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/device.h>
24 #include <linux/gpio/consumer.h>
25 #include <linux/mod_devicetable.h>
26 #include <linux/module.h>
27 #include <linux/of_device.h>
28 #include <linux/platform_device.h>
29 #include <linux/regulator/consumer.h>
30 #include <linux/serdev.h>
31 #include <asm/unaligned.h>
33 #include <net/bluetooth/bluetooth.h>
34 #include <net/bluetooth/hci_core.h>
39 /* HCI_IBS protocol messages */
40 #define HCI_IBS_SLEEP_IND 0xFE
41 #define HCI_IBS_WAKE_IND 0xFD
42 #define HCI_IBS_WAKE_ACK 0xFC
43 #define HCI_MAX_IBS_SIZE 10
45 #define IBS_WAKE_RETRANS_TIMEOUT_MS 100
46 #define IBS_TX_IDLE_TIMEOUT_MS 2000
47 #define CMD_TRANS_TIMEOUT_MS 100
50 #define SUSCLK_RATE_32KHZ 32768
52 /* Controller debug log header */
53 #define QCA_DEBUG_HANDLE 0x2EDC
57 QCA_DROP_VENDOR_EVENT
,
60 /* HCI_IBS transmit side sleep protocol states */
67 /* HCI_IBS receive side sleep protocol states */
73 /* HCI_IBS transmit and receive side clock state vote */
74 enum hci_ibs_clock_state_vote
{
75 HCI_IBS_VOTE_STATS_UPDATE
,
76 HCI_IBS_TX_VOTE_CLOCK_ON
,
77 HCI_IBS_TX_VOTE_CLOCK_OFF
,
78 HCI_IBS_RX_VOTE_CLOCK_ON
,
79 HCI_IBS_RX_VOTE_CLOCK_OFF
,
84 struct sk_buff
*rx_skb
;
85 struct sk_buff_head txq
;
86 struct sk_buff_head tx_wait_q
; /* HCI_IBS wait queue */
87 spinlock_t hci_ibs_lock
; /* HCI_IBS state lock */
88 u8 tx_ibs_state
; /* HCI_IBS transmit side power state*/
89 u8 rx_ibs_state
; /* HCI_IBS receive side power state */
90 bool tx_vote
; /* Clock must be on for TX */
91 bool rx_vote
; /* Clock must be on for RX */
92 struct timer_list tx_idle_timer
;
94 struct timer_list wake_retrans_timer
;
96 struct workqueue_struct
*workqueue
;
97 struct work_struct ws_awake_rx
;
98 struct work_struct ws_awake_device
;
99 struct work_struct ws_rx_vote_off
;
100 struct work_struct ws_tx_vote_off
;
102 struct completion drop_ev_comp
;
104 /* For debugging purpose */
122 enum qca_speed_type
{
128 * Voltage regulator information required for configuring the
129 * QCA Bluetooth chipset
135 unsigned int load_uA
;
138 struct qca_vreg_data
{
139 enum qca_btsoc_type soc_type
;
140 struct qca_vreg
*vregs
;
145 * Platform data for the QCA Bluetooth power driver.
149 const struct qca_vreg_data
*vreg_data
;
150 struct regulator_bulk_data
*vreg_bulk
;
155 struct hci_uart serdev_hu
;
156 struct gpio_desc
*bt_en
;
158 enum qca_btsoc_type btsoc_type
;
159 struct qca_power
*bt_power
;
162 const char *firmware_name
;
165 static int qca_power_setup(struct hci_uart
*hu
, bool on
);
166 static void qca_power_shutdown(struct hci_uart
*hu
);
167 static int qca_power_off(struct hci_dev
*hdev
);
169 static enum qca_btsoc_type
qca_soc_type(struct hci_uart
*hu
)
171 enum qca_btsoc_type soc_type
;
174 struct qca_serdev
*qsd
= serdev_device_get_drvdata(hu
->serdev
);
176 soc_type
= qsd
->btsoc_type
;
184 static const char *qca_get_firmware_name(struct hci_uart
*hu
)
187 struct qca_serdev
*qsd
= serdev_device_get_drvdata(hu
->serdev
);
189 return qsd
->firmware_name
;
195 static void __serial_clock_on(struct tty_struct
*tty
)
197 /* TODO: Some chipset requires to enable UART clock on client
198 * side to save power consumption or manual work is required.
199 * Please put your code to control UART clock here if needed
203 static void __serial_clock_off(struct tty_struct
*tty
)
205 /* TODO: Some chipset requires to disable UART clock on client
206 * side to save power consumption or manual work is required.
207 * Please put your code to control UART clock off here if needed
211 /* serial_clock_vote needs to be called with the ibs lock held */
212 static void serial_clock_vote(unsigned long vote
, struct hci_uart
*hu
)
214 struct qca_data
*qca
= hu
->priv
;
217 bool old_vote
= (qca
->tx_vote
| qca
->rx_vote
);
221 case HCI_IBS_VOTE_STATS_UPDATE
:
222 diff
= jiffies_to_msecs(jiffies
- qca
->vote_last_jif
);
225 qca
->vote_off_ms
+= diff
;
227 qca
->vote_on_ms
+= diff
;
230 case HCI_IBS_TX_VOTE_CLOCK_ON
:
236 case HCI_IBS_RX_VOTE_CLOCK_ON
:
242 case HCI_IBS_TX_VOTE_CLOCK_OFF
:
243 qca
->tx_vote
= false;
245 new_vote
= qca
->rx_vote
| qca
->tx_vote
;
248 case HCI_IBS_RX_VOTE_CLOCK_OFF
:
249 qca
->rx_vote
= false;
251 new_vote
= qca
->rx_vote
| qca
->tx_vote
;
255 BT_ERR("Voting irregularity");
259 if (new_vote
!= old_vote
) {
261 __serial_clock_on(hu
->tty
);
263 __serial_clock_off(hu
->tty
);
265 BT_DBG("Vote serial clock %s(%s)", new_vote
? "true" : "false",
266 vote
? "true" : "false");
268 diff
= jiffies_to_msecs(jiffies
- qca
->vote_last_jif
);
272 qca
->vote_off_ms
+= diff
;
275 qca
->vote_on_ms
+= diff
;
277 qca
->vote_last_jif
= jiffies
;
281 /* Builds and sends an HCI_IBS command packet.
