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 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL); 614 615 sdio_release_host(bdev->func); 616 617 pm_runtime_mark_last_busy(bdev->dev); 618 pm_runtime_put_autosuspend(bdev->dev); 619 } 620 621 static void btmtksdio_interrupt(struct sdio_func *func) 622 { 623 struct btmtksdio_dev *bdev = sdio_get_drvdata(func); 624 625 if (test_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state)) { 626 if (bdev->hdev->suspended) 627 pm_wakeup_event(bdev->dev, 0); 628 clear_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state); 629 } 630 631 /* Disable interrupt */ 632 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 633 634 schedule_work(&bdev->txrx_work); 635 } 636 637 static int btmtksdio_open(struct hci_dev *hdev) 638 { 639 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 640 u32 val; 641 int err; 642 643 sdio_claim_host(bdev->func); 644 645 err = sdio_enable_func(bdev->func); 646 if (err < 0) 647 goto err_release_host; 648 649 set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); 650 651 err = btmtksdio_drv_pmctrl(bdev); 652 if (err < 0) 653 goto err_disable_func; 654 655 /* Disable interrupt & mask out all interrupt sources */ 656 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err); 657 if (err < 0) 658 goto err_disable_func; 659 660 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err); 661 if (err < 0) 662 goto err_disable_func; 663 664 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt); 665 if (err < 0) 666 goto err_disable_func; 667 668 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE); 669 if (err < 0) 670 goto err_release_irq; 671 672 /* SDIO CMD 5 allows the SDIO device back to idle state an 673 * synchronous interrupt is supported in SDIO 4-bit mode 674 */ 675 val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err); 676 if (err < 0) 677 goto err_release_irq; 678 679 val |= SDIO_INT_CTL; 680 sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err); 681 if (err < 0) 682 goto err_release_irq; 683 684 /* Explicitly set write-1-clear method */ 685 val = sdio_readl(bdev->func, MTK_REG_CHCR, &err); 686 if (err < 0) 687 goto err_release_irq; 688 689 val |= C_INT_CLR_CTRL; 690 sdio_writel(bdev->func, val, MTK_REG_CHCR, &err); 691 if (err < 0) 692 goto err_release_irq; 693 694 /* Setup interrupt sources */ 695 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW, 696 MTK_REG_CHIER, &err); 697 if (err < 0) 698 goto err_release_irq; 699 700 /* Enable interrupt */ 701 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err); 702 if (err < 0) 703 goto err_release_irq; 704 705 sdio_release_host(bdev->func); 706 707 return 0; 708 709 err_release_irq: 710 sdio_release_irq(bdev->func); 711 712 err_disable_func: 713 sdio_disable_func(bdev->func); 714 715 err_release_host: 716 sdio_release_host(bdev->func); 717 718 return err; 719 } 720 721 static int btmtksdio_close(struct hci_dev *hdev) 722 { 723 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 724 725 sdio_claim_host(bdev->func); 726 727 /* Disable interrupt */ 728 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 729 730 sdio_release_irq(bdev->func); 731 732 cancel_work_sync(&bdev->txrx_work); 733 734 btmtksdio_fw_pmctrl(bdev); 735 736 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state); 737 sdio_disable_func(bdev->func); 738 739 sdio_release_host(bdev->func); 740 741 return 0; 742 } 743 744 static int btmtksdio_flush(struct hci_dev *hdev) 745 { 746 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 747 748 skb_queue_purge(&bdev->txq); 