1/** 2 * Marvell BT-over-SDIO driver: SDIO interface related functions. 3 * 4 * Copyright (C) 2009, Marvell International Ltd. 5 * 6 * This software file (the "File") is distributed by Marvell International 7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991 8 * (the "License"). You may use, redistribute and/or modify this File in 9 * accordance with the terms and conditions of the License, a copy of which 10 * is available by writing to the Free Software Foundation, Inc., 11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the 12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. 13 * 14 * 15 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 17 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about 18 * this warranty disclaimer. 19 **/ 20 21#include <linux/firmware.h> 22#include <linux/slab.h> 23 24#include <linux/mmc/sdio_ids.h> 25#include <linux/mmc/sdio_func.h> 26 27#include <net/bluetooth/bluetooth.h> 28#include <net/bluetooth/hci_core.h> 29 30#include "btmrvl_drv.h" 31#include "btmrvl_sdio.h" 32 33#define VERSION "1.0" 34 35/* The btmrvl_sdio_remove() callback function is called 36 * when user removes this module from kernel space or ejects 37 * the card from the slot. The driver handles these 2 cases 38 * differently. 39 * If the user is removing the module, a MODULE_SHUTDOWN_REQ 40 * command is sent to firmware and interrupt will be disabled. 41 * If the card is removed, there is no need to send command 42 * or disable interrupt. 43 * 44 * The variable 'user_rmmod' is used to distinguish these two 45 * scenarios. This flag is initialized as FALSE in case the card 46 * is removed, and will be set to TRUE for module removal when 47 * module_exit function is called. 48 */ 49static u8 user_rmmod; 50static u8 sdio_ireg; 51 52static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = { 53 .helper = "sd8688_helper.bin", 54 .firmware = "sd8688.bin", 55}; 56 57static const struct sdio_device_id btmrvl_sdio_ids[] = { 58 /* Marvell SD8688 Bluetooth device */ 59 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105), 60 .driver_data = (unsigned long) &btmrvl_sdio_sd6888 }, 61 62 { } /* Terminating entry */ 63}; 64 65MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids); 66 67static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card) 68{ 69 u8 reg; 70 int ret; 71 72 reg = sdio_readb(card->func, CARD_RX_UNIT_REG, &ret); 73 if (!ret) 74 card->rx_unit = reg; 75 76 return ret; 77} 78 79static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat) 80{ 81 u8 fws0, fws1; 82 int ret; 83 84 *dat = 0; 85 86 fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret); 87 if (ret) 88 return -EIO; 89 90 fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret); 91 if (ret) 92 return -EIO; 93 94 *dat = (((u16) fws1) << 8) | fws0; 95 96 return 0; 97} 98 99static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat) 100{ 101 u8 reg; 102 int ret; 103 104 reg = sdio_readb(card->func, CARD_RX_LEN_REG, &ret); 105 if (!ret) 106 *dat = (u16) reg << card->rx_unit; 107 108 return ret; 109} 110 111static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card, 112 u8 mask) 113{ 114 int ret; 115 116 sdio_writeb(card->func, mask, HOST_INT_MASK_REG, &ret); 117 if (ret) { 118 BT_ERR("Unable to enable the host interrupt!"); 119 ret = -EIO; 120 } 121 122 return ret; 123} 124 125static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card, 126 u8 mask) 127{ 128 u8 