1 /* 2 * linux/drivers/mmc/host/wbsd.c - Winbond W83L51xD SD/MMC driver 3 * 4 * Copyright (C) 2004-2007 Pierre Ossman, All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or (at 9 * your option) any later version. 10 * 11 * 12 * Warning! 13 * 14 * Changes to the FIFO system should be done with extreme care since 15 * the hardware is full of bugs related to the FIFO. Known issues are: 16 * 17 * - FIFO size field in FSR is always zero. 18 * 19 * - FIFO interrupts tend not to work as they should. Interrupts are 20 * triggered only for full/empty events, not for threshold values. 21 * 22 * - On APIC systems the FIFO empty interrupt is sometimes lost. 23 */ 24 25 #include <linux/module.h> 26 #include <linux/moduleparam.h> 27 #include <linux/init.h> 28 #include <linux/ioport.h> 29 #include <linux/platform_device.h> 30 #include <linux/interrupt.h> 31 #include <linux/dma-mapping.h> 32 #include <linux/delay.h> 33 #include <linux/pnp.h> 34 #include <linux/highmem.h> 35 #include <linux/mmc/host.h> 36 37 #include <asm/io.h> 38 #include <asm/dma.h> 39 #include <asm/scatterlist.h> 40 41 #include "wbsd.h" 42 43 #define DRIVER_NAME "wbsd" 44 45 #define DBG(x...) \ 46 pr_debug(DRIVER_NAME ": " x) 47 #define DBGF(f, x...) \ 48 pr_debug(DRIVER_NAME " [%s()]: " f, __func__ , ##x) 49 50 /* 51 * Device resources 52 */ 53 54 #ifdef CONFIG_PNP 55 56 static const struct pnp_device_id pnp_dev_table[] = { 57 { "WEC0517", 0 }, 58 { "WEC0518", 0 }, 59 { "", 0 }, 60 }; 61 62 MODULE_DEVICE_TABLE(pnp, pnp_dev_table); 63 64 #endif /* CONFIG_PNP */ 65 66 static const int config_ports[] = { 0x2E, 0x4E }; 67 static const int unlock_codes[] = { 0x83, 0x87 }; 68 69 static const int valid_ids[] = { 70 0x7112, 71 }; 72 73 #ifdef CONFIG_PNP 74 static unsigned int nopnp = 0; 75 #else 76 static const unsigned int nopnp = 1; 77 #endif 78 static unsigned int io = 0x248; 79 static unsigned int irq = 6; 80 static int dma = 2; 81 82 /* 83 * Basic functions 84 */ 85 86 static inline void wbsd_unlock_config(struct wbsd_host *host) 87 { 88 BUG_ON(host->config == 0); 89 90 outb(host->unlock_code, host->config); 91 outb(host->unlock_code, host->config); 92 } 93 94 static inline void wbsd_lock_config(struct wbsd_host *host) 95 { 96 BUG_ON(host->config == 0); 97 98 outb(LOCK_CODE, host->config); 99 } 100 101 static inline void wbsd_write_config(struct wbsd_host *host, u8 reg, u8 value) 102 { 103 BUG_ON(host->config == 0); 104 105 outb(reg, host->config); 106 outb(value, host->config + 1); 107 } 108 109 static inline u8 wbsd_read_config(struct wbsd_host *host, u8 reg) 110 { 111 BUG_ON(host->config == 0); 112 113 outb(reg, host->config); 114 return inb(host->config + 1); 115 } 116 117 static inline void wbsd_write_index(struct wbsd_host *host, u8 index, u8 value) 118 { 119 outb(index, host->base + WBSD_IDXR); 120 outb(value, host->base + WBSD_DATAR); 121 } 122 123 static inline u8 wbsd_read_index(struct wbsd_host *host, u8 index) 124 { 125 outb(index, host->base + WBSD_IDXR); 126 return inb(host->base + WBSD_DATAR); 127 } 128 129 /* 130 * Common routines 131 */ 132 133 static void wbsd_init_device(struct wbsd_host *host) 134 { 135 u8 setup, ier; 136 137 /* 138 * Reset chip (SD/MMC part) and fifo. 139 */ 140 setup = wbsd_read_index(host, WBSD_IDX_SETUP); 141 setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET; 142 wbsd_write_index(host, WBSD_IDX_SETUP, setup); 143 144 /* 145 * Set DAT3 to input 146 */ 147 setup &= ~WBSD_DAT3_H; 148 wbsd_write_index(host, WBSD_IDX_SETUP, setup); 149 host->flags &= ~WBSD_FIGNORE_DETECT; 150 151 /* 152 * Read back default clock. 153 */ 154 host->clk = wbsd_read_index(host, WBSD_IDX_CLK); 155 156 /* 157 * Power down port. 158 */ 159 outb(WBSD_POWER_N, host->base + WBSD_CSR); 160 161 /* 162 * Set maximum timeout. 163 */ 164 wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F); 165 166 /* 167 * Test for card presence 168 */ 169 if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT) 170 host->flags |= WBSD_FCARD_PRESENT; 171 else 172 host->flags &= ~WBSD_FCARD_PRESENT; 173 174 /* 175 * Enable interesting interrupts. 176 */ 177 ier = 0; 178 ier |= WBSD_EINT_CARD; 179 ier |= WBSD_EINT_FIFO_THRE; 180 ier |= WBSD_EINT_CRC; 181 ier |= WBSD_EINT_TIMEOUT; 182 ier |= WBSD_EINT_TC; 183 184 outb(ier, host->base + WBSD_EIR); 185 186 /* 187 * Clear interrupts. 188 */ 189 inb(host->base + WBSD_ISR); 190 } 191 192 static void wbsd_reset(struct wbsd_host *host) 193 { 194 u8 setup; 195 196 printk(KERN_ERR "%s: Resetting chip\n", mmc_hostname(host->mmc)); 197 198 /* 199 * Soft reset of chip (SD/MMC part). 200 */ 201 setup = wbsd_read_index(host, WBSD_IDX_SETUP); 202 setup |= WBSD_SOFT_RESET; 203 wbsd_write_index(host, WBSD_IDX_SETUP, setup); 204 } 205 206 static void wbsd_request_end(struct wbsd_host *host, struct mmc_request *mrq) 207 { 208 unsigned long dmaflags; 209 210 if (host->dma >= 0) { 211 /* 212 * Release ISA DMA controller. 213 */ 214 dmaflags = claim_dma_lock(); 215 disable_dma(host->dma); 216 clear_dma_ff(host->dma); 217 release_dma_lock(dmaflags); 218 219 /* 220 * Disable DMA on host. 221 */ 222 wbsd_write_index(host, WBSD_IDX_DMA, 0); 223 } 224 225 host->mrq = NULL; 226 227 /* 228 * MMC layer might call back into the driver so first unlock. 229 */ 230 spin_unlock(&host->lock); 231 mmc_request_done(host->mmc, mrq); 232 spin_lock(&host->lock); 233 } 234 235 /* 236 * Scatter/gather functions 237 */ 238 239 static inline void wbsd_init_sg(struct wbsd_host *host, struct mmc_data *data) 240 { 241 /* 242 * Get info. about SG list from data structure. 243 */ 244 host->cur_sg = data->sg; 245 host->num_sg = data->sg_len; 246 247 host->offset = 0; 248 host->remain = host->cur_sg->length; 249 } 250 251 static inline int wbsd_next_sg(struct wbsd_host *host) 252 { 253 /* 254 * Skip to next SG entry. 