1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Bluetooth Software UART Qualcomm protocol 4 * 5 * HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management 6 * protocol extension to H4. 7 * 8 * Copyright (C) 2007 Texas Instruments, Inc. 9 * Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved. 10 * 11 * Acknowledgements: 12 * This file is based on hci_ll.c, which was... 13 * Written by Ohad Ben-Cohen <ohad@bencohen.org> 14 * which was in turn based on hci_h4.c, which was written 15 * by Maxim Krasnyansky and Marcel Holtmann. 16 */ 17 18#include <linux/kernel.h> 19#include <linux/clk.h> 20#include <linux/completion.h> 21#include <linux/debugfs.h> 22#include <linux/delay.h> 23#include <linux/devcoredump.h> 24#include <linux/device.h> 25#include <linux/gpio/consumer.h> 26#include <linux/mod_devicetable.h> 27#include <linux/module.h> 28#include <linux/of_device.h> 29#include <linux/acpi.h> 30#include <linux/platform_device.h> 31#include <linux/regulator/consumer.h> 32#include <linux/serdev.h> 33#include <linux/mutex.h> 34#include <asm/unaligned.h> 35 36#include <net/bluetooth/bluetooth.h> 37#include <net/bluetooth/hci_core.h> 38 39#include "hci_uart.h" 40#include "btqca.h" 41 42/* HCI_IBS protocol messages */ 43#define HCI_IBS_SLEEP_IND 0xFE 44#define HCI_IBS_WAKE_IND 0xFD 45#define HCI_IBS_WAKE_ACK 0xFC 46#define HCI_MAX_IBS_SIZE 10 47 48#define IBS_WAKE_RETRANS_TIMEOUT_MS 100 49#define IBS_BTSOC_TX_IDLE_TIMEOUT_MS 200 50#define IBS_HOST_TX_IDLE_TIMEOUT_MS 2000 51#define CMD_TRANS_TIMEOUT_MS 100 52#define MEMDUMP_TIMEOUT_MS 8000 53#define IBS_DISABLE_SSR_TIMEOUT_MS \ 54 (MEMDUMP_TIMEOUT_MS + FW_DOWNLOAD_TIMEOUT_MS) 55#define FW_DOWNLOAD_TIMEOUT_MS 3000 56 57/* susclk rate */ 58#define SUSCLK_RATE_32KHZ 32768 59 60/* Controller debug log header */ 61#define QCA_DEBUG_HANDLE 0x2EDC 62 63/* max retry count when init fails */ 64#define MAX_INIT_RETRIES 3 65 66/* Controller dump header */ 67#define QCA_SSR_DUMP_HANDLE 0x0108 68#define QCA_DUMP_PACKET_SIZE 255 69#define QCA_LAST_SEQUENCE_NUM 0xFFFF 70#define QCA_CRASHBYTE_PACKET_LEN 1096 71#define QCA_MEMDUMP_BYTE 0xFB 72 73enum qca_flags { 74 QCA_IBS_DISABLED, 75 QCA_DROP_VENDOR_EVENT, 76 QCA_SUSPENDING, 77 QCA_MEMDUMP_COLLECTION, 78 QCA_HW_ERROR_EVENT, 79 QCA_SSR_TRIGGERED, 80 QCA_BT_OFF, 81 QCA_ROM_FW, 82 QCA_DEBUGFS_CREATED, 83}; 84 85enum qca_capabilities { 86 QCA_CAP_WIDEBAND_SPEECH = BIT(0), 87 QCA_CAP_VALID_LE_STATES = BIT(1), 88}; 89 90/* HCI_IBS transmit side sleep protocol states */ 91enum tx_ibs_states { 92 HCI_IBS_TX_ASLEEP, 93 HCI_IBS_TX_WAKING, 94 HCI_IBS_TX_AWAKE, 95}; 96 97/* HCI_IBS receive side sleep protocol states */ 98enum rx_states { 99 HCI_IBS_RX_ASLEEP, 100 HCI_IBS_RX_AWAKE, 101}; 102 103/* HCI_IBS transmit and receive side clock state vote */ 104enum hci_ibs_clock_state_vote { 105 HCI_IBS_VOTE_STATS_UPDATE, 106 HCI_IBS_TX_VOTE_CLOCK_ON, 107 HCI_IBS_TX_VOTE_CLOCK_OFF, 108 HCI_IBS_RX_VOTE_CLOCK_ON, 109 HCI_IBS_RX_VOTE_CLOCK_OFF, 110}; 111 112/* Controller memory dump states */ 113enum qca_memdump_states { 114 QCA_MEMDUMP_IDLE, 115 QCA_MEMDUMP_COLLECTING, 116 QCA_MEMDUMP_COLLECTED, 117 QCA_MEMDUMP_TIMEOUT, 118}; 119 120struct qca_memdump_data { 121 char *memdump_buf_head; 122 char *memdump_buf_tail; 123 u32 current_seq_no; 124 u32 received_dump; 125 u32 ram_dump_size; 126}; 127 128struct qca_memdump_event_hdr { 129 __u8 evt; 130 __u8 plen; 131 __u16 opcode; 132 __u16 seq_no; 133 __u8 reserved; 134} __packed; 135 136 137struct qca_dump_size { 138 u32 dump_size; 139} __packed; 140 141struct qca_data { 142 struct hci_uart *hu; 143 struct sk_buff *rx_skb; 144 struct sk_buff_head txq; 145 struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */ 146 struct sk_buff_head rx_memdump_q; /* Memdump wait queue */ 147 spinlock_t hci_ibs_lock; /* HCI_IBS state lock */ 148 u8 tx_ibs_state; /* HCI_IBS transmit side power state*/ 149 u8 rx_ibs_state; /* HCI_IBS receive side power state */ 150 bool tx_vote; /* Clock must be on for TX */ 151 bool rx_vote; /* Clock must be on for RX */ 152 struct timer_list tx_idle_timer; 153 u32 tx_idle_delay; 154 struct timer_list wake_retrans_timer; 155 u32 wake_retrans; 156 struct workqueue_struct *workqueue; 157 struct work_struct ws_awake_rx; 158 struct work_struct ws_awake_device; 159 struct work_struct ws_rx_vote_off; 160 struct work_struct ws_tx_vote_off; 161 struct work_struct ctrl_memdump_evt; 162 struct delayed_work ctrl_memdump_timeout; 163 struct qca_memdump_data *qca_memdump; 164 unsigned long flags; 165 struct completion drop_ev_comp; 166 wait_queue_head_t suspend_wait_q; 167 enum qca_memdump_states memdump_state; 168 struct mutex hci_memdump_lock; 169 170 /* For debugging purpose */ 171 u64 ibs_sent_wacks; 172 u64 ibs_sent_slps; 173 u64 ibs_sent_wakes; 174 u64 ibs_recv_wacks; 175 u64 ibs_recv_slps; 176 u64 ibs_recv_wakes; 177 u64 vote_last_jif; 178 u32 vote_on_ms; 179 u32 vote_off_ms; 180 u64 tx_votes_on; 181 u64 rx_votes_on; 182 u64 tx_votes_off; 183 u64 rx_votes_off; 184 u64 votes_on; 185 u64 votes_off; 186}; 187 188enum qca_speed_type { 189 QCA_INIT_SPEED = 1, 190 QCA_OPER_SPEED 191}; 192 193/* 194 * Voltage regulator information required for configuring the 195 * QCA Bluetooth chipset 196 */ 197struct qca_vreg { 198 const char *name; 199 unsigned int load_uA; 200}; 201 202struct qca_device_data { 203 enum qca_btsoc_type soc_type; 204 struct qca_vreg *vregs; 205 size_t num_vregs; 206 uint32_t capabilities; 207}; 208 209/* 210 * Platform data for the QCA Bluetooth power driver. 211 */ 212struct qca_power { 213 struct device *dev; 214 struct regulator_bulk_data *vreg_bulk; 215 int num_vregs; 216 bool vregs_on; 217}; 218 219struct qca_serdev { 220 struct hci_uart serdev_hu; 221 struct gpio_desc *bt_en; 222 struct clk *susclk; 223 enum qca_btsoc_type btsoc_type; 224 struct qca_power *bt_power; 225 u32 init_speed; 226 u32 oper_speed; 227 const char *firmware_name; 228}; 229 230static int qca_regulator_enable(struct qca_serdev *qcadev); 231static void qca_regulator_disable(struct qca_serdev *qcadev); 232static void qca_power_shutdown(struct hci_uart *hu); 233static int qca_power_off(struct hci_dev *hdev); 234static void qca_controller_memdump(struct work_struct *work); 235 236static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu) 237{ 238 enum qca_btsoc_type soc_type; 239 240 if (hu->serdev) { 241 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 242 243 soc_type = qsd->btsoc_type; 244 } else { 245 soc_type = QCA_ROME; 246 } 247 248 return soc_type; 249} 250 251static const char *qca_get_firmware_name(struct hci_uart *hu) 252{ 253 if (hu->serdev) { 254 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 255 256 return qsd->firmware_name; 257 } else { 258 return NULL; 259 } 260} 261 262static void __serial_clock_on(struct tty_struct *tty) 263{ 264 /* TODO: Some chipset requires to enable UART clock on client 265 * side to save power consumption or manual work is required. 266 * Please put your code to control UART clock here if needed 267 */ 268} 269 270static void __serial_clock_off(struct tty_struct *tty) 271{ 272 /* TODO: Some chipset requires to disable UART clock on client 273 * side to save power consumption or manual work is required. 274 * Please put your code to control UART clock off here if needed 275 */ 276} 277 278/* serial_clock_vote needs to be called with the ibs lock held */ 279static void serial_clock_vote(unsigned long vote, struct hci_uart *hu) 280{ 281 struct qca_data *qca = hu->priv; 282 unsigned int diff; 283 284 bool old_vote = (qca->tx_vote | qca->rx_vote); 285 bool new_vote; 286 287 switch (vote) { 288 case HCI_IBS_VOTE_STATS_UPDATE: 289 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 290 291 if (old_vote) 292 qca->vote_off_ms += diff; 293 else 294 qca->vote_on_ms += diff; 295 return; 296 297 case HCI_IBS_TX_VOTE_CLOCK_ON: 298 qca->tx_vote = true; 299 qca->tx_votes_on++; 300 break; 301 302 case HCI_IBS_RX_VOTE_CLOCK_ON: 303 qca->rx_vote = true; 304 qca->rx_votes_on++; 305 break; 306 307 case HCI_IBS_TX_VOTE_CLOCK_OFF: 308 qca->tx_vote = false; 309 qca->tx_votes_off++; 310 break; 311 312 case HCI_IBS_RX_VOTE_CLOCK_OFF: 313 qca->rx_vote = false; 314 qca->rx_votes_off++; 315 break; 316 317 default: 318 BT_ERR("Voting irregularity"); 319 return; 320 } 321 322 new_vote = qca->rx_vote | qca->tx_vote; 323 324 if (new_vote != old_vote) { 325 if (new_vote) 326 __serial_clock_on(hu->tty); 327 else 328 __serial_clock_off(hu->tty); 329 330 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false", 331 vote ? "true" : "false"); 332 333 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 334 335 if (new_vote) { 336 qca->votes_on++; 337 qca->vote_off_ms += diff; 338 } else { 339 qca->votes_off++; 340 qca->vote_on_ms += diff; 341 } 342 qca->vote_last_jif = jiffies; 343 } 344} 345 346/* Builds and sends an HCI_IBS command packet. 