drivers/mmc/omap3_mmc.c

   1 /*
   2  * (C) Copyright 2008
   3  * Texas Instruments, <www.ti.com>
   4  * Syed Mohammed Khasim <khasim@ti.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation's version 2 of
  12  * the License.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <config.h>
  26 #include <common.h>
  27 #include <fat.h>
  28 #include <mmc.h>
  29 #include <part.h>
  30 #include <i2c.h>
  31 #include <twl4030.h>
  32 #include <asm/io.h>
  33 #include <asm/arch/mmc.h>
  34
  35 const unsigned short mmc_transspeed_val[15][4] = {
  36         {CLKD(10, 1), CLKD(10, 10), CLKD(10, 100), CLKD(10, 1000)},
  37         {CLKD(12, 1), CLKD(12, 10), CLKD(12, 100), CLKD(12, 1000)},
  38         {CLKD(13, 1), CLKD(13, 10), CLKD(13, 100), CLKD(13, 1000)},
  39         {CLKD(15, 1), CLKD(15, 10), CLKD(15, 100), CLKD(15, 1000)},
  40         {CLKD(20, 1), CLKD(20, 10), CLKD(20, 100), CLKD(20, 1000)},
  41         {CLKD(26, 1), CLKD(26, 10), CLKD(26, 100), CLKD(26, 1000)},
  42         {CLKD(30, 1), CLKD(30, 10), CLKD(30, 100), CLKD(30, 1000)},
  43         {CLKD(35, 1), CLKD(35, 10), CLKD(35, 100), CLKD(35, 1000)},
  44         {CLKD(40, 1), CLKD(40, 10), CLKD(40, 100), CLKD(40, 1000)},
  45         {CLKD(45, 1), CLKD(45, 10), CLKD(45, 100), CLKD(45, 1000)},
  46         {CLKD(52, 1), CLKD(52, 10), CLKD(52, 100), CLKD(52, 1000)},
  47         {CLKD(55, 1), CLKD(55, 10), CLKD(55, 100), CLKD(55, 1000)},
  48         {CLKD(60, 1), CLKD(60, 10), CLKD(60, 100), CLKD(60, 1000)},
  49         {CLKD(70, 1), CLKD(70, 10), CLKD(70, 100), CLKD(70, 1000)},
  50         {CLKD(80, 1), CLKD(80, 10), CLKD(80, 100), CLKD(80, 1000)}
  51 };
  52
  53 mmc_card_data cur_card_data;
  54 static block_dev_desc_t mmc_blk_dev;
  55 static hsmmc_t *mmc_base = (hsmmc_t *)OMAP_HSMMC_BASE;
  56
  57 block_dev_desc_t *mmc_get_dev(int dev)
  58 {
  59         return (block_dev_desc_t *) &mmc_blk_dev;
  60 }
  61
  62 unsigned char mmc_board_init(void)
  63 {
  64         t2_t *t2_base = (t2_t *)T2_BASE;
  65
  66 #if defined(CONFIG_TWL4030_POWER)
  67         twl4030_power_mmc_init();
  68 #endif
  69
  70         writel(readl(&t2_base->pbias_lite) | PBIASLITEPWRDNZ1 |
  71                 PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
  72                 &t2_base->pbias_lite);
  73
  74         writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
  75                 &t2_base->devconf0);
  76
  77         return 1;
  78 }
  79
  80 void mmc_init_stream(void)
  81 {
  82         writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
  83
  84         writel(MMC_CMD0, &mmc_base->cmd);
  85         while (!(readl(&mmc_base->stat) & CC_MASK));
  86
  87         writel(CC_MASK, &mmc_base->stat);
  88
  89         writel(MMC_CMD0, &mmc_base->cmd);
  90         while (!(readl(&mmc_base->stat) & CC_MASK));
  91
  92         writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
  93 }
  94
  95 unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div)
  96 {
  97         unsigned int val;
  98
  99         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 100                         (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 101
 102         switch (iclk) {
 103         case CLK_INITSEQ:
 104                 val = MMC_INIT_SEQ_CLK / 2;
 105                 break;
 106         case CLK_400KHZ:
 107                 val = MMC_400kHz_CLK;
 108                 break;
 109         case CLK_MISC:
 110                 val = clk_div;
 111                 break;
 112         default:
 113                 return 0;
 114         }
 115         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 116                         (val << CLKD_OFFSET) | ICE_OSCILLATE);
 117
 118         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY);
 119
 120         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 121         return 1;
 122 }
 123
 124 unsigned char mmc_init_setup(void)
 125 {
 126         unsigned int reg_val;
 127
 128         mmc_board_init();
 129
 130         writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
 131                 &mmc_base->sysconfig);
 132         while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0);
 133
 134         writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
 135         while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0);
 136
 137         writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
 138         writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
 139                 &mmc_base->capa);
 140
 141         reg_val = readl(&mmc_base->con) & RESERVED_MASK;
