arch/arm/mach-omap2/hsmmc.c

   1 /*
   2  * linux/arch/arm/mach-omap2/hsmmc.c
   3  *
   4  * Copyright (C) 2007-2008 Texas Instruments
   5  * Copyright (C) 2008 Nokia Corporation
   6  * Author: Texas Instruments
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/slab.h>
  14 #include <linux/string.h>
  15 #include <linux/delay.h>
  16 #include <linux/gpio.h>
  17 #include <linux/platform_data/gpio-omap.h>
  18
  19 #include "soc.h"
  20 #include "omap_device.h"
  21 #include "omap-pm.h"
  22
  23 #include "mux.h"
  24 #include "mmc.h"
  25 #include "hsmmc.h"
  26 #include "control.h"
  27
  28 #if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
  29
  30 static u16 control_pbias_offset;
  31 static u16 control_devconf1_offset;
  32 static u16 control_mmc1;
  33
  34 #define HSMMC_NAME_LEN  9
  35
  36 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
  37
  38 static int hsmmc_get_context_loss(struct device *dev)
  39 {
  40         return omap_pm_get_dev_context_loss_count(dev);
  41 }
  42
  43 #else
  44 #define hsmmc_get_context_loss NULL
  45 #endif
  46
  47 static void omap_hsmmc1_before_set_reg(struct device *dev, int slot,
  48                                   int power_on, int vdd)
  49 {
  50         u32 reg, prog_io;
  51         struct omap_mmc_platform_data *mmc = dev->platform_data;
  52
  53         if (mmc->slots[0].remux)
  54                 mmc->slots[0].remux(dev, slot, power_on);
  55
  56         /*
  57          * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
  58          * card with Vcc regulator (from twl4030 or whatever).  OMAP has both
  59          * 1.8V and 3.0V modes, controlled by the PBIAS register.
  60          *
  61          * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
  62          * is most naturally TWL VSIM; those pins also use PBIAS.
  63          *
  64          * FIXME handle VMMC1A as needed ...
  65          */
  66         if (power_on) {
  67                 if (cpu_is_omap2430()) {
  68                         reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
  69                         if ((1 << vdd) >= MMC_VDD_30_31)
  70                                 reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE;
  71                         else
  72                                 reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE;
  73                         omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
  74                 }
  75
  76                 if (mmc->slots[0].internal_clock) {
  77                         reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
  78                         reg |= OMAP2_MMCSDIO1ADPCLKISEL;
  79                         omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
  80                 }
  81
  82                 reg = omap_ctrl_readl(control_pbias_offset);
  83                 if (cpu_is_omap3630()) {
  84                         /* Set MMC I/O to 52Mhz */
  85                         prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
  86                         prog_io |= OMAP3630_PRG_SDMMC1_SPEEDCTRL;
  87                         omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1);
  88                 } else {
  89                         reg |= OMAP2_PBIASSPEEDCTRL0;
  90                 }
  91                 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
  92                 omap_ctrl_writel(reg, control_pbias_offset);
  93         } else {
  94                 reg = omap_ctrl_readl(control_pbias_offset);
  95                 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
  96                 omap_ctrl_writel(reg, control_pbias_offset);
  97         }
  98 }
  99
 100 static void omap_hsmmc1_after_set_reg(struct device *dev, int slot,
 101                                  int power_on, int vdd)
 102 {
 103         u32 reg;
 104
 105         /* 100ms delay required for PBIAS configuration */
 106         msleep(100);
 107
 108         if (power_on) {
 109                 reg = omap_ctrl_readl(control_pbias_offset);
 110                 reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0);
 111                 if ((1 << vdd) <= MMC_VDD_165_195)
 112                         reg &= ~OMAP2_PBIASLITEVMODE0;
 113                 else
 114                         reg |= OMAP2_PBIASLITEVMODE0;
 115                 omap_ctrl_writel(reg, control_pbias_offset);
 116         } else {
 117                 reg = omap_ctrl_readl(control_pbias_offset);
 118                 reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
 119                         OMAP2_PBIASLITEVMODE0);
 120                 omap_ctrl_writel(reg, control_pbias_offset);
 121         }
 122 }
 123
 124 static void omap4_hsmmc1_before_set_reg(struct device *dev, int slot,
 125                                   int power_on, int vdd)
 126 {
 127         u32 reg;
 128
 129         /*
 130          * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
 131          * card with Vcc regulator (from twl4030 or whatever).  OMAP has both
 132          * 1.8V and 3.0V modes, controlled by the PBIAS register.
