1 /** 2 * Copyright (c) 2014 Redpine Signals Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 * 16 */ 17 18 #include <linux/module.h> 19 #include "rsi_sdio.h" 20 #include "rsi_common.h" 21 22 /** 23 * rsi_sdio_set_cmd52_arg() - This function prepares cmd 52 read/write arg. 24 * @rw: Read/write 25 * @func: function number 26 * @raw: indicates whether to perform read after write 27 * @address: address to which to read/write 28 * @writedata: data to write 29 * 30 * Return: argument 31 */ 32 static u32 rsi_sdio_set_cmd52_arg(bool rw, 33 u8 func, 34 u8 raw, 35 u32 address, 36 u8 writedata) 37 { 38 return ((rw & 1) << 31) | ((func & 0x7) << 28) | 39 ((raw & 1) << 27) | (1 << 26) | 40 ((address & 0x1FFFF) << 9) | (1 << 8) | 41 (writedata & 0xFF); 42 } 43 44 /** 45 * rsi_cmd52writebyte() - This function issues cmd52 byte write onto the card. 46 * @card: Pointer to the mmc_card. 47 * @address: Address to write. 48 * @byte: Data to write. 49 * 50 * Return: Write status. 51 */ 52 static int rsi_cmd52writebyte(struct mmc_card *card, 53 u32 address, 54 u8 byte) 55 { 56 struct mmc_command io_cmd; 57 u32 arg; 58 59 memset(&io_cmd, 0, sizeof(io_cmd)); 60 arg = rsi_sdio_set_cmd52_arg(1, 0, 0, address, byte); 61 io_cmd.opcode = SD_IO_RW_DIRECT; 62 io_cmd.arg = arg; 63 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC; 64 65 return mmc_wait_for_cmd(card->host, &io_cmd, 0); 66 } 67 68 /** 69 * rsi_cmd52readbyte() - This function issues cmd52 byte read onto the card. 70 * @card: Pointer to the mmc_card. 71 * @address: Address to read from. 72 * @byte: Variable to store read value. 73 * 74 * Return: Read status. 75 */ 76 static int rsi_cmd52readbyte(struct mmc_card *card, 77 u32 address, 78 u8 *byte) 79 { 80 struct mmc_command io_cmd; 81 u32 arg; 82 int err; 83 84 memset(&io_cmd, 0, sizeof(io_cmd)); 85 arg = rsi_sdio_set_cmd52_arg(0, 0, 0, address, 0); 86 io_cmd.opcode = SD_IO_RW_DIRECT; 87 io_cmd.arg = arg; 88 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC; 89 90 err = mmc_wait_for_cmd(card->host, &io_cmd, 0); 91 if ((!err) && (byte)) 92 *byte = io_cmd.resp[0] & 0xFF; 93 return err; 94 } 95 96 /** 97 * rsi_issue_sdiocommand() - This function issues sdio commands. 98 * @func: Pointer to the sdio_func structure. 99 * @opcode: Opcode value. 100 * @arg: Arguments to pass. 101 * @flags: Flags which are set. 102 * @resp: Pointer to store response. 103 * 104 * Return: err: command status as 0 or -1. 105 */ 106 static int rsi_issue_sdiocommand(struct sdio_func *func, 107 u32 opcode, 108 u32 arg, 109 u32 flags, 110 u32 *resp) 111 { 112 struct mmc_command cmd; 113 struct mmc_host *host; 114 int err; 115 116 host = func->card->host; 117 118 memset(&cmd, 0, sizeof(struct mmc_command)); 119 cmd.opcode = opcode; 120 cmd.arg = arg; 121 cmd.flags = flags; 122 err = mmc_wait_for_cmd(host, &cmd, 3); 123 124 if ((!err) && (resp)) 125 *resp = cmd.resp[0]; 126 127 return err; 128 } 129 130 /** 131 * rsi_handle_interrupt() - This function is called upon the occurence 132 * of an interrupt. 133 * @function: Pointer to the sdio_func structure. 134 * 135 * Return: None. 136 */ 137 static void rsi_handle_interrupt(struct sdio_func *function) 138 { 139 struct rsi_hw *adapter = sdio_get_drvdata(function); 140 141 sdio_release_host(function); 142 rsi_interrupt_handler(adapter); 143 sdio_claim_host(function); 144 } 145 146 /** 147 * rsi_reset_card() - This function resets and re-initializes the card. 148 * @pfunction: Pointer to the sdio_func structure. 