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/io.h>
  32 #include <asm/arch/mmc.h>
  33
  34 const unsigned short mmc_transspeed_val[15][4] = {
  35         {CLKD(10, 1), CLKD(10, 10), CLKD(10, 100), CLKD(10, 1000)},
  36         {CLKD(12, 1), CLKD(12, 10), CLKD(12, 100), CLKD(12, 1000)},
  37         {CLKD(13, 1), CLKD(13, 10), CLKD(13, 100), CLKD(13, 1000)},
  38         {CLKD(15, 1), CLKD(15, 10), CLKD(15, 100), CLKD(15, 1000)},
  39         {CLKD(20, 1), CLKD(20, 10), CLKD(20, 100), CLKD(20, 1000)},
  40         {CLKD(26, 1), CLKD(26, 10), CLKD(26, 100), CLKD(26, 1000)},
  41         {CLKD(30, 1), CLKD(30, 10), CLKD(30, 100), CLKD(30, 1000)},
  42         {CLKD(35, 1), CLKD(35, 10), CLKD(35, 100), CLKD(35, 1000)},
  43         {CLKD(40, 1), CLKD(40, 10), CLKD(40, 100), CLKD(40, 1000)},
  44         {CLKD(45, 1), CLKD(45, 10), CLKD(45, 100), CLKD(45, 1000)},
  45         {CLKD(52, 1), CLKD(52, 10), CLKD(52, 100), CLKD(52, 1000)},
  46         {CLKD(55, 1), CLKD(55, 10), CLKD(55, 100), CLKD(55, 1000)},
  47         {CLKD(60, 1), CLKD(60, 10), CLKD(60, 100), CLKD(60, 1000)},
  48         {CLKD(70, 1), CLKD(70, 10), CLKD(70, 100), CLKD(70, 1000)},
  49         {CLKD(80, 1), CLKD(80, 10), CLKD(80, 100), CLKD(80, 1000)}
  50 };
  51
  52 mmc_card_data cur_card_data;
  53 static block_dev_desc_t mmc_blk_dev;
  54 static hsmmc_t *mmc_base = (hsmmc_t *)OMAP_HSMMC_BASE;
  55
  56 block_dev_desc_t *mmc_get_dev(int dev)
  57 {
  58         return (block_dev_desc_t *) &mmc_blk_dev;
  59 }
  60
  61 void twl4030_mmc_config(void)
  62 {
  63         unsigned char data;
  64
  65         data = DEV_GRP_P1;
  66         i2c_write(PWRMGT_ADDR_ID4, VMMC1_DEV_GRP, 1, &data, 1);
  67         data = VMMC1_VSEL_30;
  68         i2c_write(PWRMGT_ADDR_ID4, VMMC1_DEDICATED, 1, &data, 1);
  69 }
  70
  71 unsigned char mmc_board_init(void)
  72 {
  73         t2_t *t2_base = (t2_t *)T2_BASE;
  74
  75         twl4030_mmc_config();
  76
  77         writel(readl(&t2_base->pbias_lite) | PBIASLITEPWRDNZ1 |
  78                 PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
  79                 &t2_base->pbias_lite);
  80
  81         writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
  82                 &t2_base->devconf0);
  83
  84         return 1;
  85 }
  86
  87 void mmc_init_stream(void)
  88 {
  89         writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
  90
  91         writel(MMC_CMD0, &mmc_base->cmd);
  92         while (!(readl(&mmc_base->stat) & CC_MASK));
  93
  94         writel(CC_MASK, &mmc_base->stat);
  95
  96         writel(MMC_CMD0, &mmc_base->cmd);
  97         while (!(readl(&mmc_base->stat) & CC_MASK));
  98
  99         writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
 100 }
 101
 102 unsigned char mmc_clock_config(unsigned int iclk, unsigned short clk_div)
 103 {
 104         unsigned int val;
 105
 106         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 107                         (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 108
 109         switch (iclk) {
 110         case CLK_INITSEQ:
 111                 val = MMC_INIT_SEQ_CLK / 2;
 112                 break;
 113         case CLK_400KHZ:
 114                 val = MMC_400kHz_CLK;
 115                 break;
 116         case CLK_MISC:
 117                 val = clk_div;
 118                 break;
 119         default:
 120                 return 0;
 121         }
 122         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 123                         (val << CLKD_OFFSET) | ICE_OSCILLATE);
 124
 125         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY);
 126
 127         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 128         return 1;
 129 }
 130
 131 unsigned char mmc_init_setup(void)
 132 {
 133         unsigned int reg_val;
 134
 135         mmc_board_init();
 136
 137         writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
 138                 &mmc_base->sysconfig);
 139         while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0);
 140
 141         writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