282 * These are very simple packets with only 1 cmd byte.
284 static int send_hci_ibs_cmd(u8 cmd
, struct hci_uart
*hu
)
287 struct sk_buff
*skb
= NULL
;
288 struct qca_data
*qca
= hu
->priv
;
290 BT_DBG("hu %p send hci ibs cmd 0x%x", hu
, cmd
);
292 skb
= bt_skb_alloc(1, GFP_ATOMIC
);
294 BT_ERR("Failed to allocate memory for HCI_IBS packet");
298 /* Assign HCI_IBS type */
299 skb_put_u8(skb
, cmd
);
301 skb_queue_tail(&qca
->txq
, skb
);
306 static void qca_wq_awake_device(struct work_struct
*work
)
308 struct qca_data
*qca
= container_of(work
, struct qca_data
,
310 struct hci_uart
*hu
= qca
->hu
;
311 unsigned long retrans_delay
;
314 BT_DBG("hu %p wq awake device", hu
);
316 /* Vote for serial clock */
317 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON
, hu
);
319 spin_lock_irqsave(&qca
->hci_ibs_lock
, flags
);
321 /* Send wake indication to device */
322 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND
, hu
) < 0)
323 BT_ERR("Failed to send WAKE to device");
325 qca
->ibs_sent_wakes
++;
327 /* Start retransmit timer */
328 retrans_delay
= msecs_to_jiffies(qca
->wake_retrans
);
329 mod_timer(&qca
->wake_retrans_timer
, jiffies
+ retrans_delay
);
331 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
333 /* Actually send the packets */
334 hci_uart_tx_wakeup(hu
);
337 static void qca_wq_awake_rx(struct work_struct
*work
)
339 struct qca_data
*qca
= container_of(work
, struct qca_data
,
341 struct hci_uart
*hu
= qca
->hu
;
344 BT_DBG("hu %p wq awake rx", hu
);
346 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON
, hu
);
348 spin_lock_irqsave(&qca
->hci_ibs_lock
, flags
);
349 qca
->rx_ibs_state
= HCI_IBS_RX_AWAKE
;
351 /* Always acknowledge device wake up,
352 * sending IBS message doesn't count as TX ON.
354 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK
, hu
) < 0)
355 BT_ERR("Failed to acknowledge device wake up");
357 qca
->ibs_sent_wacks
++;
359 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
361 /* Actually send the packets */
362 hci_uart_tx_wakeup(hu
);
365 static void qca_wq_serial_rx_clock_vote_off(struct work_struct
*work
)
367 struct qca_data
*qca
= container_of(work
, struct qca_data
,
369 struct hci_uart
*hu
= qca
->hu
;
371 BT_DBG("hu %p rx clock vote off", hu
);
373 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF
, hu
);
376 static void qca_wq_serial_tx_clock_vote_off(struct work_struct
*work
)
378 struct qca_data
*qca
= container_of(work
, struct qca_data
,
380 struct hci_uart
*hu
= qca
->hu
;
382 BT_DBG("hu %p tx clock vote off", hu
);
384 /* Run HCI tx handling unlocked */
385 hci_uart_tx_wakeup(hu
);
387 /* Now that message queued to tty driver, vote for tty clocks off.
388 * It is up to the tty driver to pend the clocks off until tx done.
390 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF
, hu
);
393 static void hci_ibs_tx_idle_timeout(struct timer_list
*t
)
395 struct qca_data
*qca
= from_timer(qca
, t
, tx_idle_timer
);
396 struct hci_uart
*hu
= qca
->hu
;
399 BT_DBG("hu %p idle timeout in %d state", hu
, qca
->tx_ibs_state
);
401 spin_lock_irqsave_nested(&qca
->hci_ibs_lock
,
402 flags
, SINGLE_DEPTH_NESTING
);
404 switch (qca
->tx_ibs_state
) {
405 case HCI_IBS_TX_AWAKE
:
406 /* TX_IDLE, go to SLEEP */
407 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND
, hu
) < 0) {
408 BT_ERR("Failed to send SLEEP to device");
411 qca
->tx_ibs_state
= HCI_IBS_TX_ASLEEP
;
412 qca
->ibs_sent_slps
++;
413 queue_work(qca
->workqueue
, &qca
->ws_tx_vote_off
);
416 case HCI_IBS_TX_ASLEEP
:
417 case HCI_IBS_TX_WAKING
:
421 BT_ERR("Spurious timeout tx state %d", qca
->tx_ibs_state
);
425 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
428 static void hci_ibs_wake_retrans_timeout(struct timer_list
*t
)
430 struct qca_data
*qca
= from_timer(qca
, t
, wake_retrans_timer
);
431 struct hci_uart
*hu
= qca
->hu
;
432 unsigned long flags
, retrans_delay
;
433 bool retransmit
= false;
435 BT_DBG("hu %p wake retransmit timeout in %d state",
436 hu
, qca
->tx_ibs_state
);
438 spin_lock_irqsave_nested(&qca
->hci_ibs_lock
,
439 flags
, SINGLE_DEPTH_NESTING
);
441 switch (qca
->tx_ibs_state
) {
442 case HCI_IBS_TX_WAKING
:
443 /* No WAKE_ACK, retransmit WAKE */
445 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND
, hu
) < 0) {
446 BT_ERR("Failed to acknowledge device wake up");
449 qca
->ibs_sent_wakes
++;
450 retrans_delay
= msecs_to_jiffies(qca
->wake_retrans
);
451 mod_timer(&qca
->wake_retrans_timer
, jiffies
+ retrans_delay
);
454 case HCI_IBS_TX_ASLEEP
:
455 case HCI_IBS_TX_AWAKE
:
459 BT_ERR("Spurious timeout tx state %d", qca
->tx_ibs_state
);