149 * 150 * Return: None. 151 */ 152 static void rsi_reset_card(struct sdio_func *pfunction) 153 { 154 int ret = 0; 155 int err; 156 struct mmc_card *card = pfunction->card; 157 struct mmc_host *host = card->host; 158 s32 bit = (fls(host->ocr_avail) - 1); 159 u8 cmd52_resp; 160 u32 clock, resp, i; 161 u16 rca; 162 163 /* Reset 9110 chip */ 164 ret = rsi_cmd52writebyte(pfunction->card, 165 SDIO_CCCR_ABORT, 166 (1 << 3)); 167 168 /* Card will not send any response as it is getting reset immediately 169 * Hence expect a timeout status from host controller 170 */ 171 if (ret != -ETIMEDOUT) 172 rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret); 173 174 /* Wait for few milli seconds to get rid of residue charges if any */ 175 msleep(20); 176 177 /* Initialize the SDIO card */ 178 host->ios.vdd = bit; 179 host->ios.chip_select = MMC_CS_DONTCARE; 180 host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; 181 host->ios.power_mode = MMC_POWER_UP; 182 host->ios.bus_width = MMC_BUS_WIDTH_1; 183 host->ios.timing = MMC_TIMING_LEGACY; 184 host->ops->set_ios(host, &host->ios); 185 186 /* 187 * This delay should be sufficient to allow the power supply 188 * to reach the minimum voltage. 189 */ 190 msleep(20); 191 192 host->ios.clock = host->f_min; 193 host->ios.power_mode = MMC_POWER_ON; 194 host->ops->set_ios(host, &host->ios); 195 196 /* 197 * This delay must be at least 74 clock sizes, or 1 ms, or the 198 * time required to reach a stable voltage. 199 */ 200 msleep(20); 201 202 /* Issue CMD0. Goto idle state */ 203 host->ios.chip_select = MMC_CS_HIGH; 204 host->ops->set_ios(host, &host->ios); 205 msleep(20); 206 err = rsi_issue_sdiocommand(pfunction, 207 MMC_GO_IDLE_STATE, 208 0, 209 (MMC_RSP_NONE | MMC_CMD_BC), 210 NULL); 211 host->ios.chip_select = MMC_CS_DONTCARE; 212 host->ops->set_ios(host, &host->ios); 213 msleep(20); 214 host->use_spi_crc = 0; 215 216 if (err) 217 rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err); 218 219 if (!host->ocr_avail) { 220 /* Issue CMD5, arg = 0 */ 221 err = rsi_issue_sdiocommand(pfunction, 222 SD_IO_SEND_OP_COND, 223 0, 224 (MMC_RSP_R4 | MMC_CMD_BCR), 225 &resp); 226 if (err) 227 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n", 228 __func__, err); 229 host->ocr_avail = resp; 230 } 231 232 /* Issue CMD5, arg = ocr. Wait till card is ready */ 233 for (i = 0; i < 100; i++) { 234 err = rsi_issue_sdiocommand(pfunction, 235 SD_IO_SEND_OP_COND, 236 host->ocr_avail, 237 (MMC_RSP_R4 | MMC_CMD_BCR), 238 &resp); 239 if (err) { 240 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n", 241 __func__, err); 242 break; 243 } 244 245 if (resp & MMC_CARD_BUSY) 246 break; 247 msleep(20); 248 } 249 250 if ((i == 100) || (err)) { 251 rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n", 252 __func__, i, err); 253 return; 254 } 255 256 /* Issue CMD3, get RCA */ 257 err = rsi_issue_sdiocommand(pfunction, 258 SD_SEND_RELATIVE_ADDR, 259 0, 260 (MMC_RSP_R6 | MMC_CMD_BCR), 261 &resp); 262 if (err) { 263 rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err); 264 return; 265 } 266 rca = resp >> 16; 267 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; 268 host->ops->set_ios(host, &host->ios); 269 270 /* Issue CMD7, select card */ 271 err = rsi_issue_sdiocommand(pfunction, 272 MMC_SELECT_CARD, 273 (rca << 16), 274 (MMC_RSP_R1 | MMC_CMD_AC), 275 NULL); 276 if (err) { 277 rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err); 278 return; 279 } 280 281 /* Enable high speed */ 282 if (card->host->caps & MMC_CAP_SD_HIGHSPEED) { 283 rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__); 284 err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp); 285 if (err) { 286 rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n", 287 __func__, err); 288 card->state &= ~MMC_STATE_HIGHSPEED; 289 } else { 290 err = rsi_cmd52writebyte(card, 291 SDIO_CCCR_SPEED, 292 (cmd52_resp | SDIO_SPEED_EHS)); 293 if (err) { 294 rsi_dbg(ERR_ZONE, 295 "%s: CCR speed regwrite failed %d\n", 296 __func__, err); 297 return; 298 } 299 