git.sur5r.net Git - u-boot/blob - 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 <asm/arch/mmc.h>
  32
  33 const unsigned short mmc_transspeed_val[15][4] = {
  34         {CLKD(10, 1), CLKD(10, 10), CLKD(10, 100), CLKD(10, 1000)},
  35         {CLKD(12, 1), CLKD(12, 10), CLKD(12, 100), CLKD(12, 1000)},
  36         {CLKD(13, 1), CLKD(13, 10), CLKD(13, 100), CLKD(13, 1000)},
  37         {CLKD(15, 1), CLKD(15, 10), CLKD(15, 100), CLKD(15, 1000)},
  38         {CLKD(20, 1), CLKD(20, 10), CLKD(20, 100), CLKD(20, 1000)},
  39         {CLKD(26, 1), CLKD(26, 10), CLKD(26, 100), CLKD(26, 1000)},
  40         {CLKD(30, 1), CLKD(30, 10), CLKD(30, 100), CLKD(30, 1000)},
  41         {CLKD(35, 1), CLKD(35, 10), CLKD(35, 100), CLKD(35, 1000)},
  42         {CLKD(40, 1), CLKD(40, 10), CLKD(40, 100), CLKD(40, 1000)},
  43         {CLKD(45, 1), CLKD(45, 10), CLKD(45, 100), CLKD(45, 1000)},
  44         {CLKD(52, 1), CLKD(52, 10), CLKD(52, 100), CLKD(52, 1000)},
  45         {CLKD(55, 1), CLKD(55, 10), CLKD(55, 100), CLKD(55, 1000)},
  46         {CLKD(60, 1), CLKD(60, 10), CLKD(60, 100), CLKD(60, 1000)},
  47         {CLKD(70, 1), CLKD(70, 10), CLKD(70, 100), CLKD(70, 1000)},
  48         {CLKD(80, 1), CLKD(80, 10), CLKD(80, 100), CLKD(80, 1000)}
  49 };
  50
  51 mmc_card_data cur_card_data;
  52 static block_dev_desc_t mmc_blk_dev;
  53
  54 block_dev_desc_t *mmc_get_dev(int dev)
  55 {
  56         return (block_dev_desc_t *) &mmc_blk_dev;
  57 }
  58
  59 void twl4030_mmc_config(void)
  60 {
  61         unsigned char data;
  62
  63         data = 0x20;
  64         i2c_write(0x4B, 0x82, 1, &data, 1);
  65         data = 0x2;
  66         i2c_write(0x4B, 0x85, 1, &data, 1);
  67 }
  68
  69 unsigned char mmc_board_init(void)
  70 {
  71         unsigned int value = 0;
  72
  73         twl4030_mmc_config();
  74
  75         value = CONTROL_PBIAS_LITE;
  76         CONTROL_PBIAS_LITE = value | (1 << 2) | (1 << 1) | (1 << 9);
  77
  78         value = CONTROL_DEV_CONF0;
  79         CONTROL_DEV_CONF0 = value | (1 << 24);
  80
  81         return 1;
  82 }
  83
  84 void mmc_init_stream(void)
  85 {
  86         volatile unsigned int mmc_stat;
  87
  88         OMAP_HSMMC_CON |= INIT_INITSTREAM;
  89
  90         OMAP_HSMMC_CMD = MMC_CMD0;
  91         do {
  92                 mmc_stat = OMAP_HSMMC_STAT;
  93         } while (!(mmc_stat & CC_MASK));
  94
  95         OMAP_HSMMC_STAT = CC_MASK;
  96
  97         OMAP_HSMMC_CMD = MMC_CMD0;
  98         do {
  99                 mmc_stat = OMAP_HSMMC_STAT;
 100         } while (!(mmc_stat & CC_MASK));
 101
 102         OMAP_HSMMC_STAT = OMAP_HSMMC_STAT;
 103         OMAP_HSMMC_CON &= ~INIT_INITSTREAM;
 104 }
 105
 106 unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div)
 107 {
 108         unsigned int val;
 109
 110         mmc_reg_out(OMAP_HSMMC_SYSCTL, (ICE_MASK | DTO_MASK | CEN_MASK),
 111                     (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 112
 113         switch (iclk) {
 114         case CLK_INITSEQ:
 115                 val = MMC_INIT_SEQ_CLK / 2;
 116                 break;
 117         case CLK_400KHZ:
 118                 val = MMC_400kHz_CLK;
 119                 break;
 120         case CLK_MISC:
 121                 val = clk_div;
 122                 break;
 123         default:
 124                 return 0;
 125         }
 126         mmc_reg_out(OMAP_HSMMC_SYSCTL,
 127                     ICE_MASK | CLKD_MASK, (val << CLKD_OFFSET) | ICE_OSCILLATE);
 128
