1 /* 2 * (C) Copyright 2008 3 * Texas Instruments, <www.ti.com> 4 * Sukumar Ghorai <s-ghorai@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 <malloc.h> 28 #include <mmc.h> 29 #include <part.h> 30 #include <i2c.h> 31 #include <twl4030.h> 32 #include <twl6030.h> 33 #include <palmas.h> 34 #include <asm/io.h> 35 #include <asm/arch/mmc_host_def.h> 36 #if !defined(CONFIG_SOC_KEYSTONE) 37 #include <asm/gpio.h> 38 #include <asm/arch/sys_proto.h> 39 #endif 40 #include <dm.h> 41 42 DECLARE_GLOBAL_DATA_PTR; 43 44 /* simplify defines to OMAP_HSMMC_USE_GPIO */ 45 #if (defined(CONFIG_OMAP_GPIO) && !defined(CONFIG_SPL_BUILD)) || \ 46 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT)) 47 #define OMAP_HSMMC_USE_GPIO 48 #else 49 #undef OMAP_HSMMC_USE_GPIO 50 #endif 51 52 /* common definitions for all OMAPs */ 53 #define SYSCTL_SRC (1 << 25) 54 #define SYSCTL_SRD (1 << 26) 55 56 struct omap_hsmmc_data { 57 struct hsmmc *base_addr; 58 struct mmc_config cfg; 59 #ifdef OMAP_HSMMC_USE_GPIO 60 #ifdef CONFIG_DM_MMC 61 struct gpio_desc cd_gpio; /* Change Detect GPIO */ 62 struct gpio_desc wp_gpio; /* Write Protect GPIO */ 63 bool cd_inverted; 64 #else 65 int cd_gpio; 66 int wp_gpio; 67 #endif 68 #endif 69 }; 70 71 /* If we fail after 1 second wait, something is really bad */ 72 #define MAX_RETRY_MS 1000 73 74 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size); 75 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf, 76 unsigned int siz); 77 78 #if defined(OMAP_HSMMC_USE_GPIO) && !defined(CONFIG_DM_MMC) 79 static int omap_mmc_setup_gpio_in(int gpio, const char *label) 80 { 81 int ret; 82 83 #ifndef CONFIG_DM_GPIO 84 if (!gpio_is_valid(gpio)) 85 return -1; 86 #endif 87 ret = gpio_request(gpio, label); 88 if (ret) 89 return ret; 90 91 ret = gpio_direction_input(gpio); 92 if (ret) 93 return ret; 94 95 return gpio; 96 } 97 #endif 98 99 #if defined(CONFIG_OMAP44XX) 100 static void omap4_vmmc_pbias_config(struct mmc *mmc) 101 { 102 u32 value = 0; 103 104 value = readl((*ctrl)->control_pbiaslite); 105 value &= ~(MMC1_PBIASLITE_PWRDNZ | MMC1_PWRDNZ); 106 writel(value, (*ctrl)->control_pbiaslite); 107 value = readl((*ctrl)->control_pbiaslite); 108 value |= MMC1_PBIASLITE_VMODE | MMC1_PBIASLITE_PWRDNZ | MMC1_PWRDNZ; 109 writel(value, (*ctrl)->control_pbiaslite); 110 } 111 #endif 112 113 #if defined(CONFIG_OMAP54XX) && defined(CONFIG_PALMAS_POWER) 114 static void omap5_pbias_config(struct mmc *mmc) 115 { 116 u32 value = 0; 117 118 value = readl((*ctrl)->control_pbias); 119 value &= ~SDCARD_PWRDNZ; 120 writel(value, (*ctrl)->control_pbias); 121 udelay(10); /* wait 10 us */ 122 value &= ~SDCARD_BIAS_PWRDNZ; 123 writel(value, (*ctrl)->control_pbias); 124 125 palmas_mmc1_poweron_ldo(); 126 127 value = readl((*ctrl)->control_pbias); 128 value |= SDCARD_BIAS_PWRDNZ; 129 writel(value, (*ctrl)->control_pbias); 130 udelay(150); /* wait 150 us */ 131 value |= SDCARD_PWRDNZ; 132 writel(value, (*ctrl)->control_pbias); 133 udelay(150); /* wait 150 us */ 134 } 135 #endif 136 137 static unsigned char mmc_board_init(struct mmc *mmc) 138 { 139 #if defined(CONFIG_OMAP34XX) 140 t2_t *t2_base = (t2_t *)T2_BASE; 141 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 142 u32 pbias_lite; 143 144 pbias_lite = readl(&t2_base->pbias_lite); 145 pbias_lite &= ~(PBIASLITEPWRDNZ1 | PBIASLITEPWRDNZ0); 