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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / bluetooth / hci_qca.c
blob4a963682c70215d1b9274e1ff495c7c544463b6e
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Bluetooth Software UART Qualcomm protocol
4 *
5 * HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management
6 * protocol extension to H4.
7 *
8 * Copyright (C) 2007 Texas Instruments, Inc.
9 * Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved.
10 *
11 * Acknowledgements:
12 * This file is based on hci_ll.c, which was...
13 * Written by Ohad Ben-Cohen <ohad@bencohen.org>
14 * which was in turn based on hci_h4.c, which was written
15 * by Maxim Krasnyansky and Marcel Holtmann.
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/clk.h>
20 #include <linux/completion.h>
21 #include <linux/debugfs.h>
22 #include <linux/delay.h>
23 #include <linux/devcoredump.h>
24 #include <linux/device.h>
25 #include <linux/gpio/consumer.h>
26 #include <linux/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>
35
36 #include <net/bluetooth/bluetooth.h>
37 #include <net/bluetooth/hci_core.h>
38
39 #include "hci_uart.h"
40 #include "btqca.h"
41
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
47
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 (MEMDUMP_TIMEOUT_MS + 1000)
54 #define FW_DOWNLOAD_TIMEOUT_MS 3000
55
56 /* susclk rate */
57 #define SUSCLK_RATE_32KHZ 32768
58
59 /* Controller debug log header */
60 #define QCA_DEBUG_HANDLE 0x2EDC
61
62 /* max retry count when init fails */
63 #define MAX_INIT_RETRIES 3
64
65 /* Controller dump header */
66 #define QCA_SSR_DUMP_HANDLE 0x0108
67 #define QCA_DUMP_PACKET_SIZE 255
68 #define QCA_LAST_SEQUENCE_NUM 0xFFFF
69 #define QCA_CRASHBYTE_PACKET_LEN 1096
70 #define QCA_MEMDUMP_BYTE 0xFB
71
72 enum qca_flags {
73 QCA_IBS_DISABLED,
74 QCA_DROP_VENDOR_EVENT,
75 QCA_SUSPENDING,
76 QCA_MEMDUMP_COLLECTION,
77 QCA_HW_ERROR_EVENT,
78 QCA_SSR_TRIGGERED,
79 QCA_BT_OFF
80 };
81
82 enum qca_capabilities {
83 QCA_CAP_WIDEBAND_SPEECH = BIT(0),
84 QCA_CAP_VALID_LE_STATES = BIT(1),
85 };
86
87 /* HCI_IBS transmit side sleep protocol states */
88 enum tx_ibs_states {
89 HCI_IBS_TX_ASLEEP,
90 HCI_IBS_TX_WAKING,
91 HCI_IBS_TX_AWAKE,
92 };
93
94 /* HCI_IBS receive side sleep protocol states */
95 enum rx_states {
96 HCI_IBS_RX_ASLEEP,
97 HCI_IBS_RX_AWAKE,
98 };
99
100 /* HCI_IBS transmit and receive side clock state vote */
101 enum hci_ibs_clock_state_vote {
102 HCI_IBS_VOTE_STATS_UPDATE,
103 HCI_IBS_TX_VOTE_CLOCK_ON,
104 HCI_IBS_TX_VOTE_CLOCK_OFF,
105 HCI_IBS_RX_VOTE_CLOCK_ON,
106 HCI_IBS_RX_VOTE_CLOCK_OFF,
107 };
108
109 /* Controller memory dump states */
110 enum qca_memdump_states {
111 QCA_MEMDUMP_IDLE,
112 QCA_MEMDUMP_COLLECTING,
113 QCA_MEMDUMP_COLLECTED,
114 QCA_MEMDUMP_TIMEOUT,
115 };
116
117 struct qca_memdump_data {
118 char *memdump_buf_head;
119 char *memdump_buf_tail;
120 u32 current_seq_no;
121 u32 received_dump;
122 u32 ram_dump_size;
123 };
124
125 struct qca_memdump_event_hdr {
126 __u8 evt;
127 __u8 plen;
128 __u16 opcode;
129 __u16 seq_no;
130 __u8 reserved;
131 } __packed;
132
133
134 struct qca_dump_size {
135 u32 dump_size;
136 } __packed;
137
138 struct qca_data {
139 struct hci_uart *hu;
140 struct sk_buff *rx_skb;
141 struct sk_buff_head txq;
142 struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */
143 struct sk_buff_head rx_memdump_q; /* Memdump wait queue */
144 spinlock_t hci_ibs_lock; /* HCI_IBS state lock */
145 u8 tx_ibs_state; /* HCI_IBS transmit side power state*/
146 u8 rx_ibs_state; /* HCI_IBS receive side power state */
147 bool tx_vote; /* Clock must be on for TX */
148 bool rx_vote; /* Clock must be on for RX */
149 struct timer_list tx_idle_timer;
150 u32 tx_idle_delay;
151 struct timer_list wake_retrans_timer;
152 u32 wake_retrans;
153 struct workqueue_struct *workqueue;
154 struct work_struct ws_awake_rx;
155 struct work_struct ws_awake_device;
156 struct work_struct ws_rx_vote_off;
157 struct work_struct ws_tx_vote_off;
158 struct work_struct ctrl_memdump_evt;
159 struct delayed_work ctrl_memdump_timeout;
160 struct qca_memdump_data *qca_memdump;
161 unsigned long flags;
162 struct completion drop_ev_comp;
163 wait_queue_head_t suspend_wait_q;
164 enum qca_memdump_states memdump_state;
165 struct mutex hci_memdump_lock;
166
167 /* For debugging purpose */
168 u64 ibs_sent_wacks;
169 u64 ibs_sent_slps;
170 u64 ibs_sent_wakes;
171 u64 ibs_recv_wacks;
172 u64 ibs_recv_slps;
173 u64 ibs_recv_wakes;
174 u64 vote_last_jif;
175 u32 vote_on_ms;
176 u32 vote_off_ms;
177 u64 tx_votes_on;
178 u64 rx_votes_on;
179 u64 tx_votes_off;
180 u64 rx_votes_off;
181 u64 votes_on;
182 u64 votes_off;
183 };
184
185 enum qca_speed_type {
186 QCA_INIT_SPEED = 1,
187 QCA_OPER_SPEED
188 };
189
190 /*
191 * Voltage regulator information required for configuring the
192 * QCA Bluetooth chipset
193 */
194 struct qca_vreg {
195 const char *name;
196 unsigned int load_uA;
197 };
198
199 struct qca_device_data {
200 enum qca_btsoc_type soc_type;
201 struct qca_vreg *vregs;
202 size_t num_vregs;
203 uint32_t capabilities;
204 };
205
206 /*
207 * Platform data for the QCA Bluetooth power driver.
208 */
209 struct qca_power {
210 struct device *dev;
211 struct regulator_bulk_data *vreg_bulk;
212 int num_vregs;
213 bool vregs_on;
214 };
215
216 struct qca_serdev {
217 struct hci_uart serdev_hu;
218 struct gpio_desc *bt_en;
219 struct clk *susclk;
220 enum qca_btsoc_type btsoc_type;
221 struct qca_power *bt_power;
222 u32 init_speed;
223 u32 oper_speed;
224 const char *firmware_name;
225 };
226
227 static int qca_regulator_enable(struct qca_serdev *qcadev);
228 static void qca_regulator_disable(struct qca_serdev *qcadev);
229 static void qca_power_shutdown(struct hci_uart *hu);
230 static int qca_power_off(struct hci_dev *hdev);
231 static void qca_controller_memdump(struct work_struct *work);
232
233 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
234 {
235 enum qca_btsoc_type soc_type;
236
237 if (hu->serdev) {
238 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
239
240 soc_type = qsd->btsoc_type;
241 } else {
242 soc_type = QCA_ROME;
243 }
244
245 return soc_type;
246 }
247
248 static const char *qca_get_firmware_name(struct hci_uart *hu)
249 {
250 if (hu->serdev) {
251 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
252
253 return qsd->firmware_name;
254 } else {
255 return NULL;
256 }
257 }
258
259 static void __serial_clock_on(struct tty_struct *tty)
260 {
261 /* TODO: Some chipset requires to enable UART clock on client
262 * side to save power consumption or manual work is required.
263 * Please put your code to control UART clock here if needed
264 */
265 }
266
267 static void __serial_clock_off(struct tty_struct *tty)
268 {
269 /* TODO: Some chipset requires to disable UART clock on client
270 * side to save power consumption or manual work is required.
