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.h> 29 #include <linux/acpi.h> 30 #include <linux/platform_device.h> 31 #include <linux/pwrseq/consumer.h> 32 #include <linux/regulator/consumer.h> 33 #include <linux/serdev.h> 34 #include <linux/string_choices.h> 35 #include <linux/mutex.h> 36 #include <linux/unaligned.h> 37 38 #include <net/bluetooth/bluetooth.h> 39 #include <net/bluetooth/hci_core.h> 40 41 #include "hci_uart.h" 42 #include "btqca.h" 43 44 /* HCI_IBS protocol messages */ 45 #define HCI_IBS_SLEEP_IND 0xFE 46 #define HCI_IBS_WAKE_IND 0xFD 47 #define HCI_IBS_WAKE_ACK 0xFC 48 #define HCI_MAX_IBS_SIZE 10 49 50 #define IBS_WAKE_RETRANS_TIMEOUT_MS 100 51 #define IBS_BTSOC_TX_IDLE_TIMEOUT_MS 200 52 #define IBS_HOST_TX_IDLE_TIMEOUT_MS 2000 53 #define CMD_TRANS_TIMEOUT_MS 100 54 #define MEMDUMP_TIMEOUT_MS 8000 55 #define IBS_DISABLE_SSR_TIMEOUT_MS \ 56 (MEMDUMP_TIMEOUT_MS + FW_DOWNLOAD_TIMEOUT_MS) 57 #define FW_DOWNLOAD_TIMEOUT_MS 3000 58 59 /* susclk rate */ 60 #define SUSCLK_RATE_32KHZ 32768 61 62 /* Controller debug log header */ 63 #define QCA_DEBUG_HANDLE 0x2EDC 64 65 /* max retry count when init fails */ 66 #define MAX_INIT_RETRIES 3 67 68 /* Controller dump header */ 69 #define QCA_SSR_DUMP_HANDLE 0x0108 70 #define QCA_DUMP_PACKET_SIZE 255 71 #define QCA_LAST_SEQUENCE_NUM 0xFFFF 72 #define QCA_CRASHBYTE_PACKET_LEN 1096 73 #define QCA_MEMDUMP_BYTE 0xFB 74 75 enum qca_flags { 76 QCA_IBS_DISABLED, 77 QCA_DROP_VENDOR_EVENT, 78 QCA_SUSPENDING, 79 QCA_MEMDUMP_COLLECTION, 80 QCA_HW_ERROR_EVENT, 81 QCA_SSR_TRIGGERED, 82 QCA_BT_OFF, 83 QCA_ROM_FW, 84 QCA_DEBUGFS_CREATED, 85 }; 86 87 enum qca_capabilities { 88 QCA_CAP_WIDEBAND_SPEECH = BIT(0), 89 QCA_CAP_VALID_LE_STATES = BIT(1), 90 QCA_CAP_HFP_HW_OFFLOAD = BIT(2), 91 }; 92 93 /* HCI_IBS transmit side sleep protocol states */ 94 enum tx_ibs_states { 95 HCI_IBS_TX_ASLEEP, 96 HCI_IBS_TX_WAKING, 97 HCI_IBS_TX_AWAKE, 98 }; 99 100 /* HCI_IBS receive side sleep protocol states */ 101 enum rx_states { 102 HCI_IBS_RX_ASLEEP, 103 HCI_IBS_RX_AWAKE, 104 }; 105 106 /* HCI_IBS transmit and receive side clock state vote */ 107 enum hci_ibs_clock_state_vote { 108 HCI_IBS_VOTE_STATS_UPDATE, 109 HCI_IBS_TX_VOTE_CLOCK_ON, 110 HCI_IBS_TX_VOTE_CLOCK_OFF, 111 HCI_IBS_RX_VOTE_CLOCK_ON, 112 HCI_IBS_RX_VOTE_CLOCK_OFF, 113 }; 114 115 /* Controller memory dump states */ 116 enum qca_memdump_states { 117 QCA_MEMDUMP_IDLE, 118 QCA_MEMDUMP_COLLECTING, 119 QCA_MEMDUMP_COLLECTED, 120 QCA_MEMDUMP_TIMEOUT, 121 }; 122 123 struct qca_memdump_info { 124 u32 current_seq_no; 125 u32 received_dump; 126 u32 ram_dump_size; 127 }; 128 129 struct qca_memdump_event_hdr { 130 __u8 evt; 131 __u8 plen; 132 __u16 opcode; 133 __le16 seq_no; 134 __u8 reserved; 135 } __packed; 136 137 138 struct qca_dump_size { 139 __le32 dump_size; 140 } __packed; 141 142 struct qca_data { 143 struct hci_uart *hu; 144 struct sk_buff *rx_skb; 145 struct sk_buff_head txq; 146 struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */ 147 struct sk_buff_head rx_memdump_q; /* Memdump wait queue */ 148 spinlock_t hci_ibs_lock; /* HCI_IBS state lock */ 149 u8 tx_ibs_state; /* HCI_IBS transmit side power state*/ 150 u8 rx_ibs_state; /* HCI_IBS receive side power state */ 151 bool tx_vote; /* Clock must be on for TX */ 152 bool rx_vote; /* Clock must be on for RX */ 153 struct timer_list tx_idle_timer; 154 u32 tx_idle_delay; 155 struct timer_list wake_retrans_timer; 156 u32 wake_retrans; 157 struct workqueue_struct *workqueue; 158 struct work_struct ws_awake_rx; 159 struct work_struct ws_awake_device; 160 struct work_struct ws_rx_vote_off; 161 struct work_struct ws_tx_vote_off; 162 struct work_struct ctrl_memdump_evt; 163 struct delayed_work ctrl_memdump_timeout; 164 struct qca_memdump_info *qca_memdump; 165 unsigned long flags; 166 struct completion drop_ev_comp; 167 wait_queue_head_t suspend_wait_q; 168 enum qca_memdump_states memdump_state; 169 struct mutex hci_memdump_lock; 170 171 u16 fw_version; 172 u16 controller_id; 173 /* For debugging purpose */ 174 u64 ibs_sent_wacks; 175 u64 ibs_sent_slps; 176 u64 ibs_sent_wakes; 177 u64 ibs_recv_wacks; 178 u64 ibs_recv_slps; 179 u64 ibs_recv_wakes; 180 u64 vote_last_jif; 181 u32 vote_on_ms; 182 u32 vote_off_ms; 183 u64 tx_votes_on; 184 u64 rx_votes_on; 185 u64 tx_votes_off; 186 u64 rx_votes_off; 187 u64 votes_on; 188 u64 votes_off; 189 }; 190 191 enum qca_speed_type { 192 QCA_INIT_SPEED = 1, 193 QCA_OPER_SPEED 194 }; 195 196 /* 197 * Voltage regulator information required for configuring the 198 * QCA Bluetooth chipset 199 */ 200 struct qca_vreg { 201 const char *name; 202 unsigned int load_uA; 203 }; 204 205 struct qca_device_data { 206 enum qca_btsoc_type soc_type; 207 struct qca_vreg *vregs; 208 size_t num_vregs; 209 uint32_t capabilities; 210 }; 211 212 /* 213 * Platform data for the QCA Bluetooth power driver. 214 */ 215 struct qca_power { 216 struct device *dev; 217 struct regulator_bulk_data *vreg_bulk; 218 int num_vregs; 219 bool vregs_on; 220 struct pwrseq_desc *pwrseq; 221 }; 222 223 struct qca_serdev { 224 struct hci_uart serdev_hu; 225 struct gpio_desc *bt_en; 226 struct gpio_desc *sw_ctrl; 227 struct clk *susclk; 228 enum qca_btsoc_type btsoc_type; 229 struct qca_power *bt_power; 230 u32 init_speed; 231 u32 oper_speed; 232 bool bdaddr_property_broken; 233 bool support_hfp_hw_offload; 234 const char *firmware_name[2]; 235 }; 236 237 static int qca_regulator_enable(struct qca_serdev *qcadev); 238 static void qca_regulator_disable(struct qca_serdev *qcadev); 239 static void qca_power_off(struct hci_uart *hu); 240 static void qca_controller_memdump(struct work_struct *work); 241 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb); 242 243 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu) 244 { 245 enum qca_btsoc_type soc_type; 246 247 if (hu->serdev) { 248 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 249 250 soc_type = qsd->btsoc_type; 251 } else { 252 soc_type = QCA_ROME; 253 } 254 255 return soc_type; 256 } 257 258 static const char *qca_get_firmware_name(struct hci_uart *hu) 259 { 260 if (hu->serdev) { 261 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 262 263 return qsd->firmware_name[0]; 264 } else { 265 return NULL; 266 } 267 } 268 269 static const char *qca_get_rampatch_name(struct hci_uart *hu) 270 { 271 if (hu->serdev) { 272 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 273 274 return qsd->firmware_name[1]; 275 } else { 276 return NULL; 277 } 278 } 279 280 static void __serial_clock_on(struct tty_struct *tty) 281 { 282 /* TODO: Some chipset requires to enable UART clock on client 283 * side to save power consumption or manual work is required. 284 * Please put your code to control UART clock here if needed 285 */ 286 } 287 288 static void __serial_clock_off(struct tty_struct *tty) 289 { 290 /* TODO: Some chipset requires to disable UART clock on client 291 * side to save power consumption or manual work is required. 292 * Please put your code to control UART clock off here if needed 293 */ 294 } 295 296 /* serial_clock_vote needs to be called with the ibs lock held */ 297 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu) 298 { 299 struct qca_data *qca = hu->priv; 300 unsigned int diff; 301 302 bool old_vote = (qca->tx_vote | qca->rx_vote); 303 bool new_vote; 304 305 switch (vote) { 306 case HCI_IBS_VOTE_STATS_UPDATE: 307 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 308 309 if (old_vote) 310 qca->vote_off_ms += diff; 311 else 312 qca->vote_on_ms += diff; 313 return; 314 315 case HCI_IBS_TX_VOTE_CLOCK_ON: 316 qca->tx_vote = true; 317 qca->tx_votes_on++; 318 break; 319 320 case HCI_IBS_RX_VOTE_CLOCK_ON: 321 qca->rx_vote = true; 322 qca->rx_votes_on++; 323 break; 324 325 case HCI_IBS_TX_VOTE_CLOCK_OFF: 326 qca->tx_vote = false; 327 qca->tx_votes_off++; 328 break; 329 330 case HCI_IBS_RX_VOTE_CLOCK_OFF: 331 qca->rx_vote = false; 332 qca->rx_votes_off++; 333 break; 334 335 default: 336 BT_ERR("Voting irregularity"); 337 return; 338 } 339 340 new_vote = qca->rx_vote | qca->tx_vote; 341 342 if (new_vote != old_vote) { 343 if (new_vote) 344 __serial_clock_on(hu->tty); 345 else 346 __serial_clock_off(hu->tty); 347 348 BT_DBG("Vote serial clock %s(%s)", str_true_false(new_vote), 349 str_true_false(vote)); 350 351 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 352 353 if (new_vote) { 354 qca->votes_on++; 355 qca->vote_off_ms += diff; 356 } else { 357 qca->votes_off++; 358 qca->vote_on_ms += diff; 359 } 360 qca->vote_last_jif = jiffies; 361 } 362 } 363 364 /* Builds and sends an HCI_IBS command packet. 365 * These are very simple packets with only 1 cmd byte. 366 */ 367 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu) 368 { 369 int err = 0; 370 struct sk_buff *skb = NULL; 371 struct qca_data *qca = hu->priv; 372 373 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd); 374 375 skb = bt_skb_alloc(1, GFP_ATOMIC); 376 if (!skb) { 377 BT_ERR("Failed to allocate memory for HCI_IBS packet"); 378 return -ENOMEM; 379 } 380 381 /* Assign HCI_IBS type */ 382 skb_put_u8(skb, cmd); 383 384 skb_queue_tail(&qca->txq, skb); 385 386 return err; 387 } 388 389 static void qca_wq_awake_device(struct work_struct *work) 390 { 391 struct qca_data *qca = container_of(work, struct qca_data, 392 ws_awake_device); 393 struct hci_uart *hu = qca->hu; 394 unsigned long retrans_delay; 395 unsigned long flags; 396 397 BT_DBG("hu %p wq awake device", hu); 398 399 /* Vote for serial clock */ 400 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu); 401 402 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 403 404 /* Send wake indication to device */ 405 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) 406 BT_ERR("Failed to send WAKE to device"); 407 408 qca->ibs_sent_wakes++; 409 410 /* Start retransmit timer */ 411 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 412 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 413 414 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 415 416 /* Actually send the packets */ 417 hci_uart_tx_wakeup(hu); 418 } 419 420 static void qca_wq_awake_rx(struct work_struct *work) 421 { 422 struct qca_data *qca = container_of(work, struct qca_data, 423 ws_awake_rx); 424 struct hci_uart *hu = qca->hu; 425 unsigned long flags; 426 427 BT_DBG("hu %p wq awake rx", hu); 428 429 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu); 430 431 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 432 qca->rx_ibs_state = HCI_IBS_RX_AWAKE; 433 434 /* Always acknowledge device wake up, 435 * sending IBS message doesn't count as TX ON. 436 */ 437 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) 438 BT_ERR("Failed to acknowledge device wake up"); 439 440 qca->ibs_sent_wacks++; 441 442 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 443 444 /* Actually send the packets */ 445 hci_uart_tx_wakeup(hu); 446 } 447 448 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work) 449 { 450 struct qca_data *qca = container_of(work, struct qca_data, 451 ws_rx_vote_off); 452 struct hci_uart *hu = qca->hu; 453 454 BT_DBG("hu %p rx clock vote off", hu); 455 456 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu); 457 } 458 459 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work) 460 { 461 struct qca_data *qca = container_of(work, struct qca_data, 462 ws_tx_vote_off); 463 struct hci_uart *hu = qca->hu; 464 465 BT_DBG("hu %p tx clock vote off", hu); 466 467 /* Run HCI tx handling unlocked */ 468 hci_uart_tx_wakeup(hu); 469 470 /* Now that message queued to tty driver, vote for tty clocks off. 471 * It is up to the tty driver to pend the clocks off until tx done. 472 */ 473 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 474 } 475 476 static void hci_ibs_tx_idle_timeout(struct timer_list *t) 477 { 478 struct qca_data *qca = timer_container_of(qca, t, tx_idle_timer); 479 struct hci_uart *hu = qca->hu; 480 unsigned long flags; 481 482 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state); 483 484 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 485 flags, SINGLE_DEPTH_NESTING); 486 487 switch (qca->tx_ibs_state) { 488 case HCI_IBS_TX_AWAKE: 489 /* TX_IDLE, go to SLEEP */ 490 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) { 491 BT_ERR("Failed to send SLEEP to device"); 492 break; 493 } 494 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 495 qca->ibs_sent_slps++; 496 queue_work(qca->workqueue, &qca->ws_tx_vote_off); 497 break; 498 499 case HCI_IBS_TX_ASLEEP: 500 case HCI_IBS_TX_WAKING: 501 default: 502 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 503 break; 504 } 505 506 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 507 } 508 509 static void hci_ibs_wake_retrans_timeout(struct timer_list *t) 510 { 511 struct qca_data *qca = timer_container_of(qca, t, wake_retrans_timer); 512 struct hci_uart *hu = qca->hu; 513 unsigned long flags, retrans_delay; 514 bool retransmit = false; 515 516 BT_DBG("hu %p wake retransmit timeout in %d state", 517 hu, qca->tx_ibs_state); 518 519 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 520 flags, SINGLE_DEPTH_NESTING); 521 522 /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */ 523 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 524 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 525 return; 526 } 527 528 switch (qca->tx_ibs_state) { 529 case HCI_IBS_TX_WAKING: 530 /* No WAKE_ACK, retransmit WAKE */ 531 retransmit = true; 532 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) { 533 BT_ERR("Failed to acknowledge device wake up"); 534 break; 535 } 536 qca->ibs_sent_wakes++; 537 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 538 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 539 break; 540 541 case HCI_IBS_TX_ASLEEP: 542 case HCI_IBS_TX_AWAKE: 543 default: 544 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 545 break; 546 } 547 548 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 549 550 if (retransmit) 551 hci_uart_tx_wakeup(hu); 552 } 553 554 555 static void qca_controller_memdump_timeout(struct work_struct *work) 556 { 557 struct qca_data *qca = container_of(work, struct qca_data, 558 ctrl_memdump_timeout.work); 559 struct hci_uart *hu = qca->hu; 560 561 mutex_lock(&qca->hci_memdump_lock); 562 if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) { 563 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 564 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 565 /* Inject hw error event to reset the device 566 * and driver. 567 */ 568 hci_reset_dev(hu->hdev); 569 } 570 } 571 572 mutex_unlock(&qca->hci_memdump_lock); 573 } 574 575 576 /* Initialize protocol */ 577 static int qca_open(struct hci_uart *hu) 578 { 579 struct qca_serdev *qcadev; 580 struct qca_data *qca; 581 582 BT_DBG("hu %p qca_open", hu); 583 584 if (!hci_uart_has_flow_control(hu)) 585 return -EOPNOTSUPP; 586 587 qca = kzalloc_obj(*qca); 588 if (!qca) 589 return -ENOMEM; 590 591 skb_queue_head_init(&qca->txq); 592 skb_queue_head_init(&qca->tx_wait_q); 593 skb_queue_head_init(&qca->rx_memdump_q); 594 spin_lock_init(&qca->hci_ibs_lock); 595 mutex_init(&qca->hci_memdump_lock); 596 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0); 597 if (!qca->workqueue) { 598 BT_ERR("QCA Workqueue not initialized properly"); 599 kfree(qca); 600 return -ENOMEM; 601 } 602 603 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx); 604 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device); 605 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off); 606 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off); 607 INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump); 608 INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout, 609 qca_controller_memdump_timeout); 610 init_waitqueue_head(&qca->suspend_wait_q); 611 612 qca->hu = hu; 613 init_completion(&qca->drop_ev_comp); 614 615 /* Assume we start with both sides asleep -- extra wakes OK */ 616 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 617 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 618 619 qca->vote_last_jif = jiffies; 620 621 hu->priv = qca; 622 623 if (hu->serdev) { 624 qcadev = serdev_device_get_drvdata(hu->serdev); 625 626 switch (qcadev->btsoc_type) { 627 case QCA_WCN3950: 628 case QCA_WCN3988: 629 case QCA_WCN3990: 630 case QCA_WCN3991: 631 case QCA_WCN3998: 632 case QCA_WCN6750: 633 hu->init_speed = qcadev->init_speed; 634 break; 635 636 default: 637 break; 638 } 639 640 if (qcadev->oper_speed) 641 hu->oper_speed = qcadev->oper_speed; 642 } 643 644 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0); 645 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS; 646 647 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0); 648 qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS; 649 650 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u", 651 qca->tx_idle_delay, qca->wake_retrans); 652 653 return 0; 654 } 655 656 static void qca_debugfs_init(struct hci_dev *hdev) 657 { 658 struct hci_uart *hu = hci_get_drvdata(hdev); 659 struct qca_data *qca = hu->priv; 660 struct dentry *ibs_dir; 661 umode_t mode; 662 663 if (!hdev->debugfs) 664 return; 665 666 if (test_and_set_bit(QCA_DEBUGFS_CREATED, &qca->flags)) 667 return; 668 669 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs); 670 671 /* read only */ 672 mode = 0444; 673 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state); 674 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state); 675 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir, 676 &qca->ibs_sent_slps); 677 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir, 678 &qca->ibs_sent_wakes); 679 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir, 680 &qca->ibs_sent_wacks); 681 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir, 682 &qca->ibs_recv_slps); 683 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir, 684 &qca->ibs_recv_wakes); 685 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir, 686 &qca->ibs_recv_wacks); 687 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote); 688 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on); 689 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off); 690 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote); 691 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on); 692 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off); 693 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on); 694 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off); 695 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms); 696 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms); 697 698 /* read/write */ 699 mode = 0644; 700 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans); 701 debugfs_create_u32("tx_idle_delay", mode, ibs_dir, 702 &qca->tx_idle_delay); 703 } 704 705 /* Flush protocol data */ 706 static int qca_flush(struct hci_uart *hu) 707 { 708 struct qca_data *qca = hu->priv; 709 710 BT_DBG("hu %p qca flush", hu); 711 712 skb_queue_purge(&qca->tx_wait_q); 713 skb_queue_purge(&qca->txq); 714 715 return 0; 716 } 717 718 /* Close protocol */ 719 static int qca_close(struct hci_uart *hu) 720 { 721 struct qca_data *qca = hu->priv; 722 723 BT_DBG("hu %p qca close", hu); 724 725 /* BT core skips qca_hci_shutdown() which calls qca_power_off() on rmmod */ 726 if (!test_bit(QCA_BT_OFF, &qca->flags)) 727 qca_power_off(hu); 728 729 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu); 730 731 skb_queue_purge(&qca->tx_wait_q); 732 skb_queue_purge(&qca->txq); 733 skb_queue_purge(&qca->rx_memdump_q); 734 /* 735 * Shut the timers down so they can't be rearmed when 736 * destroy_workqueue() drains pending work which in turn might try 737 * to arm a timer. After shutdown rearm attempts are silently 738 * ignored by the timer core code. 739 */ 740 timer_shutdown_sync(&qca->tx_idle_timer); 741 timer_shutdown_sync(&qca->wake_retrans_timer); 742 destroy_workqueue(qca->workqueue); 743 qca->hu = NULL; 744 745 kfree_skb(qca->rx_skb); 746 747 hu->priv = NULL; 748 749 kfree(qca); 750 751 return 0; 752 } 753 754 /* Called upon a wake-up-indication from the device. 