146 #ifdef CONFIG_TARGET_OMAP3_CAIRO 147 /* for cairo board, we need to set up 1.8 Volt bias level on MMC1 */ 148 pbias_lite &= ~PBIASLITEVMODE0; 149 #endif 150 writel(pbias_lite, &t2_base->pbias_lite); 151 152 writel(pbias_lite | PBIASLITEPWRDNZ1 | 153 PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0, 154 &t2_base->pbias_lite); 155 156 writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL, 157 &t2_base->devconf0); 158 159 writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL, 160 &t2_base->devconf1); 161 162 /* Change from default of 52MHz to 26MHz if necessary */ 163 if (!(mmc->cfg->host_caps & MMC_MODE_HS_52MHz)) 164 writel(readl(&t2_base->ctl_prog_io1) & ~CTLPROGIO1SPEEDCTRL, 165 &t2_base->ctl_prog_io1); 166 167 writel(readl(&prcm_base->fclken1_core) | 168 EN_MMC1 | EN_MMC2 | EN_MMC3, 169 &prcm_base->fclken1_core); 170 171 writel(readl(&prcm_base->iclken1_core) | 172 EN_MMC1 | EN_MMC2 | EN_MMC3, 173 &prcm_base->iclken1_core); 174 #endif 175 176 #if defined(CONFIG_OMAP44XX) 177 /* PBIAS config needed for MMC1 only */ 178 if (mmc->block_dev.devnum == 0) 179 omap4_vmmc_pbias_config(mmc); 180 #endif 181 #if defined(CONFIG_OMAP54XX) && defined(CONFIG_PALMAS_POWER) 182 if (mmc->block_dev.devnum == 0) 183 omap5_pbias_config(mmc); 184 #endif 185 186 return 0; 187 } 188 189 void mmc_init_stream(struct hsmmc *mmc_base) 190 { 191 ulong start; 192 193 writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con); 194 195 writel(MMC_CMD0, &mmc_base->cmd); 196 start = get_timer(0); 197 while (!(readl(&mmc_base->stat) & CC_MASK)) { 198 if (get_timer(0) - start > MAX_RETRY_MS) { 199 printf("%s: timedout waiting for cc!\n", __func__); 200 return; 201 } 202 } 203 writel(CC_MASK, &mmc_base->stat) 204 ; 205 writel(MMC_CMD0, &mmc_base->cmd) 206 ; 207 start = get_timer(0); 208 while (!(readl(&mmc_base->stat) & CC_MASK)) { 209 if (get_timer(0) - start > MAX_RETRY_MS) { 210 printf("%s: timedout waiting for cc2!\n", __func__); 211 return; 212 } 213 } 214 writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con); 215 } 216 217 218 static int omap_hsmmc_init_setup(struct mmc *mmc) 219 { 220 struct hsmmc *mmc_base; 221 unsigned int reg_val; 222 unsigned int dsor; 223 ulong start; 224 225 mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr; 226 mmc_board_init(mmc); 227 228 writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET, 229 &mmc_base->sysconfig); 230 start = get_timer(0); 231 while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0) { 232 if (get_timer(0) - start > MAX_RETRY_MS) { 233 printf("%s: timedout waiting for cc2!\n", __func__); 234 return -ETIMEDOUT; 235 } 236 } 237 writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl); 238 start = get_timer(0); 239 while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0) { 240 if (get_timer(0) - start > MAX_RETRY_MS) { 241 printf("%s: timedout waiting for softresetall!