 142
 143         writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
 144                 MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
 145                 HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
 146
 147         mmc_clock_config(CLK_INITSEQ, 0);
 148         writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
 149
 150         writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
 151                 IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
 152                 &mmc_base->ie);
 153
 154         mmc_init_stream();
 155         return 1;
 156 }
 157
 158 unsigned char mmc_send_cmd(unsigned int cmd, unsigned int arg,
 159                                 unsigned int *response)
 160 {
 161         unsigned int mmc_stat;
 162
 163         while ((readl(&mmc_base->pstate) & DATI_MASK) == DATI_CMDDIS);
 164
 165         writel(BLEN_512BYTESLEN | NBLK_STPCNT, &mmc_base->blk);
 166         writel(0xFFFFFFFF, &mmc_base->stat);
 167         writel(arg, &mmc_base->arg);
 168         writel(cmd | CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
 169                 MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE,
 170                 &mmc_base->cmd);
 171
 172         while (1) {
 173                 do {
 174                         mmc_stat = readl(&mmc_base->stat);
 175                 } while (mmc_stat == 0);
 176
 177                 if ((mmc_stat & ERRI_MASK) != 0)
 178                         return (unsigned char) mmc_stat;
 179
 180                 if (mmc_stat & CC_MASK) {
 181                         writel(CC_MASK, &mmc_base->stat);
 182                         response[0] = readl(&mmc_base->rsp10);
 183                         if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) {
 184                                 response[1] = readl(&mmc_base->rsp32);
 185                                 response[2] = readl(&mmc_base->rsp54);
 186                                 response[3] = readl(&mmc_base->rsp76);
 187                         }
 188                         break;
 189                 }
 190         }
 191         return 1;
 192 }
 193
 194 unsigned char mmc_read_data(unsigned int *output_buf)
 195 {
 196         unsigned int mmc_stat;
 197         unsigned int read_count = 0;
 198
 199         /*
 200          * Start Polled Read
 201          */
 202         while (1) {
 203                 do {
 204                         mmc_stat = readl(&mmc_base->stat);
 205                 } while (mmc_stat == 0);
 206
 207                 if ((mmc_stat & ERRI_MASK) != 0)
 208                         return (unsigned char) mmc_stat;
 209
 210                 if (mmc_stat & BRR_MASK) {
 211                         unsigned int k;
 212
 213                         writel(readl(&mmc_base->stat) | BRR_MASK,
 214                                 &mmc_base->stat);
 215                         for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) {
 216                                 *output_buf = readl(&mmc_base->data);
 217                                 output_buf++;
 218                                 read_count += 4;
 219                         }
 220                 }
 221
 222                 if (mmc_stat & BWR_MASK)
 223                         writel(readl(&mmc_base->stat) | BWR_MASK,
 224                                 &mmc_base->stat);
 225
 226                 if (mmc_stat & TC_MASK) {
 227                         writel(readl(&mmc_base->stat) | TC_MASK,
 228                                 &mmc_base->stat);
 229                         break;
 230                 }
 231         }
 232         return 1;
 233 }
 234
 235 unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur)
 236 {
 237         unsigned char err;
 238         unsigned int argument = 0;
 239         unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val;
 240         unsigned short retry_cnt = 2000;
 241         mmc_resp_t mmc_resp;
 242
 243         /* Set to Initialization Clock */
 244         err = mmc_clock_config(CLK_400KHZ, 0);
 245         if (err != 1)
 246                 return err;
 247
 248         mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS;
 249         argument = 0x00000000;
 250
 251         ocr_value = (0x1FF << 15);
 252         err = mmc_send_cmd(MMC_CMD0, argument, mmc_resp.resp);
 253         if (err != 1)
 254                 return err;
 255
 256         argument = SD_CMD8_CHECK_PATTERN | SD_CMD8_2_7_3_6_V_RANGE;
 257         err = mmc_send_cmd(MMC_SDCMD8, argument, mmc_resp.resp);
 258         hcs_val = (err == 1) ?
