1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Bluetooth Software UART Qualcomm protocol 4 * 5 * HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management 6 * protocol extension to H4. 7 * 8 * Copyright (C) 2007 Texas Instruments, Inc. 9 * Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved. 10 * 11 * Acknowledgements: 12 * This file is based on hci_ll.c, which was... 13 * Written by Ohad Ben-Cohen <ohad@bencohen.org> 14 * which was in turn based on hci_h4.c, which was written 15 * by Maxim Krasnyansky and Marcel Holtmann. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/clk.h> 20 #include <linux/completion.h> 21 #include <linux/debugfs.h> 22 #include <linux/delay.h> 23 #include <linux/devcoredump.h> 24 #include <linux/device.h> 25 #include <linux/gpio/consumer.h> 26 #include <linux/module.h> 27 #include <linux/of.h> 28 #include <linux/acpi.h> 29 #include <linux/platform_device.h> 30 #include <linux/pwrseq/consumer.h> 31 #include <linux/regulator/consumer.h> 32 #include <linux/serdev.h> 33 #include <linux/string_choices.h> 34 #include <linux/mutex.h> 35 #include <linux/unaligned.h> 36 37 #include <net/bluetooth/bluetooth.h> 38 #include <net/bluetooth/hci_core.h> 39 40 #include "hci_uart.h" 41 #include "btqca.h" 42 43 /* HCI_IBS protocol messages */ 44 #define HCI_IBS_SLEEP_IND 0xFE 45 #define HCI_IBS_WAKE_IND 0xFD 46 #define HCI_IBS_WAKE_ACK 0xFC 47 #define HCI_MAX_IBS_SIZE 10 48 49 #define IBS_WAKE_RETRANS_TIMEOUT_MS 100 50 #define IBS_BTSOC_TX_IDLE_TIMEOUT msecs_to_jiffies(200) 51 #define IBS_HOST_TX_IDLE_TIMEOUT_MS 2000 52 #define CMD_TRANS_TIMEOUT msecs_to_jiffies(100) 53 #define MEMDUMP_TIMEOUT msecs_to_jiffies(8000) 54 #define FW_DOWNLOAD_TIMEOUT msecs_to_jiffies(3000) 55 #define IBS_DISABLE_SSR_TIMEOUT (MEMDUMP_TIMEOUT + FW_DOWNLOAD_TIMEOUT) 56 57 /* susclk rate */ 58 #define SUSCLK_RATE_32KHZ 32768 59 60 /* Controller debug log header */ 61 #define QCA_DEBUG_HANDLE 0x2EDC 62 63 /* max retry count when init fails */ 64 #define MAX_INIT_RETRIES 3 65 66 /* Controller dump header */ 67 #define QCA_SSR_DUMP_HANDLE 0x0108 68 #define QCA_DUMP_PACKET_SIZE 255 69 #define QCA_LAST_SEQUENCE_NUM 0xFFFF 70 #define QCA_CRASHBYTE_PACKET_LEN 1096 71 #define QCA_MEMDUMP_BYTE 0xFB 72 73 enum qca_flags { 74 QCA_IBS_DISABLED, 75 QCA_DROP_VENDOR_EVENT, 76 QCA_SUSPENDING, 77 QCA_MEMDUMP_COLLECTION, 78 QCA_HW_ERROR_EVENT, 79 QCA_SSR_TRIGGERED, 80 QCA_BT_OFF, 81 QCA_ROM_FW, 82 QCA_DEBUGFS_CREATED, 83 }; 84 85 enum qca_capabilities { 86 QCA_CAP_WIDEBAND_SPEECH = BIT(0), 87 QCA_CAP_VALID_LE_STATES = BIT(1), 88 QCA_CAP_HFP_HW_OFFLOAD = BIT(2), 89 }; 90 91 /* HCI_IBS transmit side sleep protocol states */ 92 enum tx_ibs_states { 93 HCI_IBS_TX_ASLEEP, 94 HCI_IBS_TX_WAKING, 95 HCI_IBS_TX_AWAKE, 96 }; 97 98 /* HCI_IBS receive side sleep protocol states */ 99 enum rx_states { 100 HCI_IBS_RX_ASLEEP, 101 HCI_IBS_RX_AWAKE, 102 }; 103 104 /* HCI_IBS transmit and receive side clock state vote */ 105 enum hci_ibs_clock_state_vote { 106 HCI_IBS_VOTE_STATS_UPDATE, 107 HCI_IBS_TX_VOTE_CLOCK_ON, 108 HCI_IBS_TX_VOTE_CLOCK_OFF, 109 HCI_IBS_RX_VOTE_CLOCK_ON, 110 HCI_IBS_RX_VOTE_CLOCK_OFF, 111 }; 112 113 /* Controller memory dump states */ 114 enum qca_memdump_states { 115 QCA_MEMDUMP_IDLE, 116 QCA_MEMDUMP_COLLECTING, 117 QCA_MEMDUMP_COLLECTED, 118 QCA_MEMDUMP_TIMEOUT, 119 }; 120 121 struct qca_memdump_info { 122 u32 current_seq_no; 123 u32 received_dump; 124 u32 ram_dump_size; 125 }; 126 127 struct qca_memdump_event_hdr { 128 __u8 evt; 129 __u8 plen; 130 __u16 opcode; 131 __le16 seq_no; 132 __u8 reserved; 133 } __packed; 134 135 136 struct qca_dump_size { 137 __le32 dump_size; 138 } __packed; 139 140 struct qca_data { 141 struct hci_uart *hu; 142 struct sk_buff *rx_skb; 143 struct sk_buff_head txq; 144 struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */ 145 struct sk_buff_head rx_memdump_q; /* Memdump wait queue */ 146 spinlock_t hci_ibs_lock; /* HCI_IBS state lock */ 147 u8 tx_ibs_state; /* HCI_IBS transmit side power state*/ 148 u8 rx_ibs_state; /* HCI_IBS receive side power state */ 149 bool tx_vote; /* Clock must be on for TX */ 150 bool rx_vote; /* Clock must be on for RX */ 151 struct timer_list tx_idle_timer; 152 u32 tx_idle_delay; 153 struct timer_list wake_retrans_timer; 154 u32 wake_retrans; 155 struct workqueue_struct *workqueue; 156 struct work_struct ws_awake_rx; 157 struct work_struct ws_awake_device; 158 struct work_struct ws_rx_vote_off; 159 struct work_struct ws_tx_vote_off; 160 struct work_struct ctrl_memdump_evt; 161 struct delayed_work ctrl_memdump_timeout; 162 struct qca_memdump_info *qca_memdump; 163 unsigned long flags; 164 struct completion drop_ev_comp; 165 wait_queue_head_t suspend_wait_q; 166 enum qca_memdump_states memdump_state; 167 struct mutex hci_memdump_lock; 168 169 u16 fw_version; 170 u16 controller_id; 171 /* For debugging purpose */ 172 u64 ibs_sent_wacks; 173 u64 ibs_sent_slps; 174 u64 ibs_sent_wakes; 175 u64 ibs_recv_wacks; 176 u64 ibs_recv_slps; 177 u64 ibs_recv_wakes; 178 u64 vote_last_jif; 179 u32 vote_on_ms; 180 u32 vote_off_ms; 181 u64 tx_votes_on; 182 u64 rx_votes_on; 183 u64 tx_votes_off; 184 u64 rx_votes_off; 185 u64 votes_on; 186 u64 votes_off; 187 }; 188 189 enum qca_speed_type { 190 QCA_INIT_SPEED = 1, 191 QCA_OPER_SPEED 192 }; 193 194 /* 195 * Voltage regulator information required for configuring the 196 * QCA Bluetooth chipset 197 */ 198 struct qca_vreg { 199 const char *name; 200 unsigned int load_uA; 201 }; 202 203 struct qca_device_data { 204 enum qca_btsoc_type soc_type; 205 struct qca_vreg *vregs; 206 size_t num_vregs; 207 uint32_t capabilities; 208 }; 209 210 /* 211 * Platform data for the QCA Bluetooth power driver. 212 */ 213 struct qca_power { 214 struct device *dev; 215 struct regulator_bulk_data *vreg_bulk; 216 int num_vregs; 217 bool vregs_on; 218 struct pwrseq_desc *pwrseq; 219 }; 220 221 struct qca_serdev { 222 struct hci_uart serdev_hu; 223 struct gpio_desc *bt_en; 224 struct gpio_desc *sw_ctrl; 225 struct clk *susclk; 226 enum qca_btsoc_type btsoc_type; 227 struct qca_power *bt_power; 228 u32 init_speed; 229 u32 oper_speed; 230 bool bdaddr_property_broken; 231 bool support_hfp_hw_offload; 232 const char *firmware_name[2]; 233 }; 234 235 static int qca_regulator_enable(struct qca_serdev *qcadev); 236 static void qca_regulator_disable(struct qca_serdev *qcadev); 237 static void qca_power_off(struct hci_uart *hu); 238 static void qca_controller_memdump(struct work_struct *work); 239 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb); 240 241 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu) 242 { 243 enum qca_btsoc_type soc_type; 244 245 if (hu->serdev) { 246 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 247 248 soc_type = qsd->btsoc_type; 249 } else { 250 soc_type = QCA_ROME; 251 } 252 253 return soc_type; 254 } 255 256 static const char *qca_get_firmware_name(struct hci_uart *hu) 257 { 258 if (hu->serdev) { 259 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 260 261 return qsd->firmware_name[0]; 262 } else { 263 return NULL; 264 } 265 } 266 267 static const char *qca_get_rampatch_name(struct hci_uart *hu) 268 { 269 if (hu->serdev) { 270 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 271 272 return qsd->firmware_name[1]; 273 } else { 274 return NULL; 275 } 276 } 277 278 static void __serial_clock_on(struct tty_struct *tty) 279 { 280 /* TODO: Some chipset requires to enable UART clock on client 281 * side to save power consumption or manual work is required. 282 * Please put your code to control UART clock here if needed 283 */ 284 } 285 286 static void __serial_clock_off(struct tty_struct *tty) 287 { 288 /* TODO: Some chipset requires to disable UART clock on client 289 * side to save power consumption or manual work is required. 290 * Please put your code to control UART clock off here if needed 291 */ 292 } 293 294 /* serial_clock_vote needs to be called with the ibs lock held */ 295 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu) 296 { 297 struct qca_data *qca = hu->priv; 298 unsigned int diff; 299 300 bool old_vote = (qca->tx_vote | qca->rx_vote); 301 bool new_vote; 302 303 switch (vote) { 304 case HCI_IBS_VOTE_STATS_UPDATE: 305 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 306 307 if (old_vote) 308 qca->vote_off_ms += diff; 309 else 310 qca->vote_on_ms += diff; 311 return; 312 313 case HCI_IBS_TX_VOTE_CLOCK_ON: 314 qca->tx_vote = true; 315 qca->tx_votes_on++; 316 break; 317 318 case HCI_IBS_RX_VOTE_CLOCK_ON: 319 qca->rx_vote = true; 320 qca->rx_votes_on++; 321 break; 322 323 case HCI_IBS_TX_VOTE_CLOCK_OFF: 324 qca->tx_vote = false; 325 qca->tx_votes_off++; 326 break; 327 328 case HCI_IBS_RX_VOTE_CLOCK_OFF: 329 qca->rx_vote = false; 330 qca->rx_votes_off++; 331 break; 332 333 default: 334 BT_ERR("Voting irregularity"); 335 return; 336 } 337 338 new_vote = qca->rx_vote | qca->tx_vote; 339 340 if (new_vote != old_vote) { 341 if (new_vote) 342 __serial_clock_on(hu->tty); 343 else 344 __serial_clock_off(hu->tty); 345 346 BT_DBG("Vote serial clock %s(%s)", str_true_false(new_vote), 347 str_true_false(vote)); 348 349 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 350 351 if (new_vote) { 352 qca->votes_on++; 353 qca->vote_off_ms += diff; 354 } else { 355 qca->votes_off++; 356 qca->vote_on_ms += diff; 357 } 358 qca->vote_last_jif = jiffies; 359 } 360 } 361 362 /* Builds and sends an HCI_IBS command packet. 