cpu/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 <part.h>
  28 #include <fat.h>
  29 #include <mmc.h>
  30 #include <i2c.h>
  31
  32 const unsigned short mmc_transspeed_val[15][4] = {
  33         {CLKD(10, 1), CLKD(10, 10), CLKD(10, 100), CLKD(10, 1000)},
  34         {CLKD(12, 1), CLKD(12, 10), CLKD(12, 100), CLKD(12, 1000)},
  35         {CLKD(13, 1), CLKD(13, 10), CLKD(13, 100), CLKD(13, 1000)},
  36         {CLKD(15, 1), CLKD(15, 10), CLKD(15, 100), CLKD(15, 1000)},
  37         {CLKD(20, 1), CLKD(20, 10), CLKD(20, 100), CLKD(20, 1000)},
  38         {CLKD(26, 1), CLKD(26, 10), CLKD(26, 100), CLKD(26, 1000)},
  39         {CLKD(30, 1), CLKD(30, 10), CLKD(30, 100), CLKD(30, 1000)},
  40         {CLKD(35, 1), CLKD(35, 10), CLKD(35, 100), CLKD(35, 1000)},
  41         {CLKD(40, 1), CLKD(40, 10), CLKD(40, 100), CLKD(40, 1000)},
  42         {CLKD(45, 1), CLKD(45, 10), CLKD(45, 100), CLKD(45, 1000)},
  43         {CLKD(52, 1), CLKD(52, 10), CLKD(52, 100), CLKD(52, 1000)},
  44         {CLKD(55, 1), CLKD(55, 10), CLKD(55, 100), CLKD(55, 1000)},
  45         {CLKD(60, 1), CLKD(60, 10), CLKD(60, 100), CLKD(60, 1000)},
  46         {CLKD(70, 1), CLKD(70, 10), CLKD(70, 100), CLKD(70, 1000)},
  47         {CLKD(80, 1), CLKD(80, 10), CLKD(80, 100), CLKD(80, 1000)}
  48 };
  49
  50 mmc_card_data cur_card_data;
  51 static block_dev_desc_t mmc_blk_dev;
  52
  53 block_dev_desc_t *mmc_get_dev(int dev)
  54 {
  55         return ((block_dev_desc_t *) &mmc_blk_dev);
  56 }
  57
  58 void twl4030_mmc_config(void)
  59 {
  60         unsigned char data;
  61
  62         data = 0x20;
  63         i2c_write(0x4B, 0x82, 1, &data, 1);
  64         data = 0x2;
  65         i2c_write(0x4B, 0x85, 1, &data, 1);
  66 }
  67
  68 unsigned char mmc_board_init(void)
  69 {
  70         unsigned int value = 0;
  71
  72         twl4030_mmc_config();
  73
  74         value = CONTROL_PBIAS_LITE;
  75         CONTROL_PBIAS_LITE = value | (1 << 2) | (1 << 1) | (1 << 9);
  76
  77         value = CONTROL_DEV_CONF0;
  78         CONTROL_DEV_CONF0 = value | (1 << 24);
  79
  80         return 1;
  81 }
  82
  83 void mmc_init_stream(void)
  84 {
  85         volatile unsigned int mmc_stat;
  86
  87         OMAP_HSMMC_CON |= INIT_INITSTREAM;
  88
  89         OMAP_HSMMC_CMD = MMC_CMD0;
  90         do {
  91                 mmc_stat = OMAP_HSMMC_STAT;
  92         } while (!(mmc_stat & CC_MASK));
  93
  94         OMAP_HSMMC_STAT = CC_MASK;
  95
  96         OMAP_HSMMC_CMD = MMC_CMD0;
  97         do {
  98                 mmc_stat = OMAP_HSMMC_STAT;
  99         } while (!(mmc_stat & CC_MASK));
 100
 101         OMAP_HSMMC_STAT = OMAP_HSMMC_STAT;
 102         OMAP_HSMMC_CON &= ~INIT_INITSTREAM;
 103 }
 104
 105 unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div)
 106 {
 107         unsigned int val;
 108
 109         mmc_reg_out(OMAP_HSMMC_SYSCTL, (ICE_MASK | DTO_MASK | CEN_MASK),
 110                     (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 111
 112         switch (iclk) {
 113         case CLK_INITSEQ:
 114                 val = MMC_INIT_SEQ_CLK / 2;
 115                 break;
 116         case CLK_400KHZ:
 117                 val = MMC_400kHz_CLK;
 118                 break;
 119         case CLK_MISC:
 120                 val = clk_div;
 121                 break;
 122         default:
 123                 return 0;
 124         }
 125         mmc_reg_out(OMAP_HSMMC_SYSCTL,
 126                     ICE_MASK | CLKD_MASK, (val << CLKD_OFFSET) | ICE_OSCILLATE);
 127
 128         while ((OMAP_HSMMC_SYSCTL & ICS_MASK) == ICS_NOTREADY) {
 129         }
 130
 131         OMAP_HSMMC_SYSCTL |= CEN_ENABLE;
 132         return 1;
 133 }
 134
 135 unsigned char mmc_init_setup(void)
 136 {
 137         unsigned int reg_val;
 138
 139         mmc_board_init();
 140
 141         OMAP_HSMMC_SYSCONFIG |= MMC_SOFTRESET;
 142         while ((OMAP_HSMMC_SYSSTATUS & RESETDONE) == 0) ;
 143
 144         OMAP_HSMMC_SYSCTL |= SOFTRESETALL;
