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 } else { 289 err = rsi_cmd52writebyte(card, 290 SDIO_CCCR_SPEED, 291 (cmd52_resp | SDIO_SPEED_EHS)); 292 if (err) { 293 rsi_dbg(ERR_ZONE, 294 "%s: CCR speed regwrite failed %d\n", 295 __func__, err); 296 return; 297 } 298 host->ios.timing = MMC_TIMING_SD_HS; 299 host->ops->set_ios(host, &host->ios); 300 } 301 } 302 303 /* Set clock */ 304 if (mmc_card_hs(card)) 305 clock = 50000000; 306 else 307 clock = card->cis.max_dtr; 308 309 if (clock > host->f_max) 310 clock = host->f_max; 311 312 host->ios.clock = clock; 313 host->ops->set_ios(host, &host->ios); 314 315 if (card->host->caps & MMC_CAP_4_BIT_DATA) { 316 /* CMD52: Set bus width & disable card detect resistor */ 317 err = rsi_cmd52writebyte(card, 318 SDIO_CCCR_IF, 319 (SDIO_BUS_CD_DISABLE | 320 SDIO_BUS_WIDTH_4BIT)); 321 if (err) { 322 rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n", 323 __func__, err); 324 return; 325 } 326 host->ios.bus_width = MMC_BUS_WIDTH_4; 327 host->ops->set_ios(host, &host->ios); 328 } 329 } 330 331 /** 332 * rsi_setclock() - This function sets the clock frequency. 333 * @adapter: Pointer to the adapter structure. 334 * @freq: Clock frequency. 335 * 336 * Return: None. 337 */ 338 static void rsi_setclock(struct rsi_hw *adapter, u32 freq) 339 { 340 struct rsi_91x_sdiodev *dev = 341 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 342 struct mmc_host *host = dev->pfunction->card->host; 343 u32 clock; 344 345 clock = freq * 1000; 346 if (clock > host->f_max) 347 clock = host->f_max; 348 host->ios.clock = clock; 349 host->ops->set_ios(host, &host->ios); 350 } 351 352 /** 353 * rsi_setblocklength() - This function sets the host block length. 354 * @adapter: Pointer to the adapter structure. 355 * @length: Block length to be set. 356 * 357 * Return: status: 0 on success, -1 on failure. 358 */ 359 static int rsi_setblocklength(struct rsi_hw *adapter, u32 length) 360 { 361 struct rsi_91x_sdiodev *dev = 362 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 363 int status; 364 rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__); 365 366 status = sdio_set_block_size(dev->pfunction, length); 367 dev->pfunction->max_blksize = 256; 368 369 rsi_dbg(INFO_ZONE, 370 "%s: Operational blk length is %d\n", __func__, length); 371 return status; 372 } 373 374 /** 375 * rsi_setupcard() - This function queries and sets the card's features. 376 * @adapter: Pointer to the adapter structure. 377 * 378 * Return: status: 0 on success, -1 on failure. 379 */ 380 static int rsi_setupcard(struct rsi_hw *adapter) 381 { 382 struct rsi_91x_sdiodev *dev = 383 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 384 int status = 0; 385 386 rsi_setclock(adapter, 50000); 387 388 dev->tx_blk_size = 256; 389 status = rsi_setblocklength(adapter, dev->tx_blk_size); 390 if (status) 391 rsi_dbg(ERR_ZONE, 392 "%s: Unable to set block length\n", __func__); 393 return status; 394 } 395 396 /** 397 * rsi_sdio_read_register() - This function reads one byte of information 398 * from a register. 399 * @adapter: Pointer to the adapter structure. 400 * @addr: Address of the register. 401 * @data: Pointer to the data that stores the data read. 402 * 403 * Return: 0 on success, -1 on failure. 404 */ 405 int rsi_sdio_read_register(struct rsi_hw *adapter, 406 u32 addr, 407 u8 *data) 408 { 409 struct rsi_91x_sdiodev *dev = 410 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 411 u8 fun_num = 0; 412 int status; 413 414 sdio_claim_host(dev->pfunction); 415 416 if (fun_num == 0) 417 *data = sdio_f0_readb(dev->pfunction, addr, &status); 418 else 419 *data = sdio_readb(dev->pfunction, addr, &status); 420 421 sdio_release_host(dev->pfunction); 422 423 return status; 424 } 425 426 /** 427 * rsi_sdio_write_register() - This function writes one byte of information 428 * into a register. 