drivers/bluetooth/hci_qca.c

   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 <[email protected]>
  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         QCA_DEBUGFS_CREATED,
  83 };
  84
  85 enum qca_capabilities {
  86         QCA_CAP_WIDEBAND_SPEECH = BIT(0),
  87         QCA_CAP_VALID_LE_STATES = BIT(1),
  88 };
  89
  90 /* HCI_IBS transmit side sleep protocol states */
  91 enum tx_ibs_states {
  92         HCI_IBS_TX_ASLEEP,
  93         HCI_IBS_TX_WAKING,
  94         HCI_IBS_TX_AWAKE,
  95 };
  96
  97 /* HCI_IBS receive side sleep protocol states */
  98 enum rx_states {
  99         HCI_IBS_RX_ASLEEP,
 100         HCI_IBS_RX_AWAKE,
 101 };
 102
 103 /* HCI_IBS transmit and receive side clock state vote */
 104 enum hci_ibs_clock_state_vote {
 105         HCI_IBS_VOTE_STATS_UPDATE,
 106         HCI_IBS_TX_VOTE_CLOCK_ON,
 107         HCI_IBS_TX_VOTE_CLOCK_OFF,
 108         HCI_IBS_RX_VOTE_CLOCK_ON,
 109         HCI_IBS_RX_VOTE_CLOCK_OFF,
 110 };
 111
 112 /* Controller memory dump states */
 113 enum qca_memdump_states {
 114         QCA_MEMDUMP_IDLE,
 115         QCA_MEMDUMP_COLLECTING,
 116         QCA_MEMDUMP_COLLECTED,
 117         QCA_MEMDUMP_TIMEOUT,
 118 };
 119
 120 struct qca_memdump_data {
 121         char *memdump_buf_head;
 122         char *memdump_buf_tail;
 123         u32 current_seq_no;
 124         u32 received_dump;
 125         u32 ram_dump_size;
 126 };
 127
 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_data *qca_memdump;
 164         unsigned long flags;
 165         struct completion drop_ev_comp;
 166         wait_queue_head_t suspend_wait_q;
 167         enum qca_memdump_states memdump_state;
 168         struct mutex hci_memdump_lock;
 169
 170         /* For debugging purpose */
 171         u64 ibs_sent_wacks;
 172         u64 ibs_sent_slps;
 173         u64 ibs_sent_wakes;
 174         u64 ibs_recv_wacks;
 175         u64 ibs_recv_slps;
 176         u64 ibs_recv_wakes;
 177         u64 vote_last_jif;
 178         u32 vote_on_ms;
 179         u32 vote_off_ms;
 180         u64 tx_votes_on;
 181         u64 rx_votes_on;
 182         u64 tx_votes_off;
 183         u64 rx_votes_off;
 184         u64 votes_on;
 185         u64 votes_off;
 186 };
 187
 188 enum qca_speed_type {
 189         QCA_INIT_SPEED = 1,
 190         QCA_OPER_SPEED
 191 };
 192
 193 /*
 194  * Voltage regulator information required for configuring the
 195  * QCA Bluetooth chipset
 196  */
 197 struct qca_vreg {
 198         const char *name;
 199         unsigned int load_uA;
 200 };
 201
 202 struct qca_device_data {
 203         enum qca_btsoc_type soc_type;
 204         struct qca_vreg *vregs;
 205         size_t num_vregs;
 206         uint32_t capabilities;
 207 };
 208
 209 /*
 210  * Platform data for the QCA Bluetooth power driver.
 211  */
 212 struct qca_power {
 213         struct device *dev;
 214         struct regulator_bulk_data *vreg_bulk;
 215         int num_vregs;
 216         bool vregs_on;
 217 };
 218
 219 struct qca_serdev {
 220         struct hci_uart  serdev_hu;
 221         struct gpio_desc *bt_en;
 222         struct gpio_desc *sw_ctrl;
 223         struct clk       *susclk;
 224         enum qca_btsoc_type btsoc_type;
 225         struct qca_power *bt_power;
 226         u32 init_speed;
 227         u32 oper_speed;
 228         const char *firmware_name;
 229 };
 230
 231 static int qca_regulator_enable(struct qca_serdev *qcadev);
 232 static void qca_regulator_disable(struct qca_serdev *qcadev);
 233 static void qca_power_shutdown(struct hci_uart *hu);
 234 static int qca_power_off(struct hci_dev *hdev);
 235 static void qca_controller_memdump(struct work_struct *work);
 236
 237 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
 238 {
 239         enum qca_btsoc_type soc_type;
 240
 241         if (hu->serdev) {
 242                 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
 243
 244                 soc_type = qsd->btsoc_type;
 245         } else {
 246                 soc_type = QCA_ROME;
 247         }
 248
 249         return soc_type;
 250 }
 251
 252 static const char *qca_get_firmware_name(struct hci_uart *hu)
 253 {
 254         if (hu->serdev) {
 255                 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
 256
 257                 return qsd->firmware_name;
 258         } else {
 259                 return NULL;
 260         }
 261 }
 262
 263 static void __serial_clock_on(struct tty_struct *tty)
 264 {
 265         /* TODO: Some chipset requires to enable UART clock on client
 266          * side to save power consumption or manual work is required.
 267          * Please put your code to control UART clock here if needed
 268          */
 269 }
 270
 271 static void __serial_clock_off(struct tty_struct *tty)
 272 {
 273         /* TODO: Some chipset requires to disable UART clock on client
 274          * side to save power consumption or manual work is required.
 275          * Please put your code to control UART clock off here if needed
 276          */
 277 }
 278
 279 /* serial_clock_vote needs to be called with the ibs lock held */
 280 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
 281 {
 282         struct qca_data *qca = hu->priv;
 283         unsigned int diff;
 284
 285         bool old_vote = (qca->tx_vote | qca->rx_vote);
 286         bool new_vote;
 287
 288         switch (vote) {
 289         case HCI_IBS_VOTE_STATS_UPDATE:
 290                 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
 291
 292                 if (old_vote)
 293                         qca->vote_off_ms += diff;
 294                 else
 295                         qca->vote_on_ms += diff;
 296                 return;
 297
 298         case HCI_IBS_TX_VOTE_CLOCK_ON:
 299                 qca->tx_vote = true;
 300                 qca->tx_votes_on++;
 301                 break;
 302
 303         case HCI_IBS_RX_VOTE_CLOCK_ON:
 304                 qca->rx_vote = true;
 305                 qca->rx_votes_on++;
 306                 break;
 307
 308         case HCI_IBS_TX_VOTE_CLOCK_OFF:
 309                 qca->tx_vote = false;
 310                 qca->tx_votes_off++;
 311                 break;
 312
 313         case HCI_IBS_RX_VOTE_CLOCK_OFF:
 314                 qca->rx_vote = false;
 315                 qca->rx_votes_off++;
 316                 break;
 317
 318         default:
 319                 BT_ERR("Voting irregularity");
 320                 return;
 321         }
 322
 323         new_vote = qca->rx_vote | qca->tx_vote;
 324
 325         if (new_vote != old_vote) {
 326                 if (new_vote)
 327                         __serial_clock_on(hu->tty);
 328                 else
 329                         __serial_clock_off(hu->tty);
 330
 331                 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
 332                        vote ? "true" : "false");
 333
 334                 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
 335
 336                 if (new_vote) {
 337                         qca->votes_on++;
 338                         qca->vote_off_ms += diff;
 339                 } else {
 340                         qca->votes_off++;
 341                         qca->vote_on_ms += diff;
 342                 }
 343                 qca->vote_last_jif = jiffies;
 344         }
 345 }
 346
 347 /* Builds and sends an HCI_IBS command packet.
 348  * These are very simple packets with only 1 cmd byte.
 349  */
 350 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
 351 {
 352         int err = 0;
 353         struct sk_buff *skb = NULL;
 354         struct qca_data *qca = hu->priv;
 355
 356         BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
 357
 358         skb = bt_skb_alloc(1, GFP_ATOMIC);
 359         if (!skb) {
 360                 BT_ERR("Failed to allocate memory for HCI_IBS packet");
 361                 return -ENOMEM;
 362         }
 363
 364         /* Assign HCI_IBS type */
 365         skb_put_u8(skb, cmd);
 366
 367         skb_queue_tail(&qca->txq, skb);
 368
 369         return err;
 370 }
 371
 372 static void qca_wq_awake_device(struct work_struct *work)
 373 {
 374         struct qca_data *qca = container_of(work, struct qca_data,
 375                                             ws_awake_device);
 376         struct hci_uart *hu = qca->hu;
 377         unsigned long retrans_delay;
 378         unsigned long flags;
 379
 380         BT_DBG("hu %p wq awake device", hu);
 381
 382         /* Vote for serial clock */
 383         serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
 384
 385         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 386
 387         /* Send wake indication to device */
 388         if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
 389                 BT_ERR("Failed to send WAKE to device");
 390
 391         qca->ibs_sent_wakes++;
 392
 393         /* Start retransmit timer */
 394         retrans_delay = msecs_to_jiffies(qca->wake_retrans);
 395         mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
 396
 397         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 398
 399         /* Actually send the packets */
 400         hci_uart_tx_wakeup(hu);
 401 }
 402
 403 static void qca_wq_awake_rx(struct work_struct *work)
 404 {
 405         struct qca_data *qca = container_of(work, struct qca_data,
 406                                             ws_awake_rx);
 407         struct hci_uart *hu = qca->hu;
 408         unsigned long flags;
 409
 410         BT_DBG("hu %p wq awake rx", hu);
 411
 412         serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
 413
 414         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 415         qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
 416
 417         /* Always acknowledge device wake up,
 418          * sending IBS message doesn't count as TX ON.
