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         twl4030_power_mmc_init();
  67
  68         writel(readl(&t2_base->pbias_lite) | PBIASLITEPWRDNZ1 |
  69                 PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
  70                 &t2_base->pbias_lite);
  71
  72         writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
  73                 &t2_base->devconf0);
  74
  75         return 1;
  76 }
  77
  78 void mmc_init_stream(void)
  79 {
  80         writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
  81
  82         writel(MMC_CMD0, &mmc_base->cmd);
  83         while (!(readl(&mmc_base->stat) & CC_MASK));
  84
  85         writel(CC_MASK, &mmc_base->stat);
  86
  87         writel(MMC_CMD0, &mmc_base->cmd);
  88         while (!(readl(&mmc_base->stat) & CC_MASK));
  89
  90         writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
  91 }
  92
  93 unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div)
  94 {
  95         unsigned int val;
  96
  97         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
  98                         (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
  99
 100         switch (iclk) {
 101         case CLK_INITSEQ:
 102                 val = MMC_INIT_SEQ_CLK / 2;
 103                 break;
 104         case CLK_400KHZ:
 105                 val = MMC_400kHz_CLK;
 106                 break;
 107         case CLK_MISC:
 108                 val = clk_div;
 109                 break;
 110         default:
 111                 return 0;
 112         }
 113         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 114                         (val << CLKD_OFFSET) | ICE_OSCILLATE);
 115
 116         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY);
 117
 118         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 119         return 1;
 120 }
 121
 122 unsigned char mmc_init_setup(void)
 123 {
 124         unsigned int reg_val;
 125
 126         mmc_board_init();
 127
 128         writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
 129                 &mmc_base->sysconfig);
 130         while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0);
 131
 132         writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
 133         while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0);
 134
 135         writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
 136         writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
 137                 &mmc_base->capa);
 138
 139         reg_val = readl(&mmc_base->con) & RESERVED_MASK;
 140
 141         writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
 142                 MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
 143                 HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
 144
 145         mmc_clock_config(CLK_INITSEQ, 0);
 146         writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
 147
 148         writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
 149                 IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
 150                 &mmc_base->ie);
 151
 152         mmc_init_stream();
 153         return 1;
 154 }
 155
 156 unsigned char mmc_send_cmd(unsigned int cmd, unsigned int arg,
 157                                 unsigned int *response)
 158 {
 159         unsigned int mmc_stat;
 160
 161         while ((readl(&mmc_base->pstate) & DATI_MASK) == DATI_CMDDIS);
 162
 163         writel(BLEN_512BYTESLEN | NBLK_STPCNT, &mmc_base->blk);
 164         writel(0xFFFFFFFF, &mmc_base->stat);
 165         writel(arg, &mmc_base->arg);
 166         writel(cmd | CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
 167                 MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE,
 168                 &mmc_base->cmd);
 169
 170         while (1) {
 171                 do {
 172                         mmc_stat = readl(&mmc_base->stat);
 173                 } while (mmc_stat == 0);
 174
 175                 if ((mmc_stat & ERRI_MASK) != 0)
 176                         return (unsigned char) mmc_stat;
 177
 178                 if (mmc_stat & CC_MASK) {
 179                         writel(CC_MASK, &mmc_base->stat);
 180                         response[0] = readl(&mmc_base->rsp10);
 181                         if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) {
 182                                 response[1] = readl(&mmc_base->rsp32);
 183                                 response[2] = readl(&mmc_base->rsp54);
 184                                 response[3] = readl(&mmc_base->rsp76);
