1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2019 MediaTek Inc. 3 4 /* 5 * Bluetooth support for MediaTek SDIO devices 6 * 7 * This file is written based on btsdio.c and btmtkuart.c. 8 * 9 * Author: Sean Wang <sean.wang@mediatek.com> 10 * 11 */ 12 13 #include <asm/unaligned.h> 14 #include <linux/atomic.h> 15 #include <linux/gpio/consumer.h> 16 #include <linux/init.h> 17 #include <linux/iopoll.h> 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/of.h> 21 #include <linux/pm_runtime.h> 22 #include <linux/skbuff.h> 23 24 #include <linux/mmc/host.h> 25 #include <linux/mmc/sdio_ids.h> 26 #include <linux/mmc/sdio_func.h> 27 28 #include <net/bluetooth/bluetooth.h> 29 #include <net/bluetooth/hci_core.h> 30 31 #include "h4_recv.h" 32 #include "btmtk.h" 33 34 #define VERSION "0.1" 35 36 #define MTKBTSDIO_AUTOSUSPEND_DELAY 1000 37 38 static bool enable_autosuspend = true; 39 40 struct btmtksdio_data { 41 const char *fwname; 42 u16 chipid; 43 bool lp_mbox_supported; 44 }; 45 46 static const struct btmtksdio_data mt7663_data = { 47 .fwname = FIRMWARE_MT7663, 48 .chipid = 0x7663, 49 .lp_mbox_supported = false, 50 }; 51 52 static const struct btmtksdio_data mt7668_data = { 53 .fwname = FIRMWARE_MT7668, 54 .chipid = 0x7668, 55 .lp_mbox_supported = false, 56 }; 57 58 static const struct btmtksdio_data mt7921_data = { 59 .fwname = FIRMWARE_MT7961, 60 .chipid = 0x7921, 61 .lp_mbox_supported = true, 62 }; 63 64 static const struct sdio_device_id btmtksdio_table[] = { 65 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663), 66 .driver_data = (kernel_ulong_t)&mt7663_data }, 67 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668), 68 .driver_data = (kernel_ulong_t)&mt7668_data }, 69 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7961), 70 .driver_data = (kernel_ulong_t)&mt7921_data }, 71 { } /* Terminating entry */ 72 }; 73 MODULE_DEVICE_TABLE(sdio, btmtksdio_table); 74 75 #define MTK_REG_CHLPCR 0x4 /* W1S */ 76 #define C_INT_EN_SET BIT(0) 77 #define C_INT_EN_CLR BIT(1) 78 #define C_FW_OWN_REQ_SET BIT(8) /* For write */ 79 #define C_COM_DRV_OWN BIT(8) /* For read */ 80 #define C_FW_OWN_REQ_CLR BIT(9) 81 82 #define MTK_REG_CSDIOCSR 0x8 83 #define SDIO_RE_INIT_EN BIT(0) 84 #define SDIO_INT_CTL BIT(2) 85 86 #define MTK_REG_CHCR 0xc 87 #define C_INT_CLR_CTRL BIT(1) 88 #define BT_RST_DONE BIT(8) 89 90 /* CHISR have the same bits field definition with CHIER */ 91 #define MTK_REG_CHISR 0x10 92 #define MTK_REG_CHIER 0x14 93 #define FW_OWN_BACK_INT BIT(0) 94 #define RX_DONE_INT BIT(1) 95 #define TX_EMPTY BIT(2) 96 #define TX_FIFO_OVERFLOW BIT(8) 97 #define FW_MAILBOX_INT BIT(15) 98 #define INT_MASK GENMASK(15, 0) 99 #define RX_PKT_LEN GENMASK(31, 16) 100 101 #define MTK_REG_CSICR 0xc0 102 #define CSICR_CLR_MBOX_ACK BIT(0) 103 #define MTK_REG_PH2DSM0R 0xc4 104 #define PH2DSM0R_DRIVER_OWN BIT(0) 105 #define MTK_REG_PD2HRM0R 0xdc 106 #define PD2HRM0R_DRV_OWN BIT(0) 107 108 #define MTK_REG_CTDR 0x18 109 110 #define MTK_REG_CRDR 0x1c 111 112 #define MTK_REG_CRPLR 0x24 113 114 #define MTK_SDIO_BLOCK_SIZE 256 115 116 #define BTMTKSDIO_TX_WAIT_VND_EVT 1 117 #define BTMTKSDIO_HW_TX_READY 2 118 #define BTMTKSDIO_FUNC_ENABLED 3 119 #define BTMTKSDIO_PATCH_ENABLED 4 120 #define BTMTKSDIO_HW_RESET_ACTIVE 5 121 122 struct mtkbtsdio_hdr { 123 __le16 len; 124 __le16 reserved; 125 u8 bt_type; 126 } __packed; 127 128 struct btmtksdio_dev { 129 struct hci_dev *hdev; 130 struct sdio_func *func; 131 struct device *dev; 132 133 struct work_struct txrx_work; 134 unsigned long tx_state; 135 struct sk_buff_head txq; 136 137 struct sk_buff *evt_skb; 138 139 const struct btmtksdio_data *data; 140 141 struct gpio_desc *reset; 142 }; 143 144 static int mtk_hci_wmt_sync(struct hci_dev *hdev, 145 struct btmtk_hci_wmt_params *wmt_params) 146 { 147 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 148 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc; 149 struct btmtk_hci_wmt_evt_reg *wmt_evt_reg; 150 u32 hlen, status = BTMTK_WMT_INVALID; 151 struct btmtk_hci_wmt_evt *wmt_evt; 152 struct btmtk_hci_wmt_cmd *wc; 153 struct btmtk_wmt_hdr *hdr; 154 int err; 155 156 /* Send the WMT command and wait until the WMT event returns */ 157 hlen = sizeof(*hdr) + wmt_params->dlen; 158 if (hlen > 255) 159 return -EINVAL; 160 161 wc = kzalloc(hlen, GFP_KERNEL); 162 if (!wc) 163 return -ENOMEM; 164 165 hdr = &wc->hdr; 166 hdr->dir = 1; 167 hdr->op = wmt_params->op; 168 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1); 169 hdr->flag = wmt_params->flag; 170 memcpy(wc->data, wmt_params->data, wmt_params->dlen); 171 172 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 173 174 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc); 175 if (err < 0) { 176 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 177 goto err_free_wc; 178 } 179 180 /* The vendor specific WMT commands are all answered by a vendor 181 * specific event and will not have the Command Status or Command 182 * Complete as with usual HCI command flow control. 