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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 | /* * MMCIF eMMC driver. * * Copyright (C) 2010 Renesas Solutions Corp. * Yusuke Goda <yusuke.goda.sx@renesas.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License. * * * TODO * 1. DMA * 2. Power management * 3. Handle MMC errors better * */ #include <linux/dma-mapping.h> #include <linux/mmc/host.h> #include <linux/mmc/card.h> #include <linux/mmc/core.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sdio.h> #include <linux/delay.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/mmc/sh_mmcif.h> #define DRIVER_NAME "sh_mmcif" #define DRIVER_VERSION "2010-04-28" /* CE_CMD_SET */ #define CMD_MASK 0x3f000000 #define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22)) #define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22)) /* R1/R1b/R3/R4/R5 */ #define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22)) /* R2 */ #define CMD_SET_RBSY (1 << 21) /* R1b */ #define CMD_SET_CCSEN (1 << 20) #define CMD_SET_WDAT (1 << 19) /* 1: on data, 0: no data */ #define CMD_SET_DWEN (1 << 18) /* 1: write, 0: read */ #define CMD_SET_CMLTE (1 << 17) /* 1: multi block trans, 0: single */ #define CMD_SET_CMD12EN (1 << 16) /* 1: CMD12 auto issue */ #define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14)) /* index check */ #define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14)) /* check bits check */ #define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14)) /* no check */ #define CMD_SET_CRC7C ((0 << 13) | (0 << 12)) /* CRC7 check*/ #define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12)) /* check bits check*/ #define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12)) /* internal CRC7 check*/ #define CMD_SET_CRC16C (1 << 10) /* 0: CRC16 check*/ #define CMD_SET_CRCSTE (1 << 8) /* 1: not receive CRC status */ #define CMD_SET_TBIT (1 << 7) /* 1: tran mission bit "Low" */ #define CMD_SET_OPDM (1 << 6) /* 1: open/drain */ #define CMD_SET_CCSH (1 << 5) #define CMD_SET_DATW_1 ((0 << 1) | (0 << 0)) /* 1bit */ #define CMD_SET_DATW_4 ((0 << 1) | (1 << 0)) /* 4bit */ #define CMD_SET_DATW_8 ((1 << 1) | (0 << 0)) /* 8bit */ /* CE_CMD_CTRL */ #define CMD_CTRL_BREAK (1 << 0) /* CE_BLOCK_SET */ #define BLOCK_SIZE_MASK 0x0000ffff /* CE_CLK_CTRL */ #define CLK_ENABLE (1 << 24) /* 1: output mmc clock */ #define CLK_CLEAR ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16)) #define CLK_SUP_PCLK ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16)) #define SRSPTO_256 ((1 << 13) | (0 << 12)) /* resp timeout */ #define SRBSYTO_29 ((1 << 11) | (1 << 10) | \ (1 << 9) | (1 << 8)) /* resp busy timeout */ #define SRWDTO_29 ((1 << 7) | (1 << 6) | \ (1 << 5) | (1 << 4)) /* read/write timeout */ #define SCCSTO_29 ((1 << 3) | (1 << 2) | \ (1 << 1) | (1 << 0)) /* ccs timeout */ /* CE_BUF_ACC */ #define BUF_ACC_DMAWEN (1 << 25) #define BUF_ACC_DMAREN (1 << 24) #define BUF_ACC_BUSW_32 (0 << 17) #define BUF_ACC_BUSW_16 (1 << 17) #define BUF_ACC_ATYP (1 << 16) /* CE_INT */ #define INT_CCSDE (1 << 29) #define INT_CMD12DRE (1 << 26) #define INT_CMD12RBE (1 << 25) #define INT_CMD12CRE (1 << 24) #define INT_DTRANE (1 << 23) #define INT_BUFRE (1 << 22) #define INT_BUFWEN (1 << 21) #define INT_BUFREN (1 << 20) #define INT_CCSRCV (1 << 19) #define INT_RBSYE (1 << 17) #define INT_CRSPE (1 << 16) #define INT_CMDVIO (1 << 15) #define INT_BUFVIO (1 << 14) #define INT_WDATERR (1 << 11) #define INT_RDATERR (1 << 10) #define INT_RIDXERR (1 << 9) #define INT_RSPERR (1 << 8) #define INT_CCSTO (1 << 5) #define INT_CRCSTO (1 << 4) #define INT_WDATTO (1 << 3) #define INT_RDATTO (1 << 2) #define INT_RBSYTO (1 << 1) #define INT_RSPTO (1 << 0) #define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \ INT_RDATERR | INT_RIDXERR | INT_RSPERR | \ INT_CCSTO | INT_CRCSTO | INT_WDATTO | \ INT_RDATTO | INT_RBSYTO | INT_RSPTO) /* CE_INT_MASK */ #define MASK_ALL 0x00000000 #define