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 <linux/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 #include <linux/usb.h> 24 25 #include <linux/mmc/host.h> 26 #include <linux/mmc/sdio_ids.h> 27 #include <linux/mmc/sdio_func.h> 28 29 #include <net/bluetooth/bluetooth.h> 30 #include <net/bluetooth/hci_core.h> 31 32 #include "h4_recv.h" 33 #include "btmtk.h" 34 35 #define VERSION "0.1" 36 37 #define MTKBTSDIO_AUTOSUSPEND_DELAY 1000 38 39 static bool enable_autosuspend = true; 40 41 struct btmtksdio_data { 42 const char *fwname; 43 u16 chipid; 44 bool lp_mbox_supported; 45 }; 46 47 static const struct btmtksdio_data mt7663_data = { 48 .fwname = FIRMWARE_MT7663, 49 .chipid = 0x7663, 50 .lp_mbox_supported = false, 51 }; 52 53 static const struct btmtksdio_data mt7668_data = { 54 .fwname = FIRMWARE_MT7668, 55 .chipid = 0x7668, 56 .lp_mbox_supported = false, 57 }; 58 59 static const struct btmtksdio_data mt7921_data = { 60 .fwname = FIRMWARE_MT7961, 61 .chipid = 0x7921, 62 .lp_mbox_supported = true, 63 }; 64 65 static const struct sdio_device_id btmtksdio_table[] = { 66 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663), 67 .driver_data = (kernel_ulong_t)&mt7663_data }, 68 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668), 69 .driver_data = (kernel_ulong_t)&mt7668_data }, 70 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7961), 71 .driver_data = (kernel_ulong_t)&mt7921_data }, 72 { } /* Terminating entry */ 73 }; 74 MODULE_DEVICE_TABLE(sdio, btmtksdio_table); 75 76 #define MTK_REG_CHLPCR 0x4 /* W1S */ 77 #define C_INT_EN_SET BIT(0) 78 #define C_INT_EN_CLR BIT(1) 79 #define C_FW_OWN_REQ_SET BIT(8) /* For write */ 80 #define C_COM_DRV_OWN BIT(8) /* For read */ 81 #define C_FW_OWN_REQ_CLR BIT(9) 82 83 #define MTK_REG_CSDIOCSR 0x8 84 #define SDIO_RE_INIT_EN BIT(0) 85 #define SDIO_INT_CTL BIT(2) 86 87 #define MTK_REG_CHCR 0xc 88 #define C_INT_CLR_CTRL BIT(1) 89 #define BT_RST_DONE BIT(8) 90 91 /* CHISR have the same bits field definition with CHIER */ 92 #define MTK_REG_CHISR 0x10 93 #define MTK_REG_CHIER 0x14 94 #define FW_OWN_BACK_INT BIT(0) 95 #define RX_DONE_INT BIT(1) 96 #define TX_EMPTY BIT(2) 97 #define TX_FIFO_OVERFLOW BIT(8) 98 #define FW_MAILBOX_INT BIT(15) 99 #define INT_MASK GENMASK(15, 0) 100 #define RX_PKT_LEN GENMASK(31, 16) 101 102 #define MTK_REG_CSICR 0xc0 103 #define CSICR_CLR_MBOX_ACK BIT(0) 104 #define MTK_REG_PH2DSM0R 0xc4 105 #define PH2DSM0R_DRIVER_OWN BIT(0) 106 #define MTK_REG_PD2HRM0R 0xdc 107 #define PD2HRM0R_DRV_OWN BIT(0) 108 109 #define MTK_REG_CTDR 0x18 110 111 #define MTK_REG_CRDR 0x1c 112 113 #define MTK_REG_CRPLR 0x24 114 115 #define MTK_SDIO_BLOCK_SIZE 256 116 117 #define BTMTKSDIO_TX_WAIT_VND_EVT 1 118 #define BTMTKSDIO_HW_TX_READY 2 119 #define BTMTKSDIO_FUNC_ENABLED 3 120 #define BTMTKSDIO_PATCH_ENABLED 4 121 #define BTMTKSDIO_HW_RESET_ACTIVE 5 122 #define BTMTKSDIO_BT_WAKE_ENABLED 6 123 124 struct mtkbtsdio_hdr { 125 __le16 len; 126 __le16 reserved; 127 u8 bt_type; 128 } __packed; 129 130 struct btmtksdio_dev { 131 struct hci_dev *hdev; 132 struct sdio_func *func; 133 struct device *dev; 134 135 struct work_struct txrx_work; 136 unsigned long tx_state; 137 struct sk_buff_head txq; 138 139 struct sk_buff *evt_skb; 140 141 const struct btmtksdio_data *data; 142 143 struct gpio_desc *reset; 144 }; 145 146 static int mtk_hci_wmt_sync(struct hci_dev *hdev, 147 struct btmtk_hci_wmt_params *wmt_params) 148 { 149 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 150 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc; 151 struct btmtk_hci_wmt_evt_reg *wmt_evt_reg; 152 u32 hlen, status = BTMTK_WMT_INVALID; 153 struct btmtk_hci_wmt_evt *wmt_evt; 154 struct btmtk_hci_wmt_cmd *wc; 155 struct btmtk_wmt_hdr *hdr; 156 int err; 157 158 /* Send the WMT command and wait until the WMT event returns */ 159 hlen = sizeof(*hdr) + wmt_params->dlen; 160 if (hlen > 255) 161 return -EINVAL; 162 163 wc = kzalloc(hlen, GFP_KERNEL); 164 if (!wc) 165 return -ENOMEM; 166 167 hdr = &wc->hdr; 168 hdr->dir = 1; 169 hdr->op = wmt_params->op; 170 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1); 171 hdr->flag = wmt_params->flag; 172 memcpy(wc->data, wmt_params->data, wmt_params->dlen); 173 174 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 175 176 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc); 177 if (err < 0) { 178 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 179 goto err_free_wc; 180 } 181 182 /* The vendor specific WMT commands are all answered by a vendor 183 * specific event and will not have the Command Status or Command 184 * Complete as with usual HCI command flow control. 185 * 186 * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT 187 * state to be cleared. The driver specific event receive routine 188 * will clear that state and with that indicate completion of the 189 * WMT command. 