347 * These are very simple packets with only 1 cmd byte. 348 */ 349static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu) 350{ 351 int err = 0; 352 struct sk_buff *skb = NULL; 353 struct qca_data *qca = hu->priv; 354 355 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd); 356 357 skb = bt_skb_alloc(1, GFP_ATOMIC); 358 if (!skb) { 359 BT_ERR("Failed to allocate memory for HCI_IBS packet"); 360 return -ENOMEM; 361 } 362 363 /* Assign HCI_IBS type */ 364 skb_put_u8(skb, cmd); 365 366 skb_queue_tail(&qca->txq, skb); 367 368 return err; 369} 370 371static void qca_wq_awake_device(struct work_struct *work) 372{ 373 struct qca_data *qca = container_of(work, struct qca_data, 374 ws_awake_device); 375 struct hci_uart *hu = qca->hu; 376 unsigned long retrans_delay; 377 unsigned long flags; 378 379 BT_DBG("hu %p wq awake device", hu); 380 381 /* Vote for serial clock */ 382 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu); 383 384 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 385 386 /* Send wake indication to device */ 387 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) 388 BT_ERR("Failed to send WAKE to device"); 389 390 qca->ibs_sent_wakes++; 391 392 /* Start retransmit timer */ 393 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 394 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 395 396 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 397 398 /* Actually send the packets */ 399 hci_uart_tx_wakeup(hu); 400} 401 402static void qca_wq_awake_rx(struct work_struct *work) 403{ 404 struct qca_data *qca = container_of(work, struct qca_data, 405 ws_awake_rx); 406 struct hci_uart *hu = qca->hu; 407 unsigned long flags; 408 409 BT_DBG("hu %p wq awake rx", hu); 410 411 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu); 412 413 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 414 qca->rx_ibs_state = HCI_IBS_RX_AWAKE; 415 416 /* Always acknowledge device wake up, 417 * sending IBS message doesn't count as TX ON. 418 */ 419 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) 420 BT_ERR("Failed to acknowledge device wake up"); 421 422 qca->ibs_sent_wacks++; 423 424 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 425 426 /* Actually send the packets */ 427 hci_uart_tx_wakeup(hu); 428} 429 430static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work) 431{ 432 struct qca_data *qca = container_of(work, struct qca_data, 433 ws_rx_vote_off); 434 struct hci_uart *hu = qca->hu; 435 436 BT_DBG("hu %p rx clock vote off", hu); 437 438 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu); 439} 440 441static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work) 442{ 443 struct qca_data *qca = container_of(work, struct qca_data, 444 ws_tx_vote_off); 445 struct hci_uart *hu = qca->hu; 446 447 BT_DBG("hu %p tx clock vote off", hu); 448 449 /* Run HCI tx handling unlocked */ 450 hci_uart_tx_wakeup(hu); 451 452 /* Now that message queued to tty driver, vote for tty clocks off. 453 * It is up to the tty driver to pend the clocks off until tx done. 454 */ 455 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 456} 457 458static void hci_ibs_tx_idle_timeout(struct timer_list *t) 459{ 460 struct qca_data *qca = from_timer(qca, t, tx_idle_timer); 461 struct hci_uart *hu = qca->hu; 462 unsigned long flags; 463 464 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state); 465 466 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 467 flags, SINGLE_DEPTH_NESTING); 468 469 switch (qca->tx_ibs_state) { 470 case HCI_IBS_TX_AWAKE: 471 /* TX_IDLE, go to SLEEP */ 472 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) { 473 BT_ERR("Failed to send SLEEP to device"); 474 break; 475 } 476 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 477 qca->ibs_sent_slps++; 478 queue_work(qca->workqueue, &qca->ws_tx_vote_off); 479 break; 480 481 case HCI_IBS_TX_ASLEEP: 482 case HCI_IBS_TX_WAKING: 483 default: 484 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 485 break; 486 } 487 488 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 489} 490 491static void hci_ibs_wake_retrans_timeout(struct timer_list *t) 492{ 493 struct qca_data *qca = from_timer(qca, t, wake_retrans_timer); 494 struct hci_uart *hu = qca->hu; 495 unsigned long flags, retrans_delay; 496 bool retransmit = false; 497 498 BT_DBG("hu %p wake retransmit timeout in %d state", 499 hu, qca->tx_ibs_state); 500 501 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 502 flags, SINGLE_DEPTH_NESTING); 503 504 /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */ 505 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 506 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 507 return; 508 } 509 510 switch (qca->tx_ibs_state) { 511 case HCI_IBS_TX_WAKING: 512 /* No WAKE_ACK, retransmit WAKE */ 513 retransmit = true; 514 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) { 515 BT_ERR("Failed to acknowledge device wake up"); 516 break; 517 } 518 qca->ibs_sent_wakes++; 519 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 520 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 521 break; 522 523 case HCI_IBS_TX_ASLEEP: 524 case HCI_IBS_TX_AWAKE: 525 default: 526 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 527 break; 528 } 529 530 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 531 532 if (retransmit) 533 hci_uart_tx_wakeup(hu); 534} 535 536 537static void qca_controller_memdump_timeout(struct work_struct *work) 538{ 539 struct qca_data *qca = container_of(work, struct qca_data, 540 ctrl_memdump_timeout.work); 541 struct hci_uart *hu = qca->hu; 542 543 mutex_lock(&qca->hci_memdump_lock); 544 if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) { 545 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 546 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 547 /* Inject hw error event to reset the device 548 * and driver. 549 */ 550 hci_reset_dev(hu->hdev); 551 } 552 } 553 554 mutex_unlock(&qca->hci_memdump_lock); 555} 556 557 558/* Initialize protocol */ 559static int qca_open(struct hci_uart *hu) 560{ 561 struct qca_serdev *qcadev; 562 struct qca_data *qca; 563 564 BT_DBG("hu %p qca_open", hu); 565 566 if (!hci_uart_has_flow_control(hu)) 567 return -EOPNOTSUPP; 568 569 qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL); 570 if (!qca) 571 return -ENOMEM; 572 573 skb_queue_head_init(&qca->txq); 574 skb_queue_head_init(&qca->tx_wait_q); 575 skb_queue_head_init(&qca->rx_memdump_q); 576 spin_lock_init(&qca->hci_ibs_lock); 577 mutex_init(&qca->hci_memdump_lock); 578 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0); 579 if (!qca->workqueue) { 580 BT_ERR("QCA Workqueue not initialized properly"); 581 kfree(qca); 582 return -ENOMEM; 583 } 584 585 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx); 586 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device); 587 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off); 588 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off); 589 INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump); 590 INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout, 591 qca_controller_memdump_timeout); 592 init_waitqueue_head(&qca->suspend_wait_q); 593 594 qca->hu = hu; 595 init_completion(&qca->drop_ev_comp); 596 597 /* Assume we start with both sides asleep -- extra wakes OK */ 598 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 599 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 600 601 qca->vote_last_jif = jiffies; 602 603 hu->priv = qca; 604 605 if (hu->serdev) { 606 qcadev = serdev_device_get_drvdata(hu->serdev); 607 608 if (qca_is_wcn399x(qcadev->btsoc_type)) 609 hu->init_speed = qcadev->init_speed; 610 611 if (qcadev->oper_speed) 612 hu->oper_speed = qcadev->oper_speed; 