 419          */
 420         if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
 421                 BT_ERR("Failed to acknowledge device wake up");
 422
 423         qca->ibs_sent_wacks++;
 424
 425         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 426
 427         /* Actually send the packets */
 428         hci_uart_tx_wakeup(hu);
 429 }
 430
 431 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
 432 {
 433         struct qca_data *qca = container_of(work, struct qca_data,
 434                                             ws_rx_vote_off);
 435         struct hci_uart *hu = qca->hu;
 436
 437         BT_DBG("hu %p rx clock vote off", hu);
 438
 439         serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
 440 }
 441
 442 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
 443 {
 444         struct qca_data *qca = container_of(work, struct qca_data,
 445                                             ws_tx_vote_off);
 446         struct hci_uart *hu = qca->hu;
 447
 448         BT_DBG("hu %p tx clock vote off", hu);
 449
 450         /* Run HCI tx handling unlocked */
 451         hci_uart_tx_wakeup(hu);
 452
 453         /* Now that message queued to tty driver, vote for tty clocks off.
 454          * It is up to the tty driver to pend the clocks off until tx done.
 455          */
 456         serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
 457 }
 458
 459 static void hci_ibs_tx_idle_timeout(struct timer_list *t)
 460 {
 461         struct qca_data *qca = from_timer(qca, t, tx_idle_timer);
 462         struct hci_uart *hu = qca->hu;
 463         unsigned long flags;
 464
 465         BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
 466
 467         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
 468                                  flags, SINGLE_DEPTH_NESTING);
 469
 470         switch (qca->tx_ibs_state) {
 471         case HCI_IBS_TX_AWAKE:
 472                 /* TX_IDLE, go to SLEEP */
 473                 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
 474                         BT_ERR("Failed to send SLEEP to device");
 475                         break;
 476                 }
 477                 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
 478                 qca->ibs_sent_slps++;
 479                 queue_work(qca->workqueue, &qca->ws_tx_vote_off);
 480                 break;
 481
 482         case HCI_IBS_TX_ASLEEP:
 483         case HCI_IBS_TX_WAKING:
 484         default:
 485                 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
 486                 break;
 487         }
 488
 489         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 490 }
 491
 492 static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
 493 {
 494         struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);
 495         struct hci_uart *hu = qca->hu;
 496         unsigned long flags, retrans_delay;
 497         bool retransmit = false;
 498
 499         BT_DBG("hu %p wake retransmit timeout in %d state",
 500                 hu, qca->tx_ibs_state);
 501
 502         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
 503                                  flags, SINGLE_DEPTH_NESTING);
 504
 505         /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */
 506         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 507                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 508                 return;
 509         }
 510
 511         switch (qca->tx_ibs_state) {
 512         case HCI_IBS_TX_WAKING:
 513                 /* No WAKE_ACK, retransmit WAKE */
 514                 retransmit = true;
 515                 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
 516                         BT_ERR("Failed to acknowledge device wake up");
 517                         break;
 518                 }
 519                 qca->ibs_sent_wakes++;
 520                 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
 521                 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
 522                 break;
 523
 524         case HCI_IBS_TX_ASLEEP:
 525         case HCI_IBS_TX_AWAKE:
 526         default:
 527                 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
 528                 break;
 529         }
 530
 531         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 532
 533         if (retransmit)
 534                 hci_uart_tx_wakeup(hu);
 535 }
 536
 537
 538 static void qca_controller_memdump_timeout(struct work_struct *work)
 539 {
 540         struct qca_data *qca = container_of(work, struct qca_data,
 541                                         ctrl_memdump_timeout.work);
 542         struct hci_uart *hu = qca->hu;
 543
 544         mutex_lock(&qca->hci_memdump_lock);
 545         if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {
 546                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
 547                 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
 548                         /* Inject hw error event to reset the device
 549                          * and driver.
 550                          */
 551                         hci_reset_dev(hu->hdev);
 552                 }
 553         }
 554
 555         mutex_unlock(&qca->hci_memdump_lock);
 556 }
 557
 558
 559 /* Initialize protocol */
 560 static int qca_open(struct hci_uart *hu)
 561 {
 562         struct qca_serdev *qcadev;
 563         struct qca_data *qca;
 564
 565         BT_DBG("hu %p qca_open", hu);
 566
 567         if (!hci_uart_has_flow_control(hu))
 568                 return -EOPNOTSUPP;
 569
 570         qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL);
 571         if (!qca)
 572                 return -ENOMEM;
 573
 574         skb_queue_head_init(&qca->txq);
 575         skb_queue_head_init(&qca->tx_wait_q);
 576         skb_queue_head_init(&qca->rx_memdump_q);
 577         spin_lock_init(&qca->hci_ibs_lock);
 578         mutex_init(&qca->hci_memdump_lock);
 579         qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);
 580         if (!qca->workqueue) {
 581                 BT_ERR("QCA Workqueue not initialized properly");
 582                 kfree(qca);
 583                 return -ENOMEM;
 584         }
 585
 586         INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
 587         INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
 588         INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
 589         INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
 590         INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump);
 591         INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout,
 592                           qca_controller_memdump_timeout);
 593         init_waitqueue_head(&qca->suspend_wait_q);
 594
 595         qca->hu = hu;
 596         init_completion(&qca->drop_ev_comp);
 597
 598         /* Assume we start with both sides asleep -- extra wakes OK */
 599         qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
 600         qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
 601
 602         qca->vote_last_jif = jiffies;
 603
 604         hu->priv = qca;
 605
 606         if (hu->serdev) {
 607                 qcadev = serdev_device_get_drvdata(hu->serdev);
 608
 609                 if (qca_is_wcn399x(qcadev->btsoc_type) ||
 610                     qca_is_wcn6750(qcadev->btsoc_type))
 611                         hu->init_speed = qcadev->init_speed;
 612
 613                 if (qcadev->oper_speed)
 614                         hu->oper_speed = qcadev->oper_speed;
 615         }
 616
 617         timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
 618         qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
 619
 620         timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
 621         qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS;
 622
 623         BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
 624                qca->tx_idle_delay, qca->wake_retrans);
 625
 626         return 0;
 627 }
 628
 629 static void qca_debugfs_init(struct hci_dev *hdev)
 630 {
 631         struct hci_uart *hu = hci_get_drvdata(hdev);
 632         struct qca_data *qca = hu->priv;
 633         struct dentry *ibs_dir;
 634         umode_t mode;
 635
 636         if (!hdev->debugfs)
 637                 return;
 638
 639         if (test_and_set_bit(QCA_DEBUGFS_CREATED, &qca->flags))
 640                 return;
 641
 642         ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
 643
 644         /* read only */
 645         mode = 0444;
 646         debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
 647         debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
 648         debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
 649                            &qca->ibs_sent_slps);
 650         debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
 651                            &qca->ibs_sent_wakes);
 652         debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
 653                            &qca->ibs_sent_wacks);
 654         debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
 655                            &qca->ibs_recv_slps);
 656         debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
 657                            &qca->ibs_recv_wakes);
 658         debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
 659                            &qca->ibs_recv_wacks);
 660         debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
 661         debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
 662         debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
 663         debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
 664         debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
 665         debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
 666         debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
 667         debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
 668         debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
 669         debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
 670
 671         /* read/write */
 672         mode = 0644;
 673         debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
 674         debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
 675                            &qca->tx_idle_delay);
 676 }
 677
 678 /* Flush protocol data */
 679 static int qca_flush(struct hci_uart *hu)
 680 {
 681         struct qca_data *qca = hu->priv;
 682
 683         BT_DBG("hu %p qca flush", hu);
 684
 685         skb_queue_purge(&qca->tx_wait_q);
 686         skb_queue_purge(&qca->txq);
 687
 688         return 0;
 689 }
 690
 691 /* Close protocol */
 692 static int qca_close(struct hci_uart *hu)
 693 {
 694         struct qca_data *qca = hu->priv;
 695
 696         BT_DBG("hu %p qca close", hu);
 697
 698         serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
 699
 700         skb_queue_purge(&qca->tx_wait_q);
 701         skb_queue_purge(&qca->txq);
 702         skb_queue_purge(&qca->rx_memdump_q);
 703         /*
 704          * Shut the timers down so they can't be rearmed when
 705          * destroy_workqueue() drains pending work which in turn might try
 706          * to arm a timer.  After shutdown rearm attempts are silently
 707          * ignored by the timer core code.
 708          */
 709         timer_shutdown_sync(&qca->tx_idle_timer);
 710         timer_shutdown_sync(&qca->wake_retrans_timer);
 711         destroy_workqueue(qca->workqueue);
 712         qca->hu = NULL;
 713
 714         kfree_skb(qca->rx_skb);
 715
 716         hu->priv = NULL;
 717
 718         kfree(qca);
 719
 720         return 0;
 721 }
 722
 723 /* Called upon a wake-up-indication from the device.
 724  */
 725 static void device_want_to_wakeup(struct hci_uart *hu)
 726 {
 727         unsigned long flags;
 728         struct qca_data *qca = hu->priv;
 729
 730         BT_DBG("hu %p want to wake up", hu);
 731
 732         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 733
 734         qca->ibs_recv_wakes++;
 735
 736         /* Don't wake the rx up when suspending. */
 737         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 738                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 739                 return;
 740         }
 741
 742         switch (qca->rx_ibs_state) {
 743         case HCI_IBS_RX_ASLEEP:
 744                 /* Make sure clock is on - we may have turned clock off since
 745                  * receiving the wake up indicator awake rx clock.