255 */ 256 host->cur_sg++; 257 host->num_sg--; 258 259 /* 260 * Any entries left? 261 */ 262 if (host->num_sg > 0) { 263 host->offset = 0; 264 host->remain = host->cur_sg->length; 265 } 266 267 return host->num_sg; 268 } 269 270 static inline char *wbsd_sg_to_buffer(struct wbsd_host *host) 271 { 272 return page_address(host->cur_sg->page) + host->cur_sg->offset; 273 } 274 275 static inline void wbsd_sg_to_dma(struct wbsd_host *host, struct mmc_data *data) 276 { 277 unsigned int len, i; 278 struct scatterlist *sg; 279 char *dmabuf = host->dma_buffer; 280 char *sgbuf; 281 282 sg = data->sg; 283 len = data->sg_len; 284 285 for (i = 0; i < len; i++) { 286 sgbuf = page_address(sg[i].page) + sg[i].offset; 287 memcpy(dmabuf, sgbuf, sg[i].length); 288 dmabuf += sg[i].length; 289 } 290 } 291 292 static inline void wbsd_dma_to_sg(struct wbsd_host *host, struct mmc_data *data) 293 { 294 unsigned int len, i; 295 struct scatterlist *sg; 296 char *dmabuf = host->dma_buffer; 297 char *sgbuf; 298 299 sg = data->sg; 300 len = data->sg_len; 301 302 for (i = 0; i < len; i++) { 303 sgbuf = page_address(sg[i].page) + sg[i].offset; 304 memcpy(sgbuf, dmabuf, sg[i].length); 305 dmabuf += sg[i].length; 306 } 307 } 308 309 /* 310 * Command handling 311 */ 312 313 static inline void wbsd_get_short_reply(struct wbsd_host *host, 314 struct mmc_command *cmd) 315 { 316 /* 317 * Correct response type? 318 */ 319 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) { 320 cmd->error = -EILSEQ; 321 return; 322 } 323 324 cmd->resp[0] = wbsd_read_index(host, WBSD_IDX_RESP12) << 24; 325 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP13) << 16; 326 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP14) << 8; 327 cmd->resp[0] |= wbsd_read_index(host, WBSD_IDX_RESP15) << 0; 328 cmd->resp[1] = wbsd_read_index(host, WBSD_IDX_RESP16) << 24; 329 } 330 331 static inline void wbsd_get_long_reply(struct wbsd_host *host, 332 struct mmc_command *cmd) 333 { 334 int i; 335 336 /* 337 * Correct response type? 338 */ 339 if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) { 340 cmd->error = -EILSEQ; 341 return; 342 } 343 344 for (i = 0; i < 4; i++) { 345 cmd->resp[i] = 346 wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24; 347 cmd->resp[i] |= 348 wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16; 349 cmd->resp[i] |= 350 wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8; 351 cmd->resp[i] |= 352 wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0; 353 } 354 } 355 356 static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd) 357 { 358 int i; 359 u8 status, isr; 360 361 /* 362 * Clear accumulated ISR. The interrupt routine 363 * will fill this one with events that occur during 364 * transfer. 365 */ 366 host->isr = 0; 367 368 /* 369 * Send the command (CRC calculated by host). 370 */ 371 outb(cmd->opcode, host->base + WBSD_CMDR); 372 for (i = 3; i >= 0; i--) 373 outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR); 374 375 cmd->error = 0; 376 377 /* 378 * Wait for the request to complete. 379 */ 380 do { 381 status = wbsd_read_index(host, WBSD_IDX_STATUS); 382 } while (status & WBSD_CARDTRAFFIC); 383 384 /* 385 * Do we expect a reply? 386 */ 387 if (cmd->flags & MMC_RSP_PRESENT) { 388 /* 389 * Read back status. 390 */ 391 isr = host->isr; 392 393 /* Card removed? */ 394 if (isr & WBSD_INT_CARD) 395 cmd->error = -ENOMEDIUM; 396 /* Timeout? */ 397 else if (isr & WBSD_INT_TIMEOUT) 398 cmd->error = -ETIMEDOUT; 399 /* CRC? */ 400 else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC)) 401 cmd->error = -EILSEQ; 402 /* All ok */ 403 else { 404 if (cmd->flags & MMC_RSP_136) 405 wbsd_get_long_reply(host, cmd); 406 else 407 wbsd_get_short_reply(host, cmd); 408 } 409 } 410 } 411 412 /* 413 * Data functions 414 */ 415 416 static void wbsd_empty_fifo(struct wbsd_host *host) 417 { 418 struct mmc_data *data = host->mrq->cmd->data; 419 char *buffer; 420 int i, fsr, fifo; 421 422 /* 423 * Handle excessive data. 424 */ 425 if (host->num_sg == 0) 426 return; 427 428 buffer = wbsd_sg_to_buffer(host) + host->offset; 429 430 /* 431 * Drain the fifo. This has a tendency to loop longer 432 * than the FIFO length (usually one block). 433 */ 434 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) { 435 /* 436 * The size field in the FSR is broken so we have to 437 * do some guessing. 438 */ 439 if (fsr & WBSD_FIFO_FULL) 440 fifo = 16; 441 else if (fsr & WBSD_FIFO_FUTHRE) 442 fifo = 8; 443 else 444 fifo = 1; 445 446 for (i = 0; i < fifo; i++) { 447 *buffer = inb(host->base + WBSD_DFR); 448 buffer++; 449 host->offset++; 450 host->remain--; 451 452 data->bytes_xfered++; 453 454 /* 455 * End of scatter list entry? 456 */ 457 if (host->remain == 0) { 458 /* 459 * Get next entry. Check if last. 460 */ 461 if (!wbsd_next_sg(host)) 462 return; 463 464 buffer = wbsd_sg_to_buffer(host); 465 } 466 } 467 } 468 469 /* 470 * This is a very dirty hack to solve a 471 * hardware problem. The chip doesn't trigger 472 * FIFO threshold interrupts properly. 473 */ 474 if ((data->blocks * data->blksz - data->bytes_xfered) < 16) 475 tasklet_schedule(&host->fifo_tasklet); 476 } 477 478 static void wbsd_fill_fifo(struct wbsd_host *host) 479 { 480 struct mmc_data *data = host->mrq->cmd->data; 481 char *buffer; 482 int i, fsr, fifo; 483 484 /* 485 * Check that we aren't being called after the 486 * entire buffer has been transfered. 487 */ 488 if (host->num_sg == 0) 489 return; 490 491 buffer = wbsd_sg_to_buffer(host) + host->offset; 492 493 /* 494 * Fill the fifo. This has a tendency to loop longer 495 * than the FIFO length (usually one block). 496 */ 497 while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) { 498 /* 499 * The size field in the FSR is broken so we have to 500 * do some guessing. 