190 */ 191 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT, 192 TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT); 193 if (err == -EINTR) { 194 bt_dev_err(hdev, "Execution of wmt command interrupted"); 195 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 196 goto err_free_wc; 197 } 198 199 if (err) { 200 bt_dev_err(hdev, "Execution of wmt command timed out"); 201 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state); 202 err = -ETIMEDOUT; 203 goto err_free_wc; 204 } 205 206 /* Parse and handle the return WMT event */ 207 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data; 208 if (wmt_evt->whdr.op != hdr->op) { 209 bt_dev_err(hdev, "Wrong op received %d expected %d", 210 wmt_evt->whdr.op, hdr->op); 211 err = -EIO; 212 goto err_free_skb; 213 } 214 215 switch (wmt_evt->whdr.op) { 216 case BTMTK_WMT_SEMAPHORE: 217 if (wmt_evt->whdr.flag == 2) 218 status = BTMTK_WMT_PATCH_UNDONE; 219 else 220 status = BTMTK_WMT_PATCH_DONE; 221 break; 222 case BTMTK_WMT_FUNC_CTRL: 223 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt; 224 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404) 225 status = BTMTK_WMT_ON_DONE; 226 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420) 227 status = BTMTK_WMT_ON_PROGRESS; 228 else 229 status = BTMTK_WMT_ON_UNDONE; 230 break; 231 case BTMTK_WMT_PATCH_DWNLD: 232 if (wmt_evt->whdr.flag == 2) 233 status = BTMTK_WMT_PATCH_DONE; 234 else if (wmt_evt->whdr.flag == 1) 235 status = BTMTK_WMT_PATCH_PROGRESS; 236 else 237 status = BTMTK_WMT_PATCH_UNDONE; 238 break; 239 case BTMTK_WMT_REGISTER: 240 wmt_evt_reg = (struct btmtk_hci_wmt_evt_reg *)wmt_evt; 241 if (le16_to_cpu(wmt_evt->whdr.dlen) == 12) 242 status = le32_to_cpu(wmt_evt_reg->val); 243 break; 244 } 245 246 if (wmt_params->status) 247 *wmt_params->status = status; 248 249 err_free_skb: 250 kfree_skb(bdev->evt_skb); 251 bdev->evt_skb = NULL; 252 err_free_wc: 253 kfree(wc); 254 255 return err; 256 } 257 258 static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev, 259 struct sk_buff *skb) 260 { 261 struct mtkbtsdio_hdr *sdio_hdr; 262 int err; 263 264 /* Make sure that there are enough rooms for SDIO header */ 265 if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) { 266 err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0, 267 GFP_ATOMIC); 268 if (err < 0) 269 return err; 270 } 271 272 /* Prepend MediaTek SDIO Specific Header */ 273 skb_push(skb, sizeof(*sdio_hdr)); 274 275 sdio_hdr = (void *)skb->data; 276 sdio_hdr->len = cpu_to_le16(skb->len); 277 sdio_hdr->reserved = cpu_to_le16(0); 278 sdio_hdr->bt_type = hci_skb_pkt_type(skb); 279 280 clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); 281 err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data, 282 round_up(skb->len, MTK_SDIO_BLOCK_SIZE)); 283 if (err < 0) 284 goto err_skb_pull; 285 286 bdev->hdev->stat.byte_tx += skb->len; 287 288 kfree_skb(skb); 289 290 return 0; 291 292 err_skb_pull: 293 skb_pull(skb, sizeof(*sdio_hdr)); 294 295 return err; 296 } 297 298 static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev) 299 { 300 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL); 301 } 302 303 static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev) 304 { 305 return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL); 306 } 307 308 static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev) 309 { 310 return sdio_readl(bdev->func, MTK_REG_CHCR, NULL); 311 } 312 313 static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev) 314 { 315 u32 status; 316 int err; 317 318 sdio_claim_host(bdev->func); 319 320 if (bdev->data->lp_mbox_supported && 321 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) { 322 sdio_writel(bdev->func, CSICR_CLR_MBOX_ACK, MTK_REG_CSICR, 323 &err); 324 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev, 325 status, !(status & PD2HRM0R_DRV_OWN), 326 2000, 1000000); 327 if (err < 0) { 328 bt_dev_err(bdev->hdev, "mailbox ACK not cleared"); 329 goto out; 330 } 331 } 332 333 /* Return ownership to the device */ 334 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err); 335 if (err < 0) 336 goto out; 337 338 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, 339 !(status & C_COM_DRV_OWN), 2000, 1000000); 340 341 out: 342 sdio_release_host(bdev->func); 343 344 if (err < 0) 345 bt_dev_err(bdev->hdev, "Cannot return ownership to device"); 346 347 return err; 348 } 349 350 static int btmtksdio_drv_pmctrl(struct btmtksdio_dev *bdev) 351 { 352 u32 status; 353 int err; 354 355 sdio_claim_host(bdev->func); 356 357 /* Get ownership from the device */ 358 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err); 359 if (err < 0) 360 goto out; 361 362 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status, 363 status & C_COM_DRV_OWN, 2000, 1000000); 364 365 if (!err && bdev->data->lp_mbox_supported && 366 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) 367 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev, 368 status, status & PD2HRM0R_DRV_OWN, 369 2000, 1000000); 370 371 out: 372 sdio_release_host(bdev->func); 373 374 if (err < 0) 375 bt_dev_err(bdev->hdev, "Cannot get ownership from device"); 376 377 return err; 378 } 379 380 static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb) 381 { 382 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 383 struct hci_event_hdr *hdr = (void *)skb->data; 384 u8 evt = hdr->evt; 385 int err; 386 387 /* When someone waits for the WMT event, the skb is being cloned 388 * and being processed the events from there then. 389 */ 390 