271 * Please put your code to control UART clock off here if needed
272 */
273 }
274
275 /* serial_clock_vote needs to be called with the ibs lock held */
276 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
277 {
278 struct qca_data *qca = hu->priv;
279 unsigned int diff;
280
281 bool old_vote = (qca->tx_vote | qca->rx_vote);
282 bool new_vote;
283
284 switch (vote) {
285 case HCI_IBS_VOTE_STATS_UPDATE:
286 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
287
288 if (old_vote)
289 qca->vote_off_ms += diff;
290 else
291 qca->vote_on_ms += diff;
292 return;
293
294 case HCI_IBS_TX_VOTE_CLOCK_ON:
295 qca->tx_vote = true;
296 qca->tx_votes_on++;
297 break;
298
299 case HCI_IBS_RX_VOTE_CLOCK_ON:
300 qca->rx_vote = true;
301 qca->rx_votes_on++;
302 break;
303
304 case HCI_IBS_TX_VOTE_CLOCK_OFF:
305 qca->tx_vote = false;
306 qca->tx_votes_off++;
307 break;
308
309 case HCI_IBS_RX_VOTE_CLOCK_OFF:
310 qca->rx_vote = false;
311 qca->rx_votes_off++;
312 break;
313
314 default:
315 BT_ERR("Voting irregularity");
316 return;
317 }
318
319 new_vote = qca->rx_vote | qca->tx_vote;
320
321 if (new_vote != old_vote) {
322 if (new_vote)
323 __serial_clock_on(hu->tty);
324 else
325 __serial_clock_off(hu->tty);
326
327 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
328 vote ? "true" : "false");
329
330 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
331
332 if (new_vote) {
333 qca->votes_on++;
334 qca->vote_off_ms += diff;
335 } else {
336 qca->votes_off++;
337 qca->vote_on_ms += diff;
338 }
339 qca->vote_last_jif = jiffies;
340 }
341 }
342
343 /* Builds and sends an HCI_IBS command packet.
344 * These are very simple packets with only 1 cmd byte.
345 */
346 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
347 {
348 int err = 0;
349 struct sk_buff *skb = NULL;
350 struct qca_data *qca = hu->priv;
351
352 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
353
354 skb = bt_skb_alloc(1, GFP_ATOMIC);
355 if (!skb) {
356 BT_ERR("Failed to allocate memory for HCI_IBS packet");
357 return -ENOMEM;
358 }
359
360 /* Assign HCI_IBS type */
361 skb_put_u8(skb, cmd);
362
363 skb_queue_tail(&qca->txq, skb);
364
365 return err;
366 }
367
368 static void qca_wq_awake_device(struct work_struct *work)
369 {
370 struct qca_data *qca = container_of(work, struct qca_data,
371 ws_awake_device);
372 struct hci_uart *hu = qca->hu;
373 unsigned long retrans_delay;
374 unsigned long flags;
375
376 BT_DBG("hu %p wq awake device", hu);
377
378 /* Vote for serial clock */
379 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
380
381 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
382
383 /* Send wake indication to device */
384 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
385 BT_ERR("Failed to send WAKE to device");
386
387 qca->ibs_sent_wakes++;
388
389 /* Start retransmit timer */
390 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
391 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
392
393 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
394
395 /* Actually send the packets */
396 hci_uart_tx_wakeup(hu);
397 }
398
399 static void qca_wq_awake_rx(struct work_struct *work)
400 {
401 struct qca_data *qca = container_of(work, struct qca_data,
402 ws_awake_rx);
403 struct hci_uart *hu = qca->hu;
404 unsigned long flags;
405
406 BT_DBG("hu %p wq awake rx", hu);
407
408 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
409
410 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
411 qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
412
413 /* Always acknowledge device wake up,
414 * sending IBS message doesn't count as TX ON.
415 */
416 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
417 BT_ERR("Failed to acknowledge device wake up");
418
419 qca->ibs_sent_wacks++;
420
421 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
422
423 /* Actually send the packets */
424 hci_uart_tx_wakeup(hu);
425 }
426
427 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
428 {
429 struct qca_data *qca = container_of(work, struct qca_data,
430 ws_rx_vote_off);
431 struct hci_uart *hu = qca->hu;
432
433 BT_DBG("hu %p rx clock vote off", hu);
434
435 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
436 }
437
438 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
439 {
440 struct qca_data *qca = container_of(work, struct qca_data,
441 ws_tx_vote_off);
442 struct hci_uart *hu = qca->hu;
443
444 BT_DBG("hu %p tx clock vote off", hu);
445
446 /* Run HCI tx handling unlocked */
447 hci_uart_tx_wakeup(hu);
448
449 /* Now that message queued to tty driver, vote for tty clocks off.
450 * It is up to the tty driver to pend the clocks off until tx done.
451 */
452 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
453 }
454
455 static void hci_ibs_tx_idle_timeout(struct timer_list *t)
456 {
457 struct qca_data *qca = from_timer(qca, t, tx_idle_timer);
458 struct hci_uart *hu = qca->hu;
459 unsigned long flags;
460
461 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
462
463 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
464 flags, SINGLE_DEPTH_NESTING);
465
466 switch (qca->tx_ibs_state) {
467 case HCI_IBS_TX_AWAKE:
468 /* TX_IDLE, go to SLEEP */
469 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
470 BT_ERR("Failed to send SLEEP to device");
471 break;
472 }
473 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
474 qca->ibs_sent_slps++;
475 queue_work(qca->workqueue, &qca->ws_tx_vote_off);
476 break;
477
478 case HCI_IBS_TX_ASLEEP:
479 case HCI_IBS_TX_WAKING:
480 default:
481 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
482 break;
483 }
484
485 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
486 }
487
488 static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
489 {
490 struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);
491 struct hci_uart *hu = qca->hu;
492 unsigned long flags, retrans_delay;
493 bool retransmit = false;
494
495 BT_DBG("hu %p wake retransmit timeout in %d state",
496 hu, qca->tx_ibs_state);
497
498 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
499 flags, SINGLE_DEPTH_NESTING);
500
501 /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */
502 if (test_bit(QCA_SUSPENDING, &qca->flags)) {
503 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
504 return;
505 }
506
507 switch (qca->tx_ibs_state) {
508 case HCI_IBS_TX_WAKING:
509 /* No WAKE_ACK, retransmit WAKE */
510 retransmit = true;
511 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
512 BT_ERR("Failed to acknowledge device wake up");
513 break;
514 }
515 qca->ibs_sent_wakes++;
516 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
517 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
518 break;
519
520 case HCI_IBS_TX_ASLEEP:
521 case HCI_IBS_TX_AWAKE:
522 default:
523 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
524 break;
525 }
526
527 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
528
529 if (retransmit)
530 hci_uart_tx_wakeup(hu);
531 }
532
533
534 static void qca_controller_memdump_timeout(struct work_struct *work)
535 {
536 struct qca_data *qca = container_of(work, struct qca_data,
537 ctrl_memdump_timeout.work);
538 struct hci_uart *hu = qca->hu;
539
540 mutex_lock(&qca->hci_memdump_lock);
541 if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {
542 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
543 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
544 /* Inject hw error event to reset the device
545 * and driver.