363 * These are very simple packets with only 1 cmd byte. 364 */ 365 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu) 366 { 367 int err = 0; 368 struct sk_buff *skb = NULL; 369 struct qca_data *qca = hu->priv; 370 371 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd); 372 373 skb = bt_skb_alloc(1, GFP_ATOMIC); 374 if (!skb) { 375 BT_ERR("Failed to allocate memory for HCI_IBS packet"); 376 return -ENOMEM; 377 } 378 379 /* Assign HCI_IBS type */ 380 skb_put_u8(skb, cmd); 381 382 skb_queue_tail(&qca->txq, skb); 383 384 return err; 385 } 386 387 static void qca_wq_awake_device(struct work_struct *work) 388 { 389 struct qca_data *qca = container_of(work, struct qca_data, 390 ws_awake_device); 391 struct hci_uart *hu = qca->hu; 392 unsigned long retrans_delay; 393 unsigned long flags; 394 395 BT_DBG("hu %p wq awake device", hu); 396 397 /* Vote for serial clock */ 398 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu); 399 400 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 401 402 /* Send wake indication to device */ 403 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) 404 BT_ERR("Failed to send WAKE to device"); 405 406 qca->ibs_sent_wakes++; 407 408 /* Start retransmit timer */ 409 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 410 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 411 412 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 413 414 /* Actually send the packets */ 415 hci_uart_tx_wakeup(hu); 416 } 417 418 static void qca_wq_awake_rx(struct work_struct *work) 419 { 420 struct qca_data *qca = container_of(work, struct qca_data, 421 ws_awake_rx); 422 struct hci_uart *hu = qca->hu; 423 unsigned long flags; 424 425 BT_DBG("hu %p wq awake rx", hu); 426 427 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu); 428 429 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 430 qca->rx_ibs_state = HCI_IBS_RX_AWAKE; 431 432 /* Always acknowledge device wake up, 433 * sending IBS message doesn't count as TX ON. 434 */ 435 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) 436 BT_ERR("Failed to acknowledge device wake up"); 437 438 qca->ibs_sent_wacks++; 439 440 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 441 442 /* Actually send the packets */ 443 hci_uart_tx_wakeup(hu); 444 } 445 446 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work) 447 { 448 struct qca_data *qca = container_of(work, struct qca_data, 449 ws_rx_vote_off); 450 struct hci_uart *hu = qca->hu; 451 452 BT_DBG("hu %p rx clock vote off", hu); 453 454 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu); 455 } 456 457 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work) 458 { 459 struct qca_data *qca = container_of(work, struct qca_data, 460 ws_tx_vote_off); 461 struct hci_uart *hu = qca->hu; 462 463 BT_DBG("hu %p tx clock vote off", hu); 464 465 /* Run HCI tx handling unlocked */ 466 hci_uart_tx_wakeup(hu); 467 468 /* Now that message queued to tty driver, vote for tty clocks off. 469 * It is up to the tty driver to pend the clocks off until tx done. 470 */ 471 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 472 } 473 474 static void hci_ibs_tx_idle_timeout(struct timer_list *t) 475 { 476 struct qca_data *qca = timer_container_of(qca, t, tx_idle_timer); 477 struct hci_uart *hu = qca->hu; 478 unsigned long flags; 479 480 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state); 481 482 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 483 flags, SINGLE_DEPTH_NESTING); 484 485 switch (qca->tx_ibs_state) { 486 case HCI_IBS_TX_AWAKE: 487 /* TX_IDLE, go to SLEEP */ 488 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) { 489 BT_ERR("Failed to send SLEEP to device"); 490 break; 491 } 492 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 493 qca->ibs_sent_slps++; 494 queue_work(qca->workqueue, &qca->ws_tx_vote_off); 495 break; 496 497 case HCI_IBS_TX_ASLEEP: 498 case HCI_IBS_TX_WAKING: 499 default: 500 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 501 break; 502 } 503 504 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 505 } 506 507 static void hci_ibs_wake_retrans_timeout(struct timer_list *t) 508 { 509 struct qca_data *qca = timer_container_of(qca, t, wake_retrans_timer); 510 struct hci_uart *hu = qca->hu; 511 unsigned long flags, retrans_delay; 512 bool retransmit = false; 513 514 BT_DBG("hu %p wake retransmit timeout in %d state", 515 hu, qca->tx_ibs_state); 516 517 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 518 flags, SINGLE_DEPTH_NESTING); 519 520 /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */ 521 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 522 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 523 return; 524 } 525 526 switch (qca->tx_ibs_state) { 527 case HCI_IBS_TX_WAKING: 528 /* No WAKE_ACK, retransmit WAKE */ 529 retransmit = true; 530 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) { 531 BT_ERR("Failed to acknowledge device wake up"); 532 break; 533 } 534 qca->ibs_sent_wakes++; 535 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 536 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 537 break; 538 539 case HCI_IBS_TX_ASLEEP: 540 case HCI_IBS_TX_AWAKE: 541 default: 542 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 543 break; 544 } 545 546 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 547 548 if (retransmit) 549 hci_uart_tx_wakeup(hu); 550 } 551 552 553 static void qca_controller_memdump_timeout(struct work_struct *work) 554 { 555 struct qca_data *qca = container_of(work, struct qca_data, 556 ctrl_memdump_timeout.work); 557 struct hci_uart *hu = qca->hu; 558 559 mutex_lock(&qca->hci_memdump_lock); 560 if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) { 561 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 562 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 563 /* Inject hw error event to reset the device 564 * and driver. 565 */ 566 hci_reset_dev(hu->hdev); 567 } 568 } 569 570 mutex_unlock(&qca->hci_memdump_lock); 571 } 572 573 574 /* Initialize protocol */ 575 static int qca_open(struct hci_uart *hu) 576 { 577 struct qca_serdev *qcadev; 578 struct qca_data *qca; 579 580 BT_DBG("hu %p qca_open", hu); 581 582 if (!hci_uart_has_flow_control(hu)) 583 return -EOPNOTSUPP; 584 585 qca = kzalloc_obj(*qca); 586 if (!qca) 587 return -ENOMEM; 588 589 skb_queue_head_init(&qca->txq); 590 skb_queue_head_init(&qca->tx_wait_q); 591 skb_queue_head_init(&qca->rx_memdump_q); 592 spin_lock_init(&qca->hci_ibs_lock); 593 mutex_init(&qca->hci_memdump_lock); 594 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0); 595 if (!qca->workqueue) { 596 BT_ERR("QCA Workqueue not initialized properly"); 597 kfree(qca); 598 return -ENOMEM; 599 } 600 601 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx); 602 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device); 603 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off); 604 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off); 605 INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump); 606 INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout, 607 qca_controller_memdump_timeout); 608 init_waitqueue_head(&qca->suspend_wait_q); 609 610 qca->hu = hu; 611 init_completion(&qca->drop_ev_comp); 612 613 /* Assume we start with both sides asleep -- extra wakes OK */ 614 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 615 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 616 617 qca->vote_last_jif = jiffies; 618 619 hu->priv = qca; 620 621 if (hu->serdev) { 622 qcadev = serdev_device_get_drvdata(hu->serdev); 623 624 switch (qcadev->btsoc_type) { 625 case QCA_WCN3950: 626 case QCA_WCN3988: 627 case QCA_WCN3990: 628 case QCA_WCN3991: 629 case QCA_WCN3998: 630 case QCA_WCN6750: 631 hu->init_speed = qcadev->init_speed; 632 break; 633 634 default: 635 break; 636 } 637 638 if (qcadev->oper_speed) 639 hu->oper_speed = qcadev->oper_speed; 640 } 641 642 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0); 643 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS; 644 645 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0); 646 qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS; 647 648 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u", 649 qca->tx_idle_delay, qca->wake_retrans); 650 651 return 0; 652 } 653 654 static void qca_debugfs_init(struct hci_dev *hdev) 655 { 656 struct hci_uart *hu = hci_get_drvdata(hdev); 657 struct qca_data *qca = hu->priv; 658 struct dentry *ibs_dir; 659 umode_t mode; 660 661 if (!hdev->debugfs) 662 return; 663 664 if (test_and_set_bit(QCA_DEBUGFS_CREATED, &qca->flags)) 665 return; 666 667 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs); 668 669 /* read only */ 670 mode = 0444; 671 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state); 672 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state); 673 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir, 674 &qca->ibs_sent_slps); 675 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir, 676 &qca->ibs_sent_wakes); 677 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir, 678 &qca->ibs_sent_wacks); 679 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir, 680 &qca->ibs_recv_slps); 681 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir, 682 &qca->ibs_recv_wakes); 683 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir, 684 &qca->ibs_recv_wacks); 685 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote); 686 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on); 687 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off); 688 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote); 689 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on); 690 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off); 691 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on); 692 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off); 693 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms); 694 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms); 695 696 /* read/write */ 697 mode = 0644; 698 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans); 699 debugfs_create_u32("tx_idle_delay", mode, ibs_dir, 700 &qca->tx_idle_delay); 701 } 702 703 /* Flush protocol data */ 704 static int qca_flush(struct hci_uart *hu) 705 { 706 struct qca_data *qca = hu->priv; 707 708 BT_DBG("hu %p qca flush", hu); 709 710 skb_queue_purge(&qca->tx_wait_q); 711 skb_queue_purge(&qca->txq); 712 713 return 0; 714 } 715 716 /* Close protocol */ 717 static int qca_close(struct hci_uart *hu) 718 { 719 struct qca_data *qca = hu->priv; 720 721 BT_DBG("hu %p qca close", hu); 722 723 /* BT core skips qca_hci_shutdown() which calls qca_power_off() on rmmod */ 724 if (!test_bit(QCA_BT_OFF, &qca->flags)) 725 qca_power_off(hu); 726 727 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu); 728 729 skb_queue_purge(&qca->tx_wait_q); 730 skb_queue_purge(&qca->txq); 731 skb_queue_purge(&qca->rx_memdump_q); 732 /* 733 * Shut the timers down so they can't be rearmed when 734 * destroy_workqueue() drains pending work which in turn might try 735 * to arm a timer. After shutdown rearm attempts are silently 736 * ignored by the timer core code. 737 */ 738 timer_shutdown_sync(&qca->tx_idle_timer); 739 timer_shutdown_sync(&qca->wake_retrans_timer); 740 destroy_workqueue(qca->workqueue); 741 qca->hu = NULL; 742 743 kfree_skb(qca->rx_skb); 744 745 hu->priv = NULL; 746 747 kfree(qca); 748 749 return 0; 750 } 751 752 /* Called upon a wake-up-indication from the device. 