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Merge tag 'kbuild-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy...
[linux-2.6-block.git] / drivers / bluetooth / hci_qca.c
CommitLineData
0ff252c1
BYTK		 1/*
2 * Bluetooth Software UART Qualcomm protocol
3 *
4 * HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management
5 * protocol extension to H4.
6 *
7 * Copyright (C) 2007 Texas Instruments, Inc.
fa9ad876 8 * Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved.
0ff252c1
BYTK		 9 *
10 * Acknowledgements:
11 * This file is based on hci_ll.c, which was...
12 * Written by Ohad Ben-Cohen <ohad@bencohen.org>
13 * which was in turn based on hci_h4.c, which was written
14 * by Maxim Krasnyansky and Marcel Holtmann.
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2
18 * as published by the Free Software Foundation
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 *
29 */
30
31#include <linux/kernel.h>
05ba533c 32#include <linux/clk.h>
0ff252c1 33#include <linux/debugfs.h>
fa9ad876
BG		 34#include <linux/delay.h>
35#include <linux/device.h>
05ba533c
TE		 36#include <linux/gpio/consumer.h>
37#include <linux/mod_devicetable.h>
38#include <linux/module.h>
fa9ad876
BG		 39#include <linux/of_device.h>
40#include <linux/platform_device.h>
41#include <linux/regulator/consumer.h>
05ba533c 42#include <linux/serdev.h>
c614ca3f 43#include <asm/unaligned.h>
0ff252c1
BYTK		 44
45#include <net/bluetooth/bluetooth.h>
46#include <net/bluetooth/hci_core.h>
47
48#include "hci_uart.h"
49#include "btqca.h"
50
51/* HCI_IBS protocol messages */
52#define HCI_IBS_SLEEP_IND 0xFE
53#define HCI_IBS_WAKE_IND 0xFD
54#define HCI_IBS_WAKE_ACK 0xFC
f81b001a 55#define HCI_MAX_IBS_SIZE 10
0ff252c1 56
f81b001a
MH		 57#define IBS_WAKE_RETRANS_TIMEOUT_MS 100
58#define IBS_TX_IDLE_TIMEOUT_MS 2000
94d66714 59#define CMD_TRANS_TIMEOUT_MS 100
0ff252c1 60
05ba533c
TE		 61/* susclk rate */
62#define SUSCLK_RATE_32KHZ 32768
63
c614ca3f
BG		 64/* Controller debug log header */
65#define QCA_DEBUG_HANDLE 0x2EDC
66
62a91990
MK		 67enum qca_flags {
68 QCA_IBS_ENABLED,
69};
70
0ff252c1
BYTK		 71/* HCI_IBS transmit side sleep protocol states */
72enum tx_ibs_states {
73 HCI_IBS_TX_ASLEEP,
74 HCI_IBS_TX_WAKING,
75 HCI_IBS_TX_AWAKE,
76};
77
78/* HCI_IBS receive side sleep protocol states */
79enum rx_states {
80 HCI_IBS_RX_ASLEEP,
81 HCI_IBS_RX_AWAKE,
82};
83
84/* HCI_IBS transmit and receive side clock state vote */
85enum hci_ibs_clock_state_vote {
86 HCI_IBS_VOTE_STATS_UPDATE,
87 HCI_IBS_TX_VOTE_CLOCK_ON,
88 HCI_IBS_TX_VOTE_CLOCK_OFF,
89 HCI_IBS_RX_VOTE_CLOCK_ON,
90 HCI_IBS_RX_VOTE_CLOCK_OFF,
91};
92
93struct qca_data {
94 struct hci_uart *hu;
95 struct sk_buff *rx_skb;
96 struct sk_buff_head txq;
97 struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */
98 spinlock_t hci_ibs_lock; /* HCI_IBS state lock */
99 u8 tx_ibs_state; /* HCI_IBS transmit side power state*/
100 u8 rx_ibs_state; /* HCI_IBS receive side power state */
621a5f7a
VK		 101 bool tx_vote; /* Clock must be on for TX */
102 bool rx_vote; /* Clock must be on for RX */
0ff252c1
BYTK		 103 struct timer_list tx_idle_timer;
104 u32 tx_idle_delay;
105 struct timer_list wake_retrans_timer;
106 u32 wake_retrans;
107 struct workqueue_struct *workqueue;
108 struct work_struct ws_awake_rx;
109 struct work_struct ws_awake_device;
110 struct work_struct ws_rx_vote_off;
111 struct work_struct ws_tx_vote_off;
112 unsigned long flags;
113
114 /* For debugging purpose */
115 u64 ibs_sent_wacks;
116 u64 ibs_sent_slps;
117 u64 ibs_sent_wakes;
118 u64 ibs_recv_wacks;
119 u64 ibs_recv_slps;
120 u64 ibs_recv_wakes;
121 u64 vote_last_jif;
122 u32 vote_on_ms;
123 u32 vote_off_ms;
124 u64 tx_votes_on;
125 u64 rx_votes_on;
126 u64 tx_votes_off;
127 u64 rx_votes_off;
128 u64 votes_on;
129 u64 votes_off;
130};
131
83d9c5e5
BG		 132enum qca_speed_type {
133 QCA_INIT_SPEED = 1,
134 QCA_OPER_SPEED
135};
136
fa9ad876
BG		 137/*
138 * Voltage regulator information required for configuring the
139 * QCA Bluetooth chipset
140 */
141struct qca_vreg {
142 const char *name;
143 unsigned int min_uV;
144 unsigned int max_uV;
145 unsigned int load_uA;
146};
147
148struct qca_vreg_data {
149 enum qca_btsoc_type soc_type;
150 struct qca_vreg *vregs;
151 size_t num_vregs;
152};
153
154/*
155 * Platform data for the QCA Bluetooth power driver.
156 */
157struct qca_power {
158 struct device *dev;
159 const struct qca_vreg_data *vreg_data;
160 struct regulator_bulk_data *vreg_bulk;
161 bool vregs_on;
162};
163
05ba533c
TE		 164struct qca_serdev {
165 struct hci_uart serdev_hu;
166 struct gpio_desc *bt_en;
167 struct clk *susclk;
fa9ad876
BG		 168 enum qca_btsoc_type btsoc_type;
169 struct qca_power *bt_power;
170 u32 init_speed;
171 u32 oper_speed;
05ba533c
TE		 172};
173
fa9ad876 174static int qca_power_setup(struct hci_uart *hu, bool on);
c2d78273 175static void qca_power_shutdown(struct hci_uart *hu);
3e4be65e 176static int qca_power_off(struct hci_dev *hdev);
fa9ad876 177
4fdd5a4f
MK		 178static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
179{
180 enum qca_btsoc_type soc_type;
181
182 if (hu->serdev) {
183 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
184
185 soc_type = qsd->btsoc_type;
186 } else {
187 soc_type = QCA_ROME;
188 }
189
190 return soc_type;
191}
192
0ff252c1
BYTK		 193static void __serial_clock_on(struct tty_struct *tty)
194{
195 /* TODO: Some chipset requires to enable UART clock on client
196 * side to save power consumption or manual work is required.
