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