 129         while ((OMAP_HSMMC_SYSCTL & ICS_MASK) == ICS_NOTREADY) ;
 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         OMAP_HSMMC_BLK = BLEN_512BYTESLEN | NBLK_STPCNT;
 173         OMAP_HSMMC_STAT = 0xFFFFFFFF;
 174         OMAP_HSMMC_ARG = arg;
 175         OMAP_HSMMC_CMD = cmd | CMD_TYPE_NORMAL | CICE_NOCHECK |
 176             CCCE_NOCHECK | MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE |
 177             DE_DISABLE;
 178
 179         while (1) {
 180                 do {
 181                         mmc_stat = OMAP_HSMMC_STAT;
 182                 } while (mmc_stat == 0);
 183
 184                 if ((mmc_stat & ERRI_MASK) != 0)
 185                         return (unsigned char) mmc_stat;
 186
 187                 if (mmc_stat & CC_MASK) {
 188                         OMAP_HSMMC_STAT = CC_MASK;
 189                         response[0] = OMAP_HSMMC_RSP10;
 190                         if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) {
 191                                 response[1] = OMAP_HSMMC_RSP32;
 192                                 response[2] = OMAP_HSMMC_RSP54;
 193                                 response[3] = OMAP_HSMMC_RSP76;
 194                         }
 195                         break;
 196                 }
 197         }
 198         return 1;
 199 }
 200
 201 unsigned char mmc_read_data(unsigned int *output_buf)
 202 {
 203         volatile unsigned int mmc_stat;
 204         unsigned int read_count = 0;
 205
 206         /*
 207          * Start Polled Read
 208          */
 209         while (1) {
 210                 do {
 211                         mmc_stat = OMAP_HSMMC_STAT;
 212                 } while (mmc_stat == 0);
 213
 214                 if ((mmc_stat & ERRI_MASK) != 0)
 215                         return (unsigned char) mmc_stat;
 216
 217                 if (mmc_stat & BRR_MASK) {
 218                         unsigned int k;
 219
 220                         OMAP_HSMMC_STAT |= BRR_MASK;
 221                         for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) {
 222                                 *output_buf = OMAP_HSMMC_DATA;
 223                                 output_buf++;
 224                                 read_count += 4;
 225                         }
 226                 }
 227
 228                 if (mmc_stat & BWR_MASK)
 229                         OMAP_HSMMC_STAT |= BWR_MASK;
 230
 231                 if (mmc_stat & TC_MASK) {
 232                         OMAP_HSMMC_STAT |= TC_MASK;
 233                         break;
 234                 }
 235         }
 236         return 1;
 237 }
 238
 239 unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur)
 240 {
 241         unsigned char err;
 242         unsigned int argument = 0;
 243         unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val;
 244         unsigned int resp[4];
 245         unsigned short retry_cnt = 2000;
 246
 247         /* Set to Initialization Clock */
 248         err = mmc_clock_config(CLK_400KHZ, 0);
 249         if (err != 1)
 250                 return err;
 251
 252         mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS;
 253         argument = 0x00000000;
 254
 255         ocr_value = (0x1FF << 15);
 256         err = mmc_send_cmd(MMC_CMD0, argument, resp);
 257         if (err != 1)
 258                 return err;
 259
 260         argument = SD_CMD8_CHECK_PATTERN | SD_CMD8_2_7_3_6_V_RANGE;
 261         err = mmc_send_cmd(MMC_SDCMD8, argument, resp);
 262         hcs_val = (err == 1) ?