 259                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR :
 260                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE;
 261
 262         argument = 0x0000 << 16;
 263         err = mmc_send_cmd(MMC_CMD55, argument, mmc_resp.resp);
 264         if (err == 1) {
 265                 mmc_card_cur->card_type = SD_CARD;
 266                 ocr_value |= hcs_val;
 267                 ret_cmd41 = MMC_ACMD41;
 268         } else {
 269                 mmc_card_cur->card_type = MMC_CARD;
 270                 ocr_value |= MMC_OCR_REG_ACCESS_MODE_SECTOR;
 271                 ret_cmd41 = MMC_CMD1;
 272                 writel(readl(&mmc_base->con) & ~OD, &mmc_base->con);
 273                 writel(readl(&mmc_base->con) | OPENDRAIN, &mmc_base->con);
 274         }
 275
 276         argument = ocr_value;
 277         err = mmc_send_cmd(ret_cmd41, argument, mmc_resp.resp);
 278         if (err != 1)
 279                 return err;
 280
 281         ocr_recvd = mmc_resp.r3.ocr;
 282
 283         while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) {
 284                 retry_cnt--;
 285                 if (mmc_card_cur->card_type == SD_CARD) {
 286                         argument = 0x0000 << 16;
 287                         err = mmc_send_cmd(MMC_CMD55, argument, mmc_resp.resp);
 288                 }
 289
 290                 argument = ocr_value;
 291                 err = mmc_send_cmd(ret_cmd41, argument, mmc_resp.resp);
 292                 if (err != 1)
 293                         return err;
 294                 ocr_recvd = mmc_resp.r3.ocr;
 295         }
 296
 297         if (!(ocr_recvd & (0x1 << 31)))
 298                 return 0;
 299
 300         if (mmc_card_cur->card_type == MMC_CARD) {
 301                 if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) ==
 302                         MMC_OCR_REG_ACCESS_MODE_SECTOR) {
 303                         mmc_card_cur->mode = SECTOR_MODE;
 304                 } else {
 305                         mmc_card_cur->mode = BYTE_MODE;
 306                 }
 307
 308                 ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK;
 309         } else {
 310                 if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK)
 311                         == MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) {
 312                         mmc_card_cur->mode = SECTOR_MODE;
 313                 } else {
 314                         mmc_card_cur->mode = BYTE_MODE;
 315                 }
 316                 ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK;
 317         }
 318
 319         ocr_recvd &= ~(0x1 << 31);
 320         if (!(ocr_recvd & ocr_value))
 321                 return 0;
 322
 323         err = mmc_send_cmd(MMC_CMD2, argument, mmc_resp.resp);
 324         if (err != 1)
 325                 return err;
 326
 327         if (mmc_card_cur->card_type == MMC_CARD) {
 328                 argument = mmc_card_cur->RCA << 16;
 329                 err = mmc_send_cmd(MMC_CMD3, argument, mmc_resp.resp);
 330                 if (err != 1)
 331                         return err;
 332         } else {
 333                 argument = 0x00000000;
 334                 err = mmc_send_cmd(MMC_SDCMD3, argument, mmc_resp.resp);
 335                 if (err != 1)
 336                         return err;
 337
 338                 mmc_card_cur->RCA = mmc_resp.r6.newpublishedrca;
 339         }
 340
 341         writel(readl(&mmc_base->con) & ~OD, &mmc_base->con);
 342         writel(readl(&mmc_base->con) | NOOPENDRAIN, &mmc_base->con);
 343         return 1;
 344 }
 345
 346 unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data,
