1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Bluetooth Software UART Qualcomm protocol 4 * 5 * HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management 6 * protocol extension to H4. 7 * 8 * Copyright (C) 2007 Texas Instruments, Inc. 9 * Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved. 10 * 11 * Acknowledgements: 12 * This file is based on hci_ll.c, which was... 13 * Written by Ohad Ben-Cohen <ohad@bencohen.org> 14 * which was in turn based on hci_h4.c, which was written 15 * by Maxim Krasnyansky and Marcel Holtmann. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/clk.h> 20 #include <linux/completion.h> 21 #include <linux/debugfs.h> 22 #include <linux/delay.h> 23 #include <linux/devcoredump.h> 24 #include <linux/device.h> 25 #include <linux/gpio/consumer.h> 26 #include <linux/mod_devicetable.h> 27 #include <linux/module.h> 28 #include <linux/of_device.h> 29 #include <linux/acpi.h> 30 #include <linux/platform_device.h> 31 #include <linux/regulator/consumer.h> 32 #include <linux/serdev.h> 33 #include <linux/mutex.h> 34 #include <asm/unaligned.h> 35 36 #include <net/bluetooth/bluetooth.h> 37 #include <net/bluetooth/hci_core.h> 38 39 #include "hci_uart.h" 40 #include "btqca.h" 41 42 /* HCI_IBS protocol messages */ 43 #define HCI_IBS_SLEEP_IND 0xFE 44 #define HCI_IBS_WAKE_IND 0xFD 45 #define HCI_IBS_WAKE_ACK 0xFC 46 #define HCI_MAX_IBS_SIZE 10 47 48 #define IBS_WAKE_RETRANS_TIMEOUT_MS 100 49 #define IBS_BTSOC_TX_IDLE_TIMEOUT_MS 200 50 #define IBS_HOST_TX_IDLE_TIMEOUT_MS 2000 51 #define CMD_TRANS_TIMEOUT_MS 100 52 #define MEMDUMP_TIMEOUT_MS 8000 53 #define IBS_DISABLE_SSR_TIMEOUT_MS \ 54 (MEMDUMP_TIMEOUT_MS + FW_DOWNLOAD_TIMEOUT_MS) 55 #define FW_DOWNLOAD_TIMEOUT_MS 3000 56 57 /* susclk rate */ 58 #define SUSCLK_RATE_32KHZ 32768 59 60 /* Controller debug log header */ 61 #define QCA_DEBUG_HANDLE 0x2EDC 62 63 /* max retry count when init fails */ 64 #define MAX_INIT_RETRIES 3 65 66 /* Controller dump header */ 67 #define QCA_SSR_DUMP_HANDLE 0x0108 68 #define QCA_DUMP_PACKET_SIZE 255 69 #define QCA_LAST_SEQUENCE_NUM 0xFFFF 70 #define QCA_CRASHBYTE_PACKET_LEN 1096 71 #define QCA_MEMDUMP_BYTE 0xFB 72 73 enum qca_flags { 74 QCA_IBS_DISABLED, 75 QCA_DROP_VENDOR_EVENT, 76 QCA_SUSPENDING, 77 QCA_MEMDUMP_COLLECTION, 78 QCA_HW_ERROR_EVENT, 79 QCA_SSR_TRIGGERED, 80 QCA_BT_OFF, 81 QCA_ROM_FW 82 }; 83 84 enum qca_capabilities { 85 QCA_CAP_WIDEBAND_SPEECH = BIT(0), 86 QCA_CAP_VALID_LE_STATES = BIT(1), 87 }; 88 89 /* HCI_IBS transmit side sleep protocol states */ 90 enum tx_ibs_states { 91 HCI_IBS_TX_ASLEEP, 92 HCI_IBS_TX_WAKING, 93 HCI_IBS_TX_AWAKE, 94 }; 95 96 /* HCI_IBS receive side sleep protocol states */ 97 enum rx_states { 98 HCI_IBS_RX_ASLEEP, 99 HCI_IBS_RX_AWAKE, 100 }; 101 102 /* HCI_IBS transmit and receive side clock state vote */ 103 enum hci_ibs_clock_state_vote { 104 HCI_IBS_VOTE_STATS_UPDATE, 105 HCI_IBS_TX_VOTE_CLOCK_ON, 106 HCI_IBS_TX_VOTE_CLOCK_OFF, 107 HCI_IBS_RX_VOTE_CLOCK_ON, 108 HCI_IBS_RX_VOTE_CLOCK_OFF, 109 }; 110 111 /* Controller memory dump states */ 112 enum qca_memdump_states { 113 QCA_MEMDUMP_IDLE, 114 QCA_MEMDUMP_COLLECTING, 115 QCA_MEMDUMP_COLLECTED, 116 QCA_MEMDUMP_TIMEOUT, 117 }; 118 119 struct qca_memdump_data { 120 char *memdump_buf_head; 121 char *memdump_buf_tail; 122 u32 current_seq_no; 123 u32 received_dump; 124 u32 ram_dump_size; 125 }; 126 127 struct qca_memdump_event_hdr { 128 __u8 evt; 129 __u8 plen; 130 __u16 opcode; 131 __u16 seq_no; 132 __u8 reserved; 133 } __packed; 134 135 136 struct qca_dump_size { 137 u32 dump_size; 138 } __packed; 139 140 struct qca_data { 141 struct hci_uart *hu; 142 struct sk_buff *rx_skb; 143 struct sk_buff_head txq; 144 struct sk_buff_head tx_wait_q; /* HCI_IBS wait queue */ 145 struct sk_buff_head rx_memdump_q; /* Memdump wait queue */ 146 spinlock_t hci_ibs_lock; /* HCI_IBS state lock */ 147 u8 tx_ibs_state; /* HCI_IBS transmit side power state*/ 148 u8 rx_ibs_state; /* HCI_IBS receive side power state */ 149 bool tx_vote; /* Clock must be on for TX */ 150 bool rx_vote; /* Clock must be on for RX */ 151 struct timer_list tx_idle_timer; 152 u32 tx_idle_delay; 153 struct timer_list wake_retrans_timer; 154 u32 wake_retrans; 155 struct workqueue_struct *workqueue; 156 struct work_struct ws_awake_rx; 157 struct work_struct ws_awake_device; 158 struct work_struct ws_rx_vote_off; 159 struct work_struct ws_tx_vote_off; 160 struct work_struct ctrl_memdump_evt; 161 struct delayed_work ctrl_memdump_timeout; 162 struct qca_memdump_data *qca_memdump; 163 unsigned long flags; 164 struct completion drop_ev_comp; 165 wait_queue_head_t suspend_wait_q; 166 enum qca_memdump_states memdump_state; 167 struct mutex hci_memdump_lock; 168 169 /* For debugging purpose */ 170 u64 ibs_sent_wacks; 171 u64 ibs_sent_slps; 172 u64 ibs_sent_wakes; 173 u64 ibs_recv_wacks; 174 u64 ibs_recv_slps; 175 u64 ibs_recv_wakes; 176 u64 vote_last_jif; 177 u32 vote_on_ms; 178 u32 vote_off_ms; 179 u64 tx_votes_on; 180 u64 rx_votes_on; 181 u64 tx_votes_off; 182 u64 rx_votes_off; 183 u64 votes_on; 184 u64 votes_off; 185 }; 186 187 enum qca_speed_type { 188 QCA_INIT_SPEED = 1, 189 QCA_OPER_SPEED 190 }; 191 192 /* 193 * Voltage regulator information required for configuring the 194 * QCA Bluetooth chipset 195 */ 196 struct qca_vreg { 197 const char *name; 198 unsigned int load_uA; 199 }; 200 201 struct qca_device_data { 202 enum qca_btsoc_type soc_type; 203 struct qca_vreg *vregs; 204 size_t num_vregs; 205 uint32_t capabilities; 206 }; 207 208 /* 209 * Platform data for the QCA Bluetooth power driver. 210 */ 211 struct qca_power { 212 struct device *dev; 213 struct regulator_bulk_data *vreg_bulk; 214 int num_vregs; 215 bool vregs_on; 216 }; 217 218 struct qca_serdev { 219 struct hci_uart serdev_hu; 220 struct gpio_desc *bt_en; 221 struct clk *susclk; 222 enum qca_btsoc_type btsoc_type; 223 struct qca_power *bt_power; 224 u32 init_speed; 225 u32 oper_speed; 226 const char *firmware_name; 227 }; 228 229 static int qca_regulator_enable(struct qca_serdev *qcadev); 230 static void qca_regulator_disable(struct qca_serdev *qcadev); 231 static void qca_power_shutdown(struct hci_uart *hu); 232 static int qca_power_off(struct hci_dev *hdev); 233 static void qca_controller_memdump(struct work_struct *work); 234 235 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu) 236 { 237 enum qca_btsoc_type soc_type; 238 239 if (hu->serdev) { 240 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 241 242 soc_type = qsd->btsoc_type; 243 } else { 244 soc_type = QCA_ROME; 245 } 246 247 return soc_type; 248 } 249 250 static const char *qca_get_firmware_name(struct hci_uart *hu) 251 { 252 if (hu->serdev) { 253 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev); 254 255 return qsd->firmware_name; 256 } else { 257 return NULL; 258 } 259 } 260 261 static void __serial_clock_on(struct tty_struct *tty) 262 { 263 /* TODO: Some chipset requires to enable UART clock on client 264 * side to save power consumption or manual work is required. 265 * Please put your code to control UART clock here if needed 266 */ 267 } 268 269 static void __serial_clock_off(struct tty_struct *tty) 270 { 271 /* TODO: Some chipset requires to disable UART clock on client 272 * side to save power consumption or manual work is required. 273 * Please put your code to control UART clock off here if needed 274 */ 275 } 276 277 /* serial_clock_vote needs to be called with the ibs lock held */ 278 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu) 279 { 280 struct qca_data *qca = hu->priv; 281 unsigned int diff; 282 283 bool old_vote = (qca->tx_vote | qca->rx_vote); 284 bool new_vote; 285 286 switch (vote) { 287 case HCI_IBS_VOTE_STATS_UPDATE: 288 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 289 290 if (old_vote) 291 qca->vote_off_ms += diff; 292 else 293 qca->vote_on_ms += diff; 294 return; 295 296 case HCI_IBS_TX_VOTE_CLOCK_ON: 297 qca->tx_vote = true; 298 qca->tx_votes_on++; 299 break; 300 301 case HCI_IBS_RX_VOTE_CLOCK_ON: 302 qca->rx_vote = true; 303 qca->rx_votes_on++; 304 break; 305 306 case HCI_IBS_TX_VOTE_CLOCK_OFF: 307 qca->tx_vote = false; 308 qca->tx_votes_off++; 309 break; 310 311 case HCI_IBS_RX_VOTE_CLOCK_OFF: 312 qca->rx_vote = false; 313 qca->rx_votes_off++; 314 break; 315 316 default: 317 BT_ERR("Voting irregularity"); 318 return; 319 } 320 321 new_vote = qca->rx_vote | qca->tx_vote; 322 323 if (new_vote != old_vote) { 324 if (new_vote) 325 __serial_clock_on(hu->tty); 326 else 327 __serial_clock_off(hu->tty); 328 329 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false", 330 vote ? "true" : "false"); 331 332 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif); 333 334 if (new_vote) { 335 qca->votes_on++; 336 qca->vote_off_ms += diff; 337 } else { 338 qca->votes_off++; 339 qca->vote_on_ms += diff; 340 } 341 qca->vote_last_jif = jiffies; 342 } 343 } 344 345 /* Builds and sends an HCI_IBS command packet. 