546 */
547 hci_reset_dev(hu->hdev);
548 }
549 }
550
551 mutex_unlock(&qca->hci_memdump_lock);
552 }
553
554
555 /* Initialize protocol */
556 static int qca_open(struct hci_uart *hu)
557 {
558 struct qca_serdev *qcadev;
559 struct qca_data *qca;
560
561 BT_DBG("hu %p qca_open", hu);
562
563 if (!hci_uart_has_flow_control(hu))
564 return -EOPNOTSUPP;
565
566 qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL);
567 if (!qca)
568 return -ENOMEM;
569
570 skb_queue_head_init(&qca->txq);
571 skb_queue_head_init(&qca->tx_wait_q);
572 skb_queue_head_init(&qca->rx_memdump_q);
573 spin_lock_init(&qca->hci_ibs_lock);
574 mutex_init(&qca->hci_memdump_lock);
575 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);
576 if (!qca->workqueue) {
577 BT_ERR("QCA Workqueue not initialized properly");
578 kfree(qca);
579 return -ENOMEM;
580 }
581
582 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
583 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
584 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
585 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
586 INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump);
587 INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout,
588 qca_controller_memdump_timeout);
589 init_waitqueue_head(&qca->suspend_wait_q);
590
591 qca->hu = hu;
592 init_completion(&qca->drop_ev_comp);
593
594 /* Assume we start with both sides asleep -- extra wakes OK */
595 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
596 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
597
598 qca->vote_last_jif = jiffies;
599
600 hu->priv = qca;
601
602 if (hu->serdev) {
603 qcadev = serdev_device_get_drvdata(hu->serdev);
604
605 if (qca_is_wcn399x(qcadev->btsoc_type))
606 hu->init_speed = qcadev->init_speed;
607
608 if (qcadev->oper_speed)
609 hu->oper_speed = qcadev->oper_speed;
610 }
611
612 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
613 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
614
615 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
616 qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS;
617
618 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
619 qca->tx_idle_delay, qca->wake_retrans);
620
621 return 0;
622 }
623
624 static void qca_debugfs_init(struct hci_dev *hdev)
625 {
626 struct hci_uart *hu = hci_get_drvdata(hdev);
627 struct qca_data *qca = hu->priv;
628 struct dentry *ibs_dir;
629 umode_t mode;
630
631 if (!hdev->debugfs)
632 return;
633
634 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
635
636 /* read only */
637 mode = 0444;
638 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
639 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
640 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
641 &qca->ibs_sent_slps);
642 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
643 &qca->ibs_sent_wakes);
644 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
645 &qca->ibs_sent_wacks);
646 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
647 &qca->ibs_recv_slps);
648 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
649 &qca->ibs_recv_wakes);
650 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
651 &qca->ibs_recv_wacks);
652 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
653 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
654 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
655 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
656 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
657 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
658 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
659 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
660 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
661 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
662
663 /* read/write */
664 mode = 0644;
665 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
666 debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
667 &qca->tx_idle_delay);
668 }
669
670 /* Flush protocol data */
671 static int qca_flush(struct hci_uart *hu)
672 {
673 struct qca_data *qca = hu->priv;
674
675 BT_DBG("hu %p qca flush", hu);
676
677 skb_queue_purge(&qca->tx_wait_q);
678 skb_queue_purge(&qca->txq);
679
680 return 0;
681 }
682
683 /* Close protocol */
684 static int qca_close(struct hci_uart *hu)
685 {
686 struct qca_data *qca = hu->priv;
687
688 BT_DBG("hu %p qca close", hu);
689
690 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
691
692 skb_queue_purge(&qca->tx_wait_q);
693 skb_queue_purge(&qca->txq);
694 skb_queue_purge(&qca->rx_memdump_q);
695 del_timer(&qca->tx_idle_timer);
696 del_timer(&qca->wake_retrans_timer);
697 destroy_workqueue(qca->workqueue);
698 qca->hu = NULL;
699
700 kfree_skb(qca->rx_skb);
701
702 hu->priv = NULL;
703
704 kfree(qca);
705
706 return 0;
707 }
708
709 /* Called upon a wake-up-indication from the device.
710 */
711 static void device_want_to_wakeup(struct hci_uart *hu)
712 {
713 unsigned long flags;
714 struct qca_data *qca = hu->priv;
715
716 BT_DBG("hu %p want to wake up", hu);
717
718 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
719
720 qca->ibs_recv_wakes++;
721
722 /* Don't wake the rx up when suspending. */
723 if (test_bit(QCA_SUSPENDING, &qca->flags)) {
724 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
725 return;
726 }
727
728 switch (qca->rx_ibs_state) {
729 case HCI_IBS_RX_ASLEEP:
730 /* Make sure clock is on - we may have turned clock off since
731 * receiving the wake up indicator awake rx clock.
732 */
733 queue_work(qca->workqueue, &qca->ws_awake_rx);
734 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
735 return;
736
737 case HCI_IBS_RX_AWAKE:
738 /* Always acknowledge device wake up,
739 * sending IBS message doesn't count as TX ON.
740 */
741 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
742 BT_ERR("Failed to acknowledge device wake up");
743 break;
744 }
745 qca->ibs_sent_wacks++;
746 break;
747
748 default:
749 /* Any other state is illegal */
750 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
751 qca->rx_ibs_state);
752 break;
753 }
754
755 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
756
757 /* Actually send the packets */
758 hci_uart_tx_wakeup(hu);
759 }
760
761 /* Called upon a sleep-indication from the device.
762 */
763 static void device_want_to_sleep(struct hci_uart *hu)
764 {
765 unsigned long flags;
766 struct qca_data *qca = hu->priv;
767
768 BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state);
769
770 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
771
772 qca->ibs_recv_slps++;
773
774 switch (qca->rx_ibs_state) {
775 case HCI_IBS_RX_AWAKE:
776 /* Update state */
777 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
778 /* Vote off rx clock under workqueue */
779 queue_work(qca->workqueue, &qca->ws_rx_vote_off);
780 break;
781
782 case HCI_IBS_RX_ASLEEP:
783 break;
784
785 default:
786 /* Any other state is illegal */
787 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
788 qca->rx_ibs_state);
789 break;
790 }
791
792 wake_up_interruptible(&qca->suspend_wait_q);
793
794 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
795 }
796
797 /* Called upon wake-up-acknowledgement from the device
798 */
799 static void device_woke_up(struct hci_uart *hu)
800 {
801 unsigned long flags, idle_delay;
802 struct qca_data *qca = hu->priv;
803 struct sk_buff *skb = NULL;
804
805 BT_DBG("hu %p woke up", hu);
806
807 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
808
809 qca->ibs_recv_wacks++;
810
811 /* Don't react to the wake-up-acknowledgment when suspending. */
812 if (test_bit(QCA_SUSPENDING, &qca->flags)) {
813 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
814 return;
815 }
816
817 switch (qca->tx_ibs_state) {
818 case HCI_IBS_TX_AWAKE:
819 /* Expect one if we send 2 WAKEs */
820 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
821 qca->tx_ibs_state);
822 break;
823
824 case HCI_IBS_TX_WAKING:
825 /* Send pending packets */
826 while ((skb = skb_dequeue(&qca->tx_wait_q)))
827 skb_queue_tail(&qca->txq, skb);
828
829 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
830 del_timer(&qca->wake_retrans_timer);
831 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
832 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
833 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
834 break;
835
836 case HCI_IBS_TX_ASLEEP:
837 default:
838 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
839 qca->tx_ibs_state);
840 break;
841 }
842
843 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
844
845 /* Actually send the packets */
846 hci_uart_tx_wakeup(hu);
847 }
848
849 /* Enqueue frame for transmittion (padding, crc, etc) may be called from
850 * two simultaneous tasklets.
851 */
852 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
853 {
854 unsigned long flags = 0, idle_delay;
855 struct qca_data *qca = hu->priv;
856
857 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
858 qca->tx_ibs_state);
859
860 if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
861 /* As SSR is in progress, ignore the packets */
862 bt_dev_dbg(hu->hdev, "SSR is in progress");
863 kfree_skb(skb);
864 return 0;
865 }
866
867 /* Prepend skb with frame type */
868 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
869
870 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
871
872 /* Don't go to sleep in middle of patch download or
873 * Out-Of-Band(GPIOs control) sleep is selected.
874 * Don't wake the device up when suspending.
875 */
876 if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
877 test_bit(QCA_SUSPENDING, &qca->flags)) {
878 skb_queue_tail(&qca->txq, skb);
879 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
880 return 0;
881 }
882
883 /* Act according to current state */
884 switch (qca->tx_ibs_state) {
885 case HCI_IBS_TX_AWAKE:
886 BT_DBG("Device awake, sending normally");
887 skb_queue_tail(&qca->txq, skb);
888 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
889 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
890 break;
891
892 case HCI_IBS_TX_ASLEEP:
893 BT_DBG("Device asleep, waking up and queueing packet");
894 /* Save packet for later */
895 skb_queue_tail(&qca->tx_wait_q, skb);
896
897 qca->tx_ibs_state = HCI_IBS_TX_WAKING;
898 /* Schedule a work queue to wake up device */
899 queue_work(qca->workqueue, &qca->ws_awake_device);
900 break;
901
902 case HCI_IBS_TX_WAKING:
903 BT_DBG("Device waking up, queueing packet");
904 /* Transient state; just keep packet for later */
905 skb_queue_tail(&qca->tx_wait_q, skb);
906 break;
907
908 default:
909 BT_ERR("Illegal tx state: %d (losing packet)",
910 qca->tx_ibs_state);
911 kfree_skb(skb);
912 break;
913 }
914
915 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
916
917 return 0;
918 }
919
920 static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
921 {
922 struct hci_uart *hu = hci_get_drvdata(hdev);
923
924 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
925
926 device_want_to_sleep(hu);
927
928 kfree_skb(skb);
929 return 0;
930 }
931
932 static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
933 {
934 struct hci_uart *hu = hci_get_drvdata(hdev);
935
936 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
937
938 device_want_to_wakeup(hu);
939
940 kfree_skb(skb);
941 return 0;
942 }
943
944 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
945 {
946 struct hci_uart *hu = hci_get_drvdata(hdev);
947
948 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
949
950 device_woke_up(hu);
951
952 kfree_skb(skb);
953 return 0;
954 }
955
956 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb)
957 {
958 /* We receive debug logs from chip as an ACL packets.