\n", 242 __func__); 243 return -ETIMEDOUT; 244 } 245 } 246 writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl); 247 writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP, 248 &mmc_base->capa); 249 250 reg_val = readl(&mmc_base->con) & RESERVED_MASK; 251 252 writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH | 253 MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK | 254 HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con); 255 256 dsor = 240; 257 mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK), 258 (ICE_STOP | DTO_15THDTO | CEN_DISABLE)); 259 mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK, 260 (dsor << CLKD_OFFSET) | ICE_OSCILLATE); 261 start = get_timer(0); 262 while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) { 263 if (get_timer(0) - start > MAX_RETRY_MS) { 264 printf("%s: timedout waiting for ics!\n", __func__); 265 return -ETIMEDOUT; 266 } 267 } 268 writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl); 269 270 writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl); 271 272 writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE | 273 IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC, 274 &mmc_base->ie); 275 276 mmc_init_stream(mmc_base); 277 278 return 0; 279 } 280 281 /* 282 * MMC controller internal finite state machine reset 283 * 284 * Used to reset command or data internal state machines, using respectively 285 * SRC or SRD bit of SYSCTL register 286 */ 287 static void mmc_reset_controller_fsm(struct hsmmc *mmc_base, u32 bit) 288 { 289 ulong start; 290 291 mmc_reg_out(&mmc_base->sysctl, bit, bit); 292 293 /* 294 * CMD(DAT) lines reset procedures are slightly different 295 * for OMAP3 and OMAP4(AM335x,OMAP5,DRA7xx). 296 * According to OMAP3 TRM: 297 * Set SRC(SRD) bit in MMCHS_SYSCTL register to 0x1 and wait until it 298 * returns to 0x0. 299 * According to OMAP4(AM335x,OMAP5,DRA7xx) TRMs, CMD(DATA) lines reset 300 * procedure steps must be as follows: 301 * 1. Initiate CMD(DAT) line reset by writing 0x1 to SRC(SRD) bit in 302 * MMCHS_SYSCTL register (SD_SYSCTL for AM335x). 303 * 2. Poll the SRC(SRD) bit until it is set to 0x1. 304 * 3. Wait until the SRC (SRD) bit returns to 0x0 305 * (reset procedure is completed). 306 */ 307 #if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \ 308 defined(CONFIG_AM33XX) || defined(CONFIG_AM43XX) 309 if (!(readl(&mmc_base->sysctl) & bit)) { 310 start = get_timer(0); 311 while (!(readl(&mmc_base->sysctl) & bit)) { 312 if (get_timer(0) - start > MAX_RETRY_MS) 313 return; 314 } 315 } 316 #endif 317 start = get_timer(0); 318 while ((readl(&mmc_base->sysctl) & bit) != 0) { 319 if (get_timer(0) - start > MAX_RETRY_MS) { 320 printf("%s: timedout waiting for sysctl %x to clear\n", 321 __func__, bit); 322 return; 323 } 324 } 325 } 326 327 static int omap_hsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, 328 struct mmc_data *data) 329 { 330 struct hsmmc *mmc_base; 331 unsigned int flags, mmc_stat; 332 ulong start; 333 334 mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr; 335 start = get_timer(0); 336 while ((readl(&mmc_base->pstate) & (DATI_MASK | CMDI_MASK)) != 0) { 337 if (get_timer(0) - start > MAX_RETRY_MS) { 338 printf("%s: timedout waiting on cmd inhibit to clear\n", 339 __func__); 340 return -ETIMEDOUT; 341 } 342 } 343 writel(0xFFFFFFFF, &mmc_base->stat); 344 start = get_timer(0); 345 while (readl(&mmc_base->stat)) { 346 if (get_timer(0) - start > MAX_RETRY_MS) { 347 printf("%s: timedout waiting for STAT (%x) to clear\n", 348 __func__, readl(&mmc_base->stat)); 349 return -ETIMEDOUT; 350 } 351 } 352 /* 353 * CMDREG 354 * CMDIDX[13:8] : Command index 355 * DATAPRNT[5] : Data Present Select 356 * ENCMDIDX[4] : Command Index Check Enable 357 * ENCMDCRC[3] : Command CRC Check Enable 358 * RSPTYP[1:0] 359 * 00 = No Response 360 * 01 = Length 136 361 * 10 = Length 48 362 * 11 = Length 48 Check busy after response 363 */ 364 /* Delay added before checking the status of frq change 365 * retry not supported by mmc.c(core file) 366 */ 367 if (cmd->cmdidx == SD_CMD_APP_SEND_SCR) 368 udelay(50000); /* wait 50 ms */ 369 370 if (!