projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Bluetooth: btusb: Add quirk for BTUSB_INTEL_NEW
[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>
0ff252c1
BYTK		 43
44#include <net/bluetooth/bluetooth.h>
45#include <net/bluetooth/hci_core.h>
46
47#include "hci_uart.h"
48#include "btqca.h"
49
50/* HCI_IBS protocol messages */
51#define HCI_IBS_SLEEP_IND 0xFE
52#define HCI_IBS_WAKE_IND 0xFD
53#define HCI_IBS_WAKE_ACK 0xFC
f81b001a 54#define HCI_MAX_IBS_SIZE 10
0ff252c1
BYTK		 55
56/* Controller states */
57#define STATE_IN_BAND_SLEEP_ENABLED 1
58
f81b001a
MH		 59#define IBS_WAKE_RETRANS_TIMEOUT_MS 100
60#define IBS_TX_IDLE_TIMEOUT_MS 2000
0ff252c1
BYTK		 61#define BAUDRATE_SETTLE_TIMEOUT_MS 300
62
05ba533c
TE		 63/* susclk rate */
64#define SUSCLK_RATE_32KHZ 32768
65
0ff252c1
BYTK		 66/* HCI_IBS transmit side sleep protocol states */
67enum tx_ibs_states {
68 HCI_IBS_TX_ASLEEP,
69 HCI_IBS_TX_WAKING,
70 HCI_IBS_TX_AWAKE,
71};
72
73/* HCI_IBS receive side sleep protocol states */
74enum rx_states {
75 HCI_IBS_RX_ASLEEP,
76 HCI_IBS_RX_AWAKE,
77};
78
79/* HCI_IBS transmit and receive side clock state vote */
80enum hci_ibs_clock_state_vote {
81 HCI_IBS_VOTE_STATS_UPDATE,
82 HCI_IBS_TX_VOTE_CLOCK_ON,
83 HCI_IBS_TX_VOTE_CLOCK_OFF,
84 HCI_IBS_RX_VOTE_CLOCK_ON,
85 HCI_IBS_RX_VOTE_CLOCK_OFF,
86};
87
88struct qca_data {
89 struct hci_uart *hu;
90 struct sk_buff *rx_skb;
91 struct sk_buff_head txq;
92 struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */
93 spinlock_t hci_ibs_lock; /* HCI_IBS state lock */
94 u8 tx_ibs_state; /* HCI_IBS transmit side power state*/
95 u8 rx_ibs_state; /* HCI_IBS receive side power state */
621a5f7a
VK		 96 bool tx_vote; /* Clock must be on for TX */
97 bool rx_vote; /* Clock must be on for RX */
0ff252c1
BYTK		 98 struct timer_list tx_idle_timer;
99 u32 tx_idle_delay;
100 struct timer_list wake_retrans_timer;
101 u32 wake_retrans;
102 struct workqueue_struct *workqueue;
103 struct work_struct ws_awake_rx;
104 struct work_struct ws_awake_device;
105 struct work_struct ws_rx_vote_off;
106 struct work_struct ws_tx_vote_off;
107 unsigned long flags;
108
109 /* For debugging purpose */
110 u64 ibs_sent_wacks;
111 u64 ibs_sent_slps;
112 u64 ibs_sent_wakes;
113 u64 ibs_recv_wacks;
114 u64 ibs_recv_slps;
115 u64 ibs_recv_wakes;
116 u64 vote_last_jif;
117 u32 vote_on_ms;
118 u32 vote_off_ms;
119 u64 tx_votes_on;
120 u64 rx_votes_on;
121 u64 tx_votes_off;
122 u64 rx_votes_off;
123 u64 votes_on;
124 u64 votes_off;
125};
126
83d9c5e5
BG		 127enum qca_speed_type {
128 QCA_INIT_SPEED = 1,
129 QCA_OPER_SPEED
130};
131
fa9ad876
BG		 132/*
133 * Voltage regulator information required for configuring the
134 * QCA Bluetooth chipset
135 */
136struct qca_vreg {
137 const char *name;
138 unsigned int min_uV;
139 unsigned int max_uV;
140 unsigned int load_uA;
141};
142
143struct qca_vreg_data {
144 enum qca_btsoc_type soc_type;
145 struct qca_vreg *vregs;
146 size_t num_vregs;
147};
148
149/*
150 * Platform data for the QCA Bluetooth power driver.
151 */
152struct qca_power {
153 struct device *dev;
154 const struct qca_vreg_data *vreg_data;
155 struct regulator_bulk_data *vreg_bulk;
156 bool vregs_on;
157};
158
05ba533c
TE		 159struct qca_serdev {
160 struct hci_uart serdev_hu;
161 struct gpio_desc *bt_en;
162 struct clk *susclk;
fa9ad876
BG		 163 enum qca_btsoc_type btsoc_type;
164 struct qca_power *bt_power;
165 u32 init_speed;
166 u32 oper_speed;
05ba533c
TE		 167};
168
fa9ad876 169static int qca_power_setup(struct hci_uart *hu, bool on);
c2d78273 170static void qca_power_shutdown(struct hci_uart *hu);
fa9ad876 171
0ff252c1
BYTK		 172static void __serial_clock_on(struct tty_struct *tty)
173{
174 /* TODO: Some chipset requires to enable UART clock on client
175 * side to save power consumption or manual work is required.
176 * Please put your code to control UART clock here if needed
177 */
178}
179
180static void __serial_clock_off(struct tty_struct *tty)
181{
182 /* TODO: Some chipset requires to disable UART clock on client
183 * side to save power consumption or manual work is required.