429 * @adapter: Pointer to the adapter structure. 430 * @function: Function Number. 431 * @addr: Address of the register. 432 * @data: Pointer to the data tha has to be written. 433 * 434 * Return: 0 on success, -1 on failure. 435 */ 436 int rsi_sdio_write_register(struct rsi_hw *adapter, 437 u8 function, 438 u32 addr, 439 u8 *data) 440 { 441 struct rsi_91x_sdiodev *dev = 442 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 443 int status = 0; 444 445 sdio_claim_host(dev->pfunction); 446 447 if (function == 0) 448 sdio_f0_writeb(dev->pfunction, *data, addr, &status); 449 else 450 sdio_writeb(dev->pfunction, *data, addr, &status); 451 452 sdio_release_host(dev->pfunction); 453 454 return status; 455 } 456 457 /** 458 * rsi_sdio_ack_intr() - This function acks the interrupt received. 459 * @adapter: Pointer to the adapter structure. 460 * @int_bit: Interrupt bit to write into register. 461 * 462 * Return: None. 463 */ 464 void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit) 465 { 466 int status; 467 status = rsi_sdio_write_register(adapter, 468 1, 469 (SDIO_FUN1_INTR_CLR_REG | 470 RSI_SD_REQUEST_MASTER), 471 &int_bit); 472 if (status) 473 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__); 474 } 475 476 477 478 /** 479 * rsi_sdio_read_register_multiple() - This function read multiple bytes of 480 * information from the SD card. 481 * @adapter: Pointer to the adapter structure. 482 * @addr: Address of the register. 483 * @count: Number of multiple bytes to be read. 484 * @data: Pointer to the read data. 485 * 486 * Return: 0 on success, -1 on failure. 487 */ 488 static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter, 489 u32 addr, 490 u32 count, 491 u8 *data) 492 { 493 struct rsi_91x_sdiodev *dev = 494 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 495 u32 status; 496 497 sdio_claim_host(dev->pfunction); 498 499 status = sdio_readsb(dev->pfunction, data, addr, count); 500 501 sdio_release_host(dev->pfunction); 502 503 if (status != 0) 504 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__); 505 return status; 506 } 507 508 /** 509 * rsi_sdio_write_register_multiple() - This function writes multiple bytes of 510 * information to the SD card. 511 * @adapter: Pointer to the adapter structure. 512 * @addr: Address of the register. 513 * @data: Pointer to the data that has to be written. 514 * @count: Number of multiple bytes to be written. 515 * 516 * Return: 0 on success, -1 on failure. 517 */ 518 int rsi_sdio_write_register_multiple(struct rsi_hw *adapter, 519 u32 addr, 520 u8 *data, 521 u32 count) 522 { 523 struct rsi_91x_sdiodev *dev = 524 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 525 int status; 526 527 if (dev->write_fail > 1) { 528 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__); 529 return 0; 530 } else if (dev->write_fail == 1) { 531 /** 532 * Assuming it is a CRC failure, we want to allow another 533 * card write 534 */ 535 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__); 536 dev->write_fail++; 537 } 538 539 sdio_claim_host(dev->pfunction); 540 541 status = sdio_writesb(dev->pfunction, addr, data, count); 542 543 sdio_release_host(dev->pfunction); 544 545 if (status) { 546 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n", 547 __func__, status); 548 dev->write_fail = 2; 549 } else { 550 memcpy(dev->prev_desc, data, FRAME_DESC_SZ); 551 } 552 return status; 553 } 554 555 /** 556 * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device. 