183 * 184 * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT 185 * state to be cleared. The driver specific event receive routine 186 * will clear that state and with that indicate completion of the 187 * WMT command. 188 */ 189 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT, 190 TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT); 191 if (err == -EINTR) { 192 bt_dev_err(hdev, "Execution of wmt command interrupted"); 193 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 194 goto err_free_wc; 195 } 196 197 if (err) { 198 bt_dev_err(hdev, "Execution of wmt command timed out"); 199 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 200 err = -ETIMEDOUT; 201 goto err_free_wc; 202 } 203 204 /* Parse and handle the return WMT event */ 205 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data; 206 if (wmt_evt->whdr.op != hdr->op) { 207 bt_dev_err(hdev, "Wrong op received %d expected %d", 208 wmt_evt->whdr.op, hdr->op); 209 err = -EIO; 210 goto err_free_skb; 211 } 212 213 switch (wmt_evt->whdr.op) { 214 case BTMTK_WMT_SEMAPHORE: 215 if (wmt_evt->whdr.flag == 2) 216 status = BTMTK_WMT_PATCH_UNDONE; 217 else 218 status = BTMTK_WMT_PATCH_DONE; 219 break; 220 case BTMTK_WMT_FUNC_CTRL: 221 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt; 222 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404) 223 status = BTMTK_WMT_ON_DONE; 224 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420) 225 status = BTMTK_WMT_ON_PROGRESS; 226 else 227 status = BTMTK_WMT_ON_UNDONE; 228 break; 229 case BTMTK_WMT_PATCH_DWNLD: 230 if (wmt_evt->whdr.flag == 2) 231 status = BTMTK_WMT_PATCH_DONE; 232 else if (wmt_evt->whdr.flag == 1) 233 status = BTMTK_WMT_PATCH_PROGRESS; 234 else 235 status = BTMTK_WMT_PATCH_UNDONE; 236 break; 237 case BTMTK_WMT_REGISTER: 238 wmt_evt_reg = (struct btmtk_hci_wmt_evt_reg *)wmt_evt; 239 if (le16_to_cpu(wmt_evt->whdr.dlen) == 12) 240 status = le32_to_cpu(wmt_evt_reg->val); 241 break; 242 } 243 244 if (wmt_params->status) 245 *wmt_params->status = status; 246 247 err_free_skb: 248 kfree_skb(bdev->evt_skb); 249 bdev->evt_skb = NULL; 250 err_free_wc: 251 kfree(wc); 252 253 return err; 254 } 255 256 static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev, 257 struct sk_buff *skb) 258 { 259 struct mtkbtsdio_hdr *sdio_hdr; 260 int err; 261 262 /* Make sure that there are enough rooms for SDIO header */ 263 if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) { 264 err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0, 265 GFP_ATOMIC); 266 if (err < 0) 267 return err; 268 } 269 270 /* Prepend MediaTek SDIO Specific Header */ 271 skb_push(skb, sizeof(*sdio_hdr)); 272 273 sdio_hdr = (void *)skb->data; 274 sdio_hdr->len = cpu_to_le16(skb->len); 275 sdio_hdr->reserved = cpu_to_le16(0); 276 sdio_hdr->bt_type = hci_skb_pkt_type(skb); 277 278 clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); 279 err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data, 280 round_up(skb->len, MTK_SDIO_BLOCK_SIZE)); 281 if (err < 0) 282 goto err_skb_pull; 283 284 bdev->hdev->stat.byte_tx += skb->len; 285 286 kfree_skb(skb); 287 288 return 0; 289 290 err_skb_pull: 291 skb_pull(skb, sizeof(*sdio_hdr)); 292 293 return err; 294 } 295 296 static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev) 297 { 298 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL); 299 } 300 301 static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev) 302 { 303 return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL); 304 } 305 306 static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev) 307 { 308 return sdio_readl(bdev->func, MTK_REG_CHCR, NULL); 309 } 310 311 static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev) 312 { 313 u32 status; 314 int err; 315 316 sdio_claim_host(bdev->func); 317 318 if (bdev->data->lp_mbox_supported && 319 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) { 320 sdio_writel(bdev->func, CSICR_CLR_MBOX_ACK, MTK_REG_CSICR, 321 &err); 322 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev, 323 status, !(status & PD2HRM0R_DRV_OWN), 324 2000, 1000000); 325 if (err < 0) { 326 bt_dev_err(bdev->hdev, "mailbox ACK not cleared"); 327 goto out; 328 } 329 } 330 331 /* Return ownership to the device */ 332 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err); 333 if (err < 0) 334 goto out; 335 336 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, 337 !