755 */ 756 static void device_want_to_wakeup(struct hci_uart *hu) 757 { 758 unsigned long flags; 759 struct qca_data *qca = hu->priv; 760 761 BT_DBG("hu %p want to wake up", hu); 762 763 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 764 765 qca->ibs_recv_wakes++; 766 767 /* Don't wake the rx up when suspending. */ 768 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 769 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 770 return; 771 } 772 773 switch (qca->rx_ibs_state) { 774 case HCI_IBS_RX_ASLEEP: 775 /* Make sure clock is on - we may have turned clock off since 776 * receiving the wake up indicator awake rx clock. 777 */ 778 queue_work(qca->workqueue, &qca->ws_awake_rx); 779 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 780 return; 781 782 case HCI_IBS_RX_AWAKE: 783 /* Always acknowledge device wake up, 784 * sending IBS message doesn't count as TX ON. 785 */ 786 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) { 787 BT_ERR("Failed to acknowledge device wake up"); 788 break; 789 } 790 qca->ibs_sent_wacks++; 791 break; 792 793 default: 794 /* Any other state is illegal */ 795 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d", 796 qca->rx_ibs_state); 797 break; 798 } 799 800 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 801 802 /* Actually send the packets */ 803 hci_uart_tx_wakeup(hu); 804 } 805 806 /* Called upon a sleep-indication from the device. 807 */ 808 static void device_want_to_sleep(struct hci_uart *hu) 809 { 810 unsigned long flags; 811 struct qca_data *qca = hu->priv; 812 813 BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state); 814 815 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 816 817 qca->ibs_recv_slps++; 818 819 switch (qca->rx_ibs_state) { 820 case HCI_IBS_RX_AWAKE: 821 /* Update state */ 822 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 823 /* Vote off rx clock under workqueue */ 824 queue_work(qca->workqueue, &qca->ws_rx_vote_off); 825 break; 826 827 case HCI_IBS_RX_ASLEEP: 828 break; 829 830 default: 831 /* Any other state is illegal */ 832 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d", 833 qca->rx_ibs_state); 834 break; 835 } 836 837 wake_up_interruptible(&qca->suspend_wait_q); 838 839 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 840 } 841 842 /* Called upon wake-up-acknowledgement from the device 843 */ 844 static void device_woke_up(struct hci_uart *hu) 845 { 846 unsigned long flags, idle_delay; 847 struct qca_data *qca = hu->priv; 848 struct sk_buff *skb = NULL; 849 850 BT_DBG("hu %p woke up", hu); 851 852 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 853 854 qca->ibs_recv_wacks++; 855 856 /* Don't react to the wake-up-acknowledgment when suspending. */ 857 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 858 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 859 return; 860 } 861 862 switch (qca->tx_ibs_state) { 863 case HCI_IBS_TX_AWAKE: 864 /* Expect one if we send 2 WAKEs */ 865 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d", 866 qca->tx_ibs_state); 867 break; 868 869 case HCI_IBS_TX_WAKING: 870 /* Send pending packets */ 871 while ((skb = skb_dequeue(&qca->tx_wait_q))) 872 skb_queue_tail(&qca->txq, skb); 873 874 /* Switch timers and change state to HCI_IBS_TX_AWAKE */ 875 timer_delete(&qca->wake_retrans_timer); 876 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 877 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 878 qca->tx_ibs_state = HCI_IBS_TX_AWAKE; 879 break; 880 881 case HCI_IBS_TX_ASLEEP: 882 default: 883 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d", 884 qca->tx_ibs_state); 885 break; 886 } 887 888 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 889 890 /* Actually send the packets */ 891 hci_uart_tx_wakeup(hu); 892 } 893 894 /* Enqueue frame for transmission (padding, crc, etc) may be called from 895 * two simultaneous tasklets. 896 */ 897 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb) 898 { 899 unsigned long flags = 0, idle_delay; 900 struct qca_data *qca = hu->priv; 901 902 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb, 903 qca->tx_ibs_state); 904 905 if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 906 /* As SSR is in progress, ignore the packets */ 907 bt_dev_dbg(hu->hdev, "SSR is in progress"); 908 kfree_skb(skb); 909 return 0; 910 } 911 912 /* Prepend skb with frame type */ 913 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 914 915 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 916 917 /* Don't go to sleep in middle of patch download or 918 * Out-Of-Band(GPIOs control) sleep is selected. 919 * Don't wake the device up when suspending. 920 */ 921 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 922 test_bit(QCA_SUSPENDING, &qca->flags)) { 923 skb_queue_tail(&qca->txq, skb); 924 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 925 return 0; 926 } 927 928 /* Act according to current state */ 929 switch (qca->tx_ibs_state) { 930 case HCI_IBS_TX_AWAKE: 931 BT_DBG("Device awake, sending normally"); 932 skb_queue_tail(&qca->txq, skb); 933 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 934 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 935 break; 936 937 case HCI_IBS_TX_ASLEEP: 938 BT_DBG("Device asleep, waking up and queueing packet"); 939 /* Save packet for later */ 940 skb_queue_tail(&qca->tx_wait_q, skb); 941 942 qca->tx_ibs_state = HCI_IBS_TX_WAKING; 943 /* Schedule a work queue to wake up device */ 944 queue_work(qca->workqueue, &qca->ws_awake_device); 945 break; 946 947 case HCI_IBS_TX_WAKING: 948 BT_DBG("Device waking up, queueing packet"); 949 /* Transient state; just keep packet for later */ 950 skb_queue_tail(&qca->tx_wait_q, skb); 951 break; 952 953 default: 954 BT_ERR("Illegal tx state: %d (losing packet)", 955 qca->tx_ibs_state); 956 dev_kfree_skb_irq(skb); 957 break; 958 } 959 960 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 961 962 return 0; 963 } 964 965 static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb) 966 { 967 struct hci_uart *hu = hci_get_drvdata(hdev); 968 969 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND); 970 971 device_want_to_sleep(hu); 972 973 kfree_skb(skb); 974 return 0; 975 } 976 977 static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb) 978 { 979 struct hci_uart *hu = hci_get_drvdata(hdev); 980 981 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND); 982 983 device_want_to_wakeup(hu); 984 985 kfree_skb(skb); 986 return 0; 987 } 988 989 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb) 990 { 991 struct hci_uart *hu = hci_get_drvdata(hdev); 992 993 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK); 994 995 device_woke_up(hu); 996 997 kfree_skb(skb); 998 return 0; 999 } 1000 1001 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb) 1002 { 1003 /* We receive debug logs from chip as an ACL packets. 1004 * Instead of sending the data to ACL to decode the 1005 * received data, we are pushing them to the above layers 1006 * as a diagnostic packet. 1007 */ 1008 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE) 1009 return hci_recv_diag(hdev, skb); 1010 1011 return hci_recv_frame(hdev, skb); 1012 } 1013 1014 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb) 1015 { 1016 struct hci_uart *hu = hci_get_drvdata(hdev); 1017 struct qca_data *qca = hu->priv; 1018 char buf[80]; 1019 1020 snprintf(buf, sizeof(buf), "Controller Name: 0x%x\n", 1021 qca->controller_id); 1022 skb_put_data(skb, buf, strlen(buf)); 1023 1024 snprintf(buf, sizeof(buf), "Firmware Version: 0x%x\n", 1025 qca->fw_version); 1026 skb_put_data(skb, buf, strlen(buf)); 1027 1028 snprintf(buf, sizeof(buf), "Vendor:Qualcomm\n"); 1029 skb_put_data(skb, buf, strlen(buf)); 1030 1031 snprintf(buf, sizeof(buf), "Driver: %s\n", 1032 hu->serdev->dev.driver->name); 1033 skb_put_data(skb, buf, strlen(buf)); 1034 } 1035 1036 static void qca_controller_memdump(struct work_struct *work) 1037 { 1038 struct qca_data *qca = container_of(work, struct qca_data, 1039 ctrl_memdump_evt); 1040 struct hci_uart *hu = qca->hu; 1041 struct sk_buff *skb; 1042 struct qca_memdump_event_hdr *cmd_hdr; 1043 struct qca_memdump_info *qca_memdump = qca->qca_memdump; 1044 struct qca_dump_size *dump; 1045 u16 seq_no; 1046 u32 rx_size; 1047 int ret = 0; 1048 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1049 1050 while ((skb = skb_dequeue(&qca->rx_memdump_q))) { 1051 1052 mutex_lock(&qca->hci_memdump_lock); 1053 /* Skip processing the received packets if timeout detected 1054 * or memdump collection completed. 1055 */ 1056 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 1057 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 1058 mutex_unlock(&qca->hci_memdump_lock); 1059 return; 1060 } 1061 1062 if (!qca_memdump) { 1063 qca_memdump = kzalloc_obj(*qca_memdump, GFP_ATOMIC); 1064 if (!qca_memdump) { 1065 mutex_unlock(&qca->hci_memdump_lock); 1066 return; 1067 } 1068 1069 qca->qca_memdump = qca_memdump; 1070 } 1071 1072 qca->memdump_state = QCA_MEMDUMP_COLLECTING; 1073 cmd_hdr = (void *) skb->data; 1074 seq_no = __le16_to_cpu(cmd_hdr->seq_no); 1075 skb_pull(skb, sizeof(struct qca_memdump_event_hdr)); 1076 1077 if (!seq_no) { 1078 1079 /* This is the first frame of memdump packet from 1080 * the controller, Disable IBS to receive dump 1081 * with out any interruption, ideally time required for 1082 * the controller to send the dump is 8 seconds. let us 1083 * start timer to handle this asynchronous activity. 1084 */ 1085 set_bit(QCA_IBS_DISABLED, &qca->flags); 1086 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1087 dump = (void *) skb->data; 1088 qca_memdump->ram_dump_size = __le32_to_cpu(dump->dump_size); 1089 if (!