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 <ohad@bencohen.org>
  14  *  which was in turn based on hci_h4.c, which was written
  15  *  by Maxim Krasnyansky and Marcel Holtmann.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/clk.h>
  20 #include <linux/completion.h>
  21 #include <linux/debugfs.h>
  22 #include <linux/delay.h>
  23 #include <linux/devcoredump.h>
  24 #include <linux/device.h>
  25 #include <linux/gpio/consumer.h>
  26 #include <linux/mod_devicetable.h>
  27 #include <linux/module.h>
  28 #include <linux/of.h>
  29 #include <linux/acpi.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/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_info {
 121         u32 current_seq_no;
 122         u32 received_dump;
 123         u32 ram_dump_size;
 124 };
 125
 126 struct qca_memdump_event_hdr {
 127         __u8    evt;
 128         __u8    plen;
 129         __u16   opcode;
 130         __le16   seq_no;
 131         __u8    reserved;
 132 } __packed;
 133
 134
 135 struct qca_dump_size {
 136         __le32 dump_size;
 137 } __packed;
 138
 139 struct qca_data {
 140         struct hci_uart *hu;
 141         struct sk_buff *rx_skb;
 142         struct sk_buff_head txq;
 143         struct sk_buff_head tx_wait_q;  /* HCI_IBS wait queue   */
 144         struct sk_buff_head rx_memdump_q;       /* Memdump wait queue   */
 145         spinlock_t hci_ibs_lock;        /* HCI_IBS state lock   */
 146         u8 tx_ibs_state;        /* HCI_IBS transmit side power state*/
 147         u8 rx_ibs_state;        /* HCI_IBS receive side power state */
 148         bool tx_vote;           /* Clock must be on for TX */
 149         bool rx_vote;           /* Clock must be on for RX */
 150         struct timer_list tx_idle_timer;
 151         u32 tx_idle_delay;
 152         struct timer_list wake_retrans_timer;
 153         u32 wake_retrans;
 154         struct workqueue_struct *workqueue;
 155         struct work_struct ws_awake_rx;
 156         struct work_struct ws_awake_device;
 157         struct work_struct ws_rx_vote_off;
 158         struct work_struct ws_tx_vote_off;
 159         struct work_struct ctrl_memdump_evt;
 160         struct delayed_work ctrl_memdump_timeout;
 161         struct qca_memdump_info *qca_memdump;
 162         unsigned long flags;
 163         struct completion drop_ev_comp;
 164         wait_queue_head_t suspend_wait_q;
 165         enum qca_memdump_states memdump_state;
 166         struct mutex hci_memdump_lock;
 167
 168         u16 fw_version;
 169         u16 controller_id;
 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         bool bdaddr_property_broken;
 229         const char *firmware_name;
 230 };
 231
 232 static int qca_regulator_enable(struct qca_serdev *qcadev);
 233 static void qca_regulator_disable(struct qca_serdev *qcadev);
 234 static void qca_power_shutdown(struct hci_uart *hu);
 235 static int qca_power_off(struct hci_dev *hdev);
 236 static void qca_controller_memdump(struct work_struct *work);
 237 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb);
 238
 239 static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
 240 {
 241         enum qca_btsoc_type soc_type;
 242
 243         if (hu->serdev) {
 244                 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
 245
 246                 soc_type = qsd->btsoc_type;
 247         } else {
 248                 soc_type = QCA_ROME;
 249         }
 250
 251         return soc_type;
 252 }
 253
 254 static const char *qca_get_firmware_name(struct hci_uart *hu)
 255 {
 256         if (hu->serdev) {
 257                 struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
 258
 259                 return qsd->firmware_name;
 260         } else {
 261                 return NULL;
 262         }
 263 }
 264
 265 static void __serial_clock_on(struct tty_struct *tty)
 266 {
 267         /* TODO: Some chipset requires to enable UART clock on client
 268          * side to save power consumption or manual work is required.
 269          * Please put your code to control UART clock here if needed
 270          */
 271 }
 272
 273 static void __serial_clock_off(struct tty_struct *tty)
 274 {
 275         /* TODO: Some chipset requires to disable UART clock on client
 276          * side to save power consumption or manual work is required.
 277          * Please put your code to control UART clock off here if needed
 278          */
 279 }
 280
 281 /* serial_clock_vote needs to be called with the ibs lock held */
 282 static void serial_clock_vote(unsigned long vote, struct hci_uart *hu)
 283 {
 284         struct qca_data *qca = hu->priv;
 285         unsigned int diff;
 286
 287         bool old_vote = (qca->tx_vote | qca->rx_vote);
 288         bool new_vote;
 289
 290         switch (vote) {
 291         case HCI_IBS_VOTE_STATS_UPDATE:
 292                 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
 293
 294                 if (old_vote)
 295                         qca->vote_off_ms += diff;
 296                 else
 297                         qca->vote_on_ms += diff;
 298                 return;
 299
 300         case HCI_IBS_TX_VOTE_CLOCK_ON:
 301                 qca->tx_vote = true;
 302                 qca->tx_votes_on++;
 303                 break;
 304
 305         case HCI_IBS_RX_VOTE_CLOCK_ON:
 306                 qca->rx_vote = true;
 307                 qca->rx_votes_on++;
 308                 break;
 309
 310         case HCI_IBS_TX_VOTE_CLOCK_OFF:
 311                 qca->tx_vote = false;
 312                 qca->tx_votes_off++;
 313                 break;
 314
 315         case HCI_IBS_RX_VOTE_CLOCK_OFF:
 316                 qca->rx_vote = false;
 317                 qca->rx_votes_off++;
 318                 break;
 319
 320         default:
 321                 BT_ERR("Voting irregularity");
 322                 return;
 323         }
 324
 325         new_vote = qca->rx_vote | qca->tx_vote;
 326
 327         if (new_vote != old_vote) {
 328                 if (new_vote)
 329                         __serial_clock_on(hu->tty);
 330                 else
 331                         __serial_clock_off(hu->tty);
 332
 333                 BT_DBG("Vote serial clock %s(%s)", new_vote ? "true" : "false",
 334                        vote ? "true" : "false");
 335
 336                 diff = jiffies_to_msecs(jiffies - qca->vote_last_jif);
 337
 338                 if (new_vote) {
 339                         qca->votes_on++;
 340                         qca->vote_off_ms += diff;
 341                 } else {
 342                         qca->votes_off++;
 343                         qca->vote_on_ms += diff;
 344                 }
 345                 qca->vote_last_jif = jiffies;
 346         }
 347 }
 348
 349 /* Builds and sends an HCI_IBS command packet.
 350  * These are very simple packets with only 1 cmd byte.
 351  */
 352 static int send_hci_ibs_cmd(u8 cmd, struct hci_uart *hu)
 353 {
 354         int err = 0;
 355         struct sk_buff *skb = NULL;
 356         struct qca_data *qca = hu->priv;
 357
 358         BT_DBG("hu %p send hci ibs cmd 0x%x", hu, cmd);
 359
 360         skb = bt_skb_alloc(1, GFP_ATOMIC);
 361         if (!skb) {
 362                 BT_ERR("Failed to allocate memory for HCI_IBS packet");
 363                 return -ENOMEM;
 364         }
 365
 366         /* Assign HCI_IBS type */
 367         skb_put_u8(skb, cmd);
 368
 369         skb_queue_tail(&qca->txq, skb);
 370
 371         return err;
 372 }
 373
 374 static void qca_wq_awake_device(struct work_struct *work)
 375 {
 376         struct qca_data *qca = container_of(work, struct qca_data,
 377                                             ws_awake_device);
 378         struct hci_uart *hu = qca->hu;
 379         unsigned long retrans_delay;
 380         unsigned long flags;
 381
 382         BT_DBG("hu %p wq awake device", hu);
 383
 384         /* Vote for serial clock */
 385         serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_ON, hu);
 386
 387         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 388
 389         /* Send wake indication to device */
 390         if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0)
 391                 BT_ERR("Failed to send WAKE to device");
 392
 393         qca->ibs_sent_wakes++;
 394
 395         /* Start retransmit timer */
 396         retrans_delay = msecs_to_jiffies(qca->wake_retrans);
 397         mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
 398
 399         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 400
 401         /* Actually send the packets */
 402         hci_uart_tx_wakeup(hu);
 403 }
 404
 405 static void qca_wq_awake_rx(struct work_struct *work)
 406 {
 407         struct qca_data *qca = container_of(work, struct qca_data,
 408                                             ws_awake_rx);
 409         struct hci_uart *hu = qca->hu;
 410         unsigned long flags;
 411
 412         BT_DBG("hu %p wq awake rx", hu);
 413
 414         serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_ON, hu);
 415
 416         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 417         qca->rx_ibs_state = HCI_IBS_RX_AWAKE;
 418
 419         /* Always acknowledge device wake up,
 420          * sending IBS message doesn't count as TX ON.
 421          */
 422         if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0)
 423                 BT_ERR("Failed to acknowledge device wake up");
 424
 425         qca->ibs_sent_wacks++;
 426
 427         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 428
 429         /* Actually send the packets */
 430         hci_uart_tx_wakeup(hu);
 431 }
 432
 433 static void qca_wq_serial_rx_clock_vote_off(struct work_struct *work)
 434 {
 435         struct qca_data *qca = container_of(work, struct qca_data,
 436                                             ws_rx_vote_off);
 437         struct hci_uart *hu = qca->hu;
 438
 439         BT_DBG("hu %p rx clock vote off", hu);
 440
 441         serial_clock_vote(HCI_IBS_RX_VOTE_CLOCK_OFF, hu);
 442 }
 443
 444 static void qca_wq_serial_tx_clock_vote_off(struct work_struct *work)
 445 {
 446         struct qca_data *qca = container_of(work, struct qca_data,
 447                                             ws_tx_vote_off);
 448         struct hci_uart *hu = qca->hu;
 449
 450         BT_DBG("hu %p tx clock vote off", hu);
 451
 452         /* Run HCI tx handling unlocked */
 453         hci_uart_tx_wakeup(hu);
 454
 455         /* Now that message queued to tty driver, vote for tty clocks off.
 456          * It is up to the tty driver to pend the clocks off until tx done.