(status & C_COM_DRV_OWN), 2000, 1000000); 338 339 out: 340 sdio_release_host(bdev->func); 341 342 if (err < 0) 343 bt_dev_err(bdev->hdev, "Cannot return ownership to device"); 344 345 return err; 346 } 347 348 static int btmtksdio_drv_pmctrl(struct btmtksdio_dev *bdev) 349 { 350 u32 status; 351 int err; 352 353 sdio_claim_host(bdev->func); 354 355 /* Get ownership from the device */ 356 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err); 357 if (err < 0) 358 goto out; 359 360 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, 361 status & C_COM_DRV_OWN, 2000, 1000000); 362 363 if (!err && bdev->data->lp_mbox_supported && 364 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) 365 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev, 366 status, status & PD2HRM0R_DRV_OWN, 367 2000, 1000000); 368 369 out: 370 sdio_release_host(bdev->func); 371 372 if (err < 0) 373 bt_dev_err(bdev->hdev, "Cannot get ownership from device"); 374 375 return err; 376 } 377 378 static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb) 379 { 380 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 381 struct hci_event_hdr *hdr = (void *)skb->data; 382 u8 evt = hdr->evt; 383 int err; 384 385 /* When someone waits for the WMT event, the skb is being cloned 386 * and being processed the events from there then. 387 */ 388 if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) { 389 bdev->evt_skb = skb_clone(skb, GFP_KERNEL); 390 if (!bdev->evt_skb) { 391 err = -ENOMEM; 392 goto err_out; 393 } 394 } 395 396 err = hci_recv_frame(hdev, skb); 397 if (err < 0) 398 goto err_free_skb; 399 400 if (evt == HCI_EV_WMT) { 401 if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, 402 &bdev->tx_state)) { 403 /* Barrier to sync with other CPUs */ 404 smp_mb__after_atomic(); 405 wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT); 406 } 407 } 408 409 return 0; 410 411 err_free_skb: 412 kfree_skb(bdev->evt_skb); 413 bdev->evt_skb = NULL; 414 415 err_out: 416 return err; 417 } 418 419 static int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) 420 { 421 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 422 u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle); 423 424 switch (handle) { 425 case 0xfc6f: 426 /* Firmware dump from device: when the firmware hangs, the 427 * device can no longer suspend and thus disable auto-suspend. 428 */ 429 pm_runtime_forbid(bdev->dev); 430 fallthrough; 431 case 0x05ff: 432 case 0x05fe: 433 /* Firmware debug logging */ 434 return hci_recv_diag(hdev, skb); 435 } 436 437 return hci_recv_frame(hdev, skb); 438 } 439 440 static const struct h4_recv_pkt mtk_recv_pkts[] = { 441 { H4_RECV_ACL, .recv = btmtksdio_recv_acl }, 442 { H4_RECV_SCO, .recv = hci_recv_frame }, 443 { H4_RECV_EVENT, .recv = btmtksdio_recv_event }, 444 }; 445 446 static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size) 447 { 448 const struct h4_recv_pkt *pkts = mtk_recv_pkts; 449 int pkts_count = ARRAY_SIZE(mtk_recv_pkts); 450 struct mtkbtsdio_hdr *sdio_hdr; 451 int err, i, pad_size; 452 struct sk_buff *skb; 453 u16 dlen; 454 455 if (rx_size < sizeof(*sdio_hdr)) 456 return -EILSEQ; 457 458 /* A SDIO packet is exactly containing a Bluetooth packet */ 459 skb = bt_skb_alloc(rx_size, GFP_KERNEL); 460 if (!skb) 461 return -ENOMEM; 462 463 skb_put(skb, rx_size); 464 465 err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size); 466 if (err < 0) 467 goto err_kfree_skb; 468 469 sdio_hdr = (void *)skb->data; 470 471 /* We assume the default error as -EILSEQ simply to make the error path 472 * be cleaner. 473 */ 474 err = -EILSEQ; 475 476 if (rx_size != le16_to_cpu(sdio_hdr->len)) { 477 bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched "); 478 goto err_kfree_skb; 479 } 480 481 hci_skb_pkt_type(skb) = sdio_hdr->bt_type; 482 483 /* Remove MediaTek SDIO header */ 484 skb_pull(skb, sizeof(*sdio_hdr)); 485 486 /* We have to dig into the packet to get payload size and then know how 487 * many padding bytes at the tail, these padding bytes should be removed 488 * before the packet is indicated to the core layer. 489 */ 490 for (i = 0; i < pkts_count; i++) { 491 if (sdio_hdr->bt_type == (&pkts[i])->type) 492 break; 493 } 494 495 if (i >= pkts_count) { 496 bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x", 497 sdio_hdr->bt_type); 498 goto err_kfree_skb; 499 } 500 501 /* Remaining bytes cannot hold a header*/ 502 if (skb->len < (&pkts[i])->hlen) { 503 bt_dev_err(bdev->hdev, "The size of bt header is mismatched"); 504 goto err_kfree_skb; 505 } 506 507 switch ((&pkts[i])->lsize) { 508 case 1: 509 dlen = skb->data[(&pkts[i])->loff]; 510 break; 511 case 2: 512 dlen = get_unaligned_le16(skb->data + 513 (&pkts[i])->loff); 514 break; 515 default: 516 goto err_kfree_skb; 517 } 518 519 pad_size = skb->len - (&pkts[i])->hlen - dlen; 520 521 /* Remaining bytes cannot hold a payload */ 522 if (pad_size < 0) { 523 bt_dev_err(bdev->hdev, "The size of bt payload is mismatched"); 524 goto err_kfree_skb; 525 } 526 527 /* Remove padding bytes */ 528 skb_trim(skb, skb->len - pad_size); 529 530 /* Complete frame */ 531 (&pkts[i])->recv(bdev->hdev, skb); 532 533 bdev->hdev->stat.byte_rx += rx_size; 534 535 return 0; 536 537 err_kfree_skb: 538 kfree_skb(skb); 539 540 return err; 541 } 542 543 static void btmtksdio_txrx_work(struct work_struct *work) 544 { 545 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev, 546 txrx_work); 547 unsigned long txrx_timeout; 548 u32 int_status, rx_size; 549 struct sk_buff *skb; 550 int err; 551 552 pm_runtime_get_sync(bdev->dev); 553 554 sdio_claim_host(bdev->func); 555 556 /* Disable interrupt */ 557 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0); 558 559 txrx_timeout = jiffies + 5 * HZ; 560 561 do { 562 int_status = sdio_readl(bdev->func, MTK_REG_CHISR, NULL); 563 564 /* Ack an interrupt as soon as possible before any operation on 565 * hardware. 