463 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
466 hci_uart_tx_wakeup(hu
);
469 /* Initialize protocol */
470 static int qca_open(struct hci_uart
*hu
)
472 struct qca_serdev
*qcadev
;
473 struct qca_data
*qca
;
476 BT_DBG("hu %p qca_open", hu
);
478 if (!hci_uart_has_flow_control(hu
))
481 qca
= kzalloc(sizeof(struct qca_data
), GFP_KERNEL
);
485 skb_queue_head_init(&qca
->txq
);
486 skb_queue_head_init(&qca
->tx_wait_q
);
487 spin_lock_init(&qca
->hci_ibs_lock
);
488 qca
->workqueue
= alloc_ordered_workqueue("qca_wq", 0);
489 if (!qca
->workqueue
) {
490 BT_ERR("QCA Workqueue not initialized properly");
495 INIT_WORK(&qca
->ws_awake_rx
, qca_wq_awake_rx
);
496 INIT_WORK(&qca
->ws_awake_device
, qca_wq_awake_device
);
497 INIT_WORK(&qca
->ws_rx_vote_off
, qca_wq_serial_rx_clock_vote_off
);
498 INIT_WORK(&qca
->ws_tx_vote_off
, qca_wq_serial_tx_clock_vote_off
);
501 init_completion(&qca
->drop_ev_comp
);
503 /* Assume we start with both sides asleep -- extra wakes OK */
504 qca
->tx_ibs_state
= HCI_IBS_TX_ASLEEP
;
505 qca
->rx_ibs_state
= HCI_IBS_RX_ASLEEP
;
507 qca
->vote_last_jif
= jiffies
;
513 qcadev
= serdev_device_get_drvdata(hu
->serdev
);
514 if (!qca_is_wcn399x(qcadev
->btsoc_type
)) {
515 gpiod_set_value_cansleep(qcadev
->bt_en
, 1);
516 /* Controller needs time to bootup. */
519 hu
->init_speed
= qcadev
->init_speed
;
520 hu
->oper_speed
= qcadev
->oper_speed
;
521 ret
= qca_power_setup(hu
, true);
523 destroy_workqueue(qca
->workqueue
);
524 kfree_skb(qca
->rx_skb
);
532 timer_setup(&qca
->wake_retrans_timer
, hci_ibs_wake_retrans_timeout
, 0);
533 qca
->wake_retrans
= IBS_WAKE_RETRANS_TIMEOUT_MS
;
535 timer_setup(&qca
->tx_idle_timer
, hci_ibs_tx_idle_timeout
, 0);
536 qca
->tx_idle_delay
= IBS_TX_IDLE_TIMEOUT_MS
;
538 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
539 qca
->tx_idle_delay
, qca
->wake_retrans
);
544 static void qca_debugfs_init(struct hci_dev
*hdev
)
546 struct hci_uart
*hu
= hci_get_drvdata(hdev
);
547 struct qca_data
*qca
= hu
->priv
;
548 struct dentry
*ibs_dir
;
554 ibs_dir
= debugfs_create_dir("ibs", hdev
->debugfs
);
558 debugfs_create_u8("tx_ibs_state", mode
, ibs_dir
, &qca
->tx_ibs_state
);
559 debugfs_create_u8("rx_ibs_state", mode
, ibs_dir
, &qca
->rx_ibs_state
);
560 debugfs_create_u64("ibs_sent_sleeps", mode
, ibs_dir
,
561 &qca
->ibs_sent_slps
);
562 debugfs_create_u64("ibs_sent_wakes", mode
, ibs_dir
,
563 &qca
->ibs_sent_wakes
);
564 debugfs_create_u64("ibs_sent_wake_acks", mode
, ibs_dir
,
565 &qca
->ibs_sent_wacks
);
566 debugfs_create_u64("ibs_recv_sleeps", mode
, ibs_dir
,
567 &qca
->ibs_recv_slps
);
568 debugfs_create_u64("ibs_recv_wakes", mode
, ibs_dir
,
569 &qca
->ibs_recv_wakes
);
570 debugfs_create_u64("ibs_recv_wake_acks", mode
, ibs_dir
,
571 &qca
->ibs_recv_wacks
);
572 debugfs_create_bool("tx_vote", mode
, ibs_dir
, &qca
->tx_vote
);
573 debugfs_create_u64("tx_votes_on", mode
, ibs_dir
, &qca
->tx_votes_on
);
574 debugfs_create_u64("tx_votes_off", mode
, ibs_dir
, &qca
->tx_votes_off
);
575 debugfs_create_bool("rx_vote", mode
, ibs_dir
, &qca
->rx_vote
);
576 debugfs_create_u64("rx_votes_on", mode
, ibs_dir
, &qca
->rx_votes_on
);
577 debugfs_create_u64("rx_votes_off", mode
, ibs_dir
, &qca
->rx_votes_off
);
578 debugfs_create_u64("votes_on", mode
, ibs_dir
, &qca
->votes_on
);
579 debugfs_create_u64("votes_off", mode
, ibs_dir
, &qca
->votes_off
);
580 debugfs_create_u32("vote_on_ms", mode
, ibs_dir
, &qca
->vote_on_ms
);
581 debugfs_create_u32("vote_off_ms", mode
, ibs_dir
, &qca
->vote_off_ms
);
584 mode
= S_IRUGO
| S_IWUSR
;
585 debugfs_create_u32("wake_retrans", mode
, ibs_dir
, &qca
->wake_retrans
);
586 debugfs_create_u32("tx_idle_delay", mode
, ibs_dir
,
587 &qca
->tx_idle_delay
);
590 /* Flush protocol data */
591 static int qca_flush(struct hci_uart
*hu
)
593 struct qca_data
*qca
= hu
->priv
;
595 BT_DBG("hu %p qca flush", hu
);
597 skb_queue_purge(&qca
->tx_wait_q
);
598 skb_queue_purge(&qca
->txq
);
604 static int qca_close(struct hci_uart
*hu
)
606 struct qca_serdev
*qcadev
;
607 struct qca_data
*qca
= hu
->priv
;
609 BT_DBG("hu %p qca close", hu
);
611 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE
, hu
);
613 skb_queue_purge(&qca
->tx_wait_q
);
614 skb_queue_purge(&qca
->txq
);
615 del_timer(&qca
->tx_idle_timer
);
616 del_timer(&qca
->wake_retrans_timer
);
617 destroy_workqueue(qca
->workqueue
);
621 qcadev
= serdev_device_get_drvdata(hu
->serdev
);
622 if (qca_is_wcn399x(qcadev
->btsoc_type
))
623 qca_power_shutdown(hu
);
625 gpiod_set_value_cansleep(qcadev
->bt_en
, 0);
629 kfree_skb(qca
->rx_skb
);
638 /* Called upon a wake-up-indication from the device.