 142         while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0);
 143
 144         writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
 145         writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
 146                 &mmc_base->capa);
 147
 148         reg_val = readl(&mmc_base->con) & RESERVED_MASK;
 149
 150         writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
 151                 MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
 152                 HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
 153
 154         mmc_clock_config(CLK_INITSEQ, 0);
 155         writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
 156
 157         writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
 158                 IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
 159                 &mmc_base->ie);
 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         unsigned int mmc_stat;
 169
 170         while ((readl(&mmc_base->pstate) & DATI_MASK) == DATI_CMDDIS);
 171
 172         writel(BLEN_512BYTESLEN | NBLK_STPCNT, &mmc_base->blk);
 173         writel(0xFFFFFFFF, &mmc_base->stat);
 174         writel(arg, &mmc_base->arg);
 175         writel(cmd | CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
 176                 MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE,
 177                 &mmc_base->cmd);
 178
 179         while (1) {
 180                 do {
 181                         mmc_stat = readl(&mmc_base->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                         writel(CC_MASK, &mmc_base->stat);
 189                         response[0] = readl(&mmc_base->rsp10);
 190                         if ((cmd & RSP_TYPE_MASK) == RSP_TYPE_LGHT136) {
 191                                 response[1] = readl(&mmc_base->rsp32);
 192                                 response[2] = readl(&mmc_base->rsp54);
 193                                 response[3] = readl(&mmc_base->rsp76);
 194                         }
 195                         break;
 196                 }
 197         }
 198         return 1;
 199 }
 200
 201 unsigned char mmc_read_data(unsigned int *output_buf)
 202 {
 203         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 = readl(&mmc_base->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                         writel(readl(&mmc_base->stat) | BRR_MASK,
 221                                 &mmc_base->stat);
 222                         for (k = 0; k < MMCSD_SECTOR_SIZE / 4; k++) {
 223                                 *output_buf = readl(&mmc_base->data);
 224                                 output_buf++;
 225                                 read_count += 4;
 226                         }
 227                 }
 228
 229                 if (mmc_stat & BWR_MASK)
 230                         writel(readl(&mmc_base->stat) | BWR_MASK,
 231                                 &mmc_base->stat);
 232
 233                 if (mmc_stat & TC_MASK) {
 234                         writel(readl(&mmc_base->stat) | TC_MASK,
 235                                 &mmc_base->stat);
 236                         break;
 237                 }
 238         }
 239         return 1;
 240 }
 241
 242 unsigned char mmc_detect_card(mmc_card_data *mmc_card_cur)
 243 {
 244         unsigned char err;
 245         unsigned int argument = 0;
 246         unsigned int ocr_value, ocr_recvd, ret_cmd41, hcs_val;
 247         unsigned int resp[4];
 248         unsigned short retry_cnt = 2000;
 249
 250         /* Set to Initialization Clock */
 251         err = mmc_clock_config(CLK_400KHZ, 0);
 252         if (err != 1)
 253                 return err;
 254
 255         mmc_card_cur->RCA = MMC_RELATIVE_CARD_ADDRESS;
 256         argument = 0x00000000;
 257
 258         ocr_value = (0x1FF << 15);
 259         err = mmc_send_cmd(MMC_CMD0, argument, resp);
 260         if (err != 1)
 261                 return err;
 262
 263         argument = SD_CMD8_CHECK_PATTERN | SD_CMD8_2_7_3_6_V_RANGE;
 264         err = mmc_send_cmd(MMC_SDCMD8, argument, resp);
 265         hcs_val = (err == 1) ?