749 750 cancel_work_sync(&bdev->txrx_work); 751 752 return 0; 753 } 754 755 static int btmtksdio_func_query(struct hci_dev *hdev) 756 { 757 struct btmtk_hci_wmt_params wmt_params; 758 int status, err; 759 u8 param = 0; 760 761 /* Query whether the function is enabled */ 762 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 763 wmt_params.flag = 4; 764 wmt_params.dlen = sizeof(param); 765 wmt_params.data = ¶m; 766 wmt_params.status = &status; 767 768 err = mtk_hci_wmt_sync(hdev, &wmt_params); 769 if (err < 0) { 770 bt_dev_err(hdev, "Failed to query function status (%d)", err); 771 return err; 772 } 773 774 return status; 775 } 776 777 static int mt76xx_setup(struct hci_dev *hdev, const char *fwname) 778 { 779 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 780 struct btmtk_hci_wmt_params wmt_params; 781 struct btmtk_tci_sleep tci_sleep; 782 struct sk_buff *skb; 783 int err, status; 784 u8 param = 0x1; 785 786 /* Query whether the firmware is already download */ 787 wmt_params.op = BTMTK_WMT_SEMAPHORE; 788 wmt_params.flag = 1; 789 wmt_params.dlen = 0; 790 wmt_params.data = NULL; 791 wmt_params.status = &status; 792 793 err = mtk_hci_wmt_sync(hdev, &wmt_params); 794 if (err < 0) { 795 bt_dev_err(hdev, "Failed to query firmware status (%d)", err); 796 return err; 797 } 798 799 if (status == BTMTK_WMT_PATCH_DONE) { 800 bt_dev_info(hdev, "Firmware already downloaded"); 801 goto ignore_setup_fw; 802 } 803 804 /* Setup a firmware which the device definitely requires */ 805 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync); 806 if (err < 0) 807 return err; 808 809 ignore_setup_fw: 810 /* Query whether the device is already enabled */ 811 err = readx_poll_timeout(btmtksdio_func_query, hdev, status, 812 status < 0 || status != BTMTK_WMT_ON_PROGRESS, 813 2000, 5000000); 814 /* -ETIMEDOUT happens */ 815 if (err < 0) 816 return err; 817 818 /* The other errors happen in btusb_mtk_func_query */ 819 if (status < 0) 820 return status; 821 822 if (status == BTMTK_WMT_ON_DONE) { 823 bt_dev_info(hdev, "function already on"); 824 goto ignore_func_on; 825 } 826 827 /* Enable Bluetooth protocol */ 828 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 829 wmt_params.flag = 0; 830 wmt_params.dlen = sizeof(param); 831 wmt_params.data = ¶m; 832 wmt_params.status = NULL; 833 834 err = mtk_hci_wmt_sync(hdev, &wmt_params); 835 if (err < 0) { 836 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 837 return err; 838 } 839 840 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 841 842 ignore_func_on: 843 /* Apply the low power environment setup */ 844 tci_sleep.mode = 0x5; 845 tci_sleep.duration = cpu_to_le16(0x640); 846 tci_sleep.host_duration = cpu_to_le16(0x640); 847 tci_sleep.host_wakeup_pin = 0; 848 tci_sleep.time_compensation = 0; 849 850 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep, 851 HCI_INIT_TIMEOUT); 852 if (IS_ERR(skb)) { 853 err = PTR_ERR(skb); 854 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err); 855 return err; 856 } 857 kfree_skb(skb); 858 859 return 0; 860 } 861 862 static int mt79xx_setup(struct hci_dev *hdev, const char *fwname) 863 { 864 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 865 struct btmtk_hci_wmt_params wmt_params; 866 u8 param = 0x1; 867 int err; 868 869 err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync); 870 if (err < 0) { 871 bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err); 872 return err; 873 } 874 875 err = btmtksdio_fw_pmctrl(bdev); 876 if (err < 0) 877 return err; 878 879 err = btmtksdio_drv_pmctrl(bdev); 880 if (err < 0) 881 return err; 882 883 /* Enable Bluetooth protocol */ 884 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 885 wmt_params.flag = 0; 886 wmt_params.dlen = sizeof(param); 887 wmt_params.data = ¶m; 888 wmt_params.status = NULL; 889 890 err = mtk_hci_wmt_sync(hdev, &wmt_params); 891 if (err < 0) { 892 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 893 return err; 894 } 895 896 hci_set_msft_opcode(hdev, 0xFD30); 897 hci_set_aosp_capable(hdev); 898 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 899 900 return err; 901 } 902 903 static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val) 904 { 905 struct btmtk_hci_wmt_params wmt_params; 906 struct reg_read_cmd reg_read = { 907 .type = 1, 908 .num = 1, 909 }; 910 u32 status; 911 int err; 912 913 reg_read.addr = cpu_to_le32(reg); 914 wmt_params.op = BTMTK_WMT_REGISTER; 915 wmt_params.flag = BTMTK_WMT_REG_READ; 916 wmt_params.dlen = sizeof(reg_read); 917 wmt_params.data = ®_read; 918 wmt_params.status = &status; 919 920 err = mtk_hci_wmt_sync(hdev, &wmt_params); 921 if (err < 0) { 922 bt_dev_err(hdev, "Failed to read reg (%d)", err); 923 return err; 924 } 925 926 *val = status; 927 928 return err; 929 } 930 931 static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask) 932 { 933 struct btmtk_hci_wmt_params wmt_params; 934 const struct reg_write_cmd reg_write = { 935 .type = 1, 936 .num = 1, 937 .addr = cpu_to_le32(reg), 938 .data = cpu_to_le32(val), 939 .mask = cpu_to_le32(mask), 940 }; 941 int err, status; 942 943 wmt_params.op = BTMTK_WMT_REGISTER; 944 wmt_params.flag = BTMTK_WMT_REG_WRITE; 945 wmt_params.dlen = sizeof(reg_write); 946 wmt_params.data = ®_write; 947 wmt_params.status = &status; 948 949 err = mtk_hci_wmt_sync(hdev, &wmt_params); 950 if (err < 0) 951 bt_dev_err(hdev, "Failed to write reg (%d)", err); 952 953 return err; 954 } 955 956 static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id) 957 { 958 /* uses 1 as data path id for all the usecases */ 959 *data_path_id = 1; 960 return 0; 961 } 962 963 static int btmtksdio_get_codec_config_data(struct hci_dev *hdev, 964 __u8 link, struct bt_codec *codec, 965 __u8 *ven_len, __u8 **ven_data) 966 { 967 int err = 0; 968 969 if (!ven_data || !ven_len) 970 return -EINVAL; 971 972 *ven_len = 0; 973 *ven_data = NULL; 974 975 if (link != ESCO_LINK) { 976 bt_dev_err(hdev, "Invalid link type(%u)", link); 977 return -EINVAL; 978 } 979 980 *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL); 981 if (!*ven_data) { 982 err = -ENOMEM; 983 goto error; 984 } 985 986 /* supports only CVSD and mSBC offload codecs */ 987 switch (codec->id) { 988 case 0x02: 989 **ven_data = 0x00; 990 break; 991 case 0x05: 992 **ven_data = 0x01; 993 break; 994 default: 995 err = -EINVAL; 996 bt_dev_err(hdev, "Invalid codec id(%u)", codec->id); 997 goto error; 998 } 999 /* codec and its capabilities are pre-defined to ids 1000 * preset id = 0x00 represents CVSD codec with sampling rate 8K 1001 * preset id = 0x01 represents mSBC codec with sampling rate 16K 1002 */ 1003 *ven_len = sizeof(__u8); 1004 return err; 1005 1006 error: 1007 kfree(*ven_data); 1008 *ven_data = NULL; 1009 return err; 1010 } 1011 1012 static int btmtksdio_sco_setting(struct hci_dev *hdev) 1013 { 1014 const struct btmtk_sco sco_setting = { 1015 .clock_config = 0x49, 1016 .channel_format_config = 0x80, 1017 }; 1018 struct sk_buff *skb; 1019 u32 val; 1020 int err; 1021 1022 /* Enable SCO over I2S/PCM for MediaTek chipset */ 1023 skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting), 1024 &sco_setting, HCI_CMD_TIMEOUT); 