959 * Instead of sending the data to ACL to decode the
960 * received data, we are pushing them to the above layers
961 * as a diagnostic packet.
962 */
963 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE)
964 return hci_recv_diag(hdev, skb);
965
966 return hci_recv_frame(hdev, skb);
967 }
968
969 static void qca_controller_memdump(struct work_struct *work)
970 {
971 struct qca_data *qca = container_of(work, struct qca_data,
972 ctrl_memdump_evt);
973 struct hci_uart *hu = qca->hu;
974 struct sk_buff *skb;
975 struct qca_memdump_event_hdr *cmd_hdr;
976 struct qca_memdump_data *qca_memdump = qca->qca_memdump;
977 struct qca_dump_size *dump;
978 char *memdump_buf;
979 char nullBuff[QCA_DUMP_PACKET_SIZE] = { 0 };
980 u16 seq_no;
981 u32 dump_size;
982 u32 rx_size;
983 enum qca_btsoc_type soc_type = qca_soc_type(hu);
984
985 while ((skb = skb_dequeue(&qca->rx_memdump_q))) {
986
987 mutex_lock(&qca->hci_memdump_lock);
988 /* Skip processing the received packets if timeout detected
989 * or memdump collection completed.
990 */
991 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
992 qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
993 mutex_unlock(&qca->hci_memdump_lock);
994 return;
995 }
996
997 if (!qca_memdump) {
998 qca_memdump = kzalloc(sizeof(struct qca_memdump_data),
999 GFP_ATOMIC);
1000 if (!qca_memdump) {
1001 mutex_unlock(&qca->hci_memdump_lock);
1002 return;
1003 }
1004
1005 qca->qca_memdump = qca_memdump;
1006 }
1007
1008 qca->memdump_state = QCA_MEMDUMP_COLLECTING;
1009 cmd_hdr = (void *) skb->data;
1010 seq_no = __le16_to_cpu(cmd_hdr->seq_no);
1011 skb_pull(skb, sizeof(struct qca_memdump_event_hdr));
1012
1013 if (!seq_no) {
1014
1015 /* This is the first frame of memdump packet from
1016 * the controller, Disable IBS to recevie dump
1017 * with out any interruption, ideally time required for
1018 * the controller to send the dump is 8 seconds. let us
1019 * start timer to handle this asynchronous activity.
1020 */
1021 set_bit(QCA_IBS_DISABLED, &qca->flags);
1022 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1023 dump = (void *) skb->data;
1024 dump_size = __le32_to_cpu(dump->dump_size);
1025 if (!(dump_size)) {
1026 bt_dev_err(hu->hdev, "Rx invalid memdump size");
1027 kfree_skb(skb);
1028 mutex_unlock(&qca->hci_memdump_lock);
1029 return;
1030 }
1031
1032 bt_dev_info(hu->hdev, "QCA collecting dump of size:%u",
1033 dump_size);
1034 queue_delayed_work(qca->workqueue,
1035 &qca->ctrl_memdump_timeout,
1036 msecs_to_jiffies(MEMDUMP_TIMEOUT_MS)
1037 );
1038
1039 skb_pull(skb, sizeof(dump_size));
1040 memdump_buf = vmalloc(dump_size);
1041 qca_memdump->ram_dump_size = dump_size;
1042 qca_memdump->memdump_buf_head = memdump_buf;
1043 qca_memdump->memdump_buf_tail = memdump_buf;
1044 }
1045
1046 memdump_buf = qca_memdump->memdump_buf_tail;
1047
1048 /* If sequence no 0 is missed then there is no point in
1049 * accepting the other sequences.
1050 */
1051 if (!memdump_buf) {
1052 bt_dev_err(hu->hdev, "QCA: Discarding other packets");
1053 kfree(qca_memdump);
1054 kfree_skb(skb);
1055 qca->qca_memdump = NULL;
1056 mutex_unlock(&qca->hci_memdump_lock);
1057 return;
1058 }
1059
1060 /* There could be chance of missing some packets from
1061 * the controller. In such cases let us store the dummy
1062 * packets in the buffer.
1063 */
1064 /* For QCA6390, controller does not lost packets but
1065 * sequence number field of packat sometimes has error
1066 * bits, so skip this checking for missing packet.
1067 */
1068 while ((seq_no > qca_memdump->current_seq_no + 1) &&
1069 (soc_type != QCA_QCA6390) &&
1070 seq_no != QCA_LAST_SEQUENCE_NUM) {
1071 bt_dev_err(hu->hdev, "QCA controller missed packet:%d",
1072 qca_memdump->current_seq_no);
1073 rx_size = qca_memdump->received_dump;
1074 rx_size += QCA_DUMP_PACKET_SIZE;
1075 if (rx_size > qca_memdump->ram_dump_size) {
1076 bt_dev_err(hu->hdev,
1077 "QCA memdump received %d, no space for missed packet",
1078 qca_memdump->received_dump);
1079 break;
1080 }
1081 memcpy(memdump_buf, nullBuff, QCA_DUMP_PACKET_SIZE);
1082 memdump_buf = memdump_buf + QCA_DUMP_PACKET_SIZE;
1083 qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE;
1084 qca_memdump->current_seq_no++;
1085 }
1086
1087 rx_size = qca_memdump->received_dump + skb->len;
1088 if (rx_size <= qca_memdump->ram_dump_size) {
1089 if ((seq_no != QCA_LAST_SEQUENCE_NUM) &&
1090 (seq_no != qca_memdump->current_seq_no))
1091 bt_dev_err(hu->hdev,
1092 "QCA memdump unexpected packet %d",
1093 seq_no);
1094 bt_dev_dbg(hu->hdev,
1095 "QCA memdump packet %d with length %d",
1096 seq_no, skb->len);
1097 memcpy(memdump_buf, (unsigned char *)skb->data,
1098 skb->len);
1099 memdump_buf = memdump_buf + skb->len;
1100 qca_memdump->memdump_buf_tail = memdump_buf;
1101 qca_memdump->current_seq_no = seq_no + 1;
1102 qca_memdump->received_dump += skb->len;
1103 } else {
1104 bt_dev_err(hu->hdev,
1105 "QCA memdump received %d, no space for packet %d",
1106 qca_memdump->received_dump, seq_no);
1107 }
1108 qca->qca_memdump = qca_memdump;
1109 kfree_skb(skb);
1110 if (seq_no == QCA_LAST_SEQUENCE_NUM) {
1111 bt_dev_info(hu->hdev,
1112 "QCA memdump Done, received %d, total %d",
1113 qca_memdump->received_dump,
1114 qca_memdump->ram_dump_size);
1115 memdump_buf = qca_memdump->memdump_buf_head;
1116 dev_coredumpv(&hu->serdev->dev, memdump_buf,
1117 qca_memdump->received_dump, GFP_KERNEL);
1118 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1119 kfree(qca->qca_memdump);
1120 qca->qca_memdump = NULL;
1121 qca->memdump_state = QCA_MEMDUMP_COLLECTED;
1122 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1123 }
1124
1125 mutex_unlock(&qca->hci_memdump_lock);
1126 }
1127
1128 }
1129
1130 static int qca_controller_memdump_event(struct hci_dev *hdev,
1131 struct sk_buff *skb)
1132 {
1133 struct hci_uart *hu = hci_get_drvdata(hdev);
1134 struct qca_data *qca = hu->priv;
1135
1136 set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1137 skb_queue_tail(&qca->rx_memdump_q, skb);
1138 queue_work(qca->workqueue, &qca->ctrl_memdump_evt);
1139
1140 return 0;
1141 }
1142
1143 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
1144 {
1145 struct hci_uart *hu = hci_get_drvdata(hdev);
1146 struct qca_data *qca = hu->priv;
1147
1148 if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) {
1149 struct hci_event_hdr *hdr = (void *)skb->data;
1150
1151 /* For the WCN3990 the vendor command for a baudrate change
1152 * isn't sent as synchronous HCI command, because the
1153 * controller sends the corresponding vendor event with the
1154 * new baudrate. The event is received and properly decoded
1155 * after changing the baudrate of the host port. It needs to
1156 * be dropped, otherwise it can be misinterpreted as
1157 * response to a later firmware download command (also a
1158 * vendor command).
1159 */
1160
1161 if (hdr->evt == HCI_EV_VENDOR)
1162 complete(&qca->drop_ev_comp);
1163
1164 kfree_skb(skb);
1165
1166 return 0;
1167 }
1168 /* We receive chip memory dump as an event packet, With a dedicated
1169 * handler followed by a hardware error event. When this event is
1170 * received we store dump into a file before closing hci. This
1171 * dump will help in triaging the issues.