613 } 614 615 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0); 616 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS; 617 618 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0); 619 qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS; 620 621 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u", 622 qca->tx_idle_delay, qca->wake_retrans); 623 624 return 0; 625} 626 627static void qca_debugfs_init(struct hci_dev *hdev) 628{ 629 struct hci_uart *hu = hci_get_drvdata(hdev); 630 struct qca_data *qca = hu->priv; 631 struct dentry *ibs_dir; 632 umode_t mode; 633 634 if (!hdev->debugfs) 635 return; 636 637 if (test_and_set_bit(QCA_DEBUGFS_CREATED, &qca->flags)) 638 return; 639 640 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs); 641 642 /* read only */ 643 mode = S_IRUGO; 644 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state); 645 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state); 646 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir, 647 &qca->ibs_sent_slps); 648 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir, 649 &qca->ibs_sent_wakes); 650 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir, 651 &qca->ibs_sent_wacks); 652 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir, 653 &qca->ibs_recv_slps); 654 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir, 655 &qca->ibs_recv_wakes); 656 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir, 657 &qca->ibs_recv_wacks); 658 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote); 659 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on); 660 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off); 661 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote); 662 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on); 663 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off); 664 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on); 665 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off); 666 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms); 667 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms); 668 669 /* read/write */ 670 mode = S_IRUGO | S_IWUSR; 671 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans); 672 debugfs_create_u32("tx_idle_delay", mode, ibs_dir, 673 &qca->tx_idle_delay); 674} 675 676/* Flush protocol data */ 677static int qca_flush(struct hci_uart *hu) 678{ 679 struct qca_data *qca = hu->priv; 680 681 BT_DBG("hu %p qca flush", hu); 682 683 skb_queue_purge(&qca->tx_wait_q); 684 skb_queue_purge(&qca->txq); 685 686 return 0; 687} 688 689/* Close protocol */ 690static int qca_close(struct hci_uart *hu) 691{ 692 struct qca_data *qca = hu->priv; 693 694 BT_DBG("hu %p qca close", hu); 695 696 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu); 697 698 skb_queue_purge(&qca->tx_wait_q); 699 skb_queue_purge(&qca->txq); 700 skb_queue_purge(&qca->rx_memdump_q); 701 destroy_workqueue(qca->workqueue); 702 del_timer_sync(&qca->tx_idle_timer); 703 del_timer_sync(&qca->wake_retrans_timer); 704 qca->hu = NULL; 705 706 kfree_skb(qca->rx_skb); 707 708 hu->priv = NULL; 709 710 kfree(qca); 711 712 return 0; 713} 714 715/* Called upon a wake-up-indication from the device. 716 */ 717static void device_want_to_wakeup(struct hci_uart *hu) 718{ 719 unsigned long flags; 720 struct qca_data *qca = hu->priv; 721 722 BT_DBG("hu %p want to wake up", hu); 723 724 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 725 726 qca->ibs_recv_wakes++; 727 728 /* Don't wake the rx up when suspending. */ 729 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 730 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 731 return; 732 } 733 734 switch (qca->rx_ibs_state) { 735 case HCI_IBS_RX_ASLEEP: 736 /* Make sure clock is on - we may have turned clock off since 737 * receiving the wake up indicator awake rx clock. 738 */ 739 queue_work(qca->workqueue, &qca->ws_awake_rx); 740 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 741 return; 742 743 case HCI_IBS_RX_AWAKE: 744 /* Always acknowledge device wake up, 745 * sending IBS message doesn't count as TX ON. 746 */ 747 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) { 748 BT_ERR("Failed to acknowledge device wake up"); 749 break; 750 } 751 qca->ibs_sent_wacks++; 752 break; 753 754 default: 755 /* Any other state is illegal */ 756 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d", 757 qca->rx_ibs_state); 758 break; 759 } 760 761 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 762 763 /* Actually send the packets */ 764 hci_uart_tx_wakeup(hu); 765} 766 767/* Called upon a sleep-indication from the device. 768 */ 769static void device_want_to_sleep(struct hci_uart *hu) 770{ 771 unsigned long flags; 772 struct qca_data *qca = hu->priv; 773 774 BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state); 775 776 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 777 778 qca->ibs_recv_slps++; 779 780 switch (qca->rx_ibs_state) { 781 case HCI_IBS_RX_AWAKE: 782 /* Update state */ 783 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 784 /* Vote off rx clock under workqueue */ 785 queue_work(qca->workqueue, &qca->ws_rx_vote_off); 786 break; 787 788 case HCI_IBS_RX_ASLEEP: 789 break; 790 791 default: 792 /* Any other state is illegal */ 793 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d", 794 qca->rx_ibs_state); 795 break; 796 } 797 798 wake_up_interruptible(&qca->suspend_wait_q); 799 800 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 801} 802 803/* Called upon wake-up-acknowledgement from the device 804 */ 805static void device_woke_up(struct hci_uart *hu) 806{ 807 unsigned long flags, idle_delay; 808 struct qca_data *qca = hu->priv; 809 struct sk_buff *skb = NULL; 810 811 BT_DBG("hu %p woke up", hu); 812 813 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 814 815 qca->ibs_recv_wacks++; 816 817 /* Don't react to the wake-up-acknowledgment when suspending. */ 818 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 819 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 820 return; 821 } 822 823 switch (qca->tx_ibs_state) { 824 case HCI_IBS_TX_AWAKE: 825 /* Expect one if we send 2 WAKEs */ 826 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d", 827 qca->tx_ibs_state); 828 break; 829 830 case HCI_IBS_TX_WAKING: 831 /* Send pending packets */ 832 while ((skb = skb_dequeue(&qca->tx_wait_q))) 833 skb_queue_tail(&qca->txq, skb); 834 835 /* Switch timers and change state to HCI_IBS_TX_AWAKE */ 836 del_timer(&qca->wake_retrans_timer); 837 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 838 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 839 qca->tx_ibs_state = HCI_IBS_TX_AWAKE; 840 break; 841 842 case HCI_IBS_TX_ASLEEP: 843 default: 844 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d", 845 qca->tx_ibs_state); 846 break; 847 } 848 849 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 850 851 /* Actually send the packets */ 852 hci_uart_tx_wakeup(hu); 853} 854 855/* Enqueue frame for transmittion (padding, crc, etc) may be called from 856 * two simultaneous tasklets. 857 */ 858static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb) 859{ 860 unsigned long flags = 0, idle_delay; 861 struct qca_data *qca = hu->priv; 862 863 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb, 864 qca->tx_ibs_state); 865 866 if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 867 /* As SSR is in progress, ignore the packets */ 868 bt_dev_dbg(hu->hdev, "SSR is in progress"); 869 kfree_skb(skb); 870 return 0; 871 } 872 873 /* Prepend skb with frame type */ 874 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 875 876 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 877 878 /* Don't go to sleep in middle of patch download or 879 * Out-Of-Band(GPIOs control) sleep is selected. 880 * Don't wake the device up when suspending. 