 266                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR :
 267                 MMC_OCR_REG_HOST_CAPACITY_SUPPORT_BYTE;
 268
 269         argument = 0x0000 << 16;
 270         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 271         if (err == 1) {
 272                 mmc_card_cur->card_type = SD_CARD;
 273                 ocr_value |= hcs_val;
 274                 ret_cmd41 = MMC_ACMD41;
 275         } else {
 276                 mmc_card_cur->card_type = MMC_CARD;
 277                 ocr_value |= MMC_OCR_REG_ACCESS_MODE_SECTOR;
 278                 ret_cmd41 = MMC_CMD1;
 279                 writel(readl(&mmc_base->con) & ~OD, &mmc_base->con);
 280                 writel(readl(&mmc_base->con) | OPENDRAIN, &mmc_base->con);
 281         }
 282
 283         argument = ocr_value;
 284         err = mmc_send_cmd(ret_cmd41, argument, resp);
 285         if (err != 1)
 286                 return err;
 287
 288         ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 289
 290         while (!(ocr_recvd & (0x1 << 31)) && (retry_cnt > 0)) {
 291                 retry_cnt--;
 292                 if (mmc_card_cur->card_type == SD_CARD) {
 293                         argument = 0x0000 << 16;
 294                         err = mmc_send_cmd(MMC_CMD55, argument, resp);
 295                 }
 296
 297                 argument = ocr_value;
 298                 err = mmc_send_cmd(ret_cmd41, argument, resp);
 299                 if (err != 1)
 300                         return err;
 301                 ocr_recvd = ((mmc_resp_r3 *) resp)->ocr;
 302         }
 303
 304         if (!(ocr_recvd & (0x1 << 31)))
 305                 return 0;
 306
 307         if (mmc_card_cur->card_type == MMC_CARD) {
 308                 if ((ocr_recvd & MMC_OCR_REG_ACCESS_MODE_MASK) ==
 309                         MMC_OCR_REG_ACCESS_MODE_SECTOR) {
 310                         mmc_card_cur->mode = SECTOR_MODE;
 311                 } else {
 312                         mmc_card_cur->mode = BYTE_MODE;
 313                 }
 314
 315                 ocr_recvd &= ~MMC_OCR_REG_ACCESS_MODE_MASK;
 316         } else {
 317                 if ((ocr_recvd & MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK)
 318                         == MMC_OCR_REG_HOST_CAPACITY_SUPPORT_SECTOR) {
 319                         mmc_card_cur->mode = SECTOR_MODE;
 320                 } else {
 321                         mmc_card_cur->mode = BYTE_MODE;
 322                 }
 323                 ocr_recvd &= ~MMC_OCR_REG_HOST_CAPACITY_SUPPORT_MASK;
 324         }
 325
 326         ocr_recvd &= ~(0x1 << 31);
 327         if (!(ocr_recvd & ocr_value))
 328                 return 0;
 329
 330         err = mmc_send_cmd(MMC_CMD2, argument, resp);
 331         if (err != 1)
 332                 return err;
 333
 334         if (mmc_card_cur->card_type == MMC_CARD) {
 335                 argument = mmc_card_cur->RCA << 16;
 336                 err = mmc_send_cmd(MMC_CMD3, argument, resp);
 337                 if (err != 1)
 338                         return err;
 339         } else {
 340                 argument = 0x00000000;
 341                 err = mmc_send_cmd(MMC_SDCMD3, argument, resp);
 342                 if (err != 1)
 343                         return err;
 344
 345                 mmc_card_cur->RCA = ((mmc_resp_r6 *) resp)->newpublishedrca;
 346         }
 347
 348         writel(readl(&mmc_base->con) & ~OD, &mmc_base->con);
 349         writel(readl(&mmc_base->con) | NOOPENDRAIN, &mmc_base->con);
 350         return 1;
 351 }
 352