197 * Please put your code to control UART clock here if needed
198 */
199}
200
201static void __serial_clock_off(struct tty_struct *tty)
202{
203 /* TODO: Some chipset requires to disable UART clock on client
204 * side to save power consumption or manual work is required.
205 * Please put your code to control UART clock off here if needed
206 */
207}
208
209/* serial_clock_vote needs to be called with the ibs lock held */
210static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
211{
212 struct qca_data *qca = hu->priv;
213 unsigned int diff;
214
215 bool old_vote = (qca->tx_vote | qca->rx_vote);
216 bool new_vote;
217
218 switch (vote) {
219 case HCI_IBS_VOTE_STATS_UPDATE:
220 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
221
222 if (old_vote)
223 qca->vote_off_ms += diff;
224 else
225 qca->vote_on_ms += diff;
226 return;
227
228 case HCI_IBS_TX_VOTE_CLOCK_ON:
229 qca->tx_vote = true;
230 qca->tx_votes_on++;
231 new_vote = true;
232 break;
233
234 case HCI_IBS_RX_VOTE_CLOCK_ON:
235 qca->rx_vote = true;
236 qca->rx_votes_on++;
237 new_vote = true;
238 break;
239
240 case HCI_IBS_TX_VOTE_CLOCK_OFF:
241 qca->tx_vote = false;
242 qca->tx_votes_off++;
243 new_vote = qca->rx_vote | qca->tx_vote;
244 break;
245
246 case HCI_IBS_RX_VOTE_CLOCK_OFF:
247 qca->rx_vote = false;
248 qca->rx_votes_off++;
249 new_vote = qca->rx_vote | qca->tx_vote;
250 break;
251
252 default:
253 BT_ERR("Voting irregularity");
254 return;
255 }
256
257 if (new_vote != old_vote) {
258 if (new_vote)
259 __serial_clock_on(hu->tty);
260 else
261 __serial_clock_off(hu->tty);
262
ce26d813
PK		 263 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
264 vote ? "true" : "false");
0ff252c1
BYTK		 265
266 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
267
268 if (new_vote) {
269 qca->votes_on++;
270 qca->vote_off_ms += diff;
271 } else {
272 qca->votes_off++;
273 qca->vote_on_ms += diff;
274 }
275 qca->vote_last_jif = jiffies;
276 }
277}
278
279/* Builds and sends an HCI_IBS command packet.
280 * These are very simple packets with only 1 cmd byte.
281 */
282static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
283{
284 int err = 0;
285 struct sk_buff *skb = NULL;
286 struct qca_data *qca = hu->priv;
287
288 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
289
290 skb = bt_skb_alloc(1, GFP_ATOMIC);
291 if (!skb) {
292 BT_ERR("Failed to allocate memory for HCI_IBS packet");
293 return -ENOMEM;
294 }
295
296 /* Assign HCI_IBS type */
634fef61 297 skb_put_u8(skb, cmd);
0ff252c1
BYTK		 298
299 skb_queue_tail(&qca->txq, skb);
300
301 return err;
302}
303
304static void qca_wq_awake_device(struct work_struct *work)
305{
306 struct qca_data *qca = container_of(work, struct qca_data,
307 ws_awake_device);
308 struct hci_uart *hu = qca->hu;
309 unsigned long retrans_delay;
310
311 BT_DBG("hu %p wq awake device", hu);
312
313 /* Vote for serial clock */
314 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
315
316 spin_lock(&qca->hci_ibs_lock);
317
318 /* Send wake indication to device */
319 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
320 BT_ERR("Failed to send WAKE to device");
321
322 qca->ibs_sent_wakes++;
323
324 /* Start retransmit timer */
325 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
326 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
327
328 spin_unlock(&qca->hci_ibs_lock);
329
330 /* Actually send the packets */
331 hci_uart_tx_wakeup(hu);
332}
333
334static void qca_wq_awake_rx(struct work_struct *work)
335{
336 struct qca_data *qca = container_of(work, struct qca_data,
337 ws_awake_rx);
338 struct hci_uart *hu = qca->hu;
339
340 BT_DBG("hu %p wq awake rx", hu);
341
342 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
343
344 spin_lock(&qca->hci_ibs_lock);
345 qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
346
347 /* Always acknowledge device wake up,
348 * sending IBS message doesn't count as TX ON.
349 */
350 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
351 BT_ERR("Failed to acknowledge device wake up");
352
353 qca->ibs_sent_wacks++;
354
355 spin_unlock(&qca->hci_ibs_lock);
356
357 /* Actually send the packets */
358 hci_uart_tx_wakeup(hu);
359}
360
361static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
362{
363 struct qca_data *qca = container_of(work, struct qca_data,
364 ws_rx_vote_off);
365 struct hci_uart *hu = qca->hu;
366
367 BT_DBG("hu %p rx clock vote off", hu);
368
369 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
370}
371
372static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
373{
374 struct qca_data *qca = container_of(work, struct qca_data,
375 ws_tx_vote_off);
376 struct hci_uart *hu = qca->hu;
377
378 BT_DBG("hu %p tx clock vote off", hu);
379
380 /* Run HCI tx handling unlocked */
381 hci_uart_tx_wakeup(hu);
382
383 /* Now that message queued to tty driver, vote for tty clocks off.
384 * It is up to the tty driver to pend the clocks off until tx done.