881 */ 882 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 883 test_bit(QCA_SUSPENDING, &qca->flags)) { 884 skb_queue_tail(&qca->txq, skb); 885 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 886 return 0; 887 } 888 889 /* Act according to current state */ 890 switch (qca->tx_ibs_state) { 891 case HCI_IBS_TX_AWAKE: 892 BT_DBG("Device awake, sending normally"); 893 skb_queue_tail(&qca->txq, skb); 894 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 895 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 896 break; 897 898 case HCI_IBS_TX_ASLEEP: 899 BT_DBG("Device asleep, waking up and queueing packet"); 900 /* Save packet for later */ 901 skb_queue_tail(&qca->tx_wait_q, skb); 902 903 qca->tx_ibs_state = HCI_IBS_TX_WAKING; 904 /* Schedule a work queue to wake up device */ 905 queue_work(qca->workqueue, &qca->ws_awake_device); 906 break; 907 908 case HCI_IBS_TX_WAKING: 909 BT_DBG("Device waking up, queueing packet"); 910 /* Transient state; just keep packet for later */ 911 skb_queue_tail(&qca->tx_wait_q, skb); 912 break; 913 914 default: 915 BT_ERR("Illegal tx state: %d (losing packet)", 916 qca->tx_ibs_state); 917 dev_kfree_skb_irq(skb); 918 break; 919 } 920 921 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 922 923 return 0; 924} 925 926static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb) 927{ 928 struct hci_uart *hu = hci_get_drvdata(hdev); 929 930 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND); 931 932 device_want_to_sleep(hu); 933 934 kfree_skb(skb); 935 return 0; 936} 937 938static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb) 939{ 940 struct hci_uart *hu = hci_get_drvdata(hdev); 941 942 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND); 943 944 device_want_to_wakeup(hu); 945 946 kfree_skb(skb); 947 return 0; 948} 949 950static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb) 951{ 952 struct hci_uart *hu = hci_get_drvdata(hdev); 953 954 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK); 955 956 device_woke_up(hu); 957 958 kfree_skb(skb); 959 return 0; 960} 961 962static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb) 963{ 964 /* We receive debug logs from chip as an ACL packets. 965 * Instead of sending the data to ACL to decode the 966 * received data, we are pushing them to the above layers 967 * as a diagnostic packet. 968 */ 969 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE) 970 return hci_recv_diag(hdev, skb); 971 972 return hci_recv_frame(hdev, skb); 973} 974 975static void qca_controller_memdump(struct work_struct *work) 976{ 977 struct qca_data *qca = container_of(work, struct qca_data, 978 ctrl_memdump_evt); 979 struct hci_uart *hu = qca->hu; 980 struct sk_buff *skb; 981 struct qca_memdump_event_hdr *cmd_hdr; 982 struct qca_memdump_data *qca_memdump = qca->qca_memdump; 983 struct qca_dump_size *dump; 984 char *memdump_buf; 985 char nullBuff[QCA_DUMP_PACKET_SIZE] = { 0 }; 986 u16 seq_no; 987 u32 dump_size; 988 u32 rx_size; 989 enum qca_btsoc_type soc_type = qca_soc_type(hu); 990 991 while ((skb = skb_dequeue(&qca->rx_memdump_q))) { 992 993 mutex_lock(&qca->hci_memdump_lock); 994 /* Skip processing the received packets if timeout detected 995 * or memdump collection completed. 996 */ 997 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 998 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 999 mutex_unlock(&qca->hci_memdump_lock); 1000 return; 1001 } 1002 1003 if (!qca_memdump) { 1004 qca_memdump = kzalloc(sizeof(struct qca_memdump_data), 1005 GFP_ATOMIC); 1006 if (!qca_memdump) { 1007 mutex_unlock(&qca->hci_memdump_lock); 1008 return; 1009 } 1010 1011 qca->qca_memdump = qca_memdump; 1012 } 1013 1014 qca->memdump_state = QCA_MEMDUMP_COLLECTING; 1015 cmd_hdr = (void *) skb->data; 1016 seq_no = __le16_to_cpu(cmd_hdr->seq_no); 1017 skb_pull(skb, sizeof(struct qca_memdump_event_hdr)); 1018 1019 if (!seq_no) { 1020 1021 /* This is the first frame of memdump packet from 1022 * the controller, Disable IBS to recevie dump 1023 * with out any interruption, ideally time required for 1024 * the controller to send the dump is 8 seconds. let us 1025 * start timer to handle this asynchronous activity. 1026 */ 1027 set_bit(QCA_IBS_DISABLED, &qca->flags); 1028 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1029 dump = (void *) skb->data; 1030 dump_size = __le32_to_cpu(dump->dump_size); 1031 if (!(dump_size)) { 1032 bt_dev_err(hu->hdev, "Rx invalid memdump size"); 1033 kfree(qca_memdump); 1034 kfree_skb(skb); 1035 qca->qca_memdump = NULL; 1036 mutex_unlock(&qca->hci_memdump_lock); 1037 return; 1038 } 1039 1040 bt_dev_info(hu->hdev, "QCA collecting dump of size:%u", 1041 dump_size); 1042 queue_delayed_work(qca->workqueue, 1043 &qca->ctrl_memdump_timeout, 1044 msecs_to_jiffies(MEMDUMP_TIMEOUT_MS) 1045 ); 1046 1047 skb_pull(skb, sizeof(dump_size)); 1048 memdump_buf = vmalloc(dump_size); 1049 qca_memdump->ram_dump_size = dump_size; 1050 qca_memdump->memdump_buf_head = memdump_buf; 1051 qca_memdump->memdump_buf_tail = memdump_buf; 1052 } 1053 1054 memdump_buf = qca_memdump->memdump_buf_tail; 1055 1056 /* If sequence no 0 is missed then there is no point in 1057 * accepting the other sequences. 1058 */ 1059 if (!memdump_buf) { 1060 bt_dev_err(hu->hdev, "QCA: Discarding other packets"); 1061 kfree(qca_memdump); 1062 kfree_skb(skb); 1063 qca->qca_memdump = NULL; 1064 mutex_unlock(&qca->hci_memdump_lock); 1065 return; 1066 } 1067 1068 /* There could be chance of missing some packets from 1069 * the controller. In such cases let us store the dummy 1070 * packets in the buffer. 1071 */ 1072 /* For QCA6390, controller does not lost packets but 1073 * sequence number field of packat sometimes has error 1074 * bits, so skip this checking for missing packet. 1075 */ 1076 while ((seq_no > qca_memdump->current_seq_no + 1) && 1077 (soc_type != QCA_QCA6390) && 1078 seq_no != QCA_LAST_SEQUENCE_NUM) { 1079 bt_dev_err(hu->hdev, "QCA controller missed packet:%d", 1080 qca_memdump->current_seq_no); 1081 rx_size = qca_memdump->received_dump; 1082 rx_size += QCA_DUMP_PACKET_SIZE; 1083 if (rx_size > qca_memdump->ram_dump_size) { 1084 bt_dev_err(hu->hdev, 1085 "QCA memdump received %d, no space for missed packet", 1086 qca_memdump->received_dump); 1087 break; 1088 } 1089 memcpy(memdump_buf, nullBuff, QCA_DUMP_PACKET_SIZE); 1090 memdump_buf = memdump_buf + QCA_DUMP_PACKET_SIZE; 1091 qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE; 1092 qca_memdump->current_seq_no++; 1093 } 1094 1095 rx_size = qca_memdump->received_dump + skb->len; 1096 if (rx_size <= qca_memdump->ram_dump_size) { 1097 if ((seq_no != QCA_LAST_SEQUENCE_NUM) && 1098 (seq_no != qca_memdump->current_seq_no)) 1099 bt_dev_err(hu->hdev, 1100 "QCA memdump unexpected packet %d", 1101 seq_no); 1102 bt_dev_dbg(hu->hdev, 1103 "QCA memdump packet %d with length %d", 1104 seq_no, skb->len); 1105 memcpy(memdump_buf, (unsigned char *)skb->data, 1106 skb->len); 1107 memdump_buf = memdump_buf + skb->len; 1108 qca_memdump->memdump_buf_tail = memdump_buf; 1109 qca_memdump->current_seq_no = seq_no + 1; 1110 qca_memdump->received_dump += skb->len; 1111 } else { 1112 bt_dev_err(hu->hdev, 1113 "QCA memdump received %d, no space for packet %d", 1114 qca_memdump->received_dump, seq_no); 1115 } 1116 qca->qca_memdump = qca_memdump; 1117 kfree_skb(skb); 1118 if (seq_no == QCA_LAST_SEQUENCE_NUM) { 1119 bt_dev_info(hu->hdev, 1120 "QCA memdump Done, received %d, total %d", 1121 qca_memdump->received_dump, 1122 qca_memdump->ram_dump_size); 1123 memdump_buf = qca_memdump->memdump_buf_head; 1124 dev_coredumpv(&hu->serdev->dev, memdump_buf, 1125 qca_memdump->received_dump, GFP_KERNEL); 1126 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1127 kfree(qca->qca_memdump); 1128 qca->qca_memdump = NULL; 1129 qca->memdump_state = QCA_MEMDUMP_COLLECTED; 1130 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1131 } 1132 1133 mutex_unlock(&qca->hci_memdump_lock); 1134 } 1135 1136} 1137 1138static int qca_controller_memdump_event(struct hci_dev *hdev, 1139 struct sk_buff *skb) 1140{ 1141 struct hci_uart *hu = hci_get_drvdata(hdev); 1142 struct qca_data *qca = hu->priv; 1143 1144 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1145 skb_queue_tail(&qca->rx_memdump_q, skb); 1146 queue_work(qca->workqueue, &qca->ctrl_memdump_evt); 1147 1148 return 0; 1149} 1150 1151static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb) 1152{ 1153 struct hci_uart *hu = hci_get_drvdata(hdev); 1154 struct qca_data *qca = hu->priv; 1155 1156 if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) { 1157 struct hci_event_hdr *hdr = (void *)skb->data; 1158 1159 /* For the WCN3990 the vendor command for a baudrate change 1160 * isn't sent as synchronous HCI command, because the 1161 * controller sends the corresponding vendor event with the 1162 * new baudrate. The event is received and properly decoded 1163 * after changing the baudrate of the host port. It needs to 1164 * be dropped, otherwise it can be misinterpreted as 1165 * response to a later firmware download command (also a 1166 * vendor command). 