501 */ 502 if (fsr & WBSD_FIFO_EMPTY) 503 fifo = 0; 504 else if (fsr & WBSD_FIFO_EMTHRE) 505 fifo = 8; 506 else 507 fifo = 15; 508 509 for (i = 16; i > fifo; i--) { 510 outb(*buffer, host->base + WBSD_DFR); 511 buffer++; 512 host->offset++; 513 host->remain--; 514 515 data->bytes_xfered++; 516 517 /* 518 * End of scatter list entry? 519 */ 520 if (host->remain == 0) { 521 /* 522 * Get next entry. Check if last. 523 */ 524 if (!wbsd_next_sg(host)) 525 return; 526 527 buffer = wbsd_sg_to_buffer(host); 528 } 529 } 530 } 531 532 /* 533 * The controller stops sending interrupts for 534 * 'FIFO empty' under certain conditions. So we 535 * need to be a bit more pro-active. 536 */ 537 tasklet_schedule(&host->fifo_tasklet); 538 } 539 540 static void wbsd_prepare_data(struct wbsd_host *host, struct mmc_data *data) 541 { 542 u16 blksize; 543 u8 setup; 544 unsigned long dmaflags; 545 unsigned int size; 546 547 /* 548 * Calculate size. 549 */ 550 size = data->blocks * data->blksz; 551 552 /* 553 * Check timeout values for overflow. 554 * (Yes, some cards cause this value to overflow). 555 */ 556 if (data->timeout_ns > 127000000) 557 wbsd_write_index(host, WBSD_IDX_TAAC, 127); 558 else { 559 wbsd_write_index(host, WBSD_IDX_TAAC, 560 data->timeout_ns / 1000000); 561 } 562 563 if (data->timeout_clks > 255) 564 wbsd_write_index(host, WBSD_IDX_NSAC, 255); 565 else 566 wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks); 567 568 /* 569 * Inform the chip of how large blocks will be 570 * sent. It needs this to determine when to 571 * calculate CRC. 572 * 573 * Space for CRC must be included in the size. 574 * Two bytes are needed for each data line. 575 */ 576 if (host->bus_width == MMC_BUS_WIDTH_1) { 577 blksize = data->blksz + 2; 578 579 wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0); 580 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); 581 } else if (host->bus_width == MMC_BUS_WIDTH_4) { 582 blksize = data->blksz + 2 * 4; 583 584 wbsd_write_index(host, WBSD_IDX_PBSMSB, 585 ((blksize >> 4) & 0xF0) | WBSD_DATA_WIDTH); 586 wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); 587 } else { 588 data->error = -EINVAL; 589 return; 590 } 591 592 /* 593 * Clear the FIFO. This is needed even for DMA 594 * transfers since the chip still uses the FIFO 595 * internally. 596 */ 597 setup = wbsd_read_index(host, WBSD_IDX_SETUP); 598 setup |= WBSD_FIFO_RESET; 599 wbsd_write_index(host, WBSD_IDX_SETUP, setup); 600 601 /* 602 * DMA transfer? 603 */ 604 if (host->dma >= 0) { 605 /* 606 * The buffer for DMA is only 64 kB. 607 */ 608 BUG_ON(size > 0x10000); 609 if (size > 0x10000) { 610 data->error = -EINVAL; 611 return; 612 } 613 614 /* 615 * Transfer data from the SG list to 616 * the DMA buffer. 617 */ 618 if (data->flags & MMC_DATA_WRITE) 619 wbsd_sg_to_dma(host, data); 620 621 /* 622 * Initialise the ISA DMA controller. 623 */ 624 dmaflags = claim_dma_lock(); 625 disable_dma(host->dma); 626 clear_dma_ff(host->dma); 627 if (data->flags & MMC_DATA_READ) 628 set_dma_mode(host->dma, DMA_MODE_READ & ~0x40); 629 else 630 set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40); 631 set_dma_addr(host->dma, host->dma_addr); 632 set_dma_count(host->dma, size); 633 634 enable_dma(host->dma); 635 release_dma_lock(dmaflags); 636 637 /* 638 * Enable DMA on the host. 639 */ 640 wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE); 641 } else { 642 /* 643 * This flag is used to keep printk 644 * output to a minimum. 645 */ 646 host->firsterr = 1; 647 648 /* 649 * Initialise the SG list. 650 */ 651 wbsd_init_sg(host, data); 652 653 /* 654 * Turn off DMA. 655 */ 656 wbsd_write_index(host, WBSD_IDX_DMA, 0); 657 658 /* 659 * Set up FIFO threshold levels (and fill 660 * buffer if doing a write). 661 */ 662 if (data->flags & MMC_DATA_READ) { 663 wbsd_write_index(host, WBSD_IDX_FIFOEN, 664 WBSD_FIFOEN_FULL | 8); 665 } else { 666 wbsd_write_index(host, WBSD_IDX_FIFOEN, 667 WBSD_FIFOEN_EMPTY | 8); 668 wbsd_fill_fifo(host); 669 } 670 } 671 672 data->error = 0; 673 } 674 675 static void wbsd_finish_data(struct wbsd_host *host, struct mmc_data *data) 676 { 677 unsigned long dmaflags; 678 int count; 679 u8 status; 680 681 WARN_ON(host->mrq == NULL); 682 683 /* 684 * Send a stop command if needed. 685 */ 686 if (data->stop) 687 wbsd_send_command(host, data->stop); 688 689 /* 690 * Wait for the controller to leave data 691 * transfer state. 692 */ 693 do { 694 status = wbsd_read_index(host, WBSD_IDX_STATUS); 695 } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE)); 696 697 /* 698 * DMA transfer? 699 */ 700 if (host->dma >= 0) { 701 /* 702 * Disable DMA on the host. 703 */ 704 wbsd_write_index(host, WBSD_IDX_DMA, 0); 705 706 /* 707 * Turn of ISA DMA controller. 708 */ 709 dmaflags = claim_dma_lock(); 710 disable_dma(host->dma); 711 clear_dma_ff(host->dma); 712 count = get_dma_residue(host->dma); 713 release_dma_lock(dmaflags); 714 715 data->bytes_xfered = host->mrq->data->blocks * 716 host->mrq->data->blksz - count; 717 data->bytes_xfered -= data->bytes_xfered % data->blksz; 718 719 /* 720 * Any leftover data? 721 */ 722 if (count) { 723 printk(KERN_ERR "%s: Incomplete DMA transfer. " 724 "%d bytes left.\n", 725 mmc_hostname(host->mmc), count); 726 727 if (!data->error) 728 data->error = -EIO; 729 } else { 730 /* 731 * Transfer data from DMA buffer to 732 * SG list. 733 */ 734 if (data->flags & MMC_DATA_READ) 735 wbsd_dma_to_sg(host, data); 736 } 737 738 if (data->error) { 739 if (data->bytes_xfered) 740 data->bytes_xfered -= data->blksz; 741 } 742 } 743 744 wbsd_request_end(host, host->mrq); 745 } 746 747 /*****************************************************************************\ 748 * * 749 * MMC layer callbacks * 750 * * 751 \*****************************************************************************/ 752 753 static void wbsd_request(struct mmc_host *mmc, struct mmc_request *mrq) 754 { 755 struct wbsd_host *host = mmc_priv(mmc); 756 struct mmc_command *cmd; 757 758 /* 759 * Disable tasklets to avoid a deadlock. 