(cmd->resp_type & MMC_RSP_PRESENT)) 371 flags = 0; 372 else if (cmd->resp_type & MMC_RSP_136) 373 flags = RSP_TYPE_LGHT136 | CICE_NOCHECK; 374 else if (cmd->resp_type & MMC_RSP_BUSY) 375 flags = RSP_TYPE_LGHT48B; 376 else 377 flags = RSP_TYPE_LGHT48; 378 379 /* enable default flags */ 380 flags = flags | (CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK | 381 MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE); 382 383 if (cmd->resp_type & MMC_RSP_CRC) 384 flags |= CCCE_CHECK; 385 if (cmd->resp_type & MMC_RSP_OPCODE) 386 flags |= CICE_CHECK; 387 388 if (data) { 389 if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) || 390 (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) { 391 flags |= (MSBS_MULTIBLK | BCE_ENABLE); 392 data->blocksize = 512; 393 writel(data->blocksize | (data->blocks << 16), 394 &mmc_base->blk); 395 } else 396 writel(data->blocksize | NBLK_STPCNT, &mmc_base->blk); 397 398 if (data->flags & MMC_DATA_READ) 399 flags |= (DP_DATA | DDIR_READ); 400 else 401 flags |= (DP_DATA | DDIR_WRITE); 402 } 403 404 writel(cmd->cmdarg, &mmc_base->arg); 405 udelay(20); /* To fix "No status update" error on eMMC */ 406 writel((cmd->cmdidx << 24) | flags, &mmc_base->cmd); 407 408 start = get_timer(0); 409 do { 410 mmc_stat = readl(&mmc_base->stat); 411 if (get_timer(0) - start > MAX_RETRY_MS) { 412 printf("%s : timeout: No status update\n", __func__); 413 return -ETIMEDOUT; 414 } 415 } while (!mmc_stat); 416 417 if ((mmc_stat & IE_CTO) != 0) { 418 mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC); 419 return -ETIMEDOUT; 420 } else if ((mmc_stat & ERRI_MASK) != 0) 421 return -1; 422 423 if (mmc_stat & CC_MASK) { 424 writel(CC_MASK, &mmc_base->stat); 425 if (cmd->resp_type & MMC_RSP_PRESENT) { 426 if (cmd->resp_type & MMC_RSP_136) { 427 /* response type 2 */ 428 cmd->response[3] = readl(&mmc_base->rsp10); 429 cmd->response[2] = readl(&mmc_base->rsp32); 430 cmd->response[1] = readl(&mmc_base->rsp54); 431 cmd->response[0] = readl(&mmc_base->rsp76); 432 } else 433 /* response types 1, 1b, 3, 4, 5, 6 */ 434 cmd->response[0] = readl(&mmc_base->rsp10); 435 } 436 } 437 438 if (data && (data->flags & MMC_DATA_READ)) { 439 mmc_read_data(mmc_base, data->dest, 440 data->blocksize * data->blocks); 441 } else if (data && (data->flags & MMC_DATA_WRITE)) { 442 mmc_write_data(mmc_base, data->src, 443 data->blocksize * data->blocks); 444 } 445 return 0; 446 } 447 448 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size) 449 { 450 unsigned int *output_buf = (unsigned int *)buf; 451 unsigned int mmc_stat; 452 unsigned int count; 453 454 /* 455 * Start Polled Read 456 */ 457 count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size; 458 count /= 4; 459 460 while (size) { 461 ulong start = get_timer(0); 462 do { 463 mmc_stat = readl(&mmc_base->stat); 464 if (get_timer(0) - start > MAX_RETRY_MS) { 465 printf("%s: timedout waiting for status!