385 */
386 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
387}
388
04356052 389static void hci_ibs_tx_idle_timeout(struct timer_list *t)
0ff252c1 390{
04356052
KC		 391 struct qca_data *qca = from_timer(qca, t, tx_idle_timer);
392 struct hci_uart *hu = qca->hu;
0ff252c1
BYTK		 393 unsigned long flags;
394
395 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
396
397 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
398 flags, SINGLE_DEPTH_NESTING);
399
400 switch (qca->tx_ibs_state) {
401 case HCI_IBS_TX_AWAKE:
402 /* TX_IDLE, go to SLEEP */
403 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
404 BT_ERR("Failed to send SLEEP to device");
405 break;
406 }
407 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
408 qca->ibs_sent_slps++;
409 queue_work(qca->workqueue, &qca->ws_tx_vote_off);
410 break;
411
412 case HCI_IBS_TX_ASLEEP:
413 case HCI_IBS_TX_WAKING:
414 /* Fall through */
415
416 default:
e059a465 417 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
0ff252c1
BYTK		 418 break;
419 }
420
421 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
422}
423
04356052 424static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
0ff252c1 425{
04356052
KC		 426 struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);
427 struct hci_uart *hu = qca->hu;
0ff252c1 428 unsigned long flags, retrans_delay;
a9137188 429 bool retransmit = false;
0ff252c1
BYTK		 430
431 BT_DBG("hu %p wake retransmit timeout in %d state",
432 hu, qca->tx_ibs_state);
433
434 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
435 flags, SINGLE_DEPTH_NESTING);
436
437 switch (qca->tx_ibs_state) {
438 case HCI_IBS_TX_WAKING:
439 /* No WAKE_ACK, retransmit WAKE */
a9137188 440 retransmit = true;
0ff252c1
BYTK		 441 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
442 BT_ERR("Failed to acknowledge device wake up");
443 break;
444 }
445 qca->ibs_sent_wakes++;
446 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
447 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
448 break;
449
450 case HCI_IBS_TX_ASLEEP:
451 case HCI_IBS_TX_AWAKE:
452 /* Fall through */
453
454 default:
e059a465 455 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
0ff252c1
BYTK		 456 break;
457 }
458
459 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
460
461 if (retransmit)
462 hci_uart_tx_wakeup(hu);
463}
464
465/* Initialize protocol */
466static int qca_open(struct hci_uart *hu)
467{
05ba533c 468 struct qca_serdev *qcadev;
0ff252c1 469 struct qca_data *qca;
fa9ad876 470 int ret;
0ff252c1
BYTK		 471
472 BT_DBG("hu %p qca_open", hu);
473
25a13e38 474 qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL);
0ff252c1
BYTK		 475 if (!qca)
476 return -ENOMEM;
477
478 skb_queue_head_init(&qca->txq);
479 skb_queue_head_init(&qca->tx_wait_q);
480 spin_lock_init(&qca->hci_ibs_lock);
fac9a602 481 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);
0ff252c1
BYTK		 482 if (!qca->workqueue) {
483 BT_ERR("QCA Workqueue not initialized properly");
484 kfree(qca);
485 return -ENOMEM;
486 }
487
488 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
489 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
490 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
491 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
492
493 qca->hu = hu;
494
495 /* Assume we start with both sides asleep -- extra wakes OK */
496 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
497 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
498
499 /* clocks actually on, but we start votes off */
500 qca->tx_vote = false;
501 qca->rx_vote = false;
502 qca->flags = 0;
503
504 qca->ibs_sent_wacks = 0;
505 qca->ibs_sent_slps = 0;
506 qca->ibs_sent_wakes = 0;
507 qca->ibs_recv_wacks = 0;
508 qca->ibs_recv_slps = 0;
509 qca->ibs_recv_wakes = 0;
510 qca->vote_last_jif = jiffies;
511 qca->vote_on_ms = 0;
512 qca->vote_off_ms = 0;
513 qca->votes_on = 0;
514 qca->votes_off = 0;
515 qca->tx_votes_on = 0;
516 qca->tx_votes_off = 0;
517 qca->rx_votes_on = 0;
518 qca->rx_votes_off = 0;
519
520 hu->priv = qca;
521
05ba533c 522 if (hu->serdev) {
05ba533c
TE		 523
524 qcadev = serdev_device_get_drvdata(hu->serdev);
523760b7 525 if (!qca_is_wcn399x(qcadev->btsoc_type)) {
fa9ad876 526 gpiod_set_value_cansleep(qcadev->bt_en, 1);
7f09d5a6
BG		 527 /* Controller needs time to bootup. */
528 msleep(150);
fa9ad876
BG		 529 } else {
530 hu->init_speed = qcadev->init_speed;
531 hu->oper_speed = qcadev->oper_speed;
532 ret = qca_power_setup(hu, true);
533 if (ret) {
534 destroy_workqueue(qca->workqueue);
535 kfree_skb(qca->rx_skb);
536 hu->priv = NULL;
537 kfree(qca);
538 return ret;
539 }
540 }
05ba533c
TE		 541 }
542
fa9ad876
BG		 543 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
544 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
545
546 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
547 qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS;
548
0ff252c1
BYTK		 549 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
550 qca->tx_idle_delay, qca->wake_retrans);
551
552 return 0;
553}
554
555static void qca_debugfs_init(struct hci_dev *hdev)
556{
557 struct hci_uart *hu = hci_get_drvdata(hdev);
558 struct qca_data *qca = hu->priv;
559 struct dentry *ibs_dir;
560 umode_t mode;
561
562 if (!hdev->debugfs)
563 return;
564
565 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
566
567 /* read only */
568 mode = S_IRUGO;
569 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
570 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
571 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
572 &qca->ibs_sent_slps);
573 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
574 &qca->ibs_sent_wakes);
575 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
576 &qca->ibs_sent_wacks);
577 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
578 &qca->ibs_recv_slps);
579 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
580 &qca->ibs_recv_wakes);
581 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
582 &qca->ibs_recv_wacks);
10be6c0f 583 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
0ff252c1
BYTK		 584 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
585 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
10be6c0f 586 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
0ff252c1
BYTK		 587 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
588 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
589 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
590 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
591 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
592 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
593
594 /* read/write */
595 mode = S_IRUGO | S_IWUSR;
596 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
597 debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
598 &qca->tx_idle_delay);
599}
600
601/* Flush protocol data */
602static int qca_flush(struct hci_uart *hu)
603{
604 struct qca_data *qca = hu->priv;
605
606 BT_DBG("hu %p qca flush", hu);
607
608 skb_queue_purge(&qca->tx_wait_q);
609 skb_queue_purge(&qca->txq);
610
611 return 0;
612}
613
614/* Close protocol */
615static int qca_close(struct hci_uart *hu)
616{
05ba533c 617 struct qca_serdev *qcadev;
0ff252c1
BYTK		 618 struct qca_data *qca = hu->priv;
619
620 BT_DBG("hu %p qca close", hu);
621
622 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
623
624 skb_queue_purge(&qca->tx_wait_q);
625 skb_queue_purge(&qca->txq);
626 del_timer(&qca->tx_idle_timer);
627 del_timer(&qca->wake_retrans_timer);
628 destroy_workqueue(qca->workqueue);
629 qca->hu = NULL;
630
05ba533c 631 if (hu->serdev) {
05ba533c 632 qcadev = serdev_device_get_drvdata(hu->serdev);
523760b7 633 if (qca_is_wcn399x(qcadev->btsoc_type))
c2d78273 634 qca_power_shutdown(hu);
fa9ad876
BG		 635 else
636 gpiod_set_value_cansleep(qcadev->bt_en, 0);
637
05ba533c
TE		 638 }
639
0ff252c1
BYTK		 640 kfree_skb(qca->rx_skb);
641
642 hu->priv = NULL;
643
644 kfree(qca);
645
646 return 0;
647}
648
649/* Called upon a wake-up-indication from the device.