184 * Please put your code to control UART clock off here if needed
185 */
186}
187
188/* serial_clock_vote needs to be called with the ibs lock held */
189static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
190{
191 struct qca_data *qca = hu->priv;
192 unsigned int diff;
193
194 bool old_vote = (qca->tx_vote | qca->rx_vote);
195 bool new_vote;
196
197 switch (vote) {
198 case HCI_IBS_VOTE_STATS_UPDATE:
199 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
200
201 if (old_vote)
202 qca->vote_off_ms += diff;
203 else
204 qca->vote_on_ms += diff;
205 return;
206
207 case HCI_IBS_TX_VOTE_CLOCK_ON:
208 qca->tx_vote = true;
209 qca->tx_votes_on++;
210 new_vote = true;
211 break;
212
213 case HCI_IBS_RX_VOTE_CLOCK_ON:
214 qca->rx_vote = true;
215 qca->rx_votes_on++;
216 new_vote = true;
217 break;
218
219 case HCI_IBS_TX_VOTE_CLOCK_OFF:
220 qca->tx_vote = false;
221 qca->tx_votes_off++;
222 new_vote = qca->rx_vote | qca->tx_vote;
223 break;
224
225 case HCI_IBS_RX_VOTE_CLOCK_OFF:
226 qca->rx_vote = false;
227 qca->rx_votes_off++;
228 new_vote = qca->rx_vote | qca->tx_vote;
229 break;
230
231 default:
232 BT_ERR("Voting irregularity");
233 return;
234 }
235
236 if (new_vote != old_vote) {
237 if (new_vote)
238 __serial_clock_on(hu->tty);
239 else
240 __serial_clock_off(hu->tty);
241
ce26d813
PK		 242 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
243 vote ? "true" : "false");
0ff252c1
BYTK		 244
245 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
246
247 if (new_vote) {
248 qca->votes_on++;
249 qca->vote_off_ms += diff;
250 } else {
251 qca->votes_off++;
252 qca->vote_on_ms += diff;
253 }
254 qca->vote_last_jif = jiffies;
255 }
256}
257
258/* Builds and sends an HCI_IBS command packet.
259 * These are very simple packets with only 1 cmd byte.
260 */
261static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
262{
263 int err = 0;
264 struct sk_buff *skb = NULL;
265 struct qca_data *qca = hu->priv;
266
267 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
268
269 skb = bt_skb_alloc(1, GFP_ATOMIC);
270 if (!skb) {
271 BT_ERR("Failed to allocate memory for HCI_IBS packet");
272 return -ENOMEM;
273 }
274
275 /* Assign HCI_IBS type */
634fef61 276 skb_put_u8(skb, cmd);
0ff252c1
BYTK		 277
278 skb_queue_tail(&qca->txq, skb);
279
280 return err;
281}
282
283static void qca_wq_awake_device(struct work_struct *work)
284{
285 struct qca_data *qca = container_of(work, struct qca_data,
286 ws_awake_device);
287 struct hci_uart *hu = qca->hu;
288 unsigned long retrans_delay;
289
290 BT_DBG("hu %p wq awake device", hu);
291
292 /* Vote for serial clock */
293 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
294
295 spin_lock(&qca->hci_ibs_lock);
296
297 /* Send wake indication to device */
298 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
299 BT_ERR("Failed to send WAKE to device");
300
301 qca->ibs_sent_wakes++;
302
303 /* Start retransmit timer */
304 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
305 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
306
307 spin_unlock(&qca->hci_ibs_lock);
308
309 /* Actually send the packets */
310 hci_uart_tx_wakeup(hu);
311}
312
313static void qca_wq_awake_rx(struct work_struct *work)
314{
315 struct qca_data *qca = container_of(work, struct qca_data,
316 ws_awake_rx);
317 struct hci_uart *hu = qca->hu;
318
319 BT_DBG("hu %p wq awake rx", hu);
320
321 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
322
323 spin_lock(&qca->hci_ibs_lock);
324 qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
325
326 /* Always acknowledge device wake up,
327 * sending IBS message doesn't count as TX ON.
328 */
329 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
330 BT_ERR("Failed to acknowledge device wake up");
331
332 qca->ibs_sent_wacks++;
333
334 spin_unlock(&qca->hci_ibs_lock);
335
336 /* Actually send the packets */
337 hci_uart_tx_wakeup(hu);
338}
339
340static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
341{
342 struct qca_data *qca = container_of(work, struct qca_data,
343 ws_rx_vote_off);
344 struct hci_uart *hu = qca->hu;
345
346 BT_DBG("hu %p rx clock vote off", hu);
347
348 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
349}
350
351static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
352{
353 struct qca_data *qca = container_of(work, struct qca_data,
354 ws_tx_vote_off);
355 struct hci_uart *hu = qca->hu;
356
357 BT_DBG("hu %p tx clock vote off", hu);
358
359 /* Run HCI tx handling unlocked */
360 hci_uart_tx_wakeup(hu);
361
362 /* Now that message queued to tty driver, vote for tty clocks off.
363 * It is up to the tty driver to pend the clocks off until tx done.
