_pci_o2_fujin2_pci_init(struct sdhci_pci_chip *chip)
  97 {
  98         u32 scratch_32;
  99         int ret;
 100         /* Improve write performance for SD3.0 */
 101         ret = pci_read_config_dword(chip->pdev, O2_SD_DEV_CTRL, &scratch_32);
 102         if (ret)
 103                 return;
 104         scratch_32 &= ~((1 << 12) | (1 << 13) | (1 << 14));
 105         pci_write_config_dword(chip->pdev, O2_SD_DEV_CTRL, scratch_32);
 106
 107         /* Enable Link abnormal reset generating Reset */
 108         ret = pci_read_config_dword(chip->pdev, O2_SD_MISC_REG5, &scratch_32);
 109         if (ret)
 110                 return;
 111         scratch_32 &= ~((1 << 19) | (1 << 11));
 112         scratch_32 |= (1 << 10);
 113         pci_write_config_dword(chip->pdev, O2_SD_MISC_REG5, scratch_32);
 114
 115         /* set card power over current protection */
 116         ret = pci_read_config_dword(chip->pdev, O2_SD_TEST_REG, &scratch_32);
 117         if (ret)
 118                 return;
 119         scratch_32 |= (1 << 4);
 120         pci_write_config_dword(chip->pdev, O2_SD_TEST_REG, scratch_32);
 121
 122         /* adjust the output delay for SD mode */
 123         pci_write_config_dword(chip->pdev, O2_SD_DELAY_CTRL, 0x00002492);
 124
 125         /* Set the output voltage setting of Aux 1.2v LDO */
 126         ret = pci_read_config_dword(chip->pdev, O2_SD_LD0_CTRL, &scratch_32);
 127         if (ret)
 128                 return;
 129         scratch_32 &= ~(3 << 12);
 130         pci_write_config_dword(chip->pdev, O2_SD_LD0_CTRL, scratch_32);
 131
 132         /* Set Max power supply capability of SD host */
 133         ret = pci_read_config_dword(chip->pdev, O2_SD_CAP_REG0, &scratch_32);
 134         if (ret)
 135                 return;
 136         scratch_32 &= ~(0x01FE);
 137         scratch_32 |= 0x00CC;
 138         pci_write_config_dword(chip->pdev, O2_SD_CAP_REG0, scratch_32);
 139         /* Set DLL Tuning Window */
 140         ret = pci_read_config_dword(chip->pdev,
 141                                     O2_SD_TUNING_CTRL, &scratch_32);
 142         if (ret)
 143                 return;
 144         scratch_32 &= ~(0x000000FF);
 145         scratch_32 |= 0x00000066;
 146         pci_write_config_dword(chip->pdev, O2_SD_TUNING_CTRL, scratch_32);
 147
 148         /* Set UHS2 T_EIDLE */
 149         ret = pci_read_config_dword(chip->pdev,
 150                                     O2_SD_UHS2_L1_CTRL, &scratch_32);
 151         if (ret)
 152                 return;
 153         scratch_32 &= ~(0x000000FC);
 154         scratch_32 |= 0x00000084;
 155         pci_write_config_dword(chip->pdev, O2_SD_UHS2_L1_CTRL, scratch_32);
 156
 157         /* Set UHS2 Termination */
 158         ret = pci_read_config_dword(chip->pdev, O2_SD_FUNC_REG3, &scratch_32);
 159         if (ret)
 160                 return;
 161         scratch_32 &= ~((1 << 21) | (1 << 30));
 162
 163         pci_write_config_dword(chip->pdev, O2_SD_FUNC_REG3, scratch_32);
 164
 165         /* Set L1 Entrance Timer */
 166         ret = pci_read_config_dword(chip->pdev, O2_SD_CAPS, &scratch_32);
 167         if (ret)
 168                 return;
 169         scratch_32 &= ~(0xf0000000);
 170         scratch_32 |= 0x30000000;
 171         pci_write_config_dword(chip->pdev, O2_SD_CAPS, scratch_32);
 172
 173         ret = pci_read_config_dword(chip->pdev,
 174                                     O2_SD_MISC_CTRL4, &scratch_32);
 175         if (ret)
 176                 return;
 177         scratch_32 &= ~(0x000f0000);
 178         scratch_32 |= 0x00080000;
 179         pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL4, scratch_32);
 180 }
 181
 182 int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot)
 183 {
 184         struct sdhci_pci_chip *chip;
 185         struct sdhci_host *host;
 186         u32 reg;
 187
 188         chip = slot->chip;
 189         host = slot->host;
 190         switch (chip->pdev->device) {
 191         case PCI_DEVICE_ID_O2_SDS0:
 192         case PCI_DEVICE_ID_O2_SEABIRD0:
 193         case PCI_DEVICE_ID_O2_SEABIRD1:
 194         case PCI_DEVICE_ID_O2_SDS1:
 195         case PCI_DEVICE_ID_O2_FUJIN2:
 196                 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING);
 197                 if (reg & 0x1)
 198                         host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
 199
 200                 if (chip->pdev->device != PCI_DEVICE_ID_O2_FUJIN2)
 201                         break;
 202                 /* set dll watch dog timer */
 203                 reg = sdhci_readl(host, O2_SD_VENDOR_SETTING2);
 204                 reg |= (1 << 12);
 205                 sdhci_writel(host, reg, O2_SD_VENDOR_SETTING2);
 206
 207                 break;
 208         default:
 209                 break;
 210         }
 211
 212         return 0;
 213 }
 214
