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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Bluetooth Software UART Qualcomm protocol4 *5 * HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management6 * 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 written15 * 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/mod_devicetable.h>27#include <linux/module.h>28#include <linux/of.h>29#include <linux/acpi.h>30#include <linux/platform_device.h>31#include <linux/pwrseq/consumer.h>32#include <linux/regulator/consumer.h>33#include <linux/serdev.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 0xFE45#define HCI_IBS_WAKE_IND 0xFD46#define HCI_IBS_WAKE_ACK 0xFC47#define HCI_MAX_IBS_SIZE 1048 49#define IBS_WAKE_RETRANS_TIMEOUT_MS 10050#define IBS_BTSOC_TX_IDLE_TIMEOUT_MS 20051#define IBS_HOST_TX_IDLE_TIMEOUT_MS 200052#define CMD_TRANS_TIMEOUT_MS 10053#define MEMDUMP_TIMEOUT_MS 800054#define IBS_DISABLE_SSR_TIMEOUT_MS \55 (MEMDUMP_TIMEOUT_MS + FW_DOWNLOAD_TIMEOUT_MS)56#define FW_DOWNLOAD_TIMEOUT_MS 300057 58/* susclk rate */59#define SUSCLK_RATE_32KHZ 3276860 61/* Controller debug log header */62#define QCA_DEBUG_HANDLE 0x2EDC63 64/* max retry count when init fails */65#define MAX_INIT_RETRIES 366 67/* Controller dump header */68#define QCA_SSR_DUMP_HANDLE 0x010869#define QCA_DUMP_PACKET_SIZE 25570#define QCA_LAST_SEQUENCE_NUM 0xFFFF71#define QCA_CRASHBYTE_PACKET_LEN 109672#define QCA_MEMDUMP_BYTE 0xFB73 74enum qca_flags {75 QCA_IBS_DISABLED,76 QCA_DROP_VENDOR_EVENT,77 QCA_SUSPENDING,78 QCA_MEMDUMP_COLLECTION,79 QCA_HW_ERROR_EVENT,80 QCA_SSR_TRIGGERED,81 QCA_BT_OFF,82 QCA_ROM_FW,83 QCA_DEBUGFS_CREATED,84};85 86enum qca_capabilities {87 QCA_CAP_WIDEBAND_SPEECH = BIT(0),88 QCA_CAP_VALID_LE_STATES = BIT(1),89};90 91/* HCI_IBS transmit side sleep protocol states */92enum 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 */99enum rx_states {100 HCI_IBS_RX_ASLEEP,101 HCI_IBS_RX_AWAKE,102};103 104/* HCI_IBS transmit and receive side clock state vote */105enum 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 */114enum qca_memdump_states {115 QCA_MEMDUMP_IDLE,116 QCA_MEMDUMP_COLLECTING,117 QCA_MEMDUMP_COLLECTED,118 QCA_MEMDUMP_TIMEOUT,119};120 121struct qca_memdump_info {122 u32 current_seq_no;123 u32 received_dump;124 u32 ram_dump_size;125};126 127struct qca_memdump_event_hdr {128 __u8 evt;129 __u8 plen;130 __u16 opcode;131 __le16 seq_no;132 __u8 reserved;133} __packed;134 135 136struct qca_dump_size {137 __le32 dump_size;138} __packed;139 140struct 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 189enum qca_speed_type {190 QCA_INIT_SPEED = 1,191 QCA_OPER_SPEED192};193 194/*195 * Voltage regulator information required for configuring the196 * QCA Bluetooth chipset197 */198struct qca_vreg {199 const char *name;200 unsigned int load_uA;201};202 203struct 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 */213struct 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 221struct 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 const char *firmware_name;232};233 234static int qca_regulator_enable(struct qca_serdev *qcadev);235static void qca_regulator_disable(struct qca_serdev *qcadev);236static void qca_power_shutdown(struct hci_uart *hu);237static int qca_power_off(struct hci_dev *hdev);238static void qca_controller_memdump(struct work_struct *work);239static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb);240 241static 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 256static 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;262 } else {263 return NULL;264 }265}266 267static void __serial_clock_on(struct tty_struct *tty)268{269 /* TODO: Some chipset requires to enable UART clock on client270 * side to save power consumption or manual work is required.271 * Please put your code to control UART clock here if needed272 */273}274 275static void __serial_clock_off(struct tty_struct *tty)276{277 /* TODO: Some chipset requires to disable UART clock on client278 * side to save power consumption or manual work is required.279 * Please put your code to control UART clock off here if needed280 */281}282 283/* serial_clock_vote needs to be called with the ibs lock held */284static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)285{286 struct qca_data *qca = hu->priv;287 unsigned int diff;288 289 bool old_vote = (qca->tx_vote | qca->rx_vote);290 bool new_vote;291 292 switch (vote) {293 case HCI_IBS_VOTE_STATS_UPDATE:294 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);295 296 if (old_vote)297 qca->vote_off_ms += diff;298 else299 qca->vote_on_ms += diff;300 return;301 302 case HCI_IBS_TX_VOTE_CLOCK_ON:303 qca->tx_vote = true;304 qca->tx_votes_on++;305 break;306 307 case HCI_IBS_RX_VOTE_CLOCK_ON:308 qca->rx_vote = true;309 qca->rx_votes_on++;310 break;311 312 case HCI_IBS_TX_VOTE_CLOCK_OFF:313 qca->tx_vote = false;314 qca->tx_votes_off++;315 break;316 317 case HCI_IBS_RX_VOTE_CLOCK_OFF:318 qca->rx_vote = false;319 qca->rx_votes_off++;320 break;321 322 default:323 BT_ERR("Voting irregularity");324 return;325 }326 327 new_vote = qca->rx_vote | qca->tx_vote;328 329 if (new_vote != old_vote) {330 if (new_vote)331 __serial_clock_on(hu->tty);332 else333 __serial_clock_off(hu->tty);334 335 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",336 vote ? "true" : "false");337 338 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);339 340 if (new_vote) {341 qca->votes_on++;342 qca->vote_off_ms += diff;343 } else {344 qca->votes_off++;345 qca->vote_on_ms += diff;346 }347 qca->vote_last_jif = jiffies;348 }349}350 351/* Builds and sends an HCI_IBS command packet.352 * These are very simple packets with only 1 cmd byte.353 */354static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)355{356 int err = 0;357 struct sk_buff *skb = NULL;358 struct qca_data *qca = hu->priv;359 360 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);361 362 skb = bt_skb_alloc(1, GFP_ATOMIC);363 if (!skb) {364 BT_ERR("Failed to allocate memory for HCI_IBS packet");365 return -ENOMEM;366 }367 368 /* Assign HCI_IBS type */369 skb_put_u8(skb, cmd);370 371 skb_queue_tail(&qca->txq, skb);372 373 return err;374}375 376static void qca_wq_awake_device(struct work_struct *work)377{378 struct qca_data *qca = container_of(work, struct qca_data,379 ws_awake_device);380 struct hci_uart *hu = qca->hu;381 unsigned long retrans_delay;382 unsigned long flags;383 384 BT_DBG("hu %p wq awake device", hu);385 386 /* Vote for serial clock */387 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);388 389 spin_lock_irqsave(&qca->hci_ibs_lock, flags);390 391 /* Send wake indication to device */392 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)393 BT_ERR("Failed to send WAKE to device");394 395 qca->ibs_sent_wakes++;396 397 /* Start retransmit timer */398 retrans_delay = msecs_to_jiffies(qca->wake_retrans);399 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);400 401 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);402 403 /* Actually send the packets */404 hci_uart_tx_wakeup(hu);405}406 407static void qca_wq_awake_rx(struct work_struct *work)408{409 struct qca_data *qca = container_of(work, struct qca_data,410 ws_awake_rx);411 struct hci_uart *hu = qca->hu;412 unsigned long flags;413 414 BT_DBG("hu %p wq awake rx", hu);415 416 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);417 418 spin_lock_irqsave(&qca->hci_ibs_lock, flags);419 qca->rx_ibs_state = HCI_IBS_RX_AWAKE;420 421 /* Always acknowledge device wake up,422 * sending IBS message doesn't count as TX ON.423 */424 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)425 BT_ERR("Failed to acknowledge device wake up");426 427 qca->ibs_sent_wacks++;428 429 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);430 431 /* Actually send the packets */432 hci_uart_tx_wakeup(hu);433}434 435static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)436{437 struct qca_data *qca = container_of(work, struct qca_data,438 ws_rx_vote_off);439 struct hci_uart *hu = qca->hu;440 441 BT_DBG("hu %p rx clock vote off", hu);442 443 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);444}445 446static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)447{448 struct qca_data *qca = container_of(work, struct qca_data,449 ws_tx_vote_off);450 struct hci_uart *hu = qca->hu;451 452 BT_DBG("hu %p tx clock vote off", hu);453 454 /* Run HCI tx handling unlocked */455 hci_uart_tx_wakeup(hu);456 457 /* Now that message queued to tty driver, vote for tty clocks off.458 * It is up to the tty driver to pend the clocks off until tx done.459 */460 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);461}462 463static void hci_ibs_tx_idle_timeout(struct timer_list *t)464{465 struct qca_data *qca = from_timer(qca, t, tx_idle_timer);466 struct hci_uart *hu = qca->hu;467 unsigned long flags;468 469 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);470 471 spin_lock_irqsave_nested(&qca->hci_ibs_lock,472 flags, SINGLE_DEPTH_NESTING);473 474 switch (qca->tx_ibs_state) {475 case HCI_IBS_TX_AWAKE:476 /* TX_IDLE, go to SLEEP */477 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {478 