 133          */
 134         reg = omap4_ctrl_pad_readl(control_pbias_offset);
 135         reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
 136                 OMAP4_MMC1_PWRDNZ_MASK |
 137                 OMAP4_MMC1_PBIASLITE_VMODE_MASK);
 138         omap4_ctrl_pad_writel(reg, control_pbias_offset);
 139 }
 140
 141 static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
 142                                  int power_on, int vdd)
 143 {
 144         u32 reg;
 145         unsigned long timeout;
 146
 147         if (power_on) {
 148                 reg = omap4_ctrl_pad_readl(control_pbias_offset);
 149                 reg |= OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK;
 150                 if ((1 << vdd) <= MMC_VDD_165_195)
 151                         reg &= ~OMAP4_MMC1_PBIASLITE_VMODE_MASK;
 152                 else
 153                         reg |= OMAP4_MMC1_PBIASLITE_VMODE_MASK;
 154                 reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
 155                         OMAP4_MMC1_PWRDNZ_MASK);
 156                 omap4_ctrl_pad_writel(reg, control_pbias_offset);
 157
 158                 timeout = jiffies + msecs_to_jiffies(5);
 159                 do {
 160                         reg = omap4_ctrl_pad_readl(control_pbias_offset);
 161                         if (!(reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK))
 162                                 break;
 163                         usleep_range(100, 200);
 164                 } while (!time_after(jiffies, timeout));
 165
 166                 if (reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK) {
 167                         pr_err("Pbias Voltage is not same as LDO\n");
 168                         /* Caution : On VMODE_ERROR Power Down MMC IO */
 169                         reg &= ~(OMAP4_MMC1_PWRDNZ_MASK);
 170                         omap4_ctrl_pad_writel(reg, control_pbias_offset);
 171                 }
 172         }
 173 }
 174
 175 static void hsmmc2_select_input_clk_src(struct omap_mmc_platform_data *mmc)
 176 {
 177         u32 reg;
 178
 179         reg = omap_ctrl_readl(control_devconf1_offset);
 180         if (mmc->slots[0].internal_clock)
 181                 reg |= OMAP2_MMCSDIO2ADPCLKISEL;
 182         else
 183                 reg &= ~OMAP2_MMCSDIO2ADPCLKISEL;
 184         omap_ctrl_writel(reg, control_devconf1_offset);
 185 }
 186
 187 static void hsmmc2_before_set_reg(struct device *dev, int slot,
 188                                    int power_on, int vdd)
 189 {
 190         struct omap_mmc_platform_data *mmc = dev->platform_data;
 191
 192         if (mmc->slots[0].remux)
 193                 mmc->slots[0].remux(dev, slot, power_on);
 194
 195         if (power_on)
 196                 hsmmc2_select_input_clk_src(mmc);
 197 }
 198
 199 static int am35x_hsmmc2_set_power(struct device *dev, int slot,
 200                                   int power_on, int vdd)
 201 {
 202         struct omap_mmc_platform_data *mmc = dev->platform_data;
 203
 204         if (power_on)
 205                 hsmmc2_select_input_clk_src(mmc);
 206
 207         return 0;
 208 }
 209
 210 static int nop_mmc_set_power(struct device *dev, int slot, int power_on,
 211                                                         int vdd)
 212 {
 213         return 0;
 214 }
 215
 216 static inline void omap_hsmmc_mux(struct omap_mmc_platform_data *mmc_controller,
 217                         int controller_nr)