host_int_mask; 129 int ret; 130 131 host_int_mask = sdio_readb(card->func, HOST_INT_MASK_REG, &ret); 132 if (ret) 133 return -EIO; 134 135 host_int_mask &= ~mask; 136 137 sdio_writeb(card->func, host_int_mask, HOST_INT_MASK_REG, &ret); 138 if (ret < 0) { 139 BT_ERR("Unable to disable the host interrupt!"); 140 return -EIO; 141 } 142 143 return 0; 144} 145 146static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits) 147{ 148 unsigned int tries; 149 u8 status; 150 int ret; 151 152 for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) { 153 status = sdio_readb(card->func, CARD_STATUS_REG, &ret); 154 if (ret) 155 goto failed; 156 if ((status & bits) == bits) 157 return ret; 158 159 udelay(1); 160 } 161 162 ret = -ETIMEDOUT; 163 164failed: 165 BT_ERR("FAILED! ret=%d", ret); 166 167 return ret; 168} 169 170static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card, 171 int pollnum) 172{ 173 int ret = -ETIMEDOUT; 174 u16 firmwarestat; 175 unsigned int tries; 176 177 /* Wait for firmware to become ready */ 178 for (tries = 0; tries < pollnum; tries++) { 179 if (btmrvl_sdio_read_fw_status(card, &firmwarestat) < 0) 180 continue; 181 182 if (firmwarestat == FIRMWARE_READY) { 183 ret = 0; 184 break; 185 } else { 186 msleep(10); 187 } 188 } 189 190 return ret; 191} 192 193static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card) 194{ 195 const struct firmware *fw_helper = NULL; 196 const u8 *helper = NULL; 197 int ret; 198 void *tmphlprbuf = NULL; 199 int tmphlprbufsz, hlprblknow, helperlen; 200 u8 *helperbuf; 201 u32 tx_len; 202 203 ret = request_firmware(&fw_helper, card->helper, 204 &card->func->dev); 205 if ((ret < 0) || !fw_helper) { 206 BT_ERR("request_firmware(helper) failed, error code = %d", 207 ret); 208 ret = -ENOENT; 209 goto done; 210 } 211 212 helper = fw_helper->data; 213 helperlen = fw_helper->size; 214 215 BT_DBG("Downloading helper image (%d bytes), block size %d bytes", 216 helperlen, SDIO_BLOCK_SIZE); 217 218 tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN); 219 220 tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL); 221 if (!tmphlprbuf) { 222 BT_ERR("Unable to allocate buffer for helper." 223 " Terminating download"); 224 ret = -ENOMEM; 225 goto done; 226 } 227 228 helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN); 229 230 /* Perform helper data transfer */ 231 tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE) 232 - SDIO_HEADER_LEN; 233 hlprblknow = 0; 234 235 do { 236 ret = btmrvl_sdio_poll_card_status(card, 237 CARD_IO_READY | DN_LD_CARD_RDY); 238 if (ret < 0) { 239 BT_ERR("Helper download poll status timeout @ %d", 240 hlprblknow); 241 goto done; 242 } 243 244 /* Check if there is more data? */ 245 if (hlprblknow >= helperlen) 246 break; 247 248 if (helperlen - hlprblknow < tx_len) 249 tx_len = helperlen - hlprblknow; 250 251 /* Little-endian */ 252 helperbuf[0] = ((tx_len & 0x000000ff) >> 0); 253 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8); 254 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16); 255 helperbuf[3] = ((tx_len & 0xff000000) >> 24); 256 257 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow], 258 tx_len); 259 260 /* Now send the data */ 261 ret = sdio_writesb(card->func, card->ioport, helperbuf, 262 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE); 263 if (ret < 0) { 264 BT_ERR("IO error during helper download @ %d", 265 hlprblknow); 266 goto done; 267 } 268 269 hlprblknow += tx_len; 270 } while (true); 271 272 BT_DBG("Transferring helper image EOF block"); 273 274 memset(helperbuf, 0x0, SDIO_BLOCK_SIZE); 275 276 ret = sdio_writesb(card->func, card->ioport, helperbuf, 277 SDIO_BLOCK_SIZE); 278 if (ret < 0) { 279 BT_ERR("IO error in writing helper image EOF block"); 280 goto done; 281 } 282 283 ret = 0; 284 285done: 286 kfree(tmphlprbuf); 287 if (fw_helper) 288 release_firmware(fw_helper); 289 290 return ret; 291} 292 293static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card) 294{ 295 const struct firmware *fw_firmware = NULL; 296 const u8 *firmware = NULL; 297 int firmwarelen, tmpfwbufsz, ret; 298 unsigned int tries, offset; 299 u8 base0, base1; 300 void *tmpfwbuf = NULL; 301 u8 *fwbuf; 302 u16 len; 303 int txlen = 0, tx_blocks = 0, count = 0; 304 305 ret = request_firmware(&fw_firmware, card->firmware, 306 &card->func->dev); 307 if ((ret < 0) || !fw_firmware) { 308 BT_ERR("request_firmware(firmware) failed, error code = %d", 309 ret); 310 ret = -ENOENT; 311 goto done; 312 } 313 314 firmware = fw_firmware->data; 315 firmwarelen = fw_firmware->size; 316 317 BT_DBG("Downloading FW image (%d bytes)", firmwarelen); 318 319 tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN); 320 tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL); 321 if (!tmpfwbuf) { 322 BT_ERR("Unable to allocate buffer for firmware." 323 " Terminating download"); 324 ret = -ENOMEM; 325 goto done; 326 } 327 328 /* Ensure aligned firmware buffer */ 329 fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN); 330 331 /* Perform firmware data transfer */ 332 offset = 0; 333 do { 334 ret = btmrvl_sdio_poll_card_status(card, 335 CARD_IO_READY | DN_LD_CARD_RDY); 336 if (ret < 0) { 337 BT_ERR("FW download with helper poll status" 338 " timeout @ %d", offset); 339 goto done; 340 } 341 342 /* Check if there is more data ? */ 343 if (offset >= firmwarelen) 344 break; 345 346 for (tries = 0; tries < MAX_POLL_TRIES; tries++) { 347 base0 = sdio_readb(card->func, 348 SQ_READ_BASE_ADDRESS_A0_REG, &ret); 349 if (ret) { 350 BT_ERR("BASE0 register read failed:" 351 " base0 = 0x%04X(%d)." 352 " Terminating download", 353 base0, base0); 354 ret = -EIO; 355 goto done; 356 } 357 base1 = sdio_readb(card->func, 358 SQ_READ_BASE_ADDRESS_A1_REG, &ret); 359 if (ret) { 360 BT_ERR("BASE1 register read failed:" 361 " base1 = 0x%04X(%d)." 362 " Terminating download", 363 base1, base1); 364 ret = -EIO; 365 goto done; 366 } 367 368 len = (((u16) base1) << 8) | base0; 369 if (len) 370 break; 371 372 udelay(10); 373 } 374 375 if (!len) 376 break; 377 else if (len > BTM_UPLD_SIZE) { 378 BT_ERR("FW download failure @%d, invalid length %d", 379 offset, len); 380 ret = -EINVAL; 381 goto done; 382 } 383 384 txlen = len; 385 386 if (len & BIT(0)) { 387 count++; 388 if (count > MAX_WRITE_IOMEM_RETRY) { 389 BT_ERR("FW download failure @%d, " 390 "over max retry count", offset); 391 ret = -EIO; 392 goto done; 393 } 394 BT_ERR("FW CRC error indicated by the helper: " 395 "len = 0x%04X, txlen = %d", len, txlen); 396 len &= ~BIT(0); 397 /* Set txlen to 0 so as to resend from same offset */ 398 txlen = 0; 399 } else { 400 count = 0; 401 402 /* Last block ? */ 403 if (firmwarelen - offset < txlen) 404 txlen = firmwarelen - offset; 405 406 tx_blocks = 407 (txlen + SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE; 408 409 memcpy(fwbuf, &firmware[offset], txlen); 410 } 411 412 ret = sdio_writesb(card->func, card->ioport, fwbuf, 