346 * These are very simple packets with only 1 cmd byte. 347 */ 348 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu) 349 { 350 int err = 0; 351 struct sk_buff *skb = NULL; 352 struct qca_data *qca = hu->priv; 353 354 BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd); 355 356 skb = bt_skb_alloc(1, GFP_ATOMIC); 357 if (!skb) { 358 BT_ERR("Failed to allocate memory for HCI_IBS packet"); 359 return -ENOMEM; 360 } 361 362 /* Assign HCI_IBS type */ 363 skb_put_u8(skb, cmd); 364 365 skb_queue_tail(&qca->txq, skb); 366 367 return err; 368 } 369 370 static void qca_wq_awake_device(struct work_struct *work) 371 { 372 struct qca_data *qca = container_of(work, struct qca_data, 373 ws_awake_device); 374 struct hci_uart *hu = qca->hu; 375 unsigned long retrans_delay; 376 unsigned long flags; 377 378 BT_DBG("hu %p wq awake device", hu); 379 380 /* Vote for serial clock */ 381 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu); 382 383 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 384 385 /* Send wake indication to device */ 386 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) 387 BT_ERR("Failed to send WAKE to device"); 388 389 qca->ibs_sent_wakes++; 390 391 /* Start retransmit timer */ 392 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 393 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 394 395 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 396 397 /* Actually send the packets */ 398 hci_uart_tx_wakeup(hu); 399 } 400 401 static void qca_wq_awake_rx(struct work_struct *work) 402 { 403 struct qca_data *qca = container_of(work, struct qca_data, 404 ws_awake_rx); 405 struct hci_uart *hu = qca->hu; 406 unsigned long flags; 407 408 BT_DBG("hu %p wq awake rx", hu); 409 410 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu); 411 412 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 413 qca->rx_ibs_state = HCI_IBS_RX_AWAKE; 414 415 /* Always acknowledge device wake up, 416 * sending IBS message doesn't count as TX ON. 417 */ 418 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) 419 BT_ERR("Failed to acknowledge device wake up"); 420 421 qca->ibs_sent_wacks++; 422 423 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 424 425 /* Actually send the packets */ 426 hci_uart_tx_wakeup(hu); 427 } 428 429 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work) 430 { 431 struct qca_data *qca = container_of(work, struct qca_data, 432 ws_rx_vote_off); 433 struct hci_uart *hu = qca->hu; 434 435 BT_DBG("hu %p rx clock vote off", hu); 436 437 serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu); 438 } 439 440 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work) 441 { 442 struct qca_data *qca = container_of(work, struct qca_data, 443 ws_tx_vote_off); 444 struct hci_uart *hu = qca->hu; 445 446 BT_DBG("hu %p tx clock vote off", hu); 447 448 /* Run HCI tx handling unlocked */ 449 hci_uart_tx_wakeup(hu); 450 451 /* Now that message queued to tty driver, vote for tty clocks off. 452 * It is up to the tty driver to pend the clocks off until tx done. 453 */ 454 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 455 } 456 457 static void hci_ibs_tx_idle_timeout(struct timer_list *t) 458 { 459 struct qca_data *qca = from_timer(qca, t, tx_idle_timer); 460 struct hci_uart *hu = qca->hu; 461 unsigned long flags; 462 463 BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state); 464 465 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 466 flags, SINGLE_DEPTH_NESTING); 467 468 switch (qca->tx_ibs_state) { 469 case HCI_IBS_TX_AWAKE: 470 /* TX_IDLE, go to SLEEP */ 471 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) { 472 BT_ERR("Failed to send SLEEP to device"); 473 break; 474 } 475 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 476 qca->ibs_sent_slps++; 477 queue_work(qca->workqueue, &qca->ws_tx_vote_off); 478 break; 479 480 case HCI_IBS_TX_ASLEEP: 481 case HCI_IBS_TX_WAKING: 482 default: 483 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 484 break; 485 } 486 487 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 488 } 489 490 static void hci_ibs_wake_retrans_timeout(struct timer_list *t) 491 { 492 struct qca_data *qca = from_timer(qca, t, wake_retrans_timer); 493 struct hci_uart *hu = qca->hu; 494 unsigned long flags, retrans_delay; 495 bool retransmit = false; 496 497 BT_DBG("hu %p wake retransmit timeout in %d state", 498 hu, qca->tx_ibs_state); 499 500 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 501 flags, SINGLE_DEPTH_NESTING); 502 503 /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */ 504 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 505 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 506 return; 507 } 508 509 switch (qca->tx_ibs_state) { 510 case HCI_IBS_TX_WAKING: 511 /* No WAKE_ACK, retransmit WAKE */ 512 retransmit = true; 513 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) { 514 BT_ERR("Failed to acknowledge device wake up"); 515 break; 516 } 517 qca->ibs_sent_wakes++; 518 retrans_delay = msecs_to_jiffies(qca->wake_retrans); 519 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay); 520 break; 521 522 case HCI_IBS_TX_ASLEEP: 523 case HCI_IBS_TX_AWAKE: 524 default: 525 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state); 526 break; 527 } 528 529 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 530 531 if (retransmit) 532 hci_uart_tx_wakeup(hu); 533 } 534 535 536 static void qca_controller_memdump_timeout(struct work_struct *work) 537 { 538 struct qca_data *qca = container_of(work, struct qca_data, 539 ctrl_memdump_timeout.work); 540 struct hci_uart *hu = qca->hu; 541 542 mutex_lock(&qca->hci_memdump_lock); 543 if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) { 544 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 545 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 546 /* Inject hw error event to reset the device 547 * and driver. 548 */ 549 hci_reset_dev(hu->hdev); 550 } 551 } 552 553 mutex_unlock(&qca->hci_memdump_lock); 554 } 555 556 557 /* Initialize protocol */ 558 static int qca_open(struct hci_uart *hu) 559 { 560 struct qca_serdev *qcadev; 561 struct qca_data *qca; 562 563 BT_DBG("hu %p qca_open", hu); 564 565 if (!hci_uart_has_flow_control(hu)) 566 return -EOPNOTSUPP; 567 568 qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL); 569 if (!qca) 570 return -ENOMEM; 571 572 skb_queue_head_init(&qca->txq); 573 skb_queue_head_init(&qca->tx_wait_q); 574 skb_queue_head_init(&qca->rx_memdump_q); 575 spin_lock_init(&qca->hci_ibs_lock); 576 mutex_init(&qca->hci_memdump_lock); 577 qca->workqueue = alloc_ordered_workqueue("qca_wq", 0); 578 if (!qca->workqueue) { 579 BT_ERR("QCA Workqueue not initialized properly"); 580 kfree(qca); 581 return -ENOMEM; 582 } 583 584 INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx); 585 INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device); 586 INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off); 587 INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off); 588 INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump); 589 INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout, 590 qca_controller_memdump_timeout); 591 init_waitqueue_head(&qca->suspend_wait_q); 592 593 qca->hu = hu; 594 init_completion(&qca->drop_ev_comp); 595 596 /* Assume we start with both sides asleep -- extra wakes OK */ 597 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 598 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 599 600 qca->vote_last_jif = jiffies; 601 602 hu->priv = qca; 603 604 if (hu->serdev) { 605 qcadev = serdev_device_get_drvdata(hu->serdev); 606 607 if (qca_is_wcn399x(qcadev->btsoc_type)) 608 hu->init_speed = qcadev->init_speed; 609 610 if (qcadev->oper_speed) 611 hu->oper_speed = qcadev->oper_speed; 612 } 613 614 timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0); 615 qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS; 616 617 timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0); 618 qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS; 619 620 BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u", 621 qca->tx_idle_delay, qca->wake_retrans); 622 623 return 0; 624 } 625 626 static void qca_debugfs_init(struct hci_dev *hdev) 627 { 628 struct hci_uart *hu = hci_get_drvdata(hdev); 629 struct qca_data *qca = hu->priv; 630 struct dentry *ibs_dir; 631 umode_t mode; 632 633 if (!hdev->debugfs) 634 return; 635 636 ibs_dir = debugfs_create_dir("ibs", hdev->debugfs); 637 638 /* read only */ 639 mode = 0444; 640 debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state); 641 debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state); 642 debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir, 643 &qca->ibs_sent_slps); 644 debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir, 645 &qca->ibs_sent_wakes); 646 debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir, 647 &qca->ibs_sent_wacks); 648 debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir, 649 &qca->ibs_recv_slps); 650 debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir, 651 &qca->ibs_recv_wakes); 652 debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir, 653 &qca->ibs_recv_wacks); 654 debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote); 655 debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on); 656 debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off); 657 debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote); 658 debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on); 659 debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off); 660 debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on); 661 debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off); 662 debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms); 663 debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms); 664 665 /* read/write */ 666 mode = 0644; 667 debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans); 668 debugfs_create_u32("tx_idle_delay", mode, ibs_dir, 669 &qca->tx_idle_delay); 670 } 671 672 /* Flush protocol data */ 673 static int qca_flush(struct hci_uart *hu) 674 { 675 struct qca_data *qca = hu->priv; 676 677 BT_DBG("hu %p qca flush", hu); 678 679 skb_queue_purge(&qca->tx_wait_q); 680 skb_queue_purge(&qca->txq); 681 682 return 0; 683 } 684 685 /* Close protocol */ 686 static int qca_close(struct hci_uart *hu) 687 { 688 struct qca_data *qca = hu->priv; 689 690 BT_DBG("hu %p qca close", hu); 691 692 serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu); 693 694 skb_queue_purge(&qca->tx_wait_q); 695 skb_queue_purge(&qca->txq); 696 skb_queue_purge(&qca->rx_memdump_q); 697 del_timer(&qca->tx_idle_timer); 698 del_timer(&qca->wake_retrans_timer); 699 destroy_workqueue(qca->workqueue); 700 qca->hu = NULL; 701 702 kfree_skb(qca->rx_skb); 703 704 hu->priv = NULL; 705 706 kfree(qca); 707 708 return 0; 709 } 710 711 /* Called upon a wake-up-indication from the device. 712 */ 713 static void device_want_to_wakeup(struct hci_uart *hu) 714 { 715 unsigned long flags; 716 struct qca_data *qca = hu->priv; 717 718 BT_DBG("hu %p want to wake up", hu); 719 720 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 721 722 qca->ibs_recv_wakes++; 723 724 /* Don't wake the rx up when suspending. */ 725 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 726 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 727 return; 728 } 729 730 switch (qca->rx_ibs_state) { 731 case HCI_IBS_RX_ASLEEP: 732 /* Make sure clock is on - we may have turned clock off since 733 * receiving the wake up indicator awake rx clock. 734 */ 735 queue_work(qca->workqueue, &qca->ws_awake_rx); 736 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 737 return; 738 739 case HCI_IBS_RX_AWAKE: 740 /* Always acknowledge device wake up, 741 * sending IBS message doesn't count as TX ON. 742 */ 743 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) { 744 BT_ERR("Failed to acknowledge device wake up"); 745 break; 746 } 747 qca->ibs_sent_wacks++; 748 break; 749 750 default: 751 /* Any other state is illegal */ 752 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d", 753 qca->rx_ibs_state); 754 break; 755 } 756 757 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 758 759 /* Actually send the packets */ 760 hci_uart_tx_wakeup(hu); 761 } 762 763 /* Called upon a sleep-indication from the device. 764 */ 765 static void device_want_to_sleep(struct hci_uart *hu) 766 { 767 unsigned long flags; 768 struct qca_data *qca = hu->priv; 769 770 BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state); 771 772 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 773 774 qca->ibs_recv_slps++; 775 776 switch (qca->rx_ibs_state) { 777 case HCI_IBS_RX_AWAKE: 778 /* Update state */ 779 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP; 780 /* Vote off rx clock under workqueue */ 781 queue_work(qca->workqueue, &qca->ws_rx_vote_off); 782 break; 783 784 case HCI_IBS_RX_ASLEEP: 785 break; 786 787 default: 788 /* Any other state is illegal */ 789 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d", 790 qca->rx_ibs_state); 791 break; 792 } 793 794 wake_up_interruptible(&qca->suspend_wait_q); 795 796 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 797 } 798 799 /* Called upon wake-up-acknowledgement from the device 800 */ 801 static void device_woke_up(struct hci_uart *hu) 802 { 803 unsigned long flags, idle_delay; 804 struct qca_data *qca = hu->priv; 805 struct sk_buff *skb = NULL; 806 807 BT_DBG("hu %p woke up", hu); 808 809 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 810 811 qca->ibs_recv_wacks++; 812 813 /* Don't react to the wake-up-acknowledgment when suspending. */ 814 if (test_bit(QCA_SUSPENDING, &qca->flags)) { 815 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 816 return; 817 } 818 819 switch (qca->tx_ibs_state) { 820 case HCI_IBS_TX_AWAKE: 821 /* Expect one if we send 2 WAKEs */ 822 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d", 823 qca->tx_ibs_state); 824 break; 825 826 case HCI_IBS_TX_WAKING: 827 /* Send pending packets */ 828 while ((skb = skb_dequeue(&qca->tx_wait_q))) 829 skb_queue_tail(&qca->txq, skb); 830 831 /* Switch timers and change state to HCI_IBS_TX_AWAKE */ 832 del_timer(&qca->wake_retrans_timer); 833 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 834 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 835 qca->tx_ibs_state = HCI_IBS_TX_AWAKE; 836 break; 837 838 case HCI_IBS_TX_ASLEEP: 839 default: 840 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d", 841 qca->tx_ibs_state); 842 break; 843 } 844 845 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 846 847 /* Actually send the packets */ 848 hci_uart_tx_wakeup(hu); 849 } 850 851 /* Enqueue frame for transmittion (padding, crc, etc) may be called from 852 * two simultaneous tasklets. 853 */ 854 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb) 855 { 856 unsigned long flags = 0, idle_delay; 857 struct qca_data *qca = hu->priv; 858 859 BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb, 860 qca->tx_ibs_state); 861 862 if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 863 /* As SSR is in progress, ignore the packets */ 864 bt_dev_dbg(hu->hdev, "SSR is in progress"); 865 kfree_skb(skb); 866 return 0; 867 } 868 869 /* Prepend skb with frame type */ 870 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); 871 872 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 873 874 /* Don't go to sleep in middle of patch download or 875 * Out-Of-Band(GPIOs control) sleep is selected. 876 * Don't wake the device up when suspending. 