1172 */
1173 if ((skb->data[0] == HCI_VENDOR_PKT) &&
1174 (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE))
1175 return qca_controller_memdump_event(hdev, skb);
1176
1177 return hci_recv_frame(hdev, skb);
1178 }
1179
1180 #define QCA_IBS_SLEEP_IND_EVENT \
1181 .type = HCI_IBS_SLEEP_IND, \
1182 .hlen = 0, \
1183 .loff = 0, \
1184 .lsize = 0, \
1185 .maxlen = HCI_MAX_IBS_SIZE
1186
1187 #define QCA_IBS_WAKE_IND_EVENT \
1188 .type = HCI_IBS_WAKE_IND, \
1189 .hlen = 0, \
1190 .loff = 0, \
1191 .lsize = 0, \
1192 .maxlen = HCI_MAX_IBS_SIZE
1193
1194 #define QCA_IBS_WAKE_ACK_EVENT \
1195 .type = HCI_IBS_WAKE_ACK, \
1196 .hlen = 0, \
1197 .loff = 0, \
1198 .lsize = 0, \
1199 .maxlen = HCI_MAX_IBS_SIZE
1200
1201 static const struct h4_recv_pkt qca_recv_pkts[] = {
1202 { H4_RECV_ACL, .recv = qca_recv_acl_data },
1203 { H4_RECV_SCO, .recv = hci_recv_frame },
1204 { H4_RECV_EVENT, .recv = qca_recv_event },
1205 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind },
1206 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack },
1207 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
1208 };
1209
1210 static int qca_recv(struct hci_uart *hu, const void *data, int count)
1211 {
1212 struct qca_data *qca = hu->priv;
1213
1214 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
1215 return -EUNATCH;
1216
1217 qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
1218 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
1219 if (IS_ERR(qca->rx_skb)) {
1220 int err = PTR_ERR(qca->rx_skb);
1221 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
1222 qca->rx_skb = NULL;
1223 return err;
1224 }
1225
1226 return count;
1227 }
1228
1229 static struct sk_buff *qca_dequeue(struct hci_uart *hu)
1230 {
1231 struct qca_data *qca = hu->priv;
1232
1233 return skb_dequeue(&qca->txq);
1234 }
1235
1236 static uint8_t qca_get_baudrate_value(int speed)
1237 {
1238 switch (speed) {
1239 case 9600:
1240 return QCA_BAUDRATE_9600;
1241 case 19200:
1242 return QCA_BAUDRATE_19200;
1243 case 38400:
1244 return QCA_BAUDRATE_38400;
1245 case 57600:
1246 return QCA_BAUDRATE_57600;
1247 case 115200:
1248 return QCA_BAUDRATE_115200;
1249 case 230400:
1250 return QCA_BAUDRATE_230400;
1251 case 460800:
1252 return QCA_BAUDRATE_460800;
1253 case 500000:
1254 return QCA_BAUDRATE_500000;
1255 case 921600:
1256 return QCA_BAUDRATE_921600;
1257 case 1000000:
1258 return QCA_BAUDRATE_1000000;
1259 case 2000000:
1260 return QCA_BAUDRATE_2000000;
1261 case 3000000:
1262 return QCA_BAUDRATE_3000000;
1263 case 3200000:
1264 return QCA_BAUDRATE_3200000;
1265 case 3500000:
1266 return QCA_BAUDRATE_3500000;
1267 default:
1268 return QCA_BAUDRATE_115200;
1269 }
1270 }
1271
1272 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
1273 {
1274 struct hci_uart *hu = hci_get_drvdata(hdev);
1275 struct qca_data *qca = hu->priv;
1276 struct sk_buff *skb;
1277 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
1278
1279 if (baudrate > QCA_BAUDRATE_3200000)
1280 return -EINVAL;
1281
1282 cmd[4] = baudrate;
1283
1284 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1285 if (!skb) {
1286 bt_dev_err(hdev, "Failed to allocate baudrate packet");
1287 return -ENOMEM;
1288 }
1289
1290 /* Assign commands to change baudrate and packet type. */
1291 skb_put_data(skb, cmd, sizeof(cmd));
1292 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1293
1294 skb_queue_tail(&qca->txq, skb);
1295 hci_uart_tx_wakeup(hu);
1296
1297 /* Wait for the baudrate change request to be sent */
1298
1299 while (!skb_queue_empty(&qca->txq))
1300 usleep_range(100, 200);
1301
1302 if (hu->serdev)
1303 serdev_device_wait_until_sent(hu->serdev,
1304 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
1305
1306 /* Give the controller time to process the request */
1307 if (qca_is_wcn399x(qca_soc_type(hu)))
1308 usleep_range(1000, 10000);
1309 else
1310 msleep(300);
1311
1312 return 0;
1313 }
1314
1315 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
1316 {
1317 if (hu->serdev)
1318 serdev_device_set_baudrate(hu->serdev, speed);
1319 else
1320 hci_uart_set_baudrate(hu, speed);
1321 }
1322
1323 static int qca_send_power_pulse(struct hci_uart *hu, bool on)
1324 {
1325 int ret;
1326 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
1327 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;
1328
1329 /* These power pulses are single byte command which are sent
1330 * at required baudrate to wcn3990. On wcn3990, we have an external
1331 * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1332 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1333 * and also we use the same power inputs to turn on and off for
1334 * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1335 * we send a power on pulse at 115200 bps. This algorithm will help to
1336 * save power. Disabling hardware flow control is mandatory while
1337 * sending power pulses to SoC.
1338 */
1339 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);
1340
1341 serdev_device_write_flush(hu->serdev);
1342 hci_uart_set_flow_control(hu, true);
1343 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
1344 if (ret < 0) {
1345 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);
1346 return ret;
1347 }
1348
1349 serdev_device_wait_until_sent(hu->serdev, timeout);
1350 hci_uart_set_flow_control(hu, false);
1351
1352 /* Give to controller time to boot/shutdown */
1353 if (on)
1354 msleep(100);
1355 else
1356 usleep_range(1000, 10000);
1357
1358 return 0;
1359 }
1360
1361 static unsigned int qca_get_speed(struct hci_uart *hu,
1362 enum qca_speed_type speed_type)
1363 {
1364 unsigned int speed = 0;
1365
1366 if (speed_type == QCA_INIT_SPEED) {
1367 if (hu->init_speed)
1368 speed = hu->init_speed;
1369 else if (hu->proto->init_speed)
1370 speed = hu->proto->init_speed;
1371 } else {
1372 if (hu->oper_speed)
1373 speed = hu->oper_speed;
1374 else if (hu->proto->oper_speed)
1375 speed = hu->proto->oper_speed;
1376 }
1377
1378 return speed;
1379 }
1380
1381 static int qca_check_speeds(struct hci_uart *hu)
1382 {
1383 if (qca_is_wcn399x(qca_soc_type(hu))) {
1384 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
1385 !qca_get_speed(hu, QCA_OPER_SPEED))
1386 return -EINVAL;
1387 } else {
1388 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
1389 !qca_get_speed(hu, QCA_OPER_SPEED))
1390 return -EINVAL;
1391 }
1392
1393 return 0;
1394 }
1395
1396 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
1397 {
1398 unsigned int speed, qca_baudrate;
1399 struct qca_data *qca = hu->priv;
1400 int ret = 0;
1401
1402 if (speed_type == QCA_INIT_SPEED) {
1403 speed = qca_get_speed(hu, QCA_INIT_SPEED);
1404 if (speed)
1405 host_set_baudrate(hu, speed);
1406 } else {
1407 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1408
1409 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1410 if (!speed)
1411 return 0;
1412
1413 /* Disable flow control for wcn3990 to deassert RTS while
1414 * changing the baudrate of chip and host.
1415 */
1416 if (qca_is_wcn399x(soc_type))
1417 hci_uart_set_flow_control(hu, true);
1418
1419 if (soc_type == QCA_WCN3990) {
1420 reinit_completion(&qca->drop_ev_comp);
1421 set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1422 }
1423
1424 qca_baudrate = qca_get_baudrate_value(speed);
1425 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
1426 ret = qca_set_baudrate(hu->hdev, qca_baudrate);
1427 if (ret)
1428 goto error;
1429
1430 host_set_baudrate(hu, speed);
1431
1432 error:
1433 if (qca_is_wcn399x(soc_type))
1434 hci_uart_set_flow_control(hu, false);
1435
1436 if (soc_type == QCA_WCN3990) {
1437 /* Wait for the controller to send the vendor event
1438 * for the baudrate change command.