 145         while ((OMAP_HSMMC_SYSCTL & SOFTRESETALL) != 0x0) ;
 146
 147         OMAP_HSMMC_HCTL = DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0;
 148         OMAP_HSMMC_CAPA |= VS30_3V0SUP | VS18_1V8SUP;
 149
 150         reg_val = OMAP_HSMMC_CON & RESERVED_MASK;
 151
 152         OMAP_HSMMC_CON = CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH |
 153             CDP_ACTIVEHIGH | MIT_CTO | DW8_1_4BITMODE | MODE_FUNC |
 154             STR_BLOCK | HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN;
 155
 156         mmc_clock_config(CLK_INITSEQ, 0);
 157         OMAP_HSMMC_HCTL |= SDBP_PWRON;
 158
 159         OMAP_HSMMC_IE = 0x307f0033;
 160
 161         mmc_init_stream();
 162         return 1;
 163 }
 164
 165 unsigned char mmc_send_cmd(unsigned int cmd, unsigned int arg,
 166                            unsigned int *response)
 167 {
 168         volatile unsigned int mmc_stat;
 169
 170         while ((OMAP_HSMMC_PSTATE & DATI_MASK) == DATI_CMDDIS) {
 171         }
 172
 173         OMAP_HSMMC_BLK = BLEN_512BYTESLEN | NBLK_STPCNT;
 174         OMAP_HSMMC_STAT = 0xFFFFFFFF;
 175         OMAP_HSMMC_ARG = arg;
 176         OMAP_HSMMC_CMD = cmd | CMD_TYPE_NORMAL | CICE_NOCHECK |
 177             CCCE_NOCHECK | MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE |
 178             DE_DISABLE;
 179
 180         while (1) {
 181                 do {
 182                         mmc_stat = OMAP_HSMMC_STAT;
 183                 } while (mmc_stat == 0);
 184
 185                 if ((mmc_stat & ERRI_MASK) != 0)
 186                         return (unsigned char) mmc_stat;
 187
 188                 if (mmc_stat & CC_MASK) {
 189                         OMAP_HSMMC_STAT = CC_MASK;
 190                         response[0] = OMAP_HSMMC_RSP10;
 191                         if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) {
 192                                 response[1] = OMAP_HSMMC_RSP32;
 193                                 response[2] = OMAP_HSMMC_RSP54;
 194                                 response[3] = OMAP_HSMMC_RSP76;
 195                         }
 196                         break;
 197                 }
 198         }
 199         return 1;
 200 }
 201
 202 unsigned char mmc_read_data(unsigned int *output_buf)
 203 {
 204         volatile unsigned int mmc_stat;
 205         unsigned int read_count = 0;
 206
 207         /*
 208          * Start Polled Read
 209          */
 210         while (1) {
 211                 do {
 212                         mmc_stat = OMAP_HSMMC_STAT;
 213                 } while (mmc_stat == 0);
 214
 215                 if ((mmc_stat & ERRI_MASK) != 0)
 216                         return (unsigned char) mmc_stat;
 217
 218                 if (mmc_stat & BRR_MASK) {
 219                         unsigned int k;
 220
 221                         OMAP_HSMMC_STAT |= BRR_MASK;
 222                         for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) {
 223                                 *output_buf = OMAP_HSMMC_DATA;
 224                                 output_buf++;
 225                                 read_count += 4;
 226                         }
 227                 }
 228
 229                 if (mmc_stat & BWR_MASK)
 230                         OMAP_HSMMC_STAT |= BWR_MASK;
 231
 232                 if (mmc_stat & TC_MASK) {
 233                         OMAP_HSMMC_STAT |= TC_MASK;
 234                         break;
 235                 }
 236         }
 237         return 1;
 238 }
 239
 240 unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur)
 241 {
 242         unsigned char err;
 243         unsigned int argument = 0;
 244         unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val;
 245         unsigned int resp[4];
 246         unsigned short retry_cnt = 2000;
 247
 248         /* Set to Initialization Clock */
 249         err = mmc_clock_config(CLK_400KHZ, 0);
 250         if (err != 1)
 251                 return err;
 252