(qca_memdump->ram_dump_size)) { 1090 bt_dev_err(hu->hdev, "Rx invalid memdump size"); 1091 kfree(qca_memdump); 1092 kfree_skb(skb); 1093 mutex_unlock(&qca->hci_memdump_lock); 1094 return; 1095 } 1096 1097 queue_delayed_work(qca->workqueue, 1098 &qca->ctrl_memdump_timeout, 1099 msecs_to_jiffies(MEMDUMP_TIMEOUT_MS)); 1100 skb_pull(skb, sizeof(qca_memdump->ram_dump_size)); 1101 qca_memdump->current_seq_no = 0; 1102 qca_memdump->received_dump = 0; 1103 ret = hci_devcd_init(hu->hdev, qca_memdump->ram_dump_size); 1104 bt_dev_info(hu->hdev, "hci_devcd_init Return:%d", 1105 ret); 1106 if (ret < 0) { 1107 kfree(qca->qca_memdump); 1108 qca->qca_memdump = NULL; 1109 qca->memdump_state = QCA_MEMDUMP_COLLECTED; 1110 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1111 clear_and_wake_up_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1112 clear_bit(QCA_IBS_DISABLED, &qca->flags); 1113 mutex_unlock(&qca->hci_memdump_lock); 1114 return; 1115 } 1116 1117 bt_dev_info(hu->hdev, "QCA collecting dump of size:%u", 1118 qca_memdump->ram_dump_size); 1119 1120 } 1121 1122 /* If sequence no 0 is missed then there is no point in 1123 * accepting the other sequences. 1124 */ 1125 if (!test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) { 1126 bt_dev_err(hu->hdev, "QCA: Discarding other packets"); 1127 kfree(qca_memdump); 1128 kfree_skb(skb); 1129 mutex_unlock(&qca->hci_memdump_lock); 1130 return; 1131 } 1132 /* There could be chance of missing some packets from 1133 * the controller. In such cases let us store the dummy 1134 * packets in the buffer. 1135 */ 1136 /* For QCA6390, controller does not lost packets but 1137 * sequence number field of packet sometimes has error 1138 * bits, so skip this checking for missing packet. 1139 */ 1140 while ((seq_no > qca_memdump->current_seq_no + 1) && 1141 (soc_type != QCA_QCA6390) && 1142 seq_no != QCA_LAST_SEQUENCE_NUM) { 1143 bt_dev_err(hu->hdev, "QCA controller missed packet:%d", 1144 qca_memdump->current_seq_no); 1145 rx_size = qca_memdump->received_dump; 1146 rx_size += QCA_DUMP_PACKET_SIZE; 1147 if (rx_size > qca_memdump->ram_dump_size) { 1148 bt_dev_err(hu->hdev, 1149 "QCA memdump received %d, no space for missed packet", 1150 qca_memdump->received_dump); 1151 break; 1152 } 1153 hci_devcd_append_pattern(hu->hdev, 0x00, 1154 QCA_DUMP_PACKET_SIZE); 1155 qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE; 1156 qca_memdump->current_seq_no++; 1157 } 1158 1159 rx_size = qca_memdump->received_dump + skb->len; 1160 if (rx_size <= qca_memdump->ram_dump_size) { 1161 if ((seq_no != QCA_LAST_SEQUENCE_NUM) && 1162 (seq_no != qca_memdump->current_seq_no)) { 1163 bt_dev_err(hu->hdev, 1164 "QCA memdump unexpected packet %d", 1165 seq_no); 1166 } 1167 bt_dev_dbg(hu->hdev, 1168 "QCA memdump packet %d with length %d", 1169 seq_no, skb->len); 1170 hci_devcd_append(hu->hdev, skb); 1171 qca_memdump->current_seq_no += 1; 1172 qca_memdump->received_dump = rx_size; 1173 } else { 1174 bt_dev_err(hu->hdev, 1175 "QCA memdump received no space for packet %d", 1176 qca_memdump->current_seq_no); 1177 } 1178 1179 if (seq_no == QCA_LAST_SEQUENCE_NUM) { 1180 bt_dev_info(hu->hdev, 1181 "QCA memdump Done, received %d, total %d", 1182 qca_memdump->received_dump, 1183 qca_memdump->ram_dump_size); 1184 hci_devcd_complete(hu->hdev); 1185 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1186 kfree(qca->qca_memdump); 1187 qca->qca_memdump = NULL; 1188 qca->memdump_state = QCA_MEMDUMP_COLLECTED; 1189 clear_and_wake_up_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1190 } 1191 1192 mutex_unlock(&qca->hci_memdump_lock); 1193 } 1194 1195 } 1196 1197 static int qca_controller_memdump_event(struct hci_dev *hdev, 1198 struct sk_buff *skb) 1199 { 1200 struct hci_uart *hu = hci_get_drvdata(hdev); 1201 struct qca_data *qca = hu->priv; 1202 1203 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1204 skb_queue_tail(&qca->rx_memdump_q, skb); 1205 queue_work(qca->workqueue, &qca->ctrl_memdump_evt); 1206 1207 return 0; 1208 } 1209 1210 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb) 1211 { 1212 struct hci_uart *hu = hci_get_drvdata(hdev); 1213 struct qca_data *qca = hu->priv; 1214 1215 if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) { 1216 struct hci_event_hdr *hdr = (void *)skb->data; 1217 1218 /* For the WCN3990 the vendor command for a baudrate change 1219 * isn't sent as synchronous HCI command, because the 1220 * controller sends the corresponding vendor event with the 1221 * new baudrate. The event is received and properly decoded 1222 * after changing the baudrate of the host port. It needs to 1223 * be dropped, otherwise it can be misinterpreted as 1224 * response to a later firmware download command (also a 1225 * vendor command). 1226 */ 1227 1228 if (hdr->evt == HCI_EV_VENDOR) 1229 complete(&qca->drop_ev_comp); 1230 1231 kfree_skb(skb); 1232 1233 return 0; 1234 } 1235 /* We receive chip memory dump as an event packet, With a dedicated 1236 * handler followed by a hardware error event. When this event is 1237 * received we store dump into a file before closing hci. This 1238 * dump will help in triaging the issues. 1239 */ 1240 if ((skb->data[0] == HCI_VENDOR_PKT) && 1241 (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE)) 1242 return qca_controller_memdump_event(hdev, skb); 1243 1244 return hci_recv_frame(hdev, skb); 1245 } 1246 1247 #define QCA_IBS_SLEEP_IND_EVENT \ 1248 .type = HCI_IBS_SLEEP_IND, \ 1249 .hlen = 0, \ 1250 .loff = 0, \ 1251 .lsize = 0, \ 1252 .maxlen = HCI_MAX_IBS_SIZE 1253 1254 #define QCA_IBS_WAKE_IND_EVENT \ 1255 .type = HCI_IBS_WAKE_IND, \ 1256 .hlen = 0, \ 1257 .loff = 0, \ 1258 .lsize = 0, \ 1259 .maxlen = HCI_MAX_IBS_SIZE 1260 1261 #define QCA_IBS_WAKE_ACK_EVENT \ 1262 .type = HCI_IBS_WAKE_ACK, \ 1263 .hlen = 0, \ 1264 .loff = 0, \ 1265 .lsize = 0, \ 1266 .maxlen = HCI_MAX_IBS_SIZE 1267 1268 static const struct h4_recv_pkt qca_recv_pkts[] = { 1269 { H4_RECV_ACL, .recv = qca_recv_acl_data }, 1270 { H4_RECV_SCO, .recv = hci_recv_frame }, 1271 { H4_RECV_EVENT, .recv = qca_recv_event }, 1272 { H4_RECV_ISO, .recv = hci_recv_frame }, 1273 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind }, 1274 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack }, 1275 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind }, 1276 }; 1277 1278 static int qca_recv(struct hci_uart *hu, const void *data, int count) 1279 { 1280 struct qca_data *qca = hu->priv; 1281 1282 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 1283 return -EUNATCH; 1284 1285 qca->rx_skb = h4_recv_buf(hu, qca->rx_skb, data, count, 1286 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts)); 1287 if (IS_ERR(qca->rx_skb)) { 1288 int err = PTR_ERR(qca->rx_skb); 1289 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 1290 qca->rx_skb = NULL; 1291 return err; 1292 } 1293 1294 return count; 1295 } 1296 1297 static struct sk_buff *qca_dequeue(struct hci_uart *hu) 1298 { 1299 struct qca_data *qca = hu->priv; 1300 1301 return skb_dequeue(&qca->txq); 1302 } 1303 1304 static uint8_t qca_get_baudrate_value(int speed) 1305 { 1306 switch (speed) { 1307 case 9600: 1308 return QCA_BAUDRATE_9600; 1309 case 19200: 1310 return QCA_BAUDRATE_19200; 1311 case 38400: 1312 return QCA_BAUDRATE_38400; 1313 case 57600: 1314 return QCA_BAUDRATE_57600; 1315 case 115200: 1316 return QCA_BAUDRATE_115200; 1317 case 230400: 1318 return QCA_BAUDRATE_230400; 1319 case 460800: 1320 return QCA_BAUDRATE_460800; 1321 case 500000: 1322 return QCA_BAUDRATE_500000; 1323 case 921600: 1324 return QCA_BAUDRATE_921600; 1325 case 1000000: 1326 return QCA_BAUDRATE_1000000; 1327 case 2000000: 1328 return QCA_BAUDRATE_2000000; 1329 case 3000000: 1330 return QCA_BAUDRATE_3000000; 1331 case 3200000: 1332 return QCA_BAUDRATE_3200000; 1333 case 3500000: 1334 return QCA_BAUDRATE_3500000; 1335 default: 1336 return QCA_BAUDRATE_115200; 1337 } 1338 } 1339 1340 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate) 1341 { 1342 struct hci_uart *hu = hci_get_drvdata(hdev); 1343 struct qca_data *qca = hu->priv; 1344 struct sk_buff *skb; 1345 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 }; 1346 1347 if (baudrate > QCA_BAUDRATE_3200000) 1348 return -EINVAL; 1349 1350 cmd[4] = baudrate; 1351 1352 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL); 1353 if (!skb) { 1354 bt_dev_err(hdev, "Failed to allocate baudrate packet"); 1355 return -ENOMEM; 1356 } 1357 1358 /* Assign commands to change baudrate and packet type. */ 1359 skb_put_data(skb, cmd, sizeof(cmd)); 1360 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1361 1362 skb_queue_tail(&qca->txq, skb); 1363 hci_uart_tx_wakeup(hu); 1364 1365 /* Wait for the baudrate change request to be sent */ 1366 1367 while (!skb_queue_empty(&qca->txq)) 1368 usleep_range(100, 200); 1369 1370 if (hu->serdev) 1371 serdev_device_wait_until_sent(hu->serdev, 1372 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); 1373 1374 /* Give the controller time to process the request */ 1375 switch (qca_soc_type(hu)) { 1376 case QCA_WCN3950: 1377 case QCA_WCN3988: 1378 case QCA_WCN3990: 1379 case QCA_WCN3991: 1380 case QCA_WCN3998: 1381 case QCA_WCN6750: 1382 case QCA_WCN6855: 1383 case QCA_WCN7850: 1384 usleep_range(1000, 10000); 1385 break; 1386 1387 default: 1388 msleep(300); 1389 } 1390 1391 return 0; 1392 } 1393 1394 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 1395 { 1396 if (hu->serdev) 1397 serdev_device_set_baudrate(hu->serdev, speed); 1398 else 1399 hci_uart_set_baudrate(hu, speed); 1400 } 1401 1402 static int qca_send_power_pulse(struct hci_uart *hu, bool on) 1403 { 1404 int ret; 1405 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); 1406 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE; 1407 1408 /* These power pulses are single byte command which are sent 1409 * at required baudrate to wcn3990. On wcn3990, we have an external 1410 * circuit at Tx pin which decodes the pulse sent at specific baudrate. 