566 * 567 * Note that we don't ack any status during operations to avoid race 568 * condition between the host and the device such as it's possible to 569 * mistakenly ack RX_DONE for the next packet and then cause interrupts 570 * not be raised again but there is still pending data in the hardware 571 * FIFO. 572 */ 573 sdio_writel(bdev->func, int_status, MTK_REG_CHISR, NULL); 574 int_status &= INT_MASK; 575 576 if ((int_status & FW_MAILBOX_INT) && 577 bdev->data->chipid == 0x7921) { 578 sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN, 579 MTK_REG_PH2DSM0R, 0); 580 } 581 582 if (int_status & FW_OWN_BACK_INT) 583 bt_dev_dbg(bdev->hdev, "Get fw own back"); 584 585 if (int_status & TX_EMPTY) 586 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); 587 588 else if (unlikely(int_status & TX_FIFO_OVERFLOW)) 589 bt_dev_warn(bdev->hdev, "Tx fifo overflow"); 590 591 if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) { 592 skb = skb_dequeue(&bdev->txq); 593 if (skb) { 594 err = btmtksdio_tx_packet(bdev, skb); 595 if (err < 0) { 596 bdev->hdev->stat.err_tx++; 597 skb_queue_head(&bdev->txq, skb); 598 } 599 } 600 } 601 602 if (int_status & RX_DONE_INT) { 603 rx_size = sdio_readl(bdev->func, MTK_REG_CRPLR, NULL); 604 rx_size = (rx_size & RX_PKT_LEN) >> 16; 605 if (btmtksdio_rx_packet(bdev, rx_size) < 0) 606 bdev->hdev->stat.err_rx++; 607 } 608 } while (int_status || time_is_before_jiffies(txrx_timeout)); 609 610 /* Enable interrupt */ 611 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, 0); 612 613 sdio_release_host(bdev->func); 614 615 pm_runtime_mark_last_busy(bdev->dev); 616 pm_runtime_put_autosuspend(bdev->dev); 617 } 618 619 static void btmtksdio_interrupt(struct sdio_func *func) 620 { 621 struct btmtksdio_dev *bdev = sdio_get_drvdata(func); 622 623 /* Disable interrupt */ 624 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0); 625 626 schedule_work(&bdev->txrx_work); 627 } 628 629 static int btmtksdio_open(struct hci_dev *hdev) 630 { 631 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 632 u32 val; 633 int err; 634 635 sdio_claim_host(bdev->func); 636 637 err = sdio_enable_func(bdev->func); 638 if (err < 0) 639 goto err_release_host; 640 641 set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); 642 643 err = btmtksdio_drv_pmctrl(bdev); 644 if (err < 0) 645 goto err_disable_func; 646 647 /* Disable interrupt & mask out all interrupt sources */ 648 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err); 649 if (err < 0) 650 goto err_disable_func; 651 652 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err); 653 if (err < 0) 654 goto err_disable_func; 655 656 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt); 657 if (err < 0) 658 goto err_disable_func; 659 660 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE); 661 if (err < 0) 662 goto err_release_irq; 663 664 /* SDIO CMD 5 allows the SDIO device back to idle state an 665 * synchronous interrupt is supported in SDIO 4-bit mode 666 */ 667 val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err); 668 if (err < 0) 669 goto err_release_irq; 670 671 val |= SDIO_INT_CTL; 672 sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err); 673 if (err < 0) 674 goto err_release_irq; 675 676 /* Explitly set write-1-clear method */ 677 val = sdio_readl(bdev->func, MTK_REG_CHCR, &err); 678 if (err < 0) 679 goto err_release_irq; 680 681 val |= C_INT_CLR_CTRL; 682 sdio_writel(bdev->func, val, MTK_REG_CHCR, &err); 683 if (err < 0) 684 goto err_release_irq; 685 686 /* Setup interrupt sources */ 687 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW, 688 MTK_REG_CHIER, &err); 689 if (err < 0) 690 goto err_release_irq; 691 692 /* Enable interrupt */ 693 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err); 694 if (err < 0) 695 goto err_release_irq; 696 697 sdio_release_host(bdev->func); 698 699 return 0; 700 701 err_release_irq: 702 sdio_release_irq(bdev->func); 703 704 err_disable_func: 705 sdio_disable_func(bdev->func); 706 707 err_release_host: 708 sdio_release_host(bdev->func); 709 710 return err; 711 } 712 713 static int btmtksdio_close(struct hci_dev *hdev) 714 { 715 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 716 717 sdio_claim_host(bdev->func); 718 719 /* Disable interrupt */ 720 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 721 722 sdio_release_irq(bdev->func); 723 724 cancel_work_sync(&bdev->txrx_work); 725 726 btmtksdio_fw_pmctrl(bdev); 727 728 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); 729 sdio_disable_func(bdev->func); 730 731 sdio_release_host(bdev->func); 732 733 return 0; 734 } 735 736 static int btmtksdio_flush(struct hci_dev *hdev) 737 { 738 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 