640 static void device_want_to_wakeup(struct hci_uart
*hu
)
643 struct qca_data
*qca
= hu
->priv
;
645 BT_DBG("hu %p want to wake up", hu
);
647 spin_lock_irqsave(&qca
->hci_ibs_lock
, flags
);
649 qca
->ibs_recv_wakes
++;
651 switch (qca
->rx_ibs_state
) {
652 case HCI_IBS_RX_ASLEEP
:
653 /* Make sure clock is on - we may have turned clock off since
654 * receiving the wake up indicator awake rx clock.
656 queue_work(qca
->workqueue
, &qca
->ws_awake_rx
);
657 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
660 case HCI_IBS_RX_AWAKE
:
661 /* Always acknowledge device wake up,
662 * sending IBS message doesn't count as TX ON.
664 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK
, hu
) < 0) {
665 BT_ERR("Failed to acknowledge device wake up");
668 qca
->ibs_sent_wacks
++;
672 /* Any other state is illegal */
673 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
678 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
680 /* Actually send the packets */
681 hci_uart_tx_wakeup(hu
);
684 /* Called upon a sleep-indication from the device.
686 static void device_want_to_sleep(struct hci_uart
*hu
)
689 struct qca_data
*qca
= hu
->priv
;
691 BT_DBG("hu %p want to sleep in %d state", hu
, qca
->rx_ibs_state
);
693 spin_lock_irqsave(&qca
->hci_ibs_lock
, flags
);
695 qca
->ibs_recv_slps
++;
697 switch (qca
->rx_ibs_state
) {
698 case HCI_IBS_RX_AWAKE
:
700 qca
->rx_ibs_state
= HCI_IBS_RX_ASLEEP
;
701 /* Vote off rx clock under workqueue */
702 queue_work(qca
->workqueue
, &qca
->ws_rx_vote_off
);
705 case HCI_IBS_RX_ASLEEP
:
709 /* Any other state is illegal */
710 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
715 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
718 /* Called upon wake-up-acknowledgement from the device
720 static void device_woke_up(struct hci_uart
*hu
)
722 unsigned long flags
, idle_delay
;
723 struct qca_data
*qca
= hu
->priv
;
724 struct sk_buff
*skb
= NULL
;
726 BT_DBG("hu %p woke up", hu
);
728 spin_lock_irqsave(&qca
->hci_ibs_lock
, flags
);
730 qca
->ibs_recv_wacks
++;
732 switch (qca
->tx_ibs_state
) {
733 case HCI_IBS_TX_AWAKE
:
734 /* Expect one if we send 2 WAKEs */
735 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
739 case HCI_IBS_TX_WAKING
:
740 /* Send pending packets */
741 while ((skb
= skb_dequeue(&qca
->tx_wait_q
)))
742 skb_queue_tail(&qca
->txq
, skb
);
744 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
745 del_timer(&qca
->wake_retrans_timer
);
746 idle_delay
= msecs_to_jiffies(qca
->tx_idle_delay
);
747 mod_timer(&qca
->tx_idle_timer
, jiffies
+ idle_delay
);
748 qca
->tx_ibs_state
= HCI_IBS_TX_AWAKE
;
751 case HCI_IBS_TX_ASLEEP
:
755 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
760 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
762 /* Actually send the packets */
763 hci_uart_tx_wakeup(hu
);
766 /* Enqueue frame for transmittion (padding, crc, etc) may be called from
767 * two simultaneous tasklets.
769 static int qca_enqueue(struct hci_uart
*hu
, struct sk_buff
*skb
)
771 unsigned long flags
= 0, idle_delay
;
772 struct qca_data
*qca
= hu
->priv
;
774 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu
, skb
,
777 /* Prepend skb with frame type */
778 memcpy(skb_push(skb
, 1), &hci_skb_pkt_type(skb
), 1);
780 spin_lock_irqsave(&qca
->hci_ibs_lock
, flags
);
782 /* Don't go to sleep in middle of patch download or
783 * Out-Of-Band(GPIOs control) sleep is selected.
785 if (!test_bit(QCA_IBS_ENABLED
, &qca
->flags
)) {
786 skb_queue_tail(&qca
->txq
, skb
);
787 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
791 /* Act according to current state */
792 switch (qca
->tx_ibs_state
) {
793 case HCI_IBS_TX_AWAKE
:
794 BT_DBG("Device awake, sending normally");
795 skb_queue_tail(&qca
->txq
, skb
);
796 idle_delay
= msecs_to_jiffies(qca
->tx_idle_delay
);
797 mod_timer(&qca
->tx_idle_timer
, jiffies
+ idle_delay
);
800 case HCI_IBS_TX_ASLEEP
:
801 BT_DBG("Device asleep, waking up and queueing packet");
802 /* Save packet for later */
803 skb_queue_tail(&qca
->tx_wait_q
, skb
);
805 qca
->tx_ibs_state
= HCI_IBS_TX_WAKING
;
806 /* Schedule a work queue to wake up device */
807 queue_work(qca
->workqueue
, &qca
->ws_awake_device
);
810 case HCI_IBS_TX_WAKING
:
811 BT_DBG("Device waking up, queueing packet");
812 /* Transient state; just keep packet for later */
813 skb_queue_tail(&qca
->tx_wait_q
, skb
);
817 BT_ERR("Illegal tx state: %d (losing packet)",
823 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
828 static int qca_ibs_sleep_ind(struct hci_dev
*hdev
, struct sk_buff
*skb
)
830 struct hci_uart
*hu
= hci_get_drvdata(hdev
);
832 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu
, HCI_IBS_SLEEP_IND
);
834 device_want_to_sleep(hu
);
840 static int qca_ibs_wake_ind(struct hci_dev
*hdev
, struct sk_buff
*skb
)
842 struct hci_uart
*hu
= hci_get_drvdata(hdev
);
844 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu
, HCI_IBS_WAKE_IND
);
846 device_want_to_wakeup(hu
);
852 static int qca_ibs_wake_ack(struct hci_dev
*hdev
, struct sk_buff
*skb
)
854 struct hci_uart
*hu
= hci_get_drvdata(hdev
);
856 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu
, HCI_IBS_WAKE_ACK
);
864 static int qca_recv_acl_data(struct hci_dev
*hdev
, struct sk_buff
*skb
)
866 /* We receive debug logs from chip as an ACL packets.