 347                                 mmc_csd_reg_t *cur_csd)
 348 {
 349         mmc_extended_csd_reg_t ext_csd;
 350         unsigned int size, count, blk_len, blk_no, card_size, argument;
 351         unsigned char err;
 352         unsigned int resp[4];
 353
 354         if (mmc_dev_data->mode == SECTOR_MODE) {
 355                 if (mmc_dev_data->card_type == SD_CARD) {
 356                         card_size =
 357                                 (((mmc_sd2_csd_reg_t *) cur_csd)->
 358                                 c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) |
 359                                 ((((mmc_sd2_csd_reg_t *) cur_csd)->
 360                                 c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK)
 361                                 << MMC_SD2_CSD_C_SIZE_MSB_OFFSET);
 362                         mmc_dev_data->size = card_size * 1024;
 363                         if (mmc_dev_data->size == 0)
 364                                 return 0;
 365                 } else {
 366                         argument = 0x00000000;
 367                         err = mmc_send_cmd(MMC_CMD8, argument, resp);
 368                         if (err != 1)
 369                                 return err;
 370                         err = mmc_read_data((unsigned int *) &ext_csd);
 371                         if (err != 1)
 372                                 return err;
 373                         mmc_dev_data->size = ext_csd.sectorcount;
 374
 375                         if (mmc_dev_data->size == 0)
 376                                 mmc_dev_data->size = 8388608;
 377                 }
 378         } else {
 379                 if (cur_csd->c_size_mult >= 8)
 380                         return 0;
 381
 382                 if (cur_csd->read_bl_len >= 12)
 383                         return 0;
 384
 385                 /* Compute size */
 386                 count = 1 << (cur_csd->c_size_mult + 2);
 387                 card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) |
 388                         ((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK)
 389                         << MMC_CSD_C_SIZE_MSB_OFFSET);
 390                 blk_no = (card_size + 1) * count;
 391                 blk_len = 1 << cur_csd->read_bl_len;
 392                 size = blk_no * blk_len;
 393                 mmc_dev_data->size = size / MMCSD_SECTOR_SIZE;
 394                 if (mmc_dev_data->size == 0)
 395                         return 0;
 396         }
 397         return 1;
 398 }
 399
 400 unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes,
 401                                  mmc_card_data *mmc_c,
 402                                  unsigned long *output_buf)
 403 {
 404         unsigned char err;
 405         unsigned int argument;
 406         unsigned int resp[4];
 407         unsigned int num_sec_val =
 408                 (num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE;
 409         unsigned int sec_inc_val;
 410
 411         if (num_sec_val == 0)
 412                 return 1;
 413
 414         if (mmc_c->mode == SECTOR_MODE) {
 415                 argument = start_sec;
 416                 sec_inc_val = 1;
 417         } else {
 418                 argument = start_sec * MMCSD_SECTOR_SIZE;
 419                 sec_inc_val = MMCSD_SECTOR_SIZE;
 420         }
 421
 422         while (num_sec_val) {
 423                 err = mmc_send_cmd(MMC_CMD17, argument, resp);
 424                 if (err != 1)
 425                         return err;
 426
 427                 err = mmc_read_data((unsigned int *) output_buf);
 428                 if (err != 1)
 429                         return err;
 430