 457          */
 458         serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
 459 }
 460
 461 static void hci_ibs_tx_idle_timeout(struct timer_list *t)
 462 {
 463         struct qca_data *qca = from_timer(qca, t, tx_idle_timer);
 464         struct hci_uart *hu = qca->hu;
 465         unsigned long flags;
 466
 467         BT_DBG("hu %p idle timeout in %d state", hu, qca->tx_ibs_state);
 468
 469         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
 470                                  flags, SINGLE_DEPTH_NESTING);
 471
 472         switch (qca->tx_ibs_state) {
 473         case HCI_IBS_TX_AWAKE:
 474                 /* TX_IDLE, go to SLEEP */
 475                 if (send_hci_ibs_cmd(HCI_IBS_SLEEP_IND, hu) < 0) {
 476                         BT_ERR("Failed to send SLEEP to device");
 477                         break;
 478                 }
 479                 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
 480                 qca->ibs_sent_slps++;
 481                 queue_work(qca->workqueue, &qca->ws_tx_vote_off);
 482                 break;
 483
 484         case HCI_IBS_TX_ASLEEP:
 485         case HCI_IBS_TX_WAKING:
 486         default:
 487                 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
 488                 break;
 489         }
 490
 491         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 492 }
 493
 494 static void hci_ibs_wake_retrans_timeout(struct timer_list *t)
 495 {
 496         struct qca_data *qca = from_timer(qca, t, wake_retrans_timer);
 497         struct hci_uart *hu = qca->hu;
 498         unsigned long flags, retrans_delay;
 499         bool retransmit = false;
 500
 501         BT_DBG("hu %p wake retransmit timeout in %d state",
 502                 hu, qca->tx_ibs_state);
 503
 504         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
 505                                  flags, SINGLE_DEPTH_NESTING);
 506
 507         /* Don't retransmit the HCI_IBS_WAKE_IND when suspending. */
 508         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 509                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 510                 return;
 511         }
 512
 513         switch (qca->tx_ibs_state) {
 514         case HCI_IBS_TX_WAKING:
 515                 /* No WAKE_ACK, retransmit WAKE */
 516                 retransmit = true;
 517                 if (send_hci_ibs_cmd(HCI_IBS_WAKE_IND, hu) < 0) {
 518                         BT_ERR("Failed to acknowledge device wake up");
 519                         break;
 520                 }
 521                 qca->ibs_sent_wakes++;
 522                 retrans_delay = msecs_to_jiffies(qca->wake_retrans);
 523                 mod_timer(&qca->wake_retrans_timer, jiffies + retrans_delay);
 524                 break;
 525
 526         case HCI_IBS_TX_ASLEEP:
 527         case HCI_IBS_TX_AWAKE:
 528         default:
 529                 BT_ERR("Spurious timeout tx state %d", qca->tx_ibs_state);
 530                 break;
 531         }
 532
 533         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 534
 535         if (retransmit)
 536                 hci_uart_tx_wakeup(hu);
 537 }
 538
 539
 540 static void qca_controller_memdump_timeout(struct work_struct *work)
 541 {
 542         struct qca_data *qca = container_of(work, struct qca_data,
 543                                         ctrl_memdump_timeout.work);
 544         struct hci_uart *hu = qca->hu;
 545
 546         mutex_lock(&qca->hci_memdump_lock);
 547         if (test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {
 548                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
 549                 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
 550                         /* Inject hw error event to reset the device
 551                          * and driver.
 552                          */
 553                         hci_reset_dev(hu->hdev);
 554                 }
 555         }
 556
 557         mutex_unlock(&qca->hci_memdump_lock);
 558 }
 559
 560
 561 /* Initialize protocol */
 562 static int qca_open(struct hci_uart *hu)
 563 {
 564         struct qca_serdev *qcadev;
 565         struct qca_data *qca;
 566
 567         BT_DBG("hu %p qca_open", hu);
 568
 569         if (!hci_uart_has_flow_control(hu))
 570                 return -EOPNOTSUPP;
 571
 572         qca = kzalloc(sizeof(struct qca_data), GFP_KERNEL);
 573         if (!qca)
 574                 return -ENOMEM;
 575
 576         skb_queue_head_init(&qca->txq);
 577         skb_queue_head_init(&qca->tx_wait_q);
 578         skb_queue_head_init(&qca->rx_memdump_q);
 579         spin_lock_init(&qca->hci_ibs_lock);
 580         mutex_init(&qca->hci_memdump_lock);
 581         qca->workqueue = alloc_ordered_workqueue("qca_wq", 0);
 582         if (!qca->workqueue) {
 583                 BT_ERR("QCA Workqueue not initialized properly");
 584                 kfree(qca);
 585                 return -ENOMEM;
 586         }
 587
 588         INIT_WORK(&qca->ws_awake_rx, qca_wq_awake_rx);
 589         INIT_WORK(&qca->ws_awake_device, qca_wq_awake_device);
 590         INIT_WORK(&qca->ws_rx_vote_off, qca_wq_serial_rx_clock_vote_off);
 591         INIT_WORK(&qca->ws_tx_vote_off, qca_wq_serial_tx_clock_vote_off);
 592         INIT_WORK(&qca->ctrl_memdump_evt, qca_controller_memdump);
 593         INIT_DELAYED_WORK(&qca->ctrl_memdump_timeout,
 594                           qca_controller_memdump_timeout);
 595         init_waitqueue_head(&qca->suspend_wait_q);
 596
 597         qca->hu = hu;
 598         init_completion(&qca->drop_ev_comp);
 599
 600         /* Assume we start with both sides asleep -- extra wakes OK */
 601         qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
 602         qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
 603
 604         qca->vote_last_jif = jiffies;
 605
 606         hu->priv = qca;
 607
 608         if (hu->serdev) {
 609                 qcadev = serdev_device_get_drvdata(hu->serdev);
 610
 611                 switch (qcadev->btsoc_type) {
 612                 case QCA_WCN3988:
 613                 case QCA_WCN3990:
 614                 case QCA_WCN3991:
 615                 case QCA_WCN3998:
 616                 case QCA_WCN6750:
 617                         hu->init_speed = qcadev->init_speed;
 618                         break;
 619
 620                 default:
 621                         break;
 622                 }
 623
 624                 if (qcadev->oper_speed)
 625                         hu->oper_speed = qcadev->oper_speed;
 626         }
 627
 628         timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
 629         qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
 630
 631         timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
 632         qca->tx_idle_delay = IBS_HOST_TX_IDLE_TIMEOUT_MS;
 633
 634         BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
 635                qca->tx_idle_delay, qca->wake_retrans);
 636
 637         return 0;
 638 }
 639
 640 static void qca_debugfs_init(struct hci_dev *hdev)
 641 {
 642         struct hci_uart *hu = hci_get_drvdata(hdev);
 643         struct qca_data *qca = hu->priv;
 644         struct dentry *ibs_dir;
 645         umode_t mode;
 646
 647         if (!hdev->debugfs)
 648                 return;
 649
 650         if (test_and_set_bit(QCA_DEBUGFS_CREATED, &qca->flags))
 651                 return;
 652
 653         ibs_dir = debugfs_create_dir("ibs", hdev->debugfs);
 654
 655         /* read only */
 656         mode = 0444;
 657         debugfs_create_u8("tx_ibs_state", mode, ibs_dir, &qca->tx_ibs_state);
 658         debugfs_create_u8("rx_ibs_state", mode, ibs_dir, &qca->rx_ibs_state);
 659         debugfs_create_u64("ibs_sent_sleeps", mode, ibs_dir,
 660                            &qca->ibs_sent_slps);
 661         debugfs_create_u64("ibs_sent_wakes", mode, ibs_dir,
 662                            &qca->ibs_sent_wakes);
 663         debugfs_create_u64("ibs_sent_wake_acks", mode, ibs_dir,
 664                            &qca->ibs_sent_wacks);
 665         debugfs_create_u64("ibs_recv_sleeps", mode, ibs_dir,
 666                            &qca->ibs_recv_slps);
 667         debugfs_create_u64("ibs_recv_wakes", mode, ibs_dir,
 668                            &qca->ibs_recv_wakes);
 669         debugfs_create_u64("ibs_recv_wake_acks", mode, ibs_dir,
 670                            &qca->ibs_recv_wacks);
 671         debugfs_create_bool("tx_vote", mode, ibs_dir, &qca->tx_vote);
 672         debugfs_create_u64("tx_votes_on", mode, ibs_dir, &qca->tx_votes_on);
 673         debugfs_create_u64("tx_votes_off", mode, ibs_dir, &qca->tx_votes_off);
 674         debugfs_create_bool("rx_vote", mode, ibs_dir, &qca->rx_vote);
 675         debugfs_create_u64("rx_votes_on", mode, ibs_dir, &qca->rx_votes_on);
 676         debugfs_create_u64("rx_votes_off", mode, ibs_dir, &qca->rx_votes_off);
 677         debugfs_create_u64("votes_on", mode, ibs_dir, &qca->votes_on);
 678         debugfs_create_u64("votes_off", mode, ibs_dir, &qca->votes_off);
 679         debugfs_create_u32("vote_on_ms", mode, ibs_dir, &qca->vote_on_ms);
 680         debugfs_create_u32("vote_off_ms", mode, ibs_dir, &qca->vote_off_ms);
 681
 682         /* read/write */
 683         mode = 0644;
 684         debugfs_create_u32("wake_retrans", mode, ibs_dir, &qca->wake_retrans);
 685         debugfs_create_u32("tx_idle_delay", mode, ibs_dir,
 686                            &qca->tx_idle_delay);
 687 }
 688
 689 /* Flush protocol data */
 690 static int qca_flush(struct hci_uart *hu)
 691 {
 692         struct qca_data *qca = hu->priv;
 693
 694         BT_DBG("hu %p qca flush", hu);
 695
 696         skb_queue_purge(&qca->tx_wait_q);
 697         skb_queue_purge(&qca->txq);
 698
 699         return 0;
 700 }
 701
 702 /* Close protocol */
 703 static int qca_close(struct hci_uart *hu)
 704 {
 705         struct qca_data *qca = hu->priv;
 706
 707         BT_DBG("hu %p qca close", hu);
 708
 709         serial_clock_vote(HCI_IBS_VOTE_STATS_UPDATE, hu);
 710
 711         skb_queue_purge(&qca->tx_wait_q);
 712         skb_queue_purge(&qca->txq);
 713         skb_queue_purge(&qca->rx_memdump_q);
 714         /*
 715          * Shut the timers down so they can't be rearmed when
 716          * destroy_workqueue() drains pending work which in turn might try
 717          * to arm a timer.  After shutdown rearm attempts are silently
 718          * ignored by the timer core code.
 719          */
 720         timer_shutdown_sync(&qca->tx_idle_timer);
 721         timer_shutdown_sync(&qca->wake_retrans_timer);
 722         destroy_workqueue(qca->workqueue);
 723         qca->hu = NULL;
 724
 725         kfree_skb(qca->rx_skb);
 726
 727         hu->priv = NULL;
 728
 729         kfree(qca);
 730
 731         return 0;
 732 }
 733
 734 /* Called upon a wake-up-indication from the device.
 735  */
 736 static void device_want_to_wakeup(struct hci_uart *hu)
 737 {
 738         unsigned long flags;
 739         struct qca_data *qca = hu->priv;
 740
 741         BT_DBG("hu %p want to wake up", hu);
 742
 743         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 744
 745         qca->ibs_recv_wakes++;
 746
 747         /* Don't wake the rx up when suspending. */
 748         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 749                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 750                 return;
 751         }
 752
 753         switch (qca->rx_ibs_state) {
 754         case HCI_IBS_RX_ASLEEP:
 755                 /* Make sure clock is on - we may have turned clock off since
 756                  * receiving the wake up indicator awake rx clock.
 757                  */
 758                 queue_work(qca->workqueue, &qca->ws_awake_rx);
 759                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 760                 return;
 761
 762         case HCI_IBS_RX_AWAKE:
 763                 /* Always acknowledge device wake up,
 764                  * sending IBS message doesn't count as TX ON.
 765                  */
 766                 if (send_hci_ibs_cmd(HCI_IBS_WAKE_ACK, hu) < 0) {
 767                         BT_ERR("Failed to acknowledge device wake up");
 768                         break;
 769                 }
 770                 qca->ibs_sent_wacks++;
 771                 break;
 772
 773         default:
 774                 /* Any other state is illegal */
 775                 BT_ERR("Received HCI_IBS_WAKE_IND in rx state %d",
 776                        qca->rx_ibs_state);
 777                 break;
 778         }
 779
 780         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 781
 782         /* Actually send the packets */
 783         hci_uart_tx_wakeup(hu);
 784 }
 785
 786 /* Called upon a sleep-indication from the device.