 746                  */
 747                 queue_work(qca->workqueue, &qca->ws_awake_rx);
 748                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 749                 return;
 750
 751         case HCI_IBS_RX_AWAKE:
 752                 /* Always acknowledge device wake up,
 753                  * sending IBS message doesn't count as TX ON.
 754                  */
 755                 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
 756                         BT_ERR("Failed to acknowledge device wake up");
 757                         break;
 758                 }
 759                 qca->ibs_sent_wacks++;
 760                 break;
 761
 762         default:
 763                 /* Any other state is illegal */
 764                 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
 765                        qca->rx_ibs_state);
 766                 break;
 767         }
 768
 769         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 770
 771         /* Actually send the packets */
 772         hci_uart_tx_wakeup(hu);
 773 }
 774
 775 /* Called upon a sleep-indication from the device.
 776  */
 777 static void device_want_to_sleep(struct hci_uart *hu)
 778 {
 779         unsigned long flags;
 780         struct qca_data *qca = hu->priv;
 781
 782         BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state);
 783
 784         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 785
 786         qca->ibs_recv_slps++;
 787
 788         switch (qca->rx_ibs_state) {
 789         case HCI_IBS_RX_AWAKE:
 790                 /* Update state */
 791                 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
 792                 /* Vote off rx clock under workqueue */
 793                 queue_work(qca->workqueue, &qca->ws_rx_vote_off);
 794                 break;
 795
 796         case HCI_IBS_RX_ASLEEP:
 797                 break;
 798
 799         default:
 800                 /* Any other state is illegal */
 801                 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
 802                        qca->rx_ibs_state);
 803                 break;
 804         }
 805
 806         wake_up_interruptible(&qca->suspend_wait_q);
 807
 808         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 809 }
 810
 811 /* Called upon wake-up-acknowledgement from the device
 812  */
 813 static void device_woke_up(struct hci_uart *hu)
 814 {
 815         unsigned long flags, idle_delay;
 816         struct qca_data *qca = hu->priv;
 817         struct sk_buff *skb = NULL;
 818
 819         BT_DBG("hu %p woke up", hu);
 820
 821         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 822
 823         qca->ibs_recv_wacks++;
 824
 825         /* Don't react to the wake-up-acknowledgment when suspending. */
 826         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 827                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 828                 return;
 829         }
 830
 831         switch (qca->tx_ibs_state) {
 832         case HCI_IBS_TX_AWAKE:
 833                 /* Expect one if we send 2 WAKEs */
 834                 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
 835                        qca->tx_ibs_state);
 836                 break;
 837
 838         case HCI_IBS_TX_WAKING:
 839                 /* Send pending packets */
 840                 while ((skb = skb_dequeue(&qca->tx_wait_q)))
 841                         skb_queue_tail(&qca->txq, skb);
 842
 843                 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
 844                 del_timer(&qca->wake_retrans_timer);
 845                 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
 846                 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
 847                 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
 848                 break;
 849
 850         case HCI_IBS_TX_ASLEEP:
 851         default:
 852                 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
 853                        qca->tx_ibs_state);
 854                 break;
 855         }
 856
 857         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 858
 859         /* Actually send the packets */
 860         hci_uart_tx_wakeup(hu);
 861 }
 862
 863 /* Enqueue frame for transmittion (padding, crc, etc) may be called from
 864  * two simultaneous tasklets.
 865  */
 866 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 867 {
 868         unsigned long flags = 0, idle_delay;
 869         struct qca_data *qca = hu->priv;
 870
 871         BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
 872                qca->tx_ibs_state);
 873
 874         if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
 875                 /* As SSR is in progress, ignore the packets */
 876                 bt_dev_dbg(hu->hdev, "SSR is in progress");
 877                 kfree_skb(skb);
 878                 return 0;
 879         }
 880
 881         /* Prepend skb with frame type */
 882         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 883
 884         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 885
 886         /* Don't go to sleep in middle of patch download or
 887          * Out-Of-Band(GPIOs control) sleep is selected.
 888          * Don't wake the device up when suspending.
 889          */
 890         if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
 891             test_bit(QCA_SUSPENDING, &qca->flags)) {
 892                 skb_queue_tail(&qca->txq, skb);
 893                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 894                 return 0;
 895         }
 896
 897         /* Act according to current state */
 898         switch (qca->tx_ibs_state) {
 899         case HCI_IBS_TX_AWAKE:
 900                 BT_DBG("Device awake, sending normally");
 901                 skb_queue_tail(&qca->txq, skb);
 902                 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
 903                 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
 904                 break;
 905
 906         case HCI_IBS_TX_ASLEEP:
 907                 BT_DBG("Device asleep, waking up and queueing packet");
 908                 /* Save packet for later */
 909                 skb_queue_tail(&qca->tx_wait_q, skb);
 910
 911                 qca->tx_ibs_state = HCI_IBS_TX_WAKING;
 912                 /* Schedule a work queue to wake up device */
 913                 queue_work(qca->workqueue, &qca->ws_awake_device);
 914                 break;
 915
 916         case HCI_IBS_TX_WAKING:
 917                 BT_DBG("Device waking up, queueing packet");
 918                 /* Transient state; just keep packet for later */
 919                 skb_queue_tail(&qca->tx_wait_q, skb);
 920                 break;
 921
 922         default:
 923                 BT_ERR("Illegal tx state: %d (losing packet)",
 924                        qca->tx_ibs_state);
 925                 dev_kfree_skb_irq(skb);
 926                 break;
 927         }
 928
 929         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 930
 931         return 0;
 932 }
 933
 934 static int qca_ibs_sleep_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_SLEEP_IND);
 939
 940         device_want_to_sleep(hu);
 941
 942         kfree_skb(skb);
 943         return 0;
 944 }
 945
 946 static int qca_ibs_wake_ind(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_IND);
 951
 952         device_want_to_wakeup(hu);
 953
 954         kfree_skb(skb);
 955         return 0;
 956 }
 957
 958 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
 959 {
 960         struct hci_uart *hu = hci_get_drvdata(hdev);
 961
 962         BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
 963
 964         device_woke_up(hu);
 965
 966         kfree_skb(skb);
 967         return 0;
 968 }
 969
 970 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb)
 971 {
 972         /* We receive debug logs from chip as an ACL packets.
 973          * Instead of sending the data to ACL to decode the
 974          * received data, we are pushing them to the above layers
 975          * as a diagnostic packet.
 976          */
 977         if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE)
 978                 return hci_recv_diag(hdev, skb);
 979
 980         return hci_recv_frame(hdev, skb);
 981 }
 982
 983 static void qca_controller_memdump(struct work_struct *work)
 984 {
 985         struct qca_data *qca = container_of(work, struct qca_data,
 986                                             ctrl_memdump_evt);
 987         struct hci_uart *hu = qca->hu;
 988         struct sk_buff *skb;
 989         struct qca_memdump_event_hdr *cmd_hdr;
 990         struct qca_memdump_data *qca_memdump = qca->qca_memdump;
 991         struct qca_dump_size *dump;
 992         char *memdump_buf;
 993         char nullBuff[QCA_DUMP_PACKET_SIZE] = { 0 };
 994         u16 seq_no;
 995         u32 dump_size;
 996         u32 rx_size;
 997         enum qca_btsoc_type soc_type = qca_soc_type(hu);
 998
 999         while ((skb = skb_dequeue(&qca->rx_memdump_q))) {
1000
1001                 mutex_lock(&qca->hci_memdump_lock);
1002                 /* Skip processing the received packets if timeout detected
1003                  * or memdump collection completed.
1004                  */
1005                 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1006                     qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1007                         mutex_unlock(&qca->hci_memdump_lock);
1008                         return;
1009                 }
1010
1011                 if (!qca_memdump) {
1012                         qca_memdump = kzalloc(sizeof(struct qca_memdump_data),
1013                                               GFP_ATOMIC);
1014                         if (!qca_memdump) {
1015                                 mutex_unlock(&qca->hci_memdump_lock);
1016                                 return;
1017                         }
1018
1019                         qca->qca_memdump = qca_memdump;
1020                 }
1021
1022                 qca->memdump_state = QCA_MEMDUMP_COLLECTING;
1023                 cmd_hdr = (void *) skb->data;
1024                 seq_no = __le16_to_cpu(cmd_hdr->seq_no);
1025                 skb_pull(skb, sizeof(struct qca_memdump_event_hdr));
1026
1027                 if (!seq_no) {
1028
1029                         /* This is the first frame of memdump packet from
1030                          * the controller, Disable IBS to recevie dump
1031                          * with out any interruption, ideally time required for
1032                          * the controller to send the dump is 8 seconds. let us
1033                          * start timer to handle this asynchronous activity.