753 */ 754 static void device_want_to_wakeup(struct hci_uart *hu) 755 { 756 unsigned long flags; 757 struct qca_data *qca = hu->priv; 758 759 BT_DBG("hu %p want to wake up", hu); 760 761 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 762 763 qca->ibs_recv_wakes++; 764 765 /* Don't wake the rx up when suspending. */ 766 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 767 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 768 return; 769 } 770 771 switch (qca->rx_ibs_state) { 772 case HCI_IBS_RX_ASLEEP: 773 /* Make sure clock is on - we may have turned clock off since 774 * receiving the wake up indicator awake rx clock. 775 */ 776 queue_work(qca->workqueue, &qca->ws_awake_rx); 777 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 778 return; 779 780 case HCI_IBS_RX_AWAKE: 781 /* Always acknowledge device wake up, 782 * sending IBS message doesn't count as TX ON. 783 */ 784 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) { 785 BT_ERR("Failed to acknowledge device wake up"); 786 break; 787 } 788 qca->ibs_sent_wacks++; 789 break; 790 791 default: 792 /* Any other state is illegal */ 793 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d", 794 qca->rx_ibs_state); 795 break; 796 } 797 798 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 799 800 /* Actually send the packets */ 801 hci_uart_tx_wakeup(hu); 802 } 803 804 /* Called upon a sleep-indication from the device. 805 */ 806 static void device_want_to_sleep(struct hci_uart *hu) 807 { 808 unsigned long flags; 809 struct qca_data *qca = hu->priv; 810 811 BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state); 812 813 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 814 815 qca->ibs_recv_slps++; 816 817 switch (qca->rx_ibs_state) { 818 case HCI_IBS_RX_AWAKE: 819 /* Update state */ 820 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 821 /* Vote off rx clock under workqueue */ 822 queue_work(qca->workqueue, &qca->ws_rx_vote_off); 823 break; 824 825 case HCI_IBS_RX_ASLEEP: 826 break; 827 828 default: 829 /* Any other state is illegal */ 830 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d", 831 qca->rx_ibs_state); 832 break; 833 } 834 835 wake_up_interruptible(&qca->suspend_wait_q); 836 837 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 838 } 839 840 /* Called upon wake-up-acknowledgement from the device 841 */ 842 static void device_woke_up(struct hci_uart *hu) 843 { 844 unsigned long flags, idle_delay; 845 struct qca_data *qca = hu->priv; 846 struct sk_buff *skb = NULL; 847 848 BT_DBG("hu %p woke up", hu); 849 850 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 851 852 qca->ibs_recv_wacks++; 853 854 /* Don't react to the wake-up-acknowledgment when suspending. */ 855 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 856 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 857 return; 858 } 859 860 switch (qca->tx_ibs_state) { 861 case HCI_IBS_TX_AWAKE: 862 /* Expect one if we send 2 WAKEs */ 863 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d", 864 qca->tx_ibs_state); 865 break; 866 867 case HCI_IBS_TX_WAKING: 868 /* Send pending packets */ 869 while ((skb = skb_dequeue(&qca->tx_wait_q))) 870 skb_queue_tail(&qca->txq, skb); 871 872 /* Switch timers and change state to HCI_IBS_TX_AWAKE */ 873 timer_delete(&qca->wake_retrans_timer); 874 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 875 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 876 qca->tx_ibs_state = HCI_IBS_TX_AWAKE; 877 break; 878 879 case HCI_IBS_TX_ASLEEP: 880 default: 881 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d", 882 qca->tx_ibs_state); 883 break; 884 } 885 886 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 887 888 /* Actually send the packets */ 889 hci_uart_tx_wakeup(hu); 890 } 891 892 /* Enqueue frame for transmission (padding, crc, etc) may be called from 893 * two simultaneous tasklets. 894 */ 895 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb) 896 { 897 unsigned long flags = 0, idle_delay; 898 struct qca_data *qca = hu->priv; 899 900 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb, 901 qca->tx_ibs_state); 902 903 if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 904 /* As SSR is in progress, ignore the packets */ 905 bt_dev_dbg(hu->hdev, "SSR is in progress"); 906 kfree_skb(skb); 907 return 0; 908 } 909 910 /* Prepend skb with frame type */ 911 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 912 913 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 914 915 /* Don't go to sleep in middle of patch download or 916 * Out-Of-Band(GPIOs control) sleep is selected. 917 * Don't wake the device up when suspending. 918 */ 919 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 920 test_bit(QCA_SUSPENDING, &qca->flags)) { 921 skb_queue_tail(&qca->txq, skb); 922 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 923 return 0; 924 } 925 926 /* Act according to current state */ 927 switch (qca->tx_ibs_state) { 928 case HCI_IBS_TX_AWAKE: 929 BT_DBG("Device awake, sending normally"); 930 skb_queue_tail(&qca->txq, skb); 931 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 932 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 933 break; 934 935 case HCI_IBS_TX_ASLEEP: 936 BT_DBG("Device asleep, waking up and queueing packet"); 937 /* Save packet for later */ 938 skb_queue_tail(&qca->tx_wait_q, skb); 939 940 qca->tx_ibs_state = HCI_IBS_TX_WAKING; 941 /* Schedule a work queue to wake up device */ 942 queue_work(qca->workqueue, &qca->ws_awake_device); 943 break; 944 945 case HCI_IBS_TX_WAKING: 946 BT_DBG("Device waking up, queueing packet"); 947 /* Transient state; just keep packet for later */ 948 skb_queue_tail(&qca->tx_wait_q, skb); 949 break; 950 951 default: 952 BT_ERR("Illegal tx state: %d (losing packet)", 953 qca->tx_ibs_state); 954 dev_kfree_skb_irq(skb); 955 break; 956 } 957 958 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 959 960 return 0; 961 } 962 963 static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb) 964 { 965 struct hci_uart *hu = hci_get_drvdata(hdev); 966 967 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND); 968 969 device_want_to_sleep(hu); 970 971 kfree_skb(skb); 972 return 0; 973 } 974 975 static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb) 976 { 977 struct hci_uart *hu = hci_get_drvdata(hdev); 978 979 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND); 980 981 device_want_to_wakeup(hu); 982 983 kfree_skb(skb); 984 return 0; 985 } 986 987 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb) 988 { 989 struct hci_uart *hu = hci_get_drvdata(hdev); 990 991 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK); 992 993 device_woke_up(hu); 994 995 kfree_skb(skb); 996 return 0; 997 } 998 999 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb) 1000 { 1001 /* We receive debug logs from chip as an ACL packets. 1002 * Instead of sending the data to ACL to decode the 1003 * received data, we are pushing them to the above layers 1004 * as a diagnostic packet. 1005 */ 1006 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE) 1007 return hci_recv_diag(hdev, skb); 1008 1009 return hci_recv_frame(hdev, skb); 1010 } 1011 1012 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb) 1013 { 1014 struct hci_uart *hu = hci_get_drvdata(hdev); 1015 struct qca_data *qca = hu->priv; 1016 char buf[80]; 1017 1018 snprintf(buf, sizeof(buf), "Controller Name: 0x%x\n", 1019 qca->controller_id); 1020 skb_put_data(skb, buf, strlen(buf)); 1021 1022 snprintf(buf, sizeof(buf), "Firmware Version: 0x%x\n", 1023 qca->fw_version); 1024 skb_put_data(skb, buf, strlen(buf)); 1025 1026 snprintf(buf, sizeof(buf), "Vendor:Qualcomm\n"); 1027 skb_put_data(skb, buf, strlen(buf)); 1028 1029 snprintf(buf, sizeof(buf), "Driver: %s\n", 1030 hu->serdev ? hu->serdev->dev.driver->name : "hci_ldisc_qca"); 1031 skb_put_data(skb, buf, strlen(buf)); 1032 } 1033 1034 static void qca_controller_memdump(struct work_struct *work) 1035 { 1036 struct qca_data *qca = container_of(work, struct qca_data, 1037 ctrl_memdump_evt); 1038 struct hci_uart *hu = qca->hu; 1039 struct sk_buff *skb; 1040 struct qca_memdump_event_hdr *cmd_hdr; 1041 struct qca_memdump_info *qca_memdump = qca->qca_memdump; 1042 struct qca_dump_size *dump; 1043 u16 seq_no; 1044 u32 rx_size; 1045 int ret = 0; 1046 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1047 1048 while ((skb = skb_dequeue(&qca->rx_memdump_q))) { 1049 1050 mutex_lock(&qca->hci_memdump_lock); 1051 /* Skip processing the received packets if timeout detected 1052 * or memdump collection completed. 1053 */ 1054 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 1055 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 1056 mutex_unlock(&qca->hci_memdump_lock); 1057 return; 1058 } 1059 1060 if (!qca_memdump) { 1061 qca_memdump = kzalloc_obj(*qca_memdump, GFP_ATOMIC); 1062 if (!qca_memdump) { 1063 mutex_unlock(&qca->hci_memdump_lock); 1064 return; 1065 } 1066 1067 qca->qca_memdump = qca_memdump; 1068 } 1069 1070 qca->memdump_state = QCA_MEMDUMP_COLLECTING; 1071 cmd_hdr = (void *) skb->data; 1072 seq_no = __le16_to_cpu(cmd_hdr->seq_no); 1073 skb_pull(skb, sizeof(struct qca_memdump_event_hdr)); 1074 1075 if (!seq_no) { 1076 1077 /* This is the first frame of memdump packet from 1078 * the controller, Disable IBS to receive dump 1079 * with out any interruption, ideally time required for 1080 * the controller to send the dump is 8 seconds. let us 1081 * start timer to handle this asynchronous activity. 1082 */ 1083 set_bit(QCA_IBS_DISABLED, &qca->flags); 1084 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1085 dump = (void *) skb->data; 1086 qca_memdump->ram_dump_size = __le32_to_cpu(dump->dump_size); 1087 if (!