 787  */
 788 static void device_want_to_sleep(struct hci_uart *hu)
 789 {
 790         unsigned long flags;
 791         struct qca_data *qca = hu->priv;
 792
 793         BT_DBG("hu %p want to sleep in %d state", hu, qca->rx_ibs_state);
 794
 795         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 796
 797         qca->ibs_recv_slps++;
 798
 799         switch (qca->rx_ibs_state) {
 800         case HCI_IBS_RX_AWAKE:
 801                 /* Update state */
 802                 qca->rx_ibs_state = HCI_IBS_RX_ASLEEP;
 803                 /* Vote off rx clock under workqueue */
 804                 queue_work(qca->workqueue, &qca->ws_rx_vote_off);
 805                 break;
 806
 807         case HCI_IBS_RX_ASLEEP:
 808                 break;
 809
 810         default:
 811                 /* Any other state is illegal */
 812                 BT_ERR("Received HCI_IBS_SLEEP_IND in rx state %d",
 813                        qca->rx_ibs_state);
 814                 break;
 815         }
 816
 817         wake_up_interruptible(&qca->suspend_wait_q);
 818
 819         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 820 }
 821
 822 /* Called upon wake-up-acknowledgement from the device
 823  */
 824 static void device_woke_up(struct hci_uart *hu)
 825 {
 826         unsigned long flags, idle_delay;
 827         struct qca_data *qca = hu->priv;
 828         struct sk_buff *skb = NULL;
 829
 830         BT_DBG("hu %p woke up", hu);
 831
 832         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 833
 834         qca->ibs_recv_wacks++;
 835
 836         /* Don't react to the wake-up-acknowledgment when suspending. */
 837         if (test_bit(QCA_SUSPENDING, &qca->flags)) {
 838                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 839                 return;
 840         }
 841
 842         switch (qca->tx_ibs_state) {
 843         case HCI_IBS_TX_AWAKE:
 844                 /* Expect one if we send 2 WAKEs */
 845                 BT_DBG("Received HCI_IBS_WAKE_ACK in tx state %d",
 846                        qca->tx_ibs_state);
 847                 break;
 848
 849         case HCI_IBS_TX_WAKING:
 850                 /* Send pending packets */
 851                 while ((skb = skb_dequeue(&qca->tx_wait_q)))
 852                         skb_queue_tail(&qca->txq, skb);
 853
 854                 /* Switch timers and change state to HCI_IBS_TX_AWAKE */
 855                 del_timer(&qca->wake_retrans_timer);
 856                 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
 857                 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
 858                 qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
 859                 break;
 860
 861         case HCI_IBS_TX_ASLEEP:
 862         default:
 863                 BT_ERR("Received HCI_IBS_WAKE_ACK in tx state %d",
 864                        qca->tx_ibs_state);
 865                 break;
 866         }
 867
 868         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 869
 870         /* Actually send the packets */
 871         hci_uart_tx_wakeup(hu);
 872 }
 873
 874 /* Enqueue frame for transmittion (padding, crc, etc) may be called from
 875  * two simultaneous tasklets.
 876  */
 877 static int qca_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 878 {
 879         unsigned long flags = 0, idle_delay;
 880         struct qca_data *qca = hu->priv;
 881
 882         BT_DBG("hu %p qca enq skb %p tx_ibs_state %d", hu, skb,
 883                qca->tx_ibs_state);
 884
 885         if (test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
 886                 /* As SSR is in progress, ignore the packets */
 887                 bt_dev_dbg(hu->hdev, "SSR is in progress");
 888                 kfree_skb(skb);
 889                 return 0;
 890         }
 891
 892         /* Prepend skb with frame type */
 893         memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
 894
 895         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
 896
 897         /* Don't go to sleep in middle of patch download or
 898          * Out-Of-Band(GPIOs control) sleep is selected.
 899          * Don't wake the device up when suspending.
 900          */
 901         if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
 902             test_bit(QCA_SUSPENDING, &qca->flags)) {
 903                 skb_queue_tail(&qca->txq, skb);
 904                 spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 905                 return 0;
 906         }
 907
 908         /* Act according to current state */
 909         switch (qca->tx_ibs_state) {
 910         case HCI_IBS_TX_AWAKE:
 911                 BT_DBG("Device awake, sending normally");
 912                 skb_queue_tail(&qca->txq, skb);
 913                 idle_delay = msecs_to_jiffies(qca->tx_idle_delay);
 914                 mod_timer(&qca->tx_idle_timer, jiffies + idle_delay);
 915                 break;
 916
 917         case HCI_IBS_TX_ASLEEP:
 918                 BT_DBG("Device asleep, waking up and queueing packet");
 919                 /* Save packet for later */
 920                 skb_queue_tail(&qca->tx_wait_q, skb);
 921
 922                 qca->tx_ibs_state = HCI_IBS_TX_WAKING;
 923                 /* Schedule a work queue to wake up device */
 924                 queue_work(qca->workqueue, &qca->ws_awake_device);
 925                 break;
 926
 927         case HCI_IBS_TX_WAKING:
 928                 BT_DBG("Device waking up, queueing packet");
 929                 /* Transient state; just keep packet for later */
 930                 skb_queue_tail(&qca->tx_wait_q, skb);
 931                 break;
 932
 933         default:
 934                 BT_ERR("Illegal tx state: %d (losing packet)",
 935                        qca->tx_ibs_state);
 936                 dev_kfree_skb_irq(skb);
 937                 break;
 938         }
 939
 940         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
 941
 942         return 0;
 943 }
 944
 945 static int qca_ibs_sleep_ind(struct hci_dev *hdev, struct sk_buff *skb)
 946 {
 947         struct hci_uart *hu = hci_get_drvdata(hdev);
 948
 949         BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_SLEEP_IND);
 950
 951         device_want_to_sleep(hu);
 952
 953         kfree_skb(skb);
 954         return 0;
 955 }
 956
 957 static int qca_ibs_wake_ind(struct hci_dev *hdev, struct sk_buff *skb)
 958 {
 959         struct hci_uart *hu = hci_get_drvdata(hdev);
 960
 961         BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_IND);
 962
 963         device_want_to_wakeup(hu);
 964
 965         kfree_skb(skb);
 966         return 0;
 967 }
 968
 969 static int qca_ibs_wake_ack(struct hci_dev *hdev, struct sk_buff *skb)
 970 {
 971         struct hci_uart *hu = hci_get_drvdata(hdev);
 972
 973         BT_DBG("hu %p recv hci ibs cmd 0x%x", hu, HCI_IBS_WAKE_ACK);
 974
 975         device_woke_up(hu);
 976
 977         kfree_skb(skb);
 978         return 0;
 979 }
 980
 981 static int qca_recv_acl_data(struct hci_dev *hdev, struct sk_buff *skb)
 982 {
 983         /* We receive debug logs from chip as an ACL packets.
 984          * Instead of sending the data to ACL to decode the
 985          * received data, we are pushing them to the above layers
 986          * as a diagnostic packet.
 987          */
 988         if (get_unaligned_le16(skb->data) == QCA_DEBUG_HANDLE)
 989                 return hci_recv_diag(hdev, skb);
 990
 991         return hci_recv_frame(hdev, skb);
 992 }
 993
 994 static void qca_dmp_hdr(struct hci_dev *hdev, struct sk_buff *skb)
 995 {
 996         struct hci_uart *hu = hci_get_drvdata(hdev);
 997         struct qca_data *qca = hu->priv;
 998         char buf[80];
 999
1000         snprintf(buf, sizeof(buf), "Controller Name: 0x%x\n",
1001                 qca->controller_id);
1002         skb_put_data(skb, buf, strlen(buf));
1003
1004         snprintf(buf, sizeof(buf), "Firmware Version: 0x%x\n",
1005                 qca->fw_version);
1006         skb_put_data(skb, buf, strlen(buf));
1007
1008         snprintf(buf, sizeof(buf), "Vendor:Qualcomm\n");
1009         skb_put_data(skb, buf, strlen(buf));
1010
1011         snprintf(buf, sizeof(buf), "Driver: %s\n",
1012                 hu->serdev->dev.driver->name);
1013         skb_put_data(skb, buf, strlen(buf));
1014 }
1015
1016 static void qca_controller_memdump(struct work_struct *work)
1017 {
1018         struct qca_data *qca = container_of(work, struct qca_data,
1019                                             ctrl_memdump_evt);
1020         struct hci_uart *hu = qca->hu;
1021         struct sk_buff *skb;
1022         struct qca_memdump_event_hdr *cmd_hdr;
1023         struct qca_memdump_info *qca_memdump = qca->qca_memdump;
1024         struct qca_dump_size *dump;
1025         u16 seq_no;
1026         u32 rx_size;
1027         int ret = 0;
1028         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1029
1030         while ((skb = skb_dequeue(&qca->rx_memdump_q))) {
1031
1032                 mutex_lock(&qca->hci_memdump_lock);
1033                 /* Skip processing the received packets if timeout detected
1034                  * or memdump collection completed.
1035                  */
1036                 if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1037                     qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1038                         mutex_unlock(&qca->hci_memdump_lock);
1039                         return;
1040                 }
1041
1042                 if (!qca_memdump) {
1043                         qca_memdump = kzalloc(sizeof(struct qca_memdump_info),
1044                                               GFP_ATOMIC);
1045                         if (!qca_memdump) {
1046                                 mutex_unlock(&qca->hci_memdump_lock);
1047                                 return;
1048                         }
1049
1050                         qca->qca_memdump = qca_memdump;
1051                 }
1052
1053                 qca->memdump_state = QCA_MEMDUMP_COLLECTING;
1054                 cmd_hdr = (void *) skb->data;
1055                 seq_no = __le16_to_cpu(cmd_hdr->seq_no);
1056                 skb_pull(skb, sizeof(struct qca_memdump_event_hdr));
1057
1058                 if (!seq_no) {
1059
1060                         /* This is the first frame of memdump packet from
1061                          * the controller, Disable IBS to recevie dump
1062                          * with out any interruption, ideally time required for
1063                          * the controller to send the dump is 8 seconds. let us
1064                          * start timer to handle this asynchronous activity.
1065                          */
1066                         set_bit(QCA_IBS_DISABLED, &qca->flags);
1067                         set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1068                         dump = (void *) skb->data;
1069                         qca_memdump->ram_dump_size = __le32_to_cpu(dump->dump_size);
1070                         if (!(qca_memdump->ram_dump_size)) {
1071                                 bt_dev_err(hu->hdev, "Rx invalid memdump size");
1072                                 kfree(qca_memdump);
1073                                 kfree_skb(skb);
1074                                 mutex_unlock(&qca->hci_memdump_lock);
1075                                 return;
1076                         }
1077
1078                         queue_delayed_work(qca->workqueue,
1079                                            &qca->ctrl_memdump_timeout,
1080                                            msecs_to_jiffies(MEMDUMP_TIMEOUT_MS));
1081                         skb_pull(skb, sizeof(qca_memdump->ram_dump_size));
1082                         qca_memdump->current_seq_no = 0;
1083                         qca_memdump->received_dump = 0;
1084                         ret = hci_devcd_init(hu->hdev, qca_memdump->ram_dump_size);
1085                         bt_dev_info(hu->hdev, "hci_devcd_init Return:%d",
1086                                     ret);
1087                         if (ret < 0) {
1088                                 kfree(qca->qca_memdump);
1089                                 qca->qca_memdump = NULL;
1090                                 qca->memdump_state = QCA_MEMDUMP_COLLECTED;
1091                                 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1092                                 clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1093                                 mutex_unlock(&qca->hci_memdump_lock);
1094                                 return;
1095                         }
1096
1097                         bt_dev_info(hu->hdev, "QCA collecting dump of size:%u",
1098                                     qca_memdump->ram_dump_size);
1099
1100                 }
1101
1102                 /* If sequence no 0 is missed then there is no point in
1103                  * accepting the other sequences.
