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 #include <linux/module.h> 27 28 #include <net/bluetooth/bluetooth.h> 29 #include <net/bluetooth/hci_core.h> 30 31 #include "btmrvl_drv.h" 32 #include "btmrvl_sdio.h" 33 34 #define VERSION "1.0" 35 36 /* The btmrvl_sdio_remove() callback function is called 37 * when user removes this module from kernel space or ejects 38 * the card from the slot. The driver handles these 2 cases 39 * differently. 40 * If the user is removing the module, a MODULE_SHUTDOWN_REQ 41 * command is sent to firmware and interrupt will be disabled. 42 * If the card is removed, there is no need to send command 43 * or disable interrupt. 44 * 45 * The variable 'user_rmmod' is used to distinguish these two 46 * scenarios. This flag is initialized as FALSE in case the card 47 * is removed, and will be set to TRUE for module removal when 48 * module_exit function is called. 49 */ 50 static u8 user_rmmod; 51 static u8 sdio_ireg; 52 53 static const struct btmrvl_sdio_card_reg btmrvl_reg_8688 = { 54 .cfg = 0x03, 55 .host_int_mask = 0x04, 56 .host_intstatus = 0x05, 57 .card_status = 0x20, 58 .sq_read_base_addr_a0 = 0x10, 59 .sq_read_base_addr_a1 = 0x11, 60 .card_fw_status0 = 0x40, 61 .card_fw_status1 = 0x41, 62 .card_rx_len = 0x42, 63 .card_rx_unit = 0x43, 64 .io_port_0 = 0x00, 65 .io_port_1 = 0x01, 66 .io_port_2 = 0x02, 67 }; 68 static const struct btmrvl_sdio_card_reg btmrvl_reg_87xx = { 69 .cfg = 0x00, 70 .host_int_mask = 0x02, 71 .host_intstatus = 0x03, 72 .card_status = 0x30, 73 .sq_read_base_addr_a0 = 0x40, 74 .sq_read_base_addr_a1 = 0x41, 75 .card_revision = 0x5c, 76 .card_fw_status0 = 0x60, 77 .card_fw_status1 = 0x61, 78 .card_rx_len = 0x62, 79 .card_rx_unit = 0x63, 80 .io_port_0 = 0x78, 81 .io_port_1 = 0x79, 82 .io_port_2 = 0x7a, 83 }; 84 85 static const struct btmrvl_sdio_card_reg btmrvl_reg_88xx = { 86 .cfg = 0x00, 87 .host_int_mask = 0x02, 88 .host_intstatus = 0x03, 89 .card_status = 0x50, 90 .sq_read_base_addr_a0 = 0x60, 91 .sq_read_base_addr_a1 = 0x61, 92 .card_revision = 0xbc, 93 .card_fw_status0 = 0xc0, 94 .card_fw_status1 = 0xc1, 95 .card_rx_len = 0xc2, 96 .card_rx_unit = 0xc3, 97 .io_port_0 = 0xd8, 98 .io_port_1 = 0xd9, 99 .io_port_2 = 0xda, 100 }; 101 102 static const struct btmrvl_sdio_device btmrvl_sdio_sd8688 = { 103 .helper = "mrvl/sd8688_helper.bin", 104 .firmware = "mrvl/sd8688.bin", 105 .reg = &btmrvl_reg_8688, 106 .sd_blksz_fw_dl = 64, 107 }; 108 109 static const struct btmrvl_sdio_device btmrvl_sdio_sd8787 = { 110 .helper = NULL, 111 .firmware = "mrvl/sd8787_uapsta.bin", 112 .reg = &btmrvl_reg_87xx, 113 .sd_blksz_fw_dl = 256, 114 }; 115 116 static const struct btmrvl_sdio_device btmrvl_sdio_sd8797 = { 117 .helper = NULL, 118 .firmware = "mrvl/sd8797_uapsta.bin", 119 .reg = &btmrvl_reg_87xx, 120 .sd_blksz_fw_dl = 256, 121 }; 122 123 static const struct btmrvl_sdio_device btmrvl_sdio_sd8897 = { 124 .helper = NULL, 125 .firmware = "mrvl/sd8897_uapsta.bin", 126 .reg = &btmrvl_reg_88xx, 127 .sd_blksz_fw_dl = 256, 128 }; 129 130 static const struct sdio_device_id btmrvl_sdio_ids[] = { 131 /* Marvell SD8688 Bluetooth device */ 132 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x9105), 133 .driver_data = (unsigned long) &btmrvl_sdio_sd8688 }, 134 /* Marvell SD8787 Bluetooth device */ 135 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911A), 136 .driver_data = (unsigned long) &btmrvl_sdio_sd8787 }, 137 /* Marvell SD8787 Bluetooth AMP device */ 138 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x911B), 139 .driver_data = (unsigned long) &btmrvl_sdio_sd8787 }, 140 /* Marvell SD8797 Bluetooth device */ 141 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912A), 142 .driver_data = (unsigned