1034                          */
1035                         set_bit(QCA_IBS_DISABLED, &qca->flags);
1036                         set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1037                         dump = (void *) skb->data;
1038                         dump_size = __le32_to_cpu(dump->dump_size);
1039                         if (!(dump_size)) {
1040                                 bt_dev_err(hu->hdev, "Rx invalid memdump size");
1041                                 kfree(qca_memdump);
1042                                 kfree_skb(skb);
1043                                 qca->qca_memdump = NULL;
1044                                 mutex_unlock(&qca->hci_memdump_lock);
1045                                 return;
1046                         }
1047
1048                         bt_dev_info(hu->hdev, "QCA collecting dump of size:%u",
1049                                     dump_size);
1050                         queue_delayed_work(qca->workqueue,
1051                                            &qca->ctrl_memdump_timeout,
1052                                            msecs_to_jiffies(MEMDUMP_TIMEOUT_MS)
1053                                           );
1054
1055                         skb_pull(skb, sizeof(dump_size));
1056                         memdump_buf = vmalloc(dump_size);
1057                         qca_memdump->ram_dump_size = dump_size;
1058                         qca_memdump->memdump_buf_head = memdump_buf;
1059                         qca_memdump->memdump_buf_tail = memdump_buf;
1060                 }
1061
1062                 memdump_buf = qca_memdump->memdump_buf_tail;
1063
1064                 /* If sequence no 0 is missed then there is no point in
1065                  * accepting the other sequences.
1066                  */
1067                 if (!memdump_buf) {
1068                         bt_dev_err(hu->hdev, "QCA: Discarding other packets");
1069                         kfree(qca_memdump);
1070                         kfree_skb(skb);
1071                         qca->qca_memdump = NULL;
1072                         mutex_unlock(&qca->hci_memdump_lock);
1073                         return;
1074                 }
1075
1076                 /* There could be chance of missing some packets from
1077                  * the controller. In such cases let us store the dummy
1078                  * packets in the buffer.
1079                  */
1080                 /* For QCA6390, controller does not lost packets but
1081                  * sequence number field of packet sometimes has error
1082                  * bits, so skip this checking for missing packet.
1083                  */
1084                 while ((seq_no > qca_memdump->current_seq_no + 1) &&
1085                        (soc_type != QCA_QCA6390) &&
1086                        seq_no != QCA_LAST_SEQUENCE_NUM) {
1087                         bt_dev_err(hu->hdev, "QCA controller missed packet:%d",
1088                                    qca_memdump->current_seq_no);
1089                         rx_size = qca_memdump->received_dump;
1090                         rx_size += QCA_DUMP_PACKET_SIZE;
1091                         if (rx_size > qca_memdump->ram_dump_size) {
1092                                 bt_dev_err(hu->hdev,
1093                                            "QCA memdump received %d, no space for missed packet",
1094                                            qca_memdump->received_dump);
1095                                 break;
1096                         }
1097                         memcpy(memdump_buf, nullBuff, QCA_DUMP_PACKET_SIZE);
1098                         memdump_buf = memdump_buf + QCA_DUMP_PACKET_SIZE;
1099                         qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE;
1100                         qca_memdump->current_seq_no++;
1101                 }
1102
1103                 rx_size = qca_memdump->received_dump + skb->len;
1104                 if (rx_size <= qca_memdump->ram_dump_size) {
1105                         if ((seq_no != QCA_LAST_SEQUENCE_NUM) &&
1106                             (seq_no != qca_memdump->current_seq_no))
1107                                 bt_dev_err(hu->hdev,
1108                                            "QCA memdump unexpected packet %d",
1109                                            seq_no);
1110                         bt_dev_dbg(hu->hdev,
1111                                    "QCA memdump packet %d with length %d",
1112                                    seq_no, skb->len);
1113                         memcpy(memdump_buf, (unsigned char *)skb->data,
1114                                skb->len);
1115                         memdump_buf = memdump_buf + skb->len;
1116                         qca_memdump->memdump_buf_tail = memdump_buf;
1117                         qca_memdump->current_seq_no = seq_no + 1;
1118                         qca_memdump->received_dump += skb->len;
1119                 } else {
1120                         bt_dev_err(hu->hdev,
1121                                    "QCA memdump received %d, no space for packet %d",
1122                                    qca_memdump->received_dump, seq_no);
1123                 }
1124                 qca->qca_memdump = qca_memdump;
1125                 kfree_skb(skb);
1126                 if (seq_no == QCA_LAST_SEQUENCE_NUM) {
1127                         bt_dev_info(hu->hdev,
1128                                     "QCA memdump Done, received %d, total %d",
1129                                     qca_memdump->received_dump,
1130                                     qca_memdump->ram_dump_size);
1131                         memdump_buf = qca_memdump->memdump_buf_head;
1132                         dev_coredumpv(&hu->serdev->dev, memdump_buf,
1133                                       qca_memdump->received_dump, GFP_KERNEL);
1134                         cancel_delayed_work(&qca->ctrl_memdump_timeout);
1135                         kfree(qca->qca_memdump);
1136                         qca->qca_memdump = NULL;
1137                         qca->memdump_state = QCA_MEMDUMP_COLLECTED;
1138                         clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1139                 }
1140
1141                 mutex_unlock(&qca->hci_memdump_lock);
1142         }
1143
1144 }
1145
1146 static int qca_controller_memdump_event(struct hci_dev *hdev,
1147                                         struct sk_buff *skb)
1148 {
1149         struct hci_uart *hu = hci_get_drvdata(hdev);
1150         struct qca_data *qca = hu->priv;
1151
1152         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1153         skb_queue_tail(&qca->rx_memdump_q, skb);
1154         queue_work(qca->workqueue, &qca->ctrl_memdump_evt);
1155
1156         return 0;
1157 }
1158
1159 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
1160 {
1161         struct hci_uart *hu = hci_get_drvdata(hdev);
1162         struct qca_data *qca = hu->priv;
1163
1164         if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) {
1165                 struct hci_event_hdr *hdr = (void *)skb->data;
1166
1167                 /* For the WCN3990 the vendor command for a baudrate change
1168                  * isn't sent as synchronous HCI command, because the
1169                  * controller sends the corresponding vendor event with the
1170                  * new baudrate. The event is received and properly decoded
1171                  * after changing the baudrate of the host port. It needs to
1172                  * be dropped, otherwise it can be misinterpreted as
1173                  * response to a later firmware download command (also a
1174                  * vendor command).
1175                  */
1176
1177                 if (hdr->evt == HCI_EV_VENDOR)
1178                         complete(&qca->drop_ev_comp);
1179
1180                 kfree_skb(skb);
1181
1182                 return 0;
1183         }
1184         /* We receive chip memory dump as an event packet, With a dedicated
1185          * handler followed by a hardware error event. When this event is
1186          * received we store dump into a file before closing hci. This
1187          * dump will help in triaging the issues.
1188          */
1189         if ((skb->data[0] == HCI_VENDOR_PKT) &&
1190             (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE))
1191                 return qca_controller_memdump_event(hdev, skb);
1192
1193         return hci_recv_frame(hdev, skb);
1194 }
1195
1196 #define QCA_IBS_SLEEP_IND_EVENT \
1197         .type = HCI_IBS_SLEEP_IND, \
1198         .hlen = 0, \
1199         .loff = 0, \
1200         .lsize = 0, \
1201         .maxlen = HCI_MAX_IBS_SIZE
1202
1203 #define QCA_IBS_WAKE_IND_EVENT \
1204         .type = HCI_IBS_WAKE_IND, \
1205         .hlen = 0, \
1206         .loff = 0, \
1207         .lsize = 0, \
1208         .maxlen = HCI_MAX_IBS_SIZE
1209
1210 #define QCA_IBS_WAKE_ACK_EVENT \
1211         .type = HCI_IBS_WAKE_ACK, \
1212         .hlen = 0, \
1213         .loff = 0, \
1214         .lsize = 0, \
1215         .maxlen = HCI_MAX_IBS_SIZE
1216
1217 static const struct h4_recv_pkt qca_recv_pkts[] = {
1218         { H4_RECV_ACL,             .recv = qca_recv_acl_data },
1219         { H4_RECV_SCO,             .recv = hci_recv_frame    },
1220         { H4_RECV_EVENT,           .recv = qca_recv_event    },
1221         { QCA_IBS_WAKE_IND_EVENT,  .recv = qca_ibs_wake_ind  },
1222         { QCA_IBS_WAKE_ACK_EVENT,  .recv = qca_ibs_wake_ack  },
1223         { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
1224 };
1225
1226 static int qca_recv(struct hci_uart *hu, const void *data, int count)
1227 {
1228         struct qca_data *qca = hu->priv;
1229
1230         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
1231                 return -EUNATCH;
1232
1233         qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
1234                                   qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
1235         if (IS_ERR(qca->rx_skb)) {
1236                 int err = PTR_ERR(qca->rx_skb);
1237                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
1238                 qca->rx_skb = NULL;
1239                 return err;
1240         }
1241
1242         return count;
1243 }
1244
1245 static struct sk_buff *qca_dequeue(struct hci_uart *hu)
1246 {
1247         struct qca_data *qca = hu->priv;
1248
1249         return skb_dequeue(&qca->txq);
1250 }
1251
1252 static uint8_t qca_get_baudrate_value(int speed)
1253 {
1254         switch (speed) {
1255         case 9600:
1256                 return QCA_BAUDRATE_9600;
1257         case 19200:
1258                 return QCA_BAUDRATE_19200;
1259         case 38400:
1260                 return QCA_BAUDRATE_38400;
1261         case 57600:
1262                 return QCA_BAUDRATE_57600;
1263         case 115200:
1264                 return QCA_BAUDRATE_115200;
1265         case 230400:
1266                 return QCA_BAUDRATE_230400;
1267         case 460800:
1268                 return QCA_BAUDRATE_460800;
1269         case 500000:
1270                 return QCA_BAUDRATE_500000;
1271         case 921600:
1272                 return QCA_BAUDRATE_921600;
1273         case 1000000:
1274                 return QCA_BAUDRATE_1000000;
1275         case 2000000:
1276                 return QCA_BAUDRATE_2000000;
1277         case 3000000:
1278                 return QCA_BAUDRATE_3000000;
1279         case 3200000:
1280                 return QCA_BAUDRATE_3200000;
1281         case 3500000:
1282                 return QCA_BAUDRATE_3500000;
1283         default:
1284                 return QCA_BAUDRATE_115200;
1285         }
1286 }
1287
1288 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
1289 {
1290         struct hci_uart *hu = hci_get_drvdata(hdev);
1291         struct qca_data *qca = hu->priv;
1292         struct sk_buff *skb;
1293         u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
1294
1295         if (baudrate > QCA_BAUDRATE_3200000)
1296                 return -EINVAL;
1297
1298         cmd[4] = baudrate;
1299
1300         skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1301         if (!skb) {
1302                 bt_dev_err(hdev, "Failed to allocate baudrate packet");
1303                 return -ENOMEM;
1304         }
1305
1306         /* Assign commands to change baudrate and packet type. */
1307         skb_put_data(skb, cmd, sizeof(cmd));
1308         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1309
1310         skb_queue_tail(&qca->txq, skb);
1311         hci_uart_tx_wakeup(hu);
1312
1313         /* Wait for the baudrate change request to be sent */
1314
1315         while (!skb_queue_empty(&qca->txq))
1316                 usleep_range(100, 200);
1317
1318         if (hu->serdev)
1319                 serdev_device_wait_until_sent(hu->serdev,
1320                       msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
1321
1322         /* Give the controller time to process the request */
1323         if (qca_is_wcn399x(qca_soc_type(hu)) ||
1324             qca_is_wcn6750(qca_soc_type(hu)) ||
1325             qca_is_wcn6855(qca_soc_type(hu)))
1326                 usleep_range(1000, 10000);
1327         else
1328                 msleep(300);
1329
1330         return 0;
1331 }
1332
1333 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
1334 {
1335         if (hu->serdev)
1336                 serdev_device_set_baudrate(hu->serdev, speed);
1337         else
1338                 hci_uart_set_baudrate(hu, speed);
1339 }
1340
1341 static int qca_send_power_pulse(struct hci_uart *hu, bool on)
1342 {
1343         int ret;
1344         int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
1345         u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;
1346
1347         /* These power pulses are single byte command which are sent
1348          * at required baudrate to wcn3990. On wcn3990, we have an external
1349          * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1350          * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1351          * and also we use the same power inputs to turn on and off for
1352          * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1353          * we send a power on pulse at 115200 bps. This algorithm will help to
1354          * save power. Disabling hardware flow control is mandatory while
1355          * sending power pulses to SoC.