(qca_memdump->ram_dump_size)) { 1088 bt_dev_err(hu->hdev, "Rx invalid memdump size"); 1089 kfree(qca_memdump); 1090 kfree_skb(skb); 1091 mutex_unlock(&qca->hci_memdump_lock); 1092 return; 1093 } 1094 1095 queue_delayed_work(qca->workqueue, 1096 &qca->ctrl_memdump_timeout, 1097 MEMDUMP_TIMEOUT); 1098 skb_pull(skb, sizeof(qca_memdump->ram_dump_size)); 1099 qca_memdump->current_seq_no = 0; 1100 qca_memdump->received_dump = 0; 1101 ret = hci_devcd_init(hu->hdev, qca_memdump->ram_dump_size); 1102 bt_dev_info(hu->hdev, "hci_devcd_init Return:%d", 1103 ret); 1104 if (ret < 0) { 1105 kfree(qca->qca_memdump); 1106 qca->qca_memdump = NULL; 1107 qca->memdump_state = QCA_MEMDUMP_COLLECTED; 1108 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1109 clear_and_wake_up_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1110 clear_bit(QCA_IBS_DISABLED, &qca->flags); 1111 mutex_unlock(&qca->hci_memdump_lock); 1112 return; 1113 } 1114 1115 bt_dev_info(hu->hdev, "QCA collecting dump of size:%u", 1116 qca_memdump->ram_dump_size); 1117 1118 } 1119 1120 /* If sequence no 0 is missed then there is no point in 1121 * accepting the other sequences. 1122 */ 1123 if (!test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) { 1124 bt_dev_err(hu->hdev, "QCA: Discarding other packets"); 1125 kfree(qca_memdump); 1126 kfree_skb(skb); 1127 mutex_unlock(&qca->hci_memdump_lock); 1128 return; 1129 } 1130 /* There could be chance of missing some packets from 1131 * the controller. In such cases let us store the dummy 1132 * packets in the buffer. 1133 */ 1134 /* For QCA6390, controller does not lost packets but 1135 * sequence number field of packet sometimes has error 1136 * bits, so skip this checking for missing packet. 1137 */ 1138 while ((seq_no > qca_memdump->current_seq_no + 1) && 1139 (soc_type != QCA_QCA6390) && 1140 seq_no != QCA_LAST_SEQUENCE_NUM) { 1141 bt_dev_err(hu->hdev, "QCA controller missed packet:%d", 1142 qca_memdump->current_seq_no); 1143 rx_size = qca_memdump->received_dump; 1144 rx_size += QCA_DUMP_PACKET_SIZE; 1145 if (rx_size > qca_memdump->ram_dump_size) { 1146 bt_dev_err(hu->hdev, 1147 "QCA memdump received %d, no space for missed packet", 1148 qca_memdump->received_dump); 1149 break; 1150 } 1151 hci_devcd_append_pattern(hu->hdev, 0x00, 1152 QCA_DUMP_PACKET_SIZE); 1153 qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE; 1154 qca_memdump->current_seq_no++; 1155 } 1156 1157 rx_size = qca_memdump->received_dump + skb->len; 1158 if (rx_size <= qca_memdump->ram_dump_size) { 1159 if ((seq_no != QCA_LAST_SEQUENCE_NUM) && 1160 (seq_no != qca_memdump->current_seq_no)) { 1161 bt_dev_err(hu->hdev, 1162 "QCA memdump unexpected packet %d", 1163 seq_no); 1164 } 1165 bt_dev_dbg(hu->hdev, 1166 "QCA memdump packet %d with length %d", 1167 seq_no, skb->len); 1168 hci_devcd_append(hu->hdev, skb); 1169 qca_memdump->current_seq_no += 1; 1170 qca_memdump->received_dump = rx_size; 1171 } else { 1172 bt_dev_err(hu->hdev, 1173 "QCA memdump received no space for packet %d", 1174 qca_memdump->current_seq_no); 1175 } 1176 1177 if (seq_no == QCA_LAST_SEQUENCE_NUM) { 1178 bt_dev_info(hu->hdev, 1179 "QCA memdump Done, received %d, total %d", 1180 qca_memdump->received_dump, 1181 qca_memdump->ram_dump_size); 1182 hci_devcd_complete(hu->hdev); 1183 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1184 kfree(qca->qca_memdump); 1185 qca->qca_memdump = NULL; 1186 qca->memdump_state = QCA_MEMDUMP_COLLECTED; 1187 clear_and_wake_up_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1188 } 1189 1190 mutex_unlock(&qca->hci_memdump_lock); 1191 } 1192 1193 } 1194 1195 static int qca_controller_memdump_event(struct hci_dev *hdev, 1196 struct sk_buff *skb) 1197 { 1198 struct hci_uart *hu = hci_get_drvdata(hdev); 1199 struct qca_data *qca = hu->priv; 1200 1201 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1202 skb_queue_tail(&qca->rx_memdump_q, skb); 1203 queue_work(qca->workqueue, &qca->ctrl_memdump_evt); 1204 1205 return 0; 1206 } 1207 1208 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb) 1209 { 1210 struct hci_uart *hu = hci_get_drvdata(hdev); 1211 struct qca_data *qca = hu->priv; 1212 1213 if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) { 1214 struct hci_event_hdr *hdr = (void *)skb->data; 1215 1216 /* For the WCN3990 the vendor command for a baudrate change 1217 * isn't sent as synchronous HCI command, because the 1218 * controller sends the corresponding vendor event with the 1219 * new baudrate. The event is received and properly decoded 1220 * after changing the baudrate of the host port. It needs to 1221 * be dropped, otherwise it can be misinterpreted as 1222 * response to a later firmware download command (also a 1223 * vendor command). 1224 */ 1225 1226 if (hdr->evt == HCI_EV_VENDOR) 1227 complete(&qca->drop_ev_comp); 1228 1229 kfree_skb(skb); 1230 1231 return 0; 1232 } 1233 /* We receive chip memory dump as an event packet, With a dedicated 1234 * handler followed by a hardware error event. When this event is 1235 * received we store dump into a file before closing hci. This 1236 * dump will help in triaging the issues. 1237 */ 1238 if ((skb->data[0] == HCI_VENDOR_PKT) && 1239 (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE)) 1240 return qca_controller_memdump_event(hdev, skb); 1241 1242 return hci_recv_frame(hdev, skb); 1243 } 1244 1245 #define QCA_IBS_SLEEP_IND_EVENT \ 1246 .type = HCI_IBS_SLEEP_IND, \ 1247 .hlen = 0, \ 1248 .loff = 0, \ 1249 .lsize = 0, \ 1250 .maxlen = HCI_MAX_IBS_SIZE 1251 1252 #define QCA_IBS_WAKE_IND_EVENT \ 1253 .type = HCI_IBS_WAKE_IND, \ 1254 .hlen = 0, \ 1255 .loff = 0, \ 1256 .lsize = 0, \ 1257 .maxlen = HCI_MAX_IBS_SIZE 1258 1259 #define QCA_IBS_WAKE_ACK_EVENT \ 1260 .type = HCI_IBS_WAKE_ACK, \ 1261 .hlen = 0, \ 1262 .loff = 0, \ 1263 .lsize = 0, \ 1264 .maxlen = HCI_MAX_IBS_SIZE 1265 1266 static const struct h4_recv_pkt qca_recv_pkts[] = { 1267 { H4_RECV_ACL, .recv = qca_recv_acl_data }, 1268 { H4_RECV_SCO, .recv = hci_recv_frame }, 1269 { H4_RECV_EVENT, .recv = qca_recv_event }, 1270 { H4_RECV_ISO, .recv = hci_recv_frame }, 1271 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind }, 1272 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack }, 1273 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind }, 1274 }; 1275 1276 static int qca_recv(struct hci_uart *hu, const void *data, int count) 1277 { 1278 struct qca_data *qca = hu->priv; 1279 1280 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 1281 return -EUNATCH; 1282 1283 qca->rx_skb = h4_recv_buf(hu, qca->rx_skb, data, count, 1284 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts)); 1285 if (IS_ERR(qca->rx_skb)) { 1286 int err = PTR_ERR(qca->rx_skb); 1287 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 1288 qca->rx_skb = NULL; 1289 return err; 1290 } 1291 1292 return count; 1293 } 1294 1295 static struct sk_buff *qca_dequeue(struct hci_uart *hu) 1296 { 1297 struct qca_data *qca = hu->priv; 1298 1299 return skb_dequeue(&qca->txq); 1300 } 1301 1302 static uint8_t qca_get_baudrate_value(int speed) 1303 { 1304 switch (speed) { 1305 case 9600: 1306 return QCA_BAUDRATE_9600; 1307 case 19200: 1308 return QCA_BAUDRATE_19200; 1309 case 38400: 1310 return QCA_BAUDRATE_38400; 1311 case 57600: 1312 return QCA_BAUDRATE_57600; 1313 case 115200: 1314 return QCA_BAUDRATE_115200; 1315 case 230400: 1316 return QCA_BAUDRATE_230400; 1317 case 460800: 1318 return QCA_BAUDRATE_460800; 1319 case 500000: 1320 return QCA_BAUDRATE_500000; 1321 case 921600: 1322 return QCA_BAUDRATE_921600; 1323 case 1000000: 1324 return QCA_BAUDRATE_1000000; 1325 case 2000000: 1326 return QCA_BAUDRATE_2000000; 1327 case 3000000: 1328 return QCA_BAUDRATE_3000000; 1329 case 3200000: 1330 return QCA_BAUDRATE_3200000; 1331 case 3500000: 1332 return QCA_BAUDRATE_3500000; 1333 default: 1334 return QCA_BAUDRATE_115200; 1335 } 1336 } 1337 1338 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate) 1339 { 1340 struct hci_uart *hu = hci_get_drvdata(hdev); 1341 struct qca_data *qca = hu->priv; 1342 struct sk_buff *skb; 1343 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 }; 1344 1345 if (baudrate > QCA_BAUDRATE_3200000) 1346 return -EINVAL; 1347 1348 cmd[4] = baudrate; 1349 1350 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL); 1351 if (!skb) { 1352 bt_dev_err(hdev, "Failed to allocate baudrate packet"); 1353 return -ENOMEM; 1354 } 1355 1356 /* Assign commands to change baudrate and packet type. */ 1357 skb_put_data(skb, cmd, sizeof(cmd)); 1358 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1359 1360 skb_queue_tail(&qca->txq, skb); 1361 hci_uart_tx_wakeup(hu); 1362 1363 /* Wait for the baudrate change request to be sent */ 1364 1365 while (!skb_queue_empty(&qca->txq)) 1366 usleep_range(100, 200); 1367 1368 if (hu->serdev) 1369 serdev_device_wait_until_sent(hu->serdev, 1370 CMD_TRANS_TIMEOUT); 1371 1372 /* Give the controller time to process the request */ 1373 switch (qca_soc_type(hu)) { 1374 case QCA_WCN3950: 1375 case QCA_WCN3988: 1376 case QCA_WCN3990: 1377 case QCA_WCN3991: 1378 case QCA_WCN3998: 1379 case QCA_WCN6750: 1380 case QCA_WCN6855: 1381 case QCA_WCN7850: 1382 usleep_range(1000, 10000); 1383 break; 1384 1385 default: 1386 msleep(300); 1387 } 1388 1389 return 0; 1390 } 1391 1392 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 1393 { 1394 if (hu->serdev) 1395 serdev_device_set_baudrate(hu->serdev, speed); 1396 else 1397 hci_uart_set_baudrate(hu, speed); 1398 } 1399 1400 static int qca_send_power_pulse(struct hci_uart *hu, bool on) 1401 { 1402 int timeout = CMD_TRANS_TIMEOUT; 1403 int ret; 1404 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE; 1405 1406 /* These power pulses are single byte command which are sent 1407 * at required baudrate to wcn3990. On wcn3990, we have an external 1408 * circuit at Tx pin which decodes the pulse sent at specific baudrate. 