 185                         }
 186                         break;
 187                 }
 188         }
 189         return 1;
 190 }
 191
 192 unsigned char mmc_read_data(unsigned int *output_buf)
 193 {
 194         unsigned int mmc_stat;
 195         unsigned int read_count = 0;
 196
 197         /*
 198          * Start Polled Read
 199          */
 200         while (1) {
 201                 do {
 202                         mmc_stat = readl(&mmc_base->stat);
 203                 } while (mmc_stat == 0);
 204
 205                 if ((mmc_stat & ERRI_MASK) != 0)
 206                         return (unsigned char) mmc_stat;
 207
 208                 if (mmc_stat & BRR_MASK) {
 209                         unsigned int k;
 210
 211                         writel(readl(&mmc_base->stat) | BRR_MASK,
 212                                 &mmc_base->stat);
 213                         for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) {
 214                                 *output_buf = readl(&mmc_base->data);
 215                                 output_buf++;
 216                                 read_count += 4;
 217                         }
 218                 }
 219
 220                 if (mmc_stat & BWR_MASK)
 221                         writel(readl(&mmc_base->stat) | BWR_MASK,
 222                                 &mmc_base->stat);
 223
 224                 if (mmc_stat & TC_MASK) {
 225                         writel(readl(&mmc_base->stat) | TC_MASK,
 226                                 &mmc_base->stat);
 227                         break;
 228                 }
 229         }
 230         return 1;
 231 }
 232
 233 unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur)
 234 {
 235         unsigned char err;
 236         unsigned int argument = 0;
 237         unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val;
 238         unsigned int resp[4];
 239         unsigned short retry_cnt = 2000;
 240
 241         /* Set to Initialization Clock */
 242         err = mmc_clock_config(CLK_400KHZ, 0);
 243         if (err != 1)
 244                 return err;
 245
 246         mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS;
 247         argument = 0x00000000;
 248
 249         ocr_value = (0x1FF << 15);
 250         err = mmc_send_cmd(MMC_CMD0, argument, resp);
 251         if (err != 1)
 252                 return err;
 253
 254         argument = SD_CMD8_CHECK_PATTERN | SD_CMD8_2_7_3_6_V_RANGE;
 255         err = mmc_send_cmd(MMC_SDCMD8, argument, resp);
 256         hcs_val = (err == 1) ?
 257                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR :
 258                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE;
 259
 260         argument = 0x0000 << 16;
 261         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 262         if (err == 1) {
 263                 mmc_card_cur->card_type = SD_CARD;
 264                 ocr_value |= hcs_val;
 265                 ret_cmd41 = MMC_ACMD41;
 266         } else {
 267                 mmc_card_cur->card_type = MMC_CARD;
 268                 ocr_value |= MMC_OCR_REG_ACCESS_MODE_SECTOR;
 269                 ret_cmd41 = MMC_CMD1;
 270                 writel(readl(&mmc_base->con) & ~OD, &mmc_base->con);
 271                 writel(readl(&mmc_base->con) | OPENDRAIN, &mmc_base->con);
 272         }
 273
 274         argument = ocr_value;
 275         err = mmc_send_cmd(ret_cmd41, argument, resp);
 276         if (err != 1)
 277                 return err;
 278
 279         ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 280
 281         while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) {
 282                 retry_cnt--;
 283                 if (mmc_card_cur->card_type == SD_CARD) {
 284                         argument = 0x0000 << 16;
 285                         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 286                 }
 287
 288                 argument = ocr_value;
 289                 err = mmc_send_cmd(ret_cmd41, argument, resp);
 290                 if (err != 1)
 291                         return err;
 292                 ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 293         }
 294
 295         if (!(ocr_recvd & (0x1 << 31)))
 296                 return 0;
 297
 298         if (mmc_card_cur->card_type == MMC_CARD) {
 299                 if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) ==
 300                         MMC_OCR_REG_ACCESS_MODE_SECTOR) {
 301                         mmc_card_cur->mode = SECTOR_MODE;
 302                 } else {
 303                         mmc_card_cur->mode = BYTE_MODE;