1025 if (IS_ERR(skb)) 1026 return PTR_ERR(skb); 1027 1028 kfree_skb(skb); 1029 1030 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val); 1031 if (err < 0) 1032 return err; 1033 1034 val |= 0x11000000; 1035 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0); 1036 if (err < 0) 1037 return err; 1038 1039 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val); 1040 if (err < 0) 1041 return err; 1042 1043 val |= 0x00000101; 1044 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); 1045 if (err < 0) 1046 return err; 1047 1048 hdev->get_data_path_id = btmtksdio_get_data_path_id; 1049 hdev->get_codec_config_data = btmtksdio_get_codec_config_data; 1050 1051 return err; 1052 } 1053 1054 static int btmtksdio_reset_setting(struct hci_dev *hdev) 1055 { 1056 int err; 1057 u32 val; 1058 1059 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val); 1060 if (err < 0) 1061 return err; 1062 1063 val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */ 1064 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0); 1065 if (err < 0) 1066 return err; 1067 1068 err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val); 1069 if (err < 0) 1070 return err; 1071 1072 val |= MT7921_BTSYS_RST_WITH_GPIO; 1073 return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0); 1074 } 1075 1076 static int btmtksdio_setup(struct hci_dev *hdev) 1077 { 1078 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1079 ktime_t calltime, delta, rettime; 1080 unsigned long long duration; 1081 char fwname[64]; 1082 int err, dev_id; 1083 u32 fw_version = 0, val; 1084 1085 calltime = ktime_get(); 1086 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state); 1087 1088 switch (bdev->data->chipid) { 1089 case 0x7921: 1090 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) { 1091 err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS, 1092 &val); 1093 if (err < 0) 1094 return err; 1095 1096 val &= ~BT_DL_STATE; 1097 err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS, 1098 val, ~0); 1099 if (err < 0) 1100 return err; 1101 1102 btmtksdio_fw_pmctrl(bdev); 1103 msleep(20); 1104 btmtksdio_drv_pmctrl(bdev); 1105 1106 clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state); 1107 } 1108 1109 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id); 1110 if (err < 0) { 1111 bt_dev_err(hdev, "Failed to get device id (%d)", err); 1112 return err; 1113 } 1114 1115 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version); 1116 if (err < 0) { 1117 bt_dev_err(hdev, "Failed to get fw version (%d)", err); 1118 return err; 1119 } 1120 1121 btmtk_fw_get_filename(fwname, sizeof(fwname), dev_id, 1122 fw_version, 0); 1123 1124 snprintf(fwname, sizeof(fwname), 1125 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin", 1126 dev_id & 0xffff, (fw_version & 0xff) + 1); 1127 err = mt79xx_setup(hdev, fwname); 1128 if (err < 0) 1129 return err; 1130 1131 /* Enable SCO over I2S/PCM */ 1132 err = btmtksdio_sco_setting(hdev); 1133 if (err < 0) { 1134 bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err); 1135 return err; 1136 } 1137 1138 /* Enable WBS with mSBC codec */ 1139 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks); 1140 1141 /* Enable GPIO reset mechanism */ 1142 if (bdev->reset) { 1143 err = btmtksdio_reset_setting(hdev); 1144 if (err < 0) { 1145 bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err); 1146 devm_gpiod_put(bdev->dev, bdev->reset); 1147 bdev->reset = NULL; 1148 } 1149 } 1150 1151 break; 1152 case 0x7663: 1153 case 0x7668: 1154 err = mt76xx_setup(hdev, bdev->data->fwname); 1155 if (err < 0) 1156 return err; 1157 break; 1158 default: 1159 return -ENODEV; 1160 } 1161 1162 rettime = ktime_get(); 1163 delta = ktime_sub(rettime, calltime); 1164 duration = (unsigned long long)ktime_to_ns(delta) >> 10; 1165 1166 pm_runtime_set_autosuspend_delay(bdev->dev, 1167 MTKBTSDIO_AUTOSUSPEND_DELAY); 1168 pm_runtime_use_autosuspend(bdev->dev); 1169 1170 err = pm_runtime_set_active(bdev->dev); 1171 if (err < 0) 1172 return err; 1173 1174 /* Default forbid runtime auto suspend, that can be allowed by 1175 * enable_autosuspend flag or the PM runtime entry under sysfs. 1176 */ 1177 pm_runtime_forbid(bdev->dev); 1178 pm_runtime_enable(bdev->dev); 1179 1180 if (enable_autosuspend) 1181 pm_runtime_allow(bdev->dev); 1182 1183 bt_dev_info(hdev, "Device setup in %llu usecs", duration); 1184 1185 return 0; 1186 } 1187 1188 static int btmtksdio_shutdown(struct hci_dev *hdev) 1189 { 1190 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1191 struct btmtk_hci_wmt_params wmt_params; 1192 u8 param = 0x0; 1193 int err; 1194 1195 /* Get back the state to be consistent with the state 1196 * in btmtksdio_setup. 1197 */ 1198 pm_runtime_get_sync(bdev->dev); 1199 1200 /* wmt command only works until the reset is complete */ 1201 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) 1202 goto ignore_wmt_cmd; 1203 1204 /* Disable the device */ 1205 wmt_params.op = BTMTK_WMT_FUNC_CTRL; 1206 wmt_params.flag = 0; 1207 wmt_params.dlen = sizeof(param); 1208 wmt_params.data = ¶m; 1209 wmt_params.status = NULL; 1210 1211 err = mtk_hci_wmt_sync(hdev, &wmt_params); 1212 if (err < 0) { 1213 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err); 1214 return err; 1215 } 1216 1217 ignore_wmt_cmd: 1218 pm_runtime_put_noidle(bdev->dev); 1219 pm_runtime_disable(bdev->dev); 1220 1221 return 0; 1222 } 1223 1224 static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb) 1225 { 1226 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1227 1228 switch (hci_skb_pkt_type(skb)) { 1229 case HCI_COMMAND_PKT: 1230 hdev->stat.cmd_tx++; 1231 break; 1232 1233 case HCI_ACLDATA_PKT: 1234 hdev->stat.acl_tx++; 1235 break; 1236 1237 case HCI_SCODATA_PKT: 1238 hdev->stat.sco_tx++; 1239 break; 1240 1241 default: 1242 return -EILSEQ; 1243 } 1244 1245 skb_queue_tail(&bdev->txq, skb); 1246 1247 schedule_work(&bdev->txrx_work); 1248 1249 return 0; 1250 } 1251 1252 static void btmtksdio_cmd_timeout(struct hci_dev *hdev) 1253 { 1254 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1255 u32 status; 1256 int err; 1257 1258 if (!bdev->reset || bdev->data->chipid != 0x7921) 1259 return; 1260 1261 pm_runtime_get_sync(bdev->dev); 1262 1263 if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) 1264 return; 1265 1266 sdio_claim_host(bdev->func); 1267 1268 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); 1269 skb_queue_purge(&bdev->txq); 1270 cancel_work_sync(&bdev->txrx_work); 1271 1272 gpiod_set_value_cansleep(bdev->reset, 1); 1273 msleep(100); 1274 gpiod_set_value_cansleep(bdev->reset, 0); 1275 1276 err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status, 1277 status & BT_RST_DONE, 100000, 2000000); 1278 if (err < 0) { 1279 bt_dev_err(hdev, "Failed to reset (%d)", err); 1280 goto err; 1281 } 1282 1283 clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state); 1284 err: 1285 sdio_release_host(bdev->func); 1286 1287 pm_runtime_put_noidle(bdev->dev); 1288 pm_runtime_disable(bdev->dev); 1289 1290 hci_reset_dev(hdev); 1291 } 1292 1293 static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev) 1294 { 1295 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1296 