1 // SPDX-License-Identifier: GPL-2.0-only
3 * Bluetooth Software UART Qualcomm protocol
5 * HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management
6 * protocol extension to H4.
8 * Copyright (C) 2007 Texas Instruments, Inc.
9 * Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved.
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.
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_device.h>
29 #include <linux/acpi.h>
30 #include <linux/platform_device.h>
31 #include <linux/regulator/consumer.h>
32 #include <linux/serdev.h>
33 #include <linux/mutex.h>
34 #include <asm/unaligned.h>
36 #include <net/bluetooth/bluetooth.h>
37 #include <net/bluetooth/hci_core.h>
42 /* HCI_IBS protocol messages */
43 #define HCI_IBS_SLEEP_IND 0xFE
44 #define HCI_IBS_WAKE_IND 0xFD
45 #define HCI_IBS_WAKE_ACK 0xFC
46 #define HCI_MAX_IBS_SIZE 10
48 #define IBS_WAKE_RETRANS_TIMEOUT_MS 100
49 #define IBS_BTSOC_TX_IDLE_TIMEOUT_MS 200
50 #define IBS_HOST_TX_IDLE_TIMEOUT_MS 2000
51 #define CMD_TRANS_TIMEOUT_MS 100
52 #define MEMDUMP_TIMEOUT_MS 8000
53 #define IBS_DISABLE_SSR_TIMEOUT_MS \
54 (MEMDUMP_TIMEOUT_MS + FW_DOWNLOAD_TIMEOUT_MS)
55 #define FW_DOWNLOAD_TIMEOUT_MS 3000
58 #define SUSCLK_RATE_32KHZ 32768
60 /* Controller debug log header */
61 #define QCA_DEBUG_HANDLE 0x2EDC
63 /* max retry count when init fails */
64 #define MAX_INIT_RETRIES 3
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
75 QCA_DROP_VENDOR_EVENT,
77 QCA_MEMDUMP_COLLECTION,
84 enum qca_capabilities {
85 QCA_CAP_WIDEBAND_SPEECH = BIT(0),
86 QCA_CAP_VALID_LE_STATES = BIT(1),
89 /* HCI_IBS transmit side sleep protocol states */
96 /* HCI_IBS receive side sleep protocol states */
102 /* HCI_IBS transmit and receive side clock state vote */
103 enum hci_ibs_clock_state_vote {
104 HCI_IBS_VOTE_STATS_UPDATE,
105 HCI_IBS_TX_VOTE_CLOCK_ON,
106 HCI_IBS_TX_VOTE_CLOCK_OFF,
107 HCI_IBS_RX_VOTE_CLOCK_ON,
108 HCI_IBS_RX_VOTE_CLOCK_OFF,
111 /* Controller memory dump states */
112 enum qca_memdump_states {
114 QCA_MEMDUMP_COLLECTING,
115 QCA_MEMDUMP_COLLECTED,
119 struct qca_memdump_data {
120 char *memdump_buf_head;
121 char *memdump_buf_tail;
127 struct qca_memdump_event_hdr {
136 struct qca_dump_size {
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;
153 struct timer_list wake_retrans_timer;
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_data *qca_memdump;
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;
169 /* For debugging purpose */
187 enum qca_speed_type {
193 * Voltage regulator information required for configuring the
194 * QCA Bluetooth chipset
198 unsigned int load_uA;
201 struct qca_device_data {
202 enum qca_btsoc_type soc_type;
203 struct qca_vreg *vregs;
205 uint32_t capabilities;
209 * Platform data for the QCA Bluetooth power driver.
213 struct regulator_bulk_data *vreg_bulk;
219 struct hci_uart serdev_hu;
220 struct gpio_desc *bt_en;
221 struct gpio_desc *sw_ctrl;
223 enum qca_btsoc_type btsoc_type;
224 struct qca_power *bt_power;
227 const char *firmware_name;
230 static int qca_regulator_enable(struct qca_serdev *qcadev);
231 static void qca_regulator_disable(struct qca_serdev *qcadev);
232 static void qca_power_shutdown(struct hci_uart *hu);
233 static int qca_power_off(struct hci_dev *hdev);
234 static void qca_controller_memdump(struct work_struct *work);
236 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
238 enum qca_btsoc_type soc_type;
241 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
243 soc_type = qsd->btsoc_type;
251 static const char *qca_get_firmware_name(struct hci_uart *hu)
254 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
256 return qsd->firmware_name;
262 static void __serial_clock_on(struct tty_struct *tty)
264 /* TODO: Some chipset requires to enable UART clock on client
265 * side to save power consumption or manual work is required.
266 * Please put your code to control UART clock here if needed
270 static void __serial_clock_off(struct tty_struct *tty)
272 /* TODO: Some chipset requires to disable UART clock on client
273 * side to save power consumption or manual work is required.
274 * Please put your code to control UART clock off here if needed
278 /* serial_clock_vote needs to be called with the ibs lock held */
279 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
281 struct qca_data *qca = hu->priv;
284 bool old_vote = (qca->tx_vote | qca->rx_vote);
288 case HCI_IBS_VOTE_STATS_UPDATE:
289 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
292 qca->vote_off_ms += diff;
294 qca->vote_on_ms += diff;
297 case HCI_IBS_TX_VOTE_CLOCK_ON:
302 case HCI_IBS_RX_VOTE_CLOCK_ON:
307 case HCI_IBS_TX_VOTE_CLOCK_OFF:
308 qca->tx_vote = false;
312 case HCI_IBS_RX_VOTE_CLOCK_OFF:
313 qca->rx_vote = false;
318 BT_ERR("Voting irregularity");
322 new_vote = qca->rx_vote | qca->tx_vote;
324 if (new_vote != old_vote) {
326 __serial_clock_on(hu->tty);
328 __serial_clock_off(hu->tty);
330 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
331 vote ? "true" : "false");
333 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
337 qca->vote_off_ms += diff;
340 qca->vote_on_ms += diff;
342 qca->vote_last_jif = jiffies;
346 /* Builds and sends an HCI_IBS command packet.
347 * These are very simple packets with only 1 cmd byte.
349 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
352 struct sk_buff *skb = NULL;
353 struct qca_data *qca = hu->priv;
355 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
357 skb = bt_skb_alloc(1, GFP_ATOMIC);
359 BT_ERR("Failed to allocate memory for HCI_IBS packet");
363 /* Assign HCI_IBS type */
364 skb_put_u8(skb, cmd);
366 skb_queue_tail(&qca->txq, skb);
371 static void qca_wq_awake_device(struct work_struct *work)
373 struct qca_data *qca = container_of(work, struct qca_data,
375 struct hci_uart *hu = qca->hu;
376 unsigned long retrans_delay;
379 BT_DBG("hu %p wq awake device", hu);
381 /* Vote for serial clock */
382 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
384 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
386 /* Send wake indication to device */
387 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
388 BT_ERR("Failed to send WAKE to device");
390 qca->ibs_sent_wakes++;
392 /* Start retransmit timer */
393 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
394 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
396 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
398 /* Actually send the packets */
399 hci_uart_tx_wakeup(hu);
402 static void qca_wq_awake_rx(struct work_struct *work)
404 struct qca_data *qca = container_of(work, struct qca_data,
406 struct hci_uart *hu = qca->hu;
409 BT_DBG("hu %p wq awake rx", hu);
411 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
413 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
414 qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
416 /* Always acknowledge device wake up,
417 * sending IBS message doesn't count as TX ON.