 304                 }
 305
 306                 ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK;
 307         } else {
 308                 if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK)
 309                         == MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) {
 310                         mmc_card_cur->mode = SECTOR_MODE;
 311                 } else {
 312                         mmc_card_cur->mode = BYTE_MODE;
 313                 }
 314                 ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK;
 315         }
 316
 317         ocr_recvd &= ~(0x1 << 31);
 318         if (!(ocr_recvd & ocr_value))
 319                 return 0;
 320
 321         err = mmc_send_cmd(MMC_CMD2, argument, resp);
 322         if (err != 1)
 323                 return err;
 324
 325         if (mmc_card_cur->card_type == MMC_CARD) {
 326                 argument = mmc_card_cur->RCA << 16;
 327                 err = mmc_send_cmd(MMC_CMD3, argument, resp);
 328                 if (err != 1)
 329                         return err;
 330         } else {
 331                 argument = 0x00000000;
 332                 err = mmc_send_cmd(MMC_SDCMD3, argument, resp);
 333                 if (err != 1)
 334                         return err;
 335
 336                 mmc_card_cur->RCA = ((mmc_resp_r6 *) resp)->newpublishedrca;
 337         }
 338
 339         writel(readl(&mmc_base->con) & ~OD, &mmc_base->con);
 340         writel(readl(&mmc_base->con) | NOOPENDRAIN, &mmc_base->con);
 341         return 1;
 342 }
 343
 344 unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data,
 345                                 mmc_csd_reg_t *cur_csd)
 346 {
 347         mmc_extended_csd_reg_t ext_csd;
 348         unsigned int size, count, blk_len, blk_no, card_size, argument;
 349         unsigned char err;
 350         unsigned int resp[4];
 351
 352         if (mmc_dev_data->mode == SECTOR_MODE) {
 353                 if (mmc_dev_data->card_type == SD_CARD) {
 354                         card_size =
 355                                 (((mmc_sd2_csd_reg_t *) cur_csd)->
 356                                 c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) |
 357                                 ((((mmc_sd2_csd_reg_t *) cur_csd)->
 358                                 c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK)
 359                                 << MMC_SD2_CSD_C_SIZE_MSB_OFFSET);
 360                         mmc_dev_data->size = card_size * 1024;
 361                         if (mmc_dev_data->size == 0)
 362                                 return 0;
 363                 } else {
 364                         argument = 0x00000000;
 365                         err = mmc_send_cmd(MMC_CMD8, argument, resp);
 366                         if (err != 1)
 367                                 return err;
 368                         err = mmc_read_data((unsigned int *) &ext_csd);
 369                         if (err != 1)
 370                                 return err;
 371                         mmc_dev_data->size = ext_csd.sectorcount;
 372
 373                         if (mmc_dev_data->size == 0)
 374                                 mmc_dev_data->size = 8388608;
 375                 }
 376         } else {
 377                 if (cur_csd->c_size_mult >= 8)
 378                         return 0;
 379
 380                 if (cur_csd->read_bl_len >= 12)
 381                         return 0;
 382
 383                 /* Compute size */
 384                 count = 1 << (cur_csd->c_size_mult + 2);
 385                 card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) |
 386                         ((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK)
 387                         << MMC_CSD_C_SIZE_MSB_OFFSET);
 388                 blk_no = (card_size + 1) * count;
 389                 blk_len = 1 << cur_csd->read_bl_len;
 390                 size = blk_no * blk_len;
 391                 mmc_dev_data->size = size / MMCSD_SECTOR_SIZE;
 392                 if (mmc_dev_data->size == 0)
 393                         return 0;
 394         }
 395         return 1;
 396 }
 397
 398 unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes,
 399                                  mmc_card_data *mmc_c,
 400                                  unsigned long *output_buf)
 401 {
 402         unsigned char err;
 403         unsigned int argument;
 404         unsigned int resp[4];
 405         unsigned int num_sec_val =
 406                 (num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE;