413 tx_blocks * SDIO_BLOCK_SIZE); 414 415 if (ret < 0) { 416 BT_ERR("FW download, writesb(%d) failed @%d", 417 count, offset); 418 sdio_writeb(card->func, HOST_CMD53_FIN, CONFIG_REG, 419 &ret); 420 if (ret) 421 BT_ERR("writeb failed (CFG)"); 422 } 423 424 offset += txlen; 425 } while (true); 426 427 BT_DBG("FW download over, size %d bytes", offset); 428 429 ret = 0; 430 431done: 432 kfree(tmpfwbuf); 433 434 if (fw_firmware) 435 release_firmware(fw_firmware); 436 437 return ret; 438} 439 440static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv) 441{ 442 u16 buf_len = 0; 443 int ret, buf_block_len, blksz; 444 struct sk_buff *skb = NULL; 445 u32 type; 446 u8 *payload = NULL; 447 struct hci_dev *hdev = priv->btmrvl_dev.hcidev; 448 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 449 450 if (!card || !card->func) { 451 BT_ERR("card or function is NULL!"); 452 ret = -EINVAL; 453 goto exit; 454 } 455 456 /* Read the length of data to be transferred */ 457 ret = btmrvl_sdio_read_rx_len(card, &buf_len); 458 if (ret < 0) { 459 BT_ERR("read rx_len failed"); 460 ret = -EIO; 461 goto exit; 462 } 463 464 blksz = SDIO_BLOCK_SIZE; 465 buf_block_len = (buf_len + blksz - 1) / blksz; 466 467 if (buf_len <= SDIO_HEADER_LEN 468 || (buf_block_len * blksz) > ALLOC_BUF_SIZE) { 469 BT_ERR("invalid packet length: %d", buf_len); 470 ret = -EINVAL; 471 goto exit; 472 } 473 474 /* Allocate buffer */ 475 skb = bt_skb_alloc(buf_block_len * blksz + BTSDIO_DMA_ALIGN, 476 GFP_ATOMIC); 477 if (skb == NULL) { 478 BT_ERR("No free skb"); 479 goto exit; 480 } 481 482 if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) { 483 skb_put(skb, (unsigned long) skb->data & 484 (BTSDIO_DMA_ALIGN - 1)); 485 skb_pull(skb, (unsigned long) skb->data & 486 (BTSDIO_DMA_ALIGN - 1)); 487 } 488 489 payload = skb->data; 490 491 ret = sdio_readsb(card->func, payload, card->ioport, 492 buf_block_len * blksz); 493 if (ret < 0) { 494 BT_ERR("readsb failed: %d", ret); 495 ret = -EIO; 496 goto exit; 497 } 498 499 /* This is SDIO specific header length: byte[2][1][0], type: byte[3] 500 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor) 501 */ 502 503 buf_len = payload[0]; 504 buf_len |= (u16) payload[1] << 8; 505 type = payload[3]; 506 507 switch (type) { 508 case HCI_ACLDATA_PKT: 509 case HCI_SCODATA_PKT: 510 case HCI_EVENT_PKT: 511 bt_cb(skb)->pkt_type = type; 512 skb->dev = (void *)hdev; 513 skb_put(skb, buf_len); 514 skb_pull(skb, SDIO_HEADER_LEN); 515 516 if (type == HCI_EVENT_PKT) 517 btmrvl_check_evtpkt(priv, skb); 518 519 hci_recv_frame(skb); 520 hdev->stat.byte_rx += buf_len; 521 break; 522 523 case MRVL_VENDOR_PKT: 524 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT; 525 skb->dev = (void *)hdev; 526 skb_put(skb, buf_len); 527 skb_pull(skb, SDIO_HEADER_LEN); 528 529 if (btmrvl_process_event(priv, skb)) 530 hci_recv_frame(skb); 531 532 hdev->stat.byte_rx += buf_len; 533 break; 534 535 default: 536 BT_ERR("Unknown packet type:%d", type); 537 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, payload, 538 blksz * buf_block_len); 539 540 kfree_skb(skb); 541 skb = NULL; 542 break; 543 } 544 545exit: 546 if (ret) { 547 hdev->stat.err_rx++; 548 if (skb) 549 kfree_skb(skb); 550 } 551 552 return ret; 553} 554 555static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv) 556{ 557 ulong flags; 558 u8 ireg; 559 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 560 561 