1411 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT 1412 * and also we use the same power inputs to turn on and off for 1413 * Wi-Fi/BT. Powering up the power sources will not enable BT, until 1414 * we send a power on pulse at 115200 bps. This algorithm will help to 1415 * save power. Disabling hardware flow control is mandatory while 1416 * sending power pulses to SoC. 1417 */ 1418 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd); 1419 1420 serdev_device_write_flush(hu->serdev); 1421 hci_uart_set_flow_control(hu, true); 1422 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 1423 if (ret < 0) { 1424 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd); 1425 return ret; 1426 } 1427 1428 serdev_device_wait_until_sent(hu->serdev, timeout); 1429 hci_uart_set_flow_control(hu, false); 1430 1431 /* Give to controller time to boot/shutdown */ 1432 if (on) 1433 msleep(100); 1434 else 1435 usleep_range(1000, 10000); 1436 1437 return 0; 1438 } 1439 1440 static unsigned int qca_get_speed(struct hci_uart *hu, 1441 enum qca_speed_type speed_type) 1442 { 1443 unsigned int speed = 0; 1444 1445 if (speed_type == QCA_INIT_SPEED) { 1446 if (hu->init_speed) 1447 speed = hu->init_speed; 1448 else if (hu->proto->init_speed) 1449 speed = hu->proto->init_speed; 1450 } else { 1451 if (hu->oper_speed) 1452 speed = hu->oper_speed; 1453 else if (hu->proto->oper_speed) 1454 speed = hu->proto->oper_speed; 1455 } 1456 1457 return speed; 1458 } 1459 1460 static int qca_check_speeds(struct hci_uart *hu) 1461 { 1462 switch (qca_soc_type(hu)) { 1463 case QCA_WCN3950: 1464 case QCA_WCN3988: 1465 case QCA_WCN3990: 1466 case QCA_WCN3991: 1467 case QCA_WCN3998: 1468 case QCA_WCN6750: 1469 case QCA_WCN6855: 1470 case QCA_WCN7850: 1471 if (!qca_get_speed(hu, QCA_INIT_SPEED) && 1472 !qca_get_speed(hu, QCA_OPER_SPEED)) 1473 return -EINVAL; 1474 break; 1475 1476 default: 1477 if (!qca_get_speed(hu, QCA_INIT_SPEED) || 1478 !qca_get_speed(hu, QCA_OPER_SPEED)) 1479 return -EINVAL; 1480 } 1481 1482 return 0; 1483 } 1484 1485 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type) 1486 { 1487 unsigned int speed, qca_baudrate; 1488 struct qca_data *qca = hu->priv; 1489 int ret = 0; 1490 1491 if (speed_type == QCA_INIT_SPEED) { 1492 speed = qca_get_speed(hu, QCA_INIT_SPEED); 1493 if (speed) 1494 host_set_baudrate(hu, speed); 1495 } else { 1496 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1497 1498 speed = qca_get_speed(hu, QCA_OPER_SPEED); 1499 if (!speed) 1500 return 0; 1501 1502 /* Disable flow control for wcn3990 to deassert RTS while 1503 * changing the baudrate of chip and host. 1504 */ 1505 switch (soc_type) { 1506 case QCA_WCN3950: 1507 case QCA_WCN3988: 1508 case QCA_WCN3990: 1509 case QCA_WCN3991: 1510 case QCA_WCN3998: 1511 case QCA_WCN6750: 1512 case QCA_WCN6855: 1513 case QCA_WCN7850: 1514 hci_uart_set_flow_control(hu, true); 1515 break; 1516 1517 default: 1518 break; 1519 } 1520 1521 switch (soc_type) { 1522 case QCA_WCN3990: 1523 reinit_completion(&qca->drop_ev_comp); 1524 set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1525 break; 1526 1527 default: 1528 break; 1529 } 1530 1531 qca_baudrate = qca_get_baudrate_value(speed); 1532 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed); 1533 ret = qca_set_baudrate(hu->hdev, qca_baudrate); 1534 if (ret) 1535 goto error; 1536 1537 host_set_baudrate(hu, speed); 1538 1539 error: 1540 switch (soc_type) { 1541 case QCA_WCN3950: 1542 case QCA_WCN3988: 1543 case QCA_WCN3990: 1544 case QCA_WCN3991: 1545 case QCA_WCN3998: 1546 case QCA_WCN6750: 1547 case QCA_WCN6855: 1548 case QCA_WCN7850: 1549 hci_uart_set_flow_control(hu, false); 1550 break; 1551 1552 default: 1553 break; 1554 } 1555 1556 switch (soc_type) { 1557 case QCA_WCN3990: 1558 /* Wait for the controller to send the vendor event 1559 * for the baudrate change command. 1560 */ 1561 if (!wait_for_completion_timeout(&qca->drop_ev_comp, 1562 msecs_to_jiffies(100))) { 1563 bt_dev_err(hu->hdev, 1564 "Failed to change controller baudrate\n"); 1565 ret = -ETIMEDOUT; 1566 } 1567 1568 clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1569 break; 1570 1571 default: 1572 break; 1573 } 1574 } 1575 1576 return ret; 1577 } 1578 1579 static int qca_send_crashbuffer(struct hci_uart *hu) 1580 { 1581 struct qca_data *qca = hu->priv; 1582 struct sk_buff *skb; 1583 1584 skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL); 1585 if (!skb) { 1586 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet"); 1587 return -ENOMEM; 1588 } 1589 1590 /* We forcefully crash the controller, by sending 0xfb byte for 1591 * 1024 times. We also might have chance of losing data, To be 1592 * on safer side we send 1096 bytes to the SoC. 1593 */ 1594 memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE, 1595 QCA_CRASHBYTE_PACKET_LEN); 1596 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1597 bt_dev_info(hu->hdev, "crash the soc to collect controller dump"); 1598 skb_queue_tail(&qca->txq, skb); 1599 hci_uart_tx_wakeup(hu); 1600 1601 return 0; 1602 } 1603 1604 static void qca_wait_for_dump_collection(struct hci_dev *hdev) 1605 { 1606 struct hci_uart *hu = hci_get_drvdata(hdev); 1607 struct qca_data *qca = hu->priv; 1608 1609 wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION, 1610 TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS); 1611 1612 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1613 } 1614 1615 static void qca_hw_error(struct hci_dev *hdev, u8 code) 1616 { 1617 struct hci_uart *hu = hci_get_drvdata(hdev); 1618 struct qca_data *qca = hu->priv; 1619 1620 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1621 set_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1622 bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state); 1623 1624 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1625 /* If hardware error event received for other than QCA 1626 * soc memory dump event, then we need to crash the SOC 1627 * and wait here for 8 seconds to get the dump packets. 1628 * This will block main thread to be on hold until we 1629 * collect dump. 1630 */ 1631 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1632 qca_send_crashbuffer(hu); 1633 qca_wait_for_dump_collection(hdev); 1634 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1635 /* Let us wait here until memory dump collected or 1636 * memory dump timer expired. 1637 */ 1638 bt_dev_info(hdev, "waiting for dump to complete"); 1639 qca_wait_for_dump_collection(hdev); 1640 } 1641 1642 mutex_lock(&qca->hci_memdump_lock); 1643 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1644 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout"); 1645 hci_devcd_abort(hu->hdev); 1646 if (qca->qca_memdump) { 1647 kfree(qca->qca_memdump); 1648 qca->qca_memdump = NULL; 1649 } 1650 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1651 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1652 } 1653 mutex_unlock(&qca->hci_memdump_lock); 1654 1655 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 1656 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 1657 cancel_work_sync(&qca->ctrl_memdump_evt); 1658 skb_queue_purge(&qca->rx_memdump_q); 1659 } 1660 1661 /* 1662 * If the BT chip's bt_en pin is connected to a 3.3V power supply via 1663 * hardware and always stays high, driver cannot control the bt_en pin. 1664 * As a result, during SSR (SubSystem Restart), QCA_SSR_TRIGGERED and 1665 * QCA_IBS_DISABLED flags cannot be cleared, which leads to a reset 1666 * command timeout. 1667 * Add an msleep delay to ensure controller completes the SSR process. 1668 * 1669 * Host will not download the firmware after SSR, controller to remain 1670 * in the IBS_WAKE state, and the host needs to synchronize with it 1671 * 1672 * Since the bluetooth chip has been reset, clear the memdump state. 1673 */ 1674 if (!hci_test_quirk(hu->hdev, HCI_QUIRK_NON_PERSISTENT_SETUP)) { 1675 /* 1676 * When the SSR (SubSystem Restart) duration exceeds 2 seconds, 1677 * it triggers host tx_idle_delay, which sets host TX state 1678 * to sleep. Reset tx_idle_timer after SSR to prevent 1679 * host enter TX IBS_Sleep mode. 1680 */ 1681 mod_timer(&qca->tx_idle_timer, jiffies + 1682 msecs_to_jiffies(qca->tx_idle_delay)); 1683 1684 /* Controller reset completion time is 50ms */ 1685 msleep(50); 1686 1687 clear_bit(QCA_SSR_TRIGGERED, &qca->flags); 1688 clear_bit(QCA_IBS_DISABLED, &qca->flags); 1689 1690 qca->tx_ibs_state = HCI_IBS_TX_AWAKE; 1691 qca->memdump_state = QCA_MEMDUMP_IDLE; 1692 } 1693 1694 clear_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1695 } 1696 1697 static void qca_reset(struct hci_dev *hdev) 1698 { 1699 struct hci_uart *hu = hci_get_drvdata(hdev); 1700 struct qca_data *qca = hu->priv; 1701 1702 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1703 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1704 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1705 qca_send_crashbuffer(hu); 1706 qca_wait_for_dump_collection(hdev); 1707 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1708 /* Let us wait here until memory dump collected or 1709 * memory dump timer expired. 1710 */ 1711 bt_dev_info(hdev, "waiting for dump to complete"); 1712 qca_wait_for_dump_collection(hdev); 1713 } 1714 1715 mutex_lock(&qca->hci_memdump_lock); 1716 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1717 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1718 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 1719 /* Inject hw error event to reset the device 1720 * and driver. 1721 */ 1722 hci_reset_dev(hu->hdev); 1723 } 1724 } 1725 mutex_unlock(&qca->hci_memdump_lock); 1726 } 1727 1728 static bool qca_wakeup(struct hci_dev *hdev) 1729 { 1730 struct hci_uart *hu = hci_get_drvdata(hdev); 1731 bool wakeup; 1732 1733 if (!hu->serdev) 1734 return true; 1735 1736 /* BT SoC attached through the serial bus is handled by the serdev driver. 1737 * So we need to use the device handle of the serdev driver to get the 1738 * status of device may wakeup. 1739 */ 1740 wakeup = device_may_wakeup(&hu->serdev->ctrl->dev); 1741 bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup); 1742 1743 return wakeup; 1744 } 1745 1746 static int qca_port_reopen(struct hci_uart *hu) 1747 { 1748 int ret; 1749 1750 /* Now the device is in ready state to communicate with host. 1751 * To sync host with device we need to reopen port. 1752 * Without this, we will have RTS and CTS synchronization 1753 * issues. 1754 */ 1755 serdev_device_close(hu->serdev); 1756 ret = serdev_device_open(hu->serdev); 1757 if (ret) { 1758 bt_dev_err(hu->hdev, "failed to open port"); 1759 return ret; 1760 } 1761 1762 hci_uart_set_flow_control(hu, false); 1763 1764 return 0; 1765 } 1766 1767 static int qca_regulator_init(struct hci_uart *hu) 1768 { 1769 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1770 struct qca_serdev *qcadev; 1771 int ret; 1772 bool sw_ctrl_state; 1773 1774 /* Check for vregs status, may be hci down has turned 1775 * off the voltage regulator. 