1167 */ 1168 1169 if (hdr->evt == HCI_EV_VENDOR) 1170 complete(&qca->drop_ev_comp); 1171 1172 kfree_skb(skb); 1173 1174 return 0; 1175 } 1176 /* We receive chip memory dump as an event packet, With a dedicated 1177 * handler followed by a hardware error event. When this event is 1178 * received we store dump into a file before closing hci. This 1179 * dump will help in triaging the issues. 1180 */ 1181 if ((skb->data[0] == HCI_VENDOR_PKT) && 1182 (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE)) 1183 return qca_controller_memdump_event(hdev, skb); 1184 1185 return hci_recv_frame(hdev, skb); 1186} 1187 1188#define QCA_IBS_SLEEP_IND_EVENT \ 1189 .type = HCI_IBS_SLEEP_IND, \ 1190 .hlen = 0, \ 1191 .loff = 0, \ 1192 .lsize = 0, \ 1193 .maxlen = HCI_MAX_IBS_SIZE 1194 1195#define QCA_IBS_WAKE_IND_EVENT \ 1196 .type = HCI_IBS_WAKE_IND, \ 1197 .hlen = 0, \ 1198 .loff = 0, \ 1199 .lsize = 0, \ 1200 .maxlen = HCI_MAX_IBS_SIZE 1201 1202#define QCA_IBS_WAKE_ACK_EVENT \ 1203 .type = HCI_IBS_WAKE_ACK, \ 1204 .hlen = 0, \ 1205 .loff = 0, \ 1206 .lsize = 0, \ 1207 .maxlen = HCI_MAX_IBS_SIZE 1208 1209static const struct h4_recv_pkt qca_recv_pkts[] = { 1210 { H4_RECV_ACL, .recv = qca_recv_acl_data }, 1211 { H4_RECV_SCO, .recv = hci_recv_frame }, 1212 { H4_RECV_EVENT, .recv = qca_recv_event }, 1213 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind }, 1214 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack }, 1215 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind }, 1216}; 1217 1218static int qca_recv(struct hci_uart *hu, const void *data, int count) 1219{ 1220 struct qca_data *qca = hu->priv; 1221 1222 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 1223 return -EUNATCH; 1224 1225 qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count, 1226 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts)); 1227 if (IS_ERR(qca->rx_skb)) { 1228 int err = PTR_ERR(qca->rx_skb); 1229 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 1230 qca->rx_skb = NULL; 1231 return err; 1232 } 1233 1234 return count; 1235} 1236 1237static struct sk_buff *qca_dequeue(struct hci_uart *hu) 1238{ 1239 struct qca_data *qca = hu->priv; 1240 1241 return skb_dequeue(&qca->txq); 1242} 1243 1244static uint8_t qca_get_baudrate_value(int speed) 1245{ 1246 switch (speed) { 1247 case 9600: 1248 return QCA_BAUDRATE_9600; 1249 case 19200: 1250 return QCA_BAUDRATE_19200; 1251 case 38400: 1252 return QCA_BAUDRATE_38400; 1253 case 57600: 1254 return QCA_BAUDRATE_57600; 1255 case 115200: 1256 return QCA_BAUDRATE_115200; 1257 case 230400: 1258 return QCA_BAUDRATE_230400; 1259 case 460800: 1260 return QCA_BAUDRATE_460800; 1261 case 500000: 1262 return QCA_BAUDRATE_500000; 1263 case 921600: 1264 return QCA_BAUDRATE_921600; 1265 case 1000000: 1266 return QCA_BAUDRATE_1000000; 1267 case 2000000: 1268 return QCA_BAUDRATE_2000000; 1269 case 3000000: 1270 return QCA_BAUDRATE_3000000; 1271 case 3200000: 1272 return QCA_BAUDRATE_3200000; 1273 case 3500000: 1274 return QCA_BAUDRATE_3500000; 1275 default: 1276 return QCA_BAUDRATE_115200; 1277 } 1278} 1279 1280static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate) 1281{ 1282 struct hci_uart *hu = hci_get_drvdata(hdev); 1283 struct qca_data *qca = hu->priv; 1284 struct sk_buff *skb; 1285 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 }; 1286 1287 if (baudrate > QCA_BAUDRATE_3200000) 1288 return -EINVAL; 1289 1290 cmd[4] = baudrate; 1291 1292 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL); 1293 if (!skb) { 1294 bt_dev_err(hdev, "Failed to allocate baudrate packet"); 1295 return -ENOMEM; 1296 } 1297 1298 /* Assign commands to change baudrate and packet type. */ 1299 skb_put_data(skb, cmd, sizeof(cmd)); 1300 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1301 1302 skb_queue_tail(&qca->txq, skb); 1303 hci_uart_tx_wakeup(hu); 1304 1305 /* Wait for the baudrate change request to be sent */ 1306 1307 while (!skb_queue_empty(&qca->txq)) 1308 usleep_range(100, 200); 1309 1310 if (hu->serdev) 1311 serdev_device_wait_until_sent(hu->serdev, 1312 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); 1313 1314 /* Give the controller time to process the request */ 1315 if (qca_is_wcn399x(qca_soc_type(hu))) 1316 msleep(10); 1317 else 1318 msleep(300); 1319 1320 return 0; 1321} 1322 1323static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 1324{ 1325 if (hu->serdev) 1326 serdev_device_set_baudrate(hu->serdev, speed); 1327 else 1328 hci_uart_set_baudrate(hu, speed); 1329} 1330 1331static int qca_send_power_pulse(struct hci_uart *hu, bool on) 1332{ 1333 int ret; 1334 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); 1335 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE; 1336 1337 /* These power pulses are single byte command which are sent 1338 * at required baudrate to wcn3990. On wcn3990, we have an external 1339 * circuit at Tx pin which decodes the pulse sent at specific baudrate. 1340 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT 1341 * and also we use the same power inputs to turn on and off for 1342 * Wi-Fi/BT. Powering up the power sources will not enable BT, until 1343 * we send a power on pulse at 115200 bps. This algorithm will help to 1344 * save power. Disabling hardware flow control is mandatory while 1345 * sending power pulses to SoC. 1346 */ 1347 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd); 1348 1349 serdev_device_write_flush(hu->serdev); 1350 hci_uart_set_flow_control(hu, true); 1351 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 1352 if (ret < 0) { 1353 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd); 1354 return ret; 1355 } 1356 1357 serdev_device_wait_until_sent(hu->serdev, timeout); 1358 hci_uart_set_flow_control(hu, false); 1359 1360 /* Give to controller time to boot/shutdown */ 1361 if (on) 1362 msleep(100); 1363 else 1364 msleep(10); 1365 1366 return 0; 1367} 1368 1369static unsigned int qca_get_speed(struct hci_uart *hu, 1370 enum qca_speed_type speed_type) 1371{ 1372 unsigned int speed = 0; 1373 1374 if (speed_type == QCA_INIT_SPEED) { 1375 if (hu->init_speed) 1376 speed = hu->init_speed; 1377 else if (hu->proto->init_speed) 1378 speed = hu->proto->init_speed; 1379 } else { 1380 if (hu->oper_speed) 1381 speed = hu->oper_speed; 1382 else if (hu->proto->oper_speed) 1383 speed = hu->proto->oper_speed; 1384 } 1385 1386 return speed; 1387} 1388 1389static int qca_check_speeds(struct hci_uart *hu) 1390{ 1391 if (qca_is_wcn399x(qca_soc_type(hu))) { 1392 if (!qca_get_speed(hu, QCA_INIT_SPEED) && 1393 !qca_get_speed(hu, QCA_OPER_SPEED)) 1394 return -EINVAL; 1395 } else { 1396 if (!qca_get_speed(hu, QCA_INIT_SPEED) || 1397 !qca_get_speed(hu, QCA_OPER_SPEED)) 1398 return -EINVAL; 1399 } 1400 1401 return 0; 1402} 1403 1404static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type) 1405{ 1406 unsigned int speed, qca_baudrate; 1407 struct qca_data *qca = hu->priv; 1408 int ret = 0; 1409 1410 if (speed_type == QCA_INIT_SPEED) { 1411 speed = qca_get_speed(hu, QCA_INIT_SPEED); 1412 if (speed) 1413 host_set_baudrate(hu, speed); 1414 } else { 1415 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1416 1417 speed = qca_get_speed(hu, QCA_OPER_SPEED); 1418 if (!speed) 1419 return 0; 1420 1421 /* Disable flow control for wcn3990 to deassert RTS while 1422 * changing the baudrate of chip and host. 1423 */ 1424 if (qca_is_wcn399x(soc_type)) 1425 hci_uart_set_flow_control(hu, true); 1426 1427 if (soc_type == QCA_WCN3990) { 1428 reinit_completion(&qca->drop_ev_comp); 1429 set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1430 } 1431 1432 qca_baudrate = qca_get_baudrate_value(speed); 1433 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed); 1434 ret = qca_set_baudrate(hu->hdev, qca_baudrate); 1435 if (ret) 1436 goto error; 1437 1438 host_set_baudrate(hu, speed); 1439 1440error: 1441 if (qca_is_wcn399x(soc_type)) 1442 hci_uart_set_flow_control(hu, false); 1443 1444 if (soc_type == QCA_WCN3990) { 1445 /* Wait for the controller to send the vendor event 1446 * for the baudrate change command. 