 353 unsigned char mmc_read_cardsize(mmc_card_data *mmc_dev_data,
 354                                 mmc_csd_reg_t *cur_csd)
 355 {
 356         mmc_extended_csd_reg_t ext_csd;
 357         unsigned int size, count, blk_len, blk_no, card_size, argument;
 358         unsigned char err;
 359         unsigned int resp[4];
 360
 361         if (mmc_dev_data->mode == SECTOR_MODE) {
 362                 if (mmc_dev_data->card_type == SD_CARD) {
 363                         card_size =
 364                                 (((mmc_sd2_csd_reg_t *) cur_csd)->
 365                                 c_size_lsb & MMC_SD2_CSD_C_SIZE_LSB_MASK) |
 366                                 ((((mmc_sd2_csd_reg_t *) cur_csd)->
 367                                 c_size_msb & MMC_SD2_CSD_C_SIZE_MSB_MASK)
 368                                 << MMC_SD2_CSD_C_SIZE_MSB_OFFSET);
 369                         mmc_dev_data->size = card_size * 1024;
 370                         if (mmc_dev_data->size == 0)
 371                                 return 0;
 372                 } else {
 373                         argument = 0x00000000;
 374                         err = mmc_send_cmd(MMC_CMD8, argument, resp);
 375                         if (err != 1)
 376                                 return err;
 377                         err = mmc_read_data((unsigned int *) &ext_csd);
 378                         if (err != 1)
 379                                 return err;
 380                         mmc_dev_data->size = ext_csd.sectorcount;
 381
 382                         if (mmc_dev_data->size == 0)
 383                                 mmc_dev_data->size = 8388608;
 384                 }
 385         } else {
 386                 if (cur_csd->c_size_mult >= 8)
 387                         return 0;
 388
 389                 if (cur_csd->read_bl_len >= 12)
 390                         return 0;
 391
 392                 /* Compute size */
 393                 count = 1 << (cur_csd->c_size_mult + 2);
 394                 card_size = (cur_csd->c_size_lsb & MMC_CSD_C_SIZE_LSB_MASK) |
 395                         ((cur_csd->c_size_msb & MMC_CSD_C_SIZE_MSB_MASK)
 396                         << MMC_CSD_C_SIZE_MSB_OFFSET);
 397                 blk_no = (card_size + 1) * count;
 398                 blk_len = 1 << cur_csd->read_bl_len;
 399                 size = blk_no * blk_len;
 400                 mmc_dev_data->size = size / MMCSD_SECTOR_SIZE;
 401                 if (mmc_dev_data->size == 0)
 402                         return 0;
 403         }
 404         return 1;
 405 }
 406
 407 unsigned char omap_mmc_read_sect(unsigned int start_sec, unsigned int num_bytes,
 408                                  mmc_card_data *mmc_c,
 409                                  unsigned long *output_buf)
 410 {
 411         unsigned char err;
 412         unsigned int argument;
 413         unsigned int resp[4];
 414         unsigned int num_sec_val =
 415                 (num_bytes + (MMCSD_SECTOR_SIZE - 1)) / MMCSD_SECTOR_SIZE;
 416         unsigned int sec_inc_val;
 417
 418         if (num_sec_val == 0)
 419                 return 1;
 420
 421         if (mmc_c->mode == SECTOR_MODE) {
 422                 argument = start_sec;
 423                 sec_inc_val = 1;
 424         } else {
 425                 argument = start_sec * MMCSD_SECTOR_SIZE;
 426                 sec_inc_val = MMCSD_SECTOR_SIZE;
 427         }
 428
 429         while (num_sec_val) {
 430                 err = mmc_send_cmd(MMC_CMD17, argument, resp);
 431                 if (err != 1)
 432                         return err;