760 */ 761 spin_lock_bh(&host->lock); 762 763 BUG_ON(host->mrq != NULL); 764 765 cmd = mrq->cmd; 766 767 host->mrq = mrq; 768 769 /* 770 * Check that there is actually a card in the slot. 771 */ 772 if (!(host->flags & WBSD_FCARD_PRESENT)) { 773 cmd->error = -ENOMEDIUM; 774 goto done; 775 } 776 777 if (cmd->data) { 778 /* 779 * The hardware is so delightfully stupid that it has a list 780 * of "data" commands. If a command isn't on this list, it'll 781 * just go back to the idle state and won't send any data 782 * interrupts. 783 */ 784 switch (cmd->opcode) { 785 case 11: 786 case 17: 787 case 18: 788 case 20: 789 case 24: 790 case 25: 791 case 26: 792 case 27: 793 case 30: 794 case 42: 795 case 56: 796 break; 797 798 /* ACMDs. We don't keep track of state, so we just treat them 799 * like any other command. */ 800 case 51: 801 break; 802 803 default: 804 #ifdef CONFIG_MMC_DEBUG 805 printk(KERN_WARNING "%s: Data command %d is not " 806 "supported by this controller.\n", 807 mmc_hostname(host->mmc), cmd->opcode); 808 #endif 809 cmd->error = -EINVAL; 810 811 goto done; 812 }; 813 } 814 815 /* 816 * Does the request include data? 817 */ 818 if (cmd->data) { 819 wbsd_prepare_data(host, cmd->data); 820 821 if (cmd->data->error) 822 goto done; 823 } 824 825 wbsd_send_command(host, cmd); 826 827 /* 828 * If this is a data transfer the request 829 * will be finished after the data has 830 * transfered. 831 */ 832 if (cmd->data && !cmd->error) { 833 /* 834 * Dirty fix for hardware bug. 835 */ 836 if (host->dma == -1) 837 tasklet_schedule(&host->fifo_tasklet); 838 839 spin_unlock_bh(&host->lock); 840 841 return; 842 } 843 844 done: 845 wbsd_request_end(host, mrq); 846 847 spin_unlock_bh(&host->lock); 848 } 849 850 static void wbsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 851 { 852 struct wbsd_host *host = mmc_priv(mmc); 853 u8 clk, setup, pwr; 854 855 spin_lock_bh(&host->lock); 856 857 /* 858 * Reset the chip on each power off. 859 * Should clear out any weird states. 860 */ 861 if (ios->power_mode == MMC_POWER_OFF) 862 wbsd_init_device(host); 863 864 if (ios->clock >= 24000000) 865 clk = WBSD_CLK_24M; 866 else if (ios->clock >= 16000000) 867 clk = WBSD_CLK_16M; 868 else if (ios->clock >= 12000000) 869 clk = WBSD_CLK_12M; 870 else 871 clk = WBSD_CLK_375K; 872 873 /* 874 * Only write to the clock register when 875 * there is an actual change. 876 */ 877 if (clk != host->clk) { 878 wbsd_write_index(host, WBSD_IDX_CLK, clk); 879 host->clk = clk; 880 } 881 882 /* 883 * Power up card. 884 */ 885 if (ios->power_mode != MMC_POWER_OFF) { 886 pwr = inb(host->base + WBSD_CSR); 887 pwr &= ~WBSD_POWER_N; 888 outb(pwr, host->base + WBSD_CSR); 889 } 890 891 /* 892 * MMC cards need to have pin 1 high during init. 893 * It wreaks havoc with the card detection though so 894 * that needs to be disabled. 895 */ 896 setup = wbsd_read_index(host, WBSD_IDX_SETUP); 897 if (ios->chip_select == MMC_CS_HIGH) { 898 BUG_ON(ios->bus_width != MMC_BUS_WIDTH_1); 899 setup |= WBSD_DAT3_H; 900 host->flags |= WBSD_FIGNORE_DETECT; 901 } else { 902 if (setup & WBSD_DAT3_H) { 903 setup &= ~WBSD_DAT3_H; 904 905 /* 906 * We cannot resume card detection immediatly 907 * because of capacitance and delays in the chip. 908 */ 909 mod_timer(&host->ignore_timer, jiffies + HZ / 100); 910 } 911 } 912 wbsd_write_index(host, WBSD_IDX_SETUP, setup); 913 914 /* 915 * Store bus width for later. Will be used when 916 * setting up the data transfer. 917 */ 918 host->bus_width = ios->bus_width; 919 920 spin_unlock_bh(&host->lock); 921 } 922 923 static int wbsd_get_ro(struct mmc_host *mmc) 924 { 925 struct wbsd_host *host = mmc_priv(mmc); 926 u8 csr; 927 928 spin_lock_bh(&host->lock); 929 930 csr = inb(host->base + WBSD_CSR); 931 csr |= WBSD_MSLED; 932 outb(csr, host->base + WBSD_CSR); 933 934 mdelay(1); 935 936 csr = inb(host->base + WBSD_CSR); 937 csr &= ~WBSD_MSLED; 938 outb(csr, host->base + WBSD_CSR); 939 940 spin_unlock_bh(&host->lock); 941 942 return csr & WBSD_WRPT; 943 } 944 945 static const struct mmc_host_ops wbsd_ops = { 946 .request = wbsd_request, 947 .set_ios = wbsd_set_ios, 948 .get_ro = wbsd_get_ro, 949 }; 950 951 /*****************************************************************************\ 952 * * 953 * Interrupt handling * 954 * * 955 \*****************************************************************************/ 956 957 /* 958 * Helper function to reset detection ignore 959 */ 960 961 static void wbsd_reset_ignore(unsigned long data) 962 { 963 struct wbsd_host *host = (struct wbsd_host *)data; 964 965 BUG_ON(host == NULL); 966 967 DBG("Resetting card detection ignore\n"); 968 969 spin_lock_bh(&host->lock); 970 971 host->flags &= ~WBSD_FIGNORE_DETECT; 972 973 /* 974 * Card status might have changed during the 975 * blackout. 976 */ 977 tasklet_schedule(&host->card_tasklet); 978 979 spin_unlock_bh(&host->lock); 980 } 981 982 /* 983 * Tasklets 984 */ 985 986 static inline struct mmc_data *wbsd_get_data(struct wbsd_host *host) 987 { 988 WARN_ON(!host->mrq); 989 if (!host->mrq) 990 return NULL; 991 992 WARN_ON(!host->mrq->cmd); 993 if (!host->mrq->cmd) 994 return NULL; 995 996 WARN_ON(!host->mrq->cmd->data); 997 if (!host->mrq->cmd->data) 998 return NULL; 999 1000 return host->mrq->cmd->data; 1001 } 1002 1003 static void wbsd_tasklet_card(unsigned long param) 1004 { 1005 struct wbsd_host *host = (struct wbsd_host *)param; 1006 u8 csr; 1007 int delay = -1; 1008 1009 spin_lock(&host->lock); 1010 1011 if (host->flags & WBSD_FIGNORE_DETECT) { 1012 spin_unlock(&host->lock); 1013 return; 1014 } 1015 1016 csr = inb(host->base + WBSD_CSR); 1017 WARN_ON(csr == 0xff); 1018 1019 if (csr & WBSD_CARDPRESENT) { 1020 if (!