long) &btmrvl_sdio_sd8797 }, 143 /* Marvell SD8897 Bluetooth device */ 144 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, 0x912E), 145 .driver_data = (unsigned long) &btmrvl_sdio_sd8897 }, 146 147 { } /* Terminating entry */ 148 }; 149 150 MODULE_DEVICE_TABLE(sdio, btmrvl_sdio_ids); 151 152 static int btmrvl_sdio_get_rx_unit(struct btmrvl_sdio_card *card) 153 { 154 u8 reg; 155 int ret; 156 157 reg = sdio_readb(card->func, card->reg->card_rx_unit, &ret); 158 if (!ret) 159 card->rx_unit = reg; 160 161 return ret; 162 } 163 164 static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat) 165 { 166 u8 fws0, fws1; 167 int ret; 168 169 *dat = 0; 170 171 fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret); 172 if (ret) 173 return -EIO; 174 175 fws1 = sdio_readb(card->func, card->reg->card_fw_status1, &ret); 176 if (ret) 177 return -EIO; 178 179 *dat = (((u16) fws1) << 8) | fws0; 180 181 return 0; 182 } 183 184 static int btmrvl_sdio_read_rx_len(struct btmrvl_sdio_card *card, u16 *dat) 185 { 186 u8 reg; 187 int ret; 188 189 reg = sdio_readb(card->func, card->reg->card_rx_len, &ret); 190 if (!ret) 191 *dat = (u16) reg << card->rx_unit; 192 193 return ret; 194 } 195 196 static int btmrvl_sdio_enable_host_int_mask(struct btmrvl_sdio_card *card, 197 u8 mask) 198 { 199 int ret; 200 201 sdio_writeb(card->func, mask, card->reg->host_int_mask, &ret); 202 if (ret) { 203 BT_ERR("Unable to enable the host interrupt!"); 204 ret = -EIO; 205 } 206 207 return ret; 208 } 209 210 static int btmrvl_sdio_disable_host_int_mask(struct btmrvl_sdio_card *card, 211 u8 mask) 212 { 213 u8 host_int_mask; 214 int ret; 215 216 host_int_mask = sdio_readb(card->func, card->reg->host_int_mask, &ret); 217 if (ret) 218 return -EIO; 219 220 host_int_mask &= ~mask; 221 222 sdio_writeb(card->func, host_int_mask, card->reg->host_int_mask, &ret); 223 if (ret < 0) { 224 BT_ERR("Unable to disable the host interrupt!"); 225 return -EIO; 226 } 227 228 return 0; 229 } 230 231 static int btmrvl_sdio_poll_card_status(struct btmrvl_sdio_card *card, u8 bits) 232 { 233 unsigned int tries; 234 u8 status; 235 int ret; 236 237 for (tries = 0; tries < MAX_POLL_TRIES * 1000; tries++) { 238 status = sdio_readb(card->func, card->reg->card_status, &ret); 239 if (ret) 240 goto failed; 241 if ((status & bits) == bits) 242 return ret; 243 244 udelay(1); 245 } 246 247 ret = -ETIMEDOUT; 248 249 failed: 250 BT_ERR("FAILED! ret=%d", ret); 251 252 return ret; 253 } 254 255 static int btmrvl_sdio_verify_fw_download(struct btmrvl_sdio_card *card, 256 int pollnum) 257 { 258 u16 firmwarestat; 259 int tries, ret; 260 261 /* Wait for firmware to become ready */ 262 for (tries = 0; tries < pollnum; tries++) { 263 sdio_claim_host(card->func); 264 ret = btmrvl_sdio_read_fw_status(card, &firmwarestat); 265 sdio_release_host(card->func); 266 if (ret < 0) 267 continue; 268 269 if (firmwarestat == FIRMWARE_READY) 270 return 0; 271 272 msleep(10); 273 } 274 275 return -ETIMEDOUT; 276 } 277 278 static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card) 279 { 280 const struct firmware *fw_helper = NULL; 281 const u8 *helper = NULL; 282 int ret; 283 void *tmphlprbuf = NULL; 284 int tmphlprbufsz, hlprblknow, helperlen; 285 u8 *helperbuf; 286 u32 tx_len; 287 288 ret = request_firmware(&fw_helper, card->helper, 289 &card->func->dev); 290 if ((ret < 0) || !fw_helper) { 291 BT_ERR("request_firmware(helper) failed, error code = %d", 292 ret); 293 ret = -ENOENT; 294 goto done; 295 } 296 297 helper = fw_helper->data; 298 helperlen = fw_helper->size; 299 300 BT_DBG("Downloading helper image (%d bytes), block size %d bytes", 301 helperlen, SDIO_BLOCK_SIZE); 302 303 tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN); 304 305 tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL); 306 if (!tmphlprbuf) { 307 BT_ERR("Unable to allocate buffer for helper." 