 263                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR :
 264                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE;
 265
 266         argument = 0x0000 << 16;
 267         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 268         if (err == 1) {
 269                 mmc_card_cur->card_type = SD_CARD;
 270                 ocr_value |= hcs_val;
 271                 ret_cmd41 = MMC_ACMD41;
 272         } else {
 273                 mmc_card_cur->card_type = MMC_CARD;
 274                 ocr_value |= MMC_OCR_REG_ACCESS_MODE_SECTOR;
 275                 ret_cmd41 = MMC_CMD1;
 276                 OMAP_HSMMC_CON &= ~OD;
 277                 OMAP_HSMMC_CON |= OPENDRAIN;
 278         }
 279
 280         argument = ocr_value;
 281         err = mmc_send_cmd(ret_cmd41, argument, resp);
 282         if (err != 1)
 283                 return err;
 284
 285         ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 286
 287         while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) {
 288                 retry_cnt--;
 289                 if (mmc_card_cur->card_type == SD_CARD) {
 290                         argument = 0x0000 << 16;
 291                         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 292                 }
 293
 294                 argument = ocr_value;
 295                 err = mmc_send_cmd(ret_cmd41, argument, resp);
 296                 if (err != 1)
 297                         return err;
 298                 ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 299         }
 300
 301         if (!(ocr_recvd & (0x1 << 31)))
 302                 return 0;
 303
 304         if (mmc_card_cur->card_type == MMC_CARD) {
 305                 if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) ==
 306                         MMC_OCR_REG_ACCESS_MODE_SECTOR) {
 307                         mmc_card_cur->mode = SECTOR_MODE;
 308                 } else {
 309                         mmc_card_cur->mode = BYTE_MODE;
 310                 }
 311
 312                 ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK;
 313         } else {
 314                 if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK)
 315                         == MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) {
 316                         mmc_card_cur->mode = SECTOR_MODE;
 317                 } else {
 318                         mmc_card_cur->mode = BYTE_MODE;
 319                 }
 320                 ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK;
 321         }
 322
 323         ocr_recvd &= ~(0x1 << 31);
 324         if (!(ocr_recvd & ocr_value))
 325                 return 0;
 326
 327         err = mmc_send_cmd(MMC_CMD2, argument, resp);
 328         if (err != 1)
 329                 return err;
 330
 331         if (mmc_card_cur->card_type == MMC_CARD) {
 332                 argument = mmc_card_cur->RCA << 16;
 333                 err = mmc_send_cmd(MMC_CMD3, argument, resp);
 334                 if (err != 1)
 335                         return err;
 336         } else {
 337                 argument = 0x00000000;
 338                 err = mmc_send_cmd(MMC_SDCMD3, argument, resp);
 339                 if (err != 1)
 340                         return err;
 341
 342                 mmc_card_cur->RCA = ((mmc_resp_r6 *) resp)->newpublishedrca;
 343         }
 344
 345         OMAP_HSMMC_CON &= ~OD;
 346         OMAP_HSMMC_CON |= NOOPENDRAIN;
 347         return 1;
 348 }
 349
 350 unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data,
 351                                 mmc_csd_reg_t *cur_csd)
 352 {
 353         mmc_extended_csd_reg_t ext_csd;
 354         unsigned int size, count, blk_len, blk_no, card_size, argument;
 355         unsigned char err;
 356         unsigned int resp[4];
 357
 358         if (mmc_dev_data->mode == SECTOR_MODE) {
 359                 if (mmc_dev_data->card_type == SD_CARD) {
 360                         card_size =
 361                                 (((mmc_sd2_csd_reg_t *) cur_csd)->
 362                                 c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) |
 363                                 ((((mmc_sd2_csd_reg_t *) cur_csd)->
 364                                 c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK)
 365                                 << MMC_SD2_CSD_C_SIZE_MSB_OFFSET);
 366                         mmc_dev_data->size = card_size * 1024;
 367                         if (mmc_dev_data->size == 0)
 368                                 return 0;
 369                 } else {
 370                         argument = 0x00000000;
 371                         err = mmc_send_cmd(MMC_CMD8, argument, resp);
 372                         if (err != 1)
 373                                 return err;
 374                         err = mmc_read_data((unsigned int *) &ext_csd);
 375                         if (err != 1)
 376                                 return err;
 377                         mmc_dev_data->size = ext_csd.sectorcount;
 378
 379                         if (mmc_dev_data->size == 0)
 380                                 mmc_dev_data->size = 8388608;
 381                 }
 382         } else {
 383                 if (cur_csd->c_size_mult >= 8)
 384                         return 0;
 385
 386                 if (cur_csd->read_bl_len >= 12)
 387                         return 0;
 388
 389                 /* Compute size */
 390                 count = 1 << (cur_csd->c_size_mult + 2);
 391                 card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) |