mmc_card_set_highspeed(card); 300 host->ios.timing = MMC_TIMING_SD_HS; 301 host->ops->set_ios(host, &host->ios); 302 } 303 } 304 305 /* Set clock */ 306 if (mmc_card_highspeed(card)) 307 clock = 50000000; 308 else 309 clock = card->cis.max_dtr; 310 311 if (clock > host->f_max) 312 clock = host->f_max; 313 314 host->ios.clock = clock; 315 host->ops->set_ios(host, &host->ios); 316 317 if (card->host->caps & MMC_CAP_4_BIT_DATA) { 318 /* CMD52: Set bus width & disable card detect resistor */ 319 err = rsi_cmd52writebyte(card, 320 SDIO_CCCR_IF, 321 (SDIO_BUS_CD_DISABLE | 322 SDIO_BUS_WIDTH_4BIT)); 323 if (err) { 324 rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n", 325 __func__, err); 326 return; 327 } 328 host->ios.bus_width = MMC_BUS_WIDTH_4; 329 host->ops->set_ios(host, &host->ios); 330 } 331 } 332 333 /** 334 * rsi_setclock() - This function sets the clock frequency. 335 * @adapter: Pointer to the adapter structure. 336 * @freq: Clock frequency. 337 * 338 * Return: None. 339 */ 340 static void rsi_setclock(struct rsi_hw *adapter, u32 freq) 341 { 342 struct rsi_91x_sdiodev *dev = 343 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 344 struct mmc_host *host = dev->pfunction->card->host; 345 u32 clock; 346 347 clock = freq * 1000; 348 if (clock > host->f_max) 349 clock = host->f_max; 350 host->ios.clock = clock; 351 host->ops->set_ios(host, &host->ios); 352 } 353 354 /** 355 * rsi_setblocklength() - This function sets the host block length. 356 * @adapter: Pointer to the adapter structure. 357 * @length: Block length to be set. 358 * 359 * Return: status: 0 on success, -1 on failure. 360 */ 361 static int rsi_setblocklength(struct rsi_hw *adapter, u32 length) 362 { 363 struct rsi_91x_sdiodev *dev = 364 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 365 int status; 366 rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__); 367 368 status = sdio_set_block_size(dev->pfunction, length); 369 dev->pfunction->max_blksize = 256; 370 371 rsi_dbg(INFO_ZONE, 372 "%s: Operational blk length is %d\n", __func__, length); 373 return status; 374 } 375 376 /** 377 * rsi_setupcard() - This function queries and sets the card's features. 378 * @adapter: Pointer to the adapter structure. 379 * 380 * Return: status: 0 on success, -1 on failure. 381 */ 382 static int rsi_setupcard(struct rsi_hw *adapter) 383 { 384 struct rsi_91x_sdiodev *dev = 385 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 386 int status = 0; 387 388 rsi_setclock(adapter, 50000); 389 390 dev->tx_blk_size = 256; 391 status = rsi_setblocklength(adapter, dev->tx_blk_size); 392 if (status) 393 rsi_dbg(ERR_ZONE, 394 "%s: Unable to set block length\n", __func__); 395 return status; 396 } 397 398 /** 399 * rsi_sdio_read_register() - This function reads one byte of information 400 * from a register. 401 * @adapter: Pointer to the adapter structure. 402 * @addr: Address of the register. 403 * @data: Pointer to the data that stores the data read. 404 * 405 * Return: 0 on success, -1 on failure. 406 */ 407 int rsi_sdio_read_register(struct rsi_hw *adapter, 408 u32 addr, 409 u8 *data) 410 { 411 struct rsi_91x_sdiodev *dev = 412 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 413 u8 fun_num = 0; 414 int status; 415 416 sdio_claim_host(dev->pfunction); 417 418 if (fun_num == 0) 419 *data = sdio_f0_readb(dev->pfunction, addr, &status); 420 else 421 *data = sdio_readb(dev->pfunction, addr, &status); 422 423 sdio_release_host(dev->pfunction); 424 425 return status; 426 } 427 428 /** 429 * rsi_sdio_write_register() - This function writes one byte of information 430 * into a register. 431 * @adapter: Pointer to the adapter structure. 432 * @function: Function Number. 433 * @addr: Address of the register. 