if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) { 391 bdev->evt_skb = skb_clone(skb, GFP_KERNEL); 392 if (!bdev->evt_skb) { 393 err = -ENOMEM; 394 goto err_out; 395 } 396 } 397 398 err = hci_recv_frame(hdev, skb); 399 if (err < 0) 400 goto err_free_skb; 401 402 if (evt == HCI_EV_WMT) { 403 if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, 404 &bdev->tx_state)) { 405 /* Barrier to sync with other CPUs */ 406 smp_mb__after_atomic(); 407 wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT); 408 } 409 } 410 411 return 0; 412 413 err_free_skb: 414 kfree_skb(bdev->evt_skb); 415 bdev->evt_skb = NULL; 416 417 err_out: 418 return err; 419 } 420 421 static int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) 422 { 423 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 424 u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle); 425 426 switch (handle) { 427 case 0xfc6f: 428 /* Firmware dump from device: when the firmware hangs, the 429 * device can no longer suspend and thus disable auto-suspend. 430 */ 431 pm_runtime_forbid(bdev->dev); 432 fallthrough; 433 case 0x05ff: 434 case 0x05fe: 435 /* Firmware debug logging */ 436 return hci_recv_diag(hdev, skb); 437 } 438 439 return hci_recv_frame(hdev, skb); 440 } 441 442 static const struct h4_recv_pkt mtk_recv_pkts[] = { 443 { H4_RECV_ACL, .recv = btmtksdio_recv_acl }, 444 { H4_RECV_SCO, .recv = hci_recv_frame }, 445 { H4_RECV_EVENT, .recv = btmtksdio_recv_event }, 446 }; 447 448 static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size) 449 { 450 const struct h4_recv_pkt *pkts = mtk_recv_pkts; 451 int pkts_count = ARRAY_SIZE(mtk_recv_pkts); 452 struct mtkbtsdio_hdr *sdio_hdr; 453 int err, i, pad_size; 454 struct sk_buff *skb; 455 u16 dlen; 456 457 if (rx_size < sizeof(*sdio_hdr)) 458 return -EILSEQ; 459 460 /* A SDIO packet is exactly containing a Bluetooth packet */ 461 skb = bt_skb_alloc(rx_size, GFP_KERNEL); 462 if (!skb) 463 return -ENOMEM; 464 465 skb_put(skb, rx_size); 466 467 err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size); 468 if (err < 0) 469 goto err_kfree_skb; 470 471 sdio_hdr = (void *)skb->data; 472 473 /* We assume the default error as -EILSEQ simply to make the error path 474 * be cleaner. 475 */ 476 err = -EILSEQ; 477 478 if (rx_size != le16_to_cpu(sdio_hdr->len)) { 479 bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched "); 480 goto err_kfree_skb; 481 } 482 483 hci_skb_pkt_type(skb) = sdio_hdr->bt_type; 484 485 /* Remove MediaTek SDIO header */ 486 skb_pull(skb, sizeof(*sdio_hdr)); 487 488 /* We have to dig into the packet to get payload size and then know how 489 * many padding bytes at the tail, these padding bytes should be removed 490 * before the packet is indicated to the core layer. 491 */ 492 for (i = 0; i < pkts_count; i++) { 493 if (sdio_hdr->bt_type == (&pkts[i])->type) 494 break; 495 } 496 497 if (i >= pkts_count) { 498 bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x", 499 sdio_hdr->bt_type); 500 goto err_kfree_skb; 501 } 502 503 /* Remaining bytes cannot hold a header*/ 504 if (skb->len < (&pkts[i])->hlen) { 505 bt_dev_err(bdev->hdev, "The size of bt header is mismatched"); 506 goto err_kfree_skb; 507 } 508 509 switch ((&pkts[i])->lsize) { 510 case 1: 511 dlen = skb->data[(&pkts[i])->loff]; 512 break; 513 case 2: 514 dlen = get_unaligned_le16(skb->data + 515 (&pkts[i])->loff); 516 break; 517 default: 518 goto err_kfree_skb; 519 } 520 521 pad_size = skb->len - (&pkts[i])->hlen - dlen; 522 523 /* Remaining bytes cannot hold a payload */ 524 if (pad_size < 0) { 525 bt_dev_err(bdev->hdev, "The size of bt payload is mismatched"); 526 goto err_kfree_skb; 527 } 528 529 /* Remove padding bytes */ 530 skb_trim(skb, skb->len - pad_size); 531 532 /* Complete frame */ 533 (&pkts[i])->recv(bdev->hdev, skb); 534 535 bdev->hdev->stat.byte_rx += rx_size; 536 537 return 0; 538 539 err_kfree_skb: 540 kfree_skb(skb); 541 542 return err; 543 } 544 545 static void btmtksdio_txrx_work(struct work_struct *work) 546 { 547 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev, 548 txrx_work); 549 unsigned long txrx_timeout; 550 u32 int_status, rx_size; 551 struct sk_buff *skb; 552 int err; 553 554 pm_runtime_get_sync(bdev->dev); 555 556 sdio_claim_host(bdev->func); 557 558 /* Disable interrupt */ 559 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 560 561 txrx_timeout = jiffies + 5 * HZ; 562 563 do { 564 int_status = sdio_readl(bdev->func, MTK_REG_CHISR, NULL); 565 566 /* Ack an interrupt as soon as possible before any operation on 567 * hardware. 