BT_ERR("Failed to send SLEEP to device");479 break;480 }481 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;482 qca->ibs_sent_slps++;483 queue_work(qca->workqueue, &qca->ws_tx_vote_off);484 break;485 486 case HCI_IBS_TX_ASLEEP:487 case HCI_IBS_TX_WAKING:488 default:489 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);490 break;491 }492 493 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);494}495 496static void hci_ibs_wake_retrans_timeout(struct timer_list *t)497{498 struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);499 struct hci_uart *hu = qca->hu;500 unsigned long flags, retrans_delay;501 bool retransmit = false;502 503 BT_DBG("hu %p wake retransmit timeout in %d state",504 hu, qca->tx_ibs_state);505 506 spin_lock_irqsave_nested(&qca->hci_ibs_lock,507 flags, SINGLE_DEPTH_NESTING);508 509 /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */510 if (test_bit(QCA_SUSPENDING, &qca->flags)) {511 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);512 return;513 }514 515 switch (qca->tx_ibs_state) {516 case HCI_IBS_TX_WAKING:517 /* No WAKE_ACK, retransmit WAKE */518 retransmit = true;519 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {520 BT_ERR("Failed to acknowledge device wake up");521 break;522 }523 qca->ibs_sent_wakes++;524 retrans_delay = msecs_to_jiffies(qca->wake_retrans);525 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);526 break;527 528 case HCI_IBS_TX_ASLEEP:529 case HCI_IBS_TX_AWAKE:530 default:531 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);532 break;533 }534 535 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);536 537 if (retransmit)538 hci_uart_tx_wakeup(hu);539}540 541 542static void qca_controller_memdump_timeout(struct work_struct *work)543{544 struct qca_data *qca = container_of(work, struct qca_data,545 ctrl_memdump_timeout.work);546 struct hci_uart *hu = qca->hu;547 548 mutex_lock(&qca->hci_memdump_lock);549 if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {550 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;551 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {552 /* Inject hw error event to reset the device553 * and driver.554 */555 hci_reset_dev(hu->hdev);556 }557 }558 559 mutex_unlock(&qca->hci_memdump_lock);560}561 562 563/* Initialize protocol */564static int qca_open(struct hci_uart *hu)565{566 struct qca_serdev *qcadev;567 struct qca_data *qca;568 569 BT_DBG("hu %p qca_open", hu);570 571 if (!hci_uart_has_flow_control(hu))572 return -EOPNOTSUPP;573 574 qca = kzalloc(sizeof(*qca), GFP_KERNEL);575 if (!qca)576 return -ENOMEM;577 578 skb_queue_head_init(&qca->txq);579 skb_queue_head_init(&qca->tx_wait_q);580 skb_queue_head_init(&qca->rx_memdump_q);581 spin_lock_init(&qca->hci_ibs_lock);582 mutex_init(&qca->hci_memdump_lock);583 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);584 if (!qca->workqueue) {585 BT_ERR("QCA Workqueue not initialized properly");586 kfree(qca);587 return -ENOMEM;588 }589 590 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);591 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);592 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);593 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);594 INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump);595 INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout,596 qca_controller_memdump_timeout);597 init_waitqueue_head(&qca->suspend_wait_q);598 599 qca->hu = hu;600 init_completion(&qca->drop_ev_comp);601 602 /* Assume we start with both sides asleep -- extra wakes OK */603 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;604 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;605 606 qca->vote_last_jif = jiffies;607 608 hu->priv = qca;609 610 if (hu->serdev) {611 qcadev = serdev_device_get_drvdata(hu->serdev);612 613 switch (qcadev->btsoc_type) {614 case QCA_WCN3988:615 case QCA_WCN3990:616 case QCA_WCN3991:617 case QCA_WCN3998:618 case QCA_WCN6750:619 hu->init_speed = qcadev->init_speed;620 break;621 622 default:623 break;624 }625 626 if (qcadev->oper_speed)627 hu->oper_speed = qcadev->oper_speed;628 }629 630 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);631 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;632 633 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);634 qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS;635 636 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",637 qca->tx_idle_delay, qca->wake_retrans);638 639 return 0;640}641 642static void qca_debugfs_init(struct hci_dev *hdev)643{644 struct hci_uart *hu = hci_get_drvdata(hdev);645 struct qca_data *qca = hu->priv;646 struct dentry *ibs_dir;647 umode_t mode;648 649 if (!hdev->debugfs)650 return;651 652 if (test_and_set_bit(QCA_DEBUGFS_CREATED, &qca->flags))653 return;654 655 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);656 657 /* read only */658 mode = 0444;659 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);660 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);661 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,662 &qca->ibs_sent_slps);663 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,664 &qca->ibs_sent_wakes);665 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,666 &qca->ibs_sent_wacks);667 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,668 &qca->ibs_recv_slps);669 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,670 &qca->ibs_recv_wakes);671 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,672 &qca->ibs_recv_wacks);673 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);674 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);675 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);676 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);677 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);678 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);679 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);680 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);681 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);682 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);683 684 /* read/write */685 mode = 0644;686 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);687 debugfs_create_u32("tx_idle_delay", mode, ibs_dir,688 &qca->tx_idle_delay);689}690 691/* Flush protocol data */692static int qca_flush(struct hci_uart *hu)693{694 struct qca_data *qca = hu->priv;695 696 BT_DBG("hu %p qca flush", hu);697 698 skb_queue_purge(&qca->tx_wait_q);699 skb_queue_purge(&qca->txq);700 701 return 0;702}703 704/* Close protocol */705static int qca_close(struct hci_uart *hu)706{707 struct qca_data *qca = hu->priv;708 709 BT_DBG("hu %p qca close", hu);710 711 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);712 713 skb_queue_purge(&qca->tx_wait_q);714 skb_queue_purge(&qca->txq);715 skb_queue_purge(&qca->rx_memdump_q);716 /*717 * Shut the timers down so they can't be rearmed when718 * destroy_workqueue() drains pending work which in turn might try719 * to arm a timer. After shutdown rearm attempts are silently720 * ignored by the timer core code.721 */722 timer_shutdown_sync(&qca->tx_idle_timer);723 timer_shutdown_sync(&qca->wake_retrans_timer);724 destroy_workqueue(qca->workqueue);725 qca->hu = NULL;726 727 kfree_skb(qca->rx_skb);728 729 hu->priv = NULL;730 731 kfree(qca);732 733 return 0;734}735 736/* Called upon a wake-up-indication from the device.737 */738static void device_want_to_wakeup(struct hci_uart *hu)739{740 unsigned long flags;741 struct qca_data *qca = hu->priv;742 743 BT_DBG("hu %p want to wake up", hu);744 745 spin_lock_irqsave(&qca->hci_ibs_lock, flags);746 747 qca->ibs_recv_wakes++;748 749 /* Don't wake the rx up when suspending. */750 if (test_bit(QCA_SUSPENDING, &qca->flags)) {751 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);752 return;753 }754 755 switch (qca->rx_ibs_state) {756 case HCI_IBS_RX_ASLEEP:757 /* Make sure clock is on - we may have turned clock off since758 * receiving the wake up indicator awake rx clock.759 */760 queue_work(qca->workqueue, &qca->ws_awake_rx);761 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);762 return;763 764 case HCI_IBS_RX_AWAKE:765 /* Always acknowledge device wake up,766 * sending IBS message doesn't count as TX ON.767 */768 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {769 BT_ERR("Failed to acknowledge device wake up");770 break;771 }772 qca->ibs_sent_wacks++;773 break;774 775 default:776 /* Any other state is illegal */777 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",778 qca->rx_ibs_state);779 break;780 }781 782 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);783 784 /* Actually send the packets */785 hci_uart_tx_wakeup(hu);786}787 788/* Called upon a sleep-indication from the device.789 */790static void device_want_to_sleep(struct hci_uart *hu)791{792 unsigned long flags;793 struct qca_data *qca = hu->priv;794 795 BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state);796 797 spin_lock_irqsave(&qca->hci_ibs_lock, flags);798 799 qca->ibs_recv_slps++;800 801 switch (qca->rx_ibs_state) {802 case HCI_IBS_RX_AWAKE:803 /* Update state */804 