 433
 434                 err = mmc_read_data((unsigned int *) output_buf);
 435                 if (err != 1)
 436                         return err;
 437
 438                 output_buf += (MMCSD_SECTOR_SIZE / 4);
 439                 argument += sec_inc_val;
 440                 num_sec_val--;
 441         }
 442         return 1;
 443 }
 444
 445 unsigned char configure_mmc(mmc_card_data *mmc_card_cur)
 446 {
 447         unsigned char ret_val;
 448         unsigned int argument;
 449         unsigned int resp[4];
 450         unsigned int trans_clk, trans_fact, trans_unit, retries = 2;
 451         mmc_csd_reg_t Card_CSD;
 452         unsigned char trans_speed;
 453
 454         ret_val = mmc_init_setup();
 455
 456         if (ret_val != 1)
 457                 return ret_val;
 458
 459         do {
 460                 ret_val = mmc_detect_card(mmc_card_cur);
 461                 retries--;
 462         } while ((retries > 0) && (ret_val != 1));
 463
 464         argument = mmc_card_cur->RCA << 16;
 465         ret_val = mmc_send_cmd(MMC_CMD9, argument, resp);
 466         if (ret_val != 1)
 467                 return ret_val;
 468
 469         ((unsigned int *) &Card_CSD)[3] = resp[3];
 470         ((unsigned int *) &Card_CSD)[2] = resp[2];
 471         ((unsigned int *) &Card_CSD)[1] = resp[1];
 472         ((unsigned int *) &Card_CSD)[0] = resp[0];
 473
 474         if (mmc_card_cur->card_type == MMC_CARD)
 475                 mmc_card_cur->version = Card_CSD.spec_vers;
 476
 477         trans_speed = Card_CSD.tran_speed;
 478
 479         ret_val = mmc_send_cmd(MMC_CMD4, MMC_DSR_DEFAULT << 16, resp);
 480         if (ret_val != 1)
 481                 return ret_val;
 482
 483         trans_unit = trans_speed & MMC_CSD_TRAN_SPEED_UNIT_MASK;
 484         trans_fact = trans_speed & MMC_CSD_TRAN_SPEED_FACTOR_MASK;
 485
 486         if (trans_unit > MMC_CSD_TRAN_SPEED_UNIT_100MHZ)
 487                 return 0;
 488
 489         if ((trans_fact < MMC_CSD_TRAN_SPEED_FACTOR_1_0) ||
 490                 (trans_fact > MMC_CSD_TRAN_SPEED_FACTOR_8_0))
 491                 return 0;
 492
 493         trans_unit >>= 0;
 494         trans_fact >>= 3;
 495
 496         trans_clk = mmc_transspeed_val[trans_fact - 1][trans_unit] * 2;
 497         ret_val = mmc_clock_config(CLK_MISC, trans_clk);
 498
 499         if (ret_val != 1)
 500                 return ret_val;
 501
 502         argument = mmc_card_cur->RCA << 16;
 503         ret_val = mmc_send_cmd(MMC_CMD7_SELECT, argument, resp);
 504         if (ret_val != 1)
 505                 return ret_val;
 506
 507         /* Configure the block length to 512 bytes */
 508         argument = MMCSD_SECTOR_SIZE;
 509         ret_val = mmc_send_cmd(MMC_CMD16, argument, resp);
 510         if (ret_val != 1)
 511                 return ret_val;
 512
 513         /* get the card size in sectors */
 514         ret_val = mmc_read_cardsize(mmc_card_cur, &Card_CSD);
 515         if (ret_val != 1)
 516                 return ret_val;
 517
 518         return 1;
 519 }
 520 unsigned long mmc_bread(int dev_num, unsigned long blknr, lbaint_t blkcnt,
 521                         void *dst)
 522 {
 523         omap_mmc_read_sect(blknr, (blkcnt * MMCSD_SECTOR_SIZE), &cur_card_data,
 524                                 (unsigned long *) dst);
 525         return 1;
 526 }
 527
 528 int mmc_legacy_init(int verbose)
 529 {
 530         if (configure_mmc(&cur_card_data) != 1)
 531                 return 1;
 532
 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 0;
 547 }