1409 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT 1410 * and also we use the same power inputs to turn on and off for 1411 * Wi-Fi/BT. Powering up the power sources will not enable BT, until 1412 * we send a power on pulse at 115200 bps. This algorithm will help to 1413 * save power. Disabling hardware flow control is mandatory while 1414 * sending power pulses to SoC. 1415 */ 1416 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd); 1417 1418 serdev_device_write_flush(hu->serdev); 1419 hci_uart_set_flow_control(hu, true); 1420 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 1421 if (ret < 0) { 1422 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd); 1423 return ret; 1424 } 1425 1426 serdev_device_wait_until_sent(hu->serdev, timeout); 1427 hci_uart_set_flow_control(hu, false); 1428 1429 /* Give to controller time to boot/shutdown */ 1430 if (on) 1431 msleep(100); 1432 else 1433 usleep_range(1000, 10000); 1434 1435 return 0; 1436 } 1437 1438 static unsigned int qca_get_speed(struct hci_uart *hu, 1439 enum qca_speed_type speed_type) 1440 { 1441 unsigned int speed = 0; 1442 1443 if (speed_type == QCA_INIT_SPEED) { 1444 if (hu->init_speed) 1445 speed = hu->init_speed; 1446 else if (hu->proto->init_speed) 1447 speed = hu->proto->init_speed; 1448 } else { 1449 if (hu->oper_speed) 1450 speed = hu->oper_speed; 1451 else if (hu->proto->oper_speed) 1452 speed = hu->proto->oper_speed; 1453 } 1454 1455 return speed; 1456 } 1457 1458 static int qca_check_speeds(struct hci_uart *hu) 1459 { 1460 switch (qca_soc_type(hu)) { 1461 case QCA_WCN3950: 1462 case QCA_WCN3988: 1463 case QCA_WCN3990: 1464 case QCA_WCN3991: 1465 case QCA_WCN3998: 1466 case QCA_WCN6750: 1467 case QCA_WCN6855: 1468 case QCA_WCN7850: 1469 if (!qca_get_speed(hu, QCA_INIT_SPEED) && 1470 !qca_get_speed(hu, QCA_OPER_SPEED)) 1471 return -EINVAL; 1472 break; 1473 1474 default: 1475 if (!qca_get_speed(hu, QCA_INIT_SPEED) || 1476 !qca_get_speed(hu, QCA_OPER_SPEED)) 1477 return -EINVAL; 1478 } 1479 1480 return 0; 1481 } 1482 1483 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type) 1484 { 1485 unsigned int speed, qca_baudrate; 1486 struct qca_data *qca = hu->priv; 1487 int ret = 0; 1488 1489 if (speed_type == QCA_INIT_SPEED) { 1490 speed = qca_get_speed(hu, QCA_INIT_SPEED); 1491 if (speed) 1492 host_set_baudrate(hu, speed); 1493 } else { 1494 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1495 1496 speed = qca_get_speed(hu, QCA_OPER_SPEED); 1497 if (!speed) 1498 return 0; 1499 1500 /* Disable flow control for wcn3990 to deassert RTS while 1501 * changing the baudrate of chip and host. 1502 */ 1503 switch (soc_type) { 1504 case QCA_WCN3950: 1505 case QCA_WCN3988: 1506 case QCA_WCN3990: 1507 case QCA_WCN3991: 1508 case QCA_WCN3998: 1509 case QCA_WCN6750: 1510 case QCA_WCN6855: 1511 case QCA_WCN7850: 1512 hci_uart_set_flow_control(hu, true); 1513 break; 1514 1515 default: 1516 break; 1517 } 1518 1519 switch (soc_type) { 1520 case QCA_WCN3990: 1521 reinit_completion(&qca->drop_ev_comp); 1522 set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1523 break; 1524 1525 default: 1526 break; 1527 } 1528 1529 qca_baudrate = qca_get_baudrate_value(speed); 1530 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed); 1531 ret = qca_set_baudrate(hu->hdev, qca_baudrate); 1532 if (ret) 1533 goto error; 1534 1535 host_set_baudrate(hu, speed); 1536 1537 error: 1538 switch (soc_type) { 1539 case QCA_WCN3950: 1540 case QCA_WCN3988: 1541 case QCA_WCN3990: 1542 case QCA_WCN3991: 1543 case QCA_WCN3998: 1544 case QCA_WCN6750: 1545 case QCA_WCN6855: 1546 case QCA_WCN7850: 1547 hci_uart_set_flow_control(hu, false); 1548 break; 1549 1550 default: 1551 break; 1552 } 1553 1554 switch (soc_type) { 1555 case QCA_WCN3990: 1556 /* Wait for the controller to send the vendor event 1557 * for the baudrate change command. 1558 */ 1559 if (!wait_for_completion_timeout(&qca->drop_ev_comp, 1560 msecs_to_jiffies(100))) { 1561 bt_dev_err(hu->hdev, 1562 "Failed to change controller baudrate\n"); 1563 ret = -ETIMEDOUT; 1564 } 1565 1566 clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1567 break; 1568 1569 default: 1570 break; 1571 } 1572 } 1573 1574 return ret; 1575 } 1576 1577 static int qca_send_crashbuffer(struct hci_uart *hu) 1578 { 1579 struct qca_data *qca = hu->priv; 1580 struct sk_buff *skb; 1581 1582 skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL); 1583 if (!skb) { 1584 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet"); 1585 return -ENOMEM; 1586 } 1587 1588 /* We forcefully crash the controller, by sending 0xfb byte for 1589 * 1024 times. We also might have chance of losing data, To be 1590 * on safer side we send 1096 bytes to the SoC. 1591 */ 1592 memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE, 1593 QCA_CRASHBYTE_PACKET_LEN); 1594 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1595 bt_dev_info(hu->hdev, "crash the soc to collect controller dump"); 1596 skb_queue_tail(&qca->txq, skb); 1597 hci_uart_tx_wakeup(hu); 1598 1599 return 0; 1600 } 1601 1602 static void qca_wait_for_dump_collection(struct hci_dev *hdev) 1603 { 1604 struct hci_uart *hu = hci_get_drvdata(hdev); 1605 struct qca_data *qca = hu->priv; 1606 1607 wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION, 1608 TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT); 1609 1610 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1611 } 1612 1613 static void qca_hw_error(struct hci_dev *hdev, u8 code) 1614 { 1615 struct hci_uart *hu = hci_get_drvdata(hdev); 1616 struct qca_data *qca = hu->priv; 1617 1618 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1619 set_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1620 bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state); 1621 1622 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1623 /* If hardware error event received for other than QCA 1624 * soc memory dump event, then we need to crash the SOC 1625 * and wait here for 8 seconds to get the dump packets. 1626 * This will block main thread to be on hold until we 1627 * collect dump. 1628 */ 1629 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1630 qca_send_crashbuffer(hu); 1631 qca_wait_for_dump_collection(hdev); 1632 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1633 /* Let us wait here until memory dump collected or 1634 * memory dump timer expired. 1635 */ 1636 bt_dev_info(hdev, "waiting for dump to complete"); 1637 qca_wait_for_dump_collection(hdev); 1638 } 1639 1640 mutex_lock(&qca->hci_memdump_lock); 1641 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1642 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout"); 1643 hci_devcd_abort(hu->hdev); 1644 if (qca->qca_memdump) { 1645 kfree(qca->qca_memdump); 1646 qca->qca_memdump = NULL; 1647 } 1648 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1649 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1650 } 1651 mutex_unlock(&qca->hci_memdump_lock); 1652 1653 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 1654 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 1655 cancel_work_sync(&qca->ctrl_memdump_evt); 1656 skb_queue_purge(&qca->rx_memdump_q); 1657 } 1658 1659 /* 1660 * If the BT chip's bt_en pin is connected to a 3.3V power supply via 1661 * hardware and always stays high, driver cannot control the bt_en pin. 1662 * As a result, during SSR (SubSystem Restart), QCA_SSR_TRIGGERED and 1663 * QCA_IBS_DISABLED flags cannot be cleared, which leads to a reset 1664 * command timeout. 1665 * Add an msleep delay to ensure controller completes the SSR process. 1666 * 1667 * Host will not download the firmware after SSR, controller to remain 1668 * in the IBS_WAKE state, and the host needs to synchronize with it 1669 * 1670 * Since the bluetooth chip has been reset, clear the memdump state. 1671 */ 1672 if (!hci_test_quirk(hu->hdev, HCI_QUIRK_NON_PERSISTENT_SETUP)) { 1673 /* 1674 * When the SSR (SubSystem Restart) duration exceeds 2 seconds, 1675 * it triggers host tx_idle_delay, which sets host TX state 1676 * to sleep. Reset tx_idle_timer after SSR to prevent 1677 * host enter TX IBS_Sleep mode. 1678 */ 1679 mod_timer(&qca->tx_idle_timer, jiffies + 1680 msecs_to_jiffies(qca->tx_idle_delay)); 1681 1682 /* Wait for the controller to load the rampatch and NVM. */ 1683 msleep(100); 1684 1685 clear_bit(QCA_SSR_TRIGGERED, &qca->flags); 1686 clear_bit(QCA_IBS_DISABLED, &qca->flags); 1687 1688 qca->tx_ibs_state = HCI_IBS_TX_AWAKE; 1689 qca->memdump_state = QCA_MEMDUMP_IDLE; 1690 } 1691 1692 clear_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1693 } 1694 1695 static void qca_reset(struct hci_dev *hdev) 1696 { 1697 struct hci_uart *hu = hci_get_drvdata(hdev); 1698 struct qca_data *qca = hu->priv; 1699 1700 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1701 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1702 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1703 qca_send_crashbuffer(hu); 1704 qca_wait_for_dump_collection(hdev); 1705 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1706 /* Let us wait here until memory dump collected or 1707 * memory dump timer expired. 1708 */ 1709 bt_dev_info(hdev, "waiting for dump to complete"); 1710 qca_wait_for_dump_collection(hdev); 1711 } 1712 1713 mutex_lock(&qca->hci_memdump_lock); 1714 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1715 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1716 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 1717 /* Inject hw error event to reset the device 1718 * and driver. 1719 */ 1720 hci_reset_dev(hu->hdev); 1721 } 1722 } 1723 mutex_unlock(&qca->hci_memdump_lock); 1724 } 1725 1726 static bool qca_wakeup(struct hci_dev *hdev) 1727 { 1728 struct hci_uart *hu = hci_get_drvdata(hdev); 1729 bool wakeup; 1730 1731 if (!hu->serdev) 1732 return true; 1733 1734 /* BT SoC attached through the serial bus is handled by the serdev driver. 1735 * So we need to use the device handle of the serdev driver to get the 1736 * status of device may wakeup. 1737 */ 1738 wakeup = device_may_wakeup(&hu->serdev->ctrl->dev); 1739 bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup); 1740 1741 return wakeup; 1742 } 1743 1744 static int qca_port_reopen(struct hci_uart *hu) 1745 { 1746 int ret; 1747 1748 /* Now the device is in ready state to communicate with host. 1749 * To sync host with device we need to reopen port. 1750 * Without this, we will have RTS and CTS synchronization 1751 * issues. 