419 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
420 BT_ERR("Failed to acknowledge device wake up");
422 qca->ibs_sent_wacks++;
424 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
426 /* Actually send the packets */
427 hci_uart_tx_wakeup(hu);
430 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
432 struct qca_data *qca = container_of(work, struct qca_data,
434 struct hci_uart *hu = qca->hu;
436 BT_DBG("hu %p rx clock vote off", hu);
438 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
441 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
443 struct qca_data *qca = container_of(work, struct qca_data,
445 struct hci_uart *hu = qca->hu;
447 BT_DBG("hu %p tx clock vote off", hu);
449 /* Run HCI tx handling unlocked */
450 hci_uart_tx_wakeup(hu);
452 /* Now that message queued to tty driver, vote for tty clocks off.
453 * It is up to the tty driver to pend the clocks off until tx done.
455 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
458 static void hci_ibs_tx_idle_timeout(struct timer_list *t)
460 struct qca_data *qca = from_timer(qca, t, tx_idle_timer);
461 struct hci_uart *hu = qca->hu;
464 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
466 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
467 flags, SINGLE_DEPTH_NESTING);
469 switch (qca->tx_ibs_state) {
470 case HCI_IBS_TX_AWAKE:
471 /* TX_IDLE, go to SLEEP */
472 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
473 BT_ERR("Failed to send SLEEP to device");
476 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
477 qca->ibs_sent_slps++;
478 queue_work(qca->workqueue, &qca->ws_tx_vote_off);
481 case HCI_IBS_TX_ASLEEP:
482 case HCI_IBS_TX_WAKING:
484 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
488 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
491 static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
493 struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);
494 struct hci_uart *hu = qca->hu;
495 unsigned long flags, retrans_delay;
496 bool retransmit = false;
498 BT_DBG("hu %p wake retransmit timeout in %d state",
499 hu, qca->tx_ibs_state);
501 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
502 flags, SINGLE_DEPTH_NESTING);
504 /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */
505 if (test_bit(QCA_SUSPENDING, &qca->flags)) {
506 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
510 switch (qca->tx_ibs_state) {
511 case HCI_IBS_TX_WAKING:
512 /* No WAKE_ACK, retransmit WAKE */
514 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
515 BT_ERR("Failed to acknowledge device wake up");
518 qca->ibs_sent_wakes++;
519 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
520 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
523 case HCI_IBS_TX_ASLEEP:
524 case HCI_IBS_TX_AWAKE:
526 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
530 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
533 hci_uart_tx_wakeup(hu);
537 static void qca_controller_memdump_timeout(struct work_struct *work)
539 struct qca_data *qca = container_of(work, struct qca_data,
540 ctrl_memdump_timeout.work);
541 struct hci_uart *hu = qca->hu;
543 mutex_lock(&qca->hci_memdump_lock);
544 if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {
545 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
546 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
547 /* Inject hw error event to reset the device
550 hci_reset_dev(hu->hdev);
554 mutex_unlock(&qca->hci_memdump_lock);
558 /* Initialize protocol */
559 static int qca_open(struct hci_uart *hu)
561 struct qca_serdev *qcadev;
562 struct qca_data *qca;
564 BT_DBG("hu %p qca_open", hu);
566 if (!hci_uart_has_flow_control(hu))
569 qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL);
573 skb_queue_head_init(&qca->txq);
574 skb_queue_head_init(&qca->tx_wait_q);
575 skb_queue_head_init(&qca->rx_memdump_q);
576 spin_lock_init(&qca->hci_ibs_lock);
577 mutex_init(&qca->hci_memdump_lock);
578 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);
579 if (!qca->workqueue) {
580 BT_ERR("QCA Workqueue not initialized properly");
585 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
586 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
587 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
588 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
589 INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump);
590 INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout,
591 qca_controller_memdump_timeout);
592 init_waitqueue_head(&qca->suspend_wait_q);
595 init_completion(&qca->drop_ev_comp);
597 /* Assume we start with both sides asleep -- extra wakes OK */
598 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
599 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
601 qca->vote_last_jif = jiffies;
606 qcadev = serdev_device_get_drvdata(hu->serdev);
608 if (qca_is_wcn399x(qcadev->btsoc_type) ||
609 qca_is_wcn6750(qcadev->btsoc_type))
610 hu->init_speed = qcadev->init_speed;
612 if (qcadev->oper_speed)
613 hu->oper_speed = qcadev->oper_speed;
616 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
617 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
619 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
620 qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS;
622 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
623 qca->tx_idle_delay, qca->wake_retrans);
628 static void qca_debugfs_init(struct hci_dev *hdev)
630 struct hci_uart *hu = hci_get_drvdata(hdev);
631 struct qca_data *qca = hu->priv;
632 struct dentry *ibs_dir;
638 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
642 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
643 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
644 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
645 &qca->ibs_sent_slps);
646 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
647 &qca->ibs_sent_wakes);
648 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
649 &qca->ibs_sent_wacks);
650 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
651 &qca->ibs_recv_slps);
652 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
653 &qca->ibs_recv_wakes);
654 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
655 &qca->ibs_recv_wacks);
656 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
657 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
658 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
659 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
660 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
661 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
662 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
663 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
664 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
665 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
669 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
670 debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
671 &qca->tx_idle_delay);
674 /* Flush protocol data */
675 static int qca_flush(struct hci_uart *hu)
677 struct qca_data *qca = hu->priv;
679 BT_DBG("hu %p qca flush", hu);
681 skb_queue_purge(&qca->tx_wait_q);
682 skb_queue_purge(&qca->txq);
688 static int qca_close(struct hci_uart *hu)
690 struct qca_data *qca = hu->priv;
692 BT_DBG("hu %p qca close", hu);
694 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
696 skb_queue_purge(&qca->tx_wait_q);
697 skb_queue_purge(&qca->txq);
698 skb_queue_purge(&qca->rx_memdump_q);
700 * Shut the timers down so they can't be rearmed when
701 * destroy_workqueue() drains pending work which in turn might try
702 * to arm a timer. After shutdown rearm attempts are silently
703 * ignored by the timer core code.
705 timer_shutdown_sync(&qca->tx_idle_timer);
706 timer_shutdown_sync(&qca->wake_retrans_timer);
707 destroy_workqueue(qca->workqueue);
710 kfree_skb(qca->rx_skb);
719 /* Called upon a wake-up-indication from the device.