MASK_MCCSDE (1 << 29) #define MASK_MCMD12DRE (1 << 26) #define MASK_MCMD12RBE (1 << 25) #define MASK_MCMD12CRE (1 << 24) #define MASK_MDTRANE (1 << 23) #define MASK_MBUFRE (1 << 22) #define MASK_MBUFWEN (1 << 21) #define MASK_MBUFREN (1 << 20) #define MASK_MCCSRCV (1 << 19) #define MASK_MRBSYE (1 << 17) #define MASK_MCRSPE (1 << 16) #define MASK_MCMDVIO (1 << 15) #define MASK_MBUFVIO (1 << 14) #define MASK_MWDATERR (1 << 11) #define MASK_MRDATERR (1 << 10) #define MASK_MRIDXERR (1 << 9) #define MASK_MRSPERR (1 << 8) #define MASK_MCCSTO (1 << 5) #define MASK_MCRCSTO (1 << 4) #define MASK_MWDATTO (1 << 3) #define MASK_MRDATTO (1 << 2) #define MASK_MRBSYTO (1 << 1) #define MASK_MRSPTO (1 << 0) /* CE_HOST_STS1 */ #define STS1_CMDSEQ (1 << 31) /* CE_HOST_STS2 */ #define STS2_CRCSTE (1 << 31) #define STS2_CRC16E (1 << 30) #define STS2_AC12CRCE (1 << 29) #define STS2_RSPCRC7E (1 << 28) #define STS2_CRCSTEBE (1 << 27) #define STS2_RDATEBE (1 << 26) #define STS2_AC12REBE (1 << 25) #define STS2_RSPEBE (1 << 24) #define STS2_AC12IDXE (1 << 23) #define STS2_RSPIDXE (1 << 22) #define STS2_CCSTO (1 << 15) #define STS2_RDATTO (1 << 14) #define STS2_DATBSYTO (1 << 13) #define STS2_CRCSTTO (1 << 12) #define STS2_AC12BSYTO (1 << 11) #define STS2_RSPBSYTO (1 << 10) #define STS2_AC12RSPTO (1 << 9) #define STS2_RSPTO (1 << 8) #define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \ STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE) #define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \ STS2_DATBSYTO | STS2_CRCSTTO | \ STS2_AC12BSYTO | STS2_RSPBSYTO | \ STS2_AC12RSPTO | STS2_RSPTO) /* CE_VERSION */ #define SOFT_RST_ON (1 << 31) #define SOFT_RST_OFF (0 << 31) #define CLKDEV_EMMC_DATA 52000000 /* 52MHz */ #define CLKDEV_MMC_DATA 20000000 /* 20MHz */ #define CLKDEV_INIT 400000 /* 400 KHz */ struct sh_mmcif_host { struct mmc_host *mmc; struct mmc_data *data; struct mmc_command *cmd; struct platform_device *pd; struct clk *hclk; unsigned int clk; int bus_width; u16 wait_int; u16 sd_error; long timeout; void __iomem *addr; wait_queue_head_t intr_wait; }; static inline void sh_mmcif_bitset(struct sh_mmcif_host *host, unsigned int reg, u32 val) { writel(val | readl(host->addr + reg), host->addr + reg); } static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host, unsigned int reg, u32 val) { writel(~val & readl(host->addr + reg), host->addr + reg); } static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk) { struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE); sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR); if (!clk) return; if (p->sup_pclk && clk == host->clk) sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK); else sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR & (ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16)); sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE); } static void sh_mmcif_sync_reset(struct sh_mmcif_host *host) { u32 tmp; tmp = 0x010f0000 & sh_mmcif_readl(host->addr, MMCIF_CE_CLK_CTRL); sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON); sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF); sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp | SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); /* byte swap on */ sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP); } static int sh_mmcif_error_manage(struct sh_mmcif_host *host) { u32 state1, state2; int ret, timeout = 10000000; host->sd_error = 0; host->wait_int = 0; state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1); state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2); pr_debug("%s: ERR HOST_STS1 = %08x\n", DRIVER_NAME, state1); pr_debug("%s: ERR HOST_STS2 = %08x\n", DRIVER_NAME, state2); if (state1 & STS1_CMDSEQ) { sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK); sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK); while (1) { timeout--; if (timeout < 0) { pr_err(DRIVER_NAME": Forceed end of " \ "command sequence