1752 */ 1753 serdev_device_close(hu->serdev); 1754 ret = serdev_device_open(hu->serdev); 1755 if (ret) { 1756 bt_dev_err(hu->hdev, "failed to open port"); 1757 return ret; 1758 } 1759 1760 hci_uart_set_flow_control(hu, false); 1761 1762 return 0; 1763 } 1764 1765 static int qca_regulator_init(struct hci_uart *hu) 1766 { 1767 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1768 struct qca_serdev *qcadev; 1769 int ret; 1770 bool sw_ctrl_state; 1771 1772 /* Check for vregs status, may be hci down has turned 1773 * off the voltage regulator. 1774 */ 1775 qcadev = serdev_device_get_drvdata(hu->serdev); 1776 1777 if (!qcadev->bt_power->vregs_on) { 1778 serdev_device_close(hu->serdev); 1779 ret = qca_regulator_enable(qcadev); 1780 if (ret) 1781 return ret; 1782 1783 ret = serdev_device_open(hu->serdev); 1784 if (ret) { 1785 bt_dev_err(hu->hdev, "failed to open port"); 1786 return ret; 1787 } 1788 } 1789 1790 switch (soc_type) { 1791 case QCA_WCN3950: 1792 case QCA_WCN3988: 1793 case QCA_WCN3990: 1794 case QCA_WCN3991: 1795 case QCA_WCN3998: 1796 /* Forcefully enable wcn399x to enter in to boot mode. */ 1797 host_set_baudrate(hu, 2400); 1798 ret = qca_send_power_pulse(hu, false); 1799 if (ret) 1800 return ret; 1801 break; 1802 1803 default: 1804 break; 1805 } 1806 1807 /* For wcn6750 need to enable gpio bt_en */ 1808 if (qcadev->bt_en) { 1809 gpiod_set_value_cansleep(qcadev->bt_en, 0); 1810 msleep(50); 1811 gpiod_set_value_cansleep(qcadev->bt_en, 1); 1812 msleep(50); 1813 if (qcadev->sw_ctrl) { 1814 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); 1815 bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state); 1816 } 1817 } 1818 1819 qca_set_speed(hu, QCA_INIT_SPEED); 1820 1821 switch (soc_type) { 1822 case QCA_WCN3950: 1823 case QCA_WCN3988: 1824 case QCA_WCN3990: 1825 case QCA_WCN3991: 1826 case QCA_WCN3998: 1827 ret = qca_send_power_pulse(hu, true); 1828 if (ret) 1829 return ret; 1830 break; 1831 1832 default: 1833 break; 1834 } 1835 1836 return qca_port_reopen(hu); 1837 } 1838 1839 static int qca_power_on(struct hci_dev *hdev) 1840 { 1841 struct hci_uart *hu = hci_get_drvdata(hdev); 1842 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1843 struct qca_serdev *qcadev; 1844 struct qca_data *qca = hu->priv; 1845 int ret = 0; 1846 1847 /* Non-serdev device usually is powered by external power 1848 * and don't need additional action in driver for power on 1849 */ 1850 if (!hu->serdev) 1851 return 0; 1852 1853 switch (soc_type) { 1854 case QCA_QCA6390: 1855 case QCA_WCN3950: 1856 case QCA_WCN3988: 1857 case QCA_WCN3990: 1858 case QCA_WCN3991: 1859 case QCA_WCN3998: 1860 case QCA_WCN6750: 1861 case QCA_WCN6855: 1862 case QCA_WCN7850: 1863 ret = qca_regulator_init(hu); 1864 break; 1865 1866 default: 1867 qcadev = serdev_device_get_drvdata(hu->serdev); 1868 if (qcadev->bt_en) { 1869 gpiod_set_value_cansleep(qcadev->bt_en, 1); 1870 /* Controller needs time to bootup. */ 1871 msleep(150); 1872 } 1873 } 1874 1875 clear_bit(QCA_BT_OFF, &qca->flags); 1876 return ret; 1877 } 1878 1879 static void hci_coredump_qca(struct hci_dev *hdev) 1880 { 1881 int err; 1882 static const u8 param[] = { 0x26 }; 1883 1884 err = __hci_cmd_send(hdev, 0xfc0c, 1, param); 1885 if (err < 0) 1886 bt_dev_err(hdev, "%s: trigger crash failed (%d)", __func__, err); 1887 } 1888 1889 static int qca_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id) 1890 { 1891 /* QCA uses 1 as non-HCI data path id for HFP */ 1892 *data_path_id = 1; 1893 return 0; 1894 } 1895 1896 static int qca_configure_hfp_offload(struct hci_dev *hdev) 1897 { 1898 bt_dev_info(hdev, "HFP non-HCI data transport is supported"); 1899 hdev->get_data_path_id = qca_get_data_path_id; 1900 /* Do not need to send HCI_Configure_Data_Path to configure non-HCI 1901 * data transport path for QCA controllers, so set below field as NULL. 1902 */ 1903 hdev->get_codec_config_data = NULL; 1904 return 0; 1905 } 1906 1907 static int qca_setup(struct hci_uart *hu) 1908 { 1909 struct hci_dev *hdev = hu->hdev; 1910 struct qca_data *qca = hu->priv; 1911 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200; 1912 unsigned int retries = 0; 1913 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1914 const char *firmware_name = qca_get_firmware_name(hu); 1915 const char *rampatch_name = qca_get_rampatch_name(hu); 1916 int ret; 1917 struct qca_btsoc_version ver; 1918 struct qca_serdev *qcadev = NULL; 1919 const char *soc_name; 1920 1921 if (hu->serdev) 1922 qcadev = serdev_device_get_drvdata(hu->serdev); 1923 1924 ret = qca_check_speeds(hu); 1925 if (ret) 1926 return ret; 1927 1928 clear_bit(QCA_ROM_FW, &qca->flags); 1929 /* Patch downloading has to be done without IBS mode */ 1930 set_bit(QCA_IBS_DISABLED, &qca->flags); 1931 1932 /* Enable controller to do both LE scan and BR/EDR inquiry 1933 * simultaneously. 1934 */ 1935 hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY); 1936 1937 switch (soc_type) { 1938 case QCA_QCA2066: 1939 soc_name = "qca2066"; 1940 break; 1941 1942 case QCA_WCN3950: 1943 case QCA_WCN3988: 1944 case QCA_WCN3990: 1945 case QCA_WCN3991: 1946 case QCA_WCN3998: 1947 soc_name = "wcn399x"; 1948 break; 1949 1950 case QCA_WCN6750: 1951 soc_name = "wcn6750"; 1952 break; 1953 1954 case QCA_WCN6855: 1955 soc_name = "wcn6855"; 1956 break; 1957 1958 case QCA_WCN7850: 1959 soc_name = "wcn7850"; 1960 break; 1961 1962 default: 1963 soc_name = "ROME/QCA6390"; 1964 } 1965 bt_dev_info(hdev, "setting up %s", soc_name); 1966 1967 qca->memdump_state = QCA_MEMDUMP_IDLE; 1968 1969 retry: 1970 ret = qca_power_on(hdev); 1971 if (ret) 1972 goto out; 1973 1974 clear_bit(QCA_SSR_TRIGGERED, &qca->flags); 1975 1976 switch (soc_type) { 1977 case QCA_WCN3950: 1978 case QCA_WCN3988: 1979 case QCA_WCN3990: 1980 case QCA_WCN3991: 1981 case QCA_WCN3998: 1982 case QCA_WCN6750: 1983 case QCA_WCN6855: 1984 case QCA_WCN7850: 1985 if (qcadev && qcadev->bdaddr_property_broken) 1986 hci_set_quirk(hdev, HCI_QUIRK_BDADDR_PROPERTY_BROKEN); 1987 1988 hci_set_aosp_capable(hdev); 1989 1990 ret = qca_read_soc_version(hdev, &ver, soc_type); 1991 if (ret) 1992 goto out; 1993 break; 1994 1995 default: 1996 qca_set_speed(hu, QCA_INIT_SPEED); 1997 } 1998 1999 /* Setup user speed if needed */ 2000 speed = qca_get_speed(hu, QCA_OPER_SPEED); 2001 if (speed) { 2002 ret = qca_set_speed(hu, QCA_OPER_SPEED); 2003 if (ret) 2004 goto out; 2005 2006 qca_baudrate = qca_get_baudrate_value(speed); 2007 } 2008 2009 switch (soc_type) { 2010 case QCA_WCN3950: 2011 case QCA_WCN3988: 2012 case QCA_WCN3990: 2013 case QCA_WCN3991: 2014 case QCA_WCN3998: 2015 case QCA_WCN6750: 2016 case QCA_WCN6855: 2017 case QCA_WCN7850: 2018 break; 2019 2020 default: 2021 /* Get QCA version information */ 2022 ret = qca_read_soc_version(hdev, &ver, soc_type); 2023 if (ret) 2024 goto out; 2025 } 2026 2027 /* Setup patch / NVM configurations */ 2028 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver, 2029 firmware_name, rampatch_name); 2030 if (!ret) { 2031 clear_bit(QCA_IBS_DISABLED, &qca->flags); 2032 qca_debugfs_init(hdev); 2033 hu->hdev->hw_error = qca_hw_error; 2034 hu->hdev->reset = qca_reset; 2035 if (hu->serdev) { 2036 if (device_can_wakeup(hu->serdev->ctrl->dev.parent)) 2037 hu->hdev->wakeup = qca_wakeup; 2038 } 2039 } else if (ret == -ENOENT) { 2040 /* No patch/nvm-config found, run with original fw/config */ 2041 set_bit(QCA_ROM_FW, &qca->flags); 2042 ret = 0; 2043 } else if (ret == -EAGAIN) { 2044 /* 2045 * Userspace firmware loader will return -EAGAIN in case no 2046 * patch/nvm-config is found, so run with original fw/config. 2047 */ 2048 set_bit(QCA_ROM_FW, &qca->flags); 2049 ret = 0; 2050 } 2051 2052 out: 2053 if (ret) { 2054 qca_power_off(hu); 2055 2056 if (retries < MAX_INIT_RETRIES) { 2057 bt_dev_warn(hdev, "Retry BT power ON:%d", retries); 2058 if (hu->serdev) { 2059 serdev_device_close(hu->serdev); 2060 ret = serdev_device_open(hu->serdev); 2061 if (ret) { 2062 bt_dev_err(hdev, "failed to open port"); 2063 return ret; 2064 } 2065 } 2066 retries++; 2067 goto retry; 2068 } 2069 return ret; 2070 } 2071 2072 /* Setup bdaddr */ 2073 if (soc_type == QCA_ROME) 2074 hu->hdev->set_bdaddr = qca_set_bdaddr_rome; 2075 else 2076 hu->hdev->set_bdaddr = qca_set_bdaddr; 2077 2078 if (qcadev && qcadev->support_hfp_hw_offload) 2079 qca_configure_hfp_offload(hdev); 2080 2081 qca->fw_version = le16_to_cpu(ver.patch_ver); 2082 qca->controller_id = le16_to_cpu(ver.rom_ver); 2083 hci_devcd_register(hdev, hci_coredump_qca, qca_dmp_hdr, NULL); 2084 2085 return ret; 2086 } 2087 2088 static const struct hci_uart_proto qca_proto = { 2089 .id = HCI_UART_QCA, 2090 .name = "QCA", 2091 .manufacturer = 29, 2092 .init_speed = 115200, 2093 .oper_speed = 3000000, 2094 .open = qca_open, 2095 .close = qca_close, 2096 .flush = qca_flush, 2097 .setup = qca_setup, 2098 .recv = qca_recv, 2099 .enqueue = qca_enqueue, 2100 .dequeue = qca_dequeue, 2101 }; 2102 2103 static const struct qca_device_data qca_soc_data_qca2066 __maybe_unused = { 2104 .soc_type = QCA_QCA2066, 2105 .num_vregs = 0, 2106 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES | 2107 QCA_CAP_HFP_HW_OFFLOAD, 2108 }; 2109 2110 static const struct qca_device_data qca_soc_data_qca6390 __maybe_unused = { 2111 .soc_type = QCA_QCA6390, 2112 .num_vregs = 0, 2113 }; 2114 2115 static const struct qca_device_data qca_soc_data_wcn3950 __maybe_unused = { 2116 .soc_type = QCA_WCN3950, 2117 .vregs = (struct qca_vreg []) { 2118 { "vddio", 15000 }, 2119 { "vddxo", 60000 }, 2120 { "vddrf", 155000 }, 2121 { "vddch0", 585000 }, 2122 }, 2123 .num_vregs = 4, 2124 }; 2125 2126 static const struct qca_device_data qca_soc_data_wcn3988 __maybe_unused = { 2127 .soc_type = QCA_WCN3988, 2128 .vregs = (struct qca_vreg []) { 2129 { "vddio", 15000 }, 2130 { "vddxo", 80000 }, 2131 { "vddrf", 300000 }, 2132 { "vddch0", 450000 }, 2133 }, 2134 .num_vregs = 4, 2135 }; 2136 2137 static const struct qca_device_data qca_soc_data_wcn3990 __maybe_unused = { 2138 .soc_type = QCA_WCN3990, 2139 .vregs = (struct qca_vreg []) { 2140 { "vddio", 15000 }, 2141 { "vddxo", 80000 }, 2142 { "vddrf", 300000 }, 2143 { "vddch0", 450000 }, 2144 }, 2145 .num_vregs = 4, 2146 }; 2147 2148 static const struct qca_device_data qca_soc_data_wcn3991 __maybe_unused = { 2149 .soc_type = QCA_WCN3991, 