721 static void device_want_to_wakeup(struct hci_uart *hu)
724 struct qca_data *qca = hu->priv;
726 BT_DBG("hu %p want to wake up", hu);
728 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
730 qca->ibs_recv_wakes++;
732 /* Don't wake the rx up when suspending. */
733 if (test_bit(QCA_SUSPENDING, &qca->flags)) {
734 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
738 switch (qca->rx_ibs_state) {
739 case HCI_IBS_RX_ASLEEP:
740 /* Make sure clock is on - we may have turned clock off since
741 * receiving the wake up indicator awake rx clock.
743 queue_work(qca->workqueue, &qca->ws_awake_rx);
744 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
747 case HCI_IBS_RX_AWAKE:
748 /* Always acknowledge device wake up,
749 * sending IBS message doesn't count as TX ON.
751 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
752 BT_ERR("Failed to acknowledge device wake up");
755 qca->ibs_sent_wacks++;
759 /* Any other state is illegal */
760 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
765 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
767 /* Actually send the packets */
768 hci_uart_tx_wakeup(hu);
771 /* Called upon a sleep-indication from the device.
773 static void device_want_to_sleep(struct hci_uart *hu)
776 struct qca_data *qca = hu->priv;
778 BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state);
780 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
782 qca->ibs_recv_slps++;
784 switch (qca->rx_ibs_state) {
785 case HCI_IBS_RX_AWAKE:
787 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
788 /* Vote off rx clock under workqueue */
789 queue_work(qca->workqueue, &qca->ws_rx_vote_off);
792 case HCI_IBS_RX_ASLEEP:
796 /* Any other state is illegal */
797 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
802 wake_up_interruptible(&qca->suspend_wait_q);
804 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
807 /* Called upon wake-up-acknowledgement from the device
809 static void device_woke_up(struct hci_uart *hu)
811 unsigned long flags, idle_delay;
812 struct qca_data *qca = hu->priv;
813 struct sk_buff *skb = NULL;
815 BT_DBG("hu %p woke up", hu);
817 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
819 qca->ibs_recv_wacks++;
821 /* Don't react to the wake-up-acknowledgment when suspending. */
822 if (test_bit(QCA_SUSPENDING, &qca->flags)) {
823 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
827 switch (qca->tx_ibs_state) {
828 case HCI_IBS_TX_AWAKE:
829 /* Expect one if we send 2 WAKEs */
830 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
834 case HCI_IBS_TX_WAKING:
835 /* Send pending packets */
836 while ((skb = skb_dequeue(&qca->tx_wait_q)))
837 skb_queue_tail(&qca->txq, skb);
839 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
840 del_timer(&qca->wake_retrans_timer);
841 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
842 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
843 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
846 case HCI_IBS_TX_ASLEEP:
848 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
853 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
855 /* Actually send the packets */
856 hci_uart_tx_wakeup(hu);
859 /* Enqueue frame for transmittion (padding, crc, etc) may be called from
860 * two simultaneous tasklets.
862 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
864 unsigned long flags = 0, idle_delay;
865 struct qca_data *qca = hu->priv;
867 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
870 if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
871 /* As SSR is in progress, ignore the packets */
872 bt_dev_dbg(hu->hdev, "SSR is in progress");
877 /* Prepend skb with frame type */
878 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
880 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
882 /* Don't go to sleep in middle of patch download or
883 * Out-Of-Band(GPIOs control) sleep is selected.
884 * Don't wake the device up when suspending.
886 if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
887 test_bit(QCA_SUSPENDING, &qca->flags)) {
888 skb_queue_tail(&qca->txq, skb);
889 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
893 /* Act according to current state */
894 switch (qca->tx_ibs_state) {
895 case HCI_IBS_TX_AWAKE:
896 BT_DBG("Device awake, sending normally");
897 skb_queue_tail(&qca->txq, skb);
898 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
899 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
902 case HCI_IBS_TX_ASLEEP:
903 BT_DBG("Device asleep, waking up and queueing packet");
904 /* Save packet for later */
905 skb_queue_tail(&qca->tx_wait_q, skb);
907 qca->tx_ibs_state = HCI_IBS_TX_WAKING;
908 /* Schedule a work queue to wake up device */
909 queue_work(qca->workqueue, &qca->ws_awake_device);
912 case HCI_IBS_TX_WAKING:
913 BT_DBG("Device waking up, queueing packet");
914 /* Transient state; just keep packet for later */
915 skb_queue_tail(&qca->tx_wait_q, skb);
919 BT_ERR("Illegal tx state: %d (losing packet)",
921 dev_kfree_skb_irq(skb);
925 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
930 static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
932 struct hci_uart *hu = hci_get_drvdata(hdev);
934 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
936 device_want_to_sleep(hu);
942 static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
944 struct hci_uart *hu = hci_get_drvdata(hdev);
946 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
948 device_want_to_wakeup(hu);
954 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
956 struct hci_uart *hu = hci_get_drvdata(hdev);
958 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
966 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb)
968 /* We receive debug logs from chip as an ACL packets.
969 * Instead of sending the data to ACL to decode the
970 * received data, we are pushing them to the above layers
971 * as a diagnostic packet.
973 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE)
974 return hci_recv_diag(hdev, skb);
976 return hci_recv_frame(hdev, skb);
979 static void qca_controller_memdump(struct work_struct *work)
981 struct qca_data *qca = container_of(work, struct qca_data,
983 struct hci_uart *hu = qca->hu;
985 struct qca_memdump_event_hdr *cmd_hdr;
986 struct qca_memdump_data *qca_memdump = qca->qca_memdump;
987 struct qca_dump_size *dump;
989 char nullBuff[QCA_DUMP_PACKET_SIZE] = { 0 };
993 enum qca_btsoc_type soc_type = qca_soc_type(hu);
995 while ((skb = skb_dequeue(&qca->rx_memdump_q))) {
997 mutex_lock(&qca->hci_memdump_lock);
998 /* Skip processing the received packets if timeout detected
999 * or memdump collection completed.
1001 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1002 qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1003 mutex_unlock(&qca->hci_memdump_lock);
1008 qca_memdump = kzalloc(sizeof(struct qca_memdump_data),
1011 mutex_unlock(&qca->hci_memdump_lock);
1015 qca->qca_memdump = qca_memdump;
1018 qca->memdump_state = QCA_MEMDUMP_COLLECTING;
1019 cmd_hdr = (void *) skb->data;
1020 seq_no = __le16_to_cpu(cmd_hdr->seq_no);
1021 skb_pull(skb, sizeof(struct qca_memdump_event_hdr));
1025 /* This is the first frame of memdump packet from
1026 * the controller, Disable IBS to recevie dump
1027 * with out any interruption, ideally time required for
1028 * the controller to send the dump is 8 seconds. let us
1029 * start timer to handle this asynchronous activity.