308 " Terminating download"); 309 ret = -ENOMEM; 310 goto done; 311 } 312 313 helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN); 314 315 /* Perform helper data transfer */ 316 tx_len = (FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE) 317 - SDIO_HEADER_LEN; 318 hlprblknow = 0; 319 320 do { 321 ret = btmrvl_sdio_poll_card_status(card, 322 CARD_IO_READY | DN_LD_CARD_RDY); 323 if (ret < 0) { 324 BT_ERR("Helper download poll status timeout @ %d", 325 hlprblknow); 326 goto done; 327 } 328 329 /* Check if there is more data? */ 330 if (hlprblknow >= helperlen) 331 break; 332 333 if (helperlen - hlprblknow < tx_len) 334 tx_len = helperlen - hlprblknow; 335 336 /* Little-endian */ 337 helperbuf[0] = ((tx_len & 0x000000ff) >> 0); 338 helperbuf[1] = ((tx_len & 0x0000ff00) >> 8); 339 helperbuf[2] = ((tx_len & 0x00ff0000) >> 16); 340 helperbuf[3] = ((tx_len & 0xff000000) >> 24); 341 342 memcpy(&helperbuf[SDIO_HEADER_LEN], &helper[hlprblknow], 343 tx_len); 344 345 /* Now send the data */ 346 ret = sdio_writesb(card->func, card->ioport, helperbuf, 347 FIRMWARE_TRANSFER_NBLOCK * SDIO_BLOCK_SIZE); 348 if (ret < 0) { 349 BT_ERR("IO error during helper download @ %d", 350 hlprblknow); 351 goto done; 352 } 353 354 hlprblknow += tx_len; 355 } while (true); 356 357 BT_DBG("Transferring helper image EOF block"); 358 359 memset(helperbuf, 0x0, SDIO_BLOCK_SIZE); 360 361 ret = sdio_writesb(card->func, card->ioport, helperbuf, 362 SDIO_BLOCK_SIZE); 363 if (ret < 0) { 364 BT_ERR("IO error in writing helper image EOF block"); 365 goto done; 366 } 367 368 ret = 0; 369 370 done: 371 kfree(tmphlprbuf); 372 release_firmware(fw_helper); 373 return ret; 374 } 375 376 static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card) 377 { 378 const struct firmware *fw_firmware = NULL; 379 const u8 *firmware = NULL; 380 int firmwarelen, tmpfwbufsz, ret; 381 unsigned int tries, offset; 382 u8 base0, base1; 383 void *tmpfwbuf = NULL; 384 u8 *fwbuf; 385 u16 len, blksz_dl = card->sd_blksz_fw_dl; 386 int txlen = 0, tx_blocks = 0, count = 0; 387 388 ret = request_firmware(&fw_firmware, card->firmware, 389 &card->func->dev); 390 if ((ret < 0) || !fw_firmware) { 391 BT_ERR("request_firmware(firmware) failed, error code = %d", 392 ret); 393 ret = -ENOENT; 394 goto done; 395 } 396 397 firmware = fw_firmware->data; 398 firmwarelen = fw_firmware->size; 399 400 BT_DBG("Downloading FW image (%d bytes)", firmwarelen); 401 402 tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN); 403 tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL); 404 if (!tmpfwbuf) { 405 BT_ERR("Unable to allocate buffer for firmware." 406 " Terminating download"); 407 ret = -ENOMEM; 408 goto done; 409 } 410 411 /* Ensure aligned firmware buffer */ 412 fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN); 413 414 /* Perform firmware data transfer */ 415 offset = 0; 416 do { 417 ret = btmrvl_sdio_poll_card_status(card, 418 CARD_IO_READY | DN_LD_CARD_RDY); 419 if (ret < 0) { 420 BT_ERR("FW download with helper poll status" 421 " timeout @ %d", offset); 422 goto done; 423 } 424 425 /* Check if there is more data ? */ 426 if (offset >= firmwarelen) 427 break; 428 429 for (tries = 0; tries < MAX_POLL_TRIES; tries++) { 430 base0 = sdio_readb(card->func, 431 card->reg->sq_read_base_addr_a0, &ret); 432 if (ret) { 433 BT_ERR("BASE0 register read failed:" 434 " base0 = 0x%04X(%d)." 435 " Terminating download", 436 base0, base0); 437 ret = -EIO; 438 goto done; 439 } 440 base1 = sdio_readb(card->func, 441 card->reg->sq_read_base_addr_a1, &ret); 442 if (ret) { 443 BT_ERR("BASE1 register read failed:" 444 " base1 = 0x%04X(%d)." 