650 */
651static void device_want_to_wakeup(struct hci_uart *hu)
652{
653 unsigned long flags;
654 struct qca_data *qca = hu->priv;
655
656 BT_DBG("hu %p want to wake up", hu);
657
658 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
659
660 qca->ibs_recv_wakes++;
661
662 switch (qca->rx_ibs_state) {
663 case HCI_IBS_RX_ASLEEP:
664 /* Make sure clock is on - we may have turned clock off since
665 * receiving the wake up indicator awake rx clock.
666 */
667 queue_work(qca->workqueue, &qca->ws_awake_rx);
668 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
669 return;
670
671 case HCI_IBS_RX_AWAKE:
672 /* Always acknowledge device wake up,
673 * sending IBS message doesn't count as TX ON.
674 */
675 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
676 BT_ERR("Failed to acknowledge device wake up");
677 break;
678 }
679 qca->ibs_sent_wacks++;
680 break;
681
682 default:
683 /* Any other state is illegal */
684 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
685 qca->rx_ibs_state);
686 break;
687 }
688
689 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
690
691 /* Actually send the packets */
692 hci_uart_tx_wakeup(hu);
693}
694
695/* Called upon a sleep-indication from the device.
696 */
697static void device_want_to_sleep(struct hci_uart *hu)
698{
699 unsigned long flags;
700 struct qca_data *qca = hu->priv;
701
702 BT_DBG("hu %p want to sleep", hu);
703
704 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
705
706 qca->ibs_recv_slps++;
707
708 switch (qca->rx_ibs_state) {
709 case HCI_IBS_RX_AWAKE:
710 /* Update state */
711 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
712 /* Vote off rx clock under workqueue */
713 queue_work(qca->workqueue, &qca->ws_rx_vote_off);
714 break;
715
716 case HCI_IBS_RX_ASLEEP:
717 /* Fall through */
718
719 default:
720 /* Any other state is illegal */
721 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
722 qca->rx_ibs_state);
723 break;
724 }
725
726 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
727}
728
729/* Called upon wake-up-acknowledgement from the device
730 */
731static void device_woke_up(struct hci_uart *hu)
732{
733 unsigned long flags, idle_delay;
734 struct qca_data *qca = hu->priv;
735 struct sk_buff *skb = NULL;
736
737 BT_DBG("hu %p woke up", hu);
738
739 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
740
741 qca->ibs_recv_wacks++;
742
743 switch (qca->tx_ibs_state) {
744 case HCI_IBS_TX_AWAKE:
745 /* Expect one if we send 2 WAKEs */
746 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
747 qca->tx_ibs_state);
748 break;
749
750 case HCI_IBS_TX_WAKING:
751 /* Send pending packets */
752 while ((skb = skb_dequeue(&qca->tx_wait_q)))
753 skb_queue_tail(&qca->txq, skb);
754
755 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
756 del_timer(&qca->wake_retrans_timer);
757 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
758 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
759 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
760 break;
761
762 case HCI_IBS_TX_ASLEEP:
763 /* Fall through */
764
765 default:
766 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
767 qca->tx_ibs_state);
768 break;
769 }
770
771 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
772
773 /* Actually send the packets */
774 hci_uart_tx_wakeup(hu);
775}
776
777/* Enqueue frame for transmittion (padding, crc, etc) may be called from
778 * two simultaneous tasklets.
779 */
780static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
781{
782 unsigned long flags = 0, idle_delay;
783 struct qca_data *qca = hu->priv;
784
785 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
786 qca->tx_ibs_state);
787
788 /* Prepend skb with frame type */
618e8bc2 789 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
0ff252c1 790
035a960e
BG		 791 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
792
0ff252c1
BYTK		 793 /* Don't go to sleep in middle of patch download or
794 * Out-Of-Band(GPIOs control) sleep is selected.
795 */
62a91990 796 if (!test_bit(QCA_IBS_ENABLED, &qca->flags)) {
0ff252c1 797 skb_queue_tail(&qca->txq, skb);
035a960e 798 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
0ff252c1
BYTK		 799 return 0;
800 }
801
0ff252c1
BYTK		 802 /* Act according to current state */
803 switch (qca->tx_ibs_state) {
804 case HCI_IBS_TX_AWAKE:
805 BT_DBG("Device awake, sending normally");
806 skb_queue_tail(&qca->txq, skb);
807 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
808 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
809 break;
810
811 case HCI_IBS_TX_ASLEEP:
812 BT_DBG("Device asleep, waking up and queueing packet");
813 /* Save packet for later */
814 skb_queue_tail(&qca->tx_wait_q, skb);
815
816 qca->tx_ibs_state = HCI_IBS_TX_WAKING;
817 /* Schedule a work queue to wake up device */
818 queue_work(qca->workqueue, &qca->ws_awake_device);
819 break;
820
821 case HCI_IBS_TX_WAKING:
822 BT_DBG("Device waking up, queueing packet");
823 /* Transient state; just keep packet for later */
824 skb_queue_tail(&qca->tx_wait_q, skb);
825 break;
826
827 default:
828 BT_ERR("Illegal tx state: %d (losing packet)",
829 qca->tx_ibs_state);
830 kfree_skb(skb);
831 break;
832 }
833
834 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
835
836 return 0;
837}
838
839static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
840{
841 struct hci_uart *hu = hci_get_drvdata(hdev);
842
843 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
844
845 device_want_to_sleep(hu);
846
847 kfree_skb(skb);
848 return 0;
849}
850
851static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
852{
853 struct hci_uart *hu = hci_get_drvdata(hdev);
854
855 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
856
857 device_want_to_wakeup(hu);
858
859 kfree_skb(skb);
860 return 0;
861}
862
863static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
864{
865 struct hci_uart *hu = hci_get_drvdata(hdev);
866
867 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
868
869 device_woke_up(hu);
870
871 kfree_skb(skb);
872 return 0;
873}
874
c614ca3f
BG		 875static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb)
876{
877 /* We receive debug logs from chip as an ACL packets.