1031 set_bit(QCA_IBS_DISABLED, &qca->flags);
1032 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1033 dump = (void *) skb->data;
1034 dump_size = __le32_to_cpu(dump->dump_size);
1036 bt_dev_err(hu->hdev, "Rx invalid memdump size");
1039 qca->qca_memdump = NULL;
1040 mutex_unlock(&qca->hci_memdump_lock);
1044 bt_dev_info(hu->hdev, "QCA collecting dump of size:%u",
1046 queue_delayed_work(qca->workqueue,
1047 &qca->ctrl_memdump_timeout,
1048 msecs_to_jiffies(MEMDUMP_TIMEOUT_MS)
1051 skb_pull(skb, sizeof(dump_size));
1052 memdump_buf = vmalloc(dump_size);
1053 qca_memdump->ram_dump_size = dump_size;
1054 qca_memdump->memdump_buf_head = memdump_buf;
1055 qca_memdump->memdump_buf_tail = memdump_buf;
1058 memdump_buf = qca_memdump->memdump_buf_tail;
1060 /* If sequence no 0 is missed then there is no point in
1061 * accepting the other sequences.
1064 bt_dev_err(hu->hdev, "QCA: Discarding other packets");
1067 qca->qca_memdump = NULL;
1068 mutex_unlock(&qca->hci_memdump_lock);
1072 /* There could be chance of missing some packets from
1073 * the controller. In such cases let us store the dummy
1074 * packets in the buffer.
1076 /* For QCA6390, controller does not lost packets but
1077 * sequence number field of packet sometimes has error
1078 * bits, so skip this checking for missing packet.
1080 while ((seq_no > qca_memdump->current_seq_no + 1) &&
1081 (soc_type != QCA_QCA6390) &&
1082 seq_no != QCA_LAST_SEQUENCE_NUM) {
1083 bt_dev_err(hu->hdev, "QCA controller missed packet:%d",
1084 qca_memdump->current_seq_no);
1085 rx_size = qca_memdump->received_dump;
1086 rx_size += QCA_DUMP_PACKET_SIZE;
1087 if (rx_size > qca_memdump->ram_dump_size) {
1088 bt_dev_err(hu->hdev,
1089 "QCA memdump received %d, no space for missed packet",
1090 qca_memdump->received_dump);
1093 memcpy(memdump_buf, nullBuff, QCA_DUMP_PACKET_SIZE);
1094 memdump_buf = memdump_buf + QCA_DUMP_PACKET_SIZE;
1095 qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE;
1096 qca_memdump->current_seq_no++;
1099 rx_size = qca_memdump->received_dump + skb->len;
1100 if (rx_size <= qca_memdump->ram_dump_size) {
1101 if ((seq_no != QCA_LAST_SEQUENCE_NUM) &&
1102 (seq_no != qca_memdump->current_seq_no))
1103 bt_dev_err(hu->hdev,
1104 "QCA memdump unexpected packet %d",
1106 bt_dev_dbg(hu->hdev,
1107 "QCA memdump packet %d with length %d",
1109 memcpy(memdump_buf, (unsigned char *)skb->data,
1111 memdump_buf = memdump_buf + skb->len;
1112 qca_memdump->memdump_buf_tail = memdump_buf;
1113 qca_memdump->current_seq_no = seq_no + 1;
1114 qca_memdump->received_dump += skb->len;
1116 bt_dev_err(hu->hdev,
1117 "QCA memdump received %d, no space for packet %d",
1118 qca_memdump->received_dump, seq_no);
1120 qca->qca_memdump = qca_memdump;
1122 if (seq_no == QCA_LAST_SEQUENCE_NUM) {
1123 bt_dev_info(hu->hdev,
1124 "QCA memdump Done, received %d, total %d",
1125 qca_memdump->received_dump,
1126 qca_memdump->ram_dump_size);
1127 memdump_buf = qca_memdump->memdump_buf_head;
1128 dev_coredumpv(&hu->serdev->dev, memdump_buf,
1129 qca_memdump->received_dump, GFP_KERNEL);
1130 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1131 kfree(qca->qca_memdump);
1132 qca->qca_memdump = NULL;
1133 qca->memdump_state = QCA_MEMDUMP_COLLECTED;
1134 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1137 mutex_unlock(&qca->hci_memdump_lock);
1142 static int qca_controller_memdump_event(struct hci_dev *hdev,
1143 struct sk_buff *skb)
1145 struct hci_uart *hu = hci_get_drvdata(hdev);
1146 struct qca_data *qca = hu->priv;
1148 set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1149 skb_queue_tail(&qca->rx_memdump_q, skb);
1150 queue_work(qca->workqueue, &qca->ctrl_memdump_evt);
1155 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
1157 struct hci_uart *hu = hci_get_drvdata(hdev);
1158 struct qca_data *qca = hu->priv;
1160 if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) {
1161 struct hci_event_hdr *hdr = (void *)skb->data;
1163 /* For the WCN3990 the vendor command for a baudrate change
1164 * isn't sent as synchronous HCI command, because the
1165 * controller sends the corresponding vendor event with the
1166 * new baudrate. The event is received and properly decoded
1167 * after changing the baudrate of the host port. It needs to
1168 * be dropped, otherwise it can be misinterpreted as
1169 * response to a later firmware download command (also a
1173 if (hdr->evt == HCI_EV_VENDOR)
1174 complete(&qca->drop_ev_comp);
1180 /* We receive chip memory dump as an event packet, With a dedicated
1181 * handler followed by a hardware error event. When this event is
1182 * received we store dump into a file before closing hci. This
1183 * dump will help in triaging the issues.