 253         mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS;
 254         argument = 0x00000000;
 255
 256         ocr_value = (0x1FF << 15);
 257         err = mmc_send_cmd(MMC_CMD0, argument, resp);
 258         if (err != 1)
 259                 return err;
 260
 261         argument = SD_CMD8_CHECK_PATTERN | SD_CMD8_2_7_3_6_V_RANGE;
 262         err = mmc_send_cmd(MMC_SDCMD8, argument, resp);
 263         hcs_val = (err == 1) ?
 264             MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR :
 265             MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE;
 266
 267         argument = 0x0000 << 16;
 268         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 269         if (err == 1) {
 270                 mmc_card_cur->card_type = SD_CARD;
 271                 ocr_value |= hcs_val;
 272                 ret_cmd41 = MMC_ACMD41;
 273         } else {
 274                 mmc_card_cur->card_type = MMC_CARD;
 275                 ocr_value |= MMC_OCR_REG_ACCESS_MODE_SECTOR;
 276                 ret_cmd41 = MMC_CMD1;
 277                 OMAP_HSMMC_CON &= ~OD;
 278                 OMAP_HSMMC_CON |= OPENDRAIN;
 279         }
 280
 281         argument = ocr_value;
 282         err = mmc_send_cmd(ret_cmd41, argument, resp);
 283         if (err != 1)
 284                 return err;
 285
 286         ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 287
 288         while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) {
 289                 retry_cnt--;
 290                 if (mmc_card_cur->card_type == SD_CARD) {
 291                         argument = 0x0000 << 16;
 292                         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 293                 }
 294
 295                 argument = ocr_value;
 296                 err = mmc_send_cmd(ret_cmd41, argument, resp);
 297                 if (err != 1)
 298                         return err;
 299                 ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 300         }
 301
 302         if (!(ocr_recvd & (0x1 << 31)))
 303                 return 0;
 304
 305         if (mmc_card_cur->card_type == MMC_CARD) {
 306                 if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) ==
 307                     MMC_OCR_REG_ACCESS_MODE_SECTOR) {
 308                         mmc_card_cur->mode = SECTOR_MODE;
 309                 } else {
 310                         mmc_card_cur->mode = BYTE_MODE;
 311                 }
 312
 313                 ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK;
 314         } else {
 315                 if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK)
 316                     == MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) {
 317                         mmc_card_cur->mode = SECTOR_MODE;
 318                 } else {
 319                         mmc_card_cur->mode = BYTE_MODE;
 320                 }
 321                 ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK;
 322         }
 323
 324         ocr_recvd &= ~(0x1 << 31);
 325         if (!(ocr_recvd & ocr_value))
 326                 return 0;
 327
 328         err = mmc_send_cmd(MMC_CMD2, argument, resp);
 329         if (err != 1)
 330                 return err;
 331
 332         if (mmc_card_cur->card_type == MMC_CARD) {
 333                 argument = mmc_card_cur->RCA << 16;
 334                 err = mmc_send_cmd(MMC_CMD3, argument, resp);
 335                 if (err != 1)
 336                         return err;
 337         } else {
 338                 argument = 0x00000000;
 339                 err = mmc_send_cmd(MMC_SDCMD3, argument, resp);
 340                 if (err != 1)
 341                         return err;
 342
 343                 mmc_card_cur->RCA = ((mmc_resp_r6 *) resp)->newpublishedrca;
 344         }
 345
 346         OMAP_HSMMC_CON &= ~OD;
 347         OMAP_HSMMC_CON |= NOOPENDRAIN;
 348         return 1;
 349 }
 350
 351 unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data,