364 */
365 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
366}
367
04356052 368static void hci_ibs_tx_idle_timeout(struct timer_list *t)
0ff252c1 369{
04356052
KC		 370 struct qca_data *qca = from_timer(qca, t, tx_idle_timer);
371 struct hci_uart *hu = qca->hu;
0ff252c1
BYTK		 372 unsigned long flags;
373
374 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
375
376 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
377 flags, SINGLE_DEPTH_NESTING);
378
379 switch (qca->tx_ibs_state) {
380 case HCI_IBS_TX_AWAKE:
381 /* TX_IDLE, go to SLEEP */
382 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
383 BT_ERR("Failed to send SLEEP to device");
384 break;
385 }
386 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
387 qca->ibs_sent_slps++;
388 queue_work(qca->workqueue, &qca->ws_tx_vote_off);
389 break;
390
391 case HCI_IBS_TX_ASLEEP:
392 case HCI_IBS_TX_WAKING:
393 /* Fall through */
394
395 default:
e059a465 396 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
0ff252c1
BYTK		 397 break;
398 }
399
400 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
401}
402
04356052 403static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
0ff252c1 404{
04356052
KC		 405 struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);
406 struct hci_uart *hu = qca->hu;
0ff252c1 407 unsigned long flags, retrans_delay;
a9137188 408 bool retransmit = false;
0ff252c1
BYTK		 409
410 BT_DBG("hu %p wake retransmit timeout in %d state",
411 hu, qca->tx_ibs_state);
412
413 spin_lock_irqsave_nested(&qca->hci_ibs_lock,
414 flags, SINGLE_DEPTH_NESTING);
415
416 switch (qca->tx_ibs_state) {
417 case HCI_IBS_TX_WAKING:
418 /* No WAKE_ACK, retransmit WAKE */
a9137188 419 retransmit = true;
0ff252c1
BYTK		 420 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
421 BT_ERR("Failed to acknowledge device wake up");
422 break;
423 }
424 qca->ibs_sent_wakes++;
425 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
426 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
427 break;
428
429 case HCI_IBS_TX_ASLEEP:
430 case HCI_IBS_TX_AWAKE:
431 /* Fall through */
432
433 default:
e059a465 434 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
0ff252c1
BYTK		 435 break;
436 }
437
438 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
439
440 if (retransmit)
441 hci_uart_tx_wakeup(hu);
442}
443
444/* Initialize protocol */
445static int qca_open(struct hci_uart *hu)
446{
05ba533c 447 struct qca_serdev *qcadev;
0ff252c1 448 struct qca_data *qca;
fa9ad876 449 int ret;
0ff252c1
BYTK		 450
451 BT_DBG("hu %p qca_open", hu);
452
25a13e38 453 qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL);
0ff252c1
BYTK		 454 if (!qca)
455 return -ENOMEM;
456
457 skb_queue_head_init(&qca->txq);
458 skb_queue_head_init(&qca->tx_wait_q);
459 spin_lock_init(&qca->hci_ibs_lock);
fac9a602 460 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);
0ff252c1
BYTK		 461 if (!qca->workqueue) {
462 BT_ERR("QCA Workqueue not initialized properly");
463 kfree(qca);
464 return -ENOMEM;
465 }
466
467 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
468 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
469 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
470 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
471
472 qca->hu = hu;
473
474 /* Assume we start with both sides asleep -- extra wakes OK */
475 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
476 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
477
478 /* clocks actually on, but we start votes off */
479 qca->tx_vote = false;
480 qca->rx_vote = false;
481 qca->flags = 0;
482
483 qca->ibs_sent_wacks = 0;
484 qca->ibs_sent_slps = 0;
485 qca->ibs_sent_wakes = 0;
486 qca->ibs_recv_wacks = 0;
487 qca->ibs_recv_slps = 0;
488 qca->ibs_recv_wakes = 0;
489 qca->vote_last_jif = jiffies;
490 qca->vote_on_ms = 0;
491 qca->vote_off_ms = 0;
492 qca->votes_on = 0;
493 qca->votes_off = 0;
494 qca->tx_votes_on = 0;
495 qca->tx_votes_off = 0;
496 qca->rx_votes_on = 0;
497 qca->rx_votes_off = 0;
498
499 hu->priv = qca;
500
05ba533c 501 if (hu->serdev) {
05ba533c
TE		 502
503 qcadev = serdev_device_get_drvdata(hu->serdev);
fa9ad876
BG		 504 if (qcadev->btsoc_type != QCA_WCN3990) {
505 gpiod_set_value_cansleep(qcadev->bt_en, 1);
506 } else {
507 hu->init_speed = qcadev->init_speed;
508 hu->oper_speed = qcadev->oper_speed;
509 ret = qca_power_setup(hu, true);
510 if (ret) {
511 destroy_workqueue(qca->workqueue);
512 kfree_skb(qca->rx_skb);
513 hu->priv = NULL;
514 kfree(qca);
515 return ret;
516 }
517 }
05ba533c
TE		 518 }
519
fa9ad876
BG		 520 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
521 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
522
523 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
524 qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS;
525
0ff252c1
BYTK		 526 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
527 qca->tx_idle_delay, qca->wake_retrans);
528
529 return 0;
530}
531
532static void qca_debugfs_init(struct hci_dev *hdev)
533{
534 struct hci_uart *hu = hci_get_drvdata(hdev);
535 struct qca_data *qca = hu->priv;
536 struct dentry *ibs_dir;
537 umode_t mode;
538
539 if (!hdev->debugfs)
540 return;
541
542 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
543
544 /* read only */
545 mode = S_IRUGO;
546 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
547 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
548 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
549 &qca->ibs_sent_slps);
550 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
551 &qca->ibs_sent_wakes);
552 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
553 &qca->ibs_sent_wacks);
554 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
555 &qca->ibs_recv_slps);
556 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
557 &qca->ibs_recv_wakes);
558 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
559 &qca->ibs_recv_wacks);
10be6c0f 560 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
0ff252c1
BYTK		 561 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
562 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
10be6c0f 563 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
0ff252c1
BYTK		 564 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
565 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
566 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
567 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
568 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
569 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
570
571 /* read/write */
572 mode = S_IRUGO | S_IWUSR;
573 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
574 debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
575 &qca->tx_idle_delay);
576}
577
578/* Flush protocol data */
579static int qca_flush(struct hci_uart *hu)
580{
581 struct qca_data *qca = hu->priv;
582
583 BT_DBG("hu %p qca flush", hu);
584
585 skb_queue_purge(&qca->tx_wait_q);
586 skb_queue_purge(&qca->txq);
587
588 return 0;
589}
590
591/* Close protocol */
592static int qca_close(struct hci_uart *hu)
593{
05ba533c 594 struct qca_serdev *qcadev;
0ff252c1
BYTK		 595 struct qca_data *qca = hu->priv;
596
597 BT_DBG("hu %p qca close", hu);
598
599 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
600
601 skb_queue_purge(&qca->tx_wait_q);
602 skb_queue_purge(&qca->txq);
603 del_timer(&qca->tx_idle_timer);
604 del_timer(&qca->wake_retrans_timer);
605 destroy_workqueue(qca->workqueue);
606 qca->hu = NULL;
607
05ba533c 608 if (hu->serdev) {
05ba533c 609 qcadev = serdev_device_get_drvdata(hu->serdev);
fa9ad876 610 if (qcadev->btsoc_type == QCA_WCN3990)
c2d78273 611 qca_power_shutdown(hu);
fa9ad876
BG		 612 else
613 gpiod_set_value_cansleep(qcadev->bt_en, 0);
614
05ba533c
TE		 615 }
616
0ff252c1
BYTK		 617 kfree_skb(qca->rx_skb);
618
619 hu->priv = NULL;
620
621 kfree(qca);
622
623 return 0;
624}
625
626/* Called upon a wake-up-indication from the device.