1185 if ((skb->data[0] == HCI_VENDOR_PKT) &&
1186 (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE))
1187 return qca_controller_memdump_event(hdev, skb);
1189 return hci_recv_frame(hdev, skb);
1192 #define QCA_IBS_SLEEP_IND_EVENT \
1193 .type = HCI_IBS_SLEEP_IND, \
1197 .maxlen = HCI_MAX_IBS_SIZE
1199 #define QCA_IBS_WAKE_IND_EVENT \
1200 .type = HCI_IBS_WAKE_IND, \
1204 .maxlen = HCI_MAX_IBS_SIZE
1206 #define QCA_IBS_WAKE_ACK_EVENT \
1207 .type = HCI_IBS_WAKE_ACK, \
1211 .maxlen = HCI_MAX_IBS_SIZE
1213 static const struct h4_recv_pkt qca_recv_pkts[] = {
1214 { H4_RECV_ACL, .recv = qca_recv_acl_data },
1215 { H4_RECV_SCO, .recv = hci_recv_frame },
1216 { H4_RECV_EVENT, .recv = qca_recv_event },
1217 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind },
1218 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack },
1219 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
1222 static int qca_recv(struct hci_uart *hu, const void *data, int count)
1224 struct qca_data *qca = hu->priv;
1226 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
1229 qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
1230 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
1231 if (IS_ERR(qca->rx_skb)) {
1232 int err = PTR_ERR(qca->rx_skb);
1233 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
1241 static struct sk_buff *qca_dequeue(struct hci_uart *hu)
1243 struct qca_data *qca = hu->priv;
1245 return skb_dequeue(&qca->txq);
1248 static uint8_t qca_get_baudrate_value(int speed)
1252 return QCA_BAUDRATE_9600;
1254 return QCA_BAUDRATE_19200;
1256 return QCA_BAUDRATE_38400;
1258 return QCA_BAUDRATE_57600;
1260 return QCA_BAUDRATE_115200;
1262 return QCA_BAUDRATE_230400;
1264 return QCA_BAUDRATE_460800;
1266 return QCA_BAUDRATE_500000;
1268 return QCA_BAUDRATE_921600;
1270 return QCA_BAUDRATE_1000000;
1272 return QCA_BAUDRATE_2000000;
1274 return QCA_BAUDRATE_3000000;
1276 return QCA_BAUDRATE_3200000;
1278 return QCA_BAUDRATE_3500000;
1280 return QCA_BAUDRATE_115200;
1284 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
1286 struct hci_uart *hu = hci_get_drvdata(hdev);
1287 struct qca_data *qca = hu->priv;
1288 struct sk_buff *skb;
1289 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
1291 if (baudrate > QCA_BAUDRATE_3200000)
1296 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1298 bt_dev_err(hdev, "Failed to allocate baudrate packet");
1302 /* Assign commands to change baudrate and packet type. */
1303 skb_put_data(skb, cmd, sizeof(cmd));
1304 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1306 skb_queue_tail(&qca->txq, skb);
1307 hci_uart_tx_wakeup(hu);
1309 /* Wait for the baudrate change request to be sent */
1311 while (!skb_queue_empty(&qca->txq))
1312 usleep_range(100, 200);
1315 serdev_device_wait_until_sent(hu->serdev,
1316 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
1318 /* Give the controller time to process the request */
1319 if (qca_is_wcn399x(qca_soc_type(hu)) ||
1320 qca_is_wcn6750(qca_soc_type(hu)))
1321 usleep_range(1000, 10000);
1328 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
1331 serdev_device_set_baudrate(hu->serdev, speed);
1333 hci_uart_set_baudrate(hu, speed);
1336 static int qca_send_power_pulse(struct hci_uart *hu, bool on)
1339 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
1340 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;
1342 /* These power pulses are single byte command which are sent
1343 * at required baudrate to wcn3990. On wcn3990, we have an external
1344 * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1345 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1346 * and also we use the same power inputs to turn on and off for
1347 * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1348 * we send a power on pulse at 115200 bps. This algorithm will help to
1349 * save power. Disabling hardware flow control is mandatory while
1350 * sending power pulses to SoC.
1352 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);
1354 serdev_device_write_flush(hu->serdev);
1355 hci_uart_set_flow_control(hu, true);
1356 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
1358 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);
1362 serdev_device_wait_until_sent(hu->serdev, timeout);
1363 hci_uart_set_flow_control(hu, false);
1365 /* Give to controller time to boot/shutdown */
1369 usleep_range(1000, 10000);
1374 static unsigned int qca_get_speed(struct hci_uart *hu,
1375 enum qca_speed_type speed_type)
1377 unsigned int speed = 0;
1379 if (speed_type == QCA_INIT_SPEED) {
1381 speed = hu->init_speed;
1382 else if (hu->proto->init_speed)
1383 speed = hu->proto->init_speed;
1386 speed = hu->oper_speed;
1387 else if (hu->proto->oper_speed)
1388 speed = hu->proto->oper_speed;
1394 static int qca_check_speeds(struct hci_uart *hu)
1396 if (qca_is_wcn399x(qca_soc_type(hu)) ||
1397 qca_is_wcn6750(qca_soc_type(hu))) {
1398 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
1399 !qca_get_speed(hu, QCA_OPER_SPEED))
1402 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
1403 !qca_get_speed(hu, QCA_OPER_SPEED))
1410 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
1412 unsigned int speed, qca_baudrate;
1413 struct qca_data *qca = hu->priv;
1416 if (speed_type == QCA_INIT_SPEED) {
1417 speed = qca_get_speed(hu, QCA_INIT_SPEED);
1419 host_set_baudrate(hu, speed);
1421 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1423 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1427 /* Disable flow control for wcn3990 to deassert RTS while
1428 * changing the baudrate of chip and host.
1430 if (qca_is_wcn399x(soc_type) ||
1431 qca_is_wcn6750(soc_type))
1432 hci_uart_set_flow_control(hu, true);
1434 if (soc_type == QCA_WCN3990) {
1435 reinit_completion(&qca->drop_ev_comp);
1436 set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1439 qca_baudrate = qca_get_baudrate_value(speed);
1440 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
1441 ret = qca_set_baudrate(hu->hdev, qca_baudrate);
1445 host_set_baudrate(hu, speed);
1448 if (qca_is_wcn399x(soc_type) ||
1449 qca_is_wcn6750(soc_type))
1450 hci_uart_set_flow_control(hu, false);
1452 if (soc_type == QCA_WCN3990) {
1453 /* Wait for the controller to send the vendor event
1454 * for the baudrate change command.
1456 if (!wait_for_completion_timeout(&qca->drop_ev_comp,
1457 msecs_to_jiffies(100))) {
1458 bt_dev_err(hu->hdev,
1459 "Failed to change controller baudrate\n");
1463 clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1470 static int qca_send_crashbuffer(struct hci_uart *hu)
1472 struct qca_data *qca = hu->priv;
1473 struct sk_buff *skb;
1475 skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL);
1477 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet");
1481 /* We forcefully crash the controller, by sending 0xfb byte for
1482 * 1024 times. We also might have chance of losing data, To be
1483 * on safer side we send 1096 bytes to the SoC.
1485 memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE,
1486 QCA_CRASHBYTE_PACKET_LEN);
1487 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1488 bt_dev_info(hu->hdev, "crash the soc to collect controller dump");
1489 skb_queue_tail(&qca->txq, skb);
1490 hci_uart_tx_wakeup(hu);
1495 static void qca_wait_for_dump_collection(struct hci_dev *hdev)
1497 struct hci_uart *hu = hci_get_drvdata(hdev);
1498 struct qca_data *qca = hu->priv;
1500 wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION,
1501 TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS);
1503 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1506 static void qca_hw_error(struct hci_dev *hdev, u8 code)
1508 struct hci_uart *hu = hci_get_drvdata(hdev);
1509 struct qca_data *qca = hu->priv;
1511 set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1512 set_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1513 bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state);
1515 if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1516 /* If hardware error event received for other than QCA
1517 * soc memory dump event, then we need to crash the SOC
1518 * and wait here for 8 seconds to get the dump packets.
1519 * This will block main thread to be on hold until we
1522 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1523 qca_send_crashbuffer(hu);
1524 qca_wait_for_dump_collection(hdev);
1525 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1526 /* Let us wait here until memory dump collected or
1527 * memory dump timer expired.