1776 */ 1777 qcadev = serdev_device_get_drvdata(hu->serdev); 1778 1779 if (!qcadev->bt_power->vregs_on) { 1780 serdev_device_close(hu->serdev); 1781 ret = qca_regulator_enable(qcadev); 1782 if (ret) 1783 return ret; 1784 1785 ret = serdev_device_open(hu->serdev); 1786 if (ret) { 1787 bt_dev_err(hu->hdev, "failed to open port"); 1788 return ret; 1789 } 1790 } 1791 1792 switch (soc_type) { 1793 case QCA_WCN3950: 1794 case QCA_WCN3988: 1795 case QCA_WCN3990: 1796 case QCA_WCN3991: 1797 case QCA_WCN3998: 1798 /* Forcefully enable wcn399x to enter in to boot mode. */ 1799 host_set_baudrate(hu, 2400); 1800 ret = qca_send_power_pulse(hu, false); 1801 if (ret) 1802 return ret; 1803 break; 1804 1805 default: 1806 break; 1807 } 1808 1809 /* For wcn6750 need to enable gpio bt_en */ 1810 if (qcadev->bt_en) { 1811 gpiod_set_value_cansleep(qcadev->bt_en, 0); 1812 msleep(50); 1813 gpiod_set_value_cansleep(qcadev->bt_en, 1); 1814 msleep(50); 1815 if (qcadev->sw_ctrl) { 1816 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); 1817 bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state); 1818 } 1819 } 1820 1821 qca_set_speed(hu, QCA_INIT_SPEED); 1822 1823 switch (soc_type) { 1824 case QCA_WCN3950: 1825 case QCA_WCN3988: 1826 case QCA_WCN3990: 1827 case QCA_WCN3991: 1828 case QCA_WCN3998: 1829 ret = qca_send_power_pulse(hu, true); 1830 if (ret) 1831 return ret; 1832 break; 1833 1834 default: 1835 break; 1836 } 1837 1838 return qca_port_reopen(hu); 1839 } 1840 1841 static int qca_power_on(struct hci_dev *hdev) 1842 { 1843 struct hci_uart *hu = hci_get_drvdata(hdev); 1844 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1845 struct qca_serdev *qcadev; 1846 struct qca_data *qca = hu->priv; 1847 int ret = 0; 1848 1849 /* Non-serdev device usually is powered by external power 1850 * and don't need additional action in driver for power on 1851 */ 1852 if (!hu->serdev) 1853 return 0; 1854 1855 switch (soc_type) { 1856 case QCA_QCA6390: 1857 case QCA_WCN3950: 1858 case QCA_WCN3988: 1859 case QCA_WCN3990: 1860 case QCA_WCN3991: 1861 case QCA_WCN3998: 1862 case QCA_WCN6750: 1863 case QCA_WCN6855: 1864 case QCA_WCN7850: 1865 ret = qca_regulator_init(hu); 1866 break; 1867 1868 default: 1869 qcadev = serdev_device_get_drvdata(hu->serdev); 1870 if (qcadev->bt_en) { 1871 gpiod_set_value_cansleep(qcadev->bt_en, 1); 1872 /* Controller needs time to bootup. */ 1873 msleep(150); 1874 } 1875 } 1876 1877 clear_bit(QCA_BT_OFF, &qca->flags); 1878 return ret; 1879 } 1880 1881 static void hci_coredump_qca(struct hci_dev *hdev) 1882 { 1883 int err; 1884 static const u8 param[] = { 0x26 }; 1885 1886 err = __hci_cmd_send(hdev, 0xfc0c, 1, param); 1887 if (err < 0) 1888 bt_dev_err(hdev, "%s: trigger crash failed (%d)", __func__, err); 1889 } 1890 1891 static int qca_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id) 1892 { 1893 /* QCA uses 1 as non-HCI data path id for HFP */ 1894 *data_path_id = 1; 1895 return 0; 1896 } 1897 1898 static int qca_configure_hfp_offload(struct hci_dev *hdev) 1899 { 1900 bt_dev_info(hdev, "HFP non-HCI data transport is supported"); 1901 hdev->get_data_path_id = qca_get_data_path_id; 1902 /* Do not need to send HCI_Configure_Data_Path to configure non-HCI 1903 * data transport path for QCA controllers, so set below field as NULL. 1904 */ 1905 hdev->get_codec_config_data = NULL; 1906 return 0; 1907 } 1908 1909 static int qca_setup(struct hci_uart *hu) 1910 { 1911 struct hci_dev *hdev = hu->hdev; 1912 struct qca_data *qca = hu->priv; 1913 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200; 1914 unsigned int retries = 0; 1915 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1916 const char *firmware_name = qca_get_firmware_name(hu); 1917 const char *rampatch_name = qca_get_rampatch_name(hu); 1918 int ret; 1919 struct qca_btsoc_version ver; 1920 struct qca_serdev *qcadev = serdev_device_get_drvdata(hu->serdev); 1921 const char *soc_name; 1922 1923 ret = qca_check_speeds(hu); 1924 if (ret) 1925 return ret; 1926 1927 clear_bit(QCA_ROM_FW, &qca->flags); 1928 /* Patch downloading has to be done without IBS mode */ 1929 set_bit(QCA_IBS_DISABLED, &qca->flags); 1930 1931 /* Enable controller to do both LE scan and BR/EDR inquiry 1932 * simultaneously. 1933 */ 1934 hci_set_quirk(hdev, HCI_QUIRK_SIMULTANEOUS_DISCOVERY); 1935 1936 switch (soc_type) { 1937 case QCA_QCA2066: 1938 soc_name = "qca2066"; 1939 break; 1940 1941 case QCA_WCN3950: 1942 case QCA_WCN3988: 1943 case QCA_WCN3990: 1944 case QCA_WCN3991: 1945 case QCA_WCN3998: 1946 soc_name = "wcn399x"; 1947 break; 1948 1949 case QCA_WCN6750: 1950 soc_name = "wcn6750"; 1951 break; 1952 1953 case QCA_WCN6855: 1954 soc_name = "wcn6855"; 1955 break; 1956 1957 case QCA_WCN7850: 1958 soc_name = "wcn7850"; 1959 break; 1960 1961 default: 1962 soc_name = "ROME/QCA6390"; 1963 } 1964 bt_dev_info(hdev, "setting up %s", soc_name); 1965 1966 qca->memdump_state = QCA_MEMDUMP_IDLE; 1967 1968 retry: 1969 ret = qca_power_on(hdev); 1970 if (ret) 1971 goto out; 1972 1973 clear_bit(QCA_SSR_TRIGGERED, &qca->flags); 1974 1975 switch (soc_type) { 1976 case QCA_WCN3950: 1977 case QCA_WCN3988: 1978 case QCA_WCN3990: 1979 case QCA_WCN3991: 1980 case QCA_WCN3998: 1981 case QCA_WCN6750: 1982 case QCA_WCN6855: 1983 case QCA_WCN7850: 1984 if (qcadev->bdaddr_property_broken) 1985 hci_set_quirk(hdev, HCI_QUIRK_BDADDR_PROPERTY_BROKEN); 1986 1987 hci_set_aosp_capable(hdev); 1988 1989 ret = qca_read_soc_version(hdev, &ver, soc_type); 1990 if (ret) 1991 goto out; 1992 break; 1993 1994 default: 1995 qca_set_speed(hu, QCA_INIT_SPEED); 1996 } 1997 1998 /* Setup user speed if needed */ 1999 speed = qca_get_speed(hu, QCA_OPER_SPEED); 2000 if (speed) { 2001 ret = qca_set_speed(hu, QCA_OPER_SPEED); 2002 if (ret) 2003 goto out; 2004 2005 qca_baudrate = qca_get_baudrate_value(speed); 2006 } 2007 2008 switch (soc_type) { 2009 case QCA_WCN3950: 2010 case QCA_WCN3988: 2011 case QCA_WCN3990: 2012 case QCA_WCN3991: 2013 case QCA_WCN3998: 2014 case QCA_WCN6750: 2015 case QCA_WCN6855: 2016 case QCA_WCN7850: 2017 break; 2018 2019 default: 2020 /* Get QCA version information */ 2021 ret = qca_read_soc_version(hdev, &ver, soc_type); 2022 if (ret) 2023 goto out; 2024 } 2025 2026 /* Setup patch / NVM configurations */ 2027 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver, 2028 firmware_name, rampatch_name); 2029 if (!ret) { 2030 clear_bit(QCA_IBS_DISABLED, &qca->flags); 2031 qca_debugfs_init(hdev); 2032 hu->hdev->hw_error = qca_hw_error; 2033 hu->hdev->reset = qca_reset; 2034 if (hu->serdev) { 2035 if (device_can_wakeup(hu->serdev->ctrl->dev.parent)) 2036 hu->hdev->wakeup = qca_wakeup; 2037 } 2038 } else if (ret == -ENOENT) { 2039 /* No patch/nvm-config found, run with original fw/config */ 2040 set_bit(QCA_ROM_FW, &qca->flags); 2041 ret = 0; 2042 } else if (ret == -EAGAIN) { 2043 /* 2044 * Userspace firmware loader will return -EAGAIN in case no 2045 * patch/nvm-config is found, so run with original fw/config. 2046 */ 2047 set_bit(QCA_ROM_FW, &qca->flags); 2048 ret = 0; 2049 } 2050 2051 out: 2052 if (ret) { 2053 qca_power_off(hu); 2054 2055 if (retries < MAX_INIT_RETRIES) { 2056 bt_dev_warn(hdev, "Retry BT power ON:%d", retries); 2057 if (hu->serdev) { 2058 serdev_device_close(hu->serdev); 2059 ret = serdev_device_open(hu->serdev); 2060 if (ret) { 2061 bt_dev_err(hdev, "failed to open port"); 2062 return ret; 2063 } 2064 } 2065 retries++; 2066 goto retry; 2067 } 2068 return ret; 2069 } 2070 2071 /* Setup bdaddr */ 2072 if (soc_type == QCA_ROME) 2073 hu->hdev->set_bdaddr = qca_set_bdaddr_rome; 2074 else 2075 hu->hdev->set_bdaddr = qca_set_bdaddr; 2076 2077 if (qcadev->support_hfp_hw_offload) 2078 qca_configure_hfp_offload(hdev); 2079 2080 qca->fw_version = le16_to_cpu(ver.patch_ver); 2081 qca->controller_id = le16_to_cpu(ver.rom_ver); 2082 hci_devcd_register(hdev, hci_coredump_qca, qca_dmp_hdr, NULL); 2083 2084 return ret; 2085 } 2086 2087 static const struct hci_uart_proto qca_proto = { 2088 .id = HCI_UART_QCA, 2089 .name = "QCA", 2090 .manufacturer = 29, 2091 .init_speed = 115200, 2092 .oper_speed = 3000000, 2093 .open = qca_open, 2094 .close = qca_close, 2095 .flush = qca_flush, 2096 .setup = qca_setup, 2097 .recv = qca_recv, 2098 .enqueue = qca_enqueue, 2099 .dequeue = qca_dequeue, 2100 }; 2101 2102 static const struct qca_device_data qca_soc_data_qca2066 __maybe_unused = { 2103 .soc_type = QCA_QCA2066, 2104 .num_vregs = 0, 2105 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES | 2106 QCA_CAP_HFP_HW_OFFLOAD, 2107 }; 2108 2109 static const struct qca_device_data qca_soc_data_qca6390 __maybe_unused = { 2110 .soc_type = QCA_QCA6390, 2111 .num_vregs = 0, 2112 }; 2113 2114 static const struct qca_device_data qca_soc_data_wcn3950 __maybe_unused = { 2115 .soc_type = QCA_WCN3950, 2116 .vregs = (struct qca_vreg []) { 2117 { "vddio", 15000 }, 2118 { "vddxo", 60000 }, 2119 { "vddrf", 155000 }, 2120 { "vddch0", 585000 }, 2121 }, 2122 .num_vregs = 4, 2123 }; 2124 2125 static const struct qca_device_data qca_soc_data_wcn3988 __maybe_unused = { 2126 .soc_type = QCA_WCN3988, 2127 .vregs = (struct qca_vreg []) { 2128 { "vddio", 15000 }, 2129 { "vddxo", 80000 }, 2130 { "vddrf", 300000 }, 2131 { "vddch0", 450000 }, 2132 }, 2133 .num_vregs = 4, 2134 }; 2135 2136 static const struct qca_device_data qca_soc_data_wcn3990 __maybe_unused = { 2137 .soc_type = QCA_WCN3990, 2138 .vregs = (struct qca_vreg []) { 2139 { "vddio", 15000 }, 2140 { "vddxo", 80000 }, 2141 { "vddrf", 300000 }, 2142 { "vddch0", 450000 }, 2143 }, 2144 .num_vregs = 4, 2145 }; 2146 2147 static const struct qca_device_data qca_soc_data_wcn3991 __maybe_unused = { 2148 .soc_type = QCA_WCN3991, 2149 .vregs = (struct qca_vreg []) { 2150 { "vddio", 15000 }, 2151 { "vddxo", 80000 }, 2152 { "vddrf", 300000 }, 2153 { "vddch0", 450000 }, 2154 }, 2155 .num_vregs = 4, 2156 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES, 2157 }; 2158 2159 static const struct qca_device_data qca_soc_data_wcn3998 __maybe_unused = { 2160 .soc_type = QCA_WCN3998, 2161 .vregs = (struct qca_vreg []) { 2162 { "vddio", 10000 }, 2163 { "vddxo", 80000 }, 2164 { "vddrf", 300000 }, 2165 { "vddch0", 450000 }, 2166 }, 2167 .num_vregs = 4, 2168 }; 2169 2170 static const struct qca_device_data qca_soc_data_wcn6750 __maybe_unused = { 2171 .soc_type = QCA_WCN6750, 2172 .vregs = (struct qca_vreg []) { 2173 { "vddio", 5000 }, 2174 { "vddaon", 26000 }, 2175 { "vddbtcxmx", 126000 }, 2176 { "vddrfacmn", 12500 }, 2177 { "vddrfa0p8", 102000 }, 2178 { "vddrfa1p7", 302000 }, 2179 { "vddrfa1p2", 257000 }, 2180 { "vddrfa2p2", 1700000 }, 2181 { "vddasd", 200 }, 2182 }, 2183 .num_vregs = 9, 2184 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES, 2185 }; 2186 2187 static const struct qca_device_data qca_soc_data_wcn6855 __maybe_unused = { 2188 .soc_type = QCA_WCN6855, 2189 .vregs = (struct qca_vreg []) { 2190 { "vddio", 5000 }, 2191 { "vddbtcxmx", 126000 }, 2192 { "vddrfacmn", 12500 }, 2193 { "vddrfa0p8", 102000 }, 2194 { "vddrfa1p7", 302000 }, 2195 { "vddrfa1p2", 257000 }, 2196 }, 2197 .num_vregs = 6, 2198 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES | 2199 QCA_CAP_HFP_HW_OFFLOAD, 2200 }; 2201 2202 static const struct qca_device_data qca_soc_data_wcn7850 __maybe_unused = { 2203 .soc_type = QCA_WCN7850, 2204 .vregs = (struct qca_vreg []) { 2205 { "vddio", 5000 }, 2206 { "vddaon", 26000 }, 2207 { "vdddig", 126000 }, 2208 { "vddrfa0p8", 102000 }, 2209 { "vddrfa1p2", 257000 }, 2210 { "vddrfa1p9", 302000 }, 2211 }, 2212 .num_vregs = 6, 2213 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES | 2214 QCA_CAP_HFP_HW_OFFLOAD, 2215 }; 2216 2217 static void qca_power_off(struct hci_uart *hu) 2218 { 2219 struct qca_serdev *qcadev; 2220 struct qca_data *qca = hu->priv; 2221 unsigned long flags; 2222 enum qca_btsoc_type soc_type = qca_soc_type(hu); 2223 bool sw_ctrl_state; 2224 struct qca_power *power; 2225 2226 /* From this point we go into power off state. But serial port is 2227 * still open, stop queueing the IBS data and flush all the buffered 2228 * data in skb's. 2229 */ 2230 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 2231 set_bit(QCA_IBS_DISABLED, &qca->flags); 2232 qca_flush(hu); 2233 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 2234 2235 /* Non-serdev device usually is powered by external power 2236 * and don't need additional action in driver for power down 2237 */ 2238 if (!hu->serdev) 2239 return; 2240 2241 qcadev = serdev_device_get_drvdata(hu->serdev); 2242 power = qcadev->bt_power; 2243 2244 switch (soc_type) { 2245 case QCA_WCN3988: 2246 case QCA_WCN3990: 2247 case QCA_WCN3991: 2248 case QCA_WCN3998: 2249 host_set_baudrate(hu, 2400); 2250 qca_send_power_pulse(hu, false); 2251 break; 2252 default: 2253 break; 2254 } 2255 2256 if (power && power->pwrseq) { 2257 pwrseq_power_off(power->pwrseq); 2258 set_bit(QCA_BT_OFF, &qca->flags); 2259 return; 2260 } 2261 2262 switch (soc_type) { 2263 case QCA_WCN3988: 2264 case QCA_WCN3990: 2265 case QCA_WCN3991: 2266 case QCA_WCN3998: 2267 qca_regulator_disable(qcadev); 2268 break; 2269 2270 case QCA_WCN6750: 2271 case QCA_WCN6855: 2272 gpiod_set_value_cansleep(qcadev->bt_en, 0); 2273 msleep(100); 2274 qca_regulator_disable(qcadev); 2275 if (qcadev->sw_ctrl) { 2276 sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); 2277 BT_DBG("SW_CTRL is %d", sw_ctrl_state); 2278 } 2279 break; 2280 2281 default: 2282 gpiod_set_value_cansleep(qcadev->bt_en, 0); 2283 } 2284 2285 set_bit(QCA_BT_OFF, &qca->flags); 2286 } 2287 2288 static int qca_hci_shutdown(struct hci_dev *hdev) 2289 { 2290 struct hci_uart *hu = hci_get_drvdata(hdev); 2291 struct qca_data *qca = hu->priv; 2292 enum qca_btsoc_type soc_type = qca_soc_type(hu); 2293 2294 hu->hdev->hw_error = NULL; 2295 hu->hdev->reset = NULL; 2296 2297 timer_delete_sync(&qca->wake_retrans_timer); 2298 timer_delete_sync(&qca->tx_idle_timer); 2299 2300 /* Stop sending shutdown command if soc crashes. */ 2301 if (soc_type != QCA_ROME 2302 && qca->memdump_state == QCA_MEMDUMP_IDLE) { 2303 qca_send_pre_shutdown_cmd(hdev); 2304 usleep_range(8000, 10000); 2305 } 2306 2307 qca_power_off(hu); 2308 return 0; 2309 } 2310 2311 static int qca_regulator_enable(struct qca_serdev *qcadev) 2312 { 2313 struct qca_power *power = qcadev->bt_power; 2314 int ret; 2315 2316 if (power->pwrseq) 2317 return pwrseq_power_on(power->pwrseq); 2318 2319 /* Already enabled */ 2320 if (power->vregs_on) 2321 return 0; 2322 2323 BT_DBG("enabling %d regulators)", power->num_vregs); 2324 2325 ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk); 2326 if (ret) 2327 return ret; 2328 2329 power->vregs_on = true; 2330 2331 ret = clk_prepare_enable(qcadev->susclk); 2332 if (ret) 2333 qca_regulator_disable(qcadev); 2334 2335 return ret; 2336 } 2337 2338 static void qca_regulator_disable(struct qca_serdev *qcadev) 2339 { 2340 struct qca_power *power; 2341 2342 if (!qcadev) 2343 return; 2344 2345 power = qcadev->bt_power; 2346 2347 /* Already disabled? */ 2348 if (!power->vregs_on) 2349 return; 2350 2351 regulator_bulk_disable(power->num_vregs, power->vreg_bulk); 2352 power->vregs_on = false; 2353 2354 clk_disable_unprepare(qcadev->susclk); 2355 } 2356 2357 static int qca_init_regulators(struct qca_power *qca, 2358 const struct qca_vreg *vregs, size_t num_vregs) 2359 { 2360 struct regulator_bulk_data *bulk; 2361 int ret; 2362 int i; 2363 2364 bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL); 2365 if (!bulk) 2366 return -ENOMEM; 2367 2368 for (i = 0; i < num_vregs; i++) 2369 bulk[i].supply = vregs[i].name; 2370 2371 ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk); 2372 if (ret < 0) 2373 return ret; 2374 2375 for (i = 0; i < num_vregs; i++) { 2376 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA); 2377 if (ret) 2378 return ret; 2379 } 2380 2381 qca->vreg_bulk = bulk; 2382 qca->num_vregs = num_vregs; 2383 2384 return 0; 2385 } 2386 2387 static int qca_serdev_probe(struct serdev_device *serdev) 2388 { 2389 struct qca_serdev *qcadev; 2390 struct hci_dev *hdev; 2391 const struct qca_device_data *data; 2392 int err; 2393 bool power_ctrl_enabled = true; 2394 2395 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL); 2396 if (!qcadev) 2397 return -ENOMEM; 2398 2399 qcadev->serdev_hu.serdev = serdev; 2400 data = device_get_match_data(&serdev->dev); 2401 serdev_device_set_drvdata(serdev, qcadev); 2402 device_property_read_string_array(&serdev->dev, "firmware-name", 2403 qcadev->firmware_name, ARRAY_SIZE(qcadev->firmware_name)); 2404 device_property_read_u32(&serdev->dev, "max-speed", 2405 &qcadev->oper_speed); 2406 if (!qcadev->oper_speed) 2407 BT_DBG("UART will pick default operating speed"); 2408 2409 qcadev->bdaddr_property_broken = device_property_read_bool(&serdev->dev, 2410 "qcom,local-bd-address-broken"); 2411 2412 if (data) 2413 qcadev->btsoc_type = data->soc_type; 2414 else 2415 qcadev->btsoc_type = QCA_ROME; 2416 2417 switch (qcadev->btsoc_type) { 2418 case QCA_QCA6390: 2419 case QCA_WCN3950: 2420 case QCA_WCN3988: 2421 case QCA_WCN3990: 2422 case QCA_WCN3991: 2423 case QCA_WCN3998: 2424 case QCA_WCN6750: 2425 case QCA_WCN6855: 2426 case QCA_WCN7850: 2427 qcadev->bt_power = devm_kzalloc(&serdev->dev, 2428 sizeof(struct qca_power), 2429 GFP_KERNEL); 2430 if (!qcadev->bt_power) 2431 return -ENOMEM; 2432 break; 2433 default: 2434 break; 2435 } 2436 2437 switch (qcadev->btsoc_type) { 2438 case QCA_WCN3950: 2439 case QCA_WCN3988: 2440 case QCA_WCN3990: 2441 case QCA_WCN3991: 2442 case QCA_WCN3998: 2443 case QCA_WCN6750: 2444 case QCA_WCN6855: 2445 case QCA_WCN7850: 2446 if (!device_property_present(&serdev->dev, "enable-gpios")) { 2447 /* 2448 * Backward compatibility with old DT sources. If the 2449 * node doesn't have the 'enable-gpios' property then 2450 * let's use the power sequencer. Otherwise, let's 2451 * drive everything ourselves. 2452 */ 2453 qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev, 2454 "bluetooth"); 2455 2456 /* 2457 * Some modules have BT_EN enabled via a hardware pull-up, 2458 * meaning it is not defined in the DTS and is not controlled 2459 * through the power sequence. In such cases, fall through 2460 * to follow the legacy flow. 2461 */ 2462 if (IS_ERR(qcadev->bt_power->pwrseq)) 2463 qcadev->bt_power->pwrseq = NULL; 2464 else 2465 break; 2466 } 2467 2468 qcadev->bt_power->dev = &serdev->dev; 2469 err = qca_init_regulators(qcadev->bt_power, data->vregs, 2470 data->num_vregs); 2471 if (err) { 2472 BT_ERR("Failed to init regulators:%d", err); 2473 return err; 2474 } 2475 2476 qcadev->bt_power->vregs_on = false; 2477 2478 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", 2479 GPIOD_OUT_LOW); 2480 if (IS_ERR(qcadev->bt_en)) 2481 return dev_err_probe(&serdev->dev, 2482 PTR_ERR(qcadev->bt_en), 2483 "failed to acquire BT_EN gpio\n"); 2484 2485 if (!qcadev->bt_en && 2486 (data->soc_type == QCA_WCN6750 || 2487 data->soc_type == QCA_WCN6855 || 2488 data->soc_type == QCA_WCN7850)) 2489 power_ctrl_enabled = false; 2490 2491 qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl", 2492 GPIOD_IN); 2493 if (IS_ERR(qcadev->sw_ctrl) && 2494 (data->soc_type == QCA_WCN6750 || 2495 data->soc_type == QCA_WCN6855 || 2496 data->soc_type == QCA_WCN7850)) { 2497 dev_err(&serdev->dev, "failed to acquire SW_CTRL gpio\n"); 2498 return PTR_ERR(qcadev->sw_ctrl); 2499 } 2500 2501 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); 2502 if (IS_ERR(qcadev->susclk)) { 2503 dev_err(&serdev->dev, "failed to acquire clk\n"); 2504 return PTR_ERR(qcadev->susclk); 2505 } 2506 break; 2507 2508 case QCA_QCA6390: 2509 if (dev_of_node(&serdev->dev)) { 2510 qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev, 2511 "bluetooth"); 2512 if (IS_ERR(qcadev->bt_power->pwrseq)) 2513 return PTR_ERR(qcadev->bt_power->pwrseq); 2514 break; 2515 } 2516 fallthrough; 2517 2518 default: 2519 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", 2520 GPIOD_OUT_LOW); 2521 if (IS_ERR(qcadev->bt_en)) { 2522 dev_err(&serdev->dev, "failed to acquire enable gpio\n"); 2523 return PTR_ERR(qcadev->bt_en); 2524 } 2525 2526 if (!qcadev->bt_en) 2527 power_ctrl_enabled = false; 2528 2529 qcadev->susclk = devm_clk_get_optional_enabled_with_rate( 2530 &serdev->dev, NULL, SUSCLK_RATE_32KHZ); 2531 if (IS_ERR(qcadev->susclk)) { 2532 dev_warn(&serdev->dev, "failed to acquire clk\n"); 2533 return PTR_ERR(qcadev->susclk); 2534 } 2535 } 2536 2537 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); 2538 if (err) { 2539 BT_ERR("serdev registration failed"); 2540 return err; 2541 } 2542 2543 hdev = qcadev->serdev_hu.hdev; 2544 2545 if (power_ctrl_enabled) { 2546 hci_set_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_SETUP); 2547 hdev->shutdown = qca_hci_shutdown; 2548 } 2549 2550 if (data) { 2551 /* Wideband speech support must be set per driver since it can't 2552 * be queried via hci. Same with the valid le states quirk. 