timeout err\n"); return -EIO; } if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1) & STS1_CMDSEQ)) break; mdelay(1); } sh_mmcif_sync_reset(host); pr_debug(DRIVER_NAME": Forced end of command sequence\n"); return -EIO; } if (state2 & STS2_CRC_ERR) { pr_debug(DRIVER_NAME": Happened CRC error\n"); ret = -EIO; } else if (state2 & STS2_TIMEOUT_ERR) { pr_debug(DRIVER_NAME": Happened Timeout error\n"); ret = -ETIMEDOUT; } else { pr_debug(DRIVER_NAME": Happened End/Index error\n"); ret = -EIO; } return ret; } static int sh_mmcif_single_read(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 blocksize, i, *p = sg_virt(data->sg); host->wait_int = 0; /* buf read enable */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) return sh_mmcif_error_manage(host); host->wait_int = 0; blocksize = (BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3; for (i = 0; i < blocksize / 4; i++) *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); /* buffer read end */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE); time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) return sh_mmcif_error_manage(host); host->wait_int = 0; return 0; } static int sh_mmcif_multi_read(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 blocksize, i, j, sec, *p; blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET); for (j = 0; j < data->sg_len; j++) { p = sg_virt(data->sg); host->wait_int = 0; for (sec = 0; sec < data->sg->length / blocksize; sec++) { sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); /* buf read enable */ time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) return sh_mmcif_error_manage(host); host->wait_int = 0; for (i = 0; i < blocksize / 4; i++) *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); } if (j < data->sg_len - 1) data->sg++; } return 0; } static int sh_mmcif_single_write(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 blocksize, i, *p = sg_virt(data->sg); host->wait_int = 0; sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); /* buf write enable */ time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) return sh_mmcif_error_manage(host); host->wait_int = 0; blocksize = (BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3; for (i = 0; i < blocksize / 4; i++) sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); /* buffer write end */ sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE); time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) return sh_mmcif_error_manage(host); host->wait_int = 0; return 0; } static int sh_mmcif_multi_write(struct sh_mmcif_host *host, struct mmc_request *mrq) { struct mmc_data *data = mrq->data; long time; u32 i, sec, j, blocksize, *p; blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET); for (j = 0; j < data->sg_len; j++) { p = sg_virt(data->sg); host->wait_int = 0; for (sec = 0; sec < data->sg->length / blocksize; sec++) { sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); /* buf write enable*/ time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) return sh_mmcif_error_manage(host); host->wait_int = 0; for (i = 0; i < blocksize / 4; i++) sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); } if (j < data->sg_len - 1) data->sg++; } return 0; } static void sh_mmcif_get_response(struct sh_mmcif_host *host, struct mmc_command *cmd) { if (cmd->flags & MMC_RSP_136) { cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP3); cmd->resp[1] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP2); cmd->resp[2] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP1); cmd->resp[3] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0); } else cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0); } static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host, struct mmc_command *cmd) { cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP_CMD12); } static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host, struct mmc_request *mrq, struct mmc_command *cmd, u32 opc) { u32 tmp = 0; /* Response Type check */ switch (mmc_resp_type(cmd)) { case MMC_RSP_NONE: tmp |= CMD_SET_RTYP_NO; break; case MMC_RSP_R1: case MMC_RSP_R1B: case MMC_RSP_R3: tmp |= CMD_SET_RTYP_6B; break; case MMC_RSP_R2: tmp |= CMD_SET_RTYP_17B; break; default: pr_err(DRIVER_NAME": Not support type response.