1529 bt_dev_info(hdev, "waiting for dump to complete");
1530 qca_wait_for_dump_collection(hdev);
1533 mutex_lock(&qca->hci_memdump_lock);
1534 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1535 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout");
1536 if (qca->qca_memdump) {
1537 vfree(qca->qca_memdump->memdump_buf_head);
1538 kfree(qca->qca_memdump);
1539 qca->qca_memdump = NULL;
1541 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1542 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1544 mutex_unlock(&qca->hci_memdump_lock);
1546 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1547 qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1548 cancel_work_sync(&qca->ctrl_memdump_evt);
1549 skb_queue_purge(&qca->rx_memdump_q);
1552 clear_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1555 static void qca_cmd_timeout(struct hci_dev *hdev)
1557 struct hci_uart *hu = hci_get_drvdata(hdev);
1558 struct qca_data *qca = hu->priv;
1560 set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1561 if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1562 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1563 qca_send_crashbuffer(hu);
1564 qca_wait_for_dump_collection(hdev);
1565 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1566 /* Let us wait here until memory dump collected or
1567 * memory dump timer expired.
1569 bt_dev_info(hdev, "waiting for dump to complete");
1570 qca_wait_for_dump_collection(hdev);
1573 mutex_lock(&qca->hci_memdump_lock);
1574 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1575 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1576 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
1577 /* Inject hw error event to reset the device
1580 hci_reset_dev(hu->hdev);
1583 mutex_unlock(&qca->hci_memdump_lock);
1586 static bool qca_wakeup(struct hci_dev *hdev)
1588 struct hci_uart *hu = hci_get_drvdata(hdev);
1591 /* BT SoC attached through the serial bus is handled by the serdev driver.
1592 * So we need to use the device handle of the serdev driver to get the
1593 * status of device may wakeup.
1595 wakeup = device_may_wakeup(&hu->serdev->ctrl->dev);
1596 bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup);
1601 static int qca_regulator_init(struct hci_uart *hu)
1603 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1604 struct qca_serdev *qcadev;
1608 /* Check for vregs status, may be hci down has turned
1609 * off the voltage regulator.
1611 qcadev = serdev_device_get_drvdata(hu->serdev);
1612 if (!qcadev->bt_power->vregs_on) {
1613 serdev_device_close(hu->serdev);
1614 ret = qca_regulator_enable(qcadev);
1618 ret = serdev_device_open(hu->serdev);
1620 bt_dev_err(hu->hdev, "failed to open port");
1625 if (qca_is_wcn399x(soc_type)) {
1626 /* Forcefully enable wcn399x to enter in to boot mode. */
1627 host_set_baudrate(hu, 2400);
1628 ret = qca_send_power_pulse(hu, false);
1633 /* For wcn6750 need to enable gpio bt_en */
1634 if (qcadev->bt_en) {
1635 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1637 gpiod_set_value_cansleep(qcadev->bt_en, 1);
1639 if (qcadev->sw_ctrl) {
1640 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
1641 bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
1645 qca_set_speed(hu, QCA_INIT_SPEED);
1647 if (qca_is_wcn399x(soc_type)) {
1648 ret = qca_send_power_pulse(hu, true);
1653 /* Now the device is in ready state to communicate with host.
1654 * To sync host with device we need to reopen port.
1655 * Without this, we will have RTS and CTS synchronization
1658 serdev_device_close(hu->serdev);
1659 ret = serdev_device_open(hu->serdev);
1661 bt_dev_err(hu->hdev, "failed to open port");
1665 hci_uart_set_flow_control(hu, false);
1670 static int qca_power_on(struct hci_dev *hdev)
1672 struct hci_uart *hu = hci_get_drvdata(hdev);
1673 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1674 struct qca_serdev *qcadev;
1675 struct qca_data *qca = hu->priv;
1678 /* Non-serdev device usually is powered by external power
1679 * and don't need additional action in driver for power on
1684 if (qca_is_wcn399x(soc_type) ||
1685 qca_is_wcn6750(soc_type)) {
1686 ret = qca_regulator_init(hu);
1688 qcadev = serdev_device_get_drvdata(hu->serdev);
1689 if (qcadev->bt_en) {
1690 gpiod_set_value_cansleep(qcadev->bt_en, 1);
1691 /* Controller needs time to bootup. */
1696 clear_bit(QCA_BT_OFF, &qca->flags);
1700 static int qca_setup(struct hci_uart *hu)
1702 struct hci_dev *hdev = hu->hdev;
1703 struct qca_data *qca = hu->priv;
1704 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
1705 unsigned int retries = 0;
1706 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1707 const char *firmware_name = qca_get_firmware_name(hu);
1709 struct qca_btsoc_version ver;
1711 ret = qca_check_speeds(hu);
1715 clear_bit(QCA_ROM_FW, &qca->flags);
1716 /* Patch downloading has to be done without IBS mode */
1717 set_bit(QCA_IBS_DISABLED, &qca->flags);
1719 /* Enable controller to do both LE scan and BR/EDR inquiry
1722 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1724 bt_dev_info(hdev, "setting up %s",
1725 qca_is_wcn399x(soc_type) ? "wcn399x" :
1726 (soc_type == QCA_WCN6750) ? "wcn6750" : "ROME/QCA6390");
1728 qca->memdump_state = QCA_MEMDUMP_IDLE;
1731 ret = qca_power_on(hdev);
1735 clear_bit(QCA_SSR_TRIGGERED, &qca->flags);
1737 if (qca_is_wcn399x(soc_type) ||
1738 qca_is_wcn6750(soc_type)) {
1739 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
1740 hci_set_aosp_capable(hdev);
1742 ret = qca_read_soc_version(hdev, &ver, soc_type);
1746 qca_set_speed(hu, QCA_INIT_SPEED);
1749 /* Setup user speed if needed */
1750 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1752 ret = qca_set_speed(hu, QCA_OPER_SPEED);
1756 qca_baudrate = qca_get_baudrate_value(speed);
1759 if (!(qca_is_wcn399x(soc_type) ||
1760 qca_is_wcn6750(soc_type))) {
1761 /* Get QCA version information */
1762 ret = qca_read_soc_version(hdev, &ver, soc_type);
1767 /* Setup patch / NVM configurations */
1768 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver,
1771 clear_bit(QCA_IBS_DISABLED, &qca->flags);
1772 qca_debugfs_init(hdev);
1773 hu->hdev->hw_error = qca_hw_error;
1774 hu->hdev->cmd_timeout = qca_cmd_timeout;
1775 if (device_can_wakeup(hu->serdev->ctrl->dev.parent))
1776 hu->hdev->wakeup = qca_wakeup;
1777 } else if (ret == -ENOENT) {
1778 /* No patch/nvm-config found, run with original fw/config */
1779 set_bit(QCA_ROM_FW, &qca->flags);
1781 } else if (ret == -EAGAIN) {
1783 * Userspace firmware loader will return -EAGAIN in case no
1784 * patch/nvm-config is found, so run with original fw/config.