878 * Instead of sending the data to ACL to decode the
879 * received data, we are pushing them to the above layers
880 * as a diagnostic packet.
881 */
882 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE)
883 return hci_recv_diag(hdev, skb);
884
885 return hci_recv_frame(hdev, skb);
886}
887
0ff252c1
BYTK		 888#define QCA_IBS_SLEEP_IND_EVENT \
889 .type = HCI_IBS_SLEEP_IND, \
890 .hlen = 0, \
891 .loff = 0, \
892 .lsize = 0, \
893 .maxlen = HCI_MAX_IBS_SIZE
894
895#define QCA_IBS_WAKE_IND_EVENT \
896 .type = HCI_IBS_WAKE_IND, \
897 .hlen = 0, \
898 .loff = 0, \
899 .lsize = 0, \
900 .maxlen = HCI_MAX_IBS_SIZE
901
902#define QCA_IBS_WAKE_ACK_EVENT \
903 .type = HCI_IBS_WAKE_ACK, \
904 .hlen = 0, \
905 .loff = 0, \
906 .lsize = 0, \
907 .maxlen = HCI_MAX_IBS_SIZE
908
909static const struct h4_recv_pkt qca_recv_pkts[] = {
c614ca3f 910 { H4_RECV_ACL, .recv = qca_recv_acl_data },
0ff252c1
BYTK		 911 { H4_RECV_SCO, .recv = hci_recv_frame },
912 { H4_RECV_EVENT, .recv = hci_recv_frame },
913 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind },
914 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack },
915 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
916};
917
918static int qca_recv(struct hci_uart *hu, const void *data, int count)
919{
920 struct qca_data *qca = hu->priv;
921
922 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
923 return -EUNATCH;
924
925 qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
926 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
927 if (IS_ERR(qca->rx_skb)) {
928 int err = PTR_ERR(qca->rx_skb);
2064ee33 929 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
0ff252c1
BYTK		 930 qca->rx_skb = NULL;
931 return err;
932 }
933
934 return count;
935}
936
937static struct sk_buff *qca_dequeue(struct hci_uart *hu)
938{
939 struct qca_data *qca = hu->priv;
940
941 return skb_dequeue(&qca->txq);
942}
943
944static uint8_t qca_get_baudrate_value(int speed)
945{
ce26d813 946 switch (speed) {
0ff252c1
BYTK		 947 case 9600:
948 return QCA_BAUDRATE_9600;
949 case 19200:
950 return QCA_BAUDRATE_19200;
951 case 38400:
952 return QCA_BAUDRATE_38400;
953 case 57600:
954 return QCA_BAUDRATE_57600;
955 case 115200:
956 return QCA_BAUDRATE_115200;
957 case 230400:
958 return QCA_BAUDRATE_230400;
959 case 460800:
960 return QCA_BAUDRATE_460800;
961 case 500000:
962 return QCA_BAUDRATE_500000;
963 case 921600:
964 return QCA_BAUDRATE_921600;
965 case 1000000:
966 return QCA_BAUDRATE_1000000;
967 case 2000000:
968 return QCA_BAUDRATE_2000000;
969 case 3000000:
970 return QCA_BAUDRATE_3000000;
be93a497
BG		 971 case 3200000:
972 return QCA_BAUDRATE_3200000;
0ff252c1
BYTK		 973 case 3500000:
974 return QCA_BAUDRATE_3500000;
975 default:
976 return QCA_BAUDRATE_115200;
977 }
978}
979
980static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
981{
982 struct hci_uart *hu = hci_get_drvdata(hdev);
983 struct qca_data *qca = hu->priv;
984 struct sk_buff *skb;
985 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
986
be93a497 987 if (baudrate > QCA_BAUDRATE_3200000)
0ff252c1
BYTK		 988 return -EINVAL;
989
990 cmd[4] = baudrate;
991
25a13e38 992 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
0ff252c1 993 if (!skb) {
2064ee33 994 bt_dev_err(hdev, "Failed to allocate baudrate packet");
0ff252c1
BYTK		 995 return -ENOMEM;
996 }
997
998 /* Assign commands to change baudrate and packet type. */
59ae1d12 999 skb_put_data(skb, cmd, sizeof(cmd));
618e8bc2 1000 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
0ff252c1
BYTK		 1001
1002 skb_queue_tail(&qca->txq, skb);
1003 hci_uart_tx_wakeup(hu);
1004
94d66714
MK		 1005 /* Wait for the baudrate change request to be sent */
1006
1007 while (!skb_queue_empty(&qca->txq))
1008 usleep_range(100, 200);
1009
ecf2b768
MK		 1010 if (hu->serdev)
1011 serdev_device_wait_until_sent(hu->serdev,
94d66714
MK		 1012 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
1013
1014 /* Give the controller time to process the request */
523760b7 1015 if (qca_is_wcn399x(qca_soc_type(hu)))
94d66714
MK		 1016 msleep(10);
1017 else
1018 msleep(300);
0ff252c1
BYTK		 1019
1020 return 0;
1021}
1022
05ba533c
TE		 1023static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
1024{
1025 if (hu->serdev)
1026 serdev_device_set_baudrate(hu->serdev, speed);
1027 else
1028 hci_uart_set_baudrate(hu, speed);
1029}
1030
9836b802 1031static int qca_send_power_pulse(struct hci_uart *hu, bool on)
fa9ad876 1032{
f9558270 1033 int ret;
94d66714 1034 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
9836b802 1035 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;
fa9ad876
BG		 1036
1037 /* These power pulses are single byte command which are sent
1038 * at required baudrate to wcn3990. On wcn3990, we have an external
1039 * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1040 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1041 * and also we use the same power inputs to turn on and off for
1042 * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1043 * we send a power on pulse at 115200 bps. This algorithm will help to
1044 * save power. Disabling hardware flow control is mandatory while
1045 * sending power pulses to SoC.