739 740 skb_queue_purge(&bdev->txq); 741 742 cancel_work_sync(&bdev->txrx_work); 743 744 return 0; 745 } 746 747 static int btmtksdio_func_query(struct hci_dev *hdev) 748 { 749 struct btmtk_hci_wmt_params wmt_params; 750 int status, err; 751 u8 param = 0; 752 753 /* Query whether the function is enabled */ 754 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 755 wmt_params.flag = 4; 756 wmt_params.dlen = sizeof(param); 757 wmt_params.data = ¶m; 758 wmt_params.status = &status; 759 760 err = mtk_hci_wmt_sync(hdev, &wmt_params); 761 if (err < 0) { 762 bt_dev_err(hdev, "Failed to query function status (%d)", err); 763 return err; 764 } 765 766 return status; 767 } 768 769 static int mt76xx_setup(struct hci_dev *hdev, const char *fwname) 770 { 771 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 772 struct btmtk_hci_wmt_params wmt_params; 773 struct btmtk_tci_sleep tci_sleep; 774 struct sk_buff *skb; 775 int err, status; 776 u8 param = 0x1; 777 778 /* Query whether the firmware is already download */ 779 wmt_params.op = BTMTK_WMT_SEMAPHORE; 780 wmt_params.flag = 1; 781 wmt_params.dlen = 0; 782 wmt_params.data = NULL; 783 wmt_params.status = &status; 784 785 err = mtk_hci_wmt_sync(hdev, &wmt_params); 786 if (err < 0) { 787 bt_dev_err(hdev, "Failed to query firmware status (%d)", err); 788 return err; 789 } 790 791 if (status == BTMTK_WMT_PATCH_DONE) { 792 bt_dev_info(hdev, "Firmware already downloaded"); 793 goto ignore_setup_fw; 794 } 795 796 /* Setup a firmware which the device definitely requires */ 797 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync); 798 if (err < 0) 799 return err; 800 801 ignore_setup_fw: 802 /* Query whether the device is already enabled */ 803 err = readx_poll_timeout(btmtksdio_func_query, hdev, status, 804 status < 0 || status != BTMTK_WMT_ON_PROGRESS, 805 2000, 5000000); 806 /* -ETIMEDOUT happens */ 807 if (err < 0) 808 return err; 809 810 /* The other errors happen in btusb_mtk_func_query */ 811 if (status < 0) 812 return status; 813 814 if (status == BTMTK_WMT_ON_DONE) { 815 bt_dev_info(hdev, "function already on"); 816 goto ignore_func_on; 817 } 818 819 /* Enable Bluetooth protocol */ 820 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 821 wmt_params.flag = 0; 822 wmt_params.dlen = sizeof(param); 823 wmt_params.data = ¶m; 824 wmt_params.status = NULL; 825 826 err = mtk_hci_wmt_sync(hdev, &wmt_params); 827 if (err < 0) { 828 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 829 return err; 830 } 831 832 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 833 834 ignore_func_on: 835 /* Apply the low power environment setup */ 836 tci_sleep.mode = 0x5; 837 tci_sleep.duration = cpu_to_le16(0x640); 838 tci_sleep.host_duration = cpu_to_le16(0x640); 839 tci_sleep.host_wakeup_pin = 0; 840 tci_sleep.time_compensation = 0; 841 842 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep, 843 HCI_INIT_TIMEOUT); 844 if (IS_ERR(skb)) { 845 err = PTR_ERR(skb); 846 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err); 847 return err; 848 } 849 kfree_skb(skb); 850 851 return 0; 852 } 853 854 static int mt79xx_setup(struct hci_dev *hdev, const char *fwname) 855 { 856 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 857 struct btmtk_hci_wmt_params wmt_params; 858 u8 param = 0x1; 859 int err; 860 861 err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync); 862 if (err < 0) { 863 bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err); 864 return err; 865 } 866 867 err = btmtksdio_fw_pmctrl(bdev); 868 if (err < 0) 869 return err; 870 871 err = btmtksdio_drv_pmctrl(bdev); 872 if (err < 0) 873 return err; 874 875 /* Enable Bluetooth protocol */ 876 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 877 wmt_params.flag = 0; 878 wmt_params.dlen = sizeof(param); 879 wmt_params.data = ¶m; 880 wmt_params.status = NULL; 881 882 err = mtk_hci_wmt_sync(hdev, &wmt_params); 883 if (err < 0) { 884 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 885 return err; 886 } 887 888 hci_set_msft_opcode(hdev, 0xFD30); 889 hci_set_aosp_capable(hdev); 890 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 891 892 return err; 893 } 894 895 static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val) 896 { 897 struct btmtk_hci_wmt_params wmt_params; 898 struct reg_read_cmd reg_read = { 899 .type = 1, 900 .num = 1, 901 }; 902 u32 status; 903 int err; 904 905 reg_read.addr = cpu_to_le32(reg); 906 wmt_params.op = BTMTK_WMT_REGISTER; 907 wmt_params.flag = BTMTK_WMT_REG_READ; 908 wmt_params.dlen = sizeof(reg_read); 909 wmt_params.data = ®_read; 910 wmt_params.status = &status; 911 912 err = mtk_hci_wmt_sync(hdev, &wmt_params); 913 if (err < 0) { 914 bt_dev_err(hdev, "Failed to read reg (%d)", err); 915 return err; 916 } 917 918 *val = status; 919 920 return err; 921 } 922 923 static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask) 924 { 925 struct btmtk_hci_wmt_params wmt_params; 926 const struct reg_write_cmd reg_write = { 927 .type = 1, 928 .num = 1, 929 .addr = cpu_to_le32(reg), 930 .data = cpu_to_le32(val), 931 .mask = cpu_to_le32(mask), 932 }; 933 int err, status; 934 935 wmt_params.op = BTMTK_WMT_REGISTER; 936 wmt_params.flag = BTMTK_WMT_REG_WRITE; 937 wmt_params.dlen = sizeof(reg_write); 938 wmt_params.data = ®_write; 939 wmt_params.status = &status; 940 941 err = mtk_hci_wmt_sync(hdev, &wmt_params); 942 if (err < 0) 943 bt_dev_err(hdev, "Failed to write reg (%d)", err); 944 945 return err; 946 } 947 948 static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id) 949 { 950 /* uses 1 as data path id for all the usecases */ 951 *data_path_id = 1; 952 return 0; 953 } 954 955 static int btmtksdio_get_codec_config_data(struct hci_dev *hdev, 956 __u8 link, struct bt_codec *codec, 957 __u8 *ven_len, __u8 **ven_data) 958 { 959 int err = 0; 960 961 if (!ven_data || !ven_len) 962 return -EINVAL; 963 964 *ven_len = 0; 965 *ven_data = NULL; 966 967 if (link != ESCO_LINK) { 968 bt_dev_err(hdev, "Invalid link type(%u)", link); 969 return -EINVAL; 970 } 971 972 *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL); 973 if (!*ven_data) { 974 err = -ENOMEM; 975 goto error; 976 } 977 978 /* supports only CVSD and mSBC offload codecs */ 979 switch (codec->id) { 980 case 0x02: 981 **ven_data = 0x00; 982 break; 983 case 0x05: 984 **ven_data = 0x01; 985 break; 986 default: 987 err = -EINVAL; 988 bt_dev_err(hdev, "Invalid codec id(%u)", codec->id); 989 goto error; 990 } 991 /* codec and its capabilities are pre-defined to ids 992 * preset id = 0x00 represents CVSD codec with sampling rate 8K 993 * preset id = 0x01 represents mSBC codec with sampling rate 16K 994 */ 995 *ven_len = sizeof(__u8); 996 return err; 997 998 error: 999 kfree(*ven_data); 1000 *ven_data = NULL; 1001 return err; 1002 } 1003 1004 static int btmtksdio_sco_setting(struct hci_dev *hdev) 1005 { 1006 const struct btmtk_sco sco_setting = { 1007 .clock_config = 0x49, 1008 .channel_format_config = 0x80, 1009 }; 1010 struct sk_buff *skb; 1011 u32 val; 1012 int err; 1013 1014 /* Enable SCO over I2S/PCM for MediaTek chipset */ 1015 skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting), 1016 &sco_setting, HCI_CMD_TIMEOUT); 1017 if (IS_ERR(skb)) 1018 return PTR_ERR(skb); 1019 1020 kfree_skb(skb); 1021 1022 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val); 1023 if (err < 0) 1024 return err; 1025 1026 val |= 0x11000000; 1027 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0); 1028 if (err < 0) 1029 return err; 1030 1031 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val); 1032 if (err < 0) 1033 return err; 1034 1035 val |= 0x00000101; 1036 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); 1037 if (err < 0) 1038 return err; 1039 1040 hdev->get_data_path_id = btmtksdio_get_data_path_id; 1041 hdev->get_codec_config_data = btmtksdio_get_codec_config_data; 1042 1043 return err; 1044 } 1045 1046 static int btmtksdio_reset_setting(struct hci_dev *hdev) 1047 { 1048 int err; 1049 u32 val; 1050 1051 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val); 1052 if (err < 0) 1053 return err; 1054 1055 val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */ 1056 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); 1057 if (err < 0) 1058 return err; 1059 1060 err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val); 1061 if (err < 0) 1062 return err; 1063 1064 val |= MT7921_BTSYS_RST_WITH_GPIO; 1065 return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0); 1066 } 1067 1068 static int btmtksdio_setup(struct hci_dev *hdev) 1069 { 1070 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1071 ktime_t calltime, delta, rettime; 1072 unsigned long long duration; 1073 char fwname[64]; 1074 int err, dev_id; 1075 u32 fw_version = 0, val; 1076 1077 calltime = ktime_get(); 1078 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); 1079 1080 switch (bdev->data->chipid) { 1081 case 0x7921: 1082 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) { 1083 err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS, 1084 &val); 1085 if (err < 0) 1086 return err; 1087 1088 val &= ~BT_DL_STATE; 1089 err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS, 1090 val, ~0); 1091 if (err < 0) 1092 return err; 1093 1094 btmtksdio_fw_pmctrl(bdev); 1095 msleep(20); 1096 btmtksdio_drv_pmctrl(bdev); 1097 1098 clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state); 1099 } 1100 1101 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id); 1102 if (err < 0) { 1103 bt_dev_err(hdev, "Failed to get device id (%d)", err); 1104 return err; 1105 } 1106 1107 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version); 1108 if (err < 0) { 1109 bt_dev_err(hdev, "Failed to get fw version (%d)", err); 1110 return err; 1111 } 1112 1113 snprintf(fwname, sizeof(fwname), 1114 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin", 1115 dev_id & 0xffff, (fw_version & 0xff) + 1); 1116 err = mt79xx_setup(hdev, fwname); 1117 if (err < 0) 1118 return err; 1119 1120 /* Enable SCO over I2S/PCM */ 1121 err = btmtksdio_sco_setting(hdev); 1122 if (err < 0) { 1123 bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err); 1124 return err; 1125 } 1126 1127 /* Enable WBS with mSBC codec */ 1128 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks); 1129 1130 /* Enable GPIO reset mechanism */ 1131 if (bdev->reset) { 1132 err = btmtksdio_reset_setting(hdev); 1133 if (err < 0) { 1134 bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err); 1135 devm_gpiod_put(bdev->dev, bdev->reset); 1136 bdev->reset = NULL; 1137 } 1138 } 1139 1140 /* Valid LE States quirk for MediaTek 7921 */ 1141 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks); 1142 1143 break; 1144 case 0x7663: 1145 case 0x7668: 1146 err = mt76xx_setup(hdev, bdev->data->fwname); 1147 if (err < 0) 1148 return err; 1149 break; 1150 default: 1151 return -ENODEV; 1152 } 1153 1154 rettime = ktime_get(); 1155 delta = ktime_sub(rettime, calltime); 1156 duration = (unsigned long long)ktime_to_ns(delta) >> 10; 1157 1158 pm_runtime_set_autosuspend_delay(bdev->dev, 1159 MTKBTSDIO_AUTOSUSPEND_DELAY); 1160 pm_runtime_use_autosuspend(bdev->dev); 1161 1162 err = pm_runtime_set_active(bdev->dev); 1163 if (err < 0) 1164 return err; 1165 1166 /* Default forbid runtime auto suspend, that can be allowed by 1167 * enable_autosuspend flag or the PM runtime entry under sysfs. 1168 */ 1169 pm_runtime_forbid(bdev->dev); 1170 pm_runtime_enable(bdev->dev); 1171 1172 if (enable_autosuspend) 1173 pm_runtime_allow(bdev->dev); 1174 1175 bt_dev_info(hdev, "Device setup in %llu usecs", duration); 1176 1177 return 0; 1178 } 1179 1180 static int btmtksdio_shutdown(struct hci_dev *hdev) 1181 { 1182 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1183 struct btmtk_hci_wmt_params wmt_params; 1184 u8 param = 0x0; 1185 int err; 1186 1187 /* Get back the state to be consistent with the state 1188 * in btmtksdio_setup. 1189 */ 1190 pm_runtime_get_sync(bdev->dev); 1191 1192 /* wmt command only works until the reset is complete */ 1193 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) 1194 goto ignore_wmt_cmd; 1195 1196 /* Disable the device */ 1197 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 1198 wmt_params.flag = 0; 1199 wmt_params.dlen = sizeof(param); 1200 wmt_params.data = ¶m; 1201 wmt_params.status = NULL; 1202 1203 err = mtk_hci_wmt_sync(hdev, &wmt_params); 1204 if (err < 0) { 1205 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 1206 return err; 1207 } 1208 1209 ignore_wmt_cmd: 1210 pm_runtime_put_noidle(bdev->dev); 1211 pm_runtime_disable(bdev->dev); 1212 1213 return 0; 1214 } 1215 1216 static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 1217 { 1218 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1219 1220 switch (hci_skb_pkt_type(skb)) { 1221 case HCI_COMMAND_PKT: 1222 hdev->stat.cmd_tx++; 1223 break; 1224 1225 case HCI_ACLDATA_PKT: 1226 hdev->stat.acl_tx++; 1227 break; 1228 1229 case HCI_SCODATA_PKT: 1230 hdev->stat.sco_tx++; 1231 break; 1232 1233 default: 1234 return -EILSEQ; 1235 } 1236 1237 skb_queue_tail(&bdev->txq, skb); 1238 1239 schedule_work(&bdev->txrx_work); 1240 1241 return 0; 1242 } 1243 1244 static void btmtksdio_cmd_timeout(struct hci_dev *hdev) 1245 { 1246 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1247 u32 status; 1248 int err; 1249 1250 if (!bdev->reset || bdev->data->chipid != 0x7921) 1251 return; 1252 1253 pm_runtime_get_sync(bdev->dev); 1254 1255 if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) 1256 return; 1257 1258 sdio_claim_host(bdev->func); 1259 1260 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 1261 skb_queue_purge(&bdev->txq); 1262 cancel_work_sync(&bdev->txrx_work); 1263 1264 gpiod_set_value_cansleep(bdev->reset, 1); 1265 msleep(100); 1266 gpiod_set_value_cansleep(bdev->reset, 0); 1267 1268 err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status, 1269 status & BT_RST_DONE, 100000, 2000000); 1270 if (err < 0) { 1271 bt_dev_err(hdev, "Failed to reset (%d)", err); 1272 goto err; 1273 } 1274 1275 clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 1276 err: 1277 sdio_release_host(bdev->func); 1278 1279 pm_runtime_put_noidle(bdev->dev); 1280 pm_runtime_disable(bdev->dev); 1281 1282 hci_reset_dev(hdev); 1283 } 1284 1285 static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev) 1286 { 1287 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1288 bool may_wakeup = device_may_wakeup(bdev->dev); 1289 const struct btmtk_wakeon bt_awake = { 1290 .mode = 0x1, 1291 .gpo = 0, 1292 .active_high = 0x1, 1293 .enable_delay = cpu_to_le16(0xc80), 1294 .wakeup_delay = cpu_to_le16(0x20), 1295 }; 1296 1297 if (may_wakeup && bdev->data->chipid == 0x7921) { 1298 struct sk_buff *skb; 1299 1300 skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake), 1301 &bt_awake, HCI_CMD_TIMEOUT); 1302 if (IS_ERR(skb)) 1303 may_wakeup = false; 1304 else 1305 kfree_skb(skb); 1306 } 1307 1308 return may_wakeup; 1309 } 1310 1311 static int btmtksdio_probe(struct sdio_func *func, 1312 const struct