1356          */
1357         bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);
1358
1359         serdev_device_write_flush(hu->serdev);
1360         hci_uart_set_flow_control(hu, true);
1361         ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
1362         if (ret < 0) {
1363                 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);
1364                 return ret;
1365         }
1366
1367         serdev_device_wait_until_sent(hu->serdev, timeout);
1368         hci_uart_set_flow_control(hu, false);
1369
1370         /* Give to controller time to boot/shutdown */
1371         if (on)
1372                 msleep(100);
1373         else
1374                 usleep_range(1000, 10000);
1375
1376         return 0;
1377 }
1378
1379 static unsigned int qca_get_speed(struct hci_uart *hu,
1380                                   enum qca_speed_type speed_type)
1381 {
1382         unsigned int speed = 0;
1383
1384         if (speed_type == QCA_INIT_SPEED) {
1385                 if (hu->init_speed)
1386                         speed = hu->init_speed;
1387                 else if (hu->proto->init_speed)
1388                         speed = hu->proto->init_speed;
1389         } else {
1390                 if (hu->oper_speed)
1391                         speed = hu->oper_speed;
1392                 else if (hu->proto->oper_speed)
1393                         speed = hu->proto->oper_speed;
1394         }
1395
1396         return speed;
1397 }
1398
1399 static int qca_check_speeds(struct hci_uart *hu)
1400 {
1401         if (qca_is_wcn399x(qca_soc_type(hu)) ||
1402             qca_is_wcn6750(qca_soc_type(hu)) ||
1403             qca_is_wcn6855(qca_soc_type(hu))) {
1404                 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
1405                     !qca_get_speed(hu, QCA_OPER_SPEED))
1406                         return -EINVAL;
1407         } else {
1408                 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
1409                     !qca_get_speed(hu, QCA_OPER_SPEED))
1410                         return -EINVAL;
1411         }
1412
1413         return 0;
1414 }
1415
1416 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
1417 {
1418         unsigned int speed, qca_baudrate;
1419         struct qca_data *qca = hu->priv;
1420         int ret = 0;
1421
1422         if (speed_type == QCA_INIT_SPEED) {
1423                 speed = qca_get_speed(hu, QCA_INIT_SPEED);
1424                 if (speed)
1425                         host_set_baudrate(hu, speed);
1426         } else {
1427                 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1428
1429                 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1430                 if (!speed)
1431                         return 0;
1432
1433                 /* Disable flow control for wcn3990 to deassert RTS while
1434                  * changing the baudrate of chip and host.
1435                  */
1436                 if (qca_is_wcn399x(soc_type) ||
1437                     qca_is_wcn6750(soc_type) ||
1438                     qca_is_wcn6855(soc_type))
1439                         hci_uart_set_flow_control(hu, true);
1440
1441                 if (soc_type == QCA_WCN3990) {
1442                         reinit_completion(&qca->drop_ev_comp);
1443                         set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1444                 }
1445
1446                 qca_baudrate = qca_get_baudrate_value(speed);
1447                 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
1448                 ret = qca_set_baudrate(hu->hdev, qca_baudrate);
1449                 if (ret)
1450                         goto error;
1451
1452                 host_set_baudrate(hu, speed);
1453
1454 error:
1455                 if (qca_is_wcn399x(soc_type) ||
1456                     qca_is_wcn6750(soc_type) ||
1457                     qca_is_wcn6855(soc_type))
1458                         hci_uart_set_flow_control(hu, false);
1459
1460                 if (soc_type == QCA_WCN3990) {
1461                         /* Wait for the controller to send the vendor event
1462                          * for the baudrate change command.
1463                          */
1464                         if (!wait_for_completion_timeout(&qca->drop_ev_comp,
1465                                                  msecs_to_jiffies(100))) {
1466                                 bt_dev_err(hu->hdev,
1467                                            "Failed to change controller baudrate\n");
1468                                 ret = -ETIMEDOUT;
1469                         }
1470
1471                         clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1472                 }
1473         }
1474
1475         return ret;
1476 }
1477
1478 static int qca_send_crashbuffer(struct hci_uart *hu)
1479 {
1480         struct qca_data *qca = hu->priv;
1481         struct sk_buff *skb;
1482
1483         skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL);
1484         if (!skb) {
1485                 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet");
1486                 return -ENOMEM;
1487         }
1488
1489         /* We forcefully crash the controller, by sending 0xfb byte for
1490          * 1024 times. We also might have chance of losing data, To be
1491          * on safer side we send 1096 bytes to the SoC.
1492          */
1493         memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE,
1494                QCA_CRASHBYTE_PACKET_LEN);
1495         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1496         bt_dev_info(hu->hdev, "crash the soc to collect controller dump");
1497         skb_queue_tail(&qca->txq, skb);
1498         hci_uart_tx_wakeup(hu);
1499
1500         return 0;
1501 }
1502
1503 static void qca_wait_for_dump_collection(struct hci_dev *hdev)
1504 {
1505         struct hci_uart *hu = hci_get_drvdata(hdev);
1506         struct qca_data *qca = hu->priv;
1507
1508         wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION,
1509                             TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS);
1510
1511         clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1512 }
1513
1514 static void qca_hw_error(struct hci_dev *hdev, u8 code)
1515 {
1516         struct hci_uart *hu = hci_get_drvdata(hdev);
1517         struct qca_data *qca = hu->priv;
1518
1519         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1520         set_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1521         bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state);
1522
1523         if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1524                 /* If hardware error event received for other than QCA
1525                  * soc memory dump event, then we need to crash the SOC
1526                  * and wait here for 8 seconds to get the dump packets.
1527                  * This will block main thread to be on hold until we
1528                  * collect dump.
1529                  */
1530                 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1531                 qca_send_crashbuffer(hu);
1532                 qca_wait_for_dump_collection(hdev);
1533         } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1534                 /* Let us wait here until memory dump collected or
1535                  * memory dump timer expired.
1536                  */
1537                 bt_dev_info(hdev, "waiting for dump to complete");
1538                 qca_wait_for_dump_collection(hdev);
1539         }
1540
1541         mutex_lock(&qca->hci_memdump_lock);
1542         if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1543                 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout");
1544                 if (qca->qca_memdump) {
1545                         vfree(qca->qca_memdump->memdump_buf_head);
1546                         kfree(qca->qca_memdump);
1547                         qca->qca_memdump = NULL;
1548                 }
1549                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1550                 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1551         }
1552         mutex_unlock(&qca->hci_memdump_lock);
1553
1554         if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1555             qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1556                 cancel_work_sync(&qca->ctrl_memdump_evt);
1557                 skb_queue_purge(&qca->rx_memdump_q);
1558         }
1559
1560         clear_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1561 }
1562
1563 static void qca_cmd_timeout(struct hci_dev *hdev)
1564 {
1565         struct hci_uart *hu = hci_get_drvdata(hdev);
1566         struct qca_data *qca = hu->priv;
1567
1568         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1569         if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1570                 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1571                 qca_send_crashbuffer(hu);
1572                 qca_wait_for_dump_collection(hdev);
1573         } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1574                 /* Let us wait here until memory dump collected or
1575                  * memory dump timer expired.