1439 */
1440 if (!wait_for_completion_timeout(&qca->drop_ev_comp,
1441 msecs_to_jiffies(100))) {
1442 bt_dev_err(hu->hdev,
1443 "Failed to change controller baudrate\n");
1444 ret = -ETIMEDOUT;
1445 }
1446
1447 clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1448 }
1449 }
1450
1451 return ret;
1452 }
1453
1454 static int qca_send_crashbuffer(struct hci_uart *hu)
1455 {
1456 struct qca_data *qca = hu->priv;
1457 struct sk_buff *skb;
1458
1459 skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL);
1460 if (!skb) {
1461 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet");
1462 return -ENOMEM;
1463 }
1464
1465 /* We forcefully crash the controller, by sending 0xfb byte for
1466 * 1024 times. We also might have chance of losing data, To be
1467 * on safer side we send 1096 bytes to the SoC.
1468 */
1469 memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE,
1470 QCA_CRASHBYTE_PACKET_LEN);
1471 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1472 bt_dev_info(hu->hdev, "crash the soc to collect controller dump");
1473 skb_queue_tail(&qca->txq, skb);
1474 hci_uart_tx_wakeup(hu);
1475
1476 return 0;
1477 }
1478
1479 static void qca_wait_for_dump_collection(struct hci_dev *hdev)
1480 {
1481 struct hci_uart *hu = hci_get_drvdata(hdev);
1482 struct qca_data *qca = hu->priv;
1483
1484 wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION,
1485 TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS);
1486
1487 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1488 }
1489
1490 static void qca_hw_error(struct hci_dev *hdev, u8 code)
1491 {
1492 struct hci_uart *hu = hci_get_drvdata(hdev);
1493 struct qca_data *qca = hu->priv;
1494
1495 set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1496 set_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1497 bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state);
1498
1499 if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1500 /* If hardware error event received for other than QCA
1501 * soc memory dump event, then we need to crash the SOC
1502 * and wait here for 8 seconds to get the dump packets.
1503 * This will block main thread to be on hold until we
1504 * collect dump.
1505 */
1506 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1507 qca_send_crashbuffer(hu);
1508 qca_wait_for_dump_collection(hdev);
1509 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1510 /* Let us wait here until memory dump collected or
1511 * memory dump timer expired.
1512 */
1513 bt_dev_info(hdev, "waiting for dump to complete");
1514 qca_wait_for_dump_collection(hdev);
1515 }
1516
1517 mutex_lock(&qca->hci_memdump_lock);
1518 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1519 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout");
1520 if (qca->qca_memdump) {
1521 vfree(qca->qca_memdump->memdump_buf_head);
1522 kfree(qca->qca_memdump);
1523 qca->qca_memdump = NULL;
1524 }
1525 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1526 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1527 }
1528 mutex_unlock(&qca->hci_memdump_lock);
1529
1530 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1531 qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1532 cancel_work_sync(&qca->ctrl_memdump_evt);
1533 skb_queue_purge(&qca->rx_memdump_q);
1534 }
1535
1536 clear_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1537 }
1538
1539 static void qca_cmd_timeout(struct hci_dev *hdev)
1540 {
1541 struct hci_uart *hu = hci_get_drvdata(hdev);
1542 struct qca_data *qca = hu->priv;
1543
1544 set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1545 if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1546 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1547 qca_send_crashbuffer(hu);
1548 qca_wait_for_dump_collection(hdev);
1549 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1550 /* Let us wait here until memory dump collected or
1551 * memory dump timer expired.
1552 */
1553 bt_dev_info(hdev, "waiting for dump to complete");
1554 qca_wait_for_dump_collection(hdev);
1555 }
1556
1557 mutex_lock(&qca->hci_memdump_lock);
1558 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1559 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1560 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
1561 /* Inject hw error event to reset the device
1562 * and driver.
1563 */
1564 hci_reset_dev(hu->hdev);
1565 }
1566 }
1567 mutex_unlock(&qca->hci_memdump_lock);
1568 }
1569
1570 static int qca_wcn3990_init(struct hci_uart *hu)
1571 {
1572 struct qca_serdev *qcadev;
1573 int ret;
1574
1575 /* Check for vregs status, may be hci down has turned
1576 * off the voltage regulator.
1577 */
1578 qcadev = serdev_device_get_drvdata(hu->serdev);
1579 if (!qcadev->bt_power->vregs_on) {
1580 serdev_device_close(hu->serdev);
1581 ret = qca_regulator_enable(qcadev);
1582 if (ret)
1583 return ret;
1584
1585 ret = serdev_device_open(hu->serdev);
1586 if (ret) {
1587 bt_dev_err(hu->hdev, "failed to open port");
1588 return ret;
1589 }
1590 }
1591
1592 /* Forcefully enable wcn3990 to enter in to boot mode. */
1593 host_set_baudrate(hu, 2400);
1594 ret = qca_send_power_pulse(hu, false);
1595 if (ret)
1596 return ret;
1597
1598 qca_set_speed(hu, QCA_INIT_SPEED);
1599 ret = qca_send_power_pulse(hu, true);
1600 if (ret)
1601 return ret;
1602
1603 /* Now the device is in ready state to communicate with host.
1604 * To sync host with device we need to reopen port.
1605 * Without this, we will have RTS and CTS synchronization
1606 * issues.
1607 */
1608 serdev_device_close(hu->serdev);
1609 ret = serdev_device_open(hu->serdev);
1610 if (ret) {
1611 bt_dev_err(hu->hdev, "failed to open port");
1612 return ret;
1613 }
1614
1615 hci_uart_set_flow_control(hu, false);
1616
1617 return 0;
1618 }
1619
1620 static int qca_power_on(struct hci_dev *hdev)
1621 {
1622 struct hci_uart *hu = hci_get_drvdata(hdev);
1623 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1624 struct qca_serdev *qcadev;
1625 struct qca_data *qca = hu->priv;
1626 int ret = 0;
1627
1628 /* Non-serdev device usually is powered by external power
1629 * and don't need additional action in driver for power on
1630 */
1631 if (!hu->serdev)
1632 return 0;
1633
1634 if (qca_is_wcn399x(soc_type)) {
1635 ret = qca_wcn3990_init(hu);
1636 } else {
1637 qcadev = serdev_device_get_drvdata(hu->serdev);
1638 if (qcadev->bt_en) {
1639 gpiod_set_value_cansleep(qcadev->bt_en, 1);
1640 /* Controller needs time to bootup. */
1641 msleep(150);
1642 }
1643 }
1644
1645 clear_bit(QCA_BT_OFF, &qca->flags);
1646 return ret;
1647 }
1648
1649 static int qca_setup(struct hci_uart *hu)
1650 {
1651 struct hci_dev *hdev = hu->hdev;
1652 struct qca_data *qca = hu->priv;
1653 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
1654 unsigned int retries = 0;
1655 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1656 const char *firmware_name = qca_get_firmware_name(hu);
1657 int ret;
1658 struct qca_btsoc_version ver;
1659
1660 ret = qca_check_speeds(hu);
1661 if (ret)
1662 return ret;
1663
1664 /* Patch downloading has to be done without IBS mode */
1665 set_bit(QCA_IBS_DISABLED, &qca->flags);
1666
1667 /* Enable controller to do both LE scan and BR/EDR inquiry
1668 * simultaneously.
1669 */
1670 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1671
1672 bt_dev_info(hdev, "setting up %s",
1673 qca_is_wcn399x(soc_type) ? "wcn399x" : "ROME/QCA6390");
1674
1675 qca->memdump_state = QCA_MEMDUMP_IDLE;
1676
1677 retry:
1678 ret = qca_power_on(hdev);
1679 if (ret)
1680 goto out;
1681
1682 clear_bit(QCA_SSR_TRIGGERED, &qca->flags);
1683
1684 if (qca_is_wcn399x(soc_type)) {
1685 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
1686
1687 ret = qca_read_soc_version(hdev, &ver, soc_type);
1688 if (ret)
1689 goto out;
1690 } else {
1691 qca_set_speed(hu, QCA_INIT_SPEED);
1692 }
1693
1694 /* Setup user speed if needed */
1695 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1696 if (speed) {
1697 ret = qca_set_speed(hu, QCA_OPER_SPEED);
1698 if (ret)
1699 goto out;
1700
1701 qca_baudrate = qca_get_baudrate_value(speed);
1702 }
1703
1704 if (!qca_is_wcn399x(soc_type)) {
1705 /* Get QCA version information */
1706 ret = qca_read_soc_version(hdev, &ver, soc_type);
1707 if (ret)
1708 goto out;
1709 }
1710
1711 /* Setup patch / NVM configurations */
1712 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver,
1713 firmware_name);
1714 if (!ret) {
1715 clear_bit(QCA_IBS_DISABLED, &qca->flags);
1716 qca_debugfs_init(hdev);
1717 hu->hdev->hw_error = qca_hw_error;
1718 hu->hdev->cmd_timeout = qca_cmd_timeout;
1719 } else if (ret == -ENOENT) {
1720 /* No patch/nvm-config found, run with original fw/config */
1721 ret = 0;
1722 } else if (ret == -EAGAIN) {
1723 /*
1724 * Userspace firmware loader will return -EAGAIN in case no
1725 * patch/nvm-config is found, so run with original fw/config.