1046 */
f9558270 1047 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);
fa9ad876 1048
f9558270 1049 serdev_device_write_flush(hu->serdev);
fa9ad876 1050 hci_uart_set_flow_control(hu, true);
f9558270
BG		 1051 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
1052 if (ret < 0) {
1053 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);
1054 return ret;
1055 }
fa9ad876 1056
f9558270 1057 serdev_device_wait_until_sent(hu->serdev, timeout);
fa9ad876
BG		 1058 hci_uart_set_flow_control(hu, false);
1059
0ebcddd8 1060 /* Give to controller time to boot/shutdown */
ad571d72
MK		 1061 if (on)
1062 msleep(100);
0ebcddd8
MK		 1063 else
1064 msleep(10);
ad571d72 1065
fa9ad876
BG		 1066 return 0;
1067}
1068
83d9c5e5
BG		 1069static unsigned int qca_get_speed(struct hci_uart *hu,
1070 enum qca_speed_type speed_type)
1071{
1072 unsigned int speed = 0;
1073
1074 if (speed_type == QCA_INIT_SPEED) {
1075 if (hu->init_speed)
1076 speed = hu->init_speed;
1077 else if (hu->proto->init_speed)
1078 speed = hu->proto->init_speed;
1079 } else {
1080 if (hu->oper_speed)
1081 speed = hu->oper_speed;
1082 else if (hu->proto->oper_speed)
1083 speed = hu->proto->oper_speed;
1084 }
1085
1086 return speed;
1087}
1088
1089static int qca_check_speeds(struct hci_uart *hu)
1090{
523760b7 1091 if (qca_is_wcn399x(qca_soc_type(hu))) {
fa9ad876
BG		 1092 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
1093 !qca_get_speed(hu, QCA_OPER_SPEED))
1094 return -EINVAL;
1095 } else {
1096 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
1097 !qca_get_speed(hu, QCA_OPER_SPEED))
1098 return -EINVAL;
1099 }
83d9c5e5
BG		 1100
1101 return 0;
1102}
1103
1104static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
1105{
1106 unsigned int speed, qca_baudrate;
78e8fa29 1107 int ret = 0;
83d9c5e5
BG		 1108
1109 if (speed_type == QCA_INIT_SPEED) {
1110 speed = qca_get_speed(hu, QCA_INIT_SPEED);
1111 if (speed)
1112 host_set_baudrate(hu, speed);
1113 } else {
4fdd5a4f
MK		 1114 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1115
83d9c5e5
BG		 1116 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1117 if (!speed)
1118 return 0;
1119
78e8fa29
BG		 1120 /* Disable flow control for wcn3990 to deassert RTS while
1121 * changing the baudrate of chip and host.
1122 */
523760b7 1123 if (qca_is_wcn399x(soc_type))
78e8fa29
BG		 1124 hci_uart_set_flow_control(hu, true);
1125
83d9c5e5 1126 qca_baudrate = qca_get_baudrate_value(speed);
fa9ad876 1127 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
83d9c5e5
BG		 1128 ret = qca_set_baudrate(hu->hdev, qca_baudrate);
1129 if (ret)
78e8fa29 1130 goto error;
83d9c5e5
BG		 1131
1132 host_set_baudrate(hu, speed);
78e8fa29
BG		 1133
1134error:
523760b7 1135 if (qca_is_wcn399x(soc_type))
78e8fa29 1136 hci_uart_set_flow_control(hu, false);
83d9c5e5
BG		 1137 }
1138
78e8fa29 1139 return ret;
83d9c5e5
BG		 1140}
1141
fa9ad876
BG		 1142static int qca_wcn3990_init(struct hci_uart *hu)
1143{
3e4be65e 1144 struct qca_serdev *qcadev;
fa9ad876
BG		 1145 int ret;
1146
3e4be65e
BG		 1147 /* Check for vregs status, may be hci down has turned
1148 * off the voltage regulator.
1149 */
1150 qcadev = serdev_device_get_drvdata(hu->serdev);
1151 if (!qcadev->bt_power->vregs_on) {
1152 serdev_device_close(hu->serdev);
1153 ret = qca_power_setup(hu, true);
1154 if (ret)
1155 return ret;
1156
1157 ret = serdev_device_open(hu->serdev);
1158 if (ret) {
1159 bt_dev_err(hu->hdev, "failed to open port");
1160 return ret;
1161 }
1162 }
1163
fa9ad876
BG		 1164 /* Forcefully enable wcn3990 to enter in to boot mode. */
1165 host_set_baudrate(hu, 2400);
9836b802 1166 ret = qca_send_power_pulse(hu, false);
fa9ad876
BG		 1167 if (ret)
1168 return ret;
1169
1170 qca_set_speed(hu, QCA_INIT_SPEED);
9836b802 1171 ret = qca_send_power_pulse(hu, true);
fa9ad876
BG		 1172 if (ret)
1173 return ret;
1174
fa9ad876
BG		 1175 /* Now the device is in ready state to communicate with host.
1176 * To sync host with device we need to reopen port.
1177 * Without this, we will have RTS and CTS synchronization
1178 * issues.
1179 */
1180 serdev_device_close(hu->serdev);
1181 ret = serdev_device_open(hu->serdev);
1182 if (ret) {
1183 bt_dev_err(hu->hdev, "failed to open port");
1184 return ret;
1185 }
1186
1187 hci_uart_set_flow_control(hu, false);
1188
1189 return 0;
1190}
1191
0ff252c1
BYTK		 1192static int qca_setup(struct hci_uart *hu)
1193{
1194 struct hci_dev *hdev = hu->hdev;
1195 struct qca_data *qca = hu->priv;
1196 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
4fdd5a4f 1197 enum qca_btsoc_type soc_type = qca_soc_type(hu);
0ff252c1 1198 int ret;
aadebac4 1199 int soc_ver = 0;
0ff252c1 1200
83d9c5e5
BG		 1201 ret = qca_check_speeds(hu);
1202 if (ret)
1203 return ret;
1204
0ff252c1 1205 /* Patch downloading has to be done without IBS mode */
62a91990 1206 clear_bit(QCA_IBS_ENABLED, &qca->flags);
0ff252c1 1207
523760b7 1208 if (qca_is_wcn399x(soc_type)) {
fa9ad876 1209 bt_dev_info(hdev, "setting up wcn3990");
3e4be65e
BG		 1210
1211 /* Enable NON_PERSISTENT_SETUP QUIRK to ensure to execute
1212 * setup for every hci up.