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;805 /* Vote off rx clock under workqueue */806 queue_work(qca->workqueue, &qca->ws_rx_vote_off);807 break;808 809 case HCI_IBS_RX_ASLEEP:810 break;811 812 default:813 /* Any other state is illegal */814 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",815 qca->rx_ibs_state);816 break;817 }818 819 wake_up_interruptible(&qca->suspend_wait_q);820 821 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);822}823 824/* Called upon wake-up-acknowledgement from the device825 */826static void device_woke_up(struct hci_uart *hu)827{828 unsigned long flags, idle_delay;829 struct qca_data *qca = hu->priv;830 struct sk_buff *skb = NULL;831 832 BT_DBG("hu %p woke up", hu);833 834 spin_lock_irqsave(&qca->hci_ibs_lock, flags);835 836 qca->ibs_recv_wacks++;837 838 /* Don't react to the wake-up-acknowledgment when suspending. */839 if (test_bit(QCA_SUSPENDING, &qca->flags)) {840 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);841 return;842 }843 844 switch (qca->tx_ibs_state) {845 case HCI_IBS_TX_AWAKE:846 /* Expect one if we send 2 WAKEs */847 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",848 qca->tx_ibs_state);849 break;850 851 case HCI_IBS_TX_WAKING:852 /* Send pending packets */853 while ((skb = skb_dequeue(&qca->tx_wait_q)))854 skb_queue_tail(&qca->txq, skb);855 856 /* Switch timers and change state to HCI_IBS_TX_AWAKE */857 del_timer(&qca->wake_retrans_timer);858 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);859 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);860 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;861 break;862 863 case HCI_IBS_TX_ASLEEP:864 default:865 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",866 qca->tx_ibs_state);867 break;868 }869 870 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);871 872 /* Actually send the packets */873 hci_uart_tx_wakeup(hu);874}875 876/* Enqueue frame for transmittion (padding, crc, etc) may be called from877 * two simultaneous tasklets.878 */879static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)880{881 unsigned long flags = 0, idle_delay;882 struct qca_data *qca = hu->priv;883 884 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,885 qca->tx_ibs_state);886 887 if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {888 /* As SSR is in progress, ignore the packets */889 bt_dev_dbg(hu->hdev, "SSR is in progress");890 kfree_skb(skb);891 return 0;892 }893 894 /* Prepend skb with frame type */895 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);896 897 spin_lock_irqsave(&qca->hci_ibs_lock, flags);898 899 /* Don't go to sleep in middle of patch download or900 * Out-Of-Band(GPIOs control) sleep is selected.901 * Don't wake the device up when suspending.902 */903 if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||904 test_bit(QCA_SUSPENDING, &qca->flags)) {905 skb_queue_tail(&qca->txq, skb);906 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);907 return 0;908 }909 910 /* Act according to current state */911 switch (qca->tx_ibs_state) {912 case HCI_IBS_TX_AWAKE:913 BT_DBG("Device awake, sending normally");914 skb_queue_tail(&qca->txq, skb);915 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);916 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);917 break;918 919 case HCI_IBS_TX_ASLEEP:920 BT_DBG("Device asleep, waking up and queueing packet");921 /* Save packet for later */922 skb_queue_tail(&qca->tx_wait_q, skb);923 924 qca->tx_ibs_state = HCI_IBS_TX_WAKING;925 /* Schedule a work queue to wake up device */926 queue_work(qca->workqueue, &qca->ws_awake_device);927 break;928 929 case HCI_IBS_TX_WAKING:930 BT_DBG("Device waking up, queueing packet");931 /* Transient state; just keep packet for later */932 skb_queue_tail(&qca->tx_wait_q, skb);933 break;934 935 default:936 BT_ERR("Illegal tx state: %d (losing packet)",937 qca->tx_ibs_state);938 dev_kfree_skb_irq(skb);939 break;940 }941 942 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);943 944 return 0;945}946 947static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)948{949 struct hci_uart *hu = hci_get_drvdata(hdev);950 951 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);952 953 device_want_to_sleep(hu);954 955 kfree_skb(skb);956 return 0;957}958 959static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)960{961 struct hci_uart *hu = hci_get_drvdata(hdev);962 963 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);964 965 device_want_to_wakeup(hu);966 967 kfree_skb(skb);968 return 0;969}970 971static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)972{973 struct hci_uart *hu = hci_get_drvdata(hdev);974 975 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);976 977 device_woke_up(hu);978 979 kfree_skb(skb);980 return 0;981}982 983static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb)984{985 /* We receive debug logs from chip as an ACL packets.986 * Instead of sending the data to ACL to decode the987 * received data, we are pushing them to the above layers988 * as a diagnostic packet.989 */990 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE)991 return hci_recv_diag(hdev, skb);992 993 return hci_recv_frame(hdev, skb);994}995 996static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)997{998 struct hci_uart *hu = hci_get_drvdata(hdev);999 struct qca_data *qca = hu->priv;1000 char buf[80];1001 1002 snprintf(buf, sizeof(buf), "Controller Name: 0x%x\n",1003 qca->controller_id);1004 skb_put_data(skb, buf, strlen(buf));1005 1006 snprintf(buf, sizeof(buf), "Firmware Version: 0x%x\n",1007 qca->fw_version);1008 skb_put_data(skb, buf, strlen(buf));1009 1010 snprintf(buf, sizeof(buf), "Vendor:Qualcomm\n");1011 skb_put_data(skb, buf, strlen(buf));1012 1013 snprintf(buf, sizeof(buf), "Driver: %s\n",1014 hu->serdev->dev.driver->name);1015 skb_put_data(skb, buf, strlen(buf));1016}1017 1018static void qca_controller_memdump(struct work_struct *work)1019{1020 struct qca_data *qca = container_of(work, struct qca_data,1021 ctrl_memdump_evt);1022 struct hci_uart *hu = qca->hu;1023 struct sk_buff *skb;1024 struct qca_memdump_event_hdr *cmd_hdr;1025 struct qca_memdump_info *qca_memdump = qca->qca_memdump;1026 struct qca_dump_size *dump;1027 u16 seq_no;1028 u32 rx_size;1029 int ret = 0;1030 enum qca_btsoc_type soc_type = qca_soc_type(hu);1031 1032 while ((skb = skb_dequeue(&qca->rx_memdump_q))) {1033 1034 mutex_lock(&qca->hci_memdump_lock);1035 /* Skip processing the received packets if timeout detected1036 * or memdump collection completed.1037 */1038 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||1039 qca->memdump_state == QCA_MEMDUMP_COLLECTED) {1040 mutex_unlock(&qca->hci_memdump_lock);1041 return;1042 }1043 1044 if (!qca_memdump) {1045 qca_memdump = kzalloc(sizeof(*qca_memdump), GFP_ATOMIC);1046 if (!qca_memdump) {1047 mutex_unlock(&qca->hci_memdump_lock);1048 return;1049 }1050 1051 qca->qca_memdump = qca_memdump;1052 }1053 1054 qca->memdump_state = QCA_MEMDUMP_COLLECTING;1055 cmd_hdr = (void *) skb->data;1056 seq_no = __le16_to_cpu(cmd_hdr->seq_no);1057 skb_pull(skb, sizeof(struct qca_memdump_event_hdr));1058 1059 if (!seq_no) {1060 1061 /* This is the first frame of memdump packet from1062 * the controller, Disable IBS to recevie dump1063 * with out any interruption, ideally time required for1064 * the controller to send the dump is 8 seconds. let us1065 * start timer to handle this asynchronous activity.1066 */1067 set_bit(QCA_IBS_DISABLED, &qca->flags);1068 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);1069 dump = (void *) skb->data;1070 qca_memdump->ram_dump_size = __le32_to_cpu(dump->dump_size);1071 if (!(qca_memdump->ram_dump_size)) {1072 bt_dev_err(hu->hdev, "Rx invalid memdump size");1073 kfree(qca_memdump);1074 kfree_skb(skb);1075 mutex_unlock(&qca->hci_memdump_lock);1076 return;1077 }1078 1079 queue_delayed_work(qca->workqueue,1080 &qca->ctrl_memdump_timeout,1081 msecs_to_jiffies(MEMDUMP_TIMEOUT_MS));1082 skb_pull(skb, sizeof(qca_memdump->ram_dump_size));1083 qca_memdump->current_seq_no = 0;1084 qca_memdump->received_dump = 0;1085 ret = hci_devcd_init(hu->hdev, qca_memdump->ram_dump_size);1086 bt_dev_info(hu->hdev, "hci_devcd_init Return:%d",1087 ret);1088 if (ret < 0) {1089 kfree(qca->qca_memdump);1090 qca->qca_memdump = NULL;1091 qca->memdump_state = QCA_MEMDUMP_COLLECTED;1092 cancel_delayed_work(&qca->ctrl_memdump_timeout);1093 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);1094 clear_bit(QCA_IBS_DISABLED, &qca->flags);1095 mutex_unlock(&qca->hci_memdump_lock);1096 return;1097 }1098 1099 bt_dev_info(hu->hdev, "QCA collecting dump of size:%u",1100 qca_memdump->ram_dump_size);1101 1102 }1103 1104 /* If sequence no 0 is missed then there is no point in1105 * accepting the other sequences.1106 */1107 if (!test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {1108 bt_dev_err(hu->hdev, "QCA: Discarding other packets");1109 kfree(qca_memdump);1110 kfree_skb(skb);1111 mutex_unlock(&qca->hci_memdump_lock);1112 return;1113 }1114 /* There could be chance of missing some packets from1115 * the controller. In such cases let us store the dummy1116 * packets in the buffer.1117 */1118 /* For QCA6390, controller does not lost packets but1119 * sequence number field of packet sometimes has error1120 * bits, so skip this checking for missing packet.1121 */1122 while ((seq_no > qca_memdump->current_seq_no + 1) &&1123 (soc_type != QCA_QCA6390) &&1124 seq_no != QCA_LAST_SEQUENCE_NUM) {1125 bt_dev_err(hu->hdev, "QCA controller missed packet:%d",1126 qca_memdump->current_seq_no);1127 rx_size = qca_memdump->received_dump;1128 rx_size += QCA_DUMP_PACKET_SIZE;1129 if (rx_size > qca_memdump->ram_dump_size) {1130 bt_dev_err(hu->hdev,1131 "QCA memdump received %d, no space for missed packet",1132 qca_memdump->received_dump);1133 break;1134 }1135 hci_devcd_append_pattern(hu->hdev, 0x00,1136 QCA_DUMP_PACKET_SIZE);1137 qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE;1138 qca_memdump->current_seq_no++;1139 }1140 1141 rx_size = qca_memdump->received_dump + skb->len;1142 if (rx_size <= qca_memdump->ram_dump_size) {1143 if ((seq_no != QCA_LAST_SEQUENCE_NUM) &&1144 (seq_no != qca_memdump->current_seq_no)) {1145 bt_dev_err(hu->hdev,1146 "QCA memdump unexpected packet %d",1147 seq_no);1148 }1149 bt_dev_dbg(hu->hdev,1150 "QCA memdump packet %d with length %d",1151 seq_no, skb->len);1152 hci_devcd_append(hu->hdev, skb);1153 qca_memdump->current_seq_no += 1;1154 qca_memdump->received_dump = rx_size;1155 } else {1156 bt_dev_err(hu->hdev,1157 "QCA memdump received no space for packet %d",1158 qca_memdump->current_seq_no);1159 }1160 1161 if (seq_no == QCA_LAST_SEQUENCE_NUM) {1162 bt_dev_info(hu->hdev,1163 "QCA memdump Done, received %d, total %d",1164 qca_memdump->received_dump,1165 qca_memdump->ram_dump_size);1166 hci_devcd_complete(hu->hdev);1167 cancel_delayed_work(&qca->ctrl_memdump_timeout);1168 kfree(qca->qca_memdump);1169 qca->qca_memdump = NULL;1170 qca->memdump_state = QCA_MEMDUMP_COLLECTED;1171 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);1172 }1173 1174 mutex_unlock(&qca->hci_memdump_lock);1175 }1176 1177}1178 1179static int qca_controller_memdump_event(struct hci_dev *hdev,1180 struct sk_buff *skb)1181{1182 struct hci_uart *hu = hci_get_drvdata(hdev);1183 struct qca_data *qca = hu->priv;1184 1185 set_bit(QCA_SSR_TRIGGERED, &qca->flags);1186 skb_queue_tail(&qca->rx_memdump_q, skb);1187 queue_work(qca->workqueue, &qca->ctrl_memdump_evt);1188 1189 return 0;1190}1191 1192static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb)1193{1194 struct hci_uart *hu = hci_get_drvdata(hdev);1195 struct qca_data *qca = hu->priv;1196 1197 if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) {1198 struct hci_event_hdr *hdr = (void *)skb->data;1199 1200 /* For the WCN3990 the vendor command for a baudrate change1201 * isn't sent as synchronous HCI command, because the1202 * controller sends the corresponding vendor event with the1203 * new baudrate. The event is received and properly decoded1204 * after changing the baudrate of the host port. It needs to1205 * be dropped, otherwise it can be misinterpreted as1206 * response to a later firmware download command (also a1207 * vendor command).1208 */1209 1210 if (hdr->evt == HCI_EV_VENDOR)1211 complete(&qca->drop_ev_comp);1212 1213 kfree_skb(skb);1214 1215 return 0;1216 }1217 /* We receive chip memory dump as an event packet, With a dedicated1218 * handler followed by a hardware error event. When this event is1219 * received we store dump into a file before closing hci. This1220 * dump will help in triaging the issues.1221 */1222 if ((skb->data[0] == HCI_VENDOR_PKT) &&1223 (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE))1224 return qca_controller_memdump_event(hdev, skb);1225 1226 return hci_recv_frame(hdev, skb);1227}1228 1229#define QCA_IBS_SLEEP_IND_EVENT \1230 .type = HCI_IBS_SLEEP_IND, \1231 .hlen = 0, \1232 .loff = 0, \1233 .lsize = 0, \1234 .maxlen = HCI_MAX_IBS_SIZE1235 1236#define QCA_IBS_WAKE_IND_EVENT \1237 .type = HCI_IBS_WAKE_IND, \1238 .hlen = 0, \1239 .loff = 0, \1240 .lsize = 0, \1241 .maxlen = HCI_MAX_IBS_SIZE1242 1243#define QCA_IBS_WAKE_ACK_EVENT \1244 .type = HCI_IBS_WAKE_ACK, \1245 .hlen = 0, \1246 .loff = 0, \1247 .lsize = 0, \1248 .maxlen = HCI_MAX_IBS_SIZE1249 1250static const struct h4_recv_pkt qca_recv_pkts[] = {1251 { H4_RECV_ACL, .recv = qca_recv_acl_data },1252 { H4_RECV_SCO, .recv = hci_recv_frame },1253 { H4_RECV_EVENT, .recv = qca_recv_event },1254 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind },1255 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack },1256 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },1257};1258 1259static int qca_recv(struct hci_uart *hu, const void *data, int count)1260{1261 struct qca_data *qca = hu->priv;1262 1263 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))1264 return -EUNATCH;1265 1266 qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,1267 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));1268 if (IS_ERR(qca->rx_skb)) {1269 int err = PTR_ERR(qca->rx_skb);1270 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);1271 qca->rx_skb = NULL;1272 return err;1273 }1274 1275 return count;1276}1277 1278static struct sk_buff *qca_dequeue(struct hci_uart *hu)1279{1280 struct qca_data *qca = hu->priv;1281 1282 return skb_dequeue(&qca->txq);1283}1284 1285static uint8_t qca_get_baudrate_value(int speed)1286{1287 switch (speed) {1288 case 9600:1289 return QCA_BAUDRATE_9600;1290 case 19200:1291 return QCA_BAUDRATE_19200;1292 case 38400:1293 return QCA_BAUDRATE_38400;1294 case 57600:1295 return QCA_BAUDRATE_57600;1296 case 115200:1297 return QCA_BAUDRATE_115200;1298 case 230400:1299 return QCA_BAUDRATE_230400;1300 case 460800:1301 return QCA_BAUDRATE_460800;1302 case 500000:1303 return QCA_BAUDRATE_500000;1304 case 921600:1305 return QCA_BAUDRATE_921600;1306 case 1000000:1307 return QCA_BAUDRATE_1000000;1308 case 2000000:1309 return QCA_BAUDRATE_2000000;1310 case 3000000:1311 return QCA_BAUDRATE_3000000;1312 case 3200000:1313 return QCA_BAUDRATE_3200000;1314 case 3500000:1315 return QCA_BAUDRATE_3500000;1316 default:1317 return QCA_BAUDRATE_115200;1318 }1319}1320 1321static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)1322{1323 struct hci_uart *hu = hci_get_drvdata(hdev);1324 struct qca_data *qca = hu->priv;1325 struct sk_buff *skb;1326 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };1327 1328 if (baudrate > QCA_BAUDRATE_3200000)1329 return -EINVAL;1330 1331 cmd[4] = baudrate;1332 1333 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);1334 if (!skb) {1335 bt_dev_err(hdev, "Failed to allocate baudrate packet");1336 return -ENOMEM;1337 }1338 1339 /* Assign commands to change baudrate and packet type. */1340 skb_put_data(skb, cmd, sizeof(cmd));1341 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;1342 1343 skb_queue_tail(&qca->txq, skb);1344 hci_uart_tx_wakeup(hu);1345 1346 /* Wait for the baudrate change request to be sent */1347 1348 while (!skb_queue_empty(&qca->txq))1349 usleep_range(100, 200);1350 1351 if (hu->serdev)1352 serdev_device_wait_until_sent(hu->serdev,1353 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));1354 1355 /* Give the controller time to process the request */1356 switch (qca_soc_type(hu)) {1357 case QCA_WCN3988:1358 case QCA_WCN3990:1359 case QCA_WCN3991:1360 case QCA_WCN3998:1361 case QCA_WCN6750:1362 case QCA_WCN6855:1363 case QCA_WCN7850:1364 usleep_range(1000, 10000);1365 break;1366 1367 default:1368 msleep(300);1369 }1370 1371 return 0;1372}1373 1374static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)1375{1376 if (hu->serdev)1377 serdev_device_set_baudrate(hu->serdev, speed);1378 else1379 hci_uart_set_baudrate(hu, speed);1380}1381 1382static int qca_send_power_pulse(struct hci_uart *hu, bool on)1383{1384 int ret;1385 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);1386 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;1387 1388 /* These power pulses are single byte command which are sent1389 * at required baudrate to wcn3990. On wcn3990, we have an external1390 * circuit at Tx pin which decodes the pulse sent at specific baudrate.1391 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT1392 * and also we use the same power inputs to turn on and off for1393 * Wi-Fi/BT. Powering up the power sources will not enable BT, until1394 * we send a power on pulse at 115200 bps. This algorithm will help to1395 * save power. Disabling hardware flow control is mandatory while1396 * sending power pulses to SoC.1397 */1398 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);1399 1400 serdev_device_write_flush(hu->serdev);1401 hci_uart_set_flow_control(hu, true);1402 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));1403 if (ret < 0) {1404 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);1405 return ret;1406 }1407 1408 serdev_device_wait_until_sent(hu->serdev, timeout);1409 hci_uart_set_flow_control(hu, false);1410 1411 /* Give to controller time to boot/shutdown */1412 if (on)1413 msleep(100);1414 else1415 usleep_range(1000, 10000);1416 1417 return 0;1418}1419 1420static unsigned int qca_get_speed(struct hci_uart *hu,1421 enum qca_speed_type speed_type)1422{1423 unsigned int speed = 0;1424 1425 if (speed_type == QCA_INIT_SPEED) {1426 if (hu->init_speed)1427 speed = hu->init_speed;1428 else if (hu->proto->init_speed)1429 speed = hu->proto->init_speed;1430 } else {1431 if (hu->oper_speed)1432 speed = hu->oper_speed;1433 else if (hu->proto->oper_speed)1434 speed = hu->proto->oper_speed;1435 }1436 1437 return speed;1438}1439 1440static int qca_check_speeds(struct hci_uart *hu)1441{1442 switch (qca_soc_type(hu)) {1443 case QCA_WCN3988:1444 case QCA_WCN3990:1445 case QCA_WCN3991:1446 case QCA_WCN3998:1447 case QCA_WCN6750:1448 case QCA_WCN6855:1449 case QCA_WCN7850:1450 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&1451 !qca_get_speed(hu, QCA_OPER_SPEED))1452 return -EINVAL;1453 break;1454 1455 default:1456 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||1457 !qca_get_speed(hu, QCA_OPER_SPEED))1458 return -EINVAL;1459 }1460 1461 return 0;1462}1463 1464static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)1465{1466 unsigned int speed, qca_baudrate;1467 struct qca_data *qca = hu->priv;1468 int ret = 0;1469 1470 if (speed_type == QCA_INIT_SPEED) {1471 speed = qca_get_speed(hu, QCA_INIT_SPEED);1472 if (speed)1473 host_set_baudrate(hu, speed);1474 } else {1475 enum qca_btsoc_type soc_type = qca_soc_type(hu);1476 1477 speed = qca_get_speed(hu, QCA_OPER_SPEED);1478 if (!speed)1479 return 0;1480 1481 /* Disable flow control for wcn3990 to deassert RTS while1482 * changing the baudrate of chip and host.1483 */1484 switch (soc_type) {1485 case QCA_WCN3988:1486 case QCA_WCN3990:1487 case QCA_WCN3991:1488 case QCA_WCN3998:1489 case QCA_WCN6750:1490 case QCA_WCN6855:1491 case QCA_WCN7850:1492 hci_uart_set_flow_control(hu, true);1493 break;1494 1495 default:1496 break;1497 }1498 1499 switch (soc_type) {1500 case QCA_WCN3990:1501 reinit_completion(&qca->drop_ev_comp);1502 set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);1503 break;1504 1505 default:1506 break;1507 }1508 1509 qca_baudrate = qca_get_baudrate_value(speed);1510 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);1511 ret = qca_set_baudrate(hu->hdev, qca_baudrate);1512 if (ret)1513 goto error;1514 1515 host_set_baudrate(hu, speed);1516 1517error:1518 switch (soc_type) {1519 case QCA_WCN3988:1520 case QCA_WCN3990:1521 case QCA_WCN3991:1522 case QCA_WCN3998:1523 case QCA_WCN6750:1524 case QCA_WCN6855:1525 case QCA_WCN7850:1526 hci_uart_set_flow_control(hu, false);1527 break;1528 1529 default:1530 break;1531 }1532 1533 switch (soc_type) {1534 case QCA_WCN3990:1535 /* Wait for the controller to send the vendor event1536 * for the baudrate change command.1537 */1538 if (!wait_for_completion_timeout(&qca->drop_ev_comp,1539 msecs_to_jiffies(100))) {1540 bt_dev_err(hu->hdev,1541 "Failed to change controller baudrate\n");1542 ret = -ETIMEDOUT;1543 }1544 1545 clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);1546 break;1547 1548 default:1549 break;1550 }1551 }1552 1553 return ret;1554}1555 1556static int qca_send_crashbuffer(struct hci_uart *hu)1557{1558 struct qca_data *qca = hu->priv;1559 struct sk_buff *skb;1560 1561 skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL);1562 if (!skb) {1563 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet");1564 return -ENOMEM;1565 }1566 1567 /* We forcefully crash the controller, by sending 0xfb byte for1568 * 1024 times. We also might have chance of losing data, To be1569 * on safer side we send 1096 bytes to the SoC.1570 */1571 memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE,1572 QCA_CRASHBYTE_PACKET_LEN);1573 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;1574 bt_dev_info(hu->hdev, "crash the soc to collect controller dump");1575 skb_queue_tail(&qca->txq, skb);1576 hci_uart_tx_wakeup(hu);1577 1578 return 0;1579}1580 1581static void qca_wait_for_dump_collection(struct hci_dev *hdev)1582{1583 struct hci_uart *hu = hci_get_drvdata(hdev);1584 struct qca_data *qca = hu->priv;1585 1586 wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION,1587 TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS);1588 1589 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);1590}1591 1592static void qca_hw_error(struct hci_dev *hdev, u8 code)1593{1594 struct hci_uart *hu = hci_get_drvdata(hdev);1595 struct qca_data *qca = hu->priv;1596 1597 set_bit(QCA_SSR_TRIGGERED, &qca->flags);1598 set_bit(QCA_HW_ERROR_EVENT, &qca->flags);1599 bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state);1600 1601 if (qca->memdump_state == QCA_MEMDUMP_IDLE) {1602 /* If hardware error event received for other than QCA1603 * soc memory dump event, then we need to crash the SOC1604 * and wait here for 8 seconds to get the dump packets.1605 * This will block main thread to be on hold until we1606 * collect dump.1607 */1608 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);1609 qca_send_crashbuffer(hu);1610 qca_wait_for_dump_collection(hdev);1611 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {1612 /* Let us wait here until memory dump collected or1613 * memory dump timer expired.1614 */1615 bt_dev_info(hdev, "waiting for dump to complete");1616 qca_wait_for_dump_collection(hdev);1617 }1618 1619 mutex_lock(&qca->hci_memdump_lock);1620 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {1621 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout");1622 hci_devcd_abort(hu->hdev);1623 if (qca->qca_memdump) {1624 kfree(qca->qca_memdump);1625 qca->qca_memdump = NULL;1626 }1627 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;1628 cancel_delayed_work(&qca->ctrl_memdump_timeout);1629 }1630 mutex_unlock(&qca->hci_memdump_lock);1631 1632 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||1633 qca->memdump_state == QCA_MEMDUMP_COLLECTED) {1634 cancel_work_sync(&qca->ctrl_memdump_evt);1635 skb_queue_purge(&qca->rx_memdump_q);1636 }1637 1638 clear_bit(QCA_HW_ERROR_EVENT, &qca->flags);1639}1640 1641static void qca_cmd_timeout(struct hci_dev *hdev)1642{1643 struct hci_uart *hu = hci_get_drvdata(hdev);1644 struct qca_data *qca = hu->priv;1645 1646 set_bit(QCA_SSR_TRIGGERED, &qca->flags);1647 if (qca->memdump_state == QCA_MEMDUMP_IDLE) {1648 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);1649 qca_send_crashbuffer(hu);1650 qca_wait_for_dump_collection(hdev);1651 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {1652 /* Let us wait here until memory dump collected or1653 * memory dump timer expired.1654 */1655 bt_dev_info(hdev, "waiting for dump to complete");1656 qca_wait_for_dump_collection(hdev);1657 }1658 1659 mutex_lock(&qca->hci_memdump_lock);1660 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {1661 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;1662 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {1663 /* Inject hw error event to reset the device1664 * and driver.1665 */1666 hci_reset_dev(hu->hdev);1667 }1668 }1669 mutex_unlock(&qca->hci_memdump_lock);1670}1671 1672static bool qca_wakeup(struct hci_dev *hdev)1673{1674 struct hci_uart *hu = hci_get_drvdata(hdev);1675 bool wakeup;1676 1677 if (!hu->serdev)1678 return true;1679 1680 /* BT SoC attached through the serial bus is handled by the serdev driver.1681 * So we need to use the device handle of the serdev driver to get the1682 * status of device may wakeup.1683 */1684 wakeup = device_may_wakeup(&hu->serdev->ctrl->dev);1685 bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup);1686 1687 return wakeup;1688}1689 1690static int qca_port_reopen(struct hci_uart *hu)1691{1692 int ret;1693 1694 /* Now the device is in ready state to communicate with host.1695 * To sync host with device we need to reopen port.1696 * Without this, we will have RTS and CTS synchronization1697 * issues.1698 */1699 serdev_device_close(hu->serdev);1700 ret = serdev_device_open(hu->serdev);1701 if (ret) {1702 bt_dev_err(hu->hdev, "failed to open port");1703 return ret;1704 }1705 1706 hci_uart_set_flow_control(hu, false);1707 1708 return 0;1709}1710 1711static int qca_regulator_init(struct hci_uart *hu)1712{1713 enum qca_btsoc_type soc_type = qca_soc_type(hu);1714 struct qca_serdev *qcadev;1715 int ret;1716 bool sw_ctrl_state;1717 1718 /* Check for vregs status, may be hci down has turned1719 * off the voltage regulator.1720 */1721 qcadev = serdev_device_get_drvdata(hu->serdev);1722 1723 if (!qcadev->bt_power->vregs_on) {1724 serdev_device_close(hu->serdev);1725 ret = qca_regulator_enable(qcadev);1726 if (ret)1727 return ret;1728 1729 ret = serdev_device_open(hu->serdev);1730 if (ret) {1731 bt_dev_err(hu->hdev, "failed to open port");1732 return ret;1733 }1734 }1735 1736 switch (soc_type) {1737 case QCA_WCN3988:1738 case QCA_WCN3990:1739 case QCA_WCN3991:1740 case QCA_WCN3998:1741 /* Forcefully enable wcn399x to enter in to boot mode. */1742 host_set_baudrate(hu, 2400);1743 ret = qca_send_power_pulse(hu, false);1744 if (ret)1745 return ret;1746 break;1747 1748 default:1749 break;1750 }1751 1752 /* For wcn6750 need to enable gpio bt_en */1753 if (qcadev->bt_en) {1754 gpiod_set_value_cansleep(qcadev->bt_en, 0);1755 msleep(50);1756 gpiod_set_value_cansleep(qcadev->bt_en, 1);1757 msleep(50);1758 if (qcadev->sw_ctrl) {1759 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);1760 bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);1761 }1762 }1763 1764 qca_set_speed(hu, QCA_INIT_SPEED);1765 1766 switch (soc_type) {1767 case QCA_WCN3988:1768 case QCA_WCN3990:1769 case QCA_WCN3991:1770 case QCA_WCN3998:1771 ret = qca_send_power_pulse(hu, true);1772 if (ret)1773 return ret;1774 break;1775 1776 default:1777 break;1778 }1779 1780 return qca_port_reopen(hu);1781}1782 1783static int qca_power_on(struct hci_dev *hdev)1784{1785 struct hci_uart *hu = hci_get_drvdata(hdev);1786 enum qca_btsoc_type soc_type = qca_soc_type(hu);1787 struct qca_serdev *qcadev;1788 struct qca_data *qca = hu->priv;1789 int ret = 0;1790 1791 /* Non-serdev device usually is powered by external power1792 * and don't need additional action in driver for power on1793 */1794 if (!hu->serdev)1795 return 0;1796 1797 switch (soc_type) {1798 case QCA_WCN3988:1799 case QCA_WCN3990:1800 case QCA_WCN3991:1801 case QCA_WCN3998:1802 case QCA_WCN6750:1803 case QCA_WCN6855:1804 case QCA_WCN7850:1805 case QCA_QCA6390:1806 ret = qca_regulator_init(hu);1807 break;1808 1809 default:1810 qcadev = serdev_device_get_drvdata(hu->serdev);1811 if (qcadev->bt_en) {1812 gpiod_set_value_cansleep(qcadev->bt_en, 1);1813 /* Controller needs time to bootup. */1814 msleep(150);1815 }1816 }1817 1818 clear_bit(QCA_BT_OFF, &qca->flags);1819 return ret;1820}1821 1822static void hci_coredump_qca(struct hci_dev *hdev)1823{1824 int err;1825 static const u8 param[] = { 0x26 };1826 1827 err = __hci_cmd_send(hdev, 0xfc0c, 1, param);1828 if (err < 0)1829 bt_dev_err(hdev, "%s: trigger crash failed (%d)", __func__, err);1830}1831 1832static int qca_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)1833{1834 /* QCA uses 1 as non-HCI data path id for HFP */1835 *data_path_id = 1;1836 return 0;1837}1838 1839static int qca_configure_hfp_offload(struct hci_dev *hdev)1840{1841 bt_dev_info(hdev, "HFP non-HCI data transport is supported");1842 hdev->get_data_path_id = qca_get_data_path_id;1843 /* Do not need to send HCI_Configure_Data_Path to configure non-HCI1844 * data transport path for QCA controllers, so set below field as NULL.1845 */1846 hdev->get_codec_config_data = NULL;1847 return 0;1848}1849 1850static int qca_setup(struct hci_uart *hu)1851{1852 struct hci_dev *hdev = hu->hdev;1853 struct qca_data *qca = hu->priv;1854 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;1855 unsigned int retries = 0;1856 enum qca_btsoc_type soc_type = qca_soc_type(hu);1857 const char *firmware_name = qca_get_firmware_name(hu);1858 int ret;1859 struct qca_btsoc_version ver;1860 struct qca_serdev *qcadev;1861 const char *soc_name;1862 1863 ret = qca_check_speeds(hu);1864 if (ret)1865 return ret;1866 1867 clear_bit(QCA_ROM_FW, &qca->flags);1868 /* Patch downloading has to be done without IBS mode */1869 set_bit(QCA_IBS_DISABLED, &qca->flags);1870 1871 /* Enable controller to do both LE scan and BR/EDR inquiry1872 * simultaneously.1873 */1874 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);1875 1876 switch (soc_type) {1877 case QCA_QCA2066:1878 soc_name = "qca2066";1879 break;1880 1881 case QCA_WCN3988:1882 case QCA_WCN3990:1883 case QCA_WCN3991:1884 case QCA_WCN3998:1885 soc_name = "wcn399x";1886 break;1887 1888 case QCA_WCN6750:1889 soc_name = "wcn6750";1890 break;1891 1892 case QCA_WCN6855:1893 soc_name = "wcn6855";1894 break;1895 1896 case QCA_WCN7850:1897 soc_name = "wcn7850";1898 break;1899 1900 default:1901 soc_name = "ROME/QCA6390";1902 }1903 bt_dev_info(hdev, "setting up %s", soc_name);1904 1905 qca->memdump_state = QCA_MEMDUMP_IDLE;1906 1907retry:1908 ret = qca_power_on(hdev);1909 if (ret)1910 goto out;1911 1912 clear_bit(QCA_SSR_TRIGGERED, &qca->flags);1913 1914 switch (soc_type) {1915 case QCA_WCN3988:1916 case QCA_WCN3990:1917 case QCA_WCN3991:1918 case QCA_WCN3998:1919 case QCA_WCN6750:1920 case QCA_WCN6855:1921 case QCA_WCN7850:1922 qcadev = serdev_device_get_drvdata(hu->serdev);1923 if (qcadev->bdaddr_property_broken)1924 set_bit(HCI_QUIRK_BDADDR_PROPERTY_BROKEN, &hdev->quirks);1925 1926 hci_set_aosp_capable(hdev);1927 1928 ret = qca_read_soc_version(hdev, &ver, soc_type);1929 if (ret)1930 goto out;1931 break;1932 1933 default:1934 qca_set_speed(hu, QCA_INIT_SPEED);1935 }1936 1937 /* Setup user speed if needed */1938 speed = qca_get_speed(hu, QCA_OPER_SPEED);1939 if (speed) {1940 ret = qca_set_speed(hu, QCA_OPER_SPEED);1941 if (ret)1942 goto out;1943 1944 qca_baudrate = qca_get_baudrate_value(speed);1945 }1946 1947 switch (soc_type) {1948 case QCA_WCN3988:1949 case QCA_WCN3990:1950 case QCA_WCN3991:1951 case QCA_WCN3998:1952 case QCA_WCN6750:1953 case QCA_WCN6855:1954 case QCA_WCN7850:1955 break;1956 1957 default:1958 /* Get QCA version information */1959 ret = qca_read_soc_version(hdev, &ver, soc_type);1960 if (ret)1961 goto out;1962 }1963 1964 /* Setup patch / NVM configurations */1965 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver,1966 firmware_name);1967 if (!ret) {1968 clear_bit(QCA_IBS_DISABLED, &qca->flags);1969 qca_debugfs_init(hdev);1970 hu->hdev->hw_error = qca_hw_error;1971 hu->hdev->cmd_timeout = qca_cmd_timeout;1972 if (hu->serdev) {1973 if (device_can_wakeup(hu->serdev->ctrl->dev.parent))1974 hu->hdev->wakeup = qca_wakeup;1975 }1976 } else if (ret == -ENOENT) {1977 /* No patch/nvm-config found, run with original fw/config */1978 set_bit(QCA_ROM_FW, &qca->flags);1979 ret = 0;1980 } else if (ret == -EAGAIN) {1981 /*1982 * Userspace firmware loader will return -EAGAIN in case no1983 * patch/nvm-config is found, so run with original fw/config.1984 */1985 set_bit(QCA_ROM_FW, &qca->flags);1986 ret = 0;1987 }1988 1989out:1990 if (ret && retries < MAX_INIT_RETRIES) {1991 bt_dev_warn(hdev, "Retry BT power ON:%d", retries);1992 qca_power_shutdown(hu);1993 if (hu->serdev) {1994 serdev_device_close(hu->serdev);1995 ret = serdev_device_open(hu->serdev);1996 if (ret) {1997 bt_dev_err(hdev, "failed to open port");1998 return ret;1999 }2000 }2001 retries++;2002 goto retry;2003 }2004 2005 /* Setup bdaddr */2006 if (soc_type == QCA_ROME)2007 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;2008 else2009 hu->hdev->set_bdaddr = qca_set_bdaddr;2010 2011 if (soc_type == QCA_QCA2066)2012 qca_configure_hfp_offload(hdev);2013 2014 qca->fw_version = le16_to_cpu(ver.patch_ver);2015 qca->controller_id = le16_to_cpu(ver.rom_ver);2016 hci_devcd_register(hdev, hci_coredump_qca, qca_dmp_hdr, NULL);2017 2018 return ret;2019}2020 2021static const struct hci_uart_proto qca_proto = {2022 .id = HCI_UART_QCA,2023 .name = "QCA",2024 .manufacturer = 29,2025 .init_speed = 115200,2026 .oper_speed = 3000000,2027 .open = qca_open,2028 .close = qca_close,2029 .flush = qca_flush,2030 .setup = qca_setup,2031 .recv = qca_recv,2032 .enqueue = qca_enqueue,2033 .dequeue = qca_dequeue,2034};2035 2036static const struct qca_device_data qca_soc_data_wcn3988 __maybe_unused = {2037 .soc_type = QCA_WCN3988,2038 .vregs = (struct qca_vreg []) {2039 { "vddio", 15000 },2040 { "vddxo", 80000 },2041 { "vddrf", 300000 },2042 { "vddch0", 450000 },2043 },2044 .num_vregs = 4,2045};2046 2047static const struct qca_device_data qca_soc_data_wcn3990 __maybe_unused = {2048 .soc_type = QCA_WCN3990,2049 .vregs = (struct qca_vreg []) {2050 { "vddio", 15000 },2051 { "vddxo", 80000 },2052 { "vddrf", 300000 },2053 { "vddch0", 450000 },2054 },2055 .num_vregs = 4,2056};2057 2058static const struct qca_device_data qca_soc_data_wcn3991 __maybe_unused = {2059 .soc_type = QCA_WCN3991,2060 .vregs = (struct qca_vreg []) {2061 { "vddio", 15000 },2062 { "vddxo", 80000 },2063 { "vddrf", 300000 },2064 { "vddch0", 450000 },2065 },2066 .num_vregs = 4,2067 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,2068};2069 2070static const struct qca_device_data qca_soc_data_wcn3998 __maybe_unused = {2071 .soc_type = QCA_WCN3998,2072 .vregs = (struct qca_vreg []) {2073 { "vddio", 10000 },2074 { "vddxo", 80000 },2075 { "vddrf", 300000 },2076 { "vddch0", 450000 },2077 },2078 .num_vregs = 4,2079};2080 2081static const struct qca_device_data qca_soc_data_qca2066 __maybe_unused = {2082 .soc_type = QCA_QCA2066,2083 .num_vregs = 0,2084 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,2085};2086 2087static const struct qca_device_data qca_soc_data_qca6390 __maybe_unused = {2088 .soc_type = QCA_QCA6390,2089 .num_vregs = 0,2090};2091 2092static const struct qca_device_data qca_soc_data_wcn6750 __maybe_unused = {2093 .soc_type = QCA_WCN6750,2094 .vregs = (struct qca_vreg []) {2095 { "vddio", 5000 },2096 { "vddaon", 26000 },2097 { "vddbtcxmx", 126000 },2098 { "vddrfacmn", 12500 },2099 { "vddrfa0p8", 102000 },2100 { "vddrfa1p7", 302000 },2101 { "vddrfa1p2", 257000 },2102 { "vddrfa2p2", 1700000 },2103 { "vddasd", 200 },2104 },2105 .num_vregs = 9,2106 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,2107};2108 2109static const struct qca_device_data qca_soc_data_wcn6855 __maybe_unused = {2110 .soc_type = QCA_WCN6855,2111 .vregs = (struct qca_vreg []) {2112 { "vddio", 5000 },2113 { "vddbtcxmx", 126000 },2114 { "vddrfacmn", 12500 },2115 { "vddrfa0p8", 102000 },2116 { "vddrfa1p7", 302000 },2117 { "vddrfa1p2", 257000 },2118 },2119 .num_vregs = 6,2120 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,2121};2122 2123static const struct qca_device_data qca_soc_data_wcn7850 __maybe_unused = {2124 .soc_type = QCA_WCN7850,2125 .vregs = (struct qca_vreg []) {2126 { "vddio", 5000 },2127 { "vddaon", 26000 },2128 { "vdddig", 126000 },2129 { "vddrfa0p8", 102000 },2130 { "vddrfa1p2", 257000 },2131 { "vddrfa1p9", 302000 },2132 },2133 .num_vregs = 6,2134 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,2135};2136 2137static void qca_power_shutdown(struct hci_uart *hu)2138{2139 struct qca_serdev *qcadev;2140 struct qca_data *qca = hu->priv;2141 unsigned long flags;2142 enum qca_btsoc_type soc_type = qca_soc_type(hu);2143 bool sw_ctrl_state;2144 struct qca_power *power;2145 2146 /* From this point we go into power off state. But serial port is2147 * still open, stop queueing the IBS data and flush all the buffered2148 * data in skb's.2149 */2150 spin_lock_irqsave(&qca->hci_ibs_lock, flags);2151 set_bit(QCA_IBS_DISABLED, &qca->flags);2152 qca_flush(hu);2153 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);2154 2155 /* Non-serdev device usually is powered by external power2156 * and don't need additional action in driver for power down2157 */2158 if (!hu->serdev)2159 return;2160 2161 qcadev = serdev_device_get_drvdata(hu->serdev);2162 power = qcadev->bt_power;2163 2164 if (power && power->pwrseq) {2165 pwrseq_power_off(power->pwrseq);2166 set_bit(QCA_BT_OFF, &qca->flags);2167 return;2168 }2169 2170 switch (soc_type) {2171 case QCA_WCN3988:2172 case QCA_WCN3990:2173 case QCA_WCN3991:2174 case QCA_WCN3998:2175 host_set_baudrate(hu, 2400);2176 qca_send_power_pulse(hu, false);2177 qca_regulator_disable(qcadev);2178 break;2179 2180 case QCA_WCN6750:2181 case QCA_WCN6855:2182 gpiod_set_value_cansleep(qcadev->bt_en, 0);2183 msleep(100);2184 qca_regulator_disable(qcadev);2185 if (qcadev->sw_ctrl) {2186 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);2187 bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);2188 }2189 break;2190 2191 default:2192 gpiod_set_value_cansleep(qcadev->bt_en, 0);2193 }2194 2195 set_bit(QCA_BT_OFF, &qca->flags);2196}2197 2198static int qca_power_off(struct hci_dev *hdev)2199{2200 struct hci_uart *hu = hci_get_drvdata(hdev);2201 struct qca_data *qca = hu->priv;2202 enum qca_btsoc_type soc_type = qca_soc_type(hu);2203 2204 hu->hdev->hw_error = NULL;2205 hu->hdev->cmd_timeout = NULL;2206 2207 del_timer_sync(&qca->wake_retrans_timer);2208 del_timer_sync(&qca->tx_idle_timer);2209 2210 /* Stop sending shutdown command if soc crashes. */2211 if (soc_type != QCA_ROME2212 && qca->memdump_state == QCA_MEMDUMP_IDLE) {2213 qca_send_pre_shutdown_cmd(hdev);2214 usleep_range(8000, 10000);2215 }2216 2217 qca_power_shutdown(hu);2218 return 0;2219}2220 2221static int qca_regulator_enable(struct qca_serdev *qcadev)2222{2223 struct qca_power *power = qcadev->bt_power;2224 int ret;2225 2226 if (power->pwrseq)2227 return pwrseq_power_on(power->pwrseq);2228 2229 /* Already enabled */2230 if (power->vregs_on)2231 return 0;2232 2233 BT_DBG("enabling %d regulators)", power->num_vregs);2234 2235 ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk);2236 if (ret)2237 return ret;2238 2239 power->vregs_on = true;2240 2241 ret = clk_prepare_enable(qcadev->susclk);2242 if (ret)2243 qca_regulator_disable(qcadev);2244 2245 return ret;2246}2247 2248static void qca_regulator_disable(struct qca_serdev *qcadev)2249{2250 struct qca_power *power;2251 2252 if (!qcadev)2253 return;2254 2255 power = qcadev->bt_power;2256 2257 /* Already disabled? */2258 if (!power->vregs_on)2259 return;2260 2261 regulator_bulk_disable(power->num_vregs, power->vreg_bulk);2262 power->vregs_on = false;2263 2264 clk_disable_unprepare(qcadev->susclk);2265}2266 2267static int qca_init_regulators(struct qca_power *qca,2268 const struct qca_vreg *vregs, size_t num_vregs)2269{2270 struct regulator_bulk_data *bulk;2271 int ret;2272 int i;2273 2274 bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL);2275 if (!bulk)2276 return -ENOMEM;2277 2278 for (i = 0; i < num_vregs; i++)2279 bulk[i].supply = vregs[i].name;2280 2281 ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk);2282 if (ret < 0)2283 return ret;2284 2285 for (i = 0; i < num_vregs; i++) {2286 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA);2287 if (ret)2288 return ret;2289 }2290 2291 qca->vreg_bulk = bulk;2292 qca->num_vregs = num_vregs;2293 2294 return 0;2295}2296 2297static void qca_clk_disable_unprepare(void *data)2298{2299 struct clk *clk = data;2300 2301 clk_disable_unprepare(clk);2302}2303 2304static int qca_serdev_probe(struct serdev_device *serdev)2305{2306 struct qca_serdev *qcadev;2307 struct hci_dev *hdev;2308 const struct qca_device_data *data;2309 int err;2310 bool power_ctrl_enabled = true;2311 2312 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);2313 if (!qcadev)2314 return -ENOMEM;2315 2316 qcadev->serdev_hu.serdev = serdev;2317 data = device_get_match_data(&serdev->dev);2318 serdev_device_set_drvdata(serdev, qcadev);2319 device_property_read_string(&serdev->dev, "firmware-name",2320 &qcadev->firmware_name);2321 device_property_read_u32(&serdev->dev, "max-speed",2322 &qcadev->oper_speed);2323 if (!qcadev->oper_speed)2324 BT_DBG("UART will pick default operating speed");2325 2326 qcadev->bdaddr_property_broken = device_property_read_bool(&serdev->dev,2327 "qcom,local-bd-address-broken");2328 2329 if (data)2330 qcadev->btsoc_type = data->soc_type;2331 else2332 qcadev->btsoc_type = QCA_ROME;2333 2334 switch (qcadev->btsoc_type) {2335 case QCA_WCN3988:2336 case QCA_WCN3990:2337 case QCA_WCN3991:2338 case QCA_WCN3998:2339 case QCA_WCN6750:2340 case QCA_WCN6855:2341 case QCA_WCN7850:2342 case QCA_QCA6390:2343 qcadev->bt_power = devm_kzalloc(&serdev->dev,2344 sizeof(struct qca_power),2345 GFP_KERNEL);2346 if (!qcadev->bt_power)2347 return -ENOMEM;2348 break;2349 default:2350 break;2351 }2352 2353 switch (qcadev->btsoc_type) {2354 case QCA_WCN6855:2355 case QCA_WCN7850:2356 if (!device_property_present(&serdev->dev, "enable-gpios")) {2357 /*2358 * Backward compatibility with old DT sources. If the2359 * node doesn't have the 'enable-gpios' property then2360 * let's use the power sequencer. Otherwise, let's2361 * drive everything outselves.2362 */2363 qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev,2364 "bluetooth");2365 if (IS_ERR(qcadev->bt_power->pwrseq))2366 return PTR_ERR(qcadev->bt_power->pwrseq);2367 2368 break;2369 }2370 fallthrough;2371 case QCA_WCN3988:2372 case QCA_WCN3990:2373 case QCA_WCN3991:2374 case QCA_WCN3998:2375 case QCA_WCN6750:2376 qcadev->bt_power->dev = &serdev->dev;2377 err = qca_init_regulators(qcadev->bt_power, data->vregs,2378 data->num_vregs);2379 if (err) {2380 BT_ERR("Failed to init regulators:%d", err);2381 return err;2382 }2383 2384 qcadev->bt_power->vregs_on = false;2385 2386 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",2387 GPIOD_OUT_LOW);2388 if (IS_ERR(qcadev->bt_en) &&2389 (data->soc_type == QCA_WCN6750 ||2390 data->soc_type == QCA_WCN6855)) {2391 dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");2392 return PTR_ERR(qcadev->bt_en);2393 }2394 2395 if (!qcadev->bt_en)2396 power_ctrl_enabled = false;2397 2398 qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",2399 GPIOD_IN);2400 if (IS_ERR(qcadev->sw_ctrl) &&2401 (data->soc_type == QCA_WCN6750 ||2402 data->soc_type == QCA_WCN6855 ||2403 data->soc_type == QCA_WCN7850)) {2404 dev_err(&serdev->dev, "failed to acquire SW_CTRL gpio\n");2405 return PTR_ERR(qcadev->sw_ctrl);2406 }2407 2408 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);2409 if (IS_ERR(qcadev->susclk)) {2410 dev_err(&serdev->dev, "failed to acquire clk\n");2411 return PTR_ERR(qcadev->susclk);2412 }2413 break;2414 2415 case QCA_QCA6390:2416 if (dev_of_node(&serdev->dev)) {2417 qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev,2418 "bluetooth");2419 if (IS_ERR(qcadev->bt_power->pwrseq))2420 return PTR_ERR(qcadev->bt_power->pwrseq);2421 break;2422 }2423 fallthrough;2424 2425 default:2426 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",2427 GPIOD_OUT_LOW);2428 if (IS_ERR(qcadev->bt_en)) {2429 dev_err(&serdev->dev, "failed to acquire enable gpio\n");2430 return PTR_ERR(qcadev->bt_en);2431 }2432 2433 if (!qcadev->bt_en)2434 power_ctrl_enabled = false;2435 2436 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);2437 if (IS_ERR(qcadev->susclk)) {2438 dev_warn(&serdev->dev, "failed to acquire clk\n");2439 return PTR_ERR(qcadev->susclk);2440 }2441 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);2442 if (err)2443 return err;2444 2445 err = clk_prepare_enable(qcadev->susclk);2446 if (err)2447 return err;2448 2449 err = devm_add_action_or_reset(&serdev->dev,2450 qca_clk_disable_unprepare,2451 qcadev->susclk);2452 if (err)2453 return err;2454 2455 }2456 2457 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);2458 if (err) {2459 BT_ERR("serdev registration failed");2460 return err;2461 }2462 2463 hdev = qcadev->serdev_hu.hdev;2464 2465 if (power_ctrl_enabled) {2466 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);2467 hdev->shutdown = qca_power_off;2468 }2469 2470 if (data) {2471 /* Wideband speech support must be set per driver since it can't2472 * be queried via hci. Same with the valid le states quirk.2473 */2474 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH)2475 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,2476 &hdev->quirks);2477 2478 if (!