spin_lock_irqsave(&priv->driver_lock, flags); 562 ireg = sdio_ireg; 563 sdio_ireg = 0; 564 spin_unlock_irqrestore(&priv->driver_lock, flags); 565 566 sdio_claim_host(card->func); 567 if (ireg & DN_LD_HOST_INT_STATUS) { 568 if (priv->btmrvl_dev.tx_dnld_rdy) 569 BT_DBG("tx_done already received: " 570 " int_status=0x%x", ireg); 571 else 572 priv->btmrvl_dev.tx_dnld_rdy = true; 573 } 574 575 if (ireg & UP_LD_HOST_INT_STATUS) 576 btmrvl_sdio_card_to_host(priv); 577 578 sdio_release_host(card->func); 579 580 return 0; 581} 582 583static void btmrvl_sdio_interrupt(struct sdio_func *func) 584{ 585 struct btmrvl_private *priv; 586 struct btmrvl_sdio_card *card; 587 ulong flags; 588 u8 ireg = 0; 589 int ret; 590 591 card = sdio_get_drvdata(func); 592 if (!card || !card->priv) { 593 BT_ERR("sbi_interrupt(%p) card or priv is " 594 "NULL, card=%p\n", func, card); 595 return; 596 } 597 598 priv = card->priv; 599 600 ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret); 601 if (ret) { 602 BT_ERR("sdio_readb: read int status register failed"); 603 return; 604 } 605 606 if (ireg != 0) { 607 /* 608 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS 609 * Clear the interrupt status register and re-enable the 610 * interrupt. 611 */ 612 BT_DBG("ireg = 0x%x", ireg); 613 614 sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS | 615 UP_LD_HOST_INT_STATUS), 616 HOST_INTSTATUS_REG, &ret); 617 if (ret) { 618 BT_ERR("sdio_writeb: clear int status register failed"); 619 return; 620 } 621 } 622 623 spin_lock_irqsave(&priv->driver_lock, flags); 624 sdio_ireg |= ireg; 625 spin_unlock_irqrestore(&priv->driver_lock, flags); 626 627 btmrvl_interrupt(priv); 628} 629 630static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card) 631{ 632 struct sdio_func *func; 633 u8 reg; 634 int ret = 0; 635 636 if (!card || !card->func) { 637 BT_ERR("Error: card or function is NULL!"); 638 ret = -EINVAL; 639 goto failed; 640 } 641 642 func = card->func; 643 644 sdio_claim_host(func); 645 646 ret = sdio_enable_func(func); 647 if (ret) { 648 BT_ERR("sdio_enable_func() failed: ret=%d", ret); 649 ret = -EIO; 650 goto release_host; 651 } 652 653 ret = sdio_claim_irq(func, btmrvl_sdio_interrupt); 654 if (ret) { 655 BT_ERR("sdio_claim_irq failed: ret=%d", ret); 656 ret = -EIO; 657 goto disable_func; 658 } 659 660 ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE); 661 if (ret) { 662 BT_ERR("cannot set SDIO block size"); 663 ret = -EIO; 664 goto release_irq; 665 } 666 667 reg = sdio_readb(func, IO_PORT_0_REG, &ret); 668 if (ret < 0) { 669 ret = -EIO; 670 goto release_irq; 671 } 672 673 card->ioport = reg; 674 675 reg = sdio_readb(func, IO_PORT_1_REG, &ret); 676 if (ret < 0) { 677 ret = -EIO; 678 goto release_irq; 679 } 680 681 card->ioport |= (reg << 8); 682 683 reg = sdio_readb(func, IO_PORT_2_REG, &ret); 684 if (ret < 0) { 685 ret = -EIO; 686 goto release_irq; 687 } 688 689 card->ioport |= (reg << 16); 690 691 BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport); 692 693 sdio_set_drvdata(func, card); 694 695 sdio_release_host(func); 696 697 return 0; 698 699release_irq: 700 sdio_release_irq(func); 701 702disable_func: 703 sdio_disable_func(func); 704 705release_host: 706 sdio_release_host(func); 707 708failed: 709 return ret; 710} 711 712static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card) 713{ 714 if (card && card->func) { 715 sdio_claim_host(card->func); 716 sdio_release_irq(card->func); 717 