1576                  */
1577                 bt_dev_info(hdev, "waiting for dump to complete");
1578                 qca_wait_for_dump_collection(hdev);
1579         }
1580
1581         mutex_lock(&qca->hci_memdump_lock);
1582         if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1583                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1584                 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
1585                         /* Inject hw error event to reset the device
1586                          * and driver.
1587                          */
1588                         hci_reset_dev(hu->hdev);
1589                 }
1590         }
1591         mutex_unlock(&qca->hci_memdump_lock);
1592 }
1593
1594 static bool qca_wakeup(struct hci_dev *hdev)
1595 {
1596         struct hci_uart *hu = hci_get_drvdata(hdev);
1597         bool wakeup;
1598
1599         /* BT SoC attached through the serial bus is handled by the serdev driver.
1600          * So we need to use the device handle of the serdev driver to get the
1601          * status of device may wakeup.
1602          */
1603         wakeup = device_may_wakeup(&hu->serdev->ctrl->dev);
1604         bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup);
1605
1606         return wakeup;
1607 }
1608
1609 static int qca_regulator_init(struct hci_uart *hu)
1610 {
1611         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1612         struct qca_serdev *qcadev;
1613         int ret;
1614         bool sw_ctrl_state;
1615
1616         /* Check for vregs status, may be hci down has turned
1617          * off the voltage regulator.
1618          */
1619         qcadev = serdev_device_get_drvdata(hu->serdev);
1620         if (!qcadev->bt_power->vregs_on) {
1621                 serdev_device_close(hu->serdev);
1622                 ret = qca_regulator_enable(qcadev);
1623                 if (ret)
1624                         return ret;
1625
1626                 ret = serdev_device_open(hu->serdev);
1627                 if (ret) {
1628                         bt_dev_err(hu->hdev, "failed to open port");
1629                         return ret;
1630                 }
1631         }
1632
1633         if (qca_is_wcn399x(soc_type)) {
1634                 /* Forcefully enable wcn399x to enter in to boot mode. */
1635                 host_set_baudrate(hu, 2400);
1636                 ret = qca_send_power_pulse(hu, false);
1637                 if (ret)
1638                         return ret;
1639         }
1640
1641         /* For wcn6750 need to enable gpio bt_en */
1642         if (qcadev->bt_en) {
1643                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1644                 msleep(50);
1645                 gpiod_set_value_cansleep(qcadev->bt_en, 1);
1646                 msleep(50);
1647                 if (qcadev->sw_ctrl) {
1648                         sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
1649                         bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
1650                 }
1651         }
1652
1653         qca_set_speed(hu, QCA_INIT_SPEED);
1654
1655         if (qca_is_wcn399x(soc_type)) {
1656                 ret = qca_send_power_pulse(hu, true);
1657                 if (ret)
1658                         return ret;
1659         }
1660
1661         /* Now the device is in ready state to communicate with host.
1662          * To sync host with device we need to reopen port.
1663          * Without this, we will have RTS and CTS synchronization
1664          * issues.
1665          */
1666         serdev_device_close(hu->serdev);
1667         ret = serdev_device_open(hu->serdev);
1668         if (ret) {
1669                 bt_dev_err(hu->hdev, "failed to open port");
1670                 return ret;
1671         }
1672
1673         hci_uart_set_flow_control(hu, false);
1674
1675         return 0;
1676 }
1677
1678 static int qca_power_on(struct hci_dev *hdev)
1679 {
1680         struct hci_uart *hu = hci_get_drvdata(hdev);
1681         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1682         struct qca_serdev *qcadev;
1683         struct qca_data *qca = hu->priv;
1684         int ret = 0;
1685
1686         /* Non-serdev device usually is powered by external power
1687          * and don't need additional action in driver for power on
1688          */
1689         if (!hu->serdev)
1690                 return 0;
1691
1692         if (qca_is_wcn399x(soc_type) ||
1693             qca_is_wcn6750(soc_type) ||
1694             qca_is_wcn6855(soc_type)) {
1695                 ret = qca_regulator_init(hu);
1696         } else {
1697                 qcadev = serdev_device_get_drvdata(hu->serdev);
1698                 if (qcadev->bt_en) {
1699                         gpiod_set_value_cansleep(qcadev->bt_en, 1);
1700                         /* Controller needs time to bootup. */
1701                         msleep(150);
1702                 }
1703         }
1704
1705         clear_bit(QCA_BT_OFF, &qca->flags);
1706         return ret;
1707 }
1708
1709 static int qca_setup(struct hci_uart *hu)
1710 {
1711         struct hci_dev *hdev = hu->hdev;
1712         struct qca_data *qca = hu->priv;
1713         unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
1714         unsigned int retries = 0;
1715         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1716         const char *firmware_name = qca_get_firmware_name(hu);
1717         int ret;
1718         struct qca_btsoc_version ver;
1719
1720         ret = qca_check_speeds(hu);
1721         if (ret)
1722                 return ret;
1723
1724         clear_bit(QCA_ROM_FW, &qca->flags);
1725         /* Patch downloading has to be done without IBS mode */
1726         set_bit(QCA_IBS_DISABLED, &qca->flags);
1727
1728         /* Enable controller to do both LE scan and BR/EDR inquiry
1729          * simultaneously.
1730          */
1731         set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1732
1733         bt_dev_info(hdev, "setting up %s",
1734                 qca_is_wcn399x(soc_type) ? "wcn399x" :
1735                 (soc_type == QCA_WCN6750) ? "wcn6750" :
1736                 (soc_type == QCA_WCN6855) ? "wcn6855" : "ROME/QCA6390");
1737
1738         qca->memdump_state = QCA_MEMDUMP_IDLE;
1739
1740 retry:
1741         ret = qca_power_on(hdev);
1742         if (ret)
1743                 goto out;
1744
1745         clear_bit(QCA_SSR_TRIGGERED, &qca->flags);
1746
1747         if (qca_is_wcn399x(soc_type) ||
1748             qca_is_wcn6750(soc_type) ||
1749             qca_is_wcn6855(soc_type)) {
1750                 set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
1751                 hci_set_aosp_capable(hdev);
1752
1753                 ret = qca_read_soc_version(hdev, &ver, soc_type);
1754                 if (ret)
1755                         goto out;
1756         } else {
1757                 qca_set_speed(hu, QCA_INIT_SPEED);
1758         }
1759
1760         /* Setup user speed if needed */
1761         speed = qca_get_speed(hu, QCA_OPER_SPEED);
1762         if (speed) {
1763                 ret = qca_set_speed(hu, QCA_OPER_SPEED);
1764                 if (ret)
1765                         goto out;
1766
1767                 qca_baudrate = qca_get_baudrate_value(speed);
1768         }
1769
1770         if (!(qca_is_wcn399x(soc_type) ||
1771               qca_is_wcn6750(soc_type) ||
1772               qca_is_wcn6855(soc_type))) {
1773                 /* Get QCA version information */
1774                 ret = qca_read_soc_version(hdev, &ver, soc_type);
1775                 if (ret)
1776                         goto out;
1777         }
1778
1779         /* Setup patch / NVM configurations */
1780         ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver,
1781                         firmware_name);
1782         if (!ret) {
1783                 clear_bit(QCA_IBS_DISABLED, &qca->flags);
1784                 qca_debugfs_init(hdev);
1785                 hu->hdev->hw_error = qca_hw_error;
1786                 hu->hdev->cmd_timeout = qca_cmd_timeout;
1787                 if (device_can_wakeup(hu->serdev->ctrl->dev.parent))
1788                         hu->hdev->wakeup = qca_wakeup;
1789         } else if (ret == -ENOENT) {
1790                 /* No patch/nvm-config found, run with original fw/config */
1791                 set_bit(QCA_ROM_FW, &qca->flags);
1792                 ret = 0;
1793         } else if (ret == -EAGAIN) {
1794                 /*
1795                  * Userspace firmware loader will return -EAGAIN in case no
1796                  * patch/nvm-config is found, so run with original fw/config.