434 * @data: Pointer to the data tha has to be written. 435 * 436 * Return: 0 on success, -1 on failure. 437 */ 438 int rsi_sdio_write_register(struct rsi_hw *adapter, 439 u8 function, 440 u32 addr, 441 u8 *data) 442 { 443 struct rsi_91x_sdiodev *dev = 444 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 445 int status = 0; 446 447 sdio_claim_host(dev->pfunction); 448 449 if (function == 0) 450 sdio_f0_writeb(dev->pfunction, *data, addr, &status); 451 else 452 sdio_writeb(dev->pfunction, *data, addr, &status); 453 454 sdio_release_host(dev->pfunction); 455 456 return status; 457 } 458 459 /** 460 * rsi_sdio_ack_intr() - This function acks the interrupt received. 461 * @adapter: Pointer to the adapter structure. 462 * @int_bit: Interrupt bit to write into register. 463 * 464 * Return: None. 465 */ 466 void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit) 467 { 468 int status; 469 status = rsi_sdio_write_register(adapter, 470 1, 471 (SDIO_FUN1_INTR_CLR_REG | 472 RSI_SD_REQUEST_MASTER), 473 &int_bit); 474 if (status) 475 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__); 476 } 477 478 479 480 /** 481 * rsi_sdio_read_register_multiple() - This function read multiple bytes of 482 * information from the SD card. 483 * @adapter: Pointer to the adapter structure. 484 * @addr: Address of the register. 485 * @count: Number of multiple bytes to be read. 486 * @data: Pointer to the read data. 487 * 488 * Return: 0 on success, -1 on failure. 489 */ 490 static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter, 491 u32 addr, 492 u32 count, 493 u8 *data) 494 { 495 struct rsi_91x_sdiodev *dev = 496 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 497 u32 status; 498 499 sdio_claim_host(dev->pfunction); 500 501 status = sdio_readsb(dev->pfunction, data, addr, count); 502 503 sdio_release_host(dev->pfunction); 504 505 if (status != 0) 506 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__); 507 return status; 508 } 509 510 /** 511 * rsi_sdio_write_register_multiple() - This function writes multiple bytes of 512 * information to the SD card. 513 * @adapter: Pointer to the adapter structure. 514 * @addr: Address of the register. 515 * @data: Pointer to the data that has to be written. 516 * @count: Number of multiple bytes to be written. 517 * 518 * Return: 0 on success, -1 on failure. 519 */ 520 int rsi_sdio_write_register_multiple(struct rsi_hw *adapter, 521 u32 addr, 522 u8 *data, 523 u32 count) 524 { 525 struct rsi_91x_sdiodev *dev = 526 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 527 int status; 528 529 if (dev->write_fail > 1) { 530 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__); 531 return 0; 532 } else if (dev->write_fail == 1) { 533 /** 534 * Assuming it is a CRC failure, we want to allow another 535 * card write 536 */ 537 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__); 538 dev->write_fail++; 539 } 540 541 sdio_claim_host(dev->pfunction); 542 543 status = sdio_writesb(dev->pfunction, addr, data, count); 544 545 sdio_release_host(dev->pfunction); 546 547 if (status) { 548 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n", 549 __func__, status); 550 dev->write_fail = 2; 551 } else { 552 memcpy(dev->prev_desc, data, FRAME_DESC_SZ); 553 } 554 return status; 555 } 556 557 /** 558 * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device. 559 * @adapter: Pointer to the adapter structure. 560 * @pkt: Pointer to the data to be written on to the device. 561 * @len: length of the data to be written on to the device. 562 * 563 * Return: 0 on success, -1 on failure. 