877 */ 878 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 879 test_bit(QCA_SUSPENDING, &qca->flags)) { 880 skb_queue_tail(&qca->txq, skb); 881 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 882 return 0; 883 } 884 885 /* Act according to current state */ 886 switch (qca->tx_ibs_state) { 887 case HCI_IBS_TX_AWAKE: 888 BT_DBG("Device awake, sending normally"); 889 skb_queue_tail(&qca->txq, skb); 890 idle_delay = msecs_to_jiffies(qca->tx_idle_delay); 891 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay); 892 break; 893 894 case HCI_IBS_TX_ASLEEP: 895 BT_DBG("Device asleep, waking up and queueing packet"); 896 /* Save packet for later */ 897 skb_queue_tail(&qca->tx_wait_q, skb); 898 899 qca->tx_ibs_state = HCI_IBS_TX_WAKING; 900 /* Schedule a work queue to wake up device */ 901 queue_work(qca->workqueue, &qca->ws_awake_device); 902 break; 903 904 case HCI_IBS_TX_WAKING: 905 BT_DBG("Device waking up, queueing packet"); 906 /* Transient state; just keep packet for later */ 907 skb_queue_tail(&qca->tx_wait_q, skb); 908 break; 909 910 default: 911 BT_ERR("Illegal tx state: %d (losing packet)", 912 qca->tx_ibs_state); 913 kfree_skb(skb); 914 break; 915 } 916 917 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 918 919 return 0; 920 } 921 922 static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb) 923 { 924 struct hci_uart *hu = hci_get_drvdata(hdev); 925 926 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND); 927 928 device_want_to_sleep(hu); 929 930 kfree_skb(skb); 931 return 0; 932 } 933 934 static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb) 935 { 936 struct hci_uart *hu = hci_get_drvdata(hdev); 937 938 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND); 939 940 device_want_to_wakeup(hu); 941 942 kfree_skb(skb); 943 return 0; 944 } 945 946 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb) 947 { 948 struct hci_uart *hu = hci_get_drvdata(hdev); 949 950 BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK); 951 952 device_woke_up(hu); 953 954 kfree_skb(skb); 955 return 0; 956 } 957 958 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb) 959 { 960 /* We receive debug logs from chip as an ACL packets. 961 * Instead of sending the data to ACL to decode the 962 * received data, we are pushing them to the above layers 963 * as a diagnostic packet. 964 */ 965 if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE) 966 return hci_recv_diag(hdev, skb); 967 968 return hci_recv_frame(hdev, skb); 969 } 970 971 static void qca_controller_memdump(struct work_struct *work) 972 { 973 struct qca_data *qca = container_of(work, struct qca_data, 974 ctrl_memdump_evt); 975 struct hci_uart *hu = qca->hu; 976 struct sk_buff *skb; 977 struct qca_memdump_event_hdr *cmd_hdr; 978 struct qca_memdump_data *qca_memdump = qca->qca_memdump; 979 struct qca_dump_size *dump; 980 char *memdump_buf; 981 char nullBuff[QCA_DUMP_PACKET_SIZE] = { 0 }; 982 u16 seq_no; 983 u32 dump_size; 984 u32 rx_size; 985 enum qca_btsoc_type soc_type = qca_soc_type(hu); 986 987 while ((skb = skb_dequeue(&qca->rx_memdump_q))) { 988 989 mutex_lock(&qca->hci_memdump_lock); 990 /* Skip processing the received packets if timeout detected 991 * or memdump collection completed. 992 */ 993 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 994 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 995 mutex_unlock(&qca->hci_memdump_lock); 996 return; 997 } 998 999 if (!qca_memdump) { 1000 qca_memdump = kzalloc(sizeof(struct qca_memdump_data), 1001 GFP_ATOMIC); 1002 if (!qca_memdump) { 1003 mutex_unlock(&qca->hci_memdump_lock); 1004 return; 1005 } 1006 1007 qca->qca_memdump = qca_memdump; 1008 } 1009 1010 qca->memdump_state = QCA_MEMDUMP_COLLECTING; 1011 cmd_hdr = (void *) skb->data; 1012 seq_no = __le16_to_cpu(cmd_hdr->seq_no); 1013 skb_pull(skb, sizeof(struct qca_memdump_event_hdr)); 1014 1015 if (!seq_no) { 1016 1017 /* This is the first frame of memdump packet from 1018 * the controller, Disable IBS to recevie dump 1019 * with out any interruption, ideally time required for 1020 * the controller to send the dump is 8 seconds. let us 1021 * start timer to handle this asynchronous activity. 1022 */ 1023 set_bit(QCA_IBS_DISABLED, &qca->flags); 1024 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1025 dump = (void *) skb->data; 1026 dump_size = __le32_to_cpu(dump->dump_size); 1027 if (!(dump_size)) { 1028 bt_dev_err(hu->hdev, "Rx invalid memdump size"); 1029 kfree(qca_memdump); 1030 kfree_skb(skb); 1031 qca->qca_memdump = NULL; 1032 mutex_unlock(&qca->hci_memdump_lock); 1033 return; 1034 } 1035 1036 bt_dev_info(hu->hdev, "QCA collecting dump of size:%u", 1037 dump_size); 1038 queue_delayed_work(qca->workqueue, 1039 &qca->ctrl_memdump_timeout, 1040 msecs_to_jiffies(MEMDUMP_TIMEOUT_MS) 1041 ); 1042 1043 skb_pull(skb, sizeof(dump_size)); 1044 memdump_buf = vmalloc(dump_size); 1045 qca_memdump->ram_dump_size = dump_size; 1046 qca_memdump->memdump_buf_head = memdump_buf; 1047 qca_memdump->memdump_buf_tail = memdump_buf; 1048 } 1049 1050 memdump_buf = qca_memdump->memdump_buf_tail; 1051 1052 /* If sequence no 0 is missed then there is no point in 1053 * accepting the other sequences. 1054 */ 1055 if (!memdump_buf) { 1056 bt_dev_err(hu->hdev, "QCA: Discarding other packets"); 1057 kfree(qca_memdump); 1058 kfree_skb(skb); 1059 qca->qca_memdump = NULL; 1060 mutex_unlock(&qca->hci_memdump_lock); 1061 return; 1062 } 1063 1064 /* There could be chance of missing some packets from 1065 * the controller. In such cases let us store the dummy 1066 * packets in the buffer. 1067 */ 1068 /* For QCA6390, controller does not lost packets but 1069 * sequence number field of packet sometimes has error 1070 * bits, so skip this checking for missing packet. 1071 */ 1072 while ((seq_no > qca_memdump->current_seq_no + 1) && 1073 (soc_type != QCA_QCA6390) && 1074 seq_no != QCA_LAST_SEQUENCE_NUM) { 1075 bt_dev_err(hu->hdev, "QCA controller missed packet:%d", 1076 qca_memdump->current_seq_no); 1077 rx_size = qca_memdump->received_dump; 1078 rx_size += QCA_DUMP_PACKET_SIZE; 1079 if (rx_size > qca_memdump->ram_dump_size) { 1080 bt_dev_err(hu->hdev, 1081 "QCA memdump received %d, no space for missed packet", 1082 qca_memdump->received_dump); 1083 break; 1084 } 1085 memcpy(memdump_buf, nullBuff, QCA_DUMP_PACKET_SIZE); 1086 memdump_buf = memdump_buf + QCA_DUMP_PACKET_SIZE; 1087 qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE; 1088 qca_memdump->current_seq_no++; 1089 } 1090 1091 rx_size = qca_memdump->received_dump + skb->len; 1092 if (rx_size <= qca_memdump->ram_dump_size) { 1093 if ((seq_no != QCA_LAST_SEQUENCE_NUM) && 1094 (seq_no != qca_memdump->current_seq_no)) 1095 bt_dev_err(hu->hdev, 1096 "QCA memdump unexpected packet %d", 1097 seq_no); 1098 bt_dev_dbg(hu->hdev, 1099 "QCA memdump packet %d with length %d", 1100 seq_no, skb->len); 1101 memcpy(memdump_buf, (unsigned char *)skb->data, 1102 skb->len); 1103 memdump_buf = memdump_buf + skb->len; 1104 qca_memdump->memdump_buf_tail = memdump_buf; 1105 qca_memdump->current_seq_no = seq_no + 1; 1106 qca_memdump->received_dump += skb->len; 1107 } else { 1108 bt_dev_err(hu->hdev, 1109 "QCA memdump received %d, no space for packet %d", 1110 qca_memdump->received_dump, seq_no); 1111 } 1112 qca->qca_memdump = qca_memdump; 1113 kfree_skb(skb); 1114 if (seq_no == QCA_LAST_SEQUENCE_NUM) { 1115 bt_dev_info(hu->hdev, 1116 "QCA memdump Done, received %d, total %d", 1117 qca_memdump->received_dump, 1118 qca_memdump->ram_dump_size); 1119 memdump_buf = qca_memdump->memdump_buf_head; 1120 dev_coredumpv(&hu->serdev->dev, memdump_buf, 1121 qca_memdump->received_dump, GFP_KERNEL); 1122 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1123 kfree(qca->qca_memdump); 1124 qca->qca_memdump = NULL; 1125 qca->memdump_state = QCA_MEMDUMP_COLLECTED; 1126 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1127 } 1128 1129 mutex_unlock(&qca->hci_memdump_lock); 1130 } 1131 1132 } 1133 1134 static int qca_controller_memdump_event(struct hci_dev *hdev, 1135 struct sk_buff *skb) 1136 { 1137 struct hci_uart *hu = hci_get_drvdata(hdev); 1138 struct qca_data *qca = hu->priv; 1139 1140 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1141 skb_queue_tail(&qca->rx_memdump_q, skb); 1142 queue_work(qca->workqueue, &qca->ctrl_memdump_evt); 1143 1144 return 0; 1145 } 1146 1147 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb) 1148 { 1149 struct hci_uart *hu = hci_get_drvdata(hdev); 1150 struct qca_data *qca = hu->priv; 1151 1152 if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) { 1153 struct hci_event_hdr *hdr = (void *)skb->data; 1154 1155 /* For the WCN3990 the vendor command for a baudrate change 1156 * isn't sent as synchronous HCI command, because the 1157 * controller sends the corresponding vendor event with the 1158 * new baudrate. The event is received and properly decoded 1159 * after changing the baudrate of the host port. It needs to 1160 * be dropped, otherwise it can be misinterpreted as 1161 * response to a later firmware download command (also a 1162 * vendor command). 