568 * 569 * Note that we don't ack any status during operations to avoid race 570 * condition between the host and the device such as it's possible to 571 * mistakenly ack RX_DONE for the next packet and then cause interrupts 572 * not be raised again but there is still pending data in the hardware 573 * FIFO. 574 */ 575 sdio_writel(bdev->func, int_status, MTK_REG_CHISR, NULL); 576 int_status &= INT_MASK; 577 578 if ((int_status & FW_MAILBOX_INT) && 579 bdev->data->chipid == 0x7921) { 580 sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN, 581 MTK_REG_PH2DSM0R, NULL); 582 } 583 584 if (int_status & FW_OWN_BACK_INT) 585 bt_dev_dbg(bdev->hdev, "Get fw own back"); 586 587 if (int_status & TX_EMPTY) 588 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); 589 590 else if (unlikely(int_status & TX_FIFO_OVERFLOW)) 591 bt_dev_warn(bdev->hdev, "Tx fifo overflow"); 592 593 if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) { 594 skb = skb_dequeue(&bdev->txq); 595 if (skb) { 596 err = btmtksdio_tx_packet(bdev, skb); 597 if (err < 0) { 598 bdev->hdev->stat.err_tx++; 599 skb_queue_head(&bdev->txq, skb); 600 } 601 } 602 } 603 604 if (int_status & RX_DONE_INT) { 605 rx_size = sdio_readl(bdev->func, MTK_REG_CRPLR, NULL); 606 rx_size = (rx_size & RX_PKT_LEN) >> 16; 607 if (btmtksdio_rx_packet(bdev, rx_size) < 0) 608 bdev->hdev->stat.err_rx++; 609 } 610 } while (int_status || time_is_before_jiffies(txrx_timeout)); 611 612 /* Enable interrupt */ 613 if (bdev->func->irq_handler) 614 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL); 615 616 sdio_release_host(bdev->func); 617 618 pm_runtime_mark_last_busy(bdev->dev); 619 pm_runtime_put_autosuspend(bdev->dev); 620 } 621 622 static void btmtksdio_interrupt(struct sdio_func *func) 623 { 624 struct btmtksdio_dev *bdev = sdio_get_drvdata(func); 625 626 if (test_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state)) { 627 if (bdev->hdev->suspended) 628 pm_wakeup_event(bdev->dev, 0); 629 clear_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state); 630 } 631 632 /* Disable interrupt */ 633 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 634 635 schedule_work(&bdev->txrx_work); 636 } 637 638 static int btmtksdio_open(struct hci_dev *hdev) 639 { 640 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 641 u32 val; 642 int err; 643 644 sdio_claim_host(bdev->func); 645 646 err = sdio_enable_func(bdev->func); 647 if (err < 0) 648 goto err_release_host; 649 650 set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); 651 652 err = btmtksdio_drv_pmctrl(bdev); 653 if (err < 0) 654 goto err_disable_func; 655 656 /* Disable interrupt & mask out all interrupt sources */ 657 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err); 658 if (err < 0) 659 goto err_disable_func; 660 661 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err); 662 if (err < 0) 663 goto err_disable_func; 664 665 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt); 666 if (err < 0) 667 goto err_disable_func; 668 669 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE); 670 if (err < 0) 671 goto err_release_irq; 672 673 /* SDIO CMD 5 allows the SDIO device back to idle state an 674 * synchronous interrupt is supported in SDIO 4-bit mode 675 */ 676 val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err); 677 if (err < 0) 678 goto err_release_irq; 679 680 val |= SDIO_INT_CTL; 681 sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err); 682 if (err < 0) 683 goto err_release_irq; 684 685 /* Explicitly set write-1-clear method */ 686 val = sdio_readl(bdev->func, MTK_REG_CHCR, &err); 687 if (err < 0) 688 goto err_release_irq; 689 690 val |= C_INT_CLR_CTRL; 691 sdio_writel(bdev->func, val, MTK_REG_CHCR, &err); 692 if (err < 0) 693 goto err_release_irq; 694 695 /* Setup interrupt sources */ 696 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW, 697 MTK_REG_CHIER, &err); 698 if (err < 0) 699 goto err_release_irq; 700 701 /* Enable interrupt */ 702 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err); 703 if (err < 0) 704 goto err_release_irq; 705 706 sdio_release_host(bdev->func); 707 708 return 0; 709 710 err_release_irq: 711 sdio_release_irq(bdev->func); 712 713 err_disable_func: 714 sdio_disable_func(bdev->func); 715 716 err_release_host: 717 sdio_release_host(bdev->func); 718 719 return err; 720 } 721 722 static int btmtksdio_close(struct hci_dev *hdev) 723 { 724 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 725 726 /* Skip btmtksdio_close if BTMTKSDIO_FUNC_ENABLED isn't set */ 727 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 728 return 0; 729 730 sdio_claim_host(bdev->func); 731 732 /* Disable interrupt */ 733 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 734 735 sdio_release_irq(bdev->func); 736 737 cancel_work_sync(&bdev->txrx_work); 738 739 btmtksdio_fw_pmctrl(bdev); 740 741 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); 742 sdio_disable_func(bdev->func); 743 744 sdio_release_host(bdev->func); 745 746 return 0; 747 } 748 749 static int btmtksdio_flush(struct hci_dev *hdev) 750 { 751 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 752 753 skb_queue_purge(&bdev->txq); 754 755 cancel_work_sync(&bdev->txrx_work); 756 757 return 0; 758 } 759 760 static int btmtksdio_func_query(struct hci_dev *hdev) 761 { 762 struct btmtk_hci_wmt_params wmt_params; 763 int status, err; 764 u8 param = 0; 765 766 /* Query whether the function is enabled */ 767 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 768 wmt_params.flag = 4; 769 wmt_params.dlen = sizeof(param); 770 wmt_params.data = ¶m; 771 wmt_params.status = &status; 772 773 err = mtk_hci_wmt_sync(hdev, &wmt_params); 774 if (err < 0) { 775 bt_dev_err(hdev, "Failed to query function status (%d)", err); 776 return err; 777 } 778 779 return status; 780 } 781 782 static int mt76xx_setup(struct hci_dev *hdev, const char *fwname) 783 { 784 