1213 */
1214 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
5971752d 1215 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
3e4be65e 1216 hu->hdev->shutdown = qca_power_off;
fa9ad876
BG		 1217 ret = qca_wcn3990_init(hu);
1218 if (ret)
1219 return ret;
1220
1221 ret = qca_read_soc_version(hdev, &soc_ver);
1222 if (ret)
1223 return ret;
1224 } else {
1225 bt_dev_info(hdev, "ROME setup");
1226 qca_set_speed(hu, QCA_INIT_SPEED);
1227 }
0ff252c1
BYTK		 1228
1229 /* Setup user speed if needed */
83d9c5e5 1230 speed = qca_get_speed(hu, QCA_OPER_SPEED);
0ff252c1 1231 if (speed) {
83d9c5e5
BG		 1232 ret = qca_set_speed(hu, QCA_OPER_SPEED);
1233 if (ret)
0ff252c1 1234 return ret;
83d9c5e5
BG		 1235
1236 qca_baudrate = qca_get_baudrate_value(speed);
0ff252c1
BYTK		 1237 }
1238
523760b7 1239 if (!qca_is_wcn399x(soc_type)) {
fa9ad876
BG		 1240 /* Get QCA version information */
1241 ret = qca_read_soc_version(hdev, &soc_ver);
1242 if (ret)
1243 return ret;
1244 }
aadebac4
BG		 1245
1246 bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
0ff252c1 1247 /* Setup patch / NVM configurations */
4fdd5a4f 1248 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver);
0ff252c1 1249 if (!ret) {
62a91990 1250 set_bit(QCA_IBS_ENABLED, &qca->flags);
0ff252c1 1251 qca_debugfs_init(hdev);
ba8f3597
LP		 1252 } else if (ret == -ENOENT) {
1253 /* No patch/nvm-config found, run with original fw/config */
1254 ret = 0;
7dc5fe08
AP		 1255 } else if (ret == -EAGAIN) {
1256 /*
1257 * Userspace firmware loader will return -EAGAIN in case no
1258 * patch/nvm-config is found, so run with original fw/config.
1259 */
1260 ret = 0;
0ff252c1
BYTK		 1261 }
1262
1263 /* Setup bdaddr */
523760b7 1264 if (qca_is_wcn399x(soc_type))
5c0a1001
BG		 1265 hu->hdev->set_bdaddr = qca_set_bdaddr;
1266 else
1267 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
0ff252c1
BYTK		 1268
1269 return ret;
1270}
1271
1272static struct hci_uart_proto qca_proto = {
1273 .id = HCI_UART_QCA,
1274 .name = "QCA",
aee61f7a 1275 .manufacturer = 29,
0ff252c1
BYTK		 1276 .init_speed = 115200,
1277 .oper_speed = 3000000,
1278 .open = qca_open,
1279 .close = qca_close,
1280 .flush = qca_flush,
1281 .setup = qca_setup,
1282 .recv = qca_recv,
1283 .enqueue = qca_enqueue,
1284 .dequeue = qca_dequeue,
1285};
1286
523760b7 1287static const struct qca_vreg_data qca_soc_data_wcn3990 = {
fa9ad876
BG		 1288 .soc_type = QCA_WCN3990,
1289 .vregs = (struct qca_vreg []) {
1290 { "vddio", 1800000, 1900000, 15000 },
1291 { "vddxo", 1800000, 1900000, 80000 },
1292 { "vddrf", 1300000, 1350000, 300000 },
1293 { "vddch0", 3300000, 3400000, 450000 },
1294 },
1295 .num_vregs = 4,
1296};
1297
523760b7
HB		 1298static const struct qca_vreg_data qca_soc_data_wcn3998 = {
1299 .soc_type = QCA_WCN3998,
1300 .vregs = (struct qca_vreg []) {
1301 { "vddio", 1800000, 1900000, 10000 },
1302 { "vddxo", 1800000, 1900000, 80000 },
1303 { "vddrf", 1300000, 1352000, 300000 },
1304 { "vddch0", 3300000, 3300000, 450000 },
1305 },
1306 .num_vregs = 4,
1307};
1308
c2d78273 1309static void qca_power_shutdown(struct hci_uart *hu)
fa9ad876 1310{
035a960e
BG		 1311 struct qca_data *qca = hu->priv;
1312 unsigned long flags;
1313
1314 /* From this point we go into power off state. But serial port is
1315 * still open, stop queueing the IBS data and flush all the buffered
1316 * data in skb's.
1317 */
1318 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
62a91990 1319 clear_bit(QCA_IBS_ENABLED, &qca->flags);
035a960e
BG		 1320 qca_flush(hu);
1321 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
1322
fa9ad876 1323 host_set_baudrate(hu, 2400);
9836b802 1324 qca_send_power_pulse(hu, false);
fa9ad876
BG		 1325 qca_power_setup(hu, false);
1326}
1327
3e4be65e
BG		 1328static int qca_power_off(struct hci_dev *hdev)
1329{
1330 struct hci_uart *hu = hci_get_drvdata(hdev);
1331
1332 qca_power_shutdown(hu);
1333 return 0;
1334}
1335
fa9ad876
BG		 1336static int qca_enable_regulator(struct qca_vreg vregs,
1337 struct regulator *regulator)
1338{
1339 int ret;
1340
1341 ret = regulator_set_voltage(regulator, vregs.min_uV,
1342 vregs.max_uV);
1343 if (ret)
1344 return ret;
1345
1346 if (vregs.load_uA)
1347 ret = regulator_set_load(regulator,
1348 vregs.load_uA);
1349
1350 if (ret)
1351 return ret;
1352
1353 return regulator_enable(regulator);
1354
1355}
1356
1357static void qca_disable_regulator(struct qca_vreg vregs,
1358 struct regulator *regulator)
1359{
1360 regulator_disable(regulator);
1361 regulator_set_voltage(regulator, 0, vregs.max_uV);
1362 if (vregs.load_uA)
1363 regulator_set_load(regulator, 0);
1364
1365}
1366
1367static int qca_power_setup(struct hci_uart *hu, bool on)
1368{
1369 struct qca_vreg *vregs;
1370 struct regulator_bulk_data *vreg_bulk;
1371 struct qca_serdev *qcadev;
1372 int i, num_vregs, ret = 0;
1373
1374 qcadev = serdev_device_get_drvdata(hu->serdev);
1375 if (!qcadev || !qcadev->bt_power || !qcadev->bt_power->vreg_data ||
1376 !qcadev->bt_power->vreg_bulk)
1377 return -EINVAL;
1378
1379 vregs = qcadev->bt_power->vreg_data->vregs;
1380 vreg_bulk = qcadev->bt_power->vreg_bulk;