 407         unsigned int sec_inc_val;
 408
 409         if (num_sec_val == 0)
 410                 return 1;
 411
 412         if (mmc_c->mode == SECTOR_MODE) {
 413                 argument = start_sec;
 414                 sec_inc_val = 1;
 415         } else {
 416                 argument = start_sec * MMCSD_SECTOR_SIZE;
 417                 sec_inc_val = MMCSD_SECTOR_SIZE;
 418         }
 419
 420         while (num_sec_val) {
 421                 err = mmc_send_cmd(MMC_CMD17, argument, resp);
 422                 if (err != 1)
 423                         return err;
 424
 425                 err = mmc_read_data((unsigned int *) output_buf);
 426                 if (err != 1)
 427                         return err;
 428
 429                 output_buf += (MMCSD_SECTOR_SIZE / 4);
 430                 argument += sec_inc_val;
 431                 num_sec_val--;
 432         }
 433         return 1;
 434 }
 435
 436 unsigned char configure_mmc(mmc_card_data *mmc_card_cur)
 437 {
 438         unsigned char ret_val;
 439         unsigned int argument;
 440         unsigned int resp[4];
 441         unsigned int trans_clk, trans_fact, trans_unit, retries = 2;
 442         mmc_csd_reg_t Card_CSD;
 443         unsigned char trans_speed;
 444
 445         ret_val = mmc_init_setup();
 446
 447         if (ret_val != 1)
 448                 return ret_val;
 449
 450         do {
 451                 ret_val = mmc_detect_card(mmc_card_cur);
 452                 retries--;
 453         } while ((retries > 0) && (ret_val != 1));
 454
 455         argument = mmc_card_cur->RCA << 16;
 456         ret_val = mmc_send_cmd(MMC_CMD9, argument, resp);
 457         if (ret_val != 1)
 458                 return ret_val;
 459
 460         ((unsigned int *) &Card_CSD)[3] = resp[3];
 461         ((unsigned int *) &Card_CSD)[2] = resp[2];
 462         ((unsigned int *) &Card_CSD)[1] = resp[1];
 463         ((unsigned int *) &Card_CSD)[0] = resp[0];
 464
 465         if (mmc_card_cur->card_type == MMC_CARD)
 466                 mmc_card_cur->version = Card_CSD.spec_vers;
 467
 468         trans_speed = Card_CSD.tran_speed;
 469
 470         ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, resp);
 471         if (ret_val != 1)
 472                 return ret_val;
 473
 474         trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK;
 475         trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK;
 476
 477         if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ)
 478                 return 0;
 479
 480         if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) ||
 481                 (trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0))
 482                 return 0;
 483
 484         trans_unit >>= 0;
 485         trans_fact >>= 3;
 486
 487         trans_clk = mmc_transspeed_val[trans_fact - 1][trans_unit] * 2;
 488         ret_val = mmc_clock_config(CLK_MISC, trans_clk);
 489
 490         if (ret_val != 1)
 491                 return ret_val;
 492
 493         argument = mmc_card_cur->RCA << 16;
 494         ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, resp);
 495         if (ret_val != 1)
 496                 return ret_val;
 497
 498         /* Configure the block length to 512 bytes */
 499         argument = MMCSD_SECTOR_SIZE;
 500         ret_val = mmc_send_cmd(MMC_CMD16, argument, resp);
 501         if (ret_val != 1)
 502                 return ret_val;
 503
 504         /* get the card size in sectors */
 505         ret_val = mmc_read_cardsize(mmc_card_cur, &Card_CSD);
 506         if (ret_val != 1)
 507                 return ret_val;
 508
 509         return 1;
 510 }
 511 unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt,
 512                         void *dst)
 513 {
 514         omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE), &cur_card_data,
 515                                 (unsigned long *) dst);
 516         return 1;
 517 }
 518
 519 int mmc_legacy_init(int verbose)
 520 {
 521         if (configure_mmc(&cur_card_data) != 1)
 522                 return 1;
 523
 524         mmc_blk_dev.if_type = IF_TYPE_MMC;
 525         mmc_blk_dev.part_type = PART_TYPE_DOS;
 526         mmc_blk_dev.dev = 0;
 527         mmc_blk_dev.lun = 0;
 528         mmc_blk_dev.type = 0;
 529
 530         /* FIXME fill in the correct size (is set to 32MByte) */
 531         mmc_blk_dev.blksz = MMCSD_SECTOR_SIZE;
 532         mmc_blk_dev.lba = 0x10000;
 533         mmc_blk_dev.removable = 0;
 534         mmc_blk_dev.block_read = mmc_bread;
 535
 536         fat_register_device(&mmc_blk_dev, 1);
 537         return 0;
 538 }