 352                                 mmc_csd_reg_t *cur_csd)
 353 {
 354         mmc_extended_csd_reg_t ext_csd;
 355         unsigned int size, count, blk_len, blk_no, card_size, argument;
 356         unsigned char err;
 357         unsigned int resp[4];
 358
 359         if (mmc_dev_data->mode == SECTOR_MODE) {
 360                 if (mmc_dev_data->card_type == SD_CARD) {
 361                         card_size =
 362                             (((mmc_sd2_csd_reg_t *) cur_csd)->
 363                              c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) |
 364                             ((((mmc_sd2_csd_reg_t *) cur_csd)->
 365                               c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK)
 366                              << MMC_SD2_CSD_C_SIZE_MSB_OFFSET);
 367                         mmc_dev_data->size = card_size * 1024;
 368                         if (mmc_dev_data->size == 0)
 369                                 return 0;
 370                 } else {
 371                         argument = 0x00000000;
 372                         err = mmc_send_cmd(MMC_CMD8, argument, resp);
 373                         if (err != 1)
 374                                 return err;
 375                         err = mmc_read_data((unsigned int *) &ext_csd);
 376                         if (err != 1)
 377                                 return err;
 378                         mmc_dev_data->size = ext_csd.sectorcount;
 379
 380                         if (mmc_dev_data->size == 0)
 381                                 mmc_dev_data->size = 8388608;
 382                 }
 383         } else {
 384                 if (cur_csd->c_size_mult >= 8)
 385                         return 0;
 386
 387                 if (cur_csd->read_bl_len >= 12)
 388                         return 0;
 389
 390                 /* Compute size */
 391                 count = 1 << (cur_csd->c_size_mult + 2);
 392                 card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) |
 393                     ((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK)
 394                      << MMC_CSD_C_SIZE_MSB_OFFSET);
 395                 blk_no = (card_size + 1) * count;
 396                 blk_len = 1 << cur_csd->read_bl_len;
 397                 size = blk_no * blk_len;
 398                 mmc_dev_data->size = size / MMCSD_SECTOR_SIZE;
 399                 if (mmc_dev_data->size == 0)
 400                         return 0;
 401         }
 402         return 1;
 403 }
 404
 405 unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes,
 406                                  mmc_card_data *mmc_c,
 407                                  unsigned long *output_buf)
 408 {
 409         unsigned char err;
 410         unsigned int argument;
 411         unsigned int resp[4];
 412         unsigned int num_sec_val =
 413             (num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE;
 414         unsigned int sec_inc_val;
 415
 416         if (num_sec_val == 0)
 417                 return 1;
 418
 419         if (mmc_c->mode == SECTOR_MODE) {
 420                 argument = start_sec;
 421                 sec_inc_val = 1;
 422         } else {
 423                 argument = start_sec * MMCSD_SECTOR_SIZE;
 424                 sec_inc_val = MMCSD_SECTOR_SIZE;
 425         }
 426
 427         while (num_sec_val) {
 428                 err = mmc_send_cmd(MMC_CMD17, argument, resp);
 429                 if (err != 1)
 430                         return err;
 431
 432                 err = mmc_read_data((unsigned int *) output_buf);
 433                 if (err != 1)
 434                         return err;
 435
 436                 output_buf += (MMCSD_SECTOR_SIZE / 4);
 437                 argument += sec_inc_val;
 438                 num_sec_val--;
 439         }
 440         return 1;
 441 }
 442
 443 unsigned char configure_mmc(mmc_card_data *mmc_card_cur)
 444 {
 445         unsigned char ret_val;
 446         unsigned int argument;