1163 */ 1164 1165 if (hdr->evt == HCI_EV_VENDOR) 1166 complete(&qca->drop_ev_comp); 1167 1168 kfree_skb(skb); 1169 1170 return 0; 1171 } 1172 /* We receive chip memory dump as an event packet, With a dedicated 1173 * handler followed by a hardware error event. When this event is 1174 * received we store dump into a file before closing hci. This 1175 * dump will help in triaging the issues. 1176 */ 1177 if ((skb->data[0] == HCI_VENDOR_PKT) && 1178 (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE)) 1179 return qca_controller_memdump_event(hdev, skb); 1180 1181 return hci_recv_frame(hdev, skb); 1182 } 1183 1184 #define QCA_IBS_SLEEP_IND_EVENT \ 1185 .type = HCI_IBS_SLEEP_IND, \ 1186 .hlen = 0, \ 1187 .loff = 0, \ 1188 .lsize = 0, \ 1189 .maxlen = HCI_MAX_IBS_SIZE 1190 1191 #define QCA_IBS_WAKE_IND_EVENT \ 1192 .type = HCI_IBS_WAKE_IND, \ 1193 .hlen = 0, \ 1194 .loff = 0, \ 1195 .lsize = 0, \ 1196 .maxlen = HCI_MAX_IBS_SIZE 1197 1198 #define QCA_IBS_WAKE_ACK_EVENT \ 1199 .type = HCI_IBS_WAKE_ACK, \ 1200 .hlen = 0, \ 1201 .loff = 0, \ 1202 .lsize = 0, \ 1203 .maxlen = HCI_MAX_IBS_SIZE 1204 1205 static const struct h4_recv_pkt qca_recv_pkts[] = { 1206 { H4_RECV_ACL, .recv = qca_recv_acl_data }, 1207 { H4_RECV_SCO, .recv = hci_recv_frame }, 1208 { H4_RECV_EVENT, .recv = qca_recv_event }, 1209 { QCA_IBS_WAKE_IND_EVENT, .recv = qca_ibs_wake_ind }, 1210 { QCA_IBS_WAKE_ACK_EVENT, .recv = qca_ibs_wake_ack }, 1211 { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind }, 1212 }; 1213 1214 static int qca_recv(struct hci_uart *hu, const void *data, int count) 1215 { 1216 struct qca_data *qca = hu->priv; 1217 1218 if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) 1219 return -EUNATCH; 1220 1221 qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count, 1222 qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts)); 1223 if (IS_ERR(qca->rx_skb)) { 1224 int err = PTR_ERR(qca->rx_skb); 1225 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); 1226 qca->rx_skb = NULL; 1227 return err; 1228 } 1229 1230 return count; 1231 } 1232 1233 static struct sk_buff *qca_dequeue(struct hci_uart *hu) 1234 { 1235 struct qca_data *qca = hu->priv; 1236 1237 return skb_dequeue(&qca->txq); 1238 } 1239 1240 static uint8_t qca_get_baudrate_value(int speed) 1241 { 1242 switch (speed) { 1243 case 9600: 1244 return QCA_BAUDRATE_9600; 1245 case 19200: 1246 return QCA_BAUDRATE_19200; 1247 case 38400: 1248 return QCA_BAUDRATE_38400; 1249 case 57600: 1250 return QCA_BAUDRATE_57600; 1251 case 115200: 1252 return QCA_BAUDRATE_115200; 1253 case 230400: 1254 return QCA_BAUDRATE_230400; 1255 case 460800: 1256 return QCA_BAUDRATE_460800; 1257 case 500000: 1258 return QCA_BAUDRATE_500000; 1259 case 921600: 1260 return QCA_BAUDRATE_921600; 1261 case 1000000: 1262 return QCA_BAUDRATE_1000000; 1263 case 2000000: 1264 return QCA_BAUDRATE_2000000; 1265 case 3000000: 1266 return QCA_BAUDRATE_3000000; 1267 case 3200000: 1268 return QCA_BAUDRATE_3200000; 1269 case 3500000: 1270 return QCA_BAUDRATE_3500000; 1271 default: 1272 return QCA_BAUDRATE_115200; 1273 } 1274 } 1275 1276 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate) 1277 { 1278 struct hci_uart *hu = hci_get_drvdata(hdev); 1279 struct qca_data *qca = hu->priv; 1280 struct sk_buff *skb; 1281 u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 }; 1282 1283 if (baudrate > QCA_BAUDRATE_3200000) 1284 return -EINVAL; 1285 1286 cmd[4] = baudrate; 1287 1288 skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL); 1289 if (!skb) { 1290 bt_dev_err(hdev, "Failed to allocate baudrate packet"); 1291 return -ENOMEM; 1292 } 1293 1294 /* Assign commands to change baudrate and packet type. */ 1295 skb_put_data(skb, cmd, sizeof(cmd)); 1296 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1297 1298 skb_queue_tail(&qca->txq, skb); 1299 hci_uart_tx_wakeup(hu); 1300 1301 /* Wait for the baudrate change request to be sent */ 1302 1303 while (!skb_queue_empty(&qca->txq)) 1304 usleep_range(100, 200); 1305 1306 if (hu->serdev) 1307 serdev_device_wait_until_sent(hu->serdev, 1308 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); 1309 1310 /* Give the controller time to process the request */ 1311 if (qca_is_wcn399x(qca_soc_type(hu))) 1312 usleep_range(1000, 10000); 1313 else 1314 msleep(300); 1315 1316 return 0; 1317 } 1318 1319 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) 1320 { 1321 if (hu->serdev) 1322 serdev_device_set_baudrate(hu->serdev, speed); 1323 else 1324 hci_uart_set_baudrate(hu, speed); 1325 } 1326 1327 static int qca_send_power_pulse(struct hci_uart *hu, bool on) 1328 { 1329 int ret; 1330 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); 1331 u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE; 1332 1333 /* These power pulses are single byte command which are sent 1334 * at required baudrate to wcn3990. On wcn3990, we have an external 1335 * circuit at Tx pin which decodes the pulse sent at specific baudrate. 1336 * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT 1337 * and also we use the same power inputs to turn on and off for 1338 * Wi-Fi/BT. Powering up the power sources will not enable BT, until 1339 * we send a power on pulse at 115200 bps. This algorithm will help to 1340 * save power. Disabling hardware flow control is mandatory while 1341 * sending power pulses to SoC. 1342 */ 1343 bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd); 1344 1345 serdev_device_write_flush(hu->serdev); 1346 hci_uart_set_flow_control(hu, true); 1347 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 1348 if (ret < 0) { 1349 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd); 1350 return ret; 1351 } 1352 1353 serdev_device_wait_until_sent(hu->serdev, timeout); 1354 hci_uart_set_flow_control(hu, false); 1355 1356 /* Give to controller time to boot/shutdown */ 1357 if (on) 1358 msleep(100); 1359 else 1360 usleep_range(1000, 10000); 1361 1362 return 0; 1363 } 1364 1365 static unsigned int qca_get_speed(struct hci_uart *hu, 1366 enum qca_speed_type speed_type) 1367 { 1368 unsigned int speed = 0; 1369 1370 if (speed_type == QCA_INIT_SPEED) { 1371 if (hu->init_speed) 1372 speed = hu->init_speed; 1373 else if (hu->proto->init_speed) 1374 speed = hu->proto->init_speed; 1375 } else { 1376 if (hu->oper_speed) 1377 speed = hu->oper_speed; 1378 else if (hu->proto->oper_speed) 1379 speed = hu->proto->oper_speed; 1380 } 1381 1382 return speed; 1383 } 1384 1385 static int qca_check_speeds(struct hci_uart *hu) 1386 { 1387 if (qca_is_wcn399x(qca_soc_type(hu))) { 1388 if (!qca_get_speed(hu, QCA_INIT_SPEED) && 1389 !qca_get_speed(hu, QCA_OPER_SPEED)) 1390 return -EINVAL; 1391 } else { 1392 if (!qca_get_speed(hu, QCA_INIT_SPEED) || 1393 !qca_get_speed(hu, QCA_OPER_SPEED)) 1394 return -EINVAL; 1395 } 1396 1397 return 0; 1398 } 1399 1400 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type) 1401 { 1402 unsigned int speed, qca_baudrate; 1403 struct qca_data *qca = hu->priv; 1404 int ret = 0; 1405 1406 if (speed_type == QCA_INIT_SPEED) { 1407 speed = qca_get_speed(hu, QCA_INIT_SPEED); 1408 if (speed) 1409 host_set_baudrate(hu, speed); 1410 } else { 1411 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1412 1413 speed = qca_get_speed(hu, QCA_OPER_SPEED); 1414 if (!speed) 1415 return 0; 1416 1417 /* Disable flow control for wcn3990 to deassert RTS while 1418 * changing the baudrate of chip and host. 1419 */ 1420 if (qca_is_wcn399x(soc_type)) 1421 hci_uart_set_flow_control(hu, true); 1422 1423 if (soc_type == QCA_WCN3990) { 1424 reinit_completion(&qca->drop_ev_comp); 1425 set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1426 } 1427 1428 qca_baudrate = qca_get_baudrate_value(speed); 1429 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed); 1430 ret = qca_set_baudrate(hu->hdev, qca_baudrate); 1431 if (ret) 1432 goto error; 1433 1434 host_set_baudrate(hu, speed); 1435 1436 error: 1437 if (qca_is_wcn399x(soc_type)) 1438 hci_uart_set_flow_control(hu, false); 1439 1440 if (soc_type == QCA_WCN3990) { 1441 /* Wait for the controller to send the vendor event 1442 * for the baudrate change command. 