1104                  */
1105                 if (!test_bit(QCA_MEMDUMP_COLLECTION, &qca->flags)) {
1106                         bt_dev_err(hu->hdev, "QCA: Discarding other packets");
1107                         kfree(qca_memdump);
1108                         kfree_skb(skb);
1109                         mutex_unlock(&qca->hci_memdump_lock);
1110                         return;
1111                 }
1112                 /* There could be chance of missing some packets from
1113                  * the controller. In such cases let us store the dummy
1114                  * packets in the buffer.
1115                  */
1116                 /* For QCA6390, controller does not lost packets but
1117                  * sequence number field of packet sometimes has error
1118                  * bits, so skip this checking for missing packet.
1119                  */
1120                 while ((seq_no > qca_memdump->current_seq_no + 1) &&
1121                         (soc_type != QCA_QCA6390) &&
1122                         seq_no != QCA_LAST_SEQUENCE_NUM) {
1123                         bt_dev_err(hu->hdev, "QCA controller missed packet:%d",
1124                                    qca_memdump->current_seq_no);
1125                         rx_size = qca_memdump->received_dump;
1126                         rx_size += QCA_DUMP_PACKET_SIZE;
1127                         if (rx_size > qca_memdump->ram_dump_size) {
1128                                 bt_dev_err(hu->hdev,
1129                                            "QCA memdump received %d, no space for missed packet",
1130                                            qca_memdump->received_dump);
1131                                 break;
1132                         }
1133                         hci_devcd_append_pattern(hu->hdev, 0x00,
1134                                 QCA_DUMP_PACKET_SIZE);
1135                         qca_memdump->received_dump += QCA_DUMP_PACKET_SIZE;
1136                         qca_memdump->current_seq_no++;
1137                 }
1138
1139                 rx_size = qca_memdump->received_dump  + skb->len;
1140                 if (rx_size <= qca_memdump->ram_dump_size) {
1141                         if ((seq_no != QCA_LAST_SEQUENCE_NUM) &&
1142                             (seq_no != qca_memdump->current_seq_no)) {
1143                                 bt_dev_err(hu->hdev,
1144                                            "QCA memdump unexpected packet %d",
1145                                            seq_no);
1146                         }
1147                         bt_dev_dbg(hu->hdev,
1148                                    "QCA memdump packet %d with length %d",
1149                                    seq_no, skb->len);
1150                         hci_devcd_append(hu->hdev, skb);
1151                         qca_memdump->current_seq_no += 1;
1152                         qca_memdump->received_dump = rx_size;
1153                 } else {
1154                         bt_dev_err(hu->hdev,
1155                                    "QCA memdump received no space for packet %d",
1156                                     qca_memdump->current_seq_no);
1157                 }
1158
1159                 if (seq_no == QCA_LAST_SEQUENCE_NUM) {
1160                         bt_dev_info(hu->hdev,
1161                                 "QCA memdump Done, received %d, total %d",
1162                                 qca_memdump->received_dump,
1163                                 qca_memdump->ram_dump_size);
1164                         hci_devcd_complete(hu->hdev);
1165                         cancel_delayed_work(&qca->ctrl_memdump_timeout);
1166                         kfree(qca->qca_memdump);
1167                         qca->qca_memdump = NULL;
1168                         qca->memdump_state = QCA_MEMDUMP_COLLECTED;
1169                         clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1170                 }
1171
1172                 mutex_unlock(&qca->hci_memdump_lock);
1173         }
1174
1175 }
1176
1177 static int qca_controller_memdump_event(struct hci_dev *hdev,
1178                                         struct sk_buff *skb)
1179 {
1180         struct hci_uart *hu = hci_get_drvdata(hdev);
1181         struct qca_data *qca = hu->priv;
1182
1183         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1184         skb_queue_tail(&qca->rx_memdump_q, skb);
1185         queue_work(qca->workqueue, &qca->ctrl_memdump_evt);
1186
1187         return 0;
1188 }
1189
1190 static int qca_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
1191 {
1192         struct hci_uart *hu = hci_get_drvdata(hdev);
1193         struct qca_data *qca = hu->priv;
1194
1195         if (test_bit(QCA_DROP_VENDOR_EVENT, &qca->flags)) {
1196                 struct hci_event_hdr *hdr = (void *)skb->data;
1197
1198                 /* For the WCN3990 the vendor command for a baudrate change
1199                  * isn't sent as synchronous HCI command, because the
1200                  * controller sends the corresponding vendor event with the
1201                  * new baudrate. The event is received and properly decoded
1202                  * after changing the baudrate of the host port. It needs to
1203                  * be dropped, otherwise it can be misinterpreted as
1204                  * response to a later firmware download command (also a
1205                  * vendor command).
1206                  */
1207
1208                 if (hdr->evt == HCI_EV_VENDOR)
1209                         complete(&qca->drop_ev_comp);
1210
1211                 kfree_skb(skb);
1212
1213                 return 0;
1214         }
1215         /* We receive chip memory dump as an event packet, With a dedicated
1216          * handler followed by a hardware error event. When this event is
1217          * received we store dump into a file before closing hci. This
1218          * dump will help in triaging the issues.
1219          */
1220         if ((skb->data[0] == HCI_VENDOR_PKT) &&
1221             (get_unaligned_be16(skb->data + 2) == QCA_SSR_DUMP_HANDLE))
1222                 return qca_controller_memdump_event(hdev, skb);
1223
1224         return hci_recv_frame(hdev, skb);
1225 }
1226
1227 #define QCA_IBS_SLEEP_IND_EVENT \
1228         .type = HCI_IBS_SLEEP_IND, \
1229         .hlen = 0, \
1230         .loff = 0, \
1231         .lsize = 0, \
1232         .maxlen = HCI_MAX_IBS_SIZE
1233
1234 #define QCA_IBS_WAKE_IND_EVENT \
1235         .type = HCI_IBS_WAKE_IND, \
1236         .hlen = 0, \
1237         .loff = 0, \
1238         .lsize = 0, \
1239         .maxlen = HCI_MAX_IBS_SIZE
1240
1241 #define QCA_IBS_WAKE_ACK_EVENT \
1242         .type = HCI_IBS_WAKE_ACK, \
1243         .hlen = 0, \
1244         .loff = 0, \
1245         .lsize = 0, \
1246         .maxlen = HCI_MAX_IBS_SIZE
1247
1248 static const struct h4_recv_pkt qca_recv_pkts[] = {
1249         { H4_RECV_ACL,             .recv = qca_recv_acl_data },
1250         { H4_RECV_SCO,             .recv = hci_recv_frame    },
1251         { H4_RECV_EVENT,           .recv = qca_recv_event    },
1252         { QCA_IBS_WAKE_IND_EVENT,  .recv = qca_ibs_wake_ind  },
1253         { QCA_IBS_WAKE_ACK_EVENT,  .recv = qca_ibs_wake_ack  },
1254         { QCA_IBS_SLEEP_IND_EVENT, .recv = qca_ibs_sleep_ind },
1255 };
1256
1257 static int qca_recv(struct hci_uart *hu, const void *data, int count)
1258 {
1259         struct qca_data *qca = hu->priv;
1260
1261         if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
1262                 return -EUNATCH;
1263
1264         qca->rx_skb = h4_recv_buf(hu->hdev, qca->rx_skb, data, count,
1265                                   qca_recv_pkts, ARRAY_SIZE(qca_recv_pkts));
1266         if (IS_ERR(qca->rx_skb)) {
1267                 int err = PTR_ERR(qca->rx_skb);
1268                 bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
1269                 qca->rx_skb = NULL;
1270                 return err;
1271         }
1272
1273         return count;
1274 }
1275
1276 static struct sk_buff *qca_dequeue(struct hci_uart *hu)
1277 {
1278         struct qca_data *qca = hu->priv;
1279
1280         return skb_dequeue(&qca->txq);
1281 }
1282
1283 static uint8_t qca_get_baudrate_value(int speed)
1284 {
1285         switch (speed) {
1286         case 9600:
1287                 return QCA_BAUDRATE_9600;
1288         case 19200:
1289                 return QCA_BAUDRATE_19200;
1290         case 38400:
1291                 return QCA_BAUDRATE_38400;
1292         case 57600:
1293                 return QCA_BAUDRATE_57600;
1294         case 115200:
1295                 return QCA_BAUDRATE_115200;
1296         case 230400:
1297                 return QCA_BAUDRATE_230400;
1298         case 460800:
1299                 return QCA_BAUDRATE_460800;
1300         case 500000:
1301                 return QCA_BAUDRATE_500000;
1302         case 921600:
1303                 return QCA_BAUDRATE_921600;
1304         case 1000000:
1305                 return QCA_BAUDRATE_1000000;
1306         case 2000000:
1307                 return QCA_BAUDRATE_2000000;
1308         case 3000000:
1309                 return QCA_BAUDRATE_3000000;
1310         case 3200000:
1311                 return QCA_BAUDRATE_3200000;
1312         case 3500000:
1313                 return QCA_BAUDRATE_3500000;
1314         default:
1315                 return QCA_BAUDRATE_115200;
1316         }
1317 }
1318
1319 static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
1320 {
1321         struct hci_uart *hu = hci_get_drvdata(hdev);
1322         struct qca_data *qca = hu->priv;
1323         struct sk_buff *skb;
1324         u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };
1325
1326         if (baudrate > QCA_BAUDRATE_3200000)
1327                 return -EINVAL;
1328
1329         cmd[4] = baudrate;
1330
1331         skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
1332         if (!skb) {
1333                 bt_dev_err(hdev, "Failed to allocate baudrate packet");
1334                 return -ENOMEM;
1335         }
1336
1337         /* Assign commands to change baudrate and packet type. */
1338         skb_put_data(skb, cmd, sizeof(cmd));
1339         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1340
1341         skb_queue_tail(&qca->txq, skb);
1342         hci_uart_tx_wakeup(hu);
1343
1344         /* Wait for the baudrate change request to be sent */
1345
1346         while (!skb_queue_empty(&qca->txq))
1347                 usleep_range(100, 200);
1348
1349         if (hu->serdev)
1350                 serdev_device_wait_until_sent(hu->serdev,
1351                       msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
1352
1353         /* Give the controller time to process the request */
1354         switch (qca_soc_type(hu)) {
1355         case QCA_WCN3988:
1356         case QCA_WCN3990:
1357         case QCA_WCN3991:
1358         case QCA_WCN3998:
1359         case QCA_WCN6750:
1360         case QCA_WCN6855:
1361         case QCA_WCN7850:
1362                 usleep_range(1000, 10000);
1363                 break;
1364
1365         default:
1366                 msleep(300);
1367         }
1368
1369         return 0;
1370 }
1371
1372 static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
1373 {
1374         if (hu->serdev)
1375                 serdev_device_set_baudrate(hu->serdev, speed);
1376         else
1377                 hci_uart_set_baudrate(hu, speed);
1378 }
1379
1380 static int qca_send_power_pulse(struct hci_uart *hu, bool on)
1381 {
1382         int ret;
1383         int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
1384         u8 cmd = on ? QCA_WCN3990_POWERON_PULSE : QCA_WCN3990_POWEROFF_PULSE;
1385
1386         /* These power pulses are single byte command which are sent
1387          * at required baudrate to wcn3990. On wcn3990, we have an external
1388          * circuit at Tx pin which decodes the pulse sent at specific baudrate.