 218 {
 219         if (gpio_is_valid(mmc_controller->slots[0].switch_pin) &&
 220                 (mmc_controller->slots[0].switch_pin < OMAP_MAX_GPIO_LINES))
 221                 omap_mux_init_gpio(mmc_controller->slots[0].switch_pin,
 222                                         OMAP_PIN_INPUT_PULLUP);
 223         if (gpio_is_valid(mmc_controller->slots[0].gpio_wp) &&
 224                 (mmc_controller->slots[0].gpio_wp < OMAP_MAX_GPIO_LINES))
 225                 omap_mux_init_gpio(mmc_controller->slots[0].gpio_wp,
 226                                         OMAP_PIN_INPUT_PULLUP);
 227         if (cpu_is_omap34xx()) {
 228                 if (controller_nr == 0) {
 229                         omap_mux_init_signal("sdmmc1_clk",
 230                                 OMAP_PIN_INPUT_PULLUP);
 231                         omap_mux_init_signal("sdmmc1_cmd",
 232                                 OMAP_PIN_INPUT_PULLUP);
 233                         omap_mux_init_signal("sdmmc1_dat0",
 234                                 OMAP_PIN_INPUT_PULLUP);
 235                         if (mmc_controller->slots[0].caps &
 236                                 (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
 237                                 omap_mux_init_signal("sdmmc1_dat1",
 238                                         OMAP_PIN_INPUT_PULLUP);
 239                                 omap_mux_init_signal("sdmmc1_dat2",
 240                                         OMAP_PIN_INPUT_PULLUP);
 241                                 omap_mux_init_signal("sdmmc1_dat3",
 242                                         OMAP_PIN_INPUT_PULLUP);
 243                         }
 244                         if (mmc_controller->slots[0].caps &
 245                                                 MMC_CAP_8_BIT_DATA) {
 246                                 omap_mux_init_signal("sdmmc1_dat4",
 247                                         OMAP_PIN_INPUT_PULLUP);
 248                                 omap_mux_init_signal("sdmmc1_dat5",
 249                                         OMAP_PIN_INPUT_PULLUP);
 250                                 omap_mux_init_signal("sdmmc1_dat6",
 251                                         OMAP_PIN_INPUT_PULLUP);
 252                                 omap_mux_init_signal("sdmmc1_dat7",
 253                                         OMAP_PIN_INPUT_PULLUP);
 254                         }
 255                 }
 256                 if (controller_nr == 1) {
 257                         /* MMC2 */
 258                         omap_mux_init_signal("sdmmc2_clk",
 259                                 OMAP_PIN_INPUT_PULLUP);
 260                         omap_mux_init_signal("sdmmc2_cmd",
 261                                 OMAP_PIN_INPUT_PULLUP);
 262                         omap_mux_init_signal("sdmmc2_dat0",
 263                                 OMAP_PIN_INPUT_PULLUP);
 264
 265                         /*
 266                          * For 8 wire configurations, Lines DAT4, 5, 6 and 7
 267                          * need to be muxed in the board-*.c files
 268                          */
 269                         if (mmc_controller->slots[0].caps &
 270                                 (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
 271                                 omap_mux_init_signal("sdmmc2_dat1",
 272                                         OMAP_PIN_INPUT_PULLUP);
 273                                 omap_mux_init_signal("sdmmc2_dat2",