1443 */ 1444 if (!wait_for_completion_timeout(&qca->drop_ev_comp, 1445 msecs_to_jiffies(100))) { 1446 bt_dev_err(hu->hdev, 1447 "Failed to change controller baudrate\n"); 1448 ret = -ETIMEDOUT; 1449 } 1450 1451 clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags); 1452 } 1453 } 1454 1455 return ret; 1456 } 1457 1458 static int qca_send_crashbuffer(struct hci_uart *hu) 1459 { 1460 struct qca_data *qca = hu->priv; 1461 struct sk_buff *skb; 1462 1463 skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL); 1464 if (!skb) { 1465 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet"); 1466 return -ENOMEM; 1467 } 1468 1469 /* We forcefully crash the controller, by sending 0xfb byte for 1470 * 1024 times. We also might have chance of losing data, To be 1471 * on safer side we send 1096 bytes to the SoC. 1472 */ 1473 memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE, 1474 QCA_CRASHBYTE_PACKET_LEN); 1475 hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; 1476 bt_dev_info(hu->hdev, "crash the soc to collect controller dump"); 1477 skb_queue_tail(&qca->txq, skb); 1478 hci_uart_tx_wakeup(hu); 1479 1480 return 0; 1481 } 1482 1483 static void qca_wait_for_dump_collection(struct hci_dev *hdev) 1484 { 1485 struct hci_uart *hu = hci_get_drvdata(hdev); 1486 struct qca_data *qca = hu->priv; 1487 1488 wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION, 1489 TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS); 1490 1491 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1492 } 1493 1494 static void qca_hw_error(struct hci_dev *hdev, u8 code) 1495 { 1496 struct hci_uart *hu = hci_get_drvdata(hdev); 1497 struct qca_data *qca = hu->priv; 1498 1499 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1500 set_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1501 bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state); 1502 1503 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1504 /* If hardware error event received for other than QCA 1505 * soc memory dump event, then we need to crash the SOC 1506 * and wait here for 8 seconds to get the dump packets. 1507 * This will block main thread to be on hold until we 1508 * collect dump. 1509 */ 1510 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1511 qca_send_crashbuffer(hu); 1512 qca_wait_for_dump_collection(hdev); 1513 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1514 /* Let us wait here until memory dump collected or 1515 * memory dump timer expired. 1516 */ 1517 bt_dev_info(hdev, "waiting for dump to complete"); 1518 qca_wait_for_dump_collection(hdev); 1519 } 1520 1521 mutex_lock(&qca->hci_memdump_lock); 1522 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1523 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout"); 1524 if (qca->qca_memdump) { 1525 vfree(qca->qca_memdump->memdump_buf_head); 1526 kfree(qca->qca_memdump); 1527 qca->qca_memdump = NULL; 1528 } 1529 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1530 cancel_delayed_work(&qca->ctrl_memdump_timeout); 1531 } 1532 mutex_unlock(&qca->hci_memdump_lock); 1533 1534 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT || 1535 qca->memdump_state == QCA_MEMDUMP_COLLECTED) { 1536 cancel_work_sync(&qca->ctrl_memdump_evt); 1537 skb_queue_purge(&qca->rx_memdump_q); 1538 } 1539 1540 clear_bit(QCA_HW_ERROR_EVENT, &qca->flags); 1541 } 1542 1543 static void qca_cmd_timeout(struct hci_dev *hdev) 1544 { 1545 struct hci_uart *hu = hci_get_drvdata(hdev); 1546 struct qca_data *qca = hu->priv; 1547 1548 set_bit(QCA_SSR_TRIGGERED, &qca->flags); 1549 if (qca->memdump_state == QCA_MEMDUMP_IDLE) { 1550 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags); 1551 qca_send_crashbuffer(hu); 1552 qca_wait_for_dump_collection(hdev); 1553 } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) { 1554 /* Let us wait here until memory dump collected or 1555 * memory dump timer expired. 1556 */ 1557 bt_dev_info(hdev, "waiting for dump to complete"); 1558 qca_wait_for_dump_collection(hdev); 1559 } 1560 1561 mutex_lock(&qca->hci_memdump_lock); 1562 if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) { 1563 qca->memdump_state = QCA_MEMDUMP_TIMEOUT; 1564 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) { 1565 /* Inject hw error event to reset the device 1566 * and driver. 1567 */ 1568 hci_reset_dev(hu->hdev); 1569 } 1570 } 1571 mutex_unlock(&qca->hci_memdump_lock); 1572 } 1573 1574 static bool qca_prevent_wake(struct hci_dev *hdev) 1575 { 1576 struct hci_uart *hu = hci_get_drvdata(hdev); 1577 bool wakeup; 1578 1579 /* UART driver handles the interrupt from BT SoC.So we need to use 1580 * device handle of UART driver to get the status of device may wakeup. 1581 */ 1582 wakeup = device_may_wakeup(hu->serdev->ctrl->dev.parent); 1583 bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup); 1584 1585 return !wakeup; 1586 } 1587 1588 static int qca_wcn3990_init(struct hci_uart *hu) 1589 { 1590 struct qca_serdev *qcadev; 1591 int ret; 1592 1593 /* Check for vregs status, may be hci down has turned 1594 * off the voltage regulator. 1595 */ 1596 qcadev = serdev_device_get_drvdata(hu->serdev); 1597 if (!qcadev->bt_power->vregs_on) { 1598 serdev_device_close(hu->serdev); 1599 ret = qca_regulator_enable(qcadev); 1600 if (ret) 1601 return ret; 1602 1603 ret = serdev_device_open(hu->serdev); 1604 if (ret) { 1605 bt_dev_err(hu->hdev, "failed to open port"); 1606 return ret; 1607 } 1608 } 1609 1610 /* Forcefully enable wcn3990 to enter in to boot mode. */ 1611 host_set_baudrate(hu, 2400); 1612 ret = qca_send_power_pulse(hu, false); 1613 if (ret) 1614 return ret; 1615 1616 qca_set_speed(hu, QCA_INIT_SPEED); 1617 ret = qca_send_power_pulse(hu, true); 1618 if (ret) 1619 return ret; 1620 1621 /* Now the device is in ready state to communicate with host. 1622 * To sync host with device we need to reopen port. 1623 * Without this, we will have RTS and CTS synchronization 1624 * issues. 1625 */ 1626 serdev_device_close(hu->serdev); 1627 ret = serdev_device_open(hu->serdev); 1628 if (ret) { 1629 bt_dev_err(hu->hdev, "failed to open port"); 1630 return ret; 1631 } 1632 1633 hci_uart_set_flow_control(hu, false); 1634 1635 return 0; 1636 } 1637 1638 static int qca_power_on(struct hci_dev *hdev) 1639 { 1640 struct hci_uart *hu = hci_get_drvdata(hdev); 1641 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1642 struct qca_serdev *qcadev; 1643 struct qca_data *qca = hu->priv; 1644 int ret = 0; 1645 1646 /* Non-serdev device usually is powered by external power 1647 * and don't need additional action in driver for power on 1648 */ 1649 if (!hu->serdev) 1650 return 0; 1651 1652 if (qca_is_wcn399x(soc_type)) { 1653 ret = qca_wcn3990_init(hu); 1654 } else { 1655 qcadev = serdev_device_get_drvdata(hu->serdev); 1656 if (qcadev->bt_en) { 1657 gpiod_set_value_cansleep(qcadev->bt_en, 1); 1658 /* Controller needs time to bootup. */ 1659 msleep(150); 1660 } 1661 } 1662 1663 clear_bit(QCA_BT_OFF, &qca->flags); 1664 return ret; 1665 } 1666 1667 static int qca_setup(struct hci_uart *hu) 1668 { 1669 struct hci_dev *hdev = hu->hdev; 1670 struct qca_data *qca = hu->priv; 1671 unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200; 1672 unsigned int retries = 0; 1673 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1674 const char *firmware_name = qca_get_firmware_name(hu); 1675 int ret; 1676 struct qca_btsoc_version ver; 1677 1678 ret = qca_check_speeds(hu); 1679 if (ret) 1680 return ret; 1681 1682 clear_bit(QCA_ROM_FW, &qca->flags); 1683 /* Patch downloading has to be done without IBS mode */ 1684 set_bit(QCA_IBS_DISABLED, &qca->flags); 1685 1686 /* Enable controller to do both LE scan and BR/EDR inquiry 1687 * simultaneously. 