627 */
628static void device_want_to_wakeup(struct hci_uart *hu)
629{
630 unsigned long flags;
631 struct qca_data *qca = hu->priv;
632
633 BT_DBG("hu %p want to wake up", hu);
634
635 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
636
637 qca->ibs_recv_wakes++;
638
639 switch (qca->rx_ibs_state) {
640 case HCI_IBS_RX_ASLEEP:
641 /* Make sure clock is on - we may have turned clock off since
642 * receiving the wake up indicator awake rx clock.
643 */
644 queue_work(qca->workqueue, &qca->ws_awake_rx);
645 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
646 return;
647
648 case HCI_IBS_RX_AWAKE:
649 /* Always acknowledge device wake up,
650 * sending IBS message doesn't count as TX ON.
651 */
652 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
653 BT_ERR("Failed to acknowledge device wake up");
654 break;
655 }
656 qca->ibs_sent_wacks++;
657 break;
658
659 default:
660 /* Any other state is illegal */
661 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
662 qca->rx_ibs_state);
663 break;
664 }
665
666 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
667
668 /* Actually send the packets */
669 hci_uart_tx_wakeup(hu);
670}
671
672/* Called upon a sleep-indication from the device.
673 */
674static void device_want_to_sleep(struct hci_uart *hu)
675{
676 unsigned long flags;
677 struct qca_data *qca = hu->priv;
678
679 BT_DBG("hu %p want to sleep", hu);
680
681 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
682
683 qca->ibs_recv_slps++;
684
685 switch (qca->rx_ibs_state) {
686 case HCI_IBS_RX_AWAKE:
687 /* Update state */
688 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
689 /* Vote off rx clock under workqueue */
690 queue_work(qca->workqueue, &qca->ws_rx_vote_off);
691 break;
692
693 case HCI_IBS_RX_ASLEEP:
694 /* Fall through */
695
696 default:
697 /* Any other state is illegal */
698 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
699 qca->rx_ibs_state);
700 break;
701 }
702
703 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
704}
705
706/* Called upon wake-up-acknowledgement from the device
707 */
708static void device_woke_up(struct hci_uart *hu)
709{
710 unsigned long flags, idle_delay;
711 struct qca_data *qca = hu->priv;
712 struct sk_buff *skb = NULL;
713
714 BT_DBG("hu %p woke up", hu);
715
716 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
717
718 qca->ibs_recv_wacks++;
719
720 switch (qca->tx_ibs_state) {
721 case HCI_IBS_TX_AWAKE:
722 /* Expect one if we send 2 WAKEs */
723 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
724 qca->tx_ibs_state);
725 break;
726
727 case HCI_IBS_TX_WAKING:
728 /* Send pending packets */
729 while ((skb = skb_dequeue(&qca->tx_wait_q)))
730 skb_queue_tail(&qca->txq, skb);
731
732 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
733 del_timer(&qca->wake_retrans_timer);
734 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
735 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
736 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
737 break;
738
739 case HCI_IBS_TX_ASLEEP:
740 /* Fall through */
741
742 default:
743 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
744 qca->tx_ibs_state);
745 break;
746 }
747
748 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
749
750 /* Actually send the packets */
751 hci_uart_tx_wakeup(hu);
752}
753
754/* Enqueue frame for transmittion (padding, crc, etc) may be called from
755 * two simultaneous tasklets.
756 */
757static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
758{
759 unsigned long flags = 0, idle_delay;
760 struct qca_data *qca = hu->priv;
761
762 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
763 qca->tx_ibs_state);
764
765 /* Prepend skb with frame type */
618e8bc2 766 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
0ff252c1
BYTK		 767
768 /* Don't go to sleep in middle of patch download or
769 * Out-Of-Band(GPIOs control) sleep is selected.