2150 .vregs = (struct qca_vreg []) { 2151 { "vddio", 15000 }, 2152 { "vddxo", 80000 }, 2153 { "vddrf", 300000 }, 2154 { "vddch0", 450000 }, 2155 }, 2156 .num_vregs = 4, 2157 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES, 2158 }; 2159 2160 static const struct qca_device_data qca_soc_data_wcn3998 __maybe_unused = { 2161 .soc_type = QCA_WCN3998, 2162 .vregs = (struct qca_vreg []) { 2163 { "vddio", 10000 }, 2164 { "vddxo", 80000 }, 2165 { "vddrf", 300000 }, 2166 { "vddch0", 450000 }, 2167 }, 2168 .num_vregs = 4, 2169 }; 2170 2171 static const struct qca_device_data qca_soc_data_wcn6750 __maybe_unused = { 2172 .soc_type = QCA_WCN6750, 2173 .vregs = (struct qca_vreg []) { 2174 { "vddio", 5000 }, 2175 { "vddaon", 26000 }, 2176 { "vddbtcxmx", 126000 }, 2177 { "vddrfacmn", 12500 }, 2178 { "vddrfa0p8", 102000 }, 2179 { "vddrfa1p7", 302000 }, 2180 { "vddrfa1p2", 257000 }, 2181 { "vddrfa2p2", 1700000 }, 2182 { "vddasd", 200 }, 2183 }, 2184 .num_vregs = 9, 2185 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES, 2186 }; 2187 2188 static const struct qca_device_data qca_soc_data_wcn6855 __maybe_unused = { 2189 .soc_type = QCA_WCN6855, 2190 .vregs = (struct qca_vreg []) { 2191 { "vddio", 5000 }, 2192 { "vddbtcxmx", 126000 }, 2193 { "vddrfacmn", 12500 }, 2194 { "vddrfa0p8", 102000 }, 2195 { "vddrfa1p7", 302000 }, 2196 { "vddrfa1p2", 257000 }, 2197 }, 2198 .num_vregs = 6, 2199 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES | 2200 QCA_CAP_HFP_HW_OFFLOAD, 2201 }; 2202 2203 static const struct qca_device_data qca_soc_data_wcn7850 __maybe_unused = { 2204 .soc_type = QCA_WCN7850, 2205 .vregs = (struct qca_vreg []) { 2206 { "vddio", 5000 }, 2207 { "vddaon", 26000 }, 2208 { "vdddig", 126000 }, 2209 { "vddrfa0p8", 102000 }, 2210 { "vddrfa1p2", 257000 }, 2211 { "vddrfa1p9", 302000 }, 2212 }, 2213 .num_vregs = 6, 2214 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES | 2215 QCA_CAP_HFP_HW_OFFLOAD, 2216 }; 2217 2218 static void qca_power_off(struct hci_uart *hu) 2219 { 2220 struct qca_serdev *qcadev; 2221 struct qca_data *qca = hu->priv; 2222 unsigned long flags; 2223 enum qca_btsoc_type soc_type = qca_soc_type(hu); 2224 bool sw_ctrl_state; 2225 struct qca_power *power; 2226 2227 /* From this point we go into power off state. But serial port is 2228 * still open, stop queueing the IBS data and flush all the buffered 2229 * data in skb's. 2230 */ 2231 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 2232 set_bit(QCA_IBS_DISABLED, &qca->flags); 2233 qca_flush(hu); 2234 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 2235 2236 /* Non-serdev device usually is powered by external power 2237 * and don't need additional action in driver for power down 2238 */ 2239 if (!hu->serdev) 2240 return; 2241 2242 qcadev = serdev_device_get_drvdata(hu->serdev); 2243 power = qcadev->bt_power; 2244 2245 switch (soc_type) { 2246 case QCA_WCN3988: 2247 case QCA_WCN3990: 2248 case QCA_WCN3991: 2249 case QCA_WCN3998: 2250 host_set_baudrate(hu, 2400); 2251 qca_send_power_pulse(hu, false); 2252 break; 2253 default: 2254 break; 2255 } 2256 2257 if (power && power->pwrseq) { 2258 pwrseq_power_off(power->pwrseq); 2259 set_bit(QCA_BT_OFF, &qca->flags); 2260 return; 2261 } 2262 2263 switch (soc_type) { 2264 case QCA_WCN3988: 2265 case QCA_WCN3990: 2266 case QCA_WCN3991: 2267 case QCA_WCN3998: 2268 qca_regulator_disable(qcadev); 2269 break; 2270 2271 case QCA_WCN6750: 2272 case QCA_WCN6855: 2273 gpiod_set_value_cansleep(qcadev->bt_en, 0); 2274 msleep(100); 2275 qca_regulator_disable(qcadev); 2276 if (qcadev->sw_ctrl) { 2277 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); 2278 BT_DBG("SW_CTRL is %d", sw_ctrl_state); 2279 } 2280 break; 2281 2282 default: 2283 gpiod_set_value_cansleep(qcadev->bt_en, 0); 2284 } 2285 2286 set_bit(QCA_BT_OFF, &qca->flags); 2287 } 2288 2289 static int qca_hci_shutdown(struct hci_dev *hdev) 2290 { 2291 struct hci_uart *hu = hci_get_drvdata(hdev); 2292 struct qca_data *qca = hu->priv; 2293 enum qca_btsoc_type soc_type = qca_soc_type(hu); 2294 2295 hu->hdev->hw_error = NULL; 2296 hu->hdev->reset = NULL; 2297 2298 timer_delete_sync(&qca->wake_retrans_timer); 2299 timer_delete_sync(&qca->tx_idle_timer); 2300 2301 /* Stop sending shutdown command if soc crashes. */ 2302 if (soc_type != QCA_ROME 2303 && qca->memdump_state == QCA_MEMDUMP_IDLE) { 2304 qca_send_pre_shutdown_cmd(hdev); 2305 usleep_range(8000, 10000); 2306 } 2307 2308 qca_power_off(hu); 2309 return 0; 2310 } 2311 2312 static int qca_regulator_enable(struct qca_serdev *qcadev) 2313 { 2314 struct qca_power *power = qcadev->bt_power; 2315 int ret; 2316 2317 if (power->pwrseq) 2318 return pwrseq_power_on(power->pwrseq); 2319 2320 /* Already enabled */ 2321 if (power->vregs_on) 2322 return 0; 2323 2324 BT_DBG("enabling %d regulators)", power->num_vregs); 2325 2326 ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk); 2327 if (ret) 2328 return ret; 2329 2330 power->vregs_on = true; 2331 2332 ret = clk_prepare_enable(qcadev->susclk); 2333 if (ret) 2334 qca_regulator_disable(qcadev); 2335 2336 return ret; 2337 } 2338 2339 static void qca_regulator_disable(struct qca_serdev *qcadev) 2340 { 2341 struct qca_power *power; 2342 2343 if (!qcadev) 2344 return; 2345 2346 power = qcadev->bt_power; 2347 2348 /* Already disabled? */ 2349 if (!power->vregs_on) 2350 return; 2351 2352 regulator_bulk_disable(power->num_vregs, power->vreg_bulk); 2353 power->vregs_on = false; 2354 2355 clk_disable_unprepare(qcadev->susclk); 2356 } 2357 2358 static int qca_init_regulators(struct qca_power *qca, 2359 const struct qca_vreg *vregs, size_t num_vregs) 2360 { 2361 struct regulator_bulk_data *bulk; 2362 int ret; 2363 int i; 2364 2365 bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL); 2366 if (!bulk) 2367 return -ENOMEM; 2368 2369 for (i = 0; i < num_vregs; i++) 2370 bulk[i].supply = vregs[i].name; 2371 2372 ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk); 2373 if (ret < 0) 2374 return ret; 2375 2376 for (i = 0; i < num_vregs; i++) { 2377 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA); 2378 if (ret) 2379 return ret; 2380 } 2381 2382 qca->vreg_bulk = bulk; 2383 qca->num_vregs = num_vregs; 2384 2385 return 0; 2386 } 2387 2388 static int qca_serdev_probe(struct serdev_device *serdev) 2389 { 2390 struct qca_serdev *qcadev; 2391 struct hci_dev *hdev; 2392 const struct qca_device_data *data; 2393 int err; 2394 bool power_ctrl_enabled = true; 2395 2396 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL); 2397 if (!qcadev) 2398 return -ENOMEM; 2399 2400 qcadev->serdev_hu.serdev = serdev; 2401 data = device_get_match_data(&serdev->dev); 2402 serdev_device_set_drvdata(serdev, qcadev); 2403 device_property_read_string_array(&serdev->dev, "firmware-name", 2404 qcadev->firmware_name, ARRAY_SIZE(qcadev->firmware_name)); 2405 device_property_read_u32(&serdev->dev, "max-speed", 2406 &qcadev->oper_speed); 2407 if (!qcadev->oper_speed) 2408 BT_DBG("UART will pick default operating speed"); 2409 2410 qcadev->bdaddr_property_broken = device_property_read_bool(&serdev->dev, 2411 "qcom,local-bd-address-broken"); 2412 2413 if (data) 2414 qcadev->btsoc_type = data->soc_type; 2415 else 2416 qcadev->btsoc_type = QCA_ROME; 2417 2418 switch (qcadev->btsoc_type) { 2419 case QCA_QCA6390: 2420 case QCA_WCN3950: 2421 case QCA_WCN3988: 2422 case QCA_WCN3990: 2423 case QCA_WCN3991: 2424 case QCA_WCN3998: 2425 case QCA_WCN6750: 2426 case QCA_WCN6855: 2427 case QCA_WCN7850: 2428 qcadev->bt_power = devm_kzalloc(&serdev->dev, 2429 sizeof(struct qca_power), 2430 GFP_KERNEL); 2431 if (!qcadev->bt_power) 2432 return -ENOMEM; 2433 break; 2434 default: 2435 break; 2436 } 2437 2438 switch (qcadev->btsoc_type) { 2439 case QCA_WCN3950: 2440 case QCA_WCN3988: 2441 case QCA_WCN3990: 2442 case QCA_WCN3991: 2443 case QCA_WCN3998: 2444 case QCA_WCN6750: 2445 case QCA_WCN6855: 2446 case QCA_WCN7850: 2447 if (!device_property_present(&serdev->dev, "enable-gpios")) { 2448 /* 2449 * Backward compatibility with old DT sources. If the 2450 * node doesn't have the 'enable-gpios' property then 2451 * let's use the power sequencer. Otherwise, let's 2452 * drive everything ourselves. 2453 */ 2454 qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev, 2455 "bluetooth"); 2456 2457 /* 2458 * Some modules have BT_EN enabled via a hardware pull-up, 2459 * meaning it is not defined in the DTS and is not controlled 2460 * through the power sequence. In such cases, fall through 2461 * to follow the legacy flow. 2462 */ 2463 if (IS_ERR(qcadev->bt_power->pwrseq)) 2464 qcadev->bt_power->pwrseq = NULL; 2465 else 2466 break; 2467 } 2468 2469 qcadev->bt_power->dev = &serdev->dev; 2470 err = qca_init_regulators(qcadev->bt_power, data->vregs, 2471 data->num_vregs); 2472 if (err) { 2473 BT_ERR("Failed to init regulators:%d", err); 2474 return err; 2475 } 2476 2477 qcadev->bt_power->vregs_on = false; 2478 2479 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", 2480 GPIOD_OUT_LOW); 2481 if (IS_ERR(qcadev->bt_en)) 2482 return dev_err_probe(&serdev->dev, 2483 PTR_ERR(qcadev->bt_en), 2484 "failed to acquire BT_EN gpio\n"); 2485 2486 if (!qcadev->bt_en && 2487 (data->soc_type == QCA_WCN6750 || 2488 data->soc_type == QCA_WCN6855 || 2489 data->soc_type == QCA_WCN7850)) 2490 power_ctrl_enabled = false; 2491 2492 qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl", 2493 GPIOD_IN); 2494 if (IS_ERR(qcadev->sw_ctrl) && 2495 (data->soc_type == QCA_WCN6750 || 2496 data->soc_type == QCA_WCN6855 || 2497 data->soc_type == QCA_WCN7850)) { 2498 dev_err(&serdev->dev, "failed to acquire SW_CTRL gpio\n"); 2499 return PTR_ERR(qcadev->sw_ctrl); 2500 } 2501 2502 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); 2503 if (IS_ERR(qcadev->susclk)) { 2504 dev_err(&serdev->dev, "failed to acquire clk\n"); 2505 return PTR_ERR(qcadev->susclk); 2506 } 2507 break; 2508 2509 case QCA_QCA6390: 2510 if (dev_of_node(&serdev->dev)) { 2511 qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev, 2512 "bluetooth"); 2513 if (IS_ERR(qcadev->bt_power->pwrseq)) 2514 return PTR_ERR(qcadev->bt_power->pwrseq); 2515 break; 2516 } 2517 fallthrough; 2518 2519 default: 2520 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", 2521 GPIOD_OUT_LOW); 2522 if (IS_ERR(qcadev->bt_en)) { 2523 dev_err(&serdev->dev, "failed to acquire enable gpio\n"); 2524 return PTR_ERR(qcadev->bt_en); 2525 } 2526 2527 if (!qcadev->bt_en) 2528 power_ctrl_enabled = false; 2529 2530 qcadev->susclk = devm_clk_get_optional_enabled_with_rate( 2531 &serdev->dev, NULL, SUSCLK_RATE_32KHZ); 2532 if (IS_ERR(qcadev->susclk)) { 2533 dev_warn(&serdev->dev, "failed to acquire clk\n"); 2534 return PTR_ERR(qcadev->susclk); 2535 } 2536 } 2537 2538 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); 2539 if (err) { 2540 BT_ERR("serdev registration failed"); 2541 return err; 2542 } 2543 2544 hdev = qcadev->serdev_hu.hdev; 2545 2546 if (power_ctrl_enabled) { 2547 hci_set_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_SETUP); 2548 hdev->shutdown = qca_hci_shutdown; 2549 } 2550 2551 if (data) { 2552 /* Wideband speech support must be set per driver since it can't 2553 * be queried via hci. Same with the valid le states quirk. 