sdio_device_id *id) 1313 { 1314 struct btmtksdio_dev *bdev; 1315 struct hci_dev *hdev; 1316 int err; 1317 1318 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL); 1319 if (!bdev) 1320 return -ENOMEM; 1321 1322 bdev->data = (void *)id->driver_data; 1323 if (!bdev->data) 1324 return -ENODEV; 1325 1326 bdev->dev = &func->dev; 1327 bdev->func = func; 1328 1329 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work); 1330 skb_queue_head_init(&bdev->txq); 1331 1332 /* Initialize and register HCI device */ 1333 hdev = hci_alloc_dev(); 1334 if (!hdev) { 1335 dev_err(&func->dev, "Can't allocate HCI device\n"); 1336 return -ENOMEM; 1337 } 1338 1339 bdev->hdev = hdev; 1340 1341 hdev->bus = HCI_SDIO; 1342 hci_set_drvdata(hdev, bdev); 1343 1344 hdev->open = btmtksdio_open; 1345 hdev->close = btmtksdio_close; 1346 hdev->cmd_timeout = btmtksdio_cmd_timeout; 1347 hdev->flush = btmtksdio_flush; 1348 hdev->setup = btmtksdio_setup; 1349 hdev->shutdown = btmtksdio_shutdown; 1350 hdev->send = btmtksdio_send_frame; 1351 hdev->wakeup = btmtksdio_sdio_wakeup; 1352 hdev->set_bdaddr = btmtk_set_bdaddr; 1353 1354 SET_HCIDEV_DEV(hdev, &func->dev); 1355 1356 hdev->manufacturer = 70; 1357 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); 1358 1359 sdio_set_drvdata(func, bdev); 1360 1361 err = hci_register_dev(hdev); 1362 if (err < 0) { 1363 dev_err(&func->dev, "Can't register HCI device\n"); 1364 hci_free_dev(hdev); 1365 return err; 1366 } 1367 1368 /* pm_runtime_enable would be done after the firmware is being 1369 * downloaded because the core layer probably already enables 1370 * runtime PM for this func such as the case host->caps & 1371 * MMC_CAP_POWER_OFF_CARD. 1372 */ 1373 if (pm_runtime_enabled(bdev->dev)) 1374 pm_runtime_disable(bdev->dev); 1375 1376 /* As explaination in drivers/mmc/core/sdio_bus.c tells us: 1377 * Unbound SDIO functions are always suspended. 1378 * During probe, the function is set active and the usage count 1379 * is incremented. If the driver supports runtime PM, 1380 * it should call pm_runtime_put_noidle() in its probe routine and 1381 * pm_runtime_get_noresume() in its remove routine. 1382 * 1383 * So, put a pm_runtime_put_noidle here ! 1384 */ 1385 pm_runtime_put_noidle(bdev->dev); 1386 1387 err = device_init_wakeup(bdev->dev, true); 1388 if (err) 1389 bt_dev_err(hdev, "failed to initialize device wakeup"); 1390 1391 bdev->dev->of_node = of_find_compatible_node(NULL, NULL, 1392 "mediatek,mt7921s-bluetooth"); 1393 bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset", 1394 GPIOD_OUT_LOW); 1395 if (IS_ERR(bdev->reset)) 1396 err = PTR_ERR(bdev->reset); 1397 1398 return err; 1399 } 1400 1401 static void btmtksdio_remove(struct sdio_func *func) 1402 { 1403 struct btmtksdio_dev *bdev = sdio_get_drvdata(func); 1404 struct hci_dev *hdev; 1405 1406 if (!bdev) 1407 return; 1408 1409 /* Be consistent the state in btmtksdio_probe */ 1410 pm_runtime_get_noresume(bdev->dev); 1411 1412 hdev = bdev->hdev; 1413 1414 sdio_set_drvdata(func, NULL); 1415 hci_unregister_dev(hdev); 1416 hci_free_dev(hdev); 1417 } 1418 1419 #ifdef CONFIG_PM 1420 static int btmtksdio_runtime_suspend(struct device *dev) 1421 { 1422 struct sdio_func *func = dev_to_sdio_func(dev); 1423 struct btmtksdio_dev *bdev; 1424 int err; 1425 1426 bdev = sdio_get_drvdata(func); 1427 if (!bdev) 1428 return 0; 1429 1430 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1431 return 0; 1432 1433 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 1434 1435 err = btmtksdio_fw_pmctrl(bdev); 1436 1437 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err); 1438 1439 return err; 1440 } 1441 1442 static int btmtksdio_runtime_resume(struct device *dev) 1443 { 1444 struct sdio_func *func = dev_to_sdio_func(dev); 1445 struct btmtksdio_dev *bdev; 1446 int err; 1447 1448 bdev = sdio_get_drvdata(func); 1449 if (!bdev) 1450 return 0; 1451 1452 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1453 return 0; 1454 1455 err = btmtksdio_drv_pmctrl(bdev); 1456 1457 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err); 1458 1459 return err; 1460 } 1461 1462 static UNIVERSAL_DEV_PM_OPS(btmtksdio_pm_ops, btmtksdio_runtime_suspend, 1463 btmtksdio_runtime_resume, NULL); 1464 #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops) 1465 #else /* CONFIG_PM */ 1466 #define BTMTKSDIO_PM_OPS NULL 1467 #endif /* CONFIG_PM */ 1468 1469 static struct sdio_driver btmtksdio_driver = { 1470 .name = "btmtksdio", 1471 .probe = btmtksdio_probe, 1472 .remove = btmtksdio_remove, 1473 .id_table = btmtksdio_table, 1474 .drv = { 1475 .owner = THIS_MODULE, 1476 .pm = BTMTKSDIO_PM_OPS, 1477 } 1478 }; 1479 1480 module_sdio_driver(btmtksdio_driver); 1481 1482 module_param(enable_autosuspend, bool, 0644); 1483 MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default"); 1484 1485 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); 1486 MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION); 1487 MODULE_VERSION(VERSION); 1488 MODULE_LICENSE("GPL"); 1489