770 */
771 if (!test_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags)) {
772 skb_queue_tail(&qca->txq, skb);
773 return 0;
774 }
775
776 spin_lock_irqsave(&qca->hci_ibs_lock, flags);
777
778 /* Act according to current state */
779 switch (qca->tx_ibs_state) {
780 case HCI_IBS_TX_AWAKE:
781 BT_DBG("Device awake, sending normally");
782 skb_queue_tail(&qca->txq, skb);
783 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
784 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
785 break;
786
787 case HCI_IBS_TX_ASLEEP:
788 BT_DBG("Device asleep, waking up and queueing packet");
789 /* Save packet for later */
790 skb_queue_tail(&qca->tx_wait_q, skb);
791
792 qca->tx_ibs_state = HCI_IBS_TX_WAKING;
793 /* Schedule a work queue to wake up device */
794 queue_work(qca->workqueue, &qca->ws_awake_device);
795 break;
796
797 case HCI_IBS_TX_WAKING:
798 BT_DBG("Device waking up, queueing packet");
799 /* Transient state; just keep packet for later */
800 skb_queue_tail(&qca->tx_wait_q, skb);
801 break;
802
803 default:
804 BT_ERR("Illegal tx state: %d (losing packet)",
805 qca->tx_ibs_state);
806 kfree_skb(skb);
807 break;
808 }
809
810 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
811
812 return 0;
813}
814
815static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
816{
817 struct hci_uart *hu = hci_get_drvdata(hdev);
818
819 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
820
821 device_want_to_sleep(hu);
822
823 kfree_skb(skb);
824 return 0;
825}
826
827static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
828{
829 struct hci_uart *hu = hci_get_drvdata(hdev);
830
831 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
832
833 device_want_to_wakeup(hu);
834
835 kfree_skb(skb);
836 return 0;
837}
838
839static int qca_ibs_wake_ack(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_WAKE_ACK);
844
845 device_woke_up(hu);
846
847 kfree_skb(skb);
848 return 0;
849}
850
851#define QCA_IBS_SLEEP_IND_EVENT \
852 .type = HCI_IBS_SLEEP_IND, \
853 .hlen = 0, \
854 .loff = 0, \
855 .lsize = 0, \
856 .maxlen = HCI_MAX_IBS_SIZE
857
858#define QCA_IBS_WAKE_IND_EVENT \
859 .type = HCI_IBS_WAKE_IND, \
860 .hlen = 0, \
861 .loff = 0, \
862 .lsize = 0, \
863 .maxlen = HCI_MAX_IBS_SIZE
864
865#define QCA_IBS_WAKE_ACK_EVENT \
866 .type = HCI_IBS_WAKE_ACK, \
867 .hlen = 0, \
868 .loff = 0, \
869 .lsize = 0, \
870 .maxlen = HCI_MAX_IBS_SIZE
871
872static const struct h4_recv_pkt qca_recv_pkts[] = {
873 { H4_RECV_ACL, .recv = hci_recv_frame },
874 { H4_RECV_SCO, .recv = hci_recv_frame },
875 { H4_RECV_EVENT, .recv = hci_recv_frame },
876 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind },
877 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack },
878 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
879};
880
881static int qca_recv(struct hci_uart *hu, const void *data, int count)
882{
883 struct qca_data *qca = hu->priv;
884
885 if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
886 return -EUNATCH;
887
888 qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
889 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
890 if (IS_ERR(qca->rx_skb)) {
891 int err = PTR_ERR(qca->rx_skb);
2064ee33 892 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
0ff252c1
BYTK		 893 qca->rx_skb = NULL;
894 return err;
895 }
896
897 return count;
898}
899
900static struct sk_buff *qca_dequeue(struct hci_uart *hu)
901{
902 struct qca_data *qca = hu->priv;
903
904 return skb_dequeue(&qca->txq);
905}
906
907static uint8_t qca_get_baudrate_value(int speed)
908{
ce26d813 909 switch (speed) {
0ff252c1
BYTK		 910 case 9600:
911 return QCA_BAUDRATE_9600;
912 case 19200:
913 return QCA_BAUDRATE_19200;
914 case 38400:
915 return QCA_BAUDRATE_38400;
916 case 57600:
917 return QCA_BAUDRATE_57600;
918 case 115200:
919 return QCA_BAUDRATE_115200;
920 case 230400:
921 return QCA_BAUDRATE_230400;
922 case 460800:
923 return QCA_BAUDRATE_460800;
924 case 500000:
925 return QCA_BAUDRATE_500000;
926 case 921600:
927 return QCA_BAUDRATE_921600;
928 case 1000000:
929 return QCA_BAUDRATE_1000000;
930 case 2000000:
931 return QCA_BAUDRATE_2000000;
932 case 3000000:
933 return QCA_BAUDRATE_3000000;
be93a497
BG		 934 case 3200000:
935 return QCA_BAUDRATE_3200000;
0ff252c1
BYTK		 936 case 3500000:
937 return QCA_BAUDRATE_3500000;
938 default:
939 return QCA_BAUDRATE_115200;
940 }
941}
942
943static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
944{
945 struct hci_uart *hu = hci_get_drvdata(hdev);
946 struct qca_data *qca = hu->priv;
947 struct sk_buff *skb;
fa9ad876 948 struct qca_serdev *qcadev;
0ff252c1
BYTK		 949 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
950
be93a497 951 if (baudrate > QCA_BAUDRATE_3200000)
0ff252c1
BYTK		 952 return -EINVAL;
953
954 cmd[4] = baudrate;
955
25a13e38 956 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
0ff252c1 957 if (!skb) {
2064ee33 958 bt_dev_err(hdev, "Failed to allocate baudrate packet");
0ff252c1
BYTK		 959 return -ENOMEM;
960 }
961
fa9ad876
BG		 962 /* Disabling hardware flow control is mandatory while
963 * sending change baudrate request to wcn3990 SoC.
964 */
965 qcadev = serdev_device_get_drvdata(hu->serdev);
966 if (qcadev->btsoc_type == QCA_WCN3990)
967 hci_uart_set_flow_control(hu, true);
968
0ff252c1 969 /* Assign commands to change baudrate and packet type. */
59ae1d12 970 skb_put_data(skb, cmd, sizeof(cmd));
618e8bc2 971 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
0ff252c1
BYTK		 972
973 skb_queue_tail(&qca->txq, skb);
974 hci_uart_tx_wakeup(hu);
975
976 /* wait 300ms to change new baudrate on controller side
977 * controller will come back after they receive this HCI command
978 * then host can communicate with new baudrate to controller
979 */
980 set_current_state(TASK_UNINTERRUPTIBLE);
981 schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
9960521c 982 set_current_state(TASK_RUNNING);
0ff252c1 983
fa9ad876
BG		 984 if (qcadev->btsoc_type == QCA_WCN3990)
985 hci_uart_set_flow_control(hu, false);
986
0ff252c1
BYTK		 987 return 0;
988}
989
05ba533c
TE		 990static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
991{
992 if (hu->serdev)
993 serdev_device_set_baudrate(hu->serdev, speed);
994 else
995 hci_uart_set_baudrate(hu, speed);
996}
997
fa9ad876
BG		 998static int qca_send_power_pulse(struct hci_dev *hdev, u8 cmd)
999{
1000 struct hci_uart *hu = hci_get_drvdata(hdev);
1001 struct qca_data *qca = hu->priv;
1002 struct sk_buff *skb;
1003
1004 /* These power pulses are single byte command which are sent
1005 * at required baudrate to wcn3990. On wcn3990, we have an external
1006 * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1007 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1008 * and also we use the same power inputs to turn on and off for
1009 * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1010 * we send a power on pulse at 115200 bps. This algorithm will help to
1011 * save power. Disabling hardware flow control is mandatory while
1012 * sending power pulses to SoC.