(host->flags & WBSD_FCARD_PRESENT)) { 1021 DBG("Card inserted\n"); 1022 host->flags |= WBSD_FCARD_PRESENT; 1023 1024 delay = 500; 1025 } 1026 } else if (host->flags & WBSD_FCARD_PRESENT) { 1027 DBG("Card removed\n"); 1028 host->flags &= ~WBSD_FCARD_PRESENT; 1029 1030 if (host->mrq) { 1031 printk(KERN_ERR "%s: Card removed during transfer!\n", 1032 mmc_hostname(host->mmc)); 1033 wbsd_reset(host); 1034 1035 host->mrq->cmd->error = -ENOMEDIUM; 1036 tasklet_schedule(&host->finish_tasklet); 1037 } 1038 1039 delay = 0; 1040 } 1041 1042 /* 1043 * Unlock first since we might get a call back. 1044 */ 1045 1046 spin_unlock(&host->lock); 1047 1048 if (delay != -1) 1049 mmc_detect_change(host->mmc, msecs_to_jiffies(delay)); 1050 } 1051 1052 static void wbsd_tasklet_fifo(unsigned long param) 1053 { 1054 struct wbsd_host *host = (struct wbsd_host *)param; 1055 struct mmc_data *data; 1056 1057 spin_lock(&host->lock); 1058 1059 if (!host->mrq) 1060 goto end; 1061 1062 data = wbsd_get_data(host); 1063 if (!data) 1064 goto end; 1065 1066 if (data->flags & MMC_DATA_WRITE) 1067 wbsd_fill_fifo(host); 1068 else 1069 wbsd_empty_fifo(host); 1070 1071 /* 1072 * Done? 1073 */ 1074 if (host->num_sg == 0) { 1075 wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); 1076 tasklet_schedule(&host->finish_tasklet); 1077 } 1078 1079 end: 1080 spin_unlock(&host->lock); 1081 } 1082 1083 static void wbsd_tasklet_crc(unsigned long param) 1084 { 1085 struct wbsd_host *host = (struct wbsd_host *)param; 1086 struct mmc_data *data; 1087 1088 spin_lock(&host->lock); 1089 1090 if (!host->mrq) 1091 goto end; 1092 1093 data = wbsd_get_data(host); 1094 if (!data) 1095 goto end; 1096 1097 DBGF("CRC error\n"); 1098 1099 data->error = -EILSEQ; 1100 1101 tasklet_schedule(&host->finish_tasklet); 1102 1103 end: 1104 spin_unlock(&host->lock); 1105 } 1106 1107 static void wbsd_tasklet_timeout(unsigned long param) 1108 { 1109 struct wbsd_host *host = (struct wbsd_host *)param; 1110 struct mmc_data *data; 1111 1112 spin_lock(&host->lock); 1113 1114 if (!host->mrq) 1115 goto end; 1116 1117 data = wbsd_get_data(host); 1118 if (!data) 1119 goto end; 1120 1121 DBGF("Timeout\n"); 1122 1123 data->error = -ETIMEDOUT; 1124 1125 tasklet_schedule(&host->finish_tasklet); 1126 1127 end: 1128 spin_unlock(&host->lock); 1129 } 1130 1131 static void wbsd_tasklet_finish(unsigned long param) 1132 { 1133 struct wbsd_host *host = (struct wbsd_host *)param; 1134 struct mmc_data *data; 1135 1136 spin_lock(&host->lock); 1137 1138 WARN_ON(!host->mrq); 1139 if (!host->mrq) 1140 goto end; 1141 1142 data = wbsd_get_data(host); 1143 if (!data) 1144 goto end; 1145 1146 wbsd_finish_data(host, data); 1147 1148 end: 1149 spin_unlock(&host->lock); 1150 } 1151 1152 /* 1153 * Interrupt handling 1154 */ 1155 1156 static irqreturn_t wbsd_irq(int irq, void *dev_id) 1157 { 1158 struct wbsd_host *host = dev_id; 1159 int isr; 1160 1161 isr = inb(host->base + WBSD_ISR); 1162 1163 /* 1164 * Was it actually our hardware that caused the interrupt? 1165 */ 1166 if (isr == 0xff || isr == 0x00) 1167 return IRQ_NONE; 1168 1169 host->isr |= isr; 1170 1171 /* 1172 * Schedule tasklets as needed. 1173 */ 1174 if (isr & WBSD_INT_CARD) 1175 tasklet_schedule(&host->card_tasklet); 1176 if (isr & WBSD_INT_FIFO_THRE) 1177 tasklet_schedule(&host->fifo_tasklet); 1178 if (isr & WBSD_INT_CRC) 1179 tasklet_hi_schedule(&host->crc_tasklet); 1180 if (isr & WBSD_INT_TIMEOUT) 1181 tasklet_hi_schedule(&host->timeout_tasklet); 1182 if (isr & WBSD_INT_TC) 1183 tasklet_schedule(&host->finish_tasklet); 1184 1185 return IRQ_HANDLED; 1186 } 1187 1188 /*****************************************************************************\ 1189 * * 1190 * Device initialisation and shutdown * 1191 * * 1192 \*****************************************************************************/ 1193 1194 /* 1195 * Allocate/free MMC structure. 1196 */ 1197 1198 static int __devinit wbsd_alloc_mmc(struct device *dev) 1199 { 1200 struct mmc_host *mmc; 1201 struct wbsd_host *host; 1202 1203 /* 1204 * Allocate MMC structure. 1205 */ 1206 mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev); 1207 if (!mmc) 1208 return -ENOMEM; 1209 1210 host = mmc_priv(mmc); 1211 host->mmc = mmc; 1212 1213 host->dma = -1; 1214 1215 /* 1216 * Set host parameters. 1217 */ 1218 mmc->ops = &wbsd_ops; 1219 mmc->f_min = 375000; 1220 mmc->f_max = 24000000; 1221 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1222 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE; 1223 1224 spin_lock_init(&host->lock); 1225 1226 /* 1227 * Set up timers 1228 */ 1229 init_timer(&host->ignore_timer); 1230 host->ignore_timer.data = (unsigned long)host; 1231 host->ignore_timer.function = wbsd_reset_ignore; 1232 1233 /* 1234 * Maximum number of segments. Worst case is one sector per segment 1235 * so this will be 64kB/512. 1236 */ 1237 mmc->max_hw_segs = 128; 1238 mmc->max_phys_segs = 128; 1239 1240 /* 1241 * Maximum request size. Also limited by 64KiB buffer. 1242 */ 1243 mmc->max_req_size = 65536; 1244 1245 /* 1246 * Maximum segment size. Could be one segment with the maximum number 1247 * of bytes. 1248 */ 1249 mmc->max_seg_size = mmc->max_req_size; 1250 1251 /* 1252 * Maximum block size. We have 12 bits (= 4095) but have to subtract 1253 * space for CRC. So the maximum is 4095 - 4*2 = 4087. 1254 */ 1255 mmc->max_blk_size = 4087; 1256 1257 /* 1258 * Maximum block count. There is no real limit so the maximum 1259 * request size will be the only restriction. 