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 785 struct btmtk_hci_wmt_params wmt_params; 786 struct btmtk_tci_sleep tci_sleep; 787 struct sk_buff *skb; 788 int err, status; 789 u8 param = 0x1; 790 791 /* Query whether the firmware is already download */ 792 wmt_params.op = BTMTK_WMT_SEMAPHORE; 793 wmt_params.flag = 1; 794 wmt_params.dlen = 0; 795 wmt_params.data = NULL; 796 wmt_params.status = &status; 797 798 err = mtk_hci_wmt_sync(hdev, &wmt_params); 799 if (err < 0) { 800 bt_dev_err(hdev, "Failed to query firmware status (%d)", err); 801 return err; 802 } 803 804 if (status == BTMTK_WMT_PATCH_DONE) { 805 bt_dev_info(hdev, "Firmware already downloaded"); 806 goto ignore_setup_fw; 807 } 808 809 /* Setup a firmware which the device definitely requires */ 810 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync); 811 if (err < 0) 812 return err; 813 814 ignore_setup_fw: 815 /* Query whether the device is already enabled */ 816 err = readx_poll_timeout(btmtksdio_func_query, hdev, status, 817 status < 0 || status != BTMTK_WMT_ON_PROGRESS, 818 2000, 5000000); 819 /* -ETIMEDOUT happens */ 820 if (err < 0) 821 return err; 822 823 /* The other errors happen in btusb_mtk_func_query */ 824 if (status < 0) 825 return status; 826 827 if (status == BTMTK_WMT_ON_DONE) { 828 bt_dev_info(hdev, "function already on"); 829 goto ignore_func_on; 830 } 831 832 /* Enable Bluetooth protocol */ 833 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 834 wmt_params.flag = 0; 835 wmt_params.dlen = sizeof(param); 836 wmt_params.data = ¶m; 837 wmt_params.status = NULL; 838 839 err = mtk_hci_wmt_sync(hdev, &wmt_params); 840 if (err < 0) { 841 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 842 return err; 843 } 844 845 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 846 847 ignore_func_on: 848 /* Apply the low power environment setup */ 849 tci_sleep.mode = 0x5; 850 tci_sleep.duration = cpu_to_le16(0x640); 851 tci_sleep.host_duration = cpu_to_le16(0x640); 852 tci_sleep.host_wakeup_pin = 0; 853 tci_sleep.time_compensation = 0; 854 855 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep, 856 HCI_INIT_TIMEOUT); 857 if (IS_ERR(skb)) { 858 err = PTR_ERR(skb); 859 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err); 860 return err; 861 } 862 kfree_skb(skb); 863 864 return 0; 865 } 866 867 static int mt79xx_setup(struct hci_dev *hdev, const char *fwname) 868 { 869 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 870 struct btmtk_hci_wmt_params wmt_params; 871 u8 param = 0x1; 872 int err; 873 874 err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync); 875 if (err < 0) { 876 bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err); 877 return err; 878 } 879 880 err = btmtksdio_fw_pmctrl(bdev); 881 if (err < 0) 882 return err; 883 884 err = btmtksdio_drv_pmctrl(bdev); 885 if (err < 0) 886 return err; 887 888 /* Enable Bluetooth protocol */ 889 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 890 wmt_params.flag = 0; 891 wmt_params.dlen = sizeof(param); 892 wmt_params.data = ¶m; 893 wmt_params.status = NULL; 894 895 err = mtk_hci_wmt_sync(hdev, &wmt_params); 896 if (err < 0) { 897 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 898 return err; 899 } 900 901 hci_set_msft_opcode(hdev, 0xFD30); 902 hci_set_aosp_capable(hdev); 903 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 904 905 return err; 906 } 907 908 static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val) 909 { 910 struct btmtk_hci_wmt_params wmt_params; 911 struct reg_read_cmd reg_read = { 912 .type = 1, 913 .num = 1, 914 }; 915 u32 status; 916 int err; 917 918 reg_read.addr = cpu_to_le32(reg); 919 wmt_params.op = BTMTK_WMT_REGISTER; 920 wmt_params.flag = BTMTK_WMT_REG_READ; 921 wmt_params.dlen = sizeof(reg_read); 922 wmt_params.data = ®_read; 923 wmt_params.status = &status; 924 925 err = mtk_hci_wmt_sync(hdev, &wmt_params); 926 if (err < 0) { 927 bt_dev_err(hdev, "Failed to read reg (%d)", err); 928 return err; 929 } 930 931 *val = status; 932 933 return err; 934 } 935 936 static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask) 937 { 938 struct btmtk_hci_wmt_params wmt_params; 939 const struct reg_write_cmd reg_write = { 940 .type = 1, 941 .num = 1, 942 .addr = cpu_to_le32(reg), 943 .data = cpu_to_le32(val), 944 .mask = cpu_to_le32(mask), 945 }; 946 int err, status; 947 948 wmt_params.op = BTMTK_WMT_REGISTER; 949 wmt_params.flag = BTMTK_WMT_REG_WRITE; 950 wmt_params.dlen = sizeof(reg_write); 951 wmt_params.data = ®_write; 952 wmt_params.status = &status; 953 954 err = mtk_hci_wmt_sync(hdev, &wmt_params); 955 if (err < 0) 956 bt_dev_err(hdev, "Failed to write reg (%d)", err); 957 958 return err; 959 } 960 961 static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id) 962 { 963 /* uses 1 as data path id for all the usecases */ 964 *data_path_id = 1; 965 return 0; 966 } 967 968 static int btmtksdio_get_codec_config_data(struct hci_dev *hdev, 969 __u8 link, struct bt_codec *codec, 970 __u8 *ven_len, __u8 **ven_data) 971 { 972 int err = 0; 973 974 if (!ven_data || !ven_len) 975 return -EINVAL; 976 977 *ven_len = 0; 978 *ven_data = NULL; 979 980 if (link != ESCO_LINK) { 981 bt_dev_err(hdev, "Invalid link type(%u)", link); 982 return -EINVAL; 983 } 984 985 *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL); 986 if (!