867 * Instead of sending the data to ACL to decode the
868 * received data, we are pushing them to the above layers
869 * as a diagnostic packet.
871 if (get_unaligned_le16(skb
->data
) == QCA_DEBUG_HANDLE
)
872 return hci_recv_diag(hdev
, skb
);
874 return hci_recv_frame(hdev
, skb
);
877 static int qca_recv_event(struct hci_dev
*hdev
, struct sk_buff
*skb
)
879 struct hci_uart
*hu
= hci_get_drvdata(hdev
);
880 struct qca_data
*qca
= hu
->priv
;
882 if (test_bit(QCA_DROP_VENDOR_EVENT
, &qca
->flags
)) {
883 struct hci_event_hdr
*hdr
= (void *)skb
->data
;
885 /* For the WCN3990 the vendor command for a baudrate change
886 * isn't sent as synchronous HCI command, because the
887 * controller sends the corresponding vendor event with the
888 * new baudrate. The event is received and properly decoded
889 * after changing the baudrate of the host port. It needs to
890 * be dropped, otherwise it can be misinterpreted as
891 * response to a later firmware download command (also a
895 if (hdr
->evt
== HCI_EV_VENDOR
)
896 complete(&qca
->drop_ev_comp
);
903 return hci_recv_frame(hdev
, skb
);
906 #define QCA_IBS_SLEEP_IND_EVENT \
907 .type = HCI_IBS_SLEEP_IND, \
911 .maxlen = HCI_MAX_IBS_SIZE
913 #define QCA_IBS_WAKE_IND_EVENT \
914 .type = HCI_IBS_WAKE_IND, \
918 .maxlen = HCI_MAX_IBS_SIZE
920 #define QCA_IBS_WAKE_ACK_EVENT \
921 .type = HCI_IBS_WAKE_ACK, \
925 .maxlen = HCI_MAX_IBS_SIZE
927 static const struct h4_recv_pkt qca_recv_pkts
[] = {
928 { H4_RECV_ACL
, .recv
= qca_recv_acl_data
},
929 { H4_RECV_SCO
, .recv
= hci_recv_frame
},
930 { H4_RECV_EVENT
, .recv
= qca_recv_event
},
931 { QCA_IBS_WAKE_IND_EVENT
, .recv
= qca_ibs_wake_ind
},
932 { QCA_IBS_WAKE_ACK_EVENT
, .recv
= qca_ibs_wake_ack
},
933 { QCA_IBS_SLEEP_IND_EVENT
, .recv
= qca_ibs_sleep_ind
},
936 static int qca_recv(struct hci_uart
*hu
, const void *data
, int count
)
938 struct qca_data
*qca
= hu
->priv
;
940 if (!test_bit(HCI_UART_REGISTERED
, &hu
->flags
))
943 qca
->rx_skb
= h4_recv_buf(hu
->hdev
, qca
->rx_skb
, data
, count
,
944 qca_recv_pkts
, ARRAY_SIZE(qca_recv_pkts
));
945 if (IS_ERR(qca
->rx_skb
)) {
946 int err
= PTR_ERR(qca
->rx_skb
);
947 bt_dev_err(hu
->hdev
, "Frame reassembly failed (%d)", err
);
955 static struct sk_buff
*qca_dequeue(struct hci_uart
*hu
)
957 struct qca_data
*qca
= hu
->priv
;
959 return skb_dequeue(&qca
->txq
);
962 static uint8_t qca_get_baudrate_value(int speed
)
966 return QCA_BAUDRATE_9600
;
968 return QCA_BAUDRATE_19200
;
970 return QCA_BAUDRATE_38400
;
972 return QCA_BAUDRATE_57600
;
974 return QCA_BAUDRATE_115200
;
976 return QCA_BAUDRATE_230400
;
978 return QCA_BAUDRATE_460800
;
980 return QCA_BAUDRATE_500000
;
982 return QCA_BAUDRATE_921600
;
984 return QCA_BAUDRATE_1000000
;
986 return QCA_BAUDRATE_2000000
;
988 return QCA_BAUDRATE_3000000
;
990 return QCA_BAUDRATE_3200000
;
992 return QCA_BAUDRATE_3500000
;
994 return QCA_BAUDRATE_115200
;
998 static int qca_set_baudrate(struct hci_dev
*hdev
, uint8_t baudrate
)
1000 struct hci_uart
*hu
= hci_get_drvdata(hdev
);
1001 struct qca_data
*qca
= hu
->priv
;
1002 struct sk_buff
*skb
;
1003 u8 cmd
[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
1005 if (baudrate
> QCA_BAUDRATE_3200000
)
1010 skb
= bt_skb_alloc(sizeof(cmd
), GFP_KERNEL
);
1012 bt_dev_err(hdev
, "Failed to allocate baudrate packet");
1016 /* Assign commands to change baudrate and packet type. */
1017 skb_put_data(skb
, cmd
, sizeof(cmd
));
1018 hci_skb_pkt_type(skb
) = HCI_COMMAND_PKT
;
1020 skb_queue_tail(&qca
->txq
, skb
);
1021 hci_uart_tx_wakeup(hu
);
1023 /* Wait for the baudrate change request to be sent */
1025 while (!skb_queue_empty(&qca
->txq
))
1026 usleep_range(100, 200);
1029 serdev_device_wait_until_sent(hu
->serdev
,
1030 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS
));
1032 /* Give the controller time to process the request */
1033 if (qca_is_wcn399x(qca_soc_type(hu
)))
1041 static inline void host_set_baudrate(struct hci_uart
*hu
, unsigned int speed
)
1044 serdev_device_set_baudrate(hu
->serdev
, speed
);
1046 hci_uart_set_baudrate(hu
, speed
);
1049 static int qca_send_power_pulse(struct hci_uart
*hu
, bool on
)
1052 int timeout
= msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS
);
1053 u8 cmd
= on
? QCA_WCN3990_POWERON_PULSE
: QCA_WCN3990_POWEROFF_PULSE
;
1055 /* These power pulses are single byte command which are sent
1056 * at required baudrate to wcn3990. On wcn3990, we have an external
1057 * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1058 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1059 * and also we use the same power inputs to turn on and off for
1060 * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1061 * we send a power on pulse at 115200 bps. This algorithm will help to
1062 * save power. Disabling hardware flow control is mandatory while
1063 * sending power pulses to SoC.