1260 */ 1261 mmc->max_blk_count = mmc->max_req_size; 1262 1263 dev_set_drvdata(dev, mmc); 1264 1265 return 0; 1266 } 1267 1268 static void wbsd_free_mmc(struct device *dev) 1269 { 1270 struct mmc_host *mmc; 1271 struct wbsd_host *host; 1272 1273 mmc = dev_get_drvdata(dev); 1274 if (!mmc) 1275 return; 1276 1277 host = mmc_priv(mmc); 1278 BUG_ON(host == NULL); 1279 1280 del_timer_sync(&host->ignore_timer); 1281 1282 mmc_free_host(mmc); 1283 1284 dev_set_drvdata(dev, NULL); 1285 } 1286 1287 /* 1288 * Scan for known chip id:s 1289 */ 1290 1291 static int __devinit wbsd_scan(struct wbsd_host *host) 1292 { 1293 int i, j, k; 1294 int id; 1295 1296 /* 1297 * Iterate through all ports, all codes to 1298 * find hardware that is in our known list. 1299 */ 1300 for (i = 0; i < ARRAY_SIZE(config_ports); i++) { 1301 if (!request_region(config_ports[i], 2, DRIVER_NAME)) 1302 continue; 1303 1304 for (j = 0; j < ARRAY_SIZE(unlock_codes); j++) { 1305 id = 0xFFFF; 1306 1307 host->config = config_ports[i]; 1308 host->unlock_code = unlock_codes[j]; 1309 1310 wbsd_unlock_config(host); 1311 1312 outb(WBSD_CONF_ID_HI, config_ports[i]); 1313 id = inb(config_ports[i] + 1) << 8; 1314 1315 outb(WBSD_CONF_ID_LO, config_ports[i]); 1316 id |= inb(config_ports[i] + 1); 1317 1318 wbsd_lock_config(host); 1319 1320 for (k = 0; k < ARRAY_SIZE(valid_ids); k++) { 1321 if (id == valid_ids[k]) { 1322 host->chip_id = id; 1323 1324 return 0; 1325 } 1326 } 1327 1328 if (id != 0xFFFF) { 1329 DBG("Unknown hardware (id %x) found at %x\n", 1330 id, config_ports[i]); 1331 } 1332 } 1333 1334 release_region(config_ports[i], 2); 1335 } 1336 1337 host->config = 0; 1338 host->unlock_code = 0; 1339 1340 return -ENODEV; 1341 } 1342 1343 /* 1344 * Allocate/free io port ranges 1345 */ 1346 1347 static int __devinit wbsd_request_region(struct wbsd_host *host, int base) 1348 { 1349 if (base & 0x7) 1350 return -EINVAL; 1351 1352 if (!request_region(base, 8, DRIVER_NAME)) 1353 return -EIO; 1354 1355 host->base = base; 1356 1357 return 0; 1358 } 1359 1360 static void wbsd_release_regions(struct wbsd_host *host) 1361 { 1362 if (host->base) 1363 release_region(host->base, 8); 1364 1365 host->base = 0; 1366 1367 if (host->config) 1368 release_region(host->config, 2); 1369 1370 host->config = 0; 1371 } 1372 1373 /* 1374 * Allocate/free DMA port and buffer 1375 */ 1376 1377 static void __devinit wbsd_request_dma(struct wbsd_host *host, int dma) 1378 { 1379 if (dma < 0) 1380 return; 1381 1382 if (request_dma(dma, DRIVER_NAME)) 1383 goto err; 1384 1385 /* 1386 * We need to allocate a special buffer in 1387 * order for ISA to be able to DMA to it. 1388 */ 1389 host->dma_buffer = kmalloc(WBSD_DMA_SIZE, 1390 GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN); 1391 if (!host->dma_buffer) 1392 goto free; 1393 1394 /* 1395 * Translate the address to a physical address. 1396 */ 1397 host->dma_addr = dma_map_single(mmc_dev(host->mmc), host->dma_buffer, 1398 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); 1399 1400 /* 1401 * ISA DMA must be aligned on a 64k basis. 1402 */ 1403 if ((host->dma_addr & 0xffff) != 0) 1404 goto kfree; 1405 /* 1406 * ISA cannot access memory above 16 MB. 1407 */ 1408 else if (host->dma_addr >= 0x1000000) 1409 goto kfree; 1410 1411 host->dma = dma; 1412 1413 return; 1414 1415 kfree: 1416 /* 1417 * If we've gotten here then there is some kind of alignment bug 1418 */ 1419 BUG_ON(1); 1420 1421 dma_unmap_single(mmc_dev(host->mmc), host->dma_addr, 1422 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); 1423 host->dma_addr = (dma_addr_t)NULL; 1424 1425 kfree(host->dma_buffer); 1426 host->dma_buffer = NULL; 1427 1428 free: 1429 free_dma(dma); 1430 1431 err: 1432 printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. " 1433 "Falling back on FIFO.\n", dma); 1434 } 1435 1436 static void wbsd_release_dma(struct wbsd_host *host) 1437 { 1438 if (host->dma_addr) { 1439 dma_unmap_single(mmc_dev(host->mmc), host->dma_addr, 1440 WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); 1441 } 1442 kfree(host->dma_buffer); 1443 if (host->dma >= 0) 1444 free_dma(host->dma); 1445 1446 host->dma = -1; 1447 host->dma_buffer = NULL; 1448 host->dma_addr = (dma_addr_t)NULL; 1449 } 1450 1451 /* 1452 * Allocate/free IRQ. 1453 */ 1454 1455 static int __devinit wbsd_request_irq(struct wbsd_host *host, int irq) 1456 { 1457 int ret; 1458 1459 /* 1460 * Allocate interrupt. 1461 */ 1462 1463 ret = request_irq(irq, wbsd_irq, IRQF_SHARED, DRIVER_NAME, host); 1464 if (ret) 1465 return ret; 1466 1467 host->irq = irq; 1468 1469 /* 1470 * Set up tasklets. 1471 */ 1472 tasklet_init(&host->card_tasklet, wbsd_tasklet_card, 1473 (unsigned long)host); 1474 tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, 1475 (unsigned long)host); 1476 tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, 1477 (unsigned long)host); 1478 tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, 1479 (unsigned long)host); 1480 tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, 1481 (unsigned long)host); 1482 1483 return 0; 1484 } 1485 1486 static void wbsd_release_irq(struct wbsd_host *host) 1487 { 1488 if (!host->irq) 1489 return; 1490 1491 free_irq(host->irq, host); 1492 1493 host->irq = 0; 1494 1495 tasklet_kill(&host->card_tasklet); 1496 tasklet_kill(&host->fifo_tasklet); 1497 tasklet_kill(&host->crc_tasklet); 1498 tasklet_kill(&host->timeout_tasklet); 1499 tasklet_kill(&host->finish_tasklet); 1500 } 1501 1502 /* 1503 * Allocate all resources for the host. 1504 */ 1505 1506 static int __devinit wbsd_request_resources(struct wbsd_host *host, 1507 int base, int irq, int dma) 1508 { 1509 int ret; 1510 1511 /* 1512 * Allocate I/O ports. 1513 */ 1514 ret = wbsd_request_region(host, base); 1515 if (ret) 1516 return ret; 1517 1518 /* 1519 * Allocate interrupt. 