 274                                         OMAP_PIN_INPUT_PULLUP);
 275                                 omap_mux_init_signal("sdmmc2_dat3",
 276                                         OMAP_PIN_INPUT_PULLUP);
 277                         }
 278                         if (mmc_controller->slots[0].caps &
 279                                                         MMC_CAP_8_BIT_DATA) {
 280                                 omap_mux_init_signal("sdmmc2_dat4.sdmmc2_dat4",
 281                                         OMAP_PIN_INPUT_PULLUP);
 282                                 omap_mux_init_signal("sdmmc2_dat5.sdmmc2_dat5",
 283                                         OMAP_PIN_INPUT_PULLUP);
 284                                 omap_mux_init_signal("sdmmc2_dat6.sdmmc2_dat6",
 285                                         OMAP_PIN_INPUT_PULLUP);
 286                                 omap_mux_init_signal("sdmmc2_dat7.sdmmc2_dat7",
 287                                         OMAP_PIN_INPUT_PULLUP);
 288                         }
 289                 }
 290
 291                 /*
 292                  * For MMC3 the pins need to be muxed in the board-*.c files
 293                  */
 294         }
 295 }
 296
 297 static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
 298                                         struct omap_mmc_platform_data *mmc)
 299 {
 300         char *hc_name;
 301
 302         hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL);
 303         if (!hc_name) {
 304                 pr_err("Cannot allocate memory for controller slot name\n");
 305                 kfree(hc_name);
 306                 return -ENOMEM;
 307         }
 308
 309         if (c->name)
 310                 strncpy(hc_name, c->name, HSMMC_NAME_LEN);
 311         else
 312                 snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i",
 313                                                                 c->mmc, 1);
 314         mmc->slots[0].name = hc_name;
 315         mmc->nr_slots = 1;
 316         mmc->slots[0].caps = c->caps;
 317         mmc->slots[0].pm_caps = c->pm_caps;
 318         mmc->slots[0].internal_clock = !c->ext_clock;
 319         mmc->max_freq = c->max_freq;
 320         if (cpu_is_omap44xx())
 321                 mmc->reg_offset = OMAP4_MMC_REG_OFFSET;
 322         else
 323                 mmc->reg_offset = 0;
 324
 325         mmc->get_context_loss_count = hsmmc_get_context_loss;
 326
 327         mmc->slots[0].switch_pin = c->gpio_cd;
 328         mmc->slots[0].gpio_wp = c->gpio_wp;
 329
 330         mmc->slots[0].remux = c->remux;
 331         mmc->slots[0].init_card = c->init_card;
 332
 333         if (c->cover_only)
 334                 mmc->slots[0].cover = 1;
 335
 336         if (c->nonremovable)
 337                 mmc->slots[0].nonremovable = 1;
 338
 339         if (c->power_saving)
 340                 mmc->slots[0].power_saving = 1;
 341
 342         if (c->no_off)
 343                 mmc->slots[0].no_off = 1;
 344
 345         if (c->no_off_init)
 346                 mmc->slots[0].no_regulator_off_init = c->no_off_init;
 347
 348         if (c->vcc_aux_disable_is_sleep)
 349                 mmc->slots[0].vcc_aux_disable_is_sleep = 1;
 350
 351         /*
 352          * NOTE:  MMC slots should have a Vcc regulator set up.
 353          * This may be from a TWL4030-family chip, another
 354          * controllable regulator, or a fixed supply.