 447         unsigned int resp[4];
 448         unsigned int trans_clk, trans_fact, trans_unit, retries = 2;
 449         mmc_csd_reg_t Card_CSD;
 450         unsigned char trans_speed;
 451
 452         ret_val = mmc_init_setup();
 453
 454         if (ret_val != 1)
 455                 return ret_val;
 456
 457         do {
 458                 ret_val = mmc_detect_card(mmc_card_cur);
 459                 retries--;
 460         } while ((retries > 0) && (ret_val != 1));
 461
 462         argument = mmc_card_cur->RCA << 16;
 463         ret_val = mmc_send_cmd(MMC_CMD9, argument, resp);
 464         if (ret_val != 1)
 465                 return ret_val;
 466
 467         ((unsigned int *) &Card_CSD)[3] = resp[3];
 468         ((unsigned int *) &Card_CSD)[2] = resp[2];
 469         ((unsigned int *) &Card_CSD)[1] = resp[1];
 470         ((unsigned int *) &Card_CSD)[0] = resp[0];
 471
 472         if (mmc_card_cur->card_type == MMC_CARD)
 473                 mmc_card_cur->version = Card_CSD.spec_vers;
 474
 475         trans_speed = Card_CSD.tran_speed;
 476
 477         ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, resp);
 478         if (ret_val != 1)
 479                 return ret_val;
 480
 481         trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK;
 482         trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK;
 483
 484         if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ)
 485                 return 0;
 486
 487         if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) ||
 488             (trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0))
 489                 return 0;
 490
 491         trans_unit >>= 0;
 492         trans_fact >>= 3;
 493
 494         trans_clk = mmc_transspeed_val[trans_fact - 1][trans_unit] * 2;
 495         ret_val = mmc_clock_config(CLK_MISC, trans_clk);
 496
 497         if (ret_val != 1)
 498                 return ret_val;
 499
 500         argument = mmc_card_cur->RCA << 16;
 501         ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, resp);
 502         if (ret_val != 1)
 503                 return ret_val;
 504
 505         /* Configure the block length to 512 bytes */
 506         argument = MMCSD_SECTOR_SIZE;
 507         ret_val = mmc_send_cmd(MMC_CMD16, argument, resp);
 508         if (ret_val != 1)
 509                 return ret_val;
 510
 511         /* get the card size in sectors */
 512         ret_val = mmc_read_cardsize(mmc_card_cur, &Card_CSD);
 513         if (ret_val != 1)
 514                 return ret_val;
 515
 516         return 1;
 517 }
 518 unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt,
 519                         void *dst)
 520 {
 521         omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE), &cur_card_data,
 522                            (unsigned long *) dst);
 523         return 1;
 524 }
 525
 526 int mmc_init(int verbose)
 527 {
 528         unsigned char ret;
 529
 530         ret = configure_mmc(&cur_card_data);
 531
 532         if (ret == 1) {
 533                 mmc_blk_dev.if_type = IF_TYPE_MMC;
 534                 mmc_blk_dev.part_type = PART_TYPE_DOS;
 535                 mmc_blk_dev.dev = 0;
 536                 mmc_blk_dev.lun = 0;
 537                 mmc_blk_dev.type = 0;
 538
 539                 /* FIXME fill in the correct size (is set to 32MByte) */
 540                 mmc_blk_dev.blksz = MMCSD_SECTOR_SIZE;
 541                 mmc_blk_dev.lba = 0x10000;
 542                 mmc_blk_dev.removable = 0;
 543                 mmc_blk_dev.block_read = mmc_bread;
 544
 545                 fat_register_device(&mmc_blk_dev, 1);
 546                 return 1;
 547         }
 548         else
 549                 return 0;
 550 }
 551
 552 int mmc_read(ulong src, uchar *dst, int size)
 553 {
 554         return 0;
 555 }
 556
 557 int mmc_write(uchar *src, ulong dst, int size)
 558 {
 559         return 0;
 560 }
 561
 562 int mmc2info(ulong addr)
 563 {
 564         return 0;
 565 }