\n", 466 __func__); 467 return -ETIMEDOUT; 468 } 469 } while (mmc_stat == 0); 470 471 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0) 472 mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD); 473 474 if ((mmc_stat & ERRI_MASK) != 0) 475 return 1; 476 477 if (mmc_stat & BRR_MASK) { 478 unsigned int k; 479 480 writel(readl(&mmc_base->stat) | BRR_MASK, 481 &mmc_base->stat); 482 for (k = 0; k < count; k++) { 483 *output_buf = readl(&mmc_base->data); 484 output_buf++; 485 } 486 size -= (count*4); 487 } 488 489 if (mmc_stat & BWR_MASK) 490 writel(readl(&mmc_base->stat) | BWR_MASK, 491 &mmc_base->stat); 492 493 if (mmc_stat & TC_MASK) { 494 writel(readl(&mmc_base->stat) | TC_MASK, 495 &mmc_base->stat); 496 break; 497 } 498 } 499 return 0; 500 } 501 502 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf, 503 unsigned int size) 504 { 505 unsigned int *input_buf = (unsigned int *)buf; 506 unsigned int mmc_stat; 507 unsigned int count; 508 509 /* 510 * Start Polled Write 511 */ 512 count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size; 513 count /= 4; 514 515 while (size) { 516 ulong start = get_timer(0); 517 do { 518 mmc_stat = readl(&mmc_base->stat); 519 if (get_timer(0) - start > MAX_RETRY_MS) { 520 printf("%s: timedout waiting for status!\n", 521 __func__); 522 return -ETIMEDOUT; 523 } 524 } while (mmc_stat == 0); 525 526 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0) 527 mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD); 528 529 if ((mmc_stat & ERRI_MASK) != 0) 530 return 1; 531 532 if (mmc_stat & BWR_MASK) { 533 unsigned int k; 534 535 writel(readl(&mmc_base->stat) | BWR_MASK, 536 &mmc_base->stat); 537 for (k = 0; k < count; k++) { 538 writel(*input_buf, &mmc_base->data); 539 input_buf++; 540 } 541 size -= (count*4); 542 } 543 544 if (mmc_stat & BRR_MASK) 545 writel(readl(&mmc_base->stat) | BRR_MASK, 546 &mmc_base->stat); 547 548 if (mmc_stat & TC_MASK) { 549 writel(readl(&mmc_base->stat) | TC_MASK, 550 &mmc_base->stat); 551 break; 552 } 553 } 554 return 0; 555 } 556 557 static void omap_hsmmc_set_ios(struct mmc *mmc) 558 { 559 struct hsmmc *mmc_base; 560 unsigned int dsor = 0; 561 ulong start; 562 563 mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr; 564 /* configue bus width */ 565 switch (mmc->bus_width) { 566 case 8: 567 writel(readl(&mmc_base->con) | DTW_8_BITMODE, 568 &mmc_base->con); 569 break; 570 571 case 4: 572 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE, 573 &mmc_base->con); 574 writel(readl(&mmc_base->hctl) | DTW_4_BITMODE, 575 &mmc_base->hctl); 576 break; 577 578 case 1: 579 default: 580 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE, 581 &mmc_base->con); 582 writel(readl(&mmc_base->hctl) & ~DTW_4_BITMODE, 583 &mmc_base->hctl); 584 break; 585 } 586 587 /* configure clock with 96Mhz system clock. 588 */ 589 if (mmc->clock != 0) { 590 dsor = (MMC_CLOCK_REFERENCE * 1000000 / mmc->clock); 591 if ((MMC_CLOCK_REFERENCE * 1000000) / dsor > mmc->clock) 592 dsor++; 593 } 594 595 mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK), 596 (ICE_STOP | DTO_15THDTO | CEN_DISABLE)); 597 598 mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK, 599 (dsor << CLKD_OFFSET) | ICE_OSCILLATE); 600 601 start = get_timer(0); 602 while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) { 603 if (get_timer(0) - start > MAX_RETRY_MS) { 604 printf("%s: timedout waiting for ics!