 355          *
 356          * temporary HACK: ocr_mask instead of fixed supply
 357          */
 358         if (soc_is_am35xx())
 359                 mmc->slots[0].ocr_mask = MMC_VDD_165_195 |
 360                                          MMC_VDD_26_27 |
 361                                          MMC_VDD_27_28 |
 362                                          MMC_VDD_29_30 |
 363                                          MMC_VDD_30_31 |
 364                                          MMC_VDD_31_32;
 365         else
 366                 mmc->slots[0].ocr_mask = c->ocr_mask;
 367
 368         if (!soc_is_am35xx())
 369                 mmc->slots[0].features |= HSMMC_HAS_PBIAS;
 370
 371         if (cpu_is_omap44xx() && (omap_rev() > OMAP4430_REV_ES1_0))
 372                 mmc->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
 373
 374         switch (c->mmc) {
 375         case 1:
 376                 if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
 377                         /* on-chip level shifting via PBIAS0/PBIAS1 */
 378                         if (cpu_is_omap44xx()) {
 379                                 mmc->slots[0].before_set_reg =
 380                                                 omap4_hsmmc1_before_set_reg;
 381                                 mmc->slots[0].after_set_reg =
 382                                                 omap4_hsmmc1_after_set_reg;
 383                         } else {
 384                                 mmc->slots[0].before_set_reg =
 385                                                 omap_hsmmc1_before_set_reg;
 386                                 mmc->slots[0].after_set_reg =
 387                                                 omap_hsmmc1_after_set_reg;
 388                         }
 389                 }
 390
 391                 if (soc_is_am35xx())
 392                         mmc->slots[0].set_power = nop_mmc_set_power;
 393
 394                 /* OMAP3630 HSMMC1 supports only 4-bit */
 395                 if (cpu_is_omap3630() &&
 396                                 (c->caps & MMC_CAP_8_BIT_DATA)) {
 397                         c->caps &= ~MMC_CAP_8_BIT_DATA;
 398                         c->caps |= MMC_CAP_4_BIT_DATA;
 399                         mmc->slots[0].caps = c->caps;
 400                 }
 401                 break;
 402         case 2:
 403                 if (soc_is_am35xx())
 404                         mmc->slots[0].set_power = am35x_hsmmc2_set_power;
 405
 406                 if (c->ext_clock)
 407                         c->transceiver = 1;
 408                 if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) {
 409                         c->caps &= ~MMC_CAP_8_BIT_DATA;
 410                         c->caps |= MMC_CAP_4_BIT_DATA;
 411                 }
 412                 if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
 413                         /* off-chip level shifting, or none */
 414                         mmc->slots[0].before_set_reg = hsmmc2_before_set_reg;
 415                         mmc->slots[0].after_set_reg = NULL;
 416                 }
 417                 break;
 418         case 3:
 419         case 4:
 420         case 5:
 421                 mmc->slots[0].before_set_reg = NULL;
 422                 mmc->slots[0].after_set_reg = NULL;
 423                 break;
 424         default:
 425                 pr_err("MMC%d configuration not supported!\n", c->mmc);
 426                 kfree(hc_name);
 427                 return -ENODEV;
 428         }
 429         return 0;
 430 }
 431
 432 static int omap_hsmmc_done;
 433
 434 void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
 435 {
 436         struct platform_device *pdev;
 437         struct omap_mmc_platform_data *mmc_pdata;
 438         int res;
 439
 440         if (omap_hsmmc_done != 1)
 441                 return;
 442
 443         omap_hsmmc_done++;
 444
 445         for (; c->mmc; c++) {
 446                 if (!c->deferred)
 447                         continue;
 448
 449                 pdev = c->pdev;
 450                 if (!pdev)
 451                         continue;
 452
 453                 mmc_pdata = pdev->dev.platform_data;
 454                 if (!mmc_pdata)
 455                         continue;
 456
 457                 mmc_pdata->slots[0].switch_pin = c->gpio_cd;
 458                 mmc_pdata->slots[0].gpio_wp = c->gpio_wp;
 459
 460                 res = omap_device_register(pdev);
 461                 if (res)
 462                         pr_err("Could not late init MMC %s\n",
 463                                c->name);
 464         }
 465 }
 466
 467 #define MAX_OMAP_MMC_HWMOD_NAME_LEN             16
 468
 469 static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
 470                                         int ctrl_nr)
 471 {
 472         struct omap_hwmod *oh;
 473         struct omap_hwmod *ohs[1];