1797                  */
1798                 set_bit(QCA_ROM_FW, &qca->flags);
1799                 ret = 0;
1800         }
1801
1802 out:
1803         if (ret && retries < MAX_INIT_RETRIES) {
1804                 bt_dev_warn(hdev, "Retry BT power ON:%d", retries);
1805                 qca_power_shutdown(hu);
1806                 if (hu->serdev) {
1807                         serdev_device_close(hu->serdev);
1808                         ret = serdev_device_open(hu->serdev);
1809                         if (ret) {
1810                                 bt_dev_err(hdev, "failed to open port");
1811                                 return ret;
1812                         }
1813                 }
1814                 retries++;
1815                 goto retry;
1816         }
1817
1818         /* Setup bdaddr */
1819         if (soc_type == QCA_ROME)
1820                 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
1821         else
1822                 hu->hdev->set_bdaddr = qca_set_bdaddr;
1823
1824         return ret;
1825 }
1826
1827 static const struct hci_uart_proto qca_proto = {
1828         .id             = HCI_UART_QCA,
1829         .name           = "QCA",
1830         .manufacturer   = 29,
1831         .init_speed     = 115200,
1832         .oper_speed     = 3000000,
1833         .open           = qca_open,
1834         .close          = qca_close,
1835         .flush          = qca_flush,
1836         .setup          = qca_setup,
1837         .recv           = qca_recv,
1838         .enqueue        = qca_enqueue,
1839         .dequeue        = qca_dequeue,
1840 };
1841
1842 static const struct qca_device_data qca_soc_data_wcn3990 __maybe_unused = {
1843         .soc_type = QCA_WCN3990,
1844         .vregs = (struct qca_vreg []) {
1845                 { "vddio", 15000  },
1846                 { "vddxo", 80000  },
1847                 { "vddrf", 300000 },
1848                 { "vddch0", 450000 },
1849         },
1850         .num_vregs = 4,
1851 };
1852
1853 static const struct qca_device_data qca_soc_data_wcn3991 __maybe_unused = {
1854         .soc_type = QCA_WCN3991,
1855         .vregs = (struct qca_vreg []) {
1856                 { "vddio", 15000  },
1857                 { "vddxo", 80000  },
1858                 { "vddrf", 300000 },
1859                 { "vddch0", 450000 },
1860         },
1861         .num_vregs = 4,
1862         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
1863 };
1864
1865 static const struct qca_device_data qca_soc_data_wcn3998 __maybe_unused = {
1866         .soc_type = QCA_WCN3998,
1867         .vregs = (struct qca_vreg []) {
1868                 { "vddio", 10000  },
1869                 { "vddxo", 80000  },
1870                 { "vddrf", 300000 },
1871                 { "vddch0", 450000 },
1872         },
1873         .num_vregs = 4,
1874 };
1875
1876 static const struct qca_device_data qca_soc_data_qca6390 __maybe_unused = {
1877         .soc_type = QCA_QCA6390,
1878         .num_vregs = 0,
1879 };
1880
1881 static const struct qca_device_data qca_soc_data_wcn6750 __maybe_unused = {
1882         .soc_type = QCA_WCN6750,
1883         .vregs = (struct qca_vreg []) {
1884                 { "vddio", 5000 },
1885                 { "vddaon", 26000 },
1886                 { "vddbtcxmx", 126000 },
1887                 { "vddrfacmn", 12500 },
1888                 { "vddrfa0p8", 102000 },
1889                 { "vddrfa1p7", 302000 },
1890                 { "vddrfa1p2", 257000 },
1891                 { "vddrfa2p2", 1700000 },
1892                 { "vddasd", 200 },
1893         },
1894         .num_vregs = 9,
1895         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
1896 };
1897
1898 static const struct qca_device_data qca_soc_data_wcn6855 __maybe_unused = {
1899         .soc_type = QCA_WCN6855,
1900         .vregs = (struct qca_vreg []) {
1901                 { "vddio", 5000 },
1902                 { "vddbtcxmx", 126000 },
1903                 { "vddrfacmn", 12500 },
1904                 { "vddrfa0p8", 102000 },
1905                 { "vddrfa1p7", 302000 },
1906                 { "vddrfa1p2", 257000 },
1907         },
1908         .num_vregs = 6,
1909         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
1910 };
1911
1912 static void qca_power_shutdown(struct hci_uart *hu)
1913 {
1914         struct qca_serdev *qcadev;
1915         struct qca_data *qca = hu->priv;
1916         unsigned long flags;
1917         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1918         bool sw_ctrl_state;
1919
1920         /* From this point we go into power off state. But serial port is
1921          * still open, stop queueing the IBS data and flush all the buffered
1922          * data in skb's.
1923          */
1924         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
1925         set_bit(QCA_IBS_DISABLED, &qca->flags);
1926         qca_flush(hu);
1927         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
1928
1929         /* Non-serdev device usually is powered by external power
1930          * and don't need additional action in driver for power down
1931          */
1932         if (!hu->serdev)
1933                 return;
1934
1935         qcadev = serdev_device_get_drvdata(hu->serdev);
1936
1937         if (qca_is_wcn399x(soc_type)) {
1938                 host_set_baudrate(hu, 2400);
1939                 qca_send_power_pulse(hu, false);
1940                 qca_regulator_disable(qcadev);
1941         } else if (soc_type == QCA_WCN6750 || soc_type == QCA_WCN6855) {
1942                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1943                 msleep(100);
1944                 qca_regulator_disable(qcadev);
1945                 if (qcadev->sw_ctrl) {
1946                         sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
1947                         bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
1948                 }
1949         } else if (qcadev->bt_en) {
1950                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1951         }
1952
1953         set_bit(QCA_BT_OFF, &qca->flags);
1954 }
1955
1956 static int qca_power_off(struct hci_dev *hdev)
1957 {
1958         struct hci_uart *hu = hci_get_drvdata(hdev);
1959         struct qca_data *qca = hu->priv;
1960         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1961
1962         hu->hdev->hw_error = NULL;
1963         hu->hdev->cmd_timeout = NULL;
1964
1965         del_timer_sync(&qca->wake_retrans_timer);
1966         del_timer_sync(&qca->tx_idle_timer);
1967
1968         /* Stop sending shutdown command if soc crashes. */
1969         if (soc_type != QCA_ROME
1970                 && qca->memdump_state == QCA_MEMDUMP_IDLE) {
1971                 qca_send_pre_shutdown_cmd(hdev);
1972                 usleep_range(8000, 10000);
1973         }
1974
1975         qca_power_shutdown(hu);
1976         return 0;
1977 }
1978
1979 static int qca_regulator_enable(struct qca_serdev *qcadev)
1980 {
1981         struct qca_power *power = qcadev->bt_power;
1982         int ret;
1983
1984         /* Already enabled */
1985         if (power->vregs_on)
1986                 return 0;
1987
1988         BT_DBG("enabling %d regulators)", power->num_vregs);
1989
1990         ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk);
1991         if (ret)
1992                 return ret;
1993
1994         power->vregs_on = true;
1995
1996         ret = clk_prepare_enable(qcadev->susclk);
1997         if (ret)
1998                 qca_regulator_disable(qcadev);
1999
2000         return ret;
2001 }
2002
2003 static void qca_regulator_disable(struct qca_serdev *qcadev)
2004 {
2005         struct qca_power *power;
2006
2007         if (!qcadev)
2008                 return;
2009
2010         power = qcadev->bt_power;
2011
2012         /* Already disabled? */
2013         if (!power->vregs_on)
2014                 return;
2015
2016         regulator_bulk_disable(power->num_vregs, power->vreg_bulk);
2017         power->vregs_on = false;
2018
2019         clk_disable_unprepare(qcadev->susclk);
2020 }
2021
2022 static int qca_init_regulators(struct qca_power *qca,
2023                                 const struct qca_vreg *vregs, size_t num_vregs)
2024 {
2025         struct regulator_bulk_data *bulk;
2026         int ret;
2027         int i;
2028
2029         bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL);
2030         if (!bulk)
2031                 return -ENOMEM;
2032
2033         for (i = 0; i < num_vregs; i++)
2034                 bulk[i].supply = vregs[i].name;
2035
2036         ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk);
2037         if (ret < 0)
2038                 return ret;
2039
2040         for (i = 0; i < num_vregs; i++) {
2041                 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA);
2042                 if (ret)
2043                         return ret;
2044         }
2045
2046         qca->vreg_bulk = bulk;
2047         qca->num_vregs = num_vregs;
2048
2049         return 0;
2050 }
2051
2052 static int qca_serdev_probe(struct serdev_device *serdev)
2053 {
2054         struct qca_serdev *qcadev;
2055         struct hci_dev *hdev;
2056         const struct qca_device_data *data;
2057         int err;
2058         bool power_ctrl_enabled = true;
2059
2060         qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
2061         if (!qcadev)
2062                 return -ENOMEM;
2063
2064         qcadev->serdev_hu.serdev = serdev;
2065         data = device_get_match_data(&serdev->dev);
2066         serdev_device_set_drvdata(serdev, qcadev);
2067         device_property_read_string(&serdev->dev, "firmware-name",
2068                                          &qcadev->firmware_name);
2069         device_property_read_u32(&serdev->dev, "max-speed",
2070                                  &qcadev->oper_speed);
2071         if (!qcadev->oper_speed)
2072                 BT_DBG("UART will pick default operating speed");
2073
2074         if (data &&
2075             (qca_is_wcn399x(data->soc_type) ||
2076              qca_is_wcn6750(data->soc_type) ||
2077              qca_is_wcn6855(data->soc_type))) {
2078                 qcadev->btsoc_type = data->soc_type;
2079                 qcadev->bt_power = devm_kzalloc(&serdev->dev,
2080                                                 sizeof(struct qca_power),
2081                                                 GFP_KERNEL);
2082                 if (!qcadev->bt_power)
2083                         return -ENOMEM;
2084
2085                 qcadev->bt_power->dev = &serdev->dev;
2086                 err = qca_init_regulators(qcadev->bt_power, data->vregs,
2087                                           data->num_vregs);
2088                 if (err) {
2089                         BT_ERR("Failed to init regulators:%d", err);
2090                         return err;
2091                 }
2092
2093                 qcadev->bt_power->vregs_on = false;
2094
2095                 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2096                                                GPIOD_OUT_LOW);
2097                 if (IS_ERR_OR_NULL(qcadev->bt_en) &&
2098                     (data->soc_type == QCA_WCN6750 ||
2099                      data->soc_type == QCA_WCN6855)) {
2100                         dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");
2101                         power_ctrl_enabled = false;
2102                 }
2103
2104                 qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
2105                                                GPIOD_IN);
2106                 if (IS_ERR_OR_NULL(qcadev->sw_ctrl) &&
2107                     (data->soc_type == QCA_WCN6750 ||
2108                      data->soc_type == QCA_WCN6855))
2109                         dev_warn(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
2110
2111                 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2112                 if (IS_ERR(qcadev->susclk)) {
2113                         dev_err(&serdev->dev, "failed to acquire clk\n");
2114                         return PTR_ERR(qcadev->susclk);
2115                 }
2116
2117                 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2118                 if (err) {
2119                         BT_ERR("wcn3990 serdev registration failed");
2120                         return err;
2121                 }
2122         } else {
2123                 if (data)
2124                         qcadev->btsoc_type = data->soc_type;
2125                 else
2126                         qcadev->btsoc_type = QCA_ROME;
2127
2128                 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2129                                                GPIOD_OUT_LOW);
2130                 if (IS_ERR_OR_NULL(qcadev->bt_en)) {
2131                         dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
2132                         power_ctrl_enabled = false;
2133                 }
2134
2135                 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2136                 if (IS_ERR(qcadev->susclk)) {
2137                         dev_warn(&serdev->dev, "failed to acquire clk\n");
2138                         return PTR_ERR(qcadev->susclk);
2139                 }
2140                 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
2141                 if (err)
2142                         return err;
2143
2144                 err = clk_prepare_enable(qcadev->susclk);
2145                 if (err)
2146                         return err;
2147
2148                 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2149                 if (err) {
2150                         BT_ERR("Rome serdev registration failed");
2151                         clk_disable_unprepare(qcadev->susclk);
2152                         return err;
2153                 }
2154         }
2155
2156         hdev = qcadev->serdev_hu.hdev;
2157
2158         if (power_ctrl_enabled) {
2159                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
2160                 hdev->shutdown = qca_power_off;
2161         }
2162
2163         if (data) {
2164                 /* Wideband speech support must be set per driver since it can't
2165                  * be queried via hci. Same with the valid le states quirk.