1520 */ 1521 ret = wbsd_request_irq(host, irq); 1522 if (ret) 1523 return ret; 1524 1525 /* 1526 * Allocate DMA. 1527 */ 1528 wbsd_request_dma(host, dma); 1529 1530 return 0; 1531 } 1532 1533 /* 1534 * Release all resources for the host. 1535 */ 1536 1537 static void wbsd_release_resources(struct wbsd_host *host) 1538 { 1539 wbsd_release_dma(host); 1540 wbsd_release_irq(host); 1541 wbsd_release_regions(host); 1542 } 1543 1544 /* 1545 * Configure the resources the chip should use. 1546 */ 1547 1548 static void wbsd_chip_config(struct wbsd_host *host) 1549 { 1550 wbsd_unlock_config(host); 1551 1552 /* 1553 * Reset the chip. 1554 */ 1555 wbsd_write_config(host, WBSD_CONF_SWRST, 1); 1556 wbsd_write_config(host, WBSD_CONF_SWRST, 0); 1557 1558 /* 1559 * Select SD/MMC function. 1560 */ 1561 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); 1562 1563 /* 1564 * Set up card detection. 1565 */ 1566 wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11); 1567 1568 /* 1569 * Configure chip 1570 */ 1571 wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8); 1572 wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff); 1573 1574 wbsd_write_config(host, WBSD_CONF_IRQ, host->irq); 1575 1576 if (host->dma >= 0) 1577 wbsd_write_config(host, WBSD_CONF_DRQ, host->dma); 1578 1579 /* 1580 * Enable and power up chip. 1581 */ 1582 wbsd_write_config(host, WBSD_CONF_ENABLE, 1); 1583 wbsd_write_config(host, WBSD_CONF_POWER, 0x20); 1584 1585 wbsd_lock_config(host); 1586 } 1587 1588 /* 1589 * Check that configured resources are correct. 1590 */ 1591 1592 static int wbsd_chip_validate(struct wbsd_host *host) 1593 { 1594 int base, irq, dma; 1595 1596 wbsd_unlock_config(host); 1597 1598 /* 1599 * Select SD/MMC function. 1600 */ 1601 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); 1602 1603 /* 1604 * Read configuration. 1605 */ 1606 base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8; 1607 base |= wbsd_read_config(host, WBSD_CONF_PORT_LO); 1608 1609 irq = wbsd_read_config(host, WBSD_CONF_IRQ); 1610 1611 dma = wbsd_read_config(host, WBSD_CONF_DRQ); 1612 1613 wbsd_lock_config(host); 1614 1615 /* 1616 * Validate against given configuration. 1617 */ 1618 if (base != host->base) 1619 return 0; 1620 if (irq != host->irq) 1621 return 0; 1622 if ((dma != host->dma) && (host->dma != -1)) 1623 return 0; 1624 1625 return 1; 1626 } 1627 1628 /* 1629 * Powers down the SD function 1630 */ 1631 1632 static void wbsd_chip_poweroff(struct wbsd_host *host) 1633 { 1634 wbsd_unlock_config(host); 1635 1636 wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); 1637 wbsd_write_config(host, WBSD_CONF_ENABLE, 0); 1638 1639 wbsd_lock_config(host); 1640 } 1641 1642 /*****************************************************************************\ 1643 * * 1644 * Devices setup and shutdown * 1645 * * 1646 \*****************************************************************************/ 1647 1648 static int __devinit wbsd_init(struct device *dev, int base, int irq, int dma, 1649 int pnp) 1650 { 1651 struct wbsd_host *host = NULL; 1652 struct mmc_host *mmc = NULL; 1653 int ret; 1654 1655 ret = wbsd_alloc_mmc(dev); 1656 if (ret) 1657 return ret; 1658 1659 mmc = dev_get_drvdata(dev); 1660 host = mmc_priv(mmc); 1661 1662 /* 1663 * Scan for hardware. 1664 */ 1665 ret = wbsd_scan(host); 1666 if (ret) { 1667 if (pnp && (ret == -ENODEV)) { 1668 printk(KERN_WARNING DRIVER_NAME 1669 ": Unable to confirm device presence. You may " 1670 "experience lock-ups.\n"); 1671 } else { 1672 wbsd_free_mmc(dev); 1673 return ret; 1674 } 1675 } 1676 1677 /* 1678 * Request resources. 1679 */ 1680 ret = wbsd_request_resources(host, base, irq, dma); 1681 if (ret) { 1682 wbsd_release_resources(host); 1683 wbsd_free_mmc(dev); 1684 return ret; 1685 } 1686 1687 /* 1688 * See if chip needs to be configured. 1689 */ 1690 if (pnp) { 1691 if ((host->config != 0) && !wbsd_chip_validate(host)) { 1692 printk(KERN_WARNING DRIVER_NAME 1693 ": PnP active but chip not configured! " 1694 "You probably have a buggy BIOS. " 1695 "Configuring chip manually.\n"); 1696 wbsd_chip_config(host); 1697 } 1698 } else 1699 wbsd_chip_config(host); 1700 1701 /* 1702 * Power Management stuff. No idea how this works. 1703 * Not tested. 1704 */ 1705 #ifdef CONFIG_PM 1706 if (host->config) { 1707 wbsd_unlock_config(host); 1708 wbsd_write_config(host, WBSD_CONF_PME, 0xA0); 1709 wbsd_lock_config(host); 1710 } 1711 #endif 1712 /* 1713 * Allow device to initialise itself properly. 1714 */ 1715 mdelay(5); 1716 1717 /* 1718 * Reset the chip into a known state. 1719 */ 1720 wbsd_init_device(host); 1721 1722 mmc_add_host(mmc); 1723 1724 printk(KERN_INFO "%s: W83L51xD", mmc_hostname(mmc)); 1725 if (host->chip_id != 0) 1726 printk(" id %x", (int)host->chip_id); 1727 printk(" at 0x%x irq %d", (int)host->base, (int)host->irq); 1728 if (host->dma >= 0) 1729 printk(" dma %d", (int)host->dma); 1730 else 1731 printk(" FIFO"); 1732 if (pnp) 1733 printk(" PnP"); 1734 printk("\n"); 1735 1736 return 0; 1737 } 1738 1739 static void __devexit wbsd_shutdown(struct device *dev, int pnp) 1740 { 1741 struct mmc_host *mmc = dev_get_drvdata(dev); 1742 struct wbsd_host *host; 1743 1744 if (!mmc) 1745 return; 1746 1747 host = mmc_priv(mmc); 1748 1749 mmc_remove_host(mmc); 1750 1751 /* 1752 * Power down the SD/MMC function. 1753 */ 1754 if (!pnp) 1755 wbsd_chip_poweroff(host); 1756 1757 wbsd_release_resources(host); 1758 1759 wbsd_free_mmc(dev); 1760 } 1761 1762 /* 1763 * Non-PnP 1764 */ 1765 1766 static int __devinit wbsd_probe(struct platform_device *dev) 1767 { 1768 /* Use the module parameters for resources */ 1769 return wbsd_init(&dev->dev, io, irq, dma, 0); 1770 } 1771 1772 static int __devexit wbsd_remove(struct platform_device *dev) 1773 { 1774 wbsd_shutdown(&dev->dev, 0); 1775 1776 return 0; 1777 } 1778 1779 /* 1780 * PnP 1781 */ 1782 1783 #ifdef CONFIG_PNP 1784 1785 static int __devinit 1786 wbsd_pnp_probe(struct pnp_dev *pnpdev, const struct pnp_device_id *dev_id) 1787 { 1788 int io, irq, dma; 1789 1790 /* 1791 * Get resources from PnP layer. 