1297 return device_may_wakeup(bdev->dev); 1298 } 1299 1300 static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev) 1301 { 1302 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); 1303 bool may_wakeup = device_may_wakeup(bdev->dev); 1304 const struct btmtk_wakeon bt_awake = { 1305 .mode = 0x1, 1306 .gpo = 0, 1307 .active_high = 0x1, 1308 .enable_delay = cpu_to_le16(0xc80), 1309 .wakeup_delay = cpu_to_le16(0x20), 1310 }; 1311 1312 if (may_wakeup && bdev->data->chipid == 0x7921) { 1313 struct sk_buff *skb; 1314 1315 skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake), 1316 &bt_awake, HCI_CMD_TIMEOUT); 1317 if (IS_ERR(skb)) 1318 may_wakeup = false; 1319 else 1320 kfree_skb(skb); 1321 } 1322 1323 return may_wakeup; 1324 } 1325 1326 static int btmtksdio_probe(struct sdio_func *func, 1327 const struct sdio_device_id *id) 1328 { 1329 struct btmtksdio_dev *bdev; 1330 struct hci_dev *hdev; 1331 struct device_node *old_node; 1332 bool restore_node; 1333 int err; 1334 1335 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL); 1336 if (!bdev) 1337 return -ENOMEM; 1338 1339 bdev->data = (void *)id->driver_data; 1340 if (!bdev->data) 1341 return -ENODEV; 1342 1343 bdev->dev = &func->dev; 1344 bdev->func = func; 1345 1346 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work); 1347 skb_queue_head_init(&bdev->txq); 1348 1349 /* Initialize and register HCI device */ 1350 hdev = hci_alloc_dev(); 1351 if (!hdev) { 1352 dev_err(&func->dev, "Can't allocate HCI device\n"); 1353 return -ENOMEM; 1354 } 1355 1356 bdev->hdev = hdev; 1357 1358 hdev->bus = HCI_SDIO; 1359 hci_set_drvdata(hdev, bdev); 1360 1361 hdev->open = btmtksdio_open; 1362 hdev->close = btmtksdio_close; 1363 hdev->cmd_timeout = btmtksdio_cmd_timeout; 1364 hdev->flush = btmtksdio_flush; 1365 hdev->setup = btmtksdio_setup; 1366 hdev->shutdown = btmtksdio_shutdown; 1367 hdev->send = btmtksdio_send_frame; 1368 hdev->wakeup = btmtksdio_sdio_wakeup; 1369 /* 1370 * If SDIO controller supports wake on Bluetooth, sending a wakeon 1371 * command is not necessary. 1372 */ 1373 if (device_can_wakeup(func->card->host->parent)) 1374 hdev->wakeup = btmtksdio_sdio_inband_wakeup; 1375 else 1376 hdev->wakeup = btmtksdio_sdio_wakeup; 1377 hdev->set_bdaddr = btmtk_set_bdaddr; 1378 1379 SET_HCIDEV_DEV(hdev, &func->dev); 1380 1381 hdev->manufacturer = 70; 1382 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); 1383 1384 sdio_set_drvdata(func, bdev); 1385 1386 err = hci_register_dev(hdev); 1387 if (err < 0) { 1388 dev_err(&func->dev, "Can't register HCI device\n"); 1389 hci_free_dev(hdev); 1390 return err; 1391 } 1392 1393 /* pm_runtime_enable would be done after the firmware is being 1394 * downloaded because the core layer probably already enables 1395 * runtime PM for this func such as the case host->caps & 1396 * MMC_CAP_POWER_OFF_CARD. 1397 */ 1398 if (pm_runtime_enabled(bdev->dev)) 1399 pm_runtime_disable(bdev->dev); 1400 1401 /* As explanation in drivers/mmc/core/sdio_bus.c tells us: 1402 * Unbound SDIO functions are always suspended. 1403 * During probe, the function is set active and the usage count 1404 * is incremented. If the driver supports runtime PM, 1405 * it should call pm_runtime_put_noidle() in its probe routine and 1406 * pm_runtime_get_noresume() in its remove routine. 1407 * 1408 * So, put a pm_runtime_put_noidle here ! 