\n"); break; } switch (opc) { /* RBSY */ case MMC_SWITCH: case MMC_STOP_TRANSMISSION: case MMC_SET_WRITE_PROT: case MMC_CLR_WRITE_PROT: case MMC_ERASE: case MMC_GEN_CMD: tmp |= CMD_SET_RBSY; break; } /* WDAT / DATW */ if (host->data) { tmp |= CMD_SET_WDAT; switch (host->bus_width) { case MMC_BUS_WIDTH_1: tmp |= CMD_SET_DATW_1; break; case MMC_BUS_WIDTH_4: tmp |= CMD_SET_DATW_4; break; case MMC_BUS_WIDTH_8: tmp |= CMD_SET_DATW_8; break; default: pr_err(DRIVER_NAME": Not support bus width.\n"); break; } } /* DWEN */ if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) tmp |= CMD_SET_DWEN; /* CMLTE/CMD12EN */ if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) { tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN; sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET, mrq->data->blocks << 16); } /* RIDXC[1:0] check bits */ if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID || opc == MMC_SEND_CSD || opc == MMC_SEND_CID) tmp |= CMD_SET_RIDXC_BITS; /* RCRC7C[1:0] check bits */ if (opc == MMC_SEND_OP_COND) tmp |= CMD_SET_CRC7C_BITS; /* RCRC7C[1:0] internal CRC7 */ if (opc == MMC_ALL_SEND_CID || opc == MMC_SEND_CSD || opc == MMC_SEND_CID) tmp |= CMD_SET_CRC7C_INTERNAL; return opc = ((opc << 24) | tmp); } static u32 sh_mmcif_data_trans(struct sh_mmcif_host *host, struct mmc_request *mrq, u32 opc) { u32 ret; switch (opc) { case MMC_READ_MULTIPLE_BLOCK: ret = sh_mmcif_multi_read(host, mrq); break; case MMC_WRITE_MULTIPLE_BLOCK: ret = sh_mmcif_multi_write(host, mrq); break; case MMC_WRITE_BLOCK: ret = sh_mmcif_single_write(host, mrq); break; case MMC_READ_SINGLE_BLOCK: case MMC_SEND_EXT_CSD: ret = sh_mmcif_single_read(host, mrq); break; default: pr_err(DRIVER_NAME": NOT SUPPORT CMD = d'%08d\n", opc); ret = -EINVAL; break; } return ret; } static void sh_mmcif_start_cmd(struct sh_mmcif_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { long time; int ret = 0, mask = 0; u32 opc = cmd->opcode; host->cmd = cmd; switch (opc) { /* respons busy check */ case MMC_SWITCH: case MMC_STOP_TRANSMISSION: case MMC_SET_WRITE_PROT: case MMC_CLR_WRITE_PROT: case MMC_ERASE: case MMC_GEN_CMD: mask = MASK_MRBSYE; break; default: mask = MASK_MCRSPE; break; } mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR | MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR | MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO | MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO; if (host->data) { sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0); sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, mrq->data->blksz); } opc = sh_mmcif_set_cmd(host, mrq, cmd, opc); sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0); sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask); /* set arg */ sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg); host->wait_int = 0; /* set cmd */ sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc); time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && time == 0) { cmd->error = sh_mmcif_error_manage(host); return; } if (host->sd_error) { switch (cmd->opcode) { case MMC_ALL_SEND_CID: case MMC_SELECT_CARD: case MMC_APP_CMD: cmd->error = -ETIMEDOUT; break; default: pr_debug("%s: Cmd(d'%d) err\n", DRIVER_NAME, cmd->opcode); cmd->error = sh_mmcif_error_manage(host); break; } host->sd_error = 0; host->wait_int = 0; return; } if (!