1447 */ 1448 if (!wait_for_completion_timeout(&qca->drop_ev_comp, 1449 msecs_to_jiffies(100))) { 1450 bt_dev_err(hu->hdev, 1451 "Failed to change controller baudrate\n"); 1452 ret = -ETIMEDOUT; 1453 } 1454 1455 clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1456 } 1457 } 1458 1459 return ret; 1460} 1461 1462static int qca_send_crashbuffer(struct hci_uart *hu) 1463{ 1464 struct qca_data *qca = hu->priv; 1465 struct sk_buff *skb; 1466 1467 skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL); 1468 if (!skb) { 1469 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet"); 1470 return -ENOMEM; 1471 } 1472 1473 /* We forcefully crash the controller, by sending 0xfb byte for 1474 * 1024 times. We also might have chance of losing data, To be 1475 * on safer side we send 1096 bytes to the SoC. 1476 */ 1477 memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE, 1478 QCA_CRASHBYTE_PACKET_LEN); 1479 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1480 bt_dev_info(hu->hdev, "crash the soc to collect controller dump"); 1481 skb_queue_tail(&qca->txq, skb); 1482 hci_uart_tx_wakeup(hu); 1483 1484 return 0; 1485} 1486 1487static void qca_wait_for_dump_collection(struct hci_dev *hdev) 1488{ 1489 struct hci_uart *hu = hci_get_drvdata(hdev); 1490 struct qca_data *qca = hu->priv; 1491 1492 wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION, 1493 TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS); 1494 1495 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1496} 1497 1498static void qca_hw_error(struct hci_dev *hdev, u8 code) 1499{ 1500 struct hci_uart *hu = hci_get_drvdata(hdev); 1501 struct qca_data *qca = hu->priv; 1502 1503 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1504 set_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1505 bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state); 1506 1507 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1508 /* If hardware error event received for other than QCA 1509 * soc memory dump event, then we need to crash the SOC 1510 * and wait here for 8 seconds to get the dump packets. 1511 * This will block main thread to be on hold until we 1512 * collect dump. 1513 */ 1514 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1515 qca_send_crashbuffer(hu); 1516 qca_wait_for_dump_collection(hdev); 1517 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1518 /* Let us wait here until memory dump collected or 1519 * memory dump timer expired. 1520 */ 1521 bt_dev_info(hdev, "waiting for dump to complete"); 1522 qca_wait_for_dump_collection(hdev); 1523 } 1524 1525 mutex_lock(&qca->hci_memdump_lock); 1526 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1527 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout"); 1528 if (qca->qca_memdump) { 1529 vfree(qca->qca_memdump->memdump_buf_head); 1530 kfree(qca->qca_memdump); 1531 qca->qca_memdump = NULL; 1532 } 1533 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1534 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1535 } 1536 mutex_unlock(&qca->hci_memdump_lock); 1537 1538 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 1539 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 1540 cancel_work_sync(&qca->ctrl_memdump_evt); 1541 skb_queue_purge(&qca->rx_memdump_q); 1542 } 1543 1544 clear_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1545} 1546 1547static void qca_cmd_timeout(struct hci_dev *hdev) 1548{ 1549 struct hci_uart *hu = hci_get_drvdata(hdev); 1550 struct qca_data *qca = hu->priv; 1551 1552 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1553 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1554 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1555 qca_send_crashbuffer(hu); 1556 qca_wait_for_dump_collection(hdev); 1557 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1558 /* Let us wait here until memory dump collected or 1559 * memory dump timer expired. 1560 */ 1561 bt_dev_info(hdev, "waiting for dump to complete"); 1562 qca_wait_for_dump_collection(hdev); 1563 } 1564 1565 mutex_lock(&qca->hci_memdump_lock); 1566 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1567 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1568 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 1569 /* Inject hw error event to reset the device 1570 * and driver. 1571 */ 1572 hci_reset_dev(hu->hdev); 1573 } 1574 } 1575 mutex_unlock(&qca->hci_memdump_lock); 1576} 1577 1578static int qca_wcn3990_init(struct hci_uart *hu) 1579{ 1580 struct qca_serdev *qcadev; 1581 int ret; 1582 1583 /* Check for vregs status, may be hci down has turned 1584 * off the voltage regulator. 1585 */ 1586 qcadev = serdev_device_get_drvdata(hu->serdev); 1587 if (!qcadev->bt_power->vregs_on) { 1588 serdev_device_close(hu->serdev); 1589 ret = qca_regulator_enable(qcadev); 1590 if (ret) 1591 return ret; 1592 1593 ret = serdev_device_open(hu->serdev); 1594 if (ret) { 1595 bt_dev_err(hu->hdev, "failed to open port"); 1596 return ret; 1597 } 1598 } 1599 1600 /* Forcefully enable wcn3990 to enter in to boot mode. */ 1601 host_set_baudrate(hu, 2400); 1602 ret = qca_send_power_pulse(hu, false); 1603 if (ret) 1604 return ret; 1605 1606 qca_set_speed(hu, QCA_INIT_SPEED); 1607 ret = qca_send_power_pulse(hu, true); 1608 if (ret) 1609 return ret; 1610 1611 /* Now the device is in ready state to communicate with host. 1612 * To sync host with device we need to reopen port. 1613 * Without this, we will have RTS and CTS synchronization 1614 * issues. 1615 */ 1616 serdev_device_close(hu->serdev); 1617 ret = serdev_device_open(hu->serdev); 1618 if (ret) { 1619 bt_dev_err(hu->hdev, "failed to open port"); 1620 return ret; 1621 } 1622 1623 hci_uart_set_flow_control(hu, false); 1624 1625 return 0; 1626} 1627 1628static int qca_power_on(struct hci_dev *hdev) 1629{ 1630 struct hci_uart *hu = hci_get_drvdata(hdev); 1631 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1632 struct qca_serdev *qcadev; 1633 struct qca_data *qca = hu->priv; 1634 int ret = 0; 1635 1636 /* Non-serdev device usually is powered by external power 1637 * and don't need additional action in driver for power on 1638 */ 1639 if (!hu->serdev) 1640 return 0; 1641 1642 if (qca_is_wcn399x(soc_type)) { 1643 ret = qca_wcn3990_init(hu); 1644 } else { 1645 qcadev = serdev_device_get_drvdata(hu->serdev); 1646 if (qcadev->bt_en) { 1647 gpiod_set_value_cansleep(qcadev->bt_en, 1); 1648 /* Controller needs time to bootup. */ 1649 msleep(150); 1650 } 1651 } 1652 1653 clear_bit(QCA_BT_OFF, &qca->flags); 1654 return ret; 1655} 1656 1657static int qca_setup(struct hci_uart *hu) 1658{ 1659 struct hci_dev *hdev = hu->hdev; 1660 struct qca_data *qca = hu->priv; 1661 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200; 1662 unsigned int retries = 0; 1663 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1664 const char *firmware_name = qca_get_firmware_name(hu); 1665 int ret; 1666 int soc_ver = 0; 1667 1668 ret = qca_check_speeds(hu); 1669 if (ret) 1670 return ret; 1671 1672 clear_bit(QCA_ROM_FW, &qca->flags); 1673 /* Patch downloading has to be done without IBS mode */ 1674 set_bit(QCA_IBS_DISABLED, &qca->flags); 1675 1676 /* Enable controller to do both LE scan and BR/EDR inquiry 1677 * simultaneously. 1678 */ 1679 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); 1680 1681 bt_dev_info(hdev, "setting up %s", 1682 qca_is_wcn399x(soc_type) ? "wcn399x" : "ROME/QCA6390"); 1683 1684 qca->memdump_state = QCA_MEMDUMP_IDLE; 1685 1686retry: 1687 ret = qca_power_on(hdev); 1688 if (ret) 1689 return ret; 1690 1691 clear_bit(QCA_SSR_TRIGGERED, &qca->flags); 1692 1693 if (qca_is_wcn399x(soc_type)) { 1694 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks); 1695 1696 ret = qca_read_soc_version(hdev, &soc_ver, soc_type); 1697 if (ret) 1698 return ret; 1699 } else { 1700 qca_set_speed(hu, QCA_INIT_SPEED); 1701 } 1702 1703 /* Setup user speed if needed */ 1704 speed = qca_get_speed(hu, QCA_OPER_SPEED); 1705 if (speed) { 1706 ret = qca_set_speed(hu, QCA_OPER_SPEED); 1707 if (ret) 1708 return ret; 1709 1710 qca_baudrate = qca_get_baudrate_value(speed); 1711 } 1712 1713 if (!qca_is_wcn399x(soc_type)) { 1714 /* Get QCA version information */ 1715 ret = qca_read_soc_version(hdev, &soc_ver, soc_type); 1716 if (ret) 1717 return ret; 1718 } 1719 1720 bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver); 1721 /* Setup patch / NVM configurations */ 1722 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver, 1723 firmware_name); 1724 if (!ret) { 1725 clear_bit(QCA_IBS_DISABLED, &qca->flags); 1726 qca_debugfs_init(hdev); 1727 hu->hdev->hw_error = qca_hw_error; 1728 hu->hdev->cmd_timeout = qca_cmd_timeout; 1729 } else if (ret == -ENOENT) { 1730 /* No patch/nvm-config found, run with original fw/config */ 1731 set_bit(QCA_ROM_FW, &qca->flags); 1732 ret = 0; 1733 } else if (ret == -EAGAIN) { 1734 /* 1735 * Userspace firmware loader will return -EAGAIN in case no 1736 * patch/nvm-config is found, so run with original fw/config. 