1013 */
1014 bt_dev_dbg(hdev, "sending power pulse %02x to SoC", cmd);
1015
1016 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1017 if (!skb)
1018 return -ENOMEM;
1019
1020 hci_uart_set_flow_control(hu, true);
1021
1022 skb_put_u8(skb, cmd);
1023 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1024
1025 skb_queue_tail(&qca->txq, skb);
1026 hci_uart_tx_wakeup(hu);
1027
1028 /* Wait for 100 uS for SoC to settle down */
1029 usleep_range(100, 200);
1030 hci_uart_set_flow_control(hu, false);
1031
1032 return 0;
1033}
1034
83d9c5e5
BG		 1035static unsigned int qca_get_speed(struct hci_uart *hu,
1036 enum qca_speed_type speed_type)
1037{
1038 unsigned int speed = 0;
1039
1040 if (speed_type == QCA_INIT_SPEED) {
1041 if (hu->init_speed)
1042 speed = hu->init_speed;
1043 else if (hu->proto->init_speed)
1044 speed = hu->proto->init_speed;
1045 } else {
1046 if (hu->oper_speed)
1047 speed = hu->oper_speed;
1048 else if (hu->proto->oper_speed)
1049 speed = hu->proto->oper_speed;
1050 }
1051
1052 return speed;
1053}
1054
1055static int qca_check_speeds(struct hci_uart *hu)
1056{
fa9ad876
BG		 1057 struct qca_serdev *qcadev;
1058
1059 qcadev = serdev_device_get_drvdata(hu->serdev);
1060 if (qcadev->btsoc_type == QCA_WCN3990) {
1061 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
1062 !qca_get_speed(hu, QCA_OPER_SPEED))
1063 return -EINVAL;
1064 } else {
1065 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
1066 !qca_get_speed(hu, QCA_OPER_SPEED))
1067 return -EINVAL;
1068 }
83d9c5e5
BG		 1069
1070 return 0;
1071}
1072
1073static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
1074{
1075 unsigned int speed, qca_baudrate;
1076 int ret;
1077
1078 if (speed_type == QCA_INIT_SPEED) {
1079 speed = qca_get_speed(hu, QCA_INIT_SPEED);
1080 if (speed)
1081 host_set_baudrate(hu, speed);
1082 } else {
1083 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1084 if (!speed)
1085 return 0;
1086
1087 qca_baudrate = qca_get_baudrate_value(speed);
fa9ad876 1088 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
83d9c5e5
BG		 1089 ret = qca_set_baudrate(hu->hdev, qca_baudrate);
1090 if (ret)
1091 return ret;
1092
1093 host_set_baudrate(hu, speed);
1094 }
1095
1096 return 0;
1097}
1098
fa9ad876
BG		 1099static int qca_wcn3990_init(struct hci_uart *hu)
1100{
1101 struct hci_dev *hdev = hu->hdev;
1102 int ret;
1103
1104 /* Forcefully enable wcn3990 to enter in to boot mode. */
1105 host_set_baudrate(hu, 2400);
1106 ret = qca_send_power_pulse(hdev, QCA_WCN3990_POWEROFF_PULSE);
1107 if (ret)
1108 return ret;
1109
1110 qca_set_speed(hu, QCA_INIT_SPEED);
1111 ret = qca_send_power_pulse(hdev, QCA_WCN3990_POWERON_PULSE);
1112 if (ret)
1113 return ret;
1114
1115 /* Wait for 100 ms for SoC to boot */
1116 msleep(100);
1117
1118 /* Now the device is in ready state to communicate with host.
1119 * To sync host with device we need to reopen port.
1120 * Without this, we will have RTS and CTS synchronization
1121 * issues.