*ven_data) { 987 err = -ENOMEM; 988 goto error; 989 } 990 991 /* supports only CVSD and mSBC offload codecs */ 992 switch (codec->id) { 993 case 0x02: 994 **ven_data = 0x00; 995 break; 996 case 0x05: 997 **ven_data = 0x01; 998 break; 999 default: 1000 err = -EINVAL; 1001 bt_dev_err(hdev, "Invalid codec id(%u)", codec->id); 1002 goto error; 1003 } 1004 /* codec and its capabilities are pre-defined to ids 1005 * preset id = 0x00 represents CVSD codec with sampling rate 8K 1006 * preset id = 0x01 represents mSBC codec with sampling rate 16K 1007 */ 1008 *ven_len = sizeof(__u8); 1009 return err; 1010 1011 error: 1012 kfree(*ven_data); 1013 *ven_data = NULL; 1014 return err; 1015 } 1016 1017 static int btmtksdio_sco_setting(struct hci_dev *hdev) 1018 { 1019 const struct btmtk_sco sco_setting = { 1020 .clock_config = 0x49, 1021 .channel_format_config = 0x80, 1022 }; 1023 struct sk_buff *skb; 1024 u32 val; 1025 int err; 1026 1027 /* Enable SCO over I2S/PCM for MediaTek chipset */ 1028 skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting), 1029 &sco_setting, HCI_CMD_TIMEOUT); 1030 if (IS_ERR(skb)) 1031 return PTR_ERR(skb); 1032 1033 kfree_skb(skb); 1034 1035 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val); 1036 if (err < 0) 1037 return err; 1038 1039 val |= 0x11000000; 1040 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0); 1041 if (err < 0) 1042 return err; 1043 1044 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val); 1045 if (err < 0) 1046 return err; 1047 1048 val |= 0x00000101; 1049 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); 1050 if (err < 0) 1051 return err; 1052 1053 hdev->get_data_path_id = btmtksdio_get_data_path_id; 1054 hdev->get_codec_config_data = btmtksdio_get_codec_config_data; 1055 1056 return err; 1057 } 1058 1059 static int btmtksdio_reset_setting(struct hci_dev *hdev) 1060 { 1061 int err; 1062 u32 val; 1063 1064 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val); 1065 if (err < 0) 1066 return err; 1067 1068 val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */ 1069 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); 1070 if (err < 0) 1071 return err; 1072 1073 err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val); 1074 if (err < 0) 1075 return err; 1076 1077 val |= MT7921_BTSYS_RST_WITH_GPIO; 1078 return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0); 1079 } 1080 1081 static int btmtksdio_setup(struct hci_dev *hdev) 1082 { 1083 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1084 ktime_t calltime, delta, rettime; 1085 unsigned long long duration; 1086 char fwname[64]; 1087 int err, dev_id; 1088 u32 fw_version = 0, val; 1089 1090 calltime = ktime_get(); 1091 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); 1092 1093 switch (bdev->data->chipid) { 1094 case 0x7921: 1095 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) { 1096 err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS, 1097 &val); 1098 if (err < 0) 1099 return err; 1100 1101 val &= ~BT_DL_STATE; 1102 err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS, 1103 val, ~0); 1104 if (err < 0) 1105 return err; 1106 1107 btmtksdio_fw_pmctrl(bdev); 1108 msleep(20); 1109 btmtksdio_drv_pmctrl(bdev); 1110 1111 clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state); 1112 } 1113 1114 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id); 1115 if (err < 0) { 1116 bt_dev_err(hdev, "Failed to get device id (%d)", err); 1117 return err; 1118 } 1119 1120 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version); 1121 if (err < 0) { 1122 bt_dev_err(hdev, "Failed to get fw version (%d)", err); 1123 return err; 1124 } 1125 1126 btmtk_fw_get_filename(fwname, sizeof(fwname), dev_id, 1127 fw_version, 0); 1128 1129 snprintf(fwname, sizeof(fwname), 1130 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin", 1131 dev_id & 0xffff, (fw_version & 0xff) + 1); 1132 err = mt79xx_setup(hdev, fwname); 1133 if (err < 0) 1134 return err; 1135 1136 /* Enable SCO over I2S/PCM */ 1137 err = btmtksdio_sco_setting(hdev); 1138 if (err < 0) { 1139 bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err); 1140 return err; 1141 } 1142 1143 /* Enable WBS with mSBC codec */ 1144 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks); 1145 1146 /* Enable GPIO reset mechanism */ 1147 if (bdev->reset) { 1148 err = btmtksdio_reset_setting(hdev); 1149 if (err < 0) { 1150 bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err); 1151 devm_gpiod_put(bdev->dev, bdev->reset); 1152 bdev->reset = NULL; 1153 } 1154 } 1155 1156 break; 1157 case 0x7663: 1158 case 0x7668: 1159 err = mt76xx_setup(hdev, bdev->data->fwname); 1160 if (err < 0) 1161 return err; 1162 break; 1163 default: 1164 return -ENODEV; 1165 } 1166 1167 rettime = ktime_get(); 1168 delta = ktime_sub(rettime, calltime); 1169 duration = (unsigned long long)ktime_to_ns(delta) >> 10; 1170 1171 pm_runtime_set_autosuspend_delay(bdev->dev, 1172 MTKBTSDIO_AUTOSUSPEND_DELAY); 1173 pm_runtime_use_autosuspend(bdev->dev); 1174 1175 err = pm_runtime_set_active(bdev->dev); 1176 if (err < 0) 1177 return err; 1178 1179 /* Default forbid runtime auto suspend, that can be allowed by 1180 * enable_autosuspend flag or the PM runtime entry under sysfs. 