564 */ 565 static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter, 566 u8 *pkt, 567 u32 len) 568 { 569 struct rsi_91x_sdiodev *dev = 570 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 571 u32 block_size = dev->tx_blk_size; 572 u32 num_blocks, address, length; 573 u32 queueno; 574 int status; 575 576 queueno = ((pkt[1] >> 4) & 0xf); 577 578 num_blocks = len / block_size; 579 580 if (len % block_size) 581 num_blocks++; 582 583 address = (num_blocks * block_size | (queueno << 12)); 584 length = num_blocks * block_size; 585 586 status = rsi_sdio_write_register_multiple(adapter, 587 address, 588 (u8 *)pkt, 589 length); 590 if (status) 591 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n", 592 __func__, status); 593 rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__); 594 return status; 595 } 596 597 /** 598 * rsi_sdio_host_intf_read_pkt() - This function reads the packet 599 from the device. 600 * @adapter: Pointer to the adapter data structure. 601 * @pkt: Pointer to the packet data to be read from the the device. 602 * @length: Length of the data to be read from the device. 603 * 604 * Return: 0 on success, -1 on failure. 605 */ 606 int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter, 607 u8 *pkt, 608 u32 length) 609 { 610 int status = -EINVAL; 611 612 if (!length) { 613 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__); 614 return status; 615 } 616 617 status = rsi_sdio_read_register_multiple(adapter, 618 length, 619 length, /*num of bytes*/ 620 (u8 *)pkt); 621 622 if (status) 623 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__, 624 status); 625 return status; 626 } 627 628 /** 629 * rsi_init_sdio_interface() - This function does init specific to SDIO. 630 * 631 * @adapter: Pointer to the adapter data structure. 632 * @pkt: Pointer to the packet data to be read from the the device. 633 * 634 * Return: 0 on success, -1 on failure. 635 */ 636 637 static int rsi_init_sdio_interface(struct rsi_hw *adapter, 638 struct sdio_func *pfunction) 639 { 640 struct rsi_91x_sdiodev *rsi_91x_dev; 641 int status = -ENOMEM; 642 643 rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL); 644 if (!rsi_91x_dev) 645 return status; 646 647 adapter->rsi_dev = rsi_91x_dev; 648 649 sdio_claim_host(pfunction); 650 651 pfunction->enable_timeout = 100; 652 status = sdio_enable_func(pfunction); 653 if (status) { 654 rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__); 655 sdio_release_host(pfunction); 656 return status; 657 } 658 659 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__); 660 661 rsi_91x_dev->pfunction = pfunction; 662 adapter->device = &pfunction->dev; 663 664 sdio_set_drvdata(pfunction, adapter); 665 666 status = rsi_setupcard(adapter); 667 if (status) { 668 rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__); 669 goto fail; 670 } 671 672 rsi_dbg(INIT_ZONE, "%s: Setup card succesfully\n", __func__); 673 674 status = rsi_init_sdio_slave_regs(adapter); 675 if (status) { 676 rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__); 677 goto fail; 678 } 679 sdio_release_host(pfunction); 680 681 adapter->host_intf_write_pkt = rsi_sdio_host_intf_write_pkt; 682 adapter->host_intf_read_pkt = rsi_sdio_host_intf_read_pkt; 683 adapter->determine_event_timeout = rsi_sdio_determine_event_timeout; 684 adapter->check_hw_queue_status = rsi_sdio_read_buffer_status_register; 685 686 #ifdef CONFIG_RSI_DEBUGFS 687 adapter->num_debugfs_entries = MAX_DEBUGFS_ENTRIES; 688 #endif 689 return status; 690 fail: 691 sdio_disable_func(pfunction); 692 sdio_release_host(pfunction); 693 return status; 694 } 695 696 /** 697 * rsi_probe() - This function is called by kernel when the driver provided 698 * Vendor and device IDs are matched. All the initialization 699 * work is done here. 700 * @pfunction: Pointer to the sdio_func structure. 701 * @id: Pointer to sdio_device_id structure. 702 * 703 * Return: 0 on success, 1 on failure. 