1786 set_bit(QCA_ROM_FW, &qca->flags);
1791 if (ret && retries < MAX_INIT_RETRIES) {
1792 bt_dev_warn(hdev, "Retry BT power ON:%d", retries);
1793 qca_power_shutdown(hu);
1795 serdev_device_close(hu->serdev);
1796 ret = serdev_device_open(hu->serdev);
1798 bt_dev_err(hdev, "failed to open port");
1807 if (soc_type == QCA_ROME)
1808 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
1810 hu->hdev->set_bdaddr = qca_set_bdaddr;
1815 static const struct hci_uart_proto qca_proto = {
1819 .init_speed = 115200,
1820 .oper_speed = 3000000,
1826 .enqueue = qca_enqueue,
1827 .dequeue = qca_dequeue,
1830 static const struct qca_device_data qca_soc_data_wcn3990 = {
1831 .soc_type = QCA_WCN3990,
1832 .vregs = (struct qca_vreg []) {
1835 { "vddrf", 300000 },
1836 { "vddch0", 450000 },
1841 static const struct qca_device_data qca_soc_data_wcn3991 = {
1842 .soc_type = QCA_WCN3991,
1843 .vregs = (struct qca_vreg []) {
1846 { "vddrf", 300000 },
1847 { "vddch0", 450000 },
1850 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
1853 static const struct qca_device_data qca_soc_data_wcn3998 = {
1854 .soc_type = QCA_WCN3998,
1855 .vregs = (struct qca_vreg []) {
1858 { "vddrf", 300000 },
1859 { "vddch0", 450000 },
1864 static const struct qca_device_data qca_soc_data_qca6390 = {
1865 .soc_type = QCA_QCA6390,
1869 static const struct qca_device_data qca_soc_data_wcn6750 = {
1870 .soc_type = QCA_WCN6750,
1871 .vregs = (struct qca_vreg []) {
1873 { "vddaon", 26000 },
1874 { "vddbtcxmx", 126000 },
1875 { "vddrfacmn", 12500 },
1876 { "vddrfa0p8", 102000 },
1877 { "vddrfa1p7", 302000 },
1878 { "vddrfa1p2", 257000 },
1879 { "vddrfa2p2", 1700000 },
1883 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
1886 static void qca_power_shutdown(struct hci_uart *hu)
1888 struct qca_serdev *qcadev;
1889 struct qca_data *qca = hu->priv;
1890 unsigned long flags;
1891 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1894 /* From this point we go into power off state. But serial port is
1895 * still open, stop queueing the IBS data and flush all the buffered
1898 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
1899 set_bit(QCA_IBS_DISABLED, &qca->flags);
1901 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
1903 /* Non-serdev device usually is powered by external power
1904 * and don't need additional action in driver for power down
1909 qcadev = serdev_device_get_drvdata(hu->serdev);
1911 if (qca_is_wcn399x(soc_type)) {
1912 host_set_baudrate(hu, 2400);
1913 qca_send_power_pulse(hu, false);
1914 qca_regulator_disable(qcadev);
1915 } else if (soc_type == QCA_WCN6750) {
1916 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1918 qca_regulator_disable(qcadev);
1919 if (qcadev->sw_ctrl) {
1920 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
1921 bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
1923 } else if (qcadev->bt_en) {
1924 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1927 set_bit(QCA_BT_OFF, &qca->flags);
1930 static int qca_power_off(struct hci_dev *hdev)
1932 struct hci_uart *hu = hci_get_drvdata(hdev);
1933 struct qca_data *qca = hu->priv;
1934 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1936 hu->hdev->hw_error = NULL;
1937 hu->hdev->cmd_timeout = NULL;
1939 del_timer_sync(&qca->wake_retrans_timer);
1940 del_timer_sync(&qca->tx_idle_timer);
1942 /* Stop sending shutdown command if soc crashes. */
1943 if (soc_type != QCA_ROME
1944 && qca->memdump_state == QCA_MEMDUMP_IDLE) {
1945 qca_send_pre_shutdown_cmd(hdev);
1946 usleep_range(8000, 10000);
1949 qca_power_shutdown(hu);
1953 static int qca_regulator_enable(struct qca_serdev *qcadev)
1955 struct qca_power *power = qcadev->bt_power;
1958 /* Already enabled */
1959 if (power->vregs_on)
1962 BT_DBG("enabling %d regulators)", power->num_vregs);
1964 ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk);
1968 power->vregs_on = true;
1970 ret = clk_prepare_enable(qcadev->susclk);
1972 qca_regulator_disable(qcadev);
1977 static void qca_regulator_disable(struct qca_serdev *qcadev)
1979 struct qca_power *power;
1984 power = qcadev->bt_power;
1986 /* Already disabled? */
1987 if (!power->vregs_on)
1990 regulator_bulk_disable(power->num_vregs, power->vreg_bulk);
1991 power->vregs_on = false;
1993 clk_disable_unprepare(qcadev->susclk);
1996 static int qca_init_regulators(struct qca_power *qca,
1997 const struct qca_vreg *vregs, size_t num_vregs)
1999 struct regulator_bulk_data *bulk;
2003 bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL);
2007 for (i = 0; i < num_vregs; i++)
2008 bulk[i].supply = vregs[i].name;
2010 ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk);
2014 for (i = 0; i < num_vregs; i++) {
2015 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA);
2020 qca->vreg_bulk = bulk;
2021 qca->num_vregs = num_vregs;
2026 static int qca_serdev_probe(struct serdev_device *serdev)
2028 struct qca_serdev *qcadev;
2029 struct hci_dev *hdev;
2030 const struct qca_device_data *data;
2032 bool power_ctrl_enabled = true;
2034 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
2038 qcadev->serdev_hu.serdev = serdev;
2039 data = device_get_match_data(&serdev->dev);
2040 serdev_device_set_drvdata(serdev, qcadev);
2041 device_property_read_string(&serdev->dev, "firmware-name",
2042 &qcadev->firmware_name);
2043 device_property_read_u32(&serdev->dev, "max-speed",
2044 &qcadev->oper_speed);
2045 if (!qcadev->oper_speed)
2046 BT_DBG("UART will pick default operating speed");
2049 (qca_is_wcn399x(data->soc_type) ||
2050 qca_is_wcn6750(data->soc_type))) {
2051 qcadev->btsoc_type = data->soc_type;
2052 qcadev->bt_power = devm_kzalloc(&serdev->dev,
2053 sizeof(struct qca_power),
2055 if (!qcadev->bt_power)
2058 qcadev->bt_power->dev = &serdev->dev;
2059 err = qca_init_regulators(qcadev->bt_power, data->vregs,
2062 BT_ERR("Failed to init regulators:%d", err);
2066 qcadev->bt_power->vregs_on = false;
2068 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2070 if (IS_ERR_OR_NULL(qcadev->bt_en) && data->soc_type == QCA_WCN6750) {
2071 dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");
2072 power_ctrl_enabled = false;
2075 qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
2077 if (IS_ERR_OR_NULL(qcadev->sw_ctrl) && data->soc_type == QCA_WCN6750)
2078 dev_warn(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
2080 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2081 if (IS_ERR(qcadev->susclk)) {
2082 dev_err(&serdev->dev, "failed to acquire clk\n");
2083 return PTR_ERR(qcadev->susclk);
2086 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2088 BT_ERR("wcn3990 serdev registration failed");
2093 qcadev->btsoc_type = data->soc_type;
2095 qcadev->btsoc_type = QCA_ROME;
2097 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2099 if (IS_ERR_OR_NULL(qcadev->bt_en)) {
2100 dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
2101 power_ctrl_enabled = false;
2104 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2105 if (IS_ERR(qcadev->susclk)) {
2106 dev_warn(&serdev->dev, "failed to acquire clk\n");
2107 return PTR_ERR(qcadev->susclk);
2109 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
2113 err = clk_prepare_enable(qcadev->susclk);
2117 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2119 BT_ERR("Rome serdev registration failed");
2120 clk_disable_unprepare(qcadev->susclk);
2125 hdev = qcadev->serdev_hu.hdev;
2127 if (power_ctrl_enabled) {
2128 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
2129 hdev->shutdown = qca_power_off;
2133 /* Wideband speech support must be set per driver since it can't
2134 * be queried via hci. Same with the valid le states quirk.