1065 bt_dev_dbg(hu
->hdev
, "sending power pulse %02x to controller", cmd
);
1067 serdev_device_write_flush(hu
->serdev
);
1068 hci_uart_set_flow_control(hu
, true);
1069 ret
= serdev_device_write_buf(hu
->serdev
, &cmd
, sizeof(cmd
));
1071 bt_dev_err(hu
->hdev
, "failed to send power pulse %02x", cmd
);
1075 serdev_device_wait_until_sent(hu
->serdev
, timeout
);
1076 hci_uart_set_flow_control(hu
, false);
1078 /* Give to controller time to boot/shutdown */
1087 static unsigned int qca_get_speed(struct hci_uart
*hu
,
1088 enum qca_speed_type speed_type
)
1090 unsigned int speed
= 0;
1092 if (speed_type
== QCA_INIT_SPEED
) {
1094 speed
= hu
->init_speed
;
1095 else if (hu
->proto
->init_speed
)
1096 speed
= hu
->proto
->init_speed
;
1099 speed
= hu
->oper_speed
;
1100 else if (hu
->proto
->oper_speed
)
1101 speed
= hu
->proto
->oper_speed
;
1107 static int qca_check_speeds(struct hci_uart
*hu
)
1109 if (qca_is_wcn399x(qca_soc_type(hu
))) {
1110 if (!qca_get_speed(hu
, QCA_INIT_SPEED
) &&
1111 !qca_get_speed(hu
, QCA_OPER_SPEED
))
1114 if (!qca_get_speed(hu
, QCA_INIT_SPEED
) ||
1115 !qca_get_speed(hu
, QCA_OPER_SPEED
))
1122 static int qca_set_speed(struct hci_uart
*hu
, enum qca_speed_type speed_type
)
1124 unsigned int speed
, qca_baudrate
;
1125 struct qca_data
*qca
= hu
->priv
;
1128 if (speed_type
== QCA_INIT_SPEED
) {
1129 speed
= qca_get_speed(hu
, QCA_INIT_SPEED
);
1131 host_set_baudrate(hu
, speed
);
1133 enum qca_btsoc_type soc_type
= qca_soc_type(hu
);
1135 speed
= qca_get_speed(hu
, QCA_OPER_SPEED
);
1139 /* Disable flow control for wcn3990 to deassert RTS while
1140 * changing the baudrate of chip and host.
1142 if (qca_is_wcn399x(soc_type
))
1143 hci_uart_set_flow_control(hu
, true);
1145 if (soc_type
== QCA_WCN3990
) {
1146 reinit_completion(&qca
->drop_ev_comp
);
1147 set_bit(QCA_DROP_VENDOR_EVENT
, &qca
->flags
);
1150 qca_baudrate
= qca_get_baudrate_value(speed
);
1151 bt_dev_dbg(hu
->hdev
, "Set UART speed to %d", speed
);
1152 ret
= qca_set_baudrate(hu
->hdev
, qca_baudrate
);
1156 host_set_baudrate(hu
, speed
);
1159 if (qca_is_wcn399x(soc_type
))
1160 hci_uart_set_flow_control(hu
, false);
1162 if (soc_type
== QCA_WCN3990
) {
1163 /* Wait for the controller to send the vendor event
1164 * for the baudrate change command.
1166 if (!wait_for_completion_timeout(&qca
->drop_ev_comp
,
1167 msecs_to_jiffies(100))) {
1168 bt_dev_err(hu
->hdev
,
1169 "Failed to change controller baudrate\n");
1173 clear_bit(QCA_DROP_VENDOR_EVENT
, &qca
->flags
);
1180 static int qca_wcn3990_init(struct hci_uart
*hu
)
1182 struct qca_serdev
*qcadev
;
1185 /* Check for vregs status, may be hci down has turned
1186 * off the voltage regulator.
1188 qcadev
= serdev_device_get_drvdata(hu
->serdev
);
1189 if (!qcadev
->bt_power
->vregs_on
) {
1190 serdev_device_close(hu
->serdev
);
1191 ret
= qca_power_setup(hu
, true);
1195 ret
= serdev_device_open(hu
->serdev
);
1197 bt_dev_err(hu
->hdev
, "failed to open port");
1202 /* Forcefully enable wcn3990 to enter in to boot mode. */
1203 host_set_baudrate(hu
, 2400);
1204 ret
= qca_send_power_pulse(hu
, false);
1208 qca_set_speed(hu
, QCA_INIT_SPEED
);
1209 ret
= qca_send_power_pulse(hu
, true);
1213 /* Now the device is in ready state to communicate with host.
1214 * To sync host with device we need to reopen port.