1409 */ 1410 pm_runtime_put_noidle(bdev->dev); 1411 1412 err = device_init_wakeup(bdev->dev, true); 1413 if (err) 1414 bt_dev_err(hdev, "failed to initialize device wakeup"); 1415 1416 restore_node = false; 1417 if (!of_device_is_compatible(bdev->dev->of_node, "mediatek,mt7921s-bluetooth")) { 1418 restore_node = true; 1419 old_node = bdev->dev->of_node; 1420 bdev->dev->of_node = of_find_compatible_node(NULL, NULL, 1421 "mediatek,mt7921s-bluetooth"); 1422 } 1423 1424 bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset", 1425 GPIOD_OUT_LOW); 1426 if (IS_ERR(bdev->reset)) 1427 err = PTR_ERR(bdev->reset); 1428 1429 if (restore_node) { 1430 of_node_put(bdev->dev->of_node); 1431 bdev->dev->of_node = old_node; 1432 } 1433 1434 return err; 1435 } 1436 1437 static void btmtksdio_remove(struct sdio_func *func) 1438 { 1439 struct btmtksdio_dev *bdev = sdio_get_drvdata(func); 1440 struct hci_dev *hdev; 1441 1442 if (!bdev) 1443 return; 1444 1445 /* Be consistent the state in btmtksdio_probe */ 1446 pm_runtime_get_noresume(bdev->dev); 1447 1448 hdev = bdev->hdev; 1449 1450 sdio_set_drvdata(func, NULL); 1451 hci_unregister_dev(hdev); 1452 hci_free_dev(hdev); 1453 } 1454 1455 #ifdef CONFIG_PM 1456 static int btmtksdio_runtime_suspend(struct device *dev) 1457 { 1458 struct sdio_func *func = dev_to_sdio_func(dev); 1459 struct btmtksdio_dev *bdev; 1460 int err; 1461 1462 bdev = sdio_get_drvdata(func); 1463 if (!bdev) 1464 return 0; 1465 1466 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1467 return 0; 1468 1469 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 1470 1471 err = btmtksdio_fw_pmctrl(bdev); 1472 1473 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err); 1474 1475 return err; 1476 } 1477 1478 static int btmtksdio_system_suspend(struct device *dev) 1479 { 1480 struct sdio_func *func = dev_to_sdio_func(dev); 1481 struct btmtksdio_dev *bdev; 1482 1483 bdev = sdio_get_drvdata(func); 1484 if (!bdev) 1485 return 0; 1486 1487 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1488 return 0; 1489 1490 set_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state); 1491 1492 return btmtksdio_runtime_suspend(dev); 1493 } 1494 1495 static int btmtksdio_runtime_resume(struct device *dev) 1496 { 1497 struct sdio_func *func = dev_to_sdio_func(dev); 1498 struct btmtksdio_dev *bdev; 1499 int err; 1500 1501 bdev = sdio_get_drvdata(func); 1502 if (!bdev) 1503 return 0; 1504 1505 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state)) 1506 return 0; 1507 1508 err = btmtksdio_drv_pmctrl(bdev); 1509 1510 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err); 1511 1512 return err; 1513 } 1514 1515 static int btmtksdio_system_resume(struct device *dev) 1516 { 1517 return btmtksdio_runtime_resume(dev); 1518 } 1519 1520 static const struct dev_pm_ops btmtksdio_pm_ops = { 1521 SYSTEM_SLEEP_PM_OPS(btmtksdio_system_suspend, btmtksdio_system_resume) 1522 RUNTIME_PM_OPS(btmtksdio_runtime_suspend, btmtksdio_runtime_resume, NULL) 1523 }; 1524 1525 #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops) 1526 #else /* CONFIG_PM */ 1527 #define BTMTKSDIO_PM_OPS NULL 1528 #endif /* CONFIG_PM */ 1529 1530 static struct sdio_driver btmtksdio_driver = { 1531 .name = "btmtksdio", 1532 .probe = btmtksdio_probe, 1533 .remove = btmtksdio_remove, 1534 .id_table = btmtksdio_table, 1535 .drv = { 1536 .pm = BTMTKSDIO_PM_OPS, 1537 } 1538 }; 1539 1540 module_sdio_driver(btmtksdio_driver); 1541 1542 module_param(enable_autosuspend, bool, 0644); 1543 MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default"); 1544 1545 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); 1546 MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION); 1547 MODULE_VERSION(VERSION); 1548 MODULE_LICENSE("GPL"); 1549