 431                 output_buf += (MMCSD_SECTOR_SIZE / 4);
 432                 argument += sec_inc_val;
 433                 num_sec_val--;
 434         }
 435         return 1;
 436 }
 437
 438 unsigned char configure_mmc(mmc_card_data *mmc_card_cur)
 439 {
 440         unsigned char ret_val;
 441         unsigned int argument;
 442         unsigned int trans_clk, trans_fact, trans_unit, retries = 2;
 443         unsigned char trans_speed;
 444         mmc_resp_t mmc_resp;
 445
 446         ret_val = mmc_init_setup();
 447
 448         if (ret_val != 1)
 449                 return ret_val;
 450
 451         do {
 452                 ret_val = mmc_detect_card(mmc_card_cur);
 453                 retries--;
 454         } while ((retries > 0) && (ret_val != 1));
 455
 456         argument = mmc_card_cur->RCA << 16;
 457         ret_val = mmc_send_cmd(MMC_CMD9, argument, mmc_resp.resp);
 458         if (ret_val != 1)
 459                 return ret_val;
 460
 461         if (mmc_card_cur->card_type == MMC_CARD)
 462                 mmc_card_cur->version = mmc_resp.Card_CSD.spec_vers;
 463
 464         trans_speed = mmc_resp.Card_CSD.tran_speed;
 465
 466         ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, mmc_resp.resp);
 467         if (ret_val != 1)
 468                 return ret_val;
 469
 470         trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK;
 471         trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK;
 472
 473         if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ)
 474                 return 0;
 475
 476         if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) ||
 477                 (trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0))
 478                 return 0;
 479
 480         trans_unit >>= 0;
 481         trans_fact >>= 3;
 482
 483         trans_clk = mmc_transspeed_val[trans_fact - 1][trans_unit] * 2;
 484         ret_val = mmc_clock_config(CLK_MISC, trans_clk);
 485
 486         if (ret_val != 1)
 487                 return ret_val;
 488
 489         argument = mmc_card_cur->RCA << 16;
 490         ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, mmc_resp.resp);
 491         if (ret_val != 1)
 492                 return ret_val;
 493
 494         /* Configure the block length to 512 bytes */
 495         argument = MMCSD_SECTOR_SIZE;
 496         ret_val = mmc_send_cmd(MMC_CMD16, argument, mmc_resp.resp);
 497         if (ret_val != 1)
 498                 return ret_val;
 499
 500         /* get the card size in sectors */
 501         ret_val = mmc_read_cardsize(mmc_card_cur, &mmc_resp.Card_CSD);
 502         if (ret_val != 1)
 503                 return ret_val;
 504
 505         return 1;
 506 }
 507 unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt,
 508                         void *dst)
 509 {
 510         omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE), &cur_card_data,
 511                                 (unsigned long *) dst);
 512         return 1;
 513 }
 514
 515 int mmc_legacy_init(int verbose)
 516 {
 517         if (configure_mmc(&cur_card_data) != 1)
 518                 return 1;
 519
 520         mmc_blk_dev.if_type = IF_TYPE_MMC;
 521         mmc_blk_dev.part_type = PART_TYPE_DOS;
 522         mmc_blk_dev.dev = 0;
 523         mmc_blk_dev.lun = 0;
 524         mmc_blk_dev.type = 0;
 525
 526         /* FIXME fill in the correct size (is set to 32MByte) */
 527         mmc_blk_dev.blksz = MMCSD_SECTOR_SIZE;
 528         mmc_blk_dev.lba = 0x10000;
 529         mmc_blk_dev.removable = 0;
 530         mmc_blk_dev.block_read = mmc_bread;
 531
 532         fat_register_device(&mmc_blk_dev, 1);
 533         return 0;
 534 }