1737 */ 1738 set_bit(QCA_ROM_FW, &qca->flags); 1739 ret = 0; 1740 } else { 1741 if (retries < MAX_INIT_RETRIES) { 1742 qca_power_shutdown(hu); 1743 if (hu->serdev) { 1744 serdev_device_close(hu->serdev); 1745 ret = serdev_device_open(hu->serdev); 1746 if (ret) { 1747 bt_dev_err(hdev, "failed to open port"); 1748 return ret; 1749 } 1750 } 1751 retries++; 1752 goto retry; 1753 } 1754 } 1755 1756 /* Setup bdaddr */ 1757 if (soc_type == QCA_ROME) 1758 hu->hdev->set_bdaddr = qca_set_bdaddr_rome; 1759 else 1760 hu->hdev->set_bdaddr = qca_set_bdaddr; 1761 1762 return ret; 1763} 1764 1765static const struct hci_uart_proto qca_proto = { 1766 .id = HCI_UART_QCA, 1767 .name = "QCA", 1768 .manufacturer = 29, 1769 .init_speed = 115200, 1770 .oper_speed = 3000000, 1771 .open = qca_open, 1772 .close = qca_close, 1773 .flush = qca_flush, 1774 .setup = qca_setup, 1775 .recv = qca_recv, 1776 .enqueue = qca_enqueue, 1777 .dequeue = qca_dequeue, 1778}; 1779 1780static const struct qca_device_data qca_soc_data_wcn3990 = { 1781 .soc_type = QCA_WCN3990, 1782 .vregs = (struct qca_vreg []) { 1783 { "vddio", 15000 }, 1784 { "vddxo", 80000 }, 1785 { "vddrf", 300000 }, 1786 { "vddch0", 450000 }, 1787 }, 1788 .num_vregs = 4, 1789}; 1790 1791static const struct qca_device_data qca_soc_data_wcn3991 = { 1792 .soc_type = QCA_WCN3991, 1793 .vregs = (struct qca_vreg []) { 1794 { "vddio", 15000 }, 1795 { "vddxo", 80000 }, 1796 { "vddrf", 300000 }, 1797 { "vddch0", 450000 }, 1798 }, 1799 .num_vregs = 4, 1800 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES, 1801}; 1802 1803static const struct qca_device_data qca_soc_data_wcn3998 = { 1804 .soc_type = QCA_WCN3998, 1805 .vregs = (struct qca_vreg []) { 1806 { "vddio", 10000 }, 1807 { "vddxo", 80000 }, 1808 { "vddrf", 300000 }, 1809 { "vddch0", 450000 }, 1810 }, 1811 .num_vregs = 4, 1812}; 1813 1814static const struct qca_device_data qca_soc_data_qca6390 = { 1815 .soc_type = QCA_QCA6390, 1816 .num_vregs = 0, 1817 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES, 1818}; 1819 1820static void qca_power_shutdown(struct hci_uart *hu) 1821{ 1822 struct qca_serdev *qcadev; 1823 struct qca_data *qca = hu->priv; 1824 unsigned long flags; 1825 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1826 1827 /* From this point we go into power off state. But serial port is 1828 * still open, stop queueing the IBS data and flush all the buffered 1829 * data in skb's. 1830 */ 1831 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 1832 set_bit(QCA_IBS_DISABLED, &qca->flags); 1833 qca_flush(hu); 1834 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 1835 1836 /* Non-serdev device usually is powered by external power 1837 * and don't need additional action in driver for power down 1838 */ 1839 if (!hu->serdev) 1840 return; 1841 1842 qcadev = serdev_device_get_drvdata(hu->serdev); 1843 1844 if (qca_is_wcn399x(soc_type)) { 1845 host_set_baudrate(hu, 2400); 1846 qca_send_power_pulse(hu, false); 1847 qca_regulator_disable(qcadev); 1848 } else if (qcadev->bt_en) { 1849 gpiod_set_value_cansleep(qcadev->bt_en, 0); 1850 } 1851 1852 set_bit(QCA_BT_OFF, &qca->flags); 1853} 1854 1855static int qca_power_off(struct hci_dev *hdev) 1856{ 1857 struct hci_uart *hu = hci_get_drvdata(hdev); 1858 struct qca_data *qca = hu->priv; 1859 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1860 1861 hu->hdev->hw_error = NULL; 1862 hu->hdev->cmd_timeout = NULL; 1863 1864 del_timer_sync(&qca->wake_retrans_timer); 1865 del_timer_sync(&qca->tx_idle_timer); 1866 1867 /* Stop sending shutdown command if soc crashes. */ 1868 if (soc_type != QCA_ROME 1869 && qca->memdump_state == QCA_MEMDUMP_IDLE) { 1870 qca_send_pre_shutdown_cmd(hdev); 1871 usleep_range(8000, 10000); 1872 } 1873 1874 qca_power_shutdown(hu); 1875 return 0; 1876} 1877 1878static int qca_regulator_enable(struct qca_serdev *qcadev) 1879{ 1880 struct qca_power *power = qcadev->bt_power; 1881 int ret; 1882 1883 /* Already enabled */ 1884 if (power->vregs_on) 1885 return 0; 1886 1887 BT_DBG("enabling %d regulators)", power->num_vregs); 1888 1889 ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk); 1890 if (ret) 1891 return ret; 1892 1893 power->vregs_on = true; 1894 1895 ret = clk_prepare_enable(qcadev->susclk); 1896 if (ret) 1897 qca_regulator_disable(qcadev); 1898 1899 return ret; 1900} 1901 1902static void qca_regulator_disable(struct qca_serdev *qcadev) 1903{ 1904 struct qca_power *power; 1905 1906 if (!qcadev) 1907 return; 1908 1909 power = qcadev->bt_power; 1910 1911 /* Already disabled? */ 1912 if (!power->vregs_on) 1913 return; 1914 1915 regulator_bulk_disable(power->num_vregs, power->vreg_bulk); 1916 power->vregs_on = false; 1917 1918 clk_disable_unprepare(qcadev->susclk); 1919} 1920 1921static int qca_init_regulators(struct qca_power *qca, 1922 const struct qca_vreg *vregs, size_t num_vregs) 1923{ 1924 struct regulator_bulk_data *bulk; 1925 int ret; 1926 int i; 1927 1928 bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL); 1929 if (!bulk) 1930 return -ENOMEM; 1931 1932 for (i = 0; i < num_vregs; i++) 1933 bulk[i].supply = vregs[i].name; 1934 1935 ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk); 1936 if (ret < 0) 1937 return ret; 1938 1939 for (i = 0; i < num_vregs; i++) { 1940 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA); 1941 if (ret) 1942 return ret; 1943 } 1944 1945 qca->vreg_bulk = bulk; 1946 qca->num_vregs = num_vregs; 1947 1948 return 0; 1949} 1950 1951static int qca_serdev_probe(struct serdev_device *serdev) 1952{ 1953 struct qca_serdev *qcadev; 1954 struct hci_dev *hdev; 1955 const struct qca_device_data *data; 1956 int err; 1957 bool power_ctrl_enabled = true; 1958 1959 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL); 1960 if (!qcadev) 1961 return -ENOMEM; 1962 1963 qcadev->serdev_hu.serdev = serdev; 1964 data = device_get_match_data(&serdev->dev); 1965 serdev_device_set_drvdata(serdev, qcadev); 1966 device_property_read_string(&serdev->dev, "firmware-name", 1967 &qcadev->firmware_name); 1968 device_property_read_u32(&serdev->dev, "max-speed", 1969 &qcadev->oper_speed); 1970 if (!qcadev->oper_speed) 1971 BT_DBG("UART will pick default operating speed"); 1972 1973 if (data && qca_is_wcn399x(data->soc_type)) { 1974 qcadev->btsoc_type = data->soc_type; 1975 qcadev->bt_power = devm_kzalloc(&serdev->dev, 1976 sizeof(struct qca_power), 1977 GFP_KERNEL); 1978 if (!qcadev->bt_power) 1979 return -ENOMEM; 1980 1981 qcadev->bt_power->dev = &serdev->dev; 1982 err = qca_init_regulators(qcadev->bt_power, data->vregs, 1983 data->num_vregs); 1984 if (err) { 1985 BT_ERR("Failed to init regulators:%d", err); 1986 return err; 1987 } 1988 1989 qcadev->bt_power->vregs_on = false; 1990 1991 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); 1992 if (IS_ERR(qcadev->susclk)) { 1993 dev_err(&serdev->dev, "failed to acquire clk\n"); 1994 return PTR_ERR(qcadev->susclk); 1995 } 1996 1997 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); 1998 if (err) { 1999 BT_ERR("wcn3990 serdev registration failed"); 2000 return err; 2001 } 2002 } else { 2003 if (data) 2004 qcadev->btsoc_type = data->soc_type; 2005 else 2006 qcadev->btsoc_type = QCA_ROME; 2007 2008 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", 2009 GPIOD_OUT_LOW); 2010 if (IS_ERR_OR_NULL(qcadev->bt_en)) { 2011 dev_warn(&serdev->dev, "failed to acquire enable gpio\n"); 2012 power_ctrl_enabled = false; 2013 } 2014 2015 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); 2016 if (IS_ERR(qcadev->susclk)) { 2017 dev_warn(&serdev->dev, "failed to acquire clk\n"); 2018 return PTR_ERR(qcadev->susclk); 2019 } 2020 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ); 2021 if (err) 2022 return err; 2023 2024 err = clk_prepare_enable(qcadev->susclk); 2025 if (err) 2026 return err; 2027 2028 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); 2029 if (err) { 2030 BT_ERR("Rome serdev registration failed"); 2031 clk_disable_unprepare(qcadev->susclk); 2032 return err; 2033 } 2034 } 2035 2036 hdev = qcadev->serdev_hu.hdev; 2037 2038 if (power_ctrl_enabled) { 2039 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); 2040 hdev->shutdown = qca_power_off; 2041 } 2042 2043 if (data) { 2044 /* Wideband speech support must be set per driver since it can't 2045 * be queried via hci. Same with the valid le states quirk. 