1381 num_vregs = qcadev->bt_power->vreg_data->num_vregs;
1382 BT_DBG("on: %d", on);
1383 if (on && !qcadev->bt_power->vregs_on) {
1384 for (i = 0; i < num_vregs; i++) {
1385 ret = qca_enable_regulator(vregs[i],
1386 vreg_bulk[i].consumer);
1387 if (ret)
1388 break;
1389 }
1390
1391 if (ret) {
1392 BT_ERR("failed to enable regulator:%s", vregs[i].name);
1393 /* turn off regulators which are enabled */
1394 for (i = i - 1; i >= 0; i--)
1395 qca_disable_regulator(vregs[i],
1396 vreg_bulk[i].consumer);
1397 } else {
1398 qcadev->bt_power->vregs_on = true;
1399 }
1400 } else if (!on && qcadev->bt_power->vregs_on) {
1401 /* turn off regulator in reverse order */
1402 i = qcadev->bt_power->vreg_data->num_vregs - 1;
1403 for ( ; i >= 0; i--)
1404 qca_disable_regulator(vregs[i], vreg_bulk[i].consumer);
1405
1406 qcadev->bt_power->vregs_on = false;
1407 }
1408
1409 return ret;
1410}
1411
1412static int qca_init_regulators(struct qca_power *qca,
1413 const struct qca_vreg *vregs, size_t num_vregs)
1414{
1415 int i;
1416
329e0989 1417 qca->vreg_bulk = devm_kcalloc(qca->dev, num_vregs,
fa9ad876
BG		 1418 sizeof(struct regulator_bulk_data),
1419 GFP_KERNEL);
1420 if (!qca->vreg_bulk)
1421 return -ENOMEM;
1422
1423 for (i = 0; i < num_vregs; i++)
1424 qca->vreg_bulk[i].supply = vregs[i].name;
1425
1426 return devm_regulator_bulk_get(qca->dev, num_vregs, qca->vreg_bulk);
1427}
1428
05ba533c
TE		 1429static int qca_serdev_probe(struct serdev_device *serdev)
1430{
1431 struct qca_serdev *qcadev;
fa9ad876 1432 const struct qca_vreg_data *data;
05ba533c
TE		 1433 int err;
1434
1435 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
1436 if (!qcadev)
1437 return -ENOMEM;
1438
1439 qcadev->serdev_hu.serdev = serdev;
fa9ad876 1440 data = of_device_get_match_data(&serdev->dev);
05ba533c 1441 serdev_device_set_drvdata(serdev, qcadev);
523760b7
HB		 1442 if (data && qca_is_wcn399x(data->soc_type)) {
1443 qcadev->btsoc_type = data->soc_type;
fa9ad876
BG		 1444 qcadev->bt_power = devm_kzalloc(&serdev->dev,
1445 sizeof(struct qca_power),
1446 GFP_KERNEL);
1447 if (!qcadev->bt_power)
1448 return -ENOMEM;
1449
1450 qcadev->bt_power->dev = &serdev->dev;
1451 qcadev->bt_power->vreg_data = data;
1452 err = qca_init_regulators(qcadev->bt_power, data->vregs,
1453 data->num_vregs);
1454 if (err) {
1455 BT_ERR("Failed to init regulators:%d", err);
1456 goto out;
1457 }
05ba533c 1458
fa9ad876 1459 qcadev->bt_power->vregs_on = false;
05ba533c 1460
fa9ad876
BG		 1461 device_property_read_u32(&serdev->dev, "max-speed",
1462 &qcadev->oper_speed);
1463 if (!qcadev->oper_speed)
1464 BT_DBG("UART will pick default operating speed");
05ba533c 1465
fa9ad876
BG		 1466 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
1467 if (err) {
1468 BT_ERR("wcn3990 serdev registration failed");
1469 goto out;
1470 }
1471 } else {
1472 qcadev->btsoc_type = QCA_ROME;
1473 qcadev->bt_en = devm_gpiod_get(&serdev->dev, "enable",
1474 GPIOD_OUT_LOW);
1475 if (IS_ERR(qcadev->bt_en)) {
1476 dev_err(&serdev->dev, "failed to acquire enable gpio\n");
1477 return PTR_ERR(qcadev->bt_en);
1478 }
05ba533c 1479
fa9ad876
BG		 1480 qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
1481 if (IS_ERR(qcadev->susclk)) {
1482 dev_err(&serdev->dev, "failed to acquire clk\n");
1483 return PTR_ERR(qcadev->susclk);
1484 }
05ba533c 1485
fa9ad876
BG		 1486 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
1487 if (err)
1488 return err;
1489
1490 err = clk_prepare_enable(qcadev->susclk);
1491 if (err)
1492 return err;
1493
1494 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
1495 if (err)
1496 clk_disable_unprepare(qcadev->susclk);
1497 }
1498
1499out: return err;
05ba533c 1500
05ba533c
TE		 1501}
1502
1503static void qca_serdev_remove(struct serdev_device *serdev)
1504{
1505 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
1506
523760b7 1507 if (qca_is_wcn399x(qcadev->btsoc_type))
c2d78273 1508 qca_power_shutdown(&qcadev->serdev_hu);
fa9ad876
BG		 1509 else
1510 clk_disable_unprepare(qcadev->susclk);
05ba533c 1511
fa9ad876 1512 hci_uart_unregister_device(&qcadev->serdev_hu);
05ba533c
TE		 1513}
1514
1515static const struct of_device_id qca_bluetooth_of_match[] = {
1516 { .compatible = "qcom,qca6174-bt" },
523760b7
HB		 1517 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},
1518 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},
05ba533c
TE		 1519 { /* sentinel */ }
1520};
1521MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
1522
1523static struct serdev_device_driver qca_serdev_driver = {
1524 .probe = qca_serdev_probe,
1525 .remove = qca_serdev_remove,
1526 .driver = {
1527 .name = "hci_uart_qca",
1528 .of_match_table = qca_bluetooth_of_match,
1529 },
1530};
1531
0ff252c1
BYTK		 1532int __init qca_init(void)
1533{
05ba533c
TE		 1534 serdev_device_driver_register(&qca_serdev_driver);
1535
0ff252c1
BYTK		 1536 return hci_uart_register_proto(&qca_proto);
1537}
1538
1539int __exit qca_deinit(void)
1540{
05ba533c
TE		 1541 serdev_device_driver_unregister(&qca_serdev_driver);
1542
0ff252c1
BYTK		 1543 return hci_uart_unregister_proto(&qca_proto);
1544}
Linux 6.x block layer and io_uring tree(s)