1389          * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
1390          * and also we use the same power inputs to turn on and off for
1391          * Wi-Fi/BT. Powering up the power sources will not enable BT, until
1392          * we send a power on pulse at 115200 bps. This algorithm will help to
1393          * save power. Disabling hardware flow control is mandatory while
1394          * sending power pulses to SoC.
1395          */
1396         bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);
1397
1398         serdev_device_write_flush(hu->serdev);
1399         hci_uart_set_flow_control(hu, true);
1400         ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
1401         if (ret < 0) {
1402                 bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);
1403                 return ret;
1404         }
1405
1406         serdev_device_wait_until_sent(hu->serdev, timeout);
1407         hci_uart_set_flow_control(hu, false);
1408
1409         /* Give to controller time to boot/shutdown */
1410         if (on)
1411                 msleep(100);
1412         else
1413                 usleep_range(1000, 10000);
1414
1415         return 0;
1416 }
1417
1418 static unsigned int qca_get_speed(struct hci_uart *hu,
1419                                   enum qca_speed_type speed_type)
1420 {
1421         unsigned int speed = 0;
1422
1423         if (speed_type == QCA_INIT_SPEED) {
1424                 if (hu->init_speed)
1425                         speed = hu->init_speed;
1426                 else if (hu->proto->init_speed)
1427                         speed = hu->proto->init_speed;
1428         } else {
1429                 if (hu->oper_speed)
1430                         speed = hu->oper_speed;
1431                 else if (hu->proto->oper_speed)
1432                         speed = hu->proto->oper_speed;
1433         }
1434
1435         return speed;
1436 }
1437
1438 static int qca_check_speeds(struct hci_uart *hu)
1439 {
1440         switch (qca_soc_type(hu)) {
1441         case QCA_WCN3988:
1442         case QCA_WCN3990:
1443         case QCA_WCN3991:
1444         case QCA_WCN3998:
1445         case QCA_WCN6750:
1446         case QCA_WCN6855:
1447         case QCA_WCN7850:
1448                 if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
1449                     !qca_get_speed(hu, QCA_OPER_SPEED))
1450                         return -EINVAL;
1451                 break;
1452
1453         default:
1454                 if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
1455                     !qca_get_speed(hu, QCA_OPER_SPEED))
1456                         return -EINVAL;
1457         }
1458
1459         return 0;
1460 }
1461
1462 static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
1463 {
1464         unsigned int speed, qca_baudrate;
1465         struct qca_data *qca = hu->priv;
1466         int ret = 0;
1467
1468         if (speed_type == QCA_INIT_SPEED) {
1469                 speed = qca_get_speed(hu, QCA_INIT_SPEED);
1470                 if (speed)
1471                         host_set_baudrate(hu, speed);
1472         } else {
1473                 enum qca_btsoc_type soc_type = qca_soc_type(hu);
1474
1475                 speed = qca_get_speed(hu, QCA_OPER_SPEED);
1476                 if (!speed)
1477                         return 0;
1478
1479                 /* Disable flow control for wcn3990 to deassert RTS while
1480                  * changing the baudrate of chip and host.
1481                  */
1482                 switch (soc_type) {
1483                 case QCA_WCN3988:
1484                 case QCA_WCN3990:
1485                 case QCA_WCN3991:
1486                 case QCA_WCN3998:
1487                 case QCA_WCN6750:
1488                 case QCA_WCN6855:
1489                 case QCA_WCN7850:
1490                         hci_uart_set_flow_control(hu, true);
1491                         break;
1492
1493                 default:
1494                         break;
1495                 }
1496
1497                 switch (soc_type) {
1498                 case QCA_WCN3990:
1499                         reinit_completion(&qca->drop_ev_comp);
1500                         set_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1501                         break;
1502
1503                 default:
1504                         break;
1505                 }
1506
1507                 qca_baudrate = qca_get_baudrate_value(speed);
1508                 bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
1509                 ret = qca_set_baudrate(hu->hdev, qca_baudrate);
1510                 if (ret)
1511                         goto error;
1512
1513                 host_set_baudrate(hu, speed);
1514
1515 error:
1516                 switch (soc_type) {
1517                 case QCA_WCN3988:
1518                 case QCA_WCN3990:
1519                 case QCA_WCN3991:
1520                 case QCA_WCN3998:
1521                 case QCA_WCN6750:
1522                 case QCA_WCN6855:
1523                 case QCA_WCN7850:
1524                         hci_uart_set_flow_control(hu, false);
1525                         break;
1526
1527                 default:
1528                         break;
1529                 }
1530
1531                 switch (soc_type) {
1532                 case QCA_WCN3990:
1533                         /* Wait for the controller to send the vendor event
1534                          * for the baudrate change command.
1535                          */
1536                         if (!wait_for_completion_timeout(&qca->drop_ev_comp,
1537                                                  msecs_to_jiffies(100))) {
1538                                 bt_dev_err(hu->hdev,
1539                                            "Failed to change controller baudrate\n");
1540                                 ret = -ETIMEDOUT;
1541                         }
1542
1543                         clear_bit(QCA_DROP_VENDOR_EVENT, &qca->flags);
1544                         break;
1545
1546                 default:
1547                         break;
1548                 }
1549         }
1550
1551         return ret;
1552 }
1553
1554 static int qca_send_crashbuffer(struct hci_uart *hu)
1555 {
1556         struct qca_data *qca = hu->priv;
1557         struct sk_buff *skb;
1558
1559         skb = bt_skb_alloc(QCA_CRASHBYTE_PACKET_LEN, GFP_KERNEL);
1560         if (!skb) {
1561                 bt_dev_err(hu->hdev, "Failed to allocate memory for skb packet");
1562                 return -ENOMEM;
1563         }
1564
1565         /* We forcefully crash the controller, by sending 0xfb byte for
1566          * 1024 times. We also might have chance of losing data, To be
1567          * on safer side we send 1096 bytes to the SoC.
1568          */
1569         memset(skb_put(skb, QCA_CRASHBYTE_PACKET_LEN), QCA_MEMDUMP_BYTE,
1570                QCA_CRASHBYTE_PACKET_LEN);
1571         hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
1572         bt_dev_info(hu->hdev, "crash the soc to collect controller dump");
1573         skb_queue_tail(&qca->txq, skb);
1574         hci_uart_tx_wakeup(hu);
1575
1576         return 0;
1577 }
1578
1579 static void qca_wait_for_dump_collection(struct hci_dev *hdev)
1580 {
1581         struct hci_uart *hu = hci_get_drvdata(hdev);
1582         struct qca_data *qca = hu->priv;
1583
1584         wait_on_bit_timeout(&qca->flags, QCA_MEMDUMP_COLLECTION,
1585                             TASK_UNINTERRUPTIBLE, MEMDUMP_TIMEOUT_MS);
1586
1587         clear_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1588 }
1589
1590 static void qca_hw_error(struct hci_dev *hdev, u8 code)
1591 {
1592         struct hci_uart *hu = hci_get_drvdata(hdev);
1593         struct qca_data *qca = hu->priv;
1594
1595         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1596         set_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1597         bt_dev_info(hdev, "mem_dump_status: %d", qca->memdump_state);
1598
1599         if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1600                 /* If hardware error event received for other than QCA
1601                  * soc memory dump event, then we need to crash the SOC
1602                  * and wait here for 8 seconds to get the dump packets.
1603                  * This will block main thread to be on hold until we
1604                  * collect dump.
1605                  */
1606                 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1607                 qca_send_crashbuffer(hu);
1608                 qca_wait_for_dump_collection(hdev);
1609         } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1610                 /* Let us wait here until memory dump collected or
1611                  * memory dump timer expired.
1612                  */
1613                 bt_dev_info(hdev, "waiting for dump to complete");
1614                 qca_wait_for_dump_collection(hdev);
1615         }
1616
1617         mutex_lock(&qca->hci_memdump_lock);
1618         if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1619                 bt_dev_err(hu->hdev, "clearing allocated memory due to memdump timeout");
1620                 hci_devcd_abort(hu->hdev);
1621                 if (qca->qca_memdump) {
1622                         kfree(qca->qca_memdump);
1623                         qca->qca_memdump = NULL;
1624                 }
1625                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1626                 cancel_delayed_work(&qca->ctrl_memdump_timeout);
1627         }
1628         mutex_unlock(&qca->hci_memdump_lock);
1629
1630         if (qca->memdump_state == QCA_MEMDUMP_TIMEOUT ||
1631             qca->memdump_state == QCA_MEMDUMP_COLLECTED) {
1632                 cancel_work_sync(&qca->ctrl_memdump_evt);
1633                 skb_queue_purge(&qca->rx_memdump_q);
1634         }
1635
1636         clear_bit(QCA_HW_ERROR_EVENT, &qca->flags);
1637 }
1638
1639 static void qca_cmd_timeout(struct hci_dev *hdev)
1640 {
1641         struct hci_uart *hu = hci_get_drvdata(hdev);
1642         struct qca_data *qca = hu->priv;
1643
1644         set_bit(QCA_SSR_TRIGGERED, &qca->flags);
1645         if (qca->memdump_state == QCA_MEMDUMP_IDLE) {
1646                 set_bit(QCA_MEMDUMP_COLLECTION, &qca->flags);
1647                 qca_send_crashbuffer(hu);
1648                 qca_wait_for_dump_collection(hdev);
1649         } else if (qca->memdump_state == QCA_MEMDUMP_COLLECTING) {
1650                 /* Let us wait here until memory dump collected or
1651                  * memory dump timer expired.
1652                  */
1653                 bt_dev_info(hdev, "waiting for dump to complete");
1654                 qca_wait_for_dump_collection(hdev);
1655         }
1656
1657         mutex_lock(&qca->hci_memdump_lock);
1658         if (qca->memdump_state != QCA_MEMDUMP_COLLECTED) {
1659                 qca->memdump_state = QCA_MEMDUMP_TIMEOUT;
1660                 if (!test_bit(QCA_HW_ERROR_EVENT, &qca->flags)) {
1661                         /* Inject hw error event to reset the device
1662                          * and driver.
1663                          */
1664                         hci_reset_dev(hu->hdev);
1665                 }
1666         }
1667         mutex_unlock(&qca->hci_memdump_lock);
1668 }
1669
1670 static bool qca_wakeup(struct hci_dev *hdev)
1671 {
1672         struct hci_uart *hu = hci_get_drvdata(hdev);
1673         bool wakeup;
1674
1675         /* BT SoC attached through the serial bus is handled by the serdev driver.
1676          * So we need to use the device handle of the serdev driver to get the
1677          * status of device may wakeup.
1678          */
1679         wakeup = device_may_wakeup(&hu->serdev->ctrl->dev);
1680         bt_dev_dbg(hu->hdev, "wakeup status : %d", wakeup);
1681
1682         return wakeup;
1683 }
1684
1685 static int qca_regulator_init(struct hci_uart *hu)
1686 {
1687         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1688         struct qca_serdev *qcadev;
1689         int ret;
1690         bool sw_ctrl_state;
1691
1692         /* Check for vregs status, may be hci down has turned
1693          * off the voltage regulator.