1726 */
1727 ret = 0;
1728 }
1729
1730 out:
1731 if (ret && retries < MAX_INIT_RETRIES) {
1732 bt_dev_warn(hdev, "Retry BT power ON:%d", retries);
1733 qca_power_shutdown(hu);
1734 if (hu->serdev) {
1735 serdev_device_close(hu->serdev);
1736 ret = serdev_device_open(hu->serdev);
1737 if (ret) {
1738 bt_dev_err(hdev, "failed to open port");
1739 return ret;
1740 }
1741 }
1742 retries++;
1743 goto retry;
1744 }
1745
1746 /* Setup bdaddr */
1747 if (soc_type == QCA_ROME)
1748 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
1749 else
1750 hu->hdev->set_bdaddr = qca_set_bdaddr;
1751
1752 return ret;
1753 }
1754
1755 static const struct hci_uart_proto qca_proto = {
1756 .id = HCI_UART_QCA,
1757 .name = "QCA",
1758 .manufacturer = 29,
1759 .init_speed = 115200,
1760 .oper_speed = 3000000,
1761 .open = qca_open,
1762 .close = qca_close,
1763 .flush = qca_flush,
1764 .setup = qca_setup,
1765 .recv = qca_recv,
1766 .enqueue = qca_enqueue,
1767 .dequeue = qca_dequeue,
1768 };
1769
1770 static const struct qca_device_data qca_soc_data_wcn3990 = {
1771 .soc_type = QCA_WCN3990,
1772 .vregs = (struct qca_vreg []) {
1773 { "vddio", 15000 },
1774 { "vddxo", 80000 },
1775 { "vddrf", 300000 },
1776 { "vddch0", 450000 },
1777 },
1778 .num_vregs = 4,
1779 };
1780
1781 static const struct qca_device_data qca_soc_data_wcn3991 = {
1782 .soc_type = QCA_WCN3991,
1783 .vregs = (struct qca_vreg []) {
1784 { "vddio", 15000 },
1785 { "vddxo", 80000 },
1786 { "vddrf", 300000 },
1787 { "vddch0", 450000 },
1788 },
1789 .num_vregs = 4,
1790 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
1791 };
1792
1793 static const struct qca_device_data qca_soc_data_wcn3998 = {
1794 .soc_type = QCA_WCN3998,
1795 .vregs = (struct qca_vreg []) {
1796 { "vddio", 10000 },
1797 { "vddxo", 80000 },
1798 { "vddrf", 300000 },
1799 { "vddch0", 450000 },
1800 },
1801 .num_vregs = 4,
1802 };
1803
1804 static const struct qca_device_data qca_soc_data_qca6390 = {
1805 .soc_type = QCA_QCA6390,
1806 .num_vregs = 0,
1807 };
1808
1809 static void qca_power_shutdown(struct hci_uart *hu)
1810 {
1811 struct qca_serdev *qcadev;
1812 struct qca_data *qca = hu->priv;
1813 unsigned long flags;
1814 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1815
1816 qcadev = serdev_device_get_drvdata(hu->serdev);
1817
1818 /* From this point we go into power off state. But serial port is
1819 * still open, stop queueing the IBS data and flush all the buffered
1820 * data in skb's.
1821 */
1822 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
1823 set_bit(QCA_IBS_DISABLED, &qca->flags);
1824 qca_flush(hu);
1825 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
1826
1827 /* Non-serdev device usually is powered by external power
1828 * and don't need additional action in driver for power down
1829 */
1830 if (!hu->serdev)
1831 return;
1832
1833 if (qca_is_wcn399x(soc_type)) {
1834 host_set_baudrate(hu, 2400);
1835 qca_send_power_pulse(hu, false);
1836 qca_regulator_disable(qcadev);
1837 } else if (qcadev->bt_en) {
1838 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1839 }
1840
1841 set_bit(QCA_BT_OFF, &qca->flags);
1842 }
1843
1844 static int qca_power_off(struct hci_dev *hdev)
1845 {
1846 struct hci_uart *hu = hci_get_drvdata(hdev);
1847 struct qca_data *qca = hu->priv;
1848 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1849
1850 hu->hdev->hw_error = NULL;
1851 hu->hdev->cmd_timeout = NULL;
1852
1853 /* Stop sending shutdown command if soc crashes. */
1854 if (soc_type != QCA_ROME
1855 && qca->memdump_state == QCA_MEMDUMP_IDLE) {
1856 qca_send_pre_shutdown_cmd(hdev);
1857 usleep_range(8000, 10000);
1858 }
1859
1860 qca_power_shutdown(hu);
1861 return 0;
1862 }
1863
1864 static int qca_regulator_enable(struct qca_serdev *qcadev)
1865 {
1866 struct qca_power *power = qcadev->bt_power;
1867 int ret;
1868
1869 /* Already enabled */
1870 if (power->vregs_on)
1871 return 0;
1872
1873 BT_DBG("enabling %d regulators)", power->num_vregs);
1874
1875 ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk);
1876 if (ret)
1877 return ret;
1878
1879 power->vregs_on = true;
1880
1881 ret = clk_prepare_enable(qcadev->susclk);
1882 if (ret)
1883 qca_regulator_disable(qcadev);
1884
1885 return ret;
1886 }
1887
1888 static void qca_regulator_disable(struct qca_serdev *qcadev)
1889 {
1890 struct qca_power *power;
1891
1892 if (!qcadev)
1893 return;
1894
1895 power = qcadev->bt_power;
1896
1897 /* Already disabled? */
1898 if (!power->vregs_on)
1899 return;
1900
1901 regulator_bulk_disable(power->num_vregs, power->vreg_bulk);
1902 power->vregs_on = false;
1903
1904 clk_disable_unprepare(qcadev->susclk);
1905 }
1906
1907 static int qca_init_regulators(struct qca_power *qca,
1908 const struct qca_vreg *vregs, size_t num_vregs)
1909 {
1910 struct regulator_bulk_data *bulk;
1911 int ret;
1912 int i;
1913
1914 bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL);
1915 if (!bulk)
1916 return -ENOMEM;
1917
1918 for (i = 0; i < num_vregs; i++)
1919 bulk[i].supply = vregs[i].name;
1920
1921 ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk);
1922 if (ret < 0)
1923 return ret;
1924
1925 for (i = 0; i < num_vregs; i++) {
1926 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA);
1927 if (ret)
1928 return ret;
1929 }
1930
1931 qca->vreg_bulk = bulk;
1932 qca->num_vregs = num_vregs;
1933
1934 return 0;
1935 }
1936
1937 static int qca_serdev_probe(struct serdev_device *serdev)
1938 {
1939 struct qca_serdev *qcadev;
1940 struct hci_dev *hdev;
1941 const struct qca_device_data *data;
1942 int err;
1943 bool power_ctrl_enabled = true;
1944
1945 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
1946 if (!qcadev)
1947 return -ENOMEM;
1948
1949 qcadev->serdev_hu.serdev = serdev;
1950 data = device_get_match_data(&serdev->dev);
1951 serdev_device_set_drvdata(serdev, qcadev);
1952 device_property_read_string(&serdev->dev, "firmware-name",
1953 &qcadev->firmware_name);
1954 device_property_read_u32(&serdev->dev, "max-speed",
1955 &qcadev->oper_speed);
1956 if (!qcadev->oper_speed)
1957 BT_DBG("UART will pick default operating speed");
1958
1959 if (data && qca_is_wcn399x(data->soc_type)) {
1960 qcadev->btsoc_type = data->soc_type;
1961 qcadev->bt_power = devm_kzalloc(&serdev->dev,
1962 sizeof(struct qca_power),
1963 GFP_KERNEL);
1964 if (!qcadev->bt_power)
1965 return -ENOMEM;
1966
1967 qcadev->bt_power->dev = &serdev->dev;
1968 err = qca_init_regulators(qcadev->bt_power, data->vregs,
1969 data->num_vregs);
1970 if (err) {
1971 BT_ERR("Failed to init regulators:%d", err);
1972 return err;
1973 }
1974
1975 qcadev->bt_power->vregs_on = false;
1976
1977 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
1978 if (IS_ERR(qcadev->susclk)) {
1979 dev_err(&serdev->dev, "failed to acquire clk\n");
1980 return PTR_ERR(qcadev->susclk);
1981 }
1982
1983 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
1984 if (err) {
1985 BT_ERR("wcn3990 serdev registration failed");
1986 return err;
1987 }
1988 } else {
1989 if (data)
1990 qcadev->btsoc_type = data->soc_type;
1991 else
1992 qcadev->btsoc_type = QCA_ROME;
1993
1994 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
1995 GPIOD_OUT_LOW);
1996 if (!qcadev->bt_en) {
1997 dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
1998 power_ctrl_enabled = false;
1999 }
2000
2001 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2002 if (IS_ERR(qcadev->susclk)) {
2003 dev_warn(&serdev->dev, "failed to acquire clk\n");
2004 return PTR_ERR(qcadev->susclk);
2005 }
2006 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
2007 if (err)
2008 return err;
2009
2010 err = clk_prepare_enable(qcadev->susclk);
2011 if (err)
2012 return err;
2013
2014 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2015 if (err) {
2016 BT_ERR("Rome serdev registration failed");
2017 clk_disable_unprepare(qcadev->susclk);
2018 return err;
2019 }
2020 }
2021
2022 hdev = qcadev->serdev_hu.hdev;
2023
2024 if (power_ctrl_enabled) {
2025 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
2026 hdev->shutdown = qca_power_off;
2027 }
2028
2029 if (data) {
2030 /* Wideband speech support must be set per driver since it can't
2031 * be queried via hci. Same with the valid le states quirk.