1215 * Without this, we will have RTS and CTS synchronization
1218 serdev_device_close(hu
->serdev
);
1219 ret
= serdev_device_open(hu
->serdev
);
1221 bt_dev_err(hu
->hdev
, "failed to open port");
1225 hci_uart_set_flow_control(hu
, false);
1230 static int qca_setup(struct hci_uart
*hu
)
1232 struct hci_dev
*hdev
= hu
->hdev
;
1233 struct qca_data
*qca
= hu
->priv
;
1234 unsigned int speed
, qca_baudrate
= QCA_BAUDRATE_115200
;
1235 enum qca_btsoc_type soc_type
= qca_soc_type(hu
);
1236 const char *firmware_name
= qca_get_firmware_name(hu
);
1240 ret
= qca_check_speeds(hu
);
1244 /* Patch downloading has to be done without IBS mode */
1245 clear_bit(QCA_IBS_ENABLED
, &qca
->flags
);
1247 /* Enable controller to do both LE scan and BR/EDR inquiry
1250 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY
, &hdev
->quirks
);
1252 if (qca_is_wcn399x(soc_type
)) {
1253 bt_dev_info(hdev
, "setting up wcn3990");
1255 /* Enable NON_PERSISTENT_SETUP QUIRK to ensure to execute
1256 * setup for every hci up.
1258 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP
, &hdev
->quirks
);
1259 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY
, &hdev
->quirks
);
1260 hu
->hdev
->shutdown
= qca_power_off
;
1261 ret
= qca_wcn3990_init(hu
);
1265 ret
= qca_read_soc_version(hdev
, &soc_ver
);
1269 bt_dev_info(hdev
, "ROME setup");
1270 qca_set_speed(hu
, QCA_INIT_SPEED
);
1273 /* Setup user speed if needed */
1274 speed
= qca_get_speed(hu
, QCA_OPER_SPEED
);
1276 ret
= qca_set_speed(hu
, QCA_OPER_SPEED
);
1280 qca_baudrate
= qca_get_baudrate_value(speed
);
1283 if (!qca_is_wcn399x(soc_type
)) {
1284 /* Get QCA version information */
1285 ret
= qca_read_soc_version(hdev
, &soc_ver
);
1290 bt_dev_info(hdev
, "QCA controller version 0x%08x", soc_ver
);
1291 /* Setup patch / NVM configurations */
1292 ret
= qca_uart_setup(hdev
, qca_baudrate
, soc_type
, soc_ver
,
1295 set_bit(QCA_IBS_ENABLED
, &qca
->flags
);
1296 qca_debugfs_init(hdev
);
1297 } else if (ret
== -ENOENT
) {
1298 /* No patch/nvm-config found, run with original fw/config */
1300 } else if (ret
== -EAGAIN
) {
1302 * Userspace firmware loader will return -EAGAIN in case no
1303 * patch/nvm-config is found, so run with original fw/config.
1309 if (qca_is_wcn399x(soc_type
))
1310 hu
->hdev
->set_bdaddr
= qca_set_bdaddr
;
1312 hu
->hdev
->set_bdaddr
= qca_set_bdaddr_rome
;
1317 static const struct hci_uart_proto qca_proto
= {
1321 .init_speed
= 115200,
1322 .oper_speed
= 3000000,
1328 .enqueue
= qca_enqueue
,
1329 .dequeue
= qca_dequeue
,
1332 static const struct qca_vreg_data qca_soc_data_wcn3990
= {
1333 .soc_type
= QCA_WCN3990
,
1334 .vregs
= (struct qca_vreg
[]) {
1335 { "vddio", 1800000, 1900000, 15000 },
1336 { "vddxo", 1800000, 1900000, 80000 },
1337 { "vddrf", 1300000, 1350000, 300000 },
1338 { "vddch0", 3300000, 3400000, 450000 },
1343 static const struct qca_vreg_data qca_soc_data_wcn3998
= {
1344 .soc_type
= QCA_WCN3998
,
1345 .vregs
= (struct qca_vreg
[]) {
1346 { "vddio", 1800000, 1900000, 10000 },
1347 { "vddxo", 1800000, 1900000, 80000 },
1348 { "vddrf", 1300000, 1352000, 300000 },
1349 { "vddch0", 3300000, 3300000, 450000 },
1354 static void qca_power_shutdown(struct hci_uart
*hu
)
1356 struct qca_data
*qca
= hu
->priv
;
1357 unsigned long flags
;
1359 /* From this point we go into power off state. But serial port is
1360 * still open, stop queueing the IBS data and flush all the buffered
1363 spin_lock_irqsave(&qca
->hci_ibs_lock
, flags
);
1364 clear_bit(QCA_IBS_ENABLED
, &qca
->flags
);
1366 spin_unlock_irqrestore(&qca
->hci_ibs_lock
, flags
);
1368 host_set_baudrate(hu
, 2400);
1369 qca_send_power_pulse(hu
, false);
1370 qca_power_setup(hu
, false);
1373 static int qca_power_off(struct hci_dev
*hdev
)
1375 struct hci_uart
*hu
= hci_get_drvdata(hdev
);
1377 /* Perform pre shutdown command */
1378 qca_send_pre_shutdown_cmd(hdev
);
1380 usleep_range(8000, 10000);
1382 qca_power_shutdown(hu
);
1386 static int qca_enable_regulator(struct qca_vreg vregs
,
1387 struct regulator
*regulator
)
1391 ret
= regulator_set_voltage(regulator
, vregs
.min_uV
,
1397 ret
= regulator_set_load(regulator
,
1403 return regulator_enable(regulator
);
1407 static void qca_disable_regulator(struct qca_vreg vregs
,
1408 struct regulator
*regulator
)
1410 regulator_disable(regulator
);
1411 regulator_set_voltage(regulator
, 0, vregs
.max_uV
);
1413 regulator_set_load(regulator
, 0);
1417 static int qca_power_setup(struct hci_uart
*hu
, bool on
)
1419 struct qca_vreg
*vregs
;
1420 struct regulator_bulk_data
*vreg_bulk
;
1421 struct qca_serdev