1694          */
1695         qcadev = serdev_device_get_drvdata(hu->serdev);
1696         if (!qcadev->bt_power->vregs_on) {
1697                 serdev_device_close(hu->serdev);
1698                 ret = qca_regulator_enable(qcadev);
1699                 if (ret)
1700                         return ret;
1701
1702                 ret = serdev_device_open(hu->serdev);
1703                 if (ret) {
1704                         bt_dev_err(hu->hdev, "failed to open port");
1705                         return ret;
1706                 }
1707         }
1708
1709         switch (soc_type) {
1710         case QCA_WCN3988:
1711         case QCA_WCN3990:
1712         case QCA_WCN3991:
1713         case QCA_WCN3998:
1714                 /* Forcefully enable wcn399x to enter in to boot mode. */
1715                 host_set_baudrate(hu, 2400);
1716                 ret = qca_send_power_pulse(hu, false);
1717                 if (ret)
1718                         return ret;
1719                 break;
1720
1721         default:
1722                 break;
1723         }
1724
1725         /* For wcn6750 need to enable gpio bt_en */
1726         if (qcadev->bt_en) {
1727                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
1728                 msleep(50);
1729                 gpiod_set_value_cansleep(qcadev->bt_en, 1);
1730                 msleep(50);
1731                 if (qcadev->sw_ctrl) {
1732                         sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
1733                         bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
1734                 }
1735         }
1736
1737         qca_set_speed(hu, QCA_INIT_SPEED);
1738
1739         switch (soc_type) {
1740         case QCA_WCN3988:
1741         case QCA_WCN3990:
1742         case QCA_WCN3991:
1743         case QCA_WCN3998:
1744                 ret = qca_send_power_pulse(hu, true);
1745                 if (ret)
1746                         return ret;
1747                 break;
1748
1749         default:
1750                 break;
1751         }
1752
1753         /* Now the device is in ready state to communicate with host.
1754          * To sync host with device we need to reopen port.
1755          * Without this, we will have RTS and CTS synchronization
1756          * issues.
1757          */
1758         serdev_device_close(hu->serdev);
1759         ret = serdev_device_open(hu->serdev);
1760         if (ret) {
1761                 bt_dev_err(hu->hdev, "failed to open port");
1762                 return ret;
1763         }
1764
1765         hci_uart_set_flow_control(hu, false);
1766
1767         return 0;
1768 }
1769
1770 static int qca_power_on(struct hci_dev *hdev)
1771 {
1772         struct hci_uart *hu = hci_get_drvdata(hdev);
1773         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1774         struct qca_serdev *qcadev;
1775         struct qca_data *qca = hu->priv;
1776         int ret = 0;
1777
1778         /* Non-serdev device usually is powered by external power
1779          * and don't need additional action in driver for power on
1780          */
1781         if (!hu->serdev)
1782                 return 0;
1783
1784         switch (soc_type) {
1785         case QCA_WCN3988:
1786         case QCA_WCN3990:
1787         case QCA_WCN3991:
1788         case QCA_WCN3998:
1789         case QCA_WCN6750:
1790         case QCA_WCN6855:
1791         case QCA_WCN7850:
1792                 ret = qca_regulator_init(hu);
1793                 break;
1794
1795         default:
1796                 qcadev = serdev_device_get_drvdata(hu->serdev);
1797                 if (qcadev->bt_en) {
1798                         gpiod_set_value_cansleep(qcadev->bt_en, 1);
1799                         /* Controller needs time to bootup. */
1800                         msleep(150);
1801                 }
1802         }
1803
1804         clear_bit(QCA_BT_OFF, &qca->flags);
1805         return ret;
1806 }
1807
1808 static void hci_coredump_qca(struct hci_dev *hdev)
1809 {
1810         int err;
1811         static const u8 param[] = { 0x26 };
1812
1813         err = __hci_cmd_send(hdev, 0xfc0c, 1, param);
1814         if (err < 0)
1815                 bt_dev_err(hdev, "%s: trigger crash failed (%d)", __func__, err);
1816 }
1817
1818 static int qca_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
1819 {
1820         /* QCA uses 1 as non-HCI data path id for HFP */
1821         *data_path_id = 1;
1822         return 0;
1823 }
1824
1825 static int qca_configure_hfp_offload(struct hci_dev *hdev)
1826 {
1827         bt_dev_info(hdev, "HFP non-HCI data transport is supported");
1828         hdev->get_data_path_id = qca_get_data_path_id;
1829         /* Do not need to send HCI_Configure_Data_Path to configure non-HCI
1830          * data transport path for QCA controllers, so set below field as NULL.
1831          */
1832         hdev->get_codec_config_data = NULL;
1833         return 0;
1834 }
1835
1836 static int qca_setup(struct hci_uart *hu)
1837 {
1838         struct hci_dev *hdev = hu->hdev;
1839         struct qca_data *qca = hu->priv;
1840         unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
1841         unsigned int retries = 0;
1842         enum qca_btsoc_type soc_type = qca_soc_type(hu);
1843         const char *firmware_name = qca_get_firmware_name(hu);
1844         int ret;
1845         struct qca_btsoc_version ver;
1846         struct qca_serdev *qcadev;
1847         const char *soc_name;
1848
1849         ret = qca_check_speeds(hu);
1850         if (ret)
1851                 return ret;
1852
1853         clear_bit(QCA_ROM_FW, &qca->flags);
1854         /* Patch downloading has to be done without IBS mode */
1855         set_bit(QCA_IBS_DISABLED, &qca->flags);
1856
1857         /* Enable controller to do both LE scan and BR/EDR inquiry
1858          * simultaneously.
1859          */
1860         set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
1861
1862         switch (soc_type) {
1863         case QCA_QCA2066:
1864                 soc_name = "qca2066";
1865                 break;
1866
1867         case QCA_WCN3988:
1868         case QCA_WCN3990:
1869         case QCA_WCN3991:
1870         case QCA_WCN3998:
1871                 soc_name = "wcn399x";
1872                 break;
1873
1874         case QCA_WCN6750:
1875                 soc_name = "wcn6750";
1876                 break;
1877
1878         case QCA_WCN6855:
1879                 soc_name = "wcn6855";
1880                 break;
1881
1882         case QCA_WCN7850:
1883                 soc_name = "wcn7850";
1884                 break;
1885
1886         default:
1887                 soc_name = "ROME/QCA6390";
1888         }
1889         bt_dev_info(hdev, "setting up %s", soc_name);
1890
1891         qca->memdump_state = QCA_MEMDUMP_IDLE;
1892
1893 retry:
1894         ret = qca_power_on(hdev);
1895         if (ret)
1896                 goto out;
1897
1898         clear_bit(QCA_SSR_TRIGGERED, &qca->flags);
1899
1900         switch (soc_type) {
1901         case QCA_WCN3988:
1902         case QCA_WCN3990:
1903         case QCA_WCN3991:
1904         case QCA_WCN3998:
1905         case QCA_WCN6750:
1906         case QCA_WCN6855:
1907         case QCA_WCN7850:
1908                 qcadev = serdev_device_get_drvdata(hu->serdev);
1909                 if (qcadev->bdaddr_property_broken)
1910                         set_bit(HCI_QUIRK_BDADDR_PROPERTY_BROKEN, &hdev->quirks);
1911
1912                 hci_set_aosp_capable(hdev);
1913
1914                 ret = qca_read_soc_version(hdev, &ver, soc_type);
1915                 if (ret)
1916                         goto out;
1917                 break;
1918
1919         default:
1920                 qca_set_speed(hu, QCA_INIT_SPEED);
1921         }
1922
1923         /* Setup user speed if needed */
1924         speed = qca_get_speed(hu, QCA_OPER_SPEED);
1925         if (speed) {
1926                 ret = qca_set_speed(hu, QCA_OPER_SPEED);
1927                 if (ret)
1928                         goto out;
1929
1930                 qca_baudrate = qca_get_baudrate_value(speed);
1931         }
1932
1933         switch (soc_type) {
1934         case QCA_WCN3988:
1935         case QCA_WCN3990:
1936         case QCA_WCN3991:
1937         case QCA_WCN3998:
1938         case QCA_WCN6750:
1939         case QCA_WCN6855:
1940         case QCA_WCN7850:
1941                 break;
1942
1943         default:
1944                 /* Get QCA version information */
1945                 ret = qca_read_soc_version(hdev, &ver, soc_type);
1946                 if (ret)
1947                         goto out;
1948         }
1949
1950         /* Setup patch / NVM configurations */
1951         ret = qca_uart_setup(hdev, qca_baudrate, soc_type, ver,
1952                         firmware_name);
1953         if (!ret) {
1954                 clear_bit(QCA_IBS_DISABLED, &qca->flags);
1955                 qca_debugfs_init(hdev);
1956                 hu->hdev->hw_error = qca_hw_error;
1957                 hu->hdev->cmd_timeout = qca_cmd_timeout;
1958                 if (device_can_wakeup(hu->serdev->ctrl->dev.parent))
1959                         hu->hdev->wakeup = qca_wakeup;
1960         } else if (ret == -ENOENT) {
1961                 /* No patch/nvm-config found, run with original fw/config */
1962                 set_bit(QCA_ROM_FW, &qca->flags);
1963                 ret = 0;
1964         } else if (ret == -EAGAIN) {
1965                 /*
1966                  * Userspace firmware loader will return -EAGAIN in case no
1967                  * patch/nvm-config is found, so run with original fw/config.