445 " Terminating download", 446 base1, base1); 447 ret = -EIO; 448 goto done; 449 } 450 451 len = (((u16) base1) << 8) | base0; 452 if (len) 453 break; 454 455 udelay(10); 456 } 457 458 if (!len) 459 break; 460 else if (len > BTM_UPLD_SIZE) { 461 BT_ERR("FW download failure @%d, invalid length %d", 462 offset, len); 463 ret = -EINVAL; 464 goto done; 465 } 466 467 txlen = len; 468 469 if (len & BIT(0)) { 470 count++; 471 if (count > MAX_WRITE_IOMEM_RETRY) { 472 BT_ERR("FW download failure @%d, " 473 "over max retry count", offset); 474 ret = -EIO; 475 goto done; 476 } 477 BT_ERR("FW CRC error indicated by the helper: " 478 "len = 0x%04X, txlen = %d", len, txlen); 479 len &= ~BIT(0); 480 /* Set txlen to 0 so as to resend from same offset */ 481 txlen = 0; 482 } else { 483 count = 0; 484 485 /* Last block ? */ 486 if (firmwarelen - offset < txlen) 487 txlen = firmwarelen - offset; 488 489 tx_blocks = DIV_ROUND_UP(txlen, blksz_dl); 490 491 memcpy(fwbuf, &firmware[offset], txlen); 492 } 493 494 ret = sdio_writesb(card->func, card->ioport, fwbuf, 495 tx_blocks * blksz_dl); 496 497 if (ret < 0) { 498 BT_ERR("FW download, writesb(%d) failed @%d", 499 count, offset); 500 sdio_writeb(card->func, HOST_CMD53_FIN, 501 card->reg->cfg, &ret); 502 if (ret) 503 BT_ERR("writeb failed (CFG)"); 504 } 505 506 offset += txlen; 507 } while (true); 508 509 BT_DBG("FW download over, size %d bytes", offset); 510 511 ret = 0; 512 513 done: 514 kfree(tmpfwbuf); 515 release_firmware(fw_firmware); 516 return ret; 517 } 518 519 static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv) 520 { 521 u16 buf_len = 0; 522 int ret, num_blocks, blksz; 523 struct sk_buff *skb = NULL; 524 u32 type; 525 u8 *payload = NULL; 526 struct hci_dev *hdev = priv->btmrvl_dev.hcidev; 527 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 528 529 if (!card || !card->func) { 530 BT_ERR("card or function is NULL!"); 531 ret = -EINVAL; 532 goto exit; 533 } 534 535 /* Read the length of data to be transferred */ 536 ret = btmrvl_sdio_read_rx_len(card, &buf_len); 537 if (ret < 0) { 538 BT_ERR("read rx_len failed"); 539 ret = -EIO; 540 goto exit; 541 } 542 543 blksz = SDIO_BLOCK_SIZE; 544 num_blocks = DIV_ROUND_UP(buf_len, blksz); 545 546 if (buf_len <= SDIO_HEADER_LEN 547 || (num_blocks * blksz) > ALLOC_BUF_SIZE) { 548 BT_ERR("invalid packet length: %d", buf_len); 549 ret = -EINVAL; 550 goto exit; 551 } 552 553 /* Allocate buffer */ 554 skb = bt_skb_alloc(num_blocks * blksz + BTSDIO_DMA_ALIGN, GFP_ATOMIC); 555 if (skb == NULL) { 556 BT_ERR("No free skb"); 557 ret = -ENOMEM; 558 goto exit; 559 } 560 561 if ((unsigned long) skb->data & (BTSDIO_DMA_ALIGN - 1)) { 562 skb_put(skb, (unsigned long) skb->data & 563 (BTSDIO_DMA_ALIGN - 1)); 564 skb_pull(skb, (unsigned long) skb->data & 565 (BTSDIO_DMA_ALIGN - 1)); 566 } 567 568 payload = skb->data; 569 570 ret = sdio_readsb(card->func, payload, card->ioport, 571 num_blocks * blksz); 572 if (ret < 0) { 573 BT_ERR("readsb failed: %d", ret); 574 ret = -EIO; 575 goto exit; 576 } 577 578 /* This is SDIO specific header length: byte[2][1][0], type: byte[3] 579 * (HCI_COMMAND = 1, ACL_DATA = 2, SCO_DATA = 3, 0xFE = Vendor) 580 */ 581 582 buf_len = payload[0]; 583 buf_len |= payload[1] << 8; 584 buf_len |= payload[2] << 16; 585 586 if (buf_len > blksz * num_blocks) { 587 BT_ERR("Skip incorrect packet: hdrlen %d buffer %d", 588 buf_len, blksz * num_blocks); 589 ret = -EIO; 590 goto exit; 591 } 592 593 type = payload[3]; 594 595 switch (type) { 596 case HCI_ACLDATA_PKT: 597 case HCI_SCODATA_PKT: 598 case HCI_EVENT_PKT: 599 bt_cb(skb)->pkt_type = type; 600 skb_put(skb, buf_len); 601 skb_pull(skb, SDIO_HEADER_LEN); 602 603 if (type == HCI_EVENT_PKT) { 604 if (btmrvl_check_evtpkt(priv, skb)) 605 hci_recv_frame(hdev, skb); 606 } else { 607 hci_recv_frame(hdev, skb); 608 } 609 610 hdev->stat.byte_rx += buf_len; 611 break; 612 613 case MRVL_VENDOR_PKT: 614 bt_cb(skb)->pkt_type = HCI_VENDOR_PKT; 615 skb_put(skb, buf_len); 616 skb_pull(skb, SDIO_HEADER_LEN); 617 618 if (btmrvl_process_event(priv, skb)) 619 hci_recv_frame(hdev, skb); 620 621 hdev->stat.byte_rx += buf_len; 622 break; 623 624 default: 625 BT_ERR("Unknown packet type:%d", type); 626 BT_ERR("hex: %*ph", blksz * num_blocks, payload); 627 628 kfree_skb(skb); 629 skb = NULL; 630 break; 631 } 632 633 exit: 634 if (ret) { 635 hdev->stat.err_rx++; 636 kfree_skb(skb); 637 } 638 639 return ret; 640 } 641 642 static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv) 643 { 644 ulong flags; 645 u8 ireg; 646 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 647 648 spin_lock_irqsave(&priv->driver_lock, flags); 649 ireg = sdio_ireg; 650 sdio_ireg = 0; 651 spin_unlock_irqrestore(&priv->driver_lock, flags); 652 653 sdio_claim_host(card->func); 654 if (ireg & DN_LD_HOST_INT_STATUS) { 655 if (priv->btmrvl_dev.tx_dnld_rdy) 656 BT_DBG("tx_done already received: " 657 " int_status=0x%x", ireg); 658 else 659 priv->btmrvl_dev.tx_dnld_rdy = true; 660 } 661 662 if (ireg & UP_LD_HOST_INT_STATUS) 663 btmrvl_sdio_card_to_host(priv); 664 665 sdio_release_host(card->func); 666 667 return 0; 668 } 669 670 static void btmrvl_sdio_interrupt(struct sdio_func *func) 671 { 672 struct btmrvl_private *priv; 673 struct btmrvl_sdio_card *card; 674 ulong flags; 675 u8 ireg = 0; 676 int ret; 677 678 card = sdio_get_drvdata(func); 679 if (!card || !card->priv) { 680 BT_ERR("sbi_interrupt(%p) card or priv is " 681 "NULL, card=%p\n", func, card); 682 return; 683 } 684 685 priv = card->priv; 686 687 ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret); 688 if (ret) { 689 BT_ERR("sdio_readb: read int status register failed"); 690 return; 691 } 692 693 if (ireg != 0) { 694 /* 695 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS 696 * Clear the interrupt status register and re-enable the 697 * interrupt. 698 */ 699 BT_DBG("ireg = 0x%x", ireg); 700 701 sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS | 702 UP_LD_HOST_INT_STATUS), 703 card->reg->host_intstatus, &ret); 704 if (ret) { 705 BT_ERR("sdio_writeb: clear int status register failed"); 706 return; 707 } 708 } 709 710 spin_lock_irqsave(&priv->driver_lock, flags); 711 sdio_ireg |= ireg; 712 spin_unlock_irqrestore(&priv->driver_lock, flags); 713 714 btmrvl_interrupt(priv); 715 } 716 717 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card) 718 { 719 struct sdio_func *func; 720 u8 reg; 721 int ret = 0; 722 723 if (!card || !card->func) { 724 BT_ERR("Error: card or function is NULL!"); 725 ret = -EINVAL; 726 goto failed; 727 } 728 729 func = card->func; 730 731 sdio_claim_host(func); 732 733 ret = sdio_enable_func(func); 734 if (ret) { 735 BT_ERR("sdio_enable_func() failed: ret=%d", ret); 736 ret = -EIO; 737 goto release_host; 738 } 739 740 ret = sdio_claim_irq(func, btmrvl_sdio_interrupt); 741 if (ret) { 742 BT_ERR("sdio_claim_irq failed: ret=%d", ret); 743 ret = -EIO; 744 goto disable_func; 745 } 746 747 ret = sdio_set_block_size(card->func, SDIO_BLOCK_SIZE); 748 if (ret) { 749 BT_ERR("cannot set SDIO block size"); 750 ret = -EIO; 751 goto release_irq; 752 } 753 754 reg = sdio_readb(func, card->reg->io_port_0, &ret); 755 if (ret < 0) { 756 ret = -EIO; 757 goto release_irq; 758 } 759 760 card->ioport = reg; 761 762 reg = sdio_readb(func, card->reg->io_port_1, &ret); 763 if (ret < 0) { 764 ret = -EIO; 765 goto release_irq; 766 } 767 768 card->ioport |= (reg << 8); 769 770 reg = sdio_readb(func, card->reg->io_port_2, &ret); 771 if (ret < 0) { 772 ret = -EIO; 773 goto release_irq; 774 } 775 776 card->ioport |= (reg << 16); 777 778 BT_DBG("SDIO FUNC%d IO port: 0x%x", func->num, card->ioport); 779 780 sdio_set_drvdata(func, card); 781 782 sdio_release_host(func); 783 784 return 0; 785 786 release_irq: 787 sdio_release_irq(func); 788 789 disable_func: 790 sdio_disable_func(func); 791 792 release_host: 793 sdio_release_host(func); 794 795 failed: 796 return ret; 797 } 798 799 static int btmrvl_sdio_unregister_dev(struct btmrvl_sdio_card *card) 800 { 801 if (card && card->func) { 802 sdio_claim_host(card->func); 803 sdio_release_irq(card->func); 804 sdio_disable_func(card->func); 805 sdio_release_host(card->func); 806 sdio_set_drvdata(card->func, NULL); 807 } 808 809 return 0; 810 } 811 812 static int btmrvl_sdio_enable_host_int(struct btmrvl_sdio_card *card) 813 { 814 int ret; 815 816 if (!card || !card->func) 817 return -EINVAL; 818 819 sdio_claim_host(card->func); 820 821 ret = btmrvl_sdio_enable_host_int_mask(card, HIM_ENABLE); 822 823 btmrvl_sdio_get_rx_unit(card); 824 825 sdio_release_host(card->func); 826 827 return ret; 828 } 829 830 static int btmrvl_sdio_disable_host_int(struct btmrvl_sdio_card *card) 831 { 832 int ret; 833 834 if (!card || !card->func) 835 return -EINVAL; 836 837 sdio_claim_host(card->func); 838 839 ret = btmrvl_sdio_disable_host_int_mask(card, HIM_DISABLE); 840 841 sdio_release_host(card->func); 842 843 return ret; 844 } 845 846 static int btmrvl_sdio_host_to_card(struct btmrvl_private *priv, 847 u8 *payload, u16 nb) 848 { 849 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 850 int ret = 0; 851 int buf_block_len; 852 int blksz; 853 int i = 0; 854 u8 *buf = NULL; 855 void *tmpbuf = NULL; 856 int tmpbufsz; 857 858 if (!card || !card->func) { 859 BT_ERR("card or function is NULL!"); 860 return -EINVAL; 861 } 862 863 buf = payload; 864 if ((unsigned long) payload & (BTSDIO_DMA_ALIGN - 1)) { 865 tmpbufsz = ALIGN_SZ(nb, BTSDIO_DMA_ALIGN); 866 tmpbuf = kzalloc(tmpbufsz, GFP_KERNEL); 867 if (!tmpbuf) 868 return -ENOMEM; 869 buf = (u8 *) ALIGN_ADDR(tmpbuf, BTSDIO_DMA_ALIGN); 870 memcpy(buf, payload, nb); 871 } 872 873 blksz = SDIO_BLOCK_SIZE; 874 buf_block_len = DIV_ROUND_UP(nb, blksz); 875 876 sdio_claim_host(card->func); 877 878 do { 879 /* Transfer data to card */ 880 ret = sdio_writesb(card->func, card->ioport, buf, 881 buf_block_len * blksz); 882 if (ret < 0) { 883 i++; 884 BT_ERR("i=%d writesb failed: %d", i, ret); 885 BT_ERR("hex: %*ph", nb, payload); 886 ret = -EIO; 887 if (i > MAX_WRITE_IOMEM_RETRY) 888 goto exit; 889 } 890 } while (ret); 891 892 priv->btmrvl_dev.tx_dnld_rdy = false; 893 894 exit: 895 sdio_release_host(card->func); 896 kfree(tmpbuf); 897 898 return ret; 899 } 900 901 static int btmrvl_sdio_download_fw(struct btmrvl_sdio_card *card) 902 { 903 int ret; 904 u8 fws0; 905 int pollnum = MAX_POLL_TRIES; 906 907 if (!card || !card->func) { 908 BT_ERR("card or function is NULL!"); 909 return -EINVAL; 910 } 911 912 if (!btmrvl_sdio_verify_fw_download(card, 1)) { 913 BT_DBG("Firmware already downloaded!"); 914 return 0; 915 } 916 917 sdio_claim_host(card->func); 918 919 /* Check if other function driver is downloading the firmware */ 920 fws0 = sdio_readb(card->func, card->reg->card_fw_status0, &ret); 921 if (ret) { 922 BT_ERR("Failed to read FW downloading status!"); 923 ret = -EIO; 924 goto done; 925 } 926 if (fws0) { 927 BT_DBG("BT not the winner (%#x). Skip FW downloading", fws0); 928 929 /* Give other function more time to download the firmware */ 930 pollnum *= 10; 931 } else { 932 if (card->helper) { 933 ret = btmrvl_sdio_download_helper(card); 934 if (ret) { 935 BT_ERR("Failed to download helper!"); 936 ret = -EIO; 937 goto done; 938 } 939 } 940 941 if (btmrvl_sdio_download_fw_w_helper(card)) { 942 BT_ERR("Failed to download firmware!"); 943 ret = -EIO; 944 goto done; 945 } 946 } 947 948 sdio_release_host(card->func); 949 950 /* 951 * winner or not, with this test the FW synchronizes when the 952 * module can continue its initialization 953 */ 954 if (btmrvl_sdio_verify_fw_download(card, pollnum)) { 955 BT_ERR("FW failed to be active in time!"); 956 return -ETIMEDOUT; 957 } 958 959 return 0; 960 961 done: 962 sdio_release_host(card->func); 963 return ret; 964 } 965 966 static int btmrvl_sdio_wakeup_fw(struct btmrvl_private *priv) 967 { 968 struct btmrvl_sdio_card *card = priv->btmrvl_dev.card; 969 int ret = 0; 970 971 if (!card || !card->func) { 972 BT_ERR("card or function is NULL!"); 973 return -EINVAL; 974 } 975 976 sdio_claim_host(card->func); 977 978 sdio_writeb(card->func, HOST_POWER_UP, card->reg->cfg, &ret); 979 980 sdio_release_host(card->func); 981 982 BT_DBG("wake up firmware"); 983 984 return ret; 985 } 986 987 static int btmrvl_sdio_probe(struct sdio_func *func, 988 const struct sdio_device_id *id) 989 { 990 int ret = 0; 991 struct btmrvl_private *priv = NULL; 992 struct btmrvl_sdio_card *card = NULL; 993 994 BT_INFO("vendor=0x%x, device=0x%x, class=%d, fn=%d", 995 id->vendor, id->device, id->class, func->num); 996 997 card = devm_kzalloc(&func->dev, sizeof(*card), GFP_KERNEL); 998 if (!card) 999 return -ENOMEM; 1000 1001 card->func = func; 1002 1003 if (id->driver_data) { 1004 struct btmrvl_sdio_device *data = (void *) id->driver_data; 1005 card->helper = data->helper; 1006 card->firmware = data->firmware; 1007 card->reg = data->reg; 1008 card->sd_blksz_fw_dl = data->sd_blksz_fw_dl; 1009 } 1010 1011 if (btmrvl_sdio_register_dev(card) < 0) { 1012 BT_ERR("Failed to register BT device!"); 1013 return -ENODEV; 1014 } 1015 1016 /* Disable the interrupts on the card */ 1017 btmrvl_sdio_disable_host_int(card); 1018 1019 if (btmrvl_sdio_download_fw(card)) { 1020 BT_ERR("Downloading firmware failed!"); 1021 ret = -ENODEV; 1022 goto unreg_dev; 1023 } 1024 1025 btmrvl_sdio_enable_host_int(card); 1026 1027 priv = btmrvl_add_card(card); 1028 if (!priv) { 1029 BT_ERR("Initializing card failed!"); 1030 ret = -ENODEV; 1031 goto disable_host_int; 1032 } 1033 1034 card->priv = priv; 1035 1036 /* Initialize the interface specific function pointers */ 1037 priv->hw_host_to_card = btmrvl_sdio_host_to_card; 1038 priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw; 1039 priv->hw_process_int_status = btmrvl_sdio_process_int_status; 1040 1041 if (btmrvl_register_hdev(priv)) { 1042 BT_ERR("Register hdev failed!"); 1043 ret = -ENODEV; 1044 goto disable_host_int; 1045 } 1046 1047 return 0; 1048 1049 disable_host_int: 1050 btmrvl_sdio_disable_host_int(card); 1051 unreg_dev: 1052 btmrvl_sdio_unregister_dev(card); 1053 return ret; 1054 } 1055 1056 static void btmrvl_sdio_remove(struct sdio_func *func) 1057 { 1058 struct btmrvl_sdio_card *card; 1059 1060 if (func) { 1061 card = sdio_get_drvdata(func); 1062 if (card) { 1063 /* Send SHUTDOWN command & disable interrupt 1064 * if user removes the module. 1065 */ 1066 if (user_rmmod) { 1067 btmrvl_send_module_cfg_cmd(card->priv, 1068 MODULE_SHUTDOWN_REQ); 1069 btmrvl_sdio_disable_host_int(card); 1070 } 1071 BT_DBG("unregester dev"); 1072 btmrvl_sdio_unregister_dev(card); 1073 btmrvl_remove_card(card->priv); 1074 } 1075 } 1076 } 1077 1078 static int btmrvl_sdio_suspend(struct device *dev) 1079 { 1080 struct sdio_func *func = dev_to_sdio_func(dev); 1081 struct btmrvl_sdio_card *card; 1082 struct btmrvl_private *priv; 1083 mmc_pm_flag_t pm_flags; 1084 struct hci_dev *hcidev; 1085 1086 if (func) { 1087 pm_flags = sdio_get_host_pm_caps(func); 1088 BT_DBG("%s: suspend: PM flags = 0x%x", sdio_func_id(func), 1089 pm_flags); 1090 if (!