*qcadev
;
1422 int i
, num_vregs
, ret
= 0;
1424 qcadev
= serdev_device_get_drvdata(hu
->serdev
);
1425 if (!qcadev
|| !qcadev
->bt_power
|| !qcadev
->bt_power
->vreg_data
||
1426 !qcadev
->bt_power
->vreg_bulk
)
1429 vregs
= qcadev
->bt_power
->vreg_data
->vregs
;
1430 vreg_bulk
= qcadev
->bt_power
->vreg_bulk
;
1431 num_vregs
= qcadev
->bt_power
->vreg_data
->num_vregs
;
1432 BT_DBG("on: %d", on
);
1433 if (on
&& !qcadev
->bt_power
->vregs_on
) {
1434 for (i
= 0; i
< num_vregs
; i
++) {
1435 ret
= qca_enable_regulator(vregs
[i
],
1436 vreg_bulk
[i
].consumer
);
1442 BT_ERR("failed to enable regulator:%s", vregs
[i
].name
);
1443 /* turn off regulators which are enabled */
1444 for (i
= i
- 1; i
>= 0; i
--)
1445 qca_disable_regulator(vregs
[i
],
1446 vreg_bulk
[i
].consumer
);
1448 qcadev
->bt_power
->vregs_on
= true;
1450 } else if (!on
&& qcadev
->bt_power
->vregs_on
) {
1451 /* turn off regulator in reverse order */
1452 i
= qcadev
->bt_power
->vreg_data
->num_vregs
- 1;
1453 for ( ; i
>= 0; i
--)
1454 qca_disable_regulator(vregs
[i
], vreg_bulk
[i
].consumer
);
1456 qcadev
->bt_power
->vregs_on
= false;
1462 static int qca_init_regulators(struct qca_power
*qca
,
1463 const struct qca_vreg
*vregs
, size_t num_vregs
)
1467 qca
->vreg_bulk
= devm_kcalloc(qca
->dev
, num_vregs
,
1468 sizeof(struct regulator_bulk_data
),
1470 if (!qca
->vreg_bulk
)
1473 for (i
= 0; i
< num_vregs
; i
++)
1474 qca
->vreg_bulk
[i
].supply
= vregs
[i
].name
;
1476 return devm_regulator_bulk_get(qca
->dev
, num_vregs
, qca
->vreg_bulk
);
1479 static int qca_serdev_probe(struct serdev_device
*serdev
)
1481 struct qca_serdev
*qcadev
;
1482 const struct qca_vreg_data
*data
;
1485 qcadev
= devm_kzalloc(&serdev
->dev
, sizeof(*qcadev
), GFP_KERNEL
);
1489 qcadev
->serdev_hu
.serdev
= serdev
;
1490 data
= of_device_get_match_data(&serdev
->dev
);
1491 serdev_device_set_drvdata(serdev
, qcadev
);
1492 device_property_read_string(&serdev
->dev
, "firmware-name",
1493 &qcadev
->firmware_name
);
1494 if (data
&& qca_is_wcn399x(data
->soc_type
)) {
1495 qcadev
->btsoc_type
= data
->soc_type
;
1496 qcadev
->bt_power
= devm_kzalloc(&serdev
->dev
,
1497 sizeof(struct qca_power
),
1499 if (!qcadev
->bt_power
)
1502 qcadev
->bt_power
->dev
= &serdev
->dev
;
1503 qcadev
->bt_power
->vreg_data
= data
;
1504 err
= qca_init_regulators(qcadev
->bt_power
, data
->vregs
,
1507 BT_ERR("Failed to init regulators:%d", err
);
1511 qcadev
->bt_power
->vregs_on
= false;
1513 device_property_read_u32(&serdev
->dev
, "max-speed",
1514 &qcadev
->oper_speed
);
1515 if (!qcadev
->oper_speed
)
1516 BT_DBG("UART will pick default operating speed");
1518 err
= hci_uart_register_device(&qcadev
->serdev_hu
, &qca_proto
);
1520 BT_ERR("wcn3990 serdev registration failed");
1524 qcadev
->btsoc_type
= QCA_ROME
;
1525 qcadev
->bt_en
= devm_gpiod_get(&serdev
->dev
, "enable",
1527 if (IS_ERR(qcadev
->bt_en
)) {
1528 dev_err(&serdev
->dev
, "failed to acquire enable gpio\n");
1529 return PTR_ERR(qcadev
->bt_en
);
1532 qcadev
->susclk
= devm_clk_get(&serdev
->dev
, NULL
);
1533 if (IS_ERR(qcadev
->susclk
)) {
1534 dev_err(&serdev
->dev
, "failed to acquire clk\n");
1535 return PTR_ERR(qcadev
->susclk
);
1538 err
= clk_set_rate(qcadev
->susclk
, SUSCLK_RATE_32KHZ
);
1542 err
= clk_prepare_enable(qcadev
->susclk
);
1546 err
= hci_uart_register_device(&qcadev
->serdev_hu
, &qca_proto
);
1548 clk_disable_unprepare(qcadev
->susclk
);
1555 static void qca_serdev_remove(struct serdev_device
*serdev
)
1557 struct qca_serdev
*qcadev
= serdev_device_get_drvdata(serdev
);
1559 if (qca_is_wcn399x(qcadev
->btsoc_type
))
1560 qca_power_shutdown(&qcadev
->serdev_hu
);
1562 clk_disable_unprepare(qcadev
->susclk
);
1564 hci_uart_unregister_device(&qcadev
->serdev_hu
);
1567 static const struct of_device_id qca_bluetooth_of_match
[] = {
1568 { .compatible
= "qcom,qca6174-bt" },
1569 { .compatible
= "qcom,wcn3990-bt", .data
= &qca_soc_data_wcn3990
},
1570 { .compatible
= "qcom,wcn3998-bt", .data
= &qca_soc_data_wcn3998
},
1573 MODULE_DEVICE_TABLE(of
, qca_bluetooth_of_match
);
1575 static struct serdev_device_driver qca_serdev_driver
= {
1576 .probe
= qca_serdev_probe
,
1577 .remove
= qca_serdev_remove
,
1579 .name
= "hci_uart_qca",
1580 .of_match_table
= qca_bluetooth_of_match
,
1584 int __init
qca_init(void)
1586 serdev_device_driver_register(&qca_serdev_driver
);
1588 return hci_uart_register_proto(&qca_proto
);
1591 int __exit
qca_deinit(void)
1593 serdev_device_driver_unregister(&qca_serdev_driver
);
1595 return hci_uart_unregister_proto(&qca_proto
);