557 * @adapter: Pointer to the adapter structure. 558 * @pkt: Pointer to the data to be written on to the device. 559 * @len: length of the data to be written on to the device. 560 * 561 * Return: 0 on success, -1 on failure. 562 */ 563 static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter, 564 u8 *pkt, 565 u32 len) 566 { 567 struct rsi_91x_sdiodev *dev = 568 (struct rsi_91x_sdiodev *)adapter->rsi_dev; 569 u32 block_size = dev->tx_blk_size; 570 u32 num_blocks, address, length; 571 u32 queueno; 572 int status; 573 574 queueno = ((pkt[1] >> 4) & 0xf); 575 576 num_blocks = len / block_size; 577 578 if (len % block_size) 579 num_blocks++; 580 581 address = (num_blocks * block_size | (queueno << 12)); 582 length = num_blocks * block_size; 583 584 status = rsi_sdio_write_register_multiple(adapter, 585 address, 586 (u8 *)pkt, 587 length); 588 if (status) 589 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n", 590 __func__, status); 591 rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__); 592 return status; 593 } 594 595 /** 596 * rsi_sdio_host_intf_read_pkt() - This function reads the packet 597 from the device. 598 * @adapter: Pointer to the adapter data structure. 599 * @pkt: Pointer to the packet data to be read from the the device. 600 * @length: Length of the data to be read from the device. 601 * 602 * Return: 0 on success, -1 on failure. 603 */ 604 int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter, 605 u8 *pkt, 606 u32 length) 607 { 608 int status = -EINVAL; 609 610 if (!length) { 611 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__); 612 return status; 613 } 614 615 status = rsi_sdio_read_register_multiple(adapter, 616 length, 617 length, /*num of bytes*/ 618 (u8 *)pkt); 619 620 if (status) 621 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__, 622 status); 623 return status; 624 } 625 626 /** 627 * rsi_init_sdio_interface() - This function does init specific to SDIO. 628 * 629 * @adapter: Pointer to the adapter data structure. 630 * @pkt: Pointer to the packet data to be read from the the device. 631 * 632 * Return: 0 on success, -1 on failure. 633 */ 634 635 static int rsi_init_sdio_interface(struct rsi_hw *adapter, 636 struct sdio_func *pfunction) 637 { 638 struct rsi_91x_sdiodev *rsi_91x_dev; 639 int status = -ENOMEM; 640 641 rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL); 642 if (!rsi_91x_dev) 643 return status; 644 645 adapter->rsi_dev = rsi_91x_dev; 646 647 sdio_claim_host(pfunction); 648 649 pfunction->enable_timeout = 100; 650 status = sdio_enable_func(pfunction); 651 if (status) { 652 rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__); 653 sdio_release_host(pfunction); 654 return status; 655 } 656 657 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__); 658 659 rsi_91x_dev->pfunction = pfunction; 660 adapter->device = &pfunction->dev; 661 662 sdio_set_drvdata(pfunction, adapter); 663 664 status = rsi_setupcard(adapter); 665 if (status) { 666 rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__); 667 goto fail; 668 } 669 670 rsi_dbg(INIT_ZONE, "%s: Setup card succesfully\n", __func__); 671 672 status = rsi_init_sdio_slave_regs(adapter); 673 if (status) { 674 rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__); 675 goto fail; 676 } 677 sdio_release_host(pfunction); 678 679 adapter->host_intf_write_pkt = rsi_sdio_host_intf_write_pkt; 680 adapter->host_intf_read_pkt = rsi_sdio_host_intf_read_pkt; 681 adapter->determine_event_timeout = rsi_sdio_determine_event_timeout; 682 adapter->check_hw_queue_status = rsi_sdio_read_buffer_status_register; 683 684 #ifdef CONFIG_RSI_DEBUGFS 685 adapter->num_debugfs_entries = MAX_DEBUGFS_ENTRIES; 686 #endif 687 return status; 688 fail: 689 sdio_disable_func(pfunction); 690 sdio_release_host(pfunction); 691 return status; 692 } 693 694 /** 695 * rsi_probe() - This function is called by kernel when the driver provided 696 * Vendor and device IDs are matched. All the initialization 697 * work is done here. 698 * @pfunction: Pointer to the sdio_func structure. 