1968                  */
1969                 set_bit(QCA_ROM_FW, &qca->flags);
1970                 ret = 0;
1971         }
1972
1973 out:
1974         if (ret && retries < MAX_INIT_RETRIES) {
1975                 bt_dev_warn(hdev, "Retry BT power ON:%d", retries);
1976                 qca_power_shutdown(hu);
1977                 if (hu->serdev) {
1978                         serdev_device_close(hu->serdev);
1979                         ret = serdev_device_open(hu->serdev);
1980                         if (ret) {
1981                                 bt_dev_err(hdev, "failed to open port");
1982                                 return ret;
1983                         }
1984                 }
1985                 retries++;
1986                 goto retry;
1987         }
1988
1989         /* Setup bdaddr */
1990         if (soc_type == QCA_ROME)
1991                 hu->hdev->set_bdaddr = qca_set_bdaddr_rome;
1992         else
1993                 hu->hdev->set_bdaddr = qca_set_bdaddr;
1994
1995         if (soc_type == QCA_QCA2066)
1996                 qca_configure_hfp_offload(hdev);
1997
1998         qca->fw_version = le16_to_cpu(ver.patch_ver);
1999         qca->controller_id = le16_to_cpu(ver.rom_ver);
2000         hci_devcd_register(hdev, hci_coredump_qca, qca_dmp_hdr, NULL);
2001
2002         return ret;
2003 }
2004
2005 static const struct hci_uart_proto qca_proto = {
2006         .id             = HCI_UART_QCA,
2007         .name           = "QCA",
2008         .manufacturer   = 29,
2009         .init_speed     = 115200,
2010         .oper_speed     = 3000000,
2011         .open           = qca_open,
2012         .close          = qca_close,
2013         .flush          = qca_flush,
2014         .setup          = qca_setup,
2015         .recv           = qca_recv,
2016         .enqueue        = qca_enqueue,
2017         .dequeue        = qca_dequeue,
2018 };
2019
2020 static const struct qca_device_data qca_soc_data_wcn3988 __maybe_unused = {
2021         .soc_type = QCA_WCN3988,
2022         .vregs = (struct qca_vreg []) {
2023                 { "vddio", 15000  },
2024                 { "vddxo", 80000  },
2025                 { "vddrf", 300000 },
2026                 { "vddch0", 450000 },
2027         },
2028         .num_vregs = 4,
2029 };
2030
2031 static const struct qca_device_data qca_soc_data_wcn3990 __maybe_unused = {
2032         .soc_type = QCA_WCN3990,
2033         .vregs = (struct qca_vreg []) {
2034                 { "vddio", 15000  },
2035                 { "vddxo", 80000  },
2036                 { "vddrf", 300000 },
2037                 { "vddch0", 450000 },
2038         },
2039         .num_vregs = 4,
2040 };
2041
2042 static const struct qca_device_data qca_soc_data_wcn3991 __maybe_unused = {
2043         .soc_type = QCA_WCN3991,
2044         .vregs = (struct qca_vreg []) {
2045                 { "vddio", 15000  },
2046                 { "vddxo", 80000  },
2047                 { "vddrf", 300000 },
2048                 { "vddch0", 450000 },
2049         },
2050         .num_vregs = 4,
2051         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2052 };
2053
2054 static const struct qca_device_data qca_soc_data_wcn3998 __maybe_unused = {
2055         .soc_type = QCA_WCN3998,
2056         .vregs = (struct qca_vreg []) {
2057                 { "vddio", 10000  },
2058                 { "vddxo", 80000  },
2059                 { "vddrf", 300000 },
2060                 { "vddch0", 450000 },
2061         },
2062         .num_vregs = 4,
2063 };
2064
2065 static const struct qca_device_data qca_soc_data_qca2066 __maybe_unused = {
2066         .soc_type = QCA_QCA2066,
2067         .num_vregs = 0,
2068         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2069 };
2070
2071 static const struct qca_device_data qca_soc_data_qca6390 __maybe_unused = {
2072         .soc_type = QCA_QCA6390,
2073         .num_vregs = 0,
2074 };
2075
2076 static const struct qca_device_data qca_soc_data_wcn6750 __maybe_unused = {
2077         .soc_type = QCA_WCN6750,
2078         .vregs = (struct qca_vreg []) {
2079                 { "vddio", 5000 },
2080                 { "vddaon", 26000 },
2081                 { "vddbtcxmx", 126000 },
2082                 { "vddrfacmn", 12500 },
2083                 { "vddrfa0p8", 102000 },
2084                 { "vddrfa1p7", 302000 },
2085                 { "vddrfa1p2", 257000 },
2086                 { "vddrfa2p2", 1700000 },
2087                 { "vddasd", 200 },
2088         },
2089         .num_vregs = 9,
2090         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2091 };
2092
2093 static const struct qca_device_data qca_soc_data_wcn6855 __maybe_unused = {
2094         .soc_type = QCA_WCN6855,
2095         .vregs = (struct qca_vreg []) {
2096                 { "vddio", 5000 },
2097                 { "vddbtcxmx", 126000 },
2098                 { "vddrfacmn", 12500 },
2099                 { "vddrfa0p8", 102000 },
2100                 { "vddrfa1p7", 302000 },
2101                 { "vddrfa1p2", 257000 },
2102         },
2103         .num_vregs = 6,
2104         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2105 };
2106
2107 static const struct qca_device_data qca_soc_data_wcn7850 __maybe_unused = {
2108         .soc_type = QCA_WCN7850,
2109         .vregs = (struct qca_vreg []) {
2110                 { "vddio", 5000 },
2111                 { "vddaon", 26000 },
2112                 { "vdddig", 126000 },
2113                 { "vddrfa0p8", 102000 },
2114                 { "vddrfa1p2", 257000 },
2115                 { "vddrfa1p9", 302000 },
2116         },
2117         .num_vregs = 6,
2118         .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
2119 };
2120
2121 static void qca_power_shutdown(struct hci_uart *hu)
2122 {
2123         struct qca_serdev *qcadev;
2124         struct qca_data *qca = hu->priv;
2125         unsigned long flags;
2126         enum qca_btsoc_type soc_type = qca_soc_type(hu);
2127         bool sw_ctrl_state;
2128
2129         /* From this point we go into power off state. But serial port is
2130          * still open, stop queueing the IBS data and flush all the buffered
2131          * data in skb's.
2132          */
2133         spin_lock_irqsave(&qca->hci_ibs_lock, flags);
2134         set_bit(QCA_IBS_DISABLED, &qca->flags);
2135         qca_flush(hu);
2136         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
2137
2138         /* Non-serdev device usually is powered by external power
2139          * and don't need additional action in driver for power down
2140          */
2141         if (!hu->serdev)
2142                 return;
2143
2144         qcadev = serdev_device_get_drvdata(hu->serdev);
2145
2146         switch (soc_type) {
2147         case QCA_WCN3988:
2148         case QCA_WCN3990:
2149         case QCA_WCN3991:
2150         case QCA_WCN3998:
2151                 host_set_baudrate(hu, 2400);
2152                 qca_send_power_pulse(hu, false);
2153                 qca_regulator_disable(qcadev);
2154                 break;
2155
2156         case QCA_WCN6750:
2157         case QCA_WCN6855:
2158                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
2159                 msleep(100);
2160                 qca_regulator_disable(qcadev);
2161                 if (qcadev->sw_ctrl) {
2162                         sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl);
2163                         bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state);
2164                 }
2165                 break;
2166
2167         default:
2168                 gpiod_set_value_cansleep(qcadev->bt_en, 0);
2169         }
2170
2171         set_bit(QCA_BT_OFF, &qca->flags);
2172 }
2173
2174 static int qca_power_off(struct hci_dev *hdev)
2175 {
2176         struct hci_uart *hu = hci_get_drvdata(hdev);
2177         struct qca_data *qca = hu->priv;
2178         enum qca_btsoc_type soc_type = qca_soc_type(hu);
2179
2180         hu->hdev->hw_error = NULL;
2181         hu->hdev->cmd_timeout = NULL;
2182
2183         del_timer_sync(&qca->wake_retrans_timer);
2184         del_timer_sync(&qca->tx_idle_timer);
2185
2186         /* Stop sending shutdown command if soc crashes. */
2187         if (soc_type != QCA_ROME
2188                 && qca->memdump_state == QCA_MEMDUMP_IDLE) {
2189                 qca_send_pre_shutdown_cmd(hdev);
2190                 usleep_range(8000, 10000);
2191         }
2192
2193         qca_power_shutdown(hu);
2194         return 0;
2195 }
2196
2197 static int qca_regulator_enable(struct qca_serdev *qcadev)
2198 {
2199         struct qca_power *power = qcadev->bt_power;
2200         int ret;
2201
2202         /* Already enabled */
2203         if (power->vregs_on)
2204                 return 0;
2205
2206         BT_DBG("enabling %d regulators)", power->num_vregs);
2207
2208         ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk);
2209         if (ret)
2210                 return ret;
2211
2212         power->vregs_on = true;
2213
2214         ret = clk_prepare_enable(qcadev->susclk);
2215         if (ret)
2216                 qca_regulator_disable(qcadev);
2217
2218         return ret;
2219 }
2220
2221 static void qca_regulator_disable(struct qca_serdev *qcadev)
2222 {
2223         struct qca_power *power;
2224
2225         if (!qcadev)
2226                 return;
2227
2228         power = qcadev->bt_power;
2229
2230         /* Already disabled? */
2231         if (!power->vregs_on)
2232                 return;
2233
2234         regulator_bulk_disable(power->num_vregs, power->vreg_bulk);
2235         power->vregs_on = false;
2236
2237         clk_disable_unprepare(qcadev->susclk);
2238 }
2239
2240 static int qca_init_regulators(struct qca_power *qca,
2241                                 const struct qca_vreg *vregs, size_t num_vregs)
2242 {
2243         struct regulator_bulk_data *bulk;
2244         int ret;
2245         int i;
2246
2247         bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL);
2248         if (!bulk)
2249                 return -ENOMEM;
2250
2251         for (i = 0; i < num_vregs; i++)
2252                 bulk[i].supply = vregs[i].name;
2253
2254         ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk);
2255         if (ret < 0)
2256                 return ret;
2257
2258         for (i = 0; i < num_vregs; i++) {
2259                 ret = regulator_set_load(bulk[i].consumer, vregs[i].load_uA);
2260                 if (ret)
2261                         return ret;
2262         }
2263
2264         qca->vreg_bulk = bulk;
2265         qca->num_vregs = num_vregs;
2266
2267         return 0;
2268 }
2269
2270 static int qca_serdev_probe(struct serdev_device *serdev)
2271 {
2272         struct qca_serdev *qcadev;
2273         struct hci_dev *hdev;
2274         const struct qca_device_data *data;
2275         int err;
2276         bool power_ctrl_enabled = true;
2277
2278         qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
2279         if (!qcadev)
2280                 return -ENOMEM;
2281
2282         qcadev->serdev_hu.serdev = serdev;
2283         data = device_get_match_data(&serdev->dev);
2284         serdev_device_set_drvdata(serdev, qcadev);
2285         device_property_read_string(&serdev->dev, "firmware-name",
2286                                          &qcadev->firmware_name);
2287         device_property_read_u32(&serdev->dev, "max-speed",
2288                                  &qcadev->oper_speed);
2289         if (!qcadev->oper_speed)
2290                 BT_DBG("UART will pick default operating speed");
2291
2292         qcadev->bdaddr_property_broken = device_property_read_bool(&serdev->dev,
2293                         "qcom,local-bd-address-broken");
2294
2295         if (data)
2296                 qcadev->btsoc_type = data->soc_type;
2297         else
2298                 qcadev->btsoc_type = QCA_ROME;
2299
2300         switch (qcadev->btsoc_type) {
2301         case QCA_WCN3988:
2302         case QCA_WCN3990:
2303         case QCA_WCN3991:
2304         case QCA_WCN3998:
2305         case QCA_WCN6750:
2306         case QCA_WCN6855:
2307         case QCA_WCN7850:
2308                 qcadev->bt_power = devm_kzalloc(&serdev->dev,
2309                                                 sizeof(struct qca_power),
2310                                                 GFP_KERNEL);
2311                 if (!qcadev->bt_power)
2312                         return -ENOMEM;
2313
2314                 qcadev->bt_power->dev = &serdev->dev;
2315                 err = qca_init_regulators(qcadev->bt_power, data->vregs,
2316                                           data->num_vregs);
2317                 if (err) {
2318                         BT_ERR("Failed to init regulators:%d", err);
2319                         return err;
2320                 }
2321
2322                 qcadev->bt_power->vregs_on = false;
2323
2324                 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2325                                                GPIOD_OUT_LOW);
2326                 if (IS_ERR(qcadev->bt_en) &&
2327                     (data->soc_type == QCA_WCN6750 ||
2328                      data->soc_type == QCA_WCN6855)) {
2329                         dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");
2330                         power_ctrl_enabled = false;
2331                 }
2332
2333                 qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
2334                                                GPIOD_IN);
2335                 if (IS_ERR(qcadev->sw_ctrl) &&
2336                     (data->soc_type == QCA_WCN6750 ||
2337                      data->soc_type == QCA_WCN6855 ||
2338                      data->soc_type == QCA_WCN7850))
2339                         dev_warn(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
2340
2341                 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2342                 if (IS_ERR(qcadev->susclk)) {
2343                         dev_err(&serdev->dev, "failed to acquire clk\n");
2344                         return PTR_ERR(qcadev->susclk);
2345                 }
2346
2347                 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2348                 if (err) {
2349                         BT_ERR("wcn3990 serdev registration failed");
2350                         return err;
2351                 }
2352                 break;
2353
2354         default:
2355                 qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
2356                                                GPIOD_OUT_LOW);
2357                 if (IS_ERR(qcadev->bt_en)) {
2358                         dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
2359                         power_ctrl_enabled = false;
2360                 }
2361
2362                 qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
2363                 if (IS_ERR(qcadev->susclk)) {
2364                         dev_warn(&serdev->dev, "failed to acquire clk\n");
2365                         return PTR_ERR(qcadev->susclk);
2366                 }
2367                 err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
2368                 if (err)
2369                         return err;
2370
2371                 err = clk_prepare_enable(qcadev->susclk);
2372                 if (err)
2373                         return err;
2374
2375                 err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
2376                 if (err) {
2377                         BT_ERR("Rome serdev registration failed");
2378                         clk_disable_unprepare(qcadev->susclk);
2379                         return err;
2380                 }
2381         }
2382
2383         hdev = qcadev->serdev_hu.hdev;
2384
2385         if (power_ctrl_enabled) {
2386                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
2387                 hdev->shutdown = qca_power_off;
2388         }
2389
2390         if (data) {
2391                 /* Wideband speech support must be set per driver since it can't
2392                  * be queried via hci. Same with the valid le states quirk.