sdio_disable_func(card->func); 718 sdio_release_host(card->func); 719 sdio_set_drvdata(card->func, NULL); 720 } 721 722 return 0; 723} 724 725static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card) 726{ 727 int ret; 728 729 if (!card || !card->func) 730 return -EINVAL; 731 732 sdio_claim_host(card->func); 733 734 ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE); 735 736 btmrvl_sdio_get_rx_unit(card); 737 738 sdio_release_host(card->func); 739 740 return ret; 741} 742 743static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card) 744{ 745 int ret; 746 747 if (!card || !card->func) 748 return -EINVAL; 749 750 sdio_claim_host(card->func); 751 752 ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE); 753 754 sdio_release_host(card->func); 755 756 return ret; 757} 758 759static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv, 760 u8 *payload, u16 nb) 761{ 762 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 763 int ret = 0; 764 int buf_block_len; 765 int blksz; 766 int i = 0; 767 u8 *buf = NULL; 768 void *tmpbuf = NULL; 769 int tmpbufsz; 770 771 if (!card || !card->func) { 772 BT_ERR("card or function is NULL!"); 773 return -EINVAL; 774 } 775 776 buf = payload; 777 if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) { 778 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN); 779 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL); 780 if (!tmpbuf) 781 return -ENOMEM; 782 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN); 783 memcpy(buf, payload, nb); 784 } 785 786 blksz = SDIO_BLOCK_SIZE; 787 buf_block_len = (nb + blksz - 1) / blksz; 788 789 sdio_claim_host(card->func); 790 791 do { 792 /* Transfer data to card */ 793 ret = sdio_writesb(card->func, card->ioport, buf, 794 buf_block_len * blksz); 795 if (ret < 0) { 796 i++; 797 BT_ERR("i=%d writesb failed: %d", i, ret); 798 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, 799 payload, nb); 800 ret = -EIO; 801 if (i > MAX_WRITE_IOMEM_RETRY) 802 goto exit; 803 } 804 } while (ret); 805 806 priv->btmrvl_dev.tx_dnld_rdy = false; 807 808exit: 809 sdio_release_host(card->func); 810 kfree(tmpbuf); 811 812 return ret; 813} 814 815static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card) 816{ 817 int ret = 0; 818 819 if (!card || !card->func) { 820 BT_ERR("card or function is NULL!"); 821 return -EINVAL; 822 } 823 sdio_claim_host(card->func); 824 825 if (!btmrvl_sdio_verify_fw_download(card, 1)) { 826 BT_DBG("Firmware already downloaded!"); 827 goto done; 828 } 829 830 ret = btmrvl_sdio_download_helper(card); 831 if (ret) { 832 BT_ERR("Failed to download helper!"); 833 ret = -EIO; 834 goto done; 835 } 836 837 if (btmrvl_sdio_download_fw_w_helper(card)) { 838 BT_ERR("Failed to download firmware!"); 839 ret = -EIO; 840 goto done; 841 } 842 843 if (btmrvl_sdio_verify_fw_download(card, MAX_POLL_TRIES)) { 844 BT_ERR("FW failed to be active in time!"); 845 ret = -ETIMEDOUT; 846 goto done; 847 } 848 849done: 850 sdio_release_host(card->func); 851 852 return ret; 853} 854 855static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv) 856{ 857 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 858 int ret = 0; 859 860 if (!card || !card->func) { 861 BT_ERR("card or function is NULL!"); 862 return -EINVAL; 863 } 864 865 sdio_claim_host(card->func); 866 867 sdio_writeb(card->func, HOST_POWER_UP, CONFIG_REG, &ret); 868 869 sdio_release_host(card->func); 870 871 BT_DBG("wake up firmware"); 