2136 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH)
2137 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
2140 if (data->capabilities & QCA_CAP_VALID_LE_STATES)
2141 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
2147 static void qca_serdev_remove(struct serdev_device *serdev)
2149 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2150 struct qca_power *power = qcadev->bt_power;
2152 if ((qca_is_wcn399x(qcadev->btsoc_type) ||
2153 qca_is_wcn6750(qcadev->btsoc_type)) &&
2155 qca_power_shutdown(&qcadev->serdev_hu);
2156 else if (qcadev->susclk)
2157 clk_disable_unprepare(qcadev->susclk);
2159 hci_uart_unregister_device(&qcadev->serdev_hu);
2162 static void qca_serdev_shutdown(struct device *dev)
2165 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
2166 struct serdev_device *serdev = to_serdev_device(dev);
2167 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2168 struct hci_uart *hu = &qcadev->serdev_hu;
2169 struct hci_dev *hdev = hu->hdev;
2170 struct qca_data *qca = hu->priv;
2171 const u8 ibs_wake_cmd[] = { 0xFD };
2172 const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
2174 if (qcadev->btsoc_type == QCA_QCA6390) {
2175 if (test_bit(QCA_BT_OFF, &qca->flags) ||
2176 !test_bit(HCI_RUNNING, &hdev->flags))
2179 serdev_device_write_flush(serdev);
2180 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,
2181 sizeof(ibs_wake_cmd));
2183 BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);
2186 serdev_device_wait_until_sent(serdev, timeout);
2187 usleep_range(8000, 10000);
2189 serdev_device_write_flush(serdev);
2190 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd,
2191 sizeof(edl_reset_soc_cmd));
2193 BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
2196 serdev_device_wait_until_sent(serdev, timeout);
2197 usleep_range(8000, 10000);
2201 static int __maybe_unused qca_suspend(struct device *dev)
2203 struct serdev_device *serdev = to_serdev_device(dev);
2204 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2205 struct hci_uart *hu = &qcadev->serdev_hu;
2206 struct qca_data *qca = hu->priv;
2207 unsigned long flags;
2208 bool tx_pending = false;
2211 u32 wait_timeout = 0;
2213 set_bit(QCA_SUSPENDING, &qca->flags);
2215 /* if BT SoC is running with default firmware then it does not
2216 * support in-band sleep
2218 if (test_bit(QCA_ROM_FW, &qca->flags))
2221 /* During SSR after memory dump collection, controller will be
2222 * powered off and then powered on.If controller is powered off
2223 * during SSR then we should wait until SSR is completed.
2225 if (test_bit(QCA_BT_OFF, &qca->flags) &&
2226 !test_bit(QCA_SSR_TRIGGERED, &qca->flags))
2229 if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
2230 test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
2231 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ?
2232 IBS_DISABLE_SSR_TIMEOUT_MS :
2233 FW_DOWNLOAD_TIMEOUT_MS;
2235 /* QCA_IBS_DISABLED flag is set to true, During FW download
2236 * and during memory dump collection. It is reset to false,
2237 * After FW download complete.
2239 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED,
2240 TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout));
2242 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) {
2243 bt_dev_err(hu->hdev, "SSR or FW download time out");
2249 cancel_work_sync(&qca->ws_awake_device);
2250 cancel_work_sync(&qca->ws_awake_rx);
2252 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
2253 flags, SINGLE_DEPTH_NESTING);
2255 switch (qca->tx_ibs_state) {
2256 case HCI_IBS_TX_WAKING:
2257 del_timer(&qca->wake_retrans_timer);
2259 case HCI_IBS_TX_AWAKE:
2260 del_timer(&qca->tx_idle_timer);
2262 serdev_device_write_flush(hu->serdev);
2263 cmd = HCI_IBS_SLEEP_IND;
2264 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
2267 BT_ERR("Failed to send SLEEP to device");
2271 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
2272 qca->ibs_sent_slps++;
2276 case HCI_IBS_TX_ASLEEP:
2280 BT_ERR("Spurious tx state %d", qca->tx_ibs_state);
2285 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
2291 serdev_device_wait_until_sent(hu->serdev,
2292 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
2293 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
2296 /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going
2297 * to sleep, so that the packet does not wake the system later.
2299 ret = wait_event_interruptible_timeout(qca->suspend_wait_q,
2300 qca->rx_ibs_state == HCI_IBS_RX_ASLEEP,
2301 msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS));
2310 clear_bit(QCA_SUSPENDING, &qca->flags);
2315 static int __maybe_unused qca_resume(struct device *dev)
2317 struct serdev_device *serdev = to_serdev_device(dev);
2318 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2319 struct hci_uart *hu = &qcadev->serdev_hu;
2320 struct qca_data *qca = hu->priv;
2322 clear_bit(QCA_SUSPENDING, &qca->flags);
2327 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume);
2330 static const struct of_device_id qca_bluetooth_of_match[] = {
2331 { .compatible = "qcom,qca6174-bt" },
2332 { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},
2333 { .compatible = "qcom,qca9377-bt" },
2334 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},
2335 { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},
2336 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},
2337 { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750},
2340 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
2344 static const struct acpi_device_id qca_bluetooth_acpi_match[] = {
2345 { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2346 { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2347 { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2348 { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2351 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match);
2355 static struct serdev_device_driver qca_serdev_driver = {
2356 .probe = qca_serdev_probe,
2357 .remove = qca_serdev_remove,
2359 .name = "hci_uart_qca",
2360 .of_match_table = of_match_ptr(qca_bluetooth_of_match),
2361 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
2362 .shutdown = qca_serdev_shutdown,
2367 int __init qca_init(void)
2369 serdev_device_driver_register(&qca_serdev_driver);
2371 return hci_uart_register_proto(&qca_proto);
2374 int __exit qca_deinit(void)
2376 serdev_device_driver_unregister(&qca_serdev_driver);
2378 return hci_uart_unregister_proto(&qca_proto);