1122 */
1123 serdev_device_close(hu->serdev);
1124 ret = serdev_device_open(hu->serdev);
1125 if (ret) {
1126 bt_dev_err(hu->hdev, "failed to open port");
1127 return ret;
1128 }
1129
1130 hci_uart_set_flow_control(hu, false);
1131
1132 return 0;
1133}
1134
0ff252c1
BYTK		 1135static int qca_setup(struct hci_uart *hu)
1136{
1137 struct hci_dev *hdev = hu->hdev;
1138 struct qca_data *qca = hu->priv;
1139 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
fa9ad876 1140 struct qca_serdev *qcadev;
0ff252c1 1141 int ret;
aadebac4 1142 int soc_ver = 0;
0ff252c1 1143
fa9ad876 1144 qcadev = serdev_device_get_drvdata(hu->serdev);
0ff252c1 1145
83d9c5e5
BG		 1146 ret = qca_check_speeds(hu);
1147 if (ret)
1148 return ret;
1149
0ff252c1
BYTK		 1150 /* Patch downloading has to be done without IBS mode */
1151 clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
1152
fa9ad876
BG		 1153 if (qcadev->btsoc_type == QCA_WCN3990) {
1154 bt_dev_info(hdev, "setting up wcn3990");
1155 ret = qca_wcn3990_init(hu);
1156 if (ret)
1157 return ret;
1158
1159 ret = qca_read_soc_version(hdev, &soc_ver);
1160 if (ret)
1161 return ret;
1162 } else {
1163 bt_dev_info(hdev, "ROME setup");
1164 qca_set_speed(hu, QCA_INIT_SPEED);
1165 }
0ff252c1
BYTK		 1166
1167 /* Setup user speed if needed */
83d9c5e5 1168 speed = qca_get_speed(hu, QCA_OPER_SPEED);
0ff252c1 1169 if (speed) {
83d9c5e5
BG		 1170 ret = qca_set_speed(hu, QCA_OPER_SPEED);
1171 if (ret)
0ff252c1 1172 return ret;
83d9c5e5
BG		 1173
1174 qca_baudrate = qca_get_baudrate_value(speed);
0ff252c1
BYTK		 1175 }
1176
fa9ad876
BG		 1177 if (qcadev->btsoc_type != QCA_WCN3990) {
1178 /* Get QCA version information */
1179 ret = qca_read_soc_version(hdev, &soc_ver);
1180 if (ret)
1181 return ret;
1182 }
aadebac4
BG		 1183
1184 bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
0ff252c1 1185 /* Setup patch / NVM configurations */
fa9ad876 1186 ret = qca_uart_setup(hdev, qca_baudrate, qcadev->btsoc_type, soc_ver);
0ff252c1
BYTK		 1187 if (!ret) {
1188 set_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
1189 qca_debugfs_init(hdev);
ba8f3597
LP		 1190 } else if (ret == -ENOENT) {
1191 /* No patch/nvm-config found, run with original fw/config */
1192 ret = 0;
7dc5fe08
AP		 1193 } else if (ret == -EAGAIN) {
1194 /*
1195 * Userspace firmware loader will return -EAGAIN in case no
1196 * patch/nvm-config is found, so run with original fw/config.
1197 */
1198 ret = 0;
0ff252c1
BYTK		 1199 }
1200
1201 /* Setup bdaddr */
1202 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
1203
1204 return ret;
1205}
1206
1207static struct hci_uart_proto qca_proto = {
1208 .id = HCI_UART_QCA,
1209 .name = "QCA",
aee61f7a 1210 .manufacturer = 29,
0ff252c1
BYTK		 1211 .init_speed = 115200,
1212 .oper_speed = 3000000,
1213 .open = qca_open,
1214 .close = qca_close,
1215 .flush = qca_flush,
1216 .setup = qca_setup,
1217 .recv = qca_recv,
1218 .enqueue = qca_enqueue,
1219 .dequeue = qca_dequeue,
1220};
1221
fa9ad876
BG		 1222static const struct qca_vreg_data qca_soc_data = {
1223 .soc_type = QCA_WCN3990,
1224 .vregs = (struct qca_vreg []) {
1225 { "vddio", 1800000, 1900000, 15000 },
1226 { "vddxo", 1800000, 1900000, 80000 },
1227 { "vddrf", 1300000, 1350000, 300000 },
1228 { "vddch0", 3300000, 3400000, 450000 },
1229 },
1230 .num_vregs = 4,
1231};
1232
c2d78273 1233static void qca_power_shutdown(struct hci_uart *hu)
fa9ad876 1234{
c2d78273
BG		 1235 struct serdev_device *serdev = hu->serdev;
1236 unsigned char cmd = QCA_WCN3990_POWEROFF_PULSE;
fa9ad876
BG		 1237
1238 host_set_baudrate(hu, 2400);
c2d78273
BG		 1239 hci_uart_set_flow_control(hu, true);
1240 serdev_device_write_buf(serdev, &cmd, sizeof(cmd));
1241 hci_uart_set_flow_control(hu, false);
fa9ad876
BG		 1242 qca_power_setup(hu, false);
1243}
1244
1245static int qca_enable_regulator(struct qca_vreg vregs,
1246 struct regulator *regulator)
1247{
1248 int ret;
1249
1250 ret = regulator_set_voltage(regulator, vregs.min_uV,
1251 vregs.max_uV);
1252 if (ret)
1253 return ret;
1254
1255 if (vregs.load_uA)
1256 ret = regulator_set_load(regulator,
1257 vregs.load_uA);
1258
1259 if (ret)
1260 return ret;
1261
1262 return regulator_enable(regulator);
1263
1264}
1265
1266static void qca_disable_regulator(struct qca_vreg vregs,
1267 struct regulator *regulator)
1268{
1269 regulator_disable(regulator);
1270 regulator_set_voltage(regulator, 0, vregs.max_uV);
1271 if (vregs.load_uA)
1272 regulator_set_load(regulator, 0);
1273
1274}
1275
1276static int qca_power_setup(struct hci_uart *hu, bool on)
1277{
1278 struct qca_vreg *vregs;
1279 struct regulator_bulk_data *vreg_bulk;
1280 struct qca_serdev *qcadev;
1281 int i, num_vregs, ret = 0;
1282
1283 qcadev = serdev_device_get_drvdata(hu->serdev);
1284 if (!qcadev || !qcadev->bt_power || !qcadev->bt_power->vreg_data ||
1285 !qcadev->bt_power->vreg_bulk)
1286 return -EINVAL;
1287
1288 vregs = qcadev->bt_power->vreg_data->vregs;
1289 vreg_bulk = qcadev->bt_power->vreg_bulk;
1290 num_vregs = qcadev->bt_power->vreg_data->num_vregs;