1181 */ 1182 pm_runtime_forbid(bdev->dev); 1183 pm_runtime_enable(bdev->dev); 1184 1185 if (enable_autosuspend) 1186 pm_runtime_allow(bdev->dev); 1187 1188 bt_dev_info(hdev, "Device setup in %llu usecs", duration); 1189 1190 return 0; 1191 } 1192 1193 static int btmtksdio_shutdown(struct hci_dev *hdev) 1194 { 1195 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1196 struct btmtk_hci_wmt_params wmt_params; 1197 u8 param = 0x0; 1198 int err; 1199 1200 /* Get back the state to be consistent with the state 1201 * in btmtksdio_setup. 1202 */ 1203 pm_runtime_get_sync(bdev->dev); 1204 1205 /* wmt command only works until the reset is complete */ 1206 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) 1207 goto ignore_wmt_cmd; 1208 1209 /* Disable the device */ 1210 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 1211 wmt_params.flag = 0; 1212 wmt_params.dlen = sizeof(param); 1213 wmt_params.data = ¶m; 1214 wmt_params.status = NULL; 1215 1216 err = mtk_hci_wmt_sync(hdev, &wmt_params); 1217 if (err < 0) { 1218 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 1219 return err; 1220 } 1221 1222 ignore_wmt_cmd: 1223 pm_runtime_put_noidle(bdev->dev); 1224 pm_runtime_disable(bdev->dev); 1225 1226 return 0; 1227 } 1228 1229 static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 1230 { 1231 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1232 1233 switch (hci_skb_pkt_type(skb)) { 1234 case HCI_COMMAND_PKT: 1235 hdev->stat.cmd_tx++; 1236 break; 1237 1238 case HCI_ACLDATA_PKT: 1239 hdev->stat.acl_tx++; 1240 break; 1241 1242 case HCI_SCODATA_PKT: 1243 hdev->stat.sco_tx++; 1244 break; 1245 1246 default: 1247 return -EILSEQ; 1248 } 1249 1250 skb_queue_tail(&bdev->txq, skb); 1251 1252 schedule_work(&bdev->txrx_work); 1253 1254 return 0; 1255 } 1256 1257 static void btmtksdio_reset(struct hci_dev *hdev) 1258 { 1259 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1260 u32 status; 1261 int err; 1262 1263 if (!bdev->reset || bdev->data->chipid != 0x7921) 1264 return; 1265 1266 pm_runtime_get_sync(bdev->dev); 1267 1268 if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) 1269 return; 1270 1271 sdio_claim_host(bdev->func); 1272 1273 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 1274 skb_queue_purge(&bdev->txq); 1275 cancel_work_sync(&bdev->txrx_work); 1276 1277 gpiod_set_value_cansleep(bdev->reset, 1); 1278 msleep(100); 1279 gpiod_set_value_cansleep(bdev->reset, 0); 1280 1281 err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status, 1282 status & BT_RST_DONE, 100000, 2000000); 1283 if (err < 0) { 1284 bt_dev_err(hdev, "Failed to reset (%d)", err); 1285 goto err; 1286 } 1287 1288 clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 1289 err: 1290 sdio_release_host(bdev->func); 1291 1292 pm_runtime_put_noidle(bdev->dev); 1293 pm_runtime_disable(bdev->dev); 1294 1295 hci_reset_dev(hdev); 1296 } 1297 1298 static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev) 1299 { 1300 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1301 1302 return device_may_wakeup(bdev->dev); 1303 } 1304 1305 static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev) 1306 { 1307 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1308 bool may_wakeup = device_may_wakeup(bdev->dev); 1309 const struct btmtk_wakeon bt_awake = { 1310 .mode = 0x1, 1311 .gpo = 0, 1312 .active_high = 0x1, 1313 .enable_delay = cpu_to_le16(0xc80), 1314 .wakeup_delay = cpu_to_le16(0x20), 1315 }; 1316 1317 if (may_wakeup && bdev->data->chipid == 0x7921) { 1318 struct sk_buff *skb; 1319 1320 skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake), 1321 &bt_awake, HCI_CMD_TIMEOUT); 1322 if (IS_ERR(skb)) 1323 may_wakeup = false; 1324 else 1325 kfree_skb(skb); 1326 } 1327 1328 return may_wakeup; 1329 } 1330 1331 static int btmtksdio_probe(struct sdio_func *func, 1332 const struct sdio_device_id *id) 1333 { 1334 struct btmtksdio_dev *bdev; 1335 struct hci_dev *hdev; 1336 struct device_node *old_node; 1337 bool restore_node; 1338 int err; 1339 1340 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL); 1341 if (!bdev) 1342 return -ENOMEM; 1343 1344 bdev->data = (void *)id->driver_data; 1345 if (!bdev->data) 1346 return -ENODEV; 1347 1348 bdev->dev = &func->dev; 1349 bdev->func = func; 1350 1351 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work); 1352 skb_queue_head_init(&bdev->txq); 1353 1354 /* Initialize and register HCI device */ 1355 hdev = hci_alloc_dev(); 1356 if (!hdev) { 1357 dev_err(&func->dev, "Can't allocate HCI device\n"); 1358 return -ENOMEM; 1359 } 1360 1361 bdev->hdev = hdev; 1362 1363 hdev->bus = HCI_SDIO; 1364 hci_set_drvdata(hdev, bdev); 1365 1366 hdev->open = btmtksdio_open; 1367 hdev->close = btmtksdio_close; 1368 hdev->reset = btmtksdio_reset; 1369 hdev->flush = btmtksdio_flush; 1370 hdev->setup = btmtksdio_setup; 1371 hdev->shutdown = btmtksdio_shutdown; 1372 hdev->send = btmtksdio_send_frame; 1373 hdev->wakeup = btmtksdio_sdio_wakeup; 1374 /* 1375 * If SDIO controller supports wake on Bluetooth, sending a wakeon 1376 * command is not necessary. 