2046 */ 2047 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH) 2048 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, 2049 &hdev->quirks); 2050 2051 if (data->capabilities & QCA_CAP_VALID_LE_STATES) 2052 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks); 2053 } 2054 2055 return 0; 2056} 2057 2058static void qca_serdev_remove(struct serdev_device *serdev) 2059{ 2060 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2061 struct qca_power *power = qcadev->bt_power; 2062 2063 if (qca_is_wcn399x(qcadev->btsoc_type) && power->vregs_on) 2064 qca_power_shutdown(&qcadev->serdev_hu); 2065 else if (qcadev->susclk) 2066 clk_disable_unprepare(qcadev->susclk); 2067 2068 hci_uart_unregister_device(&qcadev->serdev_hu); 2069} 2070 2071static void qca_serdev_shutdown(struct device *dev) 2072{ 2073 int ret; 2074 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); 2075 struct serdev_device *serdev = to_serdev_device(dev); 2076 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2077 struct hci_uart *hu = &qcadev->serdev_hu; 2078 struct hci_dev *hdev = hu->hdev; 2079 struct qca_data *qca = hu->priv; 2080 const u8 ibs_wake_cmd[] = { 0xFD }; 2081 const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 }; 2082 2083 if (qcadev->btsoc_type == QCA_QCA6390) { 2084 if (test_bit(QCA_BT_OFF, &qca->flags) || 2085 !test_bit(HCI_RUNNING, &hdev->flags)) 2086 return; 2087 2088 serdev_device_write_flush(serdev); 2089 ret = serdev_device_write_buf(serdev, ibs_wake_cmd, 2090 sizeof(ibs_wake_cmd)); 2091 if (ret < 0) { 2092 BT_ERR("QCA send IBS_WAKE_IND error: %d", ret); 2093 return; 2094 } 2095 serdev_device_wait_until_sent(serdev, timeout); 2096 usleep_range(8000, 10000); 2097 2098 serdev_device_write_flush(serdev); 2099 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd, 2100 sizeof(edl_reset_soc_cmd)); 2101 if (ret < 0) { 2102 BT_ERR("QCA send EDL_RESET_REQ error: %d", ret); 2103 return; 2104 } 2105 serdev_device_wait_until_sent(serdev, timeout); 2106 usleep_range(8000, 10000); 2107 } 2108} 2109 2110static int __maybe_unused qca_suspend(struct device *dev) 2111{ 2112 struct serdev_device *serdev = to_serdev_device(dev); 2113 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2114 struct hci_uart *hu = &qcadev->serdev_hu; 2115 struct qca_data *qca = hu->priv; 2116 unsigned long flags; 2117 bool tx_pending = false; 2118 int ret = 0; 2119 u8 cmd; 2120 u32 wait_timeout = 0; 2121 2122 set_bit(QCA_SUSPENDING, &qca->flags); 2123 2124 /* if BT SoC is running with default firmware then it does not 2125 * support in-band sleep 2126 */ 2127 if (test_bit(QCA_ROM_FW, &qca->flags)) 2128 return 0; 2129 2130 /* During SSR after memory dump collection, controller will be 2131 * powered off and then powered on.If controller is powered off 2132 * during SSR then we should wait until SSR is completed. 2133 */ 2134 if (test_bit(QCA_BT_OFF, &qca->flags) && 2135 !test_bit(QCA_SSR_TRIGGERED, &qca->flags)) 2136 return 0; 2137 2138 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 2139 test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 2140 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ? 2141 IBS_DISABLE_SSR_TIMEOUT_MS : 2142 FW_DOWNLOAD_TIMEOUT_MS; 2143 2144 /* QCA_IBS_DISABLED flag is set to true, During FW download 2145 * and during memory dump collection. It is reset to false, 2146 * After FW download complete. 2147 */ 2148 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED, 2149 TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout)); 2150 2151 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) { 2152 bt_dev_err(hu->hdev, "SSR or FW download time out"); 2153 ret = -ETIMEDOUT; 2154 goto error; 2155 } 2156 } 2157 2158 cancel_work_sync(&qca->ws_awake_device); 2159 cancel_work_sync(&qca->ws_awake_rx); 2160 2161 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 2162 flags, SINGLE_DEPTH_NESTING); 2163 2164 switch (qca->tx_ibs_state) { 2165 case HCI_IBS_TX_WAKING: 2166 del_timer(&qca->wake_retrans_timer); 2167 fallthrough; 2168 case HCI_IBS_TX_AWAKE: 2169 del_timer(&qca->tx_idle_timer); 2170 2171 serdev_device_write_flush(hu->serdev); 2172 cmd = HCI_IBS_SLEEP_IND; 2173 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 2174 2175 if (ret < 0) { 2176 BT_ERR("Failed to send SLEEP to device"); 2177 break; 2178 } 2179 2180 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 2181 qca->ibs_sent_slps++; 2182 tx_pending = true; 2183 break; 2184 2185 case HCI_IBS_TX_ASLEEP: 2186 break; 2187 2188 default: 2189 BT_ERR("Spurious tx state %d", qca->tx_ibs_state); 2190 ret = -EINVAL; 2191 break; 2192 } 2193 2194 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 2195 2196 if (ret < 0) 2197 goto error; 2198 2199 if (tx_pending) { 2200 serdev_device_wait_until_sent(hu->serdev, 2201 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); 2202 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 2203 } 2204 2205 /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going 2206 * to sleep, so that the packet does not wake the system later. 2207 */ 2208 ret = wait_event_interruptible_timeout(qca->suspend_wait_q, 2209 qca->rx_ibs_state == HCI_IBS_RX_ASLEEP, 2210 msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS)); 2211 if (ret == 0) { 2212 ret = -ETIMEDOUT; 2213 goto error; 2214 } 2215 2216 return 0; 2217 2218error: 2219 clear_bit(QCA_SUSPENDING, &qca->flags); 2220 2221 return ret; 2222} 2223 2224static int __maybe_unused qca_resume(struct device *dev) 2225{ 2226 struct serdev_device *serdev = to_serdev_device(dev); 2227 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2228 struct hci_uart *hu = &qcadev->serdev_hu; 2229 struct qca_data *qca = hu->priv; 2230 2231 clear_bit(QCA_SUSPENDING, &qca->flags); 2232 2233 return 0; 2234} 2235 2236static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume); 2237 2238#ifdef CONFIG_OF 2239static const struct of_device_id qca_bluetooth_of_match[] = { 2240 { .compatible = "qcom,qca6174-bt" }, 2241 { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390}, 2242 { .compatible = "qcom,qca9377-bt" }, 2243 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990}, 2244 { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991}, 2245 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998}, 2246 { /* sentinel */ } 2247}; 2248MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match); 2249#endif 2250 2251#ifdef CONFIG_ACPI 2252static const struct acpi_device_id qca_bluetooth_acpi_match[] = { 2253 { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2254 { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2255 { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2256 { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2257 { }, 2258}; 2259MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match); 2260#endif 2261 2262 2263static struct serdev_device_driver qca_serdev_driver = { 2264 .probe = qca_serdev_probe, 2265 .remove = qca_serdev_remove, 2266 .driver = { 2267 .name = "hci_uart_qca", 2268 .of_match_table = of_match_ptr(qca_bluetooth_of_match), 2269 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match), 2270 .shutdown = qca_serdev_shutdown, 2271 .pm = &qca_pm_ops, 2272 }, 2273}; 2274 2275int __init qca_init(void) 2276{ 2277 serdev_device_driver_register(&qca_serdev_driver); 2278 2279 return hci_uart_register_proto(&qca_proto); 2280} 2281 2282int __exit qca_deinit(void) 2283{ 2284 serdev_device_driver_unregister(&qca_serdev_driver); 2285 2286 return hci_uart_unregister_proto(&qca_proto); 2287} 2288