704 */ 705 static int rsi_probe(struct sdio_func *pfunction, 706 const struct sdio_device_id *id) 707 { 708 struct rsi_hw *adapter; 709 710 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__); 711 712 adapter = rsi_91x_init(); 713 if (!adapter) { 714 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n", 715 __func__); 716 return 1; 717 } 718 719 if (rsi_init_sdio_interface(adapter, pfunction)) { 720 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n", 721 __func__); 722 goto fail; 723 } 724 725 if (rsi_sdio_device_init(adapter->priv)) { 726 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__); 727 sdio_claim_host(pfunction); 728 sdio_disable_func(pfunction); 729 sdio_release_host(pfunction); 730 goto fail; 731 } 732 733 sdio_claim_host(pfunction); 734 if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) { 735 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__); 736 sdio_release_host(pfunction); 737 goto fail; 738 } 739 740 sdio_release_host(pfunction); 741 rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__); 742 743 return 0; 744 fail: 745 rsi_91x_deinit(adapter); 746 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__); 747 return 1; 748 } 749 750 /** 751 * rsi_disconnect() - This function performs the reverse of the probe function. 752 * @pfunction: Pointer to the sdio_func structure. 753 * 754 * Return: void. 755 */ 756 static void rsi_disconnect(struct sdio_func *pfunction) 757 { 758 struct rsi_hw *adapter = sdio_get_drvdata(pfunction); 759 struct rsi_91x_sdiodev *dev; 760 761 if (!adapter) 762 return; 763 764 dev = (struct rsi_91x_sdiodev *)adapter->rsi_dev; 765 766 dev->write_fail = 2; 767 rsi_mac80211_detach(adapter); 768 769 sdio_claim_host(pfunction); 770 sdio_release_irq(pfunction); 771 sdio_disable_func(pfunction); 772 rsi_91x_deinit(adapter); 773 /* Resetting to take care of the case, where-in driver is re-loaded */ 774 rsi_reset_card(pfunction); 775 sdio_release_host(pfunction); 776 } 777 778 #ifdef CONFIG_PM 779 static int rsi_suspend(struct device *dev) 780 { 781 /* Not yet implemented */ 782 return -ENOSYS; 783 } 784 785 static int rsi_resume(struct device *dev) 786 { 787 /* Not yet implemented */ 788 return -ENOSYS; 789 } 790 791 static const struct dev_pm_ops rsi_pm_ops = { 792 .suspend = rsi_suspend, 793 .resume = rsi_resume, 794 }; 795 #endif 796 797 static const struct sdio_device_id rsi_dev_table[] = { 798 { SDIO_DEVICE(0x303, 0x100) }, 799 { SDIO_DEVICE(0x041B, 0x0301) }, 800 { SDIO_DEVICE(0x041B, 0x0201) }, 801 { SDIO_DEVICE(0x041B, 0x9330) }, 802 { /* Blank */}, 803 }; 804 805 static struct sdio_driver rsi_driver = { 806 .name = "RSI-SDIO WLAN", 807 .probe = rsi_probe, 808 .remove = rsi_disconnect, 809 .id_table = rsi_dev_table, 810 #ifdef CONFIG_PM 811 .drv = { 812 .pm = &rsi_pm_ops, 813 } 814 #endif 815 }; 816 817 /** 818 * rsi_module_init() - This function registers the sdio module. 819 * @void: Void. 820 * 821 * Return: 0 on success. 822 */ 823 static int rsi_module_init(void) 824 { 825 sdio_register_driver(&rsi_driver); 826 rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__); 827 return 0; 828 } 829 830 /** 831 * rsi_module_exit() - This function unregisters the sdio module. 832 * @void: Void. 833 * 834 * Return: None. 835 */ 836 static void rsi_module_exit(void) 837 { 838 sdio_unregister_driver(&rsi_driver); 839 rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__); 840 } 841 842 module_init(rsi_module_init); 843 module_exit(rsi_module_exit); 844 845 MODULE_AUTHOR("Redpine Signals Inc"); 846 MODULE_DESCRIPTION("Common SDIO layer for RSI drivers"); 847 MODULE_SUPPORTED_DEVICE("RSI-91x"); 848 MODULE_DEVICE_TABLE(sdio, rsi_dev_table); 849 MODULE_FIRMWARE(FIRMWARE_RSI9113); 850 MODULE_VERSION("0.1"); 851 MODULE_LICENSE("Dual BSD/GPL"); 852