1792 */ 1793 io = pnp_port_start(pnpdev, 0); 1794 irq = pnp_irq(pnpdev, 0); 1795 if (pnp_dma_valid(pnpdev, 0)) 1796 dma = pnp_dma(pnpdev, 0); 1797 else 1798 dma = -1; 1799 1800 DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma); 1801 1802 return wbsd_init(&pnpdev->dev, io, irq, dma, 1); 1803 } 1804 1805 static void __devexit wbsd_pnp_remove(struct pnp_dev *dev) 1806 { 1807 wbsd_shutdown(&dev->dev, 1); 1808 } 1809 1810 #endif /* CONFIG_PNP */ 1811 1812 /* 1813 * Power management 1814 */ 1815 1816 #ifdef CONFIG_PM 1817 1818 static int wbsd_suspend(struct wbsd_host *host, pm_message_t state) 1819 { 1820 BUG_ON(host == NULL); 1821 1822 return mmc_suspend_host(host->mmc, state); 1823 } 1824 1825 static int wbsd_resume(struct wbsd_host *host) 1826 { 1827 BUG_ON(host == NULL); 1828 1829 wbsd_init_device(host); 1830 1831 return mmc_resume_host(host->mmc); 1832 } 1833 1834 static int wbsd_platform_suspend(struct platform_device *dev, 1835 pm_message_t state) 1836 { 1837 struct mmc_host *mmc = platform_get_drvdata(dev); 1838 struct wbsd_host *host; 1839 int ret; 1840 1841 if (mmc == NULL) 1842 return 0; 1843 1844 DBGF("Suspending...\n"); 1845 1846 host = mmc_priv(mmc); 1847 1848 ret = wbsd_suspend(host, state); 1849 if (ret) 1850 return ret; 1851 1852 wbsd_chip_poweroff(host); 1853 1854 return 0; 1855 } 1856 1857 static int wbsd_platform_resume(struct platform_device *dev) 1858 { 1859 struct mmc_host *mmc = platform_get_drvdata(dev); 1860 struct wbsd_host *host; 1861 1862 if (mmc == NULL) 1863 return 0; 1864 1865 DBGF("Resuming...\n"); 1866 1867 host = mmc_priv(mmc); 1868 1869 wbsd_chip_config(host); 1870 1871 /* 1872 * Allow device to initialise itself properly. 1873 */ 1874 mdelay(5); 1875 1876 return wbsd_resume(host); 1877 } 1878 1879 #ifdef CONFIG_PNP 1880 1881 static int wbsd_pnp_suspend(struct pnp_dev *pnp_dev, pm_message_t state) 1882 { 1883 struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev); 1884 struct wbsd_host *host; 1885 1886 if (mmc == NULL) 1887 return 0; 1888 1889 DBGF("Suspending...\n"); 1890 1891 host = mmc_priv(mmc); 1892 1893 return wbsd_suspend(host, state); 1894 } 1895 1896 static int wbsd_pnp_resume(struct pnp_dev *pnp_dev) 1897 { 1898 struct mmc_host *mmc = dev_get_drvdata(&pnp_dev->dev); 1899 struct wbsd_host *host; 1900 1901 if (mmc == NULL) 1902 return 0; 1903 1904 DBGF("Resuming...\n"); 1905 1906 host = mmc_priv(mmc); 1907 1908 /* 1909 * See if chip needs to be configured. 1910 */ 1911 if (host->config != 0) { 1912 if (!wbsd_chip_validate(host)) { 1913 printk(KERN_WARNING DRIVER_NAME 1914 ": PnP active but chip not configured! " 1915 "You probably have a buggy BIOS. " 1916 "Configuring chip manually.\n"); 1917 wbsd_chip_config(host); 1918 } 1919 } 1920 1921 /* 1922 * Allow device to initialise itself properly. 1923 */ 1924 mdelay(5); 1925 1926 return wbsd_resume(host); 1927 } 1928 1929 #endif /* CONFIG_PNP */ 1930 1931 #else /* CONFIG_PM */ 1932 1933 #define wbsd_platform_suspend NULL 1934 #define wbsd_platform_resume NULL 1935 1936 #define wbsd_pnp_suspend NULL 1937 #define wbsd_pnp_resume NULL 1938 1939 #endif /* CONFIG_PM */ 1940 1941 static struct platform_device *wbsd_device; 1942 1943 static struct platform_driver wbsd_driver = { 1944 .probe = wbsd_probe, 1945 .remove = __devexit_p(wbsd_remove), 1946 1947 .suspend = wbsd_platform_suspend, 1948 .resume = wbsd_platform_resume, 1949 .driver = { 1950 .name = DRIVER_NAME, 1951 }, 1952 }; 1953 1954 #ifdef CONFIG_PNP 1955 1956 static struct pnp_driver wbsd_pnp_driver = { 1957 .name = DRIVER_NAME, 1958 .id_table = pnp_dev_table, 1959 .probe = wbsd_pnp_probe, 1960 .remove = __devexit_p(wbsd_pnp_remove), 1961 1962 .suspend = wbsd_pnp_suspend, 1963 .resume = wbsd_pnp_resume, 1964 }; 1965 1966 #endif /* CONFIG_PNP */ 1967 1968 /* 1969 * Module loading/unloading 1970 */ 1971 1972 static int __init wbsd_drv_init(void) 1973 { 1974 int result; 1975 1976 printk(KERN_INFO DRIVER_NAME 1977 ": Winbond W83L51xD SD/MMC card interface driver\n"); 1978 printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); 1979 1980 #ifdef CONFIG_PNP 1981 1982 if (!nopnp) { 1983 result = pnp_register_driver(&wbsd_pnp_driver); 1984 if (result < 0) 1985 return result; 1986 } 1987 #endif /* CONFIG_PNP */ 1988 1989 if (nopnp) { 1990 result = platform_driver_register(&wbsd_driver); 1991 if (result < 0) 1992 return result; 1993 1994 wbsd_device = platform_device_alloc(DRIVER_NAME, -1); 1995 if (!wbsd_device) { 1996 platform_driver_unregister(&wbsd_driver); 1997 return -ENOMEM; 1998 } 1999 2000 result = platform_device_add(wbsd_device); 2001 if (result) { 2002 platform_device_put(wbsd_device); 2003 platform_driver_unregister(&wbsd_driver); 2004 return result; 2005 } 2006 } 2007 2008 return 0; 2009 } 2010 2011 static void __exit wbsd_drv_exit(void) 2012 { 2013 #ifdef CONFIG_PNP 2014 2015 if (!nopnp) 2016 pnp_unregister_driver(&wbsd_pnp_driver); 2017 2018 #endif /* CONFIG_PNP */ 2019 2020 if (nopnp) { 2021 platform_device_unregister(wbsd_device); 2022 2023 platform_driver_unregister(&wbsd_driver); 2024 } 2025 2026 DBG("unloaded\n"); 2027 } 2028 2029 module_init(wbsd_drv_init); 2030 module_exit(wbsd_drv_exit); 2031 #ifdef CONFIG_PNP 2032 module_param(nopnp, uint, 0444); 2033 #endif 2034 module_param(io, uint, 0444); 2035 module_param(irq, uint, 0444); 2036 module_param(dma, int, 0444); 2037 2038 MODULE_LICENSE("GPL"); 2039 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>"); 2040 MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver"); 2041 2042 #ifdef CONFIG_PNP 2043 MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)"); 2044 #endif 2045 MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)"); 2046 MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)"); 2047 MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)"); 2048