1688 */ 1689 set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); 1690 1691 bt_dev_info(hdev, "setting up %s", 1692 qca_is_wcn399x(soc_type) ? "wcn399x" : "ROME/QCA6390"); 1693 1694 qca->memdump_state = QCA_MEMDUMP_IDLE; 1695 1696 retry: 1697 ret = qca_power_on(hdev); 1698 if (ret) 1699 goto out; 1700 1701 clear_bit(QCA_SSR_TRIGGERED, &qca->flags); 1702 1703 if (qca_is_wcn399x(soc_type)) { 1704 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks); 1705 1706 ret = qca_read_soc_version(hdev, &ver, soc_type); 1707 if (ret) 1708 goto out; 1709 } else { 1710 qca_set_speed(hu, QCA_INIT_SPEED); 1711 } 1712 1713 /* Setup user speed if needed */ 1714 speed = qca_get_speed(hu, QCA_OPER_SPEED); 1715 if (speed) { 1716 ret = qca_set_speed(hu, QCA_OPER_SPEED); 1717 if (ret) 1718 goto out; 1719 1720 qca_baudrate = qca_get_baudrate_value(speed); 1721 } 1722 1723 if (!qca_is_wcn399x(soc_type)) { 1724 /* Get QCA version information */ 1725 ret = qca_read_soc_version(hdev, &ver, soc_type); 1726 if (ret) 1727 goto out; 1728 } 1729 1730 /* Setup patch / NVM configurations */ 1731 ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver, 1732 firmware_name); 1733 if (!ret) { 1734 clear_bit(QCA_IBS_DISABLED, &qca->flags); 1735 qca_debugfs_init(hdev); 1736 hu->hdev->hw_error = qca_hw_error; 1737 hu->hdev->cmd_timeout = qca_cmd_timeout; 1738 hu->hdev->prevent_wake = qca_prevent_wake; 1739 } else if (ret == -ENOENT) { 1740 /* No patch/nvm-config found, run with original fw/config */ 1741 set_bit(QCA_ROM_FW, &qca->flags); 1742 ret = 0; 1743 } else if (ret == -EAGAIN) { 1744 /* 1745 * Userspace firmware loader will return -EAGAIN in case no 1746 * patch/nvm-config is found, so run with original fw/config. 1747 */ 1748 set_bit(QCA_ROM_FW, &qca->flags); 1749 ret = 0; 1750 } 1751 1752 out: 1753 if (ret && retries < MAX_INIT_RETRIES) { 1754 bt_dev_warn(hdev, "Retry BT power ON:%d", retries); 1755 qca_power_shutdown(hu); 1756 if (hu->serdev) { 1757 serdev_device_close(hu->serdev); 1758 ret = serdev_device_open(hu->serdev); 1759 if (ret) { 1760 bt_dev_err(hdev, "failed to open port"); 1761 return ret; 1762 } 1763 } 1764 retries++; 1765 goto retry; 1766 } 1767 1768 /* Setup bdaddr */ 1769 if (soc_type == QCA_ROME) 1770 hu->hdev->set_bdaddr = qca_set_bdaddr_rome; 1771 else 1772 hu->hdev->set_bdaddr = qca_set_bdaddr; 1773 1774 return ret; 1775 } 1776 1777 static const struct hci_uart_proto qca_proto = { 1778 .id = HCI_UART_QCA, 1779 .name = "QCA", 1780 .manufacturer = 29, 1781 .init_speed = 115200, 1782 .oper_speed = 3000000, 1783 .open = qca_open, 1784 .close = qca_close, 1785 .flush = qca_flush, 1786 .setup = qca_setup, 1787 .recv = qca_recv, 1788 .enqueue = qca_enqueue, 1789 .dequeue = qca_dequeue, 1790 }; 1791 1792 static const struct qca_device_data qca_soc_data_wcn3990 = { 1793 .soc_type = QCA_WCN3990, 1794 .vregs = (struct qca_vreg []) { 1795 { "vddio", 15000 }, 1796 { "vddxo", 80000 }, 1797 { "vddrf", 300000 }, 1798 { "vddch0", 450000 }, 1799 }, 1800 .num_vregs = 4, 1801 }; 1802 1803 static const struct qca_device_data qca_soc_data_wcn3991 = { 1804 .soc_type = QCA_WCN3991, 1805 .vregs = (struct qca_vreg []) { 1806 { "vddio", 15000 }, 1807 { "vddxo", 80000 }, 1808 { "vddrf", 300000 }, 1809 { "vddch0", 450000 }, 1810 }, 1811 .num_vregs = 4, 1812 .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES, 1813 }; 1814 1815 static const struct qca_device_data qca_soc_data_wcn3998 = { 1816 .soc_type = QCA_WCN3998, 1817 .vregs = (struct qca_vreg []) { 1818 { "vddio", 10000 }, 1819 { "vddxo", 80000 }, 1820 { "vddrf", 300000 }, 1821 { "vddch0", 450000 }, 1822 }, 1823 .num_vregs = 4, 1824 }; 1825 1826 static const struct qca_device_data qca_soc_data_qca6390 = { 1827 .soc_type = QCA_QCA6390, 1828 .num_vregs = 0, 1829 }; 1830 1831 static void qca_power_shutdown(struct hci_uart *hu) 1832 { 1833 struct qca_serdev *qcadev; 1834 struct qca_data *qca = hu->priv; 1835 unsigned long flags; 1836 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1837 1838 qcadev = serdev_device_get_drvdata(hu->serdev); 1839 1840 /* From this point we go into power off state. But serial port is 1841 * still open, stop queueing the IBS data and flush all the buffered 1842 * data in skb's. 1843 */ 1844 spin_lock_irqsave(&qca->hci_ibs_lock, flags); 1845 set_bit(QCA_IBS_DISABLED, &qca->flags); 1846 qca_flush(hu); 1847 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 1848 1849 /* Non-serdev device usually is powered by external power 1850 * and don't need additional action in driver for power down 1851 */ 1852 if (!hu->serdev) 1853 return; 1854 1855 if (qca_is_wcn399x(soc_type)) { 1856 host_set_baudrate(hu, 2400); 1857 qca_send_power_pulse(hu, false); 1858 qca_regulator_disable(qcadev); 1859 } else if (qcadev->bt_en) { 1860 gpiod_set_value_cansleep(qcadev->bt_en, 0); 1861 } 1862 1863 set_bit(QCA_BT_OFF, &qca->flags); 1864 } 1865 1866 static int qca_power_off(struct hci_dev *hdev) 1867 { 1868 struct hci_uart *hu = hci_get_drvdata(hdev); 1869 struct qca_data *qca = hu->priv; 1870 enum qca_btsoc_type soc_type = qca_soc_type(hu); 1871 1872 hu->hdev->hw_error = NULL; 1873 hu->hdev->cmd_timeout = NULL; 1874 1875 /* Stop sending shutdown command if soc crashes. */ 1876 if (soc_type != QCA_ROME 1877 && qca->memdump_state == QCA_MEMDUMP_IDLE) { 1878 qca_send_pre_shutdown_cmd(hdev); 1879 usleep_range(8000, 10000); 1880 } 1881 1882 qca_power_shutdown(hu); 1883 return 0; 1884 } 1885 1886 static int qca_regulator_enable(struct qca_serdev *qcadev) 1887 { 1888 struct qca_power *power = qcadev->bt_power; 1889 int ret; 1890 1891 /* Already enabled */ 1892 if (power->vregs_on) 1893 return 0; 1894 1895 BT_DBG("enabling %d regulators)", power->num_vregs); 1896 1897 ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk); 1898 if (ret) 1899 return ret; 1900 1901 power->vregs_on = true; 1902 1903 ret = clk_prepare_enable(qcadev->susclk); 1904 if (ret) 1905 qca_regulator_disable(qcadev); 1906 1907 return ret; 1908 } 1909 1910 static void qca_regulator_disable(struct qca_serdev *qcadev) 1911 { 1912 struct qca_power *power; 1913 1914 if (!qcadev) 1915 return; 1916 1917 power = qcadev->bt_power; 1918 1919 /* Already disabled? */ 1920 if (!power->vregs_on) 1921 return; 1922 1923 regulator_bulk_disable(power->num_vregs, power->vreg_bulk); 1924 power->vregs_on = false; 1925 1926 clk_disable_unprepare(qcadev->susclk); 1927 } 1928 1929 static int qca_init_regulators(struct qca_power *qca, 1930 const struct qca_vreg *vregs, size_t num_vregs) 1931 { 1932 struct regulator_bulk_data *bulk; 1933 int ret; 1934 int i; 1935 1936 bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL); 1937 if (!bulk) 1938 return -ENOMEM; 1939 1940 for (i = 0; i < num_vregs; i++) 1941 bulk[i].supply = vregs[i].name; 1942 1943 ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk); 1944 if (ret < 0) 1945 return ret; 1946 1947 for (i = 0; i < num_vregs; i++) { 1948 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA); 1949 if (ret) 1950 return ret; 1951 } 1952 1953 qca->vreg_bulk = bulk; 1954 qca->num_vregs = num_vregs; 1955 1956 return 0; 1957 } 1958 1959 static int qca_serdev_probe(struct serdev_device *serdev) 1960 { 1961 struct qca_serdev *qcadev; 1962 struct hci_dev *hdev; 1963 const struct qca_device_data *data; 1964 int err; 1965 bool power_ctrl_enabled = true; 1966 1967 qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL); 1968 if (!qcadev) 1969 return -ENOMEM; 1970 1971 qcadev->serdev_hu.serdev = serdev; 1972 data = device_get_match_data(&serdev->dev); 1973 serdev_device_set_drvdata(serdev, qcadev); 1974 device_property_read_string(&serdev->dev, "firmware-name", 1975 &qcadev->firmware_name); 1976 device_property_read_u32(&serdev->dev, "max-speed", 1977 &qcadev->oper_speed); 1978 if (!qcadev->oper_speed) 1979 BT_DBG("UART will pick default operating speed"); 1980 1981 if (data && qca_is_wcn399x(data->soc_type)) { 1982 qcadev->btsoc_type = data->soc_type; 1983 qcadev->bt_power = devm_kzalloc(&serdev->dev, 1984 sizeof(struct qca_power), 1985 GFP_KERNEL); 1986 if (!qcadev->bt_power) 1987 return -ENOMEM; 1988 1989 qcadev->bt_power->dev = &serdev->dev; 1990 err = qca_init_regulators(qcadev->bt_power, data->vregs, 1991 data->num_vregs); 1992 if (err) { 1993 BT_ERR("Failed to init regulators:%d", err); 1994 return err; 1995 } 1996 1997 qcadev->bt_power->vregs_on = false; 1998 1999 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); 2000 if (IS_ERR(qcadev->susclk)) { 2001 dev_err(&serdev->dev, "failed to acquire clk\n"); 2002 return PTR_ERR(qcadev->susclk); 2003 } 2004 2005 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); 2006 if (err) { 2007 BT_ERR("wcn3990 serdev registration failed"); 2008 return err; 2009 } 2010 } else { 2011 if (data) 2012 qcadev->btsoc_type = data->soc_type; 2013 else 2014 qcadev->btsoc_type = QCA_ROME; 2015 2016 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", 2017 GPIOD_OUT_LOW); 2018 if (!qcadev->bt_en) { 2019 dev_warn(&serdev->dev, "failed to acquire enable gpio\n"); 2020 power_ctrl_enabled = false; 2021 } 2022 2023 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL); 2024 if (IS_ERR(qcadev->susclk)) { 2025 dev_warn(&serdev->dev, "failed to acquire clk\n"); 2026 return PTR_ERR(qcadev->susclk); 2027 } 2028 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ); 2029 if (err) 2030 return err; 2031 2032 err = clk_prepare_enable(qcadev->susclk); 2033 if (err) 2034 return err; 2035 2036 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto); 2037 if (err) { 2038 BT_ERR("Rome serdev registration failed"); 2039 clk_disable_unprepare(qcadev->susclk); 2040 return err; 2041 } 2042 } 2043 2044 hdev = qcadev->serdev_hu.hdev; 2045 2046 if (power_ctrl_enabled) { 2047 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); 2048 hdev->shutdown = qca_power_off; 2049 } 2050 2051 if (data) { 2052 /* Wideband speech support must be set per driver since it can't 2053 * be queried via hci. Same with the valid le states quirk. 