(pm_flags & MMC_PM_KEEP_POWER)) { 1091 BT_ERR("%s: cannot remain alive while suspended", 1092 sdio_func_id(func)); 1093 return -ENOSYS; 1094 } 1095 card = sdio_get_drvdata(func); 1096 if (!card || !card->priv) { 1097 BT_ERR("card or priv structure is not valid"); 1098 return 0; 1099 } 1100 } else { 1101 BT_ERR("sdio_func is not specified"); 1102 return 0; 1103 } 1104 1105 priv = card->priv; 1106 1107 if (priv->adapter->hs_state != HS_ACTIVATED) { 1108 if (btmrvl_enable_hs(priv)) { 1109 BT_ERR("HS not actived, suspend failed!"); 1110 return -EBUSY; 1111 } 1112 } 1113 hcidev = priv->btmrvl_dev.hcidev; 1114 BT_DBG("%s: SDIO suspend", hcidev->name); 1115 hci_suspend_dev(hcidev); 1116 skb_queue_purge(&priv->adapter->tx_queue); 1117 1118 priv->adapter->is_suspended = true; 1119 1120 /* We will keep the power when hs enabled successfully */ 1121 if (priv->adapter->hs_state == HS_ACTIVATED) { 1122 BT_DBG("suspend with MMC_PM_KEEP_POWER"); 1123 return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 1124 } else { 1125 BT_DBG("suspend without MMC_PM_KEEP_POWER"); 1126 return 0; 1127 } 1128 } 1129 1130 static int btmrvl_sdio_resume(struct device *dev) 1131 { 1132 struct sdio_func *func = dev_to_sdio_func(dev); 1133 struct btmrvl_sdio_card *card; 1134 struct btmrvl_private *priv; 1135 mmc_pm_flag_t pm_flags; 1136 struct hci_dev *hcidev; 1137 1138 if (func) { 1139 pm_flags = sdio_get_host_pm_caps(func); 1140 BT_DBG("%s: resume: PM flags = 0x%x", sdio_func_id(func), 1141 pm_flags); 1142 card = sdio_get_drvdata(func); 1143 if (!card || !card->priv) { 1144 BT_ERR("card or priv structure is not valid"); 1145 return 0; 1146 } 1147 } else { 1148 BT_ERR("sdio_func is not specified"); 1149 return 0; 1150 } 1151 priv = card->priv; 1152 1153 if (!priv->adapter->is_suspended) { 1154 BT_DBG("device already resumed"); 1155 return 0; 1156 } 1157 1158 priv->adapter->is_suspended = false; 1159 hcidev = priv->btmrvl_dev.hcidev; 1160 BT_DBG("%s: SDIO resume", hcidev->name); 1161 hci_resume_dev(hcidev); 1162 priv->hw_wakeup_firmware(priv); 1163 priv->adapter->hs_state = HS_DEACTIVATED; 1164 BT_DBG("%s: HS DEACTIVATED in resume!", hcidev->name); 1165 1166 return 0; 1167 } 1168 1169 static const struct dev_pm_ops btmrvl_sdio_pm_ops = { 1170 .suspend = btmrvl_sdio_suspend, 1171 .resume = btmrvl_sdio_resume, 1172 }; 1173 1174 static struct sdio_driver bt_mrvl_sdio = { 1175 .name = "btmrvl_sdio", 1176 .id_table = btmrvl_sdio_ids, 1177 .probe = btmrvl_sdio_probe, 1178 .remove = btmrvl_sdio_remove, 1179 .drv = { 1180 .owner = THIS_MODULE, 1181 .pm = &btmrvl_sdio_pm_ops, 1182 } 1183 }; 1184 1185 static int __init btmrvl_sdio_init_module(void) 1186 { 1187 if (sdio_register_driver(&bt_mrvl_sdio) != 0) { 1188 BT_ERR("SDIO Driver Registration Failed"); 1189 return -ENODEV; 1190 } 1191 1192 /* Clear the flag in case user removes the card. */ 1193 user_rmmod = 0; 1194 1195 return 0; 1196 } 1197 1198 static void __exit btmrvl_sdio_exit_module(void) 1199 { 1200 /* Set the flag as user is removing this module. */ 1201 user_rmmod = 1; 1202 1203 sdio_unregister_driver(&bt_mrvl_sdio); 1204 } 1205 1206 module_init(btmrvl_sdio_init_module); 1207 module_exit(btmrvl_sdio_exit_module); 1208 1209 MODULE_AUTHOR("Marvell International Ltd."); 1210 MODULE_DESCRIPTION("Marvell BT-over-SDIO driver ver " VERSION); 1211 MODULE_VERSION(VERSION); 1212 MODULE_LICENSE("GPL v2"); 1213 MODULE_FIRMWARE("mrvl/sd8688_helper.bin"); 1214 MODULE_FIRMWARE("mrvl/sd8688.bin"); 1215 MODULE_FIRMWARE("mrvl/sd8787_uapsta.bin"); 1216 MODULE_FIRMWARE("mrvl/sd8797_uapsta.bin"); 1217 MODULE_FIRMWARE("mrvl/sd8897_uapsta.bin"); 1218