2553 */ 2554 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH) 2555 hci_set_quirk(hdev, 2556 HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED); 2557 2558 if (!(data->capabilities & QCA_CAP_VALID_LE_STATES)) 2559 hci_set_quirk(hdev, HCI_QUIRK_BROKEN_LE_STATES); 2560 2561 if (data->capabilities & QCA_CAP_HFP_HW_OFFLOAD) 2562 qcadev->support_hfp_hw_offload = true; 2563 } 2564 2565 return 0; 2566 } 2567 2568 static void qca_serdev_remove(struct serdev_device *serdev) 2569 { 2570 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2571 struct qca_power *power = qcadev->bt_power; 2572 2573 switch (qcadev->btsoc_type) { 2574 case QCA_WCN3988: 2575 case QCA_WCN3990: 2576 case QCA_WCN3991: 2577 case QCA_WCN3998: 2578 case QCA_WCN6750: 2579 case QCA_WCN6855: 2580 case QCA_WCN7850: 2581 if (power->vregs_on) 2582 qca_power_off(&qcadev->serdev_hu); 2583 break; 2584 default: 2585 break; 2586 } 2587 2588 hci_uart_unregister_device(&qcadev->serdev_hu); 2589 } 2590 2591 static void qca_serdev_shutdown(struct serdev_device *serdev) 2592 { 2593 int ret; 2594 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); 2595 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2596 struct hci_uart *hu = &qcadev->serdev_hu; 2597 struct hci_dev *hdev = hu->hdev; 2598 const u8 ibs_wake_cmd[] = { 0xFD }; 2599 const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 }; 2600 2601 if (qcadev->btsoc_type == QCA_QCA6390) { 2602 /* The purpose of sending the VSC is to reset SOC into a initial 2603 * state and the state will ensure next hdev->setup() success. 2604 * if HCI_QUIRK_NON_PERSISTENT_SETUP is set, it means that 2605 * hdev->setup() can do its job regardless of SoC state, so 2606 * don't need to send the VSC. 2607 * if HCI_SETUP is set, it means that hdev->setup() was never 2608 * invoked and the SOC is already in the initial state, so 2609 * don't also need to send the VSC. 2610 */ 2611 if (hci_test_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_SETUP) || 2612 hci_dev_test_flag(hdev, HCI_SETUP)) 2613 return; 2614 2615 /* The serdev must be in open state when control logic arrives 2616 * here, so also fix the use-after-free issue caused by that 2617 * the serdev is flushed or wrote after it is closed. 2618 */ 2619 serdev_device_write_flush(serdev); 2620 ret = serdev_device_write_buf(serdev, ibs_wake_cmd, 2621 sizeof(ibs_wake_cmd)); 2622 if (ret < 0) { 2623 BT_ERR("QCA send IBS_WAKE_IND error: %d", ret); 2624 return; 2625 } 2626 serdev_device_wait_until_sent(serdev, timeout); 2627 usleep_range(8000, 10000); 2628 2629 serdev_device_write_flush(serdev); 2630 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd, 2631 sizeof(edl_reset_soc_cmd)); 2632 if (ret < 0) { 2633 BT_ERR("QCA send EDL_RESET_REQ error: %d", ret); 2634 return; 2635 } 2636 serdev_device_wait_until_sent(serdev, timeout); 2637 usleep_range(8000, 10000); 2638 } 2639 } 2640 2641 static int __maybe_unused qca_suspend(struct device *dev) 2642 { 2643 struct serdev_device *serdev = to_serdev_device(dev); 2644 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2645 struct hci_uart *hu = &qcadev->serdev_hu; 2646 struct qca_data *qca = hu->priv; 2647 unsigned long flags; 2648 bool tx_pending = false; 2649 int ret = 0; 2650 u8 cmd; 2651 u32 wait_timeout = 0; 2652 2653 set_bit(QCA_SUSPENDING, &qca->flags); 2654 2655 /* if BT SoC is running with default firmware then it does not 2656 * support in-band sleep 2657 */ 2658 if (test_bit(QCA_ROM_FW, &qca->flags)) 2659 return 0; 2660 2661 /* During SSR after memory dump collection, controller will be 2662 * powered off and then powered on.If controller is powered off 2663 * during SSR then we should wait until SSR is completed. 2664 */ 2665 if (test_bit(QCA_BT_OFF, &qca->flags) && 2666 !test_bit(QCA_SSR_TRIGGERED, &qca->flags)) 2667 return 0; 2668 2669 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 2670 test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 2671 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ? 2672 IBS_DISABLE_SSR_TIMEOUT_MS : 2673 FW_DOWNLOAD_TIMEOUT_MS; 2674 2675 /* QCA_IBS_DISABLED flag is set to true, During FW download 2676 * and during memory dump collection. It is reset to false, 2677 * After FW download complete. 2678 */ 2679 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED, 2680 TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout)); 2681 2682 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) { 2683 bt_dev_err(hu->hdev, "SSR or FW download time out"); 2684 ret = -ETIMEDOUT; 2685 goto error; 2686 } 2687 } 2688 2689 cancel_work_sync(&qca->ws_awake_device); 2690 cancel_work_sync(&qca->ws_awake_rx); 2691 2692 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 2693 flags, SINGLE_DEPTH_NESTING); 2694 2695 switch (qca->tx_ibs_state) { 2696 case HCI_IBS_TX_WAKING: 2697 timer_delete(&qca->wake_retrans_timer); 2698 fallthrough; 2699 case HCI_IBS_TX_AWAKE: 2700 timer_delete(&qca->tx_idle_timer); 2701 2702 serdev_device_write_flush(hu->serdev); 2703 cmd = HCI_IBS_SLEEP_IND; 2704 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 2705 2706 if (ret < 0) { 2707 BT_ERR("Failed to send SLEEP to device"); 2708 break; 2709 } 2710 2711 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 2712 qca->ibs_sent_slps++; 2713 tx_pending = true; 2714 break; 2715 2716 case HCI_IBS_TX_ASLEEP: 2717 break; 2718 2719 default: 2720 BT_ERR("Spurious tx state %d", qca->tx_ibs_state); 2721 ret = -EINVAL; 2722 break; 2723 } 2724 2725 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 2726 2727 if (ret < 0) 2728 goto error; 2729 2730 if (tx_pending) { 2731 serdev_device_wait_until_sent(hu->serdev, 2732 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); 2733 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 2734 } 2735 2736 /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going 2737 * to sleep, so that the packet does not wake the system later. 2738 */ 2739 ret = wait_event_interruptible_timeout(qca->suspend_wait_q, 2740 qca->rx_ibs_state == HCI_IBS_RX_ASLEEP, 2741 msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS)); 2742 if (ret == 0) { 2743 ret = -ETIMEDOUT; 2744 goto error; 2745 } 2746 2747 return 0; 2748 2749 error: 2750 clear_bit(QCA_SUSPENDING, &qca->flags); 2751 2752 return ret; 2753 } 2754 2755 static int __maybe_unused qca_resume(struct device *dev) 2756 { 2757 struct serdev_device *serdev = to_serdev_device(dev); 2758 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2759 struct hci_uart *hu = &qcadev->serdev_hu; 2760 struct qca_data *qca = hu->priv; 2761 2762 clear_bit(QCA_SUSPENDING, &qca->flags); 2763 2764 return 0; 2765 } 2766 2767 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume); 2768 2769 #ifdef CONFIG_OF 2770 static const struct of_device_id qca_bluetooth_of_match[] = { 2771 { .compatible = "qcom,qca2066-bt", .data = &qca_soc_data_qca2066}, 2772 { .compatible = "qcom,qca6174-bt" }, 2773 { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390}, 2774 { .compatible = "qcom,qca9377-bt" }, 2775 { .compatible = "qcom,wcn3950-bt", .data = &qca_soc_data_wcn3950}, 2776 { .compatible = "qcom,wcn3988-bt", .data = &qca_soc_data_wcn3988}, 2777 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990}, 2778 { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991}, 2779 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998}, 2780 { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750}, 2781 { .compatible = "qcom,wcn6855-bt", .data = &qca_soc_data_wcn6855}, 2782 { .compatible = "qcom,wcn7850-bt", .data = &qca_soc_data_wcn7850}, 2783 { /* sentinel */ } 2784 }; 2785 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match); 2786 #endif 2787 2788 #ifdef CONFIG_ACPI 2789 static const struct acpi_device_id qca_bluetooth_acpi_match[] = { 2790 { "QCOM2066", (kernel_ulong_t)&qca_soc_data_qca2066 }, 2791 { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2792 { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2793 { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2794 { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2795 { }, 2796 }; 2797 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match); 2798 #endif 2799 2800 #ifdef CONFIG_DEV_COREDUMP 2801 static void hciqca_coredump(struct device *dev) 2802 { 2803 struct serdev_device *serdev = to_serdev_device(dev); 2804 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2805 struct hci_uart *hu = &qcadev->serdev_hu; 2806 struct hci_dev *hdev = hu->hdev; 2807 2808 if (hdev->dump.coredump) 2809 hdev->dump.coredump(hdev); 2810 } 2811 #endif 2812 2813 static struct serdev_device_driver qca_serdev_driver = { 2814 .probe = qca_serdev_probe, 2815 .remove = qca_serdev_remove, 2816 .shutdown = qca_serdev_shutdown, 2817 .driver = { 2818 .name = "hci_uart_qca", 2819 .of_match_table = of_match_ptr(qca_bluetooth_of_match), 2820 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match), 2821 .pm = &qca_pm_ops, 2822 #ifdef CONFIG_DEV_COREDUMP 2823 .coredump = hciqca_coredump, 2824 #endif 2825 }, 2826 }; 2827 2828 int __init qca_init(void) 2829 { 2830 serdev_device_driver_register(&qca_serdev_driver); 2831 2832 return hci_uart_register_proto(&qca_proto); 2833 } 2834 2835 int __exit qca_deinit(void) 2836 { 2837 serdev_device_driver_unregister(&qca_serdev_driver); 2838 2839 return hci_uart_unregister_proto(&qca_proto); 2840 } 2841