 392                         ((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK)
 393                         << MMC_CSD_C_SIZE_MSB_OFFSET);
 394                 blk_no = (card_size + 1) * count;
 395                 blk_len = 1 << cur_csd->read_bl_len;
 396                 size = blk_no * blk_len;
 397                 mmc_dev_data->size = size / MMCSD_SECTOR_SIZE;
 398                 if (mmc_dev_data->size == 0)
 399                         return 0;
 400         }
 401         return 1;
 402 }
 403
 404 unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes,
 405                                  mmc_card_data *mmc_c,
 406                                  unsigned long *output_buf)
 407 {
 408         unsigned char err;
 409         unsigned int argument;
 410         unsigned int resp[4];
 411         unsigned int num_sec_val =
 412                 (num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE;
 413         unsigned int sec_inc_val;
 414
 415         if (num_sec_val == 0)
 416                 return 1;
 417
 418         if (mmc_c->mode == SECTOR_MODE) {
 419                 argument = start_sec;
 420                 sec_inc_val = 1;
 421         } else {
 422                 argument = start_sec * MMCSD_SECTOR_SIZE;
 423                 sec_inc_val = MMCSD_SECTOR_SIZE;
 424         }
 425
 426         while (num_sec_val) {
 427                 err = mmc_send_cmd(MMC_CMD17, argument, resp);
 428                 if (err != 1)
 429                         return err;
 430
 431                 err = mmc_read_data((unsigned int *) output_buf);
 432                 if (err != 1)
 433                         return err;
 434
 435                 output_buf += (MMCSD_SECTOR_SIZE / 4);
 436                 argument += sec_inc_val;
 437                 num_sec_val--;
 438         }
 439         return 1;
 440 }
 441
 442 unsigned char configure_mmc(mmc_card_data *mmc_card_cur)
 443 {
 444         unsigned char ret_val;
 445         unsigned int argument;
 446         unsigned int resp[4];
 447         unsigned int trans_clk, trans_fact, trans_unit, retries = 2;
 448         mmc_csd_reg_t Card_CSD;
 449         unsigned char trans_speed;
 450
 451         ret_val = mmc_init_setup();
 452
 453         if (ret_val != 1)
 454                 return ret_val;
 455
 456         do {
 457                 ret_val = mmc_detect_card(mmc_card_cur);
 458                 retries--;
 459         } while ((retries > 0) && (ret_val != 1));
 460
 461         argument = mmc_card_cur->RCA << 16;
 462         ret_val = mmc_send_cmd(MMC_CMD9, argument, resp);
 463         if (ret_val != 1)
 464                 return ret_val;
 465
 466         ((unsigned int *) &Card_CSD)[3] = resp[3];
 467         ((unsigned int *) &Card_CSD)[2] = resp[2];
 468         ((unsigned int *) &Card_CSD)[1] = resp[1];
 469         ((unsigned int *) &Card_CSD)[0] = resp[0];
 470
 471         if (mmc_card_cur->card_type == MMC_CARD)
 472                 mmc_card_cur->version = Card_CSD.spec_vers;
 473
 474         trans_speed = Card_CSD.tran_speed;
 475
 476         ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, resp);
 477         if (ret_val != 1)
 478                 return ret_val;
 479
 480         trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK;
 481         trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK;
 482
 483         if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ)
 484                 return 0;
 485
 486         if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) ||
 487                 (trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0))
 488                 return 0;
 489
 490         trans_unit >>= 0;
 491         trans_fact >>= 3;
 492
 493         trans_clk = mmc_transspeed_val[trans_fact - 1][trans_unit] * 2;
 494         ret_val = mmc_clock_config(CLK_MISC, trans_clk);
 495
 496         if (ret_val != 1)
 497                 return ret_val;
 498
 499         argument = mmc_card_cur->RCA << 16;
 500         ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, resp);
 501         if (ret_val != 1)
 502                 return ret_val;
 503
 504         /* Configure the block length to 512 bytes */
 505         argument = MMCSD_SECTOR_SIZE;
 506         ret_val = mmc_send_cmd(MMC_CMD16, argument, resp);
 507         if (ret_val != 1)
 508                 return ret_val;
 509
 510         /* get the card size in sectors */
 511         ret_val = mmc_read_cardsize(mmc_card_cur, &Card_CSD);
 512         if (ret_val != 1)
 513                 return ret_val;
 514
 515         return 1;
 516 }
 517 unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt,
 518                         void *dst)
 519 {
 520         omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE), &cur_card_data,
 521                            (unsigned long *) dst);
 522         return 1;
 523 }
 524
 525 int mmc_legacy_init(int verbose)
 526 {
 527         if (configure_mmc(&cur_card_data) != 1)
 528                 return 1;
 529
 530         mmc_blk_dev.if_type = IF_TYPE_MMC;
 531         mmc_blk_dev.part_type = PART_TYPE_DOS;
 532         mmc_blk_dev.dev = 0;
 533         mmc_blk_dev.lun = 0;
 534         mmc_blk_dev.type = 0;
 535
 536         /* FIXME fill in the correct size (is set to 32MByte) */
 537         mmc_blk_dev.blksz = MMCSD_SECTOR_SIZE;
 538         mmc_blk_dev.lba = 0x10000;
 539         mmc_blk_dev.removable = 0;
 540         mmc_blk_dev.block_read = mmc_bread;
 541
 542         fat_register_device(&mmc_blk_dev, 1);
 543         return 0;
 544 }
 545