 474         struct omap_device *od;
 475         struct platform_device *pdev;
 476         char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
 477         struct omap_mmc_platform_data *mmc_data;
 478         struct omap_mmc_dev_attr *mmc_dev_attr;
 479         char *name;
 480         int res;
 481
 482         mmc_data = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL);
 483         if (!mmc_data) {
 484                 pr_err("Cannot allocate memory for mmc device!\n");
 485                 return;
 486         }
 487
 488         res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
 489         if (res < 0)
 490                 goto free_mmc;
 491
 492         omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));
 493
 494         name = "omap_hsmmc";
 495         res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
 496                      "mmc%d", ctrl_nr);
 497         WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
 498              "String buffer overflow in MMC%d device setup\n", ctrl_nr);
 499
 500         oh = omap_hwmod_lookup(oh_name);
 501         if (!oh) {
 502                 pr_err("Could not look up %s\n", oh_name);
 503                 goto free_name;
 504         }
 505         ohs[0] = oh;
 506         if (oh->dev_attr != NULL) {
 507                 mmc_dev_attr = oh->dev_attr;
 508                 mmc_data->controller_flags = mmc_dev_attr->flags;
 509                 /*
 510                  * erratum 2.1.1.128 doesn't apply if board has
 511                  * a transceiver is attached
 512                  */
 513                 if (hsmmcinfo->transceiver)
 514                         mmc_data->controller_flags &=
 515                                 ~OMAP_HSMMC_BROKEN_MULTIBLOCK_READ;
 516         }
 517
 518         pdev = platform_device_alloc(name, ctrl_nr - 1);
 519         if (!pdev) {
 520                 pr_err("Could not allocate pdev for %s\n", name);
 521                 goto free_name;
 522         }
 523         dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
 524
 525         od = omap_device_alloc(pdev, ohs, 1);
 526         if (IS_ERR(od)) {
 527                 pr_err("Could not allocate od for %s\n", name);
 528                 goto put_pdev;
 529         }
 530
 531         res = platform_device_add_data(pdev, mmc_data,
 532                               sizeof(struct omap_mmc_platform_data));
 533         if (res) {
 534                 pr_err("Could not add pdata for %s\n", name);
 535                 goto put_pdev;
 536         }
 537
 538         hsmmcinfo->pdev = pdev;
 539
 540         if (hsmmcinfo->deferred)
 541                 goto free_mmc;
 542
 543         res = omap_device_register(pdev);
 544         if (res) {
 545                 pr_err("Could not register od for %s\n", name);
 546                 goto free_od;
 547         }
 548
 549         goto free_mmc;
 550
 551 free_od:
 552         omap_device_delete(od);
 553
 554 put_pdev:
 555         platform_device_put(pdev);
 556
 557 free_name:
 558         kfree(mmc_data->slots[0].name);
 559
 560 free_mmc:
 561         kfree(mmc_data);
 562 }
 563
 564 void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
 565 {
 566         u32 reg;
 567
 568         if (omap_hsmmc_done)
 569                 return;
 570
 571         omap_hsmmc_done = 1;
 572
 573         if (!cpu_is_omap44xx()) {
 574                 if (cpu_is_omap2430()) {
 575                         control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
 576                         control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
 577                 } else {
 578                         control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
 579                         control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
 580                 }
 581         } else {
 582                 control_pbias_offset =
 583                         OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_PBIASLITE;
 584                 control_mmc1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_MMC1;
 585                 reg = omap4_ctrl_pad_readl(control_mmc1);
 586                 reg |= (OMAP4_SDMMC1_PUSTRENGTH_GRP0_MASK |
 587                         OMAP4_SDMMC1_PUSTRENGTH_GRP1_MASK);
 588                 reg &= ~(OMAP4_SDMMC1_PUSTRENGTH_GRP2_MASK |
 589                         OMAP4_SDMMC1_PUSTRENGTH_GRP3_MASK);
 590                 reg |= (OMAP4_SDMMC1_DR0_SPEEDCTRL_MASK |
 591                         OMAP4_SDMMC1_DR1_SPEEDCTRL_MASK |
 592                         OMAP4_SDMMC1_DR2_SPEEDCTRL_MASK);
 593                 omap4_ctrl_pad_writel(reg, control_mmc1);
 594         }
 595
 596         for (; controllers->mmc; controllers++)
 597                 omap_hsmmc_init_one(controllers, controllers->mmc);
 598
 599 }
 600
 601 #endif