2554 */ 2555 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH) 2556 hci_set_quirk(hdev, 2557 HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED); 2558 2559 if (!(data->capabilities & QCA_CAP_VALID_LE_STATES)) 2560 hci_set_quirk(hdev, HCI_QUIRK_BROKEN_LE_STATES); 2561 2562 if (data->capabilities & QCA_CAP_HFP_HW_OFFLOAD) 2563 qcadev->support_hfp_hw_offload = true; 2564 } 2565 2566 return 0; 2567 } 2568 2569 static void qca_serdev_remove(struct serdev_device *serdev) 2570 { 2571 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2572 struct qca_power *power = qcadev->bt_power; 2573 2574 switch (qcadev->btsoc_type) { 2575 case QCA_WCN3988: 2576 case QCA_WCN3990: 2577 case QCA_WCN3991: 2578 case QCA_WCN3998: 2579 case QCA_WCN6750: 2580 case QCA_WCN6855: 2581 case QCA_WCN7850: 2582 if (power->vregs_on) 2583 qca_power_off(&qcadev->serdev_hu); 2584 break; 2585 default: 2586 break; 2587 } 2588 2589 hci_uart_unregister_device(&qcadev->serdev_hu); 2590 } 2591 2592 static void qca_serdev_shutdown(struct serdev_device *serdev) 2593 { 2594 int ret; 2595 int timeout = CMD_TRANS_TIMEOUT; 2596 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2597 struct hci_uart *hu = &qcadev->serdev_hu; 2598 struct hci_dev *hdev = hu->hdev; 2599 const u8 ibs_wake_cmd[] = { 0xFD }; 2600 const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 }; 2601 2602 if (qcadev->btsoc_type == QCA_QCA6390) { 2603 /* The purpose of sending the VSC is to reset SOC into a initial 2604 * state and the state will ensure next hdev->setup() success. 2605 * if HCI_QUIRK_NON_PERSISTENT_SETUP is set, it means that 2606 * hdev->setup() can do its job regardless of SoC state, so 2607 * don't need to send the VSC. 2608 * if HCI_SETUP is set, it means that hdev->setup() was never 2609 * invoked and the SOC is already in the initial state, so 2610 * don't also need to send the VSC. 2611 */ 2612 if (hci_test_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_SETUP) || 2613 hci_dev_test_flag(hdev, HCI_SETUP)) 2614 return; 2615 2616 /* The serdev must be in open state when control logic arrives 2617 * here, so also fix the use-after-free issue caused by that 2618 * the serdev is flushed or wrote after it is closed. 2619 */ 2620 serdev_device_write_flush(serdev); 2621 ret = serdev_device_write_buf(serdev, ibs_wake_cmd, 2622 sizeof(ibs_wake_cmd)); 2623 if (ret < 0) { 2624 BT_ERR("QCA send IBS_WAKE_IND error: %d", ret); 2625 return; 2626 } 2627 serdev_device_wait_until_sent(serdev, timeout); 2628 usleep_range(8000, 10000); 2629 2630 serdev_device_write_flush(serdev); 2631 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd, 2632 sizeof(edl_reset_soc_cmd)); 2633 if (ret < 0) { 2634 BT_ERR("QCA send EDL_RESET_REQ error: %d", ret); 2635 return; 2636 } 2637 serdev_device_wait_until_sent(serdev, timeout); 2638 usleep_range(8000, 10000); 2639 } 2640 } 2641 2642 static int __maybe_unused qca_suspend(struct device *dev) 2643 { 2644 struct serdev_device *serdev = to_serdev_device(dev); 2645 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2646 struct hci_uart *hu = &qcadev->serdev_hu; 2647 struct qca_data *qca = hu->priv; 2648 unsigned long flags; 2649 bool tx_pending = false; 2650 int ret = 0; 2651 u8 cmd; 2652 unsigned long wait_timeout = 0; 2653 2654 set_bit(QCA_SUSPENDING, &qca->flags); 2655 2656 /* if BT SoC is running with default firmware then it does not 2657 * support in-band sleep 2658 */ 2659 if (test_bit(QCA_ROM_FW, &qca->flags)) 2660 return 0; 2661 2662 /* During SSR after memory dump collection, controller will be 2663 * powered off and then powered on.If controller is powered off 2664 * during SSR then we should wait until SSR is completed. 2665 */ 2666 if (test_bit(QCA_BT_OFF, &qca->flags) && 2667 !test_bit(QCA_SSR_TRIGGERED, &qca->flags)) 2668 return 0; 2669 2670 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 2671 test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 2672 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ? 2673 IBS_DISABLE_SSR_TIMEOUT : 2674 FW_DOWNLOAD_TIMEOUT; 2675 2676 /* QCA_IBS_DISABLED flag is set to true, During FW download 2677 * and during memory dump collection. It is reset to false, 2678 * After FW download complete. 2679 */ 2680 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED, 2681 TASK_UNINTERRUPTIBLE, wait_timeout); 2682 2683 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) { 2684 bt_dev_err(hu->hdev, "SSR or FW download time out"); 2685 ret = -ETIMEDOUT; 2686 goto error; 2687 } 2688 } 2689 2690 cancel_work_sync(&qca->ws_awake_device); 2691 cancel_work_sync(&qca->ws_awake_rx); 2692 2693 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 2694 flags, SINGLE_DEPTH_NESTING); 2695 2696 switch (qca->tx_ibs_state) { 2697 case HCI_IBS_TX_WAKING: 2698 timer_delete(&qca->wake_retrans_timer); 2699 fallthrough; 2700 case HCI_IBS_TX_AWAKE: 2701 timer_delete(&qca->tx_idle_timer); 2702 2703 serdev_device_write_flush(hu->serdev); 2704 cmd = HCI_IBS_SLEEP_IND; 2705 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 2706 2707 if (ret < 0) { 2708 BT_ERR("Failed to send SLEEP to device"); 2709 break; 2710 } 2711 2712 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 2713 qca->ibs_sent_slps++; 2714 tx_pending = true; 2715 break; 2716 2717 case HCI_IBS_TX_ASLEEP: 2718 break; 2719 2720 default: 2721 BT_ERR("Spurious tx state %d", qca->tx_ibs_state); 2722 ret = -EINVAL; 2723 break; 2724 } 2725 2726 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 2727 2728 if (ret < 0) 2729 goto error; 2730 2731 if (tx_pending) { 2732 serdev_device_wait_until_sent(hu->serdev, 2733 CMD_TRANS_TIMEOUT); 2734 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 2735 } 2736 2737 /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going 2738 * to sleep, so that the packet does not wake the system later. 2739 */ 2740 ret = wait_event_interruptible_timeout(qca->suspend_wait_q, 2741 qca->rx_ibs_state == HCI_IBS_RX_ASLEEP, 2742 IBS_BTSOC_TX_IDLE_TIMEOUT); 2743 if (ret == 0) { 2744 ret = -ETIMEDOUT; 2745 goto error; 2746 } 2747 2748 return 0; 2749 2750 error: 2751 clear_bit(QCA_SUSPENDING, &qca->flags); 2752 2753 return ret; 2754 } 2755 2756 static int __maybe_unused qca_resume(struct device *dev) 2757 { 2758 struct serdev_device *serdev = to_serdev_device(dev); 2759 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2760 struct hci_uart *hu = &qcadev->serdev_hu; 2761 struct qca_data *qca = hu->priv; 2762 2763 clear_bit(QCA_SUSPENDING, &qca->flags); 2764 2765 return 0; 2766 } 2767 2768 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume); 2769 2770 #ifdef CONFIG_OF 2771 static const struct of_device_id qca_bluetooth_of_match[] = { 2772 { .compatible = "qcom,qca2066-bt", .data = &qca_soc_data_qca2066}, 2773 { .compatible = "qcom,qca6174-bt" }, 2774 { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390}, 2775 { .compatible = "qcom,qca9377-bt" }, 2776 { .compatible = "qcom,wcn3950-bt", .data = &qca_soc_data_wcn3950}, 2777 { .compatible = "qcom,wcn3988-bt", .data = &qca_soc_data_wcn3988}, 2778 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990}, 2779 { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991}, 2780 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998}, 2781 { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750}, 2782 { .compatible = "qcom,wcn6855-bt", .data = &qca_soc_data_wcn6855}, 2783 { .compatible = "qcom,wcn7850-bt", .data = &qca_soc_data_wcn7850}, 2784 { /* sentinel */ } 2785 }; 2786 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match); 2787 #endif 2788 2789 #ifdef CONFIG_ACPI 2790 static const struct acpi_device_id qca_bluetooth_acpi_match[] = { 2791 { "QCOM2066", (kernel_ulong_t)&qca_soc_data_qca2066 }, 2792 { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2793 { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2794 { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2795 { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2796 { }, 2797 }; 2798 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match); 2799 #endif 2800 2801 #ifdef CONFIG_DEV_COREDUMP 2802 static void hciqca_coredump(struct device *dev) 2803 { 2804 struct serdev_device *serdev = to_serdev_device(dev); 2805 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2806 struct hci_uart *hu = &qcadev->serdev_hu; 2807 struct hci_dev *hdev = hu->hdev; 2808 2809 if (hdev->dump.coredump) 2810 hdev->dump.coredump(hdev); 2811 } 2812 #endif 2813 2814 static struct serdev_device_driver qca_serdev_driver = { 2815 .probe = qca_serdev_probe, 2816 .remove = qca_serdev_remove, 2817 .shutdown = qca_serdev_shutdown, 2818 .driver = { 2819 .name = "hci_uart_qca", 2820 .of_match_table = of_match_ptr(qca_bluetooth_of_match), 2821 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match), 2822 .pm = &qca_pm_ops, 2823 #ifdef CONFIG_DEV_COREDUMP 2824 .coredump = hciqca_coredump, 2825 #endif 2826 }, 2827 }; 2828 2829 int __init qca_init(void) 2830 { 2831 serdev_device_driver_register(&qca_serdev_driver); 2832 2833 return hci_uart_register_proto(&qca_proto); 2834 } 2835 2836 int __exit qca_deinit(void) 2837 { 2838 serdev_device_driver_unregister(&qca_serdev_driver); 2839 2840 return hci_uart_unregister_proto(&qca_proto); 2841 } 2842