\n", __func__); 605 return; 606 } 607 } 608 writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl); 609 } 610 611 #ifdef OMAP_HSMMC_USE_GPIO 612 #ifdef CONFIG_DM_MMC 613 static int omap_hsmmc_getcd(struct mmc *mmc) 614 { 615 struct omap_hsmmc_data *priv = mmc->priv; 616 int value; 617 618 value = dm_gpio_get_value(&priv->cd_gpio); 619 /* if no CD return as 1 */ 620 if (value < 0) 621 return 1; 622 623 if (priv->cd_inverted) 624 return !value; 625 return value; 626 } 627 628 static int omap_hsmmc_getwp(struct mmc *mmc) 629 { 630 struct omap_hsmmc_data *priv = mmc->priv; 631 int value; 632 633 value = dm_gpio_get_value(&priv->wp_gpio); 634 /* if no WP return as 0 */ 635 if (value < 0) 636 return 0; 637 return value; 638 } 639 #else 640 static int omap_hsmmc_getcd(struct mmc *mmc) 641 { 642 struct omap_hsmmc_data *priv_data = mmc->priv; 643 int cd_gpio; 644 645 /* if no CD return as 1 */ 646 cd_gpio = priv_data->cd_gpio; 647 if (cd_gpio < 0) 648 return 1; 649 650 /* NOTE: assumes card detect signal is active-low */ 651 return !gpio_get_value(cd_gpio); 652 } 653 654 static int omap_hsmmc_getwp(struct mmc *mmc) 655 { 656 struct omap_hsmmc_data *priv_data = mmc->priv; 657 int wp_gpio; 658 659 /* if no WP return as 0 */ 660 wp_gpio = priv_data->wp_gpio; 661 if (wp_gpio < 0) 662 return 0; 663 664 /* NOTE: assumes write protect signal is active-high */ 665 return gpio_get_value(wp_gpio); 666 } 667 #endif 668 #endif 669 670 static const struct mmc_ops omap_hsmmc_ops = { 671 .send_cmd = omap_hsmmc_send_cmd, 672 .set_ios = omap_hsmmc_set_ios, 673 .init = omap_hsmmc_init_setup, 674 #ifdef OMAP_HSMMC_USE_GPIO 675 .getcd = omap_hsmmc_getcd, 676 .getwp = omap_hsmmc_getwp, 677 #endif 678 }; 679 680 #ifndef CONFIG_DM_MMC 681 int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max, int cd_gpio, 682 int wp_gpio) 683 { 684 struct mmc *mmc; 685 struct omap_hsmmc_data *priv_data; 686 struct mmc_config *cfg; 687 uint host_caps_val; 688 689 priv_data = malloc(sizeof(*priv_data)); 690 if (priv_data == NULL) 691 return -1; 692 693 host_caps_val = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS; 694 695 switch (dev_index) { 696 case 0: 697 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE; 698 break; 699 #ifdef OMAP_HSMMC2_BASE 700 case 1: 701 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC2_BASE; 702 #if (defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \ 703 defined(CONFIG_DRA7XX) || defined(CONFIG_AM57XX) || \ 704 defined(CONFIG_AM33XX) || \ 705 defined(CONFIG_AM43XX) || defined(CONFIG_SOC_KEYSTONE)) && \ 706 defined(CONFIG_HSMMC2_8BIT) 707 /* Enable 8-bit interface for eMMC on OMAP4/5 or DRA7XX */ 708 host_caps_val |= MMC_MODE_8BIT; 709 #endif 710 break; 711 #endif 712 #ifdef OMAP_HSMMC3_BASE 713 case 2: 714 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC3_BASE; 715 #if (defined(CONFIG_DRA7XX) || defined(CONFIG_AM57XX)) && defined(CONFIG_HSMMC3_8BIT) 716 /* Enable 8-bit interface for eMMC on DRA7XX */ 717 host_caps_val |= MMC_MODE_8BIT; 718 #endif 719 break; 720 #endif 721 default: 722 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE; 723 return 1; 724 } 725 #ifdef OMAP_HSMMC_USE_GPIO 726 /* on error gpio values are set to -1, which is what we want */ 727 