 215 int sdhci_pci_o2_probe(struct sdhci_pci_chip *chip)
 216 {
 217         int ret;
 218         u8 scratch;
 219         u32 scratch_32;
 220
 221         switch (chip->pdev->device) {
 222         case PCI_DEVICE_ID_O2_8220:
 223         case PCI_DEVICE_ID_O2_8221:
 224         case PCI_DEVICE_ID_O2_8320:
 225         case PCI_DEVICE_ID_O2_8321:
 226                 /* This extra setup is required due to broken ADMA. */
 227                 ret = pci_read_config_byte(chip->pdev,
 228                                 O2_SD_LOCK_WP, &scratch);
 229                 if (ret)
 230                         return ret;
 231                 scratch &= 0x7f;
 232                 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
 233
 234                 /* Set Multi 3 to VCC3V# */
 235                 pci_write_config_byte(chip->pdev, O2_SD_MULTI_VCC3V, 0x08);
 236
 237                 /* Disable CLK_REQ# support after media DET */
 238                 ret = pci_read_config_byte(chip->pdev,
 239                                 O2_SD_CLKREQ, &scratch);
 240                 if (ret)
 241                         return ret;
 242                 scratch |= 0x20;
 243                 pci_write_config_byte(chip->pdev, O2_SD_CLKREQ, scratch);
 244
 245                 /* Choose capabilities, enable SDMA.  We have to write 0x01
 246                  * to the capabilities register first to unlock it.
 247                  */
 248                 ret = pci_read_config_byte(chip->pdev, O2_SD_CAPS, &scratch);
 249                 if (ret)
 250                         return ret;
 251                 scratch |= 0x01;
 252                 pci_write_config_byte(chip->pdev, O2_SD_CAPS, scratch);
 253                 pci_write_config_byte(chip->pdev, O2_SD_CAPS, 0x73);
 254
 255                 /* Disable ADMA1/2 */
 256                 pci_write_config_byte(chip->pdev, O2_SD_ADMA1, 0x39);
 257                 pci_write_config_byte(chip->pdev, O2_SD_ADMA2, 0x08);
 258
 259                 /* Disable the infinite transfer mode */
 260                 ret = pci_read_config_byte(chip->pdev,
 261                                 O2_SD_INF_MOD, &scratch);
 262                 if (ret)
 263                         return ret;
 264                 scratch |= 0x08;
 265                 pci_write_config_byte(chip->pdev, O2_SD_INF_MOD, scratch);
 266
 267                 /* Lock WP */
 268                 ret = pci_read_config_byte(chip->pdev,
 269                                 O2_SD_LOCK_WP, &scratch);
 270                 if (ret)
 271                         return ret;
 272                 scratch |= 0x80;
 273                 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
 274                 break;
 275         case PCI_DEVICE_ID_O2_SDS0:
 276         case PCI_DEVICE_ID_O2_SDS1:
 277         case PCI_DEVICE_ID_O2_FUJIN2:
 278                 /* UnLock WP */
 279                 ret = pci_read_config_byte(chip->pdev,
 280                                 O2_SD_LOCK_WP, &scratch);
 281                 if (ret)
 282                         return ret;
 283
 284                 scratch &= 0x7f;
 285                 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
 286
 287                 /* DevId=8520 subId= 0x11 or 0x12  Type Chip support */
 288                 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2) {
 289                         ret = pci_read_config_dword(chip->pdev,
 290                                                     O2_SD_FUNC_REG0,
 291                                                     &scratch_32);
 292                         scratch_32 = ((scratch_32 & 0xFF000000) >> 24);
 293
 294                         /* Check Whether subId is 0x11 or 0x12 */
 295                         if ((scratch_32 == 0x11) || (scratch_32 == 0x12)) {
 296                                 scratch_32 = 0x2c280000;
 297
 298                                 /* Set Base Clock to 208MZ */
 299                                 o2_pci_set_baseclk(chip, scratch_32);
 300                                 ret = pci_read_config_dword(chip->pdev,
 301                                                             O2_SD_FUNC_REG4,
 302                                                             &scratch_32);
 303
 304                                 /* Enable Base Clk setting change */
 305                                 scratch_32 |= O2_SD_FREG4_ENABLE_CLK_SET;
 306                                 pci_write_config_dword(chip->pdev,
 307                                                        O2_SD_FUNC_REG4,
 308                                                        scratch_32);
 309
 310                                 /* Set Tuning Window to 4 */
 311                                 pci_write_config_byte(chip->pdev,
 312                                                       O2_SD_TUNING_CTRL, 0x44);
 313
 314                                 break;