2393                  */
2394                 if (data->capabilities & QCA_CAP_WIDEBAND_SPEECH)
2395                         set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
2396                                 &hdev->quirks);
2397
2398                 if (data->capabilities & QCA_CAP_VALID_LE_STATES)
2399                         set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
2400         }
2401
2402         return 0;
2403 }
2404
2405 static void qca_serdev_remove(struct serdev_device *serdev)
2406 {
2407         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2408         struct qca_power *power = qcadev->bt_power;
2409
2410         switch (qcadev->btsoc_type) {
2411         case QCA_WCN3988:
2412         case QCA_WCN3990:
2413         case QCA_WCN3991:
2414         case QCA_WCN3998:
2415         case QCA_WCN6750:
2416         case QCA_WCN6855:
2417         case QCA_WCN7850:
2418                 if (power->vregs_on) {
2419                         qca_power_shutdown(&qcadev->serdev_hu);
2420                         break;
2421                 }
2422                 fallthrough;
2423
2424         default:
2425                 if (qcadev->susclk)
2426                         clk_disable_unprepare(qcadev->susclk);
2427         }
2428
2429         hci_uart_unregister_device(&qcadev->serdev_hu);
2430 }
2431
2432 static void qca_serdev_shutdown(struct device *dev)
2433 {
2434         int ret;
2435         int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
2436         struct serdev_device *serdev = to_serdev_device(dev);
2437         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2438         struct hci_uart *hu = &qcadev->serdev_hu;
2439         struct hci_dev *hdev = hu->hdev;
2440         struct qca_data *qca = hu->priv;
2441         const u8 ibs_wake_cmd[] = { 0xFD };
2442         const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
2443
2444         if (qcadev->btsoc_type == QCA_QCA6390) {
2445                 if (test_bit(QCA_BT_OFF, &qca->flags) ||
2446                     !test_bit(HCI_RUNNING, &hdev->flags))
2447                         return;
2448
2449                 serdev_device_write_flush(serdev);
2450                 ret = serdev_device_write_buf(serdev, ibs_wake_cmd,
2451                                               sizeof(ibs_wake_cmd));
2452                 if (ret < 0) {
2453                         BT_ERR("QCA send IBS_WAKE_IND error: %d", ret);
2454                         return;
2455                 }
2456                 serdev_device_wait_until_sent(serdev, timeout);
2457                 usleep_range(8000, 10000);
2458
2459                 serdev_device_write_flush(serdev);
2460                 ret = serdev_device_write_buf(serdev, edl_reset_soc_cmd,
2461                                               sizeof(edl_reset_soc_cmd));
2462                 if (ret < 0) {
2463                         BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
2464                         return;
2465                 }
2466                 serdev_device_wait_until_sent(serdev, timeout);
2467                 usleep_range(8000, 10000);
2468         }
2469 }
2470
2471 static int __maybe_unused qca_suspend(struct device *dev)
2472 {
2473         struct serdev_device *serdev = to_serdev_device(dev);
2474         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2475         struct hci_uart *hu = &qcadev->serdev_hu;
2476         struct qca_data *qca = hu->priv;
2477         unsigned long flags;
2478         bool tx_pending = false;
2479         int ret = 0;
2480         u8 cmd;
2481         u32 wait_timeout = 0;
2482
2483         set_bit(QCA_SUSPENDING, &qca->flags);
2484
2485         /* if BT SoC is running with default firmware then it does not
2486          * support in-band sleep
2487          */
2488         if (test_bit(QCA_ROM_FW, &qca->flags))
2489                 return 0;
2490
2491         /* During SSR after memory dump collection, controller will be
2492          * powered off and then powered on.If controller is powered off
2493          * during SSR then we should wait until SSR is completed.
2494          */
2495         if (test_bit(QCA_BT_OFF, &qca->flags) &&
2496             !test_bit(QCA_SSR_TRIGGERED, &qca->flags))
2497                 return 0;
2498
2499         if (test_bit(QCA_IBS_DISABLED, &qca->flags) ||
2500             test_bit(QCA_SSR_TRIGGERED, &qca->flags)) {
2501                 wait_timeout = test_bit(QCA_SSR_TRIGGERED, &qca->flags) ?
2502                                         IBS_DISABLE_SSR_TIMEOUT_MS :
2503                                         FW_DOWNLOAD_TIMEOUT_MS;
2504
2505                 /* QCA_IBS_DISABLED flag is set to true, During FW download
2506                  * and during memory dump collection. It is reset to false,
2507                  * After FW download complete.
2508                  */
2509                 wait_on_bit_timeout(&qca->flags, QCA_IBS_DISABLED,
2510                             TASK_UNINTERRUPTIBLE, msecs_to_jiffies(wait_timeout));
2511
2512                 if (test_bit(QCA_IBS_DISABLED, &qca->flags)) {
2513                         bt_dev_err(hu->hdev, "SSR or FW download time out");
2514                         ret = -ETIMEDOUT;
2515                         goto error;
2516                 }
2517         }
2518
2519         cancel_work_sync(&qca->ws_awake_device);
2520         cancel_work_sync(&qca->ws_awake_rx);
2521
2522         spin_lock_irqsave_nested(&qca->hci_ibs_lock,
2523                                  flags, SINGLE_DEPTH_NESTING);
2524
2525         switch (qca->tx_ibs_state) {
2526         case HCI_IBS_TX_WAKING:
2527                 del_timer(&qca->wake_retrans_timer);
2528                 fallthrough;
2529         case HCI_IBS_TX_AWAKE:
2530                 del_timer(&qca->tx_idle_timer);
2531
2532                 serdev_device_write_flush(hu->serdev);
2533                 cmd = HCI_IBS_SLEEP_IND;
2534                 ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
2535
2536                 if (ret < 0) {
2537                         BT_ERR("Failed to send SLEEP to device");
2538                         break;
2539                 }
2540
2541                 qca->tx_ibs_state = HCI_IBS_TX_ASLEEP;
2542                 qca->ibs_sent_slps++;
2543                 tx_pending = true;
2544                 break;
2545
2546         case HCI_IBS_TX_ASLEEP:
2547                 break;
2548
2549         default:
2550                 BT_ERR("Spurious tx state %d", qca->tx_ibs_state);
2551                 ret = -EINVAL;
2552                 break;
2553         }
2554
2555         spin_unlock_irqrestore(&qca->hci_ibs_lock, flags);
2556
2557         if (ret < 0)
2558                 goto error;
2559
2560         if (tx_pending) {
2561                 serdev_device_wait_until_sent(hu->serdev,
2562                                               msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS));
2563                 serial_clock_vote(HCI_IBS_TX_VOTE_CLOCK_OFF, hu);
2564         }
2565
2566         /* Wait for HCI_IBS_SLEEP_IND sent by device to indicate its Tx is going
2567          * to sleep, so that the packet does not wake the system later.
2568          */
2569         ret = wait_event_interruptible_timeout(qca->suspend_wait_q,
2570                         qca->rx_ibs_state == HCI_IBS_RX_ASLEEP,
2571                         msecs_to_jiffies(IBS_BTSOC_TX_IDLE_TIMEOUT_MS));
2572         if (ret == 0) {
2573                 ret = -ETIMEDOUT;
2574                 goto error;
2575         }
2576
2577         return 0;
2578
2579 error:
2580         clear_bit(QCA_SUSPENDING, &qca->flags);
2581
2582         return ret;
2583 }
2584
2585 static int __maybe_unused qca_resume(struct device *dev)
2586 {
2587         struct serdev_device *serdev = to_serdev_device(dev);
2588         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2589         struct hci_uart *hu = &qcadev->serdev_hu;
2590         struct qca_data *qca = hu->priv;
2591
2592         clear_bit(QCA_SUSPENDING, &qca->flags);
2593
2594         return 0;
2595 }
2596
2597 static SIMPLE_DEV_PM_OPS(qca_pm_ops, qca_suspend, qca_resume);
2598
2599 #ifdef CONFIG_OF
2600 static const struct of_device_id qca_bluetooth_of_match[] = {
2601         { .compatible = "qcom,qca2066-bt", .data = &qca_soc_data_qca2066},
2602         { .compatible = "qcom,qca6174-bt" },
2603         { .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},
2604         { .compatible = "qcom,qca9377-bt" },
2605         { .compatible = "qcom,wcn3988-bt", .data = &qca_soc_data_wcn3988},
2606         { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},
2607         { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},
2608         { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},
2609         { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750},
2610         { .compatible = "qcom,wcn6855-bt", .data = &qca_soc_data_wcn6855},
2611         { .compatible = "qcom,wcn7850-bt", .data = &qca_soc_data_wcn7850},
2612         { /* sentinel */ }
2613 };
2614 MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
2615 #endif
2616
2617 #ifdef CONFIG_ACPI
2618 static const struct acpi_device_id qca_bluetooth_acpi_match[] = {
2619         { "QCOM2066", (kernel_ulong_t)&qca_soc_data_qca2066 },
2620         { "QCOM6390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2621         { "DLA16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2622         { "DLB16390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2623         { "DLB26390", (kernel_ulong_t)&qca_soc_data_qca6390 },
2624         { },
2625 };
2626 MODULE_DEVICE_TABLE(acpi, qca_bluetooth_acpi_match);
2627 #endif
2628
2629 #ifdef CONFIG_DEV_COREDUMP
2630 static void hciqca_coredump(struct device *dev)
2631 {
2632         struct serdev_device *serdev = to_serdev_device(dev);
2633         struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
2634         struct hci_uart *hu = &qcadev->serdev_hu;
2635         struct hci_dev  *hdev = hu->hdev;
2636
2637         if (hdev->dump.coredump)
2638                 hdev->dump.coredump(hdev);
2639 }
2640 #endif
2641
2642 static struct serdev_device_driver qca_serdev_driver = {
2643         .probe = qca_serdev_probe,
2644         .remove = qca_serdev_remove,
2645         .driver = {
2646                 .name = "hci_uart_qca",
2647                 .of_match_table = of_match_ptr(qca_bluetooth_of_match),
2648                 .acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
2649                 .shutdown = qca_serdev_shutdown,
2650                 .pm = &qca_pm_ops,
2651 #ifdef CONFIG_DEV_COREDUMP
2652                 .coredump = hciqca_coredump,
2653 #endif
2654         },
2655 };
2656
2657 int __init qca_init(void)
2658 {
2659         serdev_device_driver_register(&qca_serdev_driver);
2660
2661         return hci_uart_register_proto(&qca_proto);
2662 }
2663
2664 int __exit qca_deinit(void)
2665 {
2666         serdev_device_driver_unregister(&qca_serdev_driver);
2667
2668         return hci_uart_unregister_proto(&qca_proto);
2669 }