priv_data->cd_gpio = omap_mmc_setup_gpio_in(cd_gpio, "mmc_cd"); 728 priv_data->wp_gpio = omap_mmc_setup_gpio_in(wp_gpio, "mmc_wp"); 729 #endif 730 731 cfg = &priv_data->cfg; 732 733 cfg->name = "OMAP SD/MMC"; 734 cfg->ops = &omap_hsmmc_ops; 735 736 cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; 737 cfg->host_caps = host_caps_val & ~host_caps_mask; 738 739 cfg->f_min = 400000; 740 741 if (f_max != 0) 742 cfg->f_max = f_max; 743 else { 744 if (cfg->host_caps & MMC_MODE_HS) { 745 if (cfg->host_caps & MMC_MODE_HS_52MHz) 746 cfg->f_max = 52000000; 747 else 748 cfg->f_max = 26000000; 749 } else 750 cfg->f_max = 20000000; 751 } 752 753 cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; 754 755 #if defined(CONFIG_OMAP34XX) 756 /* 757 * Silicon revs 2.1 and older do not support multiblock transfers. 758 */ 759 if ((get_cpu_family() == CPU_OMAP34XX) && (get_cpu_rev() <= CPU_3XX_ES21)) 760 cfg->b_max = 1; 761 #endif 762 mmc = mmc_create(cfg, priv_data); 763 if (mmc == NULL) 764 return -1; 765 766 return 0; 767 } 768 #else 769 static int omap_hsmmc_ofdata_to_platdata(struct udevice *dev) 770 { 771 struct omap_hsmmc_data *priv = dev_get_priv(dev); 772 const void *fdt = gd->fdt_blob; 773 int node = dev->of_offset; 774 struct mmc_config *cfg; 775 int val; 776 777 priv->base_addr = map_physmem(dev_get_addr(dev), sizeof(struct hsmmc *), 778 MAP_NOCACHE); 779 cfg = &priv->cfg; 780 781 cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS; 782 val = fdtdec_get_int(fdt, node, "bus-width", -1); 783 if (val < 0) { 784 printf("error: bus-width property missing\n"); 785 return -ENOENT; 786 } 787 788 switch (val) { 789 case 0x8: 790 cfg->host_caps |= MMC_MODE_8BIT; 791 case 0x4: 792 cfg->host_caps |= MMC_MODE_4BIT; 793 break; 794 default: 795 printf("error: invalid bus-width property\n"); 796 return -ENOENT; 797 } 798 799 cfg->f_min = 400000; 800 cfg->f_max = fdtdec_get_int(fdt, node, "max-frequency", 52000000); 801 cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; 802 cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; 803 804 #ifdef OMAP_HSMMC_USE_GPIO 805 priv->cd_inverted = fdtdec_get_bool(fdt, node, "cd-inverted"); 806 #endif 807 808 return 0; 809 } 810 811 static int omap_hsmmc_probe(struct udevice *dev) 812 { 813 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); 814 struct omap_hsmmc_data *priv = dev_get_priv(dev); 815 struct mmc_config *cfg; 816 struct mmc *mmc; 817 818 cfg = &priv->cfg; 819 cfg->name = "OMAP SD/MMC"; 820 cfg->ops = &omap_hsmmc_ops; 821 822 mmc = mmc_create(cfg, priv); 823 if (mmc == NULL) 824 return -1; 825 826 #ifdef OMAP_HSMMC_USE_GPIO 827 gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN); 828 gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio, GPIOD_IS_IN); 829 #endif 830 831 mmc->dev = dev; 832 upriv->mmc = mmc; 833 834 return 0; 835 } 836 837 static const struct udevice_id omap_hsmmc_ids[] = { 838 { .compatible = "ti,omap3-hsmmc" }, 839 { .compatible = "ti,omap4-hsmmc" }, 840 { .compatible = "ti,am33xx-hsmmc" }, 841 { } 842 }; 843 844 U_BOOT_DRIVER(omap_hsmmc) = { 845 .name = "omap_hsmmc", 846 .id = UCLASS_MMC, 847 .of_match = omap_hsmmc_ids, 848 .ofdata_to_platdata = omap_hsmmc_ofdata_to_platdata, 849 .probe = omap_hsmmc_probe, 850 .priv_auto_alloc_size = sizeof(struct omap_hsmmc_data), 851 }; 852 #endif 853