(cmd->flags & MMC_RSP_PRESENT)) { cmd->error = ret; host->wait_int = 0; return; } if (host->wait_int == 1) { sh_mmcif_get_response(host, cmd); host->wait_int = 0; } if (host->data) { ret = sh_mmcif_data_trans(host, mrq, cmd->opcode); if (ret < 0) mrq->data->bytes_xfered = 0; else mrq->data->bytes_xfered = mrq->data->blocks * mrq->data->blksz; } cmd->error = ret; } static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host, struct mmc_request *mrq, struct mmc_command *cmd) { long time; if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK) sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE); else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK) sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE); else { pr_err(DRIVER_NAME": not support stop cmd\n"); cmd->error = sh_mmcif_error_manage(host); return; } time = wait_event_interruptible_timeout(host->intr_wait, host->wait_int == 1 || host->sd_error == 1, host->timeout); if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) { cmd->error = sh_mmcif_error_manage(host); return; } sh_mmcif_get_cmd12response(host, cmd); host->wait_int = 0; cmd->error = 0; } static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq) { struct sh_mmcif_host *host = mmc_priv(mmc); switch (mrq->cmd->opcode) { /* MMCIF does not support SD/SDIO command */ case SD_IO_SEND_OP_COND: case MMC_APP_CMD: mrq->cmd->error = -ETIMEDOUT; mmc_request_done(mmc, mrq); return; case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */ if (!mrq->data) { /* send_if_cond cmd (not support) */ mrq->cmd->error = -ETIMEDOUT; mmc_request_done(mmc, mrq); return; } break; default: break; } host->data = mrq->data; sh_mmcif_start_cmd(host, mrq, mrq->cmd); host->data = NULL; if (mrq->cmd->error != 0) { mmc_request_done(mmc, mrq); return; } if (mrq->stop) sh_mmcif_stop_cmd(host, mrq, mrq->stop); mmc_request_done(mmc, mrq); } static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct sh_mmcif_host *host = mmc_priv(mmc); struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; if (ios->power_mode == MMC_POWER_OFF) { /* clock stop */ sh_mmcif_clock_control(host, 0); if (p->down_pwr) p->down_pwr(host->pd); return; } else if (ios->power_mode == MMC_POWER_UP) { if (p->set_pwr) p->set_pwr(host->pd, ios->power_mode); } if (ios->clock) sh_mmcif_clock_control(host, ios->clock); host->bus_width = ios->bus_width; } static int sh_mmcif_get_cd(struct mmc_host *mmc) { struct sh_mmcif_host *host = mmc_priv(mmc); struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; if (!p->get_cd) return -ENOSYS; else return p->get_cd(host->pd); } static struct mmc_host_ops sh_mmcif_ops = { .request = sh_mmcif_request, .set_ios = sh_mmcif_set_ios, .get_cd = sh_mmcif_get_cd, }; static void sh_mmcif_detect(struct mmc_host *mmc) { mmc_detect_change(mmc, 0); } static irqreturn_t sh_mmcif_intr(int irq, void *dev_id) { struct sh_mmcif_host *host = dev_id; u32 state = 0; int err = 0; state = sh_mmcif_readl(host->addr, MMCIF_CE_INT); if (state & INT_RBSYE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~(INT_RBSYE | INT_CRSPE)); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE); } else if (state & INT_CRSPE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_CRSPE); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE); } else if (state & INT_BUFREN) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFREN); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); } else if (state & INT_BUFWEN) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFWEN); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); } else if (state & INT_CMD12DRE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~(INT_CMD12DRE | INT_CMD12RBE | INT_CMD12CRE | INT_BUFRE)); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE); } else if (state & INT_BUFRE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE); } else if (state & INT_DTRANE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_DTRANE); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE); } else if (state & INT_CMD12RBE) { sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~(INT_CMD12RBE | INT_CMD12CRE)); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE); } else if (state & INT_ERR_STS) { /* err interrupts */ sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state); err = 1; } else { pr_debug("%s: Not support int\n", DRIVER_NAME); sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state); err = 1; } if (err) { host->sd_error = 1; pr_debug("%s: int err state = %08x\n", DRIVER_NAME, state); } host->wait_int = 1; wake_up(&host->intr_wait); return IRQ_HANDLED; } static int __devinit sh_mmcif_probe(struct platform_device *pdev) { int ret = 0, irq[2]; struct mmc_host *mmc; struct sh_mmcif_host *host = NULL; struct sh_mmcif_plat_data *pd = NULL; struct resource *res; void __iomem *reg; char clk_name[8]; irq[0] = platform_get_irq(pdev, 0); irq[1] = platform_get_irq(pdev, 1); if (irq[0] < 0 || irq[1] < 0) { pr_err(DRIVER_NAME": Get irq error\n"); return -ENXIO; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "platform_get_resource error.\n"); return -ENXIO; } reg = ioremap(res->start, resource_size(res)); if (!reg) { dev_err(&pdev->dev, "ioremap error.\n"); return -ENOMEM; } pd = (struct sh_mmcif_plat_data *)(pdev->dev.platform_data); if (!pd) { dev_err(&pdev->dev, "sh_mmcif plat data error.\n"); ret = -ENXIO; goto clean_up; } mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev); if (!mmc) { ret = -ENOMEM; goto clean_up; } host = mmc_priv(mmc); host->mmc = mmc; host->addr = reg; host->timeout = 1000; snprintf(clk_name, sizeof(clk_name), "mmc%d", pdev->id); host->hclk = clk_get(&pdev->dev, clk_name); if (IS_ERR(host->hclk)) { dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); ret = PTR_ERR(host->hclk); goto clean_up1; } clk_enable(host->hclk); host->clk = clk_get_rate(host->hclk); host->pd = pdev; init_waitqueue_head(&host->intr_wait); mmc->ops = &sh_mmcif_ops; mmc->f_max = host->clk; /* close to 400KHz */ if (mmc->f_max < 51200000) mmc->f_min = mmc->f_max / 128; else if (mmc->f_max < 102400000) mmc->f_min = mmc->f_max / 256; else mmc->f_min = mmc->f_max / 512; if (pd->ocr) mmc->ocr_avail = pd->ocr; mmc->caps = MMC_CAP_MMC_HIGHSPEED; if (pd->caps) mmc->caps |= pd->caps; mmc->max_segs = 128; mmc->max_blk_size = 512; mmc->max_blk_count = 65535; mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; mmc->max_seg_size = mmc->max_req_size; sh_mmcif_sync_reset(host); platform_set_drvdata(pdev, host); mmc_add_host(mmc); ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host); if (ret) { pr_err(DRIVER_NAME": request_irq error (sh_mmc:error)\n"); goto clean_up2; } ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host); if (ret) { free_irq(irq[0], host); pr_err(DRIVER_NAME": request_irq error (sh_mmc:int)\n"); goto clean_up2; } sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); sh_mmcif_detect(host->mmc); pr_info("%s: driver version %s\n", DRIVER_NAME, DRIVER_VERSION); pr_debug("%s: chip ver H'%04x\n", DRIVER_NAME, sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff); return ret; clean_up2: clk_disable(host->hclk); clean_up1: mmc_free_host(mmc); clean_up: if (reg) iounmap(reg); return ret; } static int __devexit sh_mmcif_remove(struct platform_device *pdev) { struct sh_mmcif_host *host = platform_get_drvdata(pdev); int irq[2]; sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); irq[0] = platform_get_irq(pdev, 0); irq[1] = platform_get_irq(pdev, 1); if (host->addr) iounmap(host->addr); platform_set_drvdata(pdev, NULL); mmc_remove_host(host->mmc); free_irq(irq[0], host); free_irq(irq[1], host); clk_disable(host->hclk); mmc_free_host(host->mmc); return 0; } static struct platform_driver sh_mmcif_driver = { .probe = sh_mmcif_probe, .remove = sh_mmcif_remove, .driver = { .name = DRIVER_NAME, }, }; static int __init sh_mmcif_init(void) { return platform_driver_register(&sh_mmcif_driver); } static void __exit sh_mmcif_exit(void) { platform_driver_unregister(&sh_mmcif_driver); } module_init(sh_mmcif_init); module_exit(sh_mmcif_exit); MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS(DRIVER_NAME); MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>"); |