 315                         }
 316                 }
 317
 318                 /* Enable 8520 led function */
 319                 o2_pci_led_enable(chip);
 320
 321                 /* Set timeout CLK */
 322                 ret = pci_read_config_dword(chip->pdev,
 323                                             O2_SD_CLK_SETTING, &scratch_32);
 324                 if (ret)
 325                         return ret;
 326
 327                 scratch_32 &= ~(0xFF00);
 328                 scratch_32 |= 0x07E0C800;
 329                 pci_write_config_dword(chip->pdev,
 330                                        O2_SD_CLK_SETTING, scratch_32);
 331
 332                 ret = pci_read_config_dword(chip->pdev,
 333                                             O2_SD_CLKREQ, &scratch_32);
 334                 if (ret)
 335                         return ret;
 336                 scratch_32 |= 0x3;
 337                 pci_write_config_dword(chip->pdev, O2_SD_CLKREQ, scratch_32);
 338
 339                 ret = pci_read_config_dword(chip->pdev,
 340                                             O2_SD_PLL_SETTING, &scratch_32);
 341                 if (ret)
 342                         return ret;
 343
 344                 scratch_32 &= ~(0x1F3F070E);
 345                 scratch_32 |= 0x18270106;
 346                 pci_write_config_dword(chip->pdev,
 347                                        O2_SD_PLL_SETTING, scratch_32);
 348
 349                 /* Disable UHS1 funciton */
 350                 ret = pci_read_config_dword(chip->pdev,
 351                                             O2_SD_CAP_REG2, &scratch_32);
 352                 if (ret)
 353                         return ret;
 354                 scratch_32 &= ~(0xE0);
 355                 pci_write_config_dword(chip->pdev,
 356                                        O2_SD_CAP_REG2, scratch_32);
 357
 358                 if (chip->pdev->device == PCI_DEVICE_ID_O2_FUJIN2)
 359                         sdhci_pci_o2_fujin2_pci_init(chip);
 360
 361                 /* Lock WP */
 362                 ret = pci_read_config_byte(chip->pdev,
 363                                            O2_SD_LOCK_WP, &scratch);
 364                 if (ret)
 365                         return ret;
 366                 scratch |= 0x80;
 367                 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
 368                 break;
 369         case PCI_DEVICE_ID_O2_SEABIRD0:
 370         case PCI_DEVICE_ID_O2_SEABIRD1:
 371                 /* UnLock WP */
 372                 ret = pci_read_config_byte(chip->pdev,
 373                                 O2_SD_LOCK_WP, &scratch);
 374                 if (ret)
 375                         return ret;
 376
 377                 scratch &= 0x7f;
 378                 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
 379
 380                 ret = pci_read_config_dword(chip->pdev,
 381                                             O2_SD_PLL_SETTING, &scratch_32);
 382
 383                 if ((scratch_32 & 0xff000000) == 0x01000000) {
 384                         scratch_32 &= 0x0000FFFF;
 385                         scratch_32 |= 0x1F340000;
 386
 387                         pci_write_config_dword(chip->pdev,
 388                                                O2_SD_PLL_SETTING, scratch_32);
 389                 } else {
 390                         scratch_32 &= 0x0000FFFF;
 391                         scratch_32 |= 0x2c280000;
 392
 393                         pci_write_config_dword(chip->pdev,
 394                                                O2_SD_PLL_SETTING, scratch_32);
 395
 396                         ret = pci_read_config_dword(chip->pdev,
 397                                                     O2_SD_FUNC_REG4,
 398                                                     &scratch_32);
 399                         scratch_32 |= (1 << 22);
 400                         pci_write_config_dword(chip->pdev,
 401                                                O2_SD_FUNC_REG4, scratch_32);
 402                 }
 403
 404                 /* Set Tuning Windows to 5 */
 405                 pci_write_config_byte(chip->pdev,
 406                                 O2_SD_TUNING_CTRL, 0x55);
 407                 /* Lock WP */
 408                 ret = pci_read_config_byte(chip->pdev,
 409                                            O2_SD_LOCK_WP, &scratch);
 410                 if (ret)
 411                         return ret;
 412                 scratch |= 0x80;
 413                 pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
 414                 break;
 415         }
 416
 417         return 0;
 418 }
 419
 420 #ifdef CONFIG_PM_SLEEP
 421 int sdhci_pci_o2_resume(struct sdhci_pci_chip *chip)
 422 {
 423         sdhci_pci_o2_probe(chip);
 424         return sdhci_pci_resume_host(chip);
 425 }
 426 #endif