2054 */ 2055 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH) 2056 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, 2057 &hdev->quirks); 2058 2059 if (data->capabilities & QCA_CAP_VALID_LE_STATES) 2060 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks); 2061 } 2062 2063 return 0; 2064 } 2065 2066 static void qca_serdev_remove(struct serdev_device *serdev) 2067 { 2068 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2069 struct qca_power *power = qcadev->bt_power; 2070 2071 if (qca_is_wcn399x(qcadev->btsoc_type) && power->vregs_on) 2072 qca_power_shutdown(&qcadev->serdev_hu); 2073 else if (qcadev->susclk) 2074 clk_disable_unprepare(qcadev->susclk); 2075 2076 hci_uart_unregister_device(&qcadev->serdev_hu); 2077 } 2078 2079 static void qca_serdev_shutdown(struct device *dev) 2080 { 2081 int ret; 2082 int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS); 2083 struct serdev_device *serdev = to_serdev_device(dev); 2084 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2085 const u8 ibs_wake_cmd[] = { 0xFD }; 2086 const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 }; 2087 2088 if (qcadev->btsoc_type == QCA_QCA6390) { 2089 serdev_device_write_flush(serdev); 2090 ret = serdev_device_write_buf(serdev, ibs_wake_cmd, 2091 sizeof(ibs_wake_cmd)); 2092 if (ret < 0) { 2093 BT_ERR("QCA send IBS_WAKE_IND error: %d", ret); 2094 return; 2095 } 2096 serdev_device_wait_until_sent(serdev, timeout); 2097 usleep_range(8000, 10000); 2098 2099 serdev_device_write_flush(serdev); 2100 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd, 2101 sizeof(edl_reset_soc_cmd)); 2102 if (ret < 0) { 2103 BT_ERR("QCA send EDL_RESET_REQ error: %d", ret); 2104 return; 2105 } 2106 serdev_device_wait_until_sent(serdev, timeout); 2107 usleep_range(8000, 10000); 2108 } 2109 } 2110 2111 static int __maybe_unused qca_suspend(struct device *dev) 2112 { 2113 struct serdev_device *serdev = to_serdev_device(dev); 2114 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2115 struct hci_uart *hu = &qcadev->serdev_hu; 2116 struct qca_data *qca = hu->priv; 2117 unsigned long flags; 2118 bool tx_pending = false; 2119 int ret = 0; 2120 u8 cmd; 2121 u32 wait_timeout = 0; 2122 2123 set_bit(QCA_SUSPENDING, &qca->flags); 2124 2125 /* if BT SoC is running with default firmware then it does not 2126 * support in-band sleep 2127 */ 2128 if (test_bit(QCA_ROM_FW, &qca->flags)) 2129 return 0; 2130 2131 /* During SSR after memory dump collection, controller will be 2132 * powered off and then powered on.If controller is powered off 2133 * during SSR then we should wait until SSR is completed. 2134 */ 2135 if (test_bit(QCA_BT_OFF, &qca->flags) && 2136 !test_bit(QCA_SSR_TRIGGERED, &qca->flags)) 2137 return 0; 2138 2139 if (test_bit(QCA_IBS_DISABLED, &qca->flags) || 2140 test_bit(QCA_SSR_TRIGGERED, &qca->flags)) { 2141 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ? 2142 IBS_DISABLE_SSR_TIMEOUT_MS : 2143 FW_DOWNLOAD_TIMEOUT_MS; 2144 2145 /* QCA_IBS_DISABLED flag is set to true, During FW download 2146 * and during memory dump collection. It is reset to false, 2147 * After FW download complete. 2148 */ 2149 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED, 2150 TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout)); 2151 2152 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) { 2153 bt_dev_err(hu->hdev, "SSR or FW download time out"); 2154 ret = -ETIMEDOUT; 2155 goto error; 2156 } 2157 } 2158 2159 cancel_work_sync(&qca->ws_awake_device); 2160 cancel_work_sync(&qca->ws_awake_rx); 2161 2162 spin_lock_irqsave_nested(&qca->hci_ibs_lock, 2163 flags, SINGLE_DEPTH_NESTING); 2164 2165 switch (qca->tx_ibs_state) { 2166 case HCI_IBS_TX_WAKING: 2167 del_timer(&qca->wake_retrans_timer); 2168 fallthrough; 2169 case HCI_IBS_TX_AWAKE: 2170 del_timer(&qca->tx_idle_timer); 2171 2172 serdev_device_write_flush(hu->serdev); 2173 cmd = HCI_IBS_SLEEP_IND; 2174 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd)); 2175 2176 if (ret < 0) { 2177 BT_ERR("Failed to send SLEEP to device"); 2178 break; 2179 } 2180 2181 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP; 2182 qca->ibs_sent_slps++; 2183 tx_pending = true; 2184 break; 2185 2186 case HCI_IBS_TX_ASLEEP: 2187 break; 2188 2189 default: 2190 BT_ERR("Spurious tx state %d", qca->tx_ibs_state); 2191 ret = -EINVAL; 2192 break; 2193 } 2194 2195 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags); 2196 2197 if (ret < 0) 2198 goto error; 2199 2200 if (tx_pending) { 2201 serdev_device_wait_until_sent(hu->serdev, 2202 msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS)); 2203 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu); 2204 } 2205 2206 /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going 2207 * to sleep, so that the packet does not wake the system later. 2208 */ 2209 ret = wait_event_interruptible_timeout(qca->suspend_wait_q, 2210 qca->rx_ibs_state == HCI_IBS_RX_ASLEEP, 2211 msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS)); 2212 if (ret == 0) { 2213 ret = -ETIMEDOUT; 2214 goto error; 2215 } 2216 2217 return 0; 2218 2219 error: 2220 clear_bit(QCA_SUSPENDING, &qca->flags); 2221 2222 return ret; 2223 } 2224 2225 static int __maybe_unused qca_resume(struct device *dev) 2226 { 2227 struct serdev_device *serdev = to_serdev_device(dev); 2228 struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev); 2229 struct hci_uart *hu = &qcadev->serdev_hu; 2230 struct qca_data *qca = hu->priv; 2231 2232 clear_bit(QCA_SUSPENDING, &qca->flags); 2233 2234 return 0; 2235 } 2236 2237 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume); 2238 2239 #ifdef CONFIG_OF 2240 static const struct of_device_id qca_bluetooth_of_match[] = { 2241 { .compatible = "qcom,qca6174-bt" }, 2242 { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390}, 2243 { .compatible = "qcom,qca9377-bt" }, 2244 { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990}, 2245 { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991}, 2246 { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998}, 2247 { /* sentinel */ } 2248 }; 2249 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match); 2250 #endif 2251 2252 #ifdef CONFIG_ACPI 2253 static const struct acpi_device_id qca_bluetooth_acpi_match[] = { 2254 { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2255 { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2256 { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2257 { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 }, 2258 { }, 2259 }; 2260 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match); 2261 #endif 2262 2263 2264 static struct serdev_device_driver qca_serdev_driver = { 2265 .probe = qca_serdev_probe, 2266 .remove = qca_serdev_remove, 2267 .driver = { 2268 .name = "hci_uart_qca", 2269 .of_match_table = of_match_ptr(qca_bluetooth_of_match), 2270 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match), 2271 .shutdown = qca_serdev_shutdown, 2272 .pm = &qca_pm_ops, 2273 }, 2274 }; 2275 2276 int __init qca_init(void) 2277 { 2278 serdev_device_driver_register(&qca_serdev_driver); 2279 2280 return hci_uart_register_proto(&qca_proto); 2281 } 2282 2283 int __exit qca_deinit(void) 2284 { 2285 serdev_device_driver_unregister(&qca_serdev_driver); 2286 2287 return hci_uart_unregister_proto(&qca_proto); 2288 } 2289