1377 */ 1378 if (device_can_wakeup(func->card->host->parent)) 1379 hdev->wakeup = btmtksdio_sdio_inband_wakeup; 1380 else 1381 hdev->wakeup = btmtksdio_sdio_wakeup; 1382 hdev->set_bdaddr = btmtk_set_bdaddr; 1383 1384 SET_HCIDEV_DEV(hdev, &func->dev); 1385 1386 hdev->manufacturer = 70; 1387 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); 1388 1389 sdio_set_drvdata(func, bdev); 1390 1391 err = hci_register_dev(hdev); 1392 if (err < 0) { 1393 dev_err(&func->dev, "Can't register HCI device\n"); 1394 hci_free_dev(hdev); 1395 return err; 1396 } 1397 1398 /* pm_runtime_enable would be done after the firmware is being 1399 * downloaded because the core layer probably already enables 1400 * runtime PM for this func such as the case host->caps & 1401 * MMC_CAP_POWER_OFF_CARD. 1402 */ 1403 if (pm_runtime_enabled(bdev->dev)) 1404 pm_runtime_disable(bdev->dev); 1405 1406 /* As explanation in drivers/mmc/core/sdio_bus.c tells us: 1407 * Unbound SDIO functions are always suspended. 1408 * During probe, the function is set active and the usage count 1409 * is incremented. If the driver supports runtime PM, 1410 * it should call pm_runtime_put_noidle() in its probe routine and 1411 * pm_runtime_get_noresume() in its remove routine. 1412 * 1413 * So, put a pm_runtime_put_noidle here ! 1414 */ 1415 pm_runtime_put_noidle(bdev->dev); 1416 1417 err = devm_device_init_wakeup(bdev->dev); 1418 if (err) 1419 bt_dev_err(hdev, "failed to initialize device wakeup"); 1420 1421 restore_node = false; 1422 if (!of_device_is_compatible(bdev->dev->of_node, "mediatek,mt7921s-bluetooth")) { 1423 restore_node = true; 1424 old_node = bdev->dev->of_node; 1425 bdev->dev->of_node = of_find_compatible_node(NULL, NULL, 1426 "mediatek,mt7921s-bluetooth"); 1427 } 1428 1429 bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset", 1430 GPIOD_OUT_LOW); 1431 if (IS_ERR(bdev->reset)) 1432 err = PTR_ERR(bdev->reset); 1433 1434 if (restore_node) { 1435 of_node_put(bdev->dev->of_node); 1436 bdev->dev->of_node = old_node; 1437 } 1438 1439 return err; 1440 } 1441 1442 static void btmtksdio_remove(struct sdio_func *func) 1443 { 1444 struct btmtksdio_dev *bdev = sdio_get_drvdata(func); 1445 struct hci_dev *hdev; 1446 1447 if (!bdev) 1448 return; 1449 1450 hdev = bdev->hdev; 1451 1452 /* Make sure to call btmtksdio_close before removing sdio card */ 1453 if (test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1454 btmtksdio_close(hdev); 1455 1456 /* Be consistent the state in btmtksdio_probe */ 1457 pm_runtime_get_noresume(bdev->dev); 1458 1459 sdio_set_drvdata(func, NULL); 1460 hci_unregister_dev(hdev); 1461 hci_free_dev(hdev); 1462 } 1463 1464 #ifdef CONFIG_PM 1465 static int btmtksdio_runtime_suspend(struct device *dev) 1466 { 1467 struct sdio_func *func = dev_to_sdio_func(dev); 1468 struct btmtksdio_dev *bdev; 1469 int err; 1470 1471 bdev = sdio_get_drvdata(func); 1472 if (!bdev) 1473 return 0; 1474 1475 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1476 return 0; 1477 1478 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 1479 1480 err = btmtksdio_fw_pmctrl(bdev); 1481 1482 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err); 1483 1484 return err; 1485 } 1486 1487 static int btmtksdio_system_suspend(struct device *dev) 1488 { 1489 struct sdio_func *func = dev_to_sdio_func(dev); 1490 struct btmtksdio_dev *bdev; 1491 1492 bdev = sdio_get_drvdata(func); 1493 if (!bdev) 1494 return 0; 1495 1496 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1497 return 0; 1498 1499 set_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state); 1500 1501 return btmtksdio_runtime_suspend(dev); 1502 } 1503 1504 static int btmtksdio_runtime_resume(struct device *dev) 1505 { 1506 struct sdio_func *func = dev_to_sdio_func(dev); 1507 struct btmtksdio_dev *bdev; 1508 int err; 1509 1510 bdev = sdio_get_drvdata(func); 1511 if (!bdev) 1512 return 0; 1513 1514 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1515 return 0; 1516 1517 err = btmtksdio_drv_pmctrl(bdev); 1518 1519 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err); 1520 1521 return err; 1522 } 1523 1524 static int btmtksdio_system_resume(struct device *dev) 1525 { 1526 return btmtksdio_runtime_resume(dev); 1527 } 1528 1529 static const struct dev_pm_ops btmtksdio_pm_ops = { 1530 SYSTEM_SLEEP_PM_OPS(btmtksdio_system_suspend, btmtksdio_system_resume) 1531 RUNTIME_PM_OPS(btmtksdio_runtime_suspend, btmtksdio_runtime_resume, NULL) 1532 }; 1533 1534 #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops) 1535 #else /* CONFIG_PM */ 1536 #define BTMTKSDIO_PM_OPS NULL 1537 #endif /* CONFIG_PM */ 1538 1539 static struct sdio_driver btmtksdio_driver = { 1540 .name = "btmtksdio", 1541 .probe = btmtksdio_probe, 1542 .remove = btmtksdio_remove, 1543 .id_table = btmtksdio_table, 1544 .drv = { 1545 .pm = BTMTKSDIO_PM_OPS, 1546 } 1547 }; 1548 1549 module_sdio_driver(btmtksdio_driver); 1550 1551 module_param(enable_autosuspend, bool, 0644); 1552 MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default"); 1553 1554 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); 1555 MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION); 1556 MODULE_VERSION(VERSION); 1557 MODULE_LICENSE("GPL"); 1558