(data->capabilities & QCA_CAP_VALID_LE_STATES))2479 set_bit(HCI_QUIRK_BROKEN_LE_STATES, &hdev->quirks);2480 }2481 2482 return 0;2483}2484 2485static void qca_serdev_remove(struct serdev_device *serdev)2486{2487 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);2488 struct qca_power *power = qcadev->bt_power;2489 2490 switch (qcadev->btsoc_type) {2491 case QCA_WCN3988:2492 case QCA_WCN3990:2493 case QCA_WCN3991:2494 case QCA_WCN3998:2495 case QCA_WCN6750:2496 case QCA_WCN6855:2497 case QCA_WCN7850:2498 if (power->vregs_on)2499 qca_power_shutdown(&qcadev->serdev_hu);2500 break;2501 default:2502 break;2503 }2504 2505 hci_uart_unregister_device(&qcadev->serdev_hu);2506}2507 2508static void qca_serdev_shutdown(struct device *dev)2509{2510 int ret;2511 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);2512 struct serdev_device *serdev = to_serdev_device(dev);2513 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);2514 struct hci_uart *hu = &qcadev->serdev_hu;2515 struct hci_dev *hdev = hu->hdev;2516 const u8 ibs_wake_cmd[] = { 0xFD };2517 const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };2518 2519 if (qcadev->btsoc_type == QCA_QCA6390) {2520 /* The purpose of sending the VSC is to reset SOC into a initial2521 * state and the state will ensure next hdev->setup() success.2522 * if HCI_QUIRK_NON_PERSISTENT_SETUP is set, it means that2523 * hdev->setup() can do its job regardless of SoC state, so2524 * don't need to send the VSC.2525 * if HCI_SETUP is set, it means that hdev->setup() was never2526 * invoked and the SOC is already in the initial state, so2527 * don't also need to send the VSC.2528 */2529 if (test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks) ||2530 hci_dev_test_flag(hdev, HCI_SETUP))2531 return;2532 2533 /* The serdev must be in open state when conrol logic arrives2534 * here, so also fix the use-after-free issue caused by that2535 * the serdev is flushed or wrote after it is closed.2536 */2537 serdev_device_write_flush(serdev);2538 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,2539 sizeof(ibs_wake_cmd));2540 if (ret < 0) {2541 BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);2542 return;2543 }2544 serdev_device_wait_until_sent(serdev, timeout);2545 usleep_range(8000, 10000);2546 2547 serdev_device_write_flush(serdev);2548 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd,2549 sizeof(edl_reset_soc_cmd));2550 if (ret < 0) {2551 BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);2552 return;2553 }2554 serdev_device_wait_until_sent(serdev, timeout);2555 usleep_range(8000, 10000);2556 }2557}2558 2559static int __maybe_unused qca_suspend(struct device *dev)2560{2561 struct serdev_device *serdev = to_serdev_device(dev);2562 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);2563 struct hci_uart *hu = &qcadev->serdev_hu;2564 struct qca_data *qca = hu->priv;2565 unsigned long flags;2566 bool tx_pending = false;2567 int ret = 0;2568 u8 cmd;2569 u32 wait_timeout = 0;2570 2571 set_bit(QCA_SUSPENDING, &qca->flags);2572 2573 /* if BT SoC is running with default firmware then it does not2574 * support in-band sleep2575 */2576 if (test_bit(QCA_ROM_FW, &qca->flags))2577 return 0;2578 2579 /* During SSR after memory dump collection, controller will be2580 * powered off and then powered on.If controller is powered off2581 * during SSR then we should wait until SSR is completed.2582 */2583 if (test_bit(QCA_BT_OFF, &qca->flags) &&2584 !test_bit(QCA_SSR_TRIGGERED, &qca->flags))2585 return 0;2586 2587 if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||2588 test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {2589 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ?2590 IBS_DISABLE_SSR_TIMEOUT_MS :2591 FW_DOWNLOAD_TIMEOUT_MS;2592 2593 /* QCA_IBS_DISABLED flag is set to true, During FW download2594 * and during memory dump collection. It is reset to false,2595 * After FW download complete.2596 */2597 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED,2598 TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout));2599 2600 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) {2601 bt_dev_err(hu->hdev, "SSR or FW download time out");2602 ret = -ETIMEDOUT;2603 goto error;2604 }2605 }2606 2607 cancel_work_sync(&qca->ws_awake_device);2608 cancel_work_sync(&qca->ws_awake_rx);2609 2610 spin_lock_irqsave_nested(&qca->hci_ibs_lock,2611 flags, SINGLE_DEPTH_NESTING);2612 2613 switch (qca->tx_ibs_state) {2614 case HCI_IBS_TX_WAKING:2615 del_timer(&qca->wake_retrans_timer);2616 fallthrough;2617 case HCI_IBS_TX_AWAKE:2618 del_timer(&qca->tx_idle_timer);2619 2620 serdev_device_write_flush(hu->serdev);2621 cmd = HCI_IBS_SLEEP_IND;2622 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));2623 2624 if (ret < 0) {2625 BT_ERR("Failed to send SLEEP to device");2626 break;2627 }2628 2629 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;2630 qca->ibs_sent_slps++;2631 tx_pending = true;2632 break;2633 2634 case HCI_IBS_TX_ASLEEP:2635 break;2636 2637 default:2638 BT_ERR("Spurious tx state %d", qca->tx_ibs_state);2639 ret = -EINVAL;2640 break;2641 }2642 2643 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);2644 2645 if (ret < 0)2646 goto error;2647 2648 if (tx_pending) {2649 serdev_device_wait_until_sent(hu->serdev,2650 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));2651 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);2652 }2653 2654 /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going2655 * to sleep, so that the packet does not wake the system later.2656 */2657 ret = wait_event_interruptible_timeout(qca->suspend_wait_q,2658 qca->rx_ibs_state == HCI_IBS_RX_ASLEEP,2659 msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS));2660 if (ret == 0) {2661 ret = -ETIMEDOUT;2662 goto error;2663 }2664 2665 return 0;2666 2667error:2668 clear_bit(QCA_SUSPENDING, &qca->flags);2669 2670 return ret;2671}2672 2673static int __maybe_unused qca_resume(struct device *dev)2674{2675 struct serdev_device *serdev = to_serdev_device(dev);2676 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);2677 struct hci_uart *hu = &qcadev->serdev_hu;2678 struct qca_data *qca = hu->priv;2679 2680 clear_bit(QCA_SUSPENDING, &qca->flags);2681 2682 return 0;2683}2684 2685static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume);2686 2687#ifdef CONFIG_OF2688static const struct of_device_id qca_bluetooth_of_match[] = {2689 { .compatible = "qcom,qca2066-bt", .data = &qca_soc_data_qca2066},2690 { .compatible = "qcom,qca6174-bt" },2691 { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},2692 { .compatible = "qcom,qca9377-bt" },2693 { .compatible = "qcom,wcn3988-bt", .data = &qca_soc_data_wcn3988},2694 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},2695 { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},2696 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},2697 { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750},2698 { .compatible = "qcom,wcn6855-bt", .data = &qca_soc_data_wcn6855},2699 { .compatible = "qcom,wcn7850-bt", .data = &qca_soc_data_wcn7850},2700 { /* sentinel */ }2701};2702MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);2703#endif2704 2705#ifdef CONFIG_ACPI2706static const struct acpi_device_id qca_bluetooth_acpi_match[] = {2707 { "QCOM2066", (kernel_ulong_t)&qca_soc_data_qca2066 },2708 { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 },2709 { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 },2710 { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 },2711 { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 },2712 { },2713};2714MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match);2715#endif2716 2717#ifdef CONFIG_DEV_COREDUMP2718static void hciqca_coredump(struct device *dev)2719{2720 struct serdev_device *serdev = to_serdev_device(dev);2721 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);2722 struct hci_uart *hu = &qcadev->serdev_hu;2723 struct hci_dev *hdev = hu->hdev;2724 2725 if (hdev->dump.coredump)2726 hdev->dump.coredump(hdev);2727}2728#endif2729 2730static struct serdev_device_driver qca_serdev_driver = {2731 .probe = qca_serdev_probe,2732 .remove = qca_serdev_remove,2733 .driver = {2734 .name = "hci_uart_qca",2735 .of_match_table = of_match_ptr(qca_bluetooth_of_match),2736 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),2737 .shutdown = qca_serdev_shutdown,2738 .pm = &qca_pm_ops,2739#ifdef CONFIG_DEV_COREDUMP2740 .coredump = hciqca_coredump,2741#endif2742 },2743};2744 2745int __init qca_init(void)2746{2747 serdev_device_driver_register(&qca_serdev_driver);2748 2749 return hci_uart_register_proto(&qca_proto);2750}2751 2752int __exit qca_deinit(void)2753{2754 serdev_device_driver_unregister(&qca_serdev_driver);2755 2756 return hci_uart_unregister_proto(&qca_proto);2757}2758