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