2166                  */
2167                 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH)
2168                         set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
2169                                 &hdev->quirks);
2170
2171                 if (data->capabilities & QCA_CAP_VALID_LE_STATES)
2172                         set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
2173         }
2174
2175         return 0;
2176 }
2177
2178 static void qca_serdev_remove(struct serdev_device *serdev)
2179 {
2180         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2181         struct qca_power *power = qcadev->bt_power;
2182
2183         if ((qca_is_wcn399x(qcadev->btsoc_type) ||
2184              qca_is_wcn6750(qcadev->btsoc_type) ||
2185              qca_is_wcn6855(qcadev->btsoc_type)) &&
2186             power->vregs_on)
2187                 qca_power_shutdown(&qcadev->serdev_hu);
2188         else if (qcadev->susclk)
2189                 clk_disable_unprepare(qcadev->susclk);
2190
2191         hci_uart_unregister_device(&qcadev->serdev_hu);
2192 }
2193
2194 static void qca_serdev_shutdown(struct device *dev)
2195 {
2196         int ret;
2197         int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
2198         struct serdev_device *serdev = to_serdev_device(dev);
2199         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2200         struct hci_uart *hu = &qcadev->serdev_hu;
2201         struct hci_dev *hdev = hu->hdev;
2202         struct qca_data *qca = hu->priv;
2203         const u8 ibs_wake_cmd[] = { 0xFD };
2204         const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
2205
2206         if (qcadev->btsoc_type == QCA_QCA6390) {
2207                 if (test_bit(QCA_BT_OFF, &qca->flags) ||
2208                     !test_bit(HCI_RUNNING, &hdev->flags))
2209                         return;
2210
2211                 serdev_device_write_flush(serdev);
2212                 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,
2213                                               sizeof(ibs_wake_cmd));
2214                 if (ret < 0) {
2215                         BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);
2216                         return;
2217                 }
2218                 serdev_device_wait_until_sent(serdev, timeout);
2219                 usleep_range(8000, 10000);
2220
2221                 serdev_device_write_flush(serdev);
2222                 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd,
2223                                               sizeof(edl_reset_soc_cmd));
2224                 if (ret < 0) {
2225                         BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
2226                         return;
2227                 }
2228                 serdev_device_wait_until_sent(serdev, timeout);
2229                 usleep_range(8000, 10000);
2230         }
2231 }
2232
2233 static int __maybe_unused qca_suspend(struct device *dev)
2234 {
2235         struct serdev_device *serdev = to_serdev_device(dev);
2236         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2237         struct hci_uart *hu = &qcadev->serdev_hu;
2238         struct qca_data *qca = hu->priv;
2239         unsigned long flags;
2240         bool tx_pending = false;
2241         int ret = 0;
2242         u8 cmd;
2243         u32 wait_timeout = 0;
2244
2245         set_bit(QCA_SUSPENDING, &qca->flags);
2246
2247         /* if BT SoC is running with default firmware then it does not
2248          * support in-band sleep
2249          */
2250         if (test_bit(QCA_ROM_FW, &qca->flags))
2251                 return 0;
2252
2253         /* During SSR after memory dump collection, controller will be
2254          * powered off and then powered on.If controller is powered off
2255          * during SSR then we should wait until SSR is completed.
2256          */
2257         if (test_bit(QCA_BT_OFF, &qca->flags) &&
2258             !test_bit(QCA_SSR_TRIGGERED, &qca->flags))
2259                 return 0;
2260
2261         if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
2262             test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
2263                 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ?
2264                                         IBS_DISABLE_SSR_TIMEOUT_MS :
2265                                         FW_DOWNLOAD_TIMEOUT_MS;
2266
2267                 /* QCA_IBS_DISABLED flag is set to true, During FW download
2268                  * and during memory dump collection. It is reset to false,
2269                  * After FW download complete.
2270                  */
2271                 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED,
2272                             TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout));
2273
2274                 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) {
2275                         bt_dev_err(hu->hdev, "SSR or FW download time out");
2276                         ret = -ETIMEDOUT;
2277                         goto error;
2278                 }
2279         }
2280
2281         cancel_work_sync(&qca->ws_awake_device);
2282         cancel_work_sync(&qca->ws_awake_rx);
2283
2284         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
2285                                  flags, SINGLE_DEPTH_NESTING);
2286
2287         switch (qca->tx_ibs_state) {
2288         case HCI_IBS_TX_WAKING:
2289                 del_timer(&qca->wake_retrans_timer);
2290                 fallthrough;
2291         case HCI_IBS_TX_AWAKE:
2292                 del_timer(&qca->tx_idle_timer);
2293
2294                 serdev_device_write_flush(hu->serdev);
2295                 cmd = HCI_IBS_SLEEP_IND;
2296                 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
2297
2298                 if (ret < 0) {
2299                         BT_ERR("Failed to send SLEEP to device");
2300                         break;
2301                 }
2302
2303                 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
2304                 qca->ibs_sent_slps++;
2305                 tx_pending = true;
2306                 break;
2307
2308         case HCI_IBS_TX_ASLEEP:
2309                 break;
2310
2311         default:
2312                 BT_ERR("Spurious tx state %d", qca->tx_ibs_state);
2313                 ret = -EINVAL;
2314                 break;
2315         }
2316
2317         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
2318
2319         if (ret < 0)
2320                 goto error;
2321
2322         if (tx_pending) {
2323                 serdev_device_wait_until_sent(hu->serdev,
2324                                               msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
2325                 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
2326         }
2327
2328         /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going
2329          * to sleep, so that the packet does not wake the system later.
2330          */
2331         ret = wait_event_interruptible_timeout(qca->suspend_wait_q,
2332                         qca->rx_ibs_state == HCI_IBS_RX_ASLEEP,
2333                         msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS));
2334         if (ret == 0) {
2335                 ret = -ETIMEDOUT;
2336                 goto error;
2337         }
2338
2339         return 0;
2340
2341 error:
2342         clear_bit(QCA_SUSPENDING, &qca->flags);
2343
2344         return ret;
2345 }
2346
2347 static int __maybe_unused qca_resume(struct device *dev)
2348 {
2349         struct serdev_device *serdev = to_serdev_device(dev);
2350         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2351         struct hci_uart *hu = &qcadev->serdev_hu;
2352         struct qca_data *qca = hu->priv;
2353
2354         clear_bit(QCA_SUSPENDING, &qca->flags);
2355
2356         return 0;
2357 }
2358
2359 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume);
2360
2361 #ifdef CONFIG_OF
2362 static const struct of_device_id qca_bluetooth_of_match[] = {
2363         { .compatible = "qcom,qca6174-bt" },
2364         { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},
2365         { .compatible = "qcom,qca9377-bt" },
2366         { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},
2367         { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},
2368         { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},
2369         { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750},
2370         { .compatible = "qcom,wcn6855-bt", .data = &qca_soc_data_wcn6855},
2371         { /* sentinel */ }
2372 };
2373 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
2374 #endif
2375
2376 #ifdef CONFIG_ACPI
2377 static const struct acpi_device_id qca_bluetooth_acpi_match[] = {
2378         { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2379         { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2380         { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2381         { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2382         { },
2383 };
2384 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match);
2385 #endif
2386
2387
2388 static struct serdev_device_driver qca_serdev_driver = {
2389         .probe = qca_serdev_probe,
2390         .remove = qca_serdev_remove,
2391         .driver = {
2392                 .name = "hci_uart_qca",
2393                 .of_match_table = of_match_ptr(qca_bluetooth_of_match),
2394                 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
2395                 .shutdown = qca_serdev_shutdown,
2396                 .pm = &qca_pm_ops,
2397         },
2398 };
2399
2400 int __init qca_init(void)
2401 {
2402         serdev_device_driver_register(&qca_serdev_driver);
2403
2404         return hci_uart_register_proto(&qca_proto);
2405 }
2406
2407 int __exit qca_deinit(void)
2408 {
2409         serdev_device_driver_unregister(&qca_serdev_driver);
2410
2411         return hci_uart_unregister_proto(&qca_proto);
2412 }