699 * @id: Pointer to sdio_device_id structure. 700 * 701 * Return: 0 on success, 1 on failure. 702 */ 703 static int rsi_probe(struct sdio_func *pfunction, 704 const struct sdio_device_id *id) 705 { 706 struct rsi_hw *adapter; 707 708 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__); 709 710 adapter = rsi_91x_init(); 711 if (!adapter) { 712 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n", 713 __func__); 714 return 1; 715 } 716 717 if (rsi_init_sdio_interface(adapter, pfunction)) { 718 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n", 719 __func__); 720 goto fail; 721 } 722 723 if (rsi_sdio_device_init(adapter->priv)) { 724 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__); 725 sdio_claim_host(pfunction); 726 sdio_disable_func(pfunction); 727 sdio_release_host(pfunction); 728 goto fail; 729 } 730 731 sdio_claim_host(pfunction); 732 if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) { 733 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__); 734 sdio_release_host(pfunction); 735 goto fail; 736 } 737 738 sdio_release_host(pfunction); 739 rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__); 740 741 return 0; 742 fail: 743 rsi_91x_deinit(adapter); 744 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__); 745 return 1; 746 } 747 748 /** 749 * rsi_disconnect() - This function performs the reverse of the probe function. 750 * @pfunction: Pointer to the sdio_func structure. 751 * 752 * Return: void. 753 */ 754 static void rsi_disconnect(struct sdio_func *pfunction) 755 { 756 struct rsi_hw *adapter = sdio_get_drvdata(pfunction); 757 struct rsi_91x_sdiodev *dev; 758 759 if (!adapter) 760 return; 761 762 dev = (struct rsi_91x_sdiodev *)adapter->rsi_dev; 763 764 dev->write_fail = 2; 765 rsi_mac80211_detach(adapter); 766 767 sdio_claim_host(pfunction); 768 sdio_release_irq(pfunction); 769 sdio_disable_func(pfunction); 770 rsi_91x_deinit(adapter); 771 /* Resetting to take care of the case, where-in driver is re-loaded */ 772 rsi_reset_card(pfunction); 773 sdio_release_host(pfunction); 774 } 775 776 #ifdef CONFIG_PM 777 static int rsi_suspend(struct device *dev) 778 { 779 /* Not yet implemented */ 780 return -ENOSYS; 781 } 782 783 static int rsi_resume(struct device *dev) 784 { 785 /* Not yet implemented */ 786 return -ENOSYS; 787 } 788 789 static const struct dev_pm_ops rsi_pm_ops = { 790 .suspend = rsi_suspend, 791 .resume = rsi_resume, 792 }; 793 #endif 794 795 static const struct sdio_device_id rsi_dev_table[] = { 796 { SDIO_DEVICE(0x303, 0x100) }, 797 { SDIO_DEVICE(0x041B, 0x0301) }, 798 { SDIO_DEVICE(0x041B, 0x0201) }, 799 { SDIO_DEVICE(0x041B, 0x9330) }, 800 { /* Blank */}, 801 }; 802 803 static struct sdio_driver rsi_driver = { 804 .name = "RSI-SDIO WLAN", 805 .probe = rsi_probe, 806 .remove = rsi_disconnect, 807 .id_table = rsi_dev_table, 808 #ifdef CONFIG_PM 809 .drv = { 810 .pm = &rsi_pm_ops, 811 } 812 #endif 813 }; 814 815 /** 816 * rsi_module_init() - This function registers the sdio module. 817 * @void: Void. 818 * 819 * Return: 0 on success. 820 */ 821 static int rsi_module_init(void) 822 { 823 int ret; 824 825 ret = sdio_register_driver(&rsi_driver); 826 rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__); 827 return ret; 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