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