2032 */
2033 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH)
2034 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
2035 &hdev->quirks);
2036
2037 if (data->capabilities & QCA_CAP_VALID_LE_STATES)
2038 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
2039 }
2040
2041 return 0;
2042 }
2043
2044 static void qca_serdev_remove(struct serdev_device *serdev)
2045 {
2046 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2047 struct qca_power *power = qcadev->bt_power;
2048
2049 if (qca_is_wcn399x(qcadev->btsoc_type) && power->vregs_on)
2050 qca_power_shutdown(&qcadev->serdev_hu);
2051 else if (qcadev->susclk)
2052 clk_disable_unprepare(qcadev->susclk);
2053
2054 hci_uart_unregister_device(&qcadev->serdev_hu);
2055 }
2056
2057 static void qca_serdev_shutdown(struct device *dev)
2058 {
2059 int ret;
2060 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
2061 struct serdev_device *serdev = to_serdev_device(dev);
2062 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2063 const u8 ibs_wake_cmd[] = { 0xFD };
2064 const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
2065
2066 if (qcadev->btsoc_type == QCA_QCA6390) {
2067 serdev_device_write_flush(serdev);
2068 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,
2069 sizeof(ibs_wake_cmd));
2070 if (ret < 0) {
2071 BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);
2072 return;
2073 }
2074 serdev_device_wait_until_sent(serdev, timeout);
2075 usleep_range(8000, 10000);
2076
2077 serdev_device_write_flush(serdev);
2078 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd,
2079 sizeof(edl_reset_soc_cmd));
2080 if (ret < 0) {
2081 BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
2082 return;
2083 }
2084 serdev_device_wait_until_sent(serdev, timeout);
2085 usleep_range(8000, 10000);
2086 }
2087 }
2088
2089 static int __maybe_unused qca_suspend(struct device *dev)
2090 {
2091 struct serdev_device *serdev = to_serdev_device(dev);
2092 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2093 struct hci_uart *hu = &qcadev->serdev_hu;
2094 struct qca_data *qca = hu->priv;
2095 unsigned long flags;
2096 bool tx_pending = false;
2097 int ret = 0;
2098 u8 cmd;
2099 u32 wait_timeout = 0;
2100
2101 set_bit(QCA_SUSPENDING, &qca->flags);
2102
2103 if (test_bit(QCA_BT_OFF, &qca->flags))
2104 return 0;
2105
2106 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) {
2107 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ?
2108 IBS_DISABLE_SSR_TIMEOUT_MS :
2109 FW_DOWNLOAD_TIMEOUT_MS;
2110
2111 /* QCA_IBS_DISABLED flag is set to true, During FW download
2112 * and during memory dump collection. It is reset to false,
2113 * After FW download complete and after memory dump collections.
2114 */
2115 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED,
2116 TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout));
2117
2118 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) {
2119 bt_dev_err(hu->hdev, "SSR or FW download time out");
2120 ret = -ETIMEDOUT;
2121 goto error;
2122 }
2123 }
2124
2125 /* After memory dump collection, Controller is powered off.*/
2126 if (test_bit(QCA_BT_OFF, &qca->flags))
2127 return 0;
2128
2129 cancel_work_sync(&qca->ws_awake_device);
2130 cancel_work_sync(&qca->ws_awake_rx);
2131
2132 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
2133 flags, SINGLE_DEPTH_NESTING);
2134
2135 switch (qca->tx_ibs_state) {
2136 case HCI_IBS_TX_WAKING:
2137 del_timer(&qca->wake_retrans_timer);
2138 fallthrough;
2139 case HCI_IBS_TX_AWAKE:
2140 del_timer(&qca->tx_idle_timer);
2141
2142 serdev_device_write_flush(hu->serdev);
2143 cmd = HCI_IBS_SLEEP_IND;
2144 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
2145
2146 if (ret < 0) {
2147 BT_ERR("Failed to send SLEEP to device");
2148 break;
2149 }
2150
2151 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
2152 qca->ibs_sent_slps++;
2153 tx_pending = true;
2154 break;
2155
2156 case HCI_IBS_TX_ASLEEP:
2157 break;
2158
2159 default:
2160 BT_ERR("Spurious tx state %d", qca->tx_ibs_state);
2161 ret = -EINVAL;
2162 break;
2163 }
2164
2165 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
2166
2167 if (ret < 0)
2168 goto error;
2169
2170 if (tx_pending) {
2171 serdev_device_wait_until_sent(hu->serdev,
2172 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
2173 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
2174 }
2175
2176 /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going
2177 * to sleep, so that the packet does not wake the system later.
2178 */
2179 ret = wait_event_interruptible_timeout(qca->suspend_wait_q,
2180 qca->rx_ibs_state == HCI_IBS_RX_ASLEEP,
2181 msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS));
2182 if (ret == 0) {
2183 ret = -ETIMEDOUT;
2184 goto error;
2185 }
2186
2187 return 0;
2188
2189 error:
2190 clear_bit(QCA_SUSPENDING, &qca->flags);
2191
2192 return ret;
2193 }
2194
2195 static int __maybe_unused qca_resume(struct device *dev)
2196 {
2197 struct serdev_device *serdev = to_serdev_device(dev);
2198 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2199 struct hci_uart *hu = &qcadev->serdev_hu;
2200 struct qca_data *qca = hu->priv;
2201
2202 clear_bit(QCA_SUSPENDING, &qca->flags);
2203
2204 return 0;
2205 }
2206
2207 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume);
2208
2209 #ifdef CONFIG_OF
2210 static const struct of_device_id qca_bluetooth_of_match[] = {
2211 { .compatible = "qcom,qca6174-bt" },
2212 { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},
2213 { .compatible = "qcom,qca9377-bt" },
2214 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},
2215 { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},
2216 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},
2217 { /* sentinel */ }
2218 };
2219 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
2220 #endif
2221
2222 #ifdef CONFIG_ACPI
2223 static const struct acpi_device_id qca_bluetooth_acpi_match[] = {
2224 { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2225 { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2226 { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2227 { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2228 { },
2229 };
2230 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match);
2231 #endif
2232
2233
2234 static struct serdev_device_driver qca_serdev_driver = {
2235 .probe = qca_serdev_probe,
2236 .remove = qca_serdev_remove,
2237 .driver = {
2238 .name = "hci_uart_qca",
2239 .of_match_table = of_match_ptr(qca_bluetooth_of_match),
2240 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
2241 .shutdown = qca_serdev_shutdown,
2242 .pm = &qca_pm_ops,
2243 },
2244 };
2245
2246 int __init qca_init(void)
2247 {
2248 serdev_device_driver_register(&qca_serdev_driver);
2249
2250 return hci_uart_register_proto(&qca_proto);
2251 }
2252
2253 int __exit qca_deinit(void)
2254 {
2255 serdev_device_driver_unregister(&qca_serdev_driver);
2256
2257 return hci_uart_unregister_proto(&qca_proto);
2258 }
Linux with added FPC-III support