1291 BT_DBG("on: %d", on);
1292 if (on && !qcadev->bt_power->vregs_on) {
1293 for (i = 0; i < num_vregs; i++) {
1294 ret = qca_enable_regulator(vregs[i],
1295 vreg_bulk[i].consumer);
1296 if (ret)
1297 break;
1298 }
1299
1300 if (ret) {
1301 BT_ERR("failed to enable regulator:%s", vregs[i].name);
1302 /* turn off regulators which are enabled */
1303 for (i = i - 1; i >= 0; i--)
1304 qca_disable_regulator(vregs[i],
1305 vreg_bulk[i].consumer);
1306 } else {
1307 qcadev->bt_power->vregs_on = true;
1308 }
1309 } else if (!on && qcadev->bt_power->vregs_on) {
1310 /* turn off regulator in reverse order */
1311 i = qcadev->bt_power->vreg_data->num_vregs - 1;
1312 for ( ; i >= 0; i--)
1313 qca_disable_regulator(vregs[i], vreg_bulk[i].consumer);
1314
1315 qcadev->bt_power->vregs_on = false;
1316 }
1317
1318 return ret;
1319}
1320
1321static int qca_init_regulators(struct qca_power *qca,
1322 const struct qca_vreg *vregs, size_t num_vregs)
1323{
1324 int i;
1325
1326 qca->vreg_bulk = devm_kzalloc(qca->dev, num_vregs *
1327 sizeof(struct regulator_bulk_data),
1328 GFP_KERNEL);
1329 if (!qca->vreg_bulk)
1330 return -ENOMEM;
1331
1332 for (i = 0; i < num_vregs; i++)
1333 qca->vreg_bulk[i].supply = vregs[i].name;
1334
1335 return devm_regulator_bulk_get(qca->dev, num_vregs, qca->vreg_bulk);
1336}
1337
05ba533c
TE		 1338static int qca_serdev_probe(struct serdev_device *serdev)
1339{
1340 struct qca_serdev *qcadev;
fa9ad876 1341 const struct qca_vreg_data *data;
05ba533c
TE		 1342 int err;
1343
1344 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
1345 if (!qcadev)
1346 return -ENOMEM;
1347
1348 qcadev->serdev_hu.serdev = serdev;
fa9ad876 1349 data = of_device_get_match_data(&serdev->dev);
05ba533c 1350 serdev_device_set_drvdata(serdev, qcadev);
fa9ad876
BG		 1351 if (data && data->soc_type == QCA_WCN3990) {
1352 qcadev->btsoc_type = QCA_WCN3990;
1353 qcadev->bt_power = devm_kzalloc(&serdev->dev,
1354 sizeof(struct qca_power),
1355 GFP_KERNEL);
1356 if (!qcadev->bt_power)
1357 return -ENOMEM;
1358
1359 qcadev->bt_power->dev = &serdev->dev;
1360 qcadev->bt_power->vreg_data = data;
1361 err = qca_init_regulators(qcadev->bt_power, data->vregs,
1362 data->num_vregs);
1363 if (err) {
1364 BT_ERR("Failed to init regulators:%d", err);
1365 goto out;
1366 }
05ba533c 1367
fa9ad876 1368 qcadev->bt_power->vregs_on = false;
05ba533c 1369
fa9ad876
BG		 1370 device_property_read_u32(&serdev->dev, "max-speed",
1371 &qcadev->oper_speed);
1372 if (!qcadev->oper_speed)
1373 BT_DBG("UART will pick default operating speed");
05ba533c 1374
fa9ad876
BG		 1375 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
1376 if (err) {
1377 BT_ERR("wcn3990 serdev registration failed");
1378 goto out;
1379 }
1380 } else {
1381 qcadev->btsoc_type = QCA_ROME;
1382 qcadev->bt_en = devm_gpiod_get(&serdev->dev, "enable",
1383 GPIOD_OUT_LOW);
1384 if (IS_ERR(qcadev->bt_en)) {
1385 dev_err(&serdev->dev, "failed to acquire enable gpio\n");
1386 return PTR_ERR(qcadev->bt_en);
1387 }
05ba533c 1388
fa9ad876
BG		 1389 qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
1390 if (IS_ERR(qcadev->susclk)) {
1391 dev_err(&serdev->dev, "failed to acquire clk\n");
1392 return PTR_ERR(qcadev->susclk);
1393 }
05ba533c 1394
fa9ad876
BG		 1395 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
1396 if (err)
1397 return err;
1398
1399 err = clk_prepare_enable(qcadev->susclk);
1400 if (err)
1401 return err;
1402
1403 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
1404 if (err)
1405 clk_disable_unprepare(qcadev->susclk);
1406 }
1407
1408out: return err;
05ba533c 1409
05ba533c
TE		 1410}
1411
1412static void qca_serdev_remove(struct serdev_device *serdev)
1413{
1414 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
1415
fa9ad876 1416 if (qcadev->btsoc_type == QCA_WCN3990)
c2d78273 1417 qca_power_shutdown(&qcadev->serdev_hu);
fa9ad876
BG		 1418 else
1419 clk_disable_unprepare(qcadev->susclk);
05ba533c 1420
fa9ad876 1421 hci_uart_unregister_device(&qcadev->serdev_hu);
05ba533c
TE		 1422}
1423
1424static const struct of_device_id qca_bluetooth_of_match[] = {
1425 { .compatible = "qcom,qca6174-bt" },
fa9ad876 1426 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data},
05ba533c
TE		 1427 { /* sentinel */ }
1428};
1429MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
1430
1431static struct serdev_device_driver qca_serdev_driver = {
1432 .probe = qca_serdev_probe,
1433 .remove = qca_serdev_remove,
1434 .driver = {
1435 .name = "hci_uart_qca",
1436 .of_match_table = qca_bluetooth_of_match,
1437 },
1438};
1439
0ff252c1
BYTK		 1440int __init qca_init(void)
1441{
05ba533c
TE		 1442 serdev_device_driver_register(&qca_serdev_driver);
1443
0ff252c1
BYTK		 1444 return hci_uart_register_proto(&qca_proto);
1445}
1446
1447int __exit qca_deinit(void)
1448{
05ba533c
TE		 1449 serdev_device_driver_unregister(&qca_serdev_driver);
1450
0ff252c1
BYTK		 1451 return hci_uart_unregister_proto(&qca_proto);
1452}
Linux 6.x block layer and io_uring tree(s)