872 873 return ret; 874} 875 876static int btmrvl_sdio_probe(struct sdio_func *func, 877 const struct sdio_device_id *id) 878{ 879 int ret = 0; 880 struct btmrvl_private *priv = NULL; 881 struct btmrvl_sdio_card *card = NULL; 882 883 BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d", 884 id->vendor, id->device, id->class, func->num); 885 886 card = kzalloc(sizeof(*card), GFP_KERNEL); 887 if (!card) { 888 ret = -ENOMEM; 889 goto done; 890 } 891 892 card->func = func; 893 894 if (id->driver_data) { 895 struct btmrvl_sdio_device *data = (void *) id->driver_data; 896 card->helper = data->helper; 897 card->firmware = data->firmware; 898 } 899 900 if (btmrvl_sdio_register_dev(card) < 0) { 901 BT_ERR("Failed to register BT device!"); 902 ret = -ENODEV; 903 goto free_card; 904 } 905 906 /* Disable the interrupts on the card */ 907 btmrvl_sdio_disable_host_int(card); 908 909 if (btmrvl_sdio_download_fw(card)) { 910 BT_ERR("Downloading firmware failed!"); 911 ret = -ENODEV; 912 goto unreg_dev; 913 } 914 915 msleep(100); 916 917 btmrvl_sdio_enable_host_int(card); 918 919 priv = btmrvl_add_card(card); 920 if (!priv) { 921 BT_ERR("Initializing card failed!"); 922 ret = -ENODEV; 923 goto disable_host_int; 924 } 925 926 card->priv = priv; 927 928 /* Initialize the interface specific function pointers */ 929 priv->hw_host_to_card = btmrvl_sdio_host_to_card; 930 priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw; 931 priv->hw_process_int_status = btmrvl_sdio_process_int_status; 932 933 if (btmrvl_register_hdev(priv)) { 934 BT_ERR("Register hdev failed!"); 935 ret = -ENODEV; 936 goto disable_host_int; 937 } 938 939 priv->btmrvl_dev.psmode = 1; 940 btmrvl_enable_ps(priv); 941 942 return 0; 943 944disable_host_int: 945 btmrvl_sdio_disable_host_int(card); 946unreg_dev: 947 btmrvl_sdio_unregister_dev(card); 948free_card: 949 kfree(card); 950done: 951 return ret; 952} 953 954static void btmrvl_sdio_remove(struct sdio_func *func) 955{ 956 struct btmrvl_sdio_card *card; 957 958 if (func) { 959 card = sdio_get_drvdata(func); 960 if (card) { 961 /* Send SHUTDOWN command & disable interrupt 962 * if user removes the module. 963 */ 964 if (user_rmmod) { 965 btmrvl_send_module_cfg_cmd(card->priv, 966 MODULE_SHUTDOWN_REQ); 967 btmrvl_sdio_disable_host_int(card); 968 } 969 BT_DBG("unregester dev"); 970 btmrvl_sdio_unregister_dev(card); 971 btmrvl_remove_card(card->priv); 972 kfree(card); 973 } 974 } 975} 976 977static struct sdio_driver bt_mrvl_sdio = { 978 .name = "btmrvl_sdio", 979 .id_table = btmrvl_sdio_ids, 980 .probe = btmrvl_sdio_probe, 981 .remove = btmrvl_sdio_remove, 982}; 983 984static int __init btmrvl_sdio_init_module(void) 985{ 986 if (sdio_register_driver(&bt_mrvl_sdio) != 0) { 987 BT_ERR("SDIO Driver Registration Failed"); 988 return -ENODEV; 989 } 990 991 /* Clear the flag in case user removes the card. */ 992 user_rmmod = 0; 993 994 return 0; 995} 996 997static void __exit btmrvl_sdio_exit_module(void) 998{ 999 /* Set the flag as user is removing this module. */ 1000 user_rmmod = 1; 1001 1002 sdio_unregister_driver(&bt_mrvl_sdio); 1003} 1004 1005module_init(btmrvl_sdio_init_module); 1006module_exit(btmrvl_sdio_exit_module); 1007 1008MODULE_AUTHOR("Marvell International Ltd."); 1009MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION); 1010